/* NovaSphere Gaming Inc. — Design tokens from Pencil */
:root {
  --bg-dark: #0A0E1A;
  --bg-card: #121829;
  --bg-card-hover: #1A2235;
  --bg-footer: #060912;
  --accent-purple: #8B5CF6;
  --accent-cyan: #06B6D4;
  --accent-blue: #3B82F6;
  --text-primary: #FFFFFF;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --border-subtle: #1E293B;
  --header-height: 80px;
  --hero-height: 720px;
  --hero-padding-x: clamp(1.25rem, calc((100vw - 1200px) / 2), 360px);
  --section-padding-y: 80px;
  --section-padding-x: 1.25rem;
  --container-max: 1200px;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 20px;
  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

a:hover {
  color: var(--accent-purple);
}

/* ── Layout ── */
.ns-container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--section-padding-x);
}

@media (min-width: 768px) {
  :root {
    --section-padding-x: 2rem;
  }
}

@media (min-width: 1200px) {
  :root {
    --section-padding-x: 2.5rem;
  }
}

.section {
  padding-block: var(--section-padding-y);
}

.section--card {
  background-color: var(--bg-card);
}

.section-label {
  color: var(--accent-purple);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.125em;
  text-transform: uppercase;
  margin-bottom: 0;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 0;
}

.section-title--lg {
  font-size: clamp(2rem, 5vw, 3.25rem);
}

/* ── Header ── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1030;
  height: var(--header-height);
  background: rgba(10, 14, 26, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), background var(--transition);
}

.site-header.is-scrolled {
  border-bottom-color: var(--border-subtle);
  background: rgba(10, 14, 26, 0.95);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: 1920px;
  margin-inline: auto;
  padding-inline: var(--hero-padding-x);
}

.site-logo img {
  height: 48px;
  width: auto;
}

@media (min-width: 768px) {
  .site-logo img {
    height: 56px;
  }
}

.site-nav {
  display: none;
  align-items: center;
  gap: 2rem;
}

.site-nav a {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  font-weight: 500;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--text-primary);
}

@media (min-width: 1200px) {
  .site-nav {
    display: flex;
  }
}

.btn-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary) !important;
  background: linear-gradient(180deg, var(--accent-purple) 0%, #6366F1 100%);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  white-space: nowrap;
}

.btn-cta:hover {
  color: var(--text-primary) !important;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(139, 92, 246, 0.35);
}

.btn-cta--solid {
  background: var(--accent-purple);
}

.btn-cta--lg {
  padding: 1rem 2rem;
}

.btn-cta--header {
  display: none;
}

@media (min-width: 1200px) {
  .btn-cta--header {
    display: inline-flex;
  }
}

/* Mobile menu toggle */
.menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 1040;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.menu-toggle.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (min-width: 1200px) {
  .menu-toggle {
    display: none;
  }
}

.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 1025;
  background: rgba(10, 14, 26, 0.98);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--transition), visibility var(--transition);
}

.mobile-nav.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.mobile-nav a {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.mobile-nav .btn-cta {
  margin-top: 1rem;
}

/* ── Hero Carousel ── */
.hero {
  position: relative;
  height: var(--hero-height);
  margin-top: var(--header-height);
}

.hero__viewport {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
  cursor: grab;
}

.hero.is-dragging .hero__viewport {
  cursor: grabbing;
}

.hero.is-dragging {
  user-select: none;
}

.hero.is-dragging a {
  pointer-events: none;
}

.hero__slides {
  display: flex;
  height: var(--hero-height);
  transition: transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

.hero__slide {
  position: relative;
  flex: 0 0 100%;
  min-width: 100%;
  width: 100%;
  height: var(--hero-height);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

/* Banner 2–5: 文字下方黑色半透明遮罩 65% */
.hero__slide:not(.hero__slide--left) .hero__overlay {
  background: rgba(0, 0, 0, 0.65);
  opacity: 1;
  z-index: 1;
}

/* Banner 1 默认 overlay（非居中 banner 不应用上方规则时已排除） */
.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(10, 14, 26, 0.9) 0%,
    rgba(10, 14, 26, 0.5) 50%,
    rgba(10, 14, 26, 0.8) 100%
  );
  opacity: 0.5;
}

/* Banner 1: 左→右渐变（设计稿 bdzkY，左侧深、右侧透明） */
.hero__slide--left .hero__overlay {
  opacity: 1;
  background: linear-gradient(
    90deg,
    rgba(10, 14, 26, 0.92) 0%,
    rgba(10, 14, 26, 0.72) 30%,
    rgba(10, 14, 26, 0.4) 55%,
    rgba(10, 14, 26, 0.12) 75%,
    rgba(10, 14, 26, 0) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 100%;
  height: 100%;
  max-width: 1920px;
  margin-inline: auto;
  padding-inline: var(--hero-padding-x);
}

.hero__content--left {
  align-items: flex-start;
  text-align: left;
}

.hero__content--center {
  align-items: center;
  text-align: center;
}

.hero__content-inner {
  display: flex;
  flex-direction: column;
  width: 100%;
}

.hero__content--left .hero__content-inner {
  max-width: 800px;
  gap: 24px;
  align-items: flex-start;
}

.hero__content--center .hero__content-inner {
  max-width: 1200px;
  align-items: center;
  gap: 20px;
}

.hero__content-inner .btn-cta {
  align-self: flex-start;
  width: fit-content;
}

.hero__content--center .hero__content-inner .btn-cta {
  align-self: center;
}

.hero__title {
  font-size: clamp(1.75rem, 2.708vw, 3.25rem);
  font-weight: 700;
  line-height: 1;
  margin: 0;
  color: var(--text-primary);
}

.hero__content--left .hero__title {
  max-width: 800px;
}

.hero__content--center .hero__title {
  max-width: 1200px;
}

.hero__desc {
  font-size: clamp(0.9375rem, 1.042vw, 1.25rem);
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0;
}

.hero__content--left .hero__desc {
  max-width: 680px;
}

.hero__content--center .hero__desc {
  max-width: 1200px;
}

.hero__dots {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 12px;
}

.hero__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.75);
  border: none;
  padding: 0;
  cursor: pointer;
  transition: width var(--transition), height var(--transition), background var(--transition);
}

.hero__dot.is-active {
  width: 12px;
  height: 12px;
  background: var(--accent-purple);
}

@media (prefers-reduced-motion: reduce) {
  .hero__slides {
    transition: none;
  }
}

/* Mobile: maintain layout, scale typography */
@media (max-width: 767px) {
  .hero__content--left .hero__content-inner,
  .hero__content--left .hero__title,
  .hero__content--left .hero__desc {
    max-width: 100%;
  }
}

@media (min-width: 1920px) {
  .hero__title {
    font-size: 3.25rem;
  }

  .hero__desc {
    font-size: 1.25rem;
  }
}

/* ── About ── */
.about-section {
  position: relative;
  height: 720px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  background-size: cover;
  background-position: center left;
  background-repeat: no-repeat;
  padding: 100px var(--hero-padding-x);
  overflow: hidden;
}

.about-section::before {
  content: "";
  position: absolute;
  inset: 0;
  /* 设计稿：右→左渐变，右侧深色、左侧透出背景图 */
  background: linear-gradient(
    270deg,
    #0a0e1a 0%,
    #0a0e1a 28%,
    rgba(10, 14, 26, 0.55) 50%,
    rgba(0, 0, 0, 0) 76%
  );
  pointer-events: none;
}

.about-section__content {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 560px;
  margin-left: auto;
  display: flex;
  flex-direction: column;
  gap: 24px;
  text-align: left;
}

.about-section__title {
  font-size: clamp(2rem, 2.708vw, 3.25rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
  margin: 0;
}

.about-section__body {
  font-size: clamp(1rem, 1.042vw, 1.25rem);
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.9);
  margin: 0;
}

@media (min-width: 1920px) {
  .about-section__title {
    font-size: 3.25rem;
  }

  .about-section__body {
    font-size: 1.25rem;
  }
}

@media (max-width: 767px) {
  .about-section {
    min-height: 720px;
    padding-block: 100px;
    align-items: center;
  }

  .about-section__content {
    max-width: 100%;
  }
}

/* ── Vision Cards ── */
.vision-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .vision-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.vision-card {
  background: var(--bg-card-hover);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: transform var(--transition), border-color var(--transition);
}

.vision-card:hover {
  transform: translateY(-4px);
  border-color: rgba(139, 92, 246, 0.3);
}

.vision-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(139, 92, 246, 0.125);
  color: var(--accent-purple);
}

.vision-card__title {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0;
}

.vision-card__desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* ── What We Do ── */
.whatwedo-header {
  text-align: center;
  margin-bottom: 3rem;
}

.whatwedo-header .section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: 0.75rem;
}

.whatwedo-header p {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 560px;
  margin-inline: auto;
}

.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: stretch;
}

@media (min-width: 576px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.service-card {
  background: var(--bg-card-hover);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  height: 100%;
  min-height: 218px;
  transition: transform var(--transition), border-color var(--transition);
}

.service-card:hover {
  transform: translateY(-4px);
  border-color: rgba(139, 92, 246, 0.3);
}

.service-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(139, 92, 246, 0.125);
  color: var(--accent-purple);
}

.service-card__title {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0;
}

.service-card__desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin: 0;
  flex: 1;
}

/* ── Featured Product ── */
.featured {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
}

@media (min-width: 992px) {
  .featured {
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
  }
}

.featured__image {
  border-radius: 24px;
  overflow: hidden;
}

.featured__image img {
  width: 100%;
  border-radius: 24px;
}

.featured__content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 24px;
}

.featured__btn {
  align-self: flex-start;
  width: fit-content;
  padding: 14px 28px;
  font-size: 0.9375rem;
}

.featured__title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  margin: 0;
}

.featured__desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
}

.feature-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9375rem;
  color: var(--text-primary);
}

.feature-list li i,
.feature-list li svg {
  color: var(--accent-purple);
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}

/* ── Why Choose ── */
.why-choose {
  position: relative;
  background-size: cover;
  background-position: center;
}

.why-choose::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
}

.why-choose .ns-container {
  position: relative;
  z-index: 1;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

@media (min-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stat-item {
  text-align: center;
}

.stat-item__number {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  background: linear-gradient(180deg, var(--accent-purple) 0%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

.stat-item__label {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* ── Technology ── */
.tech-section {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
}

@media (min-width: 992px) {
  .tech-section {
    grid-template-columns: 1fr 1fr;
    gap: 3.75rem;
  }
}

.tech-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.tech-list li {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 1.0625rem;
  font-weight: 500;
}

.tech-list__dot {
  width: 8px;
  height: 8px;
  border-radius: 4px;
  background: var(--accent-purple);
  flex-shrink: 0;
}

.tech-illustration {
  border-radius: var(--radius-md);
  overflow: hidden;
}

.tech-illustration img {
  width: 100%;
  border-radius: var(--radius-md);
}

/* ── Values ── */
.values-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

@media (min-width: 768px) {
  .values-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.value-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  text-align: center;
}

.value-item__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(139, 92, 246, 0.08);
  border: 1px solid rgba(139, 92, 246, 0.25);
  color: var(--accent-purple);
}

.value-item__label {
  font-size: 1.125rem;
  font-weight: 600;
}

/* ── Responsible Entertainment ── */
.responsible-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: clamp(2rem, 5vw, 3rem);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  max-width: 1200px;
  margin-inline: auto;
}

.responsible-card__icon {
  position: relative;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.25) 0%, rgba(59, 130, 246, 0.25) 100%);
  border: 2px solid var(--accent-purple);
  display: flex;
  align-items: center;
  justify-content: center;
}

.responsible-card__icon-inner {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  border: 1.5px solid rgba(139, 92, 246, 0.44);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-purple);
}

.responsible-card__title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  margin: 0;
}

.responsible-card__body {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 900px;
  margin: 0;
}

/* ── Footer ── */
.site-footer {
  background: var(--bg-footer);
  padding-block: 3.75rem 2.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

@media (min-width: 576px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 992px) {
  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
    gap: 2.5rem;
  }
}

.footer-brand img {
  height: 64px;
  width: auto;
  max-width: 220px;
  object-fit: contain;
  margin-bottom: 1rem;
}

.footer-brand p {
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-col a,
.footer-col li {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.footer-contact-item i,
.footer-contact-item svg {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  margin-top: 2px;
}

.footer-divider {
  height: 1px;
  background: var(--border-subtle);
  margin-block: 2.5rem;
}

.footer-copyright {
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ── Utilities ── */
.text-center {
  text-align: center;
}

.mb-section-title {
  margin-bottom: 3rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ── Back to top ── */
.back-to-top {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  z-index: 1060;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid #8B5CF6;
  background: #8B5CF6;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition), background var(--transition), border-color var(--transition);
  box-shadow: 0 8px 24px rgba(139, 92, 246, 0.35);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: #7c3aed;
  border-color: #7c3aed;
}

.back-to-top svg {
  width: 22px;
  height: 22px;
}

@media (max-width: 767px) {
  .back-to-top {
    right: 1rem;
    bottom: 1rem;
    width: 44px;
    height: 44px;
  }
}