.timeline-section {
  position: relative;
  z-index: 1;
  margin-top: 60px;
}

.event-title {
  font-family: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", sans-serif;
}

.event-date {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 1.02rem;
  color: var(--muted);
  font-weight: 500;
}

.event-toggle {
  transition: transform 180ms ease, background-color 180ms ease, color 180ms ease,
    border-color 180ms ease, box-shadow 180ms ease, opacity 180ms ease;
}

.event-toggle:hover {
  transform: translateY(-1px);
}

.event-body {
  backdrop-filter: blur(14px);
  background: var(--bg-soft);
  border: 1px solid rgba(74, 52, 49, 0.08);
  box-shadow: var(--shadow);
  padding: 18px 18px 16px;
  border-radius: 24px;
  width: min(100%, 320px);
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.event-abstract,
.event-detail,
.event-meta {
  color: var(--muted);
  line-height: 1.75;
}

.timeline-topbar {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 16px;
  margin-bottom: 12px;
}

.timeline-status {
  text-align: right;
}

.timeline {
  position: relative;
  margin-top: 24px;
}

.roadmap-stop .event-body:hover,
.roadmap-stop .event-body:focus-within {
  transform: translateY(-1px);
  box-shadow: 0 20px 34px rgba(61, 42, 38, 0.12);
  border-color: rgba(143, 24, 33, 0.14);
}

.roadmap-stop-compact .event-body {
  width: min(100%, 250px);
  padding: 16px 18px;
  background: rgba(255, 252, 250, 0.92);
  cursor: pointer;
}

.roadmap-stop-compact .event-title {
  margin: 0;
  font-size: clamp(1.05rem, 2vw, 1.22rem);
  line-height: 1.35;
}

.roadmap-stop-compact .event-body:hover,
.roadmap-stop-compact .event-body:focus-visible {
  outline: none;
}

.event-title {
  margin: 8px 0 10px;
  font-size: clamp(1.35rem, 2.4vw, 1.8rem);
  line-height: 1.02;
}

.event-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 0;
}

.event-meta div {
  padding: 8px 10px;
  border-radius: 12px;
  border: 1px solid rgba(96, 73, 50, 0.1);
  background: rgba(255, 255, 255, 0.36);
}

.event-meta dt {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 4px;
}

.event-meta dd {
  margin: 0;
  color: var(--text);
  font-weight: 600;
}

.event-toggle {
  margin-top: 14px;
  border: 0;
  background: transparent;
  color: var(--accent-deep);
  font-weight: 700;
  padding: 0;
  cursor: pointer;
}

.empty-state {
  padding: 28px;
  border-radius: 24px;
  background: rgba(255, 252, 250, 0.86);
  border: 1px solid var(--ui-border);
  box-shadow: var(--ui-shadow);
}

.roadmap {
  display: grid;
  gap: 34px;
}

.roadmap.is-animated .roadmap-stop {
  opacity: 0;
  transform: translate3d(var(--reveal-shift, 0px), 28px, 0) scale(0.96);
  transition:
    opacity 520ms ease,
    transform 780ms cubic-bezier(0.2, 0.8, 0.2, 1),
    filter 520ms ease;
  transition-delay: var(--reveal-delay, 0ms);
  filter: saturate(0.92);
}

.roadmap.is-animated .roadmap-stop.is-visible {
  opacity: 1;
  transform: translate3d(calc(var(--reveal-shift, 0px) * 0.18), 8px, 0) scale(0.985);
}

.roadmap.is-animated .roadmap-stop.is-active {
  transform: translate3d(0, 0, 0) scale(1);
  filter: saturate(1);
}

.roadmap-row {
  position: relative;
  display: grid;
  grid-template-columns: repeat(var(--columns, 2), minmax(0, 1fr));
  gap: 28px;
  padding-top: 52px;
  --row-progress: 0;
  --connector-progress: 0;
}

.roadmap-row-label {
  position: absolute;
  top: 0;
  left: 6px;
  font-size: 0.84rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  background: rgba(255, 252, 250, 0.9);
  border: 1px solid var(--ui-border);
  border-radius: 999px;
  padding: 6px 12px;
  box-shadow: var(--ui-shadow);
}

.roadmap-row::before {
  content: "";
  position: absolute;
  left: 72px;
  right: 72px;
  top: 58px;
  height: 42px;
  border-radius: 999px;
  background: var(--road);
  box-shadow: inset 0 0 0 1px rgba(255, 245, 243, 0.08);
}

.roadmap-progress {
  position: absolute;
  top: 58px;
  left: 72px;
  right: 72px;
  height: 42px;
  border-radius: 999px;
  background:
    linear-gradient(90deg, rgba(255, 245, 243, 0.24), rgba(255, 245, 243, 0) 56%),
    linear-gradient(90deg, #da4d56 0%, #b3262e 55%, #8f1821 100%);
  box-shadow:
    inset 0 0 0 1px rgba(255, 245, 243, 0.12),
    0 10px 24px rgba(143, 24, 33, 0.18);
  opacity: calc(0.18 + (var(--row-progress) * 0.82));
  transform: scaleX(var(--row-progress));
  transform-origin: left center;
  transition: transform 120ms linear, opacity 180ms ease;
  pointer-events: none;
}

.roadmap-row.row-single {
  grid-template-columns: 1fr;
  justify-items: center;
}

.roadmap-row::after {
  content: "";
  position: absolute;
  left: 94px;
  right: 94px;
  top: 77px;
  height: 4px;
  border-radius: 999px;
  background:
    repeating-linear-gradient(
      90deg,
      var(--road-stripe) 0 26px,
      transparent 26px 46px
    );
  opacity: 0.88;
}

.roadmap-row.has-connector.connector-right .road-connector,
.roadmap-row.has-connector.connector-left .road-connector {
  position: absolute;
  top: 58px;
  width: 94px;
  height: calc(100% + 34px);
  border: 42px solid var(--road);
  border-left-width: 42px;
  border-right-width: 42px;
  border-radius: 999px;
  box-sizing: border-box;
}

.roadmap-row.has-connector.connector-right .road-connector-progress,
.roadmap-row.has-connector.connector-left .road-connector-progress {
  position: absolute;
  top: 58px;
  width: 94px;
  height: calc(100% + 34px);
  border: 42px solid #c93f48;
  border-left-width: 42px;
  border-right-width: 42px;
  border-radius: 999px;
  box-sizing: border-box;
  opacity: calc(0.12 + (var(--connector-progress) * 0.86));
  transform: scaleY(var(--connector-progress));
  transform-origin: top center;
  transition: transform 120ms linear, opacity 180ms ease;
  pointer-events: none;
  filter: drop-shadow(0 8px 16px rgba(143, 24, 33, 0.14));
}

.roadmap-row.has-connector.connector-right .road-connector {
  right: -21px;
  border-left-color: transparent;
}

.roadmap-row.has-connector.connector-right .road-connector-progress {
  right: -21px;
  border-left-color: transparent;
}

.roadmap-row.has-connector.connector-left .road-connector {
  left: -21px;
  border-right-color: transparent;
}

.roadmap-row.has-connector.connector-left .road-connector-progress {
  left: -21px;
  border-right-color: transparent;
}

.roadmap-stop {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 2px;
  will-change: transform, opacity;
}

.roadmap-node {
  position: relative;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #d94952 0%, #9f1f29 100%);
  box-shadow: 0 14px 30px rgba(143, 24, 33, 0.28);
  animation: nodePulse 2.4s ease-in-out infinite;
  transition: transform 360ms ease, box-shadow 360ms ease, filter 360ms ease;
}

.roadmap-node::before {
  content: "";
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(255, 242, 237, 0.96);
}

.roadmap-node::after {
  content: "";
  position: absolute;
  top: 56px;
  left: 50%;
  width: 2px;
  height: 26px;
  transform: translateX(-50%);
  background: rgba(179, 38, 46, 0.56);
}

.roadmap-node-ring {
  position: absolute;
  inset: -12px;
  border-radius: 50%;
  border: 3px solid rgba(217, 73, 82, 0.4);
  animation: nodeHalo 2.4s ease-out infinite;
  transition: opacity 280ms ease, border-color 280ms ease;
}

.roadmap.is-animated .roadmap-node {
  animation: none;
  transform: scale(0.88);
  box-shadow: 0 10px 20px rgba(143, 24, 33, 0.16);
  filter: saturate(0.86);
}

.roadmap.is-animated .roadmap-stop.is-visible .roadmap-node {
  transform: scale(0.98);
}

.roadmap.is-animated .roadmap-stop.is-active .roadmap-node {
  transform: scale(1.08);
  box-shadow: 0 18px 40px rgba(143, 24, 33, 0.3);
  filter: saturate(1);
}

.roadmap.is-animated .roadmap-node-ring {
  opacity: 0.22;
}

.roadmap.is-animated .roadmap-stop.is-active .roadmap-node-ring {
  opacity: 1;
  border-color: rgba(217, 73, 82, 0.56);
  animation: nodeHalo 1.8s ease-out infinite;
}

.roadmap.is-animated .roadmap-stop .event-body {
  box-shadow: 0 14px 28px rgba(61, 42, 38, 0.08);
}

.roadmap.is-animated .roadmap-stop.is-active .event-body {
  box-shadow: 0 22px 38px rgba(61, 42, 38, 0.14);
}

@keyframes nodePulse {
  0%,
  100% {
    transform: scale(1);
    box-shadow: 0 14px 30px rgba(143, 24, 33, 0.28);
  }

  35% {
    transform: scale(1.06);
    box-shadow: 0 18px 36px rgba(143, 24, 33, 0.34);
  }

  55% {
    transform: scale(0.98);
    box-shadow: 0 12px 24px rgba(143, 24, 33, 0.24);
  }
}

@keyframes nodeHalo {
  0% {
    transform: scale(0.94);
    opacity: 0.62;
  }

  60% {
    transform: scale(1.22);
    opacity: 0.16;
  }

  100% {
    transform: scale(1.32);
    opacity: 0;
  }
}

.roadmap-stop .event-body {
  margin-top: 26px;
}

.roadmap-spacer {
  visibility: hidden;
}

@media (max-width: 900px) {
  .timeline-topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .roadmap-row::before {
    left: 42px;
    right: 42px;
  }

  .roadmap-row::after {
    left: 62px;
    right: 62px;
  }
}

@media (max-width: 640px) {
  .event-toggle {
    font-size: 1rem;
  }

  .timeline-status {
    text-align: left;
  }

  .roadmap-row {
    grid-template-columns: 1fr;
    gap: 22px;
    padding-top: 0;
  }

  .roadmap-row-label {
    position: static;
    margin-bottom: 6px;
    width: fit-content;
  }

  .roadmap-row::before,
  .roadmap-row::after,
  .road-connector,
  .roadmap-progress,
  .road-connector-progress {
    display: none;
  }

  .roadmap-stop {
    align-items: stretch;
  }

  .roadmap-stop .event-body,
  .empty-state {
    width: 100%;
    margin-top: 18px;
    padding: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .roadmap-stop,
  .roadmap-node,
  .roadmap-node-ring,
  .roadmap-progress,
  .road-connector-progress,
  .event-body {
    animation: none !important;
    transition: none !important;
  }
}