:root {
  --bg: #0a0e14;
  --surface: #141b24;
  --surface-elevated: #1c2633;
  --text: #e8eef4;
  --muted: #9aa8b4;
  --accent: #3d9cf0;
  --accent-purple: #8b6cff;
  --border: #2a3544;
  --link: #6ec1ff;
  --gradient: linear-gradient(135deg, #3d9cf0 0%, #7c5cff 100%);
  --glow: rgba(61, 156, 240, 0.35);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", system-ui, -apple-system, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  display: flex;
  flex-direction: column;
}

body.page-home {
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(61, 156, 240, 0.18), transparent),
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(124, 92, 255, 0.12), transparent),
    var(--bg);
}

a {
  color: var(--link);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(20, 27, 36, 0.85);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.site-header__inner {
  max-width: 72rem;
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
}

.brand:hover {
  color: var(--accent);
  text-decoration: none;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1.1rem;
}

.nav a {
  color: var(--muted);
  font-size: 0.92rem;
}

.nav a:hover {
  color: var(--text);
}

main {
  max-width: 52rem;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

h1 {
  font-size: 1.85rem;
  font-weight: 700;
  margin: 0 0 1rem;
  line-height: 1.25;
}

h2 {
  font-size: 1.2rem;
  margin: 2rem 0 0.65rem;
  color: var(--text);
}

h3 {
  font-size: 1.05rem;
  margin: 1.35rem 0 0.45rem;
  color: var(--muted);
  font-weight: 600;
}

p,
li {
  color: var(--text);
}

.lead {
  font-size: 1.08rem;
  color: var(--muted);
  margin: 0 0 1.5rem;
}

ul {
  padding-left: 1.25rem;
}

li {
  margin: 0.35rem 0;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem 1.35rem;
  margin: 1.25rem 0;
}

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

.card p:last-child {
  margin-bottom: 0;
}

pre.template {
  background: #0a0e12;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.82rem;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 1.5rem 1.25rem;
  margin-top: auto;
}

.site-footer__inner {
  max-width: 72rem;
  margin: 0 auto;
  text-align: center;
  font-size: 0.88rem;
  color: var(--muted);
}

.site-footer__inner strong {
  color: var(--text);
  font-weight: 600;
}

.meta {
  font-size: 0.88rem;
  color: var(--muted);
  margin-bottom: 1.5rem;
}

.legal-doc h2 {
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.35rem;
}

.legal-doc h3 {
  color: var(--text);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.btn {
  display: inline-block;
  padding: 0.55rem 1rem;
  border-radius: 8px;
  background: var(--accent);
  color: #0a1624 !important;
  font-weight: 600;
  font-size: 0.92rem;
}

.btn:hover {
  filter: brightness(1.08);
  text-decoration: none;
}

.btn--ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text) !important;
}

.btn--ghost:hover {
  border-color: var(--accent);
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-left: 0.5rem;
  padding-left: 0.75rem;
  border-left: 1px solid var(--border);
  font-size: 0.85rem;
}

.lang-switch a {
  color: var(--muted);
  padding: 0.2rem 0.45rem;
  border-radius: 6px;
}

.lang-switch a[aria-current="page"],
.lang-switch a.is-active {
  color: var(--text);
  background: rgba(61, 156, 240, 0.15);
  font-weight: 600;
  text-decoration: none;
}

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 1.25rem;
  margin-top: 0.75rem;
}

.site-footer__links a {
  color: var(--muted);
  font-size: 0.85rem;
}

/* —— Homepage —— */
main.home {
  max-width: 72rem;
  padding: 0 1.25rem 4rem;
}

.home-hero {
  position: relative;
  padding: 3.5rem 0 2.5rem;
  text-align: center;
}

.home-hero__badge {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid rgba(61, 156, 240, 0.35);
  background: rgba(61, 156, 240, 0.08);
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  margin-bottom: 1.25rem;
}

.home-hero h1 {
  font-size: clamp(2rem, 5vw, 2.85rem);
  font-weight: 800;
  margin: 0 0 0.75rem;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1.15;
}

.home-hero .lead {
  max-width: 36rem;
  margin: 0 auto 1.75rem;
  font-size: 1.12rem;
}

.home-hero__visual {
  margin: 2rem auto 0;
  max-width: 28rem;
  height: 10rem;
  border-radius: 16px;
  border: 1px solid var(--border);
  background:
    radial-gradient(circle at 30% 40%, rgba(61, 156, 240, 0.25), transparent 55%),
    radial-gradient(circle at 70% 60%, rgba(124, 92, 255, 0.2), transparent 50%),
    var(--surface-elevated);
  position: relative;
  overflow: hidden;
}

.home-hero__visual::before,
.home-hero__visual::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(110, 193, 255, 0.35);
}

.home-hero__visual::before {
  width: 3rem;
  height: 3rem;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 24px var(--glow);
}

.home-hero__visual::after {
  width: 7rem;
  height: 7rem;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  opacity: 0.5;
}

.section-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin: 2.5rem 0 1rem;
  text-align: center;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin: 1rem 0 2rem;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.35rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
  border-color: rgba(61, 156, 240, 0.45);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
}

.feature-card__icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 10px;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  margin-bottom: 0.85rem;
}

.feature-card h3 {
  margin: 0 0 0.45rem;
  color: var(--text);
  font-size: 1.05rem;
}

.feature-card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--muted);
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 1rem 0 2rem;
}

.steps li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.25rem;
  position: relative;
  padding-top: 2.5rem;
}

.steps li::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  top: 1rem;
  left: 1.25rem;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 8px;
  background: var(--gradient);
  color: #0a1624;
  font-weight: 800;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.steps strong {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--text);
}

.steps span {
  font-size: 0.9rem;
  color: var(--muted);
}

.compliance-panel {
  background: var(--surface-elevated);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem 1.35rem;
  margin: 2rem 0;
}

.compliance-panel ul {
  margin: 0.75rem 0 0;
  padding-left: 1.15rem;
}

.compliance-panel li {
  color: var(--muted);
  font-size: 0.92rem;
}

.cta-panel {
  text-align: center;
  background:
    linear-gradient(135deg, rgba(61, 156, 240, 0.12), rgba(124, 92, 255, 0.1)),
    var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem 1.5rem;
  margin-top: 2.5rem;
}

.cta-panel p {
  color: var(--muted);
  max-width: 32rem;
  margin: 0 auto 1.25rem;
}

.cta-panel .actions {
  justify-content: center;
}

.store-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  margin-bottom: 1rem;
}

.store-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1rem;
  border-radius: 10px;
  border: 1px dashed var(--border);
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 600;
}

@media (max-width: 640px) {
  .nav {
    width: 100%;
    justify-content: flex-start;
  }

  .lang-switch {
    margin-left: 0;
    padding-left: 0;
    border-left: none;
  }

  .home-hero {
    padding-top: 2rem;
  }
}

/* —— Legal & support pages —— */
.draft-banner {
  max-width: 72rem;
  margin: 0 auto;
  padding: 0.65rem 1.25rem;
  font-size: 0.88rem;
  color: var(--muted);
  background: rgba(124, 92, 255, 0.08);
  border-bottom: 1px solid var(--border);
  text-align: center;
}

.draft-banner strong {
  color: var(--accent-purple);
}

main.legal-doc,
main.legal-page {
  max-width: 48rem;
}

.legal-doc h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.legal-doc .meta {
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.support-links {
  display: grid;
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.support-link-card {
  display: block;
  padding: 1rem 1.15rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  text-decoration: none;
}

.support-link-card:hover {
  border-color: var(--accent);
  text-decoration: none;
}

.support-link-card span {
  display: block;
  font-size: 0.88rem;
  color: var(--muted);
  margin-top: 0.25rem;
}