/* roulang page: index */
:root {
      --primary-red: #E8380F;
      --primary-red-dark: #C42A08;
      --deep-navy: #1A1A2E;
      --bg-warm: #F5F5F0;
      --gold: #FFB800;
      --gold-light: #FFCC00;
      --text-title: #1A1A2E;
      --text-body: #3A3A3A;
      --text-muted: #6c6c6c;
      --white: #FFFFFF;
      --card-bg: #FFFFFF;
      --card-hover-bg: #FFF8F5;
      --border-light: rgba(0,0,0,0.04);
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-hover: 0 12px 32px rgba(232,56,15,0.12);
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
      --font-body: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
      --font-number: 'DIN Alternate', 'Oswald', 'PingFang SC', sans-serif;
      --transition: 0.25s ease;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-body);
      background-color: var(--bg-warm);
      color: var(--text-body);
      line-height: 1.8;
      margin: 0;
      padding: 0;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    
    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-family: var(--font-heading);
      color: var(--text-title);
      font-weight: 700;
    }
    
    h1 {
      font-size: 54px;
      line-height: 1.2;
      letter-spacing: -0.5px;
    }
    
    h2 {
      font-size: 40px;
      line-height: 1.3;
      margin-bottom: 1.5rem;
    }
    
    h3 {
      font-size: 22px;
      line-height: 1.4;
      font-weight: 600;
    }
    
    .section-title {
      position: relative;
      display: inline-block;
      margin-bottom: 2.5rem;
    }
    
    .section-title::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -10px;
      width: 60px;
      height: 4px;
      background: var(--primary-red);
      border-radius: 2px;
    }
    
    .container-custom {
      max-width: 1320px;
      margin: 0 auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    
    /* 导航栏 - 搜索主导型 */
    .navbar-custom {
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(0,0,0,0.05);
      padding: 0.8rem 0;
      position: sticky;
      top: 0;
      z-index: 1030;
      box-shadow: 0 4px 20px rgba(0,0,0,0.02);
    }
    
    .navbar-brand-custom {
      font-family: var(--font-heading);
      font-weight: 700;
      font-size: 1.8rem;
      color: var(--deep-navy) !important;
      display: flex;
      align-items: center;
      gap: 8px;
      text-decoration: none;
    }
    
    .navbar-brand-custom i {
      color: var(--primary-red);
      font-size: 2rem;
    }
    
    .search-group {
      max-width: 380px;
      width: 100%;
    }
    
    .search-input {
      border-radius: 50px !important;
      border: 1px solid rgba(0,0,0,0.08);
      padding-left: 1.2rem;
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
      background: var(--white);
      font-size: 0.95rem;
    }
    
    .search-input:focus {
      border-color: var(--primary-red);
      box-shadow: 0 2px 12px rgba(232,56,15,0.15);
    }
    
    .search-btn {
      border-radius: 50px !important;
      background: var(--primary-red);
      border: none;
      color: white;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
      font-weight: 600;
    }
    
    .search-btn:hover {
      background: var(--primary-red-dark);
      color: white;
    }
    
    .nav-link-custom {
      font-weight: 600;
      color: var(--text-title) !important;
      margin: 0 0.5rem;
      transition: var(--transition);
      font-size: 1rem;
    }
    
    .nav-link-custom:hover {
      color: var(--primary-red) !important;
    }
    
    .offcanvas-menu {
      background: var(--white);
    }
    
    /* 按钮系统 */
    .btn-primary-custom {
      background: var(--primary-red);
      border: none;
      color: white;
      font-weight: 700;
      border-radius: var(--radius-md);
      padding: 0.75rem 2rem;
      transition: var(--transition);
      box-shadow: 0 4px 12px rgba(232,56,15,0.2);
      font-size: 1rem;
    }
    
    .btn-primary-custom:hover {
      background: var(--primary-red-dark);
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(232,56,15,0.3);
      color: white;
    }
    
    .btn-outline-custom {
      background: transparent;
      border: 2px solid var(--primary-red);
      color: var(--primary-red);
      font-weight: 700;
      border-radius: var(--radius-md);
      padding: 0.75rem 2rem;
      transition: var(--transition);
    }
    
    .btn-outline-custom:hover {
      background: #FFF0EC;
      border-color: var(--primary-red-dark);
      color: var(--primary-red-dark);
      transform: translateY(-2px);
    }
    
    .btn-gold {
      background: linear-gradient(135deg, #FFB800, #FF9500);
      border: none;
      color: #1A1A2E;
      font-weight: 700;
      border-radius: 50px;
      padding: 0.85rem 2.5rem;
      font-size: 1.1rem;
      transition: var(--transition);
      box-shadow: 0 8px 18px rgba(255,184,0,0.3);
    }
    
    .btn-gold:hover {
      background: linear-gradient(135deg, #FFCC00, #FFB800);
      transform: translateY(-2px);
      box-shadow: 0 12px 24px rgba(255,184,0,0.4);
      color: #1A1A2E;
    }
    
    /* Hero */
    .hero-section {
      min-height: 620px;
      background: linear-gradient(135deg, #E8380F 0%, #D62C0A 40%, #1A1A2E 100%);
      display: flex;
      align-items: center;
      position: relative;
      overflow: hidden;
    }
    
    .hero-content {
      position: relative;
      z-index: 2;
    }
    
    .hero-image-area {
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      border-radius: 24px;
      min-height: 400px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.3);
    }
    
    .hero-image-area::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: linear-gradient(135deg, rgba(232,56,15,0.2) 0%, transparent 70%);
      border-radius: 24px;
    }
    
    .floating-badge {
      position: absolute;
      bottom: 20px;
      right: 20px;
      background: rgba(0,0,0,0.7);
      backdrop-filter: blur(8px);
      border: 2px solid var(--gold);
      color: var(--gold);
      padding: 0.5rem 1.5rem;
      border-radius: 50px;
      font-weight: 700;
      font-size: 1.2rem;
    }
    
    /* 数据徽章 */
    .stat-number {
      font-family: var(--font-number);
      font-size: 48px;
      font-weight: 700;
      color: var(--primary-red);
      line-height: 1.1;
    }
    
    .gold-dot {
      color: var(--gold);
      font-size: 1.5rem;
      margin-left: 5px;
    }
    
    /* 卡片 */
    .service-card {
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      border: none;
      height: 100%;
    }
    
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      background: var(--card-hover-bg);
    }
    
    .service-card-img {
      height: 200px;
      background-size: cover;
      background-position: center;
      position: relative;
    }
    
    .icon-overlay {
      position: absolute;
      bottom: 15px;
      left: 15px;
      background: rgba(255,255,255,0.9);
      width: 48px;
      height: 48px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-red);
      font-size: 1.5rem;
    }
    
    .case-card {
      border-radius: var(--radius-lg);
      overflow: hidden;
      position: relative;
      min-height: 280px;
      background-size: cover;
      background-position: center;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    
    .case-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    
    .case-overlay {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      background: linear-gradient(transparent, rgba(0,0,0,0.8));
      padding: 2rem 1.5rem 1.5rem;
      color: white;
    }
    
    /* 解决方案交替 */
    .solution-img {
      background-size: cover;
      background-position: center;
      min-height: 320px;
      border-radius: var(--radius-lg);
    }
    
    /* FAQ */
    .accordion-custom .accordion-button {
      font-weight: 600;
      font-size: 18px;
      color: var(--text-title);
      background: transparent;
      box-shadow: none;
      border-bottom: 1px solid rgba(0,0,0,0.05);
      padding: 1.2rem 0;
    }
    
    .accordion-custom .accordion-button:not(.collapsed) {
      color: var(--primary-red);
      background: transparent;
    }
    
    .accordion-custom .accordion-button::after {
      background-image: none;
      content: '+';
      font-size: 1.8rem;
      font-weight: 400;
      color: var(--primary-red);
      display: flex;
      align-items: center;
      justify-content: center;
    }
    
    .accordion-custom .accordion-button:not(.collapsed)::after {
      content: '−';
    }
    
    /* CTA */
    .cta-section {
      background: var(--deep-navy);
    }
    
    .email-input {
      border-radius: 50px;
      padding: 0.9rem 1.8rem;
      border: none;
      background: white;
    }
    
    /* Footer */
    .footer-custom {
      background: var(--deep-navy);
      color: #CCCCCC;
    }
    
    .footer-custom a {
      color: #CCCCCC;
      text-decoration: none;
      transition: var(--transition);
    }
    
    .footer-custom a:hover {
      color: var(--gold);
    }
    
    @media (max-width: 992px) {
      h1 { font-size: 42px; }
      h2 { font-size: 34px; }
      .search-group { max-width: 240px; }
    }
    
    @media (max-width: 768px) {
      h1 { font-size: 32px; }
      h2 { font-size: 28px; }
      .hero-image-area { min-height: 250px; }
      .navbar-brand-custom { font-size: 1.5rem; }
      .search-group { max-width: 100%; margin-top: 1rem; }
    }