:root{
  --blue:#234382; --blue2:#4b6ebc; --blue-light:#6690e0;
  --red:#E62129; --gold:#CCAC69; --text:#444; --gray:#999;
  --bg:#f5f6f8; --line:#e6e6e6;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB",sans-serif;color:var(--text);background:var(--bg);font-size:14px;line-height:1.7}
a{color:inherit;text-decoration:none}
.wrap{width:1200px;max-width:94%;margin:0 auto}

/* 站点 chrome */
.topbar{background:#1c2c50;color:#cdd8ee;font-size:13px;height:36px;line-height:36px}
.topbar .wrap{display:flex;justify-content:flex-end;gap:18px}
.topbar a:hover{color:var(--gold)}
header{background:#fff;border-bottom:3px solid var(--gold)}
.head-inner{display:flex;align-items:center;padding:14px 0;gap:18px}
.logo{height:62px;width:auto}
.title h1{font-size:26px;color:var(--blue);letter-spacing:1px;font-weight:700}
.title p{font-size:13px;color:var(--gray);letter-spacing:3px;margin-top:2px}
nav.main{background:var(--blue)}
nav.main .wrap{display:flex}
nav.main a{flex:1;text-align:center;color:#fff;font-size:17px;line-height:54px;position:relative;transition:.2s}
nav.main a:not(:last-child)::after{content:"";position:absolute;right:0;top:17px;height:20px;width:1px;background:rgba(255,255,255,.18)}
nav.main a:hover,nav.main a.active{background:var(--red)}
.cx-wrap{min-height:60vh;background:var(--bg)}
footer{background:#1c2c50;color:#b9c6e0;padding:34px 0 22px;font-size:13px;margin-top:30px}
footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px}
footer h5{color:#fff;font-size:16px;margin-bottom:14px}
footer a:hover{color:var(--gold)}
footer .copy{border-top:1px solid rgba(255,255,255,.12);margin-top:24px;padding-top:16px;text-align:center;color:#8fa0c4;line-height:2}

/* 检索页 */
.sec-head{display:flex;align-items:flex-end;gap:12px;margin-bottom:26px}
.sec-head h3{font-size:24px;color:var(--blue);font-weight:700;position:relative;padding-left:14px}
.sec-head h3::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:5px;background:var(--red)}
.sec-head .en{color:var(--gold);font-size:13px;letter-spacing:2px;text-transform:uppercase}
.sec-head .more{margin-left:auto;color:var(--gray);font-size:13px}
.sec-head .more:hover{color:var(--red)}
.cat-hero{background:linear-gradient(135deg,#234382,#3a5ca8);color:#fff;padding:30px 0}
.cat-hero h2{font-size:26px;font-weight:700;margin-bottom:6px}
.cat-hero p{color:#dde6f7;font-size:14px;margin-bottom:18px}
.cat-search{display:flex;max-width:760px;height:52px;background:#fff;border-radius:8px;overflow:hidden;box-shadow:0 8px 24px rgba(0,0,0,.18)}
.cat-search input{flex:1;border:0;outline:0;padding:0 18px;font-size:16px}
.cat-search button{width:120px;border:0;background:var(--gold);color:#3a2f12;font-size:17px;font-weight:700;cursor:pointer}
.cat-search button:hover{background:#e0c483}
.cat-filters{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.cat-filters button{border:1px solid rgba(255,255,255,.45);background:rgba(255,255,255,.12);color:#fff;font-size:13px;padding:6px 16px;border-radius:20px;cursor:pointer;transition:.2s}
.cat-filters button:hover{background:rgba(255,255,255,.25)}
.cat-filters button.on{background:var(--gold);color:#3a2f12;border-color:var(--gold);font-weight:700}
.cat-body{padding:34px 0 50px}
.cat-meta{display:flex;align-items:center;gap:12px;margin-bottom:18px;color:var(--gray);font-size:14px}
.cat-meta b{color:var(--blue);font-size:18px}
.cat-meta select{margin-left:auto;border:1px solid var(--line);border-radius:6px;padding:7px 12px;font-size:14px;color:#444;background:#fff}
.book-list{display:flex;flex-direction:column;gap:14px}
.row{background:#fff;border:1px solid var(--line);border-left:4px solid var(--blue);border-radius:8px;padding:16px 20px;display:grid;grid-template-columns:56px 1fr auto;gap:18px;align-items:center;transition:.2s}
.row:hover{box-shadow:0 6px 18px rgba(35,67,130,.12);transform:translateY(-2px)}
.row .cls{width:56px;height:56px;border-radius:8px;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;flex:0 0 56px}
.row .info h4{font-size:18px;color:var(--blue);margin-bottom:5px}
.row .info h4 a:hover{color:var(--red)}
.row .info .meta{font-size:13px;color:#666}
.row .info .meta span{margin-right:14px}
.row .info .call{margin-top:6px;font-size:13px;color:var(--gray)}
.row .info .call b{color:#333;font-family:"Consolas",monospace}
.row .side{text-align:right;flex:0 0 130px}
.row .side .loc{font-size:13px;color:#555;margin-bottom:8px}
.status{display:inline-block;font-size:12px;font-weight:700;padding:4px 12px;border-radius:20px}
.status.in{background:#e7f4ea;color:#1f8a3b;border:1px solid #b9e0c4}
.status.out{background:#fdeee0;color:#c5631a;border:1px solid #f3cfa3}
.status.ref{background:#e8eefc;color:#2a55b8;border:1px solid #b9cdf3}
.empty{text-align:center;color:var(--gray);padding:60px 0;font-size:15px}
.empty span{display:block;font-size:40px;margin-bottom:10px}
.hint{background:#eef3fb;border:1px solid #cdddf6;color:#2a4d8f;padding:14px 18px;border-radius:8px;font-size:13px;line-height:1.9;margin-bottom:24px}
.hint b{color:var(--blue)}
.hint code{background:#fff;border:1px solid var(--line);border-radius:4px;padding:1px 7px;font-family:Consolas,monospace;color:var(--red)}

/* 管理后台 */
.panel{padding:30px 0 60px;display:none}
.panel.show{display:block}
.login{position:fixed;inset:0;background:rgba(15,28,58,.92);display:flex;align-items:center;justify-content:center;z-index:99}
.login .card{background:#fff;border-radius:12px;padding:38px 40px;width:380px;max-width:90%;box-shadow:0 20px 60px rgba(0,0,0,.4)}
.login h3{color:var(--blue);font-size:22px;text-align:center;margin-bottom:6px}
.login .sub{text-align:center;color:var(--gray);font-size:13px;margin-bottom:22px}
.login input{width:100%;height:46px;border:1px solid var(--line);border-radius:8px;padding:0 14px;font-size:15px;outline:0;margin-bottom:14px}
.login input:focus{border-color:var(--blue)}
.login button{width:100%;height:46px;border:0;border-radius:8px;background:var(--blue);color:#fff;font-size:16px;font-weight:700;cursor:pointer;margin-bottom:10px}
.login button:hover{background:var(--red)}
.login .tip{font-size:12px;color:#8a6d2f;background:#fff7e9;border:1px solid #f0d9a8;border-radius:6px;padding:8px 12px;line-height:1.6}
.login .chg{margin-top:12px;text-align:center;font-size:13px;color:var(--blue);cursor:pointer}
.login .chg:hover{color:var(--red)}
.login .err{color:var(--red);font-size:13px;text-align:center;min-height:18px;margin-bottom:8px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:26px}
.stat{background:#fff;border:1px solid var(--line);border-radius:10px;padding:18px 16px;text-align:center}
.stat b{display:block;font-size:30px;color:var(--blue)}
.stat span{font-size:13px;color:var(--gray)}
.stat.s-in b{color:#1f8a3b}.stat.s-out b{color:#c5631a}.stat.s-ref b{color:#2a55b8}
.card-box{background:#fff;border:1px solid var(--line);border-radius:10px;padding:22px 24px;margin-bottom:24px}
.card-box h4{color:var(--blue);font-size:18px;margin-bottom:16px;border-left:4px solid var(--red);padding-left:10px}
.form-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px 18px}
.form-grid label{display:block;font-size:13px;color:#555;margin-bottom:5px}
.form-grid input,.form-grid select{width:100%;height:40px;border:1px solid var(--line);border-radius:6px;padding:0 12px;font-size:14px;outline:0;background:#fff;color:#444}
.form-grid input:focus,.form-grid select:focus{border-color:var(--blue)}
.form-grid .full{grid-column:1/4}
.form-acts{display:flex;gap:12px;margin-top:18px}
.form-acts button{height:44px;padding:0 26px;border:0;border-radius:8px;font-size:15px;font-weight:700;cursor:pointer}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--red)}
.btn-ghost{background:#fff;color:var(--blue);border:1px solid var(--blue-light)!important}
.btn-ghost:hover{background:var(--blue);color:#fff}
.isbn-row{background:#f0f5ff;border:1px solid #cdddf6;border-radius:8px;padding:12px 14px;margin-bottom:14px}
.isbn-row>label{color:var(--blue);font-weight:600}
.isbn-line{display:flex;gap:10px;margin-top:6px}
.isbn-line input{flex:1;height:42px;border:1px solid var(--blue-light);border-radius:6px;padding:0 14px;font-size:15px;outline:0;letter-spacing:1px}
.isbn-line input:focus{border-color:var(--blue)}
.isbn-line button{height:42px;padding:0 20px;border:1px solid var(--blue-light);background:#fff;color:var(--blue);border-radius:6px;font-size:14px;font-weight:700;cursor:pointer;white-space:nowrap}
.isbn-line button:hover{background:var(--blue);color:#fff}
.isbn-line button:disabled{opacity:.5;cursor:default}
.isbn-tip{font-size:12px;color:#2a4d8f;margin-top:7px;min-height:16px}
.isbn-tip.ok{color:#1f8a3b}.isbn-tip.err{color:#c0392b}
.note{background:#eef3fb;border:1px solid #cdddf6;color:#2a4d8f;padding:12px 16px;border-radius:8px;font-size:13px;line-height:1.9;margin-bottom:20px}
.note b{color:var(--blue)}
.toolbar{display:flex;align-items:center;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.toolbar .grow{flex:1}
.toolbar .btn{display:inline-block;border:1px solid var(--blue-light);background:#fff;color:var(--blue);border-radius:6px;padding:9px 18px;font-size:14px;cursor:pointer;font-weight:600}
.toolbar .btn:hover{background:var(--blue);color:#fff}
.toolbar button{height:40px;padding:0 18px;border:1px solid var(--line);background:#fff;color:#444;border-radius:6px;font-size:14px;cursor:pointer}
.toolbar button:hover{border-color:var(--blue);color:var(--blue)}
.toolbar button.danger{color:var(--red);border-color:#f0b9bc}
.toolbar button.danger:hover{background:var(--red);color:#fff;border-color:var(--red)}
.tbl{width:100%;background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden;border-collapse:collapse;font-size:13px}
.tbl th,.tbl td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--line)}
.tbl th{background:var(--blue);color:#fff;font-weight:600;font-size:13px}
.tbl tbody tr:hover{background:#f7f9fd}
.tbl .idx{color:var(--gray);font-family:Consolas,monospace}
.tbl .op a{color:var(--blue);margin-right:10px;cursor:pointer}
.tbl .op a:hover{color:var(--red)}
.tbl .st{display:inline-block;font-size:12px;font-weight:700;padding:2px 10px;border-radius:20px}
.tbl .st.in{background:#e7f4ea;color:#1f8a3b}
.tbl .st.out{background:#fdeee0;color:#c5631a}
.tbl .st.ref{background:#e8eefc;color:#2a55b8}

@media(max-width:860px){
  .wrap{width:94%}
  .head-inner{flex-wrap:wrap}
  nav.main .wrap{flex-wrap:wrap}nav.main a{flex:1 0 33%}
  .row{grid-template-columns:48px 1fr;gap:12px}
  .row .side{grid-column:1/3;flex:1;text-align:left;display:flex;align-items:center;gap:14px;margin-top:6px}
  .row .side .loc{margin-bottom:0}
  .form-grid{grid-template-columns:1fr}
  .form-grid .full{grid-column:1/1}
  .stats{grid-template-columns:repeat(2,1fr)}
  .cat-filters button{flex:1 0 auto}
}