:root{
  --cream-paper:#F7EFE2;
  --cream:#FFF9F0;
  --ink:#2B1B12;
  --cocoa:#5A3A28;
  --pomelo:#FF7A18;
  --berry:#8E2D7A;
  --lime:#96C11F;
  --crust:#FFD166;
  --caramel:#C7402A;
  --paper-grey:#EDE3D3;
  --font-head:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
  --shell:1200px;
  --border:2.5px solid var(--ink);
  --shadow-hard:6px 6px 0 var(--ink);
  --radius-lg:28px;
  --radius-md:18px;
  --radius-sm:12px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{margin:0;}
ul,ol{padding:0;list-style:none;}
button,input,select,textarea{font:inherit;color:inherit;background:none;border:0;}
img,svg,picture,video{display:block;max-width:100%;}
a{color:var(--berry);text-decoration-thickness:1.5px;text-underline-offset:3px;}
a:hover{text-decoration:underline;}
[hidden]{display:none !important;}
body{
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.85;
  color:var(--ink);
  background-color:var(--cream-paper);
  background-image:repeating-linear-gradient(135deg,rgba(90,58,40,.035) 0 2px,transparent 2px 14px);
  -webkit-font-smoothing:antialiased;
}
p{margin-bottom:1.2em;}
p:last-child{margin-bottom:0;}
h1,h2,h3,h4{font-family:var(--font-head);font-weight:900;letter-spacing:-.02em;line-height:1.18;}
h1{font-size:clamp(34px,5vw,56px);}
h2{font-size:clamp(28px,3.6vw,40px);}
h3{font-size:clamp(22px,2.4vw,28px);}
h4{font-size:clamp(18px,1.9vw,22px);}
strong{font-weight:800;}
.pie-mono{font-family:var(--font-mono);font-weight:700;letter-spacing:.02em;font-variant-numeric:tabular-nums;}
:focus-visible{outline:3px dashed var(--berry);outline-offset:3px;border-radius:4px;}

/* ---------- skip link ---------- */
.pie-skip{
  position:absolute;left:-9999px;top:0;z-index:200;
  padding:12px 24px;background:var(--pomelo);color:var(--ink);
  font-weight:800;text-decoration:none;
  border:var(--border);border-radius:0 0 18px 0;
  box-shadow:4px 4px 0 var(--ink);
}
.pie-skip:focus{left:0;}

/* ---------- header ---------- */
.pie-header{
  position:sticky;top:0;z-index:60;
  background:var(--cream-paper);
  border-bottom:var(--border);
}
.pie-header__inner{
  width:min(100% - 36px,var(--shell));
  margin:0 auto;
}
.pie-header__top{
  display:flex;align-items:center;gap:20px;
  padding:14px 0 8px;
}
.pie-brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink);}
.pie-brand:hover{text-decoration:none;}
.pie-brand__mark{
  width:46px;height:46px;flex:none;border-radius:50%;
  border:var(--border);
  background:conic-gradient(from 22deg,var(--pomelo) 0 22%,var(--crust) 22% 40%,var(--berry) 40% 58%,var(--lime) 58% 72%,var(--cream) 72% 100%);
  box-shadow:3px 3px 0 var(--ink);
}
.pie-brand__text{display:flex;flex-direction:column;line-height:1.15;}
.pie-brand__name{font-family:var(--font-head);font-size:24px;font-weight:900;letter-spacing:-.02em;}
.pie-brand__tagline{font-size:12.5px;color:var(--cocoa);letter-spacing:.08em;}
.pie-version{
  margin-left:auto;display:inline-flex;align-items:center;gap:6px;
  padding:5px 6px 5px 14px;
  background:var(--cream);
  border:2px solid var(--ink);
  border-radius:999px;
  box-shadow:3px 3px 0 var(--ink);
}
.pie-version__label{font-size:12px;color:var(--cocoa);letter-spacing:.1em;white-space:nowrap;}
.pie-version__pill{
  font-family:var(--font-mono);font-size:13.5px;font-weight:700;
  padding:4px 13px;border-radius:999px;border:2px solid transparent;
  color:var(--cocoa);cursor:pointer;
  transition:background-color .18s ease,color .18s ease,transform .18s ease,border-color .18s ease;
}
.pie-version__pill:hover{background:var(--paper-grey);}
.pie-version__pill.is-active{
  background:var(--pomelo);color:var(--ink);border-color:var(--ink);
  transform:translateY(-1px);
}
.pie-dish-toggle{
  display:none;align-items:center;
  padding:5px;border-radius:999px;
  border:var(--border);background:var(--cream);
  box-shadow:3px 3px 0 var(--ink);cursor:pointer;
}
.pie-dish-toggle__dish{
  position:relative;display:block;width:34px;height:34px;border-radius:50%;
  border:2px solid var(--ink);
  background:conic-gradient(var(--pomelo) 0 25%,var(--crust) 0 50%,var(--berry) 0 75%,var(--lime) 0 100%);
  transition:transform .3s ease;
}
.pie-dish-toggle__slice{position:absolute;inset:6px;border-radius:50%;background:var(--cream);border:2px solid var(--ink);}
.pie-dish-toggle.is-open .pie-dish-toggle__dish{transform:rotate(90deg);}
.pie-nav{border-top:1.5px dashed rgba(90,58,40,.35);}
.pie-nav__list{display:flex;flex-wrap:wrap;gap:4px;padding:8px 0 11px;}
.pie-nav__link{
  display:inline-block;padding:7px 16px;border-radius:999px;
  font-size:15px;font-weight:800;color:var(--ink);text-decoration:none;
  border:2px solid transparent;
  transition:background-color .18s ease,border-color .18s ease,transform .18s ease,color .18s ease;
}
.pie-nav__link:hover{background:var(--crust);border-color:var(--ink);transform:translateY(-2px);text-decoration:none;}
.pie-nav__link[aria-current="page"]{background:var(--berry);color:var(--cream);border-color:var(--ink);}

/* ---------- footer ---------- */
.pie-footer{
  position:relative;margin-top:88px;
  background:var(--ink);color:var(--cream-paper);
}
.pie-footer::before{
  content:"";display:block;height:10px;
  background:repeating-linear-gradient(90deg,var(--pomelo) 0 42px,var(--crust) 42px 84px,var(--berry) 84px 126px,var(--lime) 126px 168px);
}
.pie-footer__inner{width:min(100% - 36px,var(--shell));margin:0 auto;}
.pie-footer__grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.4fr;gap:32px;
  padding:52px 0 36px;
}
.pie-footer__col{min-width:0;}
.pie-footer__brand{
  font-family:var(--font-head);font-size:24px;font-weight:900;letter-spacing:-.02em;
  color:var(--cream);margin-bottom:10px;
}
.pie-footer__lede{font-size:14.5px;line-height:1.8;color:rgba(247,239,226,.82);}
.pie-footer__meta{
  margin-top:12px;font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  color:var(--crust);
}
.pie-footer__title{
  font-size:14px;font-weight:900;letter-spacing:.14em;color:var(--crust);
  margin-bottom:14px;
}
.pie-footer__list li{margin-bottom:9px;}
.pie-footer__link{
  color:var(--cream-paper);font-size:14.5px;text-decoration:none;
  border-bottom:1.5px dotted rgba(247,239,226,.42);
  transition:color .16s ease,border-color .16s ease;
}
.pie-footer__link:hover{color:var(--crust);border-color:var(--crust);text-decoration:none;}
.pie-copy{
  display:inline-flex;align-items:center;flex-wrap:wrap;gap:8px;
  margin:0 0 10px;padding:7px 15px;
  font-family:var(--font-mono);font-size:13.5px;
  color:var(--cream-paper);
  border:2px dashed rgba(247,239,226,.42);border-radius:999px;
  cursor:pointer;word-break:break-all;text-align:left;
  transition:border-color .16s ease,color .16s ease,background-color .16s ease;
}
.pie-copy:hover{border-color:var(--crust);color:var(--crust);}
.pie-copy__done{display:none;font-family:var(--font-body);font-size:12px;font-weight:800;color:var(--lime);}
.pie-copy.is-copied{border-color:var(--lime);border-style:solid;}
.pie-copy.is-copied .pie-copy__done{display:inline;}
.pie-footer__address{font-size:14px;color:rgba(247,239,226,.82);margin-top:4px;}
.pie-footer__hint{font-size:12.5px;line-height:1.75;color:rgba(247,239,226,.6);margin-top:8px;}
.pie-footer__bottom{
  display:flex;flex-wrap:wrap;justify-content:center;gap:8px 24px;
  padding:18px 0 26px;
  border-top:1.5px dashed rgba(247,239,226,.28);
  font-size:12.5px;color:rgba(247,239,226,.68);text-align:center;
}
.pie-footer__legal,.pie-footer__icp{margin:0;}

/* ---------- layout ---------- */
.pie-main{padding-bottom:8px;}
.pie-container{width:min(100% - 36px,var(--shell));margin-inline:auto;}
.pie-section{padding:56px 0;}
.pie-section__head{max-width:760px;margin-bottom:28px;}
.pie-section__eyebrow{
  display:inline-block;margin-bottom:12px;padding:3px 14px;
  font-family:var(--font-mono);font-size:12px;font-weight:700;letter-spacing:.14em;
  color:var(--ink);background:var(--crust);
  border:2px solid var(--ink);border-radius:999px;
}
.pie-section__title{margin-bottom:14px;}
.pie-section__lede{color:var(--cocoa);font-size:16.5px;max-width:64ch;}
.pie-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;}
.pie-span-4{grid-column:span 4;}
.pie-span-6{grid-column:span 6;}
.pie-span-8{grid-column:span 8;}
.pie-span-12{grid-column:span 12;}

/* ---------- buttons ---------- */
.pie-btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:12px 24px;border-radius:999px;
  border:var(--border);background:var(--cream);color:var(--ink);
  font-size:15.5px;font-weight:800;text-decoration:none;
  box-shadow:4px 4px 0 var(--ink);
  transition:transform .16s ease,box-shadow .16s ease,background-color .16s ease;
}
.pie-btn:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--ink);text-decoration:none;}
.pie-btn:active{transform:translate(2px,2px);box-shadow:2px 2px 0 var(--ink);}
.pie-btn--pomelo{background:var(--pomelo);}
.pie-btn--berry{background:var(--berry);color:var(--cream);}
.pie-btn--lime{background:var(--lime);}

/* ---------- breadcrumb ---------- */
.pie-breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  margin:22px 0 6px;font-size:13.5px;color:var(--cocoa);
}
.pie-breadcrumb__link{color:var(--cocoa);text-decoration:none;border-bottom:1.5px dotted currentColor;}
.pie-breadcrumb__link:hover{color:var(--berry);border-color:var(--berry);text-decoration:none;}
.pie-breadcrumb__sep{color:var(--pomelo);font-weight:800;}
.pie-breadcrumb__current{color:var(--ink);font-weight:800;}

/* ---------- cards & shapes ---------- */
.pie-card{
  background:var(--cream);
  border:var(--border);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-hard);padding:24px;
  transition:transform .2s ease,box-shadow .2s ease;
}
.pie-card:hover{transform:translate(-3px,-3px);box-shadow:9px 9px 0 var(--ink);}
.pie-card__title{margin-bottom:10px;}
.pie-card__text{font-size:15.5px;color:var(--cocoa);}
.pie-card__meta{
  margin-top:14px;font-family:var(--font-mono);font-size:12.5px;
  letter-spacing:.06em;color:var(--cocoa);
}
.pie-dish{
  display:inline-flex;align-items:center;justify-content:center;
  width:56px;height:56px;border-radius:50%;
  border:var(--border);background:var(--crust);
  font-family:var(--font-mono);font-size:19px;font-weight:700;color:var(--ink);
  box-shadow:3px 3px 0 var(--ink);
}
.pie-dish--orange{background:var(--pomelo);}
.pie-dish--berry{background:var(--berry);color:var(--cream);}
.pie-dish--lime{background:var(--lime);}
.pie-arch{
  border:var(--border);border-radius:999px 999px var(--radius-lg) var(--radius-lg);
  overflow:hidden;background:var(--cream);box-shadow:var(--shadow-hard);
}
.pie-badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 13px;border-radius:999px;
  border:2px solid var(--ink);background:var(--cream);
  font-size:12.5px;font-weight:800;letter-spacing:.02em;color:var(--ink);
}
.pie-badge--lime{background:var(--lime);}
.pie-badge--orange{background:var(--pomelo);}
.pie-badge--berry{background:var(--berry);color:var(--cream);}
.pie-badge--caramel{background:var(--caramel);color:var(--cream);}
.pie-fresh{animation:pie-float 4s ease-in-out infinite;}
@keyframes pie-float{0%,100%{transform:translateY(0);}50%{transform:translateY(-4px);}}

/* ---------- filter chips ---------- */
.pie-chips{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:18px;}
.pie-chip{
  padding:8px 18px;border-radius:999px;
  border:2px solid var(--berry);background:transparent;color:var(--berry);
  font-size:14px;font-weight:800;cursor:pointer;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
.pie-chip:hover{transform:translateY(-2px);background:rgba(142,45,122,.1);}
.pie-chip.is-active{background:var(--berry);color:var(--cream);border-color:var(--ink);}
.pie-filter-note{
  margin:4px 0 0;padding:10px 16px;font-size:14px;color:var(--cocoa);
  background:var(--paper-grey);border:2px dashed var(--cocoa);border-radius:var(--radius-sm);
}

/* ---------- pie crust panel ---------- */
.pie-panel{
  margin-bottom:14px;
  background:var(--cream);
  border:var(--border);border-radius:var(--radius-md);
  box-shadow:5px 5px 0 var(--ink);
  overflow:hidden;
}
.pie-panel__head{
  display:flex;align-items:center;gap:12px;
  padding:16px 20px;
  font-family:var(--font-head);font-size:17px;font-weight:900;letter-spacing:-.01em;
  cursor:pointer;list-style:none;
  transition:background-color .18s ease;
}
.pie-panel__head::-webkit-details-marker{display:none;}
.pie-panel__head:hover{background:var(--crust);}
.pie-panel__head::before{
  content:"◤";flex:none;color:var(--pomelo);font-size:14px;
  transition:transform .22s ease;
}
.pie-panel[open] .pie-panel__head::before{transform:rotate(90deg);}
.pie-panel[open] .pie-panel__head{border-bottom:2px dashed var(--paper-grey);}
.pie-panel__body{padding:16px 20px 20px;animation:pie-crust .22s ease both;}
@keyframes pie-crust{from{opacity:0;transform:scaleY(.94);transform-origin:top;}to{opacity:1;transform:none;}}

/* ---------- storyboard ---------- */
.pie-storyboard{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.pie-storyboard__step{
  padding:24px;background:var(--cream);
  border:var(--border);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-hard);
}
.pie-storyboard__icon{
  display:flex;align-items:center;justify-content:center;
  width:52px;height:52px;margin-bottom:14px;
  border:var(--border);border-radius:50%;
  background:var(--crust);font-size:22px;line-height:1;
}
.pie-storyboard__step:nth-child(2) .pie-storyboard__icon{background:var(--pomelo);}
.pie-storyboard__step:nth-child(3) .pie-storyboard__icon{background:var(--lime);}

/* ---------- mirror ---------- */
.pie-mirror{
  display:grid;grid-template-columns:1fr 1fr;
  background:var(--cream);
  border:var(--border);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-hard);overflow:hidden;
}
.pie-mirror__col{padding:26px;min-width:0;}
.pie-mirror__col + .pie-mirror__col{border-left:2px dashed var(--cocoa);}
.pie-mirror__col-title{margin-bottom:12px;}

/* ---------- media ---------- */
.pie-media{
  position:relative;overflow:hidden;
  background:var(--paper-grey);
  border:var(--border);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-hard);
}
.pie-media__img{display:block;width:100%;height:100%;object-fit:cover;aspect-ratio:4/3;}
.pie-media--wide .pie-media__img{aspect-ratio:16/9;}
.pie-media--tall .pie-media__img{aspect-ratio:3/4;}
.pie-media--square .pie-media__img{aspect-ratio:1/1;}
.pie-media__fallback{
  display:flex;align-items:center;justify-content:center;
  aspect-ratio:4/3;
  font-family:var(--font-mono);font-size:13px;color:var(--cocoa);
  background:repeating-linear-gradient(45deg,var(--paper-grey) 0 14px,var(--cream) 14px 28px);
}
.pie-media--wide .pie-media__fallback{aspect-ratio:16/9;}
.pie-media--tall .pie-media__fallback{aspect-ratio:3/4;}
.pie-media--square .pie-media__fallback{aspect-ratio:1/1;}
.pie-media__caption{
  padding:10px 16px;font-size:13px;color:var(--cocoa);
  background:var(--cream);border-top:2px dashed var(--paper-grey);
}

/* ---------- reveal ---------- */
.pie-reveal{
  opacity:0;
  transform:translateY(16px) rotate(-1.5deg);
  transition:opacity .26s ease,transform .26s ease;
}
.pie-reveal.is-visible{opacity:1;transform:none;}

/* ---------- progress & back to top ---------- */
.pie-progress{
  position:fixed;top:0;left:0;z-index:90;
  width:0;height:4px;
  background:linear-gradient(90deg,var(--pomelo),var(--crust),var(--berry),var(--lime));
}
.pie-top{
  position:fixed;right:20px;bottom:24px;z-index:80;
  display:flex;align-items:center;justify-content:center;
  width:52px;height:52px;border-radius:50%;
  border:var(--border);background:var(--pomelo);color:var(--ink);
  font-size:20px;line-height:1;cursor:pointer;
  box-shadow:4px 4px 0 var(--ink);
  opacity:0;pointer-events:none;
  transition:opacity .2s ease,transform .2s ease;
}
.pie-top.is-visible{opacity:1;pointer-events:auto;}
.pie-top:hover{transform:translate(-2px,-2px);}

/* ---------- tablet ---------- */
@media (max-width:1080px){
  .pie-footer__grid{grid-template-columns:1.4fr 1fr 1fr;gap:28px;}
  .pie-footer__col:last-child{grid-column:span 3;}
}

/* ---------- mobile ---------- */
@media (max-width:880px){
  body{font-size:16px;line-height:1.8;}
  .pie-header__inner{width:min(100% - 28px,var(--shell));}
  .pie-header__top{padding:11px 0;gap:12px;}
  .pie-brand__mark{width:40px;height:40px;}
  .pie-brand__name{font-size:21px;}
  .pie-brand__tagline{font-size:11.5px;letter-spacing:.06em;}
  .pie-version{margin-left:auto;padding:4px 4px 4px 8px;}
  .pie-version__label{display:none;}
  .pie-version__pill{font-size:12.5px;padding:4px 10px;}
  .pie-dish-toggle{display:inline-flex;}
  .pie-nav{position:fixed;top:0;right:0;z-index:70;width:0;height:0;border-top:0;}
  .pie-nav__list{position:absolute;top:0;right:0;display:block;padding:0;margin:0;}
  .pie-nav__item{
    position:absolute;top:0;right:0;
    opacity:0;pointer-events:none;
    transform:translate(0,0) scale(.6);
    transition:transform .26s cubic-bezier(.2,.8,.3,1),opacity .2s ease;
  }
  .pie-nav__item:nth-child(1){transition-delay:.03s;}
  .pie-nav__item:nth-child(2){transition-delay:.06s;}
  .pie-nav__item:nth-child(3){transition-delay:.09s;}
  .pie-nav__item:nth-child(4){transition-delay:.12s;}
  .pie-nav__item:nth-child(5){transition-delay:.15s;}
  .pie-nav__item:nth-child(6){transition-delay:.18s;}
  .pie-nav[data-open="true"] .pie-nav__item{opacity:1;pointer-events:auto;}
  .pie-nav[data-open="true"] .pie-nav__item:nth-child(1){transform:translate(-92px,78px);}
  .pie-nav[data-open="true"] .pie-nav__item:nth-child(2){transform:translate(-156px,116px);}
  .pie-nav[data-open="true"] .pie-nav__item:nth-child(3){transform:translate(-192px,172px);}
  .pie-nav[data-open="true"] .pie-nav__item:nth-child(4){transform:translate(-196px,230px);}
  .pie-nav[data-open="true"] .pie-nav__item:nth-child(5){transform:translate(-164px,286px);}
  .pie-nav[data-open="true"] .pie-nav__item:nth-child(6){transform:translate(-104px,334px);}
  .pie-nav__link{
    padding:9px 15px;font-size:14px;white-space:nowrap;
    background:var(--cream);border:2px solid var(--ink);
    box-shadow:3px 3px 0 var(--ink);
  }
  .pie-nav__link:hover{transform:none;background:var(--crust);}
  .pie-grid{grid-template-columns:repeat(4,1fr);gap:16px;}
  .pie-span-4,.pie-span-6,.pie-span-8{grid-column:span 4;}
  .pie-span-12{grid-column:span 4;}
  .pie-section{padding:40px 0;}
  .pie-storyboard{grid-template-columns:1fr;}
  .pie-mirror{grid-template-columns:1fr;}
  .pie-mirror__col + .pie-mirror__col{border-left:0;border-top:2px dashed var(--cocoa);}
  .pie-footer{margin-top:56px;}
  .pie-footer__grid{grid-template-columns:1fr 1fr;gap:26px;padding:40px 0 26px;}
  .pie-footer__col:last-child{grid-column:span 2;}
  .pie-footer__brand{font-size:21px;}
  .pie-top{right:14px;bottom:16px;width:46px;height:46px;}
}

@media (max-width:560px){
  .pie-footer__grid{grid-template-columns:1fr;}
  .pie-footer__col:last-child{grid-column:span 1;}
  .pie-copy{width:100%;}
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .pie-reveal{opacity:1;transform:none;}
  .pie-fresh{animation:none;}
}