/**
 * Star Photo Share System
 * Style CSS - 首页样式
 * Version 1.0
 * 2026-07-17
 *
 * 功能：星空首页 Hero、班级星球、完成率等样式
 */

/* ========================================
   Hero 区段
   ======================================== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-8);
  position: relative;
}

.hero__stars {
  font-size: var(--font-size-xl);
  letter-spacing: 8px;
  color: var(--star-yellow);
  margin-bottom: var(--space-6);
  animation: twinkle 3s ease-in-out infinite;
}

.hero__title {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
  background: linear-gradient(135deg, var(--star-yellow), var(--primary-light), var(--secondary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-4);
  line-height: 1.2;
}

.hero__subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--space-3);
  font-weight: var(--font-weight-regular);
}

.hero__tagline {
  font-size: var(--font-size-md);
  color: var(--text-tertiary);
  margin-bottom: var(--space-10);
  font-style: italic;
}

.hero__cta {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  justify-content: center;
}

.hero__scroll-hint {
  position: absolute;
  bottom: var(--space-10);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-muted);
  font-size: var(--font-size-sm);
  animation: float 2s ease-in-out infinite;
  cursor: pointer;
}

.hero__scroll-arrow {
  font-size: var(--font-size-xl);
}

/* ========================================
   Class Galaxy 区段
   ======================================== */
.class-galaxy {
  padding: var(--space-20) var(--space-6);
  max-width: var(--max-width);
  margin: 0 auto;
}

.class-galaxy__title {
  text-align: center;
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-4);
  color: var(--text-primary);
}

.class-galaxy__subtitle {
  text-align: center;
  font-size: var(--font-size-md);
  color: var(--text-tertiary);
  margin-bottom: var(--space-12);
}

/* ========================================
   星球网格
   ======================================== */
.planet-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-8);
  max-width: 1000px;
  margin: 0 auto;
  padding: var(--space-6);
}

/* ========================================
   星球卡片
   ======================================== */
.planet-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-8) var(--space-6);
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
}

.planet-card:hover {
  transform: translateY(-6px) rotate(2deg);
}

.planet-card:hover .planet-card__glow {
  opacity: 1;
}

.planet-card:active {
  transform: scale(0.95);
}

/* 星球本体 */
.planet-card__sphere {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  position: relative;
  margin-bottom: var(--space-6);
  transition: all var(--transition-normal);
}

.planet-card:hover .planet-card__sphere {
  transform: scale(1.1);
}

/* 星球发光 */
.planet-card__glow {
  position: absolute;
  inset: -20px;
  border-radius: 50%;
  opacity: 0.5;
  transition: all var(--transition-normal);
  z-index: -1;
  pointer-events: none;
}

/* 不同星球的颜色 */
.planet--blue .planet-card__sphere {
  background: radial-gradient(circle at 35% 35%, #60A5FA, #2563EB, #1E3A5F);
  box-shadow: 0 0 40px rgba(37, 99, 235, 0.5), inset 0 -10px 20px rgba(0, 0, 0, 0.3);
}

.planet--blue .planet-card__glow {
  background: radial-gradient(circle, rgba(37, 99, 235, 0.4), transparent);
}

.planet--purple .planet-card__sphere {
  background: radial-gradient(circle at 35% 35%, #A78BFA, #7C3AED, #3B1F6E);
  box-shadow: 0 0 40px rgba(124, 58, 237, 0.5), inset 0 -10px 20px rgba(0, 0, 0, 0.3);
}

.planet--purple .planet-card__glow {
  background: radial-gradient(circle, rgba(124, 58, 237, 0.4), transparent);
}

.planet--cyan .planet-card__sphere {
  background: radial-gradient(circle at 35% 35%, #67E8F9, #06B6D4, #164E63);
  box-shadow: 0 0 40px rgba(6, 182, 212, 0.5), inset 0 -10px 20px rgba(0, 0, 0, 0.3);
}

.planet--cyan .planet-card__glow {
  background: radial-gradient(circle, rgba(6, 182, 212, 0.4), transparent);
}

.planet--gold .planet-card__sphere {
  background: radial-gradient(circle at 35% 35%, #FDE68A, #F59E0B, #78350F);
  box-shadow: 0 0 40px rgba(245, 158, 11, 0.5), inset 0 -10px 20px rgba(0, 0, 0, 0.3);
}

.planet--gold .planet-card__glow {
  background: radial-gradient(circle, rgba(245, 158, 11, 0.4), transparent);
}

.planet--green .planet-card__sphere {
  background: radial-gradient(circle at 35% 35%, #86EFAC, #22C55E, #14532D);
  box-shadow: 0 0 40px rgba(34, 197, 94, 0.5), inset 0 -10px 20px rgba(0, 0, 0, 0.3);
}

.planet--green .planet-card__glow {
  background: radial-gradient(circle, rgba(34, 197, 94, 0.4), transparent);
}

/* 星球光环 */
.planet-card__ring {
  position: absolute;
  width: 180px;
  height: 40px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.15);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotateX(75deg);
  pointer-events: none;
}

/* 星球信息 */
.planet-card__name {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
  text-align: center;
}

.planet-card__progress-text {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--space-3);
}

.planet-card__stars {
  font-size: var(--font-size-lg);
  letter-spacing: 4px;
  color: var(--star-yellow);
  margin-bottom: var(--space-4);
}

/* 完成率进度条 */
.planet-card__progress {
  width: 100%;
  max-width: 180px;
}

/* ========================================
   关于系统区段
   ======================================== */
.about-section {
  padding: var(--space-16) var(--space-6);
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.about-section__title {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-6);
}

.about-section__features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-8);
}

.feature-item {
  padding: var(--space-6);
  text-align: center;
}

.feature-item__icon {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-4);
}

.feature-item__title {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-2);
}

.feature-item__text {
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
}