/* ============================================================
   168中体网 · 共享样式 /assets/site.css
   竞技场夜蓝 + 荧光青 + 暖白纸面 · 刻度线编辑部体系
   ============================================================ */

:root{
  --navy:#0B1F3A;
  --ink:#061326;
  --glass:#122B4A;
  --paper:#F7F4EC;
  --teal:#00E5C7;
  --orange:#FF6B35;
  --mint:#8FF7E9;
  --steel:#7C8AA0;
  --line:#23405F;
  --success:#39D98A;
  --deep:#04141F;

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

  --w-max:1360px;
  --pad-x:clamp(18px,4vw,44px);
  --gap:clamp(16px,2vw,28px);
  --measure:42rem;
  --eas:cubic-bezier(.4,0,.2,1);
  --header-h:64px;
}

/* ---------- 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,address,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}
a{color:inherit;text-decoration:none}
address{font-style:normal}
hr{border:0}

/* ---------- base ---------- */
body{
  background-color:var(--paper);
  color:var(--navy);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
h1,h2,h3,h4{
  font-family:var(--font-head);
  font-weight:900;
  letter-spacing:-.03em;
  line-height:1.14;
  text-wrap:balance;
}
h1{font-size:clamp(30px,5vw,64px)}
h2{font-size:clamp(24px,3.2vw,40px)}
h3{font-size:clamp(19px,2.2vw,26px);letter-spacing:-.02em}
h4{font-size:clamp(16px,1.6vw,19px);letter-spacing:-.01em}
strong{font-weight:800}
small{font-size:.8125rem}
::selection{background:var(--teal);color:var(--deep)}

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

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;
  left:16px;
  top:-72px;
  z-index:300;
  display:inline-block;
  padding:11px 20px;
  background:var(--teal);
  color:var(--deep);
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
  border-radius:2px;
  box-shadow:0 12px 30px -12px rgba(0,0,0,.6);
  transition:top .2s var(--eas);
}
.skip-link:focus{top:14px}

/* ---------- layout primitives ---------- */
.site-main{display:block}
#main-content:focus{outline:none}

.container{
  width:100%;
  max-width:var(--w-max);
  margin-inline:auto;
  padding-inline:var(--pad-x);
}
.section{padding-block:clamp(48px,7vw,96px)}
.section--paper{background-color:var(--paper);color:var(--navy)}
.section--ink{background-color:var(--navy);color:var(--paper)}
.section--ink h1,.section--ink h2,.section--ink h3,.section--ink h4{color:var(--paper)}
.section--ink a{color:var(--mint)}
.section--ink a:hover{color:var(--teal)}

.grid{display:grid;gap:var(--gap)}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.stack{display:flex;flex-direction:column;gap:var(--gap)}
.prose{max-width:var(--measure);font-size:1.0625rem;line-height:1.75;color:var(--navy)}
.section--ink .prose{color:rgba(247,244,236,.86)}
.prose p+p{margin-top:.95em}
.prose ul,.prose ol{margin-top:.9em;padding-left:1.15em;list-style:disc}
.prose li+li{margin-top:.35em}
.prose a{color:var(--navy);text-decoration:underline;text-decoration-color:var(--teal);text-decoration-thickness:2px;text-underline-offset:4px}
.section--ink .prose a{color:var(--mint)}

@media (max-width:980px){
  .grid--12{grid-template-columns:repeat(6,minmax(0,1fr))}
}
@media (max-width:620px){
  .grid--12{grid-template-columns:minmax(0,1fr)}
}

/* ---------- eyebrow & rules ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--steel);
}
.eyebrow::before{
  content:"";
  width:24px;
  height:2px;
  background:var(--orange);
  flex:none;
}
.eyebrow--light{color:var(--mint)}

.tick-rule{
  height:1px;
  border:0;
  margin-block:clamp(20px,3vw,36px);
  background-color:transparent;
  background-image:repeating-linear-gradient(90deg,var(--line) 0 1px,transparent 1px 12px);
}
.tick-rule--light{
  background-image:repeating-linear-gradient(90deg,rgba(143,247,233,.38) 0 1px,transparent 1px 12px);
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  font-family:var(--font-head);
  font-size:14px;
  font-weight:700;
  letter-spacing:.06em;
  line-height:1.3;
  border:1px solid transparent;
  border-radius:2px;
  cursor:pointer;
  text-align:center;
  transition:background-color .2s var(--eas),color .2s var(--eas),border-color .2s var(--eas),box-shadow .2s var(--eas),transform .2s var(--eas);
}
.btn:active{transform:translateY(1px)}

.btn--primary{
  background-color:var(--teal);
  color:var(--deep);
  box-shadow:0 10px 26px -16px rgba(0,229,199,.9),0 0 0 1px rgba(0,229,199,.4);
}
.btn--primary:hover{background-color:var(--mint);color:var(--deep)}

.btn--ghost{
  background-color:rgba(18,43,74,.42);
  border-color:rgba(143,247,233,.4);
  color:var(--paper);
}
.btn--ghost:hover{border-color:var(--teal);color:var(--teal);background-color:rgba(18,43,74,.7)}

.btn--ink{
  background-color:var(--navy);
  color:var(--paper);
  box-shadow:0 12px 28px -20px rgba(11,31,58,.9);
}
.btn--ink:hover{background-color:var(--glass);color:var(--mint)}

/* ---------- panels ---------- */
.panel{
  background-color:#fff;
  border:1px solid rgba(35,64,95,.18);
  border-radius:2px;
  padding:clamp(18px,2.4vw,30px);
}
.panel--glass{
  background-color:rgba(18,43,74,.78);
  background-image:linear-gradient(150deg,rgba(18,43,74,.86),rgba(11,31,58,.62));
  border:1px solid rgba(143,247,233,.22);
  border-radius:14px;
  color:var(--paper);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
}
.panel--glass h2,.panel--glass h3{color:var(--paper)}

/* ---------- media ---------- */
.media-block{margin:0}
.media{
  position:relative;
  overflow:hidden;
  border-radius:2px;
  aspect-ratio:4/3;
  background-color:var(--glass);
  background-image:linear-gradient(135deg,var(--glass),var(--navy) 70%,var(--ink));
  border:1px solid rgba(35,64,95,.5);
}
.media img,
.media video{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media--wide{aspect-ratio:21/9}
.media--screen{aspect-ratio:16/10}
.media--tall{aspect-ratio:4/5}
.media--slant{
  -webkit-clip-path:polygon(0 0,100% 0,100% calc(100% - 30px),0 100%);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 30px),0 100%);
}
.media__caption{
  margin-top:9px;
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.55;
  letter-spacing:.02em;
  color:var(--steel);
}
.section--ink .media__caption{color:rgba(143,247,233,.7)}

/* ---------- breadcrumbs ---------- */
.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--steel);
}
.crumbs li{display:flex;align-items:center;gap:8px}
.crumbs li+li::before{content:"/";color:var(--line)}
.crumbs a{transition:color .18s var(--eas)}
.crumbs a:hover{color:var(--teal)}
.section--ink .crumbs{color:rgba(143,247,233,.72)}

/* ============================================================
   头部
   ============================================================ */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  background-color:transparent;
  color:var(--paper);
  transition:background-color .3s var(--eas),box-shadow .3s var(--eas);
}
.site-header::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:linear-gradient(180deg,rgba(4,20,31,.92) 0%,rgba(6,19,38,.55) 62%,rgba(6,19,38,0) 100%);
  transition:opacity .3s var(--eas);
  opacity:1;
}
.site-header[data-scrolled="true"],
.site-header[data-nav-open="true"]{
  background-color:var(--navy);
  box-shadow:0 1px 0 rgba(35,64,95,.95),0 24px 46px -36px rgba(0,0,0,.95);
}
.site-header[data-scrolled="true"]::before,
.site-header[data-nav-open="true"]::before{opacity:0}

.scroll-meter{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  background-color:rgba(35,64,95,.45);
  overflow:hidden;
  pointer-events:none;
}
.scroll-meter__fill{
  display:block;
  height:100%;
  width:0;
  background-image:linear-gradient(90deg,var(--teal),var(--orange));
  transition:width .12s linear;
}

.masthead{
  position:relative;
  z-index:1;
  width:100%;
  max-width:var(--w-max);
  margin-inline:auto;
  padding:12px var(--pad-x);
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  align-items:center;
  gap:clamp(16px,3vw,40px);
  min-height:var(--header-h);
}

/* brand */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  min-width:0;
}
.brand__glyph{
  display:inline-flex;
  align-items:flex-end;
  gap:3px;
  height:26px;
  flex:none;
}
.brand__tick{
  display:block;
  width:3px;
  border-radius:1px;
  background-color:var(--teal);
}
.brand__tick:nth-child(1){height:11px;background-color:var(--orange)}
.brand__tick:nth-child(2){height:18px;background-color:var(--mint)}
.brand__tick:nth-child(3){height:26px;background-color:var(--teal)}
.brand__text{display:flex;flex-direction:column;min-width:0}
.brand__name{
  font-family:var(--font-head);
  font-size:19px;
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.25;
  color:var(--paper);
  white-space:nowrap;
}
.brand__tag{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.05em;
  line-height:1.4;
  color:rgba(143,247,233,.72);
  transition:color .2s var(--eas);
  white-space:nowrap;
}
.brand:hover .brand__tag{color:var(--teal)}

/* nav */
.nav{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:clamp(12px,2vw,28px);
  justify-self:end;
  min-width:0;
}
.nav__list{
  display:flex;
  align-items:center;
  gap:clamp(10px,1.6vw,22px);
  flex-wrap:wrap;
}
.nav__link{
  position:relative;
  display:inline-block;
  padding:6px 2px;
  font-size:14px;
  font-weight:600;
  letter-spacing:.08em;
  line-height:1.4;
  color:rgba(247,244,236,.8);
  transition:color .2s var(--eas);
  white-space:nowrap;
}
.nav__link::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-2px;
  height:2px;
  background-color:var(--teal);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .22s var(--eas);
}
.nav__link:hover{color:var(--mint)}
.nav__link:hover::after{transform:scaleX(1)}
.nav__link[aria-current="page"]{color:var(--teal)}
.nav__link[aria-current="page"]::after{transform:scaleX(1)}
.nav__cta{flex:none;padding:10px 16px;font-size:13px}

/* mobile toggle */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 12px;
  border:1px solid rgba(143,247,233,.35);
  border-radius:2px;
  color:var(--paper);
  font-size:13px;
  font-weight:600;
  letter-spacing:.12em;
  cursor:pointer;
  justify-self:end;
  transition:border-color .2s var(--eas),color .2s var(--eas);
}
.nav-toggle:hover{border-color:var(--teal);color:var(--teal)}
.nav-toggle__bars{display:flex;flex-direction:column;gap:4px;width:18px}
.nav-toggle__bars span{
  display:block;
  height:2px;
  width:100%;
  background-color:currentColor;
  border-radius:1px;
  transition:transform .22s var(--eas),opacity .22s var(--eas);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.nav-toggle__label{line-height:1}

/* header 断点 */
@media (max-width:1120px){
  .brand__tag{display:none}
  .nav__list{gap:14px}
  .nav__link{font-size:13px;letter-spacing:.06em}
}
@media (max-width:960px){
  .masthead{grid-template-columns:minmax(0,1fr) auto;gap:12px}
  .nav-toggle{display:inline-flex}
  .nav{
    grid-column:1/-1;
    justify-self:stretch;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    width:100%;
    padding:6px 0 20px;
  }
  .nav__list{flex-direction:column;align-items:stretch;gap:0}
  .nav__link{
    display:block;
    padding:14px 2px;
    font-size:16px;
    letter-spacing:.06em;
    border-bottom:1px solid rgba(35,64,95,.85);
  }
  .nav__link::after{display:none}
  .nav__link[aria-current="page"]{color:var(--teal);box-shadow:inset 3px 0 0 var(--teal);padding-left:12px}
  .nav__cta{width:100%;margin-top:18px;padding:13px 18px;font-size:14px}

  .js .nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    max-height:calc(100vh - 100%);
    overflow-y:auto;
    padding:6px var(--pad-x) 24px;
    background-color:var(--ink);
    border-top:1px solid var(--line);
    box-shadow:0 30px 46px -30px rgba(0,0,0,.95);
    opacity:0;
    visibility:hidden;
    transform:translateY(-8px);
    pointer-events:none;
    transition:opacity .22s var(--eas),transform .22s var(--eas),visibility .22s var(--eas);
  }
  .js .nav[data-open="true"]{
    opacity:1;
    visibility:visible;
    transform:none;
    pointer-events:auto;
  }
}
@media (max-width:560px){
  .brand__name{font-size:17px}
  .brand__glyph{height:22px}
  .brand__tick:nth-child(1){height:9px}
  .brand__tick:nth-child(2){height:15px}
  .brand__tick:nth-child(3){height:22px}
  .nav-toggle__label{display:none}
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  background-color:var(--ink);
  color:rgba(247,244,236,.78);
  border-top:1px solid var(--line);
}
.footer__ruler{
  height:10px;
  background-color:transparent;
  background-image:repeating-linear-gradient(90deg,rgba(35,64,95,.95) 0 1px,transparent 1px 14px);
  border-bottom:1px solid rgba(35,64,95,.6);
}
.footer__inner{
  width:100%;
  max-width:var(--w-max);
  margin-inline:auto;
  padding:clamp(38px,5.5vw,72px) var(--pad-x) clamp(26px,4vw,44px);
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,1.45fr) minmax(0,1.05fr);
  gap:clamp(28px,4vw,56px);
}
.footer__brand{display:flex;flex-direction:column;align-items:flex-start;gap:16px}
.footer__name{
  font-family:var(--font-head);
  font-size:clamp(24px,2.6vw,32px);
  font-weight:900;
  letter-spacing:-.03em;
  line-height:1.2;
  color:var(--paper);
  display:flex;
  align-items:center;
  gap:10px;
}
.footer__name::after{
  content:"";
  width:8px;
  height:8px;
  background-color:var(--teal);
  border-radius:50%;
  flex:none;
}
.footer__about{
  max-width:30em;
  font-size:14px;
  line-height:1.8;
  color:rgba(247,244,236,.68);
}
.footer__cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px clamp(14px,2vw,28px);
}
.footer__col{min-width:0}
.footer__col-title{
  display:flex;
  align-items:center;
  gap:8px;
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.16em;
  color:var(--orange);
}
.footer__col-title::before{
  content:"";
  width:12px;
  height:2px;
  background-color:var(--orange);
  flex:none;
}
.footer__list li+li{margin-top:2px}
.footer__list a{
  display:inline-block;
  padding:5px 0;
  font-size:14px;
  letter-spacing:.02em;
  color:rgba(247,244,236,.76);
  transition:color .2s var(--eas),transform .2s var(--eas);
}
.footer__list a:hover{color:var(--teal);transform:translateX(3px)}
.footer__contact{display:flex;flex-direction:column;gap:12px;min-width:0}
.footer__address{display:flex;flex-direction:column;gap:8px}
.footer__contact-line{
  font-size:13px;
  line-height:1.65;
  color:rgba(247,244,236,.8);
  word-break:break-word;
}
.footer__contact-key{
  display:block;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--steel);
  margin-bottom:1px;
}
.footer__note{
  font-size:12.5px;
  line-height:1.7;
  color:rgba(124,138,160,.95);
  border-left:2px solid rgba(0,229,199,.35);
  padding-left:10px;
}
.footer__legal{
  width:100%;
  max-width:var(--w-max);
  margin-inline:auto;
  padding:16px var(--pad-x) 30px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  border-top:1px solid rgba(35,64,95,.75);
}
.footer__legal-text,
.footer__legal-links{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--steel);
}
.footer__legal-links{display:flex;flex-wrap:wrap;gap:8px 18px}
.footer__legal-links a{transition:color .18s var(--eas)}
.footer__legal-links a:hover{color:var(--teal)}

@media (max-width:1024px){
  .footer__inner{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .footer__contact{
    grid-column:1/-1;
    padding-top:22px;
    border-top:1px solid rgba(35,64,95,.7);
  }
  .footer__address{flex-direction:row;flex-wrap:wrap;gap:8px 32px}
}
@media (max-width:680px){
  .footer__inner{grid-template-columns:minmax(0,1fr);gap:30px}
  .footer__cols{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__address{flex-direction:column;gap:10px}
  .footer__legal{flex-direction:column;align-items:flex-start}
}

/* ============================================================
   动效：进入视口淡入（需 JS 加 html.js）
   ============================================================ */
.js [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .55s var(--eas),transform .55s var(--eas);
}
.js [data-reveal].is-in{
  opacity:1;
  transform:none;
}

@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 [data-reveal]{opacity:1;transform:none}
  .footer__list a:hover{transform:none}
}