/* roulang page: index */
:root {
      --deep-black: #0B0C0E;
      --card-bg: #1A1C23;
      --champagne-gold: #C8A96E;
      --gold-dim: rgba(200, 169, 110, 0.25);
      --text-primary: #E2E8F0;
      --text-secondary: #94A3B8;
      --text-muted: #64748B;
      --neon-green: #4ADE80;
      --border-subtle: rgba(200, 169, 110, 0.2);
      --radius-card: 24px;
      --radius-button: 50px;
      --shadow-gold: 0 8px 30px rgba(200, 169, 110, 0.25);
      --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      --container-max: 1280px;
      --section-gap: 120px;
    }
    
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    
    body {
      background-color: var(--deep-black);
      font-family: 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif;
      color: var(--text-primary);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
    }
    
    ::selection {
      background: var(--champagne-gold);
      color: var(--deep-black);
    }
    
    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 32px;
    }
    
    /* 沉浸式导航 */
    .nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(11, 12, 14, 0.7);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(200, 169, 110, 0.15);
      transition: var(--transition-smooth);
    }
    
    .nav.scrolled {
      background: #0B0C0E;
      box-shadow: 0 8px 20px rgba(0,0,0,0.7);
    }
    
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 76px;
    }
    
    .logo {
      font-family: 'Cinzel', 'Noto Serif SC', serif;
      font-size: 1.8rem;
      font-weight: 600;
      color: var(--champagne-gold);
      letter-spacing: 2px;
      text-decoration: none;
      display: flex;
      align-items: center;
      gap: 4px;
    }
    .logo i {
      font-size: 2rem;
      color: var(--champagne-gold);
    }
    
    .nav-links {
      display: flex;
      align-items: center;
      gap: 36px;
    }
    
    .nav-links a {
      text-decoration: none;
      color: var(--text-primary);
      font-weight: 500;
      font-size: 0.95rem;
      transition: var(--transition-smooth);
      position: relative;
    }
    
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -6px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--champagne-gold);
      transition: width 0.3s ease;
    }
    
    .nav-links a:hover {
      color: var(--champagne-gold);
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    
    .btn-nav-cta {
      background: var(--champagne-gold);
      color: var(--deep-black);
      padding: 12px 28px;
      border-radius: var(--radius-button);
      font-weight: 600;
      font-size: 0.95rem;
      letter-spacing: 0.5px;
      transition: var(--transition-smooth);
      border: none;
      cursor: pointer;
      text-decoration: none;
      display: inline-block;
    }
    
    .btn-nav-cta:hover {
      background: #fff;
      box-shadow: 0 0 20px rgba(200, 169, 110, 0.6);
      transform: scale(1.02);
    }
    
    .hamburger {
      display: none;
      font-size: 1.6rem;
      color: var(--champagne-gold);
      cursor: pointer;
    }
    
    /* 移动端底部导航 */
    .mobile-bottom-nav {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: #0B0C0E;
      border-top: 1px solid var(--border-subtle);
      backdrop-filter: blur(20px);
      justify-content: space-around;
      align-items: center;
      height: 68px;
      z-index: 999;
      padding: 0 10px;
    }
    .mobile-bottom-nav a {
      color: var(--text-secondary);
      text-decoration: none;
      font-size: 0.7rem;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 4px;
    }
    .mobile-bottom-nav i {
      font-size: 1.4rem;
    }
    .mobile-bottom-nav .center-cta {
      background: var(--champagne-gold);
      color: #0B0C0E;
      padding: 12px 24px;
      border-radius: 40px;
      font-weight: 700;
      margin-top: -25px;
      box-shadow: 0 6px 18px rgba(200,169,110,0.5);
    }
    
    /* Hero */
    .hero {
      position: relative;
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: radial-gradient(circle at 30% 40%, rgba(200,169,110,0.12) 0%, #0B0C0E 70%);
      overflow: hidden;
      padding-top: 80px;
    }
    
    .hero-bg-img {
      position: absolute;
      top: 0;
      right: 0;
      width: 55%;
      height: 100%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      opacity: 0.28;
      mask-image: linear-gradient(to left, rgba(0,0,0,1) 30%, transparent 90%);
      -webkit-mask-image: linear-gradient(to left, rgba(0,0,0,1) 30%, transparent 90%);
    }
    
    .hero-content {
      position: relative;
      z-index: 10;
      max-width: 700px;
    }
    
    .hero h1 {
      font-family: 'Cinzel', 'Noto Serif SC', serif;
      font-size: clamp(3.2rem, 8vw, 4.8rem);
      font-weight: 700;
      color: var(--champagne-gold);
      line-height: 1.2;
      margin-bottom: 24px;
      text-shadow: 0 4px 20px rgba(0,0,0,0.6);
    }
    
    .hero-sub {
      font-size: 1.25rem;
      color: #CBD5E1;
      margin-bottom: 48px;
      max-width: 550px;
      font-weight: 400;
    }
    
    .hero-buttons {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }
    
    .btn-primary {
      background: var(--champagne-gold);
      color: #0B0C0E;
      font-weight: 700;
      padding: 16px 40px;
      border-radius: var(--radius-button);
      text-decoration: none;
      letter-spacing: 0.5px;
      transition: var(--transition-smooth);
      border: none;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-primary:hover {
      background: #fff;
      box-shadow: 0 0 25px rgba(200,169,110,0.7);
      transform: translateY(-3px);
    }
    
    .btn-outline {
      background: transparent;
      border: 1px solid var(--champagne-gold);
      color: var(--champagne-gold);
      font-weight: 600;
      padding: 16px 38px;
      border-radius: var(--radius-button);
      text-decoration: none;
      transition: var(--transition-smooth);
    }
    .btn-outline:hover {
      background: rgba(200,169,110,0.1);
      border-color: #fff;
      color: #fff;
    }
    
    /* 通用板块 */
    section {
      padding: var(--section-gap) 0;
    }
    
    .section-title {
      font-family: 'Cinzel', 'Noto Serif SC', serif;
      font-size: 2.5rem;
      color: var(--champagne-gold);
      margin-bottom: 16px;
    }
    .section-desc {
      color: var(--text-secondary);
      font-size: 1.1rem;
      max-width: 600px;
      margin-bottom: 48px;
    }
    
    /* 优势卡片错落网格 */
    .advantages-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }
    .adv-card {
      background: var(--card-bg);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-card);
      padding: 40px 28px;
      transition: var(--transition-smooth);
      position: relative;
    }
    .adv-card:nth-child(1) {
      grid-row: span 2;
    }
    .adv-card:hover {
      border-color: var(--champagne-gold);
      transform: translateY(-8px);
      box-shadow: 0 20px 35px rgba(0,0,0,0.8);
    }
    .adv-icon {
      font-size: 2.4rem;
      color: var(--champagne-gold);
      margin-bottom: 20px;
    }
    .adv-card h3 {
      font-size: 1.5rem;
      margin-bottom: 12px;
    }
    
    /* 数据徽章 */
    .stats-wall {
      display: flex;
      justify-content: space-around;
      flex-wrap: wrap;
      gap: 30px;
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 50px 30px;
      border: 1px solid var(--border-subtle);
    }
    .stat-item {
      text-align: center;
    }
    .stat-number {
      font-size: 3.2rem;
      font-weight: 700;
      background: linear-gradient(180deg, #C8A96E 0%, #FFFFFF 80%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    
    /* 服务矩阵 */
    .service-row {
      display: flex;
      gap: 32px;
      margin-bottom: 32px;
      background: var(--card-bg);
      border-radius: var(--radius-card);
      overflow: hidden;
      border: 1px solid var(--border-subtle);
    }
    .service-img {
      width: 35%;
      background-size: cover;
      background-position: center;
      transition: transform 0.4s ease;
    }
    .service-row:hover .service-img {
      transform: scale(1.03);
    }
    .service-info {
      padding: 40px;
      flex: 1;
    }
    
    /* FAQ */
    .faq-item {
      border-bottom: 1px solid #2D2F36;
      padding: 24px 0;
      cursor: pointer;
    }
    .faq-question {
      font-weight: 600;
      font-size: 1.2rem;
      display: flex;
      justify-content: space-between;
      color: #E2E8F0;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      color: #94A3B8;
      padding-left: 12px;
      border-left: 2px solid var(--champagne-gold);
      margin-top: 8px;
    }
    .active-faq .faq-answer {
      max-height: 200px;
    }
    
    .cta-full {
      background: radial-gradient(circle at center, rgba(200,169,110,0.2) 0%, #0B0C0E 70%);
      text-align: center;
      padding: 100px 20px;
    }
    
    footer {
      background: #0B0C0E;
      border-top: 1px solid #1A1C23;
      padding: 60px 0 30px;
      color: #64748B;
    }
    
    @media (max-width: 1024px) {
      .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .service-row {
        flex-direction: column;
      }
      .service-img {
        width: 100%;
        height: 220px;
      }
    }
    
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: block; }
      .mobile-bottom-nav { display: flex; }
      .container { padding: 0 20px; }
      .hero-bg-img { width: 100%; opacity: 0.2; }
      .advantages-grid { grid-template-columns: 1fr; }
    }