/* ========================================
   移動端專用樣式 (mobile.css)
   適用於所有頁面的手機版優化
   ======================================== */

/* 手機裝置 (最大寬度 640px) */
@media (max-width: 640px) {
    /* ---------- 全局調整 ---------- */
    section {
        padding: 60px 0;
    }

    .container {
        padding: 0 16px;
    }

    /* ---------- 導航欄 ---------- */
    .navbar {
        padding: 12px 0;
    }

    .logo {
        font-size: 1.4rem;
    }

    .logo span {
        font-size: 1.5rem;
    }

    .menu-icon {
        font-size: 1.4rem;
        margin-left: 12px;
        margin-right: 4px;
    }

    #themeToggle {
        padding: 4px 10px;
        font-size: 0.8rem;
        margin-left: 0.5rem;
    }

    /* ---------- 导航栏移动端适配 ---------- */
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        left: auto;
        width: 55%;
        max-width: 260px;
        height: 100vh;
        background: var(--navbar-bg);
        flex-direction: column;
        padding: 80px 24px 32px 24px;
        gap: 1.2rem;
        transition: right 0.35s cubic-bezier(0.2, 0.9, 0.4, 1.1);
        border-left: 1px solid var(--navbar-border);
        z-index: 999;
        overflow-y: auto;
    }

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

    .nav-links li {
        width: 100%;
        text-align: center;
        opacity: 0;
        transform: translateX(20px);
        transition: opacity 0.3s ease, transform 0.3s ease;
    }

    .nav-links.active li {
        opacity: 1;
        transform: translateX(0);
    }

    .nav-links li:nth-child(1) { transition-delay: 0.05s; }
    .nav-links li:nth-child(2) { transition-delay: 0.1s; }
    .nav-links li:nth-child(3) { transition-delay: 0.15s; }
    .nav-links li:nth-child(4) { transition-delay: 0.2s; }
    .nav-links li:nth-child(5) { transition-delay: 0.25s; }
    .nav-links li:nth-child(6) { transition-delay: 0.3s; }

    .nav-links a {
        display: block;
        padding: 10px 0;
        font-size: 1rem;
        letter-spacing: 2px;
        color: var(--text-primary);
    }

    .nav-links a:hover,
    .nav-links a.active {
        color: var(--accent);
    }

    .menu-icon {
        display: block;
        z-index: 1001;
    }

    .menu-icon:active {
        transform: scale(0.92);
    }

    body.menu-open {
        overflow: hidden;
    }

    .menu-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5);
        z-index: 998;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease, visibility 0.3s ease;
        backdrop-filter: blur(2px);
    }

    .menu-overlay.active {
        opacity: 1;
        visibility: visible;
    }

    /* ---------- 頁面標題 ---------- */
    .page-header {
        padding-top: 100px;
        padding-bottom: 40px;
    }

    .page-header h1 {
        font-size: clamp(2rem, 7vw, 3rem);
    }

    .page-header p {
        font-size: 0.95rem;
        padding: 0 16px;
    }

    /* ---------- 按鈕 ---------- */
    .btn-primary, .btn-outline {
        padding: 12px 24px;
        font-size: 0.8rem;
    }

    .btn-group {
        gap: 10px;
    }

    /* ---------- 地區切換器 ---------- */
    .region-switcher select {
        padding: 4px 8px;
        font-size: 0.8rem;
        padding-right: 20px;
    }

    /* ---------- 卡片網格 ---------- */
    .showcase-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

    .features-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

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

    .qr-cards {
        grid-template-columns: 1fr;
    }

    /* ---------- 畫作/商品卡片 ---------- */
    .car-card {
        border-radius: 16px;
        transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .car-card:active {
        transform: scale(0.98);
    }

    .card-img {
        height: 180px;
    }

    .card-img span {
        font-size: 0.65rem;
        padding: 4px 10px;
        margin: 10px;
        border-left-width: 2px;
    }

    .card-info {
        padding: 12px 10px 14px;
    }

    /* 標題 */
    .card-info h3 {
        font-size: 0.95rem;
        margin-bottom: 6px;
        line-height: 1.3;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    /* 描述 */
    .card-info p {
        font-size: 0.7rem;
        line-height: 1.4;
        margin-bottom: 8px;
        -webkit-line-clamp: 2;
        display: -webkit-box;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    /* 標籤 */
    .tag {
        font-size: 0.55rem;
        padding: 2px 6px;
        margin-right: 3px;
        border-radius: 12px;
    }

    /* 價格 */
    .product-price {
        font-size: 0.75rem !important;
        margin-top: 6px;
    }

    /* 卡片內標籤容器 */
    .card-info div {
        display: flex;
        flex-wrap: wrap;
        gap: 4px;
    }

    /* ---------- 特色卡片 ---------- */
    .feature-card {
        padding: 24px 16px;
    }

    .feature-card i {
        font-size: 1.8rem;
        margin-bottom: 12px;
    }

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

    .feature-card p {
        font-size: 0.8rem;
    }

    /* ---------- 二維碼卡片 ---------- */
    .feature-card img[alt="QR Code"] {
        width: 100px !important;
        height: 100px !important;
    }

    /* ---------- 輪播圖 ---------- */
    .carousel {
        height: 40vh;
        min-height: 250px;
        border-radius: 16px;
    }

    .carousel-caption {
        padding: 20px 24px;
    }

    .carousel-caption h3 {
        font-size: 1.3rem;
    }

    .carousel-caption p {
        font-size: 0.85rem;
    }

    .carousel-btn {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }

    /* ---------- 頁面標題區 ---------- */
    .section-title {
        font-size: clamp(1.6rem, 6vw, 2.4rem);
    }

    .section-sub {
        font-size: 0.9rem;
        padding: 0 12px;
    }

    /* ---------- 頁腳 ---------- */
    .footer-grid {
        gap: 24px;
        flex-direction: column;
        text-align: center;
    }

    .footer-col {
        flex: 1 1 100%;
    }

    .footer-col p {
        white-space: normal;
        font-size: 0.8rem;
    }

    .footer-col ul {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 12px;
    }

    .footer-col ul li {
        list-style: none;
    }

    .social-links {
        justify-content: center;
    }

    /* ---------- 篩選按鈕 ---------- */
    .filter-nav {
        gap: 8px;
    }

    .filter-btn {
        padding: 6px 14px;
        font-size: 0.75rem;
    }

    /* ---------- 統計卡片 ---------- */
    .stat-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .stat-card {
        padding: 16px;
    }

    .stat-card h3 {
        font-size: 1.4rem;
    }

    /* ---------- 回到頂部按鈕 ---------- */
    .scroll-btn {
        width: 40px;
        height: 40px;
        font-size: 1rem;
        right: 12px;
    }

    #backToTop {
        bottom: 70px;
    }

    #goToBottom {
        bottom: 18px;
    }

    /* ---------- 聯絡表單 ---------- */
    .contact-form {
        padding: 24px;
    }

    /* ---------- CTA 區塊 ---------- */
    .cta {
        margin: 20px 16px;
        padding: 40px 24px;
    }

    .cta h2 {
        font-size: 1.5rem;
    }
}

/* 超小屏裝置 (最大寬度 380px) */
@media (max-width: 380px) {
    .logo {
        font-size: 1.2rem;
    }

    .logo span {
        font-size: 1.3rem;
    }

    .nav-right {
        gap: 6px;
    }

    #themeToggle {
        padding: 4px 10px;
        font-size: 0.85rem;
    }

    .region-switcher select {
        padding: 4px 8px;
        font-size: 0.85rem;
    }

    .hero-bg {
        min-height: 70vh;
    }

    .card-img {
        height: 150px;
    }

    .card-info h3 {
        font-size: 0.85rem;
    }

    .card-info p {
        font-size: 0.65rem;
    }

    .tag {
        font-size: 0.5rem;
        padding: 1px 5px;
    }

    .carousel {
        height: 35vh;
        min-height: 220px;
    }

    .stat-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }

    .stat-card h3 {
        font-size: 1.2rem;
    }
}