/* 眼镜光学 - #455A64石墨灰+#42A5F5镜片蓝 | 精密专业 */
:root{--color-primary:#455A64;--color-primary-dark:#37474F;--color-accent:#42A5F5;--color-accent-dark:#1E88E5;--color-accent-light:#E3F2FD;--color-bg:#FAFAFA;--color-white:#fff;--color-text:#37474F;--color-text-light:#78909C;--color-text-lighter:#B0BEC5;--color-border:#CFD8DC;--color-border-light:#ECEFF1;--color-warm:#F9A825;--font-sans:-apple-system,BlinkMacSystemFont,'PingFang SC','Microsoft YaHei',sans-serif;--radius-sm:4px;--radius-md:8px;--radius-pill:999px;--shadow-sm:0 2px 8px rgba(69,90,100,.06);--shadow-md:0 4px 16px rgba(69,90,100,.1);--transition:all .25s ease}

/* 全局 */
body{font-family:var(--font-sans);color:var(--color-text);background:var(--color-bg);line-height:1.75;-webkit-font-smoothing:antialiased}a{color:var(--color-accent-dark);text-decoration:none;transition:var(--transition)}a:hover{color:var(--color-accent)}h1,h2,h3{font-weight:500;line-height:1.35}.container{max-width:1200px;margin:0 auto;padding:0 20px}.row{display:flex;gap:30px}.col-main{flex:1;min-width:0}.col-side{flex:0 0 300px;min-width:0}.skip-link{position:absolute;top:-100px;left:20px;background:var(--color-accent);color:#fff;padding:8px 18px;z-index:9999;border-radius:var(--radius-pill)}.skip-link:focus{top:12px}
.site-header{background:var(--color-white);border-bottom:2px solid var(--color-accent);position:sticky;top:0;z-index:100;box-shadow:0 1px 4px rgba(0,0,0,.04)}.header-main{display:flex;align-items:center;justify-content:space-between;padding:14px 0}.site-logo{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:600;color:var(--color-primary-dark);text-decoration:none}.logo-icon{font-size:26px;color:var(--color-accent)}.site-nav{display:flex;gap:2px}.site-nav a{padding:8px 18px;color:var(--color-text);font-size:14px;font-weight:500;border-radius:var(--radius-pill);transition:var(--transition)}.site-nav a:hover,.site-nav a.active{background:var(--color-accent);color:#fff}.mobile-toggle{display:none;background:none;border:none;cursor:pointer;padding:4px}.mobile-toggle span{display:block;width:24px;height:2px;margin:5px 0;background:var(--color-primary-dark)}

/* Hero */
.optic-hero{background:linear-gradient(135deg,#ECEFF1 0%,#E3F2FD 40%,#BBDEFB 100%);padding:70px 0;overflow:hidden}.hero-row{display:flex;align-items:center;gap:60px}.hero-text{flex:1}.hero-badge{display:inline-block;font-size:11px;font-weight:700;letter-spacing:.15em;color:var(--color-accent);margin-bottom:16px;background:var(--color-accent-light);padding:4px 14px;border-radius:var(--radius-pill)}.hero-title{font-size:44px;font-weight:300;color:var(--color-primary-dark);margin-bottom:16px;line-height:1.2}.hero-title em{font-style:normal;font-weight:700;color:var(--color-accent)}.hero-subtitle{font-size:16px;color:var(--color-text-light);margin-bottom:32px;max-width:420px}.hero-actions{display:flex;gap:14px}.hero-visual{flex:0 0 280px;position:relative;height:240px}.hero-circle{position:absolute;width:200px;height:200px;border-radius:50%;border:3px solid var(--color-accent);top:20px;left:40px;opacity:.15}.hero-lens{position:absolute;width:160px;height:160px;border-radius:50%;background:radial-gradient(circle at 35% 35%,rgba(66,165,245,.15),rgba(66,165,245,.03));top:40px;left:60px}

/* 按钮 */
.btn-optic-primary{display:inline-flex;align-items:center;gap:8px;padding:13px 32px;background:var(--color-accent);color:#fff;font-weight:600;border-radius:var(--radius-pill);border:none;transition:var(--transition);font-size:15px;cursor:pointer;text-decoration:none}.btn-optic-primary:hover{background:var(--color-accent-dark);color:#fff;transform:translateY(-1px);box-shadow:0 4px 12px rgba(66,165,245,.35)}.btn-optic-outline{display:inline-flex;align-items:center;gap:8px;padding:13px 32px;background:transparent;color:var(--color-accent);font-weight:600;border-radius:var(--radius-pill);border:2px solid var(--color-accent);transition:var(--transition);font-size:15px;cursor:pointer;text-decoration:none}.btn-optic-outline:hover{background:var(--color-accent);color:#fff}.btn-lg{padding:16px 40px;font-size:17px}

/* Section */
.section{padding:72px 0}.section.bg-light{background:var(--color-accent-light)}.section-header{text-align:center;margin-bottom:48px}.section-label{display:inline-block;font-size:11px;font-weight:700;letter-spacing:.12em;color:var(--color-accent);margin-bottom:8px;text-transform:uppercase}.section-title{font-size:30px;font-weight:300;color:var(--color-primary-dark);letter-spacing:1px}.section-title::after{content:'';display:block;width:36px;height:2px;background:var(--color-accent);margin:14px auto 0;border-radius:1px}

/* 数据条 */
.stats-bar{background:var(--color-primary-dark);padding:40px 0}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}.stat-item{color:#fff}.stat-num{display:block;font-size:40px;font-weight:300;color:var(--color-accent);line-height:1.1;letter-spacing:1px}.stat-label{display:block;font-size:12px;color:rgba(255,255,255,.45);margin-top:4px;letter-spacing:.06em;text-transform:uppercase}

/* 镜框展示（左右交错） */
.frames-showcase{display:flex;flex-direction:column;gap:32px}.frame-item{display:flex;align-items:center;gap:48px;padding:32px;background:var(--color-white);border-radius:var(--radius-md);box-shadow:var(--shadow-sm)}.frame-item.alt{flex-direction:row-reverse}.frame-img{flex:0 0 180px;height:160px;background:var(--color-accent-light);border-radius:var(--radius-md);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px}.frame-img i{font-size:56px;color:var(--color-accent);opacity:.5}.frame-weight{font-size:12px;font-weight:600;color:var(--color-accent)}.frame-info{flex:1;min-width:0}.frame-info h3{font-size:22px;font-weight:300;margin-bottom:10px;letter-spacing:1px}.frame-info p{font-size:14px;color:var(--color-text-light);line-height:1.7;margin-bottom:12px}.svc-features{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:0}.svc-features li{font-size:12px;color:var(--color-accent-dark);background:var(--color-accent-light);padding:4px 12px;border-radius:var(--radius-pill);font-weight:500}

/* 镜片展示 */
.lens-showcase{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.lens-item{background:var(--color-white);padding:36px 28px;text-align:center;border-radius:var(--radius-md);box-shadow:var(--shadow-sm);border:2px solid transparent;transition:var(--transition)}.lens-item:hover{border-color:var(--color-accent);transform:translateY(-3px)}.lens-item.featured{border-color:var(--color-accent);box-shadow:var(--shadow-md)}.lens-icon{margin:0 auto 14px;width:60px;height:60px;border-radius:50%;background:var(--color-accent-light);display:flex;align-items:center;justify-content:center}.lens-flag{font-size:13px;font-weight:700;letter-spacing:.06em;color:var(--color-accent)}.lens-item h3{font-size:20px;font-weight:300;margin-bottom:8px;letter-spacing:.5px}.lens-desc{font-size:13px;color:var(--color-text-light);margin-bottom:14px;line-height:1.6}.lens-features{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;margin-bottom:16px}.lens-features span{font-size:11px;background:var(--color-accent-light);color:var(--color-accent-dark);padding:3px 10px;border-radius:var(--radius-pill);font-weight:500}.lens-price{font-size:22px;font-weight:300;color:var(--color-accent);letter-spacing:.5px}

/* 验光流程（纵向） */
.flow-steps-v{display:flex;flex-direction:column;gap:16px;max-width:700px;margin:0 auto}.flow-step-v{display:flex;gap:20px;align-items:flex-start}.flow-step-num{flex-shrink:0;width:48px;height:48px;border-radius:50%;background:var(--color-accent);color:#fff;font-size:20px;font-weight:300;display:flex;align-items:center;justify-content:center}.flow-step-body h3{font-size:17px;font-weight:500;margin-bottom:4px}.flow-step-body p{font-size:13px;color:var(--color-text-light);margin:0;line-height:1.6}

/* 文章列表 */
.content-block{background:var(--color-white);padding:28px;border-radius:var(--radius-md);box-shadow:var(--shadow-sm)}.block-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;padding-bottom:12px;border-bottom:2px solid var(--color-border-light)}.block-title{font-size:20px;font-weight:300;letter-spacing:1px;margin:0;padding-left:12px;border-left:3px solid var(--color-accent)}.block-more{font-size:13px;color:var(--color-text-light);font-weight:500;white-space:nowrap}.block-more:hover{color:var(--color-accent)}.article-list-v{display:flex;flex-direction:column;gap:20px}.article-item-v{display:flex;gap:18px;padding-bottom:18px;border-bottom:1px solid var(--color-border-light)}.article-item-v:last-child{border-bottom:none}.article-thumb{flex-shrink:0;width:140px;height:100px;overflow:hidden;border-radius:var(--radius-sm)}.article-thumb img{width:100%;height:100%;object-fit:cover;transition:var(--transition)}.article-item-v:hover .article-thumb img{transform:scale(1.03)}.article-info{flex:1;min-width:0}.article-date{font-size:11px;color:var(--color-text-lighter);margin-bottom:6px;display:block}.article-info h3{font-size:15px;font-weight:500;margin-bottom:6px;line-height:1.4}.article-info h3 a{color:var(--color-text)}.article-info h3 a:hover{color:var(--color-accent)}.article-info p{font-size:13px;color:var(--color-text-light);line-height:1.6;margin:0}

/* 侧边栏 */
.sidebar .widget{background:var(--color-white);border:1px solid var(--color-border-light);margin-bottom:18px;padding:20px;border-radius:var(--radius-md)}.widget-title{font-size:15px;font-weight:500;padding-bottom:10px;margin-bottom:14px;border-bottom:2px solid var(--color-accent);display:flex;align-items:center;gap:6px;letter-spacing:.5px}.widget-title i{color:var(--color-accent)}.frame-grid{display:flex;flex-wrap:wrap;gap:6px}.frame-tag{padding:5px 14px;background:var(--color-accent-light);font-size:12px;font-weight:500;color:var(--color-accent-dark);border-radius:var(--radius-pill)}.optic-list{list-style:none;padding:0;margin:0}.optic-list li{padding:8px 0;font-size:13px;border-bottom:1px solid var(--color-border-light)}.optic-list li:last-child{border-bottom:none}.optic-list li a{display:flex;align-items:center;gap:6px;color:var(--color-text)}.optic-list li a:hover{color:var(--color-accent)}.optic-list li a i{color:var(--color-text-lighter);font-size:10px}.widget-ad a{display:block;position:relative;overflow:hidden;border-radius:var(--radius-sm)}.widget-ad img{width:100%;display:block;transition:var(--transition)}.widget-ad a:hover img{transform:scale(1.03)}.ad-label{position:absolute;bottom:10px;left:10px;background:var(--color-accent);color:#fff;font-size:11px;font-weight:600;padding:4px 12px;border-radius:var(--radius-pill)}

/* 客户评价 */
.review-grid-v{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.review-card-v{background:var(--color-white);padding:28px;border-radius:var(--radius-md);box-shadow:var(--shadow-sm);border-top:3px solid var(--color-accent);transition:var(--transition)}.review-card-v:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}.review-stars{color:var(--color-warm);font-size:14px;letter-spacing:2px;margin-bottom:12px}.review-text{font-size:14px;line-height:1.8;color:var(--color-text);margin-bottom:16px}.review-author-row{display:flex;align-items:center;gap:10px;font-size:12px;padding-top:12px;border-top:1px solid var(--color-border-light)}.review-author{font-weight:600;color:var(--color-accent-dark)}.review-tag{color:var(--color-text-lighter)}

/* FAQ卡片 */
.faq-grid-v{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}.faq-card{background:var(--color-white);padding:28px;border-radius:var(--radius-md);box-shadow:var(--shadow-sm);border-left:4px solid var(--color-accent);transition:var(--transition)}.faq-card:hover{border-left-color:var(--color-accent-dark);box-shadow:var(--shadow-md)}.faq-card h3{font-size:16px;font-weight:500;margin-bottom:10px;color:var(--color-primary-dark)}.faq-card p{font-size:13px;color:var(--color-text-light);line-height:1.7;margin:0}

/* CTA */
.optic-cta{background:linear-gradient(135deg,var(--color-primary-dark),var(--color-primary));padding:64px 0;text-align:center;color:#fff}.optic-cta h2{color:#fff;font-size:28px;font-weight:300;letter-spacing:2px;margin-bottom:12px}.optic-cta p{color:rgba(255,255,255,.55);margin:10px 0 30px;font-size:15px}.cta-buttons{display:flex;justify-content:center;gap:14px;flex-wrap:wrap}.optic-cta .btn-optic-primary{background:#fff;color:var(--color-primary-dark);font-size:16px;padding:15px 42px}.optic-cta .btn-optic-primary:hover{background:var(--color-accent-light);color:var(--color-primary-dark)}.optic-cta .btn-optic-outline{border-color:rgba(255,255,255,.35);color:rgba(255,255,255,.85)}.optic-cta .btn-optic-outline:hover{background:rgba(255,255,255,.1);border-color:#fff;color:#fff}

/* 热线 */
.contact-bar{background:var(--color-accent);padding:36px 0}.contact-bar-row{display:flex;align-items:center;justify-content:center;gap:56px;flex-wrap:wrap}.contact-bar h2{color:#fff;font-size:20px;font-weight:300;letter-spacing:2px;margin:0 0 4px}.contact-bar p{color:rgba(255,255,255,.6);font-size:13px;margin:0}.contact-tel{display:flex;align-items:center;gap:12px;color:#fff}.contact-tel i{font-size:34px}.contact-tel span{font-size:26px;font-weight:300;letter-spacing:1px}

/* Footer */
.site-footer{background:var(--color-primary-dark);color:rgba(255,255,255,.45);padding:48px 0 0}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;padding-bottom:36px}.footer-title{color:var(--color-accent);font-size:15px;font-weight:500;margin-bottom:14px;letter-spacing:.5px}.footer-desc{font-size:13px;line-height:1.7}.footer-col a{display:block;color:rgba(255,255,255,.35);font-size:13px;padding:4px 0;transition:var(--transition)}.footer-col a:hover{color:var(--color-accent)}.qr-placeholder{width:100px;height:100px;background:rgba(255,255,255,.06);display:flex;align-items:center;justify-content:center;border-radius:var(--radius-sm)}.qr-placeholder i{font-size:36px;color:rgba(255,255,255,.1)}.footer-bottom{display:flex;justify-content:center;gap:16px;padding:16px 0;border-top:1px solid rgba(255,255,255,.06);font-size:13px}

/* 返回顶部 */
#floatbtn{position:fixed;bottom:30px;right:24px;z-index:99}#back-to-top{display:flex;align-items:center;justify-content:center;width:44px;height:44px;background:var(--color-accent);color:#fff;border-radius:50%;box-shadow:0 4px 12px rgba(66,165,245,.25);opacity:0;visibility:hidden;transition:var(--transition);font-size:18px}#back-to-top.show{opacity:1;visibility:visible}#back-to-top:hover{background:var(--color-accent-dark);transform:translateY(-2px)}

/* 响应式 */
@media(max-width:992px){
  .hero-row{flex-direction:column;text-align:center;gap:30px}.hero-subtitle{max-width:none}.hero-actions{justify-content:center}.hero-visual{display:none}
  .col-side{flex:0 0 100%}.row{flex-direction:column}
  .frames-showcase .frame-item,.frames-showcase .frame-item.alt{flex-direction:column;text-align:center;gap:20px}.frame-img{flex:0 0 120px;width:100%}
  .lens-showcase,.review-grid-v,.faq-grid-v{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .hero-title{font-size:34px}
}
@media(max-width:768px){
  .hero-title{font-size:28px}.section-title{font-size:24px}.section{padding:48px 0}
  .lens-showcase,.review-grid-v,.faq-grid-v,.frame-item{grid-template-columns:1fr}.frame-item{flex-direction:column!important}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:16px}.stat-num{font-size:32px}
  .site-nav{display:none;position:absolute;top:100%;left:0;right:0;background:var(--color-white);flex-direction:column;padding:8px;box-shadow:0 4px 12px rgba(0,0,0,.1)}.site-nav.open{display:flex}.site-nav a{padding:12px 18px}.mobile-toggle{display:block}
  .footer-grid{grid-template-columns:1fr}
  .contact-bar-row{flex-direction:column;gap:16px;text-align:center}
}
/* === 家居凳椅库 补充 === */
.site-logo-text{display:inline-block;font-size:20px;font-weight:600;color:var(--color-primary-dark);letter-spacing:.5px;line-height:1.3}
.site-footer .site-logo-text{color:#fff;font-size:18px;display:block;margin-bottom:10px;font-weight:500}
.site-nav .dropdown{position:relative;display:flex;align-items:center}
.site-nav .dropdown-menu{display:none;position:absolute;top:100%;left:0;z-index:1000;min-width:180px;background:#fff;border:1px solid var(--color-border-light);border-radius:var(--radius-md);box-shadow:var(--shadow-md);padding:6px 0}
.site-nav .dropdown:hover .dropdown-menu{display:block}
.site-nav .dropdown-menu a{display:block;padding:9px 18px;font-size:13px;color:var(--color-text);white-space:nowrap;border-radius:0}
.site-nav .dropdown-menu a:hover{background:var(--color-accent-light);color:var(--color-accent-dark)}
.footer-main{display:flex;flex-wrap:wrap;align-items:flex-start;justify-content:space-between;gap:30px;padding-bottom:36px}
.footer-main>div{flex:1 1 180px;min-width:170px}
.footer-main .footer-brand{flex:1.5 1 240px}
.footer-main b{display:block;color:var(--color-accent);font-size:14px;font-weight:500;margin-bottom:12px;letter-spacing:.5px}
.footer-main a{display:block;color:rgba(255,255,255,.35);font-size:13px;padding:4px 0;transition:var(--transition)}
.footer-main a:hover{color:var(--color-accent)}
.footer-main p{font-size:13px;line-height:1.7;margin:8px 0 0;color:rgba(255,255,255,.35)}
/* 首页卡片区块 */
.block{margin-bottom:44px}
.block-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;padding-bottom:12px;border-bottom:2px solid var(--color-border-light)}
.block-header h3{font-size:20px;font-weight:300;letter-spacing:1px;margin:0;padding-left:12px;border-left:3px solid var(--color-accent)}
.block-header .more{font-size:13px;color:var(--color-text-light);font-weight:500;white-space:nowrap}
.block-header .more:hover{color:var(--color-accent)}
.card-grid{display:grid;gap:20px}.card-grid-4{grid-template-columns:repeat(4,1fr)}
.card{display:block;background:#fff;border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-sm);transition:var(--transition)}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.card-cover{position:relative;padding-top:75%;overflow:hidden;background:var(--color-accent-light)}
.card-cover img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:var(--transition)}
.card:hover .card-cover img{transform:scale(1.04)}
.card-body{padding:14px 16px}
.card-title{font-size:14px;font-weight:500;margin:0 0 6px;line-height:1.4;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.card-meta{font-size:12px;color:var(--color-text-light)}
.article-list{list-style:none;padding:0;margin:0}
.article-row{border-bottom:1px solid var(--color-border-light)}
.article-row:last-child{border-bottom:none}
.article-row a{display:flex;gap:16px;padding:14px 0;align-items:center;color:inherit}
.article-row a:hover{color:inherit}
.article-row img{width:120px;height:80px;object-fit:cover;flex-shrink:0;border-radius:var(--radius-sm)}
.article-row div{flex:1;min-width:0}
.article-row h4{font-size:14px;font-weight:500;margin:0 0 4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-row span{font-size:12px;color:var(--color-text-light)}
/* 返回顶部修复 */
#back-to-top{line-height:1;padding:0;border:none}
#back-to-top.show{display:flex!important;opacity:1;visibility:visible}
#back-to-top i{display:flex;align-items:center;justify-content:center;width:100%;height:100%;line-height:1}
@media(max-width:991px){.card-grid-4{grid-template-columns:repeat(2,1fr)}.footer-main{flex-direction:column;gap:20px}}
@media(max-width:767px){.card-grid-4{grid-template-columns:1fr}}
/* 分类页/详情页 */
.page-banner{background:linear-gradient(135deg,var(--color-primary-dark),var(--color-primary));padding:48px 0;text-align:center;color:#fff}.page-banner-title{font-size:28px;font-weight:300;letter-spacing:2px;color:#fff;margin:0 0 8px}.breadcrumb-inline{font-size:13px;color:rgba(255,255,255,.5)}.breadcrumb-inline a{color:rgba(255,255,255,.6)}.breadcrumb-inline a:hover{color:#fff}.page-container{padding:40px 20px 60px}
.pagination-box{text-align:center;margin-top:30px}.pagination{display:inline-flex;list-style:none;padding:0;margin:0;gap:4px}.pagination li a,.pagination li span{display:inline-block;min-width:36px;height:36px;line-height:34px;padding:0 10px;border:1px solid var(--color-border-light);background:#fff;text-align:center;border-radius:var(--radius-sm);font-size:13px;color:var(--color-text)}.pagination li a:hover{border-color:var(--color-accent);color:var(--color-accent)}.pagination .active span{background:var(--color-accent);color:#fff;border-color:var(--color-accent)}
.article-detail{background:#fff;border-radius:var(--radius-md);padding:32px;box-shadow:var(--shadow-sm)}.article-detail-title{font-size:28px;font-weight:300;letter-spacing:1px;margin:0 0 16px}.article-detail-content{font-size:16px;line-height:1.9;color:var(--color-text)}.article-detail-content img{max-width:100%;border-radius:var(--radius-sm);margin:16px 0}.article-detail-content p{margin:0 0 16px}.article-detail-nav{display:flex;gap:14px;margin-top:28px;padding-top:16px;border-top:1px solid var(--color-border-light)}.detail-nav-item{flex:1;min-width:0;padding:14px 18px;background:var(--color-bg);border-radius:var(--radius-sm);color:var(--color-text);font-size:14px;border:1px solid var(--color-border-light)}.detail-nav-item:hover{color:var(--color-accent);border-color:var(--color-accent)}.article-summary{margin:28px 0;padding:20px 22px;background:var(--color-accent-light);border-radius:var(--radius-md);border-left:3px solid var(--color-accent)}.article-summary-title{font-size:14px;font-weight:500;margin:0 0 8px;color:var(--color-primary-dark)}.article-summary p{font-size:14px;color:var(--color-text-light);margin:0;line-height:1.8}