/* roulang page: index */
:root {
      --primary-magma: #F85C1E;
      --primary-magma-deep: #E04A10;
      --dark-rock: #1A1A1A;
      --accent-cyan: #00E5CC;
      --bg-light: #FAFAFA;
      --white: #FFFFFF;
      --text-body: #333333;
      --text-muted: #555555;
      --border-light: #E0E0E0;
      --card-shadow: 0 8px 30px rgba(0,0,0,0.04);
      --card-shadow-hover: 0 16px 40px rgba(248,92,30,0.12);
      --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --font-din: "DIN Alternate", "PingFang SC", sans-serif;
      --border-radius-card: 20px;
      --border-radius-btn: 50px;
      --border-radius-input: 12px;
      --transition-smooth: 0.3s ease;
      --section-gap: 80px;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-light);
      color: var(--text-body);
      font-size: 16px;
      line-height: 1.7;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
    }
    
    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-weight: 700;
      letter-spacing: -0.5px;
      color: var(--dark-rock);
    }
    
    a {
      text-decoration: none;
      transition: color var(--transition-smooth);
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    /* 覆盖Bootstrap默认变量，重塑组件风格 */
    .btn {
      border-radius: var(--border-radius-btn);
      font-weight: 600;
      letter-spacing: 0.5px;
      padding: 12px 28px;
      font-size: 16px;
      transition: all var(--transition-smooth);
      border: 2px solid transparent;
      box-shadow: none;
    }
    .btn-primary {
      background-color: var(--primary-magma);
      border-color: var(--primary-magma);
      color: var(--white);
    }
    .btn-primary:hover, .btn-primary:focus {
      background-color: var(--primary-magma-deep);
      border-color: var(--primary-magma-deep);
      box-shadow: 0 0 20px rgba(248,92,30,0.4);
    }
    .btn-outline-light {
      border-color: var(--white);
      color: var(--white);
      background: transparent;
    }
    .btn-outline-light:hover {
      background-color: var(--white);
      color: var(--dark-rock);
    }
    .btn-outline-magma {
      border-color: var(--primary-magma);
      color: var(--primary-magma);
      background: transparent;
    }
    .btn-outline-magma:hover {
      background-color: var(--primary-magma);
      color: var(--white);
    }
    
    .card {
      border-radius: var(--border-radius-card);
      border: none;
      box-shadow: var(--card-shadow);
      transition: all var(--transition-smooth);
      background: var(--white);
    }
    .card:hover {
      transform: translateY(-6px);
      box-shadow: var(--card-shadow-hover);
    }
    
    .navbar {
      background-color: var(--white);
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
      height: 68px;
      padding: 0;
    }
    .navbar-brand {
      font-size: 24px;
      font-weight: 700;
      color: var(--primary-magma) !important;
      letter-spacing: -0.5px;
      display: flex;
      align-items: center;
    }
    .navbar-brand svg {
      margin-right: 8px;
    }
    .nav-link {
      color: var(--text-muted) !important;
      font-weight: 500;
      margin: 0 8px;
      transition: color var(--transition-smooth);
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary-magma) !important;
    }
    .nav-link.active {
      border-bottom: 2px solid var(--accent-cyan);
    }
    .search-box {
      background: #F5F5F5;
      border-radius: 50px;
      padding: 8px 18px;
      display: flex;
      align-items: center;
      color: var(--text-muted);
    }
    .search-box input {
      background: transparent;
      border: none;
      outline: none;
      padding-left: 8px;
      width: 120px;
    }
    
    .section-padding {
      padding-top: var(--section-gap);
      padding-bottom: var(--section-gap);
    }
    
    .section-title {
      font-size: 40px;
      font-weight: 700;
      text-align: center;
      margin-bottom: 16px;
      color: var(--dark-rock);
    }
    .section-title::after {
      content: "";
      display: block;
      width: 40px;
      height: 4px;
      background: var(--accent-cyan);
      margin: 16px auto 0;
    }
    
    .hero-section {
      background: linear-gradient(rgba(0,0,0,0.45), rgba(0,0,0,0.5)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 100vh;
      display: flex;
      align-items: center;
      color: white;
    }
    .hero-title {
      font-size: 56px;
      font-weight: 700;
      background: linear-gradient(135deg, #F85C1E 0%, #FF9A6C 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      line-height: 1.1;
    }
    
    .dark-block {
      background-color: var(--dark-rock);
      color: white;
    }
    
    .stat-number {
      font-family: var(--font-din);
      font-size: 48px;
      font-weight: 800;
      color: var(--accent-cyan);
    }
    
    .avatar-placeholder {
      width: 48px;
      height: 48px;
      background: #ddd;
      border-radius: 50%;
    }
    
    .testimonial-card {
      background: white;
      border-radius: 20px;
      padding: 32px;
      box-shadow: var(--card-shadow);
      min-width: 280px;
    }
    
    .faq-accordion .accordion-button {
      font-weight: 600;
      font-size: 18px;
      color: var(--dark-rock);
      background: white;
      box-shadow: none;
      border-radius: 12px !important;
      padding: 20px 24px;
    }
    .faq-accordion .accordion-button:not(.collapsed) {
      color: var(--primary-magma);
      background-color: #FFF5F0;
      box-shadow: none;
    }
    .faq-accordion .accordion-body {
      background: white;
      border-radius: 0 0 12px 12px;
      padding: 0 24px 20px;
    }
    
    .cta-gradient {
      background: linear-gradient(135deg, #1A1A1A 0%, #2D2D2D 100%);
    }
    
    footer {
      background-color: var(--dark-rock);
      color: rgba(255,255,255,0.7);
    }
    footer a {
      color: rgba(255,255,255,0.7);
    }
    footer a:hover {
      color: var(--primary-magma);
    }
    
    @media (max-width: 768px) {
      .hero-title {
        font-size: 36px;
      }
      .section-title {
        font-size: 32px;
      }
      .section-padding {
        padding-top: 50px;
        padding-bottom: 50px;
      }
    }

@keyframes slowSpin { from {transform: rotate(0deg);} to {transform: rotate(360deg);} }
    @keyframes float { 0% {transform: translateY(0px);} 50% {transform: translateY(-15px);} 100% {transform: translateY(0px);} }
    .hide-scrollbar::-webkit-scrollbar { display: none; }
    .hide-scrollbar { -ms-overflow-style: none; scrollbar-width: none; }