/* ===== CSS Variables ===== */
:root {
    --primary: #00D4FF;
    --primary-dark: #0099CC;
    --secondary: #7B61FF;
    --accent: #00F5FF;
    --bg-dark: #0a0a1a;
    --bg-card: #111128;
    --bg-card-hover: #1a1a3e;
    --text-primary: #ffffff;
    --text-secondary: #a0a0c0;
    --text-muted: #6a6a8e;
    --border: rgba(0, 212, 255, 0.15);
    --glow: 0 0 20px rgba(0, 212, 255, 0.3);
    --radius: 16px;
    --radius-sm: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Reset & Base ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}
a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width: 100%; display: block; }
ul { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== Particles Canvas ===== */
#particles {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    z-index: 0; pointer-events: none;
}

/* ===== Gradient Text ===== */
.gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 14px 32px; border-radius: 50px; font-size: 16px; font-weight: 500;
    cursor: pointer; border: none; transition: var(--transition);
}
.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff; box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(0, 212, 255, 0.5); }
.btn-outline {
    background: transparent; color: var(--primary);
    border: 2px solid var(--primary);
}
.btn-outline:hover { background: var(--primary); color: var(--bg-dark); }
.btn-full { width: 100%; justify-content: center; }

/* ===== Navbar ===== */
.navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    padding: 16px 0; transition: var(--transition);
}
.navbar.scrolled {
    background: rgba(10, 10, 26, 0.95); backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border); padding: 10px 0;
}
.nav-container {
    max-width: 1200px; margin: 0 auto; padding: 0 24px;
    display: flex; align-items: center; justify-content: space-between;
}
.nav-logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 20px; }
.nav-logo img { width: 36px; height: 36px; border-radius: 8px; }
.nav-menu { display: flex; gap: 32px; }
.nav-link {
    font-size: 15px; color: var(--text-secondary); position: relative; padding: 4px 0;
}
.nav-link::after {
    content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transition: width 0.3s;
}
.nav-link:hover, .nav-link.active { color: var(--primary); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.nav-cta {
    padding: 10px 24px; border-radius: 50px; font-size: 14px; font-weight: 500;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
}
.nav-cta:hover { box-shadow: var(--glow); transform: translateY(-1px); }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; }
.hamburger span { width: 24px; height: 2px; background: var(--text-primary); transition: var(--transition); }

/* ===== Hero ===== */
.hero {
    position: relative; min-height: 100vh; display: flex; align-items: center;
    justify-content: center; text-align: center; overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.hero-overlay {
    position: absolute; inset: 0;
    background: linear-gradient(180deg, rgba(10,10,26,0.7) 0%, rgba(10,10,26,0.85) 50%, var(--bg-dark) 100%);
}
.hero-content { position: relative; z-index: 2; padding: 120px 24px 80px; }
.hero-badge {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 8px 20px; border-radius: 50px; font-size: 14px;
    background: rgba(0, 212, 255, 0.1); border: 1px solid var(--border);
    color: var(--primary); margin-bottom: 24px;
}
.hero-title { font-size: clamp(36px, 6vw, 72px); font-weight: 900; line-height: 1.2; margin-bottom: 24px; }
.hero-desc { font-size: 18px; color: var(--text-secondary); max-width: 600px; margin: 0 auto 40px; line-height: 1.8; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 60px; }
.hero-stats {
    display: flex; gap: 48px; justify-content: center; flex-wrap: wrap;
    padding: 32px; border-radius: var(--radius);
    background: rgba(17, 17, 40, 0.6); backdrop-filter: blur(10px);
    border: 1px solid var(--border); max-width: 700px; margin: 0 auto;
}
.stat-item { text-align: center; }
.stat-number { font-size: 36px; font-weight: 900; color: var(--primary); }
.stat-suffix { font-size: 20px; font-weight: 700; color: var(--primary); }
.stat-label { display: block; font-size: 13px; color: var(--text-muted); margin-top: 4px; }

/* Scroll Indicator */
.scroll-indicator {
    position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%);
    display: flex; flex-direction: column; align-items: center; gap: 8px;
    color: var(--text-muted); font-size: 12px; animation: bounce 2s infinite;
}
.mouse { width: 24px; height: 38px; border: 2px solid var(--text-muted); border-radius: 12px; position: relative; }
.wheel {
    width: 4px; height: 8px; background: var(--primary); border-radius: 2px;
    position: absolute; top: 6px; left: 50%; transform: translateX(-50%);
    animation: scroll-wheel 2s infinite;
}
@keyframes scroll-wheel { 0% { opacity: 1; top: 6px; } 100% { opacity: 0; top: 20px; } }
@keyframes bounce { 0%, 100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(8px); } }

/* ===== Animate In ===== */
.animate-in { opacity: 0; transform: translateY(30px); animation: fadeInUp 0.8s forwards; }
.animate-in:nth-child(2) { animation-delay: 0.15s; }
.animate-in:nth-child(3) { animation-delay: 0.3s; }
.animate-in:nth-child(4) { animation-delay: 0.45s; }
.animate-in:nth-child(5) { animation-delay: 0.6s; }
@keyframes fadeInUp { to { opacity: 1; transform: translateY(0); } }

/* ===== Section Header ===== */
.section-header { text-align: center; margin-bottom: 60px; }
.section-tag {
    display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: 3px;
    color: var(--primary); margin-bottom: 12px; text-transform: uppercase;
}
.section-title { font-size: clamp(28px, 4vw, 42px); font-weight: 900; margin-bottom: 16px; }
.section-desc { font-size: 16px; color: var(--text-secondary); max-width: 500px; margin: 0 auto; }

/* ===== Services ===== */
.services { position: relative; z-index: 1; padding: 120px 0; }
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.service-card {
    position: relative; padding: 40px 32px; border-radius: var(--radius);
    background: var(--bg-card); border: 1px solid var(--border);
    transition: var(--transition); overflow: hidden;
}
.service-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    opacity: 0; transition: var(--transition);
}
.service-card:hover { transform: translateY(-8px); border-color: var(--primary); background: var(--bg-card-hover); }
.service-card:hover::before { opacity: 1; }
.service-card.featured { border-color: var(--primary); background: linear-gradient(135deg, rgba(0,212,255,0.05), rgba(123,97,255,0.05)); }
.service-badge {
    position: absolute; top: 16px; right: 16px; padding: 4px 12px;
    border-radius: 50px; font-size: 12px; font-weight: 600;
    background: linear-gradient(135deg, var(--primary), var(--secondary)); color: #fff;
}
.service-icon {
    width: 56px; height: 56px; border-radius: 14px; display: flex; align-items: center; justify-content: center;
    font-size: 24px; margin-bottom: 20px;
    background: linear-gradient(135deg, rgba(0,212,255,0.15), rgba(123,97,255,0.15));
    color: var(--primary);
}
.service-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.service-card p { font-size: 14px; color: var(--text-secondary); margin-bottom: 16px; line-height: 1.7; }
.service-features { margin-bottom: 20px; }
.service-features li { font-size: 13px; color: var(--text-secondary); padding: 4px 0; display: flex; align-items: center; gap: 8px; }
.service-features li i { color: var(--primary); font-size: 11px; }
.service-link { font-size: 14px; color: var(--primary); display: flex; align-items: center; gap: 6px; }
.service-link:hover { gap: 12px; }

/* ===== Cases ===== */
.cases { position: relative; z-index: 1; padding: 120px 0; }
.cases-grid { display: grid; grid-template-columns: repeat(3, 1fr); grid-auto-rows: 280px; gap: 20px; }
.case-card {
    position: relative; border-radius: var(--radius); overflow: hidden; cursor: pointer;
}
.case-card img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.case-card:hover img { transform: scale(1.1); }
.case-overlay {
    position: absolute; inset: 0; padding: 24px;
    background: linear-gradient(180deg, transparent 30%, rgba(10,10,26,0.95) 100%);
    display: flex; flex-direction: column; justify-content: flex-end;
}
.case-tag {
    display: inline-block; padding: 4px 12px; border-radius: 50px; font-size: 12px;
    background: rgba(0,212,255,0.2); color: var(--primary); margin-bottom: 8px; width: fit-content;
}
.case-overlay h3 { font-size: 18px; font-weight: 700; margin-bottom: 6px; }
.case-overlay p { font-size: 13px; color: var(--text-secondary); }
.case-large { grid-column: span 2; }

/* ===== About ===== */
.about { position: relative; z-index: 1; padding: 120px 0; overflow: hidden; }
.about-bg { position: absolute; inset: 0; }
.about-bg img { width: 100%; height: 100%; object-fit: cover; }
.about-overlay {
    position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(10,10,26,0.95), rgba(10,10,26,0.88));
}
.about-content { position: relative; z-index: 2; display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.about-text p { font-size: 15px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 16px; }
.about-features { margin-top: 32px; display: flex; flex-direction: column; gap: 20px; }
.about-feature { display: flex; align-items: flex-start; gap: 16px; }
.about-feature i {
    width: 44px; height: 44px; border-radius: 12px; display: flex; align-items: center; justify-content: center;
    font-size: 18px; flex-shrink: 0;
    background: linear-gradient(135deg, rgba(0,212,255,0.15), rgba(123,97,255,0.15));
    color: var(--primary);
}
.about-feature h4 { font-size: 16px; font-weight: 600; margin-bottom: 4px; }
.about-feature p { font-size: 13px; color: var(--text-muted); margin: 0; }

/* Tech Stack */
.tech-stack { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.tech-item {
    display: flex; flex-direction: column; align-items: center; gap: 8px;
    padding: 20px; border-radius: var(--radius-sm); text-align: center;
    background: rgba(17,17,40,0.6); border: 1px solid var(--border);
    transition: var(--transition);
}
.tech-item:hover { border-color: var(--primary); transform: translateY(-4px); }
.tech-item i { font-size: 28px; color: var(--primary); }
.tech-item span { font-size: 12px; color: var(--text-muted); }

/* ===== Contact ===== */
.contact { position: relative; z-index: 1; padding: 120px 0; }
.contact-wrapper { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; align-items: flex-start; }
.contact-info { display: flex; flex-direction: column; gap: 24px; }
.contact-item { display: flex; align-items: center; gap: 16px; }
.contact-icon {
    width: 50px; height: 50px; border-radius: 14px; display: flex; align-items: center; justify-content: center;
    font-size: 20px; flex-shrink: 0;
    background: linear-gradient(135deg, rgba(0,212,255,0.15), rgba(123,97,255,0.15));
    color: var(--primary);
}
.contact-item h4 { font-size: 14px; color: var(--text-muted); margin-bottom: 2px; }
.contact-item p { font-size: 16px; font-weight: 500; }
.contact-form {
    padding: 40px; border-radius: var(--radius);
    background: var(--bg-card); border: 1px solid var(--border);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 14px 18px; border-radius: var(--radius-sm);
    border: 1px solid var(--border); background: rgba(10,10,26,0.6);
    color: var(--text-primary); font-size: 14px; font-family: inherit;
    transition: var(--transition); outline: none;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color: var(--primary); box-shadow: 0 0 0 3px rgba(0,212,255,0.1);
}
.form-group select option { background: var(--bg-dark); }
.form-group textarea { resize: vertical; }

/* ===== Footer ===== */
.footer {
    position: relative; z-index: 1; padding: 60px 0 30px;
    border-top: 1px solid var(--border);
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand { display: flex; flex-direction: column; gap: 8px; }
.footer-brand img { width: 40px; height: 40px; border-radius: 10px; }
.footer-brand span { font-size: 18px; font-weight: 700; }
.footer-brand p { font-size: 13px; color: var(--text-muted); }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links h4 { font-size: 14px; font-weight: 600; margin-bottom: 4px; }
.footer-links a { font-size: 13px; color: var(--text-secondary); display: flex; align-items: center; gap: 6px; }
.footer-links a:hover { color: var(--primary); }
.footer-bottom { text-align: center; padding-top: 24px; border-top: 1px solid var(--border); }
.footer-bottom p { font-size: 13px; color: var(--text-muted); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .services-grid { grid-template-columns: repeat(2, 1fr); }
    .cases-grid { grid-template-columns: repeat(2, 1fr); }
    .case-large { grid-column: span 2; }
    .about-content { grid-template-columns: 1fr; }
    .contact-wrapper { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .nav-menu { display: none; }
    .nav-cta { display: none; }
    .hamburger { display: flex; }
    .nav-menu.active {
        display: flex; flex-direction: column; position: absolute;
        top: 100%; left: 0; right: 0; padding: 24px;
        background: rgba(10,10,26,0.98); backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--border);
    }
    .services-grid { grid-template-columns: 1fr; }
    .cases-grid { grid-template-columns: 1fr; }
    .case-large { grid-column: span 1; }
    .hero-stats { flex-direction: column; gap: 24px; }
    .form-row { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .tech-stack { grid-template-columns: repeat(2, 1fr); }
}