/* NeoWorld Studio — Early Access。设计变量、导航、首屏、侧栏、页脚沿用 neoworldproject.github.io/Studio 的样式，表单部分按同一套变量补写 */
@font-face{font-family:"Fusion Pixel";src:url("../assets/fusion-pixel-latin-subset.woff2") format("woff2");font-weight:400;font-style:normal;font-display:swap}

:root{
  --bg:#0b0d0b;--bg-2:#0f120f;--surface:#121612;--surface-2:#181d18;
  --line:rgba(214,235,200,.085);--line-strong:rgba(214,235,200,.16);
  --text:#eef1ea;--text-2:#b3b9ad;--text-3:#7f877a;
  --accent:#b8f34a;--accent-soft:rgba(184,243,74,.085);--accent-line:rgba(184,243,74,.42);--accent-ink:#0e1606;
  --error:#ff8a7a;--error-soft:rgba(255,138,122,.08);
  --hero-wire:#8b9875;
  --radius:12px;--radius-sm:7px;--shadow:0 30px 70px -38px rgba(0,0,0,.85);
  --ease-out:cubic-bezier(.16,1,.3,1);
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI Variable Text","Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  --display:-apple-system,BlinkMacSystemFont,"Segoe UI Variable Display","Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
  --pixel:"Fusion Pixel",var(--mono);
  --nav-h:64px;
  color-scheme:dark;font-family:var(--sans)
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 24px);-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}
::selection{background:var(--accent);color:var(--accent-ink)}
a{color:inherit;text-decoration:none;transition:color .2s}
a:hover{color:var(--accent)}
p{font-size:17px;line-height:1.75;color:var(--text-2)}
a,button{-webkit-tap-highlight-color:transparent}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--accent);outline-offset:4px;border-radius:4px}
.skip-link{position:fixed;top:-100px;left:20px;z-index:40;padding:10px 14px;border-radius:var(--radius-sm);background:var(--accent);color:var(--accent-ink);font-weight:600}
.skip-link:focus{top:12px}

/* 导航 */
.nav{position:sticky;top:0;z-index:30;background:color-mix(in srgb,var(--bg) 78%,transparent);-webkit-backdrop-filter:saturate(1.4) blur(14px);backdrop-filter:saturate(1.4) blur(14px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:var(--nav-h);width:90%;max-width:1320px;margin:0 auto}
.brand{display:flex;align-items:center;gap:11px;font:600 20px/1 var(--display);letter-spacing:-.02em}
.brand:hover{color:var(--text)}
.brand-mark{width:34px;height:34px;flex-shrink:0;padding:4px;border-radius:9px;background:#050605;box-shadow:inset 0 0 0 1px var(--line)}
.brand-dot{margin-left:5px;font:10px/1 var(--pixel);letter-spacing:.1em;vertical-align:top;color:var(--accent)}
.nav nav{display:flex;align-items:center;gap:6px;font-size:13.5px}
.nav nav a{padding:8px 12px;border-radius:999px;color:var(--text-2);transition:color .2s,background-color .2s}
.nav nav a:hover{background:var(--surface-2);color:var(--text)}
.nav nav span{margin-left:4px;color:var(--accent)}
.studio-link{margin-left:8px;border:1px solid var(--line-strong)}

/* 首屏：右侧 3D 线框 + 左侧标题 */
.hero{position:relative;display:flex;align-items:center;min-height:clamp(560px,calc(100vh - var(--nav-h) - 60px),700px);overflow:hidden;background:var(--bg);border-bottom:1px solid var(--line)}
#world{position:absolute;inset:0 0 0 36%;opacity:0;transition:opacity 1.2s ease}
#world.is-ready{opacity:.85}
#world canvas{display:block;width:100%;height:100%}
.veil{position:absolute;inset:0;pointer-events:none;background:linear-gradient(90deg,var(--bg) 30%,color-mix(in srgb,var(--bg) 92%,transparent) 42%,color-mix(in srgb,var(--bg) 22%,transparent) 72%,transparent),linear-gradient(0deg,var(--bg),transparent 22%)}
.hero-glow{position:absolute;left:-10%;top:-30%;width:70%;height:120%;pointer-events:none;background:radial-gradient(closest-side,rgba(184,243,74,.07),transparent 70%)}
.cover{position:relative;z-index:1;width:90%;max-width:1320px;margin:auto;padding:64px 0 60px}
.eyebrow{margin:0 0 12px;font:12px/1.4 var(--pixel);letter-spacing:.1em;color:var(--accent)}
.cover>.eyebrow{display:inline-flex;align-items:center;gap:10px;margin-bottom:26px;padding:6px 11px;border:1px solid var(--accent-line);border-radius:999px;background:var(--accent-soft)}
.cover>.eyebrow:before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent)}
h1{max-width:820px;margin:0 0 20px;font:600 clamp(40px,4.6vw,70px)/1.04 var(--display);letter-spacing:-.035em;text-wrap:balance}
.title-line{display:block;overflow:hidden;padding-bottom:.14em;margin-bottom:-.14em}
.title-line>span{display:inline-block}
.period{color:var(--accent)}
.cover-subtitle{margin:0 0 14px;font-size:clamp(18px,1.6vw,21px);line-height:1.45;color:var(--text)}
.cover-summary{max-width:520px;margin:0 0 34px;font-size:16.5px;line-height:1.65}
.project-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;max-width:410px}
.resource-card{display:flex;align-items:center;gap:12px;min-width:0;min-height:68px;padding:13px 15px;border:1px solid var(--line-strong);border-radius:var(--radius-sm);background:color-mix(in srgb,var(--surface) 80%,transparent);color:var(--text);transition:transform .25s var(--ease-out),border-color .2s,box-shadow .25s,filter .25s}
.resource-card:hover{color:var(--text);border-color:var(--accent-line)}
.resource-card-primary{border-color:var(--accent);background:var(--accent);color:var(--accent-ink)}
.resource-card-primary:hover{color:var(--accent-ink);transform:translateY(-2px);filter:brightness(1.06);box-shadow:0 12px 34px -12px rgba(184,243,74,.55)}
.resource-icon{display:block;flex:0 0 22px;width:22px;height:22px}
.resource-copy{display:flex;flex-direction:column;gap:3px;min-width:0;font-size:14px;line-height:1.2}
.resource-copy strong{font-weight:600;white-space:nowrap}
.resource-copy small{font-size:11.5px;color:var(--text-3);white-space:nowrap}
.resource-card-primary small{color:#3d5418}
.resource-arrow{margin-left:auto;font-size:16px;transition:transform .25s var(--ease-out)}
.resource-card-primary:hover .resource-arrow{transform:translateY(2px)}
.resource-card:not(.resource-card-primary):hover .resource-arrow{transform:translate(2px,-2px)}

/* 入场动画：纯 CSS，动画结束停在可见状态；系统开启"减少动态效果"时不播放 */
@media(prefers-reduced-motion:no-preference){
  .title-line>span{animation:rise 1.15s var(--ease-out) both;animation-delay:calc(var(--i) * 110ms + 60ms)}
  .reveal{animation:fade-up .95s var(--ease-out) both;animation-delay:calc(var(--i) * 90ms + 420ms)}
  .cover>.eyebrow{animation-delay:0s}
}
@keyframes rise{from{transform:translateY(105%)}to{transform:none}}
@keyframes fade-up{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
@keyframes pop-in{from{opacity:0;transform:translateY(6px) scale(.985)}}

/* 正文：左侧流程目录 + 右侧申请表 */
.article-grid{display:grid;grid-template-columns:180px minmax(0,1fr);gap:64px;width:90%;max-width:1320px;margin:0 auto;padding:72px 0 24px}
.article-toc{min-width:0}
.article-toc nav{position:sticky;top:calc(var(--nav-h) + 32px);display:flex;flex-direction:column;border-left:1px solid var(--line)}
.article-toc p{margin:0 0 14px;padding-left:16px;font:10.5px var(--mono);letter-spacing:.12em;color:var(--text-3)}
.article-toc a{position:relative;display:flex;align-items:baseline;gap:11px;padding:8px 0 8px 16px;font:10.5px var(--mono);color:var(--text-3)}
.article-toc a:before{content:"";position:absolute;left:-1px;top:8px;bottom:8px;width:2px;border-radius:2px;background:var(--accent);transform:scaleY(0);transition:transform .35s var(--ease-out)}
.article-toc a span{font:13.5px var(--sans);color:var(--text-2);transition:color .2s}
.article-toc a:hover span{color:var(--text)}
.article-toc a.is-active{color:var(--accent)}
.article-toc a.is-active span{color:var(--text)}
.article-toc a.is-active:before{transform:none}
.article-body{min-width:0;max-width:820px}
.article-section{margin:0;padding:0 0 72px}
.section-heading{display:flex;align-items:flex-start;gap:18px;margin:0 0 28px}
.section-heading>div{min-width:0}
.section-number{display:grid;place-items:center;flex-shrink:0;width:36px;height:36px;margin-top:2px;border:1px solid var(--line-strong);border-radius:9px;font:12px var(--mono);color:var(--text-3)}
.section-heading .eyebrow{margin-bottom:10px}
h2{margin:0;font:600 clamp(26px,2.4vw,36px)/1.18 var(--display);letter-spacing:-.028em;text-wrap:balance}
.section-intro{margin:0 0 28px;text-wrap:pretty}

/* 申请表 */
.form-card{position:relative;padding:32px;border:1px solid var(--line);border-radius:var(--radius);background:linear-gradient(135deg,var(--accent-soft),transparent 45%),var(--surface);box-shadow:var(--shadow)}
.form-card:before{content:"";position:absolute;left:0;top:28px;width:3px;height:44px;border-radius:0 3px 3px 0;background:var(--accent)}
.apply-form{display:flex;flex-direction:column;gap:22px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.form-group{display:flex;flex-direction:column;gap:8px;min-width:0}
.form-group>label{font-size:13.5px;font-weight:600;color:var(--text)}
.required{color:var(--accent)}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:12px 14px;border:1px solid var(--line-strong);border-radius:var(--radius-sm);background:var(--bg-2);color:var(--text);font:15px/1.5 var(--sans);transition:border-color .2s,box-shadow .2s,background-color .2s}
.form-group input:hover,.form-group select:hover,.form-group textarea:hover{border-color:rgba(214,235,200,.26)}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--accent-line);background:var(--bg);box-shadow:0 0 0 3px var(--accent-soft)}
.form-group .is-invalid,.form-group .is-invalid:hover{border-color:var(--error);background:var(--error-soft)}
::placeholder{color:var(--text-3);opacity:1}
.form-group textarea{min-height:132px;resize:vertical}
.form-group select{appearance:none;cursor:pointer;padding-right:40px;background-image:url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5 6 6.5 11 1.5' stroke='%237f877a' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 15px center}
.form-group select option{background:var(--surface);color:var(--text)}
.checkbox-label{position:relative;display:flex;align-items:flex-start;gap:12px;cursor:pointer;font-size:14.5px;line-height:1.55;color:var(--text-2)}
.checkbox-label input{position:absolute;opacity:0;width:20px;height:20px;margin:0}
.checkbox-custom{position:relative;flex-shrink:0;width:20px;height:20px;margin-top:1px;border:1px solid var(--line-strong);border-radius:5px;background:var(--bg-2);transition:background-color .2s,border-color .2s}
.checkbox-label input:checked+.checkbox-custom{background:var(--accent);border-color:var(--accent)}
.checkbox-label input:checked+.checkbox-custom:after{content:"";position:absolute;left:6px;top:2px;width:5px;height:10px;border:solid var(--accent-ink);border-width:0 2px 2px 0;transform:rotate(45deg)}
.checkbox-label input:focus-visible+.checkbox-custom{outline:2px solid var(--accent);outline-offset:3px}
.checkbox-text a{color:var(--text);text-decoration:underline;text-decoration-color:var(--accent-line);text-underline-offset:3px}
.checkbox-text a:hover{color:var(--accent)}
.btn-submit{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;min-height:54px;margin-top:6px;padding:14px 22px;border:1px solid var(--accent);border-radius:var(--radius-sm);background:var(--accent);color:var(--accent-ink);font:600 15.5px var(--sans);cursor:pointer;transition:transform .25s var(--ease-out),box-shadow .25s,filter .25s}
.btn-submit:hover:not(:disabled){transform:translateY(-2px);filter:brightness(1.06);box-shadow:0 12px 34px -12px rgba(184,243,74,.55)}
.btn-submit:disabled{opacity:.6;cursor:not-allowed}
.btn-arrow{font-size:17px;transition:transform .25s var(--ease-out)}
.btn-submit:hover:not(:disabled) .btn-arrow{transform:translateX(3px)}
.message{display:none;padding:14px 16px;border:1px solid var(--line-strong);border-radius:var(--radius-sm);font-size:14.5px;line-height:1.5}
.message.show{display:block;animation:pop-in .3s var(--ease-out)}
.message.success{border-color:var(--accent-line);background:var(--accent-soft);color:var(--accent)}
.message.error{border-color:rgba(255,138,122,.4);background:var(--error-soft);color:var(--error)}

/* 页脚 */
.site-footer{display:flex;justify-content:space-between;align-items:center;gap:20px;width:90%;max-width:1320px;margin:0 auto;padding:28px 0 36px;border-top:1px solid var(--line);font-size:13px;color:var(--text-3)}
.site-footer div{display:flex;gap:24px}
.footer-brand{font:600 15px var(--display);color:var(--text-2);white-space:nowrap}

@media(min-width:1600px){.hero{min-height:720px}}
@media(max-width:1100px){.article-grid{grid-template-columns:140px minmax(0,1fr);gap:36px}h1{font-size:5.1vw}.cover-summary{max-width:450px}.article-toc a span{font-size:12.5px}}
@media(max-width:800px){
  .nav-inner{width:88%;gap:14px}
  .brand{font-size:18px;gap:9px}.brand-mark{width:30px;height:30px}
  .nav nav{gap:2px;font-size:12.5px}.nav nav a{padding:7px 9px}.nav nav a:nth-child(2){display:none}.studio-link{margin-left:0}
  .hero{min-height:0}.cover{width:88%;padding:44px 0 40px}
  #world{inset:0}#world.is-ready{opacity:.3}
  .veil{background:linear-gradient(90deg,color-mix(in srgb,var(--bg) 90%,transparent) 10%,color-mix(in srgb,var(--bg) 66%,transparent) 70%,color-mix(in srgb,var(--bg) 33%,transparent))}
  .cover>.eyebrow{margin-bottom:22px}
  h1{font-size:clamp(32px,8.4vw,52px);line-height:1.08}
  .cover-subtitle{font-size:17px}.cover-summary{max-width:440px;font-size:15px}
  .project-links{max-width:440px;gap:8px}
  .resource-card{min-height:62px;padding:11px 12px;gap:9px}
  .article-grid{display:block;width:88%;padding:48px 0 8px}
  .article-toc{display:none}
  .form-card{padding:22px 18px}
  .form-grid{grid-template-columns:1fr}
  .site-footer{width:88%;align-items:flex-start;padding:24px 0 30px}.site-footer div{flex-wrap:wrap;justify-content:flex-end;gap:14px;font-size:12px}
}
@media(max-width:360px){.project-links{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}#world{transition:none}.message.show{animation:none}}