:root {
  color-scheme: light;
  --bg: #fbfcff;
  --ink: #070817;
  --muted: #5d6477;
  --line: rgba(15, 23, 42, 0.12);
  --panel: rgba(255, 255, 255, 0.76);
  --cyan: #18d6d8;
  --blue: #3577ff;
  --lime: #a7ef22;
  --coral: #ff6b68;
  --violet: #9a5cff;
  --shadow: 0 26px 80px rgba(29, 45, 92, 0.14);
  --page-bg:
    radial-gradient(circle at 68% 8%, rgba(86, 168, 255, 0.18), transparent 30%),
    linear-gradient(180deg, #ffffff 0%, #f7fbff 42%, #ffffff 100%);
  --header-bg: rgba(255, 255, 255, 0.66);
  --button-solid: #050507;
  --button-solid-text: #ffffff;
  --button-soft: rgba(255, 255, 255, 0.58);
  --create-bg:
    radial-gradient(circle at 74% 95%, rgba(133, 99, 255, 0.2), transparent 28%),
    linear-gradient(135deg, rgba(255,255,255,0.96), rgba(241, 247, 255, 0.86));
  --prompt-bg: rgba(255, 255, 255, 0.92);
  --prompt-button-bg: #ffffff;
  --media-shadow: 0 24px 44px rgba(34, 47, 94, 0.22);
  --visual-shadow: rgba(27, 44, 93, 0.24);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #111d3a;
  --ink: #f4f7ff;
  --muted: #c9d4ec;
  --line: rgba(215, 226, 255, 0.18);
  --panel: rgba(31, 45, 84, 0.7);
  --cyan: #5cf3ff;
  --blue: #7fabff;
  --lime: #ffd56f;
  --coral: #ff8fd8;
  --violet: #b995ff;
  --shadow: 0 30px 90px rgba(18, 24, 55, 0.28);
  --page-bg:
    radial-gradient(circle at 78% 10%, rgba(77, 169, 255, 0.34), transparent 26%),
    radial-gradient(circle at 24% 2%, rgba(255, 123, 211, 0.2), transparent 28%),
    radial-gradient(circle at 72% 78%, rgba(255, 205, 82, 0.14), transparent 26%),
    linear-gradient(145deg, #111d3a 0%, #182b58 48%, #251d57 100%);
  --header-bg: rgba(20, 30, 61, 0.66);
  --button-solid: #f4f7ff;
  --button-solid-text: #12203d;
  --button-soft: rgba(255, 255, 255, 0.13);
  --create-bg:
    radial-gradient(circle at 74% 95%, rgba(255, 143, 216, 0.16), transparent 28%),
    radial-gradient(circle at 24% 10%, rgba(92, 243, 255, 0.16), transparent 26%),
    linear-gradient(135deg, rgba(31, 45, 84, 0.82), rgba(37, 29, 87, 0.74));
  --prompt-bg: rgba(255, 255, 255, 0.13);
  --prompt-button-bg: rgba(255, 255, 255, 0.16);
  --media-shadow: 0 28px 52px rgba(18, 24, 55, 0.26);
  --visual-shadow: rgba(18, 24, 55, 0.28);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--page-bg);
  color: var(--ink);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  overflow-x: hidden;
  transition: background 240ms ease, color 240ms ease;
}

main {
  overflow: hidden;
}

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

img {
  display: block;
  max-width: 100%;
}

.site-header {
  align-items: center;
  backdrop-filter: blur(22px);
  background: var(--header-bg);
  display: flex;
  gap: 18px;
  height: 74px;
  justify-content: space-between;
  left: 0;
  padding: 0 clamp(20px, 5vw, 74px);
  position: sticky;
  top: 0;
  z-index: 50;
}

.brand {
  align-items: center;
  display: inline-flex;
  flex: 0 0 auto;
  height: 62px;
  width: clamp(260px, 25vw, 368px);
}

.brand-logo-img {
  display: block;
  height: auto;
  max-height: 58px;
  object-fit: contain;
  width: 100%;
}

.brand-logo-dark {
  display: none;
}

:root[data-theme="dark"] .brand-logo-light {
  display: none;
}

:root[data-theme="dark"] .brand-logo-dark {
  display: block;
}

.nav-links {
  align-items: center;
  display: flex;
  gap: clamp(18px, 3vw, 42px);
  font-size: 15px;
  font-weight: 800;
  margin-left: auto;
}

.header-actions {
  align-items: center;
  display: flex;
  gap: 8px;
  margin-left: auto;
}

.language-control {
  position: relative;
}

.language-button,
.theme-toggle {
  align-items: center;
  background: transparent;
  border: 1px solid color-mix(in srgb, var(--line) 84%, transparent);
  border-radius: 999px;
  color: var(--ink);
  cursor: pointer;
  display: inline-flex;
  font: inherit;
  font-size: 13px;
  font-weight: 850;
  gap: 8px;
  min-height: 38px;
  transition: background 160ms ease, border-color 160ms ease, color 160ms ease;
  justify-content: center;
}

.control-icon {
  color: color-mix(in srgb, var(--cyan) 72%, var(--blue));
  font-size: 14px;
  font-weight: 900;
  line-height: 1;
}

.language-button {
  min-width: 78px;
  padding: 0 12px;
}

.language-current {
  min-width: 28px;
  text-align: left;
}

.language-chevron {
  border-bottom: 2px solid currentColor;
  border-right: 2px solid currentColor;
  height: 7px;
  margin: -4px 1px 0 0;
  opacity: 0.74;
  transform: rotate(45deg);
  transition: transform 160ms ease;
  width: 7px;
}

.language-options {
  background: color-mix(in srgb, var(--panel) 92%, transparent);
  backdrop-filter: blur(22px);
  border: 1px solid color-mix(in srgb, var(--line) 90%, transparent);
  border-radius: 16px;
  display: grid;
  gap: 4px;
  min-width: 148px;
  opacity: 0;
  padding: 6px;
  pointer-events: none;
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  transform: translateY(-6px) scale(0.98);
  transform-origin: top right;
  transition: opacity 160ms ease, transform 160ms ease;
  z-index: 80;
}

.language-control.is-open .language-options {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

.language-control.is-open .language-chevron {
  transform: translateY(3px) rotate(225deg);
}

.language-option {
  align-items: center;
  background: transparent;
  border: 0;
  border-radius: 11px;
  color: var(--ink);
  cursor: pointer;
  display: grid;
  font: inherit;
  gap: 2px;
  grid-template-columns: 42px 1fr;
  min-height: 44px;
  padding: 7px 10px;
  text-align: left;
}

.language-option span {
  font-size: 13px;
  font-weight: 900;
}

.language-option small {
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
}

.language-option[aria-selected="true"] {
  background: color-mix(in srgb, var(--cyan) 16%, transparent);
}

.theme-toggle {
  min-width: 38px;
  padding: 0;
  width: 38px;
}

.theme-toggle-icon {
  color: #ffbf3d;
  display: block;
  height: 15px;
  position: relative;
  width: 15px;
}

.theme-toggle-icon::before {
  background: currentColor;
  border-radius: 50%;
  content: "";
  height: 9px;
  left: 3px;
  position: absolute;
  top: 3px;
  width: 9px;
}

.theme-toggle-icon::after {
  background:
    linear-gradient(currentColor, currentColor) center 0 / 1.5px 100% no-repeat,
    linear-gradient(90deg, currentColor, currentColor) 0 center / 100% 1.5px no-repeat,
    linear-gradient(45deg, transparent 44%, currentColor 45% 55%, transparent 56%),
    linear-gradient(-45deg, transparent 44%, currentColor 45% 55%, transparent 56%);
  content: "";
  inset: 0;
  position: absolute;
}

:root[data-theme="dark"] .theme-toggle-icon {
  color: #9badff;
}

:root[data-theme="dark"] .theme-toggle-icon::before {
  height: 14px;
  left: 0;
  top: 1px;
  width: 14px;
}

:root[data-theme="dark"] .theme-toggle-icon::after {
  background: color-mix(in srgb, var(--panel) 94%, transparent);
  border-radius: 50%;
  height: 13px;
  inset: auto;
  left: 5px;
  top: -1px;
  width: 13px;
}

.language-button:hover,
.theme-toggle:hover,
.language-control:focus-within,
.theme-toggle:focus-visible {
  background: color-mix(in srgb, var(--button-soft) 86%, transparent);
  border-color: color-mix(in srgb, var(--cyan) 34%, var(--line));
}

.theme-toggle:focus-visible,
.language-button:focus-visible,
.language-option:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--cyan) 58%, transparent);
  outline-offset: 3px;
}
.hero {
  align-items: center;
  display: grid;
  gap: 24px;
  grid-template-columns: minmax(360px, 0.72fr) minmax(560px, 1fr);
  margin: 0 auto;
  max-width: 1460px;
  min-height: 660px;
  padding: 36px clamp(24px, 5vw, 74px) 72px;
  position: relative;
  overflow: visible;
}

.product-matrix,
.create-panel,
.core,
.trust {
  scroll-margin-top: 96px;
}

.hero::after,
.closing::before {
  content: none;
}

.home-wave-ribbon {
  --home-ribbon-mask: radial-gradient(ellipse 142% 126% at 50% 60%, #000 0%, #000 68%, rgb(0 0 0 / 0.82) 84%, transparent 100%);
  display: block;
  filter: saturate(0.98) drop-shadow(0 34px 82px color-mix(in srgb, var(--cyan) 14%, transparent));
  left: 50%;
  mask-image: var(--home-ribbon-mask);
  mask-mode: alpha;
  mask-repeat: no-repeat;
  mask-size: 100% 100%;
  max-width: none;
  opacity: 0.82;
  pointer-events: none;
  position: absolute;
  transform: translateX(-50%);
  -webkit-mask-image: var(--home-ribbon-mask);
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-size: 100% 100%;
  width: max(3200px, 224vw);
  z-index: 0;
}

.home-wave-ribbon img {
  display: block;
  height: auto;
  max-width: none;
  width: 100%;
}

.home-wave-hero {
  bottom: -218px;
}

.home-wave-closing {
  bottom: -232px;
  opacity: 0.72;
  transform: translateX(-50%) scaleX(-1);
}

.hero-copy,
.hero-visual {
  position: relative;
  z-index: 2;
}

.hero h1 {
  font-size: clamp(64px, 7vw, 112px);
  font-weight: 900;
  letter-spacing: -0.055em;
  line-height: 0.94;
  margin: 0;
  max-width: 640px;
}

.hero h1 span {
  background: linear-gradient(135deg, var(--cyan) 0%, var(--lime) 72%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p {
  color: var(--muted);
  font-size: 18px;
  font-weight: 500;
  line-height: 1.55;
  margin: 34px 0 0;
  max-width: 420px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 34px;
}

.button {
  align-items: center;
  border-radius: 999px;
  display: inline-flex;
  font-size: 15px;
  font-weight: 800;
  gap: 13px;
  justify-content: center;
  min-height: 54px;
  min-width: 145px;
  padding: 0 24px;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-dark {
  background: var(--button-solid);
  box-shadow: 0 18px 44px rgba(3, 5, 18, 0.18);
  color: var(--button-solid-text);
}

.button-light {
  background: var(--button-soft);
  border: 1px solid var(--line);
  color: var(--ink);
}

.hero-visual {
  min-height: 560px;
}

.hero-screen {
  filter: drop-shadow(0 42px 70px var(--visual-shadow));
  margin-left: auto;
  max-width: min(820px, 58vw);
  transform: rotate(-2deg);
  width: 100%;
}

.float-card {
  filter: drop-shadow(0 18px 28px var(--visual-shadow));
  position: absolute;
  width: clamp(74px, 8vw, 118px);
}

.float-game { left: 13%; top: 8%; }
.float-social { left: 2%; top: 47%; width: clamp(66px, 7vw, 98px); }
.float-finance { left: 14%; top: 63%; width: clamp(68px, 7vw, 102px); }
.float-music { left: 43%; bottom: 0; width: clamp(70px, 8vw, 108px); }
.float-aa { right: 0; bottom: 10%; width: clamp(82px, 9vw, 128px); }

.product-matrix {
  margin: 8px auto 76px;
  max-width: 1380px;
  padding: 18px clamp(20px, 4vw, 52px) 0;
}

.matrix-heading {
  align-items: end;
  display: grid;
  gap: 20px;
  grid-template-columns: minmax(0, 0.72fr) minmax(320px, 0.5fr);
  margin: 0 auto 28px;
}

.eyebrow {
  color: color-mix(in srgb, var(--blue) 82%, var(--ink));
  display: inline-flex;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.14em;
  margin-bottom: 14px;
  text-transform: uppercase;
}

.matrix-heading h2 {
  font-size: clamp(40px, 5vw, 76px);
  font-weight: 900;
  letter-spacing: -0.048em;
  line-height: 0.98;
  margin: 0;
  max-width: 780px;
}

.matrix-heading p {
  color: var(--muted);
  font-size: clamp(15px, 1.35vw, 18px);
  line-height: 1.65;
  margin: 0;
  max-width: 540px;
}

.matrix-shell {
  background:
    radial-gradient(circle at 12% 12%, color-mix(in srgb, var(--cyan) 20%, transparent), transparent 30%),
    radial-gradient(circle at 86% 78%, color-mix(in srgb, var(--coral) 18%, transparent), transparent 28%),
    linear-gradient(135deg, color-mix(in srgb, var(--panel) 98%, transparent), color-mix(in srgb, var(--panel) 68%, transparent));
  border: 1px solid var(--line);
  border-radius: 26px;
  box-shadow: var(--shadow);
  display: grid;
  gap: clamp(18px, 2vw, 28px);
  grid-template-columns: minmax(280px, 0.38fr) minmax(0, 1fr);
  overflow: hidden;
  padding: clamp(22px, 3vw, 34px);
  position: relative;
}

.matrix-shell::before {
  background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--cyan) 36%, transparent), color-mix(in srgb, var(--lime) 30%, transparent), transparent);
  content: "";
  height: 2px;
  left: 26px;
  position: absolute;
  right: 26px;
  top: 0;
}

.matrix-core-card,
.matrix-product,
.matrix-principles article {
  background: color-mix(in srgb, var(--panel) 82%, transparent);
  border: 1px solid color-mix(in srgb, var(--line) 78%, transparent);
  box-shadow: 0 18px 48px color-mix(in srgb, var(--visual-shadow) 30%, transparent);
}

.matrix-core-card {
  align-content: center;
  border-radius: 22px;
  display: grid;
  min-height: 100%;
  padding: clamp(24px, 4vw, 38px);
}

.matrix-core-card img {
  height: auto;
  margin-bottom: 30px;
  width: min(82%, 260px);
}

.matrix-core-card span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.matrix-core-card h3 {
  font-size: clamp(28px, 3vw, 42px);
  letter-spacing: -0.035em;
  line-height: 1.04;
  margin: 12px 0 0;
  max-width: 340px;
}

.matrix-core-card p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.62;
  margin: 18px 0 0;
  max-width: 340px;
}

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

.matrix-product {
  align-items: start;
  border-radius: 20px;
  color: inherit;
  display: grid;
  gap: 18px;
  grid-template-columns: 74px minmax(0, 1fr);
  min-height: 182px;
  overflow: hidden;
  padding: 18px;
  position: relative;
  transition: background 180ms ease, border-color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.matrix-product::after {
  background: radial-gradient(circle, color-mix(in srgb, var(--product-accent, var(--cyan)) 28%, transparent), transparent 68%);
  content: "";
  height: 160px;
  opacity: 0.74;
  position: absolute;
  right: -74px;
  top: -74px;
  width: 160px;
}

.matrix-product.social { --product-accent: var(--cyan); }
.matrix-product.games { --product-accent: var(--blue); }
.matrix-product.finance { --product-accent: var(--lime); }
.matrix-product.entertainment { --product-accent: var(--coral); }
.matrix-product.tools { --product-accent: var(--violet); }
.matrix-product.creation { --product-accent: var(--cyan); }

.matrix-product img {
  height: 72px;
  object-fit: contain;
  position: relative;
  width: 72px;
  z-index: 1;
}

.matrix-product div {
  min-width: 0;
  position: relative;
  z-index: 1;
}

.matrix-product span {
  color: color-mix(in srgb, var(--product-accent, var(--cyan)) 82%, var(--ink));
  display: block;
  font-size: 12px;
  font-weight: 900;
  margin-bottom: 7px;
}

.matrix-product h3 {
  font-size: clamp(18px, 1.5vw, 23px);
  letter-spacing: -0.025em;
  line-height: 1.08;
  margin: 0;
  overflow-wrap: anywhere;
}

.matrix-product p {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.52;
  margin: 12px 0 0;
}

.matrix-product strong {
  align-items: center;
  color: color-mix(in srgb, var(--product-accent, var(--cyan)) 80%, var(--ink));
  display: inline-flex;
  font-size: 12px;
  font-weight: 900;
  gap: 8px;
  letter-spacing: 0.02em;
  margin-top: 16px;
}

.matrix-product strong::after {
  content: "→";
  font-size: 15px;
  line-height: 1;
  transition: transform 180ms ease;
}

.matrix-product:hover,
.matrix-product:focus-visible {
  background: color-mix(in srgb, var(--panel) 94%, transparent);
  border-color: color-mix(in srgb, var(--product-accent, var(--cyan)) 38%, var(--line));
  box-shadow: 0 26px 62px color-mix(in srgb, var(--visual-shadow) 36%, transparent);
  transform: translateY(-4px);
}

.matrix-product:hover strong::after,
.matrix-product:focus-visible strong::after {
  transform: translateX(4px);
}

.matrix-product:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--product-accent, var(--cyan)) 58%, transparent);
  outline-offset: 4px;
}

.matrix-principles {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 18px;
}

.matrix-principles article {
  border-radius: 18px;
  display: grid;
  gap: 8px;
  min-height: 122px;
  padding: 20px 22px;
}

.matrix-principles span {
  font-size: 16px;
  font-weight: 900;
  letter-spacing: -0.01em;
}

.matrix-principles p {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
  margin: 0;
}

:root[data-lang="zh"] .eyebrow,
:root[data-lang="zh"] .matrix-core-card span {
  letter-spacing: 0.08em;
}

:root[data-lang="zh"] .matrix-heading h2 {
  letter-spacing: -0.035em;
  max-width: 720px;
}

:root[data-lang="zh"] .matrix-heading p,
:root[data-lang="zh"] .matrix-core-card p,
:root[data-lang="zh"] .matrix-product p,
:root[data-lang="zh"] .matrix-principles p {
  line-height: 1.72;
}

.create-panel {
  background: var(--create-bg);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
  display: grid;
  grid-template-columns: minmax(220px, 0.42fr) minmax(520px, 1fr);
  margin: 0 auto;
  max-width: 1360px;
  min-height: 500px;
  overflow: hidden;
  padding: clamp(34px, 5vw, 58px);
  position: relative;
}

.create-copy {
  align-self: center;
  max-width: 320px;
  position: relative;
  z-index: 2;
}

.create-copy h2,
.section-title h2,
.closing h2 {
  font-size: clamp(38px, 4.2vw, 58px);
  font-weight: 900;
  letter-spacing: -0.032em;
  line-height: 1.02;
  margin: 0;
}

.create-copy p,
.section-title p,
.closing p {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.55;
  margin: 22px 0 0;
}

.create-copy a {
  border-bottom: 1px solid currentColor;
  display: inline-flex;
  font-weight: 800;
  gap: 14px;
  margin-top: 30px;
  padding-bottom: 3px;
}

.media-stack {
  align-items: end;
  display: grid;
  grid-template-columns: repeat(4, minmax(120px, 1fr));
  min-height: 360px;
  position: relative;
  z-index: 1;
}

.media-card {
  margin: 0;
  position: relative;
  transform-origin: center bottom;
}

.media-card:nth-child(1) { transform: translate(36px, 30px) rotate(-5deg); z-index: 1; }
.media-card:nth-child(2) { transform: translate(12px, 4px) rotate(-2deg); z-index: 3; }
.media-card:nth-child(3) { transform: translate(-10px, 2px) rotate(2deg); z-index: 2; }
.media-card:nth-child(4) { transform: translate(-40px, 26px) rotate(5deg); z-index: 1; }

.media-card span {
  align-items: center;
  display: inline-flex;
  font-size: 13px;
  font-weight: 800;
  gap: 8px;
  margin-bottom: 8px;
}

.media-card img {
  border-radius: 17px;
  box-shadow: var(--media-shadow);
  height: 285px;
  object-fit: cover;
  width: 196px;
}

.media-video::after {
  align-items: center;
  background: var(--prompt-button-bg);
  border-radius: 50%;
  box-shadow: 0 14px 36px rgba(21, 29, 65, 0.22);
  color: var(--ink);
  content: "▶";
  display: flex;
  height: 68px;
  justify-content: center;
  left: 50%;
  position: absolute;
  top: 54%;
  transform: translate(-50%, -50%);
  width: 68px;
}

.prompt-bar {
  align-items: center;
  background: var(--prompt-bg);
  border: 1px solid var(--line);
  border-radius: 18px;
  bottom: 54px;
  box-shadow: 0 18px 50px rgba(31, 43, 90, 0.16);
  display: grid;
  gap: 12px;
  grid-template-columns: 28px 1fr auto;
  left: 42%;
  max-width: 620px;
  padding: 14px 18px;
  position: absolute;
  right: 18%;
  z-index: 5;
}

.prompt-bar input {
  background: transparent;
  border: 0;
  color: var(--muted);
  font: inherit;
  min-width: 0;
  outline: 0;
}

.prompt-bar button {
  align-items: center;
  background: var(--prompt-button-bg);
  border: 1px solid var(--line);
  border-radius: 999px;
  display: inline-flex;
  font-weight: 800;
  gap: 11px;
  min-height: 42px;
  padding: 0 18px;
}

.core,
.trust {
  margin: 0 auto;
  max-width: 1160px;
  padding: 82px 24px 0;
}

.section-title {
  text-align: center;
}

.section-title h2 {
  font-size: clamp(34px, 3.2vw, 48px);
}

.section-title p {
  margin-top: 12px;
}

.core-layout {
  align-items: center;
  display: grid;
  gap: 34px;
  grid-template-columns: 1fr minmax(300px, 430px) 1fr;
  margin-top: 34px;
}

.core-orb-wrap img {
  filter: drop-shadow(0 30px 46px var(--visual-shadow));
  margin: 0 auto;
}

.core-points {
  display: grid;
  gap: 56px;
}

.core-points article {
  position: relative;
}

.core-points h3 {
  font-size: 18px;
  margin: 0;
}

.core-points p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.45;
  margin: 8px 0 12px;
}

.core-points span {
  font-size: 20px;
}

.trust {
  padding-bottom: 84px;
}

.trust-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 48px;
}

.trust-card {
  background:
    radial-gradient(circle at 50% -8%, color-mix(in srgb, var(--cyan) 18%, transparent), transparent 54%),
    linear-gradient(180deg, color-mix(in srgb, var(--panel) 98%, transparent), color-mix(in srgb, var(--panel) 66%, transparent));
  border: 1px solid color-mix(in srgb, var(--line) 78%, transparent);
  border-radius: 24px;
  box-shadow:
    inset 0 1px 0 color-mix(in srgb, #ffffff 60%, transparent),
    0 24px 56px color-mix(in srgb, var(--visual-shadow) 36%, transparent);
  display: grid;
  justify-items: center;
  min-height: 226px;
  overflow: hidden;
  padding: 26px 18px 24px;
  position: relative;
  text-align: center;
}

.trust-card::before {
  background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--ink) 12%, transparent), transparent);
  content: "";
  height: 1px;
  left: 22px;
  position: absolute;
  right: 22px;
  top: 0;
}

.trust-grid h3 {
  font-size: clamp(20px, 2vw, 25px);
  margin: 19px 0 0;
}

.trust-grid p {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin: 5px 0 0;
  text-transform: uppercase;
}

:root[data-lang="zh"] .trust-grid p {
  letter-spacing: 0;
  text-transform: none;
}

:root[data-lang="zh"] .hero h1 {
  letter-spacing: -0.035em;
  max-width: 720px;
}

:root[data-lang="zh"] .core-points p,
:root[data-lang="zh"] .trust-grid p {
  line-height: 1.6;
}

.trust-visual {
  align-items: center;
  display: grid;
  height: 112px;
  justify-items: center;
  position: relative;
  width: min(100%, 148px);
}

.trust-visual::before {
  background: radial-gradient(circle, color-mix(in srgb, var(--cyan) 20%, transparent), transparent 66%);
  content: "";
  height: 120px;
  opacity: 0.74;
  position: absolute;
  width: 120px;
}

.trust-visual::after {
  display: none;
}

.shield-visual::before {
  background: radial-gradient(circle, color-mix(in srgb, var(--lime) 20%, transparent), transparent 66%);
}

.globe-visual::before {
  background: radial-gradient(circle, color-mix(in srgb, var(--blue) 20%, transparent), transparent 66%);
}

.users-visual::before {
  background: radial-gradient(circle, color-mix(in srgb, var(--coral) 14%, transparent), transparent 66%);
}

.trust-icon-img {
  filter: drop-shadow(0 16px 18px color-mix(in srgb, var(--visual-shadow) 28%, transparent));
  height: 118px;
  object-fit: contain;
  position: relative;
  transition: filter 180ms ease, transform 180ms ease;
  width: 118px;
  z-index: 1;
}

.trust-card:hover .trust-icon-img {
  filter: drop-shadow(0 20px 24px color-mix(in srgb, var(--visual-shadow) 34%, transparent));
  transform: translateY(-2px) scale(1.03);
}

.closing {
  align-items: center;
  display: grid;
  justify-items: center;
  min-height: 420px;
  overflow: hidden;
  padding: 90px 24px 118px;
  position: relative;
  text-align: center;
}

.closing h2 {
  word-spacing: 0.08em;
}

.closing h2,
.closing p,
.closing .hero-actions {
  position: relative;
  z-index: 2;
}

.closing::before {
  bottom: 0;
  height: 110px;
  top: auto;
  transform: rotate(-4deg);
}

.closing::after {
  background: linear-gradient(100deg, color-mix(in srgb, var(--cyan) 28%, transparent), color-mix(in srgb, var(--blue) 20%, transparent), color-mix(in srgb, var(--lime) 32%, transparent), color-mix(in srgb, var(--coral) 34%, transparent));
  border-radius: 50%;
  bottom: -180px;
  content: "";
  filter: blur(28px);
  height: 330px;
  left: 0;
  position: absolute;
  right: 0;
  z-index: -1;
}

.closing .hero-actions {
  justify-content: center;
}

.site-footer {
  align-items: end;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 26px;
  grid-template-columns: minmax(240px, 1fr) auto auto;
  margin: 72px auto 0;
  max-width: 1380px;
  padding: 38px clamp(22px, 5vw, 74px) 44px;
}

.footer-brand {
  display: grid;
  gap: 14px;
}

.footer-brand .brand {
  height: 42px;
  width: 150px;
}

.footer-brand .brand-logo-img {
  max-height: 42px;
}

.footer-brand p {
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
  margin: 0;
}

.footer-links,
.footer-social {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

.footer-links a,
.footer-social a {
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 800;
  padding: 10px 13px;
  transition: background 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.footer-links a:hover,
.footer-social a:hover {
  background: color-mix(in srgb, var(--cyan) 12%, transparent);
  border-color: color-mix(in srgb, var(--cyan) 36%, var(--line));
  transform: translateY(-1px);
}

.footer-social a {
  height: 42px;
  min-width: 42px;
  text-align: center;
}

.footer-social svg {
  display: block;
  height: 18px;
  width: 18px;
}

.sr-only {
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  height: 1px;
  overflow: hidden;
  position: absolute;
  white-space: nowrap;
  width: 1px;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 650ms ease, transform 650ms ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: no-preference) {
  .float-card {
    animation: float 4.8s ease-in-out infinite;
  }

  .float-social,
  .float-aa {
    animation-delay: -1.4s;
  }

  .float-finance,
  .float-music {
    animation-delay: -2.3s;
  }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

@media (min-width: 1680px) {
  .product-matrix {
    max-width: 1500px;
  }

  .matrix-grid {
    gap: 18px;
  }

  .matrix-product {
    min-height: 196px;
    padding: 22px;
  }
}

@media (max-width: 1050px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .hero-screen {
    margin: 0 auto;
    max-width: 900px;
  }

  .hero-visual {
    min-height: auto;
  }

  .matrix-heading,
  .matrix-shell {
    grid-template-columns: 1fr;
  }

  .matrix-heading p {
    max-width: 760px;
  }

  .matrix-core-card {
    align-items: center;
    grid-template-columns: minmax(160px, 260px) minmax(0, 1fr);
    min-height: auto;
  }

  .matrix-core-card img {
    margin: 0;
  }

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

  .create-panel {
    grid-template-columns: 1fr;
  }

  .create-copy {
    max-width: 520px;
  }

  .prompt-bar {
    bottom: 34px;
    left: 12%;
    right: 12%;
  }

  .core-layout {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .core-points {
    gap: 24px;
    grid-template-columns: 1fr 1fr;
  }

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

  .site-footer {
    align-items: start;
    grid-template-columns: 1fr;
  }

  .footer-links,
  .footer-social {
    justify-content: flex-start;
  }
}

@media (max-width: 720px) {
  .site-header {
    height: 64px;
  }

  .brand {
    height: 48px;
    width: min(176px, calc(100vw - 182px));
  }

  .brand-logo-img {
    max-height: 46px;
  }

  .nav-links {
    display: none;
  }

  .header-actions {
    gap: 3px;
    margin-left: auto;
    padding: 3px;
  }

  .language-button,
  .theme-toggle {
    font-size: 12px;
    min-height: 34px;
  }

  .language-button {
    min-width: 66px;
    padding: 0 9px;
  }

  .theme-toggle {
    min-width: 34px;
    width: 34px;
  }

  .hero {
    padding: 32px 18px 52px;
  }

  .hero h1 {
    font-size: 54px;
  }

  .hero p {
    font-size: 16px;
  }

  .hero-actions,
  .button {
    width: 100%;
  }

  .hero::after {
    content: none;
  }

  .home-wave-ribbon {
    width: 1180px;
  }

  .home-wave-hero {
    bottom: -90px;
    left: 57%;
    opacity: 0.72;
  }

  .home-wave-closing {
    bottom: -98px;
    left: 53%;
  }

  .float-card {
    width: 64px;
  }

  .float-game { left: 8%; top: 4%; }
  .float-social { display: none; }
  .float-finance { left: 2%; top: 55%; }
  .float-music { left: 42%; bottom: -2%; }
  .float-aa { right: -8px; bottom: 6%; }

  .product-matrix {
    margin-bottom: 46px;
    padding: 8px 14px 0;
  }

  .matrix-heading {
    gap: 14px;
    margin-bottom: 18px;
  }

  .eyebrow {
    font-size: 12px;
    margin-bottom: 10px;
  }

  .matrix-heading h2 {
    font-size: 38px;
    line-height: 1.04;
  }

  .matrix-heading p {
    font-size: 15px;
  }

  .matrix-shell {
    border-radius: 22px;
    padding: 14px;
  }

  .matrix-core-card {
    grid-template-columns: 1fr;
    padding: 22px;
  }

  .matrix-core-card img {
    margin-bottom: 18px;
    width: min(72%, 220px);
  }

  .matrix-core-card h3 {
    font-size: 30px;
  }

  .matrix-grid,
  .matrix-principles {
    grid-template-columns: 1fr;
  }

  .matrix-product {
    gap: 14px;
    grid-template-columns: 62px minmax(0, 1fr);
    min-height: 0;
    padding: 16px;
  }

  .matrix-product img {
    height: 60px;
    width: 60px;
  }

  .matrix-product p {
    font-size: 13px;
    margin-top: 8px;
  }

  .matrix-principles {
    gap: 12px;
    margin-top: 14px;
  }

  .matrix-principles article {
    min-height: 0;
    padding: 18px;
  }

  .create-panel {
    border-radius: 0;
    margin: 0;
    padding: 44px 18px 116px;
  }

  .media-stack {
    grid-template-columns: repeat(2, minmax(120px, 1fr));
    min-height: auto;
  }

  .media-card,
  .media-card:nth-child(n) {
    transform: none;
  }

  .media-card img {
    height: 210px;
    width: 100%;
  }

  .prompt-bar {
    grid-template-columns: 24px 1fr;
    left: 18px;
    right: 18px;
  }

  .prompt-bar button {
    grid-column: 1 / -1;
    justify-content: center;
  }

  .core,
  .trust {
    padding-top: 58px;
  }

  .core-points,
  .trust-grid {
    grid-template-columns: 1fr;
  }

  .site-footer {
    margin-top: 52px;
    padding-top: 30px;
  }

  .footer-links,
  .footer-social {
    gap: 8px;
  }

  .footer-links a,
  .footer-social a {
    font-size: 12px;
    padding: 9px 11px;
  }
}