/* ============================================================
   极空BMS 独立站 - 移动端响应式样式
   断点：平板 1024px / 768px / 手机 480px
   ============================================================ */

/* ===== 平板及以下（< 1024px） ===== */
@media (max-width: 1024px) {
    .hero-grid {
        gap: 2.5rem;
    }
    .hero h1 {
        font-size: 2.6rem;
    }
    .hero-stats .stat .num {
        font-size: 1.4rem;
    }
}

/* ===== 平板（< 768px） ===== */
@media (max-width: 768px) {
    .container {
        padding: 0 1.2rem;
    }

    /* ---- 导航栏 ---- */
    .nav-right {
        display: none;
        flex-direction: column;
        width: 100%;
        gap: 0.8rem;
        padding: 1rem 0;
        border-top: 1px solid var(--border-color);
        align-items: stretch;
    }

    .nav-right.open {
        display: flex;
    }

    .nav-links {
        flex-direction: column;
        gap: 0.6rem;
        width: 100%;
    }

    .nav-links a {
        display: block;
        padding: 0.4rem 0;
    }

    .btn-alibaba {
        width: 100%;
        text-align: center;
        padding: 0.6rem 0;
    }

    .menu-toggle {
        display: flex;
    }

    /* ---- Hero 区域 ---- */
    .hero {
        padding: 2.5rem 0 2rem;
    }

    .hero-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

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

    .hero-desc {
        font-size: 1rem;
        max-width: 100%;
        margin-left: auto;
        margin-right: auto;
    }

    .hero-actions {
        justify-content: center;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.8rem;
    }

    .hero-stats .stat .num {
        font-size: 1.3rem;
    }

    .hero-image-placeholder {
        min-height: 200px;
        padding: 1.2rem;
    }

    .hero-image-placeholder img {
        max-height: 160px;
    }

    /* ---- 参数 ---- */
    .params-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.8rem;
    }

    .param-card {
        padding: 1rem 0.6rem;
    }

    .param-value {
        font-size: 1.3rem;
    }

    /* ---- 区块标题 ---- */
    .section-header h2 {
        font-size: 1.6rem;
    }

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

    /* ---- 功能特点 ---- */
    .features-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    /* ---- 应用场景 ---- */
    .scenes-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .scene-card {
        padding: 1rem;
    }

    .scene-img {
        height: 100px;
    }

    /* ---- 联系 ---- */
    .contact {
        padding: 3rem 0;
    }

    .contact-box {
        padding: 1.8rem 1.2rem;
    }

    .contact-content h2 {
        font-size: 1.5rem;
    }

    .contact-info {
        gap: 1rem;
        flex-direction: column;
        align-items: center;
    }

    .btn-alibaba-large {
        width: 100%;
        text-align: center;
        padding: 0.8rem 1.5rem;
        font-size: 1rem;
    }

    /* ---- 页脚 ---- */
    .footer {
        padding: 2rem 0 1rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 1.2rem;
        text-align: center;
    }

    .footer-links {
        flex-direction: row;
        justify-content: center;
        flex-wrap: wrap;
        gap: 0.6rem 1.2rem;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: 0.3rem;
        font-size: 0.75rem;
    }
}

/* ===== 手机小屏（< 480px） ===== */
@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    /* ---- 语言栏 ---- */
    .lang-bar .container {
        justify-content: center;
        font-size: 0.75rem;
    }

    .lang-btn {
        font-size: 0.75rem;
        padding: 0.1rem 0.3rem;
    }

    /* ---- 导航 ---- */
    .logo {
        font-size: 1.1rem;
    }
    .logo img {
        height: 26px;
    }

    /* ---- Hero ---- */
    .hero {
        padding: 1.8rem 0 1.5rem;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .hero-desc {
        font-size: 0.95rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
        gap: 0.6rem;
    }

    .btn-primary,
    .btn-secondary {
        width: 100%;
        text-align: center;
        padding: 0.7rem;
        font-size: 0.95rem;
    }

    .hero-stats {
        grid-template-columns: 1fr 1fr;
        gap: 0.5rem;
        padding-top: 1rem;
    }

    .hero-stats .stat .num {
        font-size: 1.1rem;
    }

    .hero-stats .stat .label {
        font-size: 0.7rem;
    }

    .hero-image-placeholder {
        min-height: 160px;
        padding: 1rem;
    }

    .hero-image-placeholder img {
        max-height: 120px;
    }

    .hero-image-tag {
        font-size: 0.7rem;
    }

    /* ---- 参数 ---- */
    .params {
        padding: 2.5rem 0;
    }

    .params-grid {
        grid-template-columns: 1fr 1fr;
        gap: 0.6rem;
    }

    .param-card {
        padding: 0.8rem 0.4rem;
    }

    .param-icon {
        font-size: 1.4rem;
        margin-bottom: 0.1rem;
    }

    .param-value {
        font-size: 1.1rem;
    }

    .param-label {
        font-size: 0.7rem;
    }

    /* ---- 区块标题 ---- */
    .section-header {
        margin-bottom: 1.5rem;
    }

    .section-header h2 {
        font-size: 1.3rem;
    }

    .section-header p {
        font-size: 0.85rem;
    }

    /* ---- 功能特点 ---- */
    .features {
        padding: 2.5rem 0;
    }

    .features-grid {
        gap: 0.8rem;
    }

    .feature-card {
        padding: 1.2rem;
    }

    .feature-icon {
        width: 36px;
        height: 36px;
    }

    .feature-icon svg {
        width: 24px;
        height: 24px;
    }

    .feature-card h3 {
        font-size: 1rem;
    }

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

    /* ---- 应用场景 ---- */
    .scenes {
        padding: 2.5rem 0;
    }

    .scenes-grid {
        grid-template-columns: 1fr 1fr;
        gap: 0.6rem;
    }

    .scene-card {
        padding: 0.8rem 0.6rem;
    }

    .scene-img {
        height: 80px;
        border-radius: 6px;
    }

    .scene-card h3 {
        font-size: 0.9rem;
    }

    .scene-card p {
        font-size: 0.75rem;
    }

    /* ---- 联系 ---- */
    .contact {
        padding: 2.5rem 0;
    }

    .contact-box {
        padding: 1.5rem 1rem;
    }

    .contact-content h2 {
        font-size: 1.3rem;
    }

    .contact-content p {
        font-size: 0.9rem;
    }

    .contact-item {
        font-size: 0.85rem;
    }

    .btn-alibaba-large {
        font-size: 0.95rem;
        padding: 0.7rem 1.2rem;
    }

    /* ---- 页脚 ---- */
    .footer-grid {
        gap: 0.8rem;
    }

    .footer-logo {
        font-size: 1rem;
    }

    .footer-brand p {
        font-size: 0.8rem;
    }

    .footer-links a {
        font-size: 0.8rem;
    }

    .footer-ali-link {
        font-size: 0.9rem;
    }

    .footer-bottom {
        font-size: 0.7rem;
    }
}

/* ===== 小屏手机安全补丁 ===== */
@media (max-width: 380px) {
    .hero h1 {
        font-size: 1.5rem;
    }

    .params-grid {
        grid-template-columns: 1fr 1fr;
        gap: 0.4rem;
    }

    .scenes-grid {
        grid-template-columns: 1fr 1fr;
        gap: 0.4rem;
    }

    .scene-img {
        height: 60px;
    }

    .param-value {
        font-size: 1rem;
    }
}