/* ============================================================
   WHITEPAPER（お役立ち資料）一覧・詳細
   読み込み順：reset → tokens → style → pages → whitepaper
   pages.css の .form_* / .page_lead / .page_section_head を流用
============================================================ */

/* ---------- 一覧 ---------- */
.wp_section {
  padding: 56px 0 96px;
  background: var(--bg, #fff);
}
@media (min-width: 768px) { .wp_section { padding: 72px 0 120px; } }

.wp_series_head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px 64px;
  align-items: end;
  margin-bottom: 40px;
}
@media (min-width: 900px) {
  .wp_series_head { grid-template-columns: minmax(0, 1fr) 380px; margin-bottom: 56px; }
}
.wp_series_head .page_section_head { margin-bottom: 0; border-bottom: none; padding-bottom: 0; }
.wp_series_head { padding-bottom: 28px; border-bottom: 1px solid var(--text); }
.wp_series_head h2 { word-break: keep-all; }
.wp_series_desc {
  font-family: var(--font-body);
  font-size: var(--fs-body-s);
  line-height: var(--lh-body);
  color: var(--text-sub);
  padding-bottom: 6px;
}

.wp_grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 40px 32px;
}
@media (max-width: 1140px) { .wp_grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 48px 32px; } }
@media (max-width: 640px) { .wp_grid { grid-template-columns: 1fr; gap: 48px; } }

.wp_card {
  display: flex;
  flex-direction: column;
}
.wp_card_cover {
  display: block;
  text-decoration: none;
}
.wp_card_cover .wp_cover { transition: transform 0.5s var(--ease-out, ease), box-shadow 0.5s var(--ease-out, ease); }
.wp_card_cover:hover .wp_cover { transform: translateY(-3px); box-shadow: 0 18px 40px rgba(3, 17, 62, 0.16); }

.wp_card_body { display: flex; flex-direction: column; flex: 1; padding-top: 22px; }
.wp_card_series {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-body);
  font-size: var(--fs-label);
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.wp_card_series .num {
  font-family: var(--font-en);
  font-style: italic;
  font-size: 22px;
  line-height: 1;
  color: var(--accent-fill);
}
.wp_card_title {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 500;
  letter-spacing: var(--ls-head);
  line-height: var(--lh-head);
  color: var(--text);
}
.wp_card_title a { color: inherit; text-decoration: none; }
.wp_card_title a:hover { color: var(--accent-text); }
.wp_card_sub {
  margin-top: 8px;
  font-family: var(--font-body);
  font-size: var(--fs-caption);
  line-height: 1.8;
  color: var(--text-sub);
}
.wp_card_meta, .wp_detail_meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}
.wp_card_body .wp_card_sub { margin-bottom: 18px; }
.wp_card_body .wp_card_meta { margin-top: auto; }
.wp_card_meta span, .wp_detail_meta span {
  font-family: var(--font-body);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--accent-text);
  background: var(--blue-100);
  padding: 4px 10px;
  white-space: nowrap;
}
.wp_card_btn {
  margin-top: 20px;
  align-self: flex-start;
  min-width: 0;
  padding: 14px 26px;
  font-size: var(--fs-caption);
}
@media (max-width: 640px) { .wp_card_btn { align-self: stretch; justify-content: center; } }

/* ---------- 表紙（画像 or HTMLフォールバック） ---------- */
.wp_cover {
  position: relative;
  margin: 0;
  aspect-ratio: 16 / 9;
  background: var(--navy-900);
  border: 1px solid var(--line);
  overflow: hidden;
  box-shadow: 0 10px 28px rgba(3, 17, 62, 0.1);
}
.wp_cover img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.wp_cover_fallback {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 10px;
  padding: 8% 9%;
  background:
    linear-gradient(to right, rgba(255, 255, 255, 0.04) 1px, transparent 1px) 0 0 / 12.5% 100%,
    linear-gradient(160deg, var(--navy-900) 0%, var(--navy-800) 100%);
  color: var(--on-dark);
}
.wp_cover_fallback::before {
  content: "";
  position: absolute;
  left: 9%;
  right: 9%;
  bottom: 14%;
  height: 1px;
  background: var(--line-on-dark);
}
.wp_cover_series {
  font-family: var(--font-en);
  font-style: italic;
  font-size: clamp(10px, 1.2vw, 13px);
  letter-spacing: 0.22em;
  color: var(--accent-on-dark);
}
.wp_cover_title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(15px, 2vw, 26px);
  letter-spacing: 0.06em;
  line-height: 1.45;
  text-wrap: balance;
  max-width: 20em;
}
.wp_cover_sub {
  font-family: var(--font-body);
  font-size: clamp(9px, 1vw, 12px);
  letter-spacing: 0.04em;
  color: var(--on-dark-sub);
}
.wp_cover_brand {
  position: absolute;
  left: 9%;
  bottom: 7%;
  font-family: var(--font-body);
  font-size: clamp(8px, 0.9vw, 11px);
  letter-spacing: 0.12em;
  color: var(--on-dark-sub);
}
.wp_cover--lg .wp_cover_title { font-size: clamp(20px, 3vw, 34px); }
.wp_cover--lg .wp_cover_sub { font-size: clamp(11px, 1.3vw, 14px); }
.wp_cover--lg .wp_cover_series { font-size: clamp(11px, 1.4vw, 14px); }

/* ---------- 詳細 ---------- */
.wp_detail {
  padding: 48px 0 96px;
  background: var(--bg, #fff);
}
@media (min-width: 768px) { .wp_detail { padding: 64px 0 128px; } }

.wp_detail_grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: start;
}
@media (min-width: 1000px) {
  .wp_detail_grid { grid-template-columns: minmax(0, 1fr) 420px; gap: 72px; }
}
@media (min-width: 1200px) {
  .wp_detail_grid { grid-template-columns: minmax(0, 1fr) 460px; gap: 96px; }
}

.wp_detail_eyebrow {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 18px;
}
.wp_detail_eyebrow .en {
  font-family: var(--font-en);
  font-style: italic;
  font-size: 14px;
  letter-spacing: 0.22em;
  color: var(--accent-text);
}
.wp_detail_eyebrow .series {
  font-family: var(--font-en);
  font-style: italic;
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  padding-left: 14px;
  border-left: 1px solid var(--line);
}
.wp_detail_title {
  font-family: var(--font-display);
  font-size: var(--fs-h1);
  font-weight: 500;
  letter-spacing: var(--ls-head);
  line-height: var(--lh-tight);
  color: var(--text);
  text-wrap: pretty;
}
.wp_detail_sub {
  margin-top: 14px;
  font-family: var(--font-body);
  font-size: var(--fs-body-l);
  line-height: 1.8;
  color: var(--text-sub);
}
.wp_detail_meta { margin-top: 20px; }
.wp_detail .wp_cover--lg { margin-top: 32px; }
.wp_detail_lead {
  margin-top: 32px;
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--text-sub);
  text-wrap: pretty;
}

.wp_block { margin-top: 56px; }
.wp_block_title {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding-bottom: 14px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--text);
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 500;
  letter-spacing: var(--ls-head);
  color: var(--text);
}
.wp_block_title .en {
  font-family: var(--font-en);
  font-style: italic;
  font-size: 14px;
  letter-spacing: 0.22em;
  color: var(--accent-text);
}

.wp_who { list-style: none; }
.wp_who li {
  position: relative;
  padding: 10px 0 10px 22px;
  font-family: var(--font-body);
  font-size: var(--fs-body-s);
  line-height: 1.8;
  color: var(--text);
}
.wp_who li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.25em;
  width: 10px;
  height: 1px;
  background: var(--accent-text);
}

.wp_toc { list-style: none; border-top: 1px solid var(--line-soft); }
.wp_toc li {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 16px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--font-body);
  font-size: var(--fs-body-s);
  line-height: 1.7;
  color: var(--text);
}
.wp_toc_num {
  font-family: var(--font-en);
  font-style: italic;
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--accent-text);
  white-space: nowrap;
}
.wp_toc_note {
  margin-top: 14px;
  font-family: var(--font-body);
  font-size: var(--fs-label);
  line-height: 1.7;
  color: var(--text-muted);
}

.wp_series_list { display: grid; gap: 12px; }
.wp_series_item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 20px;
  padding: 18px 22px;
  border: 1px solid var(--line);
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.3s ease, background 0.3s ease;
}
.wp_series_item:hover { border-color: var(--accent-text); background: var(--navy-050); }
.wp_series_item_num {
  font-family: var(--font-en);
  font-style: italic;
  font-size: 18px;
  color: var(--accent-fill);
  white-space: nowrap;
}
.wp_series_item_body { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.wp_series_item_title {
  font-family: var(--font-display);
  font-size: var(--fs-body-l);
  font-weight: 500;
  letter-spacing: 0.04em;
  line-height: 1.5;
}
.wp_series_item_role { font-family: var(--font-body); font-size: var(--fs-label); color: var(--text-muted); }
.wp_series_item_arrow { font-size: 18px; color: var(--accent-text); transition: transform 0.35s cubic-bezier(.2,.6,.2,1); }
.wp_series_item:hover .wp_series_item_arrow { transform: translateX(6px); }

/* ---------- 右：3ステップフォーム ---------- */
.wp_detail_side { position: relative; }
@media (min-width: 1000px) {
  .wp_detail_side { position: sticky; top: 112px; }
}
.wp_form_card {
  background: #fafbfe;
  border: 1px solid var(--line);
  padding: 28px 24px 32px;
}
@media (min-width: 768px) { .wp_form_card { padding: 36px 36px 40px; } }
.wp_form_intro {
  font-family: var(--font-body);
  font-size: var(--fs-body-s);
  line-height: 1.8;
  color: var(--text);
  margin-bottom: 24px;
}
.wp_form { display: block; }

.wp_steps {
  display: flex;
  align-items: center;
  gap: 16px;
  padding-bottom: 24px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--line);
}
.wp_steps_label {
  font-family: var(--font-body);
  font-size: var(--fs-label);
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--text);
}
.wp_steps_list { list-style: none; display: flex; align-items: center; gap: 8px; }
.wp_steps_dot {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--white);
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}
.wp_steps_dot.is-current { background: var(--navy-900); border-color: var(--navy-900); color: #fff; }
.wp_steps_dot.is-done { border-color: var(--navy-900); color: var(--navy-900); font-size: 0; }
.wp_steps_dot.is-done::before { content: "✓"; font-size: 12px; }

.wp_field { display: block; margin-bottom: 20px; }
.wp_field .form_label { margin-bottom: 8px; font-size: var(--fs-caption); }
.wp_field_note {
  margin: -4px 0 8px;
  font-family: var(--font-body);
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--text-muted);
}
.wp_field .form_input, .wp_field .form_select { padding: 13px 14px; }
.wp_fieldset { border: 0; padding: 0; margin: 0 0 20px; min-width: 0; }
.wp_fieldset legend { margin-bottom: 10px; }

.wp_checks { display: grid; gap: 6px; }
.wp_check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 8px 0;
  font-family: var(--font-body);
  font-size: var(--fs-body-s);
  line-height: 1.7;
  color: var(--text);
  cursor: pointer;
}
.wp_check input[type="checkbox"] {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  border: 1px solid var(--line-color, #d5dae5);
  border-radius: 0;
  -webkit-appearance: none;
  appearance: none;
  background: var(--white-color, #fff);
  cursor: pointer;
  position: relative;
  transition: border-color .3s ease, background .3s ease;
}
.wp_check input[type="checkbox"]:hover { border-color: var(--navy-900); }
.wp_check input[type="checkbox"]:checked {
  background: var(--navy-900);
  border-color: var(--navy-900);
}
.wp_check input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  left: 5px; top: 1px;
  width: 5px; height: 10px;
  border-right: 2px solid #fff;
  border-bottom: 2px solid #fff;
  transform: rotate(45deg);
}
.wp_check a { color: var(--accent-text); text-decoration: underline; text-underline-offset: 3px; }
.wp_check--privacy { padding-top: 6px; border-top: 1px solid var(--line-soft); margin-top: 6px; }

.wp_form_actions { display: grid; gap: 10px; margin-top: 28px; }
.wp_btn { width: 100%; justify-content: center; }
.wp_form .form_btn--ghost { min-width: 0; }

/* ---------- 関連コンテンツ ---------- */
.wp_related {
  padding: 72px 0 104px;
  background: var(--bg-tint, #F1F3F8);
}
@media (min-width: 768px) { .wp_related { padding: 96px 0 128px; } }
.wp_related_grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 40px 32px;
}
@media (max-width: 1000px) { .wp_related_grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .wp_related_grid { grid-template-columns: 1fr; gap: 48px; } }
.wp_related_link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 20px;
  align-self: flex-start;
  font-family: var(--font-body);
  font-size: var(--fs-caption);
  letter-spacing: 0.08em;
  color: var(--accent-text);
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 1px solid currentColor;
}
.wp_related_link span { transition: transform 0.35s cubic-bezier(.2,.6,.2,1); }
.wp_related_link:hover span { transform: translateX(6px); }

.wp_section--next { padding-top: 0; }
.wp_card_series .num + * { margin-left: 0; }

/* ---------- 一覧：カテゴリへのジャンプ ---------- */
.wp_tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border: 1px solid var(--line);
  width: fit-content;
  max-width: 100%;
  margin: 0 auto;
}
.wp_tabs a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 28px;
  font-family: var(--font-display);
  font-size: var(--fs-body-l);
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--text);
  text-decoration: none;
  transition: background 0.3s ease, color 0.3s ease;
}
.wp_tabs a + a { border-left: 1px solid var(--line); }
.wp_tabs a:hover { background: var(--navy-900); color: #fff; }
.wp_tabs a .count {
  font-family: var(--font-en);
  font-style: italic;
  font-size: 15px;
  color: var(--accent-text);
}
.wp_tabs a:hover .count { color: var(--accent-on-dark); }
@media (max-width: 560px) {
  .wp_tabs { width: 100%; }
  .wp_tabs a { flex: 1 1 100%; justify-content: space-between; }
  .wp_tabs a + a { border-left: none; border-top: 1px solid var(--line); }
}
.wp_tabs_wrap { padding: 0 0 8px; }
.wp_section { scroll-margin-top: 96px; }

/* ---------- 詳細：SP/タブレットでフォームへジャンプ ---------- */
.wp_jump {
  display: none;
  margin-top: 24px;
  width: 100%;
  justify-content: center;
}
@media (max-width: 999px) { .wp_jump { display: inline-flex; } }
.wp_detail_side { scroll-margin-top: 96px; }

/* ---------- 関連資料ストリップ（事業ページ等からの導線） ----------
   pages.css に依存しない自己完結コンポーネント。
   白地＋細罫の編集的なトーンで、バナーより控えめに置く */
.wp_strip {
  background: var(--bg, #fff);
  padding: 64px 0 72px;
}
@media (min-width: 768px) { .wp_strip { padding: 80px 0 96px; } }
@media (min-width: 1080px) { .wp_strip { padding: 88px 0 104px; } }

.wp_strip_inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px 80px;
  padding-top: 32px;
  border-top: 1px solid var(--text);
  align-items: start;
}
@media (min-width: 1000px) {
  .wp_strip_inner { grid-template-columns: 320px minmax(0, 1fr); padding-top: 40px; }
}

.wp_strip_eyebrow {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 18px;
}
.wp_strip_eyebrow .en {
  font-family: var(--font-en);
  font-style: italic;
  font-size: 14px;
  letter-spacing: 0.22em;
  color: var(--accent-text);
}
.wp_strip_eyebrow .jp {
  font-family: var(--font-body);
  font-size: var(--fs-label);
  letter-spacing: 0.12em;
  color: var(--text-muted);
}
.wp_strip_title {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 500;
  letter-spacing: var(--ls-head);
  line-height: var(--lh-head);
  color: var(--text);
  text-wrap: pretty;
}
@media (min-width: 768px) { .wp_strip_title { font-size: 25px; } }
.wp_strip_lead {
  margin-top: 16px;
  font-family: var(--font-body);
  font-size: var(--fs-body-s);
  line-height: var(--lh-body);
  color: var(--text-sub);
}
.wp_strip_all {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 26px;
  font-family: var(--font-body);
  font-size: var(--fs-caption);
  letter-spacing: 0.08em;
  color: var(--accent-text);
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 1px solid currentColor;
}
.wp_strip_all span { transition: transform 0.35s cubic-bezier(.2,.6,.2,1); }
.wp_strip_all:hover span { transform: translateX(6px); }

.wp_strip_list { display: flex; flex-direction: column; }
.wp_strip_item {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr) auto;
  align-items: center;
  gap: 20px;
  padding: 18px 4px;
  border-bottom: 1px solid var(--line-soft);
  text-decoration: none;
}
.wp_strip_item:first-child { border-top: 1px solid var(--line-soft); }
@media (min-width: 1000px) {
  .wp_strip_item:first-child { border-top: none; padding-top: 6px; }
}
@media (min-width: 768px) {
  .wp_strip_item { grid-template-columns: 150px minmax(0, 1fr) auto; gap: 28px; padding: 22px 6px; }
}
.wp_strip_thumb {
  margin: 0;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 6px 16px rgba(3, 17, 62, 0.08);
  transition: transform 0.5s var(--ease-out, ease), box-shadow 0.5s var(--ease-out, ease);
}
.wp_strip_thumb img { display: block; width: 100%; height: 100%; object-fit: cover; }
.wp_strip_item:hover .wp_strip_thumb { transform: translateY(-3px); box-shadow: 0 14px 28px rgba(3, 17, 62, 0.14); }
.wp_strip_item_series {
  font-family: var(--font-en);
  font-style: italic;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--text-muted);
  margin-bottom: 6px;
}
.wp_strip_item_title {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.04em;
  line-height: 1.55;
  color: var(--text);
  transition: color 0.3s ease;
}
.wp_strip_item:hover .wp_strip_item_title { color: var(--accent-text); }
.wp_strip_item_sub {
  margin-top: 5px;
  font-family: var(--font-body);
  font-size: var(--fs-label);
  line-height: 1.7;
  color: var(--text-muted);
}
.wp_strip_item_arrow {
  font-size: 18px;
  color: var(--accent-text);
  transition: transform 0.35s cubic-bezier(.2,.6,.2,1);
}
.wp_strip_item:hover .wp_strip_item_arrow { transform: translateX(6px); }
@media (max-width: 560px) {
  .wp_strip_item { grid-template-columns: 100px minmax(0, 1fr); gap: 16px; }
  .wp_strip_item_arrow { display: none; }
  .wp_strip_item_sub { display: none; }
}