/* roulang page: index */
/* ----- 设计变量与重置 ----- */
    :root {
      --primary-deep: #2D1B4E;
      --primary-gradient: linear-gradient(135deg, #4A3A7A 0%, #1C3D5C 100%);
      --accent-gold: #D4AF37;
      --accent-gold-hover: #B8922E;
      --bg-page: #F7F4FC;
      --card-white: #FFFFFF;
      --footer-dark: #1A1030;
      --text-primary: #1E1B2E;
      --text-secondary: #5A5670;
      --text-muted: #8A8698;
      --border-light: #EBE8F5;
      --shadow-card: 0 4px 20px rgba(45,27,78,0.06);
      --shadow-hover: 0 16px 40px rgba(45,27,78,0.12);
      --radius-lg: 24px;
      --radius-md: 16px;
      --radius-sm: 12px;
      --radius-full: 50px;
      --transition: 0.3s ease;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Inter', system-ui, -apple-system, sans-serif;
      --font-display: 'Outfit', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-page);
      color: var(--text-primary);
      line-height: 1.8;
      font-size: 1rem;
      -webkit-font-smoothing: antialiased;
    }

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

    a {
      text-decoration: none;
      color: inherit;
    }

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      border: none;
      background: none;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 板块间距 */
    section {
      padding: 80px 0;
    }

    @media (max-width: 768px) {
      section {
        padding: 60px 0;
      }
      .container {
        padding: 0 16px;
      }
    }

    /* ----- 导航栏 毛玻璃固定顶部 ----- */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 64px;
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      box-shadow: 0 2px 12px rgba(45,27,78,0.04);
      z-index: 100;
      display: flex;
      align-items: center;
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 1.25rem;
      color: var(--primary-deep);
      letter-spacing: 0.5px;
    }

    .logo i {
      color: var(--accent-gold);
      font-size: 1.8rem;
    }

    .nav-links {
      display: flex;
      gap: 2rem;
      align-items: center;
      list-style: none;
    }

    .nav-links a {
      font-weight: 500;
      font-size: 0.95rem;
      color: var(--text-secondary);
      transition: color 0.2s;
      position: relative;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary-deep);
    }

    .nav-links a.active::after {
      content: '';
      position: absolute;
      bottom: -6px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent-gold);
      border-radius: 2px;
    }

    /* 移动端底部胶囊导航 */
    .mobile-nav {
      display: none;
    }

    @media (max-width: 768px) {
      .desktop-nav {
        display: none;
      }
      .mobile-nav {
        display: flex;
        position: fixed;
        bottom: 16px;
        left: 50%;
        transform: translateX(-50%);
        background: rgba(255,255,255,0.92);
        backdrop-filter: blur(20px);
        border-radius: 40px;
        padding: 8px 20px;
        box-shadow: 0 8px 28px rgba(0,0,0,0.08);
        z-index: 110;
        gap: 24px;
      }
      .mobile-nav a {
        display: flex;
        flex-direction: column;
        align-items: center;
        font-size: 0.7rem;
        color: var(--text-muted);
        transition: 0.2s;
      }
      .mobile-nav a i {
        font-size: 1.2rem;
        margin-bottom: 2px;
      }
      .mobile-nav a.active {
        color: var(--accent-gold);
      }
      .site-header {
        height: 60px;
      }
    }

    /* ----- Hero 双栏杂志分栏 ----- */
    .hero {
      padding-top: 120px;
      padding-bottom: 80px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .hero-left h1 {
      font-size: 3.5rem;
      font-weight: 700;
      line-height: 1.2;
      color: var(--primary-deep);
      margin-bottom: 20px;
      font-family: var(--font-display);
    }

    .hero-left .subtitle {
      font-size: 1.1rem;
      color: var(--text-secondary);
      margin-bottom: 32px;
      max-width: 90%;
    }

    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, #D4AF37 0%, #B8922E 100%);
      color: #1A1030;
      font-weight: 600;
      padding: 14px 36px;
      border-radius: var(--radius-full);
      transition: all 0.3s;
      box-shadow: 0 6px 18px rgba(212,175,55,0.25);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 14px 32px rgba(212,175,55,0.4);
    }

    .btn-outline {
      border: 1.5px solid var(--primary-deep);
      color: var(--primary-deep);
      background: transparent;
      padding: 14px 32px;
      border-radius: var(--radius-full);
      font-weight: 600;
      transition: 0.3s;
    }

    .btn-outline:hover {
      background: #EDE9F9;
    }

    .hero-right {
      position: relative;
    }

    .hero-img {
      border-radius: 32px;
      overflow: hidden;
      box-shadow: var(--shadow-hover);
      position: relative;
    }

    .hero-img img {
      width: 100%;
      object-fit: cover;
    }

    .hero-img::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(45,27,78,0.1) 0%, rgba(28,61,92,0.2) 100%);
    }

    @media (max-width: 768px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .hero-left h1 {
        font-size: 2.2rem;
      }
      .hero-right {
        order: -1;
      }
      .hero-img {
        border-radius: 24px;
      }
      .hero {
        padding-top: 90px;
      }
    }

    /* ----- 亮点网格 数据徽章 ----- */
    .badge-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
      gap: 24px;
    }

    .badge-item {
      background: var(--card-white);
      border-radius: var(--radius-lg);
      padding: 28px 16px;
      text-align: center;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }

    .badge-item:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }

    .badge-icon {
      font-size: 2rem;
      color: var(--accent-gold);
      margin-bottom: 12px;
    }

    .badge-number {
      font-size: 2.5rem;
      font-weight: 700;
      background: linear-gradient(135deg, #2D1B4E 0%, #4A3A7A 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      font-family: var(--font-display);
    }

    .badge-label {
      color: var(--text-muted);
      font-size: 0.9rem;
      margin-top: 4px;
    }

    /* ----- 核心优势 左文右图交替 ----- */
    .advantage-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
      margin-bottom: 80px;
    }

    .advantage-row:last-child {
      margin-bottom: 0;
    }

    .adv-text h2 {
      font-size: 2.25rem;
      font-weight: 600;
      color: var(--primary-deep);
      margin-bottom: 20px;
    }

    .adv-text p {
      color: var(--text-secondary);
      margin-bottom: 20px;
    }

    .adv-image img {
      border-radius: 24px;
      box-shadow: var(--shadow-card);
    }

    @media (max-width: 768px) {
      .advantage-row {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .adv-image {
        order: -1;
      }
    }

    /* ----- 案例瀑布流三列不等高 ----- */
    .cases-masonry {
      columns: 3;
      column-gap: 24px;
    }

    .case-card {
      break-inside: avoid;
      background: var(--card-white);
      border-radius: 24px;
      overflow: hidden;
      margin-bottom: 24px;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      cursor: pointer;
    }

    .case-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-hover);
    }

    .case-card img {
      width: 100%;
      transition: transform 0.4s;
    }

    .case-card:hover img {
      transform: scale(1.03);
    }

    .case-info {
      padding: 20px;
    }

    .case-info h3 {
      font-size: 1.25rem;
      font-weight: 600;
      margin-bottom: 8px;
    }

    @media (max-width: 768px) {
      .cases-masonry {
        columns: 2;
      }
    }
    @media (max-width: 520px) {
      .cases-masonry {
        columns: 1;
      }
    }

    /* ----- 方案对比表 ----- */
    .compare-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }

    .compare-col {
      background: var(--card-white);
      border-radius: 24px;
      padding: 32px;
      box-shadow: var(--shadow-card);
    }

    .compare-col.traditional {
      background: #F2F0F7;
      color: #4B4860;
    }

    .compare-col.galaxy {
      background: #FFFFFF;
      border: 1px solid #D4AF37;
      box-shadow: 0 8px 30px rgba(212,175,55,0.12);
    }

    .compare-title {
      font-size: 1.5rem;
      font-weight: 700;
      margin-bottom: 24px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .compare-list {
      list-style: none;
    }

    .compare-list li {
      padding: 10px 0;
      border-bottom: 1px solid var(--border-light);
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .galaxy .compare-list li i {
      color: var(--accent-gold);
    }

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

    /* ----- FAQ 手风琴 ----- */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }

    .faq-item {
      background: #F9F7FD;
      border-radius: 16px;
      padding: 16px 20px;
      transition: 0.2s;
    }

    .faq-question {
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      color: var(--text-secondary);
      font-size: 0.95rem;
    }

    .faq-item.open .faq-answer {
      max-height: 200px;
      margin-top: 12px;
    }

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

    /* ----- CTA 横幅 ----- */
    .cta-banner {
      background: linear-gradient(135deg, #2D1B4E 0%, #4A3A7A 100%);
      border-radius: 32px;
      padding: 64px 40px;
      text-align: center;
      color: white;
    }

    .cta-banner h2 {
      font-size: 2.25rem;
      margin-bottom: 16px;
    }

    .cta-banner p {
      color: #E4D9FF;
      margin-bottom: 32px;
    }

    /* ----- 页脚 ----- */
    .site-footer {
      background: var(--footer-dark);
      color: #CBC3E0;
      padding: 60px 0 30px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }

    .footer-logo {
      font-size: 1.5rem;
      font-weight: 700;
      color: white;
      margin-bottom: 12px;
    }

    .footer-links a {
      display: block;
      color: #B5AEC9;
      margin-bottom: 8px;
      transition: 0.2s;
    }

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

    .copyright {
      margin-top: 40px;
      text-align: center;
      color: #8A82A0;
    }

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