/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #1e40af;
            --color-primary-dark: #1e3a5f;
            --color-primary-light: #60a5fa;
            --color-accent: #ea580c;
            --color-accent-light: #fb923c;
            --color-bg: #f8fafc;
            --color-bg-alt: #ffffff;
            --color-text: #1e293b;
            --color-text-muted: #64748b;
            --color-text-light: #94a3b8;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --radius-sm: 0.375rem;
            --radius-md: 0.75rem;
            --radius-lg: 1.25rem;
            --radius-xl: 1.5rem;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.10);
            --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
            --space-section: 5rem;
            --space-section-mobile: 3rem;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            background-color: var(--color-bg);
            color: var(--color-text);
            line-height: 1.7;
            font-size: 1rem;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: var(--color-accent);
        }
        a:focus-visible {
            outline: 2px solid var(--color-primary-light);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        button:focus-visible {
            outline: 2px solid var(--color-primary-light);
            outline-offset: 2px;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }
        @media (max-width: 640px) {
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }
        }

        /* ===== 导航 ===== */
        .site-header {
            background: #ffffff;
            border-bottom: 1px solid var(--color-border);
            position: sticky;
            top: 0;
            z-index: 50;
            box-shadow: var(--shadow-sm);
        }

        .nav-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.75rem 0;
            gap: 1rem;
        }

        .nav-logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            white-space: nowrap;
        }
        .nav-logo i {
            color: var(--color-accent);
            font-size: 1.75rem;
        }
        .nav-logo:hover {
            color: var(--color-primary);
            opacity: 0.9;
        }

        .nav-search {
            flex: 0 1 320px;
            display: flex;
            align-items: center;
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: 9999px;
            padding: 0.375rem 0.375rem 0.375rem 1rem;
            transition: border-color 0.2s, box-shadow 0.2s;
        }
        .nav-search:focus-within {
            border-color: var(--color-primary-light);
            box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.12);
        }
        .nav-search input {
            flex: 1;
            border: none;
            background: transparent;
            padding: 0.375rem 0;
            font-size: 0.875rem;
            color: var(--color-text);
            outline: none;
            min-width: 0;
        }
        .nav-search input::placeholder {
            color: var(--color-text-light);
        }
        .nav-search button {
            background: var(--color-primary);
            color: #fff;
            border-radius: 9999px;
            padding: 0.4rem 1rem;
            font-size: 0.8rem;
            font-weight: 600;
            transition: background 0.2s;
            white-space: nowrap;
        }
        .nav-search button:hover {
            background: var(--color-primary-dark);
        }

        .nav-cta {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .nav-cta .btn-login {
            background: var(--color-accent);
            color: #fff;
            padding: 0.5rem 1.5rem;
            border-radius: 9999px;
            font-weight: 700;
            font-size: 0.875rem;
            transition: background 0.2s, transform 0.15s;
            white-space: nowrap;
        }
        .nav-cta .btn-login:hover {
            background: #c2410c;
            transform: scale(1.02);
        }
        .nav-cta .btn-login:active {
            transform: scale(0.97);
        }

        .nav-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--color-text);
            padding: 0.25rem;
        }

        /* 第二行频道 Tabs */
        .nav-tabs-wrap {
            border-top: 1px solid var(--color-border-light);
            background: #fafcff;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }
        .nav-tabs-wrap::-webkit-scrollbar {
            display: none;
        }
        .nav-tabs {
            display: flex;
            gap: 0.25rem;
            padding: 0.5rem 0;
            min-width: max-content;
        }
        .nav-tabs a {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.45rem 1.2rem;
            border-radius: 9999px;
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--color-text-muted);
            background: transparent;
            transition: background 0.2s, color 0.2s, box-shadow 0.2s;
            white-space: nowrap;
        }
        .nav-tabs a i {
            font-size: 0.8rem;
            opacity: 0.7;
        }
        .nav-tabs a:hover {
            background: var(--color-border-light);
            color: var(--color-primary);
        }
        .nav-tabs a.active {
            background: var(--color-primary);
            color: #ffffff;
            box-shadow: 0 2px 8px rgba(30, 64, 175, 0.25);
        }
        .nav-tabs a.active:hover {
            background: var(--color-primary-dark);
            color: #fff;
        }

        /* 移动端导航 */
        @media (max-width: 768px) {
            .nav-search {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .nav-cta .btn-login {
                padding: 0.4rem 1rem;
                font-size: 0.8rem;
            }
            .nav-logo {
                font-size: 1.25rem;
            }
            .nav-logo i {
                font-size: 1.4rem;
            }
            .nav-top {
                padding: 0.6rem 0;
            }
            .nav-tabs a {
                padding: 0.35rem 0.9rem;
                font-size: 0.8rem;
            }
        }

        @media (max-width: 480px) {
            .nav-logo {
                font-size: 1.1rem;
            }
            .nav-logo i {
                font-size: 1.2rem;
            }
            .nav-cta .btn-login {
                padding: 0.3rem 0.8rem;
                font-size: 0.75rem;
            }
            .nav-tabs a {
                padding: 0.3rem 0.7rem;
                font-size: 0.75rem;
            }
        }

        /* ===== 移动端抽屉菜单 ===== */
        .mobile-menu {
            display: none;
            position: fixed;
            inset: 0;
            z-index: 100;
            background: rgba(0, 0, 0, 0.4);
            backdrop-filter: blur(6px);
        }
        .mobile-menu.open {
            display: block;
        }
        .mobile-menu-inner {
            position: absolute;
            top: 0;
            right: 0;
            bottom: 0;
            width: 280px;
            background: #fff;
            padding: 2rem 1.5rem;
            box-shadow: var(--shadow-xl);
            overflow-y: auto;
        }
        .mobile-menu-close {
            position: absolute;
            top: 1rem;
            right: 1rem;
            font-size: 1.5rem;
            color: var(--color-text-muted);
        }
        .mobile-menu-inner .nav-logo {
            margin-bottom: 2rem;
        }
        .mobile-menu-links {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }
        .mobile-menu-links a {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.75rem 1rem;
            border-radius: var(--radius-md);
            font-weight: 600;
            color: var(--color-text);
            background: var(--color-bg);
            transition: background 0.2s;
        }
        .mobile-menu-links a i {
            width: 1.25rem;
            color: var(--color-primary);
        }
        .mobile-menu-links a:hover {
            background: var(--color-border-light);
        }
        .mobile-menu-links a.active {
            background: var(--color-primary);
            color: #fff;
        }
        .mobile-menu-links a.active i {
            color: #fff;
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: var(--space-section) 0;
        }
        .section-alt {
            background: var(--color-bg-alt);
        }
        .section-dark {
            background: var(--color-primary-dark);
            color: #fff;
        }
        .section-sm {
            padding: 2.5rem 0;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 0.75rem;
            color: var(--color-text);
            letter-spacing: -0.02em;
        }
        .section-title span {
            color: var(--color-accent);
        }
        .section-sub {
            font-size: 1.05rem;
            color: var(--color-text-muted);
            max-width: 640px;
            margin-bottom: 2.5rem;
            line-height: 1.7;
        }
        .section-title-center {
            text-align: center;
        }
        .section-sub-center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        @media (max-width: 768px) {
            .section {
                padding: var(--space-section-mobile) 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .section-sub {
                font-size: 0.95rem;
                margin-bottom: 1.75rem;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            background: linear-gradient(135deg, #0a1226 0%, #1e3a5f 60%, #1e40af 100%);
            color: #fff;
            padding: 5rem 0 4.5rem;
            overflow: hidden;
        }
        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
            pointer-events: none;
        }
        .hero .container {
            position: relative;
            z-index: 1;
        }
        .hero-content {
            max-width: 720px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(4px);
            padding: 0.3rem 1rem;
            border-radius: 9999px;
            font-size: 0.8rem;
            font-weight: 600;
            color: #e0e7ff;
            margin-bottom: 1.5rem;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }
        .hero-badge i {
            color: var(--color-accent-light);
        }
        .hero h1 {
            font-size: 3.25rem;
            font-weight: 900;
            line-height: 1.15;
            letter-spacing: -0.03em;
            margin-bottom: 1.25rem;
        }
        .hero h1 span {
            background: linear-gradient(135deg, #fdba74, #ea580c);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.15rem;
            color: #cbd5e1;
            line-height: 1.8;
            margin-bottom: 2rem;
            max-width: 580px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            align-items: center;
        }
        .hero-actions .btn-primary {
            background: var(--color-accent);
            color: #fff;
            padding: 0.8rem 2.4rem;
            border-radius: 9999px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
            box-shadow: 0 4px 20px rgba(234, 88, 12, 0.35);
        }
        .hero-actions .btn-primary:hover {
            background: #c2410c;
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(234, 88, 12, 0.4);
        }
        .hero-actions .btn-primary:active {
            transform: translateY(0);
        }
        .hero-actions .btn-ghost {
            color: #e0e7ff;
            padding: 0.8rem 1.6rem;
            border-radius: 9999px;
            font-weight: 600;
            font-size: 1rem;
            border: 1px solid rgba(255, 255, 255, 0.2);
            transition: background 0.2s, border-color 0.2s;
        }
        .hero-actions .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.35);
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 2.5rem;
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        .hero-stat h3 {
            font-size: 1.75rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .hero-stat h3 small {
            font-size: 0.9rem;
            font-weight: 400;
            color: #94a3b8;
            margin-left: 0.25rem;
        }
        .hero-stat p {
            font-size: 0.85rem;
            color: #94a3b8;
            margin-bottom: 0;
        }

        @media (max-width: 768px) {
            .hero {
                padding: 3rem 0 3rem;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .hero-actions .btn-primary {
                padding: 0.65rem 1.8rem;
                font-size: 0.95rem;
            }
            .hero-stats {
                gap: 1.5rem;
                margin-top: 2rem;
                padding-top: 1.5rem;
            }
            .hero-stat h3 {
                font-size: 1.35rem;
            }
        }
        @media (max-width: 480px) {
            .hero h1 {
                font-size: 1.6rem;
            }
            .hero-stats {
                flex-direction: column;
                gap: 1rem;
            }
        }

        /* ===== 卡片 ===== */
        .card {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            padding: 1.75rem;
            transition: box-shadow 0.25s, transform 0.2s;
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .card-icon {
            width: 3.25rem;
            height: 3.25rem;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: #fff;
            margin-bottom: 1.25rem;
            background: var(--color-primary);
        }
        .card-icon.accent {
            background: var(--color-accent);
        }
        .card-icon.green {
            background: #059669;
        }
        .card-icon.purple {
            background: #7c3aed;
        }
        .card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--color-text);
        }
        .card p {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            line-height: 1.65;
        }

        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 1.5rem;
        }
        .card-grid-2 {
            grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
        }
        .card-grid-4 {
            grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
        }

        @media (max-width: 640px) {
            .card-grid {
                grid-template-columns: 1fr;
            }
            .card-grid-2 {
                grid-template-columns: 1fr;
            }
            .card-grid-4 {
                grid-template-columns: 1fr 1fr;
            }
            .card {
                padding: 1.25rem;
            }
        }

        /* ===== 分类入口标签 ===== */
        .cat-pills {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            margin-top: 0.5rem;
        }
        .cat-pill {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.5rem 1.25rem;
            border-radius: 9999px;
            font-weight: 600;
            font-size: 0.875rem;
            background: #fff;
            color: var(--color-text);
            border: 1px solid var(--color-border);
            transition: all 0.2s;
            box-shadow: var(--shadow-sm);
        }
        .cat-pill i {
            color: var(--color-primary);
            font-size: 0.8rem;
        }
        .cat-pill:hover {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .cat-pill:hover i {
            color: #fff;
        }

        /* ===== 资讯列表 ===== */
        .post-list {
            display: flex;
            flex-direction: column;
            gap: 1.25rem;
        }
        .post-item {
            display: flex;
            gap: 1.25rem;
            background: #fff;
            border-radius: var(--radius-md);
            padding: 1.25rem 1.5rem;
            border: 1px solid var(--color-border-light);
            transition: box-shadow 0.2s, transform 0.15s;
            align-items: flex-start;
        }
        .post-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .post-item .post-rank {
            flex-shrink: 0;
            width: 2.25rem;
            height: 2.25rem;
            border-radius: var(--radius-sm);
            background: var(--color-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 0.9rem;
            color: var(--color-primary);
        }
        .post-item .post-rank.top {
            background: var(--color-accent);
            color: #fff;
        }
        .post-item .post-body {
            flex: 1;
            min-width: 0;
        }
        .post-item .post-body h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 0.25rem;
            line-height: 1.4;
        }
        .post-item .post-body h4 a {
            color: var(--color-text);
        }
        .post-item .post-body h4 a:hover {
            color: var(--color-primary);
        }
        .post-item .post-body .post-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            font-size: 0.8rem;
            color: var(--color-text-light);
            margin-top: 0.25rem;
        }
        .post-item .post-body .post-meta span {
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
        }
        .post-item .post-body .post-meta .tag {
            background: var(--color-border-light);
            padding: 0.1rem 0.6rem;
            border-radius: 9999px;
            font-size: 0.7rem;
            color: var(--color-text-muted);
        }

        .post-empty {
            background: #fff;
            border-radius: var(--radius-md);
            padding: 2.5rem 2rem;
            text-align: center;
            border: 1px dashed var(--color-border);
            color: var(--color-text-muted);
            font-size: 0.95rem;
        }
        .post-empty i {
            font-size: 2rem;
            color: var(--color-text-light);
            margin-bottom: 0.75rem;
            display: block;
        }

        @media (max-width: 640px) {
            .post-item {
                flex-direction: column;
                padding: 1rem 1.25rem;
            }
            .post-item .post-rank {
                width: 1.75rem;
                height: 1.75rem;
                font-size: 0.75rem;
            }
            .post-item .post-body h4 {
                font-size: 0.9rem;
            }
        }

        /* ===== 流程步骤 ===== */
        .steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
            counter-reset: step;
        }
        .step-item {
            text-align: center;
            counter-increment: step;
            position: relative;
        }
        .step-item::before {
            content: counter(step);
            display: block;
            width: 3rem;
            height: 3rem;
            line-height: 3rem;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            font-size: 1.2rem;
            font-weight: 800;
            margin: 0 auto 1rem;
        }
        .step-item.accent::before {
            background: var(--color-accent);
        }
        .step-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.4rem;
        }
        .step-item p {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            line-height: 1.6;
        }
        .step-connector {
            display: none;
        }

        @media (min-width: 768px) {
            .steps {
                grid-template-columns: repeat(4, 1fr);
                gap: 1.5rem;
            }
            .step-item:not(:last-child)::after {
                content: '\f105';
                font-family: 'Font Awesome 6 Free';
                font-weight: 900;
                position: absolute;
                right: -1.2rem;
                top: 1.2rem;
                font-size: 1.5rem;
                color: var(--color-border);
            }
        }

        @media (max-width: 640px) {
            .steps {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }
        .faq-item {
            background: #fff;
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: box-shadow 0.2s;
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.1rem 1.5rem;
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--color-text);
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            transition: background 0.15s;
        }
        .faq-question:hover {
            background: var(--color-bg);
        }
        .faq-question i {
            color: var(--color-primary);
            transition: transform 0.25s;
            font-size: 0.85rem;
            flex-shrink: 0;
            margin-left: 0.75rem;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            padding: 0 1.5rem;
            color: var(--color-text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 1.5rem 1.25rem;
        }

        /* ===== CTA ===== */
        .cta-box {
            background: linear-gradient(135deg, #1e3a5f 0%, #1e40af 100%);
            border-radius: var(--radius-xl);
            padding: 3.5rem 3rem;
            text-align: center;
            color: #fff;
            box-shadow: var(--shadow-lg);
        }
        .cta-box h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 0.75rem;
        }
        .cta-box p {
            font-size: 1.05rem;
            color: #cbd5e1;
            max-width: 500px;
            margin: 0 auto 2rem;
        }
        .cta-box .btn-cta {
            background: var(--color-accent);
            color: #fff;
            padding: 0.85rem 2.8rem;
            border-radius: 9999px;
            font-weight: 700;
            font-size: 1.1rem;
            display: inline-block;
            transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
            box-shadow: 0 4px 20px rgba(234, 88, 12, 0.35);
        }
        .cta-box .btn-cta:hover {
            background: #c2410c;
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(234, 88, 12, 0.45);
        }

        @media (max-width: 640px) {
            .cta-box {
                padding: 2.5rem 1.5rem;
            }
            .cta-box h2 {
                font-size: 1.4rem;
            }
            .cta-box p {
                font-size: 0.9rem;
            }
            .cta-box .btn-cta {
                padding: 0.7rem 2rem;
                font-size: 0.95rem;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0f1b33;
            color: #cbd5e1;
            padding: 3.5rem 0 1.5rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-brand .nav-logo {
            color: #fff;
            margin-bottom: 0.75rem;
        }
        .footer-brand .nav-logo i {
            color: var(--color-accent-light);
        }
        .footer-brand p {
            font-size: 0.85rem;
            color: #94a3b8;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1rem;
            text-transform: uppercase;
            letter-spacing: 0.04em;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .footer-col ul li a {
            font-size: 0.85rem;
            color: #94a3b8;
            transition: color 0.2s;
        }
        .footer-col ul li a:hover {
            color: var(--color-accent-light);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 1.5rem;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 0.75rem;
            font-size: 0.8rem;
            color: #64748b;
        }
        .footer-bottom a {
            color: #94a3b8;
        }
        .footer-bottom a:hover {
            color: var(--color-accent-light);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 通用工具 ===== */
        .text-accent {
            color: var(--color-accent);
        }
        .text-primary {
            color: var(--color-primary);
        }
        .gap-1 {
            gap: 0.25rem;
        }
        .gap-2 {
            gap: 0.5rem;
        }
        .gap-3 {
            gap: 0.75rem;
        }
        .gap-4 {
            gap: 1rem;
        }
        .gap-6 {
            gap: 1.5rem;
        }
        .mt-2 {
            margin-top: 0.5rem;
        }
        .mt-4 {
            margin-top: 1rem;
        }
        .mt-6 {
            margin-top: 1.5rem;
        }
        .mt-8 {
            margin-top: 2rem;
        }
        .mb-2 {
            margin-bottom: 0.5rem;
        }
        .mb-4 {
            margin-bottom: 1rem;
        }
        .mb-6 {
            margin-bottom: 1.5rem;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .text-center {
            text-align: center;
        }

        /* ===== 广告/品牌声明 ===== */
        .brand-strip {
            background: linear-gradient(90deg, #1e3a5f, #1e40af, #1e3a5f);
            padding: 0.5rem 0;
            text-align: center;
            font-size: 0.75rem;
            color: rgba(255, 255, 255, 0.5);
            letter-spacing: 0.05em;
        }
        .brand-strip strong {
            color: rgba(255, 255, 255, 0.8);
            font-weight: 600;
        }

        /* ===== 滚动条美化 ===== */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--color-bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--color-border);
            border-radius: 3px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--color-text-light);
        }

/* roulang page: article */
:root {
            --primary: #e53e3e;
            --primary-dark: #c53030;
            --primary-light: #feb2b2;
            --accent: #f6ad55;
            --bg-body: #0f0f0f;
            --bg-card: #1a1a2e;
            --bg-card-hover: #222244;
            --bg-elevated: #16213e;
            --text-primary: #f7fafc;
            --text-secondary: #a0aec0;
            --text-muted: #718096;
            --border-color: #2d3748;
            --border-light: #4a5568;
            --radius: 1rem;
            --radius-sm: 0.5rem;
            --radius-lg: 1.5rem;
            --shadow-card: 0 8px 24px rgba(0,0,0,0.35);
            --shadow-hover: 0 12px 36px rgba(229,62,62,0.15);
            --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Noto Sans SC', sans-serif;
        }
        * { margin:0; padding:0; box-sizing:border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-sans);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a { color: var(--text-primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent); }
        img { max-width:100%; height:auto; display:block; border-radius: var(--radius-sm); }
        button { cursor: pointer; font-family: inherit; border: none; background: none; }
        input, textarea { font-family: inherit; outline: none; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 1.25rem; }
        .site-header {
            background: rgba(15,15,15,0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .nav-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.75rem 0;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.5px;
        }
        .nav-logo i { color: var(--primary); font-size: 1.5rem; }
        .nav-logo:hover { color: var(--primary); }
        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 2rem;
            overflow: hidden;
            flex: 1 1 260px;
            max-width: 380px;
            transition: border var(--transition);
        }
        .nav-search:focus-within { border-color: var(--primary); }
        .nav-search input {
            background: transparent;
            border: none;
            padding: 0.5rem 1rem;
            color: var(--text-primary);
            font-size: 0.875rem;
            width: 100%;
            min-width: 0;
        }
        .nav-search input::placeholder { color: var(--text-muted); }
        .nav-search button {
            background: transparent;
            padding: 0.5rem 1rem;
            color: var(--text-muted);
            font-size: 0.8rem;
            display: flex;
            align-items: center;
            gap: 0.35rem;
            transition: color var(--transition);
            white-space: nowrap;
        }
        .nav-search button:hover { color: var(--primary); }
        .nav-cta {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .btn-login {
            background: linear-gradient(135deg, var(--primary), #d63031);
            color: #fff !important;
            padding: 0.5rem 1.25rem;
            border-radius: 2rem;
            font-weight: 600;
            font-size: 0.85rem;
            display: flex;
            align-items: center;
            gap: 0.4rem;
            transition: transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 4px 14px rgba(229,62,62,0.3);
        }
        .btn-login:hover { transform: scale(1.04); box-shadow: 0 6px 22px rgba(229,62,62,0.45); }
        .nav-toggle { color: var(--text-primary); font-size: 1.4rem; padding: 0.25rem; display: none; }
        .nav-tabs-wrap {
            background: rgba(22,33,62,0.5);
            border-top: 1px solid var(--border-color);
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
        }
        .nav-tabs-wrap::-webkit-scrollbar { height: 0; }
        .nav-tabs {
            display: flex;
            gap: 0.25rem;
            padding: 0.5rem 0;
            min-width: max-content;
        }
        .nav-tabs a {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.45rem 1.2rem;
            border-radius: 2rem;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-tabs a i { font-size: 0.8rem; }
        .nav-tabs a:hover { color: var(--text-primary); background: rgba(255,255,255,0.06); }
        .nav-tabs a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(229,62,62,0.35);
        }
        /* article hero */
        .article-hero {
            background: linear-gradient(145deg, #16213e 0%, #0f0f0f 100%);
            padding: 2.5rem 0 2rem;
            border-bottom: 1px solid var(--border-color);
        }
        .article-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 1.25rem;
            flex-wrap: wrap;
        }
        .article-hero .breadcrumb a { color: var(--text-muted); }
        .article-hero .breadcrumb a:hover { color: var(--accent); }
        .article-hero .breadcrumb .sep { color: var(--border-light); }
        .article-hero h1 {
            font-size: 2.2rem;
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: -0.5px;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1.25rem;
            align-items: center;
            color: var(--text-secondary);
            font-size: 0.85rem;
        }
        .article-meta .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            background: rgba(229,62,62,0.15);
            color: var(--primary-light);
            padding: 0.2rem 0.75rem;
            border-radius: 2rem;
            font-weight: 500;
            font-size: 0.75rem;
        }
        .article-meta .badge i { font-size: 0.7rem; }
        /* article body */
        .article-body {
            padding: 2.5rem 0 4rem;
        }
        .article-content {
            max-width: 820px;
            margin: 0 auto;
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 2.5rem 2.8rem;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
        }
        .article-content p {
            margin-bottom: 1.25rem;
            color: var(--text-secondary);
            font-size: 1rem;
            line-height: 1.8;
        }
        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin: 2rem 0 0.75rem;
            color: var(--text-primary);
        }
        .article-content h3 {
            font-size: 1.2rem;
            font-weight: 600;
            margin: 1.5rem 0 0.5rem;
            color: var(--text-primary);
        }
        .article-content ul, .article-content ol {
            margin-bottom: 1.25rem;
            padding-left: 1.5rem;
            color: var(--text-secondary);
        }
        .article-content li { margin-bottom: 0.35rem; }
        .article-content a { color: #63b3ed; border-bottom: 1px solid rgba(99,179,237,0.25); }
        .article-content a:hover { color: #90cdf4; border-color: #90cdf4; }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: rgba(229,62,62,0.05);
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
        }
        .article-content img {
            border-radius: var(--radius-sm);
            margin: 1.5rem auto;
            box-shadow: var(--shadow-card);
        }
        .article-content .post-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid var(--border-color);
        }
        .article-content .post-tags a {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            background: rgba(255,255,255,0.05);
            padding: 0.25rem 0.9rem;
            border-radius: 2rem;
            font-size: 0.75rem;
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .article-content .post-tags a:hover { background: rgba(229,62,62,0.12); color: var(--primary-light); border-color: var(--primary); }
        .article-nav {
            max-width: 820px;
            margin: 2rem auto 0;
            display: flex;
            justify-content: space-between;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .article-nav a {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.6rem 1.2rem;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            font-size: 0.85rem;
            color: var(--text-secondary);
            transition: all var(--transition);
        }
        .article-nav a:hover { border-color: var(--primary); color: var(--text-primary); background: var(--bg-card-hover); }
        .not-found-box {
            max-width: 600px;
            margin: 4rem auto;
            text-align: center;
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 3rem 2rem;
            border: 1px solid var(--border-color);
        }
        .not-found-box i { font-size: 3rem; color: var(--text-muted); margin-bottom: 1rem; }
        .not-found-box h2 { font-size: 1.5rem; font-weight: 700; margin-bottom: 0.75rem; }
        .not-found-box p { color: var(--text-secondary); margin-bottom: 1.5rem; }
        .not-found-box a.btn-back {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--primary);
            color: #fff;
            padding: 0.6rem 1.5rem;
            border-radius: 2rem;
            font-weight: 600;
            transition: background var(--transition);
        }
        .not-found-box a.btn-back:hover { background: var(--primary-dark); }
        /* site-footer */
        .site-footer {
            background: #0a0a1a;
            border-top: 1px solid var(--border-color);
            padding: 3rem 0 1.5rem;
            margin-top: 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-brand .nav-logo { font-size: 1.25rem; margin-bottom: 0.75rem; }
        .footer-brand p { font-size: 0.85rem; color: var(--text-muted); max-width: 320px; line-height: 1.6; }
        .footer-col h4 { font-size: 0.9rem; font-weight: 600; margin-bottom: 0.75rem; color: var(--text-primary); }
        .footer-col ul { list-style: none; padding: 0; }
        .footer-col ul li { margin-bottom: 0.4rem; }
        .footer-col ul li a { font-size: 0.8rem; color: var(--text-muted); transition: color var(--transition); display: flex; align-items: center; gap: 0.4rem; }
        .footer-col ul li a:hover { color: var(--accent); }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 1.25rem;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            font-size: 0.75rem;
            color: var(--text-muted);
            gap: 0.75rem;
        }
        .footer-bottom a { color: var(--text-muted); }
        .footer-bottom a:hover { color: var(--accent); }
        /* responsive */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .nav-top { flex-wrap: wrap; }
            .nav-search { order: 3; flex: 1 1 100%; max-width: 100%; }
            .nav-cta .hidden { display: none !important; }
            .nav-toggle { display: block; }
            .nav-tabs a { font-size: 0.78rem; padding: 0.35rem 0.9rem; }
            .article-hero h1 { font-size: 1.5rem; }
            .article-content { padding: 1.5rem 1.2rem; }
            .article-content p { font-size: 0.92rem; }
            .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 0.9rem; }
            .nav-logo { font-size: 1.1rem; }
            .nav-search input { font-size: 0.8rem; }
            .btn-login { font-size: 0.75rem; padding: 0.4rem 0.9rem; }
            .nav-tabs a { font-size: 0.72rem; padding: 0.3rem 0.7rem; }
            .article-hero h1 { font-size: 1.25rem; }
            .article-meta { font-size: 0.75rem; gap: 0.75rem; }
            .article-content { padding: 1rem 0.9rem; }
            .article-nav { flex-direction: column; }
            .not-found-box { padding: 2rem 1rem; }
        }

/* roulang page: category1 */
/* ===== Design Variables & Reset ===== */
        :root {
            --primary: #e63946;
            --primary-light: #fce8ea;
            --secondary: #1d3557;
            --accent: #f4a261;
            --bg: #ffffff;
            --surface: #f8fafc;
            --text: #0f172a;
            --text-muted: #6b7280;
            --border: #e2e8f0;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.10);
            --radius: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }
        body {
            font-family: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        input:focus-visible,
        button:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        ::selection {
            background: var(--primary);
            color: #fff;
        }

        /* ===== Container ===== */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.25rem;
            width: 100%;
        }
        @media (min-width: 768px) {
            .container {
                padding: 0 2rem;
            }
        }
        @media (min-width: 1024px) {
            .container {
                padding: 0 2.5rem;
            }
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            background: #fff;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-sm);
        }
        .nav-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.75rem 0;
            gap: 1rem;
            flex-wrap: nowrap;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            white-space: nowrap;
            flex-shrink: 0;
        }
        .nav-logo i {
            font-size: 1.5rem;
        }
        .nav-search {
            display: none;
            flex: 1;
            max-width: 360px;
            position: relative;
        }
        .nav-search input {
            width: 100%;
            padding: 0.5rem 1rem 0.5rem 2.5rem;
            border: 1px solid var(--border);
            border-radius: 2rem;
            background: var(--surface);
            font-size: 0.875rem;
            transition: all var(--transition);
        }
        .nav-search input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.15);
            outline: none;
        }
        .nav-search button {
            position: absolute;
            left: 0.25rem;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            color: var(--text-muted);
            font-size: 0.875rem;
            padding: 0.25rem 0.75rem;
            cursor: pointer;
            transition: color var(--transition);
        }
        .nav-search button:hover {
            color: var(--primary);
        }
        @media (min-width: 768px) {
            .nav-search {
                display: flex;
            }
        }
        .nav-cta {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            flex-shrink: 0;
        }
        .btn-login {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.5rem 1.25rem;
            background: var(--primary);
            color: #fff;
            border-radius: 2rem;
            font-weight: 600;
            font-size: 0.875rem;
            transition: all var(--transition);
            box-shadow: 0 2px 8px rgba(230, 57, 70, 0.25);
            border: none;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-login:hover {
            background: #c62832;
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(230, 57, 70, 0.35);
        }
        .btn-login i {
            font-size: 1rem;
        }
        .nav-toggle {
            background: none;
            border: none;
            font-size: 1.35rem;
            color: var(--text);
            padding: 0.25rem 0.5rem;
            cursor: pointer;
            transition: color var(--transition);
            display: flex;
        }
        @media (min-width: 768px) {
            .nav-toggle {
                display: none;
            }
        }

        /* ===== Nav Tabs (第二行) ===== */
        .nav-tabs-wrap {
            border-top: 1px solid var(--border);
            background: #fff;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }
        .nav-tabs-wrap::-webkit-scrollbar {
            display: none;
        }
        .nav-tabs {
            display: flex;
            gap: 0.25rem;
            padding: 0.5rem 0;
            min-width: max-content;
        }
        .nav-tabs a {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.5rem 1rem;
            font-size: 0.875rem;
            font-weight: 500;
            color: var(--text-muted);
            border-radius: 2rem;
            transition: all var(--transition);
            white-space: nowrap;
            border: 1px solid transparent;
        }
        .nav-tabs a i {
            font-size: 0.9rem;
        }
        .nav-tabs a:hover {
            color: var(--primary);
            background: var(--primary-light);
            border-color: rgba(230, 57, 70, 0.15);
        }
        .nav-tabs a.active {
            color: #fff;
            background: var(--primary);
            border-color: var(--primary);
            box-shadow: 0 2px 8px rgba(230, 57, 70, 0.25);
        }
        .nav-tabs a.active i {
            color: #fff;
        }

        /* ===== Mobile Menu ===== */
        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            z-index: 200;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s;
        }
        .mobile-menu.open {
            display: block;
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-menu-inner {
            background: #fff;
            width: 85%;
            max-width: 320px;
            height: 100%;
            padding: 1.5rem;
            overflow-y: auto;
            transform: translateX(-100%);
            transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            box-shadow: var(--shadow-lg);
        }
        .mobile-menu.open .mobile-menu-inner {
            transform: translateX(0);
        }
        .mobile-menu-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 1.5rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid var(--border);
        }
        .mobile-menu-close {
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text);
            cursor: pointer;
            padding: 0.25rem;
        }
        .mobile-nav-list {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .mobile-nav-list a {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            padding: 0.75rem 1rem;
            border-radius: var(--radius);
            font-weight: 500;
            color: var(--text);
            transition: all var(--transition);
        }
        .mobile-nav-list a:hover {
            background: var(--surface);
            color: var(--primary);
        }
        .mobile-nav-list a.active {
            background: var(--primary-light);
            color: var(--primary);
        }

        /* ===== Hero ===== */
        .hero-section {
            background: linear-gradient(135deg, var(--secondary) 0%, #0f2740 100%);
            color: #fff;
            padding: 4rem 0 3.5rem;
            position: relative;
            overflow: hidden;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            right: -10%;
            top: -20%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: rgba(230, 57, 70, 0.10);
            pointer-events: none;
        }
        .hero-section .container {
            position: relative;
            z-index: 1;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(6px);
            padding: 0.35rem 1rem;
            border-radius: 2rem;
            font-size: 0.8rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 1.25rem;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .hero-section h1 {
            font-size: clamp(2rem, 5.5vw, 3.4rem);
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 1rem;
            letter-spacing: -0.01em;
        }
        .hero-section h1 span {
            color: var(--accent);
        }
        .hero-section p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 600px;
            line-height: 1.8;
            margin-bottom: 1.75rem;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
        }
        .hero-actions .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.7rem 1.75rem;
            background: var(--primary);
            color: #fff;
            border-radius: 2rem;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            box-shadow: 0 4px 14px rgba(230, 57, 70, 0.35);
            border: none;
            cursor: pointer;
        }
        .hero-actions .btn-primary:hover {
            background: #c62832;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(230, 57, 70, 0.40);
        }
        .hero-actions .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.7rem 1.75rem;
            background: transparent;
            color: #fff;
            border-radius: 2rem;
            font-weight: 600;
            font-size: 0.9rem;
            border: 1.5px solid rgba(255, 255, 255, 0.3);
            transition: all var(--transition);
            cursor: pointer;
        }
        .hero-actions .btn-outline:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.08);
        }

        /* ===== Sections ===== */
        .section {
            padding: 4rem 0;
        }
        .section-alt {
            background: var(--surface);
        }
        .section-title {
            font-size: clamp(1.5rem, 3vw, 2rem);
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.5rem;
            letter-spacing: -0.01em;
        }
        .section-subtitle {
            color: var(--text-muted);
            font-size: 1rem;
            max-width: 600px;
            margin: 0 auto 2.5rem;
            line-height: 1.7;
        }
        .section-header {
            text-align: center;
            margin-bottom: 2.5rem;
        }
        .section-header .section-title {
            margin-bottom: 0.5rem;
        }

        /* ===== Cards ===== */
        .card {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            padding: 1.5rem;
            transition: all var(--transition);
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .card-icon {
            width: 3rem;
            height: 3rem;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 1rem;
            font-size: 1.4rem;
            color: #fff;
            margin-bottom: 1rem;
            background: var(--primary);
        }
        .card-icon.secondary {
            background: var(--secondary);
        }
        .card-icon.accent {
            background: var(--accent);
        }
        .card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--text);
        }
        .card p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        /* ===== Grid ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
        }
        @media (min-width: 640px) {
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (min-width: 1024px) {
            .grid-3 {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
        }
        @media (min-width: 768px) {
            .grid-2 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1rem;
        }
        @media (min-width: 640px) {
            .grid-4 {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        @media (min-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(4, 1fr);
            }
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 0.75rem;
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(230, 57, 70, 0.2);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1rem 1.25rem;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text);
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            gap: 1rem;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: var(--surface);
        }
        .faq-question i {
            color: var(--primary);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 1.25rem 1rem;
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            display: none;
        }
        .faq-answer.open {
            display: block;
        }
        .faq-answer a {
            color: var(--primary);
            font-weight: 500;
        }
        .faq-answer a:hover {
            text-decoration: underline;
        }

        /* ===== Steps / Timeline ===== */
        .step-list {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
            max-width: 700px;
            margin: 0 auto;
        }
        .step-item {
            display: flex;
            gap: 1.25rem;
            align-items: flex-start;
            background: #fff;
            padding: 1.25rem 1.5rem;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .step-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateX(4px);
        }
        .step-number {
            flex-shrink: 0;
            width: 2.5rem;
            height: 2.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
        }
        .step-content h4 {
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 0.25rem;
            color: var(--text);
        }
        .step-content p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--secondary) 0%, #0f2740 100%);
            color: #fff;
            padding: 3.5rem 0;
            text-align: center;
        }
        .cta-section h2 {
            font-size: clamp(1.5rem, 3vw, 2.2rem);
            font-weight: 700;
            margin-bottom: 0.75rem;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.7);
            max-width: 550px;
            margin: 0 auto 1.75rem;
            font-size: 1rem;
            line-height: 1.7;
        }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.8rem 2.25rem;
            background: var(--primary);
            color: #fff;
            border-radius: 2rem;
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition);
            box-shadow: 0 4px 16px rgba(230, 57, 70, 0.35);
            border: none;
            cursor: pointer;
        }
        .cta-section .btn-cta:hover {
            background: #c62832;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(230, 57, 70, 0.45);
        }

        /* ===== Tags / Badges ===== */
        .tag {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            padding: 0.25rem 0.75rem;
            border-radius: 2rem;
            font-size: 0.75rem;
            font-weight: 600;
            background: var(--primary-light);
            color: var(--primary);
        }
        .tag.secondary {
            background: #e8edf3;
            color: var(--secondary);
        }
        .tag.accent {
            background: #fef6ee;
            color: #b3672d;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--surface-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 3.5rem 0 1.5rem;
        }
        .site-footer .nav-logo {
            color: #fff;
            margin-bottom: 0.75rem;
        }
        .site-footer .nav-logo i {
            color: var(--primary);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
            margin-bottom: 2.5rem;
        }
        @media (min-width: 640px) {
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (min-width: 1024px) {
            .footer-grid {
                grid-template-columns: 2fr 1fr 1fr 1fr;
            }
        }
        .footer-brand p {
            font-size: 0.875rem;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            margin-bottom: 1rem;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.85rem;
            transition: color var(--transition);
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .footer-col ul li a i {
            font-size: 0.9rem;
            width: 1.1rem;
            text-align: center;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 1.5rem;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
            align-items: center;
            text-align: center;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.4);
        }
        @media (min-width: 768px) {
            .footer-bottom {
                flex-direction: row;
                justify-content: space-between;
            }
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            transition: color var(--transition);
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        /* ===== Utility ===== */
        .text-muted {
            color: var(--text-muted);
        }
        .text-primary {
            color: var(--primary);
        }
        .gap-1 {
            gap: 0.5rem;
        }
        .gap-2 {
            gap: 1rem;
        }
        .gap-3 {
            gap: 1.5rem;
        }
        .mt-2 {
            margin-top: 1rem;
        }
        .mt-3 {
            margin-top: 1.5rem;
        }
        .mb-2 {
            margin-bottom: 1rem;
        }
        .mb-3 {
            margin-bottom: 1.5rem;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            display: flex;
            flex-wrap: wrap;
        }

        /* ===== Responsive ===== */
        @media (max-width: 639px) {
            .section {
                padding: 2.5rem 0;
            }
            .hero-section {
                padding: 2.5rem 0 2rem;
            }
            .hero-section h1 {
                font-size: 1.75rem;
            }
            .hero-section p {
                font-size: 0.95rem;
            }
            .card {
                padding: 1.25rem;
            }
            .step-item {
                padding: 1rem 1.25rem;
            }
            .footer-grid {
                gap: 1.5rem;
            }
        }
        @media (min-width: 640px) and (max-width: 1023px) {
            .hero-section h1 {
                font-size: 2.4rem;
            }
            .section {
                padding: 3rem 0;
            }
        }

        /* ===== Skeleton / Loading fade ===== */
        .fade-in {
            animation: fadeIn 0.6s ease-out forwards;
        }
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(12px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* ===== Print ===== */
        @media print {
            .site-header,
            .site-footer,
            .nav-toggle,
            .mobile-menu,
            .hero-actions .btn-primary,
            .hero-actions .btn-outline,
            .cta-section .btn-cta {
                display: none !important;
            }
            .hero-section {
                background: #fff !important;
                color: #000 !important;
                padding: 1rem 0;
            }
            .hero-section p {
                color: #555 !important;
            }
            .card {
                box-shadow: none !important;
                border: 1px solid #ddd;
            }
            .section {
                padding: 1.5rem 0;
                page-break-inside: avoid;
            }
        }