@import url("https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800&family=Noto+Sans+SC:wght@400;500;700;800&family=IBM+Plex+Mono:wght@400;500&display=swap");

:root {
  color-scheme: light;
  --bg: #ffffff;
  --bg-elevated: rgba(255, 255, 255, 0.96);
  --bg-soft: #f7f7f8;
  --card: #ffffff;
  --card-strong: #fafafa;
  --border: #e5e7eb;
  --border-strong: #d1d5db;
  --text: #151515;
  --text-soft: #52525b;
  --text-faint: #71717a;
  --accent: #151515;
  --accent-strong: #000000;
  --success: #1f7a46;
  --shadow: none;
  --radius-lg: 12px;
  --radius-md: 10px;
  --radius-sm: 8px;
  --container: 1240px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Manrope", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: #ffffff;
  min-height: 100vh;
}

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

img {
  max-width: 100%;
}

.site-shell {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--border);
}

.site-header__inner,
.site-main,
.site-footer__inner {
  width: min(calc(100% - 32px), var(--container));
  margin: 0 auto;
}

.site-header__inner {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  font-family: "Manrope", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

.brand--app {
  gap: 12px;
  font-size: 1.16rem;
  font-weight: 600;
  letter-spacing: -0.03em;
}

.brand__mark {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 1px 2px rgba(226, 232, 240, 0.7);
  border: 1px solid rgba(226, 232, 240, 0.7);
  color: var(--accent);
  font-size: 0.95rem;
}

.brand__icon {
  width: 20px;
  height: 20px;
  object-fit: contain;
}

.brand__label {
  color: #0f172a;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  padding: 3px;
  border-radius: 999px;
  background: #ffffff;
  border: 1px solid var(--border);
}

.lang-switch__item {
  min-width: 56px;
  text-align: center;
  padding: 7px 12px;
  border-radius: 999px;
  color: var(--text-soft);
  font-size: 0.88rem;
}

.lang-switch__item.is-active {
  color: var(--text);
  background: #f4f4f5;
  font-weight: 600;
}

.lang-switch__item.is-disabled {
  opacity: 0.56;
  cursor: not-allowed;
}

.nav-link {
  color: var(--text-soft);
  padding: 8px 4px;
  border-radius: 999px;
  transition: color 160ms ease;
}

.nav-link:hover,
.nav-link.is-current {
  color: var(--text);
  background: transparent;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 15px;
  border-radius: 999px;
  color: #ffffff;
  background: #111111;
  font-weight: 600;
}

.site-main {
  padding: 34px 0 52px;
}

.site-main--pricing {
  padding-top: 24px;
}

.hero {
  display: grid;
  gap: 12px;
  margin-bottom: 22px;
}

.hero--centered {
  justify-items: center;
  text-align: center;
  margin-bottom: 32px;
}

.hero--centered .hero__desc,
.hero--centered .hero__meta {
  margin-inline: auto;
}

.eyebrow {
  display: inline-block;
  width: fit-content;
  color: var(--text-faint);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero__title {
  margin: 0;
  font-size: clamp(2rem, 4.5vw, 3rem);
  line-height: 1.02;
  letter-spacing: -0.04em;
  font-family: "Manrope", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

.hero__desc {
  max-width: 760px;
  margin: 0;
  color: var(--text-soft);
  font-size: 1rem;
  line-height: 1.65;
}

.hero__meta {
  color: var(--text-faint);
  font-size: 0.9rem;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 136px;
  padding: 11px 18px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #ffffff;
  color: var(--text);
  font-weight: 600;
  font-family: "Manrope", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

.button--primary {
  background: #5f61ff;
  border-color: #5f61ff;
  color: #ffffff;
}

.button--secondary {
  background: #ffffff;
  color: #6b68d6;
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.update-timeline {
  --timeline-offset: 42px;
  --timeline-line-left: 13px;
  --timeline-dot-size: 10px;
  position: relative;
  gap: 18px;
  padding-left: var(--timeline-offset);
}

.update-timeline::before {
  content: "";
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: var(--timeline-line-left);
  width: 1px;
  background: #d9dde5;
}

.update-entry {
  position: relative;
}

.update-entry.panel {
  overflow: visible;
}

.update-entry__dot {
  position: absolute;
  top: 22px;
  left: calc(var(--timeline-line-left) - var(--timeline-offset) - (var(--timeline-dot-size) / 2));
  width: var(--timeline-dot-size);
  height: var(--timeline-dot-size);
  border-radius: 999px;
  background: #e8ebf3;
  z-index: 2;
}

.content-grid--pricing {
  gap: 28px;
}

.article-layout {
  max-width: 820px;
  margin: 0 auto;
}

.article-header {
  margin-bottom: 24px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--text-faint);
  font-size: 0.92rem;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.tag-chip {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #fafafa;
  color: var(--text-soft);
  font-size: 0.84rem;
}

.article-body {
  color: var(--text-soft);
}

.article-lead {
  margin: 0 0 22px;
  color: var(--text-soft);
  font-size: 1.05rem;
  line-height: 1.85;
}

.article-body h2 {
  margin: 30px 0 12px;
  color: var(--text);
  font-size: 1.35rem;
  letter-spacing: -0.03em;
}

.article-body p {
  margin: 0 0 14px;
  line-height: 1.85;
}

.article-body ul,
.article-body ol {
  margin: 0 0 14px;
  padding-left: 22px;
}

.article-body li {
  margin: 8px 0;
  line-height: 1.8;
}

.blog-list {
  display: grid;
  gap: 16px;
}

.blog-card {
  display: block;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: #ffffff;
  padding: 22px;
}

.blog-card:hover {
  border-color: var(--border-strong);
}

.blog-card__meta {
  color: var(--text-faint);
  font-size: 0.9rem;
  margin-bottom: 10px;
}

.blog-card__title {
  margin: 0 0 10px;
  color: var(--text);
  font-size: 1.3rem;
  letter-spacing: -0.03em;
}

.blog-card__excerpt {
  margin: 0 0 14px;
  color: var(--text-soft);
  line-height: 1.75;
}

.blog-card__footer {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.blog-entry__header {
  display: grid;
  gap: 10px;
}

.blog-entry {
  transition: border-color 160ms ease, background-color 160ms ease;
}

.blog-entry:hover {
  border-color: var(--border-strong);
}

.blog-entry-card {
  display: block;
  color: inherit;
}

.blog-entry__title {
  margin: 0;
  font-size: 1.55rem;
  letter-spacing: -0.04em;
}

.blog-entry__summary {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.8;
}

.blog-entry__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.blog-entry__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.blog-entry__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  font-weight: 600;
}

.blog-entry__cta-icon {
  font-size: 0.95rem;
  line-height: 1;
}

.blog-entry:hover .blog-entry__title,
.blog-entry:hover .blog-entry__cta {
  color: var(--accent-strong);
}

.panel {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.panel--flat {
  background: transparent;
  border: 0;
  border-radius: 0;
}

.panel__inner {
  padding: 24px;
}

.panel--flat .panel__inner {
  padding: 0;
}

.panel h2,
.panel h3,
.panel h4 {
  letter-spacing: -0.03em;
  font-family: "Manrope", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

.panel h2 {
  margin: 0 0 16px;
  font-size: 1.4rem;
}

.panel h3 {
  margin: 24px 0 12px;
  font-size: 1.02rem;
}

.panel h4 {
  margin: 18px 0 10px;
  font-size: 0.95rem;
}

.panel p {
  margin: 0 0 12px;
  color: var(--text-soft);
  line-height: 1.75;
}

.panel ul,
.panel ol {
  margin: 0 0 12px;
  padding-left: 20px;
  color: var(--text-soft);
}

.panel li {
  margin: 8px 0;
  line-height: 1.7;
}

.panel hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 24px 0;
}

.metric-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 2px 0 2px;
}

.metric-card {
  padding: 16px;
  border-radius: var(--radius-md);
  background: #ffffff;
  border: 1px solid var(--border);
}

.metric-card__label {
  color: var(--text-faint);
  font-size: 0.78rem;
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.metric-card__value {
  font-size: 1.2rem;
  font-weight: 650;
  letter-spacing: -0.03em;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #ffffff;
}

.data-table--pricing {
  table-layout: fixed;
  border-radius: 0;
  border-left: 0;
  border-right: 0;
}

.data-table th,
.data-table td {
  padding: 13px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid #ebe7db;
}

.data-table thead th {
  color: var(--text);
  background: #fafafa;
  font-size: 0.86rem;
  font-weight: 600;
}

.data-table--pricing thead th:nth-child(2),
.data-table--pricing tbody td:nth-child(2) {
  background: #f7f7ff;
}

.data-table--pricing thead th:nth-child(1),
.data-table--pricing tbody td:nth-child(1),
.data-table--pricing thead th:nth-child(2),
.data-table--pricing tbody td:nth-child(2),
.data-table--pricing thead th:nth-child(3),
.data-table--pricing tbody td:nth-child(3) {
  width: 33.333%;
}

.data-table--pricing td,
.data-table--pricing th {
  text-align: center;
}

.data-table--pricing td:first-child,
.data-table--pricing th:first-child {
  text-align: left;
}

.data-table--pricing td:nth-child(3),
.data-table--pricing th:nth-child(3) {
  font-size: 0.92rem;
}

.data-table tbody tr:last-child td {
  border-bottom: 0;
}

.data-table td {
  color: var(--text-soft);
}

.data-table td strong,
.data-table td code {
  color: var(--text);
}

.check {
  color: var(--success);
  font-weight: 700;
}

.capability-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  font-weight: 500;
}

.capability-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  flex: 0 0 16px;
  color: #666c7a;
  padding: 0;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
  vertical-align: middle;
}

code {
  padding: 2px 7px;
  border-radius: 6px;
  background: #f8fafc;
  border: 1px solid #e5e7eb;
  font-family: "IBM Plex Mono", Consolas, "SFMono-Regular", monospace;
  font-size: 0.92em;
}

.formula {
  padding: 16px 18px;
  border-radius: var(--radius-md);
  background: #fafafa;
  border: 1px solid var(--border);
  color: var(--text);
  font-family: "IBM Plex Mono", Consolas, "SFMono-Regular", monospace;
  overflow-x: auto;
  margin: 12px 0;
}

.note {
  padding: 14px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: #fafafa;
  color: var(--text-soft);
}

.faq-list {
  display: grid;
  gap: 10px;
}

.section-heading {
  margin: 0 0 16px;
  font-size: 1.9rem;
  letter-spacing: -0.04em;
  text-align: center;
}

.section-intro {
  max-width: 760px;
  margin: 0 auto 20px;
  color: var(--text-soft);
  text-align: center;
  line-height: 1.7;
}

.table-caption {
  color: var(--text-faint);
  font-size: 0.9rem;
  margin: 0 0 12px;
}

.faq-item {
  padding: 16px 18px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: #ffffff;
}

.faq-question {
  position: relative;
  display: block;
  margin: 0;
  padding-right: 28px;
  cursor: pointer;
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text);
  list-style: none;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 0;
  transform: translateY(-50%);
  color: var(--text-faint);
  font-size: 1.15rem;
  line-height: 1;
}

.faq-item[open] .faq-question::after {
  content: "-";
}

.faq-answer {
  padding-top: 12px;
}

.faq-answer > :last-child {
  margin-bottom: 0;
}

.empty-state {
  display: grid;
  gap: 12px;
  justify-items: start;
  padding: 22px;
  border-radius: var(--radius-md);
  background: #fafafa;
  border: 1px dashed var(--border-strong);
}

.site-footer {
  border-top: 1px solid var(--border);
  background: #ffffff;
}

.site-footer__inner {
  padding: 22px 0 28px;
  display: grid;
  gap: 12px;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-soft);
  padding: 6px 0;
}

.footer-links a:hover,
.footer-links a.is-current {
  color: var(--text);
}

.footer-meta {
  color: var(--text-faint);
  font-size: 0.88rem;
}

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

@media (max-width: 900px) {
  .site-header__inner {
    padding: 14px 0;
    align-items: flex-start;
    flex-direction: column;
  }

  .metric-strip {
    grid-template-columns: 1fr;
  }

  .panel__inner {
    padding: 22px;
  }

  .panel--flat .panel__inner {
    padding: 0;
  }

  .data-table {
    display: block;
    overflow-x: auto;
  }
}

@media (max-width: 640px) {
  .site-main {
    padding-top: 28px;
  }

  .article-meta {
    gap: 8px;
  }

  .blog-entry__footer {
    align-items: flex-start;
  }

  .blog-card {
    padding: 18px;
  }

  .update-timeline {
    --timeline-offset: 28px;
    --timeline-line-left: 8px;
  }

  .update-entry__dot {
    top: 20px;
  }

  .data-table--pricing {
    display: table;
    width: 100%;
    margin: 0 auto;
    overflow: hidden;
  }

  .data-table--pricing th:nth-child(3),
  .data-table--pricing td:nth-child(3) {
    display: none;
  }

  .data-table--pricing thead th:nth-child(1),
  .data-table--pricing tbody td:nth-child(1),
  .data-table--pricing thead th:nth-child(2),
  .data-table--pricing tbody td:nth-child(2) {
    width: 50%;
  }

  .data-table--pricing td:first-child,
  .data-table--pricing th:first-child {
    text-align: center;
  }

  .data-table--pricing .capability-label {
    justify-content: center;
  }

  .site-header__inner,
  .site-main,
  .site-footer__inner {
    width: min(calc(100% - 20px), var(--container));
  }

  .hero__title {
    font-size: 2rem;
  }

  .hero-actions {
    width: 100%;
  }

  .button {
    flex: 1 1 180px;
  }

  .site-nav {
    width: 100%;
  }

  .nav-link,
  .nav-cta {
    padding: 10px 12px;
  }
}