:root {
  --bg-deep: #050810;
  --bg-card: rgba(15, 23, 42, 0.72);
  --bg-elevated: rgba(22, 32, 56, 0.88);
  --border: rgba(148, 163, 184, 0.14);
  --text: #e8edf7;
  --text-muted: #94a3b8;
  --accent: #3b82f6;
  --accent-soft: rgba(59, 130, 246, 0.16);
  --accent-glow: rgba(59, 130, 246, 0.35);
  --cyan: #22d3ee;
  --gradient: linear-gradient(135deg, #3b82f6 0%, #22d3ee 55%, #818cf8 100%);
  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  --max-width: 1180px;
  --header-height: 76px;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg-deep);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

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

.container {
  width: min(var(--max-width), calc(100% - 48px));
  margin-inline: auto;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-height);
  backdrop-filter: blur(18px);
  background: rgba(5, 8, 16, 0.72);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--gradient);
  display: grid;
  place-items: center;
  font-size: 0.95rem;
  font-weight: 800;
  color: #04101f;
  box-shadow: 0 8px 28px var(--accent-glow);
}

.logo-text span {
  display: block;
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav a {
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--text-muted);
  font-size: 0.94rem;
  transition: color 0.2s, background 0.2s;
}

.nav a:hover,
.nav a.active {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}

.nav-cta {
  margin-left: 8px;
  padding: 10px 18px !important;
  background: var(--gradient) !important;
  color: #04101f !important;
  font-weight: 700;
}

.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 10px;
  padding: 8px 12px;
  cursor: pointer;
}

.hero {
  position: relative;
  padding: calc(var(--header-height) + 96px) 0 120px;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 18% 20%, rgba(59, 130, 246, 0.22), transparent 34%),
    radial-gradient(circle at 82% 12%, rgba(34, 211, 238, 0.14), transparent 28%),
    radial-gradient(circle at 50% 100%, rgba(129, 140, 248, 0.12), transparent 40%);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--cyan);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 22px 0 18px;
  font-size: clamp(2.4rem, 5vw, 4rem);
  line-height: 1.12;
  letter-spacing: -0.03em;
}

.hero h1 .gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lead {
  font-size: 1.12rem;
  color: var(--text-muted);
  max-width: 620px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}

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

.btn-primary {
  background: var(--gradient);
  color: #04101f;
  box-shadow: 0 12px 36px var(--accent-glow);
}

.btn-secondary {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
}

.hero-panel {
  position: relative;
  padding: 28px;
  border-radius: calc(var(--radius) + 6px);
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.hero-panel::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.45), transparent 40%, rgba(34, 211, 238, 0.35));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.stat {
  padding: 18px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
}

.stat strong {
  display: block;
  font-size: 1.5rem;
  margin-bottom: 4px;
}

.stat span {
  color: var(--text-muted);
  font-size: 0.88rem;
}

.section {
  padding: 96px 0;
}

.section-header {
  max-width: 760px;
  margin-bottom: 48px;
}

.section-header.center {
  margin-inline: auto;
  text-align: center;
}

.section-label {
  color: var(--cyan);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-header h2 {
  margin: 0 0 14px;
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  letter-spacing: -0.02em;
}

.section-header p {
  margin: 0;
  color: var(--text-muted);
  font-size: 1.05rem;
}

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

.card {
  padding: 28px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
  transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(59, 130, 246, 0.35);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: var(--accent-soft);
  color: var(--cyan);
  font-size: 1.25rem;
  margin-bottom: 18px;
}

.card h3 {
  margin: 0 0 10px;
  font-size: 1.15rem;
}

.card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.96rem;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.tag {
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.82rem;
}

.feature-band {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent);
  border-block: 1px solid var(--border);
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.timeline {
  display: grid;
  gap: 18px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 16px;
  align-items: start;
}

.timeline-num {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  background: var(--accent-soft);
  color: var(--cyan);
  font-weight: 800;
}

.timeline-item h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
}

.timeline-item p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.case-card {
  padding: 34px;
  border-radius: calc(var(--radius) + 4px);
  background: linear-gradient(160deg, rgba(22, 32, 56, 0.95), rgba(10, 16, 30, 0.95));
  border: 1px solid rgba(59, 130, 246, 0.22);
  box-shadow: var(--shadow);
}

.case-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}

.case-meta .tag {
  color: var(--text);
}

.case-card h3 {
  margin: 0 0 12px;
  font-size: 1.6rem;
}

.case-card > p {
  color: var(--text-muted);
}

.list-check {
  list-style: none;
  padding: 0;
  margin: 18px 0 0;
  display: grid;
  gap: 12px;
}

.list-check li {
  position: relative;
  padding-left: 28px;
  color: var(--text-muted);
}

.list-check li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--cyan);
  font-weight: 700;
}

.industry-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.industry-item {
  padding: 22px 18px;
  border-radius: var(--radius-sm);
  text-align: center;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  transition: border-color 0.2s, transform 0.2s;
}

.industry-item:hover {
  border-color: rgba(34, 211, 238, 0.35);
  transform: translateY(-2px);
}

.industry-item strong {
  display: block;
  margin-bottom: 6px;
}

.industry-item span {
  color: var(--text-muted);
  font-size: 0.86rem;
}

.contact-section {
  padding-bottom: 120px;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
}

.contact-card {
  padding: 32px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
}

.contact-card h3 {
  margin-top: 0;
}

.qr-box {
  width: 180px;
  height: 180px;
  margin: 0 auto 16px;
  padding: 12px;
  border-radius: 16px;
  background: #fff;
}

.qr-box img,
.qr-placeholder {
  width: 100%;
  height: 100%;
  border-radius: 8px;
}

.qr-placeholder {
  display: grid;
  place-items: center;
  background: #f1f5f9;
  color: #64748b;
  font-size: 0.82rem;
  text-align: center;
  padding: 12px;
}

.contact-list {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}

.contact-item {
  display: flex;
  gap: 14px;
  align-items: center;
  padding: 16px 18px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
}

.contact-item strong {
  display: block;
  margin-bottom: 2px;
}

.contact-item span,
.contact-item a {
  color: var(--text-muted);
  font-size: 0.94rem;
}

.contact-item a:hover {
  color: var(--cyan);
}

.page-hero {
  padding: calc(var(--header-height) + 72px) 0 56px;
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(circle at 20% 0%, rgba(59, 130, 246, 0.16), transparent 35%);
}

.page-hero h1 {
  margin: 12px 0 16px;
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.02em;
}

.page-hero p {
  max-width: 720px;
  color: var(--text-muted);
  font-size: 1.08rem;
}

.breadcrumb {
  color: var(--text-muted);
  font-size: 0.88rem;
}

.breadcrumb a:hover {
  color: var(--cyan);
}

.site-footer {
  padding: 56px 0 32px;
  border-top: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.22);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 32px;
}

.footer-grid h4 {
  margin: 0 0 14px;
  font-size: 0.92rem;
}

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

.footer-grid a,
.footer-grid li {
  color: var(--text-muted);
  font-size: 0.92rem;
}

.footer-grid a:hover {
  color: var(--text);
}

.footer-bottom {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  color: var(--text-muted);
  font-size: 0.86rem;
}

.footer-bottom a {
  color: var(--text-muted);
  transition: color 0.2s;
}

.footer-bottom a:hover {
  color: var(--text);
}

.qr-box img {
  object-fit: contain;
}

@media (max-width: 980px) {
  .hero-grid,
  .split,
  .contact-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

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

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

@media (max-width: 720px) {
  .menu-toggle {
    display: inline-flex;
  }

  .nav {
    position: absolute;
    top: calc(100% + 8px);
    right: 24px;
    left: 24px;
    flex-direction: column;
    align-items: stretch;
    padding: 12px;
    border-radius: var(--radius);
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: 0.2s;
  }

  .nav.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

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

  .hero {
    padding-bottom: 80px;
  }

  .section {
    padding: 72px 0;
  }
}