:root {
  color-scheme: light;
  --bs-primary: #2f73ff;
  --bs-primary-rgb: 47, 115, 255;
  --bs-secondary: #53606c;
  --bs-secondary-rgb: 83, 96, 108;
  --bs-success: #5f8f14;
  --bs-success-rgb: 95, 143, 20;
  --bs-warning: #d96c16;
  --bs-warning-rgb: 217, 108, 22;
  --bs-danger: #d94b55;
  --bs-danger-rgb: 217, 75, 85;
  --bs-body-color: #111a22;
  --bs-body-bg: #f0ede4;
  --bs-border-color: rgba(17, 26, 34, 0.16);
  --bs-border-radius: 10px;
  --bs-border-radius-sm: 7px;
  --bs-border-radius-lg: 18px;
  --bs-border-radius-xl: 24px;
  --bs-link-color: #245fcf;
  --bs-link-hover-color: #0f48b7;
  --signal-ink: #0b131a;
  --signal-ink-soft: #1a2630;
  --signal-paper: #f0ede4;
  --signal-paper-bright: #fffdf7;
  --signal-paper-muted: #e8e4d9;
  --signal-line: rgba(11, 19, 26, 0.16);
  --signal-line-strong: rgba(11, 19, 26, 0.3);
  --signal-muted: #66717a;
  --signal-blue: #2f73ff;
  --signal-blue-deep: #174ab0;
  --signal-lime: #b8f34b;
  --signal-cyan: #42dcc8;
  --signal-orange: #ff8b3e;
  --signal-shadow: 8px 8px 0 rgba(11, 19, 26, 0.09);
  --signal-shadow-hover: 11px 11px 0 rgba(11, 19, 26, 0.13);
  --signal-radius: 18px;
  --signal-header-offset: 76px;
  --signal-content-max: 1320px;
  --signal-display: "Bahnschrift", "DIN Alternate", "Microsoft YaHei", sans-serif;
  --signal-body: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --signal-mono: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--signal-header-offset);
}

body.signal-page {
  min-width: 320px;
  margin: 0;
  color: var(--signal-ink);
  background-color: var(--signal-paper);
  background-image:
    linear-gradient(rgba(11, 19, 26, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11, 19, 26, 0.035) 1px, transparent 1px),
    radial-gradient(circle at 88% 8%, rgba(66, 220, 200, 0.16), transparent 25rem),
    radial-gradient(circle at 8% 30%, rgba(47, 115, 255, 0.1), transparent 30rem);
  background-size: 32px 32px, 32px 32px, auto, auto;
  font-family: var(--signal-body);
  font-size: 16px;
  line-height: 1.72;
  letter-spacing: 0.005em;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
}

.signal-page ::selection {
  color: var(--signal-ink);
  background: var(--signal-lime);
}

.signal-page h1,
.signal-page h2,
.signal-page h3,
.signal-page h4,
.signal-page h5,
.signal-page h6 {
  color: var(--signal-ink);
  font-family: var(--signal-display);
  font-weight: 700;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

.signal-page a {
  color: var(--signal-blue-deep);
  text-underline-offset: 0.22em;
}

.signal-page a:hover {
  color: var(--signal-blue);
}

.signal-page :focus-visible {
  outline: 3px solid var(--signal-blue) !important;
  outline-offset: 3px;
}

.signal-page .signal-meta,
.signal-page .section-kicker,
.signal-page .eyebrow,
.signal-page .status-label,
.signal-page .info-label,
.signal-page .toc-title {
  font-family: var(--signal-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.signal-page .container,
.signal-page .container-lg,
.signal-page .container-xl,
.signal-page .shell,
.signal-page .topbar-inner {
  max-width: var(--signal-content-max);
}

.signal-page .top-nav,
.signal-page .topbar {
  position: sticky;
  top: 0;
  z-index: 1030;
  width: 100%;
  padding: 0;
  border: 0;
  border-bottom: 1px solid rgba(184, 243, 75, 0.26);
  border-radius: 0;
  color: #f7faed;
  background:
    linear-gradient(90deg, rgba(184, 243, 75, 0.08) 1px, transparent 1px),
    linear-gradient(180deg, #0b131a 0%, #111d26 100%);
  background-size: 28px 100%, auto;
  box-shadow: 0 12px 28px rgba(5, 10, 14, 0.2);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

.signal-page .topbar-inner {
  min-height: 64px;
  padding-inline: 20px;
}

.signal-page .brand {
  min-height: 48px;
  color: #fff;
  font-family: var(--signal-display);
  letter-spacing: 0.01em;
}

.signal-page .brand:hover {
  color: var(--signal-lime);
}

.signal-page .brand-mark {
  display: inline-grid;
  width: 36px;
  height: 36px;
  border: 1px solid var(--signal-lime);
  border-radius: 8px 2px 8px 2px;
  color: var(--signal-ink);
  background: var(--signal-lime);
  box-shadow: 4px 4px 0 rgba(184, 243, 75, 0.18);
  font-family: var(--signal-mono);
  place-items: center;
  transform: none;
}

.signal-page .site-nav-row {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 10px;
}

.signal-page .nav-scroll,
.signal-page .topnav {
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
  overscroll-behavior-inline: contain;
}

.signal-page .site-nav-row .nav-scroll {
  flex: 1 1 auto;
  min-width: 0;
}

.signal-page .nav-scroll::-webkit-scrollbar,
.signal-page .topnav::-webkit-scrollbar {
  display: none;
}

.signal-page .nav-scroll .nav,
.signal-page .topnav {
  min-width: max-content;
  flex-wrap: nowrap;
}

.signal-page .nav-scroll .nav-link,
.signal-page .topnav .nav-link,
.signal-page .topnav a {
  position: relative;
  display: inline-flex;
  min-height: 44px;
  padding: 10px 13px;
  border: 0;
  border-radius: 8px;
  color: rgba(255, 255, 255, 0.88);
  background: transparent;
  align-items: center;
  gap: 6px;
  font-family: var(--signal-body);
  font-size: 0.875rem;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0;
  text-decoration: none;
  white-space: nowrap;
  -webkit-font-smoothing: auto;
  transition: color 160ms ease, background-color 160ms ease, transform 160ms ease;
}

.signal-page .nav-scroll .nav-link:hover,
.signal-page .nav-scroll .nav-link.active,
.signal-page .topnav .nav-link:hover,
.signal-page .topnav .nav-link.active,
.signal-page .topnav a:hover,
.signal-page .topnav a.active {
  color: var(--signal-lime);
  background: rgba(184, 243, 75, 0.09);
}

.signal-page .nav-scroll .nav-link.active::after,
.signal-page .topnav .nav-link.active::after,
.signal-page .topnav a.active::after {
  position: absolute;
  right: 12px;
  bottom: 4px;
  left: 12px;
  height: 2px;
  background: var(--signal-lime);
  content: "";
}

.signal-page .nav-page-link {
  display: inline-flex;
  min-width: 44px;
  min-height: 44px;
  padding: 10px 14px;
  border: 1px solid rgba(255, 255, 255, 0.34);
  border-radius: 8px 2px 8px 2px;
  color: #fff;
  background: var(--signal-blue);
  box-shadow: 4px 4px 0 rgba(47, 115, 255, 0.2);
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  gap: 7px;
  font-family: var(--signal-display);
  font-size: 0.875rem;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  transition: color 160ms ease, background-color 160ms ease, border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.signal-page .nav-page-link:hover,
.signal-page .nav-page-link:focus-visible {
  border-color: var(--signal-lime);
  color: var(--signal-ink);
  background: var(--signal-lime);
  box-shadow: 4px 4px 0 rgba(184, 243, 75, 0.2);
  transform: translateY(-1px);
}

.signal-page .nav-page-link:focus-visible {
  outline: 3px solid #fff;
  outline-offset: 2px;
}

.signal-page .nav-page-link-label-short {
  display: none;
}

.signal-page .signal-panel,
.signal-page .glass-card,
.signal-page .section-card,
.signal-page .account-card,
.signal-page .recommend-card,
.signal-page .mini-card,
.signal-page .concept,
.signal-page .step,
.signal-page .safety-item,
.signal-page .faq-item,
.signal-page .store-utility-card,
.signal-page .third-party-card {
  position: relative;
  border: 1px solid var(--signal-line);
  border-radius: var(--signal-radius);
  background: rgba(255, 253, 247, 0.94);
  box-shadow: var(--signal-shadow);
}

.signal-page .signal-panel::before,
.signal-page .glass-card::before,
.signal-page .section-card::before {
  position: absolute;
  top: -1px;
  left: 24px;
  width: 52px;
  height: 4px;
  border-radius: 0 0 4px 4px;
  background: var(--signal-lime);
  content: "";
}

.signal-page .account-card,
.signal-page .recommend-card,
.signal-page .mini-card,
.signal-page .concept,
.signal-page .safety-item,
.signal-page .third-party-card {
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.signal-page .account-card:hover,
.signal-page .recommend-card:hover,
.signal-page .mini-card:hover,
.signal-page .concept:hover,
.signal-page .safety-item:hover,
.signal-page .third-party-card:hover {
  border-color: var(--signal-line-strong);
  box-shadow: var(--signal-shadow-hover);
  transform: translate(-2px, -2px);
}

.signal-page .btn,
.signal-page .button,
.signal-page .recommend-action {
  display: inline-flex;
  min-height: 44px;
  border-radius: 9px 2px 9px 2px;
  align-items: center;
  justify-content: center;
  gap: 7px;
  font-family: var(--signal-display);
  font-weight: 700;
  text-decoration: none;
  transition: color 150ms ease, background-color 150ms ease, border-color 150ms ease, transform 150ms ease, box-shadow 150ms ease;
}

.signal-page .btn-primary,
.signal-page .btn-success,
.signal-page .button-primary,
.signal-page .recommend-action {
  border-color: var(--signal-lime) !important;
  color: var(--signal-ink) !important;
  background: var(--signal-lime) !important;
  box-shadow: 4px 4px 0 rgba(11, 19, 26, 0.15) !important;
}

.signal-page .btn-primary:hover,
.signal-page .btn-success:hover,
.signal-page .button-primary:hover,
.signal-page .recommend-action:hover {
  border-color: #cdfd75 !important;
  color: var(--signal-ink) !important;
  background: #cdfd75 !important;
  transform: translate(-1px, -1px);
}

.signal-page .btn-outline-primary,
.signal-page .button:not(.button-primary) {
  border-color: var(--signal-blue) !important;
  color: var(--signal-blue-deep) !important;
  background: var(--signal-paper-bright) !important;
}

.signal-page .btn-outline-primary:hover,
.signal-page .button:not(.button-primary):hover {
  color: #fff !important;
  background: var(--signal-blue) !important;
}

.signal-page .btn:active,
.signal-page .button:active,
.signal-page .recommend-action:active {
  transform: translate(2px, 2px);
  box-shadow: none !important;
}

.signal-page .badge,
.signal-page .recommend-badge,
.signal-page .promo-code {
  border: 1px solid var(--signal-line);
  border-radius: 999px;
  font-family: var(--signal-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.signal-page .text-muted {
  color: var(--signal-muted) !important;
}

.signal-page .accordion {
  --bs-accordion-color: var(--signal-ink);
  --bs-accordion-bg: transparent;
  --bs-accordion-border-color: var(--signal-line);
  --bs-accordion-btn-color: var(--signal-ink);
  --bs-accordion-btn-bg: var(--signal-paper-bright);
  --bs-accordion-active-color: var(--signal-blue-deep);
  --bs-accordion-active-bg: rgba(47, 115, 255, 0.08);
  --bs-accordion-btn-focus-box-shadow: 0 0 0 3px rgba(47, 115, 255, 0.24);
}

.signal-page .accordion-item {
  overflow: hidden;
  border: 1px solid var(--signal-line);
  border-radius: 12px !important;
  background: var(--signal-paper-bright);
}

.signal-page .accordion-item + .accordion-item {
  margin-top: 10px;
}

.signal-page .accordion-button {
  min-height: 52px;
  font-family: var(--signal-display);
  font-weight: 700;
}

.signal-page .accordion-button::after {
  filter: saturate(0.7);
}

.signal-page .table {
  --bs-table-color: var(--signal-ink);
  --bs-table-bg: var(--signal-paper-bright);
  --bs-table-border-color: var(--signal-line);
  --bs-table-hover-bg: rgba(184, 243, 75, 0.12);
  margin-bottom: 0;
  font-variant-numeric: tabular-nums;
}

.signal-page .table-responsive {
  border: 1px solid var(--signal-line);
  border-radius: 14px;
}

.signal-page .list-group {
  --bs-list-group-color: var(--signal-ink);
  --bs-list-group-bg: transparent;
  --bs-list-group-border-color: var(--signal-line);
}

.signal-page img {
  max-width: 100%;
  height: auto;
}

.signal-page .copy-feedback {
  border: 1px solid rgba(184, 243, 75, 0.38);
  color: #fff;
  background: rgba(11, 19, 26, 0.96);
  box-shadow: 6px 6px 0 rgba(47, 115, 255, 0.2);
  font-family: var(--signal-mono);
}

.signal-page .site-footer,
.signal-page .footer {
  border-top: 1px solid var(--signal-line);
  color: #cbd2d6;
  background:
    linear-gradient(rgba(184, 243, 75, 0.04) 1px, transparent 1px),
    var(--signal-ink);
  background-size: 100% 28px, auto;
}

.signal-page .site-footer h2,
.signal-page .site-footer h3,
.signal-page .site-footer strong,
.signal-page .footer h2,
.signal-page .footer h3,
.signal-page .footer strong {
  color: #fff;
}

.signal-page .back-top {
  position: fixed;
  right: max(1rem, env(safe-area-inset-right));
  bottom: max(1rem, env(safe-area-inset-bottom));
  z-index: 1040;
  display: inline-flex;
  min-width: 46px;
  min-height: 46px;
  padding: 10px 16px;
  border: 1px solid var(--signal-lime);
  border-radius: 10px 2px 10px 2px;
  color: var(--signal-ink);
  background: var(--signal-lime);
  box-shadow: 5px 5px 0 rgba(11, 19, 26, 0.22);
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--signal-display);
  font-size: 0.875rem;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  transition: color 160ms ease, background-color 160ms ease, border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.signal-page .back-top i {
  color: inherit;
  font-size: 1rem;
}

.signal-page .back-top:hover,
.signal-page .back-top:focus-visible {
  border-color: var(--signal-blue);
  color: #fff;
  background: var(--signal-blue);
  box-shadow: 5px 5px 0 rgba(47, 115, 255, 0.22);
  transform: translateY(-2px);
}

.signal-page .back-top:focus-visible {
  outline: 3px solid var(--signal-ink);
  outline-offset: 3px;
}

.signal-page > .view-image {
  z-index: 2000 !important;
}

@keyframes signal-rise {
  from {
    opacity: 0;
    transform: translateY(12px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.signal-page .signal-panel,
.signal-page .section-card {
  animation: signal-rise 420ms both;
}

.signal-page .signal-panel:nth-of-type(2),
.signal-page .section-card:nth-of-type(2) {
  animation-delay: 60ms;
}

.signal-page .signal-panel:nth-of-type(3),
.signal-page .section-card:nth-of-type(3) {
  animation-delay: 120ms;
}

@media (max-width: 991.98px) {
  :root {
    --signal-header-offset: 112px;
  }

  .signal-page .topbar-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 0;
  }

  .signal-page .brand {
    padding-top: 8px;
  }

  .signal-page .topnav {
    width: 100%;
  }
}

@media (max-width: 575.98px) {
  body.signal-page {
    font-size: 15px;
  }

  .signal-page .signal-panel,
  .signal-page .glass-card,
  .signal-page .section-card {
    border-radius: 14px;
    box-shadow: 5px 5px 0 rgba(11, 19, 26, 0.08);
  }

  .signal-page .hero-actions .btn,
  .signal-page .hero-actions .button {
    width: 100%;
  }

  .signal-page .site-nav-row {
    gap: 6px;
  }

  .signal-page .nav-page-link {
    padding-inline: 12px;
  }

  .signal-page .nav-page-link-label {
    display: none;
  }

  .signal-page .nav-page-link-label-short {
    display: inline;
  }

  .signal-page .back-top {
    width: 48px;
    min-width: 48px;
    height: 48px;
    padding: 0;
    border-radius: 9px 2px 9px 2px;
  }

  .signal-page .back-top span {
    display: none;
  }
}

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

  .signal-page *,
  .signal-page *::before,
  .signal-page *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}