:root{
  --sand:#F7F0E3;
  --gold:#C9933F;
  --gold-light:#E8C98A;
  --slate:#244C57;
  --slate-light:#D7E1E1;
  --flame:#D9431A;
  --blue:#2B8FD8;
  --ink:#11181C;
  --indigo:#1B2440;
  --wine:#7A2030;
  --rail-w:96px;
  --bar-h:62px;
  --bw:3px;
  --hard:6px 6px 0 var(--ink);
  --hard-sm:3px 3px 0 var(--ink);
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --maxw:1240px;
  --gutter:clamp(1.1rem,3vw,2.4rem);
  --ease:cubic-bezier(.2,.7,.2,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--sand);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:clamp(15px,.35vw + .88rem,17px);
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img,svg{display:block;max-width:100%}
h1,h2,h3,h4,p,figure,ul,ol,blockquote{margin:0}
h1,h2,h3,h4{font-weight:900;line-height:1.14;letter-spacing:-.03em}
a{color:var(--slate);text-decoration-thickness:2px;text-underline-offset:.22em}
a:hover{color:var(--flame)}
button{font:inherit;color:inherit}
strong,b{font-weight:800}
::selection{background:var(--gold-light);color:var(--ink)}

:focus-visible{outline:3px solid var(--blue);outline-offset:3px}
.rail :focus-visible,.site-footer :focus-visible,.section--slate :focus-visible,.section--indigo :focus-visible{outline-color:var(--gold-light)}

.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ===== 跳转链接 ===== */
.skip-link{
  position:fixed;top:0;left:0;z-index:200;
  transform:translateY(-160%);
  background:var(--ink);color:#fff;
  padding:.75rem 1.15rem;
  font-weight:800;font-size:.9rem;letter-spacing:.02em;
  text-decoration:none;
  border-right:3px solid var(--flame);
  border-bottom:3px solid var(--flame);
  transition:transform .18s var(--ease);
}
.skip-link:focus{transform:translateY(0);color:#fff}

/* ===== 滚动进度 ===== */
.scroll-meter{
  position:fixed;top:0;left:0;right:0;height:3px;z-index:90;
  pointer-events:none;background:rgba(17,24,28,.12);
}
.scroll-meter__fill{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--blue),var(--flame));
}

/* ===== 头部：侧轨 ===== */
.site-header{position:relative;z-index:60}
.rail{
  display:flex;flex-direction:column;gap:.9rem;
  background:var(--slate);color:#fff;
  border-right:var(--bw) solid var(--ink);
  padding:1.1rem .6rem 1rem;
  scrollbar-width:thin;
}
.rail__top{display:flex;flex-direction:column;align-items:center;gap:.7rem}
.rail__brand{
  display:flex;flex-direction:column;align-items:center;gap:.55rem;
  text-decoration:none;color:#fff;
}
.rail__brand:hover{color:#fff}
.rail__brand-mark{
  display:grid;place-items:center;
  width:46px;height:46px;
  background:var(--gold-light);color:var(--ink);
  font-family:var(--font-mono);font-weight:700;font-size:1rem;letter-spacing:.02em;
  border:var(--bw) solid var(--ink);
  box-shadow:3px 3px 0 var(--flame);
}
.rail__brand-text{
  writing-mode:vertical-rl;text-orientation:mixed;
  font-size:.78rem;font-weight:800;letter-spacing:.34em;
}
.rail__utility{
  display:block;width:100%;text-align:center;
  font-family:var(--font-mono);font-size:.62rem;line-height:1.35;letter-spacing:.04em;
  padding:.42rem .2rem;
  color:var(--gold-light);text-decoration:none;
  border:2px solid var(--gold);
  transition:background .16s var(--ease),color .16s var(--ease);
}
.rail__utility:hover{background:var(--gold-light);color:var(--ink);border-color:var(--gold-light)}

.primary-nav{display:flex;flex-direction:column;justify-content:center;flex:1 1 auto;min-height:0}
.primary-nav__list{display:flex;flex-direction:column;gap:.28rem;width:100%;margin:0;padding:0;list-style:none}
.primary-nav__item{width:100%}
.primary-nav__link{
  display:block;
  padding:.52rem .2rem;
  font-size:.72rem;font-weight:700;line-height:1.3;text-align:center;
  color:var(--slate-light);text-decoration:none;
  border:2px solid transparent;
  transition:color .16s var(--ease),background .16s var(--ease),border-color .16s var(--ease),box-shadow .16s var(--ease);
}
.primary-nav__link:hover{color:#fff;border-color:rgba(215,225,225,.5)}
.primary-nav__link[aria-current="page"]{
  background:var(--gold-light);color:var(--ink);
  border:2px solid var(--ink);
  box-shadow:3px 3px 0 var(--flame);
}
.primary-nav__index{display:none}

.rail__bottom{display:flex;flex-direction:column;align-items:center;gap:.7rem;margin-top:auto}
.rail__cta{
  display:block;width:100%;text-align:center;
  background:var(--flame);color:#fff;
  font-size:.72rem;font-weight:800;letter-spacing:.04em;
  padding:.55rem .2rem;text-decoration:none;
  border:2px solid var(--ink);
  box-shadow:3px 3px 0 rgba(17,24,28,.55);
  transition:background .16s var(--ease),color .16s var(--ease);
}
.rail__cta:hover{background:var(--gold-light);color:var(--ink)}
.rail__hint{display:none;font-size:.72rem;line-height:1.5;color:rgba(215,225,225,.8);text-align:center}

/* ===== 头部：移动条 ===== */
.mobile-bar{display:none}
.nav-toggle{display:none}
.nav-scrim{display:none}

/* ===== 页脚 ===== */
.site-footer{
  background:var(--slate);color:var(--slate-light);
  border-top:var(--bw) solid var(--ink);
  margin-top:clamp(2.5rem,6vw,5rem);
}
.footer__inner,.footer__contact,.footer__legal{
  width:min(100% - 2.5rem,var(--maxw));
  margin-inline:auto;
}
.footer__inner{
  display:grid;
  grid-template-columns:minmax(0,1.25fr) minmax(0,2fr);
  gap:clamp(1.6rem,4vw,3.5rem);
  padding-block:clamp(2.4rem,5vw,3.8rem) clamp(1.6rem,3vw,2.4rem);
}
.footer__brand{display:flex;flex-direction:column;gap:.7rem}
.footer__mark{
  display:flex;flex-direction:column;line-height:1.02;
  font-size:clamp(1.55rem,3vw,2.2rem);font-weight:900;letter-spacing:-.03em;
  color:#fff;transform:skewX(-3deg);
}
.footer__mark-en{
  font-family:var(--font-mono);font-size:.6rem;font-weight:500;
  letter-spacing:.44em;color:var(--gold-light);margin-top:.5rem;
}
.footer__tagline{font-size:.92rem;color:var(--gold-light);font-weight:700;letter-spacing:.02em}
.footer__note{font-size:.8rem;line-height:1.6;color:rgba(215,225,225,.72);max-width:26ch}
.footer__region{
  align-self:flex-start;
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.14em;
  color:var(--gold-light);
  padding:.32rem .6rem;
  border:2px solid var(--gold);
}
.footer__grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.6rem}
.footer__col{min-width:0}
.footer__col-title{
  font-size:.76rem;font-weight:800;letter-spacing:.18em;line-height:1.3;
  color:var(--gold);
  padding-bottom:.55rem;margin-bottom:.8rem;
  border-bottom:2px solid rgba(201,147,63,.55);
}
.footer__links{display:flex;flex-direction:column;gap:.45rem;margin:0;padding:0;list-style:none}
.footer__link{
  display:inline-block;
  color:var(--slate-light);font-size:.9rem;line-height:1.5;
  text-decoration:none;border-bottom:1px solid transparent;
  transition:color .15s var(--ease),border-color .15s var(--ease);
}
.footer__link:hover{color:var(--gold-light);border-bottom-color:var(--gold-light)}
.footer__contact{
  display:flex;flex-wrap:wrap;gap:.35rem 1.6rem;
  padding-block:1.35rem;
  border-top:2px solid rgba(215,225,225,.18);
}
.footer__contact-line{
  font-family:var(--font-mono);font-size:.78rem;line-height:1.6;
  color:rgba(215,225,225,.86);
}
.footer__legal{
  display:flex;flex-wrap:wrap;align-items:center;gap:.5rem 1.6rem;
  padding-block:1.1rem 1.8rem;
  border-top:2px solid rgba(215,225,225,.18);
  font-family:var(--font-mono);font-size:.74rem;
  color:rgba(215,225,225,.72);
}

/* ===== 基础布局组件 ===== */
.container{width:min(100% - 2.5rem,var(--maxw));margin-inline:auto}
.container--narrow{width:min(100% - 2.5rem,820px);margin-inline:auto}
.section{padding-block:clamp(2.6rem,6vw,5rem)}
.section--slate{background:var(--slate);color:#fff}
.section--indigo{background:var(--indigo);color:#fff}
.section--gold{background:var(--gold-light);color:var(--ink)}
.section--cool{background:var(--slate-light);color:var(--ink)}
.section--slate h2,.section--slate h3,.section--indigo h2,.section--indigo h3{color:#fff}
.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);font-size:.72rem;font-weight:600;
  letter-spacing:.22em;text-transform:uppercase;
  color:var(--gold);
  margin-bottom:.7rem;
}
.section--slate .eyebrow,.section--indigo .eyebrow{color:var(--gold-light)}
.rule{height:var(--bw);background:var(--ink);border:0;margin-block:1.6rem}
.section--slate .rule,.section--indigo .rule{background:var(--gold)}
.grid{display:grid;gap:clamp(1rem,2.4vw,2rem);grid-template-columns:minmax(0,1fr)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--asym{grid-template-columns:minmax(0,38fr) minmax(0,62fr)}

/* ===== 卡片与面板 ===== */
.card{
  background:#fff;color:var(--ink);
  border:var(--bw) solid var(--ink);
  box-shadow:var(--hard);
  padding:clamp(1.1rem,2.4vw,1.8rem);
}
.card__title{font-size:clamp(1.05rem,1.6vw,1.3rem);margin-bottom:.6rem}
.panel{
  background:#fff;color:var(--ink);
  border:var(--bw) solid var(--ink);
  box-shadow:var(--hard);
  padding:clamp(1.2rem,2.6vw,2rem);
}
.panel--slant{transform:skewY(-2.2deg)}
.panel--slant > .panel__inner{transform:skewY(2.2deg)}

/* ===== 徽章与编号 ===== */
.badge{
  display:inline-flex;align-items:center;gap:.35em;
  font-family:var(--font-mono);font-size:.7rem;font-weight:600;letter-spacing:.06em;
  padding:.28em .6em;
  border:2px solid var(--ink);
  background:var(--gold-light);color:var(--ink);
}
.badge--wine{background:var(--wine);color:#fff;border-color:var(--wine)}
.badge--gold{background:var(--gold);color:var(--ink)}
.badge--blue{background:var(--blue);color:#fff}
.index-tag{
  display:inline-block;
  font-family:var(--font-mono);font-size:.74rem;font-weight:600;letter-spacing:.1em;
  padding-left:.55rem;
  border-left:4px solid var(--flame);
  color:var(--slate);
}
.section--slate .index-tag,.section--indigo .index-tag{color:var(--gold-light)}

/* ===== 图片容器 ===== */
.figure{margin:0;display:flex;flex-direction:column;gap:.65rem}
.figure__frame{
  position:relative;overflow:hidden;
  aspect-ratio:4/3;
  background:var(--gold-light);
  border:var(--bw) solid var(--ink);
  box-shadow:var(--hard);
}
.figure__img{width:100%;height:100%;object-fit:cover;display:block}
.figure__caption{
  font-family:var(--font-mono);font-size:.72rem;line-height:1.6;
  letter-spacing:.02em;color:var(--slate);
}
.section--slate .figure__caption,.section--indigo .figure__caption{color:var(--slate-light)}
.figure--slant .figure__frame{
  clip-path:polygon(0 0,100% 0,100% calc(100% - 34px),0 100%);
  border:0;
  outline:var(--bw) solid var(--ink);
  outline-offset:-6px;
}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.55em;
  padding:.8em 1.35em;
  font-family:var(--font-body);font-size:.95rem;font-weight:800;letter-spacing:.02em;
  text-decoration:none;
  background:var(--sand);color:var(--ink);
  border:var(--bw) solid var(--ink);
  box-shadow:var(--hard);
  cursor:pointer;
  transition:transform .16s var(--ease),box-shadow .16s var(--ease),background .16s var(--ease),color .16s var(--ease);
}
.btn:hover{transform:translate(-2px,-2px);box-shadow:8px 8px 0 var(--ink);color:var(--ink)}
.btn:active{transform:translate(2px,2px);box-shadow:2px 2px 0 var(--ink)}
.btn--flame{background:var(--flame);color:#fff}
.btn--flame:hover{background:var(--flame);color:#fff}
.btn--gold{background:var(--gold);color:var(--ink)}
.btn--slate{background:var(--slate);color:#fff}
.btn--slate:hover{color:#fff}
.btn--ghost{background:transparent;box-shadow:none}
.btn--ghost:hover{box-shadow:none;background:var(--gold-light)}

/* ===== 面包屑 ===== */
.breadcrumbs{margin-block:1.4rem 0}
.breadcrumbs__list{
  display:flex;flex-wrap:wrap;align-items:center;gap:.45rem;
  margin:0;padding:0;list-style:none;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.04em;
}
.breadcrumbs__item{display:inline-flex;align-items:center;gap:.45rem;color:var(--slate)}
.breadcrumbs__link{color:var(--slate);text-decoration:none;border-bottom:2px solid var(--gold)}
.breadcrumbs__link:hover{color:var(--flame);border-bottom-color:var(--flame)}
.breadcrumbs__sep{color:var(--gold);font-size:.7rem}
.breadcrumbs__item[aria-current="page"]{color:var(--ink);font-weight:600}

/* ===== 正文 ===== */
.prose{max-width:70ch}
.prose > * + *{margin-top:1.05em}
.prose h2{margin-top:1.9em;font-size:clamp(1.35rem,2vw,1.7rem)}
.prose h3{margin-top:1.5em;font-size:1.15rem}
.prose ul{margin:0;padding:0;list-style:none}
.prose li{position:relative;padding-left:1.4rem;margin-top:.55em}
.prose li::before{
  content:"";position:absolute;left:0;top:.62em;
  width:.52rem;height:.52rem;background:var(--gold);border:2px solid var(--ink);
}
.prose a{color:var(--slate);text-decoration:underline;text-decoration-color:var(--blue);text-decoration-thickness:2px}
.prose a:hover{color:var(--flame);text-decoration-color:var(--flame)}

/* ===== 筛选组 ===== */
.filter{display:flex;flex-wrap:wrap;gap:.5rem}
.filter-btn{
  font-family:var(--font-mono);font-size:.78rem;font-weight:600;letter-spacing:.04em;
  padding:.5rem .85rem;
  background:#fff;color:var(--ink);
  border:2px solid var(--ink);
  box-shadow:3px 3px 0 rgba(17,24,28,.22);
  cursor:pointer;
  transition:background .16s var(--ease),color .16s var(--ease),box-shadow .16s var(--ease),transform .16s var(--ease);
}
.filter-btn:hover{background:var(--gold-light);transform:translate(-1px,-1px)}
.filter-btn[aria-pressed="true"]{background:var(--flame);color:#fff;box-shadow:3px 3px 0 var(--ink)}
.section--slate .filter-btn,.section--indigo .filter-btn{border-color:var(--ink)}
.is-filtered{display:none !important}
[data-filter-item].is-fresh{animation:filterIn .3s var(--ease) both}
@keyframes filterIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}

/* ===== 显现 ===== */
.js [data-reveal]{opacity:0;transform:translateY(22px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.js [data-reveal].is-in{opacity:1;transform:none}

/* ===== 移动端外壳 ===== */
@media (max-width:1079px){
  body{padding-top:var(--bar-h)}
  body.is-nav-open{overflow:hidden}
  .mobile-bar{
    position:fixed;top:0;left:0;right:0;z-index:70;
    display:flex;align-items:center;gap:.7rem;
    height:var(--bar-h);padding:0 .9rem;
    background:var(--slate);
    border-bottom:var(--bw) solid var(--ink);
  }
  .mobile-bar__brand{
    color:#fff;font-size:.98rem;font-weight:900;letter-spacing:.08em;
    text-decoration:none;
  }
  .mobile-bar__brand:hover{color:var(--gold-light)}
  .mobile-bar__utility{
    margin-left:auto;
    font-family:var(--font-mono);font-size:.64rem;letter-spacing:.05em;
    padding:.32rem .5rem;
    color:var(--gold-light);text-decoration:none;
    border:2px solid var(--gold);
  }
  .mobile-bar__utility:hover{background:var(--gold-light);color:var(--ink)}
  .nav-toggle{
    display:flex;flex-direction:column;justify-content:center;gap:5px;
    width:44px;height:40px;padding:0 9px;
    background:var(--flame);
    border:2px solid var(--ink);
    box-shadow:3px 3px 0 rgba(17,24,28,.5);
    cursor:pointer;
  }
  .nav-toggle__bar{
    display:block;width:100%;height:2px;background:#fff;
    transition:transform .2s var(--ease),opacity .2s var(--ease);
  }
  .nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2){opacity:0}
  .nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

  .rail{
    position:fixed;top:var(--bar-h);left:0;bottom:0;z-index:65;
    width:min(86vw,330px);
    padding:1.2rem 1rem 1.6rem;
    overflow-y:auto;
    transform:translateX(-102%);
    transition:transform .26s var(--ease);
    box-shadow:10px 0 26px rgba(17,24,28,.4);
  }
  .rail[data-open="true"]{transform:translateX(0)}
  .rail__top{flex-direction:row;align-items:center;justify-content:space-between;gap:.8rem}
  .rail__brand{flex-direction:row;align-items:center;gap:.6rem}
  .rail__brand-mark{width:40px;height:40px;font-size:.86rem}
  .rail__brand-text{writing-mode:horizontal-tb;letter-spacing:.18em;font-size:.88rem}
  .rail__utility{width:auto;font-size:.66rem;padding:.4rem .55rem}
  .primary-nav{flex:0 0 auto;justify-content:flex-start;margin-top:.4rem}
  .primary-nav__list{gap:.3rem}
  .primary-nav__link{
    display:flex;align-items:baseline;gap:.75rem;
    text-align:left;font-size:1rem;padding:.72rem .7rem;
    border:2px solid transparent;border-left:4px solid transparent;
  }
  .primary-nav__index{
    display:inline-block;
    font-family:var(--font-mono);font-size:.72rem;font-weight:600;
    letter-spacing:.06em;color:var(--gold);
  }
  .primary-nav__link[aria-current="page"] .primary-nav__index{color:var(--flame)}
  .rail__bottom{width:100%;margin-top:1.4rem;align-items:stretch}
  .rail__cta{font-size:.9rem;padding:.78rem .4rem;box-shadow:4px 4px 0 rgba(17,24,28,.55)}
  .rail__hint{display:block;text-align:left}

  .nav-scrim{
    display:block;
    position:fixed;inset:0;z-index:62;
    background:rgba(17,24,28,.6);
    opacity:0;pointer-events:none;
    transition:opacity .22s var(--ease);
  }
  .nav-scrim[data-open="true"]{opacity:1;pointer-events:auto}
}

/* ===== 桌面端侧轨 ===== */
@media (min-width:1080px){
  body{padding-left:var(--rail-w)}
  .rail{
    position:fixed;top:0;left:0;bottom:0;z-index:60;
    width:var(--rail-w);
    padding:1.1rem .6rem 1rem;
    overflow-y:auto;
  }
  .mobile-bar{display:none}
  .nav-scrim{display:none}
}

/* ===== 网格与页脚响应式 ===== */
@media (max-width:1024px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:980px){
  .footer__inner{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:760px){
  .grid--2,.grid--3,.grid--asym{grid-template-columns:minmax(0,1fr)}
  .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:1.4rem}
  .footer__contact{flex-direction:column;gap:.3rem}
  .footer__legal{font-size:.7rem}
}
@media (max-width:480px){
  .footer__grid{grid-template-columns:minmax(0,1fr)}
}

/* ===== 动效与可访问性 ===== */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .js [data-reveal]{opacity:1;transform:none}
  [data-filter-item].is-fresh{animation:none}
  .btn:hover,.filter-btn:hover{transform:none}
}

@media print{
  .rail,.mobile-bar,.nav-scrim,.scroll-meter,.skip-link{display:none !important}
  body{padding:0;background:#fff;color:#000}
  .site-footer{border-top:1px solid #000;background:#fff;color:#000}
  .footer__mark,.footer__tagline,.footer__col-title,.footer__link,.footer__contact-line,.footer__legal{color:#000}
}