/* roulang page: index */
:root {
      --primary: #E63946;
      --primary-dark: #C1121F;
      --secondary: #1A1A2E;
      --accent: #F4A261;
      --bg-deep: #0B0B1A;
      --bg-card: rgba(26, 26, 46, 0.8);
      --text-white: #FFFFFF;
      --text-body: #B0B8D1;
      --text-muted: #6C7293;
      --border-glow: rgba(244, 162, 97, 0.2);
      --shadow-red: 0 4px 24px rgba(230, 57, 70, 0.15);
      --shadow-hover: 0 8px 32px rgba(230, 57, 70, 0.25);
      --radius-lg: 12px;
      --radius-md: 8px;
      --font-zh: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --font-en: "Inter", "Rajdhani", sans-serif;
      --transition: 0.25s ease;
      --container: 1280px;
      --header-height: 72px;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      font-family: var(--font-zh);
      background-color: var(--bg-deep);
      color: var(--text-body);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    h1, h2, h3, h4 {
      font-weight: 600;
      color: var(--text-white);
      font-family: var(--font-zh);
    }
    h1 {
      font-size: 48px;
      line-height: 1.2;
      letter-spacing: -0.5px;
      font-weight: 700;
    }
    h2 {
      font-size: 36px;
      line-height: 1.25;
      margin-bottom: 1rem;
    }
    h3 {
      font-size: 22px;
      line-height: 1.35;
      margin-bottom: 0.5rem;
    }
    h4 {
      font-size: 18px;
      font-weight: 600;
    }
    p {
      margin-bottom: 1.2rem;
      font-size: 16px;
      line-height: 1.75;
      color: var(--text-body);
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, .btn {
      cursor: pointer;
      font-family: var(--font-zh);
      border: none;
      background: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 600;
      transition: all var(--transition);
    }
    .container {
      max-width: var(--container);
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航栏 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: var(--header-height);
      background: rgba(11, 11, 26, 0.92);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      z-index: 1000;
      border-bottom: 1px solid transparent;
      background-image: linear-gradient(90deg, var(--primary) 0%, transparent 100%);
      background-position: bottom;
      background-size: 100% 1px;
      background-repeat: no-repeat;
    }
    .nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 100%;
    }
    .logo {
      font-family: var(--font-en);
      font-weight: 700;
      font-size: 24px;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 6px;
      letter-spacing: 1px;
    }
    .logo i {
      font-size: 26px;
      color: var(--accent);
    }
    .nav-links {
      display: flex;
      gap: 32px;
    }
    .nav-links a {
      color: var(--text-white);
      font-weight: 500;
      font-size: 16px;
      position: relative;
      padding: 4px 0;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: width 0.3s ease;
    }
    .nav-links a:hover {
      color: var(--primary);
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .btn-primary {
      background: var(--primary);
      color: white;
      padding: 12px 28px;
      border-radius: var(--radius-md);
      font-weight: 600;
      font-size: 15px;
      box-shadow: 0 4px 12px rgba(230,57,70,0.3);
    }
    .btn-primary:hover {
      background: var(--primary-dark);
      box-shadow: inset 0 0 12px rgba(244,162,97,0.4), 0 6px 16px rgba(230,57,70,0.4);
    }
    .btn-outline {
      border: 1.5px solid var(--primary);
      color: var(--primary);
      padding: 12px 28px;
      border-radius: var(--radius-md);
      font-weight: 600;
      background: transparent;
    }
    .btn-outline:hover {
      background: var(--primary);
      color: white;
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
    }
    .hamburger span {
      width: 26px;
      height: 2.5px;
      background: var(--text-white);
      transition: 0.3s;
    }
    /* Hero */
    .hero {
      padding: calc(var(--header-height) + 80px) 0 100px;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      color: white;
    }
    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(11,11,26,0.85) 0%, rgba(11,11,26,0.4) 70%);
      z-index: 1;
    }
    .hero .container {
      position: relative;
      z-index: 2;
      display: flex;
      align-items: center;
      gap: 40px;
      flex-wrap: wrap;
    }
    .hero-content {
      flex: 1 1 500px;
    }
    .hero-content h1 {
      color: white;
      margin-bottom: 1rem;
    }
    .hero-content .subtitle {
      font-size: 18px;
      color: var(--text-body);
      margin-bottom: 2rem;
      max-width: 500px;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .hero-image {
      flex: 1 1 400px;
      display: flex;
      justify-content: center;
    }
    .hero-image img {
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-red);
      max-height: 380px;
      object-fit: cover;
    }
    /* 板块通用 */
    section {
      padding: 80px 0;
    }
    .section-title {
      text-align: center;
      margin-bottom: 48px;
    }
    .section-title h2 {
      color: white;
    }
    .section-title p {
      color: var(--text-muted);
      max-width: 600px;
      margin: 0 auto;
    }
    /* 卡片网格 */
    .grid-3, .grid-4 {
      display: grid;
      gap: 24px;
    }
    .grid-3 {
      grid-template-columns: repeat(3, 1fr);
    }
    .grid-4 {
      grid-template-columns: repeat(4, 1fr);
    }
    .card {
      background: var(--bg-card);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      border: 1px solid var(--border-glow);
      box-shadow: var(--shadow-red);
      transition: all var(--transition);
    }
    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: var(--accent);
    }
    .icon-box {
      font-size: 36px;
      color: var(--primary);
      margin-bottom: 16px;
    }
    /* 场景卡片 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .scenario-card {
      background: var(--bg-card);
      backdrop-filter: blur(12px);
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-glow);
      display: flex;
      flex-direction: column;
    }
    .scenario-card img {
      width: 100%;
      height: 220px;
      object-fit: cover;
    }
    .scenario-content {
      padding: 24px;
    }
    .tag {
      display: inline-block;
      background: rgba(230,57,70,0.2);
      color: var(--primary);
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      margin-right: 6px;
      margin-bottom: 8px;
    }
    /* 案例数据 */
    .stats {
      display: flex;
      justify-content: center;
      gap: 60px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .stat-item {
      text-align: center;
    }
    .stat-number {
      font-family: var(--font-en);
      font-size: 56px;
      font-weight: 700;
      color: var(--primary);
      line-height: 1.1;
    }
    .logo-wall {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 32px;
      opacity: 0.7;
      margin: 32px 0;
    }
    .testimonial-card {
      background: var(--bg-card);
      border-left: 4px solid var(--primary);
      padding: 24px;
      border-radius: 0 var(--radius-md) var(--radius-md) 0;
    }
    /* 价格卡片 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .pricing-card {
      background: var(--bg-card);
      backdrop-filter: blur(12px);
      border-radius: var(--radius-lg);
      padding: 32px;
      border: 1px solid var(--border-glow);
      text-align: center;
      transition: 0.2s;
    }
    .pricing-card.featured {
      border: 2px solid var(--primary);
      transform: scale(1.03);
      position: relative;
    }
    .badge {
      background: var(--accent);
      color: #0B0B1A;
      padding: 6px 16px;
      border-radius: 20px;
      font-weight: 700;
      font-size: 14px;
      display: inline-block;
      margin-bottom: 16px;
    }
    .price {
      font-family: var(--font-en);
      font-size: 48px;
      color: var(--primary);
      font-weight: 700;
    }
    /* FAQ */
    .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;
      align-items: center;
      color: white;
      font-weight: 600;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      color: var(--text-body);
    }
    /* CTA */
    .cta-section {
      background: linear-gradient(135deg, #1A1A2E 0%, #0B0B1A 100%);
      text-align: center;
      border-top: 1px solid var(--primary);
    }
    .footer {
      background: #0B0B1A;
      padding: 60px 0 30px;
      color: var(--text-muted);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
    }
    @media (max-width: 1024px) {
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .pricing-grid { grid-template-columns: 1fr 1fr; }
      .scenario-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 768px) {
      h1 { font-size: 36px; }
      h2 { font-size: 28px; }
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .hero .container { flex-direction: column; }
      .grid-3, .pricing-grid, .footer-grid { grid-template-columns: 1fr; }
      .stats { gap: 30px; }
    }