:root {
  --bg: #06131f;
  --panel: rgba(8, 29, 45, 0.7);
  --panel-border: rgba(159, 214, 255, 0.18);
  --text: #ecf6ff;
  --muted: #9db5c6;
  --accent: #5dd2ff;
  --accent-strong: #13a7ff;
  --shadow: 0 24px 80px rgba(0, 8, 18, 0.38);
  --max-width: 1180px;
  --radius-xl: 32px;
  --radius-lg: 24px;
  --transition: 180ms ease;
  --font-sans: "Avenir Next", "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: var(--font-sans);
  background:
    radial-gradient(circle at top left, rgba(54, 156, 255, 0.18), transparent 28%),
    radial-gradient(circle at top right, rgba(50, 203, 255, 0.15), transparent 24%),
    linear-gradient(180deg, #05101a 0%, #061724 44%, #0a2133 100%);
}

body::before,
body::after {
  content: "";
  position: fixed;
  pointer-events: none;
  z-index: -1;
  border-radius: 999px;
  filter: blur(18px);
}

body::before {
  top: 120px;
  right: 12vw;
  width: 280px;
  height: 280px;
  background: rgba(22, 149, 255, 0.18);
}

body::after {
  bottom: 120px;
  left: 10vw;
  width: 320px;
  height: 320px;
  background: rgba(71, 232, 255, 0.11);
}

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

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

.page-shell {
  width: min(calc(100% - 40px), var(--max-width));
  margin: 0 auto;
  padding: 28px 0 44px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 18px;
  position: sticky;
  top: 16px;
  z-index: 20;
  background: rgba(6, 20, 31, 0.56);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(194, 235, 255, 0.08);
  border-radius: 26px;
  box-shadow: var(--shadow);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  min-width: 0;
}

.brand-mark-shell {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 78px;
  height: 78px;
  flex-shrink: 0;
  overflow: hidden;
  border-radius: 22px;
  background: rgba(248, 252, 255, 0.98);
  border: 1px solid rgba(196, 231, 255, 0.45);
  box-shadow:
    0 16px 36px rgba(0, 6, 18, 0.26),
    inset 0 1px 0 rgba(255, 255, 255, 0.88);
}

.brand-mark {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  border-radius: inherit;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-kicker {
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.brand-name {
  font-size: 1.08rem;
  font-weight: 700;
}

.header-actions {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.language-switch {
  display: inline-flex;
  align-items: center;
  padding: 4px;
  gap: 4px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.lang-button {
  border: 0;
  background: transparent;
  color: var(--muted);
  min-width: 46px;
  height: 38px;
  padding: 0 14px;
  border-radius: 999px;
  font: inherit;
  cursor: pointer;
  transition:
    background var(--transition),
    color var(--transition),
    transform var(--transition);
}

.lang-button:hover {
  color: var(--text);
}

.lang-button.is-active {
  background: linear-gradient(135deg, rgba(93, 210, 255, 0.28), rgba(19, 167, 255, 0.4));
  color: var(--text);
  transform: translateY(-1px);
}

main {
  display: grid;
  gap: 32px;
  margin-top: 30px;
}

.hero-section,
.content-section,
.policy-section,
.privacy-hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(11, 32, 49, 0.88), rgba(7, 23, 36, 0.88));
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
}

.hero-section::before,
.content-section::before,
.policy-section::before,
.privacy-hero::before {
  content: "";
  position: absolute;
  inset: -10% auto auto -10%;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(93, 210, 255, 0.14), transparent 70%);
  pointer-events: none;
}

.hero-section {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(320px, 0.82fr);
  gap: 34px;
  padding: 52px;
  min-height: 72vh;
}

.hero-copy,
.hero-panel {
  position: relative;
  z-index: 1;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 0.82rem;
}

.hero-copy h1,
.privacy-hero h1 {
  margin: 0;
  font-size: clamp(2.6rem, 4vw, 5rem);
  line-height: 1.02;
  letter-spacing: -0.04em;
}

.hero-lead,
.hero-sublead,
.section-lead {
  margin: 0;
  max-width: 64ch;
  color: var(--muted);
  font-size: 1.04rem;
  line-height: 1.8;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 8px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 24px;
  border-radius: 999px;
  font-weight: 600;
  transition:
    transform var(--transition),
    border-color var(--transition),
    background var(--transition);
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: #042236;
  background: linear-gradient(135deg, #9ce8ff, #5dd2ff 45%, #13a7ff 100%);
}

.button-download {
  min-height: 42px;
  padding: 0 18px;
  color: #042236;
  background: linear-gradient(135deg, #d9f7ff, #8be3ff 45%, #45c7ff 100%);
  box-shadow: 0 12px 24px rgba(18, 155, 255, 0.18);
}

.button-secondary {
  border: 1px solid rgba(157, 215, 255, 0.2);
  background: rgba(255, 255, 255, 0.03);
}

.hero-panel {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 18px;
}

.glass-card,
.feature-card,
.contact-card {
  background: var(--panel);
  border: 1px solid rgba(194, 235, 255, 0.08);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.glass-card {
  border-radius: var(--radius-lg);
  padding: 26px;
}

.highlight-card h2 {
  margin: 10px 0 0;
  font-size: clamp(1.6rem, 2vw, 2.35rem);
  line-height: 1.2;
}

.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 54px;
  height: 54px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(93, 210, 255, 0.18), rgba(19, 167, 255, 0.28));
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.card-icon img {
  width: 26px;
  height: 26px;
}

.card-label,
.contact-label {
  margin: 14px 0 0;
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

.stats-grid,
.feature-grid {
  display: grid;
  gap: 18px;
}

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

.stat-copy {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.8;
}

.content-section,
.policy-section,
.privacy-hero {
  padding: 40px;
}

.section-heading {
  display: grid;
  gap: 12px;
  margin-bottom: 26px;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(2rem, 3vw, 3rem);
  letter-spacing: -0.03em;
}

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

.feature-card {
  padding: 26px;
  border-radius: var(--radius-lg);
}

.feature-card h3 {
  margin: 0 0 14px;
  font-size: 1.18rem;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.85;
}

.contact-section {
  padding-bottom: 46px;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 24px;
  border-radius: var(--radius-lg);
  width: min(100%, 560px);
}

.contact-copy {
  display: grid;
  gap: 8px;
}

.contact-value {
  font-size: 1.3rem;
  font-weight: 700;
}

.privacy-main {
  gap: 24px;
}

.privacy-hero {
  padding-top: 48px;
  padding-bottom: 34px;
}

.policy-content {
  display: grid;
  gap: 16px;
}

.policy-content p {
  margin: 0;
  color: var(--muted);
  line-height: 1.9;
  font-size: 0.98rem;
}

.policy-content p.is-heading {
  color: var(--text);
  font-size: 1.12rem;
  font-weight: 700;
  margin-top: 8px;
}

.site-footer {
  margin-top: 28px;
  padding: 22px 30px;
  border-radius: 28px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(5, 18, 28, 0.78);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
}

.footer-brand {
  margin: 0;
  color: var(--text);
  font-weight: 600;
}

.footer-bottom {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 0;
}

.record-link {
  color: var(--muted);
  font-size: 0.95rem;
}

.record-link:hover {
  color: var(--text);
}

@media (max-width: 980px) {
  .site-header {
    border-radius: 24px;
    padding: 18px;
  }

  .hero-section {
    grid-template-columns: 1fr;
    min-height: unset;
    padding: 38px 28px;
  }

  .content-section,
  .policy-section,
  .privacy-hero {
    padding: 30px 22px;
  }

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

@media (max-width: 640px) {
  .page-shell {
    width: min(calc(100% - 24px), var(--max-width));
    padding-top: 16px;
  }

  .site-header {
    gap: 14px;
    top: 10px;
  }

  .brand {
    min-width: 0;
  }

  .header-actions {
    gap: 8px;
  }

  .brand-mark-shell {
    width: 66px;
    height: 66px;
    border-radius: 18px;
  }

  .header-actions {
    margin-left: auto;
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .hero-copy h1,
  .privacy-hero h1 {
    font-size: 2.25rem;
  }

  .hero-actions .button {
    width: 100%;
  }

  .contact-card {
    width: 100%;
    align-items: flex-start;
  }

  .contact-value {
    font-size: 1.08rem;
    word-break: break-all;
  }

  .site-footer {
    padding: 22px 18px;
  }
}