/* 开发者工具箱 — 统一设计系统 */
:root {
  --site-primary: #2563eb;
  --site-primary-hover: #1d4ed8;
  --site-primary-light: #eff6ff;
  --site-accent: #0ea5e9;
  --site-bg: #f1f5f9;
  --site-surface: #ffffff;
  --site-text: #0f172a;
  --site-text-muted: #64748b;
  --site-border: #e2e8f0;
  --site-header-top-gap: max(10px, env(safe-area-inset-top, 0px));
  --site-header-side-gap: 16px;
  --site-header-bar-h: 56px;
  --site-header-content-gap: 12px;
  --site-header-h: calc(var(--site-header-top-gap) + var(--site-header-bar-h) + var(--site-header-content-gap));
  --site-radius: 12px;
  --site-radius-sm: 8px;
  --site-shadow: 0 1px 3px rgba(15, 23, 42, 0.08), 0 4px 12px rgba(15, 23, 42, 0.04);
  --site-shadow-lg: 0 8px 30px rgba(15, 23, 42, 0.1);
  --site-font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --site-mono: 'SF Mono', 'Cascadia Code', Consolas, monospace;
  --site-max-w: 1200px;
}

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

body.has-site-layout {
  margin: 0;
  padding-top: var(--site-header-h);
  font-family: var(--site-font);
  background: var(--site-bg);
  color: var(--site-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body.has-site-layout .floating-back-button {
  display: none !important;
}

/* ── Header ── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding-top: var(--site-header-top-gap);
  padding-left: var(--site-header-side-gap);
  padding-right: var(--site-header-side-gap);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--site-border);
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
}

.site-header-inner {
  max-width: var(--site-max-w);
  margin: 0 auto;
  height: var(--site-header-bar-h);
  padding: 0 4px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 100%;
  text-decoration: none;
  color: var(--site-text);
  font-weight: 700;
  font-size: 1.05rem;
  white-space: nowrap;
  flex-shrink: 0;
  line-height: 1;
}

.site-logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--site-primary), var(--site-accent));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 14px;
  font-family: var(--site-mono);
  font-weight: 700;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.site-nav a {
  padding: 6px 12px;
  border-radius: var(--site-radius-sm);
  text-decoration: none;
  color: var(--site-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.15s, background 0.15s;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--site-primary);
  background: var(--site-primary-light);
}

.site-search-wrap {
  flex: 1;
  max-width: 360px;
  min-width: 0;
  position: relative;
  display: flex;
  align-items: center;
  height: 100%;
}

.site-search-wrap svg {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--site-text-muted);
  pointer-events: none;
}

.site-header .site-search,
.site-header input.site-search {
  width: 100%;
  height: 38px;
  margin: 0;
  padding: 0 12px 0 36px;
  border: 1px solid var(--site-border);
  border-radius: 999px;
  font-family: var(--site-font);
  font-size: 0.875rem;
  line-height: 38px;
  background: var(--site-bg);
  color: var(--site-text);
  outline: none;
  box-sizing: border-box;
  transition: border-color 0.15s, box-shadow 0.15s;
  -webkit-appearance: none;
  appearance: none;
}

.site-header .site-search:focus {
  border-color: var(--site-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
  background: var(--site-surface);
}

.site-search-wrap.open .site-search {
  border-color: var(--site-primary);
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
  background: var(--site-surface);
}

.site-search-panel {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  z-index: 200;
  margin-top: -1px;
  background: var(--site-surface);
  border: 1px solid var(--site-primary);
  border-top: none;
  border-radius: 0 0 var(--site-radius) var(--site-radius);
  box-shadow: var(--site-shadow-lg);
  max-height: min(420px, 70vh);
  overflow-y: auto;
}

.site-search-section {
  padding: 10px 12px 6px;
}

.site-search-section + .site-search-section {
  border-top: 1px solid var(--site-border);
}

.site-search-section-title {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--site-text-muted);
  margin-bottom: 8px;
}

.site-search-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.site-search-chip {
  padding: 4px 10px;
  font-size: 0.78rem;
  font-family: var(--site-font);
  font-weight: 600;
  color: var(--site-primary);
  background: var(--site-primary-light);
  border: 1px solid transparent;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.site-search-chip:hover {
  background: #dbeafe;
  border-color: rgba(37, 99, 235, 0.25);
}

.site-search-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-search-item {
  padding: 8px 10px;
  border-radius: var(--site-radius-sm);
  cursor: pointer;
  transition: background 0.12s;
}

.site-search-item:hover,
.site-search-item.active {
  background: var(--site-primary-light);
}

.site-search-item-main {
  display: flex;
  align-items: center;
  gap: 8px;
}

.site-search-item-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--site-text);
}

.site-search-heat {
  font-size: 0.72rem;
  font-weight: 700;
  color: #ea580c;
}

.site-search-item-desc {
  display: block;
  font-size: 0.75rem;
  color: var(--site-text-muted);
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.site-search-item-tag {
  display: inline-block;
  margin-top: 4px;
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--site-primary);
}

.site-search-empty {
  padding: 12px 10px;
  font-size: 0.82rem;
  color: var(--site-text-muted);
}

.site-search-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding: 8px 12px;
  border-top: 1px solid var(--site-border);
  font-size: 0.68rem;
  color: var(--site-text-muted);
  background: var(--site-bg);
  border-radius: 0 0 var(--site-radius) var(--site-radius);
}

.site-menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  background: none;
  border: none;
  padding: 0;
  margin: 0;
  cursor: pointer;
  color: var(--site-text);
  border-radius: var(--site-radius-sm);
}

.site-menu-toggle:hover {
  background: var(--site-primary-light);
  color: var(--site-primary);
}

/* ── Footer ── */
.site-footer {
  background: var(--site-surface);
  border-top: 1px solid var(--site-border);
  padding: 32px 20px;
  margin-top: auto;
}

.site-footer-inner {
  max-width: var(--site-max-w);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.site-footer p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--site-text-muted);
}

.site-footer a {
  color: var(--site-text-muted);
  text-decoration: none;
}

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

/* ── Page layout ── */
.site-main {
  max-width: var(--site-max-w);
  margin: 0 auto;
  padding: 32px 20px 48px;
}

.site-page-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin: 0 0 8px;
  letter-spacing: -0.02em;
}

.site-page-desc {
  color: var(--site-text-muted);
  margin: 0 0 28px;
  font-size: 1rem;
}

/* ── Hero ── */
.site-hero {
  text-align: center;
  padding: 48px 20px 40px;
  max-width: 720px;
  margin: 0 auto;
}

.site-hero-badge {
  display: inline-block;
  padding: 4px 12px;
  background: var(--site-primary-light);
  color: var(--site-primary);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.site-hero h1 {
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  font-weight: 800;
  margin: 0 0 16px;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.site-hero p {
  font-size: 1.05rem;
  color: var(--site-text-muted);
  margin: 0 0 28px;
  line-height: 1.7;
}

.site-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

/* ── Buttons ── */
.site-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--site-radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
}

.site-btn-primary {
  background: var(--site-primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

.site-btn-primary:hover {
  background: var(--site-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
}

.site-btn-secondary {
  background: var(--site-surface);
  color: var(--site-text);
  border: 1px solid var(--site-border);
}

.site-btn-secondary:hover {
  border-color: var(--site-primary);
  color: var(--site-primary);
}

/* ── Tool cards ── */
.site-section {
  margin-bottom: 40px;
}

.site-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.site-section-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.site-section-title span {
  font-size: 1.1rem;
}

.site-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.site-card {
  background: var(--site-surface);
  border: 1px solid var(--site-border);
  border-radius: var(--site-radius);
  padding: 20px;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.15s;
  box-shadow: var(--site-shadow);
}

.site-card:hover {
  border-color: var(--site-primary);
  box-shadow: var(--site-shadow-lg);
  transform: translateY(-2px);
}

.site-card-name {
  font-weight: 700;
  font-size: 1rem;
  color: var(--site-text);
}

.site-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.site-card-header .site-card-name {
  flex: 1;
  min-width: 0;
}

.site-card-heat {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 2px 8px;
  font-size: 0.72rem;
  font-weight: 700;
  border-radius: 999px;
  white-space: nowrap;
}

.site-card-heat.hot {
  color: #c2410c;
  background: #ffedd5;
}

.site-card-heat.warm {
  color: #b45309;
  background: #fef3c7;
}

.site-card-heat.rise {
  color: #047857;
  background: #d1fae5;
}

.site-card-heat.normal {
  color: var(--site-text-muted);
  background: var(--site-bg);
}

.site-card-desc {
  font-size: 0.85rem;
  color: var(--site-text-muted);
  line-height: 1.5;
  flex: 1;
}

.site-card-tag {
  font-size: 0.75rem;
  color: var(--site-primary);
  font-weight: 600;
}

.site-card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
}

.site-card-pricing {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
  line-height: 1.4;
}

.site-card-pricing.pricing-free {
  color: #166534;
  background: #dcfce7;
  border: 1px solid #86efac;
}

.site-card-pricing.pricing-freemium {
  color: #92400e;
  background: #fef3c7;
  border: 1px solid #fcd34d;
}

.site-card-pricing.pricing-paid {
  color: #991b1b;
  background: #fee2e2;
  border: 1px solid #fca5a5;
}

/* ── 竞品收费对照页 ── */
.pricing-compare-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin: 24px 0 32px;
}

.pricing-stat-card {
  border: 1px solid var(--site-border);
  border-radius: var(--site-radius);
  padding: 16px;
  text-align: center;
  background: var(--site-surface, #fff);
}

.pricing-stat-num {
  display: block;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--site-primary);
}

.pricing-stat-label {
  font-size: 0.85rem;
  color: var(--site-text-muted);
}

.pricing-compare-section {
  margin-bottom: 40px;
}

.pricing-compare-block {
  margin-bottom: 28px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--site-border);
}

.pricing-compare-block:last-child {
  border-bottom: none;
}

.pricing-compare-block-title {
  font-size: 1.15rem;
  margin: 0 0 8px;
}

.pricing-compare-our-note {
  font-size: 0.9rem;
  color: var(--site-text-muted);
  margin: 0 0 12px;
}

.pricing-compare-table-wrap {
  overflow-x: auto;
}

.pricing-compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.pricing-compare-table th,
.pricing-compare-table td {
  border: 1px solid var(--site-border);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}

.pricing-compare-table th {
  background: var(--site-bg);
  font-weight: 600;
}

.pricing-compare-highlight-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.pricing-highlight-card {
  border: 1px solid var(--site-border);
  border-radius: var(--site-radius);
  padding: 16px;
  background: var(--site-surface, #fff);
}

.pricing-highlight-card h3 {
  margin: 0 0 12px;
  font-size: 1rem;
}

.pricing-highlight-card h3 a {
  color: var(--site-primary);
  text-decoration: none;
}

.pricing-highlight-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--site-text-muted);
  margin: 12px 0 4px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.pricing-highlight-card ul {
  margin: 0;
  padding-left: 1.2rem;
  font-size: 0.85rem;
  line-height: 1.55;
}

.pricing-highlight-card .pricing-our-free li {
  color: #166534;
}

.pricing-compare-footnote {
  font-size: 0.8rem;
  color: var(--site-text-muted);
  margin-top: 24px;
}

/* ── Features strip（纯展示，非可点击） ── */
.site-features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 40px 0;
}

.site-feature {
  border-radius: var(--site-radius);
  padding: 18px 16px;
  text-align: center;
  cursor: default;
  user-select: none;
  border: none;
  box-shadow: none;
}

.site-feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin: 0 auto 10px;
  font-size: 1.25rem;
  border-radius: 10px;
}

.site-feature h3 {
  font-size: 0.92rem;
  margin: 0 0 6px;
  font-weight: 700;
}

.site-feature p {
  font-size: 0.78rem;
  color: var(--site-text-muted);
  margin: 0;
  line-height: 1.5;
}

.site-feature--secure {
  background: linear-gradient(160deg, #ecfdf5 0%, #d1fae5 100%);
}
.site-feature--secure .site-feature-icon {
  background: rgba(16, 185, 129, 0.18);
}
.site-feature--secure h3 { color: #047857; }

.site-feature--fast {
  background: linear-gradient(160deg, #fffbeb 0%, #fef3c7 100%);
}
.site-feature--fast .site-feature-icon {
  background: rgba(245, 158, 11, 0.2);
}
.site-feature--fast h3 { color: #b45309; }

.site-feature--mobile {
  background: linear-gradient(160deg, #f5f3ff 0%, #ede9fe 100%);
}
.site-feature--mobile .site-feature-icon {
  background: rgba(139, 92, 246, 0.18);
}
.site-feature--mobile h3 { color: #6d28d9; }

.site-feature--dev {
  background: linear-gradient(160deg, #eff6ff 0%, #dbeafe 100%);
}
.site-feature--dev .site-feature-icon {
  background: rgba(37, 99, 235, 0.15);
  font-family: ui-monospace, monospace;
  font-size: 1rem;
  font-weight: 700;
  color: var(--site-primary);
}
.site-feature--dev h3 { color: #1d4ed8; }

@media (max-width: 768px) {
  .site-features {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .site-features {
    grid-template-columns: 1fr;
  }
}

/* ── Category filter pills ── */
.site-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.site-pill {
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--site-border);
  background: var(--site-surface);
  color: var(--site-text-muted);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}

.site-pill:hover,
.site-pill.active {
  background: var(--site-primary);
  border-color: var(--site-primary);
  color: #fff;
}

.site-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 48px;
  color: var(--site-text-muted);
}

/* ── Tool page wrapper ── */
.site-tool-content {
  max-width: var(--site-max-w);
  margin: 0 auto;
  padding: 24px 20px 48px;
}

.site-breadcrumb {
  font-size: 0.85rem;
  color: var(--site-text-muted);
  margin-bottom: 16px;
}

.site-breadcrumb a {
  color: var(--site-text-muted);
  text-decoration: none;
}

.site-breadcrumb a:hover { color: var(--site-primary); }

/* ── Mobile ── */
@media (max-width: 768px) {
  :root {
    --site-header-bar-h: 52px;
    --site-header-side-gap: max(12px, env(safe-area-inset-left, 0px));
  }

  .site-nav {
    display: none;
    position: absolute;
    top: calc(var(--site-header-top-gap) + var(--site-header-bar-h));
    left: 0;
    right: 0;
    background: var(--site-surface);
    border-bottom: 1px solid var(--site-border);
    flex-direction: column;
    padding: 12px var(--site-header-side-gap) 16px;
    gap: 4px;
    box-shadow: var(--site-shadow-lg);
  }

  .site-nav.open { display: flex; }

  .site-nav a {
    width: 100%;
    padding: 10px 12px;
  }

  .site-menu-toggle { display: flex; margin-left: auto; }

  .site-search-wrap {
    flex: 1;
    max-width: none;
  }

  .site-header-inner { gap: 10px; padding: 0; }

  .site-grid {
    grid-template-columns: 1fr;
  }

  .site-hero { padding: 32px 0 24px; }
}