.zRdnva_phrases{word-break:keep-all;line-break:strict;overflow-wrap:anywhere}.zRdnva_clause{vertical-align:top;max-width:100%;display:inline-block}.zRdnva_pinch{margin-inline-end:-.5em}.zRdnva_nowrap,.zRdnva_pair{white-space:nowrap}@media (max-width:767px){.zRdnva_pair{white-space:normal;max-width:100%;display:inline-block}}
._44YX2G_breadcrumbs ol{color:var(--slate-soft);flex-wrap:wrap;align-items:center;gap:2px 0;margin:0;padding:0;font-size:14px;list-style:none;display:flex}._44YX2G_breadcrumbs li{align-items:center;display:inline-flex}._44YX2G_breadcrumbs li+li:before{content:"";border-top:1.5px solid #9aa6b9;border-right:1.5px solid #9aa6b9;width:6px;height:6px;margin:0 10px;transform:rotate(45deg)}._44YX2G_breadcrumbs a{min-width:32px;min-height:32px;color:var(--slate);font-weight:var(--w-semi);justify-content:center;align-items:center;text-decoration:none;display:inline-flex}._44YX2G_breadcrumbs a:hover{color:var(--cobalt)}._44YX2G_breadcrumbs [aria-current=page]{color:var(--ink);font-weight:var(--w-semi)}._44YX2G_home svg{width:17px;height:17px}@media (max-width:599px){._44YX2G_breadcrumbs ol{font-size:13px}}
._8RiFmG_button{border-radius:var(--r-pill);min-height:50px;font:inherit;font-size:var(--fs-button);font-weight:var(--w-bold);white-space:nowrap;cursor:pointer;transition:background-color var(--t-fast), color var(--t-fast), border-color var(--t-fast), box-shadow var(--t-ui), transform var(--t-ui) var(--ease-out);border:1.5px solid #0000;justify-content:center;align-items:center;gap:10px;padding:0 24px;line-height:1.1;text-decoration:none;display:inline-flex}._8RiFmG_button:active{transform:translateY(1px)}svg._8RiFmG_icon{width:18px;height:18px;transition:transform var(--t-ui) var(--ease-out);font-size:18px}._8RiFmG_button:hover ._8RiFmG_icon{transform:translate(3px)}._8RiFmG_label{display:inline}._8RiFmG_sm{min-height:44px;padding:0 18px;font-size:15px}._8RiFmG_md{min-height:50px}._8RiFmG_lg{min-height:56px;padding:0 28px;font-size:16px}._8RiFmG_primary{background:var(--cobalt);color:#fff;box-shadow:var(--shadow-cobalt)}._8RiFmG_primary:hover,._8RiFmG_primary:active{background:var(--cobalt-deep);color:#fff;box-shadow:0 16px 32px -12px #1f4fe099}._8RiFmG_secondary{color:var(--ink);border-color:var(--line-strong);background:#fff}._8RiFmG_secondary:hover{border-color:var(--ink);color:var(--ink)}._8RiFmG_on-dark{color:var(--ink);background:#fff;box-shadow:0 14px 30px -14px #0b142673}._8RiFmG_on-dark:hover{color:var(--cobalt)}._8RiFmG_on-dark:focus-visible{outline-color:#fff}._8RiFmG_text{min-height:44px;box-shadow:none;color:var(--cobalt);font-size:var(--fs-small);font-weight:var(--w-bold);background:0 0;border:0;padding:0 12px;position:relative}._8RiFmG_text:before{content:"";border-radius:var(--r-pill);transition:background-color var(--t-fast);background:0 0;position:absolute;inset:4px 0}._8RiFmG_text:hover{color:var(--cobalt-deep)}._8RiFmG_text:hover:before{background:var(--ice)}._8RiFmG_text>*{position:relative}._8RiFmG_button[aria-disabled=true]:not([data-loading]){background:var(--mist);box-shadow:none;color:var(--slate-soft);cursor:not-allowed;border-color:#0000}._8RiFmG_button[data-loading]{cursor:progress}@media (forced-colors:active){html.js ._8RiFmG_button[data-waiting]:disabled{color:buttontext;border-color:buttontext}}._8RiFmG_stack{display:inline-grid}._8RiFmG_face{grid-area:1/1;justify-content:center;align-items:center;gap:10px;display:inline-flex}._8RiFmG_hiddenFace{visibility:hidden}@media (max-width:599px){._8RiFmG_fullWidthOnMobile{width:100%}}@media (max-width:359px){._8RiFmG_button{white-space:normal;text-align:center;max-width:100%;padding-block:8px}}
.crCQSa_phrase{max-width:100%;display:inline-block}.crCQSa_phrase:lang(zh){word-break:keep-all;line-break:strict;overflow-wrap:anywhere}.crCQSa_block{max-width:100%;display:inline-block}
.PSgtHq_display,.PSgtHq_h2{color:var(--ink);font-weight:var(--w-heavy);letter-spacing:var(--track-display);text-wrap:balance}.PSgtHq_display{font-size:var(--fs-display);line-height:var(--lh-display)}.PSgtHq_h2{font-size:var(--fs-h2);line-height:var(--lh-h2);letter-spacing:-.02em}.PSgtHq_display:lang(en),.PSgtHq_h2:lang(en){text-transform:uppercase}.PSgtHq_display:lang(zh){font-size:var(--fs-display-zh);line-height:var(--lh-display-zh);letter-spacing:var(--track-display-zh);font-weight:var(--w-heavy-zh)}.PSgtHq_h2:lang(zh){font-size:var(--fs-h2-zh);letter-spacing:.01em;line-height:1.25;font-weight:var(--w-heavy-zh)}.PSgtHq_h2Small{font-size:clamp(24px,.9vw + 17px,31px)}.PSgtHq_light{font-weight:var(--w-light)}.PSgtHq_light:lang(zh){font-weight:var(--w-light-zh)}.PSgtHq_stop{color:var(--cobalt);font-weight:var(--w-heavy);margin-left:-.035em}.PSgtHq_stop:lang(zh){font-weight:var(--w-heavy-zh);margin-left:0}.PSgtHq_onDark{color:#fff}.PSgtHq_onDark .PSgtHq_stop{color:#6d93ff}.PSgtHq_onCobalt{color:#fff}.PSgtHq_onCobalt .PSgtHq_stop{color:#bfd3ff}.PSgtHq_onCobalt .PSgtHq_light{color:#e3ebff}.PSgtHq_eyebrow{color:var(--cobalt);font-size:var(--fs-eyebrow);font-weight:var(--w-bold);letter-spacing:var(--track-eyebrow);text-transform:uppercase;align-items:center;gap:10px;margin:0 0 18px;line-height:1.3;display:flex}.PSgtHq_eyebrow:before{content:"";width:7px;height:7px;box-shadow:0 0 0 3px color-mix(in srgb, currentColor 18%, transparent);background:currentColor;border-radius:50%;flex:none}.PSgtHq_eyebrow:lang(zh){font-size:13px;font-weight:var(--w-semi)}.PSgtHq_eyebrowSky{color:var(--sky)}.PSgtHq_eyebrowOnCobalt{color:#fff;justify-content:center}.PSgtHq_lead{color:var(--slate);font-size:17.5px;line-height:1.65}.PSgtHq_lead:lang(zh){word-break:keep-all;overflow-wrap:anywhere;line-height:1.85}.PSgtHq_num{color:var(--cobalt);font-size:15px;font-weight:var(--w-bold);letter-spacing:.02em;font-variant-numeric:tabular-nums}.PSgtHq_more{min-height:44px;color:var(--cobalt);font-weight:var(--w-bold);padding-block:8.5px;line-height:1.6;text-decoration:none;display:inline-block}.PSgtHq_more:hover{color:var(--cobalt-deep)}.PSgtHq_more svg{vertical-align:-3px;width:18px;height:18px;transition:transform var(--t-ui) var(--ease-out);margin-left:8px}.PSgtHq_more:hover svg{transform:translate(4px)}.PSgtHq_moreSky{color:var(--sky)}.PSgtHq_moreSky:hover{color:#fff}.PSgtHq_tags,.PSgtHq_chips{flex-wrap:wrap;gap:8px;margin:0;padding:0;list-style:none;display:flex}.PSgtHq_tag{white-space:nowrap;border-radius:var(--r-pill);min-height:30px;color:var(--ink);font-size:13.5px;font-weight:var(--w-semi);background:#eff2f7;align-items:center;padding:4px 13px;line-height:1.2;display:inline-flex}.PSgtHq_chip{border-radius:var(--r-pill);background:var(--mist);min-height:32px;color:var(--ink);font-size:13.5px;font-weight:var(--w-semi);align-items:center;padding:4px 12px;line-height:1.2;display:inline-flex}.PSgtHq_points{color:var(--ink);font-size:14.5px;font-weight:var(--w-semi);gap:8px;margin:0;padding:0;list-style:none;display:grid}.PSgtHq_points li{grid-template-columns:16px minmax(0,1fr);align-items:start;gap:9px;line-height:1.45;display:grid}.PSgtHq_points svg{width:16px;height:16px;color:var(--cobalt);margin-top:2px}.PSgtHq_rich a{color:var(--cobalt);font-weight:var(--w-bold);text-underline-offset:3px;padding-block:3px;text-decoration:underline;text-decoration-thickness:1.5px}.PSgtHq_rich a:hover{color:var(--cobalt-deep);text-decoration-thickness:2.5px}@media (max-width:599px){.PSgtHq_h2:lang(en){font-size:clamp(21px,7.5vw - 3px,27px)}.PSgtHq_h2Small:lang(en){font-size:clamp(18.5px,7.5vw - 5.5px,24px)}}@media (max-width:359px){.PSgtHq_h2Small:lang(zh){font-size:22px}}
.ws9LzG_hero{isolation:isolate;background:var(--paper);border-bottom:1px solid var(--line);position:relative;overflow:clip}.ws9LzG_glow{z-index:-1;pointer-events:none;background:radial-gradient(520px 400px at 78% 48%,#4d7cff29,#4d7cff00 70%),radial-gradient(420px 300px at 10% 0,#4d7cff0f,#4d7cff00 70%);position:absolute;inset:0}.ws9LzG_in{padding-block:22px clamp(48px,4vw + 20px,88px)}.ws9LzG_grid{grid-template-columns:minmax(0,1.35fr) minmax(0,.65fr);align-items:center;gap:32px 56px;margin-top:clamp(28px,3vw,48px);display:grid}.ws9LzG_plain .ws9LzG_grid{grid-template-columns:minmax(0,1fr)}.ws9LzG_plain .ws9LzG_copy{max-width:820px}.ws9LzG_title{max-width:15em;color:var(--ink);font-size:var(--fs-h1-inner);font-weight:var(--w-heavy);letter-spacing:-.022em;text-wrap:balance;line-height:1.04}.ws9LzG_title:lang(en){text-transform:uppercase}.ws9LzG_title:lang(zh){font-size:var(--fs-h1-inner-zh);font-weight:var(--w-heavy-zh);letter-spacing:.01em;line-height:1.22}.ws9LzG_lede{max-width:36em;color:var(--slate);font-size:var(--fs-lead);text-wrap:pretty;margin-top:22px;line-height:1.6}.ws9LzG_lede:lang(zh){line-height:1.85}.ws9LzG_updated{color:var(--slate-soft);font-size:var(--fs-small);margin-top:14px}.ws9LzG_actions{flex-wrap:wrap;gap:12px;margin-top:30px;display:flex}.ws9LzG_facts{color:var(--slate);font-size:14.5px;font-weight:var(--w-semi);flex-wrap:wrap;gap:8px 24px;margin:20px 0 0;padding:0;list-style:none;display:flex}.ws9LzG_facts li{align-items:center;gap:8px;display:inline-flex}.ws9LzG_facts svg{width:16px;height:16px;color:var(--cobalt)}.ws9LzG_jump{flex-wrap:wrap;gap:8px;margin:26px 0 0;padding:0;list-style:none;display:flex}.ws9LzG_pill{border-radius:var(--r-pill);min-height:40px;box-shadow:0 0 0 1px var(--line-strong);color:var(--ink);font-size:14.5px;font-weight:var(--w-bold);transition:box-shadow var(--t-fast), color var(--t-fast);background:#fff;align-items:center;padding:0 16px;text-decoration:none;display:inline-flex}.ws9LzG_pill:hover{box-shadow:0 0 0 1.5px var(--cobalt);color:var(--cobalt)}.ws9LzG_art{aspect-ratio:1;justify-self:center;width:min(100%,360px);position:relative}.ws9LzG_orbit{fill:none;width:100%;height:100%;position:absolute;inset:0}.ws9LzG_orbit circle:not(.ws9LzG_node){stroke:#c9d6f2;stroke-width:1.2px;stroke-dasharray:2 7}.ws9LzG_node{fill:#9cb5f2}.ws9LzG_packet{fill:var(--signal)}.ws9LzG_object{width:66%;height:66%;animation:7.5s ease-in-out infinite ws9LzG_float;position:absolute;top:15%;left:17%}@keyframes ws9LzG_float{0%,to{transform:translateY(0)rotate(0)}50%{transform:translateY(-7px)rotate(-1.2deg)}}.ws9LzG_kids{margin-top:clamp(32px,3vw,48px)}.ws9LzG_kidList{grid-template-columns:repeat(5,minmax(0,1fr));gap:10px;margin:0;padding:0;list-style:none;display:grid}.ws9LzG_kidList[data-count="2"]{grid-template-columns:repeat(2,minmax(0,1fr));max-width:640px}.ws9LzG_kidList[data-count="3"]{grid-template-columns:repeat(3,minmax(0,1fr));max-width:900px}.ws9LzG_kidList[data-count="4"]{grid-template-columns:repeat(4,minmax(0,1fr))}.ws9LzG_kidList>li{display:flex}.ws9LzG_kid{min-height:76px;box-shadow:0 0 0 1px var(--line), var(--shadow-1);color:var(--ink);transition:box-shadow var(--t-ui), transform var(--t-ui) var(--ease-out);background:#fff;border-radius:18px;flex:1;grid-template-rows:auto 1fr;grid-template-columns:48px minmax(0,1fr) 16px;gap:2px 8px;padding:13px 14px 13px 8px;text-decoration:none;display:grid;position:relative}.ws9LzG_kid:hover{box-shadow:0 0 0 1.5px var(--cobalt), var(--shadow-2);transform:translateY(-2px)}.ws9LzG_kidArt{grid-area:1/1/3;align-self:center;width:48px;height:48px}.ws9LzG_kidNum{color:var(--cobalt);font-size:12px;font-weight:var(--w-bold);font-variant-numeric:tabular-nums;grid-area:1/2}.ws9LzG_kidLabel{color:var(--ink);font-size:14px;font-weight:var(--w-bold);text-wrap:balance;grid-area:2/2;align-self:start;line-height:1.3}.ws9LzG_kidLabel:lang(zh){font-weight:var(--w-semi)}svg.ws9LzG_kidGo{width:16px;height:16px;color:var(--cobalt);transition:transform var(--t-ui) var(--ease-out);grid-area:1/3/3;align-self:center}.ws9LzG_kid:hover .ws9LzG_kidGo{transform:translate(3px)}.ws9LzG_toc{border-top:1px solid var(--line);grid-template-columns:auto minmax(0,1fr);align-items:baseline;gap:10px 24px;margin-top:clamp(32px,3vw,48px);padding-top:20px;display:grid}.ws9LzG_tocTitle{color:var(--slate-soft);font-size:12.5px;font-weight:var(--w-bold);letter-spacing:var(--track-label,.12em);text-transform:uppercase;white-space:nowrap}.ws9LzG_toc ol{counter-reset:toc;flex-wrap:wrap;gap:6px 8px;margin:0;padding:0;list-style:none;display:flex}.ws9LzG_toc li{counter-increment:toc}.ws9LzG_toc a{border-radius:var(--r-pill);background:var(--mist);min-height:34px;color:var(--ink);font-size:14px;font-weight:var(--w-semi);transition:background-color var(--t-fast), color var(--t-fast);align-items:center;gap:8px;padding:0 14px;text-decoration:none;display:inline-flex}.ws9LzG_toc a:before{content:counter(toc, decimal-leading-zero);color:var(--cobalt);font-size:12px;font-weight:var(--w-bold);font-variant-numeric:tabular-nums}.ws9LzG_toc a:hover{background:var(--ice);color:var(--cobalt)}@media (max-width:1199px){.ws9LzG_kidList,.ws9LzG_kidList[data-count="4"]{grid-template-columns:repeat(3,minmax(0,1fr))}}@media (max-width:1023px){.ws9LzG_grid{grid-template-columns:minmax(0,1fr) 240px;gap:24px}}@media (max-width:599px){.ws9LzG_in{padding-block:14px 44px}.ws9LzG_grid{grid-template-columns:minmax(0,1fr);gap:4px;margin-top:14px}.ws9LzG_art{order:-1;justify-self:start;width:88px;margin-left:-10px}.ws9LzG_orbit{display:none}.ws9LzG_object{width:100%;height:100%;inset:0}.ws9LzG_title,.ws9LzG_title:lang(zh){font-size:clamp(28px,7.4vw,34px)}.ws9LzG_toc{grid-template-columns:minmax(0,1fr)}.ws9LzG_toc ol{margin-inline:calc(-1 * var(--gutter));padding:2px var(--gutter) 8px;scrollbar-width:none;flex-wrap:nowrap;overflow-x:auto;-webkit-mask-image:linear-gradient(90deg,#000 calc(100% - 32px),#0000);mask-image:linear-gradient(90deg,#000 calc(100% - 32px),#0000)}.ws9LzG_toc li{flex:none;max-width:78vw}.ws9LzG_toc a{padding-block:6px;line-height:1.35}.ws9LzG_kidList,.ws9LzG_kidList[data-count="2"],.ws9LzG_kidList[data-count="3"],.ws9LzG_kidList[data-count="4"]{grid-template-columns:minmax(0,1fr);gap:8px}.ws9LzG_kid{grid-template-rows:auto;grid-template-columns:44px minmax(0,1fr) 18px;min-height:60px;padding:8px 14px 8px 6px}.ws9LzG_kidArt{grid-row:1;width:44px;height:44px}.ws9LzG_kidNum{display:none}.ws9LzG_kidLabel{grid-row:1;align-self:center;font-size:15px}svg.ws9LzG_kidGo{grid-row:1}}@media (max-width:359px){.ws9LzG_title:lang(zh){font-size:24px}.ws9LzG_title:lang(en){font-size:26px}}@media (prefers-reduced-motion:reduce){.ws9LzG_object{animation:none!important}.ws9LzG_kid:hover{transform:none}}
.bvfxlG_inner{--fs-h2:var(--fs-h2-inner);--section-y:var(--section-y-inner);display:block}.bvfxlG_inner:lang(zh){--fs-h2-zh:clamp(24px, 1vw + 17px, 34px)}.bvfxlG_inner h2{letter-spacing:-.018em}.bvfxlG_inner h2:lang(zh){letter-spacing:.01em}@media (max-width:599px){.bvfxlG_inner{--section-y:56px}}
._1KH4uG_section{--band:var(--paper);padding-block:var(--section-y);position:relative}._1KH4uG_paper{background:var(--paper)}._1KH4uG_mist{--band:var(--mist);background:var(--mist)}._1KH4uG_ink{--band:var(--ink);background:var(--ink);color:var(--on-dark);overflow:hidden}._1KH4uG_ink :focus-visible{outline-color:var(--focus-on-dark)}._1KH4uG_glow{pointer-events:none;background:radial-gradient(closest-side,#1f4fe066,#1f4fe000);width:900px;height:700px;position:absolute;bottom:-440px;left:-260px}._1KH4uG_wrap{position:relative}._1KH4uG_runPrev{padding-bottom:clamp(36px,2.5vw + 16px,56px)}._1KH4uG_runNext{padding-top:0}._1KH4uG_runNext>._1KH4uG_wrap{padding-top:clamp(36px,2.5vw + 16px,56px)}._1KH4uG_runNext>._1KH4uG_wrap:before{content:"";background:var(--line-strong);height:1px;position:absolute;top:0;left:0;right:0}._1KH4uG_runNext._1KH4uG_ink>._1KH4uG_wrap:before{background:var(--ink-line)}._1KH4uG_head{grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);align-items:end;gap:28px 72px;margin-bottom:56px;display:grid}._1KH4uG_solo{grid-template-columns:minmax(0,1fr)}._1KH4uG_head._1KH4uG_top{align-items:start}._1KH4uG_solo ._1KH4uG_headMain{max-width:860px}._1KH4uG_headSide{justify-self:start;justify-items:start;gap:10px;max-width:30em;display:grid}._1KH4uG_ink ._1KH4uG_introDark{color:var(--on-dark)}._1KH4uG_ink ._1KH4uG_introDark a{color:var(--sky)}._1KH4uG_ink ._1KH4uG_introDark a:hover,._1KH4uG_ink ._1KH4uG_links a:hover{color:#fff}._1KH4uG_columns{grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);align-items:start;gap:32px 72px;display:grid}._1KH4uG_stack{grid-template-columns:minmax(0,1fr);margin-bottom:0;position:sticky;top:112px}._1KH4uG_stack ._1KH4uG_headSide{justify-self:start}._1KH4uG_head._1KH4uG_stack{margin-bottom:0}._1KH4uG_body{min-width:0}._1KH4uG_links{flex-wrap:wrap;gap:4px 28px;margin:28px 0 0;padding:0;list-style:none;display:flex}._1KH4uG_head ._1KH4uG_links{gap:0 24px;margin-top:0}._1KH4uG_compact ._1KH4uG_more{min-height:36px;padding-block:5.6px;font-size:15.5px}@media (max-width:1023px){._1KH4uG_columns{grid-template-columns:minmax(0,1fr);gap:24px}._1KH4uG_stack{position:static}}@media (max-width:899px){._1KH4uG_head{grid-template-columns:minmax(0,1fr);gap:18px;margin-bottom:40px}._1KH4uG_headSide{justify-self:start}}@media (max-width:599px){._1KH4uG_head{margin-bottom:28px}._1KH4uG_runPrev{padding-bottom:36px}._1KH4uG_runNext{padding-top:0}._1KH4uG_runNext>._1KH4uG_wrap{padding-top:36px}}