/* ============================================================
   皇官方版口中心 · /assets/site.css
   共享外壳：重置 / 令牌 / 中文排版 / 命令栏页头 / 暖纸页脚 / 通用组件
   ============================================================ */

/* ---------- 1. 重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:104px;
}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,figcaption,blockquote,dl,dd,hr{margin:0}
ul,ol{padding:0;list-style:none}
hr{border:0}
img,svg,video,canvas{display:block;max-width:100%}
img{height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}
table{border-collapse:collapse;border-spacing:0;width:100%}

/* ---------- 2. 设计令牌 ---------- */
:root{
  /* 墨与纸 */
  --ink:#0B0B0D;
  --ink-2:#151517;
  --ink-3:#1E1E23;
  --paper:#F2EAD9;
  --paper-2:#E6DAC3;

  /* 印刷色 */
  --gold:#C8A455;
  --gold-lt:#E8CE8C;
  --cinnabar:#B7332B;
  --cinnabar-lt:#CE3C33;
  --jade:#4E7F76;
  --jade-d:#35635B;
  --mist:#8C8578;
  --mist-dark:#5B554C;

  /* 字体 */
  --font-serif:"Source Han Serif SC","Noto Serif CJK SC","Songti SC","STSong","SimSun",Georgia,serif;
  --font-sans:"Source Han Sans SC","Noto Sans CJK SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular","Menlo","Consolas","Liberation Mono",monospace;

  /* 尺度 */
  --shell:1320px;
  --shell-narrow:900px;
  --gutter:clamp(16px,4vw,48px);
  --dur:.28s;
  --dur-slow:.4s;
  --ease:cubic-bezier(.22,.61,.36,1);
}

:focus-visible{outline:2px solid var(--gold-lt);outline-offset:3px;border-radius:1px}

.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

.skip-link{
  position:fixed;
  top:0;left:0;
  z-index:200;
  transform:translateY(-140%);
  background:var(--gold);
  color:var(--ink);
  padding:13px 22px;
  font-size:14px;
  font-weight:600;
  letter-spacing:.06em;
  border-radius:0 0 2px 0;
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 3. 基础排版 ---------- */
body{
  font-family:var(--font-sans);
  font-size:clamp(16px,0.4vw + 14.6px,17.5px);
  line-height:1.8;
  background:var(--ink);
  color:var(--paper);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}

h1,h2,h3,h4{font-family:var(--font-serif);font-weight:900;line-height:1.26;letter-spacing:.005em}
h1{font-size:clamp(28px,4.2vw,56px);line-height:1.14;letter-spacing:-.012em}
h2{font-size:clamp(22px,2.4vw,34px);line-height:1.24}
h3{font-size:clamp(18px,1.3vw,23px)}
h4{font-size:clamp(16px,0.9vw,18px);letter-spacing:.02em}

/* ---------- 4. 通用容器与分区 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.shell--narrow{max-width:var(--shell-narrow)}

.band{
  position:relative;
  padding-block:clamp(56px,7.6vw,112px);
  padding-inline:var(--gutter);
}
.band--ink{background:var(--ink);color:var(--paper)}
.band--deep{background:var(--ink-2);color:var(--paper)}
.band--paper{background:var(--paper);color:var(--ink)}
.band--paper-2{background:var(--paper-2);color:var(--ink)}
.band--jade{background:var(--jade-d);color:var(--paper)}

/* ---------- 5. 网格 ---------- */
.grid{
  display:grid;
  gap:var(--gap,clamp(18px,2.4vw,36px));
  grid-template-columns:repeat(12,minmax(0,1fr));
}
.grid > *{grid-column:1 / -1;min-width:0}

@media (min-width:820px){
  .c-3{grid-column:span 3}
  .c-4{grid-column:span 4}
  .c-5{grid-column:span 5}
  .c-6{grid-column:span 6}
  .c-7{grid-column:span 7}
  .c-8{grid-column:span 8}
  .c-9{grid-column:span 9}
  .c-12{grid-column:span 12}
  .c-shift-3{grid-column-start:3}
  .c-shift-4{grid-column-start:4}
}

/* ---------- 6. 正文容器 ---------- */
.prose{
  max-width:38em;
  font-size:clamp(16px,0.35vw + 15px,17.5px);
  line-height:1.85;
  color:inherit;
}
.prose > * + *{margin-top:1.05em}
.prose h2{margin-top:2.2em;margin-bottom:.5em}
.prose h3{margin-top:1.8em;margin-bottom:.4em}
.prose ul,.prose ol{padding-left:1.25em}
.prose li{list-style:disc;margin-top:.45em}
.prose ol li{list-style:decimal}
.prose a{border-bottom:1px solid var(--gold);padding-bottom:1px}
.prose a:hover{color:var(--gold-lt);border-bottom-color:var(--gold-lt)}
.band--paper .prose a:hover,
.band--paper-2 .prose a:hover{color:var(--cinnabar);border-bottom-color:var(--cinnabar)}
.prose strong{font-weight:600}
.prose blockquote{
  border-left:2px solid var(--gold);
  padding-left:18px;
  font-family:var(--font-serif);
  font-size:1.05em;
}

/* ---------- 7. 眉标、分隔线、标签 ---------- */
.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(--gold);
}
.eyebrow::before{content:"";width:22px;height:1px;background:currentColor;flex:0 0 auto}
.band--paper .eyebrow,
.band--paper-2 .eyebrow{color:var(--jade-d)}

.rule{height:1px;background:linear-gradient(90deg,var(--gold),rgba(200,164,85,0));border:0}
.rule--paper{background:linear-gradient(90deg,rgba(11,11,13,.32),rgba(11,11,13,0))}

.tag{
  display:inline-flex;
  align-items:center;
  gap:.42em;
  padding:4px 10px;
  border:1px solid currentColor;
  border-radius:2px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--jade-d);
  line-height:1.5;
}
.tag--gold{color:var(--gold)}
.tag--cinnabar{color:var(--cinnabar)}
.tag--jade{color:var(--jade-d)}

.coord{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--mist);
}
.band--paper .coord,
.band--paper-2 .coord{color:var(--mist-dark)}

/* ---------- 8. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.6em;
  padding:12px 22px;
  border:1px solid var(--gold);
  border-radius:2px;
  font-size:15px;
  letter-spacing:.06em;
  color:var(--gold-lt);
  background:transparent;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.btn:hover{background:var(--gold);color:var(--ink);border-color:var(--gold)}
.btn--solid{background:var(--gold);color:var(--ink);border-color:var(--gold)}
.btn--solid:hover{background:var(--gold-lt);border-color:var(--gold-lt);color:var(--ink)}
.btn--cinnabar{background:var(--cinnabar);border-color:var(--cinnabar);color:#FFF3EC}
.btn--cinnabar:hover{background:var(--cinnabar-lt);border-color:var(--cinnabar-lt);color:#FFF3EC}
.btn--ghost{border-color:currentColor;color:inherit;opacity:.92}
.btn--ghost:hover{background:currentColor;border-color:currentColor}
.band--paper .btn--ghost:hover,
.band--paper-2 .btn--ghost:hover{color:var(--paper)}

/* ---------- 9. 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--mist-dark);
}
.breadcrumb--dark{color:var(--mist)}
.breadcrumb a{transition:color var(--dur) var(--ease)}
.breadcrumb a:hover{color:var(--cinnabar)}
.breadcrumb--dark a:hover{color:var(--gold-lt)}
.breadcrumb__sep{color:var(--gold)}

/* ---------- 10. 图片容器与占位 ---------- */
.frame{
  position:relative;
  display:block;
  overflow:hidden;
  background:var(--ink-2);
  border:1px solid rgba(200,164,85,.24);
  border-radius:2px;
}
.frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  object-position:center;
}
.frame--16x9{aspect-ratio:16 / 9}
.frame--4x3{aspect-ratio:4 / 3}
.frame--21x9{aspect-ratio:21 / 9}
.frame--3x4{aspect-ratio:3 / 4}
.frame--1x1{aspect-ratio:1 / 1}
.frame__cap{
  position:absolute;
  left:0;right:0;bottom:0;
  padding:12px 16px;
  background:linear-gradient(0deg,rgba(11,11,13,.88),rgba(11,11,13,0));
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--gold-lt);
}
.ph{
  position:relative;
  display:grid;
  place-items:center;
  min-height:160px;
  padding:20px;
  background:
    linear-gradient(135deg,rgba(200,164,85,.10),rgba(200,164,85,0) 62%),
    repeating-linear-gradient(90deg,rgba(200,164,85,.07) 0 1px,transparent 1px 48px),
    var(--ink-2);
  border:1px solid rgba(200,164,85,.22);
  border-radius:2px;
  color:rgba(232,206,140,.62);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  text-align:center;
}

/* ---------- 11. 显现协议 ---------- */
[data-reveal]{
  transition:opacity var(--dur-slow) var(--ease),transform var(--dur-slow) var(--ease);
}
html.js-reveal [data-reveal]:not(.is-revealed){
  opacity:0;
  transform:translateY(18px);
}

/* ============================================================
   12. 命令栏页头
   ============================================================ */
.cmdbar{
  position:sticky;
  top:0;
  z-index:80;
  background:var(--ink);
  color:var(--paper);
  border-bottom:1px solid rgba(200,164,85,.26);
}
.cmdbar::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:repeating-linear-gradient(90deg,rgba(200,164,85,.075) 0 1px,transparent 1px 96px);
}

.cmdbar__inner{
  position:relative;
  z-index:1;
  display:flex;
  align-items:center;
  gap:clamp(12px,2vw,32px);
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
  min-height:68px;
}

.cmdbar__progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  z-index:2;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--gold),var(--gold-lt));
  pointer-events:none;
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  color:var(--paper);
}
.brand__mark{
  width:38px;
  height:38px;
  flex:0 0 auto;
  color:var(--gold);
  transition:color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.brand:hover .brand__mark{color:var(--gold-lt);transform:rotate(90deg)}
.brand__text{display:flex;flex-direction:column;line-height:1.15}
.brand__name{
  font-family:var(--font-serif);
  font-weight:900;
  font-size:17px;
  letter-spacing:.06em;
  white-space:nowrap;
}
.brand__coord{
  margin-top:3px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  color:var(--mist);
  white-space:nowrap;
}

/* 导航 */
.cmdnav{flex:1 1 auto;min-width:0}
.cmdnav__list{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:clamp(8px,1.6vw,26px);
}
.cmdnav__link{
  position:relative;
  display:inline-block;
  padding:9px 2px 11px;
  font-size:15px;
  font-weight:500;
  letter-spacing:.05em;
  white-space:nowrap;
  color:rgba(242,234,217,.7);
  transition:color var(--dur) var(--ease);
}
.cmdnav__link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:2px;
  height:2px;
  background:var(--gold);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--dur) var(--ease);
}
.cmdnav__link:hover{color:var(--paper)}
.cmdnav__link:hover::after{transform:scaleX(.45)}
.cmdnav__link[aria-current="page"]{color:var(--gold-lt)}
.cmdnav__link[aria-current="page"]::after{transform:scaleX(1)}

/* 工具区 */
.cmdbar__tools{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  margin-left:auto;
}
.toolsearch{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:34px;
  padding:0 14px;
  border:1px solid rgba(200,164,85,.32);
  border-radius:2px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--mist);
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.toolsearch svg{width:13px;height:13px;flex:0 0 auto}
.toolsearch:hover{border-color:var(--gold);color:var(--gold-lt)}

.cmdbar__cta{
  display:inline-flex;
  align-items:center;
  height:34px;
  padding:0 16px;
  border-radius:2px;
  background:var(--cinnabar);
  color:#FFF3EC;
  font-size:13px;
  letter-spacing:.08em;
  white-space:nowrap;
  transition:background var(--dur) var(--ease);
}
.cmdbar__cta:hover{background:var(--cinnabar-lt)}

.navtoggle{
  display:none;
  width:38px;
  height:34px;
  align-items:center;
  justify-content:center;
  border:1px solid rgba(200,164,85,.38);
  border-radius:2px;
  color:var(--gold);
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.navtoggle:hover{border-color:var(--gold);color:var(--gold-lt)}
.navtoggle__bars{position:relative;display:block;width:16px;height:10px}
.navtoggle__bars::before,
.navtoggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:1.6px;
  background:currentColor;
  transition:transform var(--dur) var(--ease),top var(--dur) var(--ease),bottom var(--dur) var(--ease);
}
.navtoggle__bars::before{top:0}
.navtoggle__bars::after{bottom:0}
.cmdbar[data-open] .navtoggle__bars::before{top:4.2px;transform:rotate(45deg)}
.cmdbar[data-open] .navtoggle__bars::after{bottom:4.2px;transform:rotate(-45deg)}

/* ============================================================
   13. 页脚（暖纸底）
   ============================================================ */
.sitefoot{
  position:relative;
  background:var(--paper);
  color:var(--ink);
  border-top:3px solid var(--gold);
}
.sitefoot__inner{
  max-width:var(--shell);
  margin-inline:auto;
  padding:clamp(44px,6vw,78px) var(--gutter) 0;
}
.sitefoot__cols{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.4fr;
  gap:clamp(24px,3vw,48px);
}

.footmark{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.footmark__icon{width:40px;height:40px;flex:0 0 auto;color:var(--gold)}
.footmark__name{
  font-family:var(--font-serif);
  font-weight:900;
  font-size:20px;
  letter-spacing:.06em;
}

.footcol__title{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:16px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--jade-d);
}
.footcol__title::after{
  content:"";
  flex:1 1 auto;
  height:1px;
  background:rgba(53,99,91,.3);
}

.footcol__list{display:flex;flex-direction:column;gap:10px}
.footcol__list--meta{gap:8px}
.footcol__list a{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-size:15px;
  color:#2A2A2E;
  transition:color var(--dur) var(--ease);
}
.footcol__list a::before{
  content:"";
  width:6px;
  height:1px;
  flex:0 0 auto;
  background:var(--gold);
  transition:width var(--dur) var(--ease),background var(--dur) var(--ease);
}
.footcol__list a:hover{color:var(--cinnabar)}
.footcol__list a:hover::before{width:15px;background:var(--cinnabar)}

.footcol__meta{
  font-family:var(--font-mono);
  font-size:13px;
  line-height:1.95;
  letter-spacing:.03em;
  color:#3A3A3E;
  word-break:break-word;
}
.footcol__note{
  font-size:13.5px;
  line-height:1.85;
  color:var(--mist-dark);
  max-width:26em;
}
.footcol--mark .footcol__note{margin-top:14px}
.footcol__cta{
  margin-top:18px;
  padding:9px 18px;
  font-size:14px;
  border-color:rgba(11,11,13,.34);
  color:var(--ink);
}
.footcol__cta:hover{background:var(--ink);border-color:var(--ink);color:var(--paper)}

.sitefoot__base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  margin-top:clamp(36px,5vw,64px);
  padding:22px 0 30px;
  border-top:1px solid rgba(11,11,13,.14);
}
.sitefoot__base p{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--mist-dark);
}
.sitefoot__nav{display:flex;align-items:center;flex-wrap:wrap;gap:18px}
.sitefoot__nav a{
  font-size:13.5px;
  color:#3A3A3E;
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.sitefoot__nav a:hover{color:var(--cinnabar);border-bottom-color:var(--cinnabar)}

.totop{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 15px;
  border:1px solid rgba(11,11,13,.32);
  border-radius:2px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--ink);
  transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.totop svg{width:12px;height:12px;transition:transform var(--dur) var(--ease)}
.totop:hover{background:var(--gold);border-color:var(--gold)}
.totop:hover svg{transform:translateY(-2px)}

/* ============================================================
   14. 响应式
   ============================================================ */
@media (max-width:1080px){
  .brand__coord{display:none}
  .cmdnav__list{gap:12px}
  .cmdnav__link{font-size:14px}
}

@media (max-width:960px){
  html{scroll-padding-top:150px}
  .cmdbar__inner{
    flex-wrap:wrap;
    align-items:center;
    gap:10px;
    padding-top:10px;
    padding-bottom:2px;
    min-height:0;
  }
  .brand{order:1}
  .cmdbar__tools{order:2}
  .cmdnav{order:3;flex:1 1 100%;width:100%}

  .cmdnav__list{
    justify-content:flex-start;
    gap:8px;
    padding-bottom:12px;
    overflow-x:auto;
    overflow-y:hidden;
    scrollbar-width:none;
    -ms-overflow-style:none;
    -webkit-overflow-scrolling:touch;
  }
  .cmdnav__list::-webkit-scrollbar{display:none}

  .cmdnav__link{
    padding:7px 14px;
    font-size:14px;
    border:1px solid rgba(200,164,85,.3);
    border-radius:999px;
  }
  .cmdnav__link::after{display:none}
  .cmdnav__link:hover{color:var(--paper)}
  .cmdnav__link[aria-current="page"]{
    background:var(--gold);
    border-color:var(--gold);
    color:var(--ink);
  }

  .navtoggle{display:inline-flex}
  .toolsearch{padding:0 10px}
  .toolsearch__label{display:none}

  .cmdbar[data-open] .cmdnav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    overflow:visible;
    padding-bottom:14px;
  }
  .cmdbar[data-open] .cmdnav__link{
    display:block;
    padding:13px 4px;
    border:0;
    border-bottom:1px solid rgba(200,164,85,.16);
    border-radius:0;
    font-size:16px;
  }
  .cmdbar[data-open] .cmdnav__link[aria-current="page"]{
    background:transparent;
    color:var(--gold-lt);
  }

  .sitefoot__cols{grid-template-columns:1fr 1fr}
  .footcol--mark{grid-column:1 / -1}
}

@media (max-width:560px){
  .sitefoot__cols{grid-template-columns:1fr;gap:32px}
  .footcol--mark{grid-column:auto}
  .sitefoot__base{flex-direction:column;align-items:flex-start}
  .sitefoot__nav{width:100%;justify-content:space-between}
  .brand__mark{width:32px;height:32px}
  .brand__name{font-size:15.5px;letter-spacing:.03em}
  .cmdbar__cta{padding:0 12px;font-size:12.5px}
}

@media (max-width:380px){
  .brand__text{display:none}
}

/* ============================================================
   15. 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;
  }
  html.js-reveal [data-reveal]:not(.is-revealed){opacity:1;transform:none}
  .brand:hover .brand__mark{transform:none}
  .totop:hover svg{transform:none}
}