:root{
  --brand:#e8532a;
  --brand2:#2a6de8;
  --brand3:#8b5cf6;
  --brand-grad:linear-gradient(135deg,#e8532a 0%,#f28c3a 45%,#2a6de8 100%);
  --brand-grad-soft:linear-gradient(135deg,rgba(232,83,42,.12),rgba(42,109,232,.12));
  --bg:#ffffff;
  --bg-soft:#f7f8fa;
  --fg:#1f2328;
  --fg-strong:#0f1318;
  --muted:#5b6470;
  --card:rgba(246,248,250,.72);
  --card-solid:#f6f8fa;
  --line:rgba(229,232,236,.9);
  --glass:rgba(255,255,255,.65);
  --glass-border:rgba(255,255,255,.55);
  --shadow-sm:0 1px 2px rgba(15,19,24,.05),0 2px 8px rgba(15,19,24,.05);
  --shadow-md:0 4px 12px rgba(15,19,24,.07),0 12px 32px rgba(15,19,24,.08);
  --shadow-lg:0 10px 30px rgba(15,19,24,.10),0 24px 60px rgba(15,19,24,.12);
  --radius-sm:8px;
  --radius:12px;
  --radius-lg:16px;
  --radius-xl:22px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
html[data-theme="dark"]{
  --bg:#0f1216;
  --bg-soft:#141920;
  --fg:#e6e9ee;
  --fg-strong:#f5f7fa;
  --muted:#9aa4b2;
  --card:rgba(27,32,39,.72);
  --card-solid:#1b2027;
  --line:rgba(42,49,58,.9);
  --glass:rgba(23,28,35,.62);
  --glass-border:rgba(255,255,255,.08);
  --shadow-sm:0 1px 2px rgba(0,0,0,.35),0 2px 8px rgba(0,0,0,.3);
  --shadow-md:0 4px 12px rgba(0,0,0,.4),0 12px 32px rgba(0,0,0,.35);
  --shadow-lg:0 10px 30px rgba(0,0,0,.45),0 24px 60px rgba(0,0,0,.5);
  --brand-grad-soft:linear-gradient(135deg,rgba(232,83,42,.18),rgba(42,109,232,.18));
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",Roboto,sans-serif;
  background:var(--bg);
  color:var(--fg);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
  transition:background-color .35s var(--ease),color .35s var(--ease);
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background:
    radial-gradient(900px 520px at 12% -8%,rgba(232,83,42,.10),transparent 60%),
    radial-gradient(820px 480px at 92% 4%,rgba(42,109,232,.10),transparent 62%),
    radial-gradient(700px 420px at 50% 108%,rgba(139,92,246,.08),transparent 60%);
}
a{color:var(--brand);text-decoration:none;transition:color .25s var(--ease),opacity .25s var(--ease)}
a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:2px;
  border-radius:6px;
}
img,svg{max-width:100%;display:block}
::selection{background:rgba(232,83,42,.22);color:var(--fg-strong)}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}

header.site{
  position:sticky;
  top:0;
  z-index:100;
  background:var(--glass);
  border-bottom:1px solid var(--line);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  backdrop-filter:saturate(180%) blur(14px);
  transition:background-color .35s var(--ease),border-color .35s var(--ease),box-shadow .35s var(--ease);
}
header.site:hover{box-shadow:var(--shadow-sm)}
header.site .bar{display:flex;align-items:center;gap:16px;height:64px}
.logo{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:800;
  font-size:18px;
  letter-spacing:.2px;
  color:var(--fg-strong);
  text-decoration:none;
  transition:transform .3s var(--ease);
}
.logo:hover{text-decoration:none;transform:translateY(-1px)}
.logo .mark{
  width:34px;
  height:34px;
  border-radius:10px;
  background:var(--brand-grad);
  display:flex;
  align-items:center;
  justify-content:center;
  color:#fff;
  font-size:16px;
  font-weight:700;
  box-shadow:0 6px 16px rgba(232,83,42,.32);
  transition:transform .4s var(--ease),box-shadow .4s var(--ease);
}
.logo:hover .mark{transform:rotate(-8deg) scale(1.06);box-shadow:0 10px 22px rgba(232,83,42,.42)}
nav.main{display:flex;gap:6px;flex-wrap:wrap;margin-left:auto;font-size:15px}
nav.main a{
  color:var(--fg);
  padding:6px 10px;
  border-radius:8px;
  position:relative;
  transition:color .25s var(--ease),background-color .25s var(--ease);
}
nav.main a::after{
  content:"";
  position:absolute;
  left:10px;
  right:10px;
  bottom:2px;
  height:2px;
  border-radius:2px;
  background:var(--brand-grad);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .3s var(--ease);
}
nav.main a:hover{color:var(--brand);background:var(--brand-grad-soft);text-decoration:none}
nav.main a:hover::after{transform:scaleX(1)}
.tools{display:flex;gap:8px;align-items:center;margin-left:12px}
.btn{
  border:1px solid var(--line);
  background:var(--card);
  color:var(--fg);
  border-radius:9px;
  padding:6px 12px;
  font-size:14px;
  font-family:inherit;
  cursor:pointer;
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  transition:border-color .25s var(--ease),color .25s var(--ease),background-color .25s var(--ease),transform .2s var(--ease),box-shadow .25s var(--ease);
}
.btn:hover{
  border-color:var(--brand);
  color:var(--brand);
  background:var(--brand-grad-soft);
  transform:translateY(-1px);
  box-shadow:var(--shadow-sm);
}
.btn:active{transform:translateY(0) scale(.98)}
.searchbox{display:flex;gap:6px}
.searchbox input{
  border:1px solid var(--line);
  background:var(--card);
  color:var(--fg);
  border-radius:9px;
  padding:6px 12px;
  font-size:14px;
  font-family:inherit;
  width:160px;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease),width .3s var(--ease),background-color .25s var(--ease);
}
.searchbox input::placeholder{color:var(--muted)}
.searchbox input:focus{
  outline:none;
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(232,83,42,.16);
  width:200px;
  background:var(--bg);
}

section{padding:44px 0;border-top:1px solid var(--line);position:relative}
.hero{
  padding:56px 0 34px;
  border-top:0;
  background:
    radial-gradient(760px 380px at 8% 0%,rgba(232,83,42,.16),transparent 62%),
    radial-gradient(700px 360px at 92% 12%,rgba(42,109,232,.16),transparent 64%),
    linear-gradient(180deg,var(--bg-soft),transparent 88%);
  overflow:hidden;
}
.hero::after{
  content:"";
  position:absolute;
  inset:auto -10% -60% -10%;
  height:220px;
  background:radial-gradient(closest-side,rgba(139,92,246,.10),transparent);
  pointer-events:none;
}
.hero h1{
  font-size:34px;
  line-height:1.3;
  font-weight:800;
  letter-spacing:-.4px;
  margin-bottom:16px;
  color:var(--fg-strong);
  background:linear-gradient(120deg,var(--fg-strong) 30%,var(--brand) 70%,var(--brand2) 100%);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}
.hero p.lead{color:var(--muted);font-size:17px;max-width:920px}
.hero .cta{display:flex;gap:12px;margin-top:22px;flex-wrap:wrap}
.hero .cta a{
  padding:11px 20px;
  border-radius:11px;
  font-weight:600;
  font-size:15px;
  transition:transform .25s var(--ease),box-shadow .3s var(--ease),background-color .25s var(--ease),border-color .25s var(--ease);
}
.hero .cta a:hover{text-decoration:none;transform:translateY(-2px)}
.hero .cta a.primary{
  background:var(--brand-grad);
  color:#fff;
  box-shadow:0 8px 20px rgba(232,83,42,.32);
}
.hero .cta a.primary:hover{box-shadow:0 12px 28px rgba(232,83,42,.42)}
.hero .cta a.ghost{
  border:1px solid var(--line);
  color:var(--fg);
  background:var(--glass);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
}
.hero .cta a.ghost:hover{border-color:var(--brand);color:var(--brand);box-shadow:var(--shadow-sm)}

.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:28px 0 4px}
.stat{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:18px;
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  box-shadow:var(--shadow-sm);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
  position:relative;
  overflow:hidden;
}
.stat::before{
  content:"";
  position:absolute;
  inset:0 auto 0 0;
  width:3px;
  background:var(--brand-grad);
  opacity:.85;
}
.stat:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:rgba(232,83,42,.4)}
.stat b{font-size:26px;color:var(--brand);font-variant-numeric:tabular-nums;letter-spacing:-.5px}
.stat span{display:block;color:var(--muted);font-size:14px;margin-top:2px}

h2{
  font-size:25px;
  font-weight:800;
  letter-spacing:-.3px;
  margin-bottom:14px;
  color:var(--fg-strong);
  position:relative;
  padding-left:14px;
}
h2::before{
  content:"";
  position:absolute;
  left:0;
  top:.28em;
  bottom:.28em;
  width:4px;
  border-radius:4px;
  background:var(--brand-grad);
}
h3{font-size:19px;font-weight:700;margin:22px 0 10px;color:var(--fg-strong);letter-spacing:-.2px}
h4{font-size:16px;font-weight:700;margin:14px 0 8px;color:var(--fg-strong)}
p{margin-bottom:12px;color:var(--fg)}
.muted{color:var(--muted)}

.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:18px;
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  box-shadow:var(--shadow-sm);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease),background-color .3s var(--ease);
  position:relative;
}
.card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-md);
  border-color:rgba(232,83,42,.35);
}
.card h3{margin-top:0}
.card p:last-child{margin-bottom:0}

ul.list{padding-left:20px;margin-bottom:12px}
ul.list li{margin-bottom:6px;color:var(--fg)}
ul.list li::marker{color:var(--brand)}
ol.steps{padding-left:22px;counter-reset:step}
ol.steps li{margin-bottom:12px;color:var(--fg)}
ol.steps li::marker{color:var(--brand);font-weight:700}

.crumb{font-size:14px;color:var(--muted);padding:14px 0}
.crumb a{color:var(--muted);transition:color .25s var(--ease)}
.crumb a:hover{color:var(--brand)}

.banner{
  position:relative;
  overflow:hidden;
  border-radius:var(--radius-xl);
  border:1px solid var(--line);
  background:var(--glass);
  -webkit-backdrop-filter:blur(16px) saturate(160%);
  backdrop-filter:blur(16px) saturate(160%);
  box-shadow:var(--shadow-md);
  margin-top:8px;
}
.banner::before{
  content:"";
  position:absolute;
  inset:0;
  background:var(--brand-grad-soft);
  opacity:.6;
  pointer-events:none;
}
.slides{display:flex;transition:transform .55s var(--ease);position:relative;z-index:1}
.slide{min-width:100%;padding:28px;display:flex;gap:20px;align-items:center}
.slide .txt{flex:1}
.slide h3{margin:0 0 8px;font-size:20px}
.slide .pic{width:180px;flex:0 0 180px;transition:transform .4s var(--ease)}
.slide .pic svg{border-radius:var(--radius)}
.slide:hover .pic{transform:scale(1.04) rotate(-1deg)}
.dots{display:flex;gap:8px;justify-content:center;padding:12px;position:relative;z-index:1}
.dot{
  width:9px;
  height:9px;
  border-radius:50%;
  background:var(--line);
  border:0;
  cursor:pointer;
  padding:0;
  transition:background-color .3s var(--ease),transform .3s var(--ease),width .3s var(--ease);
}
.dot:hover{transform:scale(1.25);background:var(--muted)}
.dot.on{background:var(--brand-grad);width:22px;border-radius:5px}

.faq details{
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:12px 16px;
  margin-bottom:10px;
  background:var(--card);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  transition:border-color .3s var(--ease),box-shadow .3s var(--ease),background-color .3s var(--ease);
}
.faq details:hover{border-color:rgba(232,83,42,.35);box-shadow:var(--shadow-sm)}
.faq details[open]{border-color:rgba(232,83,42,.45);box-shadow:var(--shadow-sm)}
.faq summary{
  cursor:pointer;
  font-weight:600;
  color:var(--fg-strong);
  list-style:none;
  display:flex;
  align-items:center;
  gap:10px;
  transition:color .25s var(--ease);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{
  content:"+";
  flex:0 0 auto;
  width:20px;
  height:20px;
  border-radius:50%;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:15px;
  line-height:1;
  color:#fff;
  background:var(--brand-grad);
  transition:transform .3s var(--ease);
}
.faq details[open] summary::before{transform:rotate(45deg)}
.faq details[open] summary{color:var(--brand)}
.faq details p{margin:10px 0 2px;color:var(--fg)}

.articles{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.article{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:18px;
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  box-shadow:var(--shadow-sm);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
  position:relative;
  overflow:hidden;
}
.article::after{
  content:"";
  position:absolute;
  inset:auto 0 0 0;
  height:3px;
  background:var(--brand-grad);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .4s var(--ease);
}
.article:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(232,83,42,.35)}
.article:hover::after{transform:scaleX(1)}
.article .meta{font-size:13px;color:var(--muted);margin-bottom:6px;letter-spacing:.2px}
.article h3{font-size:17px;margin:0 0 8px;transition:color .25s var(--ease)}
.article:hover h3{color:var(--brand)}
.article .more{font-size:14px;font-weight:600;display:inline-block;transition:transform .25s var(--ease)}
.article .more:hover{transform:translateX(3px);text-decoration:none}

.linklist{display:flex;flex-wrap:wrap;gap:10px}
.linklist a{
  padding:7px 12px;
  border:1px solid var(--line);
  border-radius:9px;
  background:var(--card);
  font-size:14px;
  color:var(--fg);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  transition:border-color .25s var(--ease),color .25s var(--ease),transform .25s var(--ease),box-shadow .25s var(--ease),background-color .25s var(--ease);
}
.linklist a:hover{
  border-color:var(--brand);
  color:var(--brand);
  text-decoration:none;
  transform:translateY(-2px);
  box-shadow:var(--shadow-sm);
  background:var(--brand-grad-soft);
}

footer.site{
  border-top:1px solid var(--line);
  padding:36px 0 28px;
  background:var(--bg-soft);
  position:relative;
}
footer.site::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:2px;
  background:var(--brand-grad);
  opacity:.7;
}
footer.site .cols{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
footer.site h4{margin-top:0;color:var(--fg-strong);font-size:15px}
footer.site p,footer.site a{font-size:14px;color:var(--muted)}
footer.site a{transition:color .25s var(--ease),transform .25s var(--ease);display:inline-block}
footer.site a:hover{color:var(--brand);text-decoration:none;transform:translateX(2px)}
.copyright{
  border-top:1px solid var(--line);
  margin-top:22px;
  padding-top:16px;
  font-size:13px;
  color:var(--muted);
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:10px;
}

#toTop{
  position:fixed;
  right:20px;
  bottom:24px;
  width:46px;
  height:46px;
  border-radius:50%;
  background:var(--brand-grad);
  color:#fff;
  border:0;
  font-size:18px;
  cursor:pointer;
  display:none;
  z-index:200;
  box-shadow:0 8px 22px rgba(232,83,42,.38);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),opacity .25s var(--ease);
}
#toTop:hover{transform:translateY(-3px) scale(1.05);box-shadow:0 12px 28px rgba(232,83,42,.48)}
#toTop:active{transform:scale(.96)}

.reveal{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .7s var(--ease),transform .7s var(--ease);
  will-change:opacity,transform;
}
.reveal.in{opacity:1;transform:none}
.tag{
  display:inline-block;
  font-size:12px;
  color:var(--brand);
  border:1px solid var(--brand);
  border-radius:20px;
  padding:1px 9px;
  margin-right:6px;
  background:rgba(232,83,42,.06);
}

@media(max-width:1024px){
  .hero h1{font-size:30px}
  .searchbox input{width:130px}
  .searchbox input:focus{width:160px}
}
@media(max-width:860px){
  .grid3,.grid2,.articles,.stats,footer.site .cols{grid-template-columns:1fr}
  nav.main{
    display:none;
    position:absolute;
    top:64px;
    left:0;
    right:0;
    background:var(--glass);
    border-bottom:1px solid var(--line);
    padding:14px 20px;
    flex-direction:column;
    gap:4px;
    -webkit-backdrop-filter:blur(16px) saturate(160%);
    backdrop-filter:blur(16px) saturate(160%);
    box-shadow:var(--shadow-md);
    animation:menuIn .3s var(--ease);
  }
  nav.main.open{display:flex}
  nav.main a{padding:10px 12px}
  nav.main a::after{display:none}
  .slide{flex-direction:column;padding:22px}
  .slide .pic{width:120px;flex:0 0 120px}
  .hero{padding:40px 0 26px}
  .hero h1{font-size:23px}
  .hero p.lead{font-size:16px}
  section{padding:34px 0}
  h2{font-size:21px}
  h3{font-size:18px}
  .tools{gap:6px}
  .searchbox{display:none}
  .stat b{font-size:23px}
  .stat{padding:16px}
}
@media(max-width:520px){
  .wrap{padding:0 16px}
  header.site .bar{height:58px;gap:10px}
  .logo{font-size:15px}
  .logo .mark{width:30px;height:30px;border-radius:9px;font-size:14px}
  .hero h1{font-size:21px}
  .hero .cta{flex-direction:column}
  .hero .cta a{text-align:center}
  .slide h3{font-size:17px}
  .card,.article{padding:15px}
  .copyright{flex-direction:column}
  #toTop{right:14px;bottom:16px;width:42px;height:42px}
}
@keyframes menuIn{
  from{opacity:0;transform:translateY(-8px)}
  to{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;
  }
  .reveal{opacity:1;transform:none}
}
@media print{
  header.site,footer.site,#toTop,.banner,.dots,nav.main,.tools{display:none !important}
  body{background:#fff;color:#000}
  section{border-top:1px solid #ddd;page-break-inside:avoid}
  a{color:#000;text-decoration:underline}
}