/* roulang page: index */
/* :root 设计变量 */
    :root {
      --primary: #0A6E6E;
      --primary-hover: #085858;
      --accent: #F27D42;
      --body-bg: #F8F9FA;
      --card-bg: #FFFFFF;
      --text-main: #1E2B2F;
      --text-secondary: #5F6B7A;
      --border-light: #E9ECEF;
      --shadow-sm: 0 4px 16px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
      --radius-card: 12px;
      --radius-pill: 30px;
      --radius-search: 24px;
      --transition: 0.25s ease;
      --font-stack: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', system-ui, sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-stack);
      background-color: var(--body-bg);
      color: var(--text-main);
      line-height: 1.7;
      margin: 0;
      padding: 0;
      font-size: 16px;
    }

    a {
      color: var(--primary);
      text-decoration: none;
      transition: color var(--transition);
    }

    a:hover {
      color: var(--accent);
    }

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

    button, .button {
      font-family: var(--font-stack);
    }

    /* 容器微调 */
    .grid-container {
      max-width: 1200px;
    }

    /* 导航栏 - 搜索主导型 */
    #masthead {
      background: #FFFFFF;
      box-shadow: 0 2px 8px rgba(0,0,0,0.04);
      position: sticky;
      top: 0;
      z-index: 50;
      padding: 12px 0;
    }

    .nav-grid {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
    }

    .logo-area {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .logo-text {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.5px;
      white-space: nowrap;
    }

    .logo-text span {
      color: var(--accent);
    }

    .search-wrapper {
      flex: 1;
      max-width: 480px;
      margin: 0 24px;
      position: relative;
    }

    .search-wrapper i {
      position: absolute;
      left: 16px;
      top: 50%;
      transform: translateY(-50%);
      color: var(--text-secondary);
      font-size: 1rem;
    }

    #search-input {
      width: 100%;
      height: 44px;
      border-radius: var(--radius-search);
      border: none;
      background: #EEF0F2;
      padding: 0 20px 0 44px;
      font-size: 16px;
      outline: none;
      transition: background var(--transition), box-shadow var(--transition);
    }

    #search-input:focus {
      background: #FFFFFF;
      box-shadow: 0 0 0 3px rgba(10,110,110,0.2);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 24px;
      white-space: nowrap;
    }

    .nav-links a {
      color: var(--text-main);
      font-weight: 500;
      font-size: 1rem;
      transition: color var(--transition);
    }

    .nav-links a:hover {
      color: var(--primary);
    }

    .hamburger {
      display: none;
      background: none;
      border: none;
      font-size: 1.6rem;
      color: var(--text-main);
      cursor: pointer;
    }

    /* Hero */
    #hero {
      background: linear-gradient(135deg, rgba(10,110,110,0.78) 0%, rgba(0,0,0,0.45) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      color: white;
      padding: 100px 0;
      display: flex;
      align-items: center;
      min-height: 480px;
    }

    .hero-title {
      font-size: 40px;
      font-weight: 700;
      letter-spacing: -0.5px;
      margin-bottom: 16px;
      line-height: 1.2;
    }

    .hero-sub {
      font-size: 1.25rem;
      opacity: 0.9;
      margin-bottom: 32px;
    }

    /* 通用板块 */
    .section {
      padding: 80px 0;
    }

    .section-title {
      font-size: 28px;
      font-weight: 600;
      margin-bottom: 16px;
      color: var(--text-main);
    }

    .section-desc {
      color: var(--text-secondary);
      margin-bottom: 40px;
      font-size: 1.1rem;
    }

    /* 卡片系统 */
    .card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      padding: 24px;
      transition: all var(--transition);
      height: 100%;
      border: 1px solid rgba(0,0,0,0.02);
    }

    .card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }

    .pain-card {
      border-left: 5px solid var(--primary);
      padding-left: 20px;
      background: #FFFFFF;
    }

    /* 按钮 */
    .btn-primary {
      background: var(--primary);
      color: white;
      border-radius: var(--radius-pill);
      padding: 12px 28px;
      font-weight: 600;
      display: inline-block;
      transition: background var(--transition), transform var(--transition);
      border: none;
      cursor: pointer;
      font-size: 1rem;
    }

    .btn-primary:hover {
      background: var(--primary-hover);
      color: white;
      transform: translateY(-1px);
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      border-radius: var(--radius-pill);
      padding: 12px 28px;
      font-weight: 600;
      display: inline-block;
      transition: all var(--transition);
    }

    .btn-outline:hover {
      background: var(--primary);
      color: white;
    }

    /* 数据卡 */
    .stat-number {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--primary);
    }

    /* 证言 */
    .testimonial-card {
      position: relative;
      padding-left: 48px;
    }

    .testimonial-card::before {
      content: "“";
      font-size: 64px;
      color: var(--primary);
      opacity: 0.15;
      position: absolute;
      left: 0;
      top: -8px;
      font-weight: 700;
    }

    /* FAQ */
    .accordion-title {
      background: white;
      border-bottom: 1px solid var(--border-light);
      padding: 16px 20px;
      font-weight: 600;
      border-radius: 6px;
      transition: background 0.2s;
    }

    .is-active .accordion-title {
      background: #F0F7F7;
      border-left: 4px solid var(--primary);
    }

    .accordion-content {
      background: white;
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-light);
      color: var(--text-secondary);
    }

    /* CTA 区 */
    #cta {
      background: repeating-linear-gradient(45deg, rgba(10,110,110,0.03) 0px, rgba(10,110,110,0.03) 2px, transparent 2px, transparent 8px);
    }

    /* 页脚 */
    #colophon {
      background: #1E2B2F;
      color: #ADB5BD;
      padding: 48px 0 24px;
    }

    #colophon a {
      color: #ADB5BD;
    }

    #colophon a:hover {
      color: var(--accent);
    }

    .social-circle {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 36px;
      height: 36px;
      background: rgba(255,255,255,0.1);
      border-radius: 50%;
      color: white;
      margin-right: 8px;
      transition: background 0.2s;
    }

    .social-circle:hover {
      background: var(--accent);
    }

    /* 移动端调整 */
    @media (max-width: 1024px) {
      .search-wrapper {
        max-width: 300px;
      }
    }

    @media (max-width: 768px) {
      .nav-grid {
        flex-wrap: wrap;
      }
      .hamburger {
        display: block;
        order: 3;
      }
      .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
        margin-top: 16px;
      }
      .nav-links.active {
        display: flex;
      }
      .search-wrapper {
        order: 2;
        max-width: 100%;
        margin: 0 16px;
        flex: 2;
      }
      .logo-area {
        order: 1;
      }
      .hero-title {
        font-size: 32px;
      }
      .section {
        padding: 56px 0;
      }
      .section-title {
        font-size: 24px;
      }
      #hero {
        padding: 64px 0;
        min-height: 380px;
      }
      .solution-img {
        margin-top: 24px;
      }
    }

    @media (max-width: 520px) {
      .hero-title {
        font-size: 28px;
      }
      .btn-primary, .btn-outline {
        padding: 10px 20px;
        font-size: 0.9rem;
      }
    }