/* Premium editorial guide — homepage only, isolated from existing site modules. */
#article .premium-article {
  --guide-ink: #183149;
  --guide-muted: #5b7288;
  --guide-line: #dae5ef;
  --guide-blue: #155fa4;
  box-sizing: border-box;
  position: relative;
  overflow: hidden;
  padding: 0;
  border: 1px solid #d9e5ef;
  border-radius: 27px;
  background: #f7fafd;
  box-shadow: 0 24px 60px rgba(11, 43, 75, .12);
  font-family: "Noto Sans Thai", Tahoma, "Segoe UI", sans-serif;
  color: var(--guide-ink);
  line-height: 1.65;
}
.premium-article *, .premium-article *::before, .premium-article *::after { box-sizing: border-box; }
.premium-article :focus-visible { outline: 2px solid #247ec9; outline-offset: 3px; }
.premium-article a { text-decoration: none; }
.premium-article a:hover { text-decoration: none; }

/* Editorial cover: rich dark-blue palette with restrained gold accents. */
.premium-article .guide-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(265px, .75fr);
  align-items: stretch;
  gap: clamp(20px, 3vw, 45px);
  overflow: hidden;
  padding: clamp(25px, 3.6vw, 44px);
  background:
    radial-gradient(ellipse 45% 95% at 103% -15%, rgba(66, 137, 189, .35) 0%, transparent 78%),
    radial-gradient(ellipse 42% 88% at -18% 115%, rgba(15, 78, 135, .48) 0%, transparent 75%),
    linear-gradient(118deg, #07182a 0%, #13334e 58%, #0d253a 100%);
  color: #f7fbff;
}
.premium-article .guide-hero::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, #9b7649, #f1d09b 52%, #9a7547);
}
.premium-article .guide-hero::after {
  content: "";
  position: absolute;
  width: 500px;
  height: 500px;
  top: -320px;
  left: 40%;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,.055);
  box-shadow: 0 0 0 50px rgba(255,255,255,.025), 0 0 0 100px rgba(255,255,255,.014);
  pointer-events: none;
}
.premium-article .guide-hero__main,
.premium-article .guide-hero__side { z-index: 1; min-width: 0; position: relative; }
.premium-article .guide-hero__eyebrow,
.premium-article .guide-section__eyebrow,
.premium-article .guide-cta__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #f1ca8c;
  font-size: 10px;
  line-height: 1.45;
  letter-spacing: .19em;
  font-weight: 800;
}
.premium-article .guide-hero__spark {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #f1ca8c;
  box-shadow: 0 0 0 5px rgba(241,202,140,.13);
}
.premium-article .guide-hero h2 {
  max-width: 820px;
  margin: 15px 0 13px;
  color: #fff;
  font-size: clamp(26px, 3.25vw, 40px);
  line-height: 1.31;
  font-weight: 800;
  letter-spacing: -.035em;
  text-wrap: balance;
}
.premium-article .guide-hero h2 span { color: #f3d5a2; }
.premium-article .guide-hero p.guide-hero__lead {
  max-width: 700px;
  margin: 0;
  color: #d1deea;
  font-size: 14.5px;
  line-height: 1.88;
}
.premium-article .guide-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}
.premium-article .guide-hero__tags span {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 5px 11px;
  border: 1px solid rgba(215, 231, 247, .18);
  border-radius: 999px;
  background: rgba(235, 246, 255, .055);
  color: #d6e5f2;
  font-size: 11px;
  line-height: 1.2;
  font-weight: 700;
}
.premium-article .guide-hero__side {
  align-self: center;
  padding: 19px 21px;
  border: 1px solid rgba(230, 243, 255, .16);
  border-radius: 17px;
  background: rgba(235, 246, 255, .067);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.06), 0 16px 26px rgba(0,0,0,.10);
  backdrop-filter: blur(6px);
}
.premium-article p.guide-hero__side-label {
  margin: 0 0 13px;
  color: #f2d19b;
  font-size: 13px;
  font-weight: 800;
  line-height: 1.45;
}
.premium-article .guide-hero__side ul { display: grid; gap: 8px; padding: 0; margin: 0; list-style: none; }
.premium-article .guide-hero__side li {
  position: relative;
  padding-left: 21px;
  color: #e3edf5;
  font-size: 12.5px;
  line-height: 1.5;
}
.premium-article .guide-hero__side li::before {
  content: "✓";
  position: absolute;
  top: 0;
  left: 0;
  color: #8ee1bc;
  font-weight: 800;
}
.premium-article .guide-hero__side-foot {
  display: block;
  margin-top: 16px;
  padding-top: 11px;
  border-top: 1px solid rgba(230,243,255,.11);
  color: #a5c2d8;
  font-size: 10.5px;
}

.premium-article .guide-body {
  display: grid;
  gap: 25px;
  padding: clamp(18px, 3vw, 31px);
}
.premium-article .guide-toc {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  padding: 12px 15px;
  border: 1px solid #d6e3f0;
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 7px 20px rgba(12, 59, 105, .045);
}
.premium-article .guide-toc > strong {
  flex: 0 0 auto;
  color: #244660;
  font-size: 12.5px;
  white-space: nowrap;
}
.premium-article .guide-toc__links { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; }
.premium-article .guide-toc__links a {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 5px 9px;
  border-radius: 7px;
  color: #285a89;
  background: #f1f6fc;
  font-size: 11.5px;
  font-weight: 700;
  line-height: 1.2;
  transition: color .2s, background .2s;
}
.premium-article .guide-toc__links a:hover { background: #dcecfb; color: #0b518f; }
.premium-article .guide-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 21px;
  padding: 3px 3px 0;
}
.premium-article .guide-intro p {
  margin: 0;
  color: #455e75;
  font-size: 13.5px;
  line-height: 1.94;
}
.premium-article .guide-intro strong { color: #1b3e5a; }
.premium-article .guide-section { scroll-margin-top: 22px; min-width: 0; }
.premium-article .guide-section__heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 13px;
  flex-wrap: wrap;
  margin-bottom: 15px;
}
.premium-article .guide-section__eyebrow {
  color: #0e71b7;
  letter-spacing: .15em;
  font-size: 10px;
}
.premium-article .guide-section__heading h3 {
  margin: 5px 0 0;
  color: #14324c;
  font-size: clamp(19px, 2.15vw, 25px);
  line-height: 1.32;
  letter-spacing: -.018em;
  font-weight: 800;
}
.premium-article .guide-section__meta {
  flex: 0 0 auto;
  font-size: 11px;
  line-height: 1.5;
  color: #557289;
  background: #e9f2fa;
  padding: 5px 10px;
  border-radius: 7px;
  font-weight: 700;
}

/* Dense but readable two-column editorial steps. */
.premium-article .guide-step-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.premium-article .guide-step {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 18px 19px 15px;
  border: 1px solid #dde7f0;
  border-radius: 15px;
  background: #fff;
  box-shadow: 0 9px 24px rgba(13, 60, 103, .045);
}
.premium-article .guide-step--highlight { border-color: #abcbe5; background: linear-gradient(130deg, #ffffff, #f1f8fe); }
.premium-article .guide-step__number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 32px;
  margin-bottom: 10px;
  border-radius: 10px;
  border: 1px solid #cce0f3;
  background: #edf6ff;
  color: #0d66ad;
  font: 800 12px/1 Tahoma, sans-serif;
}
.premium-article .guide-step--highlight .guide-step__number { background: #176dae; color: #fff; border-color: #176dae; }
.premium-article .guide-step h4 {
  margin: 0 0 7px;
  color: #163b59;
  font-size: 16.5px;
  line-height: 1.4;
  font-weight: 800;
}
.premium-article .guide-step p { margin: 0; font-size: 12.75px; line-height: 1.85; color: #485f73; }
.premium-article .guide-step p.guide-step__tip {
  margin: auto 0 0;
  padding-top: 10px;
  color: #12619a;
  font-size: 11.5px;
  line-height: 1.6;
  font-weight: 700;
}
.premium-article .guide-step__tip::before { content: "•"; color: #e5ae6b; padding-right: 7px; font-weight: 900; }

.premium-article .guide-alert {
  display: flex;
  align-items: flex-start;
  gap: 15px;
  padding: 17px 20px;
  border: 1px solid #f2dbb7;
  border-radius: 14px;
  background: linear-gradient(110deg, #fff9ee 0%, #fffcf5 100%);
  color: #725126;
}
.premium-article .guide-alert__symbol {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 30px;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  color: #774e18;
  background: #f8dfaf;
  font-weight: 900;
}
.premium-article .guide-alert strong { color: #62441e; font-size: 13.5px; }
.premium-article .guide-alert p { margin: 3px 0 0; color: #7b6245; font-size: 12.5px; line-height: 1.75; }

/* Product-specific information table. */
.premium-article .guide-table-wrap { overflow-x: auto; border: 1px solid #dbe6f0; border-radius: 14px; background: #fff; }
.premium-article .guide-table { border-collapse: collapse; width: 100%; min-width: 650px; font-size: 12.5px; line-height: 1.7; color: #455e75; }
.premium-article .guide-table thead { background: #133e5b; color: #fff; }
.premium-article .guide-table thead th { padding: 12px 15px; font-weight: 800; font-size: 12px; text-align: left; border-right: 1px solid rgba(255,255,255,.11); }
.premium-article .guide-table tbody tr:nth-child(even) { background: #f7fafd; }
.premium-article .guide-table tbody tr + tr { border-top: 1px solid #e5edf3; }
.premium-article .guide-table tbody th { font-weight: 800; color: #183f5a; text-align: left; width: 24%; }
.premium-article .guide-table tbody th,
.premium-article .guide-table tbody td { padding: 11px 15px; vertical-align: top; }
.premium-article .guide-table tbody td { width: 38%; }

.premium-article .guide-factor-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 11px; }
.premium-article .guide-factor { min-width: 0; border: 1px solid #dce7f1; background: #fff; border-radius: 14px; padding: 16px; }
.premium-article .guide-factor > span { color: #156ca9; font-size: 10px; font-weight: 800; letter-spacing: .04em; }
.premium-article .guide-factor h4 { margin: 7px 0 5px; color: #163c58; font-size: 14px; font-weight: 800; line-height: 1.45; }
.premium-article .guide-factor p { margin: 0; color: #52697c; font-size: 12.5px; line-height: 1.8; }
.premium-article p.guide-fineprint { margin: 10px 0 0; color: #6c7e90; font-size: 11.5px; line-height: 1.7; }

.premium-article .guide-contact-grid { display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); gap: 12px; }
.premium-article .guide-contact-grid__list,
.premium-article .guide-message { min-width: 0; padding: 17px 19px; border: 1px solid #dce7f1; border-radius: 15px; background: #fff; }
.premium-article p.guide-contact-grid__label,
.premium-article .guide-message__label { margin: 0 0 11px; display: block; color: #164264; font-size: 13px; font-weight: 800; }
.premium-article .guide-contact-grid__list ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.premium-article .guide-contact-grid__list li { position: relative; padding-left: 21px; color: #4b6379; font-size: 12.5px; line-height: 1.55; }
.premium-article .guide-contact-grid__list li::before { content: "✓"; position: absolute; left: 0; top: 0; color: #188462; font-weight: 900; }
.premium-article .guide-message { background: linear-gradient(145deg, #ecf6ff 0%, #f5faff 100%); border-color: #cfe1f1; }
.premium-article .guide-message p { margin: 0 0 9px; font-size: 13px; color: #284a66; line-height: 1.92; }
.premium-article .guide-message small { color: #6c7e90; font-size: 11px; line-height: 1.6; }

/* Native semantic disclosure widgets: keyboard-operable, no JavaScript. */
.premium-article .guide-faq { display: grid; gap: 8px; }
.premium-article .guide-faq details { border: 1px solid #dce7f0; border-radius: 12px; overflow: hidden; background: #fff; }
.premium-article .guide-faq details[open] { border-color: #b6cfe5; background: #fcfdff; }
.premium-article .guide-faq summary {
  position: relative;
  display: block;
  padding: 13px 43px 13px 17px;
  color: #234662;
  font-size: 13.5px;
  font-weight: 800;
  line-height: 1.55;
  cursor: pointer;
  list-style: none;
}
.premium-article .guide-faq summary::-webkit-details-marker { display: none; }
.premium-article .guide-faq summary::marker { content: ""; }
.premium-article .guide-faq summary::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 17px;
  transform: translateY(-50%);
  color: #216ea9;
  font-size: 21px;
  font-weight: 600;
}
.premium-article .guide-faq details[open] summary::after { content: "−"; }
.premium-article .guide-faq details > div { margin: 0 17px; padding: 0 0 13px; border-top: 1px solid #e7eef5; }
.premium-article .guide-faq details p { margin: 10px 0 0; color: #50697d; font-size: 12.5px; line-height: 1.85; }

.premium-article .guide-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 22px;
  margin: 0;
  padding: 23px 25px;
  border-radius: 16px;
  background: linear-gradient(120deg, #13364f, #0e263d);
  color: #fff;
}
.premium-article .guide-cta > div:first-child { min-width: 0; flex: 1 1 340px; }
.premium-article .guide-cta__eyebrow { color: #f0cc98; }
.premium-article .guide-cta h3 { margin: 7px 0 5px; color: #fff; font-size: 19px; font-weight: 800; line-height: 1.4; }
.premium-article .guide-cta p { margin: 0; color: #c8d9e7; font-size: 12.75px; line-height: 1.82; }
.premium-article .guide-cta__actions { display: flex; flex-wrap: wrap; gap: 9px; align-items: center; }
.premium-article a.guide-cta__button { display: inline-flex; align-items: center; justify-content: center; min-height: 39px; padding: 8px 14px; border: 1px solid rgba(255,255,255,.26); border-radius: 10px; color: #fff; font-size: 12px; font-weight: 800; text-align: center; line-height: 1.5; transition: transform .18s, box-shadow .18s, border-color .18s; }
.premium-article a.guide-cta__button--line { color: #103d2b; background: #bdf0d2; border-color: #bdf0d2; }
.premium-article a.guide-cta__button:hover { transform: translateY(-2px); border-color: rgba(255,255,255,.6); box-shadow: 0 9px 17px rgba(0,0,0,.13); }

/* Preserve the existing service-area accordion and service-directory modules. */
.premium-article > .service-area,
.premium-article > .seo-block--services { margin: 18px clamp(18px, 3vw, 31px) 20px; }
.premium-article > .seo-block--services { margin-top: 0; }

@media (max-width: 920px) {
  .premium-article .guide-hero { grid-template-columns: minmax(0, 1fr); gap: 20px; }
  .premium-article .guide-hero__side { max-width: 100%; padding: 15px 19px; }
  .premium-article .guide-hero__side ul { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 7px 15px; }
  .premium-article .guide-intro { gap: 16px; }
  .premium-article .guide-factor-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 680px) {
  #article .premium-article { border-radius: 18px; }
  .premium-article .guide-hero { padding: 23px 20px 21px; }
  .premium-article .guide-hero h2 { font-size: clamp(24px, 6.4vw, 31px); margin: 12px 0 10px; }
  .premium-article .guide-hero p.guide-hero__lead { font-size: 13px; line-height: 1.79; }
  .premium-article .guide-hero__tags { margin-top: 13px; gap: 6px; }
  .premium-article .guide-hero__tags span { font-size: 10.5px; }
  .premium-article .guide-hero__side ul { grid-template-columns: 1fr 1fr; }
  .premium-article .guide-body { gap: 23px; padding: 17px 14px; }
  .premium-article .guide-toc { gap: 9px; padding: 11px 12px; }
  .premium-article .guide-intro { grid-template-columns: 1fr; gap: 9px; }
  .premium-article .guide-step-grid { grid-template-columns: 1fr; gap: 10px; }
  .premium-article .guide-step { padding: 15px; }
  .premium-article .guide-step h4 { font-size: 15.75px; }
  .premium-article .guide-factor-grid { grid-template-columns: 1fr; gap: 9px; }
  .premium-article .guide-contact-grid { grid-template-columns: 1fr; }
  .premium-article .guide-section__heading { align-items: flex-start; }
  .premium-article .guide-section__heading h3 { font-size: 19px; }
  .premium-article .guide-cta { padding: 18px; border-radius: 13px; gap: 13px; }
  .premium-article .guide-cta__actions { width: 100%; }
  .premium-article a.guide-cta__button { flex: 1 1 165px; }
  .premium-article > .service-area,
  .premium-article > .seo-block--services { margin: 12px 14px 17px; }
}
@media (prefers-reduced-motion: reduce) {
  .premium-article a { transition: none !important; }
}

/* The shared service directory uses width:100%; cancel it inside this inset card. */
.premium-article > .seo-block--services { width: auto; }