/* roulang page: index */
:root {
      --primary: #E63946;
      --primary-dark: #c62d39;
      --secondary: #1D1D1F;
      --soft-bg: #F1FAEE;
      --accent-gold: #E9C46A;
      --accent-gold-light: #f5e1a0;
      --text-main: #1D1D1F;
      --text-soft: #6B7280;
      --white: #FFFFFF;
      --border-light: #E5E7EB;
      --shadow-xs: 0 4px 12px rgba(0,0,0,0.04);
      --shadow-md: 0 12px 28px rgba(0,0,0,0.08);
      --shadow-lg: 0 20px 40px rgba(0,0,0,0.12);
      --radius-card: 16px;
      --radius-btn: 50px;
      --transition: 0.25s ease;
      --font-sans: 'Noto Sans SC', 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
      --max-width: 1280px;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--white);
      color: var(--text-main);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

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

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      transition: 0.3s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border: none;
      outline: none;
      font-weight: 600;
      min-height: 44px;
    }

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

    /* 导航 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      height: 72px;
      background: transparent;
      backdrop-filter: blur(0px);
      transition: background 0.3s, backdrop-filter 0.3s, box-shadow 0.3s;
    }

    .header.scrolled {
      background: rgba(29, 29, 31, 0.92);
      backdrop-filter: blur(16px);
      box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    }

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

    .logo {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .header.scrolled .logo {
      color: var(--white);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }

    .nav-links a {
      font-weight: 500;
      color: var(--white);
      opacity: 0.9;
      position: relative;
      font-size: 0.95rem;
    }
    .header.scrolled .nav-links a {
      color: rgba(255,255,255,0.85);
    }
    .nav-links a:hover {
      opacity: 1;
      color: var(--accent-gold);
    }

    .btn-nav {
      background: var(--accent-gold);
      color: var(--secondary) !important;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      opacity: 1 !important;
    }
    .btn-nav:hover {
      background: var(--accent-gold-light);
      box-shadow: 0 8px 18px rgba(233, 196, 106, 0.4);
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
    }
    .hamburger span {
      width: 26px;
      height: 3px;
      background: var(--white);
      border-radius: 2px;
      transition: 0.3s;
    }
    .header.scrolled .hamburger span {
      background: var(--white);
    }

    .mobile-menu {
      display: none;
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      background: linear-gradient(135deg, rgba(29,29,31,0.88) 0%, rgba(29,29,31,0.7) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      display: flex;
      align-items: center;
      color: var(--white);
      position: relative;
      overflow: hidden;
    }

    .hero-content {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
      width: 100%;
    }

    .hero-text h1 {
      font-size: 3.5rem;
      font-weight: 900;
      line-height: 1.15;
      margin-bottom: 24px;
      letter-spacing: -1px;
    }
    .hero-text h1 span {
      color: var(--accent-gold);
    }

    .hero-sub {
      font-size: 1.25rem;
      opacity: 0.9;
      margin-bottom: 36px;
      max-width: 500px;
    }

    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: var(--accent-gold);
      color: var(--secondary);
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 700;
    }
    .btn-primary:hover {
      background: var(--accent-gold-light);
      box-shadow: 0 12px 28px rgba(233,196,106,0.5);
      transform: translateY(-2px);
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--white);
      color: var(--white);
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 600;
    }
    .btn-outline:hover {
      background: rgba(255,255,255,0.1);
      border-color: var(--accent-gold);
      color: var(--accent-gold);
    }

    .hero-visual {
      display: flex;
      justify-content: center;
      align-items: center;
    }
    .dashboard-mock {
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(12px);
      border-radius: 24px;
      padding: 20px;
      box-shadow: var(--shadow-lg);
      border: 1px solid rgba(255,255,255,0.15);
    }
    .dashboard-mock img {
      border-radius: 16px;
      width: 100%;
    }

    /* 板块通用 */
    .section {
      padding: 100px 0;
    }
    .section-alt {
      background-color: var(--soft-bg);
    }
    .section-title {
      font-size: 2.5rem;
      font-weight: 700;
      margin-bottom: 16px;
      line-height: 1.2;
    }
    .section-sub {
      color: var(--text-soft);
      font-size: 1.1rem;
      margin-bottom: 60px;
    }

    /* 功能区块 非对称列表 */
    .features-list {
      display: flex;
      flex-direction: column;
      gap: 0;
      max-width: 900px;
    }
    .feature-item {
      display: flex;
      gap: 32px;
      padding: 32px 0;
      border-bottom: 1px solid var(--border-light);
      align-items: flex-start;
    }
    .feature-icon {
      width: 64px;
      height: 64px;
      background: var(--primary);
      border-radius: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      color: white;
      font-size: 2rem;
    }
    .feature-text h3 {
      font-size: 1.6rem;
      font-weight: 600;
      margin-bottom: 8px;
    }
    .feature-text p {
      color: var(--text-soft);
    }

    /* 场景横向滚动 */
    .scenarios-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 20px;
      scroll-snap-type: x mandatory;
    }
    .scenario-card {
      flex: 0 0 300px;
      scroll-snap-align: start;
      background: var(--white);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-xs);
      border: 1px solid rgba(230, 57, 70, 0.15);
      transition: var(--transition);
    }
    .scenario-card:hover {
      border-color: var(--accent-gold);
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .scenario-card img {
      height: 180px;
      object-fit: cover;
    }
    .scenario-info {
      padding: 20px;
    }
    .scenario-info h3 {
      font-weight: 700;
      margin-bottom: 6px;
    }

    /* 案例数字陈列 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 32px;
    }
    .case-item {
      display: flex;
      gap: 28px;
      align-items: center;
      background: var(--white);
      padding: 32px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-xs);
    }
    .case-num {
      font-size: 3.8rem;
      font-weight: 900;
      color: var(--accent-gold);
      line-height: 1;
      font-feature-settings: "tnum";
    }

    /* 价格卡片 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 24px;
    }
    .pricing-card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 40px 28px;
      box-shadow: var(--shadow-xs);
      border: 2px solid transparent;
      transition: var(--transition);
      text-align: center;
    }
    .pricing-card.featured {
      border-color: var(--primary);
      position: relative;
    }
    .badge-gold {
      background: var(--accent-gold);
      color: var(--secondary);
      padding: 6px 20px;
      border-radius: 20px;
      font-weight: 700;
      font-size: 0.8rem;
      position: absolute;
      top: -14px;
      left: 50%;
      transform: translateX(-50%);
    }
    .price {
      font-size: 3rem;
      font-weight: 800;
      color: var(--accent-gold);
      margin: 20px 0;
      font-feature-settings: "tnum";
    }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      padding: 24px 0;
    }
    .faq-question {
      font-weight: 700;
      font-size: 1.1rem;
      display: flex;
      align-items: center;
      gap: 12px;
      cursor: pointer;
    }
    .faq-q {
      color: var(--primary);
      font-weight: 900;
    }
    .faq-answer {
      margin-top: 12px;
      color: var(--text-soft);
      padding-left: 32px;
    }

    /* 联系/CTA */
    .cta-band {
      background: var(--secondary);
      color: white;
      text-align: center;
      padding: 80px 24px;
      border-radius: 0;
    }
    .footer {
      background: var(--secondary);
      color: rgba(255,255,255,0.7);
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }
    .footer a {
      color: rgba(255,255,255,0.7);
    }
    .footer a:hover {
      color: var(--accent-gold);
    }

    @media (max-width: 1024px) {
      .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
      }
      .hero-text h1 {
        font-size: 2.6rem;
      }
      .cases-grid {
        grid-template-columns: 1fr;
      }
      .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
      }
      .features-list {
        max-width: 100%;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .hamburger {
        display: flex;
      }
      .mobile-menu {
        display: none;
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: var(--secondary);
        padding: 32px;
        flex-direction: column;
        gap: 24px;
        z-index: 999;
      }
      .mobile-menu.active {
        display: flex;
      }
      .hero-text h1 {
        font-size: 2rem;
      }
      .section-title {
        font-size: 1.8rem;
      }
      .scenario-card {
        flex: 0 0 260px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }