/* lgh10 - 石墨黑 | 上市公司企业官网 */
:root {
  --lgh-primary: #212529;
  --lgh-primary-dark: #0d1117;
  --lgh-accent: #3b82f6;
  --lgh-accent2: #1d4ed8;
  --lgh-bg: #ffffff;
  --lgh-sub-bg: #f9fafb;
  --lgh-text: #1e293b;
  --lgh-text-2: #64748b;
  --lgh-border: #e5e5e5;
  --lgh-gradient-start: #212529;
  --lgh-gradient-end: #1d4ed8;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Microsoft YaHei', Tahoma, Verdana, Arial, "PingFang SC", sans-serif; color: var(--lgh-text); background: var(--lgh-bg); line-height: 1.6; margin: 0; }
a { color: var(--lgh-primary); text-decoration: none; transition: all .3s; }
a:hover { color: var(--lgh-accent); }

/* Header */
.lgh-header { background: #fff; box-shadow: 0 2px 10px rgba(0,0,0,.06); position: sticky; top: 0; z-index: 1000; }
.lgh-header .navbar { padding: 14px 0; }
.lgh-header .logo { display: flex; align-items: center; text-decoration: none; gap: 10px; }
.lgh-header .logo-img { max-height: 48px; }
.lgh-header .logo-text { font-size: 1.15rem; font-weight: 700; color: var(--lgh-primary); }
.lgh-header .navbar-nav .nav-link { color: var(--lgh-text)!important; font-size: .9rem; font-weight: 500; padding: 12px 18px!important; position: relative; transition: .3s; }
.lgh-header .navbar-nav .nav-link::after { content:''; position: absolute; left: 50%; bottom: 6px; width: 0; height: 2px; background: var(--lgh-primary); transition: all .3s; }
.lgh-header .navbar-nav .nav-link:hover::after,.lgh-header .navbar-nav .nav-link.active::after { width: calc(100% - 36px); left: 18px; }
.lgh-header .navbar-nav .nav-link:hover,.lgh-header .navbar-nav .nav-link.active { color: var(--lgh-primary)!important; }
.lgh-header .navbar-nav .dropdown-menu { border: none; border-top: 2px solid var(--lgh-primary); box-shadow: 0 6px 20px rgba(0,0,0,.1); border-radius: 0; padding: 8px 0; min-width: 200px; }
.lgh-header .navbar-nav .dropdown-item { font-size: .88rem; padding: 10px 20px; transition: .3s; }
.lgh-header .navbar-nav .dropdown-item:hover { background: var(--lgh-primary); color: #fff; }

/* Hero Banner */
.lgh-hero { position: relative; height: 560px; overflow: hidden; background: var(--lgh-primary-dark); }
.lgh-hero-bg { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(0,0,0,.5) 0%, rgba(0,0,0,.3) 50%, rgba(0,0,0,.5) 100%); z-index: 1; }
.lgh-hero-content { position: relative; z-index: 2; height: 100%; display: flex; align-items: center; text-align: center; }
.lgh-hero h1 { color: #fff; font-size: 2.4rem; font-weight: 700; margin-bottom: 18px; text-shadow: 0 2px 10px rgba(0,0,0,.3); }
.lgh-hero h1 small { display: block; font-size: 1.1rem; font-weight: 400; color: rgba(255,255,255,.85); margin-bottom: 10px; letter-spacing: 2px; }
.lgh-hero p { color: rgba(255,255,255,.9); font-size: 1rem; max-width: 700px; margin: 0 auto 28px; line-height: 1.8; }
.lgh-btn { display: inline-flex; align-items: center; padding: 12px 40px; font-weight: 600; font-size: .9rem; text-decoration: none; transition: all .3s; border: 1px solid #fff; color: #fff; letter-spacing: 1px; }
.lgh-btn:hover { background: #fff; color: var(--lgh-primary); }

/* Section */
.lgh-section { padding: 70px 0; }
.lgh-section.alt { background: var(--lgh-sub-bg); }
.lgh-stitle { text-align: center; margin-bottom: 50px; }
.lgh-stitle h2 { font-size: 1.8rem; font-weight: 700; color: var(--lgh-text); margin: 0 0 10px; }
.lgh-stitle .gradient { background: linear-gradient(135deg, var(--lgh-gradient-start), var(--lgh-gradient-end)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.lgh-stitle p { color: var(--lgh-text-2); font-size: .95rem; margin: 0; }
.lgh-stitle::after { content:''; display: block; width: 60px; height: 2px; background: linear-gradient(to right, var(--lgh-gradient-start), var(--lgh-gradient-end)); margin: 16px auto 0; }

/* About Cards (3 cards) */
.lgh-about-card { position: relative; border-radius: 8px; overflow: hidden; box-shadow: 0 4px 20px rgba(0,0,0,.08); transition: all .4s; height: 320px; }
.lgh-about-card:hover { transform: translateY(-5px); box-shadow: 0 12px 40px rgba(0,0,0,.15); }
.lgh-about-card-img { position: absolute; inset: 0; background: linear-gradient(135deg, var(--lgh-primary) 0%, var(--lgh-accent) 100%); display: flex; align-items: center; justify-content: center; }
.lgh-about-card-img i { font-size: 5rem; color: rgba(255,255,255,.3); }
.lgh-about-card:hover .lgh-about-card-img i { transform: scale(1.15); transition: .4s; }
.lgh-about-card-overlay { position: absolute; bottom: 0; left: 0; right: 0; padding: 20px 24px; background: linear-gradient(180deg, transparent, rgba(0,0,0,.7)); color: #fff; }
.lgh-about-card-overlay h4 { font-size: 1.15rem; font-weight: 700; margin: 0 0 4px; }
.lgh-about-card-overlay span { font-size: .78rem; color: rgba(255,255,255,.7); letter-spacing: 2px; text-transform: uppercase; }

/* Product Section */
.lgh-product { padding: 80px 0 100px; background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%); }
.lgh-product-item { text-align: center; margin-bottom: 30px; cursor: pointer; transition: .3s; }
.lgh-product-circle { width: 200px; height: 200px; border-radius: 50%; background: linear-gradient(135deg, var(--lgh-primary) 0%, var(--lgh-accent) 100%); margin: 0 auto 20px; display: flex; align-items: center; justify-content: center; position: relative; transition: all .3s; box-shadow: 0 8px 30px rgba(0,0,0,.12); }
.lgh-product-circle::after { content:''; position: absolute; inset: 8px; border: 1px solid rgba(255,255,255,.3); border-radius: 50%; }
.lgh-product-circle i { font-size: 3.5rem; color: #fff; }
.lgh-product-item:hover .lgh-product-circle { transform: scale(1.05); box-shadow: 0 16px 40px rgba(0,0,0,.18); }
.lgh-product-item h4 { font-size: 1.05rem; font-weight: 700; color: var(--lgh-text); margin: 0; }

/* Solution Section */
.lgh-solution { padding: 80px 0; background: var(--lgh-sub-bg); }
.lgh-solution-content h3 { font-size: 1.4rem; font-weight: 700; color: var(--lgh-text); margin-bottom: 18px; }
.lgh-solution-content p { color: var(--lgh-text-2); font-size: .95rem; line-height: 1.8; }
.lgh-solution-img { border-radius: 8px; overflow: hidden; box-shadow: 0 12px 30px rgba(0,0,0,.1); }
.lgh-solution-img img { width: 100%; height: 320px; object-fit: cover; display: block; }

/* Investor Section */
.lgh-investor { padding: 80px 0; background: linear-gradient(135deg, var(--lgh-primary-dark) 0%, var(--lgh-primary) 50%, var(--lgh-accent) 100%); color: #fff; text-align: center; }
.lgh-investor-circle { width: 300px; height: 300px; border-radius: 50%; border: 1px solid rgba(255,255,255,.5); margin: 0 auto 30px; display: flex; align-items: center; justify-content: center; flex-direction: column; padding: 30px; }
.lgh-investor-circle h3 { font-size: 1.5rem; font-weight: 700; margin: 0 0 10px; }
.lgh-investor-circle p { color: rgba(255,255,255,.8); font-size: .9rem; margin: 0 0 20px; }
.lgh-investor-plus { width: 50px; height: 50px; border-radius: 50%; background: #fff; color: var(--lgh-primary); display: inline-flex; align-items: center; justify-content: center; font-size: 1.4rem; font-weight: 700; }

/* News Section */
.lgh-news-card { background: #fff; border: 1px solid var(--lgh-border); border-radius: 8px; overflow: hidden; box-shadow: 0 0 15px rgba(0,0,0,.04); transition: all .3s; }
.lgh-news-card:hover { box-shadow: 0 8px 24px rgba(0,0,0,.1); transform: translateY(-3px); }
.lgh-news-card-img { height: 180px; background: linear-gradient(135deg, rgba(26,100,177,.08), rgba(40,184,208,.05)); display: flex; align-items: center; justify-content: center; }
.lgh-news-card-img i { font-size: 3rem; color: var(--lgh-primary); opacity: .3; }
.lgh-news-card-body { padding: 24px 28px; }
.lgh-news-card-body h4 { font-size: 1rem; font-weight: 700; color: var(--lgh-text); margin-bottom: 10px; line-height: 1.5; }
.lgh-news-card-body h4 a { color: var(--lgh-text); }
.lgh-news-card-body h4 a:hover { color: var(--lgh-primary); }
.lgh-news-card-body time { font-size: .82rem; color: var(--lgh-text-2); display: block; margin-top: 12px; }

/* Footer */
.lgh-footer { background: #1a1a1a; color: rgba(255,255,255,.7); padding: 50px 0 0; }
.lgh-footer h5 { color: #fff; font-size: .95rem; font-weight: 700; margin-bottom: 18px; padding-bottom: 10px; border-bottom: 1px solid rgba(255,255,255,.1); position: relative; }
.lgh-footer h5::after { content:''; position: absolute; bottom: -1px; left: 0; width: 40px; height: 2px; background: var(--lgh-primary); }
.lgh-footer ul { list-style: none; padding: 0; }
.lgh-footer ul li { padding: 4px 0; font-size: .85rem; }
.lgh-footer a { color: rgba(255,255,255,.6); text-decoration: none; transition: .3s; }
.lgh-footer a:hover { color: var(--lgh-primary); }
.lgh-footer .copy { border-top: 1px solid rgba(255,255,255,.08); padding: 18px 0; margin-top: 30px; text-align: center; font-size: .82rem; color: rgba(255,255,255,.4); }

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

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

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

/* Article */
.lgh-article { background: #fff; padding: 30px; border: 1px solid var(--lgh-border); border-radius: 8px; }
.lgh-article h1 { font-size: 1.8rem; font-weight: 700; color: var(--lgh-text); margin-bottom: 16px; }
.lgh-article-meta { color: var(--lgh-text-2); font-size: .88rem; margin-bottom: 24px; padding-bottom: 16px; border-bottom: 1px solid var(--lgh-border); }
.lgh-article-content { color: var(--lgh-text); font-size: 1rem; line-height: 1.8; }
.lgh-article-content p { margin-bottom: 16px; }
.lgh-article-content img { max-width: 100%; border-radius: 6px; margin: 12px 0; }

@media (max-width: 768px) {
  .lgh-hero { height: 400px; }
  .lgh-hero h1 { font-size: 1.6rem; }
  .lgh-section { padding: 50px 0; }
  .lgh-product-circle { width: 150px; height: 150px; }
  .lgh-product-circle i { font-size: 2.5rem; }
  .lgh-investor-circle { width: 250px; height: 250px; padding: 20px; }
}