/* 全局 */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: "Microsoft YaHei", "PingFang SC", sans-serif; line-height: 1.6; color: #333; background: #fff; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* 顶部 */
.top-bar { background: #1a3a5c; color: #fff; padding: 10px 0; font-size: 14px; }
.top-bar .container { display: flex; justify-content: space-between; }

/* 导航 */
.header { background: #fff; box-shadow: 0 2px 10px rgba(0,0,0,0.1); position: sticky; top: 0; z-index: 100; }
.header .container { display: flex; align-items: center; justify-content: space-between; height: 80px; }
.logo { display: flex; align-items: center; gap: 12px; }
.logo-img { width: 50px; height: 50px; border-radius: 8px; object-fit: cover; }
.logo-text { display: flex; flex-direction: column; }
.logo-main { font-size: 22px; font-weight: bold; color: #1a3a5c; }
.logo-sub { font-size: 11px; color: #888; }
.nav { display: flex; gap: 18px; }
.nav a { font-size: 14px; color: #333; transition: color 0.3s; padding: 5px 0; }
.nav a:hover { color: #e74c3c; }
.btn-consult { background: #e74c3c; color: #fff; padding: 10px 22px; border-radius: 4px; font-size: 14px; font-weight: 500; transition: background 0.3s; }
.btn-consult:hover { background: #c0392b; }

/* Banner */
.banner { background: linear-gradient(135deg, #1a3a5c 0%, #2c5282 100%); color: #fff; padding: 80px 0; text-align: center; }
.banner h1 { font-size: 36px; margin-bottom: 12px; }
.banner p { font-size: 20px; margin-bottom: 8px; }
.banner .banner-sub { font-size: 16px; opacity: 0.9; margin-bottom: 20px; }
.banner-tags { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; margin-bottom: 25px; }
.banner-tags span { background: rgba(255,255,255,0.15); padding: 8px 18px; border-radius: 20px; font-size: 14px; }
.btn { display: inline-block; background: #e74c3c; color: #fff; padding: 14px 35px; border-radius: 4px; font-size: 16px; transition: background 0.3s; border: none; cursor: pointer; }
.btn:hover { background: #c0392b; }

/* 数据条 */
.stats { background: #f8f9fa; padding: 40px 0; margin-top: -40px; position: relative; z-index: 10; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; background: #fff; border-radius: 10px; padding: 30px; box-shadow: 0 5px 25px rgba(0,0,0,0.08); }
.stat-item { text-align: center; }
.stat-num { display: block; font-size: 38px; font-weight: bold; color: #e74c3c; }
.stat-label { font-size: 14px; color: #666; }

/* 通用标题 */
.section-title { text-align: center; font-size: 30px; color: #1a3a5c; margin-bottom: 15px; position: relative; }
.section-title::after { content: ''; display: block; width: 60px; height: 3px; background: #e74c3c; margin: 15px auto 0; }

/* 关于我们 */
.about { padding: 80px 0; background: #fff; }
.about-content { display: flex; gap: 40px; align-items: center; }
.about-text { flex: 1; }
.about-text p { margin-bottom: 18px; color: #555; line-height: 1.8; }
.about-features { display: flex; gap: 20px; flex-wrap: wrap; margin-top: 25px; }
.about-features span { display: flex; align-items: center; gap: 8px; color: #27ae60; font-size: 15px; background: #e8f8f0; padding: 8px 16px; border-radius: 20px; }
.about-features i { font-style: normal; }
.about-image { width: 350px; flex-shrink: 0; }
.placeholder { background: linear-gradient(135deg, #ecf0f1, #dfe6e9); height: 250px; display: flex; align-items: center; justify-content: center; color: #95a5a6; border-radius: 8px; }
.office-img { width: 100%; height: auto; max-height: 320px; object-fit: contain; border-radius: 10px; box-shadow: 0 5px 25px rgba(0,0,0,0.1); }

/* 团队介绍 */
.team { padding: 80px 0; background: #f8f9fa; }
.team-desc { text-align: center; color: #666; margin-bottom: 35px; }
.team-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 25px; }
.team-member { background: #fff; padding: 30px 20px; border-radius: 10px; text-align: center; box-shadow: 0 3px 15px rgba(0,0,0,0.06); transition: all 0.3s; }
.team-member:hover { box-shadow: 0 10px 30px rgba(0,0,0,0.12); transform: translateY(-5px); }
.member-photo { width: 80px; height: 80px; border-radius: 50%; margin: 0 auto 15px; overflow: hidden; background: linear-gradient(135deg, #1a3a5c, #2c5282); display: flex; align-items: center; justify-content: center; }
.member-photo img { width: 100%; height: 100%; object-fit: cover; }
.team-member h3 { font-size: 18px; color: #1a3a5c; margin-bottom: 8px; }
.member-title { font-size: 13px; color: #e74c3c; margin-bottom: 12px; font-weight: 500; }
.member-desc { font-size: 13px; color: #666; line-height: 1.6; text-align: left; }

/* 服务行业 */
.industries { padding: 60px 0; background: #f8f9fa; }
.industries-desc { text-align: center; color: #666; margin-bottom: 35px; }
.industries-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
.industry-item { background: #fff; text-align: center; padding: 15px 10px; border-radius: 6px; font-size: 14px; color: #1a3a5c; border: 1px solid #e8eaed; transition: all 0.3s; }
.industry-item:hover { background: #1a3a5c; color: #fff; border-color: #1a3a5c; }
.industries-more { text-align: center; margin-top: 35px; padding-top: 25px; border-top: 1px solid #ddd; color: #888; font-size: 14px; }

/* 核心产品 */
.products { padding: 80px 0; background: #fff; }
.products-desc { text-align: center; color: #666; margin-bottom: 35px; }
.products-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.product-card { background: #f8f9fa; padding: 25px; border-radius: 10px; border-left: 4px solid #e74c3c; transition: all 0.3s; }
.product-card:hover { background: #fff; box-shadow: 0 8px 25px rgba(0,0,0,0.1); transform: translateY(-3px); }
.product-num { font-size: 32px; font-weight: bold; color: #e74c3c; margin-bottom: 10px; }
.product-card h3 { font-size: 17px; color: #1a3a5c; margin-bottom: 10px; }
.product-card p { font-size: 13px; color: #666; line-height: 1.6; }

/* 服务 */
.services { background: #f8f9fa; padding: 80px 0; }
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 25px; }
.service-item { background: #fff; padding: 30px; border-radius: 10px; box-shadow: 0 3px 15px rgba(0,0,0,0.06); transition: all 0.3s; }
.service-item:hover { box-shadow: 0 10px 30px rgba(0,0,0,0.12); transform: translateY(-5px); }
.service-icon { font-size: 40px; margin-bottom: 15px; }
.service-item h3 { font-size: 18px; color: #1a3a5c; margin-bottom: 12px; }
.service-item p { font-size: 14px; color: #666; line-height: 1.7; }
.services-more { text-align: center; padding: 25px; border-top: 1px solid #ddd; color: #888; font-size: 14px; line-height: 1.8; }

/* 服务流程 */
.process { padding: 80px 0; background: #fff; }
.process-desc { text-align: center; color: #666; margin-bottom: 35px; }
.process-tabs { display: flex; justify-content: center; gap: 15px; margin-bottom: 40px; }
.tab-btn { padding: 12px 35px; font-size: 15px; border: 2px solid #1a3a5c; background: #fff; color: #1a3a5c; border-radius: 30px; cursor: pointer; transition: all 0.3s; }
.tab-btn:hover, .tab-btn.active { background: #1a3a5c; color: #fff; }
.process-panel { display: none; }
.process-panel.active { display: block; }
.process-step { display: flex; gap: 25px; margin-bottom: 18px; padding: 22px; background: #f8f9fa; border-radius: 8px; }
.step-num { width: 50px; height: 50px; background: #e74c3c; color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 18px; font-weight: bold; flex-shrink: 0; }
.step-content h4 { font-size: 17px; color: #1a3a5c; margin-bottom: 6px; }
.step-content p { font-size: 14px; color: #666; }
.step-time { font-size: 12px; color: #e74c3c; margin-top: 5px; font-weight: 500; }
.process-note { text-align: center; margin-top: 30px; padding: 20px; background: #fff3e0; border-radius: 8px; color: #e65100; }

/* 案例 */
.cases { padding: 80px 0; background: #f8f9fa; }
.cases-desc { text-align: center; color: #666; margin-bottom: 35px; }
.case-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.case-card { background: #fff; border-radius: 10px; padding: 22px; box-shadow: 0 3px 15px rgba(0,0,0,0.06); transition: all 0.3s; }
.case-card:hover { box-shadow: 0 10px 30px rgba(0,0,0,0.12); transform: translateY(-5px); }
.case-industry { display: inline-block; background: #1a3a5c; color: #fff; padding: 4px 12px; border-radius: 12px; font-size: 11px; margin-bottom: 12px; }
.case-card h3 { font-size: 16px; color: #1a3a5c; margin-bottom: 8px; }
.case-problem { font-size: 13px; color: #888; margin-bottom: 10px; line-height: 1.5; }
.case-service { font-size: 12px; color: #e74c3c; margin-bottom: 10px; }
.case-result { display: flex; flex-wrap: wrap; gap: 6px; }
.case-result span { background: #e8f8f0; color: #27ae60; padding: 4px 10px; border-radius: 4px; font-size: 11px; }
.cases-more { text-align: center; margin-top: 35px; padding-top: 25px; border-top: 1px solid #ddd; color: #888; font-size: 14px; }

/* 案例详情展开 - 默认隐藏 */
.case-detail { display: none; margin-top: 15px; padding: 20px; background: #f8f9fa; border-radius: 8px; border-left: 3px solid #e74c3c; }
.case-detail-toggle { margin-top: 15px; padding-top: 15px; border-top: 1px dashed #ddd; color: #e74c3c; font-size: 13px; cursor: pointer; text-align: center; transition: color 0.3s; }
.case-detail-toggle:hover { color: #c0392b; }
.case-card.active .case-detail { display: block; }
.case-card.active .case-detail-toggle { color: #27ae60; }
.case-detail h4 { font-size: 14px; color: #1a3a5c; margin: 15px 0 8px; }
.case-detail h4:first-child { margin-top: 0; }
.case-detail p { font-size: 13px; color: #555; line-height: 1.7; margin-bottom: 10px; }
.case-detail ul { padding-left: 20px; }
.case-detail li { font-size: 13px; color: #555; line-height: 1.8; margin-bottom: 5px; }

/* 为什么选择 */
.why { background: linear-gradient(135deg, #1a3a5c, #2c5282); color: #fff; padding: 80px 0; }
.why .section-title { color: #fff; }
.why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 25px; }
.why-item { text-align: center; padding: 30px 20px; background: rgba(255,255,255,0.1); border-radius: 10px; }
.why-item .icon { display: inline-block; width: 45px; height: 45px; background: #27ae60; border-radius: 50%; line-height: 45px; font-size: 20px; margin-bottom: 15px; }
.why-item h4 { font-size: 17px; margin-bottom: 10px; }
.why-item p { font-size: 13px; opacity: 0.85; line-height: 1.6; }

/* 企业资质介绍 */
.qualifications { background: #f8f9fa; padding: 80px 0; }
.qualifications-content { max-width: 1100px; margin: 0 auto; text-align: center; }
.qualifications-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.qualification-item { text-align: center; padding: 15px; background: #fff; border-radius: 10px; box-shadow: 0 2px 10px rgba(0,0,0,0.08); }
.qualification-item img { width: 100%; height: 220px; object-fit: contain; border-radius: 6px; margin-bottom: 10px; }
.cert-label { font-size: 13px; color: #555; margin: 0; }

/* 联系 */
.contact { background: #fff; padding: 80px 0; }
.contact-content { display: flex; gap: 50px; }
.contact-info { flex: 1; }
.contact-info h3 { font-size: 22px; color: #1a3a5c; margin-bottom: 25px; }
.contact-info p { margin-bottom: 15px; color: #555; font-size: 15px; }
.contact-form { flex: 1.2; background: #f8f9fa; padding: 35px; border-radius: 10px; }
.contact-form h3 { font-size: 20px; margin-bottom: 25px; color: #1a3a5c; }
.contact-form input, .contact-form select, .contact-form textarea { width: 100%; padding: 14px 16px; border: 1px solid #ddd; border-radius: 6px; font-size: 14px; margin-bottom: 15px; font-family: inherit; background: #fff; }
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { outline: none; border-color: #1a3a5c; }
.contact-form .btn { width: 100%; }

/* 页脚 */
.footer { background: #1a3a5c; color: #fff; padding: 30px 0; }
.footer-content { display: flex; justify-content: space-between; align-items: center; }
.footer-left { display: flex; align-items: center; gap: 15px; }
.footer-logo { width: 40px; height: 40px; border-radius: 6px; }
.footer-left p { font-size: 14px; opacity: 0.8; }
.footer-right { text-align: right; }
.footer-right p { font-size: 13px; opacity: 0.7; margin-bottom: 5px; }

/* 响应式 */
@media (max-width: 1024px) {
    .products-grid { grid-template-columns: repeat(2, 1fr); }
    .case-grid { grid-template-columns: repeat(2, 1fr); }
    .team-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
    /* 导航 */
    .nav { display: none; }
    .header .container { height: 50px; }
    .logo-img { width: 35px; height: 35px; }
    .logo-main { font-size: 14px; }
    .logo-sub { display: none; }
    .btn-consult { padding: 6px 14px; font-size: 12px; }
    
    /* 顶部栏 */
    .top-bar .container { flex-direction: column; gap: 3px; text-align: center; }
    .top-bar { padding: 5px 0; font-size: 10px; }
    
    /* Banner */
    .banner { padding: 30px 0; }
    .banner h1 { font-size: 16px; }
    .banner p { font-size: 12px; }
    .banner-sub { font-size: 11px !important; }
    .banner-tags { gap: 5px; margin-bottom: 15px; }
    .banner-tags span { padding: 4px 8px; font-size: 10px; }
    .btn { padding: 8px 18px; font-size: 12px; }
    
    /* 数据条 */
    .stats { padding: 20px 0; margin-top: 0; }
    .stats-grid { grid-template-columns: repeat(4, 1fr); gap: 8px; padding: 12px; }
    .stat-num { font-size: 18px; }
    .stat-label { font-size: 10px; }
    
    /* 标题 */
    .section-title { font-size: 16px; }
    .section-title::after { width: 30px; height: 2px; margin: 10px auto 0; }
    
    /* 关于我们 */
    .about { padding: 25px 0; }
    .about-content { flex-direction: column; gap: 15px; }
    .about-text { width: 100%; }
    .about-image { width: 100%; }
    .about-image img { max-height: 220px; width: 100%; object-fit: cover; border-radius: 8px; }
    .about-text p { font-size: 11px; line-height: 1.6; }
    .about-features { gap: 8px; flex-wrap: wrap; }
    .about-features span { padding: 5px 8px; font-size: 9px; }
    .about-features i { font-size: 10px; }
    
    /* 团队 */
    .team { padding: 25px 0; }
    .team-desc { font-size: 11px; margin-bottom: 20px; }
    .team-grid { grid-template-columns: repeat(3, 1fr); gap: 8px; }
    .team-member { padding: 10px 8px; }
    .member-photo { width: 40px; height: 40px; }
    .team-member h3 { font-size: 11px; }
    .member-title { font-size: 9px; }
    .member-desc { font-size: 9px; line-height: 1.4; }
    
    /* 服务行业 */
    .industries { padding: 25px 0; }
    .industries-desc { font-size: 11px; margin-bottom: 20px; }
    .industries-grid { grid-template-columns: repeat(5, 1fr); gap: 6px; }
    .industry-item { padding: 8px 4px; font-size: 10px; }
    .industries-more { font-size: 10px; padding: 12px; }
    
    /* 核心产品 */
    .products { padding: 25px 0; }
    .products-desc { font-size: 11px; margin-bottom: 20px; }
    .products-grid { grid-template-columns: repeat(4, 1fr); gap: 10px; }
    .product-card { padding: 12px; }
    .product-num { font-size: 16px; margin-bottom: 5px; }
    .product-card h3 { font-size: 11px; margin-bottom: 5px; }
    .product-card p { font-size: 9px; line-height: 1.4; }
    
    /* 服务 */
    .services { padding: 25px 0; }
    .service-grid { grid-template-columns: repeat(3, 1fr); gap: 10px; }
    .service-item { padding: 12px; }
    .service-icon { font-size: 24px; margin-bottom: 8px; }
    .service-item h3 { font-size: 11px; margin-bottom: 6px; }
    .service-item p { font-size: 9px; line-height: 1.4; }
    .services-more { font-size: 10px; padding: 12px; }
    
    /* 服务流程 */
    .process { padding: 25px 0; }
    .process-desc { font-size: 11px; margin-bottom: 20px; }
    .process-tabs { gap: 8px; margin-bottom: 20px; }
    .tab-btn { padding: 6px 16px; font-size: 11px; }
    .process-step { gap: 10px; padding: 10px; margin-bottom: 10px; }
    .step-num { width: 24px; height: 24px; font-size: 11px; }
    .step-content h4 { font-size: 11px; margin-bottom: 3px; }
    .step-content p { font-size: 10px; }
    .step-time { font-size: 9px; }
    .process-note { font-size: 10px; padding: 10px; }
    
    /* 案例 */
    .cases { padding: 25px 0; }
    .cases-desc { font-size: 11px; margin-bottom: 20px; }
    .case-grid { grid-template-columns: repeat(4, 1fr); gap: 10px; }
    .case-card { padding: 12px; }
    .case-industry { padding: 2px 6px; font-size: 9px; }
    .case-card h3 { font-size: 11px; margin-bottom: 5px; }
    .case-problem { font-size: 9px; margin-bottom: 6px; }
    .case-service { font-size: 9px; margin-bottom: 6px; }
    .case-result span { padding: 2px 5px; font-size: 8px; }
    .cases-more { font-size: 10px; padding: 12px; }
    
    /* 为什么选择 */
    .why { padding: 25px 0; }
    .why-grid { grid-template-columns: repeat(4, 1fr); gap: 10px; }
    .why-item { padding: 12px 8px; }
    .why-item .icon { width: 30px; height: 30px; line-height: 30px; font-size: 14px; margin-bottom: 8px; }
    .why-item h4 { font-size: 11px; margin-bottom: 5px; }
    .why-item p { font-size: 9px; }
    
    /* 企业资质 */
    .qualifications { padding: 25px 0; }
    .qualifications-content { max-width: 1100px; margin: 0 auto; text-align: center; }
    .qualifications-grid { grid-template-columns: repeat(4, 1fr); gap: 10px; }
    .qualification-item { padding: 8px; }
    .qualification-item img { height: 100px; }
    .cert-label { font-size: 10px; }
    
    /* 联系 */
    .contact { padding: 25px 0; }
    .contact-content { gap: 20px; }
    .contact-info { flex: 1; }
    .contact-info h3 { font-size: 14px; margin-bottom: 15px; }
    .contact-info p { font-size: 11px; margin-bottom: 10px; }
    .contact-form { flex: 1.2; padding: 15px; }
    .contact-form h3 { font-size: 14px; margin-bottom: 15px; }
    .contact-form input, .contact-form select, .contact-form textarea { padding: 8px 10px; font-size: 12px; margin-bottom: 10px; }
    
    /* 页脚 */
    .footer { padding: 15px 0; }
    .footer-content { flex-direction: row; justify-content: space-between; }
    .footer-left { gap: 10px; }
    .footer-logo { width: 30px; height: 30px; }
    .footer-left p { font-size: 10px; }
    .footer-right { text-align: right; }
    .footer-right p { font-size: 11px; margin-bottom: 3px; opacity: 1; }
    .footer-right a { color: #fff; opacity: 1; font-size: 10px; }
}

/* 更小屏幕 */
@media (max-width: 480px) {
    .container { padding: 0 10px; }
    .banner h1 { font-size: 14px; }
    .banner p { font-size: 11px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 6px; padding: 10px; }
    .stat-num { font-size: 16px; }
    .stat-label { font-size: 9px; }
    .team-grid { grid-template-columns: repeat(2, 1fr); }
    .industries-grid { grid-template-columns: repeat(3, 1fr); }
    .products-grid { grid-template-columns: repeat(2, 1fr); }
    .service-grid { grid-template-columns: repeat(2, 1fr); }
    .case-grid { grid-template-columns: repeat(2, 1fr); }
    .why-grid { grid-template-columns: repeat(2, 1fr); }
    .qualifications-grid { grid-template-columns: repeat(2, 1fr); }
    .qualification-item img { height: 80px; }
}