/* ============================================================================
   辅助页面系列移动端专项优化
   适用于：Downloads, Partner, EcoCooperation, SmartCampus等
   ============================================================================ */

/* 超小屏优化（< 640px）*/
@media (max-width: 639px) {
    /* Downloads页面 - 头部 */
    .download-hero {
        padding: 70px 0 50px;
    }

    .download-hero h1 {
        font-size: clamp(1.75rem, 5vw, 2.5rem);
        line-height: 1.2;
    }

    .download-hero .tagline {
        font-size: 1.1rem;
        margin-bottom: 1rem;
    }

    .download-hero .description {
        font-size: 0.95rem;
        line-height: 1.6;
        margin: 0 auto 1.5rem;
        padding: 0 1rem;
    }

    /* 平台标签 */
    .download-platforms {
        gap: 0.5rem;
        margin-top: 1.5rem;
        flex-wrap: wrap;
    }

    .platform-tag {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
    }

    /* 下载方式网格 */
    .download-methods {
        padding: 40px 0;
    }

    .methods-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        padding: 0 1rem;
    }

    .download-method-card {
        padding: 2rem 1.5rem;
        border-radius: 16px;
    }

    .method-icon {
        width: 60px;
        height: 60px;
        margin-bottom: 1rem;
    }

    .method-icon svg {
        width: 30px;
        height: 30px;
    }

    .download-method-card h3 {
        font-size: 1.2rem;
        margin-bottom: 0.75rem;
    }

    .download-method-card p {
        font-size: 0.9rem;
        line-height: 1.5;
        margin-bottom: 1.5rem;
    }

    /* 二维码 */
    .qr-code-wrapper {
        padding: 1rem;
        margin-bottom: 1rem;
    }

    .qr-code-wrapper img {
        width: 140px;
        height: 140px;
    }

    .qr-label {
        font-size: 0.8rem;
    }

    /* Partner页面 - 头部 */
    .partner-hero {
        padding: 80px 0 60px;
    }

    .partner-hero-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 0 1rem;
    }

    .hero-text h1 {
        font-size: clamp(1.75rem, 5vw, 2.5rem);
        line-height: 1.2;
        margin-bottom: 1rem;
    }

    .hero-text .subtitle {
        font-size: 0.95rem;
        line-height: 1.5;
        margin-bottom: 1.5rem;
    }

    .hero-text .highlight {
        font-size: 1.2rem;
        margin-bottom: 1.5rem;
    }

    /* 粒子动画 */
    .particles-bg {
        display: none;
    }

    /* 合作伙伴表单 */
    .partner-form {
        padding: 1.25rem;
        margin-top: 1.5rem;
    }

    .form-title {
        font-size: 1.1rem;
        margin-bottom: 1rem;
    }

    .form-group {
        margin-bottom: 0.75rem;
    }

    .form-input {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }

    .form-input::placeholder {
        font-size: 0.8rem;
    }

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

    /* 市场机遇网格 */
    .market-opportunity {
        padding: 40px 0;
    }

    .opportunity-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
        padding: 0 1rem;
    }

    .opportunity-card {
        padding: 1.25rem;
    }

    .opportunity-card h3 {
        font-size: 1.1rem;
        margin-bottom: 0.5rem;
    }

    .opportunity-card p {
        font-size: 0.9rem;
        line-height: 1.5;
    }

    /* 面包屑 */
    .breadcrumb-section {
        padding: 0.75rem 0;
    }

    .breadcrumb {
        font-size: 0.85rem;
        padding: 0 1rem;
    }

    /* 下载按钮 */
    .download-button {
        width: 100%;
        padding: 12px 24px;
        font-size: 0.95rem;
        margin-bottom: 0.75rem;
    }

    .download-button svg {
        width: 20px;
        height: 20px;
    }

    /* 版本信息 */
    .version-info {
        font-size: 0.8rem;
        margin-top: 1rem;
        text-align: center;
    }

    /* EcoCooperation等页面 */
    .eco-hero,
    .campus-hero {
        padding: 70px 0 50px;
    }

    .eco-hero h1,
    .campus-hero h1 {
        font-size: clamp(1.75rem, 5vw, 2.5rem);
        line-height: 1.2;
    }

    /* 特性网格 */
    .features-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
        padding: 0 1rem;
    }

    .feature-card {
        padding: 1.25rem;
        text-align: center;
    }

    .feature-icon {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
        margin: 0 auto 1rem;
    }

    .feature-card h3 {
        font-size: 1.1rem;
        margin-bottom: 0.5rem;
    }

    .feature-card p {
        font-size: 0.85rem;
        line-height: 1.5;
    }
}

/* 小屏优化（640px - 767px）*/
@media (min-width: 640px) and (max-width: 767px) {
    .methods-grid,
    .opportunity-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }

    .partner-hero-content {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 平板优化（768px - 1023px）*/
@media (min-width: 768px) and (max-width: 1023px) {
    .download-hero,
    .partner-hero {
        padding: 100px 0 80px;
    }

    .methods-grid,
    .opportunity-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }

    .download-methods,
    .market-opportunity {
        padding: 60px 0;
    }

    .partner-hero-content {
        grid-template-columns: 1.2fr 0.8fr;
        gap: 3rem;
    }
}

/* 横屏优化 */
@media (max-width: 1024px) and (orientation: landscape) {
    .download-hero,
    .partner-hero,
    .eco-hero,
    .campus-hero {
        padding: 50px 0 40px;
    }

    .download-methods,
    .market-opportunity {
        padding: 30px 0;
    }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .download-method-card,
    .partner-form,
    .opportunity-card,
    .feature-card,
    .download-button,
    .submit-btn {
        min-height: 48px;
        min-width: 48px;
    }

    .download-method-card:active,
    .download-button:active,
    .submit-btn:active {
        transform: scale(0.98);
    }

    .download-method-card:hover {
        transform: none;
        box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    }

    .submit-btn:hover {
        transform: none;
    }
}

/* 动画优化（移动端禁用复杂动画）*/
@media (max-width: 767px) {
    .particles-bg {
        display: none;
    }

    .particle {
        display: none;
    }

    .download-method-card,
    .opportunity-card,
    .feature-card {
        transition: none;
    }

    /* 简化加载动画 */
    @keyframes fadeInUp {
        from {
            opacity: 0;
            transform: translateY(10px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .download-method-card,
    .opportunity-card,
    .feature-card {
        animation: fadeInUp 0.3s ease-out;
    }
}

/* 二维码扫描提示 */
@media (max-width: 767px) {
    .qr-scan-hint {
        font-size: 0.75rem;
        margin-top: 0.5rem;
        opacity: 0.8;
    }

    .qr-code-wrapper {
        position: relative;
    }
}

/* 表单验证错误样式优化 */
@media (max-width: 767px) {
    .form-input.error {
        border-color: #dc3545;
        background: rgba(220, 53, 69, 0.1);
    }

    .form-input.error:focus {
        box-shadow: 0 0 0 2px rgba(220, 53, 69, 0.2);
    }
}

/* Hero背景优化 */
@media (max-width: 767px) {
    .download-hero,
    .partner-hero,
    .eco-hero,
    .campus-hero {
        background-size: cover;
        background-position: center 70%;
    }

    .download-hero::before,
    .partner-hero::before {
        display: none;
    }
}

/* 下载进度条 */
@media (max-width: 767px) {
    .download-progress {
        height: 8px;
        margin-top: 1rem;
        border-radius: 4px;
    }

    .download-progress-bar {
        height: 100%;
        transition: width 0.3s ease;
    }
}

/* 版本对比表格 */
@media (max-width: 767px) {
    .version-table {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        margin: 0 -1rem;
        padding: 0 1rem;
    }

    .version-table table {
        font-size: 0.85rem;
        min-width: 600px;
    }

    .version-table th,
    .version-table td {
        padding: 0.75rem 0.5rem;
    }
}

/* 合作优势卡片 */
@media (max-width: 767px) {
    .advantages-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
        padding: 0 1rem;
    }

    .advantage-card {
        padding: 1.25rem;
        text-align: center;
    }

    .advantage-icon {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
        margin: 0 auto 1rem;
    }

    .advantage-card h3 {
        font-size: 1.1rem;
        margin-bottom: 0.5rem;
    }

    .advantage-card p {
        font-size: 0.85rem;
        line-height: 1.5;
    }
}

/* 减少动画模式 */
@media (prefers-reduced-motion: reduce) {
    .particles-bg,
    .particle {
        display: none;
    }

    .download-method-card,
    .opportunity-card,
    .feature-card,
    .advantage-card {
        transition: none;
        animation: none;
    }

    @keyframes fadeInUp {
        animation-duration: 0.01ms !important;
    }
}

/* 高对比度模式 */
@media (prefers-contrast: high) {
    .download-method-card,
    .partner-form,
    .opportunity-card,
    .feature-card {
        border: 2px solid #000000;
    }

    .method-icon,
    .feature-icon,
    .advantage-icon {
        border: 2px solid #000000;
    }

    .download-button,
    .submit-btn {
        border-width: 2px;
    }
}

/* 打印样式 */
@media print {
    .download-hero,
    .partner-hero {
        page-break-after: always;
    }

    .download-method-card,
    .opportunity-card,
    .feature-card,
    .advantage-card {
        break-inside: avoid;
    }

    .partner-form,
    .qr-code-wrapper {
        page-break-inside: avoid;
    }
}

/* 优化图片加载 */
@media (max-width: 767px) {
    .qr-code-wrapper img,
    .method-icon,
    .feature-icon,
    .advantage-icon {
        background: #f0f0f0;
    }

    img[loading="lazy"] {
        background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
        background-size: 200% 100%;
        animation: loading 1.5s infinite;
    }

    img[loading="lazy"].loaded {
        background: none;
        animation: none;
    }
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* 下载文件信息 */
@media (max-width: 767px) {
    .file-info {
        padding: 0.75rem;
        margin-bottom: 0.5rem;
        background: #f8f9fa;
        border-radius: 8px;
    }

    .file-name {
        font-size: 0.9rem;
        font-weight: 600;
        margin-bottom: 0.25rem;
        word-break: break-all;
    }

    .file-meta {
        font-size: 0.75rem;
        color: #6c757d;
    }
}

/* 合作流程 */
@media (max-width: 767px) {
    .cooperation-steps {
        grid-template-columns: 1fr;
        gap: 1.25rem;
        padding: 0 1rem;
    }

    .step-item {
        padding: 1.25rem;
        text-align: center;
    }

    .step-number {
        width: 40px;
        height: 40px;
        font-size: 1.25rem;
        margin: 0 auto 0.75rem;
    }

    .step-item h3 {
        font-size: 1.1rem;
        margin-bottom: 0.5rem;
    }

    .step-item p {
        font-size: 0.85rem;
        line-height: 1.5;
    }
}

/* 字体加载优化 */
.font-loading .download-hero h1,
.font-loading .partner-hero h1,
.font-loading .eco-hero h1,
.font-loading .campus-hero h1 {
    font-family: system-ui, -apple-system, sans-serif;
}

/* 触摸反馈 */
@media (hover: none) and (pointer: coarse) {
    .download-method-card:active::after,
    .download-button:active::after,
    .submit-btn:active::after {
        content: '';
        position: absolute;
        inset: 0;
        background: rgba(40, 167, 69, 0.1);
        animation: touch-ripple 0.6s ease-out;
    }
}

@keyframes touch-ripple {
    0% {
        opacity: 0.6;
    }
    100% {
        opacity: 0;
    }
}

/* 成功提交提示 */
@media (max-width: 767px) {
    .success-message {
        padding: 1.25rem;
        border-radius: 12px;
        margin: 1rem;
        text-align: center;
    }

    .success-message h3 {
        font-size: 1.1rem;
        margin-bottom: 0.5rem;
    }

    .success-message p {
        font-size: 0.9rem;
        line-height: 1.5;
    }
}