/* ============================================================
   云顶看台 · 共享外壳样式 /assets/site.css
   夜间看台秩序感：深靛蓝底 + 雾银灰文本 + 信号橙路径 + 青绿口径
   ============================================================ */

:root{
  --ink:#0B1B33;
  --night:#132A47;
  --silver:#C7D0D9;
  --paper:#F2E9DC;
  --signal:#FF6B35;
  --teal:#5FA89F;
  --teal-soft:#A8CFC9;
  --black:#0A0E14;
  --amber:#E0A33E;
  --white:#F7FAFC;

  --line:rgba(199,208,217,.16);
  --line-strong:rgba(199,208,217,.34);
  --glass:rgba(199,208,217,.06);
  --glass-strong:rgba(199,208,217,.12);

  --font-display:"Oswald","Noto Sans SC","PingFang SC","Source Han Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Inter","Noto Sans SC","PingFang SC","Source Han Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono","Noto Sans Mono","SFMono-Regular",Menlo,Consolas,monospace;

  --wrap:1280px;
  --gutter:clamp(18px,4.5vw,48px);
  --radius:3px;
  --speed:.28s;
}

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

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:104px;
}

body{
  margin:0;
  background-color:var(--ink);
  color:var(--silver);
  font-family:var(--font-body);
  font-size:1rem;
  font-weight:400;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

h1,h2,h3,h4{
  margin:0 0 .6em;
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.14;
  letter-spacing:-.01em;
  color:var(--white);
}
h1{font-size:clamp(2.4rem,7vw,6rem)}
h2{font-size:clamp(1.5rem,3vw,2.4rem)}
h3{font-size:clamp(1.1rem,1.8vw,1.35rem)}
p{margin:0 0 1em}
a{color:var(--teal-soft);text-decoration:none;transition:color var(--speed) ease}
a:hover{color:var(--white)}
ul,ol{margin:0;padding:0;list-style:none}
img,picture,video{max-width:100%;height:auto;display:block}
button{font:inherit;color:inherit}
hr{border:0;border-top:1px solid var(--line);margin:2rem 0}

:focus-visible{outline:2px solid var(--signal);outline-offset:3px;border-radius:2px}

.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}

/* ---------- 跳过链接 ---------- */
.skip-link{
  position:absolute;
  left:12px;
  top:-64px;
  z-index:200;
  padding:10px 18px;
  background:var(--signal);
  color:var(--black);
  font-weight:700;
  border-radius:var(--radius);
  transition:top var(--speed) ease;
}
.skip-link:focus{top:12px;color:var(--black)}

/* ---------- 页头：左右分置 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  background:rgba(11,27,51,.9);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line);
  color:var(--silver);
}
.header-grid{
  max-width:1360px;
  margin-inline:auto;
  padding:14px var(--gutter);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:clamp(14px,3vw,40px);
}

.brand-block{
  display:flex;
  align-items:center;
  gap:clamp(10px,1.6vw,20px);
  min-width:0;
}
.brand-mark{
  display:inline-flex;
  align-items:center;
  gap:12px;
  color:var(--white);
}
.brand-mark:hover{color:var(--white)}
.brand-glyph{
  display:grid;
  place-items:center;
  width:40px;
  height:40px;
  flex:0 0 auto;
  border:1px solid var(--line-strong);
  background:linear-gradient(150deg,var(--night),var(--black));
  color:var(--signal);
  font-family:var(--font-display);
  font-weight:800;
  font-size:1.15rem;
  line-height:1;
  border-radius:2px;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{
  font-family:var(--font-display);
  font-weight:800;
  font-size:1.15rem;
  letter-spacing:.04em;
  color:var(--white);
}
.brand-sub{
  font-family:var(--font-mono);
  font-size:.5625rem;
  letter-spacing:.24em;
  color:rgba(199,208,217,.6);
}
.season-badge{
  display:inline-flex;
  align-items:center;
  gap:7px;
  margin:0;
  padding:5px 12px;
  border:1px solid rgba(224,163,62,.45);
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.08em;
  color:var(--amber);
  white-space:nowrap;
}
.season-dot{
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--amber);
  box-shadow:0 0 0 3px rgba(224,163,62,.16);
}

.primary-nav{
  display:flex;
  align-items:center;
  gap:clamp(6px,1.2vw,18px);
}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-list a{
  display:block;
  padding:9px 12px;
  color:var(--silver);
  font-size:.9375rem;
  border-bottom:2px solid transparent;
  transition:color var(--speed) ease,border-color var(--speed) ease,background-color var(--speed) ease;
}
.nav-list a:hover{
  color:var(--white);
  border-bottom-color:var(--line-strong);
  background:rgba(199,208,217,.06);
}
.nav-list a[aria-current="page"]{
  color:var(--signal);
  border-bottom-color:var(--signal);
  background:rgba(255,107,53,.09);
}

.nav-cta{
  display:inline-flex;
  align-items:center;
  padding:10px 18px;
  background:var(--signal);
  color:var(--black);
  font-weight:700;
  font-size:.9375rem;
  letter-spacing:.02em;
  border-radius:2px;
  box-shadow:0 0 0 0 rgba(255,107,53,.4);
  transition:transform var(--speed) ease,box-shadow var(--speed) ease,background-color var(--speed) ease;
}
.nav-cta:hover{
  color:var(--black);
  background:#ff7f52;
  transform:translateY(-1px);
  box-shadow:0 8px 22px -10px rgba(255,107,53,.9);
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 15px;
  background:rgba(199,208,217,.07);
  border:1px solid var(--line);
  border-radius:999px;
  color:var(--silver);
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.14em;
  cursor:pointer;
}
.nav-toggle:hover{border-color:var(--line-strong);color:var(--white)}
.nav-toggle-bars{display:inline-flex;flex-direction:column;gap:3px;width:16px}
.nav-toggle-bars span{
  display:block;
  height:2px;
  background:currentColor;
  transition:transform var(--speed) ease,opacity var(--speed) ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

.read-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  background:rgba(199,208,217,.12);
  overflow:hidden;
}
.read-progress > span{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--signal),var(--amber));
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  background:var(--black);
  color:rgba(199,208,217,.82);
  border-top:1px solid var(--line);
}
.footer-signal{
  height:3px;
  background:linear-gradient(90deg,var(--signal) 0 7%,rgba(95,168,159,.8) 7% 22%,rgba(199,208,217,.2) 22% 100%);
}
.footer-horizon{
  position:relative;
  height:78px;
  overflow:hidden;
  background:linear-gradient(180deg,rgba(10,14,20,0) 0%,rgba(19,42,71,.5) 100%);
}
.footer-horizon::before{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:100%;
  background-repeat:repeat-x;
  background-position:0 100%,34px 100%,78px 100%;
  background-size:84px 62%,132px 88%,46px 40%;
  background-image:
    linear-gradient(180deg,rgba(19,42,71,0),rgba(19,42,71,.9)),
    linear-gradient(180deg,rgba(11,27,51,0),rgba(11,27,51,.95)),
    linear-gradient(180deg,rgba(19,42,71,0),rgba(19,42,71,.7));
}
.footer-horizon::after{
  content:"";
  position:absolute;
  right:7%;
  bottom:0;
  width:3px;
  height:54%;
  background:var(--signal);
  opacity:.8;
}

.footer-inner{
  max-width:var(--wrap);
  margin-inline:auto;
  padding:clamp(40px,6vw,72px) var(--gutter) clamp(28px,4vw,48px);
  display:grid;
  gap:clamp(28px,4vw,56px);
  grid-template-columns:minmax(240px,1.1fr) minmax(280px,1.5fr) minmax(260px,1.3fr);
}
.footer-brand .brand-mark{margin-bottom:16px}
.footer-tagline{
  margin:0 0 12px;
  max-width:30ch;
  color:rgba(199,208,217,.86);
  font-size:.9375rem;
  line-height:1.85;
}
.footer-version{
  margin:0;
  font-size:.75rem;
  letter-spacing:.06em;
  color:rgba(224,163,62,.85);
}
.footer-heading{
  margin:0 0 16px;
  font-family:var(--font-mono);
  font-size:.75rem;
  font-weight:500;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:rgba(199,208,217,.55);
}
.footer-legend{display:grid;gap:2px}
.footer-legend li{
  display:flex;
  align-items:baseline;
  gap:12px;
  padding:9px 0;
  border-bottom:1px solid rgba(199,208,217,.09);
}
.legend-index{
  font-size:.6875rem;
  color:rgba(199,208,217,.45);
}
.footer-legend a{
  color:var(--silver);
  font-size:.9375rem;
  transition:color var(--speed) ease,transform var(--speed) ease;
}
.footer-legend a:hover{color:var(--signal)}

.contact-list{display:grid;gap:12px}
.contact-line{display:flex;gap:12px;align-items:baseline}
.contact-key{
  flex:0 0 3.4em;
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.12em;
  color:rgba(95,168,159,.95);
}
.contact-value{
  font-size:.875rem;
  line-height:1.7;
  color:rgba(199,208,217,.86);
  word-break:break-word;
}

.footer-bottom{
  border-top:1px solid rgba(199,208,217,.12);
  background:rgba(11,27,51,.4);
}
.footer-bottom-inner{
  max-width:var(--wrap);
  margin-inline:auto;
  padding:20px var(--gutter) 26px;
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:10px clamp(18px,3vw,36px);
}
.legal-list{display:flex;gap:18px;flex-wrap:wrap}
.legal-list a{
  color:var(--silver);
  font-size:.875rem;
  border-bottom:1px solid rgba(199,208,217,.3);
  padding-bottom:2px;
}
.legal-list a:hover{color:var(--white);border-bottom-color:var(--signal)}
.footer-note{
  margin:0;
  flex:1 1 320px;
  font-size:.8125rem;
  color:rgba(199,208,217,.6);
  line-height:1.7;
}
.footer-copy{
  margin:0;
  font-size:.75rem;
  letter-spacing:.06em;
  color:rgba(199,208,217,.5);
}

/* ---------- 通用布局 ---------- */
.wrap{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{padding-block:clamp(52px,8vw,104px)}
.section--night{background:var(--night)}
.section--paper{background:var(--paper);color:#20242b}
.section--paper h1,.section--paper h2,.section--paper h3{color:#12161c}
.section--tight{padding-block:clamp(32px,4vw,56px)}

.stack > * + *{margin-top:clamp(16px,2.4vw,28px)}
.grid-2{display:grid;gap:clamp(18px,3vw,40px);grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.grid-3{display:grid;gap:clamp(16px,2.4vw,32px);grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.split{display:grid;gap:clamp(24px,4vw,64px);grid-template-columns:minmax(220px,300px) minmax(0,1fr);align-items:start}

/* ---------- 文本组件 ---------- */
.eyebrow{
  margin:0 0 .75rem;
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--amber);
}
.lede{
  max-width:62ch;
  font-size:clamp(1.0625rem,1.6vw,1.25rem);
  line-height:1.9;
  color:rgba(199,208,217,.9);
}
.section--paper .lede{color:#3a4148}
.section-head{max-width:70ch;margin-bottom:clamp(24px,3.5vw,44px)}
.term-band{
  display:flex;
  align-items:center;
  gap:14px;
  padding:13px 20px;
  margin-block:clamp(18px,2.6vw,30px);
  background:linear-gradient(90deg,rgba(255,107,53,.18),rgba(255,107,53,0) 66%);
  border-left:3px solid var(--signal);
  font-family:var(--font-mono);
  font-size:.8125rem;
  letter-spacing:.08em;
  color:var(--white);
}
.prose{
  max-width:74ch;
  font-size:1.0625rem;
  line-height:1.95;
  color:rgba(199,208,217,.92);
}
.prose h2{margin-top:2.2em;font-size:clamp(1.4rem,2.6vw,2rem)}
.prose h3{margin-top:1.8em}
.prose ul{margin:0 0 1.2em}
.prose li{position:relative;padding-left:1.2em;margin-bottom:.55em}
.prose li::before{
  content:"";
  position:absolute;
  left:0;
  top:.85em;
  width:9px;
  height:2px;
  background:var(--signal);
}
.prose--paper{color:#272c33}
.prose--paper h2,.prose--paper h3{color:#12161c}
.prose--paper li::before{background:var(--teal)}

/* ---------- 面板与卡片 ---------- */
.panel{
  padding:clamp(18px,2.4vw,30px);
  border-radius:var(--radius);
}
.panel--glass{
  background:var(--glass);
  border:1px solid var(--line);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
}
.panel--paper{
  background:var(--paper);
  color:#20242b;
  border:1px solid rgba(10,14,20,.1);
}
.rule-card{
  padding:clamp(18px,2.4vw,30px);
  background:var(--night);
  border:1px solid var(--line);
  border-left:3px solid var(--signal);
  border-radius:var(--radius);
}
.rule-card h3{margin-bottom:.4em}
.rule-card p:last-child{margin-bottom:0}

.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 11px;
  border-radius:999px;
  border:1px solid var(--line-strong);
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.1em;
  color:var(--silver);
}
.chip--amber{border-color:rgba(224,163,62,.5);color:var(--amber)}
.chip--teal{border-color:rgba(95,168,159,.55);color:var(--teal-soft);background:rgba(95,168,159,.12)}
.chip--signal{border-color:rgba(255,107,53,.55);color:var(--signal);background:rgba(255,107,53,.1)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  padding:12px 22px;
  border:1px solid transparent;
  border-radius:2px;
  font-size:.9375rem;
  font-weight:700;
  letter-spacing:.02em;
  line-height:1.2;
  cursor:pointer;
  transition:transform var(--speed) ease,background-color var(--speed) ease,border-color var(--speed) ease,color var(--speed) ease;
}
.btn--signal{background:var(--signal);color:var(--black)}
.btn--signal:hover{color:var(--black);background:#ff7f52;transform:translateY(-1px)}
.btn--ghost{
  background:rgba(199,208,217,.05);
  border-color:var(--line-strong);
  color:var(--silver);
}
.btn--ghost:hover{color:var(--white);border-color:var(--white);transform:translateY(-1px)}
.btn--teal{background:var(--teal);color:var(--black)}
.btn--teal:hover{color:var(--black);background:var(--teal-soft)}
.btn-row{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  font-family:var(--font-mono);
  font-size:.8125rem;
  letter-spacing:.05em;
  color:rgba(199,208,217,.7);
}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:0 10px}
.breadcrumb li{display:flex;align-items:center;gap:10px}
.breadcrumb li:not(:last-child)::after{content:"/";color:rgba(199,208,217,.35)}
.breadcrumb a{color:rgba(199,208,217,.78)}
.breadcrumb a:hover{color:var(--signal)}
.breadcrumb [aria-current="page"]{color:var(--white)}

/* ---------- 章节索引 ---------- */
.index-rail{position:sticky;top:104px}
.index-list{
  display:grid;
  gap:1px;
  border-left:1px solid var(--line);
}
.index-list a{
  display:block;
  padding:9px 0 9px 16px;
  margin-left:-1px;
  border-left:2px solid transparent;
  font-family:var(--font-mono);
  font-size:.8125rem;
  letter-spacing:.06em;
  color:rgba(199,208,217,.72);
  transition:color var(--speed) ease,border-color var(--speed) ease,background-color var(--speed) ease;
}
.index-list a:hover{color:var(--white);background:rgba(199,208,217,.05)}
.index-list a[aria-current="true"]{
  color:var(--signal);
  border-left-color:var(--signal);
  background:linear-gradient(90deg,rgba(255,107,53,.16),rgba(255,107,53,0) 78%);
}

/* ---------- 数据表（结算口径） ---------- */
.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius)}
.data-table{
  width:100%;
  min-width:520px;
  border-collapse:collapse;
  font-size:.9375rem;
  background:rgba(95,168,159,.05);
}
.data-table caption{
  caption-side:top;
  padding:12px 14px;
  text-align:left;
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.1em;
  color:var(--teal-soft);
}
.data-table th,.data-table td{
  padding:12px 14px;
  text-align:left;
  vertical-align:top;
  border-bottom:1px solid var(--line);
}
.data-table thead th{
  background:rgba(95,168,159,.18);
  color:var(--white);
  font-family:var(--font-mono);
  font-size:.75rem;
  font-weight:500;
  letter-spacing:.12em;
  text-transform:uppercase;
}
.data-table tbody tr{transition:background-color var(--speed) ease}
.data-table tbody tr:hover{background:rgba(95,168,159,.14)}
.data-table .num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;color:var(--teal-soft)}
.data-table tbody tr:last-child td{border-bottom:0}

/* ---------- 图像容器（页面阶段放入 img） ---------- */
.figure-frame{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--radius);
  aspect-ratio:16 / 9;
  background:linear-gradient(155deg,var(--night) 0%,var(--ink) 58%,var(--black) 100%);
}
.figure-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    repeating-linear-gradient(90deg,rgba(199,208,217,.09) 0 1px,transparent 1px 56px),
    repeating-linear-gradient(0deg,rgba(199,208,217,.07) 0 1px,transparent 1px 56px);
}
.figure-frame img,
.figure-frame picture{width:100%;height:100%;object-fit:cover}
.figure-frame--plan{aspect-ratio:4 / 3}
.figure-frame--tall{aspect-ratio:3 / 4}
.figure-frame--band{aspect-ratio:21 / 9}
.figure-grid{
  display:grid;
  gap:clamp(14px,2vw,24px);
  grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
}

/* ---------- 滚动显现 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .6s ease,transform .6s ease;
}
[data-reveal].is-revealed{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .split{grid-template-columns:1fr}
  .index-rail{position:static}
  .footer-inner{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1 / -1}
}

@media (max-width:980px){
  :root{--gutter:18px}
  html{scroll-padding-top:88px}
  .nav-toggle{display:inline-flex}
  .primary-nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    display:grid;
    gap:0;
    background:rgba(10,14,20,.98);
    border-bottom:1px solid var(--line);
    box-shadow:0 26px 40px -26px rgba(0,0,0,.9);
    opacity:0;
    visibility:hidden;
    max-height:0;
    overflow:hidden;
    transition:max-height .38s ease,opacity .3s ease,visibility .3s ease;
  }
  .primary-nav[data-open]{
    opacity:1;
    visibility:visible;
    max-height:min(78vh,620px);
    overflow-y:auto;
  }
  .nav-list{display:grid;gap:0;padding:6px 0}
  .nav-list a{
    padding:14px 20px;
    border-bottom:0;
    border-left:3px solid transparent;
    font-size:1rem;
  }
  .nav-list a:hover,
  .nav-list a[aria-current="page"]{
    background:rgba(255,107,53,.1);
    border-left-color:var(--signal);
    border-bottom-color:transparent;
  }
  .nav-cta{
    order:-1;
    margin:14px 16px 8px;
    padding:14px 18px;
    justify-content:center;
  }
  .header-grid{padding-block:12px}
  .season-badge{display:none}
  .brand-glyph{width:36px;height:36px;font-size:1.05rem}
}

@media (max-width:720px){
  .footer-inner{grid-template-columns:1fr;gap:32px}
  .footer-bottom-inner{flex-direction:column;align-items:flex-start}
  .footer-note{flex:1 1 auto}
  .footer-horizon{height:60px}
  .term-band{font-size:.75rem;padding:11px 15px}
  .breadcrumb{font-size:.75rem}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  [data-reveal]{opacity:1;transform:none}
  .figure-frame::after{display:none}
}