:root{
  --color-gold:#C9A227;
  --color-deep-blue:#162A4A;
  --color-snow:#F7F6F2;
  --color-red:#A63A2B;
  --color-barley:#E5C26B;
  --color-stone:#E0DDD4;
  --color-ink:#1C1B18;
  --color-mist:#8B9A9B;
  --font-display:"Source Han Serif SC","Songti SC","SimSun",serif;
  --font-body:"Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --sidebar-width:300px;
  --content-max:1120px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--color-snow);color:var(--color-ink);font-family:var(--font-body);font-size:16px;line-height:1.75}
h1,h2,h3,h4,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration-thickness:.06em;text-underline-offset:.16em}
a:hover{color:var(--color-gold)}
img,svg{display:block;max-width:100%}
img{height:auto}
address{font-style:normal}
button,input,select,textarea{font:inherit;color:inherit}
button{border:0;background:none;padding:0;cursor:pointer}
:focus-visible{outline:2px solid var(--color-gold);outline-offset:3px}
::selection{background:var(--color-gold);color:var(--color-deep-blue)}

.site-header{
  position:fixed;
  top:0;
  left:0;
  bottom:0;
  width:var(--sidebar-width);
  z-index:100;
  display:flex;
  flex-direction:column;
  padding:28px 24px 28px;
  background:var(--color-deep-blue);
  color:var(--color-snow);
  border-right:1px solid rgba(201,162,39,.5);
  box-shadow:12px 0 40px rgba(22,42,74,.14);
  overflow-y:auto;
}
.skip-link{
  position:fixed;
  top:8px;
  left:12px;
  z-index:200;
  padding:8px 14px;
  background:var(--color-gold);
  color:var(--color-deep-blue);
  font-weight:700;
  font-size:14px;
  transform:translateY(-200%);
  transition:transform .15s ease;
}
.skip-link:focus{transform:translateY(0)}
.brand{
  display:flex;
  gap:14px;
  align-items:center;
  color:var(--color-snow);
  text-decoration:none;
  padding-bottom:22px;
  border-bottom:1px solid rgba(247,246,242,.14);
}
.brand:hover{color:var(--color-gold)}
.brand__mark{
  width:48px;
  height:48px;
  flex:0 0 auto;
  border:1px solid var(--color-gold);
  background:rgba(201,162,39,.08);
  color:var(--color-gold);
  display:grid;
  place-items:center;
}
.brand__mark svg{width:32px;height:32px}
.brand__text{display:grid;gap:2px}
.brand__name{
  font-family:var(--font-display);
  font-size:23px;
  font-weight:700;
  line-height:1.2;
  letter-spacing:.04em;
  white-space:nowrap;
}
.brand__sub{
  font-size:12px;
  letter-spacing:.24em;
  color:var(--color-gold);
  text-transform:uppercase;
}
.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  padding:8px 10px;
  color:var(--color-snow);
  border:1px solid rgba(247,246,242,.2);
  background:rgba(201,162,39,.1);
}
.nav-toggle__box{
  width:24px;
  height:20px;
  display:grid;
  place-items:center;
}
.nav-toggle__line{
  position:relative;
  display:block;
  width:20px;
  height:2px;
  background:currentColor;
}
.nav-toggle__line::before,.nav-toggle__line::after{
  content:"";
  position:absolute;
  left:0;
  width:20px;
  height:2px;
  background:currentColor;
  transition:transform .15s ease,top .15s ease;
}
.nav-toggle__line::before{top:-6px}
.nav-toggle__line::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle__line{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__line::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__line::after{top:0;transform:rotate(-45deg)}
.nav-toggle__text{font-size:13px;letter-spacing:.14em}

.site-nav{flex:1;display:flex;flex-direction:column;min-height:0}
.site-nav__title{
  margin:24px 0 12px;
  font-size:12px;
  letter-spacing:.2em;
  color:var(--color-gold);
  text-transform:uppercase;
}
.site-nav__title::after{
  content:"";
  display:block;
  height:1px;
  margin-top:8px;
  background:linear-gradient(90deg,var(--color-gold),transparent);
  transform:skewX(-24deg);
}
.site-nav__list{display:grid;gap:2px}
.site-nav__item{margin:0}
.site-nav__link{
  display:flex;
  align-items:baseline;
  gap:12px;
  padding:11px 12px;
  border-left:2px solid transparent;
  color:rgba(247,246,242,.78);
  text-decoration:none;
  font-family:var(--font-display);
  font-size:17px;
  line-height:1.35;
  transition:background-color .15s ease,border-color .15s ease,color .15s ease;
}
.site-nav__link:hover{
  color:var(--color-snow);
  background:rgba(201,162,39,.12);
  border-left-color:var(--color-gold);
}
.site-nav__link[aria-current="page"]{
  color:var(--color-snow);
  background:linear-gradient(90deg,rgba(201,162,39,.22),rgba(201,162,39,0));
  border-left-color:var(--color-gold);
}
.site-nav__index{
  font-family:var(--font-body);
  font-size:12px;
  color:var(--color-gold);
  opacity:.9;
  letter-spacing:.08em;
}
.site-nav__text{display:block}
.header-meta{
  margin-top:auto;
  padding-top:20px;
  border-top:1px solid rgba(247,246,242,.14);
  display:grid;
  gap:4px;
  font-size:13px;
  color:rgba(247,246,242,.68);
}
.header-meta__label{
  color:var(--color-gold);
  font-size:11px;
  letter-spacing:.22em;
  margin-bottom:6px;
}
.header-meta__value{
  display:block;
  color:var(--color-snow);
  font-family:var(--font-display);
  font-size:14px;
  line-height:1.5;
}
.header-meta__note{
  margin-top:4px;
  font-size:12px;
  color:rgba(247,246,242,.5);
}
.site-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:3px;
  background:rgba(22,42,74,.8);
  overflow:hidden;
}
.site-progress__bar{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--color-gold),var(--color-barley));
  transition:width .12s linear;
}

#main-content{
  margin-left:var(--sidebar-width);
  padding:64px clamp(24px,5vw,72px);
  min-height:70vh;
  background:var(--color-snow);
}
.page-container{
  width:100%;
  max-width:var(--content-max);
  margin:0 auto;
}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin:0 0 28px;
  padding:0;
  list-style:none;
  font-size:14px;
  color:var(--color-mist);
}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:var(--color-gold)}
.breadcrumb__link{color:var(--color-mist);text-decoration:none}
.breadcrumb__link:hover{color:var(--color-gold)}
.breadcrumb__current{color:var(--color-ink);font-weight:600}

.page-head{
  margin:0 0 40px;
  padding:16px 0 28px;
  border-bottom:1px solid var(--color-stone);
}
.page-head__eyebrow{
  display:block;
  margin-bottom:10px;
  font-family:var(--font-display);
  font-size:14px;
  letter-spacing:.18em;
  color:var(--color-gold);
  text-transform:uppercase;
}
.page-head__title{
  font-family:var(--font-display);
  font-size:clamp(34px,5vw,56px);
  line-height:1.1;
  color:var(--color-deep-blue);
  font-weight:700;
  letter-spacing:.01em;
}
.page-head__desc{
  margin-top:14px;
  max-width:56ch;
  font-size:18px;
  line-height:1.7;
  color:var(--color-mist);
}

.section{margin:0 0 56px}
.section-head{
  display:grid;
  gap:8px;
  margin-bottom:24px;
}
.section-index{
  font-family:var(--font-display);
  font-size:14px;
  letter-spacing:.18em;
  color:var(--color-gold);
  text-transform:uppercase;
}
.section-title{
  font-family:var(--font-display);
  font-size:clamp(26px,4vw,40px);
  line-height:1.25;
  color:var(--color-deep-blue);
  font-weight:700;
  margin:0;
}
.section-lead{
  max-width:60ch;
  font-size:18px;
  line-height:1.7;
  color:var(--color-mist);
}
.section-divider{
  height:40px;
  margin:12px 0 40px;
}
.section-divider::before{
  content:"";
  display:block;
  height:1px;
  margin-top:20px;
  background:linear-gradient(90deg,var(--color-gold),transparent);
  transform:skewX(-24deg);
}

.btn{
  display:inline-block;
  border:1px solid var(--color-deep-blue);
  background:var(--color-deep-blue);
  color:var(--color-snow);
  padding:12px 22px;
  font-size:15px;
  letter-spacing:.05em;
  text-decoration:none;
  transition:background-color .15s ease,border-color .15s ease,color .15s ease;
}
.btn:hover{
  background:var(--color-gold);
  border-color:var(--color-gold);
  color:var(--color-deep-blue);
}
.btn--ghost{background:transparent;color:var(--color-deep-blue)}
.btn--ghost:hover{background:var(--color-deep-blue);color:var(--color-snow)}
.btn--gold{background:var(--color-gold);border-color:var(--color-gold);color:var(--color-deep-blue)}

.tag{
  display:inline-block;
  border:1px solid var(--color-stone);
  background:var(--color-snow);
  padding:2px 10px;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--color-ink);
  white-space:nowrap;
}
.tag--gold{
  background:rgba(201,162,39,.14);
  border-color:rgba(201,162,39,.4);
  color:var(--color-deep-blue);
}
.tag--red{
  background:rgba(166,58,43,.08);
  border-color:rgba(166,58,43,.35);
  color:var(--color-red);
}
.tag--blue{
  background:rgba(22,42,74,.08);
  border-color:rgba(22,42,74,.2);
  color:var(--color-deep-blue);
}
.tag--barley{
  background:var(--color-barley);
  border-color:transparent;
  color:var(--color-deep-blue);
}

.notice{
  display:flex;
  gap:14px;
  padding:16px 18px;
  margin:0 0 24px;
  background:var(--color-stone);
  border-left:4px solid var(--color-gold);
}
.notice--red{
  border-left-color:var(--color-red);
  background:rgba(166,58,43,.06);
}
.notice--gold{
  border-left-color:var(--color-gold);
  background:rgba(201,162,39,.08);
}
.notice__title{
  font-family:var(--font-display);
  font-weight:700;
  color:var(--color-deep-blue);
}
.notice__text{
  margin-top:2px;
  font-size:14px;
}

.card-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr));
  gap:18px;
  margin:0 0 40px;
}
.card{
  background:var(--color-snow);
  border:1px solid var(--color-stone);
  transition:border-color .15s ease,box-shadow .15s ease;
}
.card:hover{
  border-color:var(--color-gold);
  box-shadow:8px 8px 0 rgba(201,162,39,.14);
}
.card--highlight{
  background:var(--color-barley);
  border-color:var(--color-gold);
}
.card__body{padding:22px}
.card__title{
  font-family:var(--font-display);
  font-size:20px;
  font-weight:700;
  color:var(--color-deep-blue);
  margin:0 0 8px;
}
.card__desc{
  font-size:15px;
  line-height:1.7;
  margin:0 0 10px;
}
.card__meta{font-size:13px;color:var(--color-mist)}
.card__link{
  font-size:14px;
  font-weight:600;
  color:var(--color-gold);
  text-decoration:none;
}
.card__link:hover{color:var(--color-red)}

.stat-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:14px;
  margin:0 0 40px;
}
.stat{
  background:var(--color-snow);
  border:1px solid var(--color-stone);
  padding:18px;
}
.stat__num{
  display:block;
  font-family:var(--font-display);
  font-size:34px;
  line-height:1.1;
  font-weight:700;
  color:var(--color-deep-blue);
}
.stat__num span{color:var(--color-gold)}
.stat__label{
  display:block;
  margin-top:6px;
  font-size:13px;
  letter-spacing:.06em;
  color:var(--color-mist);
}

.timeline{
  position:relative;
  display:grid;
  gap:22px;
  margin:0 0 40px;
  padding-left:24px;
  border-left:1px solid var(--color-gold);
}
.timeline__item{position:relative}
.timeline__item::before{
  content:"";
  position:absolute;
  left:-29px;
  top:5px;
  width:9px;
  height:9px;
  background:var(--color-gold);
  transform:rotate(45deg);
}
.timeline__date{
  display:block;
  font-size:12px;
  letter-spacing:.14em;
  color:var(--color-gold);
  text-transform:uppercase;
}
.timeline__title{
  margin:4px 0 6px;
  font-family:var(--font-display);
  font-size:20px;
  color:var(--color-deep-blue);
}
.timeline__text{font-size:15px}

.table-wrap{
  overflow-x:auto;
  border:1px solid var(--color-stone);
  margin:0 0 40px;
}
.version-table{
  width:100%;
  min-width:560px;
  border-collapse:collapse;
  font-size:15px;
}
.version-table th,.version-table td{
  border:1px solid var(--color-stone);
  padding:12px 14px;
  text-align:left;
  vertical-align:top;
}
.version-table th{
  background:var(--color-deep-blue);
  color:var(--color-snow);
  font-family:var(--font-display);
  font-weight:700;
}
.version-table tr:nth-child(even) td{background:rgba(224,221,212,.35)}

.media-frame{
  position:relative;
  display:grid;
  place-items:center;
  aspect-ratio:16/9;
  overflow:hidden;
  background:var(--color-stone);
  border:1px solid var(--color-stone);
  color:var(--color-mist);
  font-size:14px;
  letter-spacing:.08em;
}
.media-frame::after{content:"雪域影像";opacity:.8}
.media-frame img{
  position:relative;
  z-index:1;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}

.grid{
  display:grid;
  gap:24px;
  margin:0 0 40px;
}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}

.filter-group{margin:0 0 40px}
.filter-bar{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin:0 0 24px;
}
.filter-btn{
  display:inline-block;
  border:1px solid var(--color-stone);
  background:transparent;
  padding:8px 16px;
  font-size:14px;
  letter-spacing:.04em;
  color:var(--color-ink);
  transition:border-color .15s ease,background-color .15s ease,color .15s ease;
}
.filter-btn:hover{
  border-color:var(--color-gold);
  color:var(--color-gold);
}
.filter-btn[aria-pressed="true"]{
  background:var(--color-deep-blue);
  border-color:var(--color-deep-blue);
  color:var(--color-snow);
}
.filter-item[hidden]{display:none!important}

.site-footer{
  margin-left:var(--sidebar-width);
  background:var(--color-deep-blue);
  color:var(--color-snow);
  padding:48px clamp(24px,5vw,64px) 20px;
  border-top:2px solid var(--color-gold);
}
.footer__top{
  display:grid;
  grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,1fr));
  gap:32px;
  padding-bottom:36px;
  border-bottom:1px solid rgba(247,246,242,.16);
}
.footer__brand{display:grid;align-content:start;gap:8px}
.footer__brand-name{
  font-family:var(--font-display);
  font-size:24px;
  font-weight:700;
  color:var(--color-gold);
  letter-spacing:.02em;
  margin:0;
}
.footer__trust{
  max-width:40em;
  font-size:14px;
  line-height:1.8;
  color:rgba(247,246,242,.72);
  margin:0;
}
.footer__col{
  display:grid;
  align-content:start;
  gap:12px;
}
.footer__heading{
  font-family:var(--font-display);
  font-size:16px;
  font-weight:700;
  color:var(--color-gold);
  letter-spacing:.08em;
  margin:0 0 4px;
}
.footer__list{display:grid;gap:8px}
.footer__list li{margin:0}
.footer__link{
  font-size:14px;
  color:rgba(247,246,242,.76);
  text-decoration:none;
}
.footer__link:hover{color:var(--color-gold)}
.footer__address{display:grid;gap:6px;font-style:normal}
.footer__contact-label{
  margin-top:4px;
  font-size:12px;
  letter-spacing:.14em;
  color:var(--color-gold);
}
.footer__contact-value{
  font-size:14px;
  line-height:1.5;
  color:rgba(247,246,242,.86);
}
.footer__bottom{
  display:flex;
  flex-wrap:wrap;
  gap:12px 24px;
  align-items:center;
  padding-top:20px;
  font-size:13px;
  color:rgba(247,246,242,.62);
}
.footer__meta-link{
  font-size:13px;
  color:rgba(247,246,242,.76);
  text-decoration:none;
}
.footer__meta-link:hover{color:var(--color-gold)}

@media (max-width:980px){
  .site-header{
    width:100%;
    top:0;
    bottom:auto;
    left:0;
    right:0;
    flex-direction:row;
    flex-wrap:wrap;
    align-items:center;
    padding:12px 20px;
    border-right:0;
    border-bottom:1px solid rgba(201,162,39,.55);
    box-shadow:0 4px 20px rgba(22,42,74,.14);
    overflow-y:visible;
  }
  .skip-link{left:8px;top:8px}
  .brand{
    padding-bottom:0;
    border-bottom:0;
    margin-right:auto;
  }
  .brand__mark{width:38px;height:38px}
  .brand__mark svg{width:26px;height:26px}
  .brand__name{font-size:20px}
  .brand__sub{font-size:11px}
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    display:none;
    flex-direction:column;
    background:var(--color-deep-blue);
    padding:0 24px 24px;
    border-bottom:1px solid var(--color-gold);
    box-shadow:0 12px 30px rgba(22,42,74,.25);
    max-height:calc(100vh - 64px);
    overflow-y:auto;
  }
  .site-nav[data-open]{display:flex}
  .site-nav__title{margin-top:14px;margin-bottom:10px}
  .site-nav__link{padding:10px 12px}
  .header-meta{margin-top:18px}
  #main-content{
    margin-left:0;
    padding:92px 20px 40px;
  }
  .site-footer{
    margin-left:0;
  }
}
@media (max-width:820px){
  .footer__top{
    grid-template-columns:1fr 1fr;
    gap:28px;
    padding-bottom:28px;
  }
  .grid--3{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:560px){
  .footer__top{grid-template-columns:1fr}
  .grid--2{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:1fr}
  .footer__bottom{gap:10px 16px}
  .breadcrumb{font-size:13px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.01ms!important;
    animation-iteration-count:1!important;
    transition-duration:.01ms!important;
    scroll-behavior:auto!important;
  }
  .site-progress__bar,.site-nav__link,.filter-btn,.btn,.card,.brand,.nav-toggle__line::before,.nav-toggle__line::after{
    transition:none;
  }
}