:root {
  --ink: #102033;
  --muted: #5d6b7c;
  --line: #dfe6ee;
  --panel: #ffffff;
  --soft: #f5f8fb;
  --blue: #07569b;
  --cyan: #12a9c8;
  --orange: #f05a3c;
  --shadow: 0 18px 55px rgba(16, 32, 51, 0.12);
  /* Brand typography: modern technology-company system stack.
     Latin glyphs use contemporary sans-serif UI fonts first; Chinese glyphs fall back to high-legibility SC fonts. */
  --font-latin: Inter, "SF Pro Text", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  --font-cn-title: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", "Heiti SC", "SimHei";
  --font-cn-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", "Hiragino Sans GB", "WenQuanYi Micro Hei";
  --font-body: var(--font-latin), var(--font-cn-body), sans-serif;
  --font-title: var(--font-latin), var(--font-cn-title), sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--soft);
  font-family: var(--font-body);
  line-height: 1.7;
}

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

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

a:focus-visible,
button:focus-visible {
  outline: 3px solid rgba(18, 169, 200, 0.58);
  outline-offset: 3px;
}

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

h1,
h2,
h3,
h4,
h5,
h6,
.hero-subtitle,
.section-heading,
.flow-step strong {
  font-family: var(--font-title);
  font-weight: 700;
}

h1 {
  margin-bottom: 18px;
  font-size: clamp(38px, 6vw, 68px);
  line-height: 1.08;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.2;
}

h3 {
  font-size: 20px;
  line-height: 1.35;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 74px;
  padding: 12px clamp(20px, 4vw, 64px);
  border-bottom: 1px solid rgba(223, 230, 238, 0.88);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  width: 142px;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(12px, 1.55vw, 24px);
  color: var(--muted);
  font-size: 14px;
}

.nav-item {
  position: relative;
  display: flex;
  align-items: center;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  transition: color 0.2s ease;
}

.nav-link:hover,
.nav-link.is-current {
  color: var(--blue);
}

.nav-contact {
  padding: 0 14px;
  border-radius: 6px;
  background: var(--blue);
  color: #fff;
  font-weight: 700;
}

.nav-contact:hover,
.nav-contact.is-current {
  color: #fff;
  background: #064b88;
}

.submenu-toggle {
  display: none;
}

.submenu {
  position: absolute;
  top: calc(100% + 6px);
  left: -14px;
  z-index: 2;
  display: grid;
  min-width: 218px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.submenu a {
  padding: 8px 10px;
  border-radius: 6px;
  color: var(--muted);
  white-space: nowrap;
}

.submenu a:hover {
  background: var(--soft);
  color: var(--blue);
}

.nav-item:hover .submenu,
.nav-item:focus-within .submenu {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  cursor: pointer;
}

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

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(340px, 0.95fr);
  gap: clamp(28px, 5vw, 76px);
  align-items: center;
  min-height: calc(100vh - 74px);
  padding: clamp(52px, 8vw, 92px) clamp(20px, 6vw, 92px) 72px;
  background:
    linear-gradient(120deg, rgba(7, 86, 155, 0.95), rgba(12, 40, 68, 0.96) 58%, rgba(240, 90, 60, 0.78)),
    url("assets/source/image5.png") center / cover;
  color: #fff;
}

.hero-copy {
  max-width: 760px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--orange);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #ffb39f;
}

.hero-subtitle {
  margin-bottom: 16px;
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 700;
}

.hero-text {
  max-width: 680px;
  margin-bottom: 30px;
  color: rgba(255, 255, 255, 0.84);
  font-size: 17px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 11px 22px;
  border-radius: 8px;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

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

.button.primary {
  background: var(--orange);
  color: #fff;
  box-shadow: 0 12px 34px rgba(240, 90, 60, 0.32);
}

.button.secondary {
  border: 1px solid rgba(255, 255, 255, 0.38);
  color: #fff;
}

.hero-media {
  position: relative;
  min-height: 450px;
}

.hero-product {
  position: absolute;
  border: 10px solid rgba(255, 255, 255, 0.85);
  border-radius: 8px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.32);
  object-fit: cover;
}

.hero-product.main {
  top: 8%;
  right: 2%;
  width: min(86%, 520px);
  aspect-ratio: 4 / 3;
}

.hero-product.floating {
  bottom: 0;
  left: 0;
  width: min(56%, 330px);
  aspect-ratio: 1 / 1;
}

.section {
  padding: clamp(56px, 8vw, 96px) clamp(20px, 6vw, 92px);
}

.section-heading {
  max-width: 920px;
  margin-bottom: 34px;
}

.about,
.products,
.contact {
  background: #fff;
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 38px;
}

.about-text {
  max-width: 850px;
  color: var(--muted);
  font-size: 17px;
}

.stats {
  display: grid;
  gap: 14px;
}

.stats article,
.feature-grid article,
.skeleton-card {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.stats article {
  background: var(--soft);
}

.stats strong {
  display: block;
  color: var(--blue);
  font-size: 38px;
  line-height: 1;
}

.stats span,
.feature-grid p,
.product-card p,
.founder-copy p,
.contact-panel p,
.skeleton-card p,
.page-intro p {
  color: var(--muted);
}

.feature-grid,
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.feature-grid article {
  min-height: 250px;
  box-shadow: 0 10px 35px rgba(16, 32, 51, 0.06);
}

.feature-grid span {
  display: inline-block;
  margin-bottom: 34px;
  color: var(--cyan);
  font-size: 14px;
  font-weight: 700;
}

.product-card {
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-height: 410px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 12px 36px rgba(16, 32, 51, 0.08);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.product-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  background: #eef3f7;
  object-fit: cover;
}

.product-card div {
  padding: 20px;
}

.direction-tabs {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 16px clamp(20px, 6vw, 92px);
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.direction-tab {
  flex: 0 0 auto;
  padding: 9px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-size: 14px;
  font-weight: 700;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.direction-tab:hover,
.direction-tab.is-active {
  border-color: var(--blue);
  background: var(--blue);
  color: #fff;
}

.direction-panel {
  scroll-margin-top: 94px;
}

.direction-panel[hidden] {
  display: none;
}

.direction-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.direction-card {
  display: block;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

a.direction-card:hover {
  border-color: rgba(7, 86, 155, 0.28);
  box-shadow: 0 12px 34px rgba(16, 32, 51, 0.08);
  transform: translateY(-3px);
}

.direction-card h3 {
  margin-bottom: 8px;
}

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

.direction-card strong {
  display: inline-flex;
  gap: 7px;
  align-items: center;
  margin-top: 22px;
  color: var(--blue);
}

.placeholder-card,
.placeholder-panel {
  background: var(--soft);
}

.placeholder-panel {
  max-width: 860px;
  padding: clamp(22px, 4vw, 34px);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  border-radius: 8px;
}

.placeholder-panel h2 {
  margin-bottom: 10px;
  color: var(--blue);
  font-size: clamp(24px, 3vw, 34px);
}

.placeholder-panel p {
  margin-bottom: 0;
  color: var(--muted);
}

.direction-cta {
  margin-top: 22px;
}

.founder {
  background: linear-gradient(135deg, #eef6f8, #f8fafc);
}

.founder-copy {
  max-width: 920px;
}

.text-link {
  display: inline-flex;
  gap: 7px;
  align-items: center;
  margin-top: 26px;
  color: var(--blue);
  font-weight: 700;
}

.detail-card .text-link,
.legal-section .text-link {
  margin-top: 0;
}

.contact-panel {
  display: grid;
  grid-template-columns: minmax(260px, 0.72fr) minmax(0, 1fr);
  gap: 32px;
  padding: clamp(24px, 4vw, 42px);
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
}

.contact-panel p,
.contact-panel dt {
  color: rgba(255, 255, 255, 0.7);
}

.contact-panel dl {
  display: grid;
  gap: 18px;
  margin: 0;
}

.contact-panel dt {
  margin-bottom: 4px;
  font-size: 13px;
}

.contact-panel dd {
  margin: 0;
  overflow-wrap: anywhere;
  font-weight: 700;
}

.page-hero {
  padding: clamp(52px, 7vw, 82px) clamp(20px, 6vw, 92px);
  background: linear-gradient(120deg, #07569b, #102b49);
  color: #fff;
}

.page-hero h1 {
  margin-bottom: 12px;
  font-size: clamp(34px, 5vw, 56px);
}

.page-hero p {
  max-width: 720px;
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.78);
}

.breadcrumbs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
}

.page-intro {
  max-width: 820px;
  margin-bottom: 32px;
}

.skeleton-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.skeleton-card {
  min-height: 178px;
  scroll-margin-top: 96px;
}

.skeleton-card h2 {
  margin-bottom: 12px;
  color: var(--blue);
  font-size: 21px;
}

.placeholder {
  display: inline-flex;
  margin-top: 8px;
  padding: 4px 8px;
  border-radius: 999px;
  background: #eef6fb;
  color: var(--blue);
  font-size: 13px;
  font-weight: 700;
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(320px, 1.14fr);
  gap: 34px;
}

.contact-details,
.contact-form-panel {
  padding: clamp(22px, 4vw, 34px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.contact-details dl {
  display: grid;
  gap: 16px;
  margin: 26px 0 0;
}

.contact-details dt {
  color: var(--muted);
  font-size: 13px;
}

.contact-details dd {
  margin: 2px 0 0;
  overflow-wrap: anywhere;
  font-weight: 700;
}

.support-note {
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.support-note p,
.contact-form-panel p,
.form-status {
  color: var(--muted);
}

.form-status {
  margin: 4px 0 0;
  font-size: 13px;
}

.mail-consult-panel {
  scroll-margin-top: 94px;
}

.mail-consult-panel a:not(.button) {
  color: var(--blue);
  font-weight: 700;
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.mail-consult-panel .button.secondary {
  border-color: rgba(7, 86, 155, 0.24);
  background: #fff;
  color: var(--blue);
  cursor: pointer;
  font: inherit;
}

.mail-template {
  overflow-x: auto;
  margin: 22px 0 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
  color: var(--ink);
  font: inherit;
  line-height: 1.8;
  user-select: text;
  white-space: pre-wrap;
}

.copy-status {
  min-height: 22px;
  margin-top: 8px;
}

.legal-content {
  display: grid;
  gap: 18px;
  max-width: 920px;
}

.section.alt {
  background: #fff;
}

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

.section.dark .section-heading p,
.section.dark .section-lead,
.section.dark .detail-card p {
  color: rgba(255, 255, 255, 0.72);
}

.section-lead {
  max-width: 820px;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.card-grid,
.scene-grid,
.article-grid,
.support-grid,
.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

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

.scene-grid.five {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.detail-card,
.link-card,
.scene-card,
.article-card,
.support-card,
.audience-card,
.report-placeholder,
.boundary-panel,
.map-placeholder,
.legal-section {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.link-card,
.scene-card,
.article-card {
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.link-card:hover,
.scene-card:hover,
.article-card:hover {
  border-color: rgba(7, 86, 155, 0.28);
  box-shadow: 0 12px 34px rgba(16, 32, 51, 0.08);
  transform: translateY(-3px);
}

.detail-card h3,
.link-card h3,
.scene-card h3,
.article-card h3,
.support-card h3,
.audience-card h3 {
  margin-bottom: 8px;
}

.detail-card p,
.link-card p,
.scene-card p,
.article-card p,
.support-card p,
.audience-card p,
.report-placeholder p,
.boundary-panel p,
.map-placeholder p,
.legal-section p,
.legal-section li {
  margin-bottom: 0;
  color: var(--muted);
}

.card-number {
  display: block;
  margin-bottom: 24px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 700;
}

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

.tag {
  display: inline-flex;
  padding: 4px 8px;
  border-radius: 999px;
  background: #eef6fb;
  color: var(--blue);
  font-size: 13px;
  font-weight: 700;
}

.content-stack {
  display: grid;
  gap: 24px;
}

.detail-section {
  padding: clamp(22px, 4vw, 34px);
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  scroll-margin-top: 94px;
}

.detail-section h2 {
  margin-bottom: 12px;
  color: var(--blue);
  font-size: clamp(24px, 3vw, 32px);
}

.detail-section > p {
  color: var(--muted);
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.detail-grid .detail-card {
  background: var(--soft);
}

.flow-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
}

.flow-grid.six {
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.flow-step {
  position: relative;
  min-height: 142px;
  padding: 16px;
  border: 1px solid rgba(7, 86, 155, 0.16);
  border-radius: 8px;
  background: #fff;
  list-style: none;
}

.flow-step:not(:last-child)::after {
  position: absolute;
  top: 50%;
  right: -10px;
  z-index: 1;
  color: var(--cyan);
  content: "→";
  font-weight: 700;
  transform: translate(50%, -50%);
}

.flow-step span {
  display: block;
  margin-bottom: 12px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 700;
}

.flow-step strong {
  display: block;
  margin-bottom: 5px;
  color: var(--blue);
}

.flow-step p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 14px;
}

.boundary-panel {
  margin-top: 18px;
  border-left: 3px solid var(--orange);
}

.boundary-panel h3,
.report-placeholder h3,
.map-placeholder h3,
.legal-section h2 {
  margin-bottom: 8px;
}

.report-placeholder {
  margin-top: 18px;
  background: #f8fafc;
}

.page-jump-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.page-jump-nav a {
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--blue);
  font-size: 14px;
  font-weight: 700;
}

.page-jump-nav a:hover {
  border-color: rgba(7, 86, 155, 0.28);
  background: #eef6fb;
}

.data-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  text-align: left;
}

.data-table caption {
  padding-bottom: 10px;
  color: var(--muted);
  font-size: 14px;
  text-align: left;
}

.data-table th,
.data-table td {
  padding: 12px 14px;
  border: 1px solid var(--line);
  vertical-align: top;
  font-size: 14px;
}

.data-table th {
  background: #eef6fb;
  color: var(--blue);
}

.table-scroll {
  overflow-x: auto;
}

.faq-list {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.faq-list details {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.faq-list summary {
  color: var(--blue);
  cursor: pointer;
  font-weight: 700;
}

.faq-list p {
  margin: 8px 0 0;
  color: var(--muted);
}

.timeline {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.timeline article {
  padding: 16px 18px;
  border-left: 3px solid var(--cyan);
  background: var(--soft);
}

.timeline h3 {
  margin-bottom: 4px;
}

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

.support-grid,
.map-placeholder {
  margin-top: 22px;
}

.legal-section {
  scroll-margin-top: 94px;
}

.legal-section ul {
  margin: 10px 0 0;
  padding-left: 20px;
}

.cta-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: clamp(24px, 4vw, 36px);
  border-radius: 10px;
  background: linear-gradient(120deg, #07569b, #102b49);
  color: #fff;
}

.cta-strip h2 {
  font-size: clamp(24px, 3vw, 34px);
}

.cta-strip p {
  max-width: 720px;
  margin: 8px 0 0;
  color: rgba(255, 255, 255, 0.76);
}

.cta-strip .hero-actions {
  flex: 0 0 auto;
}

.site-footer {
  background: #07111f;
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
}

.footer-main {
  display: grid;
  grid-template-columns: minmax(260px, 0.95fr) minmax(0, 1.4fr);
  gap: 48px;
  padding: 42px clamp(20px, 6vw, 92px) 30px;
}

.footer-brand strong {
  display: block;
  color: #fff;
  font-size: 18px;
}

.footer-brand p {
  max-width: 380px;
  margin: 10px 0 0;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.footer-links div {
  display: grid;
  align-content: start;
  gap: 6px;
}

.footer-links h2 {
  margin-bottom: 3px;
  color: #fff;
  font-size: 14px;
}

.footer-links a:hover,
.footer-bottom a:hover {
  color: #fff;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding: 15px clamp(20px, 6vw, 92px);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.footer-bottom span:last-child {
  display: flex;
  gap: 16px;
}

@media (max-width: 1180px) {
  .site-nav {
    gap: 11px;
    font-size: 13px;
  }
}

@media (max-width: 1020px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 8px);
    right: 18px;
    left: 18px;
    display: none;
    overflow-y: auto;
    max-height: calc(100vh - 100px);
    padding: 8px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    box-shadow: var(--shadow);
    font-size: 14px;
  }

  .site-nav.is-open {
    display: block;
  }

  .nav-item {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 42px;
  }

  .nav-link,
  .nav-contact {
    min-height: 44px;
    padding: 10px 12px;
  }

  .nav-contact {
    display: flex;
    margin-top: 4px;
  }

  .submenu-toggle {
    position: relative;
    display: block;
    border: 0;
    border-radius: 6px;
    background: transparent;
    cursor: pointer;
  }

  .submenu-toggle::before {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 8px;
    height: 8px;
    border-right: 2px solid var(--muted);
    border-bottom: 2px solid var(--muted);
    content: "";
    transform: translate(-50%, -70%) rotate(45deg);
  }

  .nav-item.is-open .submenu-toggle::before {
    transform: translate(-50%, -25%) rotate(225deg);
  }

  .submenu {
    position: static;
    grid-column: 1 / -1;
    display: none;
    min-width: 0;
    margin: 0 4px 6px;
    padding: 4px 8px;
    border: 0;
    border-left: 2px solid var(--line);
    border-radius: 0;
    box-shadow: none;
    opacity: 1;
    pointer-events: auto;
    transform: none;
  }

  .nav-item:hover .submenu,
  .nav-item:focus-within .submenu {
    display: none;
  }

  .nav-item.is-open .submenu,
  .nav-item.is-open:hover .submenu,
  .nav-item.is-open:focus-within .submenu {
    display: grid;
  }

  .hero,
  .about-grid,
  .contact-panel,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .hero-media {
    min-height: 360px;
  }

  .feature-grid,
  .product-grid,
  .direction-grid,
  .skeleton-grid,
  .card-grid,
  .card-grid.four,
  .scene-grid,
  .scene-grid.five,
  .article-grid,
  .support-grid,
  .audience-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .flow-grid,
  .flow-grid.six {
    grid-template-columns: 1fr;
  }

  .flow-step {
    min-height: 0;
  }

  .flow-step:not(:last-child)::after {
    top: auto;
    right: 50%;
    bottom: -10px;
    transform: translate(50%, 50%) rotate(90deg);
  }

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

@media (max-width: 680px) {
  .site-header {
    min-height: 66px;
    padding: 11px 18px;
  }

  .brand {
    width: 126px;
  }

  .hero {
    min-height: auto;
    padding-top: 46px;
  }

  .hero-media {
    min-height: 290px;
  }

  .hero-product {
    border-width: 6px;
  }

  .hero-product.main {
    width: 88%;
  }

  .hero-product.floating {
    width: 52%;
  }

  .feature-grid,
  .product-grid,
  .direction-grid,
  .stats,
  .skeleton-grid,
  .card-grid,
  .card-grid.four,
  .scene-grid,
  .scene-grid.five,
  .article-grid,
  .support-grid,
  .audience-grid,
  .detail-grid,
  .footer-main,
  .footer-links {
    grid-template-columns: 1fr;
  }

  .product-card {
    min-height: 0;
  }

  .contact-panel {
    padding: 22px;
  }

  .contact-actions {
    display: grid;
  }

  .contact-actions .button {
    width: 100%;
  }

  .footer-main {
    gap: 28px;
  }
}

/* 2026 visual polish: standard responsive website refinements without changing page content. */
:root {
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --max-content: 1220px;
}

body {
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

.site-header {
  box-shadow: 0 8px 30px rgba(16, 32, 51, 0.05);
}

.brand img {
  width: 100%;
  height: auto;
}

.section > :where(.section-heading, .about-grid, .feature-grid, .product-grid, .contact-panel, .content-stack, .card-grid, .scene-grid, .article-grid, .support-grid, .audience-grid, .contact-layout, .skeleton-grid, .cta-strip, .data-table, .case-summary-grid, .cases-showcase, .qualification-grid),
.page-hero > *,
.hero > * {
  max-width: var(--max-content);
}

.section > :where(.section-heading, .about-grid, .feature-grid, .product-grid, .contact-panel, .content-stack, .card-grid, .scene-grid, .article-grid, .support-grid, .audience-grid, .contact-layout, .skeleton-grid, .cta-strip, .data-table, .case-summary-grid, .cases-showcase, .qualification-grid) {
  margin-left: auto;
  margin-right: auto;
}

.page-hero > * {
  margin-left: auto;
  margin-right: auto;
}

.hero {
  justify-content: center;
}

.hero > * {
  width: 100%;
}

.section-heading {
  margin-left: auto;
  margin-right: auto;
}

.section-heading .eyebrow,
.section-heading h2,
.section-heading .section-lead {
  max-width: 920px;
}

.button,
.nav-contact,
.product-card,
.direction-card,
.placeholder-panel,
.contact-panel,
.contact-details,
.contact-form-panel,
.detail-card,
.link-card,
.scene-card,
.article-card,
.support-card,
.audience-card,
.report-placeholder,
.boundary-panel,
.map-placeholder,
.legal-section,
.detail-section,
.flow-step,
.product-entry,
.product-detail,
.mail-template {
  border-radius: var(--radius-md);
}

.page-hero {
  position: relative;
  overflow: hidden;
}

.page-hero::after {
  position: absolute;
  right: -120px;
  bottom: -160px;
  width: 380px;
  height: 380px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(18, 169, 200, 0.28), rgba(18, 169, 200, 0));
  content: "";
}

.page-hero > * {
  position: relative;
  z-index: 1;
}

.detail-card,
.link-card,
.scene-card,
.article-card,
.support-card,
.audience-card,
.skeleton-card,
.product-entry,
.contact-details,
.contact-form-panel,
.legal-section {
  box-shadow: 0 10px 30px rgba(16, 32, 51, 0.045);
}

.detail-card p,
.link-card p,
.scene-card p,
.article-card p,
.support-card p,
.audience-card p,
.product-card p,
.product-entry p,
.section-lead,
.page-hero p {
  line-height: 1.85;
}

.cta-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding: clamp(24px, 4vw, 38px);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #07569b, #102b49);
  color: #fff;
  box-shadow: var(--shadow);
}

.cta-strip p {
  margin-bottom: 0;
  color: rgba(255,255,255,0.76);
}

.cta-strip .button.secondary {
  background: rgba(255,255,255,0.08);
}

.data-table {
  overflow: hidden;
  border-radius: var(--radius-md);
  box-shadow: 0 12px 34px rgba(16, 32, 51, 0.05);
}

@media (max-width: 1180px) {
  .feature-grid,
  .product-grid,
  .card-grid.four,
  .scene-grid.five {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .flow-step:not(:last-child)::after {
    display: none;
  }
}

@media (max-width: 760px) {
  .section {
    padding-top: 48px;
    padding-bottom: 56px;
  }

  .page-hero {
    padding-top: 44px;
    padding-bottom: 48px;
  }

  .feature-grid,
  .product-grid,
  .card-grid,
  .card-grid.four,
  .scene-grid,
  .scene-grid.five,
  .article-grid,
  .support-grid,
  .audience-grid,
  .detail-grid,
  .direction-grid,
  .flow-grid,
  .flow-grid.six,
  .about-grid,
  .contact-layout,
  .contact-panel {
    grid-template-columns: 1fr;
  }

  .cta-strip {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero-actions,
  .button {
    width: 100%;
  }
}

/* 2026-06 alignment refinement: keep every page hero aligned with main content grid. */
.page-hero {
  --page-side-padding: clamp(20px, 6vw, 92px);
  padding-left: var(--page-side-padding);
  padding-right: var(--page-side-padding);
}

.page-hero > * {
  width: 100%;
  max-width: var(--max-content);
  margin-left: 0;
  margin-right: auto;
}

.page-hero .breadcrumbs,
.page-hero h1,
.page-hero p,
.page-hero .hero-actions {
  display: block;
  text-align: left;
}

.page-hero .breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
}

.page-hero h1 {
  max-width: var(--max-content);
}

.page-hero p {
  max-width: min(920px, var(--max-content));
  margin-top: 0;
}

.page-hero .hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-start;
}

@media (min-width: 1500px) {
  .page-hero {
    padding-left: max(var(--page-side-padding), calc((100vw - var(--max-content)) / 2));
    padding-right: max(var(--page-side-padding), calc((100vw - var(--max-content)) / 2));
  }
}

@media (max-width: 720px) {
  .page-hero {
    padding-left: 20px;
    padding-right: 20px;
  }

  .page-hero .hero-actions {
    gap: 12px;
  }
}

/* 2026-06 unified alignment pass: align 首页、产品与方案、技术能力 with later content pages. */
:root {
  --container-gutter: clamp(20px, 6vw, 92px);
  --container-inline: max(var(--container-gutter), calc((100vw - var(--max-content)) / 2));
}

.hero,
.page-hero,
.section,
.direction-tabs,
.product-jump-nav {
  padding-left: var(--container-inline);
  padding-right: var(--container-inline);
}

.hero {
  grid-template-columns: minmax(0, 650px) minmax(320px, 510px);
  justify-content: center;
}

.hero > * {
  max-width: none;
}

.hero-copy,
.page-hero > *,
.section > :where(.page-intro, .direction-grid, .product-entry-grid, .product-detail, .boundary-panel, .hero-actions) {
  width: 100%;
  max-width: var(--max-content);
  margin-left: 0;
  margin-right: auto;
}

.page-hero .breadcrumbs,
.page-hero h1,
.page-hero p,
.page-hero .hero-actions,
.page-hero .page-jump-nav {
  max-width: min(920px, var(--max-content));
  margin-left: 0;
  margin-right: auto;
  text-align: left;
}

.page-hero .page-jump-nav,
.page-hero .hero-actions {
  display: flex;
  justify-content: flex-start;
}

.direction-tabs,
.product-jump-nav {
  justify-content: flex-start;
}

.section > .page-intro {
  max-width: 920px;
}

.section > .hero-actions {
  margin-top: 22px;
}

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

/* 2026-06 mobile deployment refinement: responsive layout and touch usability. */
html,
body {
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
}

.site-header,
.hero,
.page-hero,
.section,
.direction-tabs,
.product-jump-nav,
.footer-main,
.footer-bottom {
  max-width: 100vw;
}

.direction-tabs,
.product-jump-nav,
.page-jump-nav {
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.direction-tabs::-webkit-scrollbar,
.product-jump-nav::-webkit-scrollbar,
.page-jump-nav::-webkit-scrollbar {
  display: none;
}

@media (max-width: 1020px) {
  .site-header {
    position: sticky;
  }

  .site-nav {
    right: 16px;
    left: 16px;
    width: auto;
  }

  .submenu a {
    white-space: normal;
  }
}

@media (max-width: 760px) {
  :root {
    --container-gutter: 18px;
    --container-inline: 18px;
  }

  body {
    font-size: 15px;
    line-height: 1.75;
  }

  h1 {
    font-size: clamp(34px, 12vw, 46px);
    line-height: 1.12;
    letter-spacing: -0.03em;
  }

  h2 {
    font-size: clamp(26px, 8vw, 34px);
  }

  .site-header {
    min-height: 64px;
    padding: 10px 18px;
  }

  .brand {
    width: 118px;
  }

  .nav-toggle {
    width: 40px;
    height: 40px;
  }

  .site-nav {
    top: calc(100% + 6px);
    right: 12px;
    left: 12px;
    max-height: calc(100svh - 82px);
    border-radius: 14px;
  }

  .hero {
    display: block;
    min-height: auto;
    padding-top: 48px;
    padding-bottom: 52px;
    background-position: center;
  }

  .hero-copy {
    max-width: 100%;
  }

  .hero .eyebrow,
  .breadcrumbs {
    font-size: 13px;
    line-height: 1.6;
  }

  .hero-subtitle,
  .hero-text,
  .page-hero p,
  .section-lead {
    max-width: 100%;
    font-size: 15px;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    width: 100%;
  }

  .hero-actions .button,
  .button {
    width: 100%;
    min-height: 46px;
    justify-content: center;
    text-align: center;
  }

  .hero-media {
    display: none;
  }

  .page-hero {
    min-height: auto;
    padding-top: 42px;
    padding-bottom: 46px;
    background-position: center;
  }

  .page-hero::after {
    right: -180px;
    bottom: -220px;
  }

  .page-hero h1 {
    font-size: clamp(36px, 13vw, 48px);
    line-height: 1.12;
  }

  .direction-tabs,
  .product-jump-nav,
  .page-jump-nav {
    display: flex;
    overflow-x: auto;
    flex-wrap: nowrap;
    justify-content: flex-start;
    gap: 10px;
    padding-top: 14px;
    padding-bottom: 14px;
  }

  .direction-tabs a,
  .product-jump-nav a,
  .page-jump-nav a {
    flex: 0 0 auto;
    min-height: 38px;
    padding: 8px 14px;
    white-space: nowrap;
  }

  .section {
    padding-top: 46px;
    padding-bottom: 52px;
  }

  .section-heading {
    margin-bottom: 24px;
  }

  .section-heading .eyebrow {
    font-size: 12px;
  }

  .feature-grid,
  .product-grid,
  .direction-grid,
  .stats,
  .skeleton-grid,
  .card-grid,
  .card-grid.four,
  .scene-grid,
  .scene-grid.five,
  .article-grid,
  .support-grid,
  .audience-grid,
  .detail-grid,
  .footer-main,
  .footer-links,
  .case-summary-grid,
  .qualification-grid,
  .product-entry-grid,
  .cases-showcase {
    grid-template-columns: 1fr !important;
    gap: 16px;
  }

  .about-grid,
  .contact-panel,
  .contact-layout {
    grid-template-columns: 1fr !important;
    gap: 18px;
  }

  .product-card,
  .direction-card,
  .detail-card,
  .link-card,
  .scene-card,
  .article-card,
  .support-card,
  .audience-card,
  .skeleton-card,
  .product-entry,
  .product-detail,
  .contact-details,
  .contact-form-panel,
  .legal-section {
    padding: 20px;
  }

  .data-table {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .data-table table,
  table {
    min-width: 640px;
  }

  .footer-bottom,
  .footer-bottom span:last-child {
    display: grid;
    gap: 8px;
    text-align: left;
  }
}

@media (max-width: 420px) {
  :root {
    --container-gutter: 16px;
    --container-inline: 16px;
  }

  .hero,
  .page-hero,
  .section {
    padding-left: 16px;
    padding-right: 16px;
  }

  .direction-tabs,
  .product-jump-nav,
  .page-jump-nav {
    margin-left: -16px;
    margin-right: -16px;
    padding-left: 16px;
    padding-right: 16px;
  }

  .page-hero h1,
  .hero h1 {
    word-break: keep-all;
  }
}