/* roulang page: index */
* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    :root {
      --deep-space: #0B0E14;
      --orange-flame: #FF4D2E;
      --orange-deep: #E03A1C;
      --space-gray: #1A1F2B;
      --cool-white: #F2F4F8;
      --victory-gold: #D4A843;
      --track-green: #00C897;
      --text-light: #E0E4EB;
      --text-muted: #B0B8C1;
      --border-subtle: rgba(255, 77, 46, 0.15);
      --border-active: #FF4D2E;
      --shadow-card: 0 4px 20px rgba(0,0,0,0.3);
      --shadow-hover: 0 12px 32px rgba(255,77,46,0.2);
      --radius-lg: 12px;
      --radius-md: 8px;
      --radius-pill: 50px;
      --font-heading: 'Inter', 'PingFang SC', system-ui, -apple-system, sans-serif;
      --transition: all 0.3s ease;
    }

    body {
      font-family: 'Inter', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
      background-color: var(--deep-space);
      color: var(--text-light);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 40px;
    }

    img {
      max-width: 100%;
      display: block;
    }

    a {
      text-decoration: none;
      color: inherit;
    }

    button, input, textarea {
      font-family: inherit;
    }

    /* 导航栏 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(11, 14, 20, 0.85);
      backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(255, 77, 46, 0.5);
      transition: background 0.3s ease, box-shadow 0.3s ease;
    }

    .navbar.scrolled {
      background: rgba(11, 14, 20, 1);
      box-shadow: 0 8px 24px rgba(0,0,0,0.6);
      border-bottom-color: var(--orange-flame);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 40px;
      height: 72px;
      max-width: 1280px;
      margin: 0 auto;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 1.5rem;
      letter-spacing: 1px;
      color: white;
      text-transform: uppercase;
    }

    .logo-icon {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, var(--orange-flame), #ff8c6b);
      border-radius: 50%;
      position: relative;
    }

    .logo-icon::after {
      content: "";
      position: absolute;
      width: 12px;
      height: 12px;
      background: var(--deep-space);
      border-radius: 50%;
      top: 4px;
      right: 4px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
    }

    .nav-links a {
      font-weight: 500;
      font-size: 0.95rem;
      color: var(--text-muted);
      transition: color 0.2s;
      position: relative;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: white;
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -6px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--orange-flame);
      transition: width 0.3s;
    }

    .nav-links a:hover::after {
      width: 100%;
    }

    .btn-nav {
      background: var(--orange-flame);
      color: white !important;
      padding: 10px 24px;
      border-radius: var(--radius-pill);
      font-weight: 600;
      box-shadow: 0 4px 12px rgba(255,77,46,0.4);
      transition: var(--transition);
    }

    .btn-nav:hover {
      background: var(--orange-deep);
      box-shadow: 0 8px 20px rgba(255,77,46,0.6);
    }

    .hamburger {
      display: none;
      flex-direction: column;
      cursor: pointer;
      gap: 5px;
    }

    .hamburger span {
      width: 25px;
      height: 3px;
      background: white;
      transition: var(--transition);
      border-radius: 3px;
    }

    /* 移动端导航 */
    .mobile-menu {
      display: none;
      position: fixed;
      top: 72px;
      left: 0;
      width: 100%;
      height: calc(100vh - 72px);
      background: rgba(11, 14, 20, 0.98);
      backdrop-filter: blur(25px);
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 36px;
      z-index: 999;
    }

    .mobile-menu a {
      font-size: 1.5rem;
      font-weight: 600;
      color: white;
    }

    /* Hero */
    .hero {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
    }

    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at center, transparent 20%, var(--deep-space) 100%);
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 900px;
      padding: 0 20px;
    }

    .hero h1 {
      font-size: clamp(2.5rem, 8vw, 4rem);
      font-weight: 800;
      background: linear-gradient(to right, #ffffff, var(--orange-flame));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 20px;
    }

    .hero-sub {
      font-size: 1.3rem;
      color: var(--text-muted);
      margin-bottom: 40px;
    }

    .cta-group {
      display: flex;
      gap: 20px;
      justify-content: center;
      flex-wrap: wrap;
      margin-bottom: 24px;
    }

    .btn-primary {
      background: var(--orange-flame);
      color: white;
      padding: 16px 40px;
      border-radius: var(--radius-pill);
      font-weight: 700;
      border: none;
      cursor: pointer;
      transition: var(--transition);
      box-shadow: 0 6px 20px rgba(255,77,46,0.5);
      font-size: 1rem;
    }

    .btn-primary:hover {
      background: var(--orange-deep);
      box-shadow: 0 10px 28px rgba(255,77,46,0.7);
      transform: translateY(-2px);
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--orange-flame);
      color: white;
      padding: 16px 40px;
      border-radius: var(--radius-pill);
      font-weight: 700;
      cursor: pointer;
      transition: var(--transition);
    }

    .btn-outline:hover {
      background: var(--orange-flame);
    }

    .micro-text {
      color: #9ca3af;
      font-size: 0.9rem;
    }

    .scroll-indicator {
      position: absolute;
      bottom: 30px;
      left: 50%;
      transform: translateX(-50%);
      animation: bounce 2s infinite;
      color: var(--orange-flame);
      font-size: 2rem;
    }

    @keyframes bounce {
      0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
      40% { transform: translateX(-50%) translateY(-12px); }
      60% { transform: translateX(-50%) translateY(-6px); }
    }

    /* 板块通用 */
    section {
      padding: 100px 0;
    }

    .section-title {
      font-size: 2.4rem;
      font-weight: 700;
      margin-bottom: 15px;
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .title-decor {
      width: 6px;
      height: 32px;
      background: var(--orange-flame);
      border-radius: 3px;
    }

    .section-sub {
      color: var(--text-muted);
      margin-bottom: 50px;
      font-size: 1.1rem;
    }

    /* 数据看板 */
    .dashboard-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin-top: 40px;
    }

    .stat-card {
      background: var(--space-gray);
      padding: 32px 20px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-subtle);
      text-align: center;
      transition: var(--transition);
    }

    .stat-card:hover {
      border-color: var(--orange-flame);
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }

    .stat-number {
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--victory-gold);
      margin-bottom: 8px;
    }

    /* 服务矩阵 非对称 */
    .services-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
    }

    .service-main {
      background: var(--space-gray);
      border-radius: var(--radius-lg);
      overflow: hidden;
      border-left: 5px solid var(--orange-flame);
      display: flex;
      flex-direction: column;
    }

    .service-main img {
      height: 240px;
      object-fit: cover;
    }

    .service-body {
      padding: 28px;
    }

    .service-side {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }

    .service-card {
      background: var(--space-gray);
      border-radius: var(--radius-lg);
      padding: 24px;
      border: 1px solid var(--border-subtle);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .service-card:hover {
      border-color: var(--orange-flame);
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }

    /* 对比 */
    .comparison-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      margin-top: 30px;
    }

    .compare-box {
      background: var(--space-gray);
      padding: 32px;
      border-radius: var(--radius-lg);
    }

    .compare-box.right {
      border: 1px solid var(--track-green);
      box-shadow: 0 0 20px rgba(0,200,151,0.2);
    }

    .bar {
      height: 12px;
      background: #2d3748;
      border-radius: 20px;
      margin: 15px 0;
      overflow: hidden;
    }

    .fill {
      height: 100%;
      background: linear-gradient(90deg, var(--orange-flame), var(--track-green));
      width: 0%;
    }

    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }

    .faq-item {
      border-bottom: 1px solid rgba(255,255,255,0.1);
      padding: 20px 0;
      cursor: pointer;
    }

    .faq-question {
      display: flex;
      justify-content: space-between;
      font-weight: 700;
      font-size: 1.1rem;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      color: var(--text-muted);
      margin-top: 0;
    }

    .faq-item.active .faq-answer {
      max-height: 200px;
      margin-top: 15px;
    }

    /* 表单 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
    }

    .form-group input, .form-group textarea {
      width: 100%;
      background: var(--space-gray);
      border: 1px solid rgba(255,255,255,0.1);
      padding: 14px;
      border-radius: var(--radius-md);
      color: white;
      margin-bottom: 16px;
    }

    .form-group input:focus {
      border-color: var(--orange-flame);
      outline: none;
      box-shadow: 0 0 10px rgba(255,77,46,0.3);
    }

    .info-badge {
      background: var(--space-gray);
      padding: 28px;
      border-radius: var(--radius-lg);
    }

    footer {
      background: #080A0F;
      padding: 50px 0 20px;
      color: #6B7280;
    }

    @media (max-width: 1024px) {
      .dashboard-grid { grid-template-columns: repeat(2,1fr); }
      .services-grid { grid-template-columns: 1fr; }
      .comparison-row { grid-template-columns: 1fr; }
    }

    @media (max-width: 768px) {
      .container { padding: 0 20px; }
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .contact-grid { grid-template-columns: 1fr; }
      .hero h1 { font-size: 2.4rem; }
    }