/* roulang page: index */
:root {
      --primary: #7B4B7A;
      --primary-deep: #5E3B5D;
      --accent: #4A6B4A;
      --bg-warm: #FDFBF7;
      --text-dark: #2C2C2C;
      --text-muted: #5A5A5A;
      --text-light: #8A8A8A;
      --border-light: rgba(0,0,0,0.06);
      --card-shadow: 0 4px 12px rgba(0,0,0,0.03);
      --card-hover-shadow: 0 8px 24px rgba(0,0,0,0.08);
      --radius-card: 16px;
      --radius-btn: 10px;
      --transition: all 0.25s ease;
      --font-stack: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --max-width: 1200px;
      --space-section: 80px;
    }

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

    body {
      font-family: var(--font-stack);
      background-color: #FFFFFF;
      color: var(--text-dark);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
    }

    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }

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

    a {
      text-decoration: none;
      color: inherit;
    }

    button, input {
      font-family: inherit;
    }

    /* 导航栏 - 桌面 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(255,255,255,0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      z-index: 100;
      border-bottom: 1px solid rgba(0,0,0,0.04);
      transition: var(--transition);
    }
    .nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--primary);
      letter-spacing: 1px;
    }
    .logo svg {
      width: 28px;
      height: 28px;
      fill: none;
      stroke: var(--primary);
      stroke-width: 2;
    }
    .nav-links {
      display: flex;
      gap: 36px;
      align-items: center;
    }
    .nav-links a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      transition: color 0.2s;
      position: relative;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: width 0.2s;
    }
    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }

    /* 移动端底部Tab导航 */
    .mobile-tab {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: #FFFFFF;
      border-top: 1px solid #EAEAEA;
      z-index: 110;
      justify-content: space-around;
      padding: 8px 0 12px;
      box-shadow: 0 -2px 10px rgba(0,0,0,0.02);
    }
    .tab-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 4px;
      color: var(--text-muted);
      font-size: 0.7rem;
      transition: color 0.2s;
      background: none;
      border: none;
      cursor: pointer;
    }
    .tab-item svg {
      width: 24px;
      height: 24px;
      stroke: currentColor;
      fill: none;
      stroke-width: 2;
    }
    .tab-item.active {
      color: var(--primary);
    }
    .tab-item.active svg {
      fill: var(--primary);
      stroke: var(--primary);
    }

    /* Hero区块 */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: linear-gradient(180deg, rgba(123,75,122,0.08) 0%, rgba(253,251,247,0.95) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      padding: 100px 0 60px;
      position: relative;
      overflow: hidden;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: 3.2rem;
      font-weight: 700;
      line-height: 1.2;
      color: var(--text-dark);
      margin-bottom: 20px;
    }
    .hero-content h1 span {
      color: var(--primary);
    }
    .hero-sub {
      font-size: 1.15rem;
      color: var(--text-muted);
      margin-bottom: 32px;
      max-width: 500px;
    }
    .hero-stats {
      display: flex;
      gap: 40px;
      margin-bottom: 36px;
    }
    .stat-item {
      display: flex;
      flex-direction: column;
    }
    .stat-number {
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--accent);
      line-height: 1.1;
    }
    .stat-label {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-top: 4px;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--primary);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 1rem;
      border: none;
      cursor: pointer;
      transition: var(--transition);
      box-shadow: 0 4px 12px rgba(123,75,122,0.25);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-primary:hover {
      background: var(--primary-deep);
      box-shadow: 0 8px 20px rgba(123,75,122,0.35);
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--primary);
      color: var(--primary);
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 1rem;
      cursor: pointer;
      transition: var(--transition);
    }
    .btn-outline:hover {
      background: rgba(123,75,122,0.08);
      transform: translateY(-2px);
    }
    .hero-image {
      position: relative;
      display: flex;
      justify-content: center;
      align-items: center;
    }
    .hero-image img {
      max-height: 500px;
      object-fit: contain;
      filter: drop-shadow(0 20px 30px rgba(0,0,0,0.1));
      animation: float 5s ease-in-out infinite;
    }
    @keyframes float {
      0% { transform: translateY(0px); }
      50% { transform: translateY(-12px); }
      100% { transform: translateY(0px); }
    }

    /* 通用区块标题 */
    .section {
      padding: var(--space-section) 0;
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 12px;
      text-align: center;
    }
    .section-sub {
      font-size: 1.1rem;
      color: var(--text-muted);
      text-align: center;
      max-width: 680px;
      margin: 0 auto 48px;
    }

    /* 数据看板 */
    .dashboard-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .stat-card {
      background: #FDF9F5;
      border: 1px solid rgba(0,0,0,0.04);
      border-radius: var(--radius-card);
      padding: 28px 24px;
      transition: var(--transition);
      box-shadow: var(--card-shadow);
    }
    .stat-card:hover {
      box-shadow: var(--card-hover-shadow);
      transform: translateY(-3px);
      border-color: rgba(123,75,122,0.15);
    }
    .stat-card .number {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--accent);
      margin-bottom: 8px;
    }
    .stat-card .label {
      font-weight: 600;
      color: var(--text-dark);
      margin-bottom: 12px;
    }
    .trend {
      font-size: 0.9rem;
      display: flex;
      align-items: center;
      gap: 4px;
    }
    .trend.up { color: #2E7D32; }
    .trend.down { color: #B84C4C; }

    /* 服务矩阵 */
    .service-bg {
      background-color: rgba(123,75,122,0.03);
      border-radius: 40px 40px 0 0;
    }
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .service-item {
      background: white;
      padding: 32px 24px;
      border-radius: var(--radius-card);
      text-align: center;
      box-shadow: var(--card-shadow);
      border: 1px solid var(--border-light);
      transition: var(--transition);
    }
    .service-item:hover {
      box-shadow: var(--card-hover-shadow);
      transform: translateY(-4px);
    }
    .service-icon {
      font-size: 2.5rem;
      margin-bottom: 16px;
      color: var(--primary);
    }
    .service-name {
      font-weight: 700;
      font-size: 1.2rem;
      margin-bottom: 8px;
    }
    .service-desc {
      color: var(--text-muted);
      font-size: 0.95rem;
    }

    /* 对比卡片 */
    .comparison-grid {
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      align-items: center;
      gap: 20px;
    }
    .card-compare {
      background: #F5F5F5;
      border-radius: 20px;
      padding: 32px;
      color: #999;
    }
    .card-compare.highlight {
      background: linear-gradient(135deg, #F7EDF7 0%, #FFFFFF 100%);
      border: 2px solid var(--primary);
      border-left: 6px solid var(--primary);
      color: var(--text-dark);
    }
    .compare-title {
      font-weight: 700;
      font-size: 1.3rem;
      margin-bottom: 16px;
    }
    .compare-data {
      font-size: 2rem;
      font-weight: 800;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .vs-badge {
      background: white;
      border-radius: 50%;
      width: 56px;
      height: 56px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: var(--primary);
      box-shadow: 0 6px 18px rgba(0,0,0,0.08);
      font-size: 1.2rem;
    }

    /* FAQ */
    .faq-list {
      max-width: 720px;
      margin: 0 auto;
    }
    .faq-item {
      border-bottom: 1px solid #ECECEC;
    }
    .faq-question {
      width: 100%;
      background: none;
      border: none;
      padding: 20px 0;
      font-weight: 600;
      font-size: 1.1rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      color: var(--text-dark);
      transition: background 0.2s;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s;
      color: var(--text-muted);
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-bottom: 20px;
    }
    .faq-icon {
      transition: transform 0.3s;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    /* CTA表单 */
    .cta-section {
      background: #3E2E3D;
      color: white;
      padding: 70px 0;
      border-radius: 30px 30px 0 0;
    }
    .cta-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .cta-title {
      font-size: 2rem;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .input-group {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .input-field {
      background: transparent;
      border: none;
      border-bottom: 2px solid rgba(255,255,255,0.4);
      padding: 14px 8px;
      color: white;
      font-size: 1rem;
      outline: none;
      transition: border 0.2s;
    }
    .input-field:focus {
      border-bottom-color: #D4A0D0;
    }
    .btn-submit {
      background: var(--primary);
      border: none;
      color: white;
      padding: 16px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      cursor: pointer;
      transition: 0.2s;
      margin-top: 8px;
    }
    .btn-submit:hover {
      background: #8B5C8A;
    }

    /* 页脚 */
    .footer {
      background: #1E1E1E;
      color: #B0B0B0;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 30px;
    }
    .footer-col h4 {
      color: white;
      margin-bottom: 16px;
    }
    .footer-col a {
      display: block;
      color: #B0B0B0;
      margin-bottom: 10px;
      font-size: 0.9rem;
    }
    .copyright {
      margin-top: 40px;
      text-align: center;
      color: #6A6A6A;
    }

    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; text-align: center; }
      .hero-stats { justify-content: center; }
      .hero-actions { justify-content: center; }
      .hero-image { order: -1; }
      .dashboard-grid { grid-template-columns: repeat(2,1fr); }
      .service-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 768px) {
      .header { display: none; }
      .mobile-tab { display: flex; }
      .hero { padding: 60px 0 80px; }
      .hero-content h1 { font-size: 2.2rem; }
      .dashboard-grid, .service-grid { grid-template-columns: 1fr; }
      .comparison-grid { grid-template-columns: 1fr; }
      .vs-badge { margin: 12px auto; }
      .cta-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: repeat(2,1fr); }
      .section-title { font-size: 1.8rem; }
    }