/* 统一认证页面样式 — 适用于登录 & 修改密码 */
body {
    background: var(--bg-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0;
    padding: 20px;
    position: relative;
    overflow: hidden;
}
body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(var(--border-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--border-color) 1px, transparent 1px);
    background-size: 30px 30px;
    opacity: 0.08;
    pointer-events: none;
}

/* 卡片容器统一宽度 */
.login-container,
.container {
    max-width: 440px;
    width: 100%;
    background: var(--bg-secondary);
    border-radius: 24px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.2), 0 0 0 1px var(--border-color);
    backdrop-filter: blur(4px);
    position: relative;
    z-index: 1;
}

/* 头部区域 */
.login-header,
.header {
    text-align: center;
    padding: 32px 32px 0 32px;
}

/* logo 统一尺寸 (放大1.5倍) */
.logo-icon {
    width: 108px;
    height: 108px;
    border-radius: 28px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    box-shadow: 0 12px 28px rgba(0,0,0,0.25);
}
.logo-icon img {
    width: 72px;
    height: 72px;
    object-fit: contain;
    display: block;
}

/* 标题统一 */
.login-title,
h2 {
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-primary), var(--text-accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 8px;
}
.login-subtitle,
.subtitle {
    font-size: 13px;
    color: var(--text-tertiary);
    letter-spacing: 1px;
}

/* 主体内容 */
.login-body,
.form-content {
    padding: 32px;
}

/* 表单组 */
.form-group {
    margin-bottom: 24px;
}
.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
}
.form-group input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    font-size: 16px;   /* 防止iOS缩放 */
    color: var(--text-primary);
    transition: all 0.2s;
    box-sizing: border-box;
}
.form-group input:focus {
    outline: none;
    border-color: var(--text-accent);
    box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
}
.form-group input:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

/* 复选框 */
.checkbox-group {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 24px;
}
.checkbox-group input {
    width: auto;
    margin: 0;
}
.checkbox-group label {
    margin: 0;
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
}

/* 按钮统一 */
.login-btn,
.btn {
    width: 100%;
    padding: 12px;
    background: var(--text-accent);
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-white);
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 8px;
    position: relative;
    overflow: hidden;
}
.login-btn::after,
.btn::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}
.login-btn:hover::after,
.btn:hover::after {
    left: 100%;
}
.login-btn:hover,
.btn:hover {
    transform: translateY(-1px);
    filter: brightness(1.05);
}

/* 错误 & 成功提示统一 */
.error-msg,
.error {
    background: rgba(244,67,54,0.1);
    border-left: 3px solid #F44336;
    padding: 12px;
    border-radius: 12px;
    margin-bottom: 20px;
    font-size: 13px;
    color: #F44336;
}
.success {
    background: rgba(76,175,80,0.1);
    border-left: 3px solid #4CAF50;
    padding: 12px;
    border-radius: 12px;
    margin-bottom: 20px;
    font-size: 13px;
    color: #4CAF50;
}

/* 安全说明（登录页） */
.security-note {
    margin-top: 20px;
    text-align: center;
    font-size: 11px;
    color: var(--text-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

/* 返回链接（修改密码页） */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--bg-tertiary);
    border-radius: 40px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13px;
    transition: all 0.2s;
}
.back-link:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* 移动端适配 */
@media (max-width: 480px) {
    .login-header,
    .header {
        padding: 24px 24px 0 24px;
    }
    .login-body,
    .form-content {
        padding: 24px;
    }
    .login-title,
    h2 {
        font-size: 24px;
    }
    .logo-icon {
        width: 90px;
        height: 90px;
        border-radius: 24px;
        margin-bottom: 20px;
    }
    .logo-icon img {
        width: 60px;
        height: 60px;
    }
}