:root {
  color-scheme: light;
  --ink: #182320;
  --muted: #5f6f69;
  --paper: #fbfbf7;
  --surface: #ffffff;
  --surface-soft: #f1f6f3;
  --line: #dce6e0;
  --teal: #0d766e;
  --teal-dark: #07524c;
  --amber: #f0b446;
  --coral: #df6d55;
  --blue: #3f74b5;
  --shadow: 0 16px 42px rgba(31, 47, 42, 0.1);
  --radius: 8px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

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

img {
  display: block;
  max-width: 100%;
}

button,
input {
  font: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px 56px;
  background: rgba(251, 251, 247, 0.94);
  border-bottom: 1px solid rgba(220, 230, 224, 0.9);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  flex: none;
  border-radius: var(--radius);
  background: var(--ink);
  color: #fff;
  font-weight: 900;
}

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

.brand-copy strong {
  font-size: 1rem;
  line-height: 1.1;
}

.brand-copy small {
  color: var(--muted);
  font-size: 0.76rem;
}

.nav-links,
.site-footer nav {
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--muted);
  font-size: 0.92rem;
}

.nav-links a:hover,
.nav-links a:focus-visible,
.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--teal);
}

.header-action,
.button {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  font-weight: 800;
}

.header-action {
  padding: 0 16px;
  background: var(--ink);
  color: #fff;
}

.button {
  padding: 0 18px;
  border: 1px solid var(--line);
  background: var(--surface);
}

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

.button.primary:hover,
.button.primary:focus-visible {
  background: var(--teal-dark);
}

.button.secondary:hover,
.button.secondary:focus-visible {
  border-color: var(--teal);
  color: var(--teal);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(360px, 0.94fr);
  gap: 52px;
  align-items: center;
  min-height: min(760px, calc(100vh - 140px));
  padding: 58px 56px 44px;
  background: var(--surface-soft);
  border-bottom: 1px solid var(--line);
}

.hero-copy {
  max-width: 760px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--teal);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 18px;
  max-width: 760px;
  font-size: 3.8rem;
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 12px;
  font-size: 2.25rem;
  line-height: 1.2;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 1.18rem;
  line-height: 1.35;
  letter-spacing: 0;
}

.hero-text {
  max-width: 660px;
  color: var(--muted);
  font-size: 1.08rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0;
}

.quick-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  max-width: 590px;
  margin: 0;
}

.quick-stats div {
  padding: 14px 16px;
  border-left: 3px solid var(--amber);
  background: rgba(255, 255, 255, 0.72);
}

.quick-stats div:nth-child(2) {
  border-color: var(--coral);
}

.quick-stats div:nth-child(3) {
  border-color: var(--blue);
}

.quick-stats dt {
  font-size: 1.4rem;
  font-weight: 900;
}

.quick-stats dd {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.hero-visual {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.hero-visual img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.finder,
.guides,
.workflow,
.contact {
  padding: 64px 56px;
}

.section-heading {
  max-width: 820px;
  margin-bottom: 26px;
}

.section-heading p:not(.eyebrow),
.contact p {
  color: var(--muted);
}

.section-heading.compact {
  margin-bottom: 24px;
}

.filter-panel {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) auto;
  gap: 18px;
  align-items: end;
  margin-bottom: 22px;
}

.search-box {
  display: grid;
  gap: 8px;
}

.search-box span {
  color: var(--muted);
  font-size: 0.9rem;
}

.search-box input {
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  padding: 0 16px;
  outline: none;
}

.search-box input:focus {
  border-color: rgba(13, 118, 110, 0.56);
  box-shadow: 0 0 0 4px rgba(13, 118, 110, 0.09);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.chip {
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--muted);
  padding: 0 12px;
  cursor: pointer;
}

.chip:hover,
.chip:focus-visible,
.chip.active {
  border-color: rgba(13, 118, 110, 0.45);
  background: #e7f3ef;
  color: var(--teal-dark);
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.tool-card,
.guide-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 9px 24px rgba(31, 47, 42, 0.055);
}

.tool-card {
  display: grid;
  gap: 12px;
  min-height: 214px;
  padding: 20px;
}

.tool-card.hidden {
  display: none;
}

.tool-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 12px;
}

.tool-head h3 {
  margin: 0;
}

.tool-badge {
  display: inline-flex;
  min-height: 26px;
  align-items: center;
  border-radius: 999px;
  background: #fff1d5;
  color: #8a5a08;
  padding: 0 10px;
  flex: none;
  font-size: 0.76rem;
  font-weight: 800;
}

.tool-card:nth-child(3n + 1) .tool-badge {
  background: #e6f3f1;
  color: var(--teal-dark);
}

.tool-card:nth-child(3n + 2) .tool-badge {
  background: #eaf1fb;
  color: #315d92;
}

.tool-card p,
.guide-card p,
.workflow-list p {
  margin: 0;
  color: var(--muted);
}

.tool-card a,
.guide-card a,
.article-main a {
  color: var(--teal);
  font-weight: 900;
}

.tool-card a {
  align-self: end;
}

.tool-card a:hover,
.tool-card a:focus-visible,
.guide-card a:hover,
.guide-card a:focus-visible,
.article-main a:hover,
.article-main a:focus-visible {
  color: var(--teal-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.empty-state {
  margin: 18px 0 0;
  padding: 16px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  color: var(--muted);
}

.guides {
  background: #f6f3e8;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.guide-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 16px;
}

.guide-card {
  display: flex;
  min-height: 270px;
  flex-direction: column;
  padding: 24px;
}

.guide-card.featured {
  border-top: 4px solid var(--coral);
}

.guide-card:nth-child(2) {
  border-top: 4px solid var(--blue);
}

.guide-card:nth-child(3) {
  border-top: 4px solid var(--amber);
}

.guide-card .guide-meta {
  margin-bottom: 18px;
  color: var(--teal-dark);
  font-size: 0.82rem;
  font-weight: 800;
}

.guide-card h3 {
  font-size: 1.3rem;
}

.guide-card a {
  margin-top: auto;
  padding-top: 20px;
}

.workflow {
  background: var(--paper);
}

.workflow-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.workflow-list li {
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 16px;
  min-height: 238px;
  padding: 24px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-left: 1px solid var(--line);
  background: #fff;
}

.workflow-list li:last-child {
  border-right: 1px solid var(--line);
}

.workflow-list span {
  color: var(--coral);
  font-size: 1.45rem;
  font-weight: 900;
}

.contact {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
  background: var(--ink);
  color: #fff;
}

.contact > div:first-child {
  max-width: 760px;
}

.contact .eyebrow {
  color: var(--amber);
}

.contact p {
  margin-bottom: 0;
  color: #c9d5cf;
}

.contact-box {
  display: grid;
  min-width: 260px;
  gap: 3px;
  padding: 18px 22px;
  border: 1px solid #52615b;
  border-radius: var(--radius);
  background: #22302c;
}

.contact-box small,
.contact-box span {
  color: #b9c8c1;
}

.contact-box strong {
  font-size: 1.42rem;
  overflow-wrap: anywhere;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding: 24px 56px 32px;
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer p {
  margin: 0;
}

/* Guide pages */
.article-hero {
  padding: 64px 56px 42px;
  background: var(--surface-soft);
  border-bottom: 1px solid var(--line);
}

.article-hero-inner {
  max-width: 960px;
  margin: 0 auto;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
  color: var(--muted);
  font-size: 0.88rem;
}

.breadcrumbs a:hover,
.breadcrumbs a:focus-visible {
  color: var(--teal);
}

.article-hero h1 {
  max-width: 900px;
  font-size: 3.15rem;
}

.article-lead {
  max-width: 800px;
  color: var(--muted);
  font-size: 1.1rem;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 24px;
  color: var(--muted);
  font-size: 0.86rem;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 760px) 260px;
  gap: 56px;
  justify-content: center;
  align-items: start;
  padding: 56px;
}

.article-main {
  min-width: 0;
}

.article-main > h2 {
  margin-top: 52px;
  padding-top: 8px;
  font-size: 1.85rem;
}

.article-main > h2:first-child {
  margin-top: 0;
}

.article-main h3 {
  margin-top: 32px;
}

.article-main p,
.article-main li {
  color: #40504a;
}

.article-main ul,
.article-main ol {
  padding-left: 22px;
}

.article-main li + li {
  margin-top: 9px;
}

.article-aside {
  position: sticky;
  top: 92px;
  padding-left: 20px;
  border-left: 2px solid var(--line);
}

.article-aside strong {
  display: block;
  margin-bottom: 10px;
}

.article-aside nav {
  display: grid;
  gap: 9px;
  color: var(--muted);
  font-size: 0.88rem;
}

.article-aside a:hover,
.article-aside a:focus-visible {
  color: var(--teal);
}

.takeaway,
.template-block,
.source-note {
  margin: 28px 0;
  padding: 20px;
  border-radius: var(--radius);
}

.takeaway {
  border-left: 4px solid var(--teal);
  background: #edf6f2;
}

.takeaway strong,
.template-block strong {
  display: block;
  margin-bottom: 6px;
}

.template-block {
  border: 1px solid #ead6a9;
  background: #fffaf0;
}

.template-block p:last-child,
.takeaway p:last-child,
.source-note p:last-child {
  margin-bottom: 0;
}

.source-note {
  border: 1px solid var(--line);
  background: #f7f9f8;
  color: var(--muted);
  font-size: 0.9rem;
}

.comparison-wrap {
  width: 100%;
  margin: 26px 0;
  overflow-x: auto;
}

.comparison-table {
  width: 100%;
  min-width: 650px;
  border-collapse: collapse;
  background: #fff;
}

.comparison-table th,
.comparison-table td {
  padding: 14px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.comparison-table th {
  background: var(--surface-soft);
}

.article-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 56px;
  padding: 26px;
  border-top: 4px solid var(--amber);
  background: var(--ink);
  color: #fff;
}

.article-cta h2 {
  margin: 0 0 6px;
  font-size: 1.45rem;
}

.article-cta p {
  margin: 0;
  color: #c9d5cf;
}

.article-cta strong {
  flex: none;
  font-size: 1.12rem;
}

@media (max-width: 1080px) {
  .site-header,
  .hero,
  .finder,
  .guides,
  .workflow,
  .contact,
  .site-footer,
  .article-hero,
  .article-layout {
    padding-left: 28px;
    padding-right: 28px;
  }

  .hero,
  .filter-panel {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-visual {
    max-width: 720px;
  }

  .chips {
    justify-content: flex-start;
  }

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

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

  .guide-card.featured {
    grid-column: 1 / -1;
  }

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

  .workflow-list li:nth-child(2) {
    border-right: 1px solid var(--line);
  }

  .article-layout {
    grid-template-columns: minmax(0, 760px);
  }

  .article-aside {
    display: none;
  }
}

@media (max-width: 760px) {
  .site-header {
    padding: 12px 16px;
    gap: 12px;
  }

  .nav-links {
    display: none;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
  }

  .header-action {
    min-height: 38px;
    padding: 0 11px;
    font-size: 0.84rem;
  }

  .hero,
  .finder,
  .guides,
  .workflow,
  .contact,
  .site-footer,
  .article-hero,
  .article-layout {
    padding-left: 16px;
    padding-right: 16px;
  }

  .hero {
    gap: 30px;
    padding-top: 28px;
    padding-bottom: 28px;
  }

  h1,
  .article-hero h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 1.82rem;
  }

  .quick-stats {
    display: none;
  }

  .tool-grid,
  .guide-grid,
  .workflow-list {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    margin: 20px 0 0;
  }

  .hero-visual img {
    aspect-ratio: 16 / 9;
    object-position: top;
  }

  .guide-card.featured {
    grid-column: auto;
  }

  .workflow-list li,
  .workflow-list li:nth-child(2) {
    min-height: 0;
    border-right: 1px solid var(--line);
    border-bottom: 0;
  }

  .workflow-list li:last-child {
    border-bottom: 1px solid var(--line);
  }

  .contact,
  .site-footer,
  .article-cta {
    align-items: flex-start;
    flex-direction: column;
  }

  .contact-box {
    width: 100%;
    min-width: 0;
  }

  .site-footer nav {
    gap: 18px;
  }

  .article-layout {
    padding-top: 36px;
  }

  .article-main > h2 {
    margin-top: 40px;
  }

  .article-cta strong {
    overflow-wrap: anywhere;
  }
}