body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: #E7DDFF; /* 浅米色背景 */
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    width: 100%;
    display: flex;
    justify-content: center;
}

.login-card {
    background-color: white;
    width: 340px;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    text-align: center;
}

h2 {
    color: #333;
    font-size: 20px;
    margin-top: 0;
    margin-bottom: 25px;
    font-weight: 700;
}

.input-group {
    margin-bottom: 20px;
}

.password-input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #EAEAEA;
    border-radius: 6px;
    font-size: 14px;
    box-sizing: border-box; /* 确保padding不撑大宽度 */
    outline: none;
    color: #666;
}

.password-input::placeholder {
    color: #999;
}

.submit-btn {
    width: 100%;
    background-color: #7EC0EE; /* 浅蓝色 */
    color: white;
    border: none;
    padding: 12px;
    border-radius: 25px; /* 胶囊形状 */
    font-size: 14px;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.2s;
    margin-bottom: 15px;
}

.submit-btn:hover {
    background-color: #6CAFE0;
}

.tutorial-link {
    display: block;
    color: #5AA9E6;
    text-decoration: none;
    font-size: 14px;
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

.section-title {
    font-size: 14px;
    color: #333;
    font-weight: bold;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

.resource-btn {
    display: block;
    width: 100%;
    background-color: #CD81D1; /* 紫色 */
    background: linear-gradient(to right, #CF7ED3, #D696D9); /* 简单的紫色渐变 */
    color: white;
    border: none;
    padding: 12px;
    border-radius: 6px;
    font-size: 14px;
    margin-bottom: 10px;
    cursor: pointer;
    transition: opacity 0.2s;
}

.resource-btn:hover {
    opacity: 0.9;
}

.resource-btn:last-child {
    margin-bottom: 0;
}