/* ============================================================
   บทความ (single.php) — เลย์เอาต์ใหม่
   ============================================================ */
.art-hero{position:relative;overflow:hidden;color:#fff;padding:140px 0 92px;margin-top:-84px;
  background:
    radial-gradient(720px 460px at 82% 6%, rgba(124,120,255,.28), transparent 62%),
    radial-gradient(600px 420px at 8% 92%, rgba(70,140,255,.2), transparent 60%),
    linear-gradient(150deg,#060F2B 0%,#0E1E52 28%,#1B3488 56%,#3450B8 82%,#6A6BD8 100%)}
.art-hero::before{content:"";position:absolute;inset:-30% -20%;pointer-events:none;
  background:linear-gradient(102deg,transparent 34%,rgba(255,255,255,.12) 40%,transparent 47%);
  transform:rotate(-6deg)}
.art-hero > .wrap{position:relative;z-index:2;max-width:900px}
.crumb{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-family:var(--f-data);
  font-size:.72rem;color:rgba(255,255,255,.66);margin-bottom:20px}
.crumb a{color:rgba(255,255,255,.86)}
.crumb a:hover{color:#CFE0FF}
.art-cat{display:inline-block;font-family:var(--f-data);font-size:.6rem;letter-spacing:.2em;
  text-transform:uppercase;padding:7px 14px;border-radius:999px;color:#fff;margin-bottom:18px;
  background:linear-gradient(100deg,#3B82F6,#1D4ED8);box-shadow:0 8px 20px -10px #1D4ED8}
.art-hero h1{font-size:clamp(1.9rem,4.4vw,3.1rem);line-height:1.26;letter-spacing:-.015em}
.art-hero h1 em{font-style:normal;
  background:linear-gradient(96deg,#FFFFFF,#CFE0FF 52%,#B3A8FF);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.art-lede{color:rgba(255,255,255,.88);font-size:1.1rem;line-height:1.9;margin-top:18px;max-width:62ch}
.art-meta{display:flex;flex-wrap:wrap;gap:10px 22px;align-items:center;margin-top:26px;
  font-family:var(--f-data);font-size:.78rem;color:rgba(255,255,255,.75)}
.art-meta .who{display:flex;align-items:center;gap:10px}
.art-meta img{width:38px;height:38px;border-radius:50%;
  box-shadow:0 0 0 2px rgba(255,255,255,.35)}
.art-meta b{color:#fff;font-family:var(--f-display);font-weight:600;font-size:.9rem}
.art-meta span::before{content:"";display:inline-block;width:5px;height:5px;border-radius:50%;
  background:rgba(255,255,255,.4);margin-inline-end:9px;vertical-align:3px}

.art-wrap{background:linear-gradient(180deg,#F7F9FD 0%,#F3F5FA 100%);padding:0 0 90px}
.art-cover{max-width:1060px;margin:-60px auto 0;position:relative;z-index:5;padding-inline:22px}
.art-cover img{width:100%;border-radius:22px;box-shadow:0 30px 70px -26px rgba(6,15,43,.5)}
.art-grid{max-width:1060px;margin:44px auto 0;padding-inline:22px;
  display:grid;grid-template-columns:1fr 268px;gap:44px;align-items:start}

/* สารบัญ */
.toc{position:sticky;top:104px;padding:22px 20px;border-radius:18px;background:#fff;
  border:1px solid #E9EDF3;box-shadow:0 20px 44px -26px rgba(17,32,61,.28)}
.toc h4{font-family:var(--f-data);font-size:.66rem;letter-spacing:.2em;text-transform:uppercase;
  color:#6B7A82;margin-bottom:14px}
.toc ol{list-style:none;margin:0;padding:0;counter-reset:toc;display:grid;gap:2px;
  max-height:60vh;overflow:auto}
.toc a{display:block;padding:8px 10px;border-radius:9px;font-size:.86rem;line-height:1.5;
  color:#41525A;counter-increment:toc;transition:background .2s,color .2s}
.toc a::before{content:counter(toc,decimal-leading-zero)" ";font-family:var(--f-data);
  font-size:.7rem;color:#A9B4BE;margin-inline-end:6px}
.toc a:hover{background:rgba(59,130,246,.09);color:#1D4ED8}
.toc a.on{background:linear-gradient(100deg,#3B82F6,#1D4ED8);color:#fff}
.toc a.on::before{color:rgba(255,255,255,.7)}

/* เนื้อหา */
.art-body{font-size:1.08rem;line-height:1.95;color:#2C3B42}
.art-body > *+*{margin-top:1.2em}
.art-body h2{font-size:clamp(1.42rem,2.4vw,1.85rem);line-height:1.4;margin-top:2em;
  color:var(--ink);scroll-margin-top:110px;position:relative;padding-inline-start:18px}
.art-body h2::before{content:"";position:absolute;inset-inline-start:0;top:.18em;bottom:.18em;
  width:5px;border-radius:3px;background:linear-gradient(180deg,#3B82F6,#1D4ED8)}
.art-body h3{font-size:1.16rem;margin-top:1.7em;color:var(--ink)}
.art-body strong,.art-body b{font-weight:600;color:var(--ink)}
.art-body a{color:#1D4ED8;text-decoration:underline;text-underline-offset:3px;
  text-decoration-thickness:1px}
.art-body a:hover{color:#C2410C}
.art-body ul,.art-body ol{padding-inline-start:1.2em;display:grid;gap:.55em}
.art-body li{padding-inline-start:.2em}
.art-body ul li::marker{color:#3B82F6}
.art-body img{border-radius:16px;box-shadow:0 18px 40px -22px rgba(17,32,61,.4)}
.art-body figure{margin:0}
.art-body figcaption{font-family:var(--f-data);font-size:.76rem;color:#6B7A82;
  text-align:center;margin-top:10px}

/* กล่องเน้น */
.callout{padding:20px 22px;border-radius:16px;border:1px solid;position:relative}
.callout__t{display:block;font-family:var(--f-display);font-weight:700;font-size:.98rem;
  margin-bottom:6px}
.callout p{margin-top:0;font-size:1rem}
.callout--key{background:linear-gradient(120deg,rgba(59,130,246,.1),rgba(59,130,246,.03));
  border-color:rgba(59,130,246,.32)}
.callout--key .callout__t{color:#1D4ED8}
.callout--tip{background:linear-gradient(120deg,rgba(16,185,129,.1),rgba(16,185,129,.03));
  border-color:rgba(16,185,129,.32)}
.callout--tip .callout__t{color:#047857}
.callout--warn{background:linear-gradient(120deg,rgba(245,158,11,.12),rgba(245,158,11,.04));
  border-color:rgba(245,158,11,.36)}
.callout--warn .callout__t{color:#B45309}

/* การ์ดขั้นตอน */
.stepgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.stepbox{padding:22px 20px;border-radius:18px;background:#fff;border:1px solid #E9EDF3;
  box-shadow:0 16px 36px -26px rgba(17,32,61,.4);transition:transform .28s ease}
.stepbox:hover{transform:translateY(-5px)}
.stepbox b{display:block;font-family:var(--f-display);font-size:1.02rem;margin:12px 0 6px}
.stepbox p{font-size:.94rem;line-height:1.75;margin:0;color:#33444B}
.stepbox .n{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;color:#fff;
  font-family:var(--f-display);font-weight:700;font-size:1rem}
.stepbox:nth-child(1) .n{background:linear-gradient(145deg,#3B82F6,#1D4ED8);box-shadow:0 8px 18px -9px #1D4ED8}
.stepbox:nth-child(2) .n{background:linear-gradient(145deg,#A855F7,#7C3AED);box-shadow:0 8px 18px -9px #7C3AED}
.stepbox:nth-child(3) .n{background:linear-gradient(145deg,#10B981,#047857);box-shadow:0 8px 18px -9px #047857}

/* ตารางเปรียบเทียบ */
.cmp{width:100%;border-collapse:separate;border-spacing:0;font-size:.96rem;
  border-radius:16px;overflow:hidden;box-shadow:0 18px 40px -26px rgba(17,32,61,.4)}
.cmp th,.cmp td{padding:14px 16px;text-align:start;background:#fff;
  border-bottom:1px solid #EEF1F5}
.cmp thead th{background:linear-gradient(100deg,#0E1E52,#1B3488);color:#fff;
  font-family:var(--f-data);font-size:.74rem;letter-spacing:.1em;text-transform:uppercase}
.cmp tbody tr:last-child td{border-bottom:0}
.cmp td:first-child{font-weight:600;color:var(--ink)}

/* CTA ในบทความ */
.art-cta{padding:30px 28px;border-radius:22px;color:#fff;text-align:center;position:relative;
  overflow:hidden;
  background:
    radial-gradient(420px 260px at 82% 8%, rgba(255,138,0,.24), transparent 62%),
    linear-gradient(150deg,#081226,#0E1E52 60%,#1B3488)}
.art-cta h3{color:#fff;font-size:1.3rem}
.art-cta p{color:rgba(255,255,255,.85);margin:10px auto 20px;max-width:52ch;font-size:1rem}

/* ผู้เขียน + บทความที่เกี่ยวข้อง */
.author{display:flex;gap:18px;align-items:center;padding:22px;border-radius:20px;
  background:#fff;border:1px solid #E9EDF3;margin-top:48px;
  box-shadow:0 18px 44px -28px rgba(17,32,61,.35)}
.author img{width:74px;height:74px;border-radius:50%;flex:0 0 auto;
  box-shadow:0 0 0 3px rgba(59,130,246,.22)}
.author b{display:block;font-family:var(--f-display);font-size:1.06rem}
.author small{font-family:var(--f-data);font-size:.72rem;color:#6B7A82}
.author p{font-size:.94rem;color:#33444B;margin-top:8px;line-height:1.75}

.related{margin-top:52px}
.related h3{font-size:1.2rem;margin-bottom:18px}
.relgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.relcard{display:block;padding:20px;border-radius:18px;background:#fff;border:1px solid #E9EDF3;
  box-shadow:0 16px 36px -28px rgba(17,32,61,.4);transition:transform .28s ease,border-color .28s}
.relcard:hover{transform:translateY(-5px);border-color:#3B82F6}
.relcard small{font-family:var(--f-data);font-size:.66rem;letter-spacing:.14em;
  text-transform:uppercase;color:#1D4ED8}
.relcard b{display:block;font-family:var(--f-display);font-size:.99rem;margin-top:8px;
  line-height:1.5;color:var(--ink)}

@media(max-width:1000px){
  .art-grid{grid-template-columns:1fr;gap:28px}
  .toc{position:static;max-height:none}
  .toc ol{max-height:none}
  .stepgrid,.relgrid{grid-template-columns:1fr}
}
@media(max-width:820px){
  .art-hero{margin-top:-68px;padding:104px 0 76px}
  .art-cover{margin-top:-42px}
  .art-body{font-size:1.03rem}
}




/* ============================================================
   บล็อกกราฟิกสำหรับบทความ (ใช้ซ้ำได้ทุกบท)
   ============================================================ */
.a-stat{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:26px 0}
.a-stat div{padding:20px 18px;border-radius:18px;text-align:center;color:#fff;
  background:linear-gradient(150deg,var(--k1,#3B82F6),var(--k2,#1D4ED8));
  box-shadow:0 16px 34px -20px var(--k2,#1D4ED8)}
.a-stat b{display:block;color:#fff;font-family:var(--f-display);font-weight:700;font-size:1.9rem;
  line-height:1.15;font-variant-numeric:tabular-nums;
  text-shadow:0 2px 10px rgba(0,0,0,.28)}
.a-stat small{display:block;font-family:var(--f-data);font-size:.7rem;letter-spacing:.06em;
  color:rgba(255,255,255,.92);margin-top:6px;line-height:1.55}
.a-stat div:nth-child(2){--k1:#A855F7;--k2:#7C3AED}
.a-stat div:nth-child(3){--k1:#10B981;--k2:#047857}

.a-vs{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:26px 0}
.a-vs__col{padding:24px 22px;border-radius:20px;border:1.5px solid}
.a-vs__col h4{font-family:var(--f-display);font-size:1.05rem;margin-bottom:12px;
  display:flex;align-items:center;gap:9px}
.a-vs__col h4 span{width:26px;height:26px;border-radius:8px;display:grid;place-items:center;
  color:#fff;font-size:.8rem}
.a-vs__col ul{list-style:none;margin:0;padding:0;display:grid;gap:9px}
.a-vs__col li{position:relative;padding-inline-start:22px;font-size:.94rem;line-height:1.7;color:#33444B}
.a-vs__col li::before{position:absolute;inset-inline-start:0;top:.05em;font-weight:700}
.a-vs--good{background:linear-gradient(150deg,rgba(16,185,129,.09),rgba(16,185,129,.02));
  border-color:rgba(16,185,129,.35)}
.a-vs--good h4{color:#047857}.a-vs--good h4 span{background:linear-gradient(145deg,#10B981,#047857)}
.a-vs--good li::before{content:"✓";color:#10B981}
.a-vs--bad{background:linear-gradient(150deg,rgba(244,63,94,.09),rgba(244,63,94,.02));
  border-color:rgba(244,63,94,.35)}
.a-vs--bad h4{color:#BE123C}.a-vs--bad h4 span{background:linear-gradient(145deg,#F43F5E,#BE123C)}
.a-vs--bad li::before{content:"✕";color:#F43F5E}

.a-check{margin:26px 0;padding:24px 22px;border-radius:20px;background:#fff;
  border:1px solid #E9EDF3;box-shadow:0 18px 42px -30px rgba(17,32,61,.4)}
.a-check h4{font-family:var(--f-display);font-size:1.06rem;margin-bottom:14px;color:var(--ink)}
.a-check ol{list-style:none;margin:0;padding:0;counter-reset:ck;display:grid;gap:12px}
.a-check li{position:relative;padding-inline-start:40px;counter-increment:ck;
  font-size:.96rem;line-height:1.75;color:#2F3F46}
.a-check li::before{content:counter(ck);position:absolute;inset-inline-start:0;top:0;
  width:27px;height:27px;border-radius:9px;display:grid;place-items:center;color:#fff;
  font-family:var(--f-data);font-size:.78rem;
  background:linear-gradient(145deg,#3B82F6,#1D4ED8);box-shadow:0 6px 14px -7px #1D4ED8}
.a-check li b{color:var(--ink)}

.a-quote{margin:26px 0;padding:24px 26px;border-radius:20px;position:relative;
  background:linear-gradient(150deg,#0E1E52,#1B3488);color:#fff;
  box-shadow:0 24px 54px -30px rgba(14,30,82,.9)}
.a-quote p{color:rgba(255,255,255,.94);font-size:1.06rem;line-height:1.85;margin:0}
.a-quote cite{display:block;font-family:var(--f-data);font-size:.74rem;font-style:normal;
  color:rgba(255,255,255,.62);margin-top:12px}

@media(max-width:700px){
  .a-stat{grid-template-columns:1fr}
  .a-vs{grid-template-columns:1fr}
}


/* ============================================================
   FIX คอนทราสต์: ตัวหนาบนพื้นสีเข้ม/พื้นไล่เฉด
   สาเหตุเดิม: .art-body b ตั้งสีเข้มแบบเจาะจง ทับสีขาวที่ตั้งไว้ที่กล่องแม่
   (กฎที่ชี้ตรงตัว element ชนะการสืบทอดสีเสมอ)
   ============================================================ */
.art-body .a-stat b,
.art-body .a-stat strong,
.art-body .a-quote b,
.art-body .a-quote strong,
.art-body .art-cta b,
.art-body .art-cta strong,
.art-body .callout--dark b,
.a-stat b,.a-stat strong,
.a-quote b,.a-quote strong,
.art-cta b,.art-cta strong{color:#fff}

.art-body .a-stat small,
.art-body .a-quote cite,
.art-body .art-cta small{color:rgba(255,255,255,.9)}

/* การ์ดตัวเลข: เพิ่มมิติและอ่านง่ายขึ้น */
.a-stat div{position:relative;overflow:hidden;
  box-shadow:0 1px 0 rgba(255,255,255,.28) inset, 0 18px 38px -20px var(--k2,#1D4ED8)}
.a-stat div::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(120% 80% at 20% 0%, rgba(255,255,255,.22), transparent 62%)}
.a-stat div > *{position:relative;z-index:2}

/* กล่องเน้นบนพื้นเข้ม (ถ้ามีในอนาคต) */
.callout--dark{background:linear-gradient(150deg,#0E1E52,#1B3488);border-color:rgba(255,255,255,.2)}
.callout--dark .callout__t{color:#FFE9A8}
.callout--dark p,.callout--dark li{color:rgba(255,255,255,.9)}