/* ============================================
   水印科技 官网样式表
   风格：简约大气，科技感
   ============================================ */

/* ---- CSS Variables ---- */
:root {
  --primary: #0056D2;
  --primary-light: #3B82F6;
  --primary-dark: #003D9E;
  --accent: #00C6FB;
  --text-primary: #1A1A2E;
  --text-secondary: #4A5568;
  --text-muted: #718096;
  --bg-light: #FAFBFE;
  --bg-gray: #F5F7FA;
  --bg-dark: #0D1B3E;
  --border: #E2E8F0;
  --white: #FFFFFF;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 8px 32px rgba(0,0,0,0.1);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.15);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
  --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
}

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-sans);
  color: var(--text-primary);
  line-height: 1.7;
  background: var(--white);
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; transition: color var(--transition); }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ---- Container ---- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================
   HEADER
   ============================================ */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: all var(--transition);
}
.header.scrolled {
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-icon svg { display: block; }
.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.02em;
}

/* Nav */
.nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding-bottom: 2px;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--primary);
  transition: width var(--transition);
  border-radius: 2px;
}
.nav-link:hover, .nav-link.active { color: var(--primary); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }

/* Mobile toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
}
.nav-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all var(--transition);
  cursor: pointer;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: var(--white);
  box-shadow: 0 4px 15px rgba(0,86,210,0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0,86,210,0.4);
  color: var(--white);
}
.btn-outline {
  border: 2px solid rgba(255,255,255,0.6);
  color: var(--white);
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(10px);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.2);
  border-color: var(--white);
  transform: translateY(-2px);
}
.btn-white {
  background: var(--white);
  color: var(--primary);
  box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}
.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.25);
}
.btn-full { width: 100%; justify-content: center; }

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #0D1B3E 0%, #0056D2 50%, #003D9E 100%);
  padding-top: 72px;
}
.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}
.hero-bg::before {
  content: '';
  position: absolute;
  top: -50%; right: -20%;
  width: 800px; height: 800px;
  background: radial-gradient(circle, rgba(0,198,251,0.15) 0%, transparent 70%);
  animation: pulse 8s ease-in-out infinite;
}
.hero-bg::after {
  content: '';
  position: absolute;
  bottom: -30%; left: -10%;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(59,130,246,0.12) 0%, transparent 70%);
  animation: pulse 10s ease-in-out infinite reverse;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.1); opacity: 1; }
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 80px 24px 120px;
  max-width: 700px;
}
.hero-badge {
  display: inline-block;
  padding: 6px 18px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 50px;
  color: rgba(255,255,255,0.9);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  margin-bottom: 1.5rem;
  backdrop-filter: blur(10px);
}
.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}
.gradient-text {
  background: linear-gradient(135deg, #00C6FB, #a8edea);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.8);
  max-width: 560px;
  margin-bottom: 2.5rem;
  line-height: 1.8;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 3.5rem;
}
.hero-stats {
  display: flex;
  align-items: center;
  gap: 0;
  flex-wrap: wrap;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-md);
  padding: 20px 0;
  backdrop-filter: blur(10px);
}
.stat-item {
  flex: 1;
  min-width: 120px;
  text-align: center;
  padding: 0 24px;
}
.stat-num {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1;
  margin-bottom: 4px;
}
.stat-num em {
  font-size: 1rem;
  font-style: normal;
  font-weight: 600;
  color: var(--accent);
}
.stat-label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.6);
}
.stat-divider {
  width: 1px;
  height: 40px;
  background: rgba(255,255,255,0.15);
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.5);
  font-size: 0.8rem;
  animation: bounce 2s ease-in-out infinite;
}
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

/* ============================================
   SECTION COMMON
   ============================================ */
.section { padding: 90px 0; }
.section-light { background: var(--bg-light); }
.section-gray { background: var(--bg-gray); }
.section-dark { background: var(--bg-dark); }

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}
.section-tag {
  display: inline-block;
  padding: 4px 16px;
  background: rgba(0,86,210,0.08);
  color: var(--primary);
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}
.section-tag-light {
  background: rgba(255,255,255,0.12);
  color: rgba(255,255,255,0.9);
}
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  line-height: 1.3;
  margin-bottom: 1rem;
}
.section-desc {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto;
}

/* ============================================
   FEATURES GRID
   ============================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.feature-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(0,86,210,0.2);
}
.feature-icon {
  width: 56px; height: 56px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.2rem;
  font-size: 1.4rem;
  color: var(--white);
}
.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
  color: var(--text-primary);
}
.feature-card p { color: var(--text-muted); font-size: 0.9rem; line-height: 1.7; }

/* ============================================
   PRODUCTS MATRIX
   ============================================ */
.products-matrix {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
}
.matrix-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  padding: 1.8rem 1.5rem;
  text-align: center;
  transition: all var(--transition);
  color: rgba(255,255,255,0.85);
}
.matrix-card:hover {
  background: rgba(255,255,255,0.12);
  border-color: rgba(0,198,251,0.4);
  transform: translateY(-3px);
}
.matrix-card-primary {
  background: linear-gradient(135deg, rgba(0,86,210,0.5), rgba(0,198,251,0.3));
  border-color: rgba(0,198,251,0.5);
}
.matrix-card i { font-size: 2rem; margin-bottom: 0.8rem; color: var(--accent); display: block; }
.matrix-card h4 { font-size: 1rem; font-weight: 700; margin-bottom: 0.4rem; }
.matrix-card p { font-size: 0.82rem; color: rgba(255,255,255,0.6); }

/* ============================================
   CLIENTS GRID
   ============================================ */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
}
.client-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 2rem 1.5rem;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  text-align: center;
}
.client-item:hover {
  border-color: var(--primary);
  box-shadow: 0 8px 24px rgba(0,86,210,0.12);
  transform: translateY(-3px);
}
.client-item i { font-size: 2rem; color: var(--primary); opacity: 0.7; }
.client-item span { font-size: 0.9rem; font-weight: 600; color: var(--text-secondary); }

/* ============================================
   TIMELINE (index)
   ============================================ */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 100px;
  top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary), var(--accent));
}
.timeline-item {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
  margin-bottom: 2rem;
  position: relative;
}
.timeline-year {
  width: 80px;
  flex-shrink: 0;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--primary);
  text-align: right;
  padding-top: 4px;
}
.timeline-content {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.2rem 1.5rem;
  flex: 1;
  box-shadow: var(--shadow-sm);
  position: relative;
  margin-left: 1.5rem;
}
.timeline-content::before {
  content: '';
  position: absolute;
  left: -24px;
  top: 14px;
  width: 12px; height: 12px;
  background: var(--accent);
  border-radius: 50%;
  border: 2px solid var(--white);
  box-shadow: 0 0 0 3px rgba(0,198,251,0.3);
}
.timeline-content h4 { font-weight: 700; margin-bottom: 4px; }
.timeline-content p { color: var(--text-muted); font-size: 0.9rem; }

/* ============================================
   CTA SECTION
   ============================================ */
.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  text-align: center;
  padding: 80px 24px;
}
.cta-section h2 { font-size: 2rem; font-weight: 800; color: var(--white); margin-bottom: 0.8rem; }
.cta-section p { color: rgba(255,255,255,0.8); font-size: 1.1rem; margin-bottom: 2rem; }

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: #0A1628;
  color: rgba(255,255,255,0.7);
}
.footer-inner {
  display: flex;
  gap: 4rem;
  padding: 60px 24px 40px;
  flex-wrap: wrap;
}
.footer-brand {
  flex: 1.5;
  min-width: 220px;
}
.footer-brand .logo { margin-bottom: 1rem; }
.footer-brand p { font-size: 0.9rem; line-height: 1.8; color: rgba(255,255,255,0.5); }
.footer-links {
  flex: 2;
  display: flex;
  gap: 3rem;
  flex-wrap: wrap;
}
.footer-col { min-width: 130px; }
.footer-col h5 { font-size: 0.9rem; font-weight: 700; color: var(--white); margin-bottom: 1rem; }
.footer-col a {
  display: block;
  font-size: 0.88rem;
  color: rgba(255,255,255,0.5);
  margin-bottom: 0.6rem;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--accent); }
.footer-col a i { margin-right: 6px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 24px;
  text-align: center;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.35);
}

/* ============================================
   PAGE BANNER
   ============================================ */
.page-banner {
  position: relative;
  padding: 120px 24px 60px;
  background: linear-gradient(135deg, #0D1B3E 0%, #0056D2 100%);
  overflow: hidden;
}
.page-banner-bg {
  position: absolute;
  inset: 0;
}
.page-banner-bg::after {
  content: '';
  position: absolute;
  top: -50%; right: -10%;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(0,198,251,0.15) 0%, transparent 70%);
}
.page-banner-content {
  position: relative;
  z-index: 2;
}
.page-banner-content h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--white);
  margin-bottom: 0.5rem;
}
.page-banner-content p {
  color: rgba(255,255,255,0.7);
  font-size: 1rem;
  margin-bottom: 1rem;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
}
.breadcrumb a { color: rgba(255,255,255,0.6); }
.breadcrumb a:hover { color: var(--white); }
.breadcrumb i { font-size: 0.7rem; }
.breadcrumb span { color: rgba(255,255,255,0.9); }

/* ============================================
   ABOUT PAGE
   ============================================ */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.about-intro-text .section-title { text-align: left; margin-bottom: 1.2rem; }
.about-paragraph {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.8;
}
.about-highlights {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}
.highlight-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(0,86,210,0.06);
  border: 1px solid rgba(0,86,210,0.12);
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
}
.highlight-item i { color: var(--primary); }

.about-visual-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
}
.visual-ring {
  width: 200px;
  height: 200px;
  margin: 0 auto 1.5rem;
  animation: spin-slow 20s linear infinite;
}
@keyframes spin-slow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
.visual-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.vs-item {
  text-align: center;
  padding: 12px;
  background: var(--bg-gray);
  border-radius: var(--radius-sm);
}
.vs-item strong { display: block; font-size: 1.4rem; font-weight: 800; color: var(--primary); }
.vs-item span { font-size: 0.8rem; color: var(--text-muted); }

/* Full timeline (about page) */
.timeline-full {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
}
.timeline-full::before {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary), var(--accent));
}
.tl-item {
  display: flex;
  align-items: flex-start;
  margin-bottom: 2.5rem;
  position: relative;
}
.tl-left { flex-direction: row; }
.tl-right { flex-direction: row-reverse; }
.tl-year-badge {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: var(--white);
  font-size: 0.85rem;
  font-weight: 800;
  padding: 6px 14px;
  border-radius: 50px;
  white-space: nowrap;
  z-index: 2;
  top: 8px;
  box-shadow: 0 4px 12px rgba(0,86,210,0.3);
}
.tl-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  width: calc(50% - 60px);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}
.tl-left .tl-card { margin-right: auto; }
.tl-right .tl-card { margin-left: auto; }
.tl-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.tl-card h4 { font-weight: 700; margin-bottom: 0.5rem; color: var(--text-primary); }
.tl-card h4 i { margin-right: 8px; color: var(--primary); }
.tl-card p { font-size: 0.9rem; color: var(--text-muted); }

/* Honor Grid */
.honor-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.honor-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 2rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}
.honor-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(0,86,210,0.2);
}
.honor-icon {
  width: 60px; height: 60px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  font-size: 1.4rem;
  color: var(--white);
}
.honor-card h4 { font-weight: 700; margin-bottom: 0.5rem; }
.honor-card p { font-size: 0.88rem; color: var(--text-muted); }

/* Team Grid */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.team-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  padding: 2rem;
  text-align: center;
  transition: all var(--transition);
  color: rgba(255,255,255,0.85);
}
.team-card:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(0,198,251,0.4);
  transform: translateY(-3px);
}
.team-avatar {
  width: 70px; height: 70px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  font-size: 1.8rem;
  color: var(--white);
}
.team-card h4 { font-weight: 700; margin-bottom: 0.3rem; }
.team-role { font-size: 0.85rem; color: var(--accent); margin-bottom: 0.8rem; }
.team-card p { font-size: 0.88rem; color: rgba(255,255,255,0.6); }

/* Tech Advantage */
.tech-advantage { display: flex; flex-direction: column; gap: 24px; }
.tech-item {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.8rem 2rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}
.tech-item:hover { transform: translateX(4px); border-color: rgba(0,86,210,0.2); box-shadow: var(--shadow-md); }
.tech-icon-wrap {
  flex-shrink: 0;
  width: 52px; height: 52px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: var(--white);
}
.tech-text h4 { font-weight: 700; margin-bottom: 0.4rem; }
.tech-text p { color: var(--text-muted); font-size: 0.9rem; }

/* ============================================
   PRODUCTS PAGE
   ============================================ */
.prod-tabs {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
  justify-content: center;
}
.prod-tab {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-gray);
  border: 2px solid transparent;
  transition: all var(--transition);
}
.prod-tab:hover { color: var(--primary); background: rgba(0,86,210,0.06); }
.prod-tab.active {
  color: var(--white);
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  box-shadow: 0 4px 15px rgba(0,86,210,0.3);
}

.prod-panel { display: none; }
.prod-panel.active { display: block; }
.prod-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}
.prod-detail-text h3 {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 1rem;
  color: var(--text-primary);
}
.prod-detail-text h3 i { color: var(--primary); margin-right: 10px; }
.prod-lead {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.8;
}
.prod-features {
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.prod-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.prod-features li i { color: #10B981; font-size: 1rem; flex-shrink: 0; }
.prod-cases h4 { font-size: 0.9rem; font-weight: 700; color: var(--text-primary); margin-bottom: 8px; }
.case-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.case-tag {
  padding: 4px 12px;
  background: rgba(0,86,210,0.08);
  color: var(--primary);
  border-radius: 4px;
  font-size: 0.82rem;
  font-weight: 600;
}

.prod-visual-box {
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  text-align: center;
  color: var(--white);
}
.prod-visual-box i { font-size: 4rem; display: block; margin-bottom: 1rem; opacity: 0.9; }
.prod-visual-box h4 { font-size: 1.5rem; font-weight: 800; margin-bottom: 1.5rem; }
.prod-visual-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}
.prod-visual-tags span {
  padding: 4px 12px;
  background: rgba(255,255,255,0.15);
  border-radius: 4px;
  font-size: 0.82rem;
}

/* Process Steps */
.process-steps {
  display: flex;
  align-items: flex-start;
  gap: 0;
  flex-wrap: wrap;
  justify-content: center;
}
.process-step {
  flex: 1;
  min-width: 150px;
  max-width: 200px;
  text-align: center;
  padding: 1.5rem 1rem;
  position: relative;
}
.process-num {
  font-size: 2.5rem;
  font-weight: 900;
  color: rgba(0,86,210,0.08);
  line-height: 1;
  margin-bottom: 0.5rem;
}
.process-icon {
  width: 52px; height: 52px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  font-size: 1.2rem;
  color: var(--white);
}
.process-step h4 { font-weight: 700; margin-bottom: 0.5rem; }
.process-step p { font-size: 0.85rem; color: var(--text-muted); }
.process-arrow {
  align-self: center;
  color: var(--primary);
  opacity: 0.3;
  font-size: 1.2rem;
  margin-top: -24px;
}

/* ============================================
   CONTACT PAGE
   ============================================ */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 4rem;
  align-items: start;
}
.contact-info h3 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
}
.contact-intro {
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 2rem;
}
.contact-items { display: flex; flex-direction: column; gap: 1.2rem; margin-bottom: 2rem; }
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}
.contact-icon {
  width: 44px; height: 44px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--white);
  flex-shrink: 0;
}
.contact-item h5 { font-size: 0.9rem; font-weight: 700; margin-bottom: 2px; }
.contact-item p { font-size: 0.88rem; color: var(--text-muted); }
.contact-social h5 { font-size: 0.9rem; font-weight: 700; margin-bottom: 0.8rem; }
.social-icons { display: flex; gap: 12px; }
.social-icon {
  width: 40px; height: 40px;
  background: var(--bg-gray);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--text-secondary);
  transition: all var(--transition);
}
.social-icon:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--white);
  transform: translateY(-2px);
}

/* 微信公众号二维码 */
.wechat-qr-img {
  width: 160px;
  height: auto;
  cursor: pointer;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  transition: all var(--transition);
  object-fit: contain;
}
.wechat-qr-img:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: scale(1.03);
}

/* 图片预览弹窗 */
.qr-preview-dialog {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  border: none;
  padding: 0;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}
.qr-preview-dialog[open] {
  opacity: 1;
  visibility: visible;
}
.qr-preview-dialog::backdrop {
  background: rgba(0, 0, 0, 0.85);
}
.qr-preview-img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}
.qr-preview-close {
  position: absolute;
  top: 20px;
  right: 30px;
  width: 44px;
  height: 44px;
  background: rgba(255, 255, 255, 0.15);
  border: none;
  border-radius: 50%;
  color: #fff;
  font-size: 1.8rem;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}
.qr-preview-close:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: scale(1.1);
}

.contact-form-wrap {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
}
.contact-form-wrap h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.required { color: #E53E3E; }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-family: var(--font-sans);
  color: var(--text-primary);
  background: var(--bg-light);
  transition: all var(--transition);
  outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  background: var(--white);
  box-shadow: 0 0 0 3px rgba(0,86,210,0.1);
}
.form-group textarea { resize: vertical; }

.form-success {
  text-align: center;
  padding: 3rem 2rem;
}
.form-success i { font-size: 3rem; color: #10B981; display: block; margin-bottom: 1rem; }
.form-success h4 { font-size: 1.3rem; font-weight: 700; margin-bottom: 0.5rem; }
.form-success p { color: var(--text-muted); }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 1.5rem;
  text-align: left;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: all var(--transition);
}
.faq-question:hover { background: rgba(0,86,210,0.03); }
.faq-question i { flex-shrink: 0; color: var(--primary); transition: transform var(--transition); }
.faq-item.open .faq-question i { transform: rotate(45deg); }
.faq-answer {
  padding: 0 1.5rem;
  max-height: 0;
  overflow: hidden;
  transition: all 0.4s ease;
}
.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 1.5rem 1.2rem;
}
.faq-answer p { color: var(--text-muted); font-size: 0.9rem; line-height: 1.8; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .about-intro { grid-template-columns: 1fr; }
  .about-intro-visual { max-width: 400px; margin: 0 auto; }
  .prod-detail { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; }
  .timeline-full::before { left: 30px; }
  .tl-left, .tl-right { flex-direction: row; }
  .tl-year-badge { left: 30px; transform: none; }
  .tl-card { width: calc(100% - 90px); margin-left: auto !important; }
}

@media (max-width: 768px) {
  .nav { display: none; position: fixed; top: 72px; left: 0; right: 0; background: var(--white); flex-direction: column; padding: 1.5rem; gap: 0; border-bottom: 1px solid var(--border); box-shadow: var(--shadow-md); }
  .nav.open { display: flex; }
  .nav-link { padding: 12px 0; font-size: 1rem; border-bottom: 1px solid var(--border); }
  .nav-link:last-child { border-bottom: none; }
  .nav-toggle { display: flex; }
  .hero-stats { justify-content: center; }
  .stat-divider { display: none; }
  .stat-item { min-width: 40%; }
  .timeline::before { display: none; }
  .timeline-item { flex-direction: column; }
  .timeline-year { width: auto; text-align: left; }
  .timeline-content { margin-left: 0; }
  .timeline-content::before { display: none; }
  .form-row { grid-template-columns: 1fr; }
  .process-steps { flex-direction: column; align-items: center; }
  .process-arrow { transform: rotate(90deg); }
  .section { padding: 60px 0; }
  .hero-content { padding: 60px 24px 100px; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
  .prod-tabs { flex-direction: column; align-items: stretch; }
}

/* ============================================
   SCROLL ANIMATIONS
   ============================================ */
.animate-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.animate-in.visible {
  opacity: 1;
  transform: none;
}
.animate-in:nth-child(2) { transition-delay: 0.1s; }
.animate-in:nth-child(3) { transition-delay: 0.2s; }
.animate-in:nth-child(4) { transition-delay: 0.3s; }