/* ==========================================================================
   皇家至尊中心 · /assets/site.css
   共享外壳（命令栏页头 / 三组页脚）与基础组件
   ========================================================================== */

:root{
  --purple-deep:#2E1A47;
  --purple-night:#180D26;
  --purple-mid:#4B2E71;
  --gold:#C8A227;
  --gold-soft:#EBD9A4;
  --cream:#F6F1E7;
  --paper:#FCF8F1;
  --mist:#9FB8C4;
  --mist-deep:#5E7C88;
  --seal:#B4402F;
  --ink:#221C1A;
  --ink-soft:#453C39;
  --line:rgba(34,28,26,.14);
  --line-strong:rgba(34,28,26,.26);
  --font-head:"Source Han Serif SC","Noto Serif SC","Songti SC","STSong",serif;
  --font-body:"Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
  --wrap:1120px;
  --wrap-wide:1280px;
  --measure:720px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0}
img,svg,picture{display:block;max-width:100%}
iframe{max-width:100%}
:focus-visible{outline:2px solid var(--gold);outline-offset:2px;border-radius:2px}
::selection{background:var(--gold-soft);color:var(--purple-night)}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}

/* ---------- 中文排版与基础 ---------- */
body{
  background:var(--cream);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.85;
  font-weight:400;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:var(--font-head);font-weight:700;color:var(--purple-deep);line-height:1.3;letter-spacing:-.01em}
h1{font-size:44px}
h2{font-size:34px}
h3{font-size:26px}
h4{font-size:21px}
strong,b{font-weight:600}
.mono,.idx,.stat-num,.fold__num,.footer__val.mono{font-family:var(--font-mono);font-weight:500;letter-spacing:.04em;font-variant-numeric:tabular-nums}
.u-gold{font-weight:600;text-decoration:underline;text-decoration-color:var(--gold);text-decoration-thickness:2px;text-underline-offset:4px}
.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}
#main-content:focus{outline:none}

/* ---------- 容器 ---------- */
.wrap{width:min(var(--wrap),100% - 44px);margin-inline:auto}
.wrap--wide{width:min(var(--wrap-wide),100% - 44px)}
.section{padding:88px 0}
.section--tight{padding:56px 0}
.section--flush{padding:0 0 88px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:36px}
.rule{height:1px;background:var(--line);border:0;margin:40px 0}
.rule--gold{background:linear-gradient(90deg,var(--gold),rgba(200,162,39,0))}

/* ---------- 标题与文本组件 ---------- */
.title-xl{font-family:var(--font-head);font-weight:700;color:var(--purple-deep);font-size:clamp(30px,4.6vw,44px);line-height:1.24}
.title-lg{font-family:var(--font-head);font-weight:700;color:var(--purple-deep);font-size:clamp(26px,3.4vw,34px);line-height:1.28}
.title-md{font-family:var(--font-head);font-weight:700;color:var(--purple-deep);font-size:clamp(21px,2.4vw,26px);line-height:1.34}
.title-sm{font-family:var(--font-head);font-weight:600;color:var(--purple-deep);font-size:18px;line-height:1.4}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-mono);font-size:12px;font-weight:500;letter-spacing:.18em;color:var(--mist-deep);margin-bottom:14px}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--gold);flex:0 0 auto}
.lede{font-size:19px;line-height:1.8;color:var(--ink-soft)}
.prose{max-width:var(--measure)}
.prose p + p{margin-top:1.2em}
.prose h2{margin:1.6em 0 .6em;font-size:26px}
.prose h3{margin:1.4em 0 .5em;font-size:21px}
.prose ul{margin:1em 0;padding-left:0}
.prose ul li{position:relative;padding-left:20px;margin-bottom:.5em}
.prose ul li::before{content:"";position:absolute;left:0;top:.78em;width:9px;height:1px;background:var(--gold)}
.aside-note{font-size:14px;line-height:1.78;color:var(--mist-deep)}
.stat-num{font-size:26px;color:var(--purple-deep)}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:absolute;left:14px;top:10px;z-index:200;
  transform:translateY(-220%);
  background:var(--gold);color:var(--purple-night);
  padding:10px 18px;border-radius:2px;font-size:14px;font-weight:600;letter-spacing:.04em;
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ==========================================================================
   页头 · 双层命令栏
   ========================================================================== */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--purple-deep);
  color:var(--cream);
  border-bottom:1px solid rgba(200,162,39,.38);
  box-shadow:0 10px 22px -20px rgba(24,13,38,.95);
}
.cmdbar{background:linear-gradient(180deg,#341F52 0%,var(--purple-deep) 100%)}
.cmdbar__inner{display:flex;align-items:center;gap:22px;min-height:62px;transition:min-height .26s var(--ease)}

/* 品牌 */
.brand{display:inline-flex;align-items:center;gap:11px;flex:0 0 auto;color:var(--cream)}
.brand__mark{
  width:32px;height:32px;flex:0 0 auto;
  display:grid;place-items:center;
  background:var(--gold);color:var(--purple-night);
  font-family:var(--font-head);font-size:18px;font-weight:700;line-height:1;
  border-radius:2px;box-shadow:inset 0 0 0 1px rgba(255,255,255,.22);
}
.brand__text{display:flex;flex-direction:column;line-height:1.18}
.brand__name{font-family:var(--font-head);font-size:17px;font-weight:700;letter-spacing:.07em}
.brand__tag{font-size:11px;letter-spacing:.24em;color:rgba(235,217,164,.78)}

/* 主栏索引 */
.primary-nav{margin-left:auto}
.primary-nav__list{display:flex;align-items:center;gap:2px}
.primary-nav__link{
  position:relative;display:inline-flex;align-items:baseline;gap:7px;
  padding:9px 11px 12px;font-size:14px;color:rgba(246,241,231,.74);
  transition:color .18s var(--ease);
}
.primary-nav__link .idx{font-size:10.5px;letter-spacing:.08em;color:var(--gold-soft);opacity:.6}
.primary-nav__link::after{
  content:"";position:absolute;left:11px;right:11px;bottom:6px;height:2px;
  background:var(--gold);transform:scaleX(0);transform-origin:left;
  transition:transform .18s var(--ease);
}
.primary-nav__link:hover{color:var(--cream)}
.primary-nav__link:hover::after{transform:scaleX(1)}
.primary-nav__link[aria-current="page"]{color:var(--gold-soft)}
.primary-nav__link[aria-current="page"] .idx{color:var(--gold);opacity:1}
.primary-nav__link[aria-current="page"]::after{background:var(--gold-soft);transform:scaleX(1)}

/* 移动导航按钮 */
.nav-toggle{display:none;align-items:center;gap:9px;margin-left:auto;padding:8px 13px;border:1px solid rgba(235,217,164,.38);border-radius:2px;font-size:13px;letter-spacing:.08em;color:var(--gold-soft);cursor:pointer;transition:background-color .18s var(--ease)}
.nav-toggle:hover{background:rgba(235,217,164,.12)}
.nav-toggle[aria-expanded="true"]{background:rgba(235,217,164,.16);color:var(--cream)}
.nav-toggle__bars{position:relative;width:16px;height:9px;border-top:2px solid currentColor;border-bottom:2px solid currentColor}
.nav-toggle__label{font-family:var(--font-mono);letter-spacing:.12em}

/* 状态栏 */
.statusbar{
  background:var(--purple-night);
  border-top:1px solid rgba(235,217,164,.18);
  max-height:110px;overflow:hidden;
  opacity:1;visibility:visible;
  transition:max-height .3s var(--ease),opacity .22s var(--ease),visibility .3s linear;
}
.statusbar__inner{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;padding:7px 0}
.statusbar__pulse{display:inline-flex;align-items:center;gap:9px;font-size:12.5px;letter-spacing:.04em;color:rgba(246,241,231,.72)}
.statusbar__pulse .mono{font-size:11.5px;letter-spacing:.12em;color:var(--mist);margin-left:4px;padding-left:10px;border-left:1px solid rgba(159,184,196,.3)}
.pulse-dot{width:7px;height:7px;flex:0 0 auto;border-radius:50%;background:var(--seal);box-shadow:0 0 0 3px rgba(180,64,47,.22);animation:pulse 2.4s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.32}}
.statusbar__actions{display:flex;align-items:center;gap:14px}

/* 档位选择器 */
.tier{display:inline-flex;align-items:center;gap:2px;padding:2px;border:1px solid rgba(235,217,164,.32);border-radius:999px}
.tier__label{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.16em;color:rgba(235,217,164,.62);padding:0 8px 0 10px}
.tier__opt{font-size:12px;padding:3px 11px;border-radius:999px;color:rgba(246,241,231,.72);cursor:pointer;transition:background-color .18s var(--ease),color .18s var(--ease)}
.tier__opt:hover{color:#fff;background:rgba(235,217,164,.14)}
.tier__opt[aria-pressed="true"]{background:var(--gold-soft);color:var(--purple-night);font-weight:600}

/* 滚动进度 */
.scroll-progress{
  position:absolute;left:0;bottom:0;width:100%;height:2px;
  background:linear-gradient(90deg,var(--gold),var(--gold-soft));
  transform:scaleX(var(--progress,0));transform-origin:left;
  pointer-events:none;
}

/* 压缩态 */
.site-header.is-compact .statusbar{max-height:0;opacity:0;visibility:hidden}
.site-header.is-compact .cmdbar__inner{min-height:52px}
.site-header.is-compact .brand__tag{display:none}

/* ==========================================================================
   页脚 · 三组并排窄幅
   ========================================================================== */
.site-footer{
  position:relative;
  margin-top:96px;
  background:var(--purple-night);
  color:rgba(246,241,231,.78);
  border-top:1px solid rgba(200,162,39,.45);
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(200,162,39,.7),transparent);
}
.footer__inner{padding:56px 0 0}
.footer__grid{display:grid;grid-template-columns:1fr 1.35fr 1fr;gap:44px 48px}
.footer__title{
  font-family:var(--font-head);font-size:14px;font-weight:600;letter-spacing:.16em;
  color:var(--gold-soft);padding-bottom:12px;margin-bottom:16px;
  border-bottom:1px solid rgba(235,217,164,.2);
}
.footer__list{display:flex;flex-direction:column;gap:10px;font-size:14px}
.footer__list a{color:rgba(246,241,231,.74);transition:color .18s var(--ease)}
.footer__list a:hover{color:var(--gold-soft)}
.footer__list--links a{display:inline-flex;align-items:baseline;gap:9px}
.footer__list--links a::before{content:"";width:10px;height:1px;background:rgba(200,162,39,.6);flex:0 0 auto;transform:translateY(-4px)}
.footer__list--legal{margin-top:22px;padding-top:18px;border-top:1px dashed rgba(235,217,164,.18)}
.footer__item{display:flex;flex-direction:column;gap:2px}
.footer__key{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.16em;color:var(--mist)}
.footer__val{font-size:14px;color:rgba(246,241,231,.92);word-break:break-word}
.footer__note{font-size:12.5px;line-height:1.75;color:rgba(159,184,196,.9);margin-top:14px;max-width:36em}
.copy-btn{
  align-self:flex-start;margin-top:6px;cursor:pointer;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  padding:3px 10px;border:1px solid rgba(235,217,164,.32);border-radius:2px;
  color:var(--gold-soft);transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.copy-btn:hover{background:rgba(235,217,164,.14)}
.copy-btn.is-done{background:var(--gold-soft);color:var(--purple-night);border-color:var(--gold-soft)}
.footer__bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:44px;padding:16px 0 22px;
  border-top:1px solid rgba(235,217,164,.16);
  font-size:12.5px;color:rgba(246,241,231,.6);
}
.footer__legal .mono{letter-spacing:.06em;color:rgba(159,184,196,.9)}
.to-top{
  display:inline-flex;align-items:center;gap:8px;cursor:pointer;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  padding:6px 13px;border:1px solid rgba(235,217,164,.32);border-radius:2px;
  color:var(--gold-soft);transition:background-color .18s var(--ease);
}
.to-top:hover{background:rgba(235,217,164,.14)}

/* ==========================================================================
   通用按钮
   ========================================================================== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border:1px solid transparent;border-radius:2px;
  font-size:15px;font-weight:500;letter-spacing:.02em;line-height:1.4;
  cursor:pointer;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .18s var(--ease);
}
.btn--sm{padding:6px 14px;font-size:13px}
.btn--gold{background:var(--gold);color:var(--purple-night)}
.btn--gold:hover{background:var(--gold-soft)}
.btn--ghost{border-color:rgba(235,217,164,.5);color:var(--gold-soft)}
.btn--ghost:hover{background:rgba(235,217,164,.14);color:#fff}
.btn--deep{background:var(--purple-deep);color:var(--cream)}
.btn--deep:hover{background:var(--purple-mid)}
.btn--outline{border-color:var(--line-strong);color:var(--purple-deep)}
.btn--outline:hover{background:var(--purple-deep);border-color:var(--purple-deep);color:var(--cream)}

/* ==========================================================================
   基础组件
   ========================================================================== */
.grid{display:grid;gap:24px}
.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:1.35fr 1fr}

.layout-split{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:0}
.layout-split__main{padding-right:44px;min-width:0}
.layout-split__aside{padding-left:34px;border-left:1px solid var(--line);min-width:0}

.card{
  position:relative;background:var(--paper);
  border:1px solid var(--line);border-radius:2px;padding:24px;
}
.card--stack{box-shadow:6px 6px 0 -1px rgba(46,26,71,.06),6px 6px 0 0 var(--line)}
.card--deep{background:var(--purple-deep);border-color:rgba(200,162,39,.42);color:var(--cream)}
.card--deep h2,.card--deep h3,.card--deep h4{color:var(--cream)}
.card--flat{background:transparent;border-color:transparent;padding:0}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:2px 9px;border:1px solid var(--line-strong);border-radius:2px;
  font-size:12px;letter-spacing:.06em;line-height:1.7;
  background:var(--paper);color:var(--ink);
}
.tag--gold{border-color:rgba(200,162,39,.55);background:rgba(235,217,164,.38);color:#6E580F}
.tag--seal{border-color:rgba(180,64,47,.5);background:rgba(180,64,47,.08);color:var(--seal)}
.tag--mist{border-color:rgba(94,124,136,.42);background:rgba(159,184,196,.18);color:#3F5A64}
.tag--deep{background:var(--purple-mid);border-color:var(--purple-mid);color:var(--gold-soft)}

.fold{border-bottom:1px solid var(--line)}
.fold__sum{
  display:flex;align-items:center;gap:14px;padding:17px 0;cursor:pointer;
  list-style:none;font-family:var(--font-head);font-weight:600;font-size:18px;color:var(--purple-deep);
  transition:color .18s var(--ease);
}
.fold__sum::-webkit-details-marker{display:none}
.fold__sum:hover{color:var(--purple-mid)}
.fold__num{font-size:12px;letter-spacing:.1em;color:var(--gold)}
.fold__mark{margin-left:auto;font-family:var(--font-mono);font-size:12px;color:var(--mist-deep);transition:transform .22s var(--ease)}
.fold[open] .fold__mark{transform:rotate(90deg);color:var(--gold)}
.fold__body{padding:0 0 20px;font-size:16px;color:var(--ink-soft)}

.notice{
  border-left:3px solid var(--gold);
  background:rgba(235,217,164,.24);
  padding:16px 20px;font-size:15px;color:#40382F;
}
.notice--mist{border-left-color:var(--mist-deep);background:rgba(159,184,196,.16)}
.notice__label{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--mist-deep);display:block;margin-bottom:6px}

.crumbs{font-size:12.5px;color:var(--mist-deep);margin-bottom:26px}
.crumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-family:var(--font-mono);letter-spacing:.06em}
.crumbs__list li{display:inline-flex;align-items:center;gap:8px}
.crumbs__list li + li::before{content:"/";color:rgba(94,124,136,.55)}
.crumbs a{text-decoration:underline;text-decoration-color:rgba(94,124,136,.45);text-underline-offset:3px;transition:color .18s var(--ease)}
.crumbs a:hover{color:var(--purple-deep);text-decoration-color:var(--gold)}

/* 晨光影像容器（页面阶段放 <img>） */
.media-frame{
  position:relative;overflow:hidden;border:1px solid var(--line);border-radius:2px;
  aspect-ratio:16/10;background:linear-gradient(150deg,#F3E7D2 0%,#E7D8BE 58%,#D6CAB6 100%);
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-frame--dawn{background:linear-gradient(135deg,#FBEED6 0%,#EFD9B4 44%,#C6B49A 100%)}
.media-frame > img{width:100%;height:100%;object-fit:cover}
.media-frame__ph{
  position:absolute;inset:0;display:grid;place-items:center;text-align:center;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.18em;color:rgba(94,124,136,.8);
  padding:16px;
}
.media-frame__tag{
  position:absolute;left:12px;bottom:12px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  background:rgba(252,248,241,.92);color:var(--purple-deep);
  padding:3px 9px;border-radius:2px;border:1px solid var(--line);
}

/* ---------- 显现动效协议 ---------- */
html.has-js [data-reveal]{
  opacity:0;transform:translateY(12px);
  transition:opacity .36s var(--ease),transform .36s var(--ease);
  transition-delay:var(--reveal-delay,0ms);
}
html.has-js [data-reveal].is-revealed{opacity:1;transform:none}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width:1040px){
  .layout-split{grid-template-columns:minmax(0,1fr) 260px}
  .layout-split__aside{padding-left:26px}
  .footer__grid{grid-template-columns:1fr 1fr;gap:40px}
  .footer__col:last-child{grid-column:1 / -1}
}

@media (max-width:960px){
  h1{font-size:34px}
  h2{font-size:27px}
  .section{padding:64px 0}
  .nav-toggle{display:inline-flex}
  .primary-nav{
    position:absolute;left:0;right:0;top:100%;margin:0;display:none;
    background:var(--purple-deep);
    border-top:1px solid rgba(235,217,164,.18);
    border-bottom:1px solid rgba(200,162,39,.4);
    box-shadow:0 22px 34px -22px rgba(24,13,38,.95);
  }
  .primary-nav[data-nav][data-open="true"]{display:block}
  .primary-nav__list{flex-direction:column;align-items:stretch;gap:0;padding:6px 0}
  .primary-nav__item{border-bottom:1px solid rgba(235,217,164,.1)}
  .primary-nav__item:last-child{border-bottom:0}
  .primary-nav__link{padding:15px 22px;font-size:15.5px;justify-content:flex-start}
  .primary-nav__link::after{left:22px;right:auto;bottom:9px;width:24px}
  .statusbar__inner{padding:9px 0}
  .grid--2,.grid--3,.grid--asym{grid-template-columns:minmax(0,1fr)}
  .layout-split{grid-template-columns:minmax(0,1fr)}
  .layout-split__main{padding-right:0}
  .layout-split__aside{padding:26px 0 0;border-left:0;border-top:1px solid var(--line);margin-top:32px}
}

@media (max-width:680px){
  body{font-size:16.5px;line-height:1.8}
  .wrap,.wrap--wide{width:min(var(--wrap),100% - 32px)}
  .cmdbar__inner{min-height:56px;gap:12px}
  .brand__mark{width:28px;height:28px;font-size:16px}
  .brand__name{font-size:15.5px;letter-spacing:.04em}
  .brand__tag{display:none}
  .nav-toggle__label{display:none}
  .statusbar__pulse .mono{display:none}
  .tier__label{display:none}
  .footer__grid{grid-template-columns:1fr;gap:34px}
  .footer__col:last-child{grid-column:auto}
  .footer__inner{padding-top:44px}
  .footer__bottom{flex-direction:column;align-items:flex-start;gap:12px}
  .site-footer{margin-top:64px}
  .card{padding:20px}
  .media-frame{aspect-ratio:4/3}
}

/* ==========================================================================
   可访问性
   ========================================================================== */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  html.has-js [data-reveal]{opacity:1;transform:none}
  .pulse-dot{animation:none}
}