*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion: no-preference){html{scroll-behavior:smooth}}
body{
  margin:0;
  background-color:#050A18;
  color:#E8EEF9;
  font-family:"Noto Sans SC","HarmonyOS Sans SC",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  font-size:16.5px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:radial-gradient(circle at 1px 1px,rgba(42,58,92,.5) 1px,transparent 0);
  background-size:34px 34px;
}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:900;letter-spacing:-.02em;line-height:1.14}
p{margin:0}
input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid #8FF4FF;outline-offset:3px;border-radius:8px}

:root{
  --bg:#050A18;
  --panel:#0B1326;
  --raise:#16233D;
  --line:#2A3A5C;
  --cold:#2FE0F0;
  --cold-2:#8FF4FF;
  --hot:#FF6B2C;
  --hot-2:#FFB25E;
  --ink:#E8EEF9;
  --ink-2:#93A4C0;
  --ok:#3DFFA8;
  --sans:"Noto Sans SC","HarmonyOS Sans SC",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  --mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --maxw:1240px;
  --wide:1440px;
  --r-lg:32px;
  --r-md:22px;
  --r-sm:14px;
  --header-h:78px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:absolute;left:16px;top:-70px;z-index:120;
  background:linear-gradient(120deg,#8FF4FF,#2FE0F0);color:#04121A;
  font-weight:800;font-size:14px;padding:11px 20px;border-radius:0 0 16px 16px;
  transition:top .22s var(--ease);
}
.skip-link:focus{top:0}

/* ---------- 阅读进度 ---------- */
.read-progress{position:fixed;top:0;left:0;right:0;height:3px;z-index:90;background:rgba(42,58,92,.35);pointer-events:none}
.read-progress__bar{
  display:block;height:100%;width:0;border-radius:0 3px 3px 0;
  background:linear-gradient(90deg,#2FE0F0,#8FF4FF);
  box-shadow:0 0 14px rgba(47,224,240,.6);
  transition:background-color .35s var(--ease),box-shadow .35s var(--ease),width .08s linear;
}
.read-progress__bar.is-past{
  background:linear-gradient(90deg,#FF6B2C,#FFB25E);
  box-shadow:0 0 14px rgba(255,107,44,.65);
}

/* ---------- 页头 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:linear-gradient(180deg,rgba(5,10,24,.78) 0%,rgba(5,10,24,0) 100%);
  border-bottom:1px solid transparent;
  transition:background-color .32s var(--ease),border-color .32s var(--ease),box-shadow .32s var(--ease),backdrop-filter .32s var(--ease);
}
.site-header[data-scrolled]{
  background:rgba(5,10,24,.94);
  border-bottom-color:var(--line);
  box-shadow:0 12px 34px rgba(0,0,0,.5);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
}
.header-inner{
  width:min(100% - 40px,var(--wide));
  margin-inline:auto;
  display:flex;align-items:center;gap:clamp(14px,2vw,32px);
  min-height:var(--header-h);
  transition:min-height .32s var(--ease);
}
.site-header[data-scrolled] .header-inner{min-height:64px}

.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto;min-width:0}
.brand__mark{
  width:38px;height:38px;flex:0 0 auto;border-radius:12px;
  display:grid;place-items:center;color:var(--cold-2);
  background:linear-gradient(145deg,rgba(47,224,240,.2),rgba(255,107,44,.16));
  border:1px solid rgba(47,224,240,.42);
  box-shadow:inset 0 0 16px rgba(47,224,240,.16);
}
.brand__mark svg{width:21px;height:21px}
.brand__text{display:flex;flex-direction:column;line-height:1.18;min-width:0}
.brand__name{font-weight:900;font-size:17px;letter-spacing:-.02em;white-space:nowrap}
.brand__tag{font-size:11.5px;color:var(--ink-2);letter-spacing:.02em;white-space:nowrap}

.nav{margin-left:auto;min-width:0}
.nav__list{display:flex;align-items:center;gap:clamp(2px,1vw,12px)}
.nav__link{
  position:relative;display:inline-block;padding:9px 13px;border-radius:999px;
  font-size:14.5px;font-weight:600;color:var(--ink-2);white-space:nowrap;
  transition:color .22s var(--ease),background-color .22s var(--ease);
}
.nav__link:hover{color:var(--ink);background:rgba(22,35,61,.85)}
.nav__link[aria-current="page"]{color:var(--cold-2);background:rgba(47,224,240,.08)}
.nav__link[aria-current="page"]::after{
  content:"";position:absolute;left:13px;right:13px;bottom:3px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--cold),rgba(47,224,240,0));
}

.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:11px 20px;border-radius:999px;border:1px solid var(--line);
  background:transparent;color:var(--ink);
  font-size:14.5px;font-weight:700;letter-spacing:.01em;white-space:nowrap;cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .24s var(--ease),background-color .24s var(--ease),border-color .24s var(--ease),color .24s var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn--primary{
  border-color:transparent;color:#04121A;
  background:linear-gradient(120deg,#8FF4FF,#2FE0F0 58%,#17B7C9);
  box-shadow:0 8px 26px rgba(47,224,240,.26);
}
.btn--primary:hover{box-shadow:0 12px 34px rgba(47,224,240,.44)}
.btn--hot{
  border-color:transparent;color:#20100A;
  background:linear-gradient(120deg,#FFB25E,#FF6B2C);
  box-shadow:0 8px 26px rgba(255,107,44,.28);
}
.btn--hot:hover{box-shadow:0 12px 34px rgba(255,107,44,.46)}
.btn--ghost{background:rgba(11,19,38,.75);color:var(--ink);border-color:var(--line)}
.btn--ghost:hover{border-color:rgba(47,224,240,.55);color:var(--cold-2)}
.btn--block{display:flex;width:100%}
.btn__dot{
  width:8px;height:8px;border-radius:50%;background:#04121A;flex:0 0 auto;
  box-shadow:0 0 0 3px rgba(4,18,26,.22);
}
.btn--download{position:relative;overflow:hidden}
.btn--download::after{
  content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;
  background:radial-gradient(circle at 18% 50%,rgba(255,255,255,.55),transparent 58%);
  opacity:.5;animation:wm-pulse 3.6s var(--ease) infinite;
}
@keyframes wm-pulse{0%,100%{opacity:.28}50%{opacity:.62}}

/* ---------- 汉堡 ---------- */
.nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:9px 15px;border-radius:999px;border:1px solid var(--line);
  background:rgba(11,19,38,.82);color:var(--ink);font-size:13.5px;font-weight:700;
}
.nav-toggle__bars{position:relative;display:block;width:16px;height:2px;background:currentColor;border-radius:2px}
.nav-toggle__bars::before,.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:currentColor;border-radius:2px;
  transition:transform .26s var(--ease);
}
.nav-toggle__bars::before{top:-5px}
.nav-toggle__bars::after{top:5px}
body[data-nav-open] .nav-toggle__bars{background:transparent}
body[data-nav-open] .nav-toggle__bars::before{transform:translateY(5px) rotate(45deg)}
body[data-nav-open] .nav-toggle__bars::after{transform:translateY(-5px) rotate(-45deg)}
body[data-nav-open]{overflow:hidden}

/* ---------- 抽屉 ---------- */
.drawer{
  position:fixed;top:0;right:0;bottom:0;z-index:80;
  width:min(88vw,344px);padding:18px 18px 28px;
  display:flex;flex-direction:column;gap:18px;
  background:#0B1326;border-left:1px solid var(--line);
  box-shadow:-26px 0 64px rgba(0,0,0,.6);
  transform:translateX(103%);
  transition:transform .34s var(--ease);
  overflow-y:auto;overscroll-behavior:contain;
}
.drawer[data-open]{transform:translateX(0)}
.drawer__head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:14px;border-bottom:1px solid var(--line)}
.drawer__title{font-family:var(--mono);font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--cold)}
.drawer__close{
  padding:7px 14px;border-radius:999px;border:1px solid var(--line);
  font-size:13px;font-weight:700;color:var(--ink-2);
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.drawer__close:hover{color:var(--cold-2);border-color:rgba(47,224,240,.5)}
.drawer__list{display:flex;flex-direction:column;gap:3px}
.drawer__link{
  display:block;padding:13px 14px;border-radius:var(--r-sm);
  font-size:15.5px;font-weight:700;color:var(--ink-2);border:1px solid transparent;
  transition:color .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease);
}
.drawer__link:hover{color:var(--ink);background:var(--raise)}
.drawer__link[aria-current="page"]{color:var(--cold-2);border-color:rgba(47,224,240,.42);background:rgba(47,224,240,.08)}
.drawer__foot{margin-top:auto;display:flex;flex-direction:column;gap:10px;padding-top:16px;border-top:1px solid var(--line)}
.drawer-backdrop{
  position:fixed;inset:0;z-index:70;
  background:rgba(3,6,14,.7);
  -webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);
  opacity:0;visibility:hidden;
  transition:opacity .3s var(--ease),visibility .3s var(--ease);
}
.drawer-backdrop[data-open]{opacity:1;visibility:visible}

/* ---------- 主体与容器 ---------- */
main{position:relative;z-index:1;padding-top:var(--header-h)}
main#main-content:focus{outline:none}
.hero--flush{margin-top:calc(-1 * var(--header-h))}
.container{width:min(100% - 40px,var(--wide));margin-inline:auto}
.container--narrow{width:min(100% - 40px,760px)}
.section{position:relative;padding-block:clamp(52px,7vw,104px)}
.section--tight{padding-block:clamp(28px,4vw,56px)}
.section--narrow{width:min(100% - 40px,780px);margin-inline:auto}

.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(16px,2vw,26px)}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-6{grid-column:span 6}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}
.span-12{grid-column:span 12}

/* ---------- 文字层级 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--mono);font-size:12px;font-weight:700;
  letter-spacing:.18em;text-transform:uppercase;color:var(--cold);
}
.eyebrow::before{content:"";width:22px;height:1px;background:currentColor;opacity:.7}
.display{font-size:clamp(34px,5.4vw,56px);font-weight:900;letter-spacing:-.025em;line-height:1.06}
.h2{font-size:clamp(26px,3.4vw,40px);font-weight:900;letter-spacing:-.02em;line-height:1.14}
.h3{font-size:clamp(19px,2.1vw,24px);font-weight:800;letter-spacing:-.015em}
.lede{font-size:clamp(16px,1.6vw,18.5px);color:#BFCDE4;line-height:1.8}
.muted{color:var(--ink-2)}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.01em}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* ---------- 面板 / 标签 / 读数 ---------- */
.panel{
  position:relative;background:var(--panel);
  border:1px solid var(--line);border-radius:var(--r-lg);
  padding:clamp(20px,2.6vw,30px);
  box-shadow:inset 0 1px 0 rgba(143,244,255,.06);
  transition:background-color .26s var(--ease),border-color .26s var(--ease),transform .26s var(--ease),box-shadow .26s var(--ease);
}
.panel--raise{background:var(--raise);border-color:rgba(47,224,240,.32)}
.panel:hover{border-color:rgba(47,224,240,.34)}
.panel__head{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:16px}
.panel__title{font-size:15px;font-weight:800;letter-spacing:.02em}

.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border-radius:999px;border:1px solid var(--line);
  font-family:var(--mono);font-size:11.5px;font-weight:700;letter-spacing:.08em;
  background:rgba(11,19,38,.7);color:var(--ink-2);
}
.chip--cold{color:var(--cold-2);border-color:rgba(47,224,240,.42);background:rgba(47,224,240,.1)}
.chip--hot{color:var(--hot-2);border-color:rgba(255,107,44,.44);background:rgba(255,107,44,.1)}
.chip--ok{color:var(--ok);border-color:rgba(61,255,168,.4);background:rgba(61,255,168,.09)}

.stat{display:flex;flex-direction:column;gap:4px}
.stat__num{font-family:var(--mono);font-size:clamp(24px,2.6vw,32px);font-weight:700;color:var(--cold-2);letter-spacing:-.02em}
.stat__label{font-size:12.5px;color:var(--ink-2);letter-spacing:.06em}

/* ---------- 媒体容器 ---------- */
.media-frame{
  position:relative;overflow:hidden;
  border-radius:var(--r-lg);border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(22,35,61,.92),rgba(11,19,38,.96));
  box-shadow:inset 0 1px 0 rgba(143,244,255,.08);
  min-height:200px;
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:16/7}
.media-frame--square{aspect-ratio:1/1}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--scan::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(180deg,rgba(143,244,255,.05) 0 1px,transparent 1px 4px);
}
.media-frame__label{
  position:absolute;left:14px;bottom:14px;z-index:2;
  padding:6px 13px;border-radius:999px;
  font-family:var(--mono);font-size:11px;font-weight:700;
  letter-spacing:.1em;text-transform:uppercase;color:var(--cold);
  background:rgba(5,10,24,.76);border:1px solid rgba(47,224,240,.38);
}

/* ---------- 面包屑 ---------- */
.breadcrumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:9px;
  font-size:13px;color:var(--ink-2);padding-block:20px;
}
.breadcrumbs__link{color:var(--ink-2);transition:color .2s var(--ease)}
.breadcrumbs__link:hover{color:var(--cold-2)}
.breadcrumbs__link[aria-current="page"]{color:var(--cold-2)}
.breadcrumbs li+li::before{content:"/";margin-right:9px;color:var(--line)}

/* ---------- 显现 / 章节高亮 / 标签页 / 筛选 ---------- */
.js [data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .24s ease-out,transform .24s ease-out}
.js [data-reveal].is-visible{opacity:1;transform:none}
[data-section-link].is-active{color:var(--cold-2)}
[data-tab-panel][hidden]{display:none}
[data-filter-item][hidden]{display:none}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;z-index:1;
  margin-top:clamp(48px,7vw,96px);
  padding:clamp(42px,5vw,68px) 0 28px;
  background:linear-gradient(180deg,rgba(11,19,38,0) 0%,rgba(11,19,38,.88) 24%,#0B1326 100%);
  border-top:1px solid var(--line);
}
.footer-inner{width:min(100% - 40px,var(--wide));margin-inline:auto}
.footer-top{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.9fr);gap:clamp(28px,4vw,64px)}
.footer-brand{display:flex;flex-direction:column;gap:16px;min-width:0}
.footer-brand__note{font-size:14.5px;color:var(--ink-2);line-height:1.8;max-width:34ch}
.footer-brand__cta{margin-top:2px}
.footer-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(18px,3vw,40px)}
.footer-col{min-width:0}
.footer-col__title{
  font-family:var(--mono);font-size:11.5px;font-weight:700;
  letter-spacing:.18em;text-transform:uppercase;color:var(--cold);margin-bottom:14px;
}
.footer-list{display:flex;flex-direction:column;gap:9px}
.footer-link{
  display:inline-block;font-size:14.5px;color:var(--ink-2);
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer-link:hover{color:var(--cold-2);transform:translateX(3px)}

.footer-contact{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:14px;margin-top:clamp(30px,4vw,48px);padding-top:26px;border-top:1px solid var(--line);
}
.footer-contact__item{
  display:flex;flex-direction:column;gap:7px;min-width:0;
  background:var(--bg);border:1px solid var(--line);border-radius:var(--r-md);
  padding:15px 16px;
  transition:border-color .24s var(--ease);
}
.footer-contact__item:hover{border-color:rgba(47,224,240,.34)}
.footer-contact__label{
  font-family:var(--mono);font-size:10.5px;font-weight:700;
  letter-spacing:.16em;text-transform:uppercase;color:var(--ink-2);
}
.footer-contact__value{
  display:flex;align-items:center;flex-wrap:wrap;gap:10px;
  font-size:14px;color:var(--ink);line-height:1.7;word-break:break-word;
}
.copy-btn{
  padding:3px 11px;border-radius:999px;border:1px solid var(--line);
  font-size:11.5px;font-weight:700;color:var(--cold);
  transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}
.copy-btn:hover{border-color:rgba(47,224,240,.55);background:rgba(47,224,240,.1)}
.copy-btn.is-done{color:#04121A;background:linear-gradient(120deg,#8FF4FF,#2FE0F0);border-color:transparent}

.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:14px 26px;margin-top:26px;padding-top:20px;
  border-top:1px solid rgba(42,58,92,.6);
  font-size:13px;color:var(--ink-2);
}
.footer-legal{margin:0}
.footer-legal__links{display:flex;flex-wrap:wrap;gap:20px}
.footer-legal__links a{color:var(--ink-2);transition:color .2s var(--ease)}
.footer-legal__links a:hover{color:var(--cold-2)}

/* ---------- 响应式 ---------- */
@media (max-width:1240px){
  .footer-contact{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:1100px){
  .brand__tag{display:none}
  .span-4,.span-5,.span-7,.span-8{grid-column:span 6}
}
@media (max-width:980px){
  .nav{display:none}
  .nav-toggle{display:inline-flex}
  .header-actions{margin-left:auto}
  .btn--download{padding:10px 16px;font-size:13.5px}
  .footer-top{grid-template-columns:minmax(0,1fr)}
  .span-4,.span-5,.span-6,.span-7,.span-8{grid-column:span 12}
}
@media (min-width:981px){
  .drawer,.drawer-backdrop{display:none}
}
@media (max-width:720px){
  body{font-size:16px}
  .container,.container--narrow,.section--narrow{width:min(100% - 32px,100%)}
  .header-inner{width:calc(100% - 28px)}
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
  .footer-contact{grid-template-columns:minmax(0,1fr)}
  .brand__mark{width:34px;height:34px;border-radius:11px}
  .brand__name{font-size:15.5px}
}
@media (max-width:480px){
  .nav-toggle__label{display:none}
  .nav-toggle{padding:10px 12px}
  .btn--download{font-size:12.5px;padding:9px 13px;gap:7px}
  .footer-cols{grid-template-columns:minmax(0,1fr)}
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .js [data-reveal]{opacity:1;transform:none}
  .btn:hover{transform:none}
  .footer-link:hover{transform:none}
}