@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Noto+Sans+SC:wght@400;500;600;700&display=swap');

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  position: relative;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 0%, black 20%, transparent 75%);
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(ellipse 70% 50% at 15% -5%, rgba(99, 102, 241, 0.14), transparent 55%),
    radial-gradient(ellipse 55% 40% at 85% 5%, rgba(34, 211, 238, 0.08), transparent 50%),
    radial-gradient(ellipse 50% 35% at 50% 100%, rgba(139, 92, 246, 0.07), transparent 45%);
  animation: ambientDrift 18s ease-in-out infinite alternate;
}

@keyframes ambientDrift {
  0% { transform: translate3d(0, 0, 0) scale(1); }
  100% { transform: translate3d(-2%, 1.5%, 0) scale(1.03); }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes floatSoft {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes modalFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes modalScaleIn {
  from {
    opacity: 0;
    transform: scale(0.94) translateY(12px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

@keyframes shimmer {
  0% { transform: translateX(-120%); }
  100% { transform: translateX(120%); }
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition:
    opacity var(--motion-duration) var(--motion-ease),
    transform var(--motion-duration) var(--motion-ease);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}

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

.reveal--hero {
  opacity: 0;
  transform: translateY(16px);
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary-hover);
}

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

.container {
  width: min(100%, var(--content-max));
  margin-inline: auto;
  padding-inline: var(--page-x);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(30, 34, 50, 0.9);
  backdrop-filter: blur(16px) saturate(1.2);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition-slow), background var(--transition-slow);
}

.site-header.is-scrolled {
  background: rgba(30, 34, 50, 0.97);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 1.5rem;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-text);
}

.site-logo:hover {
  color: var(--color-text);
}

.site-logo__icon {
  width: 32px;
  height: 32px;
  color: var(--color-accent);
  filter: drop-shadow(0 0 8px rgba(34, 211, 238, 0.4));
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav a {
  padding: 0.5rem 0.75rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}

.site-nav a:hover {
  color: var(--color-text);
  background: var(--color-bg-glass);
}

.site-nav a.is-active {
  color: var(--color-accent);
  background: var(--color-primary-light);
  box-shadow: inset 0 -2px 0 var(--color-primary);
}

.site-nav a.btn {
  font-weight: 600;
}

.site-nav a.btn-primary {
  color: #fff;
  background: var(--gradient-brand);
  box-shadow: var(--glow-primary);
}

.site-nav a.btn-primary:hover:not(:disabled) {
  color: #fff;
  filter: brightness(1.08);
}

.site-nav a.btn-ghost {
  color: var(--color-text-secondary);
  background: transparent;
}

.site-nav a.btn-ghost:hover:not(:disabled) {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.site-nav__auth {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: 0.5rem;
  padding-left: 0.75rem;
  border-left: 1px solid var(--color-border);
}

.site-nav__account {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.6rem 0.35rem 0.35rem;
  border-radius: var(--radius-md);
  color: var(--color-text);
  background: var(--color-bg-glass);
  border: 1px solid var(--color-border);
  transition: border-color var(--transition), background var(--transition);
  max-width: 11rem;
}

.site-nav__account:hover {
  color: var(--color-text);
  background: rgba(99, 102, 241, 0.12);
  border-color: rgba(99, 102, 241, 0.35);
}

.site-nav__account.is-active {
  color: var(--color-accent);
  background: var(--color-primary-light);
  border-color: rgba(99, 102, 241, 0.45);
  box-shadow: inset 0 -2px 0 var(--color-primary);
}

.site-nav__avatar {
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  overflow: hidden;
  flex-shrink: 0;
  background: var(--gradient-brand);
  color: #fff;
  font-size: 0.6875rem;
  font-weight: 700;
}

.site-nav__avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.site-nav__avatar-initials {
  line-height: 1;
}

.site-nav__account-name {
  font-size: 0.875rem;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.site-nav__toggle {
  display: none;
  padding: 0.5rem;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--color-text);
}

.site-nav__toggle svg {
  width: 20px;
  height: 20px;
}

/* Buttons */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.4;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  overflow: hidden;
  transition:
    background var(--transition),
    border-color var(--transition),
    color var(--transition),
    box-shadow var(--transition),
    transform var(--transition-fast);
  text-decoration: none;
}

.btn:not(:disabled):hover {
  transform: translateY(-2px);
}

.btn:not(:disabled):active {
  transform: translateY(0);
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--gradient-brand);
  color: #fff;
  box-shadow: var(--glow-primary);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-primary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    transparent 35%,
    rgba(255, 255, 255, 0.22) 50%,
    transparent 65%
  );
  transform: translateX(-120%);
  transition: transform 0.55s ease;
  pointer-events: none;
}

.btn-primary:hover:not(:disabled) {
  color: #fff;
  filter: brightness(1.08);
  box-shadow: var(--glow-primary), var(--shadow-md);
}

.btn-primary:hover:not(:disabled)::after {
  transform: translateX(120%);
}

.btn-secondary {
  background: var(--color-bg-glass);
  color: var(--color-text);
  border-color: var(--color-border);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover:not(:disabled) {
  border-color: rgba(99, 102, 241, 0.45);
  background: rgba(99, 102, 241, 0.1);
  box-shadow: var(--glow-primary);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.btn-lg {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
}

.btn-block {
  width: 100%;
}

/* Cards */
.card {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.card--highlight {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary), var(--shadow-md);
}

/* Sections */
.section {
  padding: 4rem 0;
}

.section--sm {
  padding: 2.5rem 0;
}

.section__title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.hero__title {
  font-size: clamp(2rem, 4.5vw, 2.75rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.section__subtitle {
  color: var(--color-text-secondary);
  font-size: 1.0625rem;
  max-width: 36rem;
}

.section__head {
  text-align: center;
  margin-bottom: 2.5rem;
}

.section__head .section__subtitle {
  margin-inline: auto;
}

.section__eyebrow {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
}

/* Hero */
.hero {
  padding: 3.5rem 0 2.5rem;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.hero__eyebrow {
  margin-bottom: 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin-bottom: 1.5rem;
}

.hero__tags li {
  padding: 0.3rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.03);
}

.hero__tags li:nth-child(2) {
  color: var(--color-green);
  border-color: rgba(52, 211, 153, 0.3);
}

.hero__desc {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  margin-bottom: 1.25rem;
  max-width: 30rem;
  line-height: 1.65;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.hero__meta {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* Highlights */
.highlights {
  padding-top: 0;
}

.highlights-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.highlight-card {
  padding: 1.5rem;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.highlight-card:hover {
  border-color: rgba(99, 102, 241, 0.35);
  box-shadow: var(--shadow-sm);
}

.highlight-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  margin-bottom: 1rem;
  font-size: 1.125rem;
  font-weight: 700;
  border-radius: var(--radius-md);
}

.highlight-card--size .highlight-card__icon {
  color: var(--color-primary-hover);
  background: var(--color-primary-light);
  font-size: 1.25rem;
}

.highlight-card--green .highlight-card__icon {
  color: var(--color-green);
  background: var(--color-green-muted);
}

.highlight-card--green .highlight-card__icon svg {
  width: 1.5rem;
  height: 1.5rem;
}

.highlight-card--ai .highlight-card__icon {
  color: var(--color-accent);
  background: var(--color-accent-muted);
}

.highlight-card--ai .highlight-card__icon svg {
  width: 1.5rem;
  height: 1.5rem;
}

.highlight-card__title {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 0.375rem;
}

.highlight-card__desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.55;
}

.hero__visual {
  display: flex;
  justify-content: center;
  width: 100%;
}

.hero-video {
  width: 100%;
  max-width: 520px;
  margin: 0;
}

.hero-preview__frame {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.hero-preview__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  border-radius: inherit;
}

.hero-preview.is-screenshot .hero-video__frame {
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(99, 102, 241, 0.15);
}

.hero-preview.is-ready .hero-video__placeholder {
  background: linear-gradient(to top, rgba(30, 34, 50, 0.65) 0%, transparent 55%);
}

/* Product showcase */
.showcase__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: clamp(2rem, 4vw, 3rem);
  align-items: center;
}

.showcase__copy .section__head {
  text-align: left;
  margin-bottom: 0;
}

.showcase__copy .section__subtitle {
  margin-inline: 0;
  margin-bottom: 1.25rem;
}

.showcase__points {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.showcase__points li {
  position: relative;
  padding-left: 1.125rem;
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
}

.showcase__points li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 8px rgba(34, 211, 238, 0.5);
}

.showcase__figure {
  margin: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--color-bg-deep);
}

.showcase__figure.js-lightbox-trigger,
.hero-preview.is-screenshot .hero-preview__frame {
  cursor: zoom-in;
}

.showcase__figure img {
  display: block;
  width: 100%;
  height: auto;
  vertical-align: middle;
}

.hero-video.is-visible {
  animation: floatSoft 7s ease-in-out infinite;
}

.hero-video__frame {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: linear-gradient(145deg, #262b3a 0%, #2f3548 100%);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.hero-video__frame::before {
  display: none;
}

.hero-video__player {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: var(--color-bg-deep);
}

.hero-video__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.625rem;
  padding: 1.5rem;
  text-align: center;
}

.hero-video__play {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 4.5rem;
  height: 4.5rem;
  margin-bottom: 0.25rem;
  border: none;
  border-radius: 50%;
  color: #fff;
  background: var(--color-primary);
  box-shadow: 0 8px 24px rgba(79, 70, 229, 0.35);
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
}

.hero-video__play svg {
  width: 1.75rem;
  height: 1.75rem;
  margin-left: 0.2rem;
}

.hero-video__play:hover:not(:disabled) {
  transform: scale(1.05);
  box-shadow: 0 10px 28px rgba(79, 70, 229, 0.45);
}

.hero-video__play:disabled {
  opacity: 0.72;
  cursor: default;
}

.hero-video__caption {
  font-size: 1.0625rem;
  font-weight: 600;
  color: #f8fafc;
}

.hero-video__hint {
  font-size: 0.875rem;
  color: #94a3b8;
  max-width: 16rem;
}

.hero-video__label {
  margin-top: 0.875rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  text-align: center;
}

.hero-video.is-playing .hero-video__placeholder {
  opacity: 0;
  pointer-events: none;
}

.hero-video.is-ready .hero-video__play:not(:disabled) {
  background: rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.hero-video.is-ready .hero-video__hint {
  display: none;
}

/* Feature grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.feature-card {
  padding: 1.5rem;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.feature-card:hover {
  border-color: rgba(99, 102, 241, 0.3);
  box-shadow: var(--shadow-sm);
}

.feature-card__icon {
  width: 40px;
  height: 40px;
  margin-bottom: 1rem;
  padding: 0.5rem;
  color: var(--color-accent);
  background: var(--color-accent-muted);
  border-radius: var(--radius-md);
  transition: transform var(--transition-slow), background var(--transition);
}

.feature-card:hover .feature-card__icon {
  transform: scale(1.08);
  background: rgba(79, 70, 229, 0.16);
}

.feature-card__title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.375rem;
}

.feature-card__desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

/* Platform cards */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.platform-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.platform-card:hover {
  border-color: rgba(99, 102, 241, 0.3);
  box-shadow: var(--shadow-sm);
}

.platform-card.is-recommended {
  border-color: rgba(99, 102, 241, 0.45);
}

.platform-card__tag {
  position: absolute;
  top: 1rem;
  right: 1rem;
  padding: 0.125rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-primary-light);
  border-radius: var(--radius-pill);
}

.platform-card__name {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.platform-card__arch {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.platform-card__meta {
  list-style: none;
  margin-bottom: 1.25rem;
}

.platform-card__meta li {
  display: flex;
  justify-content: space-between;
  padding: 0.375rem 0;
  font-size: 0.875rem;
  border-bottom: 1px solid var(--color-border);
}

.platform-card__meta li:last-child {
  border-bottom: none;
}

.platform-card__meta li span:first-child {
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.platform-card__meta li span:last-child {
  text-align: right;
  max-width: 58%;
  word-break: break-all;
  color: var(--color-text);
}

.platform-card__soon {
  opacity: 0.65;
}

.platform-card__actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.platform-card__history:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-height: min(60vh, 28rem);
  overflow: auto;
  margin-bottom: 1rem;
}

.history-list__empty {
  text-align: center;
  color: var(--color-text-muted);
  padding: 1.5rem 0;
}

.history-item {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.875rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg-elevated);
}

.history-item__version {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.history-item__meta {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.history-item__notes {
  margin-top: 0.375rem;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.modal--wide {
  width: min(100%, 36rem);
}

.btn-sm {
  padding: 0.375rem 0.875rem;
  font-size: 0.8125rem;
  white-space: nowrap;
}

.btn.is-disabled,
a.btn.is-disabled {
  pointer-events: none;
  opacity: 0.55;
}

.contact-qq {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  max-width: 40rem;
  margin-inline: auto;
}

.contact-qq--row {
  max-width: none;
  margin-inline: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.contact-qq--row .contact-qq__item {
  align-items: flex-start;
  text-align: left;
  min-width: 0;
}

.contact-qq__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.375rem;
  min-width: min(100%, 18rem);
  padding: 1.25rem 1.5rem;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  transition:
    border-color var(--transition),
    box-shadow var(--transition-slow),
    transform var(--transition-slow);
}

.contact-qq__item:hover {
  transform: translateY(-4px);
  border-color: var(--color-primary-muted);
  box-shadow: var(--shadow-md);
}

.contact-qq__label {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.contact-qq__value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-accent);
  text-align: center;
  line-height: 1.5;
}

.contact-qq__value:hover {
  color: var(--color-primary-hover);
}

/* Footer */
.site-footer {
  padding: 2.5rem 0;
  margin-top: 2rem;
  border-top: 1px solid var(--color-border);
  background: rgba(24, 27, 40, 0.85);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-footer__copy {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.site-footer__links {
  display: flex;
  gap: 1.25rem;
}

.site-footer__links a {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.site-footer__links a:hover {
  color: var(--color-primary);
}

/* Alerts */
.alert {
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
}

.alert--error {
  color: #fca5a5;
  background: var(--color-error-bg);
  border: 1px solid rgba(248, 113, 113, 0.35);
}

.alert--success {
  color: var(--color-success);
  background: var(--color-success-bg);
  border: 1px solid rgba(52, 211, 153, 0.35);
}

.alert[hidden] {
  display: none;
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(8px);
  animation: modalFadeIn 0.25s ease;
}

.modal-overlay[hidden] {
  display: none;
}

.modal {
  width: min(100%, 400px);
  padding: 1.75rem;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg), var(--glow-primary);
  text-align: center;
  animation: modalScaleIn 0.32s var(--motion-ease);
}

.modal__title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.modal__desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: 1.25rem;
}

.modal__qr {
  width: 180px;
  height: 180px;
  margin: 0 auto 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.modal__status {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.modal__actions {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
}

/* Image lightbox */
.lightbox-overlay {
  position: fixed;
  inset: 0;
  z-index: 250;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(1rem, 3vw, 2rem);
  background: rgba(8, 10, 18, 0.88);
  backdrop-filter: blur(10px);
  animation: modalFadeIn 0.2s ease;
}

.lightbox-overlay[hidden] {
  display: none;
}

.lightbox__close {
  position: absolute;
  top: clamp(0.75rem, 2vw, 1.25rem);
  right: clamp(0.75rem, 2vw, 1.25rem);
  z-index: 1;
  width: 40px;
  height: 40px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.06);
  color: var(--color-text);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
}

.lightbox__close:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.2);
}

.lightbox__img {
  display: block;
  max-width: min(100%, 1280px);
  max-height: calc(100vh - 4rem);
  width: auto;
  height: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  object-fit: contain;
  animation: modalScaleIn 0.28s var(--motion-ease);
}

/* Responsive */
@media (max-width: 900px) {
  .hero__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .hero__visual {
    order: -1;
  }

  .showcase__grid {
    grid-template-columns: 1fr;
  }

  .feature-grid,
  .platform-grid,
  .highlights-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .site-nav__toggle {
    display: flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    padding: 1rem var(--page-x);
    background: var(--color-bg-elevated);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    opacity: 0;
    transform: translateY(-8px);
    pointer-events: none;
    transition:
      opacity var(--transition-slow),
      transform var(--transition-slow);
  }

  .site-nav.is-open {
    display: flex;
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .site-nav__auth {
    margin-left: 0;
    padding-left: 0;
    border-left: none;
    padding-top: 0.5rem;
    border-top: 1px solid var(--color-border);
  }

  .site-header__inner {
    position: relative;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  body::after,
  .hero-video.is-visible,
  .modal-overlay,
  .modal,
  .lightbox-overlay,
  .lightbox__img {
    animation: none !important;
  }

  .reveal,
  .reveal--hero {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .btn:not(:disabled):hover,
  .feature-card:hover,
  .platform-card:hover,
  .contact-qq__item:hover {
    transform: none;
  }

  .btn-primary::after {
    display: none;
  }
}