/* roulang page: index */
/* 自定义设计变量与全局样式 */
    :root {
      --primary-green: #0C9E47;
      --deep-green: #0A2E1F;
      --accent-orange: #F04E23;
      --warm-gold: #D4A843;
      --bg-light: #F4F9F5;
      --text-main: #1E2B24;
      --text-soft: #4A5B50;
      --border-light: rgba(10, 143, 60, 0.15);
      --card-shadow: 0 8px 30px rgba(10, 143, 60, 0.08);
      --card-shadow-hover: 0 18px 40px rgba(10, 143, 60, 0.15);
      --radius-card: 24px;
      --radius-btn: 40px;
      --radius-badge: 20px;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.7;
      margin: 0;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

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

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

    /* 容器与栅格 */
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    @media (max-width: 768px) {
      .container {
        padding-left: 20px;
        padding-right: 20px;
      }
    }

    /* 导航栏 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 50;
      transition: all 0.3s ease;
      background: transparent;
      padding: 16px 0;
    }

    .navbar.scrolled {
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      box-shadow: 0 4px 20px rgba(0,0,0,0.04);
      padding: 12px 0;
    }

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

    .logo {
      font-size: 1.6rem;
      font-weight: 700;
      color: white;
      display: flex;
      align-items: center;
      gap: 8px;
      transition: color 0.3s;
    }
    .navbar.scrolled .logo {
      color: var(--primary-green);
    }
    .logo i {
      font-size: 1.8rem;
      color: var(--accent-orange);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .nav-links a {
      font-weight: 500;
      color: rgba(255,255,255,0.9);
      transition: color 0.2s;
      font-size: 0.95rem;
    }
    .navbar.scrolled .nav-links a {
      color: var(--text-main);
    }
    .nav-links a:hover {
      color: var(--accent-orange);
    }
    .btn-nav-cta {
      background: var(--accent-orange);
      color: white !important;
      padding: 10px 24px;
      border-radius: 40px;
      font-weight: 600;
      transition: all 0.25s;
      box-shadow: 0 4px 12px rgba(240,78,35,0.3);
    }
    .btn-nav-cta:hover {
      background: #D03D1C;
      transform: scale(1.03);
    }

    /* 移动端底部导航 */
    .mobile-bottom-nav {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: white;
      box-shadow: 0 -4px 15px rgba(0,0,0,0.06);
      z-index: 50;
      padding: 8px 16px;
      justify-content: space-around;
      border-top-left-radius: 24px;
      border-top-right-radius: 24px;
    }
    .mobile-bottom-nav a {
      display: flex;
      flex-direction: column;
      align-items: center;
      font-size: 0.7rem;
      color: var(--text-soft);
      gap: 4px;
      font-weight: 500;
    }
    .mobile-bottom-nav i {
      font-size: 1.3rem;
    }

    /* Hero 区域 */
    .hero-section {
      min-height: 100vh;
      background: linear-gradient(135deg, #0A2E1F 0%, #0C9E47 100%);
      display: flex;
      align-items: center;
      position: relative;
      overflow: hidden;
      padding-top: 80px;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.25;
      mix-blend-mode: overlay;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      width: 100%;
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 48px;
    }
    .hero-left {
      flex: 1;
    }
    .hero-right {
      flex: 1;
      display: flex;
      justify-content: center;
    }
    .hero-right img {
      max-height: 400px;
      border-radius: 32px;
      box-shadow: 0 25px 50px rgba(0,0,0,0.3);
    }
    .hero-title {
      font-size: 3.4rem;
      font-weight: 800;
      color: white;
      line-height: 1.2;
      margin-bottom: 20px;
    }
    .hero-sub {
      font-size: 1.2rem;
      color: rgba(255,255,255,0.85);
      margin-bottom: 32px;
    }
    .hero-badges {
      display: flex;
      gap: 32px;
      margin-top: 40px;
    }
    .badge-item {
      text-align: center;
      color: white;
    }
    .badge-number {
      font-size: 2rem;
      font-weight: 700;
      color: var(--accent-orange);
      font-variant-numeric: tabular-nums;
    }

    /* 按钮样式 */
    .btn-primary {
      background: var(--accent-orange);
      color: white;
      padding: 14px 36px;
      border-radius: 40px;
      font-weight: 700;
      display: inline-block;
      transition: all 0.25s;
      border: none;
      cursor: pointer;
      box-shadow: 0 6px 18px rgba(240,78,35,0.3);
    }
    .btn-primary:hover {
      background: #D03D1C;
      transform: scale(1.03);
    }
    .btn-outline {
      border: 2px solid var(--primary-green);
      color: var(--primary-green);
      padding: 12px 32px;
      border-radius: 40px;
      font-weight: 600;
      background: transparent;
      transition: 0.25s;
    }
    .btn-outline:hover {
      background: rgba(12,158,71,0.08);
    }

    /* 卡片系统 */
    .card {
      background: white;
      border-radius: var(--radius-card);
      box-shadow: var(--card-shadow);
      transition: all 0.25s ease;
      overflow: hidden;
    }
    .card:hover {
      transform: translateY(-6px);
      box-shadow: var(--card-shadow-hover);
    }
    .feature-icon {
      width: 72px;
      height: 72px;
      background: #E9F6EF;
      border-radius: 20px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-green);
      font-size: 2rem;
    }

    /* 数据徽章 */
    .data-badge {
      background: #E9F6EF;
      color: var(--deep-green);
      padding: 6px 16px;
      border-radius: 20px;
      font-weight: 600;
      font-size: 0.8rem;
      display: inline-block;
    }

    /* 板块标题 */
    .section-title {
      font-size: 2.4rem;
      font-weight: 700;
      color: var(--deep-green);
      margin-bottom: 16px;
    }

    /* FAQ 手风琴 */
    .faq-item {
      background: white;
      border-radius: 16px;
      margin-bottom: 16px;
      box-shadow: 0 4px 12px rgba(0,0,0,0.02);
      transition: 0.2s;
    }
    .faq-question {
      padding: 20px 24px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
      color: var(--primary-green);
    }

    /* 响应式 */
    @media (max-width: 1024px) {
      .hero-grid {
        flex-direction: column;
        text-align: center;
      }
      .hero-badges {
        justify-content: center;
      }
    }
    @media (max-width: 768px) {
      .desktop-nav { display: none; }
      .mobile-bottom-nav { display: flex; }
      .navbar { display: none; }
      .hero-section { min-height: 70vh; background: linear-gradient(180deg, #0A2E1F, #0C9E47); }
      .hero-title { font-size: 2.2rem; }
      .section-title { font-size: 2rem; }
    }