/* ====== 华青创新AI 设计系统 v1 ====== */
:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #dbeafe;
    --accent: #06b6d4;
    --bg: #f8fafc;
    --bg-card: #ffffff;
    --text: #0f172a;
    --text-2: #475569;
    --text-3: #94a3b8;
    --border: #e2e8f0;
    --radius: 16px;
    --radius-sm: 10px;
    --max-w: 1200px;
    --shadow: 0 4px 24px rgba(0,0,0,.06);
    --shadow-lg: 0 20px 40px rgba(0,0,0,.08);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei','Helvetica Neue',sans-serif;background:var(--bg);color:var(--text);line-height:1.7}
a{color:var(--primary);text-decoration:none;transition:all .25s}
a:hover{color:var(--primary-dark)}
img{max-width:100%;height:auto;display:block}
h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.3;color:var(--text)}

/* ====== Header ====== */
.hdr{background:rgba(255,255,255,.92);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid rgba(226,232,240,.6);position:sticky;top:0;z-index:100}
.hri{max-width:var(--max-w);margin:0 auto;padding:0 24px;display:flex;align-items:center;height:64px;gap:36px}
.hl{font-size:21px;font-weight:800;color:var(--text);flex-shrink:0;letter-spacing:-.3px}
.hl em{font-style:normal;color:var(--primary)}
.hn{display:flex;gap:2px;flex:1;overflow-x:auto;white-space:nowrap;-webkit-overflow-scrolling:touch;scrollbar-width:none;justify-content:flex-end}
.hn::-webkit-scrollbar{display:none}
.hn a{padding:6px 16px;border-radius:8px;font-size:14px;font-weight:500;color:var(--text-2);transition:all .2s}
.hn a:hover{background:var(--primary-light);color:var(--primary)}
.hn a.on{background:var(--primary);color:#fff}
.menu-toggle{display:none;background:none;border:none;font-size:24px;cursor:pointer;padding:8px;color:var(--text)}

/* ====== Footer ====== */
.ftr{background:linear-gradient(135deg,#0f172a,#1e293b);color:#94a3b8;padding:48px 24px 32px;margin-top:64px}
.fri{max-width:var(--max-w);margin:0 auto;text-align:center}
.ftr-brand{font-size:20px;font-weight:800;color:#e2e8f0;margin-bottom:8px}
.ftr-brand em{font-style:normal;color:#60a5fa}
.ftr-desc{font-size:14px;color:#64748b;max-width:440px;margin:0 auto 20px;line-height:1.8}
.ftr-l{display:flex;justify-content:center;gap:20px;margin-bottom:18px;flex-wrap:wrap}
.ftr-l a{color:#94a3b8;font-size:14px;transition:color .2s}
.ftr-l a:hover{color:#f1f5f9}
.ftr-i{font-size:12px;color:#475569;line-height:2}
.ftr-i a{color:#64748b}
.ftr-i a:hover{color:#94a3b8}

/* ====== Hero ====== */
.hero{background:linear-gradient(160deg,#0f172a 0%,#1e3a5f 35%,#2563eb 70%,#06b6d4 100%);color:#fff;padding:80px 24px 64px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 70% 60% at 30% 40%,rgba(37,99,235,.2) 0%,transparent 70%),radial-gradient(ellipse 60% 50% at 70% 60%,rgba(6,182,212,.15) 0%,transparent 70%);pointer-events:none}
.hero-inner{max-width:var(--max-w);margin:0 auto;position:relative;z-index:1}
.hero h1{font-size:clamp(28px,4vw,42px);font-weight:800;letter-spacing:-.4px;line-height:1.15;margin-bottom:14px}
.hero h1 span{background:linear-gradient(90deg,#93c5fd,#2dd4bf);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p{font-size:clamp(14px,1.6vw,16px);opacity:.85;margin-bottom:28px;line-height:1.8;max-width:600px;margin-left:auto;margin-right:auto}

/* ====== Layout ====== */
.wrap{max-width:var(--max-w);margin:0 auto;padding:0 24px}
.sec{padding:48px 0}
.sec-hd{text-align:center;margin-bottom:36px}
.sec-hd h2{font-size:clamp(22px,2.5vw,28px);font-weight:700;color:var(--text)}
.sec-hd h2 em{font-style:normal;color:var(--primary)}
.sec-hd p{font-size:15px;color:var(--text-2);margin-top:6px;max-width:480px;margin-left:auto;margin-right:auto}

/* ====== Cards Grid ====== */
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.card{display:block;background:#fff;border-radius:14px;overflow:hidden;border:1px solid var(--border);text-decoration:none;color:inherit;transition:all .3s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--primary-light)}
.card-img{height:180px;background:linear-gradient(135deg,var(--primary-light),#cffafe);display:flex;align-items:center;justify-content:center;overflow:hidden}
.card-img img{width:100%;height:100%;object-fit:cover}
.card-body{padding:18px}
.card-title{font-size:16px;font-weight:600;color:var(--text);margin-bottom:6px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-desc{font-size:13px;color:var(--text-2);line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-link{margin-top:12px;font-size:13px;color:var(--primary);font-weight:600}

/* ====== CTA ====== */
.cta-section{text-align:center;background:linear-gradient(135deg,var(--primary-light),#dbeafe);border-radius:20px;padding:48px 24px}
.cta-btn{display:inline-flex;align-items:center;gap:8px;background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;padding:14px 36px;border-radius:50px;font-weight:600;font-size:15px;text-decoration:none;transition:all .25s;box-shadow:0 8px 24px rgba(37,99,235,.25)}
.cta-btn:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(37,99,235,.35);color:#fff}

/* ====== Breadcrumb ====== */
.bc{font-size:13px;color:var(--text-3);margin-bottom:24px}
.bc a{color:var(--text-3)}
.bc a:hover{color:var(--primary)}
.bc .sep{margin:0 6px}

/* ====== Article ====== */
.article-wrap{max-width:800px;margin:0 auto}
.article-wrap h1{font-size:clamp(24px,3vw,32px);margin-bottom:12px}
.article-meta{font-size:13px;color:var(--text-3);margin-bottom:24px;display:flex;gap:16px;flex-wrap:wrap}
.article-content{font-size:16px;line-height:1.9;color:#334155}
.article-content h2{font-size:22px;font-weight:700;margin:36px 0 16px;padding-bottom:8px;border-bottom:2px solid var(--border)}
.article-content h3{font-size:18px;font-weight:600;margin:28px 0 12px}
.article-content p{margin-bottom:16px}
.article-content img{border-radius:12px;margin:20px 0;box-shadow:var(--shadow)}
.article-content ul,.article-content ol{margin:16px 0;padding-left:24px}
.article-content li{margin-bottom:8px}
.article-content blockquote{border-left:4px solid var(--primary);padding:16px 20px;background:var(--primary-light);border-radius:0 12px 12px 0;margin:20px 0;font-style:italic;color:var(--text-2)}
.article-content a{color:var(--primary);text-decoration:underline;text-underline-offset:2px}
.article-content table{width:100%;border-collapse:collapse;margin:20px 0;border-radius:12px;overflow:hidden}
.article-content th,.article-content td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--border)}
.article-content th{background:var(--primary-light);font-weight:600}

/* ====== Product Detail ====== */
.pd-hero{background:linear-gradient(135deg,#f8fafc,#eef2ff,#f0f9ff);padding:40px 24px 48px}
.pd-grid{max-width:var(--max-w);margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.pd-img{border-radius:20px;overflow:hidden;background:#fff;box-shadow:var(--shadow-lg);aspect-ratio:4/3}
.pd-img img{width:100%;height:100%;object-fit:contain}
.pd-info{padding:8px 0}
.pd-badge{display:inline-flex;align-items:center;gap:6px;padding:6px 16px;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;border-radius:50px;font-size:12px;font-weight:600;margin-bottom:16px}
.pd-title{font-size:clamp(24px,3vw,32px);font-weight:800;line-height:1.25;margin-bottom:12px}
.pd-excerpt{font-size:15px;color:var(--text-2);line-height:1.7;margin-bottom:24px}
.pd-trust{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;padding:20px 0;border-top:1px solid var(--border);margin-top:24px}
.pd-trust-item{text-align:center}
.pd-trust-num{font-size:20px;font-weight:800;color:var(--primary)}
.pd-trust-label{font-size:11px;color:var(--text-3);margin-top:2px}

/* ====== Pagination ====== */
.pagination{display:flex;justify-content:center;gap:8px;margin-top:36px;flex-wrap:wrap}
.pagination a,.pagination span{padding:8px 14px;border-radius:8px;border:1px solid var(--border);color:var(--text-2);text-decoration:none;font-size:14px;transition:all .2s}
.pagination a:hover{background:var(--primary-light);border-color:var(--primary);color:var(--primary)}
.pagination .current{background:var(--primary);border-color:var(--primary);color:#fff;font-weight:600}

/* ====== Responsive ====== */
/* ====== 首页组件类（桌面+手机） v3.3 ====== */

/* 数据亮点 */
.stats-section{padding-top:0;padding-bottom:0;margin-top:-20px}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;max-width:700px;margin:0 auto}
.stat-card{background:#fff;border-radius:14px;padding:20px 12px;text-align:center;box-shadow:var(--shadow)}
.stat-num{font-size:28px;font-weight:800;color:var(--primary)}
.stat-label{font-size:13px;color:var(--text-2);margin-top:4px}

/* 产品分类 */
.cat-grid-home{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.cat-card{display:block;padding:28px 20px;border-radius:16px;text-decoration:none;color:inherit;transition:all .3s;border:1px solid transparent}
.cat-card:hover{transform:translateY(-4px);box-shadow:0 12px 32px rgba(0,0,0,.08)}
.cat-icon{font-size:32px;margin-bottom:10px}
.cat-name{font-size:16px;font-weight:700;margin-bottom:4px}
.cat-desc{font-size:13px;color:#64748b}

/* Hero按钮 */
.hero-btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* FAQ手风琴 */
.faq-wrap{max-width:800px;margin:0 auto}
.faq-item{margin-bottom:12px;background:#fff;border:1px solid #e2e8f0;border-radius:12px;overflow:hidden}
.faq-q{padding:16px 20px;font-size:15px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:12px;user-select:none;-webkit-user-select:none;-webkit-tap-highlight-color:transparent}
.faq-q::after{content:'＋';font-size:18px;color:var(--text-3);transition:transform .25s;flex-shrink:0}
.faq-item.open .faq-q::after{content:'－'}
.faq-a{padding:0 20px;font-size:14px;color:#475569;line-height:1.8;max-height:0;overflow:hidden;transition:max-height .35s ease,padding .35s ease}
.faq-item.open .faq-a{max-height:500px;padding:0 20px 16px}

/* CTA */
.home-cta{text-align:center;background:linear-gradient(135deg,var(--primary-light),#dbeafe);border-radius:20px;padding:48px 24px}
.home-cta h2{font-size:clamp(20px,3vw,24px);font-weight:700;margin-bottom:10px}
.home-cta p{font-size:15px;color:#475569;margin-bottom:20px}

/* ====== 手机端 <=768px ====== */
@media(max-width:768px){
    /* 导航 — 全屏毛玻璃抽屉 */
    .hdr{height:56px}
    .hri{height:56px;padding:0 16px}
    .hl{font-size:18px}
    .menu-toggle{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:8px;font-size:20px}
    .menu-toggle:active{background:var(--primary-light)}
    .hn{display:none;position:fixed;top:56px;left:0;right:0;bottom:0;background:rgba(255,255,255,.98);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);flex-direction:column;padding:16px;gap:0;z-index:99;overflow-y:auto}
    .hn.show{display:flex}
    .hn a{padding:14px 16px;font-size:16px;font-weight:500;border-radius:10px;color:var(--text)}
    .hn a:active{background:var(--primary-light)}
    .hn a.on{background:var(--primary);color:#fff}
    .hri{position:relative}

    /* Hero — 紧凑全宽 */
    .hero{padding:80px 20px 36px;min-height:auto}
    .hero h1{font-size:26px;line-height:1.25;margin-bottom:10px}
    .hero p{font-size:14px;line-height:1.7;margin-bottom:20px;opacity:.8}
    .hero-btns{flex-direction:column;align-items:stretch;gap:10px;padding:0 8px}
    .hero-btns .cta-btn{width:100%;justify-content:center;min-height:48px;font-size:16px;border-radius:12px;padding:14px 20px}

    /* 数据亮点 — 2×2 */
    .stats-section{margin-top:-16px}
    .stats-grid{grid-template-columns:repeat(2,1fr);gap:10px;max-width:100%}
    .stat-card{padding:16px 8px;border-radius:12px}
    .stat-num{font-size:24px}
    .stat-label{font-size:12px}

    /* 产品分类 — 2×2 */
    .cat-grid-home{grid-template-columns:repeat(2,1fr);gap:10px}
    .cat-card{padding:20px 14px;border-radius:14px;text-align:center}
    .cat-icon{font-size:28px;margin-bottom:8px}
    .cat-name{font-size:14px}
    .cat-desc{font-size:12px}

    /* 热门产品 — 单列卡片 */
    .card-grid{grid-template-columns:1fr;gap:14px}
    .card{display:grid;grid-template-columns:100px 1fr;gap:0;border-radius:12px}
    .card-img{height:100%;min-height:100px;border-radius:12px 0 0 12px}
    .card-body{padding:14px;display:flex;flex-direction:column;justify-content:center}
    .card-title{font-size:14px;margin-bottom:4px}
    .card-desc{font-size:12px;-webkit-line-clamp:2}
    .card-link{font-size:12px;margin-top:8px}

    /* FAQ — 手机紧凑 */
    .faq-wrap{max-width:100%;padding:0 4px}
    .faq-item{margin-bottom:10px;border-radius:10px}
    .faq-q{padding:14px 16px;font-size:14px}
    .faq-a{font-size:13px;padding:0 16px}
    .faq-item.open .faq-a{padding:0 16px 14px}

    /* CTA */
    .home-cta{padding:28px 16px;border-radius:14px}
    .home-cta h2{font-size:18px}
    .home-cta p{font-size:13px;margin-bottom:16px}
    .home-cta .cta-btn{width:100%;justify-content:center;min-height:48px;font-size:16px;border-radius:12px}

    /* 页脚 */
    .ftr{padding:28px 16px 20px;margin-top:40px}
    .ftr-brand{font-size:17px}
    .ftr-desc{font-size:12px;margin-bottom:14px}
    .ftr-l{gap:10px;margin-bottom:12px}
    .ftr-l a{font-size:12px}

    /* 通用section */
    .sec{padding:28px 0}
    .sec-hd{margin-bottom:20px}
    .sec-hd h2{font-size:20px}
    .sec-hd p{font-size:13px;margin-top:4px}
    .wrap{padding:0 16px}

    /* 面包屑 */
    .bc{font-size:12px;margin-bottom:16px}

    /* 文章页 */
    .article-content{font-size:15px}
    .article-content h2{font-size:18px;margin:24px 0 12px}

    /* 产品详情页 */
    .pd-grid{grid-template-columns:1fr;gap:20px}
    .pd-hero{padding:24px 16px 32px}
    .pd-title{font-size:22px}
    .pd-trust{grid-template-columns:repeat(2,1fr);gap:8px}
}

/* ====== 小屏手机 <=480px ====== */
@media(max-width:480px){
    .hero{padding:72px 16px 28px}
    .hero h1{font-size:22px}
    .hero p{font-size:13px}
    .sec{padding:20px 0}
    .wrap{padding:0 12px}
    .stats-grid{gap:8px}
    .stat-num{font-size:20px}
    .stat-label{font-size:11px}
    .cat-grid-home{gap:8px}
    .cat-card{padding:16px 10px}
    .cat-icon{font-size:24px}
    .cat-name{font-size:13px}
    .cat-desc{font-size:11px}
    .card{grid-template-columns:80px 1fr}
    .card-img{min-height:80px}
}