/* roulang page: index */
:root {
      --primary: #FF4D2E;
      --primary-dark: #E6391D;
      --secondary: #1A1A2E;
      --accent: #F0A500;
      --bg-light: #F8F9FA;
      --text-main: #212529;
      --text-muted: #6C757D;
      --white: #FFFFFF;
      --success: #00C853;
      --border-radius-lg: 24px;
      --border-radius-md: 12px;
      --border-radius-sm: 8px;
      --shadow-card: 0 4px 20px rgba(0,0,0,0.06);
      --shadow-hover: 0 12px 32px rgba(255,77,46,0.15);
      --bs-primary: #FF4D2E;
      --bs-primary-rgb: 255,77,46;
      --bs-body-font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--bs-body-font-family);
      color: var(--text-main);
      background-color: var(--bg-light);
      line-height: 1.7;
      margin: 0;
      padding-top: 76px;
      overflow-x: hidden;
    }

    /* 自定义导航 */
    .navbar {
      background-color: rgba(255,255,255,0.96);
      backdrop-filter: blur(10px);
      box-shadow: 0 2px 20px rgba(0,0,0,0.04);
      padding: 0.8rem 0;
      transition: all 0.3s ease;
    }
    .navbar-brand {
      font-size: 1.7rem;
      font-weight: 700;
      background: linear-gradient(135deg, var(--primary) 0%, #D81B1B 80%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      display: flex;
      align-items: center;
      gap: 6px;
      letter-spacing: 1px;
    }
    .navbar-brand i {
      background: none;
      -webkit-text-fill-color: var(--primary);
      font-size: 2rem;
    }
    .navbar-nav .nav-link {
      color: var(--text-main) !important;
      font-weight: 500;
      margin: 0 0.8rem;
      transition: color 0.2s;
      font-size: 0.95rem;
    }
    .navbar-nav .nav-link:hover,
    .navbar-nav .nav-link.active {
      color: var(--primary) !important;
    }
    .btn-cta-nav {
      background: var(--primary);
      color: var(--white) !important;
      border-radius: var(--border-radius-md);
      padding: 12px 28px;
      font-weight: 700;
      font-size: 1rem;
      border: none;
      box-shadow: 0 4px 14px rgba(255,77,46,0.4);
      transition: all 0.25s;
      white-space: nowrap;
    }
    .btn-cta-nav:hover {
      background: var(--primary-dark);
      color: white;
      transform: translateY(-2px);
      box-shadow: 0 8px 22px rgba(255,77,46,0.5);
    }
    .navbar-toggler {
      border: none;
      color: var(--primary);
    }
    .navbar-toggler:focus {
      box-shadow: 0 0 0 2px var(--primary);
    }
    @media (max-width: 992px) {
      .navbar-nav {
        background: white;
        padding: 1rem;
        border-radius: 16px;
        box-shadow: var(--shadow-card);
        margin-top: 0.8rem;
      }
      .navbar .btn-cta-nav {
        display: inline-block;
        margin-left: 0.8rem;
      }
    }

    /* Hero区域 */
    .hero-section {
      background: linear-gradient(135deg, rgba(26,26,46,0.75) 0%, rgba(20,20,35,0.8) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 85vh;
      display: flex;
      align-items: center;
      color: white;
      position: relative;
    }
    .hero-content h1 {
      font-size: 3.5rem;
      font-weight: 800;
      line-height: 1.2;
      background: linear-gradient(to right, #FF4D2E, #FFA800);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .hero-content .lead {
      font-size: 1.3rem;
      color: rgba(255,255,255,0.85);
      max-width: 600px;
    }
    .badge-hero {
      background: rgba(255,77,46,0.15);
      backdrop-filter: blur(8px);
      border-radius: 20px;
      padding: 0.7rem 1.8rem;
      color: white;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 1rem;
      border: 1px solid rgba(255,77,46,0.25);
    }
    .stat-badge {
      display: flex;
      gap: 2rem;
      flex-wrap: wrap;
      margin-top: 2rem;
    }
    @media (max-width: 768px) {
      .hero-content h1 {
        font-size: 2.5rem;
      }
    }

    /* 区块标题 */
    .section-title h2 {
      font-size: 2.4rem;
      font-weight: 700;
      position: relative;
      display: inline-block;
      margin-bottom: 1rem;
    }
    .section-title h2::after {
      content: '';
      position: absolute;
      left: 50%;
      bottom: -12px;
      transform: translateX(-50%);
      width: 70px;
      height: 4px;
      background: var(--accent);
      border-radius: 2px;
    }

    /* 数据看板 */
    .stats-card {
      background: white;
      border-radius: var(--border-radius-lg);
      padding: 2.5rem;
      box-shadow: var(--shadow-card);
    }
    .stat-item i {
      font-size: 2.3rem;
      color: var(--primary);
      background: rgba(255,77,46,0.08);
      padding: 14px;
      border-radius: 16px;
    }
    .stat-number {
      font-family: 'Inter', 'Roboto', sans-serif;
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--accent);
    }

    /* 服务卡片 */
    .service-card {
      background: white;
      border-radius: var(--border-radius-lg);
      padding: 2rem 1.8rem;
      box-shadow: var(--shadow-card);
      transition: all 0.25s ease;
      border: 1px solid transparent;
      height: 100%;
    }
    .service-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-hover);
      border-top: 4px solid var(--primary);
    }
    .service-icon {
      width: 64px;
      height: 64px;
      background: rgba(255,77,46,0.1);
      border-radius: 18px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 2rem;
    }

    /* 对比区 */
    .compare-bad {
      background: #f1f3f5;
      border-radius: var(--border-radius-lg);
    }
    .compare-good {
      background: white;
      border: 2px solid var(--primary);
      border-radius: var(--border-radius-lg);
    }
    .vs-badge {
      background: var(--accent);
      width: 70px;
      height: 70px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.6rem;
      color: #1A1A2E;
    }

    /* FAQ手风琴重塑 */
    .accordion-button {
      font-weight: 600;
      background: white;
      border-radius: 12px !important;
      box-shadow: none;
      padding: 1.2rem 1.5rem;
    }
    .accordion-item {
      border: none;
      margin-bottom: 12px;
      background: transparent;
      border-radius: 12px !important;
    }
    .accordion-button:not(.collapsed) {
      background-color: rgba(255,77,46,0.04);
      color: var(--primary);
      box-shadow: none;
    }
    .accordion-button:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(255,77,46,0.15);
    }

    /* CTA表单区 */
    .cta-section {
      background: var(--secondary);
      border-radius: 0;
    }
    .form-control {
      border-radius: var(--border-radius-sm);
      border: 1px solid #ddd;
      padding: 0.8rem 1.2rem;
      font-size: 1rem;
    }
    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 0.2rem rgba(255,77,46,0.2);
    }
    .btn-submit {
      background: var(--accent);
      color: #1A1A2E;
      font-weight: 700;
      padding: 0.9rem 2rem;
      border-radius: var(--border-radius-md);
      border: none;
      transition: 0.2s;
    }
    .btn-submit:hover {
      background: #ffb52e;
    }

    footer {
      background: #0f0f1c;
      color: #ccc;
    }
    footer a {
      color: #adb5bd;
      text-decoration: none;
    }
    footer a:hover {
      color: var(--primary);
    }