/* ============================================================
   皇家国际汇 · /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 头部 / 页脚 / 基础组件
   ============================================================ */

/* ---------- 01 设计令牌 ---------- */
:root{
  --ink:#0A0D0B;
  --felt:#12251C;
  --felt-2:#1C3A2B;
  --paper:#F4EEE3;
  --paper-2:#D8CFBE;
  --gold:#C9A45C;
  --gold-bright:#EBD08A;
  --cinnabar:#C4402F;
  --cyan:#77AFA6;
  --line:#2B312C;
  --text-light:#E8E2D6;
  --text-dark:#241F1A;

  --rail-w:88px;
  --shell-max:1520px;
  --r-lg:28px;
  --r-md:22px;
  --r-sm:18px;
  --r-xs:12px;

  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,monospace;

  --fs-12:12px; --fs-13:13px; --fs-16:16px; --fs-18:18px;
  --fs-22:22px; --fs-28:28px; --fs-36:36px; --fs-48:48px; --fs-64:64px;

  --ease:cubic-bezier(.22,.61,.36,1);
  --rail-progress:0;
}

/* ---------- 02 RESET ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  background:var(--ink);
  scroll-behavior:smooth;
}
body,h1,h2,h3,h4,h5,h6,p,figure,blockquote,ul,ol,li,dl,dt,dd{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
:where(a,button,summary,[tabindex]):focus-visible{
  outline:2px solid var(--gold-bright);
  outline-offset:3px;
  border-radius:8px;
}

/* ---------- 03 基础排版与氛围 ---------- */
body{
  position:relative;
  min-height:100vh;
  background:var(--ink);
  color:var(--text-light);
  font-family:var(--font-sans);
  font-size:var(--fs-16);
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background:
    radial-gradient(120% 80% at 10% -12%, rgba(28,58,43,.60), transparent 62%),
    radial-gradient(90% 70% at 100% 0%, rgba(201,164,92,.10), transparent 58%),
    radial-gradient(120% 120% at 50% 118%, rgba(0,0,0,.86), transparent 62%);
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  opacity:.45;
  background-image:
    linear-gradient(rgba(43,49,44,.42) 1px, transparent 1px),
    linear-gradient(90deg, rgba(43,49,44,.32) 1px, transparent 1px);
  background-size:124px 124px;
  -webkit-mask-image:radial-gradient(100% 90% at 50% 0%, rgba(0,0,0,.7), transparent 78%);
  mask-image:radial-gradient(100% 90% at 50% 0%, rgba(0,0,0,.7), transparent 78%);
}

h1,h2,h3,h4{font-family:var(--font-serif);font-weight:600;letter-spacing:.02em;line-height:1.28;color:var(--paper)}
.h1{font-size:clamp(34px,5.2vw,var(--fs-64))}
.h2{font-size:clamp(26px,3.4vw,var(--fs-36))}
.h3{font-size:var(--fs-22)}
.lede{font-size:var(--fs-18);line-height:1.85;color:var(--paper-2);max-width:62ch}
.mono{font-family:var(--font-mono);letter-spacing:.04em;font-feature-settings:"tnum" 1}
.annot{font-size:var(--fs-12);line-height:1.7;color:var(--gold);letter-spacing:.14em}
.annot--vertical{writing-mode:vertical-rl;text-orientation:mixed}
.annot--rotate{display:inline-block;transform:rotate(90deg);transform-origin:left center}
.divider{height:1px;border:0;background:linear-gradient(90deg,rgba(201,164,92,.65),rgba(201,164,92,.06));margin:0}

/* ---------- 04 布局容器 ---------- */
.shell{
  width:100%;
  max-width:var(--shell-max);
  margin-inline:auto;
  padding-inline:20px;
}
#main-content{
  display:block;
  padding-top:clamp(84px,9vw,116px);
}
.grid{display:grid;gap:28px}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.col-2{grid-column:span 2}
.col-3{grid-column:span 3}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-12{grid-column:span 12}

/* ---------- 05 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:12px;
  left:12px;
  z-index:400;
  padding:10px 18px;
  border-radius:999px;
  background:var(--gold);
  color:#141007;
  font-size:var(--fs-13);
  letter-spacing:.08em;
  transform:translateY(-180%);
  transition:transform .22s var(--ease);
}
.skip-link:focus{transform:none}

/* ---------- 06 HEADER 外壳 ---------- */
.site-header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:120;
  pointer-events:none;
}
.site-header > *{pointer-events:auto}

/* 6.1 品牌轨道 */
.brand-rail{
  position:fixed;
  top:0;
  left:0;
  bottom:0;
  width:var(--rail-w);
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:space-between;
  padding:26px 0 22px;
  background:linear-gradient(180deg,#0C1310 0%,#0A0D0B 55%,#101A14 100%);
  border-right:1px solid var(--line);
  box-shadow:24px 0 60px -50px rgba(0,0,0,1);
}
.brand-rail__link{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:12px;
}
.brand-rail__zh{
  writing-mode:vertical-rl;
  font-family:var(--font-serif);
  font-size:var(--fs-22);
  font-weight:600;
  letter-spacing:.24em;
  color:var(--paper);
  transition:color .24s var(--ease);
}
.brand-rail__link:hover .brand-rail__zh{color:var(--gold-bright)}
.brand-rail__en{
  writing-mode:vertical-rl;
  font-size:var(--fs-12);
  letter-spacing:.18em;
  color:var(--gold);
  opacity:.8;
}
.brand-rail__chip{
  width:42px;
  height:42px;
  border-radius:50%;
  background:conic-gradient(from 0deg,
    var(--gold) 0 12%, #6B5528 12% 25%,
    var(--gold) 25% 37%, #6B5528 37% 50%,
    var(--gold) 50% 62%, #6B5528 62% 75%,
    var(--gold) 75% 87%, #6B5528 87% 100%);
  box-shadow:inset 0 0 0 8px #0A0D0B, 0 0 0 1px rgba(201,164,92,.26);
  opacity:.8;
}
.brand-rail__meter{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:12px;
}
.brand-rail__scale{
  position:relative;
  width:2px;
  height:104px;
  border-radius:2px;
  background:repeating-linear-gradient(180deg,var(--line) 0 5px,transparent 5px 12px);
}
.brand-rail__fill{
  position:absolute;
  left:0;
  top:0;
  width:100%;
  height:calc(var(--rail-progress) * 100%);
  border-radius:2px;
  background:linear-gradient(180deg,var(--gold-bright),var(--gold));
  transition:height .18s linear;
}
.brand-rail__readout{
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.06em;
  color:var(--gold);
}

/* 6.2 悬浮胶囊导航 */
.capsule{
  position:fixed;
  top:20px;
  right:32px;
  display:flex;
  align-items:center;
  gap:8px;
  padding:8px 10px 8px 16px;
  border:1px solid var(--line);
  border-radius:999px;
  background:linear-gradient(135deg,rgba(28,58,43,.94),rgba(10,13,11,.94));
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  box-shadow:0 20px 46px -28px rgba(0,0,0,.96), inset 0 1px 0 rgba(201,164,92,.16);
  transition:padding .3s var(--ease), top .3s var(--ease), background .3s var(--ease);
}
.capsule__home{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding-right:6px;
  border-right:1px solid var(--line);
}
.capsule__glyph{
  width:22px;
  height:22px;
  border-radius:50%;
  background:conic-gradient(from 210deg,var(--gold-bright),var(--gold) 42%,#6B5528 72%,var(--gold-bright));
  box-shadow:inset 0 0 0 3px #0F1A15;
}
.capsule__name{
  font-family:var(--font-serif);
  font-size:var(--fs-16);
  font-weight:600;
  letter-spacing:.14em;
  color:var(--paper);
  white-space:nowrap;
}
.capsule__toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:8px 14px;
  border-radius:999px;
  border:1px solid var(--line);
  color:var(--paper);
  font-size:var(--fs-13);
  letter-spacing:.12em;
}
.capsule__bars{display:inline-flex;flex-direction:column;gap:4px;width:16px}
.capsule__bars i{display:block;height:1.5px;border-radius:2px;background:currentColor;transition:transform .24s var(--ease),opacity .24s var(--ease)}
.capsule[data-open] .capsule__bars i:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.capsule[data-open] .capsule__bars i:nth-child(2){opacity:0}
.capsule[data-open] .capsule__bars i:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}

.capsule__panel{
  display:flex;
  align-items:center;
  gap:10px;
}
.nav-menu{display:flex;align-items:center;gap:2px}
.nav-menu__link{
  display:block;
  padding:9px 13px;
  border-radius:999px;
  font-size:var(--fs-13);
  letter-spacing:.06em;
  color:var(--text-light);
  white-space:nowrap;
  transition:color .22s var(--ease),background .22s var(--ease);
}
.nav-menu__link:hover{color:var(--gold-bright);background:rgba(201,164,92,.12)}
.nav-menu__link[aria-current="page"]{
  color:#141007;
  background:linear-gradient(135deg,var(--gold-bright),var(--gold));
  box-shadow:0 8px 20px -14px rgba(201,164,92,.95);
}
.capsule__aside{
  display:flex;
  align-items:center;
  gap:12px;
  padding-left:12px;
  border-left:1px solid var(--line);
}
.capsule__meta{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.04em;
  color:var(--cyan);
  white-space:nowrap;
}
.dot{
  width:7px;height:7px;border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 0 3px rgba(119,175,166,.18);
}
.capsule.is-compact{top:12px;padding:6px 8px 6px 14px}
.capsule.is-compact .capsule__name,
.capsule.is-compact .capsule__meta{display:none}
.capsule.is-compact .capsule__home{padding-right:8px}

/* ---------- 07 通用组件 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:12px 22px;
  border:1px solid transparent;
  border-radius:999px;
  font-size:var(--fs-16);
  letter-spacing:.06em;
  line-height:1.2;
  cursor:pointer;
  transition:transform .18s var(--ease),background .24s var(--ease),color .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.btn--sm{padding:8px 16px;font-size:var(--fs-13)}
.btn--gold{
  background:linear-gradient(135deg,var(--gold-bright),var(--gold));
  color:#171208;
  box-shadow:0 12px 26px -16px rgba(201,164,92,.95);
}
.btn--gold:hover{transform:translateY(-2px);box-shadow:0 16px 32px -14px rgba(201,164,92,.9)}
.btn--ghost{border-color:var(--line);color:var(--paper);background:rgba(28,58,43,.35)}
.btn--ghost:hover{border-color:var(--gold);color:var(--gold-bright);transform:translateY(-2px)}
.btn:active{transform:translateY(1px) scale(.985)}

.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:6px 13px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(28,58,43,.55);
  color:var(--paper-2);
  font-size:var(--fs-13);
  letter-spacing:.04em;
}
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 10px;
  border-radius:6px;
  font-size:var(--fs-12);
  letter-spacing:.1em;
  background:rgba(28,58,43,.7);
  color:var(--paper-2);
}
.tag--gold{background:rgba(201,164,92,.16);color:var(--gold-bright)}
.tag--red{background:rgba(196,64,47,.16);color:#F0B9AF}

.card{
  position:relative;
  padding:28px;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  background:linear-gradient(160deg,rgba(28,58,43,.72),rgba(12,19,16,.9));
}
.card--paper{
  background:var(--paper);
  border-color:rgba(216,207,190,.9);
  color:var(--text-dark);
}
.card--paper :where(h1,h2,h3,h4){color:#1B1712}
.card--flat{background:transparent}
.card__eyebrow{font-size:var(--fs-12);letter-spacing:.18em;color:var(--gold);margin-bottom:10px}

.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:28px}
.sec-head__title{font-size:clamp(26px,3.4vw,var(--fs-36))}
.sec-head__note{font-size:var(--fs-13);color:var(--paper-2);max-width:44ch}
.eyebrow{
  display:inline-block;
  font-size:var(--fs-12);
  letter-spacing:.26em;
  color:var(--gold);
  text-transform:uppercase;
}

.stat{display:flex;flex-direction:column;gap:6px}
.stat__value{font-family:var(--font-mono);font-size:clamp(20px,2.6vw,var(--fs-28));letter-spacing:.04em;color:var(--gold-bright)}
.stat__label{font-size:var(--fs-13);color:var(--paper-2)}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-size:var(--fs-13);
  color:var(--paper-2);
  padding:0 0 18px;
}
.breadcrumb li{display:inline-flex;align-items:center;gap:10px}
.breadcrumb li + li::before{content:"";width:16px;height:1px;background:var(--gold);opacity:.6}
.breadcrumb a:hover{color:var(--gold-bright)}

/* 图片/视觉容器基础规则（供页面阶段放置素材） */
.media-frame{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  background:
    radial-gradient(90% 120% at 12% 0%, rgba(28,58,43,.95), transparent 62%),
    linear-gradient(150deg,#12251C,#0A0D0B);
  aspect-ratio:16 / 10;
}
.media-frame--tall{aspect-ratio:4 / 5}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame img,
.media-frame svg{width:100%;height:100%;object-fit:cover}
.media-frame__caption{
  position:absolute;
  left:18px;
  bottom:16px;
  font-size:var(--fs-12);
  letter-spacing:.12em;
  color:var(--gold);
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:radial-gradient(120% 100% at 50% 120%, rgba(0,0,0,.72), transparent 62%);
}

/* ---------- 08 FOOTER ---------- */
.site-footer{
  position:relative;
  margin-top:96px;
  padding-bottom:28px;
  background:linear-gradient(180deg,#0C1310 0%,#080A09 100%);
  border-top:1px solid rgba(201,164,92,.38);
  color:var(--text-light);
}
.site-footer__top{
  display:grid;
  grid-template-columns:minmax(240px,320px) 1fr;
  gap:56px;
  padding:60px 0 44px;
}
.site-footer__brand{display:flex;flex-direction:column;align-items:flex-start;gap:12px}
.site-footer__chip{
  width:34px;height:34px;border-radius:50%;
  background:conic-gradient(from 40deg,var(--gold-bright),var(--gold) 45%,#6B5528 75%,var(--gold-bright));
  box-shadow:inset 0 0 0 7px #0A0D0B, 0 0 0 1px rgba(201,164,92,.25);
}
.site-footer__name{
  font-family:var(--font-serif);
  font-size:var(--fs-28);
  font-weight:600;
  letter-spacing:.14em;
  color:var(--paper);
}
.site-footer__tag{font-size:var(--fs-13);color:var(--paper-2);letter-spacing:.08em}
.site-footer__cols{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:32px}
.foot-col{display:flex;flex-direction:column;gap:14px}
.foot-col__title{
  font-size:var(--fs-13);
  letter-spacing:.2em;
  color:var(--gold);
  padding-bottom:10px;
  border-bottom:1px solid var(--line);
}
.foot-col__list{display:flex;flex-direction:column;gap:10px;font-size:var(--fs-13)}
.foot-col__list a{
  color:var(--paper-2);
  transition:color .2s var(--ease),padding-left .2s var(--ease);
}
.foot-col__list a:hover{color:var(--gold-bright);padding-left:4px}
.foot-col__list--chips{flex-direction:row;flex-wrap:wrap;gap:8px}

.site-footer__contact{
  padding:26px 28px;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  background:linear-gradient(150deg,rgba(28,58,43,.6),rgba(10,13,11,.72));
}
.site-footer__contact-title{
  font-size:var(--fs-13);
  letter-spacing:.2em;
  color:var(--gold);
  margin-bottom:18px;
}
.contact-list{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:14px 40px;
}
.contact-list__item{display:flex;flex-wrap:wrap;gap:10px;align-items:baseline;font-size:var(--fs-13)}
.contact-list__k{
  flex:0 0 68px;
  color:var(--cyan);
  letter-spacing:.08em;
}
.contact-list__v{color:var(--paper-2);max-width:52ch}
.contact-list__v--mono{font-family:var(--font-mono);letter-spacing:.04em;color:var(--paper)}
.site-footer__note{
  margin-top:18px;
  padding-top:16px;
  border-top:1px solid var(--line);
  font-size:var(--fs-13);
  color:var(--paper-2);
}
.site-footer__bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-top:32px;
  padding-top:20px;
  border-top:1px solid var(--line);
  font-size:var(--fs-12);
  color:var(--paper-2);
  letter-spacing:.06em;
}
.site-footer__legal{color:var(--paper-2)}
.site-footer__meta{font-family:var(--font-mono);color:var(--gold);opacity:.85}

/* ---------- 09 动效 ---------- */
html.js-reveal [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .42s var(--ease),transform .42s var(--ease);
  will-change:opacity,transform;
}
html.js-reveal [data-reveal].is-in{opacity:1;transform:none}

/* ---------- 10 响应式 ---------- */
@media (min-width:960px){
  .shell{padding-left:calc(var(--rail-w) + 32px);padding-right:32px}
}
@media (max-width:1199px){
  .nav-menu__link{padding:8px 10px;font-size:var(--fs-12)}
  .capsule__meta{display:none}
}
@media (max-width:959px){
  body{padding-bottom:64px}
  .brand-rail{
    top:auto;
    left:0;
    right:0;
    bottom:0;
    width:auto;
    height:56px;
    flex-direction:row;
    align-items:center;
    justify-content:space-between;
    padding:0 16px;
    border-right:0;
    border-top:1px solid var(--line);
    background:linear-gradient(0deg,rgba(8,10,9,.98),rgba(12,19,16,.9));
    -webkit-backdrop-filter:blur(10px);
    backdrop-filter:blur(10px);
  }
  .brand-rail__link{flex-direction:row;align-items:center;gap:10px}
  .brand-rail__zh{writing-mode:horizontal-tb;font-size:var(--fs-16);letter-spacing:.14em}
  .brand-rail__en{display:none}
  .brand-rail__chip{display:none}
  .brand-rail__meter{flex-direction:row;align-items:center;gap:10px}
  .brand-rail__scale{
    width:84px;
    height:2px;
    background:repeating-linear-gradient(90deg,var(--line) 0 5px,transparent 5px 12px);
  }
  .brand-rail__fill{
    width:calc(var(--rail-progress) * 100%);
    height:100%;
    background:linear-gradient(90deg,var(--gold),var(--gold-bright));
    transition:width .18s linear;
  }

  .capsule{
    top:12px;
    left:12px;
    right:12px;
    justify-content:space-between;
    padding:8px 10px 8px 14px;
    border-radius:var(--r-md);
  }
  .capsule__toggle{display:inline-flex}
  .capsule__home{border-right:0}
  .capsule__panel{
    position:absolute;
    top:calc(100% + 12px);
    left:0;
    right:0;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:16px;
    border:1px solid var(--line);
    border-radius:var(--r-md);
    background:linear-gradient(160deg,rgba(28,58,43,.98),rgba(10,13,11,.98));
    box-shadow:0 30px 60px -30px rgba(0,0,0,1);
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s var(--ease);
  }
  .capsule[data-open] .capsule__panel{opacity:1;visibility:visible;transform:none}
  .nav-menu{flex-direction:column;align-items:stretch;gap:0}
  .nav-menu__link{
    padding:13px 14px;
    border-radius:var(--r-xs);
    border-bottom:1px solid var(--line);
    font-size:var(--fs-16);
  }
  .nav-menu li:last-child .nav-menu__link{border-bottom:0}
  .nav-menu__link[aria-current="page"]{border-bottom-color:transparent}
  .capsule__aside{
    flex-direction:column;
    align-items:stretch;
    gap:12px;
    margin-top:14px;
    padding:14px 0 0;
    border-left:0;
    border-top:1px solid var(--line);
  }
  .capsule__meta{display:inline-flex}
  .capsule__aside .btn{justify-content:center}

  .site-footer{margin-top:72px}
  .site-footer__top{grid-template-columns:1fr;gap:36px;padding:44px 0 32px}
  .site-footer__cols{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
  .contact-list{grid-template-columns:1fr}
}
@media (max-width:640px){
  .grid--2,.grid--3{grid-template-columns:minmax(0,1fr)}
  .grid--12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .col-2,.col-3,.col-4,.col-5{grid-column:span 6}
  .col-7,.col-8{grid-column:span 6}
  .card{padding:22px;border-radius:var(--r-sm)}
  .site-footer__cols{grid-template-columns:1fr}
  .site-footer__name{font-size:var(--fs-22)}
  .contact-list__k{flex-basis:auto}
}

/* ---------- 11 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;
  }
  html.js-reveal [data-reveal]{opacity:1;transform:none}
  .brand-rail__fill{transition:none}
}