/* =========================================================
   天博赛场 / shared site kit
   /assets/site.css
   ========================================================= */

/* ---------- 01 RESET ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:104px}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,blockquote{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}
p{overflow-wrap:anywhere}
:where(a,button,summary,[tabindex]):focus-visible{outline:2px solid var(--teal);outline-offset:3px;border-radius:2px}
::selection{background:var(--teal);color:#04170F}

/* ---------- 02 TOKENS ---------- */
:root{
  --ink:#070C1A;
  --ink-2:#111B30;
  --steel:#2B3A52;
  --steel-soft:#1A2740;
  --paper:#F0E4CC;
  --paper-2:#FFF8EA;
  --teal:#35F0C0;
  --orange:#FF8A3D;
  --magenta:#D65AA6;
  --pitch:#0E3B33;
  --alert:#FF5C6C;

  --text:#FFF8EA;
  --text-dim:#B9C4D6;
  --text-mute:#7E8CA4;

  --line:#243146;
  --line-soft:rgba(43,58,82,.5);

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

  --cut:polygon(0 0,calc(100% - 18px) 0,100% 18px,100% 100%,18px 100%,0 calc(100% - 18px));
  --cut-sm:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,12px 100%,0 calc(100% - 12px));
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 03 BASE ---------- */
body{
  min-height:100vh;
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background-color:var(--ink);
  background-image:
    radial-gradient(900px 520px at 10% -8%,rgba(53,240,192,.10),transparent 62%),
    radial-gradient(760px 480px at 92% 4%,rgba(255,138,61,.08),transparent 60%),
    repeating-linear-gradient(90deg,rgba(43,58,82,.26) 0 1px,transparent 1px 88px),
    repeating-linear-gradient(0deg,rgba(43,58,82,.16) 0 1px,transparent 1px 88px);
  background-attachment:fixed,fixed,fixed,fixed;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,h6{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.1;
  letter-spacing:-.01em;
  color:var(--paper-2);
}
strong{color:var(--paper-2)}

/* ---------- 04 LAYOUT ---------- */
.container{width:min(1240px,calc(100% - 40px));margin-inline:auto}
.section{padding-block:clamp(48px,7vw,104px)}
.section--tight{padding-block:clamp(28px,4vw,56px)}
.stack{display:grid;gap:clamp(14px,2vw,22px)}
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2,.grid--3{grid-template-columns:1fr}
@media(min-width:720px){
  .grid--2,.grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(min-width:1080px){
  .grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
}
.band{
  background:linear-gradient(180deg,rgba(17,27,48,.96),rgba(17,27,48,.72));
  border-block:1px solid var(--line);
  padding-block:clamp(18px,3vw,30px);
}

/* ---------- 05 TYPE UTILITIES ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.22em;
  text-transform:uppercase;color:var(--teal);
}
.eyebrow::before{content:"";width:28px;height:2px;background:var(--orange);flex:0 0 auto}
.display{
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(2.2rem,6.2vw,4.9rem);
  line-height:1.04;letter-spacing:-.02em;
  margin-block:.32em;
  color:var(--paper-2);
}
.lede{
  max-width:38em;
  font-size:clamp(15px,1.55vw,18px);
  line-height:1.75;
  color:var(--text-dim);
}
.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.06em;
}
.text-dim{color:var(--text-dim)}

/* ---------- 06 BUTTONS ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  min-height:46px;padding:12px 24px;
  font-family:var(--font-display);font-weight:800;font-size:15px;letter-spacing:.02em;
  border:1px solid transparent;cursor:pointer;
  clip-path:var(--cut-sm);
  transition:background-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.btn--primary{background:var(--orange);color:#180A02}
.btn--primary:hover{background:#FFA468;transform:translateY(-2px)}
.btn--ghost{background:rgba(17,27,48,.72);border-color:var(--steel);color:var(--paper-2)}
.btn--ghost:hover{border-color:var(--teal);color:var(--teal);transform:translateY(-2px)}
.btn--teal{background:var(--teal);color:#04170F}
.btn--teal:hover{background:#6BF7D4;transform:translateY(-2px)}

/* ---------- 07 TAGS ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  color:var(--text-dim);
  background:rgba(43,58,82,.34);
  border:1px solid var(--line);
  white-space:nowrap;
}
.tag--teal{color:var(--teal);border-color:rgba(53,240,192,.42);background:rgba(53,240,192,.08)}
.tag--orange{color:var(--orange);border-color:rgba(255,138,61,.42);background:rgba(255,138,61,.08)}
.tag--magenta{color:var(--magenta);border-color:rgba(214,90,166,.44);background:rgba(214,90,166,.08)}

/* ---------- 08 PANELS ---------- */
.panel{
  position:relative;
  padding:clamp(18px,2.6vw,30px);
  background:var(--ink-2);
  border:1px solid var(--line);
}
.panel--cut{clip-path:var(--cut);border:0;box-shadow:inset 0 0 0 1px var(--line)}
.panel--paper{background:var(--paper);border-color:#D9C9A8;color:#182135}
.panel--paper .panel__title{color:#0B1424}
.panel__title{font-size:clamp(18px,2vw,22px);line-height:1.25;margin-bottom:10px}

/* ---------- 09 STATS ---------- */
.stat{border-top:2px solid var(--steel);padding-top:12px}
.stat__value{
  display:block;
  font-family:var(--font-mono);font-weight:600;
  font-size:clamp(28px,4.4vw,54px);line-height:1;
  color:var(--paper-2);letter-spacing:-.02em;
}
.stat__label{
  display:block;margin-top:8px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  color:var(--text-mute);
}

/* ---------- 10 MEDIA ---------- */
.media-frame{
  position:relative;overflow:hidden;
  aspect-ratio:16/10;
  background:var(--ink-2);
  border:1px solid var(--line-soft);
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--square{aspect-ratio:1/1}
.media-frame__img{
  width:100%;height:100%;object-fit:cover;
  filter:saturate(.9) contrast(1.08) brightness(.92);
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    linear-gradient(180deg,rgba(7,12,26,0) 42%,rgba(7,12,26,.78) 100%),
    repeating-linear-gradient(0deg,rgba(53,240,192,.07) 0 1px,transparent 1px 4px);
}
.media-frame__tag{
  position:absolute;left:0;bottom:0;z-index:2;
  padding:6px 12px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  color:var(--teal);
  background:rgba(7,12,26,.82);
  border-top:1px solid rgba(53,240,192,.35);
}
.media-grid{
  display:grid;gap:clamp(12px,2vw,20px);
  grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
}

/* ---------- 11 BREADCRUMB ---------- */
.breadcrumb{margin-bottom:clamp(18px,2.4vw,28px)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--text-mute)}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb__item:not(:last-child)::after{content:"/";color:var(--steel);font-family:var(--font-mono)}
.breadcrumb__link{color:var(--text-dim);transition:color .18s var(--ease)}
.breadcrumb__link:hover{color:var(--teal)}
.breadcrumb__item[aria-current="page"]{color:var(--paper)}

/* ---------- 12 SKIP LINK ---------- */
.skip-link{
  position:fixed;top:-120px;left:16px;z-index:200;
  padding:12px 20px;
  font-family:var(--font-display);font-weight:800;font-size:14px;
  background:var(--teal);color:#04170F;
  clip-path:var(--cut-sm);
  transition:top .18s var(--ease);
}
.skip-link:focus{top:14px}

/* ---------- 13 HEADER ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(7,12,26,.94);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.header-signal{
  height:3px;
  background:linear-gradient(90deg,
    var(--teal) 0 16%,
    var(--orange) 16% 24%,
    var(--magenta) 24% 30%,
    var(--steel) 30% 100%);
}
.header-bar{
  display:flex;align-items:center;gap:clamp(14px,2.4vw,36px);
  min-height:74px;padding-block:12px;
}

/* brand */
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.brand-mark{
  display:grid;place-items:center;
  width:42px;height:42px;
  font-family:var(--font-display);font-weight:900;font-size:20px;line-height:1;
  color:#04170F;
  background:linear-gradient(140deg,var(--teal),#1BA98B 78%);
  clip-path:polygon(0 0,100% 0,100% 68%,68% 100%,0 100%);
}
.brand-text{display:flex;flex-direction:column;gap:2px;line-height:1.05}
.brand-name{
  font-family:var(--font-display);font-weight:900;font-size:20px;
  letter-spacing:.08em;color:var(--paper-2);
}
.brand-sub{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;
  color:var(--text-mute);
}

/* nav */
.site-nav{margin-left:auto}
.nav-list{display:flex;align-items:center;gap:clamp(4px,1.2vw,16px)}
.nav-item{flex:0 0 auto}
.nav-link{
  position:relative;
  display:inline-flex;align-items:baseline;gap:7px;
  padding:12px 6px;
  font-size:15px;font-weight:500;white-space:nowrap;
  color:var(--text-dim);
  transition:color .2s var(--ease);
}
.nav-num{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.06em;
  color:var(--steel);transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:6px;right:6px;bottom:4px;height:2px;
  background:var(--teal);
  transform:scaleX(0);transform-origin:left center;
  transition:transform .22s var(--ease);
}
.nav-link:hover{color:var(--paper-2)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--teal)}
.nav-link[aria-current="page"] .nav-num{color:var(--orange)}
.nav-link[aria-current="page"]::after{
  transform:scaleX(1);
  background:linear-gradient(90deg,var(--teal),var(--orange));
}

/* toggle */
.nav-toggle{
  display:none;align-items:center;gap:10px;
  min-height:46px;padding:8px 16px;margin-left:auto;
  color:var(--paper-2);
  background:var(--ink-2);
  border:1px solid var(--steel);
  clip-path:var(--cut-sm);
  cursor:pointer;
}
.nav-toggle-lines{display:grid;gap:4px;width:18px}
.nav-toggle-lines i{display:block;height:2px;background:var(--teal);
  transition:transform .2s var(--ease),opacity .2s var(--ease)}
.nav-toggle-text{font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;color:var(--text-dim)}
.site-header[data-open] .nav-toggle-lines i:nth-child(1){transform:translateY(6px) rotate(45deg)}
.site-header[data-open] .nav-toggle-lines i:nth-child(2){opacity:0}
.site-header[data-open] .nav-toggle-lines i:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* progress */
.scroll-progress{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:transparent;pointer-events:none;
}
.scroll-progress > span{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--teal),var(--orange) 62%,var(--magenta));
  transition:width .12s linear;
}

@media(max-width:960px){
  .header-bar{min-height:66px;flex-wrap:wrap}
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;top:100%;left:0;right:0;
    margin-left:0;
    background:var(--ink-2);
    border-bottom:1px solid var(--steel);
    box-shadow:0 26px 50px -30px #000;
    max-height:calc(100vh - 90px);overflow-y:auto;
    display:none;
  }
  .site-header[data-open] .site-nav{display:block}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-item{border-bottom:1px solid var(--line-soft)}
  .nav-item:last-child{border-bottom:0}
  .nav-link{
    display:flex;justify-content:flex-start;
    padding:16px 22px;font-size:16px;color:var(--paper);
  }
  .nav-link::after{left:22px;right:auto;width:26px;bottom:8px}
  .nav-link[aria-current="page"]{background:rgba(53,240,192,.07)}
}

/* ---------- 14 FOOTER ---------- */
.site-footer{
  position:relative;
  background:#050A16;
  color:var(--text-dim);
  border-top:1px solid var(--line);
  margin-top:clamp(48px,8vw,120px);
}
.footer-pitch{
  height:clamp(28px,5vw,56px);
  border-bottom:1px solid rgba(53,240,192,.14);
  background-image:
    repeating-linear-gradient(115deg,rgba(53,240,192,.16) 0 2px,transparent 2px 26px),
    linear-gradient(100deg,var(--pitch) 0 34%,rgba(14,59,51,.35) 34% 40%,transparent 40%),
    linear-gradient(100deg,transparent 0 76%,rgba(255,138,61,.16) 76% 100%);
}
.footer-main{
  display:grid;
  grid-template-columns:minmax(240px,1.35fr) minmax(140px,.72fr) minmax(140px,.72fr) minmax(230px,1.15fr);
  gap:clamp(24px,3.4vw,48px);
  padding-block:clamp(36px,5vw,68px);
}
.footer-brand{display:flex;flex-direction:column;gap:20px;align-items:flex-start}
.footer-card{
  position:relative;
  width:100%;
  padding:22px 22px 26px;
  background:var(--paper);
  color:#182135;
  clip-path:var(--cut);
}
.footer-card::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:4px;
  background:linear-gradient(90deg,var(--teal),var(--orange) 60%,var(--magenta));
}
.footer-card__mono{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;
  color:#6B5B3F;
}
.footer-card__name{
  margin-top:8px;
  font-family:var(--font-display);font-weight:900;font-size:26px;
  letter-spacing:.06em;line-height:1.15;color:#0B1424;
}
.footer-card__line{margin-top:8px;font-size:13px;line-height:1.65;color:#3A4763}
.footer-cta{align-self:flex-start}

.footer-title{
  font-family:var(--font-mono);font-weight:500;
  font-size:11px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--teal);
  padding-bottom:10px;margin-bottom:12px;
  border-bottom:1px solid var(--line);
}
.footer-links{display:grid;gap:2px}
.footer-link{
  display:inline-block;padding:6px 0;
  font-size:14px;color:var(--text-dim);
  transition:color .18s var(--ease),transform .18s var(--ease);
}
.footer-link:hover{color:var(--paper-2);transform:translateX(3px)}
.footer-link[aria-current="page"]{color:var(--teal)}

.footer-contact{display:grid;gap:10px}
.footer-contact li{
  display:grid;gap:2px;
  padding-bottom:10px;
  font-size:13px;line-height:1.6;
  border-bottom:1px dashed rgba(43,58,82,.7);
}
.footer-contact li:last-child{border-bottom:0;padding-bottom:0}
.contact-label{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.18em;
  color:var(--text-mute);
}
.footer-contact .mono{font-size:13px;color:var(--paper-2);overflow-wrap:anywhere}

.footer-base{border-top:1px solid var(--line);background:rgba(7,12,26,.9)}
.footer-base__inner{
  display:flex;flex-wrap:wrap;gap:10px 28px;justify-content:space-between;align-items:center;
  padding-block:18px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;
  color:var(--text-mute);
}
.footer-copy,.footer-filing{margin:0}
.footer-filing{color:var(--steel)}

@media(max-width:1080px){
  .footer-main{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1 / -1}
}
@media(max-width:640px){
  .footer-main{grid-template-columns:1fr}
  .footer-card__name{font-size:22px}
  .footer-base__inner{justify-content:flex-start}
}

/* ---------- 15 SCROLL / REVEAL / TO TOP ---------- */
[data-reveal]{
  opacity:0;transform:translateY(14px);
  transition:opacity .4s var(--ease),transform .4s var(--ease);
}
[data-reveal].is-visible{opacity:1;transform:none}

.to-top{
  position:fixed;right:18px;bottom:18px;z-index:90;
  display:none;place-items:center;
  width:46px;height:46px;
  font-family:var(--font-mono);font-size:18px;line-height:1;
  color:var(--teal);
  background:var(--ink-2);
  border:1px solid var(--steel);
  clip-path:var(--cut-sm);
  cursor:pointer;
  transition:background-color .2s var(--ease),color .2s var(--ease);
}
.to-top:hover{background:var(--teal);color:#04170F}
.to-top[data-visible="true"]{display:grid}

/* ---------- 16 RESPONSIVE BASE ---------- */
@media(max-width:720px){
  .container{width:calc(100% - 32px)}
  html{scroll-padding-top:88px}
  .display{font-size:clamp(2rem,9vw,3.1rem)}
  .btn{min-height:48px;padding:12px 20px}
  .to-top{right:14px;bottom:14px}
}

/* ---------- 17 MOTION PREFERENCES ---------- */
@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;transform:none}
  .nav-link:hover{transform:none}
  .footer-link:hover{transform:none}
  .btn:hover{transform:none}
}