/* JUHUA Polisher - Main Stylesheet */
:root {
  --blue-dark: #0d2a6e;
  --blue-mid:  #1a4db8;
  --blue-light:#2e6dd4;
  --silver:    #c8d4e8;
  --white:     #ffffff;
  --gray-bg:   #f4f6fb;
  --gray-text: #444;
  --border:    #dde3ef;
  --cta:       #e84c0e;
  --cta-hover: #c53c08;
}

*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Segoe UI',Arial,sans-serif;color:var(--gray-text);background:#fff;line-height:1.6}
a{color:var(--blue-mid);text-decoration:none}
a:hover{color:var(--blue-light)}
img{max-width:100%;display:block}

/* ---------- NAV ---------- */
header{background:var(--blue-dark);position:sticky;top:0;z-index:100;box-shadow:0 2px 8px rgba(0,0,0,.3)}
.nav-inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:0 24px;height:64px}
.logo img{height:44px;width:auto}
nav{display:flex;gap:28px;align-items:center}
nav a{color:var(--silver);font-size:.95rem;font-weight:500;letter-spacing:.03em;padding:4px 0;border-bottom:2px solid transparent;transition:border-color .2s,color .2s}
nav a:hover,nav a.active{color:#fff;border-bottom-color:var(--blue-light)}
.nav-cta{background:var(--cta);color:#fff!important;padding:8px 18px!important;border-radius:4px;border-bottom:none!important;font-weight:600!important}
.nav-cta:hover{background:var(--cta-hover)!important}

/* ---------- HERO ---------- */
.hero{background:linear-gradient(135deg,var(--blue-dark) 0%,var(--blue-mid) 60%,var(--blue-light) 100%);color:#fff;padding:80px 24px 60px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;inset:0;background:url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 800 200"><path d="M0,100 Q200,20 400,100 T800,100 V200 H0Z" fill="rgba(255,255,255,.04)"/></svg>') bottom/cover no-repeat}
.hero h1{font-size:2.6rem;font-weight:800;letter-spacing:-.01em;max-width:800px;margin:0 auto 16px;text-shadow:0 2px 8px rgba(0,0,0,.3)}
.hero p{font-size:1.15rem;max-width:640px;margin:0 auto 32px;opacity:.9}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 30px;border-radius:5px;font-weight:700;font-size:1rem;transition:all .2s}
.btn-primary{background:var(--cta);color:#fff;box-shadow:0 4px 16px rgba(232,76,14,.4)}
.btn-primary:hover{background:var(--cta-hover);color:#fff;transform:translateY(-1px)}
.btn-outline{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.6)}
.btn-outline:hover{background:rgba(255,255,255,.12);color:#fff}

/* ---------- TRUST BAR ---------- */
.trust-bar{background:var(--blue-dark);padding:14px 24px;display:flex;gap:32px;justify-content:center;flex-wrap:wrap}
.trust-item{color:var(--silver);font-size:.88rem;display:flex;align-items:center;gap:8px}
.trust-item svg{flex-shrink:0}

/* ---------- SECTION ---------- */
section{padding:64px 24px}
.section-inner{max-width:1200px;margin:0 auto}
.section-title{font-size:1.9rem;color:var(--blue-dark);font-weight:800;text-align:center;margin-bottom:8px}
.section-sub{text-align:center;color:#666;margin-bottom:44px;font-size:1rem}
.section-alt{background:var(--gray-bg)}

/* ---------- PRODUCT GRID ---------- */
.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.product-card{background:#fff;border:1px solid var(--border);border-radius:8px;overflow:hidden;transition:box-shadow .2s,transform .2s;display:flex;flex-direction:column}
.product-card:hover{box-shadow:0 8px 28px rgba(13,42,110,.14);transform:translateY(-3px)}
.product-card img{width:100%;height:200px;object-fit:cover;background:var(--gray-bg)}
.product-card-body{padding:16px 18px;flex:1;display:flex;flex-direction:column}
.product-card h3{font-size:1rem;color:var(--blue-dark);font-weight:700;margin-bottom:8px;line-height:1.4}
.product-card p{font-size:.875rem;color:#666;flex:1;margin-bottom:14px}
.product-card .price{color:var(--cta);font-weight:700;font-size:1.05rem;margin-bottom:12px}
.product-card a{background:var(--blue-mid);color:#fff;padding:9px 14px;border-radius:4px;text-align:center;font-size:.88rem;font-weight:600;transition:background .2s}
.product-card a:hover{background:var(--blue-dark);color:#fff}
.view-all{text-align:center;margin-top:36px}

/* ---------- ABOUT STRIP ---------- */
.about-strip{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.about-strip .text h2{font-size:1.75rem;color:var(--blue-dark);font-weight:800;margin-bottom:16px}
.about-strip .text p{margin-bottom:14px;color:#555}
.stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:24px 0}
.stat-box{background:var(--blue-dark);color:#fff;border-radius:8px;padding:20px 12px;text-align:center}
.stat-box .num{font-size:1.9rem;font-weight:800;color:var(--silver)}
.stat-box .label{font-size:.8rem;opacity:.8;margin-top:4px}
.about-strip .image img{border-radius:8px;width:100%}

/* ---------- WHY ---------- */
.why-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:24px}
.why-card{background:#fff;border-radius:8px;padding:28px 24px;border:1px solid var(--border);transition:box-shadow .2s}
.why-card:hover{box-shadow:0 6px 24px rgba(13,42,110,.1)}
.why-icon{width:48px;height:48px;background:var(--blue-dark);border-radius:50%;display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.why-icon svg{color:#fff}
.why-card h3{color:var(--blue-dark);font-size:1.05rem;font-weight:700;margin-bottom:8px}
.why-card p{font-size:.88rem;color:#666}

/* ---------- CATEGORIES ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:20px}
.cat-card{background:var(--blue-dark);border-radius:8px;padding:28px 20px;text-align:center;color:#fff;transition:background .2s,transform .2s;cursor:pointer}
.cat-card:hover{background:var(--blue-mid);transform:translateY(-2px)}
.cat-card .icon{font-size:2.2rem;margin-bottom:12px}
.cat-card h3{font-size:1rem;font-weight:700;margin-bottom:6px}
.cat-card p{font-size:.8rem;opacity:.75}

/* ---------- INSIGHTS ---------- */
.insights-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.insight-card{background:#fff;border:1px solid var(--border);border-radius:8px;overflow:hidden;transition:box-shadow .2s}
.insight-card:hover{box-shadow:0 6px 24px rgba(13,42,110,.12)}
.insight-card-body{padding:20px}
.insight-tag{display:inline-block;background:var(--blue-dark);color:#fff;font-size:.75rem;padding:3px 10px;border-radius:20px;margin-bottom:10px}
.insight-card h3{font-size:1rem;color:var(--blue-dark);font-weight:700;margin-bottom:8px;line-height:1.45}
.insight-card p{font-size:.875rem;color:#666;margin-bottom:14px}
.insight-card .read-more{font-size:.85rem;color:var(--blue-mid);font-weight:600}

/* ---------- CTA BANNER ---------- */
.cta-banner{background:linear-gradient(135deg,var(--blue-dark),var(--blue-mid));color:#fff;text-align:center;padding:64px 24px}
.cta-banner h2{font-size:2rem;font-weight:800;margin-bottom:12px}
.cta-banner p{font-size:1.05rem;opacity:.9;margin-bottom:32px;max-width:560px;margin-left:auto;margin-right:auto}
.cta-banner .btn-primary{font-size:1.1rem;padding:16px 38px}

/* ---------- CONTACT ROW ---------- */
.contact-row{display:flex;gap:24px;justify-content:center;flex-wrap:wrap;margin-top:24px}
.contact-pill{display:flex;align-items:center;gap:10px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);padding:12px 22px;border-radius:40px;color:#fff;font-size:.95rem;transition:background .2s}
.contact-pill:hover{background:rgba(255,255,255,.22);color:#fff}

/* ---------- FOOTER ---------- */
footer{background:#0a1f52;color:var(--silver);padding:48px 24px 24px}
.footer-inner{max-width:1200px;margin:0 auto}
.footer-top{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-brand p{font-size:.88rem;margin-top:12px;opacity:.8;max-width:280px;line-height:1.7}
.footer-col h4{color:#fff;font-size:.95rem;font-weight:700;margin-bottom:14px}
.footer-col ul{list-style:none}
.footer-col ul li{margin-bottom:8px}
.footer-col ul li a{color:var(--silver);font-size:.875rem;opacity:.8;transition:opacity .2s}
.footer-col ul li a:hover{opacity:1;color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:20px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}
.footer-bottom p{font-size:.8rem;opacity:.6}
.footer-bottom a{color:var(--silver);font-size:.8rem;opacity:.7}
.footer-bottom a:hover{opacity:1}

/* ---------- PAGE HERO (inner pages) ---------- */
.page-hero{background:linear-gradient(135deg,var(--blue-dark),var(--blue-mid));color:#fff;padding:52px 24px;text-align:center}
.page-hero h1{font-size:2rem;font-weight:800;margin-bottom:10px}
.page-hero p{opacity:.9;max-width:580px;margin:0 auto}
.breadcrumb{max-width:1200px;margin:0 auto 32px;font-size:.85rem;color:#888}
.breadcrumb a{color:var(--blue-mid)}

/* ---------- PRODUCT DETAIL ---------- */
.product-detail{display:grid;grid-template-columns:1fr 1fr;gap:48px;max-width:1200px;margin:0 auto;padding:48px 24px}
.product-info h1{font-size:1.75rem;color:var(--blue-dark);font-weight:800;margin-bottom:12px}
.spec-table{width:100%;border-collapse:collapse;margin:20px 0}
.spec-table tr:nth-child(even){background:var(--gray-bg)}
.spec-table td{padding:10px 14px;font-size:.9rem;border:1px solid var(--border)}
.spec-table td:first-child{font-weight:600;color:var(--blue-dark);width:40%}

/* ---------- ABOUT PAGE ---------- */
.about-section{max-width:1200px;margin:0 auto;padding:0 24px}
.timeline{position:relative;padding-left:32px}
.timeline::before{content:'';position:absolute;left:10px;top:0;bottom:0;width:2px;background:var(--border)}
.timeline-item{position:relative;margin-bottom:28px}
.timeline-item::before{content:'';position:absolute;left:-28px;top:6px;width:12px;height:12px;background:var(--blue-mid);border-radius:50%}
.timeline-item h4{font-weight:700;color:var(--blue-dark);margin-bottom:4px}
.timeline-item p{font-size:.9rem;color:#666}

/* ---------- FAQ ---------- */
.faq-list{max-width:820px;margin:0 auto}
.faq-item{border:1px solid var(--border);border-radius:8px;margin-bottom:12px;overflow:hidden}
.faq-q{padding:16px 20px;font-weight:700;color:var(--blue-dark);cursor:pointer;display:flex;justify-content:space-between;align-items:center}
.faq-q::after{content:'+';font-size:1.3rem;color:var(--blue-mid);transition:transform .2s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{padding:0 20px;max-height:0;overflow:hidden;transition:max-height .3s,padding .3s;font-size:.9rem;color:#555}
.faq-item.open .faq-a{max-height:400px;padding:0 20px 16px}

/* ---------- ARTICLE ---------- */
.article-body{max-width:820px;margin:0 auto;padding:0 24px}
.article-body h2{font-size:1.4rem;color:var(--blue-dark);font-weight:800;margin:28px 0 12px}
.article-body h3{font-size:1.15rem;color:var(--blue-dark);font-weight:700;margin:22px 0 10px}
.article-body p{margin-bottom:14px;line-height:1.75}
.article-body ul,
.article-body ol{margin:0 0 14px 20px;line-height:1.8}
.article-meta{font-size:.85rem;color:#888;margin-bottom:28px;display:flex;gap:16px;flex-wrap:wrap}

/* ---------- RESPONSIVE ---------- */
@media(max-width:900px){
  .about-strip{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr 1fr}
  .product-detail{grid-template-columns:1fr}
  .stats-row{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:640px){
  nav{gap:14px}
  nav a{font-size:.82rem}
  .hero h1{font-size:1.8rem}
  .section-title{font-size:1.5rem}
  .footer-top{grid-template-columns:1fr}
  .hero-btns{flex-direction:column;align-items:center}
  .stats-row{grid-template-columns:repeat(2,1fr)}
  .trust-bar{gap:16px}
}