/* 百度网盘充值系统 - 登录/注册页 (美化版) */

.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 40%, #0f172a 100%);
    position: relative;
    overflow: hidden;
}

/* 背景装饰 */
.auth-page::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(13, 148, 136, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 8s ease-in-out infinite;
}

.auth-page::after {
    content: '';
    position: absolute;
    bottom: -20%;
    left: -15%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(6, 182, 212, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite reverse;
}

/* 浮动网格背景 */
.auth-bg-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
}

.auth-box {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(24px);
    border-radius: var(--radius-xl);
    padding: 48px 40px;
    width: 420px;
    max-width: 92vw;
    box-shadow: var(--shadow-xl), 0 0 80px rgba(13, 148, 136, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    z-index: 1;
    animation: scaleIn 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.auth-box h1, .auth-box h2 {
    text-align: center;
    margin-bottom: 6px;
    font-size: 26px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.auth-box .subtitle {
    text-align: center;
    color: var(--text-light);
    margin-bottom: 32px;
    font-size: 14px;
    font-weight: 400;
}

.auth-box .switch-link {
    text-align: center;
    margin-top: 20px;
    font-size: 14px;
    color: var(--text-light);
}

.auth-box .switch-link a {
    color: var(--primary);
    cursor: pointer;
    text-decoration: none;
    font-weight: 600;
    transition: color var(--transition-fast);
}

.auth-box .switch-link a:hover {
    color: var(--primary-dark);
}

.get-invite-link {
    float: right;
    font-size: 12px;
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    padding: 2px 8px;
    border-radius: var(--radius-full);
}

.get-invite-link:hover {
    background: var(--primary-light);
}

/* 邀请码帮助弹窗 */
.invite-help-dialog {
    position: relative;
    background: var(--card);
    border-radius: var(--radius-xl);
    width: 380px;
    max-width: 90vw;
    padding: 32px 28px;
    box-shadow: var(--shadow-xl);
    animation: modalSlideIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    border: 1px solid var(--border-light);
}

/* 表单内按钮样式增强 */
.auth-box .btn-primary.btn-block {
    padding: 13px 24px;
    font-size: 15px;
    margin-top: 8px;
}