/* ============================================
   SkyCetus 2.0 — 首页样式
   三层呼吸 2.0：感受 → 选择 → 邀请
   ============================================ */

/* ── 第一屏：Hero — 感受 ── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.hero-cosmos {
  position: absolute;
  inset: 0;
  z-index: 0;
}

#starCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-nebula {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 15% 45%, rgba(139, 122, 212, 0.08), transparent 55%),
    radial-gradient(ellipse at 85% 55%, rgba(212, 175, 55, 0.06), transparent 55%),
    radial-gradient(ellipse at 50% 90%, rgba(78, 205, 196, 0.04), transparent 40%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 2rem;
}

/* Whisper — 渐入引言 */
.hero-whisper {
  margin-bottom: 3.5rem;
}

.whisper-line {
  font-family: var(--font-serif);
  font-size: clamp(0.95rem, 2.2vw, 1.25rem);
  color: var(--white-50);
  line-height: 2.2;
  opacity: 0;
  transform: translateY(12px);
  animation: whisperIn 1.2s var(--ease-out) forwards;
}

.whisper-line[data-delay="600"] { animation-delay: 0.6s; }

.whisper-highlight {
  font-family: var(--font-serif);
  font-size: clamp(1.15rem, 2.8vw, 1.55rem);
  color: var(--gold);
  margin-top: 0.5rem;
  opacity: 0;
  transform: translateY(12px);
  animation: whisperIn 1.2s var(--ease-out) forwards;
  animation-delay: 1.4s;
}

@keyframes whisperIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Title */
.hero-title {
  font-family: var(--font-serif);
  font-weight: 200;
  margin-bottom: 1.2rem;
  opacity: 0;
  animation: titleIn 1.5s var(--ease-out) forwards;
  animation-delay: 2s;
}

.title-main {
  font-size: clamp(2.2rem, 5.5vw, 4rem);
  background: linear-gradient(135deg, var(--white) 40%, var(--gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.title-divider {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  color: var(--white-15);
  margin: 0 0.75rem;
}

.title-en {
  font-size: clamp(1.5rem, 3.5vw, 2.5rem);
  color: var(--white-40);
  font-weight: 300;
}

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

.hero-subtitle {
  font-size: clamp(0.9rem, 1.8vw, 1.1rem);
  color: var(--white-50);
  margin-bottom: 0.5rem;
  opacity: 0;
  animation: whisperIn 1s var(--ease-out) forwards;
  animation-delay: 2.6s;
}

.hero-tagline {
  font-size: 0.82rem;
  color: var(--white-20);
  letter-spacing: 0.2em;
  opacity: 0;
  animation: whisperIn 1s var(--ease-out) forwards;
  animation-delay: 3s;
}

/* Scroll Hint */
.hero-scroll {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  opacity: 0;
  animation: whisperIn 1s var(--ease-out) forwards;
  animation-delay: 3.5s;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, transparent, var(--white-30), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.8); }
  50% { opacity: 1; transform: scaleY(1); }
}

.scroll-text {
  font-size: 0.7rem;
  color: var(--white-20);
  letter-spacing: 0.2em;
}

/* ── 阿赫低语 ── */
.aher-whisper-section {
  padding: 6rem 2rem;
  background: linear-gradient(180deg, var(--space-deep) 0%, var(--space) 50%, var(--space-deep) 100%);
  text-align: center;
}

.aher-text {
  font-family: var(--font-serif);
  font-size: clamp(1.15rem, 2.8vw, 1.7rem);
  color: var(--white-60);
  font-style: italic;
  margin-bottom: 1rem;
}

.aher-name {
  color: var(--gold);
  font-size: 0.85rem;
  letter-spacing: 0.12em;
}

/* ── 第二屏：四张卡片 ── */
.paths-section {
  padding: var(--section-padding) var(--container-padding);
  background: var(--bg-primary);
}

.paths-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.path-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 2.5rem 1.5rem;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  transition: all var(--t-base);
  text-decoration: none;
  cursor: pointer;
  overflow: hidden;
  backdrop-filter: blur(8px);
}

.path-glow {
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at center, var(--gold-glow), transparent 60%);
  opacity: 0;
  transition: opacity var(--t-slow);
  pointer-events: none;
}

.path-card:hover .path-glow { opacity: 1; }

.path-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
}

.path-card-highlight {
  border-color: var(--border-glow);
  background: rgba(212, 175, 55, 0.04);
}

.path-card-lobster {
  border-color: rgba(239, 68, 68, 0.2);
  background: rgba(239, 68, 68, 0.03);
}

.path-card-lobster:hover {
  border-color: rgba(239, 68, 68, 0.5);
  box-shadow: 0 0 40px rgba(239, 68, 68, 0.12);
}

.path-card-lobster .path-glow {
  background: radial-gradient(circle at center, rgba(239, 68, 68, 0.1), transparent 60%);
}

.path-icon {
  font-size: 2.2rem;
  color: var(--gold);
  margin-bottom: 0.75rem;
  position: relative;
}

.path-divider {
  width: 28px;
  height: 1px;
  background: var(--white-10);
  margin: 0.6rem 0;
}

.path-title {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--white);
  position: relative;
}

.path-desc {
  font-size: 0.85rem;
  color: var(--white-40);
  line-height: 1.7;
  position: relative;
}

.path-arrow {
  position: absolute;
  bottom: 1.25rem;
  right: 1.25rem;
  color: var(--white-15);
  font-size: 1.2rem;
  transition: all var(--t-base);
}

.path-card:hover .path-arrow {
  color: var(--gold);
  transform: translateX(4px);
}

/* ── 天鲸星系预览 ── */
.skycetus-preview {
  padding: var(--section-padding) var(--container-padding);
  background: linear-gradient(180deg, var(--space-deep) 0%, var(--space-dark) 50%, var(--space-deep) 100%);
}

.preview-container {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}

.preview-label {
  margin-bottom: 1rem;
}

.label-tag {
  font-size: 0.78rem;
  padding: 0.25rem 0.85rem;
}

.preview-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin: 3rem 0;
}

.preview-card {
  padding: 2rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  text-align: center;
  transition: all var(--t-base);
}

.preview-card:hover {
  border-color: var(--border-purple);
  box-shadow: var(--shadow-glow-purple);
}

.preview-icon {
  font-size: 2rem;
  display: block;
  margin-bottom: 1rem;
}

.preview-card h4 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 1.1rem;
  color: var(--white-90);
  margin-bottom: 0.75rem;
}

.preview-card p {
  font-size: 0.88rem;
  color: var(--white-40);
  line-height: 1.7;
}

.preview-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-top: 2.5rem;
}

/* ── 第三屏：邀请 ── */
.invite-section {
  padding: var(--section-padding) var(--container-padding);
  background: var(--bg-primary);
}

.invite-container {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.invite-badge {
  margin-bottom: 1.5rem;
}

.invite-title {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 300;
  color: var(--white);
  margin-bottom: 1rem;
}

.invite-desc {
  font-size: 0.95rem;
  color: var(--white-50);
  line-height: 1.9;
  margin-bottom: 3rem;
}

.invite-perks {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-bottom: 3rem;
  text-align: left;
}

.perk-item {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: all var(--t-base);
}

.perk-item:hover {
  border-color: var(--border-glow);
}

.perk-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
  margin-top: 0.15rem;
}

.perk-item h4 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 1rem;
  color: var(--gold);
  margin-bottom: 0.3rem;
}

.perk-item p {
  font-size: 0.85rem;
  color: var(--white-40);
  line-height: 1.6;
}

/* ── 底部祝福 ── */
.blessing-section {
  padding: 5rem 2rem;
  text-align: center;
  background: linear-gradient(180deg, var(--space-deep), var(--space-abyss));
}

.blessing-text {
  font-family: var(--font-serif);
  font-size: clamp(1.3rem, 3vw, 2rem);
  color: var(--gold);
  font-weight: 300;
  margin-bottom: 0.75rem;
  letter-spacing: 0.05em;
}

.blessing-sub {
  font-size: 0.88rem;
  color: var(--white-30);
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .paths-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .paths-grid {
    grid-template-columns: 1fr;
    max-width: 420px;
    margin: 0 auto;
  }

  .preview-grid {
    grid-template-columns: 1fr;
    max-width: 420px;
    margin: 2rem auto;
  }

  .hero-whisper { margin-bottom: 2.5rem; }

  .title-divider { display: none; }
  .title-en { display: block; margin-top: 0.5rem; }

  .preview-cta {
    flex-direction: column;
    align-items: center;
  }
}