.page-products {
  /* 页面专属变量 */
  --prod-bg: var(--c-bg);
  --prod-ink: var(--c-ink);
  --prod-red: var(--c-red);
  --prod-red-deep: #A22E20;
  --prod-blue: var(--c-blue);
  --prod-gold: var(--c-gold);
  --prod-paper: var(--c-paper);
  --prod-green: var(--c-green);
  --prod-warn: var(--c-warn);
  --prod-gray: var(--c-gray);
  --prod-line-soft: rgba(30, 30, 30, .18);
  --prod-line-strong: rgba(30, 30, 30, .42);
  --prod-shadow: 0 8px 0 rgba(31, 58, 95, .14), 0 24px 48px rgba(30, 30, 30, .12);
  --prod-font-title: var(--font-title);
  --prod-font-body: var(--font-body);
}

/* ===== 产品封面首屏 ===== */
.product-cover {
  background: var(--prod-red);
  color: #fff;
  padding: 24px 20px 48px;
  position: relative;
  overflow: hidden;
}
.product-cover::after {
  content: "";
  position: absolute;
  right: -80px;
  bottom: -80px;
  width: 280px;
  height: 280px;
  background: rgba(249, 245, 240, .08);
  border-radius: 50%;
  pointer-events: none;
}
.product-cover::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 10px;
  background: linear-gradient(90deg, var(--prod-gold) 0% 60%, #fff 60% 100%);
}
.cover-copy {
  position: relative;
  z-index: 2;
}
.cover-kicker {
  display: inline-block;
  font-family: var(--prod-font-body);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  padding: 6px 12px;
  border: 1px solid rgba(255,255,255,.7);
  border-radius: 2px;
  margin-bottom: 20px;
  text-transform: uppercase;
}
.product-cover h1 {
  font-family: var(--prod-font-title);
  font-size: clamp(28px, 7vw, 56px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: .01em;
  margin: 0 0 16px;
  color: #fff;
}
.cover-lead {
  font-family: var(--prod-font-body);
  font-size: 16px;
  line-height: 1.7;
  max-width: 520px;
  margin: 0 0 24px;
  color: rgba(255,255,255,.92);
}
.cover-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}
.cover-actions .btn--ghost {
  border: 1px solid rgba(255,255,255,.7);
}
.cover-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 32px;
  margin: 0;
  padding: 20px 0 0;
  border-top: 1px solid rgba(255,255,255,.25);
}
.cover-facts div {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.cover-facts dt {
  font-size: 12px;
  opacity: .7;
}
.cover-facts dd {
  font-family: var(--prod-font-title);
  font-size: 20px;
  font-weight: 800;
  margin: 0;
}
.cover-visual {
  position: relative;
  max-width: 320px;
  margin: 36px auto 0;
}
.phone-frame {
  position: relative;
  border-radius: 24px;
  background: #0F0F0F;
  padding: 12px;
  border: 2px solid rgba(255,255,255,.4);
  box-shadow: var(--prod-shadow);
  overflow: hidden;
}
.phone-frame::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 24px;
  background: #0F0F0F;
  border-radius: 0 0 16px 16px;
  z-index: 2;
}
.cover-phone-img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 16px;
  object-fit: cover;
}
.phone-glint {
  position: absolute;
  top: 8px;
  left: 8px;
  width: 24%;
  height: 32%;
  background: linear-gradient(135deg, rgba(255,255,255,.14) 0%, transparent 60%);
  border-radius: 12px;
  pointer-events: none;
}
.cover-stamp {
  position: absolute;
  bottom: 30px;
  left: -16px;
  width: 88px;
  height: 88px;
  border-radius: 50%;
  background: #fff;
  color: var(--prod-red);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 4px solid var(--prod-red);
  box-shadow: 4px 4px 0 rgba(0,0,0,.2);
  transform: rotate(-12deg);
}
.cover-stamp span {
  font-family: var(--prod-font-title);
  font-size: 24px;
  font-weight: 900;
  line-height: 1;
}
.cover-stamp small {
  font-size: 10px;
  font-weight: 700;
  margin-top: 2px;
}

/* ===== 通用章节 ===== */
.section {
  padding: 56px 20px;
}
.section-head {
  margin-bottom: 32px;
}
.section-no {
  font-family: var(--prod-font-title);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .12em;
  color: var(--prod-red);
  margin: 0 0 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.section-no::before {
  content: "";
  width: 32px;
  height: 4px;
  background: var(--prod-red);
  display: inline-block;
}
.section-no--light {
  color: #fff;
}
.section-no--light::before {
  background: var(--prod-gold);
}
.section-title {
  font-family: var(--prod-font-title);
  font-size: 26px;
  font-weight: 900;
  line-height: 1.2;
  margin: 0 0 12px;
  color: var(--prod-ink);
}
.section-desc {
  font-family: var(--prod-font-body);
  font-size: 15px;
  line-height: 1.7;
  color: var(--prod-gray);
  margin: 0;
  max-width: 480px;
}

/* ===== 核心功能网格 ===== */
.feature-section {
  background: var(--prod-bg);
}
.feature-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
.feature-card {
  background: var(--prod-paper);
  border: 2px solid var(--prod-ink);
  box-shadow: 0 6px 0 rgba(31,58,95,.12);
  padding: 20px;
  position: relative;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.feature-card[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}
.feature-card[data-reveal][data-in] {
  opacity: 1;
  transform: none;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 0 rgba(31,58,95,.14), 0 28px 48px rgba(30,30,30,.14);
}
.feature-card--lineup {
  border-top: 6px solid var(--prod-red);
}
.feature-card--injuries {
  border-top: 6px solid var(--prod-warn);
}
.feature-card--rank {
  border-top: 6px solid var(--prod-green);
}
.feature-card--extra {
  border-top: 6px solid var(--prod-blue);
}
.feature-card-top {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 16px;
}
.feature-index {
  font-family: var(--prod-font-title);
  font-size: 36px;
  font-weight: 900;
  line-height: 1;
  color: var(--prod-red);
  border: 2px solid var(--prod-red);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: #fff;
}
.feature-card--injuries .feature-index { color: var(--prod-warn); border-color: var(--prod-warn); }
.feature-card--rank .feature-index { color: var(--prod-green); border-color: var(--prod-green); }
.feature-card--extra .feature-index { color: var(--prod-blue); border-color: var(--prod-blue); }
.feature-card h3 {
  font-family: var(--prod-font-title);
  font-size: 20px;
  font-weight: 800;
  margin: 0 0 4px;
  color: var(--prod-ink);
}
.feature-tagline {
  font-size: 13px;
  color: var(--prod-gray);
  margin: 0;
  line-height: 1.5;
}
.feature-media {
  margin: 0 -20px 16px;
  overflow: hidden;
}
.feature-media img {
  width: 100%;
  height: auto;
  max-height: 320px;
  object-fit: cover;
  display: block;
}
.feature-media--wide img {
  max-height: 240px;
}
.feature-foot {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}
.feature-detail {
  flex-basis: 100%;
  font-size: 14px;
  line-height: 1.65;
  color: var(--prod-ink);
  margin: 12px 0 0;
  padding-left: 10px;
  border-left: 3px solid var(--prod-red);
}
.feature-list {
  list-style: none;
  margin: 0 0 12px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.feature-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 500;
}
.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
}
.dot--red { background: var(--prod-red); }
.dot--warn { background: var(--prod-warn); }
.dot--green { background: var(--prod-green); }
.rank-bars {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 4px;
}
.rank-bars span {
  position: relative;
  font-size: 13px;
  font-weight: 700;
  padding: 8px 12px;
  background: var(--prod-blue);
  color: #fff;
  border-radius: 2px;
  width: var(--bar-w, 80%);
  box-shadow: 2px 2px 0 rgba(30,30,30,.2);
}
.rank-bars span:nth-child(2) { background: var(--prod-green); }
.rank-bars span:nth-child(3) { background: var(--prod-gold); }
.extra-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 16px;
}
.extra-item {
  background: #fff;
  border: 1px solid var(--prod-line-strong);
  padding: 14px 8px;
  text-align: center;
}
.extra-num {
  font-family: var(--prod-font-title);
  font-size: 24px;
  font-weight: 900;
  color: var(--prod-red);
  display: block;
}
.extra-label {
  font-size: 12px;
  color: var(--prod-gray);
}

/* ===== 下载区块 ===== */
.download-section {
  background: var(--prod-blue);
  padding: 28px 20px 56px;
}
.download-frame {
  max-width: 1100px;
  margin: 0 auto;
}
.download-section .section-no {
  color: var(--prod-gold);
}
.download-title {
  font-family: var(--prod-font-title);
  font-size: 26px;
  font-weight: 900;
  color: #fff;
  margin: 0 0 16px;
  line-height: 1.2;
}
.download-desc {
  font-size: 15px;
  line-height: 1.7;
  color: rgba(255,255,255,.85);
  margin: 0 0 24px;
  max-width: 460px;
}
.download-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 0 0 24px;
}
.download-meta div {
  background: rgba(255,255,255,.08);
  padding: 12px 14px;
  border-left: 3px solid var(--prod-gold);
}
.download-meta dt {
  font-size: 11px;
  opacity: .6;
  margin: 0 0 4px;
}
.download-meta dd {
  font-size: 15px;
  font-weight: 700;
  margin: 0;
  color: #fff;
}
.store-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.store-badges .btn {
  color: #fff;
  background: transparent;
  border-color: rgba(255,255,255,.7);
}
.store-badges .btn:hover {
  background: rgba(255,255,255,.1);
}
.store-icon {
  display: inline-block;
  margin-right: 6px;
  font-size: 14px;
}
.store-icon--android {
  font-size: 10px;
}
.qr-wrap {
  margin-top: 36px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.qr-card {
  background: #fff;
  padding: 18px;
  border: 2px solid var(--prod-ink);
  box-shadow: 8px 8px 0 rgba(0,0,0,.22);
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  position: relative;
  max-width: 240px;
  width: 100%;
}
.qr-card img {
  width: 100%;
  height: auto;
  display: block;
}
.qr-note {
  font-size: 14px;
  font-weight: 700;
  color: var(--prod-ink);
  margin: 0;
}
.qr-tip {
  font-size: 13px;
  line-height: 1.6;
  color: rgba(255,255,255,.75);
  margin: 16px 0 0;
  max-width: 360px;
}
.qr-tip a {
  color: var(--prod-gold);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ===== 版本时间线 ===== */
.version-section {
  background: var(--prod-bg);
}
.timeline-scroll {
  margin: 0 -20px;
  padding: 8px 20px 24px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.version-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 16px;
  min-width: max-content;
  position: relative;
}
.version-timeline::before {
  content: "";
  position: absolute;
  top: 20px;
  left: 12px;
  right: 12px;
  height: 4px;
  background: linear-gradient(90deg, var(--prod-gold), var(--prod-red), var(--prod-blue));
  border-radius: 2px;
}
.timeline-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  position: relative;
  width: 160px;
  flex-shrink: 0;
}
.timeline-point {
  font-family: var(--prod-font-title);
  font-size: 13px;
  font-weight: 900;
  background: #fff;
  border: 3px solid var(--prod-blue);
  color: var(--prod-blue);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
  z-index: 1;
  box-shadow: 2px 2px 0 rgba(30,30,30,.2);
}
.timeline-point--current {
  border-color: var(--prod-red);
  background: var(--prod-red);
  color: #fff;
  box-shadow: 2px 2px 0 rgba(0,0,0,.3);
}
.version-card {
  background: var(--prod-paper);
  border: 2px solid var(--prod-ink);
  box-shadow: 0 4px 0 rgba(31,58,95,.1);
  padding: 14px;
  width: 100%;
}
.version-card h3 {
  font-family: var(--prod-font-title);
  font-size: 18px;
  font-weight: 800;
  margin: 0 0 4px;
}
.version-card p {
  font-size: 13px;
  color: var(--prod-gray);
  margin: 0 0 8px;
  line-height: 1.4;
}
.timeline-toggle {
  font-size: 12px;
  font-weight: 700;
  color: var(--prod-red);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.changelog-panels {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.changelog {
  background: #fff;
  border: 2px solid var(--prod-line-strong);
  box-shadow: 0 4px 0 rgba(31,58,95,.08);
}
.changelog summary {
  font-family: var(--prod-font-title);
  font-weight: 700;
  font-size: 15px;
  padding: 14px 16px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}
.changelog summary::after {
  content: "+";
  font-size: 20px;
  color: var(--prod-red);
  transition: transform .3s var(--ease);
}
.changelog[open] summary::after {
  transform: rotate(45deg);
}
.changelog ul {
  margin: 0;
  padding: 0 40px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.changelog li {
  font-size: 14px;
  line-height: 1.5;
  color: var(--prod-ink);
  position: relative;
  padding-left: 16px;
}
.changelog li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  background: var(--prod-red);
  border-radius: 1px;
}

/* ===== 使用指南 ===== */
.guide-section {
  background: var(--prod-paper);
}
.guide-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.guide-step {
  background: #fff;
  border: 2px solid var(--prod-ink);
  padding: 22px;
  position: relative;
  box-shadow: 0 6px 0 rgba(31,58,95,.1);
}
.guide-step[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}
.guide-step[data-reveal][data-in] {
  opacity: 1;
  transform: none;
}
.guide-step::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 6px;
  height: 100%;
}
.step--one::before { background: var(--prod-red); }
.step--two::before { background: var(--prod-gold); }
.step--three::before { background: var(--prod-green); }
.guide-num {
  font-family: var(--prod-font-title);
  font-size: 42px;
  font-weight: 900;
  line-height: 1;
  display: block;
  margin-bottom: 10px;
}
.step--one .guide-num { color: var(--prod-red); }
.step--two .guide-num { color: var(--prod-gold); }
.step--three .guide-num { color: var(--prod-green); }
.guide-step h3 {
  font-family: var(--prod-font-title);
  font-size: 20px;
  font-weight: 800;
  margin: 0 0 10px;
}
.guide-step p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--prod-gray);
  margin: 0 0 16px;
}
.guide-step .btn {
  font-size: 13px;
}
.guide-note {
  display: flex;
  gap: 12px;
  margin-top: 28px;
  padding: 18px;
  background: var(--prod-blue);
  color: rgba(255,255,255,.92);
  border-left: 6px solid var(--prod-gold);
}
.guide-note .tag {
  flex-shrink: 0;
  align-self: flex-start;
}
.guide-note p {
  font-size: 14px;
  line-height: 1.7;
  margin: 0;
}

/* ===== 响应式 ===== */
@media (min-width: 768px) {
  .product-cover {
    padding: 48px 40px 72px;
  }
  .product-cover .cover-copy {
    max-width: 680px;
  }
  .product-cover h1 {
    font-size: 44px;
  }
  .cover-facts {
    gap: 20px 48px;
  }
  .cover-visual {
    max-width: 340px;
    margin-top: 48px;
  }
  .section {
    padding: 72px 40px;
  }
  .section-head.split {
    display: grid;
    grid-template-columns: 1.2fr .8fr;
    gap: 32px;
    align-items: end;
  }
  .section-title {
    font-size: 32px;
  }
  .section-desc {
    font-size: 15px;
  }
  .feature-layout {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }
  .feature-card--lineup {
    grid-column: 1 / -1;
  }
  .feature-card--lineup .feature-media {
    max-width: 500px;
    margin: 0 auto 16px;
  }
  .feature-card--rank {
    grid-column: 1 / -1;
  }
  .download-frame {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 48px;
    align-items: center;
  }
  .qr-wrap {
    margin-top: 0;
  }
  .guide-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
  .guide-note {
    padding: 24px;
  }
  .changelog-panels {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .changelog:first-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1024px) {
  .product-cover {
    display: grid;
    grid-template-columns: 1.1fr .9fr;
    gap: 40px;
    align-items: center;
    padding: 64px 72px 96px;
  }
  .product-cover h1 {
    font-size: 56px;
  }
  .cover-lead {
    font-size: 17px;
    max-width: 540px;
  }
  .cover-visual {
    max-width: 360px;
    margin: 0 auto;
  }
  .phone-frame {
    transform: rotate(2.5deg) translateY(-8px);
  }
  .section {
    padding: 88px 72px;
  }
  .section-head {
    margin-bottom: 40px;
  }
  .section-head.split {
    grid-template-columns: 1.2fr 1fr;
  }
  .section-title {
    font-size: 36px;
  }
  .feature-layout {
    grid-template-columns: repeat(12, 1fr);
    gap: 28px;
  }
  .feature-card--lineup {
    grid-column: span 7;
  }
  .feature-card--injuries {
    grid-column: span 5;
  }
  .feature-card--rank {
    grid-column: span 5;
  }
  .feature-card--extra {
    grid-column: span 7;
  }
  .feature-card--rank .feature-media {
    max-height: 260px;
  }
  .download-frame {
    grid-template-columns: 1.2fr .8fr;
  }
  .download-title {
    font-size: 32px;
  }
  .timeline-scroll {
    margin: 0 -72px;
    padding: 8px 72px 24px;
  }
  .guide-grid {
    gap: 28px;
  }
  .guide-step {
    padding: 28px;
  }
  .guide-note {
    justify-content: center;
  }
}

.page-products {
  --bar-w: 1rem;
}