/* roulang page: index */
:root {
      --primary: #A855F7;
      --primary-glow: rgba(168, 85, 247, 0.6);
      --secondary: #F97316;
      --secondary-glow: rgba(249, 115, 22, 0.5);
      --bg-deep: #0B0B0F;
      --bg-card: #1E1E28;
      --bg-section: #16161D;
      --text-white: #FFFFFF;
      --text-gray: #A1A1AA;
      --text-light: #D4D4D8;
      --border-dim: rgba(168, 85, 247, 0.25);
      --border-active: rgba(168, 85, 247, 0.7);
      --radius-card: 24px;
      --radius-btn: 12px;
      --radius-badge: 8px;
      --radius-sm: 12px;
      --shadow-glow: 0 0 24px rgba(168, 85, 247, 0.4);
      --shadow-orange: 0 0 18px rgba(249, 115, 22, 0.5);
      --transition: 0.3s cubic-bezier(0.2, 0.9, 0.4, 1);
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
      background-color: var(--bg-deep);
    }

    body {
      font-family: var(--font-sans);
      background: var(--bg-deep);
      color: var(--text-gray);
      line-height: 1.7;
      font-size: 16px;
      font-weight: 400;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

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

    button, input, textarea {
      font-family: inherit;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
      width: 100%;
    }

    /* 导航栏 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      display: flex;
      align-items: center;
      justify-content: center;
      z-index: 1000;
      transition: background var(--transition), backdrop-filter var(--transition);
      background: transparent;
      backdrop-filter: blur(0px);
    }

    .navbar.scrolled {
      background: rgba(11, 11, 15, 0.92);
      backdrop-filter: blur(12px);
      box-shadow: 0 4px 20px rgba(0,0,0,0.5);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      max-width: 1280px;
      padding: 0 24px;
      position: relative;
    }

    .logo {
      font-size: 24px;
      font-weight: 800;
      color: var(--text-white);
      letter-spacing: 1px;
      position: absolute;
      left: 50%;
      transform: translateX(-50%);
      white-space: nowrap;
      z-index: 10;
    }

    .nav-left, .nav-right {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }

    .nav-left a, .nav-right a {
      font-size: 16px;
      font-weight: 500;
      color: var(--text-gray);
      transition: color var(--transition);
      position: relative;
      padding: 4px 0;
    }

    .nav-left a:hover, .nav-right a:hover {
      color: var(--primary);
    }

    .nav-left a.active, .nav-right a.active {
      color: var(--primary);
      border-bottom: 2px solid var(--primary);
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 6px;
      cursor: pointer;
      z-index: 20;
      background: transparent;
      border: none;
      padding: 8px;
    }

    .hamburger span {
      display: block;
      width: 26px;
      height: 2px;
      background: white;
      transition: var(--transition);
      border-radius: 2px;
    }

    .mobile-menu {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      background: rgba(11, 11, 15, 0.98);
      backdrop-filter: blur(20px);
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 36px;
      z-index: 15;
    }

    .mobile-menu a {
      font-size: 22px;
      font-weight: 600;
      color: var(--text-white);
      letter-spacing: 1px;
    }

    .mobile-menu a:hover {
      color: var(--primary);
    }

    /* 区块通用 */
    section {
      padding: 100px 0;
    }

    @media (max-width: 768px) {
      section {
        padding: 60px 0;
      }
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      background: radial-gradient(circle at 30% 40%, rgba(168,85,247,0.18) 0%, #0B0B0F 70%);
      position: relative;
      overflow: hidden;
    }

    .hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.25;
      z-index: 0;
    }

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

    .hero h1 {
      font-size: 48px;
      font-weight: 900;
      color: white;
      line-height: 1.2;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero .subtitle {
      font-size: 18px;
      color: var(--text-gray);
      margin-bottom: 40px;
    }

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

    .btn-primary {
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: white;
      font-weight: 600;
      font-size: 18px;
      padding: 16px 36px;
      border-radius: var(--radius-btn);
      border: none;
      cursor: pointer;
      transition: var(--transition);
      box-shadow: 0 4px 14px rgba(168,85,247,0.4);
    }

    .btn-primary:hover {
      transform: scale(1.03);
      box-shadow: 0 0 28px var(--primary-glow);
    }

    .btn-outline {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.5);
      color: white;
      font-weight: 600;
      font-size: 18px;
      padding: 16px 36px;
      border-radius: var(--radius-btn);
      cursor: pointer;
      transition: var(--transition);
    }

    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      box-shadow: 0 0 16px rgba(168,85,247,0.3);
    }

    .data-badge-float {
      display: flex;
      gap: 24px;
      justify-content: center;
      margin-top: 48px;
    }

    .badge-item {
      background: rgba(30,30,40,0.7);
      backdrop-filter: blur(8px);
      padding: 12px 24px;
      border-radius: 40px;
      color: white;
      font-weight: 600;
      border: 1px solid var(--border-dim);
    }

    /* 数据看板 */
    .dashboard-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .stat-card {
      background: var(--bg-card);
      border-radius: var(--radius-card);
      padding: 28px 24px;
      border: 1px solid var(--border-dim);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .stat-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-glow);
      transform: translateY(-2px);
    }

    .stat-number {
      font-size: 44px;
      font-weight: 800;
      color: white;
      font-feature-settings: "tnum";
      letter-spacing: -0.5px;
    }

    .stat-label {
      color: var(--text-gray);
      font-size: 16px;
    }

    .orange-badge {
      background: var(--secondary);
      color: white;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      display: inline-block;
      width: fit-content;
      box-shadow: 0 0 12px var(--secondary-glow);
    }

    /* 服务卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
      margin-top: 40px;
    }

    .service-card {
      background: var(--bg-card);
      border-radius: var(--radius-card);
      padding: 40px 28px;
      border: 1px solid var(--border-dim);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .service-card:hover {
      transform: translateY(-6px);
      border-color: var(--primary);
      box-shadow: var(--shadow-glow);
    }

    .service-icon {
      font-size: 36px;
    }

    .service-card h3 {
      font-size: 24px;
      font-weight: 700;
      color: white;
    }

    .tag-list {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 8px;
    }

    .tag {
      background: rgba(168,85,247,0.15);
      color: var(--primary);
      padding: 4px 14px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 500;
    }

    /* 对比模块 */
    .comparison-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }

    .pain-list {
      list-style: none;
    }

    .pain-list li {
      color: #6B7280;
      font-size: 18px;
      margin-bottom: 20px;
      text-decoration: line-through;
    }

    .gain-list {
      list-style: none;
    }

    .gain-list li {
      color: white;
      font-size: 18px;
      margin-bottom: 20px;
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .check-icon {
      color: var(--secondary);
      font-weight: bold;
      font-size: 20px;
    }

    .progress-bar {
      background: rgba(255,255,255,0.1);
      height: 10px;
      border-radius: 10px;
      margin-top: 30px;
      width: 100%;
    }

    .progress-fill {
      width: 88%;
      height: 100%;
      background: linear-gradient(90deg, var(--primary), var(--secondary));
      border-radius: 10px;
      box-shadow: 0 0 16px var(--primary-glow);
    }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid var(--border-dim);
      padding: 20px 0;
    }

    .faq-question {
      font-size: 20px;
      font-weight: 700;
      color: white;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      color: var(--text-light);
      padding-left: 32px;
    }

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

    /* CTA 表单 */
    .cta-block {
      background: #0B0B0F;
      background-image: radial-gradient(circle at 20% 30%, rgba(168,85,247,0.12), transparent);
    }

    .form-card {
      background: var(--bg-card);
      border-radius: var(--radius-card);
      padding: 48px;
      max-width: 600px;
      margin: 0 auto;
      border: 1px solid var(--border-dim);
    }

    .input-field {
      width: 100%;
      background: #2A2A35;
      border: 1px solid var(--border-dim);
      border-radius: var(--radius-sm);
      padding: 16px;
      color: white;
      margin-bottom: 20px;
      transition: var(--transition);
    }

    .input-field:focus {
      outline: none;
      border-color: var(--secondary);
      box-shadow: 0 0 0 3px rgba(249,115,22,0.3);
    }

    .btn-submit {
      width: 100%;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      border: none;
      padding: 18px;
      font-weight: 700;
      font-size: 18px;
      color: white;
      border-radius: var(--radius-btn);
      cursor: pointer;
      transition: var(--transition);
    }

    .btn-submit:hover {
      box-shadow: 0 0 30px var(--primary-glow);
      transform: scale(1.02);
    }

    /* 页脚 */
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }

    .footer-logo {
      font-size: 22px;
      font-weight: 800;
      color: white;
    }

    @media (max-width: 1024px) {
      .dashboard-grid { grid-template-columns: repeat(2, 1fr); }
      .services-grid { grid-template-columns: 1fr; }
    }

    @media (max-width: 768px) {
      .nav-left, .nav-right { display: none; }
      .hamburger { display: flex; }
      .logo { position: static; transform: none; margin: 0 auto; }
      .nav-container { justify-content: space-between; }
      .comparison-wrapper { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      h1 { font-size: 36px !important; }
      .stat-number { font-size: 36px; }
    }