:root{--bg:#0b1220;--panel:#141d2f;--line:#26324a;--text:#e8edf7;--muted:#9aa8c2;--accent:#4f8cff;--ok:#31c48d;--warn:#f6a94a;--err:#f26d6d}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;overflow-x:hidden}
body{margin:0;background:var(--bg);color:var(--text);font:15px/1.6 system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;overflow-x:hidden}
a{color:var(--accent);text-decoration:none}
.top{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:14px 20px;border-bottom:1px solid var(--line);position:sticky;top:0;background:rgba(11,18,32,.92);backdrop-filter:blur(8px);z-index:5;padding-left:max(20px,env(safe-area-inset-left));padding-right:max(20px,env(safe-area-inset-right))}
.brand{font-weight:700;color:var(--text)}
.brand span{color:var(--muted);font-weight:400;margin-left:6px}
.top nav{display:flex;gap:14px;align-items:center}
main{max-width:1040px;margin:0 auto;padding:28px 20px 56px;padding-left:max(20px,env(safe-area-inset-left));padding-right:max(20px,env(safe-area-inset-right))}
footer{text-align:center;color:var(--muted);font-size:13px;padding:24px;border-top:1px solid var(--line)}
h1{font-size:clamp(24px,4vw,34px);line-height:1.25;margin:8px 0 12px}
h2{font-size:19px;margin:0 0 10px}
h3{margin:0 0 8px}
.eyebrow{color:var(--accent);letter-spacing:.14em;font-size:12px;text-transform:uppercase;margin:0}
.lead{color:var(--muted);max-width:62ch}
.muted{color:var(--muted)}
.small{font-size:13px}
.hero{padding:28px 0 8px}
.cta{display:flex;gap:12px;flex-wrap:wrap;margin:18px 0}
.steps{list-style:none;padding:0;display:flex;gap:18px;flex-wrap:wrap;color:var(--muted)}
.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));margin-top:28px}
.card,.panel{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:20px}
.note{margin-top:24px;color:var(--muted);font-size:13px}
.primary,.ghost,.link{font:inherit;border-radius:10px;padding:10px 16px;cursor:pointer;border:1px solid transparent}
.primary{background:var(--accent);color:#fff}
.ghost{background:transparent;color:var(--text);border-color:var(--line)}
.link{background:none;border:none;color:var(--accent);padding:0}
.stack{display:flex;flex-direction:column;gap:12px}
label{display:flex;flex-direction:column;gap:6px;font-size:14px;color:var(--muted)}
input,textarea,select{font:inherit;font-size:16px;color:var(--text);background:#0e1626;border:1px solid var(--line);border-radius:9px;padding:12px;width:100%}
textarea{min-height:88px;resize:vertical}
.primary,.ghost{min-height:46px}
.hint{color:var(--muted);font-size:12px}
.check{flex-direction:row;align-items:center;gap:8px;color:var(--text)}
.check input{width:auto}
.row{display:flex;gap:12px;align-items:flex-end;flex-wrap:wrap}
.error,.lead-error{color:var(--err)}
.lead-ok,.notice.ok{color:var(--ok)}
.notice{background:#0e1626;border:1px dashed var(--line);border-radius:10px;padding:12px 14px}
/* 作者样式里的 display 会盖过 UA 的 [hidden]，这里显式兜底 */
[hidden]{display:none !important}
/* 聊天 + 常驻表单 */
.chat-layout{display:grid;grid-template-columns:1.3fr .9fr;gap:20px;align-items:start}
.chat-layout.form-only{grid-template-columns:minmax(0,560px);justify-content:center}
.chat-layout.chat-only{grid-template-columns:minmax(0,760px);justify-content:center}
.chat-app{display:flex;flex-direction:column;height:calc(100dvh - 220px);min-height:380px;background:var(--panel);border:1px solid var(--line);border-radius:14px;overflow:hidden}
.chat-app-head{padding:12px 16px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:12px}
.chat-title{display:flex;flex-direction:column;line-height:1.3;min-width:0}
.chat-sub{color:var(--muted);font-size:12px}
.chat-log{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:12px;scroll-behavior:smooth}
.msg{margin:0;max-width:84%;padding:10px 14px;border-radius:14px;background:#0e1626;border:1px solid var(--line);white-space:pre-wrap;word-break:break-word;animation:msg-in .18s ease-out}
.msg-assistant{align-self:flex-start}
.msg-user{align-self:flex-end;background:#1d3a6b;border-color:#2b4a7d}
.msg-system{align-self:stretch;max-width:100%;background:transparent;border:1px dashed #6b4a2a;color:var(--warn);font-size:13px}
.link-btn{display:inline-block;margin-top:8px;background:transparent;border:1px solid #6b4a2a;color:var(--warn);border-radius:8px;padding:6px 12px;font-size:13px;cursor:pointer}
.link-btn:hover{background:#1c1410}
.msg-role{display:block;font-size:12px;color:var(--muted);margin-bottom:4px}
@keyframes msg-in{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}
.dots{display:inline-flex;gap:4px;align-items:center;height:18px}
.dots i{width:6px;height:6px;border-radius:50%;background:var(--muted);animation:blink 1.2s infinite}
.dots i:nth-child(2){animation-delay:.2s}
.dots i:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,60%,100%{opacity:.25}30%{opacity:1}}
.composer{display:flex;gap:10px;align-items:flex-end;padding:12px 16px;padding-bottom:calc(12px + env(safe-area-inset-bottom));border-top:1px solid var(--line)}
.composer textarea{flex:1;min-height:46px;max-height:140px;resize:none;border-radius:12px;padding:12px 14px}
.composer .send{flex:none;min-width:72px}
.lead-form-panel{position:sticky;top:80px}
.lead-form-panel h2{margin-bottom:4px}
.lead-form button[type=submit]{width:100%}
.chat-log.readonly{height:auto;overflow:visible}
.leads{width:100%;border-collapse:collapse}
.leads th,.leads td{text-align:left;padding:10px 8px;border-bottom:1px solid var(--line)}
.leads th{color:var(--muted);font-size:13px;font-weight:500}
.tabs{display:flex;gap:10px;margin:18px 0;flex-wrap:wrap}
.tag{padding:3px 9px;border-radius:999px;font-size:12px;border:1px solid var(--line)}
.tag-new{color:var(--warn);border-color:#5a4425}
.tag-contacted{color:var(--accent);border-color:#2b4a7d}
.tag-closed{color:var(--muted)}
.detail-btn{display:inline-block;padding:5px 12px;font-size:13px;border-radius:8px;text-decoration:none;white-space:nowrap}
.admin-head{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;flex-wrap:wrap}
.facts{display:grid;grid-template-columns:120px 1fr;gap:8px 16px;margin:14px 0}
.facts dt{color:var(--muted);font-size:14px}
.facts dd{margin:0;word-break:break-word}
.back{display:inline-block;margin-bottom:14px;color:var(--muted)}
.login-panel{max-width:380px;margin:6vh auto}
@media (max-width:860px){.facts{grid-template-columns:96px 1fr}.chat-layout{grid-template-columns:1fr}.chat-app{height:60dvh;min-height:340px}.lead-form-panel{position:static}}
@media (max-width:600px){
  main{padding:20px 14px 48px;padding-left:max(14px,env(safe-area-inset-left));padding-right:max(14px,env(safe-area-inset-right))}
  .top{padding:12px max(14px,env(safe-area-inset-right)) 12px max(14px,env(safe-area-inset-left))}
  h1{font-size:22px}
  .cta{flex-direction:column;align-items:stretch}
  .cta a{text-align:center}
  .chat-app{height:58dvh;min-height:320px;border-radius:12px}
  .chat-app-head{padding:10px 12px}
  .chat-log{padding:12px 10px}
  .msg{max-width:90%}
  .composer{padding:10px;padding-bottom:calc(10px + env(safe-area-inset-bottom))}
  .composer .send{min-width:64px}
  .row{flex-direction:column;align-items:stretch}
  .row button,.row .ghost{width:100%}
  .leads thead{display:none}
  .leads tr{display:block;border-bottom:1px solid var(--line);padding:10px 0}
  .leads td{display:flex;justify-content:space-between;gap:12px;border:none;padding:4px 0}
  .leads td:first-child::before{content:"#";color:var(--muted)}
  .facts{grid-template-columns:1fr;gap:2px 0}
  .facts dt{margin-top:8px}
}
@media (max-width:420px){.top{flex-wrap:wrap}.steps{flex-direction:column;gap:6px}.brand span{display:none}}