/* roulang page: index */
:root {
            --clr-primary: #2E6BE6;
            --clr-primary-dark: #1A3F7A;
            --clr-accent: #0FA3A3;
            --clr-cta: #FF7A45;
            --clr-bg: #FFFFFF;
            --clr-bg-alt: #F5F8FD;
            --clr-bg-soft: #EDF2FA;
            --clr-text: #1E2A3A;
            --clr-text-sub: #5A6B80;
            --clr-text-muted: #98A8BC;
            --clr-border: #E2E9F2;
            --clr-divider: #EAF0F6;
            --shadow-sm: 0 4px 16px rgba(30,42,58,0.06);
            --shadow-md: 0 8px 24px rgba(30,42,58,0.12);
            --shadow-lg: 0 16px 40px rgba(30,42,58,0.16);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-full: 999px;
            --font-primary: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Alibaba PuHuiTi", sans-serif;
            --font-num: "Inter", "SF Pro Display", "Roboto", sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        body {
            font-family: var(--font-primary);
            font-size: 16px;
            line-height: 1.7;
            color: var(--clr-text);
            background: var(--clr-bg);
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s ease;
        }

        img {
            max-width: 100%;
            height: auto;
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section-padding {
            padding: 80px 0;
        }
        .section-padding-sm {
            padding: 48px 0;
        }

        /* === 导航 === */
        .custom-navbar {
            height: 64px;
            padding: 0 24px;
            background: var(--clr-bg);
            border-bottom: 1px solid var(--clr-border);
            position: sticky;
            top: 0;
            z-index: 1050;
        }
        .custom-navbar .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0;
            margin-right: 32px;
        }
        .brand-icon {
            width: 38px;
            height: 38px;
            background: var(--clr-primary);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 17px;
            box-shadow: 0 4px 12px rgba(46,107,230,0.25);
        }
        .brand-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--clr-primary-dark);
            letter-spacing: .5px;
        }
        .custom-navbar .navbar-collapse {
            justify-content: space-between;
            align-items: center;
        }
        .custom-navbar .navbar-nav {
            gap: 32px;
            align-items: center;
        }
        .custom-navbar .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--clr-text);
            padding: 0 !important;
            line-height: 64px;
            position: relative;
            white-space: nowrap;
        }
        .custom-navbar .nav-link::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 50%;
            right: 50%;
            height: 2px;
            background: var(--clr-primary);
            border-radius: 2px;
            transition: all .2s ease;
        }
        .custom-navbar .nav-link.active,
        .custom-navbar .nav-link:hover {
            color: var(--clr-primary);
        }
        .custom-navbar .nav-link.active::after,
        .custom-navbar .nav-link:hover::after {
            left: 0;
            right: 0;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .command-search {
            position: relative;
            display: flex;
            align-items: center;
            width: 220px;
            height: 40px;
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-full);
            padding: 0 14px;
            background: var(--clr-bg-alt);
            transition: width .25s ease, border-color .25s ease, box-shadow .25s ease;
        }
        .command-search:focus-within {
            width: 300px;
            border-color: var(--clr-primary);
            box-shadow: 0 0 0 4px rgba(46,107,230,0.12);
            background: var(--clr-bg);
        }
        .command-search i {
            color: var(--clr-text-muted);
            font-size: 14px;
            margin-right: 8px;
        }
        .command-search input {
            border: none;
            outline: none;
            background: transparent;
            font-size: 14px;
            color: var(--clr-text);
            flex: 1;
            min-width: 0;
        }
        .command-search input::placeholder {
            color: var(--clr-text-muted);
        }
        .command-search .kbd {
            font-size: 11px;
            color: var(--clr-text-muted);
            background: var(--clr-bg);
            border: 1px solid var(--clr-border);
            border-radius: 5px;
            padding: 2px 6px;
            font-family: var(--font-num);
            white-space: nowrap;
        }
        .nav-login,
        .nav-register {
            font-size: 14px;
            font-weight: 500;
            color: var(--clr-text-sub);
            white-space: nowrap;
        }
        .nav-login:hover,
        .nav-register:hover {
            color: var(--clr-primary);
        }
        .btn-cta {
            height: 36px;
            padding: 0 20px;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-full);
            background: var(--clr-primary);
            border: 1px solid var(--clr-primary);
            color: #fff;
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: all .2s ease;
        }
        .btn-cta:hover {
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
            background: #3d7bf0;
            border-color: #3d7bf0;
            color: #fff;
        }
        .btn-cta:active {
            transform: translateY(0);
            box-shadow: none;
        }
        .navbar-toggler {
            border: none;
            padding: 4px 8px;
            outline: none !important;
            box-shadow: none !important;
        }
        .navbar-toggler-icon {
            background-image: none !important;
            position: relative;
            width: 22px;
            height: 2px;
            background: var(--clr-text);
            display: block;
            border-radius: 2px;
            transition: all .2s ease;
        }
        .navbar-toggler-icon::before,
        .navbar-toggler-icon::after {
            content: "";
            position: absolute;
            left: 0;
            width: 22px;
            height: 2px;
            background: var(--clr-text);
            border-radius: 2px;
            transition: all .2s ease;
        }
        .navbar-toggler-icon::before {
            top: -7px;
        }
        .navbar-toggler-icon::after {
            top: 7px;
        }
        .navbar-toggler[aria-expanded="true"] .navbar-toggler-icon {
            background: transparent;
        }
        .navbar-toggler[aria-expanded="true"] .navbar-toggler-icon::before {
            top: 0;
            transform: rotate(45deg);
        }
        .navbar-toggler[aria-expanded="true"] .navbar-toggler-icon::after {
            top: 0;
            transform: rotate(-45deg);
        }

        /* === 按钮通用 === */
        .btn {
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: all .2s ease;
        }
        .btn-primary {
            background: var(--clr-primary);
            border-color: var(--clr-primary);
        }
        .btn-primary:hover {
            background: #3d7bf0;
            border-color: #3d7bf0;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-outline-primary {
            border: 1px solid var(--clr-primary);
            color: var(--clr-primary);
            background: transparent;
        }
        .btn-outline-primary:hover {
            background: rgba(46,107,230,0.1);
            color: var(--clr-primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }
        .btn-lg {
            height: 48px;
            padding: 0 30px;
            font-size: 15px;
        }

        /* === Hero === */
        .hero-section {
            min-height: 640px;
            display: flex;
            align-items: center;
            padding: 80px 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-color: rgba(234, 240, 248, 0.72);
            background-blend-mode: overlay;
            position: relative;
        }
        .hero-row {
            align-items: center;
            gap: 40px 0;
        }
        .hero-content {
            padding-right: 30px;
        }
        .hero-content h1 {
            font-size: 42px;
            font-weight: 800;
            color: var(--clr-primary-dark);
            line-height: 1.25;
            margin-bottom: 18px;
        }
        .hero-subtitle {
            font-size: 17px;
            color: var(--clr-text-sub);
            line-height: 1.8;
            max-width: 460px;
            margin-bottom: 28px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        .hero-features {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
        }
        .hero-features span {
            font-size: 14px;
            color: var(--clr-text-sub);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .hero-features i {
            color: var(--clr-primary);
        }
        .hero-visual {
            display: flex;
            justify-content: center;
            position: relative;
        }
        .phone-mockup {
            width: 290px;
            height: 580px;
            border: 4px solid #111;
            border-radius: 36px;
            background: #f7f9fc;
            position: relative;
            box-shadow: var(--shadow-lg);
            overflow: hidden;
        }
        .phone-notch {
            position: absolute;
            top: 10px;
            left: 50%;
            transform: translateX(-50%);
            width: 120px;
            height: 26px;
            background: #111;
            border-radius: 20px;
            z-index: 3;
        }
        .phone-screen {
            width: 100%;
            height: 100%;
            position: relative;
            background: #eef2f8;
        }
        .phone-screen img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }
        .phone-footer {
            position: absolute;
            bottom: 14px;
            left: 0;
            right: 0;
            display: flex;
            justify-content: center;
            gap: 8px;
            z-index: 3;
        }
        .phone-footer span {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.9);
            box-shadow: 0 2px 6px rgba(0,0,0,0.2);
        }
        .login-status {
            position: absolute;
            right: -30px;
            top: 40px;
            background: rgba(20, 40, 70, 0.9);
            color: #fff;
            font-size: 13px;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: var(--radius-full);
            display: flex;
            align-items: center;
            gap: 6px;
            box-shadow: var(--shadow-md);
            z-index: 4;
            backdrop-filter: blur(4px);
        }
        .login-dot {
            width: 8px;
            height: 8px;
            background: #34d399;
            border-radius: 50%;
            display: inline-block;
            animation: pulse 1.8s infinite;
        }
        @keyframes pulse {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: .5; transform: scale(0.8); }
        }

        /* === Section header === */
        .section-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 40px;
        }
        .section-title-wrap {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .title-bar {
            width: 4px;
            height: 26px;
            background: var(--clr-primary);
            border-radius: 4px;
        }
        .section-header h2 {
            font-size: 30px;
            font-weight: 700;
            color: var(--clr-primary-dark);
            margin: 0;
            line-height: 1.3;
        }
        .section-header.center {
            justify-content: center;
            text-align: center;
        }
        .more-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--clr-text-sub);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all .2s ease;
        }
        .more-link:hover {
            color: var(--clr-primary);
            gap: 10px;
        }
        .tag-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--clr-primary);
            background: rgba(46,107,230,0.1);
            border-radius: var(--radius-full);
            padding: 4px 14px;
            margin-bottom: 12px;
        }

        /* === 分类入口 === */
        .category-entry-section {
            background: var(--clr-bg);
        }
        .category-card {
            display: block;
            background: var(--clr-bg);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            transition: all .25s ease;
            height: 100%;
            position: relative;
            overflow: hidden;
        }
        .category-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: var(--clr-primary);
            opacity: 0;
            transition: opacity .25s ease;
        }
        .category-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: transparent;
        }
        .category-card:hover::before {
            opacity: 1;
        }
        .cat-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--clr-bg-alt);
            color: var(--clr-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 18px;
            transition: background .25s ease, color .25s ease;
        }
        .category-card:hover .cat-icon {
            background: var(--clr-primary);
            color: #fff;
        }
        .category-card h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--clr-primary-dark);
            margin-bottom: 8px;
        }
        .category-card p {
            font-size: 14px;
            color: var(--clr-text-sub);
            margin-bottom: 16px;
            line-height: 1.7;
        }
        .cat-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--clr-primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap .2s ease;
        }
        .category-card:hover .cat-link {
            gap: 10px;
        }

        /* === 爆款片段 === */
        .trending-section {
            background: var(--clr-bg-alt);
        }
        .trending-grid {
            columns: 4;
            column-gap: 24px;
        }
        .trending-card {
            break-inside: avoid;
            margin-bottom: 24px;
            background: var(--clr-bg);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: box-shadow .3s ease, transform .3s ease;
        }
        .trending-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .card-cover {
            overflow: hidden;
            aspect-ratio: 3 / 3.4;
            background: var(--clr-bg-soft);
        }
        .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .3s ease;
        }
        .trending-card:hover .card-cover img {
            transform: scale(1.03);
        }
        .trending-card .card-body {
            padding: 18px 20px 20px;
        }
        .trending-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--clr-text);
            line-height: 1.5;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .trending-card p {
            font-size: 14px;
            color: var(--clr-text-sub);
            line-height: 1.7;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .badge-soft {
            background: rgba(46,107,230,0.1);
            color: var(--clr-primary);
            font-size: 12px;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: var(--radius-full);
        }
        .badge-accent {
            background: rgba(15,163,163,0.12);
            color: var(--clr-accent);
        }
        .badge-warm {
            background: rgba(255,122,69,0.12);
            color: #d95f2b;
        }
        .views {
            font-size: 13px;
            color: var(--clr-text-muted);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* === 种草清单 === */
        .checklist-section {
            background: var(--clr-bg);
        }
        .checklist-layout {
            display: grid;
            grid-template-columns: 280px 1fr;
            gap: 48px;
        }
        .checklist-intro p {
            font-size: 14px;
            color: var(--clr-text-sub);
            line-height: 1.7;
            margin-top: 8px;
        }
        .checklist-list {
            display: flex;
            flex-direction: column;
        }
        .checklist-item {
            display: flex;
            align-items: center;
            padding: 18px 16px;
            border-bottom: 1px solid var(--clr-divider);
            transition: background .2s ease;
            border-radius: var(--radius-sm);
            cursor: pointer;
        }
        .checklist-item:first-child {
            border-top: 1px solid var(--clr-divider);
        }
        .checklist-item:hover {
            background: #F0F5FE;
        }
        .item-num {
            font-family: var(--font-num);
            font-size: 24px;
            font-weight: 500;
            color: var(--clr-primary);
            opacity: .6;
            width: 56px;
            flex-shrink: 0;
        }
        .item-text {
            flex: 1;
            min-width: 0;
        }
        .item-text h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--clr-text);
            margin-bottom: 2px;
        }
        .item-text p {
            font-size: 14px;
            color: var(--clr-text-sub);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            margin: 0;
        }
        .item-arrow {
            color: var(--clr-text-muted);
            font-size: 16px;
            transition: transform .2s ease, color .2s ease;
            flex-shrink: 0;
            margin-left: 12px;
        }
        .checklist-item:hover .item-arrow {
            transform: translateX(4px);
            color: var(--clr-primary);
        }

        /* === 用户口碑 === */
        .testimonials-section {
            background: #F4F7FB;
        }
        .testimonial-card {
            background: var(--clr-bg);
            border-radius: var(--radius-md);
            padding: 28px;
            box-shadow: var(--shadow-sm);
            height: 100%;
            transition: box-shadow .25s ease, transform .25s ease;
        }
        .testimonial-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .user-row {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }
        .avatar-circle {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--clr-bg-soft);
            color: var(--clr-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            flex-shrink: 0;
        }
        .user-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--clr-text);
            flex: 1;
        }
        .stars {
            color: #f5b50a;
            font-size: 13px;
            letter-spacing: 1px;
        }
        .comment-text {
            font-size: 14px;
            line-height: 1.8;
            color: var(--clr-text-sub);
            margin-bottom: 14px;
        }
        .comment-source {
            font-size: 13px;
            color: var(--clr-text-muted);
        }

        /* === CTA === */
        .cta-section {
            background: var(--clr-bg);
        }
        .cta-box {
            background: var(--clr-primary);
            border-radius: var(--radius-lg);
            padding: 56px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-box::before,
        .cta-box::after {
            content: "";
            position: absolute;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
        }
        .cta-box::before {
            width: 240px;
            height: 240px;
            top: -80px;
            left: -60px;
        }
        .cta-box::after {
            width: 160px;
            height: 160px;
            bottom: -50px;
            right: -30px;
        }
        .cta-box h2 {
            color: #fff;
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 8px;
            position: relative;
            z-index: 1;
        }
        .cta-box .btn-light {
            margin-top: 20px;
            background: #fff;
            border-color: #fff;
            color: var(--clr-primary);
            font-weight: 600;
            height: 44px;
            padding: 0 32px;
            border-radius: var(--radius-sm);
            position: relative;
            z-index: 1;
            transition: all .2s ease;
        }
        .cta-box .btn-light:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        }
        .cta-note {
            display: block;
            color: rgba(255, 255, 255, 0.8);
            font-size: 14px;
            margin-top: 12px;
            position: relative;
            z-index: 1;
        }

        /* === 最新资讯 === */
        .news-section {
            background: var(--clr-bg-alt);
        }
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .news-item {
            display: flex;
            align-items: center;
            background: var(--clr-bg);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            padding: 16px 24px;
            gap: 20px;
            transition: all .25s ease;
        }
        .news-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: var(--clr-primary);
        }
        .news-thumb {
            width: 80px;
            height: 80px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            background: var(--clr-bg-soft);
        }
        .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .news-content {
            flex: 1;
            min-width: 0;
        }
        .news-content h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--clr-text);
            margin-bottom: 4px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            transition: color .2s ease;
        }
        .news-item:hover .news-content h4 {
            color: var(--clr-primary);
        }
        .news-content p {
            font-size: 14px;
            color: var(--clr-text-sub);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin: 0;
        }
        .news-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }
        .news-meta .date {
            font-size: 13px;
            color: var(--clr-text-muted);
            white-space: nowrap;
        }
        .news-meta .arrow-icon {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--clr-bg-alt);
            color: var(--clr-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            transition: all .2s ease;
        }
        .news-item:hover .arrow-icon {
            background: var(--clr-primary);
            color: #fff;
            transform: translateX(2px);
        }
        .empty-state {
            border: 2px dashed var(--clr-border);
            border-radius: var(--radius-md);
            padding: 60px 20px;
            text-align: center;
            background: var(--clr-bg);
            color: var(--clr-text-muted);
        }
        .empty-state i {
            font-size: 36px;
            margin-bottom: 12px;
            color: var(--clr-text-muted);
            opacity: .5;
        }
        .empty-state p {
            font-size: 15px;
            margin: 0;
        }

        /* === FAQ 手风琴 === */
        .faq-section {
            background: var(--clr-bg);
        }
        .faq-accordion .accordion-item {
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: none;
        }
        .faq-accordion .accordion-button {
            background: var(--clr-bg);
            font-size: 15px;
            font-weight: 600;
            color: var(--clr-text);
            padding: 18px 24px;
            box-shadow: none;
            transition: background .2s ease, color .2s ease;
            border-radius: 0 !important;
        }
        .faq-accordion .accordion-button:hover {
            background: var(--clr-bg-alt);
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            background: var(--clr-bg-alt);
            color: var(--clr-primary);
            box-shadow: inset 3px 0 0 var(--clr-primary);
        }
        .faq-accordion .accordion-button::after {
            content: "\f067";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            background-image: none;
            color: var(--clr-text-muted);
            width: 16px;
            height: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform .2s ease;
        }
        .faq-accordion .accordion-button:not(.collapsed)::after {
            transform: rotate(45deg);
            color: var(--clr-primary);
        }
        .faq-accordion .accordion-body {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--clr-text-sub);
            line-height: 1.7;
            background: var(--clr-bg);
        }

        /* === 页脚 === */
        .site-footer {
            background: #1E2A3A;
            color: #A9B5C6;
            padding-top: 60px;
        }
        .footer-brand .brand-text {
            color: #fff;
        }
        .footer-brand .brand-icon {
            background: rgba(46,107,230,0.9);
        }
        .footer-brand-desc {
            font-size: 14px;
            line-height: 1.8;
            margin: 16px 0 20px;
            max-width: 300px;
        }
        .social-icons {
            display: flex;
            gap: 12px;
        }
        .social-icons a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #A9B5C6;
            font-size: 15px;
            transition: all .2s ease;
        }
        .social-icons a:hover {
            background: var(--clr-primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
            font-size: 14px;
        }
        .footer-col ul a {
            color: #A9B5C6;
            transition: color .2s ease;
        }
        .footer-col ul a:hover {
            color: #fff;
        }
        .footer-col ul li i {
            margin-right: 8px;
            color: var(--clr-text-muted);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 22px 0;
            margin-top: 48px;
            text-align: center;
            font-size: 13px;
            color: rgba(255,255,255,0.4);
        }

        /* === 响应式 === */
        @media (max-width: 1199px) {
            .trending-grid {
                columns: 2;
            }
            .command-search {
                width: 180px;
            }
            .command-search:focus-within {
                width: 220px;
            }
        }

        @media (max-width: 991px) {
            .custom-navbar {
                height: auto;
                min-height: 64px;
                padding: 10px 16px;
            }
            .custom-navbar .navbar-brand {
                margin-right: 0;
            }
            .custom-navbar .navbar-collapse {
                margin-top: 10px;
                padding-bottom: 14px;
                border-top: 1px solid var(--clr-divider);
                padding-top: 10px;
            }
            .custom-navbar .navbar-nav {
                gap: 0;
                align-items: flex-start;
            }
            .custom-navbar .nav-link {
                line-height: 40px;
                padding: 0 12px !important;
                width: 100%;
            }
            .custom-navbar .nav-link::after {
                bottom: auto;
                top: 50%;
                left: 0;
                right: auto;
                transform: translateY(-50%);
                width: 3px;
                height: 20px;
            }
            .custom-navbar .nav-link.active::after,
            .custom-navbar .nav-link:hover::after {
                left: 0;
                right: auto;
            }
            .nav-actions {
                flex-wrap: wrap;
                gap: 12px;
                padding: 12px;
                background: var(--clr-bg-alt);
                border-radius: var(--radius-md);
            }
            .command-search {
                width: 100%;
                max-width: 220px;
            }
            .command-search:focus-within {
                width: 100%;
                max-width: 300px;
            }
            .btn-cta {
                width: auto;
            }
        }

        @media (max-width: 767px) {
            .section-padding {
                padding: 48px 0;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .hero-section {
                padding: 48px 0;
                min-height: auto;
            }
            .hero-content h1 {
                font-size: 30px;
            }
            .hero-subtitle {
                font-size: 16px;
            }
            .hero-actions .btn-lg {
                width: 100%;
            }
            .hero-features {
                gap: 12px;
            }
            .hero-visual {
                order: 2;
                margin-top: 30px;
            }
            .phone-mockup {
                width: 240px;
                height: 480px;
            }
            .login-status {
                right: 10px;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .section-header {
                margin-bottom: 28px;
            }
            .trending-grid {
                columns: 1;
            }
            .checklist-layout {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .checklist-item {
                padding: 14px 8px;
            }
            .item-num {
                font-size: 20px;
                width: 44px;
            }
            .cta-box {
                padding: 40px 20px;
            }
            .cta-box h2 {
                font-size: 24px;
            }
            .news-item {
                flex-direction: column;
                align-items: flex-start;
                padding: 16px;
                gap: 12px;
            }
            .news-thumb {
                width: 100%;
                height: 160px;
            }
            .news-meta {
                width: 100%;
                justify-content: space-between;
            }
            .footer-grid .footer-brand,
            .footer-grid .footer-col {
                margin-bottom: 32px;
            }
        }

        @media (max-width: 520px) {
            .hero-content h1 {
                font-size: 27px;
            }
            .hero-actions .btn-lg {
                height: 44px;
                font-size: 14px;
            }
            .section-title-wrap {
                gap: 8px;
            }
            .section-header h2 {
                font-size: 22px;
            }
            .title-bar {
                height: 22px;
            }
            .more-link {
                font-size: 13px;
            }
            .category-card {
                padding: 24px 20px;
            }
            .cta-box .btn-light {
                width: 100%;
            }
            .news-content p {
                -webkit-line-clamp: 2;
            }
        }

/* roulang page: category1 */
:root {
            --clr-primary: #2E6BE6;
            --clr-primary-dark: #1A3F7A;
            --clr-accent: #0FA3A3;
            --clr-cta: #FF7A45;
            --clr-bg: #FFFFFF;
            --clr-bg-alt: #F5F8FD;
            --clr-bg-soft: #EDF2FA;
            --clr-text: #1E2A3A;
            --clr-text-sub: #5A6B80;
            --clr-text-muted: #98A8BC;
            --clr-border: #E2E9F2;
            --clr-divider: #EAF0F6;
            --shadow-sm: 0 4px 16px rgba(30, 42, 58, 0.06);
            --shadow-md: 0 8px 24px rgba(30, 42, 58, 0.12);
            --shadow-lg: 0 16px 40px rgba(30, 42, 58, 0.16);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-pill: 999px;
            --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Alibaba PuHuiTi", sans-serif;
            --font-num: "Inter", "SF Pro Display", "Roboto", sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-main);
            font-size: 16px;
            line-height: 1.75;
            color: var(--clr-text);
            background: var(--clr-bg);
            margin: 0;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--clr-primary);
            text-decoration: none;
            transition: color .2s ease;
        }

        a:hover {
            color: var(--clr-primary-dark);
        }

        img {
            max-width: 100%;
            height: auto;
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        @media (max-width: 767px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ===================== 导航 ===================== */
        .site-header {
            background: #fff;
            border-bottom: 1px solid var(--clr-border);
            height: 64px;
            position: sticky;
            top: 0;
            z-index: 1050;
        }

        .custom-navbar {
            height: 64px;
            padding: 0 24px;
        }

        .custom-navbar .container-fluid {
            padding: 0;
            max-width: 1320px;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0;
            margin: 0;
        }

        .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--clr-primary);
            color: #fff;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            flex-shrink: 0;
        }

        .brand-text {
            font-family: var(--font-num);
            font-size: 20px;
            font-weight: 700;
            color: var(--clr-primary-dark);
            letter-spacing: -0.2px;
        }

        .custom-navbar .navbar-nav {
            gap: 28px;
        }

        .custom-navbar .nav-link {
            font-size: 14.5px;
            font-weight: 500;
            color: var(--clr-text);
            padding: 8px 0;
            position: relative;
            white-space: nowrap;
        }

        .custom-navbar .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 2px;
            background: var(--clr-primary);
            border-radius: 2px;
            transform: scaleX(0);
            transform-origin: left center;
            transition: transform .2s ease;
        }

        .custom-navbar .nav-link:hover {
            color: var(--clr-primary);
        }

        .custom-navbar .nav-link:hover::after {
            transform: scaleX(1);
        }

        .custom-navbar .nav-link.active {
            color: var(--clr-primary-dark);
            font-weight: 600;
        }

        .custom-navbar .nav-link.active::after {
            transform: scaleX(1);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .command-search {
            position: relative;
            width: 220px;
            transition: width .25s ease;
        }

        .command-search:focus-within {
            width: 300px;
        }

        .command-search .fa-magnifying-glass {
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 13px;
            color: var(--clr-text-muted);
            pointer-events: none;
        }

        .command-search input {
            width: 100%;
            height: 36px;
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-pill);
            padding: 0 48px 0 36px;
            font-size: 13.5px;
            color: var(--clr-text);
            background: var(--clr-bg);
            outline: none;
            transition: border-color .2s, box-shadow .2s;
        }

        .command-search input:focus {
            border-color: var(--clr-primary);
            box-shadow: 0 0 0 4px rgba(46, 107, 230, 0.12);
        }

        .command-search input::placeholder {
            color: var(--clr-text-muted);
        }

        .command-search .kbd {
            position: absolute;
            right: 12px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 11px;
            font-family: var(--font-num);
            color: var(--clr-text-muted);
            background: var(--clr-bg-alt);
            border: 1px solid var(--clr-border);
            border-radius: 4px;
            padding: 1px 6px;
            pointer-events: none;
        }

        .nav-login,
        .nav-register {
            font-size: 14px;
            font-weight: 500;
            color: var(--clr-text);
        }

        .nav-login:hover,
        .nav-register:hover {
            color: var(--clr-primary);
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 36px;
            padding: 0 20px;
            background: var(--clr-primary);
            color: #fff !important;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-pill);
            border: none;
            transition: transform .2s, box-shadow .2s, background .2s;
            white-space: nowrap;
        }

        .btn-cta:hover {
            background: #4d7ee9;
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }

        .navbar-toggler {
            border: none;
            padding: 0;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .navbar-toggler-icon {
            background-image: none !important;
            width: 22px;
            height: 2px;
            background: var(--clr-text);
            border-radius: 2px;
            position: relative;
            display: block;
            transition: background .2s;
        }

        .navbar-toggler-icon::before,
        .navbar-toggler-icon::after {
            content: "";
            position: absolute;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--clr-text);
            border-radius: 2px;
            transition: transform .2s;
        }

        .navbar-toggler-icon::before {
            top: -7px;
        }

        .navbar-toggler-icon::after {
            top: 7px;
        }

        .navbar-toggler[aria-expanded="true"] .navbar-toggler-icon {
            background: transparent;
        }

        .navbar-toggler[aria-expanded="true"] .navbar-toggler-icon::before {
            transform: translateY(7px) rotate(45deg);
        }

        .navbar-toggler[aria-expanded="true"] .navbar-toggler-icon::after {
            transform: translateY(-7px) rotate(-45deg);
        }

        @media (max-width: 1199.98px) {
            .command-search {
                width: 170px;
            }
            .command-search:focus-within {
                width: 220px;
            }
            .custom-navbar .navbar-nav {
                gap: 20px;
            }
        }

        @media (max-width: 991.98px) {
            .site-header {
                height: auto;
            }
            .custom-navbar {
                height: auto;
                padding: 12px 16px;
            }
            .custom-navbar .container-fluid {
                flex-wrap: wrap;
            }
            .navbar-collapse {
                margin-top: 12px;
                padding: 20px;
                border: 1px solid var(--clr-border);
                border-radius: var(--radius-md);
                background: #fff;
                box-shadow: var(--shadow-md);
            }
            .custom-navbar .navbar-nav {
                gap: 4px;
                width: 100%;
            }
            .custom-navbar .nav-link {
                padding: 10px 0;
                font-size: 15px;
            }
            .custom-navbar .nav-link::after {
                display: none;
            }
            .nav-actions {
                flex-wrap: wrap;
                width: 100%;
                gap: 12px;
                margin-top: 16px;
                padding-top: 16px;
                border-top: 1px solid var(--clr-divider);
            }
            .command-search,
            .command-search:focus-within {
                width: 100%;
            }
            .nav-login,
            .nav-register {
                margin-left: 0;
            }
            .btn-cta {
                margin-left: auto;
            }
        }

        /* ===================== 通用板块标题 ===================== */
        .section-head {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 40px;
        }

        .section-head .bar {
            width: 4px;
            height: 24px;
            border-radius: 2px;
            background: var(--clr-primary);
        }

        .section-head h2 {
            font-size: 30px;
            font-weight: 700;
            color: var(--clr-primary-dark);
            margin: 0;
            letter-spacing: -0.3px;
        }

        .section-head .more-link {
            margin-left: auto;
            font-size: 14px;
            color: var(--clr-text-sub);
            font-weight: 500;
        }

        .section-head .more-link i {
            transition: transform .2s;
        }

        .section-head .more-link:hover i {
            transform: translateX(4px);
        }

        @media (max-width: 767px) {
            .section-head h2 {
                font-size: 23px;
            }
            .section-head {
                margin-bottom: 28px;
            }
        }

        /* ===================== 分类页 Hero ===================== */
        .category-hero {
            position: relative;
            padding: 72px 0 56px;
            background: linear-gradient(180deg, var(--clr-bg-soft) 0%, #f8fbfe 100%);
            border-bottom: 1px solid var(--clr-border);
            overflow: hidden;
        }

        .category-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: .3;
            pointer-events: none;
        }

        .category-hero .container {
            position: relative;
            z-index: 1;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 500;
            color: var(--clr-primary);
            background: rgba(46, 107, 230, .08);
            padding: 4px 14px;
            border-radius: var(--radius-pill);
            margin-bottom: 20px;
        }

        .category-hero h1 {
            font-size: 36px;
            font-weight: 800;
            color: var(--clr-primary-dark);
            line-height: 1.3;
            margin: 0 0 14px;
            letter-spacing: -0.5px;
        }

        .category-hero p.lead {
            font-size: 16px;
            color: var(--clr-text-sub);
            max-width: 640px;
            margin: 0;
            line-height: 1.8;
        }

        .hero-divider {
            width: 64px;
            height: 2px;
            background: var(--clr-primary);
            border-radius: 2px;
            margin-top: 28px;
        }

        @media (max-width: 767px) {
            .category-hero {
                padding: 48px 0 40px;
            }
            .category-hero h1 {
                font-size: 28px;
            }
            .category-hero p.lead {
                font-size: 15px;
            }
        }

        /* ===================== 登录方式卡片 ===================== */
        .login-methods {
            padding: 90px 0;
        }

        .method-large {
            background: #fff;
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: box-shadow .3s, transform .3s;
            height: 100%;
        }

        .method-large:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .method-large .cover-wrap {
            height: 260px;
            overflow: hidden;
        }

        .method-large .cover-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .3s ease;
        }

        .method-large:hover .cover-wrap img {
            transform: scale(1.03);
        }

        .method-large .method-body {
            padding: 28px;
        }

        .method-large .method-body h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--clr-primary-dark);
            margin-bottom: 10px;
        }

        .method-large .method-body p {
            font-size: 14.5px;
            color: var(--clr-text-sub);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .method-small {
            background: #fff;
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            transition: box-shadow .3s, transform .3s;
            height: 100%;
        }

        .method-small:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .method-small .method-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            margin-bottom: 16px;
            background: rgba(15, 163, 163, .1);
            color: var(--clr-accent);
        }

        .method-small h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--clr-primary-dark);
            margin-bottom: 8px;
        }

        .method-small p {
            font-size: 13.5px;
            color: var(--clr-text-sub);
            line-height: 1.7;
            margin: 0;
        }

        .method-badge {
            display: inline-block;
            font-size: 12px;
            font-weight: 500;
            padding: 2px 12px;
            border-radius: var(--radius-pill);
            background: rgba(255, 122, 69, .1);
            color: var(--clr-cta);
            margin-bottom: 10px;
        }

        /* ===================== 适用场景 ===================== */
        .scenarios {
            padding: 90px 0;
            background: var(--clr-bg-alt);
        }

        .scenario-card {
            background: #fff;
            border-radius: var(--radius-md);
            padding: 28px;
            border: 1px solid var(--clr-border);
            box-shadow: var(--shadow-sm);
            transition: box-shadow .3s, transform .3s;
            height: 100%;
            position: relative;
            overflow: hidden;
        }

        .scenario-card::before {
            content: "";
            position: absolute;
            left: 0;
            top: 0;
            width: 3px;
            height: 100%;
            background: var(--clr-primary);
            opacity: 0;
            transition: opacity .2s;
        }

        .scenario-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .scenario-card:hover::before {
            opacity: 1;
        }

        .scenario-card .scenario-num {
            font-family: var(--font-num);
            font-size: 28px;
            font-weight: 700;
            color: rgba(46, 107, 230, .35);
            line-height: 1;
            margin-bottom: 14px;
        }

        .scenario-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--clr-primary-dark);
            margin-bottom: 8px;
        }

        .scenario-card p {
            font-size: 14px;
            color: var(--clr-text-sub);
            line-height: 1.75;
            margin: 0;
        }

        /* ===================== 登录流程 ===================== */
        .process {
            padding: 90px 0;
        }

        .process-step {
            text-align: center;
            padding: 0 16px;
            position: relative;
        }

        .process-step .step-circle {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--clr-bg-alt);
            border: 2px solid var(--clr-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-num);
            font-size: 22px;
            font-weight: 700;
            color: var(--clr-primary);
            margin: 0 auto 18px;
        }

        .process-step .step-line {
            position: absolute;
            top: 32px;
            left: calc(50% + 48px);
            width: calc(100% - 96px);
            height: 2px;
            background: var(--clr-divider);
        }

        .process-step:last-child .step-line {
            display: none;
        }

        .process-step h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--clr-primary-dark);
            margin-bottom: 6px;
        }

        .process-step p {
            font-size: 13.5px;
            color: var(--clr-text-sub);
            line-height: 1.7;
            margin: 0;
            max-width: 200px;
            margin-left: auto;
            margin-right: auto;
        }

        @media (max-width: 991.98px) {
            .process-step .step-line {
                display: none;
            }
        }

        /* ===================== 安全体验 ===================== */
        .security {
            padding: 90px 0;
            background: var(--clr-bg-alt);
        }

        .security-card {
            background: #fff;
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            padding: 28px;
            box-shadow: var(--shadow-sm);
            transition: box-shadow .3s;
            height: 100%;
        }

        .security-card:hover {
            box-shadow: var(--shadow-md);
        }

        .security-card .sec-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(46, 107, 230, .1);
            color: var(--clr-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            margin-bottom: 14px;
        }

        .security-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--clr-primary-dark);
            margin-bottom: 8px;
        }

        .security-card p {
            font-size: 14px;
            color: var(--clr-text-sub);
            line-height: 1.75;
            margin: 0;
        }

        /* ===================== FAQ ===================== */
        .faq-section {
            padding: 90px 0;
        }

        .faq-accordion .accordion-item {
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md) !important;
            margin-bottom: 10px;
            background: #fff;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }

        .faq-accordion .accordion-button {
            background: transparent;
            font-size: 15px;
            font-weight: 600;
            color: var(--clr-text);
            padding: 18px 24px;
            box-shadow: none;
            border: none;
            position: relative;
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            color: var(--clr-primary-dark);
            background: rgba(46, 107, 230, .03);
        }

        .faq-accordion .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(46, 107, 230, .08);
            border-radius: var(--radius-md);
        }

        .faq-accordion .accordion-button::after {
            background-image: none;
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            content: "\2b";
            font-size: 16px;
            color: var(--clr-primary);
            width: auto;
            height: auto;
            transition: transform .2s;
        }

        .faq-accordion .accordion-button:not(.collapsed)::after {
            transform: rotate(45deg);
        }

        .faq-accordion .accordion-body {
            font-size: 14px;
            color: var(--clr-text-sub);
            line-height: 1.75;
            padding: 4px 24px 20px;
            background: #fff;
            border-top: 1px solid var(--clr-divider);
            margin-top: 8px;
        }

        /* ===================== CTA ===================== */
        .cat-cta {
            padding: 70px 0 90px;
        }

        .cta-box {
            background: var(--clr-bg-alt);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-lg);
            padding: 48px 56px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }

        .cta-box h3 {
            font-size: 24px;
            font-weight: 700;
            color: var(--clr-primary-dark);
            margin: 0 0 6px;
        }

        .cta-box p {
            font-size: 14.5px;
            color: var(--clr-text-sub);
            margin: 0;
        }

        .btn-outline-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            height: 42px;
            padding: 0 24px;
            border: 1px solid var(--clr-primary);
            color: var(--clr-primary);
            background: transparent;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: background .2s, transform .2s, box-shadow .2s;
        }

        .btn-outline-primary-custom:hover {
            background: rgba(46, 107, 230, .08);
            color: var(--clr-primary);
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
        }

        /* ===================== 页脚 ===================== */
        .site-footer {
            background: #fff;
            border-top: 1px solid var(--clr-border);
            padding-top: 64px;
        }

        .footer-grid {
            margin-bottom: 40px;
        }

        .footer-brand .navbar-brand {
            margin-bottom: 14px;
        }

        .footer-brand-desc {
            font-size: 13.5px;
            color: var(--clr-text-muted);
            line-height: 1.7;
            margin: 0 0 18px;
            max-width: 300px;
        }

        .social-icons {
            display: flex;
            gap: 12px;
        }

        .social-icons a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid var(--clr-border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--clr-text-muted);
            font-size: 14px;
            transition: background .2s, color .2s, border-color .2s;
        }

        .social-icons a:hover {
            background: var(--clr-bg-alt);
            color: var(--clr-primary);
            border-color: var(--clr-primary);
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--clr-primary-dark);
            margin-bottom: 16px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 10px;
            font-size: 14px;
            color: var(--clr-text-sub);
        }

        .footer-col ul li a {
            color: var(--clr-text-sub);
            font-size: 14px;
            transition: color .2s;
        }

        .footer-col ul li a:hover {
            color: var(--clr-primary);
        }

        .footer-col ul li i {
            width: 20px;
            color: var(--clr-primary);
            margin-right: 4px;
        }

        .footer-bottom {
            border-top: 1px solid var(--clr-divider);
            padding: 20px 0;
        }

        .footer-bottom .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .footer-bottom span {
            font-size: 13px;
            color: var(--clr-text-muted);
        }

        @media (max-width: 767px) {
            .footer-grid {
                row-gap: 32px;
            }
            .footer-bottom .container {
                flex-wrap: wrap;
                gap: 8px;
            }
            .cta-box {
                padding: 32px 24px;
                flex-direction: column;
                align-items: flex-start;
            }
        }

        /* ===================== 响应式补充 ===================== */
        @media (max-width: 767px) {
            .login-methods,
            .scenarios,
            .process,
            .security,
            .faq-section {
                padding: 56px 0;
            }
            .cat-cta {
                padding: 40px 0 56px;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .method-large .cover-wrap {
                height: 200px;
            }
            .btn-cta.mobile-full {
                width: 100%;
                height: 44px;
            }
        }

        @media (min-width: 768px) and (max-width: 991.98px) {
            .method-small {
                margin-bottom: 0;
            }
        }

/* roulang page: article */
:root {
            --clr-primary: #2E6BE6;
            --clr-primary-dark: #1A3F7A;
            --clr-accent: #0FA3A3;
            --clr-cta: #FF7A45;
            --clr-bg: #FFFFFF;
            --clr-bg-alt: #F5F8FD;
            --clr-bg-soft: #EDF2FA;
            --clr-text: #1E2A3A;
            --clr-text-sub: #5A6B80;
            --clr-text-muted: #98A8BC;
            --clr-border: #E2E9F2;
            --clr-divider: #EAF0F6;
            --shadow-sm: 0 4px 16px rgba(30,42,58,0.06);
            --shadow-md: 0 8px 24px rgba(30,42,58,0.12);
            --shadow-lg: 0 16px 40px rgba(30,42,58,0.16);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Alibaba PuHuiTi", sans-serif;
            --font-num: "Inter", "SF Pro Display", "Roboto", sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        body {
            margin: 0;
            font-family: var(--font-cn);
            font-size: 16px;
            line-height: 1.7;
            color: var(--clr-text);
            background: var(--clr-bg);
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
        }
        a {
            text-decoration: none;
            transition: color .2s ease;
        }
        a:hover {
            text-decoration: none;
        }
        button,
        input,
        optgroup,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--clr-border);
        }
        .custom-navbar {
            padding: 0 24px;
            min-height: 64px;
            background: transparent;
        }
        .custom-navbar .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            color: var(--clr-primary-dark);
            font-size: 20px;
            letter-spacing: .5px;
            padding: 0;
        }
        .brand-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            box-shadow: var(--shadow-sm);
        }
        .brand-text {
            font-weight: 700;
        }
        .custom-navbar .navbar-nav .nav-link {
            padding: 8px 4px;
            margin: 0 14px;
            font-size: 14.5px;
            font-weight: 500;
            color: var(--clr-text);
            position: relative;
            background: transparent;
            transition: color .2s ease;
        }
        .custom-navbar .navbar-nav .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background: var(--clr-primary);
            border-radius: 2px;
            transition: width .2s ease;
        }
        .custom-navbar .navbar-nav .nav-link:hover {
            color: var(--clr-primary);
        }
        .custom-navbar .navbar-nav .nav-link:hover::after {
            width: 60%;
        }
        .custom-navbar .navbar-nav .nav-link.active {
            color: var(--clr-primary);
            font-weight: 600;
        }
        .custom-navbar .navbar-nav .nav-link.active::after {
            width: 100%;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .command-search {
            position: relative;
            background: #fff;
            border: 1px solid var(--clr-border);
            border-radius: 999px;
            height: 36px;
            display: flex;
            align-items: center;
            padding: 0 12px;
            width: 220px;
            transition: width .2s ease, border-color .2s ease, box-shadow .2s ease;
        }
        .command-search .fa-magnifying-glass {
            color: var(--clr-text-muted);
            font-size: 14px;
            flex-shrink: 0;
        }
        .command-search input {
            border: none;
            outline: none;
            background: transparent;
            font-size: 14px;
            color: var(--clr-text);
            flex: 1;
            padding: 0 8px;
            min-width: 0;
        }
        .command-search input::placeholder {
            color: var(--clr-text-muted);
        }
        .command-search .kbd {
            font-size: 11px;
            color: var(--clr-text-muted);
            background: var(--clr-bg-soft);
            border-radius: 4px;
            padding: 2px 6px;
            font-family: var(--font-num);
            flex-shrink: 0;
        }
        .command-search:focus-within {
            width: 300px;
            border-color: var(--clr-primary);
            box-shadow: 0 0 0 4px rgba(46, 107, 230, 0.12);
        }
        .search-popover {
            position: absolute;
            top: calc(100% + 8px);
            left: 0;
            width: 270px;
            background: #fff;
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            padding: 16px;
            display: none;
            z-index: 100;
        }
        .command-search:focus-within .search-popover {
            display: block;
        }
        .popover-label {
            display: block;
            font-size: 12px;
            color: var(--clr-text-muted);
            margin-bottom: 10px;
            font-weight: 500;
        }
        .tag-item {
            display: inline-block;
            padding: 4px 12px;
            background: var(--clr-bg-alt);
            color: var(--clr-text-sub);
            border-radius: 999px;
            font-size: 12px;
            margin: 0 8px 8px 0;
            cursor: default;
        }
        .nav-login,
        .nav-register {
            font-size: 14px;
            color: var(--clr-text-sub);
            font-weight: 500;
            transition: color .2s ease;
            white-space: nowrap;
        }
        .nav-login:hover,
        .nav-register:hover {
            color: var(--clr-primary);
        }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 36px;
            padding: 0 20px;
            background: var(--clr-primary);
            color: #fff;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all .25s ease;
            white-space: nowrap;
        }
        .btn-cta:hover {
            background: var(--clr-primary-dark);
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
            color: #fff;
        }
        .btn-cta:active {
            transform: translateY(0);
        }
        .navbar-toggler {
            border: 1px solid var(--clr-border);
            border-radius: 8px;
            padding: 6px 10px;
            background: transparent;
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(46, 107, 230, 0.15);
            outline: none;
        }
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg viewBox='0 0 30 30' xmlns='http://www.w3.org/2000/svg'%3e%3cpath stroke='rgba(30,42,58,0.8)' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
            width: 20px;
            height: 20px;
        }
        @media (max-width: 991px) {
            .custom-navbar {
                padding: 12px 16px;
            }
            .custom-navbar .navbar-collapse {
                background: #fff;
                padding: 20px;
                border-radius: var(--radius-md);
                box-shadow: var(--shadow-md);
                border: 1px solid var(--clr-border);
                margin-top: 12px;
            }
            .custom-navbar .navbar-nav .nav-link {
                padding: 12px 0;
                margin: 0;
                border-bottom: 1px solid var(--clr-divider);
            }
            .custom-navbar .navbar-nav .nav-link::after {
                display: none;
            }
            .nav-actions {
                flex-wrap: wrap;
                gap: 12px;
                padding-top: 16px;
            }
            .command-search {
                width: 100%;
                max-width: 100%;
            }
            .command-search:focus-within {
                width: 100%;
            }
            .btn-cta {
                flex: 1;
            }
        }
        .article-main {
            min-height: 60vh;
        }
        .article-cover-band {
            background: var(--clr-bg-alt);
            padding: 40px 0 0;
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--clr-border);
        }
        .article-cover-band::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.05;
            pointer-events: none;
        }
        .breadcrumb-custom {
            padding: 24px 0 20px;
            font-size: 13px;
            color: var(--clr-text-muted);
            position: relative;
            z-index: 1;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
        }
        .breadcrumb-custom a {
            color: var(--clr-text-muted);
            transition: color .2s ease;
        }
        .breadcrumb-custom a:hover {
            color: var(--clr-primary);
        }
        .breadcrumb-custom .sep {
            padding: 0 6px;
            color: var(--clr-text-muted);
        }
        .breadcrumb-custom .current {
            color: var(--clr-primary-dark);
            font-weight: 500;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            max-width: 380px;
        }
        .article-header {
            padding: 8px 0 40px;
            position: relative;
            z-index: 1;
        }
        .article-header h1 {
            font-size: 32px;
            font-weight: 700;
            color: var(--clr-primary-dark);
            line-height: 1.4;
            margin-bottom: 20px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px;
            font-size: 14px;
            color: var(--clr-text-muted);
            padding-bottom: 24px;
            border-bottom: 1px solid var(--clr-divider);
        }
        .article-meta .meta-item {
            display: inline-flex;
            align-items: center;
        }
        .article-meta .meta-item i {
            margin-right: 6px;
            color: var(--clr-text-muted);
            font-size: 13px;
        }
        .category-badge {
            display: inline-block;
            padding: 4px 14px;
            background: rgba(15, 163, 163, 0.1);
            color: var(--clr-accent);
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            margin-left: auto;
        }
        .article-content-wrap {
            background: #fff;
        }
        .article-body {
            max-width: 780px;
            margin: 0 auto;
            padding: 56px 0 72px;
            font-size: 16px;
            line-height: 1.8;
            color: var(--clr-text);
            word-break: break-word;
        }
        .article-body p {
            margin: 0 0 18px;
        }
        .article-body h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--clr-primary-dark);
            margin: 36px 0 16px;
            line-height: 1.5;
        }
        .article-body h4 {
            font-size: 17px;
            font-weight: 600;
            color: var(--clr-primary-dark);
            margin: 28px 0 12px;
            line-height: 1.5;
        }
        .article-body img {
            max-width: 100%;
            border-radius: var(--radius-sm);
            margin: 20px 0;
            display: block;
            height: auto;
        }
        .article-body a {
            color: var(--clr-primary);
            text-decoration: none;
            border-bottom: 1px solid transparent;
            transition: border-color .2s ease;
        }
        .article-body a:hover {
            border-bottom-color: var(--clr-primary);
        }
        .article-body ul,
        .article-body ol {
            margin: 0 0 18px;
            padding-left: 24px;
        }
        .article-body li {
            margin: 8px 0;
        }
        .article-body blockquote {
            border-left: 3px solid var(--clr-primary);
            background: var(--clr-bg-alt);
            padding: 14px 20px;
            margin: 24px 0;
            border-radius: 0 8px 8px 0;
            color: var(--clr-text-sub);
            font-style: normal;
        }
        .article-body strong {
            font-weight: 600;
            color: var(--clr-primary-dark);
        }
        .not-found {
            max-width: 780px;
            margin: 40px auto 80px;
            padding: 80px 40px;
            text-align: center;
            background: var(--clr-bg-alt);
            border: 1px dashed var(--clr-border);
            border-radius: var(--radius-md);
            color: var(--clr-text-sub);
        }
        .nf-icon {
            font-size: 52px;
            color: var(--clr-text-muted);
            margin-bottom: 20px;
            display: block;
        }
        .not-found h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--clr-primary-dark);
            margin-bottom: 12px;
        }
        .not-found p {
            font-size: 15px;
            margin-bottom: 24px;
            color: var(--clr-text-muted);
        }
        .not-found .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border: 1px solid var(--clr-primary);
            border-radius: var(--radius-sm);
            background: var(--clr-primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            transition: all .2s ease;
        }
        .not-found .btn-back:hover {
            background: var(--clr-primary-dark);
            border-color: var(--clr-primary-dark);
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
        }
        .related-section {
            background: var(--clr-bg-alt);
            padding: 72px 0 72px;
            border-top: 1px solid var(--clr-border);
        }
        .related-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 36px;
        }
        .related-head h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--clr-primary-dark);
            margin: 0;
            display: flex;
            align-items: center;
        }
        .heading-bar {
            display: inline-block;
            width: 4px;
            height: 22px;
            background: var(--clr-primary);
            border-radius: 2px;
            margin-right: 12px;
        }
        .more-link {
            font-size: 14px;
            color: var(--clr-primary);
            font-weight: 500;
            transition: color .2s ease;
        }
        .more-link:hover {
            color: var(--clr-primary-dark);
        }
        .more-link i {
            transition: transform .2s ease;
            margin-left: 4px;
        }
        .more-link:hover i {
            transform: translateX(4px);
        }
        .related-card {
            display: block;
            background: #fff;
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            height: 100%;
            box-shadow: var(--shadow-sm);
            transition: all .25s ease;
            color: var(--clr-text);
        }
        .related-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            color: var(--clr-text);
        }
        .related-cover {
            height: 165px;
            overflow: hidden;
            background: var(--clr-bg-soft);
        }
        .related-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .3s ease;
        }
        .related-card:hover .related-cover img {
            transform: scale(1.04);
        }
        .related-info {
            padding: 18px 20px;
        }
        .related-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--clr-text);
            margin: 0 0 10px;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            min-height: 45px;
        }
        .related-date {
            font-size: 13px;
            color: var(--clr-text-muted);
            display: inline-flex;
            align-items: center;
        }
        .related-date i {
            margin-right: 6px;
            font-size: 12px;
        }
        .back-wrap {
            text-align: center;
            margin-top: 48px;
        }
        .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 26px;
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-sm);
            background: #fff;
            color: var(--clr-text-sub);
            font-size: 14px;
            font-weight: 500;
            transition: all .2s ease;
        }
        .btn-back:hover {
            border-color: var(--clr-primary);
            color: var(--clr-primary);
            background: rgba(46, 107, 230, 0.04);
            transform: translateY(-1px);
        }
        .site-footer {
            background: var(--clr-bg-alt);
            border-top: 1px solid var(--clr-border);
            padding: 70px 0 0;
            margin-top: 0;
        }
        .footer-grid {
            padding-bottom: 48px;
        }
        .footer-brand .navbar-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            color: var(--clr-primary-dark);
            font-size: 20px;
            padding: 0;
            margin: 0 0 18px;
        }
        .footer-brand-desc {
            font-size: 14px;
            color: var(--clr-text-muted);
            line-height: 1.7;
            margin: 0 0 20px;
            max-width: 280px;
        }
        .social-icons {
            display: flex;
            gap: 12px;
        }
        .social-icons a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: #fff;
            border: 1px solid var(--clr-border);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--clr-text-muted);
            font-size: 14px;
            transition: all .2s ease;
        }
        .social-icons a:hover {
            background: var(--clr-primary);
            color: #fff;
            border-color: var(--clr-primary);
            transform: translateY(-2px);
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--clr-primary-dark);
            margin-bottom: 18px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 12px;
            font-size: 14px;
            color: var(--clr-text-sub);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .footer-col ul li a {
            color: var(--clr-text-sub);
            transition: color .2s ease;
        }
        .footer-col ul li a:hover {
            color: var(--clr-primary);
        }
        .footer-col ul li i {
            color: var(--clr-text-muted);
            font-size: 13px;
            width: 16px;
            text-align: center;
            flex-shrink: 0;
        }
        .footer-bottom {
            border-top: 1px solid var(--clr-divider);
            padding: 18px 0;
            text-align: center;
        }
        .footer-bottom span {
            font-size: 13px;
            color: var(--clr-text-muted);
        }
        @media (max-width: 767px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .article-cover-band {
                padding: 20px 0 0;
            }
            .article-header h1 {
                font-size: 26px;
                line-height: 1.45;
            }
            .article-meta {
                gap: 10px;
                font-size: 13px;
            }
            .category-badge {
                margin-left: 0;
            }
            .article-body {
                padding: 36px 0 48px;
                font-size: 15px;
                line-height: 1.75;
            }
            .article-body h3 {
                font-size: 18px;
                margin: 28px 0 12px;
            }
            .article-body h4 {
                font-size: 16px;
            }
            .breadcrumb-custom .current {
                max-width: 200px;
            }
            .related-section {
                padding: 48px 0 48px;
            }
            .related-head {
                flex-direction: row;
                align-items: center;
                margin-bottom: 24px;
            }
            .related-head h2 {
                font-size: 22px;
            }
            .related-cover {
                height: 160px;
            }
            .not-found {
                margin: 24px auto 48px;
                padding: 48px 20px;
            }
            .site-footer {
                padding: 48px 0 0;
            }
            .footer-col {
                margin-bottom: 28px;
            }
        }
        @media (max-width: 520px) {
            .nav-actions .nav-login,
            .nav-actions .nav-register {
                font-size: 13px;
            }
            .btn-cta {
                font-size: 13px;
                padding: 0 14px;
                height: 36px;
            }
            .article-header h1 {
                font-size: 24px;
            }
            .article-meta .meta-item {
                font-size: 12px;
            }
            .related-title {
                font-size: 14px;
            }
            .breadcrumb-custom {
                font-size: 12px;
            }
            .breadcrumb-custom .current {
                max-width: 150px;
            }
        }

/* roulang page: category2 */
:root {
            --clr-primary: #2E6BE6;
            --clr-primary-dark: #1A3F7A;
            --clr-primary-light: #3B7BF0;
            --clr-accent: #0FA3A3;
            --clr-cta: #FF7A45;
            --clr-bg: #FFFFFF;
            --clr-bg-alt: #F5F8FD;
            --clr-bg-soft: #EDF2FA;
            --clr-text: #1E2A3A;
            --clr-text-sub: #5A6B80;
            --clr-text-muted: #98A8BC;
            --clr-border: #E2E9F2;
            --clr-divider: #EAF0F6;
            --shadow-sm: 0 4px 16px rgba(30, 42, 58, 0.06);
            --shadow-md: 0 8px 24px rgba(30, 42, 58, 0.12);
            --shadow-lg: 0 16px 40px rgba(30, 42, 58, 0.16);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-pill: 999px;
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Alibaba PuHuiTi", sans-serif;
            --font-num: "Inter", "SF Pro Display", "Roboto", sans-serif;
            --transition-base: all .25s ease;
            --container-max: 1200px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--clr-text);
            background: var(--clr-bg);
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        a {
            color: var(--clr-primary);
            text-decoration: none;
            transition: var(--transition-base);
        }

        a:hover {
            color: var(--clr-primary-dark);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        .container {
            max-width: var(--container-max);
            padding-left: 24px;
            padding-right: 24px;
        }

        .site-header {
            background: var(--clr-bg);
            border-bottom: 1px solid var(--clr-border);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 12px rgba(30, 42, 58, 0.04);
        }

        .custom-navbar {
            min-height: 64px;
            padding: 0 24px;
            background: transparent;
            border: none;
        }

        .custom-navbar .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0;
            margin-right: 32px;
        }

        .brand-icon {
            width: 36px;
            height: 36px;
            background: var(--clr-primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            box-shadow: 0 4px 12px rgba(46, 107, 230, 0.25);
        }

        .brand-text {
            font-family: var(--font-num), var(--font-sans);
            font-size: 20px;
            font-weight: 700;
            color: var(--clr-primary-dark);
            letter-spacing: -0.2px;
        }

        .custom-navbar .navbar-nav {
            gap: 4px;
        }

        .custom-navbar .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--clr-text-sub);
            padding: 8px 12px;
            margin: 0 6px;
            position: relative;
            transition: var(--transition-base);
            border-radius: 6px;
        }

        .custom-navbar .nav-link::after {
            content: '';
            position: absolute;
            left: 50%;
            bottom: 0;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background: var(--clr-primary);
            border-radius: 2px;
            transition: var(--transition-base);
        }

        .custom-navbar .nav-link:hover {
            color: var(--clr-primary);
            background: rgba(46, 107, 230, 0.06);
        }

        .custom-navbar .nav-link:hover::after {
            width: 70%;
            opacity: .2;
        }

        .custom-navbar .nav-link.active {
            color: var(--clr-primary);
            font-weight: 600;
        }

        .custom-navbar .nav-link.active::after {
            width: 70%;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }

        .command-search {
            position: relative;
            background: var(--clr-bg-soft);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-pill);
            height: 38px;
            width: 220px;
            display: flex;
            align-items: center;
            padding: 0 12px;
            transition: var(--transition-base);
        }

        .command-search:focus-within {
            border-color: var(--clr-primary);
            box-shadow: 0 0 0 4px rgba(46, 107, 230, 0.12);
            width: 300px;
            background: #fff;
        }

        .command-search i {
            color: var(--clr-text-muted);
            font-size: 13px;
            margin-right: 8px;
        }

        .command-search input {
            border: none;
            outline: none;
            background: transparent;
            flex: 1;
            font-size: 13px;
            color: var(--clr-text);
            font-family: var(--font-sans);
        }

        .command-search input::placeholder {
            color: var(--clr-text-muted);
        }

        .command-search .kbd {
            background: #fff;
            border: 1px solid var(--clr-border);
            border-radius: 4px;
            font-size: 11px;
            padding: 1px 6px;
            color: var(--clr-text-muted);
            white-space: nowrap;
            font-family: var(--font-num);
        }

        .nav-login,
        .nav-register {
            font-size: 14px;
            font-weight: 500;
            color: var(--clr-text-sub);
            white-space: nowrap;
            transition: var(--transition-base);
        }

        .nav-login:hover,
        .nav-register:hover {
            color: var(--clr-primary);
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--clr-primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            height: 36px;
            padding: 0 20px;
            border-radius: var(--radius-sm);
            border: none;
            white-space: nowrap;
            transition: var(--transition-base);
            box-shadow: 0 2px 8px rgba(46, 107, 230, 0.2);
        }

        .btn-cta:hover {
            background: var(--clr-primary-light);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }

        .btn-cta:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }

        .navbar-toggler {
            border: 1px solid var(--clr-border);
            padding: 6px 10px;
            border-radius: var(--radius-sm);
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(46, 107, 230, 0.15);
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg viewBox='0 0 30 30' xmlns='http://www.w3.org/2000/svg'%3e%3cpath stroke='%231A3F7A' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* ===== page hero ===== */
        .category-hero {
            background: var(--clr-bg-soft);
            padding: 72px 0 64px;
            position: relative;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: .35;
        }

        .category-hero .container {
            position: relative;
            z-index: 2;
        }

        .category-hero h1 {
            font-size: 34px;
            font-weight: 800;
            color: var(--clr-primary-dark);
            letter-spacing: -0.5px;
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .category-hero .hero-tagline {
            font-size: 15px;
            color: var(--clr-text-sub);
            max-width: 720px;
            margin-bottom: 20px;
            line-height: 1.8;
            word-break: break-all;
        }

        .category-hero .hero-line {
            width: 64px;
            height: 2px;
            background: var(--clr-primary);
            border-radius: 2px;
        }

        .hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 24px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #fff;
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-pill);
            padding: 6px 14px;
            font-size: 13px;
            color: var(--clr-text-sub);
            transition: var(--transition-base);
        }

        .hero-badge i {
            color: var(--clr-primary);
            font-size: 12px;
        }

        /* ===== section general ===== */
        .section-block {
            padding: 72px 0;
        }

        .section-header {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 36px;
        }

        .section-header .bar {
            width: 4px;
            height: 26px;
            background: var(--clr-primary);
            border-radius: 4px;
        }

        .section-header h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--clr-primary-dark);
            margin: 0;
            letter-spacing: -0.3px;
        }

        .section-desc {
            font-size: 14px;
            color: var(--clr-text-sub);
            line-height: 1.7;
            margin-bottom: 32px;
        }

        /* ===== feature cards 不规则布局 ===== */
        .feature-card-large {
            background: var(--clr-bg);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .feature-card-large:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .feature-card-large .card-img {
            height: 220px;
            overflow: hidden;
            position: relative;
        }

        .feature-card-large .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .3s ease;
        }

        .feature-card-large:hover .card-img img {
            transform: scale(1.03);
        }

        .feature-card-large .card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .feature-card-large .card-tag {
            display: inline-flex;
            align-items: center;
            align-self: flex-start;
            background: rgba(15, 163, 163, .1);
            color: var(--clr-accent);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            margin-bottom: 12px;
        }

        .feature-card-large h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--clr-primary-dark);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .feature-card-large p {
            font-size: 14px;
            color: var(--clr-text-sub);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }

        .card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--clr-primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition-base);
        }

        .card-link i {
            transition: transform .2s ease;
        }

        .card-link:hover i {
            transform: translateX(4px);
        }

        .feature-card-sm {
            background: var(--clr-bg);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .feature-card-sm:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .feature-card-sm .card-img {
            height: 130px;
            overflow: hidden;
        }

        .feature-card-sm .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .3s ease;
        }

        .feature-card-sm:hover .card-img img {
            transform: scale(1.03);
        }

        .feature-card-sm .card-body {
            padding: 18px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .feature-card-sm h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--clr-primary-dark);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .feature-card-sm p {
            font-size: 13px;
            color: var(--clr-text-sub);
            line-height: 1.6;
            margin-bottom: 12px;
            flex: 1;
        }

        .feature-card-sm .card-tag {
            display: inline-flex;
            align-items: center;
            align-self: flex-start;
            background: rgba(46, 107, 230, .08);
            color: var(--clr-primary);
            font-size: 11px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: var(--radius-pill);
        }

        .feature-card-horizontal {
            background: var(--clr-bg);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .feature-card-horizontal:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .feature-card-horizontal .card-img {
            height: 200px;
            overflow: hidden;
        }

        .feature-card-horizontal .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .3s ease;
        }

        .feature-card-horizontal:hover .card-img img {
            transform: scale(1.03);
        }

        .feature-card-horizontal .card-body {
            padding: 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .feature-card-horizontal h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--clr-primary-dark);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .feature-card-horizontal p {
            font-size: 14px;
            color: var(--clr-text-sub);
            line-height: 1.7;
            margin-bottom: 14px;
            flex: 1;
        }

        .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--clr-text-muted);
        }

        .card-meta .hot-tag {
            color: var(--clr-cta);
            font-weight: 600;
            font-size: 12px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* ===== 适用场景 ===== */
        .scene-section {
            background: var(--clr-bg-alt);
            padding: 72px 0;
        }

        .scene-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .scene-card {
            background: #fff;
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            text-align: center;
            transition: var(--transition-base);
            box-shadow: var(--shadow-sm);
        }

        .scene-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .scene-icon {
            width: 52px;
            height: 52px;
            background: var(--clr-bg-soft);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            color: var(--clr-primary);
            font-size: 20px;
            transition: var(--transition-base);
        }

        .scene-card:hover .scene-icon {
            background: var(--clr-primary);
            color: #fff;
        }

        .scene-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--clr-primary-dark);
            margin-bottom: 10px;
        }

        .scene-card p {
            font-size: 13px;
            color: var(--clr-text-sub);
            line-height: 1.6;
            margin: 0;
        }

        /* ===== 流程步骤 ===== */
        .steps-section {
            padding: 72px 0;
        }

        .steps-wrap {
            display: flex;
            gap: 20px;
            margin-top: 32px;
            counter-reset: step;
        }

        .step-card {
            flex: 1;
            background: var(--clr-bg);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            position: relative;
            transition: var(--transition-base);
            box-shadow: var(--shadow-sm);
        }

        .step-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .step-card::before {
            counter-increment: step;
            content: counter(step, decimal-leading-zero);
            font-family: var(--font-num);
            font-size: 28px;
            font-weight: 800;
            color: rgba(46, 107, 230, .35);
            position: absolute;
            top: 20px;
            right: 20px;
            line-height: 1;
        }

        .step-icon {
            width: 44px;
            height: 44px;
            background: var(--clr-bg-soft);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--clr-primary);
            font-size: 17px;
            margin-bottom: 16px;
        }

        .step-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--clr-primary-dark);
            margin-bottom: 8px;
        }

        .step-card p {
            font-size: 13px;
            color: var(--clr-text-sub);
            line-height: 1.6;
            margin: 0;
        }

        /* ===== 排行榜 ===== */
        .rank-section {
            background: var(--clr-bg-alt);
            padding: 72px 0;
        }

        .rank-list {
            background: #fff;
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 8px 0;
        }

        .rank-item {
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 16px 24px;
            border-bottom: 1px solid var(--clr-divider);
            transition: var(--transition-base);
        }

        .rank-item:last-child {
            border-bottom: none;
        }

        .rank-item:hover {
            background: var(--clr-bg-soft);
        }

        .rank-num {
            font-family: var(--font-num);
            font-size: 24px;
            font-weight: 800;
            width: 44px;
            text-align: center;
            color: rgba(46, 107, 230, .5);
            flex-shrink: 0;
        }

        .rank-item:nth-child(1) .rank-num {
            color: var(--clr-cta);
        }

        .rank-item:nth-child(2) .rank-num {
            color: var(--clr-primary);
        }

        .rank-item:nth-child(3) .rank-num {
            color: var(--clr-accent);
        }

        .rank-info {
            flex: 1;
        }

        .rank-info h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--clr-primary-dark);
            margin-bottom: 4px;
            line-height: 1.4;
        }

        .rank-info p {
            font-size: 13px;
            color: var(--clr-text-sub);
            margin: 0;
            line-height: 1.5;
        }

        .rank-badge {
            background: var(--clr-bg-soft);
            color: var(--clr-primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .rank-hot {
            background: rgba(255, 122, 69, .1);
            color: var(--clr-cta);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            flex-shrink: 0;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 72px 0;
        }

        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-wrap .accordion-item {
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            margin-bottom: 12px;
            background: var(--clr-bg);
            box-shadow: var(--shadow-sm);
            transition: var(--transition-base);
        }

        .faq-wrap .accordion-item:has(.accordion-button:not(.collapsed)) {
            border-left: 4px solid var(--clr-primary);
        }

        .faq-wrap .accordion-button {
            background: transparent;
            color: var(--clr-text);
            font-size: 15px;
            font-weight: 600;
            padding: 18px 20px;
            border: none;
            box-shadow: none;
            transition: var(--transition-base);
        }

        .faq-wrap .accordion-button:hover {
            background: var(--clr-bg-soft);
        }

        .faq-wrap .accordion-button:not(.collapsed) {
            color: var(--clr-primary);
            background: var(--clr-bg-soft);
        }

        .faq-wrap .accordion-button:focus {
            box-shadow: none;
            border: none;
        }

        .faq-wrap .accordion-button::after {
            background-image: none;
            content: '+';
            font-family: var(--font-num);
            font-size: 22px;
            font-weight: 400;
            color: var(--clr-primary);
            width: auto;
            height: auto;
            line-height: 1;
            transition: transform .2s ease;
        }

        .faq-wrap .accordion-button:not(.collapsed)::after {
            transform: rotate(45deg);
        }

        .faq-wrap .accordion-body {
            padding: 0 20px 20px;
            color: var(--clr-text-sub);
            font-size: 14px;
            line-height: 1.8;
            background: var(--clr-bg);
            border-top: 1px solid var(--clr-divider);
        }

        .faq-wrap .accordion-body p {
            margin-bottom: 8px;
        }

        .faq-wrap .accordion-body p:last-child {
            margin-bottom: 0;
        }

        /* ===== CTA band ===== */
        .cta-band {
            padding: 56px 0;
            background: var(--clr-bg-alt);
        }

        .cta-box {
            background: var(--clr-primary);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }

        .cta-box::before {
            content: '';
            position: absolute;
            width: 300px;
            height: 300px;
            background: rgba(255, 255, 255, .08);
            border-radius: 50%;
            top: -120px;
            right: -60px;
        }

        .cta-box::after {
            content: '';
            position: absolute;
            width: 180px;
            height: 180px;
            background: rgba(255, 255, 255, .05);
            border-radius: 50%;
            bottom: -70px;
            left: -30px;
        }

        .cta-box h2 {
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
            position: relative;
            z-index: 2;
        }

        .cta-box p {
            font-size: 14px;
            color: rgba(255, 255, 255, .85);
            margin-bottom: 24px;
            position: relative;
            z-index: 2;
        }

        .cta-box .btn-outline-white {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border: 1px solid rgba(255, 255, 255, .7);
            color: #fff;
            background: transparent;
            font-size: 14px;
            font-weight: 600;
            height: 42px;
            padding: 0 28px;
            border-radius: var(--radius-sm);
            position: relative;
            z-index: 2;
            transition: var(--transition-base);
        }

        .cta-box .btn-outline-white:hover {
            background: rgba(255, 255, 255, .15);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== footer ===== */
        .site-footer {
            background: var(--clr-bg);
            border-top: 1px solid var(--clr-border);
            padding-top: 56px;
        }

        .footer-grid .footer-brand {
            padding-right: 24px;
        }

        .footer-brand-desc {
            font-size: 13px;
            color: var(--clr-text-muted);
            line-height: 1.8;
            margin: 16px 0 20px;
            max-width: 280px;
        }

        .social-icons {
            display: flex;
            gap: 12px;
        }

        .social-icons a {
            width: 36px;
            height: 36px;
            border: 1px solid var(--clr-border);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--clr-text-sub);
            font-size: 15px;
            transition: var(--transition-base);
        }

        .social-icons a:hover {
            background: var(--clr-primary);
            color: #fff;
            border-color: var(--clr-primary);
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--clr-primary-dark);
            margin-bottom: 20px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 12px;
            font-size: 14px;
            color: var(--clr-text-sub);
        }

        .footer-col ul li a {
            color: var(--clr-text-sub);
            transition: var(--transition-base);
        }

        .footer-col ul li a:hover {
            color: var(--clr-primary);
            padding-left: 4px;
        }

        .footer-bottom {
            margin-top: 48px;
            padding: 20px 0;
            border-top: 1px solid var(--clr-divider);
        }

        .footer-bottom span {
            font-size: 13px;
            color: var(--clr-text-muted);
        }

        /* ===== responsive ===== */
        @media (max-width: 1199.98px) {
            .command-search {
                width: 180px;
            }

            .command-search:focus-within {
                width: 200px;
            }

            .nav-login,
            .nav-register {
                display: none;
            }

            .scene-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 991.98px) {
            .custom-navbar {
                padding: 12px 16px;
            }

            .custom-navbar .navbar-collapse {
                margin-top: 12px;
                padding: 16px;
                background: #fff;
                border: 1px solid var(--clr-border);
                border-radius: var(--radius-md);
                box-shadow: var(--shadow-md);
            }

            .custom-navbar .navbar-nav {
                gap: 0;
                margin-bottom: 16px !important;
            }

            .custom-navbar .nav-link {
                padding: 10px 12px;
                border-radius: var(--radius-sm);
            }

            .custom-navbar .nav-link.active {
                background: var(--clr-bg-soft);
            }

            .custom-navbar .nav-link.active::after {
                display: none;
            }

            .nav-actions {
                flex-direction: column;
                align-items: stretch;
                gap: 10px;
            }

            .command-search {
                width: 100%;
            }

            .command-search:focus-within {
                width: 100%;
            }

            .nav-login,
            .nav-register {
                display: inline-block;
                text-align: center;
                padding: 6px 0;
            }

            .btn-cta {
                width: 100%;
            }

            .steps-wrap {
                flex-direction: column;
            }

            .category-hero {
                padding: 56px 0 48px;
            }

            .category-hero h1 {
                font-size: 28px;
            }
        }

        @media (max-width: 767.98px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .section-block,
            .scene-section,
            .rank-section,
            .faq-section {
                padding: 56px 0;
            }

            .section-header h2 {
                font-size: 22px;
            }

            .category-hero h1 {
                font-size: 26px;
            }

            .scene-grid {
                grid-template-columns: 1fr;
            }

            .steps-wrap {
                gap: 12px;
            }

            .faq-wrap .accordion-button {
                font-size: 14px;
                padding: 16px;
            }

            .faq-wrap .accordion-body {
                padding: 0 16px 16px;
                font-size: 13px;
            }

            .cta-box {
                padding: 32px 20px;
            }

            .cta-box h2 {
                font-size: 20px;
            }

            .footer-grid {
                row-gap: 32px;
            }

            .footer-col h4 {
                margin-bottom: 14px;
            }

            .navbar-toggler {
                display: block;
            }

            .rank-item {
                flex-wrap: wrap;
                padding: 14px 16px;
            }

            .rank-num {
                width: 32px;
                font-size: 20px;
            }

            .rank-hot,
            .rank-badge {
                font-size: 11px;
                margin-left: auto;
            }
        }

        @media (max-width: 575.98px) {
            body {
                font-size: 15px;
            }

            .custom-navbar {
                padding: 10px 12px;
            }

            .brand-text {
                font-size: 17px;
            }

            .hero-badges {
                gap: 8px;
            }

            .hero-badge {
                padding: 5px 10px;
                font-size: 12px;
            }
        }

/* roulang page: category3 */
:root {
            --clr-primary: #2E6BE6;
            --clr-primary-dark: #1A3F7A;
            --clr-accent: #0FA3A3;
            --clr-cta: #FF7A45;
            --clr-bg: #FFFFFF;
            --clr-bg-alt: #F5F8FD;
            --clr-bg-soft: #EDF2FA;
            --clr-text: #1E2A3A;
            --clr-text-sub: #5A6B80;
            --clr-text-muted: #98A8BC;
            --clr-border: #E2E9F2;
            --clr-divider: #EAF0F6;
            --shadow-sm: 0 4px 16px rgba(30,42,58,0.06);
            --shadow-md: 0 8px 24px rgba(30,42,58,0.12);
            --shadow-lg: 0 16px 40px rgba(30,42,58,0.16);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-pill: 999px;
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Alibaba PuHuiTi", sans-serif;
            --font-mono: "SFMono-Regular", "Consolas", "Liberation Mono", monospace;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--clr-text);
            background: var(--clr-bg);
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s ease;
        }

        a:hover {
            color: var(--clr-primary);
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--clr-primary-dark);
            line-height: 1.35;
            font-weight: 700;
            margin-bottom: 12px;
        }

        p {
            margin-bottom: 16px;
        }

        /* ===== 导航 ===== */
        .site-header {
            background: #fff;
            border-bottom: 1px solid var(--clr-border);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 1px 4px rgba(30, 42, 58, 0.03);
        }

        .custom-navbar {
            min-height: 64px;
            padding: 0 24px;
            background: transparent;
        }

        .custom-navbar .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0;
            margin: 0;
            font-size: 20px;
            font-weight: 700;
            color: var(--clr-primary-dark);
            letter-spacing: .5px;
        }

        .custom-navbar .brand-icon {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--clr-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
        }

        .custom-navbar .navbar-nav {
            gap: 8px;
        }

        .custom-navbar .nav-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--clr-text);
            padding: 8px 14px !important;
            border-radius: 6px;
            position: relative;
            transition: color .2s ease, background .2s ease;
        }

        .custom-navbar .nav-link:hover {
            color: var(--clr-primary);
            background: rgba(46, 107, 230, 0.05);
        }

        .custom-navbar .nav-link.active {
            color: var(--clr-primary);
            font-weight: 600;
        }

        .custom-navbar .nav-link.active::after {
            content: '';
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 2px;
            height: 2px;
            background: var(--clr-primary);
            border-radius: 2px;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .command-search {
            position: relative;
            width: 220px;
            height: 38px;
            background: var(--clr-bg-alt);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-pill);
            display: flex;
            align-items: center;
            padding: 0 14px;
            gap: 8px;
            transition: width .3s ease, border-color .3s ease, box-shadow .3s ease;
        }

        .command-search:focus-within {
            width: 300px;
            border-color: var(--clr-primary);
            box-shadow: 0 0 0 4px rgba(46, 107, 230, 0.12);
            background: #fff;
        }

        .command-search i {
            font-size: 13px;
            color: var(--clr-text-muted);
        }

        .command-search input {
            border: none;
            outline: none;
            background: transparent;
            font-size: 13px;
            color: var(--clr-text);
            flex: 1;
            min-width: 0;
        }

        .command-search input::placeholder {
            color: var(--clr-text-muted);
        }

        .command-search .kbd {
            font-size: 11px;
            padding: 2px 8px;
            border: 1px solid var(--clr-border);
            border-radius: 6px;
            background: #fff;
            color: var(--clr-text-muted);
            font-family: var(--font-mono);
            white-space: nowrap;
        }

        .nav-login,
        .nav-register {
            font-size: 14px;
            font-weight: 500;
            color: var(--clr-text);
        }

        .nav-login:hover,
        .nav-register:hover {
            color: var(--clr-primary);
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 36px;
            padding: 0 20px;
            background: var(--clr-primary);
            color: #fff !important;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-pill);
            transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
            white-space: nowrap;
            border: none;
        }

        .btn-cta:hover {
            background: #3b78ee;
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }

        .btn-cta:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }

        .navbar-toggler {
            border: none;
            font-size: 20px;
            color: var(--clr-text);
            padding: 4px 8px;
        }

        .navbar-toggler:focus {
            box-shadow: none;
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3E%3Cpath stroke='rgba(30,42,58,0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E") !important;
        }

        /* 搜索下拉占位 */
        .search-dropdown {
            position: absolute;
            top: calc(100% + 8px);
            left: 0;
            right: 0;
            background: #fff;
            border: 1px solid var(--clr-border);
            border-radius: 12px;
            box-shadow: var(--shadow-md);
            padding: 16px;
            display: none;
            z-index: 10;
        }

        .command-search:focus-within .search-dropdown {
            display: block;
        }

        .search-dropdown .hot-title {
            font-size: 12px;
            color: var(--clr-text-muted);
            margin-bottom: 10px;
        }

        .search-dropdown .hot-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .search-dropdown .hot-tags span {
            font-size: 12px;
            padding: 4px 12px;
            background: var(--clr-bg-alt);
            border-radius: var(--radius-pill);
            color: var(--clr-text-sub);
            cursor: default;
        }

        /* ===== 页头 ===== */
        .page-hero {
            position: relative;
            background: var(--clr-bg-soft) url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            padding: 72px 0 64px;
            border-bottom: 1px solid var(--clr-border);
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(255, 255, 255, 0.88);
        }

        .page-hero .container {
            position: relative;
            z-index: 1;
            max-width: 900px;
            text-align: center;
        }

        .page-hero .hero-kicker {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            color: var(--clr-primary);
            background: rgba(46, 107, 230, 0.08);
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            margin-bottom: 20px;
            letter-spacing: .3px;
        }

        .page-hero h1 {
            font-size: 36px;
            font-weight: 800;
            color: var(--clr-primary-dark);
            margin-bottom: 16px;
            letter-spacing: .5px;
        }

        .page-hero .hero-lead {
            font-size: 16px;
            color: var(--clr-text-sub);
            max-width: 620px;
            margin: 0 auto;
            line-height: 1.8;
        }

        .page-hero .hero-line {
            width: 64px;
            height: 3px;
            background: var(--clr-primary);
            border-radius: 2px;
            margin: 28px auto 0;
        }

        /* ===== 通用板块 ===== */
        .section-block {
            padding: 80px 0;
        }

        .section-head {
            margin-bottom: 40px;
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .section-head .bar {
            width: 4px;
            height: 24px;
            background: var(--clr-primary);
            border-radius: 2px;
            flex-shrink: 0;
        }

        .section-head h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 0;
        }

        .section-head .section-sub {
            font-size: 14px;
            color: var(--clr-text-sub);
            margin-left: 8px;
        }

        .section-head .more-link {
            margin-left: auto;
            font-size: 14px;
            color: var(--clr-text-sub);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color .2s ease;
        }

        .section-head .more-link:hover {
            color: var(--clr-primary);
        }

        /* ===== 分类卡片区 ===== */
        .category-cards {
            padding: 80px 0 48px;
        }

        .cat-card {
            background: #fff;
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            height: 100%;
            transition: transform .3s ease, box-shadow .3s ease;
            display: flex;
            flex-direction: column;
        }

        .cat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .cat-card .card-cover {
            position: relative;
            overflow: hidden;
        }

        .cat-card .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .3s ease;
        }

        .cat-card:hover .card-cover img {
            transform: scale(1.03);
        }

        .cat-card .card-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .cat-card .card-tags {
            display: flex;
            gap: 8px;
            margin-bottom: 12px;
        }

        .cat-card .card-tags .tag {
            font-size: 12px;
            font-weight: 500;
            color: var(--clr-accent);
            background: rgba(15, 163, 163, 0.08);
            padding: 3px 12px;
            border-radius: var(--radius-pill);
        }

        .cat-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--clr-primary-dark);
            margin-bottom: 10px;
        }

        .cat-card .card-desc {
            font-size: 14px;
            color: var(--clr-text-sub);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }

        .cat-card .card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--clr-primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap .2s ease;
        }

        .cat-card .card-link:hover {
            gap: 10px;
            color: var(--clr-primary-dark);
        }

        .cat-card-lg .card-cover {
            height: 220px;
        }

        .cat-card-sm .card-cover {
            height: 150px;
        }

        .cat-card-sm h3 {
            font-size: 18px;
        }

        .cat-card-horizontal {
            flex-direction: row;
            align-items: stretch;
        }

        .cat-card-horizontal .card-cover {
            width: 40%;
            min-height: 180px;
            flex-shrink: 0;
        }

        .cat-card-horizontal .card-body {
            padding: 20px 24px;
        }

        .cat-card-horizontal h3 {
            font-size: 18px;
        }

        /* ===== 标签区 ===== */
        .tags-section {
            padding: 32px 0 80px;
        }

        .tags-wrap {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            padding: 24px;
            background: var(--clr-bg-alt);
            border-radius: var(--radius-lg);
        }

        .tags-wrap .topic-tag {
            font-size: 14px;
            font-weight: 500;
            color: var(--clr-text-sub);
            background: #fff;
            border: 1px solid var(--clr-border);
            padding: 8px 20px;
            border-radius: var(--radius-pill);
            transition: all .2s ease;
            cursor: default;
        }

        .tags-wrap .topic-tag:hover {
            color: var(--clr-primary);
            border-color: var(--clr-primary);
            background: rgba(46, 107, 230, 0.04);
        }

        .tags-wrap .topic-tag i {
            margin-right: 6px;
            font-size: 13px;
            color: var(--clr-primary);
        }

        /* ===== FAQ 手风琴 ===== */
        .faq-section {
            background: var(--clr-bg-alt);
            padding: 80px 0;
        }

        .faq-accordion {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-accordion .accordion-item {
            background: #fff;
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
        }

        .faq-accordion .accordion-item:last-child {
            margin-bottom: 0;
        }

        .faq-accordion .accordion-button {
            background: transparent;
            border: none;
            font-size: 15px;
            font-weight: 600;
            color: var(--clr-text);
            padding: 20px 24px;
            box-shadow: none;
            transition: background .2s ease, color .2s ease;
            position: relative;
        }

        .faq-accordion .accordion-button:hover {
            background: rgba(46, 107, 230, 0.04);
            color: var(--clr-primary);
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            background: rgba(46, 107, 230, 0.04);
            color: var(--clr-primary);
        }

        .faq-accordion .accordion-button::after {
            background-image: none;
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            content: "\2b";
            color: var(--clr-text-sub);
            font-size: 16px;
            transition: transform .2s ease;
        }

        .faq-accordion .accordion-button:not(.collapsed)::after {
            transform: rotate(45deg);
            color: var(--clr-primary);
        }

        .faq-accordion .accordion-body {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--clr-text-sub);
            line-height: 1.8;
            border-top: 1px solid var(--clr-divider);
            padding-top: 16px;
        }

        .faq-accordion .accordion-item:has(.accordion-button:not(.collapsed)) {
            border-color: var(--clr-primary);
            box-shadow: var(--shadow-sm);
        }

        /* ===== 流程区 ===== */
        .process-section {
            padding: 80px 0;
        }

        .process-steps {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            margin-top: 8px;
        }

        .step-item {
            position: relative;
            background: #fff;
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            transition: transform .3s ease, box-shadow .3s ease;
        }

        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .step-item .step-num {
            font-family: var(--font-mono);
            font-size: 32px;
            font-weight: 700;
            color: var(--clr-primary);
            opacity: .5;
            line-height: 1;
            margin-bottom: 16px;
        }

        .step-item .step-icon {
            width: 56px;
            height: 56px;
            margin: 0 auto 16px;
            background: var(--clr-bg-soft);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--clr-primary);
        }

        .step-item h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--clr-primary-dark);
            margin-bottom: 10px;
        }

        .step-item p {
            font-size: 14px;
            color: var(--clr-text-sub);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== 场景区 ===== */
        .scenario-section {
            padding: 80px 0;
            background: var(--clr-bg-alt);
        }

        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .scenario-card {
            background: #fff;
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            padding: 28px;
            display: flex;
            gap: 20px;
            transition: transform .3s ease, box-shadow .3s ease;
        }

        .scenario-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }

        .scenario-card .scenario-icon {
            width: 48px;
            height: 48px;
            flex-shrink: 0;
            border-radius: 12px;
            background: var(--clr-bg-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--clr-primary);
        }

        .scenario-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--clr-primary-dark);
            margin-bottom: 6px;
        }

        .scenario-card p {
            font-size: 14px;
            color: var(--clr-text-sub);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== CTA 条 ===== */
        .cta-banner {
            padding: 64px 0;
        }

        .cta-box {
            background: var(--clr-bg-alt);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            text-align: center;
        }

        .cta-box h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--clr-primary-dark);
            margin-bottom: 8px;
        }

        .cta-box p {
            font-size: 15px;
            color: var(--clr-text-sub);
            margin-bottom: 24px;
        }

        .cta-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-outline-primary-custom {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 42px;
            padding: 0 28px;
            border: 1px solid var(--clr-primary);
            color: var(--clr-primary);
            background: transparent;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: all .2s ease;
        }

        .btn-outline-primary-custom:hover {
            background: rgba(46, 107, 230, 0.08);
            color: var(--clr-primary);
            transform: translateY(-1px);
        }

        .btn-outline-primary-custom:active {
            transform: translateY(0);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #fff;
            border-top: 1px solid var(--clr-border);
            padding-top: 64px;
        }

        .footer-grid {
            padding-bottom: 40px;
        }

        .footer-brand .navbar-brand {
            margin-bottom: 16px;
        }

        .footer-brand-desc {
            font-size: 13px;
            color: var(--clr-text-muted);
            line-height: 1.7;
            max-width: 260px;
            margin-bottom: 20px;
        }

        .social-icons {
            display: flex;
            gap: 12px;
        }

        .social-icons a {
            width: 36px;
            height: 36px;
            background: var(--clr-bg-alt);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            color: var(--clr-text-sub);
            transition: all .2s ease;
        }

        .social-icons a:hover {
            background: var(--clr-primary);
            color: #fff;
            transform: translateY(-2px);
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--clr-primary-dark);
            margin-bottom: 16px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            font-size: 14px;
            color: var(--clr-text-sub);
            margin-bottom: 10px;
            line-height: 1.6;
        }

        .footer-col ul li a {
            color: var(--clr-text-sub);
            transition: color .2s ease;
        }

        .footer-col ul li a:hover {
            color: var(--clr-primary);
        }

        .footer-col ul li i {
            margin-right: 8px;
            color: var(--clr-text-muted);
            font-size: 13px;
        }

        .footer-bottom {
            border-top: 1px solid var(--clr-divider);
            padding: 20px 0;
            text-align: center;
        }

        .footer-bottom span {
            font-size: 13px;
            color: var(--clr-text-muted);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1199.98px) {
            .command-search {
                width: 180px;
            }

            .command-search:focus-within {
                width: 220px;
            }

            .nav-actions {
                gap: 8px;
            }
        }

        @media (max-width: 991.98px) {
            .custom-navbar {
                padding: 10px 16px;
            }

            .navbar-collapse {
                background: #fff;
                padding: 20px;
                border-radius: var(--radius-md);
                box-shadow: var(--shadow-md);
                margin-top: 12px;
                border: 1px solid var(--clr-border);
            }

            .custom-navbar .navbar-nav {
                gap: 4px;
                margin-bottom: 16px !important;
            }

            .custom-navbar .nav-link.active::after {
                display: none;
            }

            .nav-actions {
                flex-wrap: wrap;
                gap: 10px;
            }

            .command-search {
                width: 100%;
            }

            .command-search:focus-within {
                width: 100%;
            }

            .page-hero h1 {
                font-size: 30px;
            }

            .process-steps {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .scenario-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 767.98px) {
            .section-block {
                padding: 56px 0;
            }

            .category-cards {
                padding: 56px 0 32px;
            }

            .tags-section {
                padding: 24px 0 56px;
            }

            .page-hero {
                padding: 56px 0 48px;
            }

            .page-hero h1 {
                font-size: 26px;
            }

            .page-hero .hero-lead {
                font-size: 15px;
            }

            .section-head h2 {
                font-size: 22px;
            }

            .cat-card-horizontal {
                flex-direction: column;
            }

            .cat-card-horizontal .card-cover {
                width: 100%;
                min-height: 160px;
            }

            .cat-card-lg .card-cover {
                height: 180px;
            }

            .cta-box {
                padding: 36px 20px;
            }

            .cta-box h2 {
                font-size: 22px;
            }

            .btn-cta {
                width: 100%;
                height: 44px;
            }

            .footer-grid {
                row-gap: 32px;
            }

            .footer-col {
                flex: 0 0 50%;
                max-width: 50%;
            }
        }

        @media (max-width: 575.98px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .footer-col {
                flex: 0 0 100%;
                max-width: 100%;
            }
        }