/* 运动页样式 */
.page-hero {
  padding: 60px 0 0;
}

.page-hero h1 {
  font-family: var(--serif);
  font-size: clamp(32px, 4.6vw, 50px);
  line-height: 1.18;
  margin-top: 16px;
}

.page-hero .lead {
  margin-top: 18px;
  font-size: 16px;
  color: var(--ink-2);
  max-width: 56ch;
}

.page-hero-meta {
  display: flex;
  gap: 28px;
  margin-top: 30px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--ink-3);
}

.page-hero-meta strong {
  color: var(--ink);
  font-family: var(--serif);
  font-size: 20px;
  margin-right: 4px;
}

/* 分区导航 */
.section-nav {
  position: sticky;
  top: 68px;
  z-index: 30;
  margin-top: 44px;
  background: rgba(247, 243, 236, .92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.section-nav-inner {
  display: flex;
  gap: 6px;
  padding: 12px 0;
  overflow-x: auto;
  scrollbar-width: none;
}

.section-nav-inner::-webkit-scrollbar { display: none; }

.section-nav a {
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 13.5px;
  color: var(--ink-2);
  border: 1px solid transparent;
  white-space: nowrap;
  transition: background .18s ease, color .18s ease, border-color .18s ease;
}

.section-nav a:hover { background: var(--brand-soft); color: var(--brand-ink); }

.section-nav a.is-active {
  background: var(--surface);
  border-color: var(--line-strong);
  color: var(--ink);
  font-weight: 600;
}

/* 页面区块 */
.block {
  padding: 72px 0 0;
  scroll-margin-top: 128px;
}

/* 筛选条 */
.filters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 26px;
}

.chip {
  padding: 7px 15px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  font-size: 13.5px;
  color: var(--ink-2);
  cursor: pointer;
  transition: all .18s ease;
}

.chip:hover { border-color: var(--ink-3); color: var(--ink); }

.chip[aria-pressed="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
  font-weight: 600;
}

.chip .num {
  opacity: .6;
  font-size: 12px;
  margin-left: 3px;
}

/* 运动卡片网格 */
.motion-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 18px;
}

.motion-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform .2s cubic-bezier(.22,.61,.36,1), box-shadow .2s ease, border-color .2s ease;
  animation: card-in .34s cubic-bezier(.22, .61, .36, 1) both;
}

@keyframes card-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

.motion-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--line-strong);
}

.motion-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
}

.motion-card h3 {
  font-family: var(--serif);
  font-size: 21px;
}

.motion-zh { font-size: 12px; color: var(--ink-3); }

.motion-intro {
  font-size: 13.5px;
  color: var(--ink-2);
  line-height: 1.68;
  flex: 1;
}

.motion-facts {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 12px;
  color: var(--ink-3);
}

.motion-facts span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.motion-facts svg { width: 13px; height: 13px; opacity: .65; }

.motion-detail {
  margin-top: 2px;
  font-size: 13px;
  color: var(--ink-2);
  display: none;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}

.motion-card.is-open .motion-detail { display: block; }

.motion-detail h4 {
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 6px;
  font-weight: 600;
}

.motion-detail ul {
  margin: 0 0 12px;
  padding-left: 17px;
}

.motion-detail li { margin-bottom: 5px; line-height: 1.6; }

.muscle-row { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 2px; }

.muscle-row span {
  font-size: 11.5px;
  padding: 2px 8px;
  border-radius: 6px;
  background: var(--green-soft);
  color: #3d6540;
}

.card-toggle {
  align-self: flex-start;
  background: none;
  border: 0;
  padding: 0;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--brand-ink);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.card-toggle svg {
  width: 13px;
  height: 13px;
  transition: transform .2s ease;
}

.motion-card.is-open .card-toggle svg { transform: rotate(180deg); }

/* 热量估算器 */
.calc {
  margin-top: 30px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: linear-gradient(150deg, #fffdf8, #fbf6ec);
  padding: 30px 32px;
  box-shadow: var(--shadow-sm);
}

.calc-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.2fr);
  gap: 18px;
  margin-top: 20px;
  align-items: end;
}

.field { display: flex; flex-direction: column; gap: 7px; }

.field label {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink-2);
}

.field input,
.field select {
  width: 100%;
  padding: 11px 13px;
  border-radius: 10px;
  border: 1px solid var(--line-strong);
  background: #fff;
  font-size: 14.5px;
  font-family: inherit;
  color: var(--ink);
  transition: border-color .18s ease, box-shadow .18s ease;
}

.field input:focus,
.field select:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(185, 86, 60, .12);
}

.calc-result {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 11px 16px;
  border-radius: 10px;
  background: var(--ink);
  color: #fff;
  min-height: 46px;
}

.calc-result .big {
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
}

.calc-result .unit { font-size: 12.5px; opacity: .72; }
.calc-result .note { font-size: 12px; opacity: .7; margin-left: auto; }

.calc-hint {
  margin-top: 14px;
  font-size: 12.5px;
  color: var(--ink-3);
}

/* 器材 */
.equip-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.equip-card {
  padding: 22px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
  display: flex;
  flex-direction: column;
  gap: 10px;
  animation: card-in .34s cubic-bezier(.22, .61, .36, 1) both;
}

.equip-card:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.equip-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.equip-card h3 {
  font-family: var(--serif);
  font-size: 19px;
}

.equip-price {
  font-size: 12.5px;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
}

.equip-intro {
  font-size: 13.5px;
  color: var(--ink-2);
  line-height: 1.68;
  flex: 1;
}

.equip-use {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  font-size: 11.5px;
}

.equip-use span {
  padding: 2px 8px;
  border-radius: 6px;
  background: var(--gold-soft);
  color: #8a6420;
}

.equip-suggest {
  font-size: 12.5px;
  color: var(--ink-2);
  padding-top: 10px;
  border-top: 1px dashed var(--line);
}

.equip-suggest b { color: var(--ink); font-weight: 600; }

/* 安全提示 */
.safety {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.safety-card {
  padding: 22px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--surface);
}

.safety-card .idx {
  font-family: var(--serif);
  font-size: 13px;
  color: var(--brand);
  font-weight: 700;
  letter-spacing: .1em;
}

.safety-card h3 {
  font-size: 15.5px;
  margin: 8px 0 6px;
}

.safety-card p {
  font-size: 13px;
  color: var(--ink-2);
  line-height: 1.66;
}

/* 空状态 */
.empty-state {
  padding: 48px;
  text-align: center;
  color: var(--ink-3);
  font-size: 14px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
}

@media (max-width: 980px) {
  .calc-grid { grid-template-columns: 1fr 1fr; }
  .calc-grid .field:last-of-type { grid-column: 1 / -1; }
  .safety { grid-template-columns: 1fr; }
}

@media (max-width: 820px) {
  .section-nav { top: 60px; }
  .block { padding-top: 52px; scroll-margin-top: 116px; }
  .calc { padding: 24px 20px; }
  .calc-grid { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  .motion-grid, .equip-grid { grid-template-columns: 1fr; }
}