:root{
  --bg:#ffffff;
  --card:#ffffff;
  --text:#222222;
  --muted:#555555;
  --line: rgba(0,0,0,.12);
  --accent:#1f6feb; /* 信頼感のある青 */
  --max: 1120px;
  --radius: 14px;
  --shadow: 0 6px 18px rgba(0,0,0,.08);
}

*{ box-sizing:border-box; }
html,body{ margin:0; padding:0; }
body{
  font-family: system-ui, -apple-system, Segoe UI, Roboto, "Noto Sans JP", sans-serif;
  color:var(--text);
  background:#ffffff;
  line-height:1.7;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }

.container{ width:min(var(--max), 100% - 32px); margin-inline:auto; }
.section{ padding: clamp(48px, 6vw, 88px) 0; }
.section--alt{
  background:#f7f7f7;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.section-head h2{ margin:0 0 8px; font-size: clamp(22px, 3vw, 32px); }
.section-head p{ margin:0; color:var(--muted); }

.btn{
  display:inline-flex; align-items:center; justify-content:center;
  gap:.5rem;
  background: var(--accent);
  color:#041018;
  padding: 12px 16px;
  border-radius: 999px;
  border:0;
  font-weight:700;
  box-shadow: 0 8px 22px rgba(102,217,255,.25);
}
.btn--ghost{
  background: transparent;
  color: var(--text);
  border:1px solid var(--line);
  box-shadow:none;
}
.btn--small{ padding: 10px 14px; font-size: 14px; }

.card{
  background: rgba(255,255,255,.04);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}

.grid{ display:grid; gap: 18px; }
.grid--3{ grid-template-columns: repeat(3, 1fr); }
@media (max-width: 900px){
  .grid--3{ grid-template-columns: 1fr; }
}

/* Header */
.site-header{
  position: sticky; top:0; z-index:50;
  backdrop-filter: blur(10px);
  background: rgba(7,10,15,.72);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  padding: 12px 0;
}
.logo{ font-weight:800; letter-spacing:.02em; }
.site-nav{ display:flex; gap: 16px; align-items:center; }
.site-nav a{ color: var(--muted); }
.site-nav a:hover{ color: var(--text); }

.nav-toggle{ display:none; background:transparent; border:1px solid var(--line); border-radius: 12px; width:44px; height:44px; }
.burger{ display:block; width:18px; height:2px; background:var(--text); position:relative; margin:auto; }
.burger::before,.burger::after{ content:""; position:absolute; left:0; width:18px; height:2px; background:var(--text); }
.burger::before{ top:-6px; }
.burger::after{ top:6px; }

@media (max-width: 900px){
  .nav-toggle{ display:inline-flex; align-items:center; justify-content:center; }
  .site-nav{
    position: fixed;
    inset: 64px 16px auto 16px;
    background: rgba(7,10,15,.95);
    border:1px solid var(--line);
    border-radius: var(--radius);
    padding: 14px;
    display:none;
    flex-direction:column;
    align-items:stretch;
    box-shadow: var(--shadow);
  }
  .site-nav.is-open{ display:flex; }
  .site-nav a{ padding: 10px 12px; border-radius: 12px; }
  .site-nav a:hover{ background: rgba(255,255,255,.05); }
}

/* Hero slider */
.hero{ padding: 0; }
.hero-slider{
  position: relative;
  overflow: hidden;
  border-bottom:1px solid var(--line);
}
.slides{ position: relative; height: min(78vh, 720px); }
.slide{
  position:absolute; inset:0;
  opacity:0; transform: scale(1.02);
  transition: opacity .6s ease, transform .8s ease;
}
.slide.is-active{ opacity:1; transform: scale(1); }
.slide img{
  width:100%; height:100%;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.05);
}
.slide::after{
  content:"";
  position:absolute; inset:0;
  background: linear-gradient(
    90deg,
    rgba(7,10,15,.45) 0%,
    rgba(7,10,15,.20) 45%,
    rgba(7,10,15,.08) 100%
  );
}

.slide-overlay{
  position:absolute; inset:0;
  display:flex; flex-direction:column; justify-content:center;
  padding: clamp(20px, 4vw, 48px) 0;
  z-index: 2;
}
.eyebrow{ color: var(--muted); margin:0 0 8px; letter-spacing:.08em; text-transform: uppercase; font-size: 12px; }
.slide-overlay h1, .slide-overlay h2{
  margin:0 0 10px;
  font-size: clamp(28px, 4vw, 44px);
  line-height:1.15;
}
.lead{ margin:0 0 18px; max-width: 56ch; color: var(--muted); }
.cta-row{ display:flex; gap: 12px; flex-wrap:wrap; margin-bottom: 14px; }
.badges{ list-style:none; padding:0; margin:0; display:flex; gap:10px; flex-wrap:wrap; }
.badges li{
  border:1px solid var(--line);
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(255,255,255,.04);
  font-size: 13px;
  color: var(--muted);
}

.slider-btn{
  position:absolute; top:50%; transform: translateY(-50%);
  width:44px; height:44px;
  border-radius: 999px;
  border:1px solid var(--line);
  background: rgba(7,10,15,.65);
  color: var(--text);
  font-size: 28px;
  display:grid; place-items:center;
  cursor:pointer;
  z-index: 3;
}

/* 矢印を文字ではなくCSSで描画（文字化け対策） */
.slider-btn::before{
  content:"";
  width: 10px;
  height: 10px;
  border-right: 3px solid currentColor;
  border-bottom: 3px solid currentColor;
  display: block;
  transform: rotate(135deg); /* ← デフォは「左矢印」 */
}

/* 右矢印 */
.slider-btn.next::before{
  transform: rotate(-45deg);
}
.slider-btn.prev{ left: 12px; }
.slider-btn.next{ right: 12px; }
.slider-dots{
  position:absolute; left:50%; bottom: 14px; transform: translateX(-50%);
  display:flex; gap: 8px;
  z-index: 3;
}
.slider-dots button{
  width: 10px; height: 10px;
  border-radius: 999px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.18);
  cursor:pointer;
}
.slider-dots button.is-active{ background: var(--accent); border-color: transparent; }

/* Tiles */
.tile{
  border:1px solid var(--line);
  border-radius: var(--radius);
  overflow:hidden;
  background: rgba(255,255,255,.04);
  box-shadow: var(--shadow);
}
.tile img{ height: 180px; object-fit: cover; }
.tile h3{ margin: 14px 14px 6px; }
.tile p{ margin: 0 14px 14px; color: var(--muted); }

/* Steps */
.steps{ list-style:none; padding:0; margin:0; display:grid; gap: 14px; }
.step{
  display:grid; gap: 14px;
  grid-template-columns: 72px 1fr;
  align-items:start;
  padding: 16px;
  border:1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255,255,255,.03);
}
.step-icon{
  width:72px; height:72px;
  border-radius: 18px;
  overflow:hidden;
  border:1px solid var(--line);
  background: rgba(255,255,255,.05);
}
.step-icon img{ width:100%; height:100%; object-fit: cover; }
.step-body h3{ margin:0 0 6px; }
.step-body p{ margin:0; color: var(--muted); }
@media (max-width: 600px){
  .step{ grid-template-columns: 56px 1fr; }
  .step-icon{ width:56px; height:56px; border-radius: 14px; }
}

/* FAQ */
.faq details{
  border:1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
  background: rgba(255,255,255,.03);
}
.faq details + details{ margin-top: 12px; }
.faq summary{ cursor:pointer; font-weight:700; }
.faq p{ margin: 10px 0 0; color: var(--muted); }

/* Contact */
.contact-grid{
  display:grid; gap: 18px;
  grid-template-columns: 1.2fr .8fr;
}
@media (max-width: 900px){
  .contact-grid{ grid-template-columns: 1fr; }
}
.form{
  display:grid; gap: 12px;
  padding: 18px;
  border:1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255,255,255,.03);
}
label{ display:grid; gap: 6px; color: var(--muted); font-size: 14px; }
input, textarea{
  padding: 12px 12px;
  border-radius: 12px;
  border:1px solid var(--line);
  background: rgba(7,10,15,.55);
  color: var(--text);
  outline: none;
}
input:focus, textarea:focus{ border-color: rgba(102,217,255,.55); }
.form-note{ margin:0; color: var(--muted); font-size: 12px; }

.list{ margin: 10px 0 0; padding-left: 18px; color: var(--muted); }

/* Parallax */
.parallax{
  position: relative;
  min-height: 320px;
  display:grid;
  place-items:center;
  overflow:hidden;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.parallax::before{
  content:"";
  position:absolute;
  inset:-45%;
  background-image: var(--parallax-img);
  background-size: cover;
  background-position: center;
  transform: translateY(calc(var(--py, 0px) - 30px));
  will-change: transform;
  filter: brightness(.75) saturate(1.05);
  background-size: 100%;   /* ← 100?120%で調整 */
  background-position: center;
}
.parallax::after{
  content:"";
  position:absolute; inset:0;
  background: radial-gradient(
    60% 80% at 30% 50%,
    rgba(7,10,15,.20),
    rgba(7,10,15,.45)
  );
}

.parallax-inner{
  position:relative;
  z-index:1;
  text-align:left;
  padding: 56px 0;
}
.parallax-inner h2{ margin:0 0 8px; font-size: clamp(22px, 3vw, 34px); }
.parallax-inner p{ margin:0 0 14px; color: var(--muted); }

/* Footer */
.site-footer{ padding: 22px 0; color: var(--muted); }
.footer-inner{ display:flex; align-items:center; justify-content:space-between; gap: 12px; flex-wrap:wrap; }
.footer-links{ display:flex; gap: 14px; }
.footer-links a:hover{ color: var(--text); }

.sr-only{
  position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); border:0;
}

.card,
.tile,
.step,
.form{
  background:#ffffff;
}

.site-header{
  position: sticky;
  top:0;
  z-index:50;
  background:#ffffff;
  border-bottom:1px solid var(--line);
}

/* =========================================================
   HERO（スライダー）読みやすさ調整：最終安定版
========================================================= */

.slide-overlay,
.parallax-inner{
  text-shadow: 0 2px 10px rgba(0,0,0,.35);
}

/* スライド上の白帯（PC） */
/* 白帯は .slide-box に付ける（これで全面にならない） */
.hero .slide-box{
  display: inline-block;
  max-width: 520px;
  width: auto;
  padding: 8px 16px;
  margin-left: 96px;
  margin-top: 48px;
  margin-bottom: 48px;
  border-radius: 14px;
  background: rgba(255,255,255,.72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  box-shadow: 0 8px 20px rgba(0,0,0,.12);
}


/* 白帯内の文字 */
.hero .slide-overlay h1,
.hero .slide-overlay h2{
  margin-bottom: 6px;
  color:#111;
}
.hero .slide-overlay .lead,
.hero .slide-overlay .eyebrow,
.hero .slide-overlay .badges li{
  color:#222;
}
.hero .slide-overlay .lead{
  margin-bottom: 10px;
}

/* =========================================================
   スマホ：白帯が全面にならない＆矢印非表示
========================================================= */
@media (max-width: 600px){
  .hero .slide-overlay{
    position:absolute;
    inset:0;
    display:flex;
    justify-content:flex-start;
    padding-top: 72px;
  }

  .hero .slide-box{
    max-width: 92%;
    width: auto;
    margin: 0 auto;
    padding: 8px 12px;
    border-radius: 14px;
    background: rgba(255,255,255,.72);
  }

  .hero .slider-btn{ display:none; }
}


/* =========================================================
   パララックス：背景余白＋白帯（最終安定版）
========================================================= */

.parallax::before{
  inset: -60%;
}

.parallax-inner{
  display: inline-block;
  width: min(720px, 92%);
  padding: 18px;
  border-radius: 16px;
  background: rgba(255,255,255,.70);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  box-shadow: 0 10px 26px rgba(0,0,0,.12);
}

.parallax-inner h2{ color:#111; }
.parallax-inner p{ color:#222; }