:root {
  --font: "PingFang SC", "Microsoft YaHei UI", "Segoe UI", Arial, sans-serif;
  --bg: #f5fbf8;
  --bg-soft: #eef8f3;
  --panel: rgba(255, 255, 255, 0.84);
  --panel-solid: #ffffff;
  --ink: #13271f;
  --muted: #60736b;
  --line: rgba(25, 81, 59, 0.12);
  --green: #24a66f;
  --green-strong: #147a50;
  --green-deep: #0d3d2c;
  --mint: #baf4d8;
  --blue: #2d82d8;
  --shadow: 0 24px 70px rgba(20, 83, 59, 0.12);
  --radius-sm: 16px;
  --radius: 24px;
  --radius-lg: 34px;
}

:root[data-theme="dark"] {
  --bg: #07140f;
  --bg-soft: #0b1d16;
  --panel: rgba(13, 34, 26, 0.86);
  --panel-solid: #0e211a;
  --ink: #e9fff5;
  --muted: #9ab6a9;
  --line: rgba(176, 239, 210, 0.12);
  --green: #61dfa2;
  --green-strong: #8bf0bd;
  --green-deep: #d8ffeb;
  --mint: #163f2e;
  --blue: #67aef2;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.34);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 92px; }
body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  font-family: var(--font);
  line-height: 1.65;
  background:
    radial-gradient(circle at 8% 2%, rgba(82, 224, 157, 0.16), transparent 28%),
    radial-gradient(circle at 90% 8%, rgba(69, 149, 226, 0.13), transparent 24%),
    var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background 220ms ease, color 220ms ease;
}
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }
img { display: block; max-width: 100%; }
[id] { scroll-margin-top: 92px; }

.site-header {
  position: sticky;
  z-index: 30;
  top: 0;
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 10px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(20px) saturate(130%);
  -webkit-backdrop-filter: blur(20px) saturate(130%);
}

.brand, .footer-brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 900; }
.brand img { width: 42px; height: 42px; border-radius: 13px; box-shadow: 0 8px 24px rgba(12, 72, 49, 0.2); }
.header-actions, .nav-links { display: flex; align-items: center; }
.header-actions { gap: 10px; }
.nav-links { gap: clamp(14px, 2vw, 28px); color: var(--muted); font-size: 14px; font-weight: 750; }
.nav-links a { transition: color 160ms ease, transform 160ms ease; }
.nav-links a:hover { color: var(--green-strong); transform: translateY(-1px); }
.nav-links .home-link { padding: 8px 13px; border: 1px solid var(--line); border-radius: 999px; color: var(--ink); background: var(--panel); }

.icon-button, .language-toggle, .menu-toggle {
  width: 39px;
  height: 39px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  cursor: pointer;
  transition: border-color 160ms ease, transform 160ms ease, background 160ms ease;
}
.icon-button:hover, .language-toggle:hover, .menu-toggle:hover { border-color: var(--green); transform: translateY(-1px); }
.theme-toggle { font-size: 20px; line-height: 1; }
:root[data-theme="light"] .theme-dark, :root[data-theme="dark"] .theme-light { display: none; }
.language-toggle { font-size: 12px; font-weight: 900; }
.menu-toggle { display: none; padding: 9px; }
.menu-toggle span { display: block; height: 2px; margin: 4px 0; border-radius: 2px; background: currentColor; }

.mobile-menu { display: none; position: fixed; inset: 0; z-index: 50; }
.mobile-menu.is-open { display: block; }
.mobile-menu-backdrop { position: absolute; inset: 0; width: 100%; height: 100%; padding: 0; border: 0; background: rgba(2, 10, 7, 0.48); }
.mobile-menu-panel {
  position: absolute;
  z-index: 1;
  top: 0;
  right: 0;
  width: min(360px, 88vw);
  height: 100%;
  padding: 24px;
  background: var(--panel-solid);
  box-shadow: -20px 0 60px rgba(0, 0, 0, 0.18);
}
.mobile-menu-head { display: flex; justify-content: space-between; align-items: center; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.mobile-menu-head button { border: 0; background: transparent; font-size: 30px; cursor: pointer; }
.mobile-menu nav { display: grid; gap: 8px; padding-top: 16px; }
.mobile-menu nav a { padding: 13px 14px; border-radius: 12px; font-weight: 800; }
.mobile-menu nav a:hover { background: var(--bg-soft); color: var(--green-strong); }
body.menu-open { overflow: hidden; }

.section-shell, .section { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.section { padding: 100px 0; }
.hero {
  min-height: calc(100vh - 74px);
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(500px, 1.08fr);
  align-items: center;
  gap: clamp(44px, 6vw, 86px);
  padding-top: 68px;
  padding-bottom: 72px;
}
.eyebrow {
  margin: 0 0 15px;
  color: var(--green-strong);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.hero h1 { max-width: 720px; margin: 0; font-size: clamp(42px, 5.6vw, 76px); line-height: 1.05; letter-spacing: -0.05em; }
.hero-text { max-width: 700px; margin: 28px 0 0; color: var(--muted); font-size: clamp(17px, 1.5vw, 20px); }
.download-actions { display: flex; flex-wrap: wrap; gap: 13px; margin-top: 32px; }
.download-button {
  position: relative;
  min-width: 235px;
  display: flex;
  align-items: center;
  gap: 13px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 17px;
  background: var(--panel-solid);
  box-shadow: 0 12px 34px rgba(24, 83, 61, 0.08);
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}
.download-button:hover { transform: translateY(-3px); border-color: var(--green); box-shadow: 0 18px 40px rgba(24, 83, 61, 0.15); }
.download-button.primary { color: white; border-color: transparent; background: linear-gradient(135deg, #16885a, #27b77b); }
.download-button strong, .download-button small { display: block; }
.download-button strong { font-size: 15px; }
.download-button small { margin-top: 2px; color: inherit; opacity: 0.72; font-size: 12px; }
.download-button.is-recommended::after {
  content: attr(data-recommended);
  position: absolute;
  top: -10px;
  right: 12px;
  padding: 2px 8px;
  border-radius: 999px;
  color: #083923;
  background: #adf1cf;
  box-shadow: 0 5px 16px rgba(6, 55, 33, 0.18);
  font-size: 10px;
  font-weight: 900;
}
.os-mark { width: 34px; height: 34px; display: grid; place-items: center; flex: 0 0 auto; border-radius: 11px; background: rgba(36, 166, 111, 0.12); font-weight: 900; }
.primary .os-mark { background: rgba(255, 255, 255, 0.17); }
.windows-mark { font-size: 24px; }
.download-note { margin: 13px 0 0; color: var(--muted); font-size: 12px; }

.hero-visual { position: relative; min-height: 530px; display: grid; place-items: center; }
.hero-visual::before { content: ""; position: absolute; width: 76%; aspect-ratio: 1; border-radius: 50%; background: radial-gradient(circle, rgba(70, 216, 148, 0.24), transparent 68%); filter: blur(12px); }
.studio-window {
  position: relative;
  z-index: 2;
  width: 100%;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--panel-solid);
  box-shadow: var(--shadow);
  transform: perspective(1300px) rotateY(-5deg) rotateX(2deg);
}
.window-bar { height: 48px; display: flex; align-items: center; gap: 7px; padding: 0 16px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 11px; font-weight: 800; }
.window-bar i { width: 8px; height: 8px; border-radius: 50%; background: #ff7b72; }
.window-bar i:nth-child(2) { background: #f5c05a; }
.window-bar i:nth-child(3) { background: #5fd28a; }
.window-bar span { margin-left: 8px; }
.studio-canvas { min-height: 410px; display: grid; grid-template-columns: 62px 1fr; }
.studio-sidebar { padding: 20px 15px; display: grid; align-content: start; gap: 15px; background: var(--green-deep); }
:root[data-theme="dark"] .studio-sidebar { background: #06110d; }
.studio-sidebar span { width: 31px; height: 31px; border-radius: 10px; background: rgba(255, 255, 255, 0.1); }
.studio-sidebar span.active { background: #5fdaa0; }
.studio-main { padding: 26px; background: linear-gradient(145deg, var(--panel-solid), var(--bg-soft)); }
.studio-title span, .studio-title small { display: block; border-radius: 999px; background: var(--line); }
.studio-title span { width: 155px; height: 13px; }
.studio-title small { width: 240px; height: 8px; margin-top: 10px; }
.pipeline { display: grid; grid-template-columns: repeat(7, auto); align-items: center; gap: 8px; margin-top: 28px; }
.pipeline div { min-width: 74px; display: grid; gap: 5px; justify-items: center; color: var(--muted); font-size: 10px; text-align: center; }
.pipeline b { width: 31px; height: 31px; display: grid; place-items: center; border-radius: 10px; color: #0a4930; background: #a7edcc; }
.pipeline i { width: 100%; min-width: 18px; height: 2px; background: linear-gradient(90deg, var(--mint), var(--green)); }
.pet-workspace { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 15px; margin-top: 26px; }
.pet-card { height: 205px; overflow: hidden; display: grid; place-items: end center; border: 1px solid var(--line); border-radius: 18px; background: linear-gradient(150deg, #ddf8e9, #f9fbf6); }
.pet-card img { width: 62%; max-height: 190px; object-fit: contain; object-position: bottom; }
.task-list { display: grid; gap: 9px; }
.task-list span { border: 1px solid var(--line); border-radius: 13px; background: var(--panel); }
.creator-badge { position: absolute; z-index: 4; top: 3%; left: -7%; width: 108px; border-radius: 27px; box-shadow: 0 22px 48px rgba(5, 58, 37, 0.26); transform: rotate(-7deg); }
.floating-chip { position: absolute; z-index: 5; padding: 9px 13px; border: 1px solid rgba(255, 255, 255, 0.46); border-radius: 999px; color: #073a25; background: rgba(188, 245, 218, 0.9); box-shadow: 0 12px 30px rgba(18, 75, 53, 0.18); backdrop-filter: blur(10px); font-size: 12px; font-weight: 900; }
.chip-one { right: -3%; bottom: 14%; }
.chip-two { left: 6%; bottom: 1%; }

.section-heading { max-width: 760px; margin-bottom: 40px; }
.section-heading h2, .start-card h2, .final-cta h2 { margin: 0; font-size: clamp(31px, 4vw, 52px); line-height: 1.14; letter-spacing: -0.04em; }
.section-heading > p:last-child { margin: 17px 0 0; color: var(--muted); font-size: 17px; }
.audience-grid, .workflow-grid, .capabilities-grid { display: grid; gap: 18px; }
.audience-grid { grid-template-columns: repeat(3, 1fr); }
.workflow-grid { grid-template-columns: repeat(4, 1fr); }
.capabilities-grid { grid-template-columns: repeat(3, 1fr); }
.audience-card, .workflow-card, .capability-card {
  position: relative;
  padding: 27px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: 0 13px 38px rgba(19, 69, 51, 0.05);
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}
.audience-card:hover, .workflow-card:hover, .capability-card:hover { transform: translateY(-5px); border-color: color-mix(in srgb, var(--green) 45%, var(--line)); box-shadow: 0 20px 46px rgba(19, 69, 51, 0.1); }
.audience-card > span, .workflow-card > b { color: var(--green); font-size: 12px; font-weight: 900; letter-spacing: 0.12em; }
.audience-card h3, .workflow-card h3, .capability-card h3 { margin: 17px 0 8px; font-size: 20px; }
.audience-card p, .workflow-card p, .capability-card p { margin: 0; color: var(--muted); font-size: 14px; }
.workflow-section { position: relative; }
.workflow-card { padding-top: 74px; }
.workflow-card > b { position: absolute; top: 23px; right: 24px; }
.workflow-icon { position: absolute; top: 20px; left: 24px; width: 39px; height: 39px; display: grid; place-items: center; border-radius: 12px; color: #0a5033; background: var(--mint); font-size: 19px; font-weight: 900; }
.capabilities-section { padding-top: 70px; }
.capability-card > span { min-width: 44px; height: 44px; display: inline-grid; place-items: center; padding: 0 8px; border-radius: 13px; color: var(--green-strong); background: var(--bg-soft); font-size: 14px; font-weight: 900; }

.start-card {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(380px, 0.95fr);
  gap: 60px;
  padding: clamp(32px, 5vw, 64px);
  overflow: hidden;
  border-radius: var(--radius-lg);
  color: #edfff6;
  background:
    radial-gradient(circle at 85% 15%, rgba(78, 218, 151, 0.28), transparent 28%),
    linear-gradient(145deg, #0a3425, #0b4d35);
  box-shadow: var(--shadow);
}
.start-card .eyebrow { color: #8ef0bd; }
.start-copy > p:last-child { margin: 20px 0 0; color: rgba(232, 255, 244, 0.7); }
.start-steps { margin: 0; padding: 0; list-style: none; display: grid; gap: 12px; }
.start-steps li { display: flex; align-items: center; gap: 15px; padding: 15px; border: 1px solid rgba(255, 255, 255, 0.11); border-radius: 16px; background: rgba(255, 255, 255, 0.06); }
.start-steps b { width: 40px; height: 40px; display: grid; place-items: center; flex: 0 0 auto; border-radius: 12px; color: #073923; background: #8be7b7; }
.start-steps strong, .start-steps small { display: block; }
.start-steps small { margin-top: 2px; color: rgba(232, 255, 244, 0.64); }

.faq-section { padding-top: 50px; }
.faq-list { display: grid; gap: 12px; }
.faq-list details { border: 1px solid var(--line); border-radius: 17px; background: var(--panel); }
.faq-list summary { padding: 20px 22px; cursor: pointer; font-weight: 900; }
.faq-list p { margin: 0; padding: 0 22px 21px; color: var(--muted); }

.final-cta {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  margin-top: 10px;
  margin-bottom: 90px;
  padding: 26px 30px;
  border: 1px solid var(--line);
  border-radius: 25px;
  background: var(--panel);
  box-shadow: var(--shadow);
}
.final-cta img { width: 72px; border-radius: 20px; }
.final-cta p { margin: 0 0 3px; color: var(--green-strong); font-size: 12px; font-weight: 900; }
.final-cta h2 { font-size: clamp(24px, 3vw, 37px); }
.final-cta > a { padding: 13px 20px; border-radius: 14px; color: #fff; background: linear-gradient(135deg, #18895b, #27b67a); font-weight: 900; }

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px clamp(20px, 5vw, 72px);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}
.footer-brand img { width: 34px; border-radius: 10px; }
.footer-links { display: flex; gap: 20px; font-weight: 800; }
.footer-links a:hover { color: var(--green-strong); }
.site-footer p { margin: 0; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity 600ms ease, transform 600ms ease; }
.reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 1080px) {
  .nav-links { display: none; }
  .menu-toggle { display: block; }
  .hero { grid-template-columns: 1fr; padding-top: 76px; }
  .hero-copy { max-width: 820px; }
  .hero-visual { width: min(760px, 100%); margin: 0 auto; }
  .workflow-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 780px) {
  .section-shell, .section { width: min(100% - 28px, 680px); }
  .section { padding: 74px 0; }
  .site-header { padding-inline: 16px; }
  .brand span { max-width: 128px; line-height: 1.2; font-size: 13px; }
  .hero { min-height: auto; gap: 36px; padding-top: 58px; }
  .hero h1 { font-size: clamp(39px, 12vw, 58px); }
  .hero-visual { min-height: 390px; }
  .studio-window { transform: none; }
  .studio-canvas { min-height: 320px; grid-template-columns: 46px 1fr; }
  .studio-sidebar { padding: 16px 9px; }
  .studio-sidebar span { width: 27px; height: 27px; }
  .studio-main { padding: 18px; }
  .pipeline div { min-width: 52px; font-size: 8px; }
  .pipeline b { width: 27px; height: 27px; }
  .pet-card { height: 160px; }
  .creator-badge { left: -2%; width: 82px; border-radius: 22px; }
  .audience-grid, .capabilities-grid { grid-template-columns: 1fr; }
  .start-card { grid-template-columns: 1fr; gap: 34px; }
  .final-cta { grid-template-columns: auto 1fr; }
  .final-cta > a { grid-column: 1 / -1; text-align: center; }
  .site-footer { flex-direction: column; text-align: center; }
}

@media (max-width: 560px) {
  html { scroll-padding-top: 76px; }
  .brand img { width: 38px; height: 38px; }
  .header-actions { gap: 7px; }
  .download-actions { display: grid; }
  .download-button { min-width: 0; width: 100%; }
  .hero-visual { min-height: 330px; }
  .window-bar { height: 42px; }
  .studio-canvas { min-height: 250px; grid-template-columns: 0 1fr; }
  .studio-sidebar { display: none; }
  .studio-main { padding: 14px; }
  .pipeline { gap: 4px; margin-top: 18px; }
  .pipeline div { min-width: 0; }
  .pipeline div span { display: none; }
  .pet-workspace { margin-top: 17px; }
  .pet-card { height: 125px; }
  .task-list { gap: 6px; }
  .creator-badge { top: -1%; width: 66px; border-radius: 18px; }
  .floating-chip { font-size: 9px; }
  .chip-one { right: 0; bottom: 8%; }
  .chip-two { left: 4%; bottom: 0; }
  .workflow-grid { grid-template-columns: 1fr; }
  .start-card { padding: 27px 20px; }
  .start-steps li { align-items: flex-start; }
  .final-cta { margin-bottom: 60px; padding: 22px; }
  .final-cta img { width: 58px; }
  .footer-links { flex-direction: column; gap: 7px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition-duration: 0.01ms !important; }
  .reveal { opacity: 1; transform: none; }
}