.tool-container {
    padding: 30px;
    max-width: 900px;
    margin: 30px auto;
    background: #ffffff;
}
.tool-container h3 {
    font-size: 22px;
    color: #1f2937;
    text-align: center;
    margin-bottom: 28px;
    font-weight: 600;
    letter-spacing: 1px;
}
.form-item {
    margin-bottom: 20px;
}
label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 14px;
    color: #4b5563;
}
input, select {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    box-sizing: border-box;
    font-size: 14px;
    transition: all 0.25s ease;
    background: #f9fafb;
}
input:focus, select:focus {
    outline: none;
    border-color: #2d8cf0;
    background: #fff;
    box-shadow: 0 0 0 3px rgba(45,140,240,0.15);
}
textarea {
    width: 100%;
    padding: 14px;
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    resize: none;
    box-sizing: border-box;
    font-size: 14px;
    line-height: 1.7;
    background: #f9fafb;
    transition: all 0.25s ease;
}
textarea:focus {
    outline: none;
    border-color: #2d8cf0;
    background: #fff;
    box-shadow: 0 0 0 3px rgba(45,140,240,0.15);
}
.btn {
    padding: 11px 22px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    margin-right: 12px;
    margin-bottom: 10px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.25s ease;
}
.btn-gen {
    background: #2d8cf0;
    color: #fff;
}
.btn-gen:hover {
    background: #2478d8;
}
.btn-copy {
    background: #67c23a;
    color: #fff;
}
.btn-copy:hover {
    background: #58ad31;
}
.btn-clear {
    background: #f56c6c;
    color: #fff;
}
.btn-clear:hover {
    background: #e05555;
}
.flex-row {
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
}
.flex-row .form-item {
    flex: 1;
    min-width: 160px;
}
.tip-text {
    font-size: 13px;
    color: #6b7280;
    margin: 12px 0;
    line-height: 1.8;
    padding: 12px 16px;
    background: #f0f7ff;
    border-radius: 10px;
}
.count-show {
    margin: 12px 0;
    color: #374151;
    font-size: 14px;
    font-weight: 500;
}