:root{
  --sand:#f4eee2; --paper:#fffdf8; --ink:#2a2620; --soft:#6f6656; --faint:#9a9078;
  --tray:#1f6b7d; --tray-deep:#164e5c; --clay:#a9603c; --line:#e2d8c6; --ok:#2f7d54; --err:#b4472e;
}
*{box-sizing:border-box}
body{margin:0;background:var(--sand);color:var(--ink);
  font-family:"PingFang TC","Noto Sans TC","Microsoft JhengHei",-apple-system,sans-serif;line-height:1.7}
a{color:var(--tray)}
.topbar{display:flex;justify-content:space-between;align-items:center;padding:14px 22px;
  background:var(--paper);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.brand{font-weight:700}
.brand span{color:var(--soft);font-weight:400;font-size:13px;margin-left:6px}
.topnav a{margin-left:16px;text-decoration:none;font-size:14px}
.wrap{max-width:940px;margin:0 auto;padding:30px 20px 60px}
.foot{text-align:center;color:var(--faint);font-size:12.5px;padding:26px}
h1{font-size:24px;margin:0 0 4px}
h2.sec{font-size:18px;margin:34px 0 6px;padding-top:10px;border-top:1px solid var(--line)}
.muted{color:var(--soft)} .small{font-size:13px} .hello{margin-bottom:20px}
.card{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:22px;margin:16px 0}
.card.auth{max-width:400px;margin:8vh auto}
.card-label{font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--tray);font-weight:700;margin-bottom:10px}
.stack{display:flex;flex-direction:column;gap:12px}
label{display:flex;flex-direction:column;gap:5px;font-size:14px;font-weight:600;color:var(--ink)}
input,textarea,select{font:inherit;padding:10px 12px;border:1px solid var(--line);border-radius:9px;background:#fff;color:var(--ink)}
textarea{resize:vertical;font-family:ui-monospace,Menlo,monospace;font-size:12.5px}
input:focus,textarea:focus,select:focus{outline:none;border-color:var(--tray)}
.btn{display:inline-block;background:var(--tray);color:#fff;border:none;border-radius:999px;
  padding:11px 20px;font:inherit;font-weight:600;cursor:pointer;text-decoration:none;text-align:center}
.btn:hover{background:var(--tray-deep)}
.btn.small{padding:7px 14px;font-size:13px}
.btn.block{display:block;width:100%}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn.ghost:hover{background:var(--sand)}
.key-card textarea{width:100%;margin-bottom:10px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
@media(max-width:640px){.grid3{grid-template-columns:1fr}}
.os-card{text-align:center}
.os-name{font-weight:700;font-size:16px;margin-bottom:12px}
.soon{padding:10px 0}
.steps{padding-left:20px;color:var(--ink)}
.steps li{margin:6px 0}
.cols{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:760px){.cols{grid-template-columns:1fr}}
.alert{padding:12px 16px;border-radius:10px;margin:14px 0;font-size:14px}
.alert.ok{background:#e7f3ec;color:var(--ok);border:1px solid #bfe0cd}
.alert.err{background:#fbe9e4;color:var(--err);border:1px solid #f0c9bd}
code{background:var(--sand);padding:2px 7px;border-radius:6px;font-size:13px}
.dl-list{margin-top:14px;display:flex;flex-direction:column;gap:8px}
.dl-row{display:flex;align-items:center;gap:10px;font-size:14px;border-top:1px solid var(--line);padding-top:8px}
.dl-label{flex:1}
.pill{font-size:11px;padding:2px 9px;border-radius:999px;background:var(--sand);color:var(--soft);border:1px solid var(--line)}
.pill.ok{background:#e7f3ec;color:var(--ok);border-color:#bfe0cd}
.pill.off{background:#f2ece2;color:var(--faint)}
.linklike{background:none;border:none;color:var(--tray);cursor:pointer;font:inherit;padding:0;text-decoration:underline}
.linklike.danger{color:var(--err)}
.table-scroll{overflow-x:auto}
.tbl{width:100%;border-collapse:collapse;font-size:13.5px;min-width:640px}
.tbl th,.tbl td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--line);vertical-align:top}
.tbl th{color:var(--soft);font-weight:600}
.tbl tr.off{opacity:.5}
.tbl .acts{display:flex;gap:10px;white-space:nowrap}
.tbl .key span{font-family:ui-monospace,monospace}

/* ───────── RWD：手機/平板細修 ───────── */
@media(max-width:600px){
  .topbar{padding:12px 16px}
  .brand span{display:none}          /* 手機收起副標，品牌不擠 */
  .topnav a{margin-left:14px}
  .wrap{padding:24px 16px 48px}
  h1{font-size:21px}
  h2.sec{font-size:17px;margin-top:28px}
  .card{padding:18px}
  .dl-row{flex-wrap:wrap;row-gap:4px}          /* 後台下載列表小螢幕換行不擠 */
  .dl-label{flex:1 1 100%;order:3}
  .btn.block{padding:13px}                       /* 下載鈕觸控面積更好按 */
  .os-name{font-size:15px}
}
@media(max-width:400px){
  .wrap{padding:20px 13px 44px}
  .card.auth{margin:6vh auto}
}