/* roulang page: index */
:root {
      --bs-primary: #F15A24;
      --bs-primary-dark: #D94A1A;
      --bs-secondary: #2D2A26;
      --bs-body-bg: #FFF8F3;
      --bs-body-color: #5A5550;
      --bs-light-gray: #8A8580;
      --bs-accent: #FFB347;
      --bs-success: #2E8B57;
      --bs-card-bg: #ffffff;
      --bs-border-color: #E0DCD7;
      --bs-shadow-sm: 0 4px 12px rgba(45,42,38,0.06);
      --bs-shadow-hover: 0 8px 24px rgba(45,42,38,0.12);
      --bs-radius-card: 12px;
      --bs-radius-btn: 8px;
      --bs-radius-input: 6px;
      --font-heading: 'Noto Sans SC', system-ui, -apple-system, 'Segoe UI', sans-serif;
      --font-body: 'Noto Sans SC', system-ui, -apple-system, 'Segoe UI', sans-serif;
      --font-number: 'Oswald', 'DIN Alternate', 'Noto Sans SC', sans-serif;
      --section-gap: 80px;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-body);
      background-color: var(--bs-body-bg);
      color: var(--bs-body-color);
      line-height: 1.7;
      font-weight: 400;
      margin: 0;
      padding-top: 80px;
    }

    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-family: var(--font-heading);
      font-weight: 700;
      color: var(--bs-secondary);
      letter-spacing: -0.02em;
    }

    h1 {
      font-size: 2.25rem;
    }
    h2 {
      font-size: 1.75rem;
      margin-bottom: 1.5rem;
      position: relative;
      display: inline-block;
    }
    h2:after {
      content: '';
      position: absolute;
      bottom: -8px;
      left: 0;
      width: 60%;
      height: 3px;
      background: var(--bs-primary);
      border-radius: 2px;
    }
    h3 {
      font-size: 1.25rem;
    }

    .container-custom {
      max-width: 1140px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 导航栏 */
    .navbar {
      background: rgba(255, 248, 243, 0.92);
      backdrop-filter: blur(8px);
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
      padding: 12px 0;
      transition: all 0.2s;
    }
    .navbar-brand {
      font-family: var(--font-heading);
      font-weight: 700;
      font-size: 1.6rem;
      color: var(--bs-secondary) !important;
    }
    .navbar-brand span {
      color: var(--bs-primary);
    }
    .nav-link {
      color: var(--bs-secondary) !important;
      font-weight: 600;
      margin: 0 8px;
      transition: color 0.2s;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--bs-primary) !important;
    }
    .btn-primary-custom {
      background: var(--bs-primary);
      border: none;
      color: white;
      font-weight: 600;
      padding: 10px 24px;
      border-radius: var(--bs-radius-btn);
      transition: all 0.25s;
      box-shadow: 0 4px 10px rgba(241,90,36,0.25);
    }
    .btn-primary-custom:hover {
      background: var(--bs-primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 8px 18px rgba(241,90,36,0.35);
      color: white;
    }
    .btn-outline-custom {
      border: 2px solid var(--bs-primary);
      color: var(--bs-primary);
      background: transparent;
      font-weight: 600;
      padding: 8px 24px;
      border-radius: var(--bs-radius-btn);
      transition: 0.25s;
    }
    .btn-outline-custom:hover {
      background: var(--bs-primary);
      color: white;
      border-color: var(--bs-primary);
    }
    .badge-accent {
      background: var(--bs-accent);
      color: #2D2A26;
      font-size: 0.75rem;
      padding: 4px 12px;
      border-radius: 20px;
      font-weight: 600;
      animation: pulse 2s infinite;
    }
    @keyframes pulse {
      0% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.9; transform: scale(1.03); }
      100% { opacity: 1; transform: scale(1); }
    }

    /* Hero */
    #hero {
      padding: 60px 0 80px;
    }
    .hero-title {
      font-size: 2.8rem;
      font-weight: 700;
      line-height: 1.2;
      color: var(--bs-secondary);
    }
    .hero-img {
      border-radius: 16px;
      box-shadow: var(--bs-shadow-hover);
      width: 100%;
      height: auto;
      object-fit: cover;
      animation: float 6s ease-in-out infinite;
    }
    @keyframes float {
      0% { transform: translateY(0px); }
      50% { transform: translateY(-8px); }
      100% { transform: translateY(0px); }
    }

    /* 卡片通用 */
    .card-custom {
      background: white;
      border: none;
      border-radius: var(--bs-radius-card);
      box-shadow: var(--bs-shadow-sm);
      padding: 24px;
      transition: all 0.3s;
      height: 100%;
    }
    .card-custom:hover {
      box-shadow: var(--bs-shadow-hover);
      transform: translateY(-4px);
    }
    .icon-circle {
      width: 64px;
      height: 64px;
      background: rgba(241,90,36,0.1);
      border-radius: 18px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 2rem;
      color: var(--bs-primary);
      margin-bottom: 18px;
    }

    .product-card {
      background: white;
      border-radius: var(--bs-radius-card);
      box-shadow: var(--bs-shadow-sm);
      overflow: hidden;
      transition: 0.3s;
      min-width: 260px;
    }
    .product-card:hover {
      box-shadow: var(--bs-shadow-hover);
    }
    .product-card img {
      height: 180px;
      object-fit: cover;
      transition: transform 0.4s;
    }
    .product-card:hover img {
      transform: scale(1.05);
    }
    .tag-hot {
      background: var(--bs-accent);
      color: #2D2A26;
      font-weight: 600;
      font-size: 0.7rem;
      padding: 3px 10px;
      border-radius: 4px;
    }

    .case-number {
      font-family: var(--font-number);
      font-size: 2rem;
      font-weight: 700;
      color: var(--bs-success);
    }

    .compare-card-right {
      background: #FFF3EB;
      border: 2px solid var(--bs-primary);
      border-radius: var(--bs-radius-card);
    }
    .fa-check {
      color: var(--bs-primary);
    }
    .fa-times {
      color: #aaa;
    }

    .accordion-button:not(.collapsed) {
      background-color: #ffffff;
      color: var(--bs-primary);
      box-shadow: none;
      border-left: 4px solid var(--bs-primary);
    }
    .accordion-button {
      font-weight: 600;
      background: #FFF8F3;
    }

    .cta-section {
      background: linear-gradient(135deg, #F15A24 0%, #FF8C42 100%);
      border-radius: 24px;
      padding: 48px;
      color: white;
    }
    .footer {
      background: #2D2A26;
      color: #8A8580;
      padding: 40px 0 20px;
    }
    .footer a {
      color: #ccc;
      text-decoration: none;
    }
    .footer a:hover {
      color: var(--bs-accent);
    }

    @media (max-width: 768px) {
      body { padding-top: 70px; }
      h1 { font-size: 1.8rem; }
      .hero-title { font-size: 2rem; }
      .navbar-collapse { background: rgba(255,248,243,0.98); padding: 20px; border-radius: 12px; }
    }