:root{
  --ink:#0B1B2B;
  --ink-2:#1E2F3F;
  --ink-3:#16283A;
  --sand:#D8C3A5;
  --mist:#E6EDF3;
  --amber:#FF9F1C;
  --jade:#2EC4B6;
  --clay:#C96F4A;
  --cream:#F7F3E8;
  --moss:#5C7A5C;

  --line:rgba(230,237,243,.14);
  --line-strong:rgba(230,237,243,.28);
  --text:var(--cream);
  --text-dim:rgba(247,243,232,.68);
  --text-mute:rgba(247,243,232,.44);

  --rail-w:272px;
  --wrap:1180px;
  --pad:clamp(18px,3.6vw,46px);
  --r:3px;
  --ease:cubic-bezier(.2,.7,.3,1);

  --ff-display:"Helvetica Neue","Arial Narrow",system-ui,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --ff-body:system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --ff-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}

*,*::before,*::after{box-sizing:border-box}

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

body{
  margin:0;
  min-height:100vh;
  font-family:var(--ff-body);
  font-size:17px;
  line-height:1.8;
  color:var(--text);
  background:
    radial-gradient(1100px 620px at 10% -10%, rgba(46,196,182,.10), transparent 62%),
    radial-gradient(900px 520px at 98% 2%, rgba(255,159,28,.08), transparent 60%),
    var(--ink);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

img{display:block;max-width:100%;height:auto}
a{color:var(--jade);text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--amber)}
button{font:inherit;color:inherit;background:none;border:0}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0 0 1em}

h1,h2,h3,h4{
  margin:0;
  font-family:var(--ff-display);
  font-stretch:87.5%;
  font-weight:800;
  line-height:1.1;
  letter-spacing:-.02em;
  color:var(--cream);
}
h1{font-size:clamp(38px,5.6vw,62px)}
h2{font-size:clamp(26px,3.4vw,38px)}
h3{font-size:clamp(20px,2.4vw,27px)}
h4{font-size:clamp(17px,1.8vw,20px);letter-spacing:0}

::selection{background:var(--amber);color:#1a1206}

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

/* ---------- 布局骨架 ---------- */
main{display:block;min-height:60vh}
#main-content{scroll-margin-top:92px}

@media (min-width:1024px){
  main{padding-left:var(--rail-w)}
  .site-footer{padding-left:var(--rail-w)}
  #main-content{scroll-margin-top:28px}
}

.wrap{
  width:100%;
  max-width:var(--wrap);
  margin:0 auto;
  padding:0 var(--pad);
}

.lede{
  font-size:clamp(17px,1.5vw,19px);
  line-height:1.85;
  color:var(--text-dim);
  max-width:62ch;
}

.mono{
  font-family:var(--ff-mono);
  font-size:12.5px;
  letter-spacing:.08em;
}

.rule{
  border:0;
  border-top:1px solid var(--line);
  margin:clamp(28px,4vw,48px) 0;
}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:absolute;
  left:14px;
  top:-70px;
  z-index:220;
  padding:11px 18px;
  background:var(--amber);
  color:#1a1206;
  font-weight:700;
  font-size:14px;
  border-radius:2px;
  transition:top .18s var(--ease);
}
.skip-link:focus{top:14px;color:#1a1206}

/* ---------- 品牌轨道 / 头部 ---------- */
.cmd-rail{
  position:sticky;
  top:0;
  z-index:90;
  background:rgba(11,27,43,.94);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}

.rail__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px;
  padding:10px var(--pad);
}

.rail__brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex:1 1 auto;
  min-width:0;
  color:var(--cream);
}
.rail__brand:hover{color:var(--cream)}

.rail__mark{
  display:grid;
  place-items:center;
  flex:none;
  width:32px;
  height:32px;
  background:var(--amber);
  color:#1a1206;
  font-family:var(--ff-display);
  font-stretch:87.5%;
  font-weight:800;
  font-size:16px;
  border-radius:2px;
}

.rail__name{
  font-family:var(--ff-display);
  font-stretch:87.5%;
  font-weight:800;
  font-size:17px;
  letter-spacing:.01em;
  white-space:nowrap;
}

.rail__tag{
  font-family:var(--ff-mono);
  font-size:10px;
  letter-spacing:.16em;
  color:var(--text-mute);
  white-space:nowrap;
}

.rail__toggle{
  display:inline-flex;
  align-items:center;
  gap:9px;
  flex:none;
  padding:8px 13px;
  border:1px solid var(--line-strong);
  border-radius:2px;
  color:var(--cream);
  cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease),background .18s var(--ease);
}
.rail__toggle:hover{border-color:var(--amber);color:var(--amber)}
.rail__toggle[aria-expanded="true"]{border-color:var(--jade);color:var(--jade);background:rgba(46,196,182,.08)}

.rail__bars{display:grid;gap:4px;width:16px}
.rail__bars i{
  display:block;
  height:2px;
  background:currentColor;
  transition:transform .2s var(--ease);
}
.rail__toggle[aria-expanded="true"] .rail__bars i:first-child{transform:translateY(3px) rotate(45deg)}
.rail__toggle[aria-expanded="true"] .rail__bars i:last-child{transform:translateY(-3px) rotate(-45deg)}

.rail__toggle-text{
  font-family:var(--ff-mono);
  font-size:11.5px;
  letter-spacing:.14em;
}

.rail__nav{
  flex-basis:100%;
  max-height:0;
  overflow:hidden;
  opacity:0;
  visibility:hidden;
  transition:max-height .32s var(--ease),opacity .24s var(--ease),visibility 0s linear .32s;
}
.rail__nav[data-open]{
  max-height:72vh;
  overflow-y:auto;
  opacity:1;
  visibility:visible;
  transition:max-height .32s var(--ease),opacity .24s var(--ease),visibility 0s;
}

.rail__navlabel{
  margin:14px 0 10px;
  font-family:var(--ff-mono);
  font-size:10.5px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--text-mute);
}

.rail__list{display:grid;gap:2px}
.rail__item{display:block}

.rail__link{
  display:flex;
  align-items:center;
  gap:12px;
  padding:10px 10px;
  border-left:2px solid transparent;
  color:rgba(247,243,232,.76);
  font-size:15px;
  line-height:1.35;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.rail__link:hover{
  background:rgba(255,159,28,.09);
  border-left-color:var(--amber);
  color:var(--cream);
}
.rail__link[aria-current="page"]{
  background:rgba(46,196,182,.11);
  border-left-color:var(--jade);
  color:var(--cream);
}

.rail__idx{
  flex:none;
  font-family:var(--ff-mono);
  font-size:11px;
  letter-spacing:.06em;
  color:var(--clay);
  transition:color .18s var(--ease);
}
.rail__link:hover .rail__idx{color:var(--amber)}
.rail__link[aria-current="page"] .rail__idx{color:var(--jade)}

.rail__lbl{flex:1 1 auto;min-width:0}

.rail__foot{
  max-height:0;
  overflow:hidden;
  opacity:0;
  visibility:hidden;
  transition:max-height .32s var(--ease),opacity .24s var(--ease),visibility 0s linear .32s;
}
.rail__nav[data-open] ~ .rail__foot{
  max-height:260px;
  opacity:1;
  visibility:visible;
  transition:max-height .32s var(--ease),opacity .24s var(--ease),visibility 0s;
}

.rail__sub{
  display:block;
  margin-top:10px;
  padding:2px 0;
  font-family:var(--ff-mono);
  font-size:12px;
  letter-spacing:.08em;
  text-align:center;
  color:var(--jade);
}
.rail__sub:hover{color:var(--amber);text-decoration:underline;text-underline-offset:3px}

.rail__meta{
  margin:10px 0 0;
  font-family:var(--ff-mono);
  font-size:10.5px;
  letter-spacing:.1em;
  text-align:center;
  color:var(--text-mute);
}

/* 桌面端：固定侧边轨道 */
@media (min-width:1024px){
  .cmd-rail{
    position:fixed;
    inset:0 auto 0 0;
    width:var(--rail-w);
    border-bottom:0;
    border-right:1px solid var(--line);
    background:linear-gradient(180deg,#0E2135 0%,#0B1B2B 62%,#0A1723 100%);
    overflow-y:auto;
  }
  .rail__inner{
    flex-direction:column;
    align-items:stretch;
    flex-wrap:nowrap;
    gap:0;
    min-height:100%;
    padding:26px 22px 22px;
  }
  .rail__brand{
    flex-direction:column;
    align-items:flex-start;
    gap:10px;
    padding:0 0 20px;
    border-bottom:1px solid var(--line);
  }
  .rail__mark{width:44px;height:44px;font-size:20px}
  .rail__name{font-size:21px}
  .rail__tag{padding:0}
  .rail__toggle{display:none}
  .rail__nav{
    flex-basis:auto;
    max-height:none;
    overflow:visible;
    opacity:1;
    visibility:visible;
    margin-top:22px;
  }
  .rail__navlabel{margin:0 0 12px}
  .rail__link{font-size:14.5px;padding:9px 10px}
  .rail__foot{
    display:grid;
    gap:2px;
    margin-top:auto;
    padding-top:20px;
    max-height:none;
    overflow:visible;
    opacity:1;
    visibility:visible;
    border-top:1px solid var(--line);
  }
  .rail__sub{text-align:left;padding-left:2px}
  .rail__meta{text-align:left;padding-left:2px;margin-top:8px}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 20px;
  border:1px solid transparent;
  border-radius:2px;
  font-family:var(--ff-display);
  font-stretch:87.5%;
  font-weight:800;
  font-size:14px;
  letter-spacing:.04em;
  line-height:1;
  text-align:center;
  cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.btn--block{width:100%}
.btn--amber{background:var(--amber);color:#1a1206}
.btn--amber:hover{background:#FFB247;color:#1a1206;transform:translateY(-2px)}
.btn--jade{background:var(--jade);color:#042B28}
.btn--jade:hover{background:#4FD8CB;color:#042B28;transform:translateY(-2px)}
.btn--ghost{background:transparent;border-color:var(--line-strong);color:var(--cream)}
.btn--ghost:hover{border-color:var(--amber);color:var(--amber);transform:translateY(-2px)}

/* ---------- 展览标签 / 说明牌 / 标签 ---------- */
.plaque{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:6px 13px;
  background:var(--sand);
  color:#1F1509;
  font-family:var(--ff-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  border-radius:2px;
}
.plaque--dark{
  background:var(--ink-2);
  color:var(--mist);
  border:1px solid var(--line-strong);
}

.spec{
  padding:15px 17px;
  border-left:2px solid var(--jade);
  background:rgba(46,196,182,.07);
  font-size:15px;
  line-height:1.75;
  color:var(--text-dim);
  border-radius:0 2px 2px 0;
}

.tag{
  display:inline-block;
  padding:3px 10px;
  border:1px solid var(--line-strong);
  border-radius:999px;
  font-family:var(--ff-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--text-dim);
}
.tag--amber{border-color:rgba(255,159,28,.5);color:var(--amber)}
.tag--jade{border-color:rgba(46,196,182,.5);color:var(--jade)}
.tag--clay{border-color:rgba(201,111,74,.55);color:var(--clay)}

/* ---------- 网格 ---------- */
.grid{display:grid;gap:clamp(16px,2.4vw,26px);grid-template-columns:1fr}
.grid--2{grid-template-columns:1fr}
.grid--3{grid-template-columns:1fr}

@media (min-width:680px){
  .grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:1080px){
  .grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
}

/* ---------- 图片容器（页面阶段复用的基础规则） ---------- */
.figure{display:block;margin:0}

.figure__media{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--r);
  aspect-ratio:16/10;
  background:
    linear-gradient(140deg,rgba(46,196,182,.16),rgba(255,159,28,.10) 55%,rgba(201,111,74,.14)),
    var(--ink-2);
}
.figure__media img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.figure__media--wide{aspect-ratio:21/9}
.figure__media--tall{aspect-ratio:3/4}
.figure__media--square{aspect-ratio:1/1}

.figure__cap{
  margin-top:10px;
  font-family:var(--ff-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--text-mute);
}

/* ---------- 面包屑 ---------- */
.breadcrumb{margin:0 0 clamp(18px,2.6vw,28px)}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--ff-mono);
  font-size:11.5px;
  letter-spacing:.1em;
}
.breadcrumb__item{
  display:flex;
  align-items:center;
  gap:8px;
  color:var(--text-mute);
}
.breadcrumb__item + .breadcrumb__item::before{
  content:"/";
  color:rgba(247,243,232,.24);
}
.breadcrumb__link{color:rgba(247,243,232,.62)}
.breadcrumb__link:hover{color:var(--amber)}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,7vw,96px);
  padding:clamp(42px,6vw,76px) var(--pad) 26px;
  background:linear-gradient(180deg,#0B1B2B 0%,#0A1723 100%);
  border-top:1px solid var(--line);
  color:var(--text-dim);
  font-size:14.5px;
}

.foot__inner{max-width:var(--wrap);margin:0 auto}

.foot__grid{
  display:grid;
  gap:clamp(28px,4vw,46px);
  grid-template-columns:1fr;
}
@media (min-width:640px){
  .foot__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:1024px){
  .foot__grid{grid-template-columns:1.7fr 1fr 1fr 1.4fr}
}

.foot__col{min-width:0}

.foot__logo{
  margin:0 0 12px;
  font-family:var(--ff-display);
  font-stretch:87.5%;
  font-weight:800;
  font-size:22px;
  letter-spacing:-.01em;
  color:var(--cream);
}

.foot__desc{
  margin:0 0 14px;
  max-width:34ch;
  line-height:1.8;
  color:var(--text-dim);
}

.foot__stamp{
  margin:0;
  font-family:var(--ff-mono);
  font-size:10.5px;
  letter-spacing:.16em;
  color:var(--clay);
}

.foot__title{
  margin:0 0 16px;
  font-family:var(--ff-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--sand);
}

.foot__list{display:grid;gap:9px}

.foot__link{
  color:rgba(247,243,232,.7);
  font-size:14.5px;
  transition:color .18s var(--ease),padding-left .18s var(--ease);
}
.foot__link:hover{color:var(--amber);padding-left:4px}

.foot__contact{display:grid;gap:15px}

.foot__key{
  display:block;
  margin-bottom:3px;
  font-family:var(--ff-mono);
  font-size:10.5px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--text-mute);
}

.foot__val{
  display:block;
  color:rgba(247,243,232,.84);
  font-size:14.5px;
  line-height:1.65;
  word-break:break-word;
}

.foot__note{
  margin:16px 0 0;
  padding-left:13px;
  border-left:2px solid var(--moss);
  font-size:13px;
  line-height:1.7;
  color:var(--text-mute);
}

.foot__bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 22px;
  margin-top:clamp(30px,4vw,50px);
  padding-top:20px;
  border-top:1px solid var(--line);
}

.foot__legal,
.foot__icp{
  margin:0;
  font-family:var(--ff-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--text-mute);
}
.foot__icp{color:rgba(216,195,165,.75)}

.foot__mini{
  display:flex;
  flex-wrap:wrap;
  gap:8px 18px;
  margin-left:auto;
}
.foot__mini .foot__link{font-size:13px}

/* ---------- 显现动效 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
[data-reveal].is-in{opacity:1;transform:none}

/* ---------- 降低动态效果 ---------- */
@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;transform:none}
  .rail__nav{transition:none}
}