/* ========================================
   智云科技 - 纯 CSS 高性能方案
   ======================================== */

:root {
  --bg-deep: #050a14;
  --bg-section: #080f1e;
  --bg-card: rgba(255,255,255,0.03);
  --bg-card-hover: rgba(255,255,255,0.06);
  --border: rgba(255,255,255,0.08);
  --border-hover: rgba(255,255,255,0.15);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #00d4ff;
  --accent-purple: #8b5cf6;
  --accent-green: #22c55e;
  --accent-orange: #f97316;
  --glow: rgba(0,212,255,0.12);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.25s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
               "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection { background: rgba(0,212,255,0.25); color: #fff; }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb { background: #1e293b; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #334155; }

/* Container */
.container {
  width: 100%;
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 24px;
}
@media (min-width: 1280px) { .container { padding: 0 48px; } }
@media (min-width: 1920px) { .container { padding: 0 64px; } }

/* Navbar */
.navbar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: 64px;
  display: flex;
  align-items: center;
  transition: background var(--transition), box-shadow var(--transition);
}
.navbar.scrolled {
  background: rgba(5,10,20,0.85);
  box-shadow: 0 1px 0 rgba(255,255,255,0.05);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 24px;
}
@media (min-width: 1280px) { .navbar-inner { padding: 0 48px; } }

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: #fff;
  font-size: 20px;
  font-weight: 700;
}
.logo-icon {
  width: 32px; height: 32px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent), var(--accent-purple));
  display: flex; align-items: center; justify-content: center;
}
.logo-icon svg { width: 18px; height: 18px; color: #fff; }
.logo span.accent { color: var(--accent); }

.nav-links {
  display: none;
  align-items: center;
  gap: 4px;
}
@media (min-width: 768px) { .nav-links { display: flex; } }

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}
.nav-links a:hover { color: #fff; background: rgba(255,255,255,0.05); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--accent);
  color: #000;
}
.btn-primary:hover { box-shadow: 0 4px 20px rgba(0,212,255,0.3); }

.btn-outline {
  background: var(--bg-card);
  color: #fff;
  border: 1px solid var(--border);
}
.btn-outline:hover { background: var(--bg-card-hover); border-color: var(--border-hover); }

.btn-lg { padding: 14px 28px; font-size: 15px; border-radius: var(--radius); }

/* Mobile menu */
.menu-toggle {
  display: block;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 4px;
}
@media (min-width: 768px) { .menu-toggle { display: none; } }

.mobile-menu {
  display: none;
  position: fixed;
  inset: 64px 0 0 0;
  background: rgba(5,10,20,0.97);
  padding: 16px 24px;
  z-index: 99;
}
.mobile-menu.open { display: block; }
.mobile-menu a {
  display: block;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}
.mobile-menu a:hover { background: rgba(255,255,255,0.05); color: #fff; }

/* Sections */
.section {
  position: relative;
  padding: 96px 0;
}
@media (min-width: 1024px) { .section { padding: 120px 0; } }

/* Grid background */
.grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

/* Glow orbs */
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  pointer-events: none;
  opacity: 0.4;
}
.orb-1 { width: 400px; height: 400px; background: var(--accent); top: 10%; left: -5%; }
.orb-2 { width: 350px; height: 350px; background: var(--accent-purple); bottom: 15%; right: -5%; }
.orb-3 { width: 500px; height: 500px; background: rgba(0,100,255,0.15); top: 40%; left: 50%; transform: translate(-50%, -50%); }

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 48px;
  padding-bottom: 48px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}
.badge-dot {
  width: 6px; height: 6px;
  background: var(--accent-green);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.title {
  font-size: clamp(36px, 6vw, 72px);
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}
.title .gradient {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-purple) 50%, var(--accent) 100%);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradient-flow 6s ease infinite;
}

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

.subtitle {
  font-size: clamp(16px, 2vw, 20px);
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto 24px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
}

/* Dashboard mockup */
.dashboard {
  position: relative;
  max-width: 1400px;
  margin: 0 auto;
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255,255,255,0.04) 0%, rgba(255,255,255,0.01) 100%);
  border: 1px solid var(--border);
  overflow: hidden;
}
.dashboard::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, var(--bg-deep), transparent 40%);
  pointer-events: none;
  z-index: 2;
}

.dash-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
}
.dash-dot { width: 10px; height: 10px; border-radius: 50%; }
.dash-dot.r { background: #ef4444; }
.dash-dot.y { background: #eab308; }
.dash-dot.g { background: #22c55e; }
.dash-url {
  flex: 1;
  text-align: center;
  font-size: 11px;
  color: var(--text-muted);
  background: rgba(255,255,255,0.03);
  padding: 4px 12px;
  border-radius: 4px;
  max-width: 280px;
  margin: 0 auto;
}

.dash-body {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 16px;
  padding: 20px;
}
@media (max-width: 640px) { .dash-body { grid-template-columns: 1fr; } }

.dash-sidebar { display: flex; flex-direction: column; gap: 8px; }
.dash-sidebar .item { height: 28px; border-radius: 4px; background: rgba(255,255,255,0.04); }
.dash-sidebar .item.active { background: rgba(0,212,255,0.12); width: 80%; }
.dash-sidebar .item:nth-child(7) { margin-top: 24px; }

.dash-main { display: flex; flex-direction: column; gap: 16px; }

.dash-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
@media (max-width: 640px) { .dash-stats { grid-template-columns: repeat(2, 1fr); } }

.stat-card {
  padding: 16px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
}
.stat-card .label { font-size: 11px; color: var(--text-muted); margin-bottom: 4px; }
.stat-card .value { font-size: 20px; font-weight: 700; }

.dash-charts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
@media (max-width: 640px) { .dash-charts { grid-template-columns: 1fr; } }

.chart-box {
  padding: 16px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
}
.chart-box .head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.chart-box .head span { font-size: 13px; color: var(--text-secondary); }
.chart-box .head .tag { font-size: 11px; color: var(--accent-green); }

.bars { display: flex; align-items: flex-end; gap: 4px; height: 100px; }
.bar {
  flex: 1;
  border-radius: 2px 2px 0 0;
  background: linear-gradient(to top, rgba(0,212,255,0.5), rgba(0,212,255,0.8));
  min-height: 8px;
}

.doughnut { width: 80px; height: 80px; margin: 0 auto; position: relative; }
.doughnut svg { transform: rotate(-90deg); }
.doughnut-text {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
}

.dash-logs {
  padding: 16px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
}
.dash-logs .head { font-size: 13px; color: var(--text-secondary); margin-bottom: 12px; }
.log-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  border-radius: 4px;
  background: rgba(255,255,255,0.02);
  margin-bottom: 6px;
  font-size: 12px;
}
.log-row .msg { color: var(--text-secondary); }
.log-row .time { color: var(--text-muted); font-size: 11px; }
.log-row .status { font-size: 11px; }
.status-ok { color: var(--accent-green); }
.status-warn { color: var(--accent-orange); }

/* Section header */
.section-header { text-align: center; margin-bottom: 64px; }
.section-tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 100px;
  font-size: 13px;
  color: var(--accent);
  background: rgba(0,212,255,0.08);
  border: 1px solid rgba(0,212,255,0.15);
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.2;
}
.section-desc {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* Feature cards */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.feature-card {
  position: relative;
  padding: 28px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
  cursor: default;
}
.feature-card:hover {
  transform: translateY(-4px);
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
}
.feature-card .icon-wrap {
  width: 44px; height: 44px;
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
  background: rgba(255,255,255,0.04);
}
.feature-card .icon-wrap svg { width: 22px; height: 22px; }
.feature-card h3 { font-size: 17px; font-weight: 600; margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }

/* Product Carousel */
.product-carousel-wrap {
  overflow: hidden;
  position: relative;
  width: 100%;
}
.product-carousel-track {
  display: flex;
  width: max-content;
  animation: product-scroll 18s linear infinite;
}
.product-carousel-wrap:hover .product-carousel-track {
  animation-play-state: paused;
}
@keyframes product-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}
.product-carousel-item {
  width: 560px;
  flex-shrink: 0;
}
.product-carousel-item img {
  width: 100%;
  height: auto;
  display: block;
}
@media (max-width: 1024px) {
  .product-carousel-item { width: 45vw; }
}
@media (max-width: 640px) {
  .product-carousel-item { width: 80vw; }
}

/* Solutions Page */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.solution-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: all var(--transition);
}
.solution-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}
.solution-header {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 16px;
}
.solution-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  flex-shrink: 0;
}
.solution-header h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}
.solution-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.solution-tags .tag {
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 4px;
  background: rgba(255,255,255,0.06);
  color: var(--text-dim);
  border: 1px solid var(--border);
}
.solution-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}
.solution-features {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.sf-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-dim);
}
@media (max-width: 1024px) {
  .solutions-grid { grid-template-columns: 1fr; }
}

/* Solutions Page - Rich Media */
.solution-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 100px;
}
.solution-block-content {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.solution-block-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: fit-content;
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  color: #fff;
}
.solution-block-title {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.3;
}
.solution-block-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
}
.solution-block-features {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 4px;
}
.sbf-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-dim);
}
.solution-block-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}
.solution-block-tags .tag {
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 6px;
  background: rgba(255,255,255,0.05);
  color: var(--text-dim);
  border: 1px solid var(--border);
}
.solution-block-media {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
  background: var(--bg-card);
}
.sol-carousel-wrap {
  overflow: hidden;
  position: relative;
}
.sol-carousel-track {
  display: flex;
  width: max-content;
  animation: sol-scroll 20s linear infinite;
}
.sol-carousel-wrap:hover .sol-carousel-track {
  animation-play-state: paused;
}
@keyframes sol-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}
.sol-carousel-item {
  width: 560px;
  flex-shrink: 0;
}
.sol-carousel-item img {
  width: 100%;
  height: auto;
  display: block;
}
@media (max-width: 1024px) {
  .sol-carousel-item { width: 100%; }
}
.sol-video-wrap {
  position: relative;
  background: #000;
  aspect-ratio: 16 / 9;
}
.sol-video-wrap video {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
}
@media (max-width: 1024px) {
  .solution-block {
    grid-template-columns: 1fr;
    gap: 32px;
    margin-bottom: 64px;
  }
  .solution-block-media {
    order: -1;
  }
}

/* Products */
.product-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 48px;
}

.tab-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
}
.tab-btn:hover { color: #fff; background: rgba(255,255,255,0.04); }
.tab-btn.active {
  color: #fff;
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.12);
}

#product-panels .product-panel { display: none; }
#product-panels .product-panel.active { display: grid; }

.product-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
@media (max-width: 1024px) { .product-layout { grid-template-columns: 1fr; gap: 40px; } }

.product-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  color: #fff;
  margin-bottom: 20px;
}

.product-title { font-size: 28px; font-weight: 700; margin-bottom: 16px; }
.product-desc { font-size: 16px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 28px; }

.check-list { display: flex; flex-direction: column; gap: 12px; margin-bottom: 32px; }
.check-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: var(--text-secondary);
}
.check-icon {
  width: 20px; height: 20px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.check-icon svg { width: 12px; height: 12px; color: #fff; }

/* Architecture */
.arch-stack {
  max-width: 900px;
  margin: 0 auto 48px;
  position: relative;
}
.arch-line {
  position: absolute;
  left: 28px;
  top: 36px;
  bottom: 36px;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--accent-purple), #ec4899);
  opacity: 0.4;
}
@media (max-width: 640px) { .arch-line { left: 24px; } }

.arch-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 24px;
  margin-bottom: 12px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
  transition: all var(--transition);
  position: relative;
}
.arch-item:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
}
.arch-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  z-index: 1;
}
.arch-icon svg { width: 24px; height: 24px; }
.arch-item h4 { font-size: 16px; font-weight: 600; margin-bottom: 2px; }
.arch-item p { font-size: 13px; color: var(--text-muted); }

/* Testimonials */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 48px;
}
@media (max-width: 640px) { .stats-row { grid-template-columns: repeat(2, 1fr); } }

.stat-box {
  text-align: center;
  padding: 24px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
}
.stat-box .num {
  font-size: 32px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 4px;
}
.stat-box .label { font-size: 13px; color: var(--text-muted); }

.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 1024px) { .review-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .review-grid { grid-template-columns: 1fr; } }

.review-card {
  padding: 24px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.review-card:hover { background: var(--bg-card-hover); }
.review-stars { display: flex; gap: 2px; margin-bottom: 14px; }
.review-stars svg { width: 14px; height: 14px; color: #eab308; fill: #eab308; }
.review-text { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 20px; }
.review-author { display: flex; align-items: center; gap: 12px; }
.review-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: #fff;
}
.review-author .name { font-size: 14px; font-weight: 600; }
.review-author .role { font-size: 12px; color: var(--text-muted); }

/* CTA */
.cta-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
@media (max-width: 1024px) { .cta-grid { grid-template-columns: 1fr; gap: 48px; } }

.contact-item {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}
.contact-icon {
  width: 40px; height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(0,212,255,0.08);
  display: flex; align-items: center; justify-content: center;
}
.contact-icon svg { width: 18px; height: 18px; color: var(--accent); }
.contact-item .label { font-size: 12px; color: var(--text-muted); }
.contact-item .value { font-size: 15px; color: #fff; }

.form-card {
  padding: 32px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
}
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; color: var(--text-secondary); margin-bottom: 6px; }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  color: #fff;
  font-size: 14px;
  outline: none;
  transition: border-color var(--transition);
  font-family: inherit;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: rgba(0,212,255,0.4); }
.form-group select option { background: #0f172a; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 640px) { .form-row { grid-template-columns: 1fr; } }

.form-note { font-size: 12px; color: var(--text-muted); text-align: center; margin-top: 12px; }

/* Footer */
.footer { border-top: 1px solid var(--border); padding: 64px 0 32px; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(4, 1fr);
  gap: 40px;
  margin-bottom: 48px;
}
@media (max-width: 1024px) { .footer-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 640px) { .footer-grid { grid-template-columns: repeat(2, 1fr); } }

.footer-brand p { font-size: 14px; color: var(--text-muted); max-width: 280px; margin: 14px 0 20px; line-height: 1.6; }
.footer-social { display: flex; gap: 10px; }
.footer-social a {
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.04);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted);
  transition: all var(--transition);
}
.footer-social a:hover { color: #fff; background: rgba(255,255,255,0.08); }
.footer-social a svg { width: 16px; height: 16px; }

.footer h4 { font-size: 14px; font-weight: 600; margin-bottom: 16px; }
.footer ul { list-style: none; }
.footer ul li { margin-bottom: 10px; }
.footer ul a { font-size: 13px; color: var(--text-muted); text-decoration: none; transition: color var(--transition); }
.footer ul a:hover { color: var(--accent); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom a { color: var(--text-muted); text-decoration: none; transition: color var(--transition); }
.footer-bottom a:hover { color: var(--text-secondary); }

/* Hero Carousel */
.hero-carousel-wrap {
  overflow: hidden;
  position: relative;
  border-radius: var(--radius);
}
.hero-carousel-track {
  display: flex;
  width: max-content;
  animation: hero-scroll 20s linear infinite;
}
.hero-carousel-wrap:hover .hero-carousel-track {
  animation-play-state: paused;
}
@keyframes hero-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}
.hero-carousel-item {
  width: 1200px;
  flex-shrink: 0;
  background: var(--bg-card);
}
.hero-carousel-item img {
  width: 100%;
  height: auto;
  display: block;
}
.hero-video-wrap {
  display: none;
  position: relative;
  background: #000;
  border-radius: var(--radius);
  aspect-ratio: 16 / 9;
}
.hero-video-wrap video {
  width: 100%;
  height: 100%;
  display: block;
  border-radius: var(--radius);
  object-fit: contain;
}
.hero-video-close {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(0,0,0,0.6);
  border: 1px solid rgba(255,255,255,0.2);
  color: #fff;
  padding: 6px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  z-index: 10;
  transition: background 0.2s;
}
.hero-video-close:hover {
  background: rgba(0,0,0,0.85);
}
@media (max-width: 1240px) {
  .hero-carousel-item { width: 90vw; }
}

/* Carousel */
.carousel-wrap {
  margin-top: 48px;
  overflow: hidden;
  position: relative;
  mask-image: linear-gradient(to right, transparent, black 8%, black 92%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 8%, black 92%, transparent);
}
.carousel-track {
  display: flex;
  gap: 20px;
  width: max-content;
  animation: carousel-scroll 30s linear infinite;
}
.carousel-wrap:hover .carousel-track {
  animation-play-state: paused;
}
@keyframes carousel-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}
.carousel-item {
  width: 480px;
  height: 300px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  flex-shrink: 0;
  background: var(--bg-card);
}
.carousel-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
@media (max-width: 640px) {
  .carousel-item { width: 320px; height: 200px; }
}

/* Download */
.download-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
}
@media (max-width: 768px) { .download-grid { grid-template-columns: 1fr; } }

.download-card {
  padding: 32px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
  text-align: center;
  transition: all var(--transition);
}
.download-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-4px);
}
.download-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius);
  background: rgba(0,212,255,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  color: var(--accent);
}
.download-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 6px; }
.download-card .version { font-size: 13px; color: var(--text-muted); margin-bottom: 8px; }

.download-note {
  text-align: center;
  margin-top: 32px;
  font-size: 13px;
  color: var(--text-muted);
}
.download-note p { display: flex; align-items: center; justify-content: center; gap: 6px; flex-wrap: wrap; }

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Scroll down indicator */
.scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  font-size: 12px;
  z-index: 2;
  animation: bounce 2s infinite;
}
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

/* ============================================================
   ✦ 视觉精修层 (Refinement Layer)
   后置覆盖式增强，保持青色主色调与原结构；整段可删除以回退。
   ============================================================ */
:root {
  --border: rgba(255,255,255,0.09);
  --border-hover: rgba(0,212,255,0.38);
  --text-secondary: #aab6c6;
  --radius: 14px;
  --radius-sm: 9px;
  --transition: 0.3s cubic-bezier(0.22, 1, 0.36, 1);
  --shadow-card: 0 10px 30px -14px rgba(0,0,0,0.65);
  --shadow-hover: 0 26px 60px -22px rgba(0,0,0,0.75), 0 0 0 1px rgba(0,212,255,0.10);
  --shadow-glow: 0 10px 34px rgba(0,212,255,0.28);
}

/* 锚点跳转不被固定导航遮挡 */
html { scroll-padding-top: 88px; }

/* 更有纵深的背景：底色 + 顶部/右上柔光（固定） */
body {
  background:
    radial-gradient(1100px 560px at 50% -240px, rgba(0,212,255,0.10), transparent 70%),
    radial-gradient(820px 460px at 100% -60px, rgba(139,92,246,0.08), transparent 62%),
    var(--bg-deep);
  background-attachment: fixed;
  text-rendering: optimizeLegibility;
  -moz-osx-font-smoothing: grayscale;
  letter-spacing: 0.01em;
}

/* 精修滚动条 */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-thumb { background: #243246; border-radius: 6px; border: 2px solid var(--bg-deep); }
::-webkit-scrollbar-thumb:hover { background: #34465e; }

/* 容器收窄，行长更舒适、版面更高级 */
.container, .navbar-inner { max-width: 1280px; }
@media (min-width: 1280px) { .container, .navbar-inner { padding: 0 40px; } }

/* 导航：玻璃拟态 + 细腻滚动态 */
.navbar { height: 68px; }
.navbar.scrolled {
  background: rgba(8,13,24,0.72);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  box-shadow: 0 1px 0 rgba(255,255,255,0.06), 0 10px 30px -18px rgba(0,0,0,0.85);
}
.nav-links a { font-weight: 500; }
.logo-icon { box-shadow: 0 6px 18px rgba(0,212,255,0.35); }

/* 按钮：渐变主按钮 + 发光悬停 + 可见聚焦 */
.btn { border-radius: 12px; font-weight: 600; }
.btn-primary { background: linear-gradient(135deg, var(--accent), #38bdf8); color: #04222b; }
.btn-primary:hover { box-shadow: var(--shadow-glow); transform: translateY(-2px); }
.btn-outline { backdrop-filter: blur(6px); }
.btn:focus-visible, a:focus-visible, button:focus-visible,
input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid rgba(0,212,255,0.6);
  outline-offset: 2px;
}

/* 标题排版：更紧凑有力 */
.title { line-height: 1.12; letter-spacing: -0.03em; }
.section-title { line-height: 1.15; letter-spacing: -0.02em; }
.subtitle { color: var(--text-secondary); }

/* 区块小标签：大写 + 字距，更精致 */
.section-tag {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 12px;
  font-weight: 600;
  background: rgba(0,212,255,0.08);
  border-color: rgba(0,212,255,0.22);
}
.section-header { margin-bottom: 56px; }

/* hero 光球：更柔、缓慢漂移 */
.orb { opacity: 0.5; filter: blur(120px); }
.orb-1 { animation: drift-orb 16s ease-in-out infinite; }
.orb-2 { animation: drift-orb 22s ease-in-out infinite reverse; }
@keyframes drift-orb {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(24px, -28px); }
}

/* 卡片统一质感：阴影 + 悬停发光 + 上移 */
.feature-card, .download-card, .review-card, .arch-item, .stat-box, .form-card, .solution-card {
  box-shadow: var(--shadow-card);
}
.feature-card, .download-card, .review-card, .form-card { backdrop-filter: blur(6px); }
.feature-card:hover, .download-card:hover, .review-card:hover, .solution-card:hover, .stat-box:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-hover);
  transform: translateY(-6px);
}
.feature-card { padding: 30px; }
.feature-card .icon-wrap {
  background: linear-gradient(135deg, rgba(0,212,255,0.12), rgba(139,92,246,0.10));
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.06);
}
.feature-card h3 { font-size: 18px; font-weight: 700; letter-spacing: -0.01em; }

/* 统计数字更醒目 */
.stat-box .num { font-size: 36px; letter-spacing: -0.02em; }

/* 表单聚焦更清晰 */
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: rgba(0,212,255,0.6);
  box-shadow: 0 0 0 3px rgba(0,212,255,0.12);
}

/* 网格背景更含蓄 + 顶部柔化遮罩 */
.grid-bg {
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(ellipse 80% 62% at 50% 0, #000 28%, transparent 76%);
  mask-image: radial-gradient(ellipse 80% 62% at 50% 0, #000 28%, transparent 76%);
}

/* 截图/媒体容器统一圆角 */
.solution-block-media, .product-carousel-wrap, .hero-carousel-wrap, .carousel-item { border-radius: var(--radius); }

/* reveal 动画更顺滑 */
.reveal {
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.22,1,0.36,1), transform 0.7s cubic-bezier(0.22,1,0.36,1);
}

/* 页脚链接微交互 */
.footer ul a { transition: color var(--transition), padding-left var(--transition); }
.footer ul a:hover { color: var(--accent); padding-left: 3px; }

/* 「向下滚动」提示：因 hero 内含大幅产品截图会浮到画面中间盖住内容，隐藏处理 */
.scroll-hint { display: none; }

/* 首页 hero：文字独占第一整屏，产品截图轮播滚动到下方再出现（仅作用于 #hero，不影响其它页页头）*/
#hero { min-height: 100vh; display: block; padding: 0; }
#hero > .container { display: block; }
#hero .hero-text {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 96px 0 48px;   /* 顶部避开固定导航 */
}
#hero .hero-text .hero-actions { margin-bottom: 0; }
#hero .hero-media {   /* 媒体（轮播/视频）：独占第二整屏，居中展示 */
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 0 72px;
}
#hero .hero-media > .reveal { width: 100%; }

/* 尊重「减少动态」偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}