/* roulang page: index */
:root {
      --primary: #E8451E;
      --primary-hover: #C93A16;
      --secondary: #1C1C1E;
      --bg-warm: #F7F5F2;
      --accent-gold: #F5B642;
      --text-dark: #2D2D2D;
      --text-muted: #6B6B6B;
      --white: #FFFFFF;
      --card-bg: #FFFFFF;
      --card-bg-light: #FAF9F7;
      --border-light: #EAE7E2;
      --border-radius-card: 16px;
      --border-radius-btn: 8px;
      --border-radius-input: 8px;
      --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
      --shadow-hover: 0 8px 24px rgba(232,69,30,0.12);
      --font-title: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      --nav-height: 72px;
      --section-padding: 80px;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-body);
      font-size: 16px;
      line-height: 1.75;
      color: var(--text-dark);
      background-color: var(--white);
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }
    
    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-family: var(--font-title);
      font-weight: 700;
      letter-spacing: -0.02em;
    }
    
    h1 {
      font-size: 3rem;
      line-height: 1.2;
      font-weight: 700;
    }
    
    h2 {
      font-size: 2.25rem;
      line-height: 1.3;
      font-weight: 700;
    }
    
    h3 {
      font-size: 1.75rem;
      line-height: 1.4;
      font-weight: 600;
    }
    
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s ease, background-color 0.2s ease;
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    .container {
      max-width: 1200px;
      padding-left: 20px;
      padding-right: 20px;
    }
    
    /* 导航 */
    .navbar {
      height: var(--nav-height);
      background-color: rgba(28, 28, 30, 0.92);
      backdrop-filter: blur(16px);
      box-shadow: 0 4px 20px rgba(0,0,0,0.08);
      padding: 0;
      transition: all 0.3s ease;
    }
    
    .navbar-brand {
      font-family: var(--font-title);
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--white) !important;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    
    .navbar-brand .logo-icon {
      font-size: 1.8rem;
      color: var(--primary);
    }
    
    .nav-link {
      color: rgba(255,255,255,0.85) !important;
      font-weight: 500;
      padding: 0.5rem 1rem !important;
      margin: 0 0.2rem;
      border-bottom: 3px solid transparent;
      transition: all 0.2s;
    }
    
    .nav-link:hover, .nav-link.active {
      color: var(--white) !important;
      border-bottom-color: var(--primary);
      font-weight: 700;
    }
    
    .navbar .btn-primary-custom {
      background-color: var(--primary);
      border: none;
      color: white;
      padding: 0.5rem 1.5rem;
      border-radius: var(--border-radius-btn);
      font-weight: 600;
      height: 40px;
      display: flex;
      align-items: center;
      transition: all 0.25s;
    }
    
    .navbar .btn-primary-custom:hover {
      background-color: var(--primary-hover);
      transform: translateY(-1px);
    }
    
    .badge-season {
      background-color: var(--accent-gold);
      color: var(--secondary);
      font-weight: 700;
      font-size: 0.8rem;
      padding: 0.25rem 0.8rem;
      border-radius: 20px;
      margin-left: 10px;
    }
    
    /* Hero */
    .hero {
      min-height: 90vh;
      background: linear-gradient(90deg, rgba(28,28,30,0.82) 0%, rgba(28,28,30,0.5) 60%), url('/assets/images/backpic/back-1.webp') center center/cover no-repeat;
      display: flex;
      align-items: center;
      position: relative;
      color: white;
      padding-top: var(--nav-height);
    }
    
    .hero-content {
      max-width: 680px;
    }
    
    .hero h1 {
      color: white;
      margin-bottom: 1.25rem;
    }
    
    .hero .lead {
      font-size: 1.25rem;
      color: rgba(255,255,255,0.9);
      max-width: 520px;
      margin-bottom: 2rem;
    }
    
    .btn-hero-primary {
      background-color: var(--primary);
      border: none;
      color: white;
      padding: 0.9rem 2.2rem;
      border-radius: var(--border-radius-btn);
      font-weight: 700;
      font-size: 1.1rem;
      box-shadow: 0 6px 18px rgba(232,69,30,0.3);
      transition: all 0.25s;
    }
    
    .btn-hero-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 12px 24px rgba(232,69,30,0.4);
    }
    
    .btn-hero-outline {
      background: transparent;
      border: 2px solid white;
      color: white;
      padding: 0.85rem 2.2rem;
      border-radius: var(--border-radius-btn);
      font-weight: 700;
      margin-left: 16px;
      transition: all 0.25s;
    }
    
    .btn-hero-outline:hover {
      background-color: white;
      color: var(--secondary);
    }
    
    .floating-stats {
      position: absolute;
      bottom: 40px;
      right: 40px;
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }
    
    .stat-badge {
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(8px);
      border-radius: 16px;
      padding: 16px 24px;
      color: var(--secondary);
      font-weight: 700;
      box-shadow: 0 8px 20px rgba(0,0,0,0.1);
      text-align: center;
    }
    
    .stat-badge span {
      font-size: 2rem;
      color: var(--primary);
      display: block;
      line-height: 1.2;
    }
    
    /* 通用区块 */
    section {
      padding: var(--section-padding) 0;
    }
    
    .section-bg {
      background-color: var(--bg-warm);
    }
    
    .section-title {
      margin-bottom: 3rem;
    }
    
    /* 卡片通用 */
    .custom-card {
      background: var(--card-bg);
      border-radius: var(--border-radius-card);
      padding: 2rem 1.5rem;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      border: 1px solid var(--border-light);
      height: 100%;
    }
    
    .custom-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    
    .icon-circle {
      width: 64px;
      height: 64px;
      background-color: rgba(232,69,30,0.08);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 2rem;
      margin-bottom: 1.25rem;
    }
    
    /* 服务体系图文交替 */
    .service-row {
      margin-bottom: 3.5rem;
    }
    
    .service-img {
      border-radius: var(--border-radius-card);
      box-shadow: var(--shadow-sm);
    }
    
    /* 数据区 */
    .data-number {
      font-size: 3rem;
      font-weight: 700;
      color: var(--primary);
      line-height: 1.2;
    }
    
    /* 案例卡片 */
    .case-card {
      border-radius: var(--border-radius-card);
      overflow: hidden;
      background: white;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s;
    }
    
    .case-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-5px);
    }
    
    .case-img {
      height: 200px;
      object-fit: cover;
    }
    
    /* 方案卡片 */
    .pricing-card {
      border: 2px solid var(--border-light);
      border-radius: var(--border-radius-card);
      padding: 2rem;
      background: white;
      transition: all 0.3s;
      position: relative;
    }
    
    .pricing-card.popular {
      border-color: var(--accent-gold);
      box-shadow: 0 12px 24px rgba(245,182,66,0.18);
    }
    
    .badge-popular {
      background: var(--accent-gold);
      color: var(--secondary);
      font-weight: 700;
      padding: 0.25rem 1rem;
      border-radius: 20px;
      position: absolute;
      top: -12px;
      right: 20px;
    }
    
    .price {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--primary);
    }
    
    /* FAQ */
    .accordion-button:not(.collapsed) {
      background-color: rgba(232,69,30,0.05);
      color: var(--primary);
      font-weight: 700;
    }
    
    .accordion-button:focus {
      box-shadow: 0 0 0 0.25rem rgba(232,69,30,0.2);
      border-color: var(--primary);
    }
    
    /* CTA横幅 */
    .cta-banner {
      background: linear-gradient(135deg, #1C1C1E 0%, #2A2A2E 100%);
      color: white;
      border-radius: var(--border-radius-card);
      padding: 3.5rem 2rem;
    }
    
    /* 页脚 */
    footer {
      background-color: var(--secondary);
      color: rgba(255,255,255,0.8);
      padding: 3rem 0 1.5rem;
    }
    
    footer a:hover {
      color: var(--primary);
      text-decoration: underline;
    }
    
    .social-icon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 40px;
      height: 40px;
      border: 1px solid rgba(255,255,255,0.3);
      border-radius: 50%;
      color: white;
      margin-right: 8px;
      transition: 0.2s;
    }
    
    .social-icon:hover {
      background-color: var(--primary);
      border-color: var(--primary);
    }
    
    @media (max-width: 992px) {
      h1 { font-size: 2.5rem; }
      h2 { font-size: 1.9rem; }
      .hero { min-height: 80vh; }
      .floating-stats { position: static; margin-top: 2rem; justify-content: center; }
      .navbar .btn-primary-custom { margin-left: 0; }
    }
    
    @media (max-width: 768px) {
      section { padding: 48px 0; }
      h1 { font-size: 2.2rem; }
      .service-row .col-md-6:first-child { margin-bottom: 1.5rem; }
      .pricing-card { margin-bottom: 1.5rem; }
    }