:root{--forest:#153b34;--forest-2:#255247;--moss:#557565;--lilac:#c7b6d8;--lilac-2:#e7dff0;--paper:#f6f1e8;--paper-2:#fffdf8;--ink:#1c2925;--muted:#64726c;--line:#9ba9a1;--focus:#7a4e9d;--shadow:0 18px 48px rgba(21,59,52,.1);font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans SC","Microsoft YaHei",sans-serif;color-scheme:light}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);line-height:1.72;overflow-x:clip}a{color:inherit;text-decoration-thickness:.08em;text-underline-offset:.18em}button,input,select{font:inherit}button,a,input,select,summary{outline-offset:4px}:focus-visible{outline:3px solid var(--focus)}.skip-link{position:fixed;left:1rem;top:-6rem;z-index:99;background:var(--paper-2);padding:.7rem 1rem;border:2px solid var(--forest)}.skip-link:focus{top:1rem}.site-header{min-height:84px;padding:12px clamp(16px,4vw,64px);display:flex;align-items:center;gap:28px;border-bottom:1px solid var(--line);background:rgba(246,241,232,.96);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}.brand{display:grid;grid-template-columns:44px auto;grid-template-rows:auto auto;align-items:center;gap:0 10px;text-decoration:none;min-width:max-content}.brand>span{grid-row:1/3;width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:var(--forest);color:white;font-family:Georgia,serif;font-size:1.3rem}.brand strong{font-size:1.04rem;letter-spacing:.08em;line-height:1.2}.brand small{color:var(--muted);font-size:.72rem}.site-nav{margin-left:auto;display:flex;align-items:center;justify-content:flex-end;gap:clamp(12px,2vw,28px);font-size:.88rem}.site-nav a{text-decoration:none;border-bottom:1px solid transparent}.site-nav a:hover{border-color:currentColor}.nav-toggle{display:none;margin-left:auto;border:1px solid var(--forest);background:transparent;color:var(--forest);padding:.5rem .8rem}.site-shell{display:grid;grid-template-columns:220px minmax(0,1fr);max-width:1600px;margin:0 auto}.section-rail{padding:48px 20px 48px clamp(18px,3vw,48px);border-right:1px solid var(--line);display:flex;flex-direction:column;gap:14px;position:sticky;top:84px;align-self:start;max-height:calc(100vh - 84px);overflow:auto}.section-rail>span{text-transform:uppercase;letter-spacing:.14em;color:var(--muted);font-size:.7rem;margin-bottom:8px}.section-rail a{text-decoration:none;font-size:.84rem;padding:8px 0;border-bottom:1px solid rgba(155,169,161,.45)}main{min-width:0}.breadcrumbs{max-width:1180px;margin:0 auto;padding:24px clamp(18px,5vw,72px) 0;display:flex;gap:10px;color:var(--muted);font-size:.82rem}.hero{padding:clamp(54px,8vw,112px) clamp(18px,5vw,72px);min-height:660px;align-items:center;background:linear-gradient(130deg,var(--paper) 0 58%,var(--lilac-2) 58% 100%);border-bottom:1px solid var(--line)}.editorial-grid{display:grid;grid-template-columns:minmax(0,.82fr) minmax(0,1.18fr);gap:clamp(30px,6vw,88px)}.kicker,.eyebrow{display:block;color:var(--forest-2);font-size:.75rem;text-transform:uppercase;letter-spacing:.12em;font-weight:700}.hero h1{font-family:Georgia,"Noto Serif SC","Songti SC",serif;font-size:clamp(4rem,10vw,9.5rem);line-height:.92;letter-spacing:-.05em;margin:.22em 0 .3em;color:var(--forest)}.lede{font-size:clamp(1.05rem,1.6vw,1.35rem);max-width:46rem;color:#33443e}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0}.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:.65rem 1rem;border:1px solid var(--forest);text-decoration:none;cursor:pointer}.button.primary{background:var(--forest);color:white}.button.quiet{background:transparent;color:var(--forest)}.status-line{font-size:.82rem;color:var(--muted)}.status-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--moss);margin-right:8px}.topic-compass{aspect-ratio:1;max-width:460px;width:100%;justify-self:center;display:grid;grid-template-columns:1fr 1fr;position:relative;border:1px solid var(--forest);border-radius:50%;overflow:hidden;background:var(--paper-2);box-shadow:var(--shadow)}.topic-compass:before,.topic-compass:after{content:"";position:absolute;background:var(--forest);opacity:.5}.topic-compass:before{left:50%;top:0;width:1px;height:100%}.topic-compass:after{top:50%;left:0;height:1px;width:100%}.topic-compass a{padding:15%;display:flex;flex-direction:column;justify-content:center;text-decoration:none;min-width:0}.topic-compass a:nth-child(2),.topic-compass a:nth-child(4){text-align:right;align-items:flex-end}.topic-compass a:hover{background:var(--lilac-2)}.topic-compass span{color:var(--muted);font-size:.7rem}.topic-compass strong{font-family:Georgia,"Noto Serif SC",serif;font-size:clamp(1.2rem,2.6vw,2rem)}.topic-compass small{font-size:.7rem;color:var(--muted)}.topic-compass>b{position:absolute;inset:50% auto auto 50%;transform:translate(-50%,-50%);background:var(--forest);color:white;width:66px;height:66px;border-radius:50%;display:grid;place-items:center;font-family:Georgia,"Noto Serif SC",serif;z-index:2}.section-block{padding:clamp(50px,7vw,92px) clamp(18px,5vw,72px);max-width:1320px;margin:0 auto;border-bottom:1px solid var(--line)}.section-block h2{font-family:Georgia,"Noto Serif SC",serif;font-size:clamp(1.8rem,4vw,3.6rem);line-height:1.12;margin:.15em 0 .5em;color:var(--forest)}.section-block h3{line-height:1.35}.section-no{display:inline-grid;place-items:center;min-width:34px;height:28px;border:1px solid var(--forest);border-radius:50%;font-size:.72rem;color:var(--forest)}.section-heading{display:flex;gap:20px;align-items:start;margin-bottom:30px}.section-heading h2{margin-top:0}.section-heading p{color:var(--muted)}.prose p:first-child{font-size:1.14rem}.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,250px),1fr));gap:16px}.note-card{border:1px solid var(--line);background:var(--paper-2);padding:24px;min-width:0;box-shadow:0 0 0 rgba(0,0,0,0);transition:transform .18s ease,box-shadow .18s ease}.note-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}.note-card h3{font-family:Georgia,"Noto Serif SC",serif;font-size:1.25rem}.note-card h3 a{text-decoration:none}.note-card p{color:var(--muted);font-size:.92rem}.text-link{font-weight:700;color:var(--forest-2)}.method-list{list-style:none;margin:0;padding:0;display:grid;gap:0}.method-list li{display:grid;grid-template-columns:56px 1fr;gap:18px;padding:20px 0;border-top:1px solid var(--line)}.method-list li:last-child{border-bottom:1px solid var(--line)}.method-list li>span{font-family:Georgia,serif;color:var(--focus);font-size:1.4rem}.method-list h3{margin:0 0 6px}.method-list p{margin:0;color:var(--muted)}.method-list.compact{grid-template-columns:1fr 1fr;gap:0 28px}.rail-cards{display:grid;gap:12px}.rail-card{display:grid;grid-template-columns:minmax(120px,.45fr) 1fr;gap:18px;text-decoration:none;padding:18px;border:1px solid var(--line);background:var(--paper-2)}.rail-card span{color:var(--muted)}.tag-cloud{display:flex;flex-wrap:wrap;gap:10px}.tag{display:inline-flex;padding:.35rem .7rem;border:1px solid var(--moss);border-radius:999px;text-decoration:none;font-size:.84rem;margin:3px}.faq-list details{border-top:1px solid var(--line);padding:18px 0}.faq-list details:last-child{border-bottom:1px solid var(--line)}.faq-list summary{cursor:pointer;font-weight:700}.page-hero{padding:clamp(54px,8vw,104px) clamp(18px,5vw,72px) clamp(42px,6vw,76px);background:linear-gradient(115deg,var(--forest),#214b42);color:white;border-bottom:10px solid var(--lilac)}.page-hero h1{font-family:Georgia,"Noto Serif SC",serif;font-size:clamp(2.7rem,6vw,6.6rem);line-height:1.03;max-width:1050px;margin:.28em 0}.page-hero .kicker,.page-hero .lede,.page-hero a{color:white}.page-hero .lede{opacity:.88}.byline{font-size:.86rem;opacity:.78}.bordered-note{border:1px solid var(--forest);padding:clamp(22px,4vw,42px);background:var(--paper-2);position:relative}.bordered-note:before{content:"REFERENCE NOTE";position:absolute;top:-.72em;right:18px;background:var(--lilac-2);padding:2px 8px;font-size:.62rem;letter-spacing:.1em}.bordered-note h3{font-family:Georgia,"Noto Serif SC",serif;font-size:1.45rem}.callout{max-width:1180px;margin:48px auto;padding:30px clamp(18px,5vw,60px);background:var(--lilac-2);border-left:8px solid var(--forest)}.callout h2{font-family:Georgia,"Noto Serif SC",serif}.article-footer{padding:22px clamp(18px,5vw,72px);max-width:1320px;margin:0 auto}.tool-panel{border:1px solid var(--forest);background:var(--paper-2);padding:clamp(22px,4vw,38px);display:grid;gap:16px}.tool-panel fieldset{border:0;padding:0;margin:0;display:grid;gap:10px}.tool-panel legend{font-weight:700;margin-bottom:12px}.tool-panel label{display:grid;gap:6px}.tool-panel fieldset label{display:flex;align-items:center;gap:10px}.tool-panel input:not([type=checkbox]),.tool-panel select{width:100%;min-width:0;border:1px solid var(--line);background:white;padding:.7rem}.tool-panel output{display:block;border:1px dashed var(--moss);padding:14px;min-height:58px;white-space:pre-wrap;word-break:break-word}.not-found{background:var(--forest)}.not-found h1{max-width:900px}.site-footer{border-top:1px solid var(--line);background:#102f29;color:white;padding:48px clamp(18px,5vw,72px);display:grid;grid-template-columns:1.1fr 1.4fr .7fr;gap:40px}.site-footer nav{display:grid;grid-template-columns:1fr 1fr;gap:10px 22px}.site-footer a{color:white}.site-footer p{margin:.25rem 0}.muted{opacity:.7;font-size:.82rem}@media(max-width:1100px){.site-shell{grid-template-columns:1fr}.section-rail{position:static;max-height:none;border-right:0;border-bottom:1px solid var(--line);padding:14px 18px;display:flex;flex-direction:row;flex-wrap:wrap}.section-rail>span{width:100%;margin:0}.section-rail a{padding:4px 0}.site-nav{gap:12px;font-size:.76rem}.hero{min-height:580px}}@media(max-width:760px){.site-header{min-height:68px;padding:10px 16px;flex-wrap:wrap}.brand{grid-template-columns:38px auto}.brand>span{width:36px;height:36px}.nav-toggle{display:block}.site-nav{display:none;width:100%;order:3;margin:0;padding:8px 0 12px;flex-direction:column;align-items:stretch}.site-nav a{padding:8px 0;border-bottom:1px solid var(--line)}body[data-nav-open=true] .site-nav{display:flex}.section-rail{top:68px}.editorial-grid{grid-template-columns:1fr}.hero{background:linear-gradient(165deg,var(--paper) 0 57%,var(--lilac-2) 57%);min-height:auto}.hero h1{font-size:clamp(3.6rem,19vw,6.5rem)}.topic-compass{max-width:360px}.method-list.compact{grid-template-columns:1fr}.rail-card{grid-template-columns:1fr}.site-footer{grid-template-columns:1fr}.site-footer nav{grid-template-columns:1fr 1fr}.page-hero h1{font-size:clamp(2.4rem,12vw,4.5rem);overflow-wrap:anywhere}}@media(max-width:400px){.topic-compass small{display:none}.section-rail{gap:8px 12px}.section-rail a{font-size:.76rem}.site-footer nav{grid-template-columns:1fr}.button{width:100%}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.note-card{transition:none}}