/* ============================================
   RION株式会社 渡邊造園 サンプルLP
   Brand: Dark Forest Green × Sage × Gold
============================================ */

:root {
  --green-deep: #2C4A2E;
  --green-darker: #1A2A1C;
  --green-mid: #6B8E5A;
  --green-pale: #B8C9A8;
  --gold: #C9A050;
  --gold-pale: #E8D5A8;
  --bg: #F8F6F0;
  --bg-soft: #EFEBE0;
  --text: #1A2A1C;
  --text-mid: #4A5A4C;
  --text-light: #8A958A;
  --line: #DDD8C8;
  --serif: 'Noto Serif JP', serif;
  --sans: 'Noto Sans JP', sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.8;
  font-size: 16px;
  font-weight: 400;
  letter-spacing: 0.02em;
  padding-bottom: 56px; /* sample banner */
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }

/* ============== Header ============== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(248, 246, 240, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  max-width: 1280px; margin: 0 auto;
  padding: 16px clamp(20px, 4vw, 48px);
  display: flex; align-items: center; gap: clamp(16px, 3vw, 40px);
}
.brand {
  display: flex; flex-direction: column; line-height: 1.2;
}
.brand-jp {
  font-family: var(--serif); font-weight: 700;
  font-size: 22px; color: var(--green-deep); letter-spacing: 0.06em;
}
.brand-en {
  font-size: 10px; color: var(--text-light);
  letter-spacing: 0.18em; text-transform: uppercase; margin-top: 2px;
}
.header-nav {
  display: flex; gap: clamp(12px, 2vw, 28px);
  margin-left: auto; font-size: 14px; font-weight: 500;
}
.header-nav a { color: var(--text-mid); transition: color .2s; }
.header-nav a:hover { color: var(--green-deep); }
.header-cta {
  background: var(--green-deep); color: #fff;
  padding: 10px 20px; border-radius: 4px;
  font-size: 13px; font-weight: 600; letter-spacing: 0.04em;
  transition: background .2s;
}
.header-cta:hover { background: var(--green-darker); }

@media (max-width: 920px) {
  .header-nav { display: none; }
}

/* ============== Hero ============== */
.hero {
  position: relative; min-height: 88vh;
  display: flex; align-items: center;
  margin-top: 72px;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
}
.hero-bg img {
  width: 100%; height: 100%; object-fit: cover;
  object-position: center 40%;
}
.hero-overlay {
  position: absolute; inset: 0;
  background:
    linear-gradient(105deg,
      rgba(26, 42, 28, 0.78) 0%,
      rgba(26, 42, 28, 0.55) 38%,
      rgba(26, 42, 28, 0.15) 65%,
      rgba(26, 42, 28, 0.05) 100%);
}
.hero-inner {
  position: relative; z-index: 1;
  max-width: 1280px; margin: 0 auto;
  padding: 80px clamp(24px, 5vw, 80px);
  width: 100%;
  color: #fff;
}
.hero-eyebrow {
  font-family: var(--serif);
  font-size: clamp(14px, 1.5vw, 18px);
  letter-spacing: 0.18em;
  color: var(--gold-pale);
  margin-bottom: 18px;
}
.hero-h1 {
  font-family: var(--serif); font-weight: 700;
  font-size: clamp(28px, 4.2vw, 56px);
  line-height: 1.4;
  letter-spacing: 0.04em;
  margin-bottom: 28px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.3);
}
.hero-sub {
  font-size: clamp(15px, 1.5vw, 19px);
  font-weight: 500;
  line-height: 1.85;
  margin-bottom: 40px;
  max-width: 540px;
  text-shadow: 0 1px 6px rgba(0,0,0,0.3);
}
.hero-cta {
  display: inline-block;
  background: var(--gold); color: var(--green-darker);
  padding: 18px 36px; border-radius: 4px;
  font-weight: 700; letter-spacing: 0.06em;
  font-size: clamp(14px, 1.3vw, 16px);
  transition: transform .2s, box-shadow .2s;
  box-shadow: 0 6px 20px rgba(201, 160, 80, 0.35);
}
.hero-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(201, 160, 80, 0.45);
}
.hero-note {
  margin-top: 28px;
  font-size: 12px; color: var(--gold-pale);
  letter-spacing: 0.08em;
}

@media (max-width: 768px) {
  .hero { min-height: 76vh; margin-top: 64px; }
  .hero-overlay {
    background: linear-gradient(180deg, rgba(26,42,28,0.55) 0%, rgba(26,42,28,0.78) 60%);
  }
  .hero-inner { padding: 60px 24px; }
}

/* ============== Stats ============== */
.stats {
  background: var(--green-deep); color: #fff;
  padding: 56px clamp(20px, 4vw, 48px);
}
.stats-inner {
  max-width: 1080px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: clamp(16px, 3vw, 40px);
  text-align: center;
}
.stat {
  position: relative;
  padding: 0 12px;
}
.stat:not(:last-child)::after {
  content: ''; position: absolute; right: 0; top: 50%;
  transform: translateY(-50%);
  width: 1px; height: 60%; background: rgba(201, 160, 80, 0.3);
}
.stat-num {
  font-family: var(--serif); font-weight: 700;
  font-size: clamp(32px, 4vw, 52px);
  color: var(--gold);
  line-height: 1.1; margin-bottom: 8px;
  letter-spacing: 0.02em;
}
.stat-unit {
  font-size: 0.5em; margin-left: 4px;
  color: var(--gold-pale);
}
.stat-label {
  font-size: 12px; letter-spacing: 0.16em;
  color: var(--gold-pale);
}

@media (max-width: 720px) {
  .stats { padding: 40px 20px; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); gap: 28px 16px; }
  .stat:not(:last-child)::after { display: none; }
  .stat:nth-child(odd)::after {
    content: ''; position: absolute; right: 0; top: 50%;
    transform: translateY(-50%);
    width: 1px; height: 60%; background: rgba(201, 160, 80, 0.3);
    display: block;
  }
}

/* ============== Section commons ============== */
section { padding: clamp(60px, 8vw, 120px) clamp(20px, 4vw, 48px); }
.section-eyebrow {
  font-family: var(--serif);
  font-size: 13px; letter-spacing: 0.24em;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.section-h2 {
  font-family: var(--serif); font-weight: 700;
  font-size: clamp(24px, 3vw, 38px);
  line-height: 1.55;
  color: var(--green-darker);
  margin-bottom: 24px;
  letter-spacing: 0.04em;
}
.section-lead {
  font-size: clamp(14px, 1.3vw, 16px);
  color: var(--text-mid);
  max-width: 720px;
  margin-bottom: 48px;
  line-height: 2;
}

/* ============== About ============== */
.about { background: var(--bg-soft); }
.about-inner {
  max-width: 1080px; margin: 0 auto;
  display: grid; grid-template-columns: 320px 1fr;
  gap: clamp(32px, 5vw, 80px);
  align-items: start;
}
.about-photo { text-align: center; }
.photo-placeholder {
  width: 100%; aspect-ratio: 4 / 5;
  background: linear-gradient(135deg, var(--green-pale), var(--bg));
  border: 1px dashed var(--green-mid);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px; border-radius: 4px;
}
.placeholder-label {
  font-family: var(--serif); font-size: 13px;
  color: var(--green-mid); text-align: center;
  letter-spacing: 0.12em;
}
.photo-caption {
  font-family: var(--serif);
  font-size: 14px; color: var(--text-mid);
  letter-spacing: 0.06em;
}
.about-text p {
  margin-bottom: 24px;
  font-size: 15px; line-height: 2;
  color: var(--text-mid);
}
.about-text p:last-child { margin-bottom: 0; }

@media (max-width: 720px) {
  .about-inner { grid-template-columns: 1fr; }
  .about-photo { max-width: 240px; margin: 0 auto; }
}

/* ============== Services ============== */
.services { background: var(--bg); text-align: center; }
.services-inner { max-width: 1200px; margin: 0 auto; }
.services-inner .section-lead { margin: 0 auto 56px; text-align: center; }
.services-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: clamp(16px, 2vw, 24px);
  text-align: left;
}
.service-card {
  background: #fff;
  border-radius: 6px; overflow: hidden;
  box-shadow: 0 4px 16px rgba(26, 42, 28, 0.06);
  transition: transform .25s, box-shadow .25s;
}
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(26, 42, 28, 0.12);
}
.service-card img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.service-card h3 {
  font-family: var(--serif); font-weight: 600;
  font-size: 17px;
  padding: 20px 20px 8px;
  color: var(--green-darker);
  letter-spacing: 0.04em;
  line-height: 1.5;
}
.service-card p {
  padding: 0 20px 24px;
  font-size: 13px; line-height: 1.85;
  color: var(--text-mid);
}

@media (max-width: 980px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 540px) {
  .services-grid { grid-template-columns: 1fr; }
}

/* ============== Cases ============== */
.cases { background: var(--bg-soft); }
.cases-inner { max-width: 1200px; margin: 0 auto; }
.cases-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: clamp(20px, 2.5vw, 32px);
}
.case-card {
  background: #fff; border-radius: 6px; overflow: hidden;
  box-shadow: 0 4px 16px rgba(26, 42, 28, 0.06);
}
.case-card img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.case-meta {
  padding: 20px 24px 0;
  display: flex; gap: 12px; flex-wrap: wrap;
}
.case-area {
  font-size: 12px; font-weight: 600;
  color: var(--green-deep);
  background: var(--green-pale); padding: 4px 10px;
  border-radius: 3px; letter-spacing: 0.04em;
}
.case-type {
  font-size: 12px; font-weight: 600;
  color: var(--gold);
  background: var(--gold-pale); padding: 4px 10px;
  border-radius: 3px; letter-spacing: 0.04em;
}
.case-card p {
  padding: 14px 24px 24px;
  font-size: 14px; line-height: 1.85;
  color: var(--text-mid);
}

@media (max-width: 880px) {
  .cases-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
}

/* ============== Voices ============== */
.voices { background: var(--bg); }
.voices-inner { max-width: 1080px; margin: 0 auto; }
.voices-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: clamp(20px, 2.5vw, 28px);
}
.voice-card {
  background: var(--bg-soft);
  border-left: 3px solid var(--gold);
  padding: 28px 24px;
  border-radius: 0 6px 6px 0;
}
.voice-stars {
  color: var(--gold); font-size: 16px;
  letter-spacing: 0.18em; margin-bottom: 14px;
}
.voice-card p {
  font-size: 14px; line-height: 1.95;
  color: var(--text);
  margin-bottom: 16px;
}
.voice-meta {
  font-size: 12px; color: var(--text-light);
  letter-spacing: 0.08em;
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

@media (max-width: 880px) {
  .voices-grid { grid-template-columns: 1fr; }
}

/* ============== Area ============== */
.area { background: var(--bg-soft); text-align: center; }
.area-inner { max-width: 880px; margin: 0 auto; }
.area-inner .section-lead { margin: 0 auto 40px; }
.area-map {
  margin: 0 auto;
  background: #fff;
  border-radius: 8px;
  padding: 20px;
  box-shadow: 0 4px 20px rgba(26, 42, 28, 0.08);
  max-width: 600px;
}

/* ============== Flow ============== */
.flow { background: var(--green-deep); color: #fff; text-align: center; }
.flow-inner { max-width: 1240px; margin: 0 auto; }
.flow .section-eyebrow { color: var(--gold-pale); }
.flow .section-h2 { color: #fff; }
.flow-steps {
  display: grid; grid-template-columns: repeat(5, 1fr);
  gap: clamp(12px, 1.5vw, 20px);
  text-align: left; margin-top: 56px;
}
.flow-step {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(201, 160, 80, 0.18);
  border-radius: 6px; overflow: hidden;
}
.flow-step img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.flow-num {
  font-family: var(--serif);
  font-size: 11px; letter-spacing: 0.24em;
  color: var(--gold);
  padding: 16px 18px 0;
}
.flow-step h3 {
  font-family: var(--serif); font-weight: 600;
  font-size: 15px;
  padding: 6px 18px 10px;
  color: #fff;
  letter-spacing: 0.04em;
}
.flow-step p {
  padding: 0 18px 20px;
  font-size: 12.5px; line-height: 1.85;
  color: rgba(255,255,255,0.78);
}

@media (max-width: 1080px) {
  .flow-steps { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 540px) {
  .flow-steps { grid-template-columns: 1fr; }
}

/* ============== FAQ ============== */
.faq { background: var(--bg); }
.faq-inner { max-width: 880px; margin: 0 auto; }
.faq .section-h2 {
  font-size: clamp(28px, 3.4vw, 42px);
  letter-spacing: 0.18em;
  margin-bottom: 40px;
}
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: #fff; border: 1px solid var(--line);
  border-radius: 6px; overflow: hidden;
  transition: border-color .2s;
}
.faq-item[open] { border-color: var(--green-mid); }
.faq-item summary {
  cursor: pointer; padding: 22px 28px;
  font-weight: 600; font-size: 15px;
  color: var(--green-darker);
  list-style: none;
  position: relative;
  padding-right: 56px;
  letter-spacing: 0.04em;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+'; position: absolute;
  right: 24px; top: 50%; transform: translateY(-50%);
  font-size: 22px; color: var(--gold);
  font-weight: 300;
  transition: transform .2s;
}
.faq-item[open] summary::after { content: '−'; }
.faq-item p {
  padding: 0 28px 24px;
  font-size: 14px; line-height: 1.95;
  color: var(--text-mid);
}

/* ============== Contact ============== */
.contact { background: var(--bg-soft); text-align: center; }
.contact-inner { max-width: 880px; margin: 0 auto; }
.contact-lead {
  font-size: clamp(14px, 1.3vw, 16px);
  color: var(--text-mid);
  margin-bottom: 36px; line-height: 2;
}
.contact-cta {
  display: inline-block;
  background: var(--green-deep); color: #fff;
  padding: 22px 56px; border-radius: 4px;
  font-weight: 700; letter-spacing: 0.08em;
  font-size: 16px;
  box-shadow: 0 6px 20px rgba(44, 74, 46, 0.25);
  transition: transform .2s, box-shadow .2s;
}
.contact-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(44, 74, 46, 0.35);
}
.company-info {
  margin-top: 80px;
  padding: 36px 32px;
  background: #fff;
  border-radius: 6px;
  text-align: left;
  box-shadow: 0 2px 12px rgba(26, 42, 28, 0.06);
}
.company-info h3 {
  font-family: var(--serif); font-weight: 600;
  font-size: 17px;
  color: var(--green-darker);
  border-bottom: 2px solid var(--gold);
  padding-bottom: 10px;
  margin-bottom: 24px;
  letter-spacing: 0.06em;
}
.company-info dl {
  display: grid; grid-template-columns: 120px 1fr;
  gap: 12px 20px;
  font-size: 13.5px; line-height: 1.85;
}
.company-info dt {
  font-weight: 600; color: var(--green-deep);
  letter-spacing: 0.04em;
}
.company-info dd { color: var(--text-mid); }

@media (max-width: 540px) {
  .company-info dl { grid-template-columns: 1fr; gap: 4px 0; }
  .company-info dd { margin-bottom: 12px; }
}

/* ============== Footer ============== */
.site-footer {
  background: var(--green-darker); color: rgba(255,255,255,0.6);
  padding: 40px clamp(20px, 4vw, 48px) 32px;
}
.footer-inner {
  max-width: 1280px; margin: 0 auto;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 16px;
}
.footer-brand .brand-jp {
  color: #fff; font-size: 18px;
}
.footer-brand .brand-en {
  color: var(--gold-pale);
}
.footer-copy {
  font-size: 11px; letter-spacing: 0.08em;
}