:root{
  --ink:#14161a;
  --sub:#5f6673;
  --muted:#8a919e;
  --brand:#0066cc;
  --brand-dark:#004f9e;
  --brand-soft:#e8f1fb;
  --line:#e3e6ec;
  --line-soft:#eef0f4;
  --bg:#f4f5f7;
  --panel:#fff;
  --green:#1e8e3e;
  --green-soft:#eaf7ee;
  --amber:#9a5b00;
  --amber-soft:#fff7e6;
  --red:#b42318;
  --r-xl:24px;
  --r-lg:16px;
  --r-md:12px;
  --r-pill:999px;
  --shadow:0 18px 50px rgba(17,24,39,.08),0 2px 8px rgba(17,24,39,.04);
  --font:"Alibaba PuHuiTi 3.0","Alibaba PuHuiTi","Noto Sans SC",-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  --serif:"Alibaba PuHuiTi 3.0","Alibaba PuHuiTi","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:var(--font);
  color:var(--ink);
  background:
    radial-gradient(1100px 560px at 12% -8%,#e7f1ff 0,rgba(231,241,255,0) 58%),
    radial-gradient(900px 500px at 100% 0,#f2f6fb 0,rgba(242,246,251,0) 50%),
    var(--bg);
  -webkit-font-smoothing:antialiased;
  letter-spacing:.01em;
}
button,input,textarea{font:inherit;color:inherit}
button{cursor:pointer}
a{color:var(--brand)}
::selection{background:#cfe4fb}

/* ---------- top bar ---------- */
.topbar{
  height:64px;display:flex;align-items:center;gap:18px;
  padding:0 28px;position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.84);
  -webkit-backdrop-filter:blur(18px) saturate(160%);
  backdrop-filter:blur(18px) saturate(160%);
  border-bottom:1px solid rgba(20,22,26,.07);
}
.brand{display:flex;align-items:baseline;gap:10px;min-width:0}
.brand b{font-size:20px;font-weight:700;letter-spacing:.06em}
.brand b sup{font-size:9px;vertical-align:super;font-weight:600;letter-spacing:0}
.brand span{font-size:10.5px;color:var(--muted);letter-spacing:.14em;white-space:nowrap}
.topbar .tag{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 10px;
  border-radius:999px;background:#eef5ff;border:1px solid #d9e8fa;
  color:var(--brand-dark);font-size:11.5px;font-weight:600;white-space:nowrap;
}
.topbar .tag i{width:5px;height:5px;border-radius:50%;background:var(--brand)}
.topbar .right{margin-left:auto;display:flex;align-items:center;gap:10px;font-size:12px;color:var(--sub)}
.topbar .price{font-size:12.5px;font-weight:600;color:var(--ink)}
.topbar .price small{font-weight:400;color:var(--muted);margin-left:3px}
.topbar .help{height:32px;padding:0 13px;border-radius:999px;border:1px solid var(--line);background:#fff;font-size:12px;color:var(--sub)}

/* ---------- layout ---------- */
.app{
  width:100%;max-width:1280px;margin:0 auto;
  padding:22px 24px 40px;
  display:grid;grid-template-columns:minmax(0,840px) 300px;gap:22px;
  align-items:start;justify-content:center;
}
.app.generated{max-width:1500px;grid-template-columns:minmax(340px,410px) minmax(0,1fr)}
.app.generated .checklist{display:none}
.app.generated .preview-panel{display:flex}

/* ---------- chat ---------- */
.chat-panel{
  display:flex;flex-direction:column;min-width:0;
  height:calc(100dvh - 108px);min-height:580px;max-height:900px;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-xl);
  box-shadow:var(--shadow);overflow:hidden;
}
.chat-head{display:flex;align-items:center;gap:12px;padding:16px 20px 14px;border-bottom:1px solid var(--line-soft)}
.avatar{
  width:36px;height:36px;border-radius:50%;flex:none;
  display:grid;place-items:center;color:#fff;font-weight:700;font-size:15px;
  background:linear-gradient(135deg,#1a7ae0,#004f9e);
  box-shadow:0 6px 16px rgba(0,102,204,.24);
}
.chat-title{min-width:0}
.chat-title b{display:block;font-size:15px;font-weight:700;letter-spacing:.02em}
.chat-title span{display:block;font-size:11.5px;color:var(--muted);margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chat-status{
  margin-left:auto;display:inline-flex;align-items:center;gap:6px;flex:none;
  height:26px;padding:0 10px;border-radius:999px;font-size:11.5px;color:var(--green);
  background:var(--green-soft);border:1px solid #d5efdd;
}
.chat-status i{width:6px;height:6px;border-radius:50%;background:var(--green);box-shadow:0 0 0 3px rgba(30,142,62,.1)}
.chat-status.is-ready{color:var(--brand-dark);background:var(--brand-soft);border-color:#d5e7fb}
.chat-status.is-ready i{background:var(--brand)}

.progress{padding:12px 20px 11px;background:#fbfcfe;border-bottom:1px solid var(--line-soft)}
.progress-text{display:flex;justify-content:space-between;align-items:baseline;gap:12px;font-size:11.5px;color:var(--muted);margin-bottom:8px}
.progress-text b{font-size:12.5px;color:var(--ink);font-weight:600;white-space:nowrap}
.progress-text span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.progress-bar{height:6px;border-radius:999px;background:#e8edf4;overflow:hidden}
.progress-bar i{display:block;height:100%;width:0;border-radius:999px;background:linear-gradient(90deg,#3b95f0,#0066cc);transition:width .35s ease}

.chat-log{
  flex:1;min-height:0;overflow-y:auto;overscroll-behavior:contain;
  padding:20px 20px 8px;
  background:
    radial-gradient(600px 300px at 20% 0,#f7fbff 0,rgba(247,251,255,0) 65%),
    #fff;
  scroll-behavior:smooth;
}
.msg{display:flex;gap:10px;align-items:flex-start;margin-bottom:18px;animation:rise .22s ease both}
@keyframes rise{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:none}}
.msg .avatar{width:30px;height:30px;font-size:12.5px;box-shadow:none}
.msg .body{min-width:0;max-width:84%}
.bubble{
  padding:12px 15px;border-radius:4px 16px 16px 16px;
  background:#fff;border:1px solid var(--line);
  font-size:14.5px;line-height:1.72;white-space:pre-wrap;word-break:break-word;
  box-shadow:0 1px 2px rgba(17,24,39,.03);
}
.bubble b{font-weight:650}
.msg.user{justify-content:flex-end}
.msg.user .body{max-width:80%}
.msg.user .bubble{
  background:var(--brand);border-color:var(--brand);color:#fff;
  border-radius:16px 4px 16px 16px;box-shadow:0 8px 20px rgba(0,102,204,.17);
}
.msg .meta{font-size:10.5px;color:var(--muted);margin-top:5px;letter-spacing:.04em}
.msg.user .meta{text-align:right}
.typing{display:inline-flex;gap:4px;align-items:center;padding:14px 16px}
.typing i{width:5px;height:5px;border-radius:50%;background:#a9b4c3;animation:blink 1.15s infinite}
.typing i:nth-child(2){animation-delay:.16s}
.typing i:nth-child(3){animation-delay:.32s}
@keyframes blink{0%,80%,100%{opacity:.25;transform:translateY(0)}40%{opacity:1;transform:translateY(-2px)}}

/* ---------- cards inside chat ---------- */
.form-card{
  margin-top:10px;padding:13px 14px;border-radius:14px;
  background:#f7faff;border:1px solid #dfe8f4;
}
.why{display:flex;gap:6px;align-items:flex-start;font-size:11.5px;line-height:1.6;color:var(--sub);margin-bottom:10px}
.why b{color:var(--brand-dark);font-weight:650;flex:none}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  min-height:38px;padding:0 14px;border-radius:999px;
  border:1px solid #d7dee8;background:#fff;color:var(--ink);
  font-size:13.5px;line-height:1.2;display:inline-flex;align-items:center;gap:6px;
  transition:border-color .15s,background .15s,box-shadow .15s;
}
.chip:hover{border-color:#9ec5ec;background:#f6faff}
.chip:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.chip.selected{border-color:var(--brand);background:var(--brand-soft);color:var(--brand-dark);font-weight:600}
.chip.ghost{border-style:dashed;color:var(--sub)}
.chip.danger{color:var(--red);border-color:#f0d2ce;background:#fff8f7}
.card-actions{display:flex;justify-content:flex-end;align-items:center;gap:8px;margin-top:10px}
.mini-primary{
  height:34px;padding:0 15px;border-radius:999px;border:0;
  background:var(--brand);color:#fff;font-size:12.5px;font-weight:600;
  box-shadow:0 4px 12px rgba(0,102,204,.18);
}
.mini-primary:disabled{opacity:.4;box-shadow:none;cursor:not-allowed}
.mini-ghost{height:34px;padding:0 12px;border-radius:999px;border:1px solid var(--line);background:#fff;font-size:12px;color:var(--sub)}

/* summary */
.summary{margin-top:10px;border:1px solid #dbe7f5;border-radius:16px;background:#fff;overflow:hidden}
.summary-head{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:12px 14px;background:#f8fbff;border-bottom:1px solid #e6eef8}
.summary-head b{font-size:12.5px}
.summary-head span{font-size:10.5px;color:var(--muted)}
.summary-row{display:grid;grid-template-columns:76px minmax(0,1fr) auto;gap:8px;align-items:start;padding:9px 14px;border-bottom:1px solid var(--line-soft);font-size:12.5px;line-height:1.55}
.summary-row:last-child{border-bottom:0}
.summary-row .k{color:var(--muted)}
.summary-row .v{color:var(--ink);min-width:0;overflow-wrap:anywhere}
.summary-row .v i{font-style:normal;color:var(--muted);font-size:11px;margin-left:4px}
.summary-row button{border:0;background:none;color:var(--brand);font-size:11.5px;padding:0;white-space:nowrap}
.summary-actions{padding:12px 14px;display:flex;justify-content:space-between;align-items:center;gap:10px;background:#fbfdff}
.summary-actions .note{font-size:10.5px;color:var(--muted);line-height:1.5}
.summary-actions .mini-primary{height:38px;padding:0 16px;font-size:13px}

/* ---------- composer ---------- */
.composer{padding:12px 18px 13px;border-top:1px solid var(--line-soft);background:#fff}
.composer-box{
  display:flex;align-items:flex-end;gap:8px;
  border:1.5px solid #d8e0ea;border-radius:16px;padding:8px 8px 8px 14px;
  background:#fff;transition:border-color .15s,box-shadow .15s;
}
.composer-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 4px rgba(0,102,204,.1)}
.composer textarea{
  flex:1;min-height:28px;max-height:118px;border:0;outline:0;resize:none;
  padding:4px 0;background:transparent;font-size:14.5px;line-height:1.55;
}
.composer textarea::placeholder{color:#a3aab6}
.send{
  width:40px;height:40px;border-radius:12px;border:0;flex:none;
  background:var(--brand);color:#fff;display:grid;place-items:center;
  font-size:18px;line-height:1;transition:background .15s,transform .12s;
}
.send:hover{background:var(--brand-dark)}
.send:active{transform:scale(.96)}
.send:disabled{opacity:.35;cursor:not-allowed}
.composer-tools{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:8px;font-size:10.5px;color:var(--muted)}
.link-btn{border:0;background:none;color:var(--brand);font-size:11.5px;padding:0}
.link-btn:hover{text-decoration:underline}

/* ---------- checklist ---------- */
.checklist{
  position:sticky;top:86px;background:#fff;border:1px solid var(--line);
  border-radius:20px;padding:17px 17px 14px;box-shadow:0 8px 30px rgba(17,24,39,.04);
}
.checklist-head{display:flex;align-items:baseline;justify-content:space-between;gap:8px;margin-bottom:10px}
.checklist-head b{font-size:13.5px}
.checklist-head span{font-size:10.5px;color:var(--muted)}
.check-item{display:flex;gap:9px;align-items:flex-start;padding:8px 0;border-bottom:1px dashed var(--line-soft)}
.check-item:last-child{border-bottom:0}
.check-dot{
  width:18px;height:18px;border-radius:50%;border:1.5px solid #cfd7e2;flex:none;margin-top:1px;
  display:grid;place-items:center;font-size:10px;color:#fff;background:#fff;transition:.2s;
}
.check-item.done .check-dot{background:var(--green);border-color:var(--green)}
.check-item.active .check-dot{border-color:var(--brand);box-shadow:0 0 0 3px rgba(0,102,204,.12)}
.check-item b{display:block;font-size:12px;font-weight:550;line-height:1.4}
.check-item small{display:block;font-size:10.5px;color:var(--muted);line-height:1.45;margin-top:1px}
.checklist-note{margin-top:10px;padding-top:10px;border-top:1px solid var(--line-soft);font-size:10.5px;color:var(--muted);line-height:1.6}

/* ---------- preview ---------- */
.preview-panel{
  display:none;flex-direction:column;min-width:0;
  height:calc(100dvh - 108px);min-height:580px;max-height:920px;
  background:#fff;border:1px solid var(--line);border-radius:24px;
  box-shadow:var(--shadow);overflow:hidden;
}
.preview-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:13px 16px;border-bottom:1px solid var(--line-soft);background:#fff;z-index:2}
.preview-toolbar .title{display:flex;align-items:center;gap:8px;min-width:0}
.preview-toolbar b{font-size:13.5px;white-space:nowrap}
.draft-tag{display:inline-flex;align-items:center;height:22px;padding:0 8px;border-radius:999px;font-size:10.5px;color:var(--amber);background:var(--amber-soft);border:1px solid #f1ddb5;white-space:nowrap}
.toolbar-actions{display:flex;gap:7px;flex:none}
.toolbar-actions button{height:32px;padding:0 11px;border-radius:999px;border:1px solid var(--line);background:#fff;font-size:11.5px;color:var(--ink);white-space:nowrap}
.toolbar-actions button:hover{border-color:#b9c8da;background:#fafcff}
.toolbar-actions button b{color:var(--green);font-size:11px}
.preview-body{flex:1;min-height:0;overflow:auto;background:#e9edf2;padding:22px;display:flex;justify-content:center;align-items:flex-start}
.paper-wrap{width:100%;max-width:760px}
.letter{
  position:relative;background:#fff;padding:46px 108px 44px;
  box-shadow:0 22px 55px rgba(17,24,39,.14),0 2px 6px rgba(17,24,39,.06);
  font-family:var(--serif);font-size:17px;line-height:1.9;color:#101114;
}
.letter-head{display:flex;align-items:flex-start;justify-content:space-between;gap:22px;padding-bottom:14px}
.letter-address{font-family:var(--font);font-size:9.5px;line-height:1.62;color:#34363b;letter-spacing:.01em}
.letter-address p{margin:0}
.letter-logo{width:120px;height:auto;flex:none;margin-top:2px}
.letter-logo-mask{
  width:126px;min-height:58px;flex:none;margin-top:2px;
  border:1.2px dashed rgba(160,120,40,.45);border-radius:6px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
  color:#9a7b45;background:#fffdf8;
}
.letter-logo-mask span{font-size:10px;font-weight:700;letter-spacing:.08em}
.letter-logo-mask small{font-size:8px;color:#b09a76}
.letter-title{
  margin:24px 0 26px;text-align:center;font-family:var(--serif);
  font-size:32px;font-weight:700;letter-spacing:.42em;text-indent:.42em;
}
.letter-to{font-size:17px;font-weight:600;text-indent:0;margin:0 0 2px}
.letter p{margin:0 0 .52em;text-align:justify;text-indent:2em}
.letter p.no-indent{text-indent:0}
.letter .demand{text-indent:0;padding-left:2em;position:relative;margin-bottom:.42em}
.letter .demand b{position:absolute;left:0;top:0;font-weight:400}
.letter-sign{margin:24px 0 0;text-align:right;text-indent:0;line-height:1.95;font-size:16px}
.letter-sign p{margin:0;text-indent:0;text-align:right}
.letter-section{font-size:16px;font-weight:700;letter-spacing:.02em;margin:1.05em 0 .35em;text-indent:0}
.letter-credentials{display:flex;justify-content:flex-end;align-items:flex-end;gap:22px;margin:12px 0 0}
.credential-sign{min-width:150px;text-align:center;border-bottom:1px solid #b9bcc2;padding:12px 8px 4px}
.credential-sign span{font-family:var(--font);font-size:10px;color:#6b7280;letter-spacing:.08em}
.credential-sign small{display:block;font-family:var(--font);font-size:8.5px;color:#9aa1ab;margin-top:2px}
.credential-seal{
  width:88px;height:88px;flex:none;border:2px dashed rgba(180,35,24,.42);border-radius:50%;
  display:grid;place-items:center;text-align:center;color:rgba(180,35,24,.7);
  font-family:var(--font);font-size:10px;letter-spacing:.06em;transform:rotate(-8deg);
}
.letter-contact{margin-top:24px;font-size:14px;line-height:1.95;text-indent:0}
.letter-declare{
  margin-top:26px;padding-top:10px;border-top:.5px solid #b9bcc2;
  font-size:12px;line-height:1.78;color:#303238;
}
.letter-declare p{text-indent:0;margin:0 0 .28em;text-align:justify}
.letter-declare b{font-weight:700}
.letter-watermark{
  position:absolute;inset:0;overflow:hidden;pointer-events:none;z-index:2;
  display:flex;align-items:center;justify-content:center;
}
.letter-watermark span{
  transform:rotate(-27deg);white-space:nowrap;font-family:var(--font);
  font-size:34px;font-weight:700;letter-spacing:.16em;color:rgba(20,40,80,.055);
}
.preview-foot{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:13px 16px;border-top:1px solid var(--line-soft);background:#fff}
.preview-note{font-size:10.5px;line-height:1.55;color:var(--muted);max-width:52%}
.preview-actions{display:flex;gap:8px;flex:none}
.btn{height:40px;padding:0 17px;border-radius:999px;border:1px solid transparent;font-size:13px;font-weight:600;white-space:nowrap}
.btn.primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(0,102,204,.22)}
.btn.primary:hover{background:var(--brand-dark)}
.btn.secondary{background:#fff;border-color:var(--line);color:var(--ink)}
.btn.secondary:hover{border-color:#b9c8da}

/* ---------- clause drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(10,16,28,.32);z-index:80;
  opacity:0;pointer-events:none;transition:opacity .2s;
}
.drawer-mask.open{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(430px,94vw);z-index:81;
  background:#fff;box-shadow:-24px 0 60px rgba(0,0,0,.16);
  transform:translateX(102%);transition:transform .24s cubic-bezier(.2,.8,.2,1);
  display:flex;flex-direction:column;
}
.drawer.open{transform:none}
.drawer-head{display:flex;align-items:flex-start;gap:12px;padding:20px 20px 14px;border-bottom:1px solid var(--line-soft)}
.drawer-head h3{margin:0;font-size:15px}
.drawer-head p{margin:3px 0 0;font-size:11px;color:var(--muted)}
.drawer-head button{margin-left:auto;width:30px;height:30px;border-radius:50%;border:1px solid var(--line);background:#fff;font-size:15px;line-height:1;color:var(--sub)}
.drawer-body{flex:1;overflow:auto;padding:6px 20px 18px}
.clause{display:flex;gap:10px;padding:12px 0;border-bottom:1px solid var(--line-soft)}
.clause:last-child{border-bottom:0}
.clause-ico{width:21px;height:21px;border-radius:50%;flex:none;margin-top:1px;display:grid;place-items:center;font-size:10.5px;font-weight:700}
.clause-ico.ok{background:var(--green-soft);color:var(--green)}
.clause-ico.warn{background:var(--amber-soft);color:var(--amber)}
.clause-ico.opt{background:#f1f3f6;color:var(--muted)}
.clause b{display:block;font-size:12.5px;line-height:1.5}
.clause small{display:block;font-size:10.5px;line-height:1.55;color:var(--muted);margin-top:2px}
.clause .tagline{display:inline-flex;margin-top:5px;font-size:9.5px;padding:2px 6px;border-radius:4px;background:#f5f7fa;color:var(--sub)}
.drawer-foot{padding:12px 20px 16px;border-top:1px solid var(--line-soft);font-size:10.5px;color:var(--muted);line-height:1.6;background:#fbfcfe}

/* ---------- toast ---------- */
.toast{
  position:fixed;left:50%;bottom:26px;z-index:100;
  transform:translate(-50%,16px);opacity:0;pointer-events:none;
  background:#14161a;color:#fff;font-size:12.5px;line-height:1.4;
  padding:11px 18px;border-radius:999px;box-shadow:0 14px 34px rgba(0,0,0,.24);
  transition:opacity .18s,transform .18s;max-width:86vw;text-align:center;
}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------- responsive ---------- */
@media(max-width:1180px){
  .app{grid-template-columns:minmax(0,1fr);max-width:820px}
  .checklist{position:static;order:-1;display:grid;grid-template-columns:1fr 1fr;gap:0 18px;padding:14px 16px}
  .checklist-head{grid-column:1 / -1;margin-bottom:2px}
  .check-item{padding:6px 0}
  .checklist-note{grid-column:1 / -1;margin-top:6px;padding-top:7px}
  .app.generated{grid-template-columns:minmax(0,1fr);max-width:1100px}
  .app.generated .chat-panel{display:none}
}
@media(max-width:720px){
  .topbar{height:56px;padding:0 16px;gap:10px}
  .brand b{font-size:18px}
  .brand span{display:none}
  .topbar .tag{display:none}
  .topbar .right .price{display:none}
  .topbar .query-link{display:none}
  .app{padding:12px 10px 24px;gap:12px}
  .checklist{display:none}
  .chat-panel{height:calc(100dvh - 80px);min-height:520px;border-radius:18px}
  .chat-head{padding:13px 14px 11px}
  .progress{padding:10px 14px 9px}
  .chat-log{padding:14px 12px 6px}
  .msg .body{max-width:90%}
  .msg.user .body{max-width:86%}
  .bubble{font-size:14px;padding:11px 13px}
  .composer{padding:10px 12px 12px}
  .summary-row{grid-template-columns:64px minmax(0,1fr) auto;font-size:12px}
  .preview-panel{height:calc(100dvh - 68px);min-height:520px;border-radius:18px}
  .preview-toolbar{padding:10px 12px;flex-wrap:wrap}
  .preview-toolbar b{font-size:12.5px}
  .toolbar-actions button{height:30px;font-size:11px;padding:0 9px}
  .preview-body{padding:10px}
  .letter{padding:30px 24px 28px;font-size:13.5px;line-height:1.85}
  .letter-logo{width:88px}
  .letter-logo-mask{width:92px;min-height:44px}
  .letter-address{font-size:7px}
  .letter-title{font-size:24px;margin:18px 0 20px}
  .letter-to{font-size:14px}
  .letter-sign{font-size:13px}
  .letter-section{font-size:14px}
  .letter-credentials{gap:12px;margin-top:8px}
  .credential-sign{min-width:110px}
  .credential-seal{width:70px;height:70px;font-size:8.5px}
  .letter-declare{font-size:10px}
  .preview-foot{padding:10px 12px;flex-wrap:wrap}
  .preview-note{display:none}
  .preview-actions{width:100%;justify-content:space-between}
  .btn{height:38px;font-size:12.5px}
}
@media(prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
}

/* ---------- print: only the letter ---------- */
@media print{
  @page{size:A4;margin:0}
  body{background:#fff}
  .topbar,.chat-panel,.checklist,.preview-toolbar,.preview-foot,.drawer,.drawer-mask,.toast{display:none!important}
  .app,.app.generated{display:block;max-width:none;padding:0}
  .preview-panel{display:block!important;border:0;box-shadow:none;height:auto;max-height:none;border-radius:0}
  .preview-body{display:block;padding:0;background:#fff;overflow:visible}
  .paper-wrap{max-width:none}
  .letter{
    width:210mm;min-height:297mm;padding:25.4mm 31.7mm;
    box-shadow:none;font-size:14pt;line-height:1.5;
  }
  .letter-title{font-size:26pt}
  .letter-head{padding-bottom:10mm}
  .letter-logo{width:55mm}
  .letter-logo-mask{width:48mm;min-height:18mm}
  .letter-address{font-size:9pt}
  .letter-sign{font-size:14pt}
  .letter-section{font-size:16pt}
  .credential-sign{min-width:40mm}
  .credential-seal{width:26mm;height:26mm;font-size:10pt}
  .letter-contact{font-size:12pt}
  .letter-declare{font-size:11pt}
  .letter-watermark span{font-size:48pt}
}




.form-card button:disabled{opacity:.55;cursor:not-allowed}