/* 华星建材官网 v4 — 工业风配色系统 */
:root {
  --color-primary: #1A2B3C;
  --color-secondary: #2C3E50;
  --color-accent: #E85D25;
  --color-accent-hover: #C94E1E;
  --color-bg: #F5F5F3;
  --color-surface: #FFFFFF;
  --color-text: #2B2B2B;
  --color-text-light: #5A6C7D;
  --color-text-muted: #8899AA;
  --color-border: #D8D8D5;
  --radius: 4px;
  --radius-md: 8px;
  --shadow-sm: 0 1px 3px rgba(26,43,60,0.08);
  --shadow-md: 0 4px 16px rgba(26,43,60,0.10);
  --shadow-lg: 0 8px 32px rgba(26,43,60,0.14);
  --maxw: 1120px;
  --ease: 0.2s ease;
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--color-text);line-height:1.75;background:var(--color-bg);-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}

/* ═══════════ 链接基准 ═══════════ */
a{text-decoration:none;color:var(--color-primary);transition:color var(--ease)}
a:hover{color:var(--color-accent)}
p a,li a,.content a{text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--color-border)}
p a:hover,li a:hover,.content a:hover{text-decoration-color:var(--color-accent)}

/* ═══════════ 按钮 ═══════════ */
.btn{display:inline-block;padding:13px 28px;border-radius:var(--radius);font-size:15px;font-weight:700;transition:all var(--ease);cursor:pointer;font-family:inherit;border:none;text-decoration:none;white-space:nowrap}
.btn-primary{background:var(--color-accent);color:#fff}
.btn-primary:hover{background:var(--color-accent-hover);color:#fff;box-shadow:0 4px 14px rgba(232,93,37,0.35);transform:translateY(-1px)}
.btn-outline{background:transparent;color:#fff;border:2px solid rgba(255,255,255,0.5)}
.btn-outline:hover{background:rgba(255,255,255,0.1);color:#fff;border-color:#fff}
.btn-ghost{background:transparent;color:var(--color-primary);border:2px solid var(--color-border)}
.btn-ghost:hover{background:var(--color-primary);color:#fff;border-color:var(--color-primary)}

/* ═══════════ Header ═══════════ */
.site-header{position:sticky;top:0;z-index:100;background:var(--color-surface);border-bottom:1px solid var(--color-border);box-shadow:var(--shadow-sm)}
.header-inner{max-width:var(--maxw);margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:0 16px;height:64px}
.header-logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--color-primary)}
.header-logo:hover{color:var(--color-primary)}
.header-logo .logo-mark{width:38px;height:38px;background:var(--color-primary);color:#fff;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;font-size:19px;font-weight:900;flex-shrink:0}
.header-logo small{display:block;font-size:10px;color:var(--color-text-light);font-weight:400;letter-spacing:1.5px}
.header-nav{display:flex;align-items:center;gap:24px}
.header-nav a{color:var(--color-text);font-size:15px;font-weight:500;padding:6px 0;transition:color var(--ease);text-decoration:none}
.header-nav a:hover{color:var(--color-accent)}
.header-cta{background:var(--color-accent);color:#fff!important;padding:10px 20px!important;border-radius:var(--radius);font-weight:700!important;font-size:14px!important}
.header-cta:hover{background:var(--color-accent-hover)!important;color:#fff!important}
.menu-toggle,.menu-btn{display:none}
.menu-btn{cursor:pointer;padding:10px;border:none;background:none}
.menu-btn span{display:block;width:22px;height:2px;background:var(--color-primary);margin:5px 0;transition:0.2s}

/* ═══════════ Hero ═══════════ */
.hero{position:relative;overflow:hidden;background:linear-gradient(160deg,var(--color-primary) 0%,var(--color-secondary) 60%,#1a2838 100%);color:#fff;padding:96px 16px 88px}
.hero::before{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:radial-gradient(ellipse at 25% 30%,rgba(255,255,255,0.04) 0%,transparent 60%),radial-gradient(ellipse at 75% 80%,rgba(232,93,37,0.08) 0%,transparent 50%);pointer-events:none}
.hero-inner{max-width:720px;margin:0 auto;text-align:center;position:relative;z-index:1}
.hero .badge{display:inline-block;background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.18);border-radius:50px;padding:6px 22px;font-size:12px;letter-spacing:2.5px;margin-bottom:24px;text-transform:uppercase}
.hero h1{font-size:clamp(28px,5vw,44px);font-weight:800;line-height:1.25;margin-bottom:16px}
.hero h1 em{font-style:normal;color:var(--color-accent)}
.hero .sub{font-size:clamp(14px,2vw,17px);color:rgba(255,255,255,0.72);max-width:560px;margin:0 auto 32px;line-height:1.7}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ═══════════ 信任条 ═══════════ */
.trust-bar{background:var(--color-surface);border-bottom:1px solid var(--color-border)}
.trust-bar-inner{max-width:var(--maxw);margin:0 auto;display:grid;grid-template-columns:repeat(4,1fr);text-align:center;padding:0}
.trust-item{padding:24px 12px;display:flex;flex-direction:column;align-items:center;gap:6px}
.trust-item+.trust-item{border-left:1px solid var(--color-border)}
.trust-item .t-icon{font-size:24px;line-height:1}
.trust-item .t-num{font-size:28px;font-weight:900;color:var(--color-primary);line-height:1.2}
.trust-item .t-num em{font-style:normal;font-size:16px;color:var(--color-accent);font-weight:700}
.trust-item .t-label{font-size:13px;color:var(--color-text-light)}

/* ═══════════ 通用区块 ═══════════ */
.container{max-width:var(--maxw);margin:0 auto;padding:0 16px}
.section{padding:64px 0}
.section.alt{background:var(--color-surface)}
.sec-head{text-align:center;margin-bottom:44px}
.sec-head h2{font-size:28px;color:var(--color-primary);font-weight:800;margin-bottom:8px}
.sec-head p{color:var(--color-text-light);font-size:15px;max-width:540px;margin:0 auto}

/* ═══════════ 产品分类网格 ═══════════ */
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.cat-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:28px 22px;transition:all var(--ease);cursor:pointer;text-decoration:none;color:var(--color-text);display:flex;flex-direction:column}
.cat-card:hover{border-color:var(--color-accent);box-shadow:var(--shadow-md);transform:translateY(-4px)}
.cat-card .cat-icon{margin-bottom:16px}
.cat-card .cat-icon svg{width:44px;height:44px}
.cat-card h3{font-size:16px;font-weight:700;color:var(--color-primary);margin-bottom:6px}
.cat-card h3 a{color:var(--color-primary);text-decoration:none}
.cat-card h3 a:hover{color:var(--color-accent)}
.cat-card p{font-size:13px;color:var(--color-text-light);line-height:1.65;margin-bottom:12px;flex:1}
.cat-card .cat-brands{display:flex;flex-wrap:wrap;gap:5px}
.cat-card .cat-brands a{display:inline-block;padding:3px 10px;background:rgba(26,43,60,0.05);border-radius:20px;font-size:11px;font-weight:600;color:var(--color-text-light);text-decoration:none}
.cat-card .cat-brands a:hover{background:var(--color-accent);color:#fff}

/* ═══════════ 品牌系列推荐 ═══════════ */
.series-block{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:24px;margin-bottom:20px}
.series-block-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;flex-wrap:wrap;gap:10px}
.series-block-header .sb-brand{display:flex;align-items:center;gap:10px}
.series-block-header .sb-brand img{width:32px;height:32px;object-fit:contain;border-radius:4px}
.series-block-header .sb-brand h3{font-size:17px;font-weight:700;color:var(--color-primary)}
.series-block-header .sb-link{font-size:12px;color:var(--color-accent);font-weight:600;text-decoration:none}
.series-block-header .sb-link:hover{text-decoration:underline}
.series-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}
.series-card{background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius);padding:18px;transition:all var(--ease)}
.series-card:hover{border-color:var(--color-accent);box-shadow:var(--shadow-sm)}
.series-card .sc-name{font-size:15px;font-weight:700;color:var(--color-primary);margin-bottom:4px}
.series-card .sc-tier{display:inline-block;font-size:11px;font-weight:700;padding:2px 8px;border-radius:3px;margin-bottom:10px}
.series-card .sc-tier.premium{background:rgba(232,93,37,0.1);color:var(--color-accent)}
.series-card .sc-tier.mid{background:rgba(26,43,60,0.08);color:var(--color-primary)}
.series-card .sc-desc{font-size:12px;color:var(--color-text-light);line-height:1.7;margin-bottom:8px}
.series-card .sc-tags{display:flex;flex-wrap:wrap;gap:4px}
.series-card .sc-tags span{font-size:10px;padding:2px 7px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:3px;color:var(--color-text-light)}

/* ═══════════ 服务优势 ═══════════ */
.advantages{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.adv-item{padding:32px 20px}
.adv-item .adv-icon{font-size:32px;margin-bottom:14px;line-height:1}
.adv-item h3{font-size:16px;font-weight:700;color:var(--color-primary);margin-bottom:8px}
.adv-item p{font-size:13px;color:var(--color-text-light);line-height:1.6}

/* ═══════════ 品牌墙 ═══════════ */
.brand-wall{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;max-width:var(--maxw);margin:0 auto}
.brand-card{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:20px 12px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);text-align:center;transition:all var(--ease);text-decoration:none;color:var(--color-text);min-height:120px}
.brand-card:hover{border-color:var(--color-accent);box-shadow:var(--shadow-md);transform:translateY(-2px)}
.brand-card .b-logo{font-size:20px;font-weight:900;color:var(--color-primary);margin-bottom:6px;line-height:1.2}
.brand-card .b-name{font-size:13px;font-weight:700;color:var(--color-primary);margin-top:2px}
.brand-card .b-tag{font-size:11px;color:var(--color-text-muted);margin-top:2px}
.brand-card .b-link{font-size:10px;color:var(--color-accent);margin-top:4px;text-decoration:none}

/* ═══════════ 品牌墙 v2 — 分类+官网配色 ═══════════ */
.brand-category{margin-bottom:40px}
.brand-cat-title{font-size:20px;font-weight:700;color:var(--color-primary);margin-bottom:20px;padding-bottom:10px;border-bottom:2px solid var(--color-accent);display:inline-block}
.brand-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}
.brand-card-v2{display:block;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:20px;transition:all var(--ease);text-decoration:none;color:var(--color-text);position:relative;overflow:hidden}
.brand-card-v2::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:var(--brand-color,#1A2B3C)}
.brand-card-v2:hover{border-color:var(--brand-color,#1A2B3C);box-shadow:0 8px 24px rgba(0,0,0,0.12);transform:translateY(-3px)}
.bc-header{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.bc-logo{width:44px;height:44px;border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:900;font-size:14px;flex-shrink:0}
.bc-name{font-size:16px;font-weight:700;color:var(--color-primary)}
.bc-desc{font-size:13px;color:var(--color-text-light);line-height:1.6;margin-bottom:12px;min-height:40px}
.bc-tag{display:inline-block;padding:4px 10px;background:var(--brand-color,#1A2B3C);color:#fff;font-size:11px;font-weight:600;border-radius:12px;opacity:0.9}

/* ═══════════ 博客系统 ═══════════ */
/* 博客首页 */
.blog-cats{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:32px}
.blog-cat{padding:8px 18px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:20px;font-size:14px;color:var(--color-text);text-decoration:none;transition:all var(--ease)}
.blog-cat:hover,.blog-cat.active{background:var(--color-accent);color:#fff;border-color:var(--color-accent)}
.blog-list{display:grid;gap:20px}
.blog-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:24px;transition:all var(--ease)}
.blog-card:hover{border-color:var(--color-accent);box-shadow:var(--shadow-md)}
.blog-card-header{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.blog-tag{padding:4px 12px;border-radius:12px;font-size:12px;font-weight:600;color:#fff}
.blog-date{font-size:13px;color:var(--color-text-muted)}
.blog-title{font-size:20px;font-weight:700;margin-bottom:10px;line-height:1.4}
.blog-title a{color:var(--color-primary);text-decoration:none}
.blog-title a:hover{color:var(--color-accent)}
.blog-excerpt{font-size:14px;color:var(--color-text-light);line-height:1.7;margin-bottom:14px}
.blog-meta{display:flex;gap:16px;font-size:13px;color:var(--color-text-muted)}
.blog-pagination{display:flex;justify-content:center;align-items:center;gap:8px;margin-top:40px}
.blog-pagination a,.page-current{padding:8px 14px;border:1px solid var(--color-border);border-radius:var(--radius);text-decoration:none;color:var(--color-text);font-size:14px}
.page-current{background:var(--color-accent);color:#fff;border-color:var(--color-accent)}
.blog-pagination a:hover{border-color:var(--color-accent);color:var(--color-accent)}
.page-next{background:var(--color-primary);color:#fff;border-color:var(--color-primary)}

/* 文章详情页 */
.article{max-width:800px;margin:0 auto;padding:40px 16px}
.article-header{margin-bottom:32px;padding-bottom:24px;border-bottom:1px solid var(--color-border)}
.article-meta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:16px}
.article-tag{padding:4px 12px;border-radius:12px;font-size:12px;font-weight:600;color:#fff}
.article-date,.article-read{font-size:13px;color:var(--color-text-muted)}
.article-title{font-size:32px;font-weight:900;color:var(--color-primary);line-height:1.3;margin-bottom:16px}
.article-excerpt{font-size:16px;color:var(--color-text-light);line-height:1.8;margin-bottom:16px}
.article-author{display:flex;gap:16px;font-size:14px;color:var(--color-text-muted)}
.article-toc{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:20px 24px;margin-bottom:32px}
.article-toc h2{font-size:16px;font-weight:700;color:var(--color-primary);margin-bottom:12px}
.article-toc ol{padding-left:20px}
.article-toc li{margin-bottom:8px;font-size:14px}
.article-toc a{color:var(--color-text-light);text-decoration:none}
.article-toc a:hover{color:var(--color-accent)}
.article-content h2{font-size:24px;font-weight:700;color:var(--color-primary);margin:40px 0 16px;padding-top:20px;border-top:1px solid var(--color-border)}
.article-content h2:first-child{margin-top:0;padding-top:0;border-top:none}
.article-content h3{font-size:18px;font-weight:700;color:var(--color-primary);margin:28px 0 12px}
.article-content h4{font-size:16px;font-weight:700;color:var(--color-primary);margin:20px 0 10px}
.article-content p{font-size:15px;color:var(--color-text);line-height:1.9;margin-bottom:16px}
.article-content ul,.article-content ol{padding-left:24px;margin-bottom:16px}
.article-content li{font-size:15px;color:var(--color-text);line-height:1.8;margin-bottom:8px}
.article-content strong{color:var(--color-primary)}
.article-content table{width:100%;margin:20px 0;border-collapse:collapse}
.article-content th{background:var(--color-primary);color:#fff;padding:12px;text-align:left;font-size:14px}
.article-content td{padding:12px;border-bottom:1px solid var(--color-border);font-size:14px}
.article-content tr:nth-child(even){background:var(--color-bg)}
.article-related{margin-top:48px;padding-top:32px;border-top:1px solid var(--color-border)}
.article-related h2{font-size:20px;font-weight:700;color:var(--color-primary);margin-bottom:20px}
.related-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.related-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:16px;text-decoration:none;transition:all var(--ease)}
.related-card:hover{border-color:var(--color-accent);box-shadow:var(--shadow-md)}
.related-tag{display:inline-block;padding:2px 10px;border-radius:10px;font-size:11px;font-weight:600;color:#fff;margin-bottom:10px}
.related-card h3{font-size:15px;font-weight:700;color:var(--color-primary);margin-bottom:8px;line-height:1.4}
.related-card p{font-size:13px;color:var(--color-text-light);line-height:1.5}
.article-footer{margin-top:40px;padding-top:24px;border-top:1px solid var(--color-border)}
.author-card{display:flex;gap:16px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:20px}
.author-avatar{width:56px;height:56px;background:var(--color-primary);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:24px;font-weight:900;flex-shrink:0}
.author-info h3{font-size:16px;font-weight:700;color:var(--color-primary);margin-bottom:8px}
.author-info p{font-size:14px;color:var(--color-text-light);line-height:1.7;margin-bottom:8px}
.author-info a{color:var(--color-accent);text-decoration:none}

/* ═══════════ CTA 底栏 ═══════════ */
.cta-band{background:var(--color-primary);color:#fff;text-align:center;padding:56px 16px}
.cta-band h2{font-size:24px;margin-bottom:8px;font-weight:800}
.cta-band p{color:rgba(255,255,255,0.7);margin-bottom:24px;font-size:15px}
.cta-band .btn-primary{font-size:16px;padding:14px 36px}

/* ═══════════ Footer ═══════════ */
.site-footer{background:var(--color-primary);color:rgba(255,255,255,0.7);padding:52px 16px 24px}
.footer-grid{max-width:var(--maxw);margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px}
.footer-brand{font-size:20px;font-weight:800;color:#fff;margin-bottom:10px}
.footer-desc{font-size:13px;line-height:1.9;max-width:320px}
.footer-col h4{color:#fff;font-size:14px;font-weight:700;margin-bottom:12px}
.footer-col ul{list-style:none}
.footer-col ul li{margin-bottom:7px}
.footer-col ul a{color:rgba(255,255,255,0.6);font-size:13px;text-decoration:none;transition:color var(--ease)}
.footer-col ul a:hover{color:var(--color-accent)}
.footer-bottom{max-width:var(--maxw);margin:32px auto 0;padding-top:20px;border-top:1px solid rgba(255,255,255,0.1);text-align:center;font-size:12px;color:rgba(255,255,255,0.35)}

/* ═══════════ 浮动按钮 ═══════════ */
.float-call{position:fixed;bottom:24px;right:24px;z-index:200;width:52px;height:52px;background:var(--color-accent);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 18px rgba(232,93,37,0.4);font-size:22px;transition:transform var(--ease)}
.float-call:hover{transform:scale(1.1);color:#fff}
.back-top{position:fixed;bottom:88px;right:24px;z-index:199;width:38px;height:38px;background:var(--color-surface);color:var(--color-text-light);border:1px solid var(--color-border);border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;opacity:0;transition:opacity 0.3s}
.back-top.show{opacity:1}

/* ═══════════ 子页面（品类页）复用 ═══════════ */
.page-hero{background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));color:#fff;padding:52px 16px;text-align:center;position:relative;overflow:hidden}
.page-hero h1{font-size:clamp(24px,4vw,34px);position:relative;z-index:1;font-weight:800}
.page-hero p{color:rgba(255,255,255,0.75);margin-top:8px;font-size:14px;position:relative;z-index:1}
.breadcrumb{font-size:12px;color:rgba(255,255,255,0.55);margin-top:12px;position:relative;z-index:1}
.breadcrumb a{color:rgba(255,255,255,0.75);text-decoration:none}
.breadcrumb a:hover{color:#fff}

.brand-table{width:100%;border-collapse:collapse;font-size:14px}
.brand-table th{background:var(--color-primary);color:#fff;padding:11px 14px;text-align:left;font-weight:600}
.brand-table th:first-child{border-radius:var(--radius-md) 0 0 0}
.brand-table th:last-child{border-radius:0 var(--radius-md) 0 0}
.brand-table td{padding:11px 14px;border-bottom:1px solid var(--color-border)}
.brand-table tr:hover td{background:rgba(26,43,60,0.02)}

.brand-detail{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:22px;margin-bottom:18px}
.brand-detail .bd-header{display:flex;align-items:center;gap:14px;margin-bottom:12px}
.brand-detail .bd-logo{width:56px;height:44px;background:rgba(26,43,60,0.06);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;font-weight:900;font-size:13px;color:var(--color-primary)}
.brand-detail .bd-name{font-size:17px;font-weight:700;color:var(--color-primary)}
.brand-detail .bd-full{font-size:12px;color:var(--color-text-muted)}
.brand-detail .bd-desc{font-size:14px;color:var(--color-text-light);line-height:1.8;margin-bottom:10px}
.brand-detail .bd-advantages{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:10px}
.brand-detail .bd-advantages span{display:inline-block;padding:4px 10px;background:rgba(232,93,37,0.06);border:1px solid rgba(232,93,37,0.15);border-radius:20px;font-size:11px;font-weight:600;color:var(--color-accent)}
.brand-detail .bd-links{font-size:13px}
.brand-detail .bd-links a{color:var(--color-primary);font-weight:600;text-decoration:underline;text-underline-offset:2px}
.brand-detail .bd-links a:hover{color:var(--color-accent)}

.trust-strip{display:flex;justify-content:center;flex-wrap:wrap;gap:28px 40px;padding:24px 16px}
.trust-strip .trust-item{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--color-text);padding:0;border:none;flex-direction:row}

.faq{border:1px solid var(--color-border);border-radius:var(--radius-md);padding:16px 20px;margin-bottom:8px;background:var(--color-surface)}
.faq[open]{border-color:var(--color-primary)}
.faq summary{font-weight:700;font-size:14px;cursor:pointer;color:var(--color-primary);list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:'+ ';color:var(--color-accent);font-weight:900;font-size:17px}
.faq[open] summary::before{content:'- '}
.faq .a{margin-top:10px;color:var(--color-text-light);font-size:13px;line-height:1.8}

/* ═══════════ 旧版导航兼容（topbar + nav-wrap 标记，首页外全站在用） ═══════════ */
.topbar{background:var(--color-primary);color:rgba(255,255,255,.85);font-size:13px;text-align:center;padding:7px 16px}
.topbar a{color:#fff;font-weight:600;text-decoration:none}
.topbar a:hover{color:var(--color-accent)}
.nav-wrap{position:sticky;top:0;z-index:100;background:var(--color-surface);border-bottom:1px solid var(--color-border);box-shadow:var(--shadow-sm)}
.nav{max-width:var(--maxw);margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:0 16px;height:64px}
.brand-link{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--color-primary);text-decoration:none}
.brand-link:hover{color:var(--color-primary)}
.brand-link .logo{width:38px;height:38px;background:var(--color-primary);color:#fff;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;font-size:19px;font-weight:900;flex-shrink:0}
.brand-link small{display:block;font-size:10px;color:var(--color-text-light);font-weight:400;letter-spacing:1.5px}
.nav-links{display:flex;align-items:center;gap:24px;list-style:none}
.nav-links a{color:var(--color-text);font-size:15px;font-weight:500;padding:6px 0;text-decoration:none}
.nav-links a:hover{color:var(--color-accent)}
.nav-links .nav-cta{background:var(--color-accent);color:#fff;padding:10px 20px;border-radius:var(--radius);font-weight:700;font-size:14px}
.nav-links .nav-cta:hover{background:var(--color-accent-hover);color:#fff}

/* ═══════════ 旧版页脚兼容（foot 标记） ═══════════ */
body>footer{background:var(--color-primary)}
.foot{max-width:var(--maxw);margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;padding:52px 16px 24px;color:rgba(255,255,255,.7)}
.brand-foot{font-size:20px;font-weight:800;color:#fff;margin-bottom:10px}
.foot .desc{font-size:13px;line-height:1.9;max-width:320px}
.foot-h{color:#fff;font-size:14px;font-weight:700;margin-bottom:12px}
.foot ul{list-style:none}
.foot ul li{margin-bottom:7px}
.foot ul a{color:rgba(255,255,255,.6);font-size:13px;text-decoration:none;transition:color var(--ease)}
.foot ul a:hover{color:var(--color-accent)}
.foot-bottom{border-top:1px solid rgba(255,255,255,.1);text-align:center;font-size:12px;color:rgba(255,255,255,.35);padding:20px 16px 24px}

/* ═══════════ 响应式 ═══════════ */
@media(max-width:960px){
  .cat-grid{grid-template-columns:repeat(2,1fr)}
  .advantages{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .header-nav{display:none;position:absolute;top:64px;left:0;right:0;background:var(--color-surface);flex-direction:column;padding:8px 16px 16px;border-bottom:2px solid var(--color-border);box-shadow:var(--shadow-lg);gap:0}
  .header-nav a{padding:10px 0;font-size:16px;border-bottom:1px solid var(--color-border)}
  .header-nav a:last-child{border-bottom:none}
  .menu-btn{display:block}
  .menu-toggle:checked~.header-nav{display:flex}
  .nav-links{display:none;position:absolute;top:64px;left:0;right:0;background:var(--color-surface);flex-direction:column;padding:8px 16px 16px;border-bottom:2px solid var(--color-border);box-shadow:var(--shadow-lg);gap:0}
  .nav-links li{width:100%}
  .nav-links a{display:block;padding:10px 0;font-size:16px;border-bottom:1px solid var(--color-border)}
  .nav-links li:last-child a{border-bottom:none}
  .nav-links .nav-cta{text-align:center;margin-top:8px}
  .menu-toggle:checked~.nav-links{display:flex}
  .foot{grid-template-columns:1fr;gap:28px;padding:40px 16px 16px}
  .cat-grid{grid-template-columns:1fr}
  .advantages{grid-template-columns:1fr}
  .trust-bar-inner{grid-template-columns:repeat(2,1fr)}
  .trust-item:nth-child(3){border-left:none}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .hero{padding:72px 16px 64px}
  .hero h1{font-size:clamp(24px,6vw,34px)}
  .brand-wall{grid-template-columns:repeat(3,1fr)}
  .brand-grid{grid-template-columns:repeat(2,1fr)}
}
/* ═══════════ 变量别名（场景页/区域页内联样式在用） ═══════════ */
:root{
  --primary:var(--color-primary);
  --secondary:var(--color-secondary);
  --accent:var(--color-accent);
  --bg:var(--color-bg);
  --surface:var(--color-surface);
  --border:var(--color-border);
  --text:var(--color-text);
  --text-2:var(--color-text-light);
  --text-muted:var(--color-text-muted);
}

/* ═══════════ CTA 底栏按钮适配深色底 ═══════════ */
.btn-gold{background:var(--color-accent);color:#fff}
.btn-gold:hover{background:var(--color-accent-hover);color:#fff;box-shadow:0 4px 14px rgba(232,93,37,0.35);transform:translateY(-1px)}
.cta-band .btn-ghost{color:#fff;border-color:rgba(255,255,255,0.5)}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,0.12);color:#fff;border-color:#fff}

@media(max-width:480px){
  .brand-wall{grid-template-columns:repeat(2,1fr)}
  .brand-grid{grid-template-columns:1fr}
  .trust-bar-inner{grid-template-columns:1fr 1fr}
  .hero-actions{flex-direction:column;align-items:center}
}