:root{
  --color-ink:#0B1B2C;
  --color-carbon:#0D0D0F;
  --color-neon:#39FF88;
  --color-orange:#FF6B35;
  --color-mist:#E8F0F4;
  --color-dim:#3A4A5A;
  --color-cyan:#00D4FF;
  --grad-neon:linear-gradient(135deg,#39FF88 0%,#00D4FF 100%);
  --font-display:"Oswald","Arial Narrow","DIN Condensed",sans-serif;
  --font-mono:"IBM Plex Mono","SFMono-Regular","Consolas","Liberation Mono",monospace;
  --text-main:1rem;
  --text-small:.8125rem;
  --text-xs:.75rem;
  --text-h1:clamp(2.8rem,7vw,5.5rem);
  --text-h2:clamp(2rem,4.5vw,3.5rem);
  --gap:1.5rem;
  --header-h:4.75rem;
  --maxw:1440px;
  --border-fine:1px solid rgba(232,240,244,.14);
  --shadow-card:0 20px 50px rgba(0,0,0,.35);
}

*,
*::before,
*::after{
  box-sizing:border-box;
  margin:0;
  padding:0;
}

html{
  scroll-behavior:smooth;
  scroll-padding-top:5.5rem;
}

body{
  background:var(--color-ink);
  color:var(--color-mist);
  font-family:var(--font-mono);
  font-size:var(--text-main);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

body::before{
  content:"";
  position:fixed;
  inset:0 0 auto 0;
  height:100vh;
  background:
    radial-gradient(ellipse 80% 50% at 80% -10%,rgba(0,212,255,.12) 0%,transparent 70%),
    radial-gradient(ellipse 60% 40% at 10% 0%,rgba(57,255,136,.07) 0%,transparent 70%),
    var(--color-ink);
  z-index:-2;
}

body::after{
  content:"";
  position:fixed;
  inset:0;
  background-image:
    linear-gradient(rgba(232,240,244,.025) 1px,transparent 1px),
    linear-gradient(90deg,rgba(232,240,244,.025) 1px,transparent 1px);
  background-size:60px 60px;
  mask-image:radial-gradient(ellipse 90% 70% at 50% 20%,#000 0%,transparent 80%);
  -webkit-mask-image:radial-gradient(ellipse 90% 70% at 50% 20%,#000 0%,transparent 80%);
  z-index:-1;
  pointer-events:none;
}

main{
  position:relative;
  min-height:70vh;
}

main:focus{
  outline:none;
}

img{
  max-width:100%;
  height:auto;
  display:block;
}

a{
  color:var(--color-mist);
  text-decoration:none;
  transition:color .25s ease,border-color .25s ease,background-color .25s ease;
}

a:hover{
  color:var(--color-neon);
}

button{
  font-family:inherit;
  font-size:inherit;
  background:none;
  border:none;
  color:inherit;
  cursor:pointer;
}

[aria-current="page"]{
  color:var(--color-neon) !important;
}

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

.visually-hidden{
  position:absolute !important;
  width:1px;
  height:1px;
  margin:-1px;
  padding:0;
  overflow:hidden;
  clip:rect(0,0,0,0);
  white-space:nowrap;
  border:0;
}

.skip-link{
  position:fixed;
  top:0;
  left:1rem;
  z-index:3000;
  background:var(--color-neon);
  color:var(--color-carbon);
  padding:.6rem 1rem;
  font-family:var(--font-display);
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:.08em;
  transform:translateY(-120%);
  transition:transform .25s ease;
}

.skip-link:focus{
  transform:translateY(0);
  outline:none;
}

/* ===== header ===== */
.site-header{
  position:sticky;
  top:0;
  z-index:1000;
  background:rgba(11,27,44,.92);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:var(--border-fine);
  box-shadow:0 10px 30px rgba(0,0,0,.25);
}

.site-header::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:2px;
  background:var(--grad-neon);
  transform-origin:left;
  animation:headerPulse 4s ease-in-out infinite alternate;
}

@keyframes headerPulse{
  0%{opacity:.55;transform:scaleX(.2)}
  50%{opacity:1;transform:scaleX(.75)}
  100%{opacity:.65;transform:scaleX(.4)}
}

.header-inner{
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 clamp(1rem,3vw,2.5rem);
  height:var(--header-h);
  display:flex;
  align-items:center;
  gap:1.5rem;
}

.header-brand{
  margin-right:auto;
  flex-shrink:0;
}

.brand-link{
  display:inline-flex;
  align-items:baseline;
  font-family:var(--font-display);
  font-size:1.4rem;
  font-weight:700;
  letter-spacing:.04em;
  text-transform:uppercase;
  color:var(--color-mist);
  line-height:1;
  gap:.15em;
}

.brand-mark{
  width:.55em;
  height:.55em;
  border-radius:50%;
  background:var(--color-neon);
  box-shadow:0 0 12px rgba(57,255,136,.8),0 0 30px rgba(57,255,136,.3);
  align-self:center;
  animation:brandBlink 2.4s ease-in-out infinite;
}

@keyframes brandBlink{
  0%,100%{opacity:1;box-shadow:0 0 12px rgba(57,255,136,.8)}
  50%{opacity:.5;box-shadow:0 0 4px rgba(57,255,136,.3)}
}

.brand-link:hover .brand-mark{
  animation-play-state:paused;
}

.brand-slash{
  color:var(--color-neon);
  font-weight:300;
  margin:0 .1em;
}

.header-search{
  display:none;
  align-items:center;
  gap:.3rem;
  padding:.35rem .6rem;
  border:1px solid rgba(232,240,244,.12);
  border-radius:4px;
  background:rgba(13,13,15,.4);
  transition:border-color .25s ease,box-shadow .25s ease;
}

.header-search:focus-within{
  border-color:rgba(57,255,136,.4);
  box-shadow:0 0 0 3px rgba(57,255,136,.1);
}

.search-label{
  display:flex;
  color:var(--color-dim);
}

.search-icon::before{
  content:"";
  display:block;
  width:.8rem;
  height:.8rem;
  border:1.5px solid var(--color-dim);
  border-radius:50%;
  position:relative;
}

.search-icon::after{
  content:"";
  display:block;
  width:5px;
  height:1.5px;
  background:var(--color-dim);
  position:relative;
  left:8px;
  top:-3px;
  transform:rotate(45deg);
}

.search-input{
  border:none;
  background:transparent;
  color:var(--color-mist);
  font-family:var(--font-mono);
  font-size:.75rem;
  width:9rem;
  padding:.1rem;
}

.search-input::placeholder{
  color:var(--color-dim);
}

.search-input:focus{
  outline:none;
}

.search-divider{
  width:1px;
  height:.9rem;
  background:rgba(232,240,244,.15);
}

.header-clock{
  display:none;
  align-items:center;
  gap:.5rem;
  border-left:1px solid rgba(232,240,244,.14);
  padding-left:1rem;
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.08em;
  color:var(--color-dim);
  flex-shrink:0;
}

.header-clock .clock-label{
  font-size:.6rem;
  text-transform:uppercase;
  letter-spacing:.14em;
  color:var(--color-dim);
  border:1px solid rgba(232,240,244,.12);
  padding:.1rem .4rem;
  border-radius:2px;
}

.header-clock .clock-time{
  color:var(--color-neon);
  font-weight:500;
}

.nav-toggle{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  color:var(--color-mist);
  font-family:var(--font-display);
  font-weight:600;
  text-transform:uppercase;
  letter-spacing:.08em;
  font-size:.85rem;
  padding:.4rem .5rem;
  border:1px solid rgba(232,240,244,.16);
  border-radius:4px;
  background:rgba(13,13,15,.4);
  line-height:1;
}

.nav-toggle:hover{
  border-color:var(--color-neon);
  color:var(--color-neon);
}

.nav-toggle-box{
  display:flex;
  flex-direction:column;
  gap:.3rem;
  width:1.1rem;
}

.nav-toggle-line{
  display:block;
  height:2px;
  width:100%;
  background:currentColor;
  border-radius:2px;
  transition:transform .3s ease,opacity .3s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1){
  transform:translateY(.32rem) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2){
  opacity:0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3){
  transform:translateY(-.32rem) rotate(-45deg);
}

.nav-toggle-text{
  display:none;
}

.site-nav{
  display:none;
  position:absolute;
  top:100%;
  left:0;
  right:0;
  background:rgba(11,27,44,.97);
  border-bottom:1px solid rgba(232,240,244,.16);
  padding:.75rem 1rem 1.25rem;
  flex-direction:column;
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
}

.site-nav[data-open]{
  display:flex;
}

.site-nav .nav-link{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  padding:.8rem 1rem;
  border-left:2px solid transparent;
  font-family:var(--font-display);
  font-size:1.1rem;
  font-weight:500;
  text-transform:uppercase;
  letter-spacing:.06em;
  color:var(--color-mist);
  border-bottom:1px solid rgba(232,240,244,.08);
}

.site-nav .nav-link::after{
  content:attr(data-index);
  font-family:var(--font-mono);
  font-size:.65rem;
  color:var(--color-dim);
}

.site-nav .nav-link:hover{
  border-left-color:var(--color-neon);
  color:var(--color-neon);
  padding-left:1.3rem;
  background:rgba(57,255,136,.04);
}

.site-nav .nav-link[aria-current="page"]{
  border-left-color:var(--color-neon);
  color:var(--color-neon);
}

.header-ticker-line{
  height:2px;
  background:rgba(232,240,244,.06);
  position:relative;
  overflow:hidden;
}

.ticker-line-fill{
  display:block;
  height:100%;
  width:30%;
  background:var(--grad-neon);
  animation:tickerMove 3.5s ease-in-out infinite alternate;
}

@keyframes tickerMove{
  0%{transform:translateX(-100%)}
  100%{transform:translateX(400%)}
}

/* ===== footer ===== */
.site-footer{
  background:var(--color-carbon);
  border-top:1px solid rgba(232,240,244,.1);
  margin-top:5rem;
  position:relative;
  z-index:1;
}

.site-footer::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--color-neon),transparent);
  opacity:.35;
}

.footer-ticker{
  overflow:hidden;
  background:rgba(11,27,44,.6);
  border-bottom:1px solid rgba(232,240,244,.08);
  padding:.7rem 0;
}

.footer-ticker-track{
  display:flex;
  align-items:center;
  gap:1.5rem;
  width:max-content;
  white-space:nowrap;
}

.ticker-item{
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.04em;
  color:var(--color-dim);
}

.ticker-sep{
  color:var(--color-neon);
  opacity:.7;
  font-size:.7rem;
}

.footer-inner{
  max-width:var(--maxw);
  margin:0 auto;
  padding:3.5rem clamp(1rem,3vw,2.5rem) 0;
}

.footer-grid{
  display:grid;
  grid-template-columns:1rem 1fr;
  gap:2.5rem 2rem;
}

.footer-col{
  min-width:0;
}

.footer-col-brand{
  grid-column:1 / -1;
}

.footer-brand-link{
  display:inline-flex;
  align-items:baseline;
  font-family:var(--font-display);
  font-size:1.6rem;
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:.06em;
  color:var(--color-mist);
  line-height:1.2;
  margin-bottom:.8rem;
}

.footer-brand-mark{
  width:.55em;
  height:.55em;
  border-radius:50%;
  background:var(--color-neon);
  box-shadow:0 0 14px rgba(57,255,136,.6);
  align-self:center;
  margin-right:.3em;
}

.footer-brand-sub{
  color:var(--color-dim);
  font-weight:400;
  font-size:.9rem;
  margin-left:.3em;
}

.footer-trust{
  color:var(--color-dim);
  font-size:.8125rem;
  line-height:1.8;
  max-width:32rem;
}

.footer-tags{
  display:flex;
  flex-wrap:wrap;
  gap:.4rem .5rem;
  margin-top:1rem;
}

.footer-tag{
  display:inline-block;
  border:1px solid rgba(57,255,136,.3);
  color:var(--color-neon);
  font-family:var(--font-display);
  font-size:.7rem;
  text-transform:uppercase;
  letter-spacing:.08em;
  padding:.2rem .6rem;
  border-radius:2px;
  background:rgba(57,255,136,.05);
}

.footer-col-title{
  font-family:var(--font-display);
  font-size:.9rem;
  font-weight:600;
  text-transform:uppercase;
  letter-spacing:.14em;
  color:var(--color-mist);
  margin-bottom:1rem;
  padding-bottom:.5rem;
  border-bottom:1px solid rgba(232,240,244,.12);
  position:relative;
}

.footer-col-title::after{
  content:"";
  position:absolute;
  bottom:-1px;
  left:0;
  width:2.2rem;
  height:1px;
  background:var(--color-neon);
}

.footer-links{
  list-style:none;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:.4rem .8rem;
}

.footer-links a{
  font-size:.8rem;
  color:var(--color-mist);
  padding:.2rem 0;
  position:relative;
  display:inline-block;
}

.footer-links a::before{
  content:">";
  color:var(--color-neon);
  font-family:var(--font-mono);
  font-size:.7rem;
  margin-right:.3rem;
  opacity:.7;
}

.footer-links a:hover{
  color:var(--color-neon);
  padding-left:.2rem;
}

.footer-contact{
  list-style:none;
  display:grid;
  gap:.5rem;
  font-size:.78rem;
}

.footer-contact li{
  display:flex;
  align-items:flex-start;
  gap:.5rem;
  color:var(--color-dim);
  line-height:1.6;
}

.footer-contact .contact-label{
  display:inline-block;
  min-width:2.4rem;
  font-family:var(--font-display);
  font-size:.7rem;
  text-transform:uppercase;
  letter-spacing:.08em;
  color:var(--color-neon);
  border:1px solid rgba(57,255,136,.25);
  padding:0 .3rem;
  border-radius:2px;
  text-align:center;
  margin-top:.1rem;
}

.footer-contact a{
  color:var(--color-mist);
  word-break:break-all;
}

.footer-contact a:hover{
  color:var(--color-neon);
}

.contact-address{
  display:inline-block;
  flex:1;
}

.footer-meta{
  display:flex;
  flex-wrap:wrap;
  gap:.5rem .75rem;
  border-top:1px solid rgba(232,240,244,.1);
  margin-top:2.5rem;
  padding:1.2rem 0;
  font-size:.65rem;
  letter-spacing:.04em;
  color:var(--color-dim);
  align-items:center;
}

.footer-meta a{
  color:var(--color-dim);
}

.footer-meta a:hover{
  color:var(--color-neon);
}

.footer-meta-sep{
  color:rgba(232,240,244,.2);
}

.footer-copyright{
  color:var(--color-mist);
  font-family:var(--font-display);
  letter-spacing:.06em;
}

.footer-icp{
  color:var(--color-dim);
}

.footer-note{
  width:100%;
  padding-top:.6rem;
  margin-top:.2rem;
  border-top:1px dotted rgba(232,240,244,.08);
  color:var(--color-dim);
  line-height:1.6;
}

.to-top{
  position:fixed;
  right:1.25rem;
  bottom:1.25rem;
  z-index:900;
  width:2.8rem;
  height:2.8rem;
  display:flex;
  align-items:center;
  justify-content:center;
  background:rgba(13,13,15,.85);
  border:1px solid rgba(57,255,136,.5);
  color:var(--color-neon);
  font-family:var(--font-display);
  font-size:.7rem;
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:.08em;
  transform:translateY(120%);
  transition:transform .35s ease,opacity .3s ease,background-color .3s ease;
  box-shadow:0 6px 20px rgba(0,0,0,.4);
}

.to-top[data-visible]{
  transform:translateY(0);
}

.to-top:hover{
  background:rgba(57,255,136,.15);
}

/* ===== 通用容器与基础组件 ===== */
.container{
  max-width:var(--maxw);
  margin:0 auto;
  padding:2rem clamp(1rem,3vw,2.5rem);
  width:100%;
}

.section{
  position:relative;
  padding:3.5rem 0;
}

.section::before{
  content:attr(data-section-name);
  position:absolute;
  top:1.5rem;
  right:clamp(1rem,3vw,2.5rem);
  font-family:var(--font-display);
  font-size:.7rem;
  letter-spacing:.2em;
  color:rgba(232,240,244,.2);
  text-transform:uppercase;
}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  gap:.4rem .8rem;
  font-size:.75rem;
  color:var(--color-dim);
  border-bottom:var(--border-fine);
  padding:1.5rem 0 1rem;
  margin-bottom:1.5rem;
  list-style:none;
}

.breadcrumb a{
  color:var(--color-dim);
}

.breadcrumb a:hover{
  color:var(--color-neon);
}

.breadcrumb li+li::before{
  content:"/";
  margin-right:.8rem;
  color:rgba(232,240,244,.2);
}

.breadcrumb li[aria-current="page"]{
  color:var(--color-mist);
}

.button{
  display:inline-block;
  padding:.7rem 1.4rem;
  background:var(--grad-neon);
  color:var(--color-carbon);
  font-family:var(--font-display);
  font-size:.8rem;
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:.1em;
  border-radius:3px;
  transition:transform .2s ease,box-shadow .2s ease;
  box-shadow:0 4px 20px rgba(57,255,136,.2);
}

.button:hover{
  color:var(--color-carbon);
  transform:translateY(-2px);
  box-shadow:0 10px 28px rgba(57,255,136,.3);
}

.button--ghost{
  background:transparent;
  color:var(--color-neon);
  border:1px solid rgba(57,255,136,.5);
  box-shadow:none;
}

.button--ghost:hover{
  background:rgba(57,255,136,.08);
  color:var(--color-neon);
}

.button--orange{
  background:var(--color-orange);
  box-shadow:0 4px 20px rgba(255,107,53,.25);
}

.button--orange:hover{
  box-shadow:0 10px 28px rgba(255,107,53,.35);
}

.section-title{
  font-family:var(--font-display);
  font-size:var(--text-h2);
  font-weight:600;
  text-transform:uppercase;
  line-height:1.1;
  letter-spacing:.02em;
  color:var(--color-mist);
  margin-bottom:1.5rem;
}

.section-title .title-num{
  color:var(--color-neon);
  font-size:.5em;
  vertical-align:super;
  margin-right:.3em;
}

.section-subtitle{
  color:var(--color-dim);
  font-size:.85rem;
  line-height:1.8;
  max-width:42rem;
}

/* ===== 数据卡片 / 刻度 / 标签 / 进度 ===== */
.data-card{
  background:rgba(13,13,15,.45);
  border:1px solid rgba(232,240,244,.1);
  border-radius:6px;
  padding:1.5rem;
  position:relative;
  transition:transform .3s ease,border-color .3s ease,background-color .3s ease;
}

.data-card:hover{
  transform:translateY(-4px);
  border-color:rgba(57,255,136,.35);
  background:rgba(13,13,15,.6);
}

.data-card::before{
  content:"";
  position:absolute;
  top:.6rem;
  right:.6rem;
  width:.4rem;
  height:.4rem;
  border-top:1px solid var(--color-dim);
  border-right:1px solid var(--color-dim);
}

.data-card::after{
  content:"";
  position:absolute;
  bottom:.6rem;
  left:.6rem;
  width:.4rem;
  height:.4rem;
  border-bottom:1px solid var(--color-dim);
  border-left:1px solid var(--color-dim);
}

.data-card[data-accent="neon"]{
  border-left:3px solid var(--color-neon);
}

.data-card[data-accent="orange"]{
  border-left:3px solid var(--color-orange);
}

.data-card[data-accent="cyan"]{
  border-left:3px solid var(--color-cyan);
}

.data-card .card-label{
  font-family:var(--font-display);
  font-size:.65rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--color-dim);
  margin-bottom:.8rem;
  display:block;
}

.data-card .card-value{
  font-family:var(--font-display);
  font-size:2rem;
  font-weight:600;
  color:var(--color-mist);
  line-height:1;
}

.data-card .card-value em{
  font-style:normal;
  color:var(--color-neon);
}

.data-card .card-note{
  font-size:.7rem;
  color:var(--color-dim);
  margin-top:.6rem;
}

.pulse-dot{
  display:inline-block;
  width:.4rem;
  height:.4rem;
  border-radius:50%;
  background:var(--color-neon);
  animation:pulseDot 1.4s ease-in-out infinite;
}

@keyframes pulseDot{
  0%,100%{box-shadow:0 0 0 0 rgba(57,255,136,.7)}
  50%{box-shadow:0 0 0 6px rgba(57,255,136,0)}
}

.rule-line{
  height:1px;
  background:linear-gradient(90deg,var(--color-neon) 0%,transparent 80%);
  opacity:.4;
  margin:2rem 0;
}

.grid{
  display:grid;
  gap:var(--gap);
}

.grid--2{
  grid-template-columns:repeat(2,1fr);
}

.grid--3{
  grid-template-columns:repeat(3,1fr);
}

.grid--4{
  grid-template-columns:repeat(4,1fr);
}

.grid--1-2{
  grid-template-columns:1fr 2fr;
}

.grid--2-1{
  grid-template-columns:2fr 1fr;
}

.grid--1-3{
  grid-template-columns:1fr 3fr;
}

.grid--12{
  grid-template-columns:repeat(12,1fr);
}

.col-span-3{grid-column:span 3}
.col-span-4{grid-column:span 4}
.col-span-5{grid-column:span 5}
.col-span-6{grid-column:span 6}
.col-span-7{grid-column:span 7}
.col-span-8{grid-column:span 8}
.col-span-9{grid-column:span 9}
.col-span-12{grid-column:span 12}

/* 图片容器基础规则 */
.image-frame{
  position:relative;
  background:rgba(13,13,15,.6);
  border:1px solid rgba(232,240,244,.14);
  border-radius:4px;
  overflow:hidden;
  min-height:12rem;
}

.image-frame::before{
  content:attr(data-image-label);
  position:absolute;
  top:1rem;
  left:1rem;
  font-family:var(--font-display);
  font-size:.7rem;
  letter-spacing:.16em;
  color:var(--color-dim);
  text-transform:uppercase;
  z-index:2;
}

.image-frame::after{
  content:"";
  position:absolute;
  inset:0;
  background:
    linear-gradient(135deg,rgba(0,212,255,.08) 0%,transparent 60%),
    repeating-linear-gradient(0deg,transparent 0 14px,rgba(232,240,244,.03) 14px 15px),
    repeating-linear-gradient(90deg,transparent 0 14px,rgba(232,240,244,.03) 14px 15px);
  pointer-events:none;
}

.image-frame[data-image-ratio="wide"]{
  aspect-ratio:16/7;
}

.image-frame[data-image-ratio="landscape"]{
  aspect-ratio:16/10;
}

.image-frame[data-image-ratio="square"]{
  aspect-ratio:1/1;
}

.image-frame[data-image-ratio="tall"]{
  aspect-ratio:3/4;
  min-height:20rem;
}

/* ===== 标签页 / 分段切换 ===== */
.tabs{
  display:flex;
  gap:.3rem;
  border-bottom:1px solid rgba(232,240,244,.15);
  overflow-x:auto;
  scrollbar-width:none;
  padding-bottom:0;
}

.tabs::-webkit-scrollbar{
  display:none;
}

.tab-btn{
  font-family:var(--font-display);
  font-size:.85rem;
  font-weight:600;
  text-transform:uppercase;
  letter-spacing:.08em;
  color:var(--color-dim);
  padding:.7rem 1.2rem .6rem;
  border:1px solid transparent;
  border-bottom:none;
  border-radius:4px 4px 0 0;
  position:relative;
  white-space:nowrap;
  transition:color .2s ease,background-color .2s ease;
}

.tab-btn:hover{
  color:var(--color-mist);
}

.tab-btn[aria-selected="true"]{
  color:var(--color-neon);
  background:rgba(57,255,136,.05);
  border-color:rgba(232,240,244,.12);
}

.tab-btn[aria-selected="true"]::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  background:var(--grad-neon);
}

.tab-panel{
  padding:1.5rem 0;
}

.tab-panel[hidden]{
  display:none;
}

/* ===== 进度条 ===== */
.progress-track{
  height:3px;
  background:rgba(232,240,244,.1);
  border-radius:2px;
  overflow:hidden;
}

.progress-fill{
  height:100%;
  background:var(--grad-neon);
  border-radius:2px;
  transform-origin:left;
  transition:transform .4s ease;
}

/* ===== 刻度装饰 ===== */
.scale-marks{
  display:flex;
  gap:0;
  height:1.5rem;
  align-items:flex-end;
  overflow:hidden;
}

.scale-marks span{
  flex:1;
  border-left:1px solid rgba(232,240,244,.2);
  height:40%;
}

.scale-marks span:nth-child(4n){
  height:70%;
  border-left-color:rgba(232,240,244,.3);
}

.scale-marks span:nth-child(10n){
  height:100%;
  border-left-color:rgba(57,255,136,.6);
}

/* ===== 返回顶部 / 标签徽章 ===== */
.tag-badge{
  display:inline-block;
  font-family:var(--font-display);
  font-size:.7rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--color-neon);
  border:1px solid rgba(57,255,136,.4);
  border-radius:2px;
  padding:.2rem .6rem;
}

.tag-badge--orange{
  color:var(--color-orange);
  border-color:rgba(255,107,53,.4);
}

/* ===== 响应式 ===== */
@media (min-width:640px){
  .nav-toggle-text{
    display:inline;
  }
}

@media (min-width:900px){
  :root{
    --header-h:5.25rem;
  }

  .header-search{
    display:flex;
  }

  .header-clock{
    display:flex;
  }

  .nav-toggle{
    display:none;
  }

  .site-nav{
    display:flex;
    position:static;
    flex-direction:row;
    background:transparent;
    border:none;
    padding:0;
    gap:.1rem;
    margin-left:auto;
    backdrop-filter:none;
    -webkit-backdrop-filter:none;
  }

  .site-nav .nav-link{
    padding:.5rem .8rem;
    border-left:none;
    border-bottom:none;
    font-size:.9rem;
    font-weight:500;
    letter-spacing:.04em;
    text-transform:uppercase;
    position:relative;
  }

  .site-nav .nav-link::before{
    content:"0" attr(data-index);
    font-family:var(--font-mono);
    font-size:.55rem;
    color:var(--color-neon);
    display:block;
    opacity:.7;
    margin-bottom:.1rem;
  }

  .site-nav .nav-link::after{
    content:"";
    position:absolute;
    bottom:.2rem;
    left:.8rem;
    right:.8rem;
    bottom:.15rem;
    height:1px;
    background:var(--color-neon);
    transform:scaleX(0);
    transform-origin:left;
    transition:transform .25s ease;
  }

  .site-nav .nav-link[aria-current="page"]::after{
    content:"";
    transform:scaleX(1);
  }

  .site-nav .nav-link:hover{
    border-left-color:transparent;
    padding-left:.8rem;
    background:transparent;
  }

  .site-nav .nav-link:hover::after{
    content:"";
    transform:scaleX(1);
  }

  .footer-grid{
    grid-template-columns:1.1fr .9fr 1fr;
    gap:2rem 3rem;
  }

  .footer-col-brand{
    grid-column:auto;
  }
}

@media (min-width:1200px){
  .site-nav .nav-link{
    font-size:1rem;
    padding:.5rem 1.1rem;
  }

  .site-nav .nav-link:hover,
  .site-nav .nav-link[aria-current="page"]{
    padding-left:1.1rem;
  }
}

@media (prefers-reduced-motion:reduce){
  *,
  *::before,
  *::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }

  .site-header::before,
  .brand-mark,
  .ticker-line-fill,
  .pulse-dot{
    animation:none !important;
  }
}