/* roulang page: index */
:root {
      --primary-darkred: #B31B1B;
      --primary-deepred: #8B0000;
      --accent-gold: #D4AF37;
      --bg-deep: #0D0D0D;
      --bg-card-deep: #141414;
      --bg-light: #F5F5F0;
      --bg-footer: #EBEBE5;
      --text-light: #E0E0E0;
      --text-dim: #B0B0B0;
      --text-dark: #1A1A1A;
      --text-white: #FFFFFF;
      --border-deep: #2A2A2A;
      --border-light: #D1D1D1;
      --shadow-gold: 0 4px 24px rgba(179, 27, 27, 0.15);
      --shadow-light: 0 2px 8px rgba(0,0,0,0.06);
      --radius-card: 8px;
      --radius-btn: 4px;
      --font-sans: 'Noto Sans SC', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
      --font-serif: 'Noto Serif SC', 'Times New Roman', serif;
      --font-mono: 'Roboto Mono', 'Courier New', monospace;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-deep);
      color: var(--text-light);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
    }

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

    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s ease;
    }

    button, .btn {
      cursor: pointer;
      font-family: inherit;
    }

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

    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(13, 13, 13, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(179, 27, 27, 0.5);
      z-index: 1000;
      padding: 12px 0;
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 22px;
      letter-spacing: 2px;
      color: var(--text-white);
      background: linear-gradient(135deg, #FFFFFF 0%, #D4AF37 80%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .logo-icon {
      width: 32px;
      height: 32px;
      background: var(--accent-gold);
      clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
      background: linear-gradient(135deg, #D4AF37, #B31B1B);
    }

    .nav-menu {
      display: flex;
      gap: 32px;
      align-items: center;
    }

    .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-dim);
      position: relative;
      padding: 5px 0;
      transition: color 0.2s;
    }

    .nav-link::after {
      content: "";
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent-gold);
      transition: width 0.25s ease;
    }

    .nav-link:hover {
      color: var(--accent-gold);
    }

    .nav-link:hover::after {
      width: 100%;
    }

    .btn-primary {
      background: var(--primary-darkred);
      color: white;
      border: none;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 15px;
      transition: background 0.2s, transform 0.1s;
      display: inline-block;
      text-align: center;
    }

    .btn-primary:hover {
      background: var(--primary-deepred);
      transform: translateY(-1px);
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--accent-gold);
      color: var(--accent-gold);
      padding: 10px 26px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: all 0.2s;
    }

    .btn-outline:hover {
      background: var(--accent-gold);
      color: var(--bg-deep);
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: none;
      border: none;
    }

    .hamburger span {
      width: 26px;
      height: 2px;
      background: var(--text-light);
      transition: 0.3s;
    }

    .mobile-drawer {
      position: fixed;
      top: 0;
      right: -100%;
      width: 75%;
      max-width: 320px;
      height: 100vh;
      background: rgba(10, 10, 10, 0.97);
      backdrop-filter: blur(20px);
      z-index: 1100;
      padding: 28px 24px;
      display: flex;
      flex-direction: column;
      gap: 32px;
      transition: right 0.35s ease;
      box-shadow: -8px 0 24px rgba(0,0,0,0.5);
    }

    .mobile-drawer.open {
      right: 0;
    }

    .drawer-link {
      font-size: 20px;
      font-weight: 600;
      color: #ccc;
      padding-left: 12px;
      border-left: 4px solid var(--accent-gold);
    }

    .overlay {
      position: fixed;
      inset: 0;
      background: rgba(0,0,0,0.7);
      z-index: 1050;
      display: none;
    }

    .overlay.show {
      display: block;
    }

    /* Hero */
    .hero {
      position: relative;
      min-height: 90vh;
      display: flex;
      align-items: center;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      background-blend-mode: overlay;
      margin-top: 70px;
    }

    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(179,27,27,0.75) 0%, rgba(13,13,13,0.92) 70%);
      z-index: 1;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 800px;
      padding: 0 24px;
    }

    .hero h1 {
      font-size: clamp(44px, 8vw, 64px);
      font-weight: 900;
      color: white;
      letter-spacing: -0.02em;
      line-height: 1.2;
      margin-bottom: 24px;
      border-left: 6px solid var(--accent-gold);
      padding-left: 24px;
    }

    .hero-sub {
      font-size: 20px;
      color: #B0B0B0;
      margin-bottom: 36px;
      max-width: 600px;
    }

    .hero-actions {
      display: flex;
      gap: 18px;
      flex-wrap: wrap;
    }

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

    .section-light {
      background: var(--bg-light);
      color: var(--text-dark);
    }

    .section-title {
      font-size: 36px;
      font-weight: 800;
      margin-bottom: 16px;
      letter-spacing: -0.01em;
    }

    .section-sub {
      color: var(--text-dim);
      margin-bottom: 48px;
      font-size: 18px;
    }

    /* 核心优势 非对称布局 */
    .advantage-grid {
      display: flex;
      flex-direction: column;
      gap: 40px;
    }

    .adv-item {
      display: flex;
      gap: 32px;
      align-items: flex-start;
      background: rgba(255,255,255,0.03);
      border: 1px solid rgba(212,175,55,0.15);
      border-radius: var(--radius-card);
      padding: 32px;
      transition: all 0.25s;
    }

    .adv-item:hover {
      border-color: var(--accent-gold);
      box-shadow: var(--shadow-gold);
    }

    .adv-icon {
      font-size: 44px;
      color: var(--accent-gold);
    }

    .adv-text h3 {
      font-size: 24px;
      color: var(--accent-gold);
      margin-bottom: 12px;
    }

    /* 场景卡片 */
    .scene-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 24px;
    }

    .scene-card {
      background: #141414;
      border-radius: var(--radius-card);
      overflow: hidden;
      border: 1px solid #2A2A2A;
    }

    .scene-img {
      height: 200px;
      background-size: cover;
      background-position: center;
      position: relative;
    }

    .scene-img::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(0deg, rgba(13,13,13,0.9) 0%, transparent 60%);
    }

    .scene-info {
      padding: 20px;
    }

    .badge {
      background: var(--primary-darkred);
      color: white;
      font-size: 13px;
      padding: 4px 12px;
      border-radius: 20px;
      display: inline-block;
      margin-bottom: 12px;
    }

    /* 案例 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 24px;
    }

    .case-card {
      background: #141414;
      padding: 32px;
      border-radius: var(--radius-card);
      text-align: center;
    }

    .case-number {
      font-size: 38px;
      font-weight: 800;
      color: var(--accent-gold);
    }

    /* 价格 */
    .price-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 24px;
    }

    .price-card {
      background: #141414;
      border-radius: var(--radius-card);
      padding: 36px 24px;
      border: 1px solid #2A2A2A;
      text-align: center;
      transition: 0.2s;
    }

    .price-card.recommend {
      border-color: var(--accent-gold);
      box-shadow: 0 0 24px rgba(212,175,55,0.2);
      position: relative;
    }

    .price-amount {
      font-size: 44px;
      font-weight: 800;
      color: var(--accent-gold);
    }

    .faq-item {
      border-bottom: 1px solid #D1D1D1;
      padding: 16px 0;
    }

    .faq-question {
      font-weight: 700;
      font-size: 18px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
    }

    .cta-global {
      background: #0D0D0D;
      text-align: center;
      padding: 100px 0;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
      padding: 60px 0 30px;
    }

    @media (max-width: 1023px) {
      .scene-grid, .case-grid, .price-grid {
        grid-template-columns: repeat(2,1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 767px) {
      .nav-menu { display: none; }
      .hamburger { display: flex; }
      .hero h1 { font-size: 38px; }
      .adv-item { flex-direction: column; }
      .scene-grid, .case-grid, .price-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .section { padding: 70px 0; }
    }