/* roulang page: index */
/* 全局设计变量与重置 */
    :root {
      --gold: #C8A44E;
      --deep-dark: #1B1B1B;
      --warm-bg: #FBF8F2;
      --theatre-red: #8B1E3F;
      --text-primary: #2C2416;
      --text-secondary: #5A4E3C;
      --text-muted: #8C7B63;
      --success-green: #2D6A4F;
      --white: #FFFFFF;
      --border-light: #E8DFD0;
      --card-shadow: 0 8px 30px rgba(200,164,78,0.08);
      --card-shadow-hover: 0 12px 40px rgba(200,164,78,0.15);
      --radius-card: 12px;
      --radius-btn: 6px;
      --radius-input: 4px;
      --font-serif: 'Noto Serif SC', serif;
      --font-sans: 'Noto Sans SC', sans-serif;
      --font-display: 'Playfair Display', serif;
      --max-width: 1200px;
      --nav-height: 80px;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      scroll-padding-top: var(--nav-height);
    }
    body {
      font-family: var(--font-sans);
      font-size: 16px;
      line-height: 1.7;
      color: var(--text-primary);
      background-color: var(--warm-bg);
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    h1, h2, h3, h4 {
      font-family: var(--font-serif);
      font-weight: 600;
      line-height: 1.3;
      color: var(--text-primary);
    }
    h1 {
      font-size: 3rem;
      font-weight: 700;
    }
    h2 {
      font-size: 2.25rem;
      margin-bottom: 2rem;
      position: relative;
      display: inline-block;
    }
    h2:after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -8px;
      width: 60%;
      height: 3px;
      background: var(--gold);
      border-radius: 2px;
    }
    h3 {
      font-size: 1.375rem;
      font-weight: 600;
    }
    a {
      color: var(--gold);
      text-decoration: none;
      transition: color 0.2s;
    }
    a:hover {
      color: var(--theatre-red);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, .button {
      font-family: var(--font-sans);
      cursor: pointer;
      transition: all 0.25s ease;
    }
    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 1.5rem;
    }
    /* 导航栏 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(27,27,27,0.95);
      backdrop-filter: blur(8px);
      z-index: 1000;
      height: var(--nav-height);
      box-shadow: 0 2px 20px rgba(0,0,0,0.3);
      display: flex;
      align-items: center;
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 1.5rem;
    }
    .logo {
      font-family: var(--font-serif);
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--gold);
      letter-spacing: 1px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .logo i {
      font-size: 1.8rem;
      color: var(--gold);
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 2rem;
      list-style: none;
    }
    .nav-menu a {
      color: #FBF8F2;
      font-weight: 500;
      font-size: 0.95rem;
      letter-spacing: 0.5px;
      padding-bottom: 4px;
      border-bottom: 2px solid transparent;
      transition: all 0.2s;
    }
    .nav-menu a:hover,
    .nav-menu a.active {
      color: var(--gold);
      border-bottom-color: var(--gold);
    }
    .nav-cta {
      background: var(--gold);
      color: var(--deep-dark) !important;
      padding: 0.6rem 1.5rem !important;
      border-radius: var(--radius-btn);
      font-weight: 600;
      border: none;
      transition: 0.2s;
      margin-left: 1rem;
      white-space: nowrap;
    }
    .nav-cta:hover {
      background: #D4B96A;
      transform: translateY(-1px);
      box-shadow: 0 4px 12px rgba(200,164,78,0.4);
    }
    .menu-toggle {
      display: none;
      background: transparent;
      border: none;
      color: var(--gold);
      font-size: 1.8rem;
      cursor: pointer;
    }
    /* 移动端导航 */
    @media (max-width: 840px) {
      .menu-toggle {
        display: block;
      }
      .nav-menu {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        width: 100%;
        background: rgba(27,27,27,0.98);
        flex-direction: column;
        gap: 1.2rem;
        padding: 2rem 1.5rem;
        display: none;
        border-top: 1px solid var(--gold);
      }
      .nav-menu.active {
        display: flex;
      }
      .nav-cta {
        margin-left: 0;
        width: fit-content;
      }
    }
    /* Hero 区块 */
    #hero {
      background: var(--deep-dark);
      min-height: 100vh;
      display: flex;
      align-items: center;
      position: relative;
      overflow: hidden;
      margin-top: 0;
      padding-top: var(--nav-height);
    }
    .hero-gold-lines {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      pointer-events: none;
    }
    .hero-line {
      position: absolute;
      background: rgba(200,164,78,0.15);
      transform-origin: center;
    }
    .line1 { width: 1px; height: 120%; top: -10%; left: 20%; transform: rotate(25deg); }
    .line2 { width: 1px; height: 120%; top: -10%; right: 25%; transform: rotate(-15deg); }
    .line3 { width: 60%; height: 1px; top: 40%; left: 20%; transform: rotate(-5deg); }
    .hero-content {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 3rem;
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 2rem 1.5rem;
      position: relative;
      z-index: 2;
    }
    .hero-text {
      flex: 1;
    }
    .hero-text h1 {
      color: #FFFFFF;
      font-size: 3.2rem;
      font-weight: 700;
      margin-bottom: 1.5rem;
    }
    .hero-sub {
      color: var(--gold);
      font-size: 1.25rem;
      margin-bottom: 2.2rem;
      font-weight: 400;
    }
    .hero-buttons {
      display: flex;
      gap: 1.2rem;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--gold);
      color: var(--deep-dark);
      border: none;
      padding: 0.85rem 2.2rem;
      font-weight: 600;
      border-radius: var(--radius-btn);
      font-size: 1rem;
      letter-spacing: 0.5px;
    }
    .btn-primary:hover {
      background: #D4B96A;
      box-shadow: 0 8px 20px rgba(200,164,78,0.4);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--gold);
      color: var(--gold);
      padding: 0.85rem 2.2rem;
      font-weight: 600;
      border-radius: var(--radius-btn);
    }
    .btn-outline:hover {
      background: var(--gold);
      color: var(--deep-dark);
    }
    .hero-image {
      flex: 0.9;
      text-align: right;
    }
    .hero-image img {
      border-radius: 16px;
      border: 2px solid rgba(200,164,78,0.5);
      box-shadow: 0 20px 40px rgba(0,0,0,0.5);
    }
    @media (max-width: 840px) {
      .hero-content {
        flex-direction: column;
        text-align: center;
      }
      .hero-text h1 {
        font-size: 2.4rem;
      }
      .hero-image {
        text-align: center;
      }
    }
    /* 通用区块 */
    section {
      padding: 5rem 1.5rem;
    }
    .section-title {
      text-align: center;
      margin-bottom: 3rem;
    }
    .section-title h2 {
      display: inline-block;
    }
    /* 卡片网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 2rem;
    }
    .card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 2rem 1.5rem;
      box-shadow: var(--card-shadow);
      transition: all 0.3s ease;
      border-top: 4px solid var(--gold);
    }
    .card:hover {
      transform: translateY(-5px);
      box-shadow: var(--card-shadow-hover);
      border-top-width: 8px;
    }
    .card i {
      color: var(--gold);
      font-size: 2.5rem;
      margin-bottom: 1.2rem;
    }
    /* 数据条 */
    .data-row {
      display: flex;
      justify-content: space-around;
      text-align: center;
      background: var(--warm-bg);
      padding: 2.5rem 1rem;
      border-radius: var(--radius-card);
    }
    .data-item .number {
      font-family: var(--font-display);
      font-size: 3rem;
      font-weight: 700;
      color: var(--gold);
    }
    /* FAQ */
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      padding: 1.2rem 0;
    }
    .faq-question {
      font-weight: 600;
      font-size: 1.1rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: var(--text-secondary);
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      margin-top: 1rem;
    }
    /* CTA 区块 */
    .cta-block {
      background: var(--deep-dark);
      text-align: center;
      padding: 4rem 1.5rem;
      color: white;
    }
    /* 页脚 */
    .site-footer {
      background: var(--deep-dark);
      color: #A89F91;
      padding: 3rem 1.5rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 2rem;
    }
    @media (max-width: 768px) {
      .grid-3, .grid-2 { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .data-row { flex-wrap: wrap; gap: 1.5rem; }
    }