/* roulang page: index */
:root {
      --primary-green: #2D6A4F;
      --deep-green: #1B3A2D;
      --rock-gray: #4A4E69;
      --apricot: #F4A261;
      --warm-white: #FEFBF6;
      --card-border: #D8E2DC;
      --light-gray-bg: #F2F2F2;
      --text-muted: #6C757D;
      --border-light: #E9ECEF;
      --shadow-sm: 0 4px 12px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 24px rgba(45,106,79,0.08);
      --border-radius-card: 12px;
      --border-radius-btn: 8px;
      --border-radius-input: 6px;
      --font-stack: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-stack);
      background-color: var(--warm-white);
      color: var(--rock-gray);
      line-height: 1.8;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
    }

    h1, h2, h3, h4, h5, h6 {
      font-weight: 600;
      line-height: 1.4;
      margin-bottom: 1rem;
    }

    h1 {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--deep-green);
    }

    h2 {
      font-size: 1.8rem;
      color: var(--primary-green);
    }

    h3 {
      font-size: 1.25rem;
      color: var(--rock-gray);
      font-weight: 600;
    }

    .text-muted-custom {
      color: var(--text-muted);
      font-size: 0.875rem;
    }

    a {
      color: var(--primary-green);
      text-decoration: none;
      transition: color 0.2s ease;
    }

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

    .container {
      max-width: 1140px;
    }

    /* 按钮重塑 */
    .btn {
      border-radius: var(--border-radius-btn);
      font-weight: 600;
      padding: 0.75rem 1.75rem;
      transition: all 0.2s ease;
      border: 2px solid transparent;
      box-shadow: none;
    }

    .btn-primary-custom {
      background-color: var(--apricot);
      border-color: var(--apricot);
      color: var(--deep-green);
    }

    .btn-primary-custom:hover, .btn-primary-custom:focus {
      background-color: #E07B39;
      border-color: #E07B39;
      color: var(--deep-green);
      box-shadow: 0 4px 12px rgba(244,162,97,0.3);
    }

    .btn-outline-custom {
      background: transparent;
      border: 2px solid var(--primary-green);
      color: var(--primary-green);
    }

    .btn-outline-custom:hover, .btn-outline-custom:focus {
      background-color: var(--primary-green);
      color: white;
      border-color: var(--primary-green);
    }

    /* 卡片重塑 */
    .card {
      border-radius: var(--border-radius-card);
      border: 1px solid var(--card-border);
      background-color: #FFFFFF;
      box-shadow: var(--shadow-sm);
      transition: box-shadow 0.25s ease, transform 0.25s ease;
      overflow: hidden;
    }

    .card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
    }

    .card-body {
      padding: 24px;
    }

    /* 导航重塑 */
    .navbar {
      background-color: #FFFFFF;
      height: 64px;
      box-shadow: 0 1px 4px rgba(0,0,0,0.04);
      padding: 0 1rem;
    }

    .navbar-brand {
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--primary-green) !important;
      letter-spacing: 1px;
    }

    .navbar-brand span {
      font-weight: 400;
      color: var(--rock-gray);
      font-size: 1rem;
      margin-left: 2px;
    }

    .nav-link {
      color: var(--rock-gray) !important;
      font-weight: 500;
      padding: 0.5rem 1rem !important;
      border-bottom: 3px solid transparent;
      transition: color 0.2s, border-color 0.2s;
    }

    .nav-link:hover, .nav-link.active {
      color: var(--primary-green) !important;
      border-bottom-color: var(--apricot);
    }

    .navbar-toggler {
      border: none;
      color: var(--primary-green);
      font-size: 1.5rem;
    }

    .navbar-toggler:focus {
      box-shadow: none;
    }

    /* Mega Menu 面板 */
    .mega-menu-trigger {
      cursor: pointer;
      color: var(--rock-gray);
      font-weight: 500;
      position: relative;
      padding: 0.5rem 0.8rem;
    }

    .mega-panel {
      display: none;
      position: absolute;
      top: 64px;
      right: 0;
      background: white;
      border-radius: 16px;
      box-shadow: 0 15px 35px rgba(0,0,0,0.08);
      padding: 1.5rem;
      width: 650px;
      z-index: 1050;
      border: 1px solid var(--card-border);
      grid-template-columns: 2fr 1.5fr 1.5fr;
      gap: 1.5rem;
    }

    .mega-panel.show {
      display: grid;
    }

    .mega-col h6 {
      color: var(--rock-gray);
      font-size: 0.9rem;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      margin-bottom: 1rem;
    }

    .mega-service-item {
      display: block;
      padding: 0.5rem 0;
      color: var(--rock-gray);
      border-bottom: 1px solid var(--border-light);
    }

    .mega-service-item:hover {
      color: var(--primary-green);
    }

    @media (max-width: 768px) {
      .mega-panel {
        position: static;
        width: 100%;
        box-shadow: none;
        border-radius: 0;
        grid-template-columns: 1fr;
        display: none;
      }
      .mega-panel.show {
        display: block;
      }
    }

    /* Hero 背景覆盖 */
    .hero-section {
      background: linear-gradient(135deg, rgba(45,106,79,0.12) 0%, rgba(27,58,45,0.08) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      background-color: var(--warm-white);
      padding: 5rem 0;
      position: relative;
    }

    .metric-number {
      font-size: 3rem;
      font-weight: 700;
      color: var(--apricot);
      line-height: 1.2;
    }

    /* 服务混合栅格调整 */
    .service-main-card img {
      height: 200px;
      object-fit: cover;
      width: 100%;
    }

    .service-list-item {
      padding: 0.75rem 0;
      border-bottom: 1px solid var(--border-light);
      display: flex;
      align-items: center;
      transition: background 0.2s;
    }

    .service-list-item:hover {
      background-color: rgba(45,106,79,0.03);
    }

    .service-list-item i {
      color: var(--primary-green);
      width: 24px;
      margin-right: 12px;
    }

    /* 对比卡片 */
    .before-card {
      background-color: var(--light-gray-bg);
      border: 1px solid #dee2e6;
    }

    .after-card {
      background-color: #FFFFFF;
      border: 1px solid var(--primary-green);
      box-shadow: var(--shadow-sm);
    }

    .data-point {
      list-style: none;
      padding-left: 0;
    }

    .data-point li::before {
      content: "●";
      color: var(--apricot);
      font-weight: bold;
      display: inline-block;
      width: 1.2em;
      margin-left: -1em;
    }

    /* FAQ 手风琴自定义 */
    .accordion-button {
      font-weight: 600;
      color: var(--deep-green);
      background-color: transparent;
      box-shadow: none;
      border: none;
      font-size: 1.1rem;
      padding: 1rem 0;
    }

    .accordion-button:not(.collapsed) {
      color: var(--primary-green);
      background-color: transparent;
      box-shadow: none;
      border-bottom: 1px dashed var(--primary-green);
    }

    .accordion-button:focus {
      outline: 2px dashed var(--primary-green);
      outline-offset: 4px;
      box-shadow: none;
    }

    .accordion-item {
      border: none;
      border-bottom: 1px solid var(--border-light);
      background: transparent;
    }

    .accordion-body {
      padding: 1rem 0 1.5rem;
      line-height: 1.8;
      color: var(--rock-gray);
    }

    /* 表单 */
    .form-control {
      border-radius: var(--border-radius-input);
      border: 1px solid #CED4DA;
      padding: 0.75rem 1rem;
      transition: border-color 0.2s;
    }

    .form-control:focus {
      border-color: var(--primary-green);
      box-shadow: none;
      outline: 0;
    }

    /* 页脚 */
    footer {
      background-color: var(--deep-green);
      color: var(--warm-white);
      padding: 3rem 0 1.5rem;
    }

    footer h5 {
      color: var(--apricot);
      font-weight: 600;
    }

    footer a {
      color: rgba(254,251,246,0.8);
      text-decoration: none;
    }

    footer a:hover {
      color: var(--apricot);
    }

    .copyright {
      border-top: 1px solid rgba(254,251,246,0.2);
      margin-top: 2rem;
      padding-top: 1.5rem;
      font-size: 0.9rem;
      color: rgba(254,251,246,0.7);
    }

    @media (max-width: 768px) {
      h1 { font-size: 2rem; }
      h2 { font-size: 1.6rem; }
      .hero-section { padding: 3rem 0; }
      .metric-number { font-size: 2.2rem; }
    }