/* ============================================
   歐普特資訊 - 公司官網樣式表
   ============================================ */

:root {
    --primary: #1a237e;
    --primary-light: #283593;
    --primary-dark: #0d1542;
    --accent: #00bcd4;
    --accent-light: #4dd0e1;
    --dark: #1a1a2e;
    --gray: #6c757d;
    --light-gray: #f8f9fa;
    --white: #ffffff;
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-hover: 0 8px 32px rgba(0,0,0,0.12);
    --radius: 12px;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--dark);
    line-height: 1.7;
    overflow-x: hidden;
    background: var(--white);
    background-image: url('bg_circuit.svg');
    background-attachment: fixed;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========== Navigation ========== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0,0,0,0.05);
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--primary);
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-icon {
    font-size: 1.5rem;
    color: var(--accent);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark);
    font-size: 0.95rem;
    font-weight: 500;
    position: relative;
    padding-bottom: 4px;
    transition: var(--transition);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: var(--transition);
}

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

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

/* Language Switch */
.lang-switch {
    margin-left: 8px;
}
.lang-btn {
    display: inline-block;
    padding: 4px 14px !important;
    border: 2px solid var(--accent) !important;
    border-radius: 20px !important;
    font-size: 0.85rem !important;
    font-weight: 700 !important;
    color: var(--accent) !important;
    transition: var(--transition);
}
.lang-btn::after { display: none !important; }
.lang-btn:hover {
    background: var(--accent) !important;
    color: var(--white) !important;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--dark);
    border-radius: 2px;
    transition: var(--transition);
}

/* ========== Hero Section ========== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
    overflow: hidden;
    padding-top: 72px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(0,188,212,0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(0,188,212,0.1) 0%, transparent 50%),
        url('bg_hero.svg');
    background-size: auto, auto, cover;
    background-position: center;
    opacity: 0.6;
}

.hero-shapes {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.06;
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: var(--accent);
    top: -100px;
    right: -100px;
    animation: float 8s ease-in-out infinite;
}

.shape-2 {
    width: 250px;
    height: 250px;
    background: var(--white);
    bottom: 50px;
    left: -80px;
    animation: float 10s ease-in-out infinite reverse;
}

.shape-3 {
    width: 150px;
    height: 150px;
    background: var(--accent);
    top: 40%;
    right: 10%;
    animation: float 6s ease-in-out infinite 2s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, -30px) scale(1.1); }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 60px 0;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--white);
    margin-bottom: 8px;
    letter-spacing: 2px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--accent);
    font-weight: 400;
    margin-bottom: 24px;
    letter-spacing: 4px;
}

.hero-desc {
    font-size: 1.15rem;
    color: rgba(255,255,255,0.7);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    padding: 14px 36px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-family: inherit;
}

.btn-primary {
    background: var(--accent);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(0,188,212,0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,188,212,0.5);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255,255,255,0.3);
}

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* ========== Section Common ========== */

.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 6px 20px;
    background: rgba(0,188,212,0.1);
    color: var(--accent);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
}

.section-desc {
    font-size: 1.05rem;
    color: var(--gray);
    max-width: 600px;
    margin: 0 auto;
}

/* ========== About Section ========== */

.about {
    background: var(--white);
    background-image: url('bg_circuit.svg');
    background-attachment: fixed;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-content h3 {
    font-size: 1.5rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.about-content p {
    color: var(--gray);
    margin-bottom: 16px;
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 36px;
}

.stat {
    text-align: center;
    padding: 24px 16px;
    background: var(--light-gray);
    border-radius: var(--radius);
    transition: var(--transition);
}

.stat:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 900;
    color: var(--accent);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--gray);
    margin-top: 4px;
}

.about-image {
    display: flex;
    justify-content: center;
}

.about-img-placeholder {
    width: 100%;
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    color: var(--white);
    font-size: 1rem;
    opacity: 0.9;
}

.placeholder-icon {
    font-size: 4rem;
}

/* ========== Services Section ========== */

.services {
    background: var(--light-gray);
    background-image: url('bg_circuit.svg');
    background-attachment: fixed;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background: var(--white);
    padding: 40px 32px;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border-bottom: 3px solid transparent;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-bottom-color: var(--accent);
}

.service-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.service-card h3 {
    font-size: 1.2rem;
    color: var(--primary);
    margin-bottom: 12px;
}

.service-card p {
    color: var(--gray);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ========== Products Section ========== */

.products {
    background: var(--white);
    background-image: url('bg_circuit.svg');
    background-attachment: fixed;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.product-card {
    background: var(--white);
    border: 1px solid #e8e8e8;
    padding: 40px 32px;
    border-radius: var(--radius);
    text-align: center;
    position: relative;
    transition: var(--transition);
}

.product-card:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
}

.product-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    background: linear-gradient(135deg, #ff6b6b, #ee5a24);
    color: var(--white);
    padding: 4px 16px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
}

.product-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.product-card h3 {
    font-size: 1.2rem;
    color: var(--primary);
    margin-bottom: 12px;
}

.product-card p {
    color: var(--gray);
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 20px;
}

.product-features {
    list-style: none;
    text-align: left;
}

.product-features li {
    padding: 8px 0;
    color: var(--gray);
    font-size: 0.9rem;
    position: relative;
    padding-left: 24px;
}

.product-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 700;
}

/* ========== Contact Section ========== */

.contact {
    background: var(--light-gray);
    background-image: url('bg_circuit.svg');
    background-attachment: fixed;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 50px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact-icon {
    font-size: 1.5rem;
    width: 48px;
    height: 48px;
    min-width: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,188,212,0.1);
    border-radius: 12px;
}

.contact-item h4 {
    font-size: 1rem;
    color: var(--primary);
    margin-bottom: 4px;
}

.contact-item p {
    color: var(--gray);
    font-size: 0.95rem;
}

.contact-item a {
    color: var(--accent);
    text-decoration: none;
    transition: var(--transition);
}

.contact-item a:hover {
    color: var(--primary);
}

.contact-form {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 1.5px solid #e8e8e8;
    border-radius: 10px;
    font-size: 0.95rem;
    font-family: inherit;
    transition: var(--transition);
    background: var(--light-gray);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    background: var(--white);
    box-shadow: 0 0 0 3px rgba(0,188,212,0.1);
}

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

/* ========== Footer ========== */

.footer {
    background: var(--primary-dark);
    color: rgba(255,255,255,0.8);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-brand .logo {
    color: var(--white);
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 0.9rem;
    line-height: 1.8;
    opacity: 0.7;
}

.footer h4 {
    color: var(--white);
    font-size: 1rem;
    margin-bottom: 20px;
    font-weight: 600;
}

.footer ul {
    list-style: none;
}

.footer ul li {
    margin-bottom: 10px;
}

.footer ul li a {
    color: rgba(255,255,255,0.6);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer ul li a:hover {
    color: var(--accent);
}

.footer-contact p {
    font-size: 0.9rem;
    margin-bottom: 8px;
    opacity: 0.7;
}

.footer-bottom {
    text-align: center;
    padding: 24px 0;
    font-size: 0.85rem;
    opacity: 0.6;
}

/* ========== Responsive ========== */

@media (max-width: 992px) {
    .hero-title { font-size: 2.5rem; }
    .about-grid { grid-template-columns: 1fr; }
    .services-grid { grid-template-columns: 1fr 1fr; }
    .products-grid { grid-template-columns: 1fr 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 20px 24px;
        box-shadow: var(--shadow);
        gap: 16px;
    }
    
    .nav-links.active { display: flex; }
    .hamburger { display: flex; }
    
    .hero-title { font-size: 2rem; }
    .hero-subtitle { font-size: 1rem; }
    .hero-desc { font-size: 1rem; }
    
    .section { padding: 60px 0; }
    .section-title { font-size: 1.75rem; }
    
    .services-grid { grid-template-columns: 1fr; }
    .products-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .about-stats { grid-template-columns: 1fr; }
    
    .contact-form { padding: 24px; }
    
    .lang-switch { margin-left: 0; }
    .lang-btn {
        display: inline-block !important;
        width: auto !important;
        padding: 4px 14px !important;
    }
}