/* ========== Reset & Base ========== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:17px}
body{
    font-family:"Microsoft YaHei","PingFang SC","Helvetica Neue",Arial,sans-serif;
    color:#333;line-height:1.8;background:#f8f6f2;overflow-x:hidden;
    -webkit-font-smoothing:antialiased
}
a{text-decoration:none;color:inherit}
ul{list-style:none}
img{max-width:100%;display:block}
.container{max-width:1260px;margin:0 auto;padding:0 24px}
.section{padding:90px 0}

/* ========== Breadcrumb ========== */
.breadcrumb{background:#fafaf7;border-bottom:1px solid #eee;padding:14px 0}
.breadcrumb .container{display:flex;align-items:center;gap:8px;font-size:0.88rem;color:#999}
.breadcrumb a{color:#1a4a2a;transition:color 0.3s}
.breadcrumb a:hover{color:#3d8b3d}
.breadcrumb span{color:#666}

/* ========== Top Bar ========== */
.topbar{
    background:#1a1a1a;color:#b0b0b0;font-size:0.9rem;padding:7px 0
}
.topbar .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px}
.topbar a{color:#ddd;margin-left:16px;transition:color 0.3s}
.topbar a:hover{color:#5cb85c}

/* ========== Language Switcher ========== */
.lang-switcher{display:flex;gap:2px;align-items:center}
.lang-btn{
    background:transparent;color:#999;border:1px solid #444;
    padding:3px 11px;border-radius:3px;cursor:pointer;font-size:0.78rem;
    transition:all 0.3s;font-family:inherit
}
.lang-btn:hover{border-color:#888;color:#ddd}
.lang-btn.active{background:#3d8b3d;color:#fff;border-color:#3d8b3d;font-weight:600}

/* ========== Header ========== */
.header{
    background:rgba(255,255,255,0.97);backdrop-filter:blur(10px);
    box-shadow:0 1px 0 rgba(0,0,0,0.04);position:sticky;top:0;z-index:999
}
.header .container{display:flex;justify-content:space-between;align-items:center;padding:12px 24px}
.logo{display:flex;align-items:center;gap:14px}
.logo svg{width:48px;height:48px;flex-shrink:0}
.logo-text h1{font-size:1.1rem;color:#1a1a1a;font-weight:700;line-height:1.3;letter-spacing:2px}
.logo-text span{font-size:0.65rem;color:#999;letter-spacing:3px;text-transform:uppercase}
.nav{display:flex;gap:36px}
.nav a{
    font-size:0.95rem;color:#555;font-weight:500;position:relative;
    padding:8px 0;transition:color 0.3s;cursor:pointer;letter-spacing:1px
}
.nav a::after{
    content:'';position:absolute;bottom:0;left:0;width:0;height:1.5px;
    background:#1a4a2a;transition:width 0.3s
}
.nav a:hover,.nav a.active{color:#1a4a2a}
.nav a:hover::after,.nav a.active::after{width:100%}
.menu-btn{display:none;font-size:1.5rem;cursor:pointer;color:#333}

/* ========== Hero ========== */
.hero{
    position:relative;min-height:680px;
    background:linear-gradient(175deg,#0a1a14 0%,#1a2a1a 45%,#0a1a14 100%);
    display:flex;align-items:center;justify-content:center;text-align:center;
    padding:100px 20px;overflow:visible
}
.hero::after{
    content:'';position:absolute;left:0;right:0;bottom:0;height:160px;
    background:linear-gradient(to top,rgba(0,0,0,0.55),transparent);z-index:1
}
.hero-content{position:relative;z-index:2;max-width:860px;color:#fff}
.hero-content .hero-badge{
    display:inline-block;background:rgba(255,255,255,0.08);
    border:1px solid rgba(255,255,255,0.2);padding:8px 24px;
    font-size:0.82rem;margin-bottom:32px;letter-spacing:5px;text-transform:uppercase
}
.hero-content h2{font-size:3.6rem;font-weight:700;margin-bottom:18px;letter-spacing:5px;text-shadow:0 4px 20px rgba(0,0,0,0.5);line-height:1.25}
.hero-content .hero-sub{font-size:1.25rem;color:rgba(255,255,255,0.82);margin-bottom:44px;line-height:2;text-shadow:0 2px 10px rgba(0,0,0,0.4);font-weight:300}
.hero-btns{display:flex;gap:20px;justify-content:center;flex-wrap:wrap}
.btn{
    display:inline-block;padding:15px 42px;
    font-size:1rem;font-weight:600;cursor:pointer;transition:all 0.35s;
    border:none;letter-spacing:3px
}
.btn-primary{background:#1a4a2a;color:#fff;box-shadow:0 4px 20px rgba(15,40,20,0.4)}
.btn-primary:hover{background:#143820;transform:translateY(-2px);box-shadow:0 8px 28px rgba(15,40,20,0.5)}
.btn-outline{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,0.5)}
.btn-outline:hover{background:#fff;color:#111}

/* ========== Page Header (internal pages) ========== */
.page-hero{
    position:relative;min-height:280px;
    background:linear-gradient(175deg,#0a1a14 0%,#1a4a2a 100%);
    display:flex;align-items:center;justify-content:center;text-align:center;
    padding:80px 20px
}
.page-hero-content{position:relative;z-index:2;max-width:800px;color:#fff}
.page-hero-content h1{font-size:2.4rem;font-weight:700;margin-bottom:12px;letter-spacing:4px}
.page-hero-content p{font-size:1.1rem;color:rgba(255,255,255,0.75);letter-spacing:2px}

/* ========== Section Headers ========== */
.section-header{text-align:center;margin-bottom:60px}
.section-header h2{font-size:2.2rem;font-weight:700;color:#1a1a1a;letter-spacing:2px;margin-bottom:10px}
.section-header .en{font-size:0.88rem;color:#aaa;letter-spacing:4px;text-transform:uppercase}
.section-header .divider{
    width:40px;height:2px;background:#8b7355;margin:16px auto 0
}

/* ========== Features Strip ========== */
.features-strip{background:#151515;padding:50px 0}
.features-strip .container{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.fs-item{
    text-align:center;color:#ccc;padding:0 28px;
    border-right:1px solid rgba(255,255,255,0.06)
}
.fs-item:last-child{border-right:none}
.fs-item .fs-icon{font-size:1.8rem;margin-bottom:12px;opacity:0.7}
.fs-item h4{font-size:1.1rem;color:#ddd;margin-bottom:6px;letter-spacing:2px;font-weight:500}
.fs-item p{font-size:0.88rem;color:#888;line-height:1.6}

/* ========== About ========== */
.about{background:#fff}
.about .container{display:grid;grid-template-columns:1.15fr 1fr;gap:70px;align-items:center}
.about-img{
    position:relative;overflow:hidden;box-shadow:0 12px 40px rgba(0,0,0,0.1)
}
.about-img img{width:100%;height:440px;object-fit:cover;transition:transform 0.8s;filter:brightness(0.95)}
.about-img:hover img{transform:scale(1.03);filter:brightness(1)}
.about-text h2{font-size:2.2rem;color:#1a1a1a;margin-bottom:22px;letter-spacing:2px}
.about-text .lead{font-size:1.1rem;color:#555;margin-bottom:18px;line-height:2;font-weight:400}
.about-text p{color:#777;margin-bottom:14px;line-height:2;font-size:1rem}
.about-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:30px}
.stat-item{
    text-align:center;padding:22px 12px;background:#fafaf7;
    border:1px solid #eee
}
.stat-num{font-size:2.2rem;font-weight:700;color:#1a4a2a}
.stat-label{font-size:0.85rem;color:#999;margin-top:4px;letter-spacing:2px;text-transform:uppercase}

/* ========== Products ========== */
.products{background:#f8f6f2}
.product-category{
    background:#fff;overflow:hidden;
    box-shadow:0 1px 4px rgba(0,0,0,0.04);margin-bottom:36px
}
.product-cat-header{
    display:flex;align-items:center;justify-content:space-between;
    padding:28px 32px;border-bottom:1px solid #f0ede6;
    gap:16px;flex-wrap:wrap
}
.product-cat-header .cat-info h3{font-size:1.3rem;color:#1a1a1a;letter-spacing:2px;margin-bottom:4px;font-weight:600}
.product-cat-header .cat-info p{font-size:0.92rem;color:#999}
.product-cat-header .cat-badge{
    background:#1a1a1a;color:#c8b89a;padding:6px 16px;
    font-size:0.82rem;letter-spacing:2px;white-space:nowrap;text-transform:uppercase
}
.product-gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.product-gallery.col3{grid-template-columns:repeat(3,1fr)}
.gallery-item{
    position:relative;overflow:hidden;border-right:1px solid #f6f3ed;
    border-bottom:1px solid #f6f3ed;cursor:pointer
}
.gallery-item:nth-child(4n){border-right:none}
.col3 .gallery-item:nth-child(3n){border-right:none}
.gallery-item .gi-img{width:100%;height:260px;object-fit:cover;transition:transform 0.6s;filter:brightness(0.92)}
.gallery-item:hover .gi-img{transform:scale(1.05);filter:brightness(1)}
.gallery-item .gi-overlay{
    position:absolute;bottom:0;left:0;right:0;
    background:linear-gradient(to top,rgba(0,0,0,0.75),transparent);
    padding:44px 16px 14px;color:#fff;transition:all 0.3s
}
.gallery-item .gi-label{font-size:0.92rem;font-weight:500;letter-spacing:1px}
.gallery-item .gi-sub{font-size:0.78rem;color:#bbb;margin-top:2px;letter-spacing:0.5px}
.gallery-item::after{
    content:'+';position:absolute;top:14px;right:14px;
    font-size:1.4rem;opacity:0;transition:opacity 0.3s;color:#fff;
    background:rgba(0,0,0,0.4);width:32px;height:32px;
    border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:300
}
.gallery-item:hover::after{opacity:1}

/* Product detail page styles */
.prod-detail{background:#fff;padding:60px 0}
.prod-detail h2{font-size:1.8rem;color:#1a1a1a;margin-bottom:20px;letter-spacing:2px}
.prod-detail h3{font-size:1.3rem;color:#333;margin:30px 0 12px;letter-spacing:1px}
.prod-detail p{color:#666;line-height:2;margin-bottom:14px;font-size:1rem}
.prod-detail ul{margin:10px 0 20px 20px}
.prod-detail ul li{position:relative;padding-left:20px;margin-bottom:8px;color:#666;line-height:1.8}
.prod-detail ul li::before{content:'▸';position:absolute;left:0;color:#1a4a2a}
.prod-specs{background:#fafaf7;border:1px solid #eee;padding:28px 32px;margin:24px 0;border-radius:4px}
.prod-specs h4{color:#1a1a1a;margin-bottom:14px;letter-spacing:1px}
.prod-specs table{width:100%;border-collapse:collapse}
.prod-specs td{padding:10px 14px;border-bottom:1px solid #eee;font-size:0.92rem;color:#666}
.prod-specs td:first-child{font-weight:600;color:#333;width:35%}

/* ========== Advantages ========== */
.advantages{background:#fff}
.advantages .container{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.adv-card{
    display:flex;gap:18px;padding:30px 24px;background:#fff;
    border:1px solid #eee;transition:all 0.35s
}
.adv-card:hover{border-color:#ccc;box-shadow:0 8px 28px rgba(0,0,0,0.06)}
.adv-num{font-size:2.4rem;font-weight:700;color:#ddd;line-height:1;min-width:48px}
.adv-content h4{font-size:1.12rem;color:#1a1a1a;margin-bottom:6px;letter-spacing:1px;font-weight:600}
.adv-content p{font-size:0.92rem;color:#999;line-height:1.7}

/* ========== Cases ========== */
.cases{background:#f8f6f2}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.case-card{
    position:relative;overflow:hidden;
    box-shadow:0 2px 8px rgba(0,0,0,0.06);transition:all 0.4s;
    cursor:pointer;background:#fff
}
.case-card:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(0,0,0,0.14)}
.case-img-wrap{height:280px;overflow:hidden;position:relative}
.case-img-wrap img{width:100%;height:100%;object-fit:cover;transition:transform 0.7s;filter:brightness(0.9)}
.case-card:hover .case-img-wrap img{transform:scale(1.06);filter:brightness(1)}
.case-img-wrap::after{
    content:'';position:absolute;bottom:0;left:0;right:0;height:100px;
    background:linear-gradient(to top,rgba(0,0,0,0.8),transparent)
}
.case-info{
    position:absolute;bottom:0;left:0;right:0;z-index:2;
    padding:18px 20px;color:#fff
}
.case-info h4{font-size:1.02rem;margin-bottom:6px;letter-spacing:1px;font-weight:500}
.case-info .case-tag{
    display:inline-block;font-size:0.76rem;background:rgba(255,255,255,0.15);
    padding:3px 12px;letter-spacing:2px;text-transform:uppercase
}

/* ========== CTA ========== */
.cta{
    background:#151515;text-align:center;padding:80px 20px;color:#fff;
    position:relative;overflow:hidden
}
.cta>*{position:relative;z-index:1}
.cta h2{font-size:2rem;margin-bottom:12px;letter-spacing:3px;font-weight:600}
.cta p{color:#999;margin-bottom:34px;font-size:1.05rem;letter-spacing:1px}
.cta .btn-outline{border-color:rgba(255,255,255,0.4)}
.cta .btn-outline:hover{background:#fff;color:#111}

/* ========== Contact ========== */
.contact{background:#fff}
.contact .container{display:grid;grid-template-columns:1fr 1.2fr;gap:60px}
.contact-info h2{font-size:2.2rem;color:#1a1a1a;margin-bottom:16px;letter-spacing:2px}
.contact-info>p{color:#999;margin-bottom:30px;font-size:1rem}
.contact-list{margin-bottom:18px}
.contact-item{display:flex;gap:14px;align-items:flex-start;margin-bottom:18px}
.contact-icon{
    width:40px;height:40px;background:#f5f3ed;border-radius:50%;
    display:flex;align-items:center;justify-content:center;
    font-size:1.1rem;flex-shrink:0;color:#8b7355
}
.contact-item h5{font-size:0.92rem;color:#333;margin-bottom:2px;letter-spacing:1px;font-weight:600}
.contact-item span{font-size:0.92rem;color:#888}
.contact-form{
    background:#fafaf7;border:1px solid #eee;padding:38px
}
.contact-form h3{color:#1a1a1a;margin-bottom:6px;letter-spacing:2px}
.contact-form>p{color:#aaa;font-size:0.82rem;margin-bottom:24px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:14px}
.form-group{display:flex;flex-direction:column}
.form-group label{font-size:0.9rem;color:#555;font-weight:500;margin-bottom:5px;letter-spacing:1px}
.form-group input,.form-group textarea,.form-group select{
    padding:12px 14px;border:1px solid #e0ddd5;font-size:0.95rem;
    font-family:inherit;transition:border 0.3s;outline:none;background:#fff
}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{
    border-color:#8b7355;box-shadow:0 0 0 3px rgba(139,115,85,0.06)
}
.form-group textarea{resize:vertical;min-height:120px}
.form-group.full{grid-column:1/-1}

/* ========== Footer ========== */
.footer{background:#111;color:#888;padding:50px 0 0}
.footer-grid{
    display:grid;grid-template-columns:2fr 1fr 1fr 1.5fr;gap:44px;padding-bottom:44px
}
.footer h4{color:#ccc;font-size:1rem;margin-bottom:18px;letter-spacing:2px;font-weight:500;text-transform:uppercase}
.footer-about p{font-size:0.88rem;line-height:2;margin-bottom:10px;color:#888}
.footer-links li{margin-bottom:9px}
.footer-links a{font-size:0.88rem;color:#888;transition:color 0.3s;cursor:pointer}
.footer-links a:hover{color:#c8b89a}
.footer-bottom{
    border-top:1px solid rgba(255,255,255,0.04);
    padding:16px 0;text-align:center;font-size:0.84rem;color:#777
}
.footer-bottom span{color:#c8b89a}

/* ========== Float Contact ========== */
.float-bar{
    position:fixed;right:12px;bottom:100px;z-index:998;display:flex;flex-direction:column;gap:6px
}
.float-btn{
    display:flex;align-items:center;gap:10px;
    padding:10px 16px;
    font-size:0.8rem;cursor:pointer;
    box-shadow:0 2px 12px rgba(0,0,0,0.15);color:#fff;
    transition:all 0.3s;white-space:nowrap;text-decoration:none
}
.float-btn .f-icon{font-size:1.1rem;flex-shrink:0}
.float-btn .f-text{font-size:0.78rem;font-weight:400;letter-spacing:1px}
.float-btn.tel{background:#1a1a1a}
.float-btn.qq{background:#2a2a2a}
.float-btn.wx{background:#333}
.float-btn.top{background:#555;justify-content:center;padding:10px 16px}
.float-btn:hover{transform:translateX(-4px);box-shadow:0 6px 20px rgba(0,0,0,0.3)}

/* ========== Responsive ========== */
@media(max-width:1024px){
    .product-gallery,.product-gallery.col3{grid-template-columns:repeat(2,1fr)}
    .advantages .container{grid-template-columns:repeat(2,1fr)}
    .features-strip .container{grid-template-columns:repeat(2,1fr)}
    .fs-item{border-right:none;border-bottom:1px solid rgba(255,255,255,0.08);padding:20px 24px}
    .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
    .nav{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;
        flex-direction:column;gap:0;box-shadow:0 10px 24px rgba(0,0,0,0.12)}
    .nav.show{display:flex}
    .nav a{padding:14px 24px;border-top:1px solid #f0f0f0}
    .menu-btn{display:block}
    .hero-content h2{font-size:1.7rem;letter-spacing:2px}
    .hero{min-height:440px}
    .page-hero{min-height:200px}
    .page-hero-content h1{font-size:1.6rem}
    .about .container,.contact .container{grid-template-columns:1fr}
    .product-gallery,.product-gallery.col3,.case-grid{grid-template-columns:1fr}
    .advantages .container,.features-strip .container{grid-template-columns:1fr}
    .fs-item{border-right:none;border-bottom:1px solid rgba(255,255,255,0.08)}
    .form-row{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:1fr}
    .section{padding:56px 0}
    .section-header h2{font-size:1.5rem}
    .gallery-item .gi-img{height:220px}
    .case-img-wrap{height:240px}
    .float-btn .f-text{display:none}
    .float-btn{padding:10px 12px;border-radius:50%}
}