/* ============================================================
   business-succession 特集: M&A手数料シミュレーター＆事業承継診断 tool.css
   専用クラスはすべて feature-* 接頭辞（styles.css と同名クラス禁止）
   ベース変数は styles.css の :root（--navy, --gold, --line 等）を利用
   ============================================================ */

/* 見出しの折り返し最終行1文字（ウィドウ）対策: 全見出しに適用 */
.feature-hero h1,
.feature-section h2,
.feature-section h3,
.feature-result-card h4,
.feature-about h1,
.feature-about h2,
.feature-about h3,
.feature-about h4 {
  text-wrap: balance;
  word-break: auto-phrase;
  line-break: strict;
  overflow-wrap: break-word;
}

/* AdSense Auto ads のヒーロー侵入抑止 */
.feature-hero ins.adsbygoogle,
.feature-hero > ins {
  display: none !important;
}

/* ---------- Hero ---------- */
.feature-hero {
  position: relative;
  min-height: 400px;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  background: var(--navy-deep);
}

.feature-hero-bg img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.72;
}

.feature-hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(14, 23, 41, 0.08) 22%, rgba(14, 23, 41, 0.62) 100%);
}

.feature-hero-inner {
  position: relative;
  z-index: 2;
  max-width: 1180px;
  margin: 0 auto;
  width: 100%;
  padding: 5rem 1.2rem 1.8rem;
}

.feature-ribbon {
  position: absolute;
  top: 18px;
  right: 18px;
  z-index: 3;
  padding: 6px 18px;
  background: #1f9d55;
  color: #fff;
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  border-radius: 4px;
  box-shadow: 0 2px 10px rgba(31, 157, 85, 0.45);
}

.feature-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  margin: 0 0 14px;
  font-size: 0.78rem;
  color: var(--gold-bright);
}

.feature-breadcrumb li + li::before {
  content: "›";
  margin-right: 6px;
  color: rgba(255, 255, 255, 0.65);
}

.feature-breadcrumb a {
  color: rgba(255, 255, 255, 0.88);
}

.feature-hero-title {
  font-family: var(--font-head);
  font-size: clamp(1.7rem, 3.6vw, 2.6rem);
  font-weight: 800;
  line-height: 1.45;
  margin: 0 0 14px;
  color: #fff8ec;
  text-shadow: 0 3px 18px rgba(0, 0, 0, 0.6), 0 1px 3px rgba(0, 0, 0, 0.65);
}

.feature-hero-sub {
  max-width: 760px;
  color: #ffffff;
  font-size: 1.02rem;
  font-weight: 500;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.55);
  margin: 0 0 0.8rem;
}

.feature-hero-updated {
  font-size: 0.8rem;
  color: var(--gold-pale);
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.7);
}

.feature-hero-updated a {
  color: var(--gold-pale);
  text-decoration: underline;
}

.feature-hero-anchors {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.feature-hero-anchors a {
  padding: 10px 18px;
  border: 1px solid rgba(217, 164, 65, 0.8);
  border-radius: 999px;
  color: var(--gold-bright);
  font-size: 0.85rem;
  font-weight: 600;
  background: rgba(14, 23, 41, 0.55);
}

.feature-hero-anchors a:hover {
  background: var(--gold);
  color: #fff;
}

/* ---------- Section 共通 ---------- */
.feature-section {
  padding: clamp(42px, 6vw, 70px) 0;
}

.feature-section-alt {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #efece3;
}

.feature-section-head {
  margin-bottom: 28px;
}

.feature-section-head h2 {
  position: relative;
  padding-left: 18px;
  border-left: 4px solid var(--gold);
  font-family: var(--font-head);
  font-size: clamp(1.35rem, 2.3vw, 1.8rem);
  color: var(--navy);
}

.feature-section-head h2::after {
  content: "";
  position: absolute;
  left: 22px;
  bottom: 2px;
  width: 64px;
  height: 2px;
  background: linear-gradient(90deg, var(--gold-bright), transparent);
}

.feature-section-head p {
  max-width: 780px;
  color: var(--ink-soft);
}

/* ---------- フォーム ---------- */
.feature-sim-form {
  display: grid;
  gap: 20px;
  padding: clamp(18px, 4vw, 32px);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
}

.feature-field label,
.feature-field legend {
  display: block;
  font-weight: 700;
  font-size: 0.94rem;
  color: var(--navy);
  margin-bottom: 8px;
}

.feature-field input[type="text"],
.feature-field select {
  width: 100%;
  max-width: 420px;
  padding: 12px 14px;
  font-size: 1rem;
  font-family: inherit;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
}

.feature-field input[type="text"]:focus,
.feature-field select:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(217, 164, 65, 0.18);
}

.feature-fieldset {
  border: none;
  padding: 0;
  margin: 0;
}

.feature-quick-chips,
.feature-check-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.feature-quick-chips button {
  padding: 7px 14px;
  font-size: 0.82rem;
  font-family: inherit;
  color: var(--ink-soft);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
}

.feature-quick-chips button:hover,
.feature-quick-chips button[aria-pressed="true"] {
  color: #fff;
  border-color: var(--navy);
  background: var(--navy-soft);
  font-weight: 700;
}

.feature-submit {
  justify-self: start;
  padding: 14px 44px;
  font-size: 1rem;
  font-weight: 700;
  font-family: inherit;
  color: #fff;
  background: linear-gradient(135deg, var(--navy-soft), var(--navy));
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

.feature-submit:hover {
  background: var(--gold);
}

.feature-db-help {
  margin: 8px 0 0;
  font-size: 0.76rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

/* ---------- 結果表示 ---------- */
.feature-sim-result {
  margin-top: 28px;
  padding: clamp(18px, 4vw, 30px);
  background: #fff;
  border: 1px solid var(--gold-bright);
  border-radius: 10px;
}

.feature-result-title {
  color: var(--navy);
  font-family: var(--font-head);
  margin: 0 0 14px;
}

.feature-result-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 14px 0;
}

@media (min-width: 760px) {
  .feature-result-cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-result-card {
  padding: 18px;
  background: #f6f3ea;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.feature-result-card h4 {
  margin-bottom: 6px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--ink-soft);
  letter-spacing: 0.06em;
}

.feature-result-card strong {
  display: block;
  font-size: 1.28rem;
  font-weight: 800;
  color: var(--navy);
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.feature-result-card .feature-card-sub {
  display: block;
  margin-top: 4px;
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

.feature-result-note {
  font-size: 0.8rem;
  line-height: 1.8;
  color: var(--ink-soft);
  border-left: 3px solid var(--gold);
  padding-left: 12px;
  margin: 20px 0 6px;
}

.feature-result-note a {
  color: var(--navy-soft);
}

.feature-result-error {
  margin-top: 14px;
  color: #a4402f;
  font-size: 0.9rem;
}

.feature-share-hint {
  margin: 14px 0 0;
  font-size: 0.76rem;
  color: var(--ink-soft);
}

/* ---------- 比較カード（プラットフォームDB） ---------- */
.feature-db-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

@media (min-width: 880px) {
  .feature-db-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

.feature-db-card {
  padding: 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.feature-db-card-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}

.feature-db-card-head h3 {
  margin: 0;
  font-size: 1.05rem;
  font-family: var(--font-head);
  color: var(--navy);
}

.feature-db-type {
  padding: 2px 10px;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--gold);
  background: var(--gold-pale);
  border-radius: 999px;
  white-space: nowrap;
}

.feature-db-fee {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--gold);
  margin: 0;
}

.feature-db-fee strong {
  font-size: 1.08rem;
  color: var(--navy);
}

.feature-db-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.feature-db-tags li {
  padding: 3px 10px;
  font-size: 0.72rem;
  color: var(--ink-soft);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 999px;
}

.feature-db-tags li.feature-tag-free {
  color: #1f7a45;
  font-weight: 700;
  background: #e9f4ed;
  border-color: #bfdcc9;
}

.feature-db-tags li.feature-tag-check {
  color: #b1500f;
  border-color: #e0b089;
}

.feature-db-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  font-size: 0.76rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

.feature-db-notes {
  margin: 0;
  font-size: 0.78rem;
  color: var(--ink-soft);
  line-height: 1.7;
  border-left: 2px solid var(--line);
  padding-left: 10px;
}

.feature-db-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: auto;
}

/* 公式リンクのフォールバックCTA（shukatsu-agent の agent-ad--pending 相当） */
.feature-db-official {
  display: inline-block;
  padding: 9px 20px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--gold);
  border: 1px solid var(--gold-bright);
  border-radius: 6px;
}

.feature-db-official:hover {
  color: #fff;
  background: var(--gold);
}

.feature-db-source {
  display: inline-block;
  padding: 9px 14px;
  font-size: 0.8rem;
  color: var(--ink-soft);
  border: 1px solid var(--line);
  border-radius: 6px;
}

.feature-db-source:hover {
  color: var(--navy);
  border-color: var(--navy-soft);
}

.feature-db-count {
  margin: 16px 0 12px;
  font-size: 0.85rem;
  color: var(--gold);
  font-weight: 600;
}

.feature-db-error {
  color: #a4402f;
  font-size: 0.9rem;
}

.feature-db-note {
  margin-top: 14px;
  font-size: 0.78rem;
  color: var(--ink-soft);
}

/* ---------- 診断結果の制度リスト ---------- */
.feature-plan-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.feature-plan-item {
  padding: 16px 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.feature-plan-item p {
  margin: 4px 0 0;
  font-size: 0.84rem;
  color: var(--ink-soft);
  line-height: 1.75;
}

.feature-plan-item h4 {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-size: 0.95rem;
  color: var(--navy);
}

.feature-plan-cat {
  flex: none;
  padding: 1px 8px;
  font-size: 0.68rem;
  font-weight: 700;
  border-radius: 4px;
  color: #fff;
  background: var(--navy-soft);
}

.feature-plan-cat[data-cat="tax"] {
  background: var(--gold);
}

.feature-plan-cat[data-cat="subsidy"] {
  background: #1f7a45;
}

.feature-plan-actions {
  margin-top: 8px;
}

.feature-plan-actions a {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--gold);
}

/* ---------- 相談窓口ガイド ---------- */
.feature-guide-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 18px;
}

@media (min-width: 860px) {
  .feature-guide-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-guide-card {
  display: block;
  padding: 22px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
}

.feature-guide-card:hover {
  border-color: var(--gold-bright);
}

.feature-guide-card span {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.feature-guide-card h3 {
  color: var(--navy);
  margin: 8px 0 8px;
  font-family: var(--font-head);
}

.feature-guide-card p {
  margin: 0 0 10px;
  font-size: 0.86rem;
  color: var(--ink-soft);
  line-height: 1.75;
}

.feature-guide-card a {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--gold);
}

.feature-guide-standby {
  margin: 14px 0 0;
  padding: 12px 16px;
  font-size: 0.8rem;
  line-height: 1.8;
  color: var(--ink-soft);
  background: #fff;
  border: 1px dashed var(--line);
  border-radius: 8px;
}

/* ---------- 使い方・関連記事 ---------- */
.feature-howto-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 860px) {
  .feature-howto-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-howto-card {
  display: block;
  padding: 22px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
}

.feature-howto-card:hover {
  border-color: var(--gold-bright);
}

.feature-howto-card h3 {
  color: var(--navy);
  margin: 8px 0;
  font-family: var(--font-head);
}

.feature-howto-card p {
  margin: 0;
  font-size: 0.87rem;
  color: var(--ink-soft);
}

.feature-howto-step {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.feature-howto-link {
  margin-top: 16px;
}

.feature-howto-link a {
  color: var(--gold);
  font-weight: 700;
}

/* ---------- 関連記事 ---------- */
.feature-related {
  margin: 26px 0 8px;
}

.feature-related h3 {
  color: var(--navy);
  font-family: var(--font-head);
}

.feature-related ul {
  list-style: none;
  display: grid;
  gap: 8px;
  padding: 0;
  margin: 10px 0 0;
}

.feature-related li a {
  display: block;
  padding: 10px 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 0.9rem;
  color: var(--navy-soft);
}

.feature-related li a:hover {
  border-color: var(--gold-bright);
  color: var(--gold);
}

/* ---------- about ページ ---------- */
.feature-about {
  padding: clamp(40px, 6vw, 70px) 0;
}

.feature-about article {
  max-width: 820px;
  margin: 0 auto;
}

.feature-about h1 {
  font-family: var(--font-head);
  font-size: clamp(1.55rem, 3vw, 2.1rem);
  color: var(--navy);
}

.feature-about h2 {
  margin-top: 2.2rem;
  padding-left: 14px;
  border-left: 4px solid var(--gold);
  font-family: var(--font-head);
  font-size: 1.22rem;
  color: var(--navy);
}

.feature-about h3 {
  margin-top: 1.6rem;
  font-size: 1.02rem;
  color: var(--navy);
}

.feature-about h4 {
  margin-top: 1.3rem;
  font-size: 0.95rem;
  color: var(--navy);
}

.feature-about table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  margin: 0.8rem 0 1.4rem;
}

.feature-about th,
.feature-about td {
  padding: 9px 12px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  line-height: 1.7;
}

.feature-about th {
  background: var(--gold-pale);
  white-space: nowrap;
}

.feature-about code {
  padding: 2px 8px;
  font-size: 0.85em;
  background: #f0ede4;
  border: 1px solid var(--line);
  border-radius: 4px;
}

.feature-benef-table-wrap {
  overflow-x: auto;
}

.feature-source-list {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 8px;
}

.feature-source-list li {
  padding: 10px 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 0.84rem;
  line-height: 1.8;
  word-break: break-all;
}

.feature-source-list a {
  color: var(--navy-soft);
}

.feature-about-note {
  font-size: 0.8rem;
  color: var(--ink-soft);
}

/* ---------- レスポンシブ ---------- */
@media (max-width: 800px) {
  .feature-hero {
    min-height: 340px;
  }

  .feature-hero-title {
    font-size: clamp(1.5rem, 7.4vw, 2.1rem);
    overflow-wrap: anywhere;
  }

  .feature-hero-sub {
    font-size: 0.9rem;
  }

  .feature-field input[type="text"],
  .feature-field select {
    max-width: none;
  }
}

@media (max-width: 420px) {
  .feature-hero {
    min-height: 320px;
  }

  .feature-ribbon {
    top: 12px;
    right: 12px;
    padding: 4px 12px;
    font-size: 0.7rem;
  }

  .feature-submit {
    width: 100%;
  }
}