/* Meta AI assistant page — measured recreation (2026-11-06f)
 * Content: ma-wd ~1400px feel (wider per site feedback; Meta base 1270 + side pad)
 * Side pad: 24 / 32 / 64
 * Section pad: 48 / 80
 * Bento: left feature + 2x2 grey tiles, gap 16, radius 24 / 16
 * CTA: full-bleed rounded banner, h3 title, chip
 * FAQ: blue label, dense accordion, answer 688
 */
.meta-home {
  --meta-bg: #ffffff;
  --meta-ink: #1C2B33;
  --meta-muted: #5D6C7B;
  --meta-faint: #8595A4;
  --meta-line: #DEE3E9;
  --meta-soft: #F1F4F7;
  --meta-card: #F1F4F7;
  --meta-blue: #0064E0;
  --meta-label: #0457CB;
  --meta-radius: 0.5rem;
  --meta-radius-md: 1rem;
  --meta-radius-lg: 1.5rem;
  --meta-max: 1400px;
  background: var(--meta-bg);
  color: var(--meta-ink);
  font-family: "Optimistic Display", "Optimistic Text", "Optimistic VF", Inter, Montserrat, Helvetica, Arial, "PingFang SC", "Noto Sans SC", sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-size: 15px;
  line-height: 1.5;
}
html.dark .meta-home,
.dark .meta-home {
  --meta-bg: #0a0a0a;
  --meta-ink: #f5f5f7;
  --meta-muted: rgba(245, 245, 247, 0.62);
  --meta-faint: rgba(245, 245, 247, 0.40);
  --meta-line: rgba(255, 255, 255, 0.12);
  --meta-soft: #141414;
  --meta-card: #161616;
  --meta-blue: #4BA9FE;
  --meta-label: #4BA9FE;
}
.meta-home *,
.meta-home *::before,
.meta-home *::after { box-sizing: border-box; }
.meta-home a { text-decoration: none; color: inherit; }

.meta-wrap {
  width: 100%;
  max-width: var(--meta-max);
  margin: 0 auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}
@media (min-width: 768px) {
  .meta-wrap { padding-left: 2rem; padding-right: 2rem; }
}
@media (min-width: 1025px) {
  .meta-wrap { padding-left: 4rem; padding-right: 4rem; }
}

.meta-section {
  padding-top: 3rem;
  padding-bottom: 3rem;
}
@media (min-width: 768px) {
  .meta-section { padding-top: 5rem; padding-bottom: 5rem; }
}

.meta-h2 {
  margin: 0;
  font-size: 2rem;
  line-height: 1.125;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--meta-ink);
}
@media (min-width: 768px) {
  .meta-h2 { font-size: 2.5rem; line-height: 1.2; }
}
@media (min-width: 1025px) {
  .meta-h2 { font-size: 3rem; line-height: 1.1667; }
}
.meta-lead {
  margin: 0.75rem 0 0;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--meta-muted);
  font-weight: 400;
  max-width: 42rem;
}
.meta-kicker {
  display: inline-block;
  font-size: 0.875rem;
  line-height: 1.4286;
  font-weight: 400;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  color: var(--meta-label);
  margin-bottom: 1.5rem;
}

.meta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 2.75rem;
  padding: 0.625rem 1.125rem;
  border-radius: 9999px;
  font-size: 0.9375rem;
  line-height: 1.25rem;
  font-weight: 500;
  border: 0;
  cursor: pointer;
  transition: filter .15s ease, opacity .15s ease;
}
.meta-btn-primary { background: var(--meta-blue); color: #fff !important; }
.meta-btn-primary:hover { filter: brightness(1.06); }
.meta-btn-on-dark { background: #0064E0; color: #fff !important; }
.meta-text-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--meta-blue);
}
.meta-text-link:hover { opacity: .75; }
.meta-all-link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.875rem;
  line-height: 1.25rem;
  font-weight: 500;
  color: var(--meta-ink);
  white-space: nowrap;
}
.meta-all-link:hover { opacity: .7; }
.meta-all-link svg { width: 0.875rem; height: 0.875rem; }

/* Stats — x.ai */
.meta-stats { padding-top: 1rem; padding-bottom: 1.5rem; }
@media (min-width: 640px) {
  .meta-stats { padding-top: 1.5rem; padding-bottom: 1.5rem; }
}
.meta-stats-inner {
  border-top: 1px solid var(--meta-line);
  border-bottom: 1px solid var(--meta-line);
  padding-top: 2rem;
  padding-bottom: 2rem;
}
@media (min-width: 640px) {
  .meta-stats-inner { padding-top: 2.5rem; padding-bottom: 2.5rem; }
}
.meta-stats-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  text-align: left;
}
@media (min-width: 640px) {
  .meta-stats-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 2.5rem;
  }
  .meta-stat:not(:first-child) {
    border-left: 1px solid var(--meta-line);
    padding-left: 2.5rem;
  }
}
.meta-stat b {
  display: block;
  font-size: 2.25rem;
  line-height: 2.5rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--meta-ink);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}
@media (min-width: 640px) {
  .meta-stat b { font-size: 3rem; line-height: 1; }
}
.meta-stat > span {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.875rem;
  line-height: 1.25rem;
  font-weight: 500;
  color: var(--meta-muted);
}
.meta-stats-note { display: none; }

/* Latest news — x.ai */
.meta-news-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2rem;
}
.meta-news-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}
@media (min-width: 640px) {
  .meta-news-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1024px) {
  .meta-news-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1.5rem; }
}
.meta-news-card {
  display: block;
  border-radius: 0.5rem;
  overflow: hidden;
  border: 1px solid rgba(28, 43, 51, 0.08);
  background: var(--meta-bg);
  transition: border-color .3s ease;
}
html.dark .meta-news-card,
.dark .meta-news-card { border-color: rgba(255,255,255,0.08); }
.meta-news-card:hover { border-color: rgba(28, 43, 51, 0.22); }
html.dark .meta-news-card:hover,
.dark .meta-news-card:hover { border-color: rgba(255,255,255,0.22); }
.meta-news-cover {
  position: relative;
  width: 100%;
  aspect-ratio: 1200 / 630;
  overflow: hidden;
  background: var(--meta-soft);
}
.meta-news-cover img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover; display: block;
  transition: transform .7s cubic-bezier(0.22, 1, 0.36, 1);
}
.meta-news-card:hover .meta-news-cover img { transform: scale(1.03); }
.meta-news-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  pointer-events: none;
  text-align: center;
  color: #fff;
}
.meta-news-overlay-en {
  font-size: clamp(18px, 1.7vw, 22px);
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.15;
  white-space: nowrap;
}
.meta-news-overlay-zh {
  font-size: clamp(14px, 1.2vw, 16px);
  font-weight: 500;
  letter-spacing: 0.28em;
  line-height: 1.2;
}
.meta-news-body { padding: 0 0.75rem 1rem; }
.meta-news-meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem;
  margin-top: 1rem;
  font-size: 0.75rem; line-height: 1rem; font-weight: 400;
  color: var(--meta-ink);
}
.meta-news-meta time, .meta-news-meta .dot { color: var(--meta-muted); }
.meta-news-body h3 {
  margin: 0.5rem 0 0;
  font-size: 1rem; line-height: 1.375; font-weight: 500;
  letter-spacing: -0.01em; color: var(--meta-ink);
}
.meta-news-body h3 .meta-card-chev {
  display: inline-block; margin-left: 0.25rem; vertical-align: -0.1em;
  width: 0.875rem; height: 0.875rem; color: var(--meta-muted);
}
.meta-card-arrow { display: none; }

/* ===== Bento — Meta "lives / works where you do" ===== */
.meta-bento-intro {
  margin-bottom: 2rem;
  max-width: 46rem;
}
@media (min-width: 768px) {
  .meta-bento-intro { margin-bottom: 2.5rem; }
}
.meta-bento-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
@media (min-width: 960px) {
  .meta-bento-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 1rem;
    align-items: stretch;
  }
}
.meta-bento-feature {
  background: #E8F3FF;
  border-radius: var(--meta-radius-lg);
  padding: 1.5rem 1.5rem 1.75rem;
  display: flex;
  flex-direction: column;
  min-height: 100%;
  overflow: hidden;
}
@media (min-width: 960px) {
  .meta-bento-feature { padding: 2rem 2rem 2.25rem; }
}
html.dark .meta-bento-feature,
.dark .meta-bento-feature {
  background: linear-gradient(165deg, #152238 0%, #0d1524 55%, #0a0a0a 100%);
}
.meta-bento-feature-visual {
  position: relative;
  margin: 0 auto 1.75rem;
  width: 100%;
  max-width: none;
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 14rem;
}
@media (min-width: 960px) {
  .meta-bento-feature-visual { min-height: 22rem; margin-bottom: 2rem; }
}
.meta-bento-window {
  position: relative;
  width: 100%;
  max-width: 34rem;
  border-radius: 1rem;
  overflow: visible;
}
.meta-bento-window-frame {
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: 0 18px 48px rgba(15, 40, 100, 0.18);
  background: #fff;
  border: 1px solid rgba(255,255,255,0.75);
}
html.dark .meta-bento-window-frame,
.dark .meta-bento-window-frame {
  background: #111;
  border-color: rgba(255,255,255,0.08);
  box-shadow: 0 18px 48px rgba(0,0,0,0.45);
}
.meta-bento-window-bar {
  display: flex; align-items: center; gap: 0.375rem;
  padding: 0.625rem 0.75rem;
  background: rgba(0,0,0,0.04);
  font-size: 0.6875rem; color: var(--meta-muted);
}
.meta-bento-window-bar i {
  width: 0.5rem; height: 0.5rem; border-radius: 50%;
  background: #d0d0d0; display: inline-block;
}
.meta-bento-window-bar i:nth-child(1) { background: #ff5f57; }
.meta-bento-window-bar i:nth-child(2) { background: #febc2e; }
.meta-bento-window-bar i:nth-child(3) { background: #28c840; }
.meta-bento-window-bar span { margin-left: 0.5rem; }
.meta-bento-window-frame img {
  display: block; width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}
.meta-bento-chat {
  position: absolute;
  right: -0.5rem;
  bottom: -0.75rem;
  width: min(78%, 17.5rem);
  background: #fff;
  border-radius: 1rem;
  box-shadow: 0 14px 40px rgba(15, 40, 100, 0.22);
  border: 1px solid rgba(28,43,51,0.06);
  padding: 0.875rem 1rem;
  z-index: 2;
}
html.dark .meta-bento-chat,
.dark .meta-bento-chat {
  background: #1a1a1a;
  border-color: rgba(255,255,255,0.08);
}
.meta-bento-chat-label {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 0.75rem; font-weight: 600; color: var(--meta-ink);
  margin-bottom: 0.5rem;
}
.meta-bento-chat-dot {
  width: 1.25rem; height: 1.25rem; border-radius: 999px;
  background: linear-gradient(135deg, #47A5FA, #0064E0);
  flex-shrink: 0;
}
.meta-bento-chat p {
  margin: 0;
  font-size: 0.8125rem;
  line-height: 1.45;
  color: var(--meta-muted);
}
.meta-bento-feature-copy h2 {
  margin: 0;
  font-size: 1.5rem;
  line-height: 1.25;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--meta-ink);
  max-width: 28rem;
}
@media (min-width: 768px) {
  .meta-bento-feature-copy h2 { font-size: 1.75rem; line-height: 1.2143; }
}
@media (min-width: 1025px) {
  .meta-bento-feature-copy h2 { font-size: 2rem; line-height: 1.1875; }
}
.meta-bento-feature-copy p {
  margin: 0.75rem 0 0;
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--meta-muted);
  max-width: 38rem;
  font-weight: 400;
}
.meta-bento-actions {
  margin-top: 1.25rem;
  display: flex; flex-wrap: wrap; align-items: center; gap: 1rem;
}

.meta-bento-side {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  height: 100%;
}
.meta-bento-tile {
  background: var(--meta-card);
  border-radius: var(--meta-radius-md);
  padding: 1.25rem 1.25rem 1.375rem;
  border: 0;
  box-shadow: none;
  transition: transform .15s ease, background-color .15s ease;
  display: flex;
  flex-direction: column;
  min-height: 11.5rem;
  aspect-ratio: auto;
}
@media (min-width: 960px) {
  .meta-bento-tile {
    min-height: 0;
    height: 100%;
  }
}
html.dark .meta-bento-tile,
.dark .meta-bento-tile { background: var(--meta-card); }
.meta-bento-tile:hover {
  transform: translateY(-2px);
  background: #e6ebef;
}
html.dark .meta-bento-tile:hover,
.dark .meta-bento-tile:hover { background: #1c1c1c; }
.meta-tile-icon {
  display: inline-flex;
  color: var(--tile, var(--meta-blue));
  margin-bottom: 1rem;
}
.meta-tile-icon svg { width: 2rem; height: 2rem; }
.meta-bento-tile h3 {
  margin: 0;
  font-size: 1.25rem;
  line-height: 1.35;
  font-weight: 500;
  letter-spacing: -0.015em;
  color: var(--meta-ink);
}
@media (min-width: 768px) {
  .meta-bento-tile h3 { font-size: 1.5rem; line-height: 1.25; }
}
.meta-bento-tile p {
  margin: 0.5rem 0 0;
  font-size: 0.875rem;
  line-height: 1.45;
  color: var(--meta-muted);
  flex: 1;
}
@media (max-width: 560px) {
  .meta-bento-side { grid-template-columns: 1fr; }
  .meta-bento-chat { position: relative; right: auto; bottom: auto; width: 100%; margin-top: 0.75rem; }
  .meta-bento-window { overflow: visible; }
}

/* ===== Wide CTA ===== */
.meta-cta-banner {
  position: relative;
  border-radius: var(--meta-radius-lg);
  min-height: 22rem;
  aspect-ratio: 21 / 9;
  max-height: 32rem;
  background-size: cover;
  background-position: center 30%;
  background-color: #1a1a1a;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  padding: 3.5rem 1.5rem 2.5rem;
}
@media (max-width: 767px) {
  .meta-cta-banner {
    aspect-ratio: 4 / 5;
    max-height: none;
    min-height: 26rem;
  }
}
@media (min-width: 768px) {
  .meta-cta-banner {
    align-items: center;
    padding: 3.5rem 2rem 3.5rem;
    min-height: 26rem;
  }
}
@media (min-width: 1025px) {
  .meta-cta-banner { padding: 3.5rem 4rem 3.5rem; }
}
.meta-cta-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(8,12,28,0.72) 0%, rgba(8,12,28,0.35) 48%, rgba(8,12,28,0.08) 100%);
}
@media (max-width: 767px) {
  .meta-cta-overlay {
    background: linear-gradient(180deg, rgba(8,12,28,0.15) 0%, rgba(8,12,28,0.72) 70%);
  }
}
.meta-cta-copy {
  position: relative; z-index: 1;
  max-width: 40rem;
  color: #fff;
}
.meta-cta-copy h2 {
  margin: 0;
  font-size: 1.75rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.2143;
  color: #fff;
}
@media (min-width: 768px) {
  .meta-cta-copy h2 { font-size: 2rem; line-height: 1.1875; }
}
@media (min-width: 1025px) {
  .meta-cta-copy h2 { font-size: 2.25rem; line-height: 1.2778; }
}
.meta-cta-copy p {
  margin: 0.875rem 0 0;
  font-size: 0.9375rem;
  line-height: 1.5;
  color: rgba(255,255,255,0.84);
  font-weight: 400;
  max-width: 32rem;
}
.meta-cta-copy .meta-btn { margin-top: 1.25rem; }
.meta-cta-chip {
  position: absolute;
  z-index: 1;
  right: 1.5rem;
  bottom: 1.5rem;
  display: none;
  align-items: center;
  gap: 0.625rem;
  max-width: 18rem;
  padding: 0.75rem 1rem 0.75rem 0.75rem;
  border-radius: 9999px;
  background: rgba(255,255,255,0.96);
  color: #1C2B33;
  font-size: 0.8125rem;
  font-weight: 600;
  line-height: 1.35;
  box-shadow: 0 8px 30px rgba(0,0,0,0.18);
}
.meta-cta-chip-icon {
  width: 2rem; height: 2rem; border-radius: 999px;
  background: linear-gradient(135deg, #f58529, #dd2a7b 50%, #515bd4);
  color: #fff;
  display: inline-flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  font-size: 0.9rem;
}
@media (min-width: 900px) {
  .meta-cta-chip { display: inline-flex; }
}

/* ===== FAQ ===== */
.meta-faq {
  padding-top: 5rem;
  padding-bottom: 3.5rem;
  border-bottom: 1px solid var(--meta-line);
}
@media (min-width: 768px) {
  .meta-faq { padding-top: 5rem; padding-bottom: 5rem; }
}
.meta-faq-wrap { max-width: var(--meta-max); }
.meta-faq-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: none; border: 0; padding: 0;
  margin: 0 0 1.5rem;
  font-size: 0.875rem;
  line-height: 1.4286;
  font-weight: 400;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  color: var(--meta-label);
  cursor: pointer;
  font-family: inherit;
}
.meta-faq-list { border-top: 1px solid var(--meta-line); }
.meta-faq-item { border-bottom: 1px solid var(--meta-line); }
.meta-faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  padding: 1.5rem 0;
  background: none; border: 0;
  text-align: left; cursor: pointer;
  font-family: inherit;
  color: var(--meta-ink);
}
.meta-faq-q span:first-child {
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.35;
}
@media (min-width: 768px) {
  .meta-faq-q span:first-child {
    font-size: 1.75rem;
    line-height: 1.2143;
  }
}
.meta-faq-plus {
  flex-shrink: 0;
  width: 1.5rem; height: 1.5rem;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 1.75rem; line-height: 1; font-weight: 300;
  color: var(--meta-ink);
  transition: transform .2s ease;
}
.meta-faq-q[aria-expanded="true"] .meta-faq-plus { transform: rotate(45deg); }
.meta-faq-a {
  padding: 0 0 1.5rem;
  max-width: 688px;
}
.meta-faq-a p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--meta-muted);
}
.meta-faq-a[hidden] { display: none; }

/* Contact + footer */
.meta-contact-head { margin-bottom: 1.75rem; max-width: 40rem; }
.meta-contact-grid {
  display: grid; grid-template-columns: 1fr; gap: 1rem;
}
@media (min-width: 800px) {
  .meta-contact-grid { grid-template-columns: 1.2fr 0.8fr; }
}
.meta-contact-card {
  background: var(--meta-card);
  border-radius: var(--meta-radius-lg);
  padding: 1.75rem 1.5rem;
  border: 0;
}
.meta-contact-card.soft { background: var(--meta-soft); }
.meta-contact-card h3 {
  margin: 0; font-size: 1.25rem; font-weight: 500; letter-spacing: -0.01em;
}
.meta-contact-card p {
  margin: 0.625rem 0 0; font-size: 0.875rem; line-height: 1.5; color: var(--meta-muted);
}
.meta-contact-card ul {
  margin: 1rem 0 1.25rem; padding-left: 1.125rem;
  color: var(--meta-muted); font-size: 0.875rem; line-height: 1.6;
}
.meta-contact-wechat { margin-top: 0.75rem !important; font-size: 0.8125rem !important; }
.meta-resource-links { margin-top: 1rem; display: grid; gap: 0.625rem; }
.meta-resource-links a {
  display: flex; justify-content: space-between; align-items: center;
  padding: 0.75rem 0.875rem; border-radius: 0.75rem;
  background: var(--meta-bg); font-size: 0.875rem; font-weight: 500;
}
.meta-resource-links a:hover { opacity: .85; }

.meta-footer {
  border-top: 1px solid var(--meta-line);
  padding: 1.75rem 0 2.5rem;
}
.meta-footer-inner {
  display: flex; flex-wrap: wrap; align-items: center;
  gap: 1rem 1.75rem; justify-content: space-between;
}
.meta-footer-brand a { font-weight: 600; font-size: 0.875rem; }
.meta-footer-brand p {
  margin: 0.375rem 0 0; font-size: 0.75rem; color: var(--meta-faint);
}
.meta-footer-nav {
  display: flex; flex-wrap: wrap; gap: 0.875rem 1.125rem;
  font-size: 0.875rem; font-weight: 500; color: var(--meta-muted);
}
.meta-footer-nav a:hover { color: var(--meta-ink); }
.meta-footer-theme {
  border: 1px solid var(--meta-line); background: transparent;
  width: 2.25rem; height: 2.25rem; border-radius: 9999px;
  cursor: pointer; font-size: 1rem; color: var(--meta-ink);
}

/* Isolation */
.meta-home.studio-home {
  background: #fff !important;
  color: #1C2B33 !important;
}
html.dark .meta-home.studio-home,
.dark .meta-home.studio-home {
  background: #0a0a0a !important;
  color: #f5f5f7 !important;
}
.meta-home .studio-container { max-width: none; padding: 0; }