/* roulang page: index */
/* 设计变量与全局重置 */
    :root {
      --primary-deep: #0A0E27;
      --accent-cyan: #00F0FF;
      --cta-pink: #FF3CAC;
      --bg-light: #F5F7FA;
      --text-dark: #1A1A2E;
      --text-white: #FFFFFF;
      --card-bg: #FFFFFF;
      --border-light: #E8ECF1;
      --shadow-card: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-hover: 0 12px 32px rgba(0,0,0,0.08);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-input: 6px;
      --font-body: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --font-number: "Inter", "Roboto", sans-serif;
      --transition-smooth: 0.25s ease;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-body);
      color: var(--text-dark);
      background-color: var(--bg-light);
      margin: 0;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    /* 自定义导航栏 SaaS 风格 */
    .navbar-custom {
      background: rgba(255,255,255,0.98);
      backdrop-filter: blur(10px);
      padding: 12px 0;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 100;
      box-shadow: 0 2px 12px rgba(0,0,0,0.02);
      transition: var(--transition-smooth);
    }
    .navbar-custom.scrolled {
      box-shadow: 0 6px 20px rgba(0,0,0,0.06);
    }
    .nav-logo {
      font-size: 1.6rem;
      font-weight: 700;
      color: var(--primary-deep);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .nav-logo i {
      color: var(--accent-cyan);
      font-size: 1.8rem;
    }
    .nav-logo span {
      background: linear-gradient(135deg, #0A0E27 0%, #1A1A2E 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .nav-menu a {
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--text-dark);
      margin: 0 12px;
      padding: 6px 4px;
      border-bottom: 2px solid transparent;
      transition: var(--transition-smooth);
    }
    .nav-menu a:hover {
      color: var(--accent-cyan);
      border-bottom-color: var(--accent-cyan);
    }
    .search-decor {
      background: #F0F2F5;
      border-radius: 20px;
      padding: 8px 18px;
      display: flex;
      align-items: center;
      gap: 8px;
      color: #8A8FA0;
      font-size: 0.9rem;
      margin-right: 12px;
    }
    .search-decor input {
      border: none;
      background: transparent;
      outline: none;
      width: 140px;
      font-size: 0.85rem;
    }
    .btn-cta {
      background: var(--cta-pink);
      color: white;
      font-weight: 600;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-size: 0.9rem;
      letter-spacing: 0.5px;
      transition: var(--transition-smooth);
      box-shadow: 0 4px 12px rgba(255,60,172,0.25);
      white-space: nowrap;
    }
    .btn-cta:hover {
      background: #e6339a;
      transform: scale(1.03);
      box-shadow: 0 8px 18px rgba(255,60,172,0.35);
      color: white;
    }
    .btn-outline-light {
      border: 1.5px solid white;
      color: white;
      font-weight: 600;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      background: transparent;
      transition: var(--transition-smooth);
    }
    .btn-outline-light:hover {
      background: rgba(255,255,255,0.15);
      color: white;
    }
    /* 汉堡菜单样式 */
    .hamburger {
      display: none;
      font-size: 1.8rem;
      color: var(--text-dark);
    }
    @media (max-width: 840px) {
      .nav-menu, .search-decor, .desktop-cta {
        display: none !important;
      }
      .hamburger {
        display: block;
      }
      .mobile-menu {
        display: none;
        flex-direction: column;
        background: white;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
      }
      .mobile-menu.active {
        display: flex;
      }
      .mobile-menu a {
        padding: 12px 0;
        border-bottom: 1px solid #eee;
        font-weight: 500;
      }
    }
    /* Hero区域 */
    .hero-section {
      background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
      min-height: 80vh;
      position: relative;
      display: flex;
      align-items: center;
      margin-top: 70px;
    }
    .hero-overlay {
      background: linear-gradient(135deg, rgba(10,14,39,0.85) 0%, rgba(0,240,255,0.15) 100%);
      position: absolute;
      top: 0; left: 0; width: 100%; height: 100%;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      color: white;
      max-width: 800px;
      margin: 0 auto;
      text-align: center;
      padding: 20px;
    }
    .hero-content h1 {
      font-size: 3rem;
      font-weight: 700;
      line-height: 1.2;
      letter-spacing: -0.5px;
      margin-bottom: 24px;
    }
    .hero-content p {
      font-size: 1.2rem;
      opacity: 0.9;
      margin-bottom: 36px;
      max-width: 600px;
      margin-left: auto;
      margin-right: auto;
    }
    .btn-hero-primary {
      background: white;
      color: var(--cta-pink);
      font-weight: 700;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      margin: 0 8px;
      display: inline-block;
      transition: var(--transition-smooth);
    }
    .btn-hero-primary:hover {
      background: #f0f0f0;
      transform: translateY(-2px);
    }
    @media (max-width: 640px) {
      .hero-content h1 { font-size: 2rem; }
      .hero-content p { font-size: 1rem; }
      .hero-section { min-height: 70vh; }
    }
    /* 通用板块标题 */
    .section-title {
      font-size: 2.2rem;
      font-weight: 600;
      margin-bottom: 16px;
      text-align: center;
      color: var(--primary-deep);
    }
    .section-subtitle {
      color: #5A6070;
      text-align: center;
      max-width: 680px;
      margin: 0 auto 50px;
      font-size: 1.1rem;
    }
    /* 指标卡片 */
    .metric-card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 28px 20px;
      box-shadow: var(--shadow-card);
      border-top: 3px solid var(--accent-cyan);
      text-align: center;
    }
    .metric-number {
      font-family: var(--font-number);
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--cta-pink);
    }
    .metric-label {
      color: #666;
      font-size: 0.9rem;
      margin-top: 8px;
    }
    /* 服务卡片 */
    .service-card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      box-shadow: var(--shadow-card);
      transition: all 0.25s ease;
      height: 100%;
      border: 1px solid var(--border-light);
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-color: var(--accent-cyan);
    }
    .service-icon {
      width: 64px;
      height: 64px;
      background: #f0f9ff;
      border-radius: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--accent-cyan);
      font-size: 2rem;
    }
    /* 对比区域 */
    .compare-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 30px;
      box-shadow: var(--shadow-card);
    }
    .compare-highlight {
      border: 2px solid var(--accent-cyan);
      background: linear-gradient(white, #fafdff);
    }
    .vs-badge {
      background: var(--cta-pink);
      color: white;
      border-radius: 50%;
      width: 48px;
      height: 48px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      margin: 20px auto;
    }
    /* FAQ手风琴 */
    .accordion-faq .card {
      border: none;
      margin-bottom: 12px;
      border-radius: 8px;
      overflow: hidden;
    }
    .accordion-faq .card-header {
      background: #F5F7FA;
      padding: 16px 24px;
      font-weight: 600;
      font-size: 1.1rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid #eee;
    }
    .accordion-faq .card-body {
      padding: 20px 24px;
      background: white;
      line-height: 1.8;
    }
    /* 表单区块 */
    .contact-section {
      background: var(--primary-deep);
      padding: 80px 0;
      color: white;
    }
    .form-input {
      background: white;
      border-radius: var(--radius-input);
      border: 1px solid #ddd;
      padding: 12px 16px;
      width: 100%;
      margin-bottom: 16px;
    }
    .form-input:focus {
      border-color: var(--accent-cyan);
      outline: none;
    }
    .footer-custom {
      background: #0A0E27;
      color: #B0B8C8;
      padding: 50px 0 30px;
    }
    .footer-links a {
      color: #B0B8C8;
      display: block;
      margin-bottom: 10px;
      font-size: 0.95rem;
    }
    .footer-links a:hover {
      color: var(--accent-cyan);
    }