* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 5% 4%, var(--page-glow-primary), transparent 26%),
    radial-gradient(circle at 96% 18%, var(--page-glow-secondary), transparent 22%),
    var(--page);
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
}

button,
input {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
}

button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 3px solid rgba(81, 71, 223, 0.24);
  outline-offset: 2px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 10px;
  left: 10px;
  transform: translateY(-150%);
  border-radius: 10px;
  padding: 10px 14px;
  color: #fff;
  background: var(--surface-strong);
  text-decoration: none;
  transition: transform 0.2s;
}

.skip-link:focus {
  transform: translateY(0);
}

.shell {
  width: min(calc(100% - 40px), var(--content-width));
  margin: 0 auto;
}

.tool-shell {
  width: min(calc(100% - 40px), var(--tool-width));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  z-index: 30;
  top: 0;
  border-bottom: 1px solid rgba(227, 230, 239, 0.84);
  background: var(--header-background);
  backdrop-filter: blur(18px);
}

.header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

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

.brand-mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  color: #fff;
  background: linear-gradient(145deg, #6258ec, #3e35bd);
  box-shadow: 0 8px 20px rgba(81, 71, 223, 0.28);
  font-size: 20px;
  font-weight: 900;
}

.brand-copy {
  display: grid;
  gap: 1px;
}

.brand-name {
  font-size: 18px;
  font-weight: 850;
  letter-spacing: -0.04em;
}

.brand-tagline {
  color: var(--subtle);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  border: 0;
  border-radius: 10px;
  padding: 0 14px;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
}

.nav-link:hover,
.nav-link[aria-current="page"] {
  color: var(--text);
  background: var(--surface);
}

.privacy-chip {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-left: 10px;
  border: 1px solid #cce9dc;
  border-radius: 999px;
  padding: 0 13px;
  color: var(--success);
  background: var(--success-soft);
  font-size: 12px;
  font-weight: 800;
}

.privacy-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 4px rgba(22, 131, 94, 0.11);
}

.site-footer {
  padding: 34px 0 44px;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: var(--subtle);
  font-size: 12px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

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

.footer-link:hover {
  color: var(--primary);
}

.primary-button,
.secondary-button,
.mini-button {
  min-height: 44px;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 850;
  transition: transform 0.15s, background 0.2s, box-shadow 0.2s;
}

.primary-button {
  border: 1px solid var(--primary);
  color: #fff;
  background: var(--primary);
  box-shadow: 0 10px 22px rgba(81, 71, 223, 0.22);
}

.primary-button:hover {
  transform: translateY(-1px);
  border-color: var(--primary-dark);
  background: var(--primary-dark);
}

.secondary-button,
.mini-button {
  border: 1px solid var(--border-strong);
  color: var(--text);
  background: var(--surface);
}

.secondary-button:hover,
.mini-button:hover {
  transform: translateY(-1px);
  background: var(--surface-hover);
}

.mini-button {
  min-height: 38px;
  padding: 0 13px;
  font-size: 12px;
}

.mini-button.primary {
  border-color: var(--primary);
  color: #fff;
  background: var(--primary);
}

.toast {
  position: fixed;
  z-index: 60;
  right: 24px;
  bottom: 24px;
  max-width: min(calc(100% - 48px), 390px);
  display: flex;
  align-items: center;
  gap: 11px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 14px;
  padding: 14px 17px;
  color: #fff;
  background: #202337;
  box-shadow: 0 18px 45px rgba(19, 21, 37, 0.25);
  opacity: 0;
  transform: translateY(18px);
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
  font-size: 13px;
  font-weight: 700;
}

.toast.visible {
  opacity: 1;
  transform: translateY(0);
}

.toast-mark {
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  border-radius: 50%;
  color: #fff;
  background: var(--primary);
  font-size: 11px;
  font-weight: 900;
}

.content-page {
  padding: 54px 0 80px;
}

.content-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(26px, 5vw, 48px);
  background: var(--card-background);
  box-shadow: var(--shadow-sm);
}

.content-card h1 {
  margin: 0 0 14px;
  font-size: clamp(30px, 5vw, 44px);
  letter-spacing: -0.05em;
}

.content-lead {
  margin: 0 0 36px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
}

.content-card h2 {
  margin: 34px 0 12px;
  font-size: 20px;
  letter-spacing: -0.025em;
}

.content-card p,
.content-card li {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.85;
}

.content-card ul {
  padding-left: 22px;
}

.content-note {
  margin-top: 30px;
  border: 1px solid #cfeadd;
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  color: #226f55;
  background: var(--success-soft);
  font-size: 13px;
  line-height: 1.7;
}

.noscript-message {
  margin: 18px auto;
  border: 1px solid #f0d49c;
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  color: var(--warning);
  background: var(--warning-soft);
  font-size: 13px;
}

@media (max-width: 720px) {
  .shell,
  .tool-shell {
    width: min(calc(100% - 28px), var(--content-width));
  }

  .header-inner {
    min-height: 64px;
  }

  .brand-tagline,
  .privacy-chip {
    display: none;
  }

  .nav-link {
    padding: 0 9px;
    font-size: 12px;
  }

  .nav-link.optional {
    display: none;
  }

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

@media (max-width: 420px) {
  .brand-copy {
    display: none;
  }

  .toast {
    right: 14px;
    bottom: 14px;
    max-width: calc(100% - 28px);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}
.language-switcher,
.theme-switcher {
  min-width: 48px;
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid var(--color-border, #d9dce5);
  border-radius: 999px;
  background: transparent;
  color: inherit;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  max-width: 132px;
}

.language-switcher:hover,
.language-switcher:focus-visible,
.theme-switcher:hover,
.theme-switcher:focus-visible {
  border-color: var(--color-primary, #5147df);
  color: var(--color-primary, #5147df);
}

.theme-switcher {
  min-width: 88px;
}

@media (max-width: 720px) {
  .language-switcher,
  .theme-switcher {
    width: 42px;
    min-width: 42px;
    padding: 0 6px;
  }
}