/* roulang page: index */
:root {
            --brand-dark: #1a3a4a;
            --brand-mid: #2d7a91;
            --brand-light: #5aadc4;
            --accent-green: #10b981;
            --slate-100: #f1f5f9;
            --slate-200: #e2e8f0;
            --slate-300: #cbd5e1;
            --slate-400: #94a3b8;
            --slate-600: #475569;
            --slate-700: #334155;
            --slate-800: #1e293b;
            --slate-900: #0f172a;
            --radius-sm: 0.375rem;
            --radius-md: 0.5rem;
            --radius-lg: 0.75rem;
            --radius-xl: 1rem;
            --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 32px rgba(0,0,0,0.10);
            --shadow-xl: 0 20px 48px rgba(0,0,0,0.12);
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
            line-height: 1.6;
            background-color: #f8fafc;
            color: var(--slate-800);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--brand-mid);
        }

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

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

        .container {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

        @media (min-width: 768px) {
            .container {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

        @media (min-width: 1024px) {
            .container {
                padding-left: 2.5rem;
                padding-right: 2.5rem;
            }
        }

        /* Header & Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--slate-200);
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
            transition: var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
        }

        .nav-link {
            position: relative;
            padding: 0.5rem 0.25rem;
            font-weight: 500;
            color: var(--slate-600);
            transition: var(--transition);
            letter-spacing: 0.01em;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--brand-mid);
            border-radius: 2px;
            transition: var(--transition);
        }
        .nav-link:hover {
            color: var(--brand-dark);
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-link.active {
            color: var(--brand-dark);
            font-weight: 600;
        }
        .nav-link.active::after {
            width: 100%;
            background: var(--brand-mid);
        }

        .mobile-nav {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }
        .mobile-nav.open {
            max-height: 600px;
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.625rem 1.5rem;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.9375rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--brand-mid);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--brand-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(45, 122, 145, 0.30);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(45, 122, 145, 0.25);
        }
        .btn-outline {
            background: transparent;
            color: var(--brand-mid);
            border: 1.5px solid var(--brand-mid);
        }
        .btn-outline:hover {
            background: var(--brand-mid);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(45, 122, 145, 0.20);
        }
        .btn-outline:active {
            transform: translateY(0);
        }
        .btn-accent {
            background: var(--accent-green);
            color: #fff;
        }
        .btn-accent:hover {
            background: #059669;
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(16, 185, 129, 0.30);
        }
        .btn-sm {
            padding: 0.375rem 1rem;
            font-size: 0.8125rem;
            border-radius: var(--radius-sm);
        }
        .btn-lg {
            padding: 0.875rem 2rem;
            font-size: 1.0625rem;
            border-radius: var(--radius-lg);
        }

        /* Cards */
        .card {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--slate-200);
            transition: var(--transition);
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: var(--brand-light);
        }

        .card-stat {
            background: #fff;
            border-radius: var(--radius-xl);
            padding: 1.75rem 1.5rem;
            border: 1px solid var(--slate-200);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            text-align: center;
        }
        .card-stat:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: var(--brand-light);
        }

        /* Badge / Tag */
        .badge {
            display: inline-block;
            padding: 0.2rem 0.75rem;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 500;
            background: var(--slate-100);
            color: var(--slate-600);
            border: 1px solid var(--slate-200);
            transition: var(--transition);
        }
        .badge-brand {
            background: #e0f0f5;
            color: var(--brand-mid);
            border-color: #b8dde8;
        }
        .badge-accent {
            background: #d1fae5;
            color: #065f46;
            border-color: #a7f3d0;
        }
        .badge:hover {
            background: var(--brand-mid);
            color: #fff;
            border-color: var(--brand-mid);
        }

        /* Section spacing */
        .section {
            padding: 4rem 0;
        }
        @media (min-width: 768px) {
            .section {
                padding: 5rem 0;
            }
        }
        @media (min-width: 1024px) {
            .section {
                padding: 6rem 0;
            }
        }

        .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--slate-900);
            letter-spacing: -0.02em;
            line-height: 1.3;
        }
        @media (min-width: 768px) {
            .section-title {
                font-size: 2rem;
            }
        }
        @media (min-width: 1024px) {
            .section-title {
                font-size: 2.25rem;
            }
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--slate-600);
            max-width: 640px;
            line-height: 1.7;
        }

        /* Hero */
        .hero {
            background: linear-gradient(135deg, #f0f7fa 0%, #e0f0f5 40%, #d4e8f0 100%);
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -15%;
            width: 50%;
            height: 80%;
            background: radial-gradient(circle, rgba(90, 173, 196, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -10%;
            width: 40%;
            height: 60%;
            background: radial-gradient(circle, rgba(45, 122, 145, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        /* Timeline / Process */
        .process-step {
            display: flex;
            align-items: flex-start;
            gap: 1.25rem;
            position: relative;
        }
        .process-step:not(:last-child)::after {
            content: '';
            position: absolute;
            left: 1.15rem;
            top: 3.2rem;
            bottom: -1.5rem;
            width: 2px;
            background: var(--slate-200);
        }
        .process-step-icon {
            flex-shrink: 0;
            width: 2.5rem;
            height: 2.5rem;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--brand-mid);
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            position: relative;
            z-index: 1;
        }

        /* FAQ */
        .faq-item {
            border: 1px solid var(--slate-200);
            border-radius: var(--radius-md);
            background: #fff;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--brand-light);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            padding: 1.125rem 1.25rem;
            font-weight: 600;
            color: var(--slate-800);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 0.75rem;
            user-select: none;
        }
        .faq-question i {
            transition: transform 0.3s ease;
            color: var(--slate-400);
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 1.25rem;
            color: var(--slate-600);
            font-size: 0.9375rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 1.25rem 1.125rem;
        }

        /* Footer */
        .site-footer {
            background: var(--slate-900);
            color: var(--slate-300);
            border-top: 1px solid var(--slate-700);
        }
        .site-footer a {
            color: var(--slate-400);
        }
        .site-footer a:hover {
            color: var(--brand-light);
        }

        /* CTA section */
        .cta-section {
            background: linear-gradient(135deg, var(--brand-dark) 0%, #0f2633 100%);
            color: #fff;
        }

        /* Misc */
        .divider {
            height: 1px;
            background: var(--slate-200);
            border: none;
            margin: 0;
        }

        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }

        .search-input {
            border: 1.5px solid var(--slate-200);
            border-radius: 9999px;
            padding: 0.5rem 1.25rem;
            font-size: 0.875rem;
            background: var(--slate-100);
            transition: var(--transition);
            outline: none;
            width: 100%;
        }
        .search-input:focus {
            border-color: var(--brand-light);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(90, 173, 196, 0.15);
        }

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

        /* Post card */
        .post-card {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--slate-200);
            padding: 1.5rem;
            transition: var(--transition);
        }
        .post-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: var(--brand-light);
        }
        .post-card .post-title {
            font-size: 1.0625rem;
            font-weight: 600;
            color: var(--slate-900);
            line-height: 1.4;
            transition: var(--transition);
        }
        .post-card:hover .post-title {
            color: var(--brand-mid);
        }
        .post-card .post-excerpt {
            font-size: 0.875rem;
            color: var(--slate-600);
            line-height: 1.6;
            margin-top: 0.5rem;
        }
        .post-card .post-meta {
            font-size: 0.75rem;
            color: var(--slate-400);
            display: flex;
            align-items: center;
            gap: 0.75rem;
            margin-top: 0.75rem;
        }

        /* Empty state */
        .empty-state {
            text-align: center;
            padding: 3rem 1.5rem;
            color: var(--slate-400);
            font-size: 0.9375rem;
        }

        /* Focus visible for accessibility */
        *:focus-visible {
            outline: 2px solid var(--brand-light);
            outline-offset: 2px;
        }

        /* Responsive nav tweaks */
        @media (max-width: 767px) {
            .nav-desktop {
                display: none;
            }
            .nav-mobile-toggle {
                display: flex;
            }
            .section {
                padding: 3rem 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .hero {
                padding-top: 3rem !important;
                padding-bottom: 3rem !important;
            }
        }
        @media (min-width: 768px) {
            .nav-mobile-toggle {
                display: none;
            }
            .nav-desktop {
                display: flex;
            }
            .mobile-nav {
                max-height: 0 !important;
            }
        }

        /* Smooth fade-in for cards */
        .fade-up {
            opacity: 0;
            transform: translateY(20px);
            animation: fadeUp 0.6s ease forwards;
        }
        @keyframes fadeUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .fade-up:nth-child(2) {
            animation-delay: 0.1s;
        }
        .fade-up:nth-child(3) {
            animation-delay: 0.2s;
        }
        .fade-up:nth-child(4) {
            animation-delay: 0.3s;
        }
        .fade-up:nth-child(5) {
            animation-delay: 0.4s;
        }
        .fade-up:nth-child(6) {
            animation-delay: 0.5s;
        }

        /* Scrollbar subtle */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--slate-100);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--slate-300);
            border-radius: 3px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--slate-400);
        }

/* roulang page: article */
:root { --brand-50: #eef7ff; --brand-100: #d9edff; --brand-200: #bce0ff; --brand-300: #8eccff; --brand-400: #53b0ff; --brand-500: #2b8fff; --brand-600: #1a6ef5; --brand-700: #1458e0; --brand-800: #1748b5; --brand-900: #1a3f8f; --brand-light: #8eccff; --accent: #22c55e; --surface: #f8fafc; --card: #ffffff; --muted: #64748b; --subtle: #94a3b8; --border: #e2e8f0; --radius: 0.75rem; --shadow-soft: 0 4px 20px rgba(0,0,0,0.06); --shadow-card: 0 8px 32px rgba(0,0,0,0.08); }
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif; background: var(--surface); color: #0f172a; line-height: 1.7; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; transition: color 0.2s; }
img { max-width: 100%; height: auto; display: block; }
input, button, textarea { font-family: inherit; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 1.25rem; }
@media (min-width: 768px) { .container { padding: 0 2rem; } }
@media (min-width: 1024px) { .container { padding: 0 3rem; } }
.section { padding: 4rem 0; }
@media (min-width: 768px) { .section { padding: 5rem 0; } }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; padding: 0.625rem 1.5rem; font-size: 0.9375rem; font-weight: 500; border-radius: var(--radius); border: none; cursor: pointer; transition: all 0.25s; text-decoration: none; line-height: 1.4; }
.btn:focus-visible { outline: 2px solid var(--brand-500); outline-offset: 2px; }
.btn-primary { background: var(--brand-600); color: #fff; box-shadow: 0 2px 8px rgba(26,110,245,0.3); }
.btn-primary:hover { background: var(--brand-700); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(26,110,245,0.35); }
.btn-primary:active { transform: translateY(0); box-shadow: 0 2px 6px rgba(26,110,245,0.25); }
.btn-sm { padding: 0.4rem 1rem; font-size: 0.8125rem; border-radius: 0.5rem; }
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,0.96); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); box-shadow: 0 1px 4px rgba(0,0,0,0.04); transition: box-shadow 0.3s; }
.site-header.scrolled { box-shadow: 0 4px 20px rgba(0,0,0,0.08); }
.nav-desktop { display: none; }
@media (min-width: 768px) { .nav-desktop { display: flex; } }
.nav-link { position: relative; color: #475569; font-weight: 500; padding: 0.5rem 0.75rem; border-radius: 0.5rem; transition: all 0.2s; white-space: nowrap; }
.nav-link:hover { color: var(--brand-700); background: var(--brand-50); }
.nav-link.active { color: var(--brand-700); background: var(--brand-50); font-weight: 600; }
.nav-link.active::after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 1.25rem; height: 3px; background: var(--brand-500); border-radius: 2px; }
.search-input { background: #f1f5f9; border: 1px solid var(--border); border-radius: 0.5rem; color: #0f172a; font-size: 0.875rem; transition: all 0.25s; }
.search-input:focus { outline: none; border-color: var(--brand-400); background: #fff; box-shadow: 0 0 0 3px rgba(43,143,255,0.12); }
.search-input::placeholder { color: #94a3b8; }
.mobile-nav { display: none; overflow: hidden; transition: max-height 0.35s ease; }
.mobile-nav.open { display: block; }
.nav-mobile-toggle { display: block; }
@media (min-width: 768px) { .nav-mobile-toggle { display: none; } }
.article-hero { background: linear-gradient(135deg, #1a3f8f 0%, #1458e0 50%, #1a6ef5 100%); padding: 3rem 0 2.5rem; position: relative; overflow: hidden; }
.article-hero::before { 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='0.05'%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"); opacity: 0.4; }
.article-body { font-size: 1.0625rem; line-height: 1.85; color: #1e293b; }
.article-body h2 { font-size: 1.5rem; font-weight: 700; margin: 2rem 0 0.75rem; color: #0f172a; padding-bottom: 0.5rem; border-bottom: 2px solid var(--brand-100); }
.article-body h3 { font-size: 1.25rem; font-weight: 600; margin: 1.5rem 0 0.5rem; color: #1e293b; }
.article-body p { margin-bottom: 1.25rem; }
.article-body ul, .article-body ol { margin: 0 0 1.25rem 1.5rem; }
.article-body li { margin-bottom: 0.4rem; }
.article-body a { color: var(--brand-600); text-decoration: underline; text-underline-offset: 2px; }
.article-body a:hover { color: var(--brand-700); }
.article-body blockquote { border-left: 4px solid var(--brand-300); background: var(--brand-50); padding: 1rem 1.5rem; margin: 1.5rem 0; border-radius: 0 0.5rem 0.5rem 0; color: #334155; }
.article-body img { border-radius: 0.75rem; margin: 1.5rem 0; box-shadow: var(--shadow-soft); }
.article-body code { background: #f1f5f9; padding: 0.15rem 0.5rem; border-radius: 0.375rem; font-size: 0.9em; color: #e11d48; }
.article-body pre { background: #0f172a; color: #e2e8f0; padding: 1.25rem; border-radius: 0.75rem; overflow-x: auto; margin: 1.5rem 0; }
.article-body pre code { background: transparent; color: inherit; padding: 0; }
.tag { display: inline-block; padding: 0.2rem 0.75rem; font-size: 0.75rem; font-weight: 500; border-radius: 999px; background: var(--brand-50); color: var(--brand-700); border: 1px solid var(--brand-200); transition: all 0.2s; }
.tag:hover { background: var(--brand-100); border-color: var(--brand-300); }
.related-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.25rem; transition: all 0.3s; box-shadow: var(--shadow-soft); }
.related-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-card); border-color: var(--brand-200); }
.breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: 0.35rem; font-size: 0.8125rem; color: #94a3b8; }
.breadcrumb a { color: #94a3b8; }
.breadcrumb a:hover { color: var(--brand-600); }
.breadcrumb .sep { color: #cbd5e1; }
.site-footer { background: #0f172a; color: #94a3b8; }
.site-footer a { color: #94a3b8; transition: color 0.2s; }
.site-footer a:hover { color: var(--brand-light); }
@media (max-width: 639px) { .article-hero { padding: 2rem 0 1.5rem; } .article-body { font-size: 1rem; } }

/* roulang page: category1 */
/* 设计变量与基础重置 */
        :root {
            --brand-50: #f0f7ff;
            --brand-100: #e0effe;
            --brand-200: #baddfd;
            --brand-300: #7fc2fb;
            --brand-400: #4ba3f7;
            --brand-500: #1a7ae2;
            --brand-600: #0f5cb5;
            --brand-700: #0d4a94;
            --brand-800: #0f3f77;
            --brand-900: #123563;
            --brand-950: #0a1f3d;
            --brand-light: #7fc2fb;
            --slate-50: #f8fafc;
            --slate-100: #f1f5f9;
            --slate-200: #e2e8f0;
            --slate-300: #cbd5e1;
            --slate-400: #94a3b8;
            --slate-500: #64748b;
            --slate-600: #475569;
            --slate-700: #334155;
            --slate-800: #1e293b;
            --slate-900: #0f172a;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 16px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow: 0 4px 14px rgba(0, 0, 0, 0.07);
            --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.10);
            --transition: all 0.25s ease;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            background: var(--slate-50);
            color: var(--slate-800);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            outline: none;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }
        @media (min-width: 768px) {
            .container {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }
        /* 导航样式 */
        .site-header {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--slate-200);
            position: sticky;
            top: 0;
            z-index: 100;
            transition: var(--transition);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }
        .nav-desktop {
            display: flex;
            align-items: center;
        }
        .nav-desktop .nav-link {
            color: var(--slate-600);
            font-weight: 500;
            border-radius: var(--radius-sm);
            padding: 0.5rem 0.75rem;
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-desktop .nav-link:hover {
            color: var(--brand-600);
            background: var(--brand-50);
        }
        .nav-desktop .nav-link.active {
            color: var(--brand-700);
            background: var(--brand-100);
            font-weight: 600;
        }
        .nav-desktop .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 3px;
            background: var(--brand-500);
            border-radius: 3px 3px 0 0;
        }
        .search-input {
            background: var(--slate-100);
            border: 1px solid var(--slate-200);
            border-radius: 999px;
            font-size: 0.875rem;
            transition: var(--transition);
        }
        .search-input:focus {
            border-color: var(--brand-400);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(26, 122, 226, 0.15);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            cursor: pointer;
            border: none;
            font-size: 0.875rem;
            padding: 0.625rem 1.25rem;
        }
        .btn-primary {
            background: var(--brand-600);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--brand-700);
            transform: translateY(-1px);
            box-shadow: var(--shadow);
        }
        .btn-primary:active {
            transform: scale(0.97);
        }
        .btn-outline {
            background: transparent;
            color: var(--brand-600);
            border: 1.5px solid var(--brand-500);
        }
        .btn-outline:hover {
            background: var(--brand-50);
            border-color: var(--brand-600);
        }
        .btn-sm {
            font-size: 0.8rem;
            padding: 0.4rem 1rem;
        }
        .btn-lg {
            font-size: 1rem;
            padding: 0.75rem 1.75rem;
            border-radius: var(--radius);
        }
        .mobile-nav {
            display: none;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, opacity 0.25s ease;
            opacity: 0;
        }
        .mobile-nav.open {
            display: block;
            max-height: 500px;
            opacity: 1;
        }
        .nav-mobile-toggle {
            display: flex;
        }
        @media (min-width: 768px) {
            .nav-mobile-toggle {
                display: none;
            }
            .nav-desktop {
                display: flex;
            }
        }
        @media (max-width: 767px) {
            .nav-desktop {
                display: none;
            }
            .mobile-nav {
                display: block;
            }
        }
        /* 板块通用 */
        .section {
            padding: 3.5rem 0;
        }
        @media (min-width: 768px) {
            .section {
                padding: 5rem 0;
            }
        }
        .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--slate-900);
            letter-spacing: -0.02em;
            line-height: 1.3;
        }
        .section-subtitle {
            font-size: 1rem;
            color: var(--slate-500);
            max-width: 580px;
        }
        @media (min-width: 768px) {
            .section-title {
                font-size: 2.25rem;
            }
            .section-subtitle {
                font-size: 1.1rem;
            }
        }
        /* 卡片 */
        .card {
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            overflow: hidden;
            border: 1px solid var(--slate-100);
        }
        .card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }
        .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background: var(--slate-200);
        }
        .card-body {
            padding: 1.25rem;
        }
        .card-tag {
            display: inline-block;
            background: var(--brand-50);
            color: var(--brand-700);
            font-size: 0.7rem;
            font-weight: 600;
            padding: 0.2rem 0.7rem;
            border-radius: 999px;
            letter-spacing: 0.02em;
        }
        .badge {
            display: inline-flex;
            align-items: center;
            background: var(--slate-100);
            color: var(--slate-600);
            font-size: 0.7rem;
            font-weight: 500;
            padding: 0.2rem 0.7rem;
            border-radius: 999px;
            gap: 0.3rem;
        }
        .badge-brand {
            background: var(--brand-100);
            color: var(--brand-700);
        }
        /* FAQ */
        .faq-item {
            border-bottom: 1px solid var(--slate-200);
            padding: 1.1rem 0;
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-question {
            font-weight: 600;
            color: var(--slate-800);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: var(--transition);
            font-size: 1rem;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            padding: 0.25rem 0;
        }
        .faq-question:hover {
            color: var(--brand-600);
        }
        .faq-question .icon {
            font-size: 1.2rem;
            transition: transform 0.3s;
            color: var(--slate-400);
        }
        .faq-question.open .icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            color: var(--slate-500);
            font-size: 0.95rem;
            padding: 0 0.5rem 0 0;
        }
        .faq-answer.open {
            max-height: 200px;
            padding-top: 0.75rem;
        }
        /* 页脚 */
        .site-footer {
            background: var(--slate-900);
            color: var(--slate-300);
        }
        .site-footer a {
            color: var(--slate-400);
        }
        .site-footer a:hover {
            color: var(--brand-light);
        }
        /* 统计数字 */
        .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--brand-600);
            line-height: 1.2;
        }
        @media (min-width: 768px) {
            .stat-number {
                font-size: 2.8rem;
            }
        }
        .stat-label {
            font-size: 0.85rem;
            color: var(--slate-500);
            font-weight: 500;
        }
        /* 分类标签 */
        .filter-tag {
            display: inline-block;
            padding: 0.45rem 1.2rem;
            border-radius: 999px;
            font-size: 0.85rem;
            font-weight: 500;
            background: #fff;
            border: 1.5px solid var(--slate-200);
            color: var(--slate-600);
            cursor: pointer;
            transition: var(--transition);
        }
        .filter-tag:hover {
            border-color: var(--brand-400);
            color: var(--brand-600);
            background: var(--brand-50);
        }
        .filter-tag.active {
            background: var(--brand-600);
            border-color: var(--brand-600);
            color: #fff;
        }
        /* Hero */
        .hero-category {
            background: linear-gradient(135deg, #0f3f77 0%, #1a7ae2 50%, #4ba3f7 100%);
            color: #fff;
            padding: 4rem 0 3.5rem;
        }
        .hero-category h1 {
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.2;
        }
        .hero-category p {
            font-size: 1.05rem;
            opacity: 0.9;
            max-width: 620px;
        }
        @media (min-width: 768px) {
            .hero-category {
                padding: 5.5rem 0 4.5rem;
            }
            .hero-category h1 {
                font-size: 3rem;
            }
        }
        /* 响应式网格辅助 */
        .grid-cards {
            display: grid;
            gap: 1.5rem;
        }
        @media (min-width: 640px) {
            .grid-cards {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (min-width: 1024px) {
            .grid-cards {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        /* 图文列表 */
        .media-item {
            display: flex;
            gap: 1rem;
            padding: 1rem 0;
            border-bottom: 1px solid var(--slate-100);
            align-items: flex-start;
        }
        .media-item:last-child {
            border-bottom: none;
        }
        .media-thumb {
            width: 80px;
            height: 80px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            background: var(--slate-200);
            flex-shrink: 0;
        }
        @media (min-width: 640px) {
            .media-thumb {
                width: 100px;
                height: 100px;
            }
        }
        /* 过渡动画 */
        .fade-in {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-in.show {
            opacity: 1;
            transform: translateY(0);
        }
        /* 自定义滚动条 */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--slate-100);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--slate-300);
            border-radius: 8px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--slate-400);
        }
        /* 分页占位 */
        .pagination {
            display: flex;
            gap: 0.5rem;
            justify-content: center;
            flex-wrap: wrap;
        }
        .pagination .page-item {
            display: inline-flex;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: #fff;
            border: 1px solid var(--slate-200);
            color: var(--slate-600);
            font-weight: 500;
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .pagination .page-item:hover {
            border-color: var(--brand-400);
            color: var(--brand-600);
        }
        .pagination .page-item.active {
            background: var(--brand-600);
            border-color: var(--brand-600);
            color: #fff;
        }
        /* 面包屑 */
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem 0.8rem;
            font-size: 0.85rem;
            color: var(--slate-400);
            padding: 0.75rem 0;
        }
        .breadcrumb a {
            color: var(--slate-400);
        }
        .breadcrumb a:hover {
            color: var(--brand-600);
        }
        .breadcrumb span {
            color: var(--slate-600);
        }
        .breadcrumb .sep {
            color: var(--slate-300);
        }

/* roulang page: category2 */
/* ===== Design Variables ===== */
        :root {
            --brand-50: #eef2ff;
            --brand-100: #e0e7ff;
            --brand-200: #c7d2fe;
            --brand-300: #a5b4fc;
            --brand-400: #818cf8;
            --brand-500: #6366f1;
            --brand-600: #4f46e5;
            --brand-700: #4338ca;
            --brand-800: #3730a3;
            --brand-900: #312e81;
            --brand-light: #a5b4fc;
            --bg-body: #f8fafc;
            --text-primary: #1e293b;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --border-light: #e2e8f0;
            --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
            --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
            --radius-sm: 0.375rem;
            --radius-md: 0.5rem;
            --radius-lg: 0.75rem;
            --radius-xl: 1rem;
            --transition: all 0.2s ease-in-out;
        }

        /* ===== Tailwind Custom ===== */
        tailwind.config = {
            theme: {
                extend: {
                    colors: {
                        brand: {
                            50: '#eef2ff', 100: '#e0e7ff', 200: '#c7d2fe', 300: '#a5b4fc',
                            400: '#818cf8', 500: '#6366f1', 600: '#4f46e5', 700: '#4338ca',
                            800: '#3730a3', 900: '#312e81'
                        }
                    },
                    fontFamily: {
                        sans: ['Inter', 'system-ui', '-apple-system', 'Segoe UI', 'Roboto', 'Helvetica Neue', 'Noto Sans', 'sans-serif']
                    }
                }
            }
        }

        /* ===== Base Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            margin: 0;
            font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', 'Noto Sans', sans-serif;
            font-size: 1rem;
            line-height: 1.6;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--brand-600);
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
            padding: 0;
        }
        :focus-visible {
            outline: 2px solid var(--brand-400);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        /* ===== Container ===== */
        .container {
            width: 100%;
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }
        @media (min-width: 768px) {
            .container {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }
        @media (min-width: 1024px) {
            .container {
                padding-left: 2.5rem;
                padding-right: 2.5rem;
            }
        }

        /* ===== Section ===== */
        .section {
            padding: 3.5rem 0;
        }
        @media (min-width: 768px) {
            .section {
                padding: 5rem 0;
            }
        }
        @media (min-width: 1024px) {
            .section {
                padding: 6rem 0;
            }
        }
        .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
        }
        @media (min-width: 768px) {
            .section-title {
                font-size: 2.25rem;
            }
        }
        .section-subtitle {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 560px;
            margin-top: 0.25rem;
            line-height: 1.6;
        }
        @media (min-width: 768px) {
            .section-subtitle {
                font-size: 1.125rem;
            }
        }

        /* ===== Header & Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }
        .nav-desktop {
            display: none;
        }
        @media (min-width: 768px) {
            .nav-desktop {
                display: flex;
                align-items: center;
            }
        }
        .nav-link {
            position: relative;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 0.5rem 0.75rem;
            border-radius: var(--radius-md);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-link:hover {
            color: var(--brand-600);
            background: var(--brand-50);
        }
        .nav-link.active {
            color: var(--brand-700);
            background: var(--brand-50);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 2px;
            background: var(--brand-500);
            border-radius: 1px;
        }
        @media (min-width: 768px) {
            .nav-link {
                padding: 0.5rem 1rem;
            }
        }

        /* Search Input */
        .search-input {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            background: #f1f5f9;
            color: var(--text-primary);
            transition: var(--transition);
        }
        .search-input:focus {
            outline: none;
            border-color: var(--brand-300);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
        }
        .search-input::placeholder {
            color: var(--text-muted);
            font-size: 0.875rem;
        }

        /* Mobile Nav */
        .mobile-nav {
            display: none;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, opacity 0.25s ease;
            opacity: 0;
        }
        .mobile-nav.open {
            display: block;
            max-height: 500px;
            opacity: 1;
        }
        .nav-mobile-toggle {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        @media (min-width: 768px) {
            .nav-mobile-toggle {
                display: none;
            }
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            font-weight: 600;
            border-radius: var(--radius-lg);
            transition: var(--transition);
            border: 1px solid transparent;
            cursor: pointer;
            text-align: center;
            white-space: nowrap;
        }
        .btn:active {
            transform: scale(0.97);
        }
        .btn-primary {
            background: var(--brand-600);
            color: #fff;
            border-color: var(--brand-600);
            box-shadow: var(--shadow-sm);
        }
        .btn-primary:hover {
            background: var(--brand-700);
            border-color: var(--brand-700);
            color: #fff;
            box-shadow: var(--shadow-md);
        }
        .btn-primary:focus-visible {
            outline: 2px solid var(--brand-400);
            outline-offset: 2px;
        }
        .btn-outline {
            background: transparent;
            color: var(--brand-600);
            border-color: var(--brand-300);
        }
        .btn-outline:hover {
            background: var(--brand-50);
            border-color: var(--brand-400);
            color: var(--brand-700);
        }
        .btn-white {
            background: #fff;
            color: var(--brand-600);
            border-color: #fff;
        }
        .btn-white:hover {
            background: #f1f5f9;
            color: var(--brand-700);
            box-shadow: var(--shadow-md);
        }
        .btn-sm {
            padding: 0.5rem 1rem;
            font-size: 0.875rem;
        }
        .btn-md {
            padding: 0.625rem 1.5rem;
            font-size: 0.9375rem;
        }
        .btn-lg {
            padding: 0.75rem 2rem;
            font-size: 1.0625rem;
        }

        /* ===== Cards ===== */
        .card {
            background: #fff;
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            overflow: hidden;
        }
        .card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }
        .card-body {
            padding: 1.5rem;
        }
        .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-bottom: 1px solid var(--border-light);
        }

        /* ===== Badge ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
            padding: 0.2rem 0.75rem;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 9999px;
            background: var(--brand-50);
            color: var(--brand-700);
            border: 1px solid var(--brand-200);
            white-space: nowrap;
        }
        .badge-green {
            background: #ecfdf5;
            color: #065f46;
            border-color: #a7f3d0;
        }
        .badge-amber {
            background: #fffbeb;
            color: #92400e;
            border-color: #fde68a;
        }
        .badge-blue {
            background: #eff6ff;
            color: #1e40af;
            border-color: #bfdbfe;
        }

        /* ===== Tag ===== */
        .tag {
            display: inline-block;
            padding: 0.2rem 0.6rem;
            font-size: 0.75rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: #f1f5f9;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .tag:hover {
            background: var(--brand-50);
            color: var(--brand-600);
            border-color: var(--brand-200);
        }

        /* ===== Stat Number ===== */
        .stat-number {
            font-size: 2.25rem;
            font-weight: 800;
            line-height: 1;
            color: var(--brand-600);
            letter-spacing: -0.02em;
        }
        @media (min-width: 768px) {
            .stat-number {
                font-size: 3rem;
            }
        }
        .stat-label {
            font-size: 0.875rem;
            color: var(--text-muted);
            margin-top: 0.25rem;
        }

        /* ===== FAQ ===== */
        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: 1.25rem 0;
        }
        .faq-item:first-child {
            padding-top: 0;
        }
        .faq-question {
            font-weight: 600;
            font-size: 1.0625rem;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--brand-600);
        }
        .faq-question .icon {
            flex-shrink: 0;
            color: var(--brand-400);
            transition: transform 0.25s ease;
            font-size: 1.125rem;
        }
        .faq-item.active .faq-question .icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.25s ease;
            padding-top: 0;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding-top: 0.75rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--brand-700) 0%, var(--brand-500) 100%);
            color: #fff;
            border-radius: var(--radius-xl);
            padding: 3rem 2rem;
            text-align: center;
        }
        @media (min-width: 768px) {
            .cta-section {
                padding: 4rem 3rem;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
        }
        .site-footer a {
            color: #94a3b8;
        }
        .site-footer a:hover {
            color: var(--brand-light);
        }

        /* ===== Hero ===== */
        .hero-guide {
            background: linear-gradient(135deg, #1e1b4b 0%, #312e81 40%, #3730a3 100%);
            color: #fff;
            padding: 4rem 0 3.5rem;
            position: relative;
            overflow: hidden;
        }
        .hero-guide::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;
        }
        @media (min-width: 768px) {
            .hero-guide {
                padding: 5.5rem 0 4.5rem;
            }
        }

        /* ===== Steps ===== */
        .step-item {
            display: flex;
            gap: 1.25rem;
            align-items: flex-start;
            padding: 1.25rem 0;
            border-bottom: 1px dashed var(--border-light);
        }
        .step-item:last-child {
            border-bottom: none;
        }
        .step-number {
            flex-shrink: 0;
            width: 2.5rem;
            height: 2.5rem;
            border-radius: 50%;
            background: var(--brand-100);
            color: var(--brand-700);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.125rem;
        }

        /* ===== Grid helpers ===== */
        .grid-auto {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.5rem;
        }
        @media (min-width: 768px) {
            .grid-auto {
                gap: 2rem;
            }
        }

        /* ===== Responsive ===== */
        @media (max-width: 520px) {
            .section-title {
                font-size: 1.5rem;
            }
            .hero-guide h1 {
                font-size: 1.75rem !important;
            }
            .stat-number {
                font-size: 1.75rem;
            }
            .cta-section {
                padding: 2rem 1.25rem;
            }
            .card-body {
                padding: 1.25rem;
            }
            .btn-lg {
                padding: 0.625rem 1.25rem;
                font-size: 0.9375rem;
            }
        }

        /* Scrollbar */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: #f1f5f9;
        }
        ::-webkit-scrollbar-thumb {
            background: #c7d2fe;
            border-radius: 3px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #a5b4fc;
        }

        /* List reset */
        ul,
        ol {
            padding: 0;
            margin: 0;
            list-style: none;
        }

        /* ===== Print ===== */
        @media print {
            .site-header,
            .site-footer,
            .nav-mobile-toggle,
            .search-input {
                display: none !important;
            }
            .hero-guide {
                background: #1e293b !important;
                padding: 2rem 0 !important;
            }
            .card {
                box-shadow: none !important;
                border: 1px solid #e2e8f0 !important;
                transform: none !important;
            }
        }

/* roulang page: category3 */
/* ===== Design Variables ===== */
        :root {
            --brand-50: #f0fdf4;
            --brand-100: #dcfce7;
            --brand-200: #bbf7d0;
            --brand-300: #86efac;
            --brand-400: #4ade80;
            --brand-500: #22c55e;
            --brand-600: #16a34a;
            --brand-700: #15803d;
            --brand-800: #166534;
            --brand-900: #14532d;
            --brand-light: #86efac;
            --accent-50: #faf5ff;
            --accent-100: #f3e8ff;
            --accent-200: #e9d5ff;
            --accent-300: #d8b4fe;
            --accent-400: #c084fc;
            --accent-500: #a855f7;
            --accent-600: #9333ea;
            --slate-50: #f8fafc;
            --slate-100: #f1f5f9;
            --slate-200: #e2e8f0;
            --slate-300: #cbd5e1;
            --slate-400: #94a3b8;
            --slate-500: #64748b;
            --slate-600: #475569;
            --slate-700: #334155;
            --slate-800: #1e293b;
            --slate-900: #0f172a;
            --radius-sm: 0.375rem;
            --radius-md: 0.5rem;
            --radius-lg: 0.75rem;
            --radius-xl: 1rem;
            --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
            --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            line-height: 1.6;
            color: var(--slate-800);
            background: #fff;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            transition: var(--transition);
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }

        /* ===== Container ===== */
        .container {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }
        @media (min-width: 768px) {
            .container {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }
        @media (min-width: 1024px) {
            .container {
                padding-left: 2.5rem;
                padding-right: 2.5rem;
            }
        }

        /* ===== Section ===== */
        .section {
            padding-top: 4rem;
            padding-bottom: 4rem;
        }
        @media (min-width: 768px) {
            .section {
                padding-top: 5.5rem;
                padding-bottom: 5.5rem;
            }
        }
        .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            line-height: 1.25;
            color: var(--slate-900);
            letter-spacing: -0.01em;
        }
        .section-subtitle {
            font-size: 1rem;
            color: var(--slate-500);
            margin-top: 0.5rem;
            max-width: 36rem;
        }
        @media (min-width: 768px) {
            .section-title {
                font-size: 2.25rem;
            }
            .section-subtitle {
                font-size: 1.125rem;
                margin-top: 0.75rem;
            }
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            font-weight: 500;
            border-radius: var(--radius-md);
            padding: 0.625rem 1.25rem;
            font-size: 0.875rem;
            transition: var(--transition);
            border: 1px solid transparent;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn-sm {
            padding: 0.375rem 0.875rem;
            font-size: 0.8125rem;
            border-radius: var(--radius-sm);
        }
        .btn-primary {
            background: var(--brand-600);
            color: #fff;
            border-color: var(--brand-600);
        }
        .btn-primary:hover {
            background: var(--brand-700);
            border-color: var(--brand-700);
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }
        .btn-primary:focus-visible {
            outline: 2px solid var(--brand-400);
            outline-offset: 2px;
        }
        .btn-outline {
            background: transparent;
            color: var(--brand-600);
            border-color: var(--brand-300);
        }
        .btn-outline:hover {
            background: var(--brand-50);
            border-color: var(--brand-400);
            transform: translateY(-1px);
        }
        .btn-outline:focus-visible {
            outline: 2px solid var(--brand-400);
            outline-offset: 2px;
        }
        .btn-white {
            background: #fff;
            color: var(--brand-700);
            border-color: #fff;
        }
        .btn-white:hover {
            background: var(--slate-50);
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
            padding: 0.2rem 0.65rem;
            font-size: 0.75rem;
            font-weight: 500;
            border-radius: 9999px;
            line-height: 1.4;
            background: var(--brand-100);
            color: var(--brand-700);
            white-space: nowrap;
        }
        .badge-accent {
            background: var(--accent-100);
            color: var(--accent-600);
        }
        .badge-slate {
            background: var(--slate-100);
            color: var(--slate-600);
        }
        .badge-hot {
            background: #fef2f2;
            color: #dc2626;
        }

        /* ===== Card ===== */
        .card {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--slate-200);
            transition: var(--transition);
            overflow: hidden;
        }
        .card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
            border-color: var(--brand-200);
        }
        .card-image {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
            background: var(--slate-100);
        }
        .card-body {
            padding: 1.25rem;
        }
        .card-title {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--slate-900);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .card-text {
            font-size: 0.875rem;
            color: var(--slate-500);
            margin-top: 0.5rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.6;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 0.75rem;
            color: var(--slate-400);
            margin-top: 0.75rem;
            flex-wrap: wrap;
        }

        /* ===== Search Input ===== */
        .search-input {
            border: 1px solid var(--slate-200);
            border-radius: 9999px;
            background: var(--slate-50);
            padding: 0.5rem 1rem 0.5rem 2.25rem;
            font-size: 0.875rem;
            color: var(--slate-800);
            outline: none;
            transition: var(--transition);
            width: 100%;
        }
        .search-input:focus {
            border-color: var(--brand-400);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(22, 163, 74, 0.12);
        }
        .search-input::placeholder {
            color: var(--slate-400);
        }

        /* ===== Nav Desktop ===== */
        .nav-desktop {
            display: none;
        }
        @media (min-width: 1024px) {
            .nav-desktop {
                display: flex;
            }
        }
        .nav-link {
            position: relative;
            font-weight: 500;
            color: var(--slate-600);
            padding: 0.5rem 0.25rem;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-link:hover {
            color: var(--brand-600);
            background: var(--brand-50);
        }
        .nav-link.active {
            color: var(--brand-700);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 2.5px;
            background: var(--brand-500);
            border-radius: 2px;
        }
        .nav-link:focus-visible {
            outline: 2px solid var(--brand-400);
            outline-offset: 2px;
        }

        /* ===== Mobile Nav ===== */
        .mobile-nav {
            display: none;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }
        .mobile-nav.open {
            display: block;
            max-height: 500px;
        }
        @media (min-width: 1024px) {
            .mobile-nav {
                display: none !important;
            }
        }

        /* ===== Site Header (scrolled) ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--slate-100);
            transition: var(--transition);
        }

        /* ===== Hero ===== */
        .hero {
            background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 40%, #e9d5ff 100%);
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(74, 222, 128, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -5%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(168, 85, 247, 0.1) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        /* ===== News Card Variant ===== */
        .news-card {
            display: flex;
            flex-direction: column;
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--slate-200);
            transition: var(--transition);
            overflow: hidden;
        }
        .news-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
            border-color: var(--brand-200);
        }
        .news-card .news-thumb {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            background: var(--slate-100);
        }
        .news-card .news-body {
            padding: 1.25rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card .news-title {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--slate-900);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .news-title:hover {
            color: var(--brand-600);
        }
        .news-card .news-excerpt {
            font-size: 0.875rem;
            color: var(--slate-500);
            margin-top: 0.5rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }
        .news-card .news-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 1rem;
            padding-top: 0.75rem;
            border-top: 1px solid var(--slate-100);
            font-size: 0.75rem;
            color: var(--slate-400);
        }

        /* ===== Rank List ===== */
        .rank-item {
            display: flex;
            align-items: center;
            gap: 1rem;
            padding: 0.875rem 1rem;
            border-radius: var(--radius-md);
            transition: var(--transition);
            cursor: default;
        }
        .rank-item:hover {
            background: var(--brand-50);
        }
        .rank-number {
            width: 2rem;
            height: 2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.875rem;
            background: var(--slate-100);
            color: var(--slate-500);
            flex-shrink: 0;
        }
        .rank-item:nth-child(1) .rank-number {
            background: var(--brand-500);
            color: #fff;
        }
        .rank-item:nth-child(2) .rank-number {
            background: var(--brand-400);
            color: #fff;
        }
        .rank-item:nth-child(3) .rank-number {
            background: var(--brand-300);
            color: var(--brand-800);
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #14532d 0%, #166534 50%, #1e293b 100%);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(74, 222, 128, 0.12) 0%, transparent 60%);
            border-radius: 50%;
            pointer-events: none;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--slate-900);
            color: var(--slate-300);
        }
        .site-footer a {
            color: var(--slate-400);
        }
        .site-footer a:hover {
            color: var(--brand-light);
        }

        /* ===== Tags Cloud ===== */
        .tag-pill {
            display: inline-block;
            padding: 0.375rem 1rem;
            font-size: 0.8125rem;
            font-weight: 500;
            border-radius: 9999px;
            background: var(--slate-50);
            color: var(--slate-600);
            border: 1px solid var(--slate-200);
            transition: var(--transition);
            cursor: pointer;
        }
        .tag-pill:hover {
            background: var(--brand-50);
            color: var(--brand-700);
            border-color: var(--brand-300);
            transform: translateY(-1px);
        }
        .tag-pill.active {
            background: var(--brand-600);
            color: #fff;
            border-color: var(--brand-600);
        }

        /* ===== Responsive ===== */
        @media (max-width: 520px) {
            .section {
                padding-top: 2.5rem;
                padding-bottom: 2.5rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            .hero {
                padding-top: 2.5rem !important;
                padding-bottom: 2.5rem !important;
            }
            .news-card .news-thumb {
                aspect-ratio: 16 / 10;
            }
            .rank-item {
                padding: 0.75rem 0.5rem;
                gap: 0.75rem;
            }
            .card-body {
                padding: 1rem;
            }
        }
        @media (min-width: 521px) and (max-width: 767px) {
            .section {
                padding-top: 3rem;
                padding-bottom: 3rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--slate-100);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--slate-300);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--slate-400);
        }

        /* ===== Utility ===== */
        .text-balance {
            text-wrap: balance;
        }
        .line-clamp-2 {
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .line-clamp-3 {
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }