/* roulang page: index */
:root {
      --deep-purple: #1E0A3C;
      --cyan-accent: #00E5BF;
      --pulse-orange: #FF6B35;
      --bg-light: #F8F9FC;
      --white: #FFFFFF;
      --gray-800: #2D2F3A;
      --gray-600: #5A5C6B;
      --gray-400: #9A9CAD;
      --gray-200: #E3E6F0;
      --shadow-sm: 0 8px 30px rgba(30, 10, 60, 0.08);
      --shadow-hover: 0 16px 40px rgba(30, 10, 60, 0.15);
      --radius-card: 20px;
      --radius-btn: 50px;
      --transition: 0.3s ease;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --font-mono: "DIN Alternate", "SF Mono", "Courier New", monospace;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-light);
      color: var(--gray-800);
      line-height: 1.7;
      font-size: 16px;
    }
    img {
      max-width: 100%;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }
    h1, h2, h3 {
      font-weight: 700;
      letter-spacing: -0.02em;
    }
    h1 {
      font-size: 48px;
      line-height: 1.2;
      font-weight: 800;
    }
    h2 {
      font-size: 36px;
      line-height: 1.3;
      font-weight: 700;
    }
    h3 {
      font-size: 22px;
      line-height: 1.4;
      font-weight: 600;
    }
    p {
      color: var(--gray-600);
    }
    .section {
      margin: 100px 0;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 16px 36px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      transition: var(--transition);
      cursor: pointer;
      border: none;
      font-size: 16px;
    }
    .btn-primary {
      background: var(--pulse-orange);
      color: white;
    }
    .btn-primary:hover {
      background: #E55A2B;
      transform: scale(1.03);
      box-shadow: 0 10px 25px rgba(255, 107, 53, 0.3);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--cyan-accent);
      color: var(--cyan-accent);
    }
    .btn-outline:hover {
      background: rgba(0, 229, 191, 0.08);
    }
    /* 导航 */
    .navbar {
      background: white;
      height: 72px;
      display: flex;
      align-items: center;
      position: sticky;
      top: 0;
      z-index: 100;
      box-shadow: 0 4px 20px rgba(0,0,0,0.02);
      backdrop-filter: blur(6px);
      background: rgba(255,255,255,0.9);
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    .logo {
      font-size: 24px;
      font-weight: 800;
      color: var(--deep-purple);
      letter-spacing: 1px;
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-links a {
      font-size: 15px;
      color: var(--gray-800);
      font-weight: 500;
      position: relative;
      padding: 8px 0;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--cyan-accent);
      transition: var(--transition);
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .mobile-nav {
      display: none;
    }
    /* Hero */
    .hero {
      background: linear-gradient(135deg, #1E0A3C 0%, #2B1045 100%);
      color: white;
      padding: 80px 0 100px;
      display: flex;
      align-items: center;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }
    .hero-title {
      font-size: 48px;
      font-weight: 800;
      line-height: 1.2;
    }
    .hero-sub {
      font-size: 18px;
      color: rgba(255,255,255,0.75);
      margin: 24px 0 32px;
      max-width: 450px;
    }
    .data-dashboard {
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(10px);
      border-radius: 32px;
      padding: 28px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      border: 1px solid rgba(255,255,255,0.1);
    }
    .data-badge {
      background: rgba(0, 229, 191, 0.1);
      border-radius: 100px;
      padding: 18px 16px;
      text-align: center;
    }
    .data-number {
      font-family: var(--font-mono);
      font-size: 32px;
      font-weight: 700;
      color: var(--cyan-accent);
      display: block;
    }
    .data-label {
      font-size: 14px;
      color: rgba(255,255,255,0.7);
      margin-top: 5px;
    }
    /* 服务卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
      margin-top: 48px;
    }
    .service-card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .card-icon {
      width: 64px;
      height: 64px;
      background: rgba(0, 229, 191, 0.15);
      border-radius: 20px;
      margin-bottom: 24px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--cyan-accent);
      font-size: 28px;
    }
    .card-link {
      color: var(--cyan-accent);
      font-weight: 600;
      margin-top: 20px;
      display: inline-block;
    }
    /* 对比区 */
    .compare-block {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      margin-top: 48px;
    }
    .timeline-step {
      display: flex;
      gap: 20px;
      margin-bottom: 32px;
    }
    .step-indicator {
      width: 40px;
      height: 40px;
      background: var(--cyan-accent);
      border-radius: 50%;
      color: var(--deep-purple);
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }
    .table-compare {
      background: white;
      border-radius: 20px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .compare-row {
      display: flex;
      border-bottom: 1px solid var(--gray-200);
    }
    .compare-header {
      background: var(--deep-purple);
      color: white;
      font-weight: 700;
    }
    .compare-cell {
      flex: 1;
      padding: 16px 24px;
      font-size: 15px;
    }
    .check-green {
      color: var(--cyan-accent);
      font-weight: 700;
    }
    /* 案例横向滑动 */
    .cases-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding: 16px 0 32px;
      scroll-snap-type: x mandatory;
    }
    .case-card {
      min-width: 340px;
      background: white;
      border-radius: 24px;
      box-shadow: var(--shadow-sm);
      scroll-snap-align: start;
      transition: var(--transition);
    }
    .case-card:hover {
      transform: translateY(-4px);
    }
    .cover-img {
      width: 100%;
      height: 180px;
      background: #d9dce6;
      border-radius: 24px 24px 0 0;
    }
    .case-body {
      padding: 20px;
    }
    .metric-big {
      font-family: var(--font-mono);
      font-size: 28px;
      color: var(--pulse-orange);
      font-weight: 700;
    }
    /* FAQ */
    .faq-item {
      background: white;
      border-radius: 16px;
      margin-bottom: 16px;
      border-left: 4px solid var(--cyan-accent);
      transition: var(--transition);
      cursor: pointer;
    }
    .faq-question {
      padding: 20px 28px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
    }
    .faq-answer {
      padding: 0 28px 20px;
      color: var(--gray-600);
      display: none;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    /* 表单深色区 */
    .cta-dark {
      background: linear-gradient(135deg, #1E0A3C, #2A1145);
      border-radius: 40px;
      padding: 64px 48px;
      margin-top: 40px;
      color: white;
    }
    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      margin-top: 32px;
    }
    input, select {
      padding: 16px 20px;
      border-radius: 12px;
      border: none;
      background: rgba(255,255,255,0.1);
      color: white;
      width: 100%;
      font-size: 16px;
    }
    input:focus, select:focus {
      outline: 2px solid var(--cyan-accent);
    }
    .trust-badge {
      margin-top: 18px;
      font-size: 14px;
      display: flex;
      gap: 24px;
    }
    footer {
      background: var(--deep-purple);
      color: rgba(255,255,255,0.7);
      padding: 64px 0 32px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 40px;
    }
    .footer-col h4 {
      color: var(--cyan-accent);
      margin-bottom: 20px;
    }
    .footer-col a {
      display: block;
      color: #ccc;
      margin-bottom: 12px;
    }
    @media (max-width: 1024px) {
      .hero-grid, .compare-block {
        grid-template-columns: 1fr;
      }
      .services-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      h1 { font-size: 32px; }
      h2 { font-size: 26px; }
      .container { padding: 0 20px; }
      .nav-links { display: none; }
      .mobile-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: white;
        padding: 12px 24px;
        justify-content: space-around;
        box-shadow: 0 -adaption 15px rgba(0,0,0,0.05);
        z-index: 99;
      }
      .services-grid, .form-grid {
        grid-template-columns: 1fr;
      }
      .data-dashboard {
        grid-template-columns: 1fr 1fr;
      }
      .hero {
        padding: 48px 0;
      }
    }