/* ZHENG API official site — design B: green brand bands, light reading area */
@font-face{font-family:'Sentient';font-weight:400;font-display:swap;src:url(/site-assets/fonts/sentient-400.woff2) format('woff2')}
@font-face{font-family:'Sentient';font-weight:500;font-display:swap;src:url(/site-assets/fonts/sentient-500.woff2) format('woff2')}
:root{
  --green:#133621;--green-2:#1d4a2c;--green-3:#2b5a3a;--gold:#f4d96c;--gold-2:#fbe58a;
  --cream:#f3ecd2;--cream-soft:#c9c2a4;
  --bg:#f4f6f3;--alt:#e9eee8;--card:#fff;--ink:#14281b;--soft:#4d5e52;--line:#d7ddd6;
  --sans:'PingFang SC','Microsoft YaHei','Noto Sans CJK SC',system-ui,sans-serif;
  --serif:'Sentient','ZS Serif','Songti SC','Noto Serif CJK SC',serif;
  --w:1200px;--r:6px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.7 var(--sans);-webkit-font-smoothing:antialiased}
a{color:inherit;text-underline-offset:.2em}
h1,h2,h3,h4,p{margin:0}
img{max-width:100%;display:block}
code{font-family:Consolas,'Courier New',monospace;font-size:.92em;background:var(--alt);padding:.1em .35em;border-radius:3px}
pre{background:var(--green);color:var(--cream);padding:18px 20px;border-radius:var(--r);overflow:auto;font:14px/1.6 Consolas,'Courier New',monospace;margin:0}
pre code{background:none;padding:0;color:inherit}
.serif{font-family:var(--serif);font-weight:500;letter-spacing:-.01em}
.wrap{max-width:var(--w);margin:0 auto;padding:0 32px}
.skip{position:absolute;left:-999px}.skip:focus{left:16px;top:8px;z-index:20;background:var(--gold);color:var(--green);padding:8px 12px}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px}
main :focus-visible{outline-color:var(--green)}

.hero .wrap>*,.grid3>*,.grid2>*,.docs>*,.calc-wrap>*,.prose,.panel{min-width:0}
.panel{overflow-x:auto}
.bar{overflow-wrap:anywhere}
/* top bar + nav */
.bar{background:var(--green);color:var(--gold);font-size:14px;text-align:center;padding:8px 16px;border-bottom:1px solid var(--green-3)}
.bar a{font-weight:600}
nav.top{position:sticky;top:0;z-index:10;background:var(--green);color:var(--cream)}
nav.top .wrap{display:flex;align-items:center;gap:30px;height:64px}
.logo{font-size:22px;color:var(--gold);text-decoration:none}
.links{display:flex;gap:24px;font-size:15px;flex:1}
.links a,.right .txt{text-decoration:none;opacity:.88;padding:6px 0}
.links a:hover,.right .txt:hover,.links a[aria-current]{opacity:1;text-decoration:underline;text-underline-offset:8px;text-decoration-color:var(--gold)}
.right{display:flex;align-items:center;gap:18px;font-size:15px}
.menu{display:none;margin-left:auto}
.menu summary{list-style:none;cursor:pointer;border:1px solid var(--green-3);padding:6px 14px;border-radius:4px}
.menu summary::-webkit-details-marker{display:none}
.menu-list{position:absolute;right:16px;top:60px;background:var(--green-2);border-radius:var(--r);padding:10px 0;min-width:200px;display:flex;flex-direction:column}
.menu-list a{padding:10px 18px;text-decoration:none}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;height:44px;padding:0 20px;border-radius:4px;background:var(--gold);color:var(--green);font-weight:600;font-size:15px;text-decoration:none;border:0;cursor:pointer;font-family:inherit;transition:background .2s,transform .2s}
.btn:hover{background:var(--gold-2);transform:translateY(-1px)}
.btn.sm{height:38px;padding:0 16px;font-size:14px}
.btn.dark{background:var(--green);color:var(--gold)}
.btn.dark:hover{background:var(--green-2)}
.btn.ghost{background:transparent;color:var(--green);border:1px solid var(--green)}
.more{font-weight:600;text-decoration:none}
.more:hover{text-decoration:underline}
.linkbtn{background:none;border:0;padding:0;color:inherit;font:inherit;cursor:pointer;text-align:left}
.linkbtn:hover{text-decoration:underline}

/* hero (home) and page head (inner pages) */
.hero{background:var(--green);color:var(--cream);padding:72px 0 88px}
.hero .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero h1{font-size:52px;line-height:1.15;color:var(--gold)}
.hero .sub{font-size:19px;margin:20px 0 32px;max-width:30em;color:var(--cream-soft)}
.cta{display:flex;gap:24px;align-items:center;flex-wrap:wrap}
.hero .more{color:var(--cream)}
.facts{display:flex;gap:36px;margin-top:40px;font-size:14px;color:var(--cream-soft);flex-wrap:wrap}
.facts b{display:block;font-size:24px;color:var(--cream);font-weight:500}
.phead{background:var(--green);color:var(--cream);padding:44px 0 48px}
.crumb{font-size:14px;color:var(--cream-soft);margin-bottom:10px}
.crumb a{text-decoration:none}.crumb a:hover{text-decoration:underline}
.phead h1{font-size:40px;line-height:1.2;color:var(--gold)}
.phead .lede{font-size:18px;color:var(--cream-soft);margin-top:12px;max-width:42em}

/* price panel */
.panel{background:var(--card);color:var(--ink);border-radius:8px;padding:24px 26px}
.panel .ph{display:flex;justify-content:space-between;align-items:baseline;gap:12px;margin-bottom:10px}
.panel .ph span{font-size:13px;color:var(--soft)}
.promo-note{margin-top:14px;font-size:14px;background:var(--green);color:var(--gold);padding:10px 12px;border-radius:4px}

/* tables */
table.t{width:100%;border-collapse:collapse;font-variant-numeric:tabular-nums}
table.t th{font-weight:400;font-size:13px;color:var(--soft);text-align:right;padding:8px 10px;border-bottom:1px solid var(--line)}
table.t td{text-align:right;padding:12px 10px;border-top:1px solid var(--line);vertical-align:top}
table.t th:first-child,table.t td:first-child{text-align:left;padding-left:0}
table.t th:last-child,table.t td:last-child{padding-right:0}
table.t td small{display:block;font-size:13px;color:var(--soft);font-weight:400}
table.t tr:first-child td{border-top:0}
.tbox{background:var(--card);border-radius:8px;padding:8px 24px 16px;overflow-x:auto}
table.t.left td,table.t.left th{text-align:left}

/* sections */
section.blk{padding:72px 0}
section.alt{background:var(--alt)}
.sh{display:flex;justify-content:space-between;align-items:baseline;gap:16px;margin-bottom:28px}
.sh h2{font-size:32px;color:var(--green)}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.card{background:var(--card);border-radius:8px;padding:26px;display:block;text-decoration:none}
a.card:hover{outline:2px solid var(--green)}
.card .n{font-size:14px;color:var(--soft)}
.card h3{font-size:20px;margin:6px 0 8px;color:var(--green)}
.card p{color:var(--soft);font-size:15px}
.card .tag{display:inline-block;font-size:13px;background:var(--gold);color:var(--green);padding:1px 8px;border-radius:3px;margin-left:6px;vertical-align:middle}

/* news list */
.nl{list-style:none;margin:0;padding:0}
.nl li{display:grid;grid-template-columns:120px 1fr 80px;gap:24px;padding:16px 0;border-top:1px solid var(--line)}
.nl time{color:var(--soft);font-variant-numeric:tabular-nums}
.nl .k{color:var(--soft);text-align:right;font-size:14px}
.nl a{text-decoration:none}.nl a:hover{text-decoration:underline}
.month{margin-top:36px}
.month h2{font-size:22px;color:var(--green);position:sticky;top:64px;background:var(--bg);padding:10px 0;z-index:2}
.entry{background:var(--card);border-radius:8px;margin-top:12px}
.entry summary{list-style:none;cursor:pointer;display:grid;grid-template-columns:1fr 70px 90px;gap:16px;padding:16px 22px;align-items:baseline}
.entry summary::-webkit-details-marker{display:none}
.entry summary .t{font-weight:600}
.entry summary .k{color:var(--soft);font-size:14px}
.entry summary time{color:var(--soft);text-align:right;font-variant-numeric:tabular-nums}
.entry[open] summary{border-bottom:1px solid var(--line)}
.entry .body{padding:18px 22px 22px;max-width:760px}

/* docs (start / help) */
.docs{display:grid;grid-template-columns:220px 1fr;gap:48px;padding-top:48px;padding-bottom:80px}
.side{position:sticky;top:88px;align-self:start;display:flex;flex-direction:column;gap:2px;font-size:15px}
.side a{text-decoration:none;padding:8px 12px;border-radius:4px;color:var(--soft)}
.side a:hover{background:var(--alt);color:var(--ink)}
.side a[aria-current]{background:var(--green);color:var(--gold)}
.prose{max-width:760px}
.prose h2{font-size:26px;color:var(--green);margin:40px 0 14px}
.prose h2:first-child{margin-top:0}
.prose h3{font-size:19px;margin:26px 0 8px}
.prose h4{font-size:17px;margin:18px 0 6px}
.prose p,.prose ul,.prose ol{margin:0 0 14px}
.prose li{margin-bottom:6px}
.prose pre{margin:0 0 18px}
.note{background:var(--alt);border-left:4px solid var(--green);padding:14px 18px;border-radius:0 var(--r) var(--r) 0;margin:0 0 18px}
.warn{background:#fbf3d0;border-left:4px solid #b8932a;padding:14px 18px;border-radius:0 var(--r) var(--r) 0;margin:0 0 18px}
.copybox{position:relative}
.copybox .btn{position:absolute;top:10px;right:10px}
.copybox pre{max-height:420px;padding-top:56px}
.guide figure{margin:8px 0 12px;background:var(--card);border-radius:8px;padding:10px;border:1px solid var(--line)}
.guide figure img{width:100%;height:auto;border-radius:4px}
.guide .toc{background:var(--card);border-radius:8px;padding:14px 18px;line-height:2}

/* faq */
.faq details{background:var(--card);border-radius:8px;margin-bottom:10px}
.faq summary{cursor:pointer;padding:16px 22px;font-weight:600;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:'+';float:right;color:var(--soft)}
.faq details[open] summary::after{content:'−'}
.faq details>div{padding:0 22px 18px;color:var(--soft)}

/* calculator */
.calc{background:var(--green);color:var(--cream);border-radius:8px;padding:26px;display:grid;gap:14px}
.calc label{display:grid;grid-template-columns:4em minmax(0,1fr);align-items:center;gap:12px}
.calc select{font:inherit;color:var(--cream);background:var(--green-2);border:1px solid var(--green-3);border-radius:4px;padding:8px 10px;min-height:44px;width:100%;min-width:0}
.calc .out{font-size:22px;color:var(--gold)}
.calc .out small{display:block;font-size:15px;color:var(--cream-soft)}
.calc-wrap{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}

/* downloads */
.dl{display:grid;grid-template-columns:1fr auto;gap:8px 24px;align-items:center}
.dl .meta{font-size:13px;color:var(--soft);word-break:break-all}

/* contact strip + footer */
.strip{background:var(--green);color:var(--cream);padding:48px 0}
.strip .wrap{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.strip h2{font-size:28px;color:var(--gold)}
.strip p{color:var(--cream-soft);margin-top:6px}
.foot{background:var(--green);color:var(--cream);padding:56px 0 28px;border-top:1px solid var(--green-3)}
.foot-cols{display:grid;grid-template-columns:1.6fr repeat(4,1fr);gap:28px}
.foot h2{font-size:14px;color:var(--gold);font-weight:600;margin-bottom:10px}
.foot-cols a,.foot-cols .linkbtn{display:block;font-size:14px;text-decoration:none;opacity:.85;padding:3px 0}
.foot-cols a:hover,.foot-cols .linkbtn:hover{opacity:1;text-decoration:underline}
.foot-soft{font-size:14px;color:var(--cream-soft);margin-top:8px}
.foot-meta{font-size:13px;color:var(--cream-soft);margin-top:40px;padding-top:18px;border-top:1px solid var(--green-3)}
.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%);background:var(--green);color:var(--gold);padding:12px 20px;border-radius:4px;z-index:30;font-size:15px}

@media (prefers-reduced-motion:no-preference){
  .js [data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .5s ease,transform .5s ease}
  .js [data-reveal].in{opacity:1;transform:none}
}
@media (max-width:1000px){
  .links,.right{display:none}
  .menu{display:block}
  .hero .wrap,.calc-wrap{grid-template-columns:1fr}
  .foot-cols{grid-template-columns:1fr 1fr}
  .docs{grid-template-columns:1fr;gap:24px}
  .side{position:static;flex-direction:row;flex-wrap:wrap}
}
@media (max-width:640px){
  .wrap{padding:0 18px}
  .hero{padding:44px 0 56px}
  .hero h1{font-size:34px}
  .hero .sub{font-size:17px}
  .phead h1{font-size:30px}
  .grid3,.grid2{grid-template-columns:1fr}
  .sh h2{font-size:26px}
  .nl li{grid-template-columns:1fr auto;gap:4px 12px}
  .nl li>a,.nl li>span:nth-child(2){grid-column:1/-1;grid-row:1}
  .entry summary{grid-template-columns:1fr auto;gap:4px 12px}
  .entry summary .t{grid-column:1/-1}
  .tbox{padding:4px 14px 10px}
  .foot-cols{grid-template-columns:1fr}
  .dl{grid-template-columns:1fr}
  .sh{flex-wrap:wrap}
  .mt thead{display:none}
  .mt tr{display:grid;grid-template-columns:repeat(3,1fr);gap:6px 12px;padding:16px 0;border-top:1px solid var(--line)}
  .mt tr:first-child{border-top:0}
  .mt td{border:0;padding:0;text-align:left}
  .mt td:first-child{grid-column:1/-1}
  .mt td:nth-child(2){grid-column:1/-1;color:var(--soft);font-size:14px}
  .mt td[data-l]::before{content:attr(data-l);display:block;font-size:13px;color:var(--soft)}
}