/* roulang page: index */
:root {
      --primary-deep: #0B0C0E;
      --accent-gold: #D4AF37;
      --highlight-cyan: #00F0FF;
      --bg-warm: #F5F3EE;
      --dark-section: #121316;
      --card-bg: #FFFFFF;
      --border-light: #E8E4DD;
      --text-primary: #1A1A1A;
      --text-secondary: #555555;
      --text-muted: #999999;
      --font-title: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
      --font-body: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Inter', system-ui, sans-serif;
      --container-max: 1280px;
      --radius-card: 12px;
      --radius-btn: 6px;
      --shadow-sm: 0 2px 6px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
      --transition-base: all 0.25s ease;
    }

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

    body {
      font-family: var(--font-body);
      background-color: var(--bg-warm);
      color: var(--text-primary);
      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-base);
    }

    button, input {
      font-family: inherit;
    }

    .container {
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 导航 */
    .nav {
      position: sticky;
      top: 0;
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid transparent;
      z-index: 50;
      transition: border-color 0.3s;
    }
    .nav.scrolled {
      border-bottom-color: var(--border-light);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.6rem;
      color: var(--primary-deep);
      letter-spacing: 1px;
    }
    .logo-icon {
      width: 34px;
      height: 34px;
      background: linear-gradient(135deg, var(--accent-gold) 0%, #f5e07a 100%);
      mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor"><path d="M13 2L3 14h6l-2 8 10-12h-6l2-8z"/></svg>') center/cover no-repeat;
      -webkit-mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor"><path d="M13 2L3 14h6l-2 8 10-12h-6l2-8z"/></svg>') center/cover no-repeat;
      background-color: var(--accent-gold);
    }
    .nav-links {
      display: flex;
      gap: 2.5rem;
      font-weight: 500;
      color: var(--text-secondary);
    }
    .nav-links a {
      position: relative;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -6px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--highlight-cyan);
      transition: width 0.25s ease;
    }
    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }
    .nav-cta {
      background: var(--accent-gold);
      color: var(--primary-deep);
      font-weight: 600;
      padding: 0.7rem 1.8rem;
      border-radius: var(--radius-btn);
      font-size: 0.95rem;
      transition: all 0.25s;
      border: none;
      cursor: pointer;
      letter-spacing: 0.5px;
    }
    .nav-cta:hover {
      background: #e5c65a;
      transform: translateY(-2px);
      box-shadow: 0 8px 16px rgba(212,175,55,0.25);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: transparent;
      border: none;
      cursor: pointer;
    }
    .hamburger span {
      width: 26px;
      height: 2.5px;
      background: var(--primary-deep);
      border-radius: 4px;
      transition: 0.3s;
    }
    .mobile-menu {
      display: none;
      position: fixed;
      top: 72px;
      left: 0;
      width: 100%;
      background: rgba(255,255,255,0.98);
      backdrop-filter: blur(16px);
      flex-direction: column;
      padding: 2rem;
      gap: 1.8rem;
      border-bottom: 1px solid var(--border-light);
      z-index: 40;
      opacity: 0;
      transform: translateY(-10px);
      transition: 0.25s ease;
    }
    .mobile-menu.open {
      display: flex;
      opacity: 1;
      transform: translateY(0);
    }
    .mobile-menu a {
      font-size: 1.3rem;
      font-weight: 600;
      color: var(--primary-deep);
    }

    /* 板块间距 */
    section {
      padding: 90px 0;
    }

    /* Hero */
    .hero {
      min-height: 85vh;
      display: flex;
      align-items: center;
      background: linear-gradient(135deg, #f5f3ee 0%, #ffffff 100%);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      align-items: center;
    }
    .hero-content h1 {
      font-family: var(--font-title);
      font-size: 3.2rem;
      font-weight: 700;
      line-height: 1.2;
      color: var(--primary-deep);
      margin-bottom: 1.5rem;
    }
    .hero-content .highlight {
      color: var(--accent-gold);
      border-bottom: 3px solid var(--highlight-cyan);
    }
    .hero-sub {
      font-size: 1.15rem;
      color: var(--text-secondary);
      margin-bottom: 2.2rem;
      max-width: 85%;
    }
    .btn-group {
      display: flex;
      gap: 1.2rem;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--accent-gold);
      color: #0B0C0E;
      font-weight: 700;
      padding: 0.9rem 2.4rem;
      border-radius: var(--radius-btn);
      border: none;
      cursor: pointer;
      transition: 0.2s;
      font-size: 1rem;
      letter-spacing: 0.3px;
    }
    .btn-primary:hover {
      background: #e5c65a;
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--highlight-cyan);
      color: var(--primary-deep);
      font-weight: 600;
      padding: 0.9rem 2.4rem;
      border-radius: var(--radius-btn);
      cursor: pointer;
      transition: 0.2s;
    }
    .btn-outline:hover {
      background: rgba(0,240,255,0.08);
    }
    .hero-visual {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      height: 420px;
      border-radius: 28px;
      box-shadow: 0 25px 40px -15px rgba(0,0,0,0.2);
      position: relative;
      overflow: hidden;
    }

    /* 亮点网格 */
    .highlights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .highlight-card {
      background: var(--card-bg);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      padding: 2rem 1.8rem;
      transition: all 0.3s;
    }
    .highlight-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
    }
    .icon-circle {
      width: 48px;
      height: 48px;
      background: rgba(0,240,255,0.1);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 1.5rem;
      color: var(--highlight-cyan);
      font-size: 1.5rem;
    }

    /* 瀑布流 */
    .waterfall {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }
    .left-col, .right-col {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    .event-card {
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: 0.25s;
    }
    .event-card:hover {
      box-shadow: var(--shadow-md);
    }
    .event-img {
      height: 200px;
      background-size: cover;
      background-position: center;
    }
    .event-info {
      padding: 1.2rem;
    }

    /* 方案对比 */
    .compare-row {
      display: flex;
      gap: 2rem;
      align-items: center;
      justify-content: center;
    }
    .compare-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 2.2rem;
      flex: 1;
      border: 1px solid var(--border-light);
    }
    .vs-badge {
      font-weight: 800;
      font-size: 1.8rem;
      color: var(--accent-gold);
    }

    /* 数据条 */
    .stats-bar {
      display: flex;
      justify-content: space-around;
      background: var(--dark-section);
      color: white;
      border-radius: 24px;
      padding: 2.5rem;
    }

    /* FAQ */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    .faq-item {
      background: white;
      border-radius: 12px;
      padding: 1.5rem;
      border: 1px solid var(--border-light);
    }

    /* CTA */
    .cta-full {
      background: var(--dark-section);
      color: white;
      padding: 4rem 0;
      text-align: center;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 2rem;
    }

    @media (max-width: 1024px) {
      .highlights-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .nav-links, .nav-cta { display: none; }
      .hamburger { display: flex; }
      .hero-grid { grid-template-columns: 1fr; }
      .waterfall { grid-template-columns: 1fr; }
      .faq-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .compare-row { flex-direction: column; }
    }