:root {
  color-scheme: light;
  --bg: #faf7f0;
  --bg-elevated: rgba(255, 253, 248, 0.92);
  --surface: rgba(255, 255, 255, 0.82);
  --surface-strong: #fffdf8;
  --text-primary: #171717;
  --text-secondary: #505050;
  --text-tertiary: #767676;
  --border: rgba(0, 0, 0, 0.06);
  --border-soft: rgba(255, 255, 255, 0.72);
  --accent: #dd7a2f;
  --accent-soft: rgba(221, 122, 47, 0.12);
  --shadow-lg: 0 22px 48px rgba(17, 17, 17, 0.08);
  --shadow-md: 0 12px 28px rgba(17, 17, 17, 0.05);
  --shadow-sm: 0 8px 20px rgba(17, 17, 17, 0.04);
  --radius-xl: 32px;
  --radius-lg: 28px;
  --radius-md: 22px;
  --max-width: 1080px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "SF Pro Display", "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.95), transparent 38%),
    linear-gradient(180deg, #fffdf8 0%, #faf7f0 100%);
  color: var(--text-primary);
  line-height: 1.7;
}

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

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

.site-shell {
  min-height: 100vh;
}

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

.narrow-container {
  width: min(calc(100% - 40px), 860px);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(18px);
  background: rgba(250, 247, 240, 0.82);
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 78px;
}

.brand {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 18px;
}

.site-nav a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: color 180ms ease;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--text-primary);
}

.hero-section {
  padding: 60px 0 32px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(300px, 0.8fr);
  gap: 22px;
  align-items: stretch;
}

.surface {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(22px);
  border-radius: var(--radius-lg);
}

.surface-large {
  border-radius: var(--radius-xl);
}

.hero-copy {
  padding: 44px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.hero-copy h1,
.section-heading h1 {
  margin: 0;
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  line-height: 1.08;
  letter-spacing: 0;
}

.hero-copy h2 {
  margin: 18px 0 0;
  max-width: 18em;
  color: var(--text-secondary);
  font-size: clamp(1.12rem, 2vw, 1.48rem);
  font-weight: 600;
  line-height: 1.45;
}

.lead {
  margin: 24px 0 0;
  max-width: 62ch;
  color: var(--text-secondary);
  font-size: 1rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 650;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    background-color 180ms ease,
    border-color 180ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 12px 24px rgba(221, 122, 47, 0.18);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.72);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.hero-panel {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 28px;
}

.panel-label {
  margin: 0;
  color: var(--text-tertiary);
  font-size: 0.92rem;
}

.fact-list {
  display: grid;
  gap: 18px;
  margin: 18px 0 0;
}

.fact-list div {
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.fact-list div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.fact-list dt {
  color: var(--text-tertiary);
  font-size: 0.88rem;
}

.fact-list dd {
  margin: 6px 0 0;
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 600;
}

.panel-note {
  margin-top: 28px;
  padding: 16px 18px;
  background: var(--accent-soft);
  border-radius: 18px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.content-section {
  padding: 22px 0;
}

.section-heading {
  margin-bottom: 20px;
}

.section-heading-compact {
  margin-bottom: 18px;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  line-height: 1.18;
  letter-spacing: 0;
}

.section-heading p:last-child {
  margin: 14px 0 0;
  max-width: 64ch;
  color: var(--text-secondary);
}

.prose-card,
.info-card,
.privacy-card {
  padding: 30px;
}

.prose-card p,
.privacy-card p {
  margin: 0;
  color: var(--text-secondary);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.feature-card {
  padding: 28px;
}

.feature-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 54px;
  min-height: 32px;
  padding: 0 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
}

.feature-card h3 {
  margin: 18px 0 10px;
  font-size: 1.2rem;
  letter-spacing: 0;
}

.feature-card p {
  margin: 0;
  color: var(--text-secondary);
}

.capability-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 18px;
  margin-top: 18px;
}

.capability-card {
  padding: 28px;
}

.capability-label {
  margin: 0;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.capability-card h3 {
  margin: 12px 0 0;
  font-size: 1.2rem;
  letter-spacing: 0;
}

.capability-copy {
  margin: 14px 0 0;
  color: var(--text-secondary);
}

.capability-list {
  margin: 16px 0 0;
  padding-left: 18px;
  color: var(--text-secondary);
}

.capability-list li + li {
  margin-top: 8px;
}

.showcase-block {
  margin-top: 18px;
  padding: 28px;
}

.showcase-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 22px;
}

.showcase-header h3 {
  margin: 12px 0 0;
  font-size: 1.32rem;
  letter-spacing: 0;
}

.showcase-intro {
  margin: 0;
  max-width: 36ch;
  color: var(--text-secondary);
}

.showcase-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.screenshot-card {
  margin: 0;
  padding: 12px;
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid rgba(0, 0, 0, 0.05);
  border-radius: 28px;
  box-shadow: var(--shadow-sm);
}

.screenshot-frame {
  overflow: hidden;
  border-radius: 22px;
  background: #f5f1e8;
  border: 1px solid rgba(0, 0, 0, 0.04);
}

.screenshot-frame img {
  width: 100%;
  height: auto;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.info-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 22px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.info-item-wide {
  grid-column: 1 / -1;
}

.info-label {
  color: var(--text-tertiary);
  font-size: 0.88rem;
}

.info-item strong,
.contact-card strong {
  font-size: 1rem;
  line-height: 1.6;
  word-break: break-word;
}

.inline-link {
  text-decoration: underline;
  text-decoration-color: rgba(221, 122, 47, 0.35);
  text-underline-offset: 4px;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.contact-card {
  padding: 28px;
}

.contact-card-wide {
  grid-column: 1 / -1;
}

.contact-link {
  color: var(--text-primary);
  font-size: 1.02rem;
  font-weight: 650;
}

.policy-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 18px;
  color: var(--text-tertiary);
  font-size: 0.92rem;
}

.policy-section + .policy-section {
  margin-top: 26px;
  padding-top: 26px;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.policy-section h2 {
  margin: 0 0 10px;
  font-size: 1.2rem;
  letter-spacing: 0;
}

.site-footer {
  padding: 34px 0 48px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.footer-inner p,
.footer-inner a {
  margin: 0;
  color: var(--text-tertiary);
  font-size: 0.94rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

@media (max-width: 900px) {
  .header-inner,
  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero-grid,
  .feature-grid,
  .capability-grid,
  .showcase-grid,
  .info-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .container,
  .narrow-container {
    width: min(calc(100% - 28px), var(--max-width));
  }

  .site-header {
    position: static;
  }

  .hero-section {
    padding-top: 26px;
  }

  .header-inner {
    min-height: auto;
    padding: 18px 0;
  }

  .site-nav {
    width: 100%;
    justify-content: flex-start;
    flex-wrap: nowrap;
    gap: 12px;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }

  .site-nav::-webkit-scrollbar {
    display: none;
  }

  .site-nav a {
    flex: 0 0 auto;
    font-size: 0.92rem;
  }

  .hero-copy,
  .hero-panel,
  .prose-card,
  .info-card,
  .privacy-card,
  .feature-card,
  .capability-card,
  .showcase-block,
  .contact-card {
    padding: 22px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .showcase-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .showcase-grid {
    display: flex;
    gap: 14px;
    overflow-x: auto;
    padding-bottom: 4px;
    scroll-snap-type: x proximity;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }

  .showcase-grid::-webkit-scrollbar {
    display: none;
  }

  .screenshot-card {
    flex: 0 0 78vw;
    min-width: 78vw;
    padding: 10px;
    scroll-snap-align: start;
  }

  .button {
    width: 100%;
  }
}