/* ==========================================================
   Spring Official Website v1.0
   style.css
   Spring Brand Site（Version1.1）の余白・色・タイポグラフィ・
   アニメーション・静けさをそのまま継承しています。
   トークン（:root）とコンポーネント（nav / hero / talk / card /
   promise / final / footer）はBrand Siteと同一のものを使用し、
   このサイトに必要な要素（実績・会社概要・4カラムの事業カード）
   のみを新規追加しています。
   ========================================================== */

:root{
  --white:       #FAF9F5;
  --white-soft:  #F2F0E9;
  --ink:         #1A1A16;
  --ink-soft:    #5C5C52;
  --ink-faint:   #9A9A8E;
  --green:       #3E6B4F;
  --green-deep:  #2C4E39;
  --green-tint:  #E4EAE1;
  --line:        rgba(26,26,22,0.10);

  --serif-en:  'Cormorant Garamond', serif;
  --serif-jp:  'Shippori Mincho', serif;
  --sans-jp:   'Noto Sans JP', sans-serif;
  --label:     'Zen Kaku Gothic New', sans-serif;

  --ease: cubic-bezier(0.19,1,0.22,1);
  --breath: 6s;
}

*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  background:var(--white);
  color:var(--ink);
  font-family:var(--sans-jp);
  font-weight:300;
  line-height:1.9;
  letter-spacing:0.02em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

::selection{background:var(--green-tint); color:var(--green-deep);}

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

/* ---------- film grain overlay ---------- */
.grain{
  position:fixed; inset:0; z-index:200; pointer-events:none;
  opacity:0.035; mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

/* ---------- layout helpers ---------- */
.wrap{
  max-width:1180px; margin:0 auto; padding:0 64px;
}
section{position:relative;}

.eyebrow{
  font-family:var(--label);
  font-size:12px;
  letter-spacing:0.32em;
  text-transform:uppercase;
  color:var(--ink-faint);
}

.reveal{opacity:0; transform:translateY(28px); transition:opacity 1.4s var(--ease), transform 1.4s var(--ease);}
.reveal.in-view{opacity:1; transform:translateY(0);}
.reveal.d1{transition-delay:0.12s;}
.reveal.d2{transition-delay:0.24s;}
.reveal.d3{transition-delay:0.36s;}
.reveal.d4{transition-delay:0.48s;}
.reveal.d5{transition-delay:0.60s;}

/* ---------- nav ---------- */
nav{
  position:fixed; top:0; left:0; right:0; z-index:100;
  display:flex; align-items:center; justify-content:space-between;
  padding:32px 64px;
  mix-blend-mode:difference;
}
nav .logo{
  font-family:var(--serif-en); font-weight:400; font-size:22px;
  letter-spacing:0.06em; color:var(--white);
}
nav .navlink{
  font-family:var(--label); font-size:12px; letter-spacing:0.28em;
  text-transform:uppercase; color:var(--white); opacity:0.85;
  border-bottom:1px solid rgba(255,255,255,0.35);
  padding-bottom:4px;
}

/* ---------- hero ---------- */
.hero{
  min-height:108svh;
  display:flex; flex-direction:column; justify-content:center;
  padding:260px 80px 220px;
  position:relative;
  background:
    radial-gradient(ellipse 60% 50% at 78% 22%, rgba(62,107,79,0.06), transparent 60%),
    radial-gradient(ellipse 70% 60% at 20% 85%, rgba(26,26,22,0.03), transparent 60%),
    var(--white);
}
.hero-inner{max-width:760px;}
.hero .eyebrow{margin-bottom:28px;}
.hero .word{
  font-family:var(--serif-en); font-weight:400; font-style:normal;
  font-size:clamp(108px,15.5vw,240px);
  line-height:0.86; letter-spacing:-0.015em;
  color:var(--ink);
  margin-bottom:64px;
}
.hero .tagline{
  font-family:var(--serif-jp); font-weight:500;
  font-size:clamp(22px,2.6vw,30px);
  color:var(--ink);
  margin-bottom:60px;
  letter-spacing:0.04em;
}
.hero .sub{
  font-family:var(--sans-jp); font-weight:300;
  font-size:clamp(15px,1.4vw,17px);
  color:var(--ink-soft);
  max-width:420px;
  margin-bottom:56px;
}
.hero .sub br{display:block; content:"";}
.hero .explain{
  font-family:var(--sans-jp); font-weight:300;
  font-size:clamp(14px,1.3vw,16px);
  color:var(--ink-soft);
  max-width:460px;
  line-height:2;
  letter-spacing:0.02em;
  padding-left:20px;
  border-left:1px solid var(--line);
}
.hero .explain br{display:block; content:"";}

/* ---------- talk : living CTA ---------- */
.talk{
  display:inline-flex; align-items:center; gap:20px;
  cursor:pointer; position:relative; background:none; border:none;
  -webkit-tap-highlight-color:transparent;
}
.talk .seed-wrap{
  width:44px; height:44px; position:relative;
  display:flex; align-items:center; justify-content:center;
}
.talk .halo{
  position:absolute; inset:0; border-radius:50%;
  background:radial-gradient(circle, rgba(62,107,79,0.28), transparent 70%);
  animation:halo-breathe 5.5s ease-in-out infinite;
}
@keyframes halo-breathe{
  0%,100%{opacity:0.35; transform:scale(0.85);}
  50%{opacity:0.9; transform:scale(1.2);}
}
.talk svg{width:100%; height:100%; overflow:visible;}
.talk .dot{fill:var(--green); transition:transform 0.9s var(--ease);}
.talk .stem,.talk .leaf-l,.talk .leaf-r{
  fill:none; stroke:var(--green); stroke-width:1.3; stroke-linecap:round; stroke-linejoin:round;
  stroke-dasharray:50; stroke-dashoffset:50;
  transition:stroke-dashoffset 0.9s var(--ease);
}
.talk:hover .stem,.talk:focus-visible .stem{stroke-dashoffset:0;}
.talk:hover .leaf-l,.talk:focus-visible .leaf-l{stroke-dashoffset:0; transition-delay:0.32s;}
.talk:hover .leaf-r,.talk:focus-visible .leaf-r{stroke-dashoffset:0; transition-delay:0.46s;}
.talk:hover .dot,.talk:focus-visible .dot{transform:translateY(-15px);}
.talk .label-wrap{position:relative; overflow:hidden;}
.talk .label{
  display:block;
  font-family:var(--label); font-size:13px; letter-spacing:0.22em;
  text-transform:uppercase; color:var(--ink);
  transition:letter-spacing 0.9s var(--ease), color 0.9s var(--ease);
}
.talk .label-under{
  position:absolute; left:0; bottom:-10px; width:100%; height:1px; background:var(--green);
  transform:scaleX(0.12); transform-origin:center;
  transition:transform 0.9s var(--ease);
}
.talk:hover .label,.talk:focus-visible .label{letter-spacing:0.34em; color:var(--green-deep);}
.talk:hover .label-under,.talk:focus-visible .label-under{transform:scaleX(1);}
.talk .whisper{
  font-family:var(--serif-jp); font-size:12px; color:var(--ink-faint);
  max-width:0; opacity:0; white-space:nowrap; overflow:hidden;
  transition:max-width 0.9s var(--ease) 0.15s, opacity 0.6s var(--ease) 0.2s;
}
.talk:hover .whisper,.talk:focus-visible .whisper{max-width:220px; opacity:1;}

/* sprout signature svg */
.sprout{
  position:absolute; right:8%; top:50%; transform:translateY(-50%);
  width:min(30vw,360px);
  opacity:0.9;
}
.sprout path{
  fill:none; stroke:var(--green); stroke-width:1.4;
  stroke-linecap:round; stroke-dasharray:600; stroke-dashoffset:600;
  animation:draw 2.6s var(--ease) 0.4s forwards;
}
.sprout .leaf{stroke-dasharray:260; stroke-dashoffset:260; animation-delay:1.6s; animation-duration:1.8s;}
@keyframes draw{to{stroke-dashoffset:0;}}
.sprout-wrap{animation:sway 8s ease-in-out infinite;}
@keyframes sway{0%,100%{transform:rotate(0deg);}50%{transform:rotate(1.2deg);}}

.scroll-cue{
  position:absolute; bottom:48px; left:64px;
  font-family:var(--label); font-size:11px; letter-spacing:0.3em;
  text-transform:uppercase; color:var(--ink-faint);
  display:flex; align-items:center; gap:12px;
}
.scroll-cue .line{width:1px; height:36px; background:var(--ink-faint); position:relative; overflow:hidden;}
.scroll-cue .line::after{
  content:""; position:absolute; top:-100%; left:0; width:100%; height:100%;
  background:var(--green);
  animation:drip 2.4s ease-in-out infinite;
}
@keyframes drip{0%{top:-100%;}100%{top:100%;}}

/* ---------- philosophy : 「Springとは」 ---------- */
.philosophy{
  padding:220px 64px;
  background:var(--white-soft);
  display:flex; justify-content:center;
  position:relative;
  overflow:hidden;
}
.philosophy::before{
  content:"";
  position:absolute; inset:0;
  background:
    radial-gradient(ellipse 50% 70% at 90% 0%, rgba(62,107,79,0.05), transparent 60%);
}
.philosophy-inner{max-width:760px; text-align:left; position:relative;}
.philosophy .statement{
  font-family:var(--serif-jp); font-weight:600;
  font-size:clamp(28px,3.6vw,46px);
  line-height:1.7;
  color:var(--ink);
  margin:28px 0 48px;
  letter-spacing:0.02em;
}
.philosophy .statement .fade{color:var(--ink-faint);}
.philosophy .body-text{
  font-size:16px; color:var(--ink-soft); max-width:480px;
  font-weight:300;
}
.philosophy .body-text p{margin-bottom:1.6em;}
.philosophy .body-text p:last-child{margin-bottom:0;}

/* ---------- choose : 「事業内容」 ---------- */
.choose{
  padding:200px 64px 160px;
  background:var(--white);
}
.choose-head{max-width:640px; margin:0 auto 100px; text-align:center;}
.choose-head h2{
  font-family:var(--serif-jp); font-weight:600;
  font-size:clamp(26px,3.2vw,38px);
  margin-top:20px; letter-spacing:0.02em; line-height:1.6;
}
.cards{
  display:grid; grid-template-columns:repeat(3,1fr); gap:1px;
  background:var(--line);
  border:1px solid var(--line);
  max-width:1180px; margin:0 auto;
}
.service-cards{grid-template-columns:repeat(4,1fr);}
.card{
  background:var(--white);
  padding:56px 40px;
  min-height:300px;
  display:flex; flex-direction:column; justify-content:space-between;
  transition:background 0.8s var(--ease), transform 0.8s var(--ease), box-shadow 0.8s var(--ease);
}
.choose .card{cursor:default;}
.card:hover{
  background:var(--white-soft);
  transform:translateY(-6px);
  box-shadow:0 28px 56px -36px rgba(26,26,22,0.22);
}
.card .num{
  font-family:var(--serif-en); font-size:14px; color:var(--ink-faint); letter-spacing:0.1em;
  transition:color 0.7s var(--ease);
}
.card:hover .num{color:var(--green);}
.card .mark{
  width:34px; height:34px; margin:36px 0 28px;
}
.card .mark svg{width:100%; height:100%; overflow:visible;}
.card .mark path{
  fill:none; stroke:var(--green); stroke-width:1.3; stroke-linecap:round;
  stroke-dasharray:130; stroke-dashoffset:130;
  transition:stroke-dashoffset 1.1s var(--ease);
}
.card:hover .mark path{stroke-dashoffset:0;}
.card h3{
  font-family:var(--serif-jp); font-weight:600; font-size:21px;
  margin-bottom:16px; letter-spacing:0.05em;
}
.card p{font-size:14px; color:var(--ink-soft); font-weight:300; line-height:1.85;}
.services-note{
  text-align:center; margin:64px auto 0; max-width:1180px;
  font-family:var(--serif-jp); font-size:16px; color:var(--ink-soft);
  letter-spacing:0.03em;
}

/* ---------- stats : 「実績」 ---------- */
.stats{
  padding:200px 64px;
  background:var(--white);
  text-align:center;
}
.stats-grid{
  display:grid; grid-template-columns:repeat(3,1fr);
  max-width:900px; margin:0 auto;
}
.stat{padding:0 40px; border-left:1px solid var(--line);}
.stat:first-child{border-left:none;}
.stat-num{
  font-family:var(--serif-en); font-weight:300;
  font-size:clamp(48px,6vw,84px); line-height:1;
  color:var(--ink);
}
.stat-suffix{
  font-family:var(--sans-jp); font-weight:300; font-size:16px;
  color:var(--ink-soft); margin-left:4px;
}
.stat-label{
  font-family:var(--label); font-size:12px; letter-spacing:0.24em;
  text-transform:uppercase; color:var(--ink-faint);
  margin-top:24px;
}

/* ---------- company : 「会社概要」 ---------- */
.company{
  padding:200px 64px;
  background:var(--white-soft);
}
.company-inner{max-width:640px; margin:0 auto;}
.company-list{display:flex; flex-direction:column;}
.company-row{
  display:flex; gap:40px; align-items:baseline;
  padding:32px 0;
  border-top:1px solid var(--line);
}
.company-row:last-child{border-bottom:1px solid var(--line);}
.company-row dt{
  width:150px; flex-shrink:0;
  font-family:var(--label); font-size:12px; letter-spacing:0.2em;
  text-transform:uppercase; color:var(--ink-faint);
}
.company-row dd{
  font-family:var(--sans-jp); font-weight:300; font-size:16px;
  color:var(--ink); line-height:1.9;
}

/* ---------- promise : 「私たちについて／Springの約束」 ---------- */
.promise{
  padding:220px 64px;
  background:var(--ink);
  color:var(--white);
}
.promise-inner{max-width:760px; margin:0 auto;}
.promise .eyebrow{color:rgba(250,249,245,0.5);}
.promise h2{
  font-family:var(--serif-jp); font-weight:600;
  font-size:clamp(28px,3.4vw,40px);
  margin:24px 0 80px; letter-spacing:0.02em;
}
.vows{display:flex; flex-direction:column;}
.vow{
  display:flex; align-items:baseline; gap:28px;
  padding:32px 0;
  border-top:1px solid rgba(250,249,245,0.14);
}
.vow:last-child{border-bottom:1px solid rgba(250,249,245,0.14);}
.vow .dot{width:6px; height:6px; border-radius:50%; background:var(--green); flex-shrink:0;}
.vow p{
  font-family:var(--serif-jp); font-weight:500; font-size:clamp(18px,2vw,22px);
  letter-spacing:0.03em; color:rgba(250,249,245,0.92);
}

/* ---------- final : 話してみるCTA ---------- */
.final{
  min-height:100svh;
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  text-align:center;
  padding:160px 64px;
  background:var(--white);
  position:relative;
  overflow:hidden;
}
.final::before{
  content:"";
  position:absolute; left:50%; top:50%; transform:translate(-50%,-50%);
  width:900px; height:900px; border-radius:50%;
  background:radial-gradient(circle, rgba(62,107,79,0.06), transparent 65%);
}
.final .statement{
  font-family:var(--serif-jp); font-weight:600;
  font-size:clamp(24px,3vw,34px);
  line-height:1.8; margin:24px 0 56px; letter-spacing:0.02em;
  position:relative;
}
.final-sprout{width:120px; margin:0 auto 40px; position:relative;}
.final-sprout path{fill:none; stroke:var(--green); stroke-width:1.4; stroke-linecap:round;}

/* ---------- footer ---------- */
footer{
  padding:56px 64px;
  display:flex; justify-content:space-between; align-items:center;
  border-top:1px solid var(--line);
  font-family:var(--label); font-size:11px; letter-spacing:0.18em;
  color:var(--ink-faint);
}

/* ---------- responsive ---------- */
@media (max-width:960px){
  .wrap,.hero,.philosophy,.choose,.stats,.company,.promise,.final,nav,footer{padding-left:28px; padding-right:28px;}
  nav{padding-top:24px; padding-bottom:24px;}
  .hero{padding-top:140px; padding-bottom:100px;}
  .hero .sub{max-width:100%;}
  .sprout{display:none;}
  .cards{grid-template-columns:1fr;}
  .service-cards{grid-template-columns:repeat(2,1fr);}
  .card{min-height:auto; padding:44px 32px;}
  .philosophy{padding:140px 28px;}
  .choose{padding:140px 28px 100px;}
  .choose-head{margin-bottom:64px;}
  .stats{padding:140px 28px;}
  .stats-grid{grid-template-columns:1fr; gap:56px;}
  .stat{border-left:none; padding:0;}
  .company{padding:140px 28px;}
  .company-row{flex-direction:column; gap:8px;}
  .company-row dt{width:auto;}
  .promise{padding:140px 28px;}
  .promise h2{margin-bottom:56px;}
  .final{padding:120px 28px;}
  .talk{gap:16px;}
  .talk .seed-wrap{width:38px; height:38px;}
  .talk .whisper{display:none;}
}

@media (max-width:560px){
  .service-cards{grid-template-columns:1fr;}
}