/* ============================================================
   奇异果赛场 · /assets/site.css
   共享外壳：头部竖向导轨 + 顶部索引条 / 页脚 / 通用组件
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
img,svg,video{display:block;max-width:100%}
table{border-collapse:collapse;width:100%}
summary{cursor:pointer}

/* ---------- 2. 变量 ---------- */
:root{
  --ink:#1A1A1A;
  --purple:#4B1F6F;
  --kiwi:#8CC63F;
  --kiwi-deep:#9BD64F;
  --yolk:#F2E205;
  --moss:#3E6B3A;
  --clay:#C75B2A;
  --rock:#C9C2B4;
  --rice:#F7F4EC;
  --mist:#E9E1F2;
  --deepless:#0E2B22;

  --font-display:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:"Source Han Sans SC","Noto Sans SC","PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --rail-w:104px;
  --topbar-h:64px;
  --max-w:1400px;
  --radius:24px;
  --radius-sm:14px;
  --shadow:0 2px 12px rgba(26,26,26,.08);
  --shadow-lift:0 8px 26px rgba(26,26,26,.12);
  --skew:-6deg;
  --ease:cubic-bezier(.2,.8,.2,1);
}

/* ---------- 3. 基础排版 ---------- */
body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background-color:var(--rice);
  background-image:radial-gradient(rgba(75,31,111,.055) 1px,transparent 1px);
  background-size:22px 22px;
  padding-left:var(--rail-w);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:800;line-height:1.15;letter-spacing:-.01em}

#main-content{padding-top:var(--topbar-h);display:block}

:focus-visible{outline:2px solid var(--kiwi);outline-offset:3px;border-radius:6px}

.mono{font-family:var(--font-mono);font-weight:600;letter-spacing:.02em}
.index-num{font-family:var(--font-mono);font-size:12px;font-weight:600;letter-spacing:.12em;color:var(--moss)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:700;letter-spacing:.18em;color:var(--moss);text-transform:none}
.lede{font-size:clamp(16px,1.6vw,19px);line-height:1.8;color:rgba(26,26,26,.72);max-width:34em}
.display{font-family:var(--font-display);font-weight:800;font-size:clamp(40px,7vw,96px);line-height:1.02;letter-spacing:-.02em}
.display__accent{position:relative;display:inline-block;color:var(--purple)}
.display__accent::after{content:"";position:absolute;left:-1%;right:-1%;bottom:-.06em;height:.1em;background:var(--kiwi);border-radius:2px;transform:skewX(var(--skew))}

/* ---------- 4. 布局容器 ---------- */
.container{width:100%;max-width:var(--max-w);margin-inline:auto;padding-inline:clamp(16px,4vw,48px)}
.section{padding-block:clamp(40px,6vw,80px)}
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(16px,2vw,24px)}
.span-3{grid-column:span 3}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-6{grid-column:span 6}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}
.span-12{grid-column:span 12}

/* ---------- 5. 图形母题 ---------- */
.kiwi-dot{
  flex:none;width:14px;height:14px;border-radius:50%;
  background:radial-gradient(circle at 50% 50%,var(--yolk) 0 30%,var(--kiwi) 30% 72%,#5C8A2A 72%);
  box-shadow:0 0 0 2px rgba(140,198,63,.22);
}
.kiwi-slice{
  --size:132px;
  position:relative;flex:none;display:block;
  width:var(--size);height:var(--size);border-radius:50%;overflow:hidden;
  background:radial-gradient(circle at 50% 50%,var(--yolk) 0 22%,#DCEBA8 22% 34%,var(--kiwi) 34% 68%,#6E9E33 68% 100%);
  box-shadow:inset 0 0 0 6px rgba(26,26,26,.06),var(--shadow);
}
.kiwi-slice::before{
  content:"";position:absolute;inset:0;border-radius:50%;
  background:repeating-conic-gradient(from 3deg,rgba(26,26,26,.55) 0 .9deg,transparent .9deg 18deg);
  -webkit-mask-image:radial-gradient(circle,transparent 0 24%,#000 24% 62%,transparent 62%);
  mask-image:radial-gradient(circle,transparent 0 24%,#000 24% 62%,transparent 62%);
}

/* ---------- 6. 按钮 / 标签 / 筛选 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:999px;
  border:1px solid transparent;
  font-size:14px;font-weight:700;letter-spacing:.02em;line-height:1;
  transition:transform .18s var(--ease),background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn--sm{min-height:44px;padding:0 18px;font-size:13px}
.btn--block{width:100%}
.btn--kiwi{background:var(--kiwi);color:var(--ink);box-shadow:var(--shadow)}
.btn--kiwi:hover{background:var(--kiwi-deep)}
.btn--yolk{background:var(--yolk);color:var(--ink)}
.btn--yolk:hover{background:#FFF04A}
.btn--purple{background:var(--purple);color:var(--rice)}
.btn--purple:hover{background:#5C2A85}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--rock)}
.btn--ghost:hover{border-color:var(--ink);background:var(--mist)}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  min-height:28px;padding:0 12px;border-radius:999px;
  background:var(--moss);color:var(--rice);
  font-size:12px;font-weight:700;letter-spacing:.06em;line-height:1;
}
.tag--kiwi{background:var(--kiwi);color:var(--ink)}
.tag--yolk{background:var(--yolk);color:var(--ink)}
.tag--clay{background:var(--clay);color:#fff}
.tag--outline{background:transparent;border:1px solid var(--rock);color:var(--ink)}

.filter-bar{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  min-height:44px;padding:0 18px;border-radius:999px;
  border:1px solid var(--rock);background:transparent;color:var(--ink);
  font-size:13px;font-weight:700;letter-spacing:.02em;line-height:1;
  transition:background-color .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.chip:hover{border-color:var(--ink)}
.chip[aria-pressed="true"]{background:var(--kiwi);border-color:var(--kiwi);color:var(--ink)}
[data-filter-item][hidden]{display:none}

/* ---------- 7. 卡片 / 折叠 / 面包屑 / 图片容器 ---------- */
.card{
  background:var(--rice);
  border:1px solid var(--rock);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:clamp(20px,3vw,32px);
}
.card--mist{background:var(--mist);border-color:transparent}

.fold{
  border:1px solid var(--rock);border-radius:var(--radius-sm);
  background:var(--rice);overflow:hidden;
}
.fold summary{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  min-height:54px;padding:12px 18px;list-style:none;
  font-weight:700;font-size:15px;color:var(--ink);
}
.fold summary::-webkit-details-marker{display:none}
.fold summary::after{content:"+";font-family:var(--font-mono);font-weight:600;font-size:18px;color:var(--moss)}
.fold[open] summary::after{content:"–"}
.fold[open] summary{border-bottom:1px solid var(--rock)}
.fold__body{padding:14px 18px 18px;font-size:14px;line-height:1.8;color:rgba(26,26,26,.72)}

.breadcrumbs{font-size:12px;letter-spacing:.06em}
.breadcrumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;color:rgba(26,26,26,.55)}
.breadcrumbs__list li{display:flex;align-items:center;gap:8px}
.breadcrumbs__list li+li::before{content:"/";color:var(--rock)}
.breadcrumbs a{color:var(--moss);font-weight:600}
.breadcrumbs a:hover{color:var(--purple)}

.media-frame{
  position:relative;overflow:hidden;display:block;
  border:1px solid var(--rock);border-radius:var(--radius);
  background:linear-gradient(135deg,var(--mist) 0%,#E3EBD2 55%,#D8E7BE 100%);
  aspect-ratio:16/10;
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame figcaption{
  position:absolute;left:0;right:0;bottom:0;
  padding:16px 18px;font-size:12px;line-height:1.6;color:var(--ink);
  background:linear-gradient(0deg,rgba(247,244,236,.96) 0%,rgba(247,244,236,0) 100%);
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--cut{clip-path:polygon(0 0,100% 0,100% 100%,0 calc(100% - 56px))}

/* ---------- 8. 头部外壳 ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:300;
  padding:12px 20px;border-radius:999px;
  background:var(--ink);color:var(--rice);
  font-size:14px;font-weight:700;letter-spacing:.04em;
  transform:translateY(-180%);
  transition:transform .2s var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{transform:translateY(0);outline-color:var(--yolk)}

.scroll-progress{
  position:fixed;top:0;left:var(--rail-w);right:0;height:3px;z-index:80;
  pointer-events:none;
}
.scroll-progress::after{
  content:"";display:block;height:100%;width:100%;
  background:linear-gradient(90deg,var(--kiwi) 0%,var(--yolk) 100%);
  transform-origin:0 50%;
  transform:scaleX(var(--p,0));
}

.topbar{
  position:fixed;top:0;left:var(--rail-w);right:0;z-index:50;
  height:var(--topbar-h);
  display:flex;align-items:center;
  background:linear-gradient(180deg,rgba(247,244,236,.97) 0%,rgba(247,244,236,.76) 100%);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:background-color .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.site-header[data-scrolled="true"] .topbar{
  background:var(--rice);
  border-bottom-color:var(--rock);
  box-shadow:0 1px 0 rgba(26,26,26,.04);
}
.topbar__inner{
  width:100%;max-width:var(--max-w);margin-inline:auto;
  padding-inline:clamp(16px,4vw,48px);
  display:flex;align-items:center;gap:16px;
}
.topbar__brand{
  display:none;align-items:center;gap:8px;
  font-family:var(--font-display);font-weight:800;font-size:15px;letter-spacing:-.01em;color:var(--ink);
}
.topbar__index{
  display:flex;align-items:center;gap:8px;margin-right:auto;
  font-size:12px;font-weight:500;letter-spacing:.08em;color:rgba(26,26,26,.62);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.topbar__sep{opacity:.35}
.topbar__actions{display:flex;align-items:center;gap:10px;margin-left:auto}

.fav-btn{
  position:relative;
  display:inline-flex;align-items:center;gap:6px;
  min-height:44px;padding:0 16px;border-radius:999px;
  border:1px solid var(--rock);background:transparent;
  font-size:13px;font-weight:600;color:rgba(26,26,26,.72);line-height:1;
  transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease);
}
.fav-btn:hover{color:var(--ink);border-color:var(--ink)}
.fav-btn[aria-pressed="true"]{background:var(--yolk);border-color:var(--yolk);color:var(--ink)}
.fav-btn__star{font-size:12px;color:var(--clay)}
.fav-btn[aria-pressed="true"] .fav-btn__star{color:var(--ink)}

.nav-toggle{
  display:none;align-items:center;gap:8px;
  min-height:44px;padding:0 16px;border-radius:999px;
  background:var(--purple);color:var(--rice);
  font-size:13px;font-weight:700;letter-spacing:.08em;line-height:1;
}
.nav-toggle__bars{position:relative;display:block;width:16px;height:10px}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";position:absolute;left:0;right:0;height:2px;border-radius:2px;
  background:currentColor;transition:transform .2s var(--ease),top .2s var(--ease),bottom .2s var(--ease);
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{bottom:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:4px;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{bottom:4px;transform:rotate(-45deg)}

/* 竖向导轨 */
.rail{
  position:fixed;top:0;left:0;bottom:0;z-index:60;
  width:var(--rail-w);
  display:flex;flex-direction:column;align-items:center;
  gap:8px;padding:18px 8px 20px;
  background:var(--purple);color:var(--rice);
  overflow-y:auto;overscroll-behavior:contain;
  box-shadow:1px 0 0 rgba(26,26,26,.14);
}
.rail::after{
  content:"";position:absolute;top:0;right:0;bottom:0;width:3px;
  background:linear-gradient(180deg,var(--kiwi) 0%,var(--yolk) 55%,var(--kiwi) 100%);
}
.rail__brand{
  display:flex;flex-direction:column;align-items:center;gap:10px;
  padding:4px 0 16px;width:100%;
}
.rail__mark{width:22px;height:22px}
.rail__brand-name{
  font-family:var(--font-display);font-weight:800;font-size:13px;
  line-height:1.3;letter-spacing:.06em;text-align:center;color:var(--rice);
}

.nav{width:100%;margin-block:auto}
.nav__list{display:flex;flex-direction:column;gap:4px;width:100%}
.nav__item{width:100%}
.nav__link{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
  min-height:44px;padding:9px 2px;border-radius:12px;
  font-size:12px;font-weight:600;letter-spacing:.04em;line-height:1.3;text-align:center;
  color:rgba(247,244,236,.72);
  transition:background-color .18s var(--ease),color .18s var(--ease);
}
.nav__num{
  font-family:var(--font-mono);font-size:10px;font-weight:600;
  letter-spacing:.14em;color:var(--kiwi);
}
.nav__link:hover{background:rgba(140,198,63,.18);color:var(--rice)}
.nav__link[aria-current="page"]{background:var(--kiwi);color:var(--ink);font-weight:800}
.nav__link[aria-current="page"] .nav__num{color:rgba(26,26,26,.6)}

.rail__foot{margin-top:auto;padding-top:14px;width:100%}
.rail__season{
  font-size:10px;font-weight:600;letter-spacing:.12em;line-height:1.7;
  text-align:center;color:rgba(247,244,236,.58);
}
.rail__season .mono{color:var(--yolk);font-size:11px}

/* ---------- 9. 页脚 ---------- */
.site-footer{
  background:var(--deepless);
  color:rgba(247,244,236,.82);
  border-top:6px solid var(--kiwi);
  padding:clamp(48px,7vw,88px) clamp(16px,4vw,48px) 0;
}
.footer__grid{
  max-width:var(--max-w);margin-inline:auto;
  display:grid;
  grid-template-columns:minmax(240px,1.1fr) minmax(0,2fr) minmax(240px,1.1fr);
  gap:clamp(28px,4vw,64px);
  padding-bottom:clamp(36px,5vw,56px);
}
.footer__kiwi{--size:84px}
.footer__brand-name{
  display:inline-block;margin-top:22px;
  font-family:var(--font-display);font-weight:800;font-size:clamp(24px,2.4vw,32px);
  letter-spacing:-.01em;color:var(--rice);
}
.footer__brand-name:hover{color:var(--yolk)}
.footer__tagline{
  margin:10px 0 20px;max-width:22em;
  font-size:14px;line-height:1.8;color:rgba(247,244,236,.66);
}
.footer__cols{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(16px,2vw,28px);
}
.footer__col-title{
  margin-bottom:12px;
  font-family:var(--font-body);font-size:12px;font-weight:700;
  letter-spacing:.16em;color:var(--kiwi);
}
.footer__links{display:flex;flex-direction:column}
.footer__links a{
  display:inline-flex;align-items:center;min-height:44px;
  font-size:14px;color:rgba(247,244,236,.82);
  transition:color .18s var(--ease),padding-left .18s var(--ease);
}
.footer__links a:hover{color:var(--yolk);padding-left:4px}
.footer__contact-line{
  font-size:14px;line-height:1.7;color:rgba(247,244,236,.86);
  overflow-wrap:anywhere;
}
.footer__contact-line.mono{
  font-size:17px;letter-spacing:.04em;color:var(--yolk);margin-bottom:6px;
}
.footer__note{
  margin-top:12px;max-width:30em;
  font-size:12px;line-height:1.7;color:rgba(247,244,236,.5);
}
.footer__bottom{
  max-width:var(--max-w);margin-inline:auto;
  border-top:1px solid rgba(247,244,236,.14);
  padding:18px 0 26px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:12px 24px;
}
.footer__legal{font-size:12px;letter-spacing:.04em;color:rgba(247,244,236,.55)}
.footer__links-inline{display:flex;flex-wrap:wrap;gap:4px 22px}
.footer__links-inline a{
  display:inline-flex;align-items:center;min-height:44px;
  font-size:12px;color:rgba(247,244,236,.72);
  transition:color .18s var(--ease);
}
.footer__links-inline a:hover{color:var(--kiwi)}

/* ---------- 10. 响应式 ---------- */
@media (max-width:1200px){
  .footer__grid{grid-template-columns:minmax(200px,1fr) minmax(0,1.8fr) minmax(200px,1fr);gap:32px}
}
@media (max-width:1100px){
  :root{--rail-w:88px}
  .rail{padding:16px 6px 18px}
  .nav__link{font-size:11px;padding:8px 2px}
  .rail__brand-name{font-size:12px}
  .footer__grid{grid-template-columns:1fr 1fr}
  .footer__contact{grid-column:1 / -1}
  .footer__cols{grid-column:1 / -1}
}
@media (max-width:900px){
  :root{--rail-w:0px}
  body{padding-left:0}
  #main-content{padding-top:var(--topbar-h)}
  .scroll-progress{left:0}

  .topbar__brand{display:inline-flex}
  .nav-toggle{display:inline-flex}

  .rail{
    position:fixed;top:auto;left:0;right:0;bottom:0;
    width:auto;height:auto;
    background:transparent;box-shadow:none;
    padding:0;overflow:visible;
    pointer-events:none;
  }
  .rail::after{display:none}
  .rail__brand,.rail__foot{display:none}

  .nav{
    pointer-events:auto;
    position:fixed;left:10px;right:10px;bottom:10px;
    width:auto;margin:0;
    max-height:72vh;overflow-y:auto;
    padding:18px;
    background:var(--purple);
    border-radius:28px;
    box-shadow:0 -10px 40px rgba(26,26,26,.3);
    transform:translateY(calc(100% + 28px));
    visibility:hidden;
    transition:transform .28s var(--ease),visibility .28s var(--ease);
  }
  .nav[data-open="true"]{transform:translateY(0);visibility:visible}
  .nav__list{flex-direction:row;flex-wrap:wrap;gap:10px}
  .nav__item{flex:1 1 44%;width:auto}
  .nav__link{
    flex-direction:row;justify-content:flex-start;gap:8px;
    min-height:52px;padding:0 16px;border-radius:999px;
    background:rgba(247,244,236,.08);
    color:var(--rice);font-size:14px;text-align:left;
  }
  .nav__link:hover{background:rgba(140,198,63,.24)}
  .nav__link[aria-current="page"]{background:var(--kiwi);color:var(--ink)}

  .span-3,.span-4,.span-5,.span-6,.span-7,.span-8{grid-column:span 12}
  .span-6--md{grid-column:span 12}
  .media-frame--cut{clip-path:polygon(0 0,100% 0,100% 100%,0 calc(100% - 36px))}
}
@media (max-width:680px){
  .topbar__index{display:none}
  .topbar__actions{gap:8px}
  .fav-btn{padding:0 12px}
  .fav-btn__label{
    position:absolute;width:1px;height:1px;overflow:hidden;
    clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;
  }
  .footer__grid{grid-template-columns:1fr;gap:32px}
  .footer__cols{grid-template-columns:1fr 1fr;gap:20px}
  .footer__contact{grid-column:auto}
  .footer__bottom{flex-direction:column;align-items:flex-start}
  .footer__links-inline{gap:0 18px}
}

/* ---------- 11. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .btn:hover,.btn:active{transform:none}
  .scroll-progress::after{transition:none}
}