/* ===== 響應式設計 ===== */

/* 平板 */
@media (max-width: 1024px) {
    .section {
        padding: 80px 0;
    }

    .hero-title {
        font-size: 2.8rem;
    }

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

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

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

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

    .equip-card-large {
        grid-column: span 2;
    }

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

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

    .footer-brand {
        grid-column: span 2;
    }
}

/* 手機 */
@media (max-width: 768px) {
    html {
        font-size: 15px;
    }

    .section {
        padding: 64px 0;
    }

    .container {
        padding: 0 16px;
    }

    /* 導航 */
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        padding: 80px 24px 24px;
        gap: 4px;
        box-shadow: -4px 0 24px rgba(0,0,0,0.1);
        transition: right 0.3s ease;
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-link {
        color: var(--gray-800) !important;
        padding: 12px 16px;
        width: 100%;
        font-size: 1rem;
    }

    .nav-link:hover,
    .nav-link.active {
        background: rgba(11,61,145,0.06) !important;
        color: var(--primary) !important;
    }

    .nav-cta {
        margin-top: 12px;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    /* Hero */
    .hero-title {
        font-size: 2.2rem;
    }

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

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

    .hero-stats {
        gap: 20px;
    }

    .stat-number {
        font-size: 2rem;
    }

    .stat-divider {
        height: 30px;
    }

    .scroll-indicator {
        display: none;
    }

    /* Section Headers */
    .section-header {
        margin-bottom: 40px;
    }

    .section-title {
        font-size: 1.7rem;
    }

    .section-subtitle {
        font-size: 0.95rem;
    }

    /* 關於 */
    .about-grid {
        grid-template-columns: 1fr;
    }

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

    /* 業務 */
    .services-grid {
        grid-template-columns: 1fr;
    }

    /* 設備 */
    .equipment-grid {
        grid-template-columns: 1fr;
    }

    .equip-card-large {
        grid-column: span 1;
        grid-template-columns: 1fr;
    }

    .equip-card-large .equip-card-video {
        aspect-ratio: 16/9;
        min-height: auto;
    }

    .equip-card-large .equip-card-info {
        padding: 24px;
    }

    /* 施工現場 */
    .site-videos {
        padding: 80px 0;
    }

    .site-video-grid {
        grid-template-columns: 1fr;
    }

    /* 品質 */
    .quality-timeline::before {
        left: 20px;
    }

    .quality-icon {
        width: 40px;
        height: 40px;
        min-width: 40px;
    }

    .quality-icon span {
        font-size: 0.75rem;
    }

    .quality-content {
        padding: 20px;
    }

    /* 實績 */
    .achievements-grid {
        grid-template-columns: 1fr;
    }

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

    .contact-form-wrap {
        padding: 24px;
    }

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

    .contact-line {
        flex-direction: column;
        text-align: center;
    }

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

    .footer-brand {
        grid-column: span 1;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
    }
}

/* 小手機 */
@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }

    .hero-stats {
        flex-direction: column;
        gap: 16px;
    }

    .stat-divider {
        width: 40px;
        height: 1px;
    }

    .quality-item {
        gap: 16px;
    }
}