.page-home {
  --home-gap: 2rem;
  --home-card-radius: 12px;
  --home-glow: 0 0 20px rgba(0, 212, 255, 0.25);
  --home-heading-font: Impact, Haettenschweiler, "Arial Narrow Bold", sans-serif;
  --home-body-font: "Noto Sans SC", "Inter", system-ui, sans-serif;
  --home-particle-color: rgba(0, 212, 255, 0.15);
  --home-slider-bg: #1A1A2E;
  --home-slider-fill: linear-gradient(135deg, #00D4FF, #FF6B00);
}

/* 首屏：框景容器 + 粒子背景 */
.page-home .hero-frame {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: #0D0D0D;
}

.page-home .hero-frame__inner {
  position: relative;
  width: 100%;
  max-width: var(--content-w, 1200px);
  padding: 2rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

.page-home .hero-frame__particles {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, var(--home-particle-color) 1px, transparent 1px);
  background-size: 40px 40px;
  animation: heroParticleDrift 12s linear infinite;
  pointer-events: none;
}

@keyframes heroParticleDrift {
  0% { transform: translateY(0) scale(1); opacity: 0.6; }
  50% { transform: translateY(-20px) scale(1.05); opacity: 1; }
  100% { transform: translateY(0) scale(1); opacity: 0.6; }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .hero-frame__particles {
    animation: none;
    opacity: 0.3;
  }
}

.page-home .hero-frame__content {
  position: relative;
  z-index: 2;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 2rem;
  border: 2px solid rgba(0, 212, 255, 0.3);
  border-radius: var(--home-card-radius);
  background: rgba(13, 13, 13, 0.7);
  backdrop-filter: blur(4px);
  box-shadow: var(--home-glow);
}

.page-home .hero-frame__headline {
  font-family: var(--home-heading-font);
  font-size: clamp(2.5rem, 10vw, 7rem);
  color: #FFFFFF;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 0;
  line-height: 1.05;
  text-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
}

.page-home .hero-frame__tagline {
  font-family: var(--home-body-font);
  font-size: clamp(1rem, 3vw, 1.75rem);
  color: #B0B0B0;
  letter-spacing: 0.08em;
  font-weight: 400;
}

.page-home .hero-frame__cta {
  margin-top: 1rem;
  font-size: 1.25rem;
  padding: 0.75rem 2.5rem;
  border-radius: 50px;
  background: var(--gradient, linear-gradient(135deg, #00D4FF, #FF6B00));
  color: #FFFFFF;
  font-family: var(--home-body-font);
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
  display: inline-block;
}

.page-home .hero-frame__cta:hover,
.page-home .hero-frame__cta:focus {
  transform: scale(1.05);
  box-shadow: 0 0 24px rgba(255, 107, 0, 0.5);
  filter: brightness(1.1);
}

.page-home .hero-frame__visual {
  position: absolute;
  inset: 0;
  z-index: 0;
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.page-home .hero-frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.25;
  filter: saturate(1.2) contrast(0.9);
  display: block;
}

/* 3D卡片联赛展示区 */
.page-home .league-cards {
  padding: 4rem 1rem;
}

.page-home .section__inner {
  max-width: var(--content-w, 1200px);
  margin: 0 auto;
  width: 100%;
}

.page-home .league-cards__heading {
  font-family: var(--home-heading-font);
  font-size: clamp(2rem, 5vw, 3.5rem);
  color: #FFFFFF;
  text-align: center;
  margin: 0 0 2.5rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  background: linear-gradient(135deg, #00D4FF, #FF6B00);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-home .league-cards__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  justify-items: center;
  perspective: 800px;
}

@media (min-width: 768px) {
  .page-home .league-cards__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
  }
}

.page-home .league-card {
  width: 100%;
  max-width: 340px;
  background: #1A1A2E;
  border: 2px solid rgba(0, 212, 255, 0.4);
  border-radius: var(--home-card-radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  transform-style: preserve-3d;
  cursor: default;
  box-shadow: var(--home-glow);
}

.page-home .league-card:hover,
.page-home .league-card:focus-within {
  transform: rotateY(6deg) scale(1.02);
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.35);
}

@media (prefers-reduced-motion: reduce) {
  .page-home .league-card:hover,
  .page-home .league-card:focus-within {
    transform: scale(1.02);
  }
}

.page-home .league-card__fig {
  width: 100%;
  margin: 0;
  border-radius: 8px;
  overflow: hidden;
}

.page-home .league-card__img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border-radius: 8px;
  aspect-ratio: 1/1;
}

.page-home .league-card__title {
  font-family: var(--home-heading-font);
  font-size: 1.5rem;
  color: #FFFFFF;
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.page-home .league-card__desc {
  font-family: var(--home-body-font);
  font-size: 0.9rem;
  color: #B0B0B0;
  margin: 0;
  text-align: center;
}

/* 注册引导区 */
.page-home .register-zone {
  padding: 4rem 1rem;
  background: linear-gradient(180deg, #0D0D0D 0%, #1A1A2E 100%);
  border-top: 2px solid rgba(255, 107, 0, 0.3);
  border-bottom: 2px solid rgba(0, 212, 255, 0.3);
}

.page-home .register-zone__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: start;
}

@media (min-width: 768px) {
  .page-home .register-zone__inner {
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
  }
}

.page-home .register-zone__info {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.page-home .register-zone__heading {
  font-family: var(--home-heading-font);
  font-size: clamp(2rem, 4vw, 3rem);
  color: #FFFFFF;
  margin: 0 0 0.5rem;
  text-transform: uppercase;
}

.page-home .register-zone__desc {
  font-family: var(--home-body-font);
  font-size: 1rem;
  color: #B0B0B0;
  margin: 0;
  line-height: 1.6;
}

.page-home .register-zone__contact {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.page-home .register-zone__label {
  font-family: var(--home-body-font);
  font-size: 0.9rem;
  color: #00D4FF;
  background: rgba(0, 212, 255, 0.1);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  border: 1px solid rgba(0, 212, 255, 0.2);
}

.page-home .register-zone__mockup {
  margin: 1rem 0 0;
  max-width: 300px;
}

.page-home .register-zone__img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 16px;
  box-shadow: var(--home-glow);
  border: 1px solid rgba(0, 212, 255, 0.3);
  aspect-ratio: 3/4;
  object-fit: cover;
}

.page-home .register-zone__form-wrapper {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.page-home .register-form {
  background: #1A1A2E;
  border: 2px solid rgba(0, 212, 255, 0.4);
  border-radius: var(--home-card-radius);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  box-shadow: var(--home-glow);
}

.page-home .register-form__field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.page-home .register-form__label {
  font-family: var(--home-body-font);
  font-size: 0.85rem;
  color: #B0B0B0;
  font-weight: 500;
}

.page-home .register-form__input {
  padding: 0.7rem 1rem;
  border: 1px solid #333;
  border-radius: 8px;
  background: #0D0D0D;
  color: #FFFFFF;
  font-family: var(--home-body-font);
  font-size: 1rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-home .register-form__input:focus {
  outline: none;
  border-color: #00D4FF;
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.2);
}

.page-home .register-form__input::placeholder {
  color: #555;
}

.page-home .register-form__slider {
  width: 100%;
  height: 48px;
  background: var(--home-slider-bg);
  border-radius: 24px;
  border: 1px solid #333;
  position: relative;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.page-home .register-form__slider[data-slider="verify"] {
  background-image: linear-gradient(90deg, #00D4FF 0%, #FF6B00 100%);
  background-size: 0% 100%;
  background-repeat: no-repeat;
  transition: background-size 0.1s ease;
}

.page-home .register-form__submit {
  width: 100%;
  padding: 0.9rem;
  border: none;
  border-radius: 50px;
  background: var(--gradient, linear-gradient(135deg, #00D4FF, #FF6B00));
  color: #FFFFFF;
  font-family: var(--home-body-font);
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.page-home .register-form__submit:hover {
  transform: scale(1.02);
  box-shadow: 0 0 20px rgba(255, 107, 0, 0.4);
}

.page-home .register-form__note {
  font-family: var(--home-body-font);
  font-size: 0.8rem;
  color: #B0B0B0;
  text-align: center;
  margin: 0;
}

.page-home .register-form__note a {
  color: #00D4FF;
  text-decoration: underline;
}

/* 平台亮点摘要 */
.page-home .highlights {
  padding: 4rem 1rem;
}

.page-home .highlights__heading {
  font-family: var(--home-heading-font);
  font-size: clamp(2rem, 5vw, 3.5rem);
  color: #FFFFFF;
  text-align: center;
  margin: 0 0 3rem;
  text-transform: uppercase;
  background: linear-gradient(135deg, #FF6B00, #00D4FF);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-home .highlights__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-bottom: 3rem;
}

@media (min-width: 600px) {
  .page-home .highlights__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .page-home .highlights__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.page-home .highlight-card {
  background: #1A1A2E;
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: var(--home-card-radius);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-home .highlight-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 107, 0, 0.5);
  box-shadow: 0 8px 30px rgba(0, 212, 255, 0.15);
}

.page-home .highlight-card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-home .highlight-card__title {
  font-family: var(--home-heading-font);
  font-size: 1.25rem;
  color: #FFFFFF;
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.page-home .highlight-card__desc {
  font-family: var(--home-body-font);
  font-size: 0.9rem;
  color: #B0B0B0;
  margin: 0;
  line-height: 1.5;
}

.page-home .highlights__chart {
  max-width: 800px;
  margin: 0 auto;
  border-radius: var(--home-card-radius);
  overflow: hidden;
  border: 2px solid rgba(0, 212, 255, 0.3);
  box-shadow: var(--home-glow);
}

.page-home .highlights__img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  aspect-ratio: 4/3;
}

/* 滚动显现动画 */
[data-reveal] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

@media (prefers-reduced-motion: reduce) {
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* 组件兼容：card, cta-btn 等全局类不被重复定义 */
.page-home .card--glow {
  border-color: rgba(0, 212, 255, 0.5);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.15);
}

/* 窄屏安全 */
@media (max-width: 500px) {
  .page-home .hero-frame__content {
    padding: 1.25rem;
    border-width: 1px;
  }

  .page-home .register-form {
    padding: 1.25rem;
  }

  .page-home .highlights__grid {
    gap: 1rem;
  }
}