/* =========================================================
   株式会社Atom コーポレートサイト 共通スタイル
   青基調 / 当事者株主コンセプト
   ========================================================= */
:root{
  --navy:#0a2342;
  --navy-2:#102f54;
  --navy-3:#173f6e;
  --blue:#1c6dd0;
  --blue-light:#3f8ae0;
  --blue-soft:#eaf2fc;
  --ink:#16202e;
  --muted:#586575;
  --line:#e2e7ee;
  --bg:#ffffff;
  --bg-soft:#f5f7fb;
  --bg-blue-soft:#eef3fa;
  --radius:14px;
  --shadow:0 12px 44px -14px rgba(10,35,66,.22);
  --shadow-sm:0 4px 18px -8px rgba(10,35,66,.24);
  --maxw:1120px;
  --serif:"Hiragino Mincho ProN","Yu Mincho",YuMincho,"Noto Serif JP",serif;
  --sans:"Hiragino Kaku Gothic ProN","Yu Gothic",YuGothic,"Noto Sans JP","Segoe UI",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--sans);color:var(--ink);background:var(--bg);line-height:1.85;-webkit-font-smoothing:antialiased;font-size:16px;letter-spacing:.02em}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.eyebrow{display:inline-block;font-size:12px;letter-spacing:.28em;color:var(--blue);font-weight:700;margin-bottom:18px;text-transform:uppercase}
.section-title{font-family:var(--serif);font-weight:700;font-size:clamp(26px,4vw,40px);line-height:1.4;color:var(--navy);letter-spacing:.03em}
.section-lead{color:var(--muted);font-size:16px;margin-top:18px;max-width:700px}
section{padding:96px 0}

/* ---------- Header ---------- */
header{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);transition:.3s}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px}
.brand{display:flex;align-items:center;gap:12px}
.brand img{height:40px;width:auto;object-fit:contain}
.brand-fallback{display:flex;align-items:center;gap:12px;font-family:var(--serif)}
.brand-fallback .mark{width:38px;height:38px;border-radius:9px;background:linear-gradient(135deg,var(--navy),var(--blue));color:#fff;display:grid;place-items:center;font-weight:700;font-size:20px}
.brand-fallback .name{font-size:20px;font-weight:700;color:var(--navy);letter-spacing:.06em}
.brand-fallback .name small{display:block;font-size:10px;letter-spacing:.24em;color:var(--blue);font-family:var(--sans)}
.menu{display:flex;align-items:center;gap:28px}
.menu a{font-size:14px;font-weight:600;color:var(--ink);transition:.2s}
.menu a:hover,.menu a.active{color:var(--blue)}
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--blue);color:#fff;font-weight:700;font-size:14px;padding:12px 22px;border-radius:999px;transition:.25s;box-shadow:0 6px 18px -6px rgba(28,109,208,.6);border:0;cursor:pointer}
.btn:hover{background:var(--blue-light);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--navy);border:1.5px solid var(--navy);box-shadow:none}
.btn-ghost:hover{background:var(--navy);color:#fff}
.btn-lg{padding:16px 34px;font-size:15px}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;background:none;border:0}
.hamburger span{width:24px;height:2px;background:var(--navy)}

/* ---------- Page hero (下層ページ共通バナー) ---------- */
.page-hero{position:relative;padding:148px 0 64px;background:radial-gradient(900px 400px at 85% -20%,rgba(28,109,208,.16),transparent 60%),linear-gradient(180deg,#fff 0%,var(--bg-blue-soft) 100%);overflow:hidden}
.page-hero .eyebrow{margin-bottom:14px}
.page-hero h1{font-family:var(--serif);font-weight:700;font-size:clamp(28px,4.4vw,44px);line-height:1.35;color:var(--navy);letter-spacing:.04em}
.page-hero p.lead{margin-top:20px;font-size:16px;color:var(--muted);max-width:680px}
.breadcrumb{display:flex;gap:8px;align-items:center;font-size:12.5px;color:var(--muted);margin-bottom:22px}
.breadcrumb a{color:var(--blue);font-weight:600}
.breadcrumb span{color:var(--line)}

/* ---------- Prose / content ---------- */
.prose{max-width:820px}
.prose p{font-size:15.5px;color:var(--ink);margin:0 0 20px}
.prose .muted{color:var(--muted)}
.lead-block{font-size:17px;color:var(--navy-3);font-weight:600;line-height:1.85;border-left:4px solid var(--blue);padding:6px 0 6px 24px;margin-bottom:36px}
.h2{font-family:var(--serif);font-size:clamp(22px,3vw,30px);color:var(--navy);font-weight:700;letter-spacing:.03em;margin:8px 0 24px;line-height:1.4}
.h3{font-size:20px;color:var(--navy);font-weight:700;margin:36px 0 14px}

/* feature cards (numbered) */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:36px}
.feat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px 28px;box-shadow:var(--shadow-sm);position:relative;overflow:hidden}
.feat:before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--blue)}
.feat .fn{font-family:var(--serif);font-size:13px;color:var(--blue);font-weight:700;letter-spacing:.12em}
.feat h3{font-size:18px;color:var(--navy);margin:8px 0 12px;font-weight:700;line-height:1.45}
.feat p{font-size:14px;color:var(--muted)}

/* check list */
.checklist{list-style:none;margin:18px 0 0;display:grid;gap:14px}
.checklist li{display:flex;gap:13px;align-items:flex-start;font-size:15px}
.checklist .ck{flex-shrink:0;width:24px;height:24px;border-radius:50%;background:var(--blue-soft);color:var(--blue);display:grid;place-items:center;font-weight:700;font-size:13px;margin-top:2px}
.checklist b{color:var(--navy)}

/* info table */
.info-table{width:100%;border-collapse:collapse;margin-top:10px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.info-table th,.info-table td{text-align:left;padding:18px 24px;font-size:15px;border-bottom:1px solid var(--line);vertical-align:top}
.info-table tr:last-child th,.info-table tr:last-child td{border-bottom:0}
.info-table th{background:var(--bg-blue-soft);color:var(--navy);font-weight:700;width:30%;white-space:nowrap}
.info-table td{color:var(--ink)}

/* callout */
.callout{background:var(--navy);color:#fff;border-radius:18px;padding:40px;position:relative;overflow:hidden;margin-top:44px}
.callout:after{content:"";position:absolute;inset:0;background:radial-gradient(500px 200px at 50% 0,rgba(63,138,224,.3),transparent 70%)}
.callout *{position:relative}
.callout h3{font-family:var(--serif);font-size:22px;letter-spacing:.03em;margin-bottom:10px}
.callout p{color:rgba(255,255,255,.82);font-size:14.5px}

/* figure panel */
.figure{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow-sm);margin-top:24px}
.figure img{margin:0 auto;width:100%;height:auto}
.figure figcaption{text-align:center;font-size:13px;color:var(--muted);margin-top:16px}

/* section bg helper */
.bg-soft{background:var(--bg-soft)}

/* ---------- Profile (team) ---------- */
.tcard{border:1px solid var(--line);border-radius:var(--radius);padding:40px;background:#fff;box-shadow:var(--shadow-sm)}
.tcard+.tcard{margin-top:26px}
.tcard .role{font-size:12px;color:var(--blue);font-weight:700;letter-spacing:.14em}
.tcard h2{font-family:var(--serif);font-size:26px;color:var(--navy);margin:6px 0 18px}
.tcard h2 span{font-size:14px;color:var(--muted);margin-left:12px;font-family:var(--sans)}
.tcard .pills{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
.pill{font-size:12px;background:var(--blue-soft);color:var(--navy);padding:5px 13px;border-radius:999px;font-weight:600}
.tcard h4{font-size:14px;color:var(--navy);font-weight:700;margin:22px 0 8px;letter-spacing:.04em}
.tcard p{font-size:14.5px;color:var(--muted);margin-bottom:8px}
.tcard a.link{color:var(--blue);word-break:break-all;font-size:13.5px}

/* ---------- FAQ ---------- */
.faq-list{margin-top:10px;max-width:860px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:14px;overflow:hidden}
.faq-q{padding:22px 26px;font-weight:700;color:var(--navy);font-size:15.5px;cursor:pointer;display:flex;justify-content:space-between;gap:18px;align-items:center}
.faq-q .pm{flex-shrink:0;width:22px;height:22px;color:var(--blue);font-size:20px;line-height:1;display:grid;place-items:center;transition:.3s}
.faq-item.open .pm{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease;padding:0 26px}
.faq-a p{padding-bottom:24px;font-size:14.5px;color:var(--muted)}

/* ---------- Contact form ---------- */
.form-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:50px;align-items:start}
.form-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:40px;box-shadow:var(--shadow-sm)}
.field{margin-bottom:22px}
.field label{display:block;font-size:13.5px;font-weight:700;color:var(--navy);margin-bottom:8px}
.field label .req{color:#d23b3b;font-size:12px;margin-left:6px}
.field input,.field textarea{width:100%;border:1px solid var(--line);border-radius:10px;padding:13px 16px;font-size:15px;font-family:var(--sans);background:var(--bg-soft);transition:.2s}
.field input:focus,.field textarea:focus{outline:0;border-color:var(--blue);background:#fff;box-shadow:0 0 0 3px var(--blue-soft)}
.field textarea{min-height:130px;resize:vertical}
.form-note{font-size:12.5px;color:var(--muted);margin-top:6px}
.target-card{background:var(--bg-blue-soft);border-radius:18px;padding:34px}
.target-card h3{font-family:var(--serif);font-size:20px;color:var(--navy);margin-bottom:18px}

/* ---------- CTA ---------- */
.cta{background:linear-gradient(135deg,var(--navy) 0%,var(--navy-3) 100%);color:#fff;text-align:center;position:relative;overflow:hidden}
.cta:before{content:"";position:absolute;inset:0;background:radial-gradient(700px 300px at 50% 0,rgba(63,138,224,.34),transparent 65%)}
.cta .wrap{position:relative}
.cta h2{font-family:var(--serif);font-size:clamp(26px,3.6vw,38px);line-height:1.45;letter-spacing:.04em}
.cta p{margin-top:20px;color:rgba(255,255,255,.82);font-size:16px}
.cta-actions{display:flex;gap:14px;justify-content:center;margin-top:38px;flex-wrap:wrap}
.cta .btn-ghost{color:#fff;border-color:rgba(255,255,255,.5)}
.cta .btn-ghost:hover{background:#fff;color:var(--navy)}

/* ---------- Footer ---------- */
footer{background:var(--navy);color:rgba(255,255,255,.7);padding:64px 0 30px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.12)}
.foot-brand{display:flex;align-items:center;gap:12px;font-family:var(--serif)}
.foot-brand .mark{width:38px;height:38px;border-radius:9px;background:linear-gradient(135deg,var(--blue),var(--blue-light));color:#fff;display:grid;place-items:center;font-weight:700;font-size:20px}
.foot-brand .name{font-size:20px;font-weight:700;color:#fff;letter-spacing:.06em}
.foot-brand .name small{display:block;font-size:10px;letter-spacing:.24em;color:var(--blue-light);font-family:var(--sans)}
footer p.desc{font-size:13px;margin-top:18px;max-width:330px;line-height:1.8}
.foot-col h4{color:#fff;font-size:13px;letter-spacing:.1em;margin-bottom:16px}
.foot-col a{display:block;font-size:13.5px;padding:6px 0;transition:.2s}
.foot-col a:hover{color:var(--blue-light)}
.copy{text-align:center;font-size:12px;padding-top:26px;color:rgba(255,255,255,.5)}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:.7s cubic-bezier(.16,.84,.44,1)}
.reveal.in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media(max-width:920px){
  .feat-grid{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
  .menu{display:none}
  .hamburger{display:flex}
  .header-cta{display:none}
  section{padding:72px 0}
  .page-hero{padding:120px 0 52px}
  .info-table th{width:38%}
}
@media(max-width:560px){.foot-grid{grid-template-columns:1fr}}

/* =========================================================
   ホーム(index)専用スタイル
   ========================================================= */
.hero{position:relative;padding:160px 0 90px;background:radial-gradient(1100px 520px at 80% -10%,rgba(28,109,208,.16),transparent 60%),linear-gradient(180deg,#fff 0%,var(--bg-blue-soft) 100%);overflow:hidden}
.hero:before{content:"";position:absolute;top:0;right:0;width:46%;height:100%;background:linear-gradient(160deg,rgba(10,35,66,.90) 0%,rgba(16,47,84,.86) 100%),url('hero-bg.jpg') center/cover no-repeat;clip-path:polygon(22% 0,100% 0,100% 100%,0 100%)}
.hero-grid{position:relative;display:grid;grid-template-columns:1.18fr .82fr;gap:50px;align-items:center;z-index:2}
.hero h1{font-family:var(--serif);font-weight:700;font-size:clamp(34px,5.4vw,58px);line-height:1.36;color:var(--navy);letter-spacing:.04em}
.hero h1 .hl{color:var(--blue)}
.hero .subtitle{margin-top:24px;font-size:clamp(15px,1.9vw,18px);font-weight:700;color:var(--navy-3);line-height:1.7}
.hero p.sub{margin-top:18px;font-size:16px;color:var(--muted);max-width:540px}
.hero-cta{display:flex;gap:14px;margin-top:36px;flex-wrap:wrap}
.hero-note{margin-top:20px;font-size:13px;color:var(--muted)}
.hero-note b{color:var(--blue)}
.hero-card{background:#fff;border-radius:18px;padding:34px;box-shadow:var(--shadow);border:1px solid var(--line)}
.hero-card h3{font-size:13px;color:var(--blue);letter-spacing:.16em;font-weight:700;margin-bottom:22px}
.hero-stats{display:grid;gap:22px}
.hstat{display:flex;align-items:baseline;gap:14px;padding-bottom:18px;border-bottom:1px dashed var(--line)}
.hstat:last-child{border:0;padding-bottom:0}
.hstat .num{font-family:var(--serif);font-size:34px;font-weight:700;color:var(--navy);line-height:1;white-space:nowrap}
.hstat .num small{font-size:16px;margin-left:2px}
.hstat .lbl{font-size:13px;color:var(--muted);line-height:1.5}
.hstat b{color:var(--blue)}

.trust{background:var(--navy);color:#fff;padding:34px 0}
.trust .wrap{display:flex;align-items:center;justify-content:center;gap:46px;flex-wrap:wrap;text-align:center}
.trust .item{display:flex;flex-direction:column;gap:4px}
.trust .item b{font-family:var(--serif);font-size:15px;letter-spacing:.08em;color:var(--blue-light)}
.trust .item span{font-size:12px;color:rgba(255,255,255,.7)}

.concept-head{text-align:center;max-width:760px;margin:0 auto}
.concept-head .section-lead{margin-left:auto;margin-right:auto}
.pillars{display:grid;grid-template-columns:1fr 1fr;gap:26px;margin-top:54px}
.pillar{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:40px;position:relative;overflow:hidden;box-shadow:var(--shadow-sm)}
.pillar:before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--blue)}
.pillar .pico{width:54px;height:54px;border-radius:13px;background:var(--blue-soft);color:var(--blue);display:grid;place-items:center;margin-bottom:22px}
.pillar .pico svg{width:28px;height:28px}
.pillar h3{font-family:var(--serif);font-size:21px;color:var(--navy);font-weight:700;margin-bottom:14px;line-height:1.5}
.pillar p{font-size:14.5px;color:var(--muted)}

.problem-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px;margin-top:54px}
.pcard{background:#fff;border-radius:var(--radius);padding:34px;border:1px solid var(--line);position:relative;overflow:hidden}
.pcard:before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--blue)}
.pcard .pn{font-family:var(--serif);font-size:14px;color:var(--blue);font-weight:700;letter-spacing:.1em}
.pcard h3{font-size:19px;color:var(--navy);margin:10px 0 12px;font-weight:700}
.pcard p{font-size:14.5px;color:var(--muted)}
.bridge{margin-top:50px;text-align:center;background:var(--navy);color:#fff;border-radius:18px;padding:52px 40px;position:relative;overflow:hidden}
.bridge:after{content:"";position:absolute;inset:0;background:radial-gradient(600px 200px at 50% 0,rgba(28,109,208,.32),transparent 70%)}
.bridge .eyebrow{color:var(--blue-light)}
.bridge h3{font-family:var(--serif);font-size:clamp(22px,3vw,30px);line-height:1.55;position:relative;letter-spacing:.04em}
.bridge .hl{color:var(--blue-light)}

.services-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:54px}
.scard{border:1px solid var(--line);border-radius:var(--radius);padding:36px 30px;background:#fff;transition:.3s;position:relative;overflow:hidden;display:flex;flex-direction:column}
.scard:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:transparent}
.scard .ico{width:88px;height:88px;border-radius:18px;display:grid;place-items:center;background:var(--blue-soft);margin-bottom:24px;color:var(--blue)}
.scard .ico img{width:54px;height:54px;object-fit:contain}
.scard .tag{font-size:12px;color:var(--blue);font-weight:700;letter-spacing:.14em}
.scard h3{font-family:var(--serif);font-size:20px;color:var(--navy);margin:8px 0 14px;font-weight:700;line-height:1.45}
.scard p{font-size:14.5px;color:var(--muted);flex:1}
.scard .more{margin-top:20px;font-size:13px;font-weight:700;color:var(--blue);display:inline-flex;align-items:center;gap:6px}
.scard .more:after{content:"→";transition:.2s}
.scard:hover .more:after{transform:translateX(4px)}

.str-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:54px}
.str{background:#fff;border-radius:var(--radius);padding:30px 26px;border:1px solid var(--line);box-shadow:var(--shadow-sm)}
.str .n{font-family:var(--serif);font-size:42px;font-weight:700;color:var(--blue);line-height:1}
.str h3{font-size:17px;color:var(--navy);margin:14px 0 10px;font-weight:700}
.str p{font-size:13.5px;color:var(--muted)}

.ms{background:var(--navy);color:#fff}
.ms-grid{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center}
.ms .eyebrow{color:var(--blue-light)}
.ms h2{font-family:var(--serif);font-size:clamp(24px,3.4vw,34px);line-height:1.45;letter-spacing:.04em}
.ms p{color:rgba(255,255,255,.78);margin-top:20px;font-size:15px}
.ms-points{margin-top:28px;display:grid;gap:14px}
.ms-points li{list-style:none;display:flex;gap:12px;align-items:flex-start;font-size:14.5px}
.ms-points .ck{color:var(--blue-light);font-weight:700;flex-shrink:0}
.ms-visual{background:linear-gradient(135deg,rgba(255,255,255,.08),rgba(255,255,255,.02));border:1px solid rgba(255,255,255,.14);border-radius:18px;padding:38px}
.flow-step{display:flex;gap:16px;align-items:flex-start;padding:16px 0;border-bottom:1px solid rgba(255,255,255,.1)}
.flow-step:last-child{border:0}
.flow-step .sn{width:30px;height:30px;border-radius:50%;background:var(--blue);color:#fff;display:grid;place-items:center;font-weight:700;font-size:13px;flex-shrink:0}
.flow-step b{display:block;font-size:15px;margin-bottom:3px}
.flow-step span{font-size:13px;color:rgba(255,255,255,.7)}

.team-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px;margin-top:54px}
.team-grid .tcard h3{font-family:var(--serif);font-size:24px;color:var(--navy);margin:6px 0 18px}
.team-grid .tcard h3 span{font-size:14px;color:var(--muted);margin-left:10px;font-family:var(--sans)}
.team-grid .tcard p{font-size:14px;color:var(--muted)}

@media(max-width:920px){
  .hero:before{display:none}
  .hero-grid,.ms-grid,.team-grid,.pillars{grid-template-columns:1fr}
  .services-grid{grid-template-columns:1fr}
  .str-grid{grid-template-columns:1fr 1fr}
  .problem-grid{grid-template-columns:1fr}
  .hero{padding:128px 0 70px}
}
@media(max-width:560px){.str-grid{grid-template-columns:1fr}.trust .wrap{gap:26px}}