/* ============================================================
   冠军白菜网 · 论坛网导航 — 共享外壳样式表
   路径：/assets/site.css
   分区：变量 / reset / 排版 / 通用组件 / 头部 / 页脚 / 响应式
   ============================================================ */

/* ---------- 1. 设计变量 ---------- */
:root{
  /* 品牌色 */
  --gold:#E0A526;          /* 冠军金：主入口按钮、关键下划线、奖杯填充 */
  --gold-deep:#8A6314;     /* 深金影：浅底上的金色文字与描边 */
  --cabbage:#4E8F6B;       /* 白菜青：分区标签、图标线条、资料类内容 */
  --leaf:#9CC9A8;          /* 嫩叶青：悬停底色、斑马纹、时间轴节点 */
  --ink-green:#0F1F19;     /* 墨绿底：页脚、实色导航、超大标题 */
  --warm:#F6F3EA;          /* 暖白：全站背景与卡片底 */
  --card:#FFFCF4;          /* 卡片微暖白 */
  --paper:#DAD5C6;         /* 纸灰：细线、网格、描边 */
  --ink:#14100C;           /* 墨黑：正文与一级标题 */
  --warn:#C4571F;          /* 警示橙：失效入口、导出失败 */
  --blue:#2F5D7C;          /* 静蓝：次按钮与默认链接 */

  /* 尺度 */
  --header-h:66px;
  --wrap:1260px;
  --gutter:clamp(18px,4.6vw,64px);
  --radius:2px;

  /* 动效 */
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:180ms;

  /* 字体 */
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular","Roboto Mono",Menlo,Consolas,"Courier New",monospace;
}

/* ---------- 2. reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
img,svg,video{display:block;max-width:100%}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--gold);outline-offset:2px;border-radius:var(--radius)}
#main-content{scroll-margin-top:calc(var(--header-h) + 14px)}

/* ---------- 3. 中文排版 ---------- */
body{
  background:var(--warm);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:clamp(16px,0.28vw + 15px,17.5px);
  line-height:1.8;
  letter-spacing:.01em;
  font-weight:400;
  overflow-x:hidden;
}
.display{
  font-size:clamp(52px,9vw,132px);
  font-weight:900;
  line-height:.95;
  letter-spacing:-.02em;
  margin:0;
  transform:scaleX(.96);
  transform-origin:left center;
}
.h2{
  font-size:clamp(28px,4vw,56px);
  font-weight:900;
  line-height:1.05;
  letter-spacing:-.02em;
  margin:0;
}
.h3{
  font-size:clamp(19px,1.6vw,26px);
  font-weight:800;
  line-height:1.3;
  letter-spacing:-.01em;
  margin:0;
}
.lede{
  font-size:clamp(17px,1.4vw,20px);
  line-height:1.7;
  font-weight:500;
  max-width:44ch;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:12px;
  font-weight:800;
  letter-spacing:.18em;
  color:var(--gold-deep);
}
.eyebrow::before{content:"";width:16px;height:2px;background:var(--gold);flex:0 0 auto}
.side-note{
  writing-mode:vertical-rl;
  font-size:12.5px;
  letter-spacing:.22em;
  line-height:1;
  color:var(--gold-deep);
}
.side-note--rot{
  writing-mode:horizontal-tb;
  transform:rotate(90deg);
  transform-origin:left top;
}
.mono{font-family:var(--font-mono);font-size:.9em;letter-spacing:0}

/* ---------- 4. 布局与通用组件 ---------- */
.wrap{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.main-offset{padding-top:calc(var(--header-h) + 24px)}
.section{padding-block:clamp(48px,7vw,104px);position:relative}
.section--tight{padding-block:clamp(28px,4vw,56px)}
.section--ink{background:var(--ink-green);color:var(--warm)}
.section--ink .h2,.section--ink .display{color:var(--warm)}
.section--ink .eyebrow{color:var(--gold)}

.prose{max-width:68ch}
.prose p+p{margin-top:1em}
.prose h2,.prose h3{margin-top:1.6em;margin-bottom:.6em}
.prose ul{max-width:68ch}
.prose li{position:relative;padding-left:1.15em}
.prose li+li{margin-top:.45em}
.prose li::before{
  content:"";position:absolute;left:0;top:.78em;
  width:8px;height:2px;background:var(--cabbage);
}

.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2vw,30px);
}
.grid-12>*{min-width:0}
.col-3{grid-column:span 3}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-9{grid-column:span 9}
.col-12{grid-column:span 12}

.rule{height:1px;background:var(--paper);border:0;margin:0}
.grid-bg{
  background-image:
    linear-gradient(to right,rgba(218,213,198,.65) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(218,213,198,.65) 1px,transparent 1px);
  background-size:64px 64px;
}
.grid-bg--dark{
  background-image:
    linear-gradient(to right,rgba(156,201,168,.12) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(156,201,168,.12) 1px,transparent 1px);
  background-size:64px 64px;
}

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5em;
  padding:.62em 1.1em;
  border:1px solid transparent;
  border-radius:var(--radius);
  font-size:14px;
  font-weight:800;
  letter-spacing:.04em;
  line-height:1.2;
  cursor:pointer;
  white-space:nowrap;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.btn-gold{background:var(--gold);color:var(--ink);border-color:var(--gold)}
.btn-gold:hover{background:var(--gold-deep);border-color:var(--gold-deep);color:var(--warm)}
.btn-outline-gold{background:transparent;color:var(--gold);border-color:var(--gold)}
.btn-outline-gold:hover{background:var(--gold);color:var(--ink)}
.btn-blue{background:transparent;color:var(--blue);border-color:var(--blue)}
.btn-blue:hover{background:var(--blue);color:var(--warm)}

/* 标签 */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  border:1px solid var(--paper);
  border-radius:var(--radius);
  font-size:12px;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--cabbage);
  background:transparent;
}
.tag--gold{color:var(--gold-deep);border-color:var(--gold)}
.tag--cabbage{background:var(--cabbage);border-color:var(--cabbage);color:var(--warm)}
.tag--leaf{background:var(--leaf);border-color:var(--leaf);color:var(--ink-green)}

/* 卡片 */
.card{
  position:relative;
  background:var(--card);
  border:1px solid var(--paper);
  border-radius:var(--radius);
  padding:clamp(18px,2vw,28px);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.card:hover{
  transform:translateY(-2px);
  border-color:var(--gold);
  box-shadow:0 1px 0 rgba(138,99,20,.14);
}
.card--offset{margin-top:6px}
.card--stack{background:var(--warm)}

/* 图形 / 图片占位容器 */
.media{
  position:relative;
  width:100%;
  aspect-ratio:16/10;
  background:var(--card);
  border:1px solid var(--paper);
  border-radius:var(--radius);
  overflow:hidden;
}
.media>*{width:100%;height:100%;object-fit:cover;display:block}
.media--square{aspect-ratio:1/1}
.media--tall{aspect-ratio:3/4}
.media--wide{aspect-ratio:21/9}
.media--grid{
  background-color:var(--warm);
  background-image:
    linear-gradient(to right,rgba(218,213,198,.7) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(218,213,198,.7) 1px,transparent 1px);
  background-size:44px 44px;
}

/* 面包屑 */
.breadcrumb{font-size:13px;color:var(--gold-deep);line-height:1.6}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";margin-right:8px;color:var(--paper)}
.breadcrumb a{border-bottom:1px solid transparent;transition:border-color var(--dur) var(--ease)}
.breadcrumb a:hover{border-bottom-color:var(--gold)}

/* ---------- 5. 头部 ---------- */
.skip-link{
  position:absolute;
  left:10px;
  top:-72px;
  z-index:200;
  padding:10px 16px;
  background:var(--gold);
  color:var(--ink);
  font-size:14px;
  font-weight:800;
  border-radius:var(--radius);
  transition:top var(--dur) var(--ease);
}
.skip-link:focus{top:10px}

.site-header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:90;
  background:transparent;
  color:var(--ink);
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.site-header.is-solid{
  background:var(--ink-green);
  color:var(--warm);
  box-shadow:0 1px 0 rgba(224,165,38,.5);
}

.header-inner{
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gutter);
  height:var(--header-h);
  display:flex;
  align-items:center;
  gap:clamp(14px,2.6vw,40px);
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  color:inherit;
}
.brand-mark{
  position:relative;
  width:22px;
  height:22px;
  flex:0 0 auto;
  background:var(--gold);
  border-radius:1px;
}
.brand-mark::before,
.brand-mark::after{
  content:"";
  position:absolute;
  left:5px;
  right:5px;
  background:var(--ink-green);
}
.brand-mark::before{top:6px;height:3px}
.brand-mark::after{bottom:6px;height:6px}
.brand-mark--footer{
  width:26px;
  height:26px;
  background:transparent;
  border:2px solid var(--gold);
}
.brand-mark--footer::before{background:var(--gold);left:6px;right:6px;top:6px;height:3px}
.brand-mark--footer::after{background:var(--gold);left:6px;right:6px;bottom:6px;height:6px}

.brand-text{display:block;line-height:1.15}
.brand-name{
  display:block;
  font-size:15px;
  font-weight:900;
  letter-spacing:-.01em;
}
.brand-sub{
  display:block;
  font-size:11px;
  font-weight:700;
  letter-spacing:.12em;
  color:var(--gold-deep);
}
.site-header.is-solid .brand-sub{color:var(--leaf)}

/* 桌面导航 */
.site-nav{
  display:flex;
  align-items:center;
  gap:clamp(12px,2vw,28px);
  margin-left:auto;
}
.nav-list{
  display:flex;
  align-items:center;
  gap:clamp(10px,1.7vw,26px);
}
.nav-list a{
  position:relative;
  display:inline-block;
  padding:8px 2px;
  font-size:14px;
  font-weight:600;
  color:inherit;
  transition:color var(--dur) var(--ease);
}
.nav-list a::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:2px;
  height:1px;
  background:var(--gold);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--dur) var(--ease);
}
.nav-list a:hover::after,
.nav-list a:focus-visible::after,
.nav-list a[aria-current="page"]::after{transform:scaleX(1)}
.nav-list a[aria-current="page"]{color:var(--gold-deep);font-weight:800}
.site-header.is-solid .nav-list a[aria-current="page"]{color:var(--gold)}

.nav-cta{flex:0 0 auto}
.site-header.is-solid .nav-cta{
  background:transparent;
  color:var(--gold);
  border-color:var(--gold);
}
.site-header.is-solid .nav-cta:hover{background:var(--gold);color:var(--ink)}

/* 移动抽屉按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  margin-left:auto;
  padding:8px 12px;
  border:1px solid currentColor;
  border-radius:var(--radius);
  font-size:13px;
  font-weight:800;
  letter-spacing:.08em;
  color:inherit;
}
.nav-toggle-bar{
  position:relative;
  display:block;
  width:16px;
  height:2px;
  background:currentColor;
  transition:background var(--dur) var(--ease);
}
.nav-toggle-bar::before,
.nav-toggle-bar::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:2px;
  background:currentColor;
  transition:transform var(--dur) var(--ease);
}
.nav-toggle-bar::before{top:-5px}
.nav-toggle-bar::after{top:5px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar::before{transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar::after{transform:translateY(-5px) rotate(-45deg)}
.nav-toggle-label{line-height:1}

/* ---------- 6. 页脚 ---------- */
.site-footer{
  position:relative;
  overflow:hidden;
  background:var(--ink-green);
  color:var(--leaf);
  padding-top:clamp(40px,6vw,80px);
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(156,201,168,.10) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(156,201,168,.10) 1px,transparent 1px);
  background-size:72px 72px;
  opacity:.75;
}
.footer-inner{
  position:relative;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gutter);
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(24px,3vw,40px) clamp(18px,2.4vw,36px);
}
.footer-brand{
  grid-column:1/-1;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 14px;
  padding-bottom:22px;
  border-bottom:1px solid rgba(156,201,168,.24);
}
.footer-brand-name{
  color:var(--warm);
  font-size:18px;
  font-weight:900;
  letter-spacing:-.01em;
}
.footer-brand-sub{
  font-size:12.5px;
  letter-spacing:.1em;
  color:var(--leaf);
  opacity:.85;
}
.footer-col{min-width:0}
.footer-title{
  margin-bottom:14px;
  font-size:12px;
  font-weight:800;
  letter-spacing:.16em;
  color:var(--gold);
}
.footer-list{
  display:flex;
  flex-direction:column;
  gap:10px;
}
.footer-list a,
.footer-list span{
  font-size:14px;
  line-height:1.6;
  color:var(--warm);
  opacity:.86;
  overflow-wrap:anywhere;
}
.footer-list a{
  display:inline-block;
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.footer-list a:hover{
  color:var(--gold);
  opacity:1;
  border-bottom-color:var(--gold);
}
.footer-contact span{opacity:.7;font-family:var(--font-mono);font-size:13px}
.footer-icp{
  margin-top:16px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.04em;
  color:var(--leaf);
}
.footer-base{
  position:relative;
  max-width:var(--wrap);
  margin:clamp(32px,4vw,56px) auto 0;
  padding:18px var(--gutter) 22px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 24px;
  border-top:1px solid rgba(156,201,168,.24);
}
.footer-copy{
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--leaf);
}
.footer-copy span{font-family:var(--font-mono)}
.footer-home{
  font-size:14px;
  font-weight:900;
  letter-spacing:.06em;
  color:var(--gold);
  padding-bottom:2px;
  border-bottom:1px solid var(--gold);
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-home:hover{color:var(--warm);border-bottom-color:var(--warm)}

/* ---------- 7. 滚动显现 ---------- */
@media (prefers-reduced-motion: no-preference){
  .js [data-reveal]{
    opacity:0;
    transform:translateY(12px);
    transition:opacity 220ms var(--ease),transform 220ms var(--ease);
  }
  .js [data-reveal].is-in{opacity:1;transform:none}
}

/* ---------- 8. 响应式 ---------- */
@media (max-width:1080px){
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .col-3,.col-4{grid-column:span 3}
  .col-5,.col-6,.col-7{grid-column:span 6}
  .col-8,.col-9{grid-column:span 6}
}

@media (max-width:920px){
  :root{--header-h:60px}

  .nav-toggle{display:inline-flex}

  .site-nav{
    position:fixed;
    top:0;
    right:0;
    height:100vh;
    height:100dvh;
    width:min(86vw,340px);
    margin-left:0;
    padding:calc(var(--header-h) + 22px) 24px 32px;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    background:var(--ink-green);
    color:var(--warm);
    overflow-y:auto;
    transform:translateX(100%);
    transition:transform 220ms var(--ease);
    box-shadow:-1px 0 0 rgba(224,165,38,.35);
  }
  .site-nav[data-open]{transform:translateX(0)}

  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .nav-list li+li{border-top:1px solid rgba(246,243,234,.14)}
  .nav-list a{
    display:block;
    padding:16px 2px;
    font-size:18px;
    font-weight:800;
    letter-spacing:.02em;
  }
  .nav-list a::after{display:none}
  .nav-list a[aria-current="page"],
  .site-header.is-solid .nav-list a[aria-current="page"]{color:var(--gold)}

  .nav-cta{
    margin-top:26px;
    width:100%;
    padding:14px;
    font-size:15px;
  }
  .site-header.is-solid .nav-cta{
    background:var(--gold);
    color:var(--ink);
    border-color:var(--gold);
  }

  .footer-inner{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:640px){
  .grid-12{grid-template-columns:minmax(0,1fr)}
  .col-3,.col-4,.col-5,.col-6,.col-7,.col-8,.col-9,.col-12{grid-column:span 1}
  .footer-inner{grid-template-columns:minmax(0,1fr)}
  .footer-base{flex-direction:column;align-items:flex-start}
  .display{transform:none}
}

/* ---------- 9. 减少动效 ---------- */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .card:hover{transform:none}
}