/* =========================================================
   皇家国际品牌 · 共享样式 /assets/site.css
   ========================================================= */

*,*::before,*::after{box-sizing:border-box}
html{-webkit-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}

/* ---------- 变量 ---------- */
:root{
  --royal-900:#1B1030;
  --royal-800:#241542;
  --royal-700:#3B245F;
  --gold:#D4A64A;
  --gold-hi:#F2C94C;
  --crimson:#B33A3A;
  --jade:#2E7D6E;
  --ivory:#F7F2E8;
  --ink:#1A1A24;
  --mist:#CFC6E0;
  --parchment:#EFE3C8;

  --rail-w:240px;
  --gutter:clamp(1.1rem,3.4vw,2.75rem);

  --font-display:"Songti SC","STSong","SimSun","Noto Serif SC",Georgia,"Times New Roman",serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Courier New",monospace;

  --line-gold:1px solid rgba(212,166,74,.34);
  --glass-bg:rgba(59,36,95,.52);
  --glass-shadow:0 28px 70px -46px rgba(0,0,0,.96);
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 基础排版 ---------- */
html{background:var(--royal-900)}
body{
  background:var(--royal-900);
  color:var(--mist);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  font-weight:300;
  line-height:1.12;
  letter-spacing:.005em;
  color:inherit;
}
h1{font-size:clamp(2.6rem,6vw,5.5rem);font-weight:200;letter-spacing:-.012em}
h2{font-size:clamp(1.8rem,3.6vw,3rem)}
h3{font-size:clamp(1.15rem,1.9vw,1.55rem);font-weight:600;line-height:1.35}
h4{font-size:1.02rem;font-weight:700;line-height:1.4}
p{max-width:42em;text-wrap:pretty}
strong{font-weight:700;color:var(--gold-hi)}
small{font-size:.82rem}

.index{
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.2em;
  color:var(--gold);
  text-transform:uppercase;
}
.lede{
  font-size:clamp(1.02rem,1.5vw,1.24rem);
  line-height:1.9;
  color:var(--mist);
  max-width:40em;
}
.section--ivory .lede,.section--parchment .lede{color:#3B3552}

/* ---------- 链接与焦点 ---------- */
a{color:var(--gold);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--gold-hi)}
.section--ivory a,.section--parchment a{color:#8A6420}
.section--ivory a:hover,.section--parchment a:hover{color:#5C420F}
::selection{background:var(--gold);color:var(--royal-900)}
:focus-visible{outline:2px solid var(--gold-hi);outline-offset:3px;border-radius:1px}

.skip-link{
  position:fixed;
  top:-6rem;left:50%;
  transform:translateX(-50%);
  z-index:200;
  padding:.7rem 1.3rem;
  background:var(--gold-hi);
  color:var(--royal-900);
  font-size:.86rem;
  font-weight:700;
  text-decoration:none;
  transition:top .22s var(--ease);
}
.skip-link:focus{top:.7rem;color:var(--royal-900)}

/* ---------- 布局工具 ---------- */
.wrap{width:min(1180px,100%);margin-inline:auto}
.wrap--narrow{width:min(880px,100%);margin-inline:auto}
.section{padding:clamp(3rem,7vw,6.5rem) var(--gutter)}
.section--dark{background:var(--royal-900);color:var(--mist)}
.section--royal{background:var(--royal-700);color:var(--mist)}
.section--ivory{background:var(--ivory);color:var(--ink)}
.section--parchment{background:var(--parchment);color:var(--ink)}
.rule{height:1px;border:0;background:linear-gradient(90deg,var(--gold),rgba(212,166,74,.06));margin:0}

.grid{display:grid;gap:clamp(1.2rem,2.6vw,2.2rem)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--7-4{grid-template-columns:minmax(0,7fr) minmax(0,4fr)}

/* ---------- 基础组件 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.55em;
  padding:.78em 1.5em;
  font-family:var(--font-body);
  font-size:.95rem;font-weight:600;letter-spacing:.1em;
  color:var(--gold-hi);
  background:transparent;
  border:1px solid var(--gold);
  border-radius:1px;
  text-decoration:none;
  cursor:pointer;
  transition:background .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease),transform .24s var(--ease);
}
.btn:hover{background:rgba(212,166,74,.14);color:var(--gold-hi);border-color:var(--gold-hi);transform:translateY(-1px)}
.btn--solid{background:linear-gradient(100deg,var(--gold-hi),var(--gold));color:var(--royal-900);border-color:transparent;font-weight:700}
.btn--solid:hover{background:linear-gradient(100deg,#FFD968,var(--gold-hi));color:var(--royal-900)}
.btn--ghost{color:var(--mist);border-color:rgba(207,198,224,.34)}
.btn--ghost:hover{color:var(--gold-hi);border-color:var(--gold)}

.tag{
  display:inline-flex;align-items:center;gap:.45em;
  padding:.28em .72em;
  font-family:var(--font-mono);
  font-size:.7rem;letter-spacing:.14em;
  color:var(--gold);
  background:rgba(212,166,74,.1);
  border:1px solid rgba(212,166,74,.42);
  border-radius:1px;
}
.tag--crimson{color:#F0C9C9;background:rgba(179,58,58,.16);border-color:rgba(179,58,58,.6)}
.tag--jade{color:#B6E0D5;background:rgba(46,125,110,.18);border-color:rgba(46,125,110,.62)}

.seal{
  display:inline-grid;place-items:center;
  width:2.4rem;height:2.4rem;
  background:linear-gradient(145deg,var(--crimson),#8C2A2A);
  color:var(--parchment);
  font-family:var(--font-display);
  font-weight:700;font-size:1.1rem;line-height:1;
  box-shadow:inset 0 0 0 1px rgba(247,242,232,.4),0 8px 20px -12px rgba(179,58,58,.9);
}

.glass{
  background:var(--glass-bg);
  backdrop-filter:blur(14px) saturate(150%);
  -webkit-backdrop-filter:blur(14px) saturate(150%);
  border:var(--line-gold);
  box-shadow:var(--glass-shadow);
  padding:clamp(1.25rem,2.6vw,2rem);
}
.panel{
  background:var(--ivory);
  color:var(--ink);
  border-top:2px solid var(--gold);
  padding:clamp(1.35rem,3vw,2.4rem);
}

/* 图片容器基础规则（页面阶段放置占位图片） */
.frame{
  position:relative;
  display:block;
  overflow:hidden;
  background:linear-gradient(150deg,var(--royal-700),var(--royal-900));
  border:var(--line-gold);
}
.frame > img,
.frame > picture > img{
  display:block;
  width:100%;height:100%;
  object-fit:cover;
  object-position:center;
}
.frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  box-shadow:inset 0 0 0 1px rgba(212,166,74,.3);
}
.frame::before{
  content:"";position:absolute;right:-10%;bottom:-10%;
  width:58%;height:58%;pointer-events:none;
  background:radial-gradient(circle at 100% 100%,rgba(212,166,74,.22),transparent 70%);
}
.frame--16x9{aspect-ratio:16/9}
.frame--4x3{aspect-ratio:4/3}
.frame--1x1{aspect-ratio:1/1}
.frame--tall{aspect-ratio:3/4}
.frame__caption{
  position:absolute;left:0;bottom:0;z-index:2;
  padding:.5rem .85rem;
  background:var(--parchment);
  color:var(--ink);
  font-family:var(--font-mono);
  font-size:.7rem;letter-spacing:.14em;
}

.prose{max-width:42em;font-size:1.02rem;line-height:1.88}
.prose h2{margin-top:2.2em}
.prose h3{margin-top:1.8em}
.prose ul,.prose ol{padding-left:1.35em}
.prose ul{list-style:square}
.prose ol{list-style:decimal}
.prose li{margin-bottom:.5em}
.prose blockquote{
  margin:1.9em 0;padding:.2em 0 .2em 1.2em;
  border-left:2px solid var(--gold);
  font-family:var(--font-display);
  font-size:1.16rem;line-height:1.7;
}

.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:.55rem;
  font-family:var(--font-mono);
  font-size:.7rem;letter-spacing:.16em;
  color:rgba(207,198,224,.78);
}
.breadcrumb a{color:var(--gold);text-decoration:none}
.breadcrumb a:hover{color:var(--gold-hi);text-decoration:underline}
.breadcrumb__sep{color:rgba(207,198,224,.42)}

/* ---------- 站点外壳：移动端顶栏 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:100;
  background:var(--royal-900);
  color:var(--mist);
  box-shadow:0 1px 0 rgba(212,166,74,.28),0 22px 44px -34px rgba(0,0,0,.95);
}

.entry-bar{
  display:flex;align-items:center;justify-content:space-between;gap:.75rem;
  padding:.45rem clamp(.9rem,3vw,1.2rem);
  background:linear-gradient(100deg,var(--gold-hi) 0%,var(--gold) 52%,#AF842F 100%);
  color:var(--royal-900);
}
.entry-bar__tag{
  font-family:var(--font-mono);
  font-size:.64rem;letter-spacing:.22em;
  color:rgba(27,16,48,.74);
  padding-right:.6rem;
  border-right:1px solid rgba(27,16,48,.3);
  white-space:nowrap;
}
.entry-bar__link{
  display:inline-flex;align-items:center;gap:.4rem;
  font-size:.83rem;font-weight:700;letter-spacing:.06em;
  color:var(--royal-900);
  text-decoration:none;
  white-space:nowrap;
}
.entry-bar__link:hover{color:#5B1436}
.entry-bar__arrow{transition:transform .24s var(--ease)}
.entry-bar__link:hover .entry-bar__arrow{transform:translateX(3px)}

.bar{
  display:flex;align-items:center;justify-content:space-between;gap:1rem;
  padding:.7rem var(--gutter);
}
.brand{display:inline-flex;align-items:center;gap:.7rem;text-decoration:none;color:var(--ivory)}
.brand:hover{color:var(--gold-hi)}
.brand__seal{
  display:inline-grid;place-items:center;flex:none;
  width:2.4rem;height:2.4rem;
  background:linear-gradient(145deg,var(--crimson),#8C2A2A);
  color:var(--parchment);
  font-family:var(--font-display);
  font-weight:700;font-size:1.1rem;line-height:1;
  box-shadow:inset 0 0 0 1px rgba(247,242,232,.4),0 8px 20px -12px rgba(179,58,58,.95);
}
.brand__word{display:flex;flex-direction:column;line-height:1.15}
.brand__name{font-family:var(--font-display);font-weight:700;font-size:1.18rem;letter-spacing:.16em}
.brand__latin{font-family:var(--font-mono);font-size:.58rem;letter-spacing:.3em;color:var(--gold)}

.nav-toggle{
  display:inline-flex;align-items:center;gap:.55rem;
  padding:.55rem .8rem;
  background:transparent;
  border:1px solid rgba(212,166,74,.45);
  color:var(--gold);
  font-family:var(--font-mono);
  font-size:.68rem;letter-spacing:.18em;
  cursor:pointer;
  transition:border-color .22s var(--ease),color .22s var(--ease),background .22s var(--ease);
}
.nav-toggle:hover{border-color:var(--gold-hi);color:var(--gold-hi);background:rgba(212,166,74,.1)}
.nav-toggle__icon{position:relative;display:inline-block;width:16px;height:10px;flex:none}
.nav-toggle__icon::before,
.nav-toggle__icon::after{
  content:"";position:absolute;left:0;right:0;height:1.5px;background:currentColor;
  transition:transform .3s var(--ease);
}
.nav-toggle__icon::before{top:0}
.nav-toggle__icon::after{bottom:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__icon::before{transform:translateY(4.25px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__icon::after{transform:translateY(-4.25px) rotate(-45deg)}

/* 移动端抽屉 */
.site-nav{
  max-height:0;
  overflow:hidden;
  opacity:0;
  padding:0 var(--gutter);
  border-top:1px solid transparent;
  transition:max-height .42s var(--ease),opacity .3s var(--ease),border-color .3s var(--ease);
}
.site-nav[data-open]{
  max-height:34rem;
  opacity:1;
  border-top-color:rgba(212,166,74,.22);
}
.site-nav__list{padding:.55rem 0 .2rem}
.site-nav__link{
  display:flex;align-items:baseline;gap:.85rem;
  padding:.8rem 1rem;
  color:var(--mist);
  font-size:1rem;line-height:1.4;
  text-decoration:none;
  border-left:2px solid transparent;
  transition:color .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease);
}
.site-nav__link:hover{color:var(--gold-hi);background:rgba(212,166,74,.09)}
.site-nav__link[aria-current="page"]{
  color:var(--gold-hi);
  border-left-color:var(--gold-hi);
  background:linear-gradient(90deg,rgba(242,201,76,.16),transparent 72%);
}
.site-nav__idx{
  min-width:1.7em;
  font-family:var(--font-mono);
  font-size:.66rem;letter-spacing:.14em;
  color:rgba(212,166,74,.66);
  transition:color .22s var(--ease);
}
.site-nav__link[aria-current="page"] .site-nav__idx{color:var(--gold-hi)}
.site-nav__label{flex:1}
.site-nav__quick{
  display:flex;align-items:center;gap:.55rem;
  margin:.4rem 0 1.1rem;
  padding:.75rem 1rem;
  font-size:.88rem;
  color:var(--parchment);
  background:rgba(46,125,110,.2);
  border:1px solid rgba(46,125,110,.55);
  text-decoration:none;
  transition:background .22s var(--ease),color .22s var(--ease);
}
.site-nav__quick:hover{background:rgba(46,125,110,.34);color:#DDF3EC}
.site-nav__quick-mark{color:#7FCDBB;font-size:.62rem}

/* 内容避开固定顶栏 */
#main-content{display:block;padding-top:6.5rem}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  background:linear-gradient(180deg,#160D28 0%,var(--royal-900) 60%);
  color:var(--mist);
  border-top:1px solid rgba(212,166,74,.34);
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,transparent,var(--gold) 22%,var(--crimson) 50%,var(--gold) 78%,transparent);
  opacity:.9;
}
.site-footer__inner{
  width:min(1180px,100%);
  margin-inline:auto;
  padding:clamp(2.6rem,6vw,4.5rem) var(--gutter) clamp(1.5rem,3vw,2.2rem);
  display:grid;
  gap:clamp(1.8rem,4vw,3rem);
  grid-template-columns:1fr;
}
.footer-brand__seal{
  display:inline-grid;place-items:center;
  width:2.9rem;height:2.9rem;
  margin-bottom:1rem;
  background:linear-gradient(145deg,var(--crimson),#7E2525);
  color:var(--parchment);
  font-family:var(--font-display);
  font-weight:700;font-size:1.3rem;line-height:1;
  box-shadow:inset 0 0 0 1px rgba(247,242,232,.38);
}
.footer-brand__name{
  font-family:var(--font-display);
  font-size:1.28rem;font-weight:700;letter-spacing:.14em;
  color:var(--ivory);
  max-width:100%;
}
.footer-brand__line{
  margin-top:.5rem;
  font-family:var(--font-mono);
  font-size:.7rem;letter-spacing:.16em;
  color:var(--gold);
  max-width:100%;
}
.footer-nav__title,
.footer-contact__title{
  font-family:var(--font-mono);
  font-size:.68rem;letter-spacing:.24em;
  color:var(--gold);
  margin-bottom:.9rem;
  padding-bottom:.55rem;
  border-bottom:1px solid rgba(212,166,74,.24);
}
.footer-nav__list{
  display:grid;
  gap:.5rem 1.4rem;
  grid-template-columns:repeat(2,minmax(0,1fr));
}
.footer-nav__list a{
  position:relative;
  display:inline-block;
  padding:.12rem 0;
  color:var(--mist);
  font-size:.93rem;
  text-decoration:none;
  transition:color .22s var(--ease),padding-left .22s var(--ease);
}
.footer-nav__list a::before{
  content:"";position:absolute;left:0;top:50%;
  width:0;height:1px;background:var(--gold-hi);
  transform:translateY(-50%);
  transition:width .25s var(--ease);
}
.footer-nav__list a:hover{color:var(--gold-hi);padding-left:1.05rem}
.footer-nav__list a:hover::before{width:.72rem}
.footer-contact__row{
  display:flex;gap:.8rem;align-items:baseline;
  margin-bottom:.6rem;
  font-size:.88rem;line-height:1.65;
  max-width:100%;
}
.footer-contact__key{
  flex:none;min-width:2.8em;
  font-family:var(--font-mono);
  font-size:.66rem;letter-spacing:.18em;
  color:var(--gold);
}
.footer-contact__val{color:var(--mist);word-break:break-word}
.site-footer__base{
  width:min(1180px,100%);
  margin-inline:auto;
  padding:1rem var(--gutter) 1.6rem;
  border-top:1px solid rgba(212,166,74,.16);
  display:flex;flex-wrap:wrap;gap:.5rem 1.6rem;
  align-items:center;justify-content:space-between;
  font-family:var(--font-mono);
  font-size:.7rem;letter-spacing:.12em;
  color:rgba(207,198,224,.75);
}
.site-footer__copy,.site-footer__icp{max-width:100%}

/* ---------- 返回顶部（脚本生成） ---------- */
.to-top{
  position:fixed;right:1rem;bottom:1rem;z-index:120;
  display:inline-flex;align-items:center;gap:.45rem;
  padding:.6rem .9rem;
  font-family:var(--font-mono);
  font-size:.68rem;letter-spacing:.16em;
  color:var(--gold-hi);
  background:rgba(27,16,48,.88);
  border:1px solid rgba(212,166,74,.5);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s var(--ease),background .22s var(--ease);
}
.to-top:hover{background:rgba(59,36,95,.95);border-color:var(--gold-hi)}
.to-top.is-on{opacity:1;visibility:visible;transform:none}
.to-top__mark{font-size:.9rem;line-height:1}

/* ---------- 滚动显现 ---------- */
html[data-motion="reveal"] [data-reveal]{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .72s var(--ease) var(--reveal-delay,0ms),transform .72s var(--ease) var(--reveal-delay,0ms);
}
html[data-motion="reveal"] [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 平板 ---------- */
@media (min-width:640px){
  .site-footer__inner{grid-template-columns:1.2fr 1.8fr}
}
@media (min-width:768px){
  .site-footer__inner{grid-template-columns:1.3fr 2fr 1.7fr}
  .site-footer__base{padding-bottom:1.9rem}
}

/* ---------- 桌面端：侧边轨道 ---------- */
@media (min-width:1024px){
  body{padding-left:var(--rail-w)}

  .site-header{
    right:auto;bottom:0;
    width:var(--rail-w);
    display:flex;flex-direction:column;
    background:linear-gradient(180deg,#2A1846 0%,var(--royal-900) 44%,#150C26 100%);
    border-right:1px solid rgba(212,166,74,.24);
    box-shadow:24px 0 64px -48px rgba(0,0,0,.98);
  }
  .site-header::after{
    content:"";position:absolute;top:0;bottom:0;right:-1px;width:1px;
    background:linear-gradient(180deg,transparent,rgba(242,201,76,.72) 14%,rgba(212,166,74,.14) 54%,transparent);
    pointer-events:none;
  }

  .entry-bar{
    flex-direction:column;align-items:flex-start;gap:.4rem;
    padding:1rem 1.15rem 1.05rem;
  }
  .entry-bar__tag{
    width:100%;
    padding:0 0 .45rem;
    border-right:0;
    border-bottom:1px solid rgba(27,16,48,.24);
  }
  .entry-bar__link{font-size:.85rem}

  .bar{
    flex-direction:column;align-items:flex-start;gap:0;
    padding:1.7rem 1.15rem 1.4rem;
    border-bottom:1px solid rgba(212,166,74,.2);
  }
  .nav-toggle{display:none}
  .brand__seal{width:3rem;height:3rem;font-size:1.35rem}
  .brand__name{font-size:1.32rem}
  .brand__latin{font-size:.6rem}

  .site-nav{
    flex:1;
    max-height:none;
    opacity:1;
    overflow-y:auto;overflow-x:hidden;
    padding:.9rem .6rem 1.4rem;
    border-top:0;
  }
  .site-nav[data-open]{max-height:none;border-top:0}
  .site-nav__list{padding:0}
  .site-nav__link{padding:.72rem 1rem;font-size:.98rem}
  .site-nav__quick{display:none}
  .site-nav__link[aria-current="page"]{
    background:linear-gradient(90deg,rgba(242,201,76,.18),transparent 80%);
  }

  #main-content{padding-top:0}

  .grid--7-4{grid-template-columns:minmax(0,7fr) minmax(0,4fr)}
  .to-top{right:1.6rem;bottom:1.6rem}
}

/* ---------- 窄屏折叠 ---------- */
@media (max-width:1023px){
  .grid--7-4,.grid--3,.grid--2{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:480px){
  .footer-nav__list{grid-template-columns:minmax(0,1fr)}
  .entry-bar__tag{letter-spacing:.14em}
}

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion:no-preference){
  html{scroll-behavior:smooth}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html[data-motion="reveal"] [data-reveal]{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  .to-top{transition:none}
}