:root {
  --green: #07c160;
  --green-deep: #058a45;
  --green-soft: #e9f8ef;
  --ink: #102018;
  --text: #1f2937;
  --muted: #667085;
  --line: #dfe4dc;
  --surface: #ffffff;
  --surface-soft: #f5f7f4;
  --surface-tint: #f1f7f2;
  --surface-dark: #183126;
  --shadow: 0 24px 64px rgba(17, 24, 39, 0.08);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --max: 1240px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(7, 193, 96, 0.08), transparent 24%),
    linear-gradient(180deg, #f7faf7 0%, #eef3ee 100%);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC",
    -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.75;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

h1,
h2,
h3,
h4,
p,
dl,
dd {
  margin: 0;
}

ul {
  margin: 0;
  padding: 0;
}

.shell {
  width: min(calc(100% - 40px), var(--max));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid rgba(223, 228, 220, 0.72);
  background: rgba(247, 250, 247, 0.9);
  backdrop-filter: blur(16px);
}

.header-inner,
.site-footer .footer-inner,
.hero-actions,
.header-cta-block,
.cta-actions,
.header-actions,
.main-nav,
.hero-facts,
.voice-flow,
.footer-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.header-inner {
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}

.header-cta-block,
.cta-actions {
  display: grid;
  justify-items: end;
  gap: 6px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border-radius: 14px;
  background: var(--green);
  color: #fff;
  font-weight: 800;
  font-size: 20px;
}

.brand-text {
  display: grid;
}

.brand-text strong {
  color: var(--ink);
  font-size: 16px;
}

.brand-text em {
  color: var(--muted);
  font-style: normal;
  font-size: 12px;
}

.main-nav {
  align-items: center;
  justify-content: center;
}

.main-nav a {
  color: var(--muted);
  font-size: 14px;
}

.main-nav a:hover,
.footer-links a:hover {
  color: var(--ink);
}

.primary-button,
.secondary-button,
.ghost-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 14px;
  border: 1px solid transparent;
  font-weight: 700;
  font-size: 14px;
}

.primary-button {
  background: var(--green);
  color: #fff;
}

.secondary-button {
  border-color: var(--line);
  background: #fff;
}

.ghost-button {
  border-color: rgba(7, 193, 96, 0.28);
  background: rgba(233, 248, 239, 0.78);
  color: var(--green-deep);
}

.large {
  min-height: 50px;
  padding-inline: 22px;
  font-size: 15px;
}

.is-disabled {
  opacity: 0.58;
  cursor: default;
  pointer-events: none;
}

.hero-section {
  padding: 36px 0 26px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.94fr) minmax(420px, 1.06fr);
  gap: 28px;
  align-items: center;
}

.eyebrow {
  color: var(--green-deep);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.hero-copy h1 {
  margin-top: 12px;
  color: var(--ink);
  font-size: clamp(38px, 5vw, 68px);
  line-height: 1.18;
  letter-spacing: -0.03em;
}

.hero-text {
  max-width: 660px;
  margin-top: 16px;
  color: var(--muted);
  font-size: 17px;
}

.hero-actions {
  margin-top: 22px;
}

.hero-facts {
  margin-top: 24px;
}

.hero-facts div,
.step-card,
.feature-grid article,
.screen-story,
.scenario-grid article,
.download-card,
.faq-list details,
.copy-list,
.cta-inner,
.section-head,
.app-window,
.floating-note {
  border: 1px solid rgba(223, 228, 220, 0.92);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow);
}

.hero-facts div {
  min-width: 150px;
  padding: 14px 16px;
}

.hero-facts dt {
  color: var(--ink);
  font-weight: 800;
}

.hero-facts dd {
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
}

.hero-visual {
  position: relative;
}

.app-window {
  overflow: hidden;
  border-radius: var(--radius-xl);
  background: #f4f6f4;
}

.window-top {
  display: flex;
  gap: 8px;
  padding: 14px 16px;
}

.window-top span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #ff5f57;
}

.window-top span:nth-child(2) {
  background: #febc2e;
}

.window-top span:nth-child(3) {
  background: #28c840;
}

.window-body {
  display: grid;
  grid-template-columns: 86px 1fr;
  min-height: 470px;
}

.window-rail {
  display: grid;
  align-content: start;
  gap: 12px;
  padding: 16px 12px;
  background: #303533;
  color: #d7d9d8;
}

.rail-logo,
.rail-item {
  display: grid;
  place-items: center;
  min-height: 56px;
  border-radius: 14px;
  font-size: 13px;
  font-weight: 700;
}

.rail-logo {
  background: var(--green);
  color: #fff;
}

.rail-item {
  background: rgba(255, 255, 255, 0.06);
}

.rail-item.active {
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
}

.window-main {
  padding: 20px;
}

.window-toolbar {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-bottom: 12px;
}

.window-toolbar strong {
  color: var(--ink);
  font-size: 18px;
}

.window-toolbar span {
  color: var(--muted);
  font-size: 13px;
}

.subtitle-grid {
  display: grid;
  gap: 14px;
}

.subtitle-card,
.todo-panel,
.voice-flow div {
  border: 1px solid rgba(223, 228, 220, 0.92);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.96);
}

.subtitle-card {
  padding: 16px 18px;
}

.subtitle-card span,
.todo-panel strong {
  color: var(--green-deep);
  font-size: 13px;
  font-weight: 800;
}

.subtitle-card p {
  margin-top: 10px;
  font-size: 18px;
  line-height: 1.65;
}

.subtitle-card.emphasis {
  background: var(--green-soft);
}

.voice-flow {
  margin-top: 14px;
}

.voice-flow div {
  flex: 1 1 220px;
  padding: 14px 16px;
  background: #f5f8f5;
}

.voice-flow strong {
  display: block;
  color: var(--ink);
  font-size: 14px;
}

.voice-flow span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
}

.todo-panel {
  margin-top: 14px;
  padding: 16px 18px;
}

.todo-panel ul {
  margin-top: 12px;
}

.todo-panel li {
  list-style: none;
  color: var(--muted);
}

.todo-panel li + li {
  margin-top: 8px;
}

.floating-note {
  position: absolute;
  right: -10px;
  bottom: -12px;
  width: 248px;
  padding: 16px;
  border: 0;
  background: var(--surface-dark);
  color: #fff;
  box-shadow: 0 22px 48px rgba(24, 49, 38, 0.24);
}

.floating-note strong {
  display: block;
  font-size: 18px;
}

.floating-note span {
  display: block;
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 13px;
}

.section {
  padding: 76px 0;
}

.section.muted {
  background: rgba(241, 247, 242, 0.76);
  border-top: 1px solid rgba(223, 228, 220, 0.72);
  border-bottom: 1px solid rgba(223, 228, 220, 0.72);
}

.section-head {
  padding: 0;
  border: 0;
  box-shadow: none;
  background: transparent;
  max-width: 820px;
  margin-bottom: 26px;
}

.section-head h2,
.two-column h2,
.cta-inner h2 {
  margin-top: 8px;
  color: var(--ink);
  font-size: 40px;
  line-height: 1.24;
}

.section-head p:last-child,
.copy-list p,
.cta-inner p:last-child {
  margin-top: 12px;
  color: var(--muted);
  font-size: 16px;
}

.steps-grid,
.feature-grid,
.screen-story-list,
.scenario-grid {
  display: grid;
  gap: 16px;
}

.steps-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.step-card {
  min-height: 220px;
  padding: 20px;
}

.step-index {
  display: inline-flex;
  width: 32px;
  height: 32px;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  border-radius: 999px;
  background: var(--green);
  color: #fff;
  font-weight: 800;
}

.step-card h3,
.feature-grid h3,
.screen-copy strong,
.scenario-grid h3,
.download-card strong,
.faq-list summary {
  color: var(--ink);
  font-size: 20px;
  line-height: 1.4;
}

.step-card p,
.feature-grid p,
.screen-copy p,
.scenario-grid p,
.download-card span,
.faq-list p {
  margin-top: 10px;
  color: var(--muted);
}

.two-column {
  display: grid;
  grid-template-columns: minmax(280px, 0.82fr) minmax(0, 1.18fr);
  gap: 38px;
}

.copy-list {
  padding: 24px;
}

.copy-list p + p {
  margin-top: 14px;
}

.feature-grid {
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.feature-grid article,
.screen-story,
.scenario-grid article,
.download-card,
.faq-list details {
  padding: 22px;
}

.feature-grid article {
  grid-column: span 2;
}

.feature-grid article:nth-child(4),
.feature-grid article:nth-child(5) {
  grid-column: span 3;
}

.screen-story-list {
  gap: 22px;
}

.screen-image {
  display: block;
  width: 100%;
  border-radius: 20px;
  border: 1px solid rgba(223, 228, 220, 0.92);
  background: linear-gradient(180deg, #f5f8f5 0%, #eef3ef 100%);
  min-height: 360px;
  object-fit: cover;
  object-position: center top;
  box-shadow: 0 18px 42px rgba(17, 24, 39, 0.06);
}

.screen-copy {
  display: grid;
  gap: 8px;
  margin-top: 16px;
}

.screen-copy strong {
  color: var(--ink);
  font-size: 24px;
  line-height: 1.35;
}

.screen-copy p {
  margin-top: 0;
  max-width: 860px;
  color: var(--muted);
  font-size: 16px;
}

.scenario-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.download-stack {
  display: grid;
  gap: 14px;
}

.download-card {
  display: grid;
  gap: 6px;
}

.download-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 6px;
}

.download-note {
  color: var(--muted);
  font-size: 14px;
}

.launch-note {
  color: var(--green-deep);
  font-size: 13px;
  font-weight: 700;
}

.launch-note.compact {
  text-align: right;
}

.faq-list {
  display: grid;
  gap: 14px;
}

.faq-list summary {
  cursor: pointer;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list p {
  margin-top: 12px;
}

.cta-section {
  padding: 0 0 76px;
}

.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 28px;
  background: linear-gradient(180deg, #f8fcf8 0%, #edf8ef 100%);
}

.site-footer {
  border-top: 1px solid rgba(223, 228, 220, 0.72);
  background: rgba(255, 255, 255, 0.84);
}

.footer-inner {
  align-items: center;
  justify-content: space-between;
  padding: 22px 0 28px;
}

.footer-inner strong {
  color: var(--ink);
  font-size: 16px;
}

.footer-inner p {
  margin-top: 6px;
  color: var(--muted);
  font-size: 14px;
  max-width: 680px;
}

@media (max-width: 1120px) {
  .header-inner,
  .cta-inner,
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-grid,
  .two-column,
  .steps-grid,
  .feature-grid,
  .screen-story-list,
  .scenario-grid {
    grid-template-columns: 1fr;
  }

  .floating-note {
    position: static;
    width: auto;
    margin-top: 16px;
  }

  .header-cta-block,
  .cta-actions {
    justify-items: start;
  }
}

@media (max-width: 820px) {
  .shell {
    width: min(calc(100% - 24px), var(--max));
  }

  .main-nav {
    display: none;
  }

  .hero-copy h1,
  .section-head h2,
  .two-column h2,
  .cta-inner h2 {
    font-size: 30px;
  }

  .window-body {
    grid-template-columns: 1fr;
  }

  .window-rail {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    align-items: center;
  }

  .voice-flow {
    flex-direction: column;
  }
}