/* ========================================
   CSS Custom Properties
   ======================================== */
:root {
  --color-red:       #BC002D;
  --color-red-dark:  #960024;
  --color-navy:      #1A2B4A;
  --color-navy-dark: #111e33;
  --color-white:     #FFFFFF;
  --color-gray:      #F5F5F5;
  --color-gray-mid:  #E0E0E0;
  --color-text:      #1A1A1A;
  --color-text-sub:  #555555;

  --font-main: 'Noto Sans JP', sans-serif;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.14);

  --transition: 0.25s ease;

  --container-max: 1100px;
  --container-pad: clamp(1rem, 5vw, 2rem);
}

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

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

body {
  font-family: var(--font-main);
  color: var(--color-text);
  background: var(--color-white);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

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

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

ul, ol { list-style: none; }

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

.text-red { color: var(--color-red); }

.section {
  padding: clamp(60px, 8vw, 100px) 0;
}

.section--gray { background: var(--color-gray); }

.section-header {
  text-align: center;
  margin-bottom: clamp(40px, 6vw, 64px);
}

.section-label {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--color-red);
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 900;
  color: var(--color-navy);
  line-height: 1.3;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 0.95rem;
  color: var(--color-text-sub);
  max-width: 480px;
  margin: 0 auto;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 700;
  font-family: var(--font-main);
  cursor: pointer;
  border: 2px solid transparent;
  transition: background var(--transition), color var(--transition),
              border-color var(--transition), transform var(--transition);
  white-space: nowrap;
}

.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--color-red);
  color: var(--color-white);
  border-color: var(--color-red);
}
.btn--primary:hover { background: var(--color-red-dark); border-color: var(--color-red-dark); }

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

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

.btn--lg { padding: 16px 40px; font-size: 1rem; }

/* ========================================
   Header
   ======================================== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: var(--color-navy);
  transition: box-shadow var(--transition);
}

.header.scrolled { box-shadow: 0 2px 16px rgba(0,0,0,0.2); }

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.header__logo {
  display: flex;
  align-items: center;
}

.header__logo-img {
  height: 40px;
  width: auto;
  object-fit: contain;
}

.header__nav-list {
  display: flex;
  align-items: center;
  gap: clamp(16px, 2vw, 32px);
}

.header__nav-list a {
  color: rgba(255,255,255,0.85);
  font-size: 0.875rem;
  font-weight: 700;
  transition: color var(--transition);
}

.header__nav-list a:not(.btn):hover { color: var(--color-white); }

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

.header__menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* ========================================
   Hero
   ======================================== */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  background: var(--color-navy);
  overflow: hidden;
  padding-top: 68px;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 60% at 80% 50%, rgba(188,0,45,0.18) 0%, transparent 70%),
    radial-gradient(ellipse 40% 60% at 10% 80%, rgba(26,43,74,0.8) 0%, transparent 60%);
}

.hero__inner {
  position: relative;
  z-index: 1;
  max-width: 700px;
}

.hero__eyebrow {
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  color: var(--color-red);
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.hero__title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 900;
  color: var(--color-white);
  line-height: 1.25;
  margin-bottom: 24px;
}

.hero__desc {
  font-size: clamp(0.9rem, 1.5vw, 1.05rem);
  color: rgba(255,255,255,0.8);
  margin-bottom: 40px;
  line-height: 1.9;
}

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

.hero__scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.4);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, rgba(255,255,255,0.4), transparent);
  animation: scrollLine 1.8s ease-in-out infinite;
}

/* ========================================
   About
   ======================================== */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 48px;
  align-items: start;
}

.about__lead {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 16px;
  line-height: 1.7;
}

.about__text p { color: var(--color-text-sub); margin-bottom: 16px; }

.about__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

.badge {
  display: inline-block;
  padding: 4px 12px;
  border: 1.5px solid var(--color-red);
  color: var(--color-red);
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 700;
}

.about__card-inner {
  background: var(--color-navy);
  color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow-card);
}

.about__avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  display: block;
  margin: 0 auto 16px;
  border: 3px solid var(--color-red);
}

.about__card-name { font-size: 1.1rem; font-weight: 700; margin-bottom: 4px; }
.about__card-title { font-size: 0.8rem; color: var(--color-red); font-weight: 700; margin-bottom: 16px; letter-spacing: 0.05em; }
.about__card-desc { font-size: 0.85rem; color: rgba(255,255,255,0.75); line-height: 1.7; }

/* ========================================
   Service
   ======================================== */
.service__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition), transform var(--transition);
  border-top: 3px solid transparent;
}

.service-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
  border-top-color: var(--color-red);
}

.service-card__icon {
  width: 48px;
  height: 48px;
  color: var(--color-red);
  margin-bottom: 20px;
}

.service-card__title {
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--color-navy);
  margin-bottom: 12px;
}

.service-card__desc {
  font-size: 0.875rem;
  color: var(--color-text-sub);
  margin-bottom: 20px;
  line-height: 1.75;
}

.service-card__list {
  border-top: 1px solid var(--color-gray-mid);
  padding-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.service-card__list li {
  font-size: 0.8rem;
  color: var(--color-text-sub);
  padding-left: 16px;
  position: relative;
}

.service-card__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-red);
}

/* ========================================
   Flow
   ======================================== */
.flow__steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
  position: relative;
}

.flow__steps::before {
  content: '';
  position: absolute;
  top: 28px;
  left: calc(12.5% + 28px);
  right: calc(12.5% + 28px);
  height: 2px;
  background: var(--color-gray-mid);
  z-index: 0;
}

.flow__step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  z-index: 1;
}

.flow__step-num {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-red);
  color: var(--color-white);
  font-size: 1rem;
  font-weight: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  flex-shrink: 0;
  letter-spacing: 0.05em;
}

.flow__step-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 8px;
}

.flow__step-desc {
  font-size: 0.8rem;
  color: var(--color-text-sub);
  line-height: 1.7;
}

/* ========================================
   News
   ======================================== */
.news__list { max-width: 760px; margin: 0 auto; }

.news__item {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-gray-mid);
  flex-wrap: wrap;
}

.news__date {
  font-size: 0.8rem;
  color: var(--color-text-sub);
  white-space: nowrap;
  flex-shrink: 0;
}

.news__tag {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--color-red);
  border: 1px solid var(--color-red);
  border-radius: 2px;
  padding: 2px 8px;
  white-space: nowrap;
  flex-shrink: 0;
}

.news__link {
  font-size: 0.9rem;
  color: var(--color-navy);
  font-weight: 700;
  transition: color var(--transition);
}

.news__link:hover { color: var(--color-red); }

/* ========================================
   Contact
   ======================================== */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
}

.form-group { margin-bottom: 24px; }

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 8px;
}

.required {
  color: var(--color-red);
  margin-left: 4px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--color-gray-mid);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-family: var(--font-main);
  color: var(--color-text);
  background: var(--color-white);
  transition: border-color var(--transition), box-shadow var(--transition);
  appearance: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-red);
  box-shadow: 0 0 0 3px rgba(188, 0, 45, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder { color: #BDBDBD; }

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

.form-submit { text-align: center; margin-top: 32px; }

.form-note {
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-sub);
  margin-top: 16px;
}

/* ========================================
   Footer
   ======================================== */
.footer {
  background: var(--color-navy-dark);
  color: rgba(255,255,255,0.7);
  padding: 48px 0 24px;
}

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

.footer__logo-img {
  height: 36px;
  width: auto;
  object-fit: contain;
  filter: brightness(0) invert(1);
  margin-bottom: 8px;
}

.footer__logo {
  font-size: 1.3rem;
  font-weight: 900;
  color: var(--color-white);
  margin-bottom: 8px;
}

.footer__tagline { font-size: 0.8rem; }

.footer__nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
}

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

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

.footer__copy {
  font-size: 0.75rem;
  text-align: center;
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
}

.footer__social {
  display: flex;
  gap: 16px;
  margin-top: 16px;
}

.footer__social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.7);
  transition: background var(--transition), color var(--transition);
}

.footer__social a:hover {
  background: var(--color-red);
  color: var(--color-white);
}

.footer__social svg {
  width: 18px;
  height: 18px;
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 900px) {
  .about__grid { grid-template-columns: 1fr; }
  .about__card { order: -1; }
  .service__grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .flow__steps { grid-template-columns: 1fr; }
  .flow__steps::before { display: none; }
  .flow__step { flex-direction: row; text-align: left; gap: 20px; }
  .flow__step-num { margin-bottom: 0; }
}

@media (max-width: 700px) {
  .header__nav { display: none; }
  .header__nav.is-open {
    display: flex;
    position: fixed;
    inset: 68px 0 0 0;
    background: var(--color-navy);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 32px;
  }
  .header__nav.is-open .header__nav-list {
    flex-direction: column;
    align-items: center;
  }
  .header__menu-btn { display: flex; }
  .header__menu-btn.is-active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
  .header__menu-btn.is-active span:nth-child(2) { opacity: 0; }
  .header__menu-btn.is-active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

  .footer__inner { flex-direction: column; }
}