/* ==========================================================================
   皇家国际娱乐 CN · 共享样式表  /assets/site.css
   深紫基底 + 鎏金强调 + 衬线大标题 + 左侧目录轴
   ========================================================================== */

:root{
  --c-purple:#1A0F2E;
  --c-panel:#241640;
  --c-void:#0B0812;
  --c-gold:#C9A24B;
  --c-gold-lite:#E8C87A;
  --c-white:#F4EFE6;
  --c-grey:#B8AEA0;
  --c-line:#3A2A5A;
  --c-ok:#4F9D7A;
  --c-warn:#D27A4A;

  --font-display:"Noto Serif SC","Songti SC","Source Han Serif SC",Georgia,serif;
  --font-body:Inter,"Noto Sans SC","PingFang SC","Hiragino Sans GB",system-ui,sans-serif;

  --w-wide:1240px;
  --w-text:760px;
  --rad:3px;
  --shadow-soft:0 20px 46px -28px rgba(0,0,0,.92);
  --dur:.26s;
  --header-h:58px;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,dl,dd,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--c-gold-lite);outline-offset:3px;border-radius:2px}
::selection{background:rgba(201,162,75,.34);color:var(--c-white)}

/* ---------- 中文排版与全局文字建筑 ---------- */
body{
  min-height:100vh;
  background-color:var(--c-purple);
  background-image:
    radial-gradient(90% 52% at 84% -6%, rgba(201,162,75,.10), transparent 62%),
    radial-gradient(70% 48% at 2% 6%, rgba(58,42,90,.50), transparent 60%),
    linear-gradient(180deg,#150C26 0%,#1A0F2E 44%,#0B0812 100%);
  background-attachment:fixed;
  color:var(--c-white);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5{font-family:var(--font-display);font-weight:700;line-height:1.24;letter-spacing:-.01em;color:var(--c-white)}
h1{font-size:clamp(34px,6vw,68px)}
h2{font-size:clamp(26px,3.6vw,38px)}
h3{font-size:clamp(19px,2.1vw,24px)}
h4{font-size:17px}
p{max-width:74ch}
p+p{margin-top:1em}
strong,b{color:var(--c-gold-lite);font-weight:600}
small{font-size:13px;letter-spacing:.02em}
code,kbd{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.92em;color:var(--c-gold-lite)}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:absolute;left:16px;top:-70px;z-index:220;
  padding:10px 18px;background:var(--c-gold);color:#160D28;
  font-size:14px;letter-spacing:.08em;border-radius:2px;
  transition:top var(--dur) ease;
}
.skip-link:focus{top:12px}

/* ---------- 页头：双层信息导航 ---------- */
.site-header{position:sticky;top:0;z-index:90;isolation:isolate}

.scroll-progress{
  position:fixed;left:0;top:0;height:2px;width:0;z-index:150;
  background:linear-gradient(90deg,var(--c-gold),var(--c-gold-lite));
  box-shadow:0 0 12px rgba(201,162,75,.5);
  pointer-events:none;
}

.header-upper{
  background:rgba(11,8,18,.95);
  border-bottom:1px solid rgba(58,42,90,.65);
  backdrop-filter:blur(7px);
}
.header-upper__inner{
  display:flex;align-items:center;gap:clamp(14px,3vw,40px);
  width:100%;max-width:var(--w-wide);margin-inline:auto;
  padding:14px clamp(18px,4vw,40px) 12px;
}

.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto;min-width:0}
.brand__seal{
  display:grid;place-items:center;width:38px;height:38px;flex:0 0 auto;
  border:1px solid var(--c-gold);border-radius:2px;
  color:var(--c-gold-lite);font-family:var(--font-display);
  font-size:19px;line-height:1;letter-spacing:0;
  background:linear-gradient(160deg,rgba(201,162,75,.14),transparent 70%);
}
.brand__text{display:flex;flex-direction:column;line-height:1.3;min-width:0}
.brand__name{font-family:var(--font-display);font-size:17px;letter-spacing:.06em;color:var(--c-white)}
.brand__sub{font-size:10.5px;letter-spacing:.24em;color:var(--c-gold);text-transform:uppercase}
.brand--footer .brand__name{font-size:19px}

.header-motto{
  flex:1 1 auto;min-width:0;margin:0;
  padding-left:clamp(14px,2vw,26px);
  border-left:1px solid var(--c-line);
  font-size:13px;letter-spacing:.09em;color:var(--c-grey);
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.header-meta{
  display:flex;align-items:center;gap:10px;flex:0 0 auto;margin:0;
  font-size:12px;letter-spacing:.06em;color:var(--c-grey);white-space:nowrap;
}
.header-meta__dot{width:4px;height:4px;border-radius:50%;background:var(--c-gold);opacity:.75}

.header-lower{
  position:relative;
  background:rgba(26,15,46,.94);
  border-bottom:1px solid var(--c-line);
  backdrop-filter:blur(7px);
}
.header-lower__inner{
  position:relative;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  width:100%;max-width:var(--w-wide);margin-inline:auto;
  padding:0 clamp(18px,4vw,40px);min-height:var(--header-h);
}
.primary-nav{flex:1 1 auto;min-width:0}
.nav-list{display:flex;align-items:center;gap:clamp(14px,2.2vw,30px)}
.nav-item{flex:0 0 auto}
.nav-link{
  position:relative;display:inline-block;padding:18px 2px;
  font-size:14.5px;letter-spacing:.06em;color:var(--c-grey);
  transition:color var(--dur) ease;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:12px;height:1px;
  background:var(--c-gold);transform:scaleX(0);transform-origin:left;
  transition:transform var(--dur) ease;
}
.nav-link:hover,.nav-link:focus-visible{color:var(--c-gold-lite)}
.nav-link:hover::after,.nav-link:focus-visible::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--c-gold-lite)}
.nav-link[aria-current="page"]::after{
  transform:scaleX(1);background:var(--c-gold-lite);
  box-shadow:0 0 10px rgba(232,200,122,.55);
}

.header-cta{flex:0 0 auto;padding:9px 16px;font-size:13px;letter-spacing:.1em}

.nav-toggle{
  display:none;align-items:center;gap:9px;flex:0 0 auto;
  padding:9px 13px;border:1px solid var(--c-line);border-radius:2px;
  color:var(--c-white);font-size:12.5px;letter-spacing:.14em;
  transition:border-color var(--dur) ease,color var(--dur) ease;
}
.nav-toggle:hover{border-color:var(--c-gold);color:var(--c-gold-lite)}
.nav-toggle__bars{display:flex;flex-direction:column;gap:3px;width:16px}
.nav-toggle__bars span{display:block;height:1px;background:currentColor;transition:transform var(--dur) ease,opacity .18s ease}
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(4px) rotate(45deg)}
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-4px) rotate(-45deg)}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;margin-top:clamp(48px,7vw,96px);
  background:linear-gradient(180deg,#0B0812 0%,#0B0812 100%);
  border-top:1px solid var(--c-line);
  overflow:hidden;
}
.footer-glow{
  position:absolute;left:-10%;right:40%;top:-46%;height:340px;
  background:radial-gradient(closest-side,rgba(201,162,75,.18),transparent 72%);
  pointer-events:none;
}
.footer-inner{
  position:relative;
  display:grid;grid-template-columns:minmax(0,1.4fr) repeat(2,minmax(0,.8fr));
  gap:clamp(26px,4vw,56px);
  width:100%;max-width:var(--w-wide);margin-inline:auto;
  padding:clamp(42px,6vw,76px) clamp(18px,4vw,40px) clamp(28px,3vw,42px);
}
.footer-lede{margin-top:18px;font-size:14px;color:var(--c-grey);max-width:38ch;line-height:1.8}
.footer-contact{margin-top:22px;font-size:13px;color:var(--c-grey);line-height:1.4}
.footer-contact__row{display:flex;gap:12px;padding:5px 0;border-bottom:1px dashed rgba(58,42,90,.55)}
.footer-contact__row:last-child{border-bottom:0}
.footer-contact__key{flex:0 0 68px;color:rgba(184,174,160,.72);letter-spacing:.06em}
.footer-contact__val{color:var(--c-white);word-break:break-all}
.footer-nav__title{
  font-family:var(--font-display);font-size:13.5px;font-weight:600;
  letter-spacing:.18em;color:var(--c-gold);margin-bottom:16px;
}
.footer-nav__list li+li{margin-top:11px}
.footer-nav__link{
  font-size:14px;color:var(--c-grey);
  transition:color var(--dur) ease,padding-left var(--dur) ease;
}
.footer-nav__link:hover,.footer-nav__link:focus-visible{color:var(--c-gold-lite);padding-left:5px}
.footer-bottom{border-top:1px solid rgba(58,42,90,.6);background:rgba(11,8,18,.6)}
.footer-bottom__inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:8px 26px;width:100%;max-width:var(--w-wide);margin-inline:auto;
  padding:18px clamp(18px,4vw,40px) 22px;
  font-size:12px;letter-spacing:.05em;color:rgba(184,174,160,.86);
}
.footer-legal{display:flex;flex-wrap:wrap;gap:6px 20px;max-width:none;margin:0}
.footer-note{max-width:46ch;margin:0;color:rgba(184,174,160,.7)}

.to-top{
  position:fixed;right:clamp(14px,3vw,34px);bottom:clamp(14px,3vw,34px);z-index:120;
  display:inline-flex;align-items:center;justify-content:center;
  width:46px;height:46px;border-radius:50%;
  border:1px solid var(--c-line);
  background:rgba(26,15,46,.88);
  color:var(--c-gold-lite);font-size:16px;
  box-shadow:var(--shadow-soft);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity var(--dur) ease,transform var(--dur) ease,border-color var(--dur) ease,visibility var(--dur) ease;
}
.to-top[data-visible="true"]{opacity:1;visibility:visible;transform:none}
.to-top:hover{border-color:var(--c-gold);color:#fff}

/* ---------- 通用容器 / 区块 ---------- */
.container{width:100%;max-width:var(--w-wide);margin-inline:auto;padding-inline:clamp(18px,4vw,40px)}
.container--narrow{max-width:var(--w-text)}
.section{padding-block:clamp(52px,8vw,108px)}
.section--tight{padding-block:clamp(34px,5vw,64px)}
.section--void{background:linear-gradient(180deg,rgba(11,8,18,.9),rgba(11,8,18,.35));border-block:1px solid var(--c-line)}
.section__head{max-width:var(--w-text);margin-bottom:clamp(26px,4vw,48px)}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12px;letter-spacing:.24em;color:var(--c-gold);margin-bottom:14px;
}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--c-gold);opacity:.8}
.section-title{font-size:clamp(26px,3.6vw,38px)}
.section-lede{margin-top:14px;font-size:15px;color:var(--c-grey);max-width:60ch}

/* ---------- 栅格 ---------- */
.grid{display:grid;gap:clamp(18px,2.4vw,32px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--aside{grid-template-columns:minmax(0,280px) minmax(0,1fr);align-items:start}

/* ---------- 面板与卡片 ---------- */
.panel{
  position:relative;
  background:linear-gradient(160deg,var(--c-panel) 0%,#1C1134 100%);
  border:1px solid var(--c-line);border-radius:var(--rad);
  padding:clamp(20px,2.6vw,32px);
  box-shadow:var(--shadow-soft);
}
.panel--flat{box-shadow:none;background:rgba(36,22,64,.55)}
.panel__head{
  display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;
  gap:10px 18px;padding-bottom:14px;margin-bottom:18px;
  border-bottom:1px solid rgba(58,42,90,.7);
}
.panel__title{font-family:var(--font-display);font-size:19px;letter-spacing:.02em}
.panel__body{font-size:15px;color:var(--c-grey)}
.panel__body p{color:var(--c-grey)}

.card{
  position:relative;display:block;
  background:linear-gradient(155deg,rgba(36,22,64,.95),rgba(26,15,46,.9));
  border:1px solid var(--c-line);border-radius:var(--rad);
  padding:clamp(18px,2.2vw,26px);
  transition:transform var(--dur) ease,border-color var(--dur) ease,box-shadow var(--dur) ease;
}
.card:hover,.card:focus-within{
  transform:translateY(-4px);
  border-color:rgba(201,162,75,.55);
  box-shadow:0 22px 44px -28px rgba(0,0,0,.95);
}
.card__title{font-family:var(--font-display);font-size:18px;margin-bottom:8px}
.card__text{font-size:14px;color:var(--c-grey);line-height:1.8}
.card__meta{margin-top:14px;font-size:12px;letter-spacing:.08em;color:rgba(184,174,160,.75)}

/* ---------- 标签与状态 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border:1px solid var(--c-line);border-radius:999px;
  font-size:11.5px;letter-spacing:.14em;color:var(--c-grey);white-space:nowrap;
}
.tag--gold{color:var(--c-gold-lite);border-color:rgba(201,162,75,.5);background:rgba(201,162,75,.08)}
.tag--ok{color:var(--c-ok);border-color:rgba(79,157,122,.55);background:rgba(79,157,122,.1)}
.tag--warn{color:var(--c-warn);border-color:rgba(210,122,74,.55);background:rgba(210,122,74,.1)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:12px 24px;border:1px solid transparent;border-radius:2px;
  font-size:14px;letter-spacing:.1em;line-height:1.2;
  transition:background-color var(--dur) ease,color var(--dur) ease,border-color var(--dur) ease,transform var(--dur) ease;
}
.btn:hover{transform:translateY(-1px)}
.btn--gold{background:var(--c-gold);color:#170D28;border-color:var(--c-gold)}
.btn--gold:hover{background:var(--c-gold-lite);border-color:var(--c-gold-lite)}
.btn--ghost{background:transparent;color:var(--c-white);border-color:var(--c-line)}
.btn--ghost:hover{border-color:var(--c-gold);color:var(--c-gold-lite)}

/* ---------- 面包屑 ---------- */
.breadcrumbs{margin-bottom:26px;font-size:12.5px;letter-spacing:.08em;color:var(--c-grey)}
.breadcrumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumbs__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumbs__item:not(:last-child)::after{content:"／";color:var(--c-line)}
.breadcrumbs__link{color:var(--c-grey);transition:color var(--dur) ease}
.breadcrumbs__link:hover,.breadcrumbs__link:focus-visible{color:var(--c-gold-lite)}
.breadcrumbs__item[aria-current="page"]{color:var(--c-gold-lite)}

/* ---------- 目录轴 / 时间线 ---------- */
.rail{list-style:none;border-left:1px solid var(--c-line);padding-left:0}
.rail__item{position:relative;padding:0 0 22px 24px}
.rail__item:last-child{padding-bottom:0}
.rail__item::before{
  content:"";position:absolute;left:-5px;top:9px;
  width:9px;height:9px;border-radius:50%;
  background:var(--c-purple);border:1px solid var(--c-line);
  transition:background-color var(--dur) ease,box-shadow var(--dur) ease,border-color var(--dur) ease;
}
.rail__item.is-active::before{
  background:var(--c-gold-lite);border-color:var(--c-gold);
  box-shadow:0 0 0 5px rgba(232,200,122,.14);
}
.rail__link{display:block;font-size:13.5px;line-height:1.6;color:var(--c-grey);transition:color var(--dur) ease}
.rail__link:hover,.rail__link:focus-visible{color:var(--c-white)}
.rail__item.is-active .rail__link{color:var(--c-gold-lite)}
.rail__time{display:block;margin-top:2px;font-size:11.5px;letter-spacing:.12em;color:rgba(184,174,160,.6)}

/* ---------- 图片容器基础规则（页面阶段放图） ---------- */
.media-frame{
  position:relative;display:block;overflow:hidden;
  border:1px solid var(--c-line);border-radius:var(--rad);
  aspect-ratio:16 / 10;
  background:
    radial-gradient(120% 120% at 18% 0%, #2B1A4A 0%, #150C26 58%, #0B0812 100%);
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.22;
  background-image:
    repeating-linear-gradient(115deg, rgba(244,239,230,.06) 0 1px, transparent 1px 3px),
    repeating-linear-gradient(0deg, rgba(11,8,18,.35) 0 2px, transparent 2px 4px);
}
.media-frame__img{width:100%;height:100%;object-fit:cover;filter:saturate(.88) contrast(1.06) brightness(.92)}
.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:0;right:0;bottom:0;z-index:2;
  padding:14px 16px;font-size:12px;letter-spacing:.08em;color:var(--c-grey);
  background:linear-gradient(180deg,transparent,rgba(11,8,18,.9));
}

/* ---------- 显现动效钩子 ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .42s ease,transform .42s ease}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- 工具类 ---------- */
.u-visually-hidden{
  position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}
.u-gold{color:var(--c-gold-lite)}
.u-muted{color:var(--c-grey)}
.u-mt-lg{margin-top:clamp(28px,4vw,48px)}

/* ---------- 响应式：平板 ---------- */
@media (max-width:1040px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .header-motto{display:none}
}
@media (max-width:900px){
  .site-header[data-open="true"]{box-shadow:0 26px 50px -32px rgba(0,0,0,.95)}
  .header-upper__inner{justify-content:space-between;padding-block:12px}
  .header-meta{font-size:11px}
  .brand__seal{width:34px;height:34px;font-size:17px}
  .brand__name{font-size:15.5px}
  .nav-toggle{display:inline-flex}
  .primary-nav{
    position:absolute;left:0;right:0;top:100%;z-index:6;
    background:#1E1236;
    border-top:1px solid var(--c-line);
    border-bottom:1px solid var(--c-line);
    box-shadow:0 26px 44px -26px rgba(0,0,0,.95);
    max-height:0;overflow:hidden;visibility:hidden;
    transition:max-height .3s ease,visibility .3s ease;
  }
  .site-header[data-open="true"] .primary-nav{max-height:78vh;overflow-y:auto;visibility:visible}
  .nav-list{flex-direction:column;align-items:stretch;gap:0;padding:6px 0}
  .nav-item{border-bottom:1px solid rgba(58,42,90,.5)}
  .nav-item:last-child{border-bottom:0}
  .nav-link{display:block;padding:15px clamp(18px,4vw,40px);font-size:15px}
  .nav-link::after{left:clamp(18px,4vw,40px);right:auto;bottom:11px;width:22px}
  .header-lower__inner{min-height:56px}
  .grid--2,.grid--3{grid-template-columns:minmax(0,1fr)}
  .grid--aside{grid-template-columns:minmax(0,1fr)}
  .footer-inner{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:560px){
  .header-meta{display:none}
  .header-cta{display:none}
  .header-upper__inner{padding-top:13px;padding-bottom:11px}
  .footer-inner{grid-template-columns:minmax(0,1fr);gap:30px}
  .footer-bottom__inner{flex-direction:column;align-items:flex-start}
  .footer-contact__key{flex:0 0 62px}
  .btn{width:100%}
  .btn.header-cta{width:auto}
}

/* ---------- 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;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
  .card:hover,.card:focus-within,.btn:hover{transform:none}
}