/* 全局样式 */
html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  min-height: 100%; /* 保证基础高度 */
  height: auto;     /* 避免 vh 计算错误 */
  touch-action: pan-x pan-y; /* 禁止双指缩放，只允许单指平移 */
}

body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: linear-gradient(135deg, rgb(214,238,250), rgb(180,222,250), rgb(240,248,255));
}


/* 容器样式（主样式） */
.container {
    background: rgba(255, 255, 255, 0.9);
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    text-align: center;

    width: 80vw;            /* 使用相对宽度，适配更多屏幕 */
    max-width: 500px;       /* 限制最大宽度 */
    min-width: 280px;       /* 防止横屏时太窄 */

    margin: 40px;           /* 外边距 */
    box-sizing: border-box;
    flex-shrink: 0;         /* 防止横屏下被压缩变形 */

    /* ✅ 添加动画属性 */
    opacity: 0; /* 初始透明 */
    transform: translateY(-30px); /* 初始偏移 */
    animation: fadeSlideDown 0.8s ease-out forwards; /* 动画 */
}


/* 横屏优化（视口较矮时的特殊处理） */
@media screen and (orientation: landscape) and (max-height: 500px) {
    .container {
        width: 90vw;
        min-width: 300px;
        margin: 20px 10px;
    }

    .tip-message {
        font-size: 13px;
        padding: 8px 10px;
    }
}

/* 修正全局高度计算问题，兼容移动端横屏 */
html, body {
    min-height: 100vh;
    height: auto;
    overflow-x: hidden;
    margin: 0;
    padding: 0;
    width: 100%;
}


/* 标题 */
h2 {
  margin-bottom: 10px;
  color: #333;
}

/* 副标题 */
.subtitle {
  font-size: 14px;
  color: #666;
  margin-bottom: 20px;
}

/* 输入区域 */
.input-container {
  display: flex;
  width: 100%;
  position: relative;
  margin-bottom: 15px;
}

.engine-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 10px;
  background: white;
  border: 2px solid #ccc;
  border-right: none;
  border-radius: 5px 0 0 5px;
  cursor: pointer;
  z-index: 2;
}

.engine-wrapper img {
  width: 20px;
  height: 20px;
}

/* 输入框 */
input[type="text"] {
  flex: 1;
  padding: 10px;
  border: 2px solid #ccc;
  border-left: none;
  border-radius: 0 5px 5px 0;
  font-size: 16px;
  outline: none;
  box-sizing: border-box;
  min-width: 0;
}

input[type="text"]::placeholder {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 搜索引擎下拉 */
.engine-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  background: white;
  border: 1px solid #ccc;
  border-radius: 5px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  width: 120px;
  opacity: 0;
  transform: translateY(-8px);
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
  z-index: 10;
}

.engine-dropdown.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.engine-dropdown div {
  padding: 8px 12px;
  cursor: pointer;
  font-size: 14px;
}

.engine-dropdown div:hover {
  background-color: #f0f0f0;
}

/* 按钮 */
button {
  width: 100%;
  padding: 10px;
  margin-top: 15px;
  background: linear-gradient(135deg, rgb(180, 222, 250), rgb(120, 190, 250));
  color: white;
  border: none;
  border-radius: 5px;
  font-size: 18px;
  cursor: pointer;
  transition: 0.3s;
}

button:hover {
  background: linear-gradient(135deg, rgb(150, 210, 250), rgb(90, 170, 240));
}

/* 提示信息系统 */
.tip-message {
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.3s ease;
  margin-top: 15px;
  padding: 10px 15px;
  border-radius: 6px;
  font-size: 14px;
  width: 100%;
  box-sizing: border-box;
  text-align: center;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  pointer-events: none;
  background: rgba(255, 255, 255, 0.8);
}

/* 提示信息：可见状态 */
.tip-message.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* 提示类型 */
.tip-error {
  background-color: #fcebea;
  color: #a94442;
  border: 1px solid #f5c6cb;
}

.tip-success {
  background-color: #e6ffed;
  color: #2c662d;
  border: 1px solid #b2f5ca;
}

.tip-info {
  background-color: #ebf4ff;
  color: #2b6cb0;
  border: 1px solid #c3dafe;
}

/* 抖动动画 */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-5px); }
  40%, 80% { transform: translateX(5px); }
}

.tip-message.shake {
  animation: shake 0.4s ease;
}

/* 底部 */
footer {
  width: 100%;
  text-align: center;
  font-size: 14px;
  color: #666;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 10px 0;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInFooter 0.8s ease-out forwards;
  animation-delay: 0.8s;
}

.footer-right {
  display: flex;
  gap: 20px;
  margin-bottom: 10px;
}

.icon-img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  transition: all 0.3s ease;
  background: rgba(255, 255, 255, 0.9);
  padding: 5px;
  display: block;
}

.icon-img:hover {
  transform: scale(1.1) rotate(-5deg);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* 版权声明样式 */
.copyright {
  font-size: 16px;
  color: #333;
  text-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
  margin-top: 10px;
}

/* 动画：容器加载 */
@keyframes fadeSlideDown {
  0% {
    opacity: 0;
    transform: translateY(-30px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 动画：底部加载 */
@keyframes fadeInFooter {
  0% {
    opacity: 0;
    transform: translateY(20px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 响应式设计 */
@media (max-width: 480px) {
  .container {
    padding: 25px 15px;
  }

  select, input[type="text"] {
    padding: 14px 16px;
    font-size: 15px;
  }

  select {
    background-position: right 14px center;
    background-size: 20px;
    padding-right: 44px;
  }

  button {
    padding: 14px 20px;
    font-size: 16px;
  }

  .icon-img {
    width: 35px;
    height: 35px;
  }
}

/* 爱心样式 */
.heart {
  position: absolute;
  font-size: 16px;
  pointer-events: none;
  animation: float-up 1s ease-out forwards;
}

@keyframes float-up {
  0% { transform: translateY(0) scale(1); opacity: 1; }
  100% { transform: translateY(-30px) scale(1.5); opacity: 0; }
}

/* 全局禁止选中 */
body, body * {
  user-select: none;
  -webkit-user-select: none; /* Safari/Chrome */
  -moz-user-select: none;    /* Firefox */
  -ms-user-select: none;     /* IE10+ */
}

/* 输入框允许选中 */
input[type="text"], textarea {
  user-select: text;
  -webkit-user-select: text;
  -moz-user-select: text;
  -ms-user-select: text;
}

/* 语言切换 */
.lang-wrapper {
  position: fixed;
  top: 15px;
  right: 15px;
  z-index: 999;
}

.lang-btn {
  padding: 8px 20px;
  border: none;
  background: rgba(255, 255, 255, 0.9);
  color: #333;
  font-size: 14px;
  border-radius: 25px;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  transition: all 0.2s ease;
  backdrop-filter: blur(6px);
}

.lang-btn:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.25);
  transform: translateY(-1px);
}

/* 下拉菜单默认状态 */
.lang-dropdown {
  opacity: 0;
  transform: translateY(-10px) scale(0.95);
  transition: all 0.25s ease;
  pointer-events: none;

  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 6px;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(8px);
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  overflow: hidden;
}

/* 激活状态：展开 */
.lang-wrapper.active .lang-dropdown {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}


.lang-dropdown a {
  display: block;
  padding: 10px 20px;
  font-size: 14px;
  color: #333;
  text-decoration: none;
  white-space: nowrap;
}

.lang-dropdown a:hover {
  background: rgba(0,0,0,0.05);
}

/* 点击展开 */
.lang-wrapper.active .lang-dropdown {
  display: block;
}