:root {
  color-scheme: light;
  --bg: #f4f6ee;
  --ink: #17200e;
  --muted: #66705b;
  --line: #dce5cf;
  --panel: #fffefa;
  --panel-strong: #f8fbf0;
  --brand: #c8ff68;
  --brand-deep: #1d2a0f;
  --accent: #63d2ba;
  --danger: #d95d5d;
  --shadow: 0 24px 70px rgba(24, 33, 14, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(120deg, rgba(200, 255, 104, 0.2), transparent 35%),
    linear-gradient(180deg, #fbfcf5 0%, var(--bg) 48%, #eef3e3 100%);
  color: var(--ink);
  font-family:
    "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

a {
  color: inherit;
}

.site-header,
.site-footer,
.hero,
.story-section,
.feature-band,
.capability-section,
.roadmap-section,
.download-section,
.contact-section,
.poll-shell {
  width: min(1120px, calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 0;
}

.brand,
.site-nav {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand {
  text-decoration: none;
  font-weight: 900;
  letter-spacing: 0;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 12px;
  background: var(--brand-deep);
  color: var(--brand);
}

.site-nav a {
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(320px, 0.78fr);
  align-items: center;
  gap: 56px;
  min-height: calc(100vh - 116px);
  padding: 34px 0 74px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--brand-deep);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  max-width: 680px;
  margin-bottom: 22px;
  font-size: clamp(44px, 8vw, 86px);
  line-height: 0.98;
  letter-spacing: 0;
}

.lead {
  max-width: 620px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

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

.hero-points span {
  border: 1px solid rgba(29, 42, 15, 0.12);
  border-radius: 999px;
  padding: 8px 12px;
  background: rgba(255, 255, 255, 0.62);
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 0 20px;
  font-weight: 800;
  text-decoration: none;
}

.button.primary {
  border-color: #daf3a0;
  background: var(--brand);
}

.button.secondary {
  background: rgba(255, 255, 255, 0.72);
}

.phone-preview {
  position: relative;
  overflow: hidden;
  min-height: 590px;
  border: 1px solid rgba(29, 42, 15, 0.16);
  border-radius: 38px;
  padding: 24px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(249, 251, 243, 0.92)),
    radial-gradient(circle at 70% 0%, rgba(99, 210, 186, 0.32), transparent 34%);
  box-shadow: var(--shadow);
}

.phone-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--muted);
  font-size: 14px;
}

.phone-top span {
  width: 42px;
  height: 8px;
  border-radius: 999px;
  background: #dce5cf;
}

.decision-card {
  margin-top: 28px;
  border-radius: 28px;
  padding: 28px;
  background: var(--brand-deep);
  color: white;
}

.decision-card p {
  margin-bottom: 12px;
  color: rgba(255, 255, 255, 0.62);
}

.decision-card h2 {
  margin-bottom: 14px;
  font-size: 32px;
  line-height: 1.15;
}

.decision-card span {
  color: rgba(255, 255, 255, 0.76);
}

.vote-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 18px;
  border-radius: 22px;
  padding: 18px;
  background: var(--brand);
  font-weight: 900;
}

.option-list {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.option-list div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 16px;
  background: white;
}

.feature-band {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  padding: 42px 0;
}

.story-section,
.capability-section,
.roadmap-section,
.download-section {
  padding: 48px 0;
}

.section-heading {
  max-width: 780px;
  margin-bottom: 24px;
}

.section-heading h2 {
  margin-bottom: 12px;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.12;
}

.section-heading p:last-child {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.8;
}

.story-grid,
.capability-grid {
  display: grid;
  gap: 16px;
}

.story-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.capability-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.feature-band article,
.story-grid article,
.capability-grid article,
.roadmap-list article,
.download-card,
.download-list article,
.contact-section,
.poll-card {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.74);
  box-shadow: 0 16px 40px rgba(24, 33, 14, 0.06);
}

.feature-band article,
.story-grid article,
.capability-grid article {
  padding: 24px;
}

.story-grid h3,
.capability-grid h3,
.roadmap-list h3 {
  margin: 0 0 10px;
  font-size: 20px;
}

.story-grid p,
.capability-grid p,
.roadmap-list p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.7;
}

.feature-icon {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 12px;
  background: var(--brand-deep);
  color: var(--brand);
  font-weight: 900;
}

.feature-band h2,
.contact-section h2 {
  margin: 18px 0 10px;
  font-size: 24px;
  line-height: 1.25;
}

.feature-band p,
.contact-section p {
  color: var(--muted);
  line-height: 1.7;
}

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

.roadmap-list article {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 18px;
  padding: 22px;
}

.roadmap-list span {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border-radius: 16px;
  background: var(--brand-deep);
  color: var(--brand);
  font-weight: 900;
}

.download-card {
  padding: 28px;
  background:
    radial-gradient(circle at 86% 4%, rgba(200, 255, 104, 0.34), transparent 28%),
    rgba(255, 255, 255, 0.78);
}

.download-card h2 {
  margin-bottom: 12px;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.12;
}

.download-card > div > p:last-child,
.download-note {
  color: var(--muted);
  line-height: 1.75;
}

.download-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.download-list article {
  padding: 22px;
  background: rgba(255, 255, 255, 0.84);
}

.download-list h3 {
  margin: 14px 0 10px;
  font-size: 22px;
}

.download-list p {
  color: var(--muted);
  line-height: 1.7;
}

.download-list .button {
  margin-top: 10px;
}

.download-badge {
  display: inline-flex;
  border-radius: 999px;
  padding: 6px 10px;
  background: var(--brand);
  color: var(--brand-deep);
  font-size: 13px;
  font-weight: 900;
}

.download-badge.muted {
  background: var(--surfaceAlt);
  color: var(--muted);
}

.download-note {
  margin: 18px 0 0;
  font-size: 14px;
}

.download-note code {
  border-radius: 8px;
  padding: 2px 6px;
  background: rgba(29, 42, 15, 0.08);
  color: var(--brand-deep);
}

.contact-section {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 42px;
  padding: 28px;
}

.contact-mail {
  white-space: nowrap;
  color: var(--brand-deep);
  font-size: 20px;
  font-weight: 900;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding: 30px 0 42px;
  color: var(--muted);
  font-size: 14px;
}

.poll-shell {
  display: grid;
  gap: 18px;
  max-width: 760px;
  padding: 30px 0 52px;
}

.poll-card {
  padding: 24px;
}

.poll-hero {
  border-color: #2e4310;
  background: var(--brand-deep);
  color: white;
}

.poll-hero p {
  color: rgba(255, 255, 255, 0.72);
}

.status {
  color: var(--muted);
}

.status.error {
  color: var(--danger);
}

.option-button {
  display: grid;
  width: 100%;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: 18px;
  margin-bottom: 12px;
  padding: 16px;
  background: white;
  color: var(--ink);
  cursor: pointer;
  font: inherit;
  text-align: left;
}

.option-button[aria-pressed="true"] {
  border-color: #d9ebab;
  background: #f0ffd1;
}

.option-meta {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 14px;
}

.progress {
  overflow: hidden;
  height: 10px;
  border-radius: 999px;
  background: #edf3e5;
}

.progress span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--accent);
}

.field {
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 0 14px;
  background: white;
  color: var(--ink);
  font: inherit;
}

.submit-row {
  display: flex;
  gap: 12px;
  margin-top: 16px;
}

.submit-row .button {
  width: 100%;
}

.button[aria-disabled="true"],
.button:disabled {
  pointer-events: none;
  opacity: 0.54;
}

@media (max-width: 820px) {
  .site-header,
  .site-footer,
  .hero,
  .story-section,
  .feature-band,
  .capability-section,
  .roadmap-section,
  .download-section,
  .contact-section,
  .poll-shell {
    width: min(100% - 28px, 1120px);
  }

  .site-nav {
    display: none;
  }

  .hero,
  .feature-band,
  .story-grid,
  .capability-grid,
  .download-list,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .hero {
    gap: 26px;
    min-height: auto;
    padding-top: 20px;
  }

  .phone-preview {
    min-height: 480px;
    border-radius: 28px;
  }

  .contact-section {
    display: grid;
  }

  .contact-mail {
    white-space: normal;
    overflow-wrap: anywhere;
  }

  .roadmap-list article {
    grid-template-columns: 1fr;
  }
}