:root {
    --primary-dark: #0a0a0a;
    --primary-blue: #0066FF;
}
* { box-sizing: border-box; padding: 0; margin: 0; }
html, body { max-width: 100vw; overflow-x: hidden; font-family: Inter, "Source Han Sans", "PingFang SC", sans-serif; }
body { background: var(--primary-dark); color: #ffffff; min-height: 100vh; display: flex; flex-direction: column; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

/* Navbar */
.navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    background: rgba(10, 10, 10, 0.95); backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255,255,255,0.06);
}
.navbar-inner {
    max-width: 1600px; margin: 0 auto; padding: 0 48px;
    display: flex; align-items: center; justify-content: space-between; height: 80px;
}
.navbar-brand { display: flex; align-items: center; gap: 16px; }
.navbar-brand img { width: 48px; height: 48px; object-fit: contain; border-radius: 8px; }
.navbar-brand span { color: white; font-weight: 600; font-size: 20px; }
.navbar-nav { display: flex; align-items: center; gap: 48px; }
.navbar-nav a { color: rgba(255,255,255,0.6); font-size: 15px; font-weight: 500; transition: color 0.3s; }
.navbar-nav a:hover { color: white; }
.lang-select {
    background: transparent; color: rgba(255,255,255,0.6); font-size: 14px;
    border: 1px solid rgba(255,255,255,0.2); border-radius: 6px; padding: 8px 12px; cursor: pointer;
}
.navbar-toggle { display: none; }

/* Hero */
.hero {
    min-height: 100vh; display: flex; align-items: center; justify-content: center;
    position: relative; overflow: hidden;
}
.hero-bg {
    position: absolute; inset: 0;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a2e 50%, #16213e 100%);
}
.hero-glow {
    position: absolute; inset: 0; pointer-events: none;
}
.hero-glow-1 {
    position: absolute; top: 20%; left: 10%; width: 600px; height: 600px;
    background: radial-gradient(circle, rgba(0,102,255,0.15) 0%, transparent 70%);
    border-radius: 50%; filter: blur(80px);
}
.hero-glow-2 {
    position: absolute; bottom: 20%; right: 10%; width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(0,200,255,0.1) 0%, transparent 70%);
    border-radius: 50%; filter: blur(80px);
}
.hero-content {
    position: relative; z-index: 10; text-align: center; max-width: 1000px; padding: 0 48px;
}
.hero h1 {
    font-size: clamp(3rem, 8vw, 6rem); font-weight: 700; line-height: 1.1;
    background: linear-gradient(135deg, #fff 0%, rgba(255,255,255,0.8) 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; margin-bottom: 32px;
}
.hero h1 span { background: linear-gradient(135deg, var(--primary-blue) 0%, #00d4ff 100%); -webkit-background-clip: text; }
.hero p { font-size: clamp(1.1rem, 2vw, 1.5rem); color: rgba(255,255,255,0.6); margin-bottom: 48px; line-height: 1.6; }
.hero-btn {
    display: inline-flex; align-items: center; gap: 12px;
    padding: 20px 48px; background: var(--primary-blue); color: white;
    font-size: 16px; font-weight: 600; border-radius: 60px; transition: all 0.3s;
}
.hero-btn:hover { background: #0077ee; transform: translateY(-2px); box-shadow: 0 20px 40px rgba(0,102,255,0.3); }

/* Sections */
.section { padding: 120px 48px; }
.section-dark { background: #0a0a0a; }
.section-gradient { background: linear-gradient(180deg, #0a0a0a 0%, #111 100%); }
.section-title { text-align: center; margin-bottom: 80px; }
.section-title h2 { font-size: clamp(2rem, 4vw, 3rem); font-weight: 700; color: white; margin-bottom: 16px; }
.section-title p { color: rgba(255,255,255,0.5); font-size: 1.125rem; }

/* Features Grid */
.features-grid { max-width: 1400px; margin: 0 auto; display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.feature-card {
    background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.08);
    border-radius: 24px; padding: 48px 40px; transition: all 0.4s;
}
.feature-card:hover { background: rgba(255,255,255,0.06); transform: translateY(-8px); }
.feature-icon {
    width: 72px; height: 72px; background: rgba(0,102,255,0.15); border-radius: 20px;
    display: flex; align-items: center; justify-content: center; margin-bottom: 28px;
}
.feature-icon svg { width: 36px; height: 36px; color: var(--primary-blue); }
.feature-card h3 { font-size: 1.5rem; font-weight: 600; color: white; margin-bottom: 16px; }
.feature-card p { color: rgba(255,255,255,0.5); line-height: 1.7; }

/* Product Grid */
.product-grid { max-width: 1400px; margin: 0 auto; display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.product-card { position: relative; border-radius: 24px; overflow: hidden; aspect-ratio: 4/3; display: block; }
.product-card img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s; }
.product-card:hover img { transform: scale(1.08); }
.product-overlay {
    position: absolute; inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0.3) 50%, transparent 100%);
}
.product-info { position: absolute; bottom: 0; left: 0; right: 0; padding: 40px; }
.product-info h3 { font-size: 1.5rem; font-weight: 600; color: white; }

/* Stats */
.stats-grid { max-width: 1000px; margin: 80px auto 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 48px; }
.stat-card { text-align: center; }
.stat-number { font-size: 4rem; font-weight: 700; color: var(--primary-blue); line-height: 1; margin-bottom: 12px; }
.stat-label { color: rgba(255,255,255,0.5); font-size: 1rem; }

/* Values */
.values-list { display: flex; justify-content: center; gap: 32px; flex-wrap: wrap; }
.value-badge {
    padding: 20px 48px; background: rgba(0,102,255,0.1); border: 1px solid rgba(0,102,255,0.3);
    border-radius: 100px; font-size: 1.5rem; font-weight: 600; color: white;
}

/* Content Cards */
.content-max { max-width: 900px; margin: 0 auto; }
.content-card {
    background: rgba(255,255,255,0.02); border: 1px solid rgba(255,255,255,0.06);
    border-radius: 24px; padding: 64px; margin-bottom: 48px;
}
.content-card h2 { font-size: 1.75rem; font-weight: 600; color: white; margin-bottom: 24px; }
.content-card p { color: rgba(255,255,255,0.6); font-size: 1.125rem; line-height: 1.8; margin-bottom: 16px; }
.content-card ol { color: rgba(255,255,255,0.6); font-size: 1.125rem; line-height: 2; padding-left: 24px; }
.content-card li { margin-bottom: 16px; }
.content-card strong { color: white; }

/* Page Header */
.page-header {
    padding: 200px 48px 120px; text-align: center;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a2e 100%); position: relative; overflow: hidden;
}
.page-header::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0;
    background: radial-gradient(ellipse at center top, rgba(0,102,255,0.15) 0%, transparent 60%);
}
.page-header h1 { position: relative; font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 700; color: white; }

/* Contact Cards */
.contact-grid { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.contact-card {
    background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.08);
    border-radius: 24px; padding: 48px 40px; text-align: center;
}
.contact-icon {
    width: 80px; height: 80px; background: rgba(0,102,255,0.15); border-radius: 24px;
    display: flex; align-items: center; justify-content: center; margin: 0 auto 24px;
}
.contact-icon svg { width: 40px; height: 40px; color: var(--primary-blue); }
.contact-card h3 { font-size: 1.25rem; font-weight: 600; color: white; margin-bottom: 12px; }
.contact-card p { color: rgba(255,255,255,0.6); }

/* WeChat QR */
.wechat-section { display: flex; justify-content: center; margin-top: 48px; }
.wechat-card {
    max-width: 360px; padding: 32px;
    background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.08);
    border-radius: 24px; text-align: center;
}
.wechat-qr {
    width: 240px; height: 240px; display: block; margin: 0 auto 20px;
    background: white; border-radius: 12px; padding: 10px; object-fit: contain;
}
.wechat-card h3 { font-size: 1.25rem; font-weight: 600; color: white; margin-bottom: 8px; }
.wechat-card p { color: rgba(255,255,255,0.6); font-size: 14px; }

/* Form */
.form-card { max-width: 700px; margin: 0 auto; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.form-group { margin-bottom: 24px; }
.form-group.full { grid-column: 1 / -1; }
.form-label { display: block; color: rgba(255,255,255,0.7); font-size: 14px; margin-bottom: 10px; }
.form-input {
    width: 100%; padding: 16px 20px; background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1); border-radius: 12px; color: white;
    font-size: 15px; transition: border-color 0.3s;
}
.form-input:focus { outline: none; border-color: var(--primary-blue); }
textarea.form-input { resize: vertical; min-height: 120px; }
.form-checkbox { display: flex; align-items: center; gap: 12px; margin-bottom: 32px; }
.form-checkbox input { width: 20px; height: 20px; accent-color: var(--primary-blue); }
.form-checkbox span { color: rgba(255,255,255,0.6); font-size: 14px; }
.form-submit {
    width: 100%; padding: 20px; background: var(--primary-blue); color: white;
    font-size: 16px; font-weight: 600; border: none; border-radius: 12px;
    cursor: pointer; transition: all 0.3s;
}
.form-submit:hover { background: #0077ee; }

/* Footer */
.footer { background: #080808; border-top: 1px solid rgba(255,255,255,0.06); padding: 80px 48px 40px; }
.footer-grid { max-width: 1400px; margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 64px; }
.footer-brand { display: flex; align-items: center; gap: 16px; margin-bottom: 24px; }
.footer-brand img { width: 48px; height: 48px; object-fit: contain; border-radius: 8px; }
.footer-brand span { color: white; font-weight: 600; font-size: 20px; }
.footer-desc { color: rgba(255,255,255,0.4); font-size: 14px; line-height: 1.7; max-width: 300px; }
.footer h4 { color: white; font-weight: 600; margin-bottom: 24px; font-size: 15px; }
.footer ul { list-style: none; }
.footer li { margin-bottom: 12px; }
.footer a { color: rgba(255,255,255,0.4); font-size: 14px; transition: color 0.3s; }
.footer a:hover { color: white; }
.footer-bottom { max-width: 1400px; margin: 64px auto 0; padding-top: 32px; border-top: 1px solid rgba(255,255,255,0.06); text-align: center; }
.footer-bottom p { color: rgba(255,255,255,0.3); font-size: 14px; }

/* Responsive */
@media (max-width: 1024px) {
    .features-grid, .product-grid, .contact-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .navbar-inner { padding: 0 24px; }
    .navbar-toggle {
        display: block; background: transparent; border: none; cursor: pointer;
        width: 36px; height: 36px; padding: 6px; position: relative; z-index: 102;
    }
    .navbar-toggle span {
        display: block; height: 2px; width: 100%; background: white;
        margin: 5px 0; transition: transform 0.3s, opacity 0.3s; border-radius: 2px;
    }
    .navbar-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .navbar-toggle.open span:nth-child(2) { opacity: 0; }
    .navbar-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
    .navbar-nav {
        display: none; position: fixed; top: 80px; left: 0; right: 0;
        flex-direction: column; align-items: stretch; gap: 0;
        background: rgba(10, 10, 10, 0.98); backdrop-filter: blur(20px);
        padding: 16px 24px 24px; border-bottom: 1px solid rgba(255,255,255,0.06);
    }
    .navbar-nav.open { display: flex; }
    .navbar-nav a {
        font-size: 16px; padding: 16px 0;
        border-bottom: 1px solid rgba(255,255,255,0.06);
    }
    .lang-select { margin-top: 16px; width: 100%; padding: 12px 16px; font-size: 16px; }
    .section { padding: 80px 24px; }
    .features-grid, .product-grid, .contact-grid, .stats-grid { grid-template-columns: 1fr; }
    .form-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 48px; }
    .hero h1 { font-size: 2.5rem; }
    .content-card { padding: 32px 24px; }
}