/* Additive bilingual and Ling AI ecosystem styles.
   Existing site selectors and original section styles remain untouched. */

.brand-mark {
  overflow: hidden;
  flex: 0 0 40px;
  width: 40px !important;
  height: 40px !important;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 11px !important;
  background: #fff url("/zhiling-logo.jpg") center / 125% auto no-repeat !important;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.28), 0 0 22px rgba(102, 214, 184, 0.12);
}

.brand-mark > i {
  display: none !important;
}

.hero-media video {
  object-position: center center;
  pointer-events: none;
}

@media (max-width: 768px), (pointer: coarse) {
  .hero-media {
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
  }

  .hero-media video {
    display: block !important;
    width: 100% !important;
    height: 100% !important;
    visibility: visible !important;
    opacity: 1 !important;
    object-fit: cover !important;
    object-position: center center !important;
    -webkit-transform: translateZ(0);
    transform: translateZ(0);
  }
}

.header-actions-addon {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 10px;
}

.language-switcher-addon {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.045);
}

.language-switcher-addon button {
  min-width: 31px;
  height: 30px;
  padding: 0 8px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: #858792;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.language-switcher-addon button[aria-pressed="true"] {
  background: #fff;
  color: #08080a;
  box-shadow: 0 5px 16px rgba(0, 0, 0, 0.2);
}

.language-switcher-addon button:hover,
.language-switcher-addon button:focus-visible {
  color: #fff;
}

.language-switcher-addon button[aria-pressed="true"]:hover,
.language-switcher-addon button[aria-pressed="true"]:focus-visible {
  color: #08080a;
}

.main-nav [data-addon-nav] {
  padding-inline: 8px;
  font-size: 11px;
}

.ling-addon-section {
  overflow: hidden;
  padding-block: 112px;
}

.ling-addon-section .section-heading {
  position: relative;
  z-index: 3;
}

.ling-addon-section .section-heading h2 {
  max-width: 1120px;
  font-size: clamp(36px, 4.7vw, 70px);
  line-height: 1.08;
  overflow-wrap: anywhere;
  text-wrap: balance;
}

.ling-addon-section .section-heading p {
  max-width: 960px;
}

.ling-ecosystem-addon {
  background:
    radial-gradient(circle at 83% 22%, rgba(123, 92, 255, 0.17), transparent 28%),
    linear-gradient(#000, #030207 54%, #000);
}

.ling-addon-glow {
  position: absolute;
  right: -230px;
  top: 160px;
  width: 520px;
  height: 520px;
  border: 1px solid rgba(160, 107, 255, 0.18);
  border-radius: 50%;
  box-shadow:
    0 0 130px rgba(123, 92, 255, 0.11) inset,
    0 0 120px rgba(123, 92, 255, 0.06);
}

.ling-format-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.ling-format-card,
.ling-feature-card,
.ling-value-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.012)),
    rgba(255, 255, 255, 0.018);
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.035);
  transition: transform 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}

.ling-format-card:hover,
.ling-feature-card:hover,
.ling-value-card:hover {
  transform: translateY(-5px);
  border-color: rgba(160, 107, 255, 0.42);
  background:
    linear-gradient(145deg, rgba(123, 92, 255, 0.12), rgba(255, 255, 255, 0.014)),
    rgba(255, 255, 255, 0.018);
}

.ling-format-card {
  min-height: 272px;
  padding: 27px;
  border-radius: 22px;
}

.ling-format-card::after {
  position: absolute;
  right: -78px;
  bottom: -92px;
  width: 180px;
  height: 180px;
  border: 1px solid rgba(160, 107, 255, 0.18);
  border-radius: 50%;
  content: "";
}

.ling-card-code {
  color: #6f7180;
  font-size: 8px;
  letter-spacing: 0.18em;
}

.ling-format-symbol {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  margin: 40px 0 24px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 50%;
  color: #ad9eff;
  font-size: 21px;
}

.ling-format-card h3,
.ling-feature-card h3,
.ling-value-card h3 {
  margin: 0;
  letter-spacing: -0.025em;
  font-weight: 520;
}

.ling-format-card h3 {
  font-size: 21px;
}

.ling-format-card p,
.ling-feature-card p,
.ling-value-card p {
  color: #92949f;
  line-height: 1.75;
}

.ling-format-card p {
  margin: 14px 0 0;
  font-size: 12px;
}

.ling-loop-addon {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 32px;
  align-items: center;
  margin-top: 56px;
  padding: 31px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.ling-loop-title {
  color: #9a8ee4;
  font-size: 9px;
  letter-spacing: 0.2em;
}

.ling-loop-addon ol {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  margin: 0;
  padding: 0;
  list-style: none;
}

.ling-loop-addon li {
  position: relative;
  display: grid;
  gap: 8px;
  min-height: 53px;
  padding: 0 22px;
  border-left: 1px solid var(--line-soft);
}

.ling-loop-addon li:not(:last-child)::after {
  position: absolute;
  top: 16px;
  right: 7px;
  color: #7b5cff;
  content: "→";
}

.ling-loop-addon li small {
  color: #5f616b;
  font-size: 8px;
}

.ling-loop-addon li b {
  font-size: 12px;
  font-weight: 520;
}

.ling-contrast-addon {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) 40px minmax(0, 1.2fr);
  gap: 18px;
  align-items: center;
  margin-top: 48px;
}

.ling-contrast-card {
  min-height: 140px;
  padding: 25px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.025);
}

.ling-contrast-card.is-focus {
  border-color: rgba(160, 107, 255, 0.44);
  background: linear-gradient(120deg, rgba(123, 92, 255, 0.14), rgba(127, 208, 196, 0.035));
}

.ling-contrast-card small {
  color: #767986;
  font-size: 8px;
  letter-spacing: 0.16em;
}

.ling-contrast-card p {
  margin: 35px 0 0;
  color: #d7d8de;
  font-size: 17px;
  line-height: 1.55;
}

.ling-contrast-arrow {
  color: #8977ed;
  text-align: center;
}

.ling-slogan-addon {
  margin: 56px 0 0;
  padding: 28px 30px;
  border-left: 2px solid #7b5cff;
  background: linear-gradient(90deg, rgba(123, 92, 255, 0.1), transparent);
  color: #c6c7ce;
  font-size: 16px;
  line-height: 1.9;
}

.semi-section .semi-browser {
  display: block;
  aspect-ratio: 2 / 1;
  min-height: 0;
  border-color: rgba(255, 255, 255, 0.18);
  background: #fff url("/semi-project-workspace.png") center top / cover no-repeat;
  transform: perspective(1200px) rotateY(-2deg) rotateX(1deg);
}

.semi-section .semi-browser > * {
  display: none !important;
}

.ling-media-showcase {
  margin-top: 72px;
  padding-top: 34px;
  border-top: 1px solid var(--line);
}

.ling-media-heading {
  margin-bottom: 20px;
  color: #9f91f3;
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.ling-media-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.ling-media-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.035), rgba(123, 92, 255, 0.035));
}

.ling-media-frame {
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border-bottom: 1px solid var(--line-soft);
  background: #08070c;
}

.ling-media-frame video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ling-media-card h3 {
  margin: 0;
  padding: 22px 24px 24px;
  font-size: 20px;
  font-weight: 520;
  letter-spacing: -0.03em;
}

.ling-live-addon {
  background:
    radial-gradient(circle at 18% 50%, rgba(127, 208, 196, 0.08), transparent 27%),
    #000;
}

.ling-feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.ling-feature-card {
  min-height: 286px;
  padding: 29px;
  border-radius: 24px;
}

.ling-feature-number {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 25px;
  border: 1px solid rgba(160, 107, 255, 0.38);
  border-radius: 999px;
  color: #b7a9ff;
  font-size: 9px;
}

.ling-feature-icon {
  display: grid;
  place-items: center;
  width: 50px;
  height: 50px;
  margin-top: 38px;
  border-radius: 14px;
  background: rgba(123, 92, 255, 0.1);
  color: #a99aff;
  font-size: 18px;
}

.ling-feature-card h3 {
  margin-top: 24px;
  font-size: 20px;
}

.ling-feature-card p {
  margin: 17px 0 0;
  font-size: 13px;
}

.ling-game-addon {
  background:
    radial-gradient(circle at 78% 60%, rgba(123, 92, 255, 0.13), transparent 30%),
    linear-gradient(#000, #05040a, #000);
}

.ling-value-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.ling-value-card {
  min-height: 286px;
  padding: 30px;
  border-radius: 24px;
}

.ling-value-card > small {
  color: #806ee3;
  font-size: 9px;
  letter-spacing: 0.15em;
}

.ling-value-card h3 {
  margin-top: 44px;
  font-size: 27px;
}

.ling-value-card p {
  max-width: 500px;
  margin: 18px 0 0;
  font-size: 13px;
}

.ling-payment-path {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 28px;
}

.ling-payment-path span {
  padding: 6px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: #777986;
  font-size: 7px;
  letter-spacing: 0.12em;
}

html[data-site-lang="en"] .section-heading h2 {
  letter-spacing: -0.045em;
}

html[data-site-lang="en"] .ling-format-card p,
html[data-site-lang="en"] .ling-feature-card p,
html[data-site-lang="en"] .ling-value-card p {
  line-height: 1.62;
}

@media (max-width: 1080px) {
  .site-header {
    grid-template-columns: 1fr auto auto;
  }

  .header-actions-addon .header-cta {
    display: none;
  }

  .language-switcher-addon {
    margin-right: 2px;
  }

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

  .main-nav [data-addon-nav] {
    padding: 13px 12px;
    font-size: 12px;
  }
}

@media (max-width: 820px) {
  .language-switcher-addon button {
    min-width: 28px;
    height: 27px;
    padding: 0 6px;
  }

  .ling-loop-addon {
    grid-template-columns: 1fr;
  }

  .ling-loop-addon ol {
    grid-template-columns: 1fr;
  }

  .ling-loop-addon li {
    grid-template-columns: 34px 1fr;
    align-items: center;
    min-height: auto;
    padding: 14px 14px;
    border-bottom: 1px solid var(--line-soft);
  }

  .ling-loop-addon li:not(:last-child)::after {
    right: 14px;
  }

  .ling-contrast-addon,
  .ling-media-grid,
  .ling-feature-grid,
  .ling-value-grid {
    grid-template-columns: 1fr;
  }

  .semi-section .semi-browser {
    aspect-ratio: 2 / 1;
    min-height: 0;
    transform: none;
  }

  .ling-contrast-arrow {
    transform: rotate(90deg);
  }
}

@media (max-width: 580px) {
  .site-header .brand-mark {
    flex-basis: 34px;
    width: 34px !important;
    height: 34px !important;
    border-radius: 9px !important;
  }

  .header-actions-addon {
    gap: 6px;
  }

  .language-switcher-addon {
    padding: 3px;
  }

  .language-switcher-addon button {
    min-width: 25px;
    height: 25px;
    font-size: 8px;
  }

  .ling-format-grid {
    grid-template-columns: 1fr;
  }

  .ling-addon-section {
    padding-block: 84px;
  }

  .ling-format-card {
    min-height: 270px;
  }

  .ling-slogan-addon {
    padding: 22px 20px;
    font-size: 14px;
  }

  .ling-media-showcase {
    margin-top: 52px;
  }

  .ling-media-card {
    border-radius: 18px;
  }
}