:root {
  --paper: #f7f0e6;
  --paper-deep: #ead7c3;
  --paper-soft: #fff8f1;
  --ink: #161311;
  --ink-soft: #554c45;
  --ink-muted: #86796f;
  --accent: #d5543f;
  --accent-deep: #a63c2c;
  --teal: #1f7a74;
  --line: rgba(22, 19, 17, 0.12);
  --shadow-soft: 0 24px 60px rgba(31, 20, 15, 0.12);
  --shadow-card: 0 18px 40px rgba(31, 20, 15, 0.1);
  --radius-xl: 36px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --content-width: 1200px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(213, 84, 63, 0.18), transparent 28%),
    radial-gradient(circle at top right, rgba(31, 122, 116, 0.12), transparent 30%),
    linear-gradient(180deg, #fbf5ee 0%, var(--paper) 48%, #f4ebdf 100%);
  font-family:
    "Avenir Next",
    "PingFang SC",
    "Hiragino Sans GB",
    "Noto Sans CJK SC",
    sans-serif;
  line-height: 1.6;
}

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

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

.site-shell {
  width: min(calc(100% - 32px), var(--content-width));
  margin: 0 auto;
  padding-bottom: 56px;
}

.site-header {
  position: sticky;
  top: 12px;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: 18px;
  padding: 14px 18px;
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: 999px;
  background: rgba(255, 249, 241, 0.78);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow-card);
}

.site-header-subpage {
  position: static;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand img {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  box-shadow: 0 10px 26px rgba(213, 84, 63, 0.18);
}

.brand strong {
  display: block;
  font-size: 1.1rem;
  letter-spacing: 0.02em;
}

.brand span {
  display: block;
  color: var(--ink-muted);
  font-size: 0.88rem;
}

.site-nav {
  display: inline-flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.site-nav a {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--accent-deep);
}

.site-nav-inline {
  gap: 14px;
}

.menu-toggle {
  display: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  padding: 10px 14px;
  color: var(--ink);
  font: inherit;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.92fr);
  gap: 44px;
  align-items: center;
  padding: 82px 0 52px;
}

.eyebrow,
.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 999px;
  padding: 7px 12px;
  background: rgba(213, 84, 63, 0.08);
  color: var(--accent-deep);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1,
.section-heading h1,
.section-heading h2 {
  margin: 18px 0 0;
  font-family:
    "Iowan Old Style",
    "Palatino Linotype",
    "Songti SC",
    "Noto Serif SC",
    serif;
  line-height: 1.03;
  letter-spacing: -0.03em;
}

.hero h1 {
  font-size: clamp(3rem, 6vw, 5.6rem);
  max-width: 10ch;
}

.hero-lead,
.section-heading p,
.feature-panel p,
.advantage-card p,
.scene-card p,
.highlight-card p,
.trust-copy p,
.download-card p,
.faq-item p,
.policy-card p {
  color: var(--ink-soft);
  font-size: 1.04rem;
}

.hero-actions,
.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 52px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  transition:
    transform 180ms ease,
    background-color 180ms ease,
    border-color 180ms ease,
    color 180ms ease;
}

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

.button-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 16px 28px rgba(213, 84, 63, 0.24);
}

.button-primary:hover,
.button-primary:focus-visible {
  background: var(--accent-deep);
}

.button-secondary {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink);
}

.hero-status {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(22, 19, 17, 0.05);
  color: var(--ink-soft);
  font-size: 0.93rem;
}

.hero-visual {
  position: relative;
  min-height: 660px;
}

.hero-orbit {
  position: absolute;
  inset: 6% 4% 18% 8%;
  border: 1px dashed rgba(22, 19, 17, 0.12);
  border-radius: 48px;
  background:
    radial-gradient(circle at 20% 18%, rgba(213, 84, 63, 0.24), transparent 26%),
    radial-gradient(circle at 78% 74%, rgba(31, 122, 116, 0.18), transparent 24%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.5), rgba(255, 255, 255, 0.18));
  filter: blur(0.2px);
}

.phone-cluster {
  position: absolute;
  inset: 0;
}

.phone-card {
  position: absolute;
  width: min(100%, 360px);
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: 34px;
  background: rgba(255, 248, 241, 0.86);
  box-shadow: var(--shadow-soft);
}

.phone-card-main {
  top: 36px;
  left: 0;
  transform: rotate(-5deg);
}

.phone-card-side {
  right: 0;
  bottom: 24px;
  transform: rotate(7deg);
}

.phone-topline {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--teal);
}

.dot.accent {
  background: var(--accent);
}

.phone-card img {
  width: 100%;
  border-radius: 24px;
  border: 1px solid rgba(22, 19, 17, 0.08);
}

.proof-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 10px;
}

.proof-strip > div,
.advantage-card,
.feature-panel,
.scene-card,
.trust-card,
.highlight-card,
.download-card,
.policy-card,
.faq-item {
  border: 1px solid rgba(22, 19, 17, 0.08);
  border-radius: var(--radius-lg);
  background: rgba(255, 250, 244, 0.88);
  box-shadow: var(--shadow-card);
}

.proof-strip > div {
  padding: 18px 18px 16px;
}

.proof-strip strong {
  display: block;
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.proof-strip span {
  display: block;
  color: var(--ink-muted);
  font-size: 0.94rem;
}

.section {
  padding: 92px 0 0;
}

.section-contrast {
  margin-top: 24px;
  padding: 92px 28px 10px;
  border-radius: var(--radius-xl);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.55), rgba(255, 255, 255, 0.16)),
    linear-gradient(135deg, rgba(245, 233, 221, 0.82), rgba(239, 244, 242, 0.82));
  border: 1px solid rgba(22, 19, 17, 0.08);
}

.section-trust,
.section-highlight,
.section-download {
  margin-top: 28px;
}

.section-heading {
  max-width: 760px;
}

.section-heading h2,
.section-heading h1 {
  font-size: clamp(2.1rem, 4vw, 4rem);
}

.advantage-grid,
.scene-grid,
.highlight-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 28px;
}

.advantage-card,
.scene-card,
.highlight-card {
  padding: 24px;
}

.advantage-card h3,
.scene-card h3,
.highlight-card h3,
.feature-panel h3,
.policy-card h2 {
  margin: 0;
  font-size: 1.28rem;
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 28px;
}

.feature-panel {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 18px;
  padding: 24px;
}

.feature-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(213, 84, 63, 0.14), rgba(213, 84, 63, 0.04));
  color: var(--accent-deep);
  font-weight: 700;
  font-size: 1.05rem;
}

.feature-bullets,
.policy-list {
  margin: 16px 0 0;
  padding-left: 18px;
  color: var(--ink-soft);
}

.feature-bullets li,
.policy-list li {
  margin-bottom: 8px;
}

.scene-emoji {
  display: inline-flex;
  width: 58px;
  height: 58px;
  align-items: center;
  justify-content: center;
  border-radius: 20px;
  margin-bottom: 16px;
  background: rgba(22, 19, 17, 0.05);
  font-size: 1.7rem;
}

.trust-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 20px;
  margin-top: 30px;
}

.trust-points {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.trust-points > div {
  padding: 18px 20px;
  border-radius: 20px;
  border: 1px solid rgba(22, 19, 17, 0.08);
  background: rgba(255, 255, 255, 0.52);
}

.trust-points strong,
.trust-sample-header strong {
  display: block;
  margin-bottom: 4px;
}

.trust-points span,
.trust-sample-block p {
  color: var(--ink-soft);
}

.trust-card {
  padding: 22px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.8), rgba(247, 240, 230, 0.88)),
    rgba(255, 255, 255, 0.7);
}

.trust-sample-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.trust-sample-header span,
.trust-sample-block small {
  color: var(--ink-muted);
}

.trust-sample-block {
  padding: 18px 0;
  border-bottom: 1px solid rgba(22, 19, 17, 0.08);
}

.trust-sample-block:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.download-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px;
  background:
    radial-gradient(circle at right top, rgba(213, 84, 63, 0.14), transparent 26%),
    linear-gradient(135deg, rgba(255, 248, 241, 0.9), rgba(241, 248, 247, 0.88));
}

.faq-list {
  display: grid;
  gap: 12px;
  margin-top: 26px;
}

.faq-item {
  padding: 22px 24px;
}

.faq-item summary {
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  font-size: 1.08rem;
}

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

.faq-item p {
  margin: 14px 0 0;
}

.site-footer {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  margin-top: 90px;
  padding: 26px 0 10px;
  border-top: 1px solid rgba(22, 19, 17, 0.08);
}

.site-footer p {
  margin: 10px 0 0;
  max-width: 440px;
  color: var(--ink-muted);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 18px;
  color: var(--ink-soft);
}

.subpage-body {
  background:
    radial-gradient(circle at top left, rgba(31, 122, 116, 0.12), transparent 26%),
    radial-gradient(circle at top right, rgba(213, 84, 63, 0.14), transparent 26%),
    linear-gradient(180deg, #fbf5ee 0%, var(--paper) 52%, #f2e8db 100%);
}

.policy-page {
  max-width: 900px;
  margin: 0 auto;
  padding: 72px 0 32px;
}

.policy-card {
  padding: 26px;
  margin-top: 16px;
}

.policy-card a {
  color: var(--accent-deep);
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 700ms ease,
    transform 700ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1080px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-top: 60px;
  }

  .hero h1 {
    max-width: 12ch;
  }

  .hero-visual {
    min-height: 620px;
  }

  .proof-strip,
  .advantage-grid,
  .scene-grid,
  .highlight-grid,
  .feature-list,
  .trust-layout {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .download-card,
  .site-footer {
    flex-direction: column;
  }
}

@media (max-width: 760px) {
  .site-shell {
    width: min(calc(100% - 20px), var(--content-width));
  }

  .site-header {
    flex-wrap: wrap;
    border-radius: 28px;
  }

  .menu-toggle {
    display: inline-flex;
    align-items: center;
  }

  .site-nav {
    display: none;
    width: 100%;
    padding-top: 8px;
    border-top: 1px solid rgba(22, 19, 17, 0.08);
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav-inline {
    display: inline-flex;
    width: auto;
    padding-top: 0;
    border-top: 0;
    flex-direction: row;
  }

  .hero {
    padding-top: 42px;
  }

  .hero h1 {
    max-width: none;
  }

  .hero-visual {
    min-height: 540px;
  }

  .phone-card {
    width: min(100%, 280px);
  }

  .phone-card-main {
    top: 24px;
    left: 10px;
  }

  .phone-card-side {
    right: 8px;
    bottom: 18px;
  }

  .proof-strip,
  .advantage-grid,
  .scene-grid,
  .highlight-grid,
  .feature-list,
  .trust-layout {
    grid-template-columns: 1fr;
  }

  .feature-panel {
    grid-template-columns: 1fr;
  }

  .download-card,
  .policy-card,
  .faq-item {
    padding: 22px;
  }

  .section {
    padding-top: 76px;
  }

  .section-contrast {
    padding: 76px 18px 10px;
  }
}