/* ============================================
   HCSスタートアップ株式会社 コーポレートサイト
   メインスタイルシート
   ダークネイビー × ゴールド × ホワイト基調
   ============================================ */

/* ---- CSS変数 ---- */
:root {
  --navy:       #0a1628;
  --navy-mid:   #112240;
  --navy-light: #1a3158;
  --gold:       #c9a84c;
  --gold-light: #e0c070;
  --gold-dark:  #a8892e;
  --white:      #ffffff;
  --off-white:  #f8f6f1;
  --text-main:  #1a1a2e;
  --text-light: #ccd6f6;
  --text-muted: #8892b0;
  --border:     rgba(201, 168, 76, 0.25);
  --shadow:     0 20px 60px rgba(0,0,0,0.3);
  --trans:      0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ---- リセット & 基本 ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: 'Noto Serif JP', 'Times New Roman', serif;
  background-color: var(--white);
  color: var(--text-main);
  line-height: 1.8;
  overflow-x: hidden;
}

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

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

ul { list-style: none; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ---- スクロールリビール ---- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- ナビゲーション ---- */
#header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  transition: background var(--trans), box-shadow var(--trans);
}
#header.scrolled {
  background: rgba(10, 22, 40, 0.97);
  box-shadow: 0 2px 20px rgba(0,0,0,0.4);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 2.5rem;
  gap: 1.5rem;
}

.nav-logo {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.logo-en {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: 0.08em;
}
.logo-ja {
  font-size: 0.65rem;
  color: var(--text-light);
  letter-spacing: 0.1em;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}
.nav-links a {
  font-size: 0.8rem;
  color: var(--text-light);
  letter-spacing: 0.05em;
  position: relative;
  padding-bottom: 4px;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 1px;
  background: var(--gold);
  transition: width var(--trans);
}
.nav-links a:hover::after { width: 100%; }
.nav-links a:hover { color: var(--gold); }

.nav-cta {
  padding: 0.55rem 1.4rem;
  border: 1px solid var(--gold);
  color: var(--gold);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  border-radius: 2px;
  white-space: nowrap;
}
.nav-cta:hover {
  background: var(--gold);
  color: var(--navy);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-light);
  transition: var(--trans);
}

/* ---- ヒーロー ---- */
#hero {
  position: relative;
  min-height: 100vh;
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 50%, #0d1f3c 100%);
  display: flex;
  align-items: center;
  overflow: hidden;
}
#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 80% 50%, rgba(201,168,76,0.06) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 20% 80%, rgba(26,49,88,0.8) 0%, transparent 60%);
}
#hero::after {
  content: '';
  position: absolute;
  top: -50%; right: -20%;
  width: 700px; height: 700px;
  border: 1px solid rgba(201,168,76,0.08);
  border-radius: 50%;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23c9a84c' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 860px;
  padding: 8rem 2.5rem 5rem;
}

.hero-eyebrow {
  font-family: 'Cormorant Garamond', serif;
  font-size: 0.85rem;
  letter-spacing: 0.3em;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.hero-title {
  font-family: 'Noto Serif JP', serif;
  font-size: clamp(1.6rem, 3.2vw, 2.6rem);
  font-weight: 400;
  color: var(--white);
  line-height: 1.45;
  margin-bottom: 1.8rem;
  letter-spacing: 0.04em;
}
.hero-title .gold { color: var(--gold); }

.hero-sub {
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 2;
  margin-bottom: 3rem;
  letter-spacing: 0.05em;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 2rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}
.stat-item { text-align: center; }
.stat-num {
  display: block;
  font-family: 'Cormorant Garamond', serif;
  font-size: 2.8rem;
  font-weight: 600;
  color: var(--gold);
  line-height: 1;
}
.stat-unit {
  font-family: 'Noto Serif JP', serif;
  font-size: 1rem;
  font-weight: 400;
}
.stat-label {
  display: block;
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  margin-top: 0.4rem;
}
.stat-divider {
  width: 1px;
  height: 50px;
  background: rgba(201,168,76,0.3);
}

.hero-btn {
  display: inline-block;
  padding: 1rem 2.5rem;
  background: transparent;
  border: 1px solid var(--gold);
  color: var(--gold);
  font-size: 0.88rem;
  letter-spacing: 0.12em;
  border-radius: 2px;
  position: relative;
  overflow: hidden;
  z-index: 0;
}
.hero-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--trans);
  z-index: -1;
}
.hero-btn:hover { color: var(--navy); }
.hero-btn:hover::before { transform: scaleX(1); }

.hero-scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}
.hero-scroll span {
  display: block;
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, transparent, var(--gold));
  margin: 0 auto;
  animation: scrollLine 2s ease-in-out infinite;
}
@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ---- セクション共通 ---- */
section { padding: 6rem 0; }

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}
.section-eyebrow {
  font-family: 'Cormorant Garamond', serif;
  font-size: 0.82rem;
  letter-spacing: 0.35em;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 1rem;
}
.section-title {
  font-family: 'Noto Serif JP', serif;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--navy);
  margin-bottom: 1rem;
}
.section-divider {
  width: 60px;
  height: 1px;
  background: var(--gold);
  margin: 1rem auto;
}
.section-desc {
  font-size: 0.92rem;
  color: #555;
  line-height: 2;
  margin-top: 1rem;
}

/* ---- 私たちについて ---- */
#about { background: var(--off-white); }

.about-lead {
  max-width: 800px;
  margin: 0 auto 3.5rem;
  text-align: center;
}
.about-lead p {
  font-size: 0.95rem;
  color: #444;
  line-height: 2.1;
  margin-bottom: 1.2rem;
}

.about-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.8rem;
}
.about-card {
  background: var(--white);
  border: 1px solid rgba(201,168,76,0.2);
  border-top: 3px solid var(--gold);
  padding: 2rem;
  text-align: center;
  transition: var(--trans);
  border-radius: 2px;
}
.about-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.1);
}
.about-card-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--navy), var(--navy-light));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.2rem;
}
.about-card-icon i {
  font-size: 1.5rem;
  color: var(--gold);
}
.about-card h3 {
  font-size: 1rem;
  color: var(--navy);
  margin-bottom: 0.8rem;
  letter-spacing: 0.04em;
}
.about-card p {
  font-size: 0.85rem;
  color: #555;
  line-height: 1.9;
}

/* ---- ソリューション ---- */
#solutions { background: var(--white); }

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}
.solution-card {
  background: var(--navy);
  border: 1px solid var(--border);
  padding: 2.5rem;
  border-radius: 2px;
  position: relative;
  overflow: hidden;
  transition: var(--trans);
}
.solution-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), var(--gold-light));
}
.solution-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 50px rgba(0,0,0,0.4);
  border-color: var(--gold);
}
.solution-number {
  font-family: 'Cormorant Garamond', serif;
  font-size: 3.5rem;
  font-weight: 300;
  color: rgba(201,168,76,0.15);
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  line-height: 1;
}
.solution-icon {
  font-size: 1.8rem;
  color: var(--gold);
  margin-bottom: 1.2rem;
}
.solution-card h3 {
  font-family: 'Noto Serif JP', serif;
  font-size: 1.1rem;
  color: var(--white);
  margin-bottom: 0.3rem;
  letter-spacing: 0.04em;
}
.solution-subtitle {
  font-family: 'Cormorant Garamond', serif;
  font-size: 0.78rem;
  color: var(--gold);
  letter-spacing: 0.15em;
  margin-bottom: 1rem;
}
.solution-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.9;
  margin-bottom: 1.5rem;
}
.solution-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.solution-list li {
  font-size: 0.82rem;
  color: var(--text-light);
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
}
.solution-list li i {
  color: var(--gold);
  font-size: 0.75rem;
  margin-top: 0.25rem;
  flex-shrink: 0;
}

/* ---- 強み ---- */
#strengths { background: var(--off-white); }

.strengths-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}
.strength-item {
  background: var(--white);
  padding: 2rem;
  border-left: 3px solid var(--gold);
  border-radius: 0 2px 2px 0;
  transition: var(--trans);
}
.strength-item:hover {
  transform: translateX(6px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.08);
}
.strength-icon {
  font-size: 1.5rem;
  color: var(--gold);
  margin-bottom: 1rem;
}
.strength-item h3 {
  font-size: 0.95rem;
  color: var(--navy);
  margin-bottom: 0.7rem;
  letter-spacing: 0.04em;
}
.strength-item p {
  font-size: 0.85rem;
  color: #555;
  line-height: 1.9;
}

/* ---- 企業信条 ---- */
#belief {
  background: var(--navy);
  padding: 5rem 0;
}
.belief-inner {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 2rem;
}
.gold-eye { color: var(--gold); }
.belief-title {
  font-family: 'Noto Serif JP', serif;
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 300;
  color: var(--white);
  margin-bottom: 3rem;
  letter-spacing: 0.06em;
}
.belief-list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
.belief-item {
  border-top: 1px solid rgba(201,168,76,0.2);
  padding-top: 1.5rem;
}
.belief-item:first-child { border-top: none; }
.belief-item p {
  font-family: 'Noto Serif JP', serif;
  font-size: clamp(0.95rem, 2vw, 1.1rem);
  color: var(--text-light);
  line-height: 2;
  letter-spacing: 0.06em;
}

/* ---- 代表メッセージ ---- */
#message { background: var(--white); }

.message-layout {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 4rem;
  align-items: start;
}

.message-photo-wrap { text-align: center; }
.message-photo {
  width: 100%;
  max-width: 300px;
  border-radius: 2px;
  margin: 0 auto 1.5rem;
  box-shadow: var(--shadow);
  filter: grayscale(10%);
}
.message-caption {
  background: var(--navy);
  padding: 1.2rem;
  border-top: 3px solid var(--gold);
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  max-width: 300px;
  margin: 0 auto;
  text-align: center;
}
.caption-company {
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
}
.caption-title {
  font-size: 0.78rem;
  color: var(--gold);
  letter-spacing: 0.1em;
}
.caption-name {
  font-family: 'Noto Serif JP', serif;
  font-size: 1.05rem;
  color: var(--white);
  letter-spacing: 0.1em;
}

.message-text-wrap { padding-top: 1rem; }
.message-heading {
  font-family: 'Noto Serif JP', serif;
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  font-weight: 400;
  color: var(--navy);
  margin-bottom: 2rem;
  line-height: 1.6;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}
.message-text-wrap p {
  font-size: 0.92rem;
  color: #444;
  line-height: 2.1;
  margin-bottom: 1.2rem;
}
.message-signature {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}
.sig-company {
  font-size: 0.78rem;
  color: #666;
  letter-spacing: 0.06em;
  margin-bottom: 0.3rem;
}
.sig-title {
  font-size: 0.82rem;
  color: var(--navy);
  letter-spacing: 0.08em;
  margin-bottom: 0.3rem;
}
.sig-name {
  font-family: 'Noto Serif JP', serif;
  font-size: 1.2rem;
  color: var(--navy);
  letter-spacing: 0.1em;
}

/* ---- グループ企業一覧 ---- */
#group { background: var(--off-white); }

.group-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
}
.group-card {
  background: var(--white);
  border: 1px solid rgba(201,168,76,0.15);
  padding: 1.8rem;
  border-radius: 2px;
  position: relative;
  transition: var(--trans);
}
.group-card:hover {
  border-color: var(--gold);
  box-shadow: 0 8px 30px rgba(0,0,0,0.08);
  transform: translateY(-4px);
}
.group-core {
  border-top: 3px solid var(--navy);
  background: linear-gradient(135deg, #f0f3f8, #e8eef5);
}
.group-highlight {
  border-top: 3px solid var(--gold);
  background: linear-gradient(135deg, #fdf8ef, #faf4e4);
}
.group-badge {
  position: absolute;
  top: -10px;
  left: 1.5rem;
  background: var(--navy);
  color: var(--white);
  font-size: 0.68rem;
  padding: 3px 10px;
  letter-spacing: 0.06em;
  border-radius: 2px;
}
.highlight-badge { background: var(--gold); color: var(--navy); }
.group-card h3 {
  font-family: 'Noto Serif JP', serif;
  font-size: 0.95rem;
  color: var(--navy);
  margin-bottom: 0.8rem;
  line-height: 1.6;
}
.group-rep {
  font-size: 0.8rem;
  color: #555;
  margin-bottom: 0.5rem;
}
.group-rep i { color: var(--gold); margin-right: 0.4rem; }
.group-biz {
  font-size: 0.82rem;
  color: #666;
  line-height: 1.7;
}

/* ---- 価値観 ---- */
#values { background: var(--navy); padding: 5rem 0; }

.values-inner {
  text-align: center;
  max-width: 760px;
  margin: 0 auto;
}
#values .section-title { color: var(--white); }
.values-text {
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 2.2;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(201,168,76,0.2);
  padding: 2rem;
  border-radius: 2px;
}
.values-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 2;
}

/* ---- 会社概要 ---- */
#company { background: var(--white); }

.company-table-wrap {
  max-width: 800px;
  margin: 0 auto;
}
.company-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}
.company-table th,
.company-table td {
  padding: 1.2rem 1.5rem;
  border-bottom: 1px solid rgba(201,168,76,0.15);
  text-align: left;
  vertical-align: top;
}
.company-table th {
  width: 30%;
  font-weight: 500;
  color: var(--navy);
  letter-spacing: 0.05em;
  background: rgba(201,168,76,0.05);
}
.company-table td {
  color: #444;
  line-height: 1.9;
}
.table-link {
  color: var(--gold-dark);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.88rem;
}
.table-link:hover { color: var(--gold); }
.table-link i { font-size: 0.75rem; }

/* ---- お問い合わせCTA ---- */
#contact {
  background: linear-gradient(135deg, var(--navy), var(--navy-mid));
  padding: 6rem 0;
}
.contact-inner {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
  padding: 0 2rem;
}
.contact-title {
  font-family: 'Noto Serif JP', serif;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 400;
  color: var(--white);
  margin-bottom: 1.5rem;
  letter-spacing: 0.06em;
}
.contact-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 2;
  margin-bottom: 2.5rem;
}
.contact-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 1rem 2.8rem;
  background: var(--gold);
  color: var(--navy);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  border-radius: 2px;
  transition: var(--trans);
}
.contact-btn:hover {
  background: var(--gold-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(201,168,76,0.35);
}

/* ---- フッター ---- */
#footer {
  background: #050d1a;
  padding: 3.5rem 0 2rem;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  text-align: center;
}
.footer-logo { margin-bottom: 1.5rem; }
.footer-logo-en {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.6rem;
  color: var(--gold);
  letter-spacing: 0.08em;
  display: block;
}
.footer-logo-ja {
  font-size: 0.7rem;
  color: var(--text-muted);
  display: block;
  margin-top: 0.3rem;
  letter-spacing: 0.1em;
}
.footer-info {
  margin-bottom: 1.5rem;
}
.footer-info p {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.9;
}
.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.footer-links a {
  font-size: 0.78rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
}
.footer-links a:hover { color: var(--gold); }
.footer-copy {
  font-size: 0.7rem;
  color: rgba(136,146,176,0.5);
  letter-spacing: 0.08em;
}

/* ---- フローティングCTA ---- */
.floating-cta {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--gold);
  color: var(--navy);
  padding: 0.75rem 1.4rem;
  border-radius: 50px;
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  box-shadow: 0 6px 20px rgba(201,168,76,0.4);
  opacity: 0;
  pointer-events: none;
  transform: translateY(20px);
  transition: var(--trans);
  z-index: 999;
}
.floating-cta.show {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.floating-cta:hover {
  background: var(--gold-light);
  box-shadow: 0 10px 30px rgba(201,168,76,0.5);
}

/* ---- レスポンシブ ---- */
@media (max-width: 1024px) {
  .message-layout { grid-template-columns: 280px 1fr; gap: 2.5rem; }
}

@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .navbar { padding: 1rem 1.5rem; }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 60px; left: 0; right: 0;
    background: rgba(10, 22, 40, 0.98);
    padding: 2rem;
    gap: 1.5rem;
    z-index: 999;
  }
  .nav-links.open a { font-size: 1rem; }

  .message-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .message-photo-wrap { max-width: 280px; margin: 0 auto; }

  section { padding: 4rem 0; }
  .hero-content { padding: 6rem 1.5rem 4rem; }
  .hero-sub { display: none; }
}

@media (max-width: 600px) {
  .hero-stats { gap: 1rem; }
  .stat-num { font-size: 2rem; }
  .solutions-grid, .strengths-grid, .group-grid { grid-template-columns: 1fr; }
  .about-cards { grid-template-columns: 1fr; }
  .company-table th { width: 35%; font-size: 0.8rem; }
  .company-table td { font-size: 0.82rem; }
  .floating-cta span { display: none; }
  .floating-cta { padding: 0.85rem; border-radius: 50%; }
}