/*
 * 2026年デザインリニューアル用スタイル
 * coding2026/styles.css をそのまま取り込み（画像パスのみテーマ内に変更）
 */
/* ===================== Reset & base ===================== */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  color: #1b2733;
  background: #fff;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
img { max-width: 100%; display: block; }
section { position: relative; }

:root {
  --blue-900: #0b3f9e;
  --blue-800: #0d4fb8;
  --blue-700: #236db3;
  --blue-600: #2f7fee;
  --blue-500: #4a95f5;
  --blue-100: #eaf3ff;
  --yellow: #f5c542;
  --orange-600: #f2994a;
  --ink: #16233a;
  --card-bg: #ffffff;
}

.wrap { max-width: 640px; margin: 0 auto; }

:root { --container: 1180px; }

.ph-photo { aspect-ratio: 16/10; width: 100%; }

/* ===================== buttons ===================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-weight: 700;
  font-size: 21.5px;
  padding: 15px 26px;
  border-radius: 999px;
  transition: opacity .15s ease, transform .15s ease, filter .15s ease;
}
.btn:active { transform: scale(.98); }
@media (hover: hover) {
  .btn:hover, .faq-btn:hover { filter: brightness(.92); }
}
.btn .arrow { font-weight: 700; }
.btn-primary {
  color: #fff;
  background: linear-gradient(90deg, #17b2c4 0%, #1f7ef0 100%);
  box-shadow: 0 8px 20px rgba(20,97,214,.35);
  width: 100%;
  max-width: 340px;
}
.btn-outline-white {
  color: #fff;
  border: 2px solid #fff;
  background: transparent;
  width: 100%;
  max-width: 460px;
}
.btn-cta {
  color: var(--ink);
  background: linear-gradient(90deg, #ffe17a 0%, var(--yellow) 100%);
  width: 100%;
  max-width: 340px;
}
.btn-center { display: flex; margin: 0 auto; }

/* ===================== HEADER ===================== */
.site-header {
  padding: 16px 12px 24px;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: transparent;
}
.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
  position: relative;
}
.site-logo {
  display: none;
  flex: none;
}
.site-logo img { display: block; height: 26px; width: auto; }
.nav-buttons {
  display: flex;
  gap: 8px;
  flex: 1;
}
.nav-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1.6px solid var(--blue-700);
  background: #fff;
  color: var(--blue-800);
  font-weight: 700;
  font-size: 16.5px;
  padding: 10px 6px;
  border-radius: 10px;
  white-space: nowrap;
  box-shadow: 0 2px 6px rgba(11,63,158,.12);
  transition: background .15s ease, color .15s ease;
}
.nav-icon { width: 16px; height: 16px; flex: none; }

.hamburger-btn {
  flex: none;
  margin-left: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  width: 38px;
  height: 38px;
  border: 1.6px solid var(--blue-700);
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 2px 6px rgba(11,63,158,.12);
  cursor: pointer;
}
.hamburger-btn span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--blue-800);
  border-radius: 2px;
  transition: transform .2s ease, opacity .2s ease;
}
.hamburger-btn.is-active span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.hamburger-btn.is-active span:nth-child(2) { opacity: 0; }
.hamburger-btn.is-active span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.site-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 8px;
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 12px 32px rgba(11,63,158,.2);
  padding: 8px;
  display: flex;
  flex-direction: column;
  min-width: 220px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity .18s ease, transform .18s ease, visibility .18s ease;
  z-index: 109;
}
.site-menu.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.site-menu a {
  padding: 12px 14px;
  font-weight: 700;
  font-size: 15px;
  color: var(--ink);
  border-radius: 10px;
  white-space: nowrap;
}
.site-menu a:hover { background: var(--blue-100); color: var(--blue-800); }

/* ===================== HERO ===================== */
.hero {
  background: url("../img/2026/11.png") center top / cover no-repeat, linear-gradient(180deg, #dbeaff 0%, #3d84f0 55%, #1e5fd6 100%);
  padding: 84px 12px 36px;
  text-align: left;
  overflow: hidden;
}
.hero-inner {
  margin-top: 20px;
  max-width: var(--container);
  margin: 0 auto;
}
.hero-top {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 6px;
}
.hero-text { flex: 1; min-width: 0; }
.hero-bubble {
  display: inline-block;
  background: #fff;
  color: var(--blue-800);
  font-weight: 700;
  font-size: 16.5px;
  padding: 6px 13px;
  border-radius: 999px;
  margin-bottom: 10px;
}
.hero-title {
  font-size: 33.5px;
  font-weight: 800;
  color: var(--blue-900);
  line-height: 1.3;
}
.hero-brand-box {
  display: inline-flex;
  align-items: baseline;
  /* 左の .05em は日本語グリフの左サイドベアリングに合わせてロゴの左端を揃える */
  margin: 6px 4px 6px .05em;
}
.hero-brand-logo { display: block; width: 104px; height: auto; position: relative; top: 4px; }
.hero-title-suffix { font-size: 33.5px; font-weight: 800; color: var(--blue-900); }
.hero-title2 {
  font-size: 33.5px;
  font-weight: 800;
  color: var(--blue-900);
  margin-top: 4px;
}

.hero-phone {
  position: relative;
  flex: 0 0 34%;
  max-width: 160px;
}
.hero-phone-img {
  display: block;
  width: 100%;
  height: auto;
  filter: drop-shadow(0 14px 22px rgba(11,63,158,.35));
}
.sparkle { position: absolute; background: #fff; border-radius: 2px; }
.sparkle.s1 { width: 3px; height: 20px; top: -18px; right: 30px; transform: rotate(20deg); }
.sparkle.s2 { width: 3px; height: 14px; top: -10px; right: 10px; transform: rotate(20deg); }
.sparkle.s3 { width: 3px; height: 26px; top: -22px; right: -6px; transform: rotate(20deg); }

.hero-people {
  width: 100%;
  height: auto;
  display: block;
  margin-top: 22px;
  filter: drop-shadow(0 10px 18px rgba(11,63,158,.25));
}

.hero-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-top: 22px;
}
.hero-card {
  background: #fff;
  border-radius: 14px;
  padding: 18px 10px 16px;
  text-align: center;
  box-shadow: 0 6px 16px rgba(11,63,158,.18);
  transition: transform .2s ease, box-shadow .2s ease;
}
.hero-card-icon { width: 60px; height: 60px; display: block; object-fit: contain; margin: 0 auto 10px; }
.hero-card-title { font-weight: 700; font-size: 18.5px; color: var(--blue-900); margin-bottom: 6px; }
.hero-card-desc { font-size: 15.5px; color: #46536a; border-top: 2px solid var(--yellow); padding-top: 6px; display: inline-block; }

/* ===================== AMBASSADOR ===================== */
.ambassador {
  background: #fbfaf6;
  padding: 36px 20px;
}
.ambassador-inner {
  max-width: var(--container);
  margin: 0 auto;
}
.amb-title { font-size: 25.5px; font-weight: 800; margin-bottom: 16px; line-height: 1.5; }
.amb-photo {
  margin-bottom: 8px;
  overflow: hidden;
  border-radius: 14px;
  box-shadow: 0 6px 16px rgba(11,63,158,.14);
}
.amb-photo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.amb-photo--sm { margin-top: 22px; }
.amb-caption { font-size: 15.5px; color: #5b6472; margin-bottom: 4px; }
.amb-lead { font-size: 20px; font-weight: 700; margin: 26px 0 14px; }
.amb-quote-tag {
  display: inline-block;
  border: 1.5px solid #b9bec7;
  border-radius: 999px;
  font-size: 16.5px;
  font-weight: 700;
  padding: 7px 14px;
  margin-bottom: 12px;
}
.amb-quote { font-size: 19.5px; color: #2c3646; }

/* ===================== STORY SECTION ===================== */
.story { background: #eef4ff; padding: 0 0 40px; }

.story-hero {
  padding: 30px 20px 34px;
  color: var(--ink);
}
.story-hero-inner {
  max-width: var(--container);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 22px;
}
.story-hero-text { text-align: center; }
.story-hero-tag {
  display: inline-block;
  background: var(--blue-100);
  color: var(--blue-700);
  border-radius: 999px;
  font-size: 16px;
  font-weight: 700;
  padding: 6px 14px;
  margin-bottom: 12px;
  width: fit-content;
  margin-left: auto;
  margin-right: auto;
}
.story-hero-title { font-size: 37.5px; font-weight: 800; line-height: 1.4; margin-bottom: 12px; color: var(--blue-900); }
.story-hero-desc { font-size: 18px; color: #46536a; margin-bottom: 18px; }
.story-hero-photo-col { display: flex; flex-direction: column; }
.story-hero-photo {
  aspect-ratio: 1/1;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 10px 26px rgba(11,63,158,.16);
}
.story-hero-photo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.story-hero-note { font-size: 12px; color: #9aa4b2; text-align: right; margin-top: 6px; }

.story-body-section { background: #eef4ff; padding: 40px 0; }

.story-body {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 16px;
}
.compare-card, .future-block, .origin-block {
  margin: 22px 0 0;
  background: #fff;
  border-radius: 16px;
  padding: 20px 16px;
  box-shadow: 0 4px 18px rgba(20,97,214,.08);
}

.badge {
  display: inline-block;
  color: #fff;
  font-weight: 700;
  font-size: 18px;
  padding: 8px 20px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.badge-before { background: var(--blue-700); }
.badge-after { background: var(--blue-700); }
.badge-origin { background: var(--blue-900); }

.compare-person {
  height: 140px;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.compare-person img { width: 100%; height: 100%; object-fit: contain; display: block; }
.compare-list { display: flex; flex-direction: column; gap: 14px; margin-bottom: 16px; }
.compare-list li {
  display: flex;
  gap: 10px;
  font-size: 18.5px;
  font-weight: 700;
  color: #22304a;
  align-items: flex-start;
}
.x-mark {
  flex: none;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--blue-600);
  color: #fff;
  font-size: 14.5px;
  line-height: 1;
  margin-top: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.compare-divider { height: 1px; background: #e3e7ee; margin: 16px 0; }
.compare-solution { font-size: 18.5px; font-weight: 700; color: var(--blue-800); }

.future-title { font-size: 25.5px; font-weight: 800; margin-bottom: 20px; line-height: 1.5; }

.steps-3 { display: flex; flex-direction: column; gap: 18px; }
.step-arrow { display: none; }
.step-3-card {
  background: #f5f8fd;
  border-radius: 14px;
  padding: 18px 16px;
  text-align: center;
}
.step-3-icon { display: block; width: 140px; height: 140px; margin: 0 auto 10px; }
.step-3-icon img { width: 100%; height: 100%; object-fit: contain; display: block; }
.step-3-card h4 { font-size: 20px; font-weight: 800; color: var(--ink); margin-bottom: 8px; }
.step-3-desc { font-size: 16.5px; color: #3b4a63; }

.origin-row {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 18px;
}
.origin-lead { font-size: 19px; font-weight: 700; color: #2c3646; }

.origin-formula {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  background: #f5f8fd;
  border-radius: 14px;
  padding: 24px 16px;
}
.origin-formula-item { text-align: center; }
.origin-formula-icon { width: 56px; height: 56px; margin: 0 auto 10px; display: flex; align-items: center; justify-content: center; }
.origin-formula-icon img { width: 100%; height: 100%; object-fit: contain; display: block; }
.origin-formula-item p { font-size: 15.5px; font-weight: 700; color: #2c3646; }
.origin-formula-item--logo { display: flex; align-items: center; }
.plus { font-size: 29.5px; font-weight: 800; color: var(--blue-700); }

.btn-outline-blue {
  color: var(--blue-700);
  border: 2px solid var(--blue-700);
  background: #fff;
  width: 100%;
  max-width: 340px;
}

.story-cta {
  margin: 22px 0 0;
  background: rgb(233, 241, 250);
  border-radius: 16px;
  padding: 28px 20px;
  text-align: center;
}
.story-cta-top {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}
.story-cta-text { color: var(--ink); font-size: 20px; font-weight: 800; line-height: 1.6; }
.story-cta-icon { width: 64px; height: 64px; flex: none; }
.story-cta-icon img { width: 100%; height: 100%; object-fit: contain; display: block; }
.story-body > .btn-primary { margin: 26px auto 0; }

/* ===================== FEATURES ===================== */
.features { background: #eef2fb; padding: 44px 20px; }
.features-inner {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}
.features-tag {
  display: inline-block;
  color: var(--orange-600);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: .1em;
  margin-bottom: 8px;
}
.features-title { font-size: 34.5px; font-weight: 800; color: var(--blue-900); margin-bottom: 10px; }
.features-sub { font-size: 18px; color: #5b6683; margin-bottom: 28px; }

.features-list { display: flex; flex-direction: column; gap: 16px; text-align: left; }
.feature-item {
  background: #fff;
  border-radius: 16px;
  padding: 20px;
  display: flex;
  gap: 14px;
  align-items: flex-start;
  box-shadow: 0 4px 16px rgba(11,63,158,.08);
}
.feature-icon {
  flex: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.feature-icon img { width: 24px; height: 24px; object-fit: contain; display: block; }
.feature-icon--blue { background: var(--blue-100); color: var(--blue-700); }
.feature-title { font-size: 20.5px; font-weight: 800; margin-bottom: 6px; }
.feature-title--blue { color: var(--blue-700); }
.feature-body p { font-size: 17.5px; color: #46536a; }

/* ===================== HOW TO USE ===================== */
.howto {
  background: linear-gradient(180deg, #cfe3ff 0%, #3d84f0 45%, #1a5be0 100%);
  padding: 34px 20px 40px;
  text-align: center;
  color: #fff;
}
.howto-inner {
  max-width: 900px;
  margin: 0 auto;
}
.howto-tag {
  display: inline-block;
  background: rgba(255,255,255,.9);
  color: var(--blue-700);
  font-weight: 700;
  font-size: 15.5px;
  letter-spacing: .08em;
  padding: 6px 18px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.howto-title { font-size: 36px; font-weight: 800; color: var(--blue-900); margin-bottom: 14px; }
.howto-sub { font-size: 22.5px; font-weight: 700; color: var(--blue-900); margin-bottom: 10px; }
.howto-desc { font-size: 16.5px; color: var(--blue-900); opacity: .85; margin-bottom: 24px; }

.howto-intro-card {
  background: #fff;
  border-radius: 18px;
  padding: 24px 20px;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 22px;
}
.howto-intro-text h3 { font-size: 25.5px; font-weight: 800; color: var(--ink); margin-bottom: 10px; }
.howto-intro-text p { font-size: 17.5px; color: #3b4a63; margin-bottom: 16px; }
.howto-intro-media { display: flex; justify-content: center; }
.howto-intro-media .hero-phone-img { width: 150px; }

.howto-steps { display: flex; flex-direction: column; gap: 16px; margin-bottom: 26px; }
.howto-step {
  background: #fff;
  border-radius: 16px;
  padding: 18px 16px;
  display: flex;
  align-items: center;
  gap: 14px;
  text-align: left;
  transition: box-shadow .2s ease;
}
.howto-step-num {
  border: 1.5px solid var(--blue-500);
  color: var(--blue-700);
  font-size: 16px;
  font-weight: 800;
  padding: 3px 10px;
  border-radius: 999px;
  flex: none;
  align-self: flex-start;
}
.howto-step-body { flex: 1; }
.howto-step-body h4 {
  font-size: 20.5px;
  font-weight: 800;
  color: var(--ink);
  padding-bottom: 6px;
  border-bottom: 3px solid var(--yellow);
  display: inline-block;
  margin-bottom: 8px;
}
.howto-step-body p { font-size: 16.5px; color: #3b4a63; }
.howto-step-icon {
  width: 56px; height: 56px;
  border-radius: 50%;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  flex: none;
}
.howto-step-icon img { width: 100%; height: 100%; object-fit: contain; display: block; }

/* ===================== FAQ ===================== */
.faq { background: #eef4ff; padding: 40px 20px; }
.faq-inner { max-width: 720px; margin: 0 auto; text-align: center; }
.faq-tag {
  display: inline-block;
  color: var(--orange-600);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: .1em;
  margin-bottom: 8px;
}
.faq-title { font-size: 26px; font-weight: 800; color: var(--blue-900); margin-bottom: 24px; }

.faq-list { display: flex; flex-direction: column; gap: 14px; margin-bottom: 28px; text-align: left; }
.faq-item {
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 4px 14px rgba(20,97,214,.08);
  overflow: hidden;
}
.faq-question {
  list-style: none;
  cursor: pointer;
  padding: 18px 20px;
  font-weight: 700;
  font-size: 15.5px;
  color: var(--blue-900);
  display: flex;
  align-items: center;
  gap: 12px;
}
.faq-question::-webkit-details-marker { display: none; }
.faq-arrow { flex: none; color: var(--blue-900); font-size: 12px; transition: transform .2s ease; }
.faq-item[open] .faq-arrow { transform: rotate(90deg); }
.faq-answer { margin: 0; padding: 0 20px 20px 46px; font-size: 14.5px; color: #46536a; line-height: 1.7; }
.faq-answer a { color: var(--blue-700); text-decoration: underline; text-underline-offset: 2px; font-weight: 700; }
.faq-answer a:hover { color: var(--blue-900); }

.faq-actions { display: flex; flex-direction: column; gap: 12px; align-items: center; }
.faq-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 15px;
  padding: 13px 32px;
  border-radius: 999px;
  width: 100%;
  max-width: 220px;
  transition: filter .15s ease;
}
.faq-btn--outline { background: #fff; border: 1.5px solid #d5dbe5; color: var(--ink); }
.faq-btn--primary {
  background: linear-gradient(90deg, #17b2c4 0%, #1f7ef0 100%);
  color: #fff;
  box-shadow: 0 8px 20px rgba(20,97,214,.25);
}

/* ===================== CTA BANNER ===================== */
.cta-banner { background: #eef4ff; padding: 30px 20px 40px; }
.cta-box {
  max-width: 720px;
  margin: 0 auto;
  background: linear-gradient(120deg, #1f7ef0 0%, #1461d6 100%);
  border-radius: 22px;
  padding: 34px 20px;
  text-align: center;
  box-shadow: 0 14px 34px rgba(20,97,214,.3);
}
.cta-text { color: #fff; font-size: 32px; font-weight: 800; line-height: 1.5; margin-bottom: 22px; }
.cta-box .btn-cta { margin: 0 auto; }

/* ===================== FOOTER ===================== */
.site-footer {
  background: #fbfbf9;
  padding: 24px 20px 30px;
  text-align: center;
  border-top: 1px solid #ececec;
}
.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 18px;
  font-size: 16px;
  color: #2f6fe0;
  text-decoration: underline;
  margin-bottom: 22px;
}
.footer-logo { height: 28px; width: auto; margin: 0 auto 10px; }
.footer-provider { font-size: 16px; color: #4a5568; margin-bottom: 14px; }
.footer-copyright { font-size: 14px; color: #8a94a3; }

/* ===================== REGISTER PAGE ===================== */
.register-page { padding: 100px 20px 64px; }
/* 固定ヘッダーを置かないページ: ヘッダー分の上余白を通常の余白に戻す */
.register-page.register-page--no-header { padding-top: 40px; }
.register-page-inner {
  max-width: 640px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.register-page-title { font-size: 25.5px; font-weight: 800; color: var(--blue-900); text-align: center; }
.register-page-lead { font-size: 14.5px; color: #46536a; text-align: center; margin-top: -8px; }

/* ===================== TERMS / LEGAL CONTENT ===================== */
.terms-content { font-size: 13.5px; line-height: 1.9; color: #333844; }
.terms-content p { margin: 0 0 10px; }
.terms-heading {
  font-size: 15px;
  font-weight: 800;
  color: var(--blue-700);
  margin: 28px 0 10px;
  padding-top: 16px;
  border-top: 1px solid #ececec;
}
.terms-heading:first-of-type { border-top: none; padding-top: 0; margin-top: 0; }
.terms-table-wrap { overflow-x: auto; margin: 12px 0 16px; }
.terms-table { width: 100%; border-collapse: collapse; font-size: 12.5px; }
.terms-table td { border: 1px solid #e0e0e0; padding: 8px 10px; vertical-align: top; }
.terms-table td:first-child { background: #f7f9fc; font-weight: 700; white-space: nowrap; }
.terms-subheading { font-size: 13.5px; font-weight: 800; color: var(--ink); margin: 18px 0 8px; }

/* ===================== ATFIRST (はじめにお読みください) ===================== */
.atfirst-figure { margin: 4px 0 8px; }
.atfirst-figure img { width: 100%; height: auto; border: 1px solid #e3e9f5; border-radius: 10px; }
/* ①②… の丸数字で始まる手順: 折り返した行を本文の頭に揃える */
.terms-content .atfirst-step { padding-left: 1.5em; text-indent: -1.5em; }

/* ===================== FAQ PAGE ===================== */
.faq-category { font-size: 16px; font-weight: 800; color: var(--blue-700); margin: 28px 0 12px; }
.faq-category:first-of-type { margin-top: 0; }
.faq-item {
  background: #fff;
  border: 1px solid #e3e9f5;
  border-radius: 12px;
  padding: 0 16px;
  margin-bottom: 10px;
}
.faq-item summary {
  padding: 14px 26px 14px 0;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--ink);
  cursor: pointer;
  position: relative;
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "";
  position: absolute;
  right: 4px;
  top: 18px;
  width: 8px;
  height: 8px;
  border-right: 2px solid #9aa9c2;
  border-bottom: 2px solid #9aa9c2;
  transform: rotate(45deg);
  transition: transform .15s ease;
}
.faq-item[open] summary::after { transform: rotate(-135deg); top: 22px; }
.faq-item p { font-size: 12.5px; color: #46536a; line-height: 1.8; margin: 0 0 10px; }
.faq-item p:last-child { margin-bottom: 16px; }

/* ===================== Responsive: small phone (<480px) ===================== */
/* hero見出しを画面幅に比例して縮め、各行の途中で改行されないようにする */
@media (max-width: 479px) {
  .hero-text { --hero-fs: min(33.5px, 7.2vw); }
  .hero-title, .hero-title2, .hero-title-suffix { font-size: var(--hero-fs); }
  .hero-title, .hero-title2 { white-space: nowrap; }
  .hero-brand-logo { width: calc(var(--hero-fs) * 3.1); }
}

/* ===================== Responsive: tablet (≥720px) ===================== */
@media (min-width: 480px) {
  .compare-list li, .step-3-desc, .howto-step-body p { font-size: 18.5px; }
}

@media (min-width: 720px) {
  .story-body { max-width: 900px; }

  .story-hero-inner { flex-direction: row; align-items: center; }
  .story-hero-text { flex: 1.1; }
  .story-hero-photo-col { flex: 1; min-height: 260px; }

  .compare-body { display: grid; grid-template-columns: auto 1fr auto 1fr; gap: 24px; align-items: center; }
  .compare-person { height: 160px; margin-bottom: 0; width: 160px; }
  .compare-divider { width: 1px; height: 100%; margin: 0; }

  .steps-3 { flex-direction: row; align-items: stretch; }
  .step-3-card { flex: 1; }
  .step-arrow { display: flex; align-items: center; justify-content: center; font-size: 32px; color: var(--blue-500); font-weight: 800; }

  .origin-row { flex-direction: row; align-items: center; gap: 32px; }
  .origin-lead { flex: 1; }
  .origin-formula { flex: 1.3; flex-direction: row; justify-content: center; }

  .story-cta-top { flex-direction: row; justify-content: center; gap: 20px; }

  .howto-intro-card { flex-direction: row; align-items: center; }
  .howto-intro-media { flex: none; width: 160px; }

  .hero-title, .hero-title2, .hero-title-suffix { font-size: 36px; }
  .hero-brand-logo { width: 120px; top: 8px; }
  .hero-bubble { font-size: 17.5px; padding: 7px 16px; }
  .hero-phone { max-width: 200px; }
}

/* ===================== Responsive: desktop (≥1024px) ===================== */
@media (min-width: 1024px) {
  .site-header { padding: 24px 40px 36px; }
  .site-logo { display: block; }
  .header-inner { gap: 24px; }
  .nav-buttons { flex: none; gap: 12px; }
  .nav-btn { flex: none; padding: 11px 20px; font-size: 18px; }
  .nav-btn:hover { background: var(--blue-700); color: #fff; }

  .register-page { padding-top: 130px; }

  .hero { padding: 108px 40px 72px; }
  .hero-inner { margin-top: 36px; }
  .hero-top { gap: 56px; }
  .hero-text { flex: 1; }
  .hero-phone { flex: 0 0 340px; max-width: 340px; }
  .hero-title, .hero-title2, .hero-title-suffix { font-size: 58.5px; }
  .hero-brand-logo { width: 190px; }
  .hero-bubble { font-size: 20px; padding: 8px 18px; }
  .hero-people { margin-top: 40px; }
  .hero-cards { grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 48px; }
  .hero-card { padding: 26px 16px 22px; }
  .hero-card:hover { transform: translateY(-4px); box-shadow: 0 12px 26px rgba(11,63,158,.24); }
  .hero-card-icon { width: 72px; height: 72px; margin-bottom: 14px; }
  .hero-card-title { font-size: 20px; }
  .hero-card-desc { font-size: 16.5px; }

  .ambassador { padding: 72px 40px; }
  .amb-title { font-size: 34.5px; margin-bottom: 32px; }
  .amb-columns { display: grid; grid-template-columns: 360px 1fr; gap: 56px; align-items: start; }
  .amb-lead { font-size: 22.5px; margin-top: 0; }
  .amb-quote { font-size: 20.5px; }

  .story-hero { padding: 64px 40px 72px; }
  .story-hero-title { font-size: 48px; }
  .story-hero-desc { font-size: 20px; }
  .story-hero-photo-col { min-height: 320px; }

  .compare-card, .future-block, .origin-block { padding: 32px 36px; }
  .future-title, .amb-title { font-size: 29.5px; }
  .story-cta { padding: 40px; }

  .features { padding: 72px 40px; }
  .features-inner { max-width: var(--container); }
  .features-title { font-size: 42.5px; }
  .features-sub { font-size: 20px; margin-bottom: 36px; }
  .features-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .feature-item { padding: 26px; }

  .howto-inner { max-width: var(--container); }
  .howto { padding: 72px 40px 80px; }
  .howto-title { font-size: 45.5px; }
  .howto-sub { font-size: 25.5px; }
  .howto-intro-card { padding: 36px 40px; }
  .howto-steps { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px 24px; }
  .howto-step:hover { box-shadow: 0 10px 24px rgba(11,63,158,.16); }

  .faq { padding: 72px 40px; }
  .faq-title { font-size: 32px; }
  .faq-actions { flex-direction: row; justify-content: center; gap: 16px; }
  .faq-btn { width: auto; }

  .cta-banner { padding: 56px 40px; }
  .cta-box { max-width: var(--container); padding: 48px 40px; }
  .cta-text { font-size: 40px; }

  .site-footer { padding: 40px 40px 36px; }
}

@media (min-width: 1280px) {
  :root { --container: 1240px; }
  .site-header, .hero { padding-left: 64px; padding-right: 64px; }
  .ambassador, .howto, .features { padding-left: 64px; padding-right: 64px; }
  .story-hero, .cta-banner, .site-footer { padding-left: 64px; padding-right: 64px; }
}