:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-soft: #f8fafc;
  --surface-muted: #f1f5f9;
  --line: #e2e8f0;
  --line-strong: #cbd5e1;
  --text: #0f172a;
  --muted: #64748b;
  --primary: #2563eb;
  --primary-strong: #1d4ed8;
  --primary-soft: #dbeafe;
  --accent: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
  --success: #16a34a;
  --success-soft: #dcfce7;
  --warning-soft: #f1f5f9;
  --warning-text: #64748b;
  --shadow-sm: 0 10px 30px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 20px 50px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 28px 60px rgba(37, 99, 235, 0.12);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 18px;
  --radius-sm: 14px;
  --max-width: 1180px;
  --font: Inter, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(circle at top right, rgba(124, 58, 237, 0.08), transparent 28%),
    radial-gradient(circle at top left, rgba(37, 99, 235, 0.08), transparent 24%),
    var(--bg);
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select,
textarea {
  font: inherit;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.72;
}

.page-shell {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px 20px 80px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 18px;
  margin-bottom: 24px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(10px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 16px;
}

.brand__mark {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  color: #fff;
  background: var(--accent);
  box-shadow: 0 12px 24px rgba(37, 99, 235, 0.22);
}

.topbar__nav {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
}

.topbar__nav a:hover,
.back-link:hover {
  color: var(--primary);
}

.hero {
  display: grid;
  gap: 24px;
  padding: 40px;
  margin-bottom: 28px;
  border-radius: var(--radius-xl);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(255, 255, 255, 0.94));
  border: 1px solid rgba(148, 163, 184, 0.16);
  box-shadow: var(--shadow-md);
}

.hero--home {
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.55fr);
  align-items: center;
}

.hero--tool {
  display: block;
  padding: 28px 32px;
}

.hero__eyebrow,
.tool-badge,
.status-pill,
.category-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
}

.hero__eyebrow,
.tool-badge {
  background: var(--primary-soft);
  color: var(--primary);
}

.hero h1,
.tool-header h1 {
  margin: 14px 0 12px;
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.06;
  letter-spacing: -0.04em;
}

.hero__lead,
.tool-header p,
.panel__header p,
.section__head p,
.tool-card p,
.result-empty,
.empty-state,
.tool-header__meta,
.tool-header__hint {
  color: var(--muted);
  line-height: 1.75;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.hero__stats {
  display: grid;
  gap: 14px;
}

.stat-card,
.panel,
.tool-card,
.result-card,
.result-list,
.result-highlight,
.empty-state {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.stat-card {
  padding: 20px 22px;
}

.stat-card strong {
  display: block;
  font-size: 30px;
  margin-bottom: 6px;
}

.stat-card span {
  color: var(--muted);
  font-size: 14px;
}

.section {
  margin-top: 30px;
}

.section--compact {
  margin-top: 24px;
}

.section__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.section__head h2,
.panel__header h2 {
  margin: 0 0 6px;
  font-size: 28px;
  letter-spacing: -0.03em;
}

.section__meta {
  color: var(--muted);
  font-size: 14px;
}

.tool-browser__bar {
  display: flex;
  justify-content: flex-start;
  margin-bottom: 18px;
}

.search-box {
  width: min(420px, 100%);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 16px;
  min-height: 52px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
}

.search-box:focus-within {
  border-color: rgba(37, 99, 235, 0.3);
  box-shadow: 0 12px 32px rgba(37, 99, 235, 0.1);
}

.search-box__icon {
  font-size: 16px;
}

.search-box input {
  flex: 1;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
}

.category-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 22px;
}

.category-tab {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 10px 16px;
  background: rgba(255, 255, 255, 0.78);
  color: var(--muted);
  cursor: pointer;
  transition: all 0.18s ease;
}

.category-tab:hover {
  border-color: var(--line-strong);
  color: var(--text);
}

.category-tab.is-active {
  background: var(--primary-soft);
  border-color: rgba(37, 99, 235, 0.18);
  color: var(--primary-strong);
}

.category-tab.is-active::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 6px;
  height: 3px;
  border-radius: 999px;
  background: var(--primary);
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
}

.tool-grid--compact {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.tool-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 22px;
  min-height: 228px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.tool-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(37, 99, 235, 0.16);
}

.tool-card--soon {
  background: var(--surface-muted);
  border-color: #e5e7eb;
  opacity: 0.92;
}

.tool-card--soon:hover {
  box-shadow: var(--shadow-sm);
  transform: translateY(-3px);
}

.tool-card__top {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: flex-start;
}

.tool-card__body {
  display: grid;
  gap: 10px;
}

.tool-card__icon {
  width: 52px;
  height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  font-size: 24px;
  background: linear-gradient(180deg, #eff6ff, #f8fafc);
  border: 1px solid #dbeafe;
}

.tool-card--soon .tool-card__icon {
  background: linear-gradient(180deg, #f8fafc, #f1f5f9);
  border-color: #e2e8f0;
}

.tool-card h3 {
  margin: 0;
  font-size: 18px;
}

.tool-card__meta {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.status-pill--live {
  background: var(--success-soft);
  color: var(--success);
}

.status-pill--soon {
  background: var(--warning-soft);
  color: var(--warning-text);
}

.category-chip {
  background: #eef2ff;
  color: #4f46e5;
}

.tool-card__action {
  font-weight: 700;
  color: var(--primary);
}

.tool-card__action.is-disabled {
  color: var(--muted);
  cursor: default;
}

.tool-card--soon .tool-card__action {
  color: #94a3b8;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--muted);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  color: var(--muted);
  font-size: 14px;
}

.breadcrumbs--footer {
  margin-top: 28px;
  padding: 0 4px;
}

.tool-header {
  display: grid;
  gap: 8px;
}

.tool-header__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.usage-banner {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
  padding: 10px 14px;
  border-radius: 999px;
  background: #fff7ed;
  border: 1px solid #fed7aa;
  color: #9a3412;
  font-size: 13px;
  font-weight: 700;
}

.tool-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 1.05fr);
  gap: 20px;
}

.panel {
  padding: 24px;
}

.panel--center {
  padding: 48px 32px;
  text-align: center;
}

.panel__header {
  margin-bottom: 18px;
}

.panel__header--row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
}

.panel__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tool-form {
  display: grid;
  gap: 18px;
}

.form-field {
  display: grid;
  gap: 10px;
}

.form-field label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  min-height: 54px;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: var(--surface-soft);
  color: var(--text);
  transition: border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.form-field textarea {
  min-height: 156px;
  resize: vertical;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: 0;
  background: #fff;
  border-color: rgba(37, 99, 235, 0.35);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

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

.btn--primary {
  color: #fff;
  background: var(--accent);
  box-shadow: 0 14px 28px rgba(37, 99, 235, 0.22);
}

.btn--ghost {
  color: var(--text);
  border-color: var(--line);
  background: #fff;
}

.btn--small {
  min-height: 40px;
  padding: 0 14px;
  font-size: 14px;
}

.btn--block {
  width: 100%;
}

.result-empty,
.empty-state {
  padding: 20px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-md);
  background: var(--surface-soft);
}

.empty-state--full {
  grid-column: 1 / -1;
}

.result-stack {
  display: grid;
  gap: 16px;
}

.result-card,
.result-list,
.result-highlight {
  padding: 20px;
}

.result-card h3,
.result-list h3,
.result-highlight h3 {
  margin: 0 0 10px;
  font-size: 16px;
}

.result-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.result-chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  background: #eff6ff;
  color: var(--primary);
  font-size: 14px;
  font-weight: 700;
}

.result-list ol,
.result-list ul,
.result-richtext ul {
  margin: 0;
  padding-left: 20px;
  color: var(--text);
  line-height: 1.8;
}

.result-richtext {
  display: grid;
  gap: 14px;
}

.result-textbox {
  padding: 16px 18px;
  border-radius: 16px;
  background: #f8fbff;
  border: 1px solid #dbeafe;
}

.result-richtext p {
  margin: 0;
  line-height: 1.85;
  color: var(--text);
}

.result-highlight {
  background: linear-gradient(180deg, #eff6ff, #ffffff);
  border: 1px solid #dbeafe;
}

.limit-notice {
  display: grid;
  gap: 14px;
  padding: 18px;
  border-radius: var(--radius-md);
  border: 1px solid #fed7aa;
  background: #fff7ed;
}

.limit-notice h3 {
  margin: 0;
  font-size: 18px;
}

.limit-notice p {
  margin: 0;
  color: #9a3412;
  line-height: 1.7;
}

.tool-index {
  margin-top: 24px;
}

.hidden {
  display: none !important;
}

.site-footer {
  margin-top: 36px;
  padding: 18px 0 6px;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 980px) {
  .hero--home,
  .tool-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .page-shell {
    padding: 18px 14px 56px;
  }

  .topbar {
    flex-direction: column;
    align-items: flex-start;
    border-radius: 22px;
  }

  .topbar__nav {
    flex-wrap: wrap;
  }

  .hero {
    padding: 28px 22px;
  }

  .panel {
    padding: 18px;
  }

  .panel__header--row,
  .section__head {
    flex-direction: column;
    align-items: flex-start;
  }

  .tool-grid,
  .tool-grid--compact {
    grid-template-columns: 1fr;
  }

  .tool-card__meta {
    flex-direction: column;
    align-items: flex-start;
  }

  .search-box {
    width: 100%;
  }
}