/* 无障碍访问样式 */
.skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--accent-primary);
    color: white;
    padding: 0.75rem 1.5rem;
    z-index: 9999;
    transition: top 0.3s;
    font-weight: 600;
    text-decoration: none;
    border-radius: 0 0 var(--radius-md) 0;
}

.skip-link:focus {
    top: 0;
    outline: 3px solid var(--accent-secondary);
    outline-offset: 2px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.keyboard-nav *:focus {
    outline: 2px solid var(--accent-primary) !important;
    outline-offset: 2px !important;
}

.keyboard-nav button:focus,
.keyboard-nav a:focus,
.keyboard-nav input:focus,
.keyboard-nav select:focus,
.keyboard-nav textarea:focus {
    outline: 3px solid var(--accent-primary) !important;
    outline-offset: 3px !important;
    box-shadow: 0 0 0 6px rgba(192, 57, 43, 0.2) !important;
}

body.keyboard-nav .first-focus:focus {
    outline: 3px solid var(--accent-primary) !important;
    outline-offset: -3px !important;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .particle {
        animation: none !important;
    }

    .mouse-glow {
        transition: none !important;
    }

    .progress-bar {
        transition: none !important;
    }

    .ripple {
        animation: none !important;
    }

    .feature-card,
    .glass-card,
    .product-card {
        transition: none !important;
        transform: none !important;
    }
}

@media (forced-colors: active) {
    .glass,
    .glass-card {
        border: 2px solid ButtonText;
    }

    .btn-primary,
    .btn-secondary {
        border: 2px solid ButtonText;
    }
}

/* 表单验证样式 */
input.invalid,
textarea.invalid,
select.invalid {
    border-color: var(--error-color, #e74c3c) !important;
    background: rgba(231, 76, 60, 0.05) !important;
}

input.valid,
textarea.valid,
select.valid {
    border-color: var(--success-color, #27ae60) !important;
    background: rgba(39, 174, 96, 0.05) !important;
}

.field-error {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: var(--error-color, #e74c3c);
    line-height: 1.4;
}

.char-counter {
    display: block;
    text-align: right;
    font-size: 0.75rem;
    margin-top: 0.25rem;
    color: var(--text-tertiary);
}

.form-success {
    border-radius: var(--radius-md);
    padding: 1rem;
    margin-top: 1rem;
    animation: slideIn 0.3s ease;
}

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

input[type="text"],
input[type="email"],
input[type="tel"],
textarea,
select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-light);
    border-radius: var(--radius-md);
    background: var(--glass-bg);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(192, 57, 43, 0.1);
}

input::placeholder,
textarea::placeholder {
    color: var(--text-tertiary);
    opacity: 0.7;
}

/* 图片懒加载样式 */
.lazy-image {
    opacity: 0;
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.lazy-loaded {
    opacity: 1;
}

/* 骨架屏动画 */
@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

.skeleton {
    animation: shimmer 2s infinite;
    background: linear-gradient(
        to right,
        var(--bg-secondary) 4%,
        var(--glass-bg) 25%,
        var(--bg-secondary) 36%
    );
    background-size: 1000px 100%;
}