/* roulang page: index */
:root {
      --bg-deep: #0A0E27;
      --bg-card: #1A1F3A;
      --gold: #D4AF37;
      --gold-light: #F3E5AB;
      --accent: #A855F7;
      --accent-glow: rgba(168, 85, 247, 0.5);
      --text-primary: #FFFFFF;
      --text-secondary: rgba(255, 255, 255, 0.7);
      --border-subtle: rgba(255, 255, 255, 0.08);
      --radius-lg: 20px;
      --radius-md: 14px;
      --radius-sm: 10px;
      --font-heading: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      --font-number: 'Inter', 'SF Pro Display', sans-serif;
      --font-body: 'Noto Sans SC', sans-serif;
      --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    }

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

    body {
      background-color: var(--bg-deep);
      color: var(--text-primary);
      font-family: var(--font-body);
      line-height: 1.8;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    .container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }

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

    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(10, 14, 39, 0.75);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid var(--border-subtle);
      transition: var(--transition);
    }

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

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
      color: var(--text-primary);
      font-family: var(--font-heading);
      font-weight: 700;
      font-size: 1.5rem;
      letter-spacing: -0.02em;
    }

    .logo-icon {
      font-size: 28px;
      color: var(--gold);
      filter: drop-shadow(0 0 8px rgba(212, 175, 55, 0.6));
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 36px;
      list-style: none;
    }

    .nav-link {
      color: var(--text-secondary);
      text-decoration: none;
      font-weight: 500;
      font-size: 1rem;
      position: relative;
      padding: 6px 0;
      transition: color 0.2s;
      letter-spacing: 0.3px;
    }

    .nav-link::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 50%;
      transform: translateX(-50%) scaleX(0);
      width: 100%;
      height: 2px;
      background: linear-gradient(90deg, var(--gold-light), var(--gold));
      transition: transform 0.25s ease;
      box-shadow: 0 0 12px var(--gold);
    }

    .nav-link:hover, .nav-link.active {
      color: #fff;
    }

    .nav-link:hover::after, .nav-link.active::after {
      transform: translateX(-50%) scaleX(1);
    }

    .desktop-nav {
      display: flex;
    }

    .mobile-bottom-nav {
      display: none;
    }

    @media (max-width: 768px) {
      .desktop-nav {
        display: none;
      }
      .mobile-bottom-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        background: rgba(10, 14, 39, 0.85);
        backdrop-filter: blur(25px);
        -webkit-backdrop-filter: blur(25px);
        border-top: 1px solid var(--border-subtle);
        justify-content: space-around;
        padding: 10px 0 12px;
        z-index: 1000;
      }
      .mobile-tab {
        display: flex;
        flex-direction: column;
        align-items: center;
        color: rgba(255,255,255,0.5);
        text-decoration: none;
        font-size: 12px;
        gap: 4px;
        transition: color 0.2s;
      }
      .mobile-tab i {
        font-size: 20px;
      }
      .mobile-tab.active {
        color: var(--gold);
        text-shadow: 0 0 10px var(--accent-glow);
      }
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-blend-mode: overlay;
      background-color: rgba(10, 14, 39, 0.75);
      padding-top: 80px;
      text-align: center;
      overflow: hidden;
    }

    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 30% 50%, rgba(168,85,247,0.18) 0%, transparent 60%);
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 900px;
      margin: 0 auto;
    }

    .hero h1 {
      font-family: var(--font-heading);
      font-weight: 900;
      font-size: clamp(2.8rem, 7vw, 4.8rem);
      background: linear-gradient(180deg, #F3E5AB 0%, #D4AF37 80%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      text-shadow: 0 0 30px rgba(212, 175, 55, 0.4);
      margin-bottom: 1.5rem;
      letter-spacing: -0.02em;
    }

    .hero-sub {
      font-size: 1.25rem;
      color: var(--text-secondary);
      margin-bottom: 2.5rem;
      max-width: 600px;
      margin-left: auto;
      margin-right: auto;
    }

    .btn-glow {
      background: linear-gradient(135deg, #D4AF37 0%, #A855F7 100%);
      border: none;
      color: white;
      padding: 16px 42px;
      border-radius: 60px;
      font-weight: 700;
      font-size: 1.15rem;
      cursor: pointer;
      box-shadow: 0 0 28px rgba(168, 85, 247, 0.65);
      transition: all 0.3s ease;
      display: inline-flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
      letter-spacing: 0.5px;
    }

    .btn-glow:hover {
      transform: translateY(-3px);
      box-shadow: 0 0 45px rgba(168, 85, 247, 0.9);
    }

    /* 数据看板 */
    .data-dashboard {
      padding: 80px 0 60px;
      background: linear-gradient(180deg, #0A0E27 0%, #11132b 100%);
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 28px;
      text-align: center;
    }

    .stat-item {
      background: rgba(255,255,255,0.03);
      backdrop-filter: blur(16px);
      border: 1px solid rgba(255,255,255,0.05);
      border-radius: var(--radius-lg);
      padding: 36px 16px;
      transition: var(--transition);
    }

    .stat-number {
      font-family: var(--font-number);
      font-weight: 800;
      font-size: 3rem;
      color: var(--gold);
      text-shadow: 0 0 20px rgba(212,175,55,0.5);
    }

    .stat-label {
      color: var(--text-secondary);
      margin-top: 10px;
      font-weight: 500;
    }

    @media (max-width: 768px) {
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
      }
    }

    /* 服务矩阵 非对称 */
    .services {
      padding: 80px 0;
    }

    .section-title {
      font-family: var(--font-heading);
      font-weight: 700;
      font-size: 2.4rem;
      margin-bottom: 16px;
      color: var(--gold-light);
    }

    .service-matrix {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 48px;
    }

    .service-card {
      background: rgba(255,255,255,0.03);
      backdrop-filter: blur(18px);
      border: 1px solid rgba(255,255,255,0.06);
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      transition: all 0.4s;
      position: relative;
      border-left: 4px solid transparent;
    }

    .service-card.featured {
      grid-column: span 2;
      border-color: rgba(212,175,55,0.3);
      box-shadow: 0 0 35px rgba(168,85,247,0.2);
      border-left: 4px solid var(--gold);
    }

    .service-card:hover {
      background: rgba(255,255,255,0.06);
      border-color: rgba(212,175,55,0.5);
      box-shadow: 0 12px 40px rgba(168,85,247,0.25);
    }

    .service-icon {
      font-size: 2.2rem;
      color: var(--gold);
      margin-bottom: 20px;
    }

    @media (max-width: 768px) {
      .service-matrix {
        grid-template-columns: 1fr;
      }
      .service-card.featured {
        grid-column: span 1;
      }
    }

    /* 对比解决方案 */
    .compare-section {
      padding: 80px 0;
      background: rgba(10,14,39,0.9);
    }

    .compare-container {
      display: flex;
      gap: 32px;
      flex-wrap: wrap;
      margin-top: 40px;
    }

    .compare-box {
      flex: 1;
      min-width: 280px;
      background: rgba(26,31,58,0.7);
      backdrop-filter: blur(12px);
      border-radius: var(--radius-lg);
      padding: 32px;
      border: 1px solid var(--border-subtle);
    }

    .compare-box.highlight {
      border-color: var(--gold);
      box-shadow: 0 0 32px rgba(168,85,247,0.3);
    }

    /* FAQ */
    .faq-section {
      padding: 80px 0;
    }

    .faq-grid {
      display: flex;
      gap: 48px;
      margin-top: 40px;
      align-items: flex-start;
    }

    .faq-avatar {
      font-size: 5rem;
      color: var(--accent);
      filter: drop-shadow(0 0 18px var(--accent));
    }

    .accordion {
      flex: 1;
    }

    .faq-item {
      border-bottom: 1px solid var(--border-subtle);
      padding: 18px 0;
    }

    .faq-question {
      font-weight: 700;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: var(--gold-light);
    }

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

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

    @media (max-width: 768px) {
      .faq-grid {
        flex-direction: column;
      }
    }

    /* 表单 CTA */
    .cta-form {
      padding: 80px 0;
      background: linear-gradient(0deg, #0A0E27, #12142e);
    }

    .vip-form {
      background: rgba(20,22,45,0.8);
      backdrop-filter: blur(24px);
      border: 1px solid rgba(212,175,55,0.25);
      border-radius: 28px;
      padding: 48px;
      max-width: 680px;
      margin: 0 auto;
    }

    .input-group {
      display: flex;
      gap: 16px;
      margin: 24px 0;
      flex-wrap: wrap;
    }

    .input-field {
      flex: 1;
      background: rgba(255,255,255,0.05);
      border: 1px solid var(--border-subtle);
      border-radius: 40px;
      padding: 14px 22px;
      color: white;
      outline: none;
    }

    .privacy-lock {
      display: flex;
      align-items: center;
      gap: 8px;
      color: var(--text-secondary);
      font-size: 0.9rem;
    }

    footer {
      text-align: center;
      padding: 40px 0;
      border-top: 1px solid var(--border-subtle);
      color: var(--text-secondary);
    }