:root{--bg:#fff;--bg-2:#f5f7fa;--ink:#0a1222;--ink-2:#485365;--muted:#626d80;--line:#e3e8ef;--line-2:#edf1f6;--blue:#0060de;--blue-2:#004fb8;--blue-soft:#e8f0fc;--cyan:#00b3ea;--ok:#0f9f6e;--ok-soft:#e7f6ef;--ok-ink:#0b7a54;--water:#edf2f8;--land:#fff;--dot:#d3dbe6;--road:#d6dde7;--river:#c9ddf1;--boundary:#c2cbd8;--sar:#7b8ba3;--f-sans:"Geist", -apple-system, "PingFang HK", "Noto Sans TC", "Microsoft JhengHei", sans-serif;--f-mono:"Geist Mono", ui-monospace, "SFMono-Regular", Consolas, monospace;--wrap:1240px;--gutter:clamp(16px, 4vw, 40px);--r:16px;--shadow:0 1px 2px #0a12220a, 0 12px 32px -12px #0a122224}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--bg);color:var(--ink);font:400 16px/1.7 var(--f-sans);-webkit-font-smoothing:antialiased;font-feature-settings:"tnum" 1;margin:0;overflow-x:hidden}html[lang^=zh] body{font-size:16.5px;line-height:1.8}img{max-width:100%;height:auto;display:block}a{color:inherit}:focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:6px}h1,h2,h3{letter-spacing:-.01em;text-wrap:balance;margin:0;font-weight:700;line-height:1.25}html[lang^=zh] h1,html[lang^=zh] h2,html[lang^=zh] h3{letter-spacing:.01em}p{margin:0}.wrap{width:min(var(--wrap), 100% - var(--gutter) * 2);margin-inline:auto}.mono{font-family:var(--f-mono);letter-spacing:0}.kicker{font:500 12.5px/1 var(--f-mono);color:var(--blue);letter-spacing:.02em;align-items:center;gap:8px;display:inline-flex}.kicker:before{content:"";width:6px;height:6px;box-shadow:0 0 0 3px var(--blue-soft);background:currentColor;border-radius:50%}.btn{height:48px;font:600 15.5px/1 var(--f-sans);white-space:nowrap;cursor:pointer;border:1px solid #0000;border-radius:999px;justify-content:center;align-items:center;gap:10px;padding:0 22px;text-decoration:none;transition:background .2s,color .2s,border-color .2s,transform .15s;display:inline-flex}.btn:active{transform:translateY(1px)}.btn svg{flex:none;width:18px;height:18px}.btn-blue{background:var(--blue);color:#fff}.btn-blue:hover{background:var(--blue-2)}.btn-line{border-color:var(--line);background:var(--bg);color:var(--ink)}.btn-line:hover{border-color:var(--ink-2)}.section{padding-block:clamp(72px,9vw,120px)}.ph+.section{padding-top:clamp(40px,5vw,64px)}.section-head{gap:12px;max-width:720px;margin-bottom:clamp(32px,4vw,48px);display:grid}.section-head h2{font-size:clamp(30px,3.4vw,44px)}.section-head p{color:var(--ink-2);font-size:17.5px}.alt{background:var(--bg-2)}.card{background:var(--bg);border:1px solid var(--line);border-radius:var(--r)}.chip{font:500 12px/1 var(--f-mono);color:var(--ink-2);background:var(--bg-2);border:1px solid var(--line);border-radius:999px;align-items:center;gap:6px;padding:6px 10px;display:inline-flex}.num{font-family:var(--f-mono);font-variant-numeric:tabular-nums;letter-spacing:0}.tbl-wrap{-webkit-overflow-scrolling:touch;border:1px solid var(--line);border-radius:var(--r);background:var(--bg);overflow-x:auto}.tbl{border-collapse:collapse;width:100%;font-size:14.5px;line-height:1.55}.tbl th{font:500 11.5px/1.3 var(--f-mono);color:var(--muted);text-align:left;background:var(--bg-2);border-bottom:1px solid var(--line);white-space:nowrap;padding:12px 16px}.tbl td{border-top:1px solid var(--line-2);vertical-align:top;padding:14px 16px}.tbl tr:first-child td{border-top:0}.tbl td.num,.tbl th.num{text-align:right;white-space:nowrap}.tbl a{color:var(--blue);font-weight:600;text-decoration:none}.tbl a:hover{text-underline-offset:3px;text-decoration:underline}.prose{max-width:720px}.prose>*+*{margin-top:14px}.prose h2{margin-top:52px;font-size:clamp(22px,2.4vw,28px)}.prose h3{margin-top:30px;font-size:18px}.prose p,.prose li{color:var(--ink-2)}.prose .lead{color:var(--ink);font-size:18.5px;line-height:1.75}.prose ul,.prose ol{gap:8px;padding-left:1.25em;display:grid}.prose li::marker{color:var(--blue)}.prose a:not(.btn){color:var(--blue);text-underline-offset:3px}.prose .tbl-wrap{margin-top:18px}.ticks{gap:8px;margin:0;padding:0;font-size:15px;list-style:none;display:grid}.ticks li{align-items:baseline;gap:10px;display:flex}.ticks li:before{content:"✓";color:var(--ok);flex:none;font-weight:700}.ticks.plus li:before{content:"+";color:var(--muted)}@media (prefers-reduced-motion:reduce){*,:before,:after{transition-duration:.001ms!important;animation-duration:.001ms!important;animation-iteration-count:1!important}}.th[data-astro-cid-w3spnsuf]{z-index:50;-webkit-backdrop-filter:saturate(1.6)blur(14px);border-bottom:1px solid var(--line);background:#ffffffdb;position:sticky;top:0}.th-in[data-astro-cid-w3spnsuf]{align-items:center;gap:36px;height:66px;display:flex}.logo[data-astro-cid-w3spnsuf]{flex:none;align-items:center;gap:12px;text-decoration:none;display:flex}.logo-img[data-astro-cid-w3spnsuf]{width:auto;height:28px;display:block}.logo-zh[data-astro-cid-w3spnsuf]{color:var(--ink-2);border-left:1px solid var(--line);padding-left:12px;font-size:12.5px}.th-nav[data-astro-cid-w3spnsuf]{gap:6px;display:flex}.th-nav[data-astro-cid-w3spnsuf] a[data-astro-cid-w3spnsuf]{color:var(--ink-2);border-radius:999px;padding:7px 12px;font-size:15px;font-weight:500;text-decoration:none;transition:background .2s,color .2s}.th-nav[data-astro-cid-w3spnsuf] a[data-astro-cid-w3spnsuf]:hover,.th-nav[data-astro-cid-w3spnsuf] a[data-astro-cid-w3spnsuf][aria-current]{color:var(--ink);background:var(--bg-2)}.th-act[data-astro-cid-w3spnsuf]{align-items:center;gap:12px;margin-left:auto;display:flex}.seg[data-astro-cid-w3spnsuf]{background:var(--bg-2);border-radius:999px;padding:3px;display:inline-flex}.seg[data-astro-cid-w3spnsuf] a[data-astro-cid-w3spnsuf]{font:600 13px/1 var(--f-sans);color:var(--ink-2);border-radius:999px;padding:7px 11px;text-decoration:none}.seg[data-astro-cid-w3spnsuf] a[data-astro-cid-w3spnsuf].on{background:var(--bg);color:var(--ink);box-shadow:0 1px 3px #0a12221a}.th-cta[data-astro-cid-w3spnsuf]{height:40px;padding:0 18px;font-size:14.5px}.th-menu[data-astro-cid-w3spnsuf]{display:none;position:relative}.th-menu[data-astro-cid-w3spnsuf] summary[data-astro-cid-w3spnsuf]{cursor:pointer;border-radius:999px;place-content:center;gap:6px;width:40px;height:40px;list-style:none;display:grid}.th-menu[data-astro-cid-w3spnsuf] summary[data-astro-cid-w3spnsuf]::-webkit-details-marker{display:none}.th-menu[data-astro-cid-w3spnsuf] summary[data-astro-cid-w3spnsuf] span[data-astro-cid-w3spnsuf]{background:var(--ink);border-radius:2px;width:20px;height:1.8px;transition:transform .2s;display:block}.th-menu[data-astro-cid-w3spnsuf][open] summary[data-astro-cid-w3spnsuf] span[data-astro-cid-w3spnsuf]:first-child{transform:translateY(3.9px)rotate(45deg)}.th-menu[data-astro-cid-w3spnsuf][open] summary[data-astro-cid-w3spnsuf] span[data-astro-cid-w3spnsuf]:last-child{transform:translateY(-3.9px)rotate(-45deg)}.th-panel[data-astro-cid-w3spnsuf]{background:var(--bg);border-bottom:1px solid var(--line);box-shadow:var(--shadow);padding:8px var(--gutter) 20px;display:grid;position:fixed;top:66px;left:0;right:0}.th-panel[data-astro-cid-w3spnsuf] a[data-astro-cid-w3spnsuf]{border-bottom:1px solid var(--line-2);padding:14px 2px;font-size:17px;font-weight:500;text-decoration:none}@media (width<=960px){.th-nav[data-astro-cid-w3spnsuf]{display:none}.th-menu[data-astro-cid-w3spnsuf]{display:block}.logo-zh[data-astro-cid-w3spnsuf]{display:none}}@media (width<=520px){.th-in[data-astro-cid-w3spnsuf]{gap:12px;height:60px}.th-panel[data-astro-cid-w3spnsuf]{top:60px}.th-cta[data-astro-cid-w3spnsuf]{display:none}}.tf[data-astro-cid-lsreyofm]{background:var(--bg-2);border-top:1px solid var(--line);padding:64px 0 28px}.tf-grid[data-astro-cid-lsreyofm]{grid-template-columns:1.4fr .7fr .7fr 1.2fr;gap:40px;display:grid}.tf-word[data-astro-cid-lsreyofm]{align-items:center;gap:12px;display:flex}.tf-word[data-astro-cid-lsreyofm] img[data-astro-cid-lsreyofm]{width:auto;height:34px;display:block}.tf-word[data-astro-cid-lsreyofm] span[data-astro-cid-lsreyofm]{color:var(--ink-2);border-left:1px solid var(--line);padding-left:12px;font-size:15px;font-weight:500}.tf-tag[data-astro-cid-lsreyofm]{color:var(--ink-2);max-width:34ch;margin-top:8px}.tf-contact[data-astro-cid-lsreyofm]{gap:6px;margin:22px 0 0;font-size:13px;display:grid}.tf-contact[data-astro-cid-lsreyofm] div[data-astro-cid-lsreyofm]{grid-template-columns:84px 1fr;display:grid}.tf-contact[data-astro-cid-lsreyofm] dt[data-astro-cid-lsreyofm]{color:var(--muted)}.tf-contact[data-astro-cid-lsreyofm] dd[data-astro-cid-lsreyofm]{margin:0}.tf-night[data-astro-cid-lsreyofm]{color:var(--muted);margin-top:2px;display:block}.tf-h[data-astro-cid-lsreyofm]{font:500 12px var(--f-mono);color:var(--muted);letter-spacing:.02em;margin-bottom:12px}.tf[data-astro-cid-lsreyofm] ul[data-astro-cid-lsreyofm]{gap:7px;margin:0;padding:0;list-style:none;display:grid}.tf[data-astro-cid-lsreyofm] li[data-astro-cid-lsreyofm] a[data-astro-cid-lsreyofm]{color:var(--ink-2);font-size:15px;text-decoration:none}.tf[data-astro-cid-lsreyofm] li[data-astro-cid-lsreyofm] a[data-astro-cid-lsreyofm]:hover{color:var(--blue)}.tf-base[data-astro-cid-lsreyofm]{border-top:1px solid var(--line);color:var(--muted);flex-wrap:wrap;justify-content:space-between;gap:8px 24px;margin-top:48px;padding-top:20px;font-size:11.5px;display:flex}@media (width<=760px){.tf[data-astro-cid-lsreyofm]{padding-bottom:calc(28px + 84px + env(safe-area-inset-bottom,0px))}}@media (width<=960px){.tf-grid[data-astro-cid-lsreyofm]{grid-template-columns:repeat(3,minmax(0,1fr))}.tf-brand[data-astro-cid-lsreyofm]{grid-column:1/-1}}@media (width<=560px){.tf-grid[data-astro-cid-lsreyofm]{grid-template-columns:1fr 1fr;gap:32px 20px}.tf-grid[data-astro-cid-lsreyofm]>nav[data-astro-cid-lsreyofm]:last-child{grid-column:1/-1}}.mb[data-astro-cid-v3ixspr5]{display:none}@media (width<=760px){.mb[data-astro-cid-v3ixspr5]{left:10px;right:10px;bottom:calc(10px + env(safe-area-inset-bottom,0px));z-index:40;color:#fff;background:#0a1222f0;border-radius:999px;align-items:center;gap:12px;padding:8px 8px 8px 18px;transition:transform .3s,opacity .3s;display:flex;position:fixed;box-shadow:0 14px 34px -10px #0a122280}.mb[data-astro-cid-v3ixspr5][data-off]{opacity:0;pointer-events:none;transform:translateY(140%)}.mb-p[data-astro-cid-v3ixspr5]{font-size:13px;line-height:1.2}.mb-p[data-astro-cid-v3ixspr5] b[data-astro-cid-v3ixspr5]{font-size:18px}.mb-p[data-astro-cid-v3ixspr5]{min-width:0}.mb-p[data-astro-cid-v3ixspr5] small[data-astro-cid-v3ixspr5]{color:#a9b3c3;white-space:nowrap;text-overflow:ellipsis;font-size:11.5px;display:block;overflow:hidden}.mb[data-astro-cid-v3ixspr5] .btn[data-astro-cid-v3ixspr5]{height:44px;margin-left:auto;padding:0 18px;font-size:14.5px}}