:root {
  --ink: #102326;
  --ink-2: #244146;
  --muted: #637477;
  --line: #d9e1df;
  --bg: #f5f7f4;
  --panel: #ffffff;
  --teal: #197c7a;
  --teal-dark: #0f5f62;
  --leaf: #9fbe45;
  --coral: #d56a3f;
  --gold: #c79d4f;
  --shadow: 0 18px 45px rgba(16, 35, 38, .10);
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg);
  color: var(--ink);
  font-family: Arial, "Microsoft YaHei", "PingFang SC", sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

body {
  margin: 0;
  background: #fff;
}

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

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

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

.container {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.top-strip {
  background: var(--ink);
  color: rgba(255, 255, 255, .82);
  font-size: 13px;
}

.top-strip .container {
  display: flex;
  gap: 18px;
  align-items: center;
  min-height: 34px;
  flex-wrap: wrap;
}

.top-strip a {
  color: #fff;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.nav-wrap {
  min-height: 78px;
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 188px;
  font-weight: 700;
  color: var(--ink);
}

.brand img {
  width: 158px;
  max-height: 54px;
  height: auto;
  object-fit: contain;
}

.brand span {
  white-space: nowrap;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.main-nav a {
  padding: 10px 12px;
  color: var(--ink-2);
  border-radius: 6px;
  font-size: 15px;
}

.main-nav a:hover,
.main-nav a.is-active {
  background: #edf4f1;
  color: var(--teal-dark);
}

.nav-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-weight: 700;
  cursor: pointer;
}

.nav-cta,
.button--primary {
  background: var(--teal);
  color: #fff;
}

.nav-cta:hover,
.button--primary:hover {
  background: var(--teal-dark);
}

.button--ghost {
  border-color: rgba(255, 255, 255, .7);
  color: #fff;
}

.button--ghost-dark {
  border-color: var(--line);
  color: var(--ink);
  background: #fff;
}

.button--light {
  background: #fff;
  color: var(--ink);
}

.button--block {
  width: 100%;
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 6px;
  padding: 9px;
}

.menu-toggle span {
  display: block;
  height: 2px;
  background: var(--ink);
  margin: 5px 0;
}

.hero {
  min-height: 540px;
  background-size: cover;
  background-position: center;
  color: #fff;
  display: flex;
  align-items: center;
}

.hero__inner {
  padding: 96px 0;
}

.eyebrow {
  color: var(--teal);
  font-weight: 800;
  text-transform: uppercase;
  font-size: 13px;
  margin-bottom: 10px;
}

.hero .eyebrow,
.page-hero .eyebrow,
.product-hero .eyebrow,
.section--cta .eyebrow {
  color: #cce8df;
}

.hero h1 {
  max-width: 760px;
  font-size: 48px;
  line-height: 1.16;
  font-weight: 800;
}

.hero__text {
  max-width: 710px;
  margin-top: 22px;
  color: rgba(255, 255, 255, .88);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 30px;
}

.section {
  padding: 82px 0;
}

.section--tight {
  padding: 0;
}

.section--muted {
  background: var(--bg);
}

.section--cta {
  background: var(--ink);
  color: #fff;
}

.section-head {
  margin-bottom: 28px;
}

.section-head h2,
.split-band h2,
.content-panel h2,
.spec-panel h2,
.contact-panel h2,
.inquiry-panel h2 {
  font-size: 32px;
  line-height: 1.25;
  margin-bottom: 12px;
}

.section-head p {
  max-width: 760px;
  color: var(--muted);
}

.stats-band {
  transform: translateY(-42px);
  background: #fff;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.stats-band div {
  padding: 26px 28px;
  border-left: 1px solid var(--line);
}

.stats-band div:first-child {
  border-left: 0;
}

.stats-band strong {
  display: block;
  font-size: 34px;
  color: var(--teal-dark);
  line-height: 1;
}

.stats-band span {
  display: block;
  color: var(--muted);
  margin-top: 8px;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

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

.product-card {
  border: 1px solid var(--line);
  background: #fff;
  min-height: 100%;
}

.product-card__image {
  display: block;
  aspect-ratio: 16 / 10;
  background: #eef3f1;
  overflow: hidden;
}

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

.product-card__body {
  padding: 22px;
}

.product-card h3 {
  font-size: 20px;
  line-height: 1.35;
  margin-bottom: 10px;
}

.product-card p {
  color: var(--muted);
  font-size: 15px;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 3px 9px;
  border-radius: 999px;
  background: #edf4f1;
  color: var(--teal-dark);
  font-size: 13px;
  font-weight: 700;
}

.solution-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.solution-card {
  border: 1px solid var(--line);
  background: #fff;
  padding: 24px;
  min-height: 210px;
}

.solution-card__icon,
.solution-row__icon {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--ink);
  color: #fff;
  border-radius: 50%;
  font-weight: 800;
  margin-bottom: 18px;
}

.solution-card h3 {
  font-size: 21px;
  margin-bottom: 10px;
}

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

.split-band {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 42px;
  align-items: center;
}

.split-band--reverse {
  grid-template-columns: .95fr 1.05fr;
}

.split-band img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border: 1px solid var(--line);
}

.split-band p {
  color: var(--muted);
  margin-bottom: 18px;
}

.text-link {
  display: inline-flex;
  color: var(--teal-dark);
  font-weight: 800;
  margin-top: 8px;
}

.cta-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.cta-band h2 {
  font-size: 34px;
  margin-bottom: 8px;
}

.cta-band p {
  color: rgba(255, 255, 255, .78);
  max-width: 760px;
}

.page-hero,
.product-hero {
  background: linear-gradient(135deg, var(--ink), #174d51 62%, #496d4a);
  color: #fff;
  padding: 82px 0;
}

.page-hero h1,
.product-hero h1 {
  font-size: 42px;
  line-height: 1.2;
  max-width: 880px;
}

.page-hero p,
.product-hero p {
  max-width: 760px;
  color: rgba(255, 255, 255, .82);
  margin-top: 14px;
}

.product-tools {
  display: grid;
  gap: 18px;
  margin-bottom: 26px;
}

.search-box {
  display: grid;
  gap: 8px;
  color: var(--ink);
  font-weight: 700;
}

.search-box input,
.inquiry-panel input,
.inquiry-panel textarea,
.admin-input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  min-height: 46px;
  padding: 10px 12px;
  font: inherit;
}

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

.filter-pill {
  min-height: 36px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 999px;
  padding: 7px 13px;
  cursor: pointer;
}

.filter-pill.is-active {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}

.product-hero__grid {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 48px;
  align-items: center;
}

.product-hero figure {
  margin: 0;
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .22);
  padding: 14px;
}

.product-hero figure img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: #fff;
}

.product-hero figcaption {
  color: rgba(255, 255, 255, .72);
  margin-top: 10px;
  font-size: 14px;
}

.product-hero__english {
  font-weight: 700;
  color: #d8eee8 !important;
}

.product-detail-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  gap: 28px;
  align-items: start;
}

.content-panel,
.spec-panel,
.contact-panel,
.inquiry-panel {
  border: 1px solid var(--line);
  background: #fff;
  padding: 28px;
}

.content-panel h2 {
  margin-top: 28px;
}

.content-panel h2:first-child {
  margin-top: 0;
}

.content-panel p {
  color: var(--ink-2);
}

.check-list {
  display: grid;
  gap: 10px;
  padding: 0;
  margin: 14px 0 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 26px;
  color: var(--ink-2);
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--leaf);
}

.notice {
  margin-top: 28px;
  padding: 16px;
  background: #fff8ed;
  color: #6f4d18;
  border: 1px solid #efd7a7;
}

.spec-panel {
  position: sticky;
  top: 116px;
}

.spec-panel div {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.spec-panel span {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.spec-panel strong {
  display: block;
  margin-top: 4px;
}

.spec-panel .button {
  margin-top: 20px;
}

.solution-stack {
  display: grid;
  gap: 22px;
}

.solution-row {
  display: grid;
  grid-template-columns: 330px 1fr;
  gap: 28px;
  border: 1px solid var(--line);
  background: #fff;
  padding: 28px;
}

.solution-row h2 {
  margin-bottom: 10px;
}

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

.mini-product-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.mini-product-list a {
  border: 1px solid var(--line);
  padding: 16px;
  background: var(--bg);
}

.mini-product-list span {
  display: block;
  color: var(--muted);
  margin-top: 4px;
  font-size: 14px;
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.capability-grid--large {
  grid-template-columns: repeat(3, 1fr);
}

.capability-grid article {
  border: 1px solid var(--line);
  background: #fff;
  padding: 24px;
}

.capability-grid h3 {
  margin-bottom: 10px;
}

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

.capability-grid span {
  display: inline-flex;
  margin-top: 16px;
  color: var(--coral);
  font-weight: 800;
}

.evidence-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.evidence-grid figure {
  margin: 0;
  border: 1px solid var(--line);
  background: #fff;
}

.evidence-grid img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.evidence-grid figcaption {
  padding: 18px;
}

.evidence-grid span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
}

.contact-grid {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 28px;
}

.contact-panel p {
  margin-top: 14px;
}

.qr {
  width: 148px;
  margin-top: 22px;
  border: 1px solid var(--line);
}

.inquiry-panel {
  display: grid;
  gap: 16px;
}

.inquiry-panel label {
  display: grid;
  gap: 7px;
  font-weight: 700;
}

.article-page {
  padding: 70px 0;
}

.article-layout {
  max-width: 860px;
}

.article-layout h1 {
  font-size: 40px;
  line-height: 1.22;
  margin-bottom: 14px;
}

.article-summary {
  color: var(--muted);
  font-size: 18px;
}

.article-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  margin: 28px 0;
  border: 1px solid var(--line);
}

.article-content p {
  margin-top: 18px;
  color: var(--ink-2);
}

.site-footer {
  background: #0e1f22;
  color: rgba(255, 255, 255, .76);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr .8fr 1fr;
  gap: 42px;
  padding: 54px 0;
}

.footer-logo {
  width: 160px;
  max-height: 60px;
  object-fit: contain;
  background: #fff;
  border-radius: 4px;
  padding: 6px;
  margin-bottom: 16px;
}

.site-footer h3 {
  color: #fff;
  margin-bottom: 12px;
}

.site-footer a {
  display: block;
  color: rgba(255, 255, 255, .86);
  margin-top: 7px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .12);
  padding: 18px 0;
  font-size: 13px;
}

@media (max-width: 980px) {
  .nav-wrap {
    flex-wrap: wrap;
    padding: 14px 0;
  }

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

  .main-nav {
    display: none;
    width: 100%;
    order: 4;
    flex-direction: column;
    align-items: stretch;
  }

  .main-nav.is-open {
    display: flex;
  }

  .nav-cta {
    display: none;
  }

  .hero h1 {
    font-size: 38px;
  }

  .stats-band,
  .product-grid,
  .solution-grid,
  .capability-grid,
  .evidence-grid,
  .footer-grid,
  .contact-grid,
  .product-detail-grid,
  .product-hero__grid,
  .solution-row,
  .mini-product-list,
  .split-band,
  .split-band--reverse {
    grid-template-columns: 1fr;
  }

  .stats-band {
    transform: none;
    margin-top: 0;
  }

  .stats-band div {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .stats-band div:first-child {
    border-top: 0;
  }

  .spec-panel {
    position: static;
  }
}

@media (max-width: 620px) {
  .container {
    width: min(100% - 28px, 1180px);
  }

  .top-strip .container {
    gap: 8px;
  }

  .brand img {
    width: 118px;
  }

  .brand span {
    display: none;
  }

  .hero {
    min-height: 480px;
  }

  .hero__inner,
  .page-hero,
  .product-hero {
    padding: 58px 0;
  }

  .hero h1,
  .page-hero h1,
  .product-hero h1,
  .article-layout h1 {
    font-size: 32px;
  }

  .section {
    padding: 56px 0;
  }

  .section-head h2,
  .split-band h2,
  .content-panel h2,
  .spec-panel h2,
  .contact-panel h2,
  .inquiry-panel h2 {
    font-size: 26px;
  }

  .cta-band {
    display: grid;
  }

  .content-panel,
  .spec-panel,
  .contact-panel,
  .inquiry-panel,
  .solution-row {
    padding: 20px;
  }
}