/* ============================================================
   狗万赛事｜观察哨 — 共享样式表 /assets/site.css
   夜场观察哨：炭黑与深墨绿铺底，荧光青 / 暖橙为信号色
   注意：.site-header 不可添加 transform / filter / backdrop-filter，
   否则内部 fixed 定位的 .rail 与 .frame 会失去视口定位。
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root{
  --ink:#111613;
  --deep:#0E2B24;
  --midnight:#0B3A3F;
  --cyan:#38F2D6;
  --orange:#FF8A3D;
  --lime:#B7FF5C;
  --silver:#C7CFCE;
  --steel:#7E8A8A;
  --wine:#6B1F2A;
  --indigo:#2A2A6B;
  --paper:#F2F7F5;
  --mist:#A7B6B2;
  --ok:#3DD68C;
  --warn:#FFC857;
  --err:#FF5A5F;

  --font-head:'Archivo Expanded','Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --font-body:'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --font-data:'JetBrains Mono','SFMono-Regular','Consolas',monospace;

  --rail:68px;
  --line:1px solid rgba(199,207,206,.2);
  --radius-a:20px 6px 20px 6px;
  --radius-b:12px 4px 12px 4px;
  --ease:cubic-bezier(.2,.7,.2,1);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:1rem;
  font-weight:400;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  background:
    radial-gradient(60vw 55vh at 84% 6%, rgba(56,242,214,.10), transparent 62%),
    radial-gradient(52vw 48vh at 6% 82%, rgba(255,138,61,.08), transparent 60%),
    linear-gradient(160deg,#0E2B24 0%,#111613 46%,#0B3A3F 100%);
}
img,svg,video{max-width:100%;display:block}
button,input{font:inherit;color:inherit}
ul,ol{margin:0}
[hidden]{display:none !important}
::selection{background:var(--cyan);color:#04140f}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:3px}

/* ---------- 3. 中文排版 ---------- */
h1,h2,h3,h4{
  font-family:var(--font-head);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.06;
  margin:0 0 .6em;
  color:var(--paper);
}
h1{font-size:clamp(3.2rem,8vw,7.5rem)}
h2{font-size:clamp(2rem,4vw,3.4rem)}
h3{font-size:1.35rem;line-height:1.35}
p{margin:0 0 1.1em}
a{color:var(--cyan);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:#7AF7E6}
strong{font-weight:700;color:var(--paper)}
.mono,[data-year]{font-family:var(--font-data);font-variant-numeric:tabular-nums}

/* ---------- 4. 布局容器 ---------- */
.shell{width:min(1240px,100% - 2 * clamp(20px,4vw,56px));margin-inline:auto}
.section{padding-block:clamp(40px,6vw,96px)}
.section__head{display:flex;flex-wrap:wrap;align-items:flex-end;gap:14px 24px;margin-bottom:clamp(20px,3vw,40px)}
.section__eyebrow{
  margin:0;font-family:var(--font-data);font-size:.74rem;letter-spacing:.24em;
  text-transform:uppercase;color:var(--cyan);
}
.section__title{margin:0}
.section__lead{max-width:58ch;margin:0;color:var(--mist);font-size:.98rem}
.grid{display:grid;gap:clamp(16px,2.4vw,32px)}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}
.prose{max-width:68ch}
.prose h2,.prose h3{margin-top:1.7em}
.prose ul,.prose ol{padding-left:1.2em;color:var(--mist)}
.prose li{margin-bottom:.4em}

/* ---------- 5. 面包屑 ---------- */
.breadcrumb{margin:clamp(18px,3vw,32px) 0}
.breadcrumb__list{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  list-style:none;padding:0;
  font-family:var(--font-data);font-size:.72rem;letter-spacing:.1em;color:var(--steel);
}
.breadcrumb__item{display:inline-flex;align-items:center;gap:10px}
.breadcrumb__item + .breadcrumb__item::before{content:"/";color:rgba(199,207,206,.35)}
.breadcrumb__link{color:var(--mist)}
.breadcrumb__link:hover{color:var(--cyan)}
.breadcrumb__current{color:var(--paper)}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:13px 22px;border-radius:var(--radius-b);
  border:1px solid transparent;cursor:pointer;
  font-family:var(--font-data);font-size:.8rem;letter-spacing:.12em;
  text-decoration:none;
  transition:transform .22s var(--ease),background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.btn:hover{transform:translateY(-2px);text-decoration:none}
.btn--primary{background:var(--cyan);color:#062019;border-color:var(--cyan)}
.btn--primary:hover{background:#5AF7E0;color:#062019}
.btn--signal{background:var(--orange);color:#241005;border-color:var(--orange)}
.btn--signal:hover{background:#FFA166;color:#241005}
.btn--ghost{background:rgba(17,22,19,.4);color:var(--paper);border-color:rgba(199,207,206,.4)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}

/* ---------- 7. 卡片 / 标签 / 数据 / 图片容器 ---------- */
.card{
  position:relative;padding:clamp(18px,2.4vw,28px);
  border:var(--line);border-radius:var(--radius-a);
  background:linear-gradient(160deg,rgba(11,58,63,.5),rgba(17,22,19,.62));
}
.card__head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}
.card__title{margin:0;font-family:var(--font-head);font-weight:800;font-size:1.18rem;letter-spacing:-.01em}
.card__body{margin:0;color:var(--mist);font-size:.95rem}
.card__meta{font-family:var(--font-data);font-size:.72rem;letter-spacing:.08em;color:var(--steel)}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:999px;
  border:1px solid currentColor;
  font-family:var(--font-data);font-size:.68rem;letter-spacing:.12em;
  color:var(--cyan);background:rgba(56,242,214,.08);
}
.tag--orange{color:var(--orange);background:rgba(255,138,61,.1);border-color:rgba(255,138,61,.55)}
.tag--lime{color:var(--lime);background:rgba(183,255,92,.1);border-color:rgba(183,255,92,.5)}
.tag--wine{color:#F0C3C9;background:rgba(107,31,42,.55);border-color:rgba(107,31,42,.95)}
.tag--indigo{color:#C7C9FA;background:rgba(42,42,107,.55);border-color:rgba(42,42,107,.95)}

.data{display:flex;flex-direction:column;gap:4px}
.data__value{
  font-family:var(--font-data);font-variant-numeric:tabular-nums;
  font-size:clamp(1.4rem,2.4vw,2rem);line-height:1.1;color:var(--paper);
}
.data__label{font-family:var(--font-data);font-size:.7rem;letter-spacing:.16em;color:var(--mist)}

.media{
  position:relative;overflow:hidden;isolation:isolate;
  aspect-ratio:16/9;
  border:var(--line);border-radius:var(--radius-a);
  background:linear-gradient(150deg,#0B3A3F 0%,#111613 58%,#0E2B24 100%);
}
.media::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(115deg,rgba(199,207,206,.06) 0 1px,transparent 1px 9px);
}
.media img{width:100%;height:100%;object-fit:cover}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:4/5}
.media--square{aspect-ratio:1/1}
.media__caption{
  position:absolute;left:0;right:0;bottom:0;z-index:2;
  padding:16px;
  background:linear-gradient(0deg,rgba(17,22,19,.9),transparent);
  font-family:var(--font-data);font-size:.72rem;letter-spacing:.08em;color:var(--mist);
}

/* ---------- 8. 滚动显现 ---------- */
@media (scripting: enabled){
  [data-reveal]{
    opacity:0;transform:translateY(22px);
    transition:opacity .7s var(--ease),transform .7s var(--ease);
    transition-delay:var(--reveal-delay,0ms);
  }
  [data-reveal].is-in{opacity:1;transform:none}
}

/* ---------- 9. 跳过链接 ---------- */
.skip-link{
  position:absolute;left:16px;top:14px;z-index:200;
  transform:translateY(-180%);
  padding:10px 16px;border-radius:8px;
  background:var(--cyan);color:#062019;
  font-family:var(--font-data);font-size:.78rem;letter-spacing:.08em;
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:translateY(0);color:#062019;text-decoration:none}

/* ---------- 10. 侧边品牌轨道 ---------- */
.rail{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail);z-index:78;
  display:none;flex-direction:column;align-items:center;justify-content:space-between;
  padding:20px 0;
  background:linear-gradient(180deg,#0B3A3F 0%,#0E2B24 44%,#111613 100%);
  border-right:1px solid rgba(199,207,206,.18);
}
.rail__label{
  writing-mode:vertical-rl;
  font-family:var(--font-data);font-size:.68rem;letter-spacing:.34em;
  color:var(--mist);text-transform:uppercase;
}
.rail__scale{
  position:absolute;top:15%;bottom:15%;right:9px;width:10px;
  background:repeating-linear-gradient(180deg,rgba(199,207,206,.28) 0 1px,transparent 1px 16px);
}
.rail__track{
  position:absolute;top:15%;bottom:15%;left:50%;width:2px;
  transform:translateX(-50%);
  background:rgba(199,207,206,.16);border-radius:2px;overflow:hidden;
}
.rail__fill{
  display:block;width:100%;height:0%;
  background:linear-gradient(180deg,var(--cyan),var(--orange));
  transition:height .12s linear;
}
.rail__count{font-family:var(--font-data);font-size:.72rem;letter-spacing:.08em;color:var(--cyan)}

/* ---------- 11. 右侧框景刻度 ---------- */
.frame{position:fixed;inset:0;z-index:44;display:none;pointer-events:none}
.frame::before{
  content:"";position:absolute;top:12vh;bottom:10vh;right:12px;width:1px;
  background:linear-gradient(180deg,transparent,rgba(199,207,206,.28) 14%,rgba(199,207,206,.28) 86%,transparent);
}
.frame__tick{position:absolute;right:12px;width:14px;height:1px;background:rgba(199,207,206,.3)}
.frame__tick--a{top:26%}
.frame__tick--b{top:62%;width:22px;background:rgba(255,138,61,.55)}

/* ---------- 12. 页头 ---------- */
.site-header{
  position:sticky;top:0;z-index:70;
  background:linear-gradient(180deg,rgba(11,58,63,.98) 0%,rgba(14,43,36,.98) 56%,rgba(17,22,19,.98) 100%);
  border-bottom:1px solid rgba(199,207,206,.2);
  box-shadow:0 1px 0 rgba(56,242,214,.22),0 20px 42px -34px rgba(0,0,0,.95);
  transition:box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.site-header[data-scrolled]{border-bottom-color:rgba(56,242,214,.45);box-shadow:0 1px 0 rgba(56,242,214,.4),0 24px 48px -30px rgba(0,0,0,.98)}
.header-rail{
  position:relative;width:100%;max-width:1560px;margin-inline:auto;
  padding:12px clamp(16px,3vw,40px);
  display:flex;align-items:center;flex-wrap:wrap;gap:clamp(10px,2vw,26px);
}

/* 品牌 */
.brand{
  order:1;flex:0 1 auto;min-width:0;
  display:inline-flex;align-items:center;gap:12px;
  color:var(--paper);text-decoration:none;
}
.brand:hover{color:var(--paper);text-decoration:none}
.brand__badge{
  flex:0 0 38px;width:38px;height:38px;
  display:grid;place-items:center;
  border:1px solid rgba(56,242,214,.5);border-radius:12px 4px 12px 4px;
  background:radial-gradient(circle at 30% 25%,rgba(56,242,214,.24),rgba(11,58,63,.65));
  font-family:var(--font-head);font-weight:800;font-size:.95rem;color:var(--cyan);
}
.brand__text{display:flex;flex-direction:column;min-width:0}
.brand__mark{font-family:var(--font-head);font-weight:800;font-size:1.02rem;letter-spacing:-.01em;white-space:nowrap}
.brand__tagline{font-family:var(--font-data);font-size:.66rem;letter-spacing:.16em;color:var(--mist);white-space:nowrap}

/* 主导航 */
.nav{order:2;flex:1 1 auto;display:flex;justify-content:center;min-width:0}
.nav__list{display:flex;align-items:center;gap:clamp(6px,1.4vw,20px);list-style:none;padding:0}
.nav__item{display:block}
.nav__link{
  position:relative;display:inline-block;padding:10px 4px;
  font-size:.9rem;letter-spacing:.08em;color:var(--mist);text-decoration:none;
  transition:color .25s var(--ease);
}
.nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;
  background:var(--cyan);transform:scaleX(0);transform-origin:left;
  transition:transform .3s var(--ease);
}
.nav__link:hover{color:var(--paper);text-decoration:none}
.nav__link:hover::after{transform:scaleX(1)}
.nav__link[aria-current="page"]{color:var(--paper)}
.nav__link[aria-current="page"]::after{background:var(--orange);transform:scaleX(1)}

/* 工具组 */
.header-utility{order:3;flex:0 0 auto;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.util{
  padding:8px 12px;border-radius:999px;cursor:pointer;
  border:1px solid rgba(199,207,206,.28);
  background:rgba(11,58,63,.4);color:var(--mist);
  font-family:var(--font-data);font-size:.72rem;letter-spacing:.1em;
  transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.util:hover{color:var(--paper);border-color:rgba(56,242,214,.6);background:rgba(56,242,214,.1)}
.util[aria-pressed="true"]{background:var(--orange);border-color:var(--orange);color:#241005}
.util--static{cursor:default;color:var(--lime);border-color:rgba(183,255,92,.35);background:rgba(183,255,92,.07)}
.util--static:hover{color:var(--lime);border-color:rgba(183,255,92,.55);background:rgba(183,255,92,.07)}

/* 移动按钮 */
.nav-toggle{
  order:4;display:none;align-items:center;gap:10px;
  padding:9px 14px;border-radius:10px 3px 10px 3px;cursor:pointer;
  border:1px solid rgba(56,242,214,.45);background:rgba(11,58,63,.6);color:var(--paper);
  font-family:var(--font-data);font-size:.74rem;letter-spacing:.14em;
}
.nav-toggle__bars{position:relative;display:block;width:18px;height:2px;background:var(--cyan);transition:background .2s var(--ease)}
.nav-toggle__bars::before,.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--cyan);
  transition:transform .25s var(--ease);
}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-6px) rotate(-45deg)}
.nav-toggle__text{white-space:nowrap}

/* 检索面板 */
.search-panel{
  position:absolute;left:0;right:0;top:100%;
  background:linear-gradient(180deg,rgba(11,58,63,.99),rgba(14,43,36,.99));
  border-bottom:1px solid rgba(56,242,214,.3);
  box-shadow:0 30px 46px -34px rgba(0,0,0,.98);
}
.search-panel__inner{
  max-width:1560px;margin-inline:auto;
  padding:16px clamp(16px,3vw,40px) 20px;
  display:grid;grid-template-columns:auto minmax(0,1fr);gap:10px 16px;align-items:center;
}
.search-panel__label{font-family:var(--font-data);font-size:.72rem;letter-spacing:.14em;color:var(--cyan);white-space:nowrap}
.search-panel__input{
  width:100%;padding:11px 14px;border-radius:10px;
  border:1px solid rgba(199,207,206,.3);background:rgba(17,22,19,.65);color:var(--paper);
  font-family:var(--font-body);font-size:.95rem;
}
.search-panel__input::placeholder{color:var(--steel)}
.search-panel__hint{grid-column:1/-1;margin:0;font-family:var(--font-data);font-size:.72rem;letter-spacing:.06em;color:var(--mist)}

/* ---------- 13. 页脚 ---------- */
.site-footer{
  position:relative;overflow:hidden;
  margin-top:clamp(48px,7vw,110px);
  background:linear-gradient(180deg,#0E2B24 0%,#0B3A3F 58%,#111613 100%);
  border-top:1px solid rgba(56,242,214,.28);
  color:var(--mist);
}
.footer__glow{
  position:absolute;left:-10%;right:-10%;top:-20%;height:64%;pointer-events:none;
  background:
    radial-gradient(45vw 30vh at 20% 0%,rgba(56,242,214,.14),transparent 66%),
    radial-gradient(40vw 26vh at 84% 12%,rgba(255,138,61,.12),transparent 68%);
}
.footer__inner{
  position:relative;
  max-width:1560px;margin-inline:auto;
  padding:clamp(36px,5vw,72px) clamp(20px,3vw,48px) 24px;
  display:grid;gap:clamp(26px,4vw,54px);
  grid-template-columns:minmax(0,1.1fr) minmax(0,1fr) minmax(0,1.15fr);
}
.footer__brand .brand{margin-bottom:16px}
.footer__mark{font-family:var(--font-head);font-weight:800;font-size:1.22rem;margin:0 0 6px;color:var(--paper)}
.footer__tagline{font-family:var(--font-data);font-size:.7rem;letter-spacing:.16em;color:var(--cyan);margin:0 0 18px}
.footer__prompt{margin:0;max-width:34ch;font-size:.95rem;color:var(--mist)}
.footer__nav{min-width:0}
.footer__list{list-style:none;padding:0;columns:2;column-gap:clamp(16px,2vw,30px)}
.footer__list li{padding:7px 0;break-inside:avoid}
.footer__link{display:inline-block;font-size:.92rem;color:var(--mist)}
.footer__link:hover{color:var(--cyan)}
.footer__meta{min-width:0}
.footer__contact{
  margin:0 0 14px;
  font-family:var(--font-data);font-size:.75rem;line-height:2;letter-spacing:.02em;
  color:var(--mist);word-break:break-word;
}
.footer__note{margin:0;font-size:.82rem;color:var(--steel);max-width:40ch}
.to-top{
  display:inline-flex;align-items:center;gap:8px;margin-top:16px;
  padding:10px 16px;border-radius:999px;cursor:pointer;
  border:1px solid rgba(56,242,214,.4);background:rgba(17,22,19,.55);color:var(--cyan);
  font-family:var(--font-data);font-size:.72rem;letter-spacing:.14em;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.to-top:hover{background:rgba(56,242,214,.14);color:#7AF7E6}
.footer__legal{
  grid-column:1/-1;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 26px;
  padding-top:20px;border-top:1px solid rgba(199,207,206,.18);
  font-family:var(--font-data);font-size:.72rem;letter-spacing:.08em;color:var(--steel);
}
.footer__icp{color:var(--silver)}
.footer__copy{margin:0}

/* ---------- 14. 主内容锚点 ---------- */
#main-content{display:block;scroll-margin-top:96px}

/* ---------- 15. 响应式 ---------- */
@media (min-width:1024px){
  body{padding-left:var(--rail)}
  .rail{display:flex}
  .frame{display:block}
  .skip-link{left:calc(var(--rail) + 18px)}
}

@media (max-width:1200px){
  .brand__tagline{display:none}
}

@media (max-width:980px){
  .footer__inner{grid-template-columns:1fr;gap:clamp(22px,5vw,38px)}
  .footer__list{columns:1}
}

@media (max-width:920px){
  .nav-toggle{display:inline-flex}
  .brand{flex:1 1 auto;order:1}
  .nav-toggle{order:2}
  .header-utility{order:3;flex:1 1 100%;overflow-x:auto;padding-bottom:2px}
  .nav{
    order:4;
    position:absolute;left:0;right:0;top:100%;
    display:none;flex-direction:column;justify-content:flex-start;
    padding:10px clamp(16px,4vw,28px) 20px;
    background:linear-gradient(180deg,rgba(11,58,63,.99),rgba(17,22,19,.99));
    border-bottom:1px solid rgba(199,207,206,.22);
    box-shadow:0 30px 50px -34px rgba(0,0,0,.98);
  }
  .nav[data-open]{display:flex;animation:drawer-in .3s var(--ease)}
  .nav__list{flex-direction:column;align-items:stretch;gap:0;width:100%}
  .nav__item{border-bottom:1px solid rgba(199,207,206,.12)}
  .nav__link{display:block;padding:14px 4px;font-size:1.04rem;color:var(--paper)}
  .nav__link::after{bottom:0;height:2px}
  .nav__link[aria-current="page"]::after{transform:scaleX(1)}
  .search-panel__inner{grid-template-columns:1fr}
}

@media (max-width:600px){
  .header-rail{padding:10px 16px 12px;gap:10px}
  .brand__badge{width:34px;height:34px;flex-basis:34px;font-size:.86rem}
  .brand__mark{font-size:.94rem;white-space:normal}
  .util{font-size:.68rem;padding:7px 10px}
  .footer__inner{padding-inline:18px}
  .footer__legal{justify-content:flex-start}
}

@keyframes drawer-in{
  from{opacity:0;transform:translateY(-10px)}
  to{opacity:1;transform:none}
}

/* ---------- 16. 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;
  }
  [data-reveal]{opacity:1 !important;transform:none !important}
  .rail__fill{transition:none}
}