/* 光纤涂覆技术笔记 - 文章页公共样式 */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: "Microsoft YaHei", -apple-system, sans-serif; background: #f5f6f8; color: #1f2937; font-size: 15px; line-height: 1.9; }
.topbar { background: #fff; border-bottom: 1px solid #e8eaee; position: sticky; top: 0; z-index: 50; }
.topbar-inner { max-width: 1080px; margin: 0 auto; padding: 0 20px; display: flex; align-items: center; gap: 26px; height: 60px; }
.site-name { display: flex; align-items: center; gap: 9px; text-decoration: none; }
.site-name .mark { width: 32px; height: 32px; border-radius: 7px; background: linear-gradient(135deg, #0b6cff, #00c8ff); display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 700; }
.site-name b { font-size: 15px; color: #111827; }
.site-name small { font-size: 10px; color: #9ca3af; display: block; }
.nav { display: flex; gap: 16px; font-size: 13.5px; color: #4b5563; }
.nav a { color: inherit; text-decoration: none; }
.nav a:hover, .nav a.on { color: #0b6cff; }
.topbar-right { margin-left: auto; }
.topbar-tel { font-size: 13px; color: #0b6cff; font-weight: 700; text-decoration: none; }
.topbar-tel b { font-size: 15px; }

.main { max-width: 1080px; margin: 24px auto; padding: 0 20px; display: flex; gap: 24px; align-items: flex-start; }
.article { flex: 1; min-width: 0; background: #fff; border: 1px solid #e8eaee; border-radius: 12px; padding: 34px 38px; }
.sidebar { width: 300px; flex-shrink: 0; display: flex; flex-direction: column; gap: 16px; }
.card { background: #fff; border: 1px solid #e8eaee; border-radius: 10px; }

.crumb { font-size: 12px; color: #9ca3af; margin-bottom: 14px; }
.crumb a { color: #6b7280; text-decoration: none; }

.article h1 { font-size: 26px; color: #111827; line-height: 1.45; margin-bottom: 12px; }
.article .meta { display: flex; align-items: center; gap: 12px; font-size: 12.5px; color: #9ca3af; padding-bottom: 16px; border-bottom: 1px solid #eef1f6; margin-bottom: 22px; flex-wrap: wrap; }
.article .tag { font-size: 11px; color: #0b6cff; background: rgba(11,108,255,.07); padding: 2px 8px; border-radius: 4px; }
.article h2 { font-size: 20px; color: #111827; margin: 30px 0 12px; padding-left: 12px; border-left: 4px solid #0b6cff; line-height: 1.5; }
.article h3 { font-size: 16.5px; color: #1f2937; margin: 22px 0 8px; }
.article p { margin: 10px 0; color: #374151; }
.article ul, .article ol { margin: 10px 0 10px 22px; color: #374151; }
.article li { margin: 6px 0; }
.article strong { color: #111827; }
.article table { width: 100%; border-collapse: collapse; font-size: 13.5px; margin: 14px 0; }
.article td { padding: 9px 12px; border: 1px solid #eef1f6; }
.article td.k { width: 180px; background: #f8fafc; color: #6b7280; font-weight: 600; }
.article img { max-width: 100%; border-radius: 10px; margin: 14px 0; }
.article .img-cap { font-size: 12px; color: #9ca3af; text-align: center; margin: -8px 0 14px; }
.article .tip { background: #f0f7ff; border: 1px solid #d3e6ff; border-radius: 8px; padding: 12px 16px; font-size: 13.5px; color: #1e4e8c; margin: 14px 0; }

/* 文末产品卡 */
.end-ad { margin-top: 30px; background: linear-gradient(150deg, #0e2a4a, #0b3a5e); color: #fff; border-radius: 12px; padding: 22px 24px; display: flex; gap: 20px; align-items: center; }
.end-ad img { width: 130px; height: 100px; object-fit: cover; border-radius: 8px; margin: 0; flex-shrink: 0; }
.end-ad .lbl { font-size: 11px; letter-spacing: 2px; color: #7de3ff; }
.end-ad h3 { color: #fff; margin: 6px 0; font-size: 17px; }
.end-ad p { color: #b9cbe0; font-size: 12.5px; margin: 0 0 10px; }
.end-ad .tel { display: inline-block; background: linear-gradient(135deg, #ff7a00, #ff9500); color: #fff; border-radius: 7px; padding: 9px 22px; font-size: 14px; font-weight: 800; text-decoration: none; }
.end-ad .detail { color: #7de3ff; font-size: 13px; margin-left: 12px; text-decoration: none; }

/* 相关文章 */
.rel { margin-top: 24px; }
.rel h4 { font-size: 14px; color: #111827; margin-bottom: 10px; }
.rel a { display: block; font-size: 13px; color: #0b6cff; text-decoration: none; padding: 5px 0; }
.rel a:hover { text-decoration: underline; }

.side-card { padding: 18px; }
.side-card h4 { font-size: 14px; color: #111827; margin-bottom: 12px; padding-bottom: 10px; border-bottom: 2px solid #0b6cff; display: inline-block; }
.side-card ul { list-style: none; }
.side-card li { font-size: 13px; color: #4b5563; padding: 7px 0; border-bottom: 1px dashed #f0f1f4; }
.side-card li:last-child { border-bottom: none; }
.side-card li span { float: right; color: #9ca3af; font-size: 12px; }

.kd-card { background: linear-gradient(150deg, #0e2a4a, #0b3a5e); color: #fff; padding: 0; border-radius: 12px; overflow: hidden; border: 2px solid #ff9500; box-shadow: 0 8px 24px rgba(255,122,0,.18); }
.kd-img { width: 100%; height: 130px; object-fit: cover; display: block; background: #123c66; }
.kd-body { padding: 16px; }
.kd-card .lbl { font-size: 11px; letter-spacing: 2px; color: #7de3ff; }
.kd-card h3 { font-size: 17px; margin: 6px 0; color: #fff; }
.kd-card p { font-size: 12.5px; color: #b9cbe0; line-height: 1.7; margin: 0; }
.kd-card .tel { display: block; text-align: center; background: linear-gradient(135deg, #ff7a00, #ff9500); color: #fff; border-radius: 8px; padding: 10px; font-size: 15px; font-weight: 800; text-decoration: none; margin-top: 12px; }
.kd-card .detail { display: block; text-align: center; color: #7de3ff; font-size: 13px; text-decoration: none; padding: 8px; border: 1px solid rgba(125,227,255,.4); border-radius: 8px; margin-top: 8px; }

.footer { background: #fff; border-top: 1px solid #e8eaee; margin-top: 30px; padding: 26px 20px; text-align: center; font-size: 12px; color: #9ca3af; line-height: 2; }
.footer b { color: #4b5563; }
.float-contact { position: fixed; right: 16px; top: 45%; transform: translateY(-50%); z-index: 99; display: flex; flex-direction: column; gap: 10px; }
.float-btn { width: 52px; height: 52px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 22px; text-decoration: none; box-shadow: 0 6px 18px rgba(0,0,0,.18); position: relative; }
.float-btn.tel { background: linear-gradient(135deg, #ff7a00, #ff9500); }
.float-btn.wechat { background: linear-gradient(135deg, #07c160, #0ad06e); }
.float-btn span { position: absolute; right: 62px; background: #1a2433; color: #fff; font-size: 12px; padding: 5px 10px; border-radius: 5px; white-space: nowrap; opacity: 0; transition: opacity .2s; pointer-events: none; }
.float-btn:hover span { opacity: 1; }
@media (max-width: 900px) { .sidebar { display: none; } .article { padding: 24px 20px; } .end-ad { flex-direction: column; text-align: center; } }