/* roulang page: index */
/* 全局设计变量与重置 */
    :root {
      --deep-bg: #060B1F;
      --dark-card-bg: #0A0E27;
      --primary-cyan: #00E5FF;
      --primary-blue: #0095FF;
      --accent-purple: #7B2FFF;
      --success-green: #00F0A8;
      --text-primary: #E0E6FF;
      --text-secondary: #8892B0;
      --border-dim: rgba(255,255,255,0.08);
      --border-glow: rgba(0,229,255,0.25);
      --glass-bg: rgba(255,255,255,0.04);
      --glass-border: rgba(255,255,255,0.06);
      --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
      --shadow-glow: 0 0 20px rgba(0,229,255,0.5);
      --radius-lg: 24px;
      --radius-md: 16px;
      --radius-sm: 12px;
      --radius-btn: 50px;
      --transition-smooth: all 0.25s ease;
    }

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

    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      background-color: var(--deep-bg);
      color: var(--text-primary);
      line-height: 1.5;
      font-size: 16px;
      overflow-x: hidden;
      background-image: radial-gradient(circle at 30% 10%, rgba(0,229,255,0.03) 0%, transparent 60%);
      position: relative;
    }

    /* 细微噪点纹理 */
    body::before {
      content: "";
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(/%23noise)' opacity='0.03'/%3E%3C/svg%3E");
      pointer-events: none;
      z-index: 0;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
      position: relative;
      z-index: 2;
    }

    a {
      color: var(--text-primary);
      text-decoration: none;
      transition: var(--transition-smooth);
    }

    img {
      max-width: 100%;
      display: block;
    }

    h1, h2, h3 {
      font-weight: 700;
      line-height: 1.25;
    }

    h1 { font-size: 48px; }
    h2 { font-size: 36px; }
    h3 { font-size: 24px; font-weight: 600; }

    .section {
      padding: 120px 0;
    }

    @media (max-width: 768px) {
      h1 { font-size: 32px; }
      h2 { font-size: 28px; }
      h3 { font-size: 20px; }
      .section { padding: 80px 0; }
    }

    /* 按钮系统 */
    .btn {
      display: inline-block;
      font-weight: 600;
      border-radius: var(--radius-btn);
      padding: 14px 34px;
      cursor: pointer;
      transition: var(--transition-smooth);
      text-align: center;
      border: none;
      font-size: 16px;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary-cyan), var(--primary-blue));
      color: #0A0E27;
      box-shadow: var(--shadow-glow);
      border: 1px solid transparent;
    }
    .btn-primary:hover {
      box-shadow: 0 0 32px rgba(0,229,255,0.7);
      transform: translateY(-2px);
      color: #0A0E27;
    }
    .btn-outline {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.3);
      color: white;
    }
    .btn-outline:hover {
      border-color: var(--primary-cyan);
      color: var(--primary-cyan);
    }

    /* 导航 */
    .glass-nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(10,14,39,0.6);
      backdrop-filter: blur(30px);
      -webkit-backdrop-filter: blur(30px);
      border-bottom: 1px solid rgba(255,255,255,0.06);
      z-index: 100;
      transition: background 0.3s ease;
      padding: 16px 0;
    }
    .glass-nav.scrolled {
      background: #0A0E27;
      border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .logo {
      font-size: 24px;
      font-weight: 700;
      color: var(--primary-cyan);
      letter-spacing: 1px;
      background: linear-gradient(135deg, #00E5FF, #7B2FFF);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-links a {
      font-weight: 500;
      color: var(--text-secondary);
    }
    .nav-links a:hover {
      color: var(--primary-cyan);
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      color: white;
      font-size: 24px;
      cursor: pointer;
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: #0A0E27;
        flex-direction: column;
        padding: 32px;
        gap: 24px;
        border-bottom: 1px solid var(--border-dim);
      }
      .nav-links.active {
        display: flex;
      }
      .menu-toggle {
        display: block;
      }
    }

    /* Hero 区域 */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      position: relative;
      padding-top: 80px;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-blend-mode: overlay;
      background-color: rgba(6,11,31,0.7);
    }
    .hero-content {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 40px;
      flex-wrap: wrap;
    }
    .hero-text {
      flex: 1 1 500px;
    }
    .hero-visual {
      flex: 1 1 400px;
      position: relative;
    }
    .hero h1 {
      margin-bottom: 20px;
      background: linear-gradient(to right, #fff, #00E5FF);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .hero .subtitle {
      font-size: 20px;
      color: var(--text-secondary);
      margin-bottom: 32px;
    }
    .btn-group {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }

    /* 动态光效粒子 */
    .particle-bg {
      position: absolute;
      top: 0;
      right: 0;
      width: 100%;
      height: 100%;
      overflow: hidden;
      z-index: 0;
    }
    .particle {
      position: absolute;
      background: var(--primary-cyan);
      border-radius: 50%;
      opacity: 0.2;
      animation: float 6s infinite alternate;
    }
    @keyframes float {
      0% { transform: translateY(0px) scale(1); }
      100% { transform: translateY(-30px) scale(1.2); opacity: 0.6; }
    }

    /* 卡片系统 */
    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-card);
      padding: 32px;
      transition: var(--transition-smooth);
      height: 100%;
    }
    .glass-card:hover {
      border-color: rgba(0,229,255,0.3);
      box-shadow: 0 12px 40px rgba(0,0,0,0.6);
    }
    .feature-icon {
      width: 64px;
      height: 64px;
      background: rgba(0,229,255,0.1);
      border-radius: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 24px;
    }

    /* 场景交替 */
    .scenario-row {
      display: flex;
      align-items: center;
      gap: 48px;
      margin-bottom: 80px;
    }
    .scenario-img img {
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-dim);
    }

    /* 案例网格 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .case-card {
      background: rgba(255,255,255,0.03);
      border-radius: var(--radius-md);
      padding: 28px;
      border-left: 4px solid var(--primary-cyan);
    }

    /* 价格卡片高亮 */
    .pricing-highlight {
      border: 2px solid var(--primary-cyan);
      position: relative;
      transform: scale(1.02);
    }
    .badge-recommend {
      position: absolute;
      top: -14px;
      right: 24px;
      background: var(--primary-cyan);
      color: #0A0E27;
      padding: 4px 16px;
      border-radius: 20px;
      font-weight: bold;
      font-size: 14px;
    }

    /* FAQ 手风琴 */
    .faq-item {
      border-bottom: 1px solid var(--border-dim);
      padding: 20px 0;
      cursor: pointer;
    }
    .faq-question {
      font-weight: 600;
      display: flex;
      justify-content: space-between;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      color: var(--text-secondary);
    }

    /* CTA 横幅 */
    .cta-banner {
      background: linear-gradient(135deg, #0A0E27, #1A1F3A);
      text-align: center;
      padding: 80px 0;
      position: relative;
    }
    .cta-glow {
      position: absolute;
      width: 300px;
      height: 300px;
      background: radial-gradient(circle, rgba(0,229,255,0.2) 0%, transparent 70%);
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
    }

    footer {
      background: #04081A;
      padding: 60px 0 30px;
      border-top: 1px solid var(--border-dim);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
    }

    @media (max-width: 768px) {
      .footer-grid, .case-grid { grid-template-columns: 1fr; }
      .scenario-row { flex-direction: column; }
    }