/* ============================================================
   神人棋牌 · 共享样式 /assets/site.css
   牌桌绒布底 · 铜边印刷线 · 牌谱批注层级
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root{
  --ink-green:#0A2A21;
  --felt-green:#123B2F;
  --stripe-green:#1A4A3B;
  --copper:#8A6A2F;
  --amber:#E2A93B;
  --gold:#F7D583;
  --cinnabar:#C6402D;
  --cool-cyan:#56B7C9;
  --deep-blue:#1C4E63;
  --porcelain:#F3EFE4;
  --ash:#B7B1A1;

  --font-display:'Noto Serif SC','Songti SC','STSong','SimSun',serif;
  --font-body:'Noto Sans SC','PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,sans-serif;
  --font-mono:'JetBrains Mono','IBM Plex Mono','SFMono-Regular',Menlo,Consolas,monospace;

  --wrap:1180px;
  --edge:clamp(18px,4vw,40px);
  --radius:4px;
  --line-copper:1px solid rgba(138,106,47,.55);
  --line-amber:1px solid rgba(226,169,59,.65);
  --shadow-paper:6px 6px 0 -1px rgba(10,42,33,.92), 10px 10px 0 -2px rgba(138,106,47,.22);
  --ease:cubic-bezier(.2,.7,.3,1);
}

/* ---------- 2. 重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse}

/* ---------- 3. 中文排版与底色 ---------- */
body{
  min-height:100vh;
  background-color:var(--ink-green);
  background-image:
    radial-gradient(1100px 560px at 8% -12%, rgba(138,106,47,.22), transparent 62%),
    radial-gradient(920px 520px at 104% 3%, rgba(86,183,201,.10), transparent 58%),
    repeating-linear-gradient(135deg, rgba(255,255,255,.014) 0 2px, transparent 2px 6px);
  color:var(--porcelain);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.24;
  letter-spacing:-.02em;
  color:var(--porcelain);
}
h1{font-size:clamp(38px,7vw,96px)}
h2{font-size:clamp(25px,3.3vw,42px)}
h3{font-size:clamp(19px,2vw,24px)}
h4{font-size:16px;letter-spacing:.02em}
p{max-width:34em}
strong{color:var(--gold);font-weight:700}
::selection{background:var(--amber);color:#1E1607}

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

/* ---------- 4. 布局容器 ---------- */
.wrap{width:min(calc(100% - 2 * var(--edge)), var(--wrap));margin-inline:auto}
.section{padding-block:clamp(44px,6.5vw,92px)}
.grid{display:grid;gap:clamp(16px,2.2vw,26px)}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(255px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(205px,1fr))}
.grid--split{grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);align-items:start}

/* ---------- 5. 索引与批注元素 ---------- */
.label{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--ash);
}
.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-weight:600;
  letter-spacing:.01em;
}
.chapter-num{
  display:block;
  font-family:var(--font-mono);
  font-weight:600;
  font-size:clamp(36px,6.5vw,80px);
  line-height:.92;
  letter-spacing:-.02em;
  color:transparent;
  -webkit-text-stroke:1px rgba(138,106,47,.8);
  margin-bottom:10px;
}
.rule{
  height:1px;
  border:0;
  background:linear-gradient(90deg, rgba(138,106,47,.7), rgba(138,106,47,0));
  margin-block:clamp(18px,2.4vw,30px);
}
.prose{max-width:34em}
.prose p{margin-bottom:1.1em}
.prose p:last-child{margin-bottom:0}
.text-ash{color:var(--ash)}
.text-amber{color:var(--amber)}
.text-cinnabar{color:var(--cinnabar)}
.text-cyan{color:var(--cool-cyan)}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5em;
  padding:.6em 1.05em;
  border:var(--line-copper);
  border-radius:3px;
  background:linear-gradient(180deg, rgba(26,74,59,.85), rgba(18,59,47,.92));
  color:var(--porcelain);
  font-size:14px;
  line-height:1.4;
  letter-spacing:.06em;
  white-space:nowrap;
  cursor:pointer;
  transition:background .22s var(--ease), border-color .22s var(--ease),
             color .22s var(--ease), transform .22s var(--ease);
}
.btn:hover{border-color:rgba(226,169,59,.8);color:var(--gold);transform:translateY(-1px)}
.btn-amber{
  background:linear-gradient(180deg,#F0C060,#D69B2B);
  border-color:var(--gold);
  color:#1E1607;
  font-weight:700;
}
.btn-amber:hover{background:linear-gradient(180deg,#F7D583,#E2A93B);color:#1E1607}
.btn-ghost{background:transparent}
.btn-quiet{
  background:transparent;
  border-color:rgba(138,106,47,.4);
  color:var(--ash);
}
.btn-quiet:hover{color:var(--gold);border-color:rgba(226,169,59,.7)}

/* ---------- 7. 纸张叠层卡片与牌角浮层 ---------- */
.paper{
  position:relative;
  padding:clamp(18px,2.4vw,28px);
  border:var(--line-copper);
  border-radius:var(--radius);
  background:linear-gradient(180deg, rgba(26,74,59,.72), rgba(18,59,47,.94));
  box-shadow:var(--shadow-paper);
  transition:transform .28s var(--ease), box-shadow .28s var(--ease), border-color .28s var(--ease);
}
.paper:hover{
  transform:translateY(-4px) rotate(-.5deg);
  border-color:rgba(226,169,59,.55);
  box-shadow:8px 10px 0 -1px rgba(10,42,33,.92), 0 0 0 1px rgba(226,169,59,.32);
}
.corner-chip{
  position:absolute;
  top:-1px;
  right:-1px;
  display:grid;
  gap:2px;
  justify-items:end;
  padding:9px 12px;
  border:var(--line-amber);
  border-radius:0 var(--radius) 0 var(--radius);
  background:linear-gradient(155deg, rgba(226,169,59,.20), rgba(10,42,33,.96) 70%);
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:12px;
  letter-spacing:.08em;
  line-height:1.35;
  color:var(--gold);
  z-index:1;
}
.corner-chip strong{font-size:20px;font-weight:600;color:var(--amber);display:block}

/* ---------- 8. 图片容器基础规则 ---------- */
.figure{
  position:relative;
  overflow:hidden;
  aspect-ratio:16 / 10;
  border:var(--line-copper);
  border-radius:var(--radius);
  background:
    repeating-linear-gradient(90deg, rgba(138,106,47,.14) 0 1px, transparent 1px 22px),
    linear-gradient(140deg,#1A4A3B,#0A2A21);
}
.figure img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .55s var(--ease);
}
.figure::after{
  content:"";
  position:absolute;
  inset:6px;
  border:1px solid rgba(138,106,47,.35);
  border-radius:2px;
  pointer-events:none;
}
.figure:hover img{transform:scale(1.03)}
.figure--wide{aspect-ratio:21 / 9}
.figure--tall{aspect-ratio:4 / 5}
.figure--square{aspect-ratio:1 / 1}

/* ---------- 9. 面包屑 ---------- */
.breadcrumb{margin-bottom:22px}
.breadcrumb ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--ash);
}
.breadcrumb li{display:inline-flex;align-items:center}
.breadcrumb li + li::before{content:"/";margin-right:8px;color:rgba(138,106,47,.85)}
.breadcrumb a{color:var(--ash);transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--gold)}
.breadcrumb [aria-current="page"]{color:var(--porcelain)}

/* ---------- 10. 无障碍跳转 ---------- */
.skip-link{
  position:fixed;
  top:-70px;
  left:12px;
  z-index:999;
  padding:10px 18px;
  border-radius:3px;
  background:var(--amber);
  color:#1E1607;
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:12px}

/* ---------- 11. 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:linear-gradient(180deg, rgba(18,59,47,.98), rgba(10,42,33,.96));
  border-bottom:1px solid rgba(138,106,47,.6);
  backdrop-filter:blur(6px);
  -webkit-backdrop-filter:blur(6px);
}
.scroll-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  background:linear-gradient(90deg, var(--copper), var(--amber), var(--gold));
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .12s linear;
  pointer-events:none;
}
.header-inner{
  width:min(calc(100% - 2 * var(--edge)), 1360px);
  margin-inline:auto;
  display:grid;
  grid-template-columns:auto minmax(20px,1fr) auto auto;
  align-items:center;
  gap:clamp(12px,1.8vw,28px);
  padding-block:12px;
}

/* 品牌印章 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  color:var(--porcelain);
}
.brand-stamp{
  position:relative;
  flex:0 0 auto;
  width:42px;
  height:42px;
  display:grid;
  place-items:center;
  border:1px solid rgba(226,169,59,.75);
  border-radius:3px;
  background:linear-gradient(150deg, rgba(226,169,59,.22), rgba(10,42,33,.45) 65%);
  font-family:var(--font-display);
  font-size:21px;
  font-weight:900;
  line-height:1;
  color:var(--amber);
}
.brand-stamp::after{
  content:"";
  position:absolute;
  inset:3px;
  border:1px solid rgba(138,106,47,.5);
  border-radius:2px;
}
.brand-words{display:flex;flex-direction:column;line-height:1.25}
.brand-name{
  font-family:var(--font-display);
  font-size:19px;
  font-weight:900;
  letter-spacing:.06em;
  color:var(--porcelain);
}
.brand-tag{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.2em;
  color:var(--ash);
}

/* 手数刻度轴 */
.header-axis{position:relative;height:22px;min-width:24px}
.header-axis::before{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:50%;
  height:1px;
  transform:translateY(-50%);
  background:linear-gradient(90deg, rgba(138,106,47,0), rgba(138,106,47,.7) 10%, rgba(138,106,47,.7) 90%, rgba(138,106,47,0));
}
.header-axis::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:50%;
  height:11px;
  transform:translateY(-50%);
  background-image:repeating-linear-gradient(90deg, rgba(226,169,59,.7) 0 1px, transparent 1px 28px);
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);
}

/* 主导航 */
.site-nav{justify-self:end}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-list a{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:8px 11px;
  border:1px solid transparent;
  border-radius:3px;
  font-size:15px;
  line-height:1.3;
  color:var(--porcelain);
  transition:background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}
.nav-idx{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.06em;
  color:var(--copper);
  transition:color .2s var(--ease);
}
.nav-list a:hover{background:rgba(26,74,59,.85);border-color:rgba(138,106,47,.55);color:var(--gold)}
.nav-list a:hover .nav-idx{color:var(--amber)}
.nav-list a[aria-current="page"]{
  background:rgba(226,169,59,.13);
  border-color:rgba(226,169,59,.7);
  color:var(--gold);
  box-shadow:inset 0 -2px 0 0 rgba(226,169,59,.75);
}
.nav-list a[aria-current="page"] .nav-idx{color:var(--amber)}

/* 页头动作区 */
.header-actions{display:flex;align-items:center;gap:10px;justify-self:end}
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 12px;
  border:1px solid rgba(138,106,47,.6);
  border-radius:3px;
  color:var(--porcelain);
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.1em;
}
.nav-toggle-box{display:grid;gap:4px;width:18px}
.nav-toggle-box span{
  display:block;
  height:1.5px;
  border-radius:2px;
  background:var(--amber);
  transition:transform .24s var(--ease), opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-box span:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-box span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-box span:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}

/* ---------- 12. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,7vw,96px);
  background:linear-gradient(180deg, var(--felt-green), var(--ink-green));
  border-top:1px solid rgba(138,106,47,.6);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;
  left:0;
  right:0;
  height:3px;
  background:linear-gradient(90deg, transparent, rgba(226,169,59,.55) 20%, rgba(226,169,59,.55) 80%, transparent);
}
.footer-inner{
  width:min(calc(100% - 2 * var(--edge)), var(--wrap));
  margin-inline:auto;
  display:grid;
  grid-template-columns:minmax(0,1.25fr) minmax(0,2fr);
  gap:clamp(24px,4vw,64px);
  padding-block:clamp(36px,5vw,64px) 26px;
}
.footer-brand{display:flex;flex-direction:column;align-items:flex-start;gap:14px}
.brand--footer .brand-tag{display:inline-block}
.footer-blurb{
  max-width:30em;
  font-size:14.5px;
  line-height:1.8;
  color:var(--ash);
}
.footer-cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(16px,2.4vw,36px);
}
.footer-col-title{
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--copper);
}
.footer-col ul{display:grid;gap:9px}
.footer-col a{
  display:inline-block;
  padding-bottom:2px;
  border-bottom:1px solid transparent;
  font-size:15px;
  color:var(--porcelain);
  transition:color .2s var(--ease), border-color .2s var(--ease);
}
.footer-col a:hover{color:var(--gold);border-bottom-color:rgba(226,169,59,.7)}
.footer-meta{
  width:min(calc(100% - 2 * var(--edge)), var(--wrap));
  margin-inline:auto;
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px 26px;
  padding-block:20px 30px;
  border-top:1px solid rgba(138,106,47,.35);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.05em;
  line-height:1.75;
  color:var(--ash);
}
.footer-meta p{max-width:44em}
.footer-dot{margin-inline:6px;color:rgba(138,106,47,.9)}

/* ---------- 13. 滚动显现与进度 ---------- */
.has-reveal [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .5s var(--ease), transform .5s var(--ease);
}
.has-reveal [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 14. 响应式 ---------- */
@media (max-width:1180px){
  .nav-list a{padding:8px 8px;font-size:14px}
  .brand-tag{display:none}
  .brand--footer .brand-tag{display:inline-block}
}
@media (max-width:1080px){
  .header-inner{grid-template-columns:auto 1fr auto;gap:12px}
  .header-axis{display:none}
  .brand{grid-column:1}
  .header-actions{grid-column:3;justify-self:end}
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    max-height:0;
    overflow:hidden;
    opacity:0;
    visibility:hidden;
    background:linear-gradient(180deg,#164536,#0A2A21);
    border-bottom:1px solid rgba(138,106,47,.6);
    box-shadow:0 18px 34px rgba(0,0,0,.45);
    transition:max-height .34s var(--ease), opacity .24s var(--ease), visibility .34s linear;
  }
  .site-nav[data-open]{
    max-height:76vh;
    overflow-y:auto;
    opacity:1;
    visibility:visible;
  }
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:8px var(--edge) 20px;
  }
  .nav-list a{
    padding:14px 6px;
    border-radius:0;
    border-bottom:1px solid rgba(138,106,47,.28);
    font-size:16px;
  }
  .nav-list a[aria-current="page"]{box-shadow:inset 3px 0 0 0 rgba(226,169,59,.8)}
  .grid--split{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr}
}
@media (max-width:900px){
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:600px){
  body{font-size:16px;line-height:1.8}
  .btn-quiet{display:none}
  .brand-stamp{width:36px;height:36px;font-size:18px}
  .brand-name{font-size:17px}
  .nav-toggle-text{display:none}
  .corner-chip{padding:7px 10px;font-size:11px}
  .corner-chip strong{font-size:17px}
  .footer-cols{grid-template-columns:1fr;gap:22px}
  .footer-meta{flex-direction:column;align-items:flex-start}
}

/* ---------- 15. 降低动态效果 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .paper:hover{transform:none}
  .figure:hover img{transform:none}
  .has-reveal [data-reveal]{opacity:1;transform:none}
}