/* ============================================
   中创合科技 — 全局样式
   ============================================ */

/* === Reset & Base === */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  overflow-x: hidden;
  transition: background-color var(--transition-base), color var(--transition-base);
}

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p {
  margin-bottom: var(--space-md);
  color: var(--text-secondary);
}

a {
  color: var(--color-primary-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary);
}

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

/* === Container === */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container--wide {
  max-width: var(--max-width-wide);
}

.container--narrow {
  max-width: var(--max-width-narrow);
}

/* === Section === */
.section {
  padding: var(--space-5xl) 0;
  position: relative;
}

.section--dark {
  background-color: var(--bg-secondary);
}

.section__label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 6px var(--space-lg);
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  color: var(--color-primary-light);
  margin-bottom: var(--space-lg);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 500;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.section__label::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--gradient-primary);
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}

.section__title {
  margin-bottom: var(--space-lg);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.section__subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  margin-bottom: var(--space-3xl);
  max-width: 620px;
  line-height: 1.8;
}

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

.text-center .section__subtitle {
  margin-left: auto;
  margin-right: auto;
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 14px 32px;
  font-size: var(--text-base);
  font-weight: 600;
  font-family: var(--font-sans);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  letter-spacing: 0.01em;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.08);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.btn:hover::after {
  opacity: 1;
}

.btn--primary {
  background: var(--gradient-primary);
  color: var(--text-on-primary);
  box-shadow: var(--shadow-glow);
}

.btn--primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl);
  color: var(--text-on-primary);
}

.btn--secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
}

.btn--secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary-light);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.btn--ghost {
  background: transparent;
  color: var(--color-primary-light);
  padding: 8px 16px;
}

.btn--ghost:hover {
  background: rgba(108, 92, 231, 0.1);
  color: var(--color-primary);
}

.btn--lg {
  padding: 18px 44px;
  font-size: var(--text-lg);
  border-radius: var(--radius-lg);
}

.btn--sm {
  padding: 8px 20px;
  font-size: var(--text-sm);
}

/* === Cards === */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: var(--gradient-card-border);
  opacity: 0;
  transition: opacity var(--transition-base);
  z-index: -1;
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--border-color-hover);
  box-shadow: var(--shadow-lg);
  background: var(--bg-card-hover);
}

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

/* === Glass Effect === */
.glass {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
}

/* === Badge / Tag === */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  background: rgba(108, 92, 231, 0.1);
  border: 1px solid rgba(108, 92, 231, 0.2);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  color: var(--color-primary-light);
  font-weight: 500;
}

.badge--accent {
  background: rgba(253, 203, 110, 0.1);
  border-color: rgba(253, 203, 110, 0.2);
  color: var(--color-accent);
}

.badge--secondary {
  background: rgba(0, 210, 255, 0.1);
  border-color: rgba(0, 210, 255, 0.2);
  color: var(--color-secondary);
}

/* === Grid helpers === */
.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }

/* === Divider === */
.divider {
  width: 60px;
  height: 4px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  margin: var(--space-md) 0;
}

.divider--center {
  margin-left: auto;
  margin-right: auto;
}

/* === Scrollbar === */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--color-primary-dark);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary);
}

/* === Selection === */
::selection {
  background: rgba(108, 92, 231, 0.3);
  color: var(--text-on-primary);
}

/* === Utilities === */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

.hidden {
  display: none !important;
}

.no-scroll {
  overflow: hidden;
}

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

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes glow-pulse {
  0%, 100% { box-shadow: 0 0 20px rgba(108, 92, 231, 0.2); }
  50% { box-shadow: 0 0 40px rgba(108, 92, 231, 0.4); }
}

@keyframes spin-slow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* === Fade in animation for AOS fallback === */
[data-aos] {
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].aos-animate {
  opacity: 1 !important;
  transform: none !important;
}

/* === Global Mobile Fixes === */
@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-md);
  }
  h1 { font-size: var(--text-3xl); }
  h2 { font-size: var(--text-2xl); }
  h3 { font-size: var(--text-xl); }
  p { margin-bottom: var(--space-sm); }

  .btn--lg {
    padding: 14px 28px;
    font-size: var(--text-base);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-sm);
  }
}