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

:root {
  /* Brand Colors */
  --color-primary: #2E6AB1;
  --color-primary-dark: #1E4D8A;
  --color-primary-light: #4A8AD4;
  --color-accent: #E8B830;
  --color-accent-dark: #C99A20;
  --color-gray-dark: #333333;
  --color-gray: #666666;
  --color-gray-light: #999999;
  --color-gray-bg: #F5F7FA;
  --color-white: #FFFFFF;
  --color-border: #E0E4EA;

  /* Typography */
  --font-ja: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'メイリオ', sans-serif;
  --font-en: 'Montserrat', sans-serif;

  /* Spacing */
  --section-padding: 100px 0;
  --container-width: 1100px;

  /* Transition */
  --transition: 0.3s ease;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-ja);
  color: var(--color-gray-dark);
  line-height: 1.8;
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary-dark);
}

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

ul {
  list-style: none;
}

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

.sp-only {
  display: none;
}

/* ============================
   HEADER
   ============================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}

.header--scrolled {
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

.header__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.header__company-name {
  font-family: var(--font-en);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.1em;
}

.header__hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 32px;
  height: 24px;
  position: relative;
  z-index: 1001;
}

.header__hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-gray-dark);
  position: absolute;
  left: 0;
  transition: var(--transition);
}

.header__hamburger span:nth-child(1) { top: 0; }
.header__hamburger span:nth-child(2) { top: 50%; transform: translateY(-50%); }
.header__hamburger span:nth-child(3) { bottom: 0; }

.header__hamburger.active span:nth-child(1) {
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
}

.header__hamburger.active span:nth-child(2) {
  opacity: 0;
}

.header__hamburger.active span:nth-child(3) {
  bottom: 50%;
  transform: translateY(50%) rotate(-45deg);
}

.header__nav-list {
  display: flex;
  align-items: center;
  gap: 28px;
}

.header__nav-link {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-gray-dark);
  letter-spacing: 0.02em;
  transition: color var(--transition);
  position: relative;
}

.header__nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition);
}

.header__nav-link:hover {
  color: var(--color-primary);
}

.header__nav-link:hover::after {
  width: 100%;
}

.header__nav-link--cta {
  background: var(--color-primary);
  color: var(--color-white) !important;
  padding: 8px 20px;
  border-radius: 4px;
  font-weight: 600;
}

.header__nav-link--cta::after {
  display: none;
}

.header__nav-link--cta:hover {
  background: var(--color-primary-dark);
  color: var(--color-white) !important;
}

/* ============================
   HERO
   ============================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1a3a6b 0%, #2E6AB1 40%, #4A8AD4 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(232, 184, 48, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(255, 255, 255, 0.05) 0%, transparent 40%);
}

.hero__overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100"><defs><pattern id="p" width="20" height="20" patternUnits="userSpaceOnUse"><circle cx="1" cy="1" r="0.5" fill="rgba(255,255,255,0.05)"/></pattern></defs><rect width="100" height="100" fill="url(%23p)"/></svg>');
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: var(--color-white);
  padding: 100px 24px 40px;
}

.hero__logo-wrap {
  margin-bottom: 36px;
}

.hero__logo-wrap {
  margin-bottom: 36px;
}

.hero__logo-img {
  height: 320px;
  width: auto;
  margin: 0 auto;
}

.hero__sub {
  font-family: var(--font-en);
  font-size: 0.95rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  margin-bottom: 24px;
  opacity: 0.85;
}

.hero__title {
  font-size: 2.8rem;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 24px;
  letter-spacing: 0.05em;
}

.hero__desc {
  font-size: 1rem;
  line-height: 2;
  opacity: 0.9;
  margin-bottom: 40px;
}

.hero__cta {
  display: inline-block;
  background: var(--color-accent);
  color: var(--color-gray-dark);
  font-weight: 700;
  font-size: 1rem;
  padding: 16px 48px;
  border-radius: 4px;
  letter-spacing: 0.05em;
  transition: all var(--transition);
  box-shadow: 0 4px 16px rgba(232, 184, 48, 0.3);
}

.hero__cta:hover {
  background: var(--color-accent-dark);
  color: var(--color-gray-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(232, 184, 48, 0.4);
}

/* ============================
   SECTIONS COMMON
   ============================ */
.section {
  padding: var(--section-padding);
}

.section__title {
  font-family: var(--font-en);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
  text-align: center;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

.section__subtitle {
  text-align: center;
  font-size: 0.9rem;
  color: var(--color-gray-light);
  margin-bottom: 56px;
  letter-spacing: 0.05em;
}

/* ============================
   ABOUT
   ============================ */
.about {
  background: var(--color-white);
}

.about__table-wrap {
  max-width: 800px;
  margin: 0 auto 48px;
}

.about__table {
  width: 100%;
  border-collapse: collapse;
}

.about__table tr {
  border-bottom: 1px solid var(--color-border);
}

.about__table th {
  width: 180px;
  padding: 20px 24px;
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--color-primary);
  text-align: left;
  vertical-align: top;
  background: var(--color-gray-bg);
}

.about__table td {
  padding: 20px 24px;
  font-size: 0.9rem;
  line-height: 1.8;
}

.about__table td a {
  color: var(--color-primary);
}

.about__table td a:hover {
  text-decoration: underline;
}

.about__origin {
  max-width: 800px;
  margin: 0 auto;
  background: var(--color-gray-bg);
  border-radius: 8px;
  padding: 40px;
  border-left: 4px solid var(--color-primary);
}

.about__origin-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.about__origin-text {
  font-size: 0.95rem;
  line-height: 2;
  color: var(--color-gray);
}

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

.service__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.service__card {
  background: var(--color-white);
  border-radius: 8px;
  padding: 48px 32px;
  text-align: center;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.04);
  transition: all var(--transition);
  border: 1px solid var(--color-border);
}

.service__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

.service__icon {
  color: var(--color-primary);
  margin-bottom: 24px;
}

.service__icon svg {
  margin: 0 auto;
}

.service__card-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--color-gray-dark);
  line-height: 1.6;
}

.service__card-desc {
  font-size: 0.9rem;
  color: var(--color-gray);
  line-height: 1.9;
}

/* ============================
   MVV
   ============================ */
.mvv {
  background: var(--color-white);
}

.mvv__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.mvv__card {
  background: var(--color-white);
  border-radius: 8px;
  padding: 40px 32px;
  text-align: center;
  border: 2px solid var(--color-border);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.mvv__card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
}

.mvv__card:hover {
  border-color: var(--color-primary-light);
  box-shadow: 0 8px 32px rgba(46, 106, 177, 0.1);
}

.mvv__label {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--color-primary);
  background: rgba(46, 106, 177, 0.08);
  padding: 4px 16px;
  border-radius: 20px;
  margin-bottom: 16px;
}

.mvv__card-title {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-gray-light);
  margin-bottom: 16px;
}

.mvv__card-text {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-gray-dark);
  line-height: 1.7;
  margin-bottom: 16px;
}

.mvv__card-desc {
  font-size: 0.85rem;
  color: var(--color-gray);
  line-height: 1.9;
}

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

.message__content {
  display: flex;
  gap: 56px;
  align-items: flex-start;
  max-width: 900px;
  margin: 0 auto;
}

.message__img-wrap {
  flex-shrink: 0;
  width: 280px;
}

.message__img {
  width: 100%;
  border-radius: 8px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.1);
}

.message__text-wrap {
  flex: 1;
}

.message__name {
  font-size: 0.9rem;
  color: var(--color-gray-light);
  margin-bottom: 24px;
}

.message__name span {
  display: block;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-gray-dark);
  margin-top: 4px;
}

.message__text {
  font-size: 0.95rem;
  line-height: 2;
  color: var(--color-gray);
  margin-bottom: 16px;
}

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

/* ============================
   RESULTS
   ============================ */
.results {
  background: var(--color-white);
}

.results__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 24px;
}

.results__card {
  background: var(--color-gray-bg);
  border-radius: 8px;
  padding: 36px 28px;
  transition: all var(--transition);
}

.results__card:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.results__card-header {
  margin-bottom: 16px;
}

.results__card-category {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-primary);
  background: rgba(46, 106, 177, 0.1);
  padding: 4px 12px;
  border-radius: 4px;
}

.results__card-text {
  font-size: 0.9rem;
  line-height: 1.9;
  color: var(--color-gray);
  margin-bottom: 16px;
}

.results__card-author {
  font-size: 0.8rem;
  color: var(--color-gray-light);
  text-align: right;
}

.results__note {
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-gray-light);
}

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

.news__list {
  max-width: 800px;
  margin: 0 auto;
}

.news__item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition);
}

.news__item:first-child {
  border-top: 1px solid var(--color-border);
}

.news__date {
  font-family: var(--font-en);
  font-size: 0.85rem;
  color: var(--color-gray-light);
  flex-shrink: 0;
  letter-spacing: 0.03em;
}

.news__tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-white);
  background: var(--color-primary);
  padding: 2px 12px;
  border-radius: 3px;
  flex-shrink: 0;
}

.news__text {
  font-size: 0.9rem;
  color: var(--color-gray);
}

/* ============================
   CONTACT
   ============================ */
.contact {
  background: var(--color-white);
}

.contact__status {
  display: none;
  max-width: 640px;
  margin: 0 auto 32px;
  padding: 20px 24px;
  border-radius: 8px;
  text-align: center;
  font-size: 0.95rem;
  line-height: 1.8;
}

.contact__status--success {
  background: #E8F5E9;
  color: #2E7D32;
  border: 1px solid #A5D6A7;
}

.contact__status--error {
  background: #FBE9E7;
  color: #C62828;
  border: 1px solid #EF9A9A;
}

.contact__lead {
  text-align: center;
  font-size: 0.95rem;
  color: var(--color-gray);
  margin-bottom: 48px;
  line-height: 2;
}

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

.contact__form-group {
  margin-bottom: 28px;
}

.contact__label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--color-gray-dark);
}

.contact__label .required {
  display: inline-block;
  font-size: 0.7rem;
  color: var(--color-white);
  background: #E74C3C;
  padding: 1px 8px;
  border-radius: 3px;
  margin-left: 8px;
  vertical-align: middle;
}

.contact__input,
.contact__select,
.contact__textarea {
  width: 100%;
  padding: 12px 16px;
  font-size: 0.95rem;
  font-family: var(--font-ja);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: var(--color-white);
  color: var(--color-gray-dark);
  transition: border-color var(--transition);
  appearance: none;
  -webkit-appearance: none;
}

.contact__select {
  background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="12" height="8"><path d="M1 1l5 5 5-5" stroke="%23999" stroke-width="1.5" fill="none"/></svg>');
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

.contact__input:focus,
.contact__select:focus,
.contact__textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(46, 106, 177, 0.1);
}

.contact__textarea {
  resize: vertical;
  min-height: 140px;
}

.contact__form-submit {
  text-align: center;
  margin-top: 36px;
}

.contact__btn {
  display: inline-block;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font-ja);
  padding: 16px 64px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  letter-spacing: 0.05em;
  transition: all var(--transition);
}

.contact__btn:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(46, 106, 177, 0.3);
}

/* ============================
   FOOTER
   ============================ */
.footer {
  background: var(--color-gray-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 60px 0 32px;
}

.footer__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  text-align: center;
}

.footer__logo-wrap {
  margin-bottom: 24px;
}

.footer__logo-img {
  height: 96px;
  margin: 0 auto;
  filter: brightness(0) invert(1);
  opacity: 0.7;
}

.footer__info {
  margin-bottom: 24px;
}

.footer__info p {
  font-size: 0.85rem;
  line-height: 1.8;
}

.footer__info a {
  color: rgba(255, 255, 255, 0.7);
}

.footer__info a:hover {
  color: var(--color-white);
}

.footer__nav {
  margin-bottom: 32px;
}

.footer__nav ul {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 24px;
}

.footer__nav a {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--transition);
}

.footer__nav a:hover {
  color: var(--color-white);
}

.footer__copy {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.4);
  letter-spacing: 0.03em;
}

/* ============================
   ANIMATIONS (scroll-reveal)
   ============================ */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================
   RESPONSIVE
   ============================ */
@media (max-width: 768px) {
  :root {
    --section-padding: 64px 0;
  }

  .sp-only {
    display: inline;
  }

  /* Header */
  .header__hamburger {
    display: block;
  }

  .header__nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 75%;
    max-width: 320px;
    height: 100vh;
    background: var(--color-white);
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
    transition: right var(--transition);
    padding-top: 80px;
    z-index: 1000;
  }

  .header__nav.open {
    right: 0;
  }

  .header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 0 32px;
  }

  .header__nav-link {
    display: block;
    padding: 16px 0;
    font-size: 0.95rem;
    border-bottom: 1px solid var(--color-border);
    width: 100%;
  }

  .header__nav-link::after {
    display: none;
  }

  .header__nav-link--cta {
    margin-top: 16px;
    text-align: center;
    border-bottom: none;
    border-radius: 4px;
    display: inline-block;
    width: auto;
    padding: 12px 32px;
  }

  /* Hero */
  .hero__logo-img {
    height: 150px;
  }

  .hero__title {
    font-size: 1.8rem;
  }

  .hero__sub {
    font-size: 0.8rem;
  }

  .hero__desc {
    font-size: 0.9rem;
  }

  .hero__cta {
    padding: 14px 36px;
    font-size: 0.95rem;
  }

  /* Sections */
  .section__title {
    font-size: 2rem;
  }

  .section__subtitle {
    margin-bottom: 40px;
  }

  /* About */
  .about__table th {
    display: block;
    width: 100%;
    padding: 12px 16px 4px;
    border-bottom: none;
  }

  .about__table td {
    display: block;
    padding: 4px 16px 12px;
  }

  .about__origin {
    padding: 24px;
  }

  /* Service */
  .service__grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .service__card {
    padding: 36px 24px;
  }

  /* MVV */
  .mvv__grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  /* Message */
  .message__content {
    flex-direction: column;
    align-items: center;
    gap: 32px;
  }

  .message__img-wrap {
    width: 200px;
  }

  /* Results */
  .results__grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  /* News */
  .news__item {
    flex-wrap: wrap;
    gap: 8px;
  }

  .news__text {
    width: 100%;
  }

  /* Contact */
  .contact__lead br {
    display: none;
  }

  .contact__btn {
    width: 100%;
    padding: 16px 24px;
  }

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

@media (max-width: 480px) {
  .hero__title {
    font-size: 1.5rem;
  }
}