:root{color-scheme:dark;--bg:#03182b;--surface:#0d2b47;--soft:#123553;--line:#245678;--text:#f7fbff;--muted:#afc2d4;--blue:#20a9ff;--cyan:#37d8ff;--green:#32df8f}*{box-sizing:border-box}html{background:var(--bg);scroll-behavior:smooth}body{margin:0;background:radial-gradient(circle at 85% 0,#0a4974 0,transparent 32%),var(--bg);color:var(--text);font-family:ui-rounded,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.55}.help-header{position:sticky;top:0;z-index:5;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:calc(14px + env(safe-area-inset-top)) max(18px,env(safe-area-inset-right)) 14px max(18px,env(safe-area-inset-left));background:#0d2b47f2;border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}.brand{display:flex;align-items:center;gap:11px;font-size:1.2rem;font-weight:900}.brand img{width:42px;height:42px;border-radius:12px}.back{min-height:44px;padding:10px 15px;border:1px solid #2b719e;border-radius:13px;color:var(--text);font-weight:800;text-decoration:none;background:#103755}.wrap{width:min(820px,100%);margin:auto;padding:30px 18px calc(46px + env(safe-area-inset-bottom))}.hero{padding:25px;border:1px solid var(--line);border-radius:24px;background:linear-gradient(145deg,#103b5e,#09243e)}h1{margin:0;font-size:clamp(2rem,8vw,3.4rem);line-height:1.02}h1 span,h2 span{color:var(--blue)}.lead{margin:13px 0 0;color:var(--muted);font-size:1.05rem}.toc,.card{margin-top:18px;padding:20px;border:1px solid var(--line);border-radius:20px;background:var(--surface);scroll-margin-top:88px}.toc h2,.card h2{margin-top:0}.toc-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}.toc a{padding:11px 12px;border-radius:12px;background:var(--soft);color:#d9f2ff;text-decoration:none;font-weight:750}.card p,.card li{color:#d4e1ec}.card strong{color:#fff}.steps{counter-reset:step;display:grid;gap:12px;padding:0;list-style:none}.steps li{position:relative;padding:14px 14px 14px 56px;border-radius:14px;background:var(--soft)}.steps li::before{counter-increment:step;content:counter(step);position:absolute;left:14px;top:13px;display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:linear-gradient(135deg,var(--cyan),#078dff);color:#00172a;font-weight:950}.tip{padding:13px 15px;border-left:4px solid var(--green);border-radius:10px;background:#0b3a3b;color:#dfffee}.faq-list{display:grid;gap:11px}.faq-list details{border:1px solid var(--line);border-radius:15px;background:var(--surface);overflow:hidden}.faq-list summary{cursor:pointer;padding:16px;font-weight:850}.faq-list details p{margin:0;padding:0 16px 17px;color:#d4e1ec}.footer-note{margin-top:22px;text-align:center;color:var(--muted)}@media(max-width:520px){.help-header{padding-inline:12px}.brand span{display:none}.wrap{padding:20px 13px 36px}.hero,.card,.toc{padding:17px;border-radius:18px}.toc-grid{grid-template-columns:1fr}h1{font-size:2.25rem}}