/* =====================
   Under Construction
   ===================== */
.under-construction {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  background: repeating-linear-gradient(
    -45deg,
    #f59e0b,
    #f59e0b 20px,
    #1a1a1a 20px,
    #1a1a1a 40px
  );
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 14px 24px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
}

.uc-text {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: clamp(28px, 5vw, 52px);
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.25em;
  text-shadow:
    0 0 20px rgba(245,158,11,0.8),
    2px 2px 0 #1a1a1a;
  animation: uc-blink 1.6s ease-in-out infinite;
}

.uc-icon {
  font-size: clamp(24px, 4vw, 44px);
  animation: uc-shake 0.8s ease-in-out infinite alternate;
}

@keyframes uc-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

@keyframes uc-shake {
  from { transform: rotate(-8deg); }
  to   { transform: rotate(8deg); }
}

/* =====================
   Reset & Base
   ===================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-primary: #0057ff;
  --color-primary-dark: #0040cc;
  --color-accent: #00c6ff;
  --color-bg: #f8faff;
  --color-surface: #ffffff;
  --color-text: #1a1a2e;
  --color-text-muted: #6b7280;
  --color-border: #e5e7f0;
  --color-dark: #0d1117;

  --font: 'Noto Sans JP', sans-serif;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0, 87, 255, 0.08);
  --shadow-lg: 0 12px 48px rgba(0, 87, 255, 0.15);

  --header-h: 72px;
  --uc-h: 72px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  font-size: 16px;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

/* =====================
   Utilities
   ===================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

.section__header {
  text-align: center;
  margin-bottom: 64px;
}

.section__label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--color-primary);
  margin-bottom: 12px;
  text-transform: uppercase;
}

.section__title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 16px;
}

.section__title--left {
  text-align: left;
}

.section__desc {
  font-size: 17px;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* =====================
   Buttons
   ===================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 16px;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  border: none;
  transition: all 0.25s ease;
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 4px 20px rgba(0, 87, 255, 0.35);
}

.btn--primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0, 87, 255, 0.45);
}

.btn--ghost {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn--ghost:hover {
  background: rgba(0, 87, 255, 0.06);
  transform: translateY(-2px);
}

.btn--full {
  width: 100%;
}

/* =====================
   Header
   ===================== */
.header {
  position: fixed;
  top: var(--uc-h);
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  background: rgba(248, 250, 255, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow 0.3s ease;
}

.header.scrolled {
  box-shadow: var(--shadow);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 22px;
  font-weight: 700;
}

.logo-icon {
  font-size: 26px;
  animation: spin-slow 8s linear infinite;
}

@keyframes spin-slow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.logo-accent {
  color: var(--color-primary);
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav__link {
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  transition: all 0.2s;
}

.nav__link:hover {
  background: rgba(0, 87, 255, 0.08);
  color: var(--color-primary);
}

.nav__link--cta {
  background: var(--color-primary);
  color: #fff !important;
  padding: 10px 24px;
  border-radius: 50px;
  margin-left: 8px;
}

.nav__link--cta:hover {
  background: var(--color-primary-dark) !important;
  transform: translateY(-1px);
}

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

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all 0.3s;
}

/* =====================
   Hero
   ===================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--header-h) + var(--uc-h));
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #f0f4ff 0%, #e8f0fe 50%, #f5e6ff 100%);
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 87, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 87, 255, 0.06) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 40%, transparent 100%);
}

.hero__content {
  position: relative;
  z-index: 1;
  padding: 80px 24px;
  max-width: 800px;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.1em;
  margin-bottom: 20px;
  padding: 6px 16px;
  background: rgba(0, 87, 255, 0.08);
  border-radius: 50px;
  border: 1px solid rgba(0, 87, 255, 0.15);
}

.hero__eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--color-primary);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero__title {
  font-size: clamp(36px, 6vw, 68px);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 24px;
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__desc {
  font-size: 18px;
  color: var(--color-text-muted);
  margin-bottom: 40px;
  line-height: 1.8;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

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

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat__num {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1;
}

.stat__plus, .stat__pct, .stat__unit {
  font-size: 20px;
  color: var(--color-primary);
}

.stat__label {
  font-size: 13px;
  color: var(--color-text-muted);
  font-weight: 500;
}

.stat__divider {
  width: 1px;
  height: 48px;
  background: var(--color-border);
}

.hero__scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
}

.hero__scroll-line {
  display: block;
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--color-primary), transparent);
  animation: scroll-line 2s ease-in-out infinite;
}

@keyframes scroll-line {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* =====================
   Services
   ===================== */
.services {
  background: var(--color-surface);
}

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

.service-card {
  position: relative;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: all 0.3s ease;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 87, 255, 0.2);
}

.service-card--featured {
  background: linear-gradient(135deg, var(--color-primary) 0%, #0040cc 100%);
  border-color: transparent;
  color: #fff;
}

.service-card--featured:hover {
  box-shadow: 0 16px 48px rgba(0, 87, 255, 0.4);
}

.service-card__badge {
  position: absolute;
  top: -12px;
  left: 24px;
  background: #ff6b35;
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 50px;
}

.service-card__icon {
  font-size: 36px;
  margin-bottom: 16px;
}

.service-card__title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}

.service-card__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

.service-card--featured .service-card__desc {
  color: rgba(255, 255, 255, 0.8);
}

.service-card__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.service-card__list li {
  font-size: 13px;
  padding-left: 16px;
  position: relative;
  color: var(--color-text-muted);
}

.service-card--featured .service-card__list li {
  color: rgba(255, 255, 255, 0.85);
}

.service-card__list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 12px;
}

.service-card--featured .service-card__list li::before {
  color: var(--color-accent);
}

/* =====================
   About
   ===================== */
.about {
  background: var(--color-bg);
}

.about__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about__visual {
  position: relative;
}

.about__img-wrap {
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, #e8f0fe 0%, #c7d7fc 100%);
}

.about__img-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary);
  background: linear-gradient(135deg, #dbe8ff 0%, #b3cdff 100%);
}

.about__badge-wrap {
  position: absolute;
  bottom: -20px;
  right: -20px;
}

.about__badge {
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius);
  padding: 20px 24px;
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.about__badge-num {
  display: block;
  font-size: 32px;
  font-weight: 700;
  line-height: 1;
}

.about__badge-label {
  font-size: 13px;
  opacity: 0.85;
}

.about__text {
  font-size: 16px;
  color: var(--color-text-muted);
  margin-bottom: 16px;
  line-height: 1.8;
}

.about__values {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 32px;
}

.value {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.value__icon {
  font-size: 24px;
  flex-shrink: 0;
  margin-top: 2px;
}

.value strong {
  display: block;
  font-size: 16px;
  margin-bottom: 4px;
}

.value p {
  font-size: 14px;
  color: var(--color-text-muted);
}

/* =====================
   Cases
   ===================== */
.cases {
  background: var(--color-surface);
}

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

.case-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all 0.3s ease;
}

.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 87, 255, 0.2);
}

.case-card__industry {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: var(--color-primary);
  background: rgba(0, 87, 255, 0.08);
  padding: 4px 12px;
  border-radius: 50px;
  margin-bottom: 16px;
}

.case-card__title {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 8px;
}

.case-card__company {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.case-card__desc {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

.case-card__result {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.result-badge {
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 50px;
  background: linear-gradient(135deg, var(--color-primary), #0040cc);
  color: #fff;
}

/* =====================
   Cases Coming Soon
   ===================== */
.cases__coming-soon {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 72px 24px;
  background: var(--color-bg);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
}

.cases__coming-icon {
  font-size: 56px;
  opacity: 0.4;
}

.cases__coming-text {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text-muted);
  letter-spacing: 0.1em;
}

.cases__coming-sub {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: 8px;
}

/* =====================
   Flow
   ===================== */
.flow {
  background: linear-gradient(135deg, #0d1117 0%, #0a0f2e 100%);
  color: #fff;
}

.flow .section__label {
  color: var(--color-accent);
}

.flow .section__title {
  color: #fff;
}

.flow__steps {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.flow-step {
  flex: 1;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  transition: all 0.3s ease;
}

.flow-step:hover {
  background: rgba(0, 87, 255, 0.15);
  border-color: rgba(0, 87, 255, 0.3);
  transform: translateY(-4px);
}

.flow-step__num {
  font-size: 48px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 16px;
  opacity: 0.7;
}

.flow-step__body h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.flow-step__body p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.7;
}

.flow__arrow {
  font-size: 24px;
  color: rgba(255, 255, 255, 0.2);
  margin-top: 48px;
  flex-shrink: 0;
}

/* =====================
   Contact
   ===================== */
.contact {
  background: var(--color-bg);
}

.contact__inner {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 64px;
  align-items: start;
}

.contact__info {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.contact__item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.contact__icon {
  font-size: 24px;
  flex-shrink: 0;
}

.contact__item strong {
  display: block;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 4px;
}

.contact__item p {
  font-size: 15px;
  color: var(--color-text-muted);
}

/* Form */
.contact__form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow);
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form__group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.form__group label {
  font-size: 14px;
  font-weight: 600;
}

.required {
  color: #e53e3e;
}

.form__group input,
.form__group select,
.form__group textarea {
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 15px;
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
  resize: vertical;
}

.form__group input:focus,
.form__group select:focus,
.form__group textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 87, 255, 0.1);
}

.form__group input::placeholder,
.form__group textarea::placeholder {
  color: #9ca3af;
}

.form__note {
  text-align: center;
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 12px;
}

/* =====================
   Footer
   ===================== */
.footer {
  background: var(--color-dark);
  color: rgba(255, 255, 255, 0.7);
}

.footer__inner {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 64px;
  padding: 64px 24px;
}

.footer__brand .header__logo {
  color: #fff;
  margin-bottom: 16px;
  display: inline-flex;
}

.footer__tagline {
  font-size: 14px;
  line-height: 1.7;
  max-width: 280px;
}

.footer__nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.footer__nav-col strong {
  display: block;
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer__nav-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer__nav-col a {
  font-size: 14px;
  transition: color 0.2s;
}

.footer__nav-col a:hover {
  color: #fff;
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  text-align: center;
  padding: 20px 24px;
  font-size: 13px;
}

/* =====================
   Responsive
   ===================== */
@media (max-width: 1024px) {
  .services__grid,
  .cases__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .flow__steps {
    flex-wrap: wrap;
  }

  .flow-step {
    flex: 1 1 calc(50% - 32px);
  }

  .flow__arrow {
    display: none;
  }

  .about__inner {
    gap: 48px;
  }
}

@media (max-width: 768px) {
  :root {
    --header-h: 60px;
  }

  .section {
    padding: 72px 0;
  }

  .nav {
    display: none;
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--color-surface);
    padding: 24px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
  }

  .nav.open {
    display: block;
  }

  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .nav__link {
    padding: 12px 16px;
    border-radius: 8px;
    text-align: left;
  }

  .nav__link--cta {
    text-align: center;
    margin-left: 0;
    margin-top: 8px;
  }

  .hamburger {
    display: flex;
  }

  .hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .hamburger.active span:nth-child(2) {
    opacity: 0;
  }

  .hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .hero__content {
    padding: 48px 24px;
  }

  .hero__actions {
    flex-direction: column;
    align-items: flex-start;
  }

  .br-pc {
    display: none;
  }

  .services__grid,
  .cases__grid {
    grid-template-columns: 1fr;
  }

  .about__inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about__badge-wrap {
    right: 0;
    bottom: -16px;
  }

  .flow__steps {
    flex-direction: column;
  }

  .flow-step {
    flex: none;
  }

  .contact__inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .form__row {
    grid-template-columns: 1fr;
  }

  .footer__inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer__nav {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .hero__stats {
    gap: 20px;
  }

  .stat__num {
    font-size: 28px;
  }

  .contact__form {
    padding: 24px;
  }

  .footer__nav {
    grid-template-columns: 1fr;
  }
}