:root {
  --bg: #0d1824;
  --bg-deep: #09121c;
  --surface: rgba(255, 255, 255, 0.05);
  --surface-strong: rgba(11, 22, 35, 0.82);
  --surface-slate: rgba(12, 24, 38, 0.9);
  --surface-steel: rgba(15, 29, 45, 0.94);
  --surface-accent: rgba(18, 38, 46, 0.94);
  --panel-border: rgba(148, 163, 184, 0.16);
  --panel-border-strong: rgba(255, 255, 255, 0.12);
  --paper: #f4f7fa;
  --paper-strong: #fcfdff;
  --ink-900: #0f172a;
  --ink-700: #334155;
  --ink-500: #64748b;
  --text: #f8fafc;
  --text-soft: #cbd5e1;
  --text-muted: #94a3b8;
  --accent-green: #69d39e;
  --accent-green-strong: #3dbb7c;
  --accent-cyan: #63b3de;
  --shadow-xl: 0 32px 100px rgba(2, 6, 23, 0.45);
  --shadow-lg: 0 24px 60px rgba(2, 6, 23, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background: var(--bg-deep);
  font-family: "Avenir Next", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

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

h1,
h2,
h3,
p,
ul {
  margin: 0;
}

.page-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 12% 10%, rgba(105, 211, 158, 0.16), transparent 24%),
    radial-gradient(circle at 88% 16%, rgba(99, 179, 222, 0.12), transparent 28%),
    linear-gradient(180deg, #0d1824 0%, #0d1725 42%, #08111b 100%);
}

.site-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 18px 0 52px;
}

.topbar,
.journey-section,
.capabilities-section,
.download-section,
.support-section,
.consult-section,
.quick-start-panel,
.release-strip {
  border: 1px solid var(--panel-border);
  border-radius: 28px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 18px;
  background: rgba(3, 8, 22, 0.72);
  backdrop-filter: blur(18px);
}

.brand,
.nav-links {
  display: flex;
  align-items: center;
}

.brand {
  gap: 12px;
  min-width: 0;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.brand-icon {
  width: 96px;
  height: 44px;
  object-fit: contain;
}

.nav-links {
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav-links a {
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--text-muted);
  font-size: 14px;
  transition: color 180ms ease, background 180ms ease;
}

.nav-links a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(340px, 440px);
  gap: 32px;
  align-items: center;
  padding: 56px 0 28px;
}

.hero-copy {
  max-width: 710px;
}

.eyebrow,
.section-kicker,
.strip-label,
.journey-card span,
.capability-card span,
.tip-card span,
.panel-kicker {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.eyebrow,
.section-kicker {
  color: #b9ffd0;
  border: 1px solid rgba(74, 222, 128, 0.24);
  background: rgba(74, 222, 128, 0.12);
}

.eyebrow.muted {
  color: #8ce7ff;
  border: 1px solid rgba(56, 189, 248, 0.2);
  background: rgba(56, 189, 248, 0.08);
}

.hero h1 {
  margin-top: 24px;
  font-size: clamp(40px, 5.9vw, 72px);
  line-height: 1.02;
  letter-spacing: -0.03em;
}

.hero-copy p,
.section-title p {
  margin-top: 20px;
  color: var(--text-soft);
  font-size: 18px;
  line-height: 1.85;
}

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

.button,
.download-action,
.quick-start-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  border-radius: 16px;
  font-size: 15px;
  font-weight: 800;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.button:hover,
.download-action:hover,
.quick-start-action:hover {
  transform: translateY(-1px);
}

.button {
  padding: 0 18px;
}

.button.primary,
.quick-start-action,
.download-action {
  color: #04210f;
  background: linear-gradient(135deg, #7cddb0, #47c988);
  box-shadow: 0 14px 24px rgba(61, 187, 124, 0.14);
}

.button.ghost,
.quick-start-action.is-consult,
.download-action.is-consult {
  color: var(--text);
  border: 1px solid var(--panel-border);
  background: rgba(255, 255, 255, 0.045);
  box-shadow: none;
}

.quick-start-panel {
  padding: 24px;
  background: var(--surface-strong);
  box-shadow: var(--shadow-xl);
  backdrop-filter: blur(22px);
}

.panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.panel-kicker {
  padding: 0;
  border: 0;
  min-height: auto;
  background: transparent;
  color: #9ef7c0;
}

.panel-head h2 {
  margin-top: 8px;
  font-size: 32px;
  line-height: 1.08;
}

.panel-summary {
  margin-top: 16px;
  color: var(--text-soft);
  font-size: 15px;
  line-height: 1.8;
}

.status-dot {
  width: 14px;
  height: 14px;
  flex: 0 0 auto;
  border-radius: 999px;
  background: var(--accent-green-strong);
  box-shadow: 0 0 0 10px rgba(105, 211, 158, 0.1);
}

.quick-start-grid,
.download-grid,
.journey-grid,
.capabilities-grid,
.tips-grid {
  display: grid;
  gap: 18px;
}

.quick-start-grid,
.download-grid,
.tips-grid {
  margin-top: 24px;
}

.quick-start-card,
.download-card,
.journey-card,
.capability-card,
.tip-card,
.consult-card {
  border-radius: 24px;
}

.quick-start-card,
.download-card {
  padding: 22px;
  border: 1px solid var(--panel-border-strong);
  background: linear-gradient(180deg, rgba(16, 29, 43, 0.92), rgba(9, 18, 30, 0.96));
}

.quick-start-card.is-preferred,
.download-card.is-preferred {
  color: var(--text);
  border-color: rgba(105, 211, 158, 0.2);
  background:
    radial-gradient(circle at top right, rgba(105, 211, 158, 0.18), transparent 34%),
    linear-gradient(160deg, rgba(18, 47, 49, 0.96), rgba(15, 34, 49, 0.97) 58%, rgba(10, 20, 33, 0.98));
  box-shadow: 0 18px 46px rgba(2, 6, 23, 0.28);
}

.quick-start-card.is-unavailable,
.download-card.is-unavailable {
  background: linear-gradient(180deg, rgba(12, 20, 31, 0.82), rgba(7, 13, 23, 0.9));
}

.quick-start-card.is-preferred.is-unavailable,
.download-card.is-preferred.is-unavailable {
  color: var(--text-soft);
  border-color: rgba(148, 163, 184, 0.18);
  background:
    radial-gradient(circle at top right, rgba(99, 179, 222, 0.12), transparent 34%),
    linear-gradient(180deg, rgba(18, 28, 40, 0.94), rgba(9, 16, 27, 0.97));
}

.download-card.is-unavailable {
  border-color: rgba(148, 163, 184, 0.2);
}

.quick-start-head,
.package-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.package-token,
.package-format {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  border-radius: 14px;
  font-size: 12px;
  font-weight: 900;
}

.package-token {
  min-width: 50px;
  color: #063117;
  background: #8ee4b4;
}

.package-format {
  padding: 0 14px;
  color: var(--text-soft);
  border: 1px solid var(--panel-border-strong);
  background: rgba(255, 255, 255, 0.04);
}

.quick-start-card.is-preferred .package-format,
.download-card.is-preferred .package-format {
  color: var(--text-soft);
  border-color: rgba(148, 163, 184, 0.2);
  background: rgba(255, 255, 255, 0.06);
}

.quick-start-card h3,
.download-card h3,
.journey-card h3,
.capability-card h3,
.tip-card h3,
.consult-copy h3 {
  margin-top: 18px;
  font-size: 26px;
  line-height: 1.18;
}

.quick-start-card p,
.download-card p,
.journey-card p,
.capability-card p,
.tip-card p,
.consult-copy p,
.consult-note {
  margin-top: 10px;
  color: var(--text-soft);
  line-height: 1.78;
}

.quick-start-card.is-preferred p,
.quick-start-card.is-preferred .package-meta,
.download-card.is-preferred p,
.download-card.is-preferred .package-meta,
.download-card.is-preferred .package-support {
  color: var(--text-soft);
}

.quick-start-card.is-preferred.is-unavailable p,
.quick-start-card.is-preferred.is-unavailable .package-meta,
.download-card.is-preferred.is-unavailable p,
.download-card.is-preferred.is-unavailable .package-meta,
.download-card.is-preferred.is-unavailable .package-support {
  color: var(--text-muted);
}

.package-meta,
.package-support {
  margin-top: 16px;
  font-size: 14px;
}

.package-support {
  color: var(--text-muted);
}

.quick-start-action,
.download-action {
  width: 100%;
  margin-top: 22px;
}

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

.section-title h2 {
  margin-top: 16px;
  font-size: clamp(32px, 4vw, 52px);
  line-height: 1.08;
}

.journey-section,
.capabilities-section,
.download-section,
.support-section,
.consult-section {
  margin-top: 28px;
  padding: 30px;
  background: rgba(10, 20, 32, 0.5);
  backdrop-filter: blur(12px);
}

.journey-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 28px;
}

.journey-card,
.capability-card {
  padding: 24px;
  border: 1px solid var(--panel-border);
  background: rgba(255, 255, 255, 0.04);
}

.journey-card span,
.capability-card span,
.tip-card span {
  padding: 0;
  min-height: auto;
  border: 0;
  background: transparent;
}

.journey-card span {
  color: #9ef7c0;
}

.capabilities-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 28px;
}

.capability-card span,
.tip-card span {
  color: var(--accent-cyan);
}

.download-section {
  background:
    radial-gradient(circle at top right, rgba(99, 179, 222, 0.08), transparent 28%),
    linear-gradient(180deg, rgba(10, 19, 31, 0.88), rgba(6, 14, 24, 0.96));
  box-shadow: 0 28px 64px rgba(2, 6, 23, 0.26);
}

.download-section .section-title p,
.download-section .strip-label,
.download-card .package-support {
  color: var(--text-soft);
}

.download-section .download-action.is-consult {
  color: var(--text);
  border-color: rgba(148, 163, 184, 0.22);
  background: rgba(255, 255, 255, 0.06);
}

.release-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 28px;
  padding: 20px;
  background: linear-gradient(180deg, rgba(18, 31, 45, 0.9), rgba(11, 20, 32, 0.96));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.release-strip > div {
  display: grid;
  gap: 8px;
}

.strip-label {
  padding: 0;
  min-height: auto;
  border: 0;
  background: transparent;
  color: var(--ink-500);
}

.release-strip strong {
  font-size: 18px;
  line-height: 1.4;
  color: var(--text);
}

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

.download-card {
  border-color: rgba(148, 163, 184, 0.22);
  background: linear-gradient(180deg, rgba(17, 30, 45, 0.95), rgba(10, 19, 31, 0.98));
}

.download-card.is-preferred {
  box-shadow: 0 22px 54px rgba(2, 6, 23, 0.3);
}

.support-section {
  background:
    radial-gradient(circle at top left, rgba(105, 211, 158, 0.08), transparent 22%),
    linear-gradient(180deg, rgba(6, 15, 27, 0.78), rgba(5, 12, 23, 0.92));
}

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

.tip-card {
  padding: 26px;
  border: 1px solid var(--panel-border);
  background: linear-gradient(180deg, rgba(18, 31, 45, 0.92), rgba(10, 19, 31, 0.97));
  color: var(--text);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.quick-start-action.is-disabled,
.download-action.is-disabled {
  color: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(148, 163, 184, 0.16);
  background: rgba(148, 163, 184, 0.12);
  box-shadow: none;
  pointer-events: none;
  cursor: not-allowed;
}

.quick-start-card.is-preferred .quick-start-action.is-disabled,
.download-card.is-preferred .download-action.is-disabled {
  color: rgba(226, 232, 240, 0.56);
  border-color: rgba(148, 163, 184, 0.14);
  background: rgba(15, 23, 42, 0.22);
}

.tip-card p {
  color: var(--text-soft);
}

.consult-layout {
  margin-top: 28px;
}

.consult-card {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) 280px;
  gap: 24px;
  padding: 28px;
  border: 1px solid var(--panel-border);
  background: linear-gradient(140deg, rgba(7, 18, 31, 0.92), rgba(10, 24, 41, 0.82));
  box-shadow: var(--shadow-xl);
}

.consult-copy p,
.consult-note {
  color: var(--text-soft);
}

.consult-points {
  margin-top: 18px;
  padding-left: 18px;
  color: var(--text);
  line-height: 1.9;
}

.consult-aside {
  display: grid;
  gap: 14px;
  align-content: start;
}

.consult-qr {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 20px;
  border: 1px solid var(--panel-border);
  background: rgba(255, 255, 255, 0.04);
  object-fit: cover;
}

.consult-qr--empty {
  display: grid;
  place-items: center;
  padding: 20px;
  color: var(--text-muted);
  text-align: center;
  font-size: 14px;
  line-height: 1.8;
}

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 32px;
  padding: 0 4px;
  color: var(--text-muted);
  font-size: 14px;
}

@media (max-width: 1080px) {
  .hero {
    grid-template-columns: 1fr;
    align-items: start;
  }

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

  .capabilities-grid,
  .download-grid,
  .tips-grid {
    grid-template-columns: 1fr;
  }

  .consult-card {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 820px) {
  .site-shell {
    width: min(100% - 24px, 1180px);
    padding-top: 12px;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
    padding: 16px;
  }

  .nav-links {
    width: 100%;
    justify-content: space-between;
  }

  .nav-links a {
    flex: 1;
    text-align: center;
  }

  .hero {
    padding-top: 34px;
  }

  .hero h1 {
    font-size: clamp(34px, 12vw, 58px);
  }

  .hero-copy p,
  .section-title p {
    font-size: 16px;
  }

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

  .button {
    width: 100%;
  }

  .journey-grid {
    grid-template-columns: 1fr;
  }

  .release-strip {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 540px) {
  .brand {
    font-size: 18px;
  }

  .brand-icon {
    width: 84px;
    height: 38px;
  }

  .quick-start-panel,
  .journey-section,
  .capabilities-section,
  .download-section,
  .support-section,
  .consult-section,
  .consult-card,
  .quick-start-card,
  .download-card,
  .journey-card,
  .capability-card,
  .tip-card,
  .release-strip {
    border-radius: 22px;
  }

  .journey-section,
  .capabilities-section,
  .download-section,
  .support-section,
  .consult-section {
    padding: 22px;
  }

  .quick-start-card h3,
  .download-card h3,
  .journey-card h3,
  .capability-card h3,
  .tip-card h3,
  .consult-copy h3 {
    font-size: 22px;
  }

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