/* roulang page: index */
:root {
      --primary: #FF6B5B;
      --primary-hover: #E55A4C;
      --primary-light: #FFF0ED;
      --secondary: #1E1E24;
      --accent: #D4A843;
      --accent-light: #F7F2E8;
      --bg: #FAF8F5;
      --bg-alt: #F2F0EC;
      --white: #FFFFFF;
      --text-title: #1E1E24;
      --text-body: #5A5A66;
      --text-muted: #9A9AA3;
      --border-light: rgba(0,0,0,0.05);
      --shadow-card: 0 2px 12px rgba(0,0,0,0.04);
      --shadow-hover: 0 12px 32px rgba(0,0,0,0.08);
      --shadow-nav: 0 2px 16px rgba(0,0,0,0.06);
      --radius-card: 17px;
      --radius-btn: 10px;
      --radius-tag: 20px;
      --font-heading: 'Noto Sans SC', system-ui, sans-serif;
      --font-body: 'Noto Sans SC', system-ui, sans-serif;
      --font-number: 'Inter', system-ui, sans-serif;
      --transition: 0.25s cubic-bezier(0.2, 0.0, 0, 1.0);
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-body);
      background-color: var(--bg);
      color: var(--text-body);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    h1, h2, h3, h4, .nav-brand, .btn, .number-large {
      font-family: var(--font-heading);
      font-weight: 700;
      color: var(--text-title);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    .container {
      max-width: 1260px;
      margin: 0 auto;
      padding: 0 32px;
    }
    @media (max-width: 767px) {
      .container {
        padding: 0 20px;
      }
    }
    /* 导航栏 sticky */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255,255,255,0.96);
      backdrop-filter: blur(12px);
      box-shadow: 0 1px 0 rgba(0,0,0,0.03);
      transition: box-shadow var(--transition);
      height: 76px;
      display: flex;
      align-items: center;
    }
    .site-header.scroll-shadow {
      box-shadow: var(--shadow-nav);
    }
    .nav-bar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    .brand {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--text-title);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .brand .accent-dot {
      width: 10px;
      height: 10px;
      background: var(--accent);
      border-radius: 2px;
      display: inline-block;
      margin-left: 4px;
    }
    .nav-links {
      display: flex;
      gap: 36px;
      align-items: center;
    }
    .nav-links a {
      font-weight: 500;
      color: var(--text-title);
      font-size: 1rem;
      transition: color var(--transition);
      position: relative;
    }
    .nav-links a:hover {
      color: var(--primary);
    }
    .btn-primary {
      background: var(--primary);
      color: white;
      border: none;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 1rem;
      cursor: pointer;
      transition: all var(--transition);
      display: inline-flex;
      align-items: center;
      gap: 6px;
      letter-spacing: 0.3px;
      box-shadow: 0 4px 10px rgba(255,107,91,0.25);
      white-space: nowrap;
    }
    .btn-primary:hover {
      background: var(--primary-hover);
      transform: scale(1.03);
      box-shadow: 0 12px 24px rgba(229,90,76,0.25);
    }
    .btn-secondary {
      background: transparent;
      border: 1.8px solid var(--text-title);
      color: var(--text-title);
      padding: 11px 26px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: all var(--transition);
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .btn-secondary:hover {
      background: var(--text-title);
      color: white;
    }
    .btn-accent {
      background: var(--accent);
      color: #1E1E24;
      font-weight: 700;
      padding: 16px 42px;
      border-radius: var(--radius-btn);
      font-size: 1.2rem;
      border: none;
      transition: all 0.3s ease;
      cursor: pointer;
      box-shadow: 0 8px 18px rgba(212,168,67,0.25);
    }
    .btn-accent:hover {
      filter: brightness(1.08);
      transform: translateY(-3px);
      box-shadow: 0 16px 28px rgba(212,168,67,0.3);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 6px;
      cursor: pointer;
      background: transparent;
      border: none;
    }
    .hamburger span {
      width: 28px;
      height: 2.5px;
      background: var(--text-title);
      border-radius: 4px;
      transition: var(--transition);
    }
    @media (max-width: 1023px) {
      .nav-links {
        gap: 22px;
        font-size: 0.95rem;
      }
    }
    @media (max-width: 767px) {
      .hamburger {
        display: flex;
      }
      .nav-links {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: var(--primary);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 36px;
        z-index: 99;
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links a {
        color: white;
        font-size: 1.8rem;
        font-weight: 600;
      }
    }
    /* 共用区块间距 */
    section {
      padding: 100px 0;
    }
    @media (max-width: 767px) {
      section {
        padding: 70px 0;
      }
    }
    .section-title {
      font-size: 2.4rem;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--text-title);
    }
    .section-sub {
      color: var(--text-body);
      font-size: 1.2rem;
      margin-bottom: 48px;
    }
    .grid-2, .grid-3, .grid-4 {
      display: grid;
      gap: 32px;
    }
    .grid-2 { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .grid-3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
    .grid-6 { grid-template-columns: repeat(6, minmax(120px,1fr)); }
    @media (max-width: 1023px) {
      .grid-3, .grid-4 { grid-template-columns: repeat(2, minmax(0,1fr)); }
    }
    @media (max-width: 700px) {
      .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    }

.card-service { background:white; border-radius:var(--radius-card); padding:16px; transition:all var(--transition); box-shadow:var(--shadow-card); }
    .card-service:hover { transform:translateY(-6px); box-shadow:var(--shadow-hover); }
    .arrow-link { color:var(--primary); font-weight:600; cursor:pointer; display:inline-block; margin-top:8px; transition:0.2s;}
    .card-service:hover .arrow-link { transform:translateX(6px); }
    .scene-card { background:white; border-radius:18px; overflow:hidden; box-shadow:var(--shadow-card); }
    .scene-img { height:200px; background-size:cover; }
    .tag { background:var(--accent); color:#1E1E24; padding:4px 14px; border-radius:20px; font-size:0.8rem; font-weight:600; margin:12px; display:inline-block; }
    .stat-item { display:flex; flex-direction:column; align-items:center; gap:8px; }
    .number-large { font-size:3.4rem; font-weight:700; color:var(--accent); font-family:var(--font-number); }
    .faq-item { border-bottom:1px solid #eee; padding:16px 0; }
    .faq-q { font-weight:700; cursor:pointer; display:flex; justify-content:space-between; }
    .faq-a { color:var(--text-body); margin-top:8px; font-size:0.95rem; }
    @media (max-width:767px){ h1{font-size:2.2rem!important;} .number-large{font-size:2.2rem;} }