/* ============================================================
   DESIGN SYSTEM
   ============================================================ */
:root {
  --bg:        #FFFFFF;
  --text:      #1a1a1a;
  --sub:       #666666;
  --sec-bg:    #F5F5F5;
  --card-bg:   #111111;
  --footer-bg: #1C1C1C;
  --border:    #E5E5E5;
  --red:       #e53e3e;
}

/* ============================================================
   RESET
   ============================================================ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--text);
  font-family:'Noto Sans JP',sans-serif;font-weight:400;
  line-height:1.7;overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  padding-top:64px;
}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
[id]{scroll-margin-top:72px}

/* ============================================================
   SECTION TITLE
   ============================================================ */
.section-title h2,.section-title h1{font-size:32px;font-weight:700;line-height:1.3}
.en-label{font-size:14px;font-weight:400;color:var(--sub);display:block;margin-top:4px}

/* ============================================================
   CTA COMPONENTS
   ============================================================ */
.cta-link{display:inline-flex;align-items:center;gap:16px;font-size:15px;font-weight:700;color:var(--text);transition:opacity .2s}
.cta-link:hover{opacity:.7}
.arrow-circle{width:48px;height:48px;background:#111;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0}
.arrow-circle-sm{width:36px;height:36px;background:#111;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:14px;flex-shrink:0}
.cta-link-white{display:inline-flex;align-items:center;gap:16px;font-size:15px;font-weight:700;color:#fff;transition:opacity .2s}
.cta-link-white:hover{opacity:.75}
.arrow-circle-white{width:48px;height:48px;background:#fff;color:#111;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0}
.img-ph{background:var(--border);width:100%}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn-outline{border:1.5px solid #111;background:#fff;color:#111;padding:10px 20px;border-radius:4px;font-size:14px;font-family:'Noto Sans JP',sans-serif;cursor:pointer;transition:background .2s,color .2s;display:inline-block}
.btn-outline:hover{background:#111;color:#fff}
.btn-filled{border:1.5px solid #111;background:#111;color:#fff;padding:10px 20px;border-radius:4px;font-size:14px;font-family:'Noto Sans JP',sans-serif;cursor:pointer;transition:background .2s;display:inline-block}
.btn-filled:hover{background:#333;border-color:#333}

/* ============================================================
   NAV
   ============================================================ */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;height:64px;background:#fff;border-bottom:1px solid var(--border);display:flex;align-items:center;padding:0 5vw;gap:24px}
.nav-logo{font-size:20px;font-weight:700;color:var(--text);flex-shrink:0}
.nav-links{display:flex;align-items:center;gap:28px;list-style:none;flex:1;justify-content:center}
.nav-links a{font-size:14px;color:var(--text);transition:color .2s}
.nav-links a:hover{color:#999}
.nav-btns{display:flex;align-items:center;gap:10px;flex-shrink:0}
.hamburger{display:none;flex-direction:column;justify-content:center;gap:5px;width:32px;height:32px;background:none;border:none;cursor:pointer;margin-left:auto;flex-shrink:0}
.hamburger span{display:block;height:2px;background:#111;border-radius:2px;transition:all .3s}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-menu{display:none;position:fixed;top:64px;left:0;right:0;background:#fff;border-bottom:1px solid var(--border);padding:20px 5vw 24px;z-index:99;flex-direction:column}
.mobile-menu.open{display:flex}
.mobile-menu > a{font-size:16px;font-weight:700;color:var(--text);padding:14px 0;border-bottom:1px solid var(--border);display:block}
.mobile-menu > a:last-of-type{border-bottom:none}
.mobile-btns{display:flex;gap:10px;margin-top:20px}

/* ============================================================
   PAGE HEADER
   ============================================================ */
.page-hd{background:var(--sec-bg);padding:72px 8vw 56px;border-bottom:1px solid var(--border)}
.page-hd-label{font-size:11px;color:var(--sub);letter-spacing:.15em;text-transform:uppercase;margin-bottom:14px}
.page-hd-h1{font-size:clamp(2rem,4vw,3rem);font-weight:700;line-height:1.2}
.page-hd-sub{font-size:16px;color:var(--sub);margin-top:12px;line-height:1.8}
.breadcrumb{font-size:12px;color:var(--sub);display:flex;align-items:center;gap:8px;margin-bottom:20px}
.breadcrumb a{color:var(--sub);transition:color .2s}
.breadcrumb a:hover{color:var(--text)}

/* ============================================================
   SECTION LAYOUT
   ============================================================ */
.sec{padding:80px 8vw}
.sec-gray{background:var(--sec-bg)}
.sec-dark{background:var(--card-bg);color:#fff}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:48px}
.sec-head .cta-link{font-size:14px;white-space:nowrap}

/* ============================================================
   CARDS
   ============================================================ */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.card-item{display:block;cursor:pointer;transition:opacity .2s}
.card-item:hover{opacity:.72}
.card-thumb{aspect-ratio:16/9;background:var(--border);border-radius:8px;width:100%}
.card-date{font-size:13px;color:#999;margin-top:12px}
.card-title{font-size:15px;font-weight:700;line-height:1.6;margin-top:8px}
.card-tag{display:inline-block;font-size:11px;background:var(--border);color:var(--sub);padding:2px 8px;border-radius:3px;margin-bottom:4px}

/* ============================================================
   FORM
   ============================================================ */
.form-wrap{max-width:720px;margin:0 auto}
.form-row{margin-bottom:28px}
.form-row-2{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:28px}
.form-label{display:block;font-size:14px;font-weight:700;margin-bottom:8px}
.form-label .req{color:var(--red);font-size:11px;font-weight:400;margin-left:6px;vertical-align:middle}
.form-label .opt{color:var(--sub);font-size:11px;font-weight:400;margin-left:6px}
.form-input,.form-select,.form-textarea{
  width:100%;padding:12px 16px;
  border:1px solid var(--border);border-radius:4px;
  font-family:'Noto Sans JP',sans-serif;font-size:15px;
  color:var(--text);background:#fff;
  transition:border-color .2s;-webkit-appearance:none
}
.form-input:focus,.form-select:focus,.form-textarea:focus{outline:none;border-color:#111}
.form-textarea{resize:vertical;min-height:160px}
.form-note{font-size:12px;color:var(--sub);margin-top:6px}
.form-check-label{display:flex;align-items:flex-start;gap:10px;font-size:14px;cursor:pointer}
.form-check-label input{width:18px;height:18px;flex-shrink:0;margin-top:2px;cursor:pointer;accent-color:#111}
.form-divider{border:none;border-top:1px solid var(--border);margin:36px 0}
.form-submit{
  width:100%;background:#111;color:#fff;border:none;
  padding:18px;border-radius:4px;
  font-size:16px;font-weight:700;font-family:'Noto Sans JP',sans-serif;
  cursor:pointer;transition:background .2s;margin-top:8px
}
.form-submit:hover{background:#333}
.form-submit:disabled{background:#999;cursor:not-allowed}
/* Success message */
.form-success{display:none;text-align:center;padding:60px 0}
.form-success h3{font-size:24px;font-weight:700;margin-bottom:16px}
.form-success p{color:var(--sub);line-height:1.8}

/* ============================================================
   DOWNLOAD DOCS
   ============================================================ */
.doc-list{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:48px}
.doc-card{border:1.5px solid var(--border);border-radius:8px;padding:24px;cursor:pointer;transition:border-color .2s,background .2s;position:relative}
.doc-card:hover{border-color:#111}
.doc-card.selected{border-color:#111;background:#f9f9f9}
.doc-card input{position:absolute;top:16px;right:16px;width:18px;height:18px;accent-color:#111}
.doc-icon{width:40px;height:48px;background:#1a1a1a;border-radius:4px;display:flex;align-items:center;justify-content:center;margin-bottom:16px;color:#fff;font-size:11px;font-weight:700;letter-spacing:.05em}
.doc-name{font-size:15px;font-weight:700;line-height:1.4;margin-bottom:6px}
.doc-desc{font-size:13px;color:var(--sub);line-height:1.6}

/* ============================================================
   FAQ
   ============================================================ */
.faq-list{max-width:860px;margin:0 auto}
.faq-item{border-top:1px solid var(--border)}
.faq-item:last-of-type{border-bottom:1px solid var(--border)}
.faq-question{display:flex;align-items:center;gap:16px;padding:24px 0;cursor:pointer;user-select:none}
.badge{width:28px;height:28px;background:#111;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:10px;font-weight:700;flex-shrink:0}
.badge-a{background:#fff;color:#111;border:1.5px solid #111}
.faq-q-text{font-size:16px;font-weight:700;flex:1;line-height:1.5}
.faq-toggle{font-size:13px;color:var(--sub);flex-shrink:0}
.faq-answer{display:grid;grid-template-rows:0fr;transition:grid-template-rows .35s ease-out;padding-left:44px}
.faq-answer.open{grid-template-rows:1fr}
.faq-answer-inner{overflow:hidden;display:flex;gap:16px;align-items:flex-start;padding-bottom:0;transition:padding-bottom .35s ease-out}
.faq-answer.open .faq-answer-inner{padding-bottom:24px}
.faq-a-text{font-size:15px;color:#444;line-height:1.8}

/* ============================================================
   FOOTER
   ============================================================ */
.footer{background:var(--footer-bg);color:#fff;padding:60px 8vw 40px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;margin-bottom:48px}
.footer-logo{font-size:24px;font-weight:700;color:#fff;display:block;margin-bottom:24px}
.footer-x{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border:1px solid rgba(255,255,255,.2);border-radius:6px;transition:border-color .2s}
.footer-x:hover{border-color:#fff}
.footer-nav{display:flex;flex-direction:column}
.footer-nav a{font-size:14px;color:rgba(255,255,255,.75);line-height:2.2;transition:color .2s}
.footer-nav a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:24px;text-align:center}
.footer-copy{font-size:13px;color:rgba(255,255,255,.4)}

/* ============================================================
   ANIMATION
   ============================================================ */
.anim{opacity:0;transform:translateY(30px);transition:opacity .6s ease-out,transform .6s ease-out}
.anim.in{opacity:1;transform:translateY(0)}

/* ============================================================
   PROSE (legal / long-form text)
   ============================================================ */
.prose h2{font-size:20px;font-weight:700;margin:40px 0 16px;padding-bottom:8px;border-bottom:1px solid var(--border)}
.prose h3{font-size:16px;font-weight:700;margin:28px 0 10px}
.prose p{font-size:15px;color:#444;line-height:2;margin-bottom:16px}
.prose ul{font-size:15px;color:#444;line-height:2;padding-left:24px;margin-bottom:16px}
.prose li{margin-bottom:4px}
.prose table{width:100%;border-collapse:collapse;font-size:14px;margin-bottom:24px}
.prose table th,.prose table td{padding:12px 16px;border:1px solid var(--border);text-align:left;vertical-align:top}
.prose table th{background:var(--sec-bg);font-weight:700;width:30%}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media(max-width:768px){
  .nav-links,.nav-btns{display:none}
  .hamburger{display:flex}
  .sec{padding:60px 5vw}
  .card-grid{grid-template-columns:1fr}
  .form-row-2{grid-template-columns:1fr}
  .doc-list{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-grid>div:first-child{grid-column:1/-1}
}