/* ===========================
   響應式設計 - 平板設備
   =========================== */
@media screen and (max-width: 1024px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

    .company-name-zh {
        font-size: 2.8rem;
    }

    .company-name-en {
        font-size: 1.3rem;
    }

    .slogan {
        font-size: 1.5rem;
        letter-spacing: 3px;
    }

    .section-title {
        font-size: 2rem;
    }

    .product-showcase-container {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .app-showcase {
        gap: var(--spacing-sm);
    }

    .app-screen {
        flex: 0 0 180px;
        max-height: 380px;
    }

    .about-features {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

/* ===========================
   響應式設計 - 手機設備
   =========================== */
@media screen and (max-width: 768px) {
    :root {
        --spacing-sm: 0.75rem;
        --spacing-md: 1.5rem;
        --spacing-lg: 2rem;
        --spacing-xl: 3rem;
    }

    /* 導航欄 */
    .navbar .container {
        padding-top: 0.75rem;
        padding-bottom: 0.75rem;
    }

    .nav-brand {
        font-size: 1.2rem;
    }

    .nav-menu {
        position: fixed;
        top: 60px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 60px);
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding-top: var(--spacing-md);
        transition: left var(--transition-normal);
        box-shadow: var(--shadow-lg);
    }

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

    .nav-menu li {
        width: 100%;
        text-align: center;
        padding: var(--spacing-sm) 0;
    }

    .nav-link {
        display: block;
        font-size: 1.2rem;
        padding: var(--spacing-sm);
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

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

    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    /* Hero 區域 */
    .company-name-zh {
        font-size: 2rem;
        line-height: 1.3;
    }

    .company-name-en {
        font-size: 1rem;
        letter-spacing: 1px;
    }

    .slogan {
        font-size: 1.2rem;
        letter-spacing: 2px;
        margin-top: var(--spacing-md);
    }

    .scroll-indicator {
        bottom: 30px;
    }

    /* 區域標題 */
    .section-title {
        font-size: 1.8rem;
    }

    .section-header {
        margin-bottom: var(--spacing-md);
    }

    /* 產品展示區 */
    .product-name {
        font-size: 2rem;
    }

    .product-tagline {
        font-size: 1.1rem;
    }

    .product-showcase-container {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .app-showcase {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-md);
    }

    .app-screen {
        flex: 0 0 auto;
        width: 100%;
        max-width: 280px;
        max-height: 600px;
    }

    .product-features {
        width: 100%;
    }

    .feature-card {
        padding: var(--spacing-sm);
    }

    .feature-title {
        font-size: 1.3rem;
    }

    /* 用戶流程 */
    .user-flow-section {
        padding: var(--spacing-sm);
    }

    .flow-section-title {
        font-size: 1.5rem;
    }

    .flow-steps {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .flow-step {
        width: 100%;
        min-width: auto;
        padding: var(--spacing-sm);
    }

    .flow-arrow {
        transform: rotate(90deg);
        font-size: 1.5rem;
    }

    /* 關於我們區域 */
    .about-text {
        font-size: 1rem;
        line-height: 1.8;
    }

    .about-features {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .about-card {
        padding: var(--spacing-sm);
    }

    .about-card h3 {
        font-size: 1.3rem;
    }

    .team-title {
        font-size: 1.5rem;
    }

    /* 頁腳 */
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .footer-brand h3 {
        font-size: 1.5rem;
    }

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

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

    .footer-bottom p {
        font-size: 0.85rem;
        line-height: 1.5;
    }
}

/* ===========================
   響應式設計 - 小型手機
   =========================== */
@media screen and (max-width: 480px) {
    :root {
        font-size: 14px;
    }

    .company-name-zh {
        font-size: 1.8rem;
    }

    .company-name-en {
        font-size: 0.9rem;
    }

    .slogan {
        font-size: 1rem;
        letter-spacing: 1px;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .product-name {
        font-size: 1.6rem;
    }

    .product-tagline {
        font-size: 1rem;
    }

    .feature-icon,
    .about-icon {
        width: 50px;
        height: 50px;
    }

    .feature-icon svg,
    .about-icon svg {
        width: 28px;
        height: 28px;
    }

    .step-number {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }

    .step-content h4 {
        font-size: 1rem;
    }

    .step-content p {
        font-size: 0.85rem;
    }
}

/* ===========================
   響應式設計 - 超大屏幕
   =========================== */
@media screen and (min-width: 1400px) {
    .container {
        max-width: 1400px;
    }

    .company-name-zh {
        font-size: 4rem;
    }

    .company-name-en {
        font-size: 1.8rem;
    }

    .slogan {
        font-size: 2rem;
        letter-spacing: 5px;
    }

    .section-title {
        font-size: 3rem;
    }

    .product-showcase-container {
        gap: var(--spacing-xl);
    }

    .app-screen {
        flex: 0 0 180px;
        max-height: 400px;
    }

    .about-features {
        gap: var(--spacing-lg);
    }
}

/* ===========================
   打印樣式
   =========================== */
@media print {
    .navbar,
    .scroll-indicator,
    .hamburger {
        display: none;
    }

    body {
        font-size: 12pt;
        line-height: 1.5;
        color: #000;
    }

    section {
        page-break-inside: avoid;
        padding: 1rem 0;
    }

    .hero-section {
        height: auto;
        padding: 2rem 0;
        background: none;
    }

    .company-name-zh,
    .company-name-en,
    .slogan {
        color: #000;
    }

    a {
        text-decoration: underline;
        color: #000;
    }

    .feature-card,
    .about-card {
        box-shadow: none;
        border: 1px solid #ccc;
    }
}

/* ===========================
   無障礙設計 - 高對比度模式
   =========================== */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #d32f2f;
        --gray-medium: #333;
    }

    .nav-link,
    .feature-description,
    .about-text {
        color: #000;
    }

    .feature-card,
    .about-card {
        border: 2px solid #000;
    }
}

/* ===========================
   無障礙設計 - 減少動畫
   =========================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .scroll-indicator {
        display: none;
    }
}

/* ===========================
   橫屏模式優化
   =========================== */
@media screen and (max-height: 600px) and (orientation: landscape) {
    .hero-section {
        height: auto;
        min-height: 100vh;
        padding: var(--spacing-lg) 0;
    }

    .company-name-zh {
        font-size: 2rem;
    }

    .company-name-en {
        font-size: 1rem;
    }

    .slogan {
        font-size: 1.2rem;
        margin-top: var(--spacing-sm);
    }

    .scroll-indicator {
        display: none;
    }

    section {
        padding: var(--spacing-md) 0;
    }
}