/* roulang page: index */
/* 设计变量 */
    :root {
      --primary: #E8452D;
      --primary-dark: #C13020;
      --secondary: #1A1A2E;
      --accent: #F5A623;
      --bg-deep: #0F0F1A;
      --bg-card: rgba(26, 26, 46, 0.8);
      --text-white: #FFFFFF;
      --text-light: #B0B0C0;
      --text-muted: #8888A0;
      --border-subtle: rgba(232, 69, 45, 0.15);
      --border-active: rgba(232, 69, 45, 0.45);
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5);
      --shadow-hover: 0 12px 40px rgba(232, 69, 45, 0.2);
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --transition: 0.25s ease;
      --container-max: 1280px;
      --font-family: system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    }
    
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-family);
      background-color: var(--bg-deep);
      color: var(--text-light);
      line-height: 1.6;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }
    
    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
      width: 100%;
    }
    
    /* 排版 */
    h1, h2, h3, h4 {
      color: var(--text-white);
      font-weight: 700;
      letter-spacing: -0.3px;
    }
    
    h1 {
      font-size: 3rem;
      line-height: 1.2;
      letter-spacing: -0.5px;
    }
    
    h2 {
      font-size: 2rem;
      margin-bottom: 1rem;
    }
    
    h3 {
      font-size: 1.25rem;
      font-weight: 600;
    }
    
    p {
      color: var(--text-light);
      margin-bottom: 1rem;
    }
    
    a {
      text-decoration: none;
      color: var(--text-white);
      transition: color var(--transition);
    }
    
    a:hover {
      color: var(--primary);
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    /* 按钮系统 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 1rem;
      transition: all var(--transition);
      cursor: pointer;
      border: none;
      white-space: nowrap;
    }
    
    .btn-primary {
      background: var(--primary);
      color: white;
      border: 2px solid var(--primary);
    }
    
    .btn-primary:hover {
      background: #FF5A45;
      border-color: #FF5A45;
      transform: scale(1.03);
      box-shadow: 0 10px 25px rgba(232,69,45,0.5);
      color: white;
    }
    
    .btn-outline {
      background: transparent;
      color: var(--primary);
      border: 2px solid var(--primary);
    }
    
    .btn-outline:hover {
      background: var(--primary);
      color: white;
      transform: translateY(-2px);
    }
    
    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(15, 15, 26, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(232, 69, 45, 0.2);
      padding: 16px 0;
      transition: background var(--transition);
    }
    
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }
    
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--text-white);
    }
    
    .logo i {
      color: var(--primary);
      font-size: 2rem;
    }
    
    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    
    .nav-links a {
      font-weight: 500;
      color: var(--text-light);
      padding: 6px 0;
      border-bottom: 2px solid transparent;
      transition: all var(--transition);
    }
    
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--text-white);
      border-bottom-color: var(--primary);
    }
    
    .nav-cta {
      background: var(--primary);
      padding: 10px 24px !important;
      border-radius: 30px !important;
      color: white !important;
      font-weight: 600 !important;
      border: none !important;
    }
    
    .nav-cta:hover {
      background: #FF5A45 !important;
    }
    
    .hamburger {
      display: none;
      background: none;
      border: none;
      color: white;
      font-size: 1.8rem;
      cursor: pointer;
    }
    
    /* 移动端导航抽屉 */
    .mobile-menu {
      position: fixed;
      top: 0;
      right: -100%;
      width: 80%;
      max-width: 320px;
      height: 100vh;
      background: var(--secondary);
      backdrop-filter: blur(20px);
      padding: 24px;
      display: flex;
      flex-direction: column;
      gap: 28px;
      z-index: 1001;
      transition: right 0.3s ease;
      box-shadow: -10px 0 30px rgba(0,0,0,0.7);
    }
    
    .mobile-menu.open {
      right: 0;
    }
    
    .mobile-menu a {
      font-size: 1.2rem;
      font-weight: 500;
      padding: 12px 0;
      border-bottom: 1px solid rgba(255,255,255,0.1);
      color: var(--text-light);
    }
    
    .mobile-close {
      align-self: flex-end;
      background: none;
      border: none;
      color: white;
      font-size: 2rem;
    }
    
    /* Hero */
    .hero {
      padding: 160px 0 100px;
      background: radial-gradient(circle at 30% 40%, rgba(232,69,45,0.25) 0%, #1A1A2E 70%, #0F0F1A 100%);
      position: relative;
      overflow: hidden;
    }
    
    .hero::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.25;
      z-index: 0;
    }
    
    .hero-content {
      display: flex;
      align-items: center;
      gap: 50px;
      position: relative;
      z-index: 2;
    }
    
    .hero-text {
      flex: 1;
    }
    
    .hero-text h1 {
      margin-bottom: 1.5rem;
      background: linear-gradient(to right, #fff, #F5A623);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    
    .hero-sub {
      font-size: 1.2rem;
      color: var(--text-light);
      margin-bottom: 2rem;
      max-width: 500px;
    }
    
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    
    .hero-visual {
      flex: 0.9;
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    
    .badge-float {
      background: rgba(26,26,46,0.9);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(245,166,35,0.3);
      border-radius: 40px;
      padding: 12px 24px;
      display: flex;
      align-items: center;
      gap: 12px;
      font-weight: 600;
      color: var(--text-white);
      animation: float 3s infinite alternate ease-in-out;
      box-shadow: var(--shadow-card);
    }
    
    .badge-float i {
      color: var(--accent);
      font-size: 1.4rem;
    }
    
    @keyframes float {
      0% { transform: translateY(0); }
      100% { transform: translateY(-6px); }
    }
    
    .scroll-indicator {
      text-align: center;
      margin-top: 60px;
      color: var(--text-muted);
      animation: bounce 1.5s infinite;
    }
    
    @keyframes bounce {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(8px); }
    }
    
    /* 通用板块 */
    .section {
      padding: 110px 0;
    }
    
    .section-header {
      text-align: center;
      margin-bottom: 50px;
    }
    
    .section-header h2 {
      color: var(--text-white);
    }
    
    /* 数据看板 */
    .dashboard-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    
    .stat-card {
      background: var(--bg-card);
      backdrop-filter: blur(10px);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg);
      padding: 28px 20px;
      text-align: center;
      transition: all var(--transition);
      box-shadow: var(--shadow-card);
    }
    
    .stat-card:hover {
      border-color: var(--border-active);
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }
    
    .stat-number {
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--accent);
      line-height: 1.2;
    }
    
    .stat-label {
      color: var(--text-light);
      margin-top: 8px;
    }
    
    /* 服务矩阵 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    
    .service-card {
      background: var(--bg-card);
      backdrop-filter: blur(10px);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      transition: all var(--transition);
      position: relative;
      overflow: hidden;
    }
    
    .service-card::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 4px;
      background: linear-gradient(90deg, var(--primary), var(--accent));
      transform: scaleX(0);
      transition: transform var(--transition);
    }
    
    .service-card:hover::after {
      transform: scaleX(1);
    }
    
    .service-card:hover {
      border-color: var(--border-active);
      transform: translateY(-6px);
    }
    
    .service-icon {
      font-size: 2.2rem;
      color: var(--primary);
      margin-bottom: 18px;
    }
    
    /* 对比条 */
    .comparison-bar {
      display: flex;
      flex-direction: column;
      gap: 28px;
    }
    
    .comp-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
    }
    
    .comp-label {
      width: 140px;
      font-weight: 600;
      color: var(--text-white);
    }
    
    .comp-bars {
      flex: 1;
      display: flex;
      gap: 12px;
      align-items: center;
    }
    
    .bar-huobo {
      background: var(--primary);
      height: 12px;
      border-radius: 20px;
      width: 80%;
    }
    
    .bar-avg {
      background: #555;
      height: 12px;
      border-radius: 20px;
      width: 45%;
    }
    
    /* 流程 */
    .process-steps {
      display: flex;
      justify-content: space-between;
      text-align: center;
      gap: 30px;
    }
    
    .step {
      flex: 1;
      background: var(--bg-card);
      padding: 30px 20px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-subtle);
    }
    
    .step-number {
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--primary);
    }
    
    /* FAQ */
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      overflow: hidden;
    }
    
    .faq-question {
      padding: 22px 28px;
      font-weight: 700;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
      color: var(--text-white);
    }
    
    .faq-answer {
      padding: 0 28px 22px;
      color: var(--text-light);
      display: none;
    }
    
    .faq-item.active {
      border-color: var(--primary);
    }
    
    .faq-item.active .faq-answer {
      display: block;
    }
    
    /* CTA 横幅 */
    .cta-band {
      background: linear-gradient(135deg, #1A1A2E 0%, #0F0F1A 100%);
      border: 1px solid rgba(232,69,45,0.3);
      border-radius: var(--radius-lg);
      padding: 70px 40px;
      text-align: center;
    }
    
    /* 页脚 */
    .footer {
      background: #0A0A14;
      padding: 60px 0 30px;
    }
    
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
      margin-bottom: 40px;
    }
    
    .footer-col h4 {
      margin-bottom: 18px;
    }
    
    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.1);
      padding-top: 25px;
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      color: var(--text-muted);
    }
    
    /* 响应式 */
    @media (max-width: 1024px) {
      .services-grid { grid-template-columns: repeat(2, 1fr); }
      .dashboard-grid { grid-template-columns: repeat(2, 1fr); }
    }
    
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: block; }
      .hero-content { flex-direction: column; }
      h1 { font-size: 2.2rem; }
      .services-grid { grid-template-columns: 1fr; }
      .process-steps { flex-direction: column; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .comp-bars { flex-direction: column; align-items: flex-start; }
    }
    
    @media (max-width: 520px) {
      .dashboard-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .hero-buttons .btn { width: 100%; }
    }