/* 重置和基礎樣式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #3b82f6;
    --text-dark: #1f2937;
    --text-gray: #6b7280;
    --text-light: #9ca3af;
    --bg-white: #ffffff;
    --bg-light: #f9fafb;
    --bg-gray: #f3f4f6;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--bg-white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 導航欄 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 1rem 0;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 700;
    font-size: 1.25rem;
    transition: opacity 0.3s ease;
}

.brand-link:hover {
    opacity: 0.8;
}

.logo-image {
    height: 40px;
    width: auto;
}

.brand-name {
    color: var(--text-dark);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-menu > li {
    position: relative;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.nav-menu a i {
    font-size: 0.75rem;
}

/* 下拉菜單 */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    padding: 0.5rem 0;
    margin-top: 0.5rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    list-style: none;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    padding: 0;
}

.dropdown-menu a {
    padding: 0.75rem 1.5rem;
    display: block;
    color: var(--text-dark);
    font-weight: 400;
}

.dropdown-menu a:hover {
    background: var(--bg-light);
    color: var(--primary-color);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background: var(--text-dark);
    transition: 0.3s;
}

/* 主頁橫幅 */
.hero {
    min-height: 70vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #0a0e27 0%, #1a1f3a 50%, #0f1419 100%);
    padding-top: 80px;
    position: relative;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
    overflow: hidden;
}

/* 速度線效果 */
.speed-lines {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.speed-line {
    position: absolute;
    width: 2px;
    height: 200%;
    background: linear-gradient(to bottom, 
        transparent 0%, 
        rgba(37, 99, 235, 0.3) 20%, 
        rgba(59, 130, 246, 0.6) 50%, 
        rgba(37, 99, 235, 0.3) 80%, 
        transparent 100%);
    animation: speedLineMove 2s linear infinite;
    box-shadow: 0 0 10px rgba(59, 130, 246, 0.5);
}

.speed-line.line-1 {
    left: 10%;
    animation-delay: 0s;
    animation-duration: 1.5s;
}

.speed-line.line-2 {
    left: 25%;
    animation-delay: 0.2s;
    animation-duration: 1.8s;
}

.speed-line.line-3 {
    left: 40%;
    animation-delay: 0.1s;
    animation-duration: 1.6s;
}

.speed-line.line-4 {
    left: 55%;
    animation-delay: 0.3s;
    animation-duration: 1.7s;
}

.speed-line.line-5 {
    left: 70%;
    animation-delay: 0.15s;
    animation-duration: 1.9s;
}

.speed-line.line-6 {
    left: 85%;
    animation-delay: 0.25s;
    animation-duration: 1.4s;
}

@keyframes speedLineMove {
    0% {
        transform: translateY(-100%) translateX(0);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(100vh) translateX(0);
        opacity: 0;
    }
}

/* 數據粒子效果 */
.data-particles {
    position: absolute;
    width: 100%;
    height: 100%;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(59, 130, 246, 0.8);
    border-radius: 50%;
    box-shadow: 0 0 6px rgba(59, 130, 246, 0.8);
    animation: particleMove 3s linear infinite;
}

.particle:nth-child(1) {
    left: 15%;
    animation-delay: 0s;
    animation-duration: 2.5s;
}

.particle:nth-child(2) {
    left: 30%;
    animation-delay: 0.5s;
    animation-duration: 3s;
}

.particle:nth-child(3) {
    left: 45%;
    animation-delay: 1s;
    animation-duration: 2.8s;
}

.particle:nth-child(4) {
    left: 60%;
    animation-delay: 1.5s;
    animation-duration: 2.2s;
}

.particle:nth-child(5) {
    left: 75%;
    animation-delay: 0.8s;
    animation-duration: 3.2s;
}

.particle:nth-child(6) {
    left: 20%;
    animation-delay: 2s;
    animation-duration: 2.7s;
}

.particle:nth-child(7) {
    left: 50%;
    animation-delay: 1.2s;
    animation-duration: 2.9s;
}

.particle:nth-child(8) {
    left: 80%;
    animation-delay: 0.3s;
    animation-duration: 3.1s;
}

@keyframes particleMove {
    0% {
        transform: translateY(100vh) translateX(0) scale(0);
        opacity: 0;
    }
    10% {
        opacity: 1;
        transform: translateY(90vh) translateX(10px) scale(1);
    }
    50% {
        transform: translateY(50vh) translateX(-15px) scale(1.2);
    }
    90% {
        opacity: 1;
        transform: translateY(10vh) translateX(20px) scale(1);
    }
    100% {
        transform: translateY(-10vh) translateX(0) scale(0);
        opacity: 0;
    }
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 20px;
    position: relative;
    z-index: 2;
}

.hero-content {
    max-width: 800px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    color: white;
    text-shadow: 0 0 20px rgba(59, 130, 246, 0.5);
    animation: titleGlow 3s ease-in-out infinite alternate;
}

@keyframes titleGlow {
    0% {
        text-shadow: 0 0 20px rgba(59, 130, 246, 0.5);
    }
    100% {
        text-shadow: 0 0 30px rgba(59, 130, 246, 0.8), 0 0 40px rgba(37, 99, 235, 0.6);
    }
}

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.7;
    max-width: 700px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

/* 介紹區塊 */
.intro-section {
    padding: 5rem 0;
    background: var(--bg-white);
}

.intro-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.intro-text {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-gray);
}

.intro-text p {
    margin-bottom: 1.5rem;
}

.intro-text p:last-child {
    margin-bottom: 0;
}

.intro-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.image-placeholder-large {
    width: 100%;
    max-width: 500px;
    height: 400px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: var(--shadow-lg);
}

.image-placeholder-large i {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.image-placeholder-large span {
    font-size: 1.1rem;
    font-weight: 500;
}

/* 區塊標題 */
.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.section-title p {
    font-size: 1.1rem;
    color: var(--text-gray);
}

/* 應用案例區塊 */
.use-cases-section {
    padding: 5rem 0;
    background: var(--bg-light);
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.use-case-item {
    background: var(--bg-white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.use-case-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.use-case-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    display: flex;
    align-items: center;
    justify-content: center;
}

.use-case-image .image-placeholder {
    color: white;
    text-align: center;
}

.use-case-image .image-placeholder i {
    font-size: 3rem;
}

.use-case-content {
    padding: 2rem;
}

.use-case-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.use-case-content ul {
    list-style: none;
    padding: 0;
}

.use-case-content ul li {
    color: var(--text-gray);
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.6;
}

.use-case-content ul li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
    font-size: 1.2rem;
}

/* 技術服務區塊 */
.technology-section {
    padding: 5rem 0;
    background: var(--bg-white);
}

.technology-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.tech-item {
    background: var(--bg-white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.tech-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.tech-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    display: flex;
    align-items: center;
    justify-content: center;
}

.tech-image .image-placeholder {
    color: white;
    text-align: center;
}

.tech-image .image-placeholder i {
    font-size: 3rem;
}

.tech-content {
    padding: 2rem;
}

.tech-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.tech-content p {
    color: var(--text-gray);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.read-more-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    font-size: 0.95rem;
}

.read-more-link:hover {
    gap: 1rem;
    color: var(--secondary-color);
}

.read-more-link i {
    transition: transform 0.3s ease;
}

.read-more-link:hover i {
    transform: translateX(5px);
}

/* 聯絡我們 */
.contact-section {
    padding: 5rem 0;
    background: var(--bg-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
}

.contact-item i {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.contact-item h4 {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.contact-item p {
    color: var(--text-gray);
}

.contact-form {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
    background: var(--bg-white);
    color: var(--text-dark);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.btn {
    padding: 0.875rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-family: inherit;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* 頁腳 */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.75rem;
}

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 0.95rem;
}

.footer-section ul li a:hover {
    color: white;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

/* 響應式設計 */
@media (max-width: 968px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--bg-white);
        width: 100%;
        text-align: left;
        transition: 0.3s;
        box-shadow: var(--shadow-lg);
        padding: 2rem;
        border-top: 1px solid var(--border-color);
        gap: 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu > li {
        width: 100%;
        padding: 0.75rem 0;
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-menu > li:last-child {
        border-bottom: none;
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        margin-top: 0.5rem;
        padding-left: 1rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .intro-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .use-cases-grid {
        grid-template-columns: 1fr;
    }
    
    .technology-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .section-title h2 {
        font-size: 2rem;
    }
}

@media (max-width: 640px) {
    .hero {
        min-height: 60vh;
        padding-top: 70px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .intro-section,
    .use-cases-section,
    .technology-section,
    .contact-section {
        padding: 3rem 0;
    }
    
    .image-placeholder-large {
        height: 300px;
    }
    
    .image-placeholder-large i {
        font-size: 3rem;
    }
    
    .contact-form {
        padding: 1.5rem;
    }
}

/* 圖片佔位符 */
.image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.image-placeholder i {
    font-size: 2rem;
}