/* ============================================================
   案D: 洗練コーポレート型（縦サイドナビ）— DIMENSION参考
   配色: オフホワイト(#f7f6f3) × インクブラック × モノクロ
   フォント: Space Grotesk（英字）/ Noto Sans JP（日本語）
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;600;700&family=Space+Grotesk:wght@300;400;500;600;700&display=swap');
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
:root{--bg:#f7f6f3;--ink:#1a1a1a;--mid:#6b6b6b;--light:#e8e7e4;--white:#ffffff;--nav-w:200px;--sg:'Space Grotesk',sans-serif;--noto:'Noto Sans JP',sans-serif;}
html{scroll-behavior:smooth;}
body{font-family:var(--noto);background:var(--bg);color:var(--ink);line-height:1.7;}
img{max-width:100%;display:block;}a{color:inherit;text-decoration:none;}

/* ── サイドナビ ── */
#side-nav{
  position:fixed;top:0;left:0;width:var(--nav-w);height:100vh;
  background:var(--ink);display:flex;flex-direction:column;z-index:100;
}
.nav-logo{padding:1.75rem 1.5rem 1.25rem;border-bottom:1px solid rgba(255,255,255,.06);}
.nav-logo-en{font-family:var(--sg);font-size:.875rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--white);}
.nav-logo-ja{font-size:.7rem;color:rgba(255,255,255,.3);margin-top:.2rem;}
.nav-links{flex:1;display:flex;flex-direction:column;justify-content:center;padding:1rem 1.5rem;gap:.25rem;}
.nav-link{display:flex;align-items:center;gap:.75rem;padding:.625rem 0;cursor:pointer;background:none;border:none;text-align:left;width:100%;transition:all .2s;}
.nav-indicator{width:3px;height:4px;background:rgba(255,255,255,.2);border-radius:2px;flex-shrink:0;transition:all .3s;}
.nav-link.active .nav-indicator,.nav-link:hover .nav-indicator{height:20px;background:var(--white);}
.nav-label{font-family:var(--sg);font-size:.7rem;letter-spacing:.15em;text-transform:uppercase;color:rgba(255,255,255,.35);transition:color .2s;}
.nav-link.active .nav-label,.nav-link:hover .nav-label{color:var(--white);font-weight:600;}
.nav-footer{padding:1.25rem 1.5rem;border-top:1px solid rgba(255,255,255,.06);}
.nav-tel{display:flex;align-items:center;gap:.5rem;font-family:var(--sg);font-size:.7rem;color:rgba(255,255,255,.3);margin-bottom:.875rem;}
.nav-contact-btn{width:100%;background:var(--white);color:var(--ink);padding:.625rem;font-family:var(--sg);font-size:.65rem;letter-spacing:.15em;text-transform:uppercase;border:none;cursor:pointer;transition:opacity .2s;}
.nav-contact-btn:hover{opacity:.85;}

/* ── モバイルヘッダー ── */
#mobile-header{display:none;position:fixed;top:0;left:0;right:0;z-index:100;background:var(--ink);height:56px;align-items:center;justify-content:space-between;padding:0 1.25rem;}
.mobile-logo{font-family:var(--sg);font-size:.875rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--white);}
.mobile-menu-btn{background:none;border:none;color:rgba(255,255,255,.6);font-size:1.25rem;cursor:pointer;}
#mobile-menu{position:fixed;inset:0;z-index:200;background:var(--ink);display:none;flex-direction:column;padding:1.5rem;}
#mobile-menu.open{display:flex;}
.mobile-menu-close{align-self:flex-end;background:none;border:none;color:rgba(255,255,255,.6);font-size:1.5rem;cursor:pointer;margin-bottom:2rem;}
.mobile-nav-links{display:flex;flex-direction:column;gap:1rem;}
.mobile-nav-links button{background:none;border:none;color:rgba(255,255,255,.5);font-family:var(--sg);font-size:.75rem;letter-spacing:.15em;text-transform:uppercase;text-align:left;cursor:pointer;padding:.5rem 0;border-bottom:1px solid rgba(255,255,255,.06);}
@media(max-width:900px){#side-nav{display:none;}#mobile-header{display:flex;}.main-content{margin-left:0!important;padding-top:56px;}}

/* ── メインコンテンツ ── */
.main-content{margin-left:var(--nav-w);}

/* ── ヒーロー ── */
#hero{position:relative;min-height:100vh;display:flex;flex-direction:column;justify-content:flex-end;overflow:hidden;}
.hero-bg{position:absolute;inset:0;background:url('../images/hero-bg.jpg') center/cover no-repeat;filter:brightness(.25);}
.hero-content{position:relative;z-index:1;padding:2.5rem 3rem 5rem;}
.hero-small{font-family:var(--sg);font-size:.65rem;letter-spacing:.2em;text-transform:uppercase;color:rgba(255,255,255,.3);margin-bottom:1rem;}
.hero-title{font-family:var(--sg);font-size:clamp(3.5rem,8vw,7rem);font-weight:700;letter-spacing:-.03em;color:var(--white);line-height:1;margin-bottom:.75rem;}
.hero-subtitle{font-size:1.1rem;font-weight:300;color:rgba(255,255,255,.65);margin-bottom:.75rem;}
.hero-desc{font-size:.85rem;color:rgba(255,255,255,.4);max-width:480px;margin-bottom:2.5rem;}
.hero-btn{display:inline-flex;align-items:center;gap:.75rem;font-family:var(--sg);font-size:.7rem;letter-spacing:.15em;text-transform:uppercase;background:var(--white);color:var(--ink);padding:.875rem 2rem;border:none;cursor:pointer;transition:opacity .2s;}
.hero-btn:hover{opacity:.85;}
.scroll-line{position:absolute;bottom:2rem;left:3rem;display:flex;flex-direction:column;align-items:flex-start;gap:.5rem;}
.scroll-line span{font-family:var(--sg);font-size:.6rem;letter-spacing:.2em;text-transform:uppercase;color:rgba(255,255,255,.3);}
.scroll-line div{width:1px;height:3rem;background:linear-gradient(to bottom,transparent,rgba(255,255,255,.4));}

/* ── 実績数値 ── */
.stats-bar{border-top:1px solid var(--light);border-bottom:1px solid var(--light);}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);}
.stat-item{padding:2.5rem 2rem;border-right:1px solid var(--light);}
.stat-item:last-child{border-right:none;}
.stat-num{font-family:var(--sg);font-size:2.5rem;font-weight:700;color:var(--ink);line-height:1;margin-bottom:.25rem;}
.stat-en{font-family:var(--sg);font-size:.65rem;letter-spacing:.15em;text-transform:uppercase;color:var(--mid);}
.stat-ja{font-size:.75rem;color:var(--mid);margin-top:.2rem;}
@media(max-width:640px){.stats-grid{grid-template-columns:1fr 1fr;}}

/* ── セクション共通 ── */
.section{padding:5rem 3rem;}
.section-label{display:flex;align-items:center;gap:.75rem;margin-bottom:1.5rem;}
.section-label-line{width:1.5rem;height:1px;background:var(--ink);}
.section-label-text{font-family:var(--sg);font-size:.65rem;letter-spacing:.2em;text-transform:uppercase;color:var(--mid);}
.section-title{font-family:var(--sg);font-size:clamp(2rem,4vw,3.5rem);font-weight:700;letter-spacing:-.02em;margin-bottom:3.5rem;line-height:1.1;}
.bg-ink{background:var(--ink);}
.bg-white{background:var(--white);}

/* ── サービスグリッド ── */
.services-grid{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--light);}
.service-card{padding:2rem;border-right:1px solid var(--light);border-bottom:1px solid var(--light);transition:background .2s;}
.service-card:hover{background:var(--white);}
.service-card:nth-child(3n){border-right:none;}
.service-card:nth-child(4),.service-card:nth-child(5),.service-card:nth-child(6){border-bottom:none;}
.svc-num{font-family:var(--sg);font-size:.65rem;letter-spacing:.15em;color:var(--light);margin-bottom:.375rem;}
.svc-en{font-family:var(--sg);font-size:.65rem;letter-spacing:.15em;text-transform:uppercase;color:var(--mid);margin-bottom:.5rem;}
.svc-name{font-size:.875rem;font-weight:600;margin-bottom:.5rem;}
.svc-desc{font-size:.8rem;color:var(--mid);line-height:1.7;}
@media(max-width:768px){.services-grid{grid-template-columns:1fr 1fr;}.service-card:nth-child(2n){border-right:none;}.service-card:nth-child(3n){border-right:1px solid var(--light);}}
@media(max-width:480px){.services-grid{grid-template-columns:1fr;}.service-card{border-right:none!important;}}

/* ── フルブリード写真 ── */
.fullbleed{position:relative;height:50vh;overflow:hidden;}
.fullbleed-bg{position:absolute;inset:0;background:url('../images/office-scene.jpg') center/cover no-repeat;}
.fullbleed-content{position:absolute;bottom:2.5rem;left:3rem;right:3rem;}
.fullbleed-quote{font-size:1.25rem;font-weight:300;color:var(--white);line-height:1.6;max-width:500px;}
.fullbleed-attr{font-family:var(--sg);font-size:.65rem;letter-spacing:.1em;color:rgba(255,255,255,.5);margin-top:.75rem;}

/* ── フロー ── */
.flow-list{border-top:1px solid var(--light);}
.flow-item{display:flex;gap:3rem;align-items:flex-start;padding:2rem 0;border-bottom:1px solid var(--light);}
.flow-num{font-family:var(--sg);font-size:.65rem;letter-spacing:.15em;color:var(--light);width:3rem;flex-shrink:0;padding-top:.2rem;}
.flow-en{font-family:var(--sg);font-size:.65rem;letter-spacing:.15em;text-transform:uppercase;color:var(--mid);width:9rem;flex-shrink:0;padding-top:.2rem;}
.flow-body{}
.flow-name{font-size:.875rem;font-weight:600;margin-bottom:.375rem;}
.flow-desc{font-size:.8rem;color:var(--mid);line-height:1.7;}
@media(max-width:640px){.flow-item{flex-direction:column;gap:.75rem;}.flow-en{width:auto;}}

/* ── 事例（ダーク） ── */
.cases-grid-dark{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid rgba(255,255,255,.08);}
.case-dark{padding:2.5rem;border-right:1px solid rgba(255,255,255,.08);}
.case-dark:last-child{border-right:none;}
.case-num-dark{font-family:var(--sg);font-size:3rem;font-weight:700;color:rgba(255,255,255,.06);line-height:1;margin-bottom:1.5rem;}
.case-title-dark{font-size:.875rem;font-weight:600;color:var(--white);margin-bottom:.625rem;}
.case-desc-dark{font-size:.8rem;color:rgba(255,255,255,.4);line-height:1.7;}
@media(max-width:768px){.cases-grid-dark{grid-template-columns:1fr;}.case-dark{border-right:none;border-bottom:1px solid rgba(255,255,255,.08);}}

/* ── お客様の声 ── */
.voices-grid{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--light);}
.voice-item{padding:2.5rem;border-right:1px solid var(--light);}
.voice-item:last-child{border-right:none;}
.voice-mark{font-family:var(--sg);font-size:2.5rem;font-weight:300;color:var(--light);line-height:1;margin-bottom:1.25rem;}
.voice-text{font-size:.8rem;color:var(--mid);line-height:1.8;font-style:italic;margin-bottom:1.25rem;}
.voice-name{font-size:.8rem;font-weight:600;}
.voice-role{font-size:.75rem;color:var(--light);margin-top:.2rem;}
@media(max-width:768px){.voices-grid{grid-template-columns:1fr;}.voice-item{border-right:none;border-bottom:1px solid var(--light);}}

/* ── 代表者 ── */
.profile-grid{display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:start;}
.profile-img{aspect-ratio:3/4;background:url('../images/profile.jpg') center/cover no-repeat;}
.profile-en-label{font-family:var(--sg);font-size:.65rem;letter-spacing:.15em;text-transform:uppercase;color:var(--mid);margin-bottom:.5rem;}
.profile-name-en{font-family:var(--sg);font-size:clamp(2rem,3.5vw,3rem);font-weight:700;letter-spacing:-.03em;line-height:1.1;margin-bottom:.25rem;}
.profile-name-ja{font-size:.875rem;color:var(--mid);margin-bottom:.25rem;}
.profile-cert{font-size:.75rem;color:var(--light);margin-bottom:2rem;}
.profile-text p{font-size:.85rem;color:var(--mid);line-height:1.9;margin-bottom:1rem;}
.profile-link{display:inline-flex;align-items:center;gap:.5rem;font-family:var(--sg);font-size:.65rem;letter-spacing:.15em;text-transform:uppercase;color:var(--ink);margin-top:1.5rem;cursor:pointer;}
@media(max-width:768px){.profile-grid{grid-template-columns:1fr;}}

/* ── FAQ ── */
.faq-list{border-top:1px solid var(--light);}
.faq-item{border-bottom:1px solid var(--light);}
.faq-q{width:100%;display:flex;align-items:flex-start;justify-content:space-between;padding:1.5rem 0;background:none;border:none;cursor:pointer;font-size:.875rem;gap:1.5rem;text-align:left;}
.faq-icon{font-size:.875rem;color:var(--mid);flex-shrink:0;margin-top:.1rem;transition:transform .25s;}
.faq-a{display:none;padding-bottom:1.5rem;font-size:.8rem;color:var(--mid);line-height:1.8;}
.faq-item.open .faq-a{display:block;}
.faq-item.open .faq-icon{transform:rotate(45deg);}

/* ── ニュース ── */
.news-list{border-top:1px solid var(--light);}
.news-item{display:flex;gap:2.5rem;align-items:baseline;padding:1.25rem 0;border-bottom:1px solid var(--light);cursor:pointer;}
.news-date{font-family:var(--sg);font-size:.7rem;color:var(--light);flex-shrink:0;width:4rem;}
.news-cat{font-family:var(--sg);font-size:.65rem;letter-spacing:.1em;text-transform:uppercase;color:var(--mid);border:1px solid var(--light);padding:.125rem .5rem;flex-shrink:0;}
.news-title{font-size:.8rem;color:var(--ink);}
@media(max-width:640px){.news-item{flex-wrap:wrap;gap:.75rem;}}

/* ── アクセス ── */
.access-grid{display:grid;grid-template-columns:1fr 1fr;gap:4rem;}
.access-table{width:100%;border-collapse:collapse;}
.access-table tr{border-bottom:1px solid var(--light);}
.access-table td{padding:1rem 0;font-size:.8rem;vertical-align:top;}
.access-table td:first-child{width:5rem;font-family:var(--sg);font-size:.65rem;letter-spacing:.1em;text-transform:uppercase;color:var(--light);}
.map-placeholder{width:100%;height:240px;background:var(--white);border:1px solid var(--light);display:flex;align-items:center;justify-content:center;font-family:var(--sg);font-size:.65rem;letter-spacing:.1em;text-transform:uppercase;color:var(--light);}
@media(max-width:768px){.access-grid{grid-template-columns:1fr;}}

/* ── お問い合わせ（ダーク） ── */
.contact-form{max-width:480px;display:flex;flex-direction:column;gap:2rem;}
.form-label{font-family:var(--sg);font-size:.65rem;letter-spacing:.2em;text-transform:uppercase;color:rgba(255,255,255,.25);display:block;margin-bottom:.625rem;}
.form-input{width:100%;background:transparent;border:none;border-bottom:1px solid rgba(255,255,255,.12);color:var(--white);font-size:.875rem;padding:.625rem 0;outline:none;font-family:var(--noto);transition:border-color .2s;}
.form-input:focus{border-color:rgba(255,255,255,.35);}
.form-input::placeholder{opacity:.2;}
textarea.form-input{resize:vertical;min-height:90px;}
.btn-submit-dark{display:inline-flex;align-items:center;gap:.75rem;font-family:var(--sg);font-size:.65rem;letter-spacing:.15em;text-transform:uppercase;background:var(--white);color:var(--ink);padding:.875rem 2rem;border:none;cursor:pointer;margin-top:.5rem;transition:opacity .2s;}
.btn-submit-dark:hover{opacity:.85;}
.success-msg{text-align:center;padding:4rem 0;}
.success-msg .check{font-family:var(--sg);font-size:2rem;color:rgba(255,255,255,.2);margin-bottom:1rem;}
.success-msg p{font-size:.85rem;color:rgba(255,255,255,.4);}

/* ── フッター ── */
#footer{padding:2.5rem 3rem;background:var(--ink);border-top:1px solid rgba(255,255,255,.06);display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1rem;}
.footer-logo{font-family:var(--sg);font-size:.7rem;letter-spacing:.15em;text-transform:uppercase;color:rgba(255,255,255,.2);}
.footer-copy{font-family:var(--sg);font-size:.65rem;color:rgba(255,255,255,.15);}