/* roulang page: index */
:root {
      --deep-brown: #3E2C23;
      --charcoal-green: #1E2B24;
      --champagne: #D4B68C;
      --warm-white: #F7F4EF;
      --burgundy: #7A2E3A;
      --amber-copper: #B87333;
      --soft-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
      --hover-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
      --radius-card: 12px;
      --radius-btn: 24px;
      --font-serif: 'Noto Serif SC', 'ZCOOL XiaoWei', serif;
      --font-sans: 'Noto Sans SC', 'Inter', 'DM Sans', sans-serif;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--warm-white);
      color: #2C241A;
      margin: 0;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    h1, h2, h3, h4 {
      font-family: var(--font-serif);
      font-weight: 700;
    }
    a {
      color: var(--amber-copper);
      transition: all 0.2s ease;
    }
    a:hover {
      color: var(--burgundy);
      text-decoration: none;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1.5rem;
    }
    /* 卡片化导航面板 */
    .nav-panel {
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-radius: 20px;
      margin: 16px auto 0;
      max-width: 1200px;
      padding: 0.9rem 2rem;
      box-shadow: 0 4px 18px rgba(0,0,0,0.04);
      display: flex;
      align-items: center;
      justify-content: space-between;
      position: sticky;
      top: 16px;
      z-index: 40;
      border: 1px solid rgba(212,182,140,0.2);
    }
    .logo-area {
      font-family: var(--font-serif);
      font-weight: 700;
      font-size: 1.6rem;
      color: var(--deep-brown);
      letter-spacing: 1px;
    }
    .logo-area span {
      color: var(--amber-copper);
    }
    .nav-icons {
      display: flex;
      gap: 1.8rem;
      align-items: center;
    }
    .nav-icon-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-decoration: none;
      color: var(--deep-brown);
      font-size: 0.8rem;
      font-weight: 500;
      transition: 0.2s;
    }
    .nav-icon-card {
      width: 42px;
      height: 42px;
      background: rgba(212,182,140,0.15);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      color: var(--deep-brown);
      margin-bottom: 4px;
      transition: 0.2s;
    }
    .nav-icon-item:hover .nav-icon-card {
      background: var(--champagne);
      color: white;
      box-shadow: 0 4px 10px rgba(212,182,140,0.3);
    }
    .cta-btn-nav {
      background: var(--amber-copper);
      color: white;
      border-radius: 30px;
      padding: 0.7rem 1.8rem;
      font-weight: 600;
      font-size: 0.95rem;
      border: none;
      transition: 0.2s;
      white-space: nowrap;
    }
    .cta-btn-nav:hover {
      background: #9e612b;
      color: white;
    }
    /* 移动汉堡 */
    .hamburger {
      display: none;
      font-size: 1.8rem;
      color: var(--deep-brown);
      background: none;
      border: none;
    }
    @media (max-width: 640px) {
      .nav-panel {
        padding: 0.8rem 1.2rem;
      }
      .nav-icons {
        display: none;
      }
      .hamburger {
        display: block;
      }
      .mobile-menu {
        display: none;
        position: absolute;
        top: 80px;
        left: 1rem;
        right: 1rem;
        background: white;
        border-radius: 20px;
        padding: 1.5rem;
        flex-direction: column;
        gap: 1rem;
        box-shadow: var(--hover-shadow);
        z-index: 50;
      }
      .mobile-menu.active {
        display: flex;
      }
    }
    /* Hero */
    .hero {
      background: linear-gradient(135deg, #3E2C23 0%, #1E2B24 100%);
      position: relative;
      overflow: hidden;
      border-radius: 32px;
      margin: 32px auto 40px;
      max-width: 1200px;
      padding: 4rem 2.5rem;
      color: white;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-blend-mode: overlay;
    }
    .hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background: repeating-linear-gradient(45deg, rgba(255,255,255,0.03) 0px, rgba(255,255,255,0.03) 2px, transparent 2px, transparent 8px);
      pointer-events: none;
    }
    .hero h1 {
      font-size: clamp(2.6rem, 5vw, 4rem);
      font-weight: 800;
      color: #F5E7D3;
      text-shadow: 0 4px 12px rgba(0,0,0,0.3);
      position: relative;
    }
    .hero .sub {
      font-size: 1.25rem;
      font-weight: 300;
      color: #E6D7BD;
      margin: 1rem 0 2rem;
    }
    .btn-primary {
      background: var(--amber-copper);
      color: white;
      font-weight: 600;
      padding: 0.9rem 2.2rem;
      border-radius: 30px;
      display: inline-block;
      margin-right: 1rem;
      transition: 0.2s;
      border: none;
    }
    .btn-primary:hover {
      background: #9e612b;
      color: white;
    }
    .btn-outline {
      background: transparent;
      border: 1px solid var(--champagne);
      color: var(--champagne);
      padding: 0.9rem 2.2rem;
      border-radius: 30px;
      font-weight: 500;
    }
    .metric-badges {
      display: flex;
      gap: 2rem;
      margin-top: 2.5rem;
    }
    .badge-num {
      font-size: 2rem;
      font-weight: 700;
      color: var(--champagne);
    }
    @media (max-width: 640px) {
      .hero {
        margin: 16px;
        padding: 2.5rem 1.2rem;
      }
      .metric-badges {
        flex-direction: column;
        gap: 1rem;
      }
    }
    /* 通用区块 */
    section {
      padding: 3.5rem 0;
    }
    h2 {
      font-size: 2rem;
      color: var(--deep-brown);
    }
    .card-light {
      background: #FFFFFFF2;
      backdrop-filter: blur(4px);
      border-radius: 16px;
      padding: 1.8rem;
      box-shadow: var(--soft-shadow);
      border: 1px solid rgba(0,0,0,0.03);
      transition: all 0.25s;
    }
    .card-light:hover {
      box-shadow: var(--hover-shadow);
      transform: translateY(-4px);
    }
    /* 指标看板 */
    .metric-grid {
      display: flex;
      gap: 1.5rem;
      justify-content: center;
      flex-wrap: wrap;
    }
    .metric-card {
      background: #FEFCF9;
      border-radius: 20px;
      padding: 1.8rem;
      min-width: 150px;
      text-align: center;
    }
    .big-number {
      font-size: 3rem;
      font-weight: 700;
      color: var(--amber-copper);
      font-family: 'Inter', sans-serif;
    }
    /* 服务卡 */
    .service-card {
      border-top: 5px solid var(--champagne);
    }
    .service-icon {
      font-size: 2rem;
      color: var(--champagne);
    }
    /* 对比 */
    .compare-box {
      background: white;
      border-radius: 24px;
      padding: 2rem;
    }
    .vs-col {
      padding: 1rem;
    }
    .list-check li {
      list-style: none;
      margin-bottom: 0.8rem;
    }
    /* FAQ */
    .faq-item {
      background: #FEFCF9;
      border-radius: 14px;
      margin-bottom: 0.8rem;
    }
    .faq-question {
      font-weight: 600;
      padding: 1rem 1.5rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-answer {
      padding: 0 1.5rem 1.2rem;
      display: none;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    /* 联系表单 */
    .contact-dark {
      background: #2C241A;
      background-image: url('/assets/images/backpic/back-2.webp');
      background-size: cover;
      background-blend-mode: overlay;
      border-radius: 28px;
      padding: 3rem;
      color: white;
    }
    .input-transparent {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.4);
      color: white;
      border-radius: 8px;
      padding: 0.8rem;
    }
    .input-transparent:focus {
      border-color: var(--champagne);
      outline: none;
    }
    .footer {
      background: #1E2B24;
      color: #D9CFBF;
      padding: 2.5rem 0;
    }
    @media (max-width: 768px) {
      .contact-dark {
        padding: 2rem;
      }
    }