/* ============ 1. reset ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0}
h1,h2,h3,h4,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}

/* ============ 2. 变量 ============ */
:root{
  --gold:#E9B949;
  --red:#C8102E;
  --green:#0E2A26;
  --copper:#B4783C;
  --curtain:#6E0A1A;
  --ink:#0B0B0C;
  --paper:#F6F1E6;
  --stone:#6F6F6C;
  --gold-wash:#F3DFA6;
  --sand:#E4DCCB;
  --line:rgba(11,11,12,.14);
  --line-gold:rgba(233,185,73,.5);
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",Georgia,serif;
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-num:"Oswald","Barlow Condensed","DIN Alternate","Arial Narrow",var(--font-sans);
  --shell:1240px;
  --shell-wide:1440px;
  --shell-narrow:760px;
  --ease:cubic-bezier(.2,.7,.3,1);
}

/* ============ 3. 基础排版 ============ */
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:17px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:var(--font-serif);font-weight:800;line-height:1.16;letter-spacing:-.005em}
h1{font-size:clamp(2.6rem,6vw,5.2rem)}
h2{font-size:clamp(1.8rem,3.2vw,2.8rem)}
h3{font-size:clamp(1.25rem,2vw,1.6rem)}
h4{font-size:1.05rem}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
strong{font-weight:700}
:focus-visible{outline:2px solid var(--red);outline-offset:3px}
::selection{background:var(--gold-wash);color:var(--ink)}

/* ============ 4. 容器 ============ */
.container{width:min(100% - 2.4rem,var(--shell));margin-inline:auto}
.container--wide{width:min(100% - 2.4rem,var(--shell-wide))}
.container--narrow{width:min(100% - 2.4rem,var(--shell-narrow))}

/* ============ 5. 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  padding:.72em 1.35em;font-family:var(--font-sans);font-size:15px;font-weight:500;
  letter-spacing:.08em;line-height:1.2;border:1px solid transparent;border-radius:2px;
  background:transparent;color:var(--ink);cursor:pointer;
  transition:background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.btn--primary{background:var(--red);color:var(--paper);border-color:var(--red)}
.btn--primary:hover{background:var(--curtain);border-color:var(--curtain);transform:translateY(-1px)}
.btn--ghost{border-color:var(--line);color:var(--ink)}
.btn--ghost:hover{border-color:var(--gold);background:var(--gold-wash);color:var(--ink)}
.btn--gold{background:var(--gold);color:var(--ink);border-color:var(--gold)}
.btn--gold:hover{background:var(--copper);border-color:var(--copper);color:var(--paper)}

/* ============ 6. 页头 ============ */
.skip-link{
  position:absolute;left:1rem;top:-4rem;z-index:99;
  background:var(--ink);color:var(--paper);padding:.6rem 1rem;
  font-size:14px;letter-spacing:.1em;transition:top .2s var(--ease);
}
.skip-link:focus{top:.5rem}

.site-header{
  position:sticky;top:0;z-index:70;
  background:var(--paper);
  border-bottom:1px solid var(--line);
}
.site-header__progress{
  position:absolute;left:0;right:0;top:0;height:3px;
  background:rgba(11,11,12,.08);overflow:hidden;
}
.site-header__progress-bar{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--gold),var(--red));
  transition:transform .1s linear;
}
.masthead{padding-top:3px}
.masthead__inner{
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  grid-template-areas:"brand nav cta";
  align-items:center;gap:1rem;padding-block:1.05rem;
}
.brand{grid-area:brand;display:inline-flex;align-items:center;gap:.7rem;min-width:0}
.brand__seal{
  display:inline-flex;align-items:center;justify-content:center;flex:none;
  width:2.3rem;height:2.3rem;border-radius:2px;
  background:var(--red);color:var(--paper);
  font-family:var(--font-serif);font-weight:900;font-size:1.05rem;line-height:1;
  border:1px solid rgba(233,185,73,.75);
  box-shadow:0 0 0 1px rgba(110,10,26,.45);
}
.brand__text{display:flex;flex-direction:column;line-height:1.15;min-width:0}
.brand__name{font-family:var(--font-serif);font-weight:800;font-size:1.05rem;letter-spacing:.02em;color:var(--ink)}
.brand__sub{font-size:11px;letter-spacing:.16em;color:var(--stone)}

.site-nav{grid-area:nav;justify-self:center}
.site-nav__list{display:flex;align-items:center;gap:clamp(.75rem,2.2vw,2.1rem)}
.site-nav__item{position:relative}
.site-nav__link{
  position:relative;display:inline-block;padding:.35rem 0;
  font-size:15px;letter-spacing:.1em;color:var(--ink);
  transition:color .22s var(--ease);
}
.site-nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:-.15rem;height:2px;
  background:var(--gold);transform:scaleX(0);transform-origin:0 50%;
  transition:transform .24s var(--ease);
}
.site-nav__link:hover{color:var(--red)}
.site-nav__link:hover::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--red);font-weight:500}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1);background:var(--red)}

.masthead__cta{grid-area:cta;justify-self:end;font-size:14px;padding:.62em 1.15em}

.nav-toggle{
  grid-area:toggle;display:none;align-items:center;gap:.5rem;
  padding:.45rem .7rem;background:transparent;border:1px solid var(--line);
  border-radius:2px;cursor:pointer;font-size:13px;letter-spacing:.14em;
  transition:border-color .22s var(--ease),background-color .22s var(--ease);
}
.nav-toggle:hover{border-color:var(--gold);background:rgba(233,185,73,.14)}
.nav-toggle__bars{display:inline-flex;flex-direction:column;justify-content:space-between;width:18px;height:12px}
.nav-toggle__bars span{display:block;height:1.5px;background:var(--ink);transition:transform .24s var(--ease),opacity .24s var(--ease)}
.nav-toggle__label{color:var(--ink)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(5.25px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-5.25px) rotate(-45deg)}

.masthead__rail{
  display:flex;align-items:center;gap:1rem;
  padding-bottom:.6rem;font-size:12px;letter-spacing:.14em;color:var(--stone);
}
.masthead__folio{
  font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:13px;letter-spacing:.14em;color:var(--curtain);white-space:nowrap;
}
.masthead__rule{flex:1;height:1px;background:linear-gradient(90deg,rgba(233,185,73,.18),var(--gold))}
.masthead__issue{white-space:nowrap;color:var(--stone);font-family:var(--font-num);letter-spacing:.12em}

/* ============ 7. 页脚 ============ */
.site-footer{
  position:relative;
  background:var(--green);color:var(--paper);
  border-top:3px solid var(--gold);
  padding:clamp(2.75rem,5vw,4.5rem) 0 1.5rem;
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:3px;height:1px;
  background:linear-gradient(90deg,var(--gold),rgba(200,16,46,.85),rgba(233,185,73,0));
}
.footer__grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;
  gap:clamp(1.6rem,3vw,3rem);
}
.footer__col{min-width:0}
.footer__title{
  font-family:var(--font-serif);font-size:15px;font-weight:700;
  letter-spacing:.16em;color:var(--gold);margin:0 0 1rem;
}
.footer__list{display:grid;gap:.55rem;font-size:15px}
.footer__link{
  color:rgba(246,241,230,.78);
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer__link:hover{color:var(--gold);border-bottom-color:var(--gold)}
.footer__note{
  margin:1rem 0 .85rem;max-width:26em;
  font-size:14px;line-height:1.7;color:rgba(246,241,230,.66);
}
.footer__icp{
  font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:13px;letter-spacing:.1em;color:var(--copper);margin:0;
}
.footer__list--contact{gap:1rem}
.footer__list--contact li{display:block}
.footer__key{display:block;font-size:12px;letter-spacing:.16em;color:var(--copper)}
.footer__value{display:block;font-size:15px;color:var(--paper);word-break:break-all}
.copy-btn{
  margin-top:.4rem;padding:.25rem .65rem;
  background:transparent;border:1px solid rgba(233,185,73,.5);border-radius:2px;
  color:var(--gold);font-size:12px;letter-spacing:.14em;cursor:pointer;
  transition:background-color .2s var(--ease),color .2s var(--ease);
}
.copy-btn:hover{background:var(--gold);color:var(--green)}
.copy-btn.is-done{background:var(--gold);color:var(--green)}
.footer__hint{margin:1rem 0 0;font-size:13px;line-height:1.7;color:rgba(246,241,230,.55)}
.footer__bottom{
  margin-top:clamp(2rem,4vw,3rem);padding-top:1.25rem;
  border-top:1px solid rgba(233,185,73,.25);
  display:flex;flex-wrap:wrap;gap:1rem;justify-content:space-between;align-items:center;
  font-size:13px;
}
.footer__legal{margin:0;color:rgba(246,241,230,.6)}
.footer__legal-list{display:flex;flex-wrap:wrap;gap:1.25rem}

/* ============ 8. 分区与章节 ============ */
.section{position:relative;padding:clamp(3.25rem,7vw,6.5rem) 0}
.section--ink{background:var(--ink);color:var(--paper)}
.section--green{background:var(--green);color:var(--paper)}
.section--sand{background:var(--sand)}
.section--goldwash{background:var(--gold-wash)}
.section--curtain{background:linear-gradient(155deg,var(--curtain) 0%,#3B0511 55%,var(--ink) 100%);color:var(--paper)}
.section--ink h1,.section--green h1,.section--curtain h1,
.section--ink h2,.section--green h2,.section--curtain h2,
.section--ink h3,.section--green h3,.section--curtain h3{color:var(--paper)}
.section--ink .section-head__note,.section--green .section-head__note,.section--curtain .section-head__note{color:rgba(246,241,230,.7)}

.section-head{
  display:grid;grid-template-columns:auto minmax(0,1fr);
  gap:.6rem 1.4rem;align-items:start;
  margin-bottom:clamp(1.75rem,3.5vw,3rem);
}
.section-head__index{
  font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:clamp(1.2rem,2vw,1.7rem);line-height:1.25;letter-spacing:.1em;
  color:var(--copper);
  transition:color .26s var(--ease),transform .26s var(--ease);
}
.section-head__title{font-family:var(--font-serif);font-size:clamp(1.8rem,3.2vw,2.8rem);font-weight:800;line-height:1.16}
.section-head__note{grid-column:2;max-width:40em;font-size:15px;color:var(--stone)}
.section.is-active .section-head__index{color:var(--gold);transform:translateY(-4px)}

.hairline{height:1px;border:0;margin:0;background:linear-gradient(90deg,var(--gold),rgba(233,185,73,.08))}

/* ============ 9. 栅格与正文 ============ */
.grid{display:grid;gap:clamp(1.4rem,3vw,2.6rem)}
.grid--split{grid-template-columns:7fr 5fr}
.grid--split-reverse{grid-template-columns:5fr 7fr}
.grid--halves{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--thirds{grid-template-columns:repeat(3,minmax(0,1fr))}

.prose{max-width:38em}
.prose h3{margin:1.7em 0 .6em}
.prose ul,.prose ol{padding-left:1.4em;margin:0 0 1.1em;list-style:disc}
.prose ol{list-style:decimal}
.prose li{margin-bottom:.4em}
.section--ink .prose p,.section--green .prose p,.section--curtain .prose p{color:rgba(246,241,230,.82)}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-weight:600;letter-spacing:.03em}

/* ============ 10. 面包屑 ============ */
.breadcrumb{padding:1rem 0;font-size:13px;letter-spacing:.06em;color:var(--stone)}
.breadcrumb__list{display:flex;flex-wrap:wrap;gap:.4rem}
.breadcrumb__item::after{content:"／";margin-left:.4rem;color:var(--copper)}
.breadcrumb__item:last-child::after{content:""}
.breadcrumb__link{color:var(--stone);border-bottom:1px solid transparent;transition:color .2s var(--ease),border-color .2s var(--ease)}
.breadcrumb__link:hover{color:var(--red);border-bottom-color:var(--gold)}

/* ============ 11. 图片容器 ============ */
.media{position:relative;overflow:hidden;border-radius:2px;background:var(--ink);border:1px solid var(--line-gold)}
.media img{width:100%;height:100%;object-fit:cover;filter:saturate(.82) contrast(1.03)}
.media::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(11,11,12,0) 48%,rgba(11,11,12,.5));
}
.media--wide{aspect-ratio:16/9}
.media--portrait{aspect-ratio:3/4}
.media--tall{aspect-ratio:4/5}
.media--square{aspect-ratio:1/1}
.media__caption{margin-top:.6rem;font-size:13px;letter-spacing:.06em;color:var(--stone)}

/* ============ 12. 档案组件 ============ */
.index-card{
  position:relative;border-radius:2px;padding:1.4rem 1.35rem 1.5rem;
  background:var(--paper);border:1px solid var(--line);border-top:2px solid var(--gold);
  box-shadow:0 14px 30px -28px rgba(11,11,12,.85);
  transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.index-card:hover{transform:translateY(-2px);border-color:var(--gold);box-shadow:0 22px 40px -30px rgba(11,11,12,.9)}
.index-card__num{
  display:block;font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:2rem;line-height:1;color:var(--ink);
  transition:color .24s var(--ease);
}
.index-card:hover .index-card__num{color:var(--gold)}
.index-card__label{display:block;margin:.55rem 0 .35rem;font-family:var(--font-serif);font-size:1.1rem;font-weight:700}
.index-card__meta{display:block;font-family:var(--font-num);font-size:12px;letter-spacing:.14em;color:var(--copper)}
.index-card__text{margin-top:.65rem;font-size:15px;line-height:1.7;color:var(--stone)}

.aside-note{
  margin:0 0 1.1rem;padding:.25rem 0 .25rem 1rem;
  border-left:2px solid var(--copper);
  font-size:14px;line-height:1.7;color:var(--stone);
}
.aside-note__label{display:block;font-family:var(--font-num);font-size:12px;letter-spacing:.18em;color:var(--copper);margin-bottom:.2rem}

.stat{display:flex;flex-direction:column;gap:.35rem;padding:.25rem 0}
.stat__num{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:clamp(2.2rem,4.6vw,3.6rem);line-height:1;color:var(--gold)}
.stat__label{font-size:13px;letter-spacing:.14em;color:var(--stone)}
.section--ink .stat__label,.section--green .stat__label,.section--curtain .stat__label{color:rgba(246,241,230,.65)}

.seal{
  display:inline-flex;align-items:center;justify-content:center;
  width:2.4rem;height:2.4rem;border-radius:2px;
  background:var(--red);color:var(--paper);
  font-family:var(--font-serif);font-weight:900;
  border:1px solid rgba(233,185,73,.7);
}
.tag{
  display:inline-block;padding:.15rem .55rem;border-radius:2px;
  font-size:12px;letter-spacing:.14em;
  color:var(--curtain);background:var(--gold-wash);border:1px solid rgba(233,185,73,.7);
}
.section--ink .index-card,.section--green .index-card,.section--curtain .index-card{
  background:#121314;border-color:rgba(233,185,73,.28);border-top-color:var(--gold);
}
.section--ink .index-card__num,.section--green .index-card__num,.section--curtain .index-card__num{color:var(--paper)}
.section--ink .index-card__text,.section--green .index-card__text,.section--curtain .index-card__text{color:rgba(246,241,230,.68)}

/* ============ 13. 标签切换 ============ */
.tabs__list{display:flex;flex-wrap:wrap;gap:.25rem;border-bottom:1px solid var(--line);margin-bottom:1.5rem}
.tabs__tab{
  appearance:none;background:transparent;border:0;border-bottom:2px solid transparent;border-radius:0;
  padding:.7rem 1.1rem;font-size:15px;letter-spacing:.08em;color:var(--stone);cursor:pointer;
  transition:color .22s var(--ease),border-color .22s var(--ease),background-color .22s var(--ease);
}
.tabs__tab:hover{color:var(--ink);background:rgba(233,185,73,.16)}
.tabs__tab[aria-selected="true"]{color:var(--red);border-bottom-color:var(--red);font-weight:500}
.tabs__panel{padding-top:.25rem}
.tabs__panel[hidden]{display:none}
.section--ink .tabs__list,.section--green .tabs__list,.section--curtain .tabs__list{border-bottom-color:rgba(233,185,73,.3)}
.section--ink .tabs__tab,.section--green .tabs__tab,.section--curtain .tabs__tab{color:rgba(246,241,230,.6)}

/* ============ 14. 显现 ============ */
[data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .32s var(--ease),transform .32s var(--ease)}
[data-reveal].is-visible{opacity:1;transform:none}

/* ============ 15. 响应式 ============ */
@media (max-width:1080px){
  .grid--split,.grid--split-reverse{grid-template-columns:1fr}
  .grid--thirds{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:980px){
  .masthead__inner{
    grid-template-columns:minmax(0,1fr) auto;
    grid-template-areas:"brand toggle" "nav nav";
    gap:.5rem;padding-block:.85rem;
  }
  .masthead__cta{display:none}
  .nav-toggle{display:inline-flex;grid-area:toggle;justify-self:end}
  .site-nav{
    justify-self:stretch;width:100%;display:none;
    margin-top:.5rem;padding-top:.5rem;
    border-top:1px solid var(--line-gold);
  }
  .site-nav[data-open]{display:block}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .site-nav__item{border-bottom:1px solid var(--line)}
  .site-nav__item:last-child{border-bottom:0}
  .site-nav__link{display:block;padding:.85rem .25rem;font-size:16px}
  .site-nav__link::after{display:none}
  .site-nav__link[aria-current="page"]::before{
    content:"";display:inline-block;width:6px;height:6px;margin-right:.6rem;
    vertical-align:middle;background:var(--red);
  }
}
@media (max-width:760px){
  body{font-size:16px}
  .grid--halves,.grid--thirds{grid-template-columns:1fr}
  .footer__grid{grid-template-columns:1fr}
  .section-head{grid-template-columns:minmax(0,1fr);gap:.35rem}
  .section-head__note{grid-column:1}
  .footer__bottom{flex-direction:column;align-items:flex-start}
}

/* ============ 16. 降低动效 ============ */
@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}
  .site-header__progress-bar{transition:none}
}