:root{
  --ink:#070B09;
  --deep:#0D211C;
  --board:#143128;
  --line:#24382F;
  --lime:#C6FF4F;
  --amber:#FF9B31;
  --cyan:#3FE0C0;
  --porcelain:#F3F6F1;
  --mist:#98A79E;
  --amber-deep:#7A4A12;

  --font-display:"PingFang SC","Source Han Sans SC","Noto Sans SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-editorial:"Songti SC","Source Han Serif SC","Noto Serif SC","SimSun",Georgia,"Times New Roman",serif;
  --font-mono:ui-monospace,"JetBrains Mono","IBM Plex Mono","SFMono-Regular",Menlo,Consolas,"Courier New",monospace;
  --font-body:var(--font-display);

  --shell:1240px;
  --gutter:clamp(18px,4vw,56px);
  --header-h:68px;
  --r-lg:28px;
  --r-md:18px;
  --r-pill:999px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
@media (min-width:941px){
  :root{ --header-h:76px; }
}

*,*::before,*::after{ box-sizing:border-box; }
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-h) + 16px);
}
body{
  margin:0;
  padding-top:var(--header-h);
  background:var(--ink);
  color:var(--porcelain);
  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;
}
img,svg,video{ max-width:100%; }
img{ height:auto; border-style:none; }
h1,h2,h3,h4,h5,h6{ margin:0; font-weight:700; line-height:1.25; }
p{ margin:0 0 1em; }
ul,ol{ margin:0; padding:0; }
button{ font:inherit; color:inherit; }
table{ border-collapse:collapse; }
::selection{ background:rgba(198,255,79,.3); color:var(--porcelain); }

:focus-visible{
  outline:2px solid var(--lime);
  outline-offset:3px;
  border-radius:3px;
}
a:focus-visible,button:focus-visible,[tabindex]:focus-visible{
  outline:2px solid var(--lime);
  outline-offset:3px;
}

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

/* ---------- 布局容器 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.grid{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2.2vw,32px);
}
.col-main{ grid-column:1 / span 7; min-width:0; }
.col-side{ grid-column:8 / span 3; min-width:0; }
.col-rail{ grid-column:11 / span 2; min-width:0; }
.col-full{ grid-column:1 / -1; min-width:0; }

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;
  left:clamp(12px,3vw,32px);
  top:-120px;
  z-index:140;
  padding:12px 22px;
  border-radius:0 0 var(--r-pill) var(--r-pill);
  background:var(--lime);
  color:var(--ink);
  font-size:14px;
  font-weight:600;
  text-decoration:none;
  transition:top .22s var(--ease);
}
.skip-link:focus{ top:0; }

/* ---------- 页头 ---------- */
.site-header{
  position:fixed;
  inset:0 0 auto 0;
  z-index:90;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .35s var(--ease),border-color .35s var(--ease),backdrop-filter .35s var(--ease);
}
.site-header[data-stuck="true"]{
  background:rgba(7,11,9,.88);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom-color:var(--line);
}
.site-header__inner{
  display:flex;
  align-items:center;
  gap:clamp(14px,2.4vw,36px);
  min-height:var(--header-h);
}
.scroll-progress{
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:2px;
  background:linear-gradient(90deg,var(--lime),var(--cyan));
  transform:scaleX(0);
  transform-origin:0 50%;
  opacity:0;
  transition:opacity .3s var(--ease);
  will-change:transform;
}
.site-header[data-stuck="true"] .scroll-progress{ opacity:1; }

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  color:var(--porcelain);
  text-decoration:none;
  flex:0 0 auto;
}
.brand__mark{
  position:relative;
  display:block;
  width:14px;
  height:30px;
  flex:0 0 auto;
}
.brand__mark::before{
  content:"";
  position:absolute;
  left:6px;top:1px;bottom:1px;
  width:2px;
  border-radius:2px;
  background:linear-gradient(180deg,var(--lime),var(--cyan) 48%,var(--amber));
  opacity:.85;
}
.brand__mark i{
  position:absolute;
  left:3px;
  width:8px;height:8px;
  border-radius:50%;
  background:var(--ink);
  border:2px solid var(--lime);
}
.brand__mark i:nth-child(1){ top:0; }
.brand__mark i:nth-child(2){ top:11px; border-color:var(--porcelain); }
.brand__mark i:nth-child(3){ top:22px; border-color:var(--amber); }
.brand__text{
  display:flex;
  flex-direction:column;
  gap:5px;
  line-height:1;
}
.brand__word{
  font-family:var(--font-display);
  font-weight:900;
  font-size:20px;
  letter-spacing:.07em;
  font-stretch:condensed;
}
.brand__sub{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  color:var(--mist);
  text-transform:uppercase;
}

/* 移动目录按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  margin-left:auto;
  padding:9px 16px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:rgba(20,49,40,.55);
  color:var(--porcelain);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  cursor:pointer;
  transition:border-color .22s var(--ease),background-color .22s var(--ease);
}
.nav-toggle:hover{ border-color:#3A5B4E; background:rgba(20,49,40,.9); }
.nav-toggle__bars{
  position:relative;
  display:block;
  width:16px;
  height:10px;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;height:1.5px;
  border-radius:2px;
  background:currentColor;
  transition:transform .26s var(--ease),top .26s var(--ease);
}
.nav-toggle__bars::before{ top:1px; }
.nav-toggle__bars::after{ top:8px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{ top:5px; transform:rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{ top:5px; transform:rotate(-45deg); }

/* 主导航 */
.nav-primary{
  display:flex;
  align-items:center;
  gap:clamp(16px,2.2vw,34px);
  margin-left:auto;
}
.nav-primary__list{
  display:flex;
  align-items:center;
  gap:clamp(12px,1.7vw,26px);
  list-style:none;
}
.nav-primary__link{
  position:relative;
  display:inline-block;
  padding:9px 2px;
  color:var(--mist);
  font-size:15px;
  letter-spacing:.02em;
  text-decoration:none;
  transition:color .25s var(--ease);
}
.nav-primary__link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:3px;
  height:2px;
  border-radius:2px;
  background:var(--lime);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .3s var(--ease);
}
.nav-primary__link:hover{ color:var(--porcelain); }
.nav-primary__link:hover::after{ transform:scaleX(1); }
.nav-primary__link[aria-current="page"]{ color:var(--porcelain); }
.nav-primary__link[aria-current="page"]::after{ transform:scaleX(1); }
.nav-primary__utility{ display:flex; align-items:center; }

/* ---------- 按钮 ---------- */
.btn{
  --btn-bg:transparent;
  --btn-fg:var(--porcelain);
  --btn-line:var(--line);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border-radius:var(--r-pill);
  border:1px solid var(--btn-line);
  background:var(--btn-bg);
  color:var(--btn-fg);
  font-family:var(--font-body);
  font-size:15px;
  line-height:1;
  letter-spacing:.02em;
  text-decoration:none;
  cursor:pointer;
  transition:background-color .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease),transform .25s var(--ease),box-shadow .25s var(--ease);
}
.btn:hover{ transform:translateY(-1px); }
.btn--lime{
  --btn-bg:var(--lime);
  --btn-fg:#070B09;
  --btn-line:var(--lime);
  font-weight:600;
}
.btn--lime:hover{ box-shadow:0 10px 28px rgba(198,255,79,.22); }
.btn--ghost{ --btn-line:#33513F; }
.btn--ghost:hover{ --btn-line:var(--lime); --btn-fg:var(--lime); }
.btn--sm{ padding:9px 18px; font-size:13.5px; }

/* ---------- 排版 ---------- */
.display{
  font-family:var(--font-display);
  font-weight:900;
  font-stretch:condensed;
  letter-spacing:-.02em;
  line-height:1.03;
  margin:0;
}
.display--xl{ font-size:clamp(48px,8.2vw,128px); }
.display--lg{ font-size:clamp(36px,5.2vw,76px); }
.display--md{ font-size:clamp(28px,3.4vw,52px); }

.editorial{
  font-family:var(--font-editorial);
  font-weight:600;
  letter-spacing:.01em;
  line-height:1.32;
  margin:0;
}
.editorial--lg{ font-size:clamp(25px,2.9vw,44px); }
.editorial--md{ font-size:clamp(20px,2.1vw,30px); }

.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.01em;
}
.lede{
  font-size:clamp(17px,1.5vw,20px);
  line-height:1.8;
  color:#D6DFD7;
  max-width:36em;
  margin:0 0 1em;
}
.prose{ max-width:38em; }
.prose p{ margin:0 0 1.15em; }
.prose a{ color:var(--lime); text-decoration:underline; text-underline-offset:3px; }

.label{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--mist);
}
.label::before{
  content:"";
  width:6px;height:6px;
  border-radius:50%;
  background:var(--lime);
  box-shadow:0 0 0 3px rgba(198,255,79,.14);
  flex:0 0 auto;
}
.label--amber::before{ background:var(--amber); box-shadow:0 0 0 3px rgba(255,155,49,.16); }
.label--cyan::before{ background:var(--cyan); box-shadow:0 0 0 3px rgba(63,224,192,.16); }

/* ---------- 章节与卡片 ---------- */
.section{
  position:relative;
  padding:clamp(54px,7.6vw,118px) 0;
}
.section--deep{
  background:linear-gradient(180deg,var(--deep) 0%,rgba(13,33,28,0) 94%);
}
.section--board{
  background:var(--deep);
  border-block:1px solid var(--line);
}
.section__head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:18px clamp(20px,3vw,48px);
  margin-bottom:clamp(26px,3.4vw,52px);
}
.hero{ position:relative; }
.hero--bleed{ margin-top:calc(-1 * var(--header-h)); padding-top:var(--header-h); }

.card{
  position:relative;
  padding:clamp(18px,2vw,26px);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  background:var(--board);
  transition:border-color .28s var(--ease),transform .28s var(--ease);
}
.card--quiet{
  background:rgba(20,49,40,.35);
  border-style:dashed;
}
.card__title{
  font-size:17px;
  font-weight:600;
  margin:0 0 8px;
  letter-spacing:.01em;
}
.card__meta{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--mist);
  margin:0;
}

.stat{
  display:flex;
  flex-direction:column;
  gap:8px;
}
.stat__value{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:clamp(30px,3.4vw,48px);
  line-height:1;
  color:var(--porcelain);
}
.stat__value--lime{ color:var(--lime); }
.stat__value--amber{ color:var(--amber); }
.stat__label{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.13em;
  text-transform:uppercase;
  color:var(--mist);
}

.chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 16px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:rgba(20,49,40,.5);
  color:var(--mist);
  font-size:13.5px;
  line-height:1;
  cursor:pointer;
  transition:background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.chip:hover{ color:var(--porcelain); border-color:#3A5B4E; }
.chip[aria-pressed="true"]{
  background:rgba(198,255,79,.12);
  border-color:var(--lime);
  color:var(--lime);
}

/* ---------- 面包屑 ---------- */
.breadcrumbs{
  margin:0 0 24px;
  font-size:12.5px;
  color:var(--mist);
}
.breadcrumbs ol{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  list-style:none;
}
.breadcrumbs li{
  display:flex;
  align-items:center;
  gap:10px;
}
.breadcrumbs li + li::before{
  content:"/";
  color:#395246;
}
.breadcrumbs a{
  color:var(--mist);
  text-decoration:none;
  transition:color .22s var(--ease);
}
.breadcrumbs a:hover{ color:var(--lime); }
.breadcrumbs [aria-current="page"]{ color:var(--porcelain); }

/* ---------- 图片容器基础规则 ---------- */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  border-radius:var(--r-lg);
  border:1px solid var(--line);
  background:linear-gradient(145deg,var(--board) 0%,var(--deep) 56%,#0A1713 100%);
  isolation:isolate;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(36,56,47,.55) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(36,56,47,.55) 1px,transparent 1px);
  background-size:56px 56px;
  opacity:.6;
}
.media-frame > img{
  position:relative;
  z-index:1;
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--16x9{ aspect-ratio:16 / 9; }
.media-frame--4x3{ aspect-ratio:4 / 3; }
.media-frame--1x1{ aspect-ratio:1 / 1; }
.media-frame--tall{ aspect-ratio:3 / 4; }
.media-frame__tag{
  position:absolute;
  z-index:2;
  left:18px;
  bottom:18px;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 14px;
  border-radius:var(--r-pill);
  border:1px solid rgba(198,255,79,.28);
  background:rgba(7,11,9,.74);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  color:var(--lime);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  text-transform:uppercase;
}

/* ---------- 滚动显现 ---------- */
.js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .42s var(--ease),transform .42s var(--ease);
}
.js [data-reveal].is-visible{
  opacity:1;
  transform:none;
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(60px,9vw,140px);
  padding:clamp(44px,5.6vw,84px) 0 clamp(20px,2.6vw,32px);
  background:linear-gradient(180deg,var(--deep) 0%,var(--ink) 78%);
  border-top:1px solid var(--line);
  color:var(--mist);
  font-size:14px;
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(36,56,47,.5) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(36,56,47,.5) 1px,transparent 1px);
  background-size:72px 72px;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.55),transparent 72%);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.55),transparent 72%);
  opacity:.55;
}
.footer-pulse{
  position:absolute;
  top:clamp(44px,5.6vw,84px);
  right:clamp(10px,2.4vw,38px);
  bottom:clamp(60px,8vw,120px);
  width:3px;
  border-radius:3px;
  background:linear-gradient(180deg,transparent,var(--lime) 45%,transparent);
  background-size:100% 200%;
  background-repeat:no-repeat;
  opacity:.75;
  animation:pulse-flow 5s linear infinite;
  pointer-events:none;
}
@keyframes pulse-flow{
  0%{ background-position:0 -100%; }
  100%{ background-position:0 100%; }
}
.footer-grid{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,1.5fr) repeat(3,minmax(0,1fr));
  gap:clamp(26px,3.6vw,56px);
  padding-right:clamp(14px,3.4vw,44px);
}
.footer-brand{
  display:flex;
  flex-direction:column;
  gap:18px;
}
.footer-brand__line{
  margin:0;
  max-width:32em;
  color:#7F8F86;
  font-size:13.5px;
  line-height:1.8;
}
.footer-col__title{
  margin:0 0 16px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.15em;
  text-transform:uppercase;
  color:#6E8177;
}
.footer-col__list{
  display:flex;
  flex-direction:column;
  gap:11px;
  list-style:none;
}
.footer-col__link{
  color:#BDCAC0;
  font-size:14px;
  text-decoration:none;
  transition:color .22s var(--ease);
}
.footer-col__link:hover{ color:var(--lime); }

.footer-contact{
  position:relative;
  margin-top:clamp(30px,3.4vw,52px);
  padding-top:clamp(22px,2.6vw,34px);
  border-top:1px solid var(--line);
}
.footer-contact__list{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(18px,2.4vw,36px);
  margin:0;
}
.footer-contact__item{
  display:flex;
  flex-direction:column;
  gap:7px;
  min-width:0;
}
.footer-contact__key{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.15em;
  text-transform:uppercase;
  color:#6E8177;
}
.footer-contact__val{
  margin:0;
  color:var(--porcelain);
  font-size:14px;
  line-height:1.6;
  overflow-wrap:anywhere;
}
.footer-contact__val.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:13.5px;
  letter-spacing:.02em;
}

.footer-legal{
  position:relative;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px clamp(20px,3vw,48px);
  margin-top:clamp(26px,3vw,44px);
  padding-top:18px;
  border-top:1px solid var(--line);
}
.footer-legal__line,
.footer-legal__note{
  margin:0;
  font-size:12.5px;
  color:#6E8177;
  line-height:1.7;
}
.footer-legal__note{ max-width:46em; }

/* ---------- 平板与移动 ---------- */
@media (max-width:1024px){
  .grid{ grid-template-columns:repeat(6,minmax(0,1fr)); }
  .col-main,
  .col-side,
  .col-rail,
  .col-full{ grid-column:1 / -1; }
  .footer-grid{ grid-template-columns:repeat(2,minmax(0,1fr)); }
  .footer-pulse{ opacity:.5; }
}

@media (max-width:940px){
  .nav-toggle{ display:inline-flex; }
  .nav-primary{
    position:fixed;
    inset:var(--header-h) 0 0 0;
    margin-left:0;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:22px var(--gutter) 48px;
    background:rgba(7,11,9,.97);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
    border-top:1px solid var(--line);
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transform:translateY(-10px);
    transition:opacity .28s var(--ease),transform .28s var(--ease),visibility .28s;
  }
  .nav-primary[data-open="true"]{
    opacity:1;
    visibility:visible;
    pointer-events:auto;
    transform:none;
  }
  .nav-primary__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .nav-primary__list li + li{ border-top:1px solid rgba(36,56,47,.75); }
  .nav-primary__link{
    display:block;
    padding:17px 2px;
    font-family:var(--font-display);
    font-size:19px;
    font-weight:600;
    color:#C7D3CA;
  }
  .nav-primary__link::after{ display:none; }
  .nav-primary__link[aria-current="page"]{ color:var(--lime); }
  .nav-primary__utility{ margin-top:28px; }
  body.nav-open{ overflow:hidden; }
  .footer-contact__list{ grid-template-columns:repeat(2,minmax(0,1fr)); }
}

@media (max-width:640px){
  body{ font-size:15.5px; }
  .brand__sub{ display:none; }
  .brand__mark{ height:26px; }
  .footer-grid{ grid-template-columns:minmax(0,1fr); }
  .footer-contact__list{ grid-template-columns:minmax(0,1fr); }
  .footer-legal{ flex-direction:column; align-items:flex-start; }
  .footer-pulse{
    right:10px;
    width:2px;
    opacity:.4;
  }
}

@media (prefers-reduced-motion:reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  .js [data-reveal],
  .js [data-reveal].is-visible{
    opacity:1;
    transform:none;
  }
  .footer-pulse{ animation:none; opacity:.45; }
}