/* roulang page: index */
:root {
      --color-primary: #2D2D2D;
      --color-accent: #FF6B35;
      --color-bg: #FAFAF9;
      --color-card-bg: #FFFFFF;
      --color-border: #E6E6E3;
      --color-text-primary: #1A1A1A;
      --color-text-secondary: #5C5C5C;
      --color-text-muted: #8A8A8A;
      --color-footer-bg: #2D2D2D;
      --color-footer-text: #B0B0B0;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      --font-data: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-input: 6px;
      --shadow-card: 0 2px 12px rgba(0,0,0,0.04);
      --shadow-card-hover: 0 8px 24px rgba(0,0,0,0.08);
      --transition-base: all 0.25s ease;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-sans);
      background-color: var(--color-bg);
      color: var(--color-text-primary);
      line-height: 1.6;
      margin: 0;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }
    
    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-weight: 600;
      letter-spacing: -0.3px;
      color: var(--color-primary);
    }
    
    h1 {
      font-size: 44px;
      line-height: 56px;
      letter-spacing: -0.5px;
      font-weight: 700;
    }
    
    h2 {
      font-size: 32px;
      line-height: 42px;
      margin-bottom: 1.5rem;
    }
    
    h3 {
      font-size: 22px;
      line-height: 30px;
      font-weight: 500;
    }
    
    a {
      color: var(--color-primary);
      text-decoration: none;
      transition: var(--transition-base);
    }
    a:hover {
      color: var(--color-accent);
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    .container-custom {
      width: 100%;
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 32px;
      padding-right: 32px;
    }
    
    /* 按钮重置 */
    .btn {
      border-radius: var(--radius-btn);
      padding: 12px 28px;
      font-weight: 500;
      transition: var(--transition-base);
      border: none;
      font-size: 16px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      text-decoration: none;
    }
    .btn-primary-custom {
      background-color: var(--color-accent);
      color: white;
      border: 1px solid var(--color-accent);
    }
    .btn-primary-custom:hover {
      background-color: #E55A2B;
      border-color: #E55A2B;
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(255,107,53,0.25);
      color: white;
    }
    .btn-outline-custom {
      background: transparent;
      color: var(--color-primary);
      border: 1px solid var(--color-primary);
    }
    .btn-outline-custom:hover {
      background: var(--color-primary);
      color: white;
      transform: translateY(-2px);
    }
    
    /* 导航分屏布局 */
    .navbar-custom {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1030;
      transition: background 0.3s ease, box-shadow 0.3s ease;
      background: transparent;
      display: flex;
      height: 80px;
    }
    .navbar-scrolled {
      background: rgba(250,250,249,0.92);
      backdrop-filter: blur(8px);
      box-shadow: 0 4px 20px rgba(0,0,0,0.04);
    }
    .nav-left {
      width: 40%;
      background-color: #FAFAF9;
      display: flex;
      align-items: center;
      padding-left: 48px;
    }
    .nav-right {
      width: 60%;
      background: linear-gradient(135deg, #f5f5f2 0%, #fafaf9 100%);
      display: flex;
      align-items: center;
      justify-content: flex-end;
      padding-right: 48px;
    }
    .logo-text {
      font-weight: 700;
      font-size: 24px;
      color: var(--color-primary);
      letter-spacing: -0.3px;
      display: flex;
      align-items: center;
    }
    .logo-accent {
      color: var(--color-accent);
      margin-left: 4px;
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-link-item {
      font-size: 16px;
      font-weight: 500;
      color: var(--color-text-primary);
      position: relative;
      padding: 4px 0;
      transition: color 0.2s;
    }
    .nav-link-item::after {
      content: '';
      position: absolute;
      bottom: -6px;
      left: 0;
      width: 0;
      height: 3px;
      background: var(--color-accent);
      transition: width 0.3s ease;
      border-radius: 2px;
    }
    .nav-link-item:hover::after,
    .nav-link-item.active::after {
      width: 30px;
    }
    .nav-link-item:hover {
      color: var(--color-accent);
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 28px;
      color: var(--color-primary);
    }
    
    /* Hero 区块 */
    .hero-section {
      display: flex;
      min-height: 100vh;
      align-items: center;
      background: radial-gradient(circle at 80% 20%, rgba(245,245,242,0.6) 0%, #FAFAF9 70%);
      padding-top: 80px;
    }
    .hero-left {
      width: 40%;
      padding-left: 48px;
      padding-right: 20px;
    }
    .hero-right {
      width: 60%;
      height: 100%;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      min-height: 500px;
      background-repeat: no-repeat;
      position: relative;
    }
    .highlight {
      color: var(--color-accent);
    }
    
    /* 通用板块 */
    .section-padding {
      padding: 100px 0;
    }
    .section-title {
      margin-bottom: 56px;
    }
    
    /* 服务错位栅格 */
    .service-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 32px;
    }
    .service-card {
      background: var(--color-card-bg);
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-card);
      transition: var(--transition-base);
      border-left: 4px solid var(--color-accent);
      display: flex;
      flex-direction: column;
    }
    .service-card:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-4px);
    }
    .service-icon {
      font-size: 32px;
      color: var(--color-primary);
      margin-bottom: 20px;
    }
    .w-55 { width: calc(55% - 16px); }
    .w-45 { width: calc(45% - 16px); }
    
    /* 优势数字 */
    .stats-scroll {
      display: flex;
      gap: 48px;
      overflow-x: auto;
      padding: 20px 0;
      background: linear-gradient(90deg, #f7f7f5 0%, #fcfcfb 100%);
      border-radius: 16px;
      padding: 32px 48px;
    }
    .stat-item {
      min-width: 180px;
      text-align: center;
    }
    .stat-number {
      font-family: var(--font-data);
      font-size: 48px;
      font-weight: 700;
      color: var(--color-primary);
    }
    
    /* 案例卡片 */
    .case-card {
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: var(--transition-base);
    }
    .case-card:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-4px);
    }
    .case-img {
      height: 240px;
      object-fit: cover;
      width: 100%;
      transition: transform 0.4s;
    }
    .case-card:hover .case-img {
      transform: scale(1.04);
    }
    
    /* Tab 方案 */
    .nav-tabs-custom .nav-link {
      border: none;
      color: var(--color-text-secondary);
      font-weight: 500;
      padding: 12px 24px;
      border-radius: 8px 8px 0 0;
    }
    .nav-tabs-custom .nav-link.active {
      background: white;
      color: var(--color-accent);
      border-bottom: 3px solid var(--color-accent);
    }
    
    /* FAQ */
    .accordion-custom .accordion-button {
      font-weight: 600;
      box-shadow: none;
      background: white;
    }
    .accordion-custom .accordion-button:not(.collapsed) {
      color: var(--color-accent);
      background: #fdfdfd;
    }
    
    /* 表单 */
    .form-control-custom {
      border-radius: var(--radius-input);
      border: 1px solid #D9D9D9;
      padding: 14px 16px;
      font-size: 16px;
    }
    .form-control-custom:focus {
      border-color: var(--color-accent);
      box-shadow: none;
      outline: none;
    }
    
    /* 页脚 */
    .footer-custom {
      background: var(--color-footer-bg);
      color: var(--color-footer-text);
      padding: 60px 0 30px;
    }
    
    @media (max-width: 1199px) {
      .nav-left, .nav-right {
        width: 50%;
        padding-left: 24px;
        padding-right: 24px;
      }
      .hero-left { width: 45%; padding-left: 32px; }
      .hero-right { width: 55%; }
    }
    @media (max-width: 991px) {
      .navbar-custom {
        background: #FAFAF9;
        box-shadow: 0 2px 12px rgba(0,0,0,0.04);
        display: flex;
        justify-content: space-between;
        padding: 0 24px;
      }
      .nav-left, .nav-right { width: auto; background: transparent; }
      .nav-links { display: none; }
      .mobile-menu-btn { display: block; }
      .hero-section { flex-direction: column; padding-top: 90px; }
      .hero-left, .hero-right { width: 100%; padding: 32px; }
      .hero-right { min-height: 350px; }
      .w-55, .w-45 { width: 100%; }
    }
    @media (max-width: 767px) {
      h1 { font-size: 36px; line-height: 44px; }
      .section-padding { padding: 70px 0; }
    }