/* VoltPeer detail system, September 2026. Inter is locally hosted under SIL OFL.
   Scientific artwork and its publication typography remain untouched. */
@font-face{font-family:Inter;src:url('assets/fonts/InterVariable.woff2') format('woff2');font-style:normal;font-weight:100 900;font-display:swap}
:root{--font-ui:Inter,-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei UI',sans-serif;--ease-out:cubic-bezier(.22,1,.36,1);--reading:66ch;--paper:#fafaf8;--soft:#f1f3ef;--ink:#242823;--muted:#5b625b;--line:#dde2da}
body{font-family:var(--font-ui);font-size:17px;line-height:1.7;font-optical-sizing:auto;-webkit-font-smoothing:antialiased}
button,input,textarea,select,summary{font-family:var(--font-ui)}
h1,h2,h3{font-family:var(--font-ui);text-wrap:balance}
p,li{overflow-wrap:break-word}
.brand-en,.stage-wordmark,.author-grid h3 span{font-family:var(--font-ui);font-style:normal}
.brand-en{font-size:12px;font-weight:550;letter-spacing:.065em}
.brand-cn{font-size:19px;letter-spacing:.025em}
html[lang=en] .brand-en{order:-1;color:var(--ink);font-size:21px;font-weight:650;letter-spacing:-.045em}
html[lang=en] .brand-cn{font-size:11px;color:var(--muted);font-weight:500;letter-spacing:.09em}
.topbar{background:rgba(250,250,248,.86);backdrop-filter:saturate(150%) blur(20px);-webkit-backdrop-filter:saturate(150%) blur(20px);transition:box-shadow .25s,border-color .25s}
.topbar.has-depth{box-shadow:0 6px 24px #24282308;border-color:#dce1d9}
.nav{min-height:76px}.navlinks a{font-size:14px;font-weight:550;position:relative}
.navlinks a[aria-current=page]::after{content:'';position:absolute;height:2px;background:var(--teal);bottom:4px;left:0;right:0;border-radius:1px}
.language-switcher select{font-size:13px;border-color:transparent;background:#edf0e9;border-radius:99px;padding:8px 23px 8px 13px}
.search-trigger{font-weight:500;font-size:14px}
.btn{border-radius:99px;padding:12px 25px;min-height:50px;letter-spacing:-.015em;transition:background .2s,box-shadow .2s,transform .2s var(--ease-out)}
.btn:active{transform:scale(.98)}
.btn:focus-visible,a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #477b68;outline-offset:4px}
.atelier-hero{padding-top:clamp(42px,5vw,68px)}
.atelier-intro{max-width:1040px;margin-bottom:48px}
.atelier-intro h1{font-weight:620;letter-spacing:-.045em;line-height:1.15;margin:20px 0 24px}
.atelier-kicker{font-size:13px;letter-spacing:.04em;font-weight:550;line-height:1.7}
.atelier-description{font-size:18px;line-height:1.65;max-width:780px;text-wrap:balance}
.atelier-lead{font-size:23px;font-weight:500;letter-spacing:-.025em}
.atelier-reassurance{font-size:13px;line-height:1.7;margin-top:20px}
.atelier-reassurance a{margin-inline-start:6px}
.atelier-actions{margin-top:28px}
html[lang=en] .atelier-intro h1{font-size:clamp(38px,5.45vw,76px);line-height:1.1;letter-spacing:-.055em;font-weight:600}
html[lang=en] .atelier-intro h1 em{display:inline-block}
html[lang=en] .atelier-description{max-width:57ch;font-size:18px;line-height:1.65}
html[lang=en] .atelier-kicker{letter-spacing:.015em}
html[lang=en] .page-head h1{font-size:clamp(36px,4.5vw,62px);line-height:1.1;letter-spacing:-.045em;max-width:26ch;hyphens:none}
html[lang=en] .page-head p{max-width:64ch;font-size:18px;line-height:1.7}
html[lang=en] .atelier-section h2{line-height:1.15;letter-spacing:-.04em;font-weight:580}
html[lang=en] .atelier-tasks h3{font-size:26px;line-height:1.23;letter-spacing:-.03em}
html[lang=en] .prose,html[lang=en] .wizard{line-height:1.7}
html[lang=en] .prose p,html[lang=en] .prose li{font-size:17px}
html[lang=en] .stage-note h2{font-size:30px;line-height:1.16;letter-spacing:-.035em}
.science-stage{padding:26px 28px 20px;border-radius:28px;background:linear-gradient(145deg,#eef2eb,#f4f4ef);border:1px solid #e0e6dd;box-shadow:0 20px 60px -35px #24382b38}
.stage-topline{font-size:12px;line-height:1.5}.stage-wordmark{font-size:13px;font-weight:500;letter-spacing:.015em;color:#5c6d5f}
.stage-tabs{margin:24px auto 28px;background:#e3e9df;box-shadow:inset 0 1px 3px #273c3010;padding:5px}
.stage-tabs button{font-size:14px;font-weight:550;transition:background .25s,box-shadow .25s,color .25s;padding:9px 23px}
.stage-tabs button[aria-selected=true]{box-shadow:0 3px 10px #273c3012}
.stage-body{grid-template-columns:minmax(0,1.85fr) minmax(230px,.75fr);gap:34px}
.stage-image{border-radius:12px;aspect-ratio:1.66;min-height:0;border:1px solid #e1e7df;box-shadow:0 8px 22px #2b3c3008}
.stage-image img{width:100%;height:100%;max-height:none;padding:18px 12px;object-fit:contain}
.stage-note h2{font-size:32px;line-height:1.3;font-weight:580}
.stage-note p{font-size:15px;line-height:1.75}
.stage-note .text-link{font-size:15px}.stage-detail{font-size:13px;line-height:1.6}
.stage-bottom{margin-top:22px;font-size:12px}
.atelier-section{padding:clamp(68px,8vw,112px) 0}
.atelier-tasks{border:0;gap:18px}
.atelier-tasks>a{background:#f0f2ec;border:1px solid #e1e5dd!important;border-radius:20px;padding:32px 28px;transition:transform .35s var(--ease-out),box-shadow .35s,background .25s}
.task-symbol{right:24px;top:28px;font:24px var(--font-ui);color:#527060}
.atelier-tasks h3{padding-right:24px}.atelier-tasks p{font-size:15px}
.palette-section{background:#eff1eb}.palette-paper{border:1px solid #e1e5dd;border-radius:18px;box-shadow:0 18px 40px -28px #263c2f40;padding:25px}
.palette-paper figcaption{font-size:12px}.palette-choice{transition:transform .2s,box-shadow .2s}.palette-choice[aria-pressed=true]{box-shadow:0 0 0 3px #fafaf8}
.discovery-art{border-radius:16px;transition:box-shadow .3s,transform .3s var(--ease-out)}
.getting-started-inner li>span{font:500 30px/1.2 var(--font-ui);font-variant-numeric:tabular-nums}
.getting-started-inner li{align-items:center}
.page-head{padding:clamp(45px,6vw,78px) 0 44px}
.page-block h2{line-height:1.22}.prose p{line-height:1.8}.row{gap:28px}
.gallery-caption{gap:22px}.gallery-caption h3{font-size:22px;line-height:1.3}.gallery-links{font-size:14px;line-height:1.55}.gallery-links a{min-height:44px}
.gallery-image{border-radius:16px;transition:box-shadow .25s,border-color .25s}.gallery-image:hover{border-color:#9bad9c;box-shadow:0 8px 25px #243b2c0b}
.choice{transition:border-color .2s,background .2s}.choice:hover{background:#f1f5ee}.choice small{line-height:1.65}
.task-text{font-family:var(--font-ui);font-size:16px;line-height:1.75;letter-spacing:normal}
.search-box{border-radius:22px}.search-result strong{font-size:17px;font-weight:600}.search-result em{font-style:normal}
.footer{background:#eff1eb}.footer p{max-width:34ch;line-height:1.7}.footer-tools{display:flex;align-items:center;gap:22px;flex-wrap:wrap;padding-top:24px;margin-top:24px;border-top:1px solid var(--line)}
.motion-toggle{display:inline-flex;align-items:center;gap:9px;border:0;background:transparent;color:var(--muted);font-size:13px;min-height:44px;padding:0}
.motion-toggle::before{content:'';width:28px;height:17px;border:1px solid #99a99b;border-radius:99px;background:radial-gradient(circle at 8px 50%,#fff 5px,transparent 6px),#78957d}
.motion-toggle[aria-pressed=true]::before{background:radial-gradient(circle at 19px 50%,#fff 5px,transparent 6px),#47695b}
.back-top{margin-left:auto;color:var(--muted);font-size:13px;min-height:44px;display:inline-flex;align-items:center}
.support-intro{max-width:900px}.support-layout{gap:52px}.support-payment{border:1px solid #e0e4db;background:#f0f2ec;border-radius:22px}
@media(hover:hover) and (prefers-reduced-motion:no-preference){html:not([data-reduced-motion=true]) .atelier-tasks>a:hover{transform:translateY(-4px);box-shadow:0 15px 25px -18px #20352c55;background:#f6f7f2}html:not([data-reduced-motion=true]) .discovery-rail>a:hover .discovery-art{transform:translateY(-3px);box-shadow:0 12px 24px -18px #20352c55}.btn:hover{box-shadow:0 5px 15px #73382416}}
html[data-reduced-motion=true]{scroll-behavior:auto}
html[data-reduced-motion=true] *,html[data-reduced-motion=true] *::before,html[data-reduced-motion=true] *::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
@media(max-width:1000px){.stage-body{grid-template-columns:minmax(0,1.5fr) minmax(210px,1fr);gap:25px}.stage-note h2,html[lang=en] .stage-note h2{font-size:27px}.nav{gap:12px}}
@media(max-width:760px){body{font-size:16px}.atelier-hero{padding-top:35px}.atelier-intro{margin-bottom:34px}.atelier-intro h1{font-size:clamp(32px,9.6vw,48px);letter-spacing:-.04em;line-height:1.2}.atelier-kicker{font-size:12px}.atelier-lead{font-size:20px}.atelier-description{font-size:16px;line-height:1.75}.atelier-reassurance{font-size:12px;max-width:38ch;margin-inline:auto}.science-stage{padding:18px 16px;border-radius:21px}.stage-tabs{margin:18px auto 22px;width:100%}.stage-tabs button{font-size:12px;padding:8px 9px}.stage-body{grid-template-columns:1fr;gap:24px}.stage-image{aspect-ratio:1.5}.stage-image img{padding:12px 8px}.stage-note{padding:0 6px}.stage-note h2{font-size:28px}.stage-note p{font-size:15px}.stage-detail{display:block;margin-left:0}.stage-bottom{font-size:11px}.atelier-tasks{gap:12px}.atelier-tasks>a{padding:25px}.palette-layout{gap:30px}.palette-paper{padding:15px}.getting-started-inner{gap:32px}.footer-tools{gap:15px}html[lang=en] .atelier-intro h1{font-size:clamp(29px,7.65vw,54px);line-height:1.13;letter-spacing:-.045em}html[lang=en] .atelier-description{font-size:16px;max-width:40ch}html[lang=en] .atelier-kicker span{display:block;margin:3px 0 0}html[lang=en] .atelier-section h2{font-size:34px}html[lang=en] .page-head h1{font-size:36px}html[lang=en] .page-head p{font-size:17px}}
@media(max-width:540px){.nav{min-height:88px;padding-block:10px;gap:2px 12px}.brand-cn{font-size:17px}.brand-en{font-size:11px}.menu-toggle,.search-trigger{font-size:13px;min-height:34px}.language-switcher select{min-height:36px}.navlinks.open{padding-top:12px}.atelier-actions{gap:20px}.atelier-description .mobile-only{display:none}html[lang=en] .brand-en{font-size:20px}.gallery-caption{display:block}.gallery-links{margin-top:12px}.stage-tabs button{font-size:11px;padding-inline:6px}.row .text-link{white-space:normal}.author-grid h3{font-size:25px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
/* Task-first refinement, shared by Chinese and English pages. */
.gallery-search-label{display:block;font-weight:650;margin:0 0 12px}
.gallery-query{width:100%;max-width:760px;font:inherit;padding:17px 20px;border:1px solid #b8c1b9;border-radius:12px;background:#fff;color:#242924}
.gallery-filters,.help-shortcuts{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0}
.gallery-filters button[aria-pressed="true"]{background:#e7eee7;color:#244938;box-shadow:inset 0 0 0 1px #6c8573}
.help-shortcuts a{padding:12px 16px;border:1px solid #cdd4ce;border-radius:10px;text-decoration:none}
.result-next{margin:26px 0;padding:24px;border-radius:16px;background:#edf1e9}
.result-next .btn{margin:10px 12px 10px 0}
.tool-install-note{margin:24px 0;max-width:760px}
.commons-advanced{align-self:center;min-width:150px}
.commons-advanced label{display:block;margin:12px 0}
.commons-stats strong{overflow-wrap:anywhere}
.gallery-slot[hidden],.gallery-category[hidden]{display:none!important}
.gallery-query:focus-visible,.help-shortcuts a:focus-visible{outline:3px solid #496c9f;outline-offset:4px}
.tool-group-section{padding-block:12px}
.tool-group{border-top:1px solid var(--line);padding:0}
.tool-group>summary{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:88px;cursor:pointer;list-style:none;padding:20px 0}
.tool-group>summary::-webkit-details-marker{display:none}
.tool-group>summary h2{margin:0;font-size:clamp(23px,3vw,32px);line-height:1.3}
.tool-group>summary::after{content:'+';font-size:28px;font-weight:400;color:var(--muted)}
.tool-group[open]>summary::after{content:'−'}
.tool-group>summary:focus-visible{outline:3px solid #496c9f;outline-offset:4px}
.tool-group[open]>.skill-guide-grid{padding:12px 0 36px}
.tool-group,.skill-guide{scroll-margin-top:120px}