/* roulang page: index */
:root {
      --primary-burgundy: #8B1E3F;
      --primary-burgundy-dark: #6E152F;
      --accent-gold: #C8A96E;
      --accent-gold-light: #F0E8D8;
      --text-dark: #3A3335;
      --bg-warm: #FBF7F2;
      --bg-light-gray: #F5F0EB;
      --white: #FFFFFF;
      --border-light: #D4C9BC;
      --shadow-sm: 0 4px 20px rgba(58, 51, 53, 0.06);
      --shadow-md: 0 8px 30px rgba(58, 51, 53, 0.12);
      --radius-card: 16px;
      --radius-btn: 8px;
      --radius-chip: 20px;
      --radius-accordion: 12px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
      --transition-smooth: all 0.3s ease;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-dark);
      line-height: 1.8;
      margin: 0;
      padding: 0;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition-smooth);
    }
    .container {
      max-width: 1200px;
    }
    /* 导航 */
    .navbar {
      background-color: var(--bg-warm);
      border-bottom: 1px solid rgba(58,51,53,0.08);
      padding: 0.5rem 0;
      min-height: 72px;
    }
    .navbar-brand {
      font-size: 24px;
      font-weight: 700;
      color: var(--text-dark) !important;
      letter-spacing: -0.3px;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }
    .brand-icon {
      color: var(--accent-gold);
      font-size: 28px;
    }
    .navbar-nav .nav-link {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-dark) !important;
      padding: 8px 18px !important;
      border-radius: var(--radius-chip);
      margin: 0 4px;
      transition: var(--transition-smooth);
      background: transparent;
    }
    .navbar-nav .nav-link:hover,
    .navbar-nav .nav-link.active {
      background-color: var(--accent-gold-light);
      color: var(--text-dark) !important;
    }
    .navbar-nav .nav-link.cta-nav {
      background-color: var(--primary-burgundy);
      color: white !important;
      margin-left: 12px;
      padding: 8px 22px !important;
      font-weight: 600;
    }
    .navbar-nav .nav-link.cta-nav:hover {
      background-color: var(--primary-burgundy-dark);
      transform: scale(1.02);
    }
    .navbar-toggler {
      border: none;
      color: var(--text-dark);
    }
    .navbar-toggler:focus {
      box-shadow: none;
    }
    @media (max-width: 991px) {
      .navbar-nav {
        background: var(--bg-warm);
        padding: 1rem;
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-sm);
        margin-top: 0.5rem;
      }
      .navbar-nav .nav-link {
        display: block;
        text-align: center;
        margin: 6px 0;
      }
    }
    /* Hero */
    .hero {
      background: linear-gradient(135deg, rgba(139,30,63,0.82) 0%, rgba(58,51,53,0.9) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 90vh;
      display: flex;
      align-items: center;
      color: white;
      position: relative;
    }
    .hero-content {
      max-width: 680px;
    }
    .hero h1 {
      font-size: 42px;
      font-weight: 700;
      letter-spacing: -0.5px;
      color: white;
      margin-bottom: 1rem;
    }
    .hero .subtitle {
      font-size: 18px;
      color: var(--accent-gold);
      margin-bottom: 1.25rem;
    }
    .hero .desc {
      font-size: 16px;
      color: rgba(255,255,255,0.75);
      margin-bottom: 2rem;
      line-height: 1.7;
    }
    .btn-primary-milan {
      background-color: var(--primary-burgundy);
      border: none;
      padding: 12px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 16px;
      letter-spacing: 0.5px;
      color: white;
      transition: var(--transition-smooth);
    }
    .btn-primary-milan:hover {
      background-color: var(--primary-burgundy-dark);
      transform: scale(1.03);
      color: white;
    }
    .btn-outline-milan {
      border: 2px solid var(--accent-gold);
      color: var(--accent-gold);
      background: transparent;
      padding: 10px 30px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 16px;
      letter-spacing: 0.5px;
      transition: var(--transition-smooth);
    }
    .btn-outline-milan:hover {
      background-color: var(--accent-gold);
      color: white;
    }
    .trust-badge img {
      height: 32px;
      opacity: 0.75;
      filter: brightness(0) invert(1);
    }
    @media (max-width: 768px) {
      .hero h1 {
        font-size: 28px;
      }
    }
    /* 板块标题 */
    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 0.5rem;
    }
    .title-decor {
      width: 40px;
      height: 3px;
      background-color: var(--accent-gold);
      margin: 0.5rem 0 1.5rem;
    }
    /* 卡片 */
    .card-milan {
      background: var(--white);
      border: none;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      transition: var(--transition-smooth);
      height: 100%;
    }
    .card-milan:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .card-milan .card-body {
      padding: 2rem;
    }
    .icon-circle {
      width: 64px;
      height: 64px;
      background: var(--accent-gold-light);
      color: var(--primary-burgundy);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 28px;
      margin-bottom: 1.25rem;
    }
    .card-milan h3 {
      font-size: 20px;
      font-weight: 600;
      color: var(--text-dark);
    }
    .text-gold-link {
      color: var(--accent-gold);
      font-weight: 500;
      text-decoration: underline;
      text-underline-offset: 2px;
    }
    .text-gold-link:hover {
      color: var(--primary-burgundy);
      text-decoration: none;
    }
    /* 优势数据 */
    .stat-number {
      font-size: 48px;
      font-weight: 700;
      color: var(--accent-gold);
      line-height: 1.2;
    }
    .stat-label {
      font-size: 14px;
      color: var(--text-dark);
    }
    .bg-light-warm {
      background-color: var(--bg-light-gray);
    }
    /* 案例卡片 */
    .case-img {
      aspect-ratio: 16/9;
      object-fit: cover;
      border-radius: var(--radius-card) var(--radius-card) 0 0;
    }
    .chip {
      background: var(--accent-gold-light);
      color: var(--text-dark);
      padding: 4px 14px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 500;
      display: inline-block;
    }
    /* 方案图文 */
    .solution-img {
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
    }
    /* FAQ */
    .accordion-milan .accordion-item {
      background: var(--white);
      border: none;
      border-radius: var(--radius-accordion) !important;
      margin-bottom: 12px;
      box-shadow: var(--shadow-sm);
    }
    .accordion-milan .accordion-button {
      font-size: 16px;
      font-weight: 600;
      color: var(--text-dark);
      background: var(--white);
      border-radius: var(--radius-accordion) !important;
      padding: 1.2rem 1.5rem;
      box-shadow: none;
    }
    .accordion-milan .accordion-button:not(.collapsed) {
      background: var(--white);
      color: var(--primary-burgundy);
    }
    .accordion-milan .accordion-button::after {
      display: none;
    }
    .accordion-indicator {
      width: 10px;
      height: 10px;
      background: var(--accent-gold);
      border-radius: 50%;
      margin-right: 12px;
      transition: var(--transition-smooth);
    }
    .accordion-button:not(.collapsed) .accordion-indicator {
      background: var(--primary-burgundy);
    }
    .accordion-body {
      font-size: 15px;
      line-height: 1.7;
      border-top: 1px solid rgba(58,51,53,0.1);
      padding: 1.2rem 1.5rem;
    }
    /* 联系CTA */
    .contact-section {
      background-color: var(--text-dark);
    }
    .form-control {
      border: 1px solid var(--border-light);
      border-radius: var(--radius-btn);
      padding: 12px 16px;
      background: var(--bg-warm);
    }
    .form-control:focus {
      border-color: var(--accent-gold);
      box-shadow: 0 0 0 0.2rem rgba(200,169,110,0.2);
    }
    /* 页脚 */
    .footer {
      background: var(--text-dark);
      color: rgba(255,255,255,0.8);
    }
    .footer a {
      color: rgba(255,255,255,0.8);
    }
    .footer a:hover {
      color: var(--accent-gold);
    }
    .footer h5 {
      color: white;
      font-weight: 600;
    }
    .copyright {
      font-size: 13px;
      color: rgba(255,255,255,0.5);
    }