/* =========================================================
   奔驰宝马玩家 · 共享站点样式 /assets/site.css
   车库蓝图 · 竖轨导航 · 冷光仪表盘
   ========================================================= */

/* ---------- 01 变量 ---------- */
:root{
  --c-garage:#05070A;
  --c-carbon:#0C1116;
  --c-steel:#161D25;
  --c-line:#2A343E;
  --c-silver:#A9B3BE;
  --c-white:#EDF1F5;
  --c-dim:#74818E;
  --c-blue:#4FB8FF;
  --c-blue-deep:#135A8C;
  --c-orange:#FF8A2B;

  --rail-w:88px;
  --header-h:64px;
  --grid:24px;
  --wrap:1240px;
  --gutter:20px;

  --font-display:"Barlow Condensed","Source Han Sans SC","PingFang SC",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --font-body:"PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;

  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow-soft:0 1px 0 rgba(255,255,255,.03),0 14px 36px rgba(0,0,0,.5);
}

@media (min-width:768px){
  :root{ --gutter:32px; --header-h:72px; }
}
@media (min-width:1024px){
  :root{ --gutter:48px; }
}

/* ---------- 02 基础重置 ---------- */
*,*::before,*::after{ box-sizing:border-box; }

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}

body{
  margin:0;
  padding-top:var(--header-h);
  background-color:var(--c-garage);
  background-image:
    linear-gradient(to right, rgba(42,52,62,.32) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(42,52,62,.32) 1px, transparent 1px);
  background-size:var(--grid) var(--grid);
  background-position:center top;
  color:var(--c-silver);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}

@media (min-width:1024px){
  body{
    padding-top:0;
    padding-inline-start:var(--rail-w);
  }
}

img,video{ display:block; max-width:100%; height:auto; }
main{ display:block; }

h1,h2,h3,h4,h5,h6{ margin:0; font-weight:700; color:var(--c-white); }
p{ margin:0; }
ul,ol{ margin:0; padding:0; }
figure,blockquote{ margin:0; }

button{ font:inherit; color:inherit; border-radius:0; }
input,select,textarea{ font:inherit; }

a{ color:var(--c-blue); text-decoration:none; }
a:hover{ color:var(--c-white); }

::selection{ background:rgba(79,184,255,.28); color:var(--c-white); }

:focus-visible{
  outline:2px solid var(--c-blue);
  outline-offset:2px;
  border-radius:2px;
}

/* ---------- 03 排版基元 ---------- */
.display{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(32px,5.4vw,64px);
  line-height:.98;
  letter-spacing:-.02em;
  color:var(--c-white);
  text-wrap:balance;
}

.lede{
  font-size:clamp(15px,1.5vw,17px);
  line-height:1.8;
  color:var(--c-silver);
  max-width:34em;
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--c-dim);
}
.eyebrow::before{
  content:"";
  width:18px;
  height:1px;
  background:var(--c-blue);
  flex:none;
}

.rule{
  height:1px;
  border:0;
  margin:0;
  background:var(--c-line);
}

/* ---------- 04 布局容器 ---------- */
.container{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.section{
  position:relative;
  padding-block:clamp(56px,9vw,112px);
}

.section__head{
  display:grid;
  gap:14px;
  max-width:44em;
  margin-bottom:clamp(28px,4vw,52px);
}

.grid-12{
  display:grid;
  gap:var(--gutter);
  grid-template-columns:1fr;
}
.grid-12 > *{ grid-column:1 / -1; }

@media (min-width:768px){
  .grid-12{ grid-template-columns:repeat(12,minmax(0,1fr)); }
  .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; }
}

/* ---------- 05 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  min-height:44px;
  padding:0 22px;
  border:1px solid var(--c-line);
  background:var(--c-steel);
  color:var(--c-white);
  font-family:var(--font-body);
  font-size:14px;
  font-weight:600;
  letter-spacing:.1em;
  text-decoration:none;
  cursor:pointer;
  border-radius:2px;
  transition:background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.btn:hover{
  border-color:var(--c-blue);
  color:var(--c-white);
  text-decoration:none;
}
.btn:active{ transform:translateY(1px); }

.btn--primary{
  background:var(--c-blue);
  border-color:var(--c-blue);
  color:#03121D;
  box-shadow:0 10px 28px rgba(79,184,255,.18);
}
.btn--primary:hover{
  background:#7ACBFF;
  border-color:#7ACBFF;
  color:#03121D;
}

.btn--ghost{
  background:transparent;
  border-color:var(--c-line);
  color:var(--c-silver);
}
.btn--ghost:hover{
  color:var(--c-white);
  border-color:var(--c-blue);
}

/* ---------- 06 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:8px;
  left:8px;
  z-index:200;
  padding:10px 16px;
  background:var(--c-blue);
  color:#03121D;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.08em;
  border-radius:2px;
  transform:translateY(-180%);
  transition:transform .2s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{
  transform:translateY(0);
  outline:2px solid var(--c-white);
  outline-offset:2px;
}

/* ---------- 07 头部（移动端顶栏） ---------- */
.site-header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:120;
  height:var(--header-h);
  background:rgba(5,7,10,.92);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--c-line);
}

.header__bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  height:100%;
  padding-inline:var(--gutter);
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  color:var(--c-white);
  text-decoration:none;
}
.brand:hover{ color:var(--c-white); text-decoration:none; }

.brand__mark{
  display:grid;
  place-items:center;
  width:32px;
  height:32px;
  flex:none;
  border:1px solid var(--c-blue);
  background:linear-gradient(135deg,rgba(79,184,255,.18),rgba(19,90,140,0));
  color:var(--c-blue);
  font-family:var(--font-display);
  font-size:16px;
  font-weight:700;
  line-height:1;
}

.brand__text{
  display:flex;
  flex-direction:column;
  line-height:1.25;
}
.brand__name{
  font-size:15px;
  font-weight:600;
  letter-spacing:.04em;
  color:var(--c-white);
}
.brand__sub{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--c-dim);
}

/* 菜单按钮 */
.nav-toggle{
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-width:44px;
  min-height:44px;
  padding:0 10px;
  border:1px solid var(--c-line);
  background:var(--c-steel);
  color:var(--c-silver);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  cursor:pointer;
  border-radius:2px;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.nav-toggle:hover{ border-color:var(--c-blue); color:var(--c-white); }

.nav-toggle__bars{
  position:relative;
  display:block;
  width:16px;
  height:1px;
  background:currentColor;
  flex:none;
  transition:background .2s var(--ease);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:1px;
  background:currentColor;
  transition:transform .2s var(--ease),top .2s var(--ease);
}
.nav-toggle__bars::before{ top:-5px; }
.nav-toggle__bars::after{ top:5px; }

.site-header[data-open="true"] .nav-toggle__bars{ background:transparent; }
.site-header[data-open="true"] .nav-toggle__bars::before{ top:0; transform:rotate(45deg); }
.site-header[data-open="true"] .nav-toggle__bars::after{ top:0; transform:rotate(-45deg); }

/* ---------- 08 导航（移动端抽屉） ---------- */
.site-nav{
  position:absolute;
  top:100%;
  left:0;
  right:0;
  z-index:118;
  max-height:calc(100vh - var(--header-h));
  overflow-y:auto;
  background:var(--c-carbon);
  border-bottom:1px solid var(--c-line);
  box-shadow:0 28px 56px rgba(0,0,0,.62);
  visibility:hidden;
  opacity:0;
  transform:translateY(-12px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
}
.site-header[data-open="true"] .site-nav{
  visibility:visible;
  opacity:1;
  transform:translateY(0);
}

.site-nav__list{
  counter-reset:rail;
  list-style:none;
  display:flex;
  flex-direction:column;
  gap:2px;
  padding:10px var(--gutter) 22px;
}
.site-nav__list > li{ counter-increment:rail; }

.site-nav__link{
  position:relative;
  display:flex;
  align-items:center;
  gap:12px;
  min-height:48px;
  padding:8px 12px;
  border-left:2px solid transparent;
  color:var(--c-silver);
  font-size:15px;
  letter-spacing:.04em;
  text-decoration:none;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.site-nav__link::after{
  content:counter(rail,decimal-leading-zero);
  margin-left:auto;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.12em;
  color:var(--c-dim);
}
.site-nav__link:hover{
  background:rgba(79,184,255,.06);
  color:var(--c-white);
  text-decoration:none;
}
.site-nav__link[aria-current="page"]{
  color:var(--c-white);
  border-left-color:var(--c-blue);
  background:linear-gradient(90deg,rgba(79,184,255,.14),rgba(79,184,255,0));
}
.site-nav__link[aria-current="page"]::after{ color:var(--c-blue); }

.site-nav__dot{
  width:5px;
  height:5px;
  flex:none;
  border-radius:50%;
  background:var(--c-line);
  transition:background .18s var(--ease),box-shadow .18s var(--ease);
}
.site-nav__link[aria-current="page"] .site-nav__dot{
  background:var(--c-blue);
  box-shadow:0 0 0 3px rgba(79,184,255,.18);
}

.site-nav__label{ letter-spacing:.06em; }

/* 头部右侧元信息 */
.header__meta{ display:none; }

/* ---------- 09 滚动进度 ---------- */
.scroll-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  background:linear-gradient(90deg,var(--c-blue-deep),var(--c-blue));
  transform:scaleX(var(--sp,0));
  transform-origin:0 50%;
  pointer-events:none;
}

/* ---------- 10 桌面端竖轨 ---------- */
@media (min-width:1024px){
  .site-header{
    top:0;
    bottom:0;
    right:auto;
    width:var(--rail-w);
    height:auto;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    border-bottom:0;
    border-right:1px solid var(--c-line);
    background:linear-gradient(180deg,#0A0F14 0%,#05070A 100%);
    -webkit-backdrop-filter:none;
    backdrop-filter:none;
  }

  .header__bar{
    flex:0 0 auto;
    flex-direction:column;
    justify-content:center;
    height:auto;
    padding:20px 0 0;
    gap:0;
  }

  .brand{
    flex-direction:column;
    gap:0;
    justify-content:center;
  }
  .brand__mark{
    width:38px;
    height:38px;
    font-size:17px;
  }
  .brand__text{
    position:absolute;
    width:1px;
    height:1px;
    overflow:hidden;
    clip-path:inset(50%);
    white-space:nowrap;
  }

  .nav-toggle{ display:none; }

  .site-nav{
    position:static;
    flex:1 1 auto;
    display:flex;
    align-items:center;
    justify-content:center;
    width:100%;
    max-height:none;
    overflow:visible;
    padding:18px 0;
    background:none;
    border:0;
    box-shadow:none;
    visibility:visible;
    opacity:1;
    transform:none;
  }

  .site-nav__list{
    flex-direction:column;
    align-items:center;
    gap:6px;
    width:100%;
    padding:0;
  }
  .site-nav__list > li{ width:100%; display:flex; justify-content:center; }

  .site-nav__link{
    flex-direction:column-reverse;
    justify-content:center;
    gap:5px;
    width:60px;
    min-height:46px;
    padding:6px 0;
    border-left:0;
    border:1px solid transparent;
    border-radius:2px;
    font-family:var(--font-mono);
    font-size:11px;
    color:var(--c-dim);
  }
  .site-nav__link::after{
    margin:0;
    font-size:11px;
    letter-spacing:.08em;
    color:currentColor;
  }
  .site-nav__link:hover{
    background:rgba(79,184,255,.07);
    border-color:var(--c-line);
  }
  .site-nav__link[aria-current="page"]{
    background:rgba(79,184,255,.09);
    border-color:rgba(79,184,255,.38);
    color:var(--c-blue);
    border-left-color:rgba(79,184,255,.38);
  }

  .site-nav__dot{
    width:4px;
    height:4px;
  }

  .site-nav__label{
    position:absolute;
    left:calc(100% + 12px);
    top:50%;
    z-index:130;
    padding:6px 12px;
    background:var(--c-steel);
    border:1px solid var(--c-line);
    color:var(--c-white);
    font-family:var(--font-body);
    font-size:12px;
    letter-spacing:.14em;
    white-space:nowrap;
    opacity:0;
    transform:translateY(-50%) translateX(-6px);
    pointer-events:none;
    transition:opacity .18s var(--ease),transform .18s var(--ease);
  }
  .site-nav__link:hover .site-nav__label,
  .site-nav__link:focus-visible .site-nav__label{
    opacity:1;
    transform:translateY(-50%) translateX(0);
  }

  .header__meta{
    flex:0 0 auto;
    display:flex;
    flex-direction:column;
    align-items:center;
    gap:14px;
    padding:0 0 22px;
  }

  .header__cta{
    display:block;
    writing-mode:vertical-rl;
    text-align:center;
    padding:14px 8px;
    border:1px solid rgba(79,184,255,.45);
    background:rgba(79,184,255,.1);
    color:var(--c-blue);
    font-family:var(--font-mono);
    font-size:11px;
    letter-spacing:.18em;
    text-decoration:none;
    border-radius:2px;
    transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
  }
  .header__cta:hover{
    background:var(--c-blue);
    border-color:var(--c-blue);
    color:#03121D;
    text-decoration:none;
  }

  .header__ver{
    writing-mode:vertical-rl;
    font-family:var(--font-mono);
    font-size:10px;
    letter-spacing:.16em;
    color:var(--c-dim);
  }

  .scroll-progress{
    left:auto;
    right:-1px;
    top:0;
    bottom:0;
    width:2px;
    height:auto;
    background:linear-gradient(180deg,var(--c-blue),var(--c-blue-deep));
    transform:scaleY(var(--sp,0));
    transform-origin:50% 0;
  }
}

/* ---------- 11 页脚 ---------- */
.site-footer{
  position:relative;
  background-color:var(--c-carbon);
  background-image:
    linear-gradient(to right,rgba(42,52,62,.38) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(42,52,62,.38) 1px,transparent 1px);
  background-size:var(--grid) var(--grid);
  border-top:1px solid var(--c-line);
  margin-top:clamp(56px,8vw,112px);
}

.footer__inner{
  display:grid;
  gap:40px;
  grid-template-columns:1fr;
  max-width:var(--wrap);
  margin-inline:auto;
  padding:clamp(48px,7vw,80px) var(--gutter) 0;
}

@media (min-width:768px){
  .footer__inner{ grid-template-columns:repeat(2,minmax(0,1fr)); gap:40px 32px; }
  .footer__brandblock{ grid-column:1 / -1; }
}

@media (min-width:1024px){
  .footer__inner{
    grid-template-columns:minmax(0,1.5fr) repeat(3,minmax(0,1fr));
    gap:32px;
  }
  .footer__brandblock{ grid-column:auto; }
}

.footer__coord{
  display:inline-block;
  margin-bottom:18px;
  padding:3px 8px;
  border:1px solid var(--c-line);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  color:var(--c-dim);
}

.footer__wordmark{
  margin-bottom:12px;
  font-family:var(--font-display);
  font-size:clamp(26px,3.4vw,34px);
  font-weight:800;
  line-height:1;
  letter-spacing:.02em;
  color:var(--c-white);
}

.footer__tagline{
  margin-bottom:24px;
  font-size:14px;
  letter-spacing:.06em;
  color:var(--c-silver);
}

.footer__contact{
  list-style:none;
  display:grid;
  gap:10px;
}
.footer__contact li{
  display:flex;
  align-items:baseline;
  gap:12px;
  font-size:13px;
}

.footer__k{
  flex:none;
  width:40px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--c-dim);
}

.footer__v{
  color:var(--c-silver);
  word-break:break-word;
  line-height:1.6;
}
.footer__v--mono{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--c-white);
}

.footer__title{
  margin-bottom:16px;
  padding-bottom:10px;
  border-bottom:1px solid var(--c-line);
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--c-dim);
}

.footer__list{
  list-style:none;
  display:grid;
  gap:2px;
}

.footer__link{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  font-size:14px;
  letter-spacing:.04em;
  color:var(--c-silver);
  text-decoration:none;
  transition:color .18s var(--ease);
}
.footer__link::before{
  content:"";
  display:block;
  width:0;
  height:1px;
  margin-right:0;
  background:var(--c-blue);
  transition:width .18s var(--ease),margin-right .18s var(--ease);
}
.footer__link:hover,
.footer__link:focus-visible{
  color:var(--c-white);
  text-decoration:none;
}
.footer__link:hover::before,
.footer__link:focus-visible::before{
  width:14px;
  margin-right:8px;
}

.footer__bar{
  max-width:var(--wrap);
  margin:clamp(40px,6vw,56px) auto 0;
  padding:22px var(--gutter) 30px;
  border-top:1px solid var(--c-line);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px 32px;
}

.footer__legal{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  line-height:1.9;
  color:var(--c-dim);
}

.footer__note{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  letter-spacing:.04em;
  color:var(--c-silver);
}
.footer__note::before{
  content:"";
  width:6px;
  height:6px;
  flex:none;
  background:var(--c-orange);
  box-shadow:0 0 0 3px rgba(255,138,43,.16);
}

/* ---------- 12 面包屑 ---------- */
.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  list-style:none;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--c-dim);
}
.crumb > li{
  display:inline-flex;
  align-items:center;
  gap:8px;
}
.crumb a{
  color:var(--c-dim);
  text-decoration:none;
  transition:color .18s var(--ease);
}
.crumb a:hover{ color:var(--c-blue); text-decoration:none; }
.crumb__sep{ color:var(--c-line); }
.crumb [aria-current="page"]{ color:var(--c-silver); }

/* ---------- 13 面板与图片容器 ---------- */
.panel{
  position:relative;
  background:var(--c-steel);
  border:1px solid var(--c-line);
  border-radius:2px;
  padding:clamp(20px,3vw,28px);
  box-shadow:var(--shadow-soft);
}

.panel__head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:12px;
  margin-bottom:16px;
}

.media{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16 / 10;
  overflow:hidden;
  border:1px solid var(--c-line);
  border-radius:2px;
  background:
    radial-gradient(120% 90% at 15% 0%,rgba(19,90,140,.55) 0%,rgba(19,90,140,0) 62%),
    linear-gradient(135deg,#161D25 0%,#0C1116 100%);
}
.media::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:repeating-linear-gradient(0deg,rgba(255,255,255,.035) 0 1px,transparent 1px 4px);
}
.media--wide{ aspect-ratio:21 / 9; }
.media--tall{ aspect-ratio:3 / 4; }
.media--square{ aspect-ratio:1 / 1; }

.media__img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}

.media__coord{
  position:absolute;
  left:12px;
  bottom:12px;
  z-index:1;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  color:rgba(237,241,245,.6);
}

/* ---------- 14 标签与图例 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 8px;
  border:1px solid var(--c-line);
  border-radius:2px;
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:600;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--c-silver);
}
.tag--info{
  color:var(--c-blue);
  border-color:rgba(79,184,255,.4);
  background:rgba(79,184,255,.08);
}
.tag--warn{
  color:var(--c-orange);
  border-color:rgba(255,138,43,.4);
  background:rgba(255,138,43,.08);
}

.legend{
  display:flex;
  flex-wrap:wrap;
  gap:12px 20px;
  list-style:none;
}
.legend__item{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  letter-spacing:.06em;
  color:var(--c-dim);
}
.legend__swatch{
  width:8px;
  height:8px;
  flex:none;
  background:var(--c-line);
}
.legend__swatch--blue{ background:var(--c-blue); }
.legend__swatch--orange{ background:var(--c-orange); }
.legend__swatch--silver{ background:var(--c-silver); }

/* ---------- 15 数据条 ---------- */
.meter{
  display:grid;
  gap:8px;
}
.meter__val{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.04em;
  color:var(--c-white);
}
.meter__bar{
  height:4px;
  border-radius:999px;
  background:var(--c-steel);
  overflow:hidden;
}
.meter__bar > span{
  display:block;
  height:100%;
  width:var(--v,0%);
  background:linear-gradient(90deg,var(--c-blue-deep),var(--c-blue));
  transition:width .6s var(--ease);
}

/* ---------- 16 滚动显现 ---------- */
.reveal{
  transition:opacity .6s var(--ease),transform .6s var(--ease);
  transition-delay:var(--r-delay,0ms);
}
html.js .reveal{
  opacity:0;
  transform:translateY(12px);
}
html.js .reveal.is-visible{
  opacity:1;
  transform:translateY(0);
}

/* ---------- 17 减少动态 ---------- */
@media (prefers-reduced-motion:reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html.js .reveal{
    opacity:1;
    transform:none;
  }
  .site-nav__label{ transition:none; }
  .skip-link{ transition:none; }
}