/* roulang page: index */
/* 全局设计变量与基础覆写 */
    :root {
      --primary-deep: #2E3A32;
      --bg-warm: #F5F2ED;
      --accent-gold: #C4A87C;
      --accent-gold-hover: #B09365;
      --text-muted: #7C8B8A;
      --card-bg: #FEFCF9;
      --border-light: #E2DFD8;
      --success-green: #3D5A45;
      --alert-red: #B55B4A;
      --shadow-card: 0 2px 12px rgba(46,58,50,0.04);
      --shadow-card-hover: 0 8px 28px rgba(46,58,50,0.08);
      --shadow-btn-hover: 0 4px 14px rgba(196,168,124,0.25);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-img: 6px;
      --transition-smooth: 0.25s ease;
      --font-serif: 'Noto Serif SC', 'Times New Roman', serif;
      --font-sans: 'Noto Sans SC', 'Inter', system-ui, -apple-system, sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--primary-deep);
      margin: 0;
      line-height: 1.7;
      font-weight: 400;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4 {
      font-family: var(--font-serif);
      font-weight: 600;
      color: var(--primary-deep);
      margin-top: 0;
    }

    h1 {
      font-size: 3rem;
      line-height: 1.15;
      letter-spacing: -0.02em;
      font-weight: 700;
    }

    h2 {
      font-size: 2.2rem;
      line-height: 1.25;
      font-weight: 600;
    }

    h3 {
      font-size: 1.4rem;
      line-height: 1.35;
      font-weight: 600;
    }

    p, li {
      color: var(--text-muted);
      font-size: 1rem;
      line-height: 1.7;
    }

    .text-small {
      font-size: 0.8rem;
      line-height: 1.4;
      letter-spacing: 0.05em;
      text-transform: uppercase;
      color: var(--text-muted);
    }

    a {
      color: var(--accent-gold);
      transition: color var(--transition-smooth);
      text-decoration: none;
    }

    a:hover {
      color: var(--accent-gold-hover);
    }

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

    /* 布局容器覆写 */
    .grid-container {
      max-width: 1200px;
      padding-left: 24px;
      padding-right: 24px;
    }

    .section-spacing {
      padding: 100px 0;
    }

    @media screen and (max-width: 1024px) {
      .section-spacing {
        padding: 80px 0;
      }
      h1 {
        font-size: 2.5rem;
      }
      h2 {
        font-size: 2rem;
      }
    }

    @media screen and (max-width: 640px) {
      .section-spacing {
        padding: 60px 0;
      }
      h1 {
        font-size: 2rem;
      }
      h2 {
        font-size: 1.8rem;
      }
      .grid-container {
        padding-left: 16px;
        padding-right: 16px;
      }
    }

    /* 按钮系统 */
    .btn {
      display: inline-block;
      font-weight: 600;
      border-radius: var(--radius-btn);
      text-align: center;
      transition: all var(--transition-smooth);
      cursor: pointer;
      border: none;
      font-family: var(--font-sans);
      padding: 14px 36px;
      font-size: 0.95rem;
      text-decoration: none;
      line-height: 1.2;
    }

    .btn-primary {
      background-color: var(--accent-gold);
      color: var(--bg-warm);
      box-shadow: none;
    }

    .btn-primary:hover {
      background-color: var(--accent-gold-hover);
      color: #fff;
      transform: translateY(-2px);
      box-shadow: var(--shadow-btn-hover);
    }

    .btn-secondary {
      background: transparent;
      border: 1.5px solid var(--primary-deep);
      color: var(--primary-deep);
    }

    .btn-secondary:hover {
      background-color: var(--primary-deep);
      color: var(--bg-warm);
      border-color: var(--primary-deep);
      transform: translateY(-2px);
    }

    @media screen and (max-width: 640px) {
      .btn {
        padding: 12px 24px;
        width: 100%;
        display: block;
        margin-bottom: 12px;
      }
    }

    /* 导航桌面 */
    .lejing-nav {
      background: var(--bg-warm);
      border-bottom: 1px solid var(--border-light);
      padding: 16px 0;
      position: sticky;
      top: 0;
      z-index: 40;
    }
    .nav-logo {
      font-family: var(--font-serif);
      font-weight: 700;
      font-size: 1.6rem;
      letter-spacing: 0.04em;
      color: var(--primary-deep);
    }
    .nav-logo:hover {
      color: var(--accent-gold);
    }
    .menu-item {
      color: var(--text-muted);
      margin-left: 32px;
      font-weight: 500;
      position: relative;
      padding-bottom: 4px;
      font-size: 0.95rem;
    }
    .menu-item:after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      width: 0;
      height: 2px;
      background: var(--accent-gold);
      transition: all 0.25s ease;
      transform: translateX(-50%);
    }
    .menu-item:hover {
      color: var(--accent-gold);
    }
    .menu-item:hover:after {
      width: 100%;
    }
    .nav-cta-btn {
      margin-left: 32px;
    }

    /* 移动端底部Tab (仅<1024px显示) */
    .mobile-tab-bar {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: #FEFCF9;
      border-top: 1px solid var(--border-light);
      height: 56px;
      z-index: 50;
      padding-bottom: env(safe-area-inset-bottom);
      justify-content: space-around;
      align-items: center;
    }
    .tab-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      color: var(--text-muted);
      font-size: 0.7rem;
      text-decoration: none;
      transition: color 0.2s;
    }
    .tab-item i {
      font-size: 1.4rem;
      margin-bottom: 2px;
    }
    .tab-item.active, .tab-item:hover {
      color: var(--accent-gold);
    }

    @media screen and (max-width: 1024px) {
      .desktop-nav-menu {
        display: none;
      }
      .mobile-tab-bar {
        display: flex;
      }
      body {
        padding-bottom: 70px;
      }
    }

    /* Hero双栏 */
    #hero {
      align-items: center;
    }
    .hero-image-wrapper {
      overflow: hidden;
      border-radius: var(--radius-card);
    }
    .hero-image {
      width: 100%;
      border-radius: var(--radius-card);
      animation: floatGentle 6s ease-in-out infinite;
    }
    @keyframes floatGentle {
      0% { transform: translateY(0); }
      50% { transform: translateY(-6px); }
      100% { transform: translateY(0); }
    }
    .trust-label {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      color: var(--text-muted);
      font-size: 0.8rem;
    }

    /* 卡片通用 */
    .magazine-card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      border: 1px solid var(--border-light);
      padding: 28px 24px;
      transition: all 0.3s ease;
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .magazine-card:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-3px);
    }
    .icon-accent {
      color: var(--accent-gold);
      font-size: 2.2rem;
      margin-bottom: 16px;
    }

    /* 案例卡片 */
    .case-card {
      position: relative;
      overflow: hidden;
      border-radius: var(--radius-card) var(--radius-card) 0 0;
      background: var(--card-bg);
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
    }
    .case-card img {
      aspect-ratio: 4 / 3;
      object-fit: cover;
      width: 100%;
      border-radius: var(--radius-img) var(--radius-img) 0 0;
      transition: transform 0.3s ease;
    }
    .case-card:hover img {
      transform: scale(1.03);
    }
    .case-overlay {
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      background: rgba(46,58,50,0.8);
      color: white;
      padding: 16px;
      transform: translateY(100%);
      transition: transform 0.3s ease-out;
      display: flex;
      flex-direction: column;
      gap: 4px;
    }
    .case-card:hover .case-overlay {
      transform: translateY(0);
    }
    .case-tag {
      color: var(--accent-gold);
      font-size: 0.75rem;
      font-weight: 600;
    }

    /* 对比卡片 */
    .compare-card {
      background: var(--card-bg);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .vs-divider {
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      padding: 16px 0;
      cursor: pointer;
    }
    .faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      color: var(--primary-deep);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.25s ease, padding 0.25s ease;
      color: var(--text-muted);
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-top: 12px;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: var(--accent-gold);
    }
    .faq-icon {
      transition: transform 0.25s ease;
    }

    /* 页脚 */
    .site-footer {
      background: #FEFCF9;
      padding: 48px 0 24px;
      color: var(--text-muted);
      font-size: 0.9rem;
    }
    .footer-links a {
      display: block;
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .footer-links a:hover {
      color: var(--accent-gold);
    }
    .social-icons i {
      font-size: 1.4rem;
      margin-right: 16px;
      color: var(--text-muted);
      transition: color 0.2s;
    }
    .social-icons i:hover {
      color: var(--accent-gold);
    }