/* roulang page: index */
:root {
    --brand: #19E3A8;
    --brand-hover: #0FC58C;
    --brand-active: #0EA97A;
    --accent: #7C5CFF;
    --bg: #0B0F14;
    --card: #151C24;
    --hover-bg: #1A2330;
    --text: #EAF0F6;
    --text-secondary: #8B98AA;
    --text-disabled: #4A5568;
    --border: rgba(255, 255, 255, 0.08);
    --radius-lg: 16px;
    --radius-md: 10px;
    --radius-sm: 8px;
    --shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-hover: 0 0 0 1px var(--brand), 0 12px 32px rgba(25, 227, 168, 0.1);
  }

  html { scroll-behavior: smooth; }

  body {
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
  }

  .container-custom {
    max-width: 1280px;
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
  }

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

  /* 顶部导航 */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(11, 15, 20, 0.88);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
  }

  .header-inner {
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
  }

  .logo-wrap {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text);
    white-space: nowrap;
  }

  .logo-icon {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: rgba(25, 227, 168, 0.12);
    color: var(--brand);
  }

  .log-text {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -0.01em;
  }

  .nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
  }

  .nav-link {
    position: relative;
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
    padding: 8px 2px;
    text-decoration: none;
    transition: color 0.2s ease;
  }

  .nav-link:hover { color: var(--text); }

  .nav-link.active { color: var(--text); }

  .nav-link.active::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: -2px;
    height: 2px;
    border-radius: 2px;
    background: var(--brand);
    box-shadow: 0 0 8px rgba(25, 227, 168, 0.7);
  }

  .header-cta-btn {
    margin-left: 8px;
    flex-shrink: 0;
  }

  .mobile-menu-btn {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text);
    cursor: pointer;
  }

  /* 移动端下拉菜单 */
  .mobile-dropdown {
    display: none;
    background: var(--card);
    border-bottom: 1px solid var(--border);
    padding: 12px 16px;
  }

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

  .mobile-dropdown a {
    display: block;
    padding: 12px 8px;
    color: var(--text);
    font-size: 15px;
    font-weight: 500;
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: background 0.2s ease;
  }

  .mobile-dropdown a:hover { background: var(--hover-bg); }

  /* 底部 Tab 导航 */
  .mobile-tabbar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 60;
    height: calc(60px + env(safe-area-inset-bottom, 0px));
    padding-bottom: env(safe-area-inset-bottom, 0px);
    background: rgba(11, 15, 20, 0.96);
    backdrop-filter: blur(14px);
    border-top: 1px solid var(--border);
  }

  .tabbar-inner {
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-around;
  }

  .tab-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    min-width: 72px;
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 500;
    text-decoration: none;
    transition: color 0.2s ease;
  }

  .tab-item svg { width: 22px; height: 22px; }

  .tab-item.active { color: var(--brand); }

  .tab-item.active svg { filter: drop-shadow(0 0 6px rgba(25, 227, 168, 0.6)); }

  @media (max-width: 767px) {
    .desktop-nav, .header-cta-btn { display: none !important; }
    .mobile-tabbar { display: block; }
    main { padding-bottom: 76px; }
  }

  @media (min-width: 768px) {
    .mobile-menu-btn { display: none !important; }
    .mobile-dropdown { display: none !important; }
  }

  /* 按钮体系 */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 700;
    line-height: 1;
    text-decoration: none;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease;
    outline: none;
    white-space: nowrap;
  }

  .btn:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }

  .btn-primary {
    background: var(--brand);
    color: #0B0F14;
    border-color: var(--brand);
  }

  .btn-primary:hover {
    background: var(--brand-hover);
    border-color: var(--brand-hover);
    box-shadow: 0 0 20px rgba(25, 227, 168, 0.4);
  }

  .btn-primary:active {
    background: var(--brand-active);
    border-color: var(--brand-active);
    transform: translateY(1px);
  }

  .btn-outline {
    background: transparent;
    color: var(--text);
    border-color: rgba(255, 255, 255, 0.2);
  }

  .btn-outline:hover {
    border-color: var(--brand);
    color: var(--brand);
    box-shadow: 0 0 12px rgba(25, 227, 168, 0.15);
  }

  .btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
    padding: 8px 12px;
  }

  .btn-ghost:hover { color: var(--brand); }

  .btn-lg { padding: 15px 32px; font-size: 16px; border-radius: 12px; }

  .btn-xl { padding: 18px 42px; font-size: 17px; border-radius: 14px; }

  /* Hero */
  .hero {
    position: relative;
    overflow: hidden;
    background: var(--bg);
    isolation: isolate;
  }

  .hero-bg {
    position: absolute;
    inset: 0;
    z-index: -1;
    background-image: url('/assets/images/backpic/back-1.webp');
    background-size: cover;
    background-position: center;
    opacity: 0.12;
  }

  .hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
      linear-gradient(rgba(25, 227, 168, 0.035) 1px, transparent 1px),
      linear-gradient(90deg, rgba(25, 227, 168, 0.035) 1px, transparent 1px);
    background-size: 44px 44px;
  }

  .hero-glow {
    position: absolute;
    z-index: -1;
    width: 480px;
    height: 480px;
    right: -120px;
    top: -80px;
    background: radial-gradient(circle, rgba(25, 227, 168, 0.16), transparent 65%);
    pointer-events: none;
  }

  .hero-visual {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
  }

  .hero-visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    min-height: 320px;
  }

  .float-badge {
    position: absolute;
    top: 20px;
    left: 20px;
    background: rgba(21, 28, 36, 0.92);
    backdrop-filter: blur(8px);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 12px 16px;
    text-align: left;
    box-shadow: var(--shadow);
  }

  .float-badge.bottom { top: auto; bottom: 20px; left: auto; right: 20px; }

  .float-num {
    font-size: 20px;
    font-weight: 800;
    color: var(--brand);
    line-height: 1.2;
    font-variant-numeric: tabular-nums;
  }

  .float-label {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 2px;
  }

  /* 信息区块通用 */
  .section { padding: 96px 0; }

  .section-alt { background: rgba(21, 28, 36, 0.4); }

  .section-head { margin-bottom: 48px; }

  .section-head h2 {
    font-size: 32px;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.25;
    margin: 0;
  }

  .section-head p {
    color: var(--text-secondary);
    margin-top: 12px;
    font-size: 15px;
    max-width: 560px;
  }

  .section-head .head-link { margin-left: auto; flex-shrink: 0; }

  @media (max-width: 767px) {
    .section { padding: 56px 0; }
    .section-head { margin-bottom: 32px; }
    .section-head h2 { font-size: 24px; }
  }

  /* 资讯卡片 */
  .news-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .news-card {
    display: flex;
    gap: 16px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 16px;
    text-decoration: none;
    transition: all 0.25s ease;
  }

  .news-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(25, 227, 168, 0.4);
  }

  .news-thumb {
    width: 112px;
    height: 100px;
    flex-shrink: 0;
    border-radius: 12px;
    overflow: hidden;
  }

  .news-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .news-body {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
  }

  .news-title {
    font-size: 16px;
    font-weight: 700;
    line-height: 1.45;
    color: var(--text);
    margin: 0 0 6px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .news-card:hover .news-title { color: var(--brand); }

  .news-excerpt {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 10px;
  }

  .news-meta {
    margin-top: auto;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 12px;
    color: var(--text-secondary);
  }

  .news-link {
    margin-left: auto;
    color: var(--brand);
    font-weight: 600;
    opacity: 0.85;
  }

  .news-card:hover .news-link { opacity: 1; }

  .empty-state {
    grid-column: 1 / -1;
    background: var(--card);
    border: 1px dashed rgba(255, 255, 255, 0.14);
    border-radius: var(--radius-lg);
    padding: 48px 24px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 15px;
  }

  @media (max-width: 1023px) {
    .news-grid { grid-template-columns: 1fr; }
  }

  @media (max-width: 520px) {
    .news-thumb { width: 96px; height: 90px; }
    .news-title { font-size: 15px; }
    .news-excerpt { display: none; }
  }

  /* 徽章 */
  .badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 999px;
    background: rgba(25, 227, 168, 0.12);
    color: var(--brand);
    font-size: 12px;
    font-weight: 600;
    line-height: 1.4;
  }

  .badge-outline {
    background: transparent;
    border: 1px solid rgba(25, 227, 168, 0.4);
  }

  .badge-accent {
    background: rgba(124, 92, 255, 0.15);
    color: #A78BFF;
  }

  .badge-warning {
    background: rgba(245, 166, 35, 0.15);
    color: #F5A623;
  }

  /* 会员权益对比表 */
  .price-table-wrap {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
  }

  .price-table {
    width: 100%;
    min-width: 880px;
    border-collapse: collapse;
    background: var(--card);
    font-size: 14px;
  }

  .price-table th,
  .price-table td {
    padding: 16px 20px;
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    white-space: nowrap;
  }

  .price-table thead th {
    background: #121920;
    font-weight: 700;
    color: var(--text);
    padding-top: 20px;
    padding-bottom: 20px;
    font-size: 15px;
  }

  .price-table th:first-child,
  .price-table td:first-child {
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    background: #121920;
    min-width: 140px;
    position: sticky;
    left: 0;
    z-index: 1;
  }

  .price-table td:first-child {
    background: #11171e;
    font-weight: 500;
  }

  .price-table .col-gold {
    background: rgba(25, 227, 168, 0.08);
    box-shadow: inset 0 2px 0 var(--brand);
  }

  .price-table .col-gold thead,
  .price-table th.col-gold {
    background: rgba(25, 227, 168, 0.14);
    color: var(--brand);
  }

  .price-table .rec-badge {
    display: inline-block;
    background: var(--brand);
    color: #0B0F14;
    font-size: 11px;
    font-weight: 800;
    padding: 3px 10px;
    border-radius: 999px;
    margin-left: 8px;
    vertical-align: middle;
  }

  .price-num {
    font-size: 26px;
    font-weight: 800;
    color: var(--text);
    line-height: 1.2;
  }

  .price-label { font-size: 13px; color: var(--text-secondary); margin-left: 4px; }

  .price-table .disabled { color: var(--text-disabled); }

  .mobile-price-cards {
    display: none;
    gap: 16px;
    overflow-x: auto;
    padding-bottom: 8px;
    scroll-snap-type: x mandatory;
  }

  .mobile-price-card {
    min-width: 240px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    scroll-snap-align: start;
    flex-shrink: 0;
  }

  .mobile-price-card.recommended {
    border-color: var(--brand);
    box-shadow: 0 0 0 4px rgba(25, 227, 168, 0.12);
  }

  .mobile-price-card .p-tier {
    font-size: 16px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .mobile-price-card .p-price { font-size: 30px; font-weight: 800; color: var(--brand); margin: 12px 0; }

  .mobile-price-card .p-price small { font-size: 14px; font-weight: 500; color: var(--text-secondary); }

  .mobile-price-card ul { list-style: none; padding: 0; margin: 0; }

  .mobile-price-card li {
    padding: 6px 0;
    font-size: 14px;
    color: var(--text-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.04);
  }

  .mobile-price-card li:first-child { border-top: none; }

  @media (max-width: 767px) {
    .price-table-wrap { display: none; }
    .mobile-price-cards { display: flex; }
  }

  /* 等级亮点阶梯 */
  .tier-track {
    position: relative;
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 24px;
    justify-content: space-between;
    padding-top: 40px;
  }

  .tier-track::before {
    content: '';
    position: absolute;
    top: 0;
    left: 8%;
    right: 8%;
    height: 2px;
    border-top: 2px dashed rgba(25, 227, 168, 0.45);
    transform: rotate(2deg);
    pointer-events: none;
  }

  .tier-node {
    width: 22%;
    min-width: 180px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px 20px;
    text-align: left;
    position: relative;
    transition: all 0.25s ease;
  }

  .tier-node:nth-child(2) { margin-top: 36px; }
  .tier-node:nth-child(3) { margin-top: 72px; }
  .tier-node:nth-child(4) { margin-top: 108px; }

  .tier-node.recommended {
    border-color: var(--brand);
    box-shadow: 0 0 0 5px rgba(25, 227, 168, 0.1), var(--shadow);
  }

  .tier-node.recommended::after {
    content: '';
    position: absolute;
    top: -10px;
    right: -10px;
    width: 24px;
    height: 24px;
    background: var(--brand);
    border-radius: 50%;
    box-shadow: 0 0 16px rgba(25, 227, 168, 0.7);
  }

  .tier-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(25, 227, 168, 0.12);
    color: var(--brand);
    margin-bottom: 16px;
  }

  .tier-name { font-size: 18px; font-weight: 800; margin: 0 0 6px; }

  .tier-name em {
    font-style: normal;
    color: var(--brand);
    font-size: 13px;
    font-weight: 600;
    margin-left: 6px;
  }

  .tier-benefit { font-size: 14px; color: var(--text-secondary); line-height: 1.6; min-height: 44px; }

  .tier-price { font-size: 22px; font-weight: 800; color: var(--brand); margin-top: 12px; }

  .tier-price small { font-size: 13px; font-weight: 500; color: var(--text-secondary); }

  @media (max-width: 1023px) {
    .tier-track::before { display: none; }
    .tier-node { width: 48%; }
    .tier-node:nth-child(2) { margin-top: 0; }
    .tier-node:nth-child(3) { margin-top: 0; }
    .tier-node:nth-child(4) { margin-top: 0; }
  }

  @media (max-width: 767px) {
    .tier-track { gap: 16px; }
    .tier-node { width: 100%; }
  }

  /* 专属内容预览 */
  .exclusive-grid { display: grid; grid-template-columns: 7fr 5fr; gap: 40px; align-items: center; }

  .exclusive-video {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
  }

  .exclusive-video img { width: 100%; height: auto; object-fit: cover; min-height: 340px; }

  .play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 76px;
    height: 76px;
    border-radius: 50%;
    background: var(--brand);
    color: #0B0F14;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    box-shadow: 0 0 32px rgba(25, 227, 168, 0.5);
    cursor: pointer;
  }

  .exclusive-video:hover .play-btn {
    transform: translate(-50%, -50%) scale(1.1);
    box-shadow: 0 0 48px rgba(25, 227, 168, 0.7);
  }

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

  .ex-item {
    display: flex;
    align-items: center;
    gap: 14px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 12px;
    text-decoration: none;
    transition: all 0.2s ease;
  }

  .ex-item:hover { transform: translateX(-4px); border-color: rgba(25, 227, 168, 0.4); box-shadow: var(--shadow-hover); }

  .ex-item img {
    width: 72px;
    height: 54px;
    border-radius: 10px;
    object-fit: cover;
    flex-shrink: 0;
  }

  .ex-item-text { flex: 1; min-width: 0; font-size: 15px; font-weight: 600; color: var(--text); line-height: 1.4; }

  .duration {
    flex-shrink: 0;
    background: rgba(11, 15, 20, 0.8);
    color: var(--brand);
    font-size: 12px;
    font-weight: 700;
    padding: 4px 8px;
    border-radius: 6px;
    border: 1px solid rgba(25, 227, 168, 0.2);
  }

  @media (max-width: 1023px) {
    .exclusive-grid { grid-template-columns: 1fr; }
  }

  /* FAQ */
  .faq-list { max-width: 760px; margin: 0 auto; }

  .faq-item {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    margin-bottom: 12px;
    overflow: hidden;
    transition: border-color 0.2s ease;
  }

  .faq-item.open { border-color: rgba(25, 227, 168, 0.4); }

  .faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: transparent;
    border: none;
    padding: 20px 20px 20px 24px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    cursor: pointer;
    text-align: left;
    transition: color 0.2s ease;
    position: relative;
  }

  .faq-item.open .faq-question { color: var(--brand); }

  .faq-item.open .faq-question::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--brand);
  }

  .faq-question svg {
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    transition: transform 0.25s ease;
    color: var(--text-secondary);
  }

  .faq-item.open .faq-question svg { transform: rotate(45deg); color: var(--brand); }

  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.2s ease;
  }

  .faq-answer-inner {
    padding: 0 24px 20px;
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.75;
  }

  .faq-item.open .faq-answer { max-height: 300px; }

  .faq-bottom-link {
    text-align: center;
    margin-top: 28px;
  }

  /* CTA 横幅 */
  .cta-banner {
    position: relative;
    overflow: hidden;
    background: #111820;
    border-radius: 24px;
    border: 1px solid var(--border);
    padding: 60px 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    flex-wrap: wrap;
  }

  .cta-banner::before {
    content: '';
    position: absolute;
    top: -40%;
    left: 20%;
    width: 380px;
    height: 160%;
    background: rgba(25, 227, 168, 0.1);
    transform: rotate(40deg);
    pointer-events: none;
  }

  .cta-title { font-size: 30px; font-weight: 800; line-height: 1.3; margin: 0 0 10px; }

  .cta-desc { color: var(--text-secondary); font-size: 15px; max-width: 480px; }

  .cta-banner .btn { position: relative; z-index: 2; }

  @media (max-width: 767px) {
    .cta-banner { padding: 40px 24px; flex-direction: column; align-items: flex-start; }
    .cta-title { font-size: 24px; }
  }

  /* 页脚 */
  .site-footer { border-top: 1px solid var(--border); background: #0D1218; padding-top: 64px; }

  .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 48px;
  }

  .footer-brand-name {
    font-size: 22px;
    font-weight: 800;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .footer-desc { color: var(--text-secondary); font-size: 14px; max-width: 320px; margin-top: 14px; line-height: 1.7; }

  .footer-col h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 16px;
  }

  .footer-col a {
    display: block;
    color: var(--text-secondary);
    font-size: 14px;
    padding: 5px 0;
    text-decoration: none;
    transition: color 0.2s ease;
  }

  .footer-col a:hover { color: var(--text); }

  .footer-bottom {
    border-top: 1px solid var(--border);
    padding: 20px 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 13px;
    color: var(--text-disabled);
  }

  .footer-bottom a { color: var(--text-disabled); text-decoration: none; transition: color 0.2s; }

  .footer-bottom a:hover { color: var(--text-secondary); }

  @media (max-width: 1023px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
  }

  @media (max-width: 520px) {
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  }

  /* 通用 focus 可访问性 */
  a:focus-visible,
  button:focus-visible {
    outline: 2px solid var(--brand);
    outline-offset: 2px;
    border-radius: 4px;
  }

  /* 装饰分隔 */
  .divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(25, 227, 168, 0.3), transparent);
  }

/* roulang page: category1 */
:root {
            --brand: #19E3A8;
            --brand-hover: #0FC58C;
            --brand-active: #0EA97A;
            --accent: #7C5CFF;
            --bg-deep: #0B0F14;
            --bg-panel: #151C24;
            --bg-hover: #1A2330;
            --text-main: #EAF0F6;
            --text-sub: #8B98AA;
            --text-disabled: #4A5568;
            --border-color: rgba(255, 255, 255, 0.08);
            --radius-lg: 16px;
            --radius-md: 10px;
            --radius-sm: 8px;
            --shadow-default: 0 8px 24px rgba(0, 0, 0, 0.4);
            --shadow-hover: 0 0 0 1px rgba(25, 227, 168, 0.4), 0 12px 32px rgba(25, 227, 168, 0.1);
            --container-w: 1280px;
            --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-deep);
            color: var(--text-main);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            min-height: 100vh;
        }

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

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }

        .container-custom {
            max-width: var(--container-w);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .text-brand {
            color: var(--brand) !important;
        }

        .text-sub {
            color: var(--text-sub);
        }

        .bg-panel {
            background: var(--bg-panel);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 700;
            font-size: 15px;
            line-height: 1;
            padding: 14px 24px;
            border-radius: var(--radius-md);
            cursor: pointer;
            transition: all .2s ease;
            border: 1px solid transparent;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--brand);
            color: var(--bg-deep);
            box-shadow: 0 0 0 0 rgba(25, 227, 168, 0);
        }

        .btn-primary:hover {
            background: var(--brand-hover);
            box-shadow: 0 0 24px rgba(25, 227, 168, 0.35);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            background: var(--brand-active);
            transform: translateY(0);
            box-shadow: 0 0 12px rgba(25, 227, 168, 0.2);
        }

        .btn-secondary {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.18);
            color: var(--text-main);
        }

        .btn-secondary:hover {
            border-color: var(--brand);
            color: var(--brand);
            box-shadow: 0 0 16px rgba(25, 227, 168, 0.12);
        }

        .btn-lg {
            padding: 18px 36px;
            font-size: 17px;
            border-radius: 12px;
        }

        .btn-text {
            background: transparent;
            color: var(--text-sub);
            padding: 8px 12px;
            font-weight: 600;
        }

        .btn-text:hover {
            color: var(--brand);
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(25, 227, 168, 0.1);
            color: var(--brand);
            border: 1px solid rgba(25, 227, 168, 0.2);
        }

        .badge-accent {
            background: rgba(124, 92, 255, 0.12);
            color: var(--accent);
            border-color: rgba(124, 92, 255, 0.25);
        }

        .badge-gray {
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-sub);
            border-color: rgba(255, 255, 255, 0.08);
        }

        .section-padding {
            padding: 96px 0;
        }

        .section-title {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-sub);
            max-width: 640px;
            line-height: 1.7;
        }

        :focus-visible {
            outline: 2px solid var(--brand);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(11, 15, 20, 0.85);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-color);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
            gap: 20px;
        }

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

        .logo-icon {
            width: 34px;
            height: 34px;
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: rgba(25, 227, 168, 0.12);
            color: var(--brand);
            border: 1px solid rgba(25, 227, 168, 0.25);
            flex-shrink: 0;
        }

        .log-text {
            font-size: 22px;
            font-weight: 800;
            letter-spacing: -0.01em;
            color: var(--text-main);
        }

        .desktop-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-links .nav-link {
            position: relative;
            display: inline-flex;
            align-items: center;
            padding: 10px 16px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-sub);
            border-radius: 8px;
            transition: color .2s ease, background .2s ease;
        }

        .nav-links .nav-link:hover {
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.04);
        }

        .nav-links .nav-link.active {
            color: var(--brand);
        }

        .nav-links .nav-link.active::after {
            content: "";
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 2px;
            height: 2px;
            background: var(--brand);
            border-radius: 2px;
            box-shadow: 0 0 8px rgba(25, 227, 168, 0.5);
        }

        .header-cta-btn {
            padding: 10px 20px;
            font-size: 14px;
            flex-shrink: 0;
        }

        .mobile-menu-btn {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: var(--text-main);
            border: 1px solid var(--border-color);
            cursor: pointer;
        }

        .mobile-menu-btn:hover {
            border-color: var(--brand);
            color: var(--brand);
        }

        .mobile-dropdown {
            display: none;
            background: var(--bg-deep);
            border-top: 1px solid var(--border-color);
            padding: 12px 16px 16px;
        }

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

        .mobile-dropdown a {
            display: block;
            padding: 12px 16px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-sub);
        }

        .mobile-dropdown a.active {
            color: var(--brand);
            background: rgba(25, 227, 168, 0.08);
        }

        .mobile-dropdown a:hover {
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-main);
        }

        /* ===== Mobile Bottom Tab ===== */
        .mobile-tabbar {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 200;
            background: rgba(11, 15, 20, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-top: 1px solid var(--border-color);
            height: calc(60px + env(safe-area-inset-bottom));
            padding-bottom: env(safe-area-inset-bottom);
            align-items: center;
            justify-content: space-around;
        }

        .tabbar-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 3px;
            flex: 1;
            height: 100%;
            color: var(--text-disabled);
            font-size: 11px;
            font-weight: 600;
            transition: color .2s ease;
        }

        .tabbar-item svg {
            width: 20px;
            height: 20px;
            stroke-width: 2;
            transition: all .2s ease;
        }

        .tabbar-item.active {
            color: var(--brand);
        }

        .tabbar-item.active svg {
            filter: drop-shadow(0 0 6px rgba(25, 227, 168, 0.5));
        }

        /* ===== Page Hero Banner ===== */
        .page-banner {
            position: relative;
            padding: 80px 0 64px;
            background: linear-gradient(135deg, #121A24 0%, #0B0F14 60%);
            border-bottom: 1px solid var(--border-color);
            overflow: hidden;
        }

        .page-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
            background-size: 48px 48px;
            pointer-events: none;
        }

        .page-banner::after {
            content: "";
            position: absolute;
            top: -120px;
            right: -80px;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(25, 227, 168, 0.14) 0%, transparent 70%);
            pointer-events: none;
        }

        .page-banner .banner-content {
            position: relative;
            z-index: 2;
            display: flex;
            flex-direction: column;
            gap: 16px;
            max-width: 720px;
        }

        .banner-breadcrumb {
            font-size: 13px;
            color: var(--text-sub);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .banner-breadcrumb a {
            color: var(--text-sub);
        }

        .banner-breadcrumb a:hover {
            color: var(--brand);
        }

        .banner-breadcrumb span {
            color: var(--text-disabled);
        }

        .page-banner h1 {
            font-size: 48px;
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
            color: var(--text-main);
        }

        .page-banner .banner-desc {
            font-size: 18px;
            color: var(--text-sub);
            line-height: 1.7;
            max-width: 620px;
        }

        .banner-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-top: 8px;
        }

        /* ===== News Cards Grid ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .news-card {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
            display: flex;
            flex-direction: column;
        }

        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(25, 227, 168, 0.25);
        }

        .news-card .card-img {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
        }

        .news-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }

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

        .news-card .card-img .badge {
            position: absolute;
            top: 12px;
            left: 12px;
            backdrop-filter: blur(6px);
            background: rgba(11, 15, 20, 0.7);
        }

        .news-card .card-body {
            padding: 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
            gap: 8px;
        }

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

        .news-card .card-title {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.4;
            color: var(--text-main);
            transition: color .2s ease;
        }

        .news-card .card-title:hover {
            color: var(--brand);
        }

        .news-card .card-excerpt {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card .card-link {
            margin-top: auto;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--brand);
            padding-top: 8px;
        }

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

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

        /* ===== Stats ===== */
        .stats-section {
            background: linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-panel) 100%);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

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

        .stat-item {
            text-align: center;
            padding: 32px 16px;
            border-radius: var(--radius-lg);
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid var(--border-color);
            transition: border-color .2s ease, transform .2s ease;
        }

        .stat-item:hover {
            border-color: rgba(25, 227, 168, 0.25);
            transform: translateY(-2px);
        }

        .stat-number {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.1;
            color: var(--brand);
            font-variant-numeric: tabular-nums;
            letter-spacing: -0.02em;
        }

        .stat-label {
            margin-top: 8px;
            font-size: 14px;
            color: var(--text-sub);
            font-weight: 500;
        }

        /* ===== Feature Split ===== */
        .feature-split {
            display: flex;
            align-items: center;
            gap: 64px;
        }

        .feature-media {
            flex: 1 1 48%;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-default);
            position: relative;
        }

        .feature-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 320px;
        }

        .feature-list {
            flex: 1 1 52%;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .feature-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            padding: 20px;
            border-radius: var(--radius-lg);
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            transition: border-color .2s ease, transform .2s ease, box-shadow .2s ease;
        }

        .feature-item:hover {
            border-color: rgba(25, 227, 168, 0.2);
            transform: translateX(4px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
        }

        .feature-icon {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(25, 227, 168, 0.1);
            color: var(--brand);
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(25, 227, 168, 0.15);
        }

        .feature-item h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 4px;
            color: var(--text-main);
        }

        .feature-item p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.6;
        }

        /* ===== Schedule Timeline ===== */
        .schedule-wrap {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 32px;
        }

        .schedule-item {
            display: flex;
            align-items: center;
            gap: 24px;
            padding: 20px 0;
            border-bottom: 1px solid var(--border-color);
            transition: padding-left .2s ease, background .2s ease;
            border-radius: 8px;
        }

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

        .schedule-item:hover {
            padding-left: 8px;
            background: rgba(255, 255, 255, 0.02);
        }

        .schedule-date {
            width: 92px;
            flex-shrink: 0;
            text-align: center;
            padding: 10px 12px;
            background: rgba(25, 227, 168, 0.06);
            border: 1px solid rgba(25, 227, 168, 0.12);
            border-radius: 12px;
            font-weight: 700;
            color: var(--brand);
            font-size: 14px;
            line-height: 1.4;
        }

        .schedule-info {
            flex: 1;
            min-width: 0;
        }

        .schedule-info h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 2px;
        }

        .schedule-info p {
            font-size: 13px;
            color: var(--text-sub);
        }

        .schedule-status {
            flex-shrink: 0;
            font-size: 13px;
            color: var(--brand);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .schedule-status::before {
            content: "";
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--brand);
            box-shadow: 0 0 6px rgba(25, 227, 168, 0.6);
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color .2s ease;
        }

        .faq-item.active {
            border-color: rgba(25, 227, 168, 0.25);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            background: transparent;
            color: var(--text-main);
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            text-align: left;
            transition: color .2s ease;
        }

        .faq-item.active .faq-question {
            color: var(--brand);
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--text-sub);
            transition: transform .2s ease, background .2s ease, color .2s ease;
            font-style: normal;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: rgba(25, 227, 168, 0.12);
            color: var(--brand);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .2s ease, padding .2s ease;
            padding: 0 24px;
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.7;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding-bottom: 20px;
        }

        /* ===== CTA Banner ===== */
        .cta-banner {
            position: relative;
            background: var(--bg-panel);
            border-top: 1px solid var(--border-color);
            overflow: hidden;
            padding: 72px 0;
        }

        .cta-banner::before {
            content: "";
            position: absolute;
            top: 0;
            left: -10%;
            width: 30%;
            height: 100%;
            background: linear-gradient(40deg, transparent, rgba(25, 227, 168, 0.1), transparent);
            transform: skewX(-10deg);
        }

        .cta-banner::after {
            content: "";
            position: absolute;
            top: -60px;
            left: 40%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(124, 92, 255, 0.1), transparent 70%);
            pointer-events: none;
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }

        .cta-text h2 {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 8px;
        }

        .cta-text p {
            font-size: 16px;
            color: var(--text-sub);
            max-width: 480px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #070A0E;
            border-top: 1px solid var(--border-color);
            padding: 64px 0 0;
        }

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

        .footer-brand-name {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .footer-desc {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 16px;
        }

        .footer-col a {
            display: block;
            font-size: 13px;
            color: var(--text-sub);
            margin-bottom: 10px;
            transition: color .2s ease;
        }

        .footer-col a:hover {
            color: var(--text-main);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 12px;
            color: var(--text-disabled);
        }

        .footer-bottom a {
            color: var(--text-disabled);
        }

        .footer-bottom a:hover {
            color: var(--text-sub);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .desktop-nav {
                display: none;
            }

            .mobile-menu-btn {
                display: inline-flex;
            }

            .header-cta-btn {
                display: none;
            }

            .mobile-tabbar {
                display: flex;
            }

            main {
                padding-bottom: 70px;
            }

            .section-padding {
                padding: 72px 0;
            }

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

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

            .feature-split {
                flex-direction: column;
                gap: 40px;
            }
        }

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

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

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

            .page-banner h1 {
                font-size: 32px;
            }

            .page-banner .banner-desc {
                font-size: 16px;
            }

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

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .stat-number {
                font-size: 32px;
            }

            .section-title {
                font-size: 28px;
            }

            .schedule-wrap {
                padding: 20px;
            }

            .schedule-item {
                flex-wrap: wrap;
                gap: 12px;
            }

            .schedule-date {
                width: 100%;
                text-align: left;
                display: inline-flex;
                align-items: center;
                gap: 8px;
            }

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

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

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px 24px;
            }

            .footer-grid>div:first-child {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                height: 60px;
            }

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

            .logo-icon {
                width: 30px;
                height: 30px;
            }

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

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

            .feature-item {
                padding: 16px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

/* roulang page: article */
:root {
  --brand: #19E3A8;
  --brand-hover: #0FC58C;
  --brand-active: #0EA97A;
  --accent: #7C5CFF;
  --bg-dark: #0B0F14;
  --bg-card: #151C24;
  --bg-hover: #1A2330;
  --text-primary: #EAF0F6;
  --text-secondary: #8B98AA;
  --text-disabled: #4A5568;
  --border: rgba(255,255,255,0.08);
  --success: #10B981;
  --warning: #F5A623;
  --error: #EF4444;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-default: 0 8px 24px rgba(0,0,0,0.4);
  --shadow-hover: 0 0 0 1px rgba(25,227,168,0.5), 0 12px 32px rgba(25,227,168,0.1);
  --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-stack);
  background-color: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}
button, input, select, textarea {
  font-family: inherit;
}
.container-custom {
  max-width: 1280px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
@media (max-width: 767px) {
  .container-custom {
    padding-left: 16px;
    padding-right: 16px;
  }
}
.text-brand {
  color: var(--brand);
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 20px;
  height: 40px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all .2s ease;
  white-space: nowrap;
}
.btn:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}
.btn-primary {
  background: var(--brand);
  color: var(--bg-dark);
  font-weight: 700;
}
.btn-primary:hover {
  background: var(--brand-hover);
  box-shadow: 0 0 20px rgba(25,227,168,0.35);
  transform: translateY(-1px);
}
.btn-primary:active {
  background: var(--brand-active);
  transform: translateY(0);
}
.btn-secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-primary);
}
.btn-secondary:hover {
  border-color: var(--brand);
  color: var(--brand);
}
.btn-lg {
  height: 50px;
  padding: 0 32px;
  font-size: 16px;
  border-radius: 12px;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(11,15,20,0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.logo-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(25,227,168,0.12);
  color: var(--brand);
  border: 1px solid rgba(25,227,168,0.25);
}
.log-text {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 1px;
  color: var(--text-primary);
}
.desktop-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link {
  position: relative;
  display: inline-block;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 8px;
  transition: color .2s, background .2s;
}
.nav-link:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.04);
}
.nav-link.active {
  color: var(--brand);
  font-weight: 600;
}
.nav-link.active::after {
  content: '';
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 4px;
  height: 2px;
  background: var(--brand);
  border-radius: 2px;
  box-shadow: 0 0 8px rgba(25,227,168,0.6);
}
.header-cta-btn {
  flex-shrink: 0;
}
.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-primary);
  align-items: center;
  justify-content: center;
  cursor: pointer;
  margin-right: 8px;
}
.mobile-dropdown {
  display: none;
  position: absolute;
  top: 68px;
  left: 0;
  right: 0;
  background: rgba(11,15,20,0.98);
  border-bottom: 1px solid var(--border);
  padding: 12px 16px 20px;
  flex-direction: column;
  gap: 4px;
  z-index: 999;
}
.mobile-dropdown a {
  display: block;
  padding: 14px 16px;
  font-size: 16px;
  color: var(--text-secondary);
  border-radius: 8px;
}
.mobile-dropdown a:hover,
.mobile-dropdown a.active {
  color: var(--brand);
  background: rgba(25,227,168,0.06);
}
.mobile-dropdown.open {
  display: flex;
}
@media (max-width: 767px) {
  .desktop-nav, .header-cta-btn {
    display: none;
  }
  .mobile-menu-btn {
    display: inline-flex;
  }
  .site-header {
    height: 60px;
  }
  .header-inner {
    height: 60px;
  }
}
@media (min-width: 768px) {
  .mobile-dropdown {
    display: none !important;
  }
}

/* ===== Mobile Tabbar ===== */
.mobile-tabbar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: calc(58px + env(safe-area-inset-bottom));
  padding-bottom: env(safe-area-inset-bottom);
  background: rgba(11,15,20,0.96);
  backdrop-filter: blur(16px);
  border-top: 1px solid var(--border);
  z-index: 1000;
  align-items: stretch;
}
.tab-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  font-size: 11px;
  color: var(--text-secondary);
  transition: color .2s;
}
.tab-item svg {
  width: 20px;
  height: 20px;
}
.tab-item.active {
  color: var(--brand);
}
.tab-item.active svg {
  filter: drop-shadow(0 0 6px rgba(25,227,168,0.6));
}
@media (max-width: 767px) {
  .mobile-tabbar {
    display: flex;
  }
  main {
    padding-bottom: 70px;
  }
}

/* ===== Breadcrumb ===== */
.breadcrumb-wrap {
  padding: 20px 0 8px;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  background: linear-gradient(180deg, rgba(25,227,168,0.03), transparent);
}
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
}
.breadcrumb a {
  color: var(--text-secondary);
  transition: color .2s;
}
.breadcrumb a:hover {
  color: var(--brand);
}
.breadcrumb-sep {
  color: var(--text-disabled);
}
.breadcrumb-current {
  color: var(--text-primary);
  font-weight: 500;
  max-width: 300px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
@media (max-width: 767px) {
  .breadcrumb-wrap {
    padding: 16px 0 4px;
  }
  .breadcrumb-current {
    max-width: 180px;
  }
}

/* ===== Article Layout ===== */
.article-main {
  padding: 32px 0 56px;
}
.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 48px;
  box-shadow: var(--shadow-default);
  max-width: 860px;
  margin: 0 auto;
}
.article-header {
  margin-bottom: 32px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 28px;
}
.article-header h1 {
  font-size: 34px;
  font-weight: 800;
  line-height: 1.3;
  margin: 16px 0 20px;
  color: var(--text-primary);
  letter-spacing: 0.5px;
}
.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 13px;
  color: var(--text-secondary);
}
.article-meta .meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.article-meta .badge {
  background: rgba(25,227,168,0.12);
  color: var(--brand);
  border: 1px solid rgba(25,227,168,0.3);
  padding: 3px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}
.article-hero-img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  margin-bottom: 32px;
  box-shadow: var(--shadow-default);
}
.article-body {
  font-size: 16px;
  line-height: 1.85;
  color: #C4D0DE;
}
.article-body > p {
  margin-bottom: 24px;
}
.article-body h2 {
  font-size: 26px;
  font-weight: 800;
  color: var(--text-primary);
  margin: 44px 0 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  letter-spacing: 0.3px;
}
.article-body h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 32px 0 14px;
}
.article-body h4 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 24px 0 10px;
}
.article-body a {
  color: var(--brand);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color .2s;
}
.article-body a:hover {
  color: #fff;
}
.article-body blockquote {
  border-left: 3px solid var(--brand);
  background: rgba(25,227,168,0.05);
  padding: 18px 24px;
  margin: 28px 0;
  border-radius: 0 12px 12px 0;
  color: var(--text-secondary);
  font-size: 15px;
}
.article-body img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  margin: 28px 0;
  box-shadow: var(--shadow-default);
}
.article-body ul,
.article-body ol {
  margin: 20px 0;
  padding-left: 24px;
}
.article-body li {
  margin-bottom: 10px;
  line-height: 1.8;
}
.article-body li::marker {
  color: var(--brand);
}
.article-body strong {
  color: var(--text-primary);
  font-weight: 700;
}
.article-body em {
  font-style: italic;
  color: var(--text-primary);
}
.article-body code {
  background: rgba(25,227,168,0.1);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 14px;
  color: var(--brand);
  font-family: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
}
.article-body pre {
  background: #0F141A;
  border: 1px solid var(--border);
  padding: 20px;
  border-radius: 12px;
  overflow-x: auto;
  margin: 24px 0;
}
.article-body pre code {
  background: none;
  padding: 0;
  color: #EAF0F6;
}
.article-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 32px 0;
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 14px;
}
.article-body th,
.article-body td {
  border: 1px solid #1E2832;
  padding: 12px 16px;
  text-align: left;
}
.article-body th {
  background: rgba(25,227,168,0.06);
  color: var(--text-primary);
  font-weight: 600;
}

@media (max-width: 767px) {
  .article-card {
    padding: 24px 20px;
    border-radius: 12px;
  }
  .article-header h1 {
    font-size: 26px;
    line-height: 1.35;
  }
  .article-meta {
    gap: 10px;
  }
  .article-body {
    font-size: 15px;
  }
  .article-body h2 {
    font-size: 22px;
  }
  .article-body h3 {
    font-size: 18px;
  }
}

/* ===== Article Tags ===== */
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 13px;
  color: var(--text-secondary);
  transition: all .2s;
  cursor: pointer;
}
.tag:hover {
  border-color: var(--brand);
  color: var(--brand);
  background: rgba(25,227,168,0.06);
}

/* ===== Pagination ===== */
.article-pagination {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  max-width: 860px;
  margin: 32px auto 0;
}
.pagination-link {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  transition: all .2s;
}
.pagination-link:hover {
  border-color: var(--brand);
  box-shadow: 0 4px 16px rgba(25,227,168,0.08);
  transform: translateY(-2px);
}
.pagination-label {
  display: block;
  font-size: 12px;
  color: var(--text-disabled);
  margin-bottom: 6px;
  letter-spacing: 1px;
}
.pagination-title {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.pagination-link:hover .pagination-title {
  color: var(--brand);
}
.pagination-next {
  text-align: right;
}
@media (max-width: 767px) {
  .article-pagination {
    grid-template-columns: 1fr;
  }
  .pagination-next {
    text-align: left;
  }
}

/* ===== Related Section ===== */
.related-section {
  max-width: 860px;
  margin: 48px auto 0;
}
.related-section-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 24px;
  color: var(--text-primary);
}
.related-section-title::before {
  content: '';
  width: 4px;
  height: 24px;
  background: var(--brand);
  border-radius: 4px;
  box-shadow: 0 0 12px rgba(25,227,168,0.4);
}
.related-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
.related-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  transition: all .25s;
}
.related-card:hover {
  border-color: var(--brand);
  box-shadow: 0 8px 24px rgba(25,227,168,0.08);
  transform: translateX(4px);
}
.related-card-thumb {
  width: 120px;
  height: 76px;
  flex-shrink: 0;
  overflow: hidden;
}
.related-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .3s;
}
.related-card:hover .related-card-thumb img {
  transform: scale(1.06);
}
.related-card-body {
  flex: 1;
  padding: 12px 16px 12px 0;
  min-width: 0;
}
.related-card-body h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  line-height: 1.5;
}
.related-card-body .related-date {
  font-size: 12px;
  color: var(--text-disabled);
}
.related-card-body .linked-text {
  font-size: 13px;
  color: var(--brand);
  font-weight: 600;
}
.related-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 4px;
}
@media (max-width: 767px) {
  .related-card-thumb {
    width: 96px;
    height: 64px;
  }
  .related-card-body h3 {
    font-size: 14px;
  }
}

/* ===== Back Category ===== */
.back-category {
  max-width: 860px;
  margin: 32px auto 0;
  text-align: center;
}
.btn-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 10px;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: all .2s;
  background: transparent;
}
.btn-back:hover {
  border-color: var(--brand);
  color: var(--brand);
  background: rgba(25,227,168,0.06);
}
.btn-back svg {
  width: 16px;
  height: 16px;
}

/* ===== Not Found ===== */
.not-found {
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 80px 40px;
  text-align: center;
}
.not-found h1 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 12px;
}
.not-found p {
  color: var(--text-secondary);
  margin-bottom: 28px;
  font-size: 15px;
}

/* ===== CTA Banner ===== */
.cta-banner {
  position: relative;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
  padding: 64px 0;
}
.cta-banner::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(25,227,168,0.15), transparent 70%);
  pointer-events: none;
}
.cta-banner::after {
  content: '';
  position: absolute;
  top: 0;
  left: 30%;
  width: 260px;
  height: 100%;
  background: linear-gradient(40deg, transparent, rgba(25,227,168,0.08), transparent);
  transform: skewX(-40deg);
  pointer-events: none;
}
.cta-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-inner h2 {
  font-size: 30px;
  font-weight: 800;
  line-height: 1.3;
  max-width: 480px;
}
.cta-inner h2 .text-brand {
  color: var(--brand);
}
.cta-inner p {
  color: var(--text-secondary);
  margin-top: 8px;
  font-size: 15px;
  max-width: 520px;
}
@media (max-width: 767px) {
  .cta-banner {
    padding: 44px 0;
  }
  .cta-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }
  .cta-inner h2 {
    font-size: 24px;
  }
}

/* ===== Footer ===== */
.site-footer {
  background: #080C11;
  border-top: 1px solid var(--border);
  padding: 56px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 40px;
}
.footer-brand-name {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
}
.footer-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 320px;
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  font-size: 13px;
  color: var(--text-secondary);
  padding: 6px 0;
  transition: color .2s;
}
.footer-col a:hover {
  color: var(--brand);
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  border-top: 1px solid var(--border);
  padding-top: 20px;
  font-size: 12px;
  color: var(--text-disabled);
}
.footer-bottom a {
  color: var(--text-disabled);
  transition: color .2s;
}
.footer-bottom a:hover {
  color: var(--text-secondary);
}
@media (max-width: 1023px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 767px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .site-footer {
    padding: 40px 0 90px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* roulang page: category2 */
:root {
            --brand: #19E3A8;
            --brand-hover: #0FC58C;
            --brand-active: #0EA97A;
            --accent: #7C5CFF;
            --bg: #0B0F14;
            --surface: #151C24;
            --surface-hover: #1A2330;
            --text: #EAF0F6;
            --text-muted: #8B98AA;
            --border: rgba(255, 255, 255, 0.08);
            --radius-lg: 16px;
            --radius-md: 10px;
            --radius-sm: 8px;
            --shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
            --shadow-hover: 0 0 0 1px rgba(25, 227, 168, 0.6), 0 12px 32px rgba(25, 227, 168, 0.1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

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

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

        .container-custom {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .text-brand {
            color: var(--brand);
        }

        /* ---------- Header ---------- */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(11, 15, 20, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
            transition: box-shadow 0.3s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }

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

        .logo-icon {
            width: 34px;
            height: 34px;
            border-radius: 10px;
            background: rgba(25, 227, 168, 0.12);
            color: var(--brand);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: background 0.3s, transform 0.3s;
        }

        .logo-wrap:hover .logo-icon {
            background: rgba(25, 227, 168, 0.22);
            transform: rotate(20deg);
        }

        .log-text {
            font-size: 20px;
            font-weight: 800;
            letter-spacing: 0.5px;
            color: var(--text);
        }

        .desktop-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .nav-link {
            position: relative;
            display: inline-flex;
            align-items: center;
            padding: 10px 16px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-muted);
            border-radius: 8px;
            transition: color 0.25s, background 0.25s;
        }

        .nav-link:hover {
            color: var(--text);
            background: rgba(255, 255, 255, 0.04);
        }

        .nav-link.active {
            color: var(--brand);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 2px;
            height: 2px;
            border-radius: 2px;
            background: var(--brand);
            box-shadow: 0 0 12px rgba(25, 227, 168, 0.8);
        }

        .header-cta-btn {
            flex-shrink: 0;
        }

        .mobile-menu-btn {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            align-items: center;
            justify-content: center;
            color: var(--text);
            border: 1px solid var(--border);
            background: var(--surface);
        }

        .mobile-dropdown {
            display: none;
            flex-direction: column;
            padding: 8px 16px 16px;
            background: var(--bg);
            border-bottom: 1px solid var(--border);
        }

        .mobile-dropdown.open {
            display: flex;
        }

        .mobile-dropdown a {
            padding: 12px 12px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-muted);
            border-radius: 8px;
        }

        .mobile-dropdown a:hover,
        .mobile-dropdown a.active {
            color: var(--brand);
            background: rgba(25, 227, 168, 0.08);
        }

        /* 移动底部 Tab */
        .mobile-tabbar {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 60;
            height: calc(58px + env(safe-area-inset-bottom));
            padding-bottom: env(safe-area-inset-bottom);
            background: rgba(11, 15, 20, 0.96);
            backdrop-filter: blur(18px);
            border-top: 1px solid var(--border);
        }

        .mobile-tabbar-inner {
            display: flex;
            height: 58px;
            align-items: stretch;
        }

        .tab-item {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 3px;
            font-size: 12px;
            font-weight: 600;
            color: var(--text-muted);
            transition: color 0.2s;
        }

        .tab-item svg {
            width: 20px;
            height: 20px;
        }

        .tab-item.active {
            color: var(--brand);
        }

        .tab-item.active svg {
            filter: drop-shadow(0 0 6px rgba(25, 227, 168, 0.7));
        }

        /* ---------- Buttons ---------- */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-md);
            font-size: 15px;
            font-weight: 700;
            line-height: 1;
            transition: all 0.25s ease;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--brand);
            color: #0B0F14;
        }

        .btn-primary:hover {
            background: var(--brand-hover);
            box-shadow: 0 0 0 1px rgba(25, 227, 168, 0.4), 0 8px 24px rgba(25, 227, 168, 0.25);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            background: var(--brand-active);
            transform: translateY(1px);
            box-shadow: none;
        }

        .btn-secondary {
            background: transparent;
            color: var(--text);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .btn-secondary:hover {
            border-color: var(--brand);
            color: var(--brand);
            background: rgba(25, 227, 168, 0.06);
        }

        .btn:focus-visible {
            outline: 2px solid var(--brand);
            outline-offset: 2px;
        }

        /* ---------- Hero ---------- */
        .academy-hero {
            position: relative;
            padding: 88px 0 72px;
            background:
                radial-gradient(ellipse 500px 320px at 78% 20%, rgba(25, 227, 168, 0.08), transparent 60%),
                radial-gradient(ellipse 400px 300px at 10% 80%, rgba(124, 92, 255, 0.06), transparent 55%),
                linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
            background-size: auto, auto, 40px 40px, 40px 40px;
            border-bottom: 1px solid var(--border);
            overflow: hidden;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 7fr 5fr;
            gap: 56px;
            align-items: center;
        }

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

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 14px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            color: var(--brand);
            background: rgba(25, 227, 168, 0.10);
            border: 1px solid rgba(25, 227, 168, 0.25);
            margin-bottom: 24px;
        }

        .hero-badge::before {
            content: '';
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--brand);
            box-shadow: 0 0 8px var(--brand);
        }

        .academy-hero h1 {
            font-size: 48px;
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.5px;
            margin-bottom: 20px;
            color: var(--text);
        }

        .hero-subtitle {
            font-size: 18px;
            line-height: 1.7;
            color: var(--text-muted);
            max-width: 520px;
            margin-bottom: 32px;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 40px;
        }

        .hero-meta {
            display: flex;
            gap: 40px;
            flex-wrap: wrap;
        }

        .hero-meta strong {
            display: block;
            font-size: 28px;
            font-weight: 800;
            color: var(--text);
            font-variant-numeric: tabular-nums;
        }

        .hero-meta span {
            font-size: 13px;
            color: var(--text-muted);
        }

        .hero-visual {
            position: relative;
        }

        .hero-visual img {
            border-radius: 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            width: 100%;
            height: auto;
            object-fit: cover;
            aspect-ratio: 4/3;
        }

        .float-badge {
            position: absolute;
            bottom: 20px;
            left: -18px;
            padding: 12px 18px;
            border-radius: 12px;
            background: rgba(21, 28, 36, 0.95);
            border: 1px solid rgba(25, 227, 168, 0.35);
            box-shadow: var(--shadow);
            font-size: 13px;
            font-weight: 600;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .float-badge::after {
            content: '';
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--brand);
            box-shadow: 0 0 10px var(--brand);
        }

        /* ---------- Section Head ---------- */
        .section-tag {
            display: inline-block;
            padding: 5px 12px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 700;
            color: var(--brand);
            background: rgba(25, 227, 168, 0.1);
            letter-spacing: 0.5px;
            margin-bottom: 14px;
        }

        .section-head {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 56px;
        }

        .section-head h2 {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 16px;
            color: var(--text);
        }

        .section-head p {
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-muted);
        }

        /* ---------- Courses 编号条目 ---------- */
        .courses-section {
            padding: 96px 0;
            position: relative;
        }

        .numbered-list {
            display: flex;
            flex-direction: column;
            gap: 24px;
            max-width: 960px;
            margin: 0 auto;
        }

        .numbered-item {
            display: grid;
            grid-template-columns: 110px 1fr;
            gap: 24px;
            padding: 32px 36px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .numbered-item::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: var(--brand);
            opacity: 0;
            transition: opacity 0.3s;
        }

        .numbered-item:hover {
            background: var(--surface-hover);
            border-color: rgba(25, 227, 168, 0.25);
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
        }

        .numbered-item:hover::before {
            opacity: 1;
        }

        .item-num {
            font-size: 52px;
            font-weight: 800;
            line-height: 1;
            color: var(--brand);
            font-variant-numeric: tabular-nums;
            opacity: 0.85;
            display: flex;
            align-items: flex-start;
        }

        .item-body h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
        }

        .item-body p {
            font-size: 15px;
            line-height: 1.75;
            color: var(--text-muted);
            margin-bottom: 18px;
            max-width: 600px;
        }

        .item-meta {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }

        .item-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-muted);
        }

        .item-meta span::before {
            content: '';
            width: 5px;
            height: 5px;
            border-radius: 50%;
            background: var(--brand);
        }

        .item-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 14px;
            font-weight: 700;
            color: var(--brand);
            margin-top: 14px;
            transition: gap 0.25s;
        }

        .item-link:hover {
            gap: 8px;
        }

        /* ---------- Stats ---------- */
        .stats-section {
            padding: 72px 0;
            background: var(--surface);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

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

        .stat-item {
            text-align: center;
            padding: 24px 16px;
            border-radius: var(--radius-lg);
            background: var(--bg);
            border: 1px solid var(--border);
            transition: all 0.3s;
        }

        .stat-item:hover {
            border-color: rgba(25, 227, 168, 0.3);
            transform: translateY(-3px);
        }

        .stat-item strong {
            display: block;
            font-size: 40px;
            font-weight: 800;
            color: var(--brand);
            line-height: 1.2;
            margin-bottom: 4px;
            font-variant-numeric: tabular-nums;
        }

        .stat-item span {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* ---------- Coaches 特色 ---------- */
        .coaches-section {
            padding: 96px 0;
        }

        .coach-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .coach-visual img {
            border-radius: 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            width: 100%;
            height: auto;
            aspect-ratio: 4/3;
            object-fit: cover;
        }

        .coach-content h2 {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 20px;
        }

        .coach-content p {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-muted);
            margin-bottom: 24px;
        }

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

        .coach-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            color: var(--text);
        }

        .coach-list li::before {
            content: '';
            flex-shrink: 0;
            width: 8px;
            height: 8px;
            border-radius: 2px;
            background: var(--brand);
            margin-top: 7px;
        }

        /* ---------- Testimonials ---------- */
        .testi-section {
            padding: 0 0 96px;
        }

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

        .testi-card {
            padding: 28px 32px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            transition: all 0.3s;
        }

        .testi-card:hover {
            transform: translateY(-3px);
            border-color: rgba(25, 227, 168, 0.25);
            box-shadow: var(--shadow-hover);
        }

        .testi-card blockquote {
            font-size: 15px;
            line-height: 1.8;
            color: var(--text);
            margin-bottom: 16px;
        }

        .testi-card figcaption {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .testi-card figcaption::before {
            content: '';
            width: 22px;
            height: 1px;
            background: var(--brand);
        }

        /* ---------- Membership ---------- */
        .membership-section {
            padding: 96px 0;
            background:
                linear-gradient(rgba(11, 15, 20, 0.94), rgba(11, 15, 20, 0.97)),
                url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            scroll-margin-top: 80px;
        }

        .member-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            max-width: 960px;
            margin: 0 auto;
        }

        .member-card {
            position: relative;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            text-align: center;
            transition: all 0.3s;
        }

        .member-card.featured {
            border-color: rgba(25, 227, 168, 0.55);
            box-shadow: 0 0 0 1px rgba(25, 227, 168, 0.3), 0 16px 40px rgba(25, 227, 168, 0.08);
            transform: scale(1.02);
        }

        .member-card .vip-tag {
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            padding: 4px 14px;
            font-size: 12px;
            font-weight: 700;
            border-radius: 999px;
            background: var(--brand);
            color: #0B0F14;
            box-shadow: 0 0 20px rgba(25, 227, 168, 0.4);
        }

        .member-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }

        .member-card .price {
            font-size: 36px;
            font-weight: 800;
            color: var(--text);
            line-height: 1.2;
            margin-bottom: 4px;
        }

        .member-card .price small {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted);
        }

        .member-card p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .member-card ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin-bottom: 24px;
        }

        .member-card ul li {
            font-size: 14px;
            color: var(--text);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .member-card ul li::before {
            content: '✓';
            color: var(--brand);
            font-weight: 700;
        }

        .member-card .btn {
            width: 100%;
        }

        /* ---------- FAQ ---------- */
        .faq-section {
            padding: 96px 0 80px;
        }

        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 12px;
            overflow: hidden;
            transition: border-color 0.3s;
        }

        .faq-item.open {
            border-left: 3px solid var(--brand);
            border-color: rgba(25, 227, 168, 0.35);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            width: 100%;
            transition: color 0.25s;
        }

        .faq-question:hover {
            color: var(--brand);
        }

        .faq-question .arrow {
            flex-shrink: 0;
            width: 18px;
            height: 18px;
            border-right: 2px solid currentColor;
            border-bottom: 2px solid currentColor;
            transform: rotate(45deg);
            transition: transform 0.25s;
            margin-top: -4px;
        }

        .faq-item.open .faq-question {
            color: var(--brand);
        }

        .faq-item.open .faq-question .arrow {
            transform: rotate(225deg);
            margin-top: 6px;
        }

        .faq-answer {
            max-height: 0;
            opacity: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, opacity 0.3s ease, padding 0.3s ease;
            padding: 0 24px;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
            opacity: 1;
            padding: 0 24px 20px;
        }

        .faq-answer p {
            font-size: 15px;
            line-height: 1.75;
            color: var(--text-muted);
        }

        .faq-extra {
            text-align: center;
            margin-top: 32px;
            font-size: 14px;
            color: var(--text-muted);
        }

        .faq-extra a {
            color: var(--brand);
            font-weight: 700;
        }

        /* ---------- CTA ---------- */
        .cta-section {
            position: relative;
            padding: 20px 0 0;
        }

        .cta-banner {
            position: relative;
            overflow: hidden;
            background: linear-gradient(135deg, #0B0F14 0%, #131A23 100%);
            border: 1px solid var(--border);
            border-radius: 24px;
            padding: 56px 64px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            top: -40%;
            left: -10%;
            width: 55%;
            height: 180%;
            background: var(--brand);
            opacity: 0.08;
            transform: rotate(40deg);
            pointer-events: none;
        }

        .cta-banner h2 {
            position: relative;
            font-size: 32px;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text);
            margin-bottom: 12px;
        }

        .cta-banner p {
            position: relative;
            font-size: 16px;
            color: var(--text-muted);
            max-width: 520px;
        }

        .cta-banner .btn {
            position: relative;
            flex-shrink: 0;
            padding: 16px 36px;
            font-size: 16px;
        }

        /* ---------- Footer ---------- */
        .site-footer {
            background: #090C10;
            border-top: 1px solid var(--border);
            padding-top: 64px;
            padding-bottom: 0;
        }

        .site-footer.mt-24 {
            margin-top: 96px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
        }

        .footer-brand-name {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 19px;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 16px;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.75;
            color: var(--text-muted);
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .footer-col a {
            display: block;
            font-size: 13px;
            color: var(--text-muted);
            line-height: 2.2;
            transition: color 0.2s;
        }

        .footer-col a:hover {
            color: var(--text);
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            border-top: 1px solid var(--border);
            padding: 20px 0 24px;
            font-size: 12px;
            color: var(--text-muted);
        }

        .footer-bottom a {
            color: var(--text-muted);
        }

        /* ---------- Responsive ---------- */
        @media (max-width: 1023px) {
            .desktop-nav {
                display: none;
            }

            .mobile-menu-btn {
                display: inline-flex;
            }

            .header-cta-btn {
                display: none;
            }

            .coach-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

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

            .member-grid {
                grid-template-columns: 1fr;
                max-width: 480px;
            }

            .member-card.featured {
                transform: none;
            }
        }

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

            .site-footer.mt-24 {
                margin-top: 56px;
            }

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

            .hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .academy-hero h1 {
                font-size: 32px;
            }

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

            .hero-meta {
                gap: 24px;
            }

            .hero-meta strong {
                font-size: 22px;
            }

            .float-badge {
                left: 12px;
                bottom: 12px;
                font-size: 12px;
            }

            .courses-section {
                padding: 56px 0;
            }

            .numbered-item {
                grid-template-columns: 1fr;
                gap: 12px;
                padding: 24px;
            }

            .item-num {
                font-size: 38px;
            }

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

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

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

            .stat-item strong {
                font-size: 30px;
            }

            .coaches-section {
                padding: 56px 0;
            }

            .coach-content h2 {
                font-size: 26px;
            }

            .testi-section {
                padding-bottom: 56px;
            }

            .testi-card {
                padding: 24px;
            }

            .membership-section {
                padding: 56px 0;
            }

            .cta-banner {
                flex-direction: column;
                padding: 40px 28px;
                text-align: center;
            }

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

            .faq-section {
                padding: 56px 0 48px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px 24px;
            }

            .mobile-tabbar {
                display: block;
            }

            main {
                padding-bottom: 68px;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

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

            .item-meta {
                gap: 12px;
            }

            .stats-grid {
                gap: 12px;
            }

            .stat-item {
                padding: 20px 12px;
            }

            .stat-item strong {
                font-size: 26px;
            }
        }

        /* 打印和辅助 */
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border-width: 0;
        }