/* ==========================================================================
   新2足球备用 · 共享样式表 /assets/site.css
   夜场灯光 + 战术板资料站：侧边轨道 / 状态条 / 墨绿页脚 / 切角面板
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --green-deep:#0E3B2E;
  --green-night:#07211A;
  --ink-blue:#101C2B;
  --paper:#F2EFE6;
  --lime:#C8F04A;
  --lime-line:rgba(200,240,74,.38);
  --amber:#F2A03D;
  --cyan:#4FB3C8;
  --gray-cool:#9AA6A1;
  --stroke-green:#5F7A6E;
  --white:#FFFFFF;

  --font-display:"Oswald","Barlow Condensed","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Consolas,monospace;

  --rail-w:96px;
  --rail-gap:128px;
  --bar-h:56px;
  --maxw:1320px;
  --gutter:clamp(16px,4vw,24px);
  --cut:0 18px 0 18px;
  --cut-sm:0 10px 0 10px;
  --sp:0;
}

@media (min-width:1024px){
  :root{ --bar-h:44px; }
}

/* ---------- 2. Reset 与基础排版 ---------- */
*,*::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,figure,blockquote,dl,dd,hr{ margin:0; }
ul,ol{ padding:0; list-style:none; }
img,svg,video{ display:block; max-width:100%; }
img{ height:auto; }
a{ color:inherit; text-decoration:none; }
button,input,select,textarea{ font:inherit; color:inherit; }
button{ background:none; border:0; padding:0; cursor:pointer; }
table{ border-collapse:collapse; width:100%; }
hr{ border:0; }

:focus-visible{
  outline:2px solid var(--lime);
  outline-offset:3px;
}

body{
  min-height:100vh;
  padding-top:var(--bar-h);
  background-color:var(--green-deep);
  background-image:repeating-linear-gradient(115deg,rgba(255,255,255,.022) 0 1px,transparent 1px 16px);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.65;
  letter-spacing:.01em;
  overflow-x:hidden;
}

/* 细颗粒噪点：整页压一层，透明度极低 */
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  opacity:.4;
  background-image:radial-gradient(rgba(255,255,255,.07) 1px,transparent 1px);
  background-size:3px 3px;
}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:600;
  line-height:1.1;
  letter-spacing:-.02em;
  color:var(--white);
}
h1{ font-size:clamp(32px,5vw,54px); }
h2{ font-size:clamp(28px,3.4vw,46px); }
h3{ font-size:clamp(20px,2.2vw,26px); }
h4{ font-size:20px; line-height:1.3; }

strong{ color:var(--white); }

#main-content{
  position:relative;
  z-index:1;
  display:block;
  scroll-margin-top:calc(var(--bar-h) + 24px);
}

/* ---------- 3. 布局与分区 ---------- */
@media (min-width:1024px){
  body{ padding-left:var(--rail-gap); }
}

.container{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.section{ padding-block:clamp(48px,7vw,96px); }

.band{ position:relative; }
.band--ink{
  background:var(--green-night);
  background-image:repeating-linear-gradient(115deg,rgba(255,255,255,.03) 0 1px,transparent 1px 15px);
}
.band--blue{
  background:var(--ink-blue);
  color:var(--paper);
}
.band--paper{
  background:var(--paper);
  color:var(--green-night);
}
.band--paper h1,.band--paper h2,.band--paper h3,.band--paper h4,.band--paper strong{ color:var(--green-night); }

.section-head{
  display:flex;
  flex-direction:column;
  gap:10px;
  margin-bottom:clamp(24px,3vw,40px);
}

.grid{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:var(--gutter);
}
@media (max-width:767px){
  .grid{ grid-template-columns:minmax(0,1fr); }
}
@media (min-width:768px){
  .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-9{ grid-column:span 9; }
  .span-12{ grid-column:span 12; }
}

.stack{ display:flex; flex-direction:column; gap:clamp(20px,3vw,32px); }
.stack--sm{ gap:12px; }

.prose{ max-width:68ch; }
.prose p{ margin-bottom:1em; }
.prose h2,.prose h3{ margin:1.6em 0 .6em; }
.prose ul,.prose ol{ display:grid; gap:.55em; margin:0 0 1em; }
.prose li{ position:relative; padding-left:18px; }
.prose li::before{
  content:"";
  position:absolute;
  left:0;
  top:.72em;
  width:8px;
  height:2px;
  background:var(--lime);
}
.prose a{ color:var(--lime); border-bottom:1px solid var(--lime-line); }

.lede{
  font-size:clamp(17px,1.6vw,20px);
  line-height:1.7;
  max-width:60ch;
  color:var(--paper);
}
.band--paper .lede{ color:#20493B; }

.eyebrow{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--lime);
}
.eyebrow--cyan{ color:var(--cyan); }
.eyebrow--amber{ color:var(--amber); }

.rule{
  height:1px;
  background:linear-gradient(90deg,var(--lime),rgba(200,240,74,0) 72%);
  transform:skewY(-1.4deg);
}
.rule--slant{
  height:2px;
  background:linear-gradient(90deg,rgba(79,179,200,0),var(--cyan) 22%,var(--lime) 68%,rgba(200,240,74,0));
  transform:skewY(-5deg);
}

.chapter{ position:relative; scroll-margin-top:calc(var(--bar-h) + 32px); }
.chapter[data-active="true"]::before{
  content:"";
  position:absolute;
  left:-14px;
  top:10px;
  bottom:10px;
  width:2px;
  background:var(--lime);
}

/* ---------- 4. 站点头部：进度 / 状态条 / 轨道 / 抽屉 ---------- */
.site-header{ position:relative; z-index:60; }

.skip-link{
  position:fixed;
  top:-120px;
  left:16px;
  z-index:200;
  display:inline-block;
  padding:12px 18px;
  background:var(--lime);
  color:var(--ink-blue);
  font-family:var(--font-display);
  font-size:15px;
  font-weight:700;
  letter-spacing:.06em;
  border-radius:var(--cut-sm);
  transition:top .2s ease;
}
.skip-link:focus{ top:12px; }

.read-progress{
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:3px;
  z-index:90;
  background:rgba(154,166,161,.16);
  pointer-events:none;
}
.read-progress::after{
  content:"";
  display:block;
  width:100%;
  height:100%;
  background:var(--lime);
  transform:scaleX(var(--sp));
  transform-origin:left center;
}

.statusbar{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:70;
  height:var(--bar-h);
  display:flex;
  align-items:center;
  gap:14px;
  padding:0 clamp(14px,3vw,24px);
  background:var(--ink-blue);
  border-bottom:1px solid rgba(200,240,74,.16);
  color:var(--gray-cool);
}

.statusbar__brand{
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:44px;
  padding-right:6px;
}
.statusbar__brand-name{
  font-family:var(--font-display);
  font-weight:700;
  font-size:18px;
  letter-spacing:-.01em;
  color:var(--white);
}
.statusbar__brand-sub{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--lime);
}

.statusbar__version{
  display:none;
  min-width:0;
  max-width:46vw;
  padding-left:14px;
  border-left:1px solid rgba(95,122,110,.55);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.02em;
  color:var(--gray-cool);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}

.statusbar__hint{
  display:none;
  margin-left:auto;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--stroke-green);
  white-space:nowrap;
}

.nav-toggle{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin-left:auto;
  min-height:44px;
  min-width:44px;
  padding:10px 14px;
  border:1px solid var(--lime-line);
  border-radius:var(--cut-sm);
  background:rgba(200,240,74,.06);
  color:var(--lime);
  font-family:var(--font-display);
  font-size:13px;
  font-weight:600;
  letter-spacing:.18em;
  text-transform:uppercase;
  transition:background-color .2s ease,border-color .2s ease;
}
.nav-toggle:hover{ background:rgba(200,240,74,.14); border-color:var(--lime); }

.nav-toggle__bars{
  position:relative;
  display:block;
  width:18px;
  height:2px;
  background:currentColor;
  transition:background-color .2s ease;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;
  height:2px;
  background:currentColor;
  transition:transform .24s ease,top .24s ease;
}
.nav-toggle__bars::before{ top:-6px; }
.nav-toggle__bars::after{ top:6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{ background:transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{ top:0; transform:rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{ top:0; transform:rotate(-45deg); }
.nav-toggle__text{ font-size:12px; }

/* 抽屉（移动 / 平板默认形态） */
.rail{
  position:fixed;
  top:0;
  left:0;
  bottom:0;
  z-index:60;
  width:min(300px,84vw);
  display:flex;
  flex-direction:column;
  gap:18px;
  padding:calc(var(--bar-h) + 18px) 20px 24px;
  background:var(--green-night);
  border-right:1px solid rgba(95,122,110,.45);
  box-shadow:24px 0 48px rgba(0,0,0,.35);
  transform:translateX(-102%);
  transition:transform .32s cubic-bezier(.22,.7,.25,1);
  overflow-y:auto;
  overscroll-behavior:contain;
}
.rail[data-open="true"]{ transform:translateX(0); }

.rail__brand{
  display:flex;
  flex-direction:column;
  gap:4px;
  padding-bottom:14px;
  border-bottom:1px solid rgba(95,122,110,.45);
}
.rail__brand-cn{
  font-family:var(--font-display);
  font-weight:700;
  font-size:22px;
  letter-spacing:.02em;
  color:var(--white);
}
.rail__brand-en{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.24em;
  color:var(--lime);
}
.rail__sub{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--gray-cool);
}

.rail__nav{ flex:1 1 auto; }
.rail__list{ display:flex; flex-direction:column; gap:4px; }

.rail__link{
  position:relative;
  display:flex;
  align-items:baseline;
  gap:10px;
  min-height:44px;
  padding:11px 12px;
  border-radius:var(--cut-sm);
  color:var(--gray-cool);
  transition:color .24s ease,background-color .24s ease;
}
.rail__link::before{
  content:"";
  position:absolute;
  left:0;
  top:9px;
  bottom:9px;
  width:3px;
  background:transparent;
  transition:background-color .24s ease;
}
.rail__idx{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.1em;
  color:var(--stroke-green);
}
.rail__label{
  font-family:var(--font-display);
  font-size:16px;
  letter-spacing:.02em;
}
.rail__link:hover{ color:var(--white); background:rgba(200,240,74,.07); }
.rail__link[aria-current="page"]{ color:var(--lime); background:rgba(200,240,74,.1); }
.rail__link[aria-current="page"]::before{ background:var(--lime); }
.rail__link[aria-current="page"] .rail__idx{ color:var(--lime); }

.rail__chapter{
  display:flex;
  flex-direction:column;
  gap:2px;
  padding:12px 12px 0;
  border-top:1px solid rgba(95,122,110,.45);
}
.rail__chapter-label{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--stroke-green);
}
.rail__chapter-value{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.04em;
  color:var(--lime);
}

.rail__cta{
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  margin-top:auto;
  padding:12px 16px;
  background:var(--lime);
  color:var(--ink-blue);
  font-family:var(--font-display);
  font-weight:700;
  font-size:15px;
  letter-spacing:.06em;
  border-radius:0 14px 0 14px;
  transition:background-color .2s ease,transform .2s ease;
}
.rail__cta:hover{ background:#D8FF67; transform:translateX(2px); }

.rail-scrim{
  position:fixed;
  inset:0;
  z-index:55;
  background:rgba(7,33,26,.72);
  opacity:0;
  visibility:hidden;
  transition:opacity .28s ease,visibility .28s ease;
}
.rail-scrim[data-visible="true"]{ opacity:1; visibility:visible; }

.rail-track{ display:none; }

@media (max-width:1023px){
  body.is-nav-open{ overflow:hidden; }
}

@media (min-width:768px){
  .statusbar__version{ display:block; }
}

@media (min-width:1024px){
  .rail-scrim{ display:none; }

  .statusbar{ left:var(--rail-w); padding-left:24px; }
  .statusbar__brand{ display:none; }
  .statusbar__hint{ display:block; }
  .nav-toggle{ display:none; }

  .rail{
    width:var(--rail-w);
    gap:16px;
    padding:22px 12px;
    transform:none;
    box-shadow:none;
    border-right:1px solid rgba(95,122,110,.35);
  }

  .rail__brand{
    flex-direction:row;
    align-items:flex-start;
    justify-content:center;
    gap:10px;
    padding-bottom:16px;
    border-bottom:0;
  }
  .rail__brand-cn{
    writing-mode:vertical-rl;
    font-size:19px;
    letter-spacing:.16em;
    line-height:1;
  }
  .rail__brand-en{
    writing-mode:vertical-rl;
    font-size:9px;
    letter-spacing:.24em;
    opacity:.85;
  }
  .rail__sub{ display:none; }

  .rail__nav{
    padding-block:12px;
    border-top:1px solid rgba(95,122,110,.35);
    border-bottom:1px solid rgba(95,122,110,.35);
  }
  .rail__list{ gap:2px; }
  .rail__link{
    flex-direction:column;
    align-items:center;
    gap:2px;
    padding:8px 4px;
    text-align:center;
  }
  .rail__link::before{ top:7px; bottom:7px; }
  .rail__idx{ font-size:9px; letter-spacing:.06em; }
  .rail__label{ font-size:14px; letter-spacing:0; }

  .rail__chapter{
    align-items:center;
    padding:12px 0 0;
    text-align:center;
  }
  .rail__chapter-label{ font-size:9px; letter-spacing:.1em; }
  .rail__chapter-value{ font-size:11px; letter-spacing:0; word-break:break-all; }

  .rail__cta{
    writing-mode:vertical-rl;
    min-height:0;
    padding:18px 8px;
    font-size:14px;
    letter-spacing:.16em;
  }
  .rail__cta:hover{ transform:translateY(-2px); }

  .rail-track{
    display:block;
    position:fixed;
    top:0;
    bottom:0;
    left:calc(var(--rail-w) - 3px);
    width:3px;
    z-index:65;
    background:rgba(154,166,161,.14);
    overflow:hidden;
    pointer-events:none;
  }
  .rail-track::after{
    content:"";
    position:absolute;
    inset:0;
    background:linear-gradient(180deg,var(--lime),rgba(200,240,74,.35));
    transform:scaleY(var(--sp));
    transform-origin:top center;
  }
}

/* ---------- 5. 页脚 ---------- */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:clamp(48px,8vw,96px);
  background:var(--green-night);
  color:var(--gray-cool);
}

.footer__edge{
  height:8px;
  background:var(--lime);
  clip-path:polygon(0 0,100% 58%,100% 100%,0 100%);
}

.footer__inner{
  max-width:var(--maxw);
  margin-inline:auto;
  padding:clamp(36px,5vw,64px) var(--gutter) clamp(24px,4vw,40px);
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:clamp(24px,3.4vw,40px);
}
@media (min-width:640px){
  .footer__inner{ grid-template-columns:repeat(2,minmax(0,1fr)); }
}
@media (min-width:1024px){
  .footer__inner{ grid-template-columns:1.5fr .8fr .8fr .8fr 1.4fr; }
}

.footer__brand{
  display:flex;
  flex-direction:column;
  gap:8px;
}
.footer__brand-name{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(24px,3vw,32px);
  letter-spacing:-.01em;
  color:var(--white);
}
.footer__brand-sub{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--lime);
}
.footer__signoff{
  font-size:14px;
  max-width:26ch;
  color:var(--gray-cool);
}
.footer__version{
  margin-top:6px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.04em;
  color:var(--stroke-green);
}

.footer__col{
  display:flex;
  flex-direction:column;
  gap:8px;
}
.footer__col-title{
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--lime);
}
.footer__list{ display:flex; flex-direction:column; }

.footer__link{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:6px 0;
  font-size:15px;
  color:var(--paper);
  transition:color .2s ease,transform .2s ease;
}
.footer__link:hover{ color:var(--lime); transform:translateX(3px); }

.footer__contact{
  display:flex;
  flex-direction:column;
  gap:14px;
}
.footer__contact-item{
  display:flex;
  flex-direction:column;
  gap:2px;
}
.footer__contact-key{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--stroke-green);
}
.footer__contact-value{
  font-size:14px;
  color:var(--paper);
  word-break:break-word;
}

.footer__base{
  max-width:var(--maxw);
  margin-inline:auto;
  padding:20px var(--gutter) clamp(28px,4vw,48px);
  border-top:1px solid rgba(95,122,110,.4);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 28px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.03em;
  color:var(--stroke-green);
}
.footer__note{ flex:1 1 320px; max-width:52ch; }
.footer__meta{ display:flex; flex-wrap:wrap; align-items:center; gap:8px 20px; }
.footer__icp{ color:var(--gray-cool); }
.footer__copy{ color:var(--stroke-green); }

/* ---------- 6. 通用组件 ---------- */
.panel{
  background:var(--paper);
  color:var(--green-night);
  border-radius:var(--cut);
  padding:clamp(20px,2.4vw,32px);
}
.panel--ink{ background:var(--green-night); color:var(--paper); }
.panel--blue{ background:var(--ink-blue); color:var(--paper); }
.panel--lime{ background:var(--lime); color:var(--ink-blue); }
.panel--outline{
  background:transparent;
  color:var(--paper);
  border:1px solid rgba(95,122,110,.5);
}
.panel--ink h2,.panel--ink h3,.panel--blue h2,.panel--blue h3{ color:var(--white); }
.panel--lime h2,.panel--lime h3,.panel--lime strong{ color:var(--ink-blue); }

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  min-height:44px;
  padding:12px 22px;
  border-radius:0 12px 0 12px;
  border:1px solid transparent;
  font-family:var(--font-display);
  font-size:15px;
  font-weight:600;
  letter-spacing:.06em;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.btn--primary{ background:var(--lime); color:var(--ink-blue); }
.btn--primary:hover{ background:#D8FF67; transform:translateY(-2px); }
.btn--ghost{ border-color:var(--stroke-green); color:var(--paper); }
.btn--ghost:hover{ border-color:var(--lime); color:var(--lime); }
.btn--cyan{ background:transparent; border-color:var(--cyan); color:var(--cyan); }
.btn--cyan:hover{ background:rgba(79,179,200,.14); }
.btn--amber{ background:transparent; border-color:var(--amber); color:var(--amber); }
.btn--amber:hover{ background:rgba(242,160,61,.16); }
.btn--sm{ min-height:44px; padding:9px 16px; font-size:13px; }

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border-radius:0 8px 0 8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--ink-blue);
  background:var(--gray-cool);
}
.tag--lime{ background:var(--lime); }
.tag--amber{ background:var(--amber); }
.tag--cyan{ background:var(--cyan); }
.tag--mute{
  background:rgba(154,166,161,.22);
  color:var(--paper);
  border:1px solid rgba(95,122,110,.6);
}

.metric{
  font-family:var(--font-mono);
  font-weight:700;
  letter-spacing:-.02em;
  color:var(--lime);
  line-height:.95;
}
.metric--lg{ font-size:clamp(32px,4vw,56px); }
.metric--xl{
  font-size:clamp(72px,13vw,168px);
  letter-spacing:-.04em;
  line-height:.9;
}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding-block:18px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--gray-cool);
}
.breadcrumb li{ display:inline-flex; align-items:center; gap:8px; }
.breadcrumb li + li::before{ content:"/"; color:var(--stroke-green); }
.breadcrumb a{ color:var(--gray-cool); }
.breadcrumb a:hover{ color:var(--lime); }
.breadcrumb [aria-current="page"]{ color:var(--lime); }

/* 图片容器：页面阶段放置真实图片或保留占位 */
.figure{
  position:relative;
  display:block;
  overflow:hidden;
  isolation:isolate;
  border-radius:var(--cut);
  background:linear-gradient(150deg,#0A2A21 0%,#07211A 58%,#101C2B 100%);
}
.figure img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.9) contrast(1.06);
}
.figure--16x9{ aspect-ratio:16 / 9; }
.figure--4x3{ aspect-ratio:4 / 3; }
.figure--1x1{ aspect-ratio:1 / 1; }
.figure--tall{ aspect-ratio:3 / 4; }
.figure--wide{ aspect-ratio:21 / 9; }

.figure::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:2;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(16,28,43,0) 45%,rgba(7,33,26,.86) 100%);
}
.figure--tactic::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(79,179,200,.18) 1px,transparent 1px),
    linear-gradient(90deg,rgba(79,179,200,.18) 1px,transparent 1px);
  background-size:34px 34px;
}
.figure__placeholder{
  position:absolute;
  inset:0;
  z-index:0;
  display:grid;
  place-items:center;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--stroke-green);
}
.figure__caption{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  z-index:3;
  padding:16px 20px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--paper);
}

/* ---------- 7. 工具类与降级 ---------- */
.visually-hidden{
  position:absolute;
  width:1px;
  height:1px;
  margin:-1px;
  padding:0;
  overflow:hidden;
  clip:rect(0 0 0 0);
  white-space:nowrap;
  border:0;
}

[data-reveal].is-hidden{ opacity:0; transform:translateY(16px); }
[data-reveal].is-visible{
  opacity:1;
  transform:none;
  transition:opacity .48s ease,transform .48s cubic-bezier(.22,.7,.25,1);
}

@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],
  [data-reveal].is-hidden{
    opacity:1 !important;
    transform:none !important;
  }
}