/* ============ Reset + tokens ============ */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Noto Sans JP","Hiragino Kaku Gothic ProN","Yu Gothic UI",sans-serif;
  font-weight:400;
  color:#333;
  background:#fff;
  -webkit-font-smoothing:antialiased;
  line-height:1.75;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}

:root{
  --navy:#0D1B2A;
  --navy-2:#152B45;
  --navy-3:#1E3A5F;
  --cyan:#00BFFF;
  --cyan-2:#0077B6;
  --gold:#C9A84C;
  --text:#333333;
  --text-soft:#5A6373;
  --text-mute:#8892A3;
  --bg:#FFFFFF;
  --bg-soft:#F6F9FC;
  --bg-soft-2:#EEF3F8;
  --line:#E3EAF2;
  --radius:14px;
  --radius-lg:22px;
  --shadow-sm:0 4px 16px rgba(13,27,42,.06);
  --shadow:0 14px 40px -12px rgba(13,27,42,.18);
  --shadow-lg:0 30px 80px -20px rgba(13,27,42,.35);
  --maxw:1180px;
}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ============ Typography ============ */
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:900;color:var(--navy);letter-spacing:-0.01em}
.grad-text{
  background:linear-gradient(120deg,#00BFFF 0%,#0077B6 60%,#C9A84C 130%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.section-eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:"Inter","Noto Sans JP",sans-serif;
  font-size:13px;font-weight:600;letter-spacing:.18em;
  color:var(--cyan-2);text-transform:uppercase;
  margin-bottom:18px;
}
.section-eyebrow::before{content:"";width:28px;height:2px;background:var(--cyan)}
.section-title{font-size:clamp(28px,4vw,42px);margin-bottom:18px;text-wrap:balance}
.section-title .accent{color:var(--cyan-2)}
.section-lead{font-size:17px;color:var(--text-soft);max-width:680px;margin-bottom:56px;text-wrap:pretty}

section{padding:100px 0;position:relative}
@media (max-width:768px){section{padding:72px 0}}

/* ============ Buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  font-weight:700;font-size:15px;
  padding:14px 26px;border-radius:999px;
  transition:transform .25s ease,box-shadow .25s ease,background .25s ease,color .25s ease;
  white-space:nowrap;
}
.btn-sm{padding:10px 18px;font-size:13.5px}
.btn-line{background:#06C755;color:#fff;border:none}
.btn-line:hover{background:#05a547;color:#fff;transform:translateY(-2px)}
.btn-lg{padding:18px 32px;font-size:16px}
.btn-primary{
  background:linear-gradient(135deg,#00BFFF 0%,#0077B6 100%);
  color:#fff;
  box-shadow:0 10px 30px -10px rgba(0,119,182,.55),inset 0 1px 0 rgba(255,255,255,.25);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 40px -10px rgba(0,119,182,.65),inset 0 1px 0 rgba(255,255,255,.3)}
.btn-ghost{
  background:rgba(255,255,255,.05);color:#fff;
  border:1px solid rgba(255,255,255,.25);
  backdrop-filter:blur(6px);
}
.btn-ghost:hover{background:rgba(255,255,255,.12);transform:translateY(-2px)}
.btn-outline{
  background:transparent;color:var(--navy);
  border:1.5px solid var(--line);
}
.btn-outline:hover{border-color:var(--navy);transform:translateY(-2px)}

/* ============ Header ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(13,27,42,.85);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(255,255,255,.06);
  transition:background .3s ease, border-color .3s ease;
}
.site-header.scrolled{background:rgba(255,255,255,.92);border-bottom-color:var(--line)}
.site-header.scrolled .site-nav a:not(.btn){color:var(--navy)}
.site-header.scrolled .logo-name{color:var(--navy)}
.site-header.scrolled .logo-sub{color:var(--text-mute);border-left-color:var(--line)}
.site-header.scrolled .nav-toggle span{background:var(--navy)}

.header-inner{display:flex;align-items:center;justify-content:space-between;height:74px}
.logo{display:flex;align-items:center;gap:12px}
.logo-mark{display:inline-flex}
.logo-text{display:flex;flex-direction:column;line-height:1.1}
.logo-name{font-family:"Inter","Noto Sans JP",sans-serif;font-weight:800;color:#fff;font-size:17px;letter-spacing:-.01em;transition:color .3s}
.logo-sub{font-size:10.5px;color:rgba(255,255,255,.55);letter-spacing:.05em;transition:color .3s;padding-left:12px;border-left:1px solid rgba(255,255,255,.2)}
.header-logo{height:36px;width:auto;display:block}
.header-logo--dark{display:none}
.site-header.scrolled .header-logo--light{display:none}
.site-header.scrolled .header-logo--dark{display:block}

.site-nav{display:flex;align-items:center;gap:30px}
.site-nav a:not(.btn){color:rgba(255,255,255,.85);font-size:14px;font-weight:500;position:relative;transition:color .2s}
.site-nav a:not(.btn):hover{color:var(--cyan)}
.site-nav a:not(.btn)::after{content:"";position:absolute;left:0;bottom:-6px;height:2px;width:0;background:var(--cyan);transition:width .25s ease}
.site-nav a:not(.btn):hover::after{width:100%}

.nav-toggle{display:none;flex-direction:column;gap:5px;padding:8px}
.nav-toggle span{display:block;width:24px;height:2px;background:#fff;border-radius:2px;transition:transform .3s,opacity .3s,background .3s}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

@media (max-width:920px){
  .nav-toggle{display:flex}
  .site-nav{
    position:absolute;top:74px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:#0D1B2A;
    padding:20px 24px 32px;
    transform:translateY(-130%);transition:transform .35s ease;
    border-bottom:1px solid rgba(255,255,255,.08);
  }
  .site-nav.open{transform:translateY(0)}
  .site-nav a:not(.btn){padding:16px 0;border-bottom:1px solid rgba(255,255,255,.06);color:#fff}
  .nav-cta{margin-top:16px;justify-content:center}
  .site-nav .nav-line{
    display:flex;width:100%;margin-top:8px;
    background:#06C755;color:#fff;
    border-radius:999px;padding:14px 18px;
    justify-content:center;align-items:center;gap:8px;
    font-size:14px;font-weight:700;
    border:none;
  }
  .site-header.scrolled .site-nav{background:#fff}
  .site-header.scrolled .site-nav a:not(.btn){border-color:var(--line)}
}

/* ============ Hero ============ */
.hero{
  background:linear-gradient(160deg,#0D1B2A 0%,#152B45 60%,#1E3A5F 100%);
  color:#fff;
  padding:160px 0 110px;
  overflow:hidden;
  position:relative;
}
.hero-bg{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.hero-glow{position:absolute;border-radius:50%;filter:blur(80px);opacity:.5}
.glow-1{width:520px;height:520px;background:radial-gradient(circle,#00BFFF 0%,transparent 70%);top:-100px;right:-120px}
.glow-2{width:420px;height:420px;background:radial-gradient(circle,#C9A84C 0%,transparent 70%);bottom:-150px;left:-100px;opacity:.25}
.hero-grid{
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(0,191,255,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(0,191,255,.06) 1px,transparent 1px);
  background-size:60px 60px;
  mask-image:radial-gradient(ellipse 80% 60% at 50% 40%,#000 30%,transparent 80%);
}

.hero-inner{position:relative;display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:center}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  padding:8px 14px;border-radius:999px;
  background:rgba(0,191,255,.1);border:1px solid rgba(0,191,255,.25);
  font-size:13px;color:#7DD8FF;font-weight:500;margin-bottom:24px;
}
.hero-eyebrow .dot{width:6px;height:6px;border-radius:50%;background:#00BFFF;box-shadow:0 0 12px #00BFFF;animation:pulse 2s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.6;transform:scale(1.2)}}

.hero-title{
  font-size:clamp(34px,5vw,60px);
  font-weight:900;color:#fff;line-height:1.2;
  margin-bottom:24px;letter-spacing:-.02em;
}
.hero-sub{
  font-size:16px;color:rgba(255,255,255,.78);
  max-width:560px;margin-bottom:36px;line-height:1.85;
}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:48px}
.hero-trust{display:flex;align-items:center;gap:24px;flex-wrap:wrap}
.trust-item{display:flex;flex-direction:column}
.trust-item strong{font-family:"Inter",sans-serif;font-size:24px;font-weight:800;color:#fff;line-height:1}
.trust-item span{font-size:12px;color:rgba(255,255,255,.55);margin-top:6px}
.trust-divider{width:1px;height:32px;background:rgba(255,255,255,.15)}

.hero-visual{position:relative;height:480px}
.card-stack{position:absolute;inset:0}
.floating-card{
  position:absolute;
  background:rgba(255,255,255,.97);
  color:var(--navy);
  border-radius:18px;
  padding:20px;
  box-shadow:0 30px 80px -20px rgba(0,0,0,.5);
  border:1px solid rgba(255,255,255,.4);
  animation:float 6s ease-in-out infinite;
}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
.card-1{top:20px;left:0;width:240px;animation-delay:0s}
.card-2{top:140px;right:0;width:260px;animation-delay:1.5s}
.card-3{bottom:0;left:60px;width:280px;animation-delay:3s}

.fc-label{font-size:11px;font-weight:700;color:var(--text-mute);letter-spacing:.1em;text-transform:uppercase;margin-bottom:12px}
.fc-line{height:7px;background:linear-gradient(90deg,#E3EAF2,#F6F9FC);border-radius:4px;margin-bottom:6px}
.fc-line.short{width:55%}
.fc-tag{display:inline-block;font-size:11px;padding:4px 10px;border-radius:999px;background:#E5F6FF;color:#0077B6;font-weight:600}

/* Card1: チャット */
.fc-chat{display:flex;flex-direction:column;gap:10px;margin-bottom:12px}
.fc-chat-user{font-size:12px;font-weight:600;color:var(--navy);background:#F0F4F9;padding:8px 12px;border-radius:12px 12px 12px 4px}
.fc-chat-ai{background:#F6F9FC;padding:10px 12px;border-radius:4px 12px 12px 12px;border:1px solid var(--line)}
.fc-chat-footer{display:flex;align-items:center;justify-content:space-between}
.fc-time{font-size:11px;color:var(--text-mute)}

/* Card2: Before/After */
.fc-compare{display:flex;flex-direction:column;gap:10px;margin-bottom:12px}
.fc-compare-row{display:flex;align-items:center;gap:8px}
.fc-compare-label{width:36px;font-size:11px;font-weight:700;color:var(--text-mute);flex-shrink:0}
.fc-bar-wrap{flex:1;height:10px;background:#F0F4F9;border-radius:999px;overflow:hidden}
.fc-bar{height:100%;border-radius:999px}
.fc-bar-before{width:100%;background:#CBD5E1}
.fc-bar-after{width:20%;background:linear-gradient(90deg,#00BFFF,#0077B6);box-shadow:0 0 8px rgba(0,191,255,.4)}
.fc-compare-val{font-size:12px;font-weight:700;width:28px;text-align:right;flex-shrink:0}
.fc-compare-val.mute{color:var(--text-mute)}
.fc-compare-val.accent{color:#0077B6}
.fc-reduction{font-size:12px;color:var(--text-soft)}
.fc-reduction strong{color:#0077B6;font-size:15px;margin-right:4px}

/* Card3: KPIダッシュボード */
.fc-kpi-list{display:flex;flex-direction:column;gap:10px}
.fc-kpi-row{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--text-soft);padding-bottom:8px;border-bottom:1px solid var(--line)}
.fc-kpi-row:last-child{border-bottom:none;padding-bottom:0}
.fc-kpi-val{font-weight:700;color:var(--navy);font-size:13px}
.fc-mini-bar-wrap{display:flex;align-items:center;gap:8px}
.fc-mini-bar{width:64px;height:7px;border-radius:999px;background:#E3EAF2;overflow:hidden}
.fc-mini-bar::before{content:"";display:block;width:78%;height:100%;background:linear-gradient(90deg,#00BFFF,#0077B6);border-radius:999px;box-shadow:0 0 8px rgba(0,191,255,.4)}

.hero-scroll{position:absolute;bottom:24px;left:50%;transform:translateX(-50%);display:flex;flex-direction:column;align-items:center;gap:8px;font-size:10px;letter-spacing:.3em;color:rgba(255,255,255,.4)}
.scroll-line{width:1px;height:36px;background:linear-gradient(180deg,rgba(255,255,255,.4),transparent);animation:scrollPulse 2s ease-in-out infinite}
@keyframes scrollPulse{0%,100%{opacity:.4;transform:scaleY(1)}50%{opacity:1;transform:scaleY(1.3)}}

@media (max-width:920px){
  .hero{padding:130px 0 80px}
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .hero-visual{height:360px;margin-top:20px}
  .card-1{width:200px}
  .card-2{width:220px}
  .card-3{width:240px;left:20px}
  .hero-scroll{display:none}
}

/* ============ Scroll reveal ============ */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .8s ease,transform .8s ease}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.1s}
.reveal.d2{transition-delay:.2s}
.reveal.d3{transition-delay:.3s}
.reveal.d4{transition-delay:.4s}