/* roulang page: index */
:root {
      --primary-deep: #0A0E27;
      --accent-cyan: #00F0FF;
      --accent-magenta: #FF3CAC;
      --bg-light: #F4F6FC;
      --white: #FFFFFF;
      --text-body: #4A4A6A;
      --text-dark: #1A1A2E;
      --border-light: rgba(0,0,0,0.06);
      --shadow-card: 0 12px 28px rgba(10,14,39,0.06);
      --shadow-hover: 0 20px 40px rgba(0,240,255,0.12);
      --radius-card: 20px;
      --radius-btn: 30px;
      --radius-input: 12px;
      --transition: all 0.25s ease;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: -apple-system, 'PingFang SC', 'Microsoft YaHei', 'Inter', sans-serif;
      background-color: var(--white);
      color: var(--text-body);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    /* 导航 */
    .header {
      position: sticky;
      top: 0;
      z-index: 40;
      background: var(--white);
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
      border-bottom: 1px solid var(--border-light);
      height: 72px;
      display: flex;
      align-items: center;
    }
    .nav-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }
    .logo {
      font-size: 22px;
      font-weight: 700;
      background: linear-gradient(135deg, #0A0E27 0%, #00F0FF 80%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .logo i {
      background: none;
      -webkit-text-fill-color: var(--accent-cyan);
      font-size: 26px;
    }
    .nav-links {
      display: flex;
      gap: 28px;
      align-items: center;
    }
    .nav-links a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-body);
      position: relative;
      padding: 4px 0;
      transition: var(--transition);
    }
    .nav-links a:hover {
      color: var(--accent-cyan);
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent-cyan);
      transition: width 0.25s ease;
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .search-box {
      display: flex;
      align-items: center;
      background: #F0F2F8;
      border-radius: 30px;
      padding: 6px 16px;
      margin-right: 12px;
    }
    .search-box input {
      border: none;
      background: transparent;
      outline: none;
      font-size: 14px;
      width: 130px;
    }
    .search-box i {
      color: var(--text-body);
      font-size: 14px;
    }
    .btn-capsule {
      background: var(--accent-cyan);
      color: #0A0E27;
      font-weight: 600;
      padding: 10px 24px;
      border-radius: 30px;
      font-size: 14px;
      border: none;
      cursor: pointer;
      transition: var(--transition);
      display: inline-block;
      text-align: center;
      white-space: nowrap;
    }
    .btn-capsule:hover {
      background: linear-gradient(90deg, #FF3CAC, #00F0FF);
      color: white;
      box-shadow: 0 8px 18px rgba(255,60,172,0.3);
    }
    .hamburger {
      display: none;
      font-size: 24px;
      cursor: pointer;
      color: var(--text-dark);
    }
    .mobile-menu {
      display: none;
    }
    /* Hero */
    .hero {
      background: linear-gradient(135deg, #0A0E27 0%, #1A1F4B 50%, #0A0E27 100%);
      padding: 70px 0;
      position: relative;
      overflow: hidden;
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 40px;
    }
    .hero-left {
      flex: 1.2;
      color: white;
    }
    .hero-left h1 {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.2;
      background: linear-gradient(to right, #fff, #00F0FF);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 20px;
    }
    .hero-sub {
      font-size: 18px;
      color: rgba(255,255,255,0.8);
      margin-bottom: 32px;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 28px;
    }
    .btn-ghost {
      border: 1px solid white;
      color: white;
      background: transparent;
      padding: 10px 24px;
      border-radius: 30px;
      font-weight: 600;
      transition: var(--transition);
    }
    .btn-ghost:hover {
      background: rgba(255,255,255,0.15);
    }
    .badge-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .badge {
      background: rgba(255,255,255,0.15);
      backdrop-filter: blur(10px);
      padding: 8px 18px;
      border-radius: 30px;
      color: white;
      font-size: 13px;
      font-weight: 600;
    }
    .badge span {
      color: var(--accent-cyan);
      font-weight: 700;
      margin-right: 4px;
    }
    .hero-right {
      flex: 0.9;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: 28px;
      min-height: 320px;
      position: relative;
      box-shadow: 0 20px 40px rgba(0,240,255,0.2);
    }
    .hero-right::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(10,14,39,0.5), rgba(0,240,255,0.15));
      border-radius: 28px;
    }
    /* 通用区块 */
    .section {
      padding: 80px 0;
    }
    .section-title {
      font-size: 36px;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 16px;
    }
    .section-sub {
      color: var(--text-body);
      margin-bottom: 48px;
    }
    .bg-light {
      background: #F4F6FC;
    }
    /* 核心优势 */
    .highlights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .highlight-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 40px 24px;
      text-align: center;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }
    .highlight-card:hover {
      transform: translateY(-8px);
      box-shadow: 0 24px 42px rgba(0,240,255,0.18);
    }
    .highlight-icon {
      font-size: 44px;
      color: var(--accent-cyan);
      margin-bottom: 20px;
    }
    .highlight-card h3 {
      font-size: 22px;
      font-weight: 600;
      margin-bottom: 12px;
    }
    .data-badge {
      background: #F0F9FF;
      color: var(--accent-cyan);
      font-weight: 700;
      padding: 6px 16px;
      border-radius: 30px;
      display: inline-block;
      margin-top: 16px;
    }
    /* 服务卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .service-card {
      background: #F4F6FC;
      border-radius: var(--radius-card);
      padding: 24px;
      display: flex;
      gap: 20px;
      transition: var(--transition);
    }
    .service-card:hover {
      background: white;
      box-shadow: var(--shadow-hover);
      border-right: 4px solid var(--accent-cyan);
    }
    .service-img {
      width: 80px;
      height: 80px;
      border-radius: 16px;
      object-fit: cover;
      background: #ddd;
    }
    .tag {
      background: var(--accent-magenta);
      color: white;
      font-size: 12px;
      padding: 2px 12px;
      border-radius: 20px;
      display: inline-block;
      margin-top: 8px;
    }
    /* 流程 */
    .process-steps {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      position: relative;
      margin-top: 50px;
    }
    .step {
      text-align: center;
      flex: 1;
      position: relative;
    }
    .step-num {
      width: 48px;
      height: 48px;
      background: var(--accent-cyan);
      color: #0A0E27;
      font-weight: 700;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
    }
    .step h4 {
      font-weight: 700;
    }
    /* 案例 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }
    .case-card {
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }
    .case-card:hover {
      transform: translateY(-6px);
    }
    .case-cover {
      height: 200px;
      background-size: cover;
      background-position: center;
    }
    .case-info {
      padding: 20px;
    }
    /* FAQ */
    .faq-layout {
      display: flex;
      gap: 40px;
    }
    .faq-filter {
      flex: 0 0 180px;
    }
    .faq-filter button {
      display: block;
      background: none;
      border: none;
      padding: 10px 0;
      font-weight: 500;
      color: var(--text-body);
      cursor: pointer;
      text-align: left;
      width: 100%;
    }
    .faq-filter button.active {
      color: var(--accent-cyan);
      border-bottom: 2px solid var(--accent-cyan);
    }
    .accordion-item {
      border-bottom: 1px solid #eee;
      padding: 16px 0;
    }
    .accordion-title {
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
    }
    /* 对比 */
    .compare-table {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }
    .compare-col {
      padding: 32px;
      border-radius: 24px;
    }
    .old-col {
      background: #f0f0f5;
      color: #666;
    }
    .new-col {
      background: white;
      border: 2px solid var(--accent-cyan);
    }
    /* CTA */
    .cta-section {
      background: linear-gradient(90deg, #FF3CAC, #00F0FF);
      padding: 80px 0;
      text-align: center;
      color: white;
    }
    .cta-form {
      display: flex;
      gap: 16px;
      justify-content: center;
      flex-wrap: wrap;
    }
    .cta-form input {
      padding: 14px 20px;
      border-radius: 30px;
      border: none;
      min-width: 200px;
    }
    /* Footer */
    .footer {
      background: #0A0E27;
      color: #ccc;
      padding: 60px 0 20px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
    }
    @media (max-width: 1024px) {
      .highlights-grid, .services-grid { grid-template-columns: repeat(2,1fr); }
      .nav-links { display: none; }
      .hamburger { display: block; }
    }
    @media (max-width: 768px) {
      .hero-grid { flex-direction: column; }
      .hero-left h1 { font-size: 36px; }
      .highlights-grid, .services-grid, .cases-grid { grid-template-columns: 1fr; }
      .process-steps { flex-direction: column; gap: 28px; }
      .faq-layout { flex-direction: column; }
      .compare-table { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 520px) {
      .footer-grid { grid-template-columns: 1fr; }
    }