/**
 * 响应式样式
 * 断点: 1200px / 992px / 768px
 */

/* ========== 大屏适配 ========== */
@media (max-width: 1200px) {
    .container {
        padding: 0 20px;
    }

    .products-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .clients-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .footer-grid {
        grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
        gap: 30px;
    }
}

/* ========== 侧边栏响应式 ========== */
@media (max-width: 992px) {
    .page-layout {
        grid-template-columns: 1fr !important;
    }
    .sidebar {
        position: relative;
        top: 0;
        order: -1;
    }
    .sidebar-nav {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
    }
    .sidebar-link {
        border: 1px solid var(--border);
        border-radius: 20px;
        padding: 8px 16px;
        font-size: 14px;
        border-bottom: 1px solid var(--border) !important;
    }
    .sidebar-link::before {
        display: none;
    }
    .sidebar-contact {
        display: none;
    }
    .client-logo-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .client-logo-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .section-title-bar {
        flex-direction: column;
        align-items: flex-start;
    }
    .content-body {
        padding: 20px;
    }
}

/* ========== 平板适配 ========== */
@media (max-width: 992px) {
    .header {
        height: 60px;
    }

    .header-contact {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

    .nav {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        padding: 20px;
        gap: 0;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        z-index: 999;
    }

    .nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-item {
        padding: 14px 16px;
        border-bottom: 1px solid var(--border);
        width: 100%;
        text-align: center;
    }

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

    .nav-item::after {
        display: none;
    }

    .hero {
        height: 450px;
        margin-top: 60px;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .page-banner {
        height: 260px;
        margin-top: 60px;
    }

    .page-banner h1 {
        font-size: 32px;
    }

    .section {
        padding: 60px 0;
    }

    .section-header h2 {
        font-size: 28px;
    }

    .about-row {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-img {
        order: -1;
    }

    .products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .news-row {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .news-featured {
        height: 280px;
    }

    .clients-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 16px;
    }

    .contact-bar {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .contact-bar-item {
        padding: 24px;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }

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

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

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .case-card {
        grid-template-columns: 1fr;
    }

    .case-card-img {
        height: 160px;
    }

    .float-bar {
        display: none;
    }

    .hero-arrow {
        display: none;
    }
}

/* ========== 手机适配 ========== */
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }

    .logo-text {
        font-size: 16px;
    }

    .hero {
        height: 400px;
    }

    .hero-title {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 15px;
    }

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

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

    .page-banner {
        height: 220px;
    }

    .page-banner h1 {
        font-size: 26px;
    }

    .breadcrumb {
        font-size: 12px;
    }

    .section {
        padding: 50px 0;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .section-header h2 {
        font-size: 24px;
    }

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

    .product-tabs {
        flex-wrap: wrap;
        gap: 10px;
    }

    .product-tab {
        padding: 8px 20px;
        font-size: 14px;
    }

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

    .client-card {
        min-height: 120px;
        padding: 20px 12px;
    }

    .news-item {
        padding: 12px 14px;
    }

    .news-item-date .day {
        font-size: 22px;
    }

    .news-item-title {
        font-size: 14px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }

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

    .about-info-grid {
        grid-template-columns: 1fr;
    }

    .support-services {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .case-card {
        grid-template-columns: 1fr;
    }

    .job-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .job-meta {
        flex-wrap: wrap;
    }

    .back-to-top {
        width: 40px;
        height: 40px;
        font-size: 14px;
        bottom: 20px;
        right: 16px;
    }
}

/* ========== 超小屏 ========== */
@media (max-width: 480px) {
    .hero {
        height: 350px;
    }

    .hero-title {
        font-size: 22px;
    }

    .hero-subtitle {
        font-size: 13px;
    }

    .section-header h2 {
        font-size: 20px;
    }

    .btn {
        padding: 10px 24px;
        font-size: 14px;
    }

    .page-banner h1 {
        font-size: 22px;
    }
}