body {
  margin: 0;
  font-family: "微軟正黑體", sans-serif;
  background: linear-gradient(135deg, #0f0f23 0%, #1a1a2e 50%, #16213e 100%);
  color: #f0f0f0;
  min-height: 100vh;
}

.topnav {
  background: rgba(28, 28, 28, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 2px solid #00ffff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 30px;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 4px 20px rgba(0, 255, 255, 0.1);
}

.logo {
  color: #ffffff;
  font-size: 20px;
  font-weight: bold;
  text-shadow: 0 0 10px rgba(0, 255, 255, 0.5);
}

nav ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 10px;
}

nav ul li {
  position: relative;
}

nav ul li a {
  display: block;
  color: #f0f0f0;
  padding: 12px 18px;
  text-decoration: none;
  font-size: 14px;
  border-radius: 8px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

nav ul li a::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

nav ul li a:hover::before {
  left: 100%;
}

nav ul li a:hover {
  background: linear-gradient(135deg, #00ffff, #0080ff);
  color: #000;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(0, 255, 255, 0.3);
}

.dropdown-content {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: rgba(34, 34, 34, 0.95);
  backdrop-filter: blur(10px);
  min-width: 200px;
  box-shadow: 0 8px 25px rgba(0,0,0,0.3);
  z-index: 999;
  border-radius: 12px;
  border: 1px solid rgba(0, 255, 255, 0.2);
  animation: fadeInDown 0.3s ease;
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.dropdown-content li a {
  padding: 12px 16px;
  font-size: 13px;
  color: #ccc;
  border-radius: 0;
}

.dropdown-content li a:hover {
  background: linear-gradient(135deg, #00ffff, #0080ff);
  color: #000;
  transform: none;
  box-shadow: none;
}

.dropdown:hover .dropdown-content {
  display: block;
}

.content {
  padding: 50px 80px;
  max-width: 1200px;
  margin: 0 auto;
}

h1 {
  font-size: 32px;
  color: #00ffff;
  margin-bottom: 30px;
  text-align: center;
  text-shadow: 0 0 20px rgba(0, 255, 255, 0.5);
  position: relative;
}

h1::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 3px;
  background: linear-gradient(90deg, #00ffff, #0080ff);
  border-radius: 2px;
}

h2 {
  font-size: 24px;
  color: #f093fb;
  margin-bottom: 20px;
  text-shadow: 0 0 15px rgba(240, 147, 251, 0.3);
}

.intro {
  background: rgba(26, 26, 26, 0.8);
  backdrop-filter: blur(10px);
  padding: 30px;
  border-radius: 20px;
  border: 1px solid rgba(0, 255, 255, 0.2);
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
  margin-bottom: 30px;
  animation: slideInUp 0.6s ease;
}

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

.intro p {
  line-height: 1.8;
  color: #e0e0e0;
  margin-bottom: 20px;
}

.intro ul {
  padding-left: 20px;
}

.intro li {
  line-height: 1.8;
  color: #d0d0d0;
  margin-bottom: 8px;
  position: relative;
  padding-left: 25px;
}

.intro li::before {
  content: '✨';
  position: absolute;
  left: 0;
  top: 2px;
  font-size: 14px;
}

/* 卡片設計 */
.card {
  background: rgba(26, 26, 26, 0.8);
  backdrop-filter: blur(10px);
  padding: 25px;
  border-radius: 15px;
  border: 1px solid rgba(0, 255, 255, 0.2);
  box-shadow: 0 8px 25px rgba(0,0,0,0.2);
  margin-bottom: 20px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #00ffff, #0080ff, #f093fb);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(0,0,0,0.3);
  border-color: rgba(0, 255, 255, 0.4);
}

.card h3 {
  color: #00ffff;
  margin-bottom: 15px;
  font-size: 20px;
}

.card p {
  color: #e0e0e0;
  line-height: 1.6;
  margin-bottom: 15px;
}

.card ul {
  list-style: none;
  padding: 0;
}

.card li {
  padding: 8px 0;
  color: #d0d0d0;
  position: relative;
  padding-left: 25px;
  transition: all 0.3s ease;
}

.card li:hover {
  color: #f093fb;
  transform: translateX(5px);
}

.card li::before {
  content: '🎯';
  position: absolute;
  left: 0;
  top: 8px;
  font-size: 14px;
}

/* 警告提示 */
.warning {
  background: linear-gradient(135deg, rgba(255, 136, 136, 0.1), rgba(255, 68, 68, 0.1));
  border: 1px solid rgba(255, 136, 136, 0.3);
  color: #ff8888;
  padding: 15px;
  border-radius: 10px;
  margin-top: 20px;
  position: relative;
}

.warning::before {
  content: '⚠️';
  position: absolute;
  left: 15px;
  top: 15px;
  font-size: 16px;
}

.warning p {
  margin: 0;
  padding-left: 30px;
  line-height: 1.6;
}

/* 響應式設計 */
@media (max-width: 768px) {
  .content {
    padding: 30px 20px;
  }
  
  .topnav {
    padding: 10px 15px;
    flex-direction: column;
    gap: 15px;
  }
  
  nav ul {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  h1 {
    font-size: 24px;
  }
  
  .intro {
    padding: 20px;
  }
}

/* 累積贊助禮包頁面樣式 */
.reward-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  margin: 30px 0;
  flex-wrap: wrap;
}

.reward-button {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  padding: 15px 30px;
  border-radius: 25px;
  font-size: 18px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0,0,0,0.2);
  position: relative;
  overflow: hidden;
}

.reward-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.3);
  background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
}

.reward-button.active {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  transform: scale(1.05);
}

.reward-button::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 0.5s;
}

.reward-button:hover::before {
  left: 100%;
}

.reward-box {
  display: none;
  margin-top: 30px;
  padding: 30px;
  border: 2px solid #667eea;
  border-radius: 15px;
  background: linear-gradient(135deg, #1a1a1a 0%, #2a2a2a 100%);
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
  animation: slideIn 0.5s ease-out;
  position: relative;
  overflow: hidden;
}

.reward-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #667eea, #764ba2, #f093fb, #f5576c);
}

.reward-box.active {
  display: block;
}

.reward-box h2 {
  color: #f093fb;
  text-align: center;
  margin-bottom: 25px;
  font-size: 24px;
  text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.reward-box ul {
  margin-left: 20px;
  list-style: none;
}

.reward-box li {
  padding: 8px 0;
  color: #e0e0e0;
  font-size: 16px;
  position: relative;
  padding-left: 25px;
  transition: all 0.3s ease;
}

.reward-box li:hover {
  color: #f093fb;
  transform: translateX(5px);
}

.reward-box li::before {
  content: '🎁';
  position: absolute;
  left: 0;
  top: 8px;
  font-size: 14px;
}

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

.selection-text {
  text-align: center;
  color: #888;
  font-size: 18px;
  margin: 20px 0;
  font-style: italic;
}

.highlight {
  color: #f093fb;
  font-weight: bold;
}