/* roulang page: index */
:root {
      --primary: #E43D2A;
      --primary-dark: #C53030;
      --secondary: #F5A623;
      --secondary-dark: #D4891A;
      --dark-bg: #1A1A2E;
      --darker-bg: #111827;
      --body-bg: #F9FAFB;
      --card-bg: #FFFFFF;
      --text-main: #1F2937;
      --text-muted: #6B7280;
      --text-light: #CBD5E1;
      --border-color: #E5E7EB;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
      --shadow-md: 0 10px 25px rgba(0,0,0,0.1), 0 4px 10px rgba(0,0,0,0.06);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-xl: 50px;
      --font-mono: "SF Mono", "Menlo", "Monaco", "Consolas", monospace;
      --transition: 0.3s ease;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      background-color: var(--body-bg);
      color: var(--text-main);
      line-height: 1.75;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
    }
    
    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-weight: 700;
      letter-spacing: -0.02em;
    }
    
    h1 {
      font-size: 2.5rem;
      line-height: 1.2;
    }
    
    h2 {
      font-size: 1.75rem;
      font-weight: 600;
      margin-bottom: 1rem;
    }
    
    h3 {
      font-size: 1.25rem;
      font-weight: 600;
    }
    
    .text-mono {
      font-family: var(--font-mono);
    }
    
    .section-padding {
      padding: 80px 0;
    }
    
    /* 悬浮胶囊导航 */
    .navbar-capsule {
      position: fixed;
      top: 16px;
      left: 50%;
      transform: translateX(-50%);
      z-index: 1030;
      width: auto;
      max-width: 90vw;
      background: rgba(26, 26, 46, 0.9);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-radius: var(--radius-xl);
      padding: 8px 28px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 28px;
      box-shadow: 0 8px 20px rgba(0,0,0,0.25);
    }
    
    .nav-brand {
      font-weight: 700;
      font-size: 1.25rem;
      color: white;
      white-space: nowrap;
      display: flex;
      align-items: center;
      gap: 6px;
      text-decoration: none;
    }
    .nav-brand i {
      color: var(--secondary);
      font-size: 1.5rem;
    }
    
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
      margin: 0;
      padding: 0;
    }
    
    .nav-links a {
      color: rgba(255,255,255,0.85);
      text-decoration: none;
      font-weight: 500;
      font-size: 0.95rem;
      transition: color var(--transition);
      position: relative;
      padding-bottom: 6px;
      white-space: nowrap;
    }
    
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--secondary);
    }
    
    .nav-links a.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--secondary);
      border-radius: 2px;
      transition: left 0.3s ease;
    }
    
    /* 移动端底部导航 */
    .mobile-bottom-nav {
      display: none;
      position: fixed;
      bottom: 12px;
      left: 50%;
      transform: translateX(-50%);
      z-index: 1030;
      background: rgba(26, 26, 46, 0.9);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-radius: 24px;
      padding: 6px 18px;
      box-shadow: 0 8px 20px rgba(0,0,0,0.3);
      width: auto;
    }
    .mobile-bottom-nav .nav-items {
      display: flex;
      gap: 18px;
      align-items: center;
    }
    .mobile-bottom-nav a {
      color: rgba(255,255,255,0.8);
      text-align: center;
      font-size: 0.7rem;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 4px;
      text-decoration: none;
      font-weight: 500;
      white-space: nowrap;
    }
    .mobile-bottom-nav a i {
      font-size: 1.2rem;
    }
    .mobile-bottom-nav a.active {
      color: var(--secondary);
    }
    
    /* 按钮样式 */
    .btn-primary-custom {
      background: var(--primary);
      border: none;
      color: white;
      font-weight: 600;
      padding: 12px 28px;
      border-radius: var(--radius-sm);
      transition: all 0.25s ease;
      display: inline-block;
      text-decoration: none;
    }
    .btn-primary-custom:hover {
      background: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 8px 18px rgba(228,61,42,0.3);
      color: white;
    }
    
    .btn-outline-custom {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      font-weight: 600;
      padding: 12px 28px;
      border-radius: var(--radius-sm);
      transition: all 0.25s ease;
      text-decoration: none;
    }
    .btn-outline-custom:hover {
      background: rgba(228,61,42,0.08);
      border-color: var(--primary-dark);
      color: var(--primary-dark);
      transform: translateY(-2px);
    }
    
    .btn-gold {
      background: var(--secondary);
      border: none;
      color: #1A1A2E;
      font-weight: 700;
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      transition: all 0.25s ease;
      text-decoration: none;
    }
    .btn-gold:hover {
      background: var(--secondary-dark);
      transform: translateY(-2px);
      box-shadow: 0 8px 18px rgba(245,166,35,0.4);
      color: #1A1A2E;
    }
    
    /* Hero区域 */
    .hero-section {
      background: var(--dark-bg);
      position: relative;
      overflow: hidden;
      min-height: 90vh;
      display: flex;
      align-items: center;
      padding: 120px 0 60px;
    }
    
    .hero-bg-texture {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: repeating-linear-gradient(15deg, rgba(255,255,255,0.02) 0px, rgba(255,255,255,0.02) 2px, transparent 2px, transparent 8px);
      pointer-events: none;
    }
    
    .hero-image {
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      border-radius: var(--radius-md);
      min-height: 350px;
      width: 100%;
      box-shadow: 0 20px 35px rgba(0,0,0,0.3);
      position: relative;
      overflow: hidden;
    }
    .hero-image::after {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: linear-gradient(135deg, rgba(26,26,46,0.4) 0%, rgba(228,61,42,0.1) 100%);
    }
    
    .data-strip {
      background: rgba(0,0,0,0.5);
      backdrop-filter: blur(8px);
      border-radius: var(--radius-md);
      padding: 16px 20px;
      color: white;
    }
    .data-number {
      font-family: var(--font-mono);
      color: var(--secondary);
      font-weight: 700;
      font-size: 1.8rem;
    }
    
    /* 卡片样式 */
    .card-custom {
      background: var(--card-bg);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
      transition: all var(--transition);
      height: 100%;
      overflow: hidden;
    }
    .card-custom:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
    }
    .card-img-top {
      height: 200px;
      object-fit: cover;
      width: 100%;
    }
    
    /* 案例对比卡片 */
    .case-card {
      background: var(--card-bg);
      border-radius: var(--radius-md);
      padding: 24px;
      border-left: 4px dashed var(--border-color);
      margin-bottom: 24px;
    }
    .highlight-gold {
      color: var(--secondary);
      font-weight: 700;
      font-family: var(--font-mono);
      font-size: 1.4rem;
    }
    
    /* FAQ手风琴 */
    .accordion-button:not(.collapsed) {
      background-color: #FEF2F2;
      color: var(--primary);
      box-shadow: none;
      border-left: 4px solid var(--primary);
    }
    .accordion-button:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(228,61,42,0.2);
    }
    .accordion-item {
      border: 1px solid var(--border-color);
      margin-bottom: 0;
    }
    
    /* CTA区域 */
    .cta-section {
      background: var(--dark-bg);
      padding: 80px 0;
    }
    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(228,61,42,0.2);
    }
    
    /* 页脚 */
    .footer {
      background: var(--darker-bg);
      color: #9CA3AF;
      padding: 40px 0;
    }
    
    @media (max-width: 991px) {
      h1 { font-size: 2rem; }
      .navbar-capsule { display: none; }
      .mobile-bottom-nav { display: block; }
      .hero-section { padding: 80px 0 40px; min-height: auto; }
    }
    
    @media (max-width: 767px) {
      h1 { font-size: 1.8rem; }
      h2 { font-size: 1.5rem; }
      .section-padding { padding: 50px 0; }
      .mobile-bottom-nav { width: 95%; }
      .hero-image { min-height: 250px; }
      .data-strip .col { margin-bottom: 10px; }
    }