:root{--color-bg:#fbf8f1;--color-text:#24211d;--color-muted:#6f685f;--color-border:#ded6c8;--color-accent:#536b4d;--color-accent-soft:#e5eadf;--font-body:ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-hand:"Segoe Print", "Bradley Hand", "Kaiti SC", cursive;--space-1:.25rem;--space-2:.5rem;--space-3:.75rem;--space-4:1rem;--space-5:1.5rem;--space-6:2rem;--space-7:3rem;--space-8:4rem;--width-content:72rem;--width-narrow:48rem;--radius-xs:3px;--radius-sm:6px;--line-hand:1px solid var(--color-border);--focus-ring:0 0 0 3px #536b4d59;--motion-duration:.18s;--motion-ease:cubic-bezier(.2, .8, .2, 1)}*{box-sizing:border-box}html{background:var(--color-bg);min-height:100%;color:var(--color-text);font-family:var(--font-body);text-rendering:optimizelegibility}body{background:var(--color-bg);min-height:100vh;color:var(--color-text);margin:0;line-height:1.6}body[data-menu-open]{overflow:hidden}a{color:inherit;text-underline-offset:.18em;text-decoration-thickness:1px}a:hover{color:var(--color-accent)}:focus-visible{outline:2px solid var(--color-accent);outline-offset:4px;box-shadow:var(--focus-ring)}img,svg{display:block}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}.skip-link{top:var(--space-3);left:var(--space-3);z-index:10;background:var(--color-text);min-height:44px;color:var(--color-bg);border-radius:var(--radius-sm);transition:transform var(--motion-duration) var(--motion-ease);padding:.7rem .95rem;position:fixed;transform:translateY(-140%)}.skip-link:focus{transform:translateY(0)}.site-header{border-bottom:var(--line-hand)}.site-header__inner{justify-content:space-between;align-items:center;gap:var(--space-5);width:min(100% - 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2rem, var(--width-content));min-height:calc(100vh - 172px);margin:0 auto}main:focus{outline:none}main:focus-visible{outline:2px solid var(--color-accent);outline-offset:8px;box-shadow:var(--focus-ring)}.page-intro{min-height:52vh;max-width:var(--width-narrow);padding:var(--space-8) 0;align-content:center;display:grid}h1{letter-spacing:0;max-width:11ch;margin:0;font-size:3.4rem;font-weight:650;line-height:1.05}[lang=zh] h1{max-width:8em;line-height:1.18}.build-note{max-width:32rem;margin:var(--space-6) 0 0;padding-left:var(--space-4);color:var(--color-muted);border-left:2px solid var(--color-accent-soft);font-size:.95rem}.site-footer{width:min(100% - 2rem, var(--width-content));padding:var(--space-6) 0 var(--space-7);color:var(--color-muted);border-top:var(--line-hand);font-family:var(--font-hand);margin:0 auto;font-size:.9rem}.site-footer p{margin:0}.not-found{min-height:72vh;padding:var(--space-8) 0;align-content:center;display:grid}.not-found p{max-width:36rem;margin:var(--space-4) 0 0;color:var(--color-muted)}.not-found__links{gap:var(--space-4);margin-top:var(--space-6);flex-wrap:wrap;display:flex}.not-found__links a{min-height:44px;color:var(--color-accent);align-items:center;display:inline-flex}@media (width<=720px){.site-header__inner{min-height:68px}.site-header__left{gap:var(--space-3)}.site-mark span{display:none}html.js .menu-toggle{display:inline-flex}.primary-nav{align-items:flex-start;gap:var(--space-2);padding:var(--space-3) 0 var(--space-4);background:var(--color-bg);border-top:var(--line-hand);flex:1 0 100%;margin:0;display:grid}html:not(.js) .site-header__inner{flex-wrap:wrap}html.js .primary-nav{z-index:5;padding:var(--space-4) 1rem var(--space-5);border-top:0;border-bottom:var(--line-hand);margin:0;display:none;position:fixed;top:68px;left:0;right:0}html.js .primary-nav[data-open]{display:grid}.primary-nav__link{width:100%;min-height:48px;font-size:1.05rem}h1{max-width:10ch;font-size:2.6rem}.page-intro{min-height:58vh;padding:var(--space-7) 0}}@media (width<=420px){.locale-switcher{gap:.4rem}.site-header__inner,main,.site-footer{width:min(100% - 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