/* ============ AVBOBO 共用样式 ============ */
:root {
  --primary: #00d4ff;
  --primary-dark: #0099cc;
  --secondary: #a855f7;
  --accent: #22c55e;
  --bg-dark: #1a1a2e;
  --bg-darker: #0f0f1a;
  --bg-card: #23233a;
  --bg-card-hover: #2a2a45;
  --text-light: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dark: #1f2937;
  --white: #ffffff;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.15);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Inter", "Noto Sans SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg-dark);
  color: var(--text-light);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }

ul { list-style: none; }

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

/* ============ 顶部导航 ============ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 18px 0;
  background: rgba(15, 15, 26, 0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: all var(--transition);
}

.header.scrolled {
  padding: 12px 0;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.5px;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  color: var(--white);
  box-shadow: 0 4px 14px rgba(0, 212, 255, 0.3);
}

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

.nav-links a {
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  color: var(--text-light);
  font-size: 15px;
  font-weight: 500;
  transition: all var(--transition);
}

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

.nav-links a.active {
  background: linear-gradient(135deg, rgba(0,212,255,0.15), rgba(168,85,247,0.15));
  color: var(--primary);
}

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

.btn-download {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: var(--white) !important;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 14px;
  box-shadow: 0 4px 14px rgba(0, 212, 255, 0.35);
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn-download:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(0, 212, 255, 0.5);
  color: var(--white) !important;
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-light);
  border-radius: 2px;
  transition: all var(--transition);
}

.mobile-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.mobile-toggle.active span:nth-child(2) { opacity: 0; }
.mobile-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.mobile-menu {
  position: fixed;
  top: 60px;
  left: 0;
  right: 0;
  background: rgba(15, 15, 26, 0.98);
  backdrop-filter: blur(20px);
  padding: 24px;
  transform: translateY(-20px);
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

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

.mobile-menu a {
  display: block;
  padding: 14px 8px;
  color: var(--text-light);
  font-size: 16px;
  font-weight: 500;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}

/* ============ Hero ============ */
.hero {
  padding: 160px 0 100px;
  background: radial-gradient(ellipse at top, rgba(0,212,255,0.08), transparent 50%),
              radial-gradient(ellipse at bottom right, rgba(168,85,247,0.08), transparent 50%),
              var(--bg-darker);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60' viewBox='0 0 60 60'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -1px;
  animation: fadeUp 0.8s ease-out;
}

.hero-title span {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub {
  font-size: 18px;
  color: var(--text-muted);
  margin-bottom: 36px;
  line-height: 1.8;
  max-width: 560px;
  animation: fadeUp 0.8s ease-out 0.1s both;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeUp 0.8s ease-out 0.2s both;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 30px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: var(--white) !important;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 15px;
  box-shadow: 0 6px 18px rgba(0, 212, 255, 0.4);
  transition: all var(--transition);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(0, 212, 255, 0.55);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 30px;
  background: transparent;
  color: var(--text-light) !important;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 15px;
  transition: all var(--transition);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--primary);
  color: var(--primary) !important;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.25);
  padding: 8px 16px;
  border-radius: 50px;
  font-size: 13px;
  color: var(--primary);
  margin-bottom: 20px;
  animation: fadeUp 0.8s ease-out 0.05s both;
}

.hero-badge::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
}

.hero-visual {
  position: relative;
  animation: floaty 6s ease-in-out infinite;
}

.hero-mockup {
  width: 100%;
  aspect-ratio: 16/10;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5), 0 0 40px rgba(0,212,255,0.15);
  border: 1px solid rgba(255,255,255,0.08);
}

.hero-mockup img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-float-badge {
  position: absolute;
  background: rgba(35, 35, 58, 0.95);
  backdrop-filter: blur(12px);
  padding: 12px 18px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  box-shadow: var(--shadow-card);
  animation: floaty 6s ease-in-out infinite reverse;
}

.hero-float-badge.f1 { top: -20px; left: -40px; }
.hero-float-badge.f2 { bottom: -20px; right: -20px; }
.hero-float-badge i { color: var(--primary); font-size: 18px; }

@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============ Section 通用 ============ */
.section {
  padding: 90px 0;
  position: relative;
}

.section-alt {
  background: var(--bg-darker);
}

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

.section-subtitle {
  display: inline-block;
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.section-title {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 18px;
  letter-spacing: -0.5px;
}

.section-desc {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto;
}

/* ============ 核心功能 ============ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), var(--secondary), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-glow);
}

.feature-card:hover::before { opacity: 1; }

.feature-icon {
  width: 54px;
  height: 54px;
  background: linear-gradient(135deg, rgba(0,212,255,0.2), rgba(168,85,247,0.2));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  color: var(--primary);
  font-size: 24px;
}

.feature-card h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--white);
}

.feature-card p {
  color: var(--text-muted);
  font-size: 14.5px;
  line-height: 1.75;
}

/* ============ 数据统计 ============ */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-block {
  text-align: center;
  padding: 40px 20px;
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
}

.stat-num {
  font-size: 52px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 8px;
  font-family: "Inter", sans-serif;
}

.stat-unit {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: -4px;
  display: block;
}

.stat-label {
  font-size: 15px;
  color: var(--text-light);
  font-weight: 600;
  margin-top: 10px;
}

/* ============ CTA ============ */
.cta-section {
  background: linear-gradient(135deg, var(--bg-card), var(--bg-darker));
  border-radius: var(--radius-xl);
  padding: 60px;
  border: 1px solid rgba(0,212,255,0.15);
  box-shadow: 0 0 80px rgba(0,212,255,0.1);
}

.cta-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.cta-title {
  font-size: 38px;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.cta-subtitle {
  color: var(--text-muted);
  margin-bottom: 32px;
  line-height: 1.8;
  font-size: 16px;
}

.cta-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}

.cta-badge {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  padding: 8px 14px;
  border-radius: 50px;
  font-size: 13px;
  color: var(--text-muted);
}

.cta-badge strong { color: var(--primary); }

.cta-right {
  position: relative;
}

.cta-steps {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.cta-step {
  display: flex;
  gap: 16px;
  padding: 18px;
  background: var(--bg-dark);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255,255,255,0.04);
}

.cta-step-num {
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
}

.cta-step h4 {
  font-size: 16px;
  margin-bottom: 4px;
}

.cta-step p {
  color: var(--text-muted);
  font-size: 13.5px;
}

/* ============ 评价 ============ */
.testimonial-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  border: 1px solid rgba(255,255,255,0.06);
}

.stars {
  color: #fbbf24;
  font-size: 14px;
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.testimonial-text {
  color: var(--text-light);
  font-size: 15px;
  line-height: 1.85;
  margin-bottom: 22px;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-weight: 700;
  font-size: 17px;
}

.testimonial-name {
  font-weight: 600;
  font-size: 15px;
  color: var(--white);
}

.testimonial-title {
  font-size: 12px;
  color: var(--text-muted);
}

/* ============ Footer ============ */
.footer {
  background: var(--bg-darker);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 70px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 50px;
}

.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p { color: var(--text-muted); font-size: 14.5px; line-height: 1.8; margin-bottom: 24px; max-width: 340px; }

.footer-col h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 20px;
}

.footer-col ul li a {
  display: block;
  padding: 7px 0;
  color: var(--text-muted);
  font-size: 14px;
  transition: all var(--transition);
}

.footer-col ul li a:hover {
  color: var(--primary);
  padding-left: 4px;
}

.social-links { display: flex; gap: 10px; }
.social-link {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: all var(--transition);
}

.social-link:hover {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: var(--white);
  transform: translateY(-2px);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.06);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 12px;
}

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

/* ============ 通用组件 ============ */
.page-banner {
  padding: 160px 0 70px;
  background: radial-gradient(ellipse at center, rgba(0,212,255,0.08), transparent 60%), var(--bg-darker);
  text-align: center;
}

.page-banner h1 {
  font-size: 52px;
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: -1px;
  line-height: 1.15;
}

.page-banner p {
  color: var(--text-muted);
  font-size: 17px;
  max-width: 600px;
  margin: 0 auto;
}

.page-banner .breadcrumbs {
  display: inline-flex;
  gap: 10px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.page-banner .breadcrumbs span:last-child { color: var(--primary); }

/* ============ 关于我们 ============ */
.story-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.story-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(255,255,255,0.06);
  aspect-ratio: 4/3;
}

.story-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.story-content h2 {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.story-content p {
  color: var(--text-muted);
  font-size: 15.5px;
  line-height: 1.85;
  margin-bottom: 16px;
}

.timeline {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 24px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--primary), var(--secondary));
}

.timeline-item {
  display: flex;
  gap: 28px;
  position: relative;
  margin-bottom: 40px;
  padding-left: 10px;
}

.timeline-dot {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: var(--bg-card);
  border: 3px solid var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 14px;
  color: var(--primary);
  position: relative;
  z-index: 1;
  box-shadow: 0 0 20px rgba(0,212,255,0.2);
}

.timeline-content h4 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.timeline-content p {
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.8;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.team-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.06);
  transition: all var(--transition);
}

.team-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
}

.team-photo {
  aspect-ratio: 1/1;
  overflow: hidden;
}

.team-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.team-info {
  padding: 22px 20px;
  text-align: center;
}

.team-info h4 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 4px;
}

.team-info p {
  color: var(--primary);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 1px;
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.value-card {
  text-align: center;
  padding: 48px 32px;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255,255,255,0.06);
}

.value-card .feature-icon {
  margin: 0 auto 22px;
}

.value-card h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.value-card p {
  color: var(--text-muted);
  font-size: 14.5px;
  line-height: 1.8;
}

.partner-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 20px;
}

.partner-item {
  aspect-ratio: 2/1;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--text-muted);
  font-size: 14px;
  letter-spacing: 2px;
  border: 1px solid rgba(255,255,255,0.06);
}

/* ============ 产品中心 ============ */
.product-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.product-hero-text h2 {
  font-size: 42px;
  font-weight: 800;
  margin-bottom: 18px;
  letter-spacing: -0.5px;
  line-height: 1.2;
}

.product-hero-text p {
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1.9;
  margin-bottom: 16px;
}

.product-hero-img {
  aspect-ratio: 16/10;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(255,255,255,0.06);
}

.product-hero-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.features-detail {
  display: flex;
  flex-direction: column;
  gap: 80px;
}

.feature-detail-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.feature-detail-block.reverse {
  direction: rtl;
}

.feature-detail-block.reverse > * {
  direction: ltr;
}

.feature-detail-img {
  aspect-ratio: 4/3;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(255,255,255,0.06);
}

.feature-detail-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.feature-detail-content h3 {
  font-size: 30px;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.3px;
}

.feature-detail-content p {
  color: var(--text-muted);
  font-size: 15.5px;
  line-height: 1.85;
  margin-bottom: 14px;
}

.feature-detail-content ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
}

.feature-detail-content ul li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 14.5px;
  color: var(--text-light);
}

.feature-detail-content ul li i {
  color: var(--accent);
  font-size: 16px;
  margin-top: 2px;
  flex-shrink: 0;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.category-card {
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
  aspect-ratio: 16/10;
  cursor: pointer;
  transition: all var(--transition);
  border: 1px solid rgba(255,255,255,0.06);
}

.category-card:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 12px 40px rgba(0,212,255,0.2);
}

.category-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.category-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(0,0,0,0.85));
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.category-overlay h3 {
  font-size: 22px;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 4px;
}

.category-overlay p {
  font-size: 13px;
  color: rgba(255,255,255,0.8);
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.06);
}

.spec-table th, .spec-table td {
  padding: 16px 22px;
  text-align: left;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  font-size: 14.5px;
}

.spec-table th {
  background: rgba(0,212,255,0.08);
  color: var(--primary);
  font-weight: 600;
  width: 180px;
}

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

.tutorial-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.tutorial-step {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.06);
  position: relative;
}

.tutorial-step::before {
  content: attr(data-step);
  position: absolute;
  top: -16px;
  left: 28px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: var(--white);
  font-weight: 800;
  font-size: 14px;
  padding: 6px 14px;
  border-radius: 50px;
  letter-spacing: 2px;
}

.tutorial-step .feature-icon {
  margin: 0 auto 22px;
}

.tutorial-step h4 {
  font-size: 19px;
  margin-bottom: 10px;
}

.tutorial-step p {
  color: var(--text-muted);
  font-size: 14.5px;
  line-height: 1.8;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-q {
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
  font-size: 15.5px;
  color: var(--white);
  user-select: none;
}

.faq-q i {
  transition: transform var(--transition);
  color: var(--primary);
}

.faq-item.open .faq-q i { transform: rotate(45deg); }

.faq-a {
  padding: 0 24px 0;
  max-height: 0;
  overflow: hidden;
  transition: all var(--transition);
}

.faq-item.open .faq-a {
  padding: 0 24px 22px;
  max-height: 400px;
}

.faq-a p {
  color: var(--text-muted);
  font-size: 14.5px;
  line-height: 1.85;
}

/* ============ 新闻资讯 ============ */
.news-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.news-card {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 28px;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.06);
  transition: all var(--transition);
}

.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.news-card:hover .news-img img {
  transform: scale(1.05);
}

.news-img {
  aspect-ratio: 4/3;
  overflow: hidden;
}

.news-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.news-body {
  padding: 24px 8px 24px 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.news-meta {
  display: flex;
  gap: 14px;
  margin-bottom: 10px;
  font-size: 13px;
  color: var(--text-muted);
}

.news-category {
  background: rgba(0,212,255,0.1);
  color: var(--primary);
  padding: 3px 10px;
  border-radius: 4px;
  font-weight: 600;
}

.news-body h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.4;
}

.news-body p {
  color: var(--text-muted);
  font-size: 14.5px;
  line-height: 1.85;
  margin-bottom: 14px;
}

.news-read {
  color: var(--primary);
  font-weight: 600;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.news-read:hover { gap: 10px; }

.changelog-list {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255,255,255,0.06);
  overflow: hidden;
}

.changelog-item {
  display: flex;
  gap: 20px;
  padding: 22px 28px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.changelog-item:last-child { border-bottom: none; }

.changelog-date {
  flex-shrink: 0;
  min-width: 100px;
  font-weight: 600;
  color: var(--primary);
  font-size: 14px;
  padding-top: 2px;
}

.changelog-tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 600;
  margin-right: 8px;
  margin-bottom: 4px;
}

.tag-new { background: rgba(34,197,94,0.15); color: var(--accent); }
.tag-fix { background: rgba(239,68,68,0.15); color: #ef4444; }
.tag-improve { background: rgba(251,191,36,0.15); color: #fbbf24; }
.tag-feature { background: rgba(0,212,255,0.15); color: var(--primary); }

.changelog-body ul {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.changelog-body li {
  color: var(--text-light);
  font-size: 14.5px;
  line-height: 1.7;
  padding-left: 12px;
  position: relative;
}

.changelog-body li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--secondary);
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.case-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.06);
}

.case-img {
  aspect-ratio: 16/10;
  overflow: hidden;
}

.case-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.case-body {
  padding: 24px 22px;
}

.case-body h4 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.case-body p {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 12px;
}

.case-tag {
  font-size: 12px;
  color: var(--primary);
  font-weight: 600;
  letter-spacing: 1px;
}

/* ============ 联系我们 ============ */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: stretch;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-info .story-image {
  aspect-ratio: 16/10;
}

.contact-info h2 {
  font-size: 34px;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}

.contact-info .p {
  color: var(--text-muted);
  font-size: 15.5px;
  line-height: 1.9;
}

.contact-detail-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 12px;
}

.contact-detail-item {
  display: flex;
  gap: 14px;
  padding: 16px 18px;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255,255,255,0.06);
}

.contact-detail-item i {
  color: var(--primary);
  font-size: 22px;
  flex-shrink: 0;
  margin-top: 2px;
}

.contact-detail-item h5 {
  font-size: 15px;
  margin-bottom: 2px;
}

.contact-detail-item p,
.contact-detail-item a {
  color: var(--text-muted);
  font-size: 14px;
}

.contact-form {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 40px;
  border: 1px solid rgba(255,255,255,0.06);
  box-shadow: var(--shadow-card);
}

.contact-form h3 {
  font-size: 26px;
  font-weight: 800;
  margin-bottom: 24px;
}

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

.form-group { margin-bottom: 16px; }

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-muted);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  background: var(--bg-darker);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: var(--white);
  font-size: 14px;
  font-family: inherit;
  transition: all var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0,212,255,0.15);
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

.form-submit {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border: none;
  border-radius: var(--radius-sm);
  color: var(--white);
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: all var(--transition);
}

.form-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(0,212,255,0.5);
}

.form-message {
  margin-top: 14px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  display: none;
}

.form-message.success {
  display: block;
  background: rgba(34,197,94,0.15);
  color: var(--accent);
  border: 1px solid rgba(34,197,94,0.3);
}

.form-message.error {
  display: block;
  background: rgba(239,68,68,0.15);
  color: #ef4444;
  border: 1px solid rgba(239,68,68,0.3);
}

.support-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.support-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.06);
  transition: all var(--transition);
}

.support-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.support-card .feature-icon {
  margin: 0 auto 20px;
}

.support-card h4 {
  font-size: 17px;
  margin-bottom: 8px;
}

.support-card p {
  font-size: 13.5px;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.support-card a {
  font-size: 13.5px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* ============ 404 ============ */
.error-page {
  padding: 200px 0 120px;
  text-align: center;
}

.error-code {
  font-size: 140px;
  font-weight: 900;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 16px;
  letter-spacing: -4px;
}

.error-page h2 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 12px;
}

.error-page p {
  color: var(--text-muted);
  font-size: 16px;
  margin-bottom: 32px;
}

/* ============ 响应式 ============ */
@media (max-width: 1199px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-title { font-size: 42px; }
  .hero-visual { max-width: 560px; margin: 0 auto; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .cta-inner { grid-template-columns: 1fr; }
  .cta-section { padding: 40px; }
  .testimonial-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .story-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .value-grid { grid-template-columns: 1fr; }
  .partner-grid { grid-template-columns: repeat(3, 1fr); }
  .product-hero { grid-template-columns: 1fr; }
  .feature-detail-block { grid-template-columns: 1fr; }
  .feature-detail-block.reverse { direction: ltr; }
  .category-grid { grid-template-columns: repeat(2, 1fr); }
  .tutorial-steps { grid-template-columns: 1fr; }
  .news-card { grid-template-columns: 1fr; }
  .news-img { aspect-ratio: 16/9; }
  .contact-layout { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .support-grid { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: 1fr; }
  .section-title { font-size: 32px; }
}

@media (max-width: 767px) {
  .nav-links { display: none; }
  .nav-right .btn-download { display: none; }
  .mobile-toggle { display: flex; }
  .hero { padding: 130px 0 60px; }
  .hero-title { font-size: 34px; }
  .hero-sub { font-size: 15px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions a { justify-content: center; width: 100%; }
  .features-grid { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: 1fr; gap: 16px; }
  .stat-num { font-size: 42px; }
  .section { padding: 60px 0; }
  .section-title { font-size: 28px; }
  .section-header { margin-bottom: 40px; }
  .cta-section { padding: 30px 24px; }
  .cta-title { font-size: 28px; }
  .page-banner { padding: 140px 0 40px; }
  .page-banner h1 { font-size: 36px; }
  .team-grid { grid-template-columns: 1fr 1fr; gap: 14px; }
  .team-photo aspect-ratio { aspect-ratio: 1/1; }
  .partner-grid { grid-template-columns: repeat(2, 1fr); }
  .category-grid { grid-template-columns: 1fr; }
  .contact-form { padding: 28px 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .hero-float-badge.f1 { display: none; }
  .hero-float-badge.f2 { bottom: -12px; right: -8px; font-size: 12px; padding: 8px 12px; }
  .container { padding: 0 16px; }
  .feature-detail-block { gap: 30px; }
  .feature-detail-content h3 { font-size: 24px; }
  .timeline::before { left: 20px; }
}

@media (max-width: 480px) {
  .team-grid { grid-template-columns: 1fr 1fr; }
  .stat-block { padding: 28px 14px; }
  .partner-grid { grid-template-columns: repeat(2, 1fr); }
}