/* ==================== 全局样式 ==================== */
@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@400;600;700&family=Poppins:wght@300;400;500;600&display=swap');

:root {
  --bg-primary: #0f0f1a;
  --bg-secondary: #1a1a2e;
  --bg-card: #16213e;
  --accent: #e94560;
  --accent-hover: #ff6b6b;
  --gold: #ffd700;
  --gold-dark: #b8860b;
  --text-primary: #eaeaea;
  --text-secondary: #a0a0a0;
  --gradient-mystic: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --shadow-glow: 0 0 20px rgba(233, 69, 96, 0.3);
  --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.4);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Poppins', system-ui, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* 背景装饰 */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 20%, rgba(102, 126, 234, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(118, 75, 162, 0.1) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

h1, h2, h3, h4 {
  font-family: 'Cinzel', serif;
  font-weight: 600;
}

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

/* ==================== 容器 ==================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ==================== 导航栏 ==================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(15, 15, 26, 0.95);
  backdrop-filter: blur(10px);
  padding: 15px 0;
  z-index: 1000;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: 'Cinzel', serif;
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--gold) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  gap: 30px;
  align-items: center;
}

.nav-links a {
  font-size: 0.95rem;
  color: var(--text-secondary);
  transition: color 0.3s;
  position: relative;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gold);
  transition: width 0.3s;
}

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

/* 语言切换器 */
.lang-switcher {
  position: relative;
  display: inline-block;
}

.lang-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 8px 15px;
  border-radius: 25px;
  color: var(--text-primary);
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.3s;
}

.lang-btn:hover {
  border-color: var(--gold);
  box-shadow: 0 0 15px rgba(255, 215, 0, 0.2);
}

.lang-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 10px;
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  padding: 10px 0;
  min-width: 180px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.3s;
  box-shadow: var(--shadow-card);
  z-index: 1001;
}

.lang-dropdown.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-dropdown a {
  display: block;
  padding: 10px 20px;
  color: var(--text-secondary);
  transition: all 0.2s;
}

.lang-dropdown a:hover {
  background: rgba(255, 215, 0, 0.1);
  color: var(--gold);
}

.lang-dropdown a.active {
  color: var(--gold);
  background: rgba(255, 215, 0, 0.05);
}

/* ==================== Hero 区域 ==================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 20px 60px;
  position: relative;
}

.hero-content {
  max-width: 800px;
  animation: fadeInUp 1s ease;
}

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

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--gold) 0%, #fff 50%, var(--gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero .subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  line-height: 1.8;
}

.hero .cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--gradient-mystic);
  color: white;
  padding: 15px 40px;
  border-radius: 50px;
  font-size: 1.1rem;
  font-weight: 500;
  transition: all 0.3s;
  border: none;
  cursor: pointer;
}

.hero .cta-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 30px rgba(102, 126, 234, 0.4);
}

/* 装饰符号 */
.stars {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  overflow: hidden;
  pointer-events: none;
}

.star {
  position: absolute;
  width: 3px;
  height: 3px;
  background: var(--gold);
  border-radius: 50%;
  animation: twinkle 3s infinite;
}

@keyframes twinkle {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

/* ==================== 功能卡片 ==================== */
.features {
  padding: 80px 0;
}

.features h2 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 50px;
  color: var(--gold);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.feature-card {
  background: var(--bg-card);
  border-radius: 20px;
  padding: 40px 30px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: all 0.4s ease;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), var(--accent));
  transform: scaleX(0);
  transition: transform 0.4s;
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-glow);
  border-color: rgba(255, 215, 0, 0.3);
}

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

.feature-card .icon {
  font-size: 4rem;
  margin-bottom: 20px;
  display: block;
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: 15px;
  color: var(--text-primary);
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ==================== Footer ==================== */
.footer {
  text-align: center;
  padding: 40px 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer .social-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 20px;
}

.footer .social-links a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: all 0.3s;
}

.footer .social-links a:hover {
  background: var(--accent);
  transform: translateY(-3px);
}

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
  /* 汉堡菜单按钮 */
  .hamburger {
    display: flex;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
    z-index: 1001;
  }

  .hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 3px;
    transition: all 0.3s;
  }

  .hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
  }

  .hamburger.active span:nth-child(2) {
    opacity: 0;
  }

  .hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
  }

  /* 隐藏原有 nav-links */
  .nav-links {
    display: none;
  }

  /* 移动端激活时显示 */
  .nav-links.mobile-active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    padding: 20px;
    gap: 15px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
  }

  .nav-links.mobile-active a {
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }

  .lang-btn {
    font-size: 1rem;
    padding: 12px 20px;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

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

  .page-header {
    padding: 120px 0 50px;
  }

  .page-header h1 {
    font-size: 2rem;
  }
}

/* ==================== 通用按钮 ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 30px;
  border-radius: 30px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s;
  border: none;
  font-family: inherit;
}

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

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(233, 69, 96, 0.3);
}

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

.btn-outline:hover {
  background: var(--gold);
  color: var(--bg-primary);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ==================== 页面标题 ==================== */
.page-header {
  padding: 140px 0 60px;
  text-align: center;
  background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.page-header h1 {
  font-size: 2.8rem;
  margin-bottom: 15px;
  color: var(--gold);
}

.page-header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* ==================== 加载动画 ==================== */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: var(--gold);
  animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ==================== Toast 提示 ==================== */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--bg-card);
  padding: 15px 30px;
  border-radius: 10px;
  border: 1px solid var(--gold);
  color: var(--text-primary);
  font-size: 0.95rem;
  opacity: 0;
  transition: all 0.3s;
  z-index: 9999;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}