:root {
  --bg: #f6f9fd;
  --bg-soft: #eef5fb;
  --surface: rgba(255, 255, 255, 0.94);
  --surface-strong: #ffffff;
  --surface-alt: #f8fbff;
  --line: rgba(101, 125, 161, 0.15);
  --line-strong: rgba(101, 125, 161, 0.22);
  --text: #182742;
  --text-soft: #617694;
  --accent: #22a9ff;
  --accent-soft: rgba(34, 169, 255, 0.12);
  --shadow-xl: 0 32px 90px rgba(54, 80, 118, 0.11);
  --shadow-lg: 0 24px 50px rgba(54, 80, 118, 0.08);
  --shadow-md: 0 16px 32px rgba(54, 80, 118, 0.07);
  --radius-xl: 36px;
  --radius-lg: 28px;
  --radius-md: 22px;
  --radius-sm: 18px;
  --content-width: min(1200px, calc(100% - 32px));
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font-family: "Alibaba PuHuiTi 3.0", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(74, 188, 255, 0.12), transparent 25%),
    radial-gradient(circle at top right, rgba(175, 222, 255, 0.5), transparent 28%),
    linear-gradient(180deg, #fbfdff 0%, #f5f9fd 46%, #f7fafe 100%);
}

.site-noise {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(82, 103, 136, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(82, 103, 136, 0.05) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.16), transparent 78%);
  pointer-events: none;
}

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

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

.site-shell {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  padding-bottom: 72px;
}

.site-header {
  position: sticky;
  top: 18px;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 20px;
  width: var(--content-width);
  margin: 22px auto 0;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow-md);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand img {
  width: 140px;
  max-width: 36vw;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.brand-copy em {
  color: rgba(24, 39, 66, 0.46);
  font-style: normal;
  font-size: 11px;
  letter-spacing: 0;
}

.brand-copy strong {
  font-size: 15px;
  letter-spacing: 0;
}

.site-nav {
  display: inline-flex;
  align-items: center;
  gap: 28px;
  margin-left: auto;
}

.site-nav a {
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
}

.nav-toggle {
  display: none;
  width: 46px;
  height: 46px;
  border: 0;
  border-radius: 16px;
  background: rgba(24, 39, 66, 0.06);
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  background: var(--text);
}

.site-main {
  width: var(--content-width);
  margin: 30px auto 0;
}

.hero {
  padding: 44px 48px 46px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(246, 250, 255, 0.95)),
    radial-gradient(circle at right top, rgba(34, 169, 255, 0.1), transparent 26%);
  box-shadow: var(--shadow-xl);
}

.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(420px, 0.94fr);
  gap: 42px;
  align-items: center;
}

.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.section-kicker::before {
  width: 38px;
  height: 1px;
  background: currentColor;
  content: "";
}

.hero-copy h1,
.section-title-row h2,
.trust-list-card h3,
.cta-copy h2 {
  margin: 0;
  font-family: "DIN Alternate", "Bahnschrift", "SF Pro Display", "PingFang SC", sans-serif;
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: 0;
}

.hero-copy h1 {
  max-width: 12em;
  margin-top: 22px;
  font-size: clamp(36px, 3.6vw, 48px);
  line-height: 1.12;
}

.hero-copy h1,
.section-title-row h2,
.hero-system-card strong,
.hero-highlight-card strong,
.info-card h3,
.brand-card h3,
.product-card h3,
.case-copy h3,
.trust-copy h3,
.trust-list-card h3,
.cta-copy h2,
.product-model-title {
  display: -webkit-box;
  overflow: hidden;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.hero-description,
.section-title-row p,
.hero-system-card p,
.hero-highlight-card p,
.info-card p,
.brand-card p,
.product-card p,
.case-copy p,
.trust-copy p,
.trust-list li,
.cta-copy p {
  color: var(--text-soft);
  line-height: 1.95;
}

.hero-description {
  max-width: 36em;
  margin: 22px 0 0;
  font-size: 17px;
}

.hero-actions,
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 700;
  transition:
    transform 0.22s ease,
    box-shadow 0.22s ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  background: linear-gradient(135deg, #eefbff 0%, #91e1ff 56%, #dafef0 100%);
  box-shadow: 0 12px 24px rgba(34, 169, 255, 0.14);
}

.button-secondary {
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.86);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 32px;
}

.stat-card {
  min-height: 132px;
  padding: 18px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 10px 22px rgba(54, 80, 118, 0.05);
}

.stat-card strong {
  display: block;
  margin-bottom: 6px;
  font-size: 24px;
  line-height: 1.18;
}

.stat-card span {
  color: var(--text-soft);
  font-size: 14px;
  line-height: 1.7;
}

.hero-visual-card {
  display: grid;
  gap: 14px;
}

.hero-image-wrap {
  overflow: hidden;
  min-height: 330px;
  border: 1px solid rgba(101, 125, 161, 0.12);
  border-radius: 26px;
  background: linear-gradient(180deg, #ffffff, #edf5fc);
}

.hero-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.96) brightness(1.02);
}

.hero-visual-meta {
  display: grid;
  gap: 14px;
}

.hero-system-card {
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.86);
  box-shadow: var(--shadow-md);
}

.hero-system-card span,
.hero-highlight-card span,
.trust-label {
  display: inline-flex;
  margin-bottom: 10px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero-system-card strong,
.hero-highlight-card strong,
.info-card h3,
.brand-card h3,
.product-card h3,
.case-copy h3,
.trust-copy h3 {
  display: block;
  margin: 0;
  color: var(--text);
  font-size: 26px;
  line-height: 1.18;
}

.hero-copy h1,
.section-title-row h2,
.hero-system-card strong,
.hero-highlight-card strong,
.info-card h3,
.brand-card h3,
.product-card h3,
.case-copy h3,
.trust-copy h3,
.trust-list-card h3,
.cta-copy h2,
.product-model-title {
  display: -webkit-box;
  overflow: hidden;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.hero-system-card p {
  margin: 10px 0 0;
}

.hero-highlight-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.hero-highlight-card {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.82);
  box-shadow: var(--shadow-md);
}

.hero-highlight-card strong {
  font-size: 24px;
}

.hero-highlight-card p {
  margin: 12px 0 0;
}

.brand-strip,
.section {
  margin-top: 34px;
}

.brand-strip-track {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.brand-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  color: var(--text-soft);
  font-size: 13px;
  letter-spacing: 0;
}

.section {
  padding: 26px 0 0;
}

.section-head {
  display: grid;
  gap: 18px;
}

.section-title-row {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(360px, 0.86fr);
  gap: 42px;
  align-items: center;
}

.section-title-row h2 {
  max-width: 22ch;
  font-size: clamp(30px, 3vw, 44px);
  line-height: 1.18;
}

.section-title-row p {
  max-width: 34em;
  margin: 0;
  font-size: 17px;
}

.product-catalog-section .section-title-row h2 {
  font-size: clamp(40px, 4.2vw, 58px);
}

.product-catalog-section .section-title-row p {
  align-self: center;
}

.info-grid,
.brand-grid,
.product-grid,
.case-grid,
.certificate-grid {
  display: grid;
  gap: 22px;
  margin-top: 34px;
}

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

.info-card,
.brand-card,
.product-card,
.case-card,
.trust-feature,
.trust-list-card,
.cta-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-lg);
}

.info-card {
  padding: 30px;
}

.info-card h3 {
  margin-bottom: 14px;
  font-size: 28px;
}

.brand-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.brand-card {
  position: relative;
  overflow: hidden;
  min-height: 270px;
  padding: 30px;
}

.brand-card::after {
  position: absolute;
  right: -28px;
  bottom: -36px;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  opacity: 0.13;
  content: "";
}

.brand-card--gold::after {
  background: linear-gradient(135deg, #cb9236, #f5d493);
}

.brand-card--blue::after {
  background: linear-gradient(135deg, #3772d9, #98cbff);
}

.brand-card--cyan::after {
  background: linear-gradient(135deg, #1db6c6, #97fff3);
}

.brand-card--red::after {
  background: linear-gradient(135deg, #e35757, #ffd0d0);
}

.brand-card--silver::after {
  background: linear-gradient(135deg, #8ba5c5, #dde9f8);
}

.brand-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.brand-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  color: #ffffff;
  font-size: 12px;
  font-weight: 700;
}

.brand-card--gold .brand-index {
  background: linear-gradient(135deg, #c28929, #e7bd72);
}

.brand-card--blue .brand-index {
  background: linear-gradient(135deg, #326ed9, #69a4ff);
}

.brand-card--cyan .brand-index {
  background: linear-gradient(135deg, #23bac7, #61e7ff);
}

.brand-card--red .brand-index {
  background: linear-gradient(135deg, #db5b5b, #ff8d8d);
}

.brand-card--silver .brand-index {
  background: linear-gradient(135deg, #8097b6, #b5cae4);
}

.brand-card h3 {
  font-size: 24px;
}

.brand-card p {
  max-width: 24em;
  margin: 0;
}

.product-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.product-card {
  padding: 30px;
}

.product-card img {
  width: 76px;
  height: 76px;
  object-fit: cover;
  border-radius: 50%;
  box-shadow: 0 10px 24px rgba(54, 80, 118, 0.08);
}

.product-card h3 {
  margin-top: 24px;
  font-size: 28px;
}

.product-card p {
  margin: 14px 0 0;
}

.product-catalog-layout {
  display: grid;
  grid-template-columns: minmax(260px, 310px) minmax(0, 1fr);
  gap: 26px;
  margin-top: 38px;
}

.product-filter-panel {
  position: sticky;
  top: 120px;
  align-self: start;
  display: grid;
  gap: 22px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--surface);
  box-shadow: var(--shadow-md);
}

.product-search {
  display: grid;
  gap: 12px;
}

.product-search label,
.product-filter-group h3 {
  margin: 0;
  color: var(--text-soft);
  font-size: 13px;
  font-weight: 700;
}

.product-search div {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 78px;
  gap: 10px;
}

.product-search input {
  min-width: 0;
  flex: 1;
  min-height: 48px;
  padding: 0 14px;
  border: 1px solid var(--line-strong);
  border-radius: 13px;
  color: var(--text);
  font: inherit;
  background: var(--surface-strong);
  outline: none;
}

.product-search input:focus {
  border-color: rgba(34, 169, 255, 0.42);
  box-shadow: 0 0 0 4px rgba(34, 169, 255, 0.1);
}

.product-search button {
  min-height: 48px;
  padding: 0 12px;
  border: 0;
  border-radius: 13px;
  color: #ffffff;
  font: inherit;
  font-weight: 700;
  background: var(--accent);
  cursor: pointer;
}

.product-filter-group {
  display: grid;
  gap: 6px;
}

.product-filter-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  min-height: 38px;
  padding: 8px 11px;
  border: 1px solid transparent;
  border-radius: 10px;
  color: var(--text-soft);
  transition:
    background 0.18s ease,
    border-color 0.18s ease,
    color 0.18s ease;
}

.product-filter-link:hover,
.product-filter-link.is-active {
  border-color: rgba(34, 169, 255, 0.22);
  color: var(--text);
  background: rgba(34, 169, 255, 0.08);
}

.product-filter-link em {
  font-style: normal;
  font-size: 12px;
}

.product-catalog-main {
  display: grid;
  gap: 18px;
  min-width: 0;
}

.product-result-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 4px;
  color: var(--text-soft);
}

.product-result-head div {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.product-result-head strong {
  color: var(--text);
}

.product-model-list {
  display: grid;
  gap: 14px;
}

.product-model-card {
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr);
  gap: 18px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: var(--shadow-md);
}

.product-model-image {
  display: grid;
  place-items: center;
  overflow: hidden;
  aspect-ratio: 1 / 1;
  border-radius: 18px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  text-align: center;
  background:
    linear-gradient(180deg, #edf4fb, #ffffff),
    radial-gradient(circle at 20% 10%, rgba(40, 184, 140, 0.18), transparent 34%);
}

.product-model-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-model-copy {
  min-width: 0;
}

.product-model-meta,
.product-specs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.product-model-meta span,
.product-specs span {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0 9px;
  border-radius: 999px;
  color: var(--text-soft);
  font-size: 12px;
  font-weight: 700;
  background: var(--accent-soft);
}

.product-model-title {
  margin: 12px 0 0;
  font-size: 26px;
  line-height: 1.24;
}

.product-model-copy p {
  margin: 10px 0 0;
  color: var(--text-soft);
  line-height: 1.8;
}

.product-specs {
  margin-top: 12px;
}

.product-pagination {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.product-pagination a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--text-soft);
  font-weight: 700;
  background: var(--surface);
}

.product-pagination a.is-active {
  border-color: rgba(34, 169, 255, 0.28);
  color: var(--text);
  background: var(--accent-soft);
}

.product-empty {
  display: grid;
  place-items: center;
  min-height: 280px;
  padding: 34px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-md);
  text-align: center;
  background: var(--surface);
}

.product-empty h3 {
  margin: 0;
  font-size: 24px;
}

.product-empty p {
  margin: 10px 0 0;
  color: var(--text-soft);
}

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

.case-card {
  overflow: hidden;
}

.case-image-wrap {
  overflow: hidden;
  aspect-ratio: 1.38 / 1;
  background: linear-gradient(180deg, #edf4fb, #ffffff);
}

.case-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.case-copy {
  padding: 26px 28px 30px;
}

.case-tag {
  display: inline-flex;
  margin-bottom: 14px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.case-copy h3 {
  font-size: 34px;
}

.case-copy p {
  margin: 14px 0 0;
}

.trust-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  gap: 22px;
  margin-top: 34px;
}

.trust-feature,
.trust-list-card {
  padding: 30px;
}

.trust-copy h3 {
  font-size: 38px;
}

.trust-copy p {
  margin: 14px 0 0;
}

.certificate-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.certificate-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-strong);
}

.certificate-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.trust-list-card h3 {
  margin-top: 8px;
  font-size: 32px;
}

.trust-list {
  display: grid;
  gap: 14px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.trust-list li {
  position: relative;
  padding: 18px 18px 18px 48px;
  border-radius: var(--radius-sm);
  background: var(--surface-alt);
}

.trust-list li::before {
  position: absolute;
  left: 18px;
  top: 18px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: linear-gradient(135deg, #53cfff, #2d9dff);
  content: "";
}

.cta-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 30px;
  align-items: center;
  padding: 34px;
}

.cta-copy h2 {
  max-width: 14ch;
  margin-top: 16px;
  font-size: clamp(34px, 4vw, 54px);
}

.cta-copy p {
  max-width: 42em;
  margin: 18px 0 0;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition:
    opacity 0.7s ease,
    transform 0.7s ease;
}

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

@media (max-width: 1180px) {
  .hero-layout,
  .section-title-row,
  .product-catalog-layout,
  .trust-grid,
  .cta-panel {
    grid-template-columns: 1fr;
  }

  .section-title-row h2,
  .cta-copy h2 {
    max-width: none;
  }

  .hero-copy h1 {
    max-width: none;
  }

  .product-filter-panel {
    position: static;
  }

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

@media (max-width: 860px) {
  .site-header {
    top: 12px;
    flex-wrap: wrap;
  }

  .nav-toggle {
    display: inline-block;
    margin-left: auto;
  }

  .site-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    padding-top: 12px;
  }

  .site-header.is-open .site-nav {
    display: flex;
  }

  .site-nav a {
    min-height: 44px;
    padding: 10px 14px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.82);
  }

  .hero {
    padding: 32px 24px;
  }

  .hero-highlight-grid,
  .info-grid,
  .brand-grid,
  .product-grid,
  .case-grid,
  .certificate-grid,
  .hero-stats {
    grid-template-columns: 1fr;
  }

  .hero-description,
  .section-title-row p {
    font-size: 16px;
  }

  .hero-image-wrap {
    min-height: 280px;
  }

  .case-copy h3,
  .trust-copy h3,
  .trust-list-card h3 {
    font-size: 28px;
  }
}

@media (max-width: 640px) {
  :root {
    --content-width: calc(100% - 24px);
  }

  .site-header {
    padding: 14px 14px 16px;
    border-radius: 24px;
  }

  .brand img {
    width: 116px;
  }

  .brand-copy em,
  .brand-copy strong {
    display: none;
  }

  .site-main {
    margin-top: 20px;
  }

  .hero {
    padding: 28px 18px;
    border-radius: 30px;
  }

  .hero-copy h1 {
    margin-top: 20px;
    font-size: clamp(30px, 9vw, 38px);
  }

  .hero-description {
    margin-top: 22px;
  }

  .button {
    width: 100%;
  }

  .hero-actions,
  .cta-actions {
    flex-direction: column;
  }

  .product-model-card {
    grid-template-columns: 1fr;
  }

  .product-search div {
    grid-template-columns: 1fr;
  }

  .section {
    margin-top: 24px;
  }

  .section-title-row h2,
  .cta-copy h2 {
    font-size: clamp(28px, 9vw, 38px);
  }

  .product-catalog-section .section-title-row h2 {
    font-size: clamp(34px, 11vw, 46px);
  }

  .section-title-row p,
  .cta-copy p {
    margin-top: 0;
  }

  .info-card,
  .brand-card,
  .product-card,
  .trust-feature,
  .trust-list-card,
  .cta-panel {
    padding: 24px 20px;
  }

  .case-copy {
    padding: 22px 20px 24px;
  }
}