:root {
  --bg: #f7f9fc;
  --surface: #ffffff;
  --surface-soft: #eef4ff;
  --text: #142033;
  --muted: #637083;
  --line: #dfe6ef;
  --primary: #3157d5;
  --primary-dark: #2443ab;
  --success: #0d8a61;
  --shadow: 0 18px 50px rgba(29, 47, 76, 0.09);
  --radius: 18px;
  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
}

button,
input,
select {
  font: inherit;
}

.container {
  width: min(calc(100% - 32px), var(--container));
  margin-inline: auto;
}

.narrow {
  max-width: 780px;
}

.center {
  text-align: center;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  transform: translateY(-150%);
  background: var(--surface);
  padding: 10px 14px;
  border-radius: 8px;
}

.skip-link:focus {
  transform: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid rgba(223, 230, 239, 0.8);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
}

.header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 800;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.brand-mark {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border-radius: 11px;
  background: var(--primary);
  color: #fff;
}

.main-nav {
  display: flex;
  gap: 24px;
  margin-left: auto;
}

.main-nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 650;
}

.main-nav a:hover {
  color: var(--primary);
}

.language-select select {
  padding: 9px 32px 9px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
}

.menu-button {
  display: none;
  margin-left: auto;
}

.hero {
  padding: 86px 0;
  background:
    radial-gradient(circle at 85% 15%, rgba(49, 87, 213, 0.18), transparent 26%),
    linear-gradient(180deg, #fff, #f3f7ff);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 68px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--primary);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.16;
  letter-spacing: -0.035em;
}

h1 {
  margin: 0;
  font-size: clamp(2.6rem, 6vw, 5.1rem);
}

h2 {
  font-size: clamp(1.8rem, 3vw, 2.8rem);
}

.hero-copy,
.page-hero p {
  max-width: 680px;
  color: var(--muted);
  font-size: 1.15rem;
}

.hero-actions {
  margin-top: 30px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  border: 0;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 750;
  text-decoration: none;
}

.button-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 10px 28px rgba(49, 87, 213, 0.25);
}

.button-primary:hover {
  background: var(--primary-dark);
}

.button-secondary {
  background: #eef1f5;
  color: var(--text);
}

.trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 26px;
  color: var(--muted);
  font-size: 0.92rem;
}

.trust-row span::before {
  content: "✓";
  margin-right: 6px;
  color: var(--success);
  font-weight: 800;
}

.hero-panel,
.calculator-shell,
.sidebar-card,
.tool-card,
.price-card {
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.hero-panel {
  padding: 26px;
  border-radius: 24px;
}

.metric-card {
  padding: 25px;
  border-radius: 16px;
  background: var(--text);
  color: #fff;
}

.metric-card span,
.metric-grid span {
  display: block;
  color: #aab5c5;
  font-size: 0.85rem;
}

.metric-card strong {
  display: block;
  margin: 8px 0;
  font-size: 2.5rem;
}

.metric-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 14px;
}

.metric-grid div {
  padding: 20px;
  border-radius: 14px;
  background: var(--surface-soft);
}

.metric-grid strong {
  display: block;
  margin-top: 8px;
  font-size: 1.4rem;
}

.section {
  padding: 76px 0;
}

.section-soft {
  background: var(--surface-soft);
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 30px;
}

.section-heading h2 {
  margin: 0;
}

.text-link {
  color: var(--primary);
  font-weight: 750;
  text-decoration: none;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.tool-card,
.price-card {
  padding: 26px;
  border-radius: var(--radius);
}

.tool-card h3 {
  font-size: 1.25rem;
}

.tool-card h3 a {
  text-decoration: none;
}

.tool-card p {
  color: var(--muted);
}

.tool-icon {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border-radius: 12px;
  background: var(--surface-soft);
  color: var(--primary);
  font-weight: 900;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 380px));
  gap: 22px;
}

.featured-price {
  border: 2px solid var(--primary);
}

.badge {
  display: inline-block;
  margin: 0;
  padding: 4px 10px;
  border-radius: 99px;
  background: var(--surface-soft);
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 800;
}

.price {
  margin: 8px 0;
  font-size: 2.25rem;
  font-weight: 850;
}

.price small {
  color: var(--muted);
  font-size: 0.95rem;
}

.page-hero {
  padding: 66px 0;
  background: linear-gradient(180deg, #fff, #f4f7fb);
}

.page-hero h1 {
  font-size: clamp(2.2rem, 5vw, 4rem);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
  color: var(--muted);
  font-size: 0.9rem;
}

.breadcrumbs a {
  text-decoration: none;
}

.calculator-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 28px;
  align-items: start;
}

.calculator-shell,
.sidebar-card {
  padding: 30px;
  border-radius: var(--radius);
}

.usage-notice {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  padding: 12px 14px;
  border-radius: 12px;
  background: var(--surface-soft);
  color: var(--muted);
}

.usage-notice strong {
  display: grid;
  min-width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
}

.calculator-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 24px;
}

.calculator-form label > span {
  display: block;
  margin-bottom: 7px;
  font-weight: 750;
}

.input-prefix {
  display: flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  overflow: hidden;
}

.input-prefix > span {
  padding: 0 0 0 14px;
  color: var(--muted);
}

.input-prefix input {
  width: 100%;
  padding: 13px;
  border: 0;
  outline: 0;
  color: var(--text);
}

.input-prefix:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(49, 87, 213, 0.12);
}

.form-actions,
.form-error {
  grid-column: 1 / -1;
}

.form-actions {
  display: flex;
  gap: 12px;
}

.form-error {
  margin: 0;
  color: #b42318;
}

.results {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 28px;
}

.results article {
  padding: 20px;
  border-radius: 14px;
  background: var(--surface-soft);
}

.results span {
  display: block;
  color: var(--muted);
  font-size: 0.88rem;
}

.results strong {
  display: block;
  margin-top: 8px;
  font-size: 1.35rem;
}

.calculator-sidebar {
  position: sticky;
  top: 98px;
}

.sidebar-card h2 {
  margin-top: 0;
  font-size: 1.35rem;
}

.sidebar-card p,
.prose p {
  color: var(--muted);
}

.formula {
  margin-top: 10px;
  padding: 12px;
  border-radius: 10px;
  background: #f2f4f7;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.86rem;
}

.ad-slot {
  display: grid;
  min-height: 250px;
  margin-top: 24px;
  place-items: center;
  border: 1px dashed var(--line);
  color: var(--muted);
}

.prose h2 {
  margin-top: 36px;
}

.error-code {
  margin: 0;
  color: var(--primary);
  font-size: 5rem;
  font-weight: 900;
}

.site-footer {
  padding: 58px 0 26px;
  background: #101827;
  color: #d7deea;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 34px;
}

.site-footer h2 {
  margin-top: 0;
  color: #fff;
  font-size: 1rem;
}

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

.site-footer li + li {
  margin-top: 8px;
}

.site-footer a {
  color: #bac4d3;
  text-decoration: none;
}

.footer-brand {
  color: #fff !important;
}

.footer-bottom {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid #273348;
  color: #8f9aad;
  font-size: 0.9rem;
}

@media (max-width: 900px) {
  .hero-grid,
  .calculator-layout,
  .footer-grid {
    grid-template-columns: 1fr;
  }

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

  .calculator-sidebar {
    position: static;
  }

  .menu-button {
    display: inline-flex;
  }

  .main-nav {
    position: absolute;
    top: 72px;
    left: 16px;
    right: 16px;
    display: none;
    flex-direction: column;
    gap: 0;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--surface);
    box-shadow: var(--shadow);
  }

  .main-nav.is-open {
    display: flex;
  }

  .main-nav a {
    padding: 11px;
  }

  .language-select {
    margin-left: 0;
  }
}

@media (max-width: 640px) {
  .hero,
  .section {
    padding: 54px 0;
  }

  h1 {
    font-size: 2.65rem;
  }

  .tool-grid,
  .pricing-grid,
  .calculator-form,
  .results,
  .metric-grid {
    grid-template-columns: 1fr;
  }

  .section-heading {
    align-items: start;
    flex-direction: column;
  }

  .calculator-shell,
  .sidebar-card {
    padding: 21px;
  }

  .header-inner {
    gap: 12px;
  }

  .brand span:last-child {
    display: none;
  }

  .language-select select {
    max-width: 118px;
  }
}


.field-help {
  display: block;
  margin-top: 7px;
  color: var(--muted);
  font-size: 0.82rem;
}

.input-suffix {
  padding: 0 14px 0 0 !important;
}

.copy-status {
  grid-column: 1 / -1;
  margin: 0;
  color: var(--success);
  font-weight: 700;
}

.calculator-form:has(label:nth-of-type(3)) {
  grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 760px) {
  .calculator-form:has(label:nth-of-type(3)) {
    grid-template-columns: 1fr;
  }
}


.country-select select {
  max-width: 170px;
  padding: 9px 30px 9px 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
}

.country-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.country-facts span {
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  color: var(--muted);
  font-size: 0.86rem;
}

@media (max-width: 900px) {
  .country-select select {
    max-width: 125px;
  }
}

@media (max-width: 640px) {
  .country-select {
    display: none;
  }
}


/* Part16：单站品牌与用户体验增强 */
.brand-copy {
  display: grid;
  line-height: 1.1;
}
.brand-copy small {
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0;
}
.header-selectors {
  display: flex;
  gap: 8px;
}
.country-select select,
.language-select select {
  padding: 9px 32px 9px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
}
.button-ghost {
  border: 1px solid var(--line);
  background: rgba(255,255,255,.72);
  color: var(--text);
}
.button-light {
  background: #fff;
  color: var(--secondary, #142033);
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.hero-panel-header,
.calculator-shell-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 18px;
}
.hero-panel-header {
  color: var(--muted);
  font-size: .9rem;
  font-weight: 700;
}
.status-dot,
.privacy-badge {
  border-radius: 999px;
  background: #e9f8f2;
  color: var(--success);
  padding: 6px 10px;
  font-size: .76rem;
  font-weight: 800;
}
.hero-panel-link {
  display: inline-block;
  margin-top: 18px;
  color: var(--primary);
  font-weight: 750;
  text-decoration: none;
}
.stats-strip {
  padding: 28px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stats-grid div {
  display: grid;
  text-align: center;
}
.stats-grid strong {
  color: var(--primary);
  font-size: 1.7rem;
}
.stats-grid span {
  color: var(--muted);
  font-size: .9rem;
}
.platform-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.platform-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 16px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  text-decoration: none;
  transition: transform .18s ease, box-shadow .18s ease;
}
.platform-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.platform-card small {
  display: block;
  margin-top: 4px;
  color: var(--muted);
}
.platform-initial {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border-radius: 13px;
  background: var(--surface-soft);
  color: var(--primary);
  font-weight: 900;
}
.country-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.country-card {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  text-decoration: none;
}
.country-card span {
  color: var(--muted);
}
.section-dark {
  background: var(--text);
  color: #fff;
}
.section-dark .eyebrow {
  color: #90a8ff;
}
.section-dark p {
  color: #c5cfdd;
}
.cta-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}
.cta-panel h2 {
  margin: 0 0 10px;
}
.directory-controls {
  position: sticky;
  top: 84px;
  z-index: 10;
  margin-bottom: 28px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255,255,255,.96);
  box-shadow: 0 12px 35px rgba(29,47,76,.08);
  backdrop-filter: blur(14px);
}
.tool-search input {
  width: 100%;
  min-height: 52px;
  padding: 0 17px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--bg);
}
.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}
.filter-chip {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  padding: 8px 13px;
  cursor: pointer;
  color: var(--muted);
  font-weight: 700;
}
.filter-chip.is-active {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}
.directory-count {
  margin: 14px 0 0;
  color: var(--muted);
}
[data-tool-item][hidden] {
  display: none;
}
.empty-state {
  padding: 60px 20px;
  text-align: center;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
}
.calculator-benefits {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}
.calculator-benefits span {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  padding: 7px 11px;
  color: var(--muted);
  font-size: .83rem;
  font-weight: 700;
}
.field-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.tip-list {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
}
.tip-list li + li {
  margin-top: 8px;
}
.faq-list {
  display: grid;
  gap: 12px;
}
.faq-list details {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  padding: 18px 20px;
}
.faq-list summary {
  cursor: pointer;
  font-weight: 800;
}
.faq-list p {
  color: var(--muted);
}
.tool-platform {
  margin: 14px 0 0 !important;
  color: var(--primary) !important;
  font-size: .76rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.footer-grid {
  grid-template-columns: 1.4fr repeat(4, 1fr);
}
.footer-about p {
  max-width: 320px;
}
.footer-email {
  color: #fff;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
}
.legal-copy h2 {
  margin-top: 2.2em;
}
.legal-copy a {
  color: var(--primary);
}

@media (max-width: 980px) {
  .header-inner {
    flex-wrap: wrap;
    padding: 12px 0;
  }
  .brand-copy small {
    display: none;
  }
  .header-selectors {
    margin-left: auto;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .platform-grid {
    grid-template-columns: 1fr;
  }
  .country-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 720px) {
  .header-selectors {
    width: 100%;
    order: 4;
  }
  .header-selectors label {
    flex: 1;
  }
  .header-selectors select {
    width: 100%;
  }
  .hero {
    padding: 58px 0;
  }
  .hero-grid,
  .calculator-layout,
  .tool-grid,
  .pricing-grid,
  .field-grid {
    grid-template-columns: 1fr;
  }
  .stats-grid,
  .country-grid {
    grid-template-columns: 1fr 1fr;
  }
  .cta-panel {
    align-items: flex-start;
    flex-direction: column;
  }
  .directory-controls {
    position: static;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

:root{--primary:#5b5cf0;--primary-strong:#4748d8;--primary-soft:#efefff;--text:#101828;--text-soft:#344054;--muted:#667085;--line:#e6e8ef;--surface:#fff;--surface-soft:#f7f8fc;--background:#fbfcff;--shadow:0 20px 60px rgba(16,24,40,.12);--radius:20px;--container:1180px}
:root[data-theme=dark]{--text:#f8fafc;--text-soft:#d0d5dd;--muted:#98a2b3;--line:#293244;--surface:#111827;--surface-soft:#0d1421;--background:#080d16;--primary-soft:#20214a;--shadow:0 20px 60px rgba(0,0,0,.4)}
body{background:var(--background);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif}.container{width:min(calc(100% - 40px),var(--container))}.icon{stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.site-header{position:sticky;top:0;z-index:100;background:color-mix(in srgb,var(--background) 78%,transparent);backdrop-filter:blur(18px);border-bottom:1px solid transparent}.site-header.is-scrolled{border-color:var(--line);box-shadow:0 8px 30px rgba(16,24,40,.06)}.header-inner{min-height:72px;display:flex;align-items:center;gap:24px}.brand-mark{border-radius:12px;background:linear-gradient(135deg,var(--primary),#8b5cf6);box-shadow:0 10px 25px rgba(91,92,240,.28)}.main-nav{margin-left:auto;display:flex;align-items:center;gap:6px}.main-nav>a{padding:9px 11px;border-radius:9px;color:var(--text-soft);text-decoration:none}.nav-search{display:flex;align-items:center;gap:8px;padding:8px 10px;border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--muted);cursor:pointer}.nav-search kbd{padding:2px 5px;border:1px solid var(--line);border-radius:5px;font-size:.7rem}.header-actions{display:flex;gap:8px}.icon-button,.menu-button{display:grid;width:39px;height:39px;place-items:center;border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--text);cursor:pointer}.compact-select select{height:39px;border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--text)}:root[data-theme=light] [data-dark-icon],:root[data-theme=dark] [data-light-icon]{display:none}.hero-v2{position:relative;overflow:hidden;padding:105px 0 85px;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:64px 64px}.hero-v2:after{content:"";position:absolute;inset:0;background:linear-gradient(to bottom,transparent,var(--background));pointer-events:none}.hero-orb{position:absolute;width:600px;height:600px;right:-100px;top:-300px;border-radius:50%;background:radial-gradient(circle,rgba(91,92,240,.24),transparent 68%)}.hero-grid{position:relative;z-index:1;grid-template-columns:1fr 1fr;gap:70px;align-items:center}.hero-copy-block h1{font-size:clamp(3.2rem,6vw,5.7rem);line-height:.96;letter-spacing:-.065em;margin:18px 0 22px}.hero-copy-block h1 em{display:block;font-style:normal;background:linear-gradient(110deg,var(--primary),#8b5cf6,#14b8a6);background-clip:text;color:transparent}.hero-copy-block>p{font-size:1.14rem;line-height:1.75;color:var(--text-soft)}.hero-badge{display:inline-flex;padding:8px 12px;border:1px solid rgba(91,92,240,.2);border-radius:999px;background:rgba(91,92,240,.08);color:var(--primary);font-weight:750;font-size:.82rem}.hero-actions{display:flex;gap:12px;margin-top:30px}.button-large{min-height:52px;padding-inline:20px;border-radius:13px}.button{display:inline-flex;align-items:center;gap:9px}.button-primary{background:linear-gradient(135deg,var(--primary),var(--primary-strong));box-shadow:0 12px 30px rgba(91,92,240,.28)}.hero-trust{display:flex;flex-wrap:wrap;gap:16px;margin-top:28px;color:var(--muted);font-size:.8rem}.hero-trust span{display:flex;align-items:center;gap:6px}.product-preview{overflow:hidden;border:1px solid var(--line);border-radius:28px;background:var(--surface);box-shadow:var(--shadow);transform:perspective(1200px) rotateY(-5deg)}.window-bar{display:flex;align-items:center;gap:7px;padding:15px 18px;border-bottom:1px solid var(--line)}.window-bar i{width:9px;height:9px;border-radius:50%;background:#d0d5dd}.window-bar i:first-child{background:#f97066}.window-bar i:nth-child(2){background:#fdb022}.window-bar i:nth-child(3){background:#32d583}.window-bar span{margin-left:8px;color:var(--muted);font-size:.75rem}.preview-body{padding:25px}.preview-fields,.preview-results{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.preview-fields label,.preview-results article{padding:14px;border:1px solid var(--line);border-radius:13px;background:var(--surface-soft);color:var(--muted);font-size:.72rem}.preview-fields strong,.preview-results strong{display:block;margin-top:7px;color:var(--text);font-size:1.05rem}.preview-chart{height:165px;display:flex;align-items:end;gap:12px;padding:24px 10px 0;border-bottom:1px solid var(--line)}.preview-chart span{flex:1;border-radius:8px 8px 0 0;background:linear-gradient(to top,var(--primary),#8b5cf6)}.preview-chart span:nth-child(1){height:30%}.preview-chart span:nth-child(2){height:48%}.preview-chart span:nth-child(3){height:43%}.preview-chart span:nth-child(4){height:72%}.preview-chart span:nth-child(5){height:88%}.preview-results{grid-template-columns:repeat(3,1fr);margin-top:18px}.preview-results b{display:block;margin-top:5px;color:#079455;font-size:.68rem}.logo-cloud{padding:26px 0;border-block:1px solid var(--line);background:var(--surface)}.logo-cloud p{text-align:center;color:var(--muted);font-size:.75rem;text-transform:uppercase;letter-spacing:.12em}.logo-cloud>div>div{display:flex;flex-wrap:wrap;justify-content:center;gap:28px}.logo-cloud a{color:var(--text-soft);font-weight:800;text-decoration:none;opacity:.72}.section{padding:100px 0}.section-kicker{display:inline-block;margin-bottom:12px;color:var(--primary);font-size:.77rem;font-weight:850;letter-spacing:.12em;text-transform:uppercase}.section-heading h2{font-size:clamp(2.1rem,4vw,3.6rem);line-height:1.04;letter-spacing:-.045em}.section-heading p{color:var(--muted);font-size:1.02rem}.featured-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:40px}.featured-card{position:relative;min-height:285px;padding:25px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);transition:.25s}.featured-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}.featured-meta{display:flex;justify-content:space-between;align-items:center}.featured-meta>span{display:grid;width:46px;height:46px;place-items:center;border-radius:14px;background:var(--primary-soft);color:var(--primary);font-weight:900}.featured-meta small{color:var(--muted);text-transform:uppercase;letter-spacing:.08em}.featured-card h3{margin:28px 0 12px}.featured-card h3 a{color:var(--text);text-decoration:none}.featured-card p{color:var(--muted);line-height:1.7}.featured-card>a{position:absolute;left:25px;bottom:23px;display:flex;align-items:center;gap:7px;color:var(--primary);font-weight:760;text-decoration:none}.bento-section{background:radial-gradient(circle at 80% 0,rgba(91,92,240,.3),transparent 30%),#101828;color:#fff}.section-heading.light p{color:#aeb8c7}.bento-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:40px}.bento-card{min-height:285px;padding:28px;border:1px solid rgba(255,255,255,.1);border-radius:26px;background:rgba(255,255,255,.055)}.bento-large{grid-row:span 2}.bento-card p{color:#aeb8c7}.mini-list{display:grid;gap:10px;margin-top:28px}.mini-list a{display:flex;align-items:center;gap:10px;padding:12px;border:1px solid rgba(255,255,255,.08);border-radius:11px;background:rgba(255,255,255,.04);color:#fff;text-decoration:none}.mini-list span{display:grid;width:28px;height:28px;place-items:center;border-radius:8px;background:rgba(91,92,240,.2)}.country-pills{display:flex;flex-wrap:wrap;gap:8px;margin-top:24px}.country-pills a{display:grid;min-width:45px;height:38px;place-items:center;border:1px solid rgba(255,255,255,.12);border-radius:9px;color:#fff;text-decoration:none}.privacy-bars{height:100px;display:flex;align-items:end;gap:12px;margin-top:20px}.privacy-bars i{flex:1;border-radius:9px 9px 0 0;background:linear-gradient(to top,#5b5cf0,#2dd4a2)}.privacy-bars i:first-child{height:35%}.privacy-bars i:nth-child(2){height:70%}.privacy-bars i:nth-child(3){height:100%}.platform-grid-v2{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:38px}.platform-card-v2{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:15px;padding:20px;border:1px solid var(--line);border-radius:16px;background:var(--surface);color:var(--text);text-decoration:none;transition:.22s}.platform-card-v2:hover{transform:translateY(-3px);box-shadow:var(--shadow)}.platform-card-v2>span{display:grid;width:44px;height:44px;place-items:center;border-radius:13px;background:var(--primary-soft);color:var(--primary);font-weight:900}.platform-card-v2 small{display:block;margin-top:4px;color:var(--muted)}.testimonial-section{background:var(--surface-soft)}.section-heading.centered{text-align:center;justify-content:center}.testimonial-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:40px}.testimonial-card{padding:26px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface)}.testimonial-card>b{color:#f79009}.testimonial-card blockquote{margin:18px 0 24px;color:var(--text-soft);line-height:1.7}.testimonial-card footer{display:flex;align-items:center;gap:10px}.testimonial-card footer span{display:grid;width:38px;height:38px;place-items:center;border-radius:50%;background:var(--primary-soft);color:var(--primary);font-weight:900}.final-cta{display:flex;align-items:center;justify-content:space-between;gap:40px;padding:46px;border-radius:30px;background:linear-gradient(135deg,var(--primary),#6d28d9);color:#fff;box-shadow:0 28px 80px rgba(91,92,240,.3)}.final-cta h2{font-size:clamp(2rem,4vw,3.2rem);letter-spacing:-.045em}.final-cta p{color:#e7e8ff}.command-overlay{position:fixed;inset:0;z-index:200;display:grid;place-items:start center;padding:10vh 20px;background:rgba(7,10,18,.68);backdrop-filter:blur(10px)}.command-overlay[hidden]{display:none}.command-dialog{width:min(680px,100%);overflow:hidden;border:1px solid var(--line);border-radius:20px;background:var(--surface);box-shadow:var(--shadow)}.command-search{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:12px;padding:17px;border-bottom:1px solid var(--line)}.command-search input{border:0;outline:0;background:transparent;color:var(--text)}.command-search button{border:0;background:transparent;color:var(--text)}.command-results{max-height:430px;overflow:auto;padding:8px}.command-results a{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:12px;padding:11px;border-radius:10px;color:var(--text);text-decoration:none}.command-results a:hover{background:var(--surface-soft)}.command-results>a>span{display:grid;width:34px;height:34px;place-items:center;border-radius:9px;background:var(--primary-soft);color:var(--primary);font-weight:850}.command-results small{display:block;color:var(--muted)}.command-empty{text-align:center;color:var(--muted);padding:24px}.reveal{opacity:0;transform:translateY(18px);transition:opacity .65s,transform .65s}.reveal.is-visible{opacity:1;transform:none}@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}
@media(max-width:1000px){.hero-grid{grid-template-columns:1fr}.hero-copy-block{text-align:center}.hero-actions,.hero-trust{justify-content:center}.product-preview{max-width:700px;margin:auto;transform:none}.featured-grid,.testimonial-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:820px){.main-nav{position:absolute;top:68px;left:20px;right:20px;display:none;flex-direction:column;padding:12px;border:1px solid var(--line);border-radius:14px;background:var(--surface);box-shadow:var(--shadow)}.main-nav.is-open{display:flex}.menu-button{display:grid}.bento-grid,.platform-grid-v2{grid-template-columns:1fr}.bento-large{grid-row:auto}.final-cta{align-items:flex-start;flex-direction:column}}@media(max-width:640px){.container{width:min(calc(100% - 28px),var(--container))}.hero-v2{padding:72px 0 60px}.hero-copy-block h1{font-size:clamp(2.8rem,15vw,4.3rem)}.hero-actions{flex-direction:column}.hero-actions .button{width:100%}.preview-fields,.preview-results,.featured-grid,.testimonial-grid{grid-template-columns:1fr}.section{padding:74px 0}.final-cta{padding:30px}.brand-copy small{display:none}}


/* Production audit: calculator mobile usability and touch accessibility */
.calculator-estimate-notice{margin:18px 0 0;padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:var(--surface-soft);color:var(--muted);font-size:.86rem;line-height:1.55}
.calculator-form input{min-height:48px;font-size:16px}
.form-actions .button{min-height:46px}
.results strong{overflow-wrap:anywhere}
@media (max-width:640px){
  .calculator-shell-heading{align-items:flex-start;flex-direction:column;gap:10px}
  .calculator-form .field-grid{grid-template-columns:1fr!important}
  .form-actions{display:grid;grid-template-columns:1fr;gap:10px}
  .form-actions .button{width:100%;justify-content:center}
  .results{grid-template-columns:1fr!important}
  .input-prefix{width:100%}
  .input-prefix input{min-width:0;width:100%}
  .calculator-benefits{gap:8px}
  .calculator-benefits span{font-size:.78rem}
}


/* 生产级内容模块 */
.content-steps { display: grid; gap: .75rem; padding-left: 1.35rem; }
.example-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 1rem; margin-top: 1.25rem; }
.example-card { background: var(--surface, #fff); border: 1px solid var(--border, #dfe5ec); border-radius: 16px; padding: 1.25rem; }
.example-card dl { margin: 0; }
.example-card dl div { display:flex; justify-content:space-between; gap:1rem; padding:.6rem 0; border-bottom:1px solid var(--border, #e7ebf0); }
.example-card dl div:last-child { border-bottom:0; }
.example-card dt { font-weight:600; }
.example-card dd { margin:0; text-align:right; font-variant-numeric:tabular-nums; }
.example-note,.review-note { font-size:.92rem; opacity:.8; margin-top:1rem; }
.reference-list { display:grid; gap:1rem; }
.reference-list article { border-left:3px solid currentColor; padding-left:1rem; }
.reference-list h3 { margin:0 0 .25rem; font-size:1.05rem; }
.reference-list p { margin:0; }
@media (max-width: 700px) { .example-grid { grid-template-columns:1fr; } .example-card dl div { align-items:flex-start; } }


/* 全站广告系统：响应式尺寸、版面预留和移动端安全区 */
.site-ad{width:min(calc(100% - 32px),1120px);min-height:110px;margin:28px auto;display:flex;flex-direction:column;align-items:center;justify-content:center;overflow:hidden;position:relative;text-align:center;contain:layout paint;background:transparent}
.site-ad-label{display:block;margin-bottom:7px;color:var(--muted);font-size:10px;line-height:1;text-transform:uppercase;letter-spacing:.09em}
.site-ad-content{width:100%;display:flex;align-items:center;justify-content:center;overflow:hidden}
.site-ad-content>*{max-width:100%}
.site-ad-wide{min-height:110px}
.site-ad-rectangle{max-width:760px;min-height:280px}
.site-ad-sidebar{width:100%;min-height:600px;margin:22px 0;position:sticky;top:92px}
.site-ad-mobile-anchor{display:none}
@media(max-width:1000px){.site-ad-sidebar{display:none}}
@media(max-width:760px){
  body.has-mobile-ad{padding-bottom:112px}
  .site-ad{width:min(calc(100% - 24px),100%);margin:20px auto;min-height:100px}
  .site-ad-rectangle{min-height:250px}
  .site-ad-mobile-anchor{display:flex;position:fixed;z-index:120;left:0;right:0;bottom:0;width:100%;height:auto;min-height:100px;max-height:120px;margin:0;padding:4px 8px max(4px,env(safe-area-inset-bottom));border-top:1px solid var(--line);background:var(--surface);box-shadow:0 -8px 30px rgba(0,0,0,.12);contain:none}
  .site-ad-mobile-anchor .site-ad-label{position:absolute;top:2px;left:6px;margin:0;font-size:8px}
}