/* =========================================================
   株式会社Cloud9 コーポレートサイト 共通スタイル
   白ベース／雲の上／淡色／洗練。見出しは明朝体。
   ========================================================= */
:root{
  --ink:#33404f;          /* 本文の濃い色（柔らかいスレート） */
  --ink-soft:#6a7689;
  --ink-faint:#9aa6b6;
  --sky:#eaf3fc;
  --sky-deep:#dcebfa;
  --lavender:#efeefa;
  --mist:#f7fafe;
  --accent:#7da9d8;
  --accent-deep:#5b86b6;
  --line:rgba(120,140,165,.16);
  --card-shadow:0 18px 50px -20px rgba(80,110,150,.28);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Zen Kaku Gothic New","Noto Sans JP",sans-serif;
  color:var(--ink);background:#fff;line-height:1.9;
  -webkit-font-smoothing:antialiased;letter-spacing:.04em;
}
img{max-width:100%;display:block}
.mincho{font-family:"Shippori Mincho","Noto Serif JP",serif}
.en{font-family:"Cormorant Garamond",serif;letter-spacing:.12em}
.wrap{max-width:1080px;margin:0 auto;padding:0 28px}
.eyebrow{font-size:.74rem;letter-spacing:.42em;color:var(--accent-deep);text-transform:uppercase;font-weight:500;margin-bottom:22px}

/* ===== ヘッダー ===== */
header{position:fixed;top:0;left:0;width:100%;z-index:50;backdrop-filter:saturate(140%) blur(10px);background:rgba(255,255,255,.66);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:76px}
.brand{display:flex;align-items:center;gap:.55em;text-decoration:none}
.brand .logo-img{height:46px;width:auto}
.brand .logo-img.hide{display:none}
.brand-text{display:none;align-items:baseline;gap:.5em}
.brand-text.show{display:inline-flex}
.brand-text .mark{font-family:"Cormorant Garamond",serif;font-size:1.6rem;letter-spacing:.06em;color:var(--ink);font-weight:500}
.brand-text .mark b{color:var(--accent-deep);font-weight:500}
.menu{display:flex;gap:38px;font-size:.82rem;color:var(--ink-soft)}
.menu a{color:inherit;text-decoration:none;transition:color .2s}
.menu a:hover{color:var(--accent-deep)}
.nav-cta{font-size:.78rem;letter-spacing:.1em;padding:11px 22px;border-radius:999px;border:1px solid var(--accent);color:var(--accent-deep);text-decoration:none;transition:.25s}
.nav-cta:hover{background:var(--accent);color:#fff}

/* ===== ボタン ===== */
.c9-btn{display:inline-flex;align-items:center;gap:.6em;font-size:.9rem;letter-spacing:.08em;padding:15px 34px;border-radius:999px;text-decoration:none;transition:.28s}
.c9-btn.primary{background:var(--accent-deep);color:#fff;box-shadow:0 14px 30px -12px rgba(91,134,182,.7)}
.c9-btn.primary:hover{background:#4d77a6;transform:translateY(-2px)}
.c9-btn.ghost{color:var(--ink);border:1px solid var(--line)}
.c9-btn.ghost:hover{border-color:var(--accent);color:var(--accent-deep)}

/* ===== ヒーロー（トップ） ===== */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;text-align:center;overflow:hidden;
  background:radial-gradient(120% 80% at 50% 8%, #fff 0%, var(--mist) 38%, var(--sky) 78%, var(--sky-deep) 100%)}
.cloud{position:absolute;border-radius:50%;background:#fff;filter:blur(42px);opacity:.85;pointer-events:none}
.cloud.c1{width:480px;height:480px;top:18%;left:-8%}
.cloud.c2{width:620px;height:620px;bottom:-22%;right:-12%;opacity:.7}
.cloud.c3{width:300px;height:300px;top:26%;right:14%;opacity:.6;background:var(--lavender);filter:blur(50px)}
.cloud.c4{width:360px;height:360px;bottom:6%;left:16%;opacity:.55;background:var(--sky);filter:blur(48px)}
.hero-inner{position:relative;z-index:2;padding:120px 24px 90px;max-width:900px}
.hero .divider{width:46px;height:1px;background:var(--accent);margin:0 auto 26px;opacity:.7}
.hero h1{font-family:"Shippori Mincho","Noto Serif JP",serif;font-weight:500;letter-spacing:.18em;line-height:1.65;color:var(--ink);
  font-size:clamp(2.3rem,6vw,4.3rem);margin:6px 0 34px;white-space:nowrap}
.hero h1 .accent{color:var(--accent-deep)}
.hero .lead{font-size:clamp(.95rem,1.7vw,1.12rem);color:var(--ink-soft);font-weight:300;line-height:2.15;max-width:640px;margin:0 auto 46px}
.btn-row{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.scroll-hint{position:absolute;bottom:30px;left:50%;transform:translateX(-50%);z-index:2;font-size:.64rem;letter-spacing:.34em;color:var(--ink-faint);writing-mode:vertical-rl}

/* ===== 共通セクション ===== */
section{padding:120px 0}
.sec-head{text-align:center;margin-bottom:64px}
.sec-head .sub-en{display:block;font-size:.72rem;letter-spacing:.4em;color:var(--accent-deep);margin-bottom:16px;text-transform:uppercase}
.sec-head h2{font-family:"Shippori Mincho","Noto Serif JP",serif;font-weight:500;font-size:clamp(1.6rem,3.4vw,2.3rem);letter-spacing:.16em;color:var(--ink)}
.sec-head p{margin-top:18px;color:var(--ink-soft);font-weight:300;font-size:.95rem}

/* ===== サービス（トップ） ===== */
.services{background:linear-gradient(180deg,#fff 0%, var(--mist) 100%)}
.cards{display:grid;grid-template-columns:repeat(2,1fr);gap:30px}
.cards-3{grid-template-columns:repeat(3,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:48px 42px;box-shadow:var(--card-shadow);transition:transform .35s, box-shadow .35s}
.card:hover{transform:translateY(-6px);box-shadow:0 28px 60px -22px rgba(80,110,150,.4)}
.card .ic{width:64px;height:64px;border-radius:18px;display:flex;align-items:center;justify-content:center;margin-bottom:26px;background:linear-gradient(135deg,var(--sky),var(--lavender))}
.card .ic svg{width:30px;height:30px;stroke:var(--accent-deep);fill:none;stroke-width:1.6}
.card .no{font-family:"Cormorant Garamond",serif;font-size:.9rem;letter-spacing:.3em;color:var(--accent);display:block;margin-bottom:8px}
.card h3{font-family:"Shippori Mincho","Noto Serif JP",serif;font-weight:500;font-size:1.3rem;letter-spacing:.08em;margin-bottom:16px;color:var(--ink)}
.card p{font-size:.92rem;color:var(--ink-soft);font-weight:300;line-height:2}
.card .more{display:inline-block;margin-top:22px;font-size:.8rem;letter-spacing:.1em;color:var(--accent-deep);text-decoration:none}
.card .more:hover{text-decoration:underline}

/* ===== 理念 ===== */
.philosophy{position:relative;overflow:hidden;text-align:center;background:radial-gradient(110% 120% at 50% 0%, var(--sky) 0%, #fff 60%)}
.philosophy .big{font-family:"Shippori Mincho","Noto Serif JP",serif;font-weight:500;font-size:clamp(1.9rem,5vw,3.3rem);letter-spacing:.2em;line-height:1.85;color:var(--ink)}
.philosophy .big b{color:var(--accent-deep);font-weight:500}
.philosophy p{max-width:640px;margin:34px auto 0;color:var(--ink-soft);font-weight:300;line-height:2.2;font-size:.96rem}

/* ===== 会社概要 ===== */
.about{background:linear-gradient(180deg,var(--mist) 0%, #fff 100%)}
.info{max-width:720px;margin:0 auto;border-top:1px solid var(--line)}
.info dl{display:grid;grid-template-columns:180px 1fr;border-bottom:1px solid var(--line);padding:22px 8px}
.info dt{font-size:.84rem;letter-spacing:.14em;color:var(--ink-soft);font-weight:500}
.info dd{font-size:.92rem;color:var(--ink);font-weight:300;line-height:1.9}
.info dd .todo{color:var(--ink-faint);font-size:.82rem}

/* ===== お問い合わせ ===== */
.contact{text-align:center;background:radial-gradient(120% 120% at 50% 120%, var(--lavender) 0%, #fff 55%)}
.contact .sub-en{display:block;font-size:.72rem;letter-spacing:.4em;color:var(--accent-deep);margin-bottom:14px;text-transform:uppercase}
.contact h2{font-family:"Shippori Mincho","Noto Serif JP",serif;font-weight:500;font-size:clamp(1.7rem,4vw,2.5rem);letter-spacing:.16em;margin-bottom:20px}
.contact p{color:var(--ink-soft);font-weight:300;margin-bottom:40px}

/* ===== お問い合わせフォーム ===== */
.contact-form{max-width:520px;margin:44px auto 0;text-align:left}
.contact-form .hp-field{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.contact-form .field{margin-bottom:22px}
.contact-form label{display:block;font-size:.82rem;letter-spacing:.08em;color:var(--ink-soft);margin-bottom:8px}
.contact-form .req{color:var(--accent-deep);font-size:.72rem;margin-left:.3em}
.contact-form input[type="text"],.contact-form input[type="email"],.contact-form textarea{
  width:100%;font:inherit;font-size:.92rem;color:var(--ink);background:#fff;
  border:1px solid var(--line);border-radius:12px;padding:13px 16px;resize:vertical;
  transition:border-color .2s;letter-spacing:.02em;
}
.contact-form input[type="text"]:focus,.contact-form input[type="email"]:focus,.contact-form textarea:focus{
  outline:none;border-color:var(--accent)
}
.contact-form button.c9-btn{border:none;cursor:pointer;width:100%;justify-content:center}
.contact-msg{display:none;max-width:520px;margin:24px auto 0;padding:14px 22px;border-radius:14px;font-size:.86rem;letter-spacing:.03em}
.contact-msg.success{background:var(--sky);color:var(--accent-deep)}
.contact-msg.error{background:#fbe9e9;color:#a8453f}
.contact-msg.show{display:block}

/* ===== フッター ===== */
footer{padding:54px 0;border-top:1px solid var(--line);background:#fff}
.foot{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px}
.foot .logo-img{height:30px;width:auto}
.foot .copy{font-size:.74rem;color:var(--ink-faint);letter-spacing:.1em}

/* ===== 下層ページ：ページヘッダー ===== */
.page-hero{position:relative;overflow:hidden;text-align:center;padding:190px 24px 110px;
  background:radial-gradient(120% 90% at 50% 0%, #fff 0%, var(--mist) 45%, var(--sky) 100%)}
.page-hero .sub-en{display:block;font-size:.74rem;letter-spacing:.42em;color:var(--accent-deep);margin-bottom:18px;text-transform:uppercase}
.page-hero h1{font-family:"Shippori Mincho","Noto Serif JP",serif;font-weight:500;font-size:clamp(2rem,5vw,3rem);letter-spacing:.2em;color:var(--ink)}
.page-hero p{margin-top:22px;color:var(--ink-soft);font-weight:300}
.c9-breadcrumb{font-size:.74rem;letter-spacing:.1em;color:var(--ink-faint);padding:22px 28px}
.c9-breadcrumb a{color:var(--ink-soft);text-decoration:none}
.c9-breadcrumb a:hover{color:var(--accent-deep)}

/* ===== 事業詳細ブロック ===== */
.svc-detail{padding:110px 0;border-bottom:1px solid var(--line)}
.svc-detail:nth-child(even){background:linear-gradient(180deg,#fff,var(--mist))}
.svc-grid{display:grid;grid-template-columns:0.8fr 1fr;gap:60px;align-items:center}
.svc-visual{aspect-ratio:4/3;border-radius:24px;background:linear-gradient(135deg,var(--sky),var(--lavender));position:relative;overflow:hidden;box-shadow:var(--card-shadow);display:flex;align-items:center;justify-content:center}
.svc-visual svg{width:96px;height:96px;stroke:#fff;fill:none;stroke-width:1.3;opacity:.9}
.svc-visual .vno{position:absolute;top:22px;left:26px;z-index:2;font-family:"Cormorant Garamond",serif;font-size:2.4rem;color:rgba(255,255,255,.95);letter-spacing:.1em;text-shadow:0 2px 12px rgba(60,90,130,.45)}
.svc-visual img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:1}
.svc-body .label{font-family:"Cormorant Garamond",serif;letter-spacing:.3em;color:var(--accent);font-size:.86rem}
.svc-body h2{font-family:"Shippori Mincho","Noto Serif JP",serif;font-weight:500;font-size:clamp(1.5rem,3vw,2rem);letter-spacing:.1em;margin:10px 0 22px;color:var(--ink)}
.svc-body p.desc{color:var(--ink-soft);font-weight:300;line-height:2.1;margin-bottom:28px}
.svc-body h4{font-size:.82rem;letter-spacing:.18em;color:var(--accent-deep);margin-bottom:14px}
.svc-body ul{list-style:none;display:flex;flex-direction:column;gap:12px}
.svc-body li{position:relative;padding-left:26px;font-size:.92rem;color:var(--ink);font-weight:300}
.svc-body li::before{content:"";position:absolute;left:0;top:.7em;width:8px;height:8px;border-radius:50%;background:var(--accent)}
.svc-detail:nth-child(even) .svc-grid{grid-template-columns:1fr 0.8fr;direction:rtl}
.svc-detail:nth-child(even) .svc-grid > *{direction:ltr}

/* ===== フェードイン ===== */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .9s ease, transform .9s ease}
.reveal.show{opacity:1;transform:none}

@media(max-width:760px){
  .menu{display:none}
  .nav-cta{display:none}
  section{padding:88px 0}
  .cards,.cards-3{grid-template-columns:1fr}
  .info dl{grid-template-columns:120px 1fr}
  .svc-grid,.svc-detail:nth-child(even) .svc-grid{grid-template-columns:1fr;direction:ltr;gap:34px}
  .page-hero{padding:150px 20px 80px}
  .hero h1{white-space:normal;letter-spacing:.12em}
}