:root{color-scheme:light;--ink:#1a2b47;--muted:#58657c;--purple:#503799;--line:#ddddea;--paper:#fff;--back:#f7f6fb}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:1.5rem}body{margin:0;background:var(--back);color:var(--ink);font:17px/1.8 system-ui,-apple-system,"Segoe UI","Microsoft JhengHei","Microsoft YaHei",sans-serif}
a{color:var(--purple);text-underline-offset:.2em;overflow-wrap:anywhere}a:hover{text-decoration-thickness:2px}a:focus-visible{outline:3px solid #db9438;outline-offset:5px;border-radius:3px}
.skip{position:absolute;left:1rem;top:-5rem;background:white;padding:.5rem 1rem;z-index:5}.skip:focus{top:1rem}
.shell{max-width:1120px;margin:auto;padding:0 36px}.top{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-top:26px;padding-bottom:24px;border-bottom:1px solid var(--line)}
.brand{display:inline-flex;gap:10px;align-items:center;font-weight:850;font-size:25px;letter-spacing:-.04em;color:var(--ink);text-decoration:none}.mark{width:30px;height:30px;border-radius:50%;background:radial-gradient(circle at 32% 28%,#fff4be,#f5b438 45%,#c76d21);box-shadow:inset 0 -2px 3px #a15c2620}
nav{display:flex;gap:16px;flex-wrap:wrap;font-size:14px}nav a[aria-current]{font-weight:750;text-decoration:none;color:var(--ink)}
.hero{padding:54px 0 34px;max-width:760px}.eyebrow{font-size:13px;font-weight:750;letter-spacing:.13em;text-transform:uppercase;color:var(--purple);margin:0 0 8px}h1{font-size:clamp(32px,6vw,50px);letter-spacing:-.045em;line-height:1.18;margin:0 0 18px}h2{font-size:22px;line-height:1.4;letter-spacing:-.015em;margin:0 0 14px}.intro{font-size:19px;line-height:1.6;color:var(--muted);margin:0 0 18px}.updated{font-size:13px;color:var(--muted)}
.tabs{display:flex;gap:20px;flex-wrap:wrap;margin:0 0 30px;font-weight:650}.tabs a[aria-current]{text-decoration:none;color:var(--ink);border-bottom:3px solid #eab04d}
.layout{display:grid;grid-template-columns:235px minmax(0,1fr);gap:34px;padding-bottom:70px}.toc{align-self:start;font-size:13px;line-height:1.6;padding:18px;background:#efedf7;border-radius:14px}.toc a{display:block;margin:0 0 9px;text-decoration:none;color:#46536c}.toc a:last-child{margin-bottom:0}.toc a:hover{text-decoration:underline}.articles{min-width:0}.section{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:28px 30px;margin-bottom:16px}.section p{margin:0 0 16px;overflow-wrap:anywhere}.section p:last-child{margin:0}.cta{display:inline-block;color:white;background:var(--purple);padding:11px 20px;border-radius:9px;text-decoration:none;font-size:16px;font-weight:650;margin:0 0 26px}.cta:hover{background:#3e297c}.footer{border-top:1px solid var(--line);padding:25px 0 36px;font-size:13px;color:var(--muted)}.footer a{margin-right:16px}.home-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;padding-bottom:70px}.home-card{padding:28px;background:white;border:1px solid var(--line);border-radius:16px}.home-card a{display:block;margin-top:14px}
@media(max-width:820px){.layout{grid-template-columns:1fr;gap:20px}.toc{display:none}.shell{padding-left:24px;padding-right:24px}.hero{padding-top:36px}.home-grid{grid-template-columns:1fr}}
@media(max-width:440px){body{font-size:16px}.shell{padding-left:16px;padding-right:16px}.top{align-items:flex-start;flex-direction:column;gap:12px;padding-top:20px;padding-bottom:18px}nav{gap:14px}.hero{padding-top:30px;padding-bottom:24px}.intro{font-size:17px}h2{font-size:20px}.section{padding:21px 20px;border-radius:12px}.tabs{font-size:15px;gap:18px;margin-bottom:22px}.layout{padding-bottom:35px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}@media print{body{background:white;color:black;font-size:11pt}.shell{max-width:none;padding:0}.top,.tabs,.toc,.cta,.footer{display:none}.hero{padding:0 0 15pt}.layout{display:block}.section{padding:0;border:none;border-radius:0;margin-bottom:18pt;break-inside:avoid}h1{font-size:26pt}h2{font-size:15pt}a{color:inherit}.intro{font-size:12pt}}