/* ===== 1. 变量 ===== */
:root{
  --ink:#0D0F12;
  --stone:#171A1F;
  --gold:#C8A24A;
  --gold-bright:#E6CB84;
  --cinnabar:#B54432;
  --peacock:#2B7A74;
  --ivory:#F4EEE2;
  --mist:#9A9387;
  --pattern:#5E4E2C;
  --electric:#49D7C8;

  --line:rgba(200,162,74,.30);
  --line-soft:rgba(200,162,74,.15);
  --ivory-80:rgba(244,238,226,.82);
  --ivory-60:rgba(244,238,226,.62);

  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",Georgia,serif;
  --sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --shell:1240px;
  --gutter:clamp(18px,4vw,56px);
  --sp-1:8px;--sp-2:16px;--sp-3:24px;--sp-4:40px;--sp-5:64px;--sp-6:96px;
  --dur:220ms;
  --ease:cubic-bezier(.22,.61,.36,1);
  --radius:2px;
}

/* ===== 2. Reset ===== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
body{margin:0;min-height:100vh}
img,svg{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit;background:none;border:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
main [id]{scroll-margin-top:132px}
::selection{background:var(--gold);color:var(--ink)}
:focus-visible{outline:2px solid var(--electric);outline-offset:3px}

/* ===== 3. 中文排版与底色 ===== */
body{
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  color:var(--ivory);
  background-color:var(--ink);
  background-image:
    repeating-linear-gradient(0deg,rgba(94,78,44,.09) 0 1px,transparent 1px 5px),
    radial-gradient(1100px 620px at 86% -10%,rgba(200,162,74,.16),transparent 62%),
    radial-gradient(880px 540px at -6% 108%,rgba(43,122,116,.13),transparent 66%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
}
@media (max-width:720px){body{background-attachment:scroll}}
h1,h2,h3,h4,h5{font-family:var(--serif);font-weight:800;line-height:1.22;letter-spacing:.015em;color:var(--ivory);margin:0 0 .6em}
h1{font-size:clamp(34px,5.2vw,68px)}
h2{font-size:clamp(24px,3vw,38px)}
h3{font-size:clamp(19px,2vw,24px)}
h4{font-size:clamp(16px,1.4vw,19px)}
p{margin:0 0 1em}
strong{color:var(--gold-bright);font-weight:700}
.mono{font-family:var(--mono);letter-spacing:.12em}
.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ===== 4. 布局容器 ===== */
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:clamp(40px,6vw,88px)}
.section--tight{padding-block:clamp(24px,3.4vw,44px)}
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
@media (max-width:760px){.grid--2{grid-template-columns:minmax(0,1fr)}}
.prose p{max-width:36em;color:var(--ivory-80)}
.prose p:last-child{margin-bottom:0}

/* ===== 5. 跳转链接 ===== */
.skip-link{
  position:fixed;top:-100px;left:16px;z-index:200;
  display:inline-block;padding:10px 18px;
  background:var(--gold);color:#14110A;font-weight:700;
  font-family:var(--mono);font-size:12px;letter-spacing:.14em;
  border:1px solid var(--gold-bright);
  transition:top var(--dur) var(--ease);
}
.skip-link:focus{top:14px}

/* ===== 6. 头部命令栏 ===== */
.site-header{
  position:sticky;top:0;z-index:60;
  background:linear-gradient(180deg,rgba(13,15,18,.985),rgba(13,15,18,.94));
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  box-shadow:0 12px 30px rgba(0,0,0,.45);
}
.header-rail{
  background:linear-gradient(90deg,rgba(94,78,44,.38),rgba(13,15,18,0) 58%);
  border-bottom:1px solid var(--line-soft);
}
.header-rail__inner{
  display:flex;align-items:center;gap:var(--sp-2);
  padding-block:6px;
  font-family:var(--mono);font-size:10px;letter-spacing:.26em;
  color:var(--mist);
}
.rail-mark{
  display:inline-block;padding:1px 6px;
  border:1px solid var(--line);color:var(--gold);
  font-size:10px;letter-spacing:.2em;
}
.rail-text{margin:0}
.rail-meta{margin:0 0 0 auto;white-space:nowrap;color:var(--ivory-60)}

.header-main{
  display:grid;
  grid-template-columns:auto 1fr auto;
  align-items:center;
  gap:clamp(12px,2vw,32px);
  padding-block:14px;
}

/* 品牌印记 */
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand__seal{
  position:relative;display:grid;place-items:center;
  width:46px;height:46px;flex:0 0 auto;
  border:1px solid var(--gold);
  background:linear-gradient(150deg,rgba(200,162,74,.24),rgba(13,15,18,.35));
  box-shadow:inset 0 0 0 1px rgba(13,15,18,.6),0 6px 18px rgba(0,0,0,.45);
  color:var(--gold-bright);
  font-family:var(--serif);font-weight:900;font-size:22px;line-height:1;
}
.brand__seal::after{
  content:"";position:absolute;right:-5px;bottom:-5px;
  width:14px;height:14px;
  border-right:1px solid var(--gold);border-bottom:1px solid var(--gold);
}
.brand__text{display:flex;flex-direction:column;line-height:1.1;min-width:0}
.brand__name{
  font-family:var(--serif);font-weight:800;
  font-size:clamp(17px,1.6vw,21px);letter-spacing:.14em;color:var(--ivory);
  white-space:nowrap;
}
.brand__sub{
  margin-top:4px;font-family:var(--mono);font-size:9px;
  letter-spacing:.26em;color:var(--mist);white-space:nowrap;
}

/* 导航 */
.primary-nav{justify-self:center;min-width:0}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-link{
  position:relative;display:flex;align-items:baseline;gap:6px;
  padding:10px 10px;color:var(--ivory-80);
  font-size:13.5px;letter-spacing:.06em;white-space:nowrap;
  transition:color var(--dur) var(--ease);
}
.nav-link__idx{
  font-family:var(--mono);font-size:10px;letter-spacing:0;
  color:var(--gold);opacity:.68;transition:opacity var(--dur) var(--ease),color var(--dur) var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:10px;right:10px;bottom:4px;height:1px;
  background:var(--gold);transform:scaleX(0);transform-origin:left center;
  transition:transform var(--dur) var(--ease),background var(--dur) var(--ease);
}
.nav-link:hover,.nav-link:focus-visible{color:var(--gold-bright)}
.nav-link:hover::after,.nav-link:focus-visible::after{transform:scaleX(1)}
.nav-link:hover .nav-link__idx{opacity:1}
.nav-link[aria-current="page"]{color:var(--gold-bright)}
.nav-link[aria-current="page"] .nav-link__idx{color:var(--electric);opacity:1}
.nav-link[aria-current="page"]::after{
  height:2px;background:var(--electric);transform:scaleX(1);
  box-shadow:0 0 10px rgba(73,215,200,.55);
}

/* 头部右侧动作区 */
.header-actions{display:flex;align-items:center;gap:10px;justify-self:end}
.search-pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 14px;
  border:1px solid var(--line);
  background:rgba(244,238,226,.04);
  color:var(--ivory-60);
  font-family:var(--mono);font-size:11px;letter-spacing:.2em;
  white-space:nowrap;
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.search-pill:hover,.search-pill:focus-visible{
  border-color:var(--gold);color:var(--gold-bright);background:rgba(200,162,74,.10);
}
.search-pill__icon{
  position:relative;display:inline-block;
  width:11px;height:11px;border:1px solid currentColor;border-radius:50%;
}
.search-pill__icon::after{
  content:"";position:absolute;right:-4px;bottom:-3px;
  width:6px;height:1px;background:currentColor;transform:rotate(45deg);
}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;
  padding:10px 18px;
  background:linear-gradient(120deg,var(--gold),#B8933F);
  border:1px solid var(--gold-bright);
  color:#14110A;font-size:13px;font-weight:700;letter-spacing:.08em;white-space:nowrap;
  box-shadow:0 6px 18px rgba(200,162,74,.18);
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.nav-cta:hover,.nav-cta:focus-visible{transform:translateY(-1px);box-shadow:0 10px 26px rgba(200,162,74,.32)}

/* 移动导航按钮 */
.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:10px 12px;
  border:1px solid var(--line);
  color:var(--ivory);cursor:pointer;
  font-family:var(--mono);font-size:11px;letter-spacing:.2em;
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--gold);color:var(--gold-bright)}
.nav-toggle__bar{position:relative;display:block;width:18px;height:1px;background:currentColor;transition:background var(--dur) var(--ease)}
.nav-toggle__bar::before,.nav-toggle__bar::after{
  content:"";position:absolute;left:0;width:18px;height:1px;background:currentColor;
  transition:transform var(--dur) var(--ease),top var(--dur) var(--ease);
}
.nav-toggle__bar::before{top:-5px}
.nav-toggle__bar::after{top:5px}
.site-header[data-open] .nav-toggle__bar{background:transparent}
.site-header[data-open] .nav-toggle__bar::before{top:0;transform:rotate(45deg)}
.site-header[data-open] .nav-toggle__bar::after{top:0;transform:rotate(-45deg)}

/* 滚动进度 */
.scroll-progress{
  position:absolute;left:0;bottom:-1px;height:2px;width:0;
  background:linear-gradient(90deg,var(--peacock),var(--gold) 62%,var(--electric));
  box-shadow:0 0 12px rgba(200,162,74,.5);
  pointer-events:none;
}

/* ===== 7. 头部响应式 ===== */
@media (max-width:1180px){
  .search-pill__label{display:none}
  .search-pill{padding:10px 12px}
}
@media (max-width:1080px){
  .nav-cta{display:none}
  .nav-link{padding-inline:8px;font-size:13px}
}
@media (max-width:1024px){
  .header-main{grid-template-columns:minmax(0,1fr) auto;gap:12px}
  .nav-toggle{display:inline-flex}
  .primary-nav{
    position:absolute;left:0;right:0;top:100%;
    display:block;
    max-height:min(74vh,580px);overflow-y:auto;
    padding:10px var(--gutter) 22px;
    background:linear-gradient(180deg,var(--stone),var(--ink) 92%);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    box-shadow:0 26px 44px rgba(0,0,0,.6);
    opacity:0;visibility:hidden;transform:translateY(-10px);
    transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),visibility var(--dur) var(--ease);
  }
  .site-header[data-open] .primary-nav{opacity:1;visibility:visible;transform:translateY(0)}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-item+.nav-item{border-top:1px solid var(--line-soft)}
  .nav-link{padding:15px 6px;font-size:15px;gap:14px;justify-content:flex-start}
  .nav-link__idx{font-size:11px}
  .nav-link::after{display:none}
  .nav-link[aria-current="page"]{
    background:rgba(200,162,74,.08);
    box-shadow:inset 2px 0 0 var(--gold);
    padding-left:12px;
  }
}
@media (max-width:720px){
  .rail-meta{display:none}
  .header-rail__inner{font-size:9px;letter-spacing:.2em}
  .brand__sub{display:none}
  .brand__seal{width:40px;height:40px;font-size:19px}
  .nav-toggle__label{display:none}
  main [id]{scroll-margin-top:112px}
}

/* ===== 8. 页脚 ===== */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,110px);
  background:
    repeating-linear-gradient(0deg,rgba(94,78,44,.10) 0 1px,transparent 1px 6px),
    linear-gradient(180deg,rgba(23,26,31,.96),var(--ink) 62%);
  border-top:1px solid var(--line);
  color:var(--ivory);
}
.site-footer::before{
  content:"";position:absolute;inset:0 0 auto 0;height:3px;
  background:linear-gradient(90deg,
    var(--gold) 0 24%,
    var(--cinnabar) 24% 36%,
    var(--peacock) 36% 48%,
    rgba(200,162,74,.18) 48% 100%);
}
.footer-top{
  display:grid;
  grid-template-columns:1.45fr 1fr 1fr 1.35fr;
  gap:clamp(20px,3vw,48px);
  padding-block:clamp(40px,6vw,76px) clamp(28px,4vw,52px);
}
.footer-brand__name{
  margin:0 0 10px;
  font-family:var(--serif);font-weight:800;
  font-size:clamp(22px,2.4vw,30px);letter-spacing:.12em;color:var(--ivory);
}
.footer-brand__note{margin:0 0 20px;max-width:26ch;font-size:14px;line-height:1.8;color:var(--mist)}
.footer-col__title{
  margin:0 0 16px;
  font-family:var(--mono);font-size:11px;font-weight:500;
  letter-spacing:.28em;text-transform:uppercase;color:var(--gold);
}
.footer-links{display:grid;gap:10px}
.footer-link{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;color:var(--ivory-80);
  transition:color var(--dur) var(--ease);
}
.footer-link::before{
  content:"";width:10px;height:1px;background:var(--gold);opacity:.5;
  transition:width var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.footer-link:hover,.footer-link:focus-visible{color:var(--gold-bright)}
.footer-link:hover::before,.footer-link:focus-visible::before{width:20px;opacity:1}
.footer-contact{display:grid;gap:16px;font-size:14px}
.contact-item{display:grid;gap:4px}
.contact-item__label{font-family:var(--mono);font-size:10px;letter-spacing:.24em;color:var(--mist)}
.contact-item__row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.contact-item__value{color:var(--ivory);word-break:break-all;transition:color var(--dur) var(--ease)}
a.contact-item__value:hover,a.contact-item__value:focus-visible{color:var(--gold-bright)}
.contact-item__value--plain{color:var(--ivory-80);font-size:13.5px;line-height:1.7;word-break:normal}
.copy-btn{
  padding:3px 8px;cursor:pointer;
  border:1px solid var(--line);background:transparent;
  font-family:var(--mono);font-size:10px;letter-spacing:.16em;color:var(--mist);
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.copy-btn:hover,.copy-btn:focus-visible{color:var(--gold-bright);border-color:var(--gold);background:rgba(200,162,74,.10)}
.copy-status{min-height:1.2em;margin:0;font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--electric)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px 24px;
  align-items:center;justify-content:space-between;
  padding-block:18px 28px;
  border-top:1px solid var(--line-soft);
  font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--mist);
}
.footer-copy{margin:0}
.footer-legal-links{display:flex;flex-wrap:wrap;gap:8px 20px}
.footer-legal-links .footer-link{font-size:12px}
@media (max-width:1000px){
  .footer-top{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:600px){
  .footer-top{grid-template-columns:minmax(0,1fr)}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

/* ===== 9. 通用按钮与标签 ===== */
.btn{
  display:inline-flex;align-items:center;gap:.6em;
  padding:.82em 1.45em;
  border:1px solid var(--line);
  background:transparent;color:var(--gold-bright);
  font-family:var(--mono);font-size:12.5px;letter-spacing:.14em;
  cursor:pointer;
  transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn:hover,.btn:focus-visible{border-color:var(--gold);background:rgba(200,162,74,.12);transform:translateY(-1px)}
.btn--gold{background:linear-gradient(120deg,var(--gold),#B8933F);border-color:var(--gold-bright);color:#14110A;font-weight:700}
.btn--gold:hover,.btn--gold:focus-visible{background:var(--gold-bright);color:#14110A}
.btn--ghost{border-color:var(--line);color:var(--ivory);font-family:var(--sans);font-size:13.5px;letter-spacing:.08em}
.btn--ghost:hover,.btn--ghost:focus-visible{color:var(--gold-bright);border-color:var(--gold)}
.btn--peacock{background:var(--peacock);border-color:var(--peacock);color:var(--ivory)}
.btn--peacock:hover,.btn--peacock:focus-visible{background:#348F88;border-color:#348F88;color:var(--ivory)}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 9px;
  border:1px solid var(--line);
  font-family:var(--mono);font-size:11px;letter-spacing:.14em;
  color:var(--gold-bright);
}
.tag--cinnabar{border-color:rgba(181,68,50,.7);background:rgba(181,68,50,.18);color:#F2C0B6}
.tag--peacock{border-color:rgba(43,122,116,.75);background:rgba(43,122,116,.20);color:#BFEAE5}
.link-gold{
  color:var(--gold-bright);
  border-bottom:1px solid rgba(200,162,74,.55);
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.link-gold:hover,.link-gold:focus-visible{border-color:var(--electric);color:var(--electric)}

/* ===== 10. 编辑型组件 ===== */
.eyebrow{
  margin:0 0 10px;
  font-family:var(--mono);font-size:11px;letter-spacing:.32em;
  text-transform:uppercase;color:var(--gold);
}
.index-num{
  display:block;
  font-family:var(--mono);font-weight:700;
  font-size:clamp(28px,4vw,56px);line-height:1;letter-spacing:-.02em;
  color:var(--gold);
}
.rule{height:1px;border:0;margin:0;background:linear-gradient(90deg,var(--gold),rgba(200,162,74,0))}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:14px 28px;
  margin-bottom:clamp(18px,3vw,34px);
}
.section-head__title{margin:0}
.section-head__aside{margin:0;max-width:34ch;font-size:14px;color:var(--mist)}
.panel{
  padding:clamp(18px,2.4vw,32px);
  background:linear-gradient(160deg,rgba(23,26,31,.96),rgba(13,15,18,.96));
  border:1px solid var(--line);
  box-shadow:0 18px 40px rgba(0,0,0,.32);
}
.panel--accent{border-left:3px solid var(--cinnabar)}
.band{
  background:linear-gradient(90deg,rgba(200,162,74,.13),rgba(43,122,116,.11) 56%,transparent);
  border-top:1px solid var(--line-soft);
  border-bottom:1px solid var(--line-soft);
}
.breadcrumb{font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--mist)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb__item+.breadcrumb__item::before{content:"/";color:rgba(200,162,74,.55)}
.breadcrumb__link{color:var(--mist);transition:color var(--dur) var(--ease)}
.breadcrumb__link:hover,.breadcrumb__link:focus-visible{color:var(--gold-bright)}
.breadcrumb__current{color:var(--gold-bright)}

/* ===== 11. 媒体容器 ===== */
.media-frame{
  position:relative;overflow:hidden;
  aspect-ratio:16 / 10;
  border:1px solid var(--line);
  background:
    repeating-linear-gradient(135deg,rgba(94,78,44,.22) 0 1px,transparent 1px 9px),
    linear-gradient(150deg,#1C2027,#0F1115 68%);
  box-shadow:0 18px 40px rgba(0,0,0,.36);
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,transparent 44%,rgba(13,15,18,.78));
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:4 / 5}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame__caption{
  position:absolute;left:16px;right:16px;bottom:14px;z-index:2;
  font-family:var(--mono);font-size:11px;letter-spacing:.16em;color:var(--gold-bright);
}
.media-grid{display:grid;gap:clamp(12px,1.8vw,20px);grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}

/* ===== 12. 主题筛选 ===== */
.filter-bar{
  display:flex;flex-wrap:wrap;gap:8px;
  padding:12px 0;
  border-top:1px solid var(--line-soft);
  border-bottom:1px solid var(--line-soft);
}
.filter-btn{
  padding:8px 14px;cursor:pointer;
  border:1px solid var(--line);background:transparent;
  font-family:var(--mono);font-size:11px;letter-spacing:.16em;color:var(--mist);
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.filter-btn:hover,.filter-btn:focus-visible{color:var(--gold-bright);border-color:var(--gold)}
.filter-btn[aria-pressed="true"]{background:var(--gold);border-color:var(--gold-bright);color:#14110A;font-weight:700}
.filter-status{margin:12px 0 0;font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--mist)}
.filter-item.is-hidden{display:none}

/* ===== 13. 显现动效 ===== */
[data-reveal]{opacity:0;transform:translateY(16px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
[data-reveal].is-visible{opacity:1;transform:none}

/* ===== 14. 降低动效偏好 ===== */
@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}
  .skip-link{transition:none}
}