/* ============================================
   响应式设计增强
   ============================================ */

@media (max-width: 1200px) {
    .main-container {
        max-width: 100%;
    }

    .form-section {
        padding: 1.5rem;
    }
}

@media (max-width: 768px) {
    body {
        font-size: 14px;
    }

    .navbar-container {
        padding: 0.75rem;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background: rgba(15, 23, 42, 0.95);
        flex-direction: column;
        padding: 1rem;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-menu li {
        padding: 0.5rem 0;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-menu li:last-child {
        border-bottom: none;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(10px, 10px);
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    .content-inner {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .result-container {
        min-height: 350px;
    }

    .form-section,
    .result-container {
        border-radius: 0.5rem;
        padding: 1rem;
    }

    .form-group {
        gap: 0.5rem;
    }

    .form-group label {
        font-size: 0.9rem;
    }

    .form-group input,
    .form-group textarea,
    .form-group select {
        padding: 0.75rem;
        font-size: 16px;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .btn {
        padding: 0.75rem 1.25rem;
        font-size: 0.9rem;
    }

    .btn-large {
        padding: 1rem 1.5rem;
        font-size: 0.95rem;
    }

    .tabs-container {
        gap: 0.5rem;
        margin-bottom: 1.5rem;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: thin;
        scrollbar-color: var(--border-color) transparent;
    }

    .tabs-container::-webkit-scrollbar {
        height: 4px;
    }

    .tabs-container::-webkit-scrollbar-track {
        background: transparent;
    }

    .tabs-container::-webkit-scrollbar-thumb {
        background: var(--border-color);
        border-radius: 2px;
    }

    .tab-btn {
        padding: 0.75rem;
        font-size: 0.85rem;
        flex-shrink: 0;
    }

    .tab-icon {
        width: 1rem;
        height: 1rem;
    }

    .models-list {
        gap: 0.5rem;
    }

    .models-list li {
        padding: 0.75rem;
        font-size: 0.9rem;
    }

    .images-preview {
        grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
        gap: 0.75rem;
    }

    .notification {
        max-width: calc(100% - 1rem);
        right: 0.5rem;
        bottom: 0.5rem;
    }

    .main-container {
        padding: 1rem;
    }

    .form-section h2 {
        font-size: 1.5rem;
    }

    .subtitle {
        font-size: 0.9rem;
        margin-bottom: 1rem;
    }
}

@media (max-width: 480px) {
    .navbar-container {
        padding: 0.5rem;
    }

    .logo {
        gap: 0.5rem;
        font-size: 1.25rem;
    }

    .logo-icon {
        width: 1.5rem;
        height: 1.5rem;
    }

    .main-container {
        padding: 0.75rem;
    }

    .form-section {
        padding: 0.75rem;
    }

    .content-inner {
        gap: 1rem;
    }

    .result-container {
        min-height: 300px;
        padding: 1rem;
    }

    .form-group {
        gap: 0.4rem;
    }

    .form-group label {
        font-size: 0.85rem;
        font-weight: 700;
    }

    .form-group input,
    .form-group textarea,
    .form-group select {
        padding: 0.65rem;
        font-size: 16px;
        border-radius: 0.375rem;
    }

    .form-group textarea {
        min-height: 80px;
    }

    .form-row {
        gap: 0.75rem;
    }

    .btn {
        padding: 0.65rem 1rem;
        font-size: 0.85rem;
    }

    .btn-large {
        padding: 0.85rem 1rem;
        font-size: 0.9rem;
    }

    .tab-btn {
        padding: 0.65rem 0.5rem;
        font-size: 0.75rem;
        gap: 0.35rem;
    }

    .tab-icon {
        width: 0.9rem;
        height: 0.9rem;
    }

    .placeholder svg {
        width: 50px;
        height: 50px;
    }

    .placeholder p {
        font-size: 0.9rem;
    }

    .images-preview {
        grid-template-columns: repeat(auto-fill, minmax(50px, 1fr));
        gap: 0.5rem;
    }

    .image-preview-remove {
        width: 20px;
        height: 20px;
        font-size: 14px;
    }

    .button-group {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }

    .models-list li {
        padding: 0.65rem;
        font-size: 0.85rem;
    }

    .models-info {
        padding: 0.75rem;
        margin-top: 1.5rem;
    }

    .models-info h3 {
        margin-bottom: 0.75rem;
        font-size: 1rem;
    }

    .footer {
        padding: 1rem;
    }

    .footer-content {
        font-size: 0.8rem;
    }

    .notification {
        max-width: calc(100% - 0.5rem);
        right: 0.25rem;
        bottom: 0.25rem;
        padding: 0.75rem;
        font-size: 0.85rem;
    }

    .char-count {
        font-size: 0.8rem;
    }

    .slider-value {
        font-size: 0.85rem;
    }

    .file-upload-area {
        padding: 1.5rem;
    }

    .upload-icon {
        width: 40px;
        height: 40px;
    }

    .file-upload-content h3 {
        font-size: 1rem;
        margin-bottom: 0.5rem;
    }

    .file-upload-content p {
        font-size: 0.8rem;
    }
}

/* 超小屏幕 */
@media (max-width: 360px) {
    .logo {
        font-size: 1rem;
    }

    .logo-icon {
        width: 1.25rem;
        height: 1.25rem;
    }

    .form-section h2 {
        font-size: 1.25rem;
    }

    .tab-btn {
        padding: 0.5rem 0.35rem;
        font-size: 0.7rem;
    }

    .btn {
        padding: 0.6rem 0.8rem;
        font-size: 0.8rem;
    }

    .form-group input,
    .form-group textarea,
    .form-group select {
        padding: 0.6rem;
    }
}

/* 横屏模式 */
@media (max-height: 600px) {
    .form-section,
    .result-container {
        min-height: auto;
    }

    .form-group textarea {
        min-height: 60px;
    }

    .result-container {
        min-height: 250px;
    }
}

/* 打印样式 */
@media print {
    .navbar,
    .footer,
    .hamburger,
    .notification,
    .btn {
        display: none;
    }

    .main-container {
        padding: 0;
    }

    .form-section,
    .result-container {
        page-break-inside: avoid;
    }
}

/* 深色模式优化（已默认为深色主题） */
@media (prefers-color-scheme: dark) {
    /* 已在 :root 变量中处理 */
}

/* 高对比度模式 */
@media (prefers-contrast: more) {
    :root {
        --border-color: #64748b;
        --text-secondary: #e2e8f0;
    }

    .btn-secondary {
        border-width: 2px;
    }

    .file-upload-area {
        border-width: 3px;
    }
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* 屏幕阅读器和辅助技术 */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}