/* roulang page: index */
:root {
      --primary-bg: #F0F4F8;
      --secondary-bg: #EAF0F6;
      --deep-blue: #2C3E50;
      --gold: #D4AF37;
      --gold-light: rgba(212, 175, 55, 0.12);
      --white: #FFFFFF;
      --text-primary: #2C3E50;
      --text-secondary: #5A6A7E;
      --text-muted: #8E9EAF;
      --border-light: #E8ECF1;
      --shadow-card: 0 10px 30px -10px rgba(0,0,0,0.05);
      --shadow-hover: 0 20px 35px -12px rgba(0,0,0,0.08);
      --radius-lg: 16px;
      --radius-xl: 50px;
      --radius-md: 12px;
      --transition: 0.3s ease;
      --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    }
    
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    
    body {
      font-family: var(--font-sans);
      background-color: var(--primary-bg);
      color: var(--text-secondary);
      line-height: 1.8;
      font-weight: 400;
      padding-top: 90px;
    }
    
    h1, h2, h3, h4 {
      color: var(--deep-blue);
      font-weight: 600;
    }
    
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    .section-padding {
      padding: 80px 0;
    }
    
    /* 浮动Dock导航 */
    .navbar-dock {
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border-radius: var(--radius-xl);
      box-shadow: 0 8px 24px rgba(0,0,0,0.04);
      padding: 0.7rem 1.8rem;
      margin: 16px auto;
      max-width: 1100px;
      width: 92%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      border: 1px solid rgba(255,255,255,0.6);
      transition: all 0.3s ease;
    }
    
    .navbar-dock.scrolled {
      background: rgba(255, 255, 255, 0.95);
      box-shadow: 0 10px 28px rgba(0,0,0,0.06);
    }
    
    .logo-text {
      font-weight: 700;
      font-size: 1.6rem;
      letter-spacing: 0.04em;
      color: var(--deep-blue);
      white-space: nowrap;
    }
    .logo-text span {
      color: var(--gold);
      font-weight: 700;
    }
    
    .nav-links {
      display: flex;
      gap: 2.2rem;
      align-items: center;
    }
    
    .nav-link-item {
      font-weight: 500;
      color: var(--text-secondary);
      font-size: 1rem;
      position: relative;
      padding: 0.2rem 0;
    }
    
    .nav-link-item:hover {
      color: var(--deep-blue);
    }
    
    .nav-link-item.active {
      color: var(--gold);
      font-weight: 600;
    }
    
    .btn-gold {
      background: var(--gold);
      border: none;
      color: white;
      font-weight: 600;
      padding: 0.6rem 1.9rem;
      border-radius: var(--radius-xl);
      letter-spacing: 0.03em;
      transition: var(--transition);
      font-size: 0.95rem;
      box-shadow: 0 6px 16px rgba(212,175,55,0.3);
    }
    
    .btn-gold:hover {
      background: #c9a42b;
      color: white;
      transform: translateY(-2px);
      box-shadow: 0 12px 22px rgba(212,175,55,0.4);
    }
    
    .btn-outline-deep {
      border: 1.5px solid var(--deep-blue);
      color: var(--deep-blue);
      background: transparent;
      font-weight: 600;
      padding: 0.6rem 1.9rem;
      border-radius: var(--radius-xl);
      transition: var(--transition);
    }
    
    .btn-outline-deep:hover {
      background: var(--deep-blue);
      color: white;
    }
    
    /* Hero区域 */
    .hero-section {
      background: linear-gradient(180deg, #F8FAFB 0%, #F0F4F8 100%);
      border-radius: 0 0 40px 40px;
      margin-bottom: 20px;
    }
    
    .hero-title {
      font-size: 3rem;
      font-weight: 700;
      letter-spacing: 0.05em;
      color: var(--deep-blue);
      line-height: 1.3;
    }
    
    .hero-sub {
      font-size: 1.15rem;
      color: var(--text-secondary);
      margin: 1.5rem 0 2rem;
    }
    
    .metric-card {
      background: var(--white);
      border-radius: var(--radius-lg);
      padding: 1.25rem 1.5rem;
      box-shadow: var(--shadow-card);
      border: 1px solid var(--border-light);
      text-align: center;
    }
    
    .metric-number {
      font-size: 2.3rem;
      font-weight: 700;
      color: var(--gold);
      line-height: 1.2;
    }
    
    .hero-img-bg {
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      border-radius: 28px;
      min-height: 280px;
      width: 100%;
      box-shadow: var(--shadow-card);
    }
    
    /* 卡片通用 */
    .card-custom {
      background: var(--white);
      border: none;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      height: 100%;
      padding: 2rem 1.5rem;
      border: 1px solid var(--border-light);
    }
    
    .card-custom:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(212,175,55,0.25);
    }
    
    .icon-gold-circle {
      width: 54px;
      height: 54px;
      background: var(--gold-light);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--gold);
      font-size: 1.6rem;
      margin-bottom: 1.5rem;
    }
    
    .service-card-img {
      height: 140px;
      object-fit: cover;
      border-radius: 12px;
      margin-bottom: 1.4rem;
      background: #f1f5f9;
    }
    
    .compare-card-left {
      background: #f5f7fa;
      border-radius: 20px;
      padding: 2rem;
    }
    
    .compare-card-right {
      background: var(--white);
      border-radius: 20px;
      padding: 2rem;
      box-shadow: 0 15px 30px rgba(212,175,55,0.15);
      border: 1px solid rgba(212,175,55,0.2);
    }
    
    .accordion-button:not(.collapsed) {
      background-color: #F8FAFB;
      color: var(--deep-blue);
      font-weight: 600;
      box-shadow: none;
    }
    
    .accordion-button:focus {
      border-color: var(--gold);
      box-shadow: 0 0 0 0.15rem rgba(212,175,55,0.25);
    }
    
    .accordion-item {
      border: none;
      border-bottom: 1px solid var(--border-light);
    }
    
    .form-control {
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      padding: 0.8rem 1.2rem;
      background: var(--white);
    }
    
    .form-control:focus {
      border-color: var(--gold);
      box-shadow: 0 0 0 0.18rem rgba(212,175,55,0.25);
    }
    
    footer {
      background: var(--deep-blue);
      color: rgba(255,255,255,0.8);
    }
    
    @media (max-width: 768px) {
      .navbar-dock {
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.8rem;
        padding: 0.8rem 1.2rem;
      }
      .nav-links {
        gap: 1.4rem;
        flex-wrap: wrap;
        justify-content: center;
      }
      .hero-title {
        font-size: 2.3rem;
      }
      .metric-number {
        font-size: 1.9rem;
      }
    }