/* ============================================================
   完美体育CN · 共享样式 /assets/site.css
   深夜墨绿底 + 暖纸色纸面 + 亮橙/荧光青印刷强调
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root{
  --ink:#0A1A13;
  --panel:#102A20;
  --line:#16382A;
  --paper:#F4ECDD;
  --paper-2:#E4D8C0;
  --orange:#FF7A18;
  --cyan:#34E3D0;
  --metal:#C9D2CC;
  --yellow:#F2C230;
  --red:#E0453A;

  --text-soft:rgba(244,236,221,.72);
  --text-faint:rgba(244,236,221,.46);
  --hair:rgba(244,236,221,.14);

  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:var(--font-display);
  --font-mono:"IBM Plex Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --shell:1180px;
  --gut:clamp(18px,4.2vw,44px);
  --b:8px;
  --r:2px;
  --shadow-lift:0 18px 34px -24px rgba(0,0,0,.95);
}

/* ---------- 2. Reset / 基础 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,
h1,h2,h3,h4,h5,p,figure,blockquote,ul,ol,dl,dd,hr{margin:0}
ul,ol{padding:0}
img,svg,video{display:block;max-width:100%}
img{height:auto}
button,input,select,textarea{font:inherit;color:inherit}
a{color:inherit}
table{border-collapse:collapse}

body{
  min-height:100vh;
  background-color:var(--ink);
  background-image:
    radial-gradient(1100px 480px at 50% -10%, rgba(52,227,208,.08), rgba(52,227,208,0) 65%),
    radial-gradient(900px 520px at 100% 0%, rgba(255,122,24,.06), rgba(255,122,24,0) 60%);
  background-repeat:no-repeat;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.9;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.16;
  letter-spacing:-.025em;
}
h1{font-size:clamp(32px,5.4vw,66px)}
h2{font-size:clamp(28px,4vw,40px)}
h3{font-size:clamp(18px,2.4vw,22px)}
h4{font-size:17px}
p{font-size:16px;line-height:1.9}
a{text-decoration:none}
hr{border:0;border-top:1px solid var(--line);margin:0}
strong{font-weight:800}

::selection{background:var(--orange);color:#0A1A13}

:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

#main-content:focus{outline:none}
main{display:block;scroll-margin-top:110px}

/* ---------- 3. 布局工具 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gut);
}
.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}
.stack{display:grid;gap:calc(var(--b) * 2)}

.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--sidebar{grid-template-columns:minmax(240px,3fr) minmax(0,9fr)}

/* ---------- 4. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 18px;
  font-family:var(--font-display);font-weight:800;font-size:13px;
  letter-spacing:.08em;line-height:1.2;white-space:nowrap;
  color:var(--paper);
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r);
  cursor:pointer;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .18s ease;
}
.btn:hover{transform:translateY(-2px);border-color:var(--hair)}
.btn--signal{
  background:var(--orange);border-color:var(--orange);color:#0A1A13;
}
.btn--signal:hover{background:#FF8C36;border-color:#FF8C36}
.btn--ghost{background:transparent;color:var(--paper)}

.copy-btn{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;
  padding:3px 9px;background:transparent;color:var(--cyan);
  border:1px solid rgba(52,227,208,.42);border-radius:var(--r);
  cursor:pointer;transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.copy-btn:hover{background:rgba(52,227,208,.12);border-color:var(--cyan)}
.copy-btn[data-copied="true"]{background:var(--cyan);color:#0A1A13;border-color:var(--cyan)}

/* ---------- 5. 页头 ---------- */
.skip-link{
  position:absolute;left:-9999px;top:0;z-index:99;
  padding:10px 16px;
  font-weight:800;font-size:13px;letter-spacing:.08em;
  color:#0A1A13;background:var(--orange);
  border-radius:0 0 var(--r) 0;
}
.skip-link:focus{left:0}

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

.masthead{
  background:linear-gradient(180deg,#0C211A,#0A1A13);
  border-bottom:1px solid var(--line);
  transition:border-color .3s ease;
}
.masthead__inner{
  display:flex;flex-direction:column;align-items:center;gap:12px;
  max-height:300px;overflow:hidden;
  padding-block:clamp(24px,3.4vw,40px) clamp(18px,2.4vw,26px);
  text-align:center;
  transition:max-height .42s ease,opacity .3s ease,padding .42s ease;
}
.site-header[data-scrolled="true"] .masthead__inner{
  max-height:0;opacity:0;padding-block:0;
}
.site-header[data-scrolled="true"] .masthead{border-bottom-color:transparent}

.masthead__eyebrow{
  font-size:11px;font-weight:800;letter-spacing:.34em;text-indent:.34em;
  color:var(--text-faint);
}
.brand{
  display:inline-flex;align-items:center;gap:12px;
  text-decoration:none;
}
.brand__mark{
  display:grid;place-items:center;flex:none;
  width:36px;height:36px;
  background:var(--orange);color:#0A1A13;
  font-family:var(--font-display);font-weight:900;font-size:18px;line-height:1;
  border-radius:var(--r);
}
.brand__name{
  font-family:var(--font-display);font-weight:900;line-height:1;
  font-size:clamp(32px,5.4vw,66px);letter-spacing:-.04em;
  color:var(--paper);
  transition:color .2s ease;
}
.brand:hover .brand__name{color:var(--orange)}
.masthead__tagline{
  font-size:12px;letter-spacing:.2em;text-indent:.2em;
  color:var(--metal);
}

.site-nav{position:relative;background:var(--ink)}
.site-nav__inner{
  position:relative;
  display:grid;grid-template-columns:1fr auto 1fr;
  align-items:center;gap:10px;
  min-height:56px;
}
.nav-list{
  display:flex;align-items:center;justify-content:center;flex-wrap:wrap;
  gap:clamp(6px,1.4vw,20px);
  list-style:none;margin:0;padding:0;
}
.nav-list__item{display:block}
.nav-link{
  display:inline-block;padding:6px 2px;
  font-family:var(--font-display);font-weight:800;font-size:12.5px;
  letter-spacing:.1em;
  color:var(--metal);
  border-bottom:2px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}
.nav-link:hover{color:var(--paper)}
.nav-link[aria-current="page"]{color:var(--orange);border-bottom-color:var(--orange)}

.nav-toggle{
  display:none;align-items:center;gap:10px;justify-self:start;
  padding:9px 12px;
  font-size:12px;letter-spacing:.16em;font-weight:800;
  color:var(--paper);background:transparent;
  border:1px solid var(--line);border-radius:var(--r);
  cursor:pointer;
}
.nav-toggle:hover{border-color:var(--hair)}
.nav-toggle__bars{
  position:relative;display:block;width:18px;height:2px;background:var(--paper);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--paper);
  transition:transform .22s ease,top .22s ease,background .22s ease;
}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.site-header[data-open="true"] .nav-toggle__bars{background:transparent}
.site-header[data-open="true"] .nav-toggle__bars::before{top:0;transform:rotate(45deg);background:var(--orange)}
.site-header[data-open="true"] .nav-toggle__bars::after{top:0;transform:rotate(-45deg);background:var(--orange)}

.site-nav__cta{justify-self:end}

.scroll-progress{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:rgba(244,236,221,.07);
  overflow:hidden;pointer-events:none;
}
.scroll-progress__bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
  transition:width .12s linear;
}

/* ---------- 6. 页脚 ---------- */
.site-footer{
  margin-top:clamp(48px,7vw,96px);
  background:var(--panel);
  border-top:1px solid var(--line);
  color:var(--paper);
}
.footer-top{
  display:grid;grid-template-columns:minmax(210px,1fr) minmax(0,2.6fr);
  gap:clamp(26px,4vw,56px);
  padding-block:clamp(36px,5vw,64px) clamp(26px,3.4vw,44px);
}
.footer-brand__name{
  font-family:var(--font-display);font-weight:900;font-size:26px;
  letter-spacing:-.035em;color:var(--paper);line-height:1.2;
}
.footer-brand__line{
  margin-top:10px;
  font-size:11.5px;letter-spacing:.16em;line-height:1.9;
  color:var(--text-faint);
}
.footer-grid{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(20px,3vw,40px);
}
.footer-col__title{
  margin-bottom:14px;
  font-family:var(--font-display);font-weight:800;
  font-size:11.5px;letter-spacing:.22em;
  color:var(--orange);
}
.footer-list{display:grid;gap:9px;list-style:none;margin:0;padding:0}
.footer-link{
  font-size:14px;color:var(--metal);
  border-bottom:1px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}
.footer-link:hover{color:var(--paper);border-bottom-color:var(--orange)}
.footer-key{font-size:13.5px;line-height:1.75;color:var(--metal)}
.footer-meta{display:grid;gap:12px}
.footer-meta__row{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.footer-meta__label{
  font-size:11px;letter-spacing:.16em;color:var(--text-faint);
}
.footer-meta__value{
  font-family:var(--font-mono);font-size:13px;letter-spacing:.02em;
  color:var(--paper);word-break:break-all;
}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;
  padding-block:18px;
  border-top:1px solid var(--line);
}
.footer-copy{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;
  color:var(--metal);
}
.footer-legal{display:flex;flex-wrap:wrap;gap:18px;list-style:none;margin:0;padding:0}
.footer-legal .footer-link{font-size:12px;letter-spacing:.06em}

/* ---------- 7. 面包屑 / 章节 / 正文 ---------- */
.breadcrumb{padding-block:20px 0}
.breadcrumb__list{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  list-style:none;margin:0;padding:0;
  font-size:11.5px;letter-spacing:.12em;color:var(--text-faint);
}
.breadcrumb__link{color:var(--metal)}
.breadcrumb__link:hover{color:var(--orange)}
.breadcrumb__sep{color:rgba(244,236,221,.28)}

.section{padding-block:clamp(48px,7vw,96px)}
.section__eyebrow{
  margin-bottom:12px;
  font-size:11.5px;font-weight:800;letter-spacing:.24em;
  color:var(--orange);
}
.section__title{margin-bottom:14px}
.section__lead{max-width:56ch;color:var(--text-soft)}

.prose{max-width:64ch;font-size:17px;line-height:1.95;color:var(--paper)}
.prose p{margin-bottom:1.1em}
.prose h2{margin:1.6em 0 .6em;font-size:clamp(24px,3vw,32px)}
.prose h3{margin:1.4em 0 .5em}
.prose ul,.prose ol{margin:0 0 1.1em;padding-left:1.3em}
.prose li{margin-bottom:.4em}
.prose a{color:var(--cyan);border-bottom:1px solid rgba(52,227,208,.45)}
.prose a:hover{border-bottom-color:var(--cyan)}
.prose--paper{
  padding:clamp(22px,3vw,40px);
  background:var(--paper);color:#0F241B;
  border-radius:var(--r);
  box-shadow:var(--shadow-lift);
}
.prose--paper h2,.prose--paper h3{color:#0A1A13}
.prose--paper a{color:#0A1A13;border-bottom-color:var(--orange)}

/* ---------- 8. 卡片 / 标签 / 面板 ---------- */
.card{
  padding:clamp(18px,2.4vw,26px);
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.card:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow-lift);
  border-color:rgba(52,227,208,.35);
}
.card__title{font-size:20px;margin-bottom:8px}
.card__meta{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;
  color:var(--metal);
}
.card--paper{background:var(--paper);color:#0F241B;border-color:var(--paper-2)}
.card--paper .card__title{color:#0A1A13}
.card--paper .card__meta{color:#4A5A52}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 9px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;line-height:1.4;
  color:var(--metal);
  background:rgba(16,42,32,.72);
  border:1px solid var(--line);border-radius:999px;
}
.tag--signal{color:#0A1A13;background:var(--orange);border-color:var(--orange)}
.tag--data{color:var(--cyan);border-color:rgba(52,227,208,.5)}
.tag--yellow{color:var(--yellow);border-color:rgba(242,194,48,.55)}
.tag--red{color:var(--red);border-color:rgba(224,69,58,.55)}

.panel{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r);
  overflow:hidden;
}
.panel__head{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:14px 18px;
  border-bottom:1px solid var(--line);
}
.panel__title{
  font-family:var(--font-display);font-weight:800;font-size:13px;
  letter-spacing:.16em;color:var(--paper);
}
.panel__body{padding:18px}

/* ---------- 9. 图片容器 ---------- */
.media{
  position:relative;display:block;overflow:hidden;
  border:1px solid var(--line);border-radius:var(--r);
  background:linear-gradient(160deg,#102A20,#08150F);
}
.media--16x9{aspect-ratio:16 / 9}
.media--4x3{aspect-ratio:4 / 3}
.media--3x4{aspect-ratio:3 / 4}
.media--1x1{aspect-ratio:1 / 1}
.media__img{width:100%;height:100%;object-fit:cover;object-position:center}
.media__badge{
  position:absolute;left:10px;bottom:10px;
  padding:4px 8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;
  color:var(--paper);background:rgba(10,26,19,.86);
  border:1px solid var(--line);border-radius:var(--r);
}
.media__crest{
  position:absolute;right:10px;top:10px;
  width:30px;height:30px;
  border:1px solid rgba(244,236,221,.35);border-radius:50%;
  background:rgba(10,26,19,.7);
}
.media__caption{
  margin-top:10px;
  font-size:12px;letter-spacing:.08em;color:var(--metal);
}

/* ---------- 10. 表格 / 统计数字 ---------- */
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
.data-table{width:100%;min-width:520px}
.data-table th,
.data-table td{
  padding:10px 12px;
  text-align:left;
  border-bottom:1px solid var(--line);
}
.data-table thead th{
  font-family:var(--font-display);font-weight:800;font-size:11px;
  letter-spacing:.16em;color:var(--metal);white-space:nowrap;
}
.data-table td{
  font-family:var(--font-mono);font-size:13px;letter-spacing:.02em;
  color:var(--paper);
  font-variant-numeric:tabular-nums;
}
.data-table tbody tr:nth-child(even){background:rgba(244,236,221,.03)}
.data-table td[data-num],
.data-table th[data-num]{text-align:right}

.stat{display:grid;gap:6px}
.stat__value{
  font-family:var(--font-mono);font-weight:500;
  font-size:clamp(40px,7vw,72px);line-height:1;
  letter-spacing:-.02em;color:var(--paper);
  font-variant-numeric:tabular-nums;
}
.stat__label{font-size:11.5px;letter-spacing:.18em;color:var(--metal)}
.stat--signal .stat__value{color:var(--orange)}
.stat--data .stat__value{color:var(--cyan)}

/* ---------- 11. 滚动显现 ---------- */
[data-reveal]{
  opacity:0;transform:translateY(14px);
  transition:opacity .5s ease,transform .5s ease;
}
[data-reveal][data-revealed="true"]{opacity:1;transform:none}

/* ---------- 12. 响应式 ---------- */
@media (max-width:1080px){
  .site-nav__inner{grid-template-columns:1fr auto 1fr;min-height:58px}
  .nav-toggle{display:inline-flex}
  .site-nav__cta{font-size:12px;padding:9px 12px}
  .nav-list{
    position:absolute;left:0;right:0;top:100%;
    display:grid;justify-items:stretch;gap:0;
    padding:8px var(--gut) 16px;
    background:var(--panel);
    border-bottom:1px solid var(--line);
    box-shadow:0 30px 44px -32px rgba(0,0,0,.98);
    opacity:0;visibility:hidden;transform:translateY(-10px);pointer-events:none;
    transition:opacity .22s ease,transform .22s ease,visibility .22s ease;
  }
  .site-header[data-open="true"] .nav-list{
    opacity:1;visibility:visible;transform:none;pointer-events:auto;
  }
  .nav-link{
    display:block;padding:12px 4px;
    font-size:14px;
    border-bottom:1px solid var(--line);
  }
  .nav-list__item:last-child .nav-link{border-bottom:0}
  .nav-link[aria-current="page"]{box-shadow:inset 3px 0 0 var(--orange);padding-left:12px}

  .grid--sidebar{grid-template-columns:minmax(0,1fr)}
  .footer-top{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
}

@media (max-width:820px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:640px){
  html{scroll-behavior:auto}
  body{font-size:15.5px}
  .grid--2,.grid--3{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .masthead__eyebrow{letter-spacing:.24em;text-indent:.24em}
  .brand__mark{width:30px;height:30px;font-size:15px}
  .prose{font-size:16px}
  .site-nav__cta{padding:8px 10px;letter-spacing:.04em}
}

/* ---------- 13. 降低动效 ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html{scroll-behavior:auto}
  [data-reveal]{opacity:1;transform:none}
}