/* roulang page: index */
* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    :root {
      --deep-blue: #0A192F;
      --card-bg: #112240;
      --electric-cyan: #00E5FF;
      --cyan-hover: #33EAFF;
      --white: #FFFFFF;
      --light-gray: #B0C4DE;
      --glass-bg: rgba(255, 255, 255, 0.05);
      --glass-border: rgba(255, 255, 255, 0.1);
      --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.25);
      --success-green: #00B578;
      --warning-orange: #FF9F0A;
      --radius-md: 12px;
      --radius-lg: 20px;
      --radius-xl: 28px;
      --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', sans-serif;
      --transition: all 0.25s ease;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--deep-blue);
      color: var(--white);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      padding: 16px 0;
      transition: var(--transition);
      background-color: transparent;
    }
    .navbar.scrolled {
      background: rgba(10, 25, 47, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      box-shadow: 0 4px 20px rgba(0,0,0,0.3);
      padding: 12px 0;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.6rem;
      letter-spacing: 0.5px;
      color: var(--white);
      text-decoration: none;
    }
    .logo i {
      font-size: 2rem;
      color: var(--electric-cyan);
      filter: drop-shadow(0 0 8px rgba(0,229,255,0.6));
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-links a {
      color: var(--light-gray);
      text-decoration: none;
      font-weight: 500;
      font-size: 1rem;
      transition: var(--transition);
      position: relative;
      padding-bottom: 4px;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--electric-cyan);
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--electric-cyan);
      transition: width 0.2s ease;
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      color: var(--white);
      font-size: 1.8rem;
      cursor: pointer;
    }
    @media (max-width: 768px) {
      .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100vh;
        background: rgba(10, 25, 47, 0.96);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        gap: 40px;
        transition: right 0.3s ease;
        padding: 40px;
      }
      .nav-links.active {
        right: 0;
      }
      .menu-toggle {
        display: block;
        z-index: 1001;
      }
    }
    /* 首屏 */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      padding-top: 80px;
    }
    .hero::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background: rgba(10, 25, 47, 0.75);
      backdrop-filter: blur(2px);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 800px;
    }
    .hero h1 {
      font-size: clamp(2.6rem, 5vw, 3.6rem);
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 20px;
      text-shadow: 0 0 18px rgba(0,229,255,0.25);
    }
    .hero .subtitle {
      font-size: 1.25rem;
      color: var(--light-gray);
      margin-bottom: 36px;
      max-width: 600px;
    }
    .btn-primary {
      background: var(--electric-cyan);
      color: var(--deep-blue);
      font-weight: 600;
      padding: 14px 38px;
      border-radius: 40px;
      text-decoration: none;
      display: inline-block;
      transition: var(--transition);
      border: none;
      cursor: pointer;
      font-size: 1.1rem;
      box-shadow: 0 4px 16px rgba(0,229,255,0.4);
    }
    .btn-primary:hover {
      background: #4DF0FF;
      box-shadow: 0 0 28px rgba(0,229,255,0.7);
      transform: translateY(-2px);
    }
    .btn-secondary {
      background: transparent;
      border: 1.5px solid var(--electric-cyan);
      color: var(--electric-cyan);
      font-weight: 600;
      padding: 12px 32px;
      border-radius: 40px;
      text-decoration: none;
      transition: var(--transition);
      margin-left: 16px;
    }
    .btn-secondary:hover {
      background: var(--electric-cyan);
      color: var(--deep-blue);
    }
    /* 通用板块 */
    section {
      padding: 90px 0;
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      margin-bottom: 16px;
      text-align: center;
    }
    .section-subtitle {
      color: var(--light-gray);
      text-align: center;
      max-width: 650px;
      margin: 0 auto 50px;
      font-size: 1.1rem;
    }
    /* 解决方案 痛点-方案对比 */
    .solution-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: start;
    }
    .pain-list {
      background: rgba(255,255,255,0.03);
      border-radius: var(--radius-lg);
      padding: 28px;
    }
    .pain-item {
      display: flex;
      gap: 16px;
      margin-bottom: 28px;
      align-items: flex-start;
    }
    .pain-item i {
      color: var(--warning-orange);
      font-size: 1.5rem;
      margin-top: 4px;
    }
    .solution-cards {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-lg);
      padding: 26px;
      box-shadow: var(--glass-shadow);
    }
    .glass-card h3 {
      font-size: 1.4rem;
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .glass-card i {
      color: var(--electric-cyan);
    }
    @media (max-width: 768px) {
      .solution-grid {
        grid-template-columns: 1fr;
      }
    }
    /* 数据卡片 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .stat-card {
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      padding: 36px 20px;
      text-align: center;
      border: 1px solid rgba(255,255,255,0.08);
    }
    .stat-number {
      font-size: 3.2rem;
      font-weight: 700;
      background: linear-gradient(135deg, #00E5FF, #4E6EF2);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 8px;
    }
    /* 证言轮播区 */
    .testimonial-grid {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 16px;
      scroll-snap-type: x mandatory;
    }
    .testimonial-card {
      min-width: 300px;
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(8px);
      border-radius: var(--radius-lg);
      padding: 28px;
      scroll-snap-align: start;
      border: 1px solid rgba(255,255,255,0.15);
    }
    .testimonial-card img {
      width: 50px;
      height: 50px;
      object-fit: cover;
      border-radius: 50%;
      margin-bottom: 15px;
      border: 2px solid var(--electric-cyan);
    }
    /* FAQ */
    .faq-item {
      border-bottom: 1px solid rgba(255,255,255,0.15);
      padding: 18px 0;
      cursor: pointer;
    }
    .faq-question {
      display: flex;
      align-items: center;
      gap: 14px;
      font-weight: 600;
      font-size: 1.2rem;
    }
    .faq-question i {
      color: var(--electric-cyan);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-in-out;
      color: var(--light-gray);
      padding-left: 36px;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      margin-top: 14px;
    }
    /* 联系表单 */
    .contact-form {
      background: rgba(255,255,255,0.04);
      backdrop-filter: blur(12px);
      border-radius: var(--radius-xl);
      padding: 40px;
      max-width: 680px;
      margin: 0 auto;
      border: 1px solid rgba(255,255,255,0.12);
    }
    .input-group {
      margin-bottom: 20px;
    }
    input, textarea {
      width: 100%;
      background: rgba(255,255,255,0.08);
      border: 1px solid rgba(255,255,255,0.2);
      border-radius: 30px;
      padding: 14px 24px;
      color: white;
      font-size: 1rem;
      outline: none;
      transition: 0.2s;
    }
    input:focus, textarea:focus {
      border-color: var(--electric-cyan);
      box-shadow: 0 0 0 3px rgba(0,229,255,0.35);
    }
    footer {
      background: #051020;
      padding: 48px 0;
      text-align: center;
      color: var(--light-gray);
    }
    @media (max-width: 768px) {
      .stats-grid { grid-template-columns: 1fr; }
    }