body {
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 100vh;
            padding: 20px;
        }

        .auth-container {
            width: 520px;
            max-width: 100%;
            text-align: center;
        }

        .auth-logo {
            margin-bottom: 32px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--text-primary);
            text-decoration: none;
            opacity: 0;
            animation: fadeUp 0.6s var(--ease-apple) forwards;
        }

        .auth-card {
            text-align: left;
            opacity: 0;
            animation: fadeUp 0.6s var(--ease-apple) 0.1s forwards;
            background: var(--bg-card);
            padding: 40px;
            border-radius: 24px;
            box-shadow: var(--shadow-sm);
        }

        .auth-title {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .auth-subtitle {
            color: var(--text-secondary);
            margin-bottom: 32px;
            font-size: 0.95rem;
        }

        .error-msg {
            color: var(--danger);
            font-size: 0.85rem;
            margin-bottom: 16px;
            display: none;
            padding: 10px;
            background: rgba(255, 59, 48, 0.1);
            border-radius: var(--radius-sm);
        }

        .switch-mode {
            margin-top: 24px;
            text-align: center;
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        .switch-mode a {
            color: var(--accent);
            text-decoration: none;
            font-weight: 500;
            cursor: pointer;
        }

/* ===== 滑块验证码（go-captcha slide）===== */
.slide-captcha { margin: 6px 0 2px; }
.slide-captcha-imgbox { position: relative; border-radius: 8px; overflow: hidden; background: var(--bg-input); }
.slide-captcha-refresh {
    position: absolute; top: 6px; right: 6px; width: 30px; height: 30px;
    border: none; border-radius: 8px; cursor: pointer; font-size: 16px; line-height: 1;
    background: rgba(0,0,0,.45); color: #fff; display: flex; align-items: center; justify-content: center;
    transition: background .2s;
}
.slide-captcha-refresh:hover { background: rgba(0,0,0,.65); }
.slide-captcha-track {
    height: 44px; margin-top: 12px; border-radius: 12px;
    background: var(--bg-input, #f0f1f3); display: flex; align-items: center; justify-content: center;
    overflow: hidden;
}
.slide-captcha-tip { color: var(--text-tertiary, #98989f); font-size: .85rem; pointer-events: none; user-select: none; }
.slide-captcha-thumb {
    position: absolute; top: 0; height: 44px;
    display: flex; align-items: center; justify-content: center;
    background: #fff; color: var(--text-secondary, #555); border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,.15); cursor: grab; touch-action: none; user-select: none;
    font-size: 14px; font-weight: 700; transition: background .15s, color .15s;
}
.slide-captcha-thumb:active { cursor: grabbing; }
.slide-captcha-thumb.done { background: var(--accent, #34c759); color: #fff; box-shadow: 0 2px 10px rgba(52,199,89,.4); }

/* #app-root 改为 flex 列后,本页卡片仍居中 */
#app-root { justify-content: center; align-items: center; }