:root {
  color-scheme: light;
  --bg: #f3f5f7;
  --paper: #ffffff;
  --ink: #17202a;
  --muted: #65717d;
  --line: #dce3ea;
  --brand: #121a22;
  --accent: #f0c34e;
  --teal: #168f8b;
  --red: #d94c38;
  --radius: 8px;
  --shadow: 0 12px 28px rgba(20, 30, 44, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Arial, "Microsoft YaHei", "PingFang SC", sans-serif;
  line-height: 1.55;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

.page {
  width: min(760px, 100%);
  min-height: 100vh;
  margin: 0 auto;
  background: var(--bg);
}

.top {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.top-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 58px;
  padding: 10px 16px;
}

.brand {
  display: flex;
  flex-direction: column;
  min-width: 110px;
}

.brand strong {
  font-size: 20px;
  line-height: 1;
  letter-spacing: 0;
}

.brand span {
  margin-top: 3px;
  color: var(--muted);
  font-size: 11px;
}

.nav {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 1px;
  scrollbar-width: none;
}

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

.nav a {
  flex: 0 0 auto;
  min-height: 34px;
  border-radius: 999px;
  padding: 7px 10px;
  color: #3b4652;
  font-size: 13px;
  white-space: nowrap;
}

.nav a.active {
  background: var(--brand);
  color: #fff;
}

.hero {
  padding: 22px 16px 16px;
  background: var(--brand);
  color: #fff;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
}

.hero h1 {
  margin: 0;
  font-size: 30px;
  line-height: 1.12;
  letter-spacing: 0;
}

.hero p {
  margin: 10px 0 0;
  color: #dbe4ec;
  font-size: 15px;
}

.hero-media {
  margin-top: 16px;
  overflow: hidden;
  border-radius: var(--radius);
  background: #24313d;
  aspect-ratio: 16 / 10;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 14px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 9px 13px;
  font-weight: 700;
  font-size: 14px;
}

.button.primary {
  background: var(--accent);
  color: #121212;
}

.button.dark {
  background: var(--brand);
  color: #fff;
}

.button.ghost {
  border-color: rgba(255, 255, 255, 0.4);
  color: #fff;
}

.content {
  padding: 16px;
}

.quick-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.quick {
  min-height: 84px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  padding: 13px;
  box-shadow: var(--shadow);
}

.quick strong {
  display: block;
  font-size: 15px;
}

.quick span {
  display: block;
  margin-top: 5px;
  color: var(--muted);
  font-size: 12px;
}

.section {
  margin-top: 22px;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.section-head h2 {
  margin: 0;
  font-size: 21px;
  letter-spacing: 0;
}

.section-head span {
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
}

.product-list {
  display: grid;
  gap: 10px;
}

.product-card {
  display: grid;
  grid-template-columns: 116px minmax(0, 1fr);
  min-height: 132px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.product-card.is-old {
  background: #fbfbfb;
}

.product-card img {
  width: 116px;
  height: 132px;
  object-fit: cover;
  background: #e9eef2;
}

.product-copy {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
  padding: 12px;
}

.product-copy h3 {
  margin: 0;
  font-size: 17px;
  line-height: 1.2;
  letter-spacing: 0;
}

.product-copy p {
  margin: 0;
  color: #3c4650;
  font-size: 13px;
}

.product-copy .support {
  color: var(--muted);
  font-size: 12px;
}

.tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: auto;
}

.tag {
  border-radius: 999px;
  background: #edf2f5;
  color: #46525e;
  padding: 3px 7px;
  font-size: 11px;
}

.detail-visual {
  margin-top: 16px;
  overflow: hidden;
  border-radius: var(--radius);
  background: #263340;
  aspect-ratio: 4 / 3;
}

.detail-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  padding: 15px;
  box-shadow: var(--shadow);
}

.panel + .panel {
  margin-top: 12px;
}

.panel h2 {
  margin: 0 0 10px;
  font-size: 19px;
  letter-spacing: 0;
}

.panel p {
  margin: 0;
  color: #3e4852;
  font-size: 14px;
}

.panel ul,
.panel ol {
  margin: 0;
  padding-left: 20px;
  color: #3e4852;
  font-size: 14px;
}

.panel li + li {
  margin-top: 7px;
}

.download-list {
  display: grid;
  gap: 10px;
}

.download-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  padding: 13px;
}

.download-item strong {
  display: block;
  font-size: 15px;
}

.download-item span {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
}

.download-item em {
  flex: 0 0 auto;
  border-radius: 999px;
  background: var(--brand);
  color: #fff;
  padding: 6px 9px;
  font-style: normal;
  font-size: 12px;
}

.notice {
  border-left: 4px solid var(--teal);
  background: #eef8f7;
}

.manual-body {
  overflow: hidden;
}

.manual-body dl {
  margin: 0;
}

.manual-body dt {
  margin-top: 18px;
}

.manual-body dt:first-child {
  margin-top: 0;
}

.manual-body h3 {
  margin: 0 0 8px;
  font-size: 18px;
  letter-spacing: 0;
}

.manual-body dd {
  margin: 8px 0 0;
  color: #3e4852;
  font-size: 14px;
}

.manual-body img {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  margin: 12px auto;
  border-radius: var(--radius);
}

.manual-body a {
  color: #0b6fbc;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.product-body {
  overflow: hidden;
}

.product-body h3,
.product-body h4 {
  margin: 16px 0 8px;
  letter-spacing: 0;
}

.product-body h3 {
  font-size: 19px;
}

.product-body h4 {
  font-size: 16px;
}

.product-body p,
.product-body dd,
.product-body td,
.product-body th {
  color: #3e4852;
  font-size: 14px;
}

.product-body dl,
.product-body p {
  margin: 8px 0;
}

.product-body img {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
  border-radius: var(--radius);
}

.product-body table {
  display: block;
  width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
  -webkit-overflow-scrolling: touch;
}

.product-body td,
.product-body th {
  border: 1px solid var(--line);
  padding: 8px;
}

.product-body a {
  color: #0b6fbc;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.footer {
  padding: 20px 16px 30px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  background: #fff;
  font-size: 12px;
  text-align: center;
}

@media (min-width: 680px) {
  .product-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 380px) {
  .product-card {
    grid-template-columns: 100px minmax(0, 1fr);
  }

  .product-card img {
    width: 100px;
  }

  .quick-grid {
    grid-template-columns: 1fr;
  }
}