/* ===== 长歌网络营销站 全站样式 ===== */
:root {
  --red: #e63e2e; --red-dark: #c93225; --dark: #1d2229; --gray: #667;
  --line: #e7e9ee; --bg: #fff; --bg-gray: #f5f6f8; --radius: 8px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif; color: var(--dark); background: var(--bg); line-height: 1.7; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 16px; }
.muted { color: var(--gray); }

/* 顶栏 / 导航 */
.topbar { background: var(--dark); color: #cfd6e4; font-size: 13px; }
.topbar-in { display: flex; justify-content: space-between; padding: 5px 16px; }
.topbar-tel a { color: #ffd766; }
.navbar { position: sticky; top: 0; z-index: 50; background: #fff; border-bottom: 1px solid var(--line); }
.navbar-in { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; padding: 10px 16px; }
.logo { font-size: 20px; font-weight: 700; color: var(--red); }
.logo em { display: block; font-style: normal; font-size: 11px; font-weight: 400; color: var(--gray); letter-spacing: 2px; }
.nav { display: flex; flex-wrap: wrap; gap: 2px; }
.nav a { padding: 6px 10px; font-size: 14px; border-radius: 4px; color: #333; }
.nav a:hover, .nav a.on { color: var(--red); background: #fdf1ef; }
.nav-toggle { display: none; font-size: 22px; background: none; border: 0; cursor: pointer; }

/* Hero */
.hero { background: linear-gradient(135deg, #232b3a 0%, #3a2430 55%, var(--red-dark) 100%); color: #fff; padding: 56px 0 46px; }
.hero h1 { font-size: 32px; margin-bottom: 10px; }
.hero-sub { font-size: 15px; color: #f0d9d5; margin-bottom: 22px; }
.hero-btns { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 18px; }
.hero-tags { display: flex; gap: 18px; flex-wrap: wrap; list-style: none; font-size: 13px; color: #ffe9e6; }

/* 按钮 */
.btn { display: inline-block; padding: 11px 26px; border-radius: 6px; font-size: 15px; border: 1px solid transparent; cursor: pointer; }
.btn-red { background: var(--red); color: #fff; }
.btn-red:hover { background: var(--red-dark); }
.btn-line { border-color: #fff; color: #fff; }
.hero .btn-line:hover { background: rgba(255,255,255,.12); }
.btn-white { background: #fff; color: var(--red); }
.btn-sm { padding: 8px 18px; font-size: 13px; }

/* 区块 */
.sec { padding: 48px 0; }
.sec-gray { background: var(--bg-gray); }
.sec-title { font-size: 24px; text-align: center; margin-bottom: 30px; }
.sec-more { font-size: 13px; color: var(--red); font-weight: 400; }
.sec-narrow { padding: 32px 0 56px; }
.wrap-article { max-width: 860px; }
.page-h1 { font-size: 26px; margin-bottom: 16px; }

/* 服务卡片 */
.svc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.svc-grid-full { grid-template-columns: repeat(3, 1fr); }
.svc-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; transition: .2s; }
.svc-card:hover { box-shadow: 0 6px 20px rgba(0,0,0,.08); transform: translateY(-2px); border-color: #f3c5bf; }
.svc-card h3 { font-size: 17px; color: var(--red); margin-bottom: 8px; }
.svc-card p { font-size: 13px; color: var(--gray); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.svc-more { display: inline-block; margin-top: 10px; font-size: 13px; color: var(--red); }

/* 优势 */
.why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.why-item { background: #fff; border-radius: var(--radius); padding: 20px; border-top: 3px solid var(--red); box-shadow: 0 2px 12px rgba(0,0,0,.05); }
.why-item b { display: block; margin-bottom: 6px; }
.why-item p { font-size: 13px; color: var(--gray); }

/* 首页资讯卡 */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; list-style: none; }
.news-card { border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; background: #fff; }
.news-card h3 { font-size: 15px; margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-card h3:hover { color: var(--red); }
.news-card p { font-size: 12px; color: var(--gray); -webkit-line-clamp: 2; display: -webkit-box; -webkit-box-orient: vertical; overflow: hidden; }
.news-date { font-size: 12px; color: #aab; }

/* CTA 条 */
.cta-band { background: var(--red); color: #fff; padding: 34px 0; }
.cta-in { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.cta-in h2 { font-size: 22px; }

/* 面包屑 */
.crumb { font-size: 13px; color: var(--gray); padding: 12px 16px 0; }
.crumb .sep { margin: 0 6px; color: #bbc; }
.crumb a:hover { color: var(--red); }

/* 文章正文 */
.article h2 { font-size: 19px; margin: 22px 0 8px; padding-left: 10px; border-left: 4px solid var(--red); }
.article h3 { font-size: 16px; margin: 16px 0 6px; }
.article p { margin-bottom: 12px; color: #333; }
.article ul, .article ol { margin: 0 0 14px 22px; }
.article li { margin-bottom: 4px; }
.svc-cta-inline { display: flex; gap: 10px; margin-bottom: 20px; }
.svc-cta-inline .btn-line { border-color: var(--red); color: var(--red); }
.kw-chips { margin-top: 18px; font-size: 12px; color: var(--gray); }
.kw-chips span { display: inline-block; background: var(--bg-gray); border-radius: 4px; padding: 2px 8px; margin: 2px; }

/* 相关推荐 / 其他服务 */
.rel-box, .other-svc, .svc-banner { margin-top: 32px; border-top: 1px solid var(--line); padding-top: 18px; }
.rel-box h2, .other-svc h2 { font-size: 17px; margin-bottom: 10px; }
.rel-list { list-style: none; }
.rel-list li { padding: 6px 0; border-bottom: 1px dashed var(--line); font-size: 14px; }
.rel-list li a:hover { color: var(--red); }
.rel-more { font-size: 13px; color: var(--red); }
.chip-list { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { font-size: 13px; border: 1px solid var(--line); border-radius: 20px; padding: 4px 14px; }
.chip:hover { border-color: var(--red); color: var(--red); }
.svc-banner { display: flex; align-items: center; justify-content: space-between; gap: 14px; flex-wrap: wrap; background: var(--bg-gray); border-radius: var(--radius); padding: 16px 20px; }

/* 资讯列表 */
.biz-filter { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.biz-filter a { font-size: 13px; padding: 4px 14px; border-radius: 20px; border: 1px solid var(--line); }
.biz-filter a.on, .biz-filter a:hover { background: var(--red); color: #fff; border-color: var(--red); }
.news-list { list-style: none; }
.news-item { display: flex; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.news-item-main { flex: 1; }
.news-item h2 { font-size: 17px; margin-bottom: 6px; }
.news-item h2:hover { color: var(--red); }
.news-item p { font-size: 13px; color: var(--gray); }
.news-meta { font-size: 12px; color: #aab; }
.news-cover img { width: 140px; height: 92px; object-fit: cover; border-radius: 6px; }
.empty { padding: 40px 0; text-align: center; color: var(--gray); }
.pager { margin-top: 24px; text-align: center; font-size: 14px; }
.pager a, .pager span { display: inline-block; padding: 6px 14px; margin: 0 4px; border: 1px solid var(--line); border-radius: 4px; }
.pager a:hover { border-color: var(--red); color: var(--red); }
.pager .dis { color: #bbc; }
.article-meta { margin-bottom: 18px; font-size: 13px; }

/* 联系页 */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 28px; }
.contact-info ul { list-style: none; }
.contact-info li { padding: 10px 0; border-bottom: 1px dashed var(--line); display: flex; gap: 12px; font-size: 14px; }
.contact-info b { min-width: 72px; color: var(--gray); font-weight: 400; }
.contact-info a:hover { color: var(--red); }
.qr-img { width: 140px; margin-top: 14px; }
.contact-form { background: var(--bg-gray); border-radius: var(--radius); padding: 22px; }
.contact-form h2 { font-size: 17px; margin-bottom: 14px; }
.contact-form label { display: block; font-size: 13px; margin-bottom: 12px; color: var(--gray); }
.contact-form input, .contact-form select, .contact-form textarea { width: 100%; margin-top: 4px; padding: 9px 12px; border: 1px solid var(--line); border-radius: 5px; font-size: 14px; font-family: inherit; background: #fff; }
.contact-form input:focus, .contact-form textarea:focus, .contact-form select:focus { outline: none; border-color: var(--red); }
.form-tip { font-size: 13px; margin-top: 10px; }
.form-tip.ok { color: #1a9b4d; } .form-tip.err { color: var(--red); }

/* 悬浮客服 */
.float-kefu { position: fixed; right: 14px; bottom: 90px; z-index: 60; display: flex; flex-direction: column; gap: 6px; }
.fk { position: relative; width: 58px; background: #fff; border: 1px solid var(--line); border-radius: 8px; text-align: center; padding: 8px 4px; box-shadow: 0 2px 10px rgba(0,0,0,.1); font-size: 11px; color: #444; }
.fk:hover { background: var(--red); color: #fff; border-color: var(--red); }
.fk-ico { display: block; font-size: 20px; }
.fk-txt { line-height: 1.2; }
.fk-pop { display: none; position: absolute; right: 66px; top: 50%; transform: translateY(-50%); background: #fff; color: #333; border: 1px solid var(--line); border-radius: 6px; padding: 8px 12px; font-size: 13px; white-space: nowrap; box-shadow: 0 4px 14px rgba(0,0,0,.12); }
.fk:hover .fk-pop { display: block; }
.fk-pop-wx img { display: block; width: 120px; margin-bottom: 4px; }

/* 页脚 */
.footer { background: var(--dark); color: #b8c0cd; font-size: 13px; margin-top: 20px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 30px; padding: 40px 16px 26px; }
.footer h4 { color: #fff; margin-bottom: 12px; }
.footer ul { list-style: none; }
.footer li { padding: 3px 0; }
.footer a:hover { color: #fff; }
.footer-links { columns: 2; }
.footer-btm { display: flex; justify-content: space-between; border-top: 1px solid #2c333e; padding: 14px 16px; font-size: 12px; color: #7c8698; flex-wrap: wrap; gap: 6px; }

/* 响应式 */
@media (max-width: 860px) {
  .svc-grid, .news-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid, .footer-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 24px; }
  .nav { display: none; width: 100%; flex-direction: column; }
  .nav.open { display: flex; }
  .nav-toggle { display: block; }
}
@media (max-width: 560px) {
  .svc-grid, .news-grid, .why-grid { grid-template-columns: 1fr; }
  .footer-links { columns: 1; }
}