/* iih01 - 中国红 | 深色企业官网模板 */
:root {
    --iih-primary: #D3001D;
    --iih-dark: #A80017;
    --iih-accent: #2350A0;
    --iih-bg: #1a1a1a;
    --iih-surface: #222222;
    --iih-card: #2a2a2a;
    --iih-text: #ffffff;
    --iih-muted: #9a9a9a;
    --iih-muted2: #b6b6b6;
    --iih-border: #333333;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: "Source Han Sans CN","Noto Sans SC","Microsoft YaHei",Arial,sans-serif; background: var(--iih-bg); color: var(--iih-text); line-height: 1.6; font-size: 16px; }
a { color: var(--iih-text); text-decoration: none; transition: color .3s; }
a:hover { color: var(--iih-primary); }
img { max-width: 100%; height: auto; }
.iih-wrap { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
/* Header */
.iih-hd { position: fixed; top: 0; left: 0; right: 0; z-index: 1001; background: rgba(0,0,0,.8); backdrop-filter: blur(8px); height: 60px; display: flex; align-items: center; }
.iih-nav { display: flex; align-items: center; justify-content: space-between; width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.iih-logo { font-size: 1.3rem; font-weight: 700; color: var(--iih-primary); display: flex; align-items: center; gap: 8px; }
.iih-logo span { color: #fff; }
.iih-menu { display: flex; list-style: none; gap: 4px; }
.iih-menu li a { padding: 8px 16px; color: #ccc; font-size: 15px; border-radius: 4px; position: relative; }
.iih-menu li a:hover, .iih-menu li.active a { color: #fff; }
.iih-menu li.active a::after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 20px; height: 2px; background: var(--iih-primary); border-radius: 1px; }
.iih-hd-right { display: flex; align-items: center; gap: 12px; }
.iih-search { background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.15); border-radius: 20px; padding: 6px 16px; color: #fff; font-size: 13px; width: 160px; outline: none; }
.iih-search::placeholder { color: rgba(255,255,255,.4); }
.iih-lang { color: var(--iih-muted); font-size: 13px; }
.iih-lang a { color: var(--iih-muted); margin: 0 4px; }
.iih-lang a.active { color: #fff; }
/* Hero */
.iih-hero { background: linear-gradient(135deg, #111 0%, #1a1a1a 50%, #111 100%); padding: 140px 0 80px; text-align: center; position: relative; overflow: hidden; min-height: 500px; display: flex; align-items: center; justify-content: center; }
.iih-hero::before { content: ''; position: absolute; inset: 0; background: radial-gradient(ellipse at 30% 50%, #D3001D15 0%, transparent 60%); }
.iih-hero h1 { font-size: 2.8rem; font-weight: 700; margin-bottom: 8px; position: relative; }
.iih-hero h1 em { font-style: normal; color: var(--iih-primary); }
.iih-hero .iih-sub { font-size: 1.2rem; color: var(--iih-muted2); margin-bottom: 30px; position: relative; }
.iih-btn { display: inline-block; padding: 12px 36px; background: var(--iih-primary); color: #fff !important; border-radius: 4px; font-weight: 600; font-size: 15px; transition: .3s; position: relative; }
.iih-btn:hover { background: var(--iih-dark); transform: translateY(-1px); box-shadow: 0 4px 15px rgba(0,0,0,.3); }
/* Stats Bar */
.iih-stats { background: rgba(0,0,0,.8); padding: 24px 0; border-top: 1px solid var(--iih-border); }
.iih-stats-grid { display: grid; grid-template-columns: repeat(6,1fr); gap: 16px; text-align: center; }
.iih-stat-num { font-size: 2.2rem; font-weight: 700; color: var(--iih-primary); line-height: 1.2; }
.iih-stat-label { font-size: 13px; color: var(--iih-muted); margin-top: 4px; }
/* Section Common */
.iih-sec { padding: 80px 0; background: var(--iih-surface); }
.iih-sec.alt { background: var(--iih-bg); }
.iih-st { text-align: center; margin-bottom: 50px; }
.iih-st h2 { font-size: 2rem; font-weight: 700; margin-bottom: 10px; }
.iih-st p { color: var(--iih-muted); font-size: 1rem; }
/* Case Section */
.iih-case { background: linear-gradient(135deg, #111, #1a1a1a); padding: 80px 0; text-align: center; position: relative; }
.iih-case h2 { font-size: 2rem; font-weight: 700; margin-bottom: 16px; }
.iih-case p { color: var(--iih-muted); max-width: 600px; margin: 0 auto 24px; font-size: 15px; line-height: 1.8; }
.iih-link { color: var(--iih-primary); font-weight: 600; font-size: 15px; }
.iih-link:hover { color: var(--iih-dark); }
/* Products */
.iih-prod-grid { display: grid; grid-template-columns: repeat(5,1fr); gap: 16px; }
.iih-prod-card { background: var(--iih-card); border-radius: 8px; overflow: hidden; transition: .3s; border: 1px solid var(--iih-border); }
.iih-prod-card:hover { transform: translateY(-4px); border-color: var(--iih-primary); }
.iih-prod-thumb { aspect-ratio: 16/10; background: linear-gradient(135deg, var(--iih-primary)22, var(--iih-card)); display: flex; align-items: center; justify-content: center; font-size: 2rem; overflow: hidden; }
.iih-prod-card:hover .iih-prod-thumb { transform: scale(1.05); }
.iih-prod-body { padding: 18px 16px; }
.iih-prod-body h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.iih-prod-body p { color: var(--iih-muted); font-size: 13px; line-height: 1.6; }
/* Industry Solutions */
.iih-ind-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
.iih-ind-card { position: relative; border-radius: 8px; overflow: hidden; aspect-ratio: 386/342; cursor: pointer; }
.iih-ind-bg { position: absolute; inset: 0; background: linear-gradient(135deg, var(--iih-primary)33, var(--iih-card)); transition: transform .5s; }
.iih-ind-card:hover .iih-ind-bg { transform: scale(1.1); }
.iih-ind-overlay { position: absolute; inset: 0; background: rgba(0,0,0,.5); transition: background .3s; }
.iih-ind-card:hover .iih-ind-overlay { background: rgba(0,0,0,.25); }
.iih-ind-content { position: absolute; bottom: 0; left: 0; right: 0; padding: 24px; z-index: 2; }
.iih-ind-icon { font-size: 2.5rem; margin-bottom: 10px; }
.iih-ind-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 6px; }
.iih-ind-card .iih-ind-sub { color: var(--iih-muted2); font-size: 13px; margin-bottom: 8px; }
.iih-ind-desc { background: linear-gradient(to right, var(--iih-primary), #D3001D1a); padding: 8px 14px; border-radius: 4px; font-size: 13px; color: #fff; opacity: 0; transform: translateY(10px); transition: .3s; }
.iih-ind-card:hover .iih-ind-desc { opacity: 1; transform: translateY(0); }
/* Partners */
.iih-partner-row { display: flex; gap: 12px; overflow: hidden; padding: 10px 0; }
.iih-partner-logo { min-width: 120px; height: 60px; background: rgba(255,255,255,.05); border: 1px solid var(--iih-border); border-radius: 8px; display: flex; align-items: center; justify-content: center; color: var(--iih-muted); font-size: 12px; font-weight: 600; flex-shrink: 0; }
/* News */
.iih-news-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; }
.iih-news-card { background: var(--iih-card); border-radius: 8px; overflow: hidden; border: 1px solid var(--iih-border); transition: .3s; }
.iih-news-card:hover { transform: translateY(-3px); border-color: var(--iih-primary); }
.iih-news-thumb { aspect-ratio: 16/9; background: linear-gradient(135deg, var(--iih-primary)22, var(--iih-card)); }
.iih-news-body { padding: 16px; }
.iih-news-body h3 { font-size: 14px; font-weight: 600; line-height: 1.5; margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.iih-news-date { color: var(--iih-muted); font-size: 12px; }
/* Footer */
.iih-ft { background: #111; padding: 50px 0 20px; border-top: 1px solid var(--iih-border); }
.iih-ft-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 30px; }
.iih-ft h4 { font-size: 1rem; font-weight: 700; margin-bottom: 14px; color: #fff; }
.iih-ft p, .iih-ft a, .iih-ft li { color: var(--iih-muted); font-size: 14px; line-height: 1.9; }
.iih-ft ul { list-style: none; }
.iih-ft ul li a:hover { color: var(--iih-primary); }
.iih-ft-bot { border-top: 1px solid var(--iih-border); padding-top: 18px; text-align: center; font-size: 13px; color: var(--iih-muted); }
.iih-ft-bot a { color: var(--iih-muted); margin: 0 8px; }
.iih-ft-bot a:hover { color: #fff; }
.iih-stock { color: var(--iih-primary); font-size: 14px; font-weight: 600; margin-top: 8px; }
/* Back to top */
.iih-top { position: fixed; bottom: 30px; right: 30px; width: 44px; height: 44px; background: var(--iih-primary); color: #fff; border-radius: 8px; display: flex; align-items: center; justify-content: center; cursor: pointer; opacity: .7; transition: .25s; z-index: 999; font-size: 18px; }
.iih-top:hover { opacity: 1; transform: translateY(-2px); }
/* Responsive */
@media (max-width:1024px) {
    .iih-prod-grid { grid-template-columns: repeat(3,1fr); }
    .iih-ind-grid { grid-template-columns: repeat(2,1fr); }
    .iih-news-grid { grid-template-columns: repeat(2,1fr); }
    .iih-stats-grid { grid-template-columns: repeat(3,1fr); }
    .iih-ft-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width:640px) {
    .iih-hero h1 { font-size: 1.8rem; }
    .iih-prod-grid, .iih-ind-grid, .iih-news-grid { grid-template-columns: 1fr; }
    .iih-stats-grid { grid-template-columns: repeat(2,1fr); }
    .iih-ft-grid { grid-template-columns: 1fr; }
    .iih-menu { display: none; }
}