/* Blue Ocean55 LLC — corporate site
   目的：海外メーカーが送信元ドメインを見に来たときに「実在する会社」と伝わること */

:root{
  --ink:        #101f2c;
  --ink-soft:   #33475a;
  --muted:      #6b7c8a;
  --ground:     #ffffff;
  --ground-alt: #f6f4f0;
  --band:       #0f2537;
  --accent:     #14507a;
  --rule:       #e4dfd6;
  --rule-dark:  #2b4358;
  --wrap:       1080px;
}

*,*::before,*::after{ box-sizing:border-box; }

img{ max-width:100%; height:auto; }

html{ scroll-behavior:smooth; -webkit-text-size-adjust:100%; }

body{
  margin:0;
  background:var(--ground);
  color:var(--ink);
  font-family:"Noto Sans JP",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.9;
  font-feature-settings:"palt" 1;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3{
  font-family:"Noto Serif JP",Georgia,"Times New Roman",serif;
  font-weight:600;
  line-height:1.4;
  letter-spacing:.02em;
  margin:0;
}

a{ color:var(--accent); text-decoration:none; }
a:hover{ text-decoration:underline; }

.wrap{ max-width:var(--wrap); margin:0 auto; padding:0 28px; }

/* ---------- header ---------- */

.site-header{
  position:sticky; top:0; z-index:50;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid var(--rule);
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  gap:24px; min-height:72px;
}
.brand{ display:flex; flex-direction:column; gap:2px; color:var(--ink); }
.brand:hover{ text-decoration:none; }
.brand-mark{
  font-family:"Noto Serif JP",Georgia,serif;
  font-size:16px; font-weight:600; letter-spacing:.16em;
}
.brand-num{ color:var(--accent); }
.brand-sub{ font-size:11px; color:var(--muted); letter-spacing:.08em; line-height:1; }

.site-nav{ display:flex; align-items:center; gap:26px; }
.site-nav a{
  font-size:13.5px; color:var(--ink-soft); letter-spacing:.04em; white-space:nowrap;
}
.site-nav a:hover{ color:var(--accent); text-decoration:none; }
.site-nav .lang{
  border:1px solid var(--rule); border-radius:2px;
  padding:5px 12px; font-size:12px; letter-spacing:.12em; color:var(--ink);
}
.site-nav .lang:hover{ border-color:var(--accent); color:var(--accent); }

/* ---------- hero ---------- */

.hero{ padding:104px 0 88px; border-bottom:1px solid var(--rule); }
.hero h1{ font-size:clamp(1.9rem,4.6vw,3rem); letter-spacing:.04em; }
.hero .lede{
  margin:22px 0 0;
  font-family:"Noto Serif JP",Georgia,serif;
  font-size:clamp(1.05rem,2.2vw,1.35rem);
  color:var(--accent); letter-spacing:.06em; line-height:1.7;
}
.hero .rule{ width:56px; height:2px; background:var(--accent); margin:34px 0 30px; }
.hero-body{ margin:0; max-width:640px; color:var(--ink-soft); }

/* ---------- sections ---------- */

section{ scroll-margin-top:80px; }
.section{ padding:88px 0; border-bottom:1px solid var(--rule); }
.section--alt{ background:var(--ground-alt); }

.eyebrow{
  font-size:11px; letter-spacing:.24em; text-transform:uppercase;
  color:var(--muted); margin:0 0 14px;
}
.section h2{ font-size:clamp(1.3rem,2.8vw,1.75rem); letter-spacing:.05em; }
.section > .wrap > .lead{ margin:22px 0 0; max-width:660px; color:var(--ink-soft); }

/* ---------- 事業内容 ---------- */

.cards{
  display:grid; grid-template-columns:repeat(3,1fr);
  gap:1px; background:var(--rule); margin-top:46px; border:1px solid var(--rule);
}
.card{ background:var(--ground); padding:34px 30px 38px; }
.section--alt .card{ background:var(--ground-alt); }
.card-num{
  font-family:"Noto Serif JP",Georgia,serif;
  font-size:13px; color:var(--accent); letter-spacing:.14em; display:block; margin-bottom:12px;
}
.card h3{ font-size:1.05rem; letter-spacing:.04em; }
.card p{ margin:14px 0 0; font-size:14.5px; line-height:1.95; color:var(--ink-soft); }

/* ---------- 海外ブランドの皆様へ ---------- */

.band{ background:var(--band); color:#eef3f7; padding:92px 0; }
.band h2{ color:#fff; font-size:clamp(1.3rem,2.8vw,1.8rem); }
.band .eyebrow{ color:#7fa6c4; }
.band .rule{ width:56px; height:2px; background:#4f88b5; margin:26px 0 30px; }
.band p{ max-width:660px; color:#c4d4e0; margin:0 0 20px; }
.band p:last-of-type{ margin-bottom:0; }
.band strong{ color:#fff; font-weight:500; }

.btn{
  display:inline-block; margin-top:34px;
  border:1px solid #4f88b5; color:#fff;
  padding:13px 26px; font-size:13.5px; letter-spacing:.1em;
}
.btn:hover{ background:#4f88b5; color:#fff; text-decoration:none; }

/* ---------- 会社概要 ---------- */

.facts{ margin:46px 0 0; border-top:1px solid var(--rule); }
.facts div{
  display:grid; grid-template-columns:200px 1fr;
  gap:24px; padding:18px 0; border-bottom:1px solid var(--rule);
}
.facts dt{
  font-size:13px; color:var(--muted); letter-spacing:.08em; line-height:1.9; margin:0;
}
.facts dd{ margin:0; font-size:15px; color:var(--ink); line-height:1.9; }

/* ---------- contact ---------- */

.contact-block{ margin-top:38px; font-size:15px; line-height:2.1; color:var(--ink-soft); }
.contact-block .name{ color:var(--ink); font-size:16px; }
.contact-block a{ font-weight:500; }

/* ---------- footer ---------- */

.site-footer{
  background:var(--band); color:#8ba6bb; padding:44px 0; font-size:12.5px; line-height:2;
}
.footer-inner{ display:flex; justify-content:space-between; gap:20px; flex-wrap:wrap; }
.site-footer a{ color:#c4d4e0; }

/* ---------- responsive ---------- */

@media (max-width:820px){
  .cards{ grid-template-columns:1fr; }
  .facts div{ grid-template-columns:1fr; gap:4px; padding:16px 0; }
  .hero{ padding:72px 0 62px; }
  .section,.band{ padding:64px 0; }
  .site-nav{ gap:16px; }
  .site-nav a:not(.lang){ display:none; }
  .wrap{ padding:0 20px; }
}

/* ---------- photos (2026-09-27) ----------
   画像は Wikimedia Commons の CC0／パブリックドメイン（出典は img/CREDITS.txt）。
   メーカーの商品写真・ロゴは使わない（取引があるように見せないため） */

.hero--photo{
  position:relative; border-bottom:0;
  background:#0f2537 url(/img/hero-port.jpg) center/cover no-repeat;
  padding:104px 0 92px;
}
.hero--photo::before{
  content:""; position:absolute; inset:0;
  background:linear-gradient(90deg,rgba(9,24,38,.92) 0%,rgba(9,24,38,.72) 50%,rgba(9,24,38,.35) 100%);
}
.hero--photo .wrap{ position:relative; }
.hero--photo h1{ color:#fff; }
.hero--photo .lede{ color:#a9cbe6; }
.hero--photo .rule{ background:#a9cbe6; }
.hero--photo .hero-body{ color:#dfe8ef; }

.cards > .card{ min-width:0; }
.card-img{
  display:block; width:100%; height:150px; object-fit:cover;
  margin:0 0 20px;
}
.wide-img{ display:block; width:100%; height:220px; object-fit:cover; margin-top:36px; }

.band--photo{
  background:
    linear-gradient(rgba(15,37,55,.78),rgba(15,37,55,.82)),
    url(/img/band-tokyo.jpg) center/cover no-repeat;
}

@media (max-width:820px){
  .hero--photo{ padding:88px 0 76px; }
  .hero--photo::before{ background:rgba(9,24,38,.8); }
  .card-img{ height:160px; }
  .wide-img{ height:180px; }
}