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var(--line-strong);border-radius:var(--r-lg);box-shadow:var(--shadow);gap:8px;padding:6px;display:flex}.ask-row:focus-within{border-color:var(--cobalt)}.ask-row input{min-width:0;font:inherit;color:var(--ink);background:0 0;border:0;outline:none;flex:1;padding:0 10px;font-size:16px}.ask-note{min-height:1.4em;color:var(--ink-3);margin-top:8px;font-size:13.5px}.board{background:var(--night);color:var(--on-night);border-radius:var(--r-lg);overflow:hidden;box-shadow:0 30px 60px -34px #0e1116b3}.board-head{border-bottom:1px solid var(--night-line);justify-content:space-between;align-items:baseline;gap:12px;padding:16px 20px;display:flex}.board-head h2{letter-spacing:-.01em;font-size:17px}.board-head span{font-family:var(--font-mono);color:var(--on-night-2);white-space:nowrap;font-size:12px}.task-list{margin:0;padding:0;list-style:none}.task-list li+li{border-top:1px solid var(--night-line)}.task{transition:background .18s var(--ease);grid-template-columns:34px 1fr 18px;align-items:center;gap:12px;padding:15px 20px;text-decoration:none;display:grid}.task:hover{background:var(--night-2)}.task-no{font-family:var(--font-mono);color:var(--lime);font-size:13px}.task-title{font-size:16.5px;font-weight:600;line-height:1.3;display:block}.task-desc{color:var(--on-night-2);margin-top:2px;font-size:13.5px;line-height:1.45;display:block}.task svg{width:18px;height:18px;color:var(--on-night-2);transition:transform .18s var(--ease),color .18s var(--ease)}.task:hover svg{color:var(--lime);transform:translate(3px)}.section{padding:72px 0}.section--tint{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.section--night{background:var(--night);color:var(--on-night)}.section-head{gap:10px;max-width:720px;margin-bottom:30px;display:grid}.section-head h2{font-size:clamp(26px,3vw,34px)}.section-head p{color:var(--ink-2)}.section--night .section-head p{color:var(--on-night-2)}.section--night .eyebrow{color:var(--lime)}.facts{border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);grid-template-columns:repeat(2,minmax(0,1fr));gap:0;display:grid;overflow:hidden}.fact{border-bottom:1px solid var(--line);padding:20px 22px}.fact:nth-child(odd){border-right:1px solid var(--line)}.fact dt{font-family:var(--font-mono);letter-spacing:.06em;text-transform:uppercase;color:var(--ink-3);font-size:12px}.loc-zh .fact dt{font-family:var(--font-zh);letter-spacing:0;font-size:13px}.fact dd{margin:6px 0 0;font-size:16.5px}.fact dd a{color:var(--cobalt);white-space:nowrap;margin-left:6px;font-size:13px}.facts-note{color:var(--ink-3);margin-top:14px;font-size:13.5px}.tracks{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;display:grid}.track{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);flex-direction:column;gap:8px;padding:22px;text-decoration:none;display:flex}.section--tint .track{background:var(--paper)}.track:hover{border-color:var(--cobalt);box-shadow:var(--shadow);transform:translateY(-3px)}.track .task-no{color:var(--cobalt)}.track h3{font-size:19px}.track p{color:var(--ink-2);font-size:15px}.guide-list{border-top:1px solid var(--line);margin:0;padding:0;list-style:none}.guide-list:empty{display:none}.guide-empty{border:1px dashed var(--line-strong);border-radius:var(--r-lg);color:var(--ink-3);background:var(--surface);padding:22px;font-size:15px;display:none}.guide-list:empty+.guide-empty{display:block}.guide-row a{border-bottom:1px solid var(--line);transition:background .18s var(--ease);grid-template-columns:150px 1fr auto;align-items:baseline;gap:18px;padding:18px 4px;text-decoration:none;display:grid}.guide-row a:hover{background:var(--cobalt-wash)}.guide-tag{font-family:var(--font-mono);letter-spacing:.04em;text-transform:uppercase;color:var(--cobalt);font-size:12px}.guide-title{font-size:18px;font-weight:600;line-height:1.35;display:block}.guide-desc{color:var(--ink-2);margin-top:4px;font-size:14.5px;display:block}.guide-date{font-family:var(--font-mono);color:var(--ink-3);white-space:nowrap;font-size:12.5px}.method{border-top:1px solid var(--night-line);grid-template-columns:repeat(3,minmax(0,1fr));gap:0;display:grid}.method>div{padding:26px 26px 6px 0}.method>div+div{border-left:1px solid var(--night-line);padding-left:26px}.method h3{margin:10px 0 8px;font-size:18px}.method p{color:var(--on-night-2);font-size:15.5px}.faq{border-top:1px solid var(--line)}.faq details{border-bottom:1px solid var(--line)}.faq summary{cursor:pointer;padding:18px 34px 18px 0;font-size:17.5px;font-weight:600;list-style:none;position:relative}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:"+";font-family:var(--font-mono);color:var(--cobalt);font-size:20px;position:absolute;top:14px;right:6px}.faq details[open] summary:after{content:"−"}.faq details p{color:var(--ink-2);max-width:46em;padding:0 0 20px}.faq details a{color:var(--cobalt)}.cta-band{border-radius:var(--r-lg);background:var(--cobalt);color:#fff;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:20px;padding:30px;display:flex}.cta-band h2{font-size:24px}.cta-band p{color:#ffffffd1;max-width:34em;margin-top:6px}.page-head{border-bottom:1px solid var(--line);background:var(--surface);padding:54px 0 34px}.page-head h1{margin-top:12px;font-size:clamp(32px,4.2vw,46px)}.page-head p{color:var(--ink-2);max-width:40em;margin-top:14px;font-size:18px}.track-nav{flex-wrap:wrap;gap:8px;margin-top:22px;display:flex}.track-nav a{border:1px solid var(--line-strong);background:var(--paper);min-height:40px;color:var(--ink-2);border-radius:999px;align-items:center;padding:8px 12px;font-size:14.5px;text-decoration:none;display:inline-flex}.track-nav a:hover{border-color:var(--cobalt);color:var(--cobalt)}.track-block{padding:44px 0 8px}.track-block header{grid-template-columns:44px 1fr;align-items:baseline;gap:6px 10px;margin-bottom:18px;display:grid}.track-block header .task-no{color:var(--cobalt);font-size:14px}.track-block h2{font-size:25px}.track-block header p{color:var(--ink-2);grid-column:2;font-size:15.5px}.crumbs{color:var(--ink-3);flex-wrap:wrap;gap:8px;margin:0;padding:0;font-size:13.5px;list-style:none;display:flex}.crumbs li+li:before{content:"/";color:var(--line-strong);margin-right:8px}.crumbs a{color:var(--ink-2);text-decoration:none}.crumbs a:hover{color:var(--cobalt)}.article-head{background:var(--surface);border-bottom:1px solid var(--line);padding:44px 0 30px}.article-head h1{margin-top:16px;font-size:clamp(30px,4vw,44px);line-height:1.12}.loc-zh .article-head h1{line-height:1.3}.article-meta{color:var(--ink-3);flex-wrap:wrap;align-items:center;gap:8px 16px;margin-top:16px;font-size:13.5px;display:flex}.article-meta .badge{font-family:var(--font-mono);letter-spacing:.05em;text-transform:uppercase;background:var(--lime);color:var(--ink);border-radius:4px;padding:2px 8px;font-size:11.5px}.loc-zh .article-meta .badge{font-family:var(--font-zh);letter-spacing:0;font-size:12.5px}.article-body{padding:40px 0 72px}.prose{color:var(--ink);font-size:18px}.prose>*+*{margin-top:1.1em}.prose h2{margin-top:1.9em;padding-top:.2em;font-size:27px}.prose h3{margin-top:1.6em;font-size:21px}.prose a{color:var(--cobalt);text-underline-offset:3px}.prose ul{padding-left:1.3em;list-style:outside}.prose ol{padding-left:1.3em;list-style:decimal}.prose li::marker{color:var(--cobalt);font-weight:600}.prose li+li{margin-top:.4em}.prose code{font-family:var(--font-mono);background:var(--surface-2);border-radius:4px;padding:.12em .38em;font-size:.88em}.prose pre{background:var(--night);color:var(--on-night);border-radius:var(--r-lg);padding:18px 20px;font-size:14.5px;line-height:1.6;overflow-x:auto}.prose pre code{color:inherit;background:0 0;padding:0}.prose blockquote{border-left:3px solid var(--cobalt);color:var(--ink-2);margin-left:0;padding:4px 0 4px 18px}.prose table{border-collapse:collapse;width:100%;font-size:15.5px;display:block;overflow-x:auto}.prose th,.prose td{border:1px solid var(--line);text-align:left;vertical-align:top;padding:9px 12px}.prose th{background:var(--surface-2);font-weight:600}.prose img{border-radius:var(--r-lg);border:1px solid var(--line)}.article-foot{gap:22px;margin-top:48px;display:grid}.article-note{color:var(--ink-2);background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--cobalt);border-radius:var(--r);padding:14px 16px;font-size:14.5px}.article-note a{color:var(--cobalt)}.next-card{border-radius:var(--r-lg);background:var(--night);color:var(--on-night);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;padding:22px;display:flex}.next-card h2{font-size:20px}.next-card p{color:var(--on-night-2);margin-top:4px;font-size:15px}.doc{padding:44px 0 80px}.doc .prose h2:first-child{margin-top:0}.notfound{text-align:left;padding:96px 0 110px}.notfound .code{font-family:var(--font-mono);color:var(--cobalt);font-size:15px}.notfound h1{margin:12px 0 14px;font-size:clamp(34px,5vw,52px)}.notfound p{color:var(--ink-2);max-width:34em}.notfound .hero-actions{margin-top:28px}.site-foot{background:var(--night);color:var(--on-night-2);padding:56px 0 28px;font-size:15px}.site-foot a{color:var(--on-night);text-decoration:none}.site-foot a:hover{color:var(--lime)}.foot-grid{grid-template-columns:1.6fr 1fr 1fr;gap:40px;display:grid}.foot-about p{max-width:30em;margin-top:14px}.foot-unofficial{font-size:13.5px}.site-foot h2{font-family:var(--font-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--on-night-2);margin-bottom:14px;font-size:12px;font-weight:500}.loc-zh .site-foot h2{font-family:var(--font-zh);letter-spacing:.02em;font-size:13.5px}.site-foot ul{gap:4px;margin:0;padding:0;list-style:none;display:grid}.site-foot li a{padding:5px 0;display:inline-block}.foot-base{border-top:1px solid var(--night-line);flex-wrap:wrap;justify-content:space-between;gap:8px 24px;margin-top:40px;padding-top:20px;font-size:13px;display:flex}.note-dialog{border-radius:var(--r-lg);border:0;max-width:min(440px,100vw - 32px);margin:auto;padding:0;box-shadow:0 40px 80px -30px #0e111699}.note-dialog::backdrop{background:#0e11168c}.note-dialog>div{gap:12px;padding:26px;display:grid}.note-dialog h2{font-size:20px}.note-dialog p{color:var(--ink-2);font-size:15.5px}.note-dialog form{margin-top:6px}@media(max-width:940px){.hero-grid{grid-template-columns:1fr;gap:36px}.tracks{grid-template-columns:repeat(2,minmax(0,1fr))}.method{grid-template-columns:1fr}.method>div,.method>div+div{border-left:0;padding:22px 0 18px}.method>div+div{border-top:1px solid var(--night-line)}.foot-grid{grid-template-columns:1fr 1fr}.foot-about{grid-column:1/-1}}@media(max-width:760px){:root{--gutter:18px}body{font-size:16.5px}.menu-btn{display:inline-flex}.nav{background:var(--surface);border-bottom:1px solid var(--line);box-shadow:var(--shadow);padding:12px var(--gutter) 18px;flex-direction:column;align-items:stretch;gap:4px;display:none;position:absolute;top:100%;left:0;right:0}.nav.is-open{display:flex}.nav-link{border-bottom:1px solid var(--line);border-radius:0;padding:13px 8px;font-size:17px}.nav-link[aria-current=page]{box-shadow:inset 3px 0 0 var(--cobalt);padding-left:14px}.lang-switch{align-self:flex-start;margin:12px 0 8px;font-size:15px}.lang-switch>*{min-height:44px;padding:8px 16px}.head-cta{min-height:48px;font-size:16px}.brand-tag{display:none}.hero{padding:36px 0 44px}.hero-sub{font-size:17px}.section{padding:52px 0}.facts{grid-template-columns:1fr}.fact:nth-child(odd){border-right:0}.tracks{grid-template-columns:1fr}.guide-row a{grid-template-columns:1fr;gap:6px;padding:16px 2px}.ask-row{flex-direction:column}.ask-row input{min-height:46px}.foot-grid{grid-template-columns:1fr;gap:28px}.cta-band{padding:24px}.prose{font-size:17px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}@property --tw-ordinal{syntax:"*";inherits:false}@property --tw-slashed-zero{syntax:"*";inherits:false}@property --tw-numeric-figure{syntax:"*";inherits:false}@property --tw-numeric-spacing{syntax:"*";inherits:false}@property --tw-numeric-fraction{syntax:"*";inherits:false}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}