:root {
  color-scheme: light;
  --ink: #171a1f;
  --muted: #616a73;
  --line: #d9dee3;
  --paper: #f8faf9;
  --panel: #ffffff;
  --graphite: #242932;
  --teal: #159c9a;
  --red: #c93a34;
  --amber: #d69a2d;
  --blue: #2f70d0;
  --shadow: 0 20px 55px rgba(21, 30, 42, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background: var(--paper);
  font-family: Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(217, 222, 227, 0.82);
  background: rgba(248, 250, 249, 0.9);
  backdrop-filter: blur(16px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: min(1160px, calc(100% - 40px));
  min-height: 72px;
  margin: 0 auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border-radius: 8px;
  color: #fff;
  background: linear-gradient(135deg, var(--graphite), var(--teal));
  font-size: 13px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
}

.nav-links a {
  padding: 8px 0;
}

.nav-links a[aria-current="page"],
.nav-links a:hover {
  color: var(--ink);
}

.page {
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  gap: 34px;
  align-items: center;
  min-height: calc(100vh - 72px);
  padding: 54px 0 42px;
}

.hero-copy {
  max-width: 560px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 18px;
  font-size: clamp(38px, 6vw, 76px);
  line-height: 1.02;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(28px, 3vw, 44px);
  line-height: 1.12;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 8px;
  font-size: 22px;
  line-height: 1.2;
  letter-spacing: 0;
}

.lead {
  color: var(--muted);
  font-size: clamp(17px, 2vw, 21px);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.language-switch {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

.language-switch a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.language-switch a[aria-current="page"],
.language-switch a:hover {
  border-color: rgba(21, 156, 154, 0.4);
  background: rgba(21, 156, 154, 0.08);
  color: #087a78;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 11px 16px;
  border: 1px solid var(--ink);
  border-radius: 6px;
  background: var(--ink);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
}

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

.btn.secondary {
  border-color: var(--line);
  background: #fff;
  color: var(--ink);
}

.visual-stack {
  display: grid;
  gap: 16px;
}

.media-card {
  overflow: hidden;
  border: 1px solid rgba(217, 222, 227, 0.9);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.media-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.mini-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.mini-stat {
  min-height: 94px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.mini-stat strong {
  display: block;
  font-size: 22px;
  line-height: 1.1;
}

.mini-stat span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
}

.section {
  padding: 76px 0;
  border-top: 1px solid var(--line);
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
}

.section-head p {
  max-width: 560px;
  margin-bottom: 0;
  color: var(--muted);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.product-card {
  display: grid;
  overflow: hidden;
  min-height: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 14px 34px rgba(21, 30, 42, 0.08);
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.product-card:hover {
  border-color: rgba(21, 156, 154, 0.5);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.product-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.product-card-body {
  display: grid;
  gap: 16px;
  padding: 22px;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 9px;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--muted);
  background: #fff;
  font-size: 13px;
  font-weight: 700;
}

.tag.teal {
  border-color: rgba(21, 156, 154, 0.25);
  color: #087a78;
  background: rgba(21, 156, 154, 0.08);
}

.tag.red {
  border-color: rgba(201, 58, 52, 0.24);
  color: #9d2d29;
  background: rgba(201, 58, 52, 0.08);
}

.tag.blue {
  border-color: rgba(47, 112, 208, 0.24);
  color: #245aa7;
  background: rgba(47, 112, 208, 0.08);
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: fit-content;
  color: var(--ink);
  font-weight: 800;
}

.card-link::after {
  content: "↗";
  font-size: 16px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.feature {
  min-height: 190px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.feature p {
  color: var(--muted);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.info-card {
  min-height: 150px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.info-card span {
  display: block;
  margin-bottom: 8px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.info-card strong {
  display: block;
  margin-bottom: 8px;
  font-size: 21px;
  line-height: 1.2;
}

.info-card p {
  margin-bottom: 0;
  color: var(--muted);
}

.material-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.material-card {
  display: grid;
  gap: 18px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.material-card h3 {
  margin-bottom: 4px;
}

.material-card p {
  color: var(--muted);
}

.detail-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.detail-list li {
  display: grid;
  grid-template-columns: 118px minmax(0, 1fr);
  gap: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
}

.detail-list strong {
  color: var(--ink);
}

.detail-list span {
  color: var(--muted);
}

.care-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.care-card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.care-card ul {
  display: grid;
  gap: 10px;
  margin: 14px 0 0;
  padding-left: 20px;
  color: var(--muted);
}

.swatch-grid {
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: 12px;
}

.swatch {
  min-height: 118px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.swatch-dot {
  display: block;
  width: 100%;
  height: 46px;
  margin-bottom: 12px;
  border: 1px solid rgba(23, 26, 31, 0.12);
  border-radius: 6px;
  background: var(--swatch);
}

.swatch strong {
  display: block;
  line-height: 1.2;
}

.swatch span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}

.support-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.support-card {
  min-height: 170px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.support-card p {
  color: var(--muted);
}

.support-card .tag {
  margin-top: 8px;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.product-table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
}

.product-table th,
.product-table td {
  padding: 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.product-table th {
  color: var(--muted);
  background: rgba(21, 156, 154, 0.06);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.product-table tr:last-child td {
  border-bottom: 0;
}

.product-table td:first-child {
  font-weight: 800;
}

.detail-hero {
  grid-template-columns: minmax(320px, 1.05fr) minmax(0, 0.95fr);
}

.detail-hero .media-card {
  order: -1;
}

.spec-list {
  display: grid;
  gap: 12px;
  margin: 26px 0 0;
}

.spec-item {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: 18px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.spec-item dt {
  color: var(--muted);
  font-weight: 700;
}

.spec-item dd {
  margin: 0;
  font-weight: 700;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(300px, 1.08fr);
  gap: 36px;
  align-items: start;
}

.note-panel {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.note-panel p:last-child {
  margin-bottom: 0;
}

.footer {
  margin-top: 40px;
  padding: 34px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto;
}

@media (max-width: 900px) {
  .hero,
  .detail-hero,
  .split {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .detail-hero .media-card {
    order: 0;
  }

  .section-head {
    display: block;
  }

  .product-grid,
  .feature-grid,
  .info-grid,
  .material-grid,
  .care-grid,
  .support-grid {
    grid-template-columns: 1fr;
  }

  .swatch-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .nav {
    display: grid;
    gap: 10px;
    min-height: 86px;
    padding: 12px 0;
  }

  .nav-links {
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .page {
    width: min(100% - 28px, 1160px);
  }

  .hero {
    padding-top: 32px;
  }

  .mini-row {
    grid-template-columns: 1fr;
  }

  .spec-item {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .detail-list li {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .swatch-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-inner {
    display: grid;
    width: min(100% - 28px, 1160px);
  }
}