:root {
  --vm-blog-accent: #38bdf8;
  --vm-blog-accent-soft: #7c6cff;
  --vm-blog-accent-deep: #2563eb;
  --vm-blog-bg: #f6f8fc;
  --vm-blog-surface: #ffffff;
  --vm-blog-ink: #1c2430;
  --vm-blog-muted: #667085;
  --vm-blog-line: #e6ebf2;
  --vm-blog-line-strong: #d8e0ea;
  --vm-blog-shadow: 0 14px 36px rgba(15, 23, 42, 0.06);
  --vm-blog-shadow-soft: 0 8px 24px rgba(15, 23, 42, 0.04);

  /* 見た目の基準幅 */
  --vm-blog-max: 980px;

  /* main.css の .container が左右20px padding を持つ前提 */
  --vm-blog-shell: calc(var(--vm-blog-max) + 40px);

  /* 本文の左右余白を全ブロックで揃える */
  --vm-blog-content-pad-x: 38px;
  --vm-blog-content-pad-x-sm: 18px;
}

.vm-blog {
  background: var(--vm-blog-bg);
  color: var(--vm-blog-ink);
  padding-bottom: 88px;
}

/* ==============================
   共通の外枠幅を統一
============================== */
.vm-blog-hero > .container,
.vm-blog-toc > .container,
.vm-blog-section > .container,
.vm-blog-cta > .container,
.vm-blog-related > .container {
  max-width: var(--vm-blog-shell);
}

/* ==============================
   Hero
============================== */
.vm-blog-hero {
  padding: 24px 0 22px;
  background: linear-gradient(180deg, #ffffff 0%, #f8fbff 72%, #f6f8fc 100%);
  border-bottom: 1px solid rgba(230, 235, 242, 0.9);
}

.vm-blog-breadcrumb {
  width: 100%;
  max-width: var(--vm-blog-max);
  margin: 0 auto 22px;
  padding-left: 0;
  padding-right: 0;
}

.vm-blog-breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 10px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.82rem;
  color: var(--vm-blog-muted);
}

.vm-blog-breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.vm-blog-breadcrumb__item:not(:last-child)::after {
  content: "/";
  color: #98a2b3;
}

.vm-blog-breadcrumb__item a {
  color: inherit;
  text-decoration: none;
}

.vm-blog-breadcrumb__item a:hover {
  color: var(--vm-blog-accent-deep);
}

.vm-blog-hero__inner {
  width: 100%;
  max-width: var(--vm-blog-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 0;
  padding-right: 0;
  box-sizing: border-box;

  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.vm-blog-hero__text,
.vm-blog-hero__media,
.vm-blog-hero__lead {
  width: 100%;
  max-width: none;
  margin: 0;
}

.vm-blog-hero__eyebrow {
  font-size: 0.76rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--vm-blog-accent-deep);
  font-weight: 700;
  margin: 0 0 12px;
}

.vm-blog-hero__title {
  font-size: clamp(2rem, 4.8vw, 2.9rem);
  line-height: 1.28;
  letter-spacing: 0.01em;
  margin: 0 0 16px;
  font-weight: 800;
  color: var(--vm-blog-ink);
}

.vm-blog-hero__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin-bottom: 18px;
  font-size: 0.86rem;
  color: var(--vm-blog-muted);
}

.vm-blog-pill {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 14px;
  border: none;
  border-radius: 999px;
  background: #efe7ff;
  color: #7c3aed;
  font-weight: 700;
  line-height: 1;
  box-shadow: none;
}

.vm-blog-tag {
  display: inline-flex;
  align-items: center;
  min-height: auto;
  padding: 0;
  border: none;
  border-radius: 0;
  background: transparent;
  color: #7c3aed;
  font-weight: 700;
  line-height: 1.4;
  text-decoration: none;
  box-shadow: none;
}

.vm-blog-tag:hover {
  color: #7c3aed;
  text-decoration: none;
}

.vm-blog-meta-date {
  display: inline-flex;
  align-items: center;
  color: var(--vm-blog-muted);
  font-weight: 500;
  line-height: 1.4;
}

.vm-blog-hero__lead {
  color: #475467;
  font-size: 1.03rem;
  line-height: 1.95;
}

.vm-blog-hero__media {
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--vm-blog-line);
  background: #fff;
  box-shadow: var(--vm-blog-shadow-soft);
  position: relative;
}

.vm-blog-hero__media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  height: auto;
  display: block;
  object-fit: cover;
}

.vm-blog-hero__media-placeholder {
  display: block;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #f5f9ff 0%, #edf5ff 100%);
}

/* ==============================
   TOC
============================== */
.vm-blog-toc {
  padding: 18px 0 0;
}

.vm-blog-toc__inner {
  width: 100%;
  max-width: var(--vm-blog-max);
  margin-left: auto;
  margin-right: auto;
  box-sizing: border-box;

  background: var(--vm-blog-surface);
  border: 1px solid var(--vm-blog-line);
  border-radius: 14px;
  padding: 16px 18px;
  box-shadow: var(--vm-blog-shadow-soft);
}

.vm-blog-toc__title {
  font-size: 1.18rem;
  font-weight: 800;
  text-align: center;
  margin: 0 0 10px;
  color: var(--vm-blog-ink);
}

.vm-blog-toc__list,
.vm-blog-toc__sublist {
  list-style: none;
  margin: 0;
  padding: 0;
}

.vm-blog-toc__list {
  display: grid;
  gap: 2px;
}

.vm-blog-toc__item + .vm-blog-toc__item {
  border-top: 1px solid var(--vm-blog-line);
  margin-top: 7px;
  padding-top: 7px;
}

.vm-blog-toc__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 2px 0;
  text-decoration: none;
  color: var(--vm-blog-ink);
  line-height: 1.55;
}

.vm-blog-toc__link--sub {
  padding-left: 18px;
  font-size: 0.92rem;
  color: #4b5565;
}

.vm-blog-toc__num {
  min-width: 2em;
  color: var(--vm-blog-accent-deep);
  font-weight: 700;
  letter-spacing: 0.01em;
}

.vm-blog-toc__text {
  flex: 1;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.vm-blog-toc__link:hover .vm-blog-toc__text {
  color: inherit;
  border-bottom-color: rgba(124, 108, 255, 0.35);
}

.vm-blog-toc__sublist {
  margin-top: 2px;
  display: grid;
  gap: 0;
}

/* ==============================
   Body
============================== */
.vm-blog-section {
  padding: 26px 0 0;
}

.vm-blog-body {
  width: 100%;
  max-width: var(--vm-blog-max);
  margin-left: auto;
  margin-right: auto;
  box-sizing: border-box;

  background: var(--vm-blog-surface);
  border: 1px solid var(--vm-blog-line);
  border-radius: 16px;
  padding: 34px var(--vm-blog-content-pad-x) 40px;
  box-shadow: var(--vm-blog-shadow);
}

.vm-blog-body > *:first-child {
  margin-top: 0;
}

.vm-blog-body p {
  margin: 0 0 18px;
  color: #344054;
  font-size: 1rem;
  line-height: 2;
  letter-spacing: 0.01em;
}

.vm-blog-body ul,
.vm-blog-body ol {
  margin: 0 0 22px;
  padding-left: 1.4em;
  color: #344054;
}

.vm-blog-body li {
  margin-bottom: 10px;
  line-height: 1.9;
}

.vm-blog-body li::marker {
  color: var(--vm-blog-accent-deep);
}

.vm-blog-body a {
  color: var(--vm-blog-accent-deep);
  text-decoration: underline;
  text-underline-offset: 0.16em;
}

.vm-blog-body a:hover {
  text-decoration-thickness: 2px;
}

.vm-blog-body strong {
  font-weight: 700;
  color: var(--vm-blog-ink);
  background: linear-gradient(transparent 58%, rgba(250, 204, 21, 0.55) 58%);
  padding: 0 0.08em;
}

.vm-blog-body .is-marker {
  font-weight: 700;
  color: var(--vm-blog-ink);
  background: linear-gradient(transparent 58%, rgba(250, 204, 21, 0.55) 58%);
  padding: 0 0.08em;
}

.vm-blog-highlight {
  display: none;
}

.vm-blog-body .is-note {
  margin: 22px 0;
  padding: 16px 18px;
  background: #f8fafc;
  border: 1px solid var(--vm-blog-line);
  border-radius: 12px;
  color: #475467;
  line-height: 1.85;
}

.vm-blog-body .is-check {
  margin: 22px 0;
  padding: 16px 18px;
  background: #fbfcfe;
  border: 1px solid var(--vm-blog-line);
  border-radius: 12px;
}

.vm-blog-body .is-check ul {
  margin-bottom: 0;
}

/* ==============================
   Headings
============================== */
.vm-blog-heading {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0;
  color: var(--vm-blog-ink);
}

.vm-blog-heading__num {
  flex: 0 0 auto;
  font-weight: 800;
  color: var(--vm-blog-accent-deep);
  line-height: 1.4;
}

.vm-blog-heading__text {
  flex: 1;
  min-width: 0;
}

.vm-blog-heading--section {
  font-size: clamp(1.42rem, 2.8vw, 1.82rem);
  line-height: 1.45;
  margin: 82px 0 22px;
  padding: 0 0 12px;
  font-weight: 800;
  border-bottom: none;
}

.vm-blog-heading--section::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  border-radius: 999px;
  background: linear-gradient(
    90deg,
    var(--vm-blog-accent-deep) 0%,
    var(--vm-blog-accent) 52%,
    rgba(124, 108, 255, 0.35) 100%
  );
}

.vm-blog-heading--sub {
  font-size: 1.16rem;
  line-height: 1.6;
  margin: 34px 0 14px;
  padding: 0 0 10px;
  font-weight: 700;
  color: #243042;
  border-bottom: none;
}

.vm-blog-heading--sub .vm-blog-heading__num {
  font-size: 0.98em;
  color: #0ea5e9;
}

.vm-blog-heading--sub::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  border-radius: 999px;
  background: linear-gradient(
    90deg,
    rgba(14, 165, 233, 0.9) 0%,
    rgba(56, 189, 248, 0.72) 56%,
    rgba(124, 108, 255, 0.18) 100%
  );
}

.vm-blog-body h2.vm-blog-heading,
.vm-blog-body h3.vm-blog-heading {
  border-bottom: none;
}

.vm-blog-body p + .vm-blog-heading--section {
  margin-top: 72px;
}

.vm-blog-body p + .vm-blog-heading--sub {
  margin-top: 34px;
}

/* ==============================
   CTA
============================== */
.vm-blog-cta {
  padding: 52px 0 20px;
}

.vm-blog-cta__inner {
  width: 100%;
  max-width: var(--vm-blog-max);
  margin-left: auto;
  margin-right: auto;
  box-sizing: border-box;

  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: 20px;
  align-items: center;
  background: #ffffff;
  border: 1px solid var(--vm-blog-line);
  border-radius: 18px;
  padding: 30px var(--vm-blog-content-pad-x);
  box-shadow: var(--vm-blog-shadow-soft);
}

.vm-blog-cta__eyebrow {
  font-size: 0.74rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--vm-blog-accent-deep);
  margin: 0 0 10px;
  font-weight: 700;
}

.vm-blog-cta__title {
  font-size: clamp(1.35rem, 3vw, 1.9rem);
  line-height: 1.4;
  margin: 0 0 10px;
  color: var(--vm-blog-ink);
}

.vm-blog-cta__message {
  color: #475467;
  margin: 0 0 18px;
  line-height: 1.9;
}

.vm-blog-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.vm-blog-cta__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 18px;
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.vm-blog-cta__btn:hover {
  transform: translateY(-1px);
}

.vm-blog-cta__btn--line {
  color: #fff;
  background: linear-gradient(135deg, var(--vm-blog-accent-deep), var(--vm-blog-accent));
  box-shadow: 0 10px 24px rgba(56, 189, 248, 0.22);
}

.vm-blog-cta__btn--contact {
  color: var(--vm-blog-accent-deep);
  border: 1px solid rgba(56, 189, 248, 0.35);
  background: #fff;
}

.vm-blog-cta__qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: var(--vm-blog-muted);
  font-size: 0.85rem;
  margin-top: 0;
}

.vm-blog-cta__qr img {
  width: min(180px, 60vw);
  height: auto;
  border-radius: 12px;
  border: 1px solid var(--vm-blog-line);
  background: #fff;
}

/* ==============================
   Related
============================== */
.vm-blog-related {
  padding: 46px 0 12px;
}

.vm-blog-related__title {
  width: 100%;
  max-width: var(--vm-blog-max);
  margin: 0 auto 18px;
  font-size: 1.35rem;
  line-height: 1.4;
  color: var(--vm-blog-ink);
}

.vm-blog-related .vm-blog-grid {
  gap: 20px;
}

.vm-blog-related__grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.vm-blog-related__empty {
  color: var(--vm-blog-muted);
}

/* ==============================
   Related cards
============================== */
.vm-blog-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--vm-blog-line);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--vm-blog-shadow-soft);
}

.vm-blog-card__thumb {
  position: relative;
  display: block;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #f4f8ff 0%, #edf5ff 100%);
}

.vm-blog-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.vm-blog-card__thumb-placeholder {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #f4f8ff 0%, #edf5ff 100%);
}

.vm-blog-card__body {
  padding: 16px 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.vm-blog-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 0.78rem;
  color: var(--vm-blog-muted);
}

.vm-blog-card__meta-left {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.vm-blog-card__pill {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.1);
  color: var(--vm-blog-accent-deep);
  font-weight: 700;
}

.vm-blog-card__tags {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 0.75rem;
}

.vm-blog-card__tag {
  font-size: 0.75rem;
  color: #667085;
  font-weight: 600;
  text-decoration: none;
}

.vm-blog-card__tag:hover {
  color: var(--vm-blog-accent-deep);
  text-decoration: underline;
}

.vm-blog-card__title {
  font-size: 1rem;
  margin: 0;
  line-height: 1.6;
  color: var(--vm-blog-ink);
}

.vm-blog-card__title a {
  text-decoration: none;
  color: inherit;
}

.vm-blog-card__desc {
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--vm-blog-muted);
  margin: 0;
}

/* ==============================
   Note / back
============================== */
.vm-blog-note {
  color: var(--vm-blog-muted);
  margin-bottom: 14px;
}

.vm-blog-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--vm-blog-accent-deep);
  font-weight: 700;
  text-decoration: none;
}

/* ==============================
   Responsive
============================== */
@media (max-width: 980px) {
  .vm-blog-hero {
    padding: 20px 0 20px;
  }

  .vm-blog-related__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .vm-blog-body {
    padding: 28px 28px 34px;
  }

  .vm-blog-breadcrumb,
  .vm-blog-hero__inner,
  .vm-blog-cta__inner {
    padding-left: 28px;
    padding-right: 28px;
  }
}

@media (max-width: 768px) {
  .vm-blog-hero__title {
    font-size: clamp(1.8rem, 7vw, 2.3rem);
    line-height: 1.34;
  }

  .vm-blog-hero__lead {
    font-size: 0.97rem;
    line-height: 1.9;
  }

  .vm-blog-toc__inner,
  .vm-blog-body {
    border-radius: 14px;
  }

  .vm-blog-heading--section {
    font-size: 1.32rem;
  }

  .vm-blog-heading--sub {
    font-size: 1.08rem;
  }
}

@media (max-width: 640px) {
  .vm-blog {
    padding-bottom: 72px;
  }

  .vm-blog-hero {
    padding: 16px 0 18px;
  }

  .vm-blog-breadcrumb {
    margin-bottom: 16px;
    padding-left: var(--vm-blog-content-pad-x-sm);
    padding-right: var(--vm-blog-content-pad-x-sm);
  }

  .vm-blog-breadcrumb__list {
    font-size: 0.76rem;
    gap: 6px 8px;
  }

  .vm-blog-hero__inner {
    padding-left: var(--vm-blog-content-pad-x-sm);
    padding-right: var(--vm-blog-content-pad-x-sm);
  }

  .vm-blog-hero__eyebrow {
    margin-bottom: 10px;
  }

  .vm-blog-hero__title {
    margin-bottom: 14px;
  }

  .vm-blog-hero__meta {
    gap: 8px 12px;
    margin-bottom: 14px;
    font-size: 0.8rem;
  }

  .vm-blog-pill {
    min-height: 28px;
    padding: 0 12px;
  }

  .vm-blog-hero__lead {
    font-size: 0.95rem;
    line-height: 1.85;
  }

  .vm-blog-toc {
    padding-top: 16px;
  }

  .vm-blog-toc__inner {
    padding: 14px 14px;
  }

  .vm-blog-toc__title {
    font-size: 1.06rem;
    margin-bottom: 8px;
  }

  .vm-blog-toc__link {
    gap: 6px;
    padding: 1px 0;
    font-size: 0.93rem;
  }

  .vm-blog-toc__link--sub {
    padding-left: 12px;
    font-size: 0.89rem;
  }

  .vm-blog-section {
    padding-top: 18px;
  }

  .vm-blog-body {
    padding: 22px var(--vm-blog-content-pad-x-sm) 28px;
  }

  .vm-blog-body p {
    font-size: 0.96rem;
    line-height: 1.9;
    margin-bottom: 16px;
  }

  .vm-blog-heading--section {
    font-size: 1.24rem;
    margin: 46px 0 16px;
    padding-bottom: 12px;
  }

  .vm-blog-heading--sub {
    font-size: 1.04rem;
    margin: 26px 0 10px;
    padding-bottom: 9px;
  }

  .vm-blog-body ul,
  .vm-blog-body ol {
    padding-left: 1.25em;
    margin-bottom: 18px;
  }

  .vm-blog-body .is-note,
  .vm-blog-body .is-check {
    padding: 14px 14px;
    border-radius: 10px;
  }

  .vm-blog-related {
    padding-top: 38px;
  }

  .vm-blog-related__grid {
    grid-template-columns: 1fr;
  }

  .vm-blog-cta {
    padding-top: 42px;
  }

  .vm-blog-cta__inner {
    padding: 22px var(--vm-blog-content-pad-x-sm);
    border-radius: 16px;
  }

  .vm-blog-cta__actions {
    flex-direction: column;
  }

  .vm-blog-cta__btn {
    width: 100%;
  }

  .vm-blog-cta__qr {
    margin-top: 6px;
  }
}