/* roulang page: index */
:root {
  --primary: #0F2B4A;
  --primary-light: #1A3F62;
  --primary-dark: #0A1E33;
  --accent: #E87A2E;
  --accent-hover: #D06B20;
  --accent-soft: #FFF0E5;
  --bg-body: #F5F7FA;
  --bg-white: #FFFFFF;
  --bg-card: #FFFFFF;
  --bg-dark: #0F2B4A;
  --text-primary: #1A2A3A;
  --text-secondary: #4A5A6A;
  --text-light: #8A9AA8;
  --text-white: #FFFFFF;
  --border-color: #E8ECF0;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --shadow: 0 8px 32px rgba(15, 43, 74, 0.08);
  --shadow-hover: 0 16px 48px rgba(15, 43, 74, 0.14);
  --shadow-sidebar: 2px 0 24px rgba(0,0,0,0.06);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --sidebar-width: 260px;
  --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font-base); background: var(--bg-body); color: var(--text-primary); line-height: 1.7; font-size: 16px; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font-family: inherit; }
.container { max-width: 1200px; padding: 0 24px; margin: 0 auto; }

/* ===== App Shell ===== */
.app-shell { display: flex; min-height: 100vh; }
.sidebar {
  position: fixed; top: 0; left: 0; width: var(--sidebar-width); height: 100vh;
  background: var(--bg-dark); color: var(--text-white); z-index: 1050;
  display: flex; flex-direction: column; overflow-y: auto;
  box-shadow: var(--shadow-sidebar); transition: transform var(--transition);
}
.sidebar-brand {
  padding: 28px 24px 20px; border-bottom: 1px solid rgba(255,255,255,0.08);
  display: flex; align-items: center; gap: 12px;
}
.sidebar-brand .brand-icon {
  width: 40px; height: 40px; background: var(--accent); border-radius: 12px;
  display: flex; align-items: center; justify-content: center; font-size: 20px;
  color: #fff; flex-shrink: 0;
}
.sidebar-brand .brand-text {
  font-size: 20px; font-weight: 700; letter-spacing: 0.5px; line-height: 1.3;
  color: var(--text-white);
}
.sidebar-nav { padding: 20px 16px; flex: 1; display: flex; flex-direction: column; gap: 4px; }
.sidebar-nav .nav-item {
  display: flex; align-items: center; gap: 14px; padding: 12px 18px;
  border-radius: var(--radius-sm); color: rgba(255,255,255,0.7);
  font-size: 15px; font-weight: 500; transition: var(--transition);
  text-decoration: none;
}
.sidebar-nav .nav-item i { width: 20px; text-align: center; font-size: 16px; }
.sidebar-nav .nav-item:hover { background: rgba(255,255,255,0.08); color: #fff; }
.sidebar-nav .nav-item.active { background: var(--accent); color: #fff; box-shadow: 0 4px 16px rgba(232,122,46,0.3); }
.sidebar-footer {
  padding: 20px 24px; border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 12px; color: rgba(255,255,255,0.4); text-align: center;
}
.main-area { margin-left: var(--sidebar-width); flex: 1; min-width: 0; }

/* ===== Mobile Toggle ===== */
.mobile-toggle {
  display: none; position: fixed; top: 16px; left: 16px; z-index: 1060;
  width: 44px; height: 44px; background: var(--primary); color: #fff;
  border: none; border-radius: 12px; font-size: 20px;
  align-items: center; justify-content: center; cursor: pointer;
  box-shadow: 0 4px 16px rgba(15,43,74,0.2); transition: var(--transition);
}
.mobile-toggle:hover { background: var(--primary-light); transform: scale(1.05); }
.sidebar-overlay {
  display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0,0,0,0.4); z-index: 1045; opacity: 0; transition: opacity var(--transition);
}

/* ===== Hero ===== */
.hero {
  position: relative; padding: 100px 0 90px; min-height: 600px;
  display: flex; align-items: center; overflow: hidden;
  background: var(--primary-dark);
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  opacity: 0.25; transform: scale(1.05);
}
.hero-overlay {
  position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(135deg, rgba(15,43,74,0.92) 0%, rgba(10,30,51,0.80) 50%, rgba(15,43,74,0.70) 100%);
}
.hero-content { position: relative; z-index: 2; max-width: 720px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 18px;
  background: rgba(232,122,46,0.18); color: var(--accent); border-radius: 50px;
  font-size: 14px; font-weight: 600; letter-spacing: 0.5px; margin-bottom: 20px;
  border: 1px solid rgba(232,122,46,0.25);
}
.hero h1 { font-size: 52px; font-weight: 800; line-height: 1.2; color: #fff; margin-bottom: 20px; letter-spacing: -0.5px; }
.hero h1 span { color: var(--accent); }
.hero p { font-size: 18px; color: rgba(255,255,255,0.75); max-width: 580px; margin-bottom: 32px; line-height: 1.8; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; }
.btn-accent {
  display: inline-flex; align-items: center; gap: 10px; padding: 14px 36px;
  background: var(--accent); color: #fff; border: none; border-radius: 50px;
  font-size: 16px; font-weight: 600; cursor: pointer; transition: var(--transition);
  text-decoration: none; box-shadow: 0 6px 24px rgba(232,122,46,0.35);
}
.btn-accent:hover { background: var(--accent-hover); color: #fff; transform: translateY(-2px); box-shadow: 0 10px 32px rgba(232,122,46,0.45); }
.btn-outline-light {
  display: inline-flex; align-items: center; gap: 10px; padding: 14px 36px;
  background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.3);
  border-radius: 50px; font-size: 16px; font-weight: 600; cursor: pointer;
  transition: var(--transition); text-decoration: none;
}
.btn-outline-light:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.6); color: #fff; transform: translateY(-2px); }
.hero-stats { display: flex; flex-wrap: wrap; gap: 32px; margin-top: 48px; padding-top: 36px; border-top: 1px solid rgba(255,255,255,0.1); }
.hero-stat h3 { font-size: 32px; font-weight: 700; color: #fff; margin-bottom: 2px; }
.hero-stat h3 i { color: var(--accent); font-size: 24px; margin-right: 6px; }
.hero-stat p { font-size: 14px; color: rgba(255,255,255,0.55); margin: 0; }

/* ===== Section ===== */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-white); }
.section-dark { background: var(--bg-dark); color: var(--text-white); }
.section-header { text-align: center; max-width: 640px; margin: 0 auto 52px; }
.section-header .tag {
  display: inline-block; padding: 4px 16px; background: var(--accent-soft); color: var(--accent);
  border-radius: 50px; font-size: 13px; font-weight: 600; margin-bottom: 12px;
}
.section-header h2 { font-size: 36px; font-weight: 700; color: var(--text-primary); margin-bottom: 12px; letter-spacing: -0.3px; }
.section-header p { font-size: 16px; color: var(--text-secondary); max-width: 520px; margin: 0 auto; }
.section-dark .section-header h2 { color: #fff; }
.section-dark .section-header p { color: rgba(255,255,255,0.65); }
.section-dark .section-header .tag { background: rgba(232,122,46,0.2); color: var(--accent); }

/* ===== Feature Cards ===== */
.feature-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 28px; }
.feature-card {
  background: var(--bg-card); border-radius: var(--radius); padding: 36px 28px;
  box-shadow: var(--shadow); transition: var(--transition); border: 1px solid var(--border-color);
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: transparent; }
.feature-card .icon {
  width: 56px; height: 56px; background: var(--accent-soft); color: var(--accent);
  border-radius: 14px; display: flex; align-items: center; justify-content: center;
  font-size: 24px; margin-bottom: 20px; transition: var(--transition);
}
.feature-card:hover .icon { background: var(--accent); color: #fff; }
.feature-card h3 { font-size: 20px; font-weight: 600; margin-bottom: 10px; color: var(--text-primary); }
.feature-card p { font-size: 15px; color: var(--text-secondary); line-height: 1.7; margin: 0; }

/* ===== Category Cards ===== */
.category-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 28px; }
.category-card {
  position: relative; border-radius: var(--radius); overflow: hidden;
  background: var(--bg-card); box-shadow: var(--shadow); transition: var(--transition);
  border: 1px solid var(--border-color); display: flex; flex-direction: column;
}
.category-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: transparent; }
.category-card .card-img {
  height: 200px; overflow: hidden; position: relative;
}
.category-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.category-card:hover .card-img img { transform: scale(1.05); }
.category-card .card-img .overlay {
  position: absolute; inset: 0; background: linear-gradient(0deg, rgba(15,43,74,0.5) 0%, transparent 60%);
}
.category-card .card-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.category-card .card-body h3 { font-size: 20px; font-weight: 600; margin-bottom: 8px; color: var(--text-primary); }
.category-card .card-body p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; flex: 1; }
.category-card .card-body .btn-link {
  display: inline-flex; align-items: center; gap: 8px; color: var(--accent);
  font-weight: 600; font-size: 14px; text-decoration: none; transition: var(--transition);
}
.category-card .card-body .btn-link:hover { gap: 14px; color: var(--accent-hover); }

/* ===== Steps ===== */
.steps-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; position: relative; }
.step-card {
  text-align: center; padding: 36px 20px; background: var(--bg-card);
  border-radius: var(--radius); box-shadow: var(--shadow); transition: var(--transition);
  border: 1px solid var(--border-color); position: relative;
}
.step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.step-number {
  width: 48px; height: 48px; background: var(--primary); color: #fff; border-radius: 50%;
  display: flex; align-items: center; justify-content: center; font-size: 20px; font-weight: 700;
  margin: 0 auto 16px; transition: var(--transition);
}
.step-card:hover .step-number { background: var(--accent); transform: scale(1.1); }
.step-card h4 { font-size: 18px; font-weight: 600; margin-bottom: 8px; color: var(--text-primary); }
.step-card p { font-size: 14px; color: var(--text-secondary); margin: 0; line-height: 1.7; }
.step-arrow { position: absolute; top: 50%; right: -18px; transform: translateY(-50%); color: var(--text-light); font-size: 20px; z-index: 2; }

/* ===== News List ===== */
.news-list { display: grid; grid-template-columns: 1fr; gap: 20px; }
.news-item {
  display: flex; gap: 24px; background: var(--bg-card); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow); transition: var(--transition);
  border: 1px solid var(--border-color); align-items: flex-start;
}
.news-item:hover { transform: translateX(4px); box-shadow: var(--shadow-hover); border-color: transparent; }
.news-item .news-thumb {
  width: 120px; height: 90px; border-radius: var(--radius-sm); overflow: hidden; flex-shrink: 0;
}
.news-item .news-thumb img { width: 100%; height: 100%; object-fit: cover; }
.news-item .news-info { flex: 1; min-width: 0; }
.news-item .news-info h3 { font-size: 18px; font-weight: 600; margin-bottom: 6px; color: var(--text-primary); }
.news-item .news-info h3 a { color: inherit; text-decoration: none; }
.news-item .news-info h3 a:hover { color: var(--accent); }
.news-item .news-info p { font-size: 14px; color: var(--text-secondary); margin-bottom: 10px; line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-meta { display: flex; align-items: center; gap: 16px; font-size: 13px; color: var(--text-light); }
.news-meta .tag { display: inline-block; padding: 2px 12px; background: var(--accent-soft); color: var(--accent); border-radius: 50px; font-size: 12px; font-weight: 600; }
.news-empty { text-align: center; padding: 48px 20px; color: var(--text-secondary); background: var(--bg-white); border-radius: var(--radius); border: 1px dashed var(--border-color); }

/* ===== Data Counter ===== */
.data-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; }
.data-card {
  text-align: center; padding: 40px 20px; background: rgba(255,255,255,0.06);
  border-radius: var(--radius); border: 1px solid rgba(255,255,255,0.08);
  transition: var(--transition);
}
.data-card:hover { background: rgba(255,255,255,0.10); transform: translateY(-4px); }
.data-card .num { font-size: 40px; font-weight: 800; color: var(--accent); margin-bottom: 4px; }
.data-card .label { font-size: 15px; color: rgba(255,255,255,0.7); margin: 0; }

/* ===== FAQ ===== */
.faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--bg-card); border-radius: var(--radius-sm); overflow: hidden;
  border: 1px solid var(--border-color); transition: var(--transition);
}
.faq-item:hover { border-color: var(--accent); }
.faq-question {
  display: flex; justify-content: space-between; align-items: center;
  padding: 18px 24px; cursor: pointer; font-weight: 600; font-size: 16px;
  color: var(--text-primary); transition: var(--transition); user-select: none;
}
.faq-question i { color: var(--accent); font-size: 14px; transition: transform var(--transition); }
.faq-item.active .faq-question i { transform: rotate(180deg); }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 24px; color: var(--text-secondary); font-size: 15px; line-height: 1.8;
}
.faq-item.active .faq-answer { max-height: 300px; padding: 0 24px 20px; }

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: var(--radius-lg); padding: 64px 48px; text-align: center;
  position: relative; overflow: hidden;
}
.cta-section::before {
  content: ''; position: absolute; inset: 0;
  background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  opacity: 0.08; z-index: 0;
}
.cta-section > * { position: relative; z-index: 1; }
.cta-section h2 { font-size: 36px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.cta-section p { font-size: 17px; color: rgba(255,255,255,0.75); max-width: 560px; margin: 0 auto 28px; }
.cta-section .btn-accent { font-size: 18px; padding: 16px 44px; }

/* ===== Footer ===== */
.footer {
  background: var(--primary-dark); color: rgba(255,255,255,0.7); padding: 48px 0 32px;
  margin-top: 0;
}
.footer-top { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 32px; }
.footer-brand .brand-text { font-size: 20px; font-weight: 700; color: #fff; margin-bottom: 10px; display: block; }
.footer-brand p { font-size: 14px; line-height: 1.8; max-width: 300px; color: rgba(255,255,255,0.55); }
.footer-col h5 { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 16px; }
.footer-col ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.footer-col ul li a { color: rgba(255,255,255,0.55); font-size: 14px; text-decoration: none; transition: var(--transition); }
.footer-col ul li a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06); padding-top: 20px; margin-top: 8px;
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px;
  font-size: 13px; color: rgba(255,255,255,0.4);
}
.footer-bottom a { color: rgba(255,255,255,0.5); text-decoration: none; }
.footer-bottom a:hover { color: var(--accent); }

/* ===== Mobile Responsive ===== */
@media (max-width: 1024px) {
  .feature-grid { grid-template-columns: repeat(2,1fr); }
  .steps-grid { grid-template-columns: repeat(2,1fr); }
  .data-grid { grid-template-columns: repeat(2,1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 40px; }
}
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .mobile-toggle { display: flex; }
  .sidebar-overlay.active { display: block; opacity: 1; }
  .main-area { margin-left: 0; }
  .hero { padding: 80px 0 60px; min-height: auto; }
  .hero h1 { font-size: 32px; }
  .hero p { font-size: 16px; }
  .hero-stats { gap: 20px; }
  .hero-stat h3 { font-size: 24px; }
  .section { padding: 50px 0; }
  .section-header h2 { font-size: 28px; }
  .feature-grid { grid-template-columns: 1fr; }
  .category-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .step-arrow { display: none; }
  .data-grid { grid-template-columns: repeat(2,1fr); }
  .news-item { flex-direction: column; }
  .news-item .news-thumb { width: 100%; height: 180px; }
  .cta-section { padding: 40px 24px; }
  .cta-section h2 { font-size: 28px; }
  .footer-top { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 520px) {
  .hero h1 { font-size: 26px; }
  .hero-actions { flex-direction: column; }
  .btn-accent, .btn-outline-light { width: 100%; justify-content: center; }
  .hero-stats { flex-direction: column; gap: 16px; }
  .data-grid { grid-template-columns: 1fr; }
  .feature-card { padding: 28px 20px; }
  .category-card .card-img { height: 160px; }
}

/* roulang page: category1 */
/* ===== :root 设计变量 ===== */
        :root {
            --primary: #1a3a6b;
            --primary-light: #2a5a9e;
            --primary-dark: #0f2444;
            --secondary: #e8a838;
            --secondary-light: #f0c060;
            --secondary-dark: #c88a1e;
            --accent: #3a7bd5;
            --success: #28a745;
            --info: #17a2b8;
            --warning: #ffc107;
            --danger: #dc3545;
            --bg-body: #f5f7fb;
            --bg-white: #ffffff;
            --bg-light: #eef1f7;
            --bg-dark: #0f2444;
            --text-primary: #1a2a4a;
            --text-secondary: #4a5a7a;
            --text-muted: #8a9ab0;
            --text-white: #ffffff;
            --border-color: #e0e5ee;
            --border-radius: 12px;
            --border-radius-sm: 8px;
            --border-radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(26, 58, 107, 0.06);
            --shadow-md: 0 6px 24px rgba(26, 58, 107, 0.10);
            --shadow-lg: 0 16px 48px rgba(26, 58, 107, 0.14);
            --shadow-xl: 0 24px 64px rgba(26, 58, 107, 0.18);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --sidebar-width: 240px;
            --header-height: 0px;
            --spacing-section: 5rem;
            --spacing-block: 3rem;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 1rem;
            padding-left: var(--sidebar-width);
            min-height: 100vh;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary);
            text-decoration: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            transition: var(--transition);
        }
        ul,
        ol {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
            margin-bottom: 0.75rem;
        }
        p {
            margin-bottom: 1rem;
            color: var(--text-secondary);
        }

        /* ===== 容器 ===== */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* ===== 侧边栏导航 (App Shell 风格) ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-white);
            border-right: 1px solid var(--border-color);
            box-shadow: 2px 0 20px rgba(26, 58, 107, 0.04);
            display: flex;
            flex-direction: column;
            z-index: 1050;
            transition: transform 0.3s ease;
        }
        .sidebar-brand {
            padding: 1.75rem 1.5rem 1.25rem;
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .sidebar-brand .brand-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: var(--border-radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.2rem;
            flex-shrink: 0;
        }
        .sidebar-brand .brand-text {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary-dark);
            letter-spacing: 0.01em;
            line-height: 1.3;
        }
        .sidebar-nav {
            flex: 1;
            padding: 1.25rem 1rem;
            display: flex;
            flex-direction: column;
            gap: 0.35rem;
            overflow-y: auto;
        }
        .sidebar-nav .nav-item {
            display: flex;
            align-items: center;
            gap: 0.85rem;
            padding: 0.7rem 1rem;
            border-radius: var(--border-radius-sm);
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            text-decoration: none;
        }
        .sidebar-nav .nav-item i {
            width: 1.25rem;
            text-align: center;
            font-size: 1.05rem;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .sidebar-nav .nav-item:hover {
            background: var(--bg-light);
            color: var(--primary);
            transform: translateX(2px);
        }
        .sidebar-nav .nav-item:hover i {
            color: var(--primary-light);
        }
        .sidebar-nav .nav-item.active {
            background: linear-gradient(135deg, rgba(26, 58, 107, 0.08), rgba(42, 90, 158, 0.06));
            color: var(--primary);
            font-weight: 600;
            box-shadow: inset 3px 0 0 var(--primary);
        }
        .sidebar-nav .nav-item.active i {
            color: var(--primary);
        }
        .sidebar-footer {
            padding: 1rem 1.5rem 1.5rem;
            border-top: 1px solid var(--border-color);
            font-size: 0.8rem;
            color: var(--text-muted);
            text-align: center;
        }
        .sidebar-footer small {
            display: block;
            line-height: 1.5;
        }

        /* ===== 移动端导航折叠按钮 ===== */
        .navbar-toggler-side {
            display: none;
            position: fixed;
            top: 0.75rem;
            left: 0.75rem;
            z-index: 1060;
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius-sm);
            padding: 0.5rem 0.7rem;
            font-size: 1.2rem;
            color: var(--primary);
            cursor: pointer;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .navbar-toggler-side:hover {
            background: var(--bg-light);
            box-shadow: var(--shadow-md);
        }
        .mobile-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(15, 36, 68, 0.4);
            backdrop-filter: blur(4px);
            z-index: 1045;
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .mobile-overlay.show {
            opacity: 1;
        }

        /* ===== 主内容区 ===== */
        .main-content {
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* ===== 页面 Banner ===== */
        .page-banner {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            padding: 4rem 0 3.5rem;
            position: relative;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .page-banner .banner-content {
            position: relative;
            z-index: 2;
        }
        .page-banner .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 1.25rem;
        }
        .page-banner .breadcrumb-custom a {
            color: rgba(255, 255, 255, 0.8);
            transition: var(--transition);
        }
        .page-banner .breadcrumb-custom a:hover {
            color: var(--secondary-light);
        }
        .page-banner .breadcrumb-custom .sep {
            color: rgba(255, 255, 255, 0.4);
        }
        .page-banner h1 {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 0.75rem;
            letter-spacing: -0.02em;
        }
        .page-banner p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 680px;
            margin-bottom: 0;
            line-height: 1.7;
        }
        .page-banner .banner-badge {
            display: inline-block;
            background: rgba(232, 168, 56, 0.2);
            color: var(--secondary-light);
            padding: 0.3rem 1rem;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            border: 1px solid rgba(232, 168, 56, 0.25);
            margin-bottom: 1rem;
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: var(--spacing-section) 0;
        }
        .section-alt {
            background: var(--bg-white);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-light {
            background: var(--bg-light);
        }
        .section .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            letter-spacing: -0.01em;
        }
        .section .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 600px;
            margin-bottom: 2.5rem;
        }
        .section-dark .section-title {
            color: var(--text-white);
        }
        .section-dark .section-subtitle {
            color: rgba(255, 255, 255, 0.7);
        }
        .section-dark .text-secondary {
            color: rgba(255, 255, 255, 0.75) !important;
        }

        /* ===== 卡片通用 ===== */
        .card-custom {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            overflow: hidden;
            height: 100%;
        }
        .card-custom:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: transparent;
        }
        .card-custom .card-body {
            padding: 1.75rem;
        }
        .card-custom .card-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--border-radius-sm);
            background: linear-gradient(135deg, rgba(26, 58, 107, 0.08), rgba(42, 90, 158, 0.06));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--primary);
            margin-bottom: 1rem;
            transition: var(--transition);
        }
        .card-custom:hover .card-icon {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            transform: scale(1.05);
        }
        .card-custom .card-title {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
        .card-custom .card-text {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }
        .card-custom .card-tag {
            display: inline-block;
            background: var(--bg-light);
            color: var(--text-secondary);
            padding: 0.2rem 0.8rem;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 500;
            margin-top: 0.75rem;
        }

        /* ===== 按钮 ===== */
        .btn {
            padding: 0.65rem 1.8rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            cursor: pointer;
            text-decoration: none;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            box-shadow: 0 4px 16px rgba(26, 58, 107, 0.25);
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            color: #fff;
            box-shadow: 0 8px 28px rgba(26, 58, 107, 0.35);
            transform: translateY(-2px);
        }
        .btn-secondary {
            background: linear-gradient(135deg, var(--secondary), var(--secondary-light));
            color: var(--primary-dark);
            box-shadow: 0 4px 16px rgba(232, 168, 56, 0.3);
        }
        .btn-secondary:hover {
            background: linear-gradient(135deg, var(--secondary-dark), var(--secondary));
            color: #fff;
            box-shadow: 0 8px 28px rgba(232, 168, 56, 0.4);
            transform: translateY(-2px);
        }
        .btn-outline-light {
            background: transparent;
            border: 2px solid rgba(255, 255, 255, 0.5);
            color: var(--text-white);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-lg {
            padding: 0.85rem 2.5rem;
            font-size: 1.05rem;
        }
        .btn-sm {
            padding: 0.4rem 1.2rem;
            font-size: 0.85rem;
        }

        /* ===== 徽章/标签 ===== */
        .badge-custom {
            display: inline-block;
            padding: 0.25rem 0.9rem;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--bg-light);
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .badge-primary {
            background: rgba(26, 58, 107, 0.1);
            color: var(--primary);
        }
        .badge-secondary {
            background: rgba(232, 168, 56, 0.15);
            color: var(--secondary-dark);
        }
        .badge-success {
            background: rgba(40, 167, 69, 0.12);
            color: #1e7e34;
        }

        /* ===== 步骤/流程 ===== */
        .step-item {
            display: flex;
            gap: 1.25rem;
            padding: 1.5rem 0;
            border-bottom: 1px dashed var(--border-color);
            position: relative;
        }
        .step-item:last-child {
            border-bottom: none;
        }
        .step-number {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            box-shadow: 0 4px 12px rgba(26, 58, 107, 0.2);
        }
        .step-content h5 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 0.3rem;
        }
        .step-content p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            padding: 1.25rem 1.75rem;
            margin-bottom: 0.75rem;
            transition: var(--transition);
            cursor: pointer;
        }
        .faq-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            gap: 1rem;
        }
        .faq-question i {
            color: var(--primary-light);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding-top 0.35s ease;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding-top: 1rem;
        }

        /* ===== CTA 区块 ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            border-radius: var(--border-radius-lg);
            padding: 3.5rem 3rem;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-block .cta-content {
            position: relative;
            z-index: 2;
        }
        .cta-block h3 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 0.5rem;
        }
        .cta-block p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.05rem;
            max-width: 580px;
            margin: 0 auto 1.5rem;
        }

        /* ===== 数据统计 ===== */
        .stat-item {
            text-align: center;
            padding: 1.5rem 1rem;
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 0.25rem;
        }
        .stat-label {
            font-size: 0.95rem;
            color: var(--text-muted);
            font-weight: 500;
        }
        .section-dark .stat-number {
            color: var(--secondary-light);
        }
        .section-dark .stat-label {
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== 图文混排 ===== */
        .media-block {
            display: flex;
            align-items: center;
            gap: 3rem;
        }
        .media-block .media-image {
            flex: 0 0 48%;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .media-block .media-image img {
            width: 100%;
            height: auto;
            display: block;
            transition: var(--transition);
        }
        .media-block .media-image:hover img {
            transform: scale(1.02);
        }
        .media-block .media-body {
            flex: 1;
        }
        .media-block .media-body h3 {
            font-size: 1.6rem;
            margin-bottom: 0.75rem;
        }
        .media-block .media-body p {
            font-size: 1rem;
            color: var(--text-secondary);
            margin-bottom: 1rem;
        }
        .media-block .media-body .feature-list {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
            margin-top: 1rem;
        }
        .media-block .media-body .feature-list li {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 0.95rem;
            color: var(--text-secondary);
        }
        .media-block .media-body .feature-list li i {
            color: var(--success);
            font-size: 0.9rem;
        }

        /* ===== 入口分类网格 ===== */
        .entry-grid .entry-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            padding: 1.75rem 1.5rem;
            text-align: center;
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }
        .entry-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: transparent;
        }
        .entry-card .entry-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(26, 58, 107, 0.08), rgba(42, 90, 158, 0.06));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--primary);
            margin-bottom: 1rem;
            transition: var(--transition);
        }
        .entry-card:hover .entry-icon {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            transform: scale(1.1);
        }
        .entry-card h5 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 0.35rem;
        }
        .entry-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* ===== 内容列表 ===== */
        .content-list-item {
            display: flex;
            gap: 1.25rem;
            padding: 1.25rem 0;
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
            align-items: flex-start;
        }
        .content-list-item:last-child {
            border-bottom: none;
        }
        .content-list-item .list-thumb {
            flex: 0 0 120px;
            height: 80px;
            border-radius: var(--border-radius-sm);
            overflow: hidden;
            background: var(--bg-light);
        }
        .content-list-item .list-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .content-list-item .list-body {
            flex: 1;
        }
        .content-list-item .list-body h6 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 0.25rem;
        }
        .content-list-item .list-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0.3rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .content-list-item .list-body .meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            display: flex;
            gap: 1rem;
        }
        .content-list-item:hover {
            padding-left: 0.5rem;
        }
        .content-list-item:hover .list-body h6 {
            color: var(--primary-light);
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 3.5rem 0 0;
            margin-top: auto;
        }
        .footer .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 2.5rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer .footer-brand .brand-text {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            display: block;
            margin-bottom: 0.75rem;
        }
        .footer .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .footer .footer-col h5 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 1rem;
        }
        .footer .footer-col ul li {
            margin-bottom: 0.5rem;
        }
        .footer .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer .footer-col ul li a:hover {
            color: var(--secondary-light);
            padding-left: 4px;
        }
        .footer .footer-col ul li a i {
            margin-right: 0.4rem;
            width: 1rem;
        }
        .footer .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.5rem 0;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
        }
        .footer .footer-bottom a:hover {
            color: var(--secondary-light);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .media-block {
                flex-direction: column;
                gap: 2rem;
            }
            .media-block .media-image {
                flex: 0 0 100%;
                width: 100%;
            }
            .footer .footer-top {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
        }

        @media (max-width: 768px) {
            body {
                padding-left: 0;
            }
            .sidebar {
                transform: translateX(-100%);
                width: 280px;
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .navbar-toggler-side {
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .mobile-overlay.show {
                display: block;
            }
            .page-banner {
                padding: 3rem 0 2.5rem;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .page-banner p {
                font-size: 1rem;
            }
            .section {
                --spacing-section: 3rem;
                padding: var(--spacing-section) 0;
            }
            .section .section-title {
                font-size: 1.5rem;
            }
            .footer .footer-top {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .footer .footer-bottom {
                flex-direction: column;
                gap: 0.5rem;
                text-align: center;
            }
            .cta-block {
                padding: 2.5rem 1.5rem;
            }
            .cta-block h3 {
                font-size: 1.4rem;
            }
            .stat-number {
                font-size: 2rem;
            }
            .content-list-item {
                flex-direction: column;
            }
            .content-list-item .list-thumb {
                flex: 0 0 auto;
                width: 100%;
                height: 140px;
            }
            .entry-grid .entry-card {
                padding: 1.25rem 1rem;
            }
            .step-item {
                padding: 1.25rem 0;
            }
            .step-number {
                width: 40px;
                height: 40px;
                font-size: 0.95rem;
            }
        }

        @media (max-width: 520px) {
            .page-banner h1 {
                font-size: 1.5rem;
            }
            .page-banner .banner-badge {
                font-size: 0.75rem;
                padding: 0.2rem 0.8rem;
            }
            .btn-lg {
                padding: 0.65rem 1.6rem;
                font-size: 0.9rem;
            }
            .card-custom .card-body {
                padding: 1.25rem;
            }
            .stat-item {
                padding: 1rem 0.5rem;
            }
            .stat-number {
                font-size: 1.6rem;
            }
            .faq-item {
                padding: 1rem 1.25rem;
            }
            .media-block .media-body h3 {
                font-size: 1.25rem;
            }
        }

        /* ===== Bootstrap 5 补充覆盖 ===== */
        .row.g-4 {
            --bs-gutter-y: 1.5rem;
        }
        .container {
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }
        @media (min-width: 1400px) {
            .container {
                max-width: 1200px;
            }
        }

        /* ===== 动画 ===== */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-fade-up {
            animation: fadeUp 0.6s ease forwards;
        }
        .delay-1 {
            animation-delay: 0.1s;
        }
        .delay-2 {
            animation-delay: 0.2s;
        }
        .delay-3 {
            animation-delay: 0.3s;
        }
        .delay-4 {
            animation-delay: 0.4s;
        }

/* roulang page: article */
/* ===== Design Variables ===== */
    :root {
        --primary: #c0392b;
        --primary-dark: #a93226;
        --primary-light: #e74c3c;
        --secondary: #2c3e50;
        --secondary-light: #34495e;
        --accent: #f39c12;
        --accent-light: #f1c40f;
        --bg-body: #f8f6f3;
        --bg-white: #ffffff;
        --bg-light: #f0ede8;
        --bg-dark: #1a1a2e;
        --text-dark: #1e1e2a;
        --text-body: #3d3d4a;
        --text-muted: #7a7a8a;
        --text-light: #b0b0c0;
        --border-color: #e5e0d8;
        --border-radius: 12px;
        --border-radius-sm: 8px;
        --border-radius-lg: 20px;
        --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
        --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
        --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
        --shadow-xl: 0 24px 64px rgba(0,0,0,0.16);
        --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
        --sidebar-width: 240px;
        --header-height: 64px;
    }

    /* ===== Reset & Base ===== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; font-size: 16px; }
    body {
        font-family: var(--font-sans);
        background: var(--bg-body);
        color: var(--text-body);
        line-height: 1.7;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        overflow-x: hidden;
    }
    a { color: var(--primary); text-decoration: none; transition: var(--transition); }
    a:hover { color: var(--primary-dark); text-decoration: none; }
    a:focus-visible { outline: 3px solid var(--primary-light); outline-offset: 2px; border-radius: 4px; }
    img { max-width: 100%; height: auto; display: block; border-radius: var(--border-radius); }
    ul, ol { padding-left: 0; list-style: none; }
    h1, h2, h3, h4, h5, h6 { color: var(--text-dark); font-weight: 700; line-height: 1.25; }
    h1 { font-size: 2.25rem; letter-spacing: -0.02em; }
    h2 { font-size: 1.75rem; letter-spacing: -0.01em; }
    h3 { font-size: 1.35rem; }
    h4 { font-size: 1.1rem; }
    p { margin-bottom: 1rem; }
    .container { max-width: 1200px; padding: 0 20px; margin: 0 auto; }

    /* ===== App Shell ===== */
    .app-shell { display: flex; min-height: 100vh; }

    /* ===== Sidebar ===== */
    .sidebar {
        width: var(--sidebar-width);
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        background: var(--bg-white);
        border-right: 1px solid var(--border-color);
        z-index: 1040;
        display: flex;
        flex-direction: column;
        padding: 0;
        box-shadow: 2px 0 12px rgba(0,0,0,0.04);
        transition: transform 0.35s ease;
    }
    .sidebar-brand {
        padding: 24px 20px 16px;
        border-bottom: 1px solid var(--border-color);
        display: flex;
        align-items: center;
        gap: 12px;
    }
    .sidebar-brand .brand-icon {
        width: 40px;
        height: 40px;
        background: linear-gradient(135deg, var(--primary), var(--primary-dark));
        border-radius: 10px;
        display: flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-size: 1.2rem;
        font-weight: 800;
        flex-shrink: 0;
    }
    .sidebar-brand .brand-text {
        font-size: 1.05rem;
        font-weight: 700;
        color: var(--text-dark);
        letter-spacing: -0.01em;
        line-height: 1.2;
    }
    .sidebar-nav {
        padding: 12px 12px 20px;
        flex: 1;
        overflow-y: auto;
        display: flex;
        flex-direction: column;
        gap: 4px;
    }
    .sidebar-nav .nav-item {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 12px 16px;
        border-radius: var(--border-radius-sm);
        color: var(--text-body);
        font-weight: 500;
        font-size: 0.95rem;
        transition: var(--transition);
        position: relative;
    }
    .sidebar-nav .nav-item i { width: 20px; text-align: center; font-size: 1rem; color: var(--text-muted); transition: var(--transition); }
    .sidebar-nav .nav-item:hover { background: var(--bg-light); color: var(--primary); }
    .sidebar-nav .nav-item:hover i { color: var(--primary); }
    .sidebar-nav .nav-item.active {
        background: linear-gradient(135deg, rgba(192,57,43,0.08), rgba(192,57,43,0.03));
        color: var(--primary);
        font-weight: 600;
    }
    .sidebar-nav .nav-item.active i { color: var(--primary); }
    .sidebar-nav .nav-item.active::before {
        content: '';
        position: absolute;
        left: 0;
        top: 6px;
        bottom: 6px;
        width: 3px;
        background: var(--primary);
        border-radius: 0 4px 4px 0;
    }
    .sidebar-close {
        display: none;
        position: absolute;
        top: 12px;
        right: 12px;
        background: none;
        border: none;
        font-size: 1.4rem;
        color: var(--text-muted);
        cursor: pointer;
        padding: 4px 8px;
        border-radius: 6px;
    }
    .sidebar-close:hover { background: var(--bg-light); color: var(--text-dark); }

    /* ===== Main Content ===== */
    .main-content {
        margin-left: var(--sidebar-width);
        flex: 1;
        min-width: 0;
        display: flex;
        flex-direction: column;
    }

    /* ===== Mobile Top Bar ===== */
    .mobile-topbar {
        display: none;
        position: sticky;
        top: 0;
        z-index: 1030;
        background: var(--bg-white);
        border-bottom: 1px solid var(--border-color);
        padding: 12px 20px;
        align-items: center;
        justify-content: space-between;
        box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    }
    .mobile-topbar .brand-text {
        font-size: 1rem;
        font-weight: 700;
        color: var(--text-dark);
    }
    .mobile-topbar .menu-toggle {
        background: none;
        border: none;
        font-size: 1.4rem;
        color: var(--text-body);
        cursor: pointer;
        padding: 4px 8px;
        border-radius: 6px;
        transition: var(--transition);
    }
    .mobile-topbar .menu-toggle:hover { background: var(--bg-light); }

    /* ===== Article Hero ===== */
    .article-hero {
        position: relative;
        padding: 60px 0 50px;
        background: linear-gradient(135deg, var(--secondary), #1a1a2e);
        overflow: hidden;
    }
    .article-hero::before {
        content: '';
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
        opacity: 0.15;
        pointer-events: none;
    }
    .article-hero::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(26,26,46,0.88), rgba(44,62,80,0.78));
        pointer-events: none;
    }
    .article-hero .container { position: relative; z-index: 2; }
    .article-hero .breadcrumb-wrap { margin-bottom: 20px; }
    .article-hero .breadcrumb-wrap a {
        color: rgba(255,255,255,0.6);
        font-size: 0.9rem;
        transition: var(--transition);
    }
    .article-hero .breadcrumb-wrap a:hover { color: #fff; }
    .article-hero .breadcrumb-wrap span { color: rgba(255,255,255,0.4); font-size: 0.9rem; margin: 0 6px; }
    .article-hero .breadcrumb-wrap .current { color: rgba(255,255,255,0.85); }
    .article-hero .hero-category {
        display: inline-block;
        background: var(--primary);
        color: #fff;
        padding: 4px 16px;
        border-radius: 20px;
        font-size: 0.8rem;
        font-weight: 600;
        letter-spacing: 0.3px;
        text-transform: uppercase;
        margin-bottom: 16px;
    }
    .article-hero h1 {
        color: #fff;
        font-size: 2rem;
        max-width: 800px;
        line-height: 1.3;
        margin-bottom: 16px;
        font-weight: 700;
    }
    .article-hero .hero-meta {
        display: flex;
        flex-wrap: wrap;
        gap: 20px;
        color: rgba(255,255,255,0.65);
        font-size: 0.9rem;
    }
    .article-hero .hero-meta i { margin-right: 6px; }

    /* ===== Article Content ===== */
    .article-section { padding: 50px 0; background: var(--bg-white); }
    .article-content-wrap {
        max-width: 820px;
        margin: 0 auto;
    }
    .article-body {
        font-size: 1.05rem;
        line-height: 1.9;
        color: var(--text-body);
    }
    .article-body p { margin-bottom: 1.2rem; }
    .article-body h2, .article-body h3, .article-body h4 { margin-top: 2rem; margin-bottom: 0.8rem; color: var(--text-dark); }
    .article-body ul, .article-body ol { padding-left: 1.5rem; margin-bottom: 1.2rem; list-style: disc; }
    .article-body ol { list-style: decimal; }
    .article-body li { margin-bottom: 0.4rem; }
    .article-body img { border-radius: var(--border-radius); margin: 1.5rem 0; box-shadow: var(--shadow-md); }
    .article-body blockquote {
        border-left: 4px solid var(--primary);
        background: var(--bg-light);
        padding: 16px 24px;
        margin: 1.5rem 0;
        border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
        font-style: italic;
        color: var(--text-muted);
    }
    .article-body a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
    .article-body a:hover { color: var(--primary-dark); }

    /* ===== Article Info Bar ===== */
    .article-info-bar {
        padding: 24px 0 16px;
        border-top: 1px solid var(--border-color);
        margin-top: 32px;
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        align-items: center;
        gap: 16px;
    }
    .article-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
    }
    .article-tags .tag {
        display: inline-block;
        background: var(--bg-light);
        color: var(--text-muted);
        padding: 4px 14px;
        border-radius: 20px;
        font-size: 0.8rem;
        font-weight: 500;
        transition: var(--transition);
    }
    .article-tags .tag:hover { background: var(--primary); color: #fff; }
    .article-share {
        display: flex;
        gap: 10px;
        align-items: center;
    }
    .article-share span { font-size: 0.85rem; color: var(--text-muted); }
    .article-share .share-btn {
        width: 36px;
        height: 36px;
        border-radius: 50%;
        border: 1px solid var(--border-color);
        background: var(--bg-white);
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--text-muted);
        transition: var(--transition);
        cursor: pointer;
        font-size: 0.9rem;
    }
    .article-share .share-btn:hover { border-color: var(--primary); color: var(--primary); background: rgba(192,57,43,0.05); }

    /* ===== Prev / Next ===== */
    .article-prevnext {
        padding: 30px 0;
        border-top: 1px solid var(--border-color);
        margin-top: 10px;
    }
    .article-prevnext .row { gap: 0; }
    .article-prevnext .pn-item {
        display: block;
        padding: 16px 20px;
        border-radius: var(--border-radius-sm);
        background: var(--bg-light);
        transition: var(--transition);
        position: relative;
    }
    .article-prevnext .pn-item:hover { background: var(--bg-body); box-shadow: var(--shadow-sm); }
    .article-prevnext .pn-label { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 4px; }
    .article-prevnext .pn-title { font-size: 0.95rem; font-weight: 600; color: var(--text-dark); display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
    .article-prevnext .pn-item:hover .pn-title { color: var(--primary); }
    .article-prevnext .pn-item.disabled { opacity: 0.4; pointer-events: none; }

    /* ===== Related Articles ===== */
    .related-section {
        padding: 50px 0;
        background: var(--bg-body);
    }
    .related-section .section-title {
        text-align: center;
        margin-bottom: 36px;
    }
    .related-section .section-title h2 { font-size: 1.6rem; position: relative; display: inline-block; }
    .related-section .section-title h2::after {
        content: '';
        display: block;
        width: 50px;
        height: 3px;
        background: var(--primary);
        border-radius: 4px;
        margin: 10px auto 0;
    }
    .related-card {
        background: var(--bg-white);
        border-radius: var(--border-radius);
        overflow: hidden;
        box-shadow: var(--shadow-sm);
        transition: var(--transition);
        height: 100%;
        border: 1px solid var(--border-color);
    }
    .related-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
    .related-card .card-img {
        aspect-ratio: 16/9;
        overflow: hidden;
        background: var(--bg-light);
    }
    .related-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
    .related-card:hover .card-img img { transform: scale(1.05); }
    .related-card .card-body { padding: 20px; }
    .related-card .card-body .card-cat {
        display: inline-block;
        background: rgba(192,57,43,0.08);
        color: var(--primary);
        padding: 2px 12px;
        border-radius: 12px;
        font-size: 0.75rem;
        font-weight: 600;
        margin-bottom: 8px;
    }
    .related-card .card-body h5 { font-size: 1rem; font-weight: 600; margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
    .related-card .card-body p { font-size: 0.88rem; color: var(--text-muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
    .related-card .card-body .card-meta { font-size: 0.8rem; color: var(--text-light); display: flex; justify-content: space-between; margin-top: 12px; }

    /* ===== CTA Section ===== */
    .cta-section {
        padding: 50px 0;
        background: linear-gradient(135deg, var(--primary), var(--primary-dark));
        color: #fff;
        text-align: center;
    }
    .cta-section h2 { color: #fff; font-size: 1.7rem; margin-bottom: 12px; }
    .cta-section p { color: rgba(255,255,255,0.85); font-size: 1.05rem; max-width: 600px; margin: 0 auto 28px; }
    .cta-section .btn-cta {
        display: inline-block;
        background: #fff;
        color: var(--primary);
        padding: 14px 40px;
        border-radius: 50px;
        font-weight: 700;
        font-size: 1.05rem;
        border: none;
        transition: var(--transition);
        box-shadow: 0 8px 24px rgba(0,0,0,0.15);
    }
    .cta-section .btn-cta:hover { background: var(--accent); color: #fff; transform: translateY(-2px); box-shadow: 0 12px 32px rgba(0,0,0,0.2); }

    /* ===== Footer ===== */
    .footer {
        background: var(--secondary);
        color: rgba(255,255,255,0.7);
        padding: 50px 0 30px;
        margin-top: auto;
    }
    .footer .footer-top { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 30px; margin-bottom: 30px; }
    .footer .footer-brand .brand-text { font-size: 1.2rem; font-weight: 700; color: #fff; display: block; margin-bottom: 12px; }
    .footer .footer-brand p { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.6); max-width: 300px; }
    .footer .footer-col h5 { color: #fff; font-size: 0.95rem; font-weight: 600; margin-bottom: 16px; position: relative; padding-bottom: 8px; }
    .footer .footer-col h5::after { content: ''; position: absolute; bottom: 0; left: 0; width: 28px; height: 2px; background: var(--primary); border-radius: 2px; }
    .footer .footer-col ul { display: flex; flex-direction: column; gap: 10px; }
    .footer .footer-col ul li a { color: rgba(255,255,255,0.6); font-size: 0.88rem; transition: var(--transition); display: inline-flex; align-items: center; gap: 6px; }
    .footer .footer-col ul li a:hover { color: #fff; padding-left: 4px; }
    .footer .footer-col ul li a i { font-size: 0.8rem; width: 16px; }
    .footer .footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding-top: 20px; display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 12px; font-size: 0.85rem; color: rgba(255,255,255,0.4); }
    .footer .footer-bottom a { color: rgba(255,255,255,0.5); }
    .footer .footer-bottom a:hover { color: #fff; }

    /* ===== Not Found ===== */
    .not-found-box { text-align: center; padding: 60px 20px; }
    .not-found-box .nf-icon { font-size: 3.5rem; color: var(--text-light); margin-bottom: 20px; }
    .not-found-box h3 { font-size: 1.5rem; margin-bottom: 12px; }
    .not-found-box p { color: var(--text-muted); margin-bottom: 24px; }
    .not-found-box .btn-back { display: inline-block; background: var(--primary); color: #fff; padding: 10px 28px; border-radius: 50px; font-weight: 600; transition: var(--transition); }
    .not-found-box .btn-back:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-md); }

    /* ===== Responsive ===== */
    @media (max-width: 1199.98px) {
        .footer .footer-top { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 991.98px) {
        .sidebar { transform: translateX(-100%); }
        .sidebar.open { transform: translateX(0); }
        .mobile-topbar { display: flex; }
        .main-content { margin-left: 0; }
        .sidebar-close { display: block; }
        .article-hero h1 { font-size: 1.6rem; }
        .article-hero { padding: 40px 0 36px; }
        .footer .footer-top { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 767.98px) {
        .article-hero h1 { font-size: 1.35rem; }
        .article-hero .hero-meta { gap: 12px; font-size: 0.8rem; flex-wrap: wrap; }
        .article-body { font-size: 0.98rem; }
        .article-info-bar { flex-direction: column; align-items: flex-start; }
        .related-section .row > div { margin-bottom: 16px; }
        .cta-section h2 { font-size: 1.35rem; }
        .cta-section .btn-cta { padding: 12px 28px; font-size: 0.95rem; }
        .footer .footer-top { grid-template-columns: 1fr; gap: 24px; }
        .footer .footer-bottom { flex-direction: column; text-align: center; }
        .footer { padding: 36px 0 24px; }
    }
    @media (max-width: 520px) {
        .sidebar { width: 100%; }
        .article-hero { padding: 30px 0 28px; }
        .article-hero h1 { font-size: 1.2rem; }
        .article-section { padding: 30px 0; }
        .related-section { padding: 30px 0; }
        .cta-section { padding: 36px 0; }
        .container { padding: 0 16px; }
        .article-prevnext .pn-item { padding: 12px 16px; }
    }

    /* ===== Overlay for mobile ===== */
    .sidebar-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0,0,0,0.4);
        z-index: 1035;
        backdrop-filter: blur(4px);
    }
    .sidebar-overlay.active { display: block; }
    @media (max-width: 991.98px) {
        .sidebar-overlay.active { display: block; }
    }

    /* ===== Misc ===== */
    .text-primary-custom { color: var(--primary) !important; }
    .bg-primary-custom { background: var(--primary) !important; }
    .btn-primary-custom {
        background: var(--primary);
        border-color: var(--primary);
        color: #fff;
        border-radius: 50px;
        padding: 10px 28px;
        font-weight: 600;
        transition: var(--transition);
    }
    .btn-primary-custom:hover { background: var(--primary-dark); border-color: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-md); }