* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Georgia', 'Noto Serif SC', 'Songti SC', serif;
    background-color: #F5F1EB; color: #4a3728; line-height: 1.6;
    min-height: 100vh; display: flex; flex-direction: column;
}

.navbar { position: fixed; top: 0; left: 0; width: 100%; background-color: #A87868; z-index: 1000; box-shadow: 0 2px 12px rgba(0,0,0,0.15); }
.nav-container { max-width: 1200px; margin: 0 auto; padding: 0 30px; display: flex; justify-content: space-between; align-items: center; height: 64px; }
.nav-logo {
    display: flex;
    align-items: center;
    gap: -5px;  /* 图片和文字的间距 */
    margin-left: -160px;  /* 负值往左移，自己调数值 */
    font-size: 1.5em;
    font-weight: bold;
    color: #F5F1EB;
    text-decoration: none;
    letter-spacing: 3px;
    font-family: 'Georgia', serif;
}

.logo-img {
    height: 80px;   /* 图片高度，跟导航栏协调 */
    width: auto;
    object-fit: contain;
}
.nav-links { list-style: none; display: flex; gap: 8px; }
.nav-links a { color: #F5F1EB; text-decoration: none; padding: 8px 18px; border-radius: 20px; font-size: 0.95em; transition: all 0.3s ease; letter-spacing: 1px; 
}
.nav-links a:hover, .nav-links a.active { background-color: rgba(245,241,235,0.2); color: #fff; }

.chat-container { display: flex; flex-direction: column; height: calc(100vh - 64px); margin-top: 64px; max-width: 800px; width: 100%; margin-left: auto; margin-right: auto;  
    background: url('./picture/chatbg1.jpg') center/contain no-repeat fixed;}

.chat-header { display: flex; align-items: center; padding: 16px 24px; background: #fff; border-bottom: 2px solid #CAA59B; gap: 14px; }
.back-btn { display: inline-flex; align-items: center; color: #A87868; text-decoration: none; font-size: 0.9em; letter-spacing: 1px; transition: color 0.3s; white-space: nowrap; }
.back-btn:hover { color: #B15736; }
.chat-avatar { width: 48px; height: 48px; border-radius: 50%; background: linear-gradient(135deg, #e8ddd4, #d4c5b8); border: 2px solid #CAA59B; display: flex; justify-content: center; align-items: center; font-size: 1.3em; color: #A87868; flex-shrink: 0; }
.chat-header-info .chat-name { font-size: 1.15em; font-weight: 700; color: #4a3728; letter-spacing: 2px; }
.chat-header-info .chat-desc { font-size: 0.8em; color: #8b7265; letter-spacing: 0.5px; }

.chat-messages { flex: 1; overflow-y: auto; padding: 24px; display: flex; flex-direction: column; gap: 20px; }

.message { display: flex; gap: 12px; max-width: 80%; animation: fadeIn 0.4s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.message.bot { align-self: flex-start; }
.message.user { align-self: flex-end; flex-direction: row-reverse; }

.msg-avatar { width: 40px; height: 40px; border-radius: 50%; background: linear-gradient(135deg, #e8ddd4, #d4c5b8); border: 2px solid #CAA59B; display: flex; justify-content: center; align-items: center; font-size: 1em; color: #A87868; flex-shrink: 0; }
.message.user .msg-avatar { background: #2C8079; border-color: #2C8079; color: #F5F1EB; font-size: 0.8em; }

.msg-bubble { padding: 14px 18px; border-radius: 16px; font-size: 0.95em; line-height: 1.8; letter-spacing: 0.3px; position: relative; }
.message.bot .msg-bubble { background: #fff; border: 1px solid #e8ddd4; border-top-left-radius: 4px; color: #4a3728; }
.message.user .msg-bubble { background: #A87868; color: #F5F1EB; border-top-right-radius: 4px; }

.msg-time { font-size: 0.72em; color: #b09a8e; margin-top: 6px; text-align: right; }
.message.bot .msg-time { text-align: left; }

.system-msg { text-align: center; font-size: 0.82em; color: #8b7265; padding: 8px 16px; background: rgba(202,165,155,0.15); border-radius: 20px; align-self: center; letter-spacing: 1px; }

.quick-questions { display: flex; flex-wrap: wrap; gap: 8px; padding: 0 24px 12px; }
.quick-btn { padding: 8px 16px; background: #fff; border: 1px solid #CAA59B; border-radius: 20px; font-size: 0.82em; color: #6b5348; cursor: pointer; transition: all 0.3s ease; font-family: 'Georgia', 'Noto Serif SC', serif; }
.quick-btn:hover { background: #A87868; color: #F5F1EB; border-color: #A87868; }

.chat-input-area { display: flex; gap: 12px; padding: 16px 24px; background: #fff; border-top: 2px solid #CAA59B; align-items: center; }
.chat-input { flex: 1; padding: 12px 20px; border: 2px solid #CAA59B; border-radius: 25px; font-size: 0.95em; background: #F5F1EB; color: #4a3728; font-family: 'Georgia', 'Noto Serif SC', serif; transition: all 0.3s ease; }
.chat-input:focus { outline: none; border-color: #A87868; box-shadow: 0 0 0 3px rgba(168,120,104,0.15); }
.chat-input::placeholder { color: #b09a8e; }
.send-btn { width: 46px; height: 46px; border-radius: 50%; background: #A87868; border: none; cursor: pointer; display: flex; justify-content: center; align-items: center; transition: all 0.3s ease; flex-shrink: 0; }
.send-btn:hover { background: #B15736; transform: scale(1.05); }
.send-btn svg { width: 20px; height: 20px; fill: #F5F1EB; }

.typing-indicator { display: none; align-self: flex-start; padding: 14px 18px; background: #fff; border: 1px solid #e8ddd4; border-radius: 16px; border-top-left-radius: 4px; margin-left: 52px; }
.typing-indicator.show { display: flex; gap: 5px; align-items: center; }
.typing-dot { width: 8px; height: 8px; background: #CAA59B; border-radius: 50%; animation: typingBounce 1.4s infinite ease-in-out; }
.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }
@keyframes typingBounce { 0%, 80%, 100% { transform: scale(0.7); opacity: 0.5; } 40% { transform: scale(1); opacity: 1; } }

@media (max-width: 700px) {
    .chat-container { max-width: 100%; }
    .chat-header { padding: 12px 16px; }
    .chat-messages { padding: 16px; }
    .message { max-width: 88%; }
    .chat-input-area { padding: 12px 16px; }
    .quick-questions { padding: 0 16px 10px; }
    .nav-links a { padding: 6px 10px; font-size: 0.82em; }
}