/* ========================================
   魔思科技官网 - 响应式样式（黑红主题）
   ======================================== */

/* Tablet (<= 991px) */
@media (max-width: 991px) {
    .container {
        padding: 0 20px;
    }

    .hero-title {
        font-size: 2.75rem;
    }

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

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px 24px;
    }

    .stat-item:nth-child(2)::after {
        display: none;
    }

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

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

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

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

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

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

    .about-intro-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .about-intro-image {
        max-width: 500px;
        margin: 0 auto;
    }

    /* Timeline */
    .timeline::before {
        left: 20px;
    }

    .timeline-item,
    .timeline-item:nth-child(odd) {
        flex-direction: row;
    }

    .timeline-content {
        width: calc(100% - 60px);
        margin-left: 40px;
    }

    .timeline-year {
        left: 20px;
        transform: translateX(-50%);
    }
}

/* Mobile (<= 767px) */
@media (max-width: 767px) {
    .section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .section-title-left {
        font-size: 1.5rem;
    }

    .hero {
        padding: 120px 0 80px;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 12px;
    }

    .hero-buttons .btn {
        width: 100%;
    }

    .nav-desktop {
        display: none;
    }

    .hamburger {
        display: flex;
    }

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

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

    .stat-item::after {
        display: none !important;
    }

    .cases-grid {
        grid-template-columns: 1fr;
    }

    .blog-grid {
        grid-template-columns: 1fr;
    }

    .solutions-grid {
        grid-template-columns: 1fr;
    }

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

    .values-grid {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .contact-info-card,
    .contact-form-card {
        padding: 28px;
    }

    .case-detail-card {
        padding: 24px;
    }

    .cta-title {
        font-size: 1.75rem;
    }

    .cta-desc {
        font-size: 1rem;
    }

    .page-header {
        padding: 110px 0 40px;
    }

    .page-header h1 {
        font-size: 1.875rem;
    }

    .page-header p {
        font-size: 1rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .filter-tabs {
        gap: 6px;
    }

    .filter-tab {
        padding: 6px 14px;
        font-size: 0.875rem;
    }

    .case-detail-header {
        flex-direction: column;
        gap: 12px;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 42px;
        height: 42px;
    }

    /* 移动端案例二维码：改为角标提示，点击进入详情页扫码 */
    .case-qr-hover {
        position: absolute;
        top: 12px;
        right: 12px;
        left: auto;
        bottom: auto;
        inset: auto;
        width: auto;
        height: auto;
        background: rgba(229, 9, 20, 0.9);
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        opacity: 1;
        visibility: visible;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 6px 10px;
        border-radius: 100px;
        z-index: 3;
        transform: none;
    }

    .case-qr-hover-inner {
        transform: none;
        display: flex;
        align-items: center;
        gap: 4px;
    }

    .case-qr-hover-inner img {
        display: none;
    }

    .case-qr-hover-text {
        color: #FFFFFF;
        font-size: 0.75rem;
        font-weight: 600;
        letter-spacing: 0.3px;
    }

    .case-qr-hover-text::before {
        content: '📱';
        margin-right: 2px;
    }

    /* 移动端案例详情页二维码卡片：垂直布局，二维码居中 */
    .case-qr-card {
        padding: 24px 20px;
    }

    .case-qr-card-inner {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }

    .case-qr-image-wrap {
        width: 180px;
        height: 180px;
    }

    .case-qr-info {
        text-align: center;
        max-width: 100%;
    }

    .case-qr-title {
        justify-content: center;
    }

    .case-qr-tips {
        justify-content: center;
    }

    .case-qr-desc {
        font-size: 0.9375rem;
    }
}

/* Small Mobile (<= 479px) */
@media (max-width: 479px) {
    .container {
        padding: 0 16px;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .stat-number {
        font-size: 2.5rem;
    }

    .team-grid {
        grid-template-columns: 1fr;
    }

    .feature-card {
        padding: 28px 24px;
    }

    .solution-body {
        padding: 22px;
    }

    .faq-question {
        font-size: 0.9375rem;
        padding: 16px 18px;
    }

    .cta-title {
        font-size: 1.5rem;
    }
}