/* =====================================================================
   博奥看台 · e-boao-sprint.com.cn
   共享样式表 /assets/site.css
   设计逻辑：框架式导航即页面边框 + 看台数据板 Bento + 纸张叠层印刷标签
   ===================================================================== */

/* ---------- 01 重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,dl,dt,dd,figure,blockquote{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,video,canvas{display:block;max-width:100%;height:auto}
button,input,select,textarea{font:inherit;color:inherit;background:none;border:0}
button{cursor:pointer}
a{color:inherit;text-decoration:none}
table{width:100%;border-collapse:collapse}
[hidden]{display:none !important}
:focus-visible{outline:3px solid var(--signal);outline-offset:3px;border-radius:2px}

/* ---------- 02 设计令牌 ---------- */
:root{
  --night:#0A1220;
  --stand:#142238;
  --green:#1F8A4C;
  --green-hi:#35B96A;
  --signal:#FF6B2C;
  --signal-soft:#FFB38A;
  --frost:#EAF4FF;
  --paper:#F6F1E7;
  --ink:#111827;
  --ink-soft:#4B5A6B;
  --page:#EFF3F9;
  --line-dark:rgba(234,244,255,.16);
  --line-light:rgba(17,24,39,.14);

  --font-display:'Barlow Condensed','Oswald','Noto Sans SC',sans-serif;
  --font-head:'Barlow','Noto Sans SC',sans-serif;
  --font-body:'Inter','Noto Sans SC',sans-serif;
  --font-data:'Roboto Mono','IBM Plex Mono',monospace;

  --fs-h1:clamp(2.8rem,6vw,5.5rem);
  --fs-h2:clamp(2rem,4vw,3.2rem);
  --fs-h3:clamp(1.3rem,2vw,1.8rem);
  --fs-sm:.82rem;

  --wrap:1240px;
  --gutter:clamp(1rem,4vw,2.5rem);
  --r:2px;
  --shadow:0 22px 45px -30px rgba(10,18,32,.6);
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 03 基础排版 ---------- */
body{
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  color:var(--ink);
  background:var(--page);
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:var(--font-head);font-weight:700;line-height:1.2;letter-spacing:-.01em}
h1{font-family:var(--font-display);font-weight:800;font-size:var(--fs-h1);line-height:1.02;letter-spacing:.01em}
h2{font-size:var(--fs-h2);line-height:1.12}
h3{font-size:var(--fs-h3)}
strong,b{font-weight:700}
small{font-size:var(--fs-sm)}
::selection{background:var(--signal);color:#180A03}
.display{font-family:var(--font-display);font-weight:800;line-height:1.02;letter-spacing:.01em}
.data-num{font-family:var(--font-data);font-weight:600;font-variant-numeric:tabular-nums}

/* ---------- 04 布局容器 ---------- */
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.framed{border-left:1px solid var(--line-light);border-right:1px solid var(--line-light)}
.framed--dark{border-color:var(--line-dark)}
.stack{display:grid;gap:var(--gap,1rem)}
.cluster{display:flex;flex-wrap:wrap;gap:.6rem;align-items:center}
.grid{display:grid;gap:clamp(1rem,2vw,1.6rem)}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(210px,1fr))}
.grid--split{grid-template-columns:minmax(0,1fr)}
@media (min-width:900px){
  .grid--split{grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr)}
  .grid--split--rev{grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr)}
}

/* ---------- 05 页头：框架式导航 ---------- */
.skip-link{
  position:fixed;top:.5rem;left:.5rem;z-index:200;
  transform:translateY(-160%);
  background:var(--signal);color:#180A03;
  font-family:var(--font-head);font-weight:700;font-size:.9rem;
  padding:.7rem 1.1rem;border:1px solid var(--night);border-radius:var(--r);
  transition:transform .18s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--night);color:var(--frost);
  box-shadow:0 14px 30px -24px rgba(10,18,32,.95);
}
.header-strip{background:var(--night);border-bottom:1px dashed var(--line-dark)}
.header-strip__inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:.3rem 1.5rem;padding-block:.45rem;
}
.header-strip__brand,.header-strip__meta{
  display:flex;align-items:center;gap:.5rem;
  font-family:var(--font-data);font-size:.74rem;letter-spacing:.09em;
  color:rgba(234,244,255,.66);
}
.header-strip__brand{color:var(--frost)}
.pulse-dot{
  width:.5rem;height:.5rem;border-radius:50%;background:var(--green-hi);
  animation:pulse 2.6s infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(53,185,106,.55)}
  70%{box-shadow:0 0 0 .5rem rgba(53,185,106,0)}
  100%{box-shadow:0 0 0 0 rgba(53,185,106,0)}
}

.header-frame{position:relative;background:var(--stand)}
.header-frame__inner{
  display:flex;align-items:center;gap:clamp(.75rem,2vw,1.75rem);
  min-height:4.6rem;
  border-left:1px solid var(--line-dark);
  border-right:1px solid var(--line-dark);
}

.brand{display:inline-flex;align-items:center;gap:.7rem;padding-block:.55rem;flex:0 0 auto}
.brand__mark{
  display:grid;place-items:center;width:2.6rem;height:2.6rem;
  background:var(--green);color:#fff;border:1px solid rgba(234,244,255,.45);
  border-radius:var(--r);font-family:var(--font-display);font-weight:800;font-size:1.35rem;
  box-shadow:inset 0 -7px 0 -4px rgba(255,107,44,.85);
}
.brand__text{display:flex;flex-direction:column;line-height:1.1}
.brand__name{font-family:var(--font-display);font-weight:800;font-size:1.5rem;letter-spacing:.05em;color:var(--frost)}
.brand__sub{font-family:var(--font-data);font-size:.68rem;letter-spacing:.2em;color:var(--signal-soft)}

.main-nav{margin-left:auto}
.main-nav__list{display:flex;align-items:stretch;flex-wrap:wrap;gap:.15rem}
.main-nav__item{display:flex}
.main-nav__link{
  position:relative;display:inline-flex;align-items:center;
  padding:.55rem .7rem;border:1px solid transparent;border-radius:var(--r);
  font-family:var(--font-head);font-weight:700;font-size:.95rem;
  color:rgba(234,244,255,.78);
  transition:color .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease);
}
.main-nav__link::after{
  content:"";position:absolute;left:.7rem;right:.7rem;bottom:.12rem;height:2px;
  background:var(--green-hi);transform:scaleX(0);transform-origin:left;
  transition:transform .2s var(--ease);
}
.main-nav__link:hover,.main-nav__link:focus-visible{color:var(--frost);background:rgba(234,244,255,.07)}
.main-nav__link:hover::after,.main-nav__link:focus-visible::after{transform:scaleX(1)}
.main-nav__link[aria-current="page"]{
  color:var(--night);background:var(--green-hi);border-color:var(--green-hi);
}
.main-nav__link[aria-current="page"]::after{transform:scaleX(0)}

.header-actions{display:flex;align-items:center;gap:.5rem;flex:0 0 auto}
.header-cta{white-space:nowrap}

.nav-toggle{
  display:none;align-items:center;gap:.5rem;
  padding:.5rem .7rem;border:1px solid var(--line-dark);border-radius:var(--r);
  background:rgba(234,244,255,.05);color:var(--frost);
  font-family:var(--font-head);font-weight:700;
  transition:background-color .18s var(--ease);
}
.nav-toggle:hover{background:rgba(234,244,255,.12)}
.nav-toggle__bars{position:relative;display:block;width:20px;height:2px;background:currentColor}
.nav-toggle__bars::before,.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:20px;height:2px;background:currentColor;
  transition:transform .2s var(--ease);
}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.nav-toggle__label{font-size:.8rem;letter-spacing:.06em}
.site-header[data-open] .nav-toggle__bars{background:transparent}
.site-header[data-open] .nav-toggle__bars::before{transform:translateY(6px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bars::after{transform:translateY(-6px) rotate(-45deg)}

.progress-rail{
  position:absolute;left:0;right:0;bottom:-1px;height:3px;
  background:rgba(234,244,255,.1);overflow:hidden;
}
.progress-rail__bar{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:left;
  background:linear-gradient(90deg,var(--green-hi),var(--signal));
}

/* ---------- 06 页脚 ---------- */
.site-footer{
  position:relative;margin-top:clamp(3rem,7vw,6rem);
  background:var(--night);color:var(--frost);
}
.footer-pitch{
  height:6px;
  background:
    repeating-linear-gradient(90deg,var(--green) 0 44px,transparent 44px 66px),
    var(--stand);
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) repeat(2,minmax(0,1fr)) minmax(0,1.2fr);
  gap:clamp(1.5rem,4vw,3.5rem);
  padding-block:clamp(2.5rem,5vw,4rem);
  border-left:1px solid var(--line-dark);
  border-right:1px solid var(--line-dark);
}
.footer-brand__line{
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(1.3rem,2.2vw,1.7rem);letter-spacing:.02em;
  color:var(--frost);max-width:24ch;
}
.footer-brand__note{margin-top:.75rem;max-width:36ch;font-size:.92rem;color:rgba(234,244,255,.66)}
.footer-brand .stamp{margin-top:1rem}
.footer-brand .btn{margin-top:1.2rem}
.footer-col__title{
  font-family:var(--font-data);font-size:.74rem;letter-spacing:.2em;
  color:var(--signal-soft);margin-bottom:.9rem;
}
.footer-list{display:grid;gap:.5rem}
.footer-list__link{
  display:inline-flex;align-items:center;gap:.45rem;
  font-size:.95rem;color:rgba(234,244,255,.82);
  transition:color .16s var(--ease),transform .16s var(--ease);
}
.footer-list__link::before{
  content:"";width:.4rem;height:.4rem;border-radius:1px;
  background:var(--green-hi);opacity:.5;transition:opacity .16s var(--ease);
}
.footer-list__link:hover,.footer-list__link:focus-visible{color:var(--frost);transform:translateX(3px)}
.footer-list__link:hover::before{opacity:1}
.footer-contact{display:grid;gap:1rem;align-content:start}
.footer-contact__item{display:grid;gap:.15rem}
.footer-contact__label{
  font-family:var(--font-data);font-size:.7rem;letter-spacing:.16em;
  color:rgba(234,244,255,.48);
}
.footer-contact__value{font-size:.95rem;color:var(--frost);word-break:break-word}
a.footer-contact__value{color:var(--green-hi)}
a.footer-contact__value:hover{color:var(--signal-soft)}
.footer-legal{background:rgba(10,18,32,.86);border-top:1px solid var(--line-dark)}
.footer-legal__inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:.4rem 1.5rem;padding-block:1.1rem;
  border-left:1px solid var(--line-dark);border-right:1px solid var(--line-dark);
}
.footer-legal__icp,.footer-legal__note{
  font-family:var(--font-data);font-size:.78rem;letter-spacing:.05em;
  color:rgba(234,244,255,.58);
}
.footer-legal a{color:var(--frost);text-decoration:underline;text-underline-offset:3px}

/* ---------- 07 通用按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  padding:.7rem 1.15rem;border:1px solid transparent;border-radius:var(--r);
  font-family:var(--font-head);font-weight:700;font-size:1rem;line-height:1.2;
  background:var(--green);color:#fff;
  transition:transform .16s var(--ease),background-color .18s var(--ease),
             color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.btn:hover{background:var(--green-hi);transform:translateY(-2px);box-shadow:var(--shadow)}
.btn:active{transform:translateY(0)}
.btn--signal{background:var(--signal);color:#180A03}
.btn--signal:hover{background:#FF8347}
.btn--ghost{background:transparent;color:var(--frost);border-color:var(--line-dark)}
.btn--ghost:hover{background:rgba(234,244,255,.1);color:var(--frost)}
.btn--outline{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn--outline:hover{background:var(--ink);color:var(--paper)}
.btn--paper{background:var(--paper);color:var(--ink);border-color:var(--line-light)}
.btn--paper:hover{background:#fff}
.btn--sm{padding:.48rem .82rem;font-size:.86rem}
.btn--lg{padding:.9rem 1.6rem;font-size:1.08rem}
.btn--block{width:100%}

/* ---------- 08 标签 / 印刷标签 / 提示 ---------- */
.kicker{
  display:inline-flex;align-items:center;gap:.5rem;
  font-family:var(--font-data);font-size:.74rem;letter-spacing:.2em;
  color:var(--green);
}
.kicker::before{content:"";width:1.6rem;height:2px;background:var(--signal)}
.kicker--dark{color:var(--green-hi)}
.stamp{
  display:inline-flex;align-items:center;gap:.4rem;
  padding:.32rem .6rem;border:1px dashed currentColor;border-radius:var(--r);
  font-family:var(--font-data);font-size:.74rem;letter-spacing:.12em;
  color:var(--ink-soft);
}
.stamp--signal{color:var(--signal)}
.stamp--paper{color:var(--paper);border-color:rgba(246,241,231,.5)}
.tag{
  display:inline-flex;align-items:center;gap:.35rem;
  padding:.22rem .55rem;border-radius:var(--r);
  font-family:var(--font-data);font-size:.74rem;letter-spacing:.06em;
  background:rgba(31,138,76,.12);color:var(--green);border:1px solid rgba(31,138,76,.28);
}
.tag--signal{background:rgba(255,107,44,.14);color:#B23B08;border-color:rgba(255,107,44,.34)}
.tag--outline{background:transparent;color:var(--ink-soft);border-color:var(--line-light)}
.tag--dark{background:rgba(53,185,106,.16);color:var(--green-hi);border-color:rgba(53,185,106,.34)}

/* ---------- 09 章节骨架 & 主题带 ---------- */
.section{padding-block:clamp(3rem,7vw,6rem)}
.section--tight{padding-block:clamp(2rem,4vw,3rem)}
.section--dark{background:var(--night);color:var(--frost)}
.section--stand{background:var(--stand);color:var(--frost)}
.section--paper{background:var(--paper)}
.section__head{display:grid;gap:.6rem;max-width:58ch;margin-bottom:clamp(1.5rem,3vw,2.5rem)}
.section__title{font-family:var(--font-display);font-weight:800;font-size:var(--fs-h2);line-height:1.08}
.section__lead{font-size:1.02rem;color:var(--ink-soft);max-width:60ch}
.section--dark .section__lead,.section--stand .section__lead{color:rgba(234,244,255,.74)}
.section--dark .kicker,.section--stand .kicker{color:var(--green-hi)}

.band{
  background:var(--stand);color:var(--frost);
  border-block:1px solid var(--line-dark);
  padding-block:clamp(.85rem,2vw,1.25rem);
}
.band__list{
  display:flex;align-items:center;gap:.6rem;
  overflow-x:auto;scrollbar-width:thin;
}
.band__item{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:.45rem;
  padding:.4rem .8rem;border:1px dashed var(--line-dark);border-radius:var(--r);
  font-family:var(--font-data);font-size:.78rem;letter-spacing:.08em;
  color:rgba(234,244,255,.8);
}
.band__item--on{border-style:solid;border-color:var(--green-hi);color:var(--frost);background:rgba(53,185,106,.14)}

/* ---------- 10 Bento 看板 ---------- */
.bento{
  display:grid;gap:clamp(.85rem,1.6vw,1.25rem);
  grid-template-columns:repeat(12,minmax(0,1fr));
}
.bento__cell{
  grid-column:span 12;position:relative;
  padding:clamp(1rem,2.2vw,1.6rem);
  background:var(--stand);color:var(--frost);
  border:1px solid var(--line-dark);border-radius:var(--r);
  box-shadow:var(--shadow);
}
.bento__cell--light{background:var(--frost);color:var(--ink);border-color:var(--line-light)}
.bento__cell--paper{background:var(--paper);color:var(--ink);border-color:var(--line-light)}
.bento__cell--focus{
  background:linear-gradient(145deg,var(--green) 0%,#14663a 100%);
  border-color:var(--green-hi);color:#fff;
}
.bento__cell--signal{background:var(--signal);color:#180A03;border-color:#180A03}
.bento__cell--tall{min-height:clamp(14rem,26vw,20rem)}
@media (min-width:640px){
  .bento__cell--6{grid-column:span 6}
  .bento__cell--4{grid-column:span 4}
  .bento__cell--8{grid-column:span 8}
}
@media (min-width:1024px){
  .bento__cell--3{grid-column:span 3}
  .bento__cell--4{grid-column:span 4}
  .bento__cell--5{grid-column:span 5}
  .bento__cell--6{grid-column:span 6}
  .bento__cell--7{grid-column:span 7}
  .bento__cell--8{grid-column:span 8}
  .bento__cell--9{grid-column:span 9}
}

/* ---------- 11 卡片 / 数字 ---------- */
.card{
  background:#fff;border:1px solid var(--line-light);border-radius:var(--r);
  padding:clamp(1rem,2vw,1.5rem);
}
.card--paper{background:var(--paper)}
.card--dark{background:var(--stand);color:var(--frost);border-color:var(--line-dark)}
.card__title{font-family:var(--font-head);font-weight:700;font-size:1.12rem;line-height:1.3}
.card__meta{font-family:var(--font-data);font-size:.76rem;letter-spacing:.09em;color:var(--ink-soft)}
.card--dark .card__meta{color:rgba(234,244,255,.6)}
.card__body{margin-top:.6rem}
.card__body p{color:var(--ink-soft);font-size:.96rem}
.card--dark .card__body p{color:rgba(234,244,255,.72)}

.stat{display:grid;gap:.2rem}
.stat__num{
  font-family:var(--font-data);font-weight:600;letter-spacing:-.02em;
  font-size:clamp(1.6rem,3vw,2.4rem);color:var(--green);
}
.stat__label{font-size:.85rem;color:var(--ink-soft)}
.stat--dark .stat__num{color:var(--green-hi)}
.stat--dark .stat__label{color:rgba(234,244,255,.68)}

.rule{height:1px;border:0;background:var(--line-light);margin-block:clamp(1.5rem,3vw,2.5rem)}
.rule--dark{background:var(--line-dark)}

/* ---------- 12 面包屑 / 侧栏 / 时间轴 ---------- */
.breadcrumbs{padding-block:1rem 0}
.breadcrumbs__list{
  display:flex;flex-wrap:wrap;align-items:center;gap:.4rem;
  font-family:var(--font-data);font-size:.78rem;letter-spacing:.05em;color:var(--ink-soft);
}
.breadcrumbs__link{color:var(--green)}
.breadcrumbs__link:hover,.breadcrumbs__link:focus-visible{color:var(--signal);text-decoration:underline;text-underline-offset:3px}
.breadcrumbs__sep{opacity:.45}
.breadcrumbs__item--current{color:var(--ink);font-weight:600}

.side-nav{display:grid;gap:.15rem}
.side-nav__link{
  display:block;padding:.35rem .7rem;border-left:2px solid var(--line-light);
  font-family:var(--font-data);font-size:.8rem;letter-spacing:.05em;color:var(--ink-soft);
  transition:color .16s var(--ease),border-color .16s var(--ease),background-color .16s var(--ease);
}
.side-nav__link:hover{color:var(--ink);background:var(--paper)}
.side-nav__link[aria-current="true"]{
  color:var(--green);border-color:var(--signal);background:var(--paper);font-weight:600;
}

.rail{border-left:2px solid var(--line-light);padding-left:1.5rem}
.rail__item{position:relative;padding-bottom:1.4rem}
.rail__item::before{
  content:"";position:absolute;left:calc(-1.5rem - 7px);top:.45rem;
  width:12px;height:12px;border-radius:50%;
  background:var(--frost);border:2px solid var(--green);
}
.rail__time{font-family:var(--font-data);font-size:.76rem;letter-spacing:.08em;color:var(--ink-soft)}

/* ---------- 13 长文 ---------- */
.prose{max-width:72ch;font-size:1.04rem;line-height:1.8}
.prose > * + *{margin-top:1.1rem}
.prose h2{margin-top:2.2rem;font-size:var(--fs-h3)}
.prose h3{margin-top:1.7rem;font-size:1.15rem}
.prose ul{display:grid;gap:.55rem}
.prose li{position:relative;padding-left:1.4rem}
.prose li::before{
  content:"";position:absolute;left:0;top:.62em;
  width:.5rem;height:.5rem;border-radius:1px;background:var(--green-hi);
}
.prose a{color:var(--green);text-decoration:underline;text-underline-offset:3px}
.prose a:hover{color:var(--signal)}
.section--dark .prose,.section--stand .prose{color:rgba(234,244,255,.86)}

/* ---------- 14 图片容器 ---------- */
.media-frame{
  position:relative;overflow:hidden;border-radius:var(--r);
  border:1px solid var(--line-light);
  background:linear-gradient(145deg,var(--stand),var(--night));
  isolation:isolate;
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame--16x9{aspect-ratio:16/9}
.media-frame--4x3{aspect-ratio:4/3}
.media-frame--1x1{aspect-ratio:1/1}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--placeholder{
  background-image:
    repeating-linear-gradient(115deg,rgba(53,185,106,.16) 0 14px,transparent 14px 34px),
    radial-gradient(circle at 72% 26%,rgba(255,107,44,.32),transparent 62%),
    linear-gradient(145deg,var(--stand),var(--night));
}
.media-frame__caption{
  position:absolute;left:0;right:0;bottom:0;z-index:2;
  padding:.65rem .85rem;
  font-family:var(--font-data);font-size:.74rem;letter-spacing:.06em;
  color:var(--frost);
  background:linear-gradient(180deg,rgba(10,18,32,0),rgba(10,18,32,.88));
}
.media-frame__tag{position:absolute;top:.6rem;left:.6rem;z-index:2}

/* ---------- 15 切换器 & 筛选 ---------- */
.toggle-group{
  display:inline-flex;gap:.25rem;padding:.25rem;
  background:var(--paper);border:1px solid var(--line-light);border-radius:var(--r);
}
.toggle-group__btn{
  padding:.45rem .95rem;border-radius:var(--r);
  font-family:var(--font-head);font-weight:700;font-size:.9rem;color:var(--ink-soft);
  transition:background-color .16s var(--ease),color .16s var(--ease);
}
.toggle-group__btn:hover{color:var(--ink);background:rgba(17,24,39,.05)}
.toggle-group__btn[aria-pressed="true"]{background:var(--night);color:var(--frost)}

.filter-bar{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem}
.filter-chip{
  padding:.4rem .85rem;border:1px solid var(--line-light);border-radius:999px;
  font-family:var(--font-head);font-weight:700;font-size:.85rem;color:var(--ink-soft);
  transition:background-color .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
}
.filter-chip:hover{border-color:var(--green);color:var(--green)}
.filter-chip[aria-pressed="true"]{background:var(--green);border-color:var(--green);color:#fff}

/* ---------- 16 滚动显现 ---------- */
[data-reveal]{opacity:0;transform:translateY(8px);transition:opacity .24s var(--ease),transform .24s var(--ease)}
[data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 17 断点适配 ---------- */
@media (max-width:1080px){
  .main-nav__link{font-size:.9rem;padding:.5rem .5rem}
  .brand__name{font-size:1.34rem}
}
@media (max-width:960px){
  .nav-toggle{display:inline-flex}
  .header-cta{display:none}
  .header-frame__inner{min-height:4rem;border-left:0;border-right:0}
  .brand__sub{display:none}
  .main-nav{
    position:absolute;left:0;right:0;top:100%;z-index:70;
    margin:0;padding:1rem var(--gutter) 1.4rem;
    background:var(--stand);
    border-top:1px solid var(--line-dark);
    border-bottom:1px solid var(--line-dark);
    box-shadow:0 26px 40px -26px rgba(0,0,0,.9);
    max-height:calc(100vh - 7rem);overflow-y:auto;
    display:none;
  }
  .site-header[data-open] .main-nav{display:block;animation:nav-in .22s var(--ease)}
  .main-nav__list{flex-direction:column;gap:0}
  .main-nav__item{display:block}
  .main-nav__link{
    width:100%;justify-content:space-between;padding:.85rem .4rem;
    border-bottom:1px dashed var(--line-dark);border-radius:0;
  }
  .main-nav__link::after{display:none}
  .main-nav__link[aria-current="page"]{border-bottom-color:var(--green-hi)}
  body.nav-open{overflow:hidden}
}
@keyframes nav-in{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}
@media (max-width:1024px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid > .footer-brand{grid-column:1 / -1}
}
@media (max-width:620px){
  body{font-size:16.5px}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:1.75rem}
  .footer-brand__line{max-width:none}
  .footer-legal__inner{justify-content:flex-start}
}

/* ---------- 18 减少动效 ---------- */
@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;
  }
  [data-reveal]{opacity:1;transform:none}
}