/* ==========================================================================
   潮發玉器 · 内容页公共样式（翡翠知识 / 加工案例 / 知识详情 kb-xx）
   玉器视觉：深绿 #1A5C4A/#082818 + 描金 #C9A960，米白底
   补齐 style.css（制造业模板）缺失的 navbar / 文章 / 案例 / 详情 / 页脚样式
   ========================================================================== */
:root{
  --primary:#1A5C4A; --primary-dark:#0F4030; --primary-deep:#082818;
  --accent:#C9A960; --text:#1f2430; --text-sub:#5b6472; --text-muted:#7a828f;
  --line:#e6e9ef; --bg:#f8f9fa; --radius:14px;
  --shadow:0 10px 30px rgba(20,30,50,.08);
}
.container{max-width:1140px}
.section{padding:64px 0}
.text-sub{color:var(--text-sub)}

/* ---------- 顶部导航 ---------- */
.navbar{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);opacity:1!important;transform:none!important;animation:none!important}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:70px}
.navbar .logo{display:flex;align-items:center;font-size:22px;font-weight:800;color:var(--primary-deep);letter-spacing:3px}
.navbar .logo img{height:42px;width:auto}
.navbar .logo::after{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);margin-left:7px;align-self:flex-start;margin-top:6px}
.nav-links{display:flex;align-items:center;list-style:none;gap:30px}
.nav-links a{font-size:15px;color:var(--text-sub);transition:color .2s}
.nav-links a:hover{color:var(--primary)}
.nav-links a.active{color:var(--primary);font-weight:700;position:relative}
.nav-links a.active::after{content:"";position:absolute;left:0;right:0;bottom:-26px;height:2px;background:var(--accent);border-radius:2px}
.nav-cta{background:var(--primary);color:#fff!important;padding:10px 24px;border-radius:999px;font-size:14px;font-weight:600;transition:all .2s;white-space:nowrap}
.nav-cta:hover{background:var(--primary-dark);transform:translateY(-1px)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.nav-toggle span{width:24px;height:2px;background:var(--primary-deep);border-radius:2px}

/* ---------- 页面头图 ---------- */
.page-hero{background:linear-gradient(135deg,var(--primary-deep) 0%,var(--primary) 70%,var(--primary-dark) 100%);color:#fff}
.page-hero h1{font-size:38px;font-weight:800;letter-spacing:1px}
.page-hero p{color:rgba(255,255,255,.82);font-size:16px}

/* ---------- 分类筛选 ---------- */
.kb-filter{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:32px}
.kb-filter button{font-family:inherit;font-size:14px;color:var(--text-sub);background:#fff;border:1px solid var(--line);border-radius:999px;padding:9px 20px;cursor:pointer;transition:all .2s;line-height:1.4}
.kb-filter button:hover{border-color:var(--primary);color:var(--primary)}
.kb-filter button.active{background:var(--primary);border-color:var(--primary);color:#fff;font-weight:600;box-shadow:0 6px 16px rgba(26,92,74,.25)}

/* ---------- 知识文章列表 ---------- */
.article-list{display:flex;flex-direction:column;gap:18px}
.article-item{display:flex;gap:20px;background:#fff;border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:0 12px 12px 0;padding:22px 26px;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.article-item:hover{transform:translateY(-3px);box-shadow:0 16px 40px rgba(20,30,50,.12);border-left-color:var(--primary)}
.article-cat{flex:0 0 auto;font-size:12.5px;color:var(--primary);background:rgba(26,92,74,.08);border-radius:6px;padding:4px 10px;height:fit-content;white-space:nowrap;font-weight:600}
.article-body{min-width:0}
.article-body h3{font-size:18px;font-weight:700;margin-bottom:8px;line-height:1.5}
.article-body h3 a{color:var(--primary-deep);transition:color .2s}
.article-body h3 a:hover{color:var(--primary)}
.article-body p{font-size:14.5px;color:var(--text-sub);line-height:1.8;margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.article-meta{display:flex;flex-wrap:wrap;gap:18px;margin-top:12px;font-size:13px;color:var(--text-muted)}

/* ---------- 案例网格 ---------- */
.cases-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.cases-grid .case-card,.cases-grid .case-item{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.cases-grid .case-card:hover,.cases-grid .case-item:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(20,30,50,.12)}
.cases-grid img{width:100%;height:210px;object-fit:cover;display:block}
.cases-grid .case-body{padding:20px 22px}
.cases-grid h3{font-size:17px;color:var(--primary-deep);margin-bottom:8px}
.cases-grid p{font-size:14px;color:var(--text-sub);line-height:1.7}

/* ---------- 知识详情 ---------- */
.detail-section{padding:56px 0 32px;background:linear-gradient(180px,#fff 0%,var(--bg) 100%)}
.article-detail{max-width:820px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:16px;padding:44px 52px;box-shadow:var(--shadow)}
.back-link{display:inline-block;color:var(--primary);font-size:14px;font-weight:600;margin-bottom:20px}
.back-link:hover{text-decoration:underline}
.article-detail>h1{font-size:30px;line-height:1.4;color:var(--primary-deep);font-weight:800;margin-bottom:14px}
.article-detail .article-meta{margin-bottom:28px;padding-bottom:20px;border-bottom:1px solid var(--line)}
.article-detail .article-body{font-size:16px;color:#333b48;line-height:1.95}
.article-detail .article-body p{margin:0 0 18px}
.article-detail .article-body h2{font-size:22px;color:var(--primary-deep);margin:32px 0 14px;font-weight:700}
.article-detail .article-body h3{font-size:18px;color:var(--primary);margin:26px 0 12px;font-weight:700}
.article-detail .article-body ul,.article-detail .article-body ol{margin:0 0 18px;padding-left:24px}
.article-detail .article-body li{margin-bottom:8px}
.article-detail .article-body strong{color:var(--primary-deep)}
.article-detail .article-body img{max-width:100%;border-radius:10px;margin:14px 0}
.qa{margin:24px 0;padding:20px 24px;background:var(--bg);border-radius:12px;border-left:3px solid var(--accent)}
.qa:empty,.qa:not(:has(*)){display:none}

/* 上一篇/下一篇 */
.article-nav{display:flex;justify-content:space-between;gap:18px;margin:36px 0 8px;flex-wrap:wrap}
.article-nav-item{flex:1;min-width:240px;background:var(--bg);border-radius:10px;padding:16px 20px}
.article-nav-item.next{text-align:right}
.nav-label{font-size:12.5px;color:var(--text-muted);margin-bottom:6px}
.nav-title{font-size:15px;font-weight:600;color:var(--primary-deep)}
.nav-title a:hover{color:var(--primary)}

/* 相关阅读 */
.related-head{font-size:19px;color:var(--primary-deep);margin:36px 0 16px;font-weight:700}
.related-list{display:grid;grid-template-columns:1fr;gap:12px}
.related-item{display:flex;align-items:center;gap:14px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px 18px;transition:all .2s}
.related-item:hover{border-color:var(--primary);transform:translateX(3px)}
.related-tag{flex:0 0 auto;font-size:12px;color:var(--primary);background:rgba(26,92,74,.08);border-radius:6px;padding:3px 10px;white-space:nowrap}
.related-title{font-size:15px;color:var(--text);font-weight:600}

/* CTA */
.cta-panel{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-deep) 100%);border-radius:18px;padding:48px 32px;text-align:center;color:#fff;box-shadow:0 20px 50px rgba(8,40,24,.25)}
.cta-panel h2{color:#fff;font-size:27px;font-weight:800;margin-bottom:12px}
.cta-panel p{color:rgba(255,255,255,.85);font-size:15.5px;margin-bottom:26px}
.cta-actions{display:flex;justify-content:center;gap:14px;flex-wrap:wrap}
.btn-primary{display:inline-block;background:var(--accent);color:#fff!important;padding:13px 32px;border-radius:999px;font-weight:700;font-size:15px;transition:all .2s}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(0,0,0,.22)}

/* ---------- 页脚 ---------- */
footer{background:var(--primary-deep);color:rgba(255,255,255,.66);padding:48px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:28px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer-logo{font-size:20px;font-weight:800;color:#fff;letter-spacing:2px;margin-bottom:14px}
.footer-logo img{height:40px;margin-bottom:14px}
.footer-brand p{font-size:13.5px;line-height:1.8;max-width:300px}
.footer-col h4{color:var(--accent);font-size:15px;margin-bottom:14px;font-weight:700}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:9px;font-size:13.5px}
.footer-col a:hover{color:#fff}
.footer-contact li{display:flex;gap:8px;align-items:flex-start}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding-top:22px;font-size:12.5px;flex-wrap:wrap;gap:10px}
.footer-bottom a:hover{color:#fff}

/* ---------- 滚动动效（玉器绿金，覆盖蓝橙） ---------- */
#scroll-progress i{background:linear-gradient(90deg,var(--primary),var(--accent));box-shadow:0 0 12px rgba(26,92,74,.6)}
#mouse-glow{background:radial-gradient(circle,rgba(26,92,74,.08) 0%,rgba(26,92,74,.02) 40%,transparent 68%)}
.fade-in{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.2,1)}
.fade-in.visible{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media(max-width:900px){
  .cases-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .article-detail{padding:32px 26px}
}
@media(max-width:768px){
  .nav-toggle{display:flex}
  .nav-links{display:none;position:absolute;top:70px;left:0;right:0;background:#fff;flex-direction:column;align-items:flex-start;gap:0;padding:8px 24px 16px;border-bottom:1px solid var(--line);box-shadow:0 12px 24px rgba(0,0,0,.08)}
  .nav-links.open{display:flex}
  .nav-links li{width:100%}
  .nav-links a{display:block;padding:12px 0;margin:0!important}
  .nav-links a.active::after{display:none}
  .nav-cta{display:none}
  .page-hero h1{font-size:28px}
  .article-item{flex-direction:column;gap:12px;padding:18px 20px}
  .article-cat{align-self:flex-start}
  .cases-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .footer-bottom{justify-content:flex-start}
  .article-detail{padding:26px 20px}
  .article-detail>h1{font-size:24px}
  .article-nav-item{min-width:100%}
}