/* =========================================================
   GreenFuture 主题 - 首页板块样式
   Hero / 公司概览 / 主分类 / 畅销产品 / 应用场景
   为什么选择 / 全球地图 / 展会画廊
   仅首页（front/index.html）引用
   ========================================================= */

/* ===== Hero 轮播（纯横幅图：无蒙层，1920:649 等比完整展示，淡入淡出自动轮播） ===== */
.hero {
    position: relative; overflow: hidden;
    aspect-ratio: 1920 / 649; max-height: 650px;
    background: var(--bg);
}
.hero-slide { position: absolute; inset: 0; opacity: 0; transition: opacity 1s ease; }
.hero-slide.active { opacity: 1; }
.hero-slide img { width: 100%; height: 100%; object-fit: cover; }
.hero-nav {
    position: absolute; bottom: 24px; left: 50%; transform: translateX(-50%);
    display: flex; gap: 12px; z-index: 3;
}
.hero-nav span {
    width: 40px; height: 4px; border-radius: 2px; cursor: pointer;
    background: rgba(15,23,42,0.25); transition: var(--transition);
}
.hero-nav span.active { background: linear-gradient(90deg, var(--primary), var(--accent)); width: 60px; }

/* ===== 公司概览 ===== */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.about-text h3 { font-size: 32px; font-weight: 800; color: var(--secondary); margin-bottom: 20px; line-height: 1.3; }
.about-text p { color: var(--text-muted); margin-bottom: 16px; font-size: 15px; line-height: 1.8; }
.about-stats { display: flex; gap: 40px; margin-top: 32px; }
.stat-item h4 { font-size: 32px; font-weight: 800; background: linear-gradient(135deg, var(--primary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.stat-item span { font-size: 13px; color: var(--text-muted); }
.about-media { position: relative; }
.factory-slider { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-lg); position: relative; aspect-ratio: 4/3; }
.factory-slider img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity 0.6s; }
.factory-slider img.active { opacity: 1; }
.factory-nav { position: absolute; bottom: 16px; left: 50%; transform: translateX(-50%); display: flex; gap: 8px; z-index: 2; }
.factory-nav span { width: 8px; height: 8px; border-radius: 50%; background: rgba(255,255,255,0.5); cursor: pointer; }
.factory-nav span.active { background: var(--accent); }
.about-badge {
    position: absolute; top: -16px; left: -16px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff; padding: 12px 20px; border-radius: var(--radius-sm); font-size: 13px; font-weight: 700;
    box-shadow: var(--shadow); z-index: 3;
}

/* ===== 主分类 ===== */
.category-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.category-card {
    background: var(--surface); border-radius: var(--radius); overflow: hidden;
    border: 1px solid var(--border); transition: var(--transition); cursor: pointer;
}
.category-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--primary-light); }
.category-card .img-wrap { height: 200px; overflow: hidden; position: relative; }
.category-card .img-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s; }
.category-card:hover .img-wrap img { transform: scale(1.08); }
.category-card .info { padding: 24px; }
.category-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.category-card p { font-size: 14px; color: var(--text-muted); }
.category-card .arrow { display: inline-flex; align-items: center; gap: 6px; margin-top: 12px; font-size: 13px; font-weight: 700; color: var(--primary); }

/* ===== 畅销产品（产品卡片样式为公共样式，见 gf/base.css） ===== */

/* ===== 应用场景 ===== */
.app-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.app-item { position: relative; border-radius: var(--radius); overflow: hidden; aspect-ratio: 1; cursor: pointer; }
.app-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s; }
.app-item:hover img { transform: scale(1.1); }
.app-item .overlay {
    position: absolute; inset: 0;
    background: linear-gradient(transparent 30%, rgba(6,182,212,0.85));
    display: flex; flex-direction: column; justify-content: flex-end;
    padding: 20px; color: #fff; opacity: 0; transition: var(--transition);
}
.app-item:hover .overlay { opacity: 1; }
.app-item h4 { font-size: 16px; font-weight: 700; margin-bottom: 4px; }
.app-item p { font-size: 12px; opacity: 0.9; }

/* ===== 为什么选择 ===== */
.why-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; }
.why-card {
    background: var(--surface); border-radius: var(--radius); padding: 36px 28px;
    border: 1px solid var(--border); transition: var(--transition); position: relative; overflow: hidden;
}
.why-card::before {
    content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent)); transform: scaleX(0); transition: transform 0.4s; transform-origin: left;
}
.why-card:hover::before { transform: scaleX(1); }
.why-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.why-icon {
    width: 56px; height: 56px; border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-light), #D1FAE5);
    display: flex; align-items: center; justify-content: center;
    font-size: 24px; margin-bottom: 20px; color: var(--primary);
}
.why-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.why-card p { font-size: 14px; color: var(--text-muted); line-height: 1.7; }

/* ===== 全球地图 ===== */
.map-section { background: var(--secondary); color: #fff; position: relative; overflow: hidden; }
.map-section::before {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(circle at 70% 50%, rgba(6,182,212,0.08) 0%, transparent 60%);
}
.map-section .section-header h2, .map-section .section-header p { color: #fff; }
.map-container { position: relative; max-width: 900px; margin: 0 auto; aspect-ratio: 16/9; }
.map-svg { width: 100%; height: 100%; }
.map-dot { fill: var(--accent); animation: pulse 2s infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; r: 4; } 50% { opacity: 0.5; r: 7; } }
.map-labels { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 40px; }
.map-label {
    background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-sm); padding: 16px 20px; display: flex; align-items: center; gap: 12px;
}
.map-label .dot { width: 10px; height: 10px; border-radius: 50%; background: linear-gradient(135deg, var(--primary), var(--accent)); }
.map-label span { font-size: 14px; font-weight: 600; }
.map-label small { font-size: 12px; color: #94A3B8; margin-left: auto; }

/* ===== 展会画廊 ===== */
.gallery-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.gallery-item { border-radius: var(--radius); overflow: hidden; position: relative; aspect-ratio: 4/3; }
.gallery-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.gallery-item:hover img { transform: scale(1.08); }
.gallery-item .caption {
    position: absolute; bottom: 0; left: 0; right: 0; padding: 30px 16px 16px;
    background: linear-gradient(transparent, rgba(0,0,0,0.7)); color: #fff;
    font-size: 13px; font-weight: 600; opacity: 0; transition: var(--transition);
}
.gallery-item:hover .caption { opacity: 1; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .about-grid { grid-template-columns: 1fr; }
    .app-grid { grid-template-columns: repeat(2, 1fr); }
    .gallery-grid { grid-template-columns: repeat(2, 1fr); }
    .map-labels { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .hero-nav { bottom: 12px; }
    .hero-nav span { width: 28px; }
    .hero-nav span.active { width: 40px; }
    .app-grid { grid-template-columns: 1fr 1fr; }
    .gallery-grid { grid-template-columns: 1fr 1fr; }
    .map-labels { grid-template-columns: 1fr; }
}