/* roulang page: index */
:root {
      --deep-space: #0B0C1E;
      --nebula-purple: #6C3CE1;
      --warm-gold: #D4A843;
      --gold-light: rgba(212, 168, 67, 0.7);
      --card-bg: rgba(255, 255, 255, 0.03);
      --border-gold-dim: rgba(212, 168, 67, 0.15);
      --border-glow: rgba(212, 168, 67, 0.4);
      --text-primary: #F5F3F0;
      --text-secondary: #B0B8C5;
      --text-muted: #7A8494;
      --font-sans: 'Noto Sans SC', 'Inter', system-ui, sans-serif;
      --font-mono: 'Inter', monospace;
      --radius-card: 20px;
      --radius-btn: 50px;
      --radius-input: 12px;
      --shadow-glow: 0 16px 40px rgba(108, 60, 225, 0.25);
      --transition-smooth: 300ms ease;
    }

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

    body {
      background-color: var(--deep-space);
      color: var(--text-primary);
      font-family: var(--font-sans);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }

    @media (max-width: 768px) {
      .container {
        padding: 0 20px;
      }
    }

    /* 导航栏 */
    .nav-blur {
      background: rgba(11, 12, 30, 0.8);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(212, 168, 67, 0.1);
    }

    .search-box {
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(212, 168, 67, 0.2);
      border-radius: 50px;
      transition: border 0.2s, background 0.2s;
    }
    .search-box:focus-within {
      border-color: var(--warm-gold);
      background: rgba(255,255,255,0.08);
    }
    .search-input::placeholder {
      color: var(--text-muted);
      font-weight: 400;
    }

    .nav-link {
      color: var(--text-secondary);
      font-weight: 500;
      transition: color 0.2s;
      font-size: 0.95rem;
    }
    .nav-link:hover {
      color: var(--warm-gold);
    }

    /* 按钮 */
    .btn-primary {
      background: linear-gradient(135deg, #D4A843 0%, #B58C30 100%);
      color: #0B0C1E;
      font-weight: 600;
      border-radius: var(--radius-btn);
      padding: 14px 32px;
      box-shadow: 0 8px 18px rgba(212,168,67,0.25);
      transition: all var(--transition-smooth);
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      filter: brightness(1.15);
      box-shadow: 0 12px 28px rgba(212,168,67,0.4);
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      border: 1px solid var(--warm-gold);
      color: var(--warm-gold);
      font-weight: 600;
      border-radius: var(--radius-btn);
      padding: 14px 32px;
      transition: all var(--transition-smooth);
      cursor: pointer;
    }
    .btn-outline:hover {
      background: rgba(212,168,67,0.1);
      border-color: var(--gold-light);
    }

    /* 卡片通用 */
    .glass-card {
      background: var(--card-bg);
      border: 1px solid var(--border-gold-dim);
      border-radius: var(--radius-card);
      backdrop-filter: blur(8px);
      transition: all var(--transition-smooth);
    }
    .glass-card:hover {
      border-color: var(--border-glow);
      box-shadow: var(--shadow-glow);
    }

    .stat-badge {
      background: rgba(255,255,255,0.04);
      border-radius: 20px;
      padding: 20px 24px;
      text-align: center;
      border: 1px solid rgba(212,168,67,0.2);
    }
    .stat-number {
      font-family: var(--font-mono);
      font-size: 40px;
      font-weight: 700;
      background: linear-gradient(180deg, #F5E7B3 0%, #D4A843 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .section-title {
      font-size: 32px;
      font-weight: 600;
      letter-spacing: -0.3px;
      margin-bottom: 16px;
      color: #fff;
    }
    @media (max-width: 768px) {
      .section-title {
        font-size: 28px;
      }
    }

    .pill-tag {
      background: rgba(108,60,225,0.25);
      color: #D4A843;
      border-radius: 30px;
      padding: 4px 14px;
      font-size: 13px;
      font-weight: 500;
      display: inline-block;
    }

    /* 表格样式 */
    .compare-table th {
      background: rgba(108,60,225,0.3);
      font-weight: 600;
      color: #F5F3F0;
    }
    .compare-table td, .compare-table th {
      padding: 18px 16px;
      border-bottom: 1px solid rgba(212,168,67,0.1);
    }
    .highlight-col {
      border-left: 3px solid var(--warm-gold);
      background: rgba(212,168,67,0.04);
    }

    /* FAQ 手风琴 */
    .faq-item {
      border-bottom: 1px solid rgba(212,168,67,0.15);
    }
    .faq-question {
      background: rgba(255,255,255,0.03);
      padding: 18px 20px;
      font-weight: 500;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: background 0.2s;
    }
    .faq-question:hover {
      background: rgba(255,255,255,0.06);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.25s ease, padding 0.25s ease;
      background: rgba(0,0,0,0.2);
      color: #C8CFDA;
      line-height: 1.8;
      padding: 0 20px;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 16px 20px;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    /* 瀑布流模拟 (masonry 使用 column 布局) */
    .masonry-grid {
      column-count: 3;
      column-gap: 24px;
    }
    .masonry-item {
      break-inside: avoid;
      margin-bottom: 24px;
      display: inline-block;
      width: 100%;
    }
    @media (max-width: 1024px) {
      .masonry-grid {
        column-count: 2;
      }
    }
    @media (max-width: 640px) {
      .masonry-grid {
        column-count: 1;
      }
    }

    .cover-img {
      height: 180px;
      object-fit: cover;
      border-radius: 16px 16px 0 0;
      width: 100%;
      display: block;
    }

    footer {
      background: #060712;
      border-top: 1px solid rgba(212,168,67,0.25);
    }