* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft Yahei", sans-serif;
}

.message-container {
    width: 100%;
    max-width: 900px;
    color: #fff;
    padding: 2rem;
}

.message-title {
    margin-bottom: 3rem;
}

.message-title h2 {
    font-size: 2.2rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.message-title p {
    color: #999;
    font-size: 1.1rem;
}

.message-form .form-row {
    display: flex;
    justify-content: space-between;
    gap: 2rem;
    margin-bottom: 1.5rem;
}

.message-form .form-group {
    flex: 1;
    position: relative;
}

.message-form .form-group.full-width {
    flex: 1 1 100%;
}

.message-form input,
.message-form textarea {
    width: 100%;
    background: transparent;
    border: none;
    border-bottom: 1px solid #666;
    color: #fff;
    padding: 0.8rem 0;
    font-size: 1rem;
    outline: none;
    resize: none;
}

.message-form input::placeholder,
.message-form textarea::placeholder {
    color: #999;
}

.message-form input:focus,
.message-form textarea:focus {
    border-bottom-color: #005197;
}

.message-form textarea {
    min-height: 120px;
}

.submit-btn {
    width: 100%;
    background: #005197;
    color: #fff;
    border: none;
    padding: 1rem;
    font-size: 1.1rem;
    cursor: pointer;
    margin-top: 1.5rem;
    transition: background 0.3s ease;
}

.submit-btn:hover {
    background: #0056b3;
}