/* ============================================================
   云顶集团中心 / site.css
   01 变量与重置 · 02 基础排版 · 03 头部 · 04 页脚
   05 通用组件 · 06 响应式与可访问性
   ============================================================ */

/* ---------- 01 变量与重置 ---------- */
:root{
  --ink:#101820;
  --deep:#0B1F3A;
  --night:#071426;
  --star:#163A63;
  --gold:#C9A45C;
  --gold-soft:#E7D3A2;
  --mist:#A8B3C2;
  --warm:#F6F2E8;
  --paper:#FBF8F0;
  --slate:#6F8FA6;

  --ink-70:rgba(16,24,32,.72);
  --ink-55:rgba(16,24,32,.55);
  --line:rgba(16,24,32,.14);
  --line-soft:rgba(16,24,32,.08);
  --line-invert:rgba(246,242,232,.16);

  --rail-w:88px;
  --topbar-h:52px;
  --topbar-h-sm:38px;
  --mobilebar-h:54px;
  --shell-max:1180px;

  --font-display:"HarmonyOS Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-serif:"Source Han Serif SC","Songti SC","STSong","SimSun",serif;
  --font-body:"Source Han Sans SC","PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --ease:cubic-bezier(.22,.61,.36,1);
  --t-fast:180ms;
  --t-mid:240ms;
  --shadow-float:0 24px 60px -30px rgba(7,20,38,.55);
}

*,*::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,dt,figure,blockquote,pre{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
table{border-collapse:collapse;width:100%}

/* ---------- 02 基础排版 ---------- */
body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--warm);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
@media (min-width:1024px){
  body{padding-left:var(--rail-w);padding-top:var(--topbar-h)}
}
@media (max-width:1023px){
  body{padding-top:calc(var(--mobilebar-h) + var(--topbar-h-sm))}
}
html.is-nav-open,
html.is-nav-open body{overflow:hidden}

::selection{background:rgba(201,164,92,.32);color:var(--ink)}

/* ---------- 03 头部 ---------- */
.site-header{position:relative;z-index:100}

.skip-link{
  position:fixed;top:10px;left:10px;z-index:300;
  display:inline-block;
  padding:.65em 1.1em;
  background:var(--gold);color:var(--night);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;
  border-radius:2px;
  transform:translateY(-180%);
  transition:transform var(--t-fast) var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{transform:translateY(0)}

/* 桌面侧轨 / 移动抽屉 */
.rail{
  position:fixed;inset:0 auto 0 0;
  z-index:90;
  width:var(--rail-w);
  display:flex;flex-direction:column;align-items:center;justify-content:space-between;
  gap:16px;
  padding:20px 0 18px;
  background:
    radial-gradient(120% 60% at 50% 0%,rgba(22,58,99,.85),transparent 62%),
    linear-gradient(180deg,#0B1F3A 0%,#071426 58%,#0B1F3A 100%);
  color:var(--warm);
  overflow-y:auto;
  overscroll-behavior:contain;
  scrollbar-width:none;
}
.rail::-webkit-scrollbar{display:none}
.rail::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(180deg,rgba(231,211,162,.10) 0 1px,transparent 1px 84px);
  opacity:.7;
}

.rail__brand{
  position:relative;z-index:1;
  width:100%;
  display:flex;flex-direction:column;align-items:center;gap:8px;
  padding-bottom:14px;
  border-bottom:1px solid var(--line-invert);
}
.rail__brand-mark{display:flex;flex-direction:column;align-items:center;gap:3px;width:24px}
.rail__brand-mark span{display:block;height:2px;width:100%;border-radius:2px;background:var(--gold)}
.rail__brand-mark span:nth-child(2){width:68%;background:var(--gold-soft)}
.rail__brand-mark span:nth-child(3){width:40%;background:var(--mist)}
.rail__brand-text{
  writing-mode:vertical-rl;text-orientation:upright;
  font-family:var(--font-display);font-size:12px;font-weight:600;
  letter-spacing:.2em;color:var(--warm);
}

.rail__nav{position:relative;z-index:1;width:100%}
.rail__list{display:flex;flex-direction:column;align-items:center;gap:2px}
.rail__link{
  position:relative;
  display:flex;flex-direction:column;align-items:center;gap:5px;
  width:100%;padding:9px 4px;
  border-radius:3px;
  transition:background var(--t-fast) var(--ease);
}
.rail__index{
  font-family:var(--font-mono);font-size:9px;letter-spacing:.1em;
  color:var(--gold);opacity:.85;
}
.rail__label{
  writing-mode:vertical-rl;text-orientation:upright;
  font-size:12.5px;letter-spacing:.12em;
  color:rgba(246,242,232,.74);
  transition:color var(--t-fast) var(--ease);
}
.rail__link:hover{background:rgba(201,164,92,.10)}
.rail__link:hover .rail__label{color:var(--warm)}
.rail__link[aria-current="page"]{background:rgba(201,164,92,.14)}
.rail__link[aria-current="page"] .rail__label{color:var(--gold-soft)}
.rail__link[aria-current="page"] .rail__index{opacity:1}
.rail__link[aria-current="page"]::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:2px;
  background:var(--gold);border-radius:2px;
}
.rail__deco{
  position:relative;z-index:1;
  width:1px;height:34px;
  background:linear-gradient(180deg,rgba(201,164,92,.7),rgba(201,164,92,0));
}

/* 移动顶栏 */
.mobilebar{display:none}
.mobilebar__brand{display:flex;align-items:center;gap:10px;color:var(--warm)}
.mobilebar__mark{
  width:16px;height:16px;border-radius:2px;
  background:linear-gradient(150deg,var(--gold),var(--gold-soft) 55%,var(--star));
}
.mobilebar__name{font-family:var(--font-display);font-size:15px;font-weight:600;letter-spacing:.02em}
.nav-toggle{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 12px;
  border:1px solid rgba(201,164,92,.45);
  border-radius:2px;
  color:var(--gold-soft);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  transition:background var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease);
}
.nav-toggle:hover{background:rgba(201,164,92,.14);border-color:var(--gold)}
.nav-toggle__bars{display:flex;flex-direction:column;gap:3px;width:14px}
.nav-toggle__bars i{display:block;height:1.5px;background:currentColor;border-radius:1px}
.nav-toggle__bars i:nth-child(2){width:70%}
.nav-toggle__text{line-height:1}

/* 遮罩 */
.nav-scrim{display:none}

/* 顶部任务带 */
.topbar{
  position:fixed;top:0;left:var(--rail-w);right:0;z-index:80;
  height:var(--topbar-h);
  display:flex;align-items:center;gap:18px;
  padding:0 clamp(16px,3vw,40px);
  background:rgba(251,248,240,.86);
  -webkit-backdrop-filter:blur(16px) saturate(1.1);
  backdrop-filter:blur(16px) saturate(1.1);
  border-bottom:1px solid var(--line-soft);
  overflow-x:auto;
  scrollbar-width:none;
}
.topbar::-webkit-scrollbar{display:none}
.taskbar{display:flex;align-items:center;gap:4px;flex:1;min-width:0}
.taskbar li{display:flex}
.taskbar__link{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 12px;border-radius:999px;
  font-size:13px;white-space:nowrap;
  color:var(--ink-70);
  border:1px solid transparent;
  transition:background var(--t-fast) var(--ease),color var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease);
}
.taskbar__link:hover{background:rgba(22,58,99,.08);color:var(--star);border-color:rgba(22,58,99,.16)}
.taskbar__num{font-family:var(--font-mono);font-size:10px;letter-spacing:.1em;color:var(--gold)}
.topbar__hint{
  margin-left:auto;display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  color:var(--slate);white-space:nowrap;
}
.topbar__dot{
  width:6px;height:6px;border-radius:50%;background:var(--gold);
  box-shadow:0 0 0 4px rgba(201,164,92,.16);
}

/* ---------- 04 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(64px,9vw,120px);
  overflow:hidden;
  isolation:isolate;
  color:var(--warm);
  background:
    radial-gradient(120% 90% at 10% 0%,rgba(22,58,99,.9),transparent 62%),
    radial-gradient(90% 70% at 94% 6%,rgba(201,164,92,.16),transparent 64%),
    linear-gradient(180deg,#071426 0%,#0B1F3A 68%,#071426 100%);
}
.site-footer::before{
  content:"";position:absolute;inset:auto -12% -34% -12%;height:72%;
  background-image:repeating-radial-gradient(circle at 50% 118%,rgba(231,211,162,.13) 0 1px,transparent 1px 46px);
  pointer-events:none;z-index:0;opacity:.85;
}
.footer__inner{
  position:relative;z-index:1;
  width:100%;max-width:1320px;margin-inline:auto;
  padding:clamp(48px,7vw,88px) clamp(20px,5vw,56px) 32px;
}
.footer__top{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,1fr) minmax(0,1.15fr);
  gap:clamp(28px,4vw,60px);
}
.footer__kicker{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;
  color:var(--gold);
}
.footer__wordmark{
  margin-top:14px;
  font-family:var(--font-display);font-weight:700;
  font-size:clamp(1.6rem,3vw,2.35rem);
  line-height:1.1;letter-spacing:-.02em;color:var(--warm);
}
.footer__tagline{
  margin-top:12px;
  font-family:var(--font-serif);font-size:15px;line-height:1.7;
  color:rgba(246,242,232,.66);
}
.footer__cta{margin-top:24px}
.footer__col-title{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.24em;
  color:var(--mist);text-transform:uppercase;
}
.footer__list{margin-top:16px;display:grid;gap:10px}
.footer__list a{
  display:inline-block;font-size:14.5px;
  color:rgba(246,242,232,.78);
  transition:color var(--t-fast) var(--ease),transform var(--t-fast) var(--ease);
}
.footer__list a:hover{color:var(--gold-soft);transform:translateX(2px)}
.footer__contact{margin-top:16px;display:grid;gap:14px}
.footer__contact-row{display:grid;gap:4px}
.footer__contact dt{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;color:var(--slate);
}
.footer__contact dd{
  font-size:14px;color:var(--warm);letter-spacing:.01em;
  overflow-wrap:anywhere;
}
.footer__note{
  margin-top:16px;
  font-size:12.5px;line-height:1.7;
  color:rgba(246,242,232,.52);
}
.footer__meta{
  margin-top:clamp(36px,5vw,64px);
  padding-top:22px;
  border-top:1px solid rgba(246,242,232,.14);
  display:flex;flex-wrap:wrap;align-items:center;gap:12px 22px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  color:rgba(246,242,232,.55);
}
.footer__mono{white-space:nowrap}
.footer__legal{margin-left:auto;display:flex;flex-wrap:wrap;gap:18px}
.footer__legal a{color:rgba(246,242,232,.72);transition:color var(--t-fast) var(--ease)}
.footer__legal a:hover{color:var(--gold-soft)}
.footer__copy{margin-left:auto;color:rgba(246,242,232,.42)}

/* ---------- 05 通用组件 ---------- */
.shell{
  width:100%;max-width:var(--shell-max);margin-inline:auto;
  padding-inline:clamp(20px,5vw,56px);
}
@media (min-width:1024px){
  .shell{padding-inline:clamp(28px,4vw,64px)}
}

.section{padding-block:clamp(56px,8vw,104px)}
.section--tight{padding-block:clamp(32px,5vw,56px)}
.section--dark{
  background:
    radial-gradient(90% 80% at 88% 0%,rgba(22,58,99,.75),transparent 66%),
    linear-gradient(180deg,#0B1F3A,#071426);
  color:var(--warm);
}
.section--dark .eyebrow{color:var(--gold-soft)}
.section--dark a{color:var(--gold-soft)}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.22em;
  text-transform:uppercase;color:var(--slate);
}
.eyebrow::before{content:"";width:26px;height:1px;background:currentColor;opacity:.6}

.title-xl{
  font-family:var(--font-display);font-weight:700;
  font-size:clamp(2rem,5vw,3.5rem);line-height:1.08;letter-spacing:-.03em;
}
.title-lg{
  font-family:var(--font-serif);font-weight:600;
  font-size:clamp(1.6rem,3.2vw,2.5rem);line-height:1.24;letter-spacing:-.01em;
}
.title-md{
  font-family:var(--font-serif);font-weight:600;
  font-size:clamp(1.2rem,2vw,1.5rem);line-height:1.4;
}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.6em;
  padding:.85em 1.5em;border-radius:2px;
  font-family:var(--font-body);font-size:15px;font-weight:600;letter-spacing:.02em;
  border:1px solid transparent;
  transition:background var(--t-fast) var(--ease),color var(--t-fast) var(--ease),
             border-color var(--t-fast) var(--ease),transform var(--t-fast) var(--ease);
}
.btn:active{transform:translateY(1px)}
.btn--gold{background:var(--gold);color:var(--night)}
.btn--gold:hover{background:var(--gold-soft)}
.btn--ink{background:var(--deep);color:var(--warm)}
.btn--ink:hover{background:var(--star)}
.btn--ghost{border-color:rgba(246,242,232,.34);color:var(--warm)}
.btn--ghost:hover{background:rgba(246,242,232,.1);border-color:var(--gold-soft)}
.btn--line{border-color:var(--line);color:var(--ink)}
.btn--line:hover{border-color:var(--star);color:var(--star)}
.btn__arrow{
  font-family:var(--font-mono);font-size:12px;
  transition:transform var(--t-fast) var(--ease);
}
.btn:hover .btn__arrow{transform:translateX(3px)}

.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:.55em;
  padding-block:18px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  color:var(--slate);
}
.breadcrumb a{color:var(--star)}
.breadcrumb a:hover{color:var(--gold)}
.breadcrumb__sep{opacity:.45}
.breadcrumb [aria-current="page"]{color:var(--ink-70)}

.prose{max-width:70ch;font-size:clamp(16px,1.05vw,17.5px);line-height:1.8;color:var(--ink-70)}
.prose > * + *{margin-top:1.1em}
.prose h2,.prose h3{font-family:var(--font-serif);color:var(--ink);line-height:1.4}
.prose h2{font-size:1.4rem;margin-top:2em}
.prose h3{font-size:1.15rem;margin-top:1.6em}
.prose ul,.prose ol{padding-left:1.2em;list-style:disc}
.prose ol{list-style:decimal}
.prose li + li{margin-top:.45em}
.prose a{color:var(--star);text-decoration:underline;text-underline-offset:.22em;text-decoration-color:rgba(22,58,99,.32)}

.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(min(100%,320px),1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr))}

.plate{
  position:relative;
  padding:clamp(20px,2.6vw,32px);
  background:var(--paper);
  border:1px solid var(--line-soft);
  border-radius:3px;
}
.plate__no{
  display:block;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;color:var(--gold);
}
.plate__title{
  margin-top:.55em;
  font-family:var(--font-serif);font-size:1.15rem;line-height:1.4;color:var(--ink);
}
.plate__text{margin-top:.6em;font-size:14.5px;line-height:1.75;color:var(--ink-70)}
.plate--glass{
  background:linear-gradient(160deg,rgba(246,242,232,.16),rgba(246,242,232,.04));
  border-color:rgba(246,242,232,.2);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  box-shadow:var(--shadow-float);
}
.plate--glass .plate__title{color:var(--warm)}
.plate--glass .plate__text{color:rgba(246,242,232,.74)}

.media{
  position:relative;overflow:hidden;border-radius:3px;
  aspect-ratio:16/10;
  background:linear-gradient(155deg,#163A63 0%,#0B1F3A 58%,#071426 100%);
  isolation:isolate;
}
.media--wide{aspect-ratio:21/9}
.media--portrait{aspect-ratio:4/5}
.media--square{aspect-ratio:1/1}
.media img{width:100%;height:100%;object-fit:cover}
.media::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(7,20,38,0) 46%,rgba(7,20,38,.48) 100%);
}
.media--sky::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-radial-gradient(circle at 72% 118%,rgba(231,211,162,.16) 0 1px,transparent 1px 34px);
  opacity:.9;
}
.media__cap{
  position:absolute;left:14px;bottom:12px;z-index:2;
  font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;
  color:rgba(246,242,232,.82);
}

.tabs{width:100%}
.tabs__list{
  display:flex;flex-wrap:wrap;gap:6px;
  border-bottom:1px solid var(--line);
}
.tabs__btn{
  position:relative;
  padding:.7em 1.05em;
  font-size:14px;color:var(--ink-55);
  border-bottom:2px solid transparent;
  transition:color var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease);
}
.tabs__btn:hover{color:var(--ink)}
.tabs__btn[aria-selected="true"]{color:var(--ink);border-bottom-color:var(--gold);font-weight:600}
.tabs__panel{padding-top:clamp(18px,2.4vw,28px)}
.tabs__panel[hidden]{display:none}

[data-reveal]{
  opacity:0;transform:translateY(14px);
  transition:opacity 420ms var(--ease),transform 420ms var(--ease);
}
[data-reveal].is-in{opacity:1;transform:none}

.scroll-progress{
  position:fixed;top:0;left:var(--rail-w);right:0;height:2px;
  z-index:120;pointer-events:none;
}
.scroll-progress__bar{
  height:100%;width:0;
  background:linear-gradient(90deg,var(--gold),var(--gold-soft));
  transition:width 90ms linear;
}

/* ---------- 06 响应式与可访问性 ---------- */
:where(a,button,[tabindex],summary):focus-visible{
  outline:2px solid var(--gold);
  outline-offset:3px;
  border-radius:2px;
}

@media (max-width:1023px){
  .rail{
    width:min(84vw,320px);
    align-items:stretch;
    gap:10px;
    padding:16px 18px 26px;
    transform:translateX(-102%);
    transition:transform var(--t-mid) var(--ease);
    box-shadow:var(--shadow-float);
    z-index:95;
  }
  .site-header[data-open] .rail{transform:translateX(0)}

  .rail__brand{
    flex-direction:row;align-items:center;justify-content:flex-start;gap:12px;
    padding-bottom:14px;
  }
  .rail__brand-mark{width:22px}
  .rail__brand-text{
    writing-mode:horizontal-tb;text-orientation:initial;
    font-size:15px;letter-spacing:.06em;
  }
  .rail__list{align-items:stretch;gap:2px}
  .rail__link{
    flex-direction:row;align-items:center;justify-content:space-between;
    gap:12px;padding:13px 10px;
    border-bottom:1px solid rgba(246,242,232,.08);
    border-radius:3px;
  }
  .rail__label{
    writing-mode:horizontal-tb;text-orientation:initial;
    font-size:15px;letter-spacing:.06em;order:2;
  }
  .rail__index{order:1;font-size:10px}
  .rail__link[aria-current="page"]::before{top:6px;bottom:6px;left:-2px}
  .rail__deco{height:24px;margin-top:6px}

  .mobilebar{
    position:fixed;top:0;left:0;right:0;z-index:105;
    height:var(--mobilebar-h);
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    padding:0 16px;
    color:var(--warm);
    background:rgba(7,20,38,.94);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
    border-bottom:1px solid rgba(201,164,92,.22);
  }

  .nav-scrim{
    display:block;
    position:fixed;inset:0;z-index:85;
    background:rgba(7,20,38,.58);
    -webkit-backdrop-filter:blur(2px);
    backdrop-filter:blur(2px);
    opacity:0;pointer-events:none;
    transition:opacity var(--t-mid) var(--ease);
  }
  .site-header[data-open] .nav-scrim{opacity:1;pointer-events:auto}

  .topbar{
    left:0;top:var(--mobilebar-h);
    height:var(--topbar-h-sm);
    padding:0 10px;gap:10px;
    background:rgba(246,242,232,.95);
  }
  .topbar__hint{display:none}
  .taskbar__link{font-size:12px;padding:5px 10px;gap:6px}
  .taskbar__num{font-size:9px}

  .scroll-progress{left:0}

  .footer__top{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .footer__brand{grid-column:1 / -1}
  .footer__legal{margin-left:0}
  .footer__copy{margin-left:0}
}

@media (max-width:600px){
  .footer__top{grid-template-columns:1fr}
  .footer__meta{gap:10px 16px;font-size:10.5px}
  .footer__list{grid-template-columns:repeat(2,minmax(0,1fr))}
  .title-xl{font-size:clamp(1.85rem,8vw,2.4rem)}
  .grid--2,.grid--3{grid-template-columns:1fr}
}

@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;
  }
  [data-reveal]{opacity:1;transform:none}
  .scroll-progress__bar{transition:none}
}