:root{--navy:#10195a;--blue:#24349c;--red:#c8202b;--ink:#11182f;--muted:#68718a;--line:#dfe3ee;--bg:#f3f5fa;--white:#fff;--success:#167a55;--danger:#b4232f}*{box-sizing:border-box}html{font-family:"Noto Sans SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg)}body{margin:0}a{color:inherit}.admin-shell{min-height:100vh;display:grid;grid-template-columns:248px 1fr}.sidebar{background:linear-gradient(160deg,var(--navy),var(--blue));color:#fff;padding:28px 20px;position:sticky;top:0;height:100vh;overflow:auto}.brand{font-size:22px;font-weight:800;letter-spacing:.04em;margin:0 0 28px}.brand small{display:block;font-size:11px;letter-spacing:.2em;opacity:.65;margin-top:6px}.sidebar nav{display:grid;gap:5px}.sidebar a{display:block;text-decoration:none;padding:11px 13px;border-left:3px solid transparent;color:#e5e9ff}.sidebar a:hover,.sidebar a.active{background:rgba(255,255,255,.1);border-left-color:#ef3340;color:#fff}.admin-main{min-width:0}.topbar{height:70px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 32px;position:sticky;top:0;z-index:10}.topbar form{margin:0}.content-wrap{padding:30px 32px 60px;max-width:1500px}.page-head{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;margin-bottom:22px}.page-head h1{font-size:28px;margin:0 0 7px}.page-head p{margin:0;color:var(--muted)}.card{background:#fff;border:1px solid var(--line);box-shadow:0 12px 35px rgba(26,37,83,.05);padding:24px;margin-bottom:22px}.grid-stats{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:16px}.stat{padding:21px;background:linear-gradient(135deg,#fff,#f5f7ff);border:1px solid var(--line)}.stat strong{display:block;color:var(--blue);font-size:32px;margin-top:8px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:0 16px;border:0;background:var(--blue);color:#fff;text-decoration:none;font-weight:700;cursor:pointer}.btn:hover{filter:brightness(.94)}.btn-red{background:var(--red)}.btn-ghost{background:#eef1f8;color:var(--ink)}.btn-danger{background:#fff0f1;color:var(--danger);border:1px solid #f4c6ca}.btn-sm{min-height:32px;padding:0 10px;font-size:13px}.actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.actions form{margin:0}.flash{padding:13px 16px;margin-bottom:20px;border-left:4px solid var(--success);background:#eaf8f2;color:#0b6244}.errors{padding:14px 18px;background:#fff0f1;border-left:4px solid var(--danger);color:#8d1721;margin-bottom:20px}.errors ul{margin:5px 0;padding-left:20px}.table-wrap{overflow:auto}.table{width:100%;border-collapse:collapse;min-width:760px}.table th,.table td{text-align:left;border-bottom:1px solid var(--line);padding:13px 11px;vertical-align:middle}.table th{font-size:13px;color:var(--muted);background:#f8f9fc}.badge{display:inline-block;font-size:12px;padding:4px 8px;background:#eef1f8;color:#39425b}.badge.green{background:#e6f6ef;color:#126344}.badge.red{background:#fff0f1;color:#9a1f29}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:19px 22px}.field.full{grid-column:1/-1}.field label{display:block;font-weight:700;margin-bottom:7px}.field .hint{font-size:12px;color:var(--muted);margin-top:6px}.input,.select,.textarea{display:block;width:100%;border:1px solid #cfd5e3;background:#fff;color:var(--ink);padding:11px 12px;font:inherit;border-radius:0}.textarea{min-height:130px;resize:vertical}.textarea.tall{min-height:340px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:14px;line-height:1.7}.checkbox{display:flex;gap:9px;align-items:center;padding-top:31px}.checkbox input{width:18px;height:18px}.filter{display:grid;grid-template-columns:2fr 1fr 1fr auto;gap:10px;margin-bottom:18px}.media-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.media-card{border:1px solid var(--line);background:#fff;padding:10px;min-width:0}.media-card img{width:100%;aspect-ratio:16/9;object-fit:cover;background:#eef1f8}.media-card code{display:block;word-break:break-all;font-size:11px;margin:8px 0}.login-page{min-height:100vh;display:grid;place-items:center;padding:20px;background:radial-gradient(circle at 70% 15%,#3853c8 0,transparent 38%),linear-gradient(150deg,#0d1550,#202f92)}.login-card{background:#fff;width:min(440px,100%);padding:42px;box-shadow:0 28px 70px rgba(0,0,0,.25)}.login-card h1{margin:0 0 6px}.login-card .field{margin:18px 0}.muted{color:var(--muted)}.pagination{margin-top:20px}.settings-group h2{font-size:18px;padding-bottom:10px;border-bottom:1px solid var(--line)}@media(max-width:1050px){.admin-shell{grid-template-columns:1fr}.sidebar{position:relative;height:auto}.sidebar nav{grid-template-columns:repeat(4,1fr)}.topbar{position:relative}.grid-stats{grid-template-columns:repeat(2,1fr)}.media-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:700px){.sidebar nav{grid-template-columns:repeat(2,1fr)}.topbar,.content-wrap{padding-left:18px;padding-right:18px}.topbar{height:auto;min-height:64px;gap:12px}.page-head{display:block}.page-head .actions{margin-top:14px}.form-grid,.filter,.grid-stats{grid-template-columns:1fr}.field.full{grid-column:auto}.media-grid{grid-template-columns:1fr}.login-card{padding:28px}}