:root {
  --page-bg: #f4faf7;
  --surface: #ffffff;
  --surface-soft: #eef8f3;
  --border: #d9e9e1;
  --text: #20332b;
  --muted: #62766d;
  --brand: #2f8f68;
  --brand-dark: #1c6d50;
  --blue: #2563eb;
  --amber: #b7791f;
  --rose: #be123c;
  --shadow: 0 12px 30px rgba(22, 58, 44, 0.08);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  min-width: 320px;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background: var(--page-bg);
  font-family: "Segoe UI", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.6;
  letter-spacing: 0;
}

a {
  color: inherit;
}

button,
input {
  font: inherit;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(244, 250, 247, 0.94);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}

.header-inner,
.page-shell,
.site-footer {
  width: min(1120px, calc(100vw - 32px));
  margin: 0 auto;
}

.header-inner {
  display: grid;
  grid-template-columns: auto minmax(240px, 420px) auto;
  gap: 18px;
  align-items: center;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--brand-dark);
  font-size: 1.25rem;
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}

.brand-mark {
  position: relative;
  width: 28px;
  height: 22px;
  border-radius: 6px;
  background: var(--brand);
  box-shadow: inset 0 -7px 0 rgba(255, 255, 255, 0.24);
}

.brand-mark::before {
  content: "";
  position: absolute;
  left: 7px;
  top: -6px;
  width: 14px;
  height: 8px;
  border: 3px solid #d69e2e;
  border-bottom: 0;
  border-radius: 5px 5px 0 0;
}

.search-form {
  position: relative;
  width: 100%;
}

.search-form::before {
  content: "⌕";
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-52%);
  color: var(--muted);
  font-size: 1.05rem;
  pointer-events: none;
}

.search-form input {
  width: 100%;
  height: 40px;
  padding: 0 44px 0 38px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  outline: 0;
}

.search-form input:focus {
  border-color: rgba(47, 143, 104, 0.68);
  box-shadow: 0 0 0 3px rgba(47, 143, 104, 0.13);
}

.icon-button {
  position: absolute;
  right: 7px;
  top: 50%;
  width: 28px;
  height: 28px;
  display: inline-grid;
  place-items: center;
  color: var(--muted);
  background: transparent;
  border: 0;
  border-radius: 6px;
  cursor: pointer;
}

.icon-button:hover {
  color: var(--text);
  background: var(--surface-soft);
}

.top-nav {
  display: flex;
  justify-content: flex-end;
  gap: 4px;
  white-space: nowrap;
}

.top-nav a {
  padding: 8px 12px;
  color: var(--muted);
  border-radius: 8px;
  font-size: 0.95rem;
  text-decoration: none;
}

.top-nav a:hover,
.top-nav a.active {
  color: var(--brand-dark);
  background: var(--surface-soft);
}

.page-shell {
  padding: 28px 0 42px;
}

.page-intro {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  padding: 22px 0 18px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 6px;
  color: var(--brand-dark);
  font-size: 0.76rem;
  font-weight: 800;
}

.page-intro h1 {
  margin: 0;
  font-size: 2.15rem;
  line-height: 1.22;
}

.intro-text {
  max-width: 560px;
  margin: 9px 0 0;
  color: var(--muted);
  font-size: 1rem;
}

.summary-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(74px, 1fr));
  gap: 8px;
  margin: 0;
}

.summary-list div {
  min-width: 86px;
  padding: 10px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  text-align: center;
}

.summary-list dt {
  color: var(--brand-dark);
  font-size: 1.22rem;
  font-weight: 800;
}

.summary-list dd {
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.category-strip {
  margin: 10px 0 22px;
  padding: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.category-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.category-tab {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 11px;
  color: var(--muted);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 8px;
  cursor: pointer;
}

.category-tab b {
  min-width: 20px;
  padding: 1px 6px;
  color: var(--brand-dark);
  background: var(--surface-soft);
  border-radius: 999px;
  font-size: 0.75rem;
  line-height: 1.5;
}

.category-tab:hover,
.category-tab.active {
  color: var(--brand-dark);
  background: var(--surface-soft);
  border-color: rgba(47, 143, 104, 0.24);
}

.tools-section {
  padding: 20px 0 0;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}

.section-head h2 {
  margin: 0;
  font-size: 1.45rem;
}

.result-count {
  margin: 0;
  color: var(--muted);
  white-space: nowrap;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.tool-card {
  min-height: 204px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 8px 22px rgba(31, 76, 58, 0.06);
  transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.tool-card:hover {
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
  box-shadow: 0 14px 28px rgba(31, 76, 58, 0.1);
  transform: translateY(-2px);
}

.tool-card-head,
.tool-title-line,
.tool-card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.tool-icon {
  width: 46px;
  height: 46px;
  display: inline-grid;
  place-items: center;
  flex: 0 0 auto;
  color: #ffffff;
  background: var(--accent);
  border-radius: 8px;
  font-size: 0.78rem;
  font-weight: 900;
  overflow: hidden;
  white-space: nowrap;
}

.favorite-button {
  width: 34px;
  height: 34px;
  display: inline-grid;
  place-items: center;
  flex: 0 0 auto;
  color: var(--amber);
  background: #fffaf0;
  border: 1px solid #f6d69b;
  border-radius: 8px;
  cursor: pointer;
  line-height: 1;
}

.favorite-button:hover,
.favorite-button[aria-pressed="true"] {
  color: #ffffff;
  background: var(--amber);
  border-color: var(--amber);
}

.tool-card-body {
  padding: 13px 0 12px;
}

.tool-title-line {
  align-items: flex-start;
  margin-bottom: 7px;
}

.tool-title-line h3 {
  min-width: 0;
  margin: 0;
  font-size: 1rem;
  line-height: 1.35;
}

.tool-title-line span {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 0.82rem;
}

.tool-card-body p {
  display: -webkit-box;
  min-height: 44px;
  margin: 0;
  overflow: hidden;
  color: var(--muted);
  font-size: 0.92rem;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.tool-tags {
  min-width: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tool-tags span {
  max-width: 90px;
  padding: 2px 7px;
  overflow: hidden;
  color: color-mix(in srgb, var(--accent) 68%, #26352f);
  background: color-mix(in srgb, var(--accent) 10%, #ffffff);
  border-radius: 999px;
  font-size: 0.76rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tool-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 54px;
  height: 32px;
  flex: 0 0 auto;
  color: var(--brand-dark);
  background: var(--surface-soft);
  border: 1px solid rgba(47, 143, 104, 0.18);
  border-radius: 8px;
  font-size: 0.88rem;
  font-weight: 700;
  text-decoration: none;
}

.tool-link:hover {
  color: #ffffff;
  background: var(--brand);
  border-color: var(--brand);
}

.tool-link[aria-disabled="true"] {
  color: #8a9b93;
  background: #f2f6f4;
  border-color: #e1ebe6;
  cursor: default;
  pointer-events: none;
}

.empty-state {
  padding: 36px 16px;
  color: var(--muted);
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: 8px;
  text-align: center;
}

.empty-state strong,
.empty-state span {
  display: block;
}

.empty-state strong {
  color: var(--text);
  margin-bottom: 4px;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0 30px;
  color: var(--muted);
  border-top: 1px solid var(--border);
  font-size: 0.92rem;
}

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

@media (max-width: 920px) {
  .header-inner {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 12px 0;
  }

  .top-nav {
    justify-content: flex-start;
  }

  .page-intro {
    align-items: flex-start;
    flex-direction: column;
  }

  .tools-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .header-inner,
  .page-shell,
  .site-footer {
    width: min(100% - 24px, 1120px);
  }

  .page-shell {
    padding-top: 18px;
  }

  .page-intro h1 {
    font-size: 1.7rem;
  }

  .summary-list {
    width: 100%;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .summary-list div {
    min-width: 0;
    padding: 9px 8px;
  }

  .section-head,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .tool-card {
    min-height: 188px;
  }
}