:root{--blue:#2563eb;--blue-d:#1d4ed8;--blue-l:#eff4ff;--ink:#0f172a;--ink-2:#475569;--ink-3:#8896a8;--line:#e4ebf6;--bg:#f4f7fd;--card:#fff;--ok:#16a34a;--warn:#e6a23c;--err:#dc2626;--r:14px;--sh:0 10px 30px rgba(15,23,42,.06)}
*{box-sizing:border-box}
html,body{margin:0;padding:0;height:100%}
body{background:var(--bg);color:var(--ink);font:14px/1.6 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer}
input,select,textarea{font:inherit}
.hide{display:none!important}
/* ---------- 通用组件 ---------- */
.btn{display:inline-flex;align-items:center;gap:6px;border:1px solid transparent;background:var(--blue);color:#fff;padding:9px 16px;border-radius:10px;font-weight:500;transition:.18s}
.btn:hover{background:var(--blue-d)}
.btn.ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn.ghost:hover{background:var(--blue-l);color:var(--blue)}
.btn.danger{background:#fff;color:var(--err);border-color:#fadcdc}
.btn.sm{padding:6px 12px;font-size:13px;border-radius:8px}
.btn[disabled]{opacity:.55;cursor:not-allowed}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh);padding:20px}
.card.glass{background:linear-gradient(180deg,rgba(255,255,255,.92),rgba(255,255,255,.78));backdrop-filter:blur(12px)}
.card__head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}
.card__head h3{margin:0;font-size:16px}
.card__head p{margin:2px 0 0;color:var(--ink-3);font-size:12px}
.grid{display:grid;gap:16px}
.grid.c2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid.c4{grid-template-columns:repeat(4,minmax(0,1fr))}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.field label{font-size:13px;color:var(--ink-2);font-weight:500}
.field .hint{font-size:12px;color:var(--ink-3)}
.input{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:10px;outline:none;background:#fff;transition:.16s}
.input:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(37,99,235,.12)}
.tag{display:inline-flex;align-items:center;padding:2px 9px;border-radius:999px;font-size:12px;background:var(--blue-l);color:var(--blue)}
.tag.ok{background:#e9f9ef;color:var(--ok)}
.tag.warn{background:#fdf4e7;color:var(--warn)}
.tag.err{background:#fdecec;color:var(--err)}
.tag.gray{background:#f1f5f9;color:var(--ink-3)}
.table{width:100%;border-collapse:separate;border-spacing:0;font-size:13px}
.table th{text-align:left;color:var(--ink-3);font-weight:500;padding:10px 12px;border-bottom:1px solid var(--line);white-space:nowrap}
.table td{padding:12px;border-bottom:1px solid #f2f6fc;vertical-align:middle}
.table tr:last-child td{border-bottom:none}
.table .num{font-variant-numeric:tabular-nums;font-weight:600}
.empty{padding:34px 16px;text-align:center;color:var(--ink-3)}
.empty strong{display:block;color:var(--ink);margin-bottom:6px;font-size:15px}
.alert{display:flex;gap:10px;padding:12px 14px;border-radius:12px;background:var(--blue-l);color:#1e3a8a;font-size:13px;line-height:1.7;margin-bottom:14px}
.alert.warn{background:#fdf6ec;color:#8a5a00}
.alert.err{background:#fdecec;color:#8a1f1f}
.toast{position:fixed;top:18px;left:50%;transform:translateX(-50%);background:#0f172a;color:#fff;padding:10px 18px;border-radius:10px;z-index:99;box-shadow:var(--sh);font-size:13px}
.toast.err{background:#b91c1c}
/* ---------- 登录页 ---------- */
.auth{min-height:100vh;display:grid;grid-template-columns:1.05fr .95fr}
.auth__left{background:linear-gradient(135deg,#1d4ed8,#2563eb 55%,#3b82f6);color:#fff;padding:56px 60px;display:flex;flex-direction:column;justify-content:space-between;position:relative;overflow:hidden}
.auth__left:after{content:"";position:absolute;width:520px;height:520px;border-radius:50%;background:rgba(255,255,255,.09);right:-160px;bottom:-200px}
.auth__brand{font-size:20px;font-weight:600;letter-spacing:.5px}
.auth__title{font-size:34px;font-weight:600;line-height:1.35;margin:0 0 14px}
.auth__sub{opacity:.88;font-size:15px;max-width:430px;line-height:1.9}
.auth__points{display:flex;flex-direction:column;gap:10px;margin-top:26px;font-size:14px;opacity:.95}
.auth__right{display:flex;align-items:center;justify-content:center;padding:40px}
.auth__box{width:100%;max-width:420px}
.auth__box h2{margin:0 0 6px;font-size:22px}
.auth__box .sub{color:var(--ink-3);font-size:13px;margin:0 0 20px}
.tabs{display:flex;gap:6px;background:#eef3fb;padding:5px;border-radius:12px;margin-bottom:18px}
.tabs button{flex:1;border:none;background:transparent;padding:9px;border-radius:9px;color:var(--ink-2);font-size:13px}
.tabs button.on{background:#fff;color:var(--blue);box-shadow:0 2px 8px rgba(15,23,42,.06);font-weight:600}
/* ---------- 控制台布局 ---------- */
.shell{display:grid;grid-template-columns:236px 1fr;min-height:100vh}
.side{background:#fff;border-right:1px solid var(--line);padding:18px 14px;display:flex;flex-direction:column;gap:6px;position:sticky;top:0;height:100vh}
.side__brand{display:flex;align-items:center;gap:10px;padding:6px 8px 16px}
.logo{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,#2563eb,#60a5fa);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}
.side__brand b{font-size:15px}
.side__brand span{display:block;font-size:11px;color:var(--ink-3)}
.nav{display:flex;flex-direction:column;gap:2px;overflow:auto}
.nav a{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;color:var(--ink-2);font-size:13.5px}
.nav a:hover{background:var(--blue-l);color:var(--blue)}
.nav a.on{background:var(--blue);color:#fff;font-weight:500}
.nav__group{font-size:11px;color:var(--ink-3);padding:14px 12px 6px;letter-spacing:.4px}
.side__foot{margin-top:auto;border-top:1px solid var(--line);padding-top:12px;font-size:12px;color:var(--ink-3)}
.main{display:flex;flex-direction:column;min-width:0}
.top{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:14px 24px;background:rgba(255,255,255,.82);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.top h1{margin:0;font-size:17px}
.top .crumb{font-size:12px;color:var(--ink-3)}
.top__right{display:flex;align-items:center;gap:12px}
.who{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-2)}
.avatar{width:30px;height:30px;border-radius:50%;background:var(--blue-l);color:var(--blue);display:flex;align-items:center;justify-content:center;font-weight:600}
.content{padding:22px 24px 40px;display:flex;flex-direction:column;gap:18px}
.stat{display:flex;flex-direction:column;gap:6px}
.stat span{font-size:12.5px;color:var(--ink-3)}
.stat b{font-size:26px;font-variant-numeric:tabular-nums}
.stat i{font-size:12px;color:var(--ink-3);font-style:normal}
/* ---------- 工作台（三栏） ---------- */
.wb{display:grid;grid-template-columns:260px 1fr 300px;height:100vh;background:var(--bg)}
.wb__col{display:flex;flex-direction:column;min-width:0;border-right:1px solid var(--line);background:#fff}
.wb__col:last-child{border-right:none}
.wb__head{padding:14px 16px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:8px}
.wb__list{overflow:auto;flex:1}
.conv{padding:12px 14px;border-bottom:1px solid #f3f7fd;cursor:pointer}
.conv:hover{background:var(--blue-l)}
.conv.on{background:var(--blue-l);border-left:3px solid var(--blue)}
.conv__top{display:flex;justify-content:space-between;gap:8px;font-size:13.5px;font-weight:500}
.conv__msg{color:var(--ink-3);font-size:12.5px;margin-top:2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.wb__chat{background:linear-gradient(180deg,#f7faff,#f2f6fd);display:flex;flex-direction:column;flex:1;min-width:0}
.msgs{flex:1;overflow:auto;padding:18px;display:flex;flex-direction:column;gap:12px}
.msg{max-width:min(560px,72%);padding:10px 14px;border-radius:14px;font-size:13.5px;line-height:1.7;box-shadow:0 2px 8px rgba(15,23,42,.04)}
.msg.in{background:#fff;border:1px solid var(--line);border-top-left-radius:4px}
.msg.out{background:var(--blue);color:#fff;align-self:flex-end;border-top-right-radius:4px}
.msg time{display:block;font-size:11px;opacity:.6;margin-top:4px}
.composer{border-top:1px solid var(--line);background:#fff;padding:12px 14px;display:flex;flex-direction:column;gap:10px}
.composer textarea{min-height:64px;resize:vertical;border:1px solid var(--line);border-radius:12px;padding:10px 12px;outline:none}
.composer textarea:focus{border-color:var(--blue)}
.composer__row{display:flex;justify-content:space-between;align-items:center;gap:10px}
.drawer-btn{display:none}
/* ---------- 弹窗 ---------- */
.mask{position:fixed;inset:0;background:rgba(15,23,42,.45);display:flex;align-items:center;justify-content:center;z-index:80;padding:20px}
.modal{background:#fff;border-radius:16px;box-shadow:0 24px 60px rgba(15,23,42,.2);width:100%;max-width:520px;max-height:90vh;overflow:auto}
.modal__head{padding:18px 22px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center}
.modal__head h3{margin:0;font-size:16px}
.modal__body{padding:20px 22px}
.modal__foot{padding:16px 22px;border-top:1px solid var(--line);display:flex;justify-content:flex-end;gap:10px}
/* ---------- 入口页 ---------- */
.entry{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;background:linear-gradient(160deg,#eef4ff,#f7faff 60%,#fff)}
.entry__card{width:100%;max-width:460px;background:#fff;border-radius:18px;box-shadow:0 18px 44px rgba(15,23,42,.1);padding:32px;text-align:center}
.entry__card h2{margin:14px 0 8px;font-size:20px}
.entry__card p{color:var(--ink-2);font-size:13.5px;line-height:1.9;margin:0 0 8px}
.entry__logo{width:54px;height:54px;border-radius:16px;background:linear-gradient(135deg,#2563eb,#60a5fa);margin:0 auto;display:flex;align-items:center;justify-content:center;color:#fff;font-size:22px;font-weight:700}
/* ---------- 响应式 ---------- */
@media (max-width:960px){
  .auth{grid-template-columns:1fr}
  .auth__left{display:none}
  .shell{grid-template-columns:1fr}
  .side{position:fixed;z-index:60;left:-260px;transition:.22s;width:236px}
  .side.open{left:0;box-shadow:0 20px 60px rgba(15,23,42,.25)}
  .drawer-btn{display:inline-flex}
  .grid.c4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid.c2{grid-template-columns:1fr}
  .wb{grid-template-columns:1fr;height:auto;min-height:100vh}
  .wb__col{border-right:none;border-bottom:1px solid var(--line)}
  .wb__side{display:none}
  .wb__side.show{display:flex}
  .content{padding:16px 14px 32px}
  .top{padding:12px 14px}
  .table-wrap{overflow-x:auto}
}