/* ========== Reset & Base ========== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: #334155;
    background: #f8fafc;
    line-height: 1.6;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ========== Navbar ========== */
.navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    padding: 16px 0;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}
.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    padding: 10px 0;
    box-shadow: 0 2px 20px rgba(0,0,0,0.08);
}
.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-size: 22px; font-weight: 700; }
.logo-icon { font-size: 28px; }
.logo-text { color: #1e293b; }
.logo-text .accent { color: #2563eb; }
.nav-links { display: flex; gap: 32px; }
.nav-link {
    color: #64748b; font-size: 15px; font-weight: 500;
    transition: color 0.3s; position: relative;
}
.nav-link:hover, .nav-link.active { color: #2563eb; }
.nav-link::after {
    content: ''; position: absolute; bottom: -4px; left: 0; right: 0;
    height: 2px; background: #2563eb; transform: scaleX(0);
    transition: transform 0.3s;
}
.nav-link:hover::after, .nav-link.active::after { transform: scaleX(1); }
.nav-actions { display: flex; align-items: center; gap: 16px; }
.nav-phone {
    display: flex; align-items: center; gap: 6px;
    color: #2563eb; font-weight: 600; font-size: 15px;
}
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span {
    display: block; width: 24px; height: 2px; background: #1e293b;
    margin: 5px 0; transition: all 0.3s;
}

/* ========== Hero ========== */
.hero {
    position: relative; min-height: 100vh;
    display: flex; align-items: center; justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, #eff6ff 0%, #f0fdf4 50%, #fefce8 100%);
}
.hero-bg {
    position: absolute; inset: 0;
}
.hero-particles {
    position: absolute; inset: 0;
    background: radial-gradient(ellipse at 20% 50%, rgba(37, 99, 235, 0.06) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 20%, rgba(16, 185, 129, 0.06) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 80%, rgba(245, 158, 11, 0.04) 0%, transparent 50%);
}
.hero-gradient {
    position: absolute; inset: 0;
    background: linear-gradient(180deg, transparent 0%, #f8fafc 100%);
}
.hero-content {
    position: relative; z-index: 2;
    text-align: center; padding: 0 24px;
}
.hero-badge {
    display: inline-block; padding: 8px 20px;
    background: rgba(37, 99, 235, 0.08);
    border: 1px solid rgba(37, 99, 235, 0.15);
    border-radius: 50px; font-size: 14px; color: #2563eb;
    margin-bottom: 24px;
}
.hero-title { margin-bottom: 20px; }
.hero-title .line1 {
    display: block; font-size: clamp(36px, 6vw, 72px);
    font-weight: 900; color: #1e293b;
    letter-spacing: -1px;
}
.hero-title .line2 {
    display: block; font-size: clamp(28px, 4vw, 52px);
    font-weight: 300; color: #64748b;
    margin-top: 8px;
}
.hero-desc {
    font-size: clamp(14px, 1.8vw, 18px); color: #64748b;
    max-width: 600px; margin: 0 auto 36px;
}
.hero-actions { display: flex; gap: 16px; justify-content: center; margin-bottom: 48px; }
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 14px 32px; border-radius: 12px;
    font-size: 16px; font-weight: 600;
    transition: all 0.3s; cursor: pointer; border: none;
}
.btn-primary {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    color: #fff; box-shadow: 0 8px 30px rgba(37, 99, 235, 0.25);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(37, 99, 235, 0.35);
}
.btn-outline {
    background: transparent; color: #2563eb;
    border: 2px solid rgba(37, 99, 235, 0.3);
}
.btn-outline:hover {
    border-color: #2563eb; background: rgba(37, 99, 235, 0.05);
}
.btn-sm { padding: 10px 24px; font-size: 14px; border-radius: 8px; }
.btn-block { width: 100%; justify-content: center; }

.hero-stats {
    display: flex; gap: 48px; justify-content: center;
    flex-wrap: wrap;
}
.stat-item { text-align: center; }
.stat-num {
    font-size: 40px; font-weight: 900; color: #2563eb;
    line-height: 1;
}
.stat-suffix { font-size: 24px; font-weight: 700; color: #2563eb; }
.stat-label { display: block; font-size: 13px; color: #64748b; margin-top: 4px; }

.hero-scroll {
    position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%);
    display: flex; flex-direction: column; align-items: center; gap: 8px;
    color: #94a3b8; font-size: 12px;
}
.scroll-indicator {
    width: 24px; height: 40px; border: 2px solid #cbd5e1;
    border-radius: 12px; position: relative;
}
.scroll-indicator::after {
    content: ''; position: absolute; top: 8px; left: 50%;
    transform: translateX(-50%); width: 4px; height: 8px;
    background: #2563eb; border-radius: 2px;
    animation: scrollDown 1.5s infinite;
}
@keyframes scrollDown {
    0% { opacity: 1; top: 8px; }
    100% { opacity: 0; top: 20px; }
}

/* ========== Sections ========== */
.section { padding: 100px 0; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-tag {
    display: inline-block; padding: 6px 16px;
    background: rgba(37, 99, 235, 0.08);
    border-radius: 50px; font-size: 13px; font-weight: 600;
    color: #2563eb; margin-bottom: 16px;
}
.section-title {
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 800; color: #1e293b; margin-bottom: 12px;
}
.section-desc { font-size: 16px; color: #64748b; max-width: 500px; margin: 0 auto; }

/* ========== Products ========== */
.products-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.product-card {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 16px; overflow: hidden;
    transition: all 0.4s ease;
}
.product-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0,0,0,0.08);
    border-color: rgba(37, 99, 235, 0.2);
}
.product-image { position: relative; height: 220px; overflow: hidden; }
.product-placeholder {
    width: 100%; height: 100%;
    display: flex; align-items: center; justify-content: center;
    transition: transform 0.5s;
}
.product-card:hover .product-placeholder { transform: scale(1.05); }
.product-overlay {
    position: absolute; inset: 0;
    background: rgba(37, 99, 235, 0.85);
    display: flex; align-items: center; justify-content: center;
    opacity: 0; transition: opacity 0.3s;
}
.product-card:hover .product-overlay { opacity: 1; }
.product-info { padding: 20px; }
.product-info h3 { font-size: 18px; font-weight: 700; color: #1e293b; margin-bottom: 8px; }
.product-info p { font-size: 14px; color: #64748b; margin-bottom: 12px; }
.product-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.product-tags span {
    padding: 4px 10px; background: rgba(37, 99, 235, 0.06);
    border-radius: 6px; font-size: 12px; color: #2563eb;
}

/* ========== Advantages ========== */
.advantages { background: #f1f5f9; }
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.adv-card {
    text-align: center; padding: 40px 24px;
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 16px;
    transition: all 0.3s;
}
.adv-card:hover {
    transform: translateY(-4px);
    border-color: rgba(37, 99, 235, 0.2);
    box-shadow: 0 12px 40px rgba(0,0,0,0.06);
}
.adv-icon { font-size: 48px; margin-bottom: 16px; }
.adv-card h3 { font-size: 18px; font-weight: 700; color: #1e293b; margin-bottom: 8px; }
.adv-card p { font-size: 14px; color: #64748b; }

/* ========== Cases ========== */
.cases-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.case-card { border-radius: 16px; overflow: hidden; }
.case-image {
    height: 280px; position: relative;
    display: flex; align-items: flex-end;
    transition: transform 0.4s;
}
.case-card:hover .case-image { transform: scale(1.02); }
.case-overlay {
    width: 100%; padding: 24px;
    background: linear-gradient(transparent, rgba(0,0,0,0.7));
}
.case-category {
    display: inline-block; padding: 4px 12px;
    background: rgba(37, 99, 235, 0.9);
    border-radius: 6px; font-size: 12px; font-weight: 600;
    color: #fff; margin-bottom: 8px;
}
.case-overlay h3 { font-size: 18px; font-weight: 700; color: #fff; margin-bottom: 4px; }
.case-overlay p { font-size: 13px; color: #e2e8f0; }

/* ========== Process ========== */
.process-timeline {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
    position: relative;
}
.process-timeline::before {
    content: ''; position: absolute; top: 40px; left: 60px; right: 60px;
    height: 2px; background: rgba(37, 99, 235, 0.15);
}
.process-step { text-align: center; position: relative; }
.step-num {
    width: 80px; height: 80px; margin: 0 auto 20px;
    background: rgba(37, 99, 235, 0.08);
    border: 2px solid rgba(37, 99, 235, 0.2);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 24px; font-weight: 900; color: #2563eb;
    position: relative; z-index: 2;
}
.step-content h3 { font-size: 18px; font-weight: 700; color: #1e293b; margin-bottom: 8px; }
.step-content p { font-size: 14px; color: #64748b; }

/* ========== Contact ========== */
.contact-wrapper {
    display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
}
.contact-info .section-tag { margin-bottom: 12px; }
.contact-info h2 { font-size: 36px; font-weight: 800; color: #1e293b; margin-bottom: 12px; }
.contact-info > p { font-size: 16px; color: #64748b; margin-bottom: 32px; }
.contact-details { display: flex; flex-direction: column; gap: 20px; }
.contact-item { display: flex; align-items: center; gap: 16px; }
.contact-icon { font-size: 28px; }
.contact-label { font-size: 12px; color: #94a3b8; text-transform: uppercase; letter-spacing: 1px; }
.contact-item a, .contact-item span { font-size: 16px; color: #334155; font-weight: 500; }
.contact-item a:hover { color: #2563eb; }

.contact-form-wrap {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 20px; padding: 36px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.04);
}
.form-group { margin-bottom: 16px; }
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 14px 16px;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 10px; color: #334155;
    font-size: 15px; font-family: inherit;
    transition: border-color 0.3s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none; border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}
.form-group select { cursor: pointer; }
.form-group textarea { resize: vertical; min-height: 100px; }
.form-group input::placeholder, .form-group textarea::placeholder { color: #94a3b8; }

/* ========== Footer ========== */
.footer {
    background: #1e293b;
    border-top: none;
    padding: 60px 0 24px;
}
.footer-grid {
    display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px;
    margin-bottom: 40px;
}
.footer-brand p { font-size: 14px; color: #94a3b8; margin-top: 12px; }
.footer-logo { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 700; }
.footer-logo .logo-text { color: #fff; }
.footer-logo .accent { color: #60a5fa; }
.footer-links h4, .footer-contact h4 {
    font-size: 15px; font-weight: 700; color: #f1f5f9; margin-bottom: 16px;
}
.footer-links a {
    display: block; font-size: 14px; color: #94a3b8;
    padding: 4px 0; transition: color 0.3s;
}
.footer-links a:hover { color: #60a5fa; }
.footer-contact p { font-size: 14px; color: #94a3b8; margin-bottom: 8px; }
.footer-contact a { color: #60a5fa; }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding-top: 24px; text-align: center;
}
.footer-bottom p { font-size: 13px; color: #64748b; }

/* ========== Back to Top ========== */
.back-to-top {
    position: fixed; bottom: 32px; right: 32px;
    width: 48px; height: 48px; border-radius: 50%;
    background: #2563eb; color: #fff;
    border: none; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    opacity: 0; visibility: hidden;
    transition: all 0.3s; box-shadow: 0 8px 30px rgba(37, 99, 235, 0.3);
    z-index: 999;
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { transform: translateY(-4px); }

/* ========== AOS-like Animations ========== */
[data-aos] {
    opacity: 0; transform: translateY(30px);
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
[data-aos].aos-animate {
    opacity: 1; transform: translateY(0);
}
[data-aos="fade-down"] { transform: translateY(-30px); }
[data-aos="fade-down"].aos-animate { transform: translateY(0); }
[data-aos="fade-right"] { transform: translateX(-30px); }
[data-aos="fade-right"].aos-animate { transform: translateX(0); }
[data-aos="fade-left"] { transform: translateX(30px); }
[data-aos="fade-left"].aos-animate { transform: translateX(0); }

/* ========== Responsive ========== */
@media (max-width: 1024px) {
    .products-grid { grid-template-columns: repeat(2, 1fr); }
    .adv-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
    .nav-links { display: none; }
    .nav-links.active {
        display: flex; flex-direction: column;
        position: absolute; top: 100%; left: 0; right: 0;
        background: rgba(255, 255, 255, 0.98);
        padding: 20px 24px; gap: 16px;
        border-top: 1px solid #e2e8f0;
        box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    }
    .nav-toggle { display: block; }
    .nav-toggle.active span { background: #1e293b; }
    .nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
    .nav-toggle.active span:nth-child(2) { opacity: 0; }
    .nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }
    .hero-stats { gap: 24px; }
    .stat-num { font-size: 32px; }
    .products-grid { grid-template-columns: 1fr; }
    .adv-grid { grid-template-columns: 1fr; }
    .cases-grid { grid-template-columns: 1fr; }
    .process-timeline { grid-template-columns: 1fr 1fr; }
    .process-timeline::before { display: none; }
    .contact-wrapper { grid-template-columns: 1fr; gap: 40px; }
    .footer-grid { grid-template-columns: 1fr; }
    .hero-actions { flex-direction: column; align-items: center; }
}