/* ============ 全局变量 ============ */
:root {
    --primary:#1a56db;
    --primary-dark:#1e40af;
    --primary-light:#dbeafe;
    --dark:#0f172a;
    --slate:#1e293b;
    --gray:#64748b;
}

/* ============ 基础样式 ============ */
html{scroll-behavior:smooth;}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Noto Sans SC',sans-serif;color:var(--slate);line-height:1.7;}
.section{padding:80px 0;}

/* ============ 导航栏 ============ */
.navbar{padding:12px 0;background:rgba(15,23,42,0.95)!important;backdrop-filter:blur(10px);}
.navbar.scrolled{background:rgba(15,23,42,0.98)!important;box-shadow:0 2px 20px rgba(0,0,0,0.3);}
.navbar-brand{font-size:1.3rem;font-weight:700;letter-spacing:1px;}
.navbar-brand img{border-radius:6px;}
.nav-link{color:rgba(255,255,255,0.85)!important;font-size:0.95rem;font-weight:500;padding:8px 18px!important;position:relative;transition:all 0.3s;}
.nav-link:hover,.nav-link.active{color:#fff!important;}
.nav-link::after{content:'';position:absolute;bottom:0;left:18px;right:18px;height:2px;background:var(--primary);transform:scaleX(0);transition:transform 0.3s;}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1);}

/* ============ 页面头部 ============ */
.page-header{background:linear-gradient(135deg,var(--primary-dark),var(--primary));padding:80px 0 50px;color:#fff;text-align:center;}
.page-header h2{font-size:2.5rem;font-weight:800;}
.page-header .page-header-sub{letter-spacing:3px;}

/* ============ 面包屑 ============ */
.breadcrumb-bar{padding:10px 0;background:rgba(0,0,0,0.1);}
.breadcrumb-bar a{color:rgba(255,255,255,0.7);text-decoration:none;font-size:0.85rem;}
.breadcrumb-bar a:hover{color:#fff;}
.breadcrumb-bar span{color:rgba(255,255,255,0.5);margin:0 6px;font-size:0.85rem;}
.breadcrumb-bar .current{color:#fff;font-size:0.85rem;}

/* ============ 分页（business / cases / news 共享） ============ */
.pagination .page-link{border-radius:8px;margin:0 3px;border-color:#e2e8f0;color:var(--slate);padding:10px 16px;}
.pagination .page-item.active .page-link{background:var(--primary);border-color:var(--primary);color:#fff;}
.pagination .page-item.disabled .page-link{background:#f8fafc;color:#cbd5e1;}

/* ============ 分类筛选栏（business / cases / news 共享） ============ */
.filter-bar{padding:20px 0;background:#fff;border-bottom:1px solid #e2e8f0;position:sticky;top:72px;z-index:10;}
.filter-bar .filter-label{font-weight:600;color:var(--dark);white-space:nowrap;margin-right:12px;}
.filter-bar .filter-chip{display:inline-block;padding:6px 18px;border-radius:50px;font-size:0.9rem;font-weight:500;color:var(--gray);text-decoration:none;border:1px solid #e2e8f0;margin:4px 6px;transition:all 0.25s;}
.filter-bar .filter-chip:hover{color:var(--primary);border-color:var(--primary);}
.filter-bar .filter-chip.active{background:var(--primary);color:#fff;border-color:var(--primary);}

/* ============ 页脚 ============ */
footer{background:var(--dark);color:#94a3b8;padding:60px 0 30px;}
footer h5{color:#fff;font-weight:700;margin-bottom:18px;font-size:1.05rem;}
footer .footer-links{list-style:none;padding:0;}
footer .footer-links li{margin-bottom:8px;}
footer .footer-links li a{color:#94a3b8;text-decoration:none;transition:color 0.3s;font-size:0.9rem;}
footer .footer-links li a:hover{color:#fff;}
footer hr{border-color:rgba(255,255,255,0.1);}
footer a{color:#94a3b8;text-decoration:none;}
footer a:hover{color:#fff;}
footer .footer-sm{font-size:0.9rem;}
footer .footer-sm a{color:#94a3b8;text-decoration:none;}
footer .footer-addr{max-width:360px;}

/* ============ 文章详情页（article-detail / recruit-detail 共享） ============ */
.article-card{background:#fff;border-radius:16px;border:1px solid #e2e8f0;padding:40px;}
.article-card h1{font-size:2rem;font-weight:800;color:var(--dark);margin-bottom:16px;line-height:1.4;}
.article-meta{display:flex;gap:24px;color:var(--gray);font-size:0.9rem;padding-bottom:20px;margin-bottom:30px;border-bottom:1px solid #e2e8f0;flex-wrap:wrap;}
.article-cover{border-radius:12px;overflow:hidden;margin-bottom:30px;}
.article-cover img{width:100%;max-height:480px;object-fit:cover;}
.article-body{font-size:1.05rem;line-height:2;color:var(--slate);}
.article-body img{max-width:100%;border-radius:8px;margin:16px 0;}
.back-bar{margin-top:40px;padding-top:24px;border-top:1px solid #e2e8f0;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;}
.btn-back{padding:10px 28px;border-radius:50px;font-weight:600;transition:all 0.3s;border:2px solid var(--primary);color:var(--primary);background:transparent;}
.btn-back:hover{background:var(--primary);color:#fff;}
.prev-next-link{color:var(--primary);text-decoration:none;font-size:0.9rem;font-weight:600;transition:color 0.3s;max-width:240px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.prev-next-link:hover{color:var(--primary-dark);text-decoration:underline;}
.related-section{padding:60px 0;background:#f8fafc;}
.related-section .section-title{text-align:center;margin-bottom:36px;font-weight:700;color:var(--dark);}
.related-card{background:#fff;border-radius:12px;overflow:hidden;transition:all 0.3s;border:1px solid #e2e8f0;text-decoration:none;display:block;}
.related-card:hover{transform:translateY(-4px);box-shadow:0 12px 40px rgba(0,0,0,0.08);}
.related-card .related-img{height:160px;overflow:hidden;background:#e2e8f0;}
.related-card .related-img img{width:100%;height:100%;object-fit:cover;}
.related-card .related-body{padding:20px;}
.related-card .related-body h6{font-size:0.95rem;font-weight:600;color:var(--dark);margin-bottom:8px;line-height:1.4;}
.related-card .related-body .related-date{font-size:0.8rem;color:var(--gray);}
.related-card .related-body .related-meta{display:flex;gap:12px;flex-wrap:wrap;}
.related-card .related-body .related-meta-item{font-size:0.82rem;color:#64748b;}
.related-card .related-body .related-meta-item i{color:var(--primary);}
.related-card .related-body .related-salary{font-size:0.85rem;font-weight:700;color:#dc2626;}
@media (max-width:768px){.article-card{padding:24px;}.article-card h1{font-size:1.5rem;}.back-bar{justify-content:center;}}

/* ============ 资质证书卡片（index / about 共享） ============ */
.qual-card{background:#fff;border-radius:20px;padding:36px 24px;text-align:center;transition:all 0.35s;border:1px solid #e2e8f0;height:100%;}
.qual-card:hover{transform:translateY(-8px);box-shadow:0 24px 60px rgba(0,0,0,0.1);border-color:var(--primary-light);}
.qual-card{cursor:pointer;}
.qual-icon-wrap{width:72px;height:72px;border-radius:18px;background:var(--primary-light);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:2rem;margin:0 auto 20px;transition:all 0.35s;}
.qual-card:hover .qual-icon-wrap{background:var(--primary);color:#fff;transform:rotateY(180deg);}
.qual-card h5{font-weight:700;font-size:1.1rem;color:var(--dark);margin-bottom:8px;}
.qual-card p{color:var(--gray);font-size:0.9rem;margin:0;}

/* ============ 发展历程时间线（index / about 共享） ============ */
.timeline{position:relative;padding:20px 0;}
.timeline::before{content:'';position:absolute;left:50%;top:0;bottom:0;width:3px;background:var(--primary-light);border-radius:3px;transform:translateX(-50%);}
.timeline-item{position:relative;margin-bottom:50px;width:50%;}
.timeline-item:nth-child(odd){left:0;padding-right:60px;text-align:right;}
.timeline-item:nth-child(even){left:50%;padding-left:60px;text-align:left;}
.timeline-item::before{content:'';position:absolute;top:8px;width:16px;height:16px;border-radius:50%;background:var(--primary);border:4px solid var(--primary-light);z-index:1;}
.timeline-item:nth-child(odd)::before{right:-8px;}
.timeline-item:nth-child(even)::before{left:-8px;}
.timeline-card{background:#fff;border-radius:16px;padding:24px;box-shadow:0 4px 20px rgba(0,0,0,0.04);border:1px solid #e2e8f0;transition:all 0.3s;}
.timeline-card:hover{box-shadow:0 12px 40px rgba(0,0,0,0.08);transform:translateY(-3px);}
.timeline-year{display:inline-block;background:var(--primary);color:#fff;padding:4px 16px;border-radius:20px;font-size:0.85rem;font-weight:700;margin-bottom:10px;}
.timeline-card h5{font-weight:700;color:var(--dark);font-size:1.05rem;margin-bottom:6px;}
.timeline-card p{color:var(--gray);font-size:0.9rem;margin:0;}
@media (max-width:768px){
    .timeline::before{left:20px;}
    .timeline-item{width:100%;left:0!important;padding-left:50px!important;padding-right:0!important;text-align:left!important;margin-bottom:30px;}
    .timeline-item::before{left:11px!important;right:auto!important;}
}

/* ============ 资质证书弹窗 (about.html) ============ */
.qual-modal-content{border-radius:20px;overflow:hidden;}
.qual-modal-icon{width:90px;height:90px;border-radius:22px;background:var(--primary-light);color:var(--primary);display:inline-flex;align-items:center;justify-content:center;margin-bottom:24px;}
.qual-modal-title{color:var(--dark);}
.qual-modal-desc{color:var(--gray);font-size:1.05rem;}

/* ============ 返回顶部 ============ */
.btn-back-to-top{position:fixed;bottom:30px;right:30px;width:44px;height:44px;border-radius:50%;background:var(--primary);color:#fff;border:none;box-shadow:0 4px 16px rgba(26,86,219,0.4);cursor:pointer;display:none;z-index:999;transition:all 0.3s;font-size:1.2rem;}
.btn-back-to-top:hover{background:var(--primary-dark);transform:translateY(-3px);}
.btn-back-to-top:focus-visible{outline:3px solid var(--primary);outline-offset:2px;}

/* ============ 无障碍 Skip Link ============ */
.skip-link{position:absolute;top:-100px;left:0;background:var(--primary);color:#fff;padding:8px 16px;z-index:10000;border-radius:0 0 8px 0;text-decoration:none;font-weight:600;transition:top 0.3s;}
.skip-link:focus{top:0;}