:root{
  color-scheme: light dark;
  --bg:#fbfaf6;
  --fg:#11110f;
  --muted:#77766f;
  --line:#e6e2d8;
  --panel:#fffef9;
  --accent:#315b46;
  --shadow:0 28px 90px rgba(20,18,13,.08);
}
@media (prefers-color-scheme: dark){
  :root{
    --bg:#0d0d0b;
    --fg:#f3efe4;
    --muted:#a39f94;
    --line:#28261f;
    --panel:#141411;
    --accent:#9fc8ad;
    --shadow:0 28px 90px rgba(0,0,0,.42);
  }
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--fg);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;
  line-height:1.7;
}
a{color:inherit;text-decoration:none}
a:hover{text-decoration:none}
html[lang="en"] .zh-only{display:none!important}
html[lang="zh-CN"] .en-only{display:none!important}

.intro-screen{
  position:fixed;
  inset:0;
  z-index:999;
  display:flex;
  flex-direction:row;
  justify-content:center;
  align-items:center;
  gap:.3em;
  width:100%;
  min-height:100vh;
  padding:24px;
  border:0;
  background:#fff;
  color:#111;
  font:inherit;
  cursor:pointer;
  opacity:1;
  overflow:hidden;
  transition:opacity .42s ease,visibility .42s ease;
}
.intro-word{
  display:flex;
  font-family:"PingFang SC","PingFang TC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
  font-size:13px;
  line-height:1.4;
  font-style:normal;
  font-weight:400;
  letter-spacing:0;
  text-transform:none;
  white-space:nowrap;
}
.intro-letter{
  display:inline-block;
  opacity:0;
  transition:opacity .12s linear;
}
.intro-letter.is-visible{
  opacity:1;
}
.intro-screen.is-hidden{
  visibility:hidden;
  pointer-events:none;
  opacity:0;
}
@media (prefers-reduced-motion:reduce){
  .intro-letter{transition:none}
}

.site-header{
  position:sticky;
  top:0;
  z-index:10;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  padding:26px clamp(28px,6vw,96px);
  background:color-mix(in srgb,var(--bg) 86%,transparent);
  border-bottom:1px solid color-mix(in srgb,var(--line) 68%,transparent);
  backdrop-filter:blur(18px);
}
.brand{
  display:flex;
  align-items:baseline;
  gap:10px;
  font-weight:760;
}
.brand span{font-size:15px}
.brand small{font-size:12px;color:var(--muted);font-weight:650}
.nav-wrap{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:24px;
  flex-wrap:wrap;
}
nav{display:flex;gap:24px;flex-wrap:wrap;color:var(--muted);font-size:14px}
nav a{transition:color .18s ease}
nav a:hover,nav a[aria-current="page"]{color:var(--fg)}
.lang-toggle{
  display:inline-flex;
  align-items:center;
  gap:6px;
  min-height:36px;
  padding:4px 8px;
  border:1px solid var(--line);
  border-radius:999px;
  background:transparent;
  color:var(--muted);
  font:inherit;
  font-size:13px;
  cursor:pointer;
}
.lang-toggle span{padding:2px 7px;border-radius:999px}
html[lang="en"] .lang-toggle .en-label,
html[lang="zh-CN"] .lang-toggle .zh-label{background:var(--fg);color:var(--bg)}

.hero,.section,.footer,.page-hero{
  max-width:1360px;
  margin:0 auto;
  padding-left:clamp(28px,7vw,116px);
  padding-right:clamp(28px,7vw,116px);
}
.hero{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(260px,360px);
  gap:clamp(80px,12vw,180px);
  align-items:end;
  min-height:calc(100vh - 90px);
  padding-top:clamp(96px,16vh,180px);
  padding-bottom:clamp(72px,12vh,138px);
}
.hero-copy{max-width:760px}
.eyebrow{
  margin:0 0 30px;
  color:var(--accent);
  font-size:12px;
  font-weight:760;
  letter-spacing:.08em;
  text-transform:uppercase;
}
h1,h2,h3,p{margin-top:0}
h1{
  max-width:820px;
  margin:0;
  font-family:Georgia,"Times New Roman","Songti SC",serif;
  font-size:clamp(58px,8vw,112px);
  font-weight:400;
  line-height:.98;
  letter-spacing:0;
}
h2{
  max-width:860px;
  margin:0;
  font-family:Georgia,"Times New Roman","Songti SC",serif;
  font-size:clamp(34px,5vw,62px);
  font-weight:400;
  line-height:1.08;
  letter-spacing:0;
}
h3{margin:0 0 12px;font-size:21px;line-height:1.35}
.lead{
  max-width:560px;
  margin:42px 0 0;
  color:var(--muted);
  font-size:clamp(16px,1.4vw,19px);
  line-height:2;
}
.hero-actions,.page-links{
  display:flex;
  flex-wrap:wrap;
  gap:18px;
  margin-top:46px;
}
.button{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:42px;
  padding:0 0 5px;
  border:0;
  border-bottom:1px solid currentColor;
  border-radius:0;
  background:transparent;
  color:var(--fg);
  font-weight:720;
  transition:color .18s ease,transform .18s ease;
}
.button:hover{color:var(--accent);transform:translateY(-1px)}
.button.primary{color:var(--fg)}

.hero-panel{
  display:grid;
  gap:34px;
  align-self:center;
}
.hero-panel img{
  width:min(100%,320px);
  justify-self:end;
  aspect-ratio:4/5;
  object-fit:cover;
  border-radius:2px;
  border:1px solid var(--line);
  filter:grayscale(1) contrast(1.02);
  box-shadow:var(--shadow);
}
.section{
  padding-top:clamp(110px,16vw,210px);
  padding-bottom:clamp(110px,16vw,210px);
  border-top:1px solid var(--line);
}
.section-title{max-width:860px;margin-bottom:46px}
.section-title h2{margin-bottom:20px}
.section-title p,.profile p,.ai-layout p,.capability-grid p,.case-card p{color:var(--muted)}
.profile{max-width:1080px}
.profile p{
  max-width:680px;
  font-size:clamp(17px,1.8vw,22px);
  line-height:2;
}
.capability-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:44px;
}
.capability-grid article{
  min-height:260px;
  padding-top:28px;
  border-top:1px solid var(--line);
}
.capability-grid span{
  display:block;
  margin-bottom:28px;
  color:var(--accent);
  font-size:12px;
  font-weight:760;
}
.case-list{display:grid;gap:54px}
.case-card{
  max-width:960px;
  padding:44px 0 0;
  border-top:1px solid var(--line);
}
.case-meta{margin-bottom:20px;color:var(--muted);font-size:13px}
.case-card ul{margin:24px 0 0;padding-left:20px}
.case-card li{margin:9px 0;color:var(--fg)}
.ai-layout{
  display:grid;
  grid-template-columns:minmax(0,.8fr) minmax(0,1.1fr);
  gap:clamp(56px,9vw,130px);
  align-items:start;
}
.tool-cloud{display:flex;flex-wrap:wrap;gap:12px}
.tool-cloud span{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  padding:8px 13px;
  border:1px solid var(--line);
  border-radius:999px;
  background:transparent;
  font-size:14px;
  font-weight:650;
}
.page-hero{
  padding-top:clamp(110px,16vh,190px);
  padding-bottom:clamp(82px,12vh,150px);
}
.page-hero h1{max-width:980px}
.page-hero .lead{max-width:720px}

.footer{
  display:flex;
  justify-content:space-between;
  gap:44px;
  padding-top:48px;
  padding-bottom:54px;
  border-top:1px solid var(--line);
  color:var(--muted);
}
.footer strong{display:block;color:var(--fg);font-size:17px}
.footer p{margin:8px 0 0}
address{font-style:normal;text-align:right}

@media(max-width:900px){
  .site-header{position:relative;align-items:flex-start;flex-direction:column;gap:18px}
  .nav-wrap{justify-content:flex-start}
  .hero,.ai-layout{grid-template-columns:1fr}
  .hero{min-height:auto;align-items:start}
  .hero-panel{max-width:420px}
  .hero-panel img{justify-self:start}
  .capability-grid{grid-template-columns:1fr;gap:38px}
  .footer{flex-direction:column}
  address{text-align:left}
}
@media(max-width:560px){
  .site-header{padding:20px 22px}
  nav{gap:14px;font-size:13px}
  .nav-wrap{gap:14px}
  .hero,.section,.footer,.page-hero{padding-left:22px;padding-right:22px}
  .hero{padding-top:78px;padding-bottom:88px;gap:58px}
  h1{font-size:44px;line-height:1.04}
  h2{font-size:34px}
  .lead{font-size:16px;line-height:1.9}
  .hero-actions,.page-links{gap:14px}
  .button{width:auto}
  .section{padding-top:86px;padding-bottom:86px}
  .page-hero{padding-top:76px;padding-bottom:70px}
}