/* =========================================================
   menhu.css · 行业门户网站建设
   布局特征：频道六宫格 + 左图右文内嵌列表 + 字母徽章三卡 + FAQ
   ========================================================= */

.banner-news{background-image:url('../images/banner-news.jpg')}
.mh-ice{background:var(--c-ice-2)}

/* ---------- 频道六宫格 ---------- */
.mh-ch-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.mh-ch-card{
  background:#fff;border:1px solid var(--c-line);border-radius:14px;padding:28px 26px;transition:all var(--trans);
}
.mh-ch-card:hover{border-top:4px solid var(--c-accent);box-shadow:var(--shadow);transform:translateY(-5px)}
.mh-ch-card h3{font-size:17.5px;margin-bottom:8px}
.mh-ch-card p{font-size:14px;color:var(--c-text-2);line-height:1.8}

/* ---------- 左图右文 ---------- */
.mh-plat-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:56px;align-items:center}
.mh-plat-media img{border-radius:var(--radius-lg);box-shadow:var(--shadow-lg)}
.mh-plat-text h2{font-size:clamp(24px,3vw,32px);margin-bottom:18px}
.mh-plat-text>p{color:var(--c-text-2);margin-bottom:20px}
.mh-plat-list{display:grid;gap:16px}
.mh-plat-item{
  background:#fff;border-radius:12px;padding:16px 20px;box-shadow:var(--shadow);display:flex;gap:16px;align-items:baseline;
}
.mh-plat-item b{flex-shrink:0;color:var(--c-accent);font-size:15.5px;background:var(--c-ice);padding:4px 12px;border-radius:8px}
.mh-plat-item p{font-size:14px;color:var(--c-text-2)}

/* ---------- 字母徽章三卡 ---------- */
.mh-biz-row{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.mh-biz-card{
  background:#fff;border-radius:var(--radius-lg);padding:34px 28px;box-shadow:var(--shadow);position:relative;overflow:hidden;transition:all var(--trans);
}
.mh-biz-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.mh-biz-no{
  position:absolute;right:-10px;top:-24px;font-size:96px;font-weight:800;color:var(--c-ice);line-height:1;
}
.mh-biz-card h3{font-size:19px;margin-bottom:10px}
.mh-biz-card p{font-size:14.5px;color:var(--c-text-2);position:relative;z-index:1}

/* ---------- FAQ ---------- */
.mh-faq-list{max-width:860px;margin:0 auto;display:grid;gap:14px}
.mh-faq-item{background:#fff;border:1px solid var(--c-line);border-radius:14px;padding:20px 26px;transition:all var(--trans)}
.mh-faq-item[open]{border-color:var(--c-accent);box-shadow:var(--shadow)}
.mh-faq-item summary{cursor:pointer;font-weight:700;font-size:16.5px;color:var(--c-primary);list-style:none;display:flex;justify-content:space-between;align-items:center;gap:14px}
.mh-faq-item summary::-webkit-details-marker{display:none}
.mh-faq-item summary::after{content:"+";font-size:22px;color:var(--c-accent);flex-shrink:0;transition:transform .3s}
.mh-faq-item[open] summary::after{transform:rotate(45deg)}
.mh-faq-item p{margin-top:14px;font-size:15px;color:var(--c-text-2);line-height:1.9}

/* ---------- 互链 ---------- */
.mh-relate-row{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.mh-relate-card{background:#fff;border:1px solid var(--c-line);border-radius:14px;padding:24px 26px;display:block;transition:all var(--trans)}
.mh-relate-card:hover{background:var(--c-grad);border-color:transparent}
.mh-relate-card:hover h3{color:#fff}
.mh-relate-card:hover p{color:#D6E2F6}
.mh-relate-card h3{font-size:17px;margin-bottom:8px;transition:color var(--trans)}
.mh-relate-card p{font-size:14px;color:var(--c-text-2);transition:color var(--trans)}

.contact-sec{padding-top:0}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .mh-ch-grid{grid-template-columns:1fr 1fr}
  .mh-plat-grid{grid-template-columns:1fr;gap:36px}
  .mh-biz-row{grid-template-columns:1fr;max-width:520px;margin:0 auto}
}
@media (max-width:768px){
  .mh-ch-grid{grid-template-columns:1fr}
  .mh-relate-row{grid-template-columns:1fr}
}