/* ==================================================
   1. 基本設定（色・影・角丸）
================================================== */
:root {
  --navy:#07182f;
  --blue:#0d6efd;
  --cyan:#30c7ff;
  --sky:#eaf7ff;
  --text:#162033;
  --muted:#64748b;
  --line:#dbe7f3;
  --white:#fff;
  --shadow:0 18px 60px rgba(8,31,64,.14);
  --radius:24px
}

/* ==================================================
   2. リセット・共通レイアウト
================================================== */
* {
  box-sizing:border-box
}

html {
  scroll-behavior:smooth
}

body {
  margin:0;
  font-family:"Noto Sans JP","Hiragino Kaku Gothic ProN",Meiryo,sans-serif;
  color:var(--text);
  background:#fff;
  line-height:1.75
}

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

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

.container {
  width:min(1180px,calc(100% - 40px));
  margin:auto
}

.section {
  padding:96px 0
}

.eyebrow {
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-weight:800;
  color:var(--blue);
  letter-spacing:.12em;
  text-transform:uppercase;
  font-size:.78rem
}

.eyebrow:before {
  content:"";
  width:34px;
  height:2px;
  background:linear-gradient(90deg,var(--blue),var(--cyan))
}

.section-title {
  font-size:clamp(2rem,4vw,3.4rem);
  line-height:1.18;
  margin:14px 0 18px;
  letter-spacing:-.035em
}

.section-lead {
  max-width:760px;
  color:var(--muted);
  font-size:1.04rem
}

.grid {
  display:grid;
  gap:24px
}

.btn {
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:12px;
  min-height:54px;
  padding:0 24px;
  border-radius:999px;
  font-weight:800;
  transition:.25s;
  border:1px solid transparent
}

.btn-primary {
  background:linear-gradient(135deg,var(--blue),#16a7e8);
  color:#fff;
  box-shadow:0 12px 30px rgba(13,110,253,.28)
}

.btn-primary:hover {
  transform:translateY(-2px);
  box-shadow:0 16px 34px rgba(13,110,253,.36)
}

.btn-outline {
  border-color:rgba(255,255,255,.4);
  color:#fff;
  background:rgba(255,255,255,.08);
  backdrop-filter:blur(10px)
}

.btn-dark {
  background:var(--navy);
  color:#fff
}

/* ==================================================
   3. ヘッダー・ナビゲーション
================================================== */
.site-header {
  position:fixed;
  left:0;
  right:0;
  top:0;
  z-index:1000;
  transition:.25s
}

.site-header.scrolled {
  background:rgba(5,19,39,.9);
  backdrop-filter:blur(14px);
  box-shadow:0 10px 30px rgba(0,0,0,.16)
}

.header-inner {
  height:84px;
  display:flex;
  align-items:center;
  justify-content:space-between
}

.logo {
  display:flex;
  align-items:center;
  gap:12px;
  color:#fff;
  font-weight:900;
  letter-spacing:.02em
}

.logo-mark {
  width:42px;
  height:42px;
  border-radius:13px;
  background:linear-gradient(145deg,var(--cyan),var(--blue));
  display:grid;
  place-items:center;
  box-shadow:0 8px 24px rgba(48,199,255,.28)
}

.logo-mark svg {
  width:26px
}

.nav {
  display:flex;
  align-items:center;
  gap:24px;
  color:#fff;
  font-weight:700;
  font-size:.92rem
}

.nav a {
  opacity:.88
}

.nav a:hover,.nav a.active {
  opacity:1;
  color:#7edcff
}

.nav-cta {
  padding:11px 18px;
  border-radius:999px;
  background:#fff;
  color:var(--navy)!important
}

.menu-btn {
  display:none;
  border:0;
  background:transparent;
  color:#fff;
  font-size:1.7rem
}

/* ==================================================
   4. トップページのメインビジュアル
================================================== */
.hero {
  min-height:100vh;
  position:relative;
  display:flex;
  align-items:center;
  overflow:hidden;
  background:radial-gradient(circle at 78% 18%,rgba(48,199,255,.35),transparent 28%),linear-gradient(135deg,#061428 0%,#0a3158 48%,#0b7db6 100%)
}

.hero:after {
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,rgba(2,11,24,.83),rgba(2,11,24,.45) 50%,rgba(2,11,24,.2))
}

.hero video {
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  opacity:.45
}

.hero-grid {
  position:absolute;
  inset:0;
  opacity:.16;
  background-image:linear-gradient(rgba(255,255,255,.22) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.22) 1px,transparent 1px);
  background-size:54px 54px;
  transform:perspective(500px) rotateX(62deg) scale(1.5);
  transform-origin:center bottom
}

.hero-content {
  position:relative;
  z-index:2;
  color:#fff;
  padding-top:80px;
  max-width:840px
}

.hero-badge {
  display:inline-flex;
  gap:10px;
  align-items:center;
  padding:8px 14px;
  border:1px solid rgba(255,255,255,.25);
  background:rgba(255,255,255,.08);
  border-radius:999px;
  backdrop-filter:blur(10px);
  font-size:.82rem;
  font-weight:800
}

.hero h1 {
  font-size:clamp(3.2rem,8vw,7.2rem);
  line-height:.98;
  margin:26px 0 24px;
  letter-spacing:-.065em
}

.hero h1 span {
  background:linear-gradient(90deg,#fff,#7de2ff);
  -webkit-background-clip:text;
  color:transparent
}

.hero p {
  font-size:clamp(1rem,2vw,1.25rem);
  max-width:690px;
  color:#d9ecfa
}

.hero-actions {
  display:flex;
  gap:14px;
  flex-wrap:wrap;
  margin-top:34px
}

.hero-stats {
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  max-width:680px;
  margin-top:56px;
  border-top:1px solid rgba(255,255,255,.2);
  padding-top:24px
}

.hero-stats strong {
  display:block;
  font-size:1.65rem
}

.hero-stats span {
  font-size:.83rem;
  color:#bdd3e4
}

.scroll-indicator {
  position:absolute;
  right:40px;
  bottom:34px;
  z-index:3;
  color:#fff;
  font-size:.72rem;
  letter-spacing:.18em;
  writing-mode:vertical-rl
}

.scroll-indicator:after {
  content:"";
  display:block;
  width:1px;
  height:70px;
  background:linear-gradient(#fff,transparent);
  margin:14px auto 0
}

/* ==================================================
   5. 特徴・サービスカード
================================================== */
.feature-strip {
  margin-top:-46px;
  position:relative;
  z-index:5
}

.feature-panel {
  background:#fff;
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  display:grid;
  grid-template-columns:repeat(4,1fr);
  overflow:hidden
}

.feature-item {
  padding:28px;
  border-right:1px solid var(--line)
}

.feature-item:last-child {
  border-right:0
}

.feature-icon {
  width:46px;
  height:46px;
  border-radius:14px;
  background:var(--sky);
  display:grid;
  place-items:center;
  color:var(--blue);
  font-weight:900
}

.feature-item h3 {
  margin:16px 0 6px
}

.feature-item p {
  margin:0;
  color:var(--muted);
  font-size:.9rem
}

.cards-3 {
  grid-template-columns:repeat(3,1fr)
}

.card {
  background:#fff;
  border:1px solid var(--line);
  border-radius:22px;
  padding:30px;
  transition:.25s;
  position:relative;
  overflow:hidden
}

.card:hover {
  transform:translateY(-6px);
  box-shadow:var(--shadow);
  border-color:transparent
}

.card:before {
  content:"";
  position:absolute;
  right:-40px;
  top:-40px;
  width:110px;
  height:110px;
  border-radius:50%;
  background:linear-gradient(145deg,rgba(13,110,253,.12),rgba(48,199,255,.05))
}

.card-no {
  font-weight:900;
  color:#9ecbe9;
  font-size:.82rem
}

.card h3 {
  font-size:1.25rem;
  margin:14px 0 8px
}

.card p {
  color:var(--muted);
  margin:0
}

/* ==================================================
   6. 技術紹介・点群演出
================================================== */
.dark-section {
  background:var(--navy);
  color:#fff;
  position:relative;
  overflow:hidden
}

.dark-section:before {
  content:"";
  position:absolute;
  width:520px;
  height:520px;
  border-radius:50%;
  background:rgba(0,169,255,.14);
  filter:blur(20px);
  right:-200px;
  top:-150px
}

.split {
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:64px;
  align-items:center
}

.visual-box {
  min-height:370px;
  border-radius:28px;
  position:relative;
  overflow:hidden;
  background:linear-gradient(145deg,#113b66,#0b8dc1);
  box-shadow:0 28px 70px rgba(0,0,0,.25)
}

.visual-box img {
  width:100%;
  height:100%;
  object-fit:cover;
  opacity:.82
}

.point-cloud {
  position:absolute;
  inset:0;
  background-image:radial-gradient(circle,#7ee8ff 1.3px,transparent 1.4px);
  background-size:18px 18px;
  mask-image:linear-gradient(120deg,transparent 15%,#000 55%,transparent 90%);
  animation:drift 10s linear infinite
}

.scan-line {
  position:absolute;
  left:0;
  right:0;
  height:3px;
  background:#6ff;
  box-shadow:0 0 18px #6ff;
  animation:scan 4s ease-in-out infinite
}

.tech-list {
  display:grid;
  gap:18px;
  margin-top:30px
}

.tech-item {
  display:flex;
  gap:16px
}

.tech-item b {
  display:grid;
  place-items:center;
  flex:0 0 34px;
  height:34px;
  border-radius:50%;
  background:linear-gradient(145deg,var(--blue),var(--cyan))
}

.tech-item p {
  margin:2px 0;
  color:#bfd2e2
}

/* ==================================================
   7. 実績紹介
================================================== */
.works-grid {
  grid-template-columns:repeat(12,1fr)
}

.work-card {
  min-height:310px;
  border-radius:24px;
  overflow:hidden;
  position:relative;
  background:#123
}

.work-card:nth-child(1) {
  grid-column:span 7
}

.work-card:nth-child(2) {
  grid-column:span 5
}

.work-card:nth-child(3),.work-card:nth-child(4),.work-card:nth-child(5) {
  grid-column:span 4
}

.work-card img {
  width:100%;
  height:100%;
  object-fit:cover;
  transition:.5s
}

.work-card:hover img {
  transform:scale(1.05)
}

.work-overlay {
  position:absolute;
  inset:auto 0 0;
  padding:60px 24px 22px;
  background:linear-gradient(transparent,rgba(3,18,36,.92));
  color:#fff
}

.work-overlay small {
  color:#7edcff;
  font-weight:800
}

/* ==================================================
   8. お問い合わせ誘導
================================================== */
.cta {
  border-radius:30px;
  background:linear-gradient(135deg,#0a2b51,#0d79b8);
  color:#fff;
  padding:54px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:30px;
  position:relative;
  overflow:hidden
}

.cta:after {
  content:"";
  position:absolute;
  width:300px;
  height:300px;
  border:1px solid rgba(255,255,255,.18);
  border-radius:50%;
  right:-70px;
  top:-130px
}

/* ==================================================
   9. 下層ページ共通
================================================== */
.page-hero {
  padding:170px 0 90px;
  background:radial-gradient(circle at 80% 20%,rgba(48,199,255,.3),transparent 25%),linear-gradient(135deg,#061428,#0a5c91);
  color:#fff
}

.breadcrumb {
  font-size:.82rem;
  color:#b9d6e8
}

.page-hero h1 {
  font-size:clamp(2.7rem,6vw,5.2rem);
  margin:20px 0 10px
}

.content-card {
  background:#fff;
  border:1px solid var(--line);
  border-radius:24px;
  padding:32px
}

.service-detail {
  grid-template-columns:repeat(2,1fr)
}

.service-detail .content-card {
  display:grid;
  grid-template-columns:78px 1fr;
  gap:20px
}

.service-num {
  font-size:2rem;
  font-weight:900;
  color:#b8daf0
}

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

.table th,.table td {
  padding:18px;
  border-bottom:1px solid var(--line);
  text-align:left
}

.table th {
  width:28%;
  color:var(--muted)
}

/* ==================================================
   10. お問い合わせフォーム
================================================== */
.form-grid {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:18px
}

.field {
  display:grid;
  gap:8px
}

.field.full {
  grid-column:1/-1
}

.field label {
  font-weight:800
}

.field input,.field select,.field textarea {
  width:100%;
  padding:15px 16px;
  border:1px solid #cddbea;
  border-radius:12px;
  font:inherit
}

.field textarea {
  min-height:160px;
  resize:vertical
}

.notice {
  padding:16px;
  border-radius:14px;
  background:var(--sky);
  color:#31536d;
  font-size:.9rem
}

/* ==================================================
   11. フッター
================================================== */
.site-footer {
  background:#041326;
  color:#c6d7e4;
  padding:70px 0 24px
}

.footer-grid {
  display:grid;
  grid-template-columns:1.6fr repeat(3,1fr);
  gap:40px
}

.footer-title {
  color:#fff;
  font-weight:900;
  margin-bottom:14px
}

.footer-links {
  display:grid;
  gap:8px;
  font-size:.9rem
}

.copyright {
  border-top:1px solid rgba(255,255,255,.1);
  margin-top:50px;
  padding-top:22px;
  font-size:.8rem
}

/* ==================================================
   12. スクロールアニメーション
================================================== */
.reveal {
  opacity:0;
  transform:translateY(24px);
  transition:.7s
}

.reveal.show {
  opacity:1;
  transform:none
}

@keyframes scan {
  0%,100% {
    top:10%
  }

  50% {
    top:90%
  }

}

@keyframes drift {
  to {
    background-position:180px 90px
  }

}

/* ==================================================
   13. タブレット表示（900px以下）
================================================== */
@media(max-width:900px) {
  .nav {
    position:fixed;
    inset:84px 16px auto;
    background:rgba(5,19,39,.97);
    padding:22px;
    border-radius:18px;
    display:none;
    flex-direction:column;
    align-items:flex-start
  }

  .nav.open {
    display:flex
  }

  .menu-btn {
    display:block
  }

  .feature-panel {
    grid-template-columns:1fr 1fr
  }

  .feature-item:nth-child(2) {
    border-right:0
  }

  .cards-3,.split,.service-detail,.footer-grid {
    grid-template-columns:1fr
  }

  .works-grid {
    display:grid;
    grid-template-columns:1fr
  }

  .work-card,.work-card:nth-child(n) {
    grid-column:auto
  }

  .visual-box {
    min-height:390px
  }

  .cta {
    align-items:flex-start;
    flex-direction:column
  }

  .hero-stats {
    grid-template-columns:1fr 1fr 1fr
  }

  .form-grid {
    grid-template-columns:1fr
  }

  .field.full {
    grid-column:auto
  }

}

/* ==================================================
   14. スマートフォン表示（600px以下）
================================================== */
@media(max-width:600px) {
  .container {
    width:min(100% - 28px,1180px)
  }

  .section {
    padding:72px 0
  }

  .header-inner {
    height:72px
  }

  .nav {
    inset:72px 12px auto
  }

  .hero h1 {
    font-size:3.2rem
  }

  .hero-stats {
    gap:14px
  }

  .hero-stats strong {
    font-size:1.25rem
  }

  .feature-panel {
    grid-template-columns:1fr
  }

  .feature-item {
    border-right:0;
    border-bottom:1px solid var(--line)
  }

  .feature-item:last-child {
    border-bottom:0
  }

  .service-detail .content-card {
    grid-template-columns:1fr
  }

  .cta {
    padding:34px
  }

  .page-hero {
    padding:135px 0 65px
  }

  .table th,.table td {
    display:block;
    width:100%;
    padding:12px 0
  }

  .table th {
    padding-bottom:0;
    border-bottom:0
  }

  .logo small {
    display:none
  }

}

/* =========================
   新着情報
========================= */

.news-section {
  padding: 80px 20px;
  background: #f5f8fa;
}

.news-section .container {
  width: min(1100px, 100%);
  margin: 0 auto;
}

.news-heading {
  margin-bottom: 35px;
  text-align: center;
}

.news-heading .news-en {
  margin: 0 0 5px;
  color: #0d6da8;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.18em;
}

.news-heading h2 {
  margin: 0;
  color: #17344a;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
}

.news-list {
  border-top: 1px solid #d7e0e6;
  background: #fff;
}

.news-item {
  display: grid;
  grid-template-columns: 130px 110px 1fr;
  align-items: center;
  gap: 20px;
  padding: 22px 25px;
  border-bottom: 1px solid #d7e0e6;
  color: #263845;
  text-decoration: none;
  transition: background-color 0.25s ease;
}

.news-item:hover {
  background: #edf6fb;
}

.news-item time {
  color: #64727c;
  font-size: 0.9rem;
}

.news-category {
  display: inline-block;
  padding: 5px 10px;
  border: 1px solid #0d6da8;
  border-radius: 3px;
  color: #0d6da8;
  font-size: 0.75rem;
  text-align: center;
}

.news-item p {
  margin: 0;
  line-height: 1.7;
}

.news-more {
  margin-top: 35px;
  text-align: center;
}

.news-more a {
  display: inline-block;
  min-width: 220px;
  padding: 14px 30px;
  border: 1px solid #0d6da8;
  color: #0d6da8;
  text-decoration: none;
  transition: 0.25s;
}

.news-more a:hover {
  background: #0d6da8;
  color: #fff;
}

@media (max-width: 768px) {
  .news-section {
    padding: 55px 15px;
  }

  .news-item {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 18px;
  }

  .news-category {
    width: fit-content;
  }
}