/* KouSen式 サイト共通スタイル */
:root{
  --navy:#274F8E; --navy-dark:#1F3F75; --ink:#1F2A44; --sub:#4A5672;
  --bg:#F4F7FB; --sky:#E6EFF6; --white:#FFFFFF;
  --red:#E04848; --yellow:#F5C243; --green:#2EA65A; --line:#D5DFEC;
  --radius:20px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:'M PLUS Rounded 1c','Noto Sans JP',sans-serif;font-size:16px;line-height:1.8;-webkit-text-size-adjust:100%}
img{max-width:100%;height:auto;display:block}
a{color:var(--navy)}
a:hover{color:var(--navy-dark)}
.container{width:100%;max-width:1080px;margin:0 auto;padding:0 20px}

/* header */
.header{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.94);backdrop-filter:saturate(1.4) blur(8px);border-bottom:1px solid var(--line)}
.header .container{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:800;font-size:20px}
.brand img{width:40px;height:40px;border-radius:10px}
.nav{display:flex;gap:4px;flex-wrap:wrap}
.nav a{text-decoration:none;color:var(--ink);font-weight:700;font-size:15px;padding:8px 12px;border-radius:999px}
.nav a:hover,.nav a[aria-current="page"]{background:var(--sky);color:var(--navy)}

/* hero */
.hero{background:var(--navy);color:var(--white);position:relative;overflow:hidden}
.hero .container{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:40px;align-items:center;padding-top:64px;padding-bottom:72px;position:relative;z-index:1}
.hero .dot{position:absolute;border-radius:50%;opacity:.16}
.hero-icon{width:96px;height:96px;border-radius:22px;box-shadow:0 10px 24px rgba(0,0,0,.25);margin-bottom:20px}
.hero h1{margin:0;font-size:52px;line-height:1.15;font-weight:800;letter-spacing:.02em}
.hero .lead{margin:16px 0 0;font-size:20px;font-weight:700}
.hero .tag{display:inline-block;margin-top:18px;background:var(--yellow);color:var(--ink);font-weight:800;padding:6px 18px;border-radius:999px}
.store-buttons{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.store-btn{display:inline-flex;align-items:center;gap:10px;min-height:52px;padding:10px 22px;border-radius:14px;background:var(--white);color:var(--ink);text-decoration:none;font-weight:800}
.store-btn small{display:block;font-size:11px;font-weight:700;color:var(--sub);line-height:1.2}
.store-btn span{line-height:1.2}
.store-btn:hover{color:var(--navy)}
.store-btn svg{flex:none}
.hero-shots{display:flex;gap:14px;justify-content:center}
.hero-shots img{width:46%;border-radius:22px;border:6px solid #fff;box-shadow:0 14px 30px rgba(0,0,0,.28)}
.hero-shots img:last-child{margin-top:48px}

/* sections */
section{padding:72px 0}
section.alt{background:var(--white)}
.sec-title{text-wrap:balance;text-align:center;margin:0 0 12px;font-size:32px;font-weight:800;color:var(--navy)}
.sec-sub{text-align:center;margin:0 auto 40px;color:var(--sub);max-width:680px}
.balls{display:flex;justify-content:center;gap:8px;margin-bottom:12px}
.balls i{width:12px;height:12px;border-radius:50%;display:block}
.balls i:nth-child(1){background:var(--red)}.balls i:nth-child(2){background:var(--yellow)}.balls i:nth-child(3){background:var(--green)}

/* message */
.message{max-width:760px;margin:0 auto;background:var(--white);border-radius:var(--radius);padding:40px 44px;border:2px solid var(--line)}
.message p{margin:0 0 14px;font-size:18px;font-weight:500}
.message p:last-child{margin-bottom:0}
.message strong{color:var(--navy)}

/* features */
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:20px}
.feature{background:var(--bg);border-radius:var(--radius);padding:28px 24px}
.feature .ico{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.feature h3{margin:0 0 8px;font-size:19px}
.feature p{margin:0;color:var(--sub);font-size:15px}

/* subjects */
.subjects{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:16px}
.subject{background:var(--white);border-radius:16px;padding:20px 22px;border-left:0;border:2px solid var(--line)}
.subject h3{margin:0 0 6px;font-size:17px;color:var(--navy)}
.subject p{margin:0;font-size:15px;color:var(--sub)}

/* shots */
.shots{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.shots img{border-radius:18px;border:1px solid var(--line)}

/* price */
.price{max-width:640px;margin:0 auto;background:var(--white);border-radius:var(--radius);padding:36px;text-align:center;border:3px solid var(--navy)}
.price .amount{font-size:44px;font-weight:800;color:var(--navy);line-height:1.2}
.price .amount small{font-size:18px}
.price .trial{display:inline-block;margin:12px 0 18px;background:var(--yellow);font-weight:800;padding:6px 18px;border-radius:999px}
.price ul{text-align:left;margin:0;padding-left:1.2em;color:var(--sub);font-size:14px}

/* doc pages */
.page-head{background:var(--navy);color:var(--white);padding:48px 0 40px}
.page-head h1{margin:0;font-size:34px}
.page-head p{margin:8px 0 0;opacity:.9}
.doc{max-width:820px;margin:0 auto;padding:48px 20px 72px}
.doc h2{font-size:22px;color:var(--navy);margin:44px 0 12px;padding-bottom:8px;border-bottom:2px solid var(--line)}
.doc h2:first-child{margin-top:0}
.doc h3{font-size:17px;margin:24px 0 6px}
.doc table{width:100%;border-collapse:collapse;margin:12px 0;font-size:15px}
.doc th,.doc td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
.doc th{background:var(--sky);width:30%}
.doc ul,.doc ol{padding-left:1.4em}
.contact-box{background:var(--white);border:2px solid var(--line);border-radius:var(--radius);padding:28px;text-align:center}
.contact-box .mail{display:inline-block;margin-top:10px;font-size:20px;font-weight:800}
.faq details{background:var(--white);border:2px solid var(--line);border-radius:16px;padding:0 20px;margin-bottom:12px}
.faq summary{cursor:pointer;font-weight:800;padding:16px 0;list-style-position:outside}
.faq details[open] summary{border-bottom:1px solid var(--line)}
.faq details > div{padding:12px 0 16px}
.faq details > div p{margin:0 0 8px}
.updated{color:var(--sub);font-size:14px;text-align:right;margin-top:40px}

/* footer */
.footer{background:var(--ink);color:#DCE3EF;padding:40px 0 28px;font-size:14px}
.footer .container{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;align-items:flex-start}
.footer a{color:#FFFFFF}
.footer ul{list-style:none;margin:0;padding:0;display:flex;gap:18px;flex-wrap:wrap}
.footer .copy{width:100%;border-top:1px solid rgba(255,255,255,.15);padding-top:18px;margin-top:8px;color:#AEB9CC}

@media (max-width:820px){
  .hero .container{grid-template-columns:minmax(0,1fr);padding-top:44px;padding-bottom:52px}
  .hero h1{font-size:40px}
  .hero-shots{max-width:420px;margin:0 auto}
  .shots{grid-template-columns:repeat(2,minmax(0,1fr))}
  section{padding:56px 0}
  .message{padding:28px 22px}
  .message p{font-size:16px}
  .sec-title{font-size:26px}
}
@media (max-width:480px){
  .hero h1{font-size:34px}
  .hero .lead{font-size:17px}
  .nav a{padding:6px 10px;font-size:14px}
}