/* nb15 - 香榭丽舍粉 | 科技/汽车智能解决方案企业官网 */
:root {
  --nb-primary: #be185d;
  --nb-primary-dark: #831843;
  --nb-accent: #f472b6;
  --nb-accent2: #ec4899;
  --nb-bg: #ffffff;
  --nb-sub-bg: #fdf2f8;
  --nb-text: #1e293b;
  --nb-text-2: #64748b;
  --nb-border: #fbcfe8;
  --nb-gradient-start: #be185d;
  --nb-gradient-end: #f472b6;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Microsoft YaHei', Tahoma, Verdana, Arial, "PingFang SC", sans-serif; color: var(--nb-text); background: var(--nb-bg); line-height: 1.6; margin: 0; }
a { color: var(--nb-primary); text-decoration: none; transition: all .3s; }
a:hover { color: var(--nb-accent); }
img { max-width: 100%; display: block; }

/* Header */
.nb-header { background: rgba(255,255,255,.95); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); box-shadow: 0 1px 12px rgba(0,0,0,.06); position: sticky; top: 0; z-index: 1000; }
.nb-header .navbar { padding: 12px 0; }
.nb-header .logo { display: flex; align-items: center; text-decoration: none; gap: 10px; }
.nb-header .logo-img { max-height: 42px; }
.nb-header .logo-text { font-size: 1.15rem; font-weight: 700; color: var(--nb-primary); letter-spacing: 1px; }
.nb-header .navbar-nav .nav-link { color: var(--nb-text)!important; font-size: .9rem; font-weight: 500; padding: 10px 16px!important; position: relative; transition: .3s; }
.nb-header .navbar-nav .nav-link::after { content:''; position: absolute; left: 50%; bottom: 4px; width: 0; height: 2px; background: var(--nb-primary); transition: all .3s; }
.nb-header .navbar-nav .nav-link:hover::after,.nb-header .navbar-nav .nav-link.active::after { width: calc(100% - 32px); left: 16px; }
.nb-header .navbar-nav .nav-link:hover,.nb-header .navbar-nav .nav-link.active { color: var(--nb-primary)!important; }
.nb-header .navbar-nav .dropdown-menu { border: none; border-top: 2px solid var(--nb-primary); box-shadow: 0 8px 24px rgba(0,0,0,.1); border-radius: 0; padding: 10px 0; min-width: 200px; }
.nb-header .navbar-nav .dropdown-item { font-size: .88rem; padding: 10px 22px; transition: .3s; }
.nb-header .navbar-nav .dropdown-item:hover { background: var(--nb-primary); color: #fff; }
.nb-lang { font-size: .82rem; color: var(--nb-text-2); border: 1px solid var(--nb-border); padding: 5px 12px; border-radius: 4px; cursor: pointer; transition: .3s; margin-left: 8px; }
.nb-lang:hover { border-color: var(--nb-primary); color: var(--nb-primary); }

/* Hero */
.nb-hero { position: relative; height: 600px; overflow: hidden; background: linear-gradient(135deg, var(--nb-primary-dark) 0%, var(--nb-primary) 50%, var(--nb-accent) 100%); }
.nb-hero::before { content:''; position: absolute; inset: 0; background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="60" height="60" viewBox="0 0 60 60"><path d="M0 0h60v1H0zM0 0v60h1V0z" fill="rgba(255,255,255,.06)"/></svg>'); z-index: 1; }
.nb-hero::after { content:''; position: absolute; width: 600px; height: 600px; border-radius: 50%; background: radial-gradient(circle, var(--nb-accent) 0%, transparent 70%); opacity: .25; top: -200px; right: -100px; z-index: 1; }
.nb-hero-content { position: relative; z-index: 2; height: 100%; display: flex; align-items: center; }
.nb-hero h1 { color: #fff; font-size: 3rem; font-weight: 700; margin-bottom: 18px; line-height: 1.3; text-shadow: 0 2px 12px rgba(0,0,0,.3); }
.nb-hero h1 small { display: block; font-size: 1rem; font-weight: 400; color: rgba(255,255,255,.85); margin-bottom: 14px; letter-spacing: 3px; text-transform: uppercase; }
.nb-hero p { color: rgba(255,255,255,.9); font-size: 1.05rem; max-width: 600px; margin-bottom: 32px; line-height: 1.8; }
.nb-btn { display: inline-flex; align-items: center; padding: 13px 36px; font-weight: 600; font-size: .9rem; text-decoration: none; transition: all .3s; border: 1px solid #fff; color: #fff; letter-spacing: 1px; border-radius: 4px; }
.nb-btn:hover { background: #fff; color: var(--nb-primary); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(0,0,0,.18); }
.nb-btn.primary { background: var(--nb-primary); border-color: var(--nb-primary); }
.nb-btn.primary:hover { background: var(--nb-accent); border-color: var(--nb-accent); color: #fff; }
.nb-scroll { position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%); color: #fff; font-size: .8rem; z-index: 2; opacity: .7; letter-spacing: 2px; }
.nb-scroll::after { content:''; display: block; width: 1px; height: 30px; background: rgba(255,255,255,.5); margin: 8px auto 0; animation: nbScroll 2s infinite; }
@keyframes nbScroll { 0%, 100% { opacity: 1; transform: translateY(0); } 50% { opacity: .3; transform: translateY(8px); } }

/* Section */
.nb-section { padding: 80px 0; }
.nb-section.alt { background: var(--nb-sub-bg); }
.nb-stitle { text-align: center; margin-bottom: 50px; }
.nb-stitle h2 { font-size: 1.85rem; font-weight: 700; color: var(--nb-text); margin: 0 0 12px; }
.nb-stitle .gradient { background: linear-gradient(135deg, var(--nb-gradient-start), var(--nb-gradient-end)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.nb-stitle p { color: var(--nb-text-2); font-size: .95rem; margin: 0; }
.nb-stitle::after { content:''; display: block; width: 60px; height: 3px; background: linear-gradient(to right, var(--nb-gradient-start), var(--nb-gradient-end)); margin: 18px auto 0; border-radius: 2px; }

/* Product Showcase */
.nb-product-card { position: relative; border-radius: 12px; overflow: hidden; box-shadow: 0 6px 30px rgba(0,0,0,.08); transition: all .4s; background: #fff; height: 100%; }
.nb-product-card:hover { transform: translateY(-6px); box-shadow: 0 20px 50px rgba(0,0,0,.15); }
.nb-product-img { position: relative; height: 240px; background: linear-gradient(135deg, var(--nb-primary) 0%, var(--nb-accent) 100%); display: flex; align-items: center; justify-content: center; overflow: hidden; }
.nb-product-img::before { content:''; position: absolute; inset: 0; background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="40" height="40" viewBox="0 0 40 40"><circle cx="20" cy="20" r="1.5" fill="rgba(255,255,255,.18)"/></svg>'); z-index: 1; }
.nb-product-img i { font-size: 4.5rem; color: rgba(255,255,255,.95); z-index: 2; transition: transform .4s; }
.nb-product-card:hover .nb-product-img i { transform: scale(1.15) rotate(8deg); }
.nb-product-tag { position: absolute; top: 16px; left: 16px; background: rgba(255,255,255,.95); color: var(--nb-primary); padding: 4px 12px; border-radius: 12px; font-size: .72rem; font-weight: 700; letter-spacing: 1px; z-index: 3; }
.nb-product-body { padding: 28px 26px; }
.nb-product-body h3 { font-size: 1.2rem; font-weight: 700; color: var(--nb-text); margin: 0 0 8px; }
.nb-product-body .sub { color: var(--nb-accent); font-size: .82rem; font-weight: 600; margin-bottom: 14px; letter-spacing: 1px; }
.nb-product-body p { color: var(--nb-text-2); font-size: .9rem; line-height: 1.7; margin-bottom: 18px; }
.nb-product-link { display: inline-flex; align-items: center; color: var(--nb-primary); font-weight: 600; font-size: .88rem; }
.nb-product-link i { margin-left: 6px; transition: transform .3s; }
.nb-product-link:hover i { transform: translateX(4px); }

/* Smart City Section */
.nb-city { padding: 100px 0; background: linear-gradient(135deg, var(--nb-primary-dark) 0%, var(--nb-primary) 100%); color: #fff; position: relative; overflow: hidden; }
.nb-city::before { content:''; position: absolute; width: 500px; height: 500px; border-radius: 50%; background: radial-gradient(circle, var(--nb-accent) 0%, transparent 70%); opacity: .2; bottom: -200px; left: -100px; }
.nb-city-content { position: relative; z-index: 2; }
.nb-city-content h2 { font-size: 2rem; font-weight: 700; margin-bottom: 18px; }
.nb-city-content h2 small { display: block; font-size: .9rem; font-weight: 400; color: rgba(255,255,255,.7); margin-bottom: 10px; letter-spacing: 3px; text-transform: uppercase; }
.nb-city-content p { color: rgba(255,255,255,.85); font-size: 1rem; line-height: 1.9; margin-bottom: 24px; max-width: 600px; }
.nb-city-img { position: relative; border-radius: 12px; overflow: hidden; box-shadow: 0 20px 50px rgba(0,0,0,.3); z-index: 2; }

/* Partners */
.nb-partner { padding: 70px 0; background: #fff; }
.nb-partner-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.nb-partner-item { height: 80px; background: #fff; border: 1px solid var(--nb-border); border-radius: 8px; display: flex; align-items: center; justify-content: center; color: var(--nb-text-2); font-size: .88rem; font-weight: 600; transition: all .3s; text-align: center; padding: 0 12px; }
.nb-partner-item:hover { border-color: var(--nb-primary); color: var(--nb-primary); box-shadow: 0 6px 20px rgba(0,0,0,.08); transform: translateY(-3px); }

/* News */
.nb-news-card { background: #fff; border: 1px solid var(--nb-border); border-radius: 10px; overflow: hidden; box-shadow: 0 2px 12px rgba(0,0,0,.04); transition: all .3s; height: 100%; }
.nb-news-card:hover { box-shadow: 0 12px 30px rgba(0,0,0,.1); transform: translateY(-4px); }
.nb-news-img { height: 180px; background: linear-gradient(135deg, var(--nb-sub-bg) 0%, #fff 100%); display: flex; align-items: center; justify-content: center; position: relative; overflow: hidden; }
.nb-news-img i { font-size: 3rem; color: var(--nb-primary); opacity: .3; }
.nb-news-body { padding: 22px 24px; }
.nb-news-body h4 { font-size: 1rem; font-weight: 700; color: var(--nb-text); margin-bottom: 10px; line-height: 1.5; }
.nb-news-body h4 a { color: var(--nb-text); }
.nb-news-body h4 a:hover { color: var(--nb-primary); }
.nb-news-body p { color: var(--nb-text-2); font-size: .85rem; line-height: 1.6; margin-bottom: 12px; }
.nb-news-body time { font-size: .8rem; color: var(--nb-text-2); display: block; }

/* Footer */
.nb-footer { background: #0f172a; color: rgba(255,255,255,.65); padding: 60px 0 0; }
.nb-footer h5 { color: #fff; font-size: .95rem; font-weight: 700; margin-bottom: 20px; padding-bottom: 12px; border-bottom: 1px solid rgba(255,255,255,.1); position: relative; }
.nb-footer h5::after { content:''; position: absolute; bottom: -1px; left: 0; width: 40px; height: 2px; background: var(--nb-primary); }
.nb-footer ul { list-style: none; padding: 0; }
.nb-footer ul li { padding: 5px 0; font-size: .85rem; }
.nb-footer a { color: rgba(255,255,255,.6); text-decoration: none; transition: .3s; }
.nb-footer a:hover { color: var(--nb-accent); }
.nb-footer p { color: rgba(255,255,255,.6); font-size: .85rem; line-height: 1.8; margin: 0 0 6px; }
.nb-footer .copy { border-top: 1px solid rgba(255,255,255,.08); padding: 20px 0; margin-top: 40px; text-align: center; font-size: .82rem; color: rgba(255,255,255,.4); }
.nb-footer .qr { display: inline-block; width: 90px; height: 90px; background: rgba(255,255,255,.1); border-radius: 6px; margin-top: 10px; display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,.5); }

/* Breadcrumb */
.nb-breadcrumb { background: var(--nb-sub-bg); padding: 14px 0; font-size: .85rem; border-bottom: 1px solid var(--nb-border); }
.nb-breadcrumb a { color: var(--nb-text-2); text-decoration: none; }
.nb-breadcrumb a:hover { color: var(--nb-primary); }
.nb-breadcrumb span { color: var(--nb-primary); }

/* Pagination */
.nb-pagination { display: flex; justify-content: center; gap: 6px; margin-top: 30px; }
.nb-pagination a,.nb-pagination span { display: inline-block; padding: 8px 14px; background: #fff; border: 1px solid var(--nb-border); color: var(--nb-text-2); text-decoration: none; border-radius: 4px; font-size: .9rem; transition: .3s; }
.nb-pagination a:hover,.nb-pagination .active { background: var(--nb-primary); color: #fff; border-color: var(--nb-primary); }

/* Tags */
.nb-tag-badge { display: inline-block; background: var(--nb-sub-bg); color: var(--nb-text); font-size: .85rem; padding: 8px 16px; border-radius: 4px; text-decoration: none; margin: 4px; transition: .3s; border: 1px solid var(--nb-border); }
.nb-tag-badge:hover { background: var(--nb-primary); color: #fff; border-color: var(--nb-primary); }

/* Article */
.nb-article { background: #fff; padding: 36px; border: 1px solid var(--nb-border); border-radius: 10px; }
.nb-article h1 { font-size: 1.8rem; font-weight: 700; color: var(--nb-text); margin-bottom: 16px; }
.nb-article-meta { color: var(--nb-text-2); font-size: .88rem; margin-bottom: 24px; padding-bottom: 16px; border-bottom: 1px solid var(--nb-border); }
.nb-article-content { color: var(--nb-text); font-size: 1rem; line-height: 1.8; }
.nb-article-content p { margin-bottom: 16px; }
.nb-article-content img { max-width: 100%; border-radius: 6px; margin: 12px 0; }

@media (max-width: 768px) {
  .nb-hero { height: 420px; }
  .nb-hero h1 { font-size: 1.7rem; }
  .nb-section { padding: 50px 0; }
  .nb-partner-grid { grid-template-columns: repeat(2, 1fr); }
}