/* =========================================================
   株式会社凌宇 — 公式网页样式
   设计理念：日本风格 / 大量留白 / 細線分割 / 深緑主色
   ========================================================= */

:root{
  /* ── 色彩系（保留原站绿系 + 升级层次） ── */
  --green-900:#0f3d1e;       /* 最深：見出し背景 */
  --green-800:#1B5E20;       /* 主色：导航 / CTA */
  --green-700:#2E7D32;       /* 副色：hover / icon */
  --green-500:#4a8f4d;       /* 点缀 */
  --green-100:#E8F5E9;       /* 淡背景：section bg */
  --green-50:#f1f8f2;        /* 极淡：卡片底 */

  /* ── 中性色 ── */
  --ink:#1a1a1a;
  --ink-soft:#3a3a3a;
  --ink-mute:#6b6b6b;
  --ink-faint:#9a9a9a;
  --line:#e6e6e2;            /* 分割线 */
  --line-soft:#f0efe9;
  --paper:#fbfaf6;           /* 全体背景：和纸感 */
  --paper-2:#ffffff;
  --paper-3:#f4f1ea;

  /* ── 字体 ── */
  --font-serif:'Shippori Mincho B1', 'Hiragino Mincho ProN', 'Yu Mincho', serif;
  --font-sans:'Noto Sans JP', 'Hiragino Sans', 'Yu Gothic', sans-serif;
  --font-num:'Inter', 'Helvetica Neue', sans-serif;

  /* ── 节奏 ── */
  --c-max:1200px;
  --c-narrow:960px;
  --gap-section:50px;
  --gap-block:40px;
  --radius-sm:2px;
  --radius-md:4px;
}

/* ── Reset / Base ── */
*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  font-family:var(--font-sans);
  font-weight:400;
  color:var(--ink);
  background:var(--paper);
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  font-size:15px;
  letter-spacing:0.02em;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
button{ font-family:inherit; cursor:pointer; }

.container{ max-width:var(--c-max); margin:0 auto; padding:0 32px; }
@media (max-width:720px){ .container{ padding:0 20px; } }

/* =========================================================
   Header
   ========================================================= */
.site-header{
  position:fixed; inset:0 0 auto 0;
  z-index:100;
  background:rgba(251,250,246,0.86);
  backdrop-filter:saturate(180%) blur(12px);
  -webkit-backdrop-filter:saturate(180%) blur(12px);
  border-bottom:0.5px solid transparent;
  transition:border-color .3s, background .3s;
}
.site-header.scrolled{
  border-bottom-color:var(--line);
  background:rgba(251,250,246,0.94);
}
.header-inner{
  max-width:var(--c-max);
  margin:0 auto;
  padding:18px 32px;
  display:flex; align-items:center; justify-content:space-between; gap:32px;
}
@media (max-width:720px){ .header-inner{ padding:14px 20px; } }

.brand{ display:flex; align-items:center; gap:12px; }
.brand-mark{
  width:44px; height:44px;
  object-fit:contain;
  border-radius:8px;
}
.brand-text{ display:flex; flex-direction:column; line-height:1.2; }
.brand-name-ja{ font-family:var(--font-serif); font-size:16px; font-weight:500; letter-spacing:0.04em; }
.brand-name-en{ font-family:var(--font-num); font-size:10px; color:var(--ink-mute); letter-spacing:0.2em; text-transform:uppercase; }

.nav{ display:flex; align-items:center; gap:32px; }
@media (max-width:900px){ .nav{ display:none; } }
.nav-link{
  font-size:14px; font-weight:500;
  position:relative; padding:6px 0;
  transition:color .25s;
}
.nav-link::after{
  content:""; position:absolute; left:0; right:0; bottom:0;
  height:1px; background:var(--green-800);
  transform:scaleX(0); transform-origin:left;
  transition:transform .35s ease;
}
.nav-link:hover{ color:var(--green-800); }
.nav-link:hover::after{ transform:scaleX(1); }
.nav-link.active{ color:var(--green-800); }
.nav-link.active::after{ transform:scaleX(1); }
.nav-link.nav-cta{
  border:1px solid var(--green-800);
  padding:9px 22px; border-radius:999px;
  color:var(--green-800);
  transition:background .25s, color .25s;
}
.nav-link.nav-cta:hover{ background:var(--green-800); color:#fff; }
.nav-link.nav-cta::after{ display:none; }
/* scroll spy：該当セクションに来たら CTA も塗りつぶす */
.nav-link.nav-cta.active{ background:var(--green-800); color:#fff; }

/* 固定ヘッダー分、アンカー位置をずらす */
section[id]{ scroll-margin-top:92px; }

.nav-toggle{
  display:none;
  width:40px; height:40px;
  background:transparent; border:0; padding:0;
  flex-direction:column; justify-content:center; align-items:center; gap:5px;
}
.nav-toggle span{
  display:block; width:22px; height:1.5px; background:var(--ink);
  transition:transform .3s, opacity .3s;
}
@media (max-width:900px){ .nav-toggle{ display:flex; } }

.site-header.nav-open .nav{
  display:flex;
  position:absolute; top:100%; left:0; right:0;
  flex-direction:column; align-items:stretch; gap:0;
  background:var(--paper-2);
  border-top:0.5px solid var(--line);
  padding:12px 0;
}
.site-header.nav-open .nav-link{
  padding:14px 32px; border-bottom:0.5px solid var(--line-soft);
}
.site-header.nav-open .nav-link:last-child{ border-bottom:0; }
.site-header.nav-open .nav-link::after{ display:none; }
.site-header.nav-open .nav-link.nav-cta{
  margin:14px 32px; text-align:center; border:1px solid var(--green-800);
}

/* =========================================================
   Hero
   ========================================================= */
.hero{
  position:relative;
  height:100vh; min-height:680px;
  display:flex; align-items:center; justify-content:flex-start;
  overflow:hidden;
}
.hero-image{
  position:absolute; inset:0;
  background-size:cover; background-position:center;
  transform:scale(1.04);
  animation:heroZoom 14s ease-out forwards;
}
@keyframes heroZoom{ to{ transform:scale(1); } }
.hero-overlay{
  position:absolute; inset:0;
  background:
    linear-gradient(90deg, rgba(15,30,15,0.78) 0%, rgba(15,30,15,0.55) 40%, rgba(15,30,15,0.25) 100%),
    linear-gradient(0deg, rgba(0,0,0,0.45) 0%, rgba(0,0,0,0) 50%);
}
.hero-inner{
  position:relative;
  max-width:var(--c-max);
  width:100%;
  margin:0 auto;
  padding:0 32px;
  color:#fff;
}
@media (max-width:720px){ .hero-inner{ padding:0 20px; } }
.hero-eyebrow{
  font-family:var(--font-num);
  font-size:11px; letter-spacing:0.4em; text-transform:uppercase;
  color:rgba(255,255,255,0.78);
  margin:0 0 28px;
  padding-left:2px;
}
.hero-title{
  font-family:var(--font-serif);
  font-size:clamp(40px, 7vw, 88px);
  font-weight:500;
  line-height:1.15;
  letter-spacing:0.04em;
  margin:0 0 36px;
}
.hero-line{
  display:block;
  opacity:0; transform:translateY(24px);
  animation:lineIn 1s cubic-bezier(.2,.7,.2,1) forwards;
}
.hero-line:nth-child(1){ animation-delay:0.2s; }
.hero-line:nth-child(2){ animation-delay:0.5s; }
.hero-line:nth-child(3){ animation-delay:0.8s; }
@keyframes lineIn{ to{ opacity:1; transform:translateY(0); } }

.hero-tagline{
  font-size:clamp(14px, 1.4vw, 17px);
  color:rgba(255,255,255,0.86);
  margin:0 0 40px;
  line-height:2;
  opacity:0; animation:fadeIn 1s 1.1s ease-out forwards;
}
@keyframes fadeIn{ to{ opacity:1; } }

.hero-actions{
  display:flex; gap:16px; flex-wrap:wrap;
  opacity:0; animation:fadeIn 1s 1.4s ease-out forwards;
}

.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:14px 32px;
  font-size:14px; font-weight:500;
  letter-spacing:0.08em;
  border-radius:999px;
  transition:all .3s ease;
  border:1px solid transparent;
  cursor:pointer;
}
.btn-primary{
  background:var(--green-800); color:#fff;
}
.btn-primary:hover{ background:var(--green-900); transform:translateY(-1px); }
.btn-ghost{
  border-color:rgba(255,255,255,0.6); color:#fff;
}
.btn-ghost:hover{ background:#fff; color:var(--green-900); }
.btn-lg{ padding:18px 42px; font-size:15px; }

.hero-scroll{
  position:absolute; bottom:36px; left:50%; transform:translateX(-50%);
  color:rgba(255,255,255,0.7);
  font-family:var(--font-num);
  font-size:10px; letter-spacing:0.4em; text-transform:uppercase;
  display:flex; flex-direction:column; align-items:center; gap:10px;
}
.hero-scroll-line{
  width:1px; height:48px; background:rgba(255,255,255,0.4);
  position:relative; overflow:hidden;
}
.hero-scroll-line::after{
  content:""; position:absolute; top:-48px; left:0; right:0; height:48px;
  background:#fff;
  animation:scrollDown 2.2s ease-in-out infinite;
}
@keyframes scrollDown{
  0%{ top:-48px; }
  60%{ top:48px; }
  100%{ top:48px; }
}

/* =========================================================
   Metrics
   ========================================================= */
.metrics{
  background:var(--paper-2);
  border-bottom:0.5px solid var(--line);
  padding:50px 0;
}
.metrics-grid{
  display:grid;
  grid-template-columns:repeat(4, 1fr);
  gap:32px;
}
@media (max-width:900px){ .metrics-grid{ grid-template-columns:repeat(2, 1fr); gap:28px; } }
@media (max-width:480px){ .metrics-grid{ grid-template-columns:1fr; gap:24px; } }

.metric{
  text-align:left;
  padding:8px 0 8px 24px;
  border-left:1px solid var(--green-700);
}
.metric-num{
  font-family:var(--font-serif);
  font-size:48px; font-weight:500;
  color:var(--green-900);
  line-height:1.1;
  display:flex; align-items:baseline; gap:4px;
  margin-bottom:8px;
}
.metric-unit{ font-size:18px; color:var(--green-700); }
.metric-label{
  font-size:13px; color:var(--ink-mute);
  letter-spacing:0.04em;
}

/* =========================================================
   Sections
   ========================================================= */
.section{
  padding:var(--gap-section) 0;
}
@media (max-width:720px){ .section{ padding:40px 0; } }

.section-head{
  text-align:center;
  margin-bottom:40px;
}
.section-head.light .section-title,
.section-head.light .section-eyebrow{ color:#fff; }
.section-eyebrow{
  font-family:var(--font-num);
  font-size:11px; letter-spacing:0.4em; text-transform:uppercase;
  color:var(--green-700);
  margin:0 0 16px;
}
.section-title{
  font-family:var(--font-serif);
  font-size:clamp(32px, 4.5vw, 48px);
  font-weight:500;
  letter-spacing:0.06em;
  color:var(--ink);
  margin:0;
}
.section-title.light{ color:#fff; }
.section-divider{
  width:36px; height:1px;
  background:var(--green-800);
  margin:28px auto 0;
}
.section-head.light .section-divider{ background:#fff; }

/* Pillars */
/* 不動産投資：留白收紧 */
.section-invest{ padding:50px 0; }
.section-invest .section-head{ margin-bottom:36px; }

.pillar{
  display:grid;
  grid-template-columns:120px 1fr;
  gap:40px;
  padding:36px 0;
  border-top:0.5px solid var(--line);
}
.pillar:last-child{ border-bottom:0.5px solid var(--line); }
@media (max-width:720px){
  .pillar{ grid-template-columns:1fr; gap:20px; padding:28px 0; }
}
.pillar-num{
  font-family:var(--font-serif);
  font-size:48px; font-weight:500;
  color:var(--green-800);
  line-height:1;
  letter-spacing:0.04em;
}
.pillar-title{
  font-family:var(--font-serif);
  font-size:24px; font-weight:500;
  letter-spacing:0.04em;
  color:var(--ink);
  margin:0 0 20px;
}
.pillar-text{
  font-size:15px; line-height:2;
  color:var(--ink-soft);
  margin:0;
  max-width:680px;
}
.pillar-points{
  display:grid;
  grid-template-columns:repeat(2, 1fr);
  gap:32px;
  margin-top:24px;
}
@media (max-width:720px){ .pillar-points{ grid-template-columns:1fr; gap:24px; } }
.pillar-point{
  padding:24px;
  background:var(--paper-2);
  border:0.5px solid var(--line);
  border-radius:var(--radius-md);
}
.pillar-point h4{
  font-family:var(--font-serif);
  font-size:16px; font-weight:500;
  margin:0 0 12px;
  color:var(--green-900);
  letter-spacing:0.04em;
}
.pillar-point p{
  font-size:14px; color:var(--ink-mute);
  margin:0; line-height:1.85;
}

/* =========================================================
   Company
   ========================================================= */
.section-company{ background:var(--paper); padding:0; }
.company-hero{
  height:280px;
  background:var(--green-900);
  display:flex; align-items:center; justify-content:center;
  color:#fff;
  margin-bottom:0;
}
.company-hero-inner{
  position:relative; text-align:center; z-index:1;
  padding:0 24px;
}
.company-content{
  max-width:var(--c-narrow);
  padding-top:50px; padding-bottom:0;
}
.company-lead p{
  font-family:var(--font-serif);
  font-size:15px; line-height:2.2;
  color:var(--ink-soft);
  margin:0 0 28px;
  letter-spacing:0.04em;
}
.company-sign{
  margin-top:32px; text-align:right;
  padding-bottom:28px;
  border-bottom:0.5px solid var(--line);
}
.company-sign-label{
  font-size:13px; color:var(--ink-mute);
  margin:0 0 8px; letter-spacing:0.1em;
}
.company-sign-name{
  font-family:var(--font-serif);
  font-size:24px; font-weight:500;
  color:var(--green-900);
  margin:0; letter-spacing:0.2em;
}

/* =========================================================
   Services
   ========================================================= */
.section-services{ background:var(--paper); padding:50px 0; }
.section-services .section-head{ margin-bottom:36px; }
.services-grid{
  display:grid;
  grid-template-columns:repeat(2, 1fr);
  gap:36px;
}
@media (max-width:900px){ .services-grid{ grid-template-columns:1fr; gap:28px; } }
.service-card{
  padding:36px 32px;
  background:var(--paper-2);
  border:0.5px solid var(--line);
  border-radius:var(--radius-md);
  position:relative;
  transition:transform .4s, box-shadow .4s, border-color .4s;
}
.service-card:hover{
  transform:translateY(-4px);
  border-color:var(--green-700);
  box-shadow:0 12px 32px -16px rgba(46,125,50,0.18);
}
.service-num{
  font-family:var(--font-num);
  font-size:13px; color:var(--green-700);
  letter-spacing:0.3em;
  margin:0 0 20px;
}
.service-title{
  font-family:var(--font-serif);
  font-size:20px; font-weight:500;
  line-height:1.6;
  color:var(--ink);
  margin:0 0 20px;
  letter-spacing:0.04em;
}
.service-text{
  font-size:14px; line-height:2;
  color:var(--ink-mute);
  margin:0;
}

/* =========================================================
   Contact
   ========================================================= */
.section-contact{
  position:relative;
  color:#fff;
  overflow:hidden;
}
.contact-bg{
  position:absolute; inset:0;
  background-size:cover; background-position:center;
  z-index:0;
}
.section-contact::before{
  content:""; position:absolute; inset:0; z-index:0;
  background:linear-gradient(180deg, rgba(15,30,15,0.92) 0%, rgba(15,30,15,0.88) 100%);
}
.section-contact > .container{ position:relative; z-index:1; }
.contact-grid{
  display:grid;
  grid-template-columns:repeat(2, 1fr);
  gap:32px;
  max-width:920px; margin:0 auto;
}
@media (max-width:720px){ .contact-grid{ grid-template-columns:1fr; } }
.contact-card{
  display:flex;
  flex-direction:column;
  padding:40px 32px;
  background:rgba(255,255,255,0.04);
  border:0.5px solid rgba(255,255,255,0.18);
  border-radius:var(--radius-md);
  backdrop-filter:blur(8px);
  text-align:center;
}
.contact-eyebrow{
  font-family:var(--font-serif);
  font-size:15px; font-weight:500;
  margin:0 0 16px; color:#fff;
  letter-spacing:0.06em;
}
.contact-desc{
  flex:1;
  font-size:13px; line-height:1.9;
  color:rgba(255,255,255,0.7);
  margin:0 0 24px;
}
.contact-mail{
  display:inline-block;
  font-family:var(--font-num);
  font-size:18px; font-weight:500;
  color:#fff;
  padding:14px 28px;
  border:1px solid rgba(255,255,255,0.5);
  border-radius:999px;
  transition:background .3s, border-color .3s;
  letter-spacing:0.05em;
}
.contact-mail:hover{
  background:#fff; color:var(--green-900); border-color:#fff;
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer{
  background:var(--green-900);
  color:rgba(255,255,255,0.78);
  padding:50px 0 0;
}
.footer-inner{
  display:grid;
  grid-template-columns:1.2fr 1fr;
  gap:48px;
  padding-bottom:48px;
}
@media (max-width:720px){
  .footer-inner{ grid-template-columns:1fr; gap:32px; }
}
.footer-brand{ display:flex; flex-direction:column; align-items:flex-start; }
.footer-mark{
  width:56px; height:56px;
  background:rgba(255,255,255,0.92);
  border-radius:10px;
  padding:6px;
  object-fit:contain;
  margin-bottom:20px;
}
.footer-name{
  font-family:var(--font-serif);
  font-size:20px; font-weight:500;
  color:#fff; margin:0 0 16px;
  letter-spacing:0.06em;
}
.footer-addr, .footer-tel{
  font-size:13px; line-height:1.9;
  margin:0 0 12px;
  color:rgba(255,255,255,0.7);
}
.footer-license{
  font-size:12px; line-height:1.8;
  margin:0;
  padding-top:12px;
  border-top:0.5px solid rgba(255,255,255,0.16);
  color:rgba(255,255,255,0.62);
  letter-spacing:0.03em;
}
.footer-nav{
  display:flex; flex-direction:column;
  gap:12px; align-items:flex-start;
  /* 与左列「株式会社凌宇」文字对齐：logo 56px + logo下边距 20px = 76px，
     再补上 20px 社名行高(36px) 与 14px 导航行高(25px) 的差值一半 ≈ 5px */
  padding-top:81px;
}
@media (max-width:720px){
  .footer-nav{ align-items:flex-start; padding-top:0; }
}
.footer-nav a{
  font-size:14px; color:rgba(255,255,255,0.7);
  transition:color .2s;
  letter-spacing:0.05em;
}
.footer-nav a:hover{ color:#fff; }
.footer-copy{
  border-top:0.5px solid rgba(255,255,255,0.12);
  padding:24px 0; text-align:center;
}
.footer-copy p{
  font-family:var(--font-num);
  font-size:11px; color:rgba(255,255,255,0.5);
  margin:0; letter-spacing:0.1em;
}

/* =========================================================
   Works page
   ========================================================= */
.page-head{
  padding:120px 0 50px;
  background:var(--paper-3);
  border-bottom:0.5px solid var(--line);
  text-align:center;
}
.page-eyebrow{
  font-family:var(--font-num);
  font-size:11px; letter-spacing:0.4em; text-transform:uppercase;
  color:var(--green-700);
  margin:0 0 20px;
}
.page-title{
  font-family:var(--font-serif);
  font-size:clamp(36px, 5vw, 56px);
  font-weight:500;
  letter-spacing:0.08em;
  color:var(--ink);
  margin:0 0 28px;
}
.page-lead{
  font-size:15px; line-height:2.2;
  color:var(--ink-mute);
  max-width:640px; margin:0 auto;
}

.works-section{ padding:50px 0; }
.work{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
  align-items:center;
  padding:50px 0;
  border-top:0.5px solid var(--line);
}
.work:first-child{ border-top:0; padding-top:0; }
.work.reverse{ direction:rtl; }
.work.reverse > *{ direction:ltr; }
@media (max-width:900px){
  .work{ grid-template-columns:1fr; gap:32px; padding:48px 0; }
  .work.reverse{ direction:ltr; }
}
.work-image{
  position:relative;
  aspect-ratio:4/5;
  overflow:hidden;
  background:var(--paper-3);
  border-radius:var(--radius-md);
}
.work-image img{
  width:100%; height:100%; object-fit:cover;
  transition:transform 1.2s cubic-bezier(.2,.7,.2,1);
}
.work:hover .work-image img{ transform:scale(1.05); }
.work-num{
  font-family:var(--font-num);
  font-size:12px; color:var(--green-700);
  letter-spacing:0.3em; margin:0 0 12px;
}
.work-title{
  font-family:var(--font-serif);
  font-size:clamp(24px, 2.4vw, 32px);
  font-weight:500;
  color:var(--ink);
  letter-spacing:0.06em;
  margin:0 0 32px;
  padding-bottom:20px;
  border-bottom:1px solid var(--green-800);
  display:inline-block;
}
.work-spec{
  display:grid;
  grid-template-columns:auto 1fr;
  gap:14px 28px;
  margin:0;
  font-size:14px;
  line-height:1.85;
}
.work-spec dt{
  font-family:var(--font-sans);
  font-weight:500; color:var(--ink);
  letter-spacing:0.05em;
  white-space:nowrap;
}
.work-spec dd{
  margin:0; color:var(--ink-soft);
}

/* CTA */
.section-cta{
  background:var(--green-100);
  text-align:center;
  padding:50px 0;
}
.cta-title{
  font-family:var(--font-serif);
  font-size:clamp(28px, 3.6vw, 40px);
  font-weight:500;
  letter-spacing:0.06em;
  color:var(--green-900);
  margin:0 0 24px;
  line-height:1.6;
}
.cta-text{
  font-size:15px; color:var(--ink-soft);
  margin:0 0 40px;
}
.sp-only{ display:none; }
@media (max-width:720px){ .sp-only{ display:inline; } }

/* =========================================================
   Reveal animation
   ========================================================= */
.reveal{
  opacity:0;
  transform:translateY(28px);
  transition:opacity .9s ease, transform .9s ease;
}
.reveal.in{
  opacity:1;
  transform:translateY(0);
}

/* =========================================================
   Small screens
   ========================================================= */
@media (max-width:480px){
  .hero-title{ font-size:42px; }
  .metric-num{ font-size:36px; }
  .section-title{ font-size:30px; }
  .pillar-num{ font-size:36px; }
  .service-card{ padding:36px 24px; }
  .contact-card{ padding:32px 20px; }
}