/* =====================================================================
   九五至尊官网 · 共享样式表 /assets/site.css
   长卷分栏 · 帝王紫与鎏金 · 切角与细金线
   ===================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --purple:#3A1F5C;
  --purple-deep:#23113A;
  --purple-abyss:#150A24;
  --gold:#C9A227;
  --gold-light:#E8C96A;
  --gold-ink:#8A6C10;
  --gold-dim:rgba(201,162,39,.34);
  --gold-hair:rgba(201,162,39,.20);
  --cinnabar:#B23A2E;
  --ink:#0F0D12;
  --ink-soft:#3B3640;
  --rice:#F6F1E7;
  --rice-deep:#EFE7D8;
  --mist:#D8D2C8;
  --jade:#2F6F6B;
  --bronze:#7A5A3A;

  --font-display:'Songti SC','Noto Serif SC','Source Han Serif SC','SimSun',serif;
  --font-body:'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
  --font-mono:'SFMono-Regular',Consolas,'Liberation Mono',Menlo,monospace;

  --shell:1240px;
  --gutter:clamp(1.15rem,4.5vw,3.5rem);
  --header-h:66px;
  --dur:200ms;
  --ease:cubic-bezier(.2,.7,.3,1);
  --cut:14px;
  --shadow-raise:0 12px 30px -20px rgba(15,13,18,.6);
}

/* ---------- 2. 重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd,ul,ol,pre{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{max-width:100%;display:block}
button{background:none;border:0;font:inherit;color:inherit;cursor:pointer}
a{color:inherit;text-decoration:none}
[id]{scroll-margin-top:calc(var(--header-h) + 1.25rem)}

/* ---------- 3. 中文排版与页面基底 ---------- */
body{
  min-height:100vh;
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  color:var(--ink);
  background-color:var(--rice);
  background-image:linear-gradient(180deg,#FBF7EF 0%,var(--rice) 34%,var(--rice-deep) 100%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body.is-nav-open{overflow:hidden}

h1,h2,h3,h4{font-family:var(--font-display);font-weight:700;line-height:1.28;letter-spacing:.01em;color:var(--ink)}
h1{font-size:clamp(2.1rem,5.2vw,3.6rem)}
h2{font-size:clamp(1.5rem,3vw,2.2rem)}
h3{font-size:clamp(1.1rem,2vw,1.36rem)}
h4{font-size:1.02rem}
p{orphans:2;widows:2}

:focus-visible{outline:2px solid var(--gold);outline-offset:3px}
.site-header :focus-visible,.site-footer :focus-visible{outline-color:var(--gold-light)}

.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. 容器与色带 ---------- */
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
#main-content{display:block}

.section{padding:clamp(2.6rem,6.5vw,5.2rem) 0;border-top:1px solid var(--gold-hair)}
.section:first-of-type{border-top:0}
.band-plum{
  background:linear-gradient(180deg,var(--purple) 0%,var(--purple-deep) 100%);
  color:rgba(246,241,231,.84);
  border-top-color:var(--gold-dim);
}
.band-ink{
  background:linear-gradient(180deg,var(--purple-deep) 0%,var(--purple-abyss) 100%);
  color:rgba(246,241,231,.84);
  border-top-color:var(--gold-dim);
}
.band-plum h2,.band-plum h3,.band-ink h2,.band-ink h3{color:var(--rice)}
.band-rice{background:rgba(255,253,248,.7)}

/* ---------- 5. 章节头部与长卷双栏 ---------- */
.section-head{display:grid;gap:.7rem;margin-bottom:clamp(1.4rem,3vw,2.4rem)}
.section-index{
  font-family:var(--font-mono);font-size:.74rem;letter-spacing:.24em;
  color:var(--gold-ink);text-transform:uppercase;
}
.section-title{font-size:clamp(1.55rem,3vw,2.4rem)}
.section-lead{max-width:62ch;font-size:1rem;color:var(--ink-soft)}
.band-plum .section-lead,.band-ink .section-lead{color:rgba(246,241,231,.74)}
.band-plum .section-index,.band-ink .section-index{color:var(--gold-light)}

.eyebrow{
  display:inline-flex;align-items:center;gap:.6rem;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.24em;
  text-transform:uppercase;color:var(--gold-ink);
}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--gold);flex:none}
.band-plum .eyebrow,.band-ink .eyebrow{color:var(--gold-light)}

.rule-gold{
  height:1px;border:0;margin:clamp(1.4rem,3vw,2.2rem) 0;
  background:linear-gradient(90deg,var(--gold-dim),rgba(201,162,39,0));
}

.chapter{display:grid;gap:clamp(1.2rem,3vw,2rem)}
.chapter-aside{display:grid;gap:.5rem;align-content:start}
.chapter-index{
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.28em;color:var(--gold);
}
.chapter-title{font-size:clamp(1.3rem,2.4vw,1.9rem)}
.chapter-note{font-size:.94rem;color:var(--bronze);max-width:24ch}
.band-plum .chapter-note,.band-ink .chapter-note{color:rgba(232,201,106,.8)}
.chapter-body{display:grid;gap:clamp(1rem,2.4vw,1.6rem);min-width:0}

/* ---------- 6. 网格 ---------- */
.grid-2,.grid-3,.grid-4{display:grid;gap:clamp(1rem,2.4vw,1.6rem);grid-template-columns:minmax(0,1fr)}
@media (min-width:700px){
  .grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:1024px){
  .grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
  .grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
}

/* ---------- 7. 按钮 ---------- */
.btn{
  position:relative;display:inline-flex;align-items:center;justify-content:center;gap:.45rem;
  padding:.62rem 1.05rem;
  font-family:var(--font-mono);font-size:.78rem;font-weight:600;letter-spacing:.12em;
  line-height:1;white-space:nowrap;
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
  transition:transform var(--dur) var(--ease),background-color var(--dur) var(--ease),color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.btn-gold{background:linear-gradient(135deg,var(--gold-light),var(--gold));color:var(--purple-abyss)}
.btn-gold:hover{background:linear-gradient(135deg,#F3DB92,var(--gold-light));transform:translateY(-1px)}
.btn-ghost{background:rgba(21,10,36,.35);color:var(--gold-light);box-shadow:inset 0 0 0 1px var(--gold-dim)}
.btn-ghost:hover{background:rgba(201,162,39,.14);color:#FBE9C8;box-shadow:inset 0 0 0 1px var(--gold);transform:translateY(-1px)}
.btn-sm{padding:.46rem .78rem;font-size:.7rem;letter-spacing:.1em}
.btn:focus-visible{outline:none;box-shadow:inset 0 0 0 2px var(--gold-light),inset 0 0 0 4px rgba(21,10,36,.85)}

/* ---------- 8. 站点头部 ---------- */
.site-header{
  position:sticky;top:0;z-index:70;
  background:linear-gradient(180deg,var(--purple) 0%,var(--purple-deep) 100%);
  border-bottom:1px solid var(--gold-dim);
  color:var(--rice);
}
.site-header::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,rgba(201,162,39,0),var(--gold-light),rgba(201,162,39,0));
  opacity:.55;
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;gap:1.5rem;
  min-height:var(--header-h);
}

/* 品牌 */
.brand{min-width:0}
.brand-link{display:inline-flex;align-items:center;gap:.7rem;color:inherit}
.brand-seal{
  display:grid;place-items:center;flex:none;
  width:34px;height:34px;
  background:var(--cinnabar);color:#FBE9C8;
  font-family:var(--font-display);font-size:1.02rem;font-weight:700;
  box-shadow:inset 0 0 0 1px rgba(246,241,231,.42);
  clip-path:polygon(6px 0,100% 0,100% calc(100% - 6px),calc(100% - 6px) 100%,0 100%,0 6px);
}
.brand-text{display:flex;flex-direction:column;line-height:1.14;min-width:0}
.brand-name{
  font-family:var(--font-display);font-size:1.1rem;font-weight:700;letter-spacing:.14em;
  color:var(--rice);transition:color var(--dur) var(--ease);
}
.brand-sub{font-family:var(--font-mono);font-size:.6rem;letter-spacing:.26em;color:var(--gold-light);text-transform:uppercase}
.brand-link:hover .brand-name{color:var(--gold-light)}

/* 主导航 */
.site-nav{display:flex;align-items:center;gap:clamp(.8rem,2.2vw,2.2rem);min-width:0}
.nav-list{
  display:flex;align-items:center;gap:clamp(.35rem,1.5vw,1.35rem);
  counter-reset:navidx;
}
.nav-list li{counter-increment:navidx}
.nav-link{
  position:relative;display:inline-flex;align-items:baseline;gap:.42rem;
  padding:.55rem .2rem;
  font-size:.95rem;letter-spacing:.05em;
  color:rgba(246,241,231,.82);
  transition:color var(--dur) var(--ease);
}
.nav-link::before{
  content:counter(navidx,decimal-leading-zero);
  font-family:var(--font-mono);font-size:.62rem;letter-spacing:.06em;
  color:var(--gold);opacity:.8;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:100%;bottom:.22rem;height:1px;
  background:var(--gold-light);
  transition:right var(--dur) var(--ease);
}
.nav-link:hover{color:var(--gold-light)}
.nav-link:hover::after{right:0}
.nav-link[aria-current="page"]{color:var(--gold-light)}
.nav-link[aria-current="page"]::after{right:0;background:var(--gold)}

.nav-actions{
  display:flex;align-items:center;gap:.6rem;
  padding-left:clamp(.6rem,1.6vw,1.4rem);
  border-left:1px solid var(--gold-hair);
}

/* 移动菜单按钮 */
.nav-toggle{
  display:none;align-items:center;gap:.55rem;
  padding:.5rem .7rem;
  color:var(--gold-light);
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.16em;
  box-shadow:inset 0 0 0 1px var(--gold-dim);
  clip-path:polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px);
}
.nav-toggle-lines{display:inline-flex;flex-direction:column;justify-content:center;gap:4px;width:16px;flex:none}
.nav-toggle-lines span{
  display:block;height:1px;background:currentColor;
  transition:transform var(--dur) var(--ease),width var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.nav-toggle-lines span:last-child{width:62%}
.nav-toggle[aria-expanded="true"] .nav-toggle-lines span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-lines span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-lines span:nth-child(3){width:100%;transform:translateY(-5px) rotate(-45deg)}

/* 跳转链接 */
.skip-link{
  position:absolute;left:var(--gutter);top:-4rem;z-index:80;
  padding:.55rem 1rem;
  background:var(--gold);color:var(--purple-abyss);
  font-family:var(--font-mono);font-size:.74rem;letter-spacing:.12em;
  clip-path:polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px);
  transition:top var(--dur) var(--ease);
}
.skip-link:focus{top:.55rem}

/* 滚动进度 */
.scroll-progress{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:rgba(201,162,39,.16);
  pointer-events:none;
}
.scroll-progress-bar{
  display:block;width:100%;height:100%;
  background:linear-gradient(90deg,var(--gold),var(--gold-light));
  transform:scaleX(0);transform-origin:left center;
}

/* ---------- 9. 站点页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(2.6rem,7vw,5rem);
  padding:clamp(2.4rem,6vw,4.4rem) 0 1.6rem;
  background:linear-gradient(180deg,var(--purple-deep) 0%,var(--purple-abyss) 100%);
  color:rgba(246,241,231,.78);
  border-top:1px solid var(--gold-dim);
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:2px;
  background:linear-gradient(90deg,rgba(201,162,39,0),var(--gold),rgba(201,162,39,0));
  opacity:.75;
}
.footer-grid{
  display:grid;gap:clamp(1.6rem,4vw,3rem);
  grid-template-columns:minmax(0,1fr);
  padding-bottom:clamp(1.6rem,4vw,2.6rem);
  border-bottom:1px solid var(--gold-hair);
}
.footer-brand .brand-link{align-items:flex-start}
.footer-lead{margin-top:1rem;max-width:36ch;font-size:.94rem;color:rgba(246,241,231,.7)}
.footer-motto{
  margin-top:.9rem;padding-left:.85rem;
  border-left:2px solid var(--cinnabar);
  font-family:var(--font-display);font-size:.98rem;color:var(--gold-light);
}
.footer-col{min-width:0}
.footer-col-title{
  margin-bottom:.9rem;
  font-family:var(--font-mono);font-size:.7rem;font-weight:600;letter-spacing:.22em;
  color:var(--gold);text-transform:uppercase;
}
.footer-links li + li{margin-top:.55rem}
.footer-links a{
  display:inline-block;font-size:.94rem;
  color:rgba(246,241,231,.78);
  transition:color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.footer-links a:hover{color:var(--gold-light);transform:translateX(4px)}

.contact-list li{
  display:grid;grid-template-columns:52px minmax(0,1fr);gap:.6rem;
  padding:.5rem 0;
  border-bottom:1px dashed rgba(201,162,39,.18);
}
.contact-list li:last-child{border-bottom:0}
.contact-label{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.14em;color:var(--gold)}
.contact-value{font-size:.92rem;color:rgba(246,241,231,.78);word-break:break-word}

.footer-base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:1rem;
  padding-top:1.5rem;
}
.footer-seal{
  display:inline-flex;align-items:center;gap:.55rem;
  padding:.36rem .72rem;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.1em;
  color:var(--gold-light);
  box-shadow:inset 0 0 0 1px var(--gold-dim);
  clip-path:polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px);
}
.seal-mark{
  display:grid;place-items:center;flex:none;
  width:20px;height:20px;
  background:var(--cinnabar);color:#FBE9C8;
  font-family:var(--font-display);font-size:.72rem;
}
.footer-copy{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.08em;color:rgba(246,241,231,.55)}

/* ---------- 10. 通用内容组件 ---------- */
.panel{
  position:relative;
  padding:clamp(1.1rem,2.6vw,1.7rem);
  background:#FFFDF8;
  border:1px solid var(--mist);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.panel-cut{
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
}
.panel:hover{transform:translateY(-3px);border-color:var(--gold);box-shadow:var(--shadow-raise)}
.panel-title{
  font-family:var(--font-display);font-size:1.08rem;font-weight:700;
  color:var(--ink);margin-bottom:.5rem;
}
.band-plum .panel,.band-ink .panel{
  background:rgba(246,241,231,.05);
  border-color:var(--gold-hair);
  color:rgba(246,241,231,.82);
}
.band-plum .panel-title,.band-ink .panel-title{color:var(--rice)}
.band-plum .panel:hover,.band-ink .panel:hover{background:rgba(201,162,39,.1);border-color:var(--gold)}

.index-list{border-top:1px solid var(--gold-hair)}
.index-item{
  display:grid;grid-template-columns:60px minmax(0,1fr);gap:1rem;
  padding:.95rem .3rem;
  border-bottom:1px solid var(--gold-hair);
  transition:background-color var(--dur) var(--ease),padding-left var(--dur) var(--ease);
}
.index-item:hover{background:rgba(201,162,39,.08);padding-left:.7rem}
.index-num{font-family:var(--font-mono);font-size:.76rem;color:var(--gold-ink);padding-top:.3rem}
.index-text{font-size:1rem;color:var(--ink-soft);min-width:0}
.band-plum .index-item,.band-ink .index-item{border-color:rgba(201,162,39,.22)}
.band-plum .index-item:hover,.band-ink .index-item:hover{background:rgba(201,162,39,.12)}
.band-plum .index-num,.band-ink .index-num{color:var(--gold-light)}
.band-plum .index-text,.band-ink .index-text{color:rgba(246,241,231,.8)}

.tag{
  display:inline-flex;align-items:center;gap:.35rem;
  padding:.22rem .6rem;
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.08em;
  color:var(--bronze);
  background:rgba(122,90,58,.08);
  border:1px solid rgba(122,90,58,.26);
}
.tag--gold{color:var(--gold-ink);background:rgba(201,162,39,.12);border-color:rgba(201,162,39,.4)}
.tag--cinnabar{color:var(--cinnabar);background:rgba(178,58,46,.09);border-color:rgba(178,58,46,.32)}
.tag--jade{color:var(--jade);background:rgba(47,111,107,.09);border-color:rgba(47,111,107,.32)}

.breadcrumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:.5rem;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.1em;color:var(--bronze);
}
.breadcrumbs li{display:inline-flex;align-items:center;gap:.5rem}
.breadcrumbs li + li::before{content:"/";color:var(--gold)}
.breadcrumbs a{transition:color var(--dur) var(--ease)}
.breadcrumbs a:hover{color:var(--cinnabar)}
.breadcrumbs [aria-current="page"]{color:var(--purple)}
.band-plum .breadcrumbs,.band-ink .breadcrumbs{color:rgba(246,241,231,.6)}
.band-plum .breadcrumbs a:hover,.band-ink .breadcrumbs a:hover{color:var(--gold-light)}
.band-plum .breadcrumbs [aria-current="page"],.band-ink .breadcrumbs [aria-current="page"]{color:var(--gold-light)}

.prose{max-width:74ch;font-size:1.02rem;line-height:1.85;color:var(--ink-soft)}
.prose > * + *{margin-top:1.05em}
.prose h2{font-size:clamp(1.3rem,2.4vw,1.7rem);color:var(--ink);padding-top:.4em;border-top:1px solid var(--gold-hair)}
.prose h3{font-size:1.1rem;color:var(--ink)}
.prose a{color:var(--purple);text-decoration:underline;text-decoration-color:var(--gold);text-underline-offset:3px}
.prose a:hover{color:var(--cinnabar)}
.prose ul{list-style:disc;padding-left:1.3rem}
.prose ol{list-style:decimal;padding-left:1.4rem}
.prose li + li{margin-top:.42rem}
.prose blockquote{
  padding:.25rem 0 .25rem 1.05rem;
  border-left:2px solid var(--cinnabar);
  font-family:var(--font-display);color:var(--bronze);
}
.prose code{
  font-family:var(--font-mono);font-size:.86em;
  background:rgba(58,31,92,.08);padding:.12em .38em;
}
.prose hr{height:1px;border:0;background:var(--gold-hair)}
.band-plum .prose,.band-ink .prose{color:rgba(246,241,231,.8)}
.band-plum .prose h2,.band-plum .prose h3,.band-ink .prose h2,.band-ink .prose h3{color:var(--rice)}
.band-plum .prose a,.band-ink .prose a{color:var(--gold-light)}

/* ---------- 11. 图片容器基础规则 ---------- */
.media-frame{
  position:relative;display:block;overflow:hidden;
  aspect-ratio:16 / 10;
  border:1px solid var(--gold-dim);
  background:
    repeating-linear-gradient(45deg,rgba(58,31,92,.07) 0 10px,rgba(58,31,92,0) 10px 20px),
    linear-gradient(160deg,var(--rice-deep),var(--mist));
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
}
.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-ph{
  display:grid;place-items:center;
  width:100%;height:100%;padding:1rem;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.2em;
  color:var(--bronze);text-align:center;
}

/* ---------- 12. 显现协议 ---------- */
[data-reveal]{
  opacity:0;transform:translateY(14px);
  transition:opacity 420ms var(--ease),transform 420ms var(--ease);
}
[data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 13. 响应式 ---------- */
@media (max-width:1240px){
  .nav-link{font-size:.87rem}
  .nav-link::before{font-size:.58rem}
  .btn{padding:.54rem .82rem;font-size:.74rem}
  .brand-sub{display:none}
}

@media (min-width:960px){
  .chapter{grid-template-columns:minmax(200px,3fr) minmax(0,9fr);gap:clamp(2rem,5vw,4rem)}
  .chapter-aside{position:sticky;top:calc(var(--header-h) + 1.5rem)}
  .section-head{grid-template-columns:minmax(200px,3fr) minmax(0,9fr);gap:clamp(2rem,5vw,4rem);align-items:end}
  .section-head .section-index{grid-column:1}
  .section-head .section-title,.section-head .section-lead{grid-column:2}
  .section-head .section-title{grid-row:1}
  .section-head .section-lead{grid-row:2}
  .section-head .section-index{grid-row:1 / span 2;align-self:start;padding-top:.7rem}
  .footer-grid{grid-template-columns:minmax(0,1.6fr) minmax(0,1fr) minmax(0,1.35fr) minmax(0,1fr)}
}

@media (max-width:1024px){
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:fixed;top:0;left:0;right:0;bottom:0;z-index:60;
    display:flex;flex-direction:column;align-items:stretch;justify-content:flex-start;gap:0;
    padding:calc(var(--header-h) + 1.7rem) var(--gutter) 2.4rem;
    background:linear-gradient(165deg,var(--purple) 0%,var(--purple-abyss) 100%);
    border-top:1px solid var(--gold-dim);
    overflow-y:auto;
    transform:translateX(100%);
    visibility:hidden;
    transition:transform var(--dur) var(--ease),visibility var(--dur) var(--ease);
  }
  .site-nav[data-open="true"]{transform:translateX(0);visibility:visible}
  .nav-list{flex-direction:column;align-items:stretch;gap:0;width:100%}
  .nav-list li{border-bottom:1px solid var(--gold-hair)}
  .nav-link{width:100%;justify-content:flex-start;padding:1rem .2rem;font-size:1.06rem}
  .nav-link::after{bottom:.6rem}
  .nav-actions{flex-direction:column;align-items:stretch;gap:.7rem;margin-top:1.8rem;padding-left:0;border-left:0}
  .nav-actions .btn{width:100%;padding:.88rem 1rem;font-size:.8rem}
}

@media (max-width:700px){
  body{font-size:16px;background-attachment:scroll}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:1.8rem}
  .footer-base{justify-content:flex-start;gap:.7rem}
  .index-item{grid-template-columns:46px minmax(0,1fr);gap:.75rem}
}

@media (min-width:701px) and (max-width:959px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}

/* ---------- 14. 减弱动效 ---------- */
@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}
  .panel:hover,.btn:hover,.footer-links a:hover{transform:none}
}