/* ========== 广东现代涂料 xian-dai.cn 水性家具漆/木器漆官网 ========== */
/* 配色：温暖木色调 + 环保绿，体现自然、环保、木质质感 */
:root{
  --wood-dark:#5D4037;
  --wood-mid:#8D6E63;
  --wood-light:#BCAAA4;
  --green:#2E7D32;
  --green-light:#4CAF50;
  --green-bg:#E8F5E9;
  --cream:#FAF7F2;
  --cream-dark:#F0EBE3;
  --text:#3E2723;
  --text-light:#6D4C41;
  --text-muted:#8D6E63;
  --white:#FFFFFF;
  --border:#E0D5CC;
  --shadow:0 4px 20px rgba(93,64,55,0.08);
  --shadow-hover:0 8px 30px rgba(93,64,55,0.15);
  --radius:10px;
  --radius-lg:16px;
  --max-width:1200px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
  color:var(--text);
  background:var(--cream);
  line-height:1.7;
  font-size:16px;
}
a{color:var(--green);text-decoration:none;transition:color .3s}
a:hover{color:var(--wood-dark)}
img{max-width:100%;height:auto;display:block}
.container{max-width:var(--max-width);margin:0 auto;padding:0 20px}

/* ========== Header ========== */
.header{
  position:sticky;top:0;z-index:1000;
  background:rgba(255,255,255,0.97);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
  transition:box-shadow .3s;
}
.header.scrolled{box-shadow:var(--shadow)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:12px;text-decoration:none}
.logo-mark{
  width:44px;height:44px;border-radius:10px;
  background:linear-gradient(135deg,var(--wood-dark),var(--wood-mid));
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-size:22px;font-weight:700;flex-shrink:0;
}
.logo-text{display:flex;flex-direction:column;line-height:1.2}
.logo-text .cn{font-size:18px;font-weight:700;color:var(--wood-dark)}
.logo-text .en{font-size:10px;color:var(--text-muted);letter-spacing:1px}
.nav{display:flex;gap:4px}
.nav a{
  padding:8px 14px;border-radius:6px;
  color:var(--text-light);font-size:15px;font-weight:500;
  transition:all .3s;position:relative;
}
.nav a:hover,.nav a.active{color:var(--green);background:var(--green-bg)}
.header-phone{
  display:flex;align-items:center;gap:8px;
  color:var(--wood-dark);font-weight:700;font-size:16px;
  padding:8px 16px;border-radius:8px;
  background:var(--green-bg);
}
.header-phone svg{width:18px;height:18px;color:var(--green)}
.mobile-menu-btn{
  display:none;flex-direction:column;gap:5px;
  background:none;border:none;cursor:pointer;padding:8px;
}
.mobile-menu-btn span{width:24px;height:2px;background:var(--wood-dark);border-radius:2px;transition:all .3s}

/* ========== Hero ========== */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(135deg,#3E2723 0%,#5D4037 50%,#4E342E 100%);
  color:#fff;padding:80px 0 100px;
}
.hero::before{
  content:'';position:absolute;top:0;right:0;width:50%;height:100%;
  background:url('../images/furniture-showroom.jpg') center/cover no-repeat;
  opacity:0.25;
}
.hero::after{
  content:'';position:absolute;top:0;right:0;width:50%;height:100%;
  background:linear-gradient(90deg,rgba(62,39,35,0.9) 0%,rgba(62,39,35,0.3) 100%);
}
.hero .container{position:relative;z-index:2}
.hero-eyebrow{
  display:inline-block;padding:6px 16px;border-radius:20px;
  background:rgba(76,175,80,0.2);color:var(--green-light);
  font-size:14px;font-weight:600;margin-bottom:20px;
  border:1px solid rgba(76,175,80,0.3);
}
.hero h1{font-size:42px;font-weight:800;line-height:1.3;margin-bottom:20px;max-width:650px}
.hero h1 .highlight{color:var(--green-light)}
.hero p{font-size:18px;color:rgba(255,255,255,0.85);max-width:600px;margin-bottom:32px;line-height:1.8}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:36px}
.hero-tag{
  padding:6px 14px;border-radius:20px;
  background:rgba(255,255,255,0.1);color:rgba(255,255,255,0.9);
  font-size:14px;border:1px solid rgba(255,255,255,0.15);
}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 32px;border-radius:8px;font-size:16px;font-weight:600;
  cursor:pointer;border:none;transition:all .3s;text-decoration:none;
}
.btn-primary{background:var(--green);color:#fff}
.btn-primary:hover{background:var(--green-light);color:#fff;transform:translateY(-2px);box-shadow:0 6px 20px rgba(46,125,50,0.4)}
.btn-outline{background:transparent;color:#fff;border:2px solid rgba(255,255,255,0.4)}
.btn-outline:hover{border-color:#fff;background:rgba(255,255,255,0.1);color:#fff}
.btn-wood{background:var(--wood-dark);color:#fff}
.btn-wood:hover{background:var(--wood-mid);color:#fff}

/* ========== Page Header (内页) ========== */
.page-header{
  background:linear-gradient(135deg,#3E2723,#5D4037);
  color:#fff;padding:60px 0 50px;position:relative;overflow:hidden;
}
.page-header::after{
  content:'';position:absolute;bottom:0;right:0;width:40%;height:100%;
  background:url('../images/wood-door-panel.jpg') center/cover no-repeat;
  opacity:0.15;
}
.page-header .container{position:relative;z-index:2}
.breadcrumb{font-size:14px;color:rgba(255,255,255,0.7);margin-bottom:16px}
.breadcrumb a{color:rgba(255,255,255,0.7)}
.breadcrumb a:hover{color:var(--green-light)}
.breadcrumb .sep{margin:0 8px}
.page-header h1{font-size:36px;font-weight:800;margin-bottom:12px}
.page-header p{font-size:16px;color:rgba(255,255,255,0.8);max-width:700px}

/* ========== Section ========== */
.section{padding:70px 0}
.section-alt{background:var(--cream-dark)}
.section-title{text-align:center;margin-bottom:50px}
.section-title .eyebrow{
  display:inline-block;font-size:13px;font-weight:700;
  color:var(--green);letter-spacing:2px;text-transform:uppercase;
  margin-bottom:10px;
}
.section-title h2{font-size:32px;font-weight:800;color:var(--wood-dark);margin-bottom:12px}
.section-title p{font-size:16px;color:var(--text-muted);max-width:600px;margin:0 auto}

/* ========== Product Cards ========== */
.products-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:24px}
.product-card{
  background:#fff;border-radius:var(--radius-lg);overflow:hidden;
  box-shadow:var(--shadow);transition:all .3s;border:1px solid var(--border);
}
.product-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.product-card-img{height:200px;overflow:hidden;position:relative}
.product-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.product-card:hover .product-card-img img{transform:scale(1.08)}
.product-card-badge{
  position:absolute;top:12px;left:12px;
  padding:4px 12px;border-radius:20px;
  background:var(--green);color:#fff;font-size:12px;font-weight:600;
}
.product-card-body{padding:24px}
.product-card-body h3{font-size:20px;font-weight:700;color:var(--wood-dark);margin-bottom:10px}
.product-card-body p{font-size:14px;color:var(--text-muted);margin-bottom:16px;line-height:1.7}
.product-card-tags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:16px}
.product-card-tags span{
  padding:3px 10px;border-radius:4px;font-size:12px;
  background:var(--cream-dark);color:var(--text-light);
}
.product-card-link{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--green);font-weight:600;font-size:14px;
}
.product-card-link svg{width:14px;height:14px;transition:transform .3s}
.product-card-link:hover svg{transform:translateX(4px)}

/* ========== Advantages ========== */
.advantages-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:24px}
.advantage-item{
  background:#fff;padding:32px 28px;border-radius:var(--radius-lg);
  border:1px solid var(--border);transition:all .3s;
}
.advantage-item:hover{border-color:var(--green-light);box-shadow:var(--shadow)}
.advantage-icon{
  width:56px;height:56px;border-radius:14px;
  background:var(--green-bg);display:flex;align-items:center;justify-content:center;
  margin-bottom:20px;color:var(--green);
}
.advantage-icon svg{width:28px;height:28px}
.advantage-item h3{font-size:18px;font-weight:700;color:var(--wood-dark);margin-bottom:10px}
.advantage-item p{font-size:14px;color:var(--text-muted);line-height:1.7}

/* ========== Scenarios / Applications ========== */
.scenarios-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:20px}
.scenario-item{
  background:#fff;border-radius:var(--radius);padding:28px 20px;
  text-align:center;border:1px solid var(--border);transition:all .3s;
}
.scenario-item:hover{border-color:var(--green);transform:translateY(-4px);box-shadow:var(--shadow)}
.scenario-icon{
  width:52px;height:52px;border-radius:50%;
  background:var(--green-bg);display:flex;align-items:center;justify-content:center;
  margin:0 auto 14px;color:var(--green);
}
.scenario-icon svg{width:26px;height:26px}
.scenario-item h4{font-size:16px;font-weight:600;color:var(--wood-dark)}

/* ========== Cases ========== */
.cases-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:28px}
.case-card{
  background:#fff;border-radius:var(--radius-lg);overflow:hidden;
  box-shadow:var(--shadow);border:1px solid var(--border);transition:all .3s;
}
.case-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.case-card-img{height:220px;overflow:hidden;position:relative}
.case-card-img img{width:100%;height:100%;object-fit:cover}
.case-type{
  position:absolute;top:14px;left:14px;
  padding:5px 14px;border-radius:20px;
  background:rgba(46,125,50,0.9);color:#fff;font-size:13px;font-weight:600;
}
.case-card-body{padding:24px}
.case-card-body h3{font-size:19px;font-weight:700;color:var(--wood-dark);margin-bottom:10px}
.case-meta{display:flex;gap:12px;margin-bottom:12px}
.case-meta span{
  font-size:13px;color:var(--green);font-weight:600;
  padding:2px 10px;background:var(--green-bg);border-radius:4px;
}
.case-card-body p{font-size:14px;color:var(--text-muted);line-height:1.7}

/* ========== News / Knowledge Cards ========== */
.news-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:28px}
.news-card{
  background:#fff;border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid var(--border);transition:all .3s;display:flex;flex-direction:column;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--green-light)}
.news-card-img{
  height:180px;background:linear-gradient(135deg,var(--cream-dark),var(--green-bg));
  display:flex;align-items:center;justify-content:center;
}
.news-icon{width:64px;height:64px;color:var(--wood-mid);opacity:0.6}
.news-card-body{padding:24px;flex:1;display:flex;flex-direction:column}
.news-card-body .date{
  display:flex;align-items:center;gap:6px;
  font-size:13px;color:var(--green);font-weight:600;margin-bottom:10px;
}
.news-card-body h3{font-size:18px;font-weight:700;color:var(--wood-dark);margin-bottom:10px;line-height:1.5}
.news-card-body p{font-size:14px;color:var(--text-muted);line-height:1.7;margin-bottom:16px;flex:1}
.read-more{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--green);font-weight:600;font-size:14px;
}
.read-more svg{transition:transform .3s}
.read-more:hover svg{transform:translateX(4px)}

/* ========== CTA Band ========== */
.cta-band{
  background:linear-gradient(135deg,var(--wood-dark),var(--wood-mid));
  color:#fff;padding:50px 0;
}
.cta-band-inner{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:24px}
.cta-band-text h2{font-size:26px;font-weight:700;margin-bottom:8px}
.cta-band-text p{font-size:15px;color:rgba(255,255,255,0.8)}
.cta-band-phone .phone-num{font-size:28px;font-weight:800;color:var(--green-light)}

/* ========== Footer ========== */
.footer{background:#2C1810;color:rgba(255,255,255,0.7);padding:60px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:40px}
.footer-brand .logo-text .cn{color:#fff;font-size:17px}
.footer-brand .logo-text .en{color:rgba(255,255,255,0.5)}
.footer-brand p{font-size:14px;line-height:1.8;margin-top:16px;color:rgba(255,255,255,0.6)}
.footer-col h4{color:#fff;font-size:16px;font-weight:700;margin-bottom:18px}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:10px}
.footer-col a{color:rgba(255,255,255,0.6);font-size:14px;transition:color .3s}
.footer-col a:hover{color:var(--green-light)}
.footer-contact-item{display:flex;align-items:flex-start;gap:10px;margin-bottom:14px;font-size:14px}
.footer-contact-item svg{width:18px;height:18px;flex-shrink:0;color:var(--green-light);margin-top:3px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.1);
  padding:20px 0;font-size:13px;color:rgba(255,255,255,0.5);text-align:center;
}
.footer-bottom a{color:rgba(255,255,255,0.5)}
.footer-bottom a:hover{color:var(--green-light)}

/* ========== Floating Contact ========== */
.floating-contact{
  position:fixed;right:20px;bottom:100px;z-index:999;
  display:flex;flex-direction:column;gap:10px;
}
.fc-btn{
  width:52px;height:52px;border-radius:50%;
  background:#fff;box-shadow:var(--shadow-hover);
  display:flex;align-items:center;justify-content:center;
  cursor:pointer;position:relative;transition:all .3s;border:1px solid var(--border);
}
.fc-btn:hover{background:var(--green);transform:scale(1.1)}
.fc-btn:hover svg{stroke:#fff}
.fc-btn svg{width:24px;height:24px;stroke:var(--green)}
.fc-btn.phone{background:var(--green)}
.fc-btn.phone svg{stroke:#fff}
.fc-btn.phone:hover{background:var(--green-light)}
.fc-btn .tooltip{
  position:absolute;right:64px;top:50%;transform:translateY(-50%);
  background:var(--wood-dark);color:#fff;padding:6px 14px;border-radius:6px;
  font-size:14px;white-space:nowrap;opacity:0;pointer-events:none;transition:opacity .3s;
}
.fc-btn:hover .tooltip{opacity:1}
.fc-wechat-popup{
  position:absolute;right:64px;bottom:0;
  background:#fff;padding:12px;border-radius:10px;box-shadow:var(--shadow-hover);
  opacity:0;pointer-events:none;transition:opacity .3s;text-align:center;
}
.fc-btn.wechat:hover .fc-wechat-popup{opacity:1;pointer-events:auto}
.fc-wechat-popup img{width:140px;height:140px;object-fit:contain}
.fc-wechat-popup p{font-size:12px;color:var(--text-light);margin-top:6px}

/* ========== Back to Top ========== */
.back-top{
  position:fixed;right:20px;bottom:30px;z-index:999;
  width:48px;height:48px;border-radius:50%;
  background:var(--wood-dark);color:#fff;border:none;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  opacity:0;pointer-events:none;transition:all .3s;box-shadow:var(--shadow);
}
.back-top.show{opacity:1;pointer-events:auto}
.back-top:hover{background:var(--green)}
.back-top svg{width:22px;height:22px;stroke:#fff}

/* ========== About ========== */
.about-hero{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center}
.about-hero-img{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow)}
.about-hero-img img{width:100%;height:400px;object-fit:cover}
.about-text h2{font-size:28px;font-weight:800;color:var(--wood-dark);margin-bottom:20px}
.about-text p{font-size:15px;color:var(--text-light);line-height:1.9;margin-bottom:16px}
.highlight-box{
  background:var(--green-bg);border-left:4px solid var(--green);
  padding:16px 20px;border-radius:0 8px 8px 0;
  font-size:15px;color:var(--green);font-weight:600;margin-top:20px;
}

/* ========== Timeline ========== */
.timeline{position:relative;max-width:800px;margin:0 auto;padding-left:40px}
.timeline::before{
  content:'';position:absolute;left:12px;top:0;bottom:0;
  width:2px;background:var(--border);
}
.timeline-item{position:relative;margin-bottom:36px}
.timeline-item::before{
  content:'';position:absolute;left:-34px;top:6px;
  width:14px;height:14px;border-radius:50%;
  background:var(--green);border:3px solid #fff;box-shadow:0 0 0 2px var(--green);
}
.timeline-item .year{
  display:inline-block;padding:3px 12px;border-radius:4px;
  background:var(--green-bg);color:var(--green);font-size:13px;font-weight:700;margin-bottom:8px;
}
.timeline-item h4{font-size:18px;font-weight:700;color:var(--wood-dark);margin-bottom:6px}
.timeline-item p{font-size:14px;color:var(--text-muted)}

/* ========== Cert Grid ========== */
.cert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:24px}
.cert-item{
  background:#fff;padding:32px 24px;border-radius:var(--radius-lg);
  text-align:center;border:1px solid var(--border);transition:all .3s;
}
.cert-item:hover{border-color:var(--green);box-shadow:var(--shadow)}
.cert-icon{width:56px;height:56px;margin:0 auto 16px;color:var(--green)}
.cert-item h4{font-size:17px;font-weight:700;color:var(--wood-dark);margin-bottom:6px}
.cert-item p{font-size:13px;color:var(--text-muted)}

/* ========== Contact ========== */
.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:50px}
.contact-info h2{font-size:26px;font-weight:800;color:var(--wood-dark);margin-bottom:16px}
.contact-info>p{font-size:15px;color:var(--text-light);margin-bottom:30px;line-height:1.8}
.contact-item{display:flex;gap:16px;margin-bottom:24px}
.ci-icon{
  width:48px;height:48px;border-radius:12px;flex-shrink:0;
  background:var(--green-bg);display:flex;align-items:center;justify-content:center;color:var(--green);
}
.ci-icon svg{width:24px;height:24px}
.ci-text h4{font-size:16px;font-weight:700;color:var(--wood-dark);margin-bottom:4px}
.ci-text p{font-size:14px;color:var(--text-light)}
.ci-text a{color:var(--green);font-weight:600}
.wechat-section{margin-top:30px;padding:24px;background:var(--cream-dark);border-radius:var(--radius-lg);text-align:center}
.wechat-section h4{font-size:16px;font-weight:700;color:var(--wood-dark);margin-bottom:14px}
.wechat-qr{width:160px;height:160px;margin:0 auto 12px;background:#fff;padding:10px;border-radius:10px}
.wechat-qr img{width:100%;height:100%;object-fit:contain}
.wechat-section p{font-size:13px;color:var(--text-muted)}
.contact-form-wrap{
  background:#fff;padding:36px;border-radius:var(--radius-lg);
  box-shadow:var(--shadow);border:1px solid var(--border);
}
.contact-form-wrap h3{font-size:22px;font-weight:700;color:var(--wood-dark);margin-bottom:8px}
.form-sub{font-size:14px;color:var(--text-muted);margin-bottom:24px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-group{margin-bottom:18px}
.form-group label{display:block;font-size:14px;font-weight:600;color:var(--text-light);margin-bottom:6px}
.form-group .req{color:#E53935}
.form-group input,.form-group select,.form-group textarea{
  width:100%;padding:12px 14px;border:1px solid var(--border);
  border-radius:8px;font-size:14px;font-family:inherit;
  transition:border-color .3s;background:var(--cream);
}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{
  outline:none;border-color:var(--green);background:#fff;
}
.form-group textarea{min-height:100px;resize:vertical}
.form-submit{
  width:100%;padding:14px;background:var(--green);color:#fff;
  border:none;border-radius:8px;font-size:16px;font-weight:600;
  cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px;
  transition:background .3s;
}
.form-submit:hover{background:var(--green-light)}

/* ========== Product Detail ========== */
.product-detail{display:grid;grid-template-columns:1fr 1fr;gap:50px;margin-bottom:60px;align-items:start}
.product-detail-img{
  border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);
  position:sticky;top:100px;
}
.product-detail-img img{width:100%;height:400px;object-fit:cover}
.product-detail-info h1{font-size:30px;font-weight:800;color:var(--wood-dark);margin-bottom:12px}
.product-detail-info .subtitle{font-size:16px;color:var(--text-muted);margin-bottom:24px}
.product-specs{
  background:var(--cream-dark);border-radius:var(--radius-lg);
  padding:24px;margin-bottom:24px;
}
.product-specs h3{font-size:17px;font-weight:700;color:var(--wood-dark);margin-bottom:14px}
.spec-row{display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px solid var(--border);font-size:14px}
.spec-row:last-child{border-bottom:none}
.spec-row .label{color:var(--text-muted)}
.spec-row .value{color:var(--text);font-weight:600}
.product-features{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:24px}
.product-feature{
  display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-light);
}
.product-feature svg{width:18px;height:18px;color:var(--green);flex-shrink:0}
.product-cta{display:flex;gap:12px;flex-wrap:wrap}
.content-block{margin-bottom:50px}
.content-block h2{font-size:24px;font-weight:800;color:var(--wood-dark);margin-bottom:16px;padding-bottom:10px;border-bottom:2px solid var(--green-bg)}
.content-block h3{font-size:19px;font-weight:700;color:var(--wood-dark);margin:24px 0 12px}
.content-block p{font-size:15px;color:var(--text-light);line-height:1.9;margin-bottom:14px}
.content-block ul{margin:14px 0;padding-left:24px}
.content-block li{font-size:15px;color:var(--text-light);line-height:1.9;margin-bottom:8px}
.content-block table{width:100%;border-collapse:collapse;margin:16px 0;font-size:14px}
.content-block th,.content-block td{padding:10px 14px;text-align:left;border:1px solid var(--border)}
.content-block th{background:var(--cream-dark);font-weight:700;color:var(--wood-dark)}
.content-block tr:nth-child(even){background:var(--cream)}
.faq-item{
  background:#fff;border:1px solid var(--border);border-radius:10px;
  padding:20px 24px;margin-bottom:14px;
}
.faq-item h4{font-size:16px;font-weight:700;color:var(--wood-dark);margin-bottom:8px;display:flex;align-items:center;gap:8px}
.faq-item h4::before{content:'Q';color:var(--green);font-weight:800}
.faq-item p{font-size:14px;color:var(--text-light);line-height:1.8;padding-left:24px}
.process-flow{
  display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:8px;
  background:var(--cream-dark);padding:28px;border-radius:var(--radius-lg);margin:20px 0;
}
.process-step{
  background:#fff;padding:12px 18px;border-radius:8px;text-align:center;
  border:1px solid var(--border);font-size:14px;font-weight:600;color:var(--wood-dark);
}
.process-arrow{color:var(--green);font-size:20px;font-weight:700}

/* ========== Topic Page (专题页) ========== */
.topic-intro{display:grid;grid-template-columns:1.2fr 1fr;gap:50px;align-items:center;margin-bottom:60px}
.topic-intro-text h1{font-size:32px;font-weight:800;color:var(--wood-dark);margin-bottom:16px}
.topic-intro-text p{font-size:15px;color:var(--text-light);line-height:1.9;margin-bottom:14px}
.topic-intro-img{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow)}
.topic-intro-img img{width:100%;height:360px;object-fit:cover}
.topic-sub-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:20px;margin:30px 0}
.topic-sub-card{
  background:#fff;padding:24px;border-radius:var(--radius-lg);
  border:1px solid var(--border);transition:all .3s;
}
.topic-sub-card:hover{border-color:var(--green);box-shadow:var(--shadow);transform:translateY(-3px)}
.topic-sub-card h4{font-size:17px;font-weight:700;color:var(--wood-dark);margin-bottom:8px}
.topic-sub-card p{font-size:13px;color:var(--text-muted);line-height:1.7}
.topic-sub-card a{display:inline-block;margin-top:10px;font-size:13px;font-weight:600}

/* ========== Knowledge Article ========== */
.article-layout{display:grid;grid-template-columns:1fr 280px;gap:40px;align-items:start}
.article-content{background:#fff;padding:40px;border-radius:var(--radius-lg);border:1px solid var(--border)}
.article-content h1{font-size:28px;font-weight:800;color:var(--wood-dark);margin-bottom:16px;line-height:1.4}
.article-meta{display:flex;gap:16px;font-size:13px;color:var(--text-muted);margin-bottom:24px;padding-bottom:16px;border-bottom:1px solid var(--border)}
.article-sidebar{position:sticky;top:100px}
.sidebar-box{background:#fff;padding:24px;border-radius:var(--radius-lg);border:1px solid var(--border);margin-bottom:20px}
.sidebar-box h4{font-size:16px;font-weight:700;color:var(--wood-dark);margin-bottom:14px;padding-bottom:10px;border-bottom:2px solid var(--green-bg)}
.sidebar-box ul{list-style:none}
.sidebar-box li{margin-bottom:10px}
.sidebar-box a{font-size:14px;color:var(--text-light);display:block;line-height:1.5}
.sidebar-box a:hover{color:var(--green)}
.sidebar-cta{
  background:linear-gradient(135deg,var(--wood-dark),var(--wood-mid));
  color:#fff;padding:24px;border-radius:var(--radius-lg);text-align:center;
}
.sidebar-cta h4{color:#fff;margin-bottom:8px}
.sidebar-cta p{font-size:13px;color:rgba(255,255,255,0.8);margin-bottom:14px}
.sidebar-cta .phone{font-size:22px;font-weight:800;color:var(--green-light)}

/* ========== Responsive ========== */
@media(max-width:992px){
  .hero h1{font-size:32px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .about-hero,.contact-grid,.product-detail,.topic-intro{grid-template-columns:1fr}
  .about-hero-img img,.product-detail-img img,.topic-intro-img img{height:300px}
  .product-detail-img{position:static}
  .article-layout{grid-template-columns:1fr}
  .article-sidebar{position:static}
}
@media(max-width:768px){
  .nav{
    display:none;position:absolute;top:72px;left:0;right:0;
    background:#fff;flex-direction:column;padding:16px;
    box-shadow:var(--shadow);border-top:1px solid var(--border);
  }
  .nav.open{display:flex}
  .nav a{padding:12px 16px}
  .mobile-menu-btn{display:flex}
  .header-phone{display:none}
  .hero{padding:50px 0 70px}
  .hero h1{font-size:26px}
  .hero p{font-size:15px}
  .section{padding:50px 0}
  .section-title h2{font-size:24px}
  .page-header h1{font-size:26px}
  .form-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .cta-band-inner{flex-direction:column;text-align:center}
  .floating-contact{right:10px;bottom:80px}
  .fc-btn{width:44px;height:44px}
  .article-content{padding:24px}
  .article-content h1{font-size:22px}
}