/* roulang page: index */
:root {
      --primary-deep: #0A0E27;
      --accent-cyan: #00F0FF;
      --secondary-pink: #FF3D71;
      --bg-light: #F4F6FA;
      --card-white: #FFFFFF;
      --text-dark: #2C3E50;
      --text-muted: #7B8A9B;
      --border-light: #E0E6ED;
      --radius-card: 16px;
      --radius-btn: 8px;
      --radius-nav: 50px;
      --shadow-card: 0 8px 30px rgba(10, 14, 39, 0.04);
      --shadow-card-hover: 0 16px 40px rgba(10, 14, 39, 0.08);
      --font-inter: "Inter", "SF Pro Text", "PingFang SC", "Microsoft YaHei", sans-serif;
      --transition-smooth: all 0.25s ease;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-inter);
      color: var(--text-dark);
      background-color: var(--bg-light);
      line-height: 1.7;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
    }
    
    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-weight: 600;
      letter-spacing: -0.5px;
    }
    
    a {
      text-decoration: none;
      transition: var(--transition-smooth);
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    /* 自定义容器微调 */
    .container-custom {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    
    /* 导航栏：悬浮胶囊 */
    .navbar-capsule {
      position: fixed;
      top: 16px;
      left: 50%;
      transform: translateX(-50%);
      width: auto;
      max-width: 95%;
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-radius: var(--radius-nav);
      padding: 8px 28px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: 0 4px 20px rgba(10, 14, 39, 0.08);
      z-index: 1000;
      transition: var(--transition-smooth);
    }
    
    .navbar-brand-custom {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--primary-deep);
      letter-spacing: -0.5px;
      line-height: 1.2;
    }
    .navbar-brand-custom span {
      color: var(--accent-cyan);
    }
    
    .nav-links {
      display: flex;
      gap: 2rem;
      align-items: center;
    }
    
    .nav-link-item {
      color: var(--text-dark);
      font-weight: 500;
      font-size: 0.95rem;
      padding: 0.25rem 0;
      position: relative;
      white-space: nowrap;
    }
    
    .nav-link-item::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--accent-cyan);
      transition: width 0.2s ease;
    }
    
    .nav-link-item:hover {
      color: var(--accent-cyan);
    }
    .nav-link-item:hover::after {
      width: 100%;
    }
    
    /* 移动端底部导航 */
    @media (max-width: 768px) {
      .navbar-capsule {
        top: auto;
        bottom: 16px;
        left: 50%;
        transform: translateX(-50%);
        width: max-content;
        padding: 10px 24px;
        border-radius: 40px;
        background: rgba(10, 14, 39, 0.9);
        backdrop-filter: blur(20px);
        box-shadow: 0 8px 25px rgba(0,0,0,0.3);
      }
      .navbar-brand-custom {
        color: white;
        font-size: 1.2rem;
      }
      .nav-links {
        gap: 1.2rem;
      }
      .nav-link-item {
        color: rgba(255,255,255,0.85);
        font-size: 0.8rem;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 4px;
      }
      .nav-link-item i {
        font-size: 1.2rem;
      }
      .nav-link-item:hover {
        color: var(--accent-cyan);
      }
      .desktop-only {
        display: none;
      }
    }
    
    @media (min-width: 769px) {
      .mobile-icon {
        display: none;
      }
      .nav-link-item i {
        display: none;
      }
    }
    
    /* Hero 区域 */
    .hero-section {
      background-color: var(--primary-deep);
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-blend-mode: overlay;
      position: relative;
      padding: 140px 0 100px;
      color: white;
      overflow: hidden;
    }
    
    .hero-section::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: radial-gradient(circle at 30% 40%, rgba(0,240,255,0.08) 0%, transparent 50%);
      pointer-events: none;
    }
    
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 3rem;
    }
    
    .hero-left {
      flex: 1 1 50%;
      position: relative;
      z-index: 2;
    }
    
    .hero-right {
      flex: 1 1 50%;
      display: flex;
      flex-wrap: wrap;
      gap: 20px;
      justify-content: flex-end;
    }
    
    .metric-card {
      background: rgba(255,255,255,0.06);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: var(--radius-card);
      padding: 24px 20px;
      width: calc(50% - 10px);
      text-align: center;
      transition: var(--transition-smooth);
    }
    
    .metric-number {
      font-family: 'Inter', 'DIN Alternate', sans-serif;
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--accent-cyan);
      letter-spacing: -0.5px;
      margin-bottom: 8px;
    }
    
    .metric-label {
      color: rgba(255,255,255,0.8);
      font-size: 0.9rem;
    }
    
    h1 {
      font-size: 3.2rem;
      font-weight: 700;
      letter-spacing: -1px;
      color: white;
      line-height: 1.2;
    }
    
    .btn-primary-bwin {
      background: var(--accent-cyan);
      border: none;
      color: var(--primary-deep);
      font-weight: 700;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      transition: var(--transition-smooth);
      box-shadow: 0 0 15px rgba(0,240,255,0.3);
    }
    .btn-primary-bwin:hover {
      background: #33F5FF;
      box-shadow: 0 0 25px rgba(0,240,255,0.6);
      color: var(--primary-deep);
    }
    
    .btn-outline-bwin {
      background: transparent;
      border: 2px solid white;
      color: white;
      font-weight: 600;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
    }
    .btn-outline-bwin:hover {
      border-color: var(--accent-cyan);
      color: var(--accent-cyan);
    }
    
    /* 服务卡片 */
    .service-card {
      background: var(--card-white);
      border-radius: var(--radius-card);
      padding: 28px 20px;
      box-shadow: var(--shadow-card);
      transition: var(--transition-smooth);
      height: 100%;
      border: 1px solid transparent;
    }
    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-card-hover);
      border-color: var(--accent-cyan);
    }
    .chart-mini {
      background: #f0f4fc;
      height: 60px;
      border-radius: 8px;
      margin-bottom: 20px;
      display: flex;
      align-items: flex-end;
      gap: 6px;
      padding: 8px;
    }
    .bar {
      background: var(--accent-cyan);
      width: 20%;
      height: 70%;
      border-radius: 4px 4px 0 0;
    }
    .bar.pink {
      background: var(--secondary-pink);
      height: 45%;
    }
    
    /* 对比区域 */
    .compare-box {
      background: white;
      border-radius: var(--radius-card);
      padding: 30px;
      box-shadow: var(--shadow-card);
    }
    .negative {
      color: var(--secondary-pink);
    }
    .positive {
      color: var(--accent-cyan);
      font-weight: 700;
    }
    
    /* FAQ */
    .faq-item {
      border-bottom: 1px solid var(--border-light);
    }
    .faq-question {
      font-weight: 600;
      padding: 18px 0;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 12px;
      transition: 0.2s;
    }
    .faq-question:hover {
      color: var(--accent-cyan);
    }
    
    /* 表单 */
    .form-control-custom {
      border-radius: var(--radius-btn);
      border: 1px solid var(--border-light);
      padding: 12px 16px;
    }
    
    footer {
      background: var(--primary-deep);
      color: var(--text-muted);
    }
    
    @media (max-width: 992px) {
      .hero-grid {
        flex-direction: column;
      }
      .hero-right {
        justify-content: center;
      }
      h1 {
        font-size: 2.5rem;
      }
    }