/* =========================================================
   凤凰体育 · phoenix-win-fenghuang.com.cn
   /assets/site.css — reset / 变量 / 中文排版 / 头部 / 页脚 / 基础组件
   ========================================================= */

/* ---------- 1. reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
a{color:inherit;text-decoration:none}
[id]{scroll-margin-top:9.5rem}
:focus-visible{outline:2px solid var(--ember-500);outline-offset:2px;border-radius:3px}

/* ---------- 2. 变量 ---------- */
:root{
  --void-black:#101010;
  --char-800:#1A1917;
  --char-600:#2A2825;
  --ember-500:#E4581E;
  --ember-300:#F08A5A;
  --amber-400:#F7B733;
  --data-blue:#3F7EA8;
  --data-blue-deep:#24506B;
  --frost-100:#EDEFF0;
  --frost-400:#C3CACE;
  --steel-500:#8B949A;
  --sand-100:#F4EFE8;

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

  --shell:1240px;
  --gutter:clamp(1rem,4vw,2.5rem);
  --radius-s:6px;
  --radius-m:10px;
  --radius-l:14px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --sticky-top:9.5rem;
}

/* ---------- 3. 基础与中文排版 ---------- */
body{
  background:var(--void-black);
  color:var(--frost-400);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  min-height:100vh;
  overflow-x:hidden;
}
h1,h2,h3,h4{color:var(--frost-100);font-weight:800;line-height:1.2;letter-spacing:.005em}
strong{color:var(--frost-100);font-weight:700}

.h-display{
  font-size:clamp(2.2rem,7vw,4.5rem);
  line-height:.98;
  font-weight:900;
  letter-spacing:-.03em;
  color:var(--frost-100);
  transform:scaleX(.92);
  transform-origin:left center;
  max-width:14em;
}
.h-sec{
  font-size:clamp(1.125rem,2.2vw,1.5rem);
  display:flex;
  align-items:baseline;
  gap:.6rem;
}
.h-sec::before{
  content:"";
  flex:none;
  width:4px;
  height:1em;
  background:var(--ember-500);
  transform:translateY(.08em);
}
.lede{font-size:1.0625rem;color:var(--frost-400);max-width:34em}
.caption{font-size:.8125rem;line-height:1.6;color:var(--steel-500);letter-spacing:.02em}
.mono,.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.num{color:var(--frost-100)}
.num--key{color:var(--amber-400);font-weight:700}

/* ---------- 4. 布局工具 ---------- */
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:clamp(2rem,6vw,4rem)}
.section__head{
  display:flex;align-items:baseline;gap:1rem;
  padding-bottom:.75rem;margin-bottom:clamp(1rem,3vw,1.75rem);
  border-bottom:1px solid var(--char-600);
}
.section__index{
  font-family:var(--font-mono);font-size:.75rem;letter-spacing:.18em;
  color:var(--ember-500);white-space:nowrap;
}
.rule{height:1px;border:0;background:linear-gradient(90deg,var(--char-600),rgba(42,40,37,0))}
.stack>*+*{margin-top:1rem}
.stack--lg>*+*{margin-top:clamp(1.5rem,4vw,2.5rem)}
.grid{display:grid;gap:clamp(1rem,2vw,1.5rem)}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.grid--cards{grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}
.split{display:grid;grid-template-columns:minmax(220px,320px) minmax(0,1fr);gap:clamp(1.5rem,4vw,3rem)}
.split__aside{position:sticky;top:var(--sticky-top);align-self:start}
.split__main{min-width:0}

/* ---------- 5. 按钮与标签 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.5rem;
  padding:.7rem 1.15rem;border-radius:var(--radius-s);
  border:1px solid var(--char-600);color:var(--frost-400);
  font-size:.9375rem;font-weight:600;
  transition:border-color .18s var(--ease),color .18s var(--ease),background-color .18s var(--ease);
}
.btn:hover{border-color:var(--ember-500);color:var(--frost-100)}
.btn--ember{background:var(--ember-500);border-color:var(--ember-500);color:#12100E}
.btn--ember:hover{background:var(--ember-300);border-color:var(--ember-300);color:#12100E}
.btn--ghost{background:rgba(237,239,240,.04)}
.tag{
  display:inline-flex;align-items:center;gap:.35rem;
  padding:.18rem .55rem;border-radius:999px;
  border:1px solid var(--char-600);background:rgba(237,239,240,.03);
  font-family:var(--font-mono);font-size:.75rem;letter-spacing:.04em;color:var(--frost-400);
}
.tag--amber{color:var(--amber-400);border-color:rgba(247,183,51,.45);background:rgba(247,183,51,.08)}

/* ---------- 6. 卡片 / 指标 / 迷你条形 ---------- */
.card{
  position:relative;
  background:var(--char-800);
  border:1px solid var(--char-600);
  border-radius:var(--radius-m);
  padding:clamp(1rem,2.4vw,1.5rem);
}
.card--accent{border-left:2px solid var(--ember-500)}
.card__title{font-size:1.0625rem;font-weight:700;color:var(--frost-100)}
.card__meta{font-family:var(--font-mono);font-size:.75rem;color:var(--steel-500);letter-spacing:.04em}
.metric{display:flex;flex-direction:column;gap:.2rem}
.metric__value{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:clamp(1.5rem,3.2vw,2rem);font-weight:700;color:var(--amber-400);line-height:1.1}
.metric__label{font-size:.75rem;font-family:var(--font-mono);letter-spacing:.08em;color:var(--steel-500)}
.data-bar{position:relative;height:6px;border-radius:999px;background:var(--char-600);overflow:hidden}
.data-bar__fill{
  position:absolute;top:0;bottom:0;left:0;width:var(--bar,50%);
  background:linear-gradient(90deg,var(--data-blue-deep),var(--data-blue));
  border-radius:inherit;
}

/* ---------- 7. 图片容器（供页面阶段放置占位图） ---------- */
.media-frame{
  position:relative;overflow:hidden;
  border:1px solid var(--char-600);border-radius:var(--radius-m);
  background:linear-gradient(155deg,var(--char-800),var(--void-black) 65%);
  isolation:isolate;
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    repeating-linear-gradient(0deg,rgba(63,126,168,.14) 0 1px,transparent 1px 28px),
    repeating-linear-gradient(90deg,rgba(63,126,168,.14) 0 1px,transparent 1px 28px);
  mix-blend-mode:screen;
}
.media-frame--ember::before{
  content:"";position:absolute;z-index:1;right:-12%;bottom:-42%;width:62%;height:110%;
  background:linear-gradient(180deg,rgba(228,88,30,.42),rgba(228,88,30,0));
  transform:skewX(-14deg);pointer-events:none;
}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-frame__caption{
  position:absolute;z-index:2;left:0;bottom:0;
  padding:.4rem .7rem;border-top-right-radius:var(--radius-s);
  background:rgba(16,16,16,.84);
  font-family:var(--font-mono);font-size:.6875rem;letter-spacing:.04em;color:var(--frost-400);
}

/* ---------- 8. 面包屑 / 正文 / 表格 ---------- */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:.15rem;font-family:var(--font-mono);font-size:.75rem;color:var(--steel-500)}
.breadcrumb__item{display:inline-flex;align-items:center}
.breadcrumb__item:not(:first-child)::before{content:"/";padding-inline:.45rem;color:var(--char-600)}
.breadcrumb__item a{color:var(--steel-500)}
.breadcrumb__item a:hover{color:var(--ember-300)}
.breadcrumb__item [aria-current="page"]{color:var(--frost-400)}

.prose{max-width:34em}
.prose>*+*{margin-top:1.05em}
.prose h2{font-size:clamp(1.25rem,2.4vw,1.5rem);margin-top:2em}
.prose h3{font-size:1.125rem;margin-top:1.6em}
.prose ul{list-style:disc;padding-left:1.25em}
.prose ol{list-style:decimal;padding-left:1.4em}
.prose li::marker{color:var(--ember-500)}
.prose blockquote{border-left:2px solid var(--ember-500);padding-left:1rem;color:var(--steel-500)}
.prose code{font-family:var(--font-mono);font-size:.875em;background:var(--char-800);padding:.12em .38em;border-radius:4px}

.surface-light{background:var(--frost-100);color:var(--char-800)}
.surface-light h1,.surface-light h2,.surface-light h3,.surface-light strong,.surface-light .card__title{color:var(--char-800)}
.surface-light a{color:var(--char-800);text-decoration:underline;text-decoration-color:var(--ember-500);text-underline-offset:3px}
.surface-light .caption,.surface-light .metric__label,.surface-light .card__meta{color:#4A4744}
.surface-light .metric__value{color:#9A4A0E}

.table-wrap{overflow-x:auto;border:1px solid var(--char-600);border-radius:var(--radius-m)}
.data-table{width:100%;border-collapse:collapse;font-size:.9375rem;min-width:520px}
.data-table th,.data-table td{padding:.7rem .9rem;text-align:left;border-bottom:1px solid var(--char-600);white-space:nowrap}
.data-table thead th{background:var(--char-800);color:var(--frost-100);font-size:.8125rem;letter-spacing:.06em;font-family:var(--font-mono)}
.data-table tbody tr:nth-child(even){background:rgba(244,239,232,.035)}
.data-table td:first-child{
  position:sticky;left:0;z-index:1;
  background:var(--void-black);color:var(--frost-100);font-weight:600;
}
.data-table tbody tr:nth-child(even) td:first-child{background:#151412}

/* ---------- 9. 动效基元 ---------- */
.js-ready .reveal{opacity:0;transform:translateY(14px);transition:opacity .34s var(--ease),transform .34s var(--ease);transition-delay:var(--reveal-delay,0ms)}
.js-ready .reveal.is-visible{opacity:1;transform:none}

/* =========================================================
   10. 头部
   ========================================================= */
.skip-link{
  position:fixed;top:.5rem;left:.5rem;z-index:120;
  transform:translateY(-220%);
  background:var(--ember-500);color:#12100E;font-weight:700;font-size:.8125rem;
  padding:.6rem .9rem;border-radius:var(--radius-s);
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:none}

.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(16,16,16,.95);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--char-600);
}
@supports not ((backdrop-filter:blur(2px)) or (-webkit-backdrop-filter:blur(2px))){
  .site-header{background:var(--void-black)}
}
.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(--ember-500),var(--amber-400));
  pointer-events:none;
}

/* 口径标签条 */
.caliber-bar{
  background:linear-gradient(90deg,rgba(228,88,30,.18),rgba(16,16,16,0) 58%),var(--char-800);
  border-bottom:1px solid var(--char-600);
}
.caliber-bar__inner{
  position:relative;display:flex;align-items:center;gap:.75rem;
  min-height:34px;flex-wrap:wrap;padding-block:.2rem;
}
.caliber-bar__tag{
  font-family:var(--font-mono);font-size:.75rem;letter-spacing:.06em;
  color:var(--amber-400);border:1px solid rgba(247,183,51,.38);
  border-radius:999px;padding:.15rem .6rem;white-space:nowrap;cursor:help;
}
.caliber-bar__def{
  position:absolute;top:calc(100% - 1px);left:0;z-index:6;
  max-width:min(34rem,86vw);padding:.6rem .8rem;
  background:var(--char-800);border:1px solid var(--char-600);border-left:2px solid var(--ember-500);
  border-radius:0 var(--radius-s) var(--radius-s) 0;
  font-size:.8125rem;line-height:1.6;color:var(--frost-400);
  opacity:0;transform:translateY(-4px);pointer-events:none;
  transition:opacity .15s var(--ease),transform .15s var(--ease);
}
.caliber-bar__tag:hover+.caliber-bar__def,
.caliber-bar__tag:focus-visible+.caliber-bar__def{opacity:1;transform:none}
.caliber-bar__link{
  margin-left:auto;font-family:var(--font-mono);font-size:.75rem;
  letter-spacing:.05em;color:var(--steel-500);white-space:nowrap;
}
.caliber-bar__link:hover{color:var(--ember-300)}

/* 上层品牌说明 */
.masthead__inner{
  display:grid;grid-template-columns:auto minmax(0,1fr) auto auto;
  align-items:center;gap:clamp(.75rem,3vw,2rem);
  padding-block:.85rem;
  transition:padding-block .25s var(--ease);
}
.masthead__tagline{
  justify-self:end;font-size:.8125rem;color:var(--steel-500);
  max-height:4rem;max-width:26em;overflow:hidden;
  transition:opacity .25s var(--ease),max-height .25s var(--ease),transform .25s var(--ease);
}
.site-header[data-scrolled="true"] .masthead__inner{padding-block:.45rem}
.site-header[data-scrolled="true"] .masthead__tagline{max-height:0;opacity:0;transform:translateY(-4px)}

.brand{display:flex;align-items:center;gap:.65rem;min-width:0}
.brand__mark{
  position:relative;flex:none;width:26px;height:30px;
  background:linear-gradient(160deg,var(--ember-500),var(--amber-400));
  clip-path:polygon(50% 0%,100% 58%,50% 100%,0% 58%);
}
.brand__mark::after{
  content:"";position:absolute;left:0;right:0;bottom:26%;height:2px;
  background:var(--void-black);opacity:.65;
}
.brand__text{display:flex;flex-direction:column;line-height:1.15;min-width:0}
.brand__name{font-size:1.0625rem;font-weight:900;letter-spacing:.03em;color:var(--frost-100)}
.brand__line{font-family:var(--font-mono);font-size:.6875rem;letter-spacing:.12em;color:var(--steel-500)}

.masthead__utility{display:flex;align-items:center;gap:.5rem}
.util-link{
  font-size:.8125rem;color:var(--frost-400);
  padding:.35rem .6rem;border:1px solid var(--char-600);border-radius:var(--radius-s);
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.util-link:hover{border-color:var(--ember-500);color:var(--frost-100)}

.nav-toggle{
  display:none;align-items:center;gap:.5rem;
  border:1px solid var(--char-600);border-radius:var(--radius-s);
  padding:.45rem .7rem;font-size:.8125rem;color:var(--frost-400);
}
.nav-toggle:hover{border-color:var(--ember-500);color:var(--frost-100)}
.nav-toggle__bars{position:relative;display:block;width:16px;height:2px;background:var(--ember-500)}
.nav-toggle__bars::before,.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:var(--ember-500);
}
.nav-toggle__bars::before{top:-5px}
.nav-toggle__bars::after{top:5px}

/* 下层栏目轴 */
.site-nav{background:var(--char-800);border-bottom:1px solid var(--char-600)}
.site-nav__inner{
  display:flex;align-items:center;flex-wrap:wrap;
  gap:clamp(.5rem,2vw,1.5rem);padding-block:.4rem;
}
.nav-axis{display:flex;align-items:center;gap:.55rem;min-width:0}
.nav-axis+.nav-axis{border-left:1px solid var(--char-600);padding-left:clamp(.5rem,2vw,1.5rem)}
.nav-axis__label{
  font-family:var(--font-mono);font-size:.6875rem;letter-spacing:.16em;
  color:var(--steel-500);white-space:nowrap;
}
.nav-list{display:flex;align-items:center;flex-wrap:wrap;gap:.15rem}
.nav-list a{
  display:inline-block;padding:.45rem .65rem;
  font-size:.9375rem;color:var(--frost-400);
  border-radius:var(--radius-s);border-bottom:2px solid transparent;
  transition:color .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease);
}
.nav-list a:hover{color:var(--frost-100);background:rgba(228,88,30,.14)}
.nav-list a[aria-current="page"]{
  color:var(--amber-400);background:rgba(228,88,30,.16);border-bottom-color:var(--ember-500);
}

/* =========================================================
   11. 页脚
   ========================================================= */
.site-footer{
  position:relative;margin-top:clamp(3rem,8vw,6rem);
  background:var(--char-800);border-top:1px solid var(--char-600);
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;
  width:min(340px,62%);height:3px;
  background:linear-gradient(90deg,var(--ember-500),var(--amber-400),rgba(247,183,51,0));
}
.footer__grid{
  display:grid;grid-template-columns:1.5fr .9fr 1.1fr;
  gap:clamp(1.5rem,4vw,3rem);
  padding-block:clamp(2rem,6vw,3.5rem);
}
.footer__brand{min-width:0}
.brand--footer{margin-bottom:1rem}
.footer__lede{font-size:.9375rem;color:var(--frost-400);max-width:32em}
.footer__source{
  margin-top:1rem;padding-left:.75rem;border-left:2px solid var(--char-600);
  font-size:.8125rem;line-height:1.7;color:var(--steel-500);max-width:36em;
}
.footer__heading{
  font-family:var(--font-mono);font-size:.75rem;letter-spacing:.16em;
  color:var(--ember-300);margin-bottom:.9rem;
}
.footer__list li+li{margin-top:.45rem}
.footer__list a{
  font-size:.9375rem;color:var(--frost-400);
  transition:color .18s var(--ease);
}
.footer__list a:hover{
  color:var(--frost-100);
  text-decoration:underline;text-decoration-color:var(--ember-500);text-underline-offset:3px;
}
.footer__contact{min-width:0}
.contact-list li{
  display:flex;gap:.7rem;align-items:baseline;
  padding:.4rem 0;border-bottom:1px dashed var(--char-600);
  font-size:.875rem;color:var(--frost-400);
}
.contact-list__label{
  flex:none;min-width:3.2em;
  font-family:var(--font-mono);font-size:.75rem;color:var(--steel-500);
}
.contact-list__value{font-family:var(--font-mono);word-break:break-all}
.contact-note{margin-top:.85rem;font-size:.75rem;line-height:1.65;color:var(--steel-500);max-width:30em}
.copy-btn{
  display:inline-flex;align-items:center;gap:.4rem;margin-top:.9rem;
  padding:.45rem .8rem;border:1px solid var(--char-600);border-radius:var(--radius-s);
  font-family:var(--font-mono);font-size:.75rem;letter-spacing:.04em;color:var(--frost-400);
  transition:border-color .18s var(--ease),color .18s var(--ease),background-color .18s var(--ease);
}
.copy-btn:hover{border-color:var(--ember-500);color:var(--frost-100)}
.copy-btn[data-copied="true"]{border-color:var(--amber-400);color:var(--amber-400);background:rgba(247,183,51,.08)}
.footer__routes{margin-top:.7rem;font-size:.8125rem}
.footer__routes a{
  color:var(--ember-300);
  text-decoration:underline;text-decoration-color:rgba(240,138,90,.5);text-underline-offset:3px;
}
.footer__legal{border-top:1px solid var(--char-600);background:var(--void-black)}
.footer__legal-inner{
  display:flex;flex-wrap:wrap;align-items:center;gap:.5rem 1.25rem;
  padding-block:.9rem;
  font-family:var(--font-mono);font-size:.75rem;letter-spacing:.03em;color:var(--steel-500);
}
.legal__links{display:flex;flex-wrap:wrap;gap:1rem;margin-left:auto}
.legal__links a{color:var(--steel-500)}
.legal__links a:hover{color:var(--ember-300)}
.legal__icp{color:var(--steel-500)}
.footer__footnote{
  padding-bottom:1.25rem;
  font-size:.75rem;line-height:1.7;color:var(--steel-500);max-width:52em;
}

/* =========================================================
   12. 响应式
   ========================================================= */
@media (max-width:1024px){
  .footer__grid{grid-template-columns:1.2fr 1fr}
  .footer__contact{grid-column:1 / -1}
}
@media (max-width:900px){
  :root{--sticky-top:7rem}
  [id]{scroll-margin-top:7rem}

  .masthead__inner{grid-template-columns:minmax(0,1fr) auto;padding-block:.6rem}
  .masthead__tagline,.masthead__utility{display:none}
  .nav-toggle{display:inline-flex}

  .site-nav{
    position:fixed;top:0;right:0;z-index:55;
    width:min(23rem,88vw);height:100%;
    padding:clamp(6rem,20vw,8rem) 1.5rem 2rem;
    overflow-y:auto;
    border-left:1px solid var(--char-600);border-bottom:0;
    background:var(--char-800);
    visibility:hidden;transform:translateX(102%);
    transition:transform .3s var(--ease),visibility .3s var(--ease);
  }
  .site-nav[data-open="true"]{visibility:visible;transform:none}
  .site-nav__inner{flex-direction:column;align-items:stretch;gap:1.25rem;padding-inline:0}
  .nav-axis{flex-direction:column;align-items:stretch;gap:.5rem}
  .nav-axis+.nav-axis{border-left:0;border-top:1px solid var(--char-600);padding-left:0;padding-top:1.1rem}
  .nav-list{flex-direction:column;align-items:stretch;gap:.15rem}
  .nav-list a{padding:.65rem .7rem;font-size:1rem;border-bottom:0;border-left:2px solid transparent}
  .nav-list a[aria-current="page"]{border-bottom-color:transparent;border-left-color:var(--ember-500)}

  .split{grid-template-columns:minmax(0,1fr)}
  .split__aside{position:static}
  .grid--12{grid-template-columns:repeat(6,minmax(0,1fr))}
}
@media (max-width:640px){
  body{font-size:16px;line-height:1.72}
  .caliber-bar__def{left:0;right:0;max-width:none}
  .h-display{transform:none;max-width:none}
  .grid--12{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--cards{grid-template-columns:minmax(0,1fr)}
  .footer__grid{grid-template-columns:minmax(0,1fr)}
  .footer__contact{grid-column:auto}
  .footer__legal-inner{flex-direction:column;align-items:flex-start}
  .legal__links{margin-left:0}
  .data-table{min-width:440px}
}

/* =========================================================
   13. 可访问性与减弱动效
   ========================================================= */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .js-ready .reveal{opacity:1;transform:none}
  .site-nav{transition:none}
  .caliber-bar__def{transition:none}
}