:root{
  --bg:#F5F2E9;
  --bg-alt:#0A1B2E;
  --ink:#2B2620;
  --ink-soft:#4A3F35;
  --orange:#E05C3A;
  --orange-soft:#F2A07B;
  --lime:#C8F04F;
  --metal:#B0B7C3;
  --brown:#D6CBB8;
  --glass:rgba(255,255,255,0.72);
  --yellow:#E9C46A;
  --line:rgba(43,38,32,0.14);
  --font-head:"FZLanTingHeiS-DB-GB","Microsoft YaHei","PingFang SC",sans-serif;
  --font-body:"Noto Serif SC","Songti SC","STSong",serif;
  --font-index:"Courier New","Roboto Mono","SFMono-Regular",monospace;
  --radius:2px;
  --ease:cubic-bezier(0.2,0.7,0.2,1);
  --container:1280px;
  --gutter:clamp(18px,4vw,40px);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  background-color:var(--bg);
  background-image:
    linear-gradient(rgba(176,183,203,0.12) 1px,transparent 1px),
    linear-gradient(90deg,rgba(176,183,203,0.12) 1px,transparent 1px);
  background-size:32px 32px;
  color:var(--ink);
  font-family:var(--font-body);
  font-size:15px;
  line-height:1.75;
  min-height:100vh;
}
img{display:block;max-width:100%}
ul,ol{list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
h1,h2,h3,h4{font-family:var(--font-head);font-weight:900;letter-spacing:1px}
:focus-visible{outline:2px solid var(--orange);outline-offset:3px}
::selection{background:var(--orange);color:#fff}

.page-main{display:block;position:relative}
.container{max-width:var(--container);margin-inline:auto;padding-inline:var(--gutter)}
.tech-grid{
  background-image:
    linear-gradient(rgba(255,255,255,0.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,0.06) 1px,transparent 1px);
  background-size:32px 32px;
}
.tech-grid--light{
  background-image:
    linear-gradient(rgba(176,183,203,0.18) 1px,transparent 1px),
    linear-gradient(90deg,rgba(176,183,203,0.18) 1px,transparent 1px);
  background-size:32px 32px;
}
.index-tag{
  font-family:var(--font-index);
  font-size:11px;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--ink-soft);
  white-space:nowrap;
}
.coord-tag{
  display:inline-block;
  font-family:var(--font-index);
  font-size:11px;
  letter-spacing:0.1em;
  color:var(--metal);
  border:1px solid var(--line);
  padding:3px 10px;
  background:var(--glass);
}
.coord-tag--footer{
  color:rgba(255,255,255,0.55);
  border-color:rgba(255,255,255,0.14);
  background:transparent;
}

.skip-link{
  position:fixed;
  top:0;
  left:0;
  z-index:3000;
  transform:translateY(-120%);
  background:var(--ink);
  color:var(--bg);
  font-family:var(--font-index);
  font-size:13px;
  letter-spacing:0.08em;
  padding:12px 18px;
  transition:transform 0.2s var(--ease);
}
.skip-link:focus{transform:translateY(0);color:var(--bg)}

.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:3px;
  z-index:2000;
  pointer-events:none;
  background:rgba(43,38,32,0.1);
}
.scroll-progress::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,var(--orange) 0%,var(--lime) 100%);
  transform:scaleX(var(--progress,0));
  transform-origin:0 50%;
}

.site-header{
  position:sticky;
  top:0;
  z-index:1000;
  background:var(--glass);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:2px solid var(--ink);
  box-shadow:0 2px 0 rgba(43,38,32,0.06);
  transition:box-shadow 0.3s var(--ease);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-3px;
  height:3px;
  pointer-events:none;
  background:linear-gradient(90deg,var(--orange) 0 58%,var(--lime) 58% 78%,var(--ink) 78%);
}
.site-header.is-scrolled{
  box-shadow:0 8px 24px rgba(43,38,32,0.14);
}

.header-ribbon{
  border-bottom:1px solid rgba(43,38,32,0.12);
  background:rgba(245,242,233,0.72);
}
.ribbon-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:28px;
  padding-block:4px;
}
.ribbon-inner .index-tag:last-child{color:var(--metal)}
.live-clock{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-index);
  font-size:12px;
  letter-spacing:0.08em;
  color:var(--ink-soft);
}
.live-clock::before{
  content:"";
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--orange);
  box-shadow:0 0 0 0 rgba(224,92,58,0.5);
  animation:pulse-ring 2s infinite;
}
@keyframes pulse-ring{
  0%{box-shadow:0 0 0 0 rgba(224,92,58,0.5)}
  70%{box-shadow:0 0 0 7px rgba(224,92,58,0)}
  100%{box-shadow:0 0 0 0 rgba(224,92,58,0)}
}

.header-main{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 24px;
  padding-block:12px;
  position:relative;
}
.mobile-nav-toggle{
  display:inline-flex;
  width:44px;
  height:42px;
  margin-left:auto;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  border:1px solid var(--ink);
  background:var(--bg);
  transition:background 0.2s var(--ease), border-color 0.2s var(--ease);
}
.mobile-nav-toggle:hover{background:var(--ink)}
.mobile-nav-toggle:hover .nav-toggle-line{background:var(--bg)}
.nav-toggle-line{
  display:block;
  width:20px;
  height:2px;
  background:var(--ink);
  transition:transform 0.25s var(--ease), opacity 0.2s var(--ease), background 0.2s var(--ease);
}
.mobile-nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1){
  transform:translateY(7px) rotate(45deg);
}
.mobile-nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2){
  opacity:0;
}
.mobile-nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3){
  transform:translateY(-7px) rotate(-45deg);
}

.brand-lockup{
  display:inline-flex;
  align-items:center;
  gap:12px;
  min-width:0;
}
.brand-mark{
  display:grid;
  place-items:center;
  width:42px;
  height:42px;
  flex:0 0 auto;
  background:var(--ink);
  color:var(--bg);
  font-family:var(--font-head);
  font-size:20px;
  font-weight:900;
  clip-path:polygon(0 0,calc(100% - 8px) 0,100% 100%,8px 100%);
  transition:background 0.2s var(--ease), transform 0.2s var(--ease);
}
.brand-lockup:hover .brand-mark{background:var(--orange);transform:translateY(-1px)}
.brand-text{
  display:flex;
  flex-direction:column;
  line-height:1.2;
  min-width:0;
}
.brand-name{
  font-family:var(--font-head);
  font-size:22px;
  font-weight:900;
  letter-spacing:0.06em;
  color:var(--ink);
  white-space:nowrap;
}
.brand-sub{
  font-family:var(--font-index);
  font-size:10px;
  letter-spacing:0.14em;
  color:var(--metal);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}

.main-nav{
  flex-basis:100%;
  order:3;
}
.nav-list li+li{border-top:1px solid var(--line)}
.nav-link{
  display:block;
  position:relative;
  padding:13px 10px;
  font-family:var(--font-head);
  font-size:14px;
  font-weight:900;
  letter-spacing:0.1em;
  color:var(--ink);
  transition:color 0.2s var(--ease), background 0.2s var(--ease);
}
.nav-link::before{
  content:"";
  position:absolute;
  left:10px;
  right:10px;
  bottom:7px;
  height:3px;
  background:var(--orange);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform 0.3s var(--ease);
}
.nav-link:hover{color:var(--orange)}
.nav-link:hover::before,.nav-link[aria-current="page"]::before{transform:scaleX(1)}
.nav-link[aria-current="page"]{
  color:var(--bg);
  background:var(--ink);
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 100%,10px 100%);
}
.nav-meta{
  display:none;
  margin-left:10px;
  padding-left:14px;
  border-left:1px solid var(--line);
  color:var(--metal);
}

.section{
  position:relative;
  padding-block:clamp(48px,8vw,96px);
}
.section-head{
  display:flex;
  align-items:baseline;
  flex-wrap:wrap;
  gap:12px 18px;
  margin-bottom:30px;
}
.section-index{
  font-family:var(--font-index);
  font-size:13px;
  letter-spacing:0.16em;
  color:var(--orange);
}
.section-title{
  font-size:clamp(28px,4vw,44px);
  line-height:1.12;
  transform:skewX(-4deg);
}
.section-title .title-mark{
  display:inline-block;
  width:8px;
  height:8px;
  background:var(--lime);
  margin-right:10px;
  transform:skewX(8deg);
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:13px 24px;
  font-family:var(--font-head);
  font-size:14px;
  font-weight:900;
  letter-spacing:0.08em;
  color:#fff;
  background:var(--orange);
  border:1px solid var(--orange);
  clip-path:polygon(0 0,calc(100% - 12px) 0,100% 100%,12px 100%);
  transition:background 0.2s var(--ease),color 0.2s var(--ease),transform 0.2s var(--ease),box-shadow 0.2s var(--ease);
}
.btn:hover{
  background:var(--ink);
  border-color:var(--ink);
  color:var(--bg);
  transform:translateY(-2px);
  box-shadow:8px 8px 0 rgba(43,38,32,0.1);
}
.btn-ghost{
  background:transparent;
  color:var(--ink);
  border-color:var(--ink);
}
.btn-ghost:hover{
  background:var(--ink);
  color:var(--bg);
}
.btn-sm{padding:8px 16px;font-size:12px;clip-path:polygon(0 0,calc(100% - 8px) 0,100% 100%,8px 100%)}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 10px;
  padding:20px 0 8px;
  font-family:var(--font-index);
  font-size:12px;
  letter-spacing:0.06em;
  color:var(--ink-soft);
}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:var(--metal)}
.breadcrumb a{color:var(--ink)}
.breadcrumb a:hover{color:var(--orange)}

.media-frame{
  position:relative;
  overflow:hidden;
  background:var(--bg-alt);
  border:1px solid var(--ink);
}
.media-frame::after{
  content:attr(data-index);
  position:absolute;
  left:8px;
  bottom:8px;
  z-index:3;
  padding:3px 8px;
  font-family:var(--font-index);
  font-size:11px;
  letter-spacing:0.08em;
  color:#fff;
  background:var(--ink);
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:grayscale(18%) contrast(1.04);
  transition:transform 0.6s var(--ease),filter 0.6s var(--ease);
}
.media-frame:hover img{
  transform:scale(1.04);
  filter:grayscale(0) contrast(1.02);
}
.media-frame--wide{aspect-ratio:16/10}
.media-frame--portrait{aspect-ratio:4/5}
.media-frame--square{aspect-ratio:1/1}

.data-table{
  width:100%;
  border-collapse:collapse;
  background:var(--glass);
  border:1px solid var(--ink);
}
.data-table caption{
  font-family:var(--font-index);
  font-size:12px;
  text-align:left;
  padding:8px 12px;
  background:var(--ink);
  color:var(--bg);
}
.data-row{border-top:1px solid var(--line)}
.data-row:hover{background:var(--bg)}
.data-row:hover .data-cell:first-child{box-shadow:inset 4px 0 0 var(--orange)}
.data-cell{
  padding:12px 14px;
  font-family:var(--font-index);
  font-size:13px;
  letter-spacing:0.04em;
  color:var(--ink-soft);
}
.data-row .data-cell:first-child{
  color:var(--ink);
  font-weight:700;
}
.tile-card{
  position:relative;
  background:var(--glass);
  border:1px solid var(--ink);
  padding:22px;
  transition:transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s var(--ease);
}
.tile-card:hover{
  transform:translateY(-3px);
  box-shadow:10px 10px 0 rgba(43,38,32,0.12);
}
.tile-card .tile-index{
  font-family:var(--font-index);
  font-size:12px;
  color:var(--orange);
  letter-spacing:0.12em;
}
.tile-card .tile-title{
  font-family:var(--font-head);
  font-size:18px;
  font-weight:900;
  margin-top:8px;
  transform:skewX(-3deg);
}
.list-rule li{
  border-bottom:1px solid var(--line);
  padding:13px 0;
}
.list-rule li:last-child{border-bottom:0}
.list-rule a{
  font-family:var(--font-head);
  font-size:15px;
  font-weight:900;
  letter-spacing:0.04em;
  display:flex;
  align-items:center;
  gap:12px;
  transition:color 0.2s var(--ease);
}
.list-rule a:hover{color:var(--orange)}

.site-footer{
  position:relative;
  background-color:var(--bg-alt);
  color:rgba(255,255,255,0.82);
  border-top:3px solid var(--orange);
  overflow:hidden;
}
.site-footer a{
  color:rgba(255,255,255,0.82);
  transition:color 0.2s var(--ease);
  font-family:var(--font-head);
  font-size:14px;
  letter-spacing:0.04em;
}
.site-footer a:hover{color:var(--lime)}
.site-footer .index-tag{color:rgba(255,255,255,0.5)}
.footer-top{
  display:grid;
  grid-template-columns:1fr;
  gap:32px;
  padding-block:60px 40px;
}
.footer-brand{
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  gap:16px;
  max-width:420px;
}
.brand-lockup--footer .brand-mark{
  background:var(--orange);
  color:var(--bg);
}
.brand-lockup--footer .brand-name{color:#fff}
.brand-lockup--footer .brand-sub{color:rgba(255,255,255,0.55)}
.footer-trust{
  font-family:var(--font-body);
  font-size:14px;
  line-height:1.8;
  color:rgba(255,255,255,0.7);
  border-left:3px solid var(--lime);
  padding-left:14px;
}
.footer-heading{
  font-family:var(--font-index);
  font-size:12px;
  letter-spacing:0.16em;
  color:var(--orange-soft);
  padding-bottom:10px;
  margin-bottom:14px;
  border-bottom:1px solid rgba(255,255,255,0.14);
}
.footer-link-list li{
  margin-bottom:10px;
}
.footer-link-list a{
  display:inline-flex;
  align-items:center;
  gap:10px;
}
.footer-link-list a::before{
  content:"▸";
  color:var(--orange);
  font-family:var(--font-index);
  transition:transform 0.2s var(--ease);
}
.footer-link-list a:hover::before{transform:translateX(4px)}
.footer-contact-lines{
  font-family:var(--font-index);
  font-size:13px;
  line-height:2.1;
  color:rgba(255,255,255,0.75);
}
.footer-contact-lines a{font-family:var(--font-index);color:var(--lime)}
.footer-contact-lines a:hover{color:#fff}
.footer-note{
  margin-top:14px;
  display:block;
  color:rgba(255,255,255,0.4);
}
.footer-icp{
  margin-top:16px;
  display:inline-block;
  border:1px solid rgba(255,255,255,0.2);
  padding:4px 12px;
  color:rgba(255,255,255,0.55);
}
.footer-bottom{
  background:rgba(0,0,0,0.22);
  border-top:1px solid rgba(255,255,255,0.12);
  padding-block:18px;
}
.footer-bottom-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
}
.footer-copy{
  font-family:var(--font-index);
  font-size:13px;
  letter-spacing:0.04em;
  color:rgba(255,255,255,0.7);
}
.footer-system-label{
  color:rgba(255,255,255,0.4);
}

@media (max-width:899px){
  .main-nav{
    position:absolute;
    top:calc(100% + 2px);
    left:var(--gutter);
    right:var(--gutter);
    z-index:900;
    background:var(--bg);
    border:1px solid var(--ink);
    border-top:0;
    padding:8px 18px 16px;
    opacity:0;
    visibility:hidden;
    transform:translateY(-8px);
    transition:opacity 0.25s var(--ease),transform 0.25s var(--ease),visibility 0.25s;
    box-shadow:12px 12px 0 rgba(43,38,32,0.12);
  }
  .main-nav[data-open]{
    opacity:1;
    visibility:visible;
    transform:translateY(0);
  }
  .nav-meta{display:block;margin:14px 0 0;padding:12px 0 0;border-top:1px solid var(--line);border-left:0}
  .footer-top{gap:36px}
}

@media (min-width:600px){
  .footer-top{
    grid-template-columns:1fr 1fr;
  }
  .footer-brand{grid-column:1/-1}
}

@media (min-width:900px){
  .header-main{
    display:grid;
    grid-template-columns:auto 1fr;
    align-items:center;
    gap:28px;
  }
  .main-nav{
    flex-basis:auto;
    order:0;
    display:flex;
    justify-content:flex-end;
    align-items:center;
    gap:18px;
  }
  .nav-list{
    display:flex;
    align-items:center;
    gap:2px;
  }
  .nav-list li+li{border-top:0}
  .nav-link{
    padding:10px 14px;
    font-size:14px;
  }
  .nav-link[aria-current="page"]{
    clip-path:polygon(0 0,calc(100% - 8px) 0,100% 100%,8px 100%);
  }
  .nav-meta{
    display:inline;
  }
  .footer-top{
    grid-template-columns:1.2fr 0.8fr 1fr 0.8fr;
    gap:48px;
  }
  .footer-brand{grid-column:auto}
}

@media (min-width:1200px){
  .mobile-nav-toggle{display:none}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:0.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:0.01ms !important;
  }
  .live-clock::before{animation:none}
  .media-frame img,.tile-card,.btn{transition:none}
}