/* roulang page: index */
:root {
      --primary-gold: #D4AF37;
      --primary-gold-deep: #b8960c;
      --secondary-dark: #1A1A2E;
      --accent-red: #C41E3A;
      --bg-warm: #F8F6F0;
      --card-bg: #FFFFFF;
      --card-border: #E8E4D9;
      --text-heading: #1A1A2E;
      --text-body: #3D3A35;
      --text-muted: #8C887D;
      --text-white: #FFFFFF;
      --radius-card: 16px;
      --radius-small: 10px;
      --radius-btn: 50px;
      --shadow-card: 0 4px 20px rgba(26,26,46,0.06);
      --shadow-hover: 0 12px 32px rgba(26,26,46,0.12);
      --shadow-badge: 0 2px 8px rgba(196,30,58,0.25);
      --transition-smooth: all 0.25s ease;
      --container-max: 1280px;
      --section-gap: 120px;
      --card-padding: 28px;
      --grid-gap: 24px;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      background-color: var(--bg-warm);
      color: var(--text-body);
      line-height: 1.75;
      font-size: 1rem;
      -webkit-font-smoothing: antialiased;
    }
    h1, h2, h3, .serif-title {
      font-family: 'Noto Serif SC', serif;
      color: var(--text-heading);
      font-weight: 600;
    }
    h1 {
      font-size: 3.5rem;
      line-height: 1.2;
      font-weight: 700;
    }
    h2 {
      font-size: 2.25rem;
      line-height: 1.3;
      margin-bottom: 1rem;
    }
    h3 {
      font-size: 1.5rem;
      line-height: 1.4;
      font-weight: 600;
    }
    a {
      color: inherit;
      text-decoration: none;
    }
    img {
      max-width: 100%;
      display: block;
    }
    button, .btn {
      cursor: pointer;
      font-family: inherit;
      transition: var(--transition-smooth);
    }
    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 20px;
    }
    /* 导航系统 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(248,246,240,0.92);
      backdrop-filter: blur(12px);
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
      transition: all 0.3s ease;
    }
    .header-brand-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 20px;
      border-bottom: 1px solid rgba(212,175,55,0.15);
      max-width: var(--container-max);
      margin: 0 auto;
    }
    .logo {
      font-family: 'Noto Serif SC', serif;
      font-weight: 700;
      font-size: 1.8rem;
      background: linear-gradient(135deg, #D4AF37 0%, #f5e07a 80%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: 1px;
    }
    .search-tag-area {
      display: flex;
      align-items: center;
      gap: 18px;
    }
    .search-icon {
      font-size: 1.3rem;
      color: var(--secondary-dark);
      cursor: pointer;
    }
    .hot-tags {
      display: flex;
      gap: 10px;
    }
    .hot-tag {
      background: var(--accent-red);
      color: white;
      font-size: 0.75rem;
      font-weight: 600;
      padding: 4px 12px;
      border-radius: 50px;
      letter-spacing: 0.5px;
    }
    .nav-channels {
      display: flex;
      justify-content: center;
      gap: 2.5rem;
      padding: 0.75rem 20px;
      max-width: var(--container-max);
      margin: 0 auto;
      flex-wrap: wrap;
    }
    .nav-channel {
      font-weight: 500;
      color: var(--text-body);
      position: relative;
      padding-bottom: 4px;
      transition: color 0.2s;
    }
    .nav-channel.active {
      color: var(--primary-gold);
    }
    .nav-channel.active::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 100%;
      height: 3px;
      background: var(--primary-gold);
      border-radius: 2px;
    }
    .hamburger {
      display: none;
      font-size: 1.6rem;
      cursor: pointer;
      color: var(--secondary-dark);
    }
    .mobile-menu {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: var(--bg-warm);
      z-index: 999;
      flex-direction: column;
      padding: 2rem;
      gap: 1.8rem;
      transform: translateX(-100%);
      transition: transform 0.3s ease;
    }
    .mobile-menu.open {
      transform: translateX(0);
    }
    /* Hero */
    .hero {
      padding: 160px 0 100px;
      display: flex;
      align-items: center;
      gap: 3rem;
    }
    .hero-left {
      flex: 1 1 50%;
    }
    .hero-right {
      flex: 1 1 50%;
      position: relative;
    }
    .hero-image-card {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: 24px;
      height: 460px;
      position: relative;
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(212,175,55,0.25) 0%, transparent 70%);
    }
    .hero-glow {
      position: absolute;
      bottom: 20px;
      right: 20px;
      width: 120px;
      height: 120px;
      background: radial-gradient(circle, rgba(212,175,55,0.5) 0%, transparent 70%);
      filter: blur(20px);
    }
    .hero-title {
      margin-bottom: 1.2rem;
    }
    .hero-sub {
      font-size: 1.1rem;
      color: var(--text-muted);
      margin-bottom: 2rem;
      max-width: 90%;
    }
    .hero-actions {
      display: flex;
      gap: 1rem;
      margin-bottom: 2.5rem;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--primary-gold);
      color: white;
      border: none;
      padding: 0.85rem 2.5rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 1rem;
      box-shadow: 0 4px 12px rgba(212,175,55,0.3);
    }
    .btn-primary:hover {
      background: var(--primary-gold-deep);
      box-shadow: 0 8px 20px rgba(212,175,55,0.45);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary-gold);
      color: var(--primary-gold);
      padding: 0.85rem 2.5rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
    }
    .btn-outline:hover {
      background: var(--primary-gold);
      color: white;
    }
    .hero-badges {
      display: flex;
      gap: 2rem;
    }
    .badge-item {
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .badge-icon {
      font-size: 1.4rem;
    }
    .badge-number {
      font-weight: 700;
      font-size: 1.3rem;
      color: var(--secondary-dark);
    }
    .badge-label {
      color: var(--text-muted);
      font-size: 0.85rem;
    }
    /* 亮点网格 */
    .highlights {
      padding: var(--section-gap) 0;
    }
    .grid-2x3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: var(--grid-gap);
    }
    .highlight-card {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-card);
      padding: var(--card-padding);
      box-shadow: var(--shadow-card);
      transition: var(--transition-smooth);
    }
    .highlight-card:hover {
      border-color: var(--primary-gold);
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .icon-circle {
      width: 48px;
      height: 48px;
      background: rgba(212,175,55,0.12);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 1.2rem;
      color: var(--primary-gold);
      font-size: 1.5rem;
    }
    .highlight-badge {
      margin-top: 1rem;
    }
    .red-badge {
      background: var(--accent-red);
      color: white;
      padding: 4px 14px;
      border-radius: 30px;
      font-weight: 600;
      font-size: 0.8rem;
      display: inline-block;
    }
    /* 案例瀑布 */
    .cases {
      padding: var(--section-gap) 0;
    }
    .masonry {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: var(--grid-gap);
    }
    .case-card {
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: var(--transition-smooth);
      display: flex;
      flex-direction: column;
    }
    .case-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .case-img {
      height: 200px;
      background-size: cover;
      background-position: center;
    }
    .case-content {
      padding: 1.5rem;
    }
    .case-tags {
      color: var(--primary-gold);
      font-weight: 600;
      font-size: 0.8rem;
      margin-bottom: 0.5rem;
    }
    .case-title {
      font-weight: 700;
      margin-bottom: 0.5rem;
    }
    .case-excerpt {
      color: var(--text-muted);
      font-size: 0.9rem;
    }
    /* 方案对比 */
    .compare {
      padding: var(--section-gap) 0;
    }
    .table-scroll {
      overflow-x: auto;
      border-radius: 16px;
    }
    .compare-table {
      width: 100%;
      min-width: 700px;
      border-collapse: collapse;
      background: white;
    }
    .compare-table th, .compare-table td {
      padding: 1.2rem;
      text-align: center;
    }
    .recommend-col {
      background: rgba(212,175,55,0.08);
    }
    .gold-check {
      color: var(--primary-gold);
    }
    /* FAQ */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 2rem;
    }
    .faq-item {
      background: white;
      border-radius: 12px;
      padding: 1.2rem 1.5rem;
      box-shadow: var(--shadow-card);
      cursor: pointer;
    }
    .faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: 0.3s;
      color: var(--text-muted);
      margin-top: 0;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      margin-top: 1rem;
    }
    /* CTA横幅 */
    .cta-banner {
      background: linear-gradient(135deg, #1A1A2E 0%, #3a2c1a 100%);
      padding: 4rem 2rem;
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    .cta-title {
      color: white;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 2rem;
    }
    @media (max-width: 1024px) {
      h1 { font-size: 2.8rem; }
      .grid-2x3 { grid-template-columns: repeat(2,1fr); }
      .masonry { grid-template-columns: 1fr 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .nav-channels, .hot-tags { display: none; }
      .hamburger { display: block; }
      .hero { flex-direction: column; }
      .hero-right { order: -1; }
      .hero-image-card { height: 280px; }
      .grid-2x3 { grid-template-columns: 1fr; }
      .masonry { grid-template-columns: 1fr; }
      .faq-grid { grid-template-columns: 1fr; }
    }