/* =====================
   CSS Variables
===================== */
:root {
  --color-primary: #2A7B8C;      /* シーガルブルー */
  --color-primary-dark: #1f5f6e;
  --color-primary-light: #e8f4f7;
  --color-accent: #4EAFC0;
  --color-line: #06C755;
  --color-text: #2c2c2c;
  --color-text-sub: #6b6b6b;
  --color-bg: #ffffff;
  --color-bg-gray: #f7f8f9;
  --color-border: #e0e0e0;
  --font-base: 'Noto Sans JP', sans-serif;
  --max-width: 1080px;
  --radius: 12px;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --transition: 0.3s ease;
}

/* =====================
   Reset & Base
===================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 72px;
}

body {
  font-family: var(--font-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
  font-size: 16px;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

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

.sp-only {
  display: none;
}

.placeholder-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  background: var(--color-primary-light);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: 14px;
}

.placeholder-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: 12px;
  flex-shrink: 0;
}

/* =====================
   Section共通
===================== */
section {
  padding: 80px 0;
}

.section__label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--color-primary);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.section__title {
  font-size: clamp(22px, 4vw, 32px);
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 48px;
}

/* =====================
   Buttons
===================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 100px;
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}
.btn--primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(42, 123, 140, 0.3);
}

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn--outline:hover {
  background: var(--color-primary-light);
}

.btn--line {
  background: var(--color-line);
  color: white;
  border-color: var(--color-line);
}
.btn--line:hover {
  background: #05a847;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(6, 199, 85, 0.3);
}

.btn--header {
  background: var(--color-primary);
  color: white;
  padding: 10px 20px;
  font-size: 14px;
}

.btn--lg {
  padding: 18px 40px;
  font-size: 16px;
}

.btn--full {
  width: 100%;
}

.btn__icon {
  font-size: 18px;
}

/* =====================
   Header
===================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}

.header.scrolled {
  box-shadow: var(--shadow);
}

.header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.header__logo {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  flex-shrink: 0;
}

.header__logo-en {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.05em;
}

.header__logo-ja {
  font-size: 10px;
  color: var(--color-text-sub);
}

.header__nav {
  flex: 1;
}

.header__nav-list {
  display: flex;
  gap: 28px;
  justify-content: flex-end;
}

.header__nav-list a {
  font-size: 14px;
  color: var(--color-text);
  transition: color var(--transition);
}
.header__nav-list a:hover {
  color: var(--color-primary);
}

.header__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.header__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: all var(--transition);
}

/* =====================
   Ken Burns キーフレーム
===================== */
@keyframes kenBurns {
  0%   { transform: scale(1)    translate(0, 0); }
  100% { transform: scale(1.15) translate(-2%, -1%); }
}
@keyframes kenBurns2 {
  0%   { transform: scale(1)    translate(0, 0); }
  100% { transform: scale(1.15) translate(2%, -1%); }
}
@keyframes kenBurns3 {
  0%   { transform: scale(1.1)  translate(1%, 1%); }
  100% { transform: scale(1)    translate(-1%, 0); }
}
@keyframes kenBurns4 {
  0%   { transform: scale(1)    translate(-1%, 0); }
  100% { transform: scale(1.12) translate(1%, -1%); }
}

/* =====================
   Hero
===================== */
.hero {
  min-height: 100svh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

/* スライダーコンテナ */
.hero__slider {
  position: absolute;
  inset: 0;
  z-index: 0;
}

/* 各スライド */
.hero__slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1.2s ease;
}

.hero__slide.active {
  opacity: 1;
}

.hero__slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  will-change: transform;
}

/* Ken Burns アニメーション（スライドごとに方向を変える） */
.hero__slide:nth-child(1).active img { animation: kenBurns  6s ease forwards; }
.hero__slide:nth-child(2).active img { animation: kenBurns2 6s ease forwards; }
.hero__slide:nth-child(3).active img { animation: kenBurns3 6s ease forwards; }
.hero__slide:nth-child(4).active img { animation: kenBurns4 6s ease forwards; }

/* 暗幕オーバーレイ */
.hero__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  z-index: 1;
}

/* テキストコンテンツ */
.hero__inner {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 120px 24px 80px;
}

.hero__label {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 16px;
  text-transform: uppercase;
}

.hero__title {
  font-size: clamp(32px, 6vw, 58px);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 24px;
  letter-spacing: -0.01em;
  color: white;
}

.hero__sub {
  font-size: clamp(15px, 2vw, 18px);
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 40px;
  line-height: 1.9;
}

.hero__cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* アウトラインボタン（白文字版） */
.btn--outline-white {
  background: transparent;
  color: white;
  border-color: rgba(255, 255, 255, 0.7);
}
.btn--outline-white:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: white;
}

/* スライドインジケーター（ドット） */
.hero__dots {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  gap: 10px;
}

.hero__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.45);
  border: none;
  cursor: pointer;
  padding: 0;
  transition: all 0.3s ease;
}

.hero__dot.active {
  background: white;
  width: 24px;
  border-radius: 4px;
}

/* =====================
   Numbers
===================== */
.numbers {
  background: var(--color-primary);
  color: white;
  padding: 64px 0;
}

.numbers .section__label {
  color: rgba(255,255,255,0.7);
}

.numbers .section__title {
  color: white;
}

.numbers__list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.numbers__item {
  text-align: center;
  padding: 32px 16px;
  background: rgba(255,255,255,0.1);
  border-radius: var(--radius);
}

.numbers__num {
  display: block;
  font-size: clamp(40px, 5vw, 60px);
  font-weight: 700;
  line-height: 1;
}

.numbers__unit {
  font-size: 18px;
  font-weight: 700;
}

.numbers__desc {
  display: block;
  font-size: 13px;
  margin-top: 8px;
  opacity: 0.85;
}

/* =====================
   Reason
===================== */
.reason {
  background: var(--color-bg-gray);
}

.reason__list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.reason__item {
  background: white;
  border-radius: var(--radius);
  padding: 40px 32px;
  position: relative;
  box-shadow: var(--shadow);
  transition: transform var(--transition);
}

.reason__item:hover {
  transform: translateY(-4px);
}

.reason__num {
  position: absolute;
  top: 20px;
  right: 24px;
  font-size: 48px;
  font-weight: 700;
  color: var(--color-primary-light);
  line-height: 1;
}

.reason__icon {
  font-size: 36px;
  margin-bottom: 16px;
}

.reason__title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-primary);
}

.reason__text {
  font-size: 14px;
  color: var(--color-text-sub);
  line-height: 1.9;
}

/* =====================
   About
===================== */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about__text {
  font-size: 15px;
  line-height: 2;
  margin-bottom: 20px;
  color: var(--color-text-sub);
}

.about__text:last-of-type {
  margin-bottom: 32px;
}

/* =====================
   Voice
===================== */
.voice {
  background: var(--color-bg-gray);
}

.voice__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.voice__card {
  background: white;
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
}

.voice__profile {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.voice__name {
  display: block;
  font-weight: 700;
  font-size: 16px;
}

.voice__role {
  display: block;
  font-size: 12px;
  color: var(--color-text-sub);
  margin-top: 2px;
}

.voice__before {
  font-size: 14px;
  color: var(--color-text-sub);
  background: var(--color-bg-gray);
  border-radius: 8px;
  padding: 12px 16px;
  margin-bottom: 16px;
}

.voice__before-label {
  display: block;
  font-size: 11px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.voice__after {
  font-size: 15px;
  line-height: 1.8;
  font-weight: 500;
  border-left: 3px solid var(--color-primary);
  padding-left: 12px;
}

/* =====================
   Timeline
===================== */
.timeline__list {
  max-width: 640px;
  margin: 0 auto;
  position: relative;
}

.timeline__list::before {
  content: '';
  position: absolute;
  left: 70px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-primary-light);
}

.timeline__item {
  display: flex;
  gap: 32px;
  align-items: flex-start;
  margin-bottom: 40px;
  position: relative;
}

.timeline__item:last-child {
  margin-bottom: 0;
}

.timeline__time {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-primary);
  width: 54px;
  flex-shrink: 0;
  padding-top: 2px;
}

.timeline__content {
  flex: 1;
  background: white;
  border-radius: var(--radius);
  padding: 20px 24px;
  box-shadow: var(--shadow);
  position: relative;
}

.timeline__content::before {
  content: '';
  position: absolute;
  left: -8px;
  top: 14px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid white;
  box-shadow: 0 0 0 2px var(--color-primary);
}

.timeline__title {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 6px;
}

.timeline__text {
  font-size: 13px;
  color: var(--color-text-sub);
}

/* =====================
   Recruit
===================== */
.recruit {
  background: var(--color-bg-gray);
}

.recruit__table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 40px;
  background: white;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.recruit__table th,
.recruit__table td {
  padding: 20px 24px;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  font-size: 15px;
}

.recruit__table th {
  width: 160px;
  background: var(--color-primary-light);
  font-weight: 700;
  color: var(--color-primary);
  vertical-align: top;
}

.recruit__table tr:last-child th,
.recruit__table tr:last-child td {
  border-bottom: none;
}

.recruit__table small {
  color: var(--color-text-sub);
  font-size: 12px;
}

.recruit__cta {
  text-align: center;
}

/* =====================
   Company
===================== */
.company__table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.company__table th,
.company__table td {
  padding: 18px 24px;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  font-size: 15px;
}

.company__table th {
  width: 160px;
  background: var(--color-bg-gray);
  font-weight: 700;
  color: var(--color-text-sub);
  vertical-align: top;
}

.company__table tr:last-child th,
.company__table tr:last-child td {
  border-bottom: none;
}

/* =====================
   Visit (CTA)
===================== */
.visit {
  background: linear-gradient(135deg, #e8f4f7 0%, #d4edf5 100%);
  text-align: center;
}

.visit__title {
  font-size: clamp(28px, 5vw, 44px);
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.3;
}

.visit__text {
  font-size: 16px;
  color: var(--color-text-sub);
  margin-bottom: 40px;
  line-height: 2;
}

.visit__cta {
  margin-bottom: 16px;
}

.visit__note {
  font-size: 13px;
  color: var(--color-text-sub);
  margin-bottom: 64px;
}

.visit__form {
  max-width: 560px;
  margin: 0 auto;
  text-align: left;
  background: white;
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow);
}

.visit__form-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 24px;
  text-align: center;
  color: var(--color-primary);
}

/* =====================
   Form
===================== */
.form__group {
  margin-bottom: 20px;
}

.form__label {
  display: block;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 6px;
}

.form__required {
  background: var(--color-primary);
  color: white;
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: 6px;
}

.form__input,
.form__select,
.form__textarea {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--color-border);
  border-radius: 8px;
  font-family: var(--font-base);
  font-size: 15px;
  color: var(--color-text);
  transition: border-color var(--transition);
  appearance: none;
  background: white;
}

.form__input:focus,
.form__select:focus,
.form__textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

.form__textarea {
  resize: vertical;
}

/* =====================
   FAQ
===================== */
.faq {
  background: var(--color-bg-gray);
}

.faq__list {
  max-width: 720px;
  margin: 0 auto;
}

.faq__item {
  background: white;
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.faq__question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-base);
  font-size: 15px;
  font-weight: 700;
  text-align: left;
  gap: 16px;
  color: var(--color-text);
  transition: background var(--transition);
}

.faq__question:hover {
  background: var(--color-primary-light);
}

.faq__icon {
  font-size: 20px;
  color: var(--color-primary);
  flex-shrink: 0;
  transition: transform var(--transition);
}

.faq__question[aria-expanded="true"] .faq__icon {
  transform: rotate(45deg);
}

.faq__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
}

.faq__answer p {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--color-text-sub);
  line-height: 1.9;
}

.faq__item.open .faq__answer {
  max-height: 300px;
}

/* =====================
   Footer
===================== */
.footer {
  background: var(--color-text);
  color: white;
  padding: 48px 0 24px;
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.footer__logo-en {
  display: block;
  font-size: 20px;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.05em;
}

.footer__logo-ja {
  display: block;
  font-size: 11px;
  color: rgba(255,255,255,0.6);
  margin-top: 4px;
}

.footer__nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 24px;
}

.footer__nav a {
  font-size: 13px;
  color: rgba(255,255,255,0.7);
  transition: color var(--transition);
}

.footer__nav a:hover {
  color: white;
}

.footer__copy {
  font-size: 12px;
  color: rgba(255,255,255,0.4);
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.1);
}

/* =====================
   Fixed CTA（スマホのみ表示）
===================== */
.fixed-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 12px 16px;
  background: white;
  border-top: 1px solid var(--color-border);
  z-index: 99;
  box-shadow: 0 -4px 16px rgba(0,0,0,0.08);
}

.fixed-cta .btn {
  width: 100%;
}

/* =====================
   Scroll Animation
===================== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: none;
}

/* =====================
   Responsive
===================== */
@media (max-width: 900px) {
  .numbers__list {
    grid-template-columns: repeat(2, 1fr);
  }

  .reason__list {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }

  .about__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .voice__grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  section {
    padding: 60px 0;
  }

  .sp-only {
    display: inline;
  }

  .header__nav,
  .btn--header {
    display: none;
  }

  .header__hamburger {
    display: flex;
    margin-left: auto;
  }

  /* モバイルナビ展開時 */
  .header__nav.open {
    display: block;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: white;
    padding: 24px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow);
  }

  .header__nav.open .header__nav-list {
    flex-direction: column;
    gap: 16px;
  }

  .hero {
    min-height: auto;
    padding: 120px 0 80px;
  }

  .hero__cta {
    flex-direction: column;
  }

  .hero__cta .btn {
    width: 100%;
    justify-content: center;
  }

  .numbers__list {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .recruit__table,
  .company__table {
    display: block;
    overflow-x: auto;
  }

  .recruit__table th,
  .company__table th {
    width: 100px;
  }

  .visit__form {
    padding: 24px;
  }

  .timeline__list::before {
    left: 60px;
  }

  .fixed-cta {
    display: block;
  }

  .footer__inner {
    flex-direction: column;
  }

  .footer__nav ul {
    flex-direction: column;
    gap: 12px;
  }
}

@media (max-width: 480px) {
  .numbers__list {
    grid-template-columns: repeat(2, 1fr);
  }

  .numbers__num {
    font-size: 36px;
  }
}