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

:root {
  /* Brand color palette */
  --navy:        #0B1E3F;   /* Deep Navy — text/primary */
  --blue-dark:   #1E3A8A;   /* Royal Blue — main brand */
  --blue:        #2563EB;   /* Vivid Blue — accent */
  --blue-mid:    #3B82F6;   /* Bright Blue — links/buttons */
  --blue-light:  #7FC8F8;   /* Sky Blue — highlights */
  --blue-pale:   #EAF3FB;   /* Pale Blue — backgrounds */
  --white:       #ffffff;
  --gray-bg:     #F7FAFD;   /* Off-white background */
  --gray-line:   #E2E8F0;
  --gray-text:   #64748B;   /* Body text */
  --text-dark:   #0F1E3D;   /* Headings */

  --font-en: 'Montserrat', sans-serif;
  --font-ja: 'Noto Sans JP', sans-serif;
  --transition: 0.35s ease;
  --shadow:    0 8px 32px rgba(11, 30, 63, 0.08);
  --shadow-lg: 0 20px 60px rgba(11, 30, 63, 0.16);
  --radius: 16px;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: var(--font-ja);
  color: var(--text-dark);
  background: var(--white);
  line-height: 1.8;
  overflow-x: hidden;
  width: 100%;
  position: relative;
}

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

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

.container {
  width: 90%;
  max-width: 1100px;
  margin: 0 auto;
}

.sp-none {
  display: inline;
}

/* ===========================
   Buttons
=========================== */
.btn {
  display: inline-block;
  padding: 14px 40px;
  border-radius: 50px;
  font-family: var(--font-en);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  transition: all var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
}

.btn--primary {
  background: var(--white);
  color: var(--blue-dark);
}

.btn--primary:hover {
  background: transparent;
  border-color: var(--white);
  color: var(--white);
}

/* ===========================
   Section Header
=========================== */
.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-header__en {
  font-family: var(--font-en);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--blue-mid);
  margin-bottom: 10px;
}

.section-header__ja {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--text-dark);
  letter-spacing: 0.05em;
}

/* ===========================
   Header / Nav
=========================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: background var(--transition), box-shadow var(--transition);
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 2px 20px rgba(10, 36, 99, 0.08);
  backdrop-filter: blur(12px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 5%;
  max-width: 1200px;
  margin: 0 auto;
}

.nav__logo a {
  display: flex;
  align-items: center;
}

.nav__logo-img {
  height: 40px;
  width: auto;
  display: block;
  transition: opacity var(--transition);
}

.nav__logo-img--color {
  display: none;
}

.header.scrolled .nav__logo-img--white {
  display: none;
}

.header.scrolled .nav__logo-img--color {
  display: block;
}

.nav__menu {
  display: flex;
  gap: 40px;
  list-style: none;
}

.nav__link {
  font-family: var(--font-en);
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.9);
  transition: color var(--transition);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--blue-light);
  transition: width var(--transition);
}

.nav__link:hover::after {
  width: 100%;
}

.header.scrolled .nav__link {
  color: var(--text-dark);
}

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

.nav__hamburger span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all var(--transition);
}

.header.scrolled .nav__hamburger span {
  background: var(--text-dark);
}

/* ===========================
   Hero
=========================== */
.hero {
  position: relative;
  height: 100svh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-image: url('images/hero-bg.svg');
  background-size: cover;
  background-position: center;
  z-index: 0;
}

.hero__bg::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 120px;
  background: var(--white);
  clip-path: ellipse(55% 100% at 50% 100%);
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: var(--white);
  padding: 0 20px;
}

.hero__sub {
  font-family: var(--font-en);
  font-size: 0.85rem;
  font-weight: 300;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  opacity: 0.8;
  margin-bottom: 20px;
}

.hero__title {
  font-size: clamp(2rem, 5.5vw, 3.8rem);
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 24px;
  letter-spacing: 0.04em;
}

.hero__title span {
  color: #a8d4f5;
}

.hero__desc {
  font-size: clamp(0.9rem, 1.8vw, 1.05rem);
  opacity: 0.85;
  margin-bottom: 44px;
  letter-spacing: 0.04em;
}

.hero__scroll {
  position: absolute;
  bottom: 140px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: rgba(255,255,255,0.7);
}

.hero__scroll span {
  display: block;
  width: 1px;
  height: 50px;
  background: rgba(255,255,255,0.5);
  animation: scrollLine 1.8s ease infinite;
}

.hero__scroll p {
  font-family: var(--font-en);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
}

@keyframes scrollLine {
  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; }
}

/* ===========================
   Concept
=========================== */
.concept {
  padding: 120px 0 100px;
  background: var(--white);
}

.concept__body {
  display: flex;
  align-items: center;
  gap: 80px;
}

.concept__visual {
  flex: 0 0 360px;
  display: flex;
  justify-content: center;
}

.concept__visual-img {
  width: 100%;
  max-width: 360px;
  height: auto;
  filter: drop-shadow(0 12px 32px rgba(30, 58, 138, 0.18));
}

.concept__text {
  flex: 1;
}

.concept__heading {
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  font-weight: 700;
  line-height: 1.5;
  color: var(--blue-dark);
  margin-bottom: 28px;
}

.concept__copy {
  font-size: 0.98rem;
  color: var(--gray-text);
  line-height: 2;
  margin-bottom: 16px;
}

/* ===========================
   Services
=========================== */
.services {
  padding: 120px 0 130px;
  background: linear-gradient(180deg, var(--gray-bg) 0%, #ffffff 100%);
  position: relative;
  overflow: hidden;
}

.services::before {
  content: '';
  position: absolute;
  top: 0;
  right: -100px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(127, 200, 248, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.services::after {
  content: '';
  position: absolute;
  bottom: 60px;
  left: -80px;
  width: 240px;
  height: 240px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.service-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.service-card__img {
  width: 100%;
  aspect-ratio: 400 / 280;
  overflow: hidden;
}

.service-card__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.service-card:hover .service-card__img img {
  transform: scale(1.05);
}

.service-card__body {
  padding: 32px 32px 36px;
  position: relative;
}

.service-card__num {
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 3rem;
  color: var(--blue-pale);
  line-height: 1;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.service-card__title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--blue-dark);
  margin-bottom: 16px;
  letter-spacing: 0.03em;
}

.service-card__desc {
  font-size: 0.9rem;
  color: var(--gray-text);
  line-height: 1.9;
}

/* ===========================
   Company
=========================== */
.company {
  padding: 100px 0 120px;
  background: var(--white);
}

.company__inner {
  max-width: 760px;
  margin: 0 auto;
  background: var(--white);
  border: 1px solid var(--blue-pale);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.company__table {
  width: 100%;
  border-collapse: collapse;
}

.company__table tr {
  border-bottom: 1px solid #e2e8f0;
}

.company__table tr:last-child {
  border-bottom: none;
}

.company__table th,
.company__table td {
  padding: 24px 36px;
  font-size: 0.95rem;
  text-align: left;
  vertical-align: middle;
}

.company__table th {
  font-weight: 700;
  color: var(--blue-dark);
  white-space: nowrap;
  width: 36%;
  background: rgba(74, 158, 221, 0.06);
  border-right: 2px solid var(--blue-pale);
}

.company__table td {
  color: var(--gray-text);
  line-height: 1.8;
}

.company__table td a {
  color: var(--blue-mid);
  transition: color var(--transition);
}

.company__table td a:hover {
  color: var(--blue-dark);
}

/* ===========================
   Locations
=========================== */
.locations {
  padding: 100px 0 120px;
  background: linear-gradient(180deg, var(--gray-bg) 0%, #ffffff 100%);
  position: relative;
}

.locations__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1000px;
  margin: 0 auto;
}

.location-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
  border-top: 4px solid var(--blue-mid);
  transition: transform var(--transition), box-shadow var(--transition);
}

.location-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.location-card::before {
  content: '';
  position: absolute;
  top: -40px;
  right: -40px;
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, rgba(127, 200, 248, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.location-card__num {
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 1.6rem;
  color: var(--blue-pale);
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.location-card__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--blue-dark);
  margin-bottom: 12px;
  letter-spacing: 0.04em;
  position: relative;
  padding-left: 16px;
}

.location-card__title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--blue-mid);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.15);
}

.location-card__address {
  font-size: 0.9rem;
  color: var(--gray-text);
  line-height: 1.85;
}

/* Responsive — Locations */
@media (max-width: 900px) {
  .locations__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .locations {
    padding: 60px 0 80px;
  }
  .locations__grid {
    grid-template-columns: 1fr;
    max-width: 360px;
  }
  .location-card {
    padding: 24px 22px;
  }
}

/* ===========================
   Footer
=========================== */
.footer {
  background: linear-gradient(135deg, var(--navy) 0%, var(--blue-dark) 100%);
  color: rgba(255,255,255,0.7);
  padding: 48px 0;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer__logo {
  height: 36px;
  width: auto;
}

.footer__copy {
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

/* ===========================
   Sub Page (Works)
=========================== */
.page-sub {
  background: var(--white);
}

.header--solid {
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 2px 20px rgba(11, 30, 63, 0.08);
  backdrop-filter: blur(12px);
}

.header--solid .nav__logo-img--white { display: none; }
.header--solid .nav__logo-img--color { display: block; }
.header--solid .nav__link { color: var(--text-dark); }
.header--solid .nav__hamburger span { background: var(--text-dark); }

.nav__link--active {
  color: var(--blue-mid) !important;
}
.nav__link--active::after {
  width: 100% !important;
}

.page-hero {
  position: relative;
  padding: 160px 0 80px;
  text-align: center;
  overflow: hidden;
  color: var(--white);
}

.page-hero__bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--navy) 0%, var(--blue-dark) 50%, var(--blue-mid) 100%);
  z-index: -1;
}

.page-hero__bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 50% 80% at 80% 50%, rgba(127, 200, 248, 0.3) 0%, transparent 60%),
    radial-gradient(ellipse 60% 80% at 20% 100%, rgba(168, 85, 247, 0.2) 0%, transparent 60%);
}

.page-hero__en {
  font-family: var(--font-en);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--blue-light);
  margin-bottom: 12px;
}

.page-hero__ja {
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: 0.06em;
}

.page-hero__desc {
  font-size: 0.95rem;
  opacity: 0.85;
  letter-spacing: 0.04em;
}

/* Works section */
.works {
  padding: 80px 0 120px;
  background: var(--gray-bg);
}

.works__filter {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.works__filter-btn {
  background: var(--white);
  border: 1px solid var(--blue-pale);
  color: var(--gray-text);
  font-family: var(--font-en);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  padding: 10px 28px;
  border-radius: 50px;
  cursor: pointer;
  transition: all var(--transition);
}

.works__filter-btn:hover {
  border-color: var(--blue-mid);
  color: var(--blue-mid);
}

.works__filter-btn.is-active {
  background: var(--blue-mid);
  color: var(--white);
  border-color: var(--blue-mid);
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.3);
}

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

.work-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
  cursor: pointer;
}

.work-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.work-card.is-hidden {
  display: none;
}

.work-card__img {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

.work-card__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.work-card:hover .work-card__img img {
  transform: scale(1.06);
}

.work-card__tag {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(11, 30, 63, 0.85);
  color: var(--white);
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  padding: 6px 14px;
  border-radius: 4px;
  backdrop-filter: blur(8px);
}

.work-card__body {
  padding: 22px 24px 26px;
}

.work-card__date {
  font-family: var(--font-en);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--blue-mid);
  margin-bottom: 8px;
}

.work-card__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 6px;
  line-height: 1.5;
}

.work-card__client {
  font-size: 0.85rem;
  color: var(--gray-text);
}

/* CTA */
.works__cta {
  margin-top: 96px;
  padding: 64px 32px;
  background: linear-gradient(135deg, var(--blue-dark) 0%, var(--blue-mid) 100%);
  border-radius: var(--radius);
  text-align: center;
  color: var(--white);
  box-shadow: var(--shadow-lg);
}

.works__cta-title {
  font-size: clamp(1.4rem, 2.5vw, 1.9rem);
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}

.works__cta-desc {
  margin-bottom: 28px;
  opacity: 0.9;
  font-size: 0.95rem;
}

.btn--accent {
  background: var(--white);
  color: var(--blue-dark);
}

.btn--accent:hover {
  background: var(--blue-light);
  color: var(--white);
}

/* ===========================
   Flow Steps
=========================== */
.flow {
  padding: 100px 0 80px;
  background: var(--white);
}

.flow__list {
  list-style: none;
  max-width: 820px;
  margin: 0 auto;
  position: relative;
  padding-left: 0;
}

.flow__list::before {
  content: '';
  position: absolute;
  left: 39px;
  top: 40px;
  bottom: 40px;
  width: 2px;
  background: linear-gradient(180deg, var(--blue-light), var(--blue-mid), var(--blue-pale));
  opacity: 0.5;
}

.flow-step {
  display: flex;
  gap: 32px;
  position: relative;
  padding: 16px 0 32px;
}

.flow-step:last-child {
  padding-bottom: 0;
}

.flow-step__num {
  flex: 0 0 80px;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue-mid), var(--blue-dark));
  color: var(--white);
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 1.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  letter-spacing: 0.05em;
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.3);
  position: relative;
  z-index: 1;
}

.flow-step__body {
  flex: 1;
  background: var(--gray-bg);
  border-radius: var(--radius);
  padding: 24px 28px;
  border-left: 4px solid var(--blue-mid);
  transition: transform var(--transition), box-shadow var(--transition);
}

.flow-step__body:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow);
}

.flow-step__title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--blue-dark);
  margin-bottom: 10px;
  letter-spacing: 0.04em;
}

.flow-step__desc {
  font-size: 0.92rem;
  color: var(--gray-text);
  line-height: 1.9;
  margin-bottom: 12px;
}

.flow-step__time {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--blue-mid);
  background: var(--blue-pale);
  padding: 4px 12px;
  border-radius: 4px;
}

/* ===========================
   FAQ
=========================== */
.faq {
  padding: 80px 0 120px;
  background: var(--gray-bg);
}

.faq__list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--white);
  border-radius: 12px;
  border: 1px solid var(--blue-pale);
  overflow: hidden;
  transition: box-shadow var(--transition);
}

.faq-item[open] {
  box-shadow: var(--shadow);
}

.faq-item__q {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  cursor: pointer;
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--text-dark);
  list-style: none;
  position: relative;
  padding-right: 56px;
}

.faq-item__q::-webkit-details-marker {
  display: none;
}

.faq-item__q::after {
  content: '+';
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--blue-mid);
  transition: transform var(--transition);
}

.faq-item[open] .faq-item__q::after {
  transform: translateY(-50%) rotate(45deg);
}

.faq-item__mark {
  flex: 0 0 32px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--blue-mid);
  color: var(--white);
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.faq-item__mark--a {
  background: var(--blue-light);
}

.faq-item__a {
  display: flex;
  gap: 16px;
  padding: 0 24px 22px 24px;
  align-items: flex-start;
}

.faq-item__a p {
  flex: 1;
  font-size: 0.92rem;
  color: var(--gray-text);
  line-height: 1.9;
  padding-top: 4px;
}

/* Responsive — Flow & FAQ */
@media (max-width: 640px) {
  .flow {
    padding: 60px 0 40px;
  }
  .faq {
    padding: 40px 0 80px;
  }
  .flow__list::before {
    left: 27px;
  }
  .flow-step {
    gap: 16px;
  }
  .flow-step__num {
    flex: 0 0 56px;
    width: 56px;
    height: 56px;
    font-size: 1.05rem;
  }
  .flow-step__body {
    padding: 18px 18px;
  }
  .flow-step__title {
    font-size: 1.05rem;
  }
  .faq-item__q {
    font-size: 0.9rem;
    padding: 16px 20px;
    padding-right: 48px;
    gap: 12px;
  }
  .faq-item__a {
    padding: 0 20px 18px 20px;
    gap: 12px;
  }
  .faq-item__mark {
    flex: 0 0 26px;
    width: 26px;
    height: 26px;
    font-size: 0.78rem;
  }
}

/* Responsive — Works */
@media (max-width: 900px) {
  .works__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}

@media (max-width: 640px) {
  .page-hero {
    padding: 120px 0 60px;
  }
  .works {
    padding: 60px 0 80px;
  }
  .works__grid {
    grid-template-columns: 1fr;
  }
  .works__cta {
    padding: 48px 24px;
    margin-top: 64px;
  }
}

/* ===========================
   Scroll Animation
=========================== */
.fade-up {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.services__grid .service-card:nth-child(2) { transition-delay: 0.12s; }
.services__grid .service-card:nth-child(3) { transition-delay: 0.24s; }

/* ===========================
   Responsive — Tablet
=========================== */
@media (max-width: 900px) {
  .concept__body {
    flex-direction: column;
    gap: 48px;
  }

  .concept__visual {
    flex: none;
  }

  .services__grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }

  .sp-none {
    display: none;
  }
}

/* ===========================
   Responsive — Mobile
=========================== */
@media (max-width: 640px) {
  /* Nav */
  .nav {
    padding: 16px 5%;
  }

  .nav__hamburger {
    display: flex;
    z-index: 200;
  }

  .nav__hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .nav__hamburger.active span:nth-child(2) {
    opacity: 0;
  }
  .nav__hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .nav__menu {
    position: fixed;
    inset: 0;
    background: rgba(10, 36, 99, 0.97);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 48px;
    transform: translateX(100%);
    transition: transform var(--transition);
  }

  .nav__menu.open {
    transform: translateX(0);
  }

  .nav__link {
    font-size: 1.3rem;
    color: var(--white) !important;
  }

  /* Hero */
  .hero__title {
    font-size: 1.8rem;
  }

  .hero__bg::after {
    height: 70px;
  }

  .hero__scroll {
    bottom: 90px;
  }

  /* Concept */
  .concept {
    padding: 80px 0 60px;
  }

  .concept__visual-inner {
    width: 200px;
    height: 200px;
  }

  .concept__circle--1 { width: 200px; height: 200px; }
  .concept__circle--2 { width: 155px; height: 155px; }
  .concept__circle--3 { width: 108px; height: 108px; }

  /* Services */
  .services {
    padding: 60px 0 80px;
  }

  .service-card__body {
    padding: 28px 24px 30px;
  }

  /* Company */
  .company {
    padding: 60px 0 80px;
  }

  .company__table th,
  .company__table td {
    padding: 18px 20px;
    font-size: 0.88rem;
    display: block;
    width: 100%;
  }

  .company__table th {
    border-right: none;
    border-bottom: 1px solid var(--blue-pale);
    padding-bottom: 10px;
  }

  .company__table td {
    padding-top: 10px;
    background: var(--white);
  }

  .company__table tr {
    display: block;
  }

  /* Footer */
  .footer__inner {
    flex-direction: column;
    text-align: center;
  }

  /* Section header */
  .section-header {
    margin-bottom: 44px;
  }
}