.tu-shell{max-width:1060px;color:var(--text);margin:0 auto;padding:40px 28px 90px;font-size:15px;font-weight:400;line-height:1.6}.tu-shell h1,.tu-shell h2,.tu-shell h3,.tu-shell h4{letter-spacing:-.015em;margin:0;font-weight:650}.tu-shell a{color:inherit}.tu-crumb{color:var(--muted);margin-bottom:26px;font-size:13px}.tu-crumb a{text-decoration:none}.tu-crumb a:hover{color:var(--text)}.tu-crumb b{color:var(--text);font-weight:600}.tu-hero{padding:10px 0}.tu-hero h1{margin:10px 0 14px;font-size:clamp(30px,5vw,44px)}.tu-hero p{max-width:640px;color:var(--muted);margin:0;font-size:16px}.tu-toc{flex-wrap:wrap;gap:8px;margin:26px 0 10px;display:flex}.tu-toc a{border:1px solid var(--line);color:var(--text);background:var(--panel);border-radius:999px;padding:7px 14px;font-size:13px;font-weight:550;text-decoration:none}.tu-toc a:hover{border-color:var(--accent)}.tu-app-head{flex-wrap:wrap;align-items:baseline;gap:14px;display:flex}.tu-app-head h1{font-size:clamp(26px,4vw,36px)}.tu-open{color:var(--accent,#aeb7c2);border:1px solid var(--line);border-radius:999px;padding:5px 13px;font-size:13px;font-weight:600;text-decoration:none}.tu-open:hover{border-color:var(--accent)}.tu-lede{max-width:720px;color:var(--muted);margin:12px 0 0;font-size:16px}.tu-section{margin-top:58px;scroll-margin-top:24px}.tu-section>h2{border-bottom:1px solid var(--line);padding-bottom:10px;font-size:24px}.tu-step{margin-top:34px;scroll-margin-top:24px}.tu-step-head{align-items:baseline;gap:12px;display:flex}.tu-num{width:26px;height:26px;color:var(--on-accent,#0f1318);background:var(--accent,#aeb7c2);border-radius:8px;flex:none;justify-content:center;align-items:center;font-size:13px;font-weight:650;display:inline-flex;transform:translateY(4px)}.tu-step h3{font-size:17px}.tu-step p{max-width:720px;color:var(--muted);margin:8px 0 14px 38px}.tu-step figure{margin:0 0 0 38px}.tu-step img,.tu-sub img{border:1px solid var(--line);background:#0b0c10;border-radius:12px;width:100%;height:auto;display:block}@media (max-width:640px){.tu-step p,.tu-step figure{margin-left:0}}.tu-sub{margin-top:34px;scroll-margin-top:24px}.tu-sub h3{font-size:17.5px}.tu-sub p,.tu-sub li{max-width:740px;color:var(--muted)}.tu-sub p{margin:8px 0 0}.tu-sub ul{margin:8px 0 0;padding-left:22px}.tu-sub li{margin:4px 0}.tu-sub li b,.tu-sub p b{color:var(--text);font-weight:600}.tu-sub figure{margin:14px 0 0}.tu-next{border-top:1px solid var(--line);flex-wrap:wrap;justify-content:space-between;gap:12px;margin-top:70px;padding-top:20px;font-size:14px;display:flex}.tu-next a{font-weight:600;text-decoration:none}.tu-next a:hover{text-decoration:underline}.tu-next span{color:var(--muted)}.tu-foot{border-top:1px solid var(--line);color:var(--muted);margin-top:60px;padding-top:22px;font-size:13px}