:root{
  --bg:oklch(0.977 0.006 258.386);
  --surface:oklch(0.99703 0 89.876);
  --fg:oklch(0.265 0.024 276.544);
  --muted:oklch(0.475 0.025 276.544);
  --border:oklch(0.872 0.016 258.386);
  --accent:oklch(0.525 0.19 258.386);
  --raised:oklch(0.939 0.012 258.386);
  --control-border:oklch(0.63 0.025 276.544);
  --success:oklch(0.435 0.095 168);
  --success-bg:oklch(0.951 0.027 168);
  --success-border:oklch(0.76 0.047 168);
  --error:oklch(0.49 0.165 30);
  --on-accent:oklch(0.99703 0 89.876);
  --accent-hover:oklch(0.445 0.19 258.386);
  --display-font:"DengXian","Microsoft YaHei",sans-serif;
  --body-font:"Microsoft YaHei UI","PingFang SC",system-ui,sans-serif;
  --mono-font:"Cascadia Code","Consolas",monospace;
  --radius:14px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:96px}
body{margin:0;background:var(--bg);color:var(--fg);font:15px/1.75 var(--body-font);-webkit-font-smoothing:antialiased}
button,input,textarea,select{font:inherit;color:inherit}
button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}
button,a{touch-action:manipulation}
button{border:0;background:none;cursor:pointer}
a{color:inherit;text-decoration:none}
button,a{transition:transform 140ms cubic-bezier(.16,1,.3,1),background-color 160ms ease,border-color 160ms ease,color 160ms ease,box-shadow 180ms ease}
button:active:not(:disabled),.button:active{transform:translateY(1px)}
:focus-visible{outline:2px solid var(--accent);outline-offset:5px}
::selection{background:var(--accent);color:var(--on-accent)}
[hidden]{display:none!important}
h1,h2,h3,p{margin:0}
h1,h2,h3{font-family:var(--display-font);line-height:1.35;text-wrap:balance}
p{text-wrap:pretty}
.shell{width:min(1240px,calc(100% - clamp(32px,5vw,88px)));margin:auto}
.mono{font-family:var(--mono-font)}
.skip-link{position:fixed;top:-70px;left:20px;z-index:50;background:var(--accent);color:var(--on-accent);padding:12px 20px}
.skip-link:focus{top:10px}
.site-header{height:82px;border-bottom:1px solid var(--border);background:var(--bg);position:relative}
.header-inner{height:100%;display:flex;align-items:center;justify-content:space-between;gap:26px}
.brand{display:flex;align-items:center;gap:11px;min-height:44px;flex:none}
.brand img{width:39px;height:39px;object-fit:cover;border-radius:50%}
.brand-name{font:600 22px/1.2 var(--display-font);letter-spacing:2px}
.brand-code{display:block;margin-top:5px;color:var(--muted);font:12px/1 var(--mono-font);letter-spacing:.1em}
.nav{display:flex;align-self:stretch;gap:24px}
.nav a{min-width:44px;display:flex;align-items:center;justify-content:center;position:relative;color:var(--muted);font-size:13px}
.nav a:hover,.nav a.active{color:var(--fg)}
.nav a.active:after{content:"";position:absolute;bottom:18px;width:4px;height:4px;background:var(--fg);border-radius:50%}
.header-actions{display:flex;align-items:center;gap:15px;flex:none}
.search-trigger{display:flex;align-items:center;gap:17px;color:var(--muted);border:1px solid var(--control-border);border-radius:7px;padding:0 11px;min-height:44px}
.search-trigger:hover{background:var(--raised);color:var(--fg)}
.icon{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;flex:none}
kbd{font:12px var(--mono-font);border:1px solid var(--border);border-radius:3px;padding:1px 4px}
.header-join{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding-left:20px;border-left:1px solid var(--border);color:var(--muted);font-size:12px}
.header-join:hover{color:var(--fg)}
.menu-trigger{display:none;width:44px;height:44px;align-items:center;justify-content:center;border-radius:8px}
.page-main{min-height:calc(100vh - 168px)}
.page-hero{padding:72px 0 46px;border-bottom:1px solid var(--border);display:grid;grid-template-columns:minmax(0,1.25fr) minmax(280px,.75fr);gap:64px;align-items:end}
.eyebrow{color:var(--muted);font-size:12px;letter-spacing:.08em}
.eyebrow:before{content:"";display:inline-block;width:18px;height:1px;margin-right:10px;background:var(--muted);vertical-align:middle}
.page-hero h1{font-size:clamp(42px,5.2vw,72px);font-weight:600;margin:18px 0 18px;letter-spacing:0}
.page-lead{max-width:640px;color:var(--muted);font-size:16px;line-height:1.9}
.hero-aside{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));border-top:1px solid var(--border)}
.hero-stat{padding:18px 0 8px}
.hero-stat:nth-child(even){padding-left:24px;border-left:1px solid var(--border)}
.hero-stat strong{display:block;font:32px/1.2 var(--mono-font);font-weight:400}
.hero-stat span{display:block;margin-top:7px;color:var(--muted);font-size:12px}
.notice{margin-top:14px;color:var(--muted);font-size:12px}
.section{padding:48px 0}
.section+.section{border-top:1px solid var(--border)}
.section-head{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;margin-bottom:24px}
.section-head h2{font-size:26px;font-weight:500}
.section-head p{margin-top:8px;color:var(--muted);font-size:13px;max-width:64ch}
.button{min-height:48px;display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:0 20px;border:1px solid var(--control-border);border-radius:8px;font-size:13px;font-weight:500}
.button:hover{background:var(--surface);border-color:var(--muted)}
.button.primary{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}
.button.primary:hover{background:var(--accent-hover);border-color:var(--accent-hover)}
.toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:22px}
.filters{display:flex;gap:6px;flex-wrap:wrap}
.filter{min-height:44px;padding:0 14px;border:1px solid transparent;border-radius:7px;color:var(--muted);font-size:13px}
.filter:hover,.filter[aria-pressed=true]{background:var(--raised);border-color:var(--border);color:var(--fg)}
.filter small{margin-left:7px;font:12px var(--mono-font)}
.results{color:var(--muted);font-size:12px}
.project-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.project-card{display:flex;flex-direction:column;min-width:0;padding:24px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius)}
.project-card:hover{border-color:var(--control-border);box-shadow:0 8px 24px oklch(0.38 0.035 258.386 / .06)}
.card-top{display:flex;align-items:center;justify-content:space-between;gap:12px}
.card-index{width:38px;height:38px;display:grid;place-items:center;background:var(--raised);border:1px solid var(--border);border-radius:9px;font:12px var(--mono-font)}
.status{display:inline-flex;align-items:center;gap:6px;padding:4px 7px;border:1px solid var(--border);border-radius:5px;color:var(--muted);font-size:12px;line-height:1.5}
.status.recruiting{background:var(--success-bg);border-color:var(--success-border);color:var(--success)}
.status.recruiting:before{content:"";width:4px;height:4px;border-radius:50%;background:currentColor}
.project-card h2{font-size:21px;font-weight:500;margin:18px 0 8px}
.card-copy{color:var(--muted);min-height:3.5em}
.tags{margin:16px 0;color:var(--muted);font:12px/1.8 var(--mono-font);overflow-wrap:anywhere}
.task{margin-top:auto;padding-top:16px;border-top:1px solid var(--border)}
.task summary{min-height:44px;display:flex;align-items:center;justify-content:space-between;gap:12px;cursor:pointer;font-size:13px;list-style:none}
.task summary::-webkit-details-marker{display:none}
.task summary:after{content:"+";font:18px var(--mono-font);color:var(--muted)}
.task[open] summary:after{content:"−"}
.task p{padding:4px 0 12px;color:var(--muted);font-size:13px}
.task a{display:inline-flex;align-items:center;min-height:44px;color:var(--accent);font-size:13px}
.event-list{display:grid;gap:0;border-top:1px solid var(--border)}
.event-row{display:grid;grid-template-columns:130px minmax(0,1fr) 190px;gap:32px;align-items:start;padding:28px 0;border-bottom:1px solid var(--border)}
.event-date strong{display:block;font:30px/1.2 var(--mono-font);font-weight:400}
.event-date span{display:block;margin-top:7px;color:var(--muted);font-size:12px}
.event-copy h2{font-size:22px;font-weight:500}
.event-copy p{margin-top:8px;color:var(--muted);font-size:13px;max-width:64ch}
.event-meta{display:grid;gap:8px;color:var(--muted);font-size:12px}
.event-meta a{margin-top:8px;color:var(--fg);min-height:44px;display:flex;align-items:center}
.member-tools{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:24px}
.member-tools p{color:var(--muted);font-size:13px}
.member-select{min-height:44px;background:var(--surface);border:1px solid var(--control-border);border-radius:7px;padding:0 36px 0 12px;font-size:13px}
.member-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}
.member-card{min-width:0;padding:24px 20px 18px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius)}
.member-top{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.avatar{width:44px;height:44px;display:grid;place-items:center;flex:none;background:var(--raised);border:1px solid var(--border);border-radius:50%;font:20px var(--display-font);position:relative}
.avatar:after{content:"";position:absolute;right:-1px;bottom:0;width:7px;height:7px;border:2px solid var(--surface);border-radius:50%;background:var(--success)}
.member-card.offline .avatar:after{background:var(--control-border)}
.member-top h2{font-size:20px;font-weight:500}
.member-top p{color:var(--muted);font-size:12px}
.member-skills{margin-bottom:14px;color:var(--muted);font:12px var(--mono-font)}
.member-card dl{margin:0}
.member-card dl div{padding:11px 0;border-top:1px solid var(--border)}
.member-card dt{color:var(--muted);font-size:12px}
.member-card dd{margin:5px 0 0;font-size:13px;overflow-wrap:anywhere}
.member-card>a{min-height:44px;display:flex;align-items:flex-end;justify-content:flex-end;margin-top:8px;color:var(--accent);font-size:13px}
.faq-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(300px,.72fr);gap:48px;align-items:start}
.faq-list{border-top:1px solid var(--border)}
.faq{border-bottom:1px solid var(--border)}
.faq summary{min-height:68px;display:flex;align-items:center;justify-content:space-between;gap:20px;list-style:none;cursor:pointer;font-family:var(--display-font);font-size:19px}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:"+";font:20px var(--mono-font);color:var(--muted)}
.faq[open] summary:after{content:"−"}
.faq p{padding:0 42px 22px 0;color:var(--muted);font-size:13px}
.join-panel{padding:28px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius)}
.join-panel h2{font-size:24px;font-weight:500}
.join-panel>p{margin-top:8px;color:var(--muted);font-size:13px}
.field{margin-top:18px}
.field label,.field legend{display:block;margin-bottom:8px;font-size:13px}
.field input[type=text],.field textarea{width:100%;min-height:46px;padding:12px;border:1px solid var(--control-border);border-radius:7px;background:var(--bg);font-size:16px}
.field textarea{min-height:96px;resize:vertical}
fieldset{border:0;padding:0;margin:18px 0 0}
.choices{display:flex;flex-wrap:wrap;gap:8px}
.choice{min-height:44px;display:flex;align-items:center;gap:8px;padding:8px 11px;border:1px solid var(--control-border);border-radius:7px;font-size:13px}
.choice:has(input:checked){background:var(--raised);border-color:var(--muted)}
.choice input{width:16px;height:16px;accent-color:var(--accent)}
.form-note{margin:12px 0;color:var(--muted);font-size:12px}
.form-error{min-height:22px;margin:10px 0;color:var(--error);font-size:13px}
.form-success{margin-top:16px;padding:14px;border:1px solid var(--success-border);border-radius:8px;background:var(--success-bg);color:var(--success);font-size:13px}
.site-footer{padding:28px 0 30px;border-top:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;gap:24px;color:var(--muted);font-size:12px}
.footer-left,.footer-right{display:flex;align-items:center;gap:18px}
.footer-wordmark{color:var(--fg);letter-spacing:1.5px}
@media(max-width:1050px){
  .nav{gap:14px}.header-actions{gap:8px}.search-trigger kbd{display:none}
  .project-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.member-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .event-row{grid-template-columns:110px minmax(0,1fr)}.event-meta{grid-column:2}
}
@media(max-width:900px){
  .site-header{height:74px}.header-inner{gap:12px}.header-actions{margin-left:auto}.header-join{display:none}
  .menu-trigger{display:flex}.search-trigger{width:44px;border:0;padding:0;justify-content:center}
  .nav{display:none;position:absolute;top:100%;left:0;width:100%;height:auto;padding:12px 16px;background:var(--surface);border-bottom:1px solid var(--border);z-index:20;gap:8px;justify-content:space-between}
  .nav.open{display:flex}.nav a{min-height:44px;min-width:44px}.nav a.active:after{bottom:2px}
  .page-hero{grid-template-columns:1fr;gap:30px;padding-top:52px}.hero-aside{max-width:520px}
  .faq-layout{grid-template-columns:1fr}.join-panel{max-width:none}
}
@media(max-width:680px){
  .page-hero h1{font-size:clamp(38px,11vw,54px)}.page-lead{font-size:15px}
  .section{padding:38px 0}.section-head{flex-direction:column}.section-head .button{width:100%}
  .project-grid,.member-grid{grid-template-columns:1fr}.event-row{grid-template-columns:1fr;gap:14px}.event-meta{grid-column:auto}
  .member-tools{align-items:flex-start;flex-direction:column}.member-select{width:100%}
  .footer-left>span:last-child{display:none}.site-footer{align-items:flex-start}.footer-right{align-items:flex-end;flex-direction:column;gap:2px}
}
@media(max-width:520px){
  .brand-name{font-size:19px}.brand img{width:35px;height:35px}.nav{padding:10px 12px;gap:2px}.nav a{font-size:12px}
  .filters{width:100%}.filter{padding:0 10px}.toolbar{align-items:flex-start}.results{width:100%}
  .hero-aside{grid-template-columns:1fr 1fr}.hero-stat:nth-child(even){padding-left:18px}
  .join-panel{padding:22px 18px}.choices{display:grid;grid-template-columns:1fr 1fr}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}