:root{--navy:#1d2a78;--navy-2:#141e5c;--red:#e3222b;--red-2:#c4161f;--green:#1aa260;--ink:#1b2033;--muted:#5b6275;--line:#e4e7ef;--soft:#f4f6fb;--warm:#fff6f6;--gold:#ffd23f}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Be Vietnam Pro",system-ui,sans-serif;color:var(--ink);background:var(--soft);line-height:1.75;font-size:17px}
a{color:inherit}
img{max-width:100%;display:block}
picture{display:contents}
.wrap{max-width:1140px;margin:0 auto;padding:0 16px}
.top{background:var(--navy-2);color:#dfe6ff;font-size:13.5px;padding:6px 0}
.top .wrap{display:flex;justify-content:space-between;gap:10px}
.top b{color:var(--gold);white-space:nowrap}
header{background:#fff;box-shadow:0 2px 14px rgba(20,30,92,.08);position:sticky;top:0;z-index:20}
header .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:10px;padding-bottom:10px}
header img{height:50px;width:auto}
header nav{display:flex;gap:4px;font-weight:700;font-size:15px}
header nav a{text-decoration:none;padding:8px 12px;border-radius:10px;color:var(--navy)}
header nav a:hover,header nav a.on{background:var(--warm);color:var(--red)}
.nut{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:999px;padding:11px 20px;font-weight:800;text-decoration:none;white-space:nowrap;font-size:15.5px}
.nut-do{background:var(--red);color:#fff;box-shadow:0 6px 16px rgba(227,34,43,.3)}
.nut-do:hover{background:var(--red-2)}
.nut-vien{border:2px solid var(--navy);color:var(--navy);background:#fff}
.nut-zalo{background:#0068ff;color:#fff}
/* đầu trang */
.dau{background:linear-gradient(120deg,var(--navy-2),var(--navy) 55%,#24359a);color:#fff;padding:40px 0 36px}
.duong{font-size:14px;color:#c9d2f5;margin-bottom:12px}
.duong a{color:var(--gold);text-decoration:none;font-weight:700}
.dau h1{font-size:clamp(27px,4.2vw,42px);font-weight:900;line-height:1.22;text-shadow:2px 3px 0 #0b1244;max-width:880px}
.dau .mo{color:#dfe6ff;margin-top:12px;max-width:760px;font-size:17.5px}
.the-tg{display:flex;flex-wrap:wrap;align-items:center;gap:8px 16px;margin-top:18px;font-size:14px;color:#c9d2f5}
.the-tg img{width:40px;height:40px;border-radius:50%;background:#fff;padding:3px;object-fit:contain}
.the-tg b{color:#fff}
/* danh sách bài */
.loc{display:flex;flex-wrap:wrap;gap:8px;margin:28px 0 6px}
.loc span{padding:7px 14px;border-radius:999px;background:#fff;border:1.5px solid var(--line);font-weight:700;font-size:14px;color:var(--navy)}
/* 3 mục Cẩm nang: Mối hộ dân / Chống mối công trình / Côn trùng */
.loc{position:sticky;top:70px;z-index:10;background:var(--soft);padding:12px 0;margin:16px 0 0}
.loc a{display:inline-flex;align-items:center;gap:6px;padding:9px 16px;border-radius:999px;background:#fff;border:2px solid var(--line);font-weight:800;font-size:15px;color:var(--navy);text-decoration:none;transition:all .15s}
.loc a b{min-width:24px;height:22px;padding:0 7px;border-radius:999px;background:var(--soft);color:var(--navy);font-size:12.5px;display:inline-grid;place-items:center}
.loc a:hover{border-color:var(--red);color:var(--red)}
.loc a.on{background:var(--red);border-color:var(--red);color:#fff;box-shadow:0 6px 16px rgba(227,34,43,.3)}
.loc a.on b{background:#fff;color:var(--red)}
.nhom{padding-top:18px;scroll-margin-top:140px}
.nhom-dau{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 14px;border-left:6px solid var(--red);padding:4px 0 4px 14px;margin:14px 0 4px}
.nhom-dau h2{font-size:clamp(22px,2.6vw,28px);font-weight:900;color:var(--navy)}
.nhom-dau p{color:var(--muted);font-size:15px}
.nhom-trong{background:#fff;border:1.5px dashed var(--line);border-radius:14px;padding:18px;color:var(--muted);margin:16px 0 40px}
.nhom-trong a{color:var(--red);font-weight:800;text-decoration:none;white-space:nowrap}
.nhom.an{display:none}
@media (max-width:640px){.loc{top:62px;display:flex;flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;margin:8px -12px 0;padding:10px 12px}.loc::-webkit-scrollbar{display:none}.loc a{flex:none;font-size:14px;padding:8px 13px}.nhom-dau{margin-top:8px}}
.ds-bai{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;padding:18px 0 56px}
.bai-the{background:#fff;border-radius:18px;overflow:hidden;border:1px solid var(--line);box-shadow:0 10px 26px rgba(20,30,92,.06);text-decoration:none;display:flex;flex-direction:column;transition:transform .2s,box-shadow .2s}
.bai-the:hover{transform:translateY(-4px);box-shadow:0 16px 34px rgba(20,30,92,.12)}
.bai-the .anh{aspect-ratio:16/10;overflow:hidden;background:var(--soft)}
.bai-the .anh img{width:100%;height:100%;object-fit:cover}
.bai-the .nd{padding:18px 20px 20px;display:flex;flex-direction:column;gap:8px;flex:1}
.nhan{align-self:flex-start;font-size:12.5px;font-weight:800;text-transform:uppercase;letter-spacing:.04em;color:var(--red);background:var(--warm);padding:4px 10px;border-radius:999px}
.bai-the h2{font-size:19.5px;line-height:1.35;font-weight:800;color:var(--navy)}
.bai-the p{font-size:15px;color:var(--muted);line-height:1.6}
.bai-the .doc{margin-top:auto;font-weight:800;color:var(--red);font-size:15px}
/* bài viết */
.luoi{display:grid;grid-template-columns:1fr 300px;gap:30px;padding:30px 16px 60px;align-items:start}
.bai{background:#fff;border-radius:20px;padding:34px 40px;border:1px solid var(--line);box-shadow:0 10px 26px rgba(20,30,92,.06);min-width:0}
.bai h2{font-size:clamp(22px,2.8vw,28px);font-weight:900;color:var(--navy);margin:34px 0 10px;line-height:1.3;scroll-margin-top:90px}
.bai h3{font-size:19px;font-weight:800;color:var(--navy);margin:22px 0 6px}
.bai p{margin:10px 0;color:#2b3147}
.bai ul,.bai ol{padding-left:22px;margin:10px 0;display:grid;gap:6px;color:#2b3147}
.bai li::marker{color:var(--red);font-weight:800}
.bai strong{color:var(--ink)}
.tra-loi{background:linear-gradient(135deg,#eef3ff,#fff);border:1.5px solid #c9d6ff;border-left:6px solid var(--navy);border-radius:14px;padding:18px 20px;margin-bottom:8px}
.tra-loi b{display:block;color:var(--navy);font-size:15px;text-transform:uppercase;letter-spacing:.04em;margin-bottom:4px}
.tra-loi p{margin:0}
.hinh{margin:22px auto;max-width:460px}
.hinh img{width:100%;border-radius:14px;border:1px solid var(--line)}
.hinh figcaption{font-size:14px;color:var(--muted);margin-top:8px;text-align:center}
.hinh-3{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:22px 0}
.hinh-3 figure img{aspect-ratio:4/5;object-fit:cover;object-position:50% 15%;width:100%;border-radius:12px}
.hinh-3 figcaption{font-size:13.5px;color:var(--muted);margin-top:6px;text-align:center;line-height:1.4}
.bang{width:100%;border-collapse:collapse;margin:14px 0;font-size:15.5px;border-radius:12px;overflow:hidden}
.bang th{background:var(--navy);color:#fff;text-align:left;padding:11px 12px}
.bang td{padding:11px 12px;border-bottom:1px solid var(--line);vertical-align:top}
.bang tr:nth-child(even) td{background:var(--soft)}
.cuon-bang{overflow-x:auto;-webkit-overflow-scrolling:touch}
.luu-y{background:var(--warm);border:1.5px dashed #ffb3b6;border-radius:14px;padding:14px 18px;margin:18px 0}
.luu-y b{color:var(--red)}
.buoc{counter-reset:b;list-style:none;padding:0!important}
.buoc li{counter-increment:b;position:relative;padding:12px 14px 12px 58px;background:var(--soft);border-radius:12px}
.buoc li::before{content:counter(b);position:absolute;left:14px;top:12px;width:32px;height:32px;border-radius:10px;background:var(--red);color:#fff;font-weight:900;display:grid;place-items:center}
.hoi{border:1px solid var(--line);border-radius:12px;margin:10px 0;background:#fff}
.hoi summary{cursor:pointer;font-weight:800;color:var(--navy);padding:14px 44px 14px 16px;list-style:none;position:relative}
.hoi summary::-webkit-details-marker{display:none}
.hoi summary::after{content:"+";position:absolute;right:16px;top:9px;font-size:24px;color:var(--red)}
.hoi[open] summary::after{content:"−"}
.hoi div{padding:0 16px 14px;color:#2b3147}
.keu{background:linear-gradient(120deg,var(--navy-2),var(--navy));color:#fff;border-radius:18px;padding:26px 26px;margin:34px 0 10px;display:grid;gap:10px}
.keu h2{color:#fff;margin:0;font-size:23px}
.keu p{color:#dfe6ff;margin:0}
.keu .lh{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px}
.tac-gia{display:flex;gap:14px;align-items:flex-start;border-top:1px solid var(--line);margin-top:30px;padding-top:22px;font-size:15px;color:var(--muted)}
.tac-gia img{width:56px;height:56px;border-radius:14px;border:1px solid var(--line);padding:4px;object-fit:contain;flex:none}
.tac-gia b{color:var(--navy);display:block;font-size:16px}
/* cột phải */
.cot{position:sticky;top:90px;display:grid;gap:18px}
.khoi{background:#fff;border-radius:18px;padding:20px;border:1px solid var(--line);box-shadow:0 8px 22px rgba(20,30,92,.06)}
.khoi > b{display:block;color:var(--navy);font-size:16px;margin-bottom:10px}
.muc-luc a{display:block;padding:7px 10px;border-radius:10px;text-decoration:none;font-weight:600;color:var(--muted);font-size:14.5px;line-height:1.45}
.muc-luc a:hover,.muc-luc a.on{background:var(--warm);color:var(--red)}
.khoi-dat{background:linear-gradient(160deg,var(--red),#b5121a);color:#fff;border:0}
.khoi-dat b{color:#fff!important;font-size:19px!important}
.khoi-dat p{font-size:14.5px;color:#ffe3e4;margin-bottom:12px;line-height:1.55}
.khoi-dat .nut{width:100%;background:#fff;color:var(--red);margin-top:8px}
.khoi-dat .so{display:block;text-align:center;font-weight:900;font-size:22px;margin-top:10px;text-decoration:none;white-space:nowrap}
.lien-quan a{display:flex;gap:10px;align-items:center;text-decoration:none;padding:8px 0;border-bottom:1px dashed var(--line);font-weight:700;color:var(--navy);font-size:14.5px;line-height:1.4}
.lien-quan a:last-child{border:0}
.lien-quan img{width:64px;height:48px;border-radius:8px;object-fit:cover;flex:none}
footer{background:var(--navy-2);color:#c9d2f5;font-size:14px;padding:26px 0 26px}
footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px}
footer a{color:#fff}
.thanh-dt{display:none}
@media (max-width:980px){.ds-bai{grid-template-columns:repeat(2,1fr)}.luoi{grid-template-columns:1fr}.cot{position:static}.cot .muc-luc-khoi{display:none}}
@media (max-width:640px){
  body{font-size:16.5px;padding-bottom:62px}
  header img{height:42px}header nav{display:none}.top .an-dt{display:none}
  .nut{padding:9px 14px;font-size:14.5px}
  .ds-bai{grid-template-columns:1fr}
  .bai{padding:22px 18px;border-radius:16px}
  .luoi{padding:18px 12px 40px}
  .hinh-3{grid-template-columns:1fr 1fr}
  .hinh-3 figure:last-child{grid-column:1/-1}
  .hinh-3 figure:last-child img{aspect-ratio:16/10}
  .thanh-dt{display:grid;grid-template-columns:1fr 1fr;position:fixed;left:0;right:0;bottom:0;z-index:30;box-shadow:0 -4px 16px rgba(0,0,0,.15)}
  .thanh-dt a{display:flex;align-items:center;justify-content:center;gap:8px;padding:14px 6px;font-weight:800;color:#fff;text-decoration:none;font-size:16px}
  .thanh-dt a:first-child{background:var(--red)}.thanh-dt a:last-child{background:#0068ff}
}

/* ===== Nút nhấp nháy giống trang chủ (sếp 07/11/2026) ===== */
.nut-do,.nut-zalo,.khoi-dat .nut{position:relative;overflow:hidden}
.nut-do{animation:btnNhay 1s ease-in-out infinite}
.nut-do::after,.khoi-dat .nut::after,.nut-zalo::after{content:"";position:absolute;top:0;left:-60%;width:40%;height:100%;background:linear-gradient(100deg,transparent,rgba(255,255,255,.55),transparent);transform:skewX(-20deg);animation:btnSang 1.6s ease-in-out infinite;pointer-events:none}
.khoi-dat .nut::after{background:linear-gradient(100deg,transparent,rgba(227,34,43,.22),transparent)}
@keyframes btnNhay{0%,100%{transform:scale(1);box-shadow:0 0 0 0 rgba(227,34,43,.6),0 6px 16px rgba(227,34,43,.3)}50%{transform:scale(1.06);box-shadow:0 0 0 10px rgba(227,34,43,0),0 8px 20px rgba(227,34,43,.4)}}
@keyframes btnSang{0%{left:-60%}60%,100%{left:130%}}
.nut-zalo{animation:zaloSong 1.4s ease-out infinite,zaloNhun 1.4s ease-in-out infinite}
@keyframes zaloSong{0%{box-shadow:0 0 0 0 rgba(0,104,255,.65),0 8px 22px rgba(0,104,255,.35)}70%{box-shadow:0 0 0 14px rgba(0,104,255,0),0 8px 22px rgba(0,104,255,.35)}100%{box-shadow:0 0 0 0 rgba(0,104,255,0),0 8px 22px rgba(0,104,255,.35)}}
@keyframes zaloNhun{0%,100%{transform:scale(1)}50%{transform:scale(1.06)}}
.khoi-dat .nut{animation:datNhay 1s ease-in-out infinite}
@keyframes datNhay{0%,100%{transform:scale(1);box-shadow:0 0 0 0 rgba(255,255,255,.7)}50%{transform:scale(1.05);box-shadow:0 0 0 9px rgba(255,255,255,0)}}
/* Số điện thoại: nhấp nháy trắng ⇄ vàng, ống nghe rung */
.khoi-dat .so{animation:soNhay 1s ease-in-out infinite}
@keyframes soNhay{0%,100%{color:#fff;transform:scale(1)}50%{color:#ffd23f;transform:scale(1.07)}}
.khoi-dat .so::before{content:"📞 ";display:inline-block;animation:ring 1.2s ease-in-out infinite}
.top b{animation:nhayChu 1s ease-in-out infinite}
@keyframes nhayChu{0%,100%{opacity:1}50%{opacity:.45}}
@keyframes ring{0%,100%{transform:rotate(0)}10%{transform:rotate(-16deg)}20%{transform:rotate(16deg)}30%{transform:rotate(-10deg)}40%{transform:rotate(0)}}
/* Thanh Gọi / Zalo dưới đáy điện thoại */
.thanh-dt a:first-child span,.thanh-dt .ong{display:inline-block;animation:ring 1s ease-in-out infinite}
.thanh-dt a:last-child{animation:nenZalo 1.6s ease-in-out infinite}
@keyframes nenZalo{0%,100%{background:#0068ff}50%{background:#2f86ff}}
.thanh-dt a:last-child::before{content:"";width:9px;height:9px;border-radius:50%;background:#7CFF9B;animation:chamXanh 1.4s infinite}
@keyframes chamXanh{0%{box-shadow:0 0 0 0 rgba(124,255,155,.8)}80%{box-shadow:0 0 0 9px rgba(124,255,155,0)}100%{box-shadow:0 0 0 0 rgba(124,255,155,0)}}
/* Nút lên đầu trang (cn.js tự thêm vào mọi trang Cẩm nang) */
.len-dau{position:fixed;right:22px;bottom:28px;z-index:40;width:52px;height:52px;border-radius:50%;border:2px solid #fff;background:linear-gradient(180deg,#2a3a9a,var(--navy-2));color:#fff;display:grid;place-items:center;align-content:center;cursor:pointer;box-shadow:0 8px 20px rgba(20,30,92,.35);opacity:0;visibility:hidden;transform:translateY(14px);transition:opacity .25s,transform .25s,visibility .25s,background .2s;font:inherit;padding:0}
.len-dau.hien{opacity:1;visibility:visible;transform:none}
.len-dau:hover{background:var(--red)}
.len-dau svg{width:20px;height:20px;animation:lenNhun 1.4s ease-in-out infinite}
.len-dau span{font-size:9.5px;font-weight:800;line-height:1;margin-top:1px}
@keyframes lenNhun{0%,100%{transform:translateY(1px)}50%{transform:translateY(-3px)}}
@media (max-width:640px){.len-dau{right:14px;bottom:76px;width:46px;height:46px}.len-dau svg{width:18px;height:18px}.len-dau span{font-size:8.5px}}
@media (prefers-reduced-motion:reduce){.nut-do,.nut-zalo,.khoi-dat .nut,.khoi-dat .so,.top b,.thanh-dt a,.nut-do::after,.nut-zalo::after,.khoi-dat .nut::after,.thanh-dt a:first-child span,.len-dau svg{animation:none}}