/* ------------------------------------------------------------------
           Variables & Reset
        ------------------------------------------------------------------ */
:root {
  /* Colors */
  --accent: #b69e6d;
  --accent-gradient: linear-gradient(
    135deg,
    #1e2538 0%,
    #b69e6d 100%
  ); /* Navy to Gold */
  --accent-gold: #b69e6d;

  --sub: #1e2538; /* Navy */
  --bg: #ffffff;
  --bg-gray: #f5f7fa;

  --text: #333333;
  --text-gray: #666666;
  --white: #ffffff;
  --border: #e5e5e5;

  /* Typography */
  --font-ja: "Noto Sans JP", sans-serif;
  --font-en: "Inter", sans-serif;

  /* Spacing */
  --section-padding: clamp(100px, 10vw, 160px);
  --container-width: 1280px;
  --container-padding: 5vw;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-ja);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.8;
  font-weight: 400;
  overflow-x: hidden;
  letter-spacing: 0.05em;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: inherit;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

ul {
  list-style: none;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ------------------------------------------------------------------
           Utility & Components
        ------------------------------------------------------------------ */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-inline: var(--container-padding);
  position: relative;
  z-index: 2;
}

.section {
  padding-block: var(--section-padding);
  position: relative;
}

/* Background Decorations */
.bg-decoration-text {
  position: absolute;
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 15vw;
  color: rgba(0, 0, 0, 0.02);
  line-height: 1;
  z-index: 0;
  pointer-events: none;
  white-space: nowrap;
}

/* Text Styles */
.en-font {
  font-family: var(--font-en);
}

.text-gradient {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

.section-header {
  margin-bottom: 5rem;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

/* 英字（メイン・大きく） */
.section-title {
  font-family: var(--font-en);
  font-size: clamp(3rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1;
  color: var(--sub);
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
  order: 1; /* 英字を上に */
}

/* 日本語（サブ・小さく） */
.section-subtitle {
  font-family: var(--font-ja);
  font-size: 1rem;
  letter-spacing: 0.1em;
  color: var(--accent-gold);
  font-weight: 600;
  display: block;
  order: 2; /* 日本語を下に */
}

.circle-btn {
  width: auto;
  height: auto;
  border-radius: 0;
  border: none;
  background-color: #2e385f;
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 3rem;
  font-family: var(--font-en);
  font-weight: 500;
  letter-spacing: 0.05em;
  gap: 1rem;
  transition: all 0.3s ease;
  cursor: pointer;
  text-decoration: none;
}

.circle-btn:hover {
  background-color: #1a223e;
  color: #ffffff;
  transform: translateY(-3px);
  opacity: 0.9;
}

/* Header Contact Button */
.nav-link.header-contact-btn {
  background-color: #2e385f;
  color: #ffffff !important;
  padding: 20px;
  display: inline-block;
  line-height: 1;
  transition: opacity 0.3s ease;
}

.nav-link.header-contact-btn:hover {
  opacity: 0.8;
}

/* Animations */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity 1s ease,
    transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.delay-100 {
  transition-delay: 0.1s;
}
.delay-200 {
  transition-delay: 0.2s;
}
.delay-300 {
  transition-delay: 0.3s;
}

/* Secondary Button (Outline) */
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 3rem;
  border: 1px solid var(--sub);
  background-color: transparent;
  color: var(--sub);
  font-family: var(--font-en);
  font-weight: 500;
  letter-spacing: 0.05em;
  gap: 1rem;
  transition: all 0.3s ease;
  cursor: pointer;
  text-decoration: none;
  margin-top: 3rem;
}

.btn-outline:hover {
  background-color: var(--sub);
  color: #ffffff;
  transform: translateY(-3px);
}

.btn-center-wrapper {
  text-align: center;
}

/* ------------------------------------------------------------------
           Header
        ------------------------------------------------------------------ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  padding: 2rem 0;
  transition: all 0.4s ease;
}

.header.scrolled {
  background-color: rgba(255, 255, 255, 0.95);
  padding: 1rem 0;
  box-shadow: 0 1px 10px rgba(0, 0, 0, 0.05);
}

.header.scrolled .logo {
  color: var(--sub);
}
.header.scrolled .nav-link {
  color: var(--sub);
}
.header.scrolled .menu-toggle {
  color: var(--sub);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  z-index: 101;
  transition: color 0.4s;
}

.nav-menu {
  display: flex;
  gap: 3rem;
  align-items: center;
}

.nav-link {
  font-size: 0.85rem;
  font-weight: 500;
  color: #fff;
  position: relative;
  transition: color 0.4s;
  letter-spacing: 0.05em;
}

.nav-link:hover {
  opacity: 0.7;
}

.menu-toggle {
  display: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  z-index: 2000;
}

/* ------------------------------------------------------------------
           Hero
        ------------------------------------------------------------------ */
.hero {
  height: 100svh;
  width: 100%;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-bg,
.hero-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.hero-bg {
  z-index: 0;
}

.hero-slide {
  background-size: cover;
  background-position: center;
  opacity: 0;
  transform: scale(1.1);
  transition:
    opacity 2s ease,
    transform 10s linear;
}

.hero-slide.active {
  opacity: 1;
  transform: scale(1);
}

.hero-slide::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.3);
}

.hero-content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: var(--container-width);
  padding-inline: var(--container-padding);
  color: #fff;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 1.5rem;
  letter-spacing: 0.05em;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.hero-sub {
  font-family: var(--font-en);
  font-size: clamp(0.9rem, 1.5vw, 1.1rem);
  letter-spacing: 0.2em;
  font-weight: 300;
  opacity: 0.9;
  margin-bottom: 3rem;
  text-transform: uppercase;
}

.scroll-down {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  color: #fff;
  font-family: var(--font-en);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  opacity: 0.8;
}

.scroll-line {
  width: 1px;
  height: 60px;
  background: rgba(255, 255, 255, 0.5);
  position: relative;
  overflow: hidden;
}

.scroll-line::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #fff;
  transform: translateY(-100%);
  animation: scrollDown 2s cubic-bezier(0.77, 0, 0.175, 1) infinite;
}

@keyframes scrollDown {
  0% {
    transform: translateY(-100%);
  }
  100% {
    transform: translateY(100%);
  }
}

/* ------------------------------------------------------------------
           Mission (Overlap Layout) - Refined
        ------------------------------------------------------------------ */
.mission {
  background-color: var(--bg);
  padding-bottom: 0;
  margin-bottom: var(--section-padding);
}

.mission-wrapper {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.mission-img-area {
  width: 100%;
  height: 450px;
  position: relative;
  z-index: 1;
}

.mission-img-area img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%) contrast(1.1);
  transition: filter 0.5s ease;
}

.mission-wrapper:hover .mission-img-area img {
  filter: grayscale(0%) contrast(1);
}

.mission-content-box {
  position: relative;
  width: 90%;
  max-width: 1100px;
  background: #fff;
  padding: 5rem 6rem;
  z-index: 2;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.05);
  margin-top: -150px; /* Overlap image */
  margin-bottom: 3rem;
}

.mission-lead {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 2rem;
  line-height: 1.6;
}

.mission-desc {
  font-size: 1rem;
  color: var(--text-gray);
  line-height: 2;
  margin-bottom: 1.5rem;
}

.mission-bg-text {
  top: -5%;
  left: -10%;
}

/* ------------------------------------------------------------------
           Services
        ------------------------------------------------------------------ */
.services {
  background-color: var(--bg-gray);
  position: relative;
  overflow: hidden;
}

.service-top-area {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 5rem;
  position: relative;
  z-index: 2;
}

.service-top-left {
  max-width: 600px;
}

.service-message {
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.service-top-right {
  text-align: right;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  position: relative;
  z-index: 2;
}

.service-card {
  background: #fff;
  padding: 3rem 2rem;
  position: relative;
  transition:
    transform 0.4s ease,
    box-shadow 0.4s ease;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.service-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.05);
}

.service-num-box {
  width: 50px;
  height: 50px;
  background: var(--accent-gradient);
  color: #fff;
  font-family: var(--font-en);
  font-size: 1.2rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 2rem;
  font-style: italic;
}

.service-card-title {
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 0.5rem;
  color: var(--sub);
  min-height: 3.6em;
}

.service-card-en {
  font-family: var(--font-en);
  font-size: 0.8rem;
  color: var(--text-gray);
  margin-bottom: 1.5rem;
  display: block;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.service-card-desc {
  font-size: 0.9rem;
  color: var(--text-gray);
  line-height: 1.8;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.service-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent-gold);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: auto;
  transition: gap 0.3s;
}

.service-link:hover {
  gap: 1rem;
}

.service-bg-text {
  bottom: -5%;
  right: -5%;
}

.service-bottom-cta {
  display: none;
}

/* ------------------------------------------------------------------
           Features (Why Us)
        ------------------------------------------------------------------ */
.features {
  background-color: #f0f2f5; /* 視認性を上げるため少し濃いグレーに */
  background-image: radial-gradient(rgba(0, 0, 0, 0.05) 1px, transparent 1px);
  background-size: 30px 30px;
  color: var(--text);
  position: relative;
  overflow: hidden;
}

.features::before {
  display: none; /* 古いパターンを削除 */
}

.feature-header {
  text-align: center;
  margin-bottom: 5rem;
}

.feature-card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
  position: relative;
  z-index: 2;
}

.feature-card {
  background: #fff;
  color: var(--text);
  padding: 3rem 2rem;
  position: relative;
  transition: all 0.4s ease;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05); /* 影を調整して浮き上がらせる */
  border: none;
  border-radius: 4px; /* 少し柔らかく */
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.feature-bg-num {
  position: absolute;
  bottom: -20px;
  right: -10px;
  font-family: var(--font-en);
  font-size: 6rem;
  font-weight: 700;
  color: rgba(0, 0, 0, 0.05);
  line-height: 1;
}

.feature-icon-box {
  font-size: 2.5rem;
  color: var(--accent-gold);
  margin-bottom: 1.5rem;
}

.feature-card h3 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  line-height: 1.4;
  color: var(--sub);
  border-bottom: 2px solid var(--accent-gold);
  padding-bottom: 1rem;
  display: block;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--text-gray);
  line-height: 1.8;
}

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

.news-list {
  margin-top: 3rem;
}

.news-item {
  border-top: 1px solid var(--border);
  transition: background-color 0.3s;
}
.news-item:last-child {
  border-bottom: 1px solid var(--border);
}

.news-link {
  display: grid;
  grid-template-columns: 140px 1fr auto;
  align-items: center;
  padding: 2.5rem 1rem;
  gap: 2rem;
  color: var(--text);
}

.news-link[data-disabled-link="true"] {
  cursor: default;
}
.news-date {
  font-family: var(--font-en);
  font-size: 0.9rem;
  color: var(--text-gray);
}
.news-title {
  font-weight: 500;
  font-size: 1.05rem;
}

.news-arrow {
  color: var(--accent-gold);
  opacity: 0;
  transform: translateX(-10px);
  transition: all 0.3s;
}
.news-link:not([data-disabled-link="true"]):hover .news-arrow {
  opacity: 1;
  transform: translateX(0);
}

/* ------------------------------------------------------------------
           Note
        ------------------------------------------------------------------ */
.note {
  background-color: var(--bg);
  position: relative;
}

.note-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  position: relative;
  z-index: 2;
}

.note-card {
  background: #fff;
  display: block;
  height: 100%;
  transition:
    transform 0.4s ease,
    box-shadow 0.4s ease;
}
.note-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.note-img-wrap {
  width: 100%;
  aspect-ratio: 16/9;
  overflow: hidden;
}
.note-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.note-card:hover .note-img {
  transform: scale(1.05);
}

.note-content {
  padding: 2rem;
}
.note-date {
  font-size: 0.8rem;
  color: var(--text-gray);
  margin-bottom: 0.8rem;
  font-family: var(--font-en);
  display: block;
}
.note-title {
  font-size: 1.05rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
  line-height: 1.6;
  color: var(--sub);
}
.note-link-text {
  font-size: 0.85rem;
  color: var(--accent-gold);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.note-bg-text {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 20vw;
  opacity: 0.03;
}

/* ------------------------------------------------------------------
           Bottom Links (Company / Contact)
        ------------------------------------------------------------------ */
.bottom-links {
  display: flex;
  width: 100%;
  height: 450px;
}

.bottom-link-item {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  text-decoration: none;
  color: #fff;
}

/* Company Image: Increase saturation */
.bottom-link-item:first-child .bottom-link-bg {
  filter: saturate(1.5);
}

.bottom-link-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.bottom-link-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  transition: background-color 0.4s ease;
}

/* Company: Dark Navy (Cool & Dark tone) */
.bottom-link-item:first-child .bottom-link-overlay {
  background-color: rgba(10, 20, 40, 0.85); /* かなり暗いネイビー */
}

/* Contact: Light Grayish (Bright tone) */
.bottom-link-item:last-child .bottom-link-overlay {
  background-color: rgba(40, 40, 40, 0.4); /* 明るさを残した薄いグレー */
}

.bottom-link-content {
  position: relative;
  z-index: 2;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.bottom-link-en {
  font-family: var(--font-en);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  display: block;
}

.bottom-link-ja {
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  font-weight: 500;
  display: block;
  margin-top: 0.5rem;
}

.bottom-link-icon {
  width: 50px;
  height: 50px;
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: all 0.4s ease;
}

.bottom-link-item:hover .bottom-link-bg {
  transform: scale(1.05);
}
.bottom-link-item:hover .bottom-link-overlay {
  background-color: rgba(182, 158, 109, 0.7);
}
.bottom-link-item:hover .bottom-link-icon {
  background-color: #fff;
  color: var(--accent-gold);
  border-color: #fff;
  transform: scale(1.1);
}

/* ------------------------------------------------------------------
           Footer
        ------------------------------------------------------------------ */
.footer {
  background-color: var(--sub); /* Navy */
  color: #ccc;
  padding: 5rem 0 2rem;
  font-size: 0.85rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 3rem;
  margin-bottom: 2rem;
}

.footer-logo {
  color: #fff;
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  display: inline-block;
}

.footer-address {
  line-height: 1.8;
  font-size: 0.85rem;
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  text-align: right;
}

.footer-nav a {
  transition: color 0.3s;
}
.footer-nav a:hover {
  color: #fff;
}

.footer-nav-list {
  display: flex;
  gap: 2rem;
  margin-bottom: 1rem;
}

.footer-policy {
  font-size: 0.8rem;
}

.copyright {
  text-align: center;
  font-family: var(--font-en);
  font-size: 0.75rem;
  opacity: 0.6;
}

/* ------------------------------------------------------------------
           Responsive
        ------------------------------------------------------------------ */
@media (max-width: 900px) {
  .pc-br {
    display: none;
  }

  .hero-title {
    font-size: 2.5rem;
    line-height: 1.4;
  }

  .future-content p {
    text-align: left !important;
    line-height: 1.8 !important;
    font-size: 0.95rem !important;
  }

  .service-message {
    text-align: left;
    font-size: 1rem;
  }

  /* Mission */
  .mission-img-area {
    height: 300px;
  }
  .mission-content-box {
    width: 95%;
    margin-top: -50px;
    padding: 2.5rem 1.5rem;
    margin-bottom: 0;
  }

  /* Service */
  .service-top-area {
    flex-direction: column-reverse;
    align-items: flex-start;
    gap: 2rem;
  }
  .service-top-right {
    text-align: left;
    width: 100%;
  }
  .service-top-right .section-header {
    align-items: flex-start !important;
  }
  .service-top-right .circle-btn {
    margin-left: 0 !important;
  }
  .service-top-button {
    display: none;
  }
  .service-bottom-cta {
    display: flex;
    justify-content: center;
    margin-top: 2.5rem;
  }
  .service-grid {
    grid-template-columns: 1fr;
  }

  /* Features */
  .feature-card-grid,
  .note-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .news-link {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }

  .bottom-links {
    flex-direction: column;
    height: auto;
  }
  .bottom-link-item {
    width: 100%;
    height: 300px;
  }

  /* Mobile Menu Overlay Style */
  .nav-menu {
    display: flex;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--sub); /* Navy background */
    flex-direction: column;
    justify-content: center;
    align-items: center;
    /* transform: translateX(100%);  <-- 削除 */
    /* transition: transform 0.4s ease, opacity 0.4s ease; <-- 変更 */
    transition:
      opacity 0.3s ease,
      visibility 0.3s ease;
    opacity: 0;
    visibility: hidden;
    z-index: 1999;
    padding: 2rem;
  }

  .nav-menu.active {
    /* transform: translateX(0); <-- 削除 */
    opacity: 1;
    visibility: visible;
  }

  .header.scrolled .nav-menu .nav-link,
  .nav-link {
    font-size: 1.2rem;
    color: #ffffff !important;
    margin-bottom: 1.5rem;
    width: 100%;
    text-align: center;
    display: block;
  }

  .menu-toggle {
    display: block;
    z-index: 2000; /* Above menu */
    position: relative;
  }

  .header.scrolled .menu-toggle.active {
    color: #ffffff !important;
  }

  /* Ensure header CTA inside menu is styled correctly */
  .nav-menu .header-contact-btn {
    margin-top: 0;
    width: auto;
    max-width: none;
    text-align: center;
    padding: 0 !important;
    background-color: transparent !important;
    color: #fff !important;
    border: none;
    display: block;
  }

  .footer-inner {
    flex-direction: column;
    gap: 3rem;
  }
  .footer-nav {
    text-align: left;
  }
  .footer-nav-list {
    flex-direction: column;
    gap: 1rem;
  }
}

@media screen and (max-width: 480px) {
  .section-header {
    margin-bottom: 2rem;
  }
  .section-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
  }
  .news-link {
    padding: 1.5rem 1rem;
  }
}