:root{--paper: #fbf7f0;--paper-tint: #f4ecdf;--paper-card: #fdfaf4;--ink: #1a1714;--ink-soft: #6b6258;--rule: #e6ddcd;--rule-strong: #d8cbb3;--cinnabar: #9e2b25;--cinnabar-deep: #7e211c;--cinnabar-wash: #f3e3df;--serif: "Newsreader", Georgia, "Times New Roman", serif;--display: "Fraunces", Georgia, serif;--cjk: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;--mono: "Spline Sans Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;--maxw: 1120px;--gutter: clamp(20px, 5vw, 64px)}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--serif);font-size:18px;line-height:1.7;font-weight:400;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}body:before{content:"";position:fixed;inset:0;pointer-events:none;z-index:0;background-image:radial-gradient(circle at 50% 0%,rgba(158,43,37,.035),transparent 60%)}h1,h2,h3,h4{font-family:var(--display);font-weight:600;line-height:1.12;letter-spacing:-.012em;margin:0;color:var(--ink)}p{margin:0}a{color:inherit}:lang(zh),.zh{font-family:var(--cjk)}.wrap{max-width:var(--maxw);margin:0 auto;padding-inline:var(--gutter);position:relative;z-index:1}.section{padding-block:clamp(56px,9vw,116px);position:relative;z-index:1}.eyebrow{font-family:var(--mono);font-size:12px;font-weight:500;letter-spacing:.22em;text-transform:uppercase;color:var(--cinnabar);display:inline-flex;align-items:center;gap:10px;margin:0 0 18px}.eyebrow:before{content:"";width:22px;height:1px;background:var(--cinnabar)}.section-title{font-size:clamp(1.9rem,4.2vw,3rem);max-width:18ch}.lede{font-size:clamp(1.05rem,1.6vw,1.28rem);color:var(--ink-soft);max-width:60ch;margin-top:20px;line-height:1.65}.skip{position:absolute;left:-9999px;top:0;background:var(--ink);color:var(--paper);padding:12px 20px;z-index:999;font-family:var(--mono);font-size:13px;text-decoration:none}.skip:focus{left:12px;top:12px}:where(a,button):focus-visible{outline:2px solid var(--cinnabar);outline-offset:3px;border-radius:2px}.masthead{border-bottom:1px solid var(--rule);position:relative;z-index:1}.masthead-inner{max-width:var(--maxw);margin:0 auto;padding:22px var(--gutter);display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}.brand{display:flex;align-items:center;gap:14px;text-decoration:none}.brand-seal{width:42px;height:42px;border-radius:9px;background:var(--cinnabar);color:var(--paper);font-family:var(--cjk);font-weight:700;font-size:26px;display:grid;place-items:center;flex-shrink:0}.brand-name{font-family:var(--display);font-weight:600;font-size:1.18rem;letter-spacing:-.01em;line-height:1.1}.brand-name span{display:block;font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-soft);margin-top:4px}.masthead-nav{display:flex;gap:28px;font-family:var(--mono);font-size:12.5px;letter-spacing:.08em;text-transform:uppercase}.masthead-nav a{text-decoration:none;color:var(--ink-soft);padding-bottom:3px;border-bottom:1px solid transparent;transition:color .16s ease,border-color .16s ease}.masthead-nav a:hover{color:var(--cinnabar);border-bottom-color:var(--cinnabar)}@media(max-width:760px){.masthead-nav{display:none}}.hero{padding-block:clamp(58px,11vw,132px);border-bottom:1px solid var(--rule);position:relative;z-index:1}.hero-grid{display:grid;grid-template-columns:1fr auto;gap:clamp(36px,6vw,80px);align-items:center}.hero-kicker{font-family:var(--mono);font-size:13px;letter-spacing:.16em;text-transform:uppercase;color:var(--cinnabar);margin:0 0 26px}.hero h1{font-size:clamp(2.5rem,6.4vw,4.6rem);letter-spacing:-.02em;line-height:1.04;max-width:14ch}.hero h1 em{font-style:italic;font-weight:500;color:var(--cinnabar)}.hero-sub{font-size:clamp(1.08rem,1.7vw,1.35rem);color:var(--ink-soft);max-width:52ch;margin-top:26px;line-height:1.6}.hero-levels{display:flex;flex-wrap:wrap;gap:10px;margin-top:34px}.level-chip{font-family:var(--mono);font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--ink);background:var(--paper-tint);border:1px solid var(--rule-strong);border-radius:999px;padding:7px 15px}.hero-seal{display:flex;flex-direction:column;align-items:center;gap:18px;padding:30px 26px;border:1px solid var(--rule-strong);background:var(--paper-card);border-radius:4px}.hero-seal-mark{font-family:var(--cjk);font-weight:700;font-size:clamp(2.6rem,5.5vw,4.4rem);line-height:1.18;color:var(--paper);background:var(--cinnabar);padding:22px 16px;border-radius:6px;writing-mode:vertical-rl;letter-spacing:.06em}.hero-seal-en{font-family:var(--display);font-style:italic;font-size:1rem;color:var(--ink-soft);text-align:center;max-width:9ch;line-height:1.3}@media(max-width:860px){.hero-grid{grid-template-columns:1fr}.hero-seal{flex-direction:row;justify-content:flex-start;gap:22px;padding:22px 24px}.hero-seal-mark{writing-mode:horizontal-tb;font-size:clamp(2rem,9vw,2.8rem);padding:14px 20px}.hero-seal-en{text-align:left;max-width:20ch}}.why{background:var(--paper-tint);border-bottom:1px solid var(--rule)}.why-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--rule);border:1px solid var(--rule);margin-top:48px}.why-cell{background:var(--paper);padding:clamp(28px,4vw,44px)}.why-cell .n{font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:var(--cinnabar)}.why-cell h3{font-size:1.4rem;margin:14px 0 12px}.why-cell p{color:var(--ink-soft);font-size:1rem;line-height:1.62}@media(max-width:720px){.why-grid{grid-template-columns:1fr}}.prog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:52px}.prog-card{background:var(--paper-card);border:1px solid var(--rule);border-radius:4px;padding:30px 28px;display:flex;flex-direction:column;position:relative;transition:border-color .18s ease,transform .18s ease}.prog-card:before{content:"";position:absolute;left:0;top:26px;bottom:26px;width:3px;background:var(--cinnabar);opacity:0;transition:opacity .18s ease}.prog-card:hover{border-color:var(--rule-strong);transform:translateY(-3px)}.prog-card:hover:before{opacity:1}.prog-label{font-family:var(--mono);font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--cinnabar)}.prog-card h3{font-size:1.42rem;margin:12px 0 6px}.prog-card .lvl{font-family:var(--serif);font-style:italic;font-size:.95rem;color:var(--ink-soft);margin-bottom:14px}.prog-card p{color:var(--ink-soft);font-size:.98rem;line-height:1.6}@media(max-width:920px){.prog-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:620px){.prog-grid{grid-template-columns:1fr}}.teach{background:var(--ink);color:var(--paper)}.teach .eyebrow{color:#e6b3ae}.teach .eyebrow:before{background:#e6b3ae}.teach .section-title{color:var(--paper)}.teach-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin-top:50px;border-top:1px solid rgba(251,247,240,.16)}.teach-cell{padding:38px 32px 38px 0;border-right:1px solid rgba(251,247,240,.16)}.teach-cell:last-child{border-right:none;padding-right:0}.teach-cell:not(:first-child){padding-left:32px}.teach-cell .num{font-family:var(--display);font-size:2.4rem;font-weight:600;color:var(--cinnabar);line-height:1}.teach-cell .num em{color:#e6b3ae;font-style:normal}.teach-cell h3{color:var(--paper);font-size:1.32rem;margin:20px 0 12px}.teach-cell p{color:#fbf7f0bd;font-size:1rem;line-height:1.62}@media(max-width:800px){.teach-grid{grid-template-columns:1fr}.teach-cell{padding:30px 0;border-right:none;border-bottom:1px solid rgba(251,247,240,.16)}.teach-cell:not(:first-child){padding-left:0}.teach-cell:last-child{border-bottom:none}}.sizes{background:var(--paper-tint);border-bottom:1px solid var(--rule)}.sizes-table{margin-top:46px;border:1px solid var(--rule-strong);background:var(--paper);border-radius:4px;overflow:hidden}.sizes-row{display:grid;grid-template-columns:1fr auto;align-items:baseline;gap:20px;padding:22px clamp(20px,4vw,38px);border-bottom:1px solid var(--rule)}.sizes-row:last-child{border-bottom:none}.sizes-row.head{background:var(--ink);color:var(--paper);font-family:var(--mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase}.sizes-row .stage{font-family:var(--display);font-size:1.25rem;font-weight:600}.sizes-row .stage small{display:block;font-family:var(--serif);font-style:italic;font-weight:400;font-size:.92rem;color:var(--ink-soft);margin-top:4px}.sizes-row .cap{font-family:var(--display);font-size:2rem;font-weight:700;color:var(--cinnabar);font-variant-numeric:tabular-nums;white-space:nowrap}.sizes-row .cap span{font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-soft);margin-left:8px}.sizes-row.head .stage,.sizes-row.head .cap{font-family:var(--mono);font-size:12px;font-weight:500;color:var(--paper)}.sizes-note{font-size:.98rem;color:var(--ink-soft);margin-top:22px;max-width:64ch}.faq-list{margin-top:46px;border-top:1px solid var(--rule)}.faq-item{border-bottom:1px solid var(--rule)}.faq-item summary{list-style:none;cursor:pointer;padding:26px 44px 26px 0;position:relative;font-family:var(--display);font-size:clamp(1.1rem,2vw,1.32rem);font-weight:600;color:var(--ink);transition:color .16s ease}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:hover{color:var(--cinnabar)}.faq-item summary:after{content:"+";position:absolute;right:4px;top:50%;transform:translateY(-50%);font-family:var(--display);font-size:1.5rem;font-weight:400;color:var(--cinnabar);transition:transform .2s ease}.faq-item[open] summary:after{content:"–"}.faq-item .answer{padding:0 44px 28px 0;color:var(--ink-soft);font-size:1.04rem;line-height:1.7;max-width:72ch}.faq-item .answer .table{margin:14px 0 4px;font-family:var(--mono);font-size:.92rem;color:var(--ink)}.faq-item .answer .table div{padding:6px 0;border-bottom:1px dotted var(--rule-strong)}.faq-item .answer .table div:last-child{border-bottom:none}.featured{background:var(--paper-tint);border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}.featured-inner{display:flex;align-items:center;gap:clamp(20px,5vw,56px);flex-wrap:wrap}.featured-label{font-family:var(--mono);font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-soft)}.featured-names{display:flex;gap:clamp(20px,4vw,44px);flex-wrap:wrap;font-family:var(--display);font-size:clamp(1.1rem,2.4vw,1.6rem);font-weight:600;color:var(--ink)}.featured-names span{position:relative}.featured-names span:not(:last-child):after{content:"·";position:absolute;right:clamp(-22px,-2vw,-10px);color:var(--cinnabar)}.foot{background:var(--ink);color:var(--paper);padding-block:clamp(48px,7vw,80px);position:relative;z-index:1}.foot-notice{display:flex;align-items:flex-start;gap:18px;padding:26px 28px;border:1px solid rgba(251,247,240,.2);border-left:3px solid var(--cinnabar);border-radius:3px;background:#fbf7f008;max-width:760px}.foot-notice .mark{font-family:var(--cjk);font-weight:700;font-size:1.5rem;color:#e6b3ae;flex-shrink:0;line-height:1.2}.foot-notice p{font-size:1.02rem;line-height:1.6;color:#fbf7f0db}.foot-notice p strong{color:var(--paper);font-weight:600}.foot-meta{margin-top:40px;padding-top:28px;border-top:1px solid rgba(251,247,240,.16);display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:#fbf7f099}.foot-meta a{color:#fbf7f0db;text-decoration:none;border-bottom:1px solid rgba(251,247,240,.4);transition:border-color .16s ease}.foot-meta a:hover{border-bottom-color:var(--paper)}.reveal{opacity:0;transform:translateY(20px);transition:opacity .62s ease,transform .62s ease}.reveal.in{opacity:1;transform:none}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}.reveal{opacity:1!important;transform:none!important}}.hellobar[data-astro-cid-jzutvqlb]{background:#0a0a0a;color:#fafafa;border-bottom:1px solid rgba(255,255,255,.12)}.hellobar-inner[data-astro-cid-jzutvqlb]{max-width:1240px;margin:0 auto;padding:10px 44px 10px 20px;display:flex;align-items:center;justify-content:center;position:relative}.hellobar-link[data-astro-cid-jzutvqlb]{font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Helvetica,Arial,sans-serif;font-size:14px;letter-spacing:0;color:#fafafa;text-decoration:none;display:inline-flex;align-items:baseline;gap:8px;flex-wrap:wrap;justify-content:center;transition:color .18s ease}.hellobar-pre[data-astro-cid-jzutvqlb]{font-weight:400;color:#fafafa}.hellobar-cta[data-astro-cid-jzutvqlb]{font-weight:700;color:#fafafa;border-bottom:1px solid rgba(255,255,255,.6);padding-bottom:1px;transition:border-color .18s ease}.hellobar-link[data-astro-cid-jzutvqlb]:hover .hellobar-cta[data-astro-cid-jzutvqlb]{border-bottom-color:#fafafa}.hellobar-link[data-astro-cid-jzutvqlb]:focus-visible{outline:2px solid var(--accent, #FAFAFA);outline-offset:3px;border-radius:2px}.hellobar-close[data-astro-cid-jzutvqlb]{position:absolute;right:12px;top:50%;transform:translateY(-50%);width:26px;height:26px;display:inline-flex;align-items:center;justify-content:center;color:#ffffff8c;font-size:18px;line-height:1;background:transparent;border:none;cursor:pointer;transition:color .18s ease,background .18s ease}.hellobar-close[data-astro-cid-jzutvqlb]:hover{color:#fafafa;background:#ffffff14}.hellobar-close[data-astro-cid-jzutvqlb]:focus-visible{outline:2px solid var(--accent, #FAFAFA);outline-offset:2px}@media(max-width:720px){.hellobar-inner[data-astro-cid-jzutvqlb]{padding:10px 40px 10px 16px}.hellobar-link[data-astro-cid-jzutvqlb]{font-size:13px;gap:6px}}