/* roulang page: index */
/* 自定义设计变量（覆盖 Bootstrap） */
    :root {
      --bs-primary: #6C5CE7;
      --bs-primary-rgb: 108, 92, 231;
      --bs-secondary: #00CEC9;
      --bs-secondary-rgb: 0, 206, 201;
      --bs-dark: #2D3436;
      --bs-light: #F9F9F9;
      --bs-body-color: #2D3436;
      --bs-body-bg: #FFFFFF;
      --bs-border-radius: 12px;
      --bs-btn-border-radius: 50px;
      --bs-box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
      --bs-box-shadow-lg: 0 12px 28px rgba(108, 92, 231, 0.15);
    }

    /* 基础重置 */
    *,
    *::before,
    *::after {
      box-sizing: border-box;
    }

    body {
      font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
      font-size: 1rem;
      line-height: 1.6;
      color: var(--bs-body-color);
      background-color: var(--bs-body-bg);
      overflow-x: hidden;
    }

    a {
      color: var(--bs-primary);
      text-decoration: none;
      transition: color 0.2s ease;
    }

    a:hover {
      color: #00CEC9;
    }

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

    section {
      padding-top: 5rem;
      padding-bottom: 5rem;
    }

    .section-alt {
      background-color: var(--bs-light);
    }

    /* 自定义容器 */
    .container-custom {
      max-width: 1140px;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }

    /* 极简导航 */
    .navbar-custom {
      padding-top: 1.5rem;
      padding-bottom: 1.5rem;
      background-color: rgba(255, 255, 255, 0.97);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid #EDEDED;
      transition: all 0.3s ease;
    }

    .navbar-custom.scrolled {
      padding-top: 1rem;
      padding-bottom: 1rem;
      box-shadow: var(--bs-box-shadow);
    }

    .navbar-brand {
      font-weight: 700;
      font-size: 1.8rem;
      color: var(--bs-dark);
      display: flex;
      align-items: center;
    }

    .navbar-brand .logo-accent {
      color: var(--bs-primary);
    }

    .nav-link {
      font-weight: 500;
      color: var(--bs-dark);
      margin-left: 0.5rem;
      margin-right: 0.5rem;
      padding: 0.5rem 1rem;
      border-radius: 8px;
      transition: all 0.2s ease;
    }

    .nav-link:hover,
    .nav-link.active {
      color: var(--bs-primary);
      background-color: rgba(108, 92, 231, 0.05);
    }

    .nav-link.active {
      position: relative;
    }

    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: -5px;
      left: 50%;
      transform: translateX(-50%);
      width: 20px;
      height: 3px;
      background-color: var(--bs-secondary);
      border-radius: 2px;
    }

    .navbar-toggler {
      border: none;
      padding: 0.5rem;
      color: var(--bs-dark);
    }

    .navbar-toggler:focus {
      box-shadow: none;
      outline: 2px solid var(--bs-secondary);
    }

    /* Hero 首屏 */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: linear-gradient(rgba(30, 39, 46, 0.85), rgba(44, 62, 80, 0.9)), url('/assets/images/backpic/back-1.webp') no-repeat center center / cover;
      color: white;
      padding-top: 6rem;
    }

    .hero-title {
      font-size: 3.2rem;
      font-weight: 700;
      margin-bottom: 1.5rem;
      line-height: 1.2;
    }

    .hero-subtitle {
      font-size: 1.25rem;
      margin-bottom: 2.5rem;
      opacity: 0.9;
      max-width: 600px;
    }

    /* 按钮定制 */
    .btn-primary-custom {
      background-color: var(--bs-secondary);
      border-color: var(--bs-secondary);
      color: white;
      border-radius: var(--bs-btn-border-radius);
      padding: 0.75rem 2.25rem;
      font-weight: 600;
      transition: all 0.3s ease;
    }

    .btn-primary-custom:hover {
      background-color: #00B7B2;
      border-color: #00B7B2;
      transform: translateY(-3px);
      box-shadow: 0 8px 20px rgba(0, 206, 201, 0.3);
    }

    .btn-outline-primary-custom {
      border: 2px solid var(--bs-primary);
      color: var(--bs-primary);
      background-color: transparent;
      border-radius: var(--bs-btn-border-radius);
      padding: 0.75rem 2.25rem;
      font-weight: 600;
      transition: all 0.3s ease;
    }

    .btn-outline-primary-custom:hover {
      background-color: var(--bs-primary);
      color: white;
      transform: translateY(-3px);
    }

    /* 痛点与解决方案卡片 */
    .problem-card, .solution-card {
      background: white;
      border-radius: var(--bs-border-radius);
      padding: 2rem;
      height: 100%;
      box-shadow: var(--bs-box-shadow);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      border: 1px solid #F0F0F0;
    }

    .problem-card:hover, .solution-card:hover {
      transform: translateY(-10px);
      box-shadow: var(--bs-box-shadow-lg);
    }

    .icon-wrapper {
      width: 70px;
      height: 70px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 1.5rem;
      font-size: 1.8rem;
    }

    .problem-card .icon-wrapper {
      background-color: rgba(214, 48, 49, 0.1);
      color: #D63031;
    }

    .solution-card .icon-wrapper {
      background-color: rgba(108, 92, 231, 0.1);
      color: var(--bs-primary);
    }

    .card-title {
      font-size: 1.4rem;
      font-weight: 600;
      margin-bottom: 1rem;
    }

    /* 数据看板 */
    .stats-section {
      background: linear-gradient(135deg, var(--bs-primary) 0%, #8A7CEE 100%);
      color: white;
    }

    .stat-number {
      font-size: 3rem;
      font-weight: 700;
      color: white;
      line-height: 1;
    }

    .stat-label {
      font-size: 1.1rem;
      opacity: 0.9;
      margin-top: 0.5rem;
    }

    /* 客户证言 */
    .testimonial-card {
      background: white;
      border-radius: var(--bs-border-radius);
      padding: 2rem;
      box-shadow: var(--bs-box-shadow);
      position: relative;
      border-left: 4px solid var(--bs-secondary);
    }

    .testimonial-text {
      font-style: italic;
      margin-bottom: 1.5rem;
    }

    .client-info {
      display: flex;
      align-items: center;
    }

    .client-avatar {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      margin-right: 1rem;
      object-fit: cover;
    }

    /* 服务分类入口卡片 */
    .service-category-card {
      background: white;
      border-radius: var(--bs-border-radius);
      overflow: hidden;
      box-shadow: var(--bs-box-shadow);
      transition: all 0.3s ease;
      height: 100%;
    }

    .service-category-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--bs-box-shadow-lg);
    }

    .category-img {
      height: 180px;
      width: 100%;
      object-fit: cover;
    }

    .category-content {
      padding: 1.8rem;
    }

    .category-title {
      font-size: 1.4rem;
      font-weight: 600;
      margin-bottom: 0.75rem;
      color: var(--bs-dark);
    }

    .category-cta {
      color: var(--bs-secondary);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
    }

    .category-cta i {
      margin-left: 0.5rem;
      transition: transform 0.3s ease;
    }

    .category-cta:hover i {
      transform: translateX(5px);
    }

    /* FAQ 手风琴 */
    .accordion-custom .accordion-item {
      border: 1px solid #EDEDED;
      border-radius: 8px;
      margin-bottom: 1rem;
      overflow: hidden;
    }

    .accordion-custom .accordion-button {
      background-color: white;
      color: var(--bs-dark);
      font-weight: 600;
      padding: 1.25rem 1.5rem;
      box-shadow: none;
    }

    .accordion-custom .accordion-button:not(.collapsed) {
      background-color: white;
      color: var(--bs-primary);
    }

    .accordion-custom .accordion-button::after {
      background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%236C5CE7'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
      transform: scale(1.2);
    }

    .accordion-custom .accordion-button:focus {
      box-shadow: 0 0 0 0.25rem rgba(108, 92, 231, 0.25);
    }

    .accordion-custom .accordion-body {
      padding: 1.5rem;
      border-left: 2px solid var(--bs-secondary);
      background-color: var(--bs-light);
    }

    /* 联系表单 */
    .form-control-custom {
      border-radius: 8px;
      border: 1px solid #DDD;
      padding: 0.875rem 1rem;
      font-size: 1rem;
      transition: all 0.3s ease;
    }

    .form-control-custom:focus {
      border-color: var(--bs-secondary);
      box-shadow: 0 0 0 0.25rem rgba(0, 206, 201, 0.25);
    }

    /* 页脚 */
    .site-footer {
      background-color: #1E272E;
      color: #BDC3C7;
      padding-top: 4rem;
      padding-bottom: 2rem;
    }

    .footer-logo {
      font-size: 1.8rem;
      font-weight: 700;
      color: white;
      margin-bottom: 1rem;
    }

    .footer-logo .logo-accent {
      color: var(--bs-secondary);
    }

    .footer-heading {
      color: white;
      font-size: 1.2rem;
      font-weight: 600;
      margin-bottom: 1.5rem;
    }

    .footer-links a {
      color: #BDC3C7;
      display: block;
      margin-bottom: 0.75rem;
      transition: color 0.2s ease;
    }

    .footer-links a:hover {
      color: var(--bs-secondary);
    }

    .social-links a {
      display: inline-block;
      width: 40px;
      height: 40px;
      background-color: #2C3A47;
      color: #BDC3C7;
      border-radius: 50%;
      text-align: center;
      line-height: 40px;
      margin-right: 0.75rem;
      transition: all 0.3s ease;
    }

    .social-links a:hover {
      background-color: var(--bs-secondary);
      color: white;
      transform: translateY(-3px);
    }

    .copyright {
      border-top: 1px solid #2C3A47;
      padding-top: 2rem;
      margin-top: 3rem;
      text-align: center;
      font-size: 0.9rem;
      color: #95A5A6;
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 2.5rem;
      }
      section {
        padding-top: 4rem;
        padding-bottom: 4rem;
      }
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 2.2rem;
      }
      .hero-subtitle {
        font-size: 1.1rem;
      }
      .stat-number {
        font-size: 2.5rem;
      }
      .navbar-collapse {
        background-color: rgba(255, 255, 255, 0.98);
        padding: 1.5rem;
        border-radius: 12px;
        box-shadow: var(--bs-box-shadow-lg);
        margin-top: 1rem;
      }
    }

    @media (max-width: 576px) {
      .hero-title {
        font-size: 1.9rem;
      }
      section {
        padding-top: 3rem;
        padding-bottom: 3rem;
      }
      .container-custom {
        padding-left: 1rem;
        padding-right: 1rem;
      }
    }

/* roulang page: category1 */
:root {
            /* 设计变量 */
            --primary-color: #6C5CE7;
            --secondary-color: #00CEC9;
            --dark-color: #2D3436;
            --light-dark: #1E272E;
            --light-gray: #F9F9F9;
            --border-color: #EDEDED;
            --text-color: #2D3436;
            --text-light: #636E72;
            --white: #FFFFFF;
            --shadow-base: 0 4px 12px rgba(108, 92, 231, 0.08);
            --shadow-hover: 0 10px 25px rgba(108, 92, 231, 0.12);
            --radius-card: 12px;
            --radius-button: 50px;
            --radius-small: 8px;
            --transition-base: all 0.3s ease;
        }
        /* Base Reset */
        *, *::before, *::after { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--text-color);
            line-height: 1.6;
            background-color: var(--white);
            overflow-x: hidden;
        }
        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: var(--transition-base);
        }
        a:hover { color: var(--secondary-color); }
        img { max-width: 100%; height: auto; display: block; }
        .container-custom {
            width: 100%;
            max-width: 1140px;
            padding-right: 15px;
            padding-left: 15px;
            margin-right: auto;
            margin-left: auto;
        }
        .section-padding { padding-top: 5rem; padding-bottom: 5rem; }
        .section-padding-md { padding-top: 3rem; padding-bottom: 3rem; }
        .bg-alt { background-color: var(--light-gray); }
        .bg-dark { background-color: var(--light-dark); color: #BDC3C7; }
        h1 { font-size: 2.8rem; font-weight: 700; line-height: 1.2; }
        h2 { font-size: 2.2rem; font-weight: 600; margin-bottom: 1.5rem; }
        h3 { font-size: 1.5rem; font-weight: 600; margin-bottom: 0.75rem; }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .section-padding { padding-top: 3rem; padding-bottom: 3rem; }
        }

        /* 导航样式覆写 */
        .navbar-custom {
            background-color: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            padding-top: 0.75rem;
            padding-bottom: 0.75rem;
        }
        .navbar-custom .navbar-brand {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--dark-color);
        }
        .logo-accent { color: var(--primary-color); }
        .navbar-custom .nav-link {
            color: var(--dark-color);
            font-weight: 500;
            padding: 0.5rem 1.2rem;
            position: relative;
        }
        .navbar-custom .nav-item.active .nav-link,
        .navbar-custom .nav-link.active {
            color: var(--primary-color);
        }
        .navbar-custom .nav-item.active .nav-link::after,
        .navbar-custom .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 1.2rem;
            right: 1.2rem;
            height: 2px;
            background-color: var(--secondary-color);
            border-radius: 1px;
        }
        .navbar-custom .nav-link:hover { color: var(--secondary-color); }
        .navbar-custom .navbar-toggler {
            border: none;
            color: var(--dark-color);
            font-size: 1.5rem;
            padding: 0.25rem;
        }
        .navbar-custom .navbar-toggler:focus { box-shadow: none; }
        @media (max-width: 992px) {
            .navbar-custom .navbar-collapse {
                background-color: rgba(255, 255, 255, 0.98);
                padding: 1rem;
                border-radius: var(--radius-card);
                margin-top: 1rem;
                box-shadow: var(--shadow-hover);
            }
        }

        /* 按钮样式覆写 */
        .btn-primary-custom {
            background-color: var(--secondary-color);
            color: var(--white);
            border: none;
            border-radius: var(--radius-button);
            padding: 0.75rem 2rem;
            font-weight: 600;
            transition: var(--transition-base);
        }
        .btn-primary-custom:hover {
            background-color: #00B7B2;
            color: var(--white);
            box-shadow: 0 6px 15px rgba(0, 206, 201, 0.3);
        }
        .btn-outline-primary-custom {
            background-color: transparent;
            color: var(--primary-color);
            border: 2px solid var(--primary-color);
            border-radius: var(--radius-button);
            padding: 0.75rem 2rem;
            font-weight: 600;
        }
        .btn-outline-primary-custom:hover {
            background-color: var(--primary-color);
            color: var(--white);
            border-color: var(--primary-color);
        }

        /* Hero Banner */
        .category-hero {
            padding-top: 9rem;
            padding-bottom: 5rem;
            background: linear-gradient(rgba(30, 39, 46, 0.85), rgba(108, 92, 231, 0.2)), url('/assets/images/backpic/back-2.webp') no-repeat center center;
            background-size: cover;
            color: var(--white);
        }
        .category-hero h1 { color: var(--white); }
        .category-hero .lead {
            font-size: 1.2rem;
            opacity: 0.9;
            max-width: 700px;
            margin: 1.5rem auto 2rem;
        }

        /* 服务卡片 */
        .service-card {
            background: var(--white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-base);
            border: 1px solid var(--border-color);
            padding: 2rem;
            height: 100%;
            transition: var(--transition-base);
            margin-bottom: 1.5rem;
        }
        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-hover);
        }
        .service-card .icon {
            width: 70px;
            height: 70px;
            background: linear-gradient(135deg, rgba(108, 92, 231, 0.1), rgba(0, 206, 201, 0.1));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
        }
        .service-card .icon i {
            font-size: 1.8rem;
            color: var(--primary-color);
        }
        .service-card h3 { color: var(--dark-color); }
        .service-card .features {
            list-style: none;
            padding-left: 0;
            margin-top: 1rem;
        }
        .service-card .features li {
            padding: 0.3rem 0;
            position: relative;
            padding-left: 1.5rem;
        }
        .service-card .features li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--secondary-color);
            font-weight: bold;
        }
        .service-card .text-link {
            display: inline-block;
            margin-top: 1.5rem;
            color: var(--secondary-color);
            font-weight: 600;
        }
        .service-card .text-link:hover {
            text-decoration: underline;
        }

        /* 流程展示 */
        .process-step {
            text-align: center;
            padding: 2rem 1rem;
        }
        .process-step .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 60px;
            height: 60px;
            background-color: var(--primary-color);
            color: white;
            font-size: 1.5rem;
            font-weight: bold;
            border-radius: 50%;
            margin-bottom: 1.5rem;
        }
        .process-step h4 { margin-bottom: 0.75rem; }

        /* FAQ 手风琴 */
        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-small);
            margin-bottom: 1rem;
            overflow: hidden;
        }
        .faq-question {
            padding: 1.5rem;
            background-color: var(--white);
            cursor: pointer;
            font-weight: 600;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: background-color 0.2s ease;
        }
        .faq-question:hover { background-color: var(--light-gray); }
        .faq-question i { color: var(--secondary-color); transition: transform 0.3s ease; }
        .faq-question.collapsed i { transform: rotate(0deg); }
        .faq-question:not(.collapsed) i { transform: rotate(180deg); }
        .faq-answer {
            padding: 1.5rem;
            border-top: 1px solid var(--border-color);
            background-color: var(--light-gray);
            position: relative;
        }
        .faq-answer::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background-color: var(--secondary-color);
        }

        /* 页脚样式覆写 */
        .site-footer {
            background-color: var(--light-dark);
            color: #BDC3C7;
            padding-top: 4rem;
            padding-bottom: 2rem;
        }
        .site-footer .footer-logo {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
        }
        .site-footer .footer-heading {
            color: var(--white);
            font-size: 1.2rem;
            margin-bottom: 1.5rem;
            font-weight: 600;
        }
        .site-footer .footer-links {
            display: flex;
            flex-direction: column;
        }
        .site-footer .footer-links a,
        .site-footer .footer-links p {
            color: #BDC3C7;
            margin-bottom: 0.75rem;
            transition: var(--transition-base);
        }
        .site-footer .footer-links a:hover {
            color: var(--secondary-color);
            padding-left: 5px;
        }
        .site-footer .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background-color: rgba(255, 255, 255, 0.08);
            color: #BDC3C7;
            border-radius: 50%;
            margin-right: 0.75rem;
            transition: var(--transition-base);
        }
        .site-footer .social-links a:hover {
            background-color: var(--secondary-color);
            color: var(--white);
            transform: translateY(-3px);
        }
        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            margin-top: 3rem;
            padding-top: 2rem;
            text-align: center;
            font-size: 0.9rem;
            color: #95A5A6;
        }