/* ==========================================================================
   德赢体育安装 · 共享外壳样式表  /assets/site.css
   基调：深空黑终端底色 + 暖纸色内容板 + 荧光绿行动点
   ========================================================================== */

/* ---------- 1. tokens ---------- */
:root{
  --ink:#0B0E0D;
  --ink-2:#1A1F1C;
  --ink-3:#121715;
  --paper:#F2EDE3;
  --paper-2:#FBFAF6;
  --paper-3:#DCD3C4;
  --cold:#16323F;
  --lime:#C6FF3D;
  --blue:#2F7BFF;
  --orange:#FF5B23;
  --muted:#7A857F;
  --line:rgba(242,237,227,.14);
  --line-strong:rgba(242,237,227,.28);
  --rail:272px;
  --shell:1240px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

/* ---------- 2. reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{margin:0;padding:0}
ul,ol{list-style:none}
h1,h2,h3,h4,h5{font-size:inherit;font-weight:inherit;line-height:1.2}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
img,svg,video{display:block;max-width:100%}
table{border-collapse:collapse;width:100%}
[hidden]{display:none !important}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px;border-radius:2px}

/* ---------- 3. base typography ---------- */
body{
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:17px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.004em;
  min-height:100vh;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
p{max-width:38em}
strong,b{font-weight:800;color:var(--paper)}
em{font-style:normal;color:var(--lime)}
code,kbd,samp,time{font-family:var(--font-mono);font-size:.92em}

/* ---------- 4. shell ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:clamp(16px,4vw,48px);
}

/* ---------- 5. skip link ---------- */
.skip-link{
  position:absolute;
  left:14px;
  top:-90px;
  z-index:200;
  padding:10px 18px;
  background:var(--lime);
  color:var(--ink);
  font-size:14px;
  font-weight:800;
  letter-spacing:.04em;
  border-radius:2px;
  transition:top .18s var(--ease);
}
.skip-link:focus{top:14px}

/* ---------- 6. buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  border:1px solid transparent;
  border-radius:2px;
  font-size:15px;
  font-weight:800;
  letter-spacing:.03em;
  line-height:1.2;
  white-space:nowrap;
  transition:transform .22s var(--ease),background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.btn:hover{transform:translate(2px,-2px)}
.btn--install{
  background:var(--lime);
  color:var(--ink);
  padding-right:24px;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
}
.btn--install:hover{background:#D6FF69}
.btn--ghost{
  border-color:var(--line-strong);
  color:var(--paper);
  background:transparent;
}
.btn--ghost:hover{border-color:var(--lime);color:var(--lime)}

/* ---------- 7. header / side rail ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:var(--ink);
  color:var(--paper);
  border-bottom:1px solid var(--line);
}
.hdr-top{
  display:flex;
  align-items:center;
  gap:10px;
  padding:12px clamp(16px,4vw,24px);
}
.brand{
  display:flex;
  align-items:center;
  gap:11px;
  min-width:0;
  margin-right:auto;
  color:inherit;
}
.brand-mark{
  flex:0 0 auto;
  display:grid;
  place-items:center;
  width:36px;
  height:36px;
  background:var(--lime);
  color:var(--ink);
  font-size:19px;
  font-weight:900;
  line-height:1;
  clip-path:polygon(0 0,100% 0,100% 70%,70% 100%,0 100%);
}
.brand-text{display:flex;flex-direction:column;gap:1px;min-width:0}
.brand-name{
  font-size:16px;
  font-weight:900;
  letter-spacing:-.01em;
  line-height:1.25;
  white-space:nowrap;
}
.brand-tag{
  font-family:var(--font-mono);
  font-size:9.5px;
  letter-spacing:.2em;
  line-height:1.3;
  color:var(--muted);
  white-space:nowrap;
}
.brand--footer{margin-right:0}
.brand--footer .brand-mark{width:34px;height:34px;font-size:18px}
.brand--footer .brand-name{font-size:17px}

.hdr-cta{flex:0 0 auto}

.nav-toggle{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:10px 13px;
  border:1px solid var(--line-strong);
  border-radius:2px;
  font-size:13px;
  font-weight:800;
  letter-spacing:.1em;
  color:var(--paper);
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--lime);color:var(--lime)}
.nav-toggle-bars{
  position:relative;
  display:block;
  width:18px;
  height:2px;
  border-radius:1px;
  background:currentColor;
  transition:background-color .2s var(--ease);
}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;
  height:2px;
  border-radius:1px;
  background:currentColor;
  transition:transform .24s var(--ease);
}
.nav-toggle-bars::before{top:-6px}
.nav-toggle-bars::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{transform:translateY(-6px) rotate(-45deg)}

/* mobile drawer */
.site-nav{
  position:absolute;
  left:0;
  right:0;
  top:100%;
  background:var(--ink);
  border-bottom:1px solid var(--line);
  max-height:0;
  overflow:hidden;
  visibility:hidden;
  transition:max-height .34s var(--ease),visibility .34s var(--ease);
}
.site-nav[data-open]{
  max-height:76vh;
  overflow-y:auto;
  visibility:visible;
  box-shadow:0 28px 52px rgba(0,0,0,.6);
}
.nav-list{padding:6px clamp(16px,4vw,24px) 20px}
.nav-item+.nav-item{border-top:1px solid rgba(242,237,227,.08)}
.nav-link{
  display:flex;
  align-items:baseline;
  gap:12px;
  padding:14px 0;
  font-size:18px;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--paper);
  transition:color .2s var(--ease);
}
.nav-idx{
  order:2;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--muted);
}
.nav-label{flex:1}
.nav-link[aria-current="page"]{color:var(--lime)}
.nav-link[aria-current="page"] .nav-idx{color:var(--lime)}

.hdr-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  background:rgba(242,237,227,.08);
  pointer-events:none;
}
.hdr-progress > span{
  display:block;
  width:100%;
  height:100%;
  background:linear-gradient(90deg,var(--lime),var(--blue));
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .12s linear;
}

/* ---------- 8. breadcrumb ---------- */
.crumb{
  padding-block:22px 4px;
  font-size:13px;
  color:var(--muted);
}
.crumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.crumb-list li{display:flex;align-items:center;gap:6px}
.crumb-list li+li::before{
  content:"/";
  font-family:var(--font-mono);
  color:rgba(242,237,227,.3);
}
.crumb-list a{color:rgba(242,237,227,.7);transition:color .2s var(--ease)}
.crumb-list a:hover{color:var(--lime)}

/* ---------- 9. sections ---------- */
.section{position:relative;padding-block:clamp(56px,8vw,104px)}
.section--tight{padding-block:clamp(30px,4vw,54px)}
.section--paper{background:var(--paper);color:var(--ink)}
.section--cold{background:var(--cold);color:var(--paper)}
.section--paper .section-note{color:#5C655F}
.section--paper .tag-chip{border-color:rgba(11,14,13,.2);color:rgba(11,14,13,.72)}
.section--paper .tag-chip:hover{border-color:var(--ink);color:var(--ink)}
.section--paper .tag-chip[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:var(--lime)}

.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:10px 22px;
  margin-bottom:clamp(24px,4vw,42px);
}
.section-idx{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.24em;
  color:var(--lime);
  padding-top:.5em;
}
.section--paper .section-idx{color:var(--orange)}
.section-title{
  font-size:clamp(30px,4.4vw,52px);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.06;
}
.section-note{
  flex:1 1 220px;
  min-width:190px;
  font-size:14px;
  line-height:1.7;
  color:var(--muted);
  max-width:34ch;
}

/* ---------- 10. boards ---------- */
.board{
  position:relative;
  background:var(--ink-2);
  border:1px solid var(--line);
  padding:clamp(20px,3vw,32px);
}
.board--cut{
  border:0;
  background:linear-gradient(152deg,#1A1F1C 0%,#121715 100%);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 24px),calc(100% - 24px) 100%,0 100%);
}
.board--paper{
  background:var(--paper);
  color:var(--ink);
  border:0;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 24px),calc(100% - 24px) 100%,0 100%);
}
.board--lime{
  background:var(--lime);
  color:var(--ink);
  border:0;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 24px),calc(100% - 24px) 100%,0 100%);
}
.board--paper .metric-value,.board--lime .metric-value{color:var(--ink)}
.board--paper .metric-unit,.board--paper .metric-label,
.board--lime .metric-unit,.board--lime .metric-label{color:rgba(11,14,13,.62)}

/* ---------- 11. tags / filters ---------- */
.tag-row{display:flex;flex-wrap:wrap;gap:8px}
.tag-chip{
  padding:7px 15px;
  border:1px solid var(--line);
  border-radius:999px;
  font-size:13px;
  font-weight:700;
  letter-spacing:.05em;
  color:rgba(242,237,227,.72);
  transition:background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.tag-chip:hover{border-color:var(--lime);color:var(--lime);transform:translateY(-2px)}
.tag-chip[aria-pressed="true"]{background:var(--lime);border-color:var(--lime);color:var(--ink)}

/* ---------- 12. metrics ---------- */
.metric{display:flex;flex-direction:column;gap:4px}
.metric-value{
  font-family:var(--font-mono);
  font-size:clamp(34px,6vw,76px);
  font-weight:700;
  line-height:1;
  letter-spacing:-.035em;
  color:var(--lime);
}
.metric-unit{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--muted);
}
.metric-label{
  font-size:13px;
  letter-spacing:.06em;
  color:var(--muted);
}

/* ---------- 13. index list ---------- */
.idx-list{display:flex;flex-direction:column}
.idx-item{
  display:grid;
  grid-template-columns:auto 1fr auto;
  gap:6px 14px;
  align-items:baseline;
  padding:14px 0;
  border-top:1px solid var(--line);
  transition:background-color .2s var(--ease);
}
.idx-item:last-child{border-bottom:1px solid var(--line)}
.idx-item:hover{background:rgba(198,255,61,.05)}
.idx-num{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--lime);
}
.idx-title{font-size:17px;font-weight:700;letter-spacing:-.005em}
.idx-meta{
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--muted);
}
.section--paper .idx-item{border-color:rgba(11,14,13,.16)}
.section--paper .idx-num{color:var(--orange)}
.section--paper .idx-title{color:var(--ink)}
.section--paper .idx-meta{color:#7A857F}

/* ---------- 14. media frame ---------- */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  background:var(--ink-2);
  border:1px solid var(--line);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 20px),calc(100% - 20px) 100%,0 100%);
}
.media-frame > img,
.media-frame > svg,
.media-frame > video{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--photo{aspect-ratio:4/3}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-frame--strip{aspect-ratio:21/9}
.media-frame__tag{
  position:absolute;
  left:0;
  bottom:0;
  z-index:2;
  padding:6px 12px;
  background:var(--lime);
  color:var(--ink);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
}

/* ---------- 15. decorative ---------- */
.vertical-note{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.34em;
  color:var(--muted);
  text-transform:uppercase;
}
.track-line{
  display:block;
  width:100%;
  height:auto;
  overflow:visible;
}
.track-line path,
.track-line line,
.track-line polyline{
  fill:none;
  stroke:var(--lime);
  stroke-width:1.5;
  stroke-dasharray:6 8;
  stroke-linecap:round;
}
.track-line circle,
.track-line ellipse{fill:var(--ink);stroke:var(--lime);stroke-width:1.5}
.track-line--dim path,
.track-line--dim line,
.track-line--dim polyline{stroke:rgba(242,237,227,.22)}
.track-line--blue path,
.track-line--blue line,
.track-line--blue polyline{stroke:var(--blue)}

/* ---------- 16. reveal ---------- */
.reveal{transition:opacity .62s var(--ease),transform .62s var(--ease)}
.js .reveal:not(.is-in){opacity:0;transform:translateY(22px)}

/* ---------- 17. footer ---------- */
.site-footer{
  position:relative;
  margin-top:96px;
  padding:64px 0 0;
  background:linear-gradient(178deg,#0B0E0D 0%,#10222B 54%,#16323F 100%);
  color:var(--paper);
}
.site-footer::before{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:-30px;
  height:30px;
  background:linear-gradient(90deg,var(--lime) 0 28%,var(--blue) 28% 40%,var(--orange) 40% 50%,rgba(242,237,227,.1) 50% 100%);
  clip-path:polygon(0 100%,0 62%,100% 0,100% 100%);
}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:38px 32px;
  padding-bottom:46px;
}
.footer-col{min-width:0}
.footer-brand{display:flex;flex-direction:column;gap:14px}
.footer-tagline{
  font-size:14px;
  line-height:1.8;
  color:rgba(242,237,227,.6);
  max-width:34ch;
}
.footer-note{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.14em;
  color:var(--muted);
}
.footer-title{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--lime);
  padding-bottom:10px;
  margin-bottom:16px;
  border-bottom:1px solid rgba(242,237,227,.16);
}
.footer-list{display:flex;flex-direction:column;gap:11px}
.footer-list a{
  font-size:15px;
  line-height:1.6;
  color:rgba(242,237,227,.78);
  transition:color .2s var(--ease),transform .2s var(--ease);
  display:inline-block;
}
.footer-list a:hover{color:var(--lime);transform:translateX(3px)}
.footer-contact li{display:flex;flex-direction:column;gap:3px}
.footer-key{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.2em;
  color:var(--muted);
  text-transform:uppercase;
}
.footer-val{
  font-size:15px;
  line-height:1.65;
  color:rgba(242,237,227,.86);
  word-break:break-word;
}
.footer-val--mono{font-family:var(--font-mono);font-size:14px;letter-spacing:.01em}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 26px;
  padding-block:22px 30px;
  border-top:1px solid rgba(242,237,227,.14);
  font-size:13px;
  color:rgba(242,237,227,.55);
}
.footer-meta{font-family:var(--font-mono);font-size:12.5px;letter-spacing:.02em}
.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 20px;
  margin-left:auto;
}
.footer-legal a{
  color:rgba(242,237,227,.72);
  border-bottom:1px solid rgba(242,237,227,.24);
  padding-bottom:1px;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer-legal a:hover{color:var(--lime);border-color:var(--lime)}
.footer-icp{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:rgba(242,237,227,.45);
}

/* ---------- 18. breakpoints ---------- */
@media (min-width:640px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:1024px){
  body{padding-left:var(--rail)}
  .site-header{
    position:fixed;
    inset:0 auto 0 0;
    width:var(--rail);
    display:flex;
    flex-direction:column;
    padding:30px 26px;
    border-bottom:0;
    border-right:1px solid var(--line);
    overflow-y:auto;
    overflow-x:hidden;
  }
  .hdr-top{display:block;padding:0}
  .brand{margin-right:0;align-items:flex-start}
  .brand-name{font-size:18px}
  .brand-tag{font-size:10px;letter-spacing:.22em}
  .nav-toggle{display:none}
  .hdr-cta{
    position:absolute;
    left:26px;
    right:26px;
    bottom:32px;
    width:auto;
  }
  .site-nav{
    position:static;
    display:block;
    flex:1 1 auto;
    margin-top:46px;
    max-height:none;
    overflow:visible;
    visibility:visible;
    background:transparent;
    border:0;
    box-shadow:none;
  }
  .nav-list{position:relative;padding:0}
  .nav-list::before{
    content:"";
    position:absolute;
    left:5px;
    top:16px;
    bottom:16px;
    width:1px;
    background:linear-gradient(180deg,rgba(198,255,61,.55),rgba(242,237,227,.14) 42%,rgba(242,237,227,.06));
  }
  .nav-item{border:0}
  .nav-item+.nav-item{border-top:0}
  .nav-link{
    position:relative;
    padding:11px 0 11px 26px;
    font-size:16px;
    font-weight:700;
    color:rgba(242,237,227,.66);
    transition:color .2s var(--ease),transform .2s var(--ease);
  }
  .nav-link::before{
    content:"";
    position:absolute;
    left:2px;
    top:50%;
    width:7px;
    height:7px;
    margin-top:-3.5px;
    background:var(--ink);
    border:1px solid rgba(242,237,227,.38);
    transform:rotate(45deg);
    transition:background-color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
  }
  .nav-link:hover{color:var(--paper);transform:translateX(4px)}
  .nav-link:hover::before{border-color:var(--lime)}
  .nav-link[aria-current="page"]{color:var(--lime);font-weight:900}
  .nav-link[aria-current="page"]::before{
    background:var(--lime);
    border-color:var(--lime);
    transform:rotate(45deg) scale(1.2);
  }
  .nav-link[aria-current="page"] .nav-idx{color:rgba(198,255,61,.78)}
  .footer-grid{grid-template-columns:1.45fr 1fr 1fr 1.35fr;gap:40px}
  .footer-bottom{padding-block:24px 34px}
}
@media (min-width:1280px){
  :root{--shell:1320px}
}

/* ---------- 19. reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .btn:hover{transform:none}
  .footer-list a:hover{transform:none}
  .nav-link:hover{transform:none}
  .js .reveal:not(.is-in){opacity:1;transform:none}
}