* { box-sizing: border-box; margin: 0; padding: 0; }
a { text-decoration: none; transition: var(--transition); color: var(--brand-green); }
a:hover { opacity: 0.8; text-decoration: none;}

/* 主容器 */
.container {
    max-width: 1200px; /* PC端宽屏显示 */
    margin: 0 auto;
    padding: 20px;
}
/* --- 极简标题区 --- */
.page-title-section {
    padding: 60px 0 40px;
    text-align: center;
    background: #fff;
    border-bottom: 1px solid var(--border-soft);
}
.page-title-section h1 { font-size: 32px; font-weight: 800; letter-spacing: 2px; color: var(--text-dark); }
.page-title-section p { color: var(--text-muted); margin-top: 10px; font-size: 16px; }

/* --- 核心数据展板 (带SVG图标) --- */
.stats-section { padding: 40px 0 20px; }
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.stat-card {
    background: white;
    padding: 30px 20px;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.03);
    border: 1px solid var(--border-soft);
    transition: var(--transition);
}
.stat-card:hover { transform: translateY(-5px); border-color: var(--brand-green); }
.stat-icon { width: 44px; height: 44px; margin: 0 auto 15px; color: var(--brand-green); }
.stat-card .num { font-size: 24px; font-weight: 800; color: var(--text-dark); display: block; }
.stat-card .label { font-size: 13px; color: var(--text-muted); margin-top: 5px; font-weight: 600; }

/* --- 商务联系横版卡片 (优化回归样式) --- */
.contact-section { margin-bottom: 40px; }
.contact-bar {
    background: white;
    padding: 30px 40px;
    border-radius: 16px;
    border: 1px solid var(--border-soft);
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 4px 15px rgba(0,0,0,0.02);
}
.contact-title h2 { font-size: 20px; color: var(--brand-orange); margin-bottom: 4px; }
.contact-title p { font-size: 14px; color: var(--text-muted); }

.contact-methods { display: flex; gap: 40px; }
.contact-item { display: flex; flex-direction: column; }
.contact-item span { font-size: 11px; color: var(--text-muted); font-weight: bold; text-transform: uppercase; letter-spacing: 1px; }
.contact-item b { font-size: 15px; color: var(--text-dark); margin-top: 2px; }

/* --- 业务合作网格 --- */
.business-section { padding-bottom: 60px; }
.business-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
}
.biz-card {
    background: white;
    padding: 30px;
    border-radius: 16px;
    border: 1px solid var(--border-soft);
    transition: var(--transition);
}
.biz-card:hover { box-shadow: 0 10px 30px rgba(0,0,0,0.05); border-color: var(--brand-blue); }
.biz-card h3 {
    font-size: 18px;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    color: var(--text-dark);
}
.biz-card h3::before {
    content: "";
    width: 4px;
    height: 18px;
    background: var(--brand-blue);
    margin-right: 12px;
    border-radius: 2px;
}
.biz-card p { font-size: 14px; color: var(--text-muted); line-height: 1.8; text-align: justify; }

/* --- 合作伙伴LOGO墙 --- */
.partner-section { background: white; padding: 60px 0; border-top: 1px solid var(--border-soft); }
.partner-title { text-align: center; margin-bottom: 40px; color: var(--text-muted); font-size: 14px; letter-spacing: 2px; font-weight: bold; }
.logo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 30px;
    align-items: center;
    justify-items: center;
}
.logo-grid img { max-width: 110px; filter: grayscale(1); opacity: 0.6; transition: var(--transition); }
.logo-grid img:hover { filter: grayscale(0); opacity: 1; transform: scale(1.05); }

/* --- 页脚 --- */
footer { padding: 40px 0; text-align: center; color: var(--text-muted); font-size: 13px; }

/* --- 响应式调整 --- */
@media (max-width: 760px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .contact-bar { flex-direction: column; text-align: center; padding: 25px; }
    .contact-methods { flex-direction: column; gap: 15px; margin-top: 20px; }
    .business-grid { grid-template-columns: 1fr; }
}
@media (prefers-color-scheme: dark) {
    :root {
        /* 背景与基础色 */
        --bg-body: #12141a;       /* 极深蓝黑背景 */
        --card-bg: #1c1f26;       /* 卡片背景，比底色稍浅，增加浮现感 */
        --bg-gray: #252932;       /* 搜索框、输入框、表头等次级背景 */

        /* 文字色 */
        --text-dark: #e2e8f0;     /* 主文字：浅灰白 */
        --text-muted: #94a3b8;    /* 辅助文字：中灰蓝 */

        /* 边框与线 */
        --border-soft: #2d333f;   /* 线条：深灰色 */

        /* 品牌色在深色下的微调 */
        --brand-green: #4ade80;   /* 调亮一点的绿色，增加对比 */
        --brand-green-light: rgba(74, 222, 128, 0.15);
        --brand-blue: #60a5fa;
        --brand-orange: #fbbf24;
    }
    .stat-card{ background: var(--card-bg);}
    .contact-bar{ background: var(--card-bg);}
    .biz-card{ background: var(--card-bg);}
    .partner-section{ background: var(--card-bg);}
}