/* roulang page: index */
:root {
      --gold-dark: #A67C00;
      --gold-light: #C89B3C;
      --gold-gradient: linear-gradient(135deg, #C89B3C 0%, #A67C00 100%);
      --midnight: #1A2332;
      --warm-white: #F9F7F2;
      --pure-white: #FFFFFF;
      --amber: #E67E22;
      --text-primary: #2C3E50;
      --text-secondary: #5A6C7D;
      --text-light: #B0B8C1;
      --border-light: #E8E4D9;
      --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.04);
      --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.08);
      --radius-lg: 20px;
      --radius-btn: 50px;
      --radius-sm: 12px;
      --transition: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1.2);
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      --container-max: 1280px;
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--warm-white);
      color: var(--text-primary);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航栏 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      box-shadow: 0 1px 0 var(--border-light);
      z-index: 1000;
      transition: var(--transition);
    }

    .nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .logo {
      font-size: 1.8rem;
      font-weight: 700;
      background: var(--gold-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: 1px;
      text-decoration: none;
    }

    .nav-links {
      display: flex;
      gap: 2rem;
      list-style: none;
    }

    .nav-links a {
      text-decoration: none;
      color: var(--text-primary);
      font-weight: 500;
      font-size: 1rem;
      position: relative;
      padding: 0.25rem 0;
      transition: color 0.2s;
    }

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

    .nav-links a:hover {
      color: var(--gold-dark);
    }

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

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 6px;
      cursor: pointer;
      background: none;
      border: none;
    }

    .hamburger span {
      width: 28px;
      height: 2px;
      background: var(--midnight);
      transition: var(--transition);
      border-radius: 4px;
    }

    /* 移动端菜单 */
    .mobile-menu {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      background: rgba(26, 35, 50, 0.97);
      backdrop-filter: blur(15px);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 2.5rem;
      transform: translateX(100%);
      transition: transform 0.4s ease;
      z-index: 999;
    }

    .mobile-menu.active {
      transform: translateX(0);
    }

    .mobile-menu a {
      color: white;
      font-size: 1.8rem;
      font-weight: 500;
      text-decoration: none;
      letter-spacing: 2px;
    }

    .mobile-menu .close-btn {
      position: absolute;
      top: 24px;
      right: 24px;
      font-size: 2rem;
      color: white;
      background: none;
      border: none;
      cursor: pointer;
    }

    /* Hero */
    .hero {
      padding: 140px 0 100px;
      display: flex;
      align-items: center;
      background: radial-gradient(circle at 30% 50%, rgba(249, 247, 242, 1) 0%, rgba(245, 240, 225, 0.8) 100%);
    }

    .hero-content {
      flex: 1;
    }

    .hero h1 {
      font-size: clamp(2.5rem, 6vw, 4rem);
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 1.5rem;
      color: var(--midnight);
    }

    .hero h1 span {
      background: var(--gold-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .hero p {
      font-size: 1.25rem;
      color: var(--text-secondary);
      max-width: 550px;
      margin-bottom: 2.5rem;
    }

    .hero-buttons {
      display: flex;
      gap: 1.25rem;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: var(--gold-gradient);
      color: white;
      border: none;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 1rem;
      cursor: pointer;
      transition: all 0.3s;
      box-shadow: 0 4px 12px rgba(200, 155, 60, 0.3);
      text-decoration: none;
      display: inline-block;
    }

    .btn-primary:hover {
      filter: brightness(1.1);
      box-shadow: 0 8px 20px rgba(200, 155, 60, 0.5);
      transform: translateY(-2px);
    }

    .btn-outline {
      border: 2px solid var(--gold-light);
      color: var(--gold-dark);
      background: transparent;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 1rem;
      cursor: pointer;
      transition: all 0.3s;
      text-decoration: none;
      display: inline-block;
    }

    .btn-outline:hover {
      background: var(--gold-gradient);
      color: white;
      border-color: transparent;
    }

    .hero-image {
      flex: 1;
      text-align: right;
    }

    .hero-image img {
      max-width: 100%;
      height: auto;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-hover);
    }

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

    .section-title {
      font-size: 2.5rem;
      font-weight: 700;
      text-align: center;
      margin-bottom: 1rem;
      color: var(--midnight);
    }

    .section-subtitle {
      text-align: center;
      color: var(--text-secondary);
      font-size: 1.2rem;
      margin-bottom: 3.5rem;
    }

    /* 核心优势卡片 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }

    .feature-card {
      background: var(--pure-white);
      padding: 2.5rem 2rem;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      text-align: center;
      position: relative;
    }

    .feature-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-hover);
    }

    .feature-icon {
      font-size: 2.5rem;
      margin-bottom: 1.5rem;
    }

    .badge {
      background: var(--amber);
      color: white;
      padding: 0.25rem 1rem;
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 600;
      display: inline-block;
      margin-top: 1rem;
    }

    /* 产品服务 - 左右交替 */
    .service-row {
      display: flex;
      align-items: center;
      gap: 3rem;
      margin-bottom: 4rem;
    }

    .service-row.reverse {
      flex-direction: row-reverse;
    }

    .service-text {
      flex: 1;
    }

    .service-text h3 {
      font-size: 2rem;
      margin-bottom: 1rem;
    }

    .service-list {
      list-style: none;
      margin: 1.5rem 0;
    }

    .service-list li {
      margin-bottom: 0.8rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
      color: var(--text-secondary);
    }

    .service-list li::before {
      content: "✓";
      color: var(--gold-light);
      font-weight: bold;
      font-size: 1.2rem;
    }

    .service-image img {
      width: 100%;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
    }

    /* 场景卡片 */
    .scenarios-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }

    .scenario-card {
      background: linear-gradient(135deg, #FEF9F0, #F9F2E1);
      border-radius: var(--radius-lg);
      padding: 2.5rem 2rem;
      transition: var(--transition);
    }

    .scenario-card:hover {
      transform: scale(1.02);
    }

    /* 案例 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 2rem;
    }

    .case-card {
      background: var(--pure-white);
      border-left: 6px solid var(--gold-light);
      padding: 2rem;
      border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
      box-shadow: var(--shadow-card);
    }

    /* 价格 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }

    .pricing-card {
      background: white;
      padding: 2.5rem;
      border-radius: var(--radius-lg);
      text-align: center;
      box-shadow: var(--shadow-card);
      position: relative;
    }

    .pricing-card.featured {
      background: var(--gold-gradient);
      color: white;
      transform: scale(1.03);
    }

    .pricing-card.featured .price {
      color: white;
    }

    .price {
      font-size: 2.8rem;
      font-weight: 700;
      margin: 1rem 0;
    }

    /* FAQ */
    .faq-item {
      background: white;
      border-radius: var(--radius-sm);
      margin-bottom: 1rem;
      box-shadow: 0 2px 10px rgba(0,0,0,0.02);
    }

    .faq-question {
      padding: 1.5rem 2rem;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
      font-size: 1.1rem;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      background: #FAFAF8;
      padding: 0 2rem;
    }

    .faq-answer.open {
      max-height: 200px;
      padding: 1.5rem 2rem;
    }

    /* CTA 横幅 */
    .cta-banner {
      background: var(--gold-gradient);
      text-align: center;
      padding: 80px 0;
      color: white;
      border-radius: 0;
    }

    /* 页脚 */
    .footer {
      background: var(--midnight);
      color: var(--text-light);
      padding: 60px 0 20px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 2rem;
    }

    @media (max-width: 1024px) {
      .features-grid, .scenarios-grid, .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .cases-grid {
        grid-template-columns: 1fr;
      }
      .service-row {
        flex-direction: column;
      }
      .service-row.reverse {
        flex-direction: column;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .hamburger {
        display: flex;
      }
      .hero {
        flex-direction: column;
        text-align: center;
      }
      .hero-image {
        margin-top: 2rem;
        text-align: center;
      }
      .features-grid, .scenarios-grid, .pricing-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      section {
        padding: 70px 0;
      }
    }