/* AB赛场 · 共享站点套件 /assets/site.css
   炭灰长卷 + 土黄编号 + 电光青数据 + 熔岩橙关键动作 */

:root{
  --ink:#16181A;
  --charcoal:#23272B;
  --eave:#3A4247;
  --paper:#F3F0E9;
  --mist:#9AA3A8;
  --loess:#C9973F;
  --surge:#12E1CE;
  --deep-surge:#0B7F76;
  --lava:#FF6A2B;
  --brick:#A8422C;

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

  --shell:1280px;
  --gutter:clamp(1.5rem,5vw,4rem);
  --header-h:64px;
  --radius:14px;
  --radius-sm:9px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:320ms;
}

@media (min-width:920px){
  :root{--header-h:78px}
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5,h6,p,figure,blockquote{margin:0}
h1,h2,h3,h4{font-weight:900;letter-spacing:-.02em;line-height:1.15}
img,svg,video{display:block;max-width:100%}
a{color:var(--surge);text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0}
hr{border:0;height:1px;background:rgba(243,240,233,.1)}
::selection{background:var(--surge);color:#04211F}
:focus-visible{outline:2px solid var(--surge);outline-offset:3px;border-radius:3px}

/* ---------- 基础排版 ---------- */
.display{
  font-size:clamp(2.4rem,7vw,4.6rem);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.02;
}
.eyebrow{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--loess);
}
.lede{
  font-size:clamp(1.02rem,1.6vw,1.2rem);
  line-height:1.7;
  color:#DBD7CE;
  max-width:34em;
}
.prose{max-width:34em;color:#D8D3CA}
.prose p + p{margin-block-start:.9rem}
.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.04em;
}

/* ---------- 布局容器 ---------- */
.shell{
  width:min(calc(100% - var(--gutter)),var(--shell));
  margin-inline:auto;
}
.page-top{padding-block-start:calc(var(--header-h) + clamp(1.6rem,5vw,3.5rem))}
.section{padding-block:clamp(2.5rem,6vw,5rem)}
.section__head{display:grid;gap:.55rem;margin-block-end:clamp(1.2rem,3vw,2rem)}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;
  inset-block-start:.5rem;
  inset-inline-start:.5rem;
  z-index:300;
  padding:.7rem 1.1rem;
  background:var(--surge);
  color:#04211F;
  font-weight:700;
  font-size:.9rem;
  border-radius:var(--radius-sm);
  transform:translateY(-180%);
  transition:transform 180ms var(--ease);
}
.skip-link:focus{transform:none}

/* ---------- 头部 ---------- */
.site-header{
  position:fixed;
  inset-block-start:0;
  inset-inline:0;
  z-index:120;
  color:var(--paper);
  background:linear-gradient(180deg,rgba(15,17,19,.9) 0%,rgba(15,17,19,.58) 58%,rgba(15,17,19,0) 100%);
  transition:background 260ms var(--ease),box-shadow 260ms var(--ease);
}
.site-header[data-state="solid"]{
  background:rgba(29,33,36,.97);
  box-shadow:0 22px 48px -30px #000, inset 0 -1px 0 rgba(243,240,233,.1);
}
.header__sheen{
  position:absolute;
  inset-block-end:0;
  inset-inline-start:0;
  width:min(340px,44%);
  height:2px;
  background:linear-gradient(90deg,var(--loess),rgba(201,151,63,0));
  clip-path:polygon(0 0,100% 0,calc(100% - 12px) 100%,0 100%);
  pointer-events:none;
}
.header__inner{
  position:relative;
  width:min(calc(100% - var(--gutter)),var(--shell));
  margin-inline:auto;
  min-height:var(--header-h);
  display:flex;
  align-items:center;
  gap:clamp(.6rem,2vw,1.8rem);
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:.7rem;
  flex:0 0 auto;
  padding-block:.35rem;
  color:var(--paper);
}
.brand__mark{
  position:relative;
  display:block;
  width:30px;
  height:30px;
  flex:0 0 auto;
}
.brand__eave{
  position:absolute;
  inset:0;
  background:var(--loess);
  clip-path:polygon(0 0,100% 0,100% 44%,50% 100%,0 44%);
}
.brand__pulse{
  position:absolute;
  inset-block-end:-1px;
  inset-inline-end:-3px;
  width:9px;
  height:9px;
  border-radius:50%;
  background:var(--surge);
  animation:brand-pulse 2.6s ease-out infinite;
}
@keyframes brand-pulse{
  0%{box-shadow:0 0 0 0 rgba(18,225,206,.55)}
  70%,100%{box-shadow:0 0 0 10px rgba(18,225,206,0)}
}
.brand__text{display:flex;flex-direction:column;line-height:1.15}
.brand__name{font-weight:900;font-size:1.14rem;letter-spacing:-.01em}
.brand__line{
  display:none;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.08em;
  color:var(--mist);
}
.brand:hover .brand__name{color:var(--surge)}

/* 导航：移动优先为下拉面板 */
.nav{
  position:fixed;
  inset-block-start:var(--header-h);
  inset-inline:0;
  margin:0;
  padding:.7rem clamp(1rem,4vw,1.5rem) 1.4rem;
  background:rgba(29,33,36,.99);
  border-block-start:1px solid rgba(243,240,233,.1);
  box-shadow:0 34px 60px -34px #000;
  max-height:calc(100dvh - var(--header-h));
  overflow-y:auto;
  opacity:0;
  visibility:hidden;
  transform:translateY(-10px);
  transition:opacity 200ms var(--ease),transform 240ms var(--ease),visibility 0s linear 240ms;
}
.nav[data-open]{
  opacity:1;
  visibility:visible;
  transform:none;
  transition:opacity 200ms var(--ease),transform 240ms var(--ease);
}
.nav__list{display:flex;flex-direction:column;gap:.1rem;list-style:none}
.nav__item{position:relative;min-width:0}
.nav__link{
  position:relative;
  display:flex;
  align-items:baseline;
  gap:.55rem;
  padding:.9rem .4rem;
  font-size:1rem;
  font-weight:500;
  color:#DBD7CE;
  border-block-end:1px solid rgba(243,240,233,.08);
  transition:color 180ms var(--ease);
}
.nav__link::after{
  content:"";
  position:absolute;
  inset-inline:.4rem;
  inset-block-end:.34rem;
  height:2px;
  background:var(--surge);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform 220ms var(--ease);
}
.nav__idx{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.08em;
  color:var(--loess);
}
.nav__link:hover{color:var(--paper)}
.nav__link[aria-current="page"]{
  color:var(--surge);
  background:rgba(18,225,206,.07);
}
.nav__link[aria-current="page"] .nav__idx{color:var(--lava)}

body.is-nav-locked{overflow:hidden}

/* 右侧工具 */
.header__tools{
  display:flex;
  align-items:center;
  gap:.5rem;
  margin-inline-start:auto;
}
.recall{
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  padding:.5rem .85rem;
  border-radius:999px;
  border:1px solid rgba(255,106,43,.55);
  background:rgba(255,106,43,.1);
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  white-space:nowrap;
  transition:background 180ms var(--ease),color 180ms var(--ease),border-color 180ms var(--ease);
}
.recall:hover{background:rgba(255,106,43,.24)}
.recall[aria-expanded="true"]{background:var(--lava);border-color:var(--lava);color:#1A1005}
.recall__dot{
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--lava);
  animation:recall-blink 2.2s ease-in-out infinite;
}
.recall[aria-expanded="true"] .recall__dot{background:#1A1005;animation:none}
@keyframes recall-blink{0%,100%{opacity:1}50%{opacity:.28}}

.nav-toggle{
  display:inline-grid;
  grid-template-columns:16px auto;
  grid-template-rows:2px 2px;
  align-items:center;
  gap:4px 8px;
  padding:.55rem .65rem;
  border-radius:var(--radius-sm);
  border:1px solid rgba(243,240,233,.18);
  color:var(--paper);
}
.nav-toggle__bar{
  display:block;
  grid-column:1;
  width:16px;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:transform 220ms var(--ease);
}
.nav-toggle__bar:nth-child(1){grid-row:1}
.nav-toggle__bar:nth-child(2){grid-row:2}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1){transform:translateY(3px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2){transform:translateY(-3px) rotate(-45deg)}
.nav-toggle__label{
  grid-column:2;
  grid-row:1 / span 2;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
}

/* 回访面板 */
.recall-panel{
  position:absolute;
  inset-block-start:calc(var(--header-h) + .5rem);
  inset-inline-end:max(1rem,calc((100% - var(--shell)) / 2));
  width:min(430px,calc(100vw - 2rem));
  padding:1.15rem 1.2rem 1rem;
  background:linear-gradient(165deg,#272C30,#1A1D20 62%);
  border:1px solid rgba(255,106,43,.34);
  border-radius:var(--radius);
  box-shadow:0 34px 70px -34px #000;
  z-index:6;
}
.recall-panel::before{
  content:"";
  position:absolute;
  inset-block-start:-1px;
  inset-inline:1.2rem;
  height:3px;
  background:linear-gradient(90deg,var(--lava),var(--loess),transparent);
}
.recall-panel:not([hidden]){animation:panel-in 200ms var(--ease) both}
@keyframes panel-in{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}
.recall-panel__eyebrow{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--lava);
  margin-block-end:.3rem;
}
.recall-panel__title{
  font-size:1.02rem;
  font-weight:800;
  letter-spacing:-.01em;
  line-height:1.45;
  margin-block-end:.85rem;
}
.recall-panel__list{list-style:none;display:grid;gap:.55rem}
.recall-panel__row{
  display:grid;
  grid-template-columns:auto 1fr;
  gap:.7rem;
  padding:.6rem .7rem;
  background:rgba(243,240,233,.05);
  border-radius:var(--radius-sm);
  border-inline-start:2px solid var(--deep-surge);
}
.recall-panel__row:last-child{border-inline-start-color:var(--lava)}
.recall-panel__num{font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--surge)}
.recall-panel__body{display:flex;flex-direction:column;gap:.15rem}
.recall-panel__name{font-weight:700;font-size:.92rem;line-height:1.45}
.recall-panel__meta{font-family:var(--font-mono);font-size:11px;letter-spacing:.03em;color:var(--mist)}
.recall-panel__foot{display:flex;flex-wrap:wrap;gap:.4rem .9rem;margin-block-start:.9rem}
.recall-panel__link{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--surge);
  border-block-end:1px solid rgba(18,225,206,.4);
  padding-block-end:1px;
}
.recall-panel__link:hover{color:var(--paper);border-color:var(--paper)}

/* 进度条 */
.scroll-progress{
  position:absolute;
  inset-block-end:-1px;
  inset-inline:0;
  height:2px;
  background:rgba(243,240,233,.08);
  pointer-events:none;
}
.scroll-progress__bar{
  display:block;
  width:100%;
  height:100%;
  transform:scaleX(0);
  transform-origin:left center;
  background:linear-gradient(90deg,var(--loess),var(--lava) 55%,var(--surge));
  transition:transform 120ms linear;
}

/* 桌面导航 */
@media (min-width:920px){
  .brand__line{display:block}
  .nav{
    position:static;
    inset:auto;
    margin:0;
    margin-inline-start:auto;
    padding:0;
    background:none;
    border:0;
    box-shadow:none;
    max-height:none;
    overflow:visible;
    opacity:1;
    visibility:visible;
    transform:none;
  }
  .nav__list{flex-direction:row;align-items:center;gap:.1rem}
  .nav__link{
    padding:.55rem .62rem;
    font-size:.93rem;
    border-block-end:0;
    background:none;
  }
  .nav__link::after{inset-inline:.62rem;inset-block-end:.3rem}
  .nav__link:hover::after{transform:scaleX(1)}
  .nav__link[aria-current="page"]{background:none}
  .nav__link[aria-current="page"]::after{transform:scaleX(1);background:var(--lava)}
  .header__tools{margin-inline-start:.6rem}
  .nav-toggle{display:none}
  body.is-nav-locked{overflow:auto}
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-block-start:clamp(3rem,8vw,7rem);
  background:var(--ink);
  border-block-start:1px solid rgba(243,240,233,.09);
  color:var(--paper);
}
.footer__rail{
  height:6px;
  background:linear-gradient(90deg,var(--loess) 0 18%,var(--lava) 18% 25%,var(--deep-surge) 25% 62%,rgba(243,240,233,.08) 62%);
  clip-path:polygon(0 0,100% 0,100% 100%,0 58%);
}
.footer__inner{
  width:min(calc(100% - var(--gutter)),var(--shell));
  margin-inline:auto;
  padding-block:clamp(2.2rem,5vw,3.8rem) 1.5rem;
}
.footer__top{
  display:grid;
  gap:clamp(1.6rem,4vw,2.6rem);
  grid-template-columns:1fr;
}
.footer__brand{min-width:0}
.footer__logo{font-size:1.5rem;font-weight:900;letter-spacing:-.02em}
.footer__tagline{
  margin-block-start:.35rem;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.14em;
  color:var(--loess);
}
.footer__note{
  margin-block-start:.9rem;
  font-size:.86rem;
  line-height:1.75;
  color:var(--mist);
  max-width:34em;
}
.footer__col{min-width:0}
.footer__col-title{
  margin-block-end:.75rem;
  padding-block-end:.5rem;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--paper);
  border-block-end:1px solid rgba(243,240,233,.14);
}
.footer__links{list-style:none;display:grid;gap:.45rem}
.footer__link{
  display:inline-block;
  font-size:.92rem;
  color:#C9C4BA;
  transition:color 160ms var(--ease);
}
.footer__link:hover{color:var(--surge)}
.footer__tag{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.05em;
  color:var(--mist);
}
.footer__contact{
  display:grid;
  gap:.55rem;
  margin-block-start:clamp(1.8rem,4vw,2.6rem);
  padding-block-start:1.3rem;
  border-block-start:1px solid rgba(243,240,233,.1);
}
.footer__contact-item{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:.55rem;
  font-size:.88rem;
  color:#D5D0C7;
}
.footer__contact-key{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.18em;
  color:#E28A74;
  padding:.1rem .4rem;
  border:1px solid rgba(168,66,44,.55);
  border-radius:3px;
}
.footer__bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  align-items:baseline;
  gap:.4rem 1.4rem;
  margin-block-start:1.6rem;
  padding-block-start:1rem;
  border-block-start:1px solid rgba(243,240,233,.08);
}
.footer__legal,
.footer__year{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--mist);
}

@media (min-width:760px){
  .footer__top{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__contact{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:1024px){
  .footer__top{grid-template-columns:minmax(260px,1.3fr) repeat(3,minmax(0,1fr))}
}
@media (min-width:1100px){
  .footer__contact{grid-template-columns:auto auto minmax(0,1fr);align-items:baseline;gap:1.8rem}
}

/* ---------- 章节编号带 ---------- */
.band{
  display:grid;
  grid-template-columns:auto 1fr;
  align-items:baseline;
  gap:.6rem .9rem;
  padding-block-end:.8rem;
  border-block-end:1px solid rgba(243,240,233,.1);
}
.band__num{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.14em;
  color:#1A1508;
  background:var(--loess);
  padding:.15rem .5rem;
  border-radius:3px;
  justify-self:start;
}
.band__title{font-size:clamp(1.35rem,3vw,2.1rem);font-weight:900;letter-spacing:-.02em}
.band__note{
  grid-column:1 / -1;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--mist);
}

/* ---------- 面包屑 ---------- */
.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.45rem;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--mist);
}
.crumbs__link{color:var(--mist)}
.crumbs__link:hover{color:var(--surge)}
.crumbs__sep{color:var(--loess);opacity:.75}
.crumbs__current{color:var(--paper)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:.55rem;
  padding:.82rem 1.4rem;
  border-radius:999px;
  border:1px solid transparent;
  font-size:.95rem;
  font-weight:700;
  letter-spacing:.02em;
  transition:background 180ms var(--ease),color 180ms var(--ease),border-color 180ms var(--ease),transform 180ms var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn--lava{background:var(--lava);color:#1A1005}
.btn--lava:hover{background:#FF8450}
.btn--surge{background:var(--surge);color:#04211F}
.btn--surge:hover{background:#4BF0E1}
.btn--ghost{border-color:rgba(243,240,233,.3);color:var(--paper)}
.btn--ghost:hover{border-color:var(--surge);color:var(--surge)}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:.35rem;
  padding:.2rem .55rem;
  border-radius:3px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  background:rgba(243,240,233,.08);
  color:var(--mist);
}
.tag--loess{background:rgba(201,151,63,.18);color:#E4BE79}
.tag--surge{background:rgba(18,225,206,.14);color:var(--surge)}
.tag--lava{background:rgba(255,106,43,.16);color:#FF9A6D}
.tag--brick{background:rgba(168,66,44,.24);color:#E28A74}

/* ---------- 卡片 ---------- */
.card{
  position:relative;
  padding:clamp(1.1rem,2.4vw,1.6rem);
  background:var(--charcoal);
  border:1px solid rgba(243,240,233,.07);
  border-radius:var(--radius);
  overflow:hidden;
}
.card::before{
  content:"";
  position:absolute;
  inset-block-start:0;
  inset-inline:0;
  height:3px;
  background:linear-gradient(90deg,var(--loess),transparent 72%);
}
.card--accent{
  background:
    linear-gradient(158deg,rgba(18,225,206,.12),rgba(35,39,43,1) 62%);
}
.card--lava::before{background:linear-gradient(90deg,var(--lava),transparent 72%)}
.card__num{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--loess);
}
.card__title{
  margin-block:.45rem .3rem;
  font-size:1.15rem;
  font-weight:800;
  letter-spacing:-.01em;
  line-height:1.4;
}
.card__meta{font-family:var(--font-mono);font-size:12px;letter-spacing:.05em;color:var(--mist)}
.card__body{margin-block-start:.5rem;font-size:.95rem;color:#CFCAC1}

/* ---------- 网格 ---------- */
.grid{display:grid;gap:clamp(1rem,2.5vw,1.75rem)}
.grid--asym{grid-template-columns:1fr}
@media (min-width:980px){
  .grid--asym{grid-template-columns:repeat(12,minmax(0,1fr))}
  .grid__main{grid-column:span 7}
  .grid__rail{grid-column:span 3}
  .grid__num{
    grid-column:span 2;
    font-family:var(--font-mono);
    font-size:clamp(2rem,4vw,3rem);
    line-height:1;
    color:rgba(243,240,233,.12);
    letter-spacing:-.02em;
    justify-self:end;
  }
}
@media (max-width:979px){
  .grid__num{
    font-family:var(--font-mono);
    font-size:1.6rem;
    color:rgba(243,240,233,.14);
  }
}

/* ---------- 数据块 ---------- */
.stat{display:flex;flex-direction:column;gap:.2rem}
.stat__num{
  font-family:var(--font-mono);
  font-size:clamp(1.8rem,4vw,2.6rem);
  font-weight:700;
  line-height:1;
  letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;
  color:var(--surge);
}
.stat__label{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.14em;
  color:var(--mist);
}

/* ---------- 连看轨道 ---------- */
.rail{position:relative;padding-block:.4rem}
.rail__track{
  display:flex;
  gap:.75rem;
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  padding-block-end:.8rem;
  scrollbar-width:thin;
  scrollbar-color:var(--eave) transparent;
  -webkit-overflow-scrolling:touch;
}
.rail__track::-webkit-scrollbar{height:6px}
.rail__track::-webkit-scrollbar-thumb{background:var(--eave);border-radius:99px}
.rail__item{
  flex:0 0 clamp(220px,62%,300px);
  scroll-snap-align:start;
  padding:1rem 1.05rem;
  background:var(--charcoal);
  border-radius:12px;
  border-inline-start:3px solid var(--deep-surge);
}
.rail__item:first-child,
.rail__item:last-child{border-inline-start-color:var(--lava)}
.rail__time{font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--surge)}
.rail__teams{margin-block:.3rem;font-weight:800;font-size:1.02rem;letter-spacing:-.01em}
.rail__meta{font-size:.85rem;color:var(--mist)}

/* ---------- 筛选 ---------- */
.filter-bar{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem;padding-block:.4rem}
.filter-btn{
  padding:.5rem .95rem;
  border-radius:999px;
  border:1px solid rgba(243,240,233,.18);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--mist);
  transition:background 180ms var(--ease),border-color 180ms var(--ease),color 180ms var(--ease);
}
.filter-btn:hover{border-color:var(--surge);color:var(--paper)}
.filter-btn[aria-pressed="true"]{background:var(--surge);border-color:var(--surge);color:#04211F}
.filter-status{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--mist);
  margin-inline-start:auto;
}
[data-filter-item][hidden]{display:none}

/* ---------- 折叠时间轴 ---------- */
.timeline{
  display:grid;
  gap:.6rem;
  padding-inline-start:1.1rem;
  border-inline-start:1px solid rgba(243,240,233,.14);
}
.timeline__item{position:relative}
.timeline__item::before{
  content:"";
  position:absolute;
  inset-inline-start:-1.1rem;
  inset-block-start:.95rem;
  width:9px;
  height:9px;
  border-radius:50%;
  background:var(--loess);
  transform:translateX(-50%);
}
.timeline__season{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:1rem;
  width:100%;
  padding:.7rem .9rem;
  background:var(--charcoal);
  border-radius:var(--radius-sm);
  font-weight:700;
  font-size:.98rem;
  cursor:pointer;
  list-style:none;
}
.timeline__season::-webkit-details-marker{display:none}
.timeline__season::after{
  content:"+";
  font-family:var(--font-mono);
  font-size:1rem;
  color:var(--surge);
}
details[open] > .timeline__season::after{content:"\2212";color:var(--lava)}
.timeline__body{padding:.65rem .9rem .2rem;font-size:.94rem;color:#CFCAC1}

/* ---------- 媒体容器 ---------- */
.media{
  position:relative;
  isolation:isolate;
  overflow:hidden;
  border-radius:var(--radius);
  background:linear-gradient(142deg,var(--charcoal),var(--eave));
  aspect-ratio:var(--media-ratio,16 / 9);
}
.media::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  pointer-events:none;
  background:
    repeating-linear-gradient(115deg,rgba(18,225,206,.1) 0 2px,transparent 2px 14px),
    radial-gradient(120% 92% at 82% 0%,rgba(255,106,43,.24),transparent 62%);
}
.media::after{
  content:"";
  position:absolute;
  inset-inline:0;
  inset-block-end:0;
  height:42%;
  z-index:1;
  pointer-events:none;
  background:linear-gradient(0deg,rgba(22,24,26,.86),transparent);
}
.media__img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media__caption{
  position:absolute;
  inset-inline:0;
  inset-block-end:0;
  z-index:2;
  padding:.7rem clamp(.8rem,2vw,1.1rem);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--mist);
}
.media--wide{--media-ratio:21 / 9}
.media--tall{--media-ratio:3 / 4}
.media--square{--media-ratio:1 / 1}
.media--eave{clip-path:polygon(0 0,100% 0,100% calc(100% - 30px),0 100%)}

/* ---------- 显现动效 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity 200ms var(--ease),transform 320ms var(--ease);
}
[data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 响应式细调 ---------- */
@media (max-width:600px){
  .recall{font-size:11px;padding:.45rem .7rem;letter-spacing:.06em}
  .recall-panel{inset-inline:0.75rem;width:auto}
  .brand__name{font-size:1.05rem}
  .footer__bottom{flex-direction:column;align-items:flex-start}
}

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