/* roulang page: index */
:root {
      --primary: #E85D04;
      --primary-dark: #c94d02;
      --secondary: #2B2D42;
      --accent: #FAA307;
      --accent-hover: #e89506;
      --bg-warm: #FDF0E3;
      --card-bg: #FFFFFF;
      --success: #06D6A0;
      --danger: #EF476F;
      --text-main: #2B2D42;
      --text-muted: #6c6e7e;
      --border-light: #e9e3db;
      --radius-card: 12px;
      --radius-btn: 8px;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.06);
      --shadow-hover: 0 12px 28px rgba(0,0,0,0.12);
      --font-sans: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Inter", sans-serif;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: #fff;
      color: var(--text-main);
      line-height: 1.7;
      margin: 0;
      padding: 0;
    }
    h1, h2, h3, h4 {
      font-weight: 700;
      color: var(--secondary);
    }
    a {
      color: var(--primary);
      text-decoration: none;
    }
    a:hover {
      color: var(--primary-dark);
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1.5rem;
    }
    /* 顶部信息条 */
    .top-bar-strip {
      background: var(--secondary);
      color: #FDF0E3;
      font-size: 0.8rem;
      height: 36px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 1.5rem;
    }
    .top-bar-strip a {
      color: #FDF0E3;
      font-weight: 500;
    }
    /* 主导航 */
    .main-nav {
      background: #fff;
      height: 68px;
      box-shadow: 0 1px 8px rgba(0,0,0,0.04);
      display: flex;
      align-items: center;
      position: sticky;
      top: 0;
      z-index: 40;
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .logo-text {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 1.8rem;
    }
    .nav-links a {
      color: var(--secondary);
      font-weight: 500;
      position: relative;
    }
    .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 {
      width: 100%;
    }
    .btn-cta-nav {
      background: var(--accent);
      color: #fff !important;
      padding: 0.6rem 1.5rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
      margin-left: 0.8rem;
      white-space: nowrap;
      transition: 0.2s;
    }
    .btn-cta-nav:hover {
      background: var(--primary);
      color: #fff;
      transform: scale(1.02);
    }
    /* 汉堡菜单隐藏默认 */
    .mobile-menu-icon {
      display: none;
      font-size: 1.8rem;
      color: var(--secondary);
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 68px;
        left: 0;
        width: 100%;
        background: white;
        padding: 1.5rem;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-menu-icon {
        display: block;
        cursor: pointer;
      }
    }
    /* 区块间距 */
    section {
      padding: 80px 0;
    }
    @media (max-width: 640px) {
      section {
        padding: 50px 0;
      }
      h1 {
        font-size: 2.2rem !important;
      }
      h2 {
        font-size: 1.8rem !important;
      }
    }
    /* Hero */
    .hero {
      background: linear-gradient(135deg, #FDF0E3 0%, #fff5ec 100%);
      position: relative;
    }
    .hero-content {
      display: flex;
      align-items: center;
      gap: 2rem;
    }
    .hero-left {
      flex: 1;
    }
    .hero-right {
      flex: 1;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      border-radius: 24px;
      min-height: 340px;
    }
    .metric-cards {
      display: flex;
      gap: 1rem;
      margin: 2rem 0;
    }
    .metric-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 1.2rem;
      box-shadow: var(--shadow-sm);
      text-align: center;
      flex: 1;
    }
    .metric-number {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary);
      font-family: 'Inter', sans-serif;
    }
    .btn-primary {
      background: var(--accent);
      color: #fff;
      padding: 0.9rem 2rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
      display: inline-block;
      border: none;
      transition: 0.2s;
    }
    .btn-primary:hover {
      background: var(--primary);
      color: white;
    }
    .btn-outline {
      border: 1.5px solid var(--primary);
      color: var(--primary);
      background: transparent;
      padding: 0.8rem 1.8rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
    }
    /* 卡片通用 */
    .card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      padding: 2rem 1.5rem;
      transition: all 0.25s;
    }
    .card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .icon-circle {
      width: 64px;
      height: 64px;
      background: #FDF0E3;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 1.2rem;
      color: var(--primary);
      font-size: 1.8rem;
    }
    .service-card:hover .icon-circle {
      background: var(--primary);
      color: white;
    }
    /* 对比表 */
    .compare-grid {
      display: flex;
      gap: 2rem;
    }
    .compare-col {
      flex:1;
      background: white;
      border-radius: 16px;
      padding: 2rem;
    }
    .badge-red {
      color: var(--danger);
      font-weight: 600;
    }
    .badge-green {
      color: var(--success);
      font-weight: 600;
    }
    /* FAQ */
    .accordion-title {
      font-weight: 600;
      background: white;
      border-radius: 8px;
    }
    .accordion-title:hover {
      background: #fdf0e3;
    }
    .accordion-item.is-active .accordion-title {
      color: var(--primary);
      background: #fff7ef;
    }
    /* 表单深色区 */
    .form-section {
      background: var(--secondary);
      color: white;
      padding: 70px 0;
    }
    .form-section input, .form-section textarea {
      border-radius: 6px;
      border: 1px solid #ddd;
      padding: 0.85rem;
    }
    .form-section input:focus {
      border-color: var(--accent);
      box-shadow: 0 0 0 2px rgba(250,163,7,0.3);
    }
    .btn-submit {
      background: var(--accent);
      color: white;
      font-weight: 700;
      width: 100%;
      padding: 0.9rem;
    }
    .btn-submit:hover {
      background: var(--primary);
    }
    footer {
      background: var(--secondary);
      color: #ccc;
      padding: 3rem 0 1rem;
    }
    .footer-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 2rem;
    }
    .copyright-bar {
      background: #1a1b2e;
      text-align: center;
      padding: 1rem;
      color: #888;
    }
    @media (max-width: 768px) {
      .hero-content, .compare-grid {
        flex-direction: column;
      }
      .metric-cards {
        flex-wrap: wrap;
      }
    }