/* roulang page: index */
:root {
      --deep-purple: #0B0710;
      --burgundy: #800020;
      --champagne: #C9A96E;
      --dark-purple-gray: #1A1520;
      --warm-offwhite: #F5F0EB;
      --soft-pink-glow: #E8D5D0;
      --border-subtle: #2A222F;
      --text-light: #F5F0EB;
      --text-muted: #B5ACB0;
      --text-body: #3A2F3A;
      --radius-card: 12px;
      --radius-btn: 40px;
      --transition-smooth: all 0.3s ease;
      --font-serif: 'Noto Serif SC', 'Source Han Serif SC', Georgia, serif;
      --font-sans: 'Noto Sans SC', 'Inter', -apple-system, sans-serif;
      --container-max: 1280px;
      --nav-height: 68px;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--warm-offwhite);
      color: var(--text-body);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

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

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

    /* 容器 */
    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
      width: 100%;
    }

    /* 导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: var(--nav-height);
      background-color: rgba(245, 240, 235, 0.98);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid #E0D8D0;
      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: 10px;
      font-family: var(--font-serif);
      font-size: 22px;
      font-weight: 700;
      color: var(--burgundy);
      letter-spacing: -0.3px;
    }

    .logo-icon {
      width: 28px;
      height: 28px;
      background: radial-gradient(circle, rgba(201,169,110,0.7) 0%, rgba(128,0,32,0.3) 80%);
      border-radius: 50%;
      box-shadow: 0 0 12px rgba(201,169,110,0.5);
      display: inline-block;
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 28px;
    }

    .main-nav a {
      font-size: 15px;
      font-weight: 500;
      color: #3A2F3A;
      padding: 4px 0;
      border-bottom: 2px solid transparent;
    }

    .main-nav a:hover,
    .main-nav a.active {
      color: var(--burgundy);
      border-bottom-color: var(--champagne);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .search-box {
      background: rgba(26,21,32,0.06);
      border-radius: 40px;
      padding: 10px 18px;
      display: flex;
      align-items: center;
      gap: 6px;
      color: #3A2F3A;
      font-size: 14px;
    }

    .btn {
      display: inline-block;
      font-weight: 600;
      text-align: center;
      cursor: pointer;
      border: none;
      transition: var(--transition-smooth);
      font-family: var(--font-sans);
    }

    .btn-primary {
      background: var(--burgundy);
      color: white;
      border-radius: var(--radius-btn);
      padding: 12px 28px;
      font-size: 15px;
      letter-spacing: 0.3px;
      box-shadow: 0 4px 10px rgba(128,0,32,0.25);
    }

    .btn-primary:hover {
      background: #660018;
      transform: scale(1.03);
      box-shadow: 0 8px 18px rgba(128,0,32,0.35);
    }

    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--champagne);
      color: var(--champagne);
      border-radius: var(--radius-btn);
      padding: 12px 28px;
      font-size: 15px;
    }

    .btn-outline:hover {
      background: rgba(201,169,110,0.1);
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: none;
      border: none;
    }
    .hamburger span {
      width: 24px;
      height: 2px;
      background: #3A2F3A;
      transition: 0.3s;
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: radial-gradient(circle at 85% 20%, rgba(232,213,208,0.18) 0%, #0B0710 70%);
      background-color: var(--deep-purple);
      position: relative;
      overflow: hidden;
    }

    .hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.35;
      mix-blend-mode: overlay;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 720px;
      color: white;
      padding: 120px 0 80px;
    }

    .hero-tag {
      display: inline-block;
      font-size: 13px;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--champagne);
      background: rgba(201,169,110,0.12);
      padding: 6px 18px;
      border-radius: 30px;
      margin-bottom: 24px;
    }

    .hero h1 {
      font-family: var(--font-serif);
      font-size: 52px;
      font-weight: 700;
      line-height: 1.15;
      letter-spacing: -0.02em;
      margin-bottom: 20px;
    }

    .hero-sub {
      font-size: 18px;
      font-weight: 300;
      color: #F5F0EB;
      max-width: 520px;
      margin-bottom: 36px;
    }

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

    .scroll-indicator {
      position: absolute;
      bottom: 30px;
      left: 50%;
      transform: translateX(-50%);
      color: var(--champagne);
      font-size: 24px;
      animation: pulse 2s infinite;
    }
    @keyframes pulse { 0%{opacity:0.4; transform:translateX(-50%) translateY(0);} 50%{opacity:1; transform:translateX(-50%) translateY(6px);} 100%{opacity:0.4; transform:translateX(-50%) translateY(0);} }

    /* 板块通用 */
    section {
      padding: 100px 0;
    }

    .section-title {
      font-family: var(--font-serif);
      font-size: 36px;
      font-weight: 600;
      line-height: 1.25;
      margin-bottom: 16px;
      color: var(--deep-purple);
    }

    .section-sub {
      font-size: 16px;
      color: #5A4E5A;
      max-width: 680px;
      margin-bottom: 48px;
    }

    .bg-dark {
      background-color: var(--dark-purple-gray);
      color: var(--text-light);
    }
    .bg-dark .section-title { color: white; }
    .bg-dark .section-sub { color: #C2B7C0; }

    .bg-warm {
      background-color: var(--warm-offwhite);
    }

    /* 数据看板 */
    .dashboard-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 28px;
      text-align: center;
    }

    .stat-item {
      padding: 28px 16px;
      border-right: 1px solid rgba(201,169,110,0.2);
    }
    .stat-item:last-child { border-right: none; }
    .stat-number {
      font-family: var(--font-serif);
      font-size: 42px;
      font-weight: 700;
      color: var(--burgundy);
      margin-bottom: 8px;
    }
    .stat-label {
      font-size: 14px;
      color: #F5F0EB;
      letter-spacing: 0.5px;
    }
    .stat-divider {
      width: 40px;
      height: 1px;
      background: var(--champagne);
      margin: 10px auto;
    }

    /* 服务矩阵 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: var(--dark-purple-gray);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-card);
      padding: 28px;
      transition: var(--transition-smooth);
      color: var(--text-light);
      display: flex;
      flex-direction: column;
    }

    .service-card:hover {
      border-color: var(--champagne);
      transform: translateY(-4px);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      margin-bottom: 20px;
      border: 1.5px solid var(--champagne);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--champagne);
    }

    .service-card h3 {
      font-size: 22px;
      font-weight: 600;
      margin-bottom: 12px;
    }

    .service-card p {
      font-size: 15px;
      color: #D1C9D0;
      flex: 1;
    }

    .text-link {
      color: var(--burgundy);
      font-weight: 500;
      display: inline-flex;
      align-items: center;
      gap: 4px;
      margin-top: 16px;
    }

    /* 对比 */
    .comparison-row {
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      gap: 24px;
      align-items: center;
    }

    .vs-badge {
      width: 60px;
      height: 60px;
      border: 2px solid var(--champagne);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--champagne);
      font-weight: 700;
    }

    .compare-col {
      background: rgba(26,21,32,0.6);
      border-radius: 18px;
      padding: 28px;
      backdrop-filter: blur(4px);
    }

    .highlight-col {
      border: 1.5px solid var(--burgundy);
      background: rgba(128,0,32,0.08);
    }

    .compare-item {
      display: flex;
      align-items: center;
      gap: 12px;
      margin: 18px 0;
    }

    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      border-bottom: 1px solid #DDD4CD;
      padding: 20px 0;
    }
    .faq-question {
      font-size: 18px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
      color: var(--deep-purple);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      color: #4A3F4A;
      padding-right: 20px;
    }
    .faq-item.open .faq-answer {
      max-height: 200px;
      padding-top: 12px;
    }

    /* CTA 横幅 */
    .cta-banner {
      background: var(--deep-purple);
      background-image: radial-gradient(ellipse at 30% 50%, rgba(201,169,110,0.08) 0%, transparent 70%);
      text-align: center;
      padding: 80px 0;
    }

    /* 页脚 */
    .site-footer {
      background: #1A1520;
      color: #C2B7C0;
      padding: 64px 0 32px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
    }
    .footer-logo {
      font-family: var(--font-serif);
      font-size: 24px;
      color: white;
    }
    .copyright {
      border-top: 1px solid #2A222F;
      margin-top: 40px;
      padding-top: 24px;
      font-size: 13px;
    }

    @media (max-width: 1024px) {
      .dashboard-grid { grid-template-columns: repeat(2, 1fr); }
      .services-grid { grid-template-columns: repeat(2, 1fr); }
      .comparison-row { grid-template-columns: 1fr; }
      .vs-badge { margin: 10px auto; }
    }

    @media (max-width: 768px) {
      .main-nav, .header-actions .search-box { display: none; }
      .hamburger { display: flex; }
      .hero h1 { font-size: 34px; }
      section { padding: 64px 0; }
      .services-grid, .dashboard-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .hero-content { padding-top: 100px; }
    }