:root {
  --blue: #075ee8;
  --deep-blue: #031c55;
  --ink: #07101f;
  --muted: #687386;
  --line: #dce3ec;
  --paper: #f5f8fc;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: #fff; font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.site-header { position: fixed; z-index: 20; inset: 0 0 auto; height: 82px; padding: 0 clamp(24px, 6vw, 92px); display: flex; align-items: center; justify-content: space-between; background: rgba(255,255,255,.88); border-bottom: 1px solid rgba(5,45,110,.08); backdrop-filter: blur(18px); }
.brand img { width: 218px; }
.site-nav { display: flex; gap: clamp(25px, 3.5vw, 54px); font-size: 14px; }
.site-nav a { position: relative; padding: 31px 0; }
.site-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 22px; height: 2px; background: var(--blue); transition: right .25s; }
.site-nav a:hover::after { right: 0; }
.menu-button { display: none; border: 0; background: none; padding: 10px; }
.menu-button span { display: block; width: 24px; height: 2px; margin: 5px; background: var(--ink); }

.hero { min-height: 780px; height: 100vh; padding: 150px clamp(24px, 8vw, 130px) 80px; display: grid; grid-template-columns: 1.08fr .92fr; align-items: center; position: relative; overflow: hidden; background: linear-gradient(135deg, #f8fbff 0%, #fff 53%, #eef5ff 100%); }
.hero::before { content: ""; position: absolute; inset: 0; opacity: .32; background-image: linear-gradient(rgba(4,81,186,.07) 1px, transparent 1px), linear-gradient(90deg,rgba(4,81,186,.07) 1px, transparent 1px); background-size: 54px 54px; mask-image: linear-gradient(to right, transparent, black 48%, black); }
.hero-glow { position: absolute; border-radius: 50%; filter: blur(5px); }
.hero-glow-one { width: 520px; height: 520px; right: -150px; top: 5%; background: rgba(0,93,255,.09); }
.hero-glow-two { width: 300px; height: 300px; left: 38%; bottom: -170px; background: rgba(26,199,255,.12); }
.hero-content { z-index: 2; max-width: 750px; }
.eyebrow,.kicker { color: var(--blue); font-weight: 700; letter-spacing: .18em; font-size: 12px; }
.eyebrow { display: flex; align-items: center; gap: 12px; }
.eyebrow span { width: 34px; height: 2px; background: var(--blue); }
.hero h1 { margin: 26px 0 30px; font-size: clamp(56px, 6.8vw, 104px); line-height: 1.06; letter-spacing: -.055em; font-weight: 800; }
.hero h1 em { color: var(--blue); font-style: normal; }
.hero-copy { max-width: 610px; color: #536176; font-size: clamp(17px, 1.5vw, 21px); line-height: 1.9; }
.hero-actions { display: flex; align-items: center; gap: 35px; margin-top: 44px; }
.button { display: inline-flex; align-items: center; gap: 25px; padding: 16px 22px; border-radius: 4px; font-size: 14px; transition: transform .2s, box-shadow .2s; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: var(--blue); box-shadow: 0 14px 30px rgba(7,94,232,.2); }
.button-dark { color: #fff; background: var(--ink); }
.text-link { font-size: 14px; border-bottom: 1px solid var(--line); padding-bottom: 5px; }
.text-link span { margin-left: 10px; color: var(--blue); }
.hero-visual { position: relative; z-index: 1; width: min(38vw, 570px); aspect-ratio: 1; justify-self: center; }
.orbit { position: absolute; border: 1px solid rgba(7,94,232,.18); border-radius: 50%; inset: 7%; animation: spin 24s linear infinite; }
.orbit::after { content: ""; position: absolute; width: 10px; height: 10px; border-radius: 50%; background: var(--blue); left: 12%; top: 12%; box-shadow: 0 0 0 9px rgba(7,94,232,.1); }
.orbit-two { inset: 20%; border-style: dashed; animation-duration: 17s; animation-direction: reverse; }
.visual-core { position: absolute; inset: 29%; display: grid; place-items: center; align-content: center; gap: 10px; color: #fff; border-radius: 36% 64% 58% 42% / 44% 45% 55% 56%; background: linear-gradient(145deg, #0875ff, #0638c7); box-shadow: 0 30px 90px rgba(2,80,218,.3); animation: morph 8s ease-in-out infinite; }
.visual-core span { font: 800 clamp(60px, 7vw, 98px)/1 serif; }
.visual-core small { font-size: 9px; letter-spacing: .28em; }
.float-tag { position: absolute; padding: 11px 16px; color: #18416f; background: rgba(255,255,255,.85); box-shadow: 0 12px 35px rgba(31,65,111,.11); border: 1px solid #fff; backdrop-filter: blur(10px); border-radius: 99px; font-size: 12px; }
.tag-one { top: 18%; right: 2%; }.tag-two { bottom: 19%; left: 0; }.tag-three { right: 3%; bottom: 6%; }
.scroll-note { position: absolute; left: clamp(24px, 8vw, 130px); bottom: 28px; font-size: 9px; letter-spacing: .2em; color: #7f8b9c; display: flex; gap: 12px; align-items: center; }
.scroll-note span { width: 60px; height: 1px; background: #aab4c2; }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes morph { 50% { border-radius: 54% 46% 38% 62% / 52% 59% 41% 48%; transform: translateY(-8px); } }

.section { position: relative; padding: 120px clamp(24px, 8vw, 130px); }
.section-number { position: absolute; right: clamp(24px, 8vw, 130px); top: 106px; color: #c7d1dd; font: 500 12px/1 monospace; }
.section-number.light { color: rgba(255,255,255,.35); }
.section-heading h2,.services-head h2,.ai-copy h2,.contact h2 { margin: 14px 0 0; font-size: clamp(35px, 4vw, 59px); line-height: 1.24; letter-spacing: -.04em; }
.intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(50px, 10vw, 170px); margin: 90px 0 80px; }
.intro-lead p { margin: 0; font-size: clamp(23px, 2.3vw, 34px); font-weight: 600; line-height: 1.75; }
.intro-detail { border-left: 1px solid var(--line); padding-left: clamp(30px, 5vw, 80px); color: var(--muted); font-size: 16px; line-height: 2; }
.intro-detail p:first-child { margin-top: 0; }
.audience-strip { display: flex; gap: clamp(12px, 2vw, 30px); flex-wrap: wrap; align-items: center; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 28px 0; }
.audience-strip span { color: var(--muted); font-size: 12px; margin-right: auto; }.audience-strip strong { font-size: 14px; }.audience-strip i { width: 4px; height: 4px; border-radius: 50%; background: var(--blue); }

.services { color: #fff; background: #06142d; overflow: hidden; }
.services::before { content: "FANGHUAN"; position: absolute; color: rgba(255,255,255,.025); right: -30px; top: 0; font-size: 18vw; font-weight: 900; }
.kicker.light { color: #6da7ff; }
.services-head { position: relative; display: flex; justify-content: space-between; align-items: end; gap: 40px; }
.services-head > p { max-width: 480px; margin: 0; color: #9aa7ba; line-height: 1.9; }
.service-list { position: relative; display: grid; grid-template-columns: repeat(4,1fr); margin-top: 70px; border-top: 1px solid rgba(255,255,255,.15); border-bottom: 1px solid rgba(255,255,255,.15); }
.service-card { min-height: 440px; padding: 30px; border-right: 1px solid rgba(255,255,255,.15); transition: background .3s, transform .3s; }
.service-card:first-child { border-left: 1px solid rgba(255,255,255,.15); }
.service-card:hover { background: rgba(255,255,255,.05); transform: translateY(-6px); }
.service-card.accent { background: var(--blue); }
.service-index { color: #6f7e94; font: 11px monospace; }.accent .service-index { color: #bdd5ff; }
.service-icon { margin: 55px 0 28px; color: #68a2ff; font-size: 36px; }.accent .service-icon { color: #fff; }
.service-card h3 { font-size: 25px; line-height: 1.45; margin: 0 0 20px; }
.service-card p { min-height: 95px; color: #9aa7ba; font-size: 14px; line-height: 1.8; }.accent p { color: #dfebff; }
.service-tags { display: flex; gap: 7px; flex-wrap: wrap; }.service-tags span { padding: 5px 9px; color: #8fa0b8; border: 1px solid rgba(255,255,255,.16); border-radius: 99px; font-size: 10px; }.accent .service-tags span { color: #fff; }

.ai-section { background: #eef4fb; }
.ai-panel { display: grid; grid-template-columns: 1fr 1fr; align-items: center; min-height: 600px; background: #fff; box-shadow: 0 30px 80px rgba(23,63,110,.08); overflow: hidden; }
.ai-copy { padding: clamp(40px, 7vw, 100px); }
.ai-lead { font-size: 18px; color: #43536a; line-height: 1.9; margin: 28px 0 14px; }
.ai-note { color: #9aa4b3; font-size: 12px; line-height: 1.8; margin-bottom: 35px; }
.ai-demo { margin: 70px 70px 70px 0; min-height: 440px; padding: 26px; border-radius: 20px; color: #d7e4f8; background: linear-gradient(155deg, #071b40, #082b68); box-shadow: 0 35px 60px rgba(7,45,108,.22); transform: rotate(1.5deg); }
.demo-top { display: flex; align-items: center; gap: 9px; border-bottom: 1px solid rgba(255,255,255,.1); padding-bottom: 20px; font-size: 13px; }.demo-top span { width: 10px; height: 10px; border-radius: 50%; background: #43d19e; }.demo-top i { margin-left: auto; color: #5edeb0; font-size: 10px; font-style: normal; }
.chat-row { display: flex; gap: 10px; margin-top: 28px; align-items: flex-start; }.chat-row p { margin: 0; padding: 13px 15px; border-radius: 4px 14px 14px 14px; background: rgba(255,255,255,.1); font-size: 12px; line-height: 1.7; }.chat-row.user { justify-content: flex-end; }.chat-row.user p { color: white; background: #096af0; border-radius: 14px 4px 14px 14px; }
.avatar { width: 32px; height: 32px; flex: 0 0 32px; display: grid; place-items: center; border-radius: 9px; background: #096af0; color: #fff; font-weight: 700; }
.typing { margin: 22px 0 70px 42px; display: flex; gap: 4px; }.typing span { width: 5px; height: 5px; border-radius: 50%; background: #6f87ad; }
.demo-input { display: flex; align-items: center; justify-content: space-between; border: 1px solid rgba(255,255,255,.14); border-radius: 10px; padding: 10px 12px; color: #7187a8; font-size: 11px; }.demo-input b { display: grid; place-items: center; width: 28px; height: 28px; border-radius: 7px; color: white; background: #096af0; }

.contact { min-height: 600px; color: #fff; background: linear-gradient(120deg,#084ebd,#072c70); display: grid; grid-template-columns: 1fr minmax(360px, .7fr); gap: 90px; align-items: center; }
.contact::before { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 75% 20%,rgba(54,158,255,.35),transparent 35%); }
.contact-copy,.contact-card { position: relative; }
.contact-card { padding: 45px; color: var(--ink); background: #fff; box-shadow: 0 24px 70px rgba(0,18,52,.22); }
.contact-card > p { color: var(--blue); font-size: 12px; font-weight: 700; letter-spacing: .12em; }.contact-card h3 { margin: 12px 0 30px; font-size: 25px; }
.contact-card dl { margin: 0; }.contact-card dl div { display: grid; grid-template-columns: 62px 1fr; padding: 14px 0; border-top: 1px solid var(--line); font-size: 13px; }.contact-card dt { color: #919aa9; }.contact-card dd { margin: 0; }

footer { padding: 45px clamp(24px, 8vw, 130px); display: flex; justify-content: space-between; align-items: end; border-top: 1px solid var(--line); }
.footer-brand img { width: 185px; }.footer-brand p,.footer-meta { color: #8a94a3; font-size: 11px; }.footer-meta { text-align: right; }
.icp-link { transition: color .2s; }
.icp-link:hover,.icp-link:focus-visible { color: var(--blue); text-decoration: underline; text-underline-offset: 3px; }
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 900px) {
  .site-header { height: 70px; }.brand img { width: 180px; }.menu-button { display: block; }.site-nav { position: absolute; display: none; top: 70px; left: 0; right: 0; padding: 18px 24px 25px; flex-direction: column; gap: 0; background: white; box-shadow: 0 18px 30px rgba(20,40,70,.1); }.site-nav.open { display: flex; }.site-nav a { padding: 12px 0; }.site-nav a::after { display: none; }
  .hero { min-height: 850px; height: auto; grid-template-columns: 1fr; padding-top: 130px; }.hero-visual { width: min(75vw,430px); margin-top: 25px; }.scroll-note { display: none; }
  .intro-grid,.ai-panel,.contact { grid-template-columns: 1fr; }.intro-grid { gap: 35px; margin-top: 55px; }.intro-detail { padding: 30px 0 0; border-left: 0; border-top: 1px solid var(--line); }
  .services-head { align-items: start; flex-direction: column; }.service-list { grid-template-columns: 1fr 1fr; }.service-card:nth-child(3) { border-left: 1px solid rgba(255,255,255,.15); }
  .ai-demo { margin: 0 35px 45px; }.contact { gap: 50px; }.footer-meta { text-align: left; }
}
@media (max-width: 560px) {
  .section { padding-top: 85px; padding-bottom: 85px; }.section-number { top: 78px; }.hero { min-height: 760px; }.hero h1 { font-size: 49px; }.hero-actions { align-items: flex-start; flex-direction: column; gap: 22px; }.hero-visual { width: 90vw; margin-left: -5vw; }.float-tag { font-size: 10px; }
  .audience-strip span { flex: 0 0 100%; }.service-list { grid-template-columns: 1fr; }.service-card { min-height: 370px; border-left: 1px solid rgba(255,255,255,.15); }.service-card p { min-height: auto; }.service-icon { margin-top: 35px; }
  .ai-copy { padding: 38px 25px; }.ai-demo { min-height: 390px; margin: 0 15px 20px; padding: 20px; }.contact { grid-template-columns: 1fr; }.contact-card { padding: 30px 22px; }.contact-card dl div { grid-template-columns: 55px 1fr; }.contact h2 { font-size: 38px; }
  footer { align-items: start; flex-direction: column; gap: 25px; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *,*::before,*::after { animation: none !important; transition: none !important; } .reveal { opacity: 1; transform: none; } }