/* ═══════════════════════════════════════════════════════════════
   OohSleep Landing Page - PC端展示页样式
   延续移动端设计风格，优化PC端体验
   ═══════════════════════════════════════════════════════════════ */

/* CSS Variables - 与移动端保持一致 */
:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #111111;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-card-hover: rgba(255, 255, 255, 0.08);
  --border-color: rgba(255, 255, 255, 0.08);
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --text-muted: rgba(255, 255, 255, 0.5);
  --accent-primary: #c8e972;
  --accent-secondary: #72c8e9;
  --accent-gradient: linear-gradient(135deg, #c8e972 0%, #72c8e9 100%);
  --danger: #ff6b6b;
  --shadow-glow: 0 0 60px rgba(200, 233, 114, 0.15);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

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

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

/* ═══ HEADER ═══ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
}

.logo-icon {
  width: 32px;
  height: 32px;
  color: var(--accent-primary);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 40px;
}

.main-nav a {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.3s ease;
}

.main-nav a:hover {
  color: var(--accent-primary);
}

.header-cta {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--accent-gradient);
  border-radius: 24px;
  font-size: 14px;
  font-weight: 600;
  color: var(--bg-primary);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.header-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(200, 233, 114, 0.3);
}

.header-cta svg {
  width: 16px;
  height: 16px;
}

/* ═══ BUTTONS ═══ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 28px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
}

.btn svg {
  width: 18px;
  height: 18px;
}

.btn-primary {
  background: var(--accent-gradient);
  color: var(--bg-primary);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(200, 233, 114, 0.35);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.15);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border-color);
}

.btn-outline:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.btn-large {
  padding: 18px 36px;
  font-size: 16px;
}

/* ═══ SECTION COMMON ═══ */
section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 60px;
}

.section-tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(200, 233, 114, 0.1);
  border: 1px solid rgba(200, 233, 114, 0.2);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 20px;
}

.section-header h2 {
  font-size: 42px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-header p {
  font-size: 18px;
  color: var(--text-muted);
}

.gradient-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ═══ HERO SECTION ═══ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 72px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-glow {
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(200, 233, 114, 0.08) 0%, transparent 70%);
  animation: float 20s ease-in-out infinite;
}

.hero-stars {
  position: absolute;
  inset: 0;
  background-image: 
    radial-gradient(2px 2px at 20px 30px, rgba(255,255,255,0.3), transparent),
    radial-gradient(2px 2px at 40px 70px, rgba(255,255,255,0.2), transparent),
    radial-gradient(1px 1px at 90px 40px, rgba(255,255,255,0.4), transparent),
    radial-gradient(2px 2px at 130px 80px, rgba(255,255,255,0.2), transparent),
    radial-gradient(1px 1px at 160px 120px, rgba(255,255,255,0.3), transparent);
  background-size: 200px 200px;
  animation: twinkle 4s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(-30px, 30px); }
}

@keyframes twinkle {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

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

.hero-text h1 {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 480px;
}

.hero-ctas {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  gap: 40px;
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 28px;
  font-weight: 700;
  color: var(--accent-primary);
}

.stat-label {
  font-size: 14px;
  color: var(--text-muted);
}

/* Phone Mockup */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.phone-mockup {
  position: relative;
}

.phone-frame {
  width: 280px;
  height: 580px;
  background: linear-gradient(145deg, #1a1a1a 0%, #0d0d0d 100%);
  border-radius: 40px;
  padding: 12px;
  box-shadow: 
    0 50px 100px rgba(0, 0, 0, 0.5),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.phone-screen {
  width: 100%;
  height: 100%;
  background: var(--bg-primary);
  border-radius: 32px;
  overflow: hidden;
}

.app-preview {
  padding: 40px 20px;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
}

.preview-header {
  display: flex;
  justify-content: space-between;
  width: 100%;
  padding: 0 10px;
}

.preview-time {
  font-size: 14px;
  color: var(--text-muted);
}

.preview-status {
  font-size: 12px;
  color: var(--accent-primary);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.preview-timer {
  font-size: 48px;
  font-weight: 200;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}

.preview-waveform {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  height: 60px;
}

.wave {
  width: 4px;
  background: var(--accent-gradient);
  border-radius: 2px;
  animation: wave 1.2s ease-in-out infinite;
}

.wave:nth-child(1) { height: 20px; animation-delay: 0s; }
.wave:nth-child(2) { height: 35px; animation-delay: 0.1s; }
.wave:nth-child(3) { height: 50px; animation-delay: 0.2s; }
.wave:nth-child(4) { height: 35px; animation-delay: 0.3s; }
.wave:nth-child(5) { height: 20px; animation-delay: 0.4s; }

@keyframes wave {
  0%, 100% { transform: scaleY(1); }
  50% { transform: scaleY(0.5); }
}

.preview-info {
  font-size: 14px;
  color: var(--text-muted);
}

.phone-glow {
  position: absolute;
  inset: -50px;
  background: radial-gradient(circle at center, rgba(200, 233, 114, 0.15) 0%, transparent 60%);
  pointer-events: none;
  z-index: -1;
}

/* ═══ FEATURES SECTION ═══ */
.features {
  background: var(--bg-secondary);
}

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 32px;
  transition: all 0.3s ease;
}

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

.feature-icon {
  width: 56px;
  height: 56px;
  background: rgba(200, 233, 114, 0.1);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-icon svg {
  width: 28px;
  height: 28px;
  color: var(--accent-primary);
}

.feature-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ═══ HOW IT WORKS ═══ */
.steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
  max-width: 1000px;
  margin: 0 auto;
}

.step {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 0 20px;
}

.step-number {
  width: 56px;
  height: 56px;
  background: var(--accent-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: 700;
  color: var(--bg-primary);
  margin-bottom: 20px;
}

.step-content h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
}

.step-content p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

.step-connector {
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  margin-top: 27px;
  flex-shrink: 0;
}

/* ═══ PRICING ═══ */
.pricing {
  background: var(--bg-secondary);
}

.pricing-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 800px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 40px;
  position: relative;
  transition: all 0.3s ease;
}

.pricing-card:hover {
  transform: translateY(-4px);
}

.pricing-card.featured {
  background: linear-gradient(145deg, rgba(200, 233, 114, 0.08) 0%, rgba(114, 200, 233, 0.04) 100%);
  border-color: rgba(200, 233, 114, 0.3);
  transform: scale(1.02);
}

.pricing-card.featured:hover {
  transform: scale(1.02) translateY(-4px);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-gradient);
  color: var(--bg-primary);
  font-size: 12px;
  font-weight: 700;
  padding: 6px 16px;
  border-radius: 20px;
  text-transform: uppercase;
}

.pricing-header {
  text-align: center;
  margin-bottom: 32px;
}

.pricing-header h3 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 16px;
}

.pricing-price {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
}

.pricing-price .price {
  font-size: 48px;
  font-weight: 700;
}

.pricing-price .period {
  font-size: 16px;
  color: var(--text-muted);
}

.pricing-features {
  list-style: none;
  margin-bottom: 32px;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  font-size: 15px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
}

.pricing-features li:last-child {
  border-bottom: none;
}

.pricing-features svg {
  width: 20px;
  height: 20px;
  color: var(--accent-primary);
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  flex-shrink: 0;
}

.pricing-card .btn {
  width: 100%;
}

.pricing-note {
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
  margin-top: 16px;
}

/* ═══ BLOG PREVIEW ═══ */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.blog-grid-2 {
  grid-template-columns: repeat(2, 1fr);
  max-width: 900px;
  margin: 0 auto;
}

.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  overflow: hidden;
  transition: all 0.3s ease;
}

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

.blog-image {
  height: 180px;
  background: linear-gradient(135deg, rgba(200, 233, 114, 0.1) 0%, rgba(114, 200, 233, 0.1) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

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

.blog-content {
  padding: 24px;
}

.blog-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent-primary);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.blog-content h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
  line-height: 1.4;
}

.blog-content p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.blog-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-primary);
  transition: color 0.3s ease;
}

.blog-link:hover {
  color: var(--accent-secondary);
}

.blog-cta {
  text-align: center;
  margin-top: 40px;
}

/* ═══ CTA BANNER ═══ */
.cta-banner {
  background: linear-gradient(135deg, rgba(200, 233, 114, 0.1) 0%, rgba(114, 200, 233, 0.05) 100%);
  border-top: 1px solid rgba(200, 233, 114, 0.2);
  border-bottom: 1px solid rgba(200, 233, 114, 0.2);
}

.cta-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  text-align: left;
}

.cta-icon {
  width: 80px;
  height: 80px;
  background: var(--accent-gradient);
  border-radius: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.cta-icon svg {
  width: 40px;
  height: 40px;
  color: var(--bg-primary);
}

.cta-text h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 8px;
}

.cta-text p {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 400px;
}

/* ═══ FOOTER ═══ */
.site-footer {
  background: var(--bg-secondary);
  padding: 60px 0 30px;
  border-top: 1px solid var(--border-color);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand .logo {
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 280px;
}

.footer-links h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-links a {
  display: block;
  font-size: 14px;
  color: var(--text-muted);
  padding: 8px 0;
  transition: color 0.3s ease;
}

.footer-links a:hover {
  color: var(--accent-primary);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 30px;
  border-top: 1px solid var(--border-color);
}

.footer-bottom p {
  font-size: 14px;
  color: var(--text-muted);
}

.footer-social {
  display: flex;
  gap: 16px;
}

.footer-social a {
  width: 40px;
  height: 40px;
  background: var(--bg-card);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.footer-social a:hover {
  background: var(--accent-primary);
}

.footer-social svg {
  width: 18px;
  height: 18px;
  color: var(--text-muted);
}

.footer-social a:hover svg {
  color: var(--bg-primary);
}

/* ═══ RESPONSIVE ═══ */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-subtitle {
    max-width: 100%;
  }
  
  .hero-ctas {
    justify-content: center;
  }
  
  .hero-stats {
    justify-content: center;
  }
  
  .hero-visual {
    display: none;
  }
  
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .steps {
    flex-direction: column;
    gap: 30px;
  }
  
  .step-connector {
    width: 2px;
    height: 30px;
    margin: 0;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .main-nav {
    display: none;
  }
  
  .section-header h2 {
    font-size: 32px;
  }
  
  .hero-text h1 {
    font-size: 36px;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .pricing-cards {
    grid-template-columns: 1fr;
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .blog-grid {
    grid-template-columns: 1fr;
  }
  
  .cta-content {
    flex-direction: column;
    text-align: center;
  }
  
  .cta-text p {
    max-width: 100%;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 20px;
  }
}

/* Entrance Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-text, .hero-visual, .feature-card, .step, .pricing-card, .blog-card {
  animation: fadeInUp 0.6s ease-out forwards;
}

.feature-card:nth-child(2) { animation-delay: 0.1s; }
.feature-card:nth-child(3) { animation-delay: 0.2s; }
.feature-card:nth-child(4) { animation-delay: 0.3s; }
.feature-card:nth-child(5) { animation-delay: 0.4s; }
.feature-card:nth-child(6) { animation-delay: 0.5s; }

.step:nth-child(2) { animation-delay: 0.1s; }
.step:nth-child(4) { animation-delay: 0.2s; }
.step:nth-child(6) { animation-delay: 0.3s; }
.step:nth-child(8) { animation-delay: 0.4s; }