/* --- 1. Variables --- */
:root {
    --primary: #10b981;      /* 生态绿 */
    --secondary: #0ea5e9;    /* 天空蓝 */
    --dark: #064e3b;         /* 深绿 */
    --text: #374151;
    --light: #f0fdf4;
    --white: #ffffff;
    
    --shadow: 0 10px 30px -5px rgba(16, 185, 129, 0.15);
    --radius: 20px;
    
    --font-main: 'Roboto', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: var(--font-main); color: var(--text); background: #fff; line-height: 1.6; }
a { text-decoration: none; color: inherit; transition: 0.3s; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 100px 0; }
.center { text-align: center; }

/* Typography */
h1, h2, h3, h4 { color: var(--dark); font-weight: 700; }
.sec-header { margin-bottom: 60px; }
.sec-header h2 { font-size: 36px; margin-bottom: 15px; }
.sec-header p { font-size: 16px; color: #6b7280; }

/* Buttons */
.btn-primary {
    display: inline-block; background: var(--primary); color: #fff;
    padding: 12px 32px; border-radius: 50px; font-weight: 500;
    box-shadow: 0 5px 15px rgba(16, 185, 129, 0.3);
}
.btn-primary:hover { transform: translateY(-3px); background: #059669; }

.btn-soft {
    display: inline-block; background: #fff; color: var(--primary);
    padding: 12px 32px; border-radius: 50px; font-weight: 500;
}
.btn-soft:hover { background: var(--light); }

.btn-login {
    color: var(--primary); font-weight: 500; padding: 8px 20px; 
    border: 1px solid var(--primary); border-radius: 50px;
}
.btn-login:hover { background: var(--primary); color: #fff; }

.btn-block-more {
    display: block; width: 100%; text-align: center; padding: 12px 0;
    background: var(--light); color: var(--primary); border-radius: 12px;
    font-weight: 500; margin-top: 20px; font-size: 14px;
}
.btn-block-more:hover { background: #dcfce7; }

/* --- 2. Navbar --- */
#navbar {
    position: fixed; top: 0; width: 100%; height: 80px; z-index: 1000;
    background: rgba(255, 255, 255, 0.9); backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0,0,0,0.05);
}
.nav-box { display: flex; justify-content: space-between; align-items: center; height: 100%; }

.logo { display: flex; align-items: center; gap: 8px; font-size: 20px; font-weight: 700; color: var(--primary); }
.logo i { font-size: 24px; }

.nav-links { display: flex; gap: 40px; }
.nav-links a { font-weight: 500; color: var(--text); }
.nav-links a:hover, .nav-links a.active { color: var(--primary); }

.nav-btn { display: flex; align-items: center; gap: 15px; }
.menu-toggle { display: none; font-size: 24px; cursor: pointer; }

/* --- 3. Hero --- */
.hero { position: relative; height: 80vh; min-height: 600px; display: flex; align-items: center; overflow: hidden; }
.hero-bg {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: url('/assets/enterprise/3/img/1.jpeg') center/cover;
    z-index: -2;
}
.hero-bg::after {
    content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(90deg, #f0fdf4 0%, rgba(240, 253, 244, 0.8) 50%, rgba(240, 253, 244, 0) 100%);
    z-index: -1;
}

.hero-content { width: 100%; position: relative; z-index: 1; }
.hero-text { max-width: 600px; }

.badge-eco {
    display: inline-block; background: #d1fae5; color: var(--primary);
    padding: 6px 14px; border-radius: 30px; font-size: 12px; font-weight: 600; margin-bottom: 20px;
}
.hero h1 { font-size: 56px; line-height: 1.1; margin-bottom: 20px; }
.text-green { color: var(--primary); }
.hero p { font-size: 18px; margin-bottom: 40px; color: #4b5563; }
.hero-actions { display: flex; gap: 15px; }

.stats-bar-floating {
    position: absolute; right: 0; bottom: 50px;
    background: rgba(255,255,255,0.8); backdrop-filter: blur(10px);
    padding: 30px; border-radius: 20px; box-shadow: var(--shadow);
    display: flex; gap: 40px;
}
.stat-item { display: flex; align-items: center; gap: 15px; }
.icon-round {
    width: 50px; height: 50px; border-radius: 12px; color: #fff;
    display: flex; align-items: center; justify-content: center; font-size: 20px;
}
.icon-round.green { background: var(--primary); }
.icon-round.blue { background: var(--secondary); }
.icon-round.yellow { background: #f59e0b; }

.stat-item strong { display: block; font-size: 20px; line-height: 1.2; }
.stat-item span { font-size: 13px; color: #6b7280; }

/* --- 4. Business --- */
.biz-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.biz-card {
    background: #fff; border-radius: var(--radius); overflow: hidden;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05); transition: 0.3s;
}
.biz-card:hover { transform: translateY(-10px); box-shadow: var(--shadow); }

.card-img { height: 220px; position: relative; }
.card-img img { width: 100%; height: 100%; object-fit: cover; }
.icon-float {
    position: absolute; bottom: -20px; right: 20px;
    width: 50px; height: 50px; background: #fff; border-radius: 50%;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1); color: var(--primary);
    display: flex; align-items: center; justify-content: center; font-size: 20px;
}

.card-body { padding: 30px; }
.card-body h3 { font-size: 20px; margin-bottom: 10px; }
.card-body p { font-size: 14px; color: #6b7280; margin-bottom: 20px; }
.link-more { font-size: 14px; font-weight: 500; color: var(--primary); }

/* --- 5. ESG --- */
.bg-gradient-light { background: linear-gradient(180deg, #fff 0%, #f0fdf4 100%); }
.esg-wrap { display: flex; align-items: center; gap: 80px; }
.esg-text { flex: 1; }
.sub-title { color: var(--primary); font-weight: 700; font-size: 13px; letter-spacing: 1px; display: block; margin-bottom: 10px; }
.esg-text h2 { font-size: 42px; margin-bottom: 20px; }
.esg-text p { font-size: 16px; color: #4b5563; margin-bottom: 30px; }
.esg-tags span { display: inline-block; background: #fff; padding: 8px 16px; border-radius: 50px; font-size: 14px; font-weight: 500; color: var(--dark); margin-right: 10px; box-shadow: 0 2px 5px rgba(0,0,0,0.05); }

.esg-img { flex: 1; }
.esg-img img { border-radius: 20px; box-shadow: var(--shadow); }

/* --- 6. News --- */
.news-cols-clean { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.news-list-card {
    background: #fff; padding: 30px; border-radius: var(--radius);
    border: 1px solid #f3f4f6; transition: 0.3s;
}
.news-list-card:hover { border-color: var(--primary); box-shadow: var(--shadow); }

.list-head { font-size: 18px; font-weight: 700; color: var(--dark); margin-bottom: 20px; display: flex; align-items: center; gap: 10px; }
.list-head i { color: var(--primary); }

.clean-list li { margin-bottom: 15px; border-bottom: 1px dashed #e5e7eb; padding-bottom: 10px; }
.clean-list li:last-child { border: none; }
.clean-list a { display: block; }
.clean-list .title { display: block; font-size: 15px; font-weight: 500; margin-bottom: 5px; line-height: 1.4; transition: 0.2s; }
.clean-list a:hover .title { color: var(--primary); }
.clean-list .date { font-size: 12px; color: #9ca3af; }

/* --- 7. Footer --- */
footer { background: #fff; padding: 80px 0 30px; border-top: 1px solid #f3f4f6; text-align: center; }
.f-info h3 { color: var(--primary); margin-bottom: 10px; }
.f-info p { font-size: 14px; color: #6b7280; margin-bottom: 30px; }
.f-links { display: flex; justify-content: center; gap: 30px; margin-bottom: 40px; }
.f-links a { font-size: 14px; color: #374151; font-weight: 500; }
.f-links a:hover { color: var(--primary); }
.f-copy { font-size: 12px; color: #9ca3af; }

/* Responsive */
@media (max-width: 992px) {
    .hero { height: auto; padding: 120px 0 60px; }
    .hero-content { text-align: center; }
    .hero-text { margin: 0 auto; }
    .hero-actions { justify-content: center; }
    .stats-bar-floating { position: static; margin-top: 50px; flex-direction: column; width: 100%; gap: 20px; }
    .biz-grid, .news-cols-clean { grid-template-columns: 1fr; }
    .esg-wrap { flex-direction: column; }
    .nav-links, .btn-login { display: none; }
    .menu-toggle { display: block; }
}