/* ============================================================
   MIKADUKI duki.jp Redesign Prototype v2
   真实品牌色版：藍系グラデ × 月牙白 × 活力イエロー
   参考: 提供 Figma 稿（弧線モチーフ／実写Hero／logo解構）
         cover-corp.com（余白・英文大標・マーキー）
         metoh.jp（企業信頼感）
   Brand colors (from mikaduki logo):
     深藍 #05237F ／ 藍 #004298 ／ 明藍 #0062B7 ／ 黄 #FFDB00
   ============================================================ */
:root{
  --b900:#05237F;
  --b700:#004298;
  --b500:#0062B7;
  --b100:#E9F1F9;
  --b050:#F4F8FC;
  --yellow:#FFDB00;
  --ink:#1A1A1A;
  --paper:#FFFFFF;
  --line:rgba(5,35,127,.12);
  --serif:"Shippori Mincho","Hiragino Mincho ProN",serif;
  --sans:"Noto Sans JP","Hiragino Kaku Gothic ProN",sans-serif;
  --en:"Cormorant Garamond","Times New Roman",serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);color:var(--ink);background:var(--paper);
  line-height:2;font-weight:400;font-size:15px;
  -webkit-font-smoothing:antialiased;letter-spacing:.02em;overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.container{max-width:1120px;margin:0 auto;padding:0 24px;position:relative}
.narrow{max-width:800px}

/* ---------- Scroll progress ---------- */
.scroll-progress{position:fixed;top:0;left:0;height:3px;width:0;z-index:200;
  background:linear-gradient(90deg,var(--yellow),#FFC400)}

/* ---------- Header ---------- */
.site-header{
  position:fixed;inset:0 0 auto 0;z-index:100;
  background:rgba(255,255,255,.9);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.site-header .inner{
  max-width:1240px;margin:0 auto;padding:0 28px;height:72px;
  display:flex;align-items:center;justify-content:space-between;
}
.logo-img{height:30px;width:auto}
.gnav{display:flex;align-items:center;gap:32px}
.gnav a{
  font-size:12.5px;letter-spacing:.14em;color:var(--b900);
  padding:6px 0;position:relative;font-weight:500;
}
.gnav a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--yellow);transition:width .35s;
}
.gnav a:hover::after,.gnav a.active::after{width:100%}
.gnav .cta{border:1px solid var(--b900);padding:8px 22px;border-radius:2px;transition:.3s}
.gnav .cta:hover{background:var(--b900);color:#fff}
.gnav .cta::after{display:none}
.menu-btn{display:none}

/* ---------- Logo-derived decorations ---------- */
/* 弧線モチーフ（Figma 稿の同心弧） */
.arcs{position:absolute;pointer-events:none;z-index:0;will-change:transform}
.arcs.right{right:-220px;top:-120px;width:640px;height:640px;opacity:.9}
.arcs.left{left:-260px;bottom:-200px;width:560px;height:560px;opacity:.7}
/* logo解構アイコン ●)) */
.mk-icon{display:inline-flex;align-items:center;gap:0;height:22px;margin-bottom:14px}

/* ---------- Hero (index) ---------- */
.hero{
  position:relative;min-height:100vh;display:flex;align-items:center;overflow:hidden;
  background:linear-gradient(135deg,#05237F 0%,#004298 48%,#0062B7 100%);
  color:#fff;
}
.hero .hero-arcs{position:absolute;right:-16vw;top:50%;transform:translateY(-50%);
  width:70vw;max-width:900px;height:auto;opacity:.85;animation:heroDrift 14s ease-in-out infinite alternate}
@keyframes heroDrift{from{transform:translateY(-52%) rotate(-2deg)}to{transform:translateY(-48%) rotate(2deg)}}
.hero .inner{position:relative;z-index:2;width:100%;max-width:1240px;margin:0 auto;padding:130px 28px 90px}
.hero h1{
  font-family:var(--serif);font-weight:600;
  font-size:clamp(28px,4vw,50px);letter-spacing:.12em;line-height:1.9;
}
.hero h1 .line{display:block;overflow:hidden}
.hero h1 .line span{display:inline-block;transform:translateY(110%);animation:riseUp 1s cubic-bezier(.22,.8,.3,1) forwards}
.hero h1 .line:nth-child(2) span{animation-delay:.18s}
@keyframes riseUp{to{transform:none}}
.hero .sub{
  margin-top:30px;font-size:clamp(13px,1.3vw,17px);letter-spacing:.3em;
  font-family:var(--serif);color:#fff;opacity:0;animation:fadeSub 1s .7s forwards;
  display:inline-block;position:relative;padding-bottom:10px;
}
.hero .sub::after{content:"";position:absolute;left:0;bottom:0;height:3px;width:0;
  background:var(--yellow);animation:underGrow .9s 1.1s cubic-bezier(.22,.8,.3,1) forwards}
@keyframes fadeSub{to{opacity:1}}
@keyframes underGrow{to{width:100%}}
.hero .photo-note{position:absolute;right:28px;bottom:88px;z-index:2;font-size:10.5px;
  letter-spacing:.18em;color:rgba(255,255,255,.55)}
.scroll-hint{
  position:absolute;left:50%;bottom:24px;transform:translateX(-50%);
  z-index:2;font-family:var(--en);font-size:11px;letter-spacing:.35em;
  color:rgba(255,255,255,.75);text-align:center;
}
.scroll-hint::after{
  content:"";display:block;width:1px;height:44px;margin:10px auto 0;
  background:linear-gradient(var(--yellow),transparent);animation:drip 2s infinite;
}
@keyframes drip{0%{transform:scaleY(0);transform-origin:top}
  50%{transform:scaleY(1);transform-origin:top}
  51%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}

/* ---------- Marquee ---------- */
.marquee{overflow:hidden;white-space:nowrap;border-block:1px solid var(--line);
  background:#fff;padding:16px 0}
.marquee.dark{background:var(--b900);border:none}
.marquee-track{display:inline-flex;gap:64px;padding-right:64px;
  animation:mq 28s linear infinite;will-change:transform}
.marquee:hover .marquee-track{animation-play-state:paused}
.marquee span{font-family:var(--en);font-size:20px;letter-spacing:.24em;color:var(--b700)}
.marquee.dark span{color:rgba(255,255,255,.85)}
.marquee span b{color:var(--yellow);font-weight:600}
@keyframes mq{to{transform:translateX(-50%)}}

/* ---------- Sections ---------- */
section{padding:110px 0;position:relative;overflow:hidden}
.sec-head{margin-bottom:56px;position:relative;z-index:1}
.sec-head .en{
  font-family:var(--en);font-size:clamp(30px,3.6vw,46px);color:var(--b900);
  letter-spacing:.1em;line-height:1.1;
}
.sec-head .ja{
  margin-top:8px;font-size:13.5px;letter-spacing:.28em;color:var(--b500);
  font-weight:700;
}
.sec-head.center{text-align:center}
.sec-head .bar{width:56px;height:3px;background:var(--yellow);margin-top:22px}
.sec-head.center .bar{margin-left:auto;margin-right:auto}
.sec-head.center .mk-icon{justify-content:center;display:flex}
.lead{max-width:760px;font-size:15px;line-height:2.3;position:relative;z-index:1}
.lead.center{margin:0 auto;text-align:center}
.bg-soft{background:var(--b050)}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:14px;
  font-family:var(--en);font-size:13px;letter-spacing:.22em;color:var(--b900);
  border:1px solid var(--b900);padding:14px 34px;border-radius:2px;
  position:relative;overflow:hidden;transition:color .35s;z-index:1;background:#fff;
}
.btn::before{
  content:"";position:absolute;inset:0;background:var(--b900);
  transform:scaleX(0);transform-origin:right;transition:transform .35s;z-index:-1;
}
.btn:hover{color:#fff}
.btn:hover::before{transform:scaleX(1);transform-origin:left}
.btn.light{color:#fff;border-color:#fff;background:transparent}
.btn.light::before{background:var(--yellow)}
.btn.light:hover{color:var(--b900);border-color:var(--yellow)}

/* ---------- Brand strip ---------- */
.brands{border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.brand-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:1px;background:var(--line)}
.brand-cell{background:#fff;padding:38px 26px;transition:.35s;position:relative;top:0}
.brand-cell:hover{background:var(--b050);top:-4px;box-shadow:0 14px 30px rgba(5,35,127,.10)}
.brand-cell .bname{font-family:var(--en);font-size:17px;letter-spacing:.06em;
  color:var(--b900);font-weight:600;line-height:1.4}
.brand-cell .bjp{font-size:12px;color:var(--b500);letter-spacing:.1em;margin-top:2px}
.brand-cell p{font-size:12px;line-height:1.9;margin-top:12px;color:#555}
.brand-cell::after{content:"";position:absolute;left:26px;bottom:24px;width:22px;height:3px;
  background:var(--yellow);transition:width .35s}
.brand-cell:hover::after{width:48px}

/* ---------- Service cards ---------- */
.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.svc{background:#fff;border:1px solid var(--line);border-radius:4px;
  padding:36px 32px 42px;position:relative;transition:.35s;top:0;z-index:1}
.svc:hover{top:-6px;box-shadow:0 18px 40px rgba(5,35,127,.12);border-color:transparent}
.svc .num{font-family:var(--en);font-size:56px;line-height:1;
  color:transparent;-webkit-text-stroke:1.5px var(--b500);transition:.35s}
.svc:hover .num{color:var(--yellow);-webkit-text-stroke:1.5px var(--yellow)}
.svc h3{font-family:var(--serif);font-size:19px;letter-spacing:.12em;color:var(--b900);
  margin:18px 0 14px;font-weight:600}
.svc p{font-size:13.5px;line-height:2.1;color:#444;min-height:150px}
.svc .btn{margin-top:24px;padding:11px 26px;font-size:11px}

/* ---------- Numbers ---------- */
.numbers{background:linear-gradient(120deg,var(--b900),var(--b700));color:#fff}
.numbers::before{content:"";position:absolute;inset:0;opacity:.12;
  background:repeating-linear-gradient(115deg,transparent 0 26px,#fff 26px 27px);
  animation:stripeMove 22s linear infinite}
@keyframes stripeMove{to{background-position:520px 0}}
.num-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:30px;position:relative;z-index:1}
.num-cell{text-align:center;padding:10px 6px;border-right:1px solid rgba(255,255,255,.16)}
.num-cell:last-child{border-right:none}
.num-cell .label{font-size:12px;letter-spacing:.16em;color:rgba(255,255,255,.8)}
.num-cell .val{font-family:var(--en);font-size:clamp(30px,3.4vw,46px);color:var(--yellow);
  line-height:1.25;margin:10px 0 4px;font-weight:600}
.num-cell .unit{font-size:12.5px;letter-spacing:.1em}

/* ---------- History ---------- */
.timeline{position:relative;margin-top:20px;padding-left:22px;z-index:1}
.timeline::before{content:"";position:absolute;left:5px;top:6px;bottom:6px;width:2px;
  background:linear-gradient(var(--yellow),var(--b100))}
.tl-item{position:relative;padding:0 0 30px 26px}
.tl-item::before{content:"";position:absolute;left:-22px;top:12px;width:11px;height:11px;
  border-radius:50%;background:#fff;border:3px solid var(--b500);transition:.3s}
.tl-item:hover::before{background:var(--yellow);border-color:var(--b900);transform:scale(1.25)}
.tl-item .year{font-family:var(--en);font-size:22px;color:var(--b900);letter-spacing:.06em;font-weight:600}
.tl-item p{font-size:13.5px;color:#444;margin-top:2px}

/* ---------- Generic blocks ---------- */
.block{background:#fff;border:1px solid var(--line);border-radius:4px;
  padding:44px 46px;margin-bottom:28px;position:relative;z-index:1;transition:.35s;top:0}
.block:hover{box-shadow:0 14px 34px rgba(5,35,127,.09);top:-3px}
.block h3{font-family:var(--serif);font-size:20px;color:var(--b900);letter-spacing:.1em;
  margin-bottom:6px;font-weight:600}
.block .sub-en{font-family:var(--en);font-size:12px;letter-spacing:.24em;color:var(--b500)}
.block p{font-size:14px;line-height:2.2;color:#3d3d3d;margin-top:14px}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.tag{font-size:11.5px;border:1px solid var(--line);border-radius:999px;
  padding:4px 14px;color:var(--b900);background:var(--b050);transition:.3s}
.tag:hover{background:var(--yellow);border-color:var(--yellow)}
.feature-list{margin-top:18px;display:grid;gap:14px}
.feature-list li{position:relative;padding-left:24px;font-size:13.8px;line-height:2}
.feature-list li::before{content:"";position:absolute;left:0;top:10px;width:12px;height:12px;
  border-radius:50%;background:var(--b500);
  box-shadow:5px 0 0 -3px var(--b700),9px 0 0 -5px var(--yellow)}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.three-col{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}

/* ---------- Tabs ---------- */
.tabs{display:flex;border-bottom:1px solid var(--line);margin-bottom:44px}
.tab-btn{flex:1;text-align:center;padding:18px 10px;cursor:pointer;background:none;border:none;
  font-family:var(--sans);font-size:13.5px;letter-spacing:.16em;color:#888;
  border-bottom:3px solid transparent;transition:.3s}
.tab-btn .ten{display:block;font-family:var(--en);font-size:11px;letter-spacing:.3em;margin-bottom:4px}
.tab-btn:hover{color:var(--b700)}
.tab-btn.active{color:var(--b900);border-bottom-color:var(--yellow)}
.tab-panel{display:none}
.tab-panel.active{display:block;animation:fadein .5s}
@keyframes fadein{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}

/* ---------- Sub-page hero ---------- */
.subhero{
  position:relative;padding:170px 0 96px;color:#fff;overflow:hidden;
  background:linear-gradient(135deg,#05237F 0%,#004298 55%,#0062B7 100%);
}
.subhero .arcs{right:-180px;top:-160px;width:560px;height:560px;opacity:.8}
.subhero .en{font-family:var(--en);font-size:clamp(34px,5vw,58px);letter-spacing:.12em;line-height:1.2}
.subhero .ja{margin-top:10px;font-family:var(--serif);font-size:16px;letter-spacing:.3em;color:var(--yellow)}
.breadcrumb{margin-top:26px;font-size:11px;letter-spacing:.12em;color:rgba(255,255,255,.6)}

/* ---------- Table ---------- */
.def-table{width:100%;border-collapse:collapse;background:#fff;position:relative;z-index:1}
.def-table th,.def-table td{border:1px solid var(--line);padding:18px 24px;font-size:14px;
  text-align:left;vertical-align:top;line-height:2}
.def-table th{width:220px;background:var(--b050);font-family:var(--serif);
  color:var(--b900);letter-spacing:.14em;font-weight:600}

/* ---------- CTA ---------- */
.cta-band{background:linear-gradient(120deg,var(--b900) 0%,var(--b700) 100%);
  color:#fff;text-align:center;position:relative;overflow:hidden}
.cta-band .arcs{left:-200px;bottom:-260px;width:520px;height:520px;opacity:.5}
.cta-band h2{font-family:var(--serif);font-size:clamp(20px,2.6vw,28px);letter-spacing:.2em;font-weight:600}
.cta-band p{margin:18px 0 34px;font-size:13.5px;letter-spacing:.12em;color:rgba(255,255,255,.85)}

/* ---------- Footer ---------- */
.site-footer{background:var(--b900);color:rgba(255,255,255,.88);padding:70px 0 34px}
.foot-grid{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap}
.foot-logo-img{height:34px;width:auto}
.foot-addr{margin-top:20px;font-size:12.5px;line-height:2.2;color:rgba(255,255,255,.65)}
.foot-nav{display:flex;gap:36px;font-size:12px;letter-spacing:.16em}
.foot-nav a{position:relative}
.foot-nav a:hover{color:var(--yellow)}
.copyright{margin-top:54px;padding-top:22px;border-top:1px solid rgba(255,255,255,.14);
  font-size:11px;letter-spacing:.1em;color:rgba(255,255,255,.5);text-align:center}

/* ---------- Brand guide page ---------- */
.swatch-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative;z-index:1}
.swatch{border-radius:4px;overflow:hidden;border:1px solid var(--line)}
.swatch .chip{height:110px}
.swatch .meta{padding:14px 16px;font-size:12px;line-height:1.9;background:#fff}
.swatch .meta b{font-family:var(--en);font-size:14px;letter-spacing:.06em;color:var(--b900)}
.logo-stage{background:#fff;border:1px solid var(--line);border-radius:4px;
  display:flex;align-items:center;justify-content:center;padding:56px 30px}
.logo-stage.dark{background:linear-gradient(120deg,var(--b900),var(--b700))}
.logo-stage img{max-height:150px;width:auto}
.rule-list li{font-size:13.5px;padding-left:22px;position:relative;margin-bottom:10px}
.rule-list li::before{content:"";position:absolute;left:0;top:11px;width:8px;height:8px;background:var(--yellow)}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s ease,transform .8s ease}
.reveal.on{opacity:1;transform:none}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;
    transition-duration:.01ms!important}
  .hero h1 .line span{transform:none}
  .hero .sub{opacity:1}
}

/* ---------- Responsive ---------- */
@media(max-width:960px){
  .brand-grid{grid-template-columns:repeat(2,1fr)}
  .service-grid{grid-template-columns:1fr}
  .svc p{min-height:0}
  .num-grid{grid-template-columns:repeat(2,1fr);gap:8px}
  .num-cell{border-right:none;border-bottom:1px solid rgba(255,255,255,.16);padding:20px 6px}
  .two-col,.three-col,.swatch-grid{grid-template-columns:1fr}
  .gnav{display:none}
  .menu-btn{display:block;background:none;border:none;color:var(--b900);
    font-family:var(--en);letter-spacing:.2em;font-size:12px;cursor:pointer}
  .gnav.open{display:flex;position:fixed;inset:72px 0 auto 0;background:#fff;
    flex-direction:column;padding:30px;gap:22px;border-bottom:1px solid var(--line)}
  section{padding:72px 0}
  .block{padding:30px 24px}
  .def-table th{width:120px;padding:12px}
  .def-table td{padding:12px 16px}
  .hero .hero-arcs{right:-40vw;width:120vw;opacity:.5}
}