:root{--paper:#f4efe4;--surface:#fffdf7;--ink:#211d19;--muted:#74695c;--line:#d8cdbb;--red:#9f3329;--red2:#74251f}
*{box-sizing:border-box}
html,body{margin:0;background:var(--paper);color:var(--ink);font-family:"Noto Serif SC","Songti SC","STSong","SimSun",serif}
header{height:64px;padding:8px 14px;display:flex;align-items:center;gap:10px;border-bottom:1px solid var(--line);background:rgba(255,253,247,.94)}
.seal{width:42px;height:42px;display:grid;place-items:center;border-radius:6px 11px;background:var(--red);color:white;font-weight:700}
header strong,header small{display:block}header strong{font-size:17px}.center-title{font-size:21px}.version{font-size:15px}header small{margin-top:2px;color:var(--muted);font-size:11px}
main{padding:8px 4px 20px}
.intro{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(280px,.65fr);gap:28px;align-items:center;margin:0 2px 10px;padding:24px;border:1px solid var(--line);border-radius:14px;background:rgba(255,253,247,.78)}
.eyebrow{margin:0 0 9px!important;color:var(--red)!important;font-size:13px!important;font-weight:700;letter-spacing:.1em}
.intro h2{margin:0;font-size:clamp(21px,calc(4vw - 7px),41px);line-height:1.12;letter-spacing:-.03em}
.intro-copy>p:last-child{margin:12px 0 0;color:var(--muted);font-size:14px;line-height:1.8}
.route-card{position:relative;overflow:hidden;padding:16px 18px;border:1px solid var(--line);border-radius:14px;background:var(--surface)}
.route-card:after{content:"乾";position:absolute;right:-5px;bottom:-25px;color:rgba(159,51,41,.06);font-size:92px;font-weight:700}
.route-card>strong{color:var(--red);font-size:13px}
.route-card ol{position:relative;z-index:1;margin:12px 0 0;padding:0;list-style:none;display:grid;gap:9px}
.route-card li{font-size:14px}
.route-card li span{margin-right:10px;color:#b18a45;font:12px ui-monospace,monospace}
nav{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;margin:0 2px 8px}
nav button{min-width:0;padding:9px 6px;border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--ink);font-family:inherit}
nav b,nav span{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}nav b{font-size:14px}nav span{margin-top:3px;color:var(--muted);font-size:10px}
nav button.active{border-color:var(--red2);background:linear-gradient(135deg,var(--red),var(--red2));color:#fff}nav button.active span{color:#f5dfd1}
.workbench{overflow:hidden;border:1px solid var(--line);border-radius:10px;background:var(--surface)}
.bar{height:40px;padding:5px 8px;display:flex;align-items:center;justify-content:space-between;gap:8px;border-bottom:1px solid var(--line)}
h1{min-width:0;margin:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:15px}
.bar a{flex:0 0 auto;padding:5px 7px;border:1px solid #e1b9b4;border-radius:7px;color:var(--red);font-size:12px;text-decoration:none}
iframe{display:block;width:100%;height:calc(100vh - 126px);min-height:760px;border:0;background:#fff}
.notice{margin:9px 7px 0;color:var(--muted);font-size:11px;line-height:1.6}
@media(max-width:640px){header{height:56px}.seal{width:38px;height:38px}header small{display:none}main{padding-top:6px}.intro{grid-template-columns:1fr;gap:10px;padding:13px 12px}.intro h2{font-size:18px}.intro-copy>p:last-child{margin-top:8px;font-size:12px;line-height:1.55}.route-card{padding:10px 12px}.route-card ol{gap:5px;margin-top:7px}.route-card li{font-size:12px}nav{grid-template-columns:repeat(2,1fr)}nav button{padding:7px 5px}nav button[data-model="field"]{grid-column:1/-1}.bar{height:36px}h1{font-size:13px}.bar a{font-size:11px}iframe{height:calc(100vh - 158px);min-height:720px}}