:root{
  --navy:#1b2a4a;
  --navy-dark:#121d35;
  --accent:#b8953f;
  --text:#2b2b2b;
  --muted:#6b7280;
  --bg-alt:#f4f6f9;
  --line:#e3e7ee;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Hiragino Kaku Gothic ProN","Hiragino Sans","Yu Gothic","Meiryo",sans-serif;color:var(--text);line-height:1.8;background:#fff}
a{color:inherit;text-decoration:none}
.container{max-width:1040px;margin:0 auto;padding:0 20px}

/* header */
.header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(6px)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px;max-width:1200px}
/* 会社名: 業務マニュアルの「Do The Right Thing」と同じ組み方（太字・字間を大きく）。英字のみ・KEIBAI BASE の紺（10/19） */
.logo{display:inline-flex;align-items:center;white-space:nowrap;font-family:"Hiragino Kaku Gothic ProN","Hiragino Sans","Yu Gothic Medium","Yu Gothic",Meiryo,sans-serif;font-weight:700;line-height:1.2}
.logo-en{font-size:1.4rem;letter-spacing:.24em;color:#1c2541}
@media(max-width:600px){.logo-en{font-size:1.1rem;letter-spacing:.2em}}
.nav{display:flex;gap:24px;font-size:.95rem;white-space:nowrap}
.nav a{padding:6px 0;border-bottom:2px solid transparent;transition:.2s}
.nav a:hover{border-color:var(--navy)}
.nav a[aria-current="page"]{border-color:var(--accent)}
.nav-cta{background:var(--navy);color:#fff!important;padding:8px 18px!important;border-radius:4px;border:none!important}
.nav-cta:hover{background:var(--navy-dark)}
.menu-btn{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.menu-btn span{display:block;width:24px;height:2px;background:var(--navy)}

/* hero */
.hero{background:linear-gradient(135deg,var(--navy) 0%,var(--navy-dark) 100%);color:#fff;padding:110px 0 120px;position:relative;overflow:hidden}
/* 背景の夜景8枚（Unsplash の無料写真）を10秒ずつ切り替える（1周80秒）。紺を重ねて文字を読みやすくする */
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;animation:hero-fade 80s infinite}
.hero-bg:nth-child(2){animation-delay:10s}
.hero-bg:nth-child(3){animation-delay:20s}
.hero-bg:nth-child(4){animation-delay:30s}
.hero-bg:nth-child(5){animation-delay:40s}
.hero-bg:nth-child(6){animation-delay:50s}
.hero-bg:nth-child(7){animation-delay:60s}
.hero-bg:nth-child(8){animation-delay:70s}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(18,29,53,.85) 0%,rgba(18,29,53,.55) 60%,rgba(18,29,53,.35) 100%)}
.hero .container{position:relative;z-index:1}
@keyframes hero-fade{0%{opacity:0}2.5%{opacity:1}12.5%{opacity:1}15%{opacity:0}100%{opacity:0}}
@media(prefers-reduced-motion:reduce){.hero-bg{animation:none}.hero-bg:nth-child(1){opacity:1}}
.hero-sub{color:var(--accent);font-weight:700;letter-spacing:.15em;font-size:.9rem;margin-bottom:16px}
.hero-title{font-size:clamp(1.3rem,6.5vw,3rem);line-height:1.4;font-weight:700;margin-bottom:24px}
.hero-lead{max-width:520px;opacity:.9;margin-bottom:36px}
.btn{display:inline-block;padding:14px 36px;border-radius:4px;font-weight:700;transition:.2s}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{filter:brightness(1.1)}
.btn-light{background:#fff;color:var(--navy)}
.btn-light:hover{background:#eef1f6}
.hero-btns{display:flex;flex-wrap:wrap;gap:12px}
.hero-btns .btn{text-align:center}
@media(max-width:600px){.hero-btns{display:inline-grid}}

/* keibaibase screenshots */
.keibaibase-shots{display:grid;grid-template-columns:1fr 1fr;gap:24px;max-width:940px;margin:0 auto 40px;align-items:start}
.keibaibase-shot{border:1px solid var(--line);border-radius:8px;overflow:hidden;box-shadow:0 8px 20px rgba(27,42,74,.1);background:#fff}
.keibaibase-shot img{display:block;width:100%;height:auto}
.keibaibase-shot a{display:block;cursor:zoom-in}
.shot-caption{padding:8px 10px;font-size:.8rem;color:var(--muted);text-align:center;border-top:1px solid var(--line)}
@media(max-width:600px){.keibaibase-shots{grid-template-columns:1fr}}

/* sections */
.section{padding:90px 0}
.section-alt{background:var(--bg-alt)}
.section-title{text-align:center;font-size:1.7rem;color:var(--navy);margin-bottom:56px;display:flex;flex-direction:column;align-items:center;gap:6px}
.section-title .en{font-size:.8rem;letter-spacing:.25em;color:var(--accent);font-weight:700}
.section-title::after{content:"";width:40px;height:2px;background:var(--navy);margin-top:14px}
.section-title.light{color:#fff}
.section-title.light::after{background:var(--accent)}

/* cards */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{background:#fff;border:1px solid var(--line);border-radius:8px;padding:32px 16px;text-align:center;transition:.2s}
.card:hover{box-shadow:0 8px 24px rgba(27,42,74,.1);transform:translateY(-3px)}
.card-icon{width:64px;height:64px;border-radius:50%;background:var(--navy);color:#fff;font-size:1.5rem;font-weight:700;display:flex;align-items:center;justify-content:center;margin:0 auto 20px}
.card h3{color:var(--navy);margin-bottom:12px;font-size:1.05rem}
.card p{font-size:.9rem;color:var(--muted);text-align:left}
.card-link{display:flex;flex-direction:column;color:inherit}
.card-more{display:block;margin-top:auto;padding-top:14px;font-size:.85rem;font-weight:700;color:var(--accent)}
.card-link:hover .card-more{text-decoration:underline}

/* reasons */
.reasons{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.reason{padding:0 12px}
.reason strong{display:block;font-size:2rem;color:var(--accent);line-height:1;margin-bottom:12px}
.reason h3{color:var(--navy);margin-bottom:8px}
.reason p{font-size:.95rem;color:var(--muted)}

/* company */
.company-table{width:100%;max-width:760px;margin:0 auto;border-collapse:collapse;border-top:1px solid var(--line)}
.company-table th,.company-table td{padding:16px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.company-table th{width:25%;color:var(--navy);font-weight:700;background:var(--bg-alt)}
.biz-list{list-style:none;margin:0;padding:0}
.biz-list li{padding-left:1em;text-indent:-1em}
.biz-list li::before{content:"・"}

/* access */
.access{display:grid;grid-template-columns:1.4fr 1fr;gap:36px;align-items:center}
.map{aspect-ratio:16/10;border-radius:8px;overflow:hidden;border:1px solid var(--line)}
.map iframe{width:100%;height:100%;border:0}
.access-text p{margin-bottom:16px}

/* works（開発事例） */
.page-back{margin-bottom:24px;font-size:.9rem}
.page-back a{color:var(--muted)}
.page-back a:hover{color:var(--navy)}
.works-lead{max-width:640px;margin:-24px auto 40px;text-align:center;color:var(--muted);font-size:.9rem}
.works{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.work{border:1px solid var(--line);border-radius:8px;overflow:hidden;background:#fff;display:flex;flex-direction:column}
.work-shot{position:relative;background:var(--bg-alt);aspect-ratio:16/10;overflow:hidden;border-bottom:1px solid var(--line)}
/* パソコンの画面は枠いっぱい。スマホの画面は2枚を並べて全体を見せる。押すと原寸で開く */
.work-shot img{position:absolute;top:18px;left:18px;width:calc(100% - 36px);height:calc(100% - 36px);object-fit:cover;object-position:top left;border-radius:6px;box-shadow:0 6px 18px rgba(27,42,74,.15)}
.work-shot.is-phone{aspect-ratio:auto;display:flex;justify-content:center;gap:16px;padding:24px 18px}
.work-shot.is-phone a{flex:0 1 46%}
.work-shot.is-phone img{position:static;width:100%;height:auto;border-radius:14px;border:4px solid #1f2937}
.work-body{padding:20px 22px 24px}
.work-tag{display:inline-block;font-size:.75rem;color:var(--accent);border:1px solid var(--accent);border-radius:999px;padding:1px 10px;margin-bottom:8px}
.work h3{color:var(--navy);font-size:1.1rem;margin-bottom:8px}
.work p{font-size:.9rem;color:var(--muted)}
.work-sub{display:block;font-size:.78rem;font-weight:500;color:var(--muted);margin-top:2px}
.works-sub{font-size:1.15rem;color:var(--navy);margin:56px 0 20px;padding-left:12px;border-left:3px solid var(--accent)}
@media(max-width:768px){.works{grid-template-columns:1fr}}

/* contact */
.contact{background:var(--navy);color:#fff}
.contact-lead{text-align:center;margin:-30px 0 40px;opacity:.9}
.contact-box{display:grid;grid-template-columns:1fr 1fr;gap:28px;max-width:760px;margin:0 auto}
.contact-tel,.contact-mail{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.15);border-radius:8px;padding:32px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:10px}
.contact .icon{width:56px;height:56px;border-radius:50%;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;margin-bottom:6px}
.contact .icon svg{width:26px;height:26px}
.tel{font-size:2rem;font-weight:700;letter-spacing:.03em}
.note{font-size:.85rem;opacity:.8}
.mail-addr{font-size:1.25rem;font-weight:700;letter-spacing:.03em;word-break:break-all;margin-bottom:6px}

/* footer */
.footer{background:var(--navy-dark);color:#fff;padding:14px 0;font-size:.85rem;text-align:center;opacity:.9}
.copy{opacity:.6}

@media(max-width:900px){.cards{grid-template-columns:1fr 1fr}}

/* mobile */
@media(max-width:768px){
  .menu-btn{display:flex}
  .nav{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;gap:0;border-bottom:1px solid var(--line)}
  .nav a{padding:16px 20px;border-bottom:1px solid var(--line)}
  .nav-cta{border-radius:0;margin:0}
  body.menu-open .nav{display:flex}
  .hero{padding:70px 0 80px}
  .section{padding:60px 0}
  .cards,.reasons,.access,.contact-box{grid-template-columns:1fr}
  .company-table th{width:35%}
}

/* 開発事例の画像の拡大表示 */
.lightbox{position:fixed;inset:0;z-index:1000;background:rgba(15,20,35,.88);display:flex;align-items:center;justify-content:center;padding:56px 16px 24px;cursor:zoom-out}
.lightbox[hidden]{display:none}
.lightbox figure{margin:0;max-width:100%;max-height:100%;display:flex;flex-direction:column;align-items:center}
.lightbox-imgs{display:flex;justify-content:center;gap:20px;max-width:100%}
.lightbox-imgs.is-phone img{max-width:calc(50% - 10px);min-width:0;border-radius:14px;border:4px solid #1f2937}
.lightbox img{max-width:min(1200px,100%);max-height:calc(100vh - 120px);object-fit:contain;border-radius:6px;box-shadow:0 10px 40px rgba(0,0,0,.4);cursor:default;background:#fff}
.lightbox figcaption{color:#e5e7eb;font-size:.85rem;margin-top:12px;text-align:center}
.lightbox-close{position:absolute;top:12px;right:16px;width:44px;height:44px;border:0;border-radius:50%;background:rgba(255,255,255,.12);color:#fff;font-size:1.8rem;line-height:1;cursor:pointer}
.lightbox-close:hover{background:rgba(255,255,255,.25)}
body.lightbox-open{overflow:hidden}

/* 競売サポート・不動産コンサルティングのページ */
.svc-lead{max-width:760px;color:var(--muted);margin-bottom:24px}
.svc-items{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.svc-item{background:#fff;border:1px solid var(--line);border-radius:8px;padding:24px 22px}
.svc-item h4{color:var(--navy);font-size:1.05rem;margin-bottom:10px;padding-left:10px;border-left:3px solid var(--accent);line-height:1.4}
.svc-item p{font-size:.9rem;color:var(--text);line-height:1.65}
.svc-note{font-size:.8rem!important;color:var(--muted)!important;margin-top:10px;line-height:1.6!important}
.svc-note a{color:var(--navy);text-decoration:underline}
.svc-note-wide{margin-top:28px;text-align:center}
.svc-price-box{margin-top:32px}
.svc-price-box h4{color:var(--navy);font-size:1rem;margin-bottom:12px}
.svc-price{width:100%;border-collapse:collapse;font-size:.9rem}
.svc-price th,.svc-price td{border:1px solid var(--line);padding:10px 12px;text-align:center}
.svc-price th{background:var(--bg-alt);color:var(--navy);font-weight:700}
.svc-price td:first-child{text-align:left}
.svc-price td:not(:first-child){white-space:nowrap}
@media(max-width:900px){.svc-items{grid-template-columns:1fr}}
.nw{display:inline-block}
.svc-items-2{grid-template-columns:repeat(2,1fr)}
.svc-check{list-style:none;display:grid;grid-template-columns:repeat(2,1fr);gap:10px 20px;max-width:1000px;margin:0 auto 20px}
.svc-check li{position:relative;padding:12px 14px 12px 44px;background:var(--bg-alt);border-radius:6px;font-size:.92rem}
.svc-check li::before{content:"";position:absolute;left:16px;top:50%;width:16px;height:16px;margin-top:-8px;border:2px solid var(--accent);border-radius:3px}
.svc-check li::after{content:"";position:absolute;left:21px;top:50%;width:5px;height:9px;margin-top:-7px;border:solid var(--accent);border-width:0 2px 2px 0;transform:rotate(45deg)}
.svc-lead-center{text-align:center;margin:0 auto}
.svc-more{text-align:right;margin-top:14px;font-size:.9rem}
.svc-more a{color:var(--accent);font-weight:700}
.svc-more a:hover{text-decoration:underline}
.svc-steps{list-style:none;counter-reset:step;display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.svc-steps li{counter-increment:step;background:#fff;border:1px solid var(--line);border-radius:8px;padding:18px 16px;font-size:.85rem;color:var(--muted)}
.svc-steps li::before{content:counter(step);display:flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;background:var(--navy);color:#fff;font-weight:700;font-size:.85rem;margin-bottom:10px}
.svc-steps strong{display:block;color:var(--navy);font-size:.95rem;margin-bottom:4px}
@media(max-width:900px){.svc-items-2,.svc-check{grid-template-columns:1fr}.svc-steps{grid-template-columns:1fr}}
.svc-badge{display:inline-block;margin-left:8px;padding:1px 9px;border-radius:999px;background:var(--accent);color:#fff;font-size:.72rem;font-weight:700;vertical-align:2px}
.svc-badge.is-paid{background:var(--navy)}
/* お支払い方法（10/20）。カードのマークは仮（simple-icons）で、公式の素材が手に入ったら img/cards/ を差し替える */
.pay-box{display:grid;grid-template-columns:minmax(0,520px) auto;justify-content:start;column-gap:56px;margin-top:12px}
.pay-info{padding:22px 0}
.pay-title{font-weight:700;color:var(--navy);font-size:.95rem;margin-bottom:6px}
.pay-text{font-size:.82rem;color:var(--muted);line-height:1.7;max-width:520px}
.pay-stripe{display:inline-block;line-height:0;opacity:.85}
.pay-stripe:hover{opacity:1}
.pay-side{display:grid;align-content:center;justify-items:start;gap:10px;padding:22px 0}
.pay-logos{list-style:none;display:grid;grid-template-columns:repeat(4,64px);gap:8px}
.pay-logos li{display:flex;align-items:center;justify-content:center;height:40px;border-radius:6px;background:#fff;border:1px solid var(--line)}
.pay-logos img{width:42px;height:26px;object-fit:contain}
.pay-bank{width:100%;font-size:.75rem;color:var(--muted);text-align:center}
@media(max-width:760px){.pay-box{grid-template-columns:1fr}.pay-side{padding:0 0 20px}.pay-info{padding:20px 0 14px}.pay-bank{text-align:left}}