/* roulang page: index */
:root {
      --primary: #FF6B4A;
      --primary-hover: #e55a3b;
      --secondary: #1E1E24;
      --accent: #00C2BA;
      --bg: #FAFAF8;
      --white: #FFFFFF;
      --text-main: #1E1E24;
      --text-body: #4A4A55;
      --text-muted: #8C8C96;
      --border-light: #E8E8EC;
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-nav: 20px;
      --shadow-card: 0 2px 12px rgba(0,0,0,0.04);
      --shadow-card-hover: 0 8px 24px rgba(0,0,0,0.08);
      --shadow-nav: 0 4px 20px rgba(0,0,0,0.06);
      --font-title: 'PingFang SC', 'Noto Sans SC', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
      --font-body: 'PingFang SC', 'Noto Sans SC', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
      --transition-smooth: 0.2s ease;
    }

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

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

    body {
      font-family: var(--font-body);
      background-color: var(--bg);
      color: var(--text-body);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

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

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

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      transition: var(--transition-smooth);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: none;
      background: none;
      font-weight: 600;
      border-radius: var(--radius-btn);
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 浮动Dock导航 */
    .dock-nav {
      position: fixed;
      top: 24px;
      left: 50%;
      transform: translateX(-50%);
      width: calc(100% - 48px);
      max-width: 1100px;
      background: rgba(255,255,255,0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-radius: var(--radius-nav);
      padding: 12px 28px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: var(--shadow-nav);
      z-index: 1000;
      transition: background 0.3s ease, box-shadow 0.3s ease;
    }

    .dock-nav.scrolled {
      background: rgba(255,255,255,0.95);
      box-shadow: 0 6px 24px rgba(0,0,0,0.08);
    }

    .logo {
      font-family: var(--font-title);
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.5px;
      white-space: nowrap;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }

    .nav-links a {
      font-weight: 500;
      color: var(--text-body);
      font-size: 0.95rem;
      padding: 6px 0;
      border-bottom: 2px solid transparent;
      transition: color 0.2s, border-color 0.2s;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
      border-bottom-color: var(--primary);
    }

    .nav-cta {
      background: var(--primary);
      color: white;
      padding: 10px 22px;
      border-radius: 30px;
      font-size: 0.9rem;
      font-weight: 600;
      white-space: nowrap;
      box-shadow: 0 4px 10px rgba(255,107,74,0.25);
    }

    .nav-cta:hover {
      background: var(--primary-hover);
      transform: scale(1.02);
      box-shadow: 0 6px 14px rgba(255,107,74,0.35);
    }

    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.6rem;
      color: var(--text-main);
    }

    /* 移动端底部Dock */
    .mobile-dock {
      display: none;
      position: fixed;
      bottom: 16px;
      left: 50%;
      transform: translateX(-50%);
      width: calc(100% - 40px);
      max-width: 480px;
      background: rgba(30,30,36,0.92);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-radius: 40px;
      padding: 10px 22px;
      justify-content: space-around;
      align-items: center;
      box-shadow: 0 10px 30px rgba(0,0,0,0.3);
      z-index: 1100;
    }

    .mobile-dock a, .mobile-dock button {
      color: rgba(255,255,255,0.8);
      font-size: 1.3rem;
      display: flex;
      flex-direction: column;
      align-items: center;
      font-size: 0.7rem;
      gap: 4px;
    }

    .mobile-dock .nav-cta-mobile {
      background: var(--primary);
      color: white;
      padding: 10px 18px;
      border-radius: 30px;
      font-weight: 600;
      font-size: 0.8rem;
    }

    /* Hero */
    .hero {
      padding: 160px 0 100px;
      display: flex;
      align-items: center;
      gap: 60px;
    }

    .hero-content {
      flex: 1;
    }

    .hero h1 {
      font-family: var(--font-title);
      font-weight: 700;
      font-size: 3.4rem;
      line-height: 1.2;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.8px;
    }

    .hero-sub {
      font-size: 1.2rem;
      color: var(--text-body);
      margin-bottom: 32px;
      max-width: 480px;
    }

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

    .btn-primary {
      background: var(--primary);
      color: white;
      padding: 14px 32px;
      border-radius: 30px;
      font-weight: 600;
      box-shadow: 0 6px 16px rgba(255,107,74,0.3);
    }

    .btn-primary:hover {
      background: var(--primary-hover);
      transform: scale(1.02);
    }

    .btn-outline {
      border: 2px solid var(--secondary);
      color: var(--secondary);
      padding: 14px 32px;
      border-radius: 30px;
      font-weight: 600;
      background: transparent;
    }

    .btn-outline:hover {
      background: var(--secondary);
      color: white;
    }

    .hero-image {
      flex: 1;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: 32px;
      height: 380px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.15);
      position: relative;
      overflow: hidden;
    }

    .hero-image::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(255,107,74,0.2) 0%, rgba(0,194,186,0.15) 100%);
    }

    /* 板块通用 */
    section {
      padding: 80px 0;
    }

    .section-title {
      font-family: var(--font-title);
      font-weight: 700;
      font-size: 2.3rem;
      color: var(--text-main);
      margin-bottom: 16px;
    }

    .section-desc {
      color: var(--text-muted);
      max-width: 600px;
      margin-bottom: 48px;
      font-size: 1.1rem;
    }

    /* 核心优势 大数字风格 */
    .features-grid {
      display: flex;
      flex-direction: column;
      gap: 40px;
    }

    .feature-item {
      display: flex;
      align-items: flex-start;
      gap: 24px;
    }

    .feature-number {
      font-size: 4rem;
      font-weight: 700;
      color: var(--accent);
      opacity: 0.15;
      line-height: 1;
      min-width: 100px;
      font-family: 'DIN Alternate', 'PingFang SC', sans-serif;
    }

    .feature-text h3 {
      font-size: 1.5rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    /* 产品分组 横向卡片 */
    .product-card {
      display: flex;
      background: var(--white);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      margin-bottom: 32px;
      overflow: hidden;
      transition: var(--transition-smooth);
    }

    .product-card:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-4px);
    }

    .product-img {
      width: 40%;
      background-size: cover;
      background-position: center;
      min-height: 260px;
      transition: transform 0.3s ease;
    }

    .product-card:hover .product-img {
      transform: scale(1.03);
    }

    .product-info {
      padding: 36px;
      width: 60%;
    }

    .product-info h3 {
      font-size: 1.6rem;
      font-weight: 650;
      margin-bottom: 12px;
    }

    .feature-list {
      list-style: none;
      margin: 16px 0 20px;
    }

    .feature-list li {
      padding-left: 24px;
      position: relative;
      margin-bottom: 8px;
      color: var(--text-body);
    }

    .feature-list li::before {
      content: '';
      position: absolute;
      left: 0;
      top: 8px;
      width: 8px;
      height: 8px;
      background: var(--primary);
      border-radius: 50%;
    }

    .text-accent {
      color: var(--primary);
      font-weight: 600;
      font-size: 0.95rem;
    }

    /* 场景交替 */
    .scenario-row {
      display: flex;
      align-items: center;
      gap: 60px;
      margin-bottom: 80px;
    }

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

    .scenario-img {
      flex: 1;
      border-radius: 24px;
      height: 300px;
      background-size: cover;
    }

    .scenario-text {
      flex: 1;
    }

    /* 案例卡片 */
    .cases-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 20px;
      scrollbar-width: thin;
    }

    .case-card {
      min-width: 240px;
      background: white;
      border-radius: 16px;
      padding: 24px;
      box-shadow: var(--shadow-card);
      flex-shrink: 0;
    }

    .case-number {
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--primary);
    }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      padding: 16px 0;
    }

    .faq-question {
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
      color: var(--text-main);
      font-size: 1.1rem;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      padding-left: 16px;
      color: var(--text-body);
    }

    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-top: 12px;
    }

    /* CTA */
    .cta-block {
      background: var(--primary);
      border-radius: 40px;
      padding: 70px 40px;
      text-align: center;
      color: white;
    }

    .cta-block h2 {
      font-size: 2.4rem;
      font-weight: 700;
      margin-bottom: 20px;
    }

    .input-group {
      display: flex;
      max-width: 420px;
      margin: 24px auto 0;
      background: white;
      border-radius: 40px;
      overflow: hidden;
    }

    .input-group input {
      flex:1;
      border: none;
      padding: 14px 20px;
      outline: none;
    }

    .input-group button {
      background: var(--secondary);
      color: white;
      padding: 0 28px;
      font-weight: 600;
    }

    /* Footer */
    .footer {
      background: var(--secondary);
      color: #D0D0D6;
      padding: 60px 0 20px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }

    .footer a:hover {
      color: var(--primary);
    }

    @media (max-width: 1024px) {
      .hero {
        flex-direction: column;
        padding-top: 130px;
      }
      .product-card {
        flex-direction: column;
      }
      .product-img, .product-info {
        width: 100%;
      }
      .scenario-row {
        flex-direction: column;
        gap: 30px;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .dock-nav {
        display: none;
      }
      .mobile-dock {
        display: flex;
      }
      .hero h1 {
        font-size: 2.4rem;
      }
      .section-title {
        font-size: 1.9rem;
      }
      .features-grid {
        gap: 24px;
      }
      .feature-number {
        font-size: 3rem;
        min-width: 70px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }