:root {
  --main: #1A2332;
  --main-mid: #2C3E55;
  --accent: #7A8CA0;
  --accent-bright: #A8BED4;
  --bg: #F5F6F8;
  --bg-dark: #1A2332;
  --bg-card: #FFFFFF;
  --text: #1A2332;
  --text-muted: #5A6B7E;
  --border: #D8DDE4;
  --radius: 4px;
  --font-base: 'Noto Sans JP', sans-serif;
  --font-en: 'Inter', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-base);
  color: var(--text);
  background: var(--bg);
  line-height: 1.8;
  font-size: 15px;
}

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

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- Header ---- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(26, 35, 50, 0.97);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  backdrop-filter: blur(4px);
}

.header .container {
  display: flex;
  align-items: center;
  height: 64px;
  gap: 24px;
}

.logo {
  font-family: var(--font-en);
  font-weight: 600;
  font-size: 1.1rem;
  color: #fff;
  letter-spacing: 0.04em;
  flex-shrink: 0;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-left: auto;
}

.nav a {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
  font-weight: 400;
  transition: color 0.2s;
}

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

.nav-cta {
  background: rgba(255,255,255,0.1) !important;
  color: #fff !important;
  padding: 8px 20px;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius);
  font-size: 0.82rem !important;
  font-weight: 500 !important;
  transition: background 0.2s !important;
}

.nav-cta:hover { background: rgba(255,255,255,0.2) !important; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: auto;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: #fff;
  transition: all 0.3s;
}

/* ---- CTA Button ---- */
.cta-btn {
  display: inline-block;
  background: var(--main);
  color: #fff;
  padding: 14px 36px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.03em;
  transition: background 0.2s, transform 0.15s;
}

.cta-btn:hover {
  background: var(--main-mid);
  transform: translateY(-1px);
}

.cta-btn--lg {
  padding: 18px 52px;
  font-size: 1rem;
}

/* ---- Sections ---- */
.section { padding: 96px 0; }

.sec-label {
  font-family: var(--font-en);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.sec-label::after {
  content: '';
  display: block;
  width: 32px;
  height: 1px;
  background: var(--accent);
}

.sec-title {
  font-size: 1.9rem;
  font-weight: 700;
  color: var(--main);
  line-height: 1.3;
  margin-bottom: 16px;
}

.sec-desc {
  color: var(--text-muted);
  max-width: 640px;
  line-height: 1.9;
  margin-bottom: 56px;
}

/* ---- Hero ---- */
.hero {
  background: var(--bg-dark);
  padding: 120px 0 100px;
}

.hero-tag {
  font-family: var(--font-en);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--accent-bright);
  text-transform: uppercase;
  margin-bottom: 36px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.hero-tag::before {
  content: '';
  display: block;
  width: 20px;
  height: 1px;
  background: var(--accent-bright);
}

.hero-title {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin-bottom: 32px;
}

.hero-sub {
  font-size: 1rem;
  color: rgba(255,255,255,0.6);
  line-height: 1.9;
  max-width: 520px;
  margin-bottom: 52px;
}

.hero .cta-btn {
  background: #fff;
  color: var(--main);
}

.hero .cta-btn:hover {
  background: var(--bg);
}

/* ---- Problem ---- */
.problem { background: var(--bg-card); }

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  margin-top: 48px;
}

.problem-card {
  background: var(--bg-card);
  padding: 40px 32px;
}

.problem-num {
  font-family: var(--font-en);
  font-size: 2.2rem;
  font-weight: 300;
  color: var(--accent);
  opacity: 0.4;
  margin-bottom: 20px;
  line-height: 1;
}

.problem-card p:last-child { font-size: 0.92rem; color: var(--text-muted); font-weight: 500; line-height: 1.8; }

/* ---- Service ---- */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 36px 28px;
}

.service-icon {
  font-family: var(--font-en);
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--accent);
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.service-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--main);
}

.service-card p { font-size: 0.88rem; color: var(--text-muted); line-height: 1.85; }

/* ---- Program ---- */
.program { background: var(--bg-dark); }

.program .sec-label { color: var(--accent-bright); }
.program .sec-label::after { background: var(--accent-bright); }
.program .sec-title { color: #fff; }
.program .sec-desc { color: rgba(255,255,255,0.55); }

.program-list { display: flex; flex-direction: column; margin-top: 48px; }

.program-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 40px;
  padding: 36px 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  align-items: start;
}

.program-item:first-child { border-top: 1px solid rgba(255,255,255,0.08); }

.program-step {
  font-family: var(--font-en);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--accent-bright);
  padding-top: 4px;
}

.program-content h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: #fff;
}

.program-content p { font-size: 0.88rem; color: rgba(255,255,255,0.55); line-height: 1.85; }

/* ---- Target ---- */
.target-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.target-card {
  border: 1px solid var(--border);
  padding: 32px 28px;
}

.target-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--main);
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--main);
}

.target-card p { font-size: 0.88rem; color: var(--text-muted); line-height: 1.85; }

/* ---- Price ---- */
.price { background: var(--bg-card); }

.price-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 48px;
  max-width: 760px;
}

.price-card {
  border: 1px solid var(--border);
  padding: 40px 36px;
  background: var(--bg);
}

.price-card--main {
  background: var(--main);
  border-color: var(--main);
  color: #fff;
}

.price-tag {
  font-family: var(--font-en);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 20px;
  color: var(--accent);
}

.price-card--main .price-tag { color: var(--accent-bright); }

.price-num {
  font-family: var(--font-en);
  font-size: 2.2rem;
  font-weight: 600;
  color: var(--main);
  margin-bottom: 4px;
}

.price-card--main .price-num { color: #fff; }
.price-num span { font-size: 1.2rem; font-weight: 300; }

.price-note { font-size: 0.78rem; color: var(--text-muted); margin-bottom: 28px; }
.price-card--main .price-note { color: rgba(255,255,255,0.55); }

.price-list { list-style: none; margin-bottom: 36px; display: flex; flex-direction: column; gap: 12px; }

.price-list li {
  font-size: 0.87rem;
  color: var(--text-muted);
  padding-left: 20px;
  position: relative;
}

.price-card--main .price-list li { color: rgba(255,255,255,0.7); }

.price-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 11px;
  width: 10px;
  height: 1px;
  background: var(--accent);
}

.price-card--main .cta-btn { background: #fff; color: var(--main); }
.price-card--main .cta-btn:hover { background: var(--bg); }

/* ---- FAQ ---- */
.faq { background: var(--bg); }

.faq-list { margin-top: 48px; }

.faq-item { border-bottom: 1px solid var(--border); }
.faq-item:first-child { border-top: 1px solid var(--border); }

.faq-q {
  width: 100%;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  padding: 24px 0;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--main);
  font-family: var(--font-base);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.faq-q::after {
  content: '+';
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--accent);
  flex-shrink: 0;
  font-family: var(--font-en);
  transition: transform 0.3s;
}

.faq-q[aria-expanded="true"]::after { transform: rotate(45deg); }

.faq-a { display: none; padding-bottom: 24px; }
.faq-a.open { display: block; }
.faq-a p { font-size: 0.88rem; color: var(--text-muted); line-height: 1.9; }

/* ---- CTA Section ---- */
.cta-section {
  background: var(--bg-dark);
  text-align: center;
  padding: 100px 0;
}

.cta-title {
  font-size: 2rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}

.cta-sub {
  font-size: 0.92rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: 48px;
}

.cta-section .cta-btn { background: #fff; color: var(--main); }
.cta-section .cta-btn:hover { background: var(--bg); }

/* ---- Footer ---- */
.footer {
  background: #111820;
  padding: 40px 0 28px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.footer-logo {
  font-family: var(--font-en);
  font-size: 0.95rem;
  font-weight: 600;
  color: rgba(255,255,255,0.7);
}

.footer-sns { display: flex; gap: 16px; }

.footer-sns img {
  width: 18px;
  height: 18px;
  filter: invert(1) opacity(0.55);
  transition: opacity 0.2s;
}

.footer-sns a:hover img { opacity: 1; }

.footer-copy {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.3);
  text-align: center;
}

/* ---- Reveal ---- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible { opacity: 1; transform: translateY(0); }

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .nav {
    display: none;
    flex-direction: column;
    position: fixed;
    inset: 64px 0 0 0;
    background: var(--main);
    padding: 32px 24px;
    gap: 20px;
    z-index: 99;
  }

  .nav.open { display: flex; }
  .nav a { font-size: 1rem; }
  .hamburger { display: flex; }

  .section { padding: 64px 0; }
  .hero { padding: 80px 0 64px; }

  .problem-grid,
  .service-grid,
  .target-grid { grid-template-columns: 1fr; gap: 0; }

  .problem-grid { background: none; border: none; }
  .problem-card { border: 1px solid var(--border); margin-bottom: 1px; }

  .price-grid { grid-template-columns: 1fr; }
  .program-item { grid-template-columns: 1fr; gap: 8px; }
  .sec-title { font-size: 1.5rem; }
}