/* ============================================
   /service/ai/  —  AIワークイノベーション
   「点のサービス」を「AI導入の1本の線」に再編した版
============================================ */
:root {
  --aiw-bg:     #f4f7fc;
  --aiw-navy:   #0f2547;
  --aiw-blue:   #1d4ed8;
  --aiw-ink:    #1a2236;
  --aiw-gray:   #4b5563;
  --aiw-line:   #e3e8f0;
  --aiw-white:  #ffffff;

  /* ステップ別アクセント（旧タグ色を継承） */
  --s1: #2563eb; /* 試す  */
  --s2: #d97706; /* 育てる */
  --s3: #059669; /* 採る  */
  --s4: #dc2626; /* 動かす */

  --aiw-radius: 18px;
  --aiw-shadow: 0 10px 34px rgba(15,37,71,.10);
}

*,*::before,*::after{box-sizing:border-box}
.ai-page-wrap{overflow-x:hidden;background:var(--aiw-bg);color:var(--aiw-ink);
  font-family:'Noto Sans JP',system-ui,sans-serif;line-height:1.8;-webkit-font-smoothing:antialiased}
.ai-page-wrap a{color:inherit;text-decoration:none}
.ai-page-wrap img{max-width:100%;height:auto;display:block}

.fade-in{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.fade-in.visible{opacity:1;transform:translateY(0)}

.ai-container{max-width:1100px;margin:0 auto;padding:0 28px}

/* ============================================
   共通 section head
============================================ */
.ai-sec-head{text-align:center;max-width:720px;margin:0 auto 48px}
.ai-sec-eyebrow{display:inline-block;font-family:'Oswald',sans-serif;
  font-size:12px;font-weight:600;letter-spacing:.22em;text-transform:uppercase;
  color:var(--aiw-blue);margin-bottom:12px}
.ai-sec-title{font-size:clamp(22px,3.4vw,34px);font-weight:900;
  letter-spacing:-.02em;line-height:1.35;color:var(--aiw-navy);margin-bottom:14px}
.ai-sec-lead{font-size:15px;line-height:1.95;color:var(--aiw-gray)}

/* ============================================
   HERO — ワーク主軸・明るいネイビー
============================================ */
.ai-hero{position:relative;overflow:hidden;
  padding:118px 24px 104px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,#0b1f44 0%,#143062 40%,#1d4ed8 100%)}
.ai-hero::before{content:'';position:absolute;inset:0;
  background:
    radial-gradient(ellipse 55% 65% at 18% 30%, rgba(96,165,250,.30) 0%, transparent 55%),
    radial-gradient(ellipse 45% 55% at 85% 70%, rgba(14,165,233,.22) 0%, transparent 55%)}
.ai-hero::after{content:'';position:absolute;inset:0;
  background-image:
    repeating-linear-gradient(0deg,rgba(255,255,255,.018) 0 1px,transparent 1px 42px),
    repeating-linear-gradient(90deg,rgba(255,255,255,.018) 0 1px,transparent 1px 42px)}
.ai-hero-inner{position:relative;z-index:1;text-align:center;max-width:860px}
.ai-hero-eyebrow{display:inline-block;font-family:'Oswald',sans-serif;
  font-size:12px;font-weight:600;letter-spacing:.28em;text-transform:uppercase;
  color:rgba(186,214,253,.85);margin-bottom:20px}
.ai-hero h1{font-size:clamp(28px,5vw,52px);font-weight:900;color:#fff;
  line-height:1.28;letter-spacing:-.03em;margin-bottom:24px}
.ai-hero h1 .h1-accent{color:#bae6fd}
.ai-hero-lead{font-size:clamp(14px,1.7vw,16px);line-height:2.05;
  color:rgba(255,255,255,.80);max-width:660px;margin:0 auto 38px}

/* HEROのステップ予告（小さな線） */
.ai-hero-steps{display:flex;align-items:center;justify-content:center;
  gap:6px;flex-wrap:wrap}
.ai-hero-step{display:inline-flex;align-items:center;gap:7px;
  padding:9px 16px;border-radius:999px;font-size:13px;font-weight:700;color:#fff;
  border:1.5px solid rgba(255,255,255,.28);background:rgba(255,255,255,.08);
  backdrop-filter:blur(4px)}
.ai-hero-step b{font-family:'Oswald',sans-serif;font-weight:700;opacity:.8}
.ai-hero-step-arrow{color:rgba(255,255,255,.5);font-size:14px}

/* ============================================
   STEP LINE — 導入の4ステップ（点→線）
============================================ */
#ai-flow{padding:84px 0 88px}
.aiw-flow{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
/* 4つの番号をつなぐ「線」 */
.aiw-flow::before{content:'';position:absolute;top:23px;left:11%;right:11%;height:2px;
  background:linear-gradient(90deg,var(--s1),var(--s2),var(--s3),var(--s4));
  z-index:0;border-radius:2px}

.aiw-step{position:relative;z-index:1;display:flex;flex-direction:column}
.aiw-step.s1{color:var(--s1)}
.aiw-step.s2{color:var(--s2)}
.aiw-step.s3{color:var(--s3)}
.aiw-step.s4{color:var(--s4)}

.aiw-step-num{width:46px;height:46px;border-radius:50%;margin:0 auto 18px;
  background:#fff;border:2px solid currentColor;color:currentColor;
  display:flex;align-items:center;justify-content:center;
  font-family:'Oswald',sans-serif;font-size:20px;font-weight:700;
  box-shadow:0 4px 14px rgba(15,37,71,.10)}

.aiw-step-card{flex:1;display:flex;flex-direction:column;
  background:var(--aiw-white);border:1px solid var(--aiw-line);
  border-top:4px solid currentColor;border-radius:var(--aiw-radius);
  padding:22px 22px 20px;transition:transform .25s,box-shadow .25s}
.aiw-step-card:hover{transform:translateY(-5px);box-shadow:var(--aiw-shadow)}

.aiw-step-stage{display:inline-flex;align-items:center;gap:8px;
  font-size:11px;font-weight:800;letter-spacing:.06em;color:currentColor;margin-bottom:12px}
.aiw-step-stage .st-no{font-family:'Oswald',sans-serif;font-size:12px;letter-spacing:.1em}
.aiw-step-stage .st-bar{width:14px;height:1.5px;background:currentColor;opacity:.5}
.aiw-step-card h3{font-size:16px;font-weight:900;color:var(--aiw-navy);
  line-height:1.5;margin-bottom:10px}
.aiw-step-card p{font-size:13.5px;line-height:1.85;color:var(--aiw-gray);flex:1;margin-bottom:16px}
.aiw-step-link{display:inline-flex;align-items:center;gap:5px;
  font-size:13px;font-weight:800;color:currentColor;align-self:flex-start;
  border-bottom:1.5px solid transparent;transition:border-color .2s}
.aiw-step-card:hover .aiw-step-link{border-color:currentColor}

/* ============================================
   個人向け QUINSEL
============================================ */
#ai-quinsel{padding:0 0 88px}
.aiw-quinsel{display:grid;grid-template-columns:1.1fr 1.4fr;
  border-radius:22px;overflow:hidden;
  background:linear-gradient(135deg,#1e1b4b 0%,#312e81 55%,#4f46e5 100%);
  border:1px solid rgba(99,102,241,.3);
  transition:transform .25s,border-color .25s}
.aiw-quinsel:hover{transform:translateY(-4px);border-color:rgba(99,102,241,.6)}
.aiw-quinsel-visual{padding:44px 36px;display:flex;flex-direction:column;justify-content:center;
  border-right:1px solid rgba(99,102,241,.22)}
.aiw-quinsel-eyebrow{font-family:'Oswald',sans-serif;font-size:12px;font-weight:600;
  letter-spacing:.2em;text-transform:uppercase;color:#a5b4fc;margin-bottom:14px}
.aiw-quinsel-name{font-size:38px;font-weight:900;color:#fff;letter-spacing:.03em;line-height:1;margin-bottom:12px}
.aiw-quinsel-tag{display:inline-block;align-self:flex-start;padding:5px 13px;border-radius:999px;
  background:rgba(99,102,241,.22);border:1px solid rgba(99,102,241,.4);
  font-size:11px;font-weight:700;color:#c7d2fe;letter-spacing:.08em}
.aiw-quinsel-body{padding:44px 38px;display:flex;flex-direction:column;justify-content:center}
.aiw-quinsel-body h3{font-size:18px;font-weight:900;color:#fff;line-height:1.55;margin-bottom:12px}
.aiw-quinsel-body p{font-size:14px;line-height:1.9;color:rgba(255,255,255,.7);margin-bottom:22px}
.aiw-quinsel-btn{display:inline-flex;align-items:center;gap:7px;align-self:flex-start;
  padding:12px 24px;border-radius:999px;background:#4f46e5;border:1.5px solid rgba(99,102,241,.45);
  color:#fff;font-size:13px;font-weight:800;transition:background .2s,transform .2s}
.aiw-quinsel:hover .aiw-quinsel-btn{background:#4338ca;transform:translateY(-2px)}

/* ============================================
   AIライフ領域（SONORY / ONE SONG）— 圧縮ストリップ
============================================ */
#ai-life{padding:0 0 88px}
.aiw-life{border-radius:22px;overflow:hidden;
  background:linear-gradient(150deg,#1a0612 0%,#3d0f26 50%,#5c1535 100%);
  border:1px solid rgba(200,98,122,.28);
  padding:38px 44px;
  display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:28px}
.aiw-life-mark{width:52px;height:52px;border-radius:14px;flex-shrink:0;
  background:linear-gradient(135deg,#9d174d,#C8627A);
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:22px;font-weight:900;box-shadow:0 4px 16px rgba(200,98,122,.4)}
.aiw-life-text{min-width:0}
.aiw-life-eyebrow{font-family:'Oswald',sans-serif;font-size:11px;font-weight:600;
  letter-spacing:.2em;text-transform:uppercase;color:#e8a3b5;margin-bottom:6px}
.aiw-life-text h3{font-size:20px;font-weight:900;color:#fff;line-height:1.4;margin-bottom:8px}
.aiw-life-text p{font-size:13.5px;line-height:1.8;color:rgba(255,255,255,.68)}
.aiw-life-links{display:flex;flex-direction:column;gap:10px;flex-shrink:0}
.aiw-life-link{display:inline-flex;align-items:center;justify-content:space-between;gap:14px;
  padding:13px 18px;border-radius:12px;min-width:236px;
  background:rgba(255,255,255,.09);border:1px solid rgba(200,98,122,.4);
  color:#fff;font-weight:800;transition:background .2s,border-color .2s,transform .2s}
.aiw-life-link:hover{background:rgba(200,98,122,.26);border-color:rgba(200,98,122,.7);transform:translateX(3px)}
.aiw-life-link .ll-main{font-size:15px;letter-spacing:.02em;color:#fff}
.aiw-life-link .ll-main em{font-style:normal;font-size:11px;font-weight:600;color:#f3c5d1;margin-left:4px}
.aiw-life-link small{display:block;font-size:11.5px;font-weight:500;color:rgba(255,255,255,.78);margin-top:3px}
.aiw-life-link .ll-go{color:#f3c5d1;font-weight:800;font-size:16px;flex-shrink:0}
/* ONE SONG をフィーチャー */
.aiw-life-link.featured{background:rgba(200,98,122,.22);border-color:rgba(200,98,122,.6);
  box-shadow:0 4px 18px rgba(200,98,122,.22)}
.aiw-life-link.featured:hover{background:rgba(200,98,122,.34)}

/* ============================================
   CTA
============================================ */
#ai-cta{padding:0 0 96px}
.aiw-cta{border-radius:24px;text-align:center;padding:56px 40px;
  background:linear-gradient(135deg,#0b1f44 0%,#1d4ed8 120%);position:relative;overflow:hidden}
.aiw-cta::before{content:'';position:absolute;inset:0;
  background:radial-gradient(ellipse 60% 80% at 50% 0%,rgba(96,165,250,.25),transparent 60%)}
.aiw-cta-inner{position:relative;z-index:1}
.aiw-cta h2{font-size:clamp(20px,3vw,30px);font-weight:900;color:#fff;line-height:1.45;margin-bottom:14px}
.aiw-cta p{font-size:14.5px;line-height:1.9;color:rgba(255,255,255,.78);max-width:560px;margin:0 auto 28px}
.aiw-cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;align-items:center}
.aiw-cta .aiw-cta-btn{display:inline-flex;align-items:center;gap:8px;
  padding:15px 34px;border-radius:999px;background:#fff;color:var(--aiw-navy);
  font-size:14px;font-weight:800;transition:transform .2s,box-shadow .2s}
.aiw-cta .aiw-cta-btn:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(0,0,0,.25)}
.aiw-cta .aiw-cta-link{font-size:13.5px;font-weight:800;color:#fff;
  border-bottom:1.5px solid rgba(255,255,255,.7);transition:border-color .2s}
.aiw-cta .aiw-cta-link:hover{border-color:#fff}

/* ============================================
   Accessibility
============================================ */
.aiw-step-card,.aiw-quinsel,.aiw-life-link,.aiw-cta-btn,.aiw-quinsel-btn{min-height:44px}
.aiw-step-card:focus-visible,.aiw-quinsel:focus-visible,.aiw-life-link:focus-visible,.aiw-cta-btn:focus-visible{
  outline:3px solid rgba(29,78,216,.85);outline-offset:4px}

/* ============================================
   レスポンシブ
============================================ */
@media(max-width:880px){
  .aiw-quinsel{grid-template-columns:1fr}
  .aiw-quinsel-visual{border-right:none;border-bottom:1px solid rgba(99,102,241,.22)}
  .aiw-life{grid-template-columns:auto 1fr;gap:20px}
  .aiw-life-links{grid-column:1 / -1;flex-direction:row;flex-wrap:wrap}
  .aiw-life-link{min-width:0;flex:1}
}
@media(max-width:820px){
  /* 4ステップを縦並びの線に */
  .aiw-flow{grid-template-columns:1fr;gap:0}
  .aiw-flow::before{display:none}
  .aiw-step{flex-direction:row;gap:18px;padding-bottom:26px}
  .aiw-step:not(:last-child){position:relative}
  .aiw-step:not(:last-child)::after{content:'';position:absolute;
    left:22px;top:46px;bottom:0;width:2px;background:currentColor;opacity:.35}
  .aiw-step-num{margin:0;flex-shrink:0}
  .aiw-step-card{border-top:1px solid var(--aiw-line);border-left:4px solid currentColor}
}
@media(max-width:560px){
  .ai-container{padding:0 18px}
  .ai-hero{padding:96px 20px 80px}
  .aiw-life{padding:28px 22px}
  .aiw-quinsel-visual,.aiw-quinsel-body{padding:30px 24px}
  .aiw-cta{padding:44px 24px}
}

@media (prefers-reduced-motion: reduce){
  .ai-page-wrap *,.ai-page-wrap *::before,.ai-page-wrap *::after{
    animation-duration:.001ms !important;animation-iteration-count:1 !important;
    transition-duration:.001ms !important;scroll-behavior:auto !important}
  .ai-page-wrap .fade-in,.ai-page-wrap .fade-in.visible{opacity:1 !important;transform:none !important}
}