/* roulang page: index */
:root {
      --primary-deep: #1E2F2B;
      --accent-gold: #C9A96E;
      --accent-gold-hover: #B8923F;
      --bg-warm: #F7F5F0;
      --text-dark: #2C2C2C;
      --text-muted: #5A5A5A;
      --white: #FFFFFF;
      --border-light: rgba(201,169,110,0.2);
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-hover: 0 8px 30px rgba(0,0,0,0.08);
      --radius-card: 12px;
      --radius-btn: 30px;
      --radius-nav: 40px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
      --transition: 0.3s ease;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-sans);
      background-color: var(--white);
      color: var(--text-dark);
      line-height: 1.8;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }
    
    h1, h2, h3, h4 {
      font-weight: 600;
      margin-top: 0;
    }
    
    h1 {
      font-weight: 700;
      font-size: clamp(2.5rem, 5vw, 4rem);
      line-height: 1.2;
      letter-spacing: 0.02em;
      color: var(--primary-deep);
    }
    
    h2 {
      font-size: 2rem;
      margin-bottom: 0.5rem;
      color: var(--primary-deep);
    }
    
    h3 {
      font-size: 1.25rem;
      font-weight: 600;
    }
    
    p {
      color: var(--text-muted);
      margin-bottom: 1.2rem;
    }
    
    a {
      color: var(--accent-gold);
      text-decoration: none;
      transition: var(--transition);
    }
    
    a:hover {
      color: var(--accent-gold-hover);
      text-decoration: none;
    }
    
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1.5rem;
    }
    
    /* 导航栏 - 悬浮胶囊 */
    .custom-nav {
      position: fixed;
      top: 16px;
      left: 50%;
      transform: translateX(-50%);
      width: 90%;
      max-width: 1200px;
      z-index: 1000;
      background: rgba(255,255,255,0.88);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-radius: var(--radius-nav);
      padding: 0.6rem 2rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: 0 8px 20px rgba(0,0,0,0.03);
      transition: var(--transition);
    }
    
    .logo {
      font-weight: 700;
      font-size: 1.4rem;
      color: var(--primary-deep);
      letter-spacing: 0.5px;
      white-space: nowrap;
    }
    
    .nav-links {
      display: flex;
      align-items: center;
      gap: 2rem;
      list-style: none;
      margin: 0;
      padding: 0;
    }
    
    .nav-links a {
      color: var(--text-dark);
      font-size: 0.95rem;
      font-weight: 500;
      padding: 0.3rem 0;
      border-bottom: 2px solid transparent;
      transition: var(--transition);
    }
    
    .nav-links a:hover {
      color: var(--accent-gold);
      border-bottom-color: var(--accent-gold);
    }
    
    .nav-cta {
      background: var(--accent-gold);
      color: white !important;
      padding: 0.4rem 1.2rem;
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 600;
      white-space: nowrap;
      transition: var(--transition);
    }
    
    .nav-cta:hover {
      background: var(--accent-gold-hover);
      color: white !important;
      border-bottom: none !important;
    }
    
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.8rem;
      color: var(--primary-deep);
      cursor: pointer;
    }
    
    /* Hero */
    .hero-section {
      padding: 10rem 0 6rem;
      background-color: var(--white);
      position: relative;
      overflow: hidden;
    }
    
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 3rem;
    }
    
    .hero-left {
      flex: 1;
    }
    
    .hero-right {
      flex: 1;
      display: flex;
      justify-content: center;
    }
    
    .hero-image {
      width: 100%;
      max-width: 550px;
      border-radius: 16px;
      box-shadow: var(--shadow-sm);
      object-fit: cover;
      aspect-ratio: 4/3;
      background: #E8E4DB;
    }
    
    .hero-subtitle {
      font-size: 1.125rem;
      color: var(--text-muted);
      margin: 1.5rem 0 2rem;
      line-height: 1.7;
      max-width: 500px;
    }
    
    .btn-group {
      display: flex;
      flex-wrap: wrap;
      gap: 1rem;
    }
    
    .btn-primary {
      background: var(--accent-gold);
      color: white;
      padding: 0.75rem 2rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
      display: inline-block;
      transition: var(--transition);
      border: none;
      cursor: pointer;
    }
    
    .btn-primary:hover {
      background: var(--accent-gold-hover);
      color: white;
    }
    
    .btn-outline {
      border: 1.5px solid var(--accent-gold);
      color: var(--accent-gold);
      padding: 0.75rem 2rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
      display: inline-block;
      transition: var(--transition);
      background: transparent;
    }
    
    .btn-outline:hover {
      background: var(--accent-gold);
      color: white;
    }
    
    /* 区块通用 */
    .section {
      padding: 5rem 0;
    }
    
    .section-dark {
      background-color: var(--primary-deep);
      color: white;
    }
    
    .section-warm {
      background-color: var(--bg-warm);
    }
    
    /* 核心优势 非对称栅格 */
    .advantages-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr;
      gap: 1.5rem;
      margin-top: 2.5rem;
    }
    
    .adv-card {
      background: var(--white);
      padding: 2rem;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    
    .adv-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    
    .adv-main {
      grid-row: span 2;
      background: var(--primary-deep);
      color: white;
    }
    
    .adv-main h3, .adv-main p {
      color: rgba(255,255,255,0.9);
    }
    
    .adv-icon {
      font-size: 2rem;
      color: var(--accent-gold);
      margin-bottom: 1rem;
    }
    
    .right-small-cards {
      display: grid;
      grid-template-rows: 1fr 1fr;
      gap: 1.5rem;
    }
    
    /* 业务版图卡片 */
    .biz-cards {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
      margin-top: 2.5rem;
    }
    
    .biz-card {
      background: var(--white);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
      transition: var(--transition);
    }
    
    .biz-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }
    
    .biz-img {
      height: 200px;
      object-fit: cover;
      width: 100%;
      background: #E8E4DB;
    }
    
    .biz-content {
      padding: 1.5rem;
    }
    
    .text-link {
      color: var(--accent-gold);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 0.3rem;
      transition: var(--transition);
    }
    
    .text-link i {
      transition: transform 0.2s;
    }
    
    .text-link:hover i {
      transform: translateX(4px);
    }
    
    /* 数据条 */
    .data-strip {
      display: flex;
      justify-content: space-around;
      text-align: center;
      flex-wrap: wrap;
      gap: 2rem;
    }
    
    .data-item h3 {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--accent-gold);
      margin-bottom: 0.25rem;
    }
    
    .data-item p {
      color: rgba(255,255,255,0.8);
      font-size: 0.95rem;
      margin: 0;
    }
    
    /* 流程 */
    .process-steps {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      margin-top: 2.5rem;
      position: relative;
    }
    
    .step {
      text-align: center;
      flex: 1;
      padding: 0 0.5rem;
    }
    
    .step-number {
      background: var(--accent-gold);
      color: white;
      width: 40px;
      height: 40px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 1rem;
      font-weight: 700;
    }
    
    /* 案例左图右文 */
    .case-row {
      display: flex;
      gap: 2rem;
      margin-bottom: 2.5rem;
      background: var(--white);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    
    .case-row:hover {
      box-shadow: var(--shadow-hover);
    }
    
    .case-img {
      width: 40%;
      object-fit: cover;
      background: #E8E4DB;
    }
    
    .case-info {
      padding: 2rem;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    
    .tag {
      background: rgba(201,169,110,0.15);
      color: var(--accent-gold);
      padding: 0.2rem 0.8rem;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 600;
      display: inline-block;
      margin-bottom: 0.8rem;
      width: fit-content;
    }
    
    /* FAQ */
    .accordion-item {
      border-bottom: 1px solid var(--border-light);
      padding: 1.2rem 0;
    }
    
    .accordion-question {
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    
    .accordion-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: var(--text-muted);
    }
    
    .accordion-item.active .accordion-answer {
      max-height: 200px;
      margin-top: 0.8rem;
    }
    
    /* Footer */
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1.5fr 1.5fr;
      gap: 2rem;
    }
    
    .copyright {
      text-align: center;
      margin-top: 2.5rem;
      font-size: 0.8rem;
      opacity: 0.7;
    }
    
    /* 响应式 */
    @media (max-width: 1024px) {
      .biz-cards {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    
    @media (max-width: 768px) {
      .custom-nav {
        width: 95%;
        padding: 0.6rem 1.5rem;
      }
      
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: rgba(255,255,255,0.95);
        backdrop-filter: blur(15px);
        border-radius: 20px;
        padding: 1.5rem;
        gap: 1rem;
        box-shadow: var(--shadow-sm);
      }
      
      .nav-links.active {
        display: flex;
      }
      
      .menu-toggle {
        display: block;
      }
      
      .hero-grid {
        flex-direction: column;
      }
      
      .advantages-grid {
        grid-template-columns: 1fr;
      }
      
      .biz-cards {
        grid-template-columns: 1fr;
      }
      
      .case-row {
        flex-direction: column;
      }
      
      .case-img {
        width: 100%;
        height: 200px;
      }
      
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      
      .data-strip {
        justify-content: center;
      }
      
      .process-steps {
        flex-direction: column;
        gap: 2rem;
      }
    }
    
    @media (max-width: 520px) {
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }