/* ===== 平板 (≤ 900px) ===== */
@media (max-width: 900px) {
    .feature-section.two-col {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .feature-card .feature-title {
        text-align: center;
    }

    .feature-section.two-col .feature-card img {
        max-width: 100%;
    }

    .hero-notes-left,
    .hero-notes-right {
        width: 50%;
        opacity: 0.3;
    }
}

/* ===== 手机 (≤ 600px) ===== */
@media (max-width: 600px) {
    .header-inner {
        padding: 0 12px;
        height: 44px;
    }

    .logo-text {
        font-size: 13px;
    }

    .nav {
        gap: 8px;
    }

    .nav a {
        font-size: 13px;
    }

    .lang-btn {
        padding: 3px 8px;
        font-size: 12px;
        gap: 4px;
    }

    .flag {
        width: 20px;
        height: 14px;
    }

    .hero {
        padding: 90px 16px 24px;
        overflow-x: hidden;
    }

    .logo-img {
        width: 170px;
    }

    .brand-sub {
        font-size: 16px;
    }

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

    .btn-trial {
        padding: 10px 32px;
        font-size: 15px;
    }

    .hero-image-wrap {
        margin: 0 auto;
        max-width: 100%;
    }

    .hero-image img {
        border-radius: 8px;
        max-height: 45vh;
        width: auto;
        max-width: 100%;
    }

    .feature-section {
        padding: 32px 16px;
        max-width: 100%;
    }

    .feature-section.full-width,
    .feature-section.two-col {
        max-width: 100%;
        margin-left: auto;
        margin-right: auto;
    }

    .feature-card {
        align-items: center;
    }

    .feature-card .feature-image-wrap {
        justify-content: center;
    }

    .feature-title {
        font-size: 18px;
    }

    .feature-card .feature-title {
        font-size: 16px;
    }

    .feature-section.two-col {
        gap: 36px;
    }

    .feature-section.two-col .feature-card img {
        max-width: 280px;
        margin: 0 auto;
    }

    .hero-notes-left,
    .hero-notes-right {
        display: none;
    }

    .footer {
        font-size: 13px;
        padding: 30px 16px 40px;
    }

    .float-buy-btn {
        top: 70px;
        right: 12px;
        width: 40px;
        height: 40px;
    }
}