* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif; color: #333; background: #f5f6f8; line-height: 1.7; }
a { color: #1d6fb8; text-decoration: none; }
a:hover { color: #0a4f8a; }
.wrap { max-width: 1100px; margin: 0 auto; padding: 0 16px; }

/* 顶部 */
.site-header { background: #0a4f8a; color: #fff; }
.site-header .wrap { display: flex; align-items: center; flex-wrap: wrap; gap: 20px; padding: 14px 16px; }
.logo a { color: #fff; font-size: 20px; font-weight: 700; }
.main-nav { display: flex; flex-wrap: wrap; gap: 4px; }
.main-nav > a, .nav-item > a { color: #fff; padding: 8px 14px; display: inline-block; border-radius: 4px; }
.main-nav > a:hover, .nav-item > a:hover { background: rgba(255,255,255,.15); }
.nav-item { position: relative; }
.sub-nav { display: none; position: absolute; top: 100%; left: 0; background: #fff; min-width: 140px; box-shadow: 0 4px 12px rgba(0,0,0,.15); z-index: 10; border-radius: 4px; overflow: hidden; }
.nav-item:hover .sub-nav { display: block; }
.sub-nav a { display: block; color: #333; padding: 8px 14px; }
.sub-nav a:hover { background: #f0f6fc; }

/* 主体 */
.site-main { background: #fff; min-height: 60vh; padding: 24px 20px; margin-top: 16px; border-radius: 6px; box-shadow: 0 1px 4px rgba(0,0,0,.05); }
.page-title { font-size: 22px; border-left: 4px solid #0a4f8a; padding-left: 10px; margin-bottom: 18px; }
.crumb { color: #888; font-size: 13px; margin-bottom: 14px; }

/* 列表 */
.list-item { display: flex; gap: 14px; padding: 14px 0; border-bottom: 1px dashed #eee; }
.list-item img { width: 120px; height: 90px; object-fit: cover; border-radius: 4px; background: #f0f0f0; flex: none; }
.list-item .meta { color: #999; font-size: 13px; margin-top: 6px; }
.list-item h3 { font-size: 16px; font-weight: 600; }
.empty { color: #999; padding: 30px 0; text-align: center; }

/* 详情 */
.detail h1 { font-size: 24px; margin-bottom: 10px; }
.detail .info { color: #999; font-size: 13px; margin-bottom: 18px; border-bottom: 1px solid #eee; padding-bottom: 10px; }
.detail .content { font-size: 15px; }
.detail .content img { max-width: 100%; }

/* 表单 */
.form-box { max-width: 520px; }
.form-box label { display: block; margin: 12px 0 4px; font-weight: 600; }
.form-box input[type=text], .form-box input[type=password], .form-box textarea {
  width: 100%; padding: 9px 10px; border: 1px solid #ccc; border-radius: 4px; font: inherit;
}
.form-box textarea { min-height: 110px; }
.btn { display: inline-block; background: #0a4f8a; color: #fff; border: none; padding: 9px 20px; border-radius: 4px; cursor: pointer; font-size: 15px; }
.btn:hover { background: #08406f; }
.msg { padding: 10px 12px; border-radius: 4px; margin: 10px 0; }
.msg.ok { background: #e6f7ec; color: #1a7f43; }
.msg.err { background: #fdecea; color: #c0392b; }

/* 分页 */
.pager { margin: 20px 0; text-align: center; }
.pager a, .pager .current { display: inline-block; padding: 6px 12px; margin: 0 3px; border: 1px solid #ddd; border-radius: 4px; }
.pager .current { background: #0a4f8a; color: #fff; border-color: #0a4f8a; }

/* 卡片网格 */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px,1fr)); gap: 16px; }
.card img { width: 100%; height: 150px; object-fit: cover; border-radius: 4px; background: #f0f0f0; }
.card h3 { font-size: 15px; margin-top: 8px; }

/* 页脚 */
.site-footer { background: #222; color: #aaa; margin-top: 24px; padding: 24px 0; font-size: 13px; }
.site-footer a { color: #7fb3e0; }
.friend-links a { margin-right: 12px; }
.copyright { margin-top: 12px; color: #777; }

/* 后台 */
.admin-wrap { max-width: 980px; margin: 20px auto; padding: 0 16px; }
.admin-bar { background: #0a4f8a; color: #fff; padding: 10px 16px; display: flex; justify-content: space-between; align-items: center; border-radius: 6px 6px 0 0; }
.admin-bar a { color: #fff; }
.admin-side { width: 180px; float: left; background: #f3f5f8; min-height: 400px; padding: 12px; border-right: 1px solid #e2e6ea; }
.admin-side a { display: block; padding: 8px 10px; border-radius: 4px; color: #333; }
.admin-side a:hover, .admin-side a.active { background: #0a4f8a; color: #fff; }
.admin-main { margin-left: 204px; padding: 16px; background: #fff; border: 1px solid #e2e6ea; border-radius: 0 0 6px 6px; }
table.adm { width: 100%; border-collapse: collapse; font-size: 14px; }
table.adm th, table.adm td { border: 1px solid #eee; padding: 8px 10px; text-align: left; }
table.adm th { background: #f3f5f8; }
@media (max-width: 720px) {
  .admin-side { float: none; width: auto; min-height: 0; border-right: none; border-bottom: 1px solid #e2e6ea; }
  .admin-main { margin-left: 0; }
  .list-item img { width: 90px; height: 68px; }
}