/* ============================================================
   渐朗电子官网 — 简洁商务风
   主色：深蓝 #14528c · 正文 #1f2937 · 次要 #6b7280 · 边框 #e5e7eb
   ============================================================ */

:root {
    --primary: #14528c;
    --primary-dark: #0e3d6b;
    --text: #1f2937;
    --text-muted: #6b7280;
    --border: #e5e7eb;
    --bg-light: #f8fafc;
}

body {
    font-family: system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
    color: var(--text);
    padding-top: 64px;          /* 固定导航高度 */
    line-height: 1.7;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }

/* ---------- 导航栏 ---------- */
.site-navbar {
    background: #fff;
    border-bottom: 1px solid var(--border);
    min-height: 64px;
}
.site-navbar .navbar-brand { color: var(--text); font-weight: 700; letter-spacing: .5px; }
.site-navbar .navbar-brand:hover { color: var(--text); }
.brand-sub {
    display: block;
    font-size: .65rem;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--text-muted);
}
.site-navbar .nav-link {
    color: #4b5563;
    font-size: .95rem;
    padding: .5rem 1rem !important;
    margin: 0 .15rem;
}
.site-navbar .nav-link:hover { color: var(--primary); }
.site-navbar .nav-link.active { color: var(--primary); font-weight: 600; }

/* ---------- 按钮 ---------- */
.btn-primary { background: var(--primary); border-color: var(--primary); }
.btn-primary:hover, .btn-primary:focus { background: var(--primary-dark); border-color: var(--primary-dark); }
.btn-outline-primary { color: var(--primary); border-color: var(--primary); }
.btn-outline-primary:hover { background: var(--primary); border-color: var(--primary); }
.btn-outline-light { color: #fff; border-color: rgba(255,255,255,.6); }
.btn-outline-light:hover { background: rgba(255,255,255,.12); border-color: #fff; color: #fff; }
.btn { border-radius: 6px; font-size: .95rem; }

/* ---------- Hero ---------- */
.hero {
    background: linear-gradient(135deg, #0e3d6b 0%, #14528c 100%);
    color: #fff;
    padding: 96px 0;
}
.hero h1 {
    font-size: 2.4rem;
    font-weight: 700;
    letter-spacing: .5px;
    margin-bottom: 1rem;
}
.hero p {
    color: rgba(255,255,255,.85);
    font-size: 1.05rem;
    margin-bottom: 1.75rem;
}

/* ---------- 区块通用 ---------- */
.section { padding: 72px 0; }
.section-alt { background: var(--bg-light); }
.section-label {
    font-size: .8rem;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--primary);
    text-transform: uppercase;
    margin-bottom: .5rem;
}
.section-title { font-size: 1.75rem; font-weight: 700; margin-bottom: .75rem; }
.section-sub { color: var(--text-muted); margin-bottom: 2.5rem; }

/* ---------- 产品卡片 ---------- */
.product-card {
    border: 1px solid var(--border);
    border-radius: 8px;
    background: #fff;
    padding: 1.75rem 1.5rem;
    height: 100%;
    transition: border-color .2s ease, box-shadow .2s ease;
}
.product-card:hover { border-color: var(--primary); box-shadow: 0 4px 16px rgba(20,82,140,.08); }
.product-card .p-model { font-size: 1.05rem; font-weight: 700; color: var(--primary); }
.product-card .p-name { font-weight: 600; margin: .25rem 0 .75rem; }
.product-card .p-desc { color: var(--text-muted); font-size: .9rem; margin-bottom: 1.25rem; }
.product-card .p-link { font-size: .88rem; font-weight: 500; }

/* ---------- 产品详情（产品中心页） ---------- */
.product-detail {
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 2rem 2.25rem;
    margin-bottom: 1.5rem;
    background: #fff;
}
.product-detail h3 { font-size: 1.35rem; font-weight: 700; }
.product-detail .p-model-line { color: var(--primary); font-weight: 600; margin-bottom: .5rem; }
.product-detail .p-desc { color: var(--text-muted); margin-bottom: 1.5rem; }
.spec-table { font-size: .92rem; }
.spec-table td { padding: .5rem .75rem; border-color: var(--border); }
.spec-table .spec-key { color: var(--text-muted); width: 36%; white-space: nowrap; }
.feature-list { padding-left: 0; list-style: none; }
.feature-list li { padding: .35rem 0; color: #374151; font-size: .93rem; }

/* ---------- 优势/要点 ---------- */
.adv-item { padding: 1.25rem 0; }
.adv-item .adv-title { font-weight: 600; margin-bottom: .35rem; }
.adv-item .adv-text { color: var(--text-muted); font-size: .92rem; }

/* ---------- 页头横幅（内页） ---------- */
.page-banner {
    background: var(--bg-light);
    border-bottom: 1px solid var(--border);
    padding: 48px 0;
}
.page-banner h1 { font-size: 1.8rem; font-weight: 700; margin-bottom: .35rem; }
.page-banner p { color: var(--text-muted); margin: 0; }

/* ---------- CTA ---------- */
.cta-section { border-top: 1px solid var(--border); }

/* ---------- 页脚 ---------- */
.site-footer {
    background: #0f2c4d;
    color: rgba(255,255,255,.75);
    padding: 48px 0 24px;
    font-size: .92rem;
}
.site-footer h6 { color: #fff; font-weight: 600; margin-bottom: 1rem; font-size: .95rem; }
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { padding: .2rem 0; }
.footer-links a { color: rgba(255,255,255,.75); }
.footer-links a:hover { color: #fff; }
.footer-hr { border-color: rgba(255,255,255,.15); margin: 1.75rem 0 1rem; }
.footer-copy { color: rgba(255,255,255,.5); font-size: .85rem; }
.footer-copy a { color: rgba(255,255,255,.6); }
.footer-icp { color: rgba(255,255,255,.45); font-size: .82rem; text-decoration: none; }
.footer-icp:hover { color: rgba(255,255,255,.7); }

/* ---------- 表单 ---------- */
.form-control, .form-select { border-radius: 6px; border-color: var(--border); font-size: .95rem; }
.form-control:focus, .form-select:focus { border-color: var(--primary); box-shadow: 0 0 0 .2rem rgba(20,82,140,.1); }

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
    .hero { padding: 64px 0; }
    .hero h1 { font-size: 1.7rem; }
    .section { padding: 48px 0; }
}