body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Segoe UI", sans-serif;
  background: #eef2f7;
  color: #1a1a1a;
  display: flex;
  justify-content: center;
  padding: 1rem;
  min-height: 100vh;
  position: relative; /* 为伪元素定位提供上下文 */
  overflow-x: hidden; /* 防止 emoji 溢出 */
}

/* 背景添加多个 emoji 装饰 */
body::before, body::after, body > .emoji-deco-1::before, body > .emoji-deco-2::after, body > .emoji-deco-3::before {
  position: absolute;
  font-size: 2.5rem; /* 稍大一点，增加趣味 */
  opacity: 0.15; /* 透明度，保持背景清淡 */
  pointer-events: none; /* 防止交互干扰 */
  z-index: -1; /* 放在内容后面 */
  animation: float 5s ease-in-out infinite; /* 添加漂浮动画 */
}

/* 不同位置的 emoji */
body::before {
  content: "😊🎉";
  top: 5%;
  left: 10%;
  transform: rotate(-10deg);
}

body::after {
  content: "🌟😺";
  bottom: 10%;
  right: 8%;
  transform: rotate(15deg);
  animation-delay: 1s; /* 动画延迟，错开节奏 */
}

body > .emoji-deco-1::before {
  content: "💖🚀";
  top: 20%;
  right: 15%;
  transform: rotate(-20deg);
  animation-delay: 2s;
}

body > .emoji-deco-2::after {
  content: "🎈🍓";
  bottom: 25%;
  left: 12%;
  transform: rotate(10deg);
  animation-delay: 3s;
}

body > .emoji-deco-3::before {
  content: "😸🌈";
  top: 35%;
  left: 20%;
  transform: rotate(-5deg);
  animation-delay: 4s;
}

/* 漂浮动画 */
@keyframes float {
  0%, 100% { transform: translateY(0) rotate(var(--rotate)); }
  50% { transform: translateY(-15px) rotate(var(--rotate)); }
}

/* 响应式调整：小屏幕上减小 emoji */
@media (max-width: 600px) {
  body::before, body::after, body > .emoji-deco-1::before, body > .emoji-deco-2::after, body > .emoji-deco-3::before {
    font-size: 1.8rem;
  }
}

.container {
  max-width: 480px;
  background: linear-gradient(135deg, #ffffff, #f9fcff); /* 添加轻微渐变背景 */
  padding: 2rem 1.5rem 3rem 1.5rem;
  border-radius: 24px;
  box-shadow: 0 12px 40px rgba(50, 50, 93, 0.1);
  width: 100%;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative; /* 为答题界面的装饰提供上下文 */
  border: 2px solid #e6f0ff; /* 添加浅蓝色边框 */
}

/* 答题界面装饰：添加角落 emoji */
.container::before, .container::after {
  content: "✨";
  position: absolute;
  font-size: 1.5rem;
  opacity: 0.3;
  pointer-events: none;
  z-index: 1;
}

.container::before {
  top: 10px;
  left: 10px;
  transform: rotate(-15deg);
}

.container::after {
  bottom: 10px;
  right: 10px;
  transform: rotate(15deg);
}

/* 答题区域装饰 */
#quiz-box {
  position: relative;
  padding: 1.5rem;
  border-radius: 18px;
  background: #f0f6ff; /* 浅蓝色背景 */
  box-shadow: 0 5px 15px rgba(74, 144, 226, 0.1); /* 轻微阴影 */
  width: 100%;
}

/* 题目装饰：添加下划线效果 */
#question {
  font-size: 1.3rem;
  margin-bottom: 1.2rem;
  color: #2c3e50;
  font-weight: 600;
  text-align: center;
  min-height: 54px;
  position: relative;
}

#question::after {
  content: "🌈";
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 1rem;
  opacity: 0.4;
}

/* 选项按钮样式 */
#options button {
  display: block;
  width: 100%;
  margin-bottom: 0.7rem;
  padding: 0.75rem 1.2rem;
  font-size: 1.05rem;
  border-radius: 14px;
  border: 1.5px solid #4a90e2;
  background: #f5faff;
  color: #2a3a5d;
  cursor: pointer;
  transition: background-color 0.25s, color 0.25s, border-color 0.25s, transform 0.2s;
  position: relative;
  overflow: hidden;
}

/* 选项按钮悬停效果 */
#options button:hover:not(:disabled) {
  background: #4a90e2;
  color: white;
  border-color: #357ABD;
  transform: scale(1.02); /* 轻微放大 */
}

/* 禁用状态 */
#options button:disabled {
  background: #d1d9e6;
  cursor: default;
  color: #7f8fa6;
  border-color: #a9b7d6;
}

/* 选项按钮装饰：添加小 emoji */
#options button::before {
  content: "😉";
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.9rem;
  opacity: 0.2;
  transition: opacity 0.3s;
}

#options button:hover::before {
  opacity: 0.4;
}

.response {
  font-weight: 600;
  margin-top: 1rem;
  margin-bottom: 0.5rem;
  text-align: center;
  min-height: 28px;
  color: #3b5998;
  font-style: italic;
  position: relative;
}

.response::before {
  content: "💬";
  position: absolute;
  left: -20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1rem;
  opacity: 0.3;
}

button#next-btn, button#restart-btn, #message-form button {
  background: #357ABD;
  color: white;
  border: none;
  border-radius: 18px;
  padding: 0.8rem 1.5rem;
  font-size: 1.1rem;
  cursor: pointer;
  margin-top: 1.3rem;
  width: 100%;
  box-shadow: 0 5px 15px rgba(53, 122, 189, 0.35);
  transition: background-color 0.3s, transform 0.2s;
  font-weight: 600;
  position: relative;
}

button#next-btn:hover, button#restart-btn:hover, #message-form button:hover {
  background: #255a9c;
  transform: scale(1.03);
}

/* 按钮装饰 */
button#next-btn::after, button#restart-btn::after, #message-form button::after {
  content: "🚀";
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.9rem;
  opacity: 0.5;
}

textarea {
  width: 100%;
  padding: 1rem 1.2rem;
  font-size: 1rem;
  border-radius: 18px;
  border: 1.7px solid #ced9eb;
  resize: vertical;
  min-height: 70px;
  box-sizing: border-box;
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Segoe UI", sans-serif;
  color: #2a3a5d;
  transition: border-color 0.3s, background 0.3s;
}

textarea:focus {
  outline: none;
  border-color: #4a90e2;
  background: #f0f6ff;
}

/* 留言框装饰 */
textarea::before {
  content: "📝";
  position: absolute;
  left: 10px;
  top: 10px;
  font-size: 1rem;
  opacity: 0.3;
}

#message-box {
  width: 100%;
  margin-top: 2.5rem;
  position: relative;
}

#thanks-msg {
  margin-top: 0.6rem;
  font-weight: 600;
  text-align: center;
  color: #3c763d;
  position: relative;
}

#thanks-msg::after {
  content: "🎉";
  position: absolute;
  right: -20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1rem;
  opacity: 0.4;
}

#game-history {
  margin-top: 2rem;
  width: 100%;
  background: #f0f4fb;
  border-radius: 18px;
  padding: 1rem 1.2rem;
  color: #4a5a7a;
  font-size: 0.9rem;
  box-sizing: border-box;
  user-select: none;
  position: relative;
}

#game-history::before {
  content: "🏆";
  position: absolute;
  top: 10px;
  left: 10px;
  font-size: 1rem;
  opacity: 0.3;
}

@media (max-width: 400px) {
  .container {
    padding: 1.2rem 1rem 2rem 1rem;
  }

  button#next-btn, button#restart-btn, #message-form button {
    font-size: 1rem;
    padding: 0.7rem 1rem;
  }

  body::before, body::after, body > .emoji-deco-1::before, body > .emoji-deco-2::after, body > .emoji-deco-3::before {
    font-size: 1.5rem;
  }

  .container::before, .container::after {
    font-size: 1.2rem;
  }
}