/* roulang page: index */
:root {
      --deep-blue: #0B1A2F;
      --electric-cyan: #00E5FF;
      --amber-orange: #FF6D00;
      --cyanish-white: #E0F0FF;
      --soft-gray: #90A4AE;
      --card-bg: rgba(255,255,255,0.05);
      --border-glow: rgba(0,229,255,0.2);
      --glass-bg: rgba(255,255,255,0.03);
      --glass-border: rgba(255,255,255,0.15);
      --glow-cyan: 0 0 15px rgba(0,229,255,0.5);
      --glow-amber: 0 0 12px rgba(255,109,0,0.5);
      --text-shadow-cyan: 0 0 8px rgba(0,229,255,0.7);
      --hover-float: translateY(-4px);
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
      background-color: var(--deep-blue);
      color: var(--cyanish-white);
      line-height: 1.7;
      margin: 0;
      overflow-x: hidden;
    }

    .container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    @media (max-width: 768px) {
      .container {
        padding-left: 16px;
        padding-right: 16px;
      }
      .section-space {
        padding-top: 60px;
        padding-bottom: 60px;
      }
    }

    .section-space {
      padding-top: 100px;
      padding-bottom: 100px;
    }

    /* 导航栏样式 */
    .navbar {
      background: rgba(11, 26, 47, 0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(0, 229, 255, 0.25);
      height: 72px;
      display: flex;
      align-items: center;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 50;
      transition: all 0.3s ease;
    }

    .nav-link {
      color: #B0C4DE;
      text-decoration: none;
      font-weight: 500;
      padding: 0.5rem 0;
      margin: 0 1rem;
      position: relative;
      transition: color 0.2s;
      white-space: nowrap;
    }

    .nav-link:hover,
    .nav-link.active {
      color: var(--electric-cyan);
    }

    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--electric-cyan);
      box-shadow: 0 0 10px rgba(0,229,255,0.8);
      border-radius: 2px;
    }

    .logo-text {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--electric-cyan);
      letter-spacing: 0.5px;
      text-shadow: 0 0 8px rgba(0,229,255,0.4);
      text-decoration: none;
    }

    /* 移动端菜单 */
    .mobile-menu {
      background: rgba(11, 26, 47, 0.95);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
    }

    /* 卡片玻璃拟态 */
    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid var(--glass-border);
      border-radius: 16px;
      box-shadow: 0 4px 20px rgba(0,0,0,0.4);
      transition: all 0.3s ease;
    }

    .glass-card:hover {
      transform: var(--hover-float);
      border-color: var(--electric-cyan);
      box-shadow: 0 8px 30px rgba(0,229,255,0.15);
    }

    /* 发光按钮 */
    .btn-primary {
      background-color: var(--electric-cyan);
      color: var(--deep-blue);
      font-weight: 600;
      padding: 0.75rem 2rem;
      border-radius: 8px;
      border: none;
      cursor: pointer;
      transition: all 0.2s;
      box-shadow: 0 0 15px rgba(0,229,255,0.5);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      text-decoration: none;
    }

    .btn-primary:hover {
      filter: brightness(1.2);
      box-shadow: 0 0 25px rgba(0,229,255,0.8);
      transform: scale(1.02);
    }

    .btn-secondary {
      background: transparent;
      border: 1px solid var(--electric-cyan);
      color: var(--electric-cyan);
      font-weight: 600;
      padding: 0.75rem 2rem;
      border-radius: 8px;
      cursor: pointer;
      transition: all 0.2s;
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .btn-secondary:hover {
      background: rgba(0,229,255,0.1);
      box-shadow: 0 0 15px rgba(0,229,255,0.3);
    }

    /* 指标数字动画 */
    @keyframes countPulse {
      0% { text-shadow: 0 0 5px rgba(0,229,255,0.4); }
      50% { text-shadow: 0 0 20px rgba(0,229,255,0.9); }
      100% { text-shadow: 0 0 5px rgba(0,229,255,0.4); }
    }

    .metric-number {
      font-size: 48px;
      font-weight: 700;
      color: var(--electric-cyan);
      text-shadow: 0 0 15px rgba(0,229,255,0.6);
      animation: countPulse 2s infinite;
      line-height: 1.2;
    }

    /* 对比表格样式 */
    .compare-check {
      color: var(--electric-cyan);
      font-weight: bold;
      font-size: 1.25rem;
    }
    .compare-cross {
      color: #607D8B;
      font-weight: bold;
      font-size: 1.25rem;
    }
    .compare-row-emc {
      background: rgba(0,229,255,0.05);
    }

    /* FAQ手风琴 */
    .faq-item {
      border-radius: 12px;
      overflow: hidden;
      margin-bottom: 12px;
      background: rgba(255,255,255,0.03);
      border: 1px solid rgba(255,255,255,0.08);
    }
    .faq-question {
      background: rgba(255,255,255,0.03);
      padding: 1.25rem 1.5rem;
      cursor: pointer;
      font-weight: 600;
      font-size: 1.1rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: background 0.2s;
    }
    .faq-question:hover {
      background: rgba(0,229,255,0.05);
    }
    .faq-answer {
      padding: 0 1.5rem 1.25rem;
      color: #B0C4DE;
      display: none;
      line-height: 1.7;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .faq-item.active .faq-question {
      border-left: 3px solid var(--electric-cyan);
      background: rgba(0,229,255,0.08);
    }
    .faq-icon {
      font-size: 1.5rem;
      transition: transform 0.2s;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    /* 表单聚焦 */
    input:focus, select:focus, textarea:focus {
      outline: none;
      border-color: var(--electric-cyan) !important;
      box-shadow: 0 0 10px rgba(0,229,255,0.4);
    }

    /* 背景图占位区域 */
    .hero-bg-visual {
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
    }

    .service-icon-placeholder {
      background-image: url('/assets/images/coverpic/cover-2.webp');
      background-size: cover;
      background-position: center;
      width: 64px;
      height: 64px;
      border-radius: 12px;
      background-blend-mode: overlay;
      background-color: rgba(0,229,255,0.2);
    }

    @media (max-width: 768px) {
      .metric-number {
        font-size: 36px;
      }
      .navbar {
        height: 64px;
      }
    }