/* roulang page: index */
:root {
      --primary-deep: #2A2F3B;
      --accent-orange: #FF6B4A;
      --bg-warm: #F9F8F6;
      --white: #FFFFFF;
      --text-dark: #1A1C21;
      --text-body: #4A4F59;
      --text-light: #E0E3E8;
      --border-light: #F0F1F3;
      --shadow-sm: 0 8px 30px rgba(0, 0, 0, 0.04);
      --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.08);
      --radius-lg: 16px;
      --radius-pill: 50px;
      --transition: all 0.25s ease;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-warm);
      color: var(--text-body);
      line-height: 1.7;
      margin: 0;
      overflow-x: hidden;
    }

    h1, h2, h3, h4, h5, h6 {
      color: var(--text-dark);
      font-weight: 600;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    /* 容器微调 */
    .container-custom {
      max-width: 1140px;
      margin: 0 auto;
      padding-left: 15px;
      padding-right: 15px;
    }

    /* 按钮系统 */
    .btn-primary-custom {
      background-color: var(--accent-orange);
      border: none;
      color: var(--white);
      border-radius: var(--radius-pill);
      padding: 0.75rem 2.5rem;
      font-weight: 600;
      transition: var(--transition);
      display: inline-block;
      text-align: center;
      box-shadow: 0 4px 10px rgba(255, 107, 74, 0.2);
    }
    .btn-primary-custom:hover {
      background-color: #E55A3D;
      box-shadow: 0 6px 18px rgba(255, 107, 74, 0.4);
      color: white;
      transform: translateY(-2px);
    }
    .btn-outline-custom {
      background: transparent;
      border: 2px solid var(--primary-deep);
      color: var(--primary-deep);
      border-radius: var(--radius-pill);
      padding: 0.65rem 2.2rem;
      font-weight: 600;
      transition: var(--transition);
      display: inline-block;
    }
    .btn-outline-custom:hover {
      background-color: var(--primary-deep);
      color: white;
    }

    /* 导航头部 */
    #header {
      position: sticky;
      top: 0;
      z-index: 1050;
      background: rgba(249, 248, 246, 0.85);
      backdrop-filter: blur(12px);
      box-shadow: 0 4px 20px rgba(0,0,0,0.02);
      transition: var(--transition);
    }
    .navbar-brand-custom {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--primary-deep);
      letter-spacing: -0.5px;
    }
    .navbar-brand-custom span {
      color: var(--accent-orange);
    }
    .nav-pills-custom .nav-link {
      color: var(--text-body);
      font-weight: 500;
      padding: 0.5rem 1.1rem;
      border-radius: 30px;
      margin: 0 0.15rem;
      transition: var(--transition);
    }
    .nav-pills-custom .nav-link.active,
    .nav-pills-custom .nav-link:hover {
      background-color: rgba(255, 107, 74, 0.08);
      color: var(--accent-orange);
      font-weight: 600;
    }
    .search-icon {
      font-size: 1.2rem;
      color: var(--primary-deep);
      cursor: pointer;
      margin-right: 1.5rem;
    }

    /* Hero */
    #hero {
      padding: 3rem 0 5rem;
      background: linear-gradient(180deg, #ffffff 0%, var(--bg-warm) 100%);
    }
    .hero-title {
      font-size: 3.5rem;
      font-weight: 700;
      letter-spacing: -0.5px;
      line-height: 1.2;
      color: var(--text-dark);
    }
    .hero-sub {
      font-size: 1.2rem;
      color: var(--text-body);
      margin: 1.5rem 0 2rem;
    }
    .badge-data {
      background: white;
      border-radius: 16px;
      padding: 0.6rem 1.2rem;
      box-shadow: var(--shadow-sm);
      display: inline-flex;
      align-items: center;
      gap: 0.6rem;
      font-weight: 600;
      color: var(--text-dark);
      margin-right: 0.8rem;
      margin-bottom: 0.8rem;
    }
    .badge-data i {
      color: var(--accent-orange);
      font-size: 1.4rem;
    }
    .hero-img {
      border-radius: 32px;
      box-shadow: var(--shadow-hover);
      width: 100%;
      height: auto;
      object-fit: cover;
    }

    /* 通用区块 */
    section {
      padding: 5rem 0;
    }
    .section-title {
      font-size: 2.25rem;
      font-weight: 600;
      letter-spacing: -0.3px;
      margin-bottom: 0.75rem;
      color: var(--text-dark);
    }
    .section-sub {
      color: var(--text-body);
      font-size: 1.1rem;
      margin-bottom: 3rem;
    }

    /* 卡片样式 */
    .card-custom {
      background: var(--white);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      padding: 2rem;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      height: 100%;
    }
    .card-custom:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }
    .icon-accent {
      color: var(--accent-orange);
      font-size: 2rem;
      margin-bottom: 1rem;
      display: inline-block;
    }

    /* 服务矩阵非对称 */
    .service-main-img {
      border-radius: var(--radius-lg);
      height: 100%;
      object-fit: cover;
      min-height: 280px;
      width: 100%;
    }
    .service-card-side {
      background: white;
      border-radius: var(--radius-lg);
      padding: 1.8rem;
      box-shadow: var(--shadow-sm);
      margin-bottom: 1.5rem;
    }
    .badge-metric {
      background: var(--accent-orange);
      color: white;
      border-radius: 30px;
      padding: 0.25rem 1.1rem;
      font-weight: 600;
      font-size: 0.9rem;
      display: inline-block;
    }

    /* 深色看板 */
    .dashboard-section {
      background: linear-gradient(145deg, #2A2F3B 0%, #1B1E24 100%);
      border-radius: 32px;
      padding: 4rem 2rem;
      color: white;
    }
    .metric-card {
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(6px);
      border-radius: 24px;
      padding: 1.8rem 1.2rem;
      text-align: center;
      color: white;
      border: 1px solid rgba(255,255,255,0.1);
    }
    .metric-value {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--accent-orange);
      line-height: 1.2;
    }
    .chart-placeholder {
      background: rgba(255,107,74,0.2);
      height: 8px;
      border-radius: 4px;
      width: 80%;
      margin: 0.8rem auto;
      position: relative;
    }

    /* 对比区块 */
    .compare-card-old {
      background: #f2f2f2;
      border-radius: 20px;
      padding: 2rem;
      color: #6b6b6b;
    }
    .compare-card-new {
      background: white;
      border: 2px solid var(--accent-orange);
      border-radius: 20px;
      padding: 2rem;
      box-shadow: 0 15px 30px rgba(255,107,74,0.1);
    }

    /* FAQ */
    .accordion-button:not(.collapsed) {
      background-color: rgba(255,107,74,0.04);
      color: var(--accent-orange);
      font-weight: 600;
    }
    .accordion-button:focus {
      box-shadow: none;
      border-color: var(--accent-orange);
    }

    /* 联系表单 */
    .contact-card {
      background: linear-gradient(135deg, #2A2F3B 0%, #1f232b 100%);
      border-radius: 32px;
      padding: 3rem;
      color: white;
    }
    .form-control-custom {
      background: transparent;
      border: none;
      border-bottom: 2px solid rgba(255,255,255,0.3);
      border-radius: 0;
      color: white;
      padding: 0.6rem 0.2rem;
      margin-bottom: 1.5rem;
    }
    .form-control-custom:focus {
      background: transparent;
      border-bottom-color: var(--accent-orange);
      box-shadow: none;
      color: white;
    }
    .btn-submit {
      background: var(--accent-orange);
      border: none;
      border-radius: 40px;
      padding: 0.8rem 2.2rem;
      font-weight: 700;
      width: 100%;
    }

    footer {
      background: #1B1E24;
      color: #9ca0a8;
      padding: 3rem 0 1.5rem;
    }

    @media (max-width: 992px) {
      .hero-title { font-size: 2.8rem; }
      .dashboard-section { padding: 2.5rem 1rem; }
    }
    @media (max-width: 768px) {
      .hero-title { font-size: 2.2rem; }
      .nav-pills-custom { flex-wrap: nowrap; overflow-x: auto; white-space: nowrap; }
      .contact-card { padding: 2rem; }
    }