/* ===== 浅色工业风 - Dot Matrix 企业网站 ===== */
:root {
    --primary-bg: #ffffff;
    --primary-mid: #f8fafc;
    --section-alt: #f1f5f9;
    --accent-orange: #1e40af;
    --accent-orange-light: #3b82f6;
    --accent-blue: #2563eb;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --card-bg: #ffffff;
    --surface-light: #f8fafc;
    --surface-hover: #f1f5f9;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-card: 0 4px 20px rgba(0,0,0,0.07);
    --gradient-hero: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 50%, #eef2f6 100%);
    --gradient-accent: linear-gradient(135deg, #1e40af, #3b82f6);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: 0.3s ease;
}
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; font-size:16px; }
body {
    font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;
    background:var(--primary-bg); color:var(--text-primary); line-height:1.6;
    -webkit-font-smoothing:antialiased;
}
a { color:var(--accent-orange); text-decoration:none; transition:color var(--transition); }
a:hover { color:var(--accent-orange-light); }
img { max-width:100%; height:auto; }
h1,h2,h3,h4 { font-weight:700; line-height:1.2; color:var(--text-primary); }
.section-title { font-size:2.2rem; margin-bottom:0.5rem; }
.section-subtitle { color:var(--text-secondary); font-size:1.1rem; margin-bottom:3rem; }
.section-padding { padding:5rem 0; }
.container { max-width:1200px; margin:0 auto; padding:0 1.5rem; }

/* --- Navigation --- */
.navbar {
    position:fixed; top:0; left:0; right:0; z-index:1000;
    background:rgba(255,255,255,0.92); backdrop-filter:blur(12px);
    border-bottom:1px solid var(--border-color);
}
.navbar .container { display:flex; align-items:center; justify-content:space-between; height:70px; }
.nav-logo { display:flex; align-items:center; gap:0.75rem; }
.nav-logo:hover { opacity:0.85; }
.nav-links { display:flex; align-items:center; gap:2rem; list-style:none; }
.nav-links a {
    color:var(--text-secondary); font-size:1.05rem; font-weight:600; transition:color var(--transition);
    position:relative;
}
.nav-links a::after {
    content:''; position:absolute; bottom:-4px; left:0; width:0; height:2px;
    background:var(--accent-orange); transition:width var(--transition);
}
.nav-links a:hover, .nav-links a.active { color:var(--text-primary); }
.nav-links a:hover::after, .nav-links a.active::after { width:100%; }
.nav-toggle { display:none; background:none; border:none; cursor:pointer; padding:0.5rem; }
.nav-toggle span { display:block; width:24px; height:2px; background:var(--text-primary); margin:5px 0; transition:var(--transition); border-radius:2px; }

/* --- Hero --- */
.hero {
    min-height:50vh; background:var(--gradient-hero); display:flex; align-items:center;
    position:relative; overflow:hidden; padding-top:70px;
}
.hero::before {
    content:''; position:absolute; inset:0;
    background-image:
        linear-gradient(90deg,rgba(30,64,175,0.04) 1px,transparent 1px),
        linear-gradient(0deg,rgba(30,64,175,0.04) 1px,transparent 1px),
        radial-gradient(circle at 1px 1px,rgba(30,64,175,0.15) 1.5px,transparent 1.5px);
    background-size:60px 60px; pointer-events:none; z-index:0;
}
.hero::after {
    content:''; position:absolute; inset:0; pointer-events:none; z-index:0;
    background-image:
        radial-gradient(ellipse at 18% 35%,rgba(30,64,175,0.10) 0%,transparent 50%),
        radial-gradient(ellipse at 72% 22%,rgba(59,130,246,0.08) 0%,transparent 50%),
        radial-gradient(ellipse at 55% 75%,rgba(30,64,175,0.06) 0%,transparent 50%),
        radial-gradient(ellipse at 88% 65%,rgba(59,130,246,0.05) 0%,transparent 50%);
}
.hero-content { position:relative; z-index:1; max-width:800px; }
.hero-badge {
    display:inline-flex; align-items:center; gap:0.5rem;
    background:rgba(30,64,175,0.1); border:1px solid rgba(30,64,175,0.25);
    color:var(--accent-orange); padding:0.4rem 1rem; border-radius:50px;
    font-size:0.85rem; font-weight:600; margin-bottom:1.5rem;
}
.hero h1 { font-size:3.5rem; margin-bottom:1rem; letter-spacing:-0.02em; }
.hero h1 .highlight {
    background:var(--gradient-accent); -webkit-background-clip:text; -webkit-text-fill-color:transparent;
    background-clip:text;
}
.hero p { font-size:1.2rem; color:var(--text-secondary); margin-bottom:2.5rem; max-width:600px; line-height:1.8; }
.hero-actions { display:flex; gap:1rem; flex-wrap:wrap; }
.btn { display:inline-flex; align-items:center; gap:0.5rem; padding:0.85rem 2rem; border-radius:50px; font-size:1rem; font-weight:600; cursor:pointer; border:none; transition:all var(--transition); text-decoration:none; }
.btn-primary { background:var(--gradient-accent); color:#fff; box-shadow:0 4px 16px rgba(30,64,175,0.25); }
.btn-primary:hover { transform:translateY(-2px); box-shadow:0 6px 24px rgba(30,64,175,0.35); color:#fff; }
.btn-outline { background:transparent; color:var(--text-primary); border:1px solid var(--border-color); }
.btn-outline:hover { border-color:var(--accent-orange); color:var(--accent-orange); transform:translateY(-2px); }

/* --- Sections --- */
.section-alt { background:var(--section-alt); }

/* --- Products Grid --- */
.products-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(340px,1fr)); gap:1.5rem; }
.product-card {
    background:var(--card-bg); border:1px solid var(--border-color); border-radius:var(--radius);
    padding:2rem; transition:all var(--transition); cursor:pointer; position:relative; overflow:hidden;
    box-shadow:var(--shadow-sm);
}
.product-card::before {
    content:''; position:absolute; top:0; left:0; right:0; height:3px;
    background:var(--gradient-accent); transform:scaleX(0); transform-origin:left;
    transition:transform var(--transition);
}
.product-card:hover::before { transform:scaleX(1); }
.product-card:hover { border-color:rgba(30,64,175,0.3); transform:translateY(-4px); box-shadow:var(--shadow-card); }
.product-card .icon-wrapper {
    width:56px; height:56px; background:rgba(30,64,175,0.1); border-radius:var(--radius-sm);
    display:flex; align-items:center; justify-content:center; margin-bottom:1.25rem; font-size:1.5rem;
}
.product-card h3 { font-size:1.4rem; margin-bottom:0.5rem; }
.product-card .product-desc { color:var(--text-secondary); font-size:0.9rem; margin-bottom:1rem; line-height:1.6; }
.product-card .meta { display:flex; gap:1rem; font-size:0.82rem; color:var(--text-muted); margin-bottom:1.25rem; }
.product-card .meta span { display:flex; align-items:center; gap:0.3rem; }
.product-card .card-link { color:var(--accent-orange); font-weight:600; font-size:0.9rem; display:flex; align-items:center; gap:0.4rem; }
.product-card .card-link:hover { gap:0.7rem; }

/* --- Features --- */
.features-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(250px,1fr)); gap:2rem; }
.feature-item {
    text-align:center; padding:2.5rem 1.5rem; background:var(--card-bg);
    border-radius:var(--radius); border:1px solid var(--border-color); transition:all var(--transition);
    box-shadow:var(--shadow-sm);
}
.feature-item:hover { box-shadow:var(--shadow-card); transform:translateY(-2px); }
.feature-icon { font-size:2.5rem; margin-bottom:1rem; }
.feature-item h4 { margin-bottom:0.5rem; font-size:1.1rem; }
.feature-item p { color:var(--text-secondary); font-size:0.9rem; }

/* --- Stats --- */
.stats-row { display:grid; grid-template-columns:repeat(auto-fill,minmax(200px,1fr)); gap:2rem; text-align:center; }
.stat-item .stat-number {
    font-size:2.5rem; font-weight:800; background:var(--gradient-accent);
    -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text;
}
.stat-item .stat-label { color:var(--text-secondary); font-size:0.9rem; margin-top:0.3rem; }

/* --- CTA --- */
.cta-section { background:var(--section-alt); text-align:center; padding:5rem 0; border-top:1px solid var(--border-color); border-bottom:1px solid var(--border-color); }
.cta-section h2 { font-size:2rem; margin-bottom:1rem; }
.cta-section p { color:var(--text-secondary); margin-bottom:2rem; font-size:1.05rem; }

/* --- Footer --- */
.footer { background:#f1f5f9; border-top:1px solid var(--border-color); padding:3rem 0 1.5rem; }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:2rem; margin-bottom:2rem; }
.footer-brand p { color:var(--text-secondary); font-size:0.9rem; margin-top:0.75rem; line-height:1.7; }
.footer-col h5 { font-size:0.95rem; margin-bottom:1rem; }
.footer-col ul { list-style:none; }
.footer-col ul li { margin-bottom:0.5rem; }
.footer-col ul li a { color:var(--text-secondary); font-size:0.88rem; }
.footer-col ul li a:hover { color:var(--accent-orange); }
.footer-bottom { border-top:1px solid var(--border-color); padding-top:1.5rem; text-align:center; color:var(--text-muted); font-size:0.85rem; }

/* --- Page Hero --- */
.page-hero { padding:8rem 0 4rem; background:var(--gradient-hero); text-align:center; position:relative; border-bottom:1px solid var(--border-color); }
.page-hero::before {
    content:''; position:absolute; inset:0;
    background:linear-gradient(90deg,rgba(30,64,175,0.03) 1px,transparent 1px),
               linear-gradient(0deg,rgba(30,64,175,0.03) 1px,transparent 1px);
    background-size:60px 60px; pointer-events:none;
}
.page-hero h1 { font-size:2.5rem; margin-bottom:0.5rem; position:relative; z-index:1; }
.page-hero p { color:var(--text-secondary); font-size:1.1rem; position:relative; z-index:1; }

/* --- Product Detail --- */
.product-detail-layout { display:grid; grid-template-columns:1fr 1fr; gap:3rem; align-items:start; }
.product-detail-info .product-icon { width:64px; height:64px; background:rgba(30,64,175,0.1); border-radius:var(--radius-sm); display:flex; align-items:center; justify-content:center; font-size:1.8rem; margin-bottom:1.5rem; }
.product-detail-info h2 { font-size:1.8rem; margin-bottom:1rem; }
.product-detail-info .long-desc { color:var(--text-secondary); line-height:1.8; margin-bottom:1.5rem; }
.product-detail-info .tagline { color:var(--accent-orange); font-weight:600; margin-bottom:1rem; }
.feature-list { list-style:none; }
.feature-list li { padding:0.5rem 0; display:flex; align-items:center; gap:0.6rem; }
.feature-list li::before { content:'\2713'; color:var(--accent-orange); font-weight:700; }

/* --- Version Table --- */
.version-table { width:100%; border-collapse:collapse; background:var(--card-bg); border-radius:var(--radius); overflow:hidden; border:1px solid var(--border-color); }
.version-table thead { background:var(--surface-light); }
.version-table th { padding:1rem 1.25rem; text-align:left; font-size:0.85rem; color:var(--text-muted); font-weight:600; text-transform:uppercase; letter-spacing:0.05em; }
.version-table td { padding:1rem 1.25rem; border-top:1px solid var(--border-color); font-size:0.9rem; }
.version-table tr:hover td { background:var(--surface-light); }
.btn-download { display:inline-flex; align-items:center; gap:0.3rem; padding:0.4rem 1rem; background:var(--accent-orange); color:#fff; border-radius:6px; font-size:0.82rem; font-weight:600; transition:all var(--transition); }
.btn-download:hover { background:var(--accent-orange-light); color:#fff; transform:translateY(-1px); }

/* --- Contact --- */
.contact-grid { display:grid; grid-template-columns:1fr 1fr; gap:3rem; }
.contact-info-list { list-style:none; }
.contact-info-list li { display:flex; align-items:flex-start; gap:1rem; margin-bottom:1.5rem; padding:1rem; background:var(--surface-light); border-radius:var(--radius-sm); border:1px solid var(--border-color); }
.contact-info-list .ci-icon { font-size:1.4rem; flex-shrink:0; }
.contact-info-list .ci-label { font-size:0.82rem; color:var(--text-muted); margin-bottom:0.2rem; }
.contact-info-list .ci-value { font-weight:500; }
.contact-form { background:var(--card-bg); border:1px solid var(--border-color); border-radius:var(--radius); padding:2rem; box-shadow:var(--shadow-sm); }
.form-group { margin-bottom:1.25rem; }
.form-group label { display:block; font-size:0.9rem; margin-bottom:0.4rem; font-weight:500; }
.form-group input, .form-group textarea, .form-group select { width:100%; padding:0.75rem 1rem; background:var(--surface-light); border:1px solid var(--border-color); border-radius:var(--radius-sm); font-size:0.95rem; font-family:inherit; transition:border-color var(--transition); color:var(--text-primary); }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { outline:none; border-color:var(--accent-orange); }
.form-group textarea { height:120px; resize:vertical; }

/* --- About --- */
.about-content { max-width:800px; margin:0 auto; text-align:center; }
.about-content p { color:var(--text-secondary); font-size:1.05rem; line-height:1.9; margin-bottom:1.5rem; }
.values-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(220px,1fr)); gap:1.5rem; margin-top:3rem; }
.value-card { background:var(--card-bg); border:1px solid var(--border-color); border-radius:var(--radius); padding:2rem; text-align:center; transition:all var(--transition); box-shadow:var(--shadow-sm); }
.value-card:hover { box-shadow:var(--shadow-card); transform:translateY(-2px); }
.value-card .v-icon { font-size:2rem; margin-bottom:1rem; }
.value-card h4 { margin-bottom:0.5rem; }
.value-card p { color:var(--text-secondary); font-size:0.88rem; }

/* --- Animation --- */
.fade-in { opacity:0; transform:translateY(30px); transition:opacity 0.6s ease, transform 0.6s ease; }
.fade-in.visible { opacity:1; transform:translateY(0); }

/* --- Responsive --- */
@media (max-width:768px) {
    .nav-links { position:fixed; top:70px; left:0; right:0; background:rgba(255,255,255,0.98); backdrop-filter:blur(12px); flex-direction:column; padding:2rem; gap:1.5rem; transform:translateY(-100%); opacity:0; transition:all 0.3s ease; pointer-events:none; border-bottom:1px solid var(--border-color); }
    .nav-links.active { transform:translateY(0); opacity:1; pointer-events:all; }
    .nav-toggle { display:block; }
    .hero h1 { font-size:2.2rem; }
    .hero p { font-size:1rem; }
    .section-title { font-size:1.7rem; }
    .products-grid { grid-template-columns:1fr; }
    .product-detail-layout { grid-template-columns:1fr; }
    .contact-grid { grid-template-columns:1fr; }
    .footer-grid { grid-template-columns:1fr 1fr; }
    .stats-row { grid-template-columns:1fr 1fr; }
    .page-hero h1 { font-size:1.8rem; }
}
@media (max-width:480px) {
    .footer-grid { grid-template-columns:1fr; }
    .hero-actions { flex-direction:column; }
    .btn { width:100%; justify-content:center; }
}

/* --- Featured Product Showcase --- */
.featured-product {
    padding: 4rem 0;
    background: var(--primary-bg);
    border-bottom: 1px solid var(--border-color);
}
.featured-product .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}
.featured-product .fp-image {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-card);
}
.featured-product .fp-image img {
    display: block;
    width: 100%;
    height: auto;
}
.featured-product .fp-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(30,64,175,0.1);
    border: 1px solid rgba(30,64,175,0.25);
    color: var(--accent-orange);
    padding: 0.3rem 0.8rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 1rem;
}
.featured-product h2 {
    font-size: 2rem;
    margin-bottom: 0.75rem;
}
.featured-product .fp-desc {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1.5rem;
    font-size: 1rem;
}
.featured-product .fp-specs {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}
.featured-product .fp-specs span {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    background: var(--surface-light);
    padding: 0.4rem 1rem;
    border-radius: 50px;
    border: 1px solid var(--border-color);
}
@media (max-width:768px) {
    .featured-product .container {
        grid-template-columns: 1fr;
    }
    .featured-product h2 {
        font-size: 1.5rem;
    }
}