/* ============================================
   翼亞科技 — Modern Landing Page
   ============================================ */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@300;400;500;700;900&display=swap');

:root {
    --bg-primary: #0b0f1a;
    --bg-secondary: #111827;
    --bg-card: #1a2235;
    --bg-card-hover: #212d45;
    --accent: #22d3ee;
    --accent-green: #34d399;
    --accent-purple: #a78bfa;
    --accent-orange: #fb923c;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: rgba(255,255,255,0.06);
    --glow: 0 0 40px rgba(34,211,238,0.15);
    --transition: all 0.35s cubic-bezier(.4,0,.2,1);
}

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

html { scroll-behavior: smooth; }

body {
    font-family: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

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

/* ============================================
   NAVBAR
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    background: rgba(11,15,26,0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 1.3rem;
    letter-spacing: -0.02em;
}

.logo-mark {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--accent), var(--accent-green));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 1.1rem;
    color: var(--bg-primary);
}

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

.nav-link {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

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

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

/* ============================================
   HERO
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-top: 72px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -40%;
    left: -20%;
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(34,211,238,0.08) 0%, transparent 70%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    right: -15%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(52,211,153,0.06) 0%, transparent 70%);
    pointer-events: none;
}

.hero-inner {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 820px;
    padding: 0 24px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(34,211,238,0.1);
    border: 1px solid rgba(34,211,238,0.2);
    color: var(--accent);
    padding: 6px 18px;
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 2rem;
    animation: fadeUp 0.8s ease-out;
}

.hero-title {
    font-size: clamp(2.4rem, 6vw, 4.2rem);
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    letter-spacing: -0.03em;
    animation: fadeUp 0.8s ease-out 0.1s both;
}

.hero-title .gradient-text {
    background: linear-gradient(135deg, var(--accent), var(--accent-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 2.5rem;
    line-height: 1.8;
    animation: fadeUp 0.8s ease-out 0.2s both;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeUp 0.8s ease-out 0.3s both;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-green));
    color: var(--bg-primary);
    box-shadow: 0 4px 20px rgba(34,211,238,0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(34,211,238,0.35);
}

.btn-ghost {
    background: rgba(255,255,255,0.05);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-ghost:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.15);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 10px 22px;
    font-size: 0.9rem;
    border-radius: 10px;
}

/* ============================================
   SECTION SHARED
   ============================================ */
section {
    padding: 100px 0;
}

.section-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
}

.section-label::before {
    content: '';
    width: 24px;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 560px;
    line-height: 1.8;
}

.section-header {
    margin-bottom: 4rem;
}

.section-header.center {
    text-align: center;
}

.section-header.center .section-desc {
    margin: 0 auto;
}

/* ============================================
   PRODUCTS
   ============================================ */
.products {
    background: var(--bg-secondary);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.product-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 36px 32px;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--card-accent);
    opacity: 0;
    transition: var(--transition);
}

.product-card:hover {
    transform: translateY(-6px);
    border-color: rgba(255,255,255,0.1);
    box-shadow: var(--glow);
}

.product-card:hover::before {
    opacity: 1;
}

.product-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    background: var(--icon-bg);
    color: var(--icon-color);
}

.product-card:nth-child(1) {
    --card-accent: var(--accent);
    --icon-bg: rgba(34,211,238,0.12);
    --icon-color: var(--accent);
}

.product-card:nth-child(2) {
    --card-accent: var(--accent-green);
    --icon-bg: rgba(52,211,153,0.12);
    --icon-color: var(--accent-green);
}

.product-card:nth-child(3) {
    --card-accent: var(--accent-purple);
    --icon-bg: rgba(167,139,250,0.12);
    --icon-color: var(--accent-purple);
}

.product-name {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 0.3rem;
}

.product-tagline {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.product-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 2rem;
}

.tag {
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 4px 14px;
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 500;
}

.product-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--card-accent);
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
    margin-top: auto;
}

.product-link:hover {
    gap: 10px;
}

.product-link .arrow {
    transition: var(--transition);
}

/* ============================================
   ABOUT / MISSION
   ============================================ */
.about {
    position: relative;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-visual {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 28px 24px;
    text-align: center;
    transition: var(--transition);
}

.stat-card:hover {
    border-color: rgba(255,255,255,0.12);
    transform: translateY(-4px);
}

.stat-card:nth-child(1) { --stat-color: var(--accent); }
.stat-card:nth-child(2) { --stat-color: var(--accent-green); }
.stat-card:nth-child(3) { --stat-color: var(--accent-purple); }
.stat-card:nth-child(4) { --stat-color: var(--accent-orange); }

.stat-number {
    font-size: 2.4rem;
    font-weight: 900;
    color: var(--stat-color);
    margin-bottom: 4px;
    letter-spacing: -0.03em;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* ============================================
   FEATURES / WHY US
   ============================================ */
.features {
    background: var(--bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 32px 28px;
    transition: var(--transition);
}

.feature-card:hover {
    border-color: rgba(255,255,255,0.1);
    transform: translateY(-4px);
}

.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    margin-bottom: 1.2rem;
}

.feature-card:nth-child(1) .feature-icon { background: rgba(34,211,238,0.12); color: var(--accent); }
.feature-card:nth-child(2) .feature-icon { background: rgba(52,211,153,0.12); color: var(--accent-green); }
.feature-card:nth-child(3) .feature-icon { background: rgba(167,139,250,0.12); color: var(--accent-purple); }
.feature-card:nth-child(4) .feature-icon { background: rgba(251,146,60,0.12); color: var(--accent-orange); }
.feature-card:nth-child(5) .feature-icon { background: rgba(34,211,238,0.12); color: var(--accent); }
.feature-card:nth-child(6) .feature-icon { background: rgba(52,211,153,0.12); color: var(--accent-green); }

.feature-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.6rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ============================================
   CTA
   ============================================ */
.cta {
    position: relative;
    text-align: center;
    padding: 100px 0;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(34,211,238,0.06) 0%, rgba(52,211,153,0.04) 100%);
    pointer-events: none;
}

.cta-inner {
    position: relative;
    z-index: 2;
    max-width: 640px;
    margin: 0 auto;
}

.cta-title {
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.cta-desc {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 2rem;
    line-height: 1.8;
}

/* ============================================
   CONTACT
   ============================================ */
.contact {
    background: var(--bg-secondary);
}

.contact-wrapper {
    max-width: 640px;
    margin: 0 auto;
    text-align: center;
}

.contact-email-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 48px 40px;
    margin-top: 2rem;
}

.contact-email-box .email-label {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    font-weight: 500;
}

.contact-email-box .email-address {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.contact-email-box .email-address:hover {
    color: var(--accent-green);
}

.contact-email-box .email-note {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 1.2rem;
    line-height: 1.7;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    border-top: 1px solid var(--border);
    padding: 48px 0 32px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-brand {
    max-width: 300px;
}

.footer-brand .logo {
    margin-bottom: 1rem;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.85rem;
    line-height: 1.7;
}

.footer-links {
    display: flex;
    gap: 4rem;
}

.footer-col h4 {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

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

.footer-col li {
    margin-bottom: 0.6rem;
}

.footer-col a {
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: var(--transition);
}

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

.footer-bottom {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    color: var(--text-muted);
    font-size: 0.8rem;
}

.footer-bottom-links {
    display: flex;
    gap: 1.5rem;
}

.footer-bottom-links a {
    color: var(--text-muted);
    transition: var(--transition);
}

.footer-bottom-links a:hover {
    color: var(--text-secondary);
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
    .products-grid,
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(11,15,26,0.98);
        backdrop-filter: blur(20px);
        padding: 24px;
        gap: 0;
        border-bottom: 1px solid var(--border);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        width: 100%;
    }

    .nav-link {
        display: block;
        padding: 14px 0;
        border-bottom: 1px solid var(--border);
        font-size: 1rem;
    }

    section {
        padding: 64px 0;
    }

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

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .footer-content {
        flex-direction: column;
    }

    .footer-links {
        flex-direction: column;
        gap: 2rem;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .contact-email-box {
        padding: 32px 24px;
    }

    .contact-email-box .email-address {
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

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

    .stat-card {
        padding: 20px 16px;
    }

    .stat-number {
        font-size: 1.8rem;
    }
}