:root {
    --bg: #181A1D;
    --surface-1: #1F2226;
    --surface-2: #282C31;
    --surface-3: #343940;
    --line: #3A3F47;
    --text-main: #ECEDEF;
    --text-sub: #9CA1A8;
    --accent: #FF6B35;
    --action: #4A9EFF;
    --radius: 10px;
    --max-width: 1200px;
  }

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

  body {
    background-color: var(--bg);
    color: var(--text-main);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
  }

  a { color: inherit; text-decoration: none; }
  ul { list-style: none; }
  img { display: block; max-width: 100%; object-fit: cover; }

  .top-brand-line {
    height: 3px;
    width: 100%;
    background: linear-gradient(90deg, var(--accent), var(--surface-3));
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1001;
  }

  /* 导航 */
  .site-header {
    position: fixed;
    top: 3px;
    left: 0;
    width: 100%;
    height: 68px;
    background-color: rgba(24, 26, 29, 0.85);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--line);
    z-index: 1000;
    display: flex;
    align-items: center;
    transition: background-color 0.3s;
  }
  .site-header.scrolled { background-color: rgba(24, 26, 29, 0.95); }

  .header-inner {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
  }

  .brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.15rem; white-space: nowrap;}
  .brand img { height: 32px; width: auto; }

  .main-nav { display: flex; gap: 18px; font-size: 0.95rem; color: var(--text-sub); }
  .main-nav a:hover { color: var(--accent); }

  .header-actions { display: flex; align-items: center; gap: 15px; }
  
  .line-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--text-sub);
    background: var(--surface-2);
    padding: 4px 10px;
    border-radius: 20px;
    border: 1px solid var(--line);
  }
  .status-dot { width: 8px; height: 8px; background: #34C759; border-radius: 50%; }
  
  .btn-login {
    background-color: var(--accent);
    color: #fff;
    padding: 6px 16px;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
  }

  /* 公告条 */
  .notice-bar {
    margin-top: 71px;
    background-color: var(--surface-1);
    border-bottom: 1px solid var(--line);
    padding: 8px 20px;
    font-size: 0.85rem;
    color: var(--text-sub);
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .notice-bar span { color: var(--accent); }

  /* 主视觉 */
  .hero {
    max-width: var(--max-width);
    margin: 20px auto;
    padding: 0 20px;
    display: flex;
    gap: 20px;
    height: 520px;
  }

  .hero-main {
    flex: 0 0 62%;
    background-color: var(--surface-1);
    border-radius: var(--radius);
    overflow: hidden;
    position: relative;
  }
  .hero-main img { width: 100%; height: 100%; object-fit: cover; opacity: 0.6; }
  .hero-content {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 30px;
    background: linear-gradient(to top, rgba(0,0,0,0.9), transparent);
  }
  .tag { display: inline-block; background: var(--accent); color: #fff; font-size: 0.75rem; padding: 2px 8px; border-radius: 4px; margin-bottom: 10px; font-weight: 600;}
  .hero-content h1 { font-size: 2rem; margin-bottom: 10px; line-height: 1.2; }
  .hero-content h1 span { color: var(--accent); }
  .hero-content p { color: var(--text-sub); font-size: 0.95rem; margin-bottom: 15px; }
  .hero-btns { display: flex; gap: 10px; }
  .btn-primary { background: var(--accent); color: #fff; padding: 10px 24px; border-radius: 6px; font-weight: 600; text-align: center;}
  .btn-outline { border: 1px solid var(--line); padding: 10px 24px; border-radius: 6px; color: var(--text-main); text-align: center;}

  .hero-side {
    flex: 1;
    background-color: var(--surface-1);
    border-radius: var(--radius);
    padding: 20px;
    display: flex;
    flex-direction: column;
  }
  .hero-side h3 { font-size: 1rem; margin-bottom: 15px; color: var(--text-sub); display: flex; justify-content: space-between; align-items: center; }
  .hero-side h3 a { font-size: 0.8rem; color: var(--text-sub); font-weight: 400;}
  .top-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    border-bottom: 1px solid var(--line);
  }
  .top-list li:last-child { border-bottom: none; }
  .rank { font-size: 1.1rem; font-weight: 700; font-style: italic; width: 20px; color: var(--text-sub); text-align: center;}
  .top-list li:nth-child(1) .rank, .top-list li:nth-child(2) .rank, .top-list li:nth-child(3) .rank { color: var(--accent); }
  .top-list li img { width: 40px; height: 52px; border-radius: 4px; object-fit: cover;}
  .top-info { flex: 1; min-width: 0; }
  .top-info h4 { font-size: 0.9rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .top-info p { font-size: 0.75rem; color: var(--text-sub); }

  /* 快捷栏 */
  .quick-bar {
    max-width: var(--max-width);
    margin: -40px auto 30px;
    padding: 0 20px;
    position: relative;
    z-index: 10;
  }
  .quick-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    background: var(--surface-2);
    border-radius: var(--radius);
    box-shadow: 0 10px 30px rgba(0,0,0,0.4);
    border: 1px solid var(--line);
    overflow: hidden;
  }
  .quick-item {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    border-right: 1px solid var(--line);
    transition: background 0.2s;
  }
  .quick-item:last-child { border-right: none; }
  .quick-item:hover { background: var(--surface-3); }
  .quick-item h4 { font-size: 0.95rem; }
  .quick-item p { font-size: 0.8rem; color: var(--text-sub); }

  /* 通用区块 */
  .section { max-width: var(--max-width); margin: 0 auto 40px; padding: 0 20px; }
  .section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    border-left: 4px solid var(--accent);
    padding-left: 12px;
  }
  .section-header h2 { font-size: 1.4rem; }
  .section-header p { color: var(--text-sub); font-size: 0.9rem; }

  /* 卡片网格 */
  .card-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }
  .comic-card {
    background: var(--surface-2);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid transparent;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
  }
  .comic-card:hover {
    transform: translateY(-3px);
    border-color: var(--accent);
  }
  .cover-wrapper {
    position: relative;
    padding-top: 133%; /* 3:4 */
    background: var(--surface-3);
    overflow: hidden;
  }
  .cover-wrapper img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.2s ease;
  }
  .comic-card:hover .cover-wrapper img { transform: scale(1.03); }
  .badge-edit { position: absolute; top: 0; left: 0; background: var(--accent); color: #fff; font-size: 0.7rem; padding: 2px 8px; border-bottom-right-radius: 6px; }
  
  .card-info { padding: 15px; flex: 1; display: flex; flex-direction: column; gap: 6px; }
  .card-info h3 { font-size: 1rem; }
  .card-info .author { font-size: 0.8rem; color: var(--text-sub); }
  .card-info .tags { display: flex; gap: 6px; flex-wrap: wrap; margin: 4px 0; }
  .card-info .tags span { background: var(--surface-3); font-size: 0.7rem; padding: 2px 6px; border-radius: 4px; color: var(--text-sub);}
  .card-info .desc { font-size: 0.8rem; color: var(--text-sub); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

  /* 教程区 */
  .steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }
  .step-card {
    background: var(--surface-1);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 20px;
    position: relative;
  }
  .step-card .num { color: var(--accent); font-size: 1.5rem; font-weight: 800; opacity: 0.8; font-style: italic;}
  .step-card h3 { font-size: 1.1rem; margin: 10px 0; }
  .step-card p { font-size: 0.85rem; color: var(--text-sub); }

  /* 表格 */
  .route-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    font-size: 0.9rem;
    background: var(--surface-1);
    border-radius: var(--radius);
    overflow: hidden;
  }
  .route-table th, .route-table td { padding: 12px 15px; text-align: left; border-bottom: 1px solid var(--line); }
  .route-table th { background: var(--surface-2); color: var(--text-sub); font-weight: 500; }
  .route-table tr:last-child td { border-bottom: none; }
  .route-table tr:hover td { background: var(--surface-2); }

  /* 双栏 */
  .two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
  }
  .info-box {
    background: var(--surface-2);
    padding: 24px;
    border-radius: var(--radius);
    border: 1px solid var(--line);
  }
  .info-box h3 { font-size: 1.1rem; margin-bottom: 15px; color: var(--accent); }
  .info-box ul { font-size: 0.9rem; color: var(--text-sub); line-height: 2; }

  /* 搜索演示 */
  .mock-search { margin-top: 15px; }
  .mock-input { background: var(--bg); border: 1px solid var(--line); padding: 10px 15px; border-radius: 6px; color: var(--text-main); display: flex; justify-content: space-between;}
  .mock-result { background: var(--bg); border: 1px solid var(--line); border-top: none; border-radius: 0 0 6px 6px; padding: 10px; font-size: 0.85rem;}
  .mock-result p { margin-bottom: 8px; padding-bottom: 8px; border-bottom: 1px solid var(--line); }
  .mock-result p:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: none; }

  /* 截图墙 */
  .gallery {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
  }
  .gallery img { width: 100%; height: auto; border-radius: 6px; border: 1px solid var(--line); transition: transform 0.2s; cursor: pointer; }
  .gallery img:hover { transform: scale(1.02); }

  /* FAQ */
  .faq-item {
    background: var(--surface-1);
    border: 1px solid var(--line);
    border-radius: 6px;
    margin-bottom: 10px;
    cursor: pointer;
  }
  .faq-q { padding: 15px 20px; font-weight: 600; display: flex; justify-content: space-between; align-items: center; }
  .faq-a { padding: 0 20px 15px; color: var(--text-sub); font-size: 0.9rem; display: none; }
  .faq-item.active .faq-a { display: block; }

  /* 页脚 */
  .site-footer {
    background: var(--surface-1);
    border-top: 1px solid var(--line);
    padding: 40px 20px 20px;
    margin-top: 40px;
  }
  .footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-bottom: 30px;
  }
  .footer-col h4 { font-size: 0.95rem; margin-bottom: 15px; color: var(--text-main); }
  .footer-col ul { font-size: 0.85rem; color: var(--text-sub); line-height: 2.2; }
  .footer-bottom {
    max-width: var(--max-width);
    margin: 0 auto;
    padding-top: 20px;
    border-top: 1px solid var(--line);
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-sub);
  }
  .footer-bottom a { color: var(--text-sub); }
  .footer-bottom a:hover { color: var(--accent); }
  .footer-bottom .time { margin-top: 8px; display: inline-block; }

  /* 响应式 */
  @media (max-width: 1024px) {
    .hero { flex-direction: column; height: auto; }
    .hero-main { height: 400px; flex: none; }
    .hero-side { flex: none; }
    .quick-grid { grid-template-columns: repeat(3, 1fr); }
    .quick-item { border-bottom: 1px solid var(--line); }
    .quick-item:nth-child(3n) { border-right: none; }
    .quick-item:nth-child(4), .quick-item:nth-child(5), .quick-item:nth-child(6) { border-bottom: none; }
    .card-grid { grid-template-columns: repeat(3, 1fr); }
    .steps-grid { grid-template-columns: repeat(2, 1fr); }
    .gallery { grid-template-columns: repeat(3, 1fr); }
    .two-col { grid-template-columns: 1fr; }
    .footer-content { grid-template-columns: repeat(2, 1fr); }
    .main-nav { display: none; }
  }

  @media (max-width: 768px) {
    .hero-main { height: 300px; }
    .hero-content h1 { font-size: 1.5rem; }
    .quick-grid { grid-template-columns: repeat(2, 1fr); }
    .quick-item:nth-child(3n) { border-right: 1px solid var(--line); }
    .quick-item:nth-child(2n) { border-right: none; }
    .quick-item:nth-child(5), .quick-item:nth-child(6) { border-bottom: none; }
    .card-grid { grid-template-columns: repeat(2, 1fr); }
    .steps-grid { grid-template-columns: 1fr; }
    .gallery { grid-template-columns: repeat(2, 1fr); }
    .header-actions .line-status, .header-actions .btn-login { display: none; }
    .route-table { display: block; overflow-x: auto; white-space: nowrap; }
  }