/* ============================================================
   EMC易倍体育 · 共享样式表 /assets/site.css
   深夜蓝底 · EMC经典蓝结构 · 荧光青细描边 · 活力橙行动点
   ============================================================ */

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;overflow-x:hidden}
h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video,canvas{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}

:root{
  --ink:#0A1633;
  --ink-2:#10275C;
  --blue:#1B4DE4;
  --blue-soft:#5B8CFF;
  --cyan:#35F2E0;
  --orange:#FF6A1A;
  --amber:#FFC24B;
  --mist:#F4F7FF;
  --white:#FFFFFF;
  --graphite:#4A5474;

  --line:2px solid var(--ink);
  --hard:6px 6px 0 var(--ink);
  --hard-sm:4px 4px 0 var(--ink);
  --ease:cubic-bezier(.2,.8,.2,1);
  --edge:clamp(16px,4.4vw,56px);
  --maxw:1280px;

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

/* ---------- 中文排版基线 ---------- */
html{scroll-behavior:smooth}
body{
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  color:var(--ink);
  background-color:var(--mist);
  background-image:radial-gradient(rgba(10,22,51,.055) 1px,transparent 1px);
  background-size:22px 22px;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-weight:900;line-height:1.14;letter-spacing:-.02em}
h1{font-size:clamp(34px,6.2vw,68px)}
h2{font-size:clamp(26px,3.6vw,42px)}
h3{font-size:clamp(20px,2.2vw,26px)}
h4{font-size:18px;letter-spacing:0}
p{max-width:74ch}
strong{font-weight:900}
.mono,.eyebrow,.stat-value,.stat-label,.breadcrumb,.toc-link,.meta{font-family:var(--font-mono)}

:focus-visible{outline:3px solid var(--orange);outline-offset:3px;border-radius:2px}
::selection{background:var(--blue);color:#fff}

.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;left:12px;top:0;z-index:300;
  transform:translateY(-140%);
  background:var(--orange);color:#fff;font-weight:900;font-size:15px;
  padding:10px 18px;border-radius:0 0 14px 14px;
  box-shadow:var(--hard-sm);
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ============================================================
   悬浮胶囊头部
   ============================================================ */
.site-header{
  position:sticky;top:0;z-index:80;
  padding:12px var(--edge) 0;
  transition:padding .28s var(--ease);
}
.site-header[data-scrolled]{padding-top:6px}

.scroll-progress{
  position:absolute;left:0;right:0;top:0;height:3px;
  background:rgba(10,22,51,.12);overflow:hidden;
}
.scroll-progress > span{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--blue) 0%,var(--cyan) 62%,var(--orange) 100%);
  will-change:transform;
}

.header-shell{
  max-width:var(--maxw);margin:0 auto;
  display:flex;align-items:center;gap:clamp(10px,1.6vw,20px);
}

/* 品牌浮岛 */
.brand-island{
  display:flex;align-items:center;gap:10px;
  flex:0 0 auto;
  padding:7px 16px 7px 8px;
  background:var(--white);
  border:var(--line);
  border-radius:999px;
  box-shadow:var(--hard-sm);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.brand-island:hover{transform:translateY(-2px);box-shadow:6px 6px 0 var(--ink)}
.brand-mark{
  width:30px;height:30px;flex:0 0 auto;border-radius:9px;
  border:2px solid var(--ink);
  background:
    repeating-linear-gradient(135deg,var(--cyan) 0 5px,transparent 5px 10px),
    linear-gradient(140deg,var(--blue) 0%,var(--ink-2) 100%);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-name{font-weight:900;font-size:16px;letter-spacing:.01em}
.brand-tag{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;
  color:var(--blue);text-transform:none;
}
.site-header[data-scrolled] .brand-tag{display:none}

/* 栏目胶囊 */
.nav-capsule{
  flex:1 1 auto;min-width:0;
  display:flex;align-items:center;justify-content:space-between;
  gap:clamp(8px,1.6vw,20px);
  padding:6px 8px 6px 14px;
  background:var(--ink-2);
  border:2px solid var(--ink);
  border-radius:999px;
  box-shadow:5px 5px 0 rgba(10,22,51,.22);
  transition:padding .28s var(--ease);
}
.site-header[data-scrolled] .nav-capsule{padding:4px 6px 4px 12px}

.nav-list{
  display:flex;align-items:center;gap:2px;
  min-width:0;overflow-x:auto;scrollbar-width:none;
}
.nav-list::-webkit-scrollbar{display:none}
.nav-item{display:flex}

.nav-link{
  display:inline-block;white-space:nowrap;
  padding:8px 12px;border-radius:999px;
  font-size:15px;font-weight:700;color:#C6D4F7;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.nav-link:hover{color:var(--cyan);background:rgba(53,242,224,.12)}
.nav-link[aria-current="page"]{
  background:var(--blue);color:#fff;
  box-shadow:inset 0 0 0 1px rgba(53,242,224,.55);
}

.nav-actions{display:flex;align-items:center;gap:8px;flex:0 0 auto}

/* 移动端菜单按钮 */
.nav-toggle{
  display:none;align-items:center;gap:8px;
  padding:9px 14px;
  background:var(--ink);color:#fff;
  border:2px solid var(--cyan);border-radius:999px;
  font-weight:800;font-size:14px;
  box-shadow:4px 4px 0 rgba(10,22,51,.25);
}
.nav-toggle-icon{display:flex;flex-direction:column;gap:4px;width:18px}
.nav-toggle-icon i{display:block;height:2px;background:var(--cyan);border-radius:2px;transition:transform .25s var(--ease),opacity .25s var(--ease)}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon i:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon i:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.nav-toggle-text{letter-spacing:.04em}

/* ============================================================
   按钮
   ============================================================ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 20px;border-radius:999px;
  font-family:var(--font-sans);font-size:15px;font-weight:800;letter-spacing:.01em;
  border:2px solid var(--ink);background:var(--white);color:var(--ink);
  box-shadow:3px 3px 0 var(--ink);
  transition:transform .16s var(--ease),box-shadow .16s var(--ease),background .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
}
.btn:hover{transform:translate(-1px,-1px);box-shadow:5px 5px 0 var(--ink)}
.btn:active{transform:translate(2px,2px);box-shadow:1px 1px 0 var(--ink)}

.btn--sm{padding:7px 14px;font-size:14px;box-shadow:2px 2px 0 var(--ink)}

.btn--primary{background:var(--orange);border-color:var(--ink);color:#fff}
.btn--outline{background:transparent;color:var(--blue);border-color:var(--blue);box-shadow:3px 3px 0 var(--blue)}
.btn--outline:hover{box-shadow:5px 5px 0 var(--blue)}

/* 深底中的按钮 */
.nav-capsule .btn,
.card--ink .btn,
.footer-inner .btn{
  border-color:rgba(198,212,247,.4);
  background:transparent;color:#DCE6FF;
  box-shadow:none;transform:none;
}
.nav-capsule .btn--primary,
.card--ink .btn--primary,
.footer-inner .btn--primary{
  background:var(--orange);border-color:var(--orange);color:#fff;
}
.nav-capsule .btn:hover{background:rgba(53,242,224,.14);color:var(--cyan);border-color:var(--cyan);box-shadow:none;transform:none}
.nav-capsule .btn--primary:hover{background:var(--orange);color:#fff;border-color:var(--amber)}

/* ============================================================
   通用布局
   ============================================================ */
.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--edge)}
.container--narrow{max-width:820px}

.section{padding-block:clamp(56px,8vw,104px)}
.section--tight{padding-block:clamp(36px,5vw,64px)}

.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:clamp(24px,3vw,40px)}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;letter-spacing:.14em;color:var(--blue);font-weight:700;
  text-transform:uppercase;margin-bottom:10px;
}
.eyebrow::before{content:"";width:26px;height:3px;background:var(--orange);display:block}
.section-title{max-width:22ch}
.lede{font-size:clamp(16px,1.3vw,18px);color:var(--graphite);margin-top:14px}

.grid{display:grid;gap:clamp(16px,2.4vw,28px);grid-template-columns:repeat(12,minmax(0,1fr))}
.grid > *{grid-column:span 12}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--split{grid-template-columns:minmax(0,4fr) minmax(0,8fr)}
.grid--split-r{grid-template-columns:minmax(0,8fr) minmax(0,4fr)}

/* 斜切色带分割 */
.band{
  height:14px;border-block:2px solid var(--ink);
  background:repeating-linear-gradient(115deg,var(--blue) 0 24px,var(--cyan) 24px 30px,var(--ink) 30px 66px);
}

/* ============================================================
   卡片 / 数据 / 标签
   ============================================================ */
.card{
  background:var(--white);
  border:var(--line);
  box-shadow:var(--hard);
  padding:clamp(18px,2.2vw,28px);
  border-radius:4px;
}
.card--ink{background:var(--ink);color:#E4EBFF;border-color:var(--ink)}
.card--ink .card-text{color:#B9C7EA}
.card-title{font-size:20px;font-weight:900;margin-bottom:8px}
.card-text{color:var(--graphite);font-size:16px}

.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:7px 14px;border-radius:999px;
  border:2px solid var(--ink);background:var(--white);
  font-size:14px;font-weight:700;color:var(--ink);
  transition:background .16s var(--ease),color .16s var(--ease),transform .16s var(--ease);
}
.chip:hover{background:var(--ink);color:var(--cyan)}
.chip[aria-pressed="true"],.chip.is-active{background:var(--blue);border-color:var(--ink);color:#fff}

.badge{
  display:inline-block;padding:3px 10px;border-radius:4px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;
  background:var(--cyan);color:var(--ink);border:2px solid var(--ink);
}
.badge--amber{background:var(--amber)}
.badge--orange{background:var(--orange);color:#fff}

.stat{border-left:5px solid var(--blue);padding-left:16px}
.stat-value{display:block;font-size:clamp(34px,4.6vw,56px);font-weight:700;line-height:1;color:var(--ink)}
.stat-label{display:block;margin-top:8px;font-size:13px;letter-spacing:.08em;color:var(--graphite)}

.meter{height:10px;background:rgba(10,22,51,.12);border:2px solid var(--ink);border-radius:999px;overflow:hidden}
.meter-fill{display:block;height:100%;width:var(--level,50%);background:linear-gradient(90deg,var(--blue),var(--cyan));transition:width .5s var(--ease)}
.meter-fill--orange{background:linear-gradient(90deg,var(--orange),var(--amber))}

/* ============================================================
   图片容器基础规则（页面阶段放入 img / SVG）
   ============================================================ */
.media-frame{
  position:relative;display:block;overflow:hidden;
  aspect-ratio:16/9;
  background:var(--ink-2);
  border:var(--line);
  box-shadow:var(--hard);
  border-radius:4px;
}
.media-frame img,.media-frame svg,.media-frame video{width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-frame:empty::after{
  content:"";position:absolute;inset:0;
  background:
    repeating-linear-gradient(135deg,rgba(53,242,224,.18) 0 10px,transparent 10px 22px),
    linear-gradient(150deg,var(--ink-2),var(--ink));
}
.media-frame__caption{
  position:absolute;left:0;bottom:0;
  background:var(--ink);color:var(--cyan);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.05em;
  padding:6px 12px;border-top:2px solid var(--cyan);border-right:2px solid var(--cyan);
}

/* ============================================================
   面包屑 / 章节索引 / 返回顶部
   ============================================================ */
.breadcrumb{padding-block:18px;font-size:13px;color:var(--graphite)}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb-item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb-item + .breadcrumb-item::before{content:"/";color:var(--blue-soft)}
.breadcrumb-item a:hover{color:var(--blue);text-decoration:underline;text-underline-offset:3px}

.toc{display:flex;flex-direction:column;gap:2px}
.toc-link{
  display:block;padding:8px 12px;border-left:3px solid rgba(10,22,51,.18);
  font-size:13px;letter-spacing:.03em;color:var(--graphite);
  transition:color .18s var(--ease),border-color .18s var(--ease),background .18s var(--ease);
}
.toc-link:hover{color:var(--blue);border-color:var(--blue-soft);background:rgba(27,77,228,.06)}
.toc-link[aria-current="true"]{color:var(--ink);border-color:var(--orange);background:rgba(255,106,26,.09);font-weight:700}

.to-top{
  position:fixed;right:clamp(14px,3vw,34px);bottom:clamp(14px,3vw,34px);z-index:70;
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 16px;border-radius:999px;
  background:var(--ink);color:var(--cyan);
  border:2px solid var(--cyan);
  font-size:13px;font-weight:800;letter-spacing:.06em;
  box-shadow:4px 4px 0 rgba(10,22,51,.35);
  opacity:0;visibility:hidden;transform:translateY(14px);
  transition:opacity .26s var(--ease),transform .26s var(--ease),visibility .26s;
}
.to-top[data-show]{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{color:#fff;background:var(--blue)}

/* ============================================================
   入场显现
   ============================================================ */
html.js [data-reveal]{
  opacity:0;transform:translateY(24px);
  transition:opacity .42s var(--ease),transform .42s var(--ease);
}
html.js [data-reveal].is-in{opacity:1;transform:none}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  position:relative;
  margin-top:clamp(72px,10vw,132px);
  background:var(--ink);
  color:#C6D4F7;
  border-top:2px solid var(--cyan);
}
.site-footer::before{
  content:"";position:absolute;inset:0 0 auto 0;height:6px;
  background:repeating-linear-gradient(115deg,var(--blue) 0 22px,var(--cyan) 22px 28px,transparent 28px 60px);
  opacity:.85;
}
.footer-inner{max-width:var(--maxw);margin-inline:auto;padding:clamp(44px,6vw,80px) var(--edge) 26px}

.footer-grid{
  display:grid;gap:clamp(28px,4vw,56px);
  grid-template-columns:minmax(0,1.15fr) minmax(0,2.2fr);
  padding-bottom:clamp(26px,3.4vw,44px);
  border-bottom:1px dashed rgba(198,212,247,.28);
}
.footer-brand-name{font-size:22px;font-weight:900;color:#fff;letter-spacing:.02em}
.footer-brand-tag{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  color:var(--cyan);margin-top:6px;
}
.footer-brand-note{margin-top:14px;font-size:14px;line-height:1.8;color:#93A5CC;max-width:36ch}

.footer-nav{display:grid;gap:clamp(20px,3vw,36px);grid-template-columns:repeat(3,minmax(0,1fr))}
.footer-col-title{
  font-family:var(--font-mono);font-size:12px;font-weight:700;letter-spacing:.16em;
  color:var(--cyan);margin-bottom:14px;text-transform:uppercase;
}
.footer-col-title::before{content:"— ";color:var(--amber)}
.footer-links{display:flex;flex-direction:column;gap:9px}
.footer-link{
  font-size:15px;color:#AFC0E6;
  transition:color .18s var(--ease),transform .18s var(--ease);
  display:inline-block;
}
.footer-link:hover{color:#fff;transform:translateX(3px);text-decoration:underline;text-underline-offset:4px;text-decoration-color:var(--orange)}

.footer-contact{
  display:flex;flex-wrap:wrap;gap:10px 16px;
  padding:clamp(20px,2.6vw,30px) 0;
  border-bottom:1px dashed rgba(198,212,247,.22);
}
.footer-contact-item{
  display:inline-flex;align-items:center;gap:10px;
  border:2px solid rgba(53,242,224,.32);
  border-radius:999px;padding:7px 16px;
  max-width:100%;
}
.footer-contact-label{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  color:var(--cyan);flex:0 0 auto;
}
.footer-contact-value{font-size:14px;color:#DCE6FF;word-break:break-all}

.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 20px;padding-top:22px;
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.05em;color:#7C8CB5;
}
.footer-legal{color:var(--amber)}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1180px){
  .nav-link{padding:8px 10px;font-size:14.5px}
}

@media (max-width:1023px){
  .site-header{padding-top:10px}
  .nav-toggle{display:inline-flex;margin-left:auto}

  .nav-capsule{
    position:fixed;left:var(--edge);right:var(--edge);bottom:12px;
    flex-direction:column;align-items:stretch;justify-content:flex-start;
    gap:12px;padding:16px;border-radius:24px;
    max-height:78vh;overflow-y:auto;
    transform:translateY(calc(100% + 40px));
    opacity:0;visibility:hidden;
    transition:transform .32s var(--ease),opacity .32s var(--ease),visibility .32s;
  }
  .nav-capsule[data-open]{transform:translateY(0);opacity:1;visibility:visible}

  .nav-list{flex-direction:column;align-items:stretch;gap:4px;overflow:visible}
  .nav-item{display:block}
  .nav-link{display:block;padding:13px 16px;font-size:16px;border-radius:14px}
  .nav-link[aria-current="page"]{box-shadow:inset 0 0 0 1px rgba(53,242,224,.55)}

  .nav-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;padding-top:10px;border-top:2px dashed rgba(198,212,247,.28)}
  .nav-capsule .btn{padding:12px 14px;border-radius:14px;font-size:15px;justify-content:center}

  .to-top{bottom:calc(clamp(14px,3vw,34px) + 72px)}

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

@media (max-width:720px){
  body{font-size:16px}
  .brand-island{padding:6px 12px 6px 7px}
  .brand-tag{display:none}
  .brand-name{font-size:15px}
  .nav-toggle-text{display:none}
  .nav-toggle{padding:10px 12px}

  .grid--2,.grid--3,.grid--split,.grid--split-r{grid-template-columns:minmax(0,1fr)}
  .footer-nav{grid-template-columns:minmax(0,1fr)}
  .footer-contact-item{border-radius:14px;width:100%}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .band{height:10px}
  .card{box-shadow:4px 4px 0 var(--ink)}
  .media-frame{box-shadow:4px 4px 0 var(--ink)}
}

@media (max-width:420px){
  .nav-actions{grid-template-columns:minmax(0,1fr)}
}

/* ---------- 无障碍：减少动态 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  html.js [data-reveal]{opacity:1;transform:none}
  .to-top{transition:none}
}