/* ===== 全局样式 ===== */
*{margin:0;padding:0;box-sizing:border-box}
:root{
    --primary:#ff6b00;
    --primary-dark:#e55a00;
    --primary-light:#ff8c33;
    --secondary:#0066cc;
    --secondary-dark:#004d99;
    --accent:#00a8ff;
    --accent-purple:#7c3aed;
    --accent-teal:#0d9488;
    --accent-rose:#e11d48;
    --accent-amber:#d97706;
    --bg-dark:#0d1117;
    --bg-darker:#060a12;
    --bg-card:#161b27;
    --bg-light:#f5f7fa;
    --bg-light-warm:#fef7f0;
    --bg-light-blue:#f0f7ff;
    --text-primary:#1a1a2e;
    --text-light:#ffffff;
    --text-gray:#8b95a7;
    --text-gray-dark:#5a6577;
    --border:#e2e8f0;
    --border-light:#f0f2f5;
    --shadow:0 4px 20px rgba(0,0,0,0.08);
    --shadow-hover:0 10px 40px rgba(0,0,0,0.15);
    --gradient:linear-gradient(135deg,#ff6b00 0%,#ff9500 100%);
    --gradient-warm:linear-gradient(135deg,#ff6b00 0%,#e11d48 100%);
    --gradient-blue:linear-gradient(135deg,#0066cc 0%,#00a8ff 100%);
    --gradient-purple:linear-gradient(135deg,#7c3aed 0%,#a78bfa 100%);
    --gradient-teal:linear-gradient(135deg,#0d9488 0%,#2dd4bf 100%);
    --gradient-dark:linear-gradient(135deg,#1a1a2e 0%,#16213e 50%,#0f3460 100%);
}
html{scroll-behavior:smooth}
body{
    font-family:'PingFang SC','Microsoft YaHei','Helvetica Neue',sans-serif;
    color:var(--text-primary);
    line-height:1.6;
    overflow-x:hidden;
    background:#fff;
}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%;height:auto}
.accent-text{color:var(--primary)}

/* ===== 顶部信息条 ===== */
.top-bar{
    background:var(--gradient-dark);
    color:#a0aabf;
    font-size:13px;
    padding:8px 0;
    position:relative;
}
.top-bar::after{
    content:'';position:absolute;bottom:0;left:0;width:100%;height:1px;
    background:linear-gradient(90deg,transparent,var(--primary),var(--accent),transparent);
}
.top-bar .container{display:flex;justify-content:space-between;align-items:center}
.top-bar-left,.top-bar-right{display:flex;gap:25px}
.top-bar i{color:var(--primary);margin-right:5px}

/* ===== 导航栏 ===== */
.navbar{
    position:sticky;top:0;z-index:1000;
    background:#fff;
    box-shadow:0 2px 10px rgba(0,0,0,0.06);
    transition:all 0.3s;
}
.navbar.scrolled{box-shadow:0 4px 20px rgba(0,0,0,0.1)}
.nav-container{
    max-width:1200px;margin:0 auto;padding:12px 20px;
    display:flex;align-items:center;justify-content:space-between;
}
.logo{display:flex;align-items:center;gap:12px}
.logo-img{max-height:55px;max-width:160px;width:auto;height:auto;object-fit:contain;transition:transform .3s ease}
.logo-img:hover{transform:scale(1.05)}
.logo-icon{
    width:44px;height:44px;
    background:var(--gradient);
    border-radius:10px;
    display:flex;align-items:center;justify-content:center;
    box-shadow:0 4px 12px rgba(255,107,0,0.3);
}
.logo-icon i{color:#fff;font-size:1.3rem}
.logo-text{display:flex;flex-direction:column;line-height:1.1}
.logo-main{font-size:1.3rem;font-weight:800;color:var(--text-primary)}
.logo-sub{font-size:0.65rem;color:var(--text-gray);letter-spacing:1px}
.nav-menu{display:flex;list-style:none;gap:5px}
.nav-link{
    padding:10px 18px;border-radius:8px;
    font-size:0.95rem;font-weight:500;
    color:var(--text-primary);
    transition:all 0.3s;position:relative;
}
.nav-link:hover,.nav-link.active{color:var(--primary);background:rgba(255,107,0,0.08)}
.nav-link.active::after{
    content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);
    width:20px;height:3px;background:var(--primary);border-radius:2px;
}
.nav-cta{
    background:var(--gradient);color:#fff;
    padding:10px 22px;border-radius:25px;
    font-size:0.9rem;font-weight:600;
    display:flex;align-items:center;gap:8px;
    transition:all 0.3s;box-shadow:0 4px 12px rgba(255,107,0,0.3);
}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 6px 18px rgba(255,107,0,0.4)}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer}
.hamburger span{width:25px;height:3px;background:var(--text-primary);border-radius:2px;transition:0.3s}

/* ===== 通用按钮 ===== */
.btn{
    display:inline-flex;align-items:center;gap:10px;
    padding:14px 32px;border-radius:30px;
    font-weight:600;font-size:1rem;cursor:pointer;
    border:none;transition:all 0.3s;
}
.btn-primary{background:var(--gradient);color:#fff;box-shadow:0 6px 20px rgba(255,107,0,0.3)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 10px 30px rgba(255,107,0,0.4)}
.btn-outline{background:transparent;color:#fff;border:2px solid rgba(255,255,255,0.5)}
.btn-outline:hover{background:#fff;color:var(--text-primary);border-color:#fff}
.btn-full{width:100%;justify-content:center}

/* ===== Section通用 ===== */
section{padding:80px 0;position:relative}
.section-header{text-align:center;margin-bottom:50px}
.section-tag{
    display:inline-block;padding:5px 18px;
    background:linear-gradient(135deg,rgba(255,107,0,0.08),rgba(0,168,255,0.08));
    color:var(--primary);
    border:1px solid rgba(255,107,0,0.15);
    border-radius:20px;font-size:0.8rem;letter-spacing:2px;
    margin-bottom:15px;font-weight:600;
}
.section-title{font-size:2.2rem;font-weight:800;color:var(--text-primary);margin-bottom:10px}
.section-subtitle{color:var(--text-gray-dark);font-size:1.05rem}

/* ===== Hero ===== */
.hero{
    min-height:600px;
    background:linear-gradient(135deg,#0d1117 0%,#1a1f35 50%,#0d1117 100%);
    color:#fff;
    display:flex;flex-direction:column;justify-content:center;
    padding:100px 0 0;position:relative;overflow:hidden;
}
.hero-bg{position:absolute;top:0;left:0;width:100%;height:100%;z-index:0}
.hero-overlay{
    position:absolute;top:0;left:0;width:100%;height:100%;
    background:
        radial-gradient(circle at 20% 50%,rgba(255,107,0,0.15) 0%,transparent 50%),
        radial-gradient(circle at 80% 30%,rgba(0,168,255,0.12) 0%,transparent 50%);
}
.grid-lines{
    position:absolute;top:0;left:0;width:100%;height:100%;
    background-image:
        linear-gradient(rgba(255,255,255,0.03) 1px,transparent 1px),
        linear-gradient(90deg,rgba(255,255,255,0.03) 1px,transparent 1px);
    background-size:40px 40px;
}
.hero-content{position:relative;z-index:2;text-align:center;max-width:800px}
.hero-badge{
    display:inline-flex;align-items:center;gap:10px;
    padding:8px 22px;background:rgba(255,107,0,0.15);
    border:1px solid rgba(255,107,0,0.4);border-radius:30px;
    font-size:0.9rem;color:var(--primary);margin-bottom:25px;
}
.hero-badge i{font-size:1rem}
.hero-title{font-size:3rem;font-weight:800;margin-bottom:20px;line-height:1.3}
.hero-line1{display:block}
.hero-line2{display:block;font-size:2rem;color:#a0aabf}
.hero-line2 em{font-style:normal;color:var(--primary);background:rgba(255,107,0,0.15);padding:0 12px;border-radius:6px}
.hero-desc{font-size:1.05rem;color:#a0aabf;margin-bottom:35px;line-height:1.8}
.hero-buttons{display:flex;gap:20px;justify-content:center;flex-wrap:wrap}
.hero-stats{
    position:relative;z-index:2;
    display:grid;grid-template-columns:repeat(4,1fr);
    gap:20px;margin-top:70px;padding-bottom:40px;
}
.stat-card{
    background:rgba(255,255,255,0.05);backdrop-filter:blur(10px);
    border:1px solid rgba(255,255,255,0.1);
    border-radius:16px;padding:25px 20px;
    display:flex;align-items:center;gap:18px;
    transition:all 0.3s;
}
.stat-card:hover{background:rgba(255,107,0,0.1);border-color:rgba(255,107,0,0.3);transform:translateY(-5px)}
.stat-icon{
    width:50px;height:50px;background:var(--gradient);
    border-radius:12px;display:flex;align-items:center;justify-content:center;
    flex-shrink:0;
}
.stat-card:nth-child(1) .stat-icon{background:var(--gradient)}
.stat-card:nth-child(2) .stat-icon{background:var(--gradient-blue)}
.stat-card:nth-child(3) .stat-icon{background:var(--gradient-purple)}
.stat-card:nth-child(4) .stat-icon{background:var(--gradient-teal)}
.stat-icon i{color:#fff;font-size:1.3rem}
.stat-info{flex:1}
.stat-number{font-size:2rem;font-weight:800;color:#fff;line-height:1}
.stat-number span{font-size:1.2rem;color:var(--primary)}
.stat-unit{font-size:0.85rem;color:var(--primary);margin-top:2px}
.stat-card:nth-child(1) .stat-unit{color:var(--primary)}
.stat-card:nth-child(2) .stat-unit{color:var(--secondary)}
.stat-card:nth-child(3) .stat-unit{color:var(--accent-purple)}
.stat-card:nth-child(4) .stat-unit{color:var(--accent-teal)}
.stat-label{font-size:0.85rem;color:#a0aabf;margin-top:4px}

/* ===== 关于我们 ===== */
.about{background:#fff;position:relative}
.about::before{
    content:'';position:absolute;top:0;right:0;width:40%;height:100%;
    background:linear-gradient(135deg,transparent 0%,rgba(255,107,0,0.03) 100%);
    pointer-events:none;
}
.about-grid{display:grid;grid-template-columns:1fr 1.3fr;gap:50px;align-items:start}
.about-img-wrapper{position:relative;border-radius:20px;overflow:hidden;box-shadow:var(--shadow-hover)}
.about-img-wrapper img{width:100%;height:450px;object-fit:cover}
.about-img-badge{
    position:absolute;bottom:20px;left:20px;
    background:rgba(13,17,23,0.9);backdrop-filter:blur(10px);
    border-radius:14px;padding:20px 25px;
    display:flex;align-items:center;gap:15px;
    border:1px solid rgba(255,107,0,0.3);
}
.badge-number{font-size:2.5rem;font-weight:800;color:var(--primary);line-height:1}
.badge-number span{font-size:1rem}
.badge-text{font-size:0.9rem;color:#fff}
.about-right{padding-top:10px}
.about-title{font-size:1.6rem;color:var(--text-primary);margin-bottom:20px;position:relative;padding-left:15px}
.about-title::before{content:'';position:absolute;left:0;top:50%;transform:translateY(-50%);width:4px;height:24px;background:var(--primary);border-radius:2px}
.about-right p{color:var(--text-gray-dark);margin-bottom:16px;line-height:1.9}
.about-right strong{color:var(--text-primary)}
.about-features{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:30px}
.feature-item{display:flex;gap:15px;align-items:flex-start}
.feature-icon{
    width:45px;height:45px;flex-shrink:0;
    background:rgba(255,107,0,0.1);border-radius:10px;
    display:flex;align-items:center;justify-content:center;
}
.feature-item:nth-child(2) .feature-icon{background:rgba(0,102,204,0.1)}
.feature-item:nth-child(3) .feature-icon{background:rgba(124,58,237,0.1)}
.feature-item:nth-child(4) .feature-icon{background:rgba(13,148,136,0.1)}
.feature-icon i{color:var(--primary);font-size:1.2rem}
.feature-item:nth-child(2) .feature-icon i{color:var(--secondary)}
.feature-item:nth-child(3) .feature-icon i{color:var(--accent-purple)}
.feature-item:nth-child(4) .feature-icon i{color:var(--accent-teal)}
.feature-text h4{font-size:1rem;color:var(--text-primary);margin-bottom:5px}
.feature-text p{font-size:0.85rem;color:var(--text-gray-dark);margin:0;line-height:1.5}

/* ===== 产品中心 ===== */
.products{background:linear-gradient(180deg,var(--bg-light-warm) 0%,var(--bg-light) 50%,#fff 100%)}
.product-categories{display:grid;grid-template-columns:repeat(3,1fr);gap:25px;margin-bottom:60px}
.category-card{
    background:#fff;border-radius:16px;overflow:hidden;
    box-shadow:var(--shadow);transition:all 0.3s;
    border:1px solid var(--border);
}
.category-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-hover);border-color:var(--primary)}
.category-img{height:200px;overflow:hidden;position:relative}
.category-img img{width:100%;height:100%;object-fit:cover;transition:transform 0.5s}
.category-card:hover .category-img img{transform:scale(1.1)}
.category-body{padding:25px;position:relative}
.category-icon{
    position:absolute;top:-25px;right:20px;
    width:50px;height:50px;background:var(--gradient);
    border-radius:12px;display:flex;align-items:center;justify-content:center;
    box-shadow:0 4px 12px rgba(255,107,0,0.3);
}
.category-card:nth-child(1) .category-icon{background:var(--gradient)}
.category-card:nth-child(2) .category-icon{background:var(--gradient-blue)}
.category-card:nth-child(3) .category-icon{background:var(--gradient-purple)}
.category-card:nth-child(4) .category-icon{background:var(--gradient-teal)}
.category-card:nth-child(5) .category-icon{background:var(--gradient-warm)}
.category-card:nth-child(6) .category-icon{background:linear-gradient(135deg,#d97706,#f59e0b)}
.category-icon i{color:#fff;font-size:1.3rem}
.category-body h3{font-size:1.2rem;color:var(--text-primary);margin-bottom:10px}
.category-body p{font-size:0.9rem;color:var(--text-gray-dark);margin-bottom:15px;line-height:1.6}
.category-link{color:var(--primary);font-size:0.9rem;font-weight:600;display:inline-flex;align-items:center;gap:6px;transition:gap 0.3s}
.category-link:hover{gap:12px}

.product-list-header{text-align:center;margin-bottom:30px}
.product-list-header h3{font-size:1.5rem;color:var(--text-primary)}
.product-list-header p{color:var(--text-gray-dark);font-size:0.95rem}
.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.product-card{
    background:#fff;border-radius:12px;overflow:hidden;
    box-shadow:var(--shadow);transition:all 0.3s;
    border:1px solid var(--border);
}
.product-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover);border-color:var(--primary)}
.product-img{height:160px;overflow:hidden;position:relative}
.product-img img{width:100%;height:100%;object-fit:cover;transition:transform 0.5s}
.product-card:hover .product-img img{transform:scale(1.1)}
.product-tag{
    position:absolute;top:10px;left:10px;
    background:var(--gradient);color:#fff;
    padding:3px 12px;border-radius:20px;
    font-size:0.75rem;font-weight:600;
}
.product-card:nth-child(1) .product-tag{background:var(--gradient-warm)}
.product-card:nth-child(2) .product-tag{background:var(--gradient-blue)}
.product-info{padding:15px}
.product-info h4{font-size:1rem;color:var(--text-primary);margin-bottom:6px}
.product-info p{font-size:0.85rem;color:var(--text-gray-dark);line-height:1.5}

/* ===== 案例展示 ===== */
.cases{background:#fff}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px}
.case-card{
    background:#fff;border-radius:16px;overflow:hidden;
    box-shadow:var(--shadow);transition:all 0.3s;
    border:1px solid var(--border);
}
.case-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-hover)}
.case-img{height:220px;overflow:hidden;position:relative}
.case-img img{width:100%;height:100%;object-fit:cover;transition:transform 0.5s}
.case-card:hover .case-img img{transform:scale(1.1)}
.case-overlay{
    position:absolute;top:0;left:0;width:100%;height:100%;
    background:rgba(255,107,0,0.7);
    display:flex;align-items:center;justify-content:center;
    opacity:0;transition:opacity 0.3s;
}
.case-card:hover .case-overlay{opacity:1}
.case-overlay i{color:#fff;font-size:2rem}
.case-body{padding:20px}
.case-date{font-size:0.8rem;color:var(--primary);display:flex;align-items:center;gap:6px;margin-bottom:8px}
.case-body h4{font-size:1.1rem;color:var(--text-primary);margin-bottom:10px}
.case-body p{font-size:0.85rem;color:var(--text-gray-dark);line-height:1.6;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.more-btn-wrapper{text-align:center;margin-top:40px}
.more-btn-wrapper .btn-outline{color:var(--primary);border-color:var(--primary)}
.more-btn-wrapper .btn-outline:hover{background:var(--primary);color:#fff}

/* ===== 新闻中心 ===== */
.news{background:var(--bg-light)}
.news-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:30px}
.news-featured{
    background:#fff;border-radius:16px;overflow:hidden;
    box-shadow:var(--shadow);transition:all 0.3s;
}
.news-featured:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.news-img{height:280px;overflow:hidden}
.news-img img{width:100%;height:100%;object-fit:cover;transition:transform 0.5s}
.news-featured:hover .news-img img{transform:scale(1.05)}
.news-body{padding:25px}
.news-date{font-size:0.85rem;color:var(--primary);font-weight:600;margin-bottom:10px;display:block}
.news-body h4{font-size:1.25rem;color:var(--text-primary);margin-bottom:12px;line-height:1.5}
.news-body p{font-size:0.9rem;color:var(--text-gray-dark);line-height:1.7;margin-bottom:15px}
.news-link{color:var(--primary);font-weight:600;font-size:0.9rem;display:inline-flex;align-items:center;gap:6px;transition:gap 0.3s}
.news-link:hover{gap:12px}
.news-side{display:flex;flex-direction:column;gap:20px}
.news-item{
    background:#fff;border-radius:12px;padding:20px;
    display:flex;gap:20px;box-shadow:var(--shadow);
    transition:all 0.3s;
}
.news-item:hover{transform:translateX(5px);box-shadow:var(--shadow-hover)}
.news-item-date{
    flex-shrink:0;text-align:center;
    background:var(--bg-light);border-radius:10px;
    padding:15px 18px;min-width:70px;
}
.news-item-date .day{font-size:1.8rem;font-weight:800;color:var(--primary);display:block;line-height:1}
.news-item-date .month{font-size:0.75rem;color:var(--text-gray);margin-top:4px;display:block}
.news-item-body h4{font-size:1rem;color:var(--text-primary);margin-bottom:8px}
.news-item-body p{font-size:0.85rem;color:var(--text-gray-dark);line-height:1.6}

/* ===== 合作伙伴 ===== */
.partners{background:linear-gradient(180deg,#fff 0%,var(--bg-light-blue) 100%);position:relative}
.partner-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.partner-item{
    background:var(--bg-light);border:1px solid var(--border);
    border-radius:12px;padding:30px;text-align:center;
    font-size:1.1rem;font-weight:600;color:var(--text-gray-dark);
    transition:all 0.3s;cursor:pointer;
}
.partner-item:hover{background:var(--gradient);color:#fff;border-color:var(--primary);transform:translateY(-5px);box-shadow:0 8px 25px rgba(255,107,0,0.35)}
.partner-item:nth-child(1):hover{background:var(--gradient)}
.partner-item:nth-child(2):hover{background:var(--gradient-blue)}
.partner-item:nth-child(3):hover{background:var(--gradient-purple)}
.partner-item:nth-child(4):hover{background:var(--gradient-teal)}
.partner-item:nth-child(5):hover{background:var(--gradient-warm)}
.partner-item:nth-child(6):hover{background:linear-gradient(135deg,#d97706,#f59e0b)}
.partner-item:nth-child(7):hover{background:linear-gradient(135deg,#0891b2,#06b6d4)}
.partner-item:nth-child(8):hover{background:linear-gradient(135deg,#4f46e5,#6366f1)}

/* ===== 联系我们 ===== */
.contact{background:linear-gradient(180deg,var(--bg-light) 0%,#fff 100%)}
.contact-grid{display:grid;grid-template-columns:1fr 1.3fr;gap:40px;align-items:start}
.contact-info{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.contact-card{
    background:#fff;border-radius:14px;padding:28px 20px;
    text-align:center;box-shadow:var(--shadow);
    transition:all 0.3s;border:1px solid var(--border);
}
.contact-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover);border-color:var(--primary)}
.contact-card-icon{
    width:55px;height:55px;background:var(--gradient);
    border-radius:50%;display:flex;align-items:center;justify-content:center;
    margin:0 auto 15px;box-shadow:0 4px 12px rgba(255,107,0,0.3);
}
.contact-card:nth-child(1) .contact-card-icon{background:var(--gradient)}
.contact-card:nth-child(2) .contact-card-icon{background:var(--gradient-blue)}
.contact-card:nth-child(3) .contact-card-icon{background:var(--gradient-warm)}
.contact-card:nth-child(4) .contact-card-icon{background:var(--gradient-purple)}
.contact-card-icon i{color:#fff;font-size:1.3rem}
.contact-card h4{font-size:1rem;color:var(--text-primary);margin-bottom:8px}
.contact-card p{font-size:0.85rem;color:var(--text-gray-dark);line-height:1.6}
.contact-card p a{color:var(--primary);font-weight:600;transition:color 0.3s}
.contact-card p a:hover{color:var(--primary-dark)}
.contact-form-wrapper{
    background:#fff;border-radius:16px;padding:35px;
    box-shadow:var(--shadow);
}
.contact-form-wrapper h3{font-size:1.5rem;color:var(--text-primary);margin-bottom:8px}
.form-desc{color:var(--text-gray-dark);font-size:0.9rem;margin-bottom:25px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:15px}
.form-group{margin-bottom:18px}
.form-group label{display:block;margin-bottom:6px;font-size:0.85rem;color:var(--text-primary);font-weight:500}
.form-group input,.form-group select,.form-group textarea{
    width:100%;padding:11px 15px;
    border:1px solid var(--border);border-radius:8px;
    font-size:0.9rem;font-family:inherit;
    transition:all 0.3s;background:var(--bg-light);
}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{
    outline:none;border-color:var(--primary);background:#fff;
    box-shadow:0 0 0 3px rgba(255,107,0,0.1);
    box-shadow:0 0 0 3px rgba(255,107,0,0.1);
}
.form-group textarea{resize:vertical}
.form-group select{cursor:pointer}
.form-group select option{color:var(--text-primary)}
.contact-form .btn-primary{margin-top:10px}

/* ===== 页脚 ===== */
.footer{background:var(--gradient-dark);color:#a0aabf;padding:60px 0 0;position:relative}
.footer::before{
    content:'';position:absolute;top:0;left:0;width:100%;height:2px;
    background:linear-gradient(90deg,var(--primary),var(--accent),var(--accent-purple),var(--accent-teal));
}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.5fr;gap:40px;margin-bottom:40px}
.footer-logo{display:flex;align-items:center;gap:12px;margin-bottom:20px}
.footer-logo .logo-img{max-height:55px;max-width:160px;width:auto;height:auto;object-fit:contain;background:#fff;padding:4px 8px;border-radius:8px}
.footer-logo .logo-icon{width:40px;height:40px}
.footer-logo span{font-size:1.3rem;font-weight:800;color:#fff}
.footer-col p{font-size:0.9rem;line-height:1.7;margin-bottom:20px}
.social-links{display:flex;gap:12px}
.social-links a{
    width:38px;height:38px;background:rgba(255,255,255,0.08);
    border-radius:50%;display:flex;align-items:center;justify-content:center;
    color:#a0aabf;transition:all 0.3s;
}
.social-links a:hover{background:var(--primary);color:#fff;transform:translateY(-3px)}
.footer-col h4{color:#fff;font-size:1.05rem;margin-bottom:20px;position:relative;padding-bottom:10px}
.footer-col h4::after{content:'';position:absolute;bottom:0;left:0;width:30px;height:2px;background:var(--primary)}
.footer-col ul{list-style:none}
.footer-col ul li{margin-bottom:12px;font-size:0.9rem}
.footer-col ul li a{color:#a0aabf;transition:color 0.3s}
.footer-col ul li a:hover{color:var(--primary)}
.footer-col ul li i{color:var(--primary);margin-right:8px;font-size:0.85rem}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.08);padding:20px 0;text-align:center}
.footer-bottom p{font-size:0.85rem;color:#707a8f}

/* ===== 返回顶部 ===== */
.back-to-top{
    position:fixed;bottom:30px;right:30px;
    width:48px;height:48px;background:var(--gradient-warm);
    border-radius:50%;display:flex;align-items:center;justify-content:center;
    color:#fff;font-size:1.2rem;cursor:pointer;
    box-shadow:0 6px 20px rgba(255,107,0,0.4);
    opacity:0;visibility:hidden;transition:all 0.3s;z-index:999;
}
.back-to-top.show{opacity:1;visibility:visible}
.back-to-top:hover{transform:translateY(-3px)}

/* ===== 响应式 ===== */
@media(max-width:1024px){
    .about-grid,.contact-grid,.news-grid{grid-template-columns:1fr}
    .product-categories{grid-template-columns:repeat(2,1fr)}
    .product-grid{grid-template-columns:repeat(3,1fr)}
    .case-grid{grid-template-columns:repeat(2,1fr)}
    .partner-grid{grid-template-columns:repeat(2,1fr)}
    .footer-grid{grid-template-columns:1fr 1fr}
    .hero-stats{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
    .nav-menu,.nav-cta{display:none}
    .hamburger{display:flex}
    .top-bar-right{display:none}
    .top-bar .container{justify-content:center}
    .hero-title{font-size:2rem}
    .hero-line2{font-size:1.4rem}
    .hero-stats{grid-template-columns:1fr}
    .product-categories,.product-grid,.case-grid,.partner-grid{grid-template-columns:1fr}
    .contact-info{grid-template-columns:1fr}
    .form-row{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:1fr}
    .about-features{grid-template-columns:1fr}
    .section-title{font-size:1.7rem}
    section{padding:50px 0}
    .logo-img{max-height:40px;max-width:140px}
    .nav-menu.active{
        display:flex;flex-direction:column;position:absolute;
        top:100%;left:0;width:100%;background:#fff;
        padding:20px;gap:5px;box-shadow:0 4px 20px rgba(0,0,0,0.1);
    }
}
@media(max-width:480px){
    .hero-buttons{flex-direction:column;align-items:stretch}
    .hero-buttons .btn{justify-content:center}
    .news-item{flex-direction:column}
}

/* ===== 企业文化 ===== */
.culture{padding:80px 0;background:linear-gradient(180deg,var(--bg-light-blue) 0%,#fff 50%,var(--bg-light-warm) 100%);position:relative}
.culture-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:25px}
.culture-card{
    background:#fff;border-radius:16px;padding:35px 25px;
    text-align:center;transition:all 0.35s;
    box-shadow:var(--shadow);position:relative;overflow:hidden;
    border:1px solid var(--border-light);
}
.culture-card::before{
    content:'';position:absolute;top:0;left:0;width:100%;height:3px;
    background:var(--gradient);transform:scaleX(0);transition:transform 0.35s;
}
.culture-card:nth-child(1)::before{background:var(--gradient)}
.culture-card:nth-child(2)::before{background:var(--gradient-blue)}
.culture-card:nth-child(3)::before{background:var(--gradient-purple)}
.culture-card:nth-child(4)::before{background:var(--gradient-teal)}
.culture-card:hover::before{transform:scaleX(1)}
.culture-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-hover)}
.culture-icon{
    width:70px;height:70px;border-radius:50%;
    background:linear-gradient(135deg,rgba(255,107,0,0.1),rgba(0,168,255,0.1));
    display:flex;align-items:center;justify-content:center;
    margin:0 auto 18px;transition:all 0.35s;
}
.culture-card:nth-child(1) .culture-icon{background:linear-gradient(135deg,rgba(255,107,0,0.12),rgba(255,149,0,0.08))}
.culture-card:nth-child(2) .culture-icon{background:linear-gradient(135deg,rgba(0,102,204,0.12),rgba(0,168,255,0.08))}
.culture-card:nth-child(3) .culture-icon{background:linear-gradient(135deg,rgba(124,58,237,0.12),rgba(167,139,250,0.08))}
.culture-card:nth-child(4) .culture-icon{background:linear-gradient(135deg,rgba(13,148,136,0.12),rgba(45,212,191,0.08))}
.culture-card:nth-child(1):hover .culture-icon{background:var(--gradient)}
.culture-card:nth-child(2):hover .culture-icon{background:var(--gradient-blue)}
.culture-card:nth-child(3):hover .culture-icon{background:var(--gradient-purple)}
.culture-card:nth-child(4):hover .culture-icon{background:var(--gradient-teal)}
.culture-icon i{font-size:1.8rem;color:var(--primary);transition:color 0.35s}
.culture-card:nth-child(1) .culture-icon i{color:var(--primary)}
.culture-card:nth-child(2) .culture-icon i{color:var(--secondary)}
.culture-card:nth-child(3) .culture-icon i{color:var(--accent-purple)}
.culture-card:nth-child(4) .culture-icon i{color:var(--accent-teal)}
.culture-card:hover .culture-icon i{color:#fff}
.culture-card h3{font-size:1.1rem;color:var(--text-primary);margin-bottom:10px}
.culture-card p{font-size:0.85rem;color:var(--text-gray-dark);line-height:1.7}

/* ===== 发展历程 ===== */
.history{padding:80px 0;background:linear-gradient(180deg,#fff 0%,var(--bg-light) 50%,#fff 100%)}
.timeline{
    position:relative;max-width:900px;margin:0 auto;
    padding:20px 0;
}
.timeline::before{
    content:'';position:absolute;left:50%;top:0;bottom:0;
    width:2px;background:linear-gradient(to bottom,transparent,var(--accent-purple),var(--secondary),var(--accent-teal),var(--primary),transparent);
    transform:translateX(-50%);
}
.timeline-item{
    display:flex;align-items:flex-start;margin-bottom:40px;
    position:relative;
}
.timeline-item:nth-child(odd){flex-direction:row-reverse}
.timeline-dot{
    width:16px;height:16px;background:var(--gradient);
    border-radius:50%;position:absolute;left:50%;top:6px;
    transform:translateX(-50%);z-index:2;
    box-shadow:0 0 0 4px rgba(255,107,0,0.2);
}
.timeline-item:nth-child(1) .timeline-dot{background:var(--gradient)}
.timeline-item:nth-child(2) .timeline-dot{background:var(--gradient-blue)}
.timeline-item:nth-child(3) .timeline-dot{background:var(--gradient-purple)}
.timeline-item:nth-child(4) .timeline-dot{background:var(--gradient-teal)}
.timeline-item:nth-child(5) .timeline-dot{background:linear-gradient(135deg,#d97706,#f59e0b)}
.timeline-item:nth-child(6) .timeline-dot{background:var(--gradient-warm)}
.timeline-content{
    width:42%;background:var(--bg-light);border-radius:12px;
    padding:22px 25px;box-shadow:var(--shadow);
    transition:all 0.3s;
}
.timeline-content:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.timeline-year{
    display:inline-block;background:var(--gradient);
    color:#fff;padding:3px 14px;border-radius:20px;
    font-size:0.8rem;font-weight:700;margin-bottom:8px;
}
.timeline-content h4{font-size:1rem;color:var(--text-primary);margin-bottom:6px}
.timeline-content p{font-size:0.82rem;color:var(--text-gray-dark);line-height:1.6}

@media(max-width:768px){
    .culture-grid{grid-template-columns:1fr}
    .timeline::before{left:20px}
    .timeline-dot{left:20px}
    .timeline-item,.timeline-item:nth-child(odd){flex-direction:row}
    .timeline-content{width:calc(100% - 55px);margin-left:55px}
}