/* ============================
   base.css - Banquet PPT 基础样式
   ============================ */

/* 1. Reset 基础样式 (简化版 normalize) */
*{
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Noto Sans SC', sans-serif;
}

html,
body {
  height: 100%;
  width: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji",
    "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  background-color: #111; /* 深色背景，适合投影 */
  color: #fff;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow: hidden; /* 防止出现滚动条 */
}

/* 2. 容器样式 */
#app {
  height: 100%;
  width: 100%;
  position: relative;
  overflow: hidden;
}

/* 3. 幻灯片基础样式 */
.banquet-slide {
  display: none; /* 默认隐藏，js 会控制显示 */
  height: 100%;
  width: 100%;
  padding: 2rem;
  position: absolute;
  top: 0;
  left: 0;

  background-color: #222; /* 默认深灰背景 */
  background-size: cover;
  background-position: center;

  display: flex;
  align-items: center;
  justify-content: center;

  font-size: 2rem;
  transition: opacity 0.4s ease, transform 0.4s ease;
}

/* 当前显示的 slide（可选效果：淡入） */
.banquet-slide[style*="block"] {
  opacity: 1;
  z-index: 1;
}
.banquet-slide[style*="none"] {
  opacity: 0;
  z-index: 0;
}

/* 4. 标题/正文默认样式 */
h1,
h2,
h3 {
  font-weight: bold;
  margin-bottom: 1rem;
}

h1 {
  font-size: 3rem;
}

h2 {
  font-size: 2.2rem;
}

h3 {
  font-size: 1.6rem;
}

p {
  margin-bottom: 1rem;
  font-size: 1.2rem;
}

/* 5. 辅助类 */
.text-center {
  text-align: center;
}
.text-right {
  text-align: right;
}
.text-left {
  text-align: left;
}

.mt-1 {
  margin-top: 0.5rem;
}
.mt-2 {
  margin-top: 1rem;
}
.mt-3 {
  margin-top: 1.5rem;
}

/* 6. 简单过渡动画（可选） */
.fade-in {
  animation: fadeIn 0.6s ease forwards;
}
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(15px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}