/* =========================================================
   彩娱乐会馆 · 共享样式 /assets/site.css
   框架式导航 + 侧边品牌轨道 + 玻璃索引条 + 墨黑页脚
   ========================================================= */

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;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%}
button,input,select,textarea{font:inherit;color:inherit}
a{color:inherit}
table{border-collapse:collapse;width:100%}

/* ---------- 设计令牌 ---------- */
:root{
  --cinnabar:#B4261E;
  --cinnabar-deep:#7A1512;
  --gold:#C99A3D;
  --gold-soft:#EFDFB8;
  --ink:#14100E;
  --paper:#FAF6EF;
  --jade:#1F6E5E;
  --jade-soft:#D7E8E1;
  --clay:#6B6259;
  --glass:rgba(250,246,239,.72);
  --line:rgba(20,16,14,.12);
  --serif:"Source Han Serif SC","Noto Serif SC","Songti SC","STSong",serif;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --rail-w:88px;
  --masthead-h:64px;
  --maxw:1180px;
  --gutter:clamp(18px,4vw,48px);
  --radius:8px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 中文排版与页面底色 ---------- */
body{
  font-family:var(--sans);
  font-size:17px;
  line-height:1.75;
  font-weight:400;
  color:var(--ink);
  background-color:var(--paper);
  background-image:
    linear-gradient(rgba(20,16,14,.03) 1px,transparent 1px),
    linear-gradient(90deg,rgba(20,16,14,.03) 1px,transparent 1px);
  background-size:72px 72px;
  padding-left:var(--rail-w);
  padding-top:var(--masthead-h);
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:var(--serif);font-weight:900;letter-spacing:-.02em;line-height:1.18;color:var(--ink)}
h1{font-size:clamp(36px,5.6vw,76px)}
h2{font-size:clamp(26px,3.6vw,46px)}
h3{font-size:clamp(20px,2.4vw,30px)}
h4{font-size:19px;line-height:1.42;letter-spacing:0}
p{max-width:34em}
strong{font-weight:500}
::selection{background:var(--gold-soft);color:var(--cinnabar-deep)}
:focus-visible{outline:2px solid var(--jade);outline-offset:3px;border-radius:3px}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;top:10px;left:calc(var(--rail-w) + 12px);z-index:200;
  transform:translateY(-180%);
  background:var(--ink);color:var(--paper);
  padding:10px 18px;border-radius:var(--radius);
  font-size:14px;letter-spacing:.04em;text-decoration:none;
  transition:transform .18s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 阅读进度 ---------- */
.progress{
  position:fixed;inset:0 0 auto 0;height:2px;z-index:130;
  background:rgba(180,38,30,.14);pointer-events:none;
}
.progress__bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--cinnabar),var(--gold));
  transition:width .12s linear;
}

/* ---------- 头部外壳 ---------- */
.site-head{position:relative;z-index:100}

/* 左侧品牌轨道 */
.rail{
  position:fixed;top:0;left:0;bottom:0;z-index:110;
  width:var(--rail-w);
  display:flex;flex-direction:column;align-items:center;
  gap:14px;padding:18px 0 16px;
  background:linear-gradient(180deg,var(--cinnabar) 0%,var(--cinnabar-deep) 100%);
  color:var(--paper);
  border-right:1px solid rgba(201,154,61,.5);
}
.rail::after{
  content:"";position:absolute;inset:8px;border:1px solid rgba(239,223,184,.22);
  border-radius:6px;pointer-events:none;
}
.rail__mark{
  display:flex;flex-direction:column;align-items:center;gap:10px;
  text-decoration:none;color:var(--paper);
}
.rail__seal{
  width:40px;height:40px;display:grid;place-items:center;
  font-family:var(--serif);font-weight:900;font-size:20px;
  color:var(--gold-soft);background:rgba(20,16,14,.28);
  border:1px solid var(--gold);border-radius:6px;
}
.rail__name{
  writing-mode:vertical-rl;
  font-family:var(--serif);font-weight:900;font-size:15px;
  letter-spacing:.32em;color:var(--gold-soft);
}
.rail__nav{flex:1;display:flex;align-items:center;justify-content:center;width:100%}
.rail__list{display:flex;flex-direction:column;align-items:center;gap:2px;width:100%}
.rail__link{
  position:relative;display:inline-block;
  writing-mode:vertical-rl;
  padding:11px 7px;border-radius:4px;
  font-size:13px;letter-spacing:.2em;
  color:rgba(250,246,239,.82);text-decoration:none;
  transition:color .16s var(--ease),background-color .16s var(--ease);
}
.rail__link:hover{color:#fff;background:rgba(20,16,14,.2)}
.rail__link[aria-current="page"]{color:var(--gold-soft);font-weight:500}
.rail__link[aria-current="page"]::before{
  content:"";position:absolute;left:-13px;top:6px;bottom:6px;
  width:2px;background:var(--gold);border-radius:2px;
}
.rail__note{
  writing-mode:vertical-rl;
  font-size:11px;letter-spacing:.28em;
  color:rgba(239,223,184,.72);text-align:center;
}

/* 顶部玻璃索引条 */
.masthead{
  position:fixed;top:0;left:var(--rail-w);right:0;z-index:105;
  height:var(--masthead-h);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:0 clamp(14px,3vw,40px);
  background:var(--glass);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s var(--ease),background-color .2s var(--ease);
}
.site-head[data-scrolled="true"] .masthead{
  background:rgba(250,246,239,.9);
  box-shadow:0 6px 18px rgba(20,16,14,.12);
}
.crumb{
  display:flex;align-items:center;gap:8px;
  max-width:none;font-size:13px;letter-spacing:.06em;color:var(--clay);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.crumb__hall{color:var(--cinnabar);font-weight:500}
.crumb__sep{color:var(--gold)}
.crumb__trail{font-family:var(--serif);font-weight:900;letter-spacing:.02em;color:var(--ink)}
.masthead__actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}

/* 移动导航按钮与遮罩 */
.nav-toggle{
  display:none;
  position:fixed;top:8px;left:12px;z-index:120;
  flex-direction:column;align-items:center;justify-content:center;gap:3px;
  padding:6px 9px;border-radius:6px;cursor:pointer;
  background:rgba(250,246,239,.92);
  border:1px solid rgba(20,16,14,.18);
}
.nav-toggle__bar{
  display:block;width:20px;height:2px;border-radius:2px;
  background:var(--cinnabar);
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle__text{font-size:10px;letter-spacing:.16em;color:var(--clay);margin-top:2px}
.site-head[data-open="true"] .nav-toggle__bar:nth-child(1){transform:translateY(5px) rotate(45deg)}
.site-head[data-open="true"] .nav-toggle__bar:nth-child(2){transform:translateY(-5px) rotate(-45deg)}
.rail-scrim{
  display:none;position:fixed;inset:0;z-index:108;
  background:rgba(20,16,14,.5);opacity:0;pointer-events:none;
  transition:opacity .2s var(--ease);
}

/* ---------- 通用布局 ---------- */
.wrap{width:min(100% - 2 * var(--gutter),var(--maxw));margin-inline:auto}
.section{padding-block:clamp(36px,5.6vw,84px)}
.section--tight{padding-block:clamp(22px,3vw,44px)}
.section__head{
  display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 18px;
  margin-bottom:clamp(18px,2.6vw,32px);
}
.eyebrow{
  display:inline-block;font-size:12px;letter-spacing:.28em;
  color:var(--cinnabar);font-weight:500;
}
.lede{font-size:clamp(17px,1.7vw,20px);line-height:1.7;color:#3a332e;max-width:36em}
.prose{max-width:34em}
.prose p + p{margin-top:16px}
.prose h3{margin-top:28px;margin-bottom:10px}
.annotation{
  writing-mode:vertical-rl;
  font-size:12px;letter-spacing:.28em;color:var(--clay);text-align:center;
}
.rule{height:1px;border:0;background:linear-gradient(90deg,var(--gold),rgba(201,154,61,0))}
.grid{display:grid;gap:clamp(14px,2vw,24px)}
.grid--auto{grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}

/* ---------- 卡片与标签 ---------- */
.card{
  background:var(--paper);
  border:1px solid rgba(20,16,14,.14);
  border-radius:var(--radius);
  padding:clamp(16px,2vw,24px);
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.card:hover{
  transform:translateY(-4px);
  border-color:var(--gold);
  box-shadow:0 10px 24px rgba(122,21,18,.12);
}
.card__title{
  font-family:var(--serif);font-weight:900;font-size:20px;
  line-height:1.35;letter-spacing:0;margin-bottom:8px;color:var(--ink);
}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 10px;border-radius:999px;
  font-size:12px;letter-spacing:.06em;
  background:var(--gold-soft);color:#6a4a10;
  border:1px solid rgba(201,154,61,.55);
}
.tag--gold{background:var(--gold-soft);color:#6a4a10;border-color:rgba(201,154,61,.55)}
.tag--jade{background:var(--jade-soft);color:#14483d;border-color:rgba(31,110,94,.4)}
.tag--red{background:#f6dcd9;color:var(--cinnabar-deep);border-color:rgba(180,38,30,.35)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 18px;border-radius:var(--radius);
  border:1px solid transparent;background:none;
  font-size:14px;font-weight:500;line-height:1.3;letter-spacing:.02em;
  text-decoration:none;cursor:pointer;
  transition:transform .16s var(--ease),background-color .16s var(--ease),
    border-color .16s var(--ease),color .16s var(--ease),box-shadow .16s var(--ease);
}
.btn--primary{
  background:var(--cinnabar);color:var(--paper);
  border-color:var(--cinnabar-deep);
  box-shadow:0 2px 0 var(--cinnabar-deep);
}
.btn--primary:hover{background:var(--cinnabar-deep);transform:translateY(-1px)}
.btn--ghost{
  background:rgba(250,246,239,.6);color:var(--ink);
  border-color:rgba(20,16,14,.22);
}
.btn--ghost:hover{
  background:var(--gold-soft);color:var(--cinnabar-deep);
  border-color:var(--gold);transform:translateY(-1px);
}
.btn--gold{background:var(--gold);color:var(--ink);border-color:#a97c26}
.btn--gold:hover{background:#d8ab4f;transform:translateY(-1px)}
.btn--jade{background:var(--jade);color:var(--paper);border-color:#175349}
.btn--jade:hover{background:#175349;transform:translateY(-1px)}

/* ---------- 图片容器基础规则 ---------- */
.figure{margin:0;position:relative}
.figure__frame{
  position:relative;overflow:hidden;
  border-radius:var(--radius);
  border:1px solid rgba(180,38,30,.22);
  background:var(--gold-soft);
  aspect-ratio:4 / 3;
}
.figure__frame img,
.figure__frame svg{width:100%;height:100%;object-fit:cover}
.figure__frame--tall{aspect-ratio:3 / 4}
.figure__frame--wide{aspect-ratio:16 / 9}
.figure__frame--square{aspect-ratio:1 / 1}
.figure__caption{margin-top:10px;font-size:13px;line-height:1.6;color:var(--clay)}

/* ---------- 数据条 ---------- */
.stat-list{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));
  gap:18px;border-top:1px solid var(--line);padding-top:18px;
}
.stat-list__item{min-width:0}
.stat-list__num{
  display:block;font-family:var(--serif);font-weight:900;
  font-size:clamp(26px,3vw,38px);line-height:1.1;color:var(--cinnabar);
}
.stat-list__label{display:block;margin-top:4px;font-size:13px;letter-spacing:.05em;color:var(--clay)}

/* ---------- 页脚 ---------- */
.site-foot{
  position:relative;margin-top:clamp(48px,7vw,96px);
  background:var(--ink);color:rgba(250,246,239,.76);
}
.site-foot::before{
  content:"";display:block;height:3px;
  background:linear-gradient(90deg,var(--cinnabar),var(--gold),var(--cinnabar));
}
.site-foot__top{
  display:grid;grid-template-columns:1.05fr 2.2fr;
  gap:clamp(24px,4vw,56px);
  padding-block:clamp(36px,5vw,72px);
}
.site-foot__brand{display:flex;flex-direction:column;gap:12px}
.foot-mark{display:inline-flex;align-items:center;gap:12px;text-decoration:none;color:var(--paper)}
.foot-seal{
  width:42px;height:42px;display:grid;place-items:center;border-radius:6px;
  background:var(--cinnabar);border:1px solid var(--gold);
  font-family:var(--serif);font-weight:900;font-size:20px;color:var(--gold-soft);
}
.foot-name{font-family:var(--serif);font-weight:900;font-size:22px;letter-spacing:.08em;color:var(--paper)}
.foot-tag{font-size:13px;letter-spacing:.16em;color:var(--gold);max-width:none}
.foot-facts{font-size:13px;line-height:1.9;color:rgba(250,246,239,.6);max-width:30em}
.foot-nav{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  gap:clamp(20px,3vw,36px);
}
.foot-col__title{
  font-family:var(--serif);font-size:15px;font-weight:900;letter-spacing:.12em;
  color:var(--gold-soft);margin-bottom:12px;padding-bottom:8px;
  border-bottom:1px solid rgba(201,154,61,.4);max-width:none;
}
.foot-list{display:flex;flex-direction:column;gap:9px}
.foot-link{
  font-size:14px;color:rgba(250,246,239,.78);text-decoration:none;
  transition:color .16s var(--ease);
}
.foot-link:hover{color:var(--gold-soft);text-decoration:underline;text-underline-offset:4px}
.foot-contact__list{display:flex;flex-direction:column;gap:9px;font-size:14px;color:rgba(250,246,239,.78)}
.foot-contact__k{
  display:inline-block;min-width:4.4em;margin-right:6px;
  font-size:12px;letter-spacing:.1em;color:var(--gold);
}
.foot-note{margin-top:12px;font-size:12px;line-height:1.8;color:rgba(250,246,239,.55);max-width:32em}
.site-foot__meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 20px;
  border-top:1px solid rgba(201,154,61,.3);padding-block:18px;
}
.foot-legal{font-size:12px;letter-spacing:.04em;color:rgba(250,246,239,.55);max-width:none}
.to-top{
  margin-left:auto;padding:7px 16px;border-radius:999px;cursor:pointer;
  background:rgba(250,246,239,.08);color:var(--gold-soft);
  border:1px solid rgba(201,154,61,.55);
  font-size:12px;letter-spacing:.1em;
  transition:background-color .16s var(--ease),color .16s var(--ease);
}
.to-top:hover{background:var(--gold);color:var(--ink)}
.foot-signoff{
  padding-bottom:22px;font-size:12px;letter-spacing:.2em;
  color:rgba(239,223,184,.5);max-width:none;
}

/* ---------- 滚动显现 ---------- */
[data-reveal]{transition:opacity .24s var(--ease),transform .24s var(--ease)}
html[data-reveal-ready="true"] [data-reveal]{opacity:0;transform:translateY(12px)}
html[data-reveal-ready="true"] [data-reveal].is-in{opacity:1;transform:none}

/* ---------- 平板 ---------- */
@media (max-width:1100px){
  .site-foot__top{grid-template-columns:1fr;gap:clamp(24px,4vw,40px)}
}

/* ---------- 手机与窄屏：轨道变玻璃抽屉 ---------- */
@media (max-width:900px){
  :root{--rail-w:0px;--masthead-h:56px}
  body{padding-left:0}
  body.nav-open{overflow:hidden}

  .masthead{left:0;padding-left:64px;padding-right:14px}
  .nav-toggle{display:flex}
  .rail-scrim{display:block}
  .site-head[data-open="true"] .rail-scrim{opacity:1;pointer-events:auto}

  .rail{
    width:min(78vw,290px);height:100vh;height:100dvh;bottom:auto;
    align-items:flex-start;gap:0;padding:18px 20px 22px;
    transform:translateX(-102%);
    transition:transform .24s var(--ease);
    box-shadow:0 0 40px rgba(20,16,14,.32);
    border-right:1px solid var(--gold);
    overflow-y:auto;
  }
  .site-head[data-open="true"] .rail{transform:none}
  .rail::after{inset:6px}
  .rail__mark{flex-direction:row;align-items:center;gap:12px}
  .rail__name{writing-mode:horizontal-tb;letter-spacing:.16em;font-size:16px}
  .rail__nav{flex:initial;width:100%;margin-top:20px;justify-content:flex-start}
  .rail__list{align-items:stretch;gap:0;width:100%}
  .rail__link{
    writing-mode:horizontal-tb;display:block;width:100%;
    padding:12px 6px;border-radius:0;
    font-size:15px;letter-spacing:.06em;color:rgba(250,246,239,.86);
    border-bottom:1px dashed rgba(239,223,184,.28);
  }
  .rail__link[aria-current="page"]::before{
    left:6px;top:auto;bottom:4px;width:18px;height:2px;
  }
  .rail__note{
    writing-mode:horizontal-tb;margin-top:16px;
    font-size:11px;letter-spacing:.18em;text-align:left;
  }
  .skip-link{left:12px;top:62px}
}

@media (max-width:640px){
  .masthead__actions .btn--ghost{display:none}
  .masthead__actions .btn{padding:8px 14px;font-size:13px}
  .crumb{font-size:12px}
  .site-foot__meta{gap:8px 14px}
  .to-top{margin-left:0;width:100%}
}

/* ---------- 减弱动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  html[data-reveal-ready="true"] [data-reveal]{opacity:1;transform:none}
}