:root{--c-primary:#4f46e5;--c-primary-600:#4338ca;--c-primary-700:#3730a3;--c-primary-50:#eef2ff;--c-primary-100:#e0e7ff;--c-primary-200:#c7d2fe;--c-primary-ring:#4f46e52e;--c-heat:#ea580c;--c-heat-dark:#9a3412;--c-heat-bg:#fff7ed;--c-heat-border:#fed7aa;--c-cool:#0284c7;--c-cool-dark:#1e3a8a;--c-cool-bg:#eff6ff;--c-cool-border:#bfdbfe;--c-good:#10b981;--c-good-dark:#047857;--c-good-bg:#ecfdf5;--c-warn:#d97706;--c-warn-bg:#fffbeb;--c-bad:#dc2626;--c-bad-bg:#fee2e2;--c-text:#111827;--c-text-2:#374151;--c-muted:#6b7280;--c-faint:#9ca3af;--c-border:#e5e7eb;--c-border-soft:#f3f4f6;--c-surface:#fff;--c-surface-2:#f9fafb;--c-bg:#f6f7fb;--r-sm:6px;--r-md:8px;--r-lg:12px;--r-xl:16px;--shadow-xs:0 1px 2px #1118270a;--shadow-sm:0 1px 3px #1118270f, 0 1px 2px #11182708;--shadow-md:0 6px 18px #11182714;--shadow-lg:0 16px 40px #11182724;--font:"Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--ease:cubic-bezier(.2, .7, .2, 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#ffffff1f}.tx-btn--primary:not(:disabled):hover{background:var(--c-primary-600);filter:none}.tx-btn--secondary{background:var(--c-surface);border-color:var(--c-border);color:var(--c-text-2);font-weight:500}.tx-btn--secondary:not(:disabled):hover{background:var(--c-surface-2);filter:none;border-color:#d1d5db}.tx-btn--soft{background:var(--c-primary-50);border-color:var(--c-primary-200);color:var(--c-primary-600)}.tx-btn--success{background:var(--c-good);color:#fff}.tx-btn--success-soft{background:var(--c-good-bg);color:var(--c-good-dark);border-color:#a7f3d0}.tx-btn--ghost{color:var(--c-muted);font-weight:500}.tx-btn--ghost:not(:disabled):hover{background:var(--c-border-soft);color:var(--c-text);filter:none}.tx-btn--danger{background:var(--c-bad);color:#fff}.tx-hover-lift{transition:box-shadow .2s var(--ease), transform .2s var(--ease), border-color .2s}.tx-hover-lift:hover{box-shadow:var(--shadow-md);transform:translateY(-1px);border-color:var(--c-primary-200)!important}.tx-choice{text-align:center;border-radius:var(--r-lg);border:1.5px solid var(--c-border);background:var(--c-surface);cursor:pointer;color:var(--c-text-2);transition:border-color .15s, background-color .15s, box-shadow .2s var(--ease), transform .15s var(--ease);flex-direction:column;align-items:center;gap:8px;padding:14px 10px 12px;font-size:13px;font-weight:600;display:flex;position:relative}.tx-choice:not(:disabled):hover{border-color:var(--c-primary-200);box-shadow:var(--shadow-sm);filter:none;transform:translateY(-1px)}.tx-choice[aria-pressed=true],.tx-choice[aria-checked=true]{border-color:var(--c-primary);background:var(--c-primary-50);color:var(--c-primary-700);box-shadow:0 0 0 3px var(--c-primary-ring)}.tx-choice__sub{color:var(--c-muted);font-size:11px;font-weight:400;line-height:1.35}.tx-choice__tick{background:var(--c-primary);color:#fff;border-radius:50%;justify-content:center;align-items:center;width:18px;height:18px;display:none;position:absolute;top:6px;right:6px}.tx-choice[aria-pressed=true] .tx-choice__tick,.tx-choice[aria-checked=true] .tx-choice__tick{display:flex}@keyframes tx-step-in{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}@keyframes tx-pop-in{0%{opacity:0;transform:translateY(4px)scale(.98)}to{opacity:1;transform:none}}@keyframes tx-toast-in{0%{opacity:0;transform:translate(-50%,12px)}to{opacity:1;transform:translate(-50%)}}@keyframes tx-pulse{0%{box-shadow:0 0 0 0 var(--c-primary-ring)}to{box-shadow:0 0 0 10px #4f46e500}}.tx-step-in{animation:tx-step-in .28s var(--ease) both}.tx-pop-in{animation:tx-pop-in .18s var(--ease) both}@keyframes tx-spin{to{transform:rotate(360deg)}}.tx-spinner{border:2px solid 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.wrap{align-items:center;gap:20px;height:60px;display:flex}.brand{color:var(--c-text);letter-spacing:-.01em;align-items:center;gap:10px;font-size:17px;font-weight:700;text-decoration:none;display:flex}.brand img{border-radius:8px;width:32px;height:32px}.nav{align-items:center;gap:18px;margin-left:auto;font-size:14px;display:flex}.nav a{color:var(--c-text-2);font-weight:500;text-decoration:none}.nav a:hover{color:var(--c-primary)}.nav .lang{border:1px solid var(--c-border);border-radius:var(--r-sm);padding:3px 8px;font-size:13px}@media (width<=720px){.nav .section-link{display:none}}.btn{border-radius:var(--r-md);height:44px;font:600 15px var(--font);cursor:pointer;border:1px solid #0000;justify-content:center;align-items:center;gap:8px;padding:0 20px;text-decoration:none;transition:background-color .15s,box-shadow 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32px;font-size:16.5px}.grid{grid-template-columns:repeat(3,1fr);gap:16px;display:grid}.card{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-lg);box-shadow:var(--shadow-xs);padding:20px}.card h3{letter-spacing:-.01em;margin:0 0 6px;font-size:16.5px}.card p{color:var(--c-text-2);margin:0;font-size:14.5px}.card .tag{border-radius:var(--r-sm);margin-bottom:10px;padding:2px 8px;font-size:12px;font-weight:600;display:inline-block}.tag.heat{color:var(--c-heat-dark);background:var(--c-heat-bg)}.tag.cool{color:var(--c-cool-dark);background:var(--c-cool-bg)}.tag.good{color:var(--c-good-dark);background:var(--c-good-bg)}.tag.primary{color:var(--c-primary-700);background:var(--c-primary-50)}@media (width<=900px){.grid{grid-template-columns:1fr 1fr}}@media (width<=600px){.grid{grid-template-columns:1fr}section{padding:44px 0}}.split{grid-template-columns:1fr 1fr;align-items:center;gap:40px;display:grid}.split ul{color:var(--c-text-2);margin:0;padding-left:20px}.split li{margin-bottom:8px}@media (width<=900px){.split{grid-template-columns:1fr}}.levels .card{position:relative}.levels .min{color:var(--c-muted);font-size:13px;position:absolute;top:20px;right:20px}.methods{grid-template-columns:repeat(2,1fr);gap:12px 32px;margin:0;display:grid}.methods div{border-top:1px solid var(--c-border);padding:14px 0}.methods dt{font-size:15px;font-weight:650}.methods dd{color:var(--c-text-2);margin:4px 0 0;font-size:14.5px}@media (width<=700px){.methods{grid-template-columns:1fr}}.note{background:var(--c-warn-bg);border-radius:var(--r-lg);color:var(--c-text-2);border:1px solid #fde68a;margin-top:28px;padding:16px 18px;font-size:14.5px}.note b{color:var(--c-text)}.request{max-width:640px;margin:0 auto}.request form{grid-template-columns:1fr 1fr;gap:14px;display:grid}.request label{color:var(--c-text-2);flex-direction:column;gap:5px;font-size:13px;font-weight:600;display:flex}.request .full{grid-column:1/-1}.request input,.request select,.request textarea{font:15px var(--font);border:1px solid var(--c-border);border-radius:var(--r-md);background:var(--c-surface);color:var(--c-text);padding:10px 12px}.request textarea{resize:vertical;min-height:90px}.request .hp{width:1px;height:1px;position:absolute;left:-10000px;overflow:hidden}#request-status{grid-column:1/-1;min-height:1.5em;margin:0;font-size:14.5px}#request-status[data-kind=ok]{color:var(--c-good-dark)}#request-status[data-kind=error]{color:var(--c-bad)}.signin-line{text-align:center;color:var(--c-muted);margin-top:18px;font-size:14px}@media (width<=600px){.request form{grid-template-columns:1fr}}.faq{max-width:760px}.faq details{border-bottom:1px solid var(--c-border);padding:14px 0}.faq summary{cursor:pointer;font-size:16px;font-weight:600}.faq details p{color:var(--c-text-2);margin:10px 0 0}footer{border-top:1px solid var(--c-border-soft);color:var(--c-faint);padding:24px 0 32px;font-size:13px}footer .wrap{flex-wrap:wrap;align-items:center;gap:8px 18px;display:flex}footer a{color:var(--c-muted)}