:root {
    --primary: #FF914E;      /* 主橙色背景色 */
    --secondary: #E67E22;    /* 深橙色 */
    --accent: #FFD700;       /* 金黄色强调色 */
    --light: #FFF3E0;        /* 浅橙色背景 */
    --dark: #FFFFFF;         /* 白色文本 */
    --success: #4CAF50;      /* 绿色 */
    --danger: #FF6B6B;       /* 亮红色 */
    --gray: #FFCCBC;         /* 浅橙色 */
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
}

body {
    background-color: var(--primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px;
    color: var(--dark);
}

.brand-header {
    text-align: center;
    margin-bottom: 25px;
    padding: 20px;
    width: 100%;
}

.brand-name {
    font-size: 36px;
    font-weight: 700;
    color: white;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    letter-spacing: 2px;
    margin-bottom: 10px;
}

.brand-subtitle {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 300;
}

.reg-jazz-box {
    width: 100%;
    max-width: 450px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(15px);
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.title-jazz {
    background: linear-gradient(135deg, rgba(255, 145, 78, 0.7), rgba(230, 126, 34, 0.7));
    color: white;
    padding: 30px 20px;
    text-align: center;
}

.title-jazz h2 {
    font-size: 24px;
    margin-bottom: 10px;
}

.title-jazz p {
    opacity: 0.9;
    font-size: 14px;
}

form {
    padding: 20px;
}

.form-jazz-group {
    margin-bottom: 15px;
}

.form-jazz-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--dark);
}

.form-jazz-control {
    width: 100%;
    padding: 14px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.15);
    color: var(--dark);
}

.form-jazz-control:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(255, 215, 0, 0.3);
    outline: none;
    background: rgba(255, 255, 255, 0.25);
}

.input-jazz-group {
    display: flex;
    gap: 10px;
}

.input-jazz-group .form-jazz-control {
    flex: 1;
}

.btn {
    display: inline-block;
    padding: 14px 20px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(255, 145, 78, 0.4);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger), #FF5252);
    color: white;
}

.btn-danger:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(255, 107, 107, 0.4);
}

.btn-outline {
    background: transparent;
    border: 2px solid rgba(255, 255, 255, 0.5);
    color: var(--dark);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
}

.btn-sm {
    padding: 10px 15px;
    font-size: 14px;
    width: auto;
    min-width: 120px;
}

.btn-disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-full-width {
    display: block;
    width: 100%;
}

.status-message {
    text-align: center;
    padding: 15px;
    border-radius: 8px;
    margin-top: 20px;
    display: none;
}

.status-success {
    background-color: rgba(76, 175, 80, 0.2);
    color: var(--success);
    border: 1px solid var(--success);
}

.status-error {
    background-color: rgba(255, 82, 82, 0.2);
    color: var(--danger);
    border: 1px solid var(--danger);
}

.reg-jazz-text {
    margin-top: 20px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    text-align: center;
}

.reg-jazz-text a {
    color: var(--accent);
    text-decoration: none;
}

.reg-jazz-text a:hover {
    text-decoration: underline;
}

.confirmation {
    background-color: rgba(255, 215, 0, 0.2);
    border: 1px solid var(--accent);
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 20px;
    display: none;
}

.confirmation p {
    margin-bottom: 15px;
    color: var(--dark);
}

.confirmation-buttons {
    display: flex;
    gap: 10px;
}

.confirmation-buttons .btn {
    flex: 1;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 768px) {
    .input-jazz-group {
        flex-direction: column;
    }

    .confirmation-buttons {
        flex-direction: column;
    }

    .btn-sm {
        width: 100%;
        margin-top: 10px;
    }

    .brand-name {
        font-size: 28px;
    }
}