/* roulang page: index */
/* 自定义设计令牌与全局样式 */
    :root {
      --primary: #0D7377;
      --primary-dark: #095c5f;
      --accent: #F39C12;
      --accent-dark: #E67E22;
      --bg-light: #F8F9FA;
      --white: #FFFFFF;
      --text-main: #333333;
      --text-muted: #6B7280;
      --text-light: #AAAAAA;
      --border-light: #E5E7EB;
      --radius-sm: 8px;
      --radius: 12px;
      --radius-lg: 16px;
      --shadow-card: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-card-hover: 0 8px 30px rgba(0,0,0,0.08);
      --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --transition: all 0.25s ease;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      margin: 0;
      font-family: var(--font-sans);
      background-color: var(--white);
      color: var(--text-main);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    
    .container {
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
      width: 100%;
    }
    
    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      background: rgba(255,255,255,0.98);
      backdrop-filter: blur(6px);
      border-bottom: 1px solid var(--border-light);
      z-index: 1000;
      display: flex;
      align-items: center;
    }
    
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    
    .logo {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--primary);
      text-decoration: none;
      letter-spacing: -0.5px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    
    .logo img {
      height: 36px;
      width: auto;
    }
    
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
      margin: 0;
      padding: 0;
    }
    
    .nav-links a {
      text-decoration: none;
      color: var(--text-main);
      font-weight: 500;
      font-size: 0.95rem;
      transition: var(--transition);
      white-space: nowrap;
    }
    
    .nav-links a:hover {
      color: var(--primary);
    }
    
    .btn-nav-cta {
      background: var(--accent);
      color: white !important;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      transition: var(--transition);
    }
    
    .btn-nav-cta:hover {
      background: var(--accent-dark);
      transform: translateY(-1px);
    }
    
    .hamburger {
      display: none;
      font-size: 1.8rem;
      cursor: pointer;
      color: var(--text-main);
      background: none;
      border: none;
    }
    
    /* 移动端菜单 */
    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 24px 20px;
        gap: 20px;
        border-bottom: 1px solid var(--border-light);
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
        animation: fadeIn 0.2s ease;
      }
      .nav-links.active {
        display: flex;
      }
      .hamburger {
        display: block;
      }
      .btn-nav-cta {
        width: fit-content;
      }
    }
    
    @keyframes fadeIn {
      from { opacity: 0; transform: translateY(-8px); }
      to { opacity: 1; transform: translateY(0); }
    }
    
    /* 板块通用间距 */
    section {
      padding-top: 100px;
      padding-bottom: 100px;
    }
    
    @media (max-width: 768px) {
      section {
        padding-top: 60px;
        padding-bottom: 60px;
      }
    }
    
    h1 {
      font-size: 3rem;
      font-weight: 700;
      line-height: 1.2;
    }
    
    h2 {
      font-size: 2.25rem;
      font-weight: 600;
      line-height: 1.3;
      margin-bottom: 1.5rem;
    }
    
    @media (max-width: 768px) {
      h1 { font-size: 2rem; }
      h2 { font-size: 1.75rem; }
    }
    
    /* 卡片系统 */
    .card {
      background: var(--white);
      border-radius: var(--radius);
      box-shadow: var(--shadow-card);
      padding: 32px;
      transition: var(--transition);
    }
    
    .card:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-2px);
    }
    
    /* 按钮 */
    .btn-primary {
      background: var(--accent);
      color: white;
      border: none;
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 1rem;
      cursor: pointer;
      transition: var(--transition);
      display: inline-block;
      text-decoration: none;
    }
    
    .btn-primary:hover {
      background: var(--accent-dark);
    }
    
    .btn-outline {
      background: transparent;
      border: 1px solid var(--primary);
      color: var(--primary);
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      transition: var(--transition);
      display: inline-block;
      text-decoration: none;
    }
    
    .btn-outline:hover {
      background: rgba(13,115,119,0.08);
    }
    
    /* Hero 背景 */
    .hero-bg {
      background-image: url('/assets/images/backpic/hero-bg.jpg');
      background-size: cover;
      background-position: center;
      position: relative;
    }
    
    .hero-overlay {
      background: rgba(9, 92, 95, 0.45);
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
    }
    
    /* FAQ 手风琴 */
    .faq-item {
      border-bottom: 1px solid var(--border-light);
    }
    .faq-question {
      width: 100%;
      background: white;
      border: none;
      padding: 20px 0;
      text-align: left;
      font-weight: 600;
      font-size: 1.1rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      color: var(--text-main);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      color: var(--text-muted);
      padding: 0 0;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 0 0 20px 0;
    }
    .faq-item.active .faq-question {
      color: var(--primary);
      font-weight: 700;
    }

.grid{display:grid;} @media(max-width:768px){.grid{grid-template-columns:1fr;}}