:root{
  --bg:#f6f7fb;
  --card:#ffffff;
  --ink:#1f2430;
  --muted:#8a90a2;
  --line:#ececf2;
  --brand:#4f6ef7;
  --brand-d:#3b56d6;
  --brand-soft:#eef1fe;
  --danger:#e5484d;
  --shadow:0 8px 24px rgba(31,36,48,.08);
  --radius:16px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.6;-webkit-font-smoothing:antialiased;
}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}

/* ---------- 头部 ---------- */
.site-header{
  background:linear-gradient(135deg,#4f6ef7,#7b5cf0);
  color:#fff;padding:46px 0 40px;position:relative;
}
.site-header .brand{margin:0;font-size:30px;font-weight:800;letter-spacing:.5px}
.site-header .slogan{margin:8px 0 0;opacity:.9;font-size:15px}
.admin-link{
  position:absolute;top:18px;right:20px;color:#fff;opacity:.85;
  font-size:13px;text-decoration:none;border:1px solid rgba(255,255,255,.5);
  padding:6px 12px;border-radius:999px;transition:.2s;
}
.admin-link:hover{background:rgba(255,255,255,.15);opacity:1}

/* ---------- 网格 ---------- */
.grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));
  gap:22px;margin:34px 0;
}
.card{
  background:var(--card);border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow);border:1px solid var(--line);
  display:flex;flex-direction:column;transition:transform .18s,box-shadow .18s;
}
.card.clickable{cursor:pointer}
.card.clickable:hover{transform:translateY(-4px);box-shadow:0 14px 32px rgba(31,36,48,.14)}
/* 图片等比例缩放：横图/竖图都完整显示，不拉伸不裁切（contain） */
.card-img{display:block;background:#f0f1f6;aspect-ratio:4/3;overflow:hidden}
.card-img img{width:100%;height:100%;object-fit:contain;display:block}
.card-body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:8px;flex:1}
.card-title{margin:0;font-size:18px;font-weight:700}
.card-title a{color:var(--ink);text-decoration:none}
.card-title a:hover{color:var(--brand)}
.card-desc{margin:0;color:#54596b;font-size:14px;white-space:pre-wrap;word-break:break-word}
.card-cta{
  margin-top:auto;align-self:flex-start;color:var(--brand);font-weight:600;font-size:14px;
  text-decoration:none;
}
.card-cta:hover{color:var(--brand-d)}

/* ---------- 空状态 ---------- */
.empty{text-align:center;padding:80px 20px;color:var(--muted)}
.empty-icon{font-size:54px;margin-bottom:10px}

/* ---------- 悬停放大(显示原图) ---------- */
.imgzoom-host{cursor:zoom-in}
.img-zoom{
  position:fixed;z-index:9999;pointer-events:none;display:none;
  background:#fff;padding:8px;border-radius:12px;
  box-shadow:0 14px 44px rgba(0,0,0,.28);max-width:84vw;max-height:84vh;
}
.img-zoom img{max-width:82vw;max-height:80vh;display:block;border-radius:6px}

/* ---------- 页脚 ---------- */
.site-footer{padding:30px 0;color:var(--muted);font-size:13px;text-align:center}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-block;border:1px solid var(--line);background:#fff;color:var(--ink);
  padding:9px 16px;border-radius:10px;font-size:14px;text-decoration:none;cursor:pointer;
  transition:.18s;font-weight:600;
}
.btn:hover{border-color:#d8dae6}
.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn.primary:hover{background:var(--brand-d)}
.btn.ghost{background:transparent;color:var(--muted)}
.btn.small{padding:6px 12px;font-size:13px}
.btn.danger{border-color:#f3c6c7;color:var(--danger);background:#fff}
.btn.danger:hover{background:#fdeced}

/* ---------- 登录 ---------- */
.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}
.auth-card{
  width:340px;background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);
  padding:32px 28px;display:flex;flex-direction:column;gap:14px;
}
.auth-card h1{margin:0 0 6px;font-size:22px}
.auth-card label{display:flex;flex-direction:column;gap:6px;font-size:13px;color:#54596b;font-weight:600}
.auth-card input{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:10px;font-size:14px;font-weight:400;font-family:inherit}
.auth-card input:focus{outline:none;border-color:var(--brand)}
.auth-card .back{font-size:13px;color:var(--muted);text-align:center;text-decoration:none;margin-top:4px}

/* ---------- 后台 ---------- */
body.admin{background:var(--bg)}
.admin-bar{display:flex;align-items:center;justify-content:space-between;padding:26px 0 18px;flex-wrap:wrap;gap:12px}
.admin-bar h1{margin:0;font-size:24px}
.admin-actions{display:flex;gap:10px;flex-wrap:wrap}
.alert{background:#eafaf0;border:1px solid #c7eccf;color:#1f7a3d;padding:12px 14px;border-radius:10px;font-size:14px;margin-bottom:14px}
.alert:empty{display:none}

.admin-table{width:100%;border-collapse:collapse;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line)}
.admin-table th,.admin-table td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--line);font-size:14px}
.admin-table th{background:#fafbff;color:#54596b;font-weight:600;font-size:13px}
.admin-table tr:last-child td{border-bottom:none}
.admin-table .thumb img{width:56px;height:42px;object-fit:cover;border-radius:8px;display:block}
.admin-table .noimg{color:var(--muted);font-size:12px}
.admin-table .ops{display:flex;gap:8px;white-space:nowrap}
.muted{color:var(--muted)}

/* ---------- 表单 ---------- */
.edit-form{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--line);padding:26px;display:flex;flex-direction:column;gap:18px;max-width:640px}
.edit-form label{display:flex;flex-direction:column;gap:7px;font-size:13px;font-weight:600;color:#54596b}
.edit-form input[type=text],.edit-form input[type=url],.edit-form input[type=number],.edit-form textarea{
  width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:10px;font-size:14px;font-weight:400;font-family:inherit;color:var(--ink);
}
.edit-form textarea{resize:vertical}
.edit-form input:focus,.edit-form textarea:focus{outline:none;border-color:var(--brand)}
.img-preview{display:flex;align-items:center;gap:14px;margin-top:8px}
.img-preview img{width:120px;height:90px;object-fit:cover;border-radius:10px;border:1px solid var(--line)}
.img-preview .chk{font-weight:400;color:var(--danger);display:flex;align-items:center;gap:6px;font-size:13px}
.form-actions{display:flex;gap:10px}

@media(max-width:600px){
  .site-header .brand{font-size:24px}
  .grid{gap:16px}
  .admin-bar{flex-direction:column;align-items:flex-start}
}