:root{
  --ink-900:#0B1B2B;
  --ink-800:#12314A;
  --teal-700:#12707E;
  --teal-400:#1FBFD0;
  --orange-600:#FF6A2B;
  --orange-300:#FFA36B;
  --lime-400:#C8FF3D;
  --paper:#F5F6F2;
  --paper-2:#DDE3DF;
  --ink-text:#20303C;
  --alert:#E03B3B;

  --line:rgba(18,112,126,.22);
  --line-strong:rgba(18,112,126,.42);
  --line-dark:rgba(31,191,208,.26);
  --line-dark-strong:rgba(31,191,208,.5);

  --font-display:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono","Courier New",monospace;

  --rail:252px;
  --radius:2px;
  --ease:cubic-bezier(.2,.7,.3,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0}
h1,h2,h3,h4,h5,p,ul,ol,dl,dd,figure,blockquote{margin:0}
ul,ol{padding:0}
ul[class],ol[class]{list-style:none}
a{color:inherit;text-decoration:none}
img,svg,video,canvas{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:3px solid var(--lime-400);outline-offset:3px}
::selection{background:var(--lime-400);color:var(--ink-900)}

body{
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  color:var(--ink-text);
  background-color:var(--paper);
  background-image:
    repeating-linear-gradient(to right,rgba(18,112,126,.07) 0 1px,transparent 1px 88px),
    repeating-linear-gradient(to bottom,rgba(18,112,126,.07) 0 1px,transparent 1px 88px);
  min-height:100vh;
}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:900;letter-spacing:.04em;line-height:1.16;color:var(--ink-900)}
h1{font-size:clamp(32px,5vw,56px)}
h2{font-size:clamp(24px,3.4vw,38px)}
h3{font-size:clamp(19px,2.2vw,24px);font-weight:800}
h4{font-size:17px;font-weight:800}

@media (min-width:1024px){
  body{padding-left:var(--rail)}
}

/* ============ 共享按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  font-family:var(--font-display);font-weight:800;font-size:15px;letter-spacing:.06em;line-height:1;
  padding:14px 22px;border:1px solid transparent;border-radius:var(--radius);
  cursor:pointer;text-align:center;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.btn--primary{background:var(--orange-600);color:var(--ink-900);border-color:var(--orange-600)}
.btn--primary:hover{background:var(--orange-300);border-color:var(--orange-300);transform:translateY(-1px)}
.btn--ghost{background:transparent;color:var(--teal-400);border-color:var(--line-dark-strong)}
.btn--ghost:hover{background:rgba(31,191,208,.14);color:var(--paper)}
.btn--block{display:flex;width:100%}

/* ============ 页头：左侧框架栏 / 移动窄条 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--ink-900);
  color:var(--paper);
  border-bottom:1px solid var(--line-dark);
  background-image:
    repeating-linear-gradient(to right,rgba(31,191,208,.07) 0 1px,transparent 1px 44px);
}
.skip-link{
  position:fixed;top:10px;left:10px;z-index:120;
  background:var(--lime-400);color:var(--ink-900);
  font-weight:800;font-size:14px;letter-spacing:.06em;
  padding:10px 16px;border-radius:var(--radius);
  transform:translateY(-180%);
  transition:transform .2s var(--ease);
}
.skip-link:focus-visible{transform:translateY(0)}

.header-rail{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:12px 16px;
}
.brand{display:flex;align-items:center;gap:10px;min-width:0}
.brand__link{display:flex;flex-direction:column;gap:1px;color:var(--paper)}
.brand__mark{
  font-family:var(--font-display);font-weight:900;font-size:21px;
  letter-spacing:.08em;line-height:1.1;
}
.brand__sub{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--teal-400);
}
.brand__coord{display:none}

.nav-toggle{
  display:inline-flex;align-items:center;gap:10px;
  background:transparent;border:1px solid var(--line-dark-strong);border-radius:var(--radius);
  color:var(--paper);padding:10px 12px;cursor:pointer;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  transition:border-color .2s var(--ease),background-color .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--teal-400);background:rgba(31,191,208,.12)}
.nav-toggle__bars{position:relative;display:block;width:18px;height:12px}
.nav-toggle__bar{
  position:absolute;left:0;right:0;height:2px;background:var(--teal-400);
  transition:transform .24s var(--ease);
}
.nav-toggle__bar:nth-child(1){top:0}
.nav-toggle__bar:nth-child(2){bottom:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2){transform:translateY(-5px) rotate(-45deg)}
.nav-toggle__text{white-space:nowrap}

.site-nav{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  max-height:84vh;overflow:auto;
  padding:18px 18px calc(20px + env(safe-area-inset-bottom));
  background:var(--ink-800);
  border-top:2px solid var(--teal-400);
  border-radius:6px 6px 0 0;
  visibility:hidden;
  transform:translateY(110%);
  transition:transform .28s var(--ease),visibility .28s var(--ease);
}
.site-nav[data-open]{visibility:visible;transform:translateY(0)}
.site-nav__label{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.24em;
  text-transform:uppercase;color:rgba(245,246,242,.5);
  padding-bottom:12px;margin-bottom:12px;
  border-bottom:1px dashed var(--line-dark);
}
.nav-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.nav-link{
  display:flex;align-items:center;gap:8px;
  padding:12px 10px;
  border:1px solid var(--line-dark);border-radius:var(--radius);
  background:rgba(255,255,255,.03);
  color:var(--paper);font-family:var(--font-display);font-weight:700;
  font-size:14px;letter-spacing:.04em;line-height:1.3;
  transition:background-color .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.nav-link:hover{background:rgba(31,191,208,.14);border-color:var(--line-dark-strong)}
.nav-link__num{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.06em;
  color:var(--teal-400);flex:0 0 auto;
}
.nav-link__text{min-width:0}
.nav-link[aria-current="page"]{
  background:rgba(255,106,43,.18);
  border-color:var(--orange-600);
  color:#fff;
}
.nav-link[aria-current="page"] .nav-link__num{color:var(--lime-400)}

.nav-foot{margin-top:16px;border-top:1px dashed var(--line-dark);padding-top:14px}
.nav-foot__status{
  display:flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  color:rgba(245,246,242,.68);margin-bottom:12px;
}
.dot-live{
  display:inline-block;width:8px;height:8px;flex:0 0 auto;border-radius:50%;
  background:var(--lime-400);box-shadow:0 0 0 0 rgba(200,255,61,.55);
  animation:pulse 2.4s var(--ease) infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(200,255,61,.5)}
  70%{box-shadow:0 0 0 9px rgba(200,255,61,0)}
  100%{box-shadow:0 0 0 0 rgba(200,255,61,0)}
}

.header-note{display:none}
.header-edge{display:none}
body.nav-open{overflow:hidden}

@media (min-width:1024px){
  .site-header{
    position:fixed;inset:0 auto 0 0;width:var(--rail);height:100vh;
    border-bottom:0;border-right:1px solid var(--line-dark-strong);
    background-image:
      repeating-linear-gradient(to bottom,rgba(31,191,208,.08) 0 1px,transparent 1px 44px);
  }
  .header-rail{
    flex-direction:column;align-items:stretch;justify-content:flex-start;gap:0;
    height:100%;padding:24px 26px 22px 20px;overflow:auto;
  }
  .brand{flex-direction:column;align-items:flex-start;gap:6px;padding-bottom:14px;border-bottom:1px solid var(--line-dark)}
  .brand__mark{font-size:25px}
  .brand__coord{
    display:block;font-family:var(--font-mono);font-size:10px;
    letter-spacing:.24em;color:rgba(245,246,242,.4);
  }
  .nav-toggle{display:none}
  .site-nav{
    position:static;visibility:visible;transform:none;
    max-height:none;overflow:visible;
    display:flex;flex-direction:column;flex:1 1 auto;
    margin-top:20px;padding:0;background:none;border:0;border-radius:0;
  }
  .site-nav__label{padding-bottom:8px;margin-bottom:8px}
  .nav-list{grid-template-columns:1fr;gap:0}
  .nav-link{
    padding:9px 10px 9px 12px;border:0;border-left:2px solid transparent;
    border-radius:0;background:transparent;font-size:14px;
  }
  .nav-link:hover{background:rgba(31,191,208,.12);border-left-color:var(--line-dark-strong)}
  .nav-link[aria-current="page"]{
    background:linear-gradient(90deg,rgba(255,106,43,.26),rgba(255,106,43,0));
    border-left-color:var(--orange-600);color:#fff;
  }
  .nav-foot{margin-top:auto}
  .header-note{
    display:block;margin-top:12px;padding-top:12px;
    border-top:1px dashed var(--line-dark);
    font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;
    color:rgba(245,246,242,.45);line-height:1.7;
  }
  .header-edge{
    display:block;position:absolute;right:8px;top:50%;
    transform:translateY(-50%);
    writing-mode:vertical-rl;
    font-family:var(--font-mono);font-size:10px;letter-spacing:.34em;
    color:rgba(31,191,208,.45);pointer-events:none;
  }
  body.nav-open{overflow:auto}
}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--ink-900);
  color:rgba(245,246,242,.78);
  border-top:3px solid var(--teal-700);
  font-size:15px;
  background-image:
    repeating-linear-gradient(to right,rgba(31,191,208,.07) 0 1px,transparent 1px 44px),
    repeating-linear-gradient(to bottom,rgba(31,191,208,.05) 0 1px,transparent 1px 44px),
    linear-gradient(160deg,rgba(18,112,126,.4),rgba(11,27,43,0) 62%);
}
.footer-inner{
  width:100%;max-width:1180px;margin-inline:auto;
  padding:clamp(34px,5vw,62px) clamp(18px,4vw,44px) 26px;
}
.footer-top{
  display:grid;grid-template-columns:1fr;gap:clamp(24px,3.5vw,40px);
  padding-bottom:clamp(22px,3vw,34px);
  border-bottom:1px solid var(--line-dark);
}
.footer-brand__mark{
  font-family:var(--font-display);font-weight:900;font-size:24px;
  letter-spacing:.08em;color:var(--paper);line-height:1.2;
}
.footer-brand__sub{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  color:var(--teal-400);margin-top:8px;
}
.footer-brand__note{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  color:rgba(245,246,242,.45);margin-top:10px;
}
.footer-col__title{
  font-family:var(--font-mono);font-size:11px;font-weight:700;
  letter-spacing:.22em;text-transform:uppercase;color:var(--lime-400);
  padding-bottom:8px;margin-bottom:12px;
  border-bottom:1px solid var(--line-dark);
}
.footer-col__title::before{content:"— ";color:rgba(200,255,61,.5)}
.footer-list li{margin-bottom:9px;line-height:1.5}
.footer-list a{
  color:rgba(245,246,242,.82);
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-list a:hover{color:var(--paper);border-bottom-color:var(--teal-400)}
.footer-contact__line{
  display:flex;gap:10px;font-size:14px;line-height:1.7;margin-bottom:8px;
  color:rgba(245,246,242,.82);
}
.footer-contact__key{
  flex:0 0 auto;min-width:38px;
  font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;
  color:var(--teal-400);padding-top:3px;
}
.footer-source{
  display:flex;gap:10px;align-items:flex-start;
  margin:clamp(18px,2.6vw,28px) 0;
  padding:12px 14px;
  border-left:3px solid var(--orange-600);
  background:rgba(18,112,126,.16);
  font-size:13px;line-height:1.7;color:rgba(245,246,242,.72);
}
.footer-source__key{
  flex:0 0 auto;font-family:var(--font-mono);font-size:10px;
  letter-spacing:.16em;color:var(--orange-300);padding-top:3px;
}
.footer-legal{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 18px;
  padding-top:16px;border-top:1px dashed var(--line-dark);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  color:rgba(245,246,242,.45);
}
@media (min-width:640px){
  .footer-top{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:1024px){
  .footer-top{grid-template-columns:1.5fr 1fr 1fr 1.5fr;gap:32px}
}

/* ============ 滚动进度 ============ */
.scroll-meter{
  position:fixed;top:0;left:0;right:0;height:3px;z-index:90;
  background:rgba(31,191,208,.14);pointer-events:none;
}
.scroll-meter__fill{
  display:block;width:100%;height:100%;
  background:linear-gradient(90deg,var(--teal-400),var(--lime-400));
  transform:scaleX(var(--p,0));transform-origin:left center;
}
@media (min-width:1024px){
  .scroll-meter{
    top:0;left:calc(var(--rail) - 3px);right:auto;bottom:0;
    width:3px;height:auto;background:rgba(245,246,242,.1);
  }
  .scroll-meter__fill{
    background:linear-gradient(180deg,var(--teal-400),var(--orange-600));
    transform:scaleY(var(--p,0));transform-origin:center top;
  }
}

/* ============ 容器与章节 ============ */
.container{
  width:100%;max-width:1180px;margin-inline:auto;
  padding-inline:clamp(18px,4vw,44px);
}
.section{
  padding-block:clamp(40px,6vw,80px);
  border-top:1px solid var(--line);
}
.section__head{
  display:grid;gap:10px;max-width:780px;
  margin-bottom:clamp(20px,3vw,36px);
}
.section__tag{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;
  text-transform:uppercase;color:var(--teal-700);
}
.section__tag::before{content:"— ";color:var(--orange-600)}
.section__title{font-family:var(--font-display);font-weight:900;font-size:clamp(26px,3.6vw,40px);letter-spacing:.04em;line-height:1.16;color:var(--ink-900)}
.section__note{max-width:38ch;font-size:15px;line-height:1.75;color:#41525e}
.lead{font-size:clamp(17px,1.6vw,19px);line-height:1.8;max-width:38ch;color:#33454f}
.eyebrow{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--teal-700);
}
.coord{
  display:inline-block;font-family:var(--font-mono);font-size:12px;
  letter-spacing:.1em;color:var(--teal-700);
  padding:2px 7px;border:1px solid var(--line);
  background:rgba(221,227,223,.5);border-radius:var(--radius);
}
.prose{max-width:40em;font-size:17px;line-height:1.8}
.prose p{margin-bottom:1em}
.prose h3{margin:1.6em 0 .5em}
.prose ul{list-style:disc;padding-left:1.2em}
.rule{border:0;border-top:1px solid var(--line);margin:0}

/* ============ 网格 ============ */
.grid{display:grid;gap:clamp(14px,2vw,24px)}
.grid--2{grid-template-columns:1fr}
.grid--3{grid-template-columns:1fr}
.grid--asym{grid-template-columns:1fr}
@media (min-width:720px){
  .grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:1024px){
  .grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
  .grid--asym{grid-template-columns:1.35fr .65fr;align-items:start}
}

/* ============ 卡片与叠层纸 ============ */
.panel{
  position:relative;
  background:var(--paper);
  border:1px solid #C6D1CC;
  border-radius:var(--radius);
  padding:clamp(18px,2.4vw,26px);
}
.panel--ink{
  background:linear-gradient(155deg,var(--ink-800),var(--ink-900) 70%);
  color:rgba(245,246,242,.86);
  border-color:var(--line-dark-strong);
}
.panel--ink h3,.panel--ink h4{color:var(--paper)}
.sheet{
  position:relative;
  background:#fff;
  border:1px solid #C6D1CC;
  border-radius:var(--radius);
  padding:clamp(18px,2.4vw,24px);
}
.sheet--stacked{margin:10px 12px 12px 0}
.sheet--stacked::before,
.sheet--stacked::after{
  content:"";position:absolute;inset:auto;border:1px solid #C6D1CC;background:#fff;
  border-radius:var(--radius);z-index:-1;
}
.sheet--stacked::before{top:6px;left:6px;right:-6px;bottom:-6px;background:rgba(18,112,126,.08)}
.sheet--stacked::after{top:12px;left:12px;right:-12px;bottom:-12px;background:rgba(255,106,43,.08);border-color:rgba(255,106,43,.28)}

/* ============ 标签与筛选 ============ */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  padding:4px 8px;border:1px solid var(--line-strong);
  color:var(--teal-700);background:rgba(31,191,208,.1);
  border-radius:var(--radius);line-height:1.5;
}
.tag--live{background:var(--lime-400);border-color:var(--lime-400);color:var(--ink-900)}
.tag--hot{background:var(--orange-600);border-color:var(--orange-600);color:var(--ink-900)}

.chip{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  padding:8px 14px;border:1px solid var(--line-strong);
  background:transparent;color:var(--ink-900);
  border-radius:var(--radius);cursor:pointer;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.chip:hover{background:rgba(18,112,126,.12)}
.chip[aria-pressed="true"]{background:var(--ink-900);color:var(--paper);border-color:var(--ink-900)}
[data-filter-item].is-filtered-out{display:none}
[data-filter-empty]{
  padding:18px;border:1px dashed var(--line-strong);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  color:#5b6b76;
}

/* ============ 数据 ============ */
.data-bar{
  position:relative;height:10px;overflow:hidden;
  background:rgba(18,112,126,.12);
  border:1px solid var(--line);
  border-radius:1px;
}
.data-bar__fill{
  display:block;height:100%;width:var(--fill,0%);
  background:linear-gradient(90deg,var(--teal-700),var(--teal-400));
  transition:width .6s var(--ease);
}
.data-rail{
  border-left:1px solid var(--line-strong);
  padding-left:14px;
  font-family:var(--font-mono);font-size:12px;line-height:1.7;
  color:#4b5c68;
}
.data-rail a{
  display:block;padding:7px 0;
  border-bottom:1px dashed var(--line);
  transition:color .18s var(--ease);
}
.data-rail a:hover{color:var(--orange-600)}

/* ============ 主题带 ============ */
.band{
  background:linear-gradient(120deg,var(--ink-900),var(--ink-800) 62%,var(--teal-700));
  color:var(--paper);
  border-block:1px solid var(--line-dark);
}
.band__inner{
  display:flex;gap:clamp(14px,2.4vw,30px);
  align-items:stretch;
  overflow-x:auto;
  padding:18px clamp(18px,4vw,44px);
  scrollbar-width:thin;
}
.band__inner > *{flex:0 0 auto}

/* ============ 面包屑 ============ */
.breadcrumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:.5em;
  padding-block:16px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--teal-700);
}
.breadcrumbs a{border-bottom:1px solid transparent;transition:border-color .18s var(--ease)}
.breadcrumbs a:hover{border-bottom-color:var(--teal-400)}
.breadcrumbs span[aria-hidden="true"]{color:var(--line-strong)}

/* ============ 图片容器 ============ */
.media{
  position:relative;overflow:hidden;
  border:1px solid rgba(11,27,43,.18);
  border-radius:var(--radius);
  background:linear-gradient(150deg,var(--ink-800),var(--teal-700) 60%,var(--orange-600));
  aspect-ratio:16/9;
}
.media img{
  width:100%;height:100%;object-fit:cover;
  filter:saturate(1.02);
}
.media--16x9{aspect-ratio:16/9}
.media--4x3{aspect-ratio:4/3}
.media--1x1{aspect-ratio:1/1}
.media--wide{aspect-ratio:21/9}
.media__caption{
  position:absolute;left:0;bottom:0;
  padding:6px 10px;
  background:rgba(11,27,43,.76);color:var(--paper);
  font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;
}

/* ============ 提示 ============ */
.notice{
  border-left:3px solid var(--teal-700);
  background:rgba(221,227,223,.62);
  padding:14px 16px;font-size:15px;line-height:1.7;
  border-radius:var(--radius);
}
.notice--alert{border-left-color:var(--alert);background:rgba(224,59,59,.08)}

/* ============ 入场显现 ============ */
.has-js [data-reveal]{
  opacity:0;
  transform:translate3d(-18px,12px,0);
  transition:opacity .3s var(--ease),transform .32s var(--ease);
}
.has-js [data-reveal].is-visible{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .has-js [data-reveal]{opacity:1;transform:none}
  .dot-live{animation:none;box-shadow:0 0 0 3px rgba(200,255,61,.25)}
}