/* ========================================
   DESIGN TOKEN SYSTEM - Eclipse Glasses
   ======================================== */

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

html {
  scroll-behavior: smooth;
}

:root {
  /* 🌌 Color System - Space Theme */
  --color-bg-primary: #050510;
  --color-bg-secondary: #0a0a1a;
  --color-bg-tertiary: #1a1a3e;
  --color-bg-card: rgba(26, 26, 62, 0.75);
  --color-bg-card-hover: rgba(26, 26, 62, 0.95);
  
  /* 星云渐变 - 优化后的色彩 */
  --color-purple-deep: #4c1d95;
  --color-purple-mid: #6b21a8;
  --color-blue-deep: #1e3a8a;
  --color-blue-mid: #2563eb;
  --color-cyan-light: #06b6d4;
  
  /* 渐变组合 */
  --gradient-primary: linear-gradient(135deg, #6b21a8 0%, #2563eb 50%, #06b6d4 100%);
  --gradient-secondary: linear-gradient(135deg, #4c1d95 0%, #1e3a8a 100%);
  --gradient-hero: radial-gradient(ellipse at top, #1a1a3e 0%, #050510 100%);
  
  /* 文本层级 */
  --text-primary: #ffffff;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-accent: #a855f7;
  
  /* 边框与分割线 */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.15);
  --border-strong: rgba(255, 255, 255, 0.25);
  
  /* 阴影系统 - 分层设计 */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 40px rgba(107, 33, 168, 0.25);
  --shadow-xl: 0 16px 60px rgba(107, 33, 168, 0.35);
  --shadow-glow: 0 0 40px rgba(107, 33, 168, 0.2);
  
  /* 圆角系统 */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  /* 间距系统 - 8px栅格 */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;
  
  /* 字体层级 */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;
  --text-4xl: 2.5rem;
  --text-5xl: 3.5rem;
  
  /* 动画时间 */
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;
}

body {
  font-family: var(--font-family);
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--color-bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   NAVIGATION
   ======================================== */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: all var(--duration-normal) cubic-bezier(0.4, 0, 0.2, 1);
  background: transparent;
}

header.scrolled {
  background: rgba(5, 5, 16, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-sm) var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.logo-icon {
  width: 44px;
  height: 44px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: white;
  box-shadow: var(--shadow-sm);
  transition: transform var(--duration-normal) ease;
}

.logo:hover .logo-icon {
  transform: scale(1.05) rotate(5deg);
}

.logo-text {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
  align-items: center;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: var(--text-sm);
  position: relative;
  padding: var(--spacing-xs) 0;
  transition: color var(--duration-normal) ease;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--duration-normal) ease;
}

.nav-links a:hover {
  color: var(--text-primary);
}

.nav-links a:hover::after {
  width: 100%;
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.lang-switch-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: var(--spacing-xs) var(--spacing-sm);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: all var(--duration-fast) ease;
}

.lang-switch-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.4);
}

.lang-icon {
  font-size: 14px;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--spacing-xs);
  z-index: 1001;
}

.hamburger span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--duration-normal) cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 2px;
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(5, 5, 16, 0.98);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  padding: 100px var(--spacing-lg) var(--spacing-xl);
  z-index: 999;
  animation: slideDown var(--duration-normal) ease;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.mobile-menu.active {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.mobile-menu ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  align-items: center;
  width: 100%;
  max-width: 400px;
}

.mobile-menu a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: var(--text-xl);
  font-weight: 500;
  transition: color var(--duration-normal) ease;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  width: 100%;
  text-align: center;
}

.mobile-menu a:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 100px var(--spacing-lg) var(--spacing-3xl);
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

/* 星空背景 */
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(1.5px 1.5px at 20px 30px, rgba(255,255,255,0.4), transparent),
    radial-gradient(1.5px 1.5px at 40px 70px, rgba(255,255,255,0.25), transparent),
    radial-gradient(1px 1px at 90px 40px, rgba(255,255,255,0.5), transparent),
    radial-gradient(2px 2px at 160px 120px, rgba(255,255,255,0.3), transparent),
    radial-gradient(1.5px 1.5px at 230px 80px, rgba(255,255,255,0.4), transparent),
    radial-gradient(1px 1px at 300px 150px, rgba(255,255,255,0.25), transparent),
    radial-gradient(2px 2px at 370px 60px, rgba(255,255,255,0.5), transparent),
    radial-gradient(1.5px 1.5px at 450px 200px, rgba(255,255,255,0.3), transparent);
  background-size: 500px 250px;
  animation: twinkle 5s ease-in-out infinite;
  pointer-events: none;
}

@keyframes twinkle {
  0%, 100% { 
    opacity: 0.4; 
  }
  50% { 
    opacity: 1; 
  }
}

/* 星云光晕效果 */
.hero::after {
  content: '';
  position: absolute;
  top: -20%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(107, 33, 168, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  animation: float 20s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { 
    transform: translate(0, 0) scale(1); 
  }
  50% { 
    transform: translate(50px, 30px) scale(1.1); 
  }
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-image-wrapper {
  position: relative;
}

.hero-image {
  width: 100%;
  max-width: 520px;
  height: 600px;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border-subtle);
  transform: perspective(1000px) rotateY(-2deg);
  transition: all var(--duration-slow) cubic-bezier(0.4, 0, 0.2, 1);
  background-image: url('images/01 (1)_compressed.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hero-image-wrapper:hover .hero-image {
  transform: perspective(1000px) rotateY(0deg) scale(1.02);
  background-image: url('images/02_compressed.jpg');
}

.hero-text {
  color: var(--text-primary);
}

.hero-text h1 {
  font-size: clamp(2.25rem, 4vw, 3.5rem);
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.hero-text h1 span {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

.hero-text p {
  color: var(--text-secondary);
  font-size: var(--text-lg);
  margin-bottom: var(--spacing-xl);
  line-height: 1.8;
  max-width: 480px;
}

.btn-group {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.btn {
  padding: var(--spacing-sm) var(--spacing-xl);
  border-radius: var(--radius-full);
  font-weight: 600;
  text-decoration: none;
  transition: all var(--duration-normal) cubic-bezier(0.4, 0, 0.2, 1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
  font-size: var(--text-base);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left var(--duration-slow) ease;
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-primary:active {
  transform: translateY(-1px);
}

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

.btn-secondary:hover {
  border-color: var(--color-purple-mid);
  background: rgba(107, 33, 168, 0.1);
  transform: translateY(-2px);
}

/* ========================================
   FEATURES SECTION
   ======================================== */
.features {
  padding: var(--spacing-3xl) var(--spacing-lg);
  background: var(--color-bg-secondary);
}

.section-title {
  text-align: center;
  color: var(--text-primary);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  margin-bottom: var(--spacing-2xl);
  letter-spacing: -0.02em;
}

.section-title span {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.features-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--spacing-lg);
}

.feature-card {
  background: var(--color-bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: all var(--duration-normal) cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform var(--duration-normal) ease;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(107, 33, 168, 0.3);
  background: var(--color-bg-card-hover);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-icon {
  width: 64px;
  height: 64px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: var(--spacing-md);
  box-shadow: var(--shadow-sm);
}

.feature-card h3 {
  color: var(--text-primary);
  font-size: var(--text-xl);
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: var(--text-base);
  line-height: 1.8;
}

/* ========================================
   PRODUCT DETAILS SECTION
   ======================================== */
.product-details {
  padding: var(--spacing-3xl) var(--spacing-lg);
  background: linear-gradient(180deg, var(--color-bg-secondary) 0%, var(--color-bg-tertiary) 100%);
}

.details-container {
  max-width: 1200px;
  margin: 0 auto;
}

.carousel-wrapper {
  position: relative;
  margin-bottom: var(--spacing-lg);
}

.carousel {
  display: flex;
  overflow: hidden;
  border-radius: var(--radius-lg);
  position: relative;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-md);
}

.carousel-track {
  display: flex;
  transition: transform var(--duration-slow) cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

.carousel-slide {
  flex: 0 0 100%;
  width: 100%;
  min-width: 100%;
}

.carousel-slide img {
  width: 100%;
  height: 450px;
  object-fit: cover;
  display: block;
}

.carousel-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-medium);
  color: var(--text-primary);
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  transition: all var(--duration-normal) ease;
}

.carousel-nav:hover {
  background: var(--gradient-primary);
  transform: translateY(-50%) scale(1.05);
  box-shadow: var(--shadow-md);
}

.carousel-prev {
  left: var(--spacing-sm);
}

.carousel-next {
  right: var(--spacing-sm);
}

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.25);
  cursor: pointer;
  transition: all var(--duration-normal) ease;
}

.carousel-dot.active {
  background: var(--gradient-primary);
  width: 32px;
  border-radius: var(--radius-full);
}

.details-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.detail-item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--duration-normal) ease;
  border: 1px solid var(--border-subtle);
}

.detail-item:hover {
  transform: scale(1.03);
  box-shadow: var(--shadow-md);
  border-color: var(--color-purple-mid);
}

.detail-item img {
  width: 100%;
  height: 170px;
  object-fit: cover;
}

.detail-item .overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.85) 0%, rgba(0, 0, 0, 0) 100%);
  padding: var(--spacing-md) var(--spacing-md) var(--spacing-sm);
  color: var(--text-primary);
  font-size: var(--text-sm);
  font-weight: 500;
}

.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.92);
  backdrop-filter: blur(8px);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
}

.modal-overlay.active {
  display: flex;
  animation: fadeIn var(--duration-normal) ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-content {
  max-width: 95%;
  max-height: 90%;
  animation: scaleIn var(--duration-normal) ease;
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.modal-content img {
  max-width: 100%;
  max-height: 85vh;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
}

.modal-close {
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-medium);
  color: var(--text-primary);
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  cursor: pointer;
  font-size: 24px;
  transition: all var(--duration-normal) ease;
}

.modal-close:hover {
  background: var(--gradient-primary);
  transform: scale(1.05);
  box-shadow: var(--shadow-md);
}

.customization-info {
  margin-top: var(--spacing-3xl);
  padding: var(--spacing-xl);
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
}

.customization-info h3 {
  color: var(--text-primary);
  font-size: var(--text-2xl);
  margin-bottom: var(--spacing-lg);
}

.customization-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--spacing-xl);
}

.custom-item {
  text-align: center;
  padding: var(--spacing-md);
}

.custom-item .icon {
  width: 80px;
  height: 80px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-md);
  font-size: 32px;
  box-shadow: var(--shadow-sm);
}

.custom-item h4 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
  font-size: var(--text-lg);
}

.custom-item p {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.6;
}

.custom-process {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--border-subtle);
}

.custom-process h4 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  font-size: var(--text-xl);
}

.process-steps {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.process-step {
  flex: 1;
  min-width: 200px;
  text-align: center;
  position: relative;
  padding: var(--spacing-xl) var(--spacing-md);
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  transition: all var(--duration-normal) ease;
}

.process-step:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-purple-mid);
}

.process-icon {
  font-size: 40px;
  margin-bottom: var(--spacing-sm);
}

.process-step .number {
  width: 32px;
  height: 32px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  font-weight: 700;
  font-size: var(--text-base);
  margin: var(--spacing-sm) auto;
  box-shadow: var(--shadow-sm);
}

.process-step h5 {
  color: var(--text-primary);
  font-size: var(--text-lg);
  margin-bottom: var(--spacing-xs);
}

.process-step p {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.5;
  margin: 0;
}

.process-arrow {
  color: var(--text-muted);
  font-size: 28px;
  display: none;
}

@media (min-width: 900px) {
  .process-arrow {
    display: block;
  }
}

.safety-section {
  padding: var(--spacing-3xl) var(--spacing-lg);
  background: var(--color-bg-secondary);
}

.eclipse-section {
  margin-top: var(--spacing-3xl);
  background: linear-gradient(135deg, var(--color-bg-secondary) 0%, rgba(107, 33, 168, 0.1) 100%);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  border: 1px solid var(--border-subtle);
}

.eclipse-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.eclipse-header h3 {
  color: var(--text-primary);
  font-size: var(--text-3xl);
  margin-bottom: var(--spacing-sm);
}

.eclipse-header .subtitle {
  color: var(--text-accent);
  font-size: var(--text-lg);
}

/* 日食模拟容器 */
.eclipse-simulation {
  background: radial-gradient(ellipse at center, #0a0a1a 0%, #000 70%);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  margin-bottom: var(--spacing-xl);
  position: relative;
  overflow: hidden;
}

.simulation-container {
  width: 320px;
  height: 320px;
  margin: 0 auto;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* 星空背景 */
.stars {
  position: absolute;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(2px 2px at 20px 30px, #fff, transparent),
    radial-gradient(2px 2px at 40px 70px, rgba(255,255,255,0.8), transparent),
    radial-gradient(1px 1px at 90px 40px, #fff, transparent),
    radial-gradient(2px 2px at 160px 120px, rgba(255,255,255,0.9), transparent),
    radial-gradient(1px 1px at 230px 80px, #fff, transparent),
    radial-gradient(2px 2px at 280px 150px, rgba(255,255,255,0.7), transparent),
    radial-gradient(1px 1px at 50px 180px, #fff, transparent),
    radial-gradient(2px 2px at 180px 220px, rgba(255,255,255,0.8), transparent),
    radial-gradient(1px 1px at 260px 200px, #fff, transparent);
  background-repeat: repeat;
  background-size: 300px 300px;
  animation: twinkle 3s ease-in-out infinite;
  opacity: 0.3;
}

@keyframes twinkle {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.6; }
}

/* 太阳 */
.sun {
  width: 160px;
  height: 160px;
  background: radial-gradient(circle, #ffdd00 0%, #ff8c00 50%, #ff4500 100%);
  border-radius: 50%;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 
    0 0 60px rgba(255, 200, 0, 0.8),
    0 0 100px rgba(255, 150, 0, 0.6),
    0 0 140px rgba(255, 100, 0, 0.4);
  transition: all 1.5s ease;
  z-index: 1;
}

/* 月球 */
.moon {
  width: 150px;
  height: 150px;
  background: linear-gradient(135deg, #666 0%, #444 30%, #222 70%, #111 100%);
  border-radius: 50%;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(160px, -50%);
  transition: transform 2s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 
    inset -15px -15px 30px rgba(0,0,0,0.7),
    inset 5px 5px 10px rgba(100,100,100,0.2);
  z-index: 3;
}

/* 日冕 */
.corona {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, transparent 30%, rgba(255, 200, 100, 0.15) 50%, rgba(255, 150, 50, 0.08) 70%, transparent 100%);
  opacity: 0;
  transition: opacity 1.5s ease;
  z-index: 2;
}

.corona::before {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: radial-gradient(circle, transparent 45%, rgba(255, 220, 150, 0.1) 60%, transparent 70%);
}

.corona::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: radial-gradient(circle, transparent 55%, rgba(255, 200, 100, 0.05) 80%, transparent 100%);
}

/* 日食阶段样式 */
.eclipse-simulation.phase-1 .moon { transform: translateX(75px); }
.eclipse-simulation.phase-1 .sun { box-shadow: 0 0 60px rgba(255, 200, 0, 0.8), 0 0 100px rgba(255, 150, 0, 0.6); }

.eclipse-simulation.phase-2 .moon { transform: translateX(0); }
.eclipse-simulation.phase-2 .sun { box-shadow: 0 0 30px rgba(255, 200, 0, 0.4); }
.eclipse-simulation.phase-2 .corona { opacity: 1; }
.eclipse-simulation.phase-2 .stars { opacity: 0.8; }

.eclipse-simulation.phase-3 .moon { transform: translateX(-75px); }
.eclipse-simulation.phase-3 .sun { box-shadow: 0 0 60px rgba(255, 200, 0, 0.8), 0 0 100px rgba(255, 150, 0, 0.6); }
.eclipse-simulation.phase-3 .corona { opacity: 0.5; }

.eclipse-simulation.phase-4 .moon { transform: translateX(-200px); }
.eclipse-simulation.phase-4 .corona { opacity: 0; }

/* 阶段指示器 */
.phase-indicator {
  text-align: center;
  margin-top: var(--spacing-lg);
  color: var(--text-secondary);
}

.phase-name {
  color: var(--text-accent);
  font-weight: 600;
  font-size: var(--text-lg);
}

/* 阶段控制按钮 */
.phase-controls {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
  flex-wrap: wrap;
}

.phase-btn {
  background: rgba(107, 33, 168, 0.1);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--duration-normal) ease;
  font-size: var(--text-sm);
}

.phase-btn:hover {
  background: rgba(107, 33, 168, 0.2);
  border-color: var(--color-purple-mid);
  transform: translateY(-2px);
}

.phase-btn.active {
  background: var(--color-purple-mid);
  color: white;
  border-color: var(--color-purple-mid);
}

/* 进度条 */
.progress-bar {
  width: 100%;
  height: 6px;
  background: rgba(107, 33, 168, 0.2);
  border-radius: var(--radius-full);
  margin-top: var(--spacing-lg);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-purple-mid), var(--text-accent));
  border-radius: var(--radius-full);
  transition: width 0.5s ease;
  width: 0%;
}

/* 日食内容卡片 */
.eclipse-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.eclipse-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  border: 1px solid var(--border-subtle);
  transition: all var(--duration-normal) ease;
  position: relative;
  overflow: hidden;
}

.eclipse-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--color-purple-mid), transparent);
  opacity: 0;
  transition: opacity var(--duration-normal) ease;
}

.eclipse-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-purple-mid);
}

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

.card-icon {
  font-size: 32px;
  margin-bottom: var(--spacing-md);
}

.eclipse-card h4 {
  color: var(--text-primary);
  font-size: var(--text-lg);
  margin-bottom: var(--spacing-md);
  font-weight: 600;
}

.card-content p {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.7;
  margin-bottom: var(--spacing-sm);
}

.card-content ul {
  list-style: none;
  padding: 0;
  margin: var(--spacing-sm) 0;
}

.card-content li {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.8;
  padding-left: var(--spacing-lg);
  position: relative;
  margin-bottom: var(--spacing-xs);
}

.card-content li::before {
  content: '▶';
  position: absolute;
  left: 0;
  color: var(--text-accent);
  font-size: var(--text-xs);
}

/* 时间网格 */
.time-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
}

.time-item {
  background: rgba(107, 33, 168, 0.05);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
}

.time-label {
  display: block;
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-bottom: 4px;
}

.time-value {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-accent);
}

/* 地点卡片 */
.location-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--spacing-md);
}

.location-card {
  background: rgba(107, 33, 168, 0.05);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  text-align: center;
  transition: all var(--duration-normal) ease;
}

.location-card:hover {
  background: rgba(107, 33, 168, 0.1);
  transform: translateY(-2px);
}

.location-flag {
  font-size: 28px;
  margin-bottom: 4px;
}

.location-card h5 {
  color: var(--text-primary);
  font-size: var(--text-sm);
  margin-bottom: 4px;
}

.location-card p {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.location-tag {
  font-size: var(--text-xs);
  color: var(--text-accent);
}

/* 安全提示 */
.safety-tips {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.tip-item {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: rgba(107, 33, 168, 0.05);
  border-radius: var(--radius-md);
}

.tip-icon {
  font-size: 24px;
  flex-shrink: 0;
}

.tip-content strong {
  display: block;
  color: var(--text-primary);
  font-size: var(--text-sm);
  margin-bottom: 2px;
}

.tip-content p {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  margin: 0;
}

.safety-container {
  max-width: 1200px;
  margin: 0 auto;
}

.certifications-wrapper {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.certifications-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
}

.certification {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  text-align: center;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
}

.certification .badge {
  width: 130px;
  height: 130px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-lg);
  font-size: 52px;
  box-shadow: var(--shadow-md);
}

.certification h3 {
  color: var(--text-primary);
  font-size: var(--text-2xl);
  margin-bottom: var(--spacing-md);
}

.certification p {
  color: var(--text-secondary);
  line-height: 1.7;
}

.instructions {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
}

.instructions h3 {
  color: var(--text-primary);
  font-size: var(--text-2xl);
  margin-bottom: var(--spacing-lg);
}

.instruction-list {
  display: grid;
  gap: var(--spacing-md);
}

.instruction-item {
  display: flex;
  gap: var(--spacing-md);
  align-items: flex-start;
  padding: var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: background var(--duration-fast) ease;
}

.instruction-item:hover {
  background: rgba(255, 255, 255, 0.03);
}

.instruction-item .number {
  width: 36px;
  height: 36px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  font-weight: 700;
  font-size: var(--text-base);
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}

.instruction-item p {
  color: var(--text-secondary);
  margin-top: 4px;
  line-height: 1.7;
}

.specifications {
  padding: var(--spacing-3xl) var(--spacing-lg);
  background: linear-gradient(180deg, var(--color-bg-secondary) 0%, var(--color-bg-tertiary) 100%);
}

.specs-container {
  max-width: 850px;
  margin: 0 auto;
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
}

.specs-table th,
.specs-table td {
  padding: var(--spacing-md) var(--spacing-lg);
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
}

.specs-table th {
  background: rgba(107, 33, 168, 0.15);
  color: var(--text-primary);
  font-weight: 600;
  width: 30%;
}

.specs-table td {
  color: var(--text-secondary);
}

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

.specs-mobile {
  display: none;
}

.specs-mobile-item {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
}

.specs-mobile-item .label {
  color: var(--text-accent);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.specs-mobile-item .value {
  color: var(--text-secondary);
  line-height: 1.6;
}

.scenarios {
  padding: var(--spacing-3xl) var(--spacing-lg);
  background: var(--color-bg-secondary);
}

.scenarios-container {
  max-width: 1200px;
  margin: 0 auto;
}

.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--spacing-lg);
}

.scenario-item {
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md);
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  transition: all var(--duration-normal) ease;
  cursor: default;
}

.scenario-item:hover {
  transform: translateY(-6px);
  border-color: var(--color-purple-mid);
  box-shadow: var(--shadow-md);
  background: var(--color-bg-card-hover);
}

.scenario-item .icon {
  width: 64px;
  height: 64px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-md);
  font-size: 26px;
  box-shadow: var(--shadow-sm);
}

.scenario-item h4 {
  color: var(--text-primary);
  font-size: var(--text-base);
  font-weight: 500;
}

.faq {
  padding: var(--spacing-3xl) var(--spacing-lg);
  background: linear-gradient(180deg, var(--color-bg-secondary) 0%, var(--color-bg-tertiary) 100%);
}

.faq-container {
  max-width: 850px;
  margin: 0 auto;
}

.faq-item {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-sm);
  border: 1px solid var(--border-subtle);
  overflow: hidden;
  transition: all var(--duration-normal) ease;
  box-shadow: var(--shadow-sm);
}

.faq-item:hover {
  border-color: var(--border-medium);
}

.faq-question {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: var(--text-base);
  font-weight: 500;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all var(--duration-normal) ease;
  text-align: left;
}

.faq-question:hover {
  background: rgba(107, 33, 168, 0.1);
}

.faq-question .arrow {
  font-size: 18px;
  color: var(--text-accent);
  transition: transform var(--duration-normal) ease;
}

.faq-question.active .arrow {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--duration-normal) ease;
}

.faq-answer.active {
  max-height: 220px;
}

.faq-answer p {
  padding: 0 var(--spacing-lg) var(--spacing-md);
  color: var(--text-secondary);
  line-height: 1.8;
}

.cta {
  padding: var(--spacing-3xl) var(--spacing-lg);
  background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-purple-deep) 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 50% 0%, rgba(107, 33, 168, 0.2) 0%, transparent 70%);
  pointer-events: none;
}

.cta-container {
  max-width: 700px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.cta h2 {
  color: var(--text-primary);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  margin-bottom: var(--spacing-md);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.cta p {
  color: var(--text-secondary);
  font-size: var(--text-lg);
  margin-bottom: var(--spacing-xl);
  line-height: 1.7;
}

footer {
  padding: var(--spacing-2xl) var(--spacing-lg);
  background: var(--color-bg-primary);
  border-top: 1px solid var(--border-subtle);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.footer-left .logo-icon {
  width: 36px;
  height: 36px;
  font-size: 18px;
}

.footer-left .logo-text {
  font-size: var(--text-base);
  font-weight: 600;
}

.footer-right {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

.contact-link {
  color: var(--text-secondary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  transition: all var(--duration-normal) ease;
  font-size: var(--text-sm);
}

.contact-link:hover {
  color: var(--text-primary);
  transform: translateY(-2px);
}

.copyright {
  text-align: center;
  margin-top: var(--spacing-xl);
  color: var(--text-muted);
  font-size: var(--text-sm);
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .hamburger {
    display: flex;
  }
  
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--spacing-xl);
  }
  
  .btn-group {
    justify-content: center;
  }
  
  .hero-image {
    max-width: 380px;
  }
  
  .certifications-row {
    grid-template-columns: 1fr;
  }
  
  .specs-table {
    display: none;
  }
  
  .specs-mobile {
    display: block;
  }
  
  .process-step:not(:last-child)::after {
    display: none;
  }
  
  .process-steps {
    gap: var(--spacing-md);
  }

  .carousel-slide img {
    height: 320px;
  }
}

@media (max-width: 480px) {
  .hero {
    padding-top: 120px;
  }

  .btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--text-sm);
  }
  
  .feature-card {
    padding: var(--spacing-lg);
  }
  
  .footer-right {
    flex-direction: column;
    gap: var(--spacing-sm);
    width: 100%;
    align-items: flex-start;
  }

  .footer-container {
    flex-direction: column;
    align-items: flex-start;
  }

  .carousel-slide img {
    height: 260px;
  }

  .details-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.section-hidden {
  opacity: 0;
  transform: translateY(30px);
}

.section-visible {
  animation: fadeInUp 0.6s ease forwards;
}

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