/* ================================================================
   得牛软件 - 简化版官网公共样式（简洁清新）
   以「灯光分拣 + WMS」为核心，白底 + 单一主色 + 大量留白
   ================================================================ */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
        'Hiragino Sans GB', 'Microsoft YaHei', '微软雅黑', Roboto, Arial, sans-serif;
    background: #ffffff;
    color: #1f2937;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* ---- 导航 ---- */
.navbar {
    position: sticky; top: 0; z-index: 100;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #f0f0f0;
}
.nav-container {
    display: flex; justify-content: space-between; align-items: center;
    height: 64px; max-width: 1080px; margin: 0 auto; padding: 0 24px;
}
.logo { font-size: 1.4rem; font-weight: 700; color: #111827; display: flex; align-items: center; gap: 8px; }
.logo img { height: 32px; width: auto; display: block; }
.logo span { color: #2563eb; }
.nav-links { display: flex; gap: 2rem; }
.nav-links a { color: #4b5563; font-size: 0.95rem; transition: color .2s; }
.nav-links a:hover, .nav-links a.active { color: #2563eb; }
.nav-cta {
    background: #2563eb; color: #fff; padding: 8px 20px; border-radius: 30px;
    font-size: 0.9rem; transition: background .2s;
}
.nav-cta:hover { background: #1d4ed8; }
.mobile-menu-btn { display: none; font-size: 1.5rem; background: none; border: none; cursor: pointer; }

/* ---- 按钮 ---- */
.btn {
    display: inline-block; padding: 12px 32px; border-radius: 30px;
    font-weight: 600; font-size: 1rem; transition: all .2s; cursor: pointer; border: none;
}
.btn-primary { background: #2563eb; color: #fff; }
.btn-primary:hover { background: #1d4ed8; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(37,99,235,.25); }
.btn-outline { background: #fff; color: #2563eb; border: 1.5px solid #2563eb; }
.btn-outline:hover { background: #f0f7ff; }

/* ---- Hero ---- */
.hero { padding: 96px 0 80px; text-align: center; }
.hero-badge {
    display: inline-block; background: #eff6ff; color: #2563eb;
    padding: 6px 16px; border-radius: 30px; font-size: 0.85rem; margin-bottom: 24px;
}
.hero h1 { font-size: 3rem; font-weight: 800; line-height: 1.2; letter-spacing: -0.5px; }
.hero h1 .accent { color: #2563eb; }
.hero p {
    font-size: 1.15rem; color: #6b7280; max-width: 620px;
    margin: 20px auto 32px;
}
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ---- 区块 ---- */
.section { padding: 20px 0; }
.section-light { background: #f9fafb; }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 48px; }
.section-head h2 { font-size: 2.2rem; font-weight: 800; letter-spacing: -0.5px; }
.section-head p { color: #6b7280; margin-top: 12px; font-size: 1.05rem; }

/* ---- 卡片 ---- */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.card {
    background: #fff; border: 1px solid #f0f0f0; border-radius: 16px;
    padding: 32px; transition: all .25s;
}
.card:hover { border-color: #bfdbfe; box-shadow: 0 12px 30px -12px rgba(37,99,235,.15); transform: translateY(-3px); }
.card-icon { font-size: 2.2rem; margin-bottom: 16px; }
.card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 8px; }
.card p { color: #6b7280; font-size: 0.95rem; }

/* ---- 行业展示卡片 ---- */
.industry-card {
    background: #fff; border: 1px solid #f0f0f0; border-radius: 16px;
    padding: 28px 24px; text-align: center; transition: all .25s;
}
.industry-card:hover { border-color: #bfdbfe; box-shadow: 0 12px 30px -12px rgba(37,99,235,.15); transform: translateY(-3px); }
.industry-icon { font-size: 2.6rem; margin-bottom: 12px; }
.industry-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 6px; }
.industry-card p { color: #6b7280; font-size: 0.88rem; }

/* ---- 标杆客户页 ---- */
.industry-block { margin-bottom: 64px; }
.industry-block-title {
    display: flex; align-items: center; gap: 12px;
    font-size: 1.5rem; font-weight: 800; margin-bottom: 24px;
}
.industry-block-title .ib-icon { font-size: 1.8rem; }
.client-card {
    background: #fff; border: 1px solid #f0f0f0; border-radius: 16px;
    overflow: hidden; transition: all .25s;
    display: flex; flex-direction: column;
}
.client-card:hover { border-color: #bfdbfe; box-shadow: 0 12px 30px -12px rgba(37,99,235,.15); transform: translateY(-3px); }
.client-body { padding: 24px; }
.client-body h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 4px; }
.client-body .client-tag { color: #2563eb; font-size: 0.82rem; font-weight: 600; margin-bottom: 8px; display: inline-block; }
.client-body p { color: #6b7280; font-size: 0.9rem; }

/* ---- 数据条 ---- */
.stats {
    display: flex; flex-wrap: wrap; justify-content: center; gap: 48px;
    background: #111827; border-radius: 20px; padding: 40px 32px; color: #fff;
    text-align: center;
}
.stat-number { font-size: 2.6rem; font-weight: 800; color: #60a5fa; }
.stat-label { color: #d1d5db; font-size: 0.9rem; margin-top: 4px; }

/* ---- 特性列表 ---- */
.feature-list li {
    display: flex; align-items: flex-start; gap: 12px; padding: 12px 0;
    border-bottom: 1px solid #f3f4f6;
}
.feature-list li:last-child { border-bottom: none; }
.feature-check { color: #2563eb; font-weight: 700; flex-shrink: 0; }

/* ---- CTA ---- */
.cta { text-align: center; background: #eff6ff; border-radius: 20px; padding: 56px 32px; }
.cta h2 { font-size: 2rem; font-weight: 800; }
.cta p { color: #6b7280; margin: 12px 0 28px; }
.cta-wx { width: 180px; height: auto; border-radius: 12px; box-shadow: 0 8px 24px rgba(0,0,0,.08); display: inline-block; }

/* ---- 页脚 ---- */
footer { background: #111827; color: #9ca3af; padding: 56px 0 32px; margin-top: 48px; }
.footer-grid { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 32px; }
.footer-brand { max-width: 320px; }
.footer-brand .logo { margin-bottom: 16px; }
.footer-contact { display: flex; flex-direction: column; gap: 10px; font-size: 0.9rem; }
.footer-contact .contact-item { display: flex; align-items: flex-start; gap: 8px; color: #d1d5db; }
.footer-contact .contact-item .ci-icon { flex-shrink: 0; }
.footer-col h4 { color: #fff; font-size: 1rem; margin-bottom: 16px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { color: #9ca3af; transition: color .2s; font-size: 0.9rem; }
.footer-links a:hover { color: #fff; }
.copyright { font-size: 0.85rem; margin-top: 32px; padding-top: 24px; border-top: 1px solid #1f2937; text-align: center; }

/* ---- 现场视频 ---- */
.video-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.video-card {
    background: #fff; border: 1px solid #f0f0f0; border-radius: 16px;
    overflow: hidden; transition: all .25s;
}
.video-card:hover { border-color: #bfdbfe; box-shadow: 0 12px 30px -12px rgba(37,99,235,.15); transform: translateY(-3px); }
.video-wrap { position: relative; aspect-ratio: 9 / 16; background: #0f172a; cursor: pointer; }
.video-wrap video { width: 100%; height: 100%; object-fit: contain; display: block; }
.video-poster {
    position: absolute; inset: 0;
    display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px;
    background: #0f172a;
    color: #fff; text-align: center;
}
.video-poster .play-btn {
    width: 64px; height: 64px; border-radius: 50%;
    background: rgba(37,99,235,.9); display: flex; align-items: center; justify-content: center;
    font-size: 1.6rem; transition: all .2s;
    box-shadow: 0 8px 20px rgba(0,0,0,.3);
}
.video-card:hover .play-btn { background: #2563eb; transform: scale(1.1); }
.video-poster .vp-title {
    position: absolute; bottom: 12px; left: 12px; right: 12px;
    font-size: 0.95rem; font-weight: 600;
    text-shadow: 0 2px 8px rgba(0,0,0,.6);
    text-align: left;
}
.video-poster .vp-hint { display: none; }
.video-meta { padding: 14px 18px; display: flex; align-items: center; gap: 10px; }
.video-meta .vm-icon { font-size: 1.2rem; }
.video-meta h4 { font-size: 0.98rem; font-weight: 600; }
.video-meta p { font-size: 0.82rem; color: #6b7280; margin-top: 2px; }

/* ---- 产品图片展示 ---- */
.photo-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.photo-card {
    background: #fff; border: 1px solid #f0f0f0; border-radius: 16px;
    overflow: hidden; transition: all .25s;
}
.photo-card:hover { border-color: #bfdbfe; box-shadow: 0 12px 30px -12px rgba(37,99,235,.15); transform: translateY(-3px); }
.photo-wrap {
    position: relative; background: #f8fafc; overflow: hidden;
    height: 300px; display: flex; align-items: center; justify-content: center;
}
.photo-wrap img { width: 100%; height: 100%; object-fit: contain; display: block; transition: transform .3s; }
.photo-card:hover .photo-wrap img { transform: scale(1.03); }
.photo-meta { padding: 14px 18px; }
.photo-meta h4 { font-size: 1rem; font-weight: 600; margin-bottom: 4px; }
.photo-meta p { font-size: 0.85rem; color: #6b7280; }

/* ---- 响应式 ---- */
@media (max-width: 900px) {
    .video-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .nav-links, .nav-cta { display: none; }
    .mobile-menu-btn { display: block; }
    .hero h1 { font-size: 2.2rem; }
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .stats { gap: 24px; }
    .video-grid, .photo-grid { grid-template-columns: 1fr; }
}