/* roulang page: index */
:root {
      --deep-blue: #0A0E27;
      --dark-blue: #141A3A;
      --gold: #C59B5F;
      --cyan: #00E5FF;
      --white-soft: rgba(255,255,255,0.75);
      --white-muted: rgba(255,255,255,0.5);
      --glass-bg: rgba(255,255,255,0.03);
      --glass-border: rgba(197,155,95,0.2);
      --card-shadow: 0 8px 32px rgba(0,0,0,0.4);
      --border-radius-lg: 16px;
      --border-radius-btn: 50px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --font-number: "Inter", "SF Pro Text", sans-serif;
      --transition-smooth: all 0.25s ease;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-sans);
      background: linear-gradient(135deg, #0A0E27 0%, #141A3A 100%);
      color: var(--white-soft);
      line-height: 1.8;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
      position: relative;
    }
    
    /* 细微网格纹理 */
    body::before {
      content: "";
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-image: radial-gradient(rgba(197,155,95,0.08) 1px, transparent 1px);
      background-size: 32px 32px;
      pointer-events: none;
      z-index: 0;
    }
    
    /* 所有主要内容相对层级 */
    header, main, footer, section {
      position: relative;
      z-index: 2;
    }
    
    /* 自定义导航 */
    .navbar {
      background: rgba(10,14,39,0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(197,155,95,0.25);
      padding: 0.75rem 0;
      transition: var(--transition-smooth);
    }
    .navbar-brand {
      font-weight: 700;
      font-size: 1.8rem;
      color: #ffffff !important;
      letter-spacing: 0.5px;
      display: flex;
      align-items: center;
    }
    .navbar-brand span {
      color: var(--gold);
      margin-left: 6px;
    }
    .navbar-nav .nav-link {
      color: var(--gold) !important;
      font-weight: 500;
      margin: 0 0.5rem;
      transition: var(--transition-smooth);
      font-size: 1rem;
    }
    .navbar-nav .nav-link:hover,
    .navbar-nav .nav-link.active {
      color: var(--cyan) !important;
      text-shadow: 0 0 8px rgba(0,229,255,0.6);
    }
    .btn-primary-cta {
      background: var(--cyan);
      color: #0A0E27 !important;
      font-weight: 700;
      border-radius: var(--border-radius-btn);
      padding: 0.6rem 1.8rem;
      border: none;
      box-shadow: 0 0 20px rgba(0,229,255,0.5);
      transition: var(--transition-smooth);
      letter-spacing: 0.5px;
    }
    .btn-primary-cta:hover {
      background: #33eaff;
      box-shadow: 0 0 32px rgba(0,229,255,0.8);
      transform: translateY(-2px);
      color: #0A0E27;
    }
    .navbar-toggler {
      border-color: var(--gold);
    }
    .navbar-toggler-icon {
      background-image: url("data:image/svg+xml,%3csvg viewBox='0 0 30 30' xmlns='http://www.w3.org/2000/svg'%3e%3cpath stroke='rgba(197,155,95,1)' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
    }
    
    /* 按钮通用 */
    .btn-outline-gold {
      background: transparent;
      border: 1px solid var(--gold);
      color: var(--gold);
      border-radius: var(--border-radius-btn);
      padding: 0.5rem 2rem;
      font-weight: 500;
      transition: var(--transition-smooth);
    }
    .btn-outline-gold:hover {
      background: rgba(197,155,95,0.15);
      color: var(--gold);
      border-color: var(--gold);
    }
    
    /* 板块标题 */
    .section-title {
      font-weight: 600;
      font-size: 2rem;
      color: white;
      margin-bottom: 0.75rem;
      position: relative;
      display: inline-block;
    }
    .section-title::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -8px;
      width: 65%;
      height: 3px;
      background: var(--gold);
      border-radius: 3px;
    }
    
    /* 玻璃卡片 */
    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid var(--glass-border);
      border-radius: var(--border-radius-lg);
      box-shadow: var(--card-shadow);
      padding: 2rem;
      transition: var(--transition-smooth);
    }
    
    /* Hero区域 */
    .hero-section {
      padding: 160px 0 100px;
      background: radial-gradient(circle at 80% 20%, rgba(0,229,255,0.08) 0%, transparent 50%);
    }
    .hero-title {
      font-weight: 700;
      font-size: 3.5rem;
      letter-spacing: 0.02em;
      color: white;
    }
    .hero-highlight {
      color: var(--cyan);
    }
    
    /* 服务卡片序号 */
    .service-number {
      font-family: var(--font-number);
      color: var(--gold);
      font-weight: 700;
      font-size: 2rem;
      opacity: 0.9;
    }
    .service-card {
      border: 1px solid rgba(197,155,95,0.25);
      transition: all 0.3s ease;
    }
    .service-card:hover {
      border-color: var(--cyan);
      box-shadow: 0 0 28px rgba(0,229,255,0.25);
      transform: translateY(-6px);
    }
    
    /* 数据数字 */
    .counter-number {
      font-family: var(--font-number);
      font-weight: 700;
      color: var(--cyan);
      font-size: 3rem;
      line-height: 1.2;
    }
    
    /* FAQ 手风琴 */
    .accordion-button {
      background: rgba(10,14,39,0.7);
      color: var(--gold);
      font-weight: 600;
      border: 1px solid rgba(197,155,95,0.2);
    }
    .accordion-button:not(.collapsed) {
      background: rgba(20,26,58,0.9);
      color: var(--cyan);
      box-shadow: none;
    }
    .accordion-button::after {
      filter: brightness(0) saturate(100%) invert(77%) sepia(28%) saturate(631%) hue-rotate(136deg) brightness(95%) contrast(101%);
    }
    
    /* CTA脉冲 */
    @keyframes pulseGlow {
      0% { box-shadow: 0 0 18px rgba(0,229,255,0.6); }
      50% { box-shadow: 0 0 38px rgba(0,229,255,0.9); }
      100% { box-shadow: 0 0 18px rgba(0,229,255,0.6); }
    }
    .pulse-btn {
      animation: pulseGlow 2.2s infinite;
    }
    
    footer a {
      color: var(--white-muted);
      text-decoration: none;
    }
    footer a:hover {
      color: var(--gold);
    }
    
    @media (max-width: 768px) {
      .hero-title {
        font-size: 2.2rem;
      }
      .section-title {
        font-size: 1.8rem;
      }
    }