/* English site micro-tweaks — reuses site-shell / page CSS; no full theme fork */

html[lang="en"] body.ll-shell {
  font-family: "Segoe UI", "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
}

/* Language switcher (shared visual; used on both ZH and EN pages) */
.ll-lang {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.25rem;
  height: 2rem;
  padding: 0 0.55rem;
  margin-left: 0.15rem;
  border: 1px solid rgba(15, 16, 18, 0.1);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  font-size: 0.78rem;
  font-weight: 560;
  letter-spacing: 0.04em;
  color: var(--ll-ink, #0f1012);
  transition: background 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}
.ll-lang:hover {
  background: rgba(255, 255, 255, 0.95);
}
.ll-lang:focus-visible {
  outline: 2px solid var(--ll-blue, #0071e3);
  outline-offset: 2px;
}
.ll-header--dark .ll-lang,
.ll-header--blue .ll-lang {
  background: rgba(15, 16, 18, 0.28);
  border-color: rgba(255, 255, 255, 0.18);
  color: #fff;
}
.ll-mnav__lang {
  display: inline-flex;
  margin-top: 0.35rem;
  padding: 0.35rem 0;
  font-weight: 560;
  color: var(--ll-blue, #0071e3);
}

/* EN home — editorial product strip on shell background */
.en-home-hero {
  padding: clamp(6rem, 12vw, 8rem) var(--ll-gutter, 1.5rem) clamp(2.5rem, 5vw, 3.5rem);
  background: var(--ll-bg, #f2f2f4);
}
.en-home-hero__inner {
  width: min(var(--ll-max, 1360px), 100%);
  margin: 0 auto;
}
.en-home-hero__eyebrow {
  margin: 0 0 0.85rem;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: rgba(15, 16, 18, 0.42);
}
.en-home-hero h1 {
  margin: 0;
  max-width: 16em;
  font-size: clamp(1.9rem, 3.8vw, 2.75rem);
  font-weight: 460;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--ll-ink, #0f1012);
}
.en-home-hero__lead {
  margin: 1rem 0 0;
  max-width: 42ch;
  font-size: clamp(1rem, 1.25vw, 1.1rem);
  line-height: 1.65;
  color: var(--ll-muted, #5e5e5e);
}
.en-home-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}
.en-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 1.25rem;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 540;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.en-btn--primary {
  background: var(--ll-blue, #0071e3);
  color: #fff;
  border: 0;
}
.en-btn--primary:hover {
  background: #0060c0;
}
.en-btn--ghost {
  background: transparent;
  color: var(--ll-ink, #0f1012);
  border: 1px solid rgba(15, 16, 18, 0.16);
}
.en-btn--ghost:hover {
  border-color: rgba(15, 16, 18, 0.35);
}
.en-btn--light {
  background: #fff;
  color: var(--ll-ink, #0f1012);
  border: 0;
}
.en-btn--ghost-light {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.45);
}

.en-home-intro,
.en-home-products,
.en-home-boundary,
.en-home-cta {
  padding: 0 var(--ll-gutter, 1.5rem);
}
.en-home-intro__inner,
.en-home-products__inner,
.en-home-boundary__inner,
.en-home-cta__inner {
  width: min(var(--ll-max, 1360px), 100%);
  margin: 0 auto;
}
.en-home-intro {
  padding-bottom: clamp(2.5rem, 5vw, 3.5rem);
}
.en-home-intro__grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  padding-top: 0.5rem;
  border-top: 1px solid var(--ll-line, rgba(15, 16, 18, 0.1));
}
.en-home-intro h2 {
  margin: 0;
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  font-weight: 520;
  letter-spacing: -0.02em;
}
.en-home-intro p {
  margin: 0 0 0.85rem;
  font-size: 1rem;
  line-height: 1.65;
  color: var(--ll-muted, #5e5e5e);
}
.en-home-intro p:last-child {
  margin-bottom: 0;
}

.en-home-products {
  padding-top: clamp(1rem, 3vw, 2rem);
  padding-bottom: clamp(3rem, 6vw, 4.5rem);
}
.en-home-products__label {
  margin: 0 0 0.5rem;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: rgba(15, 16, 18, 0.4);
}
.en-home-products h2 {
  margin: 0 0 0.65rem;
  font-size: clamp(1.4rem, 2.4vw, 1.85rem);
  font-weight: 500;
  letter-spacing: -0.02em;
}
.en-home-products__lead {
  margin: 0 0 1.75rem;
  max-width: 48ch;
  color: var(--ll-muted, #5e5e5e);
  line-height: 1.6;
}
.en-plist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.25rem;
}
.en-plist__item a {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: 1.25rem;
  align-items: center;
  padding: 1.1rem 0;
  border-top: 1px solid var(--ll-line, rgba(15, 16, 18, 0.1));
}
.en-plist__item:last-child a {
  border-bottom: 1px solid var(--ll-line, rgba(15, 16, 18, 0.1));
}
.en-plist__num {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  color: var(--ll-blue, #0071e3);
}
.en-plist__name {
  margin: 0 0 0.4rem;
  font-size: 1.15rem;
  font-weight: 540;
  letter-spacing: -0.015em;
}
.en-plist__desc {
  margin: 0 0 0.55rem;
  color: var(--ll-muted, #5e5e5e);
  line-height: 1.55;
  font-size: 0.95rem;
}
.en-plist__go {
  font-size: 0.9rem;
  color: var(--ll-blue, #0071e3);
}
.en-plist__media {
  margin: 0;
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--ll-line, rgba(15, 16, 18, 0.1));
}
.en-plist__media img {
  width: 100%;
  height: auto;
  display: block;
}

.en-home-boundary {
  padding: clamp(2.5rem, 5vw, 3.5rem) var(--ll-gutter, 1.5rem);
  background: #0f1012;
  color: #fff;
}
.en-home-boundary h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.25rem, 2vw, 1.55rem);
  font-weight: 500;
}
.en-home-boundary p {
  margin: 0;
  max-width: 52ch;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.72);
}

.en-home-cta {
  padding: clamp(3rem, 6vw, 4.5rem) var(--ll-gutter, 1.5rem);
  background: var(--ll-blue, #0071e3);
  color: #fff;
}
.en-home-cta h2 {
  margin: 0 0 0.55rem;
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  font-weight: 500;
}
.en-home-cta p {
  margin: 0 0 1.25rem;
  color: rgba(255, 255, 255, 0.88);
  max-width: 40ch;
  line-height: 1.55;
}
.en-home-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* Learning hub article cards */
.en-learn-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}
.en-learn-card {
  padding: 0;
  border: 1px solid var(--ll-line, rgba(15, 16, 18, 0.1));
  border-radius: 8px;
  background: #fff;
}
.en-learn-card__link {
  display: block;
  padding: 1.15rem 1.2rem;
  color: inherit;
  text-decoration: none;
  border-radius: 8px;
  transition: background 0.15s ease, border-color 0.15s ease;
}
.en-learn-card__link:hover,
.en-learn-card__link:focus-visible {
  background: rgba(15, 98, 254, 0.04);
  outline: none;
}
.en-learn-card__status {
  display: inline-block;
  margin-bottom: 0.45rem;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(15, 16, 18, 0.45);
}
.en-learn-card h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
  font-weight: 540;
  color: var(--ll-ink, #0f1012);
}
.en-learn-card p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--ll-muted, #5e5e5e);
}

@media (max-width: 900px) {
  .en-home-intro__grid,
  .en-plist__item a {
    grid-template-columns: 1fr;
  }
  .en-home-hero h1 {
    max-width: none;
  }
}

@media (max-width: 640px) {
  .ll-lang {
    margin-left: auto;
  }
  .ll-header__mobile-cta + .ll-lang {
    margin-left: 0.35rem;
  }
}