/* ===== BỐ CỤC TRANG ===== */
.ktpsb-layout{padding:24px 0;display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:32px;align-items:start}
.ktpsb-layout>.ktpsb{align-self:stretch}
@media (max-width:991px){.ktpsb-layout{grid-template-columns:minmax(0,1fr)}}

/* ===== SIDEBAR ===== */
.ktpsb{
  --sb-ink:#0b1020;--sb-text:#334155;--sb-muted:#64748b;--sb-line:#e2e8f0;--sb-bg:#fff;--sb-soft:#f6f8fc;
  --sb-brand:#f28c13;--sb-brand-2:#e56a00;--sb-blue:#2563eb;
  --sb-grad:linear-gradient(120deg,#06b6d4 0%,#3b82f6 45%,#8b5cf6 75%,#ec4899 100%);
  font-family:"Be Vietnam Pro","Inter",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  font-size:15px;line-height:1.55;color:var(--sb-text);display:flex;flex-direction:column;gap:20px;min-width:0
}
.ktpsb *{box-sizing:border-box}
.ktpsb a{text-decoration:none}
.ktpsb-box{background:var(--sb-bg);border:1px solid var(--sb-line);border-radius:16px;padding:20px;box-shadow:0 1px 2px rgba(15,23,42,.04)}
.ktpsb .ktpsb-title{display:flex;align-items:center;gap:8px;margin:0 0 14px;font-size:16px;font-weight:800;color:var(--sb-ink);line-height:1.3}
.ktpsb .ktpsb-title::before{content:"";width:4px;height:18px;border-radius:4px;background:var(--sb-grad)}

/* 1. Liên hệ */
.ktpsb-contact{background:linear-gradient(160deg,#0b1020,#1e1b4b);border:0;color:#cbd5e1;position:relative;overflow:hidden}
.ktpsb-contact::after{content:"";position:absolute;inset:auto -40px -60px auto;width:180px;height:180px;border-radius:50%;background:radial-gradient(circle,rgba(139,92,246,.45),transparent 70%)}
.ktpsb-contact .ktpsb-title{color:#fff}
.ktpsb-contact p{margin:0 0 14px;font-size:14px}
.ktpsb-hotline{display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:12px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);margin-bottom:10px;color:#fff}
.ktpsb-hotline svg{flex:none;width:36px;height:36px;padding:8px;border-radius:10px;background:var(--sb-brand);color:#fff}
.ktpsb-hotline small{display:block;font-size:12px;color:#94a3b8}
.ktpsb-hotline b{font-size:19px;letter-spacing:.02em}
.ktpsb-btns{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:16px}
.ktpsb-btn{display:flex;align-items:center;justify-content:center;gap:6px;padding:10px 12px;border-radius:10px;font-weight:700;font-size:14px;border:0;cursor:pointer;font-family:inherit;transition:transform .2s,box-shadow .2s}
.ktpsb-btn:hover{transform:translateY(-1px)}
.ktpsb-btn.ktpsb-btn-call{background:var(--sb-brand);color:#fff;box-shadow:0 6px 18px -6px rgba(242,140,19,.8)}
.ktpsb-btn.ktpsb-btn-zalo{background:#0068ff;color:#fff;box-shadow:0 6px 18px -6px rgba(0,104,255,.8)}
.ktpsb-form{display:grid;gap:8px;position:relative;z-index:1}
.ktpsb-form label{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.ktpsb-form input,.ktpsb-form select{width:100%;padding:11px 12px;border-radius:10px;border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.08);color:#fff;font:inherit;font-size:14px}
.ktpsb-form select option{color:#0b1020}
.ktpsb-form input::placeholder{color:#94a3b8}
.ktpsb-form input:focus,.ktpsb-form select:focus{outline:2px solid #22d3ee;outline-offset:1px}
.ktpsb-form .ktpsb-btn{width:100%;background:var(--sb-grad);color:#fff;padding:12px}
.ktpsb-note{font-size:12px;color:#94a3b8;margin:8px 0 0;position:relative;z-index:1}

/* Phần dính khi cuộn */
.ktpsb-sticky{position:sticky;top:20px;display:flex;flex-direction:column;gap:20px}

/* 2. Mục lục */
.ktpsb-toc ol{list-style:none;margin:0;padding:0;counter-reset:t;max-height:46vh;overflow:auto}
.ktpsb-toc li{counter-increment:t}
.ktpsb-toc a{display:flex;gap:10px;padding:7px 10px;border-radius:8px;color:var(--sb-text);font-size:14px;line-height:1.4;border-left:2px solid transparent;transition:background .2s,color .2s}
.ktpsb-toc a::before{content:counter(t,decimal-leading-zero);font-weight:700;color:var(--sb-muted);font-size:12px;padding-top:2px}
.ktpsb-toc a:hover{background:var(--sb-soft);color:var(--sb-blue)}
.ktpsb-toc a.is-active{background:#eff6ff;color:var(--sb-blue);border-left-color:var(--sb-blue);font-weight:600}
.ktpsb-toc a.is-active::before{color:var(--sb-blue)}

/* 3. Danh mục giải pháp */
.ktpsb-cats ul{list-style:none;margin:0;padding:0}
.ktpsb-cats li+li{border-top:1px dashed var(--sb-line)}
.ktpsb-cats a{display:flex;align-items:center;gap:12px;padding:10px 4px;color:var(--sb-ink);font-weight:600;font-size:14.5px;transition:color .2s,padding .2s}
.ktpsb-cats a:hover{color:var(--sb-blue);padding-left:8px}
.ktpsb-cats svg{flex:none;width:34px;height:34px;padding:7px;border-radius:10px;background:var(--sb-soft);color:var(--sb-blue)}
.ktpsb-cats a::after{content:"";margin-left:auto;width:7px;height:7px;border-right:2px solid currentColor;border-top:2px solid currentColor;transform:rotate(45deg);opacity:.4}

/* 4. Dự án */
.ktpsb-projects ul{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.ktpsb-projects a{display:flex;gap:12px;align-items:center;color:var(--sb-ink)}
.ktpsb-projects img{flex:none;width:72px;height:72px;border-radius:12px;object-fit:cover;background:var(--sb-soft)}
.ktpsb-projects b{display:block;font-size:14px;line-height:1.35}
.ktpsb-projects small{color:var(--sb-muted);font-size:12.5px}
.ktpsb-projects a:hover b{color:var(--sb-blue)}
.ktpsb-more{display:inline-block;margin-top:14px;font-size:14px;font-weight:700;color:var(--sb-blue)}

/* 5. Cam kết */
.ktpsb-trust ul{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:10px}
.ktpsb-trust li{background:var(--sb-soft);border-radius:12px;padding:12px;font-size:13px;color:var(--sb-muted)}
.ktpsb-trust b{display:block;font-size:17px;color:var(--sb-ink);line-height:1.3}

/* Điện thoại: sidebar nằm dưới bài, ẩn mục lục (đã có trong bài), bỏ dính */
@media (max-width:991px){
  .ktpsb-sticky{position:static}
  .ktpsb-toc{display:none}
}
@media (prefers-reduced-motion:reduce){.ktpsb *{transition:none !important}}
/* Chặn CSS sẵn có của web (nút gọi/Zalo nổi, căn giữa ảnh) */
.ktpsb a,.ktpsb .ktpsb-btn{position:static !important;float:none !important;transform:none;animation:none !important}
.ktpsb img{margin:0 !important;float:none !important;max-width:none}
.ktpsb svg{display:block}
.ktpsb .ktpsb-hotline svg{width:36px !important;height:36px !important}
.ktpsb .ktpsb-cats svg{width:34px !important;height:34px !important}
.ktpsb ul,.ktpsb ol{margin:0;padding:0}
.ktpsb li{margin:0;list-style:none}
/* Cột bài viết */
.ktpsb-article{min-width:0;padding:8px}
.ktpsb-article h1{padding-bottom:20px}
.ktpsb-article .ktpsb-lead{font-style:italic;color:#555;line-height:1.6;font-weight:700}