/* ═══ 通用区块 ═══ */
.section {
  padding: 80px 28px;
  position: relative;
  max-width: 600px;
  margin: 0 auto;
}
.section-header { text-align: center; }
.section-label {
  font-size: 10px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 16px;
}
.section-title {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: 1px;
  line-height: 1.6;
  margin-bottom: 14px;
}
.section-subtitle {
  font-size: 15px;
  color: var(--text-secondary);
  font-weight: 300;
  line-height: 1.9;
}

/* ── 淡入动画（增强版见下方） ── */
.reveal-delay-1 { transition-delay: 0.15s; }
.reveal-delay-2 { transition-delay: 0.3s; }
.reveal-delay-3 { transition-delay: 0.45s; }

/* ═══ 宣言区 ═══ */
.manifesto { text-align: center; }
.manifesto-body {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 2.4;
  font-weight: 300;
  margin-top: 32px;
}
.manifesto-body span { display: block; }

/* ═══ 概念卡片 ═══ */
.concepts {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 32px;
}
.concept-card {
  padding: 28px 24px;
  transition: transform 0.6s cubic-bezier(0.16,1,0.3,1);
}
/* 微动效：进入视口时轻微上浮 + 透明度变化 */
.concept-card.reveal { transform: translateY(20px) scale(0.98); }
.concept-card.reveal.visible { transform: translateY(0) scale(1); }

.concept-num {
  font-size: 11px;
  color: var(--glow-warm);
  letter-spacing: 2px;
  margin-bottom: 12px;
  opacity: 0.7;
}
.concept-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 14px;
  letter-spacing: 1px;
}
.concept-text {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 2.1;
  font-weight: 300;
}

/* ═══ 场景区 ═══ */
.scenarios {
  overflow: visible;
  position: relative;
  max-width: 540px;
  margin: 0 auto;
  padding: 80px 0;
}
.scroll-arrow {
  position: absolute;
  top: 55%;
  transform: translateY(-50%);
  z-index: 5;
  font-size: 20px;
  color: var(--glow-warm);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
  text-shadow: 0 0 10px var(--glow-warm-50);
}
.scroll-arrow-left { left: 12px; }
.scroll-arrow-right { right: 12px; }
.scenarios:hover .scroll-arrow { opacity: 0.6; }

.scenario-stars {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}
.scenario-star {
  position: absolute;
  background: var(--glow-warm);
  border-radius: 50%;
  opacity: 0;
  animation: scenario-twinkle var(--dur) ease-in-out infinite;
}
@keyframes scenario-twinkle {
  0%,100%{opacity:0;transform:scale(0.3)}
  40%{opacity:0.9;transform:scale(1)}
  60%{opacity:0.7;transform:scale(0.8)}
}
.scenario-star.cross { background: none; width: 12px; height: 12px; }
.scenario-star.cross::before,.scenario-star.cross::after {
  content: '';
  position: absolute;
  background: rgba(245,200,122,0.6);
  border-radius: 1px;
}
.scenario-star.cross::before { width: 1px; height: 100%; left: 50%; top: 0; }
.scenario-star.cross::after { width: 100%; height: 1px; top: 50%; left: 0; }

.orbit-ring {
  position: absolute;
  width: 480px;
  height: 480px;
  top: 10%;
  left: 50%;
  border: 1px solid rgba(245,200,122,0.06);
  border-radius: 50%;
  pointer-events: none;
  animation: orbit-spin 80s linear infinite;
  z-index: 0;
}
.orbit-ring.paused { animation-play-state: paused; }
@keyframes orbit-spin { from{transform:translate(-50%,-50%) rotate(0deg)} to{transform:translate(-50%,-50%) rotate(360deg)} }
.orbit-dot {
  position: absolute;
  width: 4px; height: 4px;
  background: var(--glow-warm);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--glow-warm), 0 0 20px var(--glow-warm-30);
  top: -2px; left: 50%; margin-left: -2px;
}
.orbit-ring-2 {
  position: absolute;
  width: 320px;
  height: 320px;
  top: 20%;
  left: 50%;
  border: 1px dashed rgba(245,200,122,0.04);
  border-radius: 50%;
  pointer-events: none;
  animation: orbit-spin 120s linear infinite reverse;
  z-index: 0;
}
.orbit-ring-2.paused { animation-play-state: paused; }
.orbit-dot-2 {
  position: absolute;
  width: 3px; height: 3px;
  background: var(--glow-warm-50);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--glow-warm-40);
  top: -1px; left: 50%; margin-left: -1px;
}

.scenarios-track {
  display: flex;
  gap: 16px;
  overflow-x: scroll;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  margin-top: 28px;
  padding: 0 24px 20px;
  scrollbar-width: none;
  position: relative;
  z-index: 2;
  cursor: default;
  scroll-padding: 0 24px;
}
.scenarios-track::-webkit-scrollbar { display: none; }

.scenario-card {
  flex: 0 0 82vw;
  max-width: 340px;
  scroll-snap-align: center;
  padding: 32px 24px;
  min-height: 240px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}
.scenario-label {
  font-size: 10px;
  letter-spacing: 3px;
  color: var(--glow-warm);
  text-transform: uppercase;
  margin-bottom: 16px;
  opacity: 0.6;
}
.scenario-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 14px;
  letter-spacing: 1px;
}
.scenario-text {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 2.1;
  font-weight: 300;
}

/* ═══ 可复制系统 ═══ */
.system-intro {
  font-size: 15px;
  color: var(--text-secondary);
  font-weight: 300;
  line-height: 2.2;
  text-align: center;
  margin-top: 32px;
  margin-bottom: 36px;
}
.system-track {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding: 0 24px 20px;
  scrollbar-width: none;
}
.system-track::-webkit-scrollbar { display: none; }
.system-card {
  flex: 0 0 78vw;
  max-width: 320px;
  scroll-snap-align: center;
  padding: 28px 22px;
  min-height: 160px;
}
.system-num {
  font-size: 10px;
  color: var(--glow-warm);
  letter-spacing: 3px;
  margin-bottom: 14px;
  opacity: 0.6;
}
.system-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: 1px;
}
.system-text {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 2;
  font-weight: 300;
}

/* ═══ 时间轴 ═══ */
.timeline {
  max-width: 400px;
  margin: 40px auto 0;
  position: relative;
  padding-left: 32px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 6px; top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--glow-warm-30), transparent);
}
.tl-item { position: relative; padding-bottom: 48px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-dot {
  position: absolute;
  left: -32px; top: 4px;
  width: 13px; height: 13px;
  border-radius: 50%;
  border: 2px solid var(--glow-warm-40);
  background: var(--sky-deep);
  transition: all 0.6s ease;
}
.tl-item.visible .tl-dot {
  background: var(--glow-warm);
  border-color: var(--glow-warm);
  box-shadow: 0 0 12px var(--glow-warm-40);
}
.tl-year {
  font-size: 24px;
  font-weight: 600;
  color: var(--glow-warm);
  margin-bottom: 8px;
  opacity: 0;
  transform: translateX(-10px);
  transition: all 0.6s ease;
}
.tl-item.visible .tl-year { opacity: 1; transform: translateX(0); }
.tl-title { font-size: 14px; font-weight: 500; margin-bottom: 6px; }
.tl-desc { font-size: 12px; color: var(--text-secondary); font-weight: 300; line-height: 1.9; }

/* ═══ 滚动进度条 ═══ */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 100%;
  background: linear-gradient(90deg, var(--glow-warm), var(--glow-warm-glow));
  z-index: 99;
  pointer-events: none;
  transform: scaleX(0);
  transform-origin: left center;
  will-change: transform;
}

/* ═══ 结尾 ═══ */
.ending {
  text-align: center;
  max-width: 440px;
  margin: 0 auto;
  padding-bottom: 120px;
}
.ending-title {
  font-size: 18px;
  font-weight: 500;
  line-height: 1.9;
  margin-bottom: 20px;
}
.ending-body {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 300;
  margin-bottom: 40px;
}
.btn-outline {
  display: inline-block;
  padding: 12px 32px;
  margin: 6px 4px;
  background: transparent;
  border: 1px solid var(--glass-border);
  border-radius: 100px;
  color: var(--text-secondary);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  letter-spacing: 2px;
  transition: all 0.3s ease;
}
.btn-outline:hover,.btn-outline:active {
  border-color: var(--glow-warm);
  color: var(--glow-warm);
}
.btn-outline:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 4px;
  border-color: var(--glow-warm);
  color: var(--glow-warm);
}

/* ═══ 光点星座 ═══ */
.constellation-canvas {
  display: block;
  width: 100%;
  height: 180px;
  margin: 0 auto;
  opacity: 0.8;
}

/* ═══ 页脚 ═══ */
.footer {
  text-align: center;
  padding: 40px 24px calc(40px + var(--safe-bottom));
  border-top: 1px solid rgba(255,255,255,0.04);
}
.footer p { font-size: 11px; color: var(--text-dim); letter-spacing: 3px; }
.footer .non-profit {
  margin-top: 10px;
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: 1px;
  opacity: 0.5;
  line-height: 1.8;
  max-width: 360px;
}
.footer-contact {
  margin-top: 20px;
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 2px;
}
.footer-contact a {
  color: var(--glow-warm);
  text-decoration: none;
  opacity: 0.7;
  transition: opacity 0.3s;
}
.footer-contact a:hover { opacity: 1; }
.footer-partner {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.04);
}
.partner-label {
  font-size: 10px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 8px;
  opacity: 0.4;
}
.partner-placeholder {
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 2px;
  opacity: 0.3;
  font-style: italic;
}