/* ═══════════ 全局 ═══════════ */
*,*::before,*::after{box-sizing:border-box}
body{font-family:"Microsoft YaHei","PingFang SC","Helvetica Neue",sans-serif;margin:0;padding:0;color:#333;background:#f8f9fa;line-height:1.7}
a{color:#1a7a3a;text-decoration:none}
a:hover{color:#15632e}
img{max-width:100%}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* ── 页头 ── */
.site-header{background:linear-gradient(135deg,#1a3a2a 0%,#1a7a3a 100%);color:#fff;padding:0}
.site-header .header-inner{display:flex;justify-content:space-between;align-items:center;padding:16px 0;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px}
.site-header .logo{font-size:22px;font-weight:700;color:#fff}
.site-header .logo small{font-size:13px;font-weight:400;opacity:.8;display:block}
.site-header nav a{color:rgba(255,255,255,.9);margin-left:24px;font-size:15px}
.site-header nav a:hover{color:#fff}

/* ── 页脚 ── */
.site-footer{background:#1a1a2e;color:#aaa;text-align:center;padding:30px 20px;font-size:14px;margin-top:60px}
.site-footer a{color:#aaa}
.site-footer a:hover{color:#fff}

/* ── Hero ── */
.hero{background:linear-gradient(135deg,#1a7a3a 0%,#0d4a1f 100%);color:#fff;padding:80px 20px;text-align:center}
.hero h1{font-size:42px;margin:0 0 16px;font-weight:700}
.hero p{font-size:18px;opacity:.9;max-width:700px;margin:0 auto;line-height:1.8}

/* ── 板块通用 ── */
.section{padding:60px 0}
.section-title{text-align:center;font-size:30px;color:#1a3a2a;margin-bottom:8px}
.section-sub{text-align:center;color:#999;margin-bottom:40px;font-size:16px}

/* ── 卡片 ── */
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.card{background:#fff;border-radius:10px;box-shadow:0 1px 4px rgba(0,0,0,.06);overflow:hidden;transition:transform .2s,box-shadow .2s}
.card:hover{transform:translateY(-2px);box-shadow:0 4px 16px rgba(0,0,0,.08)}
.card-body{padding:20px}
.card-title{font-size:18px;font-weight:600;margin-bottom:8px;color:#1a3a2a}
.card-text{color:#666;font-size:14px;line-height:1.6}
.card-meta{color:#999;font-size:13px;margin-top:12px}

/* ── 学校卡片 ── */
.school-card .school-level{display:inline-block;padding:2px 10px;border-radius:12px;font-size:12px;margin-bottom:8px}
.school-level.level-1{background:#fff3cd;color:#856404}
.school-level.level-2{background:#d4edda;color:#155724}
.school-level.level-new{background:#d1ecf1;color:#0c5460}
.school-card .school-tags{margin-top:8px}
.school-card .school-tags span{display:inline-block;background:#f0f0f0;color:#666;padding:2px 8px;border-radius:4px;font-size:12px;margin-right:4px}

/* ── 文章卡片 ── */
.article-card .article-cover{height:180px;background:#e9ecef;display:flex;align-items:center;justify-content:center;color:#aaa;font-size:40px}
.article-card .article-cover img{width:100%;height:100%;object-fit:cover}
.article-card .article-pinned{display:inline-block;background:#e74c3c;color:#fff;padding:1px 6px;border-radius:3px;font-size:11px;margin-right:6px}

/* ── 学校主页 ── */
.school-hero{background:linear-gradient(135deg,#1a3a2a 0%,#1a7a3a 100%);color:#fff;padding:60px 20px}
.school-hero h1{font-size:36px;margin:0 0 8px}
.school-hero .school-info{opacity:.9;font-size:15px}
.school-hero .school-level{display:inline-block;background:rgba(255,255,255,.2);padding:4px 16px;border-radius:20px;font-size:14px;margin-bottom:12px}

/* ── 文章详情 ── */
.article-detail{max-width:800px;margin:40px auto;background:#fff;padding:40px;border-radius:10px;box-shadow:0 1px 4px rgba(0,0,0,.06)}
.article-detail h1{font-size:28px;color:#1a3a2a;margin:0 0 12px}
.article-detail .article-meta{color:#999;font-size:14px;margin-bottom:30px;padding-bottom:20px;border-bottom:1px solid #eee}
.article-detail .article-content{font-size:16px;line-height:1.9}
.article-detail .article-content p{margin:0 0 16px}
.article-detail .article-content img{max-width:100%;border-radius:8px;margin:16px 0}
.article-detail .article-content table{width:100%;border-collapse:collapse;margin:16px 0}
.article-detail .article-content td,.article-detail .article-content th{border:1px solid #dee2e6;padding:10px}

/* ── 筛选栏 ── */
.filter-bar{background:#fff;padding:16px 20px;border-radius:10px;box-shadow:0 1px 4px rgba(0,0,0,.06);margin-bottom:24px;display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.filter-bar select,.filter-bar input{padding:8px 12px;border:1px solid #d9d9d9;border-radius:6px;font-size:14px}
.filter-bar .filter-tag{display:inline-block;padding:6px 16px;border-radius:20px;font-size:14px;cursor:pointer;color:#666;background:#f0f0f0;text-decoration:none}
.filter-bar .filter-tag.active{background:#1a7a3a;color:#fff}

/* ── 题库下载 ── */
.file-list{list-style:none;padding:0}
.file-item{background:#fff;padding:16px 20px;border-radius:8px;box-shadow:0 1px 3px rgba(0,0,0,.05);margin-bottom:10px;display:flex;justify-content:space-between;align-items:center}
.file-item .file-title{font-weight:500;color:#333}
.file-item .file-meta{color:#999;font-size:13px}
.file-item .file-download{background:#1a7a3a;color:#fff;padding:6px 16px;border-radius:6px;font-size:14px;text-decoration:none}
.file-item .file-download:hover{background:#15632e}
.file-icon{width:40px;height:40px;border-radius:8px;display:inline-flex;align-items:center;justify-content:center;margin-right:12px;font-size:20px}
.file-icon.pdf{background:#fce4ec;color:#e91e63}
.file-icon.doc{background:#e3f2fd;color:#1976d2}
.file-icon.img{background:#e8f5e9;color:#4caf50}

/* ── 面包屑 ── */
.breadcrumb{padding:16px 0;color:#999;font-size:14px}
.breadcrumb a{color:#1a7a3a}
.breadcrumb span{color:#999}

/* ── 分页 ── */
.pagination{text-align:center;padding:30px 0}
.pagination a,.pagination span{display:inline-block;padding:8px 16px;border:1px solid #dee2e6;margin:0 4px;border-radius:6px;color:#666;text-decoration:none}
.pagination a:hover{background:#1a7a3a;color:#fff;border-color:#1a7a3a}
.pagination .current{background:#1a7a3a;color:#fff;border-color:#1a7a3a}

/* ── 响应式 ── */
@media(max-width:768px){
    .site-header .header-inner{flex-direction:column;gap:12px}
    .hero h1{font-size:28px}
    .article-detail{padding:20px}
    .card-grid{grid-template-columns:1fr}
    .file-item{flex-direction:column;gap:10px;text-align:center}
}