/* ===== 基础重置（替代 tailwind preflight） ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; border: 0 solid; }
html { -webkit-text-size-adjust: 100%; line-height: 1.5; tab-size: 4; }
body { line-height: inherit; }
h1, h2, h3, h4, h5, h6, p, ul, ol, figure, blockquote { margin: 0; }
ul, ol { list-style: none; }
a { color: inherit; text-decoration: inherit; }
img, svg, video, canvas { display: block; vertical-align: middle; max-width: 100%; }
button, input, textarea, select { font: inherit; color: inherit; background: none; }
button { cursor: pointer; }
strong { font-weight: 700; }

:root {
  --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-family-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", "Courier New", monospace;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

:root {
  --fu-bg-0: #1E293B;
  --fu-bg-1: #334155;
  --fu-bg-2: #0F172A;
  --fu-bg-3: #1E3A5F;
  --fu-bg-4: #0F172A;
  --fu-bg-light: #1E293B;
  --fu-ink-0: #FFFFFF;
  --fu-ink-1: #F1F5F9;
  --fu-ink-2: #94A3B8;
  --fu-ink-3: #64748B;
  --fu-accent-a: #0EA5E9;
  --fu-accent-b: #3B82F6;
  --fu-accent-c: #06B6D4;
  --fu-accent-d: #60A5FA;
  --fu-gradient: linear-gradient(135deg, #0EA5E9 0%, #3B82F6 50%, #06B6D4 100%);
  --fu-gradient-2: linear-gradient(135deg, #3B82F6 0%, #06B6D4 50%, #0EA5E9 100%);
  --fu-card: rgba(255,255,255,0.08);
  --fu-card-border: rgba(59,130,246,0.2);
}

* { box-sizing: border-box; }

html, body, #root {
  margin: 0;
  padding: 0;
  height: auto;
  min-height: 100%;
  font-family: var(--font-family-base);
  background: var(--fu-bg-0);
  color: var(--fu-ink-0);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body {
  scroll-behavior: smooth;
}

button { font-family: inherit; }

.fu-container {
  width: min(1280px, 100% - 80px);
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.fu-gradient-text {
  background: var(--fu-gradient);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  animation: fu-flow 5s ease infinite;
}

.fu-gradient-text-2 {
  background: var(--fu-gradient-2);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  animation: fu-flow 5s ease infinite;
}

@keyframes fu-flow {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

@keyframes fu-bounce {
  0%, 100% { transform: translateY(0); opacity: 1; }
  50% { transform: translateY(10px); opacity: .3; }
}

[data-reveal] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .6s ease, transform .6s ease;
}

[data-reveal].in-view {
  opacity: 1;
  transform: translateY(0);
}

/* ============ NAV ============ */
.fu-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 24px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between; 
  pointer-events: none;
  transition: background .3s;
}

.fu-nav.is-scrolled {
  background: rgba(30, 41, 59, 0.9);
  backdrop-filter: blur(20px);
}

.fu-nav > * {
  pointer-events: auto;
}

.fu-nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.fu-nav-logo-mark {
  width: 40px;
  height: 40px;
  display: block;
  object-fit: contain;
}

.fu-nav-logo-text {
  font-size: 17px;
  font-weight: 700;
  color: var(--fu-ink-0);
}

.fu-nav-logo-sub {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--fu-ink-2);
}

.fu-nav-menu {
  display: flex;
  gap: 32px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.fu-nav-menu a {
  font-size: 14px;
  font-weight: 500;
  color: var(--fu-ink-1);
  text-decoration: none;
  transition: color .2s;
}

.fu-nav-menu a:hover {
  color: var(--fu-ink-0);
}

.fu-nav-btn {
  padding: 10px 22px;
  border-radius: 999px;
  background: var(--fu-gradient);
  background-size: 200% 200%;
  animation: fu-flow 5s ease infinite;
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  text-decoration: none;
  box-shadow: 0 8px 28px rgba(192, 132, 252, .4);
  transition: transform .2s;
}

.fu-nav-btn:hover {
  transform: translateY(-2px);
}

/* ============ MEGA MENU ============ */
.fu-nav.is-mega-open {
  background: rgba(30, 41, 59, 0.92);
  backdrop-filter: blur(20px);
}

.fu-nav-item {
  position: relative;
}

.fu-nav-item.is-active > a {
  color: var(--fu-accent-a);
}

.fu-nav-item.is-active::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: -8px;
  width: 20px;
  height: 2px;
  transform: translateX(-50%);
  border-radius: 2px;
  background: var(--fu-gradient);
}

.fu-mega {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  pointer-events: auto;
  background: rgba(15, 23, 42, 0.96);
  backdrop-filter: blur(24px);
  border-top: 1px solid rgba(59, 130, 246, 0.18);
  border-bottom: 1px solid rgba(59, 130, 246, 0.25);
  box-shadow: 0 30px 60px rgba(2, 6, 23, 0.6);
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height .35s cubic-bezier(.4, 0, .2, 1), opacity .3s ease;
}

.fu-mega.is-open {
  max-height: 460px;
  opacity: 1;
}

.fu-mega-inner {
  position: relative;
  width: min(1280px, 100% - 80px);
  margin: 0 auto;
  height: 380px;
}

.fu-mega-panel {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: 1.15fr 1fr 0.85fr;
  gap: 48px;
  align-items: center;
  padding: 40px 0;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .3s ease, transform .35s ease;
  pointer-events: none;
}

.fu-mega-panel.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.fu-mega-tag {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--fu-accent-c);
  margin-bottom: 14px;
}

.fu-mega-title {
  font-size: 28px;
  font-weight: 800;
  margin: 0 0 16px;
  background: var(--fu-gradient);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: fu-flow 5s ease infinite;
}

.fu-mega-desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--fu-ink-2);
  margin: 0;
  max-width: 380px;
}

.fu-mega-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.fu-mega-links a {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 16px;
  border-radius: 12px;
  text-decoration: none;
  color: var(--fu-ink-1);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background .2s, color .2s, transform .2s;
}

.fu-mega-links a:hover {
  background: rgba(59, 130, 246, 0.12);
  color: var(--fu-ink-0);
  transform: translateX(6px);
}

.fu-mega-link-idx {
  font-size: 11px;
  font-weight: 700;
  color: var(--fu-accent-b);
  font-family: ui-monospace, monospace;
  opacity: 0.8;
}

.fu-mega-link-label {
  flex: 1;
}

.fu-mega-link-arrow {
  font-size: 13px;
  color: var(--fu-accent-c);
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity .2s, transform .2s;
}

.fu-mega-links a:hover .fu-mega-link-arrow {
  opacity: 1;
  transform: translateX(0);
}

.fu-mega-visual {
  position: relative;
  height: 260px;
  border-radius: 20px;
  overflow: hidden;
  background:
    radial-gradient(ellipse 70% 60% at 30% 30%, rgba(14, 165, 233, 0.35), transparent 65%),
    radial-gradient(ellipse 60% 50% at 75% 75%, rgba(6, 182, 212, 0.3), transparent 60%),
    linear-gradient(160deg, #1E3A5F 0%, #0F172A 100%);
  border: 1px solid rgba(59, 130, 246, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
}

.fu-mega-visual-icon {
  font-size: 72px;
  filter: drop-shadow(0 0 24px rgba(14, 165, 233, 0.6));
  position: relative;
  z-index: 2;
}
.fu-mega-visual-icon:has(img) { filter: none; }
img.fu-mega-icon-img { width: 300px; height: 175px; object-fit: contain; display: block; }
.fu-mega-visual:has(img.fu-mega-icon-img) { background: none; border: none; }
.fu-mega-visual:has(img.fu-mega-icon-img) .fu-mega-visual-grid,
.fu-mega-visual:has(img.fu-mega-icon-img) .fu-mega-visual-glow { display: none; }

.fu-mega-visual-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(59, 130, 246, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 130, 246, 0.12) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, #000 30%, transparent 75%);
}

.fu-mega-visual-glow {
  position: absolute;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.35), transparent 70%);
  filter: blur(20px);
  animation: fu-mega-pulse 3s ease-in-out infinite;
}

@keyframes fu-mega-pulse {
  0%, 100% { transform: scale(1); opacity: 0.7; }
  50% { transform: scale(1.25); opacity: 1; }
}

/* ============ HERO ============ */
.fu-hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 60% at 20% 30%, rgba(59,130,246,.35), transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 70%, rgba(6,182,212,.3), transparent 60%),
    radial-gradient(ellipse 50% 50% at 50% 50%, rgba(14,165,233,.25), transparent 70%),
    linear-gradient(180deg, #1E293B 0%, #334155 40%, #1E3A5F 100%);
}

.fu-hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
}

.fu-hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  padding: 0 40px;
  margin-bottom: 120px;
}

.fu-hero-tag {
  display: inline-block;
  padding: 10px 22px;
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  backdrop-filter: blur(12px);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--fu-ink-1);
  margin-bottom: 36px;
}

.fu-hero-title {
  font-size: clamp(56px, 9vw, 140px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.03em;
  margin: 0 0 28px;
  color: var(--fu-ink-0);
}

.fu-hero-title .accent {
  display: block;
  margin-top: 8px;
}

.fu-hero-title-img {
  display: block;
  width: clamp(300px, 52vw, 736px);
  height: auto;
  margin: 0 auto;
}

.fu-hero-sub {
  font-size: 19px;
  line-height: 1.7;
  color: var(--fu-ink-2);
  max-width: 640px;
  margin: 0 auto 48px;
}

.fu-hero-actions {
  display: flex;
  justify-content: center;
  gap: 20px;
}

.fu-btn-primary {
  padding: 18px 36px;
  border-radius: 999px;
  background: var(--fu-gradient);
  background-size: 200% 200%;
  animation: fu-flow 5s ease infinite;
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  text-decoration: none;
  box-shadow: 0 12px 40px rgba(192, 132, 252, .5);
  transition: transform .2s;
}

.fu-btn-primary:hover {
  transform: translateY(-3px);
}

.fu-btn-ghost {
  padding: 18px 36px;
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(12px);
  color: var(--fu-ink-0);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid rgba(255,255,255,0.15);
  cursor: pointer;
  text-decoration: none;
  transition: all .2s;
}

.fu-btn-ghost:hover {
  background: rgba(255,255,255,0.1);
  transform: translateY(-3px);
}

.fu-btn-outline {
  padding: 18px 36px;
  border-radius: 999px;
  background: transparent;
  color: var(--fu-ink-0);
  font-size: 15px;
  font-weight: 600;
  border: 2px solid rgba(192, 132, 252, 0.6);
  cursor: pointer;
  text-decoration: none;
  transition: all .3s;
}

.fu-btn-outline:hover {
  background: var(--fu-gradient);
  background-size: 200% 200%;
  animation: fu-flow 5s ease infinite;
  color: #fff;
  border-color: transparent;
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(192, 132, 252, .5);
}

.fu-hero-bottom {
  position: absolute;
  bottom: 48px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.fu-hero-stats {
  display: flex;
  gap: 48px;
}

.fu-hero-stat .num {
  font-size: 32px;
  font-weight: 900;
}

.fu-hero-stat .lbl {
  font-size: 12px;
  color: var(--fu-ink-2);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 4px;
}

.fu-scroll-hint {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fu-ink-2);
}

.fu-scroll-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--fu-ink-2);
  animation: fu-bounce 2s ease infinite;
}

/* ============ TRUSTED BY ============ */
.fu-trusted {
  background: var(--fu-bg-light);
  padding: 60px 0;
  border-top: 1px solid rgba(59,130,246,0.1);
}

.fu-trusted-label {
  text-align: center;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--fu-accent-b);
  margin-bottom: 32px;
}

.fu-trusted-logos {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
}

.fu-partner-logo {
  padding: 16px 20px;
  border-radius: 16px;
  background: rgba(59,130,246,0.08);
  border: 1px solid rgba(59,130,246,0.15);
  text-align: center;
  font-size: 14px;
  font-weight: 600;
  color: var(--fu-ink-1);
}

/* ============ SECTION HEADER ============ */
.fu-section {
  padding: 100px 0;
  position: relative;
}

.fu-section-dark {
  background: linear-gradient(180deg, #334155 0%, var(--fu-bg-0) 100%);
}

.fu-section-head {
  text-align: center;
  margin-bottom: 60px;
}

.fu-section-tag {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--fu-accent-b);
  margin-bottom: 12px;
}

.fu-section-title {
  font-size: clamp(40px, 5vw, 72px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
  color: var(--fu-ink-0);
}

.fu-section-desc {
  font-size: 16px;
  line-height: 1.7;
  color: var(--fu-ink-2);
  margin: 0;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

/* ============ SOLUTIONS ============ */
.fu-solutions-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.fu-sol-card {
  position: relative;
  padding: 40px 32px;
  border-radius: 24px;
  background: var(--fu-card);
  border: 1px solid var(--fu-card-border);
  backdrop-filter: blur(20px);
  transition: all .4s;
  cursor: pointer;
  overflow: hidden;
}

.fu-sol-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--fu-gradient);
  opacity: 0;
  transition: opacity .4s;
}

.fu-sol-card:hover,
.fu-sol-card.is-active {
  border-color: rgba(59,130,246,.4);
  transform: translateY(-8px);
  box-shadow: 0 28px 70px rgba(59,130,246,.24);
}

.fu-sol-card:hover::before,
.fu-sol-card.is-active::before {
  opacity: 0.08;
}

.fu-sol-glow {
  position: absolute;
  top: -50%;
  right: -30%;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: var(--fu-gradient);
  opacity: 0;
  filter: blur(60px);
  transition: opacity .4s;
}

.fu-sol-card:hover .fu-sol-glow,
.fu-sol-card.is-active .fu-sol-glow {
  opacity: 0.3;
}

.fu-sol-icon {
  font-size: 48px;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}

.fu-sol-num {
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 72px;
  font-weight: 900;
  color: rgba(255,255,255,0.03);
  line-height: 1;
}

.fu-sol-title {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0 0 12px;
  color: var(--fu-ink-0);
  position: relative;
  z-index: 1;
}

.fu-sol-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--fu-ink-2);
  margin: 0 0 20px;
  position: relative;
  z-index: 1;
}

.fu-sol-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

.fu-sol-tag {
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  font-size: 11px;
  font-weight: 600;
  color: var(--fu-ink-1);
}

.fu-sol-arrow {
  position: absolute;
  bottom: 32px;
  right: 32px;
  font-size: 18px;
  color: var(--fu-accent-b);
  opacity: 0;
  transition: opacity .4s;
  z-index: 1;
}

.fu-sol-card:hover .fu-sol-arrow,
.fu-sol-card.is-active .fu-sol-arrow {
  opacity: 1;
}

/* ============ TECHNOLOGY ============ */
.fu-tech-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.fu-tech-stack {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.fu-tech-layer {
  padding: 20px 24px;
  border-radius: 16px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.fu-tech-layer::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  border-radius: 0 2px 2px 0;
}

.fu-tech-layer.layer-app::before { background: linear-gradient(180deg, #0EA5E9, #3B82F6); }
.fu-tech-layer.layer-ai::before { background: linear-gradient(180deg, #3B82F6, #06B6D4); }
.fu-tech-layer.layer-data::before { background: linear-gradient(180deg, #06B6D4, #0EA5E9); }
.fu-tech-layer.layer-net::before { background: linear-gradient(180deg, #60A5FA, #3B82F6); }
.fu-tech-layer.layer-perception::before { background: linear-gradient(180deg, #0EA5E9, #06B6D4); }

.fu-tech-layer span {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--fu-ink-0);
  margin-bottom: 4px;
}

.fu-tech-layer small {
  font-size: 12px;
  color: var(--fu-ink-2);
}

.fu-tech-metrics {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.fu-tech-metric {
  position: relative;
  padding: 20px;
  border-radius: 16px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
}

.fu-tech-metric-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.fu-tech-metric-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--fu-ink-0);
}

.fu-tech-metric-pct {
  font-size: 20px;
  font-weight: 900;
  background: var(--fu-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.fu-tech-bar {
  height: 6px;
  border-radius: 3px;
  background: rgba(255,255,255,0.1);
  overflow: hidden;
}

.fu-tech-bar-fill {
  height: 100%;
  border-radius: 3px;
  background: var(--fu-gradient);
  background-size: 200% 200%;
  animation: fu-flow 5s ease infinite;
  transition: width 1s ease;
}

.fu-tech-metric-desc {
  font-size: 12px;
  color: var(--fu-ink-2);
  margin-top: 8px;
}

.fu-tech-metric-index {
  position: absolute;
  top: 16px;
  right: 16px;
  font-size: 48px;
  font-weight: 900;
  color: rgba(255,255,255,0.02);
}

/* ============ PRODUCTS ============ */
.fu-products-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.fu-product-card {
  position: relative;
  padding: 40px;
  border-radius: 24px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
  backdrop-filter: blur(20px);
  transition: all .4s;
  overflow: hidden;
}

.fu-product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(59,130,246,.2);
  border-color: rgba(59,130,246,.3);
}

.fu-product-grad {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  border-radius: 24px 24px 0 0;
  background: var(--fu-gradient);
  background-size: 200% 200%;
  animation: fu-flow 5s ease infinite;
}

.fu-product-tag {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(192,132,252,.15);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--fu-accent-b);
  margin-bottom: 16px;
}

.fu-product-name {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 12px;
  color: var(--fu-ink-0);
}

.fu-product-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--fu-ink-2);
  margin: 0;
}

.fu-product-link {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 24px;
  font-size: 14px;
  font-weight: 600;
  color: var(--fu-accent-b);
  text-decoration: none;
}

.fu-product-arrow {
  transition: transform .3s;
}

.fu-product-card:hover .fu-product-arrow {
  transform: translateX(6px);
}

/* ============ ABOUT ============ */
.fu-about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.fu-about-title {
  font-size: clamp(36px, 4vw, 56px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 24px;
  color: var(--fu-ink-0);
}

.fu-about-text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--fu-ink-2);
  margin: 0 0 20px;
}

.fu-about-text strong {
  color: var(--fu-ink-0);
}

.fu-about-numbers {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin: 32px 0;
}

.fu-about-numbers > div {
  text-align: center;
  padding: 20px;
  border-radius: 16px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
}

.fu-about-num {
  font-size: 36px;
  font-weight: 900;
  background: var(--fu-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}

.fu-about-label {
  font-size: 12px;
  color: var(--fu-ink-2);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 8px;
}

.fu-about-card {
  position: relative;
  padding: 40px;
  border-radius: 24px;
  background: rgba(59,130,246,.08);
  border: 1px solid rgba(59,130,246,.2);
  backdrop-filter: blur(20px);
  margin-bottom: 32px;
  overflow: hidden;
}

.fu-about-card-glow {
  position: absolute;
  top: -50%;
  right: -30%;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: var(--fu-gradient);
  opacity: 0.18;
  filter: blur(60px);
}

.fu-about-card-kicker {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fu-accent-b);
  margin-bottom: 12px;
}

.fu-about-card-title {
  font-size: 24px;
  font-weight: 800;
  color: var(--fu-ink-0);
  margin: 0 0 16px;
}

.fu-about-card-text {
  font-size: 14px;
  line-height: 1.8;
  color: var(--fu-ink-2);
  margin: 0;
}

.fu-about-timeline {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.fu-timeline-item {
  display: flex;
  align-items: center;
  gap: 20px;
}

.fu-timeline-year {
  font-size: 14px;
  font-weight: 700;
  color: var(--fu-accent-b);
  min-width: 60px;
}

.fu-timeline-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--fu-gradient);
  flex-shrink: 0;
}

.fu-timeline-text {
  font-size: 14px;
  color: var(--fu-ink-2);
}

/* ============ NEWS ============ */
.fu-news-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.fu-news-card {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  background: var(--fu-bg-light);
  border: 1px solid rgba(59,130,246,0.1);
  transition: all .4s;
}

.fu-news-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(59,130,246,.2);
}

.fu-news-cover {
  height: 120px;
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(59,130,246,.15), rgba(6,182,212,.1));
}

.fu-news-cover-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.fu-news-cover-grad {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0) 0%, rgba(15,23,42,0.6) 100%);
}

.fu-news-tag {
  position: relative;
  z-index: 1;
  margin: 16px;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(59,130,246,.9);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: #fff;
}

.fu-news-body {
  padding: 20px;
}

.fu-news-date {
  font-size: 11px;
  color: var(--fu-accent-b);
  margin-bottom: 8px;
}

.fu-news-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--fu-ink-0);
  margin: 0 0 8px;
  line-height: 1.5;
}

.fu-news-desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--fu-ink-2);
  margin: 0 0 12px;
}

.fu-news-more {
  font-size: 13px;
  font-weight: 600;
  color: var(--fu-accent-b);
}

/* ============ MESSAGE BOARD ============ */
.fu-msg-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.fu-msg-card {
  padding: 28px;
  border-radius: 20px;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  transition: all .4s;
}

.fu-msg-card:hover {
  background: rgba(255,255,255,.06);
  border-color: rgba(59,130,246,.25);
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(59,130,246,.12);
}

.fu-msg-card-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.fu-msg-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--fu-gradient);
  background-size: 200% 200%;
  animation: fu-flow 5s ease infinite;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  font-weight: 800;
  color: #fff;
  flex-shrink: 0;
}

.fu-msg-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.fu-msg-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--fu-ink-0);
}

.fu-msg-time {
  font-size: 11px;
  color: var(--fu-ink-3);
}

.fu-msg-text {
  font-size: 14px;
  line-height: 1.8;
  color: var(--fu-ink-2);
  margin: 0;
}

/* ============ CONTACT ============ */
.fu-contact {
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(6,182,212,.15), transparent 60%),
    linear-gradient(180deg, var(--fu-bg-0) 0%, var(--fu-bg-4) 100%);
  padding: 100px 0;
}

.fu-contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.fu-contact-left h2 {
  font-size: clamp(36px, 4vw, 56px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.08;
  margin: 0 0 16px;
}

.fu-contact-left p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--fu-ink-2);
  margin: 0 0 32px;
}

.fu-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.fu-form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.fu-form label {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.fu-form label span {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--fu-ink-1);
}

.fu-form label span em {
  color: var(--fu-accent-a);
  font-style: normal;
}

.fu-form input,
.fu-form textarea {
  padding: 14px 18px;
  border-radius: 12px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.15);
  color: var(--fu-ink-0);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color .2s, box-shadow .2s;
}

.fu-form input::placeholder,
.fu-form textarea::placeholder {
  color: var(--fu-ink-3);
}

.fu-form input:focus,
.fu-form textarea:focus {
  border-color: rgba(192,132,252,.5);
  box-shadow: 0 0 0 4px rgba(192,132,252,.15);
}

.fu-form-full {
  grid-column: span 2;
}

.fu-form textarea {
  min-height: 120px;
  resize: vertical;
}

.fu-form-submit {
  margin-top: 8px;
}

.fu-toast {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  border-radius: 16px;
  background: rgba(74,222,128,.15);
  border: 1px solid rgba(74,222,128,.3);
  margin-top: 20px;
}

.fu-toast-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(74,222,128,.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: #4ADE80;
}

.fu-toast-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--fu-ink-0);
  margin-bottom: 4px;
}

.fu-toast-desc {
  font-size: 13px;
  color: var(--fu-ink-2);
}

/* ============ CONTACT RIGHT ============ */
.fu-contact-card {
  position: relative;
  padding: 40px;
  border-radius: 24px;
  background: rgba(59,130,246,.08);
  border: 1px solid rgba(59,130,246,.2);
  backdrop-filter: blur(20px);
  margin-bottom: 32px;
  overflow: hidden;
}

.fu-contact-card-glow {
  position: absolute;
  top: -50%;
  right: -30%;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: var(--fu-gradient);
  opacity: 0.2;
  filter: blur(60px);
}

.fu-contact-card-kicker {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fu-accent-b);
  margin-bottom: 12px;
}

.fu-contact-card-title {
  font-size: 24px;
  font-weight: 800;
  color: var(--fu-ink-0);
  margin: 0 0 16px;
}

.fu-contact-card-desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--fu-ink-2);
  margin: 0 0 24px;
}

.fu-email-box {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-radius: 12px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 12px;
}

.fu-email-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--fu-ink-2);
  text-transform: uppercase;
}

.fu-email-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--fu-accent-b);
  text-decoration: none;
}

.fu-channels {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.fu-channel {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  border-radius: 12px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
}

.fu-channel-icon {
  width: 28px;
  height: 28px;
  object-fit: contain;
  flex-shrink: 0;
}

.fu-channel-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--fu-ink-2);
  text-transform: uppercase;
  margin-bottom: 2px;
}

.fu-channel-value {
  font-size: 14px;
  font-weight: 600;
  color: var(--fu-ink-0);
}

/* ============ FOOTER ============ */
.fu-footer {
  background: var(--fu-bg-light);
  padding: 80px 0 40px;
  border-top: 1px solid rgba(59,130,246,0.1);
}

.fu-footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.fu-footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--fu-ink-2);
  margin-top: 16px;
  max-width: 340px;
}

.fu-footer-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--fu-ink-0);
  margin: 0 0 16px;
}

.fu-footer-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.fu-footer-col a {
  font-size: 13px;
  color: var(--fu-ink-2);
  text-decoration: none;
  transition: color .2s;
}

.fu-footer-col a:hover {
  color: var(--fu-ink-0);
}

.fu-socials {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}

.fu-social {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(59,130,246,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  color: var(--fu-ink-2);
  cursor: pointer;
  transition: all .2s;
}

.fu-social:hover {
  background: rgba(59,130,246,.2);
  color: var(--fu-accent-b);
}

.fu-footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 32px;
  border-top: 1px solid rgba(59,130,246,0.1);
  font-size: 12px;
  color: var(--fu-ink-3);
}

/* ============ BUSINESS (两大核心业务) ============ */
.fu-business {
  position: relative;
}
.fu-biz-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-top: 56px;
}
.fu-biz-card {
  position: relative;
  overflow: hidden;
  padding: 48px 40px;
  border-radius: 24px;
  background: linear-gradient(160deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02));
  border: 1px solid var(--fu-card-border);
  transition: transform .5s cubic-bezier(.2,.8,.2,1), border-color .5s, box-shadow .5s;
}
.fu-biz-card:hover {
  transform: translateY(-8px);
  border-color: rgba(59,130,246,0.55);
  box-shadow: 0 30px 80px -30px rgba(14,165,233,0.45);
}
.fu-biz-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: radial-gradient(120% 90% at 100% 0%, rgba(14,165,233,0.18), transparent 60%);
  opacity: 0;
  transition: opacity .5s;
}
.fu-biz-card:hover .fu-biz-bg { opacity: 1; }
.fu-biz-camera .fu-biz-bg { background: radial-gradient(120% 90% at 100% 0%, rgba(6,182,212,0.2), transparent 60%); }
.fu-biz-screen .fu-biz-bg { background: radial-gradient(120% 90% at 100% 0%, rgba(59,130,246,0.22), transparent 60%); }
.fu-biz-card > * { position: relative; z-index: 1; }
.fu-biz-head {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 12px;
  margin-bottom: 28px;
}
.fu-biz-icon {
  width: 64px; height: 64px;
  display: grid; place-items: center;
  font-size: 30px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(14,165,233,0.18), rgba(59,130,246,0.12));
  border: 1px solid rgba(59,130,246,0.3);
}
.fu-biz-icon-img {
  width: 40px;
  height: 40px;
  object-fit: contain;
  flex-shrink: 0;
}
.fu-biz-tag {
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--fu-accent-c);
  font-weight: 600;
}
.fu-biz-title {
  margin: 0 0 8px;
  font-size: 28px;
  font-weight: 700;
  color: var(--fu-ink-0);
}
.fu-biz-slogan {
  margin: 0 0 18px;
  font-size: 15px;
  font-weight: 600;
  background: var(--fu-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.fu-biz-desc {
  margin: 0 0 28px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--fu-ink-2);
  min-height: 80px;
}
.fu-biz-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  padding: 22px 0;
  border-top: 1px solid rgba(59,130,246,0.15);
  border-bottom: 1px solid rgba(59,130,246,0.15);
  margin-bottom: 22px;
}
.fu-biz-metric-num {
  font-size: 26px;
  font-weight: 800;
  line-height: 1;
}
.fu-biz-metric-lbl {
  margin-top: 8px;
  font-size: 12px;
  color: var(--fu-ink-3);
}
.fu-biz-features {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}
.fu-biz-feature {
  font-size: 12px;
  padding: 6px 14px;
  border-radius: 999px;
  color: var(--fu-ink-1);
  background: rgba(59,130,246,0.1);
  border: 1px solid rgba(59,130,246,0.22);
}
.fu-biz-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--fu-accent-a);
  cursor: pointer;
  transition: gap .3s;
}
.fu-biz-cta:hover { gap: 14px; }
.fu-biz-index {
  position: absolute;
  right: 28px; bottom: 16px;
  font-size: 72px;
  font-weight: 800;
  line-height: 1;
  color: rgba(255,255,255,0.04);
  z-index: 0 !important;
}

/* ============ ADVANTAGE (东方日升式标注) ============ */
.fu-advantage { overflow: hidden; }
.fu-adv-stage {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  margin-top: 64px;
  min-height: 480px;
}
.fu-adv-device {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 200px;
  height: 360px;
  display: grid;
  place-items: center;
  z-index: 3;
  pointer-events: none;
}
.fu-adv-device-glow {
  position: absolute;
  inset: -40px;
  background: radial-gradient(circle, rgba(14,165,233,0.35), transparent 65%);
  filter: blur(20px);
  animation: fu-pulse 4s ease-in-out infinite;
}
@keyframes fu-pulse {
  0%,100% { opacity: .6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.06); }
}
.fu-adv-device-frame {
  position: relative;
  z-index: 2;
  width: 150px;
  height: 340px;
  border-radius: 20px;
  background: linear-gradient(160deg, #1b2740, #0b1220);
  border: 1px solid rgba(96,165,250,0.4);
  box-shadow: 0 20px 60px -20px rgba(0,0,0,0.8), inset 0 0 30px rgba(59,130,246,0.15);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 26px;
}
.fu-adv-device-lens {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #7dd3fc, #0369a1 60%, #0b1220);
  box-shadow: 0 0 18px rgba(125,211,252,0.7), inset 0 0 6px rgba(255,255,255,0.5);
  margin-bottom: 22px;
  position: relative;
}
.fu-adv-device-lens::after {
  content: '';
  position: absolute;
  inset: 12px;
  border-radius: 50%;
  background: radial-gradient(circle, #0b1220, #000);
}
.fu-adv-device-screen {
  position: relative;
  width: 108px; height: 190px;
  border-radius: 10px;
  overflow: hidden;
  background: linear-gradient(160deg, #0ea5e9 0%, #1e3a8a 55%, #0b1220 100%);
  border: 1px solid rgba(125,211,252,0.4);
}
.fu-adv-scan {
  position: absolute;
  left: 0; right: 0;
  height: 40%;
  background: linear-gradient(180deg, rgba(255,255,255,0.25), transparent);
  animation: fu-scan 3s linear infinite;
}
@keyframes fu-scan {
  0% { top: -40%; }
  100% { top: 100%; }
}
.fu-adv-screen-ui {
  position: absolute;
  left: 12px; right: 12px; bottom: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.fu-adv-ui-dot {
  width: 16px; height: 16px; border-radius: 50%;
  background: rgba(255,255,255,0.85);
}
.fu-adv-ui-line {
  height: 6px; border-radius: 3px;
  background: rgba(255,255,255,0.4);
}
.fu-adv-ui-line.short { width: 60%; }
.fu-adv-device-base {
  position: absolute;
  bottom: 14px;
  width: 60px; height: 8px;
  border-radius: 4px;
  background: rgba(96,165,250,0.35);
}
.fu-adv-orbit {
  position: absolute;
  width: 320px; height: 320px;
  border: 1px dashed rgba(59,130,246,0.35);
  border-radius: 50%;
  animation: fu-spin 18s linear infinite;
}
.fu-adv-orbit::before {
  content: '';
  position: absolute;
  top: -4px; left: 50%;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--fu-accent-a);
  box-shadow: 0 0 12px var(--fu-accent-a);
}
.fu-adv-orbit.reverse {
  width: 400px; height: 400px;
  border-color: rgba(6,182,212,0.25);
  animation-duration: 26s;
  animation-direction: reverse;
}
@keyframes fu-spin { to { transform: rotate(360deg); } }
.fu-adv-col {
  display: flex;
  flex-direction: column;
  gap: 56px;
  width: 100%;
}
.fu-adv-left { align-items: flex-end; padding-right: 118px; }
.fu-adv-right { align-items: flex-start; padding-left: 118px; }
.fu-adv-item {
  display: flex;
  align-items: center;
  gap: 16px;
  max-width: 300px;
}
.fu-adv-item.align-right { justify-content: flex-end; text-align: right; }
.fu-adv-item.align-left { justify-content: flex-start; text-align: left; }
.fu-adv-item-icon {
  flex: none;
  width: 48px; height: 48px;
  object-fit: contain;
}
.fu-adv-item-body { min-width: 0; }
.fu-adv-item-title {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 700;
  color: var(--fu-ink-0);
}
.fu-adv-item-desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--fu-ink-2);
}
.fu-adv-item.align-right .fu-adv-item-desc { margin-left: auto; }
.fu-adv-line {
  flex: none;
  width: 56px;
  height: 1px;
  background: linear-gradient(90deg, rgba(59,130,246,0.6), rgba(59,130,246,0.1));
  position: relative;
}
.fu-adv-line i {
  position: absolute;
  top: 50%;
  width: 8px; height: 8px;
  margin-top: -4px;
  border-radius: 50%;
  background: var(--fu-accent-a);
  box-shadow: 0 0 10px var(--fu-accent-a);
}
.fu-adv-line.left { transform: scaleX(-1); }
.fu-adv-line.left i { right: 0; }
.fu-adv-line.right i { left: 0; }

/* ============ MULTI-PAGE ROUTE ============ */
.fu-page {
  animation: fu-page-in 0.4s ease both;
}

@keyframes fu-page-in {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.fu-nav-item.is-current > a {
  background: var(--fu-gradient);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  animation: fu-flow 5s ease infinite;
  font-weight: 700;
}

.fu-nav-item.is-current::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: -8px;
  width: 20px;
  height: 2px;
  transform: translateX(-50%);
  border-radius: 2px;
  background: var(--fu-gradient);
}

/* ============ PAGE BANNER ============ */
.fu-banner {
  position: relative;
  min-height: 320px;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 140px 0 64px;
  background:
    radial-gradient(ellipse 80% 90% at 20% 20%, rgba(59,130,246,.35), transparent 60%),
    radial-gradient(ellipse 60% 80% at 80% 80%, rgba(6,182,212,.3), transparent 60%),
    linear-gradient(180deg, #1E293B 0%, #1E3A5F 100%);
  border-bottom: 1px solid rgba(59,130,246,0.18);
}

.fu-banner-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(59, 130, 246, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 130, 246, 0.1) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: radial-gradient(ellipse 90% 90% at 50% 40%, #000 20%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 90% 90% at 50% 40%, #000 20%, transparent 80%);
  pointer-events: none;
}

.fu-banner-glow {
  position: absolute;
  width: 320px;
  height: 320px;
  right: 8%;
  top: 30%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.3), transparent 70%);
  filter: blur(40px);
  animation: fu-mega-pulse 4s ease-in-out infinite;
  pointer-events: none;
}

.fu-banner-inner { text-align: left; }

.fu-breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--fu-ink-2);
  margin-bottom: 24px;
}

.fu-breadcrumb a {
  color: var(--fu-ink-2);
  cursor: pointer;
  text-decoration: none;
  transition: color .2s;
}

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

.fu-breadcrumb-sep { color: var(--fu-ink-3); }

.fu-banner-tag {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--fu-accent-c);
  margin-bottom: 14px;
}

.fu-banner-title {
  font-size: clamp(40px, 5vw, 68px);
  font-weight: 900;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
  line-height: 1.1;
}

.fu-banner-desc {
  font-size: 16px;
  line-height: 1.8;
  color: var(--fu-ink-2);
  max-width: 680px;
  margin: 0;
}

/* 带实景背景图 + 右侧插画的 banner（联系我们） */
.fu-banner--img {
  background:
    linear-gradient(90deg, rgba(30,41,59,.92) 0%, rgba(30,41,59,.6) 45%, rgba(30,41,59,.15) 100%),
    url('../img/img-contact-bg.png') center / cover no-repeat,
    linear-gradient(180deg, #1E293B 0%, #1E3A5F 100%);
}
.fu-banner--img .fu-banner-grid { opacity: .5; }
.fu-banner-port {
  position: absolute;
  right: 4%;
  top: 60%;
  transform: translateY(-50%);
  width: clamp(240px, 26vw, 360px);
  height: auto;
  object-fit: contain;
  filter: drop-shadow(0 20px 40px rgba(0, 0, 0, .35));
  pointer-events: none;
}

/* ============ SECTION TWEAKS ============ */
.fu-section-tight { padding: 64px 0; }

.fu-section-title-sm { font-size: clamp(28px, 3.4vw, 44px); }

.fu-view-all {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 22px;
  font-size: 14px;
  font-weight: 600;
  color: var(--fu-accent-a);
  cursor: pointer;
  transition: gap .3s;
}

.fu-view-all:hover { gap: 14px; }

/* ============ DETAIL ROW（交替左右深度区块） ============ */
.fu-detail-row {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
  align-items: start;
  padding: 64px 0;
  border-bottom: 1px solid rgba(59,130,246,0.1);
}

.fu-detail-row:first-child { padding-top: 8px; }
.fu-detail-row:last-of-type { border-bottom: none; }
.fu-detail-row.reverse { grid-template-columns: 1.1fr 0.9fr; }
.fu-detail-row.reverse .fu-detail-visual { order: 2; }
.fu-detail-row.reverse .fu-detail-body { order: 1; }

.fu-detail-visual {
  position: relative;
  border-radius: 24px;
  overflow: hidden;
  min-height: 420px;
  padding: 36px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
  background:
    radial-gradient(ellipse 70% 60% at 30% 25%, rgba(14, 165, 233, 0.3), transparent 65%),
    radial-gradient(ellipse 60% 50% at 75% 80%, rgba(6, 182, 212, 0.25), transparent 60%),
    linear-gradient(160deg, #1E3A5F 0%, #0F172A 100%);
  border: 1px solid rgba(59, 130, 246, 0.28);
  box-shadow: 0 30px 80px -40px rgba(14,165,233,0.5);
}

.fu-detail-visual-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(59, 130, 246, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 130, 246, 0.12) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, #000 30%, transparent 75%);
}

.fu-detail-visual-icon {
  position: relative;
  z-index: 1;
  font-size: 88px;
  filter: drop-shadow(0 0 28px rgba(14, 165, 233, 0.65));
}

img.fu-detail-icon-img { width: 88px; height: 88px; object-fit: contain; filter: none; }
img.fu-detail-icon-lg { width: 120px; height: 120px; object-fit: contain; filter: none; }

.fu-detail-visual-tag {
  position: relative;
  z-index: 1;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.25em;
  color: var(--fu-accent-c);
}

.fu-detail-visual-metrics {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  width: 100%;
  padding-top: 24px;
  border-top: 1px solid rgba(59,130,246,0.25);
}

.fu-detail-metric { text-align: center; }

.fu-detail-metric-num { font-size: 22px; font-weight: 800; line-height: 1.2; }

.fu-detail-metric-lbl { margin-top: 6px; font-size: 11px; color: var(--fu-ink-2); }

.fu-detail-visual-chips {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.fu-detail-body { min-width: 0; }

.fu-detail-title {
  font-size: clamp(26px, 2.6vw, 36px);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
  color: var(--fu-ink-0);
}

.fu-detail-slogan {
  margin: 0 0 16px;
  font-size: 16px;
  font-weight: 700;
  background: var(--fu-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.fu-detail-desc {
  font-size: 15px;
  line-height: 1.9;
  color: var(--fu-ink-2);
  margin: 0 0 24px;
}

.fu-detail-list {
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.fu-detail-list li { display: flex; gap: 12px; align-items: flex-start; }

.fu-detail-check {
  flex: none;
  width: 22px; height: 22px;
  margin-top: 2px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 12px;
  font-weight: 800;
  color: #fff;
  background: var(--fu-gradient);
  box-shadow: 0 0 14px rgba(14,165,233,0.5);
}

.fu-detail-item-body strong {
  display: block;
  font-size: 15px;
  color: var(--fu-ink-0);
  margin-bottom: 2px;
}

.fu-detail-item-body p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--fu-ink-2);
}

.fu-detail-subtitle {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fu-accent-b);
  margin: 26px 0 12px;
}

.fu-detail-chips { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 8px; }

/* ============ SPEC TABLE ============ */
.fu-spec-table {
  width: 100%;
  border-collapse: collapse;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid rgba(59,130,246,0.2);
}

.fu-spec-table td {
  padding: 11px 16px;
  font-size: 13px;
  border-bottom: 1px solid rgba(59,130,246,0.12);
}

.fu-spec-table tr:last-child td { border-bottom: none; }

.fu-spec-table tr:nth-child(odd) td { background: rgba(255,255,255,0.03); }
.fu-spec-table tr:nth-child(even) td { background: rgba(59,130,246,0.05); }

.fu-spec-k {
  width: 38%;
  color: var(--fu-ink-2);
  font-weight: 600;
}

.fu-spec-v { color: var(--fu-ink-0); }

/* ============ META ROWS（方案元信息） ============ */
.fu-meta-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 8px;
}

.fu-meta-row {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 16px;
  padding: 12px 16px;
  border-radius: 12px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
}

.fu-meta-k {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--fu-accent-c);
  padding-top: 1px;
}

.fu-meta-v { font-size: 13px; line-height: 1.7; color: var(--fu-ink-1); }

/* ============ DUAL MODEL ============ */
.fu-model { margin-top: 72px; }

.fu-model-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 36px;
}

.fu-model-card {
  padding: 32px 28px;
  border-radius: 20px;
  background: var(--fu-card);
  border: 1px solid var(--fu-card-border);
  backdrop-filter: blur(20px);
  transition: all .4s;
}

.fu-model-card:hover {
  transform: translateY(-4px);
  border-color: rgba(59,130,246,.45);
  box-shadow: 0 20px 60px -20px rgba(14,165,233,0.4);
}

.fu-model-icon {
  width: 56px; height: 56px;
  display: grid; place-items: center;
  font-size: 26px;
  border-radius: 16px;
  margin-bottom: 18px;
  background: linear-gradient(135deg, rgba(14,165,233,0.18), rgba(59,130,246,0.12));
  border: 1px solid rgba(59,130,246,0.3);
}
.fu-model-icon:has(img) { background: none; border: none; border-radius: 0; }
img.fu-model-icon-img { width: 56px; height: 56px; object-fit: contain; display: block; }

.fu-model-title { font-size: 17px; font-weight: 800; color: var(--fu-ink-0); margin-bottom: 10px; }

.fu-model-desc { font-size: 13px; line-height: 1.8; color: var(--fu-ink-2); margin: 0; }

.fu-model-chain {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  padding: 28px;
  border-radius: 20px;
  background: rgba(59,130,246,0.06);
  border: 1px dashed rgba(59,130,246,0.3);
}

.fu-chain-step {
  padding: 12px 26px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  color: var(--fu-ink-0);
  background: var(--fu-gradient);
  background-size: 200% 200%;
  animation: fu-flow 5s ease infinite;
  box-shadow: 0 8px 24px -8px rgba(14,165,233,0.6);
}

.fu-chain-arrow { font-size: 18px; color: var(--fu-accent-c); }

/* ============ ADVANTAGE CARDS / CAP GRID ============ */
.fu-adv-grid, .fu-cap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.fu-adv-card, .fu-cap-card {
  position: relative;
  padding: 34px 28px;
  border-radius: 20px;
  background: var(--fu-card);
  border: 1px solid var(--fu-card-border);
  backdrop-filter: blur(20px);
  overflow: hidden;
  transition: all .4s;
}

.fu-adv-card::before, .fu-cap-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--fu-gradient);
  background-size: 200% 200%;
  animation: fu-flow 5s ease infinite;
  opacity: 0;
  transition: opacity .4s;
}

.fu-adv-card:hover, .fu-cap-card:hover {
  transform: translateY(-4px);
  border-color: rgba(59,130,246,.45);
  box-shadow: 0 20px 60px -20px rgba(14,165,233,0.4);
}

.fu-adv-card:hover::before, .fu-cap-card:hover::before { opacity: 1; }

.fu-adv-card-icon, .fu-cap-icon {
  width: 54px; height: 54px;
  display: grid; place-items: center;
  font-size: 25px;
  border-radius: 15px;
  margin-bottom: 18px;
  background: linear-gradient(135deg, rgba(14,165,233,0.18), rgba(59,130,246,0.12));
  border: 1px solid rgba(59,130,246,0.3);
}

img.fu-adv-card-icon {
  width: 48px;
  height: 48px;
  display: block;
  object-fit: contain;
  border-radius: 0;
  border: none;
  background: none;
  font-size: 0;
}

img.fu-cap-icon {
  width: 48px;
  height: 48px;
  display: block;
  object-fit: contain;
  border-radius: 0;
  border: none;
  background: none;
  font-size: 0;
}

.fu-adv-card-title, .fu-cap-title {
  font-size: 18px;
  font-weight: 800;
  color: var(--fu-ink-0);
  margin: 0 0 10px;
}

.fu-adv-card-desc, .fu-cap-desc {
  font-size: 13px;
  line-height: 1.8;
  color: var(--fu-ink-2);
  margin: 0;
}

/* ============ SERVICE PROCESS ============ */
.fu-process {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
}

.fu-process-step {
  position: relative;
  padding: 30px 20px;
  border-radius: 18px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(59,130,246,0.18);
  text-align: center;
  transition: all .4s;
}

.fu-process-step:hover {
  transform: translateY(-4px);
  border-color: rgba(59,130,246,.45);
  box-shadow: 0 16px 40px -16px rgba(14,165,233,0.45);
}

.fu-process-num {
  position: absolute;
  top: 12px; right: 14px;
  font-size: 12px;
  font-weight: 800;
  color: var(--fu-accent-b);
  font-family: ui-monospace, monospace;
  opacity: 0.8;
}

.fu-process-icon { font-size: 30px; margin-bottom: 14px; }

img.fu-process-icon-img { width: 50px; height: 50px; object-fit: contain; display: inline-block; }

.fu-process-title { font-size: 16px; font-weight: 800; color: var(--fu-ink-0); margin-bottom: 8px; }

.fu-process-desc { font-size: 12px; line-height: 1.7; color: var(--fu-ink-2); margin: 0; }

.fu-process-arrow {
  position: absolute;
  right: -15px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 16px;
  color: var(--fu-accent-c);
  z-index: 2;
}

/* ============ HONORS BAR ============ */
.fu-honors {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 40px 36px;
  border-radius: 24px;
  background:
    radial-gradient(ellipse 60% 100% at 50% 0%, rgba(59,130,246,0.12), transparent 70%),
    rgba(255,255,255,0.03);
  border: 1px solid rgba(59,130,246,0.22);
  backdrop-filter: blur(20px);
}

.fu-honor { text-align: center; }

.fu-honor-num { font-size: 38px; font-weight: 900; line-height: 1.1; }

.fu-honor-label {
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--fu-ink-2);
  text-transform: uppercase;
}

/* ============ PAGE CTA ============ */
.fu-page-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  padding: 48px 52px;
  border-radius: 28px;
  background:
    radial-gradient(ellipse 60% 120% at 15% 0%, rgba(14,165,233,0.25), transparent 60%),
    radial-gradient(ellipse 50% 120% at 90% 100%, rgba(6,182,212,0.2), transparent 60%),
    linear-gradient(160deg, rgba(255,255,255,0.07), rgba(255,255,255,0.02));
  border: 1px solid rgba(59,130,246,0.3);
  box-shadow: 0 30px 80px -40px rgba(14,165,233,0.5);
}

.fu-page-cta-text { min-width: 0; }

.fu-page-cta-title {
  font-size: clamp(22px, 2.4vw, 30px);
  font-weight: 800;
  color: var(--fu-ink-0);
  margin: 0 0 10px;
}

.fu-page-cta-desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--fu-ink-2);
  margin: 0;
  max-width: 560px;
}

/* ============ RELATED ============ */
.fu-related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.fu-related-card {
  position: relative;
  padding: 30px 28px;
  border-radius: 20px;
  background: var(--fu-card);
  border: 1px solid var(--fu-card-border);
  cursor: pointer;
  transition: all .4s;
  overflow: hidden;
}

.fu-related-card:hover {
  transform: translateY(-4px);
  border-color: rgba(59,130,246,.5);
  box-shadow: 0 20px 50px -20px rgba(14,165,233,0.45);
}

.fu-related-icon { font-size: 30px; margin-bottom: 14px; }
img.fu-related-icon {
  width: 40px;
  height: 40px;
  display: block;
  object-fit: contain;
  font-size: 0;
}

.fu-related-title { font-size: 17px; font-weight: 800; color: var(--fu-ink-0); margin-bottom: 8px; }

.fu-related-desc { font-size: 13px; line-height: 1.7; color: var(--fu-ink-2); }

.fu-related-arrow {
  position: absolute;
  right: 24px; bottom: 22px;
  font-size: 18px;
  color: var(--fu-accent-b);
  opacity: 0;
  transform: translateX(-6px);
  transition: all .3s;
}

.fu-related-card:hover .fu-related-arrow { opacity: 1; transform: translateX(0); }

/* ============ NEWS LIST（子页面大图列表） ============ */
.fu-news-list { display: flex; flex-direction: column; gap: 24px; }

.fu-news-row {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 32px;
  padding: 20px;
  border-radius: 20px;
  background: var(--fu-bg-light);
  border: 1px solid rgba(59,130,246,0.12);
  cursor: default;
  transition: all .4s;
}

.fu-news-row:hover {
  transform: translateY(-3px);
  border-color: rgba(59,130,246,.35);
  box-shadow: 0 16px 48px rgba(59,130,246,.15);
}

.fu-news-row-cover {
  position: relative;
  min-height: 180px;
  border-radius: 14px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(59,130,246,.22), rgba(6,182,212,.14));
}

.fu-news-row-grad {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 70% at 30% 30%, rgba(14,165,233,0.28), transparent 65%),
    linear-gradient(180deg, rgba(0,0,0,0) 0%, rgba(15,23,42,0.55) 100%);
}

.fu-news-row-icon { font-size: 54px; opacity: 0.85; filter: drop-shadow(0 0 18px rgba(14,165,233,0.5)); }

.fu-news-row .fu-news-tag { position: absolute; top: 0; left: 0; margin: 14px; }

.fu-news-row-body { padding: 14px 18px 14px 0; display: flex; flex-direction: column; justify-content: center; }

.fu-news-row-title {
  font-size: 19px;
  font-weight: 800;
  color: var(--fu-ink-0);
  margin: 6px 0 10px;
  line-height: 1.5;
}

/* ============ MESSAGE HINT ============ */
.fu-msg-hint {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 40px;
  padding: 28px 32px;
  border-radius: 20px;
  background: rgba(59,130,246,0.07);
  border: 1px dashed rgba(59,130,246,0.35);
}

img.fu-msg-hint-icon-img { width: 52px; height: 52px; object-fit: contain; flex: none; }

.fu-msg-hint-text { flex: 1; min-width: 240px; font-size: 14px; line-height: 1.8; color: var(--fu-ink-2); }
.fu-msg-hint-text strong { color: var(--fu-ink-0); }
.fu-msg-hint-btn { padding: 12px 26px; font-size: 14px; }

/* ============ OFFICE GRID ============ */
.fu-office-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.fu-office-card {
  padding: 32px 28px;
  border-radius: 20px;
  background: var(--fu-card);
  border: 1px solid var(--fu-card-border);
  backdrop-filter: blur(20px);
  transition: all .4s;
}

.fu-office-card:hover {
  transform: translateY(-4px);
  border-color: rgba(59,130,246,.45);
  box-shadow: 0 20px 50px -20px rgba(14,165,233,0.4);
}

.fu-office-icon { font-size: 30px; margin-bottom: 14px; }

.fu-office-name { font-size: 18px; font-weight: 800; color: var(--fu-ink-0); margin: 0 0 10px; }

.fu-office-addr { font-size: 13px; line-height: 1.8; color: var(--fu-ink-2); margin: 0 0 14px; }

.fu-office-role {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--fu-accent-c);
  background: rgba(6,182,212,0.1);
  border: 1px solid rgba(6,182,212,0.3);
  margin-bottom: 12px;
}

.fu-office-tel { font-size: 13px; font-weight: 600; color: var(--fu-ink-1); white-space: nowrap; }

.fu-office-tel-icon { width: 14px; height: 14px; vertical-align: -2px; display: inline-block; }

.fu-contact-page { padding-top: 80px; }

/* ============ 首页高级感升级 ============ */

/* ---- 通用跑马灯 ---- */
.fu-marquee { overflow: hidden; width: 100%; }

.fu-marquee-track {
  display: flex;
  width: max-content;
  animation: fu-marquee linear infinite;
}

.fu-marquee-group { display: flex; align-items: center; flex-shrink: 0; }

@keyframes fu-marquee { to { transform: translateX(-50%); } }

.fu-marquee:hover .fu-marquee-track { animation-play-state: paused; }

/* ---- TRUSTED BY 跑马灯 ---- */
.fu-trusted { padding: 60px 0; }

.fu-trusted-label { margin-bottom: 28px; }

.fu-trusted-marquee {
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}

.fu-trusted-marquee .fu-partner-logo {
  margin-right: 24px;
  white-space: nowrap;
  opacity: 0.55;
  transition: opacity .3s, border-color .3s;
}

.fu-trusted-marquee .fu-partner-logo:hover {
  opacity: 1;
  border-color: rgba(59,130,246,0.45);
}

/* ---- SectionHead 幽灵数字 + 渐变短线 ---- */
.fu-section-head { position: relative; }

.fu-section-head > *:not(.fu-section-ghost) { position: relative; z-index: 1; }

.fu-section-ghost {
  position: absolute;
  left: 50%;
  top: -46px;
  transform: translateX(-50%);
  font-size: 180px;
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0.02em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(59,130,246,0.15);
  pointer-events: none;
  user-select: none;
  z-index: 0;
}

.fu-section-rule {
  display: block;
  width: 64px;
  height: 3px;
  margin: 0 auto 18px;
  border-radius: 2px;
  background: var(--fu-gradient);
  background-size: 200% 200%;
  animation: fu-flow 5s ease infinite;
  box-shadow: 0 0 14px rgba(14,165,233,0.65);
}

/* ---- 实时运营舱 ---- */
.fu-ops-screen {
  position: relative;
  padding: 28px;
  border-radius: 24px;
  background: linear-gradient(160deg, rgba(15,23,42,0.92), rgba(30,41,59,0.78));
  border: 1px solid rgba(59,130,246,0.28);
  backdrop-filter: blur(20px);
  box-shadow: 0 40px 100px -40px rgba(2,6,23,0.9), inset 0 0 60px rgba(59,130,246,0.06);
  overflow: hidden;
}

.fu-ops-screen-glow {
  position: absolute;
  top: -60%;
  left: 50%;
  width: 120%;
  height: 120%;
  transform: translateX(-50%);
  background: radial-gradient(ellipse 60% 50% at 50% 0%, rgba(14,165,233,0.16), transparent 65%);
  pointer-events: none;
}

.fu-ops-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.05fr 1.25fr 1.1fr;
  gap: 20px;
}

.fu-ops-metrics { display: flex; flex-direction: column; gap: 14px; }

.fu-ops-metric {
  flex: 1;
  padding: 14px 16px;
  border-radius: 14px;
  background: rgba(59,130,246,0.06);
  border: 1px solid rgba(59,130,246,0.16);
}

.fu-ops-metric-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--fu-ink-2);
}

.fu-ops-metric-live {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: #22c55e;
}

.fu-ops-metric-live i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 8px #22c55e;
  animation: fu-pulse 1.6s ease-in-out infinite;
}

.fu-ops-metric-num {
  font-size: 30px;
  font-weight: 900;
  line-height: 1.2;
  margin: 6px 0 10px;
  font-variant-numeric: tabular-nums;
}

.fu-ops-metric-bar { height: 3px; border-radius: 2px; background: rgba(255,255,255,0.07); overflow: hidden; }
.fu-ops-metric-bar span { display: block; height: 100%; border-radius: 2px; background: var(--fu-gradient); }

/* 监控画面 */
.fu-ops-monitor {
  display: flex;
  flex-direction: column;
  border-radius: 14px;
  overflow: hidden;
  background: #0b1220;
  border: 1px solid rgba(59,130,246,0.25);
}

.fu-ops-monitor-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--fu-ink-2);
  background: rgba(255,255,255,0.03);
  border-bottom: 1px solid rgba(59,130,246,0.15);
}

.fu-ops-rec {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  color: #ef4444;
}

.fu-ops-rec i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #ef4444;
  box-shadow: 0 0 8px #ef4444;
  animation: fu-blink 1.2s steps(2, start) infinite;
}

@keyframes fu-blink { 50% { opacity: 0.15; } }

.fu-ops-monitor-body {
  position: relative;
  flex: 1;
  min-height: 250px;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 50% 110%, rgba(30,58,95,0.55), transparent 60%),
    linear-gradient(180deg, #0b1220, #101a2e);
}

.fu-ops-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.fu-ops-monitor-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(59,130,246,0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59,130,246,0.08) 1px, transparent 1px);
  background-size: 28px 28px;
  opacity: 0.6;
}

.fu-ops-scanline {
  position: absolute;
  left: 0;
  right: 0;
  height: 32%;
  background: linear-gradient(180deg, rgba(6,182,212,0.16), transparent);
  animation: fu-scan 3.4s linear infinite;
}

.fu-ops-box {
  position: absolute;
  left: 30%;
  top: 30%;
  width: 36%;
  height: 38%;
  border: 2px solid #ef4444;
  border-radius: 4px;
  box-shadow: 0 0 18px rgba(239,68,68,0.45), inset 0 0 18px rgba(239,68,68,0.12);
  animation: fu-box-pulse 2s ease-in-out infinite;
}

@keyframes fu-box-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.55; }
}

.fu-ops-box-label {
  position: absolute;
  top: -24px;
  left: -2px;
  background: #ef4444;
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  white-space: nowrap;
}

.fu-ops-hud-corner {
  position: absolute;
  width: 16px;
  height: 16px;
  border-color: rgba(6,182,212,0.7);
  border-style: solid;
  border-width: 0;
}
.fu-ops-hud-corner.tl { top: 10px; left: 10px; border-top-width: 2px; border-left-width: 2px; }
.fu-ops-hud-corner.tr { top: 10px; right: 10px; border-top-width: 2px; border-right-width: 2px; }
.fu-ops-hud-corner.bl { bottom: 10px; left: 10px; border-bottom-width: 2px; border-left-width: 2px; }
.fu-ops-hud-corner.br { bottom: 10px; right: 10px; border-bottom-width: 2px; border-right-width: 2px; }

.fu-ops-monitor-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  font-size: 10px;
  letter-spacing: 0.04em;
  color: var(--fu-ink-3);
  font-family: ui-monospace, 'SF Mono', Consolas, monospace;
  background: rgba(255,255,255,0.03);
  border-top: 1px solid rgba(59,130,246,0.15);
}

/* 事件流 */
.fu-ops-feed {
  display: flex;
  flex-direction: column;
  border-radius: 14px;
  background: rgba(59,130,246,0.05);
  border: 1px solid rgba(59,130,246,0.16);
  padding: 14px;
}

.fu-ops-feed-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  font-size: 12px;
  font-weight: 700;
  color: var(--fu-ink-1);
  margin-bottom: 12px;
}

.fu-ops-feed-head span { font-size: 10px; font-weight: 600; letter-spacing: 0.14em; color: var(--fu-ink-3); }

.fu-ops-feed-list { display: flex; flex-direction: column; gap: 8px; overflow: hidden; }

.fu-ops-event {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 10px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.05);
  border-left: 2px solid transparent;
  font-size: 11px;
  color: var(--fu-ink-2);
  transition: background .5s, border-color .5s, color .5s;
}

.fu-ops-event.kind-alert { border-left-color: #ef4444; }
.fu-ops-event.kind-ok    { border-left-color: #22c55e; }
.fu-ops-event.kind-info  { border-left-color: var(--fu-accent-c); }

.fu-ops-event-icon { flex-shrink: 0; }
.fu-ops-event-text { flex: 1; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.fu-ops-event-time { flex-shrink: 0; font-size: 10px; color: var(--fu-ink-3); font-family: ui-monospace, 'SF Mono', Consolas, monospace; }

.fu-ops-event.is-new {
  animation: fu-event-in .5s ease;
  background: rgba(59,130,246,0.12);
  border-top-color: rgba(59,130,246,0.3);
  border-right-color: rgba(59,130,246,0.3);
  border-bottom-color: rgba(59,130,246,0.3);
  color: var(--fu-ink-1);
}

@keyframes fu-event-in {
  from { opacity: 0; transform: translateY(-12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* 底部状态栏 */
.fu-ops-status {
  position: relative;
  z-index: 1;
  margin-top: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding-top: 18px;
  border-top: 1px solid rgba(59,130,246,0.15);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--fu-ink-2);
}

.fu-ops-status em { font-style: normal; color: var(--fu-ink-3); }

.fu-ops-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 10px #22c55e;
  animation: fu-pulse 2s ease-in-out infinite;
}

/* ---- 全站大字幕跑马灯 ---- */
.fu-bigmarquee {
  padding: 44px 0;
  transform: rotate(-2deg);
  overflow: hidden;
  opacity: 0.5;
  pointer-events: none;
}

.fu-bigmarquee-text {
  font-size: 72px;
  font-weight: 900;
  letter-spacing: 0.02em;
  line-height: 1;
  white-space: nowrap;
  color: transparent;
  -webkit-text-stroke: 1px rgba(59,130,246,0.32);
  padding-right: 40px;
}

/* ---- 卡片光泽扫过 ---- */
.fu-biz-card::after,
.fu-sol-card::after,
.fu-product-card::after {
  content: '';
  position: absolute;
  top: -20%;
  left: 0;
  width: 55%;
  height: 140%;
  background: linear-gradient(105deg, transparent, rgba(255,255,255,0.14), transparent);
  transform: translateX(-130%) skewX(-14deg);
  transition: transform .8s ease;
  pointer-events: none;
  z-index: 3;
}

.fu-biz-card:hover::after,
.fu-sol-card:hover::after,
.fu-product-card:hover::after {
  transform: translateX(260%) skewX(-14deg);
}

/* ---- 响应式与动效降级 ---- */
@media (max-width: 900px) {
  .fu-ops-grid { grid-template-columns: 1fr; }
  .fu-section-ghost { font-size: 110px; top: -20px; }
}

@media (max-width: 768px) {
  .fu-bigmarquee-text { font-size: 36px; }
}

@media (prefers-reduced-motion: reduce) {
  .fu-marquee-track,
  .fu-ops-scanline,
  .fu-ops-box,
  .fu-ops-event.is-new,
  .fu-ops-rec i,
  .fu-ops-metric-live i,
  .fu-ops-status-dot {
    animation: none !important;
  }
  .fu-marquee-track { transform: none !important; }
}

/* ============ RESPONSIVE ============ */
@media (max-width: 1024px) {
  .fu-nav-menu { display: none; }
  .fu-trusted-logos { grid-template-columns: repeat(3, 1fr); }
  .fu-solutions-grid { grid-template-columns: repeat(2, 1fr); }
  .fu-tech-grid { grid-template-columns: 1fr; }
  .fu-products-grid { grid-template-columns: 1fr; }
  .fu-about-grid { grid-template-columns: 1fr; }
  .fu-about-numbers { grid-template-columns: repeat(2, 1fr); }
  .fu-news-grid { grid-template-columns: repeat(2, 1fr); }
  .fu-msg-list { grid-template-columns: repeat(2, 1fr); }
  .fu-contact-grid { grid-template-columns: 1fr; }
  .fu-footer-grid { grid-template-columns: 1fr 1fr; }
  .fu-form-row { grid-template-columns: 1fr; }
  .fu-biz-grid { grid-template-columns: 1fr; }
  .fu-adv-stage { grid-template-columns: 1fr; gap: 40px; }
  .fu-adv-line { display: none; }
  .fu-adv-item.align-right { justify-content: flex-start; text-align: left; }
  .fu-adv-item.align-right .fu-adv-item-desc { margin-left: 0; }
  .fu-adv-item.align-right .fu-adv-item-icon { order: -1; }
  .fu-detail-row, .fu-detail-row.reverse { grid-template-columns: 1fr; gap: 36px; padding: 48px 0; }
  .fu-detail-row.reverse .fu-detail-visual { order: 0; }
  .fu-detail-row.reverse .fu-detail-body { order: 1; }
  .fu-detail-visual { min-height: 320px; }
  .fu-model-grid { grid-template-columns: 1fr; }
  .fu-adv-grid, .fu-cap-grid { grid-template-columns: repeat(2, 1fr); }
  .fu-process { grid-template-columns: repeat(2, 1fr); }
  .fu-process-arrow { display: none; }
  .fu-honors { grid-template-columns: repeat(2, 1fr); }
  .fu-related-grid { grid-template-columns: 1fr; }
  .fu-office-grid { grid-template-columns: 1fr; }
  .fu-news-row { grid-template-columns: 1fr; gap: 20px; }
  .fu-page-cta { flex-direction: column; align-items: flex-start; }
  .fu-banner { padding: 120px 0 56px; }
  .fu-banner-port { display: none; }
}

@media (max-width: 640px) {
  .fu-container { width: calc(100% - 32px); }
  .fu-nav { padding: 16px; }
  .fu-nav-logo-text { display: none; }
  .fu-nav-logo-sub { display: none; }
  .fu-hero-actions { flex-direction: column; align-items: center; }
  .fu-hero-stats { flex-wrap: wrap; gap: 24px; justify-content: center; }
  .fu-trusted-logos { grid-template-columns: repeat(2, 1fr); }
  .fu-solutions-grid { grid-template-columns: 1fr; }
  .fu-about-numbers { grid-template-columns: repeat(2, 1fr); }
  .fu-news-grid { grid-template-columns: 1fr; }
  .fu-footer-grid { grid-template-columns: 1fr; }
  .fu-footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .fu-adv-grid, .fu-cap-grid { grid-template-columns: 1fr; }
  .fu-process { grid-template-columns: 1fr; }
  .fu-honors { grid-template-columns: repeat(2, 1fr); padding: 28px 20px; }
  .fu-honor-num { font-size: 28px; }
  .fu-banner { min-height: 260px; padding: 100px 0 44px; }
  .fu-banner-title { font-size: 34px; }
  .fu-page-cta { padding: 32px 26px; }
  .fu-msg-hint { flex-direction: column; align-items: flex-start; }
}

/* ====================================================================
   ============ 首页「逼格升维」美化段（仅作用于首页区块） ============
   ==================================================================== */

/* ---- 1. TRUSTED 徽章卡 ---- */
.fu-trusted-marquee .fu-partner-badge {
  margin-right: 24px;
  white-space: nowrap;
}
.fu-partner-badge {
  position: relative;
  padding: 14px 22px 12px;
  border-radius: 14px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(59,130,246,0.14);
  opacity: 0.75;
  transition: opacity .3s, transform .3s, border-color .3s, background .3s, box-shadow .3s;
}
.fu-partner-badge:hover {
  opacity: 1;
  transform: translateY(-2px);
  border-color: transparent;
  background: linear-gradient(160deg, #243349, #1b2436) padding-box, var(--fu-gradient) border-box;
  box-shadow: 0 12px 32px -14px rgba(14,165,233,0.5);
}
.fu-partner-badge-top {
  display: flex;
  align-items: center;
  gap: 8px;
}
.fu-partner-dot {
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--fu-gradient);
  box-shadow: 0 0 8px rgba(14,165,233,0.85);
}
.fu-partner-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--fu-ink-1);
}
.fu-partner-en {
  margin-top: 6px;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fu-ink-3);
}
.fu-partner-badge:hover .fu-partner-en { color: var(--fu-accent-c); }

/* ---- 2. 核心业务双卡：设备视觉 ---- */
.fu-biz-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 132px;
  margin: -6px 0 26px;
}
.fu-biz-visual-img {
  width: 150px;
  height: auto;
  object-fit: contain;
}
/* 摄像头同心圆镜头 */
.fu-lens {
  position: relative;
  width: 122px;
  height: 122px;
  display: grid;
  place-items: center;
}
.fu-lens-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(59,130,246,0.28);
  transition: border-color .5s, box-shadow .5s;
}
.fu-lens-ring.r1 { inset: 0; }
.fu-lens-ring.r2 { inset: 14px; border-color: rgba(96,165,250,0.4); }
.fu-lens-ring.r3 { inset: 28px; border-color: rgba(125,211,252,0.5); border-style: dashed; }
.fu-lens-core {
  position: absolute;
  inset: 40px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #7dd3fc, #0369a1 60%, #0b1220);
  box-shadow: 0 0 16px rgba(125,211,252,0.6), inset 0 0 6px rgba(255,255,255,0.45);
  transition: box-shadow .5s;
}
.fu-lens-highlight {
  position: absolute;
  top: 16%;
  left: 20%;
  width: 28%;
  height: 28%;
  border-radius: 50%;
  background: rgba(255,255,255,0.9);
  filter: blur(1.5px);
}
.fu-lens-breathe {
  position: absolute;
  inset: 30px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(14,165,233,0.45), transparent 70%);
  animation: fu-lens-breathe 3s ease-in-out infinite;
}
@keyframes fu-lens-breathe {
  0%, 100% { transform: scale(1); opacity: 0.55; }
  50% { transform: scale(1.5); opacity: 0.12; }
}
.fu-biz-card:hover .fu-lens-core {
  box-shadow: 0 0 30px rgba(125,211,252,0.95), inset 0 0 8px rgba(255,255,255,0.6);
}
.fu-biz-card:hover .fu-lens-ring.r2 { border-color: rgba(125,211,252,0.7); }
.fu-biz-card:hover .fu-lens-ring.r3 { border-color: rgba(6,182,212,0.75); box-shadow: 0 0 14px rgba(6,182,212,0.35); }
/* 投放屏屏幕模拟 */
.fu-screen { position: relative; }
.fu-screen-bezel {
  width: 196px;
  height: 122px;
  border-radius: 12px;
  padding: 8px;
  background: linear-gradient(160deg, #1b2740, #0b1220);
  border: 1px solid rgba(96,165,250,0.4);
  box-shadow: 0 14px 34px -16px rgba(2,6,23,0.9), inset 0 0 14px rgba(59,130,246,0.12);
  transition: border-color .5s, box-shadow .5s;
}
.fu-screen-inner {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 6px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 11px;
  background: linear-gradient(160deg, rgba(14,165,233,0.55) 0%, rgba(30,58,138,0.65) 55%, #0b1220 100%);
  transition: filter .5s;
}
.fu-screen-bar {
  height: 6px;
  border-radius: 3px;
  background: rgba(255,255,255,0.26);
}
.fu-screen-bar.w80 { width: 80%; }
.fu-screen-bar.w60 { width: 58%; }
.fu-screen-bar.w70 { width: 70%; }
.fu-screen-tile {
  position: absolute;
  right: 11px;
  top: 11px;
  width: 48px;
  height: 30px;
  border-radius: 4px;
  background: var(--fu-gradient);
  background-size: 200% 200%;
  animation: fu-flow 5s ease infinite;
  opacity: 0.9;
}
.fu-screen-shine {
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, transparent 32%, rgba(255,255,255,0.22) 50%, transparent 68%);
  transform: translateX(-110%);
  animation: fu-screen-shine 3.4s ease-in-out infinite;
}
@keyframes fu-screen-shine {
  0% { transform: translateX(-110%); }
  55%, 100% { transform: translateX(110%); }
}
.fu-screen-stand {
  width: 62px;
  height: 6px;
  margin: 6px auto 0;
  border-radius: 3px;
  background: rgba(96,165,250,0.28);
}
.fu-biz-card:hover .fu-screen-bezel {
  border-color: rgba(125,211,252,0.7);
  box-shadow: 0 18px 44px -16px rgba(14,165,233,0.5), inset 0 0 18px rgba(59,130,246,0.22);
}
.fu-biz-card:hover .fu-screen-inner { filter: brightness(1.22); }
/* features 图标点 chips */
.fu-chip-dot {
  display: inline-block;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--fu-accent-a);
  box-shadow: 0 0 6px rgba(14,165,233,0.9);
  margin-right: 7px;
  vertical-align: 1px;
}

/* ---- 3. 实时运营舱质感打磨 ---- */
.fu-ops-metric,
.fu-ops-monitor,
.fu-ops-feed {
  border: 1px solid transparent;
  background: linear-gradient(160deg, rgba(59,130,246,0.07), rgba(15,23,42,0.55)) padding-box,
    linear-gradient(160deg, rgba(14,165,233,0.45), rgba(59,130,246,0.12) 50%, rgba(6,182,212,0.4)) border-box;
}
.fu-ops-metric { background: linear-gradient(160deg, rgba(59,130,246,0.07), rgba(15,23,42,0.4)) padding-box, linear-gradient(160deg, rgba(14,165,233,0.4), rgba(59,130,246,0.1) 55%, rgba(6,182,212,0.35)) border-box; }
.fu-ops-monitor { background: #0b1220 padding-box, linear-gradient(160deg, rgba(14,165,233,0.5), rgba(59,130,246,0.14) 55%, rgba(6,182,212,0.45)) border-box; }
.fu-ops-feed { background: linear-gradient(160deg, rgba(59,130,246,0.05), rgba(15,23,42,0.45)) padding-box, linear-gradient(160deg, rgba(14,165,233,0.4), rgba(59,130,246,0.1) 55%, rgba(6,182,212,0.35)) border-box; }
.fu-ops-metric-num {
  font-family: ui-monospace, 'SF Mono', Consolas, 'Courier New', monospace;
  font-variant-numeric: tabular-nums;
}
.fu-ops-event-time {
  color: var(--fu-accent-c);
  opacity: 0.85;
  padding-right: 9px;
  margin-right: 1px;
  border-right: 1px solid rgba(148,163,184,0.18);
}
.fu-ops-status-beam {
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 1px;
  overflow: hidden;
  pointer-events: none;
}
.fu-ops-status-beam::after {
  content: '';
  position: absolute;
  top: 0;
  left: -30%;
  width: 30%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--fu-accent-a), transparent);
  animation: fu-beam 4.5s linear infinite;
}
@keyframes fu-beam {
  to { left: 110%; }
}

/* ---- 4. 产品优势舞台（首页版）---- */
.fu-adv-halo {
  position: absolute;
  top: 50%;
  left: 50%;
  border-radius: 50%;
  background: conic-gradient(from 0deg, transparent 0 62%, rgba(14,165,233,0.75) 82%, rgba(6,182,212,0.9) 92%, transparent 100%);
  -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 2px), #000 calc(100% - 1px));
  mask: radial-gradient(farthest-side, transparent calc(100% - 2px), #000 calc(100% - 1px));
  pointer-events: none;
}
.fu-adv-halo.h1 {
  width: 250px;
  height: 250px;
  margin: -125px 0 0 -125px;
  animation: fu-spin 9s linear infinite;
}
.fu-adv-halo.h2 {
  width: 330px;
  height: 330px;
  margin: -165px 0 0 -165px;
  opacity: 0.6;
  animation: fu-spin 15s linear infinite reverse;
}
.fu-adv-stage-home .fu-adv-device-glow {
  background: radial-gradient(circle, rgba(14,165,233,0.5), rgba(6,182,212,0.2) 45%, transparent 68%);
}
.fu-adv-stage-home .fu-adv-device-lens {
  box-shadow: 0 0 26px rgba(125,211,252,0.9), inset 0 0 8px rgba(255,255,255,0.6);
}
.fu-adv-spark {
  position: absolute;
  top: 50%;
  left: 0;
  width: 5px;
  height: 5px;
  margin-top: -2.5px;
  border-radius: 50%;
  background: #e0f2fe;
  box-shadow: 0 0 8px var(--fu-accent-a), 0 0 16px rgba(14,165,233,0.6);
  animation: fu-spark 2.8s ease-in-out infinite;
}
.fu-adv-line.right .fu-adv-spark { animation-delay: 1.2s; }
@keyframes fu-spark {
  0% { left: 0; opacity: 0; }
  12% { opacity: 1; }
  88% { opacity: 1; }
  100% { left: 100%; opacity: 0; }
}
.fu-adv-stage-home .fu-adv-line {
  background: linear-gradient(90deg, rgba(14,165,233,0.85), rgba(59,130,246,0.15));
  height: 2px;
  border-radius: 1px;
  transition: background .4s, box-shadow .4s;
}
.fu-adv-stage-home .fu-adv-item {
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(59,130,246,0.1);
  transition: background .4s, border-color .4s, transform .4s;
}
.fu-adv-stage-home .fu-adv-item:hover {
  background: rgba(59,130,246,0.08);
  border-color: rgba(59,130,246,0.35);
  transform: translateY(-2px);
}
.fu-adv-stage-home .fu-adv-item:hover .fu-adv-line {
  background: linear-gradient(90deg, #0ea5e9, rgba(6,182,212,0.5));
  box-shadow: 0 0 14px rgba(14,165,233,0.6);
}
.fu-adv-stage-home .fu-adv-item:hover .fu-adv-item-icon {
  box-shadow: 0 0 34px -4px rgba(14,165,233,0.85);
  border-color: rgba(125,211,252,0.7);
}

/* ---- 5. 解决方案编号大卡 ---- */
.fu-sol-card { padding-top: 46px; }
.fu-sol-topline {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  border-radius: 24px 24px 0 0;
  background: var(--fu-gradient);
  background-size: 200% 200%;
  animation: fu-flow 5s ease infinite;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .5s cubic-bezier(.2,.8,.2,1);
  z-index: 2;
}
.fu-sol-card:hover .fu-sol-topline,
.fu-sol-card.is-active .fu-sol-topline { transform: scaleX(1); }
.fu-sol-card .fu-sol-num {
  top: 12px;
  left: 24px;
  right: auto;
  font-size: 88px;
  color: rgba(255,255,255,0.055);
}
.fu-sol-card:hover .fu-sol-num,
.fu-sol-card.is-active .fu-sol-num { color: rgba(14,165,233,0.12); }
.fu-sol-badge {
  position: relative;
  z-index: 1;
  width: 72px;
  height: 72px;
  margin: 0 0 26px 10px;
  display: grid;
  place-items: center;
  border-radius: 20px;
  transform: rotate(45deg);
  background: linear-gradient(135deg, rgba(14,165,233,0.2), rgba(59,130,246,0.08));
  border: 1px solid rgba(59,130,246,0.45);
  box-shadow: 0 0 26px -8px rgba(14,165,233,0.7), inset 0 0 14px rgba(59,130,246,0.15);
  transition: box-shadow .4s, border-color .4s;
}
.fu-sol-card:hover .fu-sol-badge,
.fu-sol-card.is-active .fu-sol-badge {
  border-color: rgba(125,211,252,0.75);
  box-shadow: 0 0 36px -6px rgba(14,165,233,0.9), inset 0 0 18px rgba(59,130,246,0.25);
}
.fu-sol-badge .fu-sol-icon {
  transform: rotate(-45deg);
  font-size: 30px;
  margin: 0;
}
.fu-sol-img {
  display: block;
  width: 100px;
  height: auto;
  margin: -24px 0 27px -5px;
  position: relative;
  z-index: 1;
}
.fu-sol-detail-link {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 18px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--fu-accent-a);
  opacity: 0.8;
  transition: opacity .3s, gap .3s;
}
.fu-sol-card:hover .fu-sol-detail-link,
.fu-sol-card.is-active .fu-sol-detail-link { opacity: 1; gap: 10px; }
.fu-sol-card .fu-sol-arrow { display: none; }

/* ---- 6. 核心技术栈（首页版）---- */
.fu-tech-grid-home .fu-tech-layer {
  transition: background .35s, transform .35s, border-color .35s;
}
.fu-tech-grid-home .fu-tech-layer::before {
  transition: width .35s, box-shadow .35s;
}
.fu-tech-grid-home .fu-tech-layer:hover {
  background: rgba(59,130,246,0.07);
  border-color: rgba(59,130,246,0.25);
  transform: translateX(6px);
}
.fu-tech-grid-home .fu-tech-layer:hover::before {
  width: 6px;
  box-shadow: 0 0 14px rgba(14,165,233,0.7);
}
.fu-tech-grid-home .fu-tech-bar {
  box-shadow: inset 0 0 8px rgba(14,165,233,0.28);
}
.fu-tech-grid-home .fu-tech-bar-fill {
  position: relative;
}
.fu-tech-grid-home .fu-tech-bar-fill::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
  transform: translateX(-100%);
  animation: fu-bar-shine 2.6s ease-in-out infinite;
}
@keyframes fu-bar-shine {
  0% { transform: translateX(-100%); }
  60%, 100% { transform: translateX(100%); }
}
.fu-tech-bar-tip {
  position: absolute;
  right: -1px;
  top: 50%;
  width: 8px;
  height: 8px;
  margin-top: -4px;
  border-radius: 50%;
  background: #e0f2fe;
  box-shadow: 0 0 10px var(--fu-accent-a), 0 0 22px rgba(14,165,233,0.65);
  z-index: 1;
}
.fu-tech-grid-home .fu-tech-metric-pct {
  font-family: ui-monospace, 'SF Mono', Consolas, monospace;
  font-variant-numeric: tabular-nums;
}

/* ---- 7. 产品矩阵缩略视觉 ---- */
.fu-product-top {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}
.fu-product-meta { min-width: 0; }
.fu-product-card .fu-product-tag { margin-bottom: 8px; }
.fu-product-card .fu-product-name { margin-bottom: 0; font-size: 22px; }
.fu-product-en {
  margin-top: 6px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.24em;
  color: var(--fu-ink-3);
  transition: color .4s;
}
.fu-product-card:hover .fu-product-en { color: var(--fu-accent-c); }
.fu-pv {
  position: relative;
  flex: none;
  width: 122px;
  height: 96px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  overflow: hidden;
  background: radial-gradient(120% 100% at 50% 0%, rgba(59,130,246,0.14), rgba(11,18,32,0.6));
  border: 1px solid rgba(59,130,246,0.22);
  transition: border-color .4s, box-shadow .4s, transform .4s;
}
.fu-product-card:hover .fu-pv {
  border-color: rgba(59,130,246,0.55);
  box-shadow: 0 0 30px -8px rgba(14,165,233,0.6);
  transform: scale(1.05);
}
.fu-pv-lens { position: relative; width: 72px; height: 72px; display: grid; place-items: center; }
.fu-pv-lens .pl {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(125,211,252,0.45);
}
.fu-pv-lens .pl1 { inset: 0; }
.fu-pv-lens .pl2 { inset: 12px; border-color: rgba(96,165,250,0.55); }
.fu-pv-lens .pl3 { inset: 24px; border-style: dashed; }
.fu-pv-lens .pl-core {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #7dd3fc, #0369a1 60%, #0b1220);
  box-shadow: 0 0 12px rgba(125,211,252,0.85);
}
.fu-pv-screen {
  position: relative;
  width: 76px;
  height: 54px;
  border-radius: 7px;
  padding: 6px;
  background: linear-gradient(160deg, #1b2740, #0b1220);
  border: 1px solid rgba(96,165,250,0.45);
}
.fu-pv-screen .psc-line {
  display: block;
  height: 4px;
  border-radius: 2px;
  margin-bottom: 5px;
  background: rgba(125,211,252,0.4);
}
.fu-pv-screen .psc-line.l1 { width: 78%; }
.fu-pv-screen .psc-line.l2 { width: 55%; }
.fu-pv-screen .psc-line.l3 { width: 66%; background: var(--fu-gradient); }
.fu-pv-screen .psc-scan {
  position: absolute;
  left: 0;
  right: 0;
  top: -40%;
  height: 40%;
  background: linear-gradient(180deg, rgba(255,255,255,0.22), transparent);
  animation: fu-scan 3s linear infinite;
}
.fu-pv-svg { width: 100%; height: 100%; padding: 6px; }
.pv-node {
  fill: var(--fu-accent-c);
  filter: drop-shadow(0 0 4px rgba(6,182,212,0.9));
  animation: fu-pv-pulse 2.4s ease-in-out infinite;
}
.pv-node.hub { fill: var(--fu-accent-a); animation-delay: .6s; }
@keyframes fu-pv-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}

/* ---- 8. 关于区块（首页版）：使命宣言引用 ---- */
.fu-about-quote {
  margin: 4px 0 30px;
  padding: 12px 0 12px 20px;
  border: 0;
  border-left: 2px solid;
  border-image: linear-gradient(180deg, var(--fu-accent-a), var(--fu-accent-c)) 1;
  background: linear-gradient(90deg, rgba(59,130,246,0.08), transparent 65%);
  font-style: italic;
  font-size: 15px;
  line-height: 1.85;
  color: var(--fu-ink-1);
}

/* ---- 9. 全球服务网络数据带 ---- */
.fu-netband {
  position: relative;
  padding: 76px 0;
  overflow: hidden;
  background: linear-gradient(180deg, #0b1220 0%, #101a2e 50%, #0b1220 100%);
}
.fu-netband::before,
.fu-netband::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(59,130,246,0.55) 20%, rgba(6,182,212,0.7) 50%, rgba(59,130,246,0.55) 80%, transparent);
}
.fu-netband::before { top: 0; }
.fu-netband::after { bottom: 0; }
.fu-netband-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(59,130,246,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59,130,246,0.06) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(ellipse 75% 120% at 50% 50%, #000 25%, transparent 78%);
  mask-image: radial-gradient(ellipse 75% 120% at 50% 50%, #000 25%, transparent 78%);
  pointer-events: none;
}
.fu-netband-beam {
  position: absolute;
  left: -30%;
  top: 50%;
  width: 30%;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(14,165,233,0.75), transparent);
  filter: blur(1px);
  animation: fu-netband-beam 9s linear infinite;
  pointer-events: none;
}
@keyframes fu-netband-beam {
  to { left: 110%; }
}
.fu-netband-inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.fu-netband-item {
  text-align: center;
  padding: 8px 12px;
}
.fu-netband-item + .fu-netband-item {
  border-left: 1px solid rgba(59,130,246,0.14);
}
.fu-netband-num {
  font-size: clamp(40px, 4.2vw, 58px);
  font-weight: 900;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.fu-netband-label {
  margin-top: 12px;
  font-size: 14px;
  font-weight: 600;
  color: var(--fu-ink-1);
  letter-spacing: 0.04em;
}
.fu-netband-en {
  margin-top: 5px;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fu-ink-3);
}

/* ---- 升维段响应式 ---- */
@media (max-width: 900px) {
  .fu-netband-inner { grid-template-columns: repeat(2, 1fr); gap: 36px 16px; }
  .fu-netband-item:nth-child(3) { border-left: none; }
  .fu-adv-halo { display: none; }
  .fu-biz-visual { min-height: 110px; margin-bottom: 18px; }
  .fu-lens { width: 96px; height: 96px; }
  .fu-lens-core { inset: 32px; }
  .fu-lens-ring.r2 { inset: 11px; }
  .fu-lens-ring.r3 { inset: 22px; }
  .fu-screen-bezel { width: 158px; height: 100px; }
}
@media (max-width: 640px) {
  .fu-product-top { flex-direction: column; align-items: flex-start; gap: 14px; }
  .fu-partner-en { display: none; }
}

/* ---- 升维段动效降级 ---- */
@media (prefers-reduced-motion: reduce) {
  .fu-lens-breathe,
  .fu-screen-shine,
  .fu-adv-halo,
  .fu-adv-spark,
  .fu-pv-screen .psc-scan,
  .pv-node,
  .fu-netband-beam,
  .fu-tech-grid-home .fu-tech-bar-fill::after,
  .fu-ops-status-beam::after {
    animation: none !important;
  }
  .fu-screen-shine { display: none; }
  .fu-adv-spark { display: none; }
}

/* ====================================================================
   ============ Mega Menu 二级子页（SubDetailPage）样式段 ============
   ==================================================================== */

/* ---- 面包屑第三级 ---- */
.fu-breadcrumb-current { color: var(--fu-ink-1); }

/* ---- 父页面「进入详情页」链接与入口条 ---- */
.fu-detail-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--fu-accent-c);
  cursor: pointer;
  transition: gap .3s, color .3s;
}
.fu-detail-link:hover { gap: 14px; color: var(--fu-accent-a); }
.fu-detail-actions {
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
  margin-top: 26px;
}
.fu-sub-entries {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 36px;
}
.fu-sub-entry {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--fu-ink-1);
  background: rgba(59,130,246,0.08);
  border: 1px solid rgba(59,130,246,0.22);
  cursor: pointer;
  transition: all .3s;
}
.fu-sub-entry:hover {
  color: #fff;
  border-color: rgba(59,130,246,0.55);
  background: rgba(59,130,246,0.16);
  box-shadow: 0 8px 24px -12px rgba(14,165,233,0.6);
  transform: translateY(-2px);
}
.fu-sub-entry span { color: var(--fu-accent-c); transition: transform .3s; }
.fu-sub-entry:hover span { transform: translateX(4px); }

/* ---- 子页导语区 ---- */
.fu-sub-intro {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}
.fu-sub-intro-text .fu-sub-para:first-child { margin-top: 0; }
.fu-sub-intro-actions {
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
  margin-top: 28px;
}
.fu-sub-btn { padding: 14px 28px; font-size: 14px; cursor: pointer; }
.fu-sub-intro-visual {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: 44px 28px 36px;
  border-radius: 24px;
  overflow: hidden;
  background:
    radial-gradient(ellipse 70% 60% at 30% 25%, rgba(14,165,233,0.28), transparent 65%),
    radial-gradient(ellipse 60% 50% at 75% 80%, rgba(6,182,212,0.22), transparent 60%),
    linear-gradient(160deg, #16213a 0%, #0e1526 100%);
  border: 1px solid rgba(59,130,246,0.2);
  min-height: 320px;
}
.fu-sub-intro-icon { font-size: 44px; line-height: 1; filter: drop-shadow(0 0 14px rgba(14,165,233,0.55)); }
.fu-sub-intro-icon:has(img) { filter: none; }
img.fu-sub-intro-icon-img { width: 44px; height: 44px; object-fit: contain; display: inline-block; }
.fu-sub-intro-tag {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--fu-accent-c);
}

/* ---- 子页 CSS 视觉卡 ---- */
.fu-sub-visual {
  position: relative;
  width: 100%;
  min-height: 220px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 70% at 50% 20%, rgba(59,130,246,0.16), transparent 70%),
    linear-gradient(160deg, #141e35 0%, #0d1424 100%);
  border: 1px solid rgba(59,130,246,0.22);
}
.fu-sub-visual-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(59,130,246,0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59,130,246,0.08) 1px, transparent 1px);
  background-size: 30px 30px;
  -webkit-mask-image: radial-gradient(ellipse 90% 90% at 50% 45%, #000 15%, transparent 80%);
  mask-image: radial-gradient(ellipse 90% 90% at 50% 45%, #000 15%, transparent 80%);
  pointer-events: none;
}
.fu-sub-visual .fu-pv-svg { width: 62%; max-width: 260px; height: auto; }
.fu-sub-visual-cell {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 260px;
}
/* 六边形光环视觉（shield / eco / network / building 共用，图标不同） */
.fu-sub-hex { position: relative; width: 150px; height: 150px; display: grid; place-items: center; }
.fu-sub-hex-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px dashed rgba(59,130,246,0.4);
  animation: fu-sub-hex-spin 18s linear infinite;
}
.fu-sub-hex-ring::before {
  content: '';
  position: absolute;
  top: -4px; left: 50%;
  width: 8px; height: 8px;
  margin-left: -4px;
  border-radius: 50%;
  background: var(--fu-accent-c);
  box-shadow: 0 0 10px rgba(6,182,212,0.9);
}
.fu-sub-hex-ring.reverse {
  inset: 20px;
  border-color: rgba(6,182,212,0.32);
  animation-direction: reverse;
  animation-duration: 12s;
}
.fu-sub-hex-ring.reverse::before { background: var(--fu-accent-a); box-shadow: 0 0 10px rgba(14,165,233,0.9); }
.fu-sub-hex-icon {
  position: relative;
  font-size: 52px;
  line-height: 1;
  filter: drop-shadow(0 0 16px rgba(14,165,233,0.6));
}
.fu-sub-hex-icon:has(img) { filter: none; }
img.fu-sub-hex-icon-img { width: 80px; height: 80px; object-fit: contain; display: inline-block; }
@keyframes fu-sub-hex-spin { to { transform: rotate(360deg); } }

/* ---- 子页小节标题（左侧渐变竖条） ---- */
.fu-sub-heading {
  position: relative;
  padding-left: 18px;
  font-size: clamp(22px, 2.4vw, 30px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--fu-ink-0);
  margin: 0 0 22px;
  line-height: 1.3;
}
.fu-sub-heading::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.22em;
  bottom: 0.12em;
  width: 4px;
  border-radius: 4px;
  background: var(--fu-gradient);
  box-shadow: 0 0 12px rgba(14,165,233,0.55);
}

/* ---- 小节正文 ---- */
.fu-sub-lead {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.8;
  color: var(--fu-ink-1);
  margin: 0 0 14px;
}
.fu-sub-para {
  font-size: 14.5px;
  line-height: 1.95;
  color: var(--fu-ink-2);
  margin: 0 0 14px;
}
.fu-sub-para:last-child { margin-bottom: 0; }

/* ---- bullets 要点卡网格 ---- */
.fu-sub-bullets {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-top: 22px;
}
.fu-sub-bullet {
  position: relative;
  padding: 22px 24px;
  border-radius: 16px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(59,130,246,0.16);
  transition: transform .35s, border-color .35s, box-shadow .35s;
}
.fu-sub-bullet::before {
  content: '';
  position: absolute;
  left: 0; top: 14px; bottom: 14px;
  width: 3px;
  border-radius: 3px;
  background: var(--fu-gradient);
  opacity: 0.75;
}
.fu-sub-bullet:hover {
  transform: translateY(-3px);
  border-color: rgba(59,130,246,0.45);
  box-shadow: 0 14px 36px -16px rgba(14,165,233,0.45);
}
.fu-sub-bullet-title { font-size: 15px; font-weight: 800; color: var(--fu-ink-0); margin-bottom: 8px; }
.fu-sub-bullet-desc { font-size: 13px; line-height: 1.8; color: var(--fu-ink-2); margin: 0; }

/* ---- stats 数据横条 ---- */
.fu-sub-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 24px;
  padding: 26px 28px;
  border-radius: 18px;
  background:
    radial-gradient(ellipse 60% 100% at 50% 0%, rgba(59,130,246,0.1), transparent 70%),
    rgba(255,255,255,0.03);
  border: 1px solid rgba(59,130,246,0.18);
}
.fu-sub-stat { text-align: center; }
.fu-sub-stat + .fu-sub-stat { border-left: 1px solid rgba(59,130,246,0.14); }
.fu-sub-stat-num { font-size: clamp(24px, 2.6vw, 34px); font-weight: 900; line-height: 1.15; font-variant-numeric: tabular-nums; }
.fu-sub-stat-label { margin-top: 6px; font-size: 12px; color: var(--fu-ink-2); letter-spacing: 0.04em; }

/* ---- steps 流程（复用 fu-process-step，自适应列数） ---- */
.fu-sub-steps { margin-top: 24px; }
.fu-sub-steps .fu-process-step { padding: 24px 16px; }

/* ---- spec 表在小节内的间距 ---- */
.fu-section .fu-spec-table { margin-top: 6px; }

/* ---- 相关栏目卡条 ---- */
.fu-sub-related-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.fu-sub-related-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 20px 22px;
  border-radius: 16px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(59,130,246,0.16);
  cursor: pointer;
  transition: transform .35s, border-color .35s, box-shadow .35s, background .35s;
}
.fu-sub-related-card:hover {
  transform: translateY(-3px);
  border-color: rgba(59,130,246,0.5);
  background: rgba(59,130,246,0.07);
  box-shadow: 0 14px 36px -16px rgba(14,165,233,0.5);
}
.fu-sub-related-label { font-size: 14px; font-weight: 700; color: var(--fu-ink-1); }
.fu-sub-related-arrow { font-size: 16px; color: var(--fu-accent-c); transition: transform .3s; }
.fu-sub-related-card:hover .fu-sub-related-arrow { transform: translateX(5px); }

/* ---- 子页响应式 ---- */
@media (max-width: 1024px) {
  .fu-sub-intro { grid-template-columns: 1fr; gap: 36px; }
  .fu-sub-intro-visual { min-height: 260px; }
  .fu-sub-related-row { grid-template-columns: repeat(2, 1fr); }
  .fu-sub-stats { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .fu-sub-stat:nth-child(3) { border-left: none; }
  .fu-sub-steps { grid-template-columns: repeat(2, 1fr) !important; }
  .fu-sub-steps .fu-process-arrow { display: none; }
}
@media (max-width: 900px) {
  .fu-sub-bullets { grid-template-columns: 1fr; }
  .fu-sub-visual-cell { min-height: 200px; }
}
@media (max-width: 640px) {
  .fu-sub-related-row { grid-template-columns: 1fr; }
  .fu-sub-stats { grid-template-columns: 1fr 1fr; padding: 20px; }
  .fu-sub-steps { grid-template-columns: 1fr !important; }
  .fu-sub-heading { font-size: 21px; }
}

/* ---- 子页动效降级 ---- */
@media (prefers-reduced-motion: reduce) {
  .fu-sub-hex-ring,
  .fu-sub-hex-ring.reverse { animation: none !important; }
}