/* roulang page: index */
:root {
    --primary: #16232e;
    --primary-dark: #0a1119;
    --accent: #d4a843;
    --accent-hover: #b8912e;
    --bg-light: #f7f8fc;
    --bg-white: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --radius-sm: 8px;
    --radius: 12px;
    --radius-lg: 20px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.06), 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.06), 0 2px 4px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
    --transition: all 0.25s ease-in-out;
  }

  *,
  *::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", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-main);
    background: var(--bg-light);
    -webkit-font-smoothing: antialiased;
  }

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

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

  button {
    border: none;
    cursor: pointer;
    background: none;
    font: inherit;
    color: inherit;
  }

  input,
  textarea {
    font: inherit;
    border: none;
    outline: none;
  }

  ul,
  ol {
    list-style: none;
  }

  h1,
  h2,
  h3,
  h4,
  h5,
  h6 {
    font-weight: 700;
    line-height: 1.25;
    color: var(--primary-dark);
  }

  .container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
  }

  .section {
    padding: 96px 0;
  }

  .section-sm {
    padding: 64px 0;
  }

  .section-head {
    max-width: 720px;
    margin: 0 auto 56px;
    text-align: center;
  }

  .section-head .eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(212, 168, 67, 0.12);
    color: #a87e2c;
    font-size: 14px;
    font-weight: 600;
    padding: 6px 16px;
    border-radius: 999px;
    margin-bottom: 18px;
    letter-spacing: 0.5px;
  }

  .section-head h2 {
    font-size: 40px;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--primary-dark);
    margin-bottom: 16px;
  }

  .section-head p {
    font-size: 17px;
    color: var(--text-muted);
    line-height: 1.7;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 30px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 600;
    transition: var(--transition);
    white-space: nowrap;
    cursor: pointer;
    border: 2px solid transparent;
  }

  .btn-accent {
    background: var(--accent);
    color: #101a24;
  }

  .btn-accent:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(212, 168, 67, 0.35);
  }

  .btn-outline {
    border-color: rgba(255, 255, 255, 0.7);
    color: #fff;
  }

  .btn-outline:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: translateY(-2px);
    border-color: #fff;
  }

  .btn-dark {
    background: var(--primary-dark);
    color: #fff;
  }

  .btn-dark:hover {
    background: #1e2a3a;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(16, 26, 36, 0.25);
  }

  .btn-secondary {
    background: #fff;
    color: var(--primary-dark);
    border-color: var(--border-color);
  }

  .btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
  }

  .btn-sm {
    padding: 10px 22px;
    font-size: 14px;
  }

  .btn-lg {
    padding: 18px 38px;
    font-size: 16px;
  }

  .badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 14px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    background: rgba(212, 168, 67, 0.12);
    color: #a87e2c;
  }

  .badge-dark {
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
  }

  .badge-surface {
    background: var(--bg-light);
    color: var(--text-muted);
  }

  .icon-circle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: linear-gradient(135deg, #1e2a3a, #101a24);
    color: var(--accent);
    font-size: 20px;
    transition: var(--transition);
  }

  /* ===== Header ===== */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 200;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
  }

  .header-top {
    padding: 14px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  }

  .header-top-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
  }

  .logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
  }

  .logo-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 12px;
    color: var(--accent);
    font-size: 20px;
    box-shadow: 0 4px 12px rgba(16, 26, 36, 0.25);
  }

  .logo-text {
    font-size: 22px;
    font-weight: 800;
    color: var(--primary-dark);
    letter-spacing: -0.01em;
    line-height: 1.2;
  }

  .logo-sub {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 3px;
  }

  .header-tools {
    display: flex;
    align-items: center;
    gap: 14px;
  }

  .search-wrap {
    position: relative;
    display: flex;
    align-items: center;
  }

  .search-wrap .search-input {
    width: 220px;
    height: 42px;
    padding: 0 44px 0 18px;
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    font-size: 14px;
    transition: var(--transition);
  }

  .search-wrap .search-input:focus {
    border-color: var(--accent);
    background: #fff;
    box-shadow: 0 0 0 4px rgba(212, 168, 67, 0.1);
    width: 260px;
  }

  .search-wrap .search-btn {
    position: absolute;
    right: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    color: var(--text-muted);
    transition: var(--transition);
  }

  .search-wrap .search-btn:hover {
    color: var(--accent);
  }

  .menu-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 10px;
    background: var(--bg-light);
    color: var(--primary-dark);
    font-size: 18px;
    transition: var(--transition);
    border: 1px solid var(--border-color);
  }

  .menu-toggle:hover {
    background: var(--primary-dark);
    color: #fff;
  }

  .header-nav {
    background: var(--primary-dark);
  }

  .nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
    overflow-x: auto;
    scrollbar-width: none;
  }

  .nav-links::-webkit-scrollbar {
    display: none;
  }

  .nav-link {
    display: block;
    padding: 15px 24px;
    font-size: 15px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.75);
    transition: var(--transition);
    position: relative;
    white-space: nowrap;
  }

  .nav-link:hover {
    color: #fff;
  }

  .nav-link::after {
    content: "";
    position: absolute;
    left: 24px;
    right: 24px;
    bottom: 0;
    height: 3px;
    background: var(--accent);
    border-radius: 3px 3px 0 0;
    transform: scaleX(0);
    transition: transform 0.25s ease;
  }

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

  .nav-link.active {
    color: #fff;
  }

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

  /* Mobile Nav */
  .mobile-menu {
    display: none;
    background: #fff;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
    padding: 12px 0;
  }

  .mobile-menu.open {
    display: block;
  }

  .mobile-menu a {
    display: block;
    padding: 13px 24px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-main);
    border-radius: 8px;
    margin: 2px 12px;
  }

  .mobile-menu a:hover {
    background: var(--bg-light);
    color: var(--accent);
  }

  .mobile-menu a.active {
    color: var(--accent);
    background: rgba(212, 168, 67, 0.08);
  }

  /* ===== Hero ===== */
  .hero {
    position: relative;
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    min-height: 620px;
    display: flex;
    align-items: center;
    overflow: hidden;
  }

  .hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(10, 17, 25, 0.92) 0%, rgba(16, 26, 36, 0.75) 50%, rgba(16, 26, 36, 0.45) 100%);
  }

  .hero::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 120px;
    background: linear-gradient(transparent, rgba(247, 248, 252, 1));
  }

  .hero-content {
    position: relative;
    z-index: 2;
    padding-top: 80px;
    padding-bottom: 100px;
    max-width: 720px;
    margin-left: 0;
  }

  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(212, 168, 67, 0.15);
    border: 1px solid rgba(212, 168, 67, 0.3);
    color: #ddc283;
    font-size: 14px;
    font-weight: 600;
    padding: 6px 18px;
    border-radius: 999px;
    margin-bottom: 24px;
    letter-spacing: 1px;
  }

  .hero h1 {
    font-size: 58px;
    font-weight: 800;
    color: #fff;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
  }

  .hero h1 span {
    color: var(--accent);
  }

  .hero-subtitle {
    font-size: 20px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 16px;
  }

  .hero-desc {
    font-size: 17px;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 36px;
    max-width: 560px;
  }

  .hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
  }

  .hero-metrics {
    display: flex;
    gap: 40px;
    margin-top: 48px;
    padding-top: 36px;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
  }

  .hero-metric {
    display: flex;
    flex-direction: column;
  }

  .hero-metric .num {
    font-size: 32px;
    font-weight: 800;
    color: #fff;
    line-height: 1.1;
  }

  .hero-metric .label {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 4px;
  }

  /* ===== Core Section ===== */
  .section-core {
    background: var(--bg-light);
    padding: 96px 0 56px;
  }

  .core-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
  }

  .core-card {
    background: #fff;
    border: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
  }

  .core-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), transparent);
    opacity: 0;
    transition: opacity 0.3s;
  }

  .core-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(212, 168, 67, 0.3);
  }

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

  .core-card .icon-circle {
    margin-bottom: 24px;
    width: 56px;
    height: 56px;
    font-size: 24px;
  }

  .core-card h3 {
    font-size: 19px;
    color: var(--primary-dark);
    margin-bottom: 12px;
  }

  .core-card p {
    font-size: 15px;
    color: var(--text-muted);
    line-height: 1.7;
  }

  /* ===== Categories ===== */
  .section-categories {
    background: #fff;
    padding: 96px 0;
  }

  .category-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
  }

  .category-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: #fff;
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    position: relative;
  }

  .category-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(212, 168, 67, 0.25);
  }

  .category-card .cover {
    position: relative;
    height: 240px;
    overflow: hidden;
  }

  .category-card .cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
  }

  .category-card:hover .cover img {
    transform: scale(1.05);
  }

  .category-card .cover::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(transparent 40%, rgba(16, 26, 36, 0.6));
  }

  .category-card .cover .badge {
    position: absolute;
    top: 16px;
    left: 16px;
    z-index: 2;
    background: rgba(212, 168, 67, 0.92);
    color: #101a24;
    font-weight: 700;
  }

  .category-card .body {
    padding: 24px;
  }

  .category-card h3 {
    font-size: 20px;
    color: var(--primary-dark);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .category-card h3 i {
    color: var(--accent);
    font-size: 16px;
    opacity: 0;
    transform: translateX(-8px);
    transition: var(--transition);
  }

  .category-card:hover h3 i {
    opacity: 1;
    transform: translateX(0);
  }

  .category-card p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.65;
    margin-bottom: 16px;
  }

  .category-card .meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 13px;
    color: var(--text-muted);
  }

  .category-card .meta span {
    display: flex;
    align-items: center;
    gap: 5px;
  }

  /* ===== Articles ===== */
  .section-articles {
    background: var(--bg-light);
    padding: 96px 0;
  }

  .article-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
  }

  .article-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
  }

  .article-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
  }

  .article-card .cover {
    position: relative;
    height: 190px;
    overflow: hidden;
    background: #e8ecf1;
  }

  .article-card .cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
  }

  .article-card:hover .cover img {
    transform: scale(1.04);
  }

  .article-card .cover .badge {
    position: absolute;
    top: 12px;
    left: 12px;
    z-index: 2;
    background: rgba(16, 26, 36, 0.85);
    color: #fff;
    font-size: 12px;
    backdrop-filter: blur(4px);
  }

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

  .article-card h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--primary-dark);
    line-height: 1.4;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .article-card h3 a:hover {
    color: var(--accent);
  }

  .article-card p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
  }

  .article-card .footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 16px;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
    font-size: 13px;
    color: var(--text-muted);
  }

  .article-card .footer a {
    color: var(--accent);
    font-weight: 600;
    font-size: 13px;
  }

  .article-card .footer a:hover {
    color: var(--accent-hover);
  }

  .empty-tip {
    grid-column: 1 / -1;
    text-align: center;
    padding: 40px;
    background: #fff;
    border-radius: var(--radius-lg);
    border: 1px dashed var(--border-color);
    font-size: 16px;
    color: var(--text-muted);
  }

  /* ===== Stats Section ===== */
  .section-stats {
    background: var(--primary-dark);
    padding: 80px 0;
    position: relative;
    overflow: hidden;
  }

  .section-stats::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 80% 30%, rgba(212, 168, 67, 0.12), transparent 55%);
  }

  .section-stats .container {
    position: relative;
    z-index: 2;
  }

  .stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    text-align: center;
  }

  .stat-item {
    padding: 24px 16px;
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    transition: var(--transition);
  }

  .stat-item:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-4px);
  }

  .stat-item .num {
    font-size: 42px;
    font-weight: 800;
    color: var(--accent);
    line-height: 1.1;
    margin-bottom: 8px;
  }

  .stat-item .label {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.7);
  }

  .section-stats .process {
    margin-top: 56px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
  }

  .process-step {
    position: relative;
    padding: 28px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition);
  }

  .process-step:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-4px);
  }

  .process-step .step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--accent);
    color: #10203a;
    font-size: 18px;
    font-weight: 800;
    margin-bottom: 18px;
  }

  .process-step h4 {
    color: #fff;
    font-size: 18px;
    margin-bottom: 8px;
  }

  .process-step p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.6;
  }

  /* ===== Features ===== */
  .section-features {
    background: #fff;
    padding: 96px 0;
  }

  .feature-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    margin-bottom: 48px;
  }

  .feature-row:last-child {
    margin-bottom: 0;
  }

  .feature-media {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
  }

  .feature-media img {
    width: 100%;
    height: 360px;
    object-fit: cover;
  }

  .feature-media::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(transparent 60%, rgba(16, 26, 36, 0.35));
  }

  .feature-content h3 {
    font-size: 28px;
    color: var(--primary-dark);
    margin-bottom: 16px;
  }

  .feature-content p {
    font-size: 16px;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 24px;
  }

  .feature-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
  }

  .feature-list li {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    font-size: 15px;
    color: #334155;
    line-height: 1.6;
  }

  .feature-list li i {
    color: var(--accent);
    font-size: 18px;
    margin-top: 2px;
    flex-shrink: 0;
  }

  /* ===== FAQ ===== */
  .section-faq {
    background: var(--bg-light);
    padding: 96px 0;
  }

  .faq-wrap {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
  }

  .faq-item {
    background: #fff;
    border: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
  }

  .faq-item:hover {
    border-color: rgba(212, 168, 67, 0.3);
    box-shadow: var(--shadow-md);
  }

  .faq-item summary {
    padding: 22px 28px;
    font-size: 16px;
    font-weight: 600;
    color: var(--primary-dark);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 14px;
    list-style: none;
    position: relative;
    padding-right: 56px;
    transition: var(--transition);
  }

  .faq-item summary::-webkit-details-marker {
    display: none;
  }

  .faq-item summary::after {
    content: "+";
    position: absolute;
    right: 24px;
    font-size: 24px;
    font-weight: 300;
    color: var(--accent);
    transition: transform 0.3s ease;
  }

  .faq-item[open] summary::after {
    transform: rotate(45deg);
  }

  .faq-item summary .faq-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: rgba(212, 168, 67, 0.1);
    color: var(--accent);
    font-size: 14px;
    flex-shrink: 0;
  }

  .faq-item[open] summary {
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  }

  .faq-item p {
    padding: 20px 28px 24px 70px;
    font-size: 15px;
    color: var(--text-muted);
    line-height: 1.7;
    background: rgba(247, 248, 252, 0.5);
  }

  /* ===== CTA ===== */
  .section-cta {
    background: var(--primary-dark);
    padding: 100px 0;
    position: relative;
    overflow: hidden;
  }

  .section-cta::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
    opacity: 0.18;
  }

  .section-cta::after {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 50%, rgba(212, 168, 67, 0.15), transparent 60%);
  }

  .cta-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 680px;
    margin: 0 auto;
  }

  .cta-content h2 {
    font-size: 40px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
  }

  .cta-content p {
    font-size: 17px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
    margin-bottom: 36px;
  }

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

  /* ===== Footer ===== */
  .site-footer {
    background: #0a1119;
    padding: 72px 0 0;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 56px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .footer-brand .logo-text {
    color: #fff;
  }

  .footer-brand .logo-sub {
    color: var(--accent);
  }

  .footer-brand p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 15px;
    margin-top: 18px;
    line-height: 1.7;
    max-width: 320px;
  }

  .footer-brand .social {
    display: flex;
    gap: 12px;
    margin-top: 24px;
  }

  .footer-brand .social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.06);
    color: rgba(255, 255, 255, 0.7);
    font-size: 15px;
    transition: var(--transition);
  }

  .footer-brand .social a:hover {
    background: var(--accent);
    color: #101a24;
    transform: translateY(-3px);
  }

  .footer-col h4 {
    color: #fff;
    font-size: 16px;
    margin-bottom: 20px;
    font-weight: 700;
  }

  .footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .footer-col ul a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }

  .footer-col ul a:hover {
    color: var(--accent);
    transform: translateX(4px);
  }

  .footer-contact p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .footer-contact p i {
    color: var(--accent);
    width: 16px;
  }

  .footer-bottom {
    padding: 24px 0;
    text-align: center;
  }

  .footer-bottom p {
    color: rgba(255, 255, 255, 0.4);
    font-size: 13px;
    line-height: 1.6;
  }

  .footer-bottom span {
    color: rgba(255, 255, 255, 0.5);
  }

  /* ===== Responsive ===== */
  @media (max-width: 1024px) {
    .core-grid,
    .category-grid,
    .article-grid {
      grid-template-columns: repeat(2, 1fr);
    }

    .feature-row {
      gap: 40px;
    }

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

  @media (max-width: 768px) {
    .section {
      padding: 72px 0;
    }

    .section-head h2 {
      font-size: 30px;
    }

    .search-wrap {
      display: none;
    }

    .menu-toggle {
      display: flex;
    }

    .header-nav {
      display: none;
    }

    .hero {
      min-height: 540px;
    }

    .hero h1 {
      font-size: 38px;
    }

    .hero-subtitle {
      font-size: 17px;
    }

    .hero-desc {
      font-size: 15px;
    }

    .hero-metrics {
      gap: 24px;
      flex-wrap: wrap;
    }

    .hero-metric .num {
      font-size: 24px;
    }

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

    .section-stats .process {
      grid-template-columns: 1fr;
    }

    .feature-row {
      grid-template-columns: 1fr;
    }

    .feature-media img {
      height: 260px;
    }

    .footer-grid {
      grid-template-columns: 1fr;
      gap: 36px;
    }
  }

  @media (max-width: 520px) {
    .container {
      padding: 0 16px;
    }

    .section {
      padding: 56px 0;
    }

    .section-head {
      margin-bottom: 36px;
    }

    .section-head h2 {
      font-size: 26px;
    }

    .core-grid,
    .category-grid,
    .article-grid {
      grid-template-columns: 1fr;
    }

    .hero {
      min-height: 480px;
    }

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

    .hero-subtitle {
      font-size: 16px;
    }

    .hero-actions {
      flex-direction: column;
      width: 100%;
    }

    .hero-actions .btn {
      width: 100%;
    }

    .hero-metrics {
      flex-direction: column;
      gap: 20px;
    }

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

    .stat-item .num {
      font-size: 32px;
    }

    .feature-content h3 {
      font-size: 24px;
    }

    .faq-item summary {
      padding: 18px 20px;
      padding-right: 44px;
    }

    .faq-item p {
      padding: 16px 20px 20px;
    }

    .btn-lg {
      padding: 16px 28px;
      font-size: 15px;
      width: 100%;
      justify-content: center;
    }

    .cta-actions {
      width: 100%;
      flex-direction: column;
    }

    .cta-actions .btn {
      width: 100%;
      justify-content: center;
    }

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

  @media (min-width: 769px) {
    .mobile-menu {
      display: none !important;
    }
  }

  /* Focus & Accessibility */
  a:focus-visible,
  button:focus-visible,
  input:focus-visible,
  summary:focus-visible {
    outline: 3px solid rgba(212, 168, 67, 0.45);
    outline-offset: 2px;
    border-radius: 4px;
  }

  .faq-item summary:focus-visible {
    outline-color: rgba(212, 168, 67, 0.6);
  }

/* roulang page: category1 */
:root {
      --primary: #0f4c81;
      --primary-light: #1a6db5;
      --secondary: #e8b737;
      --ink: #1a2233;
      --muted: #6b7787;
      --soft: #f4f7fb;
      --line: #e2e8f0;
    }
    * {
      box-sizing: border-box;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: system-ui, -apple-system, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      background: #fff;
      color: var(--ink);
      line-height: 1.7;
      margin: 0;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color .2s;
    }
    a:focus-visible,
    button:focus-visible,
    input:focus-visible {
      outline: 3px solid rgba(232, 183, 55, .5);
      outline-offset: 2px;
    }
    /* ===== 顶部品牌行 ===== */
    .topbar {
      background: var(--ink);
      color: #cfd8e3;
      font-size: 13px;
      padding: 6px 0;
      letter-spacing: .02em;
    }
    .topbar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
    }
    .topbar-left {
      display: flex;
      gap: 16px;
      align-items: center;
    }
    .topbar-right {
      display: flex;
      gap: 14px;
      align-items: center;
    }
    .topbar a {
      color: #cfd8e3;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .topbar a:hover {
      color: var(--secondary);
    }
    /* ===== 品牌行 ===== */
    .header-main {
      background: #fff;
      border-bottom: 1px solid var(--line);
      padding: 16px 0;
    }
    .header-main .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }
    .logo {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }
    .logo-badge {
      width: 44px;
      height: 44px;
      border-radius: 12px;
      background: linear-gradient(135deg, var(--primary), var(--primary-light));
      color: #fff;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      box-shadow: 0 4px 12px rgba(15, 76, 129, .3);
    }
    .logo-text {
      font-size: 22px;
      font-weight: 800;
      color: var(--ink);
      letter-spacing: 2px;
      line-height: 1.2;
    }
    .logo-sub {
      display: block;
      font-size: 10px;
      letter-spacing: 6px;
      color: var(--muted);
      font-weight: 500;
      margin-top: 2px;
    }
    .header-search {
      display: flex;
      align-items: center;
      background: var(--soft);
      border: 1px solid var(--line);
      border-radius: 999px;
      padding: 8px 16px;
      gap: 8px;
      flex: 0 1 320px;
      transition: border-color .2s, box-shadow .2s;
    }
    .header-search:focus-within {
      border-color: var(--primary-light);
      box-shadow: 0 0 0 3px rgba(26, 109, 181, .1);
    }
    .header-search i {
      color: var(--muted);
      font-size: 14px;
    }
    .header-search input {
      border: none;
      background: transparent;
      outline: none;
      flex: 1;
      font-size: 14px;
      color: var(--ink);
      min-width: 0;
    }
    .header-search input::placeholder {
      color: #9aa5b1;
    }
    .header-side {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    /* ===== 频道导航 ===== */
    .header-nav {
      background: #fff;
      border-bottom: 1px solid var(--line);
      position: sticky;
      top: 0;
      z-index: 100;
      box-shadow: 0 1px 4px rgba(26, 34, 51, .05);
    }
    .nav-links {
      display: flex;
      list-style: none;
      margin: 0;
      padding: 0;
      gap: 4px;
    }
    .nav-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 14px 18px;
      font-size: 15px;
      font-weight: 600;
      color: var(--muted);
      border-bottom: 3px solid transparent;
      transition: color .2s, border-color .2s;
    }
    .nav-link:hover {
      color: var(--primary);
    }
    .nav-link.active {
      color: var(--primary);
      border-bottom-color: var(--primary);
    }
    /* ===== 通用容器 ===== */
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    .section {
      padding: 72px 0;
    }
    .section-alt {
      background: var(--soft);
    }
    .section-head {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 48px;
    }
    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(15, 76, 129, .08);
      color: var(--primary);
      font-size: 13px;
      font-weight: 700;
      padding: 6px 14px;
      border-radius: 999px;
      letter-spacing: 1px;
      margin-bottom: 14px;
    }
    .section-title {
      font-size: 34px;
      font-weight: 800;
      color: var(--ink);
      line-height: 1.3;
      letter-spacing: -.5px;
    }
    .section-desc {
      color: var(--muted);
      font-size: 15px;
      margin-top: 12px;
      line-height: 1.8;
    }
    /* ===== 按钮 ===== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 28px;
      border-radius: 999px;
      font-size: 15px;
      font-weight: 700;
      border: none;
      cursor: pointer;
      transition: all .25s ease;
      line-height: 1.5;
    }
    .btn-primary {
      background: var(--primary);
      color: #fff;
      box-shadow: 0 4px 14px rgba(15, 76, 129, .25);
    }
    .btn-primary:hover {
      background: var(--primary-light);
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(15, 76, 129, .3);
    }
    .btn-secondary {
      background: var(--secondary);
      color: var(--ink);
      box-shadow: 0 4px 14px rgba(232, 183, 55, .35);
    }
    .btn-secondary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(232, 183, 55, .4);
      background: #f0c247;
    }
    .btn-outline {
      background: transparent;
      color: var(--primary);
      border: 2px solid var(--primary);
    }
    .btn-outline:hover {
      background: rgba(15, 76, 129, .06);
      transform: translateY(-2px);
    }
    /* ===== 页面 Banner ===== */
    .page-hero {
      position: relative;
      padding: 96px 0 88px;
      background: linear-gradient(135deg, rgba(15, 76, 129, .93), rgba(26, 109, 181, .82)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
      color: #fff;
      text-align: center;
    }
    .page-hero::after {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(rgba(232, 183, 55, .12) 1px, transparent 1px);
      background-size: 24px 24px;
      pointer-events: none;
    }
    .page-hero .container {
      position: relative;
      z-index: 2;
    }
    .page-hero h1 {
      font-size: 44px;
      font-weight: 800;
      letter-spacing: 1px;
      margin: 0 0 16px;
      line-height: 1.25;
    }
    .page-hero p {
      font-size: 17px;
      max-width: 640px;
      margin: 0 auto;
      opacity: .92;
      line-height: 1.8;
    }
    .breadcrumb {
      display: inline-flex;
      gap: 8px;
      font-size: 13px;
      background: rgba(255, 255, 255, .15);
      padding: 6px 16px;
      border-radius: 999px;
      margin-bottom: 20px;
      backdrop-filter: blur(4px);
    }
    .breadcrumb a {
      opacity: .85;
    }
    .breadcrumb a:hover {
      opacity: 1;
    }
    .breadcrumb .sep {
      opacity: .5;
    }
    /* ===== 卡片 ===== */
    .card {
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 16px;
      box-shadow: 0 1px 3px rgba(15, 76, 129, .06);
      transition: transform .25s, box-shadow .25s, border-color .25s;
      overflow: hidden;
    }
    .card:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 32px rgba(15, 76, 129, .1);
      border-color: rgba(15, 76, 129, .2);
    }
    .card-img {
      height: 180px;
      overflow: hidden;
      position: relative;
    }
    .card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform .45s ease;
    }
    .card:hover .card-img img {
      transform: scale(1.05);
    }
    .card-img .tag {
      position: absolute;
      top: 12px;
      left: 12px;
      background: rgba(15, 76, 129, .9);
      color: #fff;
      font-size: 12px;
      padding: 4px 12px;
      border-radius: 999px;
      backdrop-filter: blur(4px);
    }
    .card-body {
      padding: 22px;
    }
    .card-body h3 {
      font-size: 17px;
      font-weight: 700;
      line-height: 1.5;
      margin: 0 0 10px;
      color: var(--ink);
    }
    .card-body p {
      font-size: 14px;
      color: var(--muted);
      line-height: 1.7;
      margin: 0 0 14px;
    }
    .card-meta {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 12px;
      color: #9aa5b1;
    }
    /* ===== 徽章 ===== */
    .pill {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      padding: 4px 14px;
      border-radius: 999px;
      font-size: 12px;
      font-weight: 600;
    }
    .pill-primary {
      background: rgba(15, 76, 129, .08);
      color: var(--primary);
    }
    .pill-gold {
      background: rgba(232, 183, 55, .15);
      color: #a67c00;
    }
    /* ===== 流程步骤 ===== */
    .step-wrap {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin-top: 12px;
    }
    .step-item {
      text-align: center;
      padding: 32px 20px;
      background: #fff;
      border-radius: 16px;
      border: 1px solid var(--line);
      position: relative;
      transition: transform .25s, box-shadow .25s;
    }
    .step-item:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 32px rgba(15, 76, 129, .08);
    }
    .step-num {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--primary-light));
      color: #fff;
      font-weight: 800;
      font-size: 18px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
      box-shadow: 0 4px 12px rgba(15, 76, 129, .25);
    }
    .step-item h3 {
      font-size: 16px;
      font-weight: 700;
      margin: 0 0 8px;
    }
    .step-item p {
      font-size: 13px;
      color: var(--muted);
      line-height: 1.6;
      margin: 0;
    }
    /* ===== 功能入口 ===== */
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-item {
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 16px;
      padding: 28px 24px;
      transition: all .25s ease;
      position: relative;
    }
    .feature-item:hover {
      border-color: var(--primary);
      box-shadow: 0 12px 32px rgba(15, 76, 129, .08);
      transform: translateY(-3px);
    }
    .feature-icon {
      width: 52px;
      height: 52px;
      border-radius: 14px;
      background: rgba(15, 76, 129, .08);
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 16px;
    }
    .feature-item h3 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .feature-item p {
      font-size: 14px;
      color: var(--muted);
      line-height: 1.7;
      margin-bottom: 14px;
    }
    .feature-link {
      font-size: 13px;
      font-weight: 700;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .feature-link:hover {
      gap: 8px;
    }
    /* ===== 安全提示 ===== */
    .safety-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .safety-item {
      text-align: center;
      padding: 30px 16px;
      border-radius: 16px;
      background: #fff;
      border: 1px solid var(--line);
      transition: all .25s;
    }
    .safety-item:hover {
      transform: translateY(-3px);
      box-shadow: 0 8px 24px rgba(15, 76, 129, .06);
    }
    .safety-item i {
      font-size: 32px;
      color: var(--primary);
      margin-bottom: 12px;
    }
    .safety-item h3 {
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 6px;
    }
    .safety-item p {
      font-size: 13px;
      color: var(--muted);
      line-height: 1.6;
      margin: 0;
    }
    /* ===== FAQ ===== */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 14px;
      margin-bottom: 14px;
      overflow: hidden;
      transition: box-shadow .25s;
    }
    .faq-item:hover {
      box-shadow: 0 4px 16px rgba(15, 76, 129, .07);
    }
    .faq-q {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 24px;
      cursor: pointer;
      font-weight: 700;
      font-size: 15px;
      color: var(--ink);
      gap: 12px;
      background: transparent;
      border: none;
      width: 100%;
      text-align: left;
      transition: background .2s;
    }
    .faq-q:hover {
      background: rgba(15, 76, 129, .03);
    }
    .faq-q i {
      color: var(--primary);
      transition: transform .3s;
      font-size: 14px;
      flex-shrink: 0;
    }
    .faq-item.open .faq-q i {
      transform: rotate(180deg);
    }
    .faq-a {
      max-height: 0;
      overflow: hidden;
      transition: max-height .35s ease;
    }
    .faq-a-inner {
      padding: 0 24px 20px;
      color: var(--muted);
      font-size: 14px;
      line-height: 1.8;
    }
    .faq-item.open .faq-a {
      max-height: 400px;
    }
    /* ===== CTA ===== */
    .cta-box {
      background: linear-gradient(135deg, var(--primary), var(--primary-light));
      border-radius: 24px;
      padding: 56px 48px;
      text-align: center;
      color: #fff;
      position: relative;
      overflow: hidden;
    }
    .cta-box::before {
      content: '';
      position: absolute;
      top: -50px;
      right: -50px;
      width: 180px;
      height: 180px;
      border-radius: 50%;
      background: rgba(255, 255, 255, .08);
    }
    .cta-box h2 {
      font-size: 30px;
      font-weight: 800;
      margin: 0 0 12px;
    }
    .cta-box p {
      opacity: .9;
      margin-bottom: 24px;
      font-size: 15px;
    }
    /* ===== 页脚 ===== */
    .site-footer {
      background: #151d29;
      color: #aab8c5;
      padding-top: 60px;
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1.2fr;
      gap: 40px;
      padding-bottom: 40px;
      border-bottom: 1px solid rgba(255, 255, 255, .08);
    }
    .footer-brand .logo-text {
      color: #fff;
    }
    .footer-brand .logo-sub {
      color: #7e8ea0;
    }
    .footer-brand p {
      margin: 18px 0 20px;
      line-height: 1.8;
      opacity: .8;
    }
    .social {
      display: flex;
      gap: 12px;
    }
    .social a {
      width: 38px;
      height: 38px;
      border-radius: 10px;
      border: 1px solid rgba(255, 255, 255, .15);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: #aab8c5;
      transition: all .25s;
    }
    .social a:hover {
      background: var(--secondary);
      color: #151d29;
      border-color: var(--secondary);
    }
    .footer-col h4 {
      color: #fff;
      font-size: 16px;
      margin: 0 0 18px;
      position: relative;
      padding-bottom: 10px;
    }
    .footer-col h4::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: 0;
      width: 30px;
      height: 2px;
      background: var(--secondary);
      border-radius: 2px;
    }
    .footer-col ul {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-col ul li {
      margin-bottom: 10px;
    }
    .footer-col ul a {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: #aab8c5;
      transition: color .2s, transform .2s;
    }
    .footer-col ul a:hover {
      color: var(--secondary);
      transform: translateX(3px);
    }
    .footer-col ul a i {
      font-size: 12px;
    }
    .footer-contact p {
      margin: 0 0 10px;
      display: flex;
      align-items: center;
      gap: 8px;
      opacity: .85;
    }
    .footer-contact p i {
      color: var(--secondary);
      width: 16px;
    }
    .footer-bottom {
      text-align: center;
      padding: 20px 0;
      font-size: 13px;
      opacity: .7;
    }
    /* ===== 响应式 ===== */
    @media (max-width: 992px) {
      .header-main .container {
        flex-wrap: wrap;
      }
      .header-search {
        flex: 1 1 100%;
        order: 3;
      }
      .feature-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .step-wrap {
        grid-template-columns: repeat(2, 1fr);
      }
      .safety-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      .topbar-right span {
        display: none;
      }
      .section {
        padding: 48px 0;
      }
      .section-title {
        font-size: 26px;
      }
      .page-hero {
        padding: 56px 0 48px;
      }
      .page-hero h1 {
        font-size: 28px;
      }
      .nav-links {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
      }
      .nav-links::-webkit-scrollbar {
        display: none;
      }
      .nav-link {
        padding: 12px 14px;
        font-size: 14px;
        white-space: nowrap;
      }
      .cta-box {
        padding: 36px 20px;
        border-radius: 16px;
      }
      .cta-box h2 {
        font-size: 22px;
      }
    }
    @media (max-width: 520px) {
      .container {
        padding: 0 14px;
      }
      .feature-grid {
        grid-template-columns: 1fr;
      }
      .step-wrap {
        grid-template-columns: 1fr;
      }
      .safety-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .logo-text {
        font-size: 18px;
      }
      .logo-badge {
        width: 38px;
        height: 38px;
        font-size: 16px;
      }
      .header-side .btn {
        padding: 8px 16px;
        font-size: 13px;
      }
      .topbar-left span {
        display: none;
      }
    }

/* roulang page: article */
:root {
    --primary: #1a2d4a;
    --primary-light: #2a4568;
    --primary-dark: #0f1d30;
    --accent: #d4a853;
    --accent-hover: #c1953a;
    --bg: #f6f7f9;
    --bg-warm: #faf7f2;
    --card: #ffffff;
    --text: #1e293b;
    --text-weak: #64748b;
    --border: #e2e8f0;
    --rounded: 14px;
    --rounded-sm: 10px;
    --shadow: 0 4px 24px rgba(26, 45, 74, 0.08);
    --shadow-hover: 0 12px 32px rgba(26, 45, 74, 0.14);
    --container: 1200px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: all 0.3s ease; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; font-size: 1rem; outline: none; }

.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Header ===== */
.site-header {
    background: var(--card);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 12px rgba(26, 45, 74, 0.04);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    gap: 20px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}
.logo-badge {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.1rem;
    box-shadow: 0 4px 12px rgba(26, 45, 74, 0.25);
}
.logo-text {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: 1px;
    line-height: 1.1;
}
.logo-sub {
    display: block;
    font-size: 0.6rem;
    font-weight: 400;
    letter-spacing: 0.4em;
    color: var(--accent);
    text-transform: uppercase;
}
.header-tools {
    display: flex;
    align-items: center;
    gap: 16px;
}
.search-form {
    display: flex;
    align-items: center;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 50px;
    padding: 4px 6px 4px 18px;
    transition: border-color 0.3s;
}
.search-form:focus-within {
    border-color: var(--accent);
    background: #fff;
}
.search-form input {
    border: none;
    background: transparent;
    font-size: 0.9rem;
    color: var(--text);
    width: 180px;
}
.search-form input::placeholder { color: var(--text-weak); }
.search-form button {
    width: 34px;
    height: 34px;
    background: var(--primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    transition: background 0.3s;
}
.search-form button:hover { background: var(--accent); }

/* ===== Nav ===== */
.header-nav {
    background: var(--primary);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.nav-links {
    display: flex;
    list-style: none;
    gap: 0;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}
.nav-links::-webkit-scrollbar { display: none; }
.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 14px 26px;
    color: rgba(255, 255, 255, 0.82);
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    border-bottom: 3px solid transparent;
    transition: all 0.3s ease;
    white-space: nowrap;
}
.nav-link:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.08);
}
.nav-link.active {
    color: #fff;
    border-bottom-color: var(--accent);
    background: rgba(255, 255, 255, 0.05);
    font-weight: 600;
}
.nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--bg);
    border: 1px solid var(--border);
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1.15rem;
}

/* ===== Article Hero ===== */
.article-hero {
    position: relative;
    background-size: cover;
    background-position: center;
    padding: 72px 0 64px;
    overflow: hidden;
}
.article-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(15, 29, 48, 0.93), rgba(26, 45, 74, 0.78));
    z-index: 1;
}
.article-hero-inner {
    position: relative;
    z-index: 2;
    max-width: 860px;
}
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 24px;
}
.breadcrumb a { color: rgba(255, 255, 255, 0.75); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb i { font-size: 0.7rem; }
.cat-badge {
    display: inline-block;
    background: var(--accent);
    color: var(--primary-dark);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 1px;
    padding: 5px 16px;
    border-radius: 50px;
    margin-bottom: 20px;
}
.article-hero h1 {
    font-size: 2.4rem;
    font-weight: 800;
    color: #fff;
    line-height: 1.35;
    letter-spacing: 0.5px;
    margin-bottom: 20px;
    text-shadow: 0 2px 16px rgba(0, 0, 0, 0.15);
}
.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    color: rgba(255, 255, 255, 0.82);
    font-size: 0.88rem;
}
.article-meta span { display: inline-flex; align-items: center; gap: 7px; }
.article-meta i { color: var(--accent); }

/* ===== Article Body ===== */
.article-body-section {
    padding: 56px 0;
    background: var(--bg);
}
.article-layout {
    max-width: 860px;
    margin: 0 auto;
}
.article-main {
    background: var(--card);
    border-radius: var(--rounded);
    box-shadow: var(--shadow);
    padding: 48px;
}

.article-content {
    font-size: 1.06rem;
    line-height: 1.9;
    color: var(--text);
}
.article-content p {
    margin-bottom: 1.6em;
}
.article-content h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    margin: 2em 0 1em;
    padding-bottom: 0.5em;
    border-bottom: 2px solid var(--border);
    letter-spacing: 1px;
}
.article-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary);
    margin: 1.8em 0 0.8em;
}
.article-content h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary);
    margin: 1.5em 0 0.6em;
}
.article-content ul,
.article-content ol {
    margin: 0 0 1.6em 1.4em;
}
.article-content ul li,
.article-content ol li {
    margin-bottom: 0.6em;
    padding-left: 4px;
}
.article-content ul li::marker {
    color: var(--accent);
}
.article-content blockquote {
    border-left: 4px solid var(--accent);
    background: var(--bg-warm);
    padding: 1.2em 1.6em;
    margin: 1.8em 0;
    border-radius: 0 var(--rounded) var(--rounded) 0;
    font-style: italic;
    color: var(--primary);
    position: relative;
}
.article-content img {
    border-radius: var(--rounded);
    box-shadow: var(--shadow);
    margin: 1.5em 0;
}
.article-content a {
    color: var(--primary);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-color: var(--accent);
}
.article-content a:hover {
    color: var(--accent);
}
.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5em 0;
    font-size: 0.95rem;
}
.article-content table th,
.article-content table td {
    border: 1px solid var(--border);
    padding: 0.7em 1em;
    text-align: left;
}
.article-content table th {
    background: var(--bg);
    font-weight: 600;
    color: var(--primary);
}
.article-content code {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 2px 6px;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    font-size: 0.88em;
}

/* ===== Empty State ===== */
.empty-state {
    text-align: center;
    padding: 80px 40px;
}
.empty-state i {
    font-size: 3.5rem;
    color: var(--accent);
    margin-bottom: 24px;
    display: inline-block;
}
.empty-state h2 {
    font-size: 1.8rem;
    color: var(--primary);
    margin-bottom: 12px;
}
.empty-state p {
    color: var(--text-weak);
    font-size: 1rem;
    margin-bottom: 30px;
}

/* ===== Buttons ===== */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--accent);
    color: var(--primary-dark);
    font-weight: 700;
    font-size: 0.95rem;
    padding: 12px 28px;
    border-radius: 50px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 16px rgba(212, 168, 83, 0.3);
}
.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(212, 168, 83, 0.4);
}
.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    border: 2px solid rgba(255, 255, 255, 0.5);
    color: #fff;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 11px 26px;
    border-radius: 50px;
    transition: all 0.3s ease;
}
.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
}

/* ===== Tags & Share ===== */
.article-tags-section {
    background: var(--card);
    border-bottom: 1px solid var(--border);
    padding: 28px 0;
}
.article-tags-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
    max-width: 860px;
    margin: 0 auto;
}
.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--bg);
    border: 1px solid var(--border);
    color: var(--text-weak);
    font-size: 0.82rem;
    padding: 5px 14px;
    border-radius: 50px;
    transition: all 0.3s;
}
.tag:hover {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}
.share {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.88rem;
    color: var(--text-weak);
}
.share-btn {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--bg);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-weak);
    font-size: 0.85rem;
    transition: all 0.3s;
}
.share-btn:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    transform: translateY(-2px);
}

/* ===== Post Nav ===== */
.post-nav-section {
    padding: 36px 0;
    background: var(--bg);
}
.post-nav-row {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    max-width: 860px;
    margin: 0 auto;
    flex-wrap: wrap;
}
.post-nav-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--rounded-sm);
    padding: 14px 24px;
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--primary);
    box-shadow: 0 2px 8px rgba(26, 45, 74, 0.04);
    transition: all 0.3s;
}
.post-nav-btn:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
    border-color: var(--accent);
    color: var(--accent);
}

/* ===== Related ===== */
.related-section {
    padding: 64px 0;
    background: var(--bg-warm);
}
.section-head {
    text-align: center;
    margin-bottom: 44px;
}
.section-head h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: 1px;
    margin-bottom: 8px;
}
.section-head p {
    color: var(--text-weak);
    font-size: 0.95rem;
}
.related-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.related-card {
    background: var(--card);
    border-radius: var(--rounded);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.35s ease;
    display: flex;
    flex-direction: column;
    border: 1px solid transparent;
}
.related-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: var(--accent);
}
.related-thumb {
    position: relative;
    aspect-ratio: 16 / 10;
    overflow: hidden;
}
.related-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}
.related-card:hover .related-thumb img {
    transform: scale(1.05);
}
.related-thumb::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(15, 29, 48, 0.15), transparent);
}
.related-body {
    padding: 20px 22px 22px;
    display: flex;
    flex-direction: column;
    flex: 1;
}
.related-cat {
    display: inline-block;
    width: fit-content;
    background: rgba(212, 168, 83, 0.15);
    color: var(--accent);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 1px;
    padding: 3px 12px;
    border-radius: 50px;
    margin-bottom: 10px;
}
.related-body h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    line-height: 1.5;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.related-body p {
    font-size: 0.85rem;
    color: var(--text-weak);
    line-height: 1.6;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.related-date {
    font-size: 0.78rem;
    color: var(--text-weak);
    margin-top: 14px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.related-date i { color: var(--accent); }

/* ===== CTA ===== */
.cta-section {
    position: relative;
    padding: 64px 0;
    background-image: url('/assets/images/backpic/back-3.png');
    background-size: cover;
    background-position: center;
    overflow: hidden;
}
.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(15, 29, 48, 0.92), rgba(26, 45, 74, 0.86));
}
.cta-inner {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 640px;
    margin: 0 auto;
}
.cta-inner h2 {
    font-size: 2rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 14px;
    letter-spacing: 1px;
}
.cta-inner p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 1rem;
    margin-bottom: 32px;
}
.cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== Footer ===== */
.site-footer {
    background: var(--primary-dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 64px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.2fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-brand .logo {
    margin-bottom: 18px;
}
.footer-brand .logo-text {
    color: #fff;
}
.footer-brand .logo-badge {
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    color: var(--primary-dark);
}
.footer-brand p {
    font-size: 0.88rem;
    line-height: 1.7;
    margin-bottom: 20px;
    color: rgba(255, 255, 255, 0.65);
}
.social {
    display: flex;
    gap: 10px;
}
.social a {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
    transition: all 0.3s;
}
.social a:hover {
    background: var(--accent);
    color: var(--primary-dark);
    transform: translateY(-3px);
}
.footer-col h4 {
    color: #fff;
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: 1px;
    position: relative;
    padding-bottom: 10px;
}
.footer-col h4::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 30px;
    height: 3px;
    background: var(--accent);
    border-radius: 3px;
}
.footer-col ul {
    list-style: none;
}
.footer-col ul li {
    margin-bottom: 10px;
}
.footer-col ul li a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all 0.3s;
}
.footer-col ul li a:hover {
    color: var(--accent);
    padding-left: 4px;
}
.footer-col ul li a i {
    font-size: 0.7rem;
    color: var(--accent);
}
.footer-contact p {
    font-size: 0.88rem;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.65);
}
.footer-contact p i {
    color: var(--accent);
    width: 18px;
    text-align: center;
}
.footer-bottom {
    text-align: center;
    padding: 22px 0;
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.45);
}
.footer-bottom p { margin: 0; }

/* ===== Divider ===== */
.divider {
    height: 1px;
    background: linear-gradient(to right, transparent, var(--border), transparent);
    border: none;
    margin: 0;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .related-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    .article-hero h1 {
        font-size: 2rem;
    }
}
@media (max-width: 768px) {
    .header-inner {
        height: 60px;
    }
    .search-form input {
        width: 120px;
    }
    .nav-toggle {
        display: flex;
    }
    .header-nav {
        position: relative;
    }
    .nav-links {
        display: none;
        flex-direction: column;
        background: var(--primary);
        padding: 8px 0;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        max-height: calc(100vh - 130px);
        overflow-y: auto;
    }
    .nav-links.open {
        display: flex;
    }
    .nav-link {
        padding: 14px 24px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        border-left: 3px solid transparent;
    }
    .nav-link.active {
        border-left-color: var(--accent);
        border-bottom-color: transparent;
    }
    .article-hero {
        padding: 48px 0 40px;
    }
    .article-hero h1 {
        font-size: 1.6rem;
    }
    .article-main {
        padding: 28px 24px;
    }
    .article-content {
        font-size: 1rem;
    }
    .post-nav-row {
        flex-direction: column;
    }
    .post-nav-btn {
        width: 100%;
        justify-content: center;
    }
}
@media (max-width: 520px) {
    .container {
        padding: 0 16px;
    }
    .logo-text {
        font-size: 1.15rem;
    }
    .logo-badge {
        width: 36px;
        height: 36px;
        font-size: 0.95rem;
    }
    .search-form input {
        width: 80px;
    }
    .article-hero h1 {
        font-size: 1.35rem;
    }
    .article-meta {
        font-size: 0.8rem;
        gap: 10px;
    }
    .article-main {
        padding: 22px 16px;
    }
    .related-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    .cta-inner h2 {
        font-size: 1.5rem;
    }
    .tags {
        width: 100%;
    }
    .share {
        width: 100%;
    }
}

/* roulang page: category2 */
:root {
  --brand: #f97316;
  --brand-dark: #ea580c;
  --brand-light: #ffedd5;
  --ink: #1e293b;
  --ink-soft: #475569;
  --bg: #f8fafc;
  --border: #e2e8f0;
  --radius: 16px;
  --shadow: 0 10px 30px -12px rgba(15, 23, 42, 0.15);
}

html { box-sizing: border-box; }
*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; text-rendering: optimizeLegibility; }

/* 导航 */
.nav-link {
  position: relative;
  white-space: nowrap;
  padding: 0.85rem 1rem;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--ink-soft);
  transition: color 0.25s ease;
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: 0;
  height: 3px;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--brand), #fb923c);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.3s ease;
}
.nav-link:hover, .nav-link.active { color: var(--brand-dark); }
.nav-link:hover::after, .nav-link.active::after { transform: scaleX(1); }

.header-nav-scroll::-webkit-scrollbar { display: none; }
.header-nav-scroll { -ms-overflow-style: none; scrollbar-width: none; }

/* 卡片 */
.card-lift {
  transition: transform 0.35s cubic-bezier(.22,.61,.36,1), box-shadow 0.35s ease, border-color 0.3s ease;
}
.card-lift:hover {
  transform: translateY(-6px);
  box-shadow: 0 22px 45px -18px rgba(15,23,42,0.22);
  border-color: rgba(249,115,22,0.35);
}
.img-zoom { overflow: hidden; }
.img-zoom img {
  transition: transform 0.55s cubic-bezier(.22,.61,.36,1);
}
.img-zoom:hover img { transform: scale(1.06); }

/* 标签 */
.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.28rem 0.75rem;
  border-radius: 99px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  background: var(--brand-light);
  color: var(--brand-dark);
  border: 1px solid rgba(249,115,22,0.2);
}

/* 按钮 */
.btn-focus:focus {
  outline: none;
  box-shadow: 0 0 0 4px rgba(249,115,22,0.25);
}

/* FAQ */
.faq-item { transition: background 0.3s ease, border-color 0.3s ease; }
.faq-item.open { background: #fff; border-color: rgba(249,115,22,0.3); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s cubic-bezier(.22,.61,.36,1), padding 0.3s ease, opacity 0.4s ease;
  opacity: 0;
}
.faq-item.open .faq-answer { max-height: 400px; opacity: 1; }
.faq-item.open .faq-icon { transform: rotate(45deg); color: var(--brand-dark); }
.faq-icon { transition: transform 0.3s ease, color 0.3s ease; }

/* Hero overlay */
.hero-overlay::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, rgba(15,23,42,0.92) 15%, rgba(15,23,42,0.65) 55%, rgba(15,23,42,0.35) 100%),
    linear-gradient(180deg, rgba(15,23,42,0.3) 0%, transparent 60%);
  z-index: 1;
}
.hero-overlay .hero-content { position: relative; z-index: 2; }

/* 数据条 */
.stat-divider + .stat-divider { border-left: 1px solid var(--border); }
@media (max-width: 640px) {
  .stat-divider + .stat-divider { border-left: none; }
}

/* 实线分隔 */
.section-line { height: 1px; background: linear-gradient(90deg, transparent, var(--border) 20%, var(--border) 80%, transparent); }

/* 动画 */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-fade-up { animation: fadeUp 0.8s ease both; }
.animation-delay-100 { animation-delay: 0.1s; }
.animation-delay-200 { animation-delay: 0.2s; }
.animation-delay-300 { animation-delay: 0.3s; }

/* 页面内部锚点 */
.section-anchor { scroll-margin-top: 130px; }

/* roulang page: category3 */
:root {
      --primary: #2563eb;
      --primary-deep: #1d4ed8;
      --primary-light: #eff6ff;
      --accent: #f59e0b;
      --ink: #0b1220;
      --text: #1e293b;
      --muted: #64748b;
      --surface: #f6f8fc;
      --white: #ffffff;
      --line: #e2e8f0;
      --radius: 18px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --shadow: 0 12px 36px rgba(15, 23, 42, .08);
      --shadow-lg: 0 24px 60px rgba(15, 23, 42, .12);
      --transition: .25s ease;
      --container: 1200px;
      --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: var(--font-sans);
      background: var(--surface);
      color: var(--text);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }

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

    a {
      color: inherit;
      text-decoration: none;
    }

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

    .container {
      max-width: var(--container);
      margin-inline: auto;
      padding-inline: 24px;
    }

    /* ===== Header ===== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      box-shadow: 0 6px 20px rgba(2, 10, 25, .06);
    }

    .header-top {
      background: #0b1628;
      color: #fff;
    }

    .header-top .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 64px;
    }

    .logo {
      display: inline-flex;
      align-items: center;
      gap: 10px;
    }

    .logo-badge {
      width: 42px;
      height: 42px;
      border-radius: 12px;
      background: linear-gradient(135deg, var(--primary), #4f9cf7);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 18px;
      box-shadow: 0 6px 16px rgba(37, 99, 235, .35);
      transition: transform var(--transition);
    }

    .logo:hover .logo-badge {
      transform: scale(1.05);
    }

    .logo-text {
      font-size: 22px;
      font-weight: 800;
      letter-spacing: .5px;
      color: #fff;
      line-height: 1.2;
    }

    .logo-sub {
      color: var(--accent);
      margin-left: 6px;
      font-weight: 700;
      font-size: 13px;
      letter-spacing: 3px;
    }

    .header-top-right {
      display: flex;
      align-items: center;
      gap: 16px;
      font-size: 14px;
    }

    .header-link {
      color: rgba(255, 255, 255, .82);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      transition: color var(--transition);
    }

    .header-link:hover {
      color: #fff;
    }

    .header-nav {
      background: #fff;
      border-bottom: 1px solid var(--line);
    }

    .header-nav .container {
      display: flex;
      align-items: center;
      justify-content: center;
      height: 56px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 36px;
      list-style: none;
      padding: 0;
      margin: 0;
    }

    .nav-link {
      position: relative;
      font-size: 15px;
      font-weight: 600;
      color: #334155;
      padding: 8px 2px;
      transition: color var(--transition);
    }

    .nav-link::after {
      content: "";
      position: absolute;
      left: 0;
      bottom: -2px;
      width: 0;
      height: 3px;
      border-radius: 20px;
      background: linear-gradient(90deg, var(--primary), #60a5fa);
      transition: width var(--transition);
    }

    .nav-link:hover,
    .nav-link.active {
      color: var(--primary);
    }

    .nav-link:hover::after,
    .nav-link.active::after {
      width: 100%;
    }

    .nav-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 22px;
      color: var(--ink);
      cursor: pointer;
    }

    /* ===== Buttons ===== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 24px;
      border-radius: 12px;
      font-size: 15px;
      font-weight: 700;
      line-height: 1;
      border: none;
      cursor: pointer;
      transition: all var(--transition);
    }

    .btn i {
      font-size: 14px;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary), #3b82f6);
      color: #fff;
      box-shadow: 0 10px 24px rgba(37, 99, 235, .25);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 14px 30px rgba(37, 99, 235, .32);
    }

    .btn-outline {
      background: #fff;
      color: var(--primary);
      border: 1.5px solid var(--primary);
    }

    .btn-outline:hover {
      background: var(--primary-light);
      transform: translateY(-2px);
    }

    .btn-light {
      background: #fff;
      color: var(--ink);
    }

    .btn-light:hover {
      transform: translateY(-2px);
      box-shadow: 0 14px 30px rgba(255, 255, 255, .25);
    }

    .btn-lg {
      padding: 16px 32px;
      font-size: 16px;
      border-radius: 14px;
    }

    .btn-sm {
      padding: 9px 16px;
      font-size: 13px;
      font-weight: 600;
    }

    /* ===== Page Hero ===== */
    .page-hero {
      position: relative;
      padding: 96px 0 90px;
      color: #fff;
      background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
    }

    .page-hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(120deg, rgba(4, 13, 28, .92), rgba(10, 25, 60, .74));
    }

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

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, .14);
      border: 1px solid rgba(255, 255, 255, .24);
      padding: 7px 18px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 1px;
      backdrop-filter: blur(6px);
    }

    .page-hero h1 {
      font-size: 48px;
      font-weight: 800;
      line-height: 1.2;
      margin: 22px 0 16px;
      letter-spacing: 1px;
      color: #fff;
    }

    .page-hero p {
      font-size: 18px;
      color: rgba(255, 255, 255, .78);
      max-width: 680px;
      line-height: 1.8;
    }

    .hero-crumb {
      margin-top: 28px;
      font-size: 14px;
      color: rgba(255, 255, 255, .68);
    }

    .hero-crumb a {
      color: #fff;
      opacity: .85;
      transition: opacity var(--transition);
    }

    .hero-crumb a:hover {
      opacity: 1;
    }

    /* ===== Sections ===== */
    .section {
      padding: 90px 0;
    }

    .section-white {
      background: #fff;
    }

    .section-head {
      max-width: 700px;
      margin: 0 auto 52px;
      text-align: center;
    }

    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--primary);
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 1px;
      background: var(--primary-light);
      padding: 6px 14px;
      border-radius: 999px;
      margin-bottom: 14px;
    }

    .section-head h2 {
      font-size: 36px;
      font-weight: 800;
      color: var(--ink);
      line-height: 1.25;
      letter-spacing: .4px;
      margin: 0;
    }

    .section-head p {
      margin-top: 14px;
      color: var(--muted);
      font-size: 16px;
      line-height: 1.8;
    }

    /* ===== Service Cards ===== */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .service-card {
      background: #fff;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      padding: 30px 26px;
      position: relative;
      overflow: hidden;
      transition: all var(--transition);
      box-shadow: 0 4px 14px rgba(15, 23, 42, .04);
    }

    .service-card::before {
      content: "";
      position: absolute;
      left: 0;
      top: 0;
      width: 100%;
      height: 4px;
      background: linear-gradient(90deg, var(--primary), #38bdf8);
      transform: scaleX(0);
      transform-origin: left;
      transition: transform .35s ease;
    }

    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow);
      border-color: #d7e5ff;
    }

    .service-card:hover::before {
      transform: scaleX(1);
    }

    .service-icon {
      width: 54px;
      height: 54px;
      border-radius: 16px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 20px;
    }

    .service-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--ink);
      margin: 0 0 10px;
    }

    .service-card p {
      font-size: 14px;
      color: var(--muted);
      margin: 0;
      line-height: 1.75;
    }

    /* ===== Article Cards ===== */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }

    .article-card {
      background: #fff;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: all var(--transition);
    }

    .article-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: #d7e5ff;
    }

    .article-media {
      position: relative;
      aspect-ratio: 16 / 9;
      overflow: hidden;
    }

    .article-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform .5s ease;
    }

    .article-card:hover .article-media img {
      transform: scale(1.05);
    }

    .article-badge {
      position: absolute;
      left: 16px;
      top: 16px;
      background: rgba(255, 255, 255, .92);
      color: var(--primary);
      font-size: 12px;
      font-weight: 700;
      padding: 5px 12px;
      border-radius: 999px;
      box-shadow: 0 4px 12px rgba(15, 23, 42, .12);
    }

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

    .article-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 13px;
      color: var(--muted);
      margin-bottom: 10px;
    }

    .article-body h3 {
      font-size: 20px;
      font-weight: 700;
      color: var(--ink);
      line-height: 1.4;
      margin: 0 0 10px;
    }

    .article-body p {
      font-size: 14px;
      color: var(--muted);
      line-height: 1.8;
      margin: 0 0 18px;
      flex: 1;
    }

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

    .article-more i {
      transition: transform var(--transition);
    }

    .article-more:hover {
      color: var(--primary-deep);
    }

    .article-more:hover i {
      transform: translateX(4px);
    }

    /* ===== Process ===== */
    .process-section {
      background: linear-gradient(135deg, #0d1b3e, #14294f), url('/assets/images/backpic/back-3.png') center/cover;
      background-blend-mode: overlay;
      color: #fff;
      position: relative;
      overflow: hidden;
    }

    .process-section .section-tag {
      background: rgba(255, 255, 255, .12);
      color: #fff;
    }

    .process-section .section-head h2 {
      color: #fff;
    }

    .process-section .section-head p {
      color: rgba(255, 255, 255, .72);
    }

    .process-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 28px;
    }

    .process-item {
      position: relative;
      background: rgba(255, 255, 255, .05);
      border: 1px solid rgba(255, 255, 255, .12);
      border-radius: var(--radius);
      padding: 30px 24px;
      backdrop-filter: blur(8px);
      transition: all var(--transition);
    }

    .process-item:hover {
      background: rgba(255, 255, 255, .1);
      transform: translateY(-4px);
    }

    .process-num {
      font-size: 42px;
      font-weight: 900;
      color: rgba(255, 255, 255, .18);
      line-height: 1;
      margin-bottom: 16px;
      letter-spacing: -1px;
    }

    .process-item h3 {
      font-size: 18px;
      font-weight: 700;
      color: #fff;
      margin: 0 0 10px;
    }

    .process-item p {
      font-size: 14px;
      color: rgba(255, 255, 255, .7);
      line-height: 1.8;
      margin: 0;
    }

    /* ===== Stats ===== */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .stat-box {
      text-align: center;
      background: #fff;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      padding: 32px 20px;
      box-shadow: 0 4px 14px rgba(15, 23, 42, .04);
      transition: all var(--transition);
    }

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

    .stat-num {
      font-size: 44px;
      font-weight: 900;
      color: var(--primary);
      line-height: 1.1;
    }

    .stat-label {
      font-size: 15px;
      color: var(--muted);
      margin-top: 10px;
      font-weight: 600;
    }

    /* ===== FAQ ===== */
    .faq-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    .faq-item {
      background: #fff;
      border: 1px solid var(--line);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: box-shadow var(--transition), border-color var(--transition);
    }

    .faq-item[open] {
      box-shadow: var(--shadow);
      border-color: #d7e5ff;
    }

    .faq-item summary {
      cursor: pointer;
      list-style: none;
      padding: 20px 22px;
      font-weight: 700;
      font-size: 15px;
      color: var(--ink);
      display: flex;
      align-items: center;
      gap: 12px;
      transition: color var(--transition);
      user-select: none;
    }

    .faq-item summary::-webkit-details-marker {
      display: none;
    }

    .faq-item summary::before {
      content: "Q";
      width: 28px;
      height: 28px;
      flex: 0 0 28px;
      border-radius: 8px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 13px;
      font-weight: 800;
    }

    .faq-item summary::after {
      content: "\f078";
      font-family: "Font Awesome 6 Free";
      font-weight: 900;
      font-size: 12px;
      color: var(--muted);
      margin-left: auto;
      transition: transform var(--transition);
    }

    .faq-item[open] summary::after {
      transform: rotate(180deg);
    }

    .faq-answer {
      padding: 0 22px 22px 62px;
      font-size: 14px;
      color: var(--muted);
      line-height: 1.85;
    }

    .faq-answer a {
      color: var(--primary);
      font-weight: 600;
    }

    /* ===== CTA ===== */
    .cta-box {
      background: linear-gradient(120deg, #10224a, #1e40af);
      border-radius: 28px;
      padding: 60px;
      color: #fff;
      position: relative;
      overflow: hidden;
      box-shadow: var(--shadow-lg);
    }

    .cta-box::before {
      content: "";
      position: absolute;
      right: -80px;
      top: -80px;
      width: 240px;
      height: 240px;
      background: rgba(255, 255, 255, .08);
      border-radius: 50%;
    }

    .cta-box::after {
      content: "";
      position: absolute;
      left: 30%;
      bottom: -120px;
      width: 260px;
      height: 260px;
      background: rgba(255, 255, 255, .04);
      border-radius: 50%;
    }

    .cta-inner {
      position: relative;
      z-index: 2;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 36px;
      flex-wrap: wrap;
    }

    .cta-copy h2 {
      font-size: 34px;
      font-weight: 800;
      line-height: 1.3;
      margin: 0 0 12px;
      color: #fff;
    }

    .cta-copy p {
      font-size: 16px;
      color: rgba(255, 255, 255, .78);
      margin: 0;
      max-width: 560px;
      line-height: 1.8;
    }

    .cta-actions {
      display: flex;
      align-items: center;
      gap: 14px;
      flex-wrap: wrap;
    }

    /* ===== Footer ===== */
    .site-footer {
      background: #0b1628;
      color: #a7b4c7;
      padding: 72px 0 24px;
      font-size: 14px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1.2fr;
      gap: 48px;
      margin-bottom: 48px;
    }

    .footer-brand p {
      margin: 18px 0 22px;
      font-size: 14px;
      line-height: 1.85;
      color: #8b9ab1;
      max-width: 360px;
    }

    .footer-brand .logo-text {
      color: #fff;
    }

    .social {
      display: flex;
      gap: 10px;
    }

    .social a {
      width: 38px;
      height: 38px;
      border-radius: 10px;
      background: rgba(255, 255, 255, .06);
      border: 1px solid rgba(255, 255, 255, .08);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #cbd5e1;
      font-size: 15px;
      transition: all var(--transition);
    }

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

    .footer-col h4 {
      color: #fff;
      font-size: 16px;
      font-weight: 700;
      margin: 0 0 18px;
    }

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

    .footer-col ul li {
      margin-bottom: 10px;
    }

    .footer-col ul li a {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: #8b9ab1;
      transition: color var(--transition), transform var(--transition);
    }

    .footer-col ul li a i {
      font-size: 12px;
      color: var(--primary);
    }

    .footer-col ul li a:hover {
      color: #fff;
      transform: translateX(3px);
    }

    .footer-contact p {
      display: flex;
      align-items: center;
      gap: 10px;
      margin: 0 0 12px;
      color: #8b9ab1;
      font-size: 14px;
    }

    .footer-contact p i {
      width: 20px;
      color: var(--primary);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, .08);
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: #6b7b90;
    }

    .footer-bottom p {
      margin: 0;
    }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
      .service-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .articles-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
      }

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

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

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

    @media (max-width: 768px) {
      .section {
        padding: 64px 0;
      }

      .page-hero {
        padding: 68px 0 64px;
      }

      .page-hero h1 {
        font-size: 34px;
      }

      .page-hero p {
        font-size: 16px;
      }

      .section-head h2 {
        font-size: 28px;
      }

      .section-head {
        margin-bottom: 36px;
      }

      .header-top .container {
        height: 56px;
      }

      .header-link span {
        display: none;
      }

      .header-link .fa-regular,
      .header-link .fa-solid {
        font-size: 16px;
      }

      .header-nav .container {
        justify-content: flex-start;
        overflow-x: auto;
        scrollbar-width: none;
      }

      .header-nav .container::-webkit-scrollbar {
        display: none;
      }

      .nav-links {
        gap: 26px;
        min-width: max-content;
        padding-inline: 8px;
      }

      .nav-link {
        white-space: nowrap;
        font-size: 14px;
        padding-block: 12px;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 36px;
      }

      .cta-box {
        padding: 36px 28px;
        border-radius: 20px;
      }

      .cta-copy h2 {
        font-size: 26px;
      }
    }

    @media (max-width: 520px) {
      .container {
        padding-inline: 18px;
      }

      .service-grid,
      .articles-grid,
      .process-grid,
      .stats-grid,
      .faq-grid {
        grid-template-columns: 1fr;
      }

      .page-hero {
        padding: 56px 0 52px;
      }

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

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

      .section-head h2 {
        font-size: 24px;
      }

      .logo-text {
        font-size: 18px;
      }

      .logo-sub {
        font-size: 11px;
      }

      .logo-badge {
        width: 36px;
        height: 36px;
        border-radius: 10px;
      }

      .cta-inner {
        flex-direction: column;
        align-items: flex-start;
      }

      .stat-num {
        font-size: 34px;
      }

      .faq-answer {
        padding-left: 22px;
      }
    }

    a:focus-visible,
    button:focus-visible,
    summary:focus-visible {
      outline: 3px solid rgba(37, 99, 235, .45);
      outline-offset: 2px;
      border-radius: 8px;
    }