/* roulang page: index */
@import url('/assets/css/vendor/1ecd1de215-css2.css');
    
    :root {
      --primary-green: #00E676;
      --primary-green-10: rgba(0, 230, 118, 0.10);
      --primary-green-15: rgba(0, 230, 118, 0.15);
      --accent-orange: #FF6D00;
      --accent-orange-dark: #E65100;
      --dark-bg: #1E1E1E;
      --darker-bg: #161616;
      --card-bg: #FFFFFF;
      --section-bg-light: #2C2C2C;
      --text-light: #E0E0E0;
      --text-dark: #1E1E1E;
      --text-muted: #757575;
      --border-light: #E0E0E0;
      --shadow-card: 0 4px 20px rgba(0,0,0,0.08);
      --shadow-card-hover: 0 8px 30px rgba(0,0,0,0.15);
      --shadow-button: 0 4px 12px rgba(255,109,0,0.4);
      --radius-card: 12px;
      --radius-button: 8px;
      --nav-width: 240px;
      --transition-smooth: 0.25s ease;
      --font-numbers: 'Inter', 'Roboto', 'DIN', 'PingFang SC', sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      background-color: var(--dark-bg);
      color: var(--text-light);
      margin: 0;
      padding: 0;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    /* 左侧竖向导航 */
    .side-nav {
      position: fixed;
      left: 0;
      top: 0;
      width: var(--nav-width);
      height: 100vh;
      background-color: var(--darker-bg);
      display: flex;
      flex-direction: column;
      z-index: 1000;
      box-shadow: 2px 0 10px rgba(0,0,0,0.3);
      transition: transform 0.3s ease;
    }

    .nav-logo {
      height: 80px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      font-weight: 700;
      color: var(--primary-green);
      letter-spacing: 0.5px;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }

    .nav-menu {
      flex: 1;
      padding-top: 24px;
    }

    .nav-item {
      display: block;
      height: 48px;
      line-height: 48px;
      padding-left: 24px;
      color: rgba(255,255,255,0.85);
      font-size: 15px;
      font-weight: 500;
      text-decoration: none;
      border-left: 3px solid transparent;
      transition: color 0.2s, border-color 0.2s, background 0.2s;
    }

    .nav-item:hover,
    .nav-item.active {
      color: var(--primary-green);
      border-left-color: var(--primary-green);
      background: rgba(0,230,118,0.05);
    }

    .nav-footer {
      padding: 20px 24px;
      color: #9E9E9E;
      font-size: 12px;
      border-top: 1px solid rgba(255,255,255,0.08);
    }

    /* 主内容区 */
    .main-content {
      margin-left: var(--nav-width);
      width: calc(100% - var(--nav-width));
      min-height: 100vh;
    }

    /* 移动端顶部导航 */
    .mobile-nav {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 56px;
      background-color: var(--darker-bg);
      z-index: 1001;
      align-items: center;
      justify-content: space-between;
      padding: 0 20px;
      box-shadow: 0 2px 8px rgba(0,0,0,0.3);
    }

    .mobile-logo {
      font-size: 20px;
      font-weight: 700;
      color: var(--primary-green);
    }

    .hamburger {
      color: white;
      font-size: 22px;
      background: none;
      border: none;
      cursor: pointer;
    }

    .mobile-menu {
      display: none;
      position: fixed;
      top: 56px;
      left: 0;
      width: 100%;
      background-color: var(--darker-bg);
      flex-direction: column;
      z-index: 1000;
      box-shadow: 0 4px 12px rgba(0,0,0,0.5);
    }

    .mobile-menu a {
      padding: 14px 20px;
      color: rgba(255,255,255,0.85);
      border-bottom: 1px solid rgba(255,255,255,0.08);
      text-decoration: none;
      font-size: 16px;
    }

    .mobile-menu a:hover {
      color: var(--primary-green);
      background: rgba(0,230,118,0.05);
    }

    /* Hero 背景动态点阵 */
    .hero-dot-bg {
      position: relative;
      overflow: hidden;
    }
    .hero-dot-bg::before {
      content: "";
      position: absolute;
      top:0;left:0;right:0;bottom:0;
      background-image: radial-gradient(var(--primary-green-15) 1px, transparent 1px);
      background-size: 30px 30px;
      pointer-events: none;
      z-index: 0;
    }

    /* 卡片样式 */
    .service-card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 24px;
      box-shadow: var(--shadow-card);
      transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
      color: var(--text-dark);
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-card-hover);
    }

    .card-img-placeholder {
      width: 100%;
      height: 140px;
      background-color: #F5F5F5;
      border-radius: 8px;
      margin-bottom: 20px;
      object-fit: cover;
      display: block;
    }

    .metric-highlight {
      font-family: var(--font-numbers);
      font-size: 40px;
      font-weight: 700;
      color: var(--accent-orange);
      line-height: 1.2;
    }

    /* 按钮 */
    .btn-primary {
      background-color: var(--accent-orange);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-button);
      font-weight: 600;
      text-decoration: none;
      display: inline-block;
      transition: background 0.2s, box-shadow 0.2s;
      border: none;
      cursor: pointer;
      font-size: 16px;
    }
    .btn-primary:hover {
      background-color: var(--accent-orange-dark);
      box-shadow: var(--shadow-button);
    }
    .btn-secondary {
      background: transparent;
      color: var(--primary-green);
      border: 2px solid var(--primary-green);
      padding: 12px 28px;
      border-radius: var(--radius-button);
      font-weight: 600;
      text-decoration: none;
      display: inline-block;
      transition: background 0.2s, color 0.2s;
    }
    .btn-secondary:hover {
      background: var(--primary-green-10);
      color: var(--primary-green);
    }

    /* 进度条 */
    .progress-bar {
      height: 8px;
      background: #E0E0E0;
      border-radius: 4px;
      overflow: hidden;
      width: 100%;
    }
    .progress-fill {
      height: 100%;
      background: var(--primary-green);
      border-radius: 4px;
      width: 0%;
    }

    /* FAQ 手风琴 */
    .faq-item {
      border-bottom: 1px solid #E0E0E0;
      padding: 16px 0;
    }
    .faq-question {
      font-weight: 600;
      font-size: 20px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: var(--text-dark);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: #555;
      font-size: 16px;
      line-height: 1.6;
    }
    .faq-item.open .faq-answer {
      max-height: 200px;
      margin-top: 12px;
    }
    .faq-item.open .faq-question i {
      color: var(--primary-green);
    }

    /* 表单 */
    .input-field {
      padding: 12px 16px;
      border: 1px solid #E0E0E0;
      border-radius: var(--radius-button);
      font-size: 16px;
      outline: none;
      transition: border 0.2s;
      width: 100%;
      box-sizing: border-box;
    }
    .input-field:focus {
      border-color: var(--primary-green);
    }

    /* 响应式 */
    @media (max-width: 1024px) {
      .side-nav {
        display: none;
      }
      .main-content {
        margin-left: 0;
        width: 100%;
        padding-top: 56px;
      }
      .mobile-nav {
        display: flex;
      }
      .mobile-menu.active {
        display: flex;
      }
    }

    @media (max-width: 768px) {
      .hero-container {
        flex-direction: column;
      }
      .form-inline {
        flex-direction: column;
      }
    }

    /* 辅助类 */
    .text-green {
      color: var(--primary-green);
    }
    .text-orange {
      color: var(--accent-orange);
    }
    .bg-darker {
      background-color: var(--darker-bg);
    }
    .bg-section {
      background-color: var(--section-bg-light);
    }