/* roulang page: index */
:root {
      --primary: #0A3D2E;
      --primary-dark: #06261D;
      --highlight: #00C897;
      --accent: #FF6B35;
      --bg-warm: #F7F5F0;
      --white: #FFFFFF;
      --gray-light: #EDF5F2;
      --gray-border: #DDE8E3;
      --text-main: #1E2F2A;
      --text-soft: #5A6E65;
      --shadow-sm: 0px 4px 12px rgba(10, 61, 46, 0.06);
      --shadow-md: 0px 8px 30px rgba(10, 61, 46, 0.08);
      --shadow-lg: 0px 16px 40px rgba(10, 61, 46, 0.15);
      --radius-lg: 24px;
      --radius-md: 16px;
      --radius-pill: 50px;
      --transition: 0.3s ease;
      --font-title: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      --font-number: "DIN Alternate", "Arial", "Helvetica Neue", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-body);
      font-size: 16px;
      line-height: 1.75;
      font-weight: 400;
      color: var(--text-main);
      background-color: var(--bg-warm);
      -webkit-font-smoothing: antialiased;
    }

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

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

    button, input, select, textarea {
      font-family: inherit;
      font-size: inherit;
      border: none;
      outline: none;
      background: transparent;
    }

    ul {
      list-style: none;
    }

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

    /* 导航栏 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(12px);
      box-shadow: 0px 1px 0px rgba(10, 61, 46, 0.05);
      z-index: 1000;
      transition: box-shadow var(--transition), background var(--transition);
      display: flex;
      align-items: center;
    }

    .site-header.scrolled {
      box-shadow: 0px 4px 20px rgba(10, 61, 46, 0.08);
      background: rgba(255, 255, 255, 0.98);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-family: var(--font-title);
      font-weight: 700;
      font-size: 22px;
      color: var(--primary);
      letter-spacing: -0.3px;
    }

    .logo i {
      color: var(--highlight);
      font-size: 26px;
    }

    .desktop-nav {
      display: flex;
      align-items: center;
      gap: 32px;
    }

    .desktop-nav a {
      font-weight: 500;
      color: var(--text-main);
      position: relative;
      font-size: 15px;
    }

    .desktop-nav a:hover {
      color: var(--highlight);
    }

    .desktop-nav a.active {
      color: var(--primary);
      font-weight: 600;
    }

    .nav-cta {
      background: var(--highlight) !important;
      color: white !important;
      padding: 10px 22px;
      border-radius: var(--radius-pill);
      font-weight: 600 !important;
      transition: background var(--transition), transform var(--transition);
    }

    .nav-cta:hover {
      background: #00A87D !important;
      transform: translateY(-1px);
    }

    /* 移动端底部导航 */
    .mobile-bottom-nav {
      display: none;
    }

    /* 首屏 Hero */
    .hero {
      position: relative;
      background: linear-gradient(135deg, #06261D 0%, #0A4A3B 70%, #00C897 100%);
      min-height: 100vh;
      display: flex;
      align-items: center;
      overflow: hidden;
      padding-top: 72px;
    }

    .hero-bg {
      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: 0.2;
      mix-blend-mode: overlay;
      z-index: 0;
    }

    .hero .container {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .hero-content {
      color: white;
    }

    .hero-content h1 {
      font-family: var(--font-title);
      font-size: 48px;
      font-weight: 700;
      line-height: 1.2;
      letter-spacing: -0.5px;
      margin-bottom: 24px;
      text-shadow: 0 4px 20px rgba(0,0,0,0.3);
    }

    .hero-content .subtitle {
      font-size: 20px;
      font-weight: 400;
      opacity: 0.9;
      margin-bottom: 40px;
      color: #E0F2EC;
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 16px 40px;
      border-radius: var(--radius-pill);
      font-weight: 600;
      font-size: 16px;
      transition: background var(--transition), color var(--transition), border var(--transition), transform var(--transition);
      cursor: pointer;
      text-align: center;
    }

    .btn-primary {
      background: var(--accent);
      color: white;
    }

    .btn-primary:hover {
      background: #E85A26;
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(255, 107, 53, 0.4);
    }

    .btn-outline {
      border: 2px solid white;
      color: white;
      background: transparent;
    }

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

    .hero-data-card {
      background: rgba(255,255,255,0.15);
      backdrop-filter: blur(16px);
      border-radius: var(--radius-lg);
      padding: 40px;
      color: white;
      border: 1px solid rgba(255,255,255,0.3);
      box-shadow: 0 20px 40px rgba(0,0,0,0.2);
    }

    .hero-data-number {
      font-family: var(--font-number);
      font-size: 56px;
      font-weight: 700;
      color: var(--accent);
      line-height: 1;
    }

    .hero-data-label {
      font-size: 18px;
      margin-top: 8px;
      opacity: 0.9;
    }

    .hero-badge-list {
      display: flex;
      flex-direction: column;
      gap: 24px;
      margin-top: 32px;
    }

    .badge-item {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 15px;
    }

    .badge-dot {
      width: 8px;
      height: 8px;
      background: var(--highlight);
      border-radius: 50%;
    }

    /* 板块通用 */
    section {
      padding: 120px 0;
    }

    .section-title {
      font-family: var(--font-title);
      font-size: 36px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 16px;
    }

    .section-sub {
      font-size: 18px;
      color: var(--text-soft);
      margin-bottom: 48px;
    }

    /* 行业痛点 */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }

    .pain-card {
      background: var(--white);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      border-left: 6px solid var(--accent);
      transition: box-shadow var(--transition), transform var(--transition);
    }

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

    .pain-card h3 {
      font-size: 24px;
      font-weight: 600;
      margin-bottom: 12px;
      color: var(--primary);
    }

    /* 解决方案 */
    .solution-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }

    .solution-card {
      background: var(--white);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      transition: all var(--transition);
      display: flex;
      flex-direction: column;
    }

    .solution-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--highlight);
    }

    .solution-img {
      height: 200px;
      object-fit: cover;
      width: 100%;
    }

    .solution-content {
      padding: 28px 32px 32px;
      flex: 1;
    }

    .solution-content h3 {
      font-size: 22px;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 12px;
    }

    .text-link {
      color: var(--highlight);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      margin-top: 16px;
      cursor: pointer;
    }

    /* 数据成果 */
    .data-section {
      background: var(--primary);
      color: white;
      text-align: center;
    }

    .data-section .section-title {
      color: white;
    }

    .data-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      margin-top: 40px;
    }

    .data-badge {
      background: rgba(255,255,255,0.08);
      border-radius: var(--radius-lg);
      padding: 32px 16px;
    }

    .data-number {
      font-family: var(--font-number);
      font-size: 48px;
      font-weight: 700;
      color: var(--accent);
    }

    .data-text {
      font-size: 16px;
      opacity: 0.85;
    }

    /* 客户证言 */
    .testimonial-scroll {
      display: flex;
      gap: 32px;
      overflow-x: auto;
      padding: 20px 0;
      scroll-snap-type: x mandatory;
      -webkit-overflow-scrolling: touch;
    }

    .testimonial-card {
      flex: 0 0 380px;
      background: var(--gray-light);
      border-radius: var(--radius-lg);
      padding: 28px;
      border-left: 8px solid var(--highlight);
      scroll-snap-align: start;
    }

    .testimonial-text {
      font-style: italic;
      margin-bottom: 20px;
    }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid var(--gray-border);
    }

    .faq-question {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 20px 0;
      font-weight: 600;
      font-size: 18px;
      cursor: pointer;
      background: transparent;
      width: 100%;
      text-align: left;
    }

    .faq-answer {
      padding: 0 0 20px;
      display: none;
      color: var(--text-soft);
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    /* CTA */
    .cta-form {
      display: flex;
      gap: 16px;
      max-width: 500px;
      margin: 32px auto 0;
    }

    .cta-input {
      flex:1;
      border: 2px solid var(--gray-border);
      border-radius: var(--radius-pill);
      padding: 14px 24px;
      background: white;
    }

    .cta-input:focus {
      border-color: var(--highlight);
    }

    /* 页脚 */
    .footer {
      background: var(--primary-dark);
      color: #C0D0C8;
      padding: 80px 0 24px;
    }

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

    @media (max-width: 1024px) {
      .hero .container {
        grid-template-columns: 1fr;
      }
      .pain-grid, .solution-grid {
        grid-template-columns: repeat(2,1fr);
      }
    }

    @media (max-width: 768px) {
      .desktop-nav { display: none; }
      .mobile-bottom-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        background: white;
        box-shadow: 0 -4px 15px rgba(0,0,0,0.06);
        justify-content: space-around;
        padding: 12px 16px;
        z-index: 999;
      }
      .mobile-nav-item {
        display: flex;
        flex-direction: column;
        align-items: center;
        font-size: 12px;
        color: var(--text-soft);
      }
      .mobile-nav-cta {
        background: var(--accent);
        color: white;
        border-radius: 50%;
        width: 48px;
        height: 48px;
        display: flex;
        align-items: center;
        justify-content: center;
        margin-top: -20px;
        box-shadow: 0 6px 15px rgba(255,107,53,0.5);
      }
      .hero-content h1 { font-size: 36px; }
      .section-title { font-size: 28px; }
      .data-grid { grid-template-columns: repeat(2,1fr); }
      .footer-grid { grid-template-columns: 1fr; }
      section { padding: 80px 0; }
    }