/* roulang page: index */
@tailwind base;
    @tailwind components;
    @tailwind utilities;

    :root {
      --color-primary: #0A7E3D;
      --color-primary-dark: #065A2B;
      --color-accent: #F57C00;
      --color-accent-hover: #E06900;
      --color-dark: #1A1D23;
      --color-bg: #FAFBF8;
      --color-card: #FFFFFF;
      --color-border: #E8EDE5;
      --font-heading: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      --font-body: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
      --font-mono: "DIN Alternate", "Roboto Mono", "Menlo", monospace;
      --radius-card: 12px;
      --radius-btn: 8px;
      --shadow-card: 0 4px 12px rgba(26, 29, 35, 0.06);
      --shadow-card-hover: 0 12px 28px rgba(26, 29, 35, 0.12);
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-body);
      background-color: var(--color-bg);
      color: #334155;
      line-height: 1.7;
      margin: 0;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

    h1, h2, h3, h4, h5, h6 {
      font-family: var(--font-heading);
      color: var(--color-dark);
    }

    a {
      color: inherit;
      text-decoration: none;
    }

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

    button, input, textarea, select {
      font-family: inherit;
    }

    /* 导航 */
    .navbar {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--color-border);
      height: 72px;
      display: flex;
      align-items: center;
    }

    .nav-container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
      width: 100%;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

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

    .logo svg {
      width: 28px;
      height: 28px;
      fill: currentColor;
    }

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

    .desktop-menu a {
      font-size: 15px;
      font-weight: 500;
      color: var(--color-dark);
      transition: color 0.2s;
      position: relative;
      padding-bottom: 4px;
    }

    .desktop-menu a::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%) scaleX(0);
      width: 100%;
      height: 2px;
      background: var(--color-primary);
      transition: transform 0.2s ease;
    }

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

    .desktop-menu a:hover::after {
      transform: translateX(-50%) scaleX(1);
    }

    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      padding: 8px;
      cursor: pointer;
      color: var(--color-dark);
    }

    .mobile-menu {
      position: fixed;
      top: 72px;
      left: 0;
      width: 100%;
      height: 0;
      overflow: hidden;
      background: var(--color-bg);
      transition: height 0.35s ease;
      z-index: 40;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 24px;
    }

    .mobile-menu.open {
      height: calc(100vh - 72px);
    }

    .mobile-menu a {
      font-size: 22px;
      font-weight: 600;
      color: var(--color-dark);
      padding: 12px 24px;
      transition: color 0.2s;
    }

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

    @media (max-width: 1024px) {
      .desktop-menu {
        display: none;
      }
      .mobile-toggle {
        display: block;
      }
    }

    /* Hero */
    .hero {
      background-image: linear-gradient(135deg, rgba(26, 29, 35, 0.85) 0%, rgba(10, 126, 61, 0.6) 100%), url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      min-height: 100vh;
      display: flex;
      align-items: center;
      color: white;
    }

    .hero-content {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      max-width: 1280px;
      margin: 0 auto;
      padding: 40px 24px;
      width: 100%;
      gap: 48px;
    }

    .hero-text {
      flex: 1 1 500px;
    }

    .hero-text h1 {
      font-size: clamp(2.4rem, 5vw, 3.8rem);
      font-weight: 700;
      line-height: 1.15;
      color: white;
      margin-bottom: 20px;
    }

    .hero-text p {
      font-size: 1.25rem;
      opacity: 0.9;
      margin-bottom: 32px;
      max-width: 550px;
    }

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

    .btn-primary {
      background: var(--color-accent);
      color: white;
      font-weight: 600;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      border: none;
      cursor: pointer;
      transition: background 0.2s, transform 0.2s;
      display: inline-block;
    }

    .btn-primary:hover {
      background: var(--color-accent-hover);
      transform: scale(1.03);
    }

    .btn-secondary {
      background: transparent;
      border: 2px solid white;
      color: white;
      font-weight: 600;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      cursor: pointer;
      transition: all 0.2s;
      display: inline-block;
    }

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

    .hero-image {
      flex: 1 1 400px;
      display: flex;
      justify-content: center;
    }

    .hero-image img {
      max-width: 450px;
      width: 100%;
      animation: float 4s ease-in-out infinite;
      border-radius: 24px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.3);
    }

    @keyframes float {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-12px); }
    }

    @media (max-width: 768px) {
      .hero-content {
        flex-direction: column;
        text-align: center;
      }
      .hero-text p {
        margin-left: auto;
        margin-right: auto;
      }
      .hero-buttons {
        justify-content: center;
      }
    }

    /* 普通区块 */
    .section {
      padding: 80px 24px;
    }

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

    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      text-align: center;
      margin-bottom: 16px;
      color: var(--color-dark);
    }

    .section-subtitle {
      text-align: center;
      color: #475569;
      margin-bottom: 56px;
      font-size: 1.1rem;
    }

    /* 卡片网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 32px;
    }

    .feature-card {
      background: var(--color-card);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      box-shadow: var(--shadow-card);
      transition: transform 0.25s, box-shadow 0.25s;
      text-align: center;
    }

    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-card-hover);
    }

    .feature-icon {
      width: 72px;
      height: 72px;
      background: rgba(10, 126, 61, 0.08);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 20px;
      transition: transform 0.2s;
    }

    .feature-card:hover .feature-icon {
      transform: scale(1.08);
    }

    /* 数据面板 */
    .data-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding: 16px 0 24px;
      scrollbar-width: none;
      -ms-overflow-style: none;
    }

    .data-scroll::-webkit-scrollbar {
      display: none;
    }

    .data-card {
      background: var(--color-dark);
      color: white;
      border-radius: var(--radius-card);
      padding: 28px 24px;
      min-width: 200px;
      flex-shrink: 0;
    }

    .data-number {
      font-family: var(--font-mono);
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--color-accent);
      margin-bottom: 8px;
    }

    /* 解决方案左右交替 */
    .solution-row {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 48px;
      margin-bottom: 64px;
    }

    .solution-img, .solution-text {
      flex: 1 1 400px;
    }

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

    /* 案例 */
    .case-logo-wall {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 40px;
      margin-bottom: 48px;
    }

    .case-logo {
      filter: grayscale(100%);
      opacity: 0.7;
      transition: filter 0.25s, opacity 0.25s;
      width: 100px;
    }

    .case-logo:hover {
      filter: grayscale(0%);
      opacity: 1;
    }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid var(--color-border);
      padding: 24px 0;
      cursor: pointer;
    }

    .faq-question {
      display: flex;
      align-items: center;
      gap: 16px;
      font-weight: 600;
      font-size: 1.1rem;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
      padding-left: 44px;
      color: #475569;
    }

    .faq-item.open .faq-answer {
      max-height: 300px;
      padding-top: 16px;
    }

    /* CTA */
    .cta-band {
      background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-dark) 100%);
      color: white;
      text-align: center;
      padding: 80px 24px;
    }

    /* Footer */
    .footer {
      background: var(--color-dark);
      color: #cbd5e1;
      padding: 64px 24px 32px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 40px;
      max-width: 1280px;
      margin: 0 auto;
    }

    .footer a:hover {
      text-decoration: underline;
    }

    @media (max-width: 640px) {
      .section {
        padding: 56px 16px;
      }
      .data-card {
        min-width: 160px;
      }
    }