:root{
  --bg:#F7F8FA;
  --surface:#FFFFFF;
  --surface-alt:#EEF1F5;
  --text:#17202A;
  --text-secondary:#334155;
  --text-muted:#4B5563;
  --heading:#0F172A;
  --border:#D7DEE7;
  --brand:#1D4ED8;
  --brand-strong:#1E3A8A;
  --brand-soft:#E8EEFB;
  --footer-bg:#111827;
  --footer-text:#E5E7EB;
  --footer-muted:#CBD5E1;
  --shadow:0 10px 30px rgba(15,23,42,.08);
  --shadow-hover:0 18px 44px rgba(29,78,216,.18);
  --glass:rgba(255,255,255,.72);
  --glass-border:rgba(255,255,255,.55);
  --grad-a:#1D4ED8;
  --grad-b:#7C3AED;
  --grad-c:#0EA5E9;
  --banner-grad:linear-gradient(135deg,#1D4ED8 0%,#6D28D9 48%,#0EA5E9 100%);
  --radius:16px;
  --radius-sm:10px;
}
html[data-theme="dark"]{
  --bg:#0B1220;
  --surface:#111A2B;
  --surface-alt:#162238;
  --text:#E5E7EB;
  --text-secondary:#CBD5E1;
  --text-muted:#A8B3C4;
  --heading:#FFFFFF;
  --border:#2A3A55;
  --brand:#60A5FA;
  --brand-strong:#93C5FD;
  --brand-soft:#1B2A44;
  --footer-bg:#070C16;
  --footer-text:#E2E8F0;
  --footer-muted:#B6C2D4;
  --shadow:0 10px 30px rgba(0,0,0,.45);
  --shadow-hover:0 18px 44px rgba(96,165,250,.22);
  --glass:rgba(17,26,43,.62);
  --glass-border:rgba(96,165,250,.22);
  --grad-a:#3B82F6;
  --grad-b:#8B5CF6;
  --grad-c:#22D3EE;
  --banner-grad:linear-gradient(135deg,#1E3A8A 0%,#5B21B6 48%,#0E7490 100%);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB","Source Han Sans SC",Arial,sans-serif;
  background:var(--bg);
  background-image:radial-gradient(1200px 600px at 12% -8%,rgba(29,78,216,.10),transparent 60%),radial-gradient(900px 520px at 92% 4%,rgba(124,58,237,.10),transparent 62%);
  background-attachment:fixed;
  color:var(--text);
  line-height:1.8;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
html[data-theme="dark"] body{
  background-image:radial-gradient(1200px 600px at 12% -8%,rgba(96,165,250,.12),transparent 60%),radial-gradient(900px 520px at 92% 4%,rgba(139,92,246,.12),transparent 62%);
}
a{color:var(--brand);text-decoration:none;transition:color .25s ease,background-color .25s ease,border-color .25s ease,box-shadow .25s ease,transform .25s ease}
a:hover,a:focus{color:var(--brand-strong);text-decoration:underline}
img,svg{max-width:100%;display:block}
h1,h2,h3,h4{color:var(--heading);line-height:1.35;margin:0 0 .6em;letter-spacing:.2px}
h1{font-size:34px;font-weight:800}
h2{font-size:26px;font-weight:700}
h3{font-size:20px;font-weight:700}
h4{font-size:17px;font-weight:700}
p{margin:0 0 1em;color:var(--text)}
ul{padding-left:1.2em}
li{margin-bottom:.35em}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--brand);color:#fff;padding:10px 16px;z-index:9999;border-radius:0 0 10px 0}
.skip-link:focus{left:12px;top:12px;color:#fff}
header.site-header{
  position:sticky;top:0;z-index:100;
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(160%);
  backdrop-filter:blur(14px) saturate(160%);
  border-bottom:1px solid var(--glass-border);
  box-shadow:var(--shadow);
  transition:background-color .3s ease,border-color .3s ease;
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 0}
.brand{display:flex;align-items:center;gap:12px;transition:transform .3s ease}
.brand:hover{transform:translateY(-2px)}
.brand svg{border-radius:12px;box-shadow:0 8px 20px rgba(29,78,216,.28)}
.brand-text{display:flex;flex-direction:column}
.brand-name{font-size:20px;font-weight:800;color:var(--heading)}
.brand-slogan{font-size:12px;color:var(--text-muted)}
nav.main-nav ul{display:flex;gap:18px;list-style:none;margin:0;padding:0;flex-wrap:wrap}
nav.main-nav a{
  position:relative;color:var(--text-secondary);font-weight:600;font-size:15px;padding:4px 2px;
  transition:color .25s ease
}
nav.main-nav a::after{
  content:"";position:absolute;left:0;right:100%;bottom:-2px;height:2px;border-radius:2px;
  background:var(--banner-grad);transition:right .3s ease
}
nav.main-nav a:hover,nav.main-nav a:focus{color:var(--brand-strong);text-decoration:none}
nav.main-nav a:hover::after,nav.main-nav a:focus::after{right:0}
.header-tools{display:flex;align-items:center;gap:10px}
.search-box{
  display:flex;align-items:center;gap:8px;
  background:var(--surface-alt);
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  padding:6px 10px;
  transition:border-color .25s ease,box-shadow .25s ease,transform .25s ease
}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 4px var(--brand-soft);transform:translateY(-1px)}
.search-box input{border:none;background:transparent;color:var(--text);font-size:14px;outline:none;width:150px}
.search-box input::placeholder{color:var(--text-muted)}
.search-box button{
  border:none;background:var(--banner-grad);color:#fff;border-radius:8px;padding:6px 12px;font-size:14px;cursor:pointer;font-weight:700;
  transition:transform .25s ease,box-shadow .25s ease,filter .25s ease
}
.search-box button:hover,.search-box button:focus{transform:translateY(-1px);box-shadow:0 8px 18px rgba(29,78,216,.3);filter:brightness(1.06);color:#fff}
.theme-toggle,.menu-toggle{
  border:1px solid var(--border);
  background:var(--surface-alt);
  color:var(--text-secondary);
  border-radius:var(--radius-sm);
  padding:7px 12px;font-size:14px;cursor:pointer;font-weight:600;
  transition:color .25s ease,border-color .25s ease,transform .25s ease,box-shadow .25s ease
}
.theme-toggle:hover,.theme-toggle:focus,.menu-toggle:hover,.menu-toggle:focus{
  color:var(--brand-strong);border-color:var(--brand);transform:translateY(-1px);box-shadow:0 8px 18px rgba(29,78,216,.16)
}
.menu-toggle{display:none}
.breadcrumb{padding:14px 0;font-size:14px;color:var(--text-muted)}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0}
.breadcrumb li+li::before{content:"/";margin-right:8px;color:var(--border)}
.breadcrumb a{color:var(--text-secondary)}
.breadcrumb a:hover,.breadcrumb a:focus{color:var(--brand-strong)}
.banner{
  position:relative;overflow:hidden;
  background:var(--banner-grad);
  border-bottom:1px solid var(--border);
  color:#fff;
  animation:bannerShift 18s ease-in-out infinite alternate;
  background-size:180% 180%;
}
@keyframes bannerShift{
  0%{background-position:0% 50%}
  100%{background-position:100% 50%}
}
.banner::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(600px 300px at 15% 20%,rgba(255,255,255,.22),transparent 60%),radial-gradient(500px 260px at 85% 80%,rgba(255,255,255,.16),transparent 62%);
  pointer-events:none;
}
.banner-slides{position:relative;min-height:340px}
.banner-slide{display:none;padding:54px 0;position:relative;z-index:1}
.banner-slide.active{display:block;animation:fadeSlide .7s ease both}
@keyframes fadeSlide{
  from{opacity:0;transform:translateY(18px)}
  to{opacity:1;transform:none}
}
.banner-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:34px;align-items:center}
.banner-tag{
  display:inline-block;
  background:rgba(255,255,255,.18);
  border:1px solid rgba(255,255,255,.35);
  color:#fff;
  border-radius:999px;padding:6px 14px;font-size:13px;font-weight:700;margin-bottom:14px;
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
}
.banner-slide h1,.banner-slide h2{font-size:32px;margin-bottom:14px;color:#fff;text-shadow:0 2px 18px rgba(0,0,0,.22)}
.banner-desc{font-size:16px;color:rgba(255,255,255,.92);max-width:560px}
.banner-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}
.btn{
  display:inline-block;border-radius:var(--radius-sm);padding:11px 20px;font-weight:700;font-size:15px;border:1px solid transparent;cursor:pointer;
  transition:transform .28s ease,box-shadow .28s ease,background-color .28s ease,color .28s ease,border-color .28s ease
}
.btn-primary{background:#fff;color:var(--brand-strong);box-shadow:0 10px 26px rgba(0,0,0,.18)}
.btn-primary:hover,.btn-primary:focus{transform:translateY(-3px);box-shadow:0 16px 34px rgba(0,0,0,.26);color:var(--brand-strong);text-decoration:none}
.btn-ghost{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.5);color:#fff;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}
.btn-ghost:hover,.btn-ghost:focus{transform:translateY(-3px);background:rgba(255,255,255,.22);color:#fff;text-decoration:none}
.banner-dots{display:flex;gap:8px;justify-content:center;padding:0 0 18px;position:relative;z-index:1}
.banner-dots button{
  width:10px;height:10px;border-radius:50%;border:none;background:rgba(255,255,255,.45);cursor:pointer;
  transition:width .3s ease,background-color .3s ease,transform .3s ease
}
.banner-dots button:hover{transform:scale(1.25)}
.banner-dots button.active{background:#fff;width:26px;border-radius:999px}
section{padding:52px 0;position:relative}
section.alt{background:var(--surface)}
section.alt::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(29,78,216,.04),transparent 40%)
}
.section-head{max-width:820px;margin-bottom:26px}
.section-head h2{position:relative;padding-bottom:12px}
.section-head h2::after{
  content:"";position:absolute;left:0;bottom:0;width:64px;height:4px;border-radius:4px;background:var(--banner-grad)
}
.section-head p{color:var(--text-secondary)}
.grid{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{
  position:relative;
  background:var(--glass);
  -webkit-backdrop-filter:blur(12px) saturate(150%);
  backdrop-filter:blur(12px) saturate(150%);
  border:1px solid var(--glass-border);
  border-radius:var(--radius);
  padding:22px;
  box-shadow:var(--shadow);
  transition:transform .32s ease,box-shadow .32s ease,border-color .32s ease
}
.card::after{
  content:"";position:absolute;inset:0;border-radius:var(--radius);pointer-events:none;
  background:linear-gradient(140deg,rgba(255,255,255,.35),transparent 45%);
  opacity:0;transition:opacity .32s ease
}
.card:hover,.card:focus-within{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:var(--brand)}
.card:hover::after{opacity:1}
.card h3{font-size:18px}
.card p{color:var(--text-secondary);font-size:15px}
.card .meta{font-size:13px;color:var(--text-muted)}
.stat-value{font-size:30px;font-weight:800;color:var(--brand-strong)}
.stat-label{font-size:14px;color:var(--text-muted)}
.timeline{list-style:none;margin:0;padding:0;border-left:3px solid var(--brand)}
.timeline li{position:relative;padding:0 0 22px 22px;margin:0}
.timeline li::before{
  content:"";position:absolute;left:-9px;top:6px;width:14px;height:14px;border-radius:50%;
  background:var(--brand);border:3px solid var(--surface);
  transition:transform .3s ease,box-shadow .3s ease
}
.timeline li:hover::before{transform:scale(1.2);box-shadow:0 0 0 6px var(--brand-soft)}
.timeline strong{color:var(--heading)}
.timeline p{color:var(--text-secondary);margin:4px 0 0}
table{width:100%;border-collapse:collapse;font-size:15px;background:var(--surface);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
caption{caption-side:top;text-align:left;font-weight:700;color:var(--heading);padding-bottom:10px}
th,td{border:1px solid var(--border);padding:12px;text-align:left;color:var(--text)}
th{background:var(--surface-alt);color:var(--heading);font-weight:700}
tbody tr{transition:background-color .25s ease}
tbody tr:hover{background:var(--brand-soft)}
.faq-item{
  border:1px solid var(--border);border-radius:var(--radius);margin-bottom:12px;
  background:var(--glass);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  overflow:hidden;transition:box-shadow .3s ease,border-color .3s ease,transform .3s ease
}
.faq-item:hover{border-color:var(--brand);box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.faq-question{
  width:100%;text-align:left;background:transparent;border:none;padding:16px 18px;font-size:16px;font-weight:700;color:var(--heading);cursor:pointer;
  display:flex;justify-content:space-between;gap:14px;align-items:center;transition:color .25s ease
}
.faq-question:hover,.faq-question:focus{color:var(--brand-strong)}
.faq-answer{display:none;padding:0 18px 18px;color:var(--text-secondary);font-size:15px;animation:fadeSlide .35s ease both}
.faq-item.open .faq-answer{display:block}
.faq-item.open{box-shadow:var(--shadow-hover);border-color:var(--brand)}
.faq-icon{
  font-weight:800;color:var(--brand-strong);flex:0 0 auto;width:26px;height:26px;line-height:24px;text-align:center;
  border-radius:50%;border:1px solid var(--border);background:var(--surface-alt);transition:transform .3s ease,background-color .3s ease
}
.faq-item.open .faq-icon{transform:rotate(180deg);background:var(--brand-soft)}
.howto-step{
  border-left:4px solid var(--brand);
  background:var(--glass);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-radius:0 var(--radius) var(--radius) 0;
  padding:16px 20px;margin-bottom:14px;
  transition:transform .3s ease,box-shadow .3s ease
}
.howto-step:hover{transform:translateX(6px);box-shadow:var(--shadow-hover)}
.howto-step h4{color:var(--heading);margin-bottom:6px}
.howto-step p{color:var(--text-secondary);margin:0}
.article-list{display:grid;gap:16px}
.article-item{
  display:grid;grid-template-columns:160px 1fr;gap:18px;
  border:1px solid var(--glass-border);border-radius:var(--radius);padding:16px;
  background:var(--glass);
  -webkit-backdrop-filter:blur(12px) saturate(150%);
  backdrop-filter:blur(12px) saturate(150%);
  align-items:center;
  transition:transform .32s ease,box-shadow .32s ease,border-color .32s ease
}
.article-item:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover);border-color:var(--brand)}
.article-item svg{border-radius:12px;transition:transform .35s ease}
.article-item:hover svg{transform:scale(1.04)}
.article-item h3{font-size:17px;margin-bottom:6px}
.article-item p{font-size:14px;color:var(--text-secondary);margin-bottom:8px}
.article-item .meta{font-size:13px;color:var(--text-muted)}
.article-item a{font-weight:700}
.contact-list{list-style:none;margin:0;padding:0}
.contact-list li{padding:10px 0;border-bottom:1px dashed var(--border);color:var(--text-secondary);transition:padding-left .25s ease,color .25s ease}
.contact-list li:hover{padding-left:6px;color:var(--text)}
.contact-list strong{color:var(--heading)}
.map-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:12px}
.map-links a{
  background:var(--surface-alt);border:1px solid var(--border);border-radius:var(--radius-sm);padding:7px 12px;font-size:14px;color:var(--text-secondary);
  transition:transform .25s ease,color .25s ease,border-color .25s ease,box-shadow .25s ease
}
.map-links a:hover,.map-links a:focus{color:var(--brand-strong);border-color:var(--brand);transform:translateY(-2px);box-shadow:0 8px 18px rgba(29,78,216,.16);text-decoration:none}
blockquote.card{margin:0;border-left:4px solid var(--brand)}
blockquote.card p:first-child{font-style:italic;color:var(--text)}
footer.site-footer{
  background:var(--footer-bg);color:var(--footer-text);padding:46px 0 22px;margin-top:20px;position:relative;overflow:hidden
}
footer.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(700px 320px at 12% 0%,rgba(29,78,216,.28),transparent 62%),radial-gradient(600px 300px at 88% 100%,rgba(124,58,237,.22),transparent 62%)
}
footer.site-footer .container{position:relative;z-index:1}
footer.site-footer h3,footer.site-footer h4{color:var(--footer-text)}
footer.site-footer p,footer.site-footer li,footer.site-footer a{color:var(--footer-muted)}
footer.site-footer a:hover,footer.site-footer a:focus{color:#FFFFFF;text-decoration:none}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:24px}
.footer-grid ul li{transition:transform .25s ease}
.footer-grid ul li:hover{transform:translateX(4px)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.16);margin-top:26px;padding-top:18px;font-size:14px;color:var(--footer-muted);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap
}
.back-to-top{
  position:fixed;right:20px;bottom:24px;z-index:200;border:none;border-radius:50%;width:46px;height:46px;
  background:var(--banner-grad);color:#fff;font-size:18px;cursor:pointer;box-shadow:var(--shadow);display:none;
  transition:transform .3s ease,box-shadow .3s ease,filter .3s ease
}
.back-to-top.show{display:block;animation:fadeSlide .35s ease both}
.back-to-top:hover,.back-to-top:focus{transform:translateY(-4px) scale(1.06);box-shadow:var(--shadow-hover);filter:brightness(1.08);color:#fff}
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
.reveal.visible{opacity:1;transform:none}
.note{
  background:var(--surface-alt);border:1px solid var(--border);border-radius:var(--radius);padding:16px;color:var(--text-secondary);font-size:15px;
  transition:box-shadow .3s ease,border-color .3s ease
}
.note:hover{border-color:var(--brand);box-shadow:var(--shadow-hover)}
.note h4{margin-top:0}
.author-box{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.tag{
  display:inline-block;background:var(--brand-soft);color:var(--brand-strong);border-radius:999px;padding:4px 12px;font-size:13px;font-weight:700;margin:0 8px 8px 0;
  transition:transform .25s ease,box-shadow .25s ease
}
.tag:hover{transform:translateY(-2px);box-shadow:0 8px 18px rgba(29,78,216,.18)}
::selection{background:var(--brand);color:#fff}
:focus-visible{outline:3px solid var(--brand);outline-offset:2px;border-radius:6px}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--surface-alt)}
::-webkit-scrollbar-thumb{background:var(--brand);border-radius:999px;border:2px solid var(--surface-alt)}
::-webkit-scrollbar-thumb:hover{background:var(--brand-strong)}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}
@media (max-width:1024px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .banner-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  h1{font-size:30px}
}
@media (max-width:760px){
  body{font-size:15px}
  nav.main-nav{
    display:none;position:absolute;left:0;right:0;top:100%;
    background:var(--glass);
    -webkit-backdrop-filter:blur(16px) saturate(160%);
    backdrop-filter:blur(16px) saturate(160%);
    border-bottom:1px solid var(--border);padding:14px 20px;
    box-shadow:var(--shadow)
  }
  nav.main-nav.open{display:block;animation:fadeSlide .3s ease both}
  nav.main-nav ul{flex-direction:column;gap:12px}
  .menu-toggle{display:inline-block}
  .search-box input{width:110px}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .article-item{grid-template-columns:1fr}
  .article-item svg{width:100%;height:auto}
  .author-box{grid-template-columns:1fr}
  h1{font-size:26px}
  h2{font-size:22px}
  .banner-slide h1,.banner-slide h2{font-size:24px}
  .banner-slide{padding:38px 0}
  .banner-slides{min-height:auto}
  .footer-grid{grid-template-columns:1fr}
  section{padding:40px 0}
  .back-to-top{right:14px;bottom:18px;width:42px;height:42px}
}
@media (max-width:420px){
  .header-inner{flex-wrap:wrap}
  .header-tools{width:100%;justify-content:space-between}
  .search-box{flex:1}
  .search-box input{width:100%}
  .brand-slogan{display:none}
}