/* ============================================================
   鼎盛娱乐会馆 · /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 页头 / 页脚 / 通用组件
   ============================================================ */

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0}
img,svg,video{max-width:100%;display:block}
h1,h2,h3,h4,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}

/* ---------- 变量 ---------- */
:root{
  --indigo:#0B1530;
  --indigo-panel:#14264F;
  --line:#24407A;
  --cinnabar:#C8402E;
  --sand:#E7B86A;
  --silver:#AEB6C2;
  --frost:#F4F1EA;
  --mint:#2FD4C4;
  --haze:#6F819F;
  --ink:#101318;

  --topbar-h:64px;
  --rail-w:176px;
  --container-max:1180px;
  --radius:16px;
  --radius-sm:10px;
  --dur:220ms;
  --ease:cubic-bezier(.22,.61,.36,1);

  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",SFMono-Regular,ui-monospace,Menlo,Consolas,monospace;
}

/* ---------- 基础排版 ---------- */
body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  color:var(--frost);
  background-color:var(--indigo);
  background-image:
    radial-gradient(1100px 560px at 12% -8%, rgba(47,212,196,.09), transparent 62%),
    radial-gradient(900px 520px at 92% -4%, rgba(200,64,46,.12), transparent 66%),
    radial-gradient(700px 700px at 78% 108%, rgba(36,64,122,.42), transparent 70%),
    repeating-linear-gradient(115deg, rgba(36,64,122,.16) 0 1px, transparent 1px 9px);
  background-attachment:fixed;
  padding-top:var(--topbar-h);
  padding-left:var(--rail-w);
  min-height:100vh;
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  letter-spacing:-.04em;
  line-height:1.1;
}
h1{font-size:clamp(36px,6vw,76px)}
h2{font-size:clamp(26px,3.6vw,44px)}
h3{font-size:clamp(19px,2.2vw,24px);letter-spacing:-.02em}
p{max-width:42em}
::selection{background:var(--cinnabar);color:var(--frost)}
:focus-visible{outline:2px solid var(--mint);outline-offset:3px;border-radius:4px}

#main-content{display:block}

/* ---------- 布局容器与栅格 ---------- */
.container{
  width:100%;
  max-width:var(--container-max);
  margin-inline:auto;
  padding-inline:clamp(16px,3vw,40px);
}
.grid{display:grid;gap:clamp(14px,2vw,22px)}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-12{grid-column:span 12}

.section{padding-block:clamp(40px,6vw,76px)}
.section-title{
  font-family:var(--font-display);
  font-weight:900;
  letter-spacing:-.04em;
  line-height:1.08;
  font-size:clamp(28px,4vw,44px);
}
.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(--mint);
}
.eyebrow::before{content:"";width:22px;height:1px;background:currentColor;display:block}
.lead{
  font-size:clamp(15px,1.5vw,18px);
  line-height:1.8;
  color:var(--silver);
  max-width:40em;
}

/* ---------- 表面与信息块 ---------- */
.surface-panel{
  background:var(--indigo-panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
}
.surface-light{
  background:var(--frost);
  color:var(--ink);
  border:1px solid rgba(16,19,24,.14);
  border-radius:var(--radius);
}
.surface-light .lead,
.surface-light .prose{color:#2A3040}
.surface-light a{color:#1B3A7A;text-decoration:underline;text-underline-offset:3px}

.panel{
  padding:clamp(18px,2.4vw,28px);
  background:linear-gradient(160deg, rgba(20,38,79,.94), rgba(11,21,48,.88));
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:0 24px 48px -38px rgba(0,0,0,.95);
}
.panel__title{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(18px,2vw,22px);
  letter-spacing:-.02em;
  line-height:1.3;
}
.prose{
  font-size:16px;
  line-height:1.8;
  color:rgba(244,241,234,.88);
  max-width:38em;
}
.prose p + p{margin-top:1.05em}
.prose h2,.prose h3{margin-top:1.5em;margin-bottom:.5em}
.tag{
  display:inline-flex;
  align-items:center;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.14em;
  padding:3px 9px;
  border:1px solid var(--line);
  border-radius:999px;
  color:var(--silver);
}
.timestamp{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--sand);
}
.timestamp::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--cinnabar);display:block}
.divider{
  border:0;
  height:1px;
  background:var(--line);
  margin-block:clamp(20px,3vw,32px);
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border-radius:999px;
  border:1px solid transparent;
  font-family:var(--font-body);
  font-size:14px;
  font-weight:700;
  letter-spacing:.02em;
  line-height:1.2;
  transition:transform var(--dur) var(--ease),background-color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.btn--primary{
  background:var(--cinnabar);
  color:var(--frost);
  box-shadow:0 10px 26px -14px rgba(200,64,46,.9);
}
.btn--primary:hover{background:#D64A35;transform:translateY(-1px)}
.btn--ghost{
  background:rgba(20,38,79,.55);
  border-color:var(--line);
  color:var(--frost);
}
.btn--ghost:hover{border-color:var(--mint);color:var(--mint)}
.btn--quiet{background:transparent;color:var(--silver);border-color:transparent}
.btn--quiet:hover{color:var(--frost)}
.btn--block{width:100%}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  padding-block:18px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--haze);
}
.breadcrumb__list{display:flex;flex-wrap:wrap;gap:0;align-items:center}
.breadcrumb__list li{display:inline-flex;align-items:center}
.breadcrumb__list li + li::before{content:"/";margin-inline:8px;color:var(--line)}
.breadcrumb a{color:var(--silver)}
.breadcrumb a:hover{color:var(--mint)}
.breadcrumb [aria-current="page"]{color:var(--frost)}

/* ---------- 图片容器（页面阶段放占位图） ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  margin:0;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(140deg,#14264F,#0B1530 70%);
  aspect-ratio:16/10;
}
.media-frame img{width:100%;height:100%;object-fit:cover;display:block}
.media-frame__veil{
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    linear-gradient(180deg, rgba(200,64,46,.14), rgba(11,21,48,.58)),
    repeating-linear-gradient(120deg, rgba(244,241,234,.07) 0 1px, transparent 1px 8px);
  mix-blend-mode:screen;
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-caption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--haze);
}

/* ---------- 滚动进度 ---------- */
.scroll-progress{
  position:fixed;
  inset:0 0 auto 0;
  height:2px;
  width:100%;
  z-index:70;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cinnabar),var(--sand),var(--mint));
  pointer-events:none;
  transition:transform 120ms linear;
}

/* ---------- 显现 ---------- */
.js-reveal [data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity 460ms var(--ease),transform 460ms var(--ease);
}
.js-reveal [data-reveal].is-visible{opacity:1;transform:none}

/* ============================================================
   页头
   ============================================================ */
.site-header{position:relative;z-index:60}

.skip-link{
  position:fixed;
  top:8px;
  left:8px;
  z-index:200;
  padding:10px 18px;
  border-radius:999px;
  background:var(--cinnabar);
  color:var(--frost);
  font-size:13px;
  font-weight:700;
  transform:translateY(-160%);
  transition:transform var(--dur) var(--ease);
}
.skip-link:focus-visible{transform:translateY(0)}

.site-topbar{
  position:fixed;
  inset:0 0 auto 0;
  height:var(--topbar-h);
  z-index:62;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding-inline:clamp(12px,2vw,28px);
  background:rgba(11,21,48,.92);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}

.brand{display:inline-flex;align-items:center;gap:12px;min-width:0}
.brand__mark{
  width:18px;
  height:24px;
  flex:none;
  background:var(--cinnabar);
  clip-path:polygon(0 0,100% 0,100% 100%,50% 76%,0 100%);
  box-shadow:0 0 0 1px rgba(231,184,106,.5) inset;
}
.brand__text{display:flex;flex-direction:column;gap:2px;min-width:0}
.brand__name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:16px;
  letter-spacing:-.02em;
  line-height:1.2;
  color:var(--frost);
  white-space:nowrap;
}
.brand__line{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.2em;
  color:var(--silver);
  white-space:nowrap;
}

.topbar-actions{display:flex;align-items:center;gap:clamp(10px,1.6vw,20px)}
.utility-nav{display:flex;align-items:center;gap:18px}
.utility-link{
  font-size:13px;
  color:var(--silver);
  position:relative;
  padding-block:4px;
  transition:color var(--dur) var(--ease);
}
.utility-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:1px;
  background:var(--cinnabar);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform var(--dur) var(--ease);
}
.utility-link:hover{color:var(--frost)}
.utility-link:hover::after{transform:scaleX(1)}

.version-chip{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  padding:5px 11px;
  border:1px solid var(--line);
  border-radius:999px;
  color:var(--silver);
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.version-chip:hover{color:var(--sand);border-color:var(--sand)}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 14px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(20,38,79,.6);
  color:var(--frost);
}
.nav-toggle__bar{
  position:relative;
  width:16px;
  height:2px;
  background:var(--mint);
  border-radius:2px;
  transition:transform var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.nav-toggle__bar::before,
.nav-toggle__bar::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:2px;
  border-radius:2px;
  background:var(--mint);
  transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.nav-toggle__bar::before{top:-5px}
.nav-toggle__bar::after{top:5px}
.nav-toggle__label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar::before{transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar::after{transform:translateY(-5px) rotate(-45deg)}

/* 左缘索引轴 */
.site-rail{
  position:fixed;
  left:0;
  top:var(--topbar-h);
  bottom:0;
  width:var(--rail-w);
  z-index:61;
  display:flex;
  flex-direction:column;
  gap:16px;
  padding:22px 14px 18px;
  border-right:1px solid var(--line);
  background:linear-gradient(180deg, rgba(20,38,79,.94), rgba(11,21,48,.97));
  overflow-y:auto;
}
.rail-annotation{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.28em;
  color:var(--haze);
  max-height:180px;
  align-self:flex-start;
  margin-left:6px;
}
.site-nav{flex:1 1 auto}
.nav-list{display:flex;flex-direction:column;gap:2px}
.nav-item{min-width:0}
.nav-link{
  display:flex;
  align-items:baseline;
  gap:9px;
  padding:9px 10px;
  border-left:2px solid transparent;
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  font-size:14px;
  color:var(--silver);
  transition:color var(--dur) var(--ease),background-color var(--dur) var(--ease),
             border-color var(--dur) var(--ease);
}
.nav-link__index{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.1em;
  color:var(--haze);
  transition:color var(--dur) var(--ease);
}
.nav-link:hover{color:var(--frost);background:rgba(36,64,122,.4);border-left-color:var(--mint)}
.nav-link:hover .nav-link__index{color:var(--mint)}
.nav-link[aria-current="page"]{
  color:var(--frost);
  font-weight:700;
  border-left-color:var(--cinnabar);
  background:linear-gradient(90deg, rgba(200,64,46,.26), rgba(200,64,46,0));
}
.nav-link[aria-current="page"] .nav-link__index{color:var(--cinnabar)}

.rail-foot{
  margin-top:auto;
  padding-top:14px;
  border-top:1px solid var(--line);
  display:grid;
  gap:10px;
}
.rail-foot__note{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.08em;
  line-height:1.7;
  color:var(--haze);
}

.nav-scrim{display:none}
.nav-scrim[hidden]{display:none}

/* 抽屉开启状态（.site-header[data-open]） */
.site-header[data-open="true"] .nav-scrim{
  display:block;
  position:fixed;
  inset:var(--topbar-h) 0 0 0;
  z-index:60;
  background:rgba(6,11,24,.68);
}
.site-header[data-open="true"] .site-rail{box-shadow:0 30px 60px -30px #000}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  position:relative;
  margin-top:clamp(48px,7vw,88px);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,#0D1A38,#08101F);
  padding-block:clamp(44px,6vw,76px) clamp(56px,7vw,84px);
}
.footer-inner{position:relative}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.35fr;
  gap:clamp(22px,3vw,40px);
}
.footer-brand__name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:22px;
  letter-spacing:-.03em;
  line-height:1.2;
  color:var(--frost);
}
.footer-tagline{
  margin-top:8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--sand);
}
.footer-brand__note{
  margin-top:14px;
  font-size:13px;
  line-height:1.75;
  color:var(--haze);
  max-width:24em;
}
.footer-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.footer-col__title{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.22em;
  color:var(--mint);
  margin-bottom:14px;
}
.footer-links{display:grid;gap:10px}
.footer-links a{
  font-size:14px;
  color:var(--silver);
  transition:color var(--dur) var(--ease);
}
.footer-links a:hover{color:var(--frost);text-decoration:underline;text-underline-offset:4px;text-decoration-color:var(--cinnabar)}
.footer-contact .contact-list{display:grid;gap:12px}
.contact-row{
  display:grid;
  grid-template-columns:40px minmax(0,1fr) auto;
  gap:8px;
  align-items:baseline;
  padding-bottom:8px;
  border-bottom:1px dashed rgba(36,64,122,.9);
  font-size:13px;
}
.contact-label{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.14em;
  color:var(--haze);
}
.contact-value{color:var(--frost);word-break:break-word;line-height:1.6}
.copy-btn{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.1em;
  padding:3px 9px;
  border:1px solid var(--line);
  border-radius:999px;
  background:transparent;
  color:var(--silver);
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.copy-btn:hover{color:var(--mint);border-color:var(--mint)}
.copy-btn[data-copied="true"]{color:var(--mint);border-color:var(--mint)}
.contact-note{
  margin-top:14px;
  font-size:12px;
  line-height:1.75;
  color:var(--haze);
  max-width:30em;
}
.footer-base{
  margin-top:clamp(28px,4vw,44px);
  padding-top:18px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
}
.footer-legal{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--haze);
}
.footer-legal__links{display:flex;flex-wrap:wrap;gap:16px}
.footer-legal__links a{font-size:12px;color:var(--silver)}
.footer-legal__links a:hover{color:var(--mint)}

/* 固定客服触点 */
.support-dock{
  position:fixed;
  right:clamp(12px,2vw,24px);
  bottom:clamp(12px,2vw,24px);
  z-index:45;
  display:flex;
  align-items:center;
  gap:12px;
  padding:9px 10px 9px 16px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(20,38,79,.95);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  box-shadow:0 22px 44px -26px rgba(0,0,0,.95);
}
.support-dock__text{
  display:flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--silver);
  white-space:nowrap;
}
.support-dock__dot{
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--mint);
  box-shadow:0 0 0 0 rgba(47,212,196,.55);
  animation:dock-pulse 2.6s var(--ease) infinite;
}
@keyframes dock-pulse{
  0%{box-shadow:0 0 0 0 rgba(47,212,196,.5)}
  70%{box-shadow:0 0 0 8px rgba(47,212,196,0)}
  100%{box-shadow:0 0 0 0 rgba(47,212,196,0)}
}
.support-dock__cta{
  padding:8px 15px;
  border-radius:999px;
  background:var(--cinnabar);
  color:var(--frost);
  font-size:12px;
  font-weight:700;
  white-space:nowrap;
  transition:background-color var(--dur) var(--ease);
}
.support-dock__cta:hover{background:#D64A35}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1180px){
  :root{--rail-w:156px}
  .nav-link{font-size:13px}
}

@media (max-width:1024px){
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-contact{grid-column:1 / -1}
  .col-4,.col-5,.col-7{grid-column:span 6}
}

@media (max-width:960px){
  :root{--rail-w:0px}
  body{padding-left:0;padding-bottom:84px}
  .utility-nav{display:none}
  .nav-toggle{display:inline-flex}
  .site-rail{
    width:min(86vw,320px);
    transform:translateX(-104%);
    transition:transform var(--dur) var(--ease);
    top:var(--topbar-h);
    padding:22px 18px 22px;
  }
  .site-header[data-open="true"] .site-rail{transform:translateX(0)}
  .rail-annotation{
    writing-mode:horizontal-tb;
    max-height:none;
    margin:0 0 6px;
    letter-spacing:.26em;
  }
  .nav-link{font-size:16px;padding:13px 12px}
  .nav-link__index{font-size:11px}
  .grid--12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .col-4,.col-5,.col-6,.col-7,.col-8{grid-column:span 6}
  .support-dock{
    left:12px;
    right:12px;
    bottom:12px;
    justify-content:space-between;
    border-radius:18px;
  }
}

@media (max-width:640px){
  :root{--topbar-h:58px}
  .brand__line{display:none}
  .brand__name{font-size:15px}
  .version-chip{display:none}
  .grid--12{grid-template-columns:1fr}
  .col-4,.col-5,.col-6,.col-7,.col-8,.col-12{grid-column:1 / -1}
  .footer-grid{grid-template-columns:1fr}
  .footer-base{flex-direction:column;align-items:flex-start}
  .support-dock__text{font-size:10px;letter-spacing:.06em}
  .contact-row{grid-template-columns:36px minmax(0,1fr) auto}
}

@media (max-width:380px){
  .support-dock__text span + *{display:none}
  .support-dock__text{font-size:9px}
}

/* ---------- 无障碍与动效降级 ---------- */
@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;
  }
  .js-reveal [data-reveal]{opacity:1;transform:none}
  .support-dock__dot{animation:none;box-shadow:none}
}