:root {
  color-scheme: dark;
  --bg: #0b0d10;
  --line-strong: rgba(255, 255, 255, 0.12);
  --panel: rgba(17, 19, 23, 0.94);
  --panel-strong: rgba(22, 24, 29, 0.98);
  --panel-soft: rgba(21, 23, 28, 0.92);
  --panel-hover: rgba(28, 31, 37, 0.96);
  --panel-accent: rgba(33, 37, 25, 0.8);
  --panel-accent-border: rgba(215, 255, 100, 0.18);
  --line: rgba(255, 255, 255, 0.08);
  --text: #f3f4f6;
  --muted: #a6adb8;
  --accent: #d7ff64;
  --accent-strong: #d7ff64;
  --accent-contrast: #11130b;
  --gold: #f2c879;
  --shadow: 0 24px 72px rgba(0, 0, 0, 0.34);
  --radius-xl: 22px;
  --radius-lg: 16px;
  --radius-md: 13px;
  --font-sans: "SF Pro Text", "SF Pro Display", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

html[data-theme="light"] {
  color-scheme: light;
  --bg: #eef2f5;
  --line-strong: rgba(15, 23, 42, 0.12);
  --panel: rgba(255, 255, 255, 0.94);
  --panel-strong: rgba(248, 250, 252, 0.98);
  --panel-soft: rgba(255, 255, 255, 0.92);
  --panel-hover: rgba(243, 246, 249, 0.98);
  --panel-accent: rgba(93, 122, 36, 0.14);
  --panel-accent-border: rgba(93, 122, 36, 0.24);
  --line: rgba(15, 23, 42, 0.08);
  --text: #151821;
  --muted: #667085;
  --accent: #5d7a24;
  --accent-strong: #4f681f;
  --accent-contrast: #f7faef;
  --shadow: 0 18px 36px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

html:lang(zh-CN) {
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

html:lang(ja) {
  --font-sans: "Hiragino Sans", "Yu Gothic", "Meiryo", "Noto Sans JP", sans-serif;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background:
    radial-gradient(circle at 14% 18%, color-mix(in srgb, var(--accent) 12%, transparent), transparent 22%),
    radial-gradient(circle at 86% 12%, color-mix(in srgb, var(--gold) 14%, transparent), transparent 18%),
    linear-gradient(180deg, color-mix(in srgb, var(--bg) 96%, black) 0%, var(--bg) 52%, color-mix(in srgb, var(--bg) 92%, black) 100%);
  color: var(--text);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(color-mix(in srgb, var(--line) 70%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--line) 70%, transparent) 1px, transparent 1px);
  background-size: 30px 30px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.3), transparent 84%);
}

.ambient {
  position: fixed;
  z-index: 0;
  border-radius: 999px;
  filter: blur(24px);
  opacity: 0.58;
  pointer-events: none;
}

.ambient-a {
  top: 7%;
  left: 5%;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, color-mix(in srgb, var(--accent) 20%, transparent), transparent 72%);
}

.ambient-b {
  top: 14%;
  right: 4%;
  width: 260px;
  height: 260px;
  background: radial-gradient(circle, color-mix(in srgb, var(--gold) 18%, transparent), transparent 72%);
}

.page {
  position: relative;
  z-index: 1;
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 28px;
}

.section {
  margin-bottom: 22px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: linear-gradient(180deg, color-mix(in srgb, var(--panel) 98%, transparent), color-mix(in srgb, var(--panel-strong) 100%, transparent));
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  text-decoration: none;
}

.brand-logo {
  width: 48px;
  height: 48px;
  border-radius: 16px;
  box-shadow: 0 10px 22px rgba(2, 6, 23, 0.24);
}

.brand-name {
  font-size: clamp(1.55rem, 2vw, 1.9rem);
  line-height: 1;
  font-weight: 800;
  letter-spacing: 0.11em;
}

.language-switcher {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.language-switcher-label {
  font-size: 0.82rem;
  color: var(--muted);
}

.language-switcher-select {
  min-height: 40px;
  min-width: 180px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel-soft);
  color: var(--text);
  padding: 0 14px;
  font: inherit;
  font-weight: 600;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  gap: 20px;
}

.kicker,
.eyebrow,
.panel-label,
.card-tag,
.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 5px 9px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel-strong) 92%, transparent);
  color: var(--accent);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero-copy h1,
.section-heading h2,
.panel-card h2,
.policy-card h3 {
  margin: 12px 0 0;
  line-height: 1.04;
  letter-spacing: -0.04em;
  font-weight: 700;
}

.hero-copy h1 {
  max-width: 12ch;
  font-size: clamp(2.7rem, 5vw, 4.8rem);
}

.lede,
.section-copy,
.signal-list li,
.policy-card p,
.policy-list li,
.panel-card p,
.site-footer {
  color: var(--muted);
}

.lede {
  max-width: 60ch;
  margin: 16px 0 0;
  font-size: clamp(1rem, 1.4vw, 1.08rem);
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 11px;
  margin-top: 22px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  min-height: 43px;
  padding: 0 17px;
  border-radius: 999px;
  border: 1px solid transparent;
  text-decoration: none;
  font-weight: 700;
  transition: transform 160ms ease, border-color 160ms ease, background-color 160ms ease, box-shadow 160ms ease;
}

.button::before {
  content: "";
  width: 1rem;
  height: 1rem;
  flex: 0 0 auto;
  background-color: currentColor;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none'%3E%3Cpath d='M5 12h11' stroke='black' stroke-width='2.2' stroke-linecap='round'/%3E%3Cpath d='M12 7l5 5-5 5' stroke='black' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none'%3E%3Cpath d='M5 12h11' stroke='black' stroke-width='2.2' stroke-linecap='round'/%3E%3Cpath d='M12 7l5 5-5 5' stroke='black' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / contain no-repeat;
}

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

.button-primary {
  background: var(--accent);
  color: var(--accent-contrast);
  box-shadow: 0 14px 24px color-mix(in srgb, var(--accent) 22%, transparent);
}

.button-secondary {
  background: var(--panel-soft);
  border-color: var(--line-strong);
  color: var(--text);
}

.hero-panel {
  display: grid;
  align-content: start;
  gap: 14px;
}

.signal-list,
.policy-list {
  margin: 0;
  padding-left: 18px;
  list-style-position: outside;
}

.signal-list li,
.policy-list li {
  margin-top: 8px;
  line-height: 1.55;
}

.panel-card,
.policy-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, color-mix(in srgb, var(--panel) 98%, transparent), color-mix(in srgb, var(--panel-strong) 100%, transparent));
}

.panel-card {
  padding: 17px;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 18px;
}

.section-heading h2 {
  font-size: clamp(1.8rem, 3vw, 2.7rem);
}

.privacy-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.policy-card {
  padding: 18px;
}

.policy-card-full {
  grid-column: 1 / -1;
}

.policy-card p,
.policy-list {
  margin-top: 10px;
}

.site-footer {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  text-align: center;
  padding: 0 8px 24px;
  font-size: 0.84rem;
}

.site-footer-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 700;
}

.site-footer-link:hover {
  color: var(--accent-strong);
}

@media (max-width: 900px) {
  .hero-grid,
  .privacy-grid {
    grid-template-columns: 1fr;
  }

  .topbar {
    flex-direction: column;
    align-items: stretch;
  }

  .language-switcher {
    justify-content: space-between;
  }
}

@media (max-width: 640px) {
  .page {
    width: min(100%, calc(100% - 20px));
    padding-top: 10px;
  }

  .section {
    padding: 18px;
  }

  .hero-copy h1 {
    font-size: clamp(2.1rem, 11vw, 3rem);
  }

  .brand-name {
    font-size: 1.25rem;
  }

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

  .button {
    width: 100%;
  }
}