/* roulang page: index */
:root {
      --primary-green: #00E676;
      --primary-cyan: #00B0FF;
      --deep-black: #0A0E17;
      --deep-blue: #0B1A2C;
      --accent-orange: #FF6D00;
      --card-bg: rgba(22, 34, 49, 0.8);
      --card-border: rgba(0, 176, 255, 0.25);
      --text-light: #E0E8F0;
      --text-dim: #B0C4DE;
      --text-muted: #6A7A8E;
      --gradient-main: linear-gradient(135deg, var(--primary-green) 0%, var(--primary-cyan) 100%);
      --gradient-reverse: linear-gradient(135deg, var(--primary-cyan) 0%, var(--primary-green) 100%);
      --radius-lg: 24px;
      --radius-md: 16px;
      --radius-sm: 10px;
      --radius-pill: 50px;
      --shadow-card: 0 8px 32px rgba(0, 230, 118, 0.1);
      --shadow-glow: 0 0 24px rgba(0, 176, 255, 0.4);
      --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", "Inter", sans-serif;
      --font-mono: "DIN Alternate", "Roboto Mono", "Menlo", monospace;
      --transition: all 0.25s ease;
    }

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

    body {
      background-color: var(--deep-black);
      color: var(--text-light);
      font-family: var(--font-sans);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

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

    /* 沉浸式导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(10, 14, 23, 0.75);
      backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(0, 176, 255, 0.2);
      transition: var(--transition);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.5rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: white;
      text-decoration: none;
    }

    .logo-icon {
      width: 36px;
      height: 36px;
      background: var(--gradient-main);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: #0A0E17;
    }

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

    .nav-link {
      color: var(--text-dim);
      text-decoration: none;
      font-weight: 500;
      font-size: 0.95rem;
      transition: var(--transition);
      position: relative;
      padding: 6px 0;
    }

    .nav-link:hover,
    .nav-link.active {
      color: var(--primary-green);
    }

    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--gradient-main);
      transition: width 0.25s ease;
    }

    .nav-link:hover::after,
    .nav-link.active::after {
      width: 100%;
    }

    .mobile-toggle {
      display: none;
      flex-direction: column;
      gap: 6px;
      cursor: pointer;
      background: transparent;
      border: none;
      padding: 8px;
    }

    .mobile-toggle span {
      display: block;
      width: 26px;
      height: 2px;
      background: white;
      transition: var(--transition);
    }

    /* Hero */
    .hero {
      padding: 160px 0 100px;
      display: flex;
      align-items: center;
      gap: 60px;
      position: relative;
      overflow: hidden;
    }

    .hero-content {
      flex: 1;
    }

    .hero-badge {
      display: inline-block;
      background: rgba(0, 230, 118, 0.15);
      color: var(--primary-green);
      font-weight: 600;
      font-size: 0.9rem;
      padding: 6px 18px;
      border-radius: 30px;
      margin-bottom: 24px;
      border: 1px solid rgba(0, 230, 118, 0.3);
    }

    .hero h1 {
      font-size: clamp(2.5rem, 6vw, 4rem);
      font-weight: 800;
      letter-spacing: -0.5px;
      line-height: 1.2;
      margin-bottom: 20px;
      background: var(--gradient-main);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .hero-sub {
      font-size: 1.2rem;
      color: var(--text-dim);
      margin-bottom: 32px;
      max-width: 540px;
    }

    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .btn {
      padding: 14px 32px;
      border-radius: var(--radius-pill);
      font-weight: 700;
      letter-spacing: 0.5px;
      text-decoration: none;
      transition: var(--transition);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      border: none;
      cursor: pointer;
    }

    .btn-primary {
      background: var(--gradient-main);
      color: #0A0E17;
      box-shadow: 0 6px 18px rgba(0, 230, 118, 0.3);
    }

    .btn-primary:hover {
      background: var(--gradient-reverse);
      box-shadow: 0 10px 28px rgba(0, 230, 118, 0.5);
      transform: translateY(-2px);
    }

    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--primary-cyan);
      color: var(--primary-cyan);
    }

    .btn-outline:hover {
      background: rgba(0, 176, 255, 0.15);
      border-color: var(--primary-green);
      color: var(--primary-green);
    }

    .hero-visual {
      flex: 1;
      display: flex;
      justify-content: center;
      position: relative;
    }

    .dashboard-mock {
      width: 100%;
      max-width: 480px;
      background: var(--card-bg);
      backdrop-filter: blur(12px);
      border-radius: var(--radius-lg);
      border: 1px solid var(--card-border);
      padding: 20px;
      box-shadow: var(--shadow-card);
    }

    .dashboard-mock img {
      width: 100%;
      border-radius: 14px;
      display: block;
    }

    .live-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(255, 109, 0, 0.2);
      color: var(--accent-orange);
      font-weight: 600;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 0.8rem;
      margin-bottom: 12px;
    }

    /* 板块通用 */
    .section {
      padding: 90px 0;
    }

    .section-header {
      text-align: center;
      margin-bottom: 60px;
    }

    .section-header h2 {
      font-size: 2.2rem;
      font-weight: 700;
      margin-bottom: 12px;
    }

    .decorator {
      width: 70px;
      height: 4px;
      background: var(--gradient-main);
      margin: 0 auto;
      border-radius: 4px;
    }

    /* Bento 功能网格 */
    .bento-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .bento-card {
      background: var(--card-bg);
      backdrop-filter: blur(10px);
      border-radius: var(--radius-lg);
      padding: 28px 22px;
      border: 1px solid var(--card-border);
      transition: var(--transition);
    }

    .bento-card:hover {
      border-color: var(--primary-green);
      box-shadow: 0 12px 36px rgba(0, 230, 118, 0.2);
      transform: translateY(-5px);
    }

    .bento-card.large {
      grid-column: span 2;
    }

    .bento-icon {
      font-size: 2rem;
      margin-bottom: 16px;
      color: var(--primary-green);
    }

    .bento-card h3 {
      font-size: 1.4rem;
      font-weight: 700;
      margin-bottom: 10px;
    }

    .bento-card p {
      color: var(--text-dim);
      font-size: 0.95rem;
      margin-bottom: 18px;
    }

    .text-link {
      color: var(--primary-cyan);
      font-weight: 600;
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 场景沉浸 */
    .scene-band {
      background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      padding: 80px 60px;
      margin-top: 40px;
    }

    .scene-overlay {
      position: absolute;
      inset: 0;
      background: rgba(10, 14, 23, 0.8);
      backdrop-filter: blur(4px);
    }

    .scene-content {
      position: relative;
      z-index: 2;
      display: flex;
      gap: 40px;
      align-items: center;
    }

    .scene-text h2 {
      font-size: 2rem;
      font-weight: 700;
      margin-bottom: 16px;
    }

    /* 数据徽章墙 */
    .badge-wall {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding: 20px 0;
      scrollbar-width: thin;
    }

    .stat-badge {
      min-width: 180px;
      background: var(--card-bg);
      backdrop-filter: blur(8px);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      text-align: center;
      border: 1px solid var(--card-border);
    }

    .stat-number {
      font-family: var(--font-mono);
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--primary-cyan);
    }

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

    .testimonial-card {
      background: var(--card-bg);
      backdrop-filter: blur(10px);
      border-radius: var(--radius-lg);
      padding: 28px;
      border: 1px solid var(--card-border);
    }

    .user-avatar {
      width: 48px;
      height: 48px;
      background: var(--gradient-main);
      border-radius: 50%;
      margin-bottom: 16px;
    }

    /* FAQ */
    .faq-item {
      background: var(--card-bg);
      backdrop-filter: blur(8px);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      border: 1px solid var(--card-border);
    }

    .faq-question {
      padding: 20px 24px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      padding: 0 24px;
      color: var(--text-dim);
    }

    .faq-item.open .faq-answer {
      max-height: 200px;
      padding-bottom: 20px;
    }

    /* 页脚 */
    .footer {
      background: #05070A;
      padding: 60px 0 24px;
      border-top: 2px solid rgba(0, 176, 255, 0.3);
    }

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

    @media (max-width: 1024px) {
      .bento-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .testimonial-grid {
        grid-template-columns: 1fr;
      }
      .hero {
        flex-direction: column;
        text-align: center;
      }
      .hero-sub {
        margin-left: auto;
        margin-right: auto;
      }
      .btn-group {
        justify-content: center;
      }
    }

    @media (max-width: 768px) {
      .nav-menu {
        display: none;
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: rgba(10, 14, 23, 0.95);
        flex-direction: column;
        padding: 32px;
        backdrop-filter: blur(20px);
      }
      .nav-menu.active {
        display: flex;
      }
      .mobile-toggle {
        display: flex;
      }
      .container {
        padding: 0 20px;
      }
      .bento-grid {
        grid-template-columns: 1fr;
      }
      .bento-card.large {
        grid-column: span 1;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .scene-content {
        flex-direction: column;
      }
    }