/* =========================================================
   皇冠真人会馆 · 共享样式表 /assets/site.css
   01 reset  02 tokens  03 中文排版  04 通用组件
   05 header  06 footer  07 响应式与无障碍降级
   ========================================================= */

/* ---------- 01 reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;min-height:100vh}
h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,figcaption,blockquote,dl,dt,dd{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,video{max-width:100%}
img{height:auto;display:block}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer;-webkit-appearance:none;appearance:none}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
:where(a,button,summary,select,textarea,input):focus-visible{outline:2px solid var(--gold-light);outline-offset:3px}

/* ---------- 02 tokens ---------- */
:root{
  --ink:#08090C;
  --midnight:#0E1A2B;
  --midnight-soft:#17293F;
  --line:#2C3E57;
  --gold:#B8901F;
  --gold-light:#E4C05A;
  --warm-white:#F5F1E6;
  --paper:#E9E1CE;
  --muted:#8B95A5;
  --teal:#2F6F6B;

  --rule-light:rgba(44,62,87,.22);
  --rule-mid:rgba(44,62,87,.45);
  --ink-soft:rgba(8,9,12,.72);

  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --wrap:1280px;
  --gutter:24px;
  --step:8px;

  --hdr-main:68px;
  --hdr-path:34px;
  --hdr-total:calc(var(--hdr-main) + var(--hdr-path));
}
@media (max-width:767px){:root{--gutter:16px;--hdr-main:62px;--hdr-path:32px}}

body{
  background:var(--warm-white);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  text-rendering:optimizeLegibility;
}
[id]{scroll-margin-top:calc(var(--hdr-total) + 16px)}

/* ---------- 03 中文排版 ---------- */
h1,h2,h3,h4,h5,h6{font-family:var(--serif);font-weight:700;letter-spacing:.02em;line-height:1.3}
h1{font-size:clamp(34px,5vw,64px);font-weight:900;line-height:1.16}
h2{font-size:clamp(24px,3.2vw,36px)}
h3{font-size:clamp(18px,2vw,22px);font-weight:600}
h4{font-size:18px;font-weight:600}
p{max-width:74ch}
p+p{margin-top:14px}
strong{font-weight:700}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.04em}
.visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap}

.lede{font-size:clamp(16px,1.4vw,19px);line-height:1.8;color:var(--ink-soft);max-width:70ch}
.prose{max-width:74ch;font-size:16px}
.prose h2{margin:36px 0 14px}
.prose h3{margin:26px 0 10px}
.prose p{color:rgba(8,9,12,.84)}
.prose ul,.prose ol{margin:14px 0;display:grid;gap:8px}
.prose li{padding-left:20px;position:relative}
.prose li::before{content:"";position:absolute;left:0;top:.72em;width:8px;height:1px;background:var(--gold)}
.prose ol{counter-reset:prose}
.prose ol li{counter-increment:prose}
.prose ol li::before{content:counter(prose,decimal-leading-zero);font-family:var(--mono);font-size:12px;color:var(--gold);width:auto;height:auto;background:none;top:.35em}
.link-gold{color:var(--gold);border-bottom:1px solid var(--gold);transition:color .18s ease-out,border-color .18s ease-out}
.link-gold:hover{color:var(--gold-light);border-bottom-color:var(--gold-light)}

.eyebrow,.section-index{font-family:var(--mono);font-size:12px;letter-spacing:.2em;color:var(--gold);text-transform:uppercase}
.eyebrow{display:inline-flex;align-items:center;gap:8px}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--gold)}
.section-index{display:block;margin-bottom:10px}

/* ---------- 04 通用组件 ---------- */
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 var(--gutter)}
.section{padding:64px 0;border-top:1px solid var(--rule-light)}
.section-dark{background:var(--midnight);color:var(--warm-white);border-top:1px solid var(--line)}
.section-dark .lede,.section-dark .prose p{color:rgba(245,241,230,.78)}
.section-ink{background:var(--ink);color:var(--warm-white)}

.grid{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-asym{grid-template-columns:minmax(0,7fr) minmax(0,4fr);gap:40px}

/* 框景与四角刻度 */
.frame{position:relative;border:1px solid var(--rule-mid);background:var(--paper);padding:28px}
.section-dark .frame,.section-ink .frame{background:var(--midnight-soft);border-color:var(--line)}
.frame::before,.frame::after{content:"";position:absolute;width:12px;height:12px;border:1px solid var(--gold);pointer-events:none}
.frame::before{top:-1px;left:-1px;border-right:0;border-bottom:0}
.frame::after{bottom:-1px;right:-1px;border-left:0;border-top:0}

/* 面包屑 */
.breadcrumb{border-bottom:1px solid var(--rule-light);padding:16px 0}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-family:var(--mono);font-size:12px;color:var(--muted)}
.breadcrumb-list li{display:flex;align-items:center;gap:8px}
.breadcrumb-list li+li::before{content:"/";color:var(--line)}
.breadcrumb-list a:hover{color:var(--gold)}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:var(--sans);font-size:14px;font-weight:500;line-height:1.2;padding:11px 20px;border:1px solid transparent;border-radius:0;transition:background .18s ease-out,color .18s ease-out,border-color .18s ease-out}
.btn-sm{padding:7px 12px;font-size:13px}
.btn-gold{background:var(--gold);border-color:var(--gold);color:var(--ink)}
.btn-gold:hover{background:var(--gold-light);border-color:var(--gold-light)}
.btn-outline{border-color:var(--gold);color:var(--gold);background:transparent}
.btn-outline:hover{background:var(--gold);color:var(--ink)}
.btn-dark{background:var(--ink);border-color:var(--ink);color:var(--warm-white)}
.btn-dark:hover{background:var(--midnight-soft);border-color:var(--gold);color:var(--gold-light)}

/* 标签与状态 */
.tag{display:inline-block;font-family:var(--mono);font-size:12px;letter-spacing:.08em;padding:2px 8px;background:var(--gold);color:var(--ink)}
.tag-soft{background:transparent;border:1px solid var(--gold);color:var(--gold)}
.tag-status{background:transparent;border:1px solid var(--teal);color:var(--teal)}

/* 行式清单（索引、条款、记录） */
.rows{border-top:1px solid var(--rule-light)}
.row{position:relative;display:grid;grid-template-columns:64px minmax(0,1fr) auto;gap:16px;align-items:baseline;padding:16px 12px 16px 18px;border-bottom:1px solid var(--rule-light);transition:background .18s ease-out}
.row::before{content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;background:var(--gold);transform:scaleY(0);transform-origin:center;transition:transform .18s ease-out}
.row:hover{background:var(--paper)}
.row:hover::before{transform:scaleY(1)}
.row-num{font-family:var(--mono);font-size:12px;color:var(--gold);letter-spacing:.08em}
.row-title{font-family:var(--serif);font-size:17px;font-weight:600}
.row-meta{font-family:var(--mono);font-size:12px;color:var(--muted)}

/* 对比刻度 */
.meter{display:flex;align-items:center;gap:12px;font-family:var(--mono);font-size:12px;color:var(--muted)}
.meter-label{flex:0 0 auto}
.meter-track{position:relative;flex:1 1 auto;height:8px;background:var(--paper);border:1px solid var(--rule-light)}
.meter-fill{position:absolute;left:0;top:0;bottom:0;width:var(--value,50%);background:var(--gold)}
.meter-value{flex:0 0 auto;color:var(--gold)}

/* 侧栏坐标索引 */
.index-rail{position:sticky;top:calc(var(--hdr-total) + 24px);align-self:start}
.index-rail-title{font-family:var(--mono);font-size:11px;letter-spacing:.2em;color:var(--muted);margin-bottom:10px}
.index-rail-list a{display:block;padding:8px 12px;border-left:1px solid var(--line);font-size:13px;color:var(--muted);transition:color .18s ease-out,border-color .18s ease-out,background .18s ease-out}
.index-rail-list a:hover{color:var(--ink);border-left-color:var(--gold)}
.index-rail-list a[aria-current="true"]{color:var(--ink);border-left:3px solid var(--gold);background:var(--paper)}

/* 图片容器基础规则（页面阶段放置占位或图片） */
.media-frame{position:relative;display:block;width:100%;overflow:hidden;background:var(--midnight);border:1px solid var(--line);aspect-ratio:16/9}
.media-frame[data-ratio="3:2"]{aspect-ratio:3/2}
.media-frame[data-ratio="4:3"]{aspect-ratio:4/3}
.media-frame[data-ratio="1:1"]{aspect-ratio:1/1}
.media-frame[data-ratio="21:9"]{aspect-ratio:21/9}
.media-frame>img,.media-frame>picture>img,.media-frame>svg{display:block;width:100%;height:100%;object-fit:cover}
.media-frame[data-empty="true"]{display:grid;place-items:center;background-image:repeating-linear-gradient(135deg,var(--midnight) 0 12px,var(--midnight-soft) 12px 24px)}
.media-frame[data-empty="true"]::before{content:"";width:48px;height:1.5px;background:var(--gold);box-shadow:0 -8px 0 -0.5px var(--gold-light),0 8px 0 -0.5px var(--gold-light)}
.media-frame::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(14,26,43,0) 58%,rgba(8,9,12,.5));pointer-events:none}
.media-frame figcaption{position:absolute;left:0;right:0;bottom:0;padding:12px 14px;font-family:var(--mono);font-size:12px;color:var(--warm-white);z-index:2}

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

/* ---------- 05 header ---------- */
.skip-link{position:fixed;left:16px;top:-64px;z-index:200;background:var(--gold);color:var(--ink);font-family:var(--mono);font-size:13px;padding:10px 16px;transition:top .18s ease-out}
.skip-link:focus{top:12px}

.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--midnight);
  color:var(--warm-white);
  border-bottom:1px solid var(--line);
  font-size:14px;
}
.header-inner{
  position:relative;
  display:flex;align-items:stretch;
  width:100%;max-width:var(--wrap);margin:0 auto;padding:0 var(--gutter);
  min-height:var(--hdr-main);
  transition:min-height .2s ease-out;
}
.site-header[data-compact="true"] .header-inner{min-height:56px}
.header-inner::before{
  content:"";flex:0 0 12px;width:12px;margin-right:14px;
  background-image:repeating-linear-gradient(180deg,var(--line) 0 1px,transparent 1px 8px);
  border-right:1px solid var(--line);
  opacity:.9;pointer-events:none;
}

.read-progress{position:absolute;left:0;right:0;top:0;height:2px;background:rgba(44,62,87,.6);z-index:3}
.read-progress-fill{display:block;height:100%;width:100%;background:var(--gold-light);transform:scaleX(var(--progress,0));transform-origin:left center}

.brand{display:flex;align-items:center;gap:12px;min-width:180px;padding:0 20px 0 16px;border-right:1px solid var(--line)}
.brand-crown{color:var(--gold-light);display:flex;flex:0 0 auto}
.brand-text{display:block;min-width:0}
.brand-name{display:block;font-family:var(--serif);font-size:17px;font-weight:700;letter-spacing:.06em;line-height:1.25;color:var(--warm-white);white-space:nowrap}
.brand-sub{display:block;font-family:var(--mono);font-size:10px;letter-spacing:.2em;color:var(--muted);text-transform:uppercase}
.brand:hover .brand-name{color:var(--gold-light)}

.site-nav{flex:1 1 auto;display:flex;align-items:stretch;min-width:0}
.nav-list{display:flex;align-items:stretch;width:100%}
.nav-item{flex:1 1 0;display:flex;min-width:0}
.nav-link{position:relative;display:flex;flex-direction:column;justify-content:center;gap:2px;width:100%;padding:10px 12px;border-right:1px solid var(--line);color:rgba(245,241,230,.86);transition:background .18s ease-out,color .18s ease-out}
.nav-item:first-child .nav-link{border-left:1px solid var(--line)}
.nav-index{font-family:var(--mono);font-size:10px;letter-spacing:.16em;color:var(--muted);transition:color .18s ease-out}
.nav-label{font-size:13px;line-height:1.3}
.nav-link:hover{background:var(--midnight-soft);color:var(--warm-white)}
.nav-link:hover .nav-index{color:var(--gold-light)}
.nav-link[aria-current="page"]{background:var(--midnight-soft);color:var(--warm-white)}
.nav-link[aria-current="page"]::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--gold)}
.nav-link[aria-current="page"] .nav-index{color:var(--gold-light)}

.header-utility{display:flex;align-items:center;gap:10px;padding-left:14px;border-left:1px solid var(--line);flex:0 0 auto}
.mail-copy{position:relative;display:flex;align-items:center}
.mail-btn{font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--muted);border:1px solid var(--line);padding:5px 9px;transition:color .18s ease-out,border-color .18s ease-out}
.mail-btn:hover{color:var(--gold-light);border-color:var(--gold)}
.mail-status{
  position:absolute;left:0;top:calc(100% + 6px);z-index:6;
  font-family:var(--mono);font-size:11px;white-space:nowrap;
  background:var(--ink);color:var(--gold-light);border:1px solid var(--line);padding:3px 7px;
  opacity:0;pointer-events:none;transition:opacity .18s ease-out;
}
.mail-status[data-visible="true"]{opacity:1}

.nav-toggle{display:none;align-items:center;gap:9px;padding:0 14px;border-left:1px solid var(--line);color:var(--warm-white);font-size:13px;flex:0 0 auto}
.nav-toggle-bars{position:relative;display:block;width:18px;height:2px;background:var(--gold-light);transition:background .18s ease-out}
.nav-toggle-bars::before,.nav-toggle-bars::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--gold-light);transition:transform .18s ease-out}
.nav-toggle-bars::before{top:-6px}
.nav-toggle-bars::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{transform:translateY(-6px) rotate(-45deg)}

.path-strip{position:relative;background:var(--midnight-soft);border-top:1px solid var(--line);min-height:var(--hdr-path)}
.path-strip-inner{display:flex;align-items:center;gap:14px;width:100%;max-width:var(--wrap);margin:0 auto;padding:0 var(--gutter);min-height:var(--hdr-path);overflow-x:auto;scrollbar-width:none}
.path-strip-inner::-webkit-scrollbar{display:none}
.path-strip::after{content:"";position:absolute;left:0;right:0;bottom:0;height:4px;background-image:linear-gradient(90deg,var(--line) 0 1px,transparent 1px);background-size:24px 100%;pointer-events:none}
.path-strip-title{flex:0 0 auto;font-family:var(--mono);font-size:10px;letter-spacing:.2em;color:var(--muted);padding-right:12px;border-right:1px solid var(--line)}
.path-list{display:flex;align-items:center;gap:8px;flex:0 0 auto}
.path-node{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:rgba(245,241,230,.9);padding:4px 8px;border:1px solid transparent;transition:color .18s ease-out,border-color .18s ease-out}
.path-node:hover{color:var(--gold-light);border-color:var(--gold)}
.path-num{font-family:var(--mono);font-size:10px;color:var(--gold)}
.path-node[aria-current="page"]{color:var(--gold-light);border-color:var(--line);background:rgba(184,144,31,.12)}
.path-arrow{color:var(--line);font-family:var(--mono);font-size:12px}

/* ---------- 06 footer ---------- */
.site-footer{background:var(--ink);color:var(--warm-white);font-size:14px;border-top:3px solid var(--gold)}
.footer-inner{width:100%;max-width:var(--wrap);margin:0 auto;padding:48px var(--gutter) 24px}
.footer-grid{display:grid;grid-template-columns:1.15fr .9fr .95fr 1.4fr;border-top:1px solid var(--line);border-left:1px solid var(--line)}
.footer-col{padding:24px 20px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);min-width:0}
.footer-title{font-family:var(--mono);font-size:11px;font-weight:400;letter-spacing:.2em;color:var(--gold-light);margin-bottom:14px}
.footer-brand{font-family:var(--serif);font-size:17px;font-weight:700;letter-spacing:.04em;margin-bottom:10px}
.footer-note{font-size:13px;line-height:1.75;color:var(--muted);max-width:none}
.footer-note-inline{flex:1 1 260px;text-align:right;margin:0}
.footer-links li+li{margin-top:9px}
.footer-links a{font-size:13.5px;color:rgba(245,241,230,.82);border-bottom:1px solid transparent;transition:color .18s ease-out,border-color .18s ease-out}
.footer-links a:hover{color:var(--gold-light);border-bottom-color:var(--gold)}
.footer-contact li{position:relative;display:flex;gap:10px;font-size:13px;line-height:1.7;color:rgba(245,241,230,.82)}
.footer-contact li+li{margin-top:9px}
.footer-key{flex:0 0 44px;font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--gold);padding-top:3px}
.link-btn{font-family:var(--mono);font-size:12.5px;color:var(--gold-light);border-bottom:1px dashed var(--line);text-align:left;word-break:break-all;transition:color .18s ease-out,border-color .18s ease-out}
.link-btn:hover{color:var(--warm-white);border-bottom-color:var(--gold)}
.footer-bottom{display:flex;flex-wrap:wrap;align-items:center;gap:12px 28px;justify-content:space-between;margin-top:22px;padding-top:20px;border-top:1px solid var(--line)}
.footer-legal,.footer-copy{font-family:var(--mono);font-size:12px;color:var(--muted);letter-spacing:.04em;max-width:none}

/* ---------- 07 响应式 ---------- */
@media (max-width:1080px){
  .nav-toggle{display:flex}
  .header-utility .utility-cta{display:none}
  .header-inner{position:static}
  .brand{min-width:0;flex:1 1 auto;border-right:0}
  .site-nav{
    position:absolute;top:100%;left:0;right:0;z-index:5;display:block;
    background:var(--midnight);border-top:1px solid var(--gold);border-bottom:1px solid var(--line);
    max-height:calc(100vh - var(--hdr-total));overflow-y:auto;
    opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity .2s ease-out,transform .2s ease-out,visibility .2s;
  }
  .site-nav[data-open="true"]{opacity:1;visibility:visible;transform:translateY(0)}
  .nav-list{display:block}
  .nav-item{display:block}
  .nav-link{flex-direction:row;align-items:center;gap:14px;padding:14px 20px;border-right:0;border-bottom:1px solid var(--line)}
  .nav-item:first-child .nav-link{border-left:0}
  .nav-link[aria-current="page"]::before{top:0;bottom:0;width:3px}
  .nav-label{font-size:15px}
  .nav-index{font-size:11px}
}

@media (max-width:900px){
  .grid-2,.grid-3,.grid-asym{grid-template-columns:minmax(0,1fr)}
  .grid-asym{gap:28px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-note-inline{text-align:left}
  .index-rail{position:static}
}

@media (max-width:767px){
  .section{padding:48px 0}
  .row{grid-template-columns:52px minmax(0,1fr);row-gap:4px}
  .row-meta{grid-column:2}
  .frame{padding:20px}
}

@media (max-width:560px){
  .footer-grid{grid-template-columns:1fr}
  .header-inner::before{flex-basis:8px;width:8px;margin-right:10px}
  .brand-name{font-size:15.5px}
  .brand-sub{display:none}
  .nav-toggle-text{display:none}
  .footer-inner{padding:36px var(--gutter) 20px}
}

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