/* =========================================================
   江南赛事 · 共享样式表  /assets/site.css
   夜潮青黑底 · 主场红强调 · 非对称编辑部栅格
   ========================================================= */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --c-ink:#06171A;          /* 夜潮青黑 */
  --c-deep:#0B2A2E;         /* 深青 */
  --c-moss:#123A38;         /* 墨绿 */
  --c-slate:#2E4C55;        /* 烟灰蓝 */
  --c-tide:#4F8A8B;         /* 潮线青 */
  --c-mist:#9FC4C6;         /* 水波浅蓝 */
  --c-foam:#F3F7F5;         /* 潮头白 */
  --c-home:#C8402F;         /* 主场红 */
  --c-board:#E4D9C3;        /* 记分牌米 */

  --bg-page:var(--c-deep);
  --bg-sunken:var(--c-ink);
  --bg-card:rgba(11,42,46,.72);
  --bg-card-hover:rgba(18,58,56,.86);
  --bg-panel:linear-gradient(180deg,rgba(18,58,56,.88),rgba(11,42,46,.96));

  --text-main:var(--c-foam);
  --text-soft:rgba(159,196,198,.86);
  --text-faint:rgba(159,196,198,.58);

  --border-print:rgba(79,138,139,.38);
  --border-strong:rgba(79,138,139,.78);

  --font-display:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Heiti SC",system-ui,sans-serif;
  --font-serif:"Songti SC","Noto Serif CJK SC","Source Han Serif SC",Georgia,"SimSun",serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular","JetBrains Mono",Menlo,Consolas,"Courier New",monospace;

  --shell:1320px;
  --gutter:clamp(1rem,3.2vw,2.75rem);
  --rail-left:240px;
  --rail-right:260px;

  --radius:2px;
  --shadow-card:0 20px 44px -30px rgba(0,0,0,.95);
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:200ms;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:5.5rem;
}
body{
  margin:0;
  min-height:100vh;
  background:var(--bg-page);
  color:var(--text-main);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.72;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img,svg,video{display:block;max-width:100%;}
button{font:inherit;color:inherit;background:none;border:0;}
a{color:inherit;}
table{border-collapse:collapse;width:100%;}
hr{border:0;}
html.nav-open{overflow:hidden;}

/* ---------- 3. 焦点可见 ---------- */
:focus-visible{
  outline:2px solid var(--c-mist);
  outline-offset:3px;
  border-radius:1px;
}
.skip-link:focus-visible{outline-color:var(--c-home);}

/* ---------- 4. 跳转链接 ---------- */
.skip-link{
  position:fixed;
  left:1rem;
  top:-4.5rem;
  z-index:200;
  padding:.6rem 1.05rem;
  background:var(--c-foam);
  color:var(--c-ink);
  font-size:.875rem;
  font-weight:700;
  letter-spacing:.06em;
  text-decoration:none;
  border-radius:var(--radius);
  transition:top var(--dur) var(--ease);
}
.skip-link:focus{top:.75rem;}

/* ---------- 5. 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:linear-gradient(180deg,rgba(6,23,26,.97),rgba(11,42,46,.93));
  border-bottom:1px solid var(--border-print);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
}
.header-inner{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:.7rem var(--gutter);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:clamp(.75rem,3vw,2.5rem);
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:.7rem;
  text-decoration:none;
  color:inherit;
}
.brand-mark{
  position:relative;
  flex:none;
  width:34px;
  height:34px;
  background:linear-gradient(152deg,var(--c-tide),var(--c-moss) 52%,var(--c-home));
  border:1px solid var(--border-strong);
  clip-path:polygon(0 0,100% 0,100% 62%,50% 100%,0 62%);
  transition:border-color var(--dur) var(--ease);
}
.brand-mark::after{
  content:"";
  position:absolute;
  left:-3px;
  right:-3px;
  top:56%;
  height:2px;
  background:var(--c-foam);
  opacity:.85;
  transform:rotate(-14deg);
}
.brand:hover .brand-mark{border-color:var(--c-mist);}
.brand-text{display:flex;flex-direction:column;line-height:1.12;}
.brand-name{
  font-family:var(--font-display);
  font-size:1.125rem;
  font-weight:900;
  letter-spacing:-.01em;
  color:var(--c-foam);
}
.brand-tagline{
  margin-top:.18rem;
  font-family:var(--font-serif);
  font-size:.6875rem;
  letter-spacing:.26em;
  color:var(--c-tide);
}

/* 主导航 */
.site-nav{display:flex;justify-content:flex-end;}
.nav-list{
  display:flex;
  align-items:center;
  gap:clamp(.2rem,1.4vw,1rem);
}
.nav-item{display:block;}
.nav-link{
  position:relative;
  display:inline-block;
  padding:.5rem .35rem;
  font-size:.8125rem;
  letter-spacing:.09em;
  color:var(--text-soft);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.nav-link:hover{color:var(--c-foam);border-bottom-color:var(--c-tide);}
.nav-link[aria-current="page"]{
  color:var(--c-foam);
  border-bottom-color:var(--c-home);
}

/* 抽屉开关 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:.5rem;
  padding:.5rem .72rem;
  border:1px solid var(--border-strong);
  border-radius:var(--radius);
  color:var(--c-foam);
  font-size:.75rem;
  letter-spacing:.16em;
  cursor:pointer;
  transition:border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--c-mist);background:rgba(79,138,139,.16);}
.nav-toggle-icon{display:inline-flex;flex-direction:column;gap:3px;width:16px;}
.nav-toggle-icon span{display:block;height:1.5px;background:currentColor;}
.nav-toggle-icon span:nth-child(2){width:68%;}
.nav-toggle-icon span:nth-child(3){width:86%;}
.nav-toggle-label{white-space:nowrap;}

/* ---------- 6. 页脚 ---------- */
.site-footer{
  margin-top:clamp(3.5rem,9vw,7rem);
  background:linear-gradient(180deg,rgba(11,42,46,.4),rgba(6,23,26,1) 58%),var(--c-ink);
  border-top:1px solid var(--border-strong);
  color:var(--text-soft);
}
.footer-inner{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:clamp(2rem,5vw,3.25rem) var(--gutter) clamp(1.5rem,3vw,2.25rem);
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:clamp(1.75rem,4vw,2.5rem);
}
.footer-brand{display:flex;flex-direction:column;gap:.95rem;}
.footer-note{
  max-width:32em;
  font-family:var(--font-serif);
  font-size:.875rem;
  line-height:1.85;
  color:var(--text-faint);
}
.footer-col{min-width:0;}
.footer-heading{
  margin-bottom:.85rem;
  padding-bottom:.55rem;
  border-bottom:1px solid var(--border-print);
  font-size:.6875rem;
  font-weight:700;
  letter-spacing:.22em;
  color:var(--c-board);
}
.footer-list{display:flex;flex-direction:column;gap:.55rem;}
.footer-list a{
  font-size:.875rem;
  color:var(--text-soft);
  text-decoration:none;
  transition:color var(--dur) var(--ease);
}
.footer-list a:hover{color:var(--c-foam);}
.footer-list--contact li{display:flex;flex-direction:column;gap:.12rem;}
.footer-key{
  font-size:.6875rem;
  letter-spacing:.16em;
  color:var(--c-tide);
}
.footer-value{
  font-size:.875rem;
  line-height:1.6;
  color:var(--c-foam);
  overflow-wrap:anywhere;
}
.footer-base{border-top:1px solid var(--border-print);}
.footer-base-inner{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:1rem var(--gutter) 1.6rem;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:.45rem 1.5rem;
  font-size:.75rem;
  letter-spacing:.08em;
  color:var(--text-faint);
}
.footer-legal,.footer-copy{margin:0;}

/* ---------- 7. 布局容器 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.grid-editorial{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:clamp(1.5rem,3vw,2.5rem);
  align-items:start;
}

/* ---------- 8. 章节题头 ---------- */
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:.6rem 1.25rem;
  padding-bottom:.85rem;
  border-bottom:1px solid var(--border-print);
}
.section-kicker{
  font-family:var(--font-serif);
  font-size:.8125rem;
  letter-spacing:.24em;
  color:var(--c-tide);
}
.section-title{
  font-family:var(--font-display);
  font-size:clamp(1.5rem,4vw,2rem);
  font-weight:900;
  line-height:1.1;
  letter-spacing:-.02em;
  color:var(--c-foam);
}
.eyebrow{
  font-size:.6875rem;
  font-weight:700;
  letter-spacing:.2em;
  color:var(--c-mist);
}
.rule-tide{
  height:1px;
  border:0;
  background:linear-gradient(90deg,transparent,var(--c-tide) 18%,rgba(200,64,47,.6) 62%,transparent);
  opacity:.72;
}

/* ---------- 9. 标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  padding:.26rem .55rem;
  border:1px solid var(--border-print);
  border-radius:var(--radius);
  background:rgba(79,138,139,.12);
  color:var(--c-mist);
  font-size:.6875rem;
  font-weight:700;
  letter-spacing:.18em;
  white-space:nowrap;
}
.tag--home{
  border-color:rgba(200,64,47,.62);
  background:rgba(200,64,47,.16);
  color:#F0C6BD;
}
.tag--board{
  border-color:rgba(228,217,195,.42);
  background:rgba(228,217,195,.1);
  color:var(--c-board);
}

/* ---------- 10. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  padding:.72rem 1.25rem;
  border:1px solid var(--border-strong);
  border-radius:var(--radius);
  background:rgba(79,138,139,.14);
  color:var(--c-foam);
  font-size:.875rem;
  font-weight:600;
  letter-spacing:.06em;
  text-decoration:none;
  transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn:hover{
  background:rgba(79,138,139,.28);
  border-color:var(--c-mist);
  transform:translateY(-1px);
}
.btn--primary{
  background:var(--c-home);
  border-color:var(--c-home);
  color:#FFF2EF;
}
.btn--primary:hover{
  background:#D5533F;
  border-color:#E67C6A;
}
.btn--ghost{background:transparent;}
.btn--ghost:hover{background:rgba(79,138,139,.14);}

/* ---------- 11. 面包屑 ---------- */
.breadcrumb{border-bottom:1px solid var(--border-print);}
.breadcrumb-list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.45rem;
  padding:.85rem 0;
  font-size:.75rem;
  letter-spacing:.1em;
  color:var(--text-faint);
}
.breadcrumb-item{display:inline-flex;align-items:center;gap:.45rem;}
.breadcrumb-item + .breadcrumb-item::before{
  content:"/";
  color:var(--c-tide);
}
.breadcrumb-link{color:var(--c-mist);text-decoration:none;transition:color var(--dur) var(--ease);}
.breadcrumb-link:hover{color:var(--c-foam);}
.breadcrumb-current{color:var(--c-board);}

/* ---------- 12. 正文 ---------- */
.prose{
  max-width:38em;
  font-size:1.0625rem;
  line-height:1.78;
  color:rgba(243,247,245,.86);
}
.prose > * + *{margin-top:1.1em;}
.prose h2{
  margin-top:2.3em;
  font-family:var(--font-display);
  font-size:clamp(1.45rem,3vw,1.85rem);
  font-weight:900;
  line-height:1.2;
  letter-spacing:-.01em;
  color:var(--c-foam);
}
.prose h3{
  margin-top:1.8em;
  font-size:1.125rem;
  font-weight:700;
  color:var(--c-foam);
}
.prose ul > li{
  position:relative;
  padding-left:1.15em;
}
.prose ul > li + li{margin-top:.5em;}
.prose ul > li::before{
  content:"";
  position:absolute;
  left:0;
  top:.74em;
  width:.6rem;
  height:1px;
  background:var(--c-tide);
}
.prose ol{counter-reset:prose-ol;}
.prose ol > li{
  position:relative;
  padding-left:1.6em;
  counter-increment:prose-ol;
}
.prose ol > li + li{margin-top:.5em;}
.prose ol > li::before{
  content:counter(prose-ol,decimal-leading-zero);
  position:absolute;
  left:0;
  font-family:var(--font-mono);
  font-size:.8125rem;
  color:var(--c-tide);
}
.prose blockquote{
  padding-left:1.1rem;
  border-left:2px solid var(--c-home);
  font-family:var(--font-serif);
  font-size:1rem;
  letter-spacing:.02em;
  color:var(--c-board);
}
.prose code{
  padding:.1em .35em;
  border-radius:var(--radius);
  background:rgba(79,138,139,.18);
  font-family:var(--font-mono);
  font-size:.9em;
}
.prose a{
  color:var(--c-tide);
  text-decoration:none;
  border-bottom:1px solid currentColor;
  transition:color var(--dur) var(--ease);
}
.prose a:hover{color:var(--c-foam);}

/* ---------- 13. 面板与卡片 ---------- */
.panel{
  padding:clamp(1rem,2.4vw,1.6rem);
  border:1px solid var(--border-print);
  border-radius:var(--radius);
  background:var(--bg-panel);
  box-shadow:var(--shadow-card);
}
.card{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:.7rem;
  padding:clamp(1rem,2.2vw,1.35rem);
  border:1px solid var(--border-print);
  border-radius:var(--radius);
  background:var(--bg-card);
  box-shadow:var(--shadow-card);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.card:hover{
  transform:translateY(-3px);
  border-color:var(--border-strong);
  background:var(--bg-card-hover);
}
.card__meta{
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.08em;
  color:var(--c-tide);
}
.card__title{
  font-family:var(--font-display);
  font-size:1.125rem;
  font-weight:800;
  line-height:1.36;
  letter-spacing:-.01em;
  color:var(--c-foam);
}
.card__text{
  font-size:.9375rem;
  line-height:1.72;
  color:rgba(243,247,245,.76);
}

/* ---------- 14. 图片容器 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  border:1px solid var(--border-print);
  border-radius:var(--radius);
  background:linear-gradient(150deg,rgba(79,138,139,.24),rgba(6,23,26,.92) 62%),var(--c-moss);
}
.media-frame > img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--wide{aspect-ratio:16/9;}
.media-frame--square{aspect-ratio:1/1;}
.media-frame--portrait{aspect-ratio:4/5;}
.media-frame--tall{aspect-ratio:3/4;}
.media-frame__caption{
  position:absolute;
  inset:auto 0 0 0;
  padding:.6rem .75rem;
  font-size:.6875rem;
  letter-spacing:.12em;
  color:var(--c-mist);
  background:linear-gradient(0deg,rgba(6,23,26,.94),rgba(6,23,26,0));
}

/* ---------- 15. 工具类 ---------- */
.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.04em;
}

/* ---------- 16. 阅读进度条 ---------- */
.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  z-index:90;
  width:100%;
  height:2px;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--c-tide),var(--c-home));
  pointer-events:none;
}

/* ---------- 17. 滚动显现 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity 420ms var(--ease),transform 420ms var(--ease);
}
[data-reveal][data-revealed="true"]{
  opacity:1;
  transform:none;
}

/* ---------- 18. 响应式：平板 ---------- */
@media (min-width:640px){
  .footer-inner{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (min-width:768px){
  .media-frame--wide{aspect-ratio:21/9;}
}

/* ---------- 19. 响应式：桌面栅格 ---------- */
@media (min-width:1024px){
  .grid-editorial{
    grid-template-columns:var(--rail-left) minmax(0,1fr) var(--rail-right);
    gap:clamp(1.75rem,3vw,3rem);
  }
  .footer-inner{grid-template-columns:1.35fr .9fr .9fr 1.15fr;}
}

/* ---------- 20. 响应式：移动抽屉 ---------- */
@media (max-width:880px){
  .nav-toggle{display:inline-flex;}
  .header-inner{padding-block:.6rem;}

  .site-nav{
    position:fixed;
    inset:0 0 0 auto;
    z-index:70;
    width:min(86vw,360px);
    padding:5.25rem var(--gutter) 2.5rem;
    background:linear-gradient(180deg,rgba(11,42,46,.99),rgba(6,23,26,1) 76%);
    border-left:1px solid var(--border-strong);
    overflow-y:auto;
    transform:translateX(103%);
    transition:transform 260ms var(--ease);
  }
  .site-nav[data-open="true"]{transform:translateX(0);}
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .nav-item{border-bottom:1px solid var(--border-print);}
  .nav-item:first-child{border-top:1px solid var(--border-print);}
  .nav-link{
    display:block;
    padding:.95rem .25rem;
    font-size:1rem;
    letter-spacing:.06em;
    border-bottom:0;
  }
  .nav-link[aria-current="page"]{
    padding-left:.75rem;
    border-left:2px solid var(--c-home);
  }
  .nav-open body::after{
    content:"";
    position:fixed;
    inset:0;
    z-index:60;
    background:rgba(6,23,26,.66);
  }
}

/* ---------- 21. 响应式：手机 ---------- */
@media (max-width:560px){
  body{font-size:16px;}
  .header-inner{gap:.5rem;}
  .brand-tagline{display:none;}
  .brand-mark{width:28px;height:28px;}
  .footer-base-inner{justify-content:flex-start;}
  .prose{max-width:none;}
}

/* ---------- 22. 减弱动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  [data-reveal]{
    opacity:1 !important;
    transform:none !important;
  }
  .card:hover,
  .btn:hover{transform:none;}
  .scroll-progress{display:none;}
}