:root {
  --c-bg: #f4f6fb;
  --c-surface: #ffffff;
  --c-border: #e5e9f2;
  --c-text: #1f2937;
  --c-text-soft: #6b7280;
  --c-text-mute: #9ca3af;
  --c-primary: #4f46e5;
  --c-walking: #22c55e;
  --c-cycling: #3b82f6;
  --c-driving: #ef4444;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, .08);
  --radius: 12px;
  --t-fast: 180ms cubic-bezier(.4, 0, .2, 1);
  --t-base: 320ms cubic-bezier(.4, 0, .2, 1);
  --t-slow: 600ms cubic-bezier(.4, 0, .2, 1);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--c-bg);
  color: var(--c-text);
  -webkit-font-smoothing: antialiased;
}

.page {
  max-width: 1240px;
  margin: 0 auto;
  padding: 32px 24px 48px;
}

.page-header h1 {
  margin: 0;
  font-size: 26px;
  font-weight: 600;
  letter-spacing: .5px;
}

.subtitle {
  margin: 6px 0 24px;
  color: var(--c-text-soft);
  font-size: 14px;
}

.page-footer {
  margin-top: 24px;
  text-align: center;
  color: var(--c-text-mute);
  font-size: 12px;
}

/* ===================== 组件容器 ===================== */
.route-compare {
  display: grid;
  grid-template-columns: 360px 1fr;
  grid-template-rows: auto 1fr;
  gap: 16px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow-md);
  min-height: 620px;
}

/* ===================== 输入栏 ===================== */
.rc-search {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: #f8fafc;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
}

.rc-search__group {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.rc-input {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: 8px;
  padding: 8px 10px;
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}

.rc-input:focus-within {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, .12);
}

.rc-input__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.rc-input__dot--start { background: #22c55e; }
.rc-input__dot--end   { background: #ef4444; }

.rc-input input {
  flex: 1;
  border: 0;
  outline: 0;
  font-size: 14px;
  color: var(--c-text);
  background: transparent;
  font-family: inherit;
}

.rc-search__swap {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  border: 1px solid var(--c-border);
  background: #fff;
  cursor: pointer;
  display: grid;
  place-items: center;
  color: var(--c-text-soft);
  transition: transform var(--t-base), color var(--t-fast), border-color var(--t-fast);
}

.rc-search__swap:hover {
  color: var(--c-primary);
  border-color: var(--c-primary);
}

.rc-search__swap.is-rotating {
  transform: rotate(180deg);
}

.rc-search__btn {
  height: 76px;
  padding: 0 22px;
  border-radius: 10px;
  border: 0;
  background: linear-gradient(135deg, #4f46e5, #7c3aed);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  letter-spacing: 1px;
  transition: filter var(--t-fast), transform var(--t-fast);
}

.rc-search__btn:hover { filter: brightness(1.08); }
.rc-search__btn:active { transform: translateY(1px); }

/* ===================== 左侧对比卡片 ===================== */
.rc-modes {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.rc-mode-card {
  position: relative;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 14px;
  cursor: pointer;
  background: #fff;
  overflow: hidden;
  transition:
    transform var(--t-base),
    box-shadow var(--t-base),
    border-color var(--t-base);
}

.rc-mode-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  background: var(--mode-color, var(--c-primary));
  transform: scaleY(.4);
  transform-origin: center;
  transition: transform var(--t-base);
}

.rc-mode-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--mode-color, var(--c-primary));
}

.rc-mode-card.is-active {
  border-color: var(--mode-color);
  box-shadow: 0 6px 18px rgba(15, 23, 42, .08);
  background: linear-gradient(135deg, color-mix(in srgb, var(--mode-color) 8%, #fff), #fff);
}

.rc-mode-card.is-active::before {
  transform: scaleY(1);
}

.rc-mode-card__head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.rc-mode-card__icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: color-mix(in srgb, var(--mode-color) 14%, #fff);
  color: var(--mode-color);
}

.rc-mode-card__icon svg { width: 18px; height: 18px; }

.rc-mode-card__name {
  font-size: 15px;
  font-weight: 600;
}

.rc-mode-card__badge {
  margin-left: auto;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--mode-color) 12%, #fff);
  color: var(--mode-color);
  font-weight: 600;
}

.rc-mode-card__stats {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
}

.rc-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.rc-stat__label {
  font-size: 11px;
  color: var(--c-text-mute);
}

.rc-stat__value {
  font-size: 15px;
  font-weight: 600;
  color: var(--c-text);
}

.rc-stat__value em {
  font-style: normal;
  font-size: 11px;
  color: var(--c-text-soft);
  font-weight: 400;
  margin-left: 2px;
}

/* ===================== 地图区域 ===================== */
.rc-map-wrap {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--c-border);
  background:
    radial-gradient(circle at 30% 20%, #eef2ff 0%, transparent 50%),
    radial-gradient(circle at 70% 80%, #fef2f2 0%, transparent 45%),
    #f8fafc;
}

.rc-map {
  width: 100%;
  height: 100%;
  display: block;
}

/* 地图网格背景 */
.rc-map .grid line {
  stroke: #e2e8f0;
  stroke-width: .5;
}

/* 装饰道路 */
.rc-map .road-bg {
  fill: none;
  stroke: #e5e7eb;
  stroke-width: 8;
  stroke-linecap: round;
  opacity: .8;
}

/* 路线路径 */
.rc-map .route {
  fill: none;
  stroke-width: 6;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0;
  transition: opacity var(--t-base), stroke-width var(--t-fast);
  pointer-events: none;
}

.rc-map .route.is-visible {
  opacity: .35;
  pointer-events: stroke;
}

.rc-map .route.is-active {
  opacity: 1;
  stroke-width: 7;
  filter: drop-shadow(0 2px 6px rgba(15, 23, 42, .15));
}

.rc-map .route-segment {
  fill: none;
  stroke-width: 8;
  stroke-linecap: round;
  cursor: pointer;
  opacity: 0;
  transition: opacity var(--t-base), stroke-width var(--t-fast);
  pointer-events: none;
}

.rc-map .route-segment.is-active {
  opacity: 0;
  pointer-events: stroke;
}

.rc-map .route-segment.is-active:hover {
  opacity: .25;
  stroke-width: 12;
}

.rc-map .route-segment.is-highlighted,
.rc-map .route-segment.is-active.is-highlighted,
.rc-map .route-segment.is-active.is-highlighted:hover {
  opacity: .5;
  stroke-width: 12;
}

/* 路径动画 */
.rc-map .route.is-drawing {
  stroke-dasharray: var(--len);
  stroke-dashoffset: var(--len);
  animation: drawRoute var(--t-slow) ease forwards;
}

@keyframes drawRoute {
  to { stroke-dashoffset: 0; }
}

/* 标记点 */
.rc-map .marker { transition: transform var(--t-base); }
.rc-map .marker__pin {
  filter: drop-shadow(0 3px 4px rgba(0, 0, 0, .25));
}

.rc-map .traffic-light {
  fill: #fff;
  stroke: #ef4444;
  stroke-width: 1.5;
  opacity: 0;
  transition: opacity var(--t-base);
}

.rc-map .traffic-light.is-visible { opacity: 1; }

/* 图例 */
.rc-legend {
  position: absolute;
  top: 14px;
  right: 14px;
  background: rgba(255, 255, 255, .94);
  backdrop-filter: blur(6px);
  border: 1px solid var(--c-border);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  box-shadow: var(--shadow-sm);
}

.rc-legend__item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--c-text-soft);
}

.rc-legend__line {
  width: 22px;
  height: 3px;
  border-radius: 2px;
}

.rc-legend__item.is-active {
  color: var(--c-text);
  font-weight: 600;
}

/* 左下角加载/状态浮层 */
.rc-status {
  position: absolute;
  left: 14px;
  bottom: 14px;
  background: rgba(255, 255, 255, .94);
  backdrop-filter: blur(6px);
  border: 1px solid var(--c-border);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 12px;
  color: var(--c-text-soft);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  gap: 8px;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--t-base), transform var(--t-base);
  pointer-events: none;
}

.rc-status.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.rc-status__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-primary);
  animation: pulse 1.4s infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.5); opacity: .5; }
}

/* ===================== 详情抽屉 ===================== */
.rc-detail {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 320px;
  background: #fff;
  border-left: 1px solid var(--c-border);
  box-shadow: -8px 0 24px rgba(15, 23, 42, .06);
  transform: translateX(100%);
  transition: transform var(--t-base);
  display: flex;
  flex-direction: column;
  z-index: 5;
}

.rc-detail.is-open { transform: translateX(0); }

.rc-detail__head {
  display: flex;
  align-items: center;
  padding: 14px 16px;
  border-bottom: 1px solid var(--c-border);
}

.rc-detail__title {
  flex: 1;
  font-size: 14px;
  font-weight: 600;
}

.rc-detail__close {
  border: 0;
  background: transparent;
  cursor: pointer;
  color: var(--c-text-mute);
  font-size: 18px;
  line-height: 1;
  padding: 4px;
}

.rc-detail__close:hover { color: var(--c-text); }

.rc-detail__list {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0;
}

.rc-step {
  position: relative;
  display: flex;
  gap: 12px;
  padding: 10px 16px;
  cursor: pointer;
  transition: background var(--t-fast);
}

.rc-step:hover { background: #f8fafc; }
.rc-step.is-active { background: color-mix(in srgb, var(--mode-color, var(--c-primary)) 8%, #fff); }

.rc-step__index {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--mode-color, var(--c-primary));
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 11px;
  font-weight: 600;
  flex-shrink: 0;
  margin-top: 1px;
}

.rc-step__body {
  flex: 1;
  font-size: 13px;
  line-height: 1.5;
}

.rc-step__action { color: var(--c-text); font-weight: 500; }
.rc-step__meta {
  margin-top: 3px;
  font-size: 11px;
  color: var(--c-text-mute);
  display: flex;
  gap: 10px;
}

.rc-step__meta span::before {
  content: '·';
  margin-right: 4px;
  color: var(--c-border);
}
.rc-step__meta span:first-child::before { content: none; }

/* 响应式 */
@media (max-width: 900px) {
  .route-compare {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto 480px;
  }
  .rc-detail { width: 100%; }
}