/* ============================================================
   亿兆游艺 · 共享站点样式 /assets/site.css
   墨蓝案头 · 纸白条款 · 琥珀金一步 · 青瓷绿对照
   ============================================================ */

/* ---------- 1. 设计变量 ---------- */
:root{
  /* 墨蓝阶 */
  --ink-900:#0B1622;
  --ink-800:#0F2033;
  --ink-700:#16293D;
  --line-500:#2C4257;
  /* 纸白阶 */
  --paper-100:#F2ECDF;
  --paper-300:#DCD3C2;
  --paper-edge:#C6BBA6;
  /* 琥珀金 */
  --amber-400:#E3A44A;
  --amber-200:#F3CE94;
  --amber-ink:#231505;
  /* 青瓷绿 */
  --celadon-400:#6FA795;
  --celadon-200:#A9CBBF;
  /* 文字 */
  --text-100:#EDE7DA;
  --text-400:#A8B7C4;
  --focus:#FFD27A;

  /* 字体 */
  --font-display:"Source Han Serif SC","Noto Serif SC","Songti SC","STSong",serif;
  --font-sans:"Inter","Noto Sans SC",system-ui,"PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,"SFMono-Regular",Menlo,monospace;

  /* 尺寸与节奏 */
  --shell:1240px;
  --pad:24px;
  --space-1:32px;
  --space-2:56px;
  --space-3:96px;

  /* 动效 */
  --dur-fast:160ms;
  --dur-mid:240ms;
  --ease:cubic-bezier(.22,.61,.28,1);
}

/* ---------- 2. 重置 ---------- */
*,
*::before,
*::after{box-sizing:border-box;}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:104px;
}

body,
h1,h2,h3,h4,h5,h6,
p,ul,ol,dl,dd,figure,blockquote,pre{margin:0;}

ul,ol{padding:0;list-style:none;}

img,picture,svg,video{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;border-spacing:0;}

::selection{background:var(--amber-400);color:var(--ink-900);}

/* ---------- 3. 基础排版 ---------- */
body{
  background:var(--ink-900);
  color:var(--text-100);
  font-family:var(--font-sans);
  font-size:17px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:600;
  letter-spacing:.02em;
  line-height:1.24;
  color:var(--text-100);
}

h1{font-size:clamp(30px,4.2vw,56px);font-weight:700;}
h2{font-size:26px;font-weight:600;}
h3{font-size:22px;font-weight:600;}
h4{font-size:17px;font-weight:700;letter-spacing:.04em;}

p{max-width:72ch;}

strong{font-weight:600;color:var(--text-100);}

small{font-size:12.5px;}

:focus-visible{
  outline:2px solid var(--focus);
  outline-offset:2px;
  box-shadow:0 0 0 4px rgba(255,210,122,.22);
}

/* ---------- 4. 容器与栅格 ---------- */
.shell{
  width:100%;
  max-width:calc(var(--shell) + var(--pad) * 2);
  margin-inline:auto;
  padding-inline:var(--pad);
}

.grid{display:grid;gap:var(--space-1);}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
.grid--aside{grid-template-columns:280px minmax(0,1fr);gap:48px;}

.section{padding-block:var(--space-2);}
.section--deep{background:var(--ink-800);}
.section--paper{background:var(--paper-100);color:var(--ink-900);}
.section--paper h2,
.section--paper h3,
.section--paper h4{color:var(--ink-900);}
.section--paper strong{color:var(--ink-900);}

.blueprint{
  background-image:
    linear-gradient(to right,rgba(44,66,87,.38) 0 1px,transparent 1px 100%),
    linear-gradient(to bottom,rgba(44,66,87,.26) 0 1px,transparent 1px 100%);
  background-size:96px 100%,100% 96px;
  background-position:0 0,0 0;
}

#main-content{display:block;scroll-margin-top:130px;}

/* ---------- 5. 按钮与标签 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:40px;
  padding:9px 18px;
  border:1px solid transparent;
  font-family:var(--font-sans);
  font-size:14px;
  font-weight:600;
  letter-spacing:.06em;
  line-height:1.2;
  white-space:nowrap;
  transition:background var(--dur-fast) var(--ease),
             color var(--dur-fast) var(--ease),
             border-color var(--dur-fast) var(--ease);
}

.btn--primary{
  background:var(--amber-400);
  border-color:var(--amber-400);
  color:var(--amber-ink);
}
.btn--primary:hover,
.btn--primary:focus-visible{
  background:var(--amber-200);
  border-color:var(--amber-200);
}

.btn--ghost{
  background:transparent;
  border-color:rgba(227,164,74,.55);
  color:var(--amber-200);
}
.btn--ghost:hover,
.btn--ghost:focus-visible{
  background:rgba(227,164,74,.14);
  border-color:var(--amber-400);
  color:var(--amber-400);
}

.btn--quiet{
  background:var(--ink-700);
  border-color:var(--line-500);
  color:var(--text-100);
}
.btn--quiet:hover,
.btn--quiet:focus-visible{
  border-color:var(--celadon-400);
  color:var(--celadon-200);
}

.kicker{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--amber-400);
}
.kicker::before{
  content:"";
  width:24px;
  height:1px;
  background:var(--amber-400);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  border:1px solid var(--celadon-200);
  background:rgba(111,167,149,.09);
  color:var(--celadon-200);
  font-size:12px;
  font-weight:600;
  letter-spacing:.08em;
  line-height:1.5;
}
.tag--amber{
  border-color:rgba(227,164,74,.7);
  background:rgba(227,164,74,.12);
  color:var(--amber-400);
}

.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}

.text-muted{color:var(--text-400);}

/* ---------- 6. 面包屑 ---------- */
.breadcrumb{
  padding-block:18px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--text-400);
}
.breadcrumb-list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
}
.breadcrumb-list a{
  color:var(--text-400);
  border-bottom:1px solid transparent;
  transition:color var(--dur-fast) var(--ease),
             border-color var(--dur-fast) var(--ease);
}
.breadcrumb-list a:hover,
.breadcrumb-list a:focus-visible{
  color:var(--amber-200);
  border-bottom-color:var(--amber-200);
}
.breadcrumb-list [aria-current="page"]{color:var(--text-100);}
.breadcrumb-sep{color:var(--line-500);}

/* ---------- 7. 纸质区块与正文 ---------- */
.paper-block{
  position:relative;
  padding:40px 32px 32px;
  background:var(--paper-100);
  border:1px solid var(--paper-edge);
  color:var(--ink-900);
  box-shadow:6px 6px 0 0 rgba(220,211,194,.5),
             12px 12px 0 0 rgba(44,66,87,.32);
}
.paper-block::before{
  content:attr(data-field);
  position:absolute;
  top:0;
  left:0;
  min-width:14px;
  padding:3px 9px;
  background:var(--amber-400);
  color:var(--amber-ink);
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.08em;
  line-height:1.4;
}
.paper-block h2,
.paper-block h3,
.paper-block h4{color:var(--ink-900);}
.paper-block strong{color:var(--ink-900);}

.prose{
  max-width:68ch;
  font-size:16.5px;
  line-height:1.8;
  color:var(--text-100);
}
.prose > * + *{margin-top:16px;}
.prose h2,.prose h3,.prose h4{margin-top:32px;}
.prose ul{list-style:disc;padding-left:20px;}
.prose ol{list-style:decimal;padding-left:20px;}
.prose li + li{margin-top:6px;}
.prose a{
  color:var(--amber-200);
  border-bottom:1px solid rgba(243,206,148,.5);
  transition:color var(--dur-fast) var(--ease),
             border-color var(--dur-fast) var(--ease);
}
.prose a:hover,
.prose a:focus-visible{
  color:var(--amber-400);
  border-bottom-color:var(--amber-400);
}
.paper-block .prose,
.section--paper .prose{color:var(--ink-900);}
.paper-block .prose a,
.section--paper .prose a{
  color:#8A5A12;
  border-bottom-color:rgba(138,90,18,.45);
}

/* ---------- 8. 图片容器（供页面阶段放图） ---------- */
.media{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  background:var(--ink-700);
  border:1px solid var(--line-500);
}
.media--ratio{aspect-ratio:16 / 10;}
.media--ratio-wide{aspect-ratio:21 / 9;}
.media--ratio-square{aspect-ratio:1 / 1;}
.media img,
.media picture,
.media picture img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media--paper{
  background:var(--paper-300);
  border-color:var(--paper-edge);
  box-shadow:6px 6px 0 0 rgba(220,211,194,.45),
             12px 12px 0 0 rgba(44,66,87,.3);
}
.media--tinted::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(11,22,34,0) 42%,rgba(11,22,34,.62) 100%);
  pointer-events:none;
}

/* ---------- 9. 跳转链接 ---------- */
.skip-link{
  position:fixed;
  left:16px;
  top:-96px;
  z-index:300;
  padding:12px 20px;
  background:var(--amber-400);
  color:var(--amber-ink);
  font-size:14px;
  font-weight:600;
  letter-spacing:.06em;
  transition:top var(--dur-fast) var(--ease);
}
.skip-link:focus{
  top:16px;
}

/* ---------- 10. 头部 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--ink-900);
  border-bottom:1px solid var(--line-500);
}

.header-upper{
  overflow:hidden;
  max-height:260px;
  background:var(--ink-900);
  border-bottom:1px solid var(--line-500);
  transition:max-height var(--dur-mid) var(--ease),
             opacity var(--dur-mid) var(--ease);
}
.site-header.is-condensed .header-upper{
  max-height:0;
  opacity:0;
}

.header-upper-inner{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,360px) auto;
  align-items:center;
  gap:16px 32px;
  min-height:78px;
  padding-block:14px;
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  min-width:0;
}
.brand-mark{
  display:grid;
  place-items:center;
  flex:0 0 38px;
  width:38px;
  height:38px;
  border:1px solid var(--amber-400);
  background:linear-gradient(155deg,rgba(227,164,74,.2),rgba(227,164,74,0) 72%);
  color:var(--amber-400);
  font-family:var(--font-display);
  font-size:20px;
  font-weight:700;
  line-height:1;
}
.brand-text{
  display:flex;
  flex-direction:column;
  min-width:0;
}
.brand-name{
  display:block;
  font-family:var(--font-display);
  font-size:19px;
  font-weight:700;
  letter-spacing:.08em;
  line-height:1.3;
  color:var(--text-100);
}
.brand-line{
  display:block;
  font-size:12px;
  letter-spacing:.12em;
  line-height:1.5;
  color:var(--text-400);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.brand:hover .brand-name,
.brand:focus-visible .brand-name{color:var(--amber-200);}

/* 检索门片 */
.search-gate{
  display:flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  padding:8px 14px;
  border:1px solid var(--line-500);
  background:var(--ink-800);
  color:var(--text-400);
  transition:border-color var(--dur-fast) var(--ease),
             background var(--dur-fast) var(--ease),
             color var(--dur-fast) var(--ease);
}
.search-gate:hover,
.search-gate:focus-visible{
  border-color:var(--celadon-400);
  background:var(--ink-700);
  color:var(--text-100);
}
.search-gate-label{
  flex:0 0 auto;
  font-size:13px;
  font-weight:600;
  letter-spacing:.08em;
  color:var(--celadon-200);
}
.search-gate-hint{
  flex:1 1 auto;
  min-width:0;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.03em;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.search-gate-go{
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--line-500);
  transition:color var(--dur-fast) var(--ease),
             transform var(--dur-fast) var(--ease);
}
.search-gate:hover .search-gate-go,
.search-gate:focus-visible .search-gate-go{
  color:var(--celadon-400);
  transform:translateX(3px);
}

/* 工具组 */
.header-utility{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:18px;
  flex-wrap:wrap;
}
.utility-link{
  padding-bottom:2px;
  border-bottom:1px solid transparent;
  font-size:13px;
  letter-spacing:.06em;
  color:var(--text-400);
  transition:color var(--dur-fast) var(--ease),
             border-color var(--dur-fast) var(--ease);
}
.utility-link:hover,
.utility-link:focus-visible{
  color:var(--amber-200);
  border-bottom-color:var(--amber-200);
}
.update-stamp{
  padding:4px 9px;
  border:1px solid rgba(44,66,87,.95);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.04em;
  color:var(--text-400);
  white-space:nowrap;
}

/* 栏目层 */
.header-nav{background:var(--ink-800);}
.site-header.is-condensed .header-nav{
  box-shadow:0 1px 0 var(--line-500),0 10px 26px rgba(0,0,0,.4);
}
.header-nav-inner{
  position:relative;
  display:flex;
  align-items:center;
  gap:28px;
  min-height:56px;
}
.rail-caption{
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--text-400);
  white-space:nowrap;
}
.site-nav{margin-left:auto;}
.site-nav-list{
  display:flex;
  align-items:center;
  gap:2px;
}
.site-nav a{
  position:relative;
  display:inline-block;
  padding:17px 14px;
  font-size:15px;
  letter-spacing:.04em;
  color:var(--text-400);
  transition:color var(--dur-fast) var(--ease);
}
.site-nav a::after{
  content:"";
  position:absolute;
  left:14px;
  right:14px;
  bottom:9px;
  height:2px;
  background:var(--amber-200);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--dur-fast) var(--ease),
             background var(--dur-fast) var(--ease);
}
.site-nav a:hover{color:var(--text-100);}
.site-nav a:hover::after{transform:scaleX(1);}
.site-nav a:focus-visible{color:var(--text-100);}
.site-nav a[aria-current="page"]{color:var(--text-100);}
.site-nav a[aria-current="page"]::after{
  transform:scaleX(1);
  background:var(--amber-400);
}

/* 移动端栏目按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  min-height:48px;
  padding:10px 4px;
  color:var(--text-100);
}
.nav-toggle-bars{
  display:inline-flex;
  flex-direction:column;
  justify-content:center;
  gap:4px;
  width:20px;
}
.nav-toggle-bars i{
  display:block;
  height:1px;
  background:var(--text-400);
  transition:transform var(--dur-fast) var(--ease),
             opacity var(--dur-fast) var(--ease),
             background var(--dur-fast) var(--ease);
}
.nav-toggle-text{
  font-size:14px;
  font-weight:600;
  letter-spacing:.1em;
}
.nav-toggle:hover .nav-toggle-bars i{background:var(--amber-200);}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i{background:var(--amber-400);}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(1){transform:translateY(5px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg);}

/* ---------- 11. 页脚 ---------- */
.site-footer{
  background:var(--ink-900);
  border-top:1px solid var(--line-500);
  color:var(--text-400);
}
.footer-inner{
  display:block;
  padding-block:var(--space-2) 32px;
}
.footer-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:36px 28px;
}
.footer-brand{
  grid-column:1 / -1;
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px 32px;
  flex-wrap:wrap;
  padding-bottom:22px;
  border-bottom:1px solid var(--line-500);
}
.footer-motto{
  max-width:36ch;
  font-family:var(--font-display);
  font-size:15px;
  letter-spacing:.06em;
  color:var(--text-400);
}
.footer-col{min-width:0;}
.footer-col-title{
  margin-bottom:14px;
  padding-bottom:10px;
  border-bottom:1px solid var(--line-500);
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.16em;
  color:var(--text-400);
}
.footer-list{
  display:flex;
  flex-direction:column;
  gap:2px;
}
.footer-link{
  display:inline-block;
  padding:5px 0;
  font-size:14px;
  color:var(--text-100);
  transition:color var(--dur-fast) var(--ease);
}
.footer-link:hover,
.footer-link:focus-visible{color:var(--amber-200);}
.footer-item{
  padding:5px 0;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.02em;
  color:var(--text-400);
}
.footer-meta{
  display:flex;
  flex-direction:column;
  gap:8px;
  margin-bottom:4px;
}
.footer-meta-row{
  display:flex;
  align-items:baseline;
  gap:10px;
  max-width:none;
}
.footer-meta-key{
  flex:0 0 auto;
  min-width:2.4em;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--text-400);
}
.footer-meta-val{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.01em;
  color:var(--text-100);
  word-break:break-all;
}
.footer-meta-val--text{
  font-family:var(--font-sans);
  font-size:13.5px;
  line-height:1.6;
  word-break:normal;
}
.footer-cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-top:12px;
  padding:8px 16px;
  border:1px solid rgba(227,164,74,.6);
  color:var(--amber-200);
  font-size:13px;
  font-weight:600;
  letter-spacing:.08em;
  transition:background var(--dur-fast) var(--ease),
             border-color var(--dur-fast) var(--ease),
             color var(--dur-fast) var(--ease);
}
.footer-cta::after{
  content:"→";
  font-family:var(--font-mono);
  font-weight:400;
}
.footer-cta:hover,
.footer-cta:focus-visible{
  background:rgba(227,164,74,.14);
  border-color:var(--amber-400);
  color:var(--amber-400);
}
.footer-service{
  margin-top:14px;
  padding-left:12px;
  border-left:1px solid var(--celadon-400);
  font-size:12.5px;
  line-height:1.7;
  color:var(--text-400);
}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px 24px;
  flex-wrap:wrap;
  margin-top:40px;
  padding-top:20px;
  border-top:1px solid var(--line-500);
}
.footer-legal{
  max-width:none;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.05em;
  color:var(--text-400);
}

/* ---------- 12. 响应式 ---------- */
@media (max-width:1100px){
  .header-upper-inner{
    grid-template-columns:minmax(0,1fr) auto;
    gap:14px 24px;
  }
  .search-gate{
    grid-column:1 / -1;
    grid-row:2;
  }
  .grid--aside{grid-template-columns:minmax(0,1fr);gap:32px;}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}

@media (max-width:860px){
  :root{--pad:18px;--space-2:44px;--space-3:64px;}

  .header-upper-inner{
    grid-template-columns:minmax(0,1fr);
    gap:12px;
    padding-block:14px;
  }
  .search-gate{grid-row:auto;}
  .header-utility{
    justify-content:flex-start;
    gap:10px 16px;
  }
  .rail-caption{display:none;}
  .header-nav-inner{gap:0;min-height:54px;}
  .nav-toggle{display:inline-flex;}
  .site-nav{
    position:absolute;
    left:calc(-1 * var(--pad));
    right:calc(-1 * var(--pad));
    top:100%;
    display:none;
    margin-left:0;
    max-height:calc(100vh - 120px);
    overflow-y:auto;
    padding:6px var(--pad) 20px;
    background:var(--ink-800);
    border-top:1px solid var(--line-500);
    border-bottom:1px solid var(--line-500);
    box-shadow:0 20px 44px rgba(0,0,0,.5);
  }
  .site-nav[data-open]{display:block;}
  .site-nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .site-nav a{
    display:block;
    padding:15px 14px;
    font-size:16px;
    border-bottom:1px solid rgba(44,66,87,.65);
  }
  .site-nav a::after{
    left:0;
    right:auto;
    top:50%;
    bottom:auto;
    width:2px;
    height:18px;
    background:var(--amber-400);
    transform:translateY(-50%) scaleY(0);
    transform-origin:center top;
  }
  .site-nav a:hover::after,
  .site-nav a[aria-current="page"]::after{
    transform:translateY(-50%) scaleY(1);
  }

  .grid--2,
  .grid--3{grid-template-columns:minmax(0,1fr);}
  .paper-block{padding:36px 20px 26px;box-shadow:5px 5px 0 0 rgba(220,211,194,.5);}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px 20px;}
}

@media (max-width:560px){
  body{font-size:16px;}
  .brand-line{display:none;}
  .search-gate-hint{font-size:10.5px;}
  .footer-grid{grid-template-columns:minmax(0,1fr);}
  .footer-brand{align-items:flex-start;flex-direction:column;gap:12px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
}

@media (max-width:400px){
  .search-gate-hint{display:none;}
}

/* ---------- 13. 减少动态效果 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
}