body {
    font-family: "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    background-color: #f5f5f5;
}
.search-form {
    display: flex;
    height: 44px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.search-input {
    flex: 1;
    border: 1px solid #ff4400;
    border-right: none;
    outline: none;
    font-size: 14px;
    border-radius: 4px 0 0 4px;
    box-sizing: border-box;
}
.search-btn {
    min-width: 80px;
    background-color: #ff4400;
    color: white;
    border: none;
    font-size: 16px;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
    transition: background-color 0.2s;
}
.search-btn:hover {
    background-color: #f53f00;
}
.search-tip {
    font-size: 12px;
    color: #666;
}
.category-title {
    font-size: 18px;
    color: #333;
    font-weight: 600;
    border-left: 3px solid #ff4400;
}
.keyword-buttons {
    display: flex;
    flex-wrap: wrap;
}
.keyword-btn {
    background-color: #fff;
    border: 1px solid #ff4400;
    color: #ff4400;
    border-radius: 20px;
    text-decoration: none;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
}
.keyword-btn:hover {
    background-color: #ff4400;
    color: #fff;
}