/* roulang page: index */
:root {
      --primary-start: #7B2FFF;
      --primary-end: #B84DFF;
      --accent: #00F0FF;
      --bg-deep: #0B0C10;
      --bg-card: rgba(31, 32, 48, 0.7);
      --card-border: rgba(123, 47, 255, 0.25);
      --text-primary: #F0F0FF;
      --text-secondary: #B0B0CC;
      --text-muted: #78789C;
      --radius-card: 16px;
      --radius-btn: 30px;
      --shadow-glow: 0 0 18px rgba(0, 240, 255, 0.5);
      --font-heading: 'Poppins', 'Montserrat', sans-serif;
      --font-body: 'Inter', 'Noto Sans SC', sans-serif;
    }

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

    body {
      font-family: var(--font-body);
      background: var(--bg-deep);
      color: var(--text-primary);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      background-image: radial-gradient(circle at 30% 20%, rgba(123, 47, 255, 0.08) 0%, transparent 40%);
      overflow-x: hidden;
    }

    .container {
      max-width: 1320px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航栏 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(11, 12, 16, 0.85);
      backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(123, 47, 255, 0.25);
      transition: all 0.3s ease;
    }

    .brand-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 0;
      transition: padding 0.3s;
    }

    .logo {
      font-family: var(--font-heading);
      font-weight: 800;
      font-size: 1.8rem;
      background: linear-gradient(135deg, var(--primary-start), var(--primary-end));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: -0.5px;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .logo i {
      background: none;
      -webkit-text-fill-color: var(--accent);
      font-size: 1.9rem;
    }

    .btn-register {
      background: linear-gradient(135deg, var(--primary-start), var(--primary-end));
      border: none;
      color: white;
      font-weight: 600;
      padding: 12px 28px;
      border-radius: 30px;
      font-size: 0.95rem;
      letter-spacing: 0.5px;
      cursor: pointer;
      box-shadow: 0 0 18px rgba(0, 240, 255, 0.45);
      transition: all 0.3s;
      display: flex;
      align-items: center;
      gap: 6px;
      border: 1px solid rgba(255,255,255,0.2);
    }

    .btn-register:hover {
      box-shadow: 0 0 28px rgba(0, 240, 255, 0.8);
      transform: scale(1.02);
      background: linear-gradient(135deg, #8a3fff, #c05eff);
    }

    .channel-row {
      display: flex;
      gap: 32px;
      padding: 8px 0 12px;
      overflow-x: auto;
      white-space: nowrap;
      scrollbar-width: none;
      -ms-overflow-style: none;
      border-top: 1px solid rgba(123, 47, 255, 0.15);
    }

    .channel-row::-webkit-scrollbar {
      display: none;
    }

    .channel-link {
      color: var(--text-secondary);
      text-decoration: none;
      font-weight: 500;
      font-size: 0.95rem;
      position: relative;
      padding-bottom: 6px;
      transition: color 0.2s;
      letter-spacing: 0.3px;
    }

    .channel-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: var(--accent);
      transform: scaleX(0);
      transition: transform 0.3s;
      border-radius: 2px;
    }

    .channel-link:hover,
    .channel-link.active {
      color: var(--accent);
    }

    .channel-link.active::after {
      transform: scaleX(1);
    }

    .menu-toggle {
      display: none;
      background: transparent;
      border: none;
      color: var(--accent);
      font-size: 1.8rem;
      cursor: pointer;
    }

    @media (max-width: 768px) {
      .channel-row {
        display: none;
        flex-direction: column;
        background: rgba(11, 12, 16, 0.95);
        padding: 20px;
        gap: 18px;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        border-bottom: 1px solid var(--card-border);
      }
      .channel-row.open {
        display: flex;
      }
      .menu-toggle {
        display: block;
      }
      .brand-row {
        padding: 10px 0;
      }
      .logo {
        font-size: 1.5rem;
      }
    }

    /* 英雄区 */
    .hero {
      padding: 160px 0 100px;
      position: relative;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-blend-mode: overlay;
      background-color: rgba(11, 12, 16, 0.75);
      display: flex;
      align-items: center;
      min-height: 80vh;
    }

    .hero-content {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 40px;
    }

    .hero-text {
      flex: 1 1 400px;
    }

    .hero h1 {
      font-family: var(--font-heading);
      font-size: 3.2rem;
      font-weight: 800;
      line-height: 1.2;
      background: linear-gradient(to right, #fff, #d9c8ff);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 20px;
    }

    .hero-sub {
      font-size: 1.2rem;
      color: var(--text-secondary);
      margin-bottom: 32px;
      max-width: 500px;
    }

    .btn-group {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary-start), var(--primary-end));
      border: none;
      padding: 14px 36px;
      border-radius: 30px;
      font-weight: 600;
      color: white;
      box-shadow: 0 0 20px rgba(0, 240, 255, 0.6);
      cursor: pointer;
      transition: 0.3s;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .btn-primary:hover {
      box-shadow: 0 0 35px var(--accent);
      transform: translateY(-3px);
    }

    .btn-ghost {
      background: transparent;
      border: 1px solid var(--accent);
      color: var(--accent);
      padding: 14px 36px;
      border-radius: 30px;
      font-weight: 500;
      cursor: pointer;
      transition: 0.3s;
    }

    .btn-ghost:hover {
      background: var(--accent);
      color: #0B0C10;
    }

    .glass-panel {
      background: var(--bg-card);
      backdrop-filter: blur(14px);
      border: 1px solid var(--card-border);
      border-radius: 24px;
      padding: 24px;
      color: var(--accent);
      font-weight: 600;
      box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    }

    .live-data {
      font-size: 2rem;
      font-family: var(--font-heading);
      letter-spacing: 1px;
    }

    @media (max-width: 768px) {
      .hero h1 {
        font-size: 2.3rem;
      }
    }

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

    .section-title {
      font-family: var(--font-heading);
      font-size: 2.4rem;
      font-weight: 700;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }

    .section-desc {
      color: var(--text-secondary);
      margin-bottom: 48px;
      font-size: 1.1rem;
    }

    /* 服务卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr;
      gap: 24px;
    }

    .service-card {
      background: var(--bg-card);
      backdrop-filter: blur(12px);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-card);
      padding: 32px;
      transition: all 0.3s ease;
    }

    .service-card:hover {
      border-color: var(--accent);
      transform: translateY(-6px);
      box-shadow: 0 0 25px rgba(0,240,255,0.2);
    }

    .icon-glow {
      font-size: 2.2rem;
      color: var(--accent);
      margin-bottom: 18px;
    }

    .service-card h3 {
      font-family: var(--font-heading);
      font-size: 1.5rem;
      margin-bottom: 10px;
    }

    @media (max-width: 992px) {
      .services-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 600px) {
      .services-grid {
        grid-template-columns: 1fr;
      }
    }

    .stats-row {
      display: flex;
      justify-content: space-around;
      gap: 30px;
      flex-wrap: wrap;
      text-align: center;
    }

    .stat-number {
      font-size: 3rem;
      font-weight: 800;
      background: linear-gradient(135deg, var(--accent), #fff);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .case-logo-wall {
      display: flex;
      flex-wrap: wrap;
      gap: 25px;
      align-items: center;
      margin-bottom: 40px;
    }

    .logo-placeholder {
      background: rgba(255,255,255,0.05);
      padding: 12px 20px;
      border-radius: 30px;
      color: var(--text-muted);
      font-weight: 600;
    }

    .solution-row {
      display: flex;
      gap: 30px;
      align-items: center;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }

    .solution-img {
      flex: 1 1 280px;
      background: rgba(31,32,48,0.7);
      border-radius: 20px;
      overflow: hidden;
    }

    .solution-img img {
      width: 100%;
      display: block;
    }

    .faq-item {
      border-bottom: 1px solid rgba(123,47,255,0.25);
      padding: 20px 0;
    }

    .faq-question {
      display: flex;
      align-items: center;
      gap: 15px;
      font-weight: 600;
      cursor: pointer;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      color: var(--text-secondary);
      padding-left: 35px;
    }

    .faq-item.open .faq-answer {
      max-height: 200px;
      padding-top: 12px;
    }

    .cta-section {
      background: linear-gradient(145deg, #0f0f1a, #1a1025);
      text-align: center;
    }

    footer {
      background: #05060A;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
    }