/* ============================================================
   皇冠彩讯 · 共享样式表 /assets/site.css
   纸本档案气质：浅米白纸面 + 日历网格 + 堆叠面板 + 金墨双色
   ============================================================ */

/* ---------- 0. 设计令牌 ---------- */
:root{
  --gold:#C9A227;
  --deep:#0E3B2E;
  --red:#C0392B;
  --paper:#F7F3E9;
  --white:#FFFDF7;
  --sand:#E7DFC9;
  --ink:#1C1C1C;
  --muted:#6B7A72;
  --mid:#2F6B57;
  --pale:#F0E6C8;

  --font-head:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",-apple-system,"Segoe UI",sans-serif;
  --font-body:var(--font-head);
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono","Courier New",monospace;

  --shell:1180px;
  --gutter:24px;
  --r:2px;
  --shadow-layer:4px 6px 0 rgba(14,59,46,.07);
  --ease:cubic-bezier(.2,.7,.3,1);
}

/* ---------- 1. reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background-color:var(--paper);
  background-image:
    linear-gradient(to right,rgba(14,59,46,.045) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(14,59,46,.045) 1px,transparent 1px);
  background-size:64px 64px;
  background-attachment:fixed;
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16.5px;
  line-height:1.85;
  letter-spacing:.01em;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0}
ul,ol{list-style:none;margin:0;padding:0}
img{max-width:100%;height:auto;display:block}
svg{display:block}
a{color:var(--deep);text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
hr{border:0;border-top:1px solid var(--sand);margin:32px 0}
table{border-collapse:collapse}
:focus-visible{outline:2px solid var(--red);outline-offset:3px}

/* ---------- 2. 版心与排版骨架 ---------- */
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 var(--gutter)}
.num,.rule-num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
  letter-spacing:.02em;
}
.num{color:inherit}
.rule-num{color:var(--red);font-weight:700}
.fig{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:clamp(46px,9vw,96px);
  line-height:1;
  font-weight:700;
  letter-spacing:-.02em;
  color:var(--deep);
  display:block;
}
.fig--red{color:var(--red)}
#main-content{display:block;scroll-margin-top:88px}

.section{padding:72px 0}
.section--tight{padding:44px 0}
.section--white{background:var(--white)}
.section--ink{background:var(--deep);color:var(--pale)}
.section--ink .section-head__title,
.section--ink .panel__title{color:var(--pale)}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:20px;flex-wrap:wrap;margin-bottom:32px;
}
.section-head__title{
  font-family:var(--font-head);
  font-size:clamp(26px,3.4vw,38px);
  line-height:1.28;font-weight:700;letter-spacing:.01em;color:var(--deep);
}
.section-head__note{font-size:13.5px;color:var(--muted);letter-spacing:.06em;max-width:36ch}

/* 栅格 */
.grid{display:grid;gap:24px}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid--split{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:32px;align-items:start}
.stack>*+*{margin-top:20px}

/* ---------- 3. 跳链 ---------- */
.skip-link{
  position:absolute;left:14px;top:-70px;z-index:220;
  background:var(--deep);color:var(--pale);
  padding:11px 20px;font-size:13px;letter-spacing:.14em;
  border:1px solid var(--gold);border-radius:var(--r);
  transition:top .22s var(--ease);
}
.skip-link:focus{top:14px}

/* ---------- 4. 页头 ---------- */
.site-header{position:relative;z-index:70}

/* 4.1 品牌条 */
.masthead{
  background:var(--deep);color:var(--pale);
  box-shadow:inset 0 -1px 0 rgba(201,162,39,.55);
  max-height:150px;overflow:hidden;
  transition:max-height .34s var(--ease),opacity .24s var(--ease);
}
.site-header[data-condensed] .masthead{max-height:0;opacity:0}
.masthead__inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px 28px;flex-wrap:wrap;padding:13px 0;min-height:58px;
}
.brand{display:flex;align-items:center;gap:12px;color:inherit}
.brand__crown{width:26px;height:22px;color:var(--gold);flex:none}
.brand__name{
  font-family:var(--font-head);font-weight:700;font-size:19px;
  letter-spacing:.16em;color:#fff;
}
.brand__tagline{
  font-size:12px;letter-spacing:.2em;color:rgba(240,230,200,.72);
  padding-left:13px;border-left:1px solid rgba(201,162,39,.45);
}
.masthead__note{
  display:flex;align-items:center;gap:9px;
  font-size:12px;letter-spacing:.1em;color:rgba(240,230,200,.82);
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
}
.pulse-dot{
  width:7px;height:7px;border-radius:50%;background:var(--gold);flex:none;
  box-shadow:0 0 0 0 rgba(201,162,39,.55);
  animation:crown-pulse 2.6s var(--ease) infinite;
}
@keyframes crown-pulse{
  0%{box-shadow:0 0 0 0 rgba(201,162,39,.55)}
  70%{box-shadow:0 0 0 8px rgba(201,162,39,0)}
  100%{box-shadow:0 0 0 0 rgba(201,162,39,0)}
}

/* 4.2 栏目条 */
.ledger-nav{
  position:sticky;top:0;
  background:var(--white);
  box-shadow:inset 0 -1px 0 var(--sand);
}
.ledger-nav__inner{
  display:flex;align-items:center;gap:18px;
  min-height:56px;transition:min-height .28s var(--ease);
}
.ledger-nav__list{display:flex;flex:1 1 auto;align-items:center;gap:4px;min-width:0}
.ledger-nav__link{
  position:relative;display:block;
  padding:9px 12px;
  font-size:14.5px;font-weight:600;letter-spacing:.1em;color:var(--deep);
  white-space:nowrap;
  transition:color .22s var(--ease),font-size .28s var(--ease),padding .28s var(--ease);
}
.ledger-nav__link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:3px;height:2px;
  background:var(--gold);transform:scaleX(0);transform-origin:left center;
  transition:transform .28s var(--ease),background .22s var(--ease);
}
.ledger-nav__link:hover{color:var(--mid)}
.ledger-nav__link:hover::after,
.ledger-nav__link:focus-visible::after{transform:scaleX(1)}
.ledger-nav__link[aria-current="page"]{color:var(--ink)}
.ledger-nav__link[aria-current="page"]::after{transform:scaleX(1);background:var(--red)}
.ledger-nav__cta{
  flex:none;
  font-size:13.5px;font-weight:600;letter-spacing:.1em;
  padding:9px 18px;border-radius:var(--r);
  border:1px solid var(--gold);background:var(--pale);color:var(--deep);
  text-decoration:none;white-space:nowrap;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.ledger-nav__cta:hover{background:var(--deep);border-color:var(--deep);color:var(--pale)}
.ledger-nav__progress{
  position:absolute;left:0;bottom:0;width:100%;height:2px;
  background:linear-gradient(90deg,var(--gold),var(--red));
  transform:scaleX(0);transform-origin:left center;
  transition:transform .12s linear;
}
.site-header[data-condensed] .ledger-nav__inner{min-height:48px}
.site-header[data-condensed] .ledger-nav__link{font-size:13.5px;padding:6px 12px}

/* 4.3 移动开关 */
.nav-toggle{
  display:none;align-items:center;gap:10px;flex:none;
  background:var(--deep);color:var(--pale);
  border:1px solid var(--deep);border-radius:var(--r);
  padding:9px 15px;
}
.nav-toggle__bars{position:relative;display:block;width:16px;height:12px}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";position:absolute;left:0;right:0;height:1.5px;background:var(--gold);
  transition:transform .24s var(--ease);
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{bottom:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-5px) rotate(-45deg)}
.nav-toggle__text{font-size:12.5px;letter-spacing:.2em}

/* ---------- 5. 页脚 ---------- */
.site-footer{
  background:var(--deep);color:rgba(247,243,233,.82);
  box-shadow:inset 0 3px 0 var(--gold);
  margin-top:80px;
}
.footer-ledger{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;
  gap:36px;padding:58px 0 44px;
}
.footer-col__title{
  font-family:var(--font-head);
  font-size:12px;font-weight:700;letter-spacing:.26em;
  color:var(--gold);
  padding-bottom:9px;margin-bottom:16px;
  box-shadow:inset 0 -1px 0 rgba(201,162,39,.3);
}
.footer-brand{display:inline-flex;align-items:center;gap:11px}
.footer-brand__crown{width:24px;height:20px;color:var(--gold);flex:none}
.footer-brand__name{
  font-family:var(--font-head);font-size:20px;font-weight:700;
  letter-spacing:.16em;color:#fff;
}
.footer-brand__desc{
  margin-top:12px;font-size:13px;line-height:1.8;
  color:rgba(247,243,233,.6);max-width:26em;
}
.footer-list li{margin-bottom:9px}
.footer-list a{
  font-size:13.5px;letter-spacing:.04em;
  color:rgba(247,243,233,.78);
  box-shadow:inset 0 -1px 0 transparent;
  transition:color .2s var(--ease),box-shadow .2s var(--ease);
}
.footer-list a:hover{color:var(--pale);box-shadow:inset 0 -1px 0 var(--gold)}
.footer-list--plain li{
  display:flex;gap:10px;align-items:baseline;
  font-size:13px;line-height:1.7;margin-bottom:11px;
}
.footer-list__key{
  flex:none;font-size:11px;letter-spacing:.16em;color:var(--gold);
  min-width:2.6em;
}
.footer-list__val{color:rgba(247,243,233,.74);word-break:break-word}
.footer-base{
  box-shadow:inset 0 1px 0 rgba(201,162,39,.24);
  padding:18px 0 22px;
}
.footer-base__inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:14px 28px;flex-wrap:wrap;
}
.footer-base__copy{
  font-size:12.5px;letter-spacing:.08em;color:rgba(247,243,233,.6);
}
.footer-base__nav{display:flex;flex-wrap:wrap;gap:6px 20px}
.footer-base__nav a{
  font-size:12.5px;letter-spacing:.1em;color:rgba(247,243,233,.68);
  transition:color .2s var(--ease);
}
.footer-base__nav a:hover{color:var(--gold)}

/* ---------- 6. 通用组件 ---------- */
/* 6.1 标签与注释 */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:11.5px;letter-spacing:.28em;color:var(--muted);
}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--gold);flex:none}
.vlabel{
  display:inline-block;
  writing-mode:vertical-rl;
  font-size:11.5px;letter-spacing:.34em;line-height:1;
  color:var(--deep);background:var(--pale);
  border:1px solid var(--gold);border-radius:var(--r);
  padding:12px 6px;white-space:nowrap;
}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:11.5px;letter-spacing:.16em;
  padding:3px 9px;border-radius:1px;
  border:1px solid var(--gold);color:var(--deep);
  background:rgba(240,230,200,.55);
  white-space:nowrap;
}
.tag--red{border-color:var(--red);color:var(--red);background:rgba(192,57,43,.07)}
.tag--solid{background:var(--deep);border-color:var(--deep);color:var(--pale)}

/* 6.2 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  font-size:14px;font-weight:600;letter-spacing:.12em;
  padding:12px 24px;border-radius:var(--r);
  border:1px solid var(--deep);background:var(--white);color:var(--deep);
  transition:background .22s var(--ease),color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.btn:hover{
  background:var(--deep);color:var(--pale);
  transform:translateY(-1px);
  box-shadow:3px 4px 0 rgba(14,59,46,.16);
}
.btn--gold{background:var(--gold);border-color:var(--gold);color:#241d03}
.btn--gold:hover{background:var(--deep);border-color:var(--deep);color:var(--pale)}
.btn--line{background:transparent}
.btn--sm{padding:8px 16px;font-size:12.5px}

/* 6.3 面包屑 */
.crumbs{font-size:12.5px;letter-spacing:.1em;color:var(--muted)}
.crumbs>ol,.crumbs>ul{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumbs li{display:flex;align-items:center;gap:8px}
.crumbs li+li::before{content:"/";color:var(--sand)}
.crumbs a{color:var(--muted);box-shadow:inset 0 -1px 0 var(--sand)}
.crumbs a:hover{color:var(--deep);box-shadow:inset 0 -1px 0 var(--gold)}

/* 6.4 堆叠面板 */
.panel{
  position:relative;
  background:var(--white);
  border:1px solid var(--sand);
  border-top:3px solid var(--deep);
  border-radius:var(--r);
  box-shadow:var(--shadow-layer);
  padding:32px 28px 28px;
}
.panel--gold{border-top-color:var(--gold)}
.panel--flat{box-shadow:none}
.panel__tag{
  position:absolute;top:0;right:20px;
  background:var(--deep);color:var(--pale);
  font-size:11.5px;letter-spacing:.2em;
  padding:5px 12px;border-radius:0 0 var(--r) var(--r);
  white-space:nowrap;
}
.panel__tag--gold{background:var(--gold);color:var(--deep)}
.panel__head{display:flex;align-items:flex-start;gap:16px;margin-bottom:18px}
.panel__title{
  font-family:var(--font-head);
  font-size:22px;line-height:1.45;font-weight:700;letter-spacing:.02em;
  color:var(--deep);
}

/* 6.5 正文容器 */
.prose{max-width:74ch;font-size:16.5px;color:#2b2b2b}
.prose p{margin-bottom:20px}
.prose p:last-child{margin-bottom:0}
.prose h2{
  font-family:var(--font-head);font-size:26px;line-height:1.5;font-weight:700;
  color:var(--deep);margin:40px 0 14px;
}
.prose h3{
  font-family:var(--font-head);font-size:19px;line-height:1.55;font-weight:700;
  color:var(--deep);margin:28px 0 10px;
}
.prose ul,.prose ol{padding-left:1.5em;margin-bottom:20px}
.prose ul{list-style:disc}
.prose ol{list-style:decimal}
.prose li{margin-bottom:8px}
.prose a{color:var(--mid);box-shadow:inset 0 -1px 0 rgba(47,107,87,.45)}
.prose a:hover{color:var(--red);box-shadow:inset 0 -1px 0 var(--red)}
.prose strong{font-weight:700;color:var(--ink)}
.prose table{width:100%;margin:20px 0;font-size:15px}
.prose th,.prose td{border:1px solid var(--sand);padding:10px 12px;text-align:left}
.prose th{background:var(--pale);font-weight:700;color:var(--deep)}
.prose blockquote{
  margin:24px 0;padding:14px 20px;
  border-left:3px solid var(--gold);
  background:rgba(240,230,200,.45);color:#3a3a3a;
}
.prose code{
  font-family:var(--font-mono);font-size:.9em;
  background:var(--pale);padding:1px 5px;border-radius:2px;
}

/* 6.6 索引表 */
.index-table{width:100%;font-size:14.5px}
.index-table th{
  font-size:12px;font-weight:700;letter-spacing:.14em;
  color:var(--deep);text-align:left;white-space:nowrap;
  padding:10px 12px;background:var(--pale);
  box-shadow:inset 0 -2px 0 var(--deep);
}
.index-table td{
  padding:11px 12px;
  box-shadow:inset 0 -1px 0 var(--sand);
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
}
.index-table tbody tr:nth-child(even) td{background:rgba(231,223,201,.35)}
.index-table tbody tr.is-hit td,
.index-table tbody tr[data-highlight] td{
  background:var(--pale);
  box-shadow:inset 0 -1px 0 var(--sand),inset 3px 0 0 var(--red);
}

/* 6.7 时间轴刻度 */
.rail{position:relative;padding-top:26px}
.rail::before{
  content:"";position:absolute;left:0;right:0;top:11px;height:1px;
  background:linear-gradient(to right,var(--gold),rgba(201,162,39,.16));
}
.rail__node{position:relative}
.rail__node::before{
  content:"";position:absolute;top:-21px;left:0;
  width:9px;height:9px;border-radius:50%;
  background:var(--paper);border:2px solid var(--gold);
  transition:background .3s var(--ease),border-color .3s var(--ease),transform .3s var(--ease);
}
.rail__node.is-on::before{background:var(--red);border-color:var(--red);transform:scale(1.18)}

/* 6.8 图片容器 */
.frame{
  background:var(--white);
  border:1px solid var(--sand);
  border-radius:var(--r);
  box-shadow:var(--shadow-layer);
  padding:10px;
}
.frame--plain{padding:0;box-shadow:none;background:transparent;border:0}
.frame__slot{
  position:relative;overflow:hidden;
  display:grid;place-items:center;
  background:var(--pale);
  border:1px solid rgba(201,162,39,.45);
}
.frame__slot::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(14,59,46,.07) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(14,59,46,.07) 1px,transparent 1px);
  background-size:28px 28px;
}
.frame__slot>*{position:relative;z-index:1}
.frame__slot img{width:100%;height:100%;object-fit:cover}
.frame__cap{margin-top:10px;font-size:12px;letter-spacing:.08em;color:var(--muted)}
.frame--16x9 .frame__slot{aspect-ratio:16/9}
.frame--4x3 .frame__slot{aspect-ratio:4/3}
.frame--1x1 .frame__slot{aspect-ratio:1/1}
.frame--21x9 .frame__slot{aspect-ratio:21/9}

/* 6.9 进入视口显现 */
html.has-js [data-reveal]{
  opacity:0;transform:translateY(18px);
  transition:opacity .6s var(--ease),transform .6s var(--ease);
}
html.has-js [data-reveal].is-in{opacity:1;transform:none}

/* 6.10 返回顶部 */
.to-top{
  position:fixed;right:22px;bottom:22px;z-index:130;
  width:52px;height:52px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--deep);color:var(--pale);
  border:1px solid var(--gold);
  font-family:var(--font-mono);font-size:18px;line-height:1;
  box-shadow:0 10px 22px rgba(14,59,46,.3);
  opacity:0;visibility:hidden;transform:translateY(14px);
  transition:opacity .28s var(--ease),transform .28s var(--ease),visibility .28s linear;
}
.to-top[data-visible]{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--gold);color:var(--deep);border-color:var(--gold)}

/* ---------- 7. 响应式 ---------- */
@media (max-width:1024px){
  .footer-ledger{grid-template-columns:1.4fr 1fr 1fr;gap:30px}
  .footer-col--brand{grid-column:1 / -1}
  .footer-brand__desc{max-width:40em}
}
@media (max-width:960px){
  .grid--3,.grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--split{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:900px){
  body{background-attachment:scroll}
  .section{padding:54px 0}
  .masthead__inner{padding:11px 0;min-height:52px}
  .brand__name{font-size:17px}
  .brand__tagline{
    border:0;padding-left:0;font-size:11px;letter-spacing:.14em;
    color:rgba(240,230,200,.6);
  }
  .masthead__note{width:100%}
  .ledger-nav__inner{flex-wrap:wrap;gap:10px;padding:9px 0}
  .nav-toggle{display:inline-flex}
  .ledger-nav__list{
    display:none;
    flex:none;order:3;width:100%;
    flex-direction:column;align-items:stretch;gap:0;
    margin-top:8px;padding-top:6px;
    box-shadow:inset 0 1px 0 var(--sand);
  }
  .ledger-nav[data-open] .ledger-nav__list{display:flex}
  .ledger-nav__link{
    padding:13px 4px;font-size:15px;
    box-shadow:inset 0 -1px 0 var(--sand);
  }
  .ledger-nav__link::after{display:none}
  .ledger-nav__cta{margin-left:auto;padding:8px 14px;font-size:12.5px}
  .site-header[data-condensed] .ledger-nav__link{font-size:15px;padding:13px 4px}
  .panel{padding:28px 20px 24px}
  .to-top{right:16px;bottom:16px;width:46px;height:46px}
}
@media (max-width:640px){
  :root{--gutter:18px}
  .grid--2,.grid--3,.grid--4{grid-template-columns:minmax(0,1fr)}
  .footer-ledger{grid-template-columns:minmax(0,1fr);gap:26px;padding:42px 0 30px}
  .footer-base__inner{flex-direction:column;align-items:flex-start}
  .footer-list--plain li{flex-direction:column;gap:2px}
  .section-head{margin-bottom:24px}
}

/* ---------- 8. 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;
  }
  html.has-js [data-reveal]{opacity:1;transform:none}
  .ledger-nav__progress{transition:none}
}