/* ===========================
   ホテル会計ラボ - メインスタイル
   =========================== */

/* --- リセット・基本 --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-primary:   #1A2744;
  --color-accent:    #C9A84C;
  --color-accent-dark: #A8893A;
  --color-bg:        #FFFFFF;
  --color-bg-sub:    #F5F6F8;
  --color-text:      #2D2D2D;
  --color-text-sub:  #6B7280;
  --color-border:    #E5E7EB;
  --font-main:       'Noto Sans JP', sans-serif;
  --shadow-sm:       0 2px 8px rgba(0,0,0,.08);
  --shadow-md:       0 4px 20px rgba(0,0,0,.12);
  --radius:          8px;
  --transition:      0.3s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-main);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
  font-size: 16px;
}

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

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 96px 0;
}

.section--gray {
  background: var(--color-bg-sub);
}

.section__label {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.section__title {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.4;
  margin-bottom: 16px;
}

.section__desc {
  font-size: 16px;
  color: var(--color-text-sub);
  max-width: 600px;
}

.section__header {
  margin-bottom: 56px;
}

.section__header--center {
  text-align: center;
}

.section__header--center .section__desc {
  margin: 0 auto;
}

/* --- ボタン --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-primary);
  border-color: var(--color-accent);
}

.btn--primary:hover {
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn--outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,.6);
}

.btn--outline:hover {
  background: rgba(255,255,255,.1);
  border-color: #fff;
}

.btn--outline-dark {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn--outline-dark:hover {
  background: var(--color-primary);
  color: #fff;
}

/* ===========================
   ヘッダー
   =========================== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(26,39,68,.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255,255,255,.08);
  transition: var(--transition);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.header__logo {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.header__logo-main {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  letter-spacing: .05em;
}

.header__logo-sub {
  font-size: 10px;
  color: var(--color-accent);
  letter-spacing: .1em;
  text-transform: uppercase;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.header__nav a {
  color: rgba(255,255,255,.8);
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

.header__nav a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--color-accent);
  transition: var(--transition);
}

.header__nav a:hover {
  color: #fff;
}

.header__nav a:hover::after {
  width: 100%;
}

.header__cta .btn {
  padding: 10px 22px;
  font-size: 14px;
}

/* ===========================
   ヒーロー
   =========================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--color-primary);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(26,39,68,.95) 0%, rgba(26,39,68,.8) 100%),
    url('https://images.unsplash.com/photo-1542314831-068cd1dbfeeb?w=1600&q=80') center/cover no-repeat;
}

.hero__deco {
  position: absolute;
  top: -200px; right: -200px;
  width: 700px; height: 700px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(201,168,76,.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 1;
  max-width: 680px;
  padding: 120px 24px 80px;
}

.hero__tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(201,168,76,.15);
  border: 1px solid rgba(201,168,76,.4);
  border-radius: 100px;
  padding: 6px 16px;
  font-size: 13px;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 28px;
  letter-spacing: .05em;
}

.hero__title {
  font-size: 52px;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
  margin-bottom: 24px;
  letter-spacing: -.01em;
}

.hero__title span {
  color: var(--color-accent);
}

.hero__desc {
  font-size: 17px;
  color: rgba(255,255,255,.75);
  line-height: 1.9;
  margin-bottom: 40px;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero__scroll {
  position: absolute;
  bottom: 40px; left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,.4);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  animation: bounce 2s infinite;
}

.hero__scroll::after {
  content: '';
  display: block;
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, rgba(255,255,255,.4), transparent);
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

/* ===========================
   課題提起
   =========================== */
.problems__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.problem-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 40px 32px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.problem-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
}

.problem-card__icon {
  font-size: 36px;
  margin-bottom: 20px;
}

.problem-card__title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.problem-card__desc {
  font-size: 14px;
  color: var(--color-text-sub);
  line-height: 1.8;
}

/* ===========================
   サービス概要
   =========================== */
.services__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.service-card {
  background: var(--color-primary);
  border-radius: 16px;
  padding: 48px 40px;
  color: #fff;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(26,39,68,.4);
}

.service-card::before {
  content: '';
  position: absolute;
  top: -60px; right: -60px;
  width: 200px; height: 200px;
  border-radius: 50%;
  background: rgba(201,168,76,.08);
}

.service-card__badge {
  display: inline-block;
  background: rgba(201,168,76,.2);
  color: var(--color-accent);
  border: 1px solid rgba(201,168,76,.4);
  border-radius: 4px;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  margin-bottom: 20px;
}

.service-card__title {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.3;
}

.service-card__desc {
  font-size: 15px;
  color: rgba(255,255,255,.75);
  line-height: 1.8;
  margin-bottom: 32px;
}

.service-card__features {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 36px;
}

.service-card__feature {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: rgba(255,255,255,.85);
}

.service-card__feature::before {
  content: '';
  display: block;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--color-accent);
  flex-shrink: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%231A2744'%3E%3Cpath fill-rule='evenodd' d='M16.707 5.293a1 1 0 010 1.414l-8 8a1 1 0 01-1.414 0l-4-4a1 1 0 011.414-1.414L8 12.586l7.293-7.293a1 1 0 011.414 0z' clip-rule='evenodd'/%3E%3C/svg%3E");
  background-size: 12px;
  background-repeat: no-repeat;
  background-position: center;
}

.service-card .btn--primary {
  align-self: flex-start;
}

/* ===========================
   選ばれる理由
   =========================== */
.reasons__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.reason-card {
  text-align: center;
  padding: 40px 28px;
}

.reason-card__number {
  font-size: 56px;
  font-weight: 700;
  color: var(--color-accent);
  opacity: .3;
  line-height: 1;
  margin-bottom: 16px;
  font-family: Georgia, serif;
}

.reason-card__title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.reason-card__desc {
  font-size: 14px;
  color: var(--color-text-sub);
  line-height: 1.8;
}

/* ===========================
   導入の流れ
   =========================== */
.flow__steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}

.flow__steps::before {
  content: '';
  position: absolute;
  top: 40px; left: calc(12.5% + 16px);
  right: calc(12.5% + 16px);
  height: 2px;
  background: linear-gradient(to right, var(--color-accent), var(--color-accent));
  background-size: calc(100% / 3) 100%;
  background-repeat: repeat-x;
}

.flow-step {
  text-align: center;
  padding: 0 16px;
  position: relative;
  z-index: 1;
}

.flow-step__circle {
  width: 80px; height: 80px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  font-size: 28px;
}

.flow-step__num {
  position: absolute;
  top: -8px; right: calc(50% - 52px);
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-primary);
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.flow-step__title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.flow-step__desc {
  font-size: 13px;
  color: var(--color-text-sub);
  line-height: 1.7;
}

/* ===========================
   実績数字
   =========================== */
.stats {
  background: var(--color-primary);
  padding: 80px 0;
}

.stats__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}

.stat-item {
  text-align: center;
  padding: 20px 32px;
  border-right: 1px solid rgba(255,255,255,.1);
}

.stat-item:last-child {
  border-right: none;
}

.stat-item__num {
  font-size: 56px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 8px;
  font-family: Georgia, serif;
}

.stat-item__num sup {
  font-size: 28px;
  vertical-align: super;
}

.stat-item__label {
  font-size: 15px;
  color: rgba(255,255,255,.7);
}

/* ===========================
   ブログ
   =========================== */
.blog__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 48px;
}

.blog-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.blog-card__thumb {
  height: 180px;
  background: var(--color-bg-sub);
  overflow: hidden;
}

.blog-card__thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.blog-card:hover .blog-card__thumb img {
  transform: scale(1.05);
}

.blog-card__body {
  padding: 24px;
}

.blog-card__cat {
  display: inline-block;
  background: rgba(201,168,76,.12);
  color: var(--color-accent-dark);
  font-size: 12px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 4px;
  margin-bottom: 10px;
}

.blog-card__title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.6;
  margin-bottom: 8px;
}

.blog-card__date {
  font-size: 12px;
  color: var(--color-text-sub);
}

.blog__cta {
  text-align: center;
}

/* ===========================
   CTA バナー
   =========================== */
.cta-banner {
  background: var(--color-primary);
  padding: 96px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -150px; left: -150px;
  width: 500px; height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(201,168,76,.1) 0%, transparent 70%);
}

.cta-banner::after {
  content: '';
  position: absolute;
  bottom: -150px; right: -150px;
  width: 500px; height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(201,168,76,.08) 0%, transparent 70%);
}

.cta-banner__inner {
  position: relative;
  z-index: 1;
}

.cta-banner__title {
  font-size: 36px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  line-height: 1.4;
}

.cta-banner__desc {
  font-size: 16px;
  color: rgba(255,255,255,.7);
  margin-bottom: 40px;
}

.cta-banner__actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===========================
   フッター
   =========================== */
.footer {
  background: #0F1929;
  color: rgba(255,255,255,.6);
  padding: 64px 0 32px;
}

.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer__brand-name {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}

.footer__brand-sub {
  font-size: 11px;
  color: var(--color-accent);
  letter-spacing: .1em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.footer__brand-desc {
  font-size: 13px;
  line-height: 1.8;
}

.footer__col-title {
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  letter-spacing: .05em;
  margin-bottom: 20px;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer__links a {
  font-size: 13px;
  color: rgba(255,255,255,.55);
  transition: var(--transition);
}

.footer__links a:hover {
  color: var(--color-accent);
}

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
}

.footer__bottom-links {
  display: flex;
  gap: 24px;
}

.footer__bottom-links a {
  color: rgba(255,255,255,.4);
  transition: var(--transition);
}

.footer__bottom-links a:hover {
  color: rgba(255,255,255,.7);
}

/* ===========================
   フェードインアニメーション
   =========================== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }