/* roulang page: index */
:root {
      --primary-deep: #0A0E27;
      --primary-bg: #1A1F3A;
      --cyan: #00F0FF;
      --orange: #FF6B35;
      --glass-bg: rgba(255, 255, 255, 0.05);
      --glass-border: rgba(0, 240, 255, 0.15);
      --text-primary: rgba(255, 255, 255, 0.92);
      --text-secondary: rgba(255, 255, 255, 0.7);
      --text-dim: rgba(255, 255, 255, 0.5);
      --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.4);
      --shadow-glow-hover: 0 0 30px rgba(0, 240, 255, 0.7);
      --radius-lg: 16px;
      --radius-btn: 50px;
      --radius-md: 12px;
      --transition: 0.3s ease;
    }

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

    body {
      font-family: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
      background: var(--primary-deep);
      color: var(--text-primary);
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      background: rgba(10, 14, 39, 0.75);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(0, 240, 255, 0.15);
      z-index: 1000;
      display: flex;
      align-items: center;
      transition: background 0.3s;
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      text-decoration: none;
      color: white;
      font-weight: 700;
      font-size: 20px;
    }

    .logo-icon {
      position: relative;
      width: 28px;
      height: 28px;
      background: var(--orange);
      border-radius: 50% 50% 50% 0;
      transform: rotate(-15deg);
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 0 12px rgba(255, 107, 53, 0.5);
    }

    .logo-icon::after {
      content: "";
      width: 8px;
      height: 8px;
      background: var(--cyan);
      border-radius: 50%;
      position: absolute;
      top: 30%;
      left: 55%;
      box-shadow: 0 0 6px var(--cyan);
    }

    .nav-menu {
      display: flex;
      gap: 32px;
      list-style: none;
    }

    .nav-menu a {
      text-decoration: none;
      color: var(--text-secondary);
      font-size: 15px;
      font-weight: 500;
      position: relative;
      padding: 8px 0;
      transition: color 0.2s;
    }

    .nav-menu a::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 0;
      height: 2px;
      background: var(--cyan);
      box-shadow: 0 0 8px var(--cyan);
      transition: width 0.25s ease;
    }

    .nav-menu a:hover {
      color: var(--cyan);
    }

    .nav-menu a:hover::after {
      width: 24px;
    }

    .btn-cta-small {
      background: var(--cyan);
      color: #0A0E27;
      font-weight: 600;
      padding: 0 24px;
      height: 40px;
      border-radius: var(--radius-btn);
      display: flex;
      align-items: center;
      justify-content: center;
      text-decoration: none;
      box-shadow: 0 0 16px rgba(0, 240, 255, 0.6);
      transition: all 0.25s;
    }

    .btn-cta-small:hover {
      box-shadow: 0 0 24px rgba(0, 240, 255, 0.9);
      background: #33f5ff;
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: transparent;
      border: none;
    }

    .hamburger span {
      width: 26px;
      height: 2px;
      background: white;
      border-radius: 2px;
      transition: 0.2s;
    }

    /* 移动端菜单 */
    .mobile-menu {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      background: #0A0E27;
      backdrop-filter: blur(20px);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 32px;
      z-index: 999;
      transform: translateX(100%);
      transition: transform 0.3s ease;
    }

    .mobile-menu.active {
      transform: translateX(0);
    }

    .mobile-menu a {
      color: white;
      font-size: 22px;
      text-decoration: none;
    }

    .close-menu {
      position: absolute;
      top: 24px;
      right: 24px;
      background: none;
      border: none;
      color: white;
      font-size: 28px;
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      padding-top: 72px;
      background: radial-gradient(circle at 30% 40%, #1a2a4a 0%, #0A0E27 80%);
      position: relative;
      overflow: hidden;
    }

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

    .hero-title {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 24px;
    }

    .hero-sub {
      font-size: 18px;
      color: var(--text-secondary);
      margin-bottom: 32px;
    }

    .store-btns {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .store-btn {
      border: 1px solid rgba(255,255,255,0.2);
      background: rgba(255,255,255,0.05);
      padding: 12px 24px;
      border-radius: 40px;
      color: white;
      text-decoration: none;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .data-cards {
      display: flex;
      flex-direction: column;
      gap: 20px;
      position: relative;
    }

    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: 0 12px 32px rgba(0,0,0,0.5);
    }

    .stat-number {
      font-size: 40px;
      font-weight: 700;
      font-family: "Inter", sans-serif;
      color: var(--cyan);
    }

    .orange-number {
      color: var(--orange);
    }

    /* 板块通用 */
    section {
      padding: 100px 0;
    }

    .section-title {
      font-size: 36px;
      font-weight: 600;
      text-align: center;
      margin-bottom: 16px;
    }

    .section-desc {
      text-align: center;
      color: var(--text-dim);
      max-width: 600px;
      margin: 0 auto 48px;
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: var(--glass-bg);
      backdrop-filter: blur(16px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-lg);
      padding: 32px;
      transition: all 0.3s ease;
    }

    .service-card:hover {
      background: rgba(255,255,255,0.08);
      border-color: rgba(0,240,255,0.4);
      transform: translateY(-4px);
      box-shadow: 0 16px 40px rgba(0,0,0,0.6);
    }

    .icon-placeholder {
      width: 48px;
      height: 48px;
      margin-bottom: 20px;
    }

    .comparison {
      background: #111633;
      border-radius: 24px;
      padding: 48px;
    }

    .table-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      padding: 16px 0;
      border-bottom: 1px solid rgba(255,255,255,0.06);
    }

    .faq-item {
      border-bottom: 1px solid rgba(255,255,255,0.08);
      padding: 20px 0;
    }

    .faq-question {
      display: flex;
      justify-content: space-between;
      font-weight: 600;
      cursor: pointer;
    }

    .cta-full {
      background: #0A0E27;
      text-align: center;
    }

    .btn-glow {
      background: linear-gradient(135deg, #00F0FF, #00B4D8);
      border: none;
      color: #0A0E27;
      font-weight: 700;
      font-size: 18px;
      padding: 16px 48px;
      border-radius: 50px;
      box-shadow: 0 0 28px rgba(0,240,255,0.6);
      cursor: pointer;
      transition: 0.2s;
    }

    .btn-glow:hover {
      box-shadow: 0 0 40px rgba(0,240,255,0.9);
    }

    footer {
      background: #0A0E27;
      padding: 60px 0 30px;
      border-top: 1px solid rgba(0,240,255,0.15);
    }

    @media (max-width: 1024px) {
      .grid-3 { grid-template-columns: repeat(2,1fr); }
    }

    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .hamburger { display: flex; }
      .hero-grid { grid-template-columns: 1fr; }
      .hero-title { font-size: 32px; }
      .grid-3 { grid-template-columns: 1fr; }
      .comparison { padding: 24px; }
      .section-title { font-size: 28px; }
    }