/* roulang page: index */
:root {
      --primary: #E8532E;
      --primary-hover: #C4421F;
      --secondary: #1A1A2E;
      --accent: #00C9A7;
      --bg-light: #F9FAFB;
      --white: #FFFFFF;
      --gray-100: #F3F4F6;
      --gray-200: #E5E7EB;
      --gray-400: #9CA3AF;
      --gray-500: #6B7280;
      --gray-700: #374151;
      --gray-800: #1F2937;
      --border-light: #E5E7EB;
      --shadow-sm: 0 4px 12px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 24px rgba(0,0,0,0.06);
      --shadow-lg: 0 12px 32px rgba(0,0,0,0.1);
      --radius-md: 16px;
      --radius-pill: 50px;
      --font-mono: 'SF Mono', 'JetBrains Mono', 'Inter', monospace;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Inter', system-ui, sans-serif;
      --transition: all 0.25s ease;
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: var(--font-sans);
      background: var(--bg-light);
      color: var(--gray-800);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航 */
    .nav-container {
      background: var(--white);
      height: 72px;
      border-bottom: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      position: sticky;
      top: 0;
      z-index: 50;
      display: flex;
      align-items: center;
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 24px;
      color: var(--secondary);
      text-decoration: none;
    }
    .logo-icon {
      width: 34px;
      height: 34px;
      background: var(--primary);
      clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
      display: inline-block;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 2rem;
      list-style: none;
    }
    .nav-links a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--gray-700);
      text-decoration: none;
      padding: 0.5rem 0;
      border-bottom: 2px solid transparent;
      transition: var(--transition);
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
      border-bottom-color: var(--primary);
    }
    .search-cta-group {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .search-box {
      width: 200px;
      height: 40px;
      background: var(--gray-100);
      border-radius: 20px;
      display: flex;
      align-items: center;
      padding: 0 16px;
      color: var(--gray-400);
      font-size: 0.9rem;
    }
    .btn-primary {
      background: var(--primary);
      color: white;
      border-radius: var(--radius-pill);
      padding: 12px 28px;
      font-weight: 600;
      font-size: 0.95rem;
      border: none;
      cursor: pointer;
      transition: var(--transition);
      display: inline-block;
      text-decoration: none;
      box-shadow: 0 4px 10px rgba(232,83,46,0.25);
    }
    .btn-primary:hover {
      background: var(--primary-hover);
      box-shadow: 0 0 20px rgba(232,83,46,0.45);
      color: white;
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--primary);
      color: var(--primary);
      border-radius: var(--radius-pill);
      padding: 12px 28px;
      font-weight: 600;
      transition: var(--transition);
      text-decoration: none;
    }
    .btn-outline:hover {
      background: #FFF5F2;
      border-color: var(--primary-hover);
      color: var(--primary-hover);
    }
    .hamburger {
      display: none;
      font-size: 1.8rem;
      color: var(--secondary);
    }
    /* Hero */
    .hero-section {
      background: linear-gradient(135deg, #1A1A2E 0%, #16213E 100%);
      position: relative;
      overflow: hidden;
      padding: 100px 0;
    }
    .hero-bg-texture {
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.08;
      pointer-events: none;
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 3rem;
      position: relative;
      z-index: 2;
    }
    .hero-left h1 {
      font-size: 3rem;
      font-weight: 700;
      color: white;
      line-height: 1.2;
      margin-bottom: 1.5rem;
    }
    .hero-sub {
      font-size: 1.15rem;
      color: #CBD5E1;
      margin-bottom: 2rem;
    }
    .micro-badges {
      display: flex;
      gap: 1.5rem;
      margin-bottom: 2rem;
    }
    .badge-item {
      background: rgba(255,255,255,0.1);
      backdrop-filter: blur(8px);
      border-radius: 30px;
      padding: 8px 20px;
      color: white;
      font-weight: 600;
    }
    .badge-item span {
      color: var(--accent);
      font-family: var(--font-mono);
    }
    .glass-card {
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(14px);
      border-radius: 24px;
      padding: 2rem;
      border: 1px solid rgba(255,255,255,0.15);
    }
    .mini-metric {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 1.2rem;
      color: #E5E7EB;
    }
    .mini-metric i { color: var(--accent); }
    /* 指标看板 */
    .metrics-dashboard {
      background: #16213E;
      padding: 70px 0;
    }
    .metric-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 24px;
      text-align: center;
    }
    .metric-card {
      background: rgba(255,255,255,0.06);
      border-radius: 20px;
      padding: 28px 16px;
      backdrop-filter: blur(4px);
    }
    .metric-number {
      font-family: var(--font-mono);
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--accent);
    }
    .metric-label {
      color: #9CA3AF;
      font-size: 0.9rem;
      margin-top: 8px;
    }
    /* 服务网格 */
    .services-section {
      padding: 90px 0;
      background: var(--white);
    }
    .section-title {
      font-size: 2.25rem;
      font-weight: 700;
      color: var(--secondary);
      margin-bottom: 3rem;
      text-align: center;
    }
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 28px;
    }
    .service-card {
      background: var(--white);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-md);
      padding: 2rem;
      border: 1px solid var(--border-light);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: var(--primary);
    }
    .service-img {
      height: 140px;
      background-size: cover;
      background-position: center;
      border-radius: 12px;
      margin-bottom: 1.5rem;
    }
    .service-card h3 {
      font-size: 1.4rem;
      font-weight: 600;
      margin-bottom: 0.75rem;
    }
    .service-desc {
      color: var(--gray-500);
      flex: 1;
    }
    .text-link {
      color: var(--primary);
      font-weight: 600;
      margin-top: 1rem;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    /* 对比区 */
    .compare-section {
      padding: 80px 0;
      background: var(--bg-light);
    }
    .compare-panel {
      display: flex;
      gap: 2rem;
      align-items: center;
    }
    .compare-box {
      flex: 1;
      background: white;
      border-radius: 20px;
      padding: 2rem;
      box-shadow: var(--shadow-sm);
    }
    .vs-badge {
      font-weight: 700;
      font-size: 1.8rem;
      color: var(--primary);
      padding: 0 1rem;
    }
    .before { color: var(--gray-400); }
    .after { color: var(--primary); font-weight: 700; }
    .bar {
      height: 8px;
      background: var(--gray-200);
      border-radius: 4px;
      margin: 12px 0;
    }
    .bar-fill {
      height: 8px;
      background: var(--primary);
      border-radius: 4px;
    }
    /* FAQ */
    .faq-section {
      padding: 80px 0;
      background: white;
    }
    .accordion-title {
      font-size: 1.1rem;
      font-weight: 600;
      background: var(--bg-light);
      border-radius: 10px;
      padding: 16px 20px;
      border: none;
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .accordion-title::before {
      content: "Q";
      background: var(--primary);
      color: white;
      width: 28px;
      height: 28px;
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }
    .accordion-content {
      padding: 20px;
      background: #F9FAFB;
      border-radius: 0 0 12px 12px;
    }
    /* 表单 */
    .contact-section {
      padding: 80px 0;
      background: var(--bg-light);
    }
    .form-card {
      background: white;
      border-radius: 24px;
      padding: 2.5rem;
      box-shadow: var(--shadow-md);
      display: flex;
      gap: 2rem;
    }
    .form-left {
      flex: 2;
    }
    .trust-badges {
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 1.5rem;
    }
    .input-field {
      height: 52px;
      border-radius: 12px;
      border: 1px solid #D1D5DB;
      padding: 0 16px;
      width: 100%;
      margin-bottom: 1rem;
    }
    .input-field:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(232,83,46,0.2);
    }
    .footer-dark {
      background: #1A1A2E;
      color: #CBD5E1;
      padding: 50px 0 20px;
    }
    @media (max-width: 1024px) {
      .metric-grid { grid-template-columns: repeat(2,1fr); }
      .service-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 768px) {
      .nav-links, .search-cta-group .search-box { display: none; }
      .hamburger { display: block; }
      .hero-grid { flex-direction: column; }
      .compare-panel { flex-direction: column; }
      .metric-grid { grid-template-columns: 1fr 1fr; }
      .service-grid { grid-template-columns: 1fr; }
      .form-card { flex-direction: column; }
    }
    @media (max-width: 520px) {
      .hero-left h1 { font-size: 2rem; }
    }