/* ============================
   领头扬科技 - 蓝白清爽风官网
   ============================ */

:root {
    --primary: #2563eb;
    --primary-light: #3b82f6;
    --primary-dark: #1d4ed8;
    --primary-subtle: #eff6ff;
    --accent: #06b6d4;
    --accent-light: #22d3ee;
    --bg-white: #ffffff;
    --bg-light: #f8fafc;
    --bg-card: #ffffff;
    --bg-card-hover: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --border-focus: rgba(37, 99, 235, 0.2);
    --glow-primary: 0 4px 20px rgba(37, 99, 235, 0.15);
    --glow-primary-strong: 0 4px 30px rgba(37, 99, 235, 0.25);
    --gradient-main: linear-gradient(135deg, #2563eb, #06b6d4);
    --gradient-glow: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(6, 182, 212, 0.08));
    --gradient-header: linear-gradient(135deg, #eef2ff, #ecfeff);
    --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-card: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-card-hover: 0 10px 30px rgba(0,0,0,0.08), 0 4px 8px rgba(0,0,0,0.04);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-white);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }
img { max-width: 100%; }

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

.section {
    padding: 100px 0;
    position: relative;
}

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

.section-tag {
    display: inline-block;
    padding: 6px 18px;
    background: var(--primary-subtle);
    border: 1px solid var(--border-focus);
    border-radius: 20px;
    font-size: 13px;
    color: var(--primary);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.section-title {
    font-size: 40px;
    font-weight: 700;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-main);
    color: #fff;
    box-shadow: var(--glow-primary);
}

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

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary-subtle);
    transform: translateY(-2px);
    box-shadow: var(--glow-primary);
}

.btn-lg { padding: 18px 42px; font-size: 18px; }
.btn-sm { padding: 10px 24px; font-size: 14px; }

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 10px 0;
    box-shadow: 0 1px 8px rgba(0,0,0,0.06);
}

.nav-glow {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary-light), transparent);
    opacity: 0;
    transition: var(--transition);
}

.navbar.scrolled .nav-glow { opacity: 1; }

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 22px;
    font-weight: 700;
    color: #000000;
}

.logo-img {
    height: 80px;
    width: auto;
    display: block;
}

.logo-highlight { color: var(--primary); }

.nav-menu ul {
    display: flex;
    gap: 4px;
}

.nav-menu ul li a {
    padding: 8px 16px;
    font-size: 14px;
    color: var(--text-secondary);
    border-radius: 8px;
    transition: var(--transition);
}

.nav-menu ul li a:hover,
.nav-menu ul li a.active {
    color: var(--primary);
    background: var(--primary-subtle);
}

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

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

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding: 120px 0 60px;
}

.hero-bg-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.hero-bg-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    pointer-events: none;
}

.hero-bg-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.hero-eeg-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: block;
    pointer-events: none;
    opacity: 0.5;
    mix-blend-mode: screen;
}

/* Floating particles (very subtle) */
.hero-particles {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    pointer-events: none;
}

.hero-grid {
    display: none;
}

.hero .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    z-index: 2;
}

.hero-actions {
    justify-content: center;
}

.hero-actions .btn-outline {
    color: #1565c0;
    border-color: rgba(21, 101, 192, 0.5);
}

.hero-actions .btn-outline:hover {
    background: rgba(21, 101, 192, 0.12);
    border-color: #0d47a1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(13, 71, 161, 0.2);
    border: 1px solid rgba(13, 71, 161, 0.3);
    border-radius: 20px;
    font-size: 13px;
    color: #1565c0;
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease;
}

.badge-dot {
    width: 6px; height: 6px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.hero-title {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    color: #0d47a1;
    animation: fadeInUp 0.8s ease 0.1s both;
    -webkit-text-stroke: 1px #ffffff;
    text-shadow: 0 0 8px rgba(255,255,255,0.5), 0 0 16px rgba(255,255,255,0.3);
    position: relative;
    left: 60px;
}

.title-dot { color: #1565c0; }

.hero-highlight {
    background: linear-gradient(135deg, #1565c0, #0d47a1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 18px;
    color: rgba(21, 101, 192, 0.85);
    margin-bottom: 36px;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-actions {
    display: flex;
    gap: 16px;
    animation: fadeInUp 0.8s ease 0.3s both;
}

/* EEG Full-page background - hero-visual no longer needed */
.hero-visual {
    display: none;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(21, 101, 192, 0.5);
    font-size: 12px;
    animation: fadeInUp 1s ease 1s both;
}

.scroll-indicator i { animation: bounceDown 2s infinite; }

.hero-actions .btn-primary {
    box-shadow: 0 4px 15px rgba(13, 71, 161, 0.3);
}

.hero-actions .btn-primary:hover {
    box-shadow: 0 6px 25px rgba(13, 71, 161, 0.4);
}

/* Features */
.features {
    background: var(--bg-light);
    position: relative;
}

.features::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-light), transparent);
    opacity: 0.3;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 40px 28px;
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
    cursor: default;
    box-shadow: var(--shadow-card);
}

.feature-card:hover {
    transform: translateY(-6px);
    border-color: rgba(37, 99, 235, 0.2);
    box-shadow: var(--shadow-card-hover);
    background: var(--bg-card-hover);
}

.feature-hover-glow {
    position: absolute;
    top: -50%; left: -50%;
    width: 200%; height: 200%;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.04), transparent 60%);
    opacity: 0;
    transition: var(--transition);
    pointer-events: none;
}

.feature-card:hover .feature-hover-glow { opacity: 1; }

.feature-icon {
    width: 60px; height: 60px;
    margin: 0 auto 20px;
    background: var(--primary-subtle);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--primary);
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    background: rgba(37, 99, 235, 0.12);
    box-shadow: 0 0 20px rgba(37, 99, 235, 0.12);
}

.feature-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 12px; color: var(--text-primary); }
.feature-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* Tech Preview */
.tech-preview {
    background: linear-gradient(180deg, var(--bg-white) 0%, var(--bg-light) 100%);
    position: relative;
    overflow: hidden;
}

.tech-preview::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(37, 99, 235, 0.04), transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(6, 182, 212, 0.04), transparent 50%);
    pointer-events: none;
}

.tech-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    position: relative;
    z-index: 1;
}

.tech-step {
    text-align: center;
    padding: 32px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    flex: 1;
    max-width: 220px;
    transition: var(--transition);
    box-shadow: var(--shadow-card);
}

.tech-step:hover {
    border-color: rgba(37, 99, 235, 0.2);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
}

.step-icon {
    width: 56px; height: 56px;
    margin: 0 auto 16px;
    background: var(--gradient-main);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    color: #fff;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}

.tech-step h4 { font-size: 16px; font-weight: 600; margin-bottom: 8px; color: var(--text-primary); }
.tech-step p { font-size: 13px; color: var(--text-secondary); line-height: 1.6; }

.tech-arrow {
    font-size: 20px;
    color: var(--primary);
    padding: 0 12px;
    opacity: 0.4;
    animation: pulse 2s infinite;
}

/* Products */
.products-preview {
    background: var(--bg-light);
}

.product-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.product-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 40px;
    transition: var(--transition);
    box-shadow: var(--shadow-card);
}

.product-card:hover {
    border-color: rgba(37, 99, 235, 0.2);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
}

.product-card.main-product {
    border-color: rgba(37, 99, 235, 0.15);
    background: linear-gradient(135deg, var(--bg-card), var(--primary-subtle));
}

.product-tag {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 16px;
    background: var(--primary-subtle);
    color: var(--primary);
    border: 1px solid rgba(37, 99, 235, 0.15);
}

.product-icon { font-size: 36px; color: var(--primary); margin-bottom: 16px; }
.product-card h3 { font-size: 22px; font-weight: 700; margin-bottom: 12px; color: var(--text-primary); }
.product-card > p { font-size: 14px; color: var(--text-secondary); margin-bottom: 24px; }

.product-features { margin-bottom: 24px; }

.product-features li {
    font-size: 14px;
    color: var(--text-secondary);
    padding: 6px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.product-features li i { color: var(--accent); font-size: 12px; }

/* CTA */
.cta {
    background: linear-gradient(135deg, var(--primary-subtle), rgba(6, 182, 212, 0.06));
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    text-align: center;
}

.cta-content h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cta-content p { font-size: 18px; color: var(--text-secondary); margin-bottom: 36px; }

/* Footer */
.footer {
    background: var(--bg-light);
    padding: 60px 0 30px;
    border-top: 1px solid var(--border-color);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand .logo { margin-bottom: 16px; }
.footer-brand .logo-img { height: 32px; }
.footer-brand > p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }
.footer-col h4 { font-size: 16px; font-weight: 600; margin-bottom: 20px; color: var(--text-primary); }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 14px; color: var(--text-secondary); }
.footer-col ul li a:hover { color: var(--primary); padding-left: 4px; }

.footer-contact li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text-secondary);
}

.footer-contact li i { color: var(--primary); width: 16px; }

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 24px;
    text-align: center;
}

.footer-bottom p { font-size: 13px; color: var(--text-muted); }

/* Animations */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 1; }
}

@keyframes bounceDown {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(6px); }
}

/* Page Header */
.page-header {
    padding: 140px 0 60px;
    text-align: center;
    position: relative;
    overflow: hidden;
    background: var(--gradient-header);
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background:
        radial-gradient(circle at 30% 40%, rgba(37, 99, 235, 0.06), transparent 60%),
        radial-gradient(circle at 70% 60%, rgba(6, 182, 212, 0.06), transparent 60%);
    pointer-events: none;
}

.page-header h1 {
    font-size: 44px;
    font-weight: 800;
    margin-bottom: 16px;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-header p {
    font-size: 18px;
    color: var(--text-secondary); max-width: 600px; margin: 0 auto;
}

.page-grid-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background-image:
        linear-gradient(rgba(37, 99, 235, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37, 99, 235, 0.02) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
}

/* About */
.about-intro { background: var(--bg-card); }
.about-content { max-width: 900px; margin: 0 auto; }
.about-content p { font-size: 16px; color: var(--text-secondary); line-height: 1.9; margin-bottom: 20px; }

.about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 48px;
}

.stat-item {
    text-align: center;
    padding: 32px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    transition: var(--transition);
    box-shadow: var(--shadow-card);
}

.stat-item:hover {
    border-color: rgba(37, 99, 235, 0.2);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
}

.stat-number {
    font-size: 20px;
    font-weight: 800;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.stat-label { font-size: 13px; color: var(--text-secondary); line-height: 1.6; }

/* News Grid */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 28px;
}

.news-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-card);
}

.news-card:hover {
    border-color: rgba(37, 99, 235, 0.2);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
}

.news-card-body { padding: 28px; }

.news-tag {
    display: inline-block;
    padding: 4px 12px;
    font-size: 12px;
    border-radius: 8px;
    margin-bottom: 12px;
    background: var(--primary-subtle);
    color: var(--primary);
    border: 1px solid rgba(37, 99, 235, 0.15);
}

.news-card h3 { font-size: 16px; font-weight: 600; margin-bottom: 12px; line-height: 1.5; color: var(--text-primary); }
.news-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* Cooperation */
.cooperation-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.cooperation-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 40px;
    transition: var(--transition);
    box-shadow: var(--shadow-card);
}

.cooperation-card:hover {
    border-color: rgba(37, 99, 235, 0.2);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
}

.cooperation-card .card-icon { font-size: 32px; color: var(--primary); margin-bottom: 16px; }
.cooperation-card h3 { font-size: 20px; font-weight: 600; margin-bottom: 12px; color: var(--text-primary); }
.cooperation-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.8; }

/* Contact */
.contact-info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 700px;
    margin: 0 auto;
}

.contact-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-card);
}

.contact-item:hover { border-color: rgba(37, 99, 235, 0.2); box-shadow: var(--shadow-card-hover); }

.contact-item .contact-icon {
    width: 50px; height: 50px;
    margin: 0 auto 16px;
    background: var(--primary-subtle);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--primary);
}

.contact-item h4 { font-size: 16px; font-weight: 600; margin-bottom: 8px; color: var(--text-primary); }
.contact-item span { font-size: 14px; color: var(--text-secondary); }

/* Technology Detail */
.tech-detail-section { background: var(--bg-card); }
.tech-detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.tech-detail-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 36px;
    transition: var(--transition);
    box-shadow: var(--shadow-card);
}

.tech-detail-card:hover {
    border-color: rgba(37, 99, 235, 0.2);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
}

.tech-detail-card .td-icon { font-size: 28px; color: var(--primary); margin-bottom: 16px; }
.tech-detail-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 12px; color: var(--text-primary); }
.tech-detail-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.8; }

/* Scenarios */
.scenario-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.scenario-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 36px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-card);
}

.scenario-card:hover {
    border-color: rgba(37, 99, 235, 0.2);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
}

.scenario-card .sc-icon { font-size: 28px; color: var(--primary); margin-bottom: 16px; }
.scenario-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 12px; color: var(--text-primary); }
.scenario-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.8; }

/* Product Detail */
.product-detail-section { background: var(--bg-card); }

.product-detail-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 48px;
    margin-bottom: 32px;
    transition: var(--transition);
    box-shadow: var(--shadow-card);
}

.product-detail-card:hover { border-color: rgba(37, 99, 235, 0.15); }

.product-detail-card .pd-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 24px;
}

.product-detail-card .pd-icon {
    width: 56px; height: 56px;
    background: var(--gradient-main);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: #fff;
}

.product-detail-card h3 { font-size: 22px; font-weight: 700; color: var(--text-primary); }
.product-detail-card .pd-desc { font-size: 15px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 24px; }

.product-detail-card ul {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.product-detail-card ul li {
    font-size: 14px; color: var(--text-secondary);
    padding: 6px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.product-detail-card ul li i { color: var(--accent); font-size: 12px; }

/* Partners */
.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 28px;
}

.partner-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    transition: var(--transition);
    box-shadow: var(--shadow-card);
}

.partner-card:hover {
    border-color: rgba(37, 99, 235, 0.2);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
}

.partner-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; color: var(--text-primary); }
.partner-card .partner-role { font-size: 13px; color: var(--primary); margin-bottom: 12px; }
.partner-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* Responsive */
@media (max-width: 1024px) {
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .tech-flow { flex-wrap: wrap; gap: 16px; }
    .tech-arrow { display: none; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .hero .container { grid-template-columns: 1fr; }
    .hero-visual { display: none; }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: fixed;
        top: 70px; left: 0; right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 4px 16px rgba(0,0,0,0.06);
    }

    .nav-menu.active { display: block; }
    .nav-menu ul { flex-direction: column; gap: 0; }
    .nav-menu ul li a { display: block; padding: 14px 16px; }
    .menu-toggle { display: flex; }

    .hero-title { font-size: 36px; }
    .section-title { font-size: 30px; }
    .features-grid { grid-template-columns: 1fr; }
    .product-showcase { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .about-stats { grid-template-columns: repeat(2, 1fr); }
    .cooperation-grid { grid-template-columns: 1fr; }
    .scenario-grid { grid-template-columns: 1fr; }
    .contact-info-grid { grid-template-columns: 1fr; }
    .product-d