:root {
  --ink: #071c25;
  --ink-soft: #153842;
  --teal: #0d7b72;
  --teal-light: #61d6c9;
  --mint: #dff7f1;
  --gold: #c99a4a;
  --cream: #f7f5ef;
  --paper: #fcfdfb;
  --line: rgba(7, 28, 37, 0.12);
  --muted: #63757a;
  --shadow: 0 24px 70px rgba(7, 28, 37, 0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.section-shell { width: min(1180px, calc(100% - 48px)); margin-inline: auto; }
.section-space { padding-block: 116px; }

.site-header {
  position: fixed;
  z-index: 50;
  top: 18px;
  left: 50%;
  width: min(1180px, calc(100% - 48px));
  height: 70px;
  padding: 0 14px 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transform: translateX(-50%);
  border: 1px solid rgba(255, 255, 255, 0.45);
  border-radius: 18px;
  background: rgba(252, 253, 251, 0.84);
  box-shadow: 0 12px 40px rgba(7, 28, 37, 0.08);
  backdrop-filter: blur(18px);
  transition: top .25s ease, box-shadow .25s ease;
}
.site-header.scrolled { top: 8px; box-shadow: 0 14px 44px rgba(7, 28, 37, 0.14); }
.brand { display: inline-flex; align-items: center; gap: 11px; }
.brand-mark { width: 38px; height: 38px; flex: 0 0 auto; display: block; }
.brand-mark img { width: 100%; height: 100%; display: block; }
.brand-copy { display: grid; line-height: 1; gap: 5px; }
.brand-copy strong { font-size: 18px; letter-spacing: .12em; }
.brand-copy small { font-size: 8px; color: var(--muted); letter-spacing: .19em; }
.site-nav { display: flex; align-items: center; gap: 30px; font-size: 14px; }
.site-nav > a:not(.nav-login) { color: #40545a; transition: color .2s ease; }
.site-nav > a:not(.nav-login):hover { color: var(--teal); }
.nav-login { padding: 12px 19px; color: #fff; border-radius: 10px; background: var(--ink); }
.nav-toggle { display: none; width: 42px; height: 42px; padding: 10px; border: 0; border-radius: 10px; background: var(--ink); }
.nav-toggle > span:not(.sr-only) { display: block; height: 2px; margin: 4px 0; border-radius: 2px; background: #fff; }

.hero {
  min-height: 780px;
  padding-top: 160px;
  padding-bottom: 90px;
  display: grid;
  grid-template-columns: 1.04fr .96fr;
  align-items: center;
  gap: 72px;
}
.hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: 0;
  left: 0;
  width: 54%;
  height: 760px;
  background: radial-gradient(circle at 15% 20%, rgba(97, 214, 201, .18), transparent 33%), linear-gradient(135deg, #edf8f5, transparent 68%);
  border-bottom-right-radius: 54%;
}
.eyebrow { display: flex; align-items: center; gap: 10px; color: var(--teal); font-size: 11px; font-weight: 700; letter-spacing: .18em; text-transform: uppercase; }
.eyebrow > span { width: 26px; height: 1px; background: currentColor; }
.hero h1 { max-width: 690px; margin: 24px 0 26px; font-size: clamp(46px, 5.3vw, 76px); line-height: 1.11; letter-spacing: -.055em; }
.hero h1 em { color: var(--teal); font-style: normal; }
.hero-copy > p { max-width: 610px; margin: 0; color: #52676d; font-size: 17px; line-height: 1.9; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 38px; }
.button { min-height: 52px; padding: 0 24px; display: inline-flex; align-items: center; justify-content: center; gap: 17px; border: 1px solid transparent; border-radius: 12px; font-size: 14px; font-weight: 650; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: var(--teal); box-shadow: 0 14px 30px rgba(13, 123, 114, .22); }
.button-primary:hover { box-shadow: 0 18px 35px rgba(13, 123, 114, .3); }
.button-secondary { border-color: var(--line); background: #fff; }
.hero-note { margin-top: 28px; display: flex; align-items: center; gap: 9px; color: var(--muted); font-size: 12px; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: #30b7a8; box-shadow: 0 0 0 6px rgba(48, 183, 168, .1); }

.hero-visual { position: relative; min-height: 530px; display: grid; place-items: center; }
.hero-visual::before { content: ""; position: absolute; inset: 0; border-radius: 50%; background: radial-gradient(circle, rgba(13, 123, 114, .12), transparent 66%); }
.orbit { position: absolute; border: 1px solid rgba(13, 123, 114, .15); border-radius: 50%; }
.orbit-one { width: 450px; height: 450px; }
.orbit-two { width: 340px; height: 340px; border-style: dashed; animation: rotate 28s linear infinite; }
.visual-card { position: relative; z-index: 2; width: min(390px, 88%); padding: 25px; color: #fff; border: 1px solid rgba(255,255,255,.13); border-radius: 26px; background: linear-gradient(155deg, #0b3038, #07171f); box-shadow: 0 35px 90px rgba(4, 25, 32, .28); }
.visual-header { display: flex; align-items: flex-start; justify-content: space-between; padding-bottom: 22px; }
.visual-header > div { display: grid; gap: 7px; }
.visual-header small { color: #72b8b1; font-size: 9px; letter-spacing: .19em; }
.visual-header strong { font-size: 20px; }
.ai-chip { padding: 6px 9px; color: var(--teal-light); border: 1px solid rgba(97,214,201,.2); border-radius: 99px; background: rgba(97,214,201,.08); font-size: 10px; }
.insight-card { padding: 16px; display: flex; gap: 13px; border-radius: 16px; background: linear-gradient(135deg, rgba(97,214,201,.16), rgba(255,255,255,.05)); }
.insight-icon { width: 36px; height: 36px; flex: 0 0 auto; display: grid; place-items: center; color: var(--gold); border-radius: 10px; background: rgba(201,154,74,.14); }
.insight-card div { display: grid; gap: 5px; }
.insight-card small { color: var(--teal-light); font-size: 11px; }
.insight-card p { margin: 0; color: #dbe8e9; font-size: 13px; line-height: 1.55; }
.journey-list { margin-top: 15px; display: grid; gap: 8px; }
.journey-item { padding: 13px 14px; display: grid; grid-template-columns: 28px 1fr 7px; align-items: center; gap: 11px; color: #bfd0d2; border: 1px solid rgba(255,255,255,.07); border-radius: 13px; }
.journey-item > span { color: #67868a; font: 10px ui-monospace, monospace; }
.journey-item > div { display: grid; gap: 3px; }
.journey-item strong { color: #fff; font-size: 13px; }
.journey-item small { color: #789398; font-size: 10px; }
.journey-item i { width: 7px; height: 7px; border-radius: 50%; background: #35535a; }
.journey-item.active { background: rgba(97,214,201,.07); border-color: rgba(97,214,201,.2); }
.journey-item.active i { background: var(--teal-light); box-shadow: 0 0 12px var(--teal-light); }
.floating-card { position: absolute; z-index: 3; min-width: 130px; padding: 13px 16px; display: grid; gap: 4px; border: 1px solid rgba(255,255,255,.7); border-radius: 14px; background: rgba(255,255,255,.88); box-shadow: var(--shadow); backdrop-filter: blur(12px); }
.floating-card span { color: var(--muted); font-size: 10px; }
.floating-card strong { font-size: 14px; }
.floating-top { top: 86px; right: -8px; }
.floating-bottom { bottom: 62px; left: -12px; }
.mini-program-card {
  position: absolute;
  z-index: 4;
  right: -34px;
  bottom: 16px;
  width: 304px;
  padding: 11px;
  display: grid;
  grid-template-columns: 142px 1fr;
  align-items: center;
  gap: 13px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.82);
  border-radius: 20px;
  background: rgba(255,255,255,.94);
  box-shadow: 0 24px 65px rgba(7,28,37,.18);
  backdrop-filter: blur(16px);
}
.mini-program-code-wrap { position: relative; padding: 5px; overflow: hidden; border: 1px solid rgba(7,28,37,.08); border-radius: 12px; background: #fff; }
.mini-program-code { width: 100%; display: block; border-radius: 9px; }
.mini-program-copy { padding: 3px 7px 3px 0; display: grid; gap: 6px; }
.mini-program-kicker { color: var(--teal); font: 700 8px ui-monospace, monospace; letter-spacing: .15em; }
  .mini-program-copy strong { color: var(--ink); font-size: 13px; line-height: 1.45; }
.mini-program-copy p { margin: 0; color: var(--muted); font-size: 10px; line-height: 1.55; }

.section-heading { max-width: 720px; }
.section-heading h2, .model-intro h2, .ai-copy h2, .cta-card h2 { margin: 20px 0 18px; font-size: clamp(34px, 4vw, 52px); line-height: 1.2; letter-spacing: -.035em; }
.section-heading > p, .model-intro > p, .ai-copy > p { margin: 0; color: var(--muted); line-height: 1.85; }
.feature-grid { margin-top: 52px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature-card { position: relative; min-height: 390px; padding: 32px; overflow: hidden; border: 1px solid var(--line); border-radius: 22px; background: #fff; transition: transform .25s ease, box-shadow .25s ease; }
.feature-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.feature-card.featured { color: #fff; border-color: transparent; background: var(--ink); }
.feature-index { position: absolute; top: 22px; right: 24px; color: #b5c1c3; font: 11px ui-monospace, monospace; }
.feature-icon { width: 50px; height: 50px; display: grid; place-items: center; color: var(--teal); border-radius: 15px; background: var(--mint); font-size: 26px; }
.feature-card.featured .feature-icon { color: var(--teal-light); background: rgba(97,214,201,.12); }
.feature-card h3 { margin: 28px 0 14px; font-size: 24px; }
.feature-card p { min-height: 82px; margin: 0; color: var(--muted); font-size: 14px; line-height: 1.8; }
.feature-card.featured p { color: #a9bec2; }
.feature-card ul { margin: 25px 0 0; padding: 20px 0 0; display: grid; gap: 12px; border-top: 1px solid var(--line); list-style: none; }
.feature-card.featured ul { border-color: rgba(255,255,255,.1); }
.feature-card li { display: flex; align-items: center; gap: 10px; font-size: 13px; }
.feature-card li::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: var(--gold); }

.lifecycle-section { color: #fff; background: var(--ink); }
.section-heading.light p { color: #9ab0b4; }
.section-heading.light .eyebrow { color: var(--teal-light); }
.lifecycle-track { position: relative; margin-top: 62px; display: grid; grid-template-columns: repeat(6, 1fr); }
.lifecycle-track::before { content: ""; position: absolute; top: 19px; right: 7%; left: 7%; height: 1px; background: linear-gradient(90deg, var(--teal-light), rgba(97,214,201,.14)); }
.lifecycle-track > div { position: relative; padding: 0 16px; display: grid; justify-items: center; text-align: center; }
.lifecycle-track span { position: relative; z-index: 1; width: 40px; height: 40px; display: grid; place-items: center; color: var(--teal-light); border: 1px solid rgba(97,214,201,.3); border-radius: 50%; background: var(--ink); font: 10px ui-monospace, monospace; }
.lifecycle-track strong { margin-top: 20px; font-size: 16px; }
.lifecycle-track small { margin-top: 8px; color: #81999e; font-size: 11px; line-height: 1.55; }

.customer-model { display: grid; grid-template-columns: .8fr 1.2fr; align-items: center; gap: 80px; }
.model-board { padding: 22px; display: grid; grid-template-columns: 1fr 120px 1fr; align-items: stretch; border: 1px solid var(--line); border-radius: 28px; background: var(--cream); }
.model-board article { min-height: 260px; padding: 25px; display: flex; flex-direction: column; justify-content: flex-end; border-radius: 18px; background: #fff; }
.model-board article.platform-customer { color: #fff; background: linear-gradient(145deg, #0d7b72, #07554f); }
.model-label { margin-bottom: auto; color: var(--teal); font-size: 9px; font-weight: 700; letter-spacing: .17em; }
.platform-customer .model-label { color: #8de4da; }
.model-board h3 { margin: 0 0 12px; font-size: 22px; }
.model-board p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.75; }
.platform-customer p { color: #bde1dd; }
.model-transfer { display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; }
.model-transfer span { color: var(--teal); font-size: 11px; font-weight: 700; }
.model-transfer i { margin: 11px 0; font-size: 25px; font-style: normal; }
.model-transfer small { max-width: 78px; color: var(--muted); font-size: 9px; line-height: 1.45; }

.ai-panel { padding: 68px; display: grid; grid-template-columns: 1.05fr .95fr; gap: 80px; border-radius: 30px; background: linear-gradient(135deg, #e6f6f2, #f5f1e8); }
.ai-copy h2 { margin-bottom: 22px; }
.ai-points { display: grid; gap: 10px; }
.ai-points > div { padding: 18px; display: grid; grid-template-columns: 34px 1fr; align-items: center; gap: 12px; border: 1px solid rgba(255,255,255,.8); border-radius: 15px; background: rgba(255,255,255,.62); }
.ai-points span { color: var(--teal); font: 10px ui-monospace, monospace; }
.ai-points p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.6; }
.ai-points strong { display: block; margin-bottom: 3px; color: var(--ink); font-size: 15px; }

.cta-section { padding-bottom: 70px; }
.cta-card { padding: 62px; display: flex; align-items: center; justify-content: space-between; gap: 40px; color: #fff; border-radius: 28px; background: var(--teal); overflow: hidden; }
.cta-card .eyebrow { color: #a7eee6; }
.cta-card h2 { max-width: 700px; margin-bottom: 12px; }
.cta-card p { margin: 0; color: #bde4df; }
.button-light { flex: 0 0 auto; color: var(--ink); background: #fff; }
.site-footer { padding-block: 30px 40px; display: grid; grid-template-columns: 1fr auto auto; align-items: center; gap: 34px; color: var(--muted); border-top: 1px solid var(--line); font-size: 11px; }
.footer-brand { display: flex; align-items: baseline; gap: 12px; }
.footer-brand strong { color: var(--ink); font-size: 17px; letter-spacing: .1em; }
.footer-brand span { font-size: 10px; }

.reveal { opacity: 0; transform: translateY(20px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
@keyframes rotate { to { transform: rotate(360deg); } }

@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; gap: 30px; }
  .hero-copy { text-align: center; }
  .hero-copy .eyebrow, .hero-actions, .hero-note { justify-content: center; }
  .hero-copy > p { margin-inline: auto; }
  .hero-visual { min-height: 500px; }
  .mini-program-card { right: 2%; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card { min-height: auto; }
  .feature-card p { min-height: auto; }
  .lifecycle-track { grid-template-columns: repeat(3, 1fr); gap: 38px 0; }
  .lifecycle-track::before { display: none; }
  .customer-model { grid-template-columns: 1fr; gap: 42px; }
  .ai-panel { padding: 45px; grid-template-columns: 1fr; gap: 36px; }
}

@media (max-width: 720px) {
  .section-shell { width: min(100% - 30px, 1180px); }
  .section-space { padding-block: 82px; }
  .site-header { top: 10px; width: calc(100% - 24px); height: 62px; }
  .brand-mark { width: 34px; height: 34px; }
  .brand-copy strong { font-size: 16px; }
  .nav-toggle { display: block; }
  .site-nav { position: absolute; top: calc(100% + 8px); right: 0; left: 0; padding: 16px; display: none; flex-direction: column; align-items: stretch; gap: 4px; border: 1px solid var(--line); border-radius: 16px; background: #fff; box-shadow: var(--shadow); }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 12px; }
  .nav-login { text-align: center; }
  .hero { min-height: auto; padding-top: 125px; padding-bottom: 60px; }
  .hero h1 { margin-top: 19px; font-size: clamp(40px, 12vw, 58px); }
  .hero-copy > p { font-size: 15px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .button { width: 100%; }
  .hero-visual { min-height: 450px; }
  .orbit-one { width: 350px; height: 350px; }
  .orbit-two { width: 270px; height: 270px; }
  .visual-card { padding: 19px; }
  .floating-card { display: none; }
  .hero-visual { min-height: auto; padding-top: 24px; display: flex; flex-direction: column; gap: 16px; }
  .mini-program-card { position: relative; right: auto; bottom: auto; width: min(100%, 390px); padding: 11px; grid-template-columns: 136px 1fr; gap: 12px; }
  .mini-program-copy { padding: 4px 4px 4px 0; }
  .mini-program-copy strong { font-size: 13px; }
  .mini-program-copy p { font-size: 10px; }
  .feature-grid { margin-top: 35px; }
  .lifecycle-track { grid-template-columns: repeat(2, 1fr); }
  .model-board { padding: 12px; grid-template-columns: 1fr; }
  .model-transfer { min-height: 110px; }
  .model-transfer i { transform: rotate(90deg); }
  .ai-panel { padding: 30px 22px; }
  .cta-card { padding: 38px 24px; flex-direction: column; align-items: flex-start; }
  .button-light { width: 100%; }
  .site-footer { grid-template-columns: 1fr; gap: 12px; text-align: center; }
  .footer-brand { justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .orbit-two { animation: none; }
  .reveal { opacity: 1; transform: none; transition: none; }
}