*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body,p,h1,h2,h3,h4,ul,ol,dl,dd,figure{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit}

:root{
  --ink:#020A08;
  --pitch:#061B16;
  --pitch-2:#0B2E25;
  --pitch-3:#123B30;
  --cyan:#2FF3D0;
  --blue:#4DA3FF;
  --orange:#FF5A3C;
  --warn:#FFD166;
  --white:#F4F8F6;
  --mist:#A9BDB6;
  --paper:#DDE7E2;

  --line:rgba(221,231,226,.16);
  --line-strong:rgba(221,231,226,.34);

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

  --wrap:1280px;
  --gutter:clamp(16px,3.2vw,44px);
  --r:2px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:220ms;
}

body{
  background:var(--pitch);
  color:var(--white);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background:
    radial-gradient(120% 80% at 50% -12%,rgba(47,243,208,.09),transparent 58%),
    radial-gradient(90% 60% at 110% 20%,rgba(77,163,255,.07),transparent 60%),
    repeating-linear-gradient(0deg,rgba(221,231,226,.026) 0 1px,transparent 1px 96px);
}

a{color:var(--cyan);text-decoration:none}
a:hover{color:var(--white)}
strong,b{font-weight:700;color:var(--white)}
em{font-style:normal;color:var(--cyan)}
code,kbd,samp{font-family:var(--font-mono);font-size:.92em;color:var(--blue)}

:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
#main-content{display:block;scroll-margin-top:120px}
#main-content:focus{outline:none}

/* ---------- 容器与基础排版 ---------- */
.wrap{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.kicker{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.2em;
  color:var(--cyan);
}
.kicker::before{
  content:"";
  width:24px;
  height:1px;
  background:currentColor;
  opacity:.75;
}

.section-title{
  font-family:var(--font-display);
  font-size:clamp(24px,3.4vw,40px);
  font-weight:800;
  line-height:1.08;
  letter-spacing:.01em;
  color:var(--white);
}

.rule{
  height:1px;
  border:0;
  margin:clamp(20px,3vw,36px) 0;
  background:var(--line);
}

.prose{
  max-width:70ch;
  font-size:16px;
  line-height:1.8;
  color:var(--paper);
}
.prose > * + *{margin-top:1.1em}
.prose h2,.prose h3{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.16;
  color:var(--white);
}
.prose h2{font-size:clamp(22px,2.6vw,30px);margin-top:1.8em}
.prose h3{font-size:clamp(18px,2vw,22px);margin-top:1.5em}
.prose ul{list-style:none;padding-left:0}
.prose ul li{position:relative;padding-left:20px}
.prose ul li::before{
  content:"";
  position:absolute;
  left:2px;top:.78em;
  width:8px;height:1px;
  background:var(--cyan);
}

.note{
  max-width:32ch;
  padding-left:14px;
  border-left:1px solid var(--line-strong);
  font-size:13px;
  line-height:1.72;
  color:var(--mist);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 9px;
  border:1px solid var(--line-strong);
  border-radius:var(--r);
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:500;
  letter-spacing:.14em;
  line-height:1.4;
  color:var(--paper);
  background:transparent;
}
.tag--cyan{color:var(--cyan);border-color:rgba(47,243,208,.44);background:rgba(47,243,208,.09)}
.tag--blue{color:var(--blue);border-color:rgba(77,163,255,.44);background:rgba(77,163,255,.09)}
.tag--orange{color:var(--orange);border-color:rgba(255,90,60,.46);background:rgba(255,90,60,.11)}
.tag--warn{color:var(--warn);border-color:rgba(255,209,102,.46);background:rgba(255,209,102,.1)}

/* ---------- 跳过链接 ---------- */
.skip-link{
  position:absolute;
  left:12px;
  top:-64px;
  z-index:200;
  padding:10px 16px;
  background:var(--cyan);
  color:var(--ink);
  font-family:var(--font-display);
  font-size:13px;
  font-weight:700;
  letter-spacing:.14em;
  border-radius:var(--r);
  transition:top var(--dur) var(--ease);
}
.skip-link:focus{top:12px;color:var(--ink)}

/* ---------- 公告窄条 ---------- */
.notice-bar{
  position:relative;
  z-index:70;
  background:var(--ink);
  border-bottom:1px solid rgba(255,90,60,.32);
}
.notice-bar__inner{
  display:flex;
  align-items:center;
  gap:12px;
  min-height:38px;
  padding-block:7px;
}
.notice-bar__dot{
  flex:0 0 auto;
  width:7px;height:7px;
  border-radius:50%;
  background:var(--orange);
  box-shadow:0 0 0 3px rgba(255,90,60,.18);
}
.notice-bar__text{
  flex:1 1 auto;
  min-width:0;
  font-size:12px;
  line-height:1.5;
  letter-spacing:.06em;
  color:var(--paper);
}
.notice-bar__link{
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--orange);
  border-bottom:1px solid rgba(255,90,60,.5);
  padding-bottom:1px;
}
.notice-bar__link:hover{color:var(--white);border-bottom-color:var(--white)}

/* ---------- 站点头部 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(6,27,22,.94);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line-strong);
  transition:box-shadow var(--dur) var(--ease);
}
.site-header[data-compact]{
  box-shadow:0 18px 40px -28px rgba(2,10,8,.95);
}
.site-header[data-compact] .masthead{padding-block:6px 5px}

.masthead{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);
  align-items:center;
  gap:clamp(10px,2vw,28px);
  padding-block:clamp(12px,1.8vw,20px) clamp(10px,1.5vw,16px);
  transition:padding var(--dur) var(--ease);
}
.masthead::after{
  content:"";
  position:absolute;
  inset:auto 0 -1px 0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,243,208,.5),transparent);
}

.masthead__issue{
  justify-self:start;
  display:flex;
  flex-direction:column;
  gap:3px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.2em;
  line-height:1.4;
}
.masthead__issue-num{color:var(--cyan);font-weight:500}
.masthead__issue-text{color:var(--mist)}

.brand{
  justify-self:center;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:5px;
  text-align:center;
  color:var(--white);
  transition:color var(--dur) var(--ease);
}
.brand:hover{color:var(--white)}
.brand__cn{
  font-family:var(--font-display);
  font-size:clamp(22px,3.1vw,38px);
  font-weight:800;
  line-height:1;
  letter-spacing:.09em;
  text-transform:uppercase;
}
.brand__en{
  font-family:var(--font-mono);
  font-size:clamp(8px,.85vw,10px);
  font-weight:500;
  letter-spacing:.42em;
  color:var(--cyan);
}

.masthead__actions{
  justify-self:end;
  display:flex;
  align-items:center;
  gap:8px;
}

/* ---------- 移动端栏目按钮 ---------- */
.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  padding:9px 11px;
  background:transparent;
  border:1px solid var(--line-strong);
  border-radius:var(--r);
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  cursor:pointer;
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle__bars{
  display:grid;
  gap:3px;
  width:16px;
}
.nav-toggle__bars i{
  display:block;
  height:1.5px;
  width:100%;
  background:currentColor;
  transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1){transform:translateY(4.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3){transform:translateY(-4.5px) rotate(-45deg)}
.nav-toggle__text{white-space:nowrap}

/* ---------- 栏目索引条 ---------- */
.primary-nav{
  position:relative;
  border-top:1px solid var(--line);
}
.primary-nav__list{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
}
.primary-nav__item{position:relative}
.primary-nav__item + .primary-nav__item::before{
  content:"";
  position:absolute;
  left:0;
  top:50%;
  transform:translateY(-50%);
  width:1px;
  height:11px;
  background:var(--line);
}
.primary-nav__link{
  position:relative;
  display:flex;
  align-items:baseline;
  gap:.55em;
  padding:13px clamp(9px,1.3vw,20px);
  font-family:var(--font-display);
  font-size:13px;
  font-weight:600;
  letter-spacing:.11em;
  color:var(--paper);
  transition:color var(--dur) var(--ease);
}
.primary-nav__link::after{
  content:"";
  position:absolute;
  left:50%;
  right:50%;
  bottom:0;
  height:2px;
  background:var(--cyan);
  transition:left var(--dur) var(--ease),right var(--dur) var(--ease);
}
.primary-nav__link:hover{color:var(--cyan)}
.primary-nav__link:hover::after{left:0;right:0}
.primary-nav__num{
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:400;
  letter-spacing:.08em;
  color:var(--mist);
  transition:color var(--dur) var(--ease);
}
.primary-nav__link:hover .primary-nav__num{color:var(--cyan)}
.primary-nav__link[aria-current="page"]{color:var(--cyan)}
.primary-nav__link[aria-current="page"] .primary-nav__num{color:var(--cyan)}
.primary-nav__link[aria-current="page"]::after{left:0;right:0}

/* ---------- 阅读进度灯带 ---------- */
.scroll-meter{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  overflow:hidden;
  background:rgba(221,231,226,.07);
  pointer-events:none;
}
.scroll-meter__fill{
  display:block;
  height:100%;
  width:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan) 0%,var(--blue) 62%,var(--orange) 100%);
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5em;
  padding:10px 15px;
  border:1px solid var(--line-strong);
  border-radius:var(--r);
  background:transparent;
  color:var(--paper);
  font-family:var(--font-display);
  font-size:12px;
  font-weight:700;
  letter-spacing:.14em;
  line-height:1.2;
  text-decoration:none;
  cursor:pointer;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn--primary{
  background:var(--cyan);
  border-color:var(--cyan);
  color:var(--ink);
}
.btn--primary:hover{background:#7CFFE7;border-color:#7CFFE7;color:var(--ink)}
.btn--ghost{background:transparent;color:var(--paper)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn--quiet{
  border-color:transparent;
  color:var(--mist);
  padding-inline:6px;
}
.btn--quiet:hover{color:var(--cyan);border-color:transparent}
.btn--block{display:flex;width:100%}
.btn:active{transform:translateY(1px)}

/* ---------- 面包屑 ---------- */
.breadcrumbs{
  padding-block:12px;
  border-bottom:1px solid var(--line);
}
.breadcrumbs__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:7px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--mist);
}
.breadcrumbs__list a{color:var(--mist)}
.breadcrumbs__list a:hover{color:var(--cyan)}
.breadcrumbs__sep{color:var(--line-strong)}
.breadcrumbs__list [aria-current="page"]{color:var(--paper)}

/* ---------- 内页标题区 ---------- */
.page-head{
  padding-block:clamp(26px,4.6vw,60px) clamp(18px,3vw,34px);
  border-bottom:1px solid var(--line);
}
.page-head__title{
  font-family:var(--font-display);
  font-size:clamp(32px,5.6vw,68px);
  font-weight:800;
  line-height:1.03;
  letter-spacing:.01em;
  margin-bottom:clamp(10px,1.4vw,16px);
}
.page-head__lead{
  max-width:62ch;
  font-size:clamp(15px,1.35vw,17px);
  line-height:1.75;
  color:var(--mist);
}

/* ---------- 栅格 ---------- */
.grid{
  display:grid;
  gap:clamp(16px,2vw,28px);
}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--sidebar{grid-template-columns:minmax(0,1fr) minmax(220px,300px)}

/* ---------- 纸卡 ---------- */
.panel{
  position:relative;
  padding:clamp(16px,2vw,26px);
  background:var(--pitch-2);
  border:1px solid var(--line);
  border-radius:var(--r);
}
.panel--edge::before{
  content:"";
  position:absolute;
  left:0;
  top:0;
  bottom:0;
  width:3px;
  background:var(--cyan);
}
.panel__title{
  font-family:var(--font-display);
  font-size:clamp(17px,1.8vw,21px);
  font-weight:700;
  letter-spacing:.02em;
  line-height:1.25;
  margin-bottom:.5em;
}

/* ---------- 图片容器 ---------- */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16/9;
  border:1px solid var(--line);
  border-radius:var(--r);
  background-color:var(--pitch-2);
  background-image:
    radial-gradient(120% 120% at 18% 0%,rgba(47,243,208,.16),transparent 58%),
    radial-gradient(90% 90% at 92% 100%,rgba(255,90,60,.13),transparent 62%),
    repeating-linear-gradient(90deg,rgba(77,163,255,.16) 0 1px,transparent 1px 46px),
    repeating-linear-gradient(0deg,rgba(77,163,255,.16) 0 1px,transparent 1px 46px);
}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:4/5}
.media--square{aspect-ratio:1/1}
.media > img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.92) contrast(1.06);
}
.media__tag{
  position:absolute;
  left:12px;
  top:12px;
  z-index:2;
  padding:4px 8px;
  border:1px solid rgba(47,243,208,.42);
  background:rgba(2,10,8,.74);
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.14em;
  line-height:1.4;
}
.media__caption{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  z-index:2;
  padding:32px 14px 12px;
  font-size:12px;
  line-height:1.6;
  color:var(--paper);
  background:linear-gradient(180deg,transparent,rgba(2,10,8,.88));
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,110px);
  padding-block:clamp(34px,5vw,60px) 22px;
  background:var(--ink);
  border-top:1px solid var(--line-strong);
  color:var(--paper);
}
.site-footer::before{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:0;
  height:3px;
  background:linear-gradient(90deg,var(--cyan) 0%,var(--blue) 46%,var(--orange) 100%);
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(230px,1.7fr) repeat(3,minmax(110px,.75fr)) minmax(200px,1.15fr);
  gap:clamp(20px,2.6vw,40px);
}
.footer-brand__cn{
  font-family:var(--font-display);
  font-size:clamp(20px,2.4vw,26px);
  font-weight:800;
  line-height:1.1;
  letter-spacing:.09em;
  color:var(--white);
}
.footer-brand__en{
  margin-top:6px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.4em;
  color:var(--cyan);
}
.footer-brand__note{
  margin-top:14px;
  max-width:34ch;
  font-size:13px;
  line-height:1.72;
  color:var(--mist);
}
.footer-brand__flag{
  margin-top:14px;
  padding-top:12px;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.18em;
  color:var(--paper);
}
.footer-col__title{
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:500;
  letter-spacing:.24em;
  color:var(--cyan);
}
.footer-col__list{
  display:grid;
  gap:9px;
}
.footer-col__list a{
  display:inline-block;
  font-size:14px;
  line-height:1.55;
  color:var(--paper);
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-col__list a:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.footer-contact__list{
  display:grid;
  gap:10px;
}
.footer-contact__row{
  display:grid;
  gap:2px;
}
.footer-contact__row dt{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  color:var(--mist);
}
.footer-contact__row dd{
  font-size:13px;
  line-height:1.6;
  color:var(--white);
  word-break:break-word;
}
.footer-contact__note{
  margin-top:14px;
  padding-top:12px;
  border-top:1px solid var(--line);
  font-size:12px;
  line-height:1.7;
  color:var(--mist);
}
.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  margin-top:clamp(26px,3.4vw,44px);
  padding-top:16px;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--mist);
}
.footer-base__icp{color:var(--paper)}

/* ---------- 响应式 ---------- */
@media (max-width:1100px){
  .footer-grid{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
  .footer-brand{grid-column:1/-1}
}

@media (max-width:960px){
  .masthead{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    padding-block:11px 9px;
  }
  .masthead::after{display:none}
  .masthead__issue{display:none}
  .brand{
    justify-self:start;
    align-items:flex-start;
    text-align:left;
    gap:3px;
  }
  .brand__cn{font-size:clamp(19px,5vw,26px);letter-spacing:.06em}
  .brand__en{font-size:8px;letter-spacing:.3em}
  .masthead__actions{justify-self:auto;gap:6px}
  .masthead__actions .btn--ghost{display:none}
  .masthead__actions .btn{padding:9px 12px;font-size:11px;letter-spacing:.1em}
  .nav-toggle{display:inline-flex}

  .primary-nav{
    display:none;
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line-strong);
    background:rgba(2,10,8,.5);
  }
  .primary-nav[data-open="true"]{display:block}
  .primary-nav__list{flex-direction:column}
  .primary-nav__item + .primary-nav__item::before{display:none}
  .primary-nav__item + .primary-nav__item{border-top:1px solid var(--line)}
  .primary-nav__link{
    justify-content:flex-start;
    padding:14px 4px;
    font-size:15px;
    letter-spacing:.08em;
  }
  .primary-nav__link::after{display:none}
  .primary-nav__link[aria-current="page"]{
    color:var(--cyan);
    box-shadow:inset 3px 0 0 var(--cyan);
    padding-left:12px;
  }
  .notice-bar__text{font-size:11px}
}

@media (max-width:880px){
  .grid--2,.grid--3,.grid--sidebar{grid-template-columns:minmax(0,1fr)}
  .note{max-width:none}
}

@media (max-width:640px){
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-base{flex-direction:column;align-items:flex-start}
  .notice-bar__inner{gap:9px}
  .notice-bar__link{font-size:10px}
  .breadcrumbs__list{font-size:10px;letter-spacing:.06em}
}

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion:no-preference){
  html{scroll-behavior:smooth}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .scroll-meter__fill{transition:none !important}
}

@media print{
  body{background:#fff;color:#000}
  body::before,.site-header,.notice-bar,.site-footer,.scroll-meter,.skip-link{display:none !important}
}