:root{
 --bg:#f6f2ea;--paper:#fffdf8;--paper-2:#faf6ee;--ink:#1f2a25;--text:#3e4a44;--muted:#7d857f;
 --line:#e6dfd2;--line-2:#d9d0bf;--green:#2f5a48;--green-deep:#1e3d31;--green-pale:#e8efe9;--green-soft:#cfdfd5;
 --warm:#a87b3f;--warm-pale:#f6ecdc;
 --sans:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
 --serif:'Songti SC','STSong','Noto Serif CJK SC','Source Han Serif SC','SimSun',serif;
 --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
 --radius:16px
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;font:16px/1.8 var(--sans);background:var(--bg);color:var(--text);overflow-x:hidden}
h1,h2,h3,h4{color:var(--ink);margin:0}
p{margin:0 0 1em}
a{color:var(--green);text-decoration:underline;text-decoration-color:var(--green-soft);text-underline-offset:3px}
a:hover{text-decoration-color:var(--green)}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--green);outline-offset:3px;border-radius:4px}
b,strong{color:var(--ink);font-weight:650}
code{font:.86em/1.5 var(--mono);background:var(--green-pale);color:var(--green-deep);padding:.1em .4em;border-radius:5px;overflow-wrap:anywhere}
code.wrap{word-break:break-all}
.small{font-size:14px;color:var(--muted)}
.skip{position:absolute;left:-999px;top:8px;background:var(--green);color:#fff;padding:8px 14px;border-radius:8px;z-index:20}
.skip:focus{left:12px}

/* masthead */
.masthead{background:var(--paper);border-bottom:1px solid var(--line)}
.masthead-inner{max-width:1140px;margin:0 auto;padding:14px 24px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-weight:800;font-size:20px;line-height:1.1}
.brand small{display:block;font-size:9px;letter-spacing:3px;color:var(--muted);font-weight:600;margin-top:3px}
.brand-mark{width:34px;height:36px;border-radius:11px;background:var(--green);color:#fff;display:grid;place-items:center;font-size:22px}
.top-links{display:flex;gap:6px;flex-wrap:wrap}
.top-links a{font-size:14px;color:var(--text);text-decoration:none;padding:6px 12px;border-radius:999px}
.top-links a:hover{background:var(--green-pale);color:var(--green-deep)}

/* hero */
.hero{border-bottom:1px solid var(--line)}
.hero-inner{max-width:1140px;margin:0 auto;padding:64px 24px 52px}
.eyebrow{font-size:12px;letter-spacing:3px;color:var(--warm);font-weight:600;margin-bottom:16px}
.hero h1{font-family:var(--serif);font-size:clamp(30px,5vw,46px);line-height:1.3;font-weight:700;letter-spacing:.5px;margin-bottom:20px}
.lede{font-size:17px;max-width:36em;color:var(--text)}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:28px 0 40px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 22px;border-radius:999px;font-size:15px;font-weight:600;text-decoration:none;transition:background .15s,transform .15s}
.btn.primary{background:var(--green);color:#fff}
.btn.primary:hover{background:var(--green-deep);transform:translateY(-1px)}
.btn.ghost{border:1px solid var(--line-2);color:var(--ink);background:var(--paper)}
.btn.ghost:hover{border-color:var(--green)}
.facts{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;max-width:760px}
.facts li{background:var(--paper);padding:16px 20px}
.facts b{display:block;font-size:18px;color:var(--green-deep)}
.facts span{font-size:13px;color:var(--muted)}

/* layout */
.layout{max-width:1140px;margin:0 auto;padding:0 24px;display:grid;grid-template-columns:220px minmax(0,1fr);gap:56px}
.toc-wrap{position:relative}
.toc{position:sticky;top:24px;margin-top:48px;font-size:14px}
.toc summary{list-style:none;font-weight:650;color:var(--ink);cursor:default;padding-bottom:10px;border-bottom:1px solid var(--line);margin-bottom:10px;letter-spacing:2px}
.toc summary::-webkit-details-marker{display:none}
.toc-group{font-size:11px;letter-spacing:2px;color:var(--warm);margin:16px 0 4px;font-weight:600}
.toc ol{list-style:none;margin:0;padding:0}
.toc a{display:block;padding:5px 10px;margin-left:-10px;border-radius:8px;color:var(--text);text-decoration:none;border-left:2px solid transparent}
.toc a:hover{background:var(--green-pale)}
.toc a.active{color:var(--green-deep);font-weight:650;background:var(--green-pale);border-left-color:var(--green)}

.content{min-width:0;max-width:760px;padding:48px 0 80px}
.chapter{padding:8px 0 56px;margin-bottom:48px;border-bottom:1px solid var(--line);scroll-margin-top:24px}
.chapter:last-of-type{border-bottom:0}
.chapter-no{font-family:var(--serif);font-size:15px;color:var(--warm);letter-spacing:2px;margin-bottom:4px}
.chapter h2{font-family:var(--serif);font-size:clamp(24px,3.4vw,30px);line-height:1.35;margin-bottom:14px}
h3.sub{font-size:18px;margin:36px 0 14px;scroll-margin-top:24px}

/* trio notes */
.trio{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:22px}
.note{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.note h3{font-size:16px;margin-bottom:8px}
.note p{font-size:14px;margin:0}

/* steps */
.steps{list-style:none;counter-reset:step;margin:26px 0;padding:0}
.steps>li{counter-increment:step;position:relative;padding:0 0 26px 56px}
.steps>li::before{content:counter(step);position:absolute;left:0;top:0;width:36px;height:36px;border-radius:50%;background:var(--green);color:#fff;font-weight:700;display:grid;place-items:center;font-size:15px}
.steps>li::after{content:'';position:absolute;left:17px;top:42px;bottom:4px;width:2px;background:var(--green-soft)}
.steps>li:last-child{padding-bottom:0}
.steps>li:last-child::after{display:none}
.steps h3{font-size:17px;line-height:36px;margin-bottom:4px}
.steps p{margin-bottom:.6em}
.steps.compact>li{padding-bottom:18px}
.steps.compact>li::before{background:var(--paper);color:var(--green);border:2px solid var(--green)}
.steps.compact h3{font-size:16px}
.steps.compact p{font-size:15px}

/* prompt box */
.prompt-box{position:relative;background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin:12px 0}
.prompt-label{font-size:12px;color:var(--warm);font-weight:600;letter-spacing:1px;margin:0 0 6px}
.prompt-box pre{margin:0;font:14px/1.7 var(--mono);color:var(--ink);white-space:pre-wrap;overflow-wrap:anywhere}
.copy{display:none;position:absolute;top:10px;right:10px;font:inherit;font-size:13px;padding:4px 12px;border-radius:999px;border:1px solid var(--line-2);background:var(--paper-2);color:var(--green-deep);cursor:pointer}
.js .copy{display:inline-block}
.js .prompt-box .prompt-label{padding-right:64px}
.copy:hover{border-color:var(--green)}
.copy.done{background:var(--green);color:#fff;border-color:var(--green)}

/* mock UI */
.mock{margin:30px 0;background:var(--paper-2);border:1px dashed var(--line-2);border-radius:var(--radius);padding:20px;display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:22px;align-items:center}
.mock figcaption{grid-column:1/-1;font-size:13px;color:var(--muted)}
.tag{display:inline-block;font-size:12px;font-weight:600;color:var(--warm);background:var(--warm-pale);border-radius:6px;padding:2px 8px;margin-right:8px}
.mock-panel{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px;font-size:13px;box-shadow:0 6px 18px #2f5a4810}
.mock-field{position:relative;margin-bottom:12px}
.mock-label{display:block;font-size:12px;font-weight:600;color:var(--ink);margin-bottom:5px}
.mock-select,.mock-text{display:block;border:1px solid var(--line);border-radius:9px;padding:8px 10px;background:var(--paper-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mock-select{border-color:var(--green);box-shadow:0 0 0 3px var(--green-pale)}
.mock-select i{float:right;font-style:normal;color:var(--muted)}
.mock-row{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:12px}
.mock-chip{font-size:11px;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:2px 8px}
.mock-quote{position:relative;display:flex;justify-content:space-between;align-items:center;padding:8px 0;border-top:1px solid var(--line)}
.mock-quote b{font-size:20px;color:var(--green);margin-right:30px}
.mock-button{background:var(--green);color:#fff;border-radius:9px;padding:10px 14px;font-weight:600;margin-top:6px}
.pin{position:absolute;right:-8px;top:-8px;width:24px;height:24px;border-radius:50%;background:var(--warm);color:#fff;font-size:13px;display:grid;place-items:center;font-weight:700}
.mock-quote .pin{top:50%;transform:translateY(-50%);right:0}
.mock-legend{margin:0;padding-left:1.3em;font-size:14px}
.mock-legend li{margin-bottom:8px}
.mock-legend li::marker{color:var(--warm);font-weight:700}

/* details aside */
details.aside{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:0 18px;margin:18px 0}
details.aside summary{cursor:pointer;padding:14px 0;font-weight:600;color:var(--ink);list-style:none;display:flex;justify-content:space-between;gap:12px}
details.aside summary::-webkit-details-marker{display:none}
details.aside summary::after{content:'＋';color:var(--green)}
details.aside[open] summary::after{content:'－'}
details.aside>*:last-child{margin-bottom:16px}
details.aside p{font-size:15px}

/* tables */
.table-wrap{overflow-x:auto;margin:22px 0;border:1px solid var(--line);border-radius:var(--radius);background:var(--paper);-webkit-overflow-scrolling:touch}
table{width:100%;border-collapse:collapse;font-size:15px}
caption{text-align:left;padding:14px 18px 6px;font-size:13px;color:var(--muted)}
th,td{padding:11px 18px;text-align:left;vertical-align:top;border-top:1px solid var(--line)}
thead th{font-size:13px;color:var(--muted);font-weight:600;background:var(--paper-2)}
tbody th{color:var(--ink);font-weight:600}
td b{color:var(--green)}
table.params th[scope=row]{white-space:nowrap}
.cell-note{display:block;font-size:13px;color:var(--muted);margin-top:2px}

/* flow */
.flow{list-style:none;padding:0;margin:0 0 14px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;counter-reset:f}
.flow li{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:14px;position:relative}
.flow li:last-child{background:var(--green-pale);border-color:var(--green-soft)}
.flow b{display:block;font-size:15px;color:var(--green-deep)}
.flow span{font-size:13px;color:var(--muted);line-height:1.6;display:block}

/* references */
.refs-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.ref{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:18px;display:flex;flex-direction:column}
.ref-kicker{font-size:12px;color:var(--warm);font-weight:600;margin-bottom:4px}
.ref h4{font-size:17px;margin-bottom:6px}
.ref p{font-size:14px}
.ref .price{margin:auto 0 0;padding-top:10px;border-top:1px solid var(--line);color:var(--green-deep);font-size:13px}

/* callout */
.callout{background:var(--green-pale);border-left:3px solid var(--green);border-radius:0 12px 12px 0;padding:16px 20px;margin:22px 0}
.callout p{margin:0;font-size:15px}
.callout.warn{background:var(--warm-pale);border-left-color:var(--warm)}

/* tavern paths */
.paths{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:20px 0 8px}
.path{border-radius:var(--radius);padding:20px;border:1px solid var(--line);background:var(--paper)}
.path.verified{border-color:var(--green-soft);box-shadow:inset 0 3px 0 var(--green)}
.path.pending{background:var(--paper-2);box-shadow:inset 0 3px 0 var(--line-2)}
.path-tag{font-size:12px;font-weight:600;margin-bottom:6px;color:var(--muted)}
.path.verified .path-tag{color:var(--green)}
.path h3{font-size:17px;margin-bottom:8px}
.path p:last-child{margin:0;font-size:14px}
.arch{display:flex;align-items:stretch;gap:8px;margin:20px 0}
.arch-node{flex:1;min-width:0;background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:12px}
.arch-node b{display:block;font-size:14px}
.arch-node span{display:block;font-size:12px;color:var(--muted);line-height:1.6}
.arch-node:nth-child(5){border-color:var(--warm);background:var(--warm-pale)}
.arch-arrow{align-self:center;color:var(--green);font-weight:700}
.checklist{counter-reset:c;list-style:none;padding:0;margin:20px 0;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius)}
.checklist li{counter-increment:c;padding:12px 18px 12px 54px;position:relative;border-top:1px solid var(--line);font-size:15px}
.checklist li:first-child{border-top:0}
.checklist li::before{content:counter(c,decimal-leading-zero);position:absolute;left:18px;top:12px;font-family:var(--serif);color:var(--warm);font-weight:700}
.plain{list-style:none;padding:0;margin:0 0 1em}
.plain li{margin:6px 0}
.plain.dots{padding-left:1.2em;list-style:disc}
.plain.dots li{font-size:15px}

/* practice */
.practice{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:20px}
.drill{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.drill-no{font-size:12px;color:var(--warm);font-weight:600;margin-bottom:4px}
.drill h3{font-size:17px;margin-bottom:10px}
.drill ol{margin:0;padding-left:1.2em;font-size:14px}
.drill li{margin-bottom:6px}

/* faq */
.faq-tools{display:flex;justify-content:flex-end;margin-top:-6px}
.text-btn{font:inherit;font-size:14px;color:var(--green);background:none;border:0;cursor:pointer;padding:4px 0}
.faq{border-top:1px solid var(--line);margin-top:8px}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;list-style:none;padding:16px 36px 16px 0;position:relative;font-weight:600;color:var(--ink);line-height:1.6}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:'＋';position:absolute;right:4px;top:16px;color:var(--green)}
.faq details[open] summary::after{content:'－'}
.faq details p{font-size:15px;padding-bottom:6px}

/* api / refs */
.api-flow{padding-left:1.3em;font-size:15px}
.api-flow li{margin-bottom:8px}
.ref-list{list-style:none;padding:0;margin:0 0 18px}
.ref-list li{padding:12px 0;border-bottom:1px solid var(--line)}
.ref-list span{display:block;font-size:13px;color:var(--muted)}

.end{text-align:center;padding:40px 24px;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius)}
.end>p:first-child{font-family:var(--serif);font-size:22px;color:var(--ink);margin-bottom:16px}
.end .small{margin:20px auto 0;max-width:30em}

/* responsive */
.mobile-toc-jump{display:none}
@media (max-width:960px){
 .mobile-toc-jump{display:block;position:fixed;z-index:10;right:18px;bottom:calc(18px + env(safe-area-inset-bottom,0px));padding:9px 16px;border:1px solid var(--line);border-radius:999px;background:var(--green);color:#fff;font-size:14px;font-weight:600;text-decoration:none;box-shadow:0 4px 16px #223b3020}
 .layout{grid-template-columns:minmax(0,1fr);gap:0}
 .toc{position:static;margin:24px 0 0;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:4px 18px}
 .toc summary{cursor:pointer;border:0;margin:0;padding:12px 0;display:flex;justify-content:space-between}
 .toc summary::after{content:'展开';font-weight:400;letter-spacing:0;color:var(--green);font-size:13px}
 .toc[open] summary::after{content:'收起'}
 .toc nav{padding-bottom:12px}
 .content{padding-top:32px;max-width:none}
 .trio,.refs-grid,.practice{grid-template-columns:minmax(0,1fr)}
 .mock{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:640px){
 body{font-size:15px}
 .hero-inner{padding:40px 18px 36px}
 .masthead-inner,.layout{padding-left:18px;padding-right:18px}
 .top-links{display:none}
 .facts{grid-template-columns:minmax(0,1fr)}
 .paths{grid-template-columns:minmax(0,1fr)}
 .flow{grid-template-columns:repeat(2,minmax(0,1fr))}
 .arch{flex-direction:column}
 .arch-arrow{transform:rotate(90deg)}
 .steps>li{padding-left:48px}
 .chapter{padding-bottom:40px;margin-bottom:36px}
 th,td{padding:10px 14px}
 table.params th[scope=row]{white-space:normal;min-width:5.5em}
 table{font-size:14px}
}
@media print{.toc-wrap,.masthead,.hero-actions,.copy,.faq-tools{display:none}.layout{display:block}.faq details{display:block}}