:root{--bg:#f4f8fc;--bg-2:#eaf2fa;--surface:#fff;--ink:#142238;--ink-2:#3d4b5f;--ink-3:#6f7b8c;--heading:#0b2b57;--line:#dde8f2;--brand:#0f6fd6;--brand-deep:#0b57b0;--brand-soft:#e9f4ff;--brand-glow:#168bff38;--teal:#19c7be;--teal-ink:#0b8c86;--teal-soft:#e4f9f7;--green:#76d54e;--shadow:0 1px 2px #0b2b570d, 0 12px 32px -12px #0b2b572e;--grad:linear-gradient(90deg, #168bff, #19c7be 60%, #76d54e);--radius:16px;--radius-sm:10px;--serif:"Inter", "Noto Sans TC", -apple-system, "PingFang TC", "Microsoft JhengHei", sans-serif;--sans:"Inter", "Noto Sans TC", -apple-system, "PingFang TC", "Microsoft JhengHei", sans-serif;--mono:"Inter", ui-monospace, monospace;--wrap:1280px;color-scheme:light}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}body{background:var(--bg);color:var(--ink);font-family:var(--sans);letter-spacing:.01em;margin:0;font-size:17px;line-height:1.75;overflow-x:hidden}img{max-width:100%;height:auto;display:block}a{color:var(--brand-deep);text-underline-offset:3px}h1,h2,h3{letter-spacing:.02em;margin:0 0 .5em;line-height:1.3}h1,h2{font-family:var(--serif);color:var(--heading);letter-spacing:.01em;font-weight:700}h1{font-size:clamp(1.75rem,5.2vw,3.6rem)}h2{font-size:clamp(1.6rem,3.4vw,2.4rem)}h3{font-size:1.15rem;font-weight:600}p{margin:0 0 1em}.wrap{max-width:var(--wrap);margin:0 auto;padding:0 16px}@media (width>=720px){.wrap{padding:0 32px}}.section{padding:88px 0}.section.tight{padding:40px 0}.section.alt{background:var(--bg-2)}.eyebrow{letter-spacing:.12em;color:var(--brand);margin-bottom:14px;font-size:.85rem;font-weight:700}.eyebrow:before{content:"";background:var(--grad);border-radius:99px;width:44px;height:5px;margin-bottom:12px;display:block}.center .eyebrow:before,.center.eyebrow:before{margin-left:auto;margin-right:auto}.lead{color:var(--ink-2);max-width:40em;font-size:1.12rem}.muted{color:var(--ink-3)}.center{text-align:center}.center .lead{margin-left:auto;margin-right:auto}.btn{cursor:pointer;border:1px solid #0000;border-radius:999px;align-items:center;gap:8px;padding:13px 22px;font-family:inherit;font-size:1rem;font-weight:600;text-decoration:none;transition:transform .2s,box-shadow .2s,background .2s;display:inline-flex}.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 24px -8px var(--brand-glow)}.btn-primary:hover{box-shadow:0 12px 28px -8px var(--brand-glow);transform:translateY(-1px)}.btn-ghost{color:var(--ink);border-color:var(--line);background:0 0}.btn-ghost:hover{border-color:var(--brand);color:var(--brand-deep)}.btn-row{flex-wrap:wrap;gap:12px;display:flex}.grid{gap:16px;display:grid}@media (width>=720px){.grid.c2{grid-template-columns:repeat(2,1fr)}.grid.c3{grid-template-columns:repeat(3,1fr)}.grid.c4{grid-template-columns:repeat(4,1fr)}}@media (width>=720px) and (width<=979px){.grid.c4{grid-template-columns:repeat(2,1fr)}}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px}.card h3{margin-bottom:.35em}.card p{color:var(--ink-2);margin:0;font-size:.97rem}.tag{background:var(--brand-soft);color:var(--brand-deep);border-radius:999px;padding:3px 10px;font-size:.75rem;font-weight:600;display:inline-block}.nav{z-index:50;max-width:calc(var(--wrap) - 32px);background:color-mix(in srgb, var(--surface) 72%, transparent);border:1px solid color-mix(in srgb, var(--line) 80%, transparent);-webkit-backdrop-filter:saturate(1.4)blur(14px);border-radius:999px;justify-content:space-between;align-items:center;gap:12px;width:calc(100% - 24px);margin:12px auto 0;padding:8px 8px 8px 20px;display:flex;position:sticky;top:12px;box-shadow:0 6px 24px -14px #00000040}.logo{color:var(--ink);white-space:nowrap;align-items:center;gap:8px;font-weight:700;text-decoration:none;display:flex}.logo img{width:30px;height:30px}.logo b{letter-spacing:-.01em;color:var(--heading);font-size:1.2rem}.logo small{color:var(--ink-3);font-size:.82rem;font-weight:500}.nav-links{gap:4px;display:none}.nav-links a{color:var(--ink-2);border-radius:999px;padding:8px 14px;font-size:.95rem;text-decoration:none}.nav-links a:hover,.nav-links a[aria-current=page]{background:var(--brand-soft);color:var(--brand-deep)}.nav .btn{padding:9px 18px;font-size:.92rem}.nav-menu{display:inline-flex}@media (width>=900px){.nav-links{display:flex}.nav-menu{display:none}}.menu-btn{border:1px solid var(--line);width:40px;height:40px;color:var(--ink);cursor:pointer;background:0 0;border-radius:999px;font-size:1.1rem}.mobile-menu{z-index:49;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:10px;display:none;position:fixed;inset:76px 12px auto}.mobile-menu.open{display:grid}.mobile-menu a{color:var(--ink);border-radius:10px;padding:12px 14px;text-decoration:none}.mobile-menu a:hover{background:var(--brand-soft)}.footer{border-top:1px solid var(--line);color:var(--ink-3);padding:48px 0 40px;font-size:.92rem}.footer-grid{gap:24px;display:grid}@media (width>=720px){.footer-grid{grid-template-columns:2fr 1fr 1fr}}.footer a{color:var(--ink-2);padding:3px 0;text-decoration:none;display:block}.footer a:hover{color:var(--brand-deep)}.page-head{padding:64px 0 16px}.page-head h1{font-size:clamp(1.9rem,4.4vw,3rem)}.updated{color:var(--ink-3);font-size:.85rem;font-family:var(--mono)}.answer{background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:var(--radius-sm);color:var(--ink);padding:20px 24px;font-size:1.05rem}.table-wrap{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);overflow-x:auto}table{border-collapse:collapse;width:100%;min-width:560px;font-size:.95rem}th,td{text-align:left;border-bottom:1px solid var(--line);vertical-align:top;padding:14px 18px}th{background:var(--bg-2);font-weight:600}tr:last-child td{border-bottom:0}.faq details{border-bottom:1px solid var(--line);padding:18px 0}.faq summary{cursor:pointer;justify-content:space-between;gap:16px;font-size:1.05rem;font-weight:600;list-style:none;display:flex}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:"+";color:var(--brand);font-size:1.4rem;line-height:1;transition:transform .2s}.faq details[open] summary:after{transform:rotate(45deg)}.faq details p{color:var(--ink-2);margin:12px 0 0}.js .reveal{opacity:0;filter:blur(6px);transition:opacity .8s,transform .8s,filter .8s;transform:translateY(18px)}.js .reveal.in{opacity:1;filter:none;transform:none}@media (prefers-reduced-motion:reduce){.js .reveal{opacity:1;filter:none;transition:none;transform:none}html{scroll-behavior:auto}}.sr-only{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.skip{position:absolute;top:8px;left:-999px}.skip:focus{z-index:100;background:var(--surface);border-radius:8px;padding:8px 14px;left:16px}:focus-visible{outline:2px solid var(--brand);outline-offset:3px}