/* ============================================
   三优网络 - 响应式样式表
   适配：平板(≤968px) | 手机(≤640px)
   ============================================ */

/* ---------- 平板适配 (≤968px) ---------- */
@media (max-width: 968px) {
    
    /* 导航 */
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .mobile-menu {
        display: flex;
    }
    
    /* Hero */
    .hero-content {
        grid-template-columns: 1fr;
        gap: 3rem;
        text-align: center;
    }
    
    .hero-left {
        order: 2;
    }
    
    .hero-right {
        order: 1;
    }
    
    .hero h1 {
        font-size: 2.8rem;
    }
    
    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-cta-group {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-visual {
        max-width: 500px;
        margin: 0 auto;
    }
    
    /* 区块 */
    .section {
        padding: 4rem 1.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    /* 服务卡片 - 平板2列 */
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* AI建站 */
    .plan-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .plan-card {
        max-width: 420px;
        margin: 0 auto;
    }

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

    .features-showcase {
        margin-top: 3rem;
    }

    .features-showcase-title {
        font-size: 1.5rem;
    }
    
    /* SEO */
    .seo-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    /* 为什么选择我们 */
    .why-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    
    .why-item {
        padding: 1.5rem 1rem;
    }
    
    .why-number {
        font-size: 2.5rem;
    }
    
    /* 页脚 */
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }
    
    .footer-brand {
        grid-column: 1 / -1;
    }
    
    /* 案例 */
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ---------- 手机适配 (≤640px) ---------- */
@media (max-width: 640px) {
    
    /* 基础 */
    html {
        font-size: 14px;
    }
    
    .section {
        padding: 3rem 1rem;
    }
    
    /* Hero */
    .hero {
        padding: 5rem 1rem 3rem;
        min-height: auto;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

    .hero-visual {
        display: none;
    }

    .hero-content {
        gap: 2rem;
    }
    
    .hero-price {
        padding: 0.8rem 1.5rem;
    }
    
    .hero-price .number {
        font-size: 2.8rem;
    }
    
    .hero-price .currency {
        font-size: 1.2rem;
    }
    
    .hero-cta-group {
        flex-direction: column;
        width: 100%;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
        text-align: center;
    }
    
    .hero-stats {
        gap: 1.5rem;
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
    
    /* 服务卡片 */
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .service-card {
        padding: 2rem;
    }

    /* 全局标题缩小 */
    .section-title {
        font-size: 1.5rem;
    }

    .section-desc {
        font-size: 0.95rem;
    }
    
    /* AI建站 */
    .plan-container {
        padding: 3rem 1rem;
    }
    
    .plan-price-big {
        font-size: 3rem;
    }
    
    .plan-card {
        padding: 2rem 1.5rem;
    }
    
    .plan-badge {
        padding: 0.4rem 2.5rem;
        font-size: 0.8rem;
    }

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

    .features-grid .feature-item {
        flex-direction: row;
        text-align: left;
        padding: 1.2rem 1rem;
    }

    .features-grid .feature-check {
        margin-bottom: 0;
        width: 32px;
        height: 32px;
        font-size: 0.9rem;
    }

    .features-showcase {
        margin-top: 2rem;
    }

    .features-showcase-title {
        font-size: 1.3rem;
    }
    
    /* 为什么选择我们 */
    .why-grid {
        grid-template-columns: 1fr;
    }
    
    .why-number {
        font-size: 2.5rem;
    }
    
    /* 案例 */
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .case-overlay {
        transform: translateY(0);
        background: linear-gradient(to top, rgba(10, 14, 39, 0.9) 0%, rgba(10, 14, 39, 0.6) 60%, transparent 100%);
    }
    
    /* 联系 */
    .contact-phone {
        font-size: 1.8rem;
    }
    
    /* 页脚 */
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: 0.5rem;
    }
    
    /* 面包屑 */
    .breadcrumb {
        padding: 0.8rem 1rem;
        font-size: 0.8rem;
    }
}

/* ---------- 小屏手机 (≤380px) ---------- */
@media (max-width: 380px) {
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .hero-price .number {
        font-size: 2.2rem;
    }
    
    .section-title {
        font-size: 1.6rem;
    }
    
    .plan-price-big {
        font-size: 2.5rem;
    }
}

/* ---------- 横屏手机 ---------- */
@media (max-height: 500px) and (orientation: landscape) {
    .hero {
        min-height: auto;
        padding-top: 4rem;
    }
    
    .hero-content {
        gap: 2rem;
    }
}

/* ---------- 暗黑模式偏好 ---------- */
@media (prefers-color-scheme: dark) {
    /* 已经是暗黑主题，无需额外设置 */
}

/* ---------- 减少动画偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    #freight-canvas {
        display: none;
    }
}

/* ---------- 打印样式 ---------- */
@media print {
    .navbar,
    #freight-canvas,
    .hero-visual,
    .mobile-menu-btn,
    .btn-primary,
    .btn-secondary,
    .plan-cta,
    .contact-cta {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .section {
        padding: 2rem 1rem;
        max-width: 100%;
    }
}

/* ---------- GEO & 对比表格 平板适配 ---------- */
@media (max-width: 968px) {
    .geo-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    .geo-features {
        grid-template-columns: 1fr 1fr;
    }
    .comparison-table th,
    .comparison-table td {
        padding: 0.8rem 1rem;
        font-size: 0.85rem;
    }
}

/* ---------- GEO & 对比表格 手机适配 ---------- */
@media (max-width: 640px) {
    .geo-features {
        grid-template-columns: 1fr;
    }
    .geo-feature-card {
        padding: 1.2rem;
    }
    .comparison-table th,
    .comparison-table td {
        padding: 0.6rem 0.8rem;
        font-size: 0.8rem;
    }
}

/* ---------- 新闻中心 响应式适配 ---------- */
@media (max-width: 968px) {
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }

    .page-header {
        padding: 6rem 2rem 3rem;
    }

    .page-header h1 {
        font-size: 2rem;
    }

    .article-title {
        font-size: 1.6rem;
    }

    .article-featured-image {
        height: 280px;
    }
}

@media (max-width: 640px) {
    .news-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .news-img {
        height: 180px;
    }

    .news-section {
        padding: 3rem 0;
    }

    .news-more {
        margin-top: 2rem;
    }

    .page-header {
        padding: 5rem 1rem 2.5rem;
    }

    .page-header h1 {
        font-size: 1.6rem;
    }

    .page-header p {
        font-size: 0.95rem;
    }

    .article-section {
        padding: 2rem 0 4rem;
    }

    .article-title {
        font-size: 1.4rem;
    }

    .article-featured-image {
        height: 200px;
    }

    .article-content {
        font-size: 0.95rem;
    }

    .article-meta {
        flex-direction: column;
        gap: 0.5rem;
    }

    .article-nav {
        flex-direction: column;
        align-items: center;
        gap: 0.75rem;
    }

    .pagination {
        gap: 0.3rem;
    }

    .pagination a,
    .pagination span {
        min-width: 36px;
        height: 36px;
        font-size: 0.85rem;
    }
}