/* roulang page: index */
:root {
      --deep-blue: #0B1A2F;
      --champagne: #C8A97E;
      --violet: #7B5CFC;
      --violet-dark: #6A4FDE;
      --warm-bg: #F5F3EF;
      --footer-bg: #EBE7E0;
      --text-dark: #2D2D2D;
      --text-warm: #6B625A;
      --white: #FFFFFF;
      --glass-bg: rgba(11, 26, 47, 0.65);
      --glass-border: rgba(200, 169, 126, 0.25);
      --card-shadow: 0 8px 32px rgba(11, 26, 47, 0.18), 0 2px 8px rgba(11, 26, 47, 0.08);
      --card-hover-shadow: 0 16px 48px rgba(11, 26, 47, 0.25);
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --transition: 0.25s ease-out;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Inter", system-ui, -apple-system, sans-serif;
      background-color: var(--warm-bg);
      color: var(--text-dark);
      line-height: 1.7;
      margin: 0;
      padding: 0;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 24px;
      padding-right: 24px;
    }

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

    a:hover {
      color: var(--violet);
    }

    h1, h2, h3 {
      font-weight: 700;
      letter-spacing: -0.02em;
      line-height: 1.2;
      color: var(--deep-blue);
    }

    h2 {
      display: flex;
      align-items: center;
      margin-bottom: 2rem;
    }

    h2::before {
      content: '';
      display: inline-block;
      width: 4px;
      height: 28px;
      background-color: var(--champagne);
      margin-right: 16px;
      border-radius: 2px;
    }

    /* 导航 */
    .main-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(11, 26, 47, 0.75);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border-bottom: 1px solid var(--glass-border);
      transition: background 0.3s;
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
      height: 70px;
    }

    .logo {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--champagne);
      letter-spacing: 0.5px;
      white-space: nowrap;
    }

    .nav-links {
      display: flex;
      gap: 2rem;
      list-style: none;
      margin: 0;
    }

    .nav-links a {
      color: #d1cfcd;
      font-weight: 500;
      position: relative;
      padding: 8px 0;
    }

    .nav-links a:hover {
      color: var(--violet);
    }

    .mega-trigger {
      position: relative;
    }

    .mega-button {
      background: transparent;
      border: 1px solid var(--champagne);
      color: var(--champagne);
      padding: 8px 18px;
      border-radius: 30px;
      font-weight: 500;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 6px;
      transition: 0.2s;
    }

    .mega-button:hover {
      background: rgba(200,169,126,0.15);
    }

    .mega-panel {
      position: absolute;
      right: 0;
      top: 60px;
      width: 480px;
      background: var(--glass-bg);
      backdrop-filter: blur(24px);
      -webkit-backdrop-filter: blur(24px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-lg);
      padding: 24px;
      display: none;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      box-shadow: var(--card-shadow);
    }

    .mega-trigger:focus-within .mega-panel,
    .mega-trigger:hover .mega-panel {
      display: grid;
    }

    .mega-card {
      background: rgba(255,255,255,0.08);
      border-radius: var(--radius-md);
      padding: 16px;
      color: white;
    }

    .mega-card h4 {
      color: var(--champagne);
      font-size: 1rem;
      margin-bottom: 4px;
    }

    /* Hero */
    .hero {
      background: linear-gradient(135deg, #0B1A2F 0%, #1a1f3a 100%);
      padding: 80px 0;
      position: relative;
      overflow: hidden;
    }

    .hero .container {
      display: flex;
      align-items: center;
      gap: 3rem;
    }

    .hero-left {
      flex: 55%;
      color: white;
    }

    .hero-left h1 {
      color: white;
      font-size: 3.2rem;
      margin-bottom: 1rem;
    }

    .hero-sub {
      font-size: 1.2rem;
      color: #ccc;
      margin-bottom: 2.5rem;
    }

    .btn-group {
      display: flex;
      gap: 1.2rem;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: var(--violet);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      border: none;
      box-shadow: 0 0 24px rgba(123,92,252,0.5);
      transition: 0.2s;
      display: inline-block;
    }

    .btn-primary:hover {
      background: var(--violet-dark);
      box-shadow: 0 0 36px rgba(123,92,252,0.7);
      transform: scale(1.04);
      color: white;
    }

    .btn-outline {
      border: 1px solid var(--champagne);
      color: var(--champagne);
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      background: transparent;
      transition: 0.2s;
    }

    .btn-outline:hover {
      background: rgba(200,169,126,0.15);
      color: var(--champagne);
    }

    .hero-right {
      flex: 45%;
      position: relative;
      min-height: 320px;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: var(--radius-lg);
      display: flex;
      align-items: flex-end;
      justify-content: flex-start;
      padding: 24px;
    }

    .float-card {
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-md);
      padding: 16px;
      color: white;
      margin-right: 12px;
    }

    /* 亮点网格 */
    .advantages {
      padding: 100px 0 80px;
    }

    .adv-grid {
      display: grid;
      grid-template-columns: 1fr 1fr 0.8fr;
      gap: 24px;
      margin-bottom: 2rem;
    }

    .adv-card {
      background: white;
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: 0 4px 20px rgba(0,0,0,0.04);
      transition: var(--transition);
    }

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

    .stat-badge {
      background: var(--deep-blue);
      color: white;
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .stat-number {
      font-size: 2.4rem;
      font-weight: 700;
      color: var(--champagne);
    }

    /* 案例瀑布 */
    .cases {
      padding: 80px 0;
    }

    .masonry {
      columns: 3;
      column-gap: 24px;
    }

    .case-card {
      break-inside: avoid;
      background: white;
      border-radius: var(--radius-lg);
      margin-bottom: 24px;
      overflow: hidden;
      box-shadow: 0 4px 16px rgba(0,0,0,0.05);
      transition: var(--transition);
    }

    .case-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--card-hover-shadow);
    }

    .case-img {
      height: 180px;
      background-size: cover;
      background-position: center;
    }

    .case-tag {
      color: var(--champagne);
      border: 1px solid var(--champagne);
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 0.8rem;
      display: inline-block;
      margin: 16px 16px 8px;
    }

    .case-card h3 {
      margin: 0 16px 8px;
      font-size: 1.2rem;
    }

    .case-card p {
      margin: 0 16px 20px;
      color: var(--text-warm);
    }

    /* 方案对比 */
    .compare {
      padding: 80px 0;
    }

    .compare-grid {
      display: flex;
      gap: 40px;
      align-items: center;
    }

    .compare-left {
      flex: 1;
    }

    .compare-right {
      flex: 1;
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      border-radius: var(--radius-lg);
      padding: 32px;
      border: 1px solid var(--glass-border);
    }

    .table-row {
      display: flex;
      justify-content: space-between;
      padding: 12px 0;
      border-bottom: 1px solid rgba(255,255,255,0.1);
      color: white;
    }

    /* FAQ */
    .faq {
      padding: 80px 0;
    }

    .faq-item {
      background: white;
      border-radius: var(--radius-md);
      margin-bottom: 12px;
      padding: 20px 24px;
      cursor: pointer;
    }

    .faq-question {
      display: flex;
      justify-content: space-between;
      font-weight: 600;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: 0.3s;
      color: var(--text-warm);
    }

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

    /* CTA横幅 */
    .cta-banner {
      background: var(--deep-blue);
      padding: 80px 0;
      text-align: center;
    }

    .cta-banner h2 {
      color: white;
      justify-content: center;
    }

    .trust-badges {
      display: flex;
      justify-content: center;
      gap: 40px;
      margin-top: 24px;
      color: var(--champagne);
    }

    /* 页脚 */
    .footer {
      background: var(--footer-bg);
      padding: 60px 0 20px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 30px;
    }

    .copyright {
      background: var(--deep-blue);
      color: white;
      text-align: center;
      padding: 16px;
      margin-top: 40px;
    }

    @media (max-width: 1024px) {
      .hero .container { flex-direction: column; }
      .masonry { columns: 2; }
      .compare-grid { flex-direction: column; }
    }

    @media (max-width: 640px) {
      .nav-links { display: none; }
      .masonry { columns: 1; }
      .adv-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
    }