/* ==========================================================================
   login-weisi.com.cn — Site Kit
   01 tokens  02 reset  03 typography  04 layout  05 buttons & tags
   06 header  07 footer  08 components  09 utilities  10 responsive & a11y
   ========================================================================== */

/* 01 tokens ---------------------------------------------------------------- */
:root{
  --abyss:#061019;
  --panel:#0E1B26;
  --hair:#1E2E3B;
  --fog:#E9F0F5;
  --muted:#94A7B5;
  --cyan:#33E0C6;
  --amber:#F0A93C;
  --bone:#F6F4F1;
  --teal:#0B3B39;
  --redline:#E2685F;
  --link-quiet:#C7D5DE;
  --dim:#5C7181;
  --line-cyan:rgba(51,224,198,.42);
  --line-amber:rgba(240,169,60,.42);
  --shell:1240px;
  --gutter:clamp(16px,4vw,40px);
  --gap:clamp(14px,2vw,24px);
  --header-h:76px;
  --header-h-sm:56px;
  --sans:"Archivo","Helvetica Neue","PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --mono:ui-monospace,SFMono-Regular,"JetBrains Mono",Menlo,Consolas,"Liberation Mono",monospace;
}

/* 02 reset ----------------------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--abyss);
  color:var(--fog);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background-image:
    repeating-linear-gradient(90deg, rgba(233,240,245,.03) 0 1px, transparent 1px 120px),
    repeating-linear-gradient(0deg, rgba(233,240,245,.02) 0 1px, transparent 1px 120px);
}
body.nav-open{overflow:hidden;}
img,svg{display:block;max-width:100%;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;}
input{font:inherit;color:inherit;}
ul,ol{list-style:none;margin:0;padding:0;}
h1,h2,h3,h4,p,figure,blockquote,dl,dd{margin:0;}
hr{border:0;border-top:1px solid var(--hair);margin:0;}
#main-content{scroll-margin-top:calc(var(--header-h-sm) + 16px);}

/* 03 typography ------------------------------------------------------------ */
.mono{font-family:var(--mono);font-size:12px;letter-spacing:.04em;}
.display{
  font-weight:800;
  font-size:clamp(40px,6vw,92px);
  line-height:.95;
  letter-spacing:-.01em;
}
.index-label{
  display:inline-block;
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--muted);
}
.section-title{
  font-size:clamp(22px,3vw,34px);
  font-weight:700;
  line-height:1.2;
  letter-spacing:-.01em;
}
.measure{max-width:34em;}
.prose{
  max-width:38em;
  font-size:15.5px;
  line-height:1.85;
  color:var(--muted);
}
.prose h2,.prose h3{color:var(--fog);line-height:1.3;margin:1.6em 0 .6em;}
.prose p{margin-bottom:1em;}
.prose a{color:var(--cyan);border-bottom:1px solid var(--line-cyan);}
.prose a:hover{background:rgba(51,224,198,.1);}
.prose li{position:relative;padding-left:18px;margin-bottom:.4em;}
.prose li::before{content:"—";position:absolute;left:0;color:var(--hair);}
.path-code{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--cyan);
}

/* 04 layout ---------------------------------------------------------------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{
  padding-block:clamp(40px,6vw,88px);
  border-top:1px solid var(--hair);
}
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:10px 20px;
  margin-bottom:clamp(20px,3vw,36px);
}
.grid{display:grid;gap:var(--gap);}
.grid-12{grid-template-columns:repeat(12,minmax(0,1fr));}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr));}
.col-3{grid-column:span 3;}
.col-4{grid-column:span 4;}
.col-5{grid-column:span 5;}
.col-6{grid-column:span 6;}
.col-7{grid-column:span 7;}
.col-8{grid-column:span 8;}
.col-12{grid-column:span 12;}

/* 05 buttons & tags -------------------------------------------------------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 18px;
  border:1px solid var(--hair);
  background:transparent;
  color:var(--fog);
  font-family:var(--sans);
  font-size:13px;
  letter-spacing:.02em;
  line-height:1.2;
  cursor:pointer;
  transition:border-color 120ms ease,background-color 120ms ease,color 120ms ease,transform 120ms ease;
}
.btn:hover{border-color:var(--cyan);color:var(--cyan);transform:translateY(-2px);}
.btn-primary{
  background:var(--teal);
  border-color:var(--line-cyan);
  color:var(--cyan);
}
.btn-primary:hover{
  background:var(--cyan);
  border-color:var(--cyan);
  color:var(--abyss);
}
.btn-ghost{border-color:rgba(233,240,245,.22);color:var(--link-quiet);}
.btn-ghost:hover{border-color:var(--amber);color:var(--amber);}
.btn-quiet{
  padding:6px 10px;
  border-color:transparent;
  color:var(--muted);
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.06em;
}
.btn-quiet:hover{border-color:var(--hair);color:var(--cyan);transform:none;background:rgba(51,224,198,.06);}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 8px;
  border:1px solid var(--hair);
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--muted);
  line-height:1.5;
}
.tag--cyan{color:var(--cyan);border-color:var(--line-cyan);background:rgba(51,224,198,.07);}
.tag--amber{color:var(--amber);border-color:var(--line-amber);background:rgba(240,169,60,.08);}
.tag--bone{background:var(--bone);border-color:var(--bone);color:var(--abyss);}

/* 06 header ---------------------------------------------------------------- */
.skip-link{
  position:fixed;
  top:-100px;
  left:var(--gutter);
  z-index:200;
  padding:10px 16px;
  background:var(--cyan);
  color:var(--abyss);
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.06em;
  transition:top 140ms ease;
}
.skip-link:focus{top:10px;}

.site-header{
  position:sticky;
  top:0;
  z-index:80;
  border-bottom:1px solid var(--hair);
  transition:border-color 180ms ease;
}
.site-header::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:-1;
  background:rgba(6,16,25,.9);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
}
.site-header.is-condensed{border-bottom-color:rgba(51,224,198,.28);}

.header-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  display:block;
  background:transparent;
  overflow:hidden;
  pointer-events:none;
}
.header-progress-bar{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--cyan),var(--amber));
  transition:width 90ms linear;
}

.header-inner{
  position:relative;
  z-index:2;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:clamp(12px,2vw,32px);
  height:var(--header-h);
  transition:height 180ms ease;
}
.site-header.is-condensed .header-inner{height:var(--header-h-sm);}

.header-left,
.header-right{display:flex;align-items:center;gap:clamp(10px,1.4vw,20px);min-width:0;}

.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  display:grid;
  place-items:center;
  width:32px;
  height:32px;
  border:1px solid var(--line-cyan);
  background:rgba(51,224,198,.07);
  color:var(--cyan);
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.06em;
}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-name{font-size:15px;font-weight:600;letter-spacing:.03em;}
.brand-sub{
  font-family:var(--mono);
  font-size:10px;
  letter-spacing:.14em;
  color:var(--dim);
}
.site-header.is-condensed .brand-sub{display:none;}

.version-switch{
  display:flex;
  align-items:center;
  gap:2px;
  padding:2px;
  border:1px solid var(--hair);
  background:rgba(14,27,38,.8);
}
.ver-label{
  font-family:var(--mono);
  font-size:10px;
  letter-spacing:.16em;
  color:var(--amber);
  padding-inline:6px;
}
.ver-btn{
  padding:3px 8px;
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.04em;
  color:var(--muted);
  cursor:pointer;
  transition:background-color 180ms ease,color 180ms ease,box-shadow 180ms ease;
}
.ver-btn:hover{color:var(--fog);background:rgba(51,224,198,.08);}
.ver-btn[aria-pressed="true"]{
  background:var(--teal);
  color:var(--cyan);
  box-shadow:inset 0 0 0 1px var(--line-cyan);
}

.header-search{display:none;}

.site-nav{display:flex;align-items:center;}
.nav-list{display:flex;align-items:center;gap:clamp(12px,1.6vw,24px);}
.nav-link{
  position:relative;
  display:inline-block;
  padding:6px 2px;
  font-size:14px;
  color:var(--link-quiet);
  white-space:nowrap;
  transition:color 120ms ease;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:1px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform 120ms ease;
}
.nav-link:hover{color:var(--fog);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link[aria-current="page"]{color:var(--cyan);}
.nav-link[aria-current="page"]::after{transform:scaleX(1);}

.nav-note,
.nav-cta{display:none;}

.header-cta{display:none;flex:0 0 auto;}

.nav-toggle{
  display:none;
  width:40px;
  height:40px;
  align-items:center;
  justify-content:center;
  border:1px solid var(--hair);
  cursor:pointer;
  transition:border-color 120ms ease;
}
.nav-toggle:hover{border-color:var(--cyan);}
.nav-toggle-bars{
  position:relative;
  display:block;
  width:16px;
  height:1px;
  background:var(--fog);
  box-shadow:0 5px 0 var(--fog),0 -5px 0 var(--fog);
  transition:transform 180ms ease,box-shadow 180ms ease,background-color 180ms ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars{
  background:var(--cyan);
  box-shadow:none;
  transform:rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{
  content:"";
  position:absolute;
  inset:0;
  background:var(--cyan);
  transform:rotate(90deg);
}

.nav-scrim{
  position:fixed;
  inset:0;
  z-index:1;
  background:rgba(3,8,13,.66);
}
.nav-scrim[hidden]{display:none;}

/* 07 footer ---------------------------------------------------------------- */
.site-footer{
  margin-top:clamp(48px,7vw,96px);
  background:#040C14;
  border-top:1px solid var(--hair);
  color:var(--muted);
}
.footer-inner{padding-block:clamp(36px,5vw,64px) clamp(20px,3vw,28px);}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.35fr;
  gap:clamp(20px,3vw,40px);
  padding-bottom:clamp(22px,3vw,36px);
  border-bottom:1px solid var(--hair);
}
.footer-brand .brand{margin-bottom:14px;}
.footer-tagline{font-size:14px;line-height:1.7;color:var(--muted);max-width:24em;}
.footer-stamp{
  margin-top:12px;
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--dim);
}
.footer-col-title{
  margin-bottom:14px;
  font-family:var(--mono);
  font-size:11px;
  font-weight:400;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--dim);
}
.footer-links li + li{margin-top:7px;}
.footer-link{
  display:inline-block;
  font-size:14px;
  color:var(--link-quiet);
  transition:color 120ms ease,transform 120ms ease;
}
.footer-link:hover{color:var(--cyan);transform:translateX(2px);}
.contact-row{display:flex;flex-direction:column;gap:1px;margin-bottom:11px;}
.contact-label{
  font-family:var(--mono);
  font-size:10px;
  letter-spacing:.16em;
  color:var(--dim);
}
.contact-value{
  font-family:var(--mono);
  font-size:12.5px;
  line-height:1.65;
  letter-spacing:.02em;
  color:var(--link-quiet);
  overflow-wrap:anywhere;
}
.footer-note{
  margin-top:18px;
  font-size:12.5px;
  line-height:1.7;
  color:var(--dim);
  max-width:64em;
}
.footer-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 24px;
  margin-top:18px;
  padding-top:16px;
  border-top:1px solid var(--hair);
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--dim);
}
.footer-top{margin-left:auto;color:var(--cyan);}
.footer-top:hover{text-decoration:underline;text-underline-offset:4px;}

/* 08 components ------------------------------------------------------------ */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding-block:6px 18px;
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--dim);
}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px;}
.breadcrumb li + li::before{content:"/";color:var(--hair);}
.breadcrumb a{transition:color 120ms ease;}
.breadcrumb a:hover{color:var(--cyan);}
.breadcrumb [aria-current="page"]{color:var(--fog);}

.panel{
  background:var(--panel);
  border:1px solid var(--hair);
  padding:clamp(16px,2.4vw,28px);
}
.panel--interactive{
  transition:border-color 120ms ease,box-shadow 120ms ease,transform 120ms ease;
}
.panel--interactive:hover{
  border-color:var(--line-cyan);
  box-shadow:0 1px 0 rgba(51,224,198,.16);
  transform:translateY(-2px);
}
.panel--bone{background:var(--bone);color:var(--abyss);border-color:var(--bone);}
.panel--bone .index-label,
.panel--bone .prose{color:#41525E;}

.data-table{
  width:100%;
  border-collapse:collapse;
  font-size:14px;
  line-height:1.7;
}
.data-table caption{
  caption-side:top;
  text-align:left;
  padding-bottom:10px;
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--dim);
}
.data-table th{
  padding:10px 12px;
  text-align:left;
  font-family:var(--mono);
  font-size:11px;
  font-weight:400;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--muted);
  border-bottom:1px solid var(--hair);
  white-space:nowrap;
}
.data-table td{
  padding:12px;
  border-bottom:1px solid var(--hair);
  vertical-align:top;
}
.data-table tbody tr:hover td{background:rgba(51,224,198,.05);}
.data-table--bone{background:var(--bone);color:var(--abyss);}
.data-table--bone th{color:#51636F;border-bottom-color:#D9D4CD;}
.data-table--bone td{border-bottom-color:#E4DFD8;}
.data-table--bone tbody tr:hover td{background:rgba(6,16,25,.04);}
.table-scroll{overflow-x:auto;}

.media-frame{
  position:relative;
  overflow:hidden;
  margin:0;
  border:1px solid var(--hair);
  background:linear-gradient(180deg,#0B1620,#08131C);
  aspect-ratio:16 / 10;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    repeating-linear-gradient(90deg, rgba(233,240,245,.05) 0 1px, transparent 1px 40px);
  opacity:.5;
}
.media-frame img,
.media-frame picture > img{
  width:100%;
  height:100%;
  object-fit:cover;
  object-position:center;
}
.media-frame figcaption{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  z-index:1;
  padding:8px 12px;
  background:rgba(6,16,25,.78);
  border-top:1px solid var(--hair);
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.06em;
  color:var(--muted);
}
.media-frame--wide{aspect-ratio:21 / 9;}
.media-frame--square{aspect-ratio:1 / 1;}
.media-frame--tall{aspect-ratio:3 / 4;}

/* 09 utilities ------------------------------------------------------------- */
.sr-only{
  position:absolute;
  width:1px;
  height:1px;
  padding:0;
  margin:-1px;
  overflow:hidden;
  clip:rect(0 0 0 0);
  clip-path:inset(50%);
  white-space:nowrap;
  border:0;
}
.text-muted{color:var(--muted);}
.text-dim{color:var(--dim);}
.text-cyan{color:var(--cyan);}
.text-amber{color:var(--amber);}
.stack > * + *{margin-top:var(--gap);}

/* 10 focus / motion / responsive ------------------------------------------ */
:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:2px;
}
a:focus-visible,
button:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;}

@media (min-width:961px){
  .header-cta{display:inline-flex;}
}

@media (min-width:1180px){
  .header-search{
    display:flex;
    align-items:center;
    height:36px;
    width:0;
    padding-right:4px;
    border:1px solid var(--hair);
    background:#08131C;
    opacity:0;
    visibility:hidden;
    overflow:hidden;
    transition:width 200ms ease,opacity 160ms ease,visibility 200ms ease,border-color 120ms ease;
  }
  .site-header.is-condensed .header-search{
    width:264px;
    opacity:1;
    visibility:visible;
  }
  .header-search:focus-within{
    border-color:var(--cyan);
    box-shadow:0 0 0 1px rgba(51,224,198,.28);
  }
  .header-search-input{
    flex:1 1 auto;
    min-width:0;
    height:100%;
    padding:0 10px;
    border:0;
    background:transparent;
    font-family:var(--mono);
    font-size:12px;
    letter-spacing:.04em;
    color:var(--fog);
    outline:none;
    -webkit-appearance:none;
    appearance:none;
  }
  .header-search-input::placeholder{color:var(--dim);}
  .header-search-input::-webkit-search-cancel-button{-webkit-appearance:none;appearance:none;}
  .header-search-go{
    flex:0 0 auto;
    padding:6px 9px;
    border:1px solid var(--line-cyan);
    font-family:var(--mono);
    font-size:11px;
    letter-spacing:.08em;
    color:var(--cyan);
    transition:background-color 120ms ease,color 120ms ease;
  }
  .header-search-go:hover{background:var(--cyan);color:var(--abyss);}
}

@media (max-width:1180px){
  .header-search{display:none;}
}

@media (max-width:1000px){
  .col-3,.col-4{grid-column:span 6;}
  .col-5,.col-7,.col-8{grid-column:span 12;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}

@media (max-width:960px){
  .header-inner{height:64px;}
  .site-header.is-condensed .header-inner{height:var(--header-h-sm);}
  .nav-toggle{display:inline-flex;}
  .header-cta{display:none;}

  .site-nav{
    position:fixed;
    top:0;
    right:0;
    bottom:0;
    z-index:3;
    width:min(86vw,340px);
    display:flex;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:0;
    padding:calc(64px + 28px) 24px 28px;
    background:#08131C;
    border-left:1px solid var(--hair);
    transform:translateX(102%);
    visibility:hidden;
    overflow-y:auto;
    transition:transform 220ms ease,visibility 220ms ease;
  }
  .site-nav[data-open="true"]{
    transform:translateX(0);
    visibility:visible;
  }
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    border-top:1px solid var(--hair);
  }
  .nav-list li{border-bottom:1px solid var(--hair);}
  .nav-link{
    display:block;
    padding:14px 2px;
    font-size:16px;
  }
  .nav-link::after{display:none;}
  .nav-note{
    display:block;
    margin-top:18px;
    font-family:var(--mono);
    font-size:11px;
    letter-spacing:.1em;
    color:var(--dim);
  }
  .nav-note span{color:var(--amber);}
  .nav-cta{
    display:inline-flex;
    margin-top:18px;
    width:100%;
  }
  .nav-scrim{display:block;}
}

@media (min-width:961px){
  .nav-scrim{display:none;}
  .nav-note{display:none;}
}

@media (max-width:760px){
  .brand-sub{display:none;}
  .version-switch{padding:1px;}
  .ver-label{display:none;}
  .grid-2,.grid-3{grid-template-columns:1fr;}
  .grid-12{grid-template-columns:repeat(2,minmax(0,1fr));}
  .col-3,.col-4,.col-5,.col-6,.col-7,.col-8{grid-column:span 2;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .footer-top{margin-left:0;}
}

@media (max-width:420px){
  .brand-name{font-size:14px;}
  .ver-btn{padding:3px 6px;font-size:10.5px;}
}

@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,
  .panel--interactive:hover,
  .footer-link:hover{transform:none;}
  .header-progress-bar{transition:none;}
}