/* roulang page: index */
:root {
      --bg-primary: #0A0C14;
      --bg-surface: #121624;
      --bg-surface-elevated: #1A2035;
      --bg-overlay: rgba(10, 12, 20, 0.88);
      --neon-cyan: #00F0FF;
      --neon-purple: #7928CA;
      --neon-pink: #FF0080;
      --text-main: #FFFFFF;
      --text-muted: #94A3B8;
      --text-dark: #64748B;
      --border-cyan-dim: rgba(0, 240, 255, 0.16);
      --border-cyan-bright: rgba(0, 240, 255, 0.6);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
      --font-display: "DIN Alternate", "Chakra Petch", "Impact", sans-serif;
    }

    * { box-sizing: border-box; }
    body {
      background-color: var(--bg-primary);
      color: var(--text-main);
      font-family: var(--font-stack);
      line-height: 1.75;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
      padding-bottom: 74px;
    }

    a { text-decoration: none; color: inherit; transition: all 0.25s ease; }
    img { max-width: 100%; height: auto; display: block; }

    /* 顶部微型信息条与导航栏 */
    .top-meta-bar {
      background: #06080E;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 0.8rem;
      padding: 6px 0;
      color: var(--text-muted);
    }
    .status-dot {
      width: 7px;
      height: 7px;
      background: #10B981;
      border-radius: 50%;
      display: inline-block;
      margin-right: 6px;
      box-shadow: 0 0 8px #10B981;
    }
    .custom-navbar {
      background: var(--bg-overlay);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-cyan-dim);
      position: sticky;
      top: 0;
      z-index: 1030;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
    }
    .brand-logo {
      font-size: 1.25rem;
      font-weight: 800;
      letter-spacing: 0.5px;
      color: #FFFFFF;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .brand-logo i {
      color: var(--neon-cyan);
      text-shadow: 0 0 10px var(--neon-cyan);
    }
    .nav-link {
      color: var(--text-muted) !important;
      font-weight: 500;
      font-size: 0.95rem;
      padding: 8px 14px !important;
      position: relative;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--neon-cyan) !important;
    }
    .nav-link.active::after {
      content: "";
      position: absolute;
      bottom: -1px;
      left: 14px;
      right: 14px;
      height: 2px;
      background: var(--neon-cyan);
      box-shadow: 0 0 8px var(--neon-cyan);
    }

    /* 按钮规范 */
    .btn-neon-cyan {
      background: var(--neon-cyan);
      color: #05070B;
      font-weight: 700;
      border: 1px solid var(--neon-cyan);
      box-shadow: 0 0 16px rgba(0, 240, 255, 0.35);
      border-radius: var(--radius-sm);
      padding: 9px 20px;
      transition: all 0.25s ease;
    }
    .btn-neon-cyan:hover {
      background: #38f4ff;
      color: #000000;
      box-shadow: 0 0 24px rgba(0, 240, 255, 0.65);
      transform: translateY(-2px);
    }
    .btn-outline-neon {
      background: transparent;
      color: var(--neon-cyan);
      border: 1px solid var(--border-cyan-bright);
      border-radius: var(--radius-sm);
      padding: 9px 20px;
      font-weight: 600;
    }
    .btn-outline-neon:hover {
      background: rgba(0, 240, 255, 0.08);
      color: #FFFFFF;
      border-color: var(--neon-cyan);
      box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
    }

    /* 板块结构与排版 */
    .section-wrap {
      padding: 70px 0;
      position: relative;
    }
    .section-bg-alt {
      background-color: #0D101C;
      border-top: 1px solid rgba(255, 255, 255, 0.04);
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    }
    .section-badge {
      display: inline-block;
      font-size: 0.78rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      color: var(--neon-cyan);
      background: rgba(0, 240, 255, 0.1);
      border: 1px solid var(--border-cyan-dim);
      padding: 4px 12px;
      border-radius: 50px;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 16px;
      color: #FFFFFF;
    }
    .section-desc {
      color: var(--text-muted);
      font-size: 1.02rem;
      max-width: 780px;
      margin-bottom: 40px;
    }

    /* 卡片系统 */
    .dark-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-cyan-dim);
      border-radius: var(--radius-md);
      padding: 24px;
      height: 100%;
      transition: all 0.28s ease;
      position: relative;
    }
    .dark-card:hover {
      border-color: var(--neon-cyan);
      box-shadow: 0 6px 24px rgba(0, 240, 255, 0.15);
      transform: translateY(-3px);
    }
    .card-icon {
      width: 48px;
      height: 48px;
      background: rgba(0, 240, 255, 0.08);
      border: 1px solid var(--border-cyan-dim);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--neon-cyan);
      font-size: 1.4rem;
      margin-bottom: 18px;
    }

    /* Hero */
    .hero-section {
      padding: 90px 0 80px 0;
      background: linear-gradient(180deg, rgba(10, 12, 20, 0.85) 0%, rgba(10, 12, 20, 0.98) 100%),
                  url('/assets/images/4745013cb4e99bb0.png') center/cover no-repeat;
      position: relative;
    }
    .hero-h1 {
      font-size: 3rem;
      font-weight: 900;
      line-height: 1.2;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-lead {
      color: var(--text-muted);
      font-size: 1.1rem;
      line-height: 1.85;
      margin-bottom: 30px;
      max-width: 660px;
    }
    .hero-metric-pill {
      background: rgba(18, 22, 36, 0.8);
      border: 1px solid var(--border-cyan-dim);
      border-radius: var(--radius-sm);
      padding: 12px 18px;
      display: inline-flex;
      align-items: center;
      gap: 12px;
    }

    /* 指标看板 */
    .metric-value {
      font-family: var(--font-display);
      font-size: 2.5rem;
      font-weight: 900;
      color: var(--neon-cyan);
      line-height: 1.1;
      margin-bottom: 4px;
    }

    /* 对比表格 */
    .custom-table {
      width: 100%;
      border-collapse: separate;
      border-spacing: 0;
      border: 1px solid var(--border-cyan-dim);
      border-radius: var(--radius-md);
      overflow: hidden;
      background: var(--bg-surface);
    }
    .custom-table th, .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      vertical-align: middle;
    }
    .custom-table th {
      background: #0E121F;
      color: #FFFFFF;
      font-weight: 700;
    }
    .custom-table tr:last-child td { border-bottom: none; }
    .col-highlight {
      background: rgba(0, 240, 255, 0.04);
      color: #FFFFFF;
      font-weight: 600;
      border-left: 1px solid var(--border-cyan-dim);
      border-right: 1px solid var(--border-cyan-dim);
    }

    /* 手风琴 FAQ */
    .accordion-item {
      background: var(--bg-surface) !important;
      border: 1px solid var(--border-cyan-dim) !important;
      margin-bottom: 12px;
      border-radius: var(--radius-sm) !important;
      overflow: hidden;
    }
    .accordion-button {
      background: var(--bg-surface) !important;
      color: #FFFFFF !important;
      font-weight: 600;
      padding: 18px 20px;
      box-shadow: none !important;
    }
    .accordion-button:not(.collapsed) {
      color: var(--neon-cyan) !important;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }
    .accordion-button::after {
      filter: invert(1);
    }
    .accordion-body {
      background: #0E1322;
      color: var(--text-muted);
      line-height: 1.8;
      padding: 18px 20px;
    }

    /* 浮动吸底转化条 */
    .fixed-floating-cta {
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      z-index: 1020;
      background: rgba(10, 12, 20, 0.95);
      border-top: 1px solid var(--border-cyan-bright);
      backdrop-filter: blur(12px);
      padding: 12px 0;
      box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.7);
    }

    /* 页脚 */
    .footer-section {
      background: #06070B;
      border-top: 1px solid rgba(0, 240, 255, 0.12);
      padding: 60px 0 25px 0;
      font-size: 0.9rem;
      color: var(--text-dark);
    }
    .footer-title {
      color: #FFFFFF;
      font-weight: 700;
      font-size: 1rem;
      margin-bottom: 16px;
    }
    .footer-link-list {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-link-list li { margin-bottom: 10px; }
    .footer-link-list a { color: var(--text-muted); }
    .footer-link-list a:hover { color: var(--neon-cyan); }

    /* 表单组件 */
    .form-control, .form-select {
      background: #0B0E17 !important;
      border: 1px solid var(--border-cyan-dim) !important;
      color: #FFFFFF !important;
      padding: 12px 16px;
      border-radius: var(--radius-sm);
    }
    .form-control:focus, .form-select:focus {
      border-color: var(--neon-cyan) !important;
      box-shadow: 0 0 10px rgba(0, 240, 255, 0.25) !important;
    }

    @media (max-width: 991px) {
      .hero-h1 { font-size: 2.3rem; }
      .section-title { font-size: 1.8rem; }
    }
    @media (max-width: 576px) {
      .hero-h1 { font-size: 1.85rem; }
      .section-wrap { padding: 48px 0; }
    }