/* ========== 01 重置 ========== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{max-width:100%;display:block}
button,input,select,textarea{font:inherit;color:inherit}
a{color:inherit;text-decoration:none}
:focus{outline:none}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}

/* ========== 02 令牌 ========== */
:root{
  --night:#04140F;
  --turf:#0A231C;
  --board:#12382C;
  --line:#1E4A3C;
  --cyan:#35F0C0;
  --cyan-soft:#9BFFE4;
  --mark:#FF6A3D;
  --amber:#FFC24B;
  --chalk:#F2FBF7;
  --mist:#8FA8A0;
  --wrap:1200px;
  --gutter:clamp(16px,4vw,40px);
  --radius:14px;
  --radius-lg:22px;
  --header-h:68px;
  --space:clamp(16px,2.4vw,28px);
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
}

/* ========== 03 基础与中文排版 ========== */
body{
  background:var(--night);
  color:var(--chalk);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
@media (min-width:768px){body{font-size:18px}}
h1,h2,h3,h4{font-weight:800;line-height:1.14;letter-spacing:-.015em}
h1{font-size:clamp(32px,6.2vw,56px)}
h2{font-size:clamp(25px,4vw,40px)}
h3{font-size:clamp(20px,2.6vw,28px)}
h4{font-size:20px;line-height:1.35}
p{max-width:34em}
strong{font-weight:700;color:var(--cyan-soft)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.03em}
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.wrap--narrow{max-width:860px}
.stack{display:grid;gap:var(--space)}
.stack--tight{gap:12px}
.link-more{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:15px;color:var(--cyan)}
.link-more::after{content:"→";transition:transform .18s ease}
.link-more:hover::after{transform:translateX(4px)}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;color:var(--cyan);margin-bottom:14px}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--cyan)}
.lede{font-size:clamp(17px,2vw,20px);line-height:1.8;color:rgba(242,251,247,.82);max-width:34em}
.prose{max-width:34em}
.prose p + p{margin-top:1.1em}
.prose h3{margin-top:2em;margin-bottom:.6em}
.prose ul{margin-top:1em;display:grid;gap:.5em}
.prose ul li{position:relative;padding-left:1.3em;color:rgba(242,251,247,.86)}
.prose ul li::before{content:"";position:absolute;left:0;top:.72em;width:7px;height:7px;border-radius:50%;background:var(--mark)}

/* ========== 04 跳转链接 ========== */
.skip-link{
  position:fixed;left:14px;top:-64px;z-index:200;
  background:var(--cyan);color:var(--night);font-weight:700;font-size:15px;
  padding:11px 18px;border-radius:0 0 12px 12px;transition:top .18s ease;
}
.skip-link:focus{top:0}

/* ========== 05 命令栏头部 ========== */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(4,20,15,.9);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.header-progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;pointer-events:none}
.header-progress::after{
  content:"";display:block;height:100%;
  background:linear-gradient(90deg,var(--cyan),var(--cyan-soft));
  transform:scaleX(var(--progress,0));transform-origin:left;
}
.header-inner{
  display:flex;align-items:center;gap:clamp(12px,2.2vw,28px);
  height:var(--header-h);transition:height .22s ease;
}
.site-header.is-condensed .header-inner{height:56px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand__mark{
  display:grid;place-items:center;width:36px;height:36px;flex:0 0 auto;
  border-radius:11px;background:var(--board);border:1px solid var(--line);
  font-family:var(--font-mono);font-size:13px;font-weight:700;color:var(--cyan);
}
.brand__text{display:flex;flex-direction:column;line-height:1.2}
.brand__name{font-size:16px;font-weight:800;letter-spacing:-.01em}
.brand__sub{font-size:11.5px;color:var(--mist);letter-spacing:.02em}
.cmd-nav{display:flex;flex:1 1 auto;min-width:0}
.cmd-nav__list{display:flex;align-items:center;gap:2px}
.cmd-nav__link{
  position:relative;display:inline-flex;align-items:baseline;gap:7px;
  padding:9px 11px;border-radius:9px;font-size:15px;font-weight:600;
  color:rgba(242,251,247,.76);white-space:nowrap;
  transition:background .18s ease,color .18s ease;
}
.cmd-nav__link:hover{background:var(--turf);color:var(--chalk)}
.cmd-nav__idx{font-family:var(--font-mono);font-size:11px;color:var(--line)}
.cmd-nav__link:hover .cmd-nav__idx{color:var(--cyan)}
.cmd-nav__link[aria-current="page"]{color:var(--cyan)}
.cmd-nav__link[aria-current="page"] .cmd-nav__idx{color:var(--cyan-soft)}
.cmd-nav__link[aria-current="page"]::after{
  content:"";position:absolute;left:11px;right:11px;bottom:2px;height:2px;
  border-radius:2px;background:var(--cyan);
}
.cmd-tools{display:flex;align-items:center;gap:10px;margin-left:auto;flex:0 0 auto}
.cmd-status{
  display:inline-flex;align-items:center;gap:7px;padding:5px 11px;
  border:1px dashed var(--line);border-radius:999px;
  font-size:12.5px;color:var(--mist);white-space:nowrap;
}
.dot{width:7px;height:7px;border-radius:50%;background:var(--cyan);animation:pulse 2.4s ease-out infinite}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(53,240,192,.55)}
  70%{box-shadow:0 0 0 8px rgba(53,240,192,0)}
  100%{box-shadow:0 0 0 0 rgba(53,240,192,0)}
}
.nav-toggle{
  display:none;align-items:center;gap:9px;padding:8px 13px;cursor:pointer;
  background:transparent;border:1px solid var(--line);border-radius:999px;
  color:var(--chalk);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle__bars{position:relative;display:inline-block;width:18px;height:12px}
.nav-toggle__bars::before,.nav-toggle__bars::after{
  content:"";position:absolute;left:0;right:0;height:2px;background:currentColor;
  transition:transform .2s ease;
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{bottom:0}
.nav-toggle__label{font-size:13.5px;font-weight:600}
.site-header[data-open] .nav-toggle__bars::before{transform:translateY(5px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bars::after{transform:translateY(-5px) rotate(-45deg)}

/* ========== 06 按钮 ========== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  padding:11px 18px;border-radius:999px;border:1px solid var(--line);
  background:var(--turf);color:var(--chalk);
  font-size:15px;font-weight:700;line-height:1.2;cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.btn:hover{border-color:var(--cyan);color:var(--cyan)}
.btn--primary{background:var(--cyan);border-color:var(--cyan);color:var(--night)}
.btn--primary:hover{background:var(--cyan-soft);border-color:var(--cyan-soft);color:var(--night)}
.btn--ghost{background:transparent}
.btn--ghost:hover{background:var(--turf);color:var(--cyan)}
.btn--mark{background:var(--mark);border-color:var(--mark);color:var(--night)}
.btn--mark:hover{background:#ff8358;border-color:#ff8358;color:var(--night)}
.btn--sm{padding:7px 14px;font-size:13.5px}

/* ========== 07 分区与栅格 ========== */
.section{position:relative;padding-block:clamp(40px,7vw,88px)}
.section--tight{padding-block:clamp(28px,4vw,48px)}
.section--board{background:var(--board)}
.section--turf{background:var(--turf)}
.section--light{background:var(--chalk);color:var(--night)}
.section--light .lede,.section--light .prose ul li{color:rgba(4,20,15,.78)}
.section--light .eyebrow{color:#0C7A5C}
.section--light .eyebrow::before{background:var(--mark)}
.section--light strong{color:#0B5B45}
.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(16px,2vw,24px)}
.g-3{grid-column:span 3}
.g-4{grid-column:span 4}
.g-5{grid-column:span 5}
.g-6{grid-column:span 6}
.g-7{grid-column:span 7}
.g-8{grid-column:span 8}
.g-9{grid-column:span 9}
.g-12{grid-column:span 12}
.grid-bg{
  background-image:linear-gradient(rgba(30,74,60,.7) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(30,74,60,.7) 1px,transparent 1px);
  background-size:48px 48px;background-position:center;
}
.slant-divider{
  height:clamp(26px,4vw,52px);
  background:var(--turf);
  clip-path:polygon(0 0,100% 0,100% 34%,0 100%);
}
.section-head{display:grid;gap:14px;max-width:60ch;margin-bottom:clamp(22px,3vw,38px)}

/* ========== 08 卡片、标签、数字 ========== */
.card{
  position:relative;padding:clamp(18px,2.6vw,28px);
  background:var(--turf);border:1px solid var(--line);border-radius:var(--radius-lg);
}
.card--board{background:var(--board)}
.card--mark{border-color:rgba(255,106,61,.55)}
.card__kicker{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  color:var(--cyan);margin-bottom:10px;
}
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:4px 11px;
  border-radius:999px;border:1px solid rgba(53,240,192,.35);
  background:rgba(53,240,192,.1);color:var(--cyan-soft);
  font-size:12.5px;font-weight:600;
}
.tag--mark{color:var(--mark);border-color:rgba(255,106,61,.45);background:rgba(255,106,61,.12)}
.tag--amber{color:var(--amber);border-color:rgba(255,194,75,.4);background:rgba(255,194,75,.12)}
.tag--plain{color:var(--mist);border-color:var(--line);background:transparent}
.score{display:flex;flex-direction:column;gap:6px}
.score__num{
  font-family:var(--font-mono);font-weight:700;line-height:.95;
  font-size:clamp(32px,6vw,72px);color:var(--amber);
  letter-spacing:-.02em;font-variant-numeric:tabular-nums;
}
.score__num--cyan{color:var(--cyan)}
.score__num--mark{color:var(--mark)}
.score__label{font-size:13px;color:var(--mist);letter-spacing:.02em}
.kv{display:grid;gap:10px}
.kv__row{display:flex;justify-content:space-between;gap:16px;padding-bottom:10px;border-bottom:1px dashed var(--line)}
.kv__row:last-child{border-bottom:0;padding-bottom:0}
.kv__key{color:var(--mist);font-size:14.5px}
.kv__val{font-family:var(--font-mono);font-weight:700;color:var(--chalk)}

/* ========== 09 时间轴与面包屑 ========== */
.timeline{display:grid;gap:24px;padding-left:22px;border-left:1px solid var(--line)}
.timeline__item{position:relative}
.timeline__item::before{
  content:"";position:absolute;left:-27px;top:.6em;width:9px;height:9px;
  border-radius:50%;background:var(--night);border:2px solid var(--cyan);
}
.timeline__date{font-family:var(--font-mono);font-size:12.5px;color:var(--amber);letter-spacing:.06em}
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding-block:16px;font-family:var(--font-mono);font-size:12.5px;color:var(--mist);
}
.crumbs a:hover{color:var(--cyan)}
.crumbs__sep{color:var(--line)}
.crumbs [aria-current="page"]{color:var(--cyan-soft)}

/* ========== 10 图片容器（页面阶段使用） ========== */
.media{
  position:relative;display:block;width:100%;overflow:hidden;
  aspect-ratio:16/9;border-radius:var(--radius);
  border:1px solid var(--line);
  background:linear-gradient(155deg,var(--board),var(--night) 72%);
}
.media::before{
  content:"";position:absolute;inset:0;z-index:0;
  background-image:linear-gradient(rgba(30,74,60,.55) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(30,74,60,.55) 1px,transparent 1px);
  background-size:34px 34px;opacity:.55;
}
.media img,.media video{position:absolute;inset:0;z-index:1;width:100%;height:100%;object-fit:cover}
.media__cap{
  position:absolute;left:12px;bottom:10px;z-index:2;
  font-family:var(--font-mono);font-size:12px;color:var(--cyan-soft);
  background:rgba(4,20,15,.72);padding:3px 9px;border-radius:999px;
}
.media--4x3{aspect-ratio:4/3}
.media--1x1{aspect-ratio:1/1}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:3/4}
.gallery{display:grid;gap:clamp(12px,1.6vw,20px);grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}

/* ========== 11 标签页与折叠 ========== */
.tabs{
  background:var(--turf);border:1px solid var(--line);
  border-radius:var(--radius-lg);overflow:hidden;
}
.tabs__list{
  display:flex;gap:4px;padding:8px;overflow-x:auto;
  border-bottom:1px solid var(--line);
}
.tabs__tab{
  appearance:none;border:0;background:transparent;cursor:pointer;
  padding:10px 16px;border-radius:999px;white-space:nowrap;
  font-size:15px;font-weight:600;color:var(--mist);
  transition:background .18s ease,color .18s ease;
}
.tabs__tab:hover{color:var(--chalk);background:rgba(18,56,44,.7)}
.tabs__tab[aria-selected="true"]{background:var(--board);color:var(--cyan)}
.tabs__panel{padding:clamp(18px,3vw,32px)}
.tabs__panel[hidden]{display:none}
.accordion{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--turf)}
.accordion__item + .accordion__item{border-top:1px solid var(--line)}
.accordion__btn{
  width:100%;text-align:left;cursor:pointer;background:transparent;border:0;
  padding:16px 18px;font-size:16.5px;font-weight:700;color:var(--chalk);
  display:flex;align-items:center;justify-content:space-between;gap:14px;
}
.accordion__btn::after{content:"+";font-family:var(--font-mono);color:var(--cyan);font-size:18px}
.accordion__btn[aria-expanded="true"]::after{content:"–"}
.accordion__body{padding:0 18px 18px}
.accordion__body[hidden]{display:none}

/* ========== 12 显现动画 ========== */
[data-reveal]{
  opacity:0;transform:translateY(12px);
  transition:opacity .32s ease,transform .32s ease;
  transition-delay:var(--reveal-delay,0ms);
}
[data-reveal].is-visible{opacity:1;transform:none}

/* ========== 13 页脚 ========== */
.site-footer{
  position:relative;
  background:linear-gradient(180deg,var(--night) 0%,var(--turf) 78%);
  border-top:1px solid var(--line);
  margin-top:clamp(44px,7vw,92px);
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--cyan) 0%,rgba(53,240,192,0) 42%,rgba(255,106,61,0) 58%,var(--mark) 100%);
}
.footer-inner{
  display:grid;grid-template-columns:minmax(200px,1fr) 2.6fr;
  gap:clamp(24px,4vw,56px);
  padding-block:clamp(36px,6vw,72px);
}
.footer-brand{display:grid;align-content:start;gap:12px}
.footer-brand__name{font-size:19px;font-weight:800;letter-spacing:-.01em}
.footer-brand__copy{font-size:14px;line-height:1.7;color:var(--mist);max-width:22em}
.footer-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:clamp(16px,2.4vw,32px)}
.foot-col__title{
  display:flex;align-items:center;gap:8px;margin-bottom:14px;
  font-family:var(--font-mono);font-size:12px;font-weight:700;
  letter-spacing:.1em;color:var(--cyan-soft);
}
.foot-col__title::before{content:"";width:8px;height:8px;background:var(--cyan);border-radius:2px}
.foot-list{display:grid;gap:9px}
.foot-list__link{
  display:inline-block;font-size:14.5px;color:var(--mist);
  transition:color .18s ease,transform .18s ease;
}
.foot-list__link:hover{color:var(--cyan);transform:translateX(3px)}
.foot-list--plain li{font-size:14px;color:var(--mist);line-height:1.6}
.foot-list__note{color:rgba(143,168,160,.85);font-size:13px}
.footer-base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;
  padding-block:18px;border-top:1px solid var(--line);
}
.footer-base__legal{font-size:13px;color:var(--mist);max-width:none}
.footer-base__meta{font-size:12.5px;color:var(--mist)}

/* ========== 14 响应式 ========== */
@media (max-width:1100px){
  .cmd-tools .btn--ghost{display:none}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:30px}
  .footer-inner{grid-template-columns:1fr}
}
@media (max-width:1024px){
  .grid{grid-template-columns:repeat(6,minmax(0,1fr))}
  .g-3,.g-4,.g-5{grid-column:span 3}
  .g-6,.g-7,.g-8,.g-9{grid-column:span 6}
}
@media (max-width:960px){
  :root{--header-h:62px}
  .nav-toggle{display:inline-flex}
  .cmd-nav{
    position:fixed;left:0;right:0;top:var(--header-h);
    display:block;padding:10px var(--gutter) 22px;
    background:var(--night);border-bottom:1px solid var(--line);
    max-height:calc(100vh - var(--header-h));overflow-y:auto;
    opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity .2s ease,transform .2s ease,visibility .2s ease;
  }
  .site-header[data-open] .cmd-nav{opacity:1;visibility:visible;transform:none}
  .cmd-nav__list{flex-direction:column;align-items:stretch;gap:2px}
  .cmd-nav__link{
    display:flex;justify-content:flex-start;gap:12px;
    padding:15px 12px;border-radius:10px;font-size:17px;
    border-bottom:1px solid var(--line);
  }
  .cmd-nav__link[aria-current="page"]::after{left:12px;right:auto;width:34px;bottom:6px}
  .cmd-nav__idx{font-size:12px;min-width:22px}
  .brand__sub{display:none}
}
@media (max-width:640px){
  .grid{grid-template-columns:1fr}
  .grid > [class*="g-"]{grid-column:1/-1}
  .cmd-status{display:none}
  .footer-grid{grid-template-columns:1fr}
  .footer-base{flex-direction:column;align-items:flex-start}
  .brand__name{font-size:15px}
}

/* ========== 15 无障碍与减少动态 ========== */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  [data-reveal]{opacity:1;transform:none}
  .dot{animation:none;box-shadow:none}
  .link-more:hover::after,.foot-list__link:hover{transform:none}
}