:root{--forest:#183f32;--forest-2:#285c48;--ink:#17211d;--paper:#f6f3eb;--paper-2:#ebe6d9;--lilac:#d9c9ef;--lilac-2:#ac91d2;--line:#9baa9f;--white:#fff;--max:1240px;--radius:18px;--shadow:0 14px 42px rgba(19,54,43,.12)}
*{box-sizing:border-box}html{scroll-behavior:smooth;overflow-x:hidden}body{margin:0;min-width:0;overflow-x:hidden;background:var(--paper);color:var(--ink);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;line-height:1.72}a{color:var(--forest);text-underline-offset:.2em}a:hover{color:#6d4a9e}img{display:block;max-width:100%;height:auto}button,input,select{font:inherit}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;z-index:99;left:1rem;top:-5rem;background:var(--white);padding:.7rem 1rem;border:2px solid var(--forest)}.skip-link:focus{top:1rem}.site-header{position:sticky;top:0;z-index:40;background:rgba(246,243,235,.94);border-bottom:1px solid rgba(24,63,50,.2);backdrop-filter:blur(18px)}.header-inner{position:relative;max-width:var(--max);min-height:74px;margin:auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;gap:24px}.wordmark{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:750;letter-spacing:.02em;color:var(--ink)}.wordmark-mark{display:grid;place-items:center;width:44px;height:44px;border-radius:50% 50% 8px 50%;background:var(--forest);color:var(--lilac);font-size:.82rem}.drawer{display:flex;align-items:center;gap:22px}.drawer a{text-decoration:none;font-size:.9rem;font-weight:650}.drawer-head,.drawer-close,.drawer-toggle,.drawer-scrim{display:none}.breadcrumb{max-width:var(--max);margin:auto;padding:22px 24px 0;display:flex;gap:9px;font-size:.8rem;color:#59675f}.type-hero{max-width:var(--max);margin:0 auto;padding:72px 24px 54px;display:grid;grid-template-columns:minmax(0,1fr) minmax(260px,.5fr);column-gap:52px;align-items:end;border-bottom:1px solid var(--line)}.eyebrow,.section-label,.aside-kicker{margin:0 0 12px;text-transform:uppercase;letter-spacing:.16em;font-size:.76rem;font-weight:800;color:var(--forest-2)}.type-hero h1{grid-column:1;margin:0;max-width:920px;font-family:Georgia,"Noto Serif SC","Songti SC",serif;font-size:clamp(3.2rem,8.6vw,8.4rem);line-height:.94;font-weight:500;letter-spacing:-.055em;overflow-wrap:anywhere}.hero-lede{grid-column:2;margin:0;font-size:1.05rem;color:#3f4d46}.hero-rule{grid-column:1/-1;margin-top:42px;padding-top:14px;border-top:4px solid var(--forest);display:flex;justify-content:space-between;gap:16px;font-size:.73rem;letter-spacing:.1em;text-transform:uppercase}.content-layout{max-width:var(--max);margin:0 auto;padding:64px 24px 100px;display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:72px}.article-body{min-width:0}.article-body>section{margin:0 0 78px}.article-body h2{margin:0 0 20px;font-family:Georgia,"Noto Serif SC","Songti SC",serif;font-weight:500;font-size:clamp(1.8rem,4vw,3.2rem);line-height:1.2;letter-spacing:-.025em}.article-body h3{margin:0 0 10px;font-size:1.12rem;line-height:1.4}.article-body p{max-width:76ch}.intro-panel{padding:32px;border:1px solid var(--forest);display:grid;grid-template-columns:.9fr 1.1fr;gap:36px;background:var(--lilac)}.intro-panel p{margin:0}.timeline{list-style:none;padding:0;margin:38px 0 0;border-top:1px solid var(--line)}.timeline li{display:grid;grid-template-columns:90px 1fr;padding:30px 0;border-bottom:1px solid var(--line)}.timeline-index,.file-number{font-family:Georgia,serif;color:var(--lilac-2);font-size:1.6rem}.timeline h3{font-family:Georgia,serif;font-size:1.55rem}.timeline a,.text-link{font-weight:750}.file-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.file-card{min-width:0;min-height:230px;padding:24px;border:1px solid var(--line);border-radius:var(--radius);background:rgba(255,255,255,.55);display:flex;flex-direction:column;box-shadow:0 0 0 rgba(0,0,0,0);transition:transform .2s ease,box-shadow .2s ease}.file-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}.file-card h3 a{text-decoration:none}.file-card p{font-size:.92rem}.file-card .text-link{margin-top:auto}.link-ledger{padding:0;list-style:none;counter-reset:ledger;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 32px;border-top:1px solid var(--line)}.link-ledger li{counter-increment:ledger;padding:15px 0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:42px 1fr;gap:8px}.link-ledger li:before{content:counter(ledger,decimal-leading-zero);color:var(--lilac-2);font-family:Georgia,serif}.tag-cloud{display:flex;flex-wrap:wrap;gap:10px}.tag-chip{padding:8px 13px;border:1px solid var(--forest);border-radius:999px;text-decoration:none;background:transparent}.faq-section details{border-top:1px solid var(--line);padding:20px 0}.faq-section details:last-child{border-bottom:1px solid var(--line)}summary{cursor:pointer;font-weight:750}.source-aside{position:sticky;top:110px;align-self:start;padding:18px;background:var(--forest);color:var(--paper);border-radius:var(--radius)}.source-aside img{border-radius:10px;background:var(--lilac);margin-bottom:20px}.source-aside a{color:var(--paper)}.article-meta{margin:0 0 34px;padding-bottom:16px;border-bottom:1px solid var(--line);display:flex;flex-wrap:wrap;gap:10px 24px;font-size:.8rem}.boundary-box,.method-steps,.source-protocol,.local-tool{padding:26px;border-left:5px solid var(--lilac-2);background:var(--paper-2)}.question-list,.check-list{padding:0;list-style:none}.question-list li,.check-list li{padding:14px 0 14px 34px;border-bottom:1px solid var(--line);position:relative}.question-list li:before,.check-list li:before{content:"↳";position:absolute;left:2px;color:var(--lilac-2);font-weight:900}.scope-columns{display:grid;grid-template-columns:1fr 1fr;gap:24px}.scope-columns>div{padding:24px;border:1px solid var(--line)}.button{display:inline-flex;min-height:46px;align-items:center;justify-content:center;padding:10px 18px;border:1px solid var(--forest);border-radius:999px;background:var(--forest);color:var(--white);font-weight:750;text-decoration:none;cursor:pointer}.button:hover{background:#6d4a9e;color:var(--white)}.button-secondary{background:transparent}.local-tool{display:grid;gap:14px;max-width:720px}.local-tool label{font-weight:650}.local-tool input[type=text],.local-tool select{width:100%;min-height:48px;border:1px solid var(--line);border-radius:9px;background:var(--white);padding:8px 12px}.local-tool fieldset{display:grid;gap:10px;border:1px solid var(--line);padding:18px}.tool-badge{width:max-content;padding:4px 10px;border-radius:999px;background:var(--lilac);font-size:.78rem;font-weight:800}.tool-output{min-height:58px;padding:14px;background:var(--white);border:1px dashed var(--forest)}.error-actions{display:flex;flex-wrap:wrap;gap:12px}.site-footer{background:var(--forest);color:var(--paper);padding:56px 24px 28px}.footer-grid{max-width:var(--max);margin:auto;display:grid;grid-template-columns:1fr 1fr 1fr;gap:42px}.footer-brand{font-family:Georgia,serif;font-size:1.8rem;margin:0}.site-footer nav{display:grid;grid-template-columns:1fr 1fr;gap:10px}.site-footer a{color:var(--paper)}.status-note{padding:18px;border:1px solid rgba(255,255,255,.35)}.status-note p{margin:.5rem 0 0}.copyright{max-width:var(--max);margin:40px auto 0;padding-top:18px;border-top:1px solid rgba(255,255,255,.25);font-size:.78rem}.site-footer code{overflow-wrap:anywhere}
@media(max-width:980px){.drawer{gap:12px}.drawer a{font-size:.78rem}.content-layout{grid-template-columns:minmax(0,1fr) 260px;gap:38px}.type-hero{grid-template-columns:1fr}.type-hero h1,.hero-lede{grid-column:1}.hero-lede{margin-top:26px;max-width:680px}}
@media(max-width:820px){.header-inner{min-height:66px;padding:0 18px}.drawer-toggle{display:grid;width:46px;height:46px;border:1px solid var(--forest);border-radius:50%;background:transparent;padding:12px;align-content:center;gap:6px}.drawer-toggle span:not(.sr-only){display:block;height:2px;background:var(--forest)}.drawer{position:fixed;z-index:52;right:0;top:0;width:min(88vw,390px);height:100dvh;padding:18px 24px 30px;background:var(--forest);display:flex;align-items:stretch;flex-direction:column;gap:0;transform:translateX(105%);transition:transform .25s ease;overflow-y:auto}.drawer.is-open{transform:translateX(0)}.drawer a{color:var(--paper);font-size:1rem;padding:13px 0;border-bottom:1px solid rgba(255,255,255,.16)}.drawer-head{display:flex;align-items:center;justify-content:space-between;color:var(--lilac);font-weight:800;padding-bottom:12px}.drawer-close{display:grid;place-items:center;width:46px;height:46px;border:1px solid var(--lilac);border-radius:50%;background:transparent;color:var(--paper);font-size:1.5rem}.drawer-scrim{display:block;position:fixed;z-index:51;inset:0;background:rgba(10,24,19,.58)}.drawer-scrim[hidden]{display:none}.type-hero{padding:52px 18px 40px}.breadcrumb{padding:18px 18px 0}.type-hero h1{font-size:clamp(3rem,16vw,6rem)}.hero-rule{flex-wrap:wrap}.content-layout{padding:48px 18px 72px;grid-template-columns:1fr}.source-aside{position:static}.intro-panel,.scope-columns{grid-template-columns:1fr}.file-grid{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr 1fr}.status-note{grid-column:1/-1}}
@media(max-width:560px){.wordmark>span:last-child{display:none}.type-hero{padding-top:42px}.type-hero h1{font-size:clamp(2.8rem,18vw,4.7rem)}.hero-lede{font-size:.98rem}.hero-rule{font-size:.66rem}.content-layout{padding-left:16px;padding-right:16px}.article-body>section{margin-bottom:56px}.intro-panel{padding:22px}.file-grid,.link-ledger,.footer-grid{grid-template-columns:1fr}.file-card{min-height:200px}.timeline li{grid-template-columns:58px 1fr}.site-footer nav{grid-template-columns:1fr}.button{width:100%}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}