:root{
  --bg:#f5f6f8; --card:#fff; --ink:#1d2433; --muted:#6b7385; --line:#e3e6ec;
  --pri:#1f4e79; --pri-2:#2d6aa3; --pri-soft:#e8f0f8; --ok:#1c8a4a; --warn:#b26a00; --bad:#c0392b;
  --lg:#06c755; --radius:10px;
  font-family:"Noto Sans TC","PingFang TC","Microsoft JhengHei",system-ui,sans-serif;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font-size:15px;line-height:1.55}
.hidden{display:none!important}
a{color:var(--pri-2)}
h1{font-size:22px;margin:0 0 4px}
h2{font-size:17px;margin:0 0 12px}
h3{font-size:15px;margin:0 0 8px}
.muted{color:var(--muted)}
.small{font-size:13px}
.err{color:var(--bad);min-height:1.2em;font-size:14px}

/* 登入 */
.login{min-height:100vh;display:grid;place-items:center;padding:20px;background:linear-gradient(160deg,#eef3f9,#f7f8fa)}
.login-card{background:#fff;padding:36px 32px;border-radius:16px;width:min(380px,100%);box-shadow:0 10px 40px rgba(20,40,80,.08);display:flex;flex-direction:column;gap:12px;text-align:center}
.login-card label{text-align:left}
.brand-mark{width:52px;height:52px;border-radius:14px;background:var(--pri);color:#fff;font-weight:800;display:grid;place-items:center;margin:0 auto 6px;letter-spacing:1px}
.brand-mark.sm{width:36px;height:36px;border-radius:10px;font-size:13px;margin:0}

/* 版面 */
.app{display:grid;grid-template-columns:232px 1fr;min-height:100vh}
.side{background:#14243a;color:#cdd6e4;display:flex;flex-direction:column;position:sticky;top:0;height:100vh}
.side-head{display:flex;gap:10px;align-items:center;padding:18px 16px;border-bottom:1px solid rgba(255,255,255,.08)}
.side-title{color:#fff;font-weight:700}
.side-sub{font-size:12px;color:#8fa0b8;max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
nav{display:flex;flex-direction:column;padding:10px 8px;gap:2px;flex:1;overflow:auto}
nav a{color:#cdd6e4;text-decoration:none;padding:9px 12px;border-radius:8px;display:flex;justify-content:space-between;align-items:center}
nav a:hover{background:rgba(255,255,255,.06)}
nav a.on{background:#24406a;color:#fff}
.badge{background:#e74c3c;color:#fff;border-radius:10px;font-size:12px;padding:0 7px;min-width:20px;text-align:center}
.side-foot{padding:14px 16px;border-top:1px solid rgba(255,255,255,.08);display:flex;justify-content:space-between;font-size:13px}
main{padding:28px 32px 60px;max-width:1180px;width:100%}
.page-head{display:flex;justify-content:space-between;align-items:flex-end;gap:12px;margin-bottom:18px;flex-wrap:wrap}
.page-head p{margin:2px 0 0}

/* 元件 */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;margin-bottom:16px}
.grid{display:grid;gap:14px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px}
.stat b{display:block;font-size:26px;line-height:1.2}
.stat span{color:var(--muted);font-size:13px}
label{display:flex;flex-direction:column;gap:5px;font-size:13px;color:var(--muted);font-weight:500}
input,textarea,select{font:inherit;font-size:15px;color:var(--ink);border:1px solid #cfd5df;border-radius:8px;padding:9px 11px;background:#fff;width:100%}
textarea{min-height:90px;resize:vertical}
input:focus,textarea:focus,select:focus{outline:2px solid var(--pri-soft);border-color:var(--pri-2)}
.check{flex-direction:row;align-items:center;gap:8px;color:var(--ink);font-size:14px}
.check input{width:auto}
.btn{font:inherit;font-size:14px;border:1px solid #cfd5df;background:#fff;color:var(--ink);border-radius:8px;padding:8px 14px;cursor:pointer;white-space:nowrap}
.btn:hover{border-color:var(--pri-2)}
.btn.primary{background:var(--pri);border-color:var(--pri);color:#fff}
.btn.primary:hover{background:var(--pri-2)}
.btn.danger{color:var(--bad)}
.btn.sm{padding:4px 10px;font-size:13px}
.btn.wide{width:100%;padding:11px}
.link{background:none;border:0;color:inherit;cursor:pointer;text-decoration:underline;font:inherit}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.right{margin-left:auto}
.pill{display:inline-block;font-size:12px;padding:1px 9px;border-radius:20px;background:#eef1f5;color:#4a5466}
.pill.ok{background:#e5f5ec;color:var(--ok)}
.pill.warn{background:#fdf1e0;color:var(--warn)}
.pill.bad{background:#fbe9e7;color:var(--bad)}
.pill.pri{background:var(--pri-soft);color:var(--pri)}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{text-align:left;padding:9px 8px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:12px;color:var(--muted);font-weight:600}
.notice{background:#fff8e6;border:1px solid #f1d9a0;border-radius:var(--radius);padding:12px 16px;margin-bottom:16px;font-size:14px}
.notice.info{background:var(--pri-soft);border-color:#c9daea}
code,.mono{font-family:ui-monospace,Consolas,monospace;font-size:13px;background:#f0f2f5;padding:2px 6px;border-radius:5px;word-break:break-all}
pre{white-space:pre-wrap;background:#f6f7f9;border:1px solid var(--line);border-radius:8px;padding:12px;font-size:13px;max-height:420px;overflow:auto}
.empty{color:var(--muted);text-align:center;padding:26px}
.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);background:#1d2433;color:#fff;padding:10px 18px;border-radius:24px;font-size:14px;z-index:50}
.modal{position:fixed;inset:0;background:rgba(15,25,40,.45);display:grid;place-items:center;padding:16px;z-index:40}
.modal-card{background:#fff;border-radius:14px;padding:22px;width:min(640px,100%);max-height:88vh;overflow:auto}

/* 機器人 */
.avatar{width:56px;height:56px;border-radius:50%;object-fit:cover;background:#dfe6f0;display:grid;place-items:center;font-weight:700;color:var(--pri);font-size:20px;flex:none}
.avatar.lg{width:88px;height:88px;font-size:30px}
.avatar.xs{width:34px;height:34px;font-size:13px}
.bot-card{display:flex;gap:14px;align-items:center}
.feat{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:8px}
.feat label{border:1px solid var(--line);border-radius:8px;padding:10px 12px}
.section-title{font-size:13px;font-weight:700;color:var(--pri);margin:18px 0 10px;letter-spacing:.5px}
.step{display:flex;gap:10px;margin:8px 0}
.step b{flex:none;width:24px;height:24px;border-radius:50%;background:var(--pri);color:#fff;display:grid;place-items:center;font-size:13px}

/* 里程碑 */
.ms{display:grid;grid-template-columns:150px minmax(0,1.3fr) 110px minmax(0,1fr) auto;gap:8px;align-items:center;padding:6px 0;border-bottom:1px dashed var(--line)}
.ms:last-child{border-bottom:0}
.progress{height:8px;background:#e9edf2;border-radius:6px;overflow:hidden;margin:6px 0 2px}
.progress i{display:block;height:100%;background:var(--ok)}

/* 模擬器：LINE 樣式 */
.sim{display:grid;grid-template-columns:300px 1fr;gap:16px;align-items:start}
.phone{background:#fff;border-radius:22px;border:1px solid var(--line);overflow:hidden;display:flex;flex-direction:column;height:min(720px,calc(100vh - 140px));box-shadow:0 8px 30px rgba(20,40,80,.08)}
.phone-top{background:#fff;border-bottom:1px solid var(--line);padding:12px 16px;font-weight:700;display:flex;justify-content:space-between;align-items:center}
.phone-top small{font-weight:400;color:var(--muted)}
.chat{flex:1;overflow:auto;background:#a8bcd8;padding:14px 12px;display:flex;flex-direction:column;gap:10px}
.msg{display:flex;gap:8px;max-width:86%}
.msg .bubble{background:#fff;border-radius:16px;padding:8px 12px;white-space:pre-wrap;word-break:break-word;font-size:14.5px;box-shadow:0 1px 1px rgba(0,0,0,.05)}
.msg .who{font-size:11.5px;color:#2b3a52;margin:0 0 3px 2px}
.msg.me{align-self:flex-end;flex-direction:row-reverse}
.msg.me .bubble{background:#8de055}
.msg .time{font-size:10.5px;color:#3e4c63;align-self:flex-end;white-space:nowrap}
.sys{align-self:center;background:rgba(0,0,0,.18);color:#fff;font-size:12px;padding:3px 12px;border-radius:12px}
.typing{color:#3e4c63;font-size:13px}
.composer{display:flex;gap:8px;padding:10px;border-top:1px solid var(--line);background:#fff;align-items:center}
.composer input{border-radius:20px}
.at{flex:none;border:1px solid var(--lg);color:var(--lg);background:#fff;border-radius:16px;padding:6px 10px;font-size:13px;cursor:pointer;white-space:nowrap}
.at.on{background:var(--lg);color:#fff}
.send{flex:none;white-space:nowrap;background:var(--lg);border:0;color:#fff;border-radius:20px;padding:9px 16px;font:inherit;font-size:14px;cursor:pointer}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{border:1px solid #cfd5df;background:#fff;border-radius:16px;padding:4px 10px;font-size:13px;cursor:pointer}
.chip:hover{border-color:var(--pri-2);color:var(--pri-2)}

@media (max-width:860px){
  .app{grid-template-columns:1fr}
  .side{position:static;height:auto}
  nav{flex-direction:row;overflow-x:auto;padding:6px}
  nav a{white-space:nowrap}
  .side-foot{display:none}
  main{padding:18px 14px 50px}
  .g2,.g3,.g4,.sim{grid-template-columns:1fr}
  .sim .phone{order:-1;height:70vh}
  .g4{grid-template-columns:repeat(2,1fr)}
  .ms{grid-template-columns:1fr 1fr}
}