/* ===== Base ===== */
* { box-sizing: border-box; }
/* 色・フォント・行間・文字サイズは OPTiM Biz Premium サイトのデザインルールに準拠 */
:root { --cta: #fa6b00; --cta-hover: #ff9d53; --primary-hover: #3073b6; --textlink: #0045e6; --textlink-hover: #004386; --shadow-button: rgba(0, 0, 0, .3); }
html { font-family: "Noto Sans JP", "ヒラギノ角ゴ Pro", "Hiragino Kaku Gothic Pro", "Meiryo UI", "メイリオ", Meiryo, "游ゴシック", "Yu Gothic", "游ゴシック体", YuGothic, sans-serif; font-size: 1rem; line-height: 1.75; color: var(--text); background: #fff; }
body { margin: 0; }
@media (max-width: 991px) { body { font-size: .875rem; } }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: .2em; }
img { display: block; max-width: 100%; }
h1, h2, h3 { letter-spacing: 0; }
.skip-link { position: absolute; top: 0; left: -9999px; }
.skip-link:focus { top: 1rem; left: 1rem; z-index: 10; padding: .6rem 1rem; background: #fff; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.wrap { max-width: 1200px; padding: 0 24px; margin: 0 auto; }
main { min-height: 65vh; }

/* 画像プレースホルダー（グレーの四角） */
.ph { display: block; flex-shrink: 0; background: #d5d9df; }
/* アイコン（Google Material Symbols Outlined）。読み込み前に文字名が見えないよう幅を固定 */
.material-symbols-outlined { display: inline-block; flex-shrink: 0; width: 1em; overflow: hidden; font-size: 20px; line-height: 1; vertical-align: middle; user-select: none; }
.icon-arrow, .icon-chevron, .icon-download { font-size: 18px; }
.icon-search { font-size: 24px; }
.icon-topic { font-size: 18px; }
.file-icon { margin-right: 2px; font-size: 15px; vertical-align: -3px; }
.sec-icon { font-size: 30px; color: var(--accent); }
.btn-icon { font-size: 22px; }
.ph-circle { width: 22px; height: 22px; background: #2a2f3a; border-radius: 50%; }

/* ===== Buttons / chips / badges ===== */
/* ボタン：角丸（ピル型）。CTA（問い合わせ・資料DL・診断・相談）はオレンジ、それ以外は紺 */
.btn { display: inline-flex; gap: 8px; align-items: center; justify-content: center; font-weight: 700; line-height: 1.5; text-decoration: none; white-space: nowrap; border: 2px solid transparent; border-radius: 999px; transition: background-color .2s, border-color .2s, color .2s, box-shadow .2s, transform .2s; }
.btn:hover { box-shadow: 0 2px 2px 0 var(--shadow-button); transform: translateY(-2px); }
.btn-sm { padding: 4px 20px; font-size: .875rem; }
.btn-lg { min-width: 290px; padding: 14px 28px; font-size: 1rem; }
.btn-block { display: flex; width: 100%; padding: 6px 16px; font-size: .875rem; }
.btn-cta { color: #fff; background: var(--cta); border-color: var(--cta); }
.btn-cta:hover { color: #fff; background: var(--cta-hover); border-color: var(--cta-hover); }
.btn-cta-outline { color: var(--cta); background: #fff; border-color: var(--cta); }
.btn-cta-outline:hover { color: #fff; background: var(--cta-hover); border-color: var(--cta-hover); }
.btn-primary { color: #fff; background: var(--accent); border-color: var(--accent); }
.btn-primary:hover { color: #fff; background: var(--primary-hover); border-color: var(--primary-hover); }
.btn-primary-outline { color: var(--accent); background: #fff; border-color: var(--accent); }
.btn-primary-outline:hover { color: #fff; background: var(--primary-hover); border-color: var(--primary-hover); }
.chip { display: inline-block; padding: 3px 14px; font-size: .74rem; font-weight: 600; text-decoration: none; white-space: nowrap; background: #fff; border: 1px solid #c9d3e3; border-radius: 999px; }
.badges { display: flex; flex-wrap: wrap; gap: 6px; }
.badge { display: inline-block; padding: 1px 9px; font-size: .68rem; font-weight: 700; line-height: 1.6; color: var(--accent); background: #fff; border: 1px solid var(--accent); border-radius: 999px; }
.badge-solid { color: #fff; background: var(--accent); }
.arrow { display: inline-flex; color: var(--accent); }

/* ===== Header ===== */
.site-header { background: #fff; border-bottom: 1px solid #e3e8f0; }
.header-top { display: flex; gap: 24px; align-items: center; justify-content: space-between; max-width: 1200px; padding: 14px 24px 6px; margin: 0 auto; }
.brand { display: inline-flex; gap: 14px; align-items: center; text-decoration: none; }
.brand-name { font-size: 1.2rem; font-weight: 800; color: var(--text); white-space: nowrap; }
.brand-sep { width: 1px; height: 20px; background: #b8c2d3; }
.brand-site { font-size: 1.02rem; font-weight: 700; color: var(--text); }
.header-actions { display: flex; gap: 10px; align-items: center; }
.icon-btn { display: inline-flex; padding: 6px; color: var(--text); }
.global-nav { display: flex; gap: 44px; justify-content: flex-start; max-width: 1200px; padding: 0 24px; margin: 0 auto; overflow-x: auto; font-size: .9rem; font-weight: 700; }
.global-nav a { padding: 10px 0 12px; text-decoration: none; white-space: nowrap; border-bottom: 3px solid transparent; }
.global-nav a:hover { border-bottom-color: var(--accent); }
/* PCのメニューは右寄せ（幅が足りずに横スクロールになる場合も左端が切れないよう、justify-contentではなく先頭の左マージンで寄せる） */
.global-nav a:first-child { margin-left: auto; }

/* ===== Topic bar ===== */
.topic-bar { overflow: hidden; background: #f3f6fb; border-bottom: 1px solid #e3e8f0; }
.topic-inner { display: flex; gap: 26px; align-items: stretch; max-width: 1200px; padding: 0 24px; margin: 0 auto; }
/* 「注目のトピックス」：バーの高さいっぱいの矢印。左（明るい青）→右（紺）のグラデーション。左端はロゴの左端に揃える */
.topic-label { --topic-from: #3073b6; --topic-to: #002850; position: relative; display: inline-flex; gap: 8px; align-items: center; padding: 0 12px 0 16px; font-size: .78rem; font-weight: 700; color: #fff; white-space: nowrap; background: linear-gradient(90deg, var(--topic-from), #004386 55%, var(--topic-to)); }
/* 矢印の三角：長方形と1px重ねて、境目にすき間が出ないようにする */
.topic-label::after { position: absolute; top: 0; bottom: 0; left: calc(100% - 1px); width: 15px; clip-path: polygon(0 0, 100% 50%, 0 100%); content: ""; background: var(--topic-to); }
.topic-chips { display: flex; flex: 1; gap: 8px; align-items: center; padding: 7px 0; overflow-x: auto; scrollbar-width: none; }

/* ===== Hero ===== */
.hero { padding: 48px 0 40px; background: linear-gradient(180deg, #f4f8fd 0%, #e8f0fa 100%); }
.hero-inner { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, .9fr); gap: 24px 40px; }
.hero-text h1 { margin: 0 0 22px; font-size: clamp(2rem, 3.8vw, 2.9rem); font-weight: 900; line-height: 1.35; color: var(--text); }
.hero-text p { max-width: 34em; margin: 0; font-size: .98rem; color: #36415e; }
.hero-visual { min-height: 260px; border-radius: 6px; }
/* MV画像：ヒーロー全体の背景。左側は白いもやを重ねて見出しを読みやすくする */
.hero-has-image { position: relative; padding: 64px 0 48px; background-color: #eef4fb; background-image: linear-gradient(90deg, rgba(244, 248, 253, .94) 0%, rgba(244, 248, 253, .82) 34%, rgba(244, 248, 253, .25) 58%, rgba(244, 248, 253, 0) 72%), var(--hero-image); background-position: right center; background-size: cover; }
.hero-has-image .hero-inner { grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); }
.hero-has-image .hero-text { grid-column: 1; }
.hero-has-image .hero-text p { color: #2a3550; }
.hero-has-image .hero-search { margin-top: 36px; }
.hero-search { display: flex; grid-column: 1 / -1; gap: 10px; align-items: center; width: 100%; max-width: 980px; padding: 0 0 0 20px; margin: 8px auto 0; color: var(--accent-dark); background: #fff; border: 1px solid #c9d3e3; border-radius: 6px; box-shadow: 0 4px 16px rgba(22, 36, 74, .08); }
.hero-search input { flex: 1; min-width: 0; width: 100%; padding: 18px 4px; font: inherit; font-size: .95rem; background: transparent; border: 0; border-radius: 0; -webkit-appearance: none; appearance: none; }
.hero-search input:focus { outline: none; }
.hero-search:focus-within { border-color: var(--accent); }
.hero-search button { align-self: stretch; padding: 0 40px; font: inherit; font-weight: 700; color: #fff; cursor: pointer; background: var(--accent); border: 0; border-radius: 0 6px 6px 0; transition: background-color .2s; }
.hero-search button:hover { background: var(--primary-hover); }
.keywords { display: flex; flex-wrap: wrap; grid-column: 1 / -1; gap: 8px; align-items: center; justify-content: center; font-size: .78rem; }
.keywords > span { margin-right: 4px; font-weight: 700; }

/* ===== Sections ===== */
.sec { padding: 52px 0 12px; }
.sec-tint { padding: 44px 0 40px; margin-top: 40px; background: var(--surface); }
.sec-head { display: flex; gap: 16px; align-items: flex-end; justify-content: space-between; margin-bottom: 20px; }
.sec-title { display: grid; grid-template-columns: auto 1fr; column-gap: 12px; align-items: center; }
.sec-title .sec-icon { grid-row: 1 / span 2; align-self: start; margin-top: 2px; }
.sec-title h2 { margin: 0; font-size: 1.55rem; font-weight: 900; color: var(--text); }
.sec-title p { grid-column: 2; margin: 0; font-size: .84rem; color: #4a5470; }
.sec-head-inline .sec-title { display: flex; flex-wrap: wrap; gap: 4px 14px; align-items: center; }
.sec-head-inline .sec-title .sec-icon { align-self: center; margin-top: 0; }
.sec-head-inline .sec-title p { padding-left: 14px; border-left: 1px solid #b8c2d3; }
.more { display: inline-flex; gap: 6px; align-items: center; font-size: .8rem; font-weight: 700; color: var(--accent); text-decoration: none; white-space: nowrap; }
.grid { display: grid; gap: 16px; }
.grid-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card { background: #fff; border: 1px solid #e1e6ee; border-radius: 4px; box-shadow: 0 1px 3px rgba(22, 36, 74, .05); }
.card h3 { margin: 0; font-weight: 800; line-height: 1.5; color: var(--text); }
.card p { margin: 0; color: #5a6380; }

/* テーマから学ぶ */
.theme-card { position: relative; display: flex; flex-direction: column; padding: 20px 14px 36px; text-decoration: none; }
.theme-icon { display: block; margin: 4px auto 14px; font-size: 52px; color: var(--accent); }
.theme-card h3 { margin-bottom: 8px; font-size: .9rem; }
.theme-card p { font-size: .76rem; line-height: 1.65; }
.theme-card .arrow { position: absolute; right: 12px; bottom: 12px; }

/* 記事カード */
.card-link { display: flex; flex-direction: column; height: 100%; text-decoration: none; }
.thumb { width: 100%; aspect-ratio: 1200 / 630; border-radius: 4px 4px 0 0; object-fit: cover; }
.card-body { display: flex; flex: 1; flex-direction: column; gap: 10px; padding: 12px 10px 12px; }
.news-card h3, .learn-card h3 { font-size: .93rem; }
.news-card p { font-size: .76rem; line-height: 1.7; }
.card-foot { display: flex; align-items: center; justify-content: space-between; margin-top: auto; font-size: .74rem; color: #6c7590; }
.learn-card { background: transparent; border: 0; box-shadow: none; }
.learn-card .thumb { border-radius: 4px; aspect-ratio: 1200 / 630; }
.learn-card .card-body { gap: 8px; padding: 10px 2px; }

/* 対策ガイド */
.guide-card { display: flex; flex-direction: column; gap: 10px; padding: 16px 14px 14px; }
.guide-icon { display: block; margin: 4px auto 10px; font-size: 56px; color: var(--accent); }
.guide-card h3 { font-size: .93rem; }
.guide-card p { flex: 1; font-size: .78rem; line-height: 1.7; }
.file-meta { font-size: .72rem; color: #6c7590; }

/* 特集 */
.feature-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, .9fr); gap: 16px; }
.feature-main { position: relative; display: flex; align-items: flex-end; min-height: 330px; overflow: hidden; text-decoration: none; background: #002850; border-radius: 8px; }
.feature-bg { position: absolute; inset: 0; background: #b9bec7; }
.feature-copy { position: relative; z-index: 2; max-width: 62%; padding: 28px 28px 30px; color: #fff; }
.feature-copy h3 { margin: 0 0 14px; font-size: clamp(1.3rem, 2.3vw, 1.75rem); font-weight: 900; line-height: 1.45; }
.feature-copy p { margin: 0 0 18px; font-size: .86rem; color: #dbe4f5; }
.feature-copy .btn { border-radius: 999px; }
.feature-list { display: grid; gap: 10px; align-content: space-between; }
/* 特集リスト：サムネを枠の上下左にぴったり付ける */
.feature-item { display: grid; grid-template-columns: 200px minmax(0, 1fr) auto; gap: 14px; align-items: center; padding: 0 14px 0 0; overflow: hidden; text-decoration: none; background: #fff; border-radius: 8px; }
.feature-item > div { min-width: 0; padding: 6px 0; }
/* サムネは1200:630のまま全体を表示し、カードの高さ＝サムネの高さ。文字を小さくして収める */
.feature-thumb { display: block; width: 100%; height: auto; aspect-ratio: 1200 / 630; border-radius: 0; object-fit: cover; }
.feature-item h3 { display: -webkit-box; margin: 0 0 6px; overflow: hidden; font-size: .82rem; line-height: 1.45; color: var(--text); -webkit-box-orient: vertical; -webkit-line-clamp: 3; }
.feature-meta { display: flex; flex-wrap: wrap; gap: 4px 8px; align-items: center; font-size: .66rem; line-height: 1.4; color: #6c7590; }
.feature-meta .badge { padding: 0 7px; font-size: .6rem; }
.feature-meta .badges { gap: 4px; }

/* プロダクト */
.product { padding: 32px 0 44px; margin-top: 24px; background: #f6f9fd; }
.product-inner { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 2fr); gap: 28px; align-items: center; }
.product-pre { margin: 0; font-size: .95rem; font-weight: 800; }
.product-name { margin: 0 0 8px; font-size: 1.6rem; font-weight: 900; color: var(--accent-dark); }
.product-text > p:not([class]) { margin: 0 0 14px; font-size: .8rem; color: #4a5470; }
/* Biz Premium紹介の機能：ボタンに見えないよう枠・白背景なしで、グレー背景の上にそのまま載せる */
.product-card { padding: 4px 0; text-align: left; background: none; border: 0; border-radius: 0; box-shadow: none; }
.product-icon { display: block; margin: 0 auto 10px; font-size: 44px; color: var(--accent); }
/* カードのアイコン画像（_incoming から受け取ったSVG）。縦横比はそのまま、高さで揃える */
.card-icon-img { display: block; width: auto; max-width: 100%; margin-right: auto; margin-left: auto; object-fit: contain; }
.theme-icon.card-icon-img { height: 64px; margin-top: 4px; margin-bottom: 14px; }
.guide-icon.card-icon-img { height: 72px; margin-top: 4px; margin-bottom: 12px; }
.product-icon.card-icon-img { height: 52px; margin-bottom: 10px; }
.product-card h3 { margin-bottom: 6px; font-size: .88rem; }
.product-card p { font-size: .72rem; line-height: 1.6; }

/* CTA */
.cta { padding: 40px 0 44px; color: #fff; text-align: center; background: var(--accent); }
.cta h2 { margin: 0 0 6px; font-size: 1.55rem; font-weight: 900; }
.cta p { margin: 0 0 24px; font-size: .92rem; color: #dbe4f5; }
.cta-buttons { display: flex; flex-wrap: wrap; gap: 20px; justify-content: center; }

/* ===== Footer ===== */
.site-footer { padding: 18px 0 14px; background: #fff; border-top: 1px solid #e3e8f0; }
.footer-inner { display: flex; gap: 24px; align-items: center; max-width: 1200px; padding: 0 24px; margin: 0 auto; }
.site-footer .brand-name { font-size: 1.05rem; }
.site-footer .brand-site { font-size: .74rem; font-weight: 600; }
.footer-links { display: flex; gap: 28px; margin-left: auto; font-size: .76rem; }
.footer-links a { text-decoration: none; }
.social-links { display: flex; gap: 14px; }
.site-footer small { display: block; margin-top: 10px; font-size: .7rem; color: #6c7590; text-align: center; }

/* ===== 記事一覧・記事詳細・固定ページ ===== */
.page-head { max-width: 1200px; padding: 56px 24px 28px; margin: 0 auto; }
.page-head h1 { margin: 8px 0 12px; font-size: clamp(2rem, 4vw, 3rem); line-height: 1.3; }
.eyebrow, .category { font-size: .82rem; font-weight: 800; color: var(--accent-dark); }
.text-link { font-weight: 800; color: var(--accent-dark); }
.archive-grid { padding-bottom: 80px; }
.article-page { max-width: 820px; padding: 56px 24px 100px; margin: 0 auto; }
.article-head h1 { margin: 14px 0 18px; font-size: clamp(1.8rem, 4vw, 2.8rem); line-height: 1.35; }
.dek { font-size: 1.05rem; color: #4a5470; }
.article-head time { font-size: .85rem; color: #6c7590; }
.article-hero { width: 100%; margin: 36px 0; aspect-ratio: 1200 / 630; object-fit: cover; }
.article-body { margin-top: 40px; }
.article-body h2 { padding-top: .5em; margin: 2.6em 0 .8em; font-size: 1.55rem; line-height: 1.45; border-top: 2px solid var(--accent); }
.article-body h3 { margin: 2.2em 0 .7em; font-size: 1.25rem; }
.article-body p, .article-body ul, .article-body blockquote { margin: 1.2em 0; }
.article-body blockquote { padding: 4px 0 4px 20px; margin-left: 0; color: #4a5470; border-left: 4px solid var(--accent); }
.article-body figure { margin: 2rem 0; }
.article-body figcaption { margin-top: 6px; font-size: .82rem; color: #6c7590; }
.table-wrap { margin: 2rem 0; overflow-x: auto; }
table { width: 100%; font-size: .92rem; border-collapse: collapse; }
th, td { padding: 12px; text-align: left; vertical-align: top; border: 1px solid #d3dbe7; }
th { background: var(--surface); }
pre { padding: 20px; overflow-x: auto; color: #f3f6fb; background: var(--text); border-radius: 4px; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.empty-state { max-width: 820px; padding: 120px 24px; margin: 0 auto; }
.empty-state h1 { font-size: clamp(2rem, 5vw, 3.5rem); }

/* ===== Responsive ===== */
/* 特集：リストの文字がサムネの高さに収まる幅を確保するため、1200px以下は縦積み */
@media (max-width: 1200px) { .feature-grid { grid-template-columns: 1fr; } }
@media (max-width: 1080px) {
  .grid-6 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .global-nav { gap: 28px; }
  .product-inner { grid-template-columns: 1fr; }
}
@media (max-width: 780px) {
  .header-top { flex-wrap: wrap; gap: 10px; }
  .brand { flex-wrap: wrap; gap: 4px 10px; }
  .brand-site { font-size: .86rem; }
  .global-nav { gap: 22px; font-size: .84rem; }
  .hero { padding: 32px 0; }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { order: -1; min-height: 180px; }
  .hero-has-image { padding: 36px 0 32px; background-image: linear-gradient(180deg, rgba(244, 248, 253, .9) 0%, rgba(244, 248, 253, .78) 55%, rgba(244, 248, 253, .6) 100%), var(--hero-image-sp, var(--hero-image)); background-position: center; }
  .hero-has-image .hero-inner { grid-template-columns: 1fr; }
  .hero-has-image .hero-search { margin-top: 20px; }
  .hero-search { padding-left: 14px; }
  .hero-search button { flex-shrink: 0; padding: 0 20px; white-space: nowrap; }
  /* iPhoneは16px未満の入力欄をタップすると画面が拡大され、検索欄が右にはみ出して見えるため16pxにする */
  .hero-search input { font-size: 16px; }
  .keywords { justify-content: flex-start; }
  .sec-head { flex-wrap: wrap; }
  .sec-head-inline .sec-title p { flex-basis: 100%; padding-left: 0; border-left: 0; }
  .grid-6 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .guides .grid-4, #guides .grid-4 { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-copy { max-width: 100%; }
  .feature-bg { inset: 0; opacity: .35; }
  .feature-item { grid-template-columns: 140px minmax(0, 1fr); gap: 10px; padding-right: 8px; }
  .feature-item .arrow { display: none; }
  .feature-item > div { padding: 4px 0; }
  .feature-item h3 { margin-bottom: 3px; font-size: .6875rem; line-height: 1.35; }
  .feature-meta { gap: 2px 6px; font-size: .6rem; }
  .feature-meta .badge { padding: 0 5px; }
  .feature-meta .badge:nth-child(n+2) { display: none; }
  .btn-lg { width: 100%; min-width: 0; }
  .footer-inner { flex-wrap: wrap; }
  .footer-links { flex-wrap: wrap; gap: 8px 20px; margin-left: 0; }
}
@media (max-width: 480px) {
  .grid-4 { grid-template-columns: 1fr; }
  .header-actions .btn-sm { padding: 6px 10px; font-size: .78rem; }
}

/* ===== 微調整 ===== */
.sec-head-inline { align-items: center; }
.feature-main::before { position: absolute; z-index: 1; content: ""; background: linear-gradient(90deg, rgba(0, 40, 80, .96) 0%, rgba(0, 52, 105, .88) 38%, rgba(0, 67, 134, .45) 62%, rgba(0, 67, 134, 0) 82%); inset: 0; }
/* 特集（大）の背景画像（bk-feature）。人物が右に来るよう右寄せで敷く */
.feature-bg-image { background-position: right center; background-size: cover; inset: 0; }
@media (max-width: 780px) {
  .feature-bg { opacity: 1; }
  .feature-main::before { background: linear-gradient(90deg, rgba(0, 40, 80, .92) 0%, rgba(0, 52, 105, .8) 55%, rgba(0, 67, 134, .35) 100%); }
}
@media (max-width: 780px) {
  .brand-sep { display: none; }
  .brand { flex-direction: column; align-items: flex-start; }
  .sec-title h2 { font-size: 1.3rem; }
}

/* ===== Search page ===== */
.search-form { max-width: 820px; margin: 20px 0 0; }
.search-keywords { justify-content: flex-start; margin-top: 16px; }
.search-results-wrap { padding-bottom: 80px; }
.search-status { margin: 0 0 20px; font-weight: 700; color: var(--accent-dark); }
.search-empty { grid-column: 1 / -1; padding: 32px; margin: 0; background: var(--surface); border-radius: 6px; }

/* ===== 移行記事（旧お役立ち情報）用：旧テーマ（Bootstrap）依存の装飾。記事本文内だけに適用 ===== */
.article-body .mt-3 { margin-top: 1rem; }
.article-body .mt-4 { margin-top: 1.5rem; }
.article-body .mb-0 { margin-bottom: 0; }
.article-body .mb-3 { margin-bottom: 1rem; }
.article-body .mb-4 { margin-bottom: 1.5rem; }
.article-body .p-3 { padding: 1rem; }
.article-body .p-4 { padding: 1.5rem; }
.article-body .small, .article-body small { font-size: .82rem; }
.article-body .text-muted { color: #6c7590; }
.article-body .text-danger { color: #dc3545; }
.article-body .text-center { text-align: center; }
.article-body .text-center > img, .article-body .text-center > a > img, .article-body .text-center picture img { margin-right: auto; margin-left: auto; }
.article-body .align-middle, .article-body .align-middle td, .article-body .align-middle th, .article-body td.align-middle, .article-body th.align-middle { vertical-align: middle; }
.article-body .bg-light { background: #f8f9fa; }
.article-body .alert { padding: 1rem 1.25rem; margin: 1.5rem 0; border: 1px solid transparent; border-radius: 4px; }
.article-body .alert > :first-child { margin-top: 0; }
.article-body .alert > :last-child { margin-bottom: 0; }
.article-body .alert-primary { color: #004085; background: #cce5ff; border-color: #b8daff; }
.article-body .alert-danger { color: #721c24; background: #f8d7da; border-color: #f5c6cb; }
.article-body .alert-success { color: #155724; background: #d4edda; border-color: #c3e6cb; }
/* 旧記事の表の枠（table-responsive）：幅の広い表は枠の中で横スクロール */
.article-body .table-responsive { margin: 1rem 0; overflow-x: auto; }
.article-body a { color: var(--textlink); overflow-wrap: anywhere; }
.article-body a:hover { color: var(--textlink-hover); }

/* ===== ヘッダーロゴ ===== */
/* ロゴSVGは左に余白（高さの13/48）があるため、その分左にずらして文字の左端を本文・矢印の左端に揃える */
.brand-logo img { --logo-h: 36px; display: block; width: auto; max-width: 100%; height: var(--logo-h); --logo-pad: calc(var(--logo-h) * -10 / 86.07); margin: var(--logo-pad) 0 var(--logo-pad) var(--logo-pad); }
.brand-subtitle { font-size: .86rem; font-weight: 600; color: #4a5470; white-space: nowrap; }
@media (max-width: 780px) {
  .brand-logo { flex: 1 1 auto; min-width: 0; }
  .brand-logo img { --logo-h: 26px; }
  .brand-logo .brand-sep { display: none; }
  .brand-subtitle { font-size: .74rem; white-space: normal; }
}

/* ===== OPTiM Biz Premium ロゴ（フッター・製品紹介） ===== */
.brand-premium-logo { display: block; width: auto; height: 28px; }
.site-footer .brand-premium-logo { height: 24px; }
.product-name .brand-premium-logo { height: 44px; }
@media (max-width: 780px) { .product-name .brand-premium-logo { height: 34px; } }

/* 特集リスト：狭いスマホ（400px以下）ではタグ・日付をさらに小さくして1行に収める */
@media (max-width: 400px) { .feature-meta { font-size: .56rem; } .feature-meta .badge { padding: 0 4px; font-size: .56rem; } }

/* スマホ（780px以下）は「注目のトピックス」の矢印を画面の左端にぴったり付ける */
@media (max-width: 780px) {
  .topic-inner { gap: 22px; padding-left: 0; }
  /* スマホは「注目のトピックス」の文字を見た目だけ消し、上昇アイコンのみ表示（読み上げでは文字を読む） */
  .topic-label { padding: 0 6px 0 14px; }
  .topic-label-text { position: absolute; width: 1px; height: 1px; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
  .topic-label .icon-topic { font-size: 22px; }
}

/* ===== スマホ用ハンバーガーメニュー（780px以下で表示） ===== */
.menu-toggle, .sp-menu { display: none; }
@media (max-width: 780px) {
  .global-nav, .header-actions .icon-btn { display: none; }
  .menu-toggle { display: inline-grid; place-items: center; width: 40px; height: 40px; padding: 0; margin-left: 2px; color: var(--accent); cursor: pointer; background: transparent; border: 0; border-radius: 8px; }
  .menu-toggle .material-symbols-outlined { font-size: 30px; }
  .menu-toggle .menu-icon-close, .menu-toggle[aria-expanded="true"] .menu-icon-open { display: none; }
  .menu-toggle[aria-expanded="true"] .menu-icon-close { display: inline-block; }
  .sp-menu:not([hidden]) { display: block; padding: 14px 24px 18px; background: #fff; border-top: 1px solid #e3e8f0; }
  .sp-search { display: flex; gap: 6px; align-items: center; padding-left: 12px; color: var(--accent); background: #fff; border: 1px solid #c9d3e3; border-radius: 6px; }
  .sp-search:focus-within { border-color: var(--accent); }
  .sp-search input { flex: 1; min-width: 0; padding: 12px 4px; font: inherit; font-size: 1rem; background: transparent; border: 0; }
  .sp-search input:focus { outline: none; }
  .sp-search button { align-self: stretch; padding: 0 18px; font: inherit; font-weight: 700; color: #fff; cursor: pointer; background: var(--accent); border: 0; border-radius: 0 5px 5px 0; }
  .sp-nav { display: flex; flex-direction: column; margin-top: 10px; }
  .sp-nav a { display: flex; align-items: center; justify-content: space-between; padding: 14px 4px; font-weight: 700; color: var(--text); text-decoration: none; border-bottom: 1px solid #e3e8f0; }
  .sp-nav a::after { width: 8px; height: 8px; content: ""; border-top: 2px solid var(--accent); border-right: 2px solid var(--accent); transform: rotate(45deg); }
}

/* ===== テーマ別記事一覧 ===== */
.theme-count { margin-top: 6px; font-size: .875rem; font-weight: 700; color: var(--accent); }
.theme-empty { padding: 32px; margin: 0 0 40px; background: var(--surface); border-radius: 8px; }
.theme-back { padding-bottom: 72px; margin-top: 8px; }

/* ===== PCヘッダー：ロゴの下にサブタイトル（2行）、メニューはヘッダー上段に入れる =====
   1200px以上：［ロゴ＋サブタイトル｜メニュー｜検索・ボタン］の1段
   781〜1199px：幅が足りないためメニューだけ2段目（右寄せ） */
@media (min-width: 781px) {
  .header-top { flex-wrap: wrap; row-gap: 2px; column-gap: 28px; padding: 12px 24px 0; }
  /* メニューのホバー下線をヘッダー下端（MVの上端）にくっつける：メニューを下端まで伸ばし、ヘッダー下罫線1pxに重ねる */
  .header-top .global-nav { position: relative; top: 1px; flex: 1 0 100%; gap: 28px; order: 3; max-width: none; padding: 0; margin: 0; }
  .header-top .global-nav a { padding: 10px 0 12px; }
  .brand-logo { flex-direction: column; gap: 2px; align-items: flex-start; }
  .brand-logo .brand-sep { display: none; }
  .brand-logo img { --logo-h: 32px; }
  .brand-subtitle { font-size: .78rem; }
  .header-top .header-actions { margin-left: auto; }
}
@media (min-width: 1200px) {
  .header-top { align-items: stretch; padding-top: 0; }
  .header-top > .brand, .header-top .header-actions { align-self: center; padding: 12px 0; }
  .header-top .global-nav { flex: 1 1 auto; align-items: stretch; order: 0; }
  .header-top .global-nav a { display: flex; align-items: center; padding: 0; }
  .header-top .header-actions { margin-left: 0; }
}

/* ===== 対策ガイド・チェックリスト（SCSバナー／SaaSホワイトペーパー） ===== */
.guide-group + .guide-group { margin-top: 36px; }
.guide-group-title { padding-left: 12px; margin: 0 0 14px; font-size: 1.05rem; line-height: 1.4; border-left: 4px solid var(--accent); }
.guide-banner-row { display: flex; gap: 16px; align-items: center; justify-content: center; }
.guide-banner-row + .guide-banner-row { margin-top: 16px; }
.guide-banner { display: block; flex: 0 1 var(--banner-w); max-width: var(--banner-w); border-radius: 8px; transition: transform .2s, box-shadow .2s; }
.guide-banner img { display: block; width: 100%; height: auto; }
.guide-banner:hover { box-shadow: 0 4px 12px rgba(0, 0, 0, .12); transform: translateY(-2px); }
.guide-wp-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.guide-wp { display: flex; flex-direction: column; overflow: hidden; color: var(--text); text-decoration: none; }
.guide-wp-thumb { display: block; width: 100%; aspect-ratio: 420 / 236; object-fit: cover; }
.guide-wp-body { display: flex; flex: 1; flex-direction: column; gap: 8px; padding: 14px 16px 16px; }
.guide-wp-label { align-self: flex-start; padding: 0 8px; font-size: .68rem; font-weight: 700; color: var(--accent); border: 1px solid var(--accent); border-radius: 999px; }
.guide-wp h4 { flex: 1; margin: 0 0 4px; font-size: .95rem; line-height: 1.5; }
@media (max-width: 780px) {
  .guide-banner-row { flex-direction: column; gap: 12px; align-items: center; }
  .guide-banner-row + .guide-banner-row { margin-top: 12px; }
  .guide-banner { flex: none; width: 100%; }
  .guide-wp-grid { grid-template-columns: 1fr; }
}

/* ===== フッターのロゴ：サイトロゴ＋サブタイトル、その下に by OPTiM Biz Premium ===== */
.footer-brand { display: flex; flex-direction: column; gap: 8px; align-items: flex-start; }
.footer-logo { flex-direction: column; gap: 2px; align-items: flex-start; }
.footer-logo .brand-subtitle { font-size: .72rem; }
.footer-by { display: flex; gap: 8px; align-items: center; margin: 0; font-size: .8rem; font-weight: 600; color: #6c7590; }
.footer-by .brand-premium-logo { height: 28px; }

/* ===== 対策ガイド：同じサイズのカード（PC 1081px以上は5枚横並び、それ以下は横スワイプ：タブレット2枚・スマホ1枚表示） ===== */
/* container-type と cqw（コンテナクエリ）は現行ブラウザで使えるが、リポジトリのstylelint 13が知らないため、その行だけチェックを外す */
/* stylelint-disable-next-line property-no-unknown */
.guide-slider { --per-view: 2; --slide-gap: 16px; padding: 4px 0 8px; overflow-x: auto; container-type: inline-size; scroll-snap-type: x mandatory; scrollbar-width: thin; }
.guide-track { display: flex; gap: var(--slide-gap); }
/* stylelint-disable-next-line unit-no-unknown */
.guide-slide { flex: 0 0 calc((100cqw - (var(--per-view) - 1) * var(--slide-gap)) / var(--per-view)); scroll-snap-align: start; }
/* 画像枠は全カード同じサイズ（16:9相当）。横長バナーは切らずに全体を表示し、余白は薄い背景色 */
.guide-slide-media { display: grid; place-items: center; overflow: hidden; background: var(--surface); aspect-ratio: 420 / 236; }
.guide-slide-media img { display: block; width: 100%; height: 100%; object-fit: contain; }
@media (max-width: 600px) { .guide-slider { --per-view: 1; } }
@media (min-width: 1081px) {
  .guide-slider { overflow: visible; }
  .guide-track { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 14px; }
  .guide-slide .guide-wp-body { padding: 12px 12px 14px; }
  .guide-slide h4 { font-size: .84rem; line-height: 1.5; }
  .guide-slide .btn-block { padding: 6px 8px; font-size: .8rem; }
}
/* 縦長の画像（セルフチェックの画面イメージ）は枠いっぱいに上端基準で表示 */
.guide-slide-media.is-cover-top img { object-fit: cover; object-position: center top; }

/* ===== 新着記事：スマホは2列×2行で4件 ===== */
@media (max-width: 780px) {
  #learning .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px 12px; }
  #learning .learn-card .card-body { gap: 6px; padding: 8px 0 4px; }
  #learning .learn-card h3 { font-size: .8rem; line-height: 1.45; }
  #learning .badges { gap: 4px; }
  #learning .badge { padding: 0 6px; font-size: .6rem; }
  #learning .card-foot { font-size: .66rem; }
}

/* ===== 対策ガイド：スマホ（780px以下）は横スワイプをやめて2列で並べる ===== */
@media (max-width: 780px) {
  .guide-slider { overflow: visible; scroll-snap-type: none; }
  .guide-track { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); grid-auto-rows: 1fr; gap: 12px; }
  .guide-slide .guide-wp-body { gap: 6px; padding: 8px 8px 10px; }
  .guide-slide .guide-wp-label { padding: 0 6px; font-size: .58rem; }
  .guide-slide h4 { font-size: .76rem; line-height: 1.45; }
  .guide-slide .btn-block { gap: 4px; padding: 6px 4px; font-size: .7rem; }
  .guide-slide .btn-block .material-symbols-outlined { font-size: 15px; }
}
@media (max-width: 360px) { .guide-slide .btn-block .material-symbols-outlined { display: none; } }

/* ===== Biz Premium紹介：スマホ（780px以下）は4つを1列に並べ、アイコンと項目名だけ表示 ===== */
@media (max-width: 780px) {
  .product-cards.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; }
  .product-card { padding: 0; text-align: center; }
  .product-card .product-icon.card-icon-img { height: 36px; margin-bottom: 6px; }
  .product-card h3 { margin: 0; font-size: .68rem; line-height: 1.35; }
  .product-card p { display: none; }
}
.footer-by-link { display: inline-flex; transition: opacity .2s; }
.footer-by-link:hover { opacity: .7; }
.product-name-link { display: inline-flex; transition: opacity .2s; }
.product-name-link:hover { opacity: .7; }

/* ===== サイトロゴ「OPTiM 情報漏洩・サイバーセキュリティ対策ナビ」（2段＋「対策ナビ」の四角） =====
   ロゴSVGは文字の周りに余白（viewBox 86.07 のうち上下左右 10）を持つため、その分を負のマージンで打ち消し、
   文字の左端を本文の左端に、上下はヘッダーの余白が均等になるように揃える */
@media (min-width: 781px) {
  .header-top .brand-logo img { --logo-h: 60px; }
}
@media (max-width: 780px) {
  /* スマホ：ロゴとハンバーガーメニューのみ。上下の余白は12pxずつ */
  .header-top { flex-wrap: nowrap; gap: 8px; align-items: center; padding: 12px 24px; }
  .header-top .brand-logo { flex: 1 1 auto; min-width: 0; }
  .header-top .brand-logo img { --logo-h: 44px; }
  .header-top .header-actions { flex: 0 0 auto; }
  .header-top .header-actions .btn { display: none; }
}
.footer-logo img { --logo-h: 44px; }
@media (max-width: 780px) {
  .footer-logo img { --logo-h: 40px; }
}
/* スマホのハンバーガーメニュー：一番下に「無料診断」「相談する」を横並びで */
.sp-actions { display: none; }
@media (max-width: 780px) {
  .sp-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 18px; }
  .sp-actions .btn { justify-content: center; min-height: 48px; padding: 10px 12px; font-size: .95rem; text-align: center; }
}

/* 画面には表示せず、読み上げソフトにだけ伝える（見出しの階層を整えるため） */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }