.chat-container {
    position: fixed;
    bottom: calc(var(--footer-height, 32px) + 18px);
    left: 0;
    width: 100%;
    background: transparent;
    display: flex;
    flex-direction: column;
    align-items: center;
    z-index: 1000;
}

.chat-box {
    width: 90%;
    min-height: 20px;
    max-height: 50vh;
    overflow-y: auto;
    backdrop-filter: blur(var(--card_filter));
    -webkit-backdrop-filter: blur(var(--card_filter));
    background: var(--item_bg_color);
    border: 1px solid rgba(255, 255, 255, 0.12);
    background-clip: padding-box;
    margin-bottom: 15px;
    padding: 20px;
    border-radius: 13px;
    position: relative;
    z-index: 10;
    display: none;
    box-shadow: 0 8px 16px -4px rgba(0, 0, 0, 0.1);
}

.chat-box.show {
    animation: slideUp 0.3s ease-out forwards;
}

.chat-box.hide {
    animation: slideDown 0.3s ease-in forwards;
}

.message {
    margin: 8px 0;
    padding: 12px 18px;
    max-width: 80%;
    width: fit-content; /* 让气泡宽度随文字内容自适应 */
    min-width: 10px;
    display: block;
    border-radius: 16px;
    word-break: break-word;
    transition: all 0.3s ease;
    backdrop-filter: blur(var(--card_filter));
    -webkit-backdrop-filter: blur(var(--card_filter));
    user-select: text;
    position: relative;
}

.copy-button {
    position: absolute;
    top: 8px;
    right: 8px;
    background: rgba(0, 0, 0, 0.3);
    color: white;
    border: none;
    border-radius: 4px;
    padding: 4px 8px;
    font-size: 12px;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.message:hover .copy-button {
    opacity: 1;
}

.message.user {
    background: rgba(255, 255, 255, 0.25);
    border: 1px solid rgba(255, 255, 255, 0.15);
    align-self: flex-end;
    text-align: left;
    margin-left: auto;
    color: var(--main_text_color);
}

.message.bot {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.10);
    align-self: flex-start;
    text-align: left;
    margin-right: auto;
    font-size: 14px;
    line-height: 1.6;
    color: var(--main_text_color);
}

/* 清除常见 markdown 元素的默认 margin */
.message.bot h1,
.message.bot h2,
.message.bot h3,
.message.bot p,
.message.bot ul,
.message.bot ol,
.message.bot pre,
.message.bot code {
  margin: 0;
  padding: 0;
  font-size: inherit;
}

/* 更友好地渲染列表 */
.message.bot ul,
.message.bot ol {
  padding-left: 1.2em;
}

/* 美化代码块 */
.message.bot pre {
  background: #272822;
  color: #f8f8f2;
  padding: 8px;
  overflow-x: auto;
  border-radius: 4px;
}

.input-row {
    display: flex;
    justify-content: center;
    width: 90%;
    gap: 12px;
}

#userInput {
    flex: 1;
    padding: 12px 16px;
    font-size: 16px;
    border: none;
    border-radius: 13px;
    backdrop-filter: blur(var(--card_filter));
    -webkit-backdrop-filter: blur(var(--card_filter));
    background: var(--item_bg_color);
    border: 1px solid rgba(255, 255, 255, 0.12);
    background-clip: padding-box;
    color: var(--main_text_color);
    transition: all 0.3s ease;
}

#userInput:focus {
    outline: none;
    background: var(--item_hover_color);
    transform: translateY(-2px);
}

html[data-theme="Dark"] .chat-box {
    border: 1px solid rgba(255, 255, 255, 0.08);
}

html[data-theme="Dark"] .message.user {
    background: rgba(255, 255, 255, 0.20);
    border: 1px solid rgba(255, 255, 255, 0.10);
}

html[data-theme="Dark"] .message.bot {
    background: rgba(255, 255, 255, 0.10);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

html[data-theme="Dark"] #userInput {
    border: 1px solid rgba(255, 255, 255, 0.08);
}

button {
    padding: 12px 20px;
    font-size: 16px;
    border: none;
    border-radius: 13px;
    backdrop-filter: blur(var(--card_filter));
    -webkit-backdrop-filter: blur(var(--card_filter));
    background: var(--item_bg_color);
    color: var(--main_text_color);
    cursor: pointer;
    transition: all 0.3s ease;
}

button:hover {
    background: var(--item_hover_color);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px -4px rgba(0, 0, 0, 0.1);
}

.typing {
    color: var(--purple_text_color);
    font-style: italic;
    animation: blink 1.8s infinite;
}

@keyframes blink {
    50% {
      opacity: 0.3;
    }
}

@keyframes slideUp {
    from {
        transform: translateY(100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes slideDown {
    from {
        transform: translateY(0);
        opacity: 1;
    }
    to {
        transform: translateY(100%);
        opacity: 0;
    }
}