/* ========================================
   ビズフライト LP スタイルシート
   ★ カラーを変更する場合は :root の変数を編集
   ======================================== */

:root {
  --color-navy:      #1B3A5C;
  --color-navy-dark: #152D47;
  --color-sky:       #2E86C1;
  --color-white:     #FFFFFF;
  --color-gray-bg:   #F5F7FA;
  --color-text:      #2D3748;
  --color-text-sub:  #718096;
  --color-green:     #38A169;
  --color-border:    #E2E8F0;

  --font-base: 'Noto Sans JP', 'Inter', sans-serif;
  --radius: 8px;
  --shadow: 0 2px 12px rgba(0,0,0,0.08);
  --transition: 0.2s ease;
  --container: 1100px;
}

/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-base);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background: var(--color-white);
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ===== CONTAINER ===== */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== SECTION ===== */
.section { padding: 80px 0; }
.section--gray { background: var(--color-gray-bg); }

.section-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-navy);
  text-align: center;
  margin-bottom: 48px;
  position: relative;
  padding-bottom: 16px;
}
.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 48px;
  height: 3px;
  background: var(--color-sky);
  border-radius: 2px;
}
.section-title--white { color: var(--color-white); }
.section-title--white::after { background: rgba(255,255,255,0.6); }

/* ===== BUTTONS ===== */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  transition: background-color var(--transition), opacity var(--transition);
  border: none;
  text-align: center;
}
.btn--sm {
  padding: 8px 20px;
  font-size: 14px;
  background: var(--color-navy);
  color: var(--color-white);
  border-radius: var(--radius);
}
.btn--sm:hover { background: var(--color-navy-dark); }
.btn--hero {
  background: var(--color-white);
  color: var(--color-navy);
  font-size: 18px;
  padding: 16px 40px;
  box-shadow: var(--shadow);
}
.btn--hero:hover { opacity: 0.9; }
.btn--submit {
  width: 100%;
  background: var(--color-sky);
  color: var(--color-white);
  font-size: 18px;
  padding: 16px;
  margin-top: 8px;
}
.btn--submit:hover { background: #2573a7; }

/* ===== HEADER ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  height: 64px;
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.header__logo .service-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-navy);
  letter-spacing: 0.05em;
}
.header__nav {
  display: flex;
  align-items: center;
  gap: 32px;
}
.header__nav a:not(.btn) {
  font-size: 14px;
  color: var(--color-text);
  font-weight: 600;
  transition: color var(--transition);
}
.header__nav a:not(.btn):hover { color: var(--color-navy); }

/* ===== HERO ===== */
.hero {
  background: var(--color-navy);
  color: var(--color-white);
  padding: 140px 0 100px;
  text-align: center;
}
.hero__label {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.1em;
  opacity: 0.8;
  margin-bottom: 20px;
}
.hero__title {
  font-size: 44px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 24px;
}
.hero__accent {
  color: #7EC8E3;
  font-size: 52px;
}
.hero__sub {
  font-size: 16px;
  opacity: 0.85;
  margin-bottom: 40px;
  line-height: 2;
}

/* ===== PROBLEM ===== */
.problem { background: var(--color-white); }
.problem__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}
.problem__card {
  background: var(--color-gray-bg);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  border-left: 4px solid var(--color-sky);
}
.problem__icon { font-size: 36px; margin-bottom: 16px; }
.problem__card p { font-size: 15px; line-height: 1.7; }
.problem__arrow {
  text-align: center;
  font-size: 18px;
  font-weight: 700;
  color: var(--color-navy);
}

/* ===== SERVICE ===== */
.service__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service__card {
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow);
  border-top: 3px solid var(--color-sky);
}
.service__num {
  font-size: 12px;
  font-weight: 700;
  color: var(--color-sky);
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}
.service__card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 12px;
}
.service__card h3 strong { color: var(--color-sky); }
.service__card p { font-size: 14px; color: var(--color-text-sub); line-height: 1.7; }
.service__note {
  text-align: center;
  margin-top: 32px;
  font-size: 13px;
  color: var(--color-text-sub);
}

/* ===== FLOW ===== */
.flow__steps {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.flow__step {
  flex: 1;
  background: var(--color-gray-bg);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
}
.flow__step-num {
  font-size: 11px;
  font-weight: 700;
  color: var(--color-sky);
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}
.flow__step h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 8px;
}
.flow__step p { font-size: 13px; color: var(--color-text-sub); line-height: 1.6; }
.flow__arrow {
  color: var(--color-sky);
  font-size: 24px;
  font-weight: 700;
  padding-top: 40px;
  flex-shrink: 0;
}

/* ===== FAQ ===== */
.faq__list { max-width: 720px; margin: 0 auto; }
.faq__item {
  border-bottom: 1px solid var(--color-border);
  padding: 20px 0;
}
.faq__q {
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 8px;
  padding-left: 24px;
  position: relative;
}
.faq__q::before {
  content: 'Q';
  position: absolute;
  left: 0;
  color: var(--color-sky);
  font-weight: 700;
}
.faq__a {
  font-size: 15px;
  color: var(--color-text-sub);
  padding-left: 24px;
  position: relative;
}
.faq__a::before {
  content: 'A';
  position: absolute;
  left: 0;
  color: var(--color-green);
  font-weight: 700;
}

/* ===== COMPANY ===== */
.company__table {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  border-collapse: collapse;
}
.company__table th,
.company__table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-border);
  font-size: 15px;
  text-align: left;
}
.company__table th {
  width: 200px;
  color: var(--color-text-sub);
  font-weight: 600;
  white-space: nowrap;
}

/* ===== CONTACT ===== */
.contact {
  background: var(--color-navy);
  color: var(--color-white);
}
.contact__lead {
  text-align: center;
  opacity: 0.85;
  margin-bottom: 40px;
  line-height: 2;
}
.contact__form {
  max-width: 640px;
  margin: 0 auto;
  background: var(--color-white);
  border-radius: 12px;
  padding: 40px;
}
.form__row { margin-bottom: 20px; }
.form__row--half {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.form__label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}
.required {
  background: #E53E3E;
  color: white;
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 3px;
  margin-left: 6px;
  vertical-align: middle;
}
.form__input,
.form__textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 15px;
  font-family: var(--font-base);
  color: var(--color-text);
  transition: border-color var(--transition);
}
.form__input:focus,
.form__textarea:focus {
  outline: none;
  border-color: var(--color-sky);
}
.form__textarea { min-height: 100px; resize: vertical; }
.form__radio-group {
  display: flex;
  gap: 24px;
  padding: 10px 0;
}
.form__radio-group label { font-size: 15px; cursor: pointer; }
.form__radio-group input { margin-right: 6px; }
.form__note {
  font-size: 12px;
  color: var(--color-text-sub);
  margin-bottom: 16px;
}
.form__message {
  margin-top: 16px;
  text-align: center;
  font-size: 15px;
  font-weight: 600;
}
.form__message.success { color: var(--color-green); }
.form__message.error { color: #E53E3E; }

/* ===== FOOTER ===== */
.footer {
  background: var(--color-navy-dark);
  color: rgba(255,255,255,0.6);
  padding: 32px 0;
  text-align: center;
}
.footer__logo {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 8px;
}
.footer__copy { font-size: 13px; }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .hero__title { font-size: 32px; }
  .hero__accent { font-size: 38px; }
  .problem__grid { grid-template-columns: 1fr; }
  .service__grid { grid-template-columns: repeat(2, 1fr); }
  .flow__steps { flex-direction: column; }
  .flow__arrow { padding-top: 0; transform: rotate(90deg); align-self: center; }
  .header__nav a:not(.btn) { display: none; }
  .company__table th { width: 120px; }
  .form__row--half { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .section { padding: 56px 0; }
  .hero { padding: 100px 0 72px; }
  .hero__title { font-size: 26px; }
  .hero__accent { font-size: 30px; }
  .section-title { font-size: 22px; }
  .service__grid { grid-template-columns: 1fr; }
  .contact__form { padding: 24px 20px; }
}