/* roulang page: index */
:root {
      --deep-purple: #3D2B4F;
      --champagne: #C9A96E;
      --warm-bg: #FAF8F6;
      --card-white: #FFFFFF;
      --amber-orange: #D98C2E;
      --title-dark: #1E1A24;
      --body-text: #4A4458;
      --muted-text: #7B7485;
      --gradient-main: linear-gradient(135deg, #3D2B4F 0%, #5C3D4A 100%);
      --shadow-card: 0 4px 20px rgba(61, 43, 79, 0.06);
      --shadow-hover: 0 12px 32px rgba(61, 43, 79, 0.12);
      --border-light: #E0DCD5;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      --font-number: "Inter", "SF Pro Display", sans-serif;
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 8px;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--warm-bg);
      color: var(--body-text);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-weight: 600;
      color: var(--title-dark);
      letter-spacing: -0.3px;
    }
    h1 {
      font-size: 2.8rem;
      font-weight: 700;
    }
    h2 {
      font-size: 2.2rem;
      font-weight: 600;
    }
    .section-subtitle {
      color: var(--muted-text);
      font-size: 1.1rem;
      max-width: 700px;
      margin: 0 auto;
    }
    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航 */
    .navbar-custom {
      background-color: rgba(255,255,255,0.98);
      backdrop-filter: blur(10px);
      height: 72px;
      box-shadow: 0 4px 12px rgba(0,0,0,0.02);
      position: sticky;
      top: 0;
      z-index: 1020;
      display: flex;
      align-items: center;
    }
    .navbar-brand-custom {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--deep-purple) !important;
      letter-spacing: 0.5px;
    }
    .nav-link-custom {
      font-weight: 500;
      color: var(--body-text) !important;
      margin: 0 0.8rem;
      padding: 0.5rem 0.2rem;
      position: relative;
      transition: 0.2s;
      font-size: 0.95rem;
    }
    .nav-link-custom:hover {
      color: var(--deep-purple) !important;
    }
    .nav-link-custom.active {
      color: var(--deep-purple) !important;
    }
    .nav-link-custom.active::after {
      content: "";
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 3px;
      background-color: var(--champagne);
      border-radius: 2px;
    }
    .navbar-toggler {
      border: none;
      color: var(--deep-purple);
      font-size: 1.5rem;
    }
    .offcanvas {
      background-color: white;
    }
    .offcanvas .nav-link-custom {
      font-size: 1.2rem;
      margin: 0.8rem 0;
    }
    /* 按钮 */
    .btn-primary-custom {
      background: var(--gradient-main);
      border: none;
      color: white;
      font-weight: 600;
      padding: 0.8rem 2rem;
      border-radius: var(--radius-md);
      transition: all 0.25s ease;
      display: inline-block;
      text-decoration: none;
      box-shadow: 0 8px 18px rgba(61,43,79,0.18);
    }
    .btn-primary-custom:hover {
      transform: scale(1.03);
      box-shadow: 0 12px 24px rgba(61,43,79,0.28);
      color: white;
    }
    .btn-outline-custom {
      background: transparent;
      border: 2px solid var(--champagne);
      color: var(--champagne);
      font-weight: 600;
      padding: 0.65rem 1.8rem;
      border-radius: var(--radius-md);
      transition: all 0.25s ease;
      text-decoration: none;
      display: inline-block;
    }
    .btn-outline-custom:hover {
      background-color: var(--champagne);
      color: white;
      transform: scale(1.03);
    }
    /* Hero */
    .hero-section {
      background: var(--gradient-main);
      position: relative;
      overflow: hidden;
      padding: 80px 0;
      color: white;
      min-height: 70vh;
      display: flex;
      align-items: center;
    }
    .hero-overlay-pattern {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-image: radial-gradient(circle, rgba(255,255,255,0.05) 1px, transparent 1px);
      background-size: 24px 24px;
      opacity: 0.4;
    }
    .hero-title {
      font-size: 3.2rem;
      font-weight: 700;
      color: white;
      line-height: 1.3;
    }
    .hero-sub {
      color: rgba(255,255,240,0.9);
      font-size: 1.25rem;
      margin: 1.5rem 0 2rem;
    }
    .badge-metric {
      background: rgba(255,255,255,0.12);
      backdrop-filter: blur(8px);
      border-radius: var(--radius-md);
      padding: 1rem 1.5rem;
      text-align: center;
      color: white;
    }
    .badge-number {
      font-family: var(--font-number);
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--amber-orange);
    }
    .hero-image-col img {
      border-radius: 24px;
      box-shadow: 0 20px 35px rgba(0,0,0,0.3);
      max-width: 100%;
    }
    /* 区块间距 */
    .section-padding {
      padding: 100px 0;
    }
    /* 数据看板 */
    .metrics-panel {
      background: #F5F3F0;
      border-radius: var(--radius-lg);
      padding: 2rem 1rem;
    }
    .metric-item i {
      color: var(--champagne);
      font-size: 2rem;
      margin-bottom: 0.5rem;
    }
    .metric-digit {
      font-family: var(--font-number);
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--amber-orange);
    }
    /* 服务卡片 */
    .service-card {
      background: var(--card-white);
      border-radius: var(--radius-lg);
      padding: 2rem;
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
      height: 100%;
      border: none;
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .service-icon {
      font-size: 2.4rem;
      color: var(--champagne);
      margin-bottom: 1.2rem;
    }
    .tag-pill {
      background: #F0EBE3;
      color: var(--deep-purple);
      border-radius: 20px;
      padding: 0.25rem 0.9rem;
      font-size: 0.8rem;
      font-weight: 600;
      display: inline-block;
      margin-right: 0.4rem;
    }
    /* 案例对比 */
    .compare-card {
      border-radius: var(--radius-lg);
      padding: 2rem;
      height: 100%;
    }
    .compare-before {
      background: #EDE9E4;
    }
    .compare-after {
      background: var(--gradient-main);
      color: white;
    }
    /* FAQ */
    .accordion-faq .accordion-item {
      border: none;
      background: white;
      border-radius: var(--radius-md) !important;
      margin-bottom: 12px;
      box-shadow: 0 2px 10px rgba(0,0,0,0.02);
    }
    .accordion-faq .accordion-button {
      font-weight: 600;
      font-size: 1.1rem;
      color: var(--title-dark);
      background: white;
      box-shadow: none;
      border-radius: var(--radius-md) !important;
      padding: 1.3rem 1.5rem;
    }
    .accordion-faq .accordion-button:not(.collapsed) {
      border-left: 4px solid var(--champagne);
      background-color: #FAF8F6;
    }
    /* 表单 */
    .form-control-custom {
      border: 1px solid var(--border-light);
      border-radius: 10px;
      padding: 0.8rem 1rem;
      font-size: 1rem;
      transition: 0.2s;
    }
    .form-control-custom:focus {
      border-color: var(--champagne);
      box-shadow: 0 0 0 3px rgba(201,169,110,0.2);
    }
    .contact-info-box {
      background: #F5F1EB;
      border-radius: var(--radius-lg);
      padding: 2rem;
    }
    /* 页脚 */
    .footer-custom {
      background: var(--deep-purple);
      color: #D9D0E0;
      padding: 3rem 0 1.5rem;
    }
    .footer-custom a {
      color: #D9D0E0;
      text-decoration: none;
      transition: 0.2s;
    }
    .footer-custom a:hover {
      color: var(--champagne);
    }
    @media (max-width: 768px) {
      h1 { font-size: 2.2rem; }
      .hero-title { font-size: 2.2rem; }
      .section-padding { padding: 60px 0; }
    }