/* roulang page: index */
:root {
      --primary-deep: #1E2F2A;
      --accent-cyan: #00C2BA;
      --accent-cyan-hover: #009E98;
      --accent-light-bg: #E0FAF8;
      --bg-page: #F5F7F6;
      --card-bg: #FFFFFF;
      --text-main: #3A3D3C;
      --text-light: #6F7372;
      --text-white: #FFFFFF;
      --border-light: #D1D5D4;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-hover: 0 8px 30px rgba(0,0,0,0.08);
      --radius-card: 16px;
      --radius-tag: 12px;
      --radius-btn: 50px;
      --radius-input: 8px;
      --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --font-body: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      --transition-base: all 0.25s ease;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-body);
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.7;
      font-size: 16px;
      margin: 0;
      padding-top: 90px; /* 为浮动导航留出空间 */
    }
    h1, h2, h3, h4 {
      font-family: var(--font-heading);
      font-weight: 600;
      color: var(--primary-deep);
    }
    h1 {
      font-size: 42px;
      line-height: 1.2;
      font-weight: 700;
      color: var(--text-white);
    }
    h2 {
      font-size: 32px;
      line-height: 1.3;
      margin-bottom: 1rem;
    }
    h3 {
      font-size: 20px;
      line-height: 1.4;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition-base);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    /* 浮动 Dock 导航 */
    .floating-nav {
      position: fixed;
      top: 20px;
      left: 50%;
      transform: translateX(-50%);
      width: calc(100% - 40px);
      max-width: 1100px;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-radius: 60px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.05);
      border: 1px solid rgba(0,0,0,0.04);
      padding: 8px 24px;
      z-index: 999;
      display: flex;
      align-items: center;
      justify-content: space-between;
      transition: var(--transition-base);
    }
    .nav-logo {
      font-family: var(--font-heading);
      font-weight: 700;
      font-size: 1.6rem;
      color: var(--primary-deep);
      letter-spacing: -0.5px;
    }
    .nav-logo span {
      color: var(--accent-cyan);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 2rem;
    }
    .nav-links a {
      font-weight: 500;
      color: var(--text-main);
      padding: 0.25rem 0;
      border-bottom: 2px solid transparent;
      transition: var(--transition-base);
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--accent-cyan);
      border-bottom-color: var(--accent-cyan);
    }
    .nav-cta {
      background-color: var(--accent-cyan);
      color: white !important;
      padding: 10px 24px !important;
      border-radius: var(--radius-btn);
      font-weight: 600;
      border: none;
      transition: var(--transition-base);
      box-shadow: 0 4px 12px rgba(0,194,186,0.3);
    }
    .nav-cta:hover {
      background-color: var(--accent-cyan-hover);
      box-shadow: 0 6px 16px rgba(0,194,186,0.4);
      color: white !important;
      border-bottom: none !important;
    }
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.8rem;
      color: var(--primary-deep);
    }
    /* 板块间距 */
    section {
      padding: 100px 0;
    }
    @media (max-width: 768px) {
      section {
        padding: 60px 0;
      }
      body {
        padding-top: 80px;
      }
      .floating-nav {
        padding: 8px 16px;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 20px;
        border-radius: 24px;
        box-shadow: var(--shadow-hover);
        gap: 1rem;
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-menu-toggle {
        display: block;
      }
    }
    /* Hero */
    #hero {
      background: linear-gradient(135deg, #1E2F2A 0%, #162520 100%);
      color: white;
      position: relative;
      overflow: hidden;
      padding: 80px 0;
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 3rem;
    }
    .hero-text {
      flex: 1.2;
    }
    .hero-subtitle {
      color: rgba(255,255,255,0.85);
      font-size: 1.2rem;
      margin: 1.5rem 0 2rem;
    }
    .badge-group {
      display: flex;
      gap: 1.5rem;
      flex-wrap: wrap;
      margin-top: 2rem;
    }
    .stat-badge {
      background: rgba(0,194,186,0.15);
      backdrop-filter: blur(8px);
      border-radius: 20px;
      padding: 16px 24px;
      text-align: center;
      border: 1px solid rgba(0,194,186,0.25);
    }
    .stat-number {
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--accent-cyan);
      line-height: 1.2;
    }
    .stat-label {
      font-size: 0.9rem;
      color: rgba(255,255,255,0.8);
    }
    .hero-image {
      flex: 0.9;
      background: url('/assets/images/coverpic/cover-1.webp') center/cover no-repeat;
      border-radius: 24px;
      min-height: 340px;
      box-shadow: 0 20px 35px rgba(0,0,0,0.5);
      border: 1px solid rgba(255,255,255,0.1);
    }
    .btn-primary-custom {
      background-color: var(--accent-cyan);
      border: none;
      color: white;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: var(--transition-base);
      box-shadow: 0 6px 18px rgba(0,194,186,0.3);
    }
    .btn-primary-custom:hover {
      background-color: var(--accent-cyan-hover);
      box-shadow: 0 8px 22px rgba(0,194,186,0.45);
      transform: translateY(-2px);
      color: white;
    }
    .btn-outline-custom {
      background: transparent;
      border: 2px solid var(--accent-cyan);
      color: var(--accent-cyan);
      padding: 12px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: var(--transition-base);
    }
    .btn-outline-custom:hover {
      background-color: var(--accent-light-bg);
      color: var(--accent-cyan-hover);
    }
    /* 卡片通用 */
    .card-modern {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition-base);
      border: none;
      height: 100%;
    }
    .card-modern:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    /* 指标看板 */
    .metric-value {
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--primary-deep);
      transition: color 0.2s;
    }
    .card-modern:hover .metric-value {
      color: var(--accent-cyan);
    }
    /* 服务卡片图片缩放 */
    .service-img {
      border-radius: 12px;
      height: 180px;
      object-fit: cover;
      transition: transform 0.3s ease;
    }
    .card-modern:hover .service-img {
      transform: scale(1.03);
    }
    /* 对比区块 */
    .compare-traditional {
      background: #f0f2f1;
      border-radius: 16px;
      padding: 24px;
      color: #5a5e5c;
    }
    .compare-pa {
      background: #f0fdfb;
      border-radius: 16px;
      padding: 24px;
      border-left: 6px solid var(--accent-cyan);
    }
    /* 手风琴定制 */
    .accordion-button:not(.collapsed) {
      background-color: transparent;
      color: var(--accent-cyan);
      box-shadow: none;
      font-weight: 600;
    }
    .accordion-item {
      border-radius: 12px !important;
      margin-bottom: 12px;
      border: 1px solid #e0e3e2;
    }
    .accordion-button:focus {
      border-color: var(--accent-cyan);
      box-shadow: 0 0 0 2px rgba(0,194,186,0.2);
    }
    /* 表单 */
    .form-control-custom {
      border-radius: var(--radius-input);
      border: 1px solid var(--border-light);
      padding: 12px 16px;
      background: white;
    }
    .form-control-custom:focus {
      border-color: var(--accent-cyan);
      box-shadow: 0 0 0 3px rgba(0,194,186,0.15);
    }
    .trust-badge img {
      height: 36px;
      opacity: 0.8;
    }
    footer {
      background: var(--primary-deep);
      color: rgba(255,255,255,0.8);
      padding: 60px 0 30px;
    }
    .footer-links a {
      color: rgba(255,255,255,0.75);
      display: block;
      margin-bottom: 8px;
    }
    .footer-links a:hover {
      color: var(--accent-cyan);
    }