@charset "UTF-8";
:root{--paper:#f5f6f3;--ink:#13212c;--muted:#616a70;--red:#d83043;--line:#d9dedb;--dark:#101c27;font-family:Inter,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none;scroll-behavior:smooth;scroll-padding-top:24px}
*{box-sizing:border-box}
body{margin:0}
a{color:inherit;text-decoration:none;text-underline-offset:4px;-webkit-tap-highlight-color:transparent}
a:focus-visible{outline:3px solid var(--red);outline-offset:5px}
img{display:block;max-width:100%;height:auto}
p,h1,h2,h3{margin:0}
p{line-height:1.85}
.container{width:min(1120px,calc(100% - 96px));margin-inline:auto}
.skip-link{position:fixed;top:-80px;left:20px;background:var(--ink);color:#fff;padding:14px;z-index:10}
.skip-link:focus{top:10px}
.site-header{border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:28px;min-height:96px}
.brand{display:flex;align-items:center;gap:12px;font-size:25px;font-weight:800;letter-spacing:1px;flex-shrink:0}
.brand img{border-radius:8px}
.brand small{display:block;font-size:12px;font-weight:500;letter-spacing:1px;color:var(--muted);margin-top:2px}
nav{display:flex;align-items:center;gap:28px;font-size:14px}
nav a{padding-block:12px;white-space:nowrap}
nav a:hover,.text-link:hover,.footer-main>a:last-child:hover{color:var(--red)}
nav [aria-current="page"]{color:var(--red);box-shadow:inset 0 -2px var(--red);font-weight:650}
.intro{max-width:780px;padding-block:66px 48px}
.eyebrow{color:#a43040;font-size:12px;font-weight:650;letter-spacing:1.4px}
h1{font-size:clamp(38px,4.7vw,56px);line-height:1.3;letter-spacing:-1.5px;font-weight:800;margin:18px 0 22px}
.intro-description{max-width:640px;font-size:17px;color:var(--muted)}
.intro-actions{display:flex;align-items:center;flex-wrap:wrap;gap:24px;margin-top:28px}
.button{display:inline-flex;align-items:center;justify-content:center;gap:18px;min-height:50px;padding:13px 21px;background:var(--red);color:#fff;font-size:15px;font-weight:650;transition:background .18s}
.button:hover{background:#b92436}
.text-link{font-size:14px;font-weight:600;text-decoration:underline}
.content-layout{display:grid;grid-template-columns:minmax(0,1fr) 304px;gap:64px;align-items:start;padding-bottom:68px}
.guide-content{min-width:0}
.guide-section{border-top:1px solid var(--line);padding-block:28px 34px}
.guide-section>.eyebrow{margin-bottom:12px}
h2{font-size:25px;line-height:1.45;letter-spacing:-.5px;font-weight:750}
h3{font-size:16px;line-height:1.65;font-weight:650}
.query-steps{list-style:none;counter-reset:steps;padding:0;margin:22px 0}
.query-steps li{position:relative;counter-increment:steps;padding-left:38px;margin-top:18px}
.query-steps li::before{content:"0" counter(steps);position:absolute;left:0;top:3px;font:12px/1.8 "Consolas",monospace;color:#a43040}
.query-steps strong{font-size:16px;line-height:1.7;font-weight:650}
.query-steps p{font-size:15px;color:var(--muted);margin-top:5px}
.query-steps a{text-decoration:underline;color:var(--ink)}
.example-id{white-space:nowrap;color:var(--ink)}
.usage-note{background:#e9eeea;border-left:3px solid var(--red);padding:18px 20px}
.usage-note p{font-size:14px;color:#4b5e54;margin-top:6px}
.rules-list{margin:22px 0 0}
.rules-list>div{display:grid;grid-template-columns:108px minmax(0,1fr);gap:18px;padding-block:14px;border-bottom:1px solid var(--line);line-height:1.85;font-size:15px}
.rules-list>div:first-child{padding-top:0}
.rules-list dt{font-weight:650}
.rules-list dd{margin:0;color:var(--muted)}
.section-note{font-size:13px;color:var(--muted);margin-top:15px}
.tool-list{display:grid;gap:22px;margin-block:23px}
.tool-list article{display:flex;align-items:flex-start;gap:16px}
.tool-list img{flex:0 0 52px;width:52px;border-radius:10px;margin-top:3px}
.tool-list p{font-size:15px;color:var(--muted);margin-top:5px}
.availability{padding-bottom:0}
.availability h2{font-size:19px;margin-bottom:13px}
.availability p{font-size:14px;color:var(--muted)}
.availability p+p{margin-top:12px}
.entry-card{position:sticky;top:24px;background:var(--dark);color:#fff;padding:25px 24px;border-top:3px solid var(--red)}
.entry-card>.eyebrow{color:#ef8790}
.entry-card h2{font-size:20px;margin-top:12px;letter-spacing:0}
.qr-frame{background:#fff;padding:12px;margin-block:22px 18px}
.qr-frame img{width:100%}
.entry-card>p:not(.eyebrow),.search-note p{font-size:13px;line-height:1.85;color:#c0cbd3}
.save-code{display:block;border:1px solid #697984;text-align:center;font-size:14px;font-weight:600;padding:10px;margin-top:16px}
.save-code:hover{background:#243746}
.search-note{border-top:1px solid #35434e;margin-top:22px;padding-top:18px}
.search-note strong{display:block;font-size:14px;margin-bottom:7px;font-weight:600}
.site-footer{border-top:1px solid var(--line);padding-block:24px 26px}
.footer-main{display:flex;align-items:center;justify-content:space-between;gap:24px}
.footer-main .brand{font-size:20px}
.footer-main>a:last-child{font-size:14px}
.footer-legal{display:flex;flex-wrap:wrap;gap:10px 24px;font-size:12px;color:var(--muted);margin-top:20px;line-height:1.7}
.footer-legal a:hover{text-decoration:underline}
@media(max-width:960px){.container{width:calc(100% - 48px)}.content-layout{gap:32px;grid-template-columns:minmax(0,1fr) 270px}.header-inner{gap:20px}nav{gap:20px}.brand small{font-size:11px}.entry-card{padding:23px 20px}.entry-card h2{font-size:19px}}
@media(max-width:720px){.header-inner{flex-wrap:wrap;gap:12px;padding-block:18px 0}.brand{font-size:23px}nav{width:100%;justify-content:space-between;gap:10px;font-size:13px}nav a{padding-block:12px}.intro{padding-block:40px 34px}h1{font-size:40px;margin-block:17px 18px}.intro-description{font-size:16px}.content-layout{grid-template-columns:minmax(0,1fr);gap:32px;padding-bottom:40px}.entry-card{position:static;display:grid;grid-template-columns:minmax(0,1fr) 180px;gap:0 24px;padding:26px}.entry-card>.eyebrow,.entry-card h2,.entry-card>p:not(.eyebrow),.entry-card .save-code,.search-note{grid-column:1}.qr-frame{grid-column:2;grid-row:1 / 6;align-self:start;margin:0;padding:9px}.entry-card h2{font-size:22px;margin-bottom:14px}.entry-card>p:not(.eyebrow),.search-note p{font-size:14px}.search-note{grid-column:1 / -1}.save-code{max-width:240px}.guide-section{padding-block:26px 30px}.availability{padding-bottom:0}}
@media(max-width:460px){.container{width:calc(100% - 40px)}.brand small{font-size:11px}.intro-actions{gap:20px}.button{width:100%;font-size:14px;gap:12px}h1{font-size:36px;letter-spacing:-1px}h2{font-size:23px}.rules-list>div{grid-template-columns:92px minmax(0,1fr);gap:12px;font-size:14px}.query-steps li{padding-left:32px}.usage-note{padding:16px}.entry-card{display:block;padding:25px}.entry-card h2{margin-bottom:0}.qr-frame{max-width:220px;margin:22px auto 18px;padding:11px}.save-code{max-width:none}.footer-main{gap:14px}.footer-main>a:last-child{font-size:12px}.footer-legal{display:block}.footer-legal a{display:block;margin-top:5px}}
@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}*{transition:none!important}}