/* roulang page: index */
:root {
      --primary-deep: #1E2D2B;
      --primary-soft: #2A3A37;
      --accent-gold: #C89B5E;
      --accent-coral: #E07B6C;
      --bg-warm: #FAF7F4;
      --card-bg: #FFFFFF;
      --text-main: #2C2C2C;
      --text-muted: #6B6B6B;
      --text-light: #F5F0EB;
      --border-light: rgba(0,0,0,0.04);
      --shadow-card: 0 2px 16px rgba(0,0,0,0.04), 0 0 0 1px rgba(0,0,0,0.03);
      --shadow-hover: 0 8px 30px rgba(0,0,0,0.08), 0 0 0 1px rgba(0,0,0,0.05);
      --radius-lg: 12px;
      --radius-md: 8px;
      --transition: all 0.25s ease;
      --font-stack: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-stack);
      background-color: var(--bg-warm);
      color: var(--text-main);
      line-height: 1.7;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
    }
    
    h1, h2, h3, h4, .h1, .h2, .h3, .h4 {
      font-weight: 700;
      letter-spacing: -0.02em;
      line-height: 1.25;
    }
    
    h2 {
      font-size: 2.4rem;
      margin-bottom: 1rem;
    }
    
    .container {
      max-width: 1200px;
      padding-left: 20px;
      padding-right: 20px;
    }
    
    /* 导航 */
    .navbar {
      background: rgba(255,255,255,0.9);
      backdrop-filter: blur(10px);
      padding: 1rem 0;
      transition: var(--transition);
      box-shadow: 0 2px 20px rgba(0,0,0,0.02);
    }
    
    .navbar.scrolled {
      background: rgba(255,255,255,0.95);
      box-shadow: 0 4px 20px rgba(0,0,0,0.04);
    }
    
    .navbar-brand {
      font-weight: 800;
      font-size: 1.5rem;
      color: var(--primary-deep) !important;
      letter-spacing: -0.5px;
    }
    
    .nav-link {
      font-weight: 500;
      color: #4A4A4A !important;
      margin: 0 0.8rem;
      padding: 0.5rem 0 !important;
      position: relative;
      transition: var(--transition);
    }
    
    .nav-link:hover, .nav-link.active {
      color: var(--accent-gold) !important;
    }
    
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 3px;
      background: var(--accent-gold);
      transition: width 0.25s ease;
    }
    
    .nav-link:hover::after, .nav-link.active::after {
      width: 100%;
    }
    
    .navbar-toggler {
      border: none;
      color: var(--accent-gold);
    }
    
    .navbar-toggler-icon {
      background-image: none;
      position: relative;
    }
    
    .navbar-toggler-icon::before {
      content: "☰";
      font-size: 1.8rem;
      color: var(--accent-gold);
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
    }
    
    @media (max-width: 991px) {
      .navbar-collapse {
        background: white;
        padding: 1.5rem;
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-hover);
        margin-top: 1rem;
      }
      .nav-link {
        margin: 0.5rem 0;
        text-align: center;
      }
    }
    
    /* Hero */
    .hero {
      background: linear-gradient(135deg, #1E2D2B 0%, #2A3A37 100%);
      min-height: 90vh;
      display: flex;
      align-items: center;
      position: relative;
      overflow: hidden;
      padding: 6rem 0 4rem;
    }
    
    .hero-bg-image {
      position: absolute;
      right: -10%;
      top: -20%;
      width: 70%;
      height: 140%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      opacity: 0.15;
      z-index: 0;
      pointer-events: none;
    }
    
    .hero-content {
      position: relative;
      z-index: 2;
    }
    
    .hero h1 {
      font-size: 3.2rem;
      font-weight: 800;
      color: var(--text-light);
      margin-bottom: 1.5rem;
    }
    
    .hero .lead {
      font-size: 1.25rem;
      color: rgba(245,240,235,0.9);
      max-width: 620px;
      margin-bottom: 2.5rem;
    }
    
    .hero .gold-highlight {
      color: var(--accent-gold);
      font-weight: 600;
    }
    
    .btn-primary-custom {
      background: var(--accent-coral);
      border: none;
      color: white;
      font-weight: 600;
      padding: 0.9rem 2.2rem;
      border-radius: var(--radius-md);
      transition: var(--transition);
      box-shadow: 0 4px 12px rgba(224,123,108,0.3);
    }
    
    .btn-primary-custom:hover {
      background: #d96b5c;
      transform: scale(1.03);
      box-shadow: 0 8px 20px rgba(224,123,108,0.4);
      color: white;
    }
    
    .btn-outline-custom {
      background: transparent;
      border: 2px solid var(--primary-deep);
      color: var(--primary-deep);
      font-weight: 600;
      padding: 0.9rem 2.2rem;
      border-radius: var(--radius-md);
      transition: var(--transition);
    }
    
    .btn-outline-custom:hover {
      background: rgba(30,45,43,0.08);
      border-color: var(--accent-gold);
      color: var(--accent-gold);
      transform: scale(1.03);
    }
    
    .hero .btn-outline-custom {
      border-color: rgba(245,240,235,0.6);
      color: var(--text-light);
    }
    
    .hero .btn-outline-custom:hover {
      background: rgba(255,255,255,0.1);
      border-color: var(--accent-gold);
      color: var(--accent-gold);
    }
    
    /* 板块通用 */
    section {
      padding: 5rem 0;
    }
    
    .section-title {
      margin-bottom: 3rem;
    }
    
    .section-title h2 {
      color: var(--primary-deep);
    }
    
    .section-title p {
      color: var(--text-muted);
      font-size: 1.1rem;
      max-width: 680px;
      margin: 0 auto;
    }
    
    /* 优势区 错落布局 */
    .advantage-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      align-items: start;
    }
    
    .advantage-left {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    
    .advantage-card {
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      padding: 2rem;
      box-shadow: var(--shadow-card);
      border-left: 4px solid var(--accent-gold);
      transition: var(--transition);
    }
    
    .advantage-card:hover {
      border-left-width: 8px;
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    
    .advantage-icon {
      font-size: 2rem;
      color: var(--accent-gold);
      margin-bottom: 1rem;
    }
    
    .advantage-card h4 {
      font-weight: 700;
      margin-bottom: 0.5rem;
    }
    
    @media (max-width: 768px) {
      .advantage-grid {
        grid-template-columns: 1fr;
      }
    }
    
    /* 产品卡片 */
    .service-card {
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      height: 100%;
    }
    
    .service-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    
    .service-img {
      height: 200px;
      background-size: cover;
      background-position: center;
      transition: transform 0.35s ease;
    }
    
    .service-card:hover .service-img {
      transform: scale(1.03);
    }
    
    .service-body {
      padding: 1.8rem;
    }
    
    .tag {
      display: inline-block;
      background: transparent;
      border: 1px solid var(--accent-gold);
      color: var(--accent-gold);
      padding: 0.2rem 0.8rem;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 600;
      margin-right: 0.4rem;
      margin-bottom: 0.5rem;
    }
    
    /* 数据背书 */
    .stats-section {
      background: var(--primary-deep);
      color: var(--text-light);
    }
    
    .stat-number {
      font-size: 3rem;
      font-weight: 800;
      color: var(--accent-gold);
    }
    
    /* 案例交替 */
    .case-row {
      margin-bottom: 3rem;
      align-items: center;
    }
    
    .case-img {
      background-size: cover;
      background-position: center;
      border-radius: var(--radius-lg);
      height: 280px;
      width: 100%;
    }
    
    .case-highlight {
      color: var(--accent-coral);
      font-weight: 700;
      font-size: 1.3rem;
    }
    
    /* FAQ */
    .accordion-button {
      font-weight: 600;
      background: white;
      box-shadow: none;
      border-radius: var(--radius-md) !important;
      padding: 1.2rem 1.5rem;
    }
    
    .accordion-button:not(.collapsed) {
      background: #faf7f4;
      color: var(--primary-deep);
      box-shadow: none;
    }
    
    .accordion-button::after {
      display: none;
    }
    
    .accordion-button .faq-icon {
      color: var(--accent-gold);
      margin-right: 0.8rem;
      font-size: 0.9rem;
    }
    
    /* CTA */
    .cta-section {
      background: linear-gradient(135deg, #C89B5E 0%, #D4A96A 100%);
    }
    
    .cta-section h2 {
      color: #1E2D2B;
      font-weight: 800;
    }
    
    .btn-cta {
      background: white;
      color: var(--accent-coral);
      font-weight: 700;
      padding: 1rem 2.8rem;
      border-radius: var(--radius-md);
      border: none;
      transition: var(--transition);
    }
    
    .btn-cta:hover {
      background: #f5f0eb;
      transform: scale(1.03);
    }
    
    /* Footer */
    footer {
      background: var(--primary-deep);
      color: rgba(245,240,235,0.8);
      padding: 3rem 0 2rem;
    }
    
    footer a {
      color: rgba(245,240,235,0.8);
      text-decoration: none;
      transition: var(--transition);
    }
    
    footer a:hover {
      color: var(--accent-gold);
    }
    
    footer h5 {
      color: white;
      font-weight: 700;
    }
    
    @media (max-width: 768px) {
      h2 { font-size: 2rem; }
      .hero h1 { font-size: 2.2rem; }
      .stat-number { font-size: 2.4rem; }
    }