:root {
  --color-deep-blue: #0a1628;
  --color-mid-blue: #132f4c;
  --color-light-blue: #1e3a5f;
  --color-white: #ffffff;
  --color-off-white: #f6f8fa;
  --color-light-gray: #e2e8f0;
  --color-mid-gray: #94a3b8;
  --color-cool-silver: #cbd5e1;
  --color-electric-blue: #38bdf8;
  --color-cyan: #22d3ee;
  --color-accent: #0ea5e9;
  --gradient-hero: linear-gradient(145deg, #0a1628 0%, #132f4c 40%, #1e3a5f 100%);
  --gradient-overlay: linear-gradient(90deg, rgba(10,22,40,0.96) 0%, rgba(10,22,40,0.75) 100%);
  --glow-blue: 0 0 40px rgba(56,189,248,0.12);
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 8rem;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --duration: 0.4s;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-deep-blue);
  background: var(--color-off-white);
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--duration) var(--ease-out); }
ul { list-style: none; margin: 0; padding: 0; }

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: var(--space-sm) var(--space-lg);
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(226,232,240,0.5);
}
.site-header.scrolled { box-shadow: 0 2px 24px rgba(10,22,40,0.05); }
.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand-logo {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-deep-blue);
  letter-spacing: -0.03em;
}
.nav-list { display: flex; gap: var(--space-lg); flex-wrap: wrap; }
.nav-link { font-size: 0.9rem; color: var(--color-mid-blue); }
.nav-link:hover, .nav-link.active { color: var(--color-accent); }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span { width: 24px; height: 2px; background: var(--color-deep-blue); }

.zone-index {
  position: fixed;
  right: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
  z-index: 999;
}
.zone-index-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
}
.zone-index-label {
  font-size: 0.7rem;
  color: var(--color-mid-gray);
  letter-spacing: 0.1em;
}
.zone-index-item {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-cool-silver);
  border-radius: 50%;
  transition: all var(--duration) var(--ease-out);
}
.zone-index-item:hover {
  color: var(--color-electric-blue);
  background: rgba(56,189,248,0.1);
}
.zone-index-item.active {
  color: var(--color-white);
  background: var(--color-accent);
  box-shadow: var(--glow-blue);
}
@media (max-width: 900px) { .zone-index { display: none; } }

.zone-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-lg);
}
.zone-number {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}
.zone-label {
  display: block;
  font-size: 0.8rem;
  color: var(--color-mid-gray);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: var(--space-xs);
}
.zone-title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  color: var(--color-deep-blue);
  margin: 0 0 var(--space-md);
  letter-spacing: -0.02em;
}
.zone-lead, .zone-desc {
  font-size: 1.05rem;
  color: var(--color-mid-blue);
  line-height: 1.7;
  margin: 0 0 var(--space-lg);
}
.zone-header { margin-bottom: var(--space-xl); }
.zone-header-compact { margin-bottom: var(--space-lg); }
.zone-header-compact .zone-title { margin-bottom: 0; }
.zone-summary {
  max-width: 680px;
  font-size: 1rem;
  color: var(--color-mid-blue);
  line-height: 1.7;
  margin: var(--space-lg) 0 0;
}

.zone-cover {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(72px + var(--space-3xl)) var(--space-lg) var(--space-3xl);
  overflow: hidden;
}
.zone-cover .zone-bg {
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
}
.zone-cover .zone-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--gradient-overlay);
  opacity: 0.55;
}
.zone-cover-inner {
  position: relative;
  max-width: 1280px;
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-2xl);
  align-items: center;
}
.zone-cover-main { color: var(--color-white); }
.zone-cover-main .zone-number { color: var(--color-electric-blue); }
.zone-cover-main .zone-label { color: rgba(255,255,255,0.6); }
.zone-cover-title {
  font-size: clamp(3.5rem, 9vw, 6rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 0.95;
  margin: 0 0 var(--space-sm);
}
.zone-cover-tagline {
  font-size: 1.3rem;
  color: var(--color-cool-silver);
  margin: 0 0 var(--space-md);
}
.zone-cover-text {
  font-size: 1rem;
  color: rgba(255,255,255,0.8);
  max-width: 420px;
  margin: 0 0 var(--space-lg);
  line-height: 1.65;
}
.zone-cover-actions { display: flex; gap: var(--space-md); flex-wrap: wrap; }
.btn-primary {
  display: inline-block;
  padding: 14px 32px;
  background: var(--color-electric-blue);
  color: var(--color-deep-blue);
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius-md);
  transition: all var(--duration) var(--ease-out);
}
.btn-primary:hover {
  background: var(--color-cyan);
  box-shadow: var(--glow-blue);
  transform: translateY(-2px);
}
.btn-outline {
  display: inline-block;
  padding: 14px 32px;
  border: 2px solid rgba(255,255,255,0.45);
  color: var(--color-white);
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius-md);
  transition: all var(--duration) var(--ease-out);
}
.btn-outline:hover {
  border-color: var(--color-electric-blue);
  color: var(--color-electric-blue);
}
.zone-cover-display { position: relative; }
.display-stand {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 32px 80px rgba(0,0,0,0.35);
}
.display-stand img {
  width: 100%;
  aspect-ratio: 2/1;
  object-fit: cover;
  object-position: center;
}
.zone-floats {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.zone-float {
  position: absolute;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.9);
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-sm);
}
.zone-float-icon {
  width: 18px;
  height: 18px;
  opacity: 0.95;
  filter: brightness(0) invert(1);
}
.zone-float:nth-child(1) { top: 22%; right: 12%; }
.zone-float:nth-child(2) { bottom: 38%; left: 8%; }
.zone-float:nth-child(3) { bottom: 12%; right: 22%; }
@media (max-width: 900px) {
  .zone-cover { min-height: auto; padding-top: 100px; }
  .zone-cover-inner { grid-template-columns: 1fr; text-align: center; }
  .zone-cover-text { margin-left: auto; margin-right: auto; }
  .zone-cover-actions { justify-content: center; }
  .zone-floats { display: none; }
}

.zone-brand { background: var(--color-white); }
.zone-panel-split {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: var(--space-2xl);
  align-items: center;
}
.zone-panel-visual { position: relative; }
.panel-frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 16px 48px rgba(10,22,40,0.08);
}
.panel-frame img {
  width: 100%;
  object-fit: cover;
}
.zone-brand .panel-frame img { aspect-ratio: 1/1; }
.zone-download .panel-frame img { aspect-ratio: 4/3; }
.panel-blocks { display: grid; gap: var(--space-md); }
.panel-block {
  position: relative;
  padding: var(--space-md);
  padding-left: calc(var(--space-md) + 36px);
  background: var(--color-off-white);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-electric-blue);
}
.panel-block-icon {
  position: absolute;
  left: var(--space-md);
  top: var(--space-md);
  width: 24px;
  height: 24px;
}
.panel-block-icon img { width: 100%; height: 100%; object-fit: contain; }
.panel-block strong { display: block; color: var(--color-deep-blue); margin-bottom: 4px; }
.panel-block p { margin: 0; font-size: 0.95rem; color: var(--color-mid-blue); line-height: 1.6; }
@media (max-width: 900px) { .zone-panel-split { grid-template-columns: 1fr; } }

.zone-capabilities { background: linear-gradient(180deg, var(--color-off-white) 0%, var(--color-white) 100%); }
.exhibit {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
  margin-bottom: var(--space-2xl);
}
.exhibit-reverse .exhibit-visual { order: 2; }
.exhibit-reverse .exhibit-caption { order: 1; }
.exhibit-visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(10,22,40,0.06);
}
.exhibit-visual img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  object-position: center;
}
.exhibit-caption h3 {
  font-size: 1.4rem;
  color: var(--color-deep-blue);
  margin: 0 0 var(--space-sm);
}
.exhibit-caption p { margin: 0; color: var(--color-mid-blue); line-height: 1.65; }
.exhibit-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}
.exhibit-card {
  padding: var(--space-lg);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-light-gray);
  transition: all var(--duration) var(--ease-out);
}
.exhibit-card:hover {
  border-color: var(--color-electric-blue);
  box-shadow: 0 8px 32px rgba(14,165,233,0.08);
  transform: translateY(-3px);
}
.exhibit-card-icon {
  width: 44px;
  height: 44px;
  margin-bottom: var(--space-md);
}
.exhibit-card-icon img { width: 100%; height: 100%; object-fit: contain; }
.exhibit-card h4 { font-size: 1.1rem; color: var(--color-deep-blue); margin: 0 0 var(--space-sm); }
.exhibit-card p { margin: 0; font-size: 0.95rem; color: var(--color-mid-blue); line-height: 1.55; }
@media (max-width: 900px) {
  .exhibit, .exhibit-reverse { grid-template-columns: 1fr; }
  .exhibit-reverse .exhibit-visual, .exhibit-reverse .exhibit-caption { order: unset; }
  .exhibit-row { grid-template-columns: 1fr; }
}

.zone-download {
  background: var(--color-mid-blue);
  color: var(--color-white);
}
.zone-download .zone-number { color: var(--color-electric-blue); }
.zone-download .zone-label { color: rgba(255,255,255,0.6); }
.zone-download .zone-title { color: var(--color-white); }
.zone-download .zone-lead { color: var(--color-cool-silver); }
.zone-panel-inverted {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-2xl);
  align-items: start;
}
.zone-panel-inverted .zone-panel-visual { order: 2; }
.zone-panel-inverted .zone-panel-content { order: 1; }
.download-info-blocks { display: grid; gap: var(--space-md); }
.download-info-block {
  position: relative;
  padding: var(--space-md);
  padding-left: calc(var(--space-md) + 32px);
  background: rgba(255,255,255,0.05);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255,255,255,0.08);
}
.download-block-icon {
  position: absolute;
  left: var(--space-md);
  top: var(--space-md);
  width: 22px;
  height: 22px;
}
.download-block-icon img { width: 100%; height: 100%; object-fit: contain; opacity: 0.9; }
.download-info-block h4 {
  font-size: 0.95rem;
  color: var(--color-electric-blue);
  margin: 0 0 var(--space-sm);
}
.download-info-block p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-cool-silver);
  line-height: 1.6;
}
.zone-download .panel-frame {
  position: sticky;
  top: 100px;
  box-shadow: 0 20px 56px rgba(0,0,0,0.25);
}
@media (max-width: 900px) {
  .zone-panel-inverted { grid-template-columns: 1fr; }
  .zone-panel-inverted .zone-panel-visual,
  .zone-panel-inverted .zone-panel-content { order: unset; }
  .zone-download .panel-frame { position: static; }
}

.zone-advantages { background: var(--color-white); }
.advantages-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}
.advantage-chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 24px;
  background: var(--color-off-white);
  border: 1px solid var(--color-light-gray);
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--color-deep-blue);
  transition: all var(--duration) var(--ease-out);
}
.advantage-chip .chip-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}
.advantage-chip:hover {
  background: linear-gradient(135deg, rgba(14,165,233,0.06), rgba(56,189,248,0.04));
  border-color: var(--color-electric-blue);
  color: var(--color-accent);
}

.zone-security { background: var(--color-off-white); }
.panel-frame-dark { box-shadow: 0 16px 48px rgba(10,22,40,0.12); }
.zone-security .panel-frame img {
  aspect-ratio: 4/5;
  object-fit: cover;
  object-position: center top;
}
.security-items { display: grid; gap: var(--space-sm); margin: 0; padding: 0; }
.security-items li {
  padding: var(--space-md);
  background: var(--color-white);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-mid-gray);
  font-size: 0.95rem;
  color: var(--color-mid-blue);
  line-height: 1.55;
}
.security-items li strong { display: block; color: var(--color-deep-blue); margin-bottom: 2px; }

.zone-scenarios { background: var(--color-white); }
.scenario-stands {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}
.scenario-stand {
  background: var(--color-off-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-light-gray);
  transition: all var(--duration) var(--ease-out);
}
.scenario-stand:hover {
  border-color: var(--color-electric-blue);
  box-shadow: 0 8px 32px rgba(14,165,233,0.06);
}
.scenario-stand-wide { grid-column: span 2; }
.scenario-visual { aspect-ratio: 16/9; overflow: hidden; }
.scenario-visual img { width: 100%; height: 100%; object-fit: cover; }
.scenario-text { padding: var(--space-md); }
.scenario-stand-text-only .scenario-text { padding: var(--space-lg); }
.scenario-icon {
  display: inline-block;
  width: 32px;
  height: 32px;
  margin-bottom: var(--space-sm);
}
.scenario-icon img { width: 100%; height: 100%; object-fit: contain; }
.scenario-text h4 { font-size: 1.05rem; color: var(--color-deep-blue); margin: 0 0 var(--space-xs); }
.scenario-text p { margin: 0; font-size: 0.95rem; color: var(--color-mid-blue); line-height: 1.55; }
@media (max-width: 900px) {
  .scenario-stands { grid-template-columns: 1fr; }
  .scenario-stand-wide { grid-column: span 1; }
}

.zone-ui {
  background: var(--color-deep-blue);
  color: var(--color-white);
}
.zone-header-light .zone-number { color: var(--color-electric-blue); }
.zone-header-light .zone-label { color: rgba(255,255,255,0.6); }
.zone-header-light .zone-title { color: var(--color-white); }
.ui-wall {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  grid-template-rows: auto auto;
  gap: var(--space-lg);
  align-items: end;
}
.ui-slot {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(0,0,0,0.4);
  transition: transform var(--duration) var(--ease-out);
}
.ui-slot:hover { transform: translateY(-6px); }
.ui-slot-primary { grid-row: span 2; align-self: stretch; }
.ui-slot-primary img {
  width: 100%;
  height: 100%;
  min-height: 360px;
  aspect-ratio: 4/3;
  object-fit: cover;
  object-position: center;
}
.ui-slot:not(.ui-slot-primary) img {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  object-position: center;
}
@media (max-width: 900px) {
  .ui-wall { grid-template-columns: 1fr; grid-template-rows: auto; }
  .ui-slot-primary { grid-row: span 1; }
  .ui-slot-primary img { min-height: 260px; }
}

.zone-faq { background: var(--color-off-white); }
.faq-board { display: grid; gap: var(--space-sm); }
.faq-item {
  background: var(--color-white);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-light-gray);
  overflow: hidden;
  transition: border-color var(--duration);
}
.faq-item:hover { border-color: var(--color-electric-blue); }
.faq-trigger {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  background: none;
  border: none;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-deep-blue);
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq-trigger:hover { background: var(--color-off-white); }
.faq-trigger::after {
  content: "+";
  font-size: 1.4rem;
  color: var(--color-mid-gray);
  flex-shrink: 0;
  margin-left: var(--space-sm);
  transition: transform var(--duration);
}
.faq-item.active .faq-trigger::after { transform: rotate(45deg); }
.faq-panel { max-height: 0; overflow: hidden; transition: max-height var(--duration) var(--ease-out); }
.faq-item.active .faq-panel { max-height: 500px; }
.faq-panel p {
  margin: 0;
  padding: var(--space-md) var(--space-lg) var(--space-md);
  font-size: 0.95rem;
  color: var(--color-mid-blue);
  line-height: 1.7;
}

.zone-contact { background: var(--color-white); }
.contact-board { max-width: 640px; }
.contact-intro {
  font-size: 1.05rem;
  color: var(--color-mid-blue);
  margin: 0 0 var(--space-lg);
  line-height: 1.65;
}
.contact-grid { display: grid; gap: var(--space-md); margin-bottom: var(--space-lg); }
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--color-off-white);
  border-radius: var(--radius-md);
}
.contact-item strong { display: block; color: var(--color-deep-blue); margin-bottom: 2px; }
.contact-item p { margin: 0; font-size: 0.95rem; color: var(--color-mid-blue); }
.contact-icon { width: 24px; height: 24px; flex-shrink: 0; }
.contact-note {
  font-size: 0.9rem;
  color: var(--color-mid-gray);
  line-height: 1.6;
  margin: 0;
}

.site-footer {
  background: var(--color-deep-blue);
  color: var(--color-cool-silver);
  padding: var(--space-2xl) var(--space-lg);
}
.footer-inner {
  max-width: 1180px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.6fr 0.8fr 1.6fr;
  gap: var(--space-xl);
}
.footer-logo {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-white);
  display: block;
  margin-bottom: var(--space-sm);
}
.footer-desc {
  font-size: 0.9rem;
  line-height: 1.6;
  margin: 0;
  max-width: 340px;
}
.footer-nav h4 { font-size: 1rem; color: var(--color-white); margin: 0 0 var(--space-sm); }
.footer-nav ul { display: flex; flex-direction: column; gap: var(--space-xs); }
.footer-nav a { color: var(--color-cool-silver); font-size: 0.9rem; }
.footer-nav a:hover { color: var(--color-electric-blue); }
.footer-statement { font-size: 0.85rem; line-height: 1.6; margin: 0; }
.footer-links { font-size: 0.9rem; margin: var(--space-sm) 0 0; }
.footer-links a { color: var(--color-electric-blue); }
.footer-links a:hover { text-decoration: underline; }
.footer-copy { font-size: 0.85rem; margin: var(--space-sm) 0 0; color: var(--color-mid-gray); }
.footer-icp { opacity: 0.85; }
@media (max-width: 900px) { .footer-inner { grid-template-columns: 1fr; } }

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed;
    top: 0; right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--color-white);
    box-shadow: -4px 0 24px rgba(0,0,0,0.08);
    padding: 72px var(--space-md) var(--space-lg);
    transition: right var(--duration) var(--ease-out);
  }
  .main-nav.open { right: 0; }
  .nav-list { flex-direction: column; gap: 0; }
  .nav-link { display: block; padding: var(--space-md); border-bottom: 1px solid var(--color-light-gray); }
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s var(--ease-out), transform 0.5s var(--ease-out);
}
.reveal.visible { opacity: 1; transform: translateY(0); }