:root{color-scheme:light;--paper:#faf8f4;--white:#fffefa;--ink:#233746;--muted:#576575;--line:#dcdedc;--blue:#253f54;--coral:#a84135;font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans",sans-serif;background:var(--paper);color:var(--ink);line-height:1.65}
*{box-sizing:border-box}body{margin:0}a{color:var(--blue);text-underline-offset:.22em}a:focus-visible{outline:3px solid var(--coral);outline-offset:3px}img{max-width:100%;height:auto;display:block}
.skip{position:absolute;left:12px;top:-100px;padding:10px;background:#fff}.skip:focus{top:10px}
.yi-header{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;max-width:1040px;margin:auto;padding:20px 16px;border-bottom:1px solid var(--line)}
.yi-brand{display:inline-flex;align-items:center;gap:10px;min-height:44px;text-decoration:none;font-family:Georgia,"Noto Serif",serif;font-size:1.25rem;color:var(--ink)}
.yi-languages{display:flex;gap:14px;flex-wrap:wrap;font-size:.85rem}.yi-languages a{display:inline-flex;align-items:center;min-height:44px}.yi-languages [aria-current=page]{font-weight:700}
main{max-width:1040px;margin:auto;padding:32px 16px 56px}h1{font-family:Georgia,"Noto Serif",serif;font-size:clamp(2rem,6vw,3.2rem);margin:0 0 8px;font-weight:600}
.yi-hero{display:grid;grid-template-columns:1.2fr .8fr;gap:32px;align-items:center;margin-bottom:24px}.yi-slogan{font-size:1.2rem;margin:0 0 12px}.yi-lede{color:var(--muted);max-width:52ch}
.yi-shot img{max-height:520px;width:auto;margin:auto;border-radius:24px;box-shadow:0 12px 32px #2337461f}
.yi-primary{display:inline-flex;align-items:center;justify-content:center;min-height:48px;border-radius:12px;background:var(--blue);color:#fff;padding:12px 22px;text-decoration:none;font-weight:650}
.yi-card{background:var(--white);border:1px solid var(--line);border-radius:18px;padding:22px;margin:18px 0}.yi-card h2{margin-top:0;font-size:1.3rem}.yi-links a,.yi-footer nav a{display:inline-flex;min-height:44px;align-items:center;margin-right:16px}
.yi-footer{max-width:1040px;margin:auto;padding:20px 16px 36px;border-top:1px solid var(--line);font-size:.82rem;color:var(--muted)}
@media(max-width:720px){.yi-hero{grid-template-columns:1fr}.yi-shot img{max-height:420px}}