:root {
  --bg: #08121d;
  --bg-top: #0d1c2c;
  --panel: rgba(12, 24, 37, 0.76);
  --panel-strong: rgba(14, 27, 40, 0.88);
  --panel-border: rgba(255, 255, 255, 0.08);
  --text: #eef4ff;
  --muted: #a9b8cb;
  --soft: #d7e6f7;
  --brand: #53d4ff;
  --brand-deep: #2f7dff;
  --accent: #ffb24a;
  --accent-soft: rgba(255, 178, 74, 0.16);
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 16px;
  --max-width: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(83, 212, 255, 0.16), transparent 28%),
    radial-gradient(circle at top right, rgba(255, 178, 74, 0.1), transparent 24%),
    linear-gradient(180deg, var(--bg-top) 0%, var(--bg) 50%, #070e17 100%);
}

body.page-privacy {
  background: linear-gradient(180deg, #0d1724 0%, #0b121b 100%);
}

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

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

.shell {
  width: min(calc(100% - 32px), var(--max-width));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(5, 11, 18, 0.58);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.topbar-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

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

.brand-mark {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.28);
}

.brand-copy strong {
  display: block;
  font-size: 18px;
  line-height: 1.15;
  white-space: nowrap;
}

.brand-copy span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
  white-space: nowrap;
}

.top-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  margin-left: auto;
  flex-shrink: 0;
}

.nav-link {
  color: var(--muted);
  font-size: 14px;
  transition: color 0.2s ease;
}

.nav-link:hover,
.nav-link.current {
  color: var(--text);
}

.lang-select-wrap {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.lang-select {
  min-width: 112px;
  min-height: 38px;
  padding: 0 38px 0 14px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.03));
  color: var(--text);
  font-size: 13px;
  font-family: inherit;
  outline: none;
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.lang-select option {
  color: #102133;
  background-color: #f4f7fc;
}

.lang-select-wrap::after {
  content: "▾";
  position: absolute;
  right: 14px;
  pointer-events: none;
  color: var(--muted);
  font-size: 12px;
}

.hero {
  padding: 62px 0 28px;
}

.hero h1 {
  margin: 0 0 16px;
  max-width: 760px;
  font-size: clamp(42px, 8vw, 80px);
  line-height: 0.98;
  letter-spacing: -0.05em;
}

.hero-lead {
  max-width: 760px;
  margin: 0;
  color: var(--soft);
  font-size: 19px;
  line-height: 1.78;
}

.hero-cta {
  margin-top: 28px;
}

.primary-cta {
  min-width: 176px;
  min-height: 56px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  border-radius: 999px;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(180deg, var(--brand) 0%, var(--brand-deep) 100%);
  box-shadow: 0 18px 42px rgba(47, 125, 255, 0.28);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.primary-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 22px 48px rgba(47, 125, 255, 0.34);
}

.section {
  padding: 42px 0;
}

.section h2,
.policy-card h2 {
  margin: 0 0 12px;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.08;
}

.section-intro,
.privacy-lead {
  max-width: 760px;
  margin: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 26px;
}

.feature-card,
.gallery-card,
.policy-card {
  border-radius: var(--radius-lg);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.feature-card {
  padding: 22px;
}

.feature-mark {
  width: 46px;
  height: 46px;
  margin-bottom: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 800;
}

.feature-card strong {
  display: block;
  margin-bottom: 10px;
  font-size: 18px;
}

.feature-card p,
.policy-card p,
.policy-card li {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.gallery-wrap {
  margin-top: 26px;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(220px, 1fr));
  gap: 18px;
  overflow-x: auto;
  padding-bottom: 6px;
  scroll-snap-type: x proximity;
}

.gallery-card {
  padding: 14px;
  scroll-snap-align: start;
}

.gallery-card img {
  width: 100%;
  aspect-ratio: 1260 / 2736;
  object-fit: cover;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.gallery-card span {
  display: block;
  padding-top: 12px;
  color: #dbe6f8;
  font-size: 14px;
}

.policy-layout {
  display: grid;
  gap: 16px;
  margin-top: 28px;
}

.policy-card {
  padding: 24px;
}

.policy-card h2 {
  font-size: 22px;
}

.policy-card ul {
  margin: 0;
  padding-left: 18px;
}

.support-line {
  margin-top: 12px;
  color: #d7e7ff;
}

.footer {
  padding: 36px 0 60px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-copy {
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 980px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .shell {
    width: min(calc(100% - 24px), var(--max-width));
  }

  .topbar-inner {
    min-height: 68px;
    gap: 12px;
    flex-wrap: nowrap;
    align-items: center;
  }

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

  .top-links {
    margin-left: auto;
    flex-wrap: nowrap;
  }

  .brand-mark {
    width: 40px;
    height: 40px;
    border-radius: 12px;
  }

  .brand-copy strong {
    font-size: 16px;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .brand-copy span {
    font-size: 12px;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .lang-select {
    min-width: 96px;
    min-height: 34px;
    padding: 0 34px 0 12px;
    font-size: 12px;
  }

  .hero {
    padding-top: 42px;
  }

  .hero h1 {
    font-size: clamp(36px, 12vw, 54px);
  }

  .hero-lead,
  .section-intro,
  .privacy-lead {
    font-size: 16px;
  }

}