/* ============================================================
   绿茵体育 · 共享外壳样式 /assets/site.css
   夜场战术板：草皮绿主场 + 荧光柠檬黄高亮 + 粗野主义框架
   ============================================================ */

/* ---------- 1. 设计变量 ---------- */
:root{
  --turf:#0B6E3C;
  --turf-mid:#1E9E63;
  --lemon:#D8F34A;
  --lemon-mist:#EEF9B8;
  --ink:#052E1C;
  --night:#081A12;
  --paper:#F7F5EF;
  --whistle:#FF7A3D;
  --stand:#A8B5AC;

  --bd-w:3px;
  --bd:var(--bd-w) solid var(--ink);
  --bd-thin:2px solid var(--ink);
  --bd-fade:2px solid rgba(5,46,28,.16);

  --shadow:6px 6px 0 var(--ink);
  --shadow-sm:4px 4px 0 var(--ink);
  --shadow-lift:9px 9px 0 var(--ink);

  --wrap:1240px;
  --pad:clamp(16px,4vw,48px);
  --header-h:74px;

  --f-display:"Archivo Narrow","Arial Narrow","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --f-body:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --f-mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Liberation Mono","Courier New",monospace;

  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 2. Reset 与基础 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-h) + 18px);
}
body{
  margin:0;
  min-height:100vh;
  background-color:var(--paper);
  background-image:repeating-linear-gradient(90deg,rgba(11,110,60,.045) 0 58px,rgba(11,110,60,0) 58px 116px);
  color:var(--ink);
  font-family:var(--f-body);
  font-size:16px;
  line-height:1.6;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before,
body::after{
  content:"";
  position:fixed;
  top:0;
  bottom:0;
  width:3px;
  z-index:1;
  pointer-events:none;
  background:linear-gradient(180deg,var(--lemon) 0%,var(--turf-mid) 34%,var(--turf) 70%,var(--ink) 100%);
  opacity:.85;
}
body::before{left:0}
body::after{right:0}

h1,h2,h3,h4,h5,h6{
  margin:0;
  font-family:var(--f-display);
  font-weight:700;
  font-stretch:condensed;
  line-height:1.1;
  letter-spacing:-.01em;
  overflow-wrap:break-word;
}
h1{font-size:clamp(38px,7vw,86px);line-height:1.03}
h2{font-size:clamp(26px,4vw,46px)}
h3{font-size:clamp(19px,2.2vw,26px);line-height:1.2}
h4{font-size:clamp(16px,1.6vw,20px);line-height:1.25}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
img,svg,video{display:block;max-width:100%;height:auto}
::selection{background:var(--lemon);color:var(--ink)}

:focus-visible{outline:3px solid var(--turf-mid);outline-offset:3px}
.site-header :focus-visible,
.site-footer :focus-visible,
.section--dark :focus-visible,
.section--turf :focus-visible,
.to-top:focus-visible{outline-color:var(--lemon)}

.skip-link{
  position:fixed;
  left:12px;
  top:-90px;
  z-index:200;
  padding:12px 20px;
  background:var(--lemon);
  color:var(--ink);
  border:var(--bd-thin);
  box-shadow:var(--shadow-sm);
  font-weight:700;
  letter-spacing:.06em;
  transition:top .18s var(--ease);
}
.skip-link:focus{top:12px}

/* ---------- 3. 容器与文字工具 ---------- */
.wrap{width:min(100% - var(--pad)*2,var(--wrap));margin-inline:auto}
.wrap--tight{width:min(100% - var(--pad)*2,880px);margin-inline:auto}
.wrap--wide{width:min(100% - var(--pad)*2,1440px);margin-inline:auto}

.index-text{
  font-family:var(--f-mono);
  font-size:12px;
  line-height:1.4;
  letter-spacing:.2em;
  text-transform:uppercase;
  font-variant-numeric:tabular-nums;
}
.num{font-family:var(--f-mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.sr-only{
  position:absolute;
  width:1px;height:1px;
  margin:-1px;padding:0;
  overflow:hidden;
  clip:rect(0 0 0 0);
  white-space:nowrap;
  border:0;
}

.prose{
  display:grid;
  gap:1.05em;
  max-width:70ch;
  font-size:16.5px;
  line-height:1.75;
  color:rgba(5,46,28,.86);
}
.prose a{color:var(--turf);font-weight:600;border-bottom:2px solid var(--turf)}
.prose a:hover{background:var(--lemon-mist)}
.prose ul{display:grid;gap:.55em;padding-left:1.15em}
.prose ul li{position:relative}
.prose ul li::before{
  content:"";
  position:absolute;
  left:-1.05em;
  top:.68em;
  width:7px;height:7px;
  background:var(--turf-mid);
}
.section--dark .prose,
.section--turf .prose{color:rgba(247,245,239,.84)}
.section--dark .prose a,
.section--turf .prose a{color:var(--lemon);border-bottom-color:rgba(216,243,74,.55)}
.section--dark .prose ul li::before,
.section--turf .prose ul li::before{background:var(--lemon)}

/* ---------- 4. 章节与背景分区 ---------- */
.section{
  position:relative;
  padding-block:clamp(44px,7vw,100px);
}
.section--paper{background:var(--paper);color:var(--ink)}
.section--turf{
  color:var(--paper);
  background-color:var(--turf);
  background-image:
    radial-gradient(120% 90% at 88% 6%,rgba(216,243,74,.18),rgba(216,243,74,0) 58%),
    linear-gradient(155deg,var(--turf) 0%,var(--turf) 42%,var(--ink) 100%);
}
.section--dark{background:var(--night);color:var(--paper)}
.section--lemon{
  color:var(--ink);
  background-image:linear-gradient(160deg,var(--lemon) 0%,var(--lemon-mist) 100%);
}

.section-head{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  align-items:end;
  gap:clamp(10px,2vw,26px);
  padding-bottom:14px;
  margin-bottom:clamp(22px,4vw,44px);
  border-bottom:3px solid currentColor;
}
.section-num{
  font-family:var(--f-mono);
  font-size:12px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--turf-mid);
  padding-bottom:.35em;
}
.section--dark .section-num,
.section--turf .section-num{color:var(--lemon)}
.section-title{margin:0}
.section-lead{
  grid-column:2;
  margin-top:8px;
  max-width:60ch;
  font-size:15px;
  line-height:1.65;
  color:rgba(5,46,28,.7);
}
.section--dark .section-lead,
.section--turf .section-lead{color:rgba(247,245,239,.72)}

.divider{
  height:3px;
  margin-block:clamp(24px,4vw,48px);
  border:0;
  background:currentColor;
  opacity:.16;
}

/* ---------- 5. 网格与节奏 ---------- */
.grid{display:grid;gap:clamp(14px,2vw,24px)}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid-auto{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.stack{display:grid;gap:clamp(14px,2vw,22px)}
.stack-sm{display:grid;gap:10px}

/* ---------- 6. 卡片 ---------- */
.card{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:12px;
  padding:clamp(16px,2.2vw,26px);
  background:var(--paper);
  color:var(--ink);
  border:var(--bd);
  box-shadow:var(--shadow);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease);
}
.card:hover{transform:translate(-3px,-3px);box-shadow:var(--shadow-lift)}
.card-title{margin:0;font-size:clamp(18px,1.9vw,23px)}
.card-text{font-size:14.5px;line-height:1.65;color:rgba(5,46,28,.76)}
.card-meta{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  align-items:center;
  margin-top:auto;
  padding-top:12px;
  border-top:2px dashed rgba(5,46,28,.18);
}
.card--lemon{background:var(--lemon)}
.card--dark{
  background:var(--night);
  color:var(--paper);
  box-shadow:6px 6px 0 var(--turf);
}
.card--dark .card-text{color:rgba(247,245,239,.76)}
.card--dark .card-meta{border-top-color:rgba(247,245,239,.22)}
.card--dark:hover{box-shadow:9px 9px 0 var(--turf)}

/* ---------- 7. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  font-family:var(--f-body);
  font-size:14px;
  font-weight:700;
  letter-spacing:.06em;
  line-height:1.2;
  border:2px solid var(--ink);
  background:var(--paper);
  color:var(--ink);
  transition:transform .16s var(--ease),box-shadow .16s var(--ease),background-color .16s ease,color .16s ease,border-color .16s ease;
}
.btn:hover{transform:translate(-2px,-2px);box-shadow:var(--shadow-sm)}
.btn:active{transform:none;box-shadow:none}
.btn-solid{background:var(--lemon);color:var(--ink);box-shadow:var(--shadow-sm)}
.btn-solid:hover{box-shadow:var(--shadow)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-orange{background:var(--whistle);color:var(--paper);border-color:var(--ink)}
.site-header .btn{border-color:rgba(247,245,239,.42);background:transparent;color:var(--paper)}
.site-header .btn:hover{background:rgba(216,243,74,.12);border-color:var(--lemon);color:var(--lemon);box-shadow:none;transform:none}
.site-header .btn-solid{background:var(--lemon);color:var(--ink);border-color:var(--lemon)}
.site-header .btn-solid:hover{background:var(--lemon-mist);color:var(--ink);border-color:var(--lemon-mist);transform:translate(-2px,-2px);box-shadow:3px 3px 0 rgba(216,243,74,.4)}

/* ---------- 8. 标记与数据块 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  background:var(--lemon-mist);
  color:var(--ink);
  border:2px solid var(--ink);
  font-family:var(--f-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
}
.tag--lemon{background:var(--lemon)}
.tag--orange{background:var(--whistle);color:var(--paper)}
.tag--ghost{background:transparent;border-color:currentColor;color:inherit}

.round-badge{
  display:inline-grid;
  place-items:center;
  min-width:54px;
  padding:9px 10px;
  background:var(--lemon);
  color:var(--ink);
  border:3px solid var(--ink);
  box-shadow:4px 4px 0 var(--ink);
  font-family:var(--f-mono);
  font-size:18px;
  font-weight:700;
  line-height:1;
  font-variant-numeric:tabular-nums;
}
.round-badge--dark{
  background:var(--ink);
  color:var(--lemon);
  border-color:var(--lemon);
  box-shadow:4px 4px 0 var(--turf);
}

.stat{
  display:grid;
  gap:5px;
  padding-left:14px;
  border-left:3px solid var(--turf-mid);
}
.section--dark .stat,
.section--turf .stat{border-left-color:var(--lemon)}
.stat-value{
  font-family:var(--f-mono);
  font-size:clamp(24px,3.2vw,38px);
  font-weight:700;
  line-height:1;
  font-variant-numeric:tabular-nums;
}
.stat-label{
  font-family:var(--f-mono);
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--stand);
}

/* ---------- 9. 图片容器（页面阶段放图） ---------- */
.media-frame{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16 / 9;
  overflow:hidden;
  border:var(--bd);
  background-color:var(--turf);
  background-image:
    repeating-linear-gradient(115deg,rgba(247,245,239,.10) 0 12px,rgba(247,245,239,0) 12px 26px),
    linear-gradient(150deg,var(--turf-mid),var(--ink));
}
.media-frame > img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(8,26,18,0) 45%,rgba(8,26,18,.62) 100%);
}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame--tall{aspect-ratio:4 / 5}
.media-frame--plain::after{display:none}
.media-caption{
  display:block;
  margin-top:10px;
  font-family:var(--f-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--stand);
}

/* ---------- 10. 面包屑 / 提示 / 索引 / 目录 ---------- */
.breadcrumb{margin-bottom:clamp(18px,3vw,34px)}
.breadcrumb ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-family:var(--f-mono);
  font-size:11.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--stand);
}
.breadcrumb a{border-bottom:2px solid transparent;transition:color .16s ease,border-color .16s ease}
.breadcrumb a:hover{color:var(--turf);border-bottom-color:var(--turf)}
.breadcrumb [aria-current="page"]{color:var(--turf)}
.crumb-sep{color:rgba(168,181,172,.7)}
.section--dark .breadcrumb ol,
.section--turf .breadcrumb ol{color:rgba(247,245,239,.62)}
.section--dark .breadcrumb a:hover,
.section--turf .breadcrumb a:hover{color:var(--lemon);border-bottom-color:var(--lemon)}
.section--dark .breadcrumb [aria-current="page"],
.section--turf .breadcrumb [aria-current="page"]{color:var(--lemon)}

.callout{
  display:grid;
  gap:8px;
  padding:18px 20px;
  background:var(--paper);
  color:var(--ink);
  border:var(--bd-thin);
  border-left:8px solid var(--whistle);
  box-shadow:var(--shadow-sm);
}
.callout-title{
  font-family:var(--f-mono);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--whistle);
}
.callout-text{font-size:14.5px;line-height:1.7}

.index-list{display:grid}
.index-list li{border-bottom:2px solid rgba(5,46,28,.12)}
.index-list a{
  display:flex;
  gap:16px;
  align-items:baseline;
  justify-content:space-between;
  padding:12px 4px;
  font-size:15px;
  transition:background-color .16s ease;
}
.index-list a:hover{background:var(--lemon-mist)}
.index-key{
  font-family:var(--f-mono);
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--stand);
}

.toc{
  display:grid;
  gap:4px;
  padding:16px 0;
  border-top:3px solid currentColor;
  border-bottom:3px solid currentColor;
}
.toc-link{
  display:flex;
  gap:12px;
  align-items:baseline;
  padding:7px 12px;
  border-left:3px solid transparent;
  font-size:14px;
  opacity:.68;
  transition:opacity .16s ease,border-color .16s ease,background-color .16s ease;
}
.toc-link:hover{opacity:1;background:rgba(216,243,74,.14)}
.toc-link[aria-current]{opacity:1;font-weight:700;border-left-color:var(--turf-mid)}
.section--dark .toc-link[aria-current],
.section--turf .toc-link[aria-current]{border-left-color:var(--lemon);color:var(--lemon)}

/* ---------- 11. 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:var(--ink);
  color:var(--paper);
  box-shadow:0 6px 0 rgba(5,46,28,.14);
}
.header-frame{
  width:min(100% - var(--pad)*2,var(--wrap));
  margin-inline:auto;
  display:flex;
  align-items:center;
  gap:clamp(10px,1.6vw,24px);
  min-height:var(--header-h);
  padding-block:10px;
}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.brand-mark{
  width:34px;
  height:34px;
  flex:0 0 auto;
  border:3px solid var(--paper);
  background-color:var(--lemon);
  background-image:linear-gradient(135deg,rgba(5,46,28,0) 43%,var(--ink) 43%,var(--ink) 57%,rgba(5,46,28,0) 57%);
}
.brand-text{display:flex;flex-direction:column;gap:2px}
.brand-name{
  font-family:var(--f-display);
  font-weight:700;
  font-size:20px;
  line-height:1.1;
  letter-spacing:.02em;
}
.brand-line{
  font-family:var(--f-mono);
  font-size:10px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--lemon);
}

.site-nav{
  display:flex;
  align-items:center;
  gap:clamp(6px,1.2vw,18px);
  margin-left:auto;
  min-width:0;
}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-list a{
  display:inline-block;
  padding:9px 11px;
  font-size:14px;
  letter-spacing:.07em;
  white-space:nowrap;
  color:rgba(247,245,239,.8);
  border-bottom:3px solid transparent;
  transition:color .16s ease,background-color .16s ease,border-color .16s ease;
}
.nav-list a:hover{color:var(--lemon);background:rgba(216,243,74,.1)}
.nav-list a[aria-current="page"]{color:var(--lemon);border-bottom-color:var(--lemon)}

.nav-quick{
  display:flex;
  align-items:center;
  gap:8px;
  padding-left:clamp(6px,1.2vw,16px);
  border-left:2px solid rgba(247,245,239,.18);
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  margin-left:auto;
  padding:10px 14px;
  border:2px solid rgba(247,245,239,.4);
  color:var(--paper);
  font-family:var(--f-mono);
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  transition:border-color .16s ease,color .16s ease,background-color .16s ease;
}
.nav-toggle:hover{border-color:var(--lemon);color:var(--lemon)}
.nav-toggle[aria-expanded="true"]{border-color:var(--lemon);color:var(--lemon);background:rgba(216,243,74,.12)}
.nav-toggle-bars{display:grid;gap:3px;width:18px}
.nav-toggle-bars span{display:block;height:2px;background:currentColor;transition:transform .18s var(--ease),opacity .18s ease}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

.round-progress{
  position:relative;
  height:5px;
  background:rgba(247,245,239,.16);
  overflow:hidden;
}
.round-progress::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:2;
  pointer-events:none;
  background-image:repeating-linear-gradient(90deg,rgba(8,26,18,.55) 0 1px,rgba(8,26,18,0) 1px 60px);
}
.round-progress-fill{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--turf-mid),var(--lemon));
  transition:width .1s linear;
}

/* ---------- 12. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(40px,7vw,96px);
  background:var(--night);
  color:var(--paper);
  border-top:3px solid var(--lemon);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    radial-gradient(90% 70% at 10% 0%,rgba(11,110,60,.55),rgba(11,110,60,0) 62%),
    repeating-linear-gradient(90deg,rgba(247,245,239,.035) 0 62px,rgba(247,245,239,0) 62px 124px);
}
.footer-inner{
  position:relative;
  z-index:1;
  width:min(100% - var(--pad)*2,var(--wrap));
  margin-inline:auto;
  padding-block:clamp(38px,6vw,72px) clamp(18px,3vw,30px);
  display:grid;
  grid-template-columns:minmax(0,1.25fr) minmax(0,.95fr) minmax(0,1.1fr);
  gap:clamp(26px,4vw,56px);
}
.footer-brand{min-width:0}
.footer-brand-name{
  margin:0;
  font-family:var(--f-display);
  font-weight:700;
  font-stretch:condensed;
  font-size:clamp(34px,5vw,58px);
  line-height:.97;
  letter-spacing:-.02em;
}
.footer-brand-name span{color:var(--lemon)}
.footer-brand-sub{
  margin-top:14px;
  font-family:var(--f-mono);
  font-size:11px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--stand);
}
.footer-note{
  margin-top:20px;
  max-width:36ch;
  font-size:13.5px;
  line-height:1.75;
  color:rgba(247,245,239,.72);
}
.footer-index,.footer-contact{min-width:0}
.footer-heading{
  margin:0 0 16px;
  padding-bottom:10px;
  border-bottom:2px solid rgba(216,243,74,.4);
  font-family:var(--f-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--lemon);
}
.footer-links{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:6px 20px;
  font-size:14px;
}
.footer-links a{
  display:inline-block;
  padding:3px 0;
  color:rgba(247,245,239,.85);
  border-bottom:2px solid transparent;
  transition:color .16s ease,border-color .16s ease;
}
.footer-links a:hover{color:var(--lemon);border-bottom-color:var(--lemon)}
.footer-contact-list{display:grid;gap:14px;font-size:13.5px;line-height:1.6}
.footer-contact-key{
  display:block;
  font-family:var(--f-mono);
  font-size:10px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--stand);
}
.footer-contact-val{
  display:block;
  margin-top:3px;
  color:var(--paper);
  word-break:break-word;
}
.footer-bottom{
  position:relative;
  z-index:1;
  width:min(100% - var(--pad)*2,var(--wrap));
  margin-inline:auto;
  padding:16px 0 26px;
  border-top:2px solid rgba(247,245,239,.16);
  display:flex;
  flex-wrap:wrap;
  gap:10px 26px;
  align-items:center;
  justify-content:space-between;
  font-family:var(--f-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--stand);
}
.footer-icp{color:var(--lemon)}
.footer-bottom [data-year]{font-variant-numeric:tabular-nums}

/* ---------- 13. 返回顶部 ---------- */
.to-top{
  position:fixed;
  right:clamp(14px,3vw,32px);
  bottom:clamp(14px,3vw,32px);
  z-index:70;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:2px;
  width:56px;
  height:56px;
  padding:0;
  background:var(--lemon);
  color:var(--ink);
  border:3px solid var(--ink);
  box-shadow:5px 5px 0 var(--ink);
  font-family:var(--f-mono);
  font-size:10px;
  letter-spacing:.12em;
  text-transform:uppercase;
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s linear,background-color .16s ease;
}
.to-top[data-visible]{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--lemon-mist)}
.to-top-arrow{font-size:16px;line-height:1}
.to-top-text{line-height:1}

/* ---------- 14. 内容显现 ---------- */
html.js-ready [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .52s var(--ease),transform .52s var(--ease);
}
html.js-ready [data-reveal].is-in{opacity:1;transform:none}

/* ---------- 15. 响应式 ---------- */
@media (max-width:1080px){
  :root{--header-h:64px}
  body::before,body::after{display:none}

  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    margin:0;
    padding:14px var(--pad) 26px;
    background:var(--night);
    border-bottom:3px solid var(--lemon);
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    transform:translateY(-12px);
    transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s linear;
  }
  .site-nav[data-open]{opacity:1;visibility:visible;transform:none}

  .nav-list{flex-direction:column;align-items:stretch;counter-reset:nav-index}
  .nav-list > li{counter-increment:nav-index;border-bottom:1px solid rgba(168,181,172,.22)}
  .nav-list a{
    display:flex;
    align-items:baseline;
    gap:14px;
    padding:15px 2px;
    font-size:18px;
    border-bottom:0;
  }
  .nav-list a::before{
    content:counter(nav-index,decimal-leading-zero);
    font-family:var(--f-mono);
    font-size:11px;
    letter-spacing:.18em;
    color:var(--lemon);
  }
  .nav-list a[aria-current="page"]{background:rgba(216,243,74,.12);padding-left:12px}

  .nav-quick{
    margin:20px 0 0;
    padding:0;
    border-left:0;
    flex-direction:column;
    align-items:stretch;
    gap:10px;
  }
  .nav-quick .btn{width:100%;padding:14px 18px}

  .footer-inner{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1 / -1}
}

@media (max-width:900px){
  .grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .section-head{grid-template-columns:minmax(0,1fr);gap:6px}
  .section-num{padding-bottom:0}
  .section-lead{grid-column:1}
}

@media (max-width:680px){
  .grid-2,.grid-3,.grid-4,.grid-auto{grid-template-columns:minmax(0,1fr)}
  .footer-inner{grid-template-columns:minmax(0,1fr)}
  .footer-brand{grid-column:auto}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .round-badge{min-width:48px;font-size:16px}
  .to-top{width:50px;height:50px}
}

/* ---------- 16. 降低动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .card:hover{transform:none;box-shadow:var(--shadow)}
  .btn:hover{transform:none}
  .to-top{transform:none}
  html.js-ready [data-reveal]{opacity:1;transform:none}
}