:root {
  --bg: #f5f7fb;
  --bg-alt: #f0f4ff;
  --surface: #ffffff;
  --surface-soft: rgba(255, 255, 255, 0.85);
  --border-soft: rgba(148, 163, 184, 0.35);
  --accent: #2563eb;
  --accent-soft: rgba(37, 99, 235, 0.12);
  --accent-strong: #1d4ed8;
  --accent-gradient: linear-gradient(135deg, #38bdf8, #2563eb);
  --text: #0f172a;
  --text-soft: #4b5563;
  --text-muted: #9ca3af;
  --radius-lg: 18px;
  --radius-xl: 28px;
  --radius-pill: 999px;
  --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.8);
  --shadow-subtle: 0 8px 24px rgba(15, 23, 42, 0.8);
  --blur: 18px;
  --transition-fast: 160ms ease-out;
  --transition-med: 220ms ease-out;
}

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

html,
body {
  margin: 0;
  padding: 0;
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'SF Pro Text',
    'Segoe UI', sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top, #e0f2fe 0, #f5f7fb 55%, #f5f7fb 100%);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

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

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

button,
input,
select,
textarea {
  font-family: inherit;
}

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(var(--blur));
  background: linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.96),
    rgba(255, 255, 255, 0.9),
    rgba(255, 255, 255, 0.8)
  );
  border-bottom: 1px solid rgba(148, 163, 184, 0.22);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  width: 80px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.15),
    0 1px 2px rgba(148, 163, 184, 0.1);
  overflow: hidden;
  position: relative;
  background: #ffffff;
}

.brand-logo-canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.brand-subtitle {
  font-size: 11px;
  color: var(--text-soft);
}

.nav {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
}

.lang-switcher {
  position: relative;
}

.lang-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 20px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  background: rgba(255, 255, 255, 0.95);
  color: #1e293b;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.lang-btn:hover {
  background: #ffffff;
  border-color: var(--accent);
}

.lang-arrow {
  font-size: 10px;
  transition: transform var(--transition-fast);
}

.lang-switcher.active .lang-arrow {
  transform: rotate(180deg);
}

.lang-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  min-width: 140px;
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.3);
  background: #ffffff;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.15);
  padding: 6px;
  opacity: 0;
  transform: translateY(-4px);
  pointer-events: none;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  z-index: 50;
}

.lang-menu.is-open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.lang-option {
  display: block;
  width: 100%;
  padding: 8px 12px;
  border-radius: 8px;
  border: none;
  background: transparent;
  color: #1e293b;
  font-size: 13px;
  text-align: left;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.lang-option:hover {
  background: rgba(56, 189, 248, 0.1);
}

.lang-option[data-lang="zh-CN"]:hover,
.lang-option[data-lang="zh-TW"]:hover,
.lang-option[data-lang="en"]:hover {
  background: rgba(56, 189, 248, 0.15);
}

.nav-list {
  list-style: none;
  display: flex;
  gap: 26px;
  padding: 0;
  margin: 0;
}

.nav-list a {
  font-size: 14px;
  color: var(--text-soft);
  position: relative;
  padding-bottom: 2px;
  transition: color var(--transition-fast);
}

.nav-list a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 1.5px;
  border-radius: 999px;
  background: var(--accent-gradient);
  transition: width var(--transition-med);
}

.nav-list a:hover,
.nav-list a:focus-visible {
  color: var(--text);
}

.nav-list a:hover::after,
.nav-list a:focus-visible::after,
.nav-list a.is-active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  width: 34px;
  height: 34px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.6);
  background: rgba(255, 255, 255, 0.95);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 16px;
  height: 1.5px;
  border-radius: 999px;
  background: #0f172a;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle[aria-expanded='true'] span:first-child {
  transform: translateY(2.5px) rotate(45deg);
}

.nav-toggle[aria-expanded='true'] span:last-child {
  transform: translateY(-2.5px) rotate(-45deg);
}

.hero {
  padding: 54px 0 64px;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 40px;
  align-items: center;
}

.hero-copy h1 {
  font-size: clamp(32px, 4vw, 42px);
  line-height: 1.1;
  letter-spacing: 0.01em;
  margin: 0 0 14px;
}

.hero-lead {
  margin: 0 0 22px;
  color: var(--text-soft);
  font-size: 15px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-size: 14px;
  cursor: pointer;
  transition: transform var(--transition-fast),
    box-shadow var(--transition-fast), background var(--transition-fast),
    border-color var(--transition-fast), color var(--transition-fast);
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff;
  font-weight: 600;
  box-shadow: 0 10px 24px rgba(56, 189, 248, 0.35);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 38px rgba(56, 189, 248, 0.5);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.9);
  color: var(--text-soft);
  border-color: rgba(148, 163, 184, 0.6);
}

.btn-ghost:hover {
  border-color: var(--accent-strong);
  background: rgba(219, 234, 254, 0.9);
}

.btn-full {
  width: 100%;
}

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

.hero-metrics dt {
  font-size: 18px;
  font-weight: 600;
}

.hero-metrics dd {
  margin: 4px 0 0;
  font-size: 12px;
  color: var(--text-soft);
}

.hero-visual {
  position: relative;
  min-height: 280px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.hero-card {
  border-radius: var(--radius-xl);
  border: 1px solid rgba(148, 163, 184, 0.25);
  background: radial-gradient(circle at top left, rgba(56, 189, 248, 0.12), transparent),
    radial-gradient(circle at bottom right, rgba(129, 140, 248, 0.1), transparent),
    #ffffff;
  box-shadow: 0 8px 24px rgba(148, 163, 184, 0.2),
    0 2px 8px rgba(148, 163, 184, 0.1);
  transition: transform var(--transition-med), box-shadow var(--transition-med);
}

.hero-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(148, 163, 184, 0.25),
    0 4px 12px rgba(148, 163, 184, 0.15);
}

.hero-card-main {
  padding: 24px 22px 22px;
  flex: 1;
}

.hero-card-main h2 {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 600;
  color: #1e293b;
  line-height: 1.3;
}

.hero-card-main p {
  margin: 0 0 14px;
  font-size: 13px;
  color: #64748b;
  line-height: 1.6;
}

.hero-card-main ul {
  margin: 0;
  padding-left: 20px;
  font-size: 13px;
  color: #334155;
  line-height: 1.6;
}

.hero-card-main li {
  margin-bottom: 6px;
}

.hero-card-main li:last-child {
  margin-bottom: 0;
}

.hero-card-secondary {
  padding: 18px 20px 16px;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.08), rgba(129, 140, 248, 0.05)),
    #ffffff;
  border-color: rgba(56, 189, 248, 0.3);
}

.hero-card-secondary h3 {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 600;
  color: #1e293b;
}

.hero-card-secondary p {
  margin: 0 0 10px;
  font-size: 12px;
  color: #64748b;
}

.hero-kpi-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.hero-kpi-list span {
  font-size: 12px;
  padding: 6px 12px;
  border-radius: 20px;
  border: 1px solid rgba(56, 189, 248, 0.3);
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.1), rgba(129, 140, 248, 0.08));
  color: #1e40af;
  font-weight: 500;
}

.section {
  padding: 52px 0 60px;
}

.section-alt {
  background: radial-gradient(circle at top, #e0f2fe, #eef2ff);
}

.section-header {
  text-align: center;
  max-width: 620px;
  margin: 0 auto 30px;
}

.section-header-left {
  text-align: left;
  margin-left: 0;
}

.section-header h2 {
  margin: 0 0 10px;
  font-size: 24px;
}

.section-header p {
  margin: 0;
  color: var(--text-soft);
  font-size: 14px;
  line-height: 1.7;
}

.grid {
  display: grid;
  gap: 20px;
}

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

.card {
  border-radius: var(--radius-lg);
  border: 1px solid rgba(148, 163, 184, 0.5);
  background: linear-gradient(
      145deg,
      #ffffff,
      #f9fafb,
      #ffffff
    ),
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.09), transparent);
  padding: 20px 18px 18px;
  box-shadow: 0 14px 30px rgba(148, 163, 184, 0.35);
  transition: transform var(--transition-med), box-shadow var(--transition-med),
    border-color var(--transition-med), background var(--transition-med);
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(37, 99, 235, 0.7);
  box-shadow: 0 22px 45px rgba(148, 163, 184, 0.45);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.card p {
  margin: 0 0 10px;
  font-size: 13px;
  color: var(--text-soft);
}

.card ul {
  margin: 0;
  padding-left: 18px;
  font-size: 12px;
  color: var(--text);
}

.card-tight {
  padding: 16px 16px 14px;
}

.solutions-grid .card {
  min-height: 210px;
}

.product-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.9fr);
  gap: 22px;
  align-items: flex-start;
}

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

.pillars-column {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.product-highlight {
  border-radius: var(--radius-lg);
  padding: 18px 16px 16px;
  border: 1px solid rgba(37, 99, 235, 0.6);
  background: radial-gradient(circle at top, rgba(219, 234, 254, 0.9), #ffffff);
  box-shadow: 0 16px 40px rgba(148, 163, 184, 0.4);
}

.product-highlight h3 {
  margin: 0 0 10px;
  font-size: 15px;
}

.product-highlight ul {
  margin: 0;
  padding-left: 18px;
  font-size: 13px;
  color: var(--text);
}

.cases-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.9fr);
  gap: 22px;
  align-items: flex-start;
}

.cases-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.case-card {
  border-radius: var(--radius-lg);
  border: 1px solid rgba(148, 163, 184, 0.5);
  padding: 18px 16px 16px;
  background: #ffffff;
}

.case-card h3 {
  margin: 0 0 6px;
  font-size: 15px;
}

.case-card p {
  margin: 0 0 8px;
  font-size: 13px;
  color: var(--text-soft);
}

.case-card ul {
  margin: 0;
  padding-left: 18px;
  font-size: 12px;
}

.cases-stats {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.stats-card {
  border-radius: var(--radius-lg);
  border: 1px dashed rgba(148, 163, 184, 0.7);
  padding: 11px 13px;
  background: linear-gradient(
    135deg,
    #ffffff,
    #eff6ff
  );
}

.stats-label {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.stats-value {
  font-size: 13px;
}

.about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  gap: 24px;
  align-items: flex-start;
}

.about-layout p {
  font-size: 14px;
  color: var(--text-soft);
  line-height: 1.8;
}

.about-aside {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.about-badge {
  border-radius: var(--radius-lg);
  border: 1px solid rgba(37, 99, 235, 0.45);
  background: radial-gradient(circle at top left, rgba(191, 219, 254, 0.8), transparent),
    #ffffff;
  padding: 14px 13px 12px;
}

.badge-title {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(37, 99, 235, 0.7);
  margin-bottom: 8px;
}

.about-badge ul {
  margin: 0;
  padding-left: 18px;
  font-size: 13px;
  color: var(--text);
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1.1fr);
  gap: 24px;
  align-items: flex-start;
}

.contact-info {
  list-style: none;
  padding: 0;
  margin: 18px 0 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.contact-label {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
}

.contact-value {
  font-size: 13px;
}

.contact-value-canvas {
  display: inline-block;
  vertical-align: middle;
  height: auto;
}

.contact-card {
  border-radius: 22px;
  border: 1px solid rgba(37, 99, 235, 0.6);
  background: radial-gradient(circle at top, rgba(219, 234, 254, 0.9), #ffffff);
  padding: 18px 16px 16px;
  box-shadow: 0 18px 40px rgba(148, 163, 184, 0.45);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.form-field label {
  font-size: 12px;
  color: var(--text-muted);
}

.form-field input,
.form-field select,
.form-field textarea {
  padding: 7px 9px;
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.7);
  background: rgba(255, 255, 255, 0.98);
  color: var(--text);
  font-size: 13px;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast),
    background var(--transition-fast);
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  border-color: var(--accent-strong);
  box-shadow: 0 0 0 1px rgba(56, 189, 248, 0.4);
}

.form-field textarea {
  resize: vertical;
  min-height: 90px;
}

.form-tip {
  margin: 0;
  font-size: 11px;
  color: var(--text-muted);
}

.form-success {
  margin: 6px 0 0;
  font-size: 12px;
  color: #4ade80;
}

.form-error {
  margin: 6px 0 0;
  font-size: 12px;
  color: #ef4444;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

.site-footer {
  border-top: 1px solid rgba(148, 163, 184, 0.35);
  padding: 18px 0 24px;
  margin-top: 30px;
  background: radial-gradient(circle at top, #e0f2fe, #f5f7fb);
  position: relative;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
}

.footer-slogan {
  font-size: 11px;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 18px;
  font-size: 12px;
  color: var(--text-soft);
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-meta {
  font-size: 11px;
  color: var(--text-muted);
}

.back-to-top {
  position: fixed;
  right: 18px;
  bottom: 22px;
  width: 34px;
  height: 34px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.7);
  background: rgba(255, 255, 255, 0.98);
  color: #0f172a;
  font-size: 16px;
  display: none;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 16px 30px rgba(15, 23, 42, 0.95);
}

.back-to-top.is-visible {
  display: flex;
}

@media (max-width: 960px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 26px;
  }

  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .product-layout,
  .cases-layout,
  .about-layout,
  .contact-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .product-highlight {
    order: -1;
  }
}

@media (max-width: 768px) {
  .header-inner {
    padding-inline: 16px;
  }

  .nav {
    gap: 10px;
  }

  .lang-btn {
    padding: 5px 10px;
    font-size: 12px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-list {
    position: absolute;
    right: 0;
    top: calc(100% + 10px);
    flex-direction: column;
    gap: 10px;
    padding: 10px 14px;
    border-radius: 16px;
    border: 1px solid rgba(148, 163, 184, 0.6);
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 18px 40px rgba(148, 163, 184, 0.6);
    min-width: 170px;
    opacity: 0;
    transform: translateY(-4px);
    pointer-events: none;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
  }

  .nav-list.is-open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .hero {
    padding-top: 32px;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-visual {
    order: -1;
    min-height: auto;
  }

  .hero-card-main {
    padding: 20px 18px 18px;
  }

  .hero-card-main h2 {
    font-size: 16px;
  }

  .hero-card-secondary {
    padding: 16px 18px 14px;
  }

  .hero-card-secondary h3 {
    font-size: 14px;
  }

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

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

  .section {
    padding-inline: 16px;
  }

  .contact-card {
    border-radius: 18px;
  }
}

@media (max-width: 540px) {
  .hero-copy h1 {
    font-size: 26px;
  }

  .hero-metrics {
    grid-template-columns: minmax(0, 1fr);
  }

  .form-row {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}