/* roulang page: index */
:root {
      --primary: #9B6B4A;
      --primary-hover: #C49A6C;
      --accent: #C49A6C;
      --bg-deep: #2E2622;
      --bg-cream: #FCF9F4;
      --bg-warm: #F5EFE6;
      --text-main: #2C241E;
      --text-secondary: #6B5E53;
      --font-serif: 'Noto Serif SC', 'Source Han Serif SC', serif;
      --font-sans: 'Noto Sans SC', 'PingFang SC', sans-serif;
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-tag: 6px;
      --shadow-sm: 0 4px 20px rgba(44,36,30,0.06);
      --shadow-md: 0 8px 30px rgba(44,36,30,0.10);
    }
    * {
      box-sizing: border-box;
    }
    body {
      margin: 0;
      font-family: var(--font-sans);
      background-color: var(--bg-cream);
      color: var(--text-main);
      line-height: 1.7;
      scroll-behavior: smooth;
      -webkit-font-smoothing: antialiased;
    }
    h1, h2, h3, .serif {
      font-family: var(--font-serif);
      letter-spacing: -0.02em;
      line-height: 1.3;
    }
    .container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    .btn-primary {
      background-color: var(--primary);
      color: white;
      border-radius: var(--radius-btn);
      padding: 0.75rem 2rem;
      font-weight: 500;
      transition: all 0.25s ease;
      display: inline-block;
      text-align: center;
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      background-color: var(--accent);
      transform: translateY(-2px);
      box-shadow: var(--shadow-md);
    }
    .btn-outline {
      background: transparent;
      border: 1px solid var(--primary);
      color: var(--primary);
      border-radius: var(--radius-btn);
      padding: 0.75rem 2rem;
      font-weight: 500;
      transition: all 0.25s ease;
      display: inline-block;
      text-align: center;
    }
    .btn-outline:hover {
      background-color: rgba(155,107,74,0.08);
      transform: translateY(-2px);
    }
    .card {
      background: var(--bg-warm);
      border-radius: var(--radius-card);
      padding: 1.8rem;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
    }
    .card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
      background-color: #fffbf5;
    }
    .section-title {
      font-size: 1.75rem;
      font-weight: 700;
      margin-bottom: 1rem;
      color: var(--text-main);
    }
    .section-sub {
      color: var(--text-secondary);
      max-width: 640px;
      margin-bottom: 2.5rem;
    }
    .accent-line {
      width: 48px;
      height: 4px;
      background: var(--accent);
      border-radius: 2px;
      margin-bottom: 1rem;
    }
    /* 导航 */
    .nav-blur {
      backdrop-filter: blur(12px);
      background-color: rgba(252, 249, 244, 0.85);
      border-bottom: 1px solid rgba(107,94,83,0.15);
    }
    .nav-link {
      color: var(--text-secondary);
      font-weight: 500;
      position: relative;
      transition: color 0.2s;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--accent);
      transition: width 0.25s ease;
    }
    .nav-link:hover {
      color: var(--primary);
    }
    .nav-link:hover::after {
      width: 100%;
    }
    .badge-pulse {
      background: var(--primary);
      color: white;
      border-radius: 999px;
      padding: 0.2rem 0.8rem;
      font-size: 0.75rem;
      animation: softPulse 2s infinite;
      margin-left: 0.5rem;
    }
    @keyframes softPulse {
      0% { opacity: 1; }
      50% { opacity: 0.8; transform: scale(1.02); }
      100% { opacity: 1; }
    }
    /* 移动端菜单 */
    .mobile-menu {
      background: rgba(252, 249, 244, 0.98);
      backdrop-filter: blur(20px);
    }
    /* FAQ */
    .faq-item {
      border-bottom: 1px dashed rgba(107,94,83,0.3);
      padding: 1.2rem 0;
    }
    .faq-question {
      font-weight: 500;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: var(--text-main);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.2s;
      color: var(--text-secondary);
      line-height: 1.7;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-top: 0.8rem;
    }
    .faq-icon {
      font-size: 1.2rem;
      color: var(--primary);
      transition: transform 0.2s;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    /* 装饰 */
    .hero-overlay {
      background: linear-gradient(90deg, rgba(155,107,74,0.2) 0%, transparent 70%);
    }
    .price-highlight {
      border: 1px solid var(--primary);
      background: #fffbf5;
      position: relative;
    }
    .badge-recommend {
      background: var(--accent);
      color: white;
      font-size: 0.8rem;
      padding: 0.2rem 1rem;
      border-radius: 20px;
      position: absolute;
      top: -12px;
      right: 20px;
    }
    footer {
      background: var(--bg-deep);
      color: #D4C5B5;
    }
    footer a:hover {
      color: var(--accent);
    }
    @media (max-width: 1024px) {
      .desktop-nav { display: none; }
      .mobile-nav-btn { display: block; }
    }
    @media (min-width: 1025px) {
      .mobile-nav-btn { display: none; }
      .mobile-menu { display: none; }
    }