/* =========================================================================
   X-DMAIC post.css — bài viết (canvas "Kiến thức – chi tiết bài viết").
   Thẻ bài "Đọc tiếp" dùng chung blog.css; thành phần chung ở core.css.
   ========================================================================= */

body{background:var(--xd-paper)}
.xd-page{background:var(--xd-paper);color:var(--xd-ink)}

/* Thanh tiến độ đọc */
.xd-progress{position:fixed;left:0;right:0;top:0;height:3px;z-index:50;pointer-events:none}
.xd-progress i{display:block;height:100%;width:0;background:var(--xd-lime)}

/* ---------- Đầu bài (nền lưới xanh thương hiệu, như trang chủ và Liên hệ; design cập nhật 20/10) ----------
   Chữ phụ trên nền xanh dùng trắng (≥ 4.5:1); lime chỉ cho nhãn chuỗi bài (chữ Ink trên nền lime). */
.xd-phead{padding-bottom:220px}
/* Bài không có ảnh bìa/video: không chừa chỗ cho ảnh trồi lên */
.xd-phead--flat{padding-bottom:64px}
/* Thẳng mép trái với logo header (như trang Kiến thức); độ dài dòng giới hạn ở từng phần tử */
.xd-phead__in{display:flex;flex-direction:column;gap:20px;padding-top:56px}
.xd-phead__top{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.xd-phead .xd-crumb{color:#fff}
.xd-phead .xd-crumb a{color:#fff}
.xd-phead .xd-crumb a:hover{text-decoration:underline}
.xd-phead .xd-crumb [aria-current]{color:rgba(255,255,255,.92)}
.xd-pseries{font-size:12px;font-weight:700;padding:5px 10px;border-radius:999px;background:var(--xd-lime);color:var(--xd-ink)}
.xd-btag--dark{color:#fff}
.xd-phead__h{font-size:var(--xd-t-h1-detail);font-weight:800;line-height:1.1;letter-spacing:-.035em;max-width:980px}
.xd-phead__dek{font-size:clamp(17px,1.5vw,20px);line-height:1.65;color:#fff;max-width:760px}
.xd-phead__bar{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;margin-top:12px;padding-top:24px;border-top:1px solid rgba(255,255,255,.3);max-width:980px}
.xd-pau{display:flex;align-items:center;gap:14px;text-decoration:none}
.xd-pau img{width:44px;height:44px;border-radius:99px;object-fit:cover}
.xd-pau>span:last-child{display:flex;flex-direction:column;gap:2px}
.xd-pau b{font-size:15px}
.xd-pau:hover b{text-decoration:underline}
.xd-phead__meta{font-size:13.5px;color:rgba(255,255,255,.92);font-variant-numeric:tabular-nums}
.xd-prv{display:inline-flex;align-items:center;gap:8px;font-size:13.5px;padding:8px 14px;border-radius:999px;background:var(--xd-ink);color:#fff}
.xd-prv svg{color:var(--xd-lime)}

/* Sản phẩm Labs: trạng thái cạnh nhãn loại, thẻ thông số ở cột trái */
.xd-pstatus{margin-left:10px;padding:3px 9px;border-radius:999px;background:var(--xd-lime);color:var(--xd-ink);font-size:11px;font-weight:800;letter-spacing:.1em;text-transform:uppercase}
.xd-phead .xd-on-blue{color:#fff}
.xd-pspec{display:flex;flex-direction:column;padding:18px 20px;border-radius:20px;background:var(--xd-ink);color:#fff}
.xd-pspec div{display:flex;flex-direction:column;gap:2px;padding:10px 0;border-top:1px solid var(--xd-line-dark)}
.xd-pspec div:first-child{border-top:0;padding-top:0}
.xd-pspec span{font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--xd-muted)}
.xd-pspec b{font-size:14px;line-height:1.45}

/* Ảnh đại diện kéo lên đè đầu bài */
.xd-pcover{margin-top:-180px;position:relative}
.xd-pcover img{width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;border-radius:28px;background:var(--xd-ink);box-shadow:var(--xd-shadow-2)}
.xd-pvideo__btn{position:relative;display:block;width:100%;padding:0;border:0;background:none;cursor:pointer;border-radius:28px}
.xd-pvideo__btn:focus-visible{outline:3px solid var(--xd-lime);outline-offset:4px}
.xd-pvideo__play{position:absolute;left:50%;top:50%;display:grid;place-items:center;width:88px;height:88px;margin:-44px 0 0 -44px;border-radius:50%;background:var(--xd-lime);color:var(--xd-ink);box-shadow:var(--xd-shadow-2);transition:transform var(--xd-fast)}
.xd-pvideo__btn:hover .xd-pvideo__play{transform:scale(1.08)}
.xd-pvideo__lbl{position:absolute;left:20px;bottom:20px;padding:8px 14px;border-radius:999px;background:var(--xd-ink);color:#fff;font-size:14px;font-weight:700}
.xd-pvideo iframe{display:block;width:100%;height:auto;aspect-ratio:16/9;border:0;border-radius:28px;background:var(--xd-ink);box-shadow:var(--xd-shadow-2)}

/* ---------- Bố cục: mục lục bên trái, bài bên phải ---------- */
.xd-playout{display:grid;grid-template-columns:260px minmax(0,760px);justify-content:start;gap:72px;padding-top:56px}
.xd-paside{position:sticky;top:24px;align-self:start;display:flex;flex-direction:column;gap:24px;max-height:calc(100vh - 48px);overflow:auto;padding-bottom:8px}
.xd-ptoc{display:flex;flex-direction:column;gap:10px}
.xd-ptoc__prog{display:block;height:3px;border-radius:3px;background:var(--xd-line)}
.xd-ptoc__prog i{display:block;height:100%;width:0;border-radius:3px;background:var(--xd-blue)}
.xd-ptoc ol,.xd-ptoc-m ol{list-style:none;margin:0;padding:0;display:flex;flex-direction:column}
.xd-ptoc a{display:block;padding:8px 0 8px 14px;border-left:2px solid var(--xd-line);font-size:14px;line-height:1.45;color:var(--xd-sub-2);text-decoration:none;transition:color var(--xd-fast),border-color var(--xd-fast)}
.xd-ptoc .xd-ptoc__l3 a{padding-left:28px;font-size:13px}
.xd-ptoc a:hover{color:var(--xd-ink)}
.xd-ptoc a.is-on{color:var(--xd-ink);font-weight:600;border-left-color:var(--xd-blue)}
.xd-pshare{display:flex;flex-direction:column;gap:10px;padding-top:18px;border-top:1px solid var(--xd-line)}
.xd-pshare__btns{display:flex;flex-wrap:wrap;gap:8px}
.xd-pshare .xb-line{color:var(--xd-ink)}
.xd-pmini{display:flex;flex-direction:column;gap:4px;padding:20px;border-radius:20px;background:var(--xd-ink);color:#fff;text-decoration:none}
.xd-pmini b{font-size:16px}
.xd-pmini span{font-size:13.5px;color:rgba(255,255,255,.75)}
.xd-pmini i{font-style:normal;display:inline-flex;align-items:center;gap:8px;margin-top:10px;font-weight:700;color:var(--xd-lime)}
.xd-pmini:hover i svg{transform:translateX(3px)}
.xd-pmini i svg{transition:transform var(--xd-fast)}

.xd-part{min-width:0}
.xd-ptoc-m{display:none;margin-bottom:28px;border:1px solid var(--xd-line);border-radius:16px;background:#fff}
.xd-ptoc-m summary{min-height:52px;display:flex;align-items:center;gap:6px;padding:0 18px;font-weight:700;cursor:pointer}
.xd-ptoc-m ol{padding:0 18px 14px}
.xd-ptoc-m a{display:block;padding:8px 0;border-top:1px solid var(--xd-line);color:var(--xd-sub-2);text-decoration:none;font-size:15px}
.xd-ptoc-m .xd-ptoc__l3 a{padding-left:16px}

.xd-ptldr{margin-bottom:36px;padding:24px 28px;border-radius:20px;background:#fff;border:1px solid var(--xd-line);border-left-width:1px}
.xd-ptldr b{display:block;font-size:13px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--xd-blue);margin-bottom:10px}
.xd-ptldr ul{margin:0;padding:0 0 0 20px;display:flex;flex-direction:column;gap:6px;font-size:16px;line-height:1.6}

/* ---------- Nội dung bài (HTML từ Markdown + shortcode) ---------- */
.xd-prose{position:relative;font-size:17.5px;line-height:1.8;color:#1F2937}
.xd-prose>*+*{margin-top:1.1em}
.xd-prose h2{margin-top:2.2em;font-size:clamp(26px,2.4vw,32px);font-weight:800;line-height:1.25;letter-spacing:-.02em;color:var(--xd-ink);scroll-margin-top:24px}
.xd-prose h3{margin-top:1.8em;font-size:21px;font-weight:700;line-height:1.35;color:var(--xd-ink);scroll-margin-top:24px}
.xd-prose h4{margin-top:1.6em;font-size:18px;font-weight:700;color:var(--xd-ink)}
.xd-prose h2:first-child,.xd-prose h3:first-child{margin-top:0}
.xd-prose p,.xd-prose ul,.xd-prose ol{margin-bottom:0}
.xd-prose ul,.xd-prose ol{padding-left:1.4em}
.xd-prose li+li{margin-top:.4em}
.xd-prose li::marker{color:var(--xd-blue)}
.xd-prose strong{color:var(--xd-ink);font-weight:700}
.xd-prose a{color:var(--xd-blue);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
.xd-prose a:hover{text-decoration-thickness:2px}
.xd-prose .xd-acta a.xb{color:var(--xd-ink);text-decoration:none} /* nút trong CTA giữa bài không ăn kiểu link */
/* Chú thích sơ đồ AI SEO Graph: plugin in màu #727a89 (3.9:1 trên nền giấy), nâng lên đủ 4.5:1 */
.xd-prose .aisg-caption{color:var(--xd-sub)!important;opacity:1!important}
.xd-prose .aisg-caption a{color:var(--xd-blue)}
.xd-prose hr{border:0;height:1px;background:var(--xd-line);margin:2.4em 0}
.xd-prose blockquote{margin-left:0;margin-right:0;padding:4px 0 4px 24px;border-left:3px solid var(--xd-lime);font-size:clamp(17px,1.6vw,19px);line-height:1.65;font-weight:600;color:var(--xd-ink)}
.xd-prose blockquote p{margin:0}
.xd-prose code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.88em;padding:2px 6px;border-radius:6px;background:#E9ECF2}
.xd-prose pre{overflow:auto;padding:18px 20px;border-radius:14px;background:var(--xd-ink);color:#E3E6EC;font-size:14px;line-height:1.6}
.xd-prose pre code{padding:0;background:none;color:inherit}
.xd-prose img{border-radius:16px;height:auto}
.xd-prose figure{margin:2em 0}
.xd-prose figcaption{margin-top:10px;font-size:14px;line-height:1.55;color:var(--xd-sub)}
/* Bảng: cuộn ngang trong khung trên điện thoại */
.xd-prose table{display:block;width:100%;overflow-x:auto;border-collapse:collapse;font-size:15px;line-height:1.55;background:#fff;border:1px solid var(--xd-line);border-radius:16px}
.xd-prose thead th{background:#F8F9FB;font-size:13px;font-weight:700;color:var(--xd-sub-2);text-align:left}
.xd-prose th,.xd-prose td{padding:12px 16px;border-top:1px solid var(--xd-line);vertical-align:top;min-width:120px}
.xd-prose tr:first-child th,.xd-prose tr:first-child td{border-top:0}
/* Sơ đồ AI SEO Graph: plugin tự mang CSS, theme chỉ cho khoảng thở */
.xd-prose .aisg-graph-figure{margin:2.2em 0}
/* FAQ shortcode: details.faq-item (bỏ emoji, dùng dấu +) */
.xd-prose .faq-item{border:1px solid var(--xd-line);border-radius:16px;background:#fff;overflow:hidden}
.xd-prose .faq-item+.faq-item{margin-top:10px}
.xd-prose .faq-question{list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px;min-height:56px;padding:12px 20px;font-weight:700;font-size:16.5px;color:var(--xd-ink);cursor:pointer}
.xd-prose .faq-question::-webkit-details-marker{display:none}
.xd-prose .faq-question::after{content:"+";flex:none;font-size:22px;font-weight:400;color:var(--xd-blue);transition:transform var(--xd-fast)}
.xd-prose .faq-item[open] .faq-question::after{transform:rotate(45deg)}
.xd-prose .faq-icon,.xd-prose .alert-icon{display:none}
.xd-prose .faq-answer{padding:0 20px 16px;font-size:16px;line-height:1.7;color:var(--xd-sub-2)}
.xd-prose .faq-answer p{margin:0}
/* Alert shortcode: khung ghi chú, màu theo loại */
.xd-prose .alert-block{display:flex;gap:14px;padding:18px 20px;border-radius:16px;background:var(--xd-blue-50);border:1px solid var(--xd-blue-100);font-size:16px;line-height:1.65}
.xd-prose .alert-block::before{content:"i";flex:none;width:24px;height:24px;border-radius:99px;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800;background:var(--xd-blue);color:#fff}
.xd-prose .alert-warning{background:#FFF7E6;border-color:#FDE2A7}.xd-prose .alert-warning::before{content:"!";background:#B45309}
.xd-prose .alert-danger{background:#FEF2F2;border-color:#FECACA}.xd-prose .alert-danger::before{content:"!";background:var(--xd-error)}
.xd-prose .alert-success{background:#F0FDF4;border-color:#BBF7D0}.xd-prose .alert-success::before{content:"✓";background:var(--xd-success)}
.xd-prose .alert-content>*{margin:0}
.xd-prose .cta-interactive-wrap button{min-height:52px;padding:0 24px;border:0;border-radius:999px;background:var(--xd-lime)!important;color:var(--xd-ink)!important;font-weight:700}
#sm-read-marker{position:absolute;top:75%;left:0;width:1px;height:1px;pointer-events:none;visibility:hidden}

/* CTA giữa / cuối bài */
.xd-acta{position:relative;display:grid;grid-template-columns:minmax(0,1fr) 150px;gap:24px;align-items:center;margin:2.4em 0;padding:28px 32px;border-radius:24px;background:var(--xd-ink);color:#fff;overflow:hidden}
.xd-acta__copy{display:flex;flex-direction:column;gap:12px;align-items:flex-start}
.xd-acta b{font-size:21px;line-height:1.3}
.xd-acta span{font-size:15.5px;line-height:1.6;color:rgba(255,255,255,.8)}
.xd-acta img{width:150px;height:auto;margin-bottom:-36px}

/* Cuối bài */
.xd-ptags{display:flex;flex-wrap:wrap;gap:8px;margin-top:48px}
.xd-ptags a{display:inline-flex;align-items:center;min-height:36px;padding:0 14px;border-radius:999px;border:1.5px solid var(--xd-line);background:#fff;font-size:14px;font-weight:600;text-decoration:none}
.xd-ptags a:hover{border-color:var(--xd-ink)}
.xd-phelp{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;margin-top:24px;padding:18px 22px;border-radius:16px;background:#fff;border:1px solid var(--xd-line);font-weight:600}
.xd-phelp__btns{display:flex;gap:8px}
.xd-phelp .xb-line{color:var(--xd-ink)}
.xd-pauthor{display:flex;gap:18px;align-items:flex-start;margin-top:24px;padding:24px;border-radius:20px;background:#fff;border:1px solid var(--xd-line)}
.xd-pauthor img{width:64px;height:64px;border-radius:99px;object-fit:cover;flex:none}
.xd-pauthor>div{display:flex;flex-direction:column;gap:4px}
.xd-pauthor__n{font-size:18px;font-weight:800;text-decoration:none}
.xd-pauthor__n:hover{color:var(--xd-blue)}
.xd-pauthor p{margin:6px 0 0;font-size:15px;line-height:1.65;color:var(--xd-sub-2)}
.xd-pauthor .xd-textlink{min-height:36px;color:var(--xd-blue)}
.xd-pnav{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:24px}
.xd-pnav a{display:flex;flex-direction:column;gap:4px;padding:18px 20px;border-radius:16px;border:1px solid var(--xd-line);background:#fff;text-decoration:none}
.xd-pnav a:hover{border-color:var(--xd-ink)}
.xd-pnav small{font-size:13px;color:var(--xd-sub)}
.xd-pnav b{font-size:16px}
.xd-pnav__next{text-align:right;grid-column:2}

.xd-prel{padding-top:96px;padding-bottom:var(--xd-section-y)}
.xd-prel .xd-bgrid{grid-template-columns:repeat(3,minmax(0,1fr))}
.xd-prel .xb-line{color:var(--xd-ink)}

@media (max-width:1100px){
  .xd-playout{grid-template-columns:minmax(0,760px)}
  .xd-paside{display:none}
  .xd-ptoc-m{display:block}
}
@media (max-width:960px){
  .xd-phead{padding-bottom:120px}
  .xd-phead--flat{padding-bottom:40px}
  .xd-phead__in{padding-top:32px}
  .xd-pcover{margin-top:-90px}
  .xd-pcover img,.xd-pvideo iframe,.xd-pvideo__btn{border-radius:18px}
  .xd-pvideo__play{width:64px;height:64px;margin:-32px 0 0 -32px}
  .xd-playout{padding-top:36px}
  .xd-prose{font-size:17px}
  .xd-acta{grid-template-columns:minmax(0,1fr);padding:24px}
  .xd-acta img{display:none}
  .xd-prel .xd-bgrid{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
}
@media (max-width:640px){
  .xd-pnav{grid-template-columns:minmax(0,1fr)}
  .xd-pnav__next{grid-column:auto}
  .xd-prel .xd-bgrid{grid-template-columns:minmax(0,1fr)}
}