:root{
  --ink:#071A2C;
  --ink-2:#0E2A44;
  --card:#143B5C;
  --line:#1B4E70;
  --cyan:#19E6D2;
  --orange:#FF8A3D;
  --sage:#A7C4B5;
  --mist:#E8F4F8;
  --muted:#8FA9BA;
  --batch:#FFD166;
  --paper:#F4F8F6;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",Consolas,"Courier New",monospace;
  --wrap:1240px;
  --radius-lg:26px;
  --radius-md:18px;
  --radius-pill:999px;
  --shadow-soft:0 24px 52px -34px rgba(2,10,20,.95);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.75;
  color:var(--mist);
  background-color:var(--ink);
  background-image:
    radial-gradient(1000px 520px at 84% -12%,rgba(25,230,210,.12),transparent 68%),
    radial-gradient(760px 460px at 4% 2%,rgba(255,138,61,.08),transparent 70%),
    linear-gradient(180deg,#071A2C 0%,#071A2C 58%,#061726 100%);
  background-repeat:no-repeat;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0}
ul,ol{list-style:none}
a{color:inherit}
img,svg{max-width:100%;display:block}
button{font:inherit}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:8px}
.wrap{width:min(var(--wrap),calc(100% - clamp(32px,7vw,96px)));margin-inline:auto}
.mono{font-family:var(--font-mono);letter-spacing:.12em}
.annot{font-family:var(--font-mono);font-size:11px;letter-spacing:.22em;color:var(--sage);writing-mode:vertical-rl;text-orientation:mixed}
.skip-link{
  position:fixed;top:10px;left:50%;z-index:200;
  transform:translate(-50%,-180%);
  padding:10px 22px;border-radius:var(--radius-pill);
  background:var(--cyan);color:#04231F;font-weight:700;font-size:14px;text-decoration:none;
  transition:transform .18s ease;
}
.skip-link:focus{transform:translate(-50%,0)}
/* ---------- 刊头 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(7,26,44,.93);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.read-progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;overflow:hidden;background:rgba(25,230,210,.14)}
.read-progress-bar{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:left center;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
  transition:transform .12s linear;
}
.masthead{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:18px;
  padding-block:20px 14px;
}
.masthead-line{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;
  color:var(--muted);text-transform:uppercase;display:flex;align-items:center;gap:10px;
}
.masthead-line::before{content:"";width:24px;height:1px;background:var(--cyan);flex:none}
.masthead-brand{
  justify-self:center;display:inline-flex;align-items:center;gap:13px;
  text-decoration:none;color:var(--mist);transition:transform .18s ease;
}
.masthead-brand:hover{transform:translateY(-1px)}
.brand-mark{
  position:relative;flex:none;width:38px;height:38px;border-radius:13px;
  background:
    radial-gradient(circle at 74% 22%,rgba(255,138,61,.95),transparent 58%),
    conic-gradient(from 210deg,#19E6D2,#143B5C 58%,#19E6D2);
  box-shadow:0 0 0 1px rgba(25,230,210,.42),0 14px 26px -18px rgba(25,230,210,.95);
}
.brand-mark::after{
  content:"";position:absolute;inset:11px;border-radius:50%;
  background:#071A2C;box-shadow:inset 0 0 0 2px rgba(25,230,210,.55);
}
.brand-text{display:flex;flex-direction:column;line-height:1}
.brand-name{font-size:clamp(22px,2.6vw,30px);font-weight:800;letter-spacing:.15em;color:var(--mist)}
.brand-sub{font-family:var(--font-mono);font-size:10px;letter-spacing:.32em;color:var(--cyan);margin-top:8px}
.masthead-actions{justify-self:end;display:flex;align-items:center;gap:8px}
.pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 18px;border-radius:var(--radius-pill);
  font-size:13px;font-weight:700;letter-spacing:.06em;text-decoration:none;
  border:1px solid var(--line);color:var(--mist);background:rgba(20,59,92,.55);
  transition:transform .18s ease,border-color .18s ease,color .18s ease,background .18s ease,box-shadow .18s ease;
}
.pill:hover{transform:translateY(-2px)}
.pill--ghost:hover{border-color:var(--cyan);color:var(--cyan);box-shadow:0 0 0 3px rgba(25,230,210,.14)}
.pill--accent{
  border-color:transparent;color:#0A1B2A;
  background:linear-gradient(135deg,#FF8A3D,#FF6E1F);
  box-shadow:0 14px 26px -18px rgba(255,138,61,.95);
}
.pill--accent:hover{box-shadow:0 18px 30px -16px rgba(255,138,61,.85)}
/* ---------- 栏目导航 ---------- */
.nav-rail{border-top:1px solid rgba(27,78,112,.6)}
.nav-rail-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:54px}
.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:9px 16px;border-radius:var(--radius-pill);
  border:1px solid var(--line);background:rgba(20,59,92,.6);
  color:var(--mist);font-size:13px;font-weight:700;letter-spacing:.14em;cursor:pointer;
  transition:border-color .18s ease,color .18s ease;
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle-label{line-height:1}
.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;border-radius:2px;
  background:currentColor;transition:transform .18s ease,top .18s ease;
}
.nav-toggle-bars::before{top:1px}
.nav-toggle-bars::after{top:9px}
.nav-toggle[aria-expanded="true"]{border-color:var(--cyan);color:var(--cyan)}
.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)}
.primary-nav{flex:1 1 auto}
.nav-list{display:flex;flex-wrap:wrap;align-items:center;gap:clamp(6px,1.8vw,28px);counter-reset:nav}
.nav-item{counter-increment:nav}
.nav-link{
  position:relative;display:inline-flex;align-items:baseline;gap:7px;
  padding:16px 2px;font-size:14.5px;font-weight:600;letter-spacing:.05em;
  text-decoration:none;color:#C6DCE6;transition:color .18s ease;
}
.nav-link::before{
  content:counter(nav,decimal-leading-zero);
  font-family:var(--font-mono);font-size:10px;letter-spacing:.1em;color:var(--muted);
  transition:color .18s ease;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:9px;height:2px;border-radius:2px;
  background:var(--cyan);transform:scaleX(0);transform-origin:left center;
  transition:transform .18s ease;
}
.nav-link:hover{color:var(--mist)}
.nav-link:hover::before{color:var(--cyan)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--cyan)}
.nav-link[aria-current="page"]::before{color:var(--cyan)}
.nav-link[aria-current="page"]::after{transform:scaleX(1);box-shadow:0 0 12px rgba(25,230,210,.65)}
.nav-note{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;
  color:var(--muted);white-space:nowrap;
}
/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;margin-top:clamp(56px,8vw,110px);
  background:linear-gradient(180deg,#0A2238 0%,#071A2C 62%,#061726 100%);
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:2px;
  background:linear-gradient(90deg,transparent,var(--cyan),var(--orange),transparent);
  opacity:.72;
}
.footer-top{
  display:grid;grid-template-columns:minmax(240px,1.15fr) 1.35fr minmax(220px,.95fr);
  gap:clamp(24px,4vw,60px);
  padding-block:clamp(44px,6vw,78px) clamp(32px,4vw,52px);
}
.footer-brand{display:flex;flex-direction:column;align-items:flex-start;gap:16px}
.footer-logo{
  display:inline-flex;align-items:center;gap:10px;
  font-size:clamp(22px,2.6vw,28px);font-weight:800;letter-spacing:.16em;
  color:var(--mist);text-decoration:none;
}
.footer-logo::before{
  content:"";width:11px;height:11px;border-radius:4px;flex:none;
  background:linear-gradient(135deg,var(--cyan),var(--orange));
  box-shadow:0 0 14px rgba(25,230,210,.55);
}
.footer-desc{font-size:14.5px;line-height:1.85;color:var(--muted);max-width:34ch}
.footer-cols{display:grid;grid-template-columns:repeat(2,minmax(120px,1fr));gap:clamp(20px,3vw,40px)}
.footer-col{display:flex;flex-direction:column;gap:12px}
.footer-col-title{
  font-family:var(--font-mono);font-size:11.5px;font-weight:600;
  letter-spacing:.24em;color:var(--sage);
  padding-bottom:10px;border-bottom:1px solid rgba(27,78,112,.75);
}
.footer-list{display:flex;flex-direction:column;gap:9px}
.footer-link{
  display:inline-block;font-size:14.5px;color:#C6DCE6;text-decoration:none;
  transition:color .18s ease,transform .18s ease;
}
.footer-link:hover{color:var(--cyan);transform:translateX(3px)}
.footer-contact{display:flex;flex-direction:column;gap:12px}
.footer-contact-list{display:flex;flex-direction:column;gap:12px}
.footer-contact-item{display:flex;flex-direction:column;gap:2px}
.footer-contact-label{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.2em;color:var(--muted)}
.footer-contact-value{font-size:14px;color:var(--mist);word-break:break-word;line-height:1.6}
.footer-contact-note{font-size:12.5px;line-height:1.7;color:var(--muted)}
.footer-legal{border-top:1px solid rgba(27,78,112,.8);background:rgba(7,26,44,.55)}
.footer-legal-inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:12px 24px;padding-block:18px;
}
.footer-icp{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;color:var(--muted)}
.footer-legal-links{display:flex;flex-wrap:wrap;gap:6px 22px}
.footer-legal-links .footer-link{font-size:12.5px;color:var(--muted)}
.footer-legal-links .footer-link:hover{transform:none}
/* ---------- 通用按钮与标签 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:12px 24px;border-radius:var(--radius-pill);
  font-size:14.5px;font-weight:700;letter-spacing:.06em;text-decoration:none;
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease,color .18s ease,background .18s ease;
}
.btn--primary{
  background:linear-gradient(135deg,#19E6D2,#12B7A8);color:#04231F;
  box-shadow:0 14px 30px -18px rgba(25,230,210,.95);
}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 20px 36px -18px rgba(25,230,210,.85)}
.btn--ghost{border-color:var(--line);background:rgba(20,59,92,.45);color:var(--mist)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);transform:translateY(-2px)}
.btn--warm{background:linear-gradient(135deg,#FF8A3D,#FF6E1F);color:#0A1B2A;box-shadow:0 14px 30px -18px rgba(255,138,61,.95)}
.btn--warm:hover{transform:translateY(-2px)}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:var(--radius-pill);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;font-weight:600;
  border:1px solid var(--line);background:rgba(20,59,92,.6);color:#CFE3EC;
  text-decoration:none;transition:border-color .18s ease,color .18s ease,background .18s ease;
}
.chip:hover{border-color:var(--cyan);color:var(--cyan);background:rgba(25,230,210,.1)}
/* ---------- 章节与排版 ---------- */
.section{padding-block:clamp(40px,6vw,88px)}
.section--tight{padding-block:clamp(26px,4vw,54px)}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:16px 28px;margin-bottom:clamp(22px,3vw,38px);
}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.24em;
  color:var(--cyan);text-transform:uppercase;
}
.eyebrow::before{content:"";width:20px;height:2px;border-radius:2px;background:currentColor;flex:none}
.display-title{font-size:clamp(30px,5.2vw,64px);line-height:1.06;font-weight:800;letter-spacing:-.01em;color:var(--mist)}
.lede{font-size:clamp(15px,1.5vw,17.5px);line-height:1.82;color:#B9D0DB;max-width:44ch}
/* ---------- 面板与网格 ---------- */
.panel{
  border:1px solid var(--line);border-radius:var(--radius-lg);
  background:linear-gradient(160deg,rgba(20,59,92,.9),rgba(14,42,68,.92));
  padding:clamp(20px,2.6vw,32px);
  box-shadow:var(--shadow-soft);
}
.panel--link{
  display:block;text-decoration:none;color:inherit;
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.panel--link:hover{
  transform:translateY(-2px);
  border-color:rgba(25,230,210,.55);
  box-shadow:0 0 0 3px rgba(25,230,210,.14),var(--shadow-soft);
}
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(16px,2.2vw,28px)}
.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}
.index-flow{display:grid;gap:clamp(14px,1.8vw,22px)}
.anchor-rail{position:sticky;top:132px;display:grid;gap:14px;align-content:start}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.14em;
  color:var(--muted);margin-bottom:18px;
}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px}
.breadcrumb li + li::before{content:"/";color:var(--line)}
.breadcrumb a{color:var(--muted);text-decoration:none;transition:color .18s ease}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb [aria-current="page"]{color:var(--mist)}
/* ---------- 图片容器基础规则 ---------- */
.media-frame{
  position:relative;overflow:hidden;
  width:100%;aspect-ratio:16 / 9;
  border-radius:var(--radius-md);border:1px solid var(--line);
  background:
    radial-gradient(120% 90% at 82% 8%,rgba(25,230,210,.18),transparent 62%),
    radial-gradient(90% 70% at 8% 96%,rgba(255,138,61,.14),transparent 66%),
    repeating-linear-gradient(90deg,rgba(143,169,186,.16) 0 1px,transparent 1px 28px),
    repeating-linear-gradient(0deg,rgba(143,169,186,.1) 0 1px,transparent 1px 28px),
    #0E2A44;
}
.media-frame img,.media-frame video{width:100%;height:100%;object-fit:cover;display:block}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame--tall{aspect-ratio:3 / 4}
/* ---------- 显现动效 ---------- */
.js-ready [data-reveal]{opacity:0;transform:translateY(16px);transition:opacity .5s ease,transform .5s cubic-bezier(.22,.8,.3,1)}
.js-ready [data-reveal].is-visible{opacity:1;transform:none}
/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .span-8,.span-7,.span-5{grid-column:1 / -1}
  .span-4,.span-6{grid-column:span 6}
  .anchor-rail{position:static}
  .footer-top{grid-template-columns:1.1fr 1.1fr}
  .footer-contact{grid-column:1 / -1}
}
@media (max-width:900px){
  .masthead{grid-template-columns:1fr auto;padding-block:14px 10px}
  .masthead-line{display:none}
  .masthead-brand{justify-self:start}
  .brand-name{letter-spacing:.1em}
  .nav-toggle{display:inline-flex}
  .nav-rail-inner{flex-wrap:wrap;padding-block:10px 0;align-items:center;gap:12px}
  .primary-nav{display:none;flex:1 0 100%;order:3}
  .primary-nav[data-open="true"]{display:block}
  .nav-list{flex-direction:column;align-items:stretch;gap:0;padding-bottom:14px}
  .nav-item{border-top:1px solid rgba(27,78,112,.55)}
  .nav-link{width:100%;padding:14px 4px;font-size:16px}
  .nav-link::after{bottom:6px}
  .nav-note{display:none}
}
@media (max-width:700px){
  .grid-12{grid-template-columns:1fr}
  .span-4,.span-5,.span-6,.span-7,.span-8,.span-12{grid-column:1 / -1}
  .footer-top{grid-template-columns:1fr;gap:32px}
  .footer-contact{grid-column:auto}
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-legal-inner{justify-content:flex-start}
}
@media (max-width:520px){
  .brand-mark{width:30px;height:30px;border-radius:10px}
  .brand-mark::after{inset:9px}
  .brand-name{font-size:22px;letter-spacing:.08em}
  .brand-sub{font-size:9px;letter-spacing:.24em;margin-top:6px}
  .pill{padding:8px 12px;font-size:12px;letter-spacing:.02em}
  .footer-cols{grid-template-columns:1fr}
}
@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-ready [data-reveal]{opacity:1;transform:none}
  .pill:hover,.btn:hover,.panel--link:hover,.footer-link:hover{transform:none}
}