/* ===== CSS Variables ===== */
:root {
  --gold: #C9A227;
  --gold-light: #D4B34A;
  --gold-dark: #A68620;
  --gold-pale: #F5EED6;
  --white: #FEFEFE;
  --off-white: #FAF9F7;
  --cream: #F7F5F0;
  --text-dark: #2C2C2C;
  --text-medium: #5A5A5A;
  --text-light: #8A8A8A;
  --border-light: rgba(201, 162, 39, 0.2);

  --font-jp: 'Shippori Mincho', serif;
  --font-en: 'Cormorant Garamond', serif;

  --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-jp);
  color: var(--text-dark);
  background: var(--white);
  line-height: 1.8;
  overflow-x: hidden;
}

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

.section {
  padding: 120px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 80px;
}

.section-title-en {
  font-family: var(--font-en);
  font-size: 0.875rem;
  font-weight: 400;
  letter-spacing: 0.3em;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-title-jp {
  font-size: 2rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--text-dark);
}

.gold-line {
  width: 60px;
  height: 1px;
  background: var(--gold);
  margin: 24px auto 0;
}

/* ===== Loading Screen ===== */
.loading {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.8s ease, visibility 0.8s ease;
}

.loading.hidden {
  opacity: 0;
  visibility: hidden;
}

.loading-logo {
  width: 400px;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.4; transform: scale(0.98); }
  50% { opacity: 1; transform: scale(1); }
}

/* ===== Header ===== */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 20px 0;
  transition: var(--transition);
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0.85) 60%, transparent 100%);
}

header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  padding: 5px 0;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

nav {
  /* メニューは右側に配置 */
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo img {
  height: 200px;
  transition: var(--transition);
}

header.scrolled .logo img {
  height: 110px;
  margin: -15px 0;
}

nav#nav {
  display: flex;
  align-items: center;
  gap: 40px;
}

nav a {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-dark);
  text-decoration: none;
  letter-spacing: 0.1em;
  position: relative;
  transition: var(--transition);
}

nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--gold);
  transition: var(--transition);
}

nav a:hover {
  color: var(--gold);
}

nav a:hover::after {
  width: 100%;
}

.contact-btn {
  padding: 0;
  background: transparent;
  color: var(--text-dark) !important;
  border: none;
  border-radius: 0;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  transition: var(--transition);
}

.contact-btn::after {
  display: block;
}

.contact-btn:hover {
  background: transparent;
  color: var(--gold) !important;
  transform: none;
  box-shadow: none;
}

/* Mobile Menu */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  padding: 10px;
  z-index: 1001;
}

.menu-toggle span {
  width: 24px;
  height: 1px;
  background: var(--text-dark);
  transition: var(--transition);
}

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

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

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

/* ===== Hero Section ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background: var(--white);
  overflow: hidden;
}

.hero-slider {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1.5s ease;
}

.hero-slide.active {
  opacity: 1;
}

.hero-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.75) saturate(0.95);
}

.hero-slide::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.15);
  pointer-events: none;
}

.hero-decoration {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  border: 1px solid rgba(201, 162, 39, 0.1);
  border-radius: 50%;
  pointer-events: none;
  z-index: 1;
}

.hero-decoration::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 400px;
  height: 400px;
  border: 1px solid rgba(201, 162, 39, 0.15);
  border-radius: 50%;
}

.hero-content {
  text-align: center;
  z-index: 2;
  animation: fadeInUp 1s ease-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-content h1 {
  font-family: var(--font-en);
  font-size: 3.5rem;
  font-weight: 400;
  letter-spacing: 0.3em;
  color: var(--gold);
  margin-bottom: 1.5rem;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5), 0 0 30px rgba(0, 0, 0, 0.3);
}

.hero-content p {
  font-size: 1rem;
  color: var(--white);
  letter-spacing: 0.2em;
  font-weight: 300;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
}

/* Slider Navigation */
.slider-nav {
  position: absolute;
  bottom: 140px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  z-index: 20;
}

.slider-dot {
  width: 10px;
  height: 10px;
  border: 1px solid var(--gold);
  border-radius: 50%;
  cursor: pointer;
  transition: var(--transition);
  background: transparent;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.slider-dot.active {
  background: var(--gold);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
}

.scroll-indicator {
  position: absolute;
  bottom: 3rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--gold);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  z-index: 20;
  animation: bounce 2s infinite;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
}

.scroll-indicator::after {
  content: '';
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--gold), transparent);
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(10px); }
}

/* ===== About Section ===== */
.about {
  background: var(--white);
  position: relative;
}

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

.about-text h3 {
  font-size: 1.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  margin-bottom: 30px;
  line-height: 1.8;
}

.about-text p {
  font-size: 1rem;
  color: var(--text-medium);
  line-height: 2.2;
  margin-bottom: 20px;
}

.about-image {
  position: relative;
  line-height: 0;
}

.about-image img {
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
  box-shadow: 0 15px 50px rgba(0, 0, 0, 0.2);
}

/* ===== Services Section ===== */
.services {
  background: var(--cream);
  position: relative;
}

.services::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23C9A227' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  position: relative;
}

.service-card {
  background: var(--white);
  padding: 50px 40px;
  text-align: center;
  border-radius: 4px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), var(--gold-light));
  transform: scaleX(0);
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-number {
  font-family: var(--font-en);
  font-size: 3rem;
  font-weight: 300;
  color: var(--gold);
  opacity: 0.3;
  margin-bottom: 20px;
}

.service-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.service-icon svg {
  width: 100%;
  height: 100%;
  stroke: var(--gold);
  stroke-width: 1.5;
  fill: none;
}

.service-card h3 {
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  margin-bottom: 20px;
  color: var(--text-dark);
}

.service-card p {
  font-size: 0.9375rem;
  color: var(--text-medium);
  line-height: 2;
}

/* ===== Works Section ===== */
.works {
  background: var(--white);
}

.works-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.work-item {
  position: relative;
  overflow: hidden;
  border-radius: 4px;
  cursor: pointer;
  transition: var(--transition);
}

.work-item:hover {
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.work-item::before {
  content: '';
  display: block;
  padding-top: 75%;
}

.work-item img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-slow);
}

.work-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    to top,
    rgba(44, 44, 44, 0.85) 0%,
    rgba(44, 44, 44, 0.2) 50%,
    transparent 100%
  );
  opacity: 1;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 30px;
}

.work-item:hover img {
  transform: scale(1.1);
}

.work-overlay h4 {
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--white);
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.work-overlay p {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 0.05em;
}

/* ===== Representative Section ===== */
.representative {
  background: linear-gradient(135deg, var(--cream) 0%, var(--white) 100%);
}

.representative-content {
  display: grid;
  grid-template-columns: 350px 1fr;
  gap: 80px;
  align-items: start;
}

.representative-image {
  position: relative;
  line-height: 0;
}

.representative-image img {
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  object-position: center top;
  filter: grayscale(20%);
  display: block;
  box-shadow: 0 15px 50px rgba(0, 0, 0, 0.2);
}

.representative-info h3 {
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  margin-bottom: 10px;
}

.representative-info .position {
  font-size: 0.875rem;
  color: var(--gold);
  letter-spacing: 0.1em;
  margin-bottom: 30px;
}

.representative-info .message {
  font-size: 1rem;
  color: var(--text-medium);
  line-height: 2.2;
  margin-bottom: 30px;
}

.representative-info .career {
  padding-top: 30px;
  border-top: 1px solid var(--border-light);
}

.representative-info .career h4 {
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  margin-bottom: 15px;
  color: var(--text-dark);
}

.representative-info .career ul {
  list-style: none;
}

.representative-info .career li {
  font-size: 0.875rem;
  color: var(--text-medium);
  padding: 8px 0;
  padding-left: 20px;
  position: relative;
}

.representative-info .career li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 6px;
  height: 1px;
  background: var(--gold);
}

/* ===== Company Section ===== */
.company {
  background: var(--text-dark);
  color: var(--white);
}

.company .section-title-en {
  color: var(--gold-light);
}

.company .section-title-jp {
  color: var(--white);
}

.company-table {
  max-width: 800px;
  margin: 0 auto;
}

.company-row {
  display: grid;
  grid-template-columns: 180px 1fr;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.company-row:first-child {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.company-row dt {
  padding: 24px 0;
  font-size: 0.875rem;
  color: var(--gold-light);
  letter-spacing: 0.1em;
}

.company-row dd {
  padding: 24px 0;
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.8;
}

/* ===== Contact Section ===== */
.contact {
  background: var(--white);
  position: relative;
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
}

.contact-info h3 {
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  margin-bottom: 20px;
}

.contact-info p {
  font-size: 1rem;
  color: var(--text-medium);
  line-height: 2;
  margin-bottom: 40px;
}

.contact-details {
  margin-bottom: 40px;
}

.contact-details div {
  display: flex;
  align-items: flex-start;
  gap: 15px;
  margin-bottom: 20px;
}

.contact-details svg {
  width: 20px;
  height: 20px;
  stroke: var(--gold);
  stroke-width: 1.5;
  fill: none;
  flex-shrink: 0;
  margin-top: 3px;
}

.contact-details span {
  font-size: 0.9375rem;
  color: var(--text-medium);
  line-height: 1.8;
}

.contact-form {
  background: var(--cream);
  padding: 50px;
  border-radius: 4px;
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
  margin-bottom: 10px;
  color: var(--text-dark);
}

.form-group label .required {
  color: #C75050;
  font-size: 0.75rem;
  margin-left: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  font-family: var(--font-jp);
  font-size: 1rem;
  border: 1px solid var(--border-light);
  border-radius: 2px;
  background: var(--white);
  transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(201, 162, 39, 0.1);
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%235A5A5A' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  cursor: pointer;
}

.form-submit {
  width: 100%;
  padding: 18px;
  background: var(--gold);
  color: var(--white);
  font-family: var(--font-jp);
  font-size: 1rem;
  letter-spacing: 0.15em;
  border: none;
  border-radius: 2px;
  cursor: pointer;
  transition: var(--transition);
}

.form-submit:hover {
  background: var(--gold-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(201, 162, 39, 0.3);
}

/* ===== Footer ===== */
footer {
  background: #1A1A1A;
  color: var(--white);
  padding: 60px 0 30px;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 50px;
}

.footer-logo img {
  height: 200px;
}

.footer-nav {
  display: flex;
  gap: 40px;
}

.footer-nav a {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  letter-spacing: 0.1em;
  transition: var(--transition);
}

.footer-nav a:hover {
  color: var(--gold-light);
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
}

.footer-bottom p {
  font-family: var(--font-en);
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 0.1em;
}

/* ===== Scroll Animations ===== */
.fade-in {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.fade-in-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.fade-in-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ===== Back to Top ===== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: var(--gold);
  color: var(--white);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--gold-dark);
  transform: translateY(-3px);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}

/* ===== Responsive ===== */

/* タブレット（1024px以下） */
@media (max-width: 1024px) {
  .section {
    padding: 80px 0;
  }

  .logo img {
    height: 140px;
  }

  header.scrolled .logo img {
    height: 80px;
  }

  nav#nav {
    gap: 25px;
    margin-top: -15px;
  }

  nav a {
    font-size: 0.9rem;
  }

  .about-content {
    grid-template-columns: 1fr;
    gap: 50px;
  }

  .about-image {
    order: -1;
    max-width: 500px;
    margin: 0 auto;
  }

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

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

  .representative-content {
    grid-template-columns: 1fr;
    gap: 50px;
  }

  .representative-image {
    max-width: 350px;
    margin: 0 auto;
  }

  .contact-wrapper {
    grid-template-columns: 1fr;
    gap: 50px;
  }
}

/* タブレット・スマホ（768px以下） */
@media (max-width: 768px) {
  header {
    padding: 15px 0;
    background: rgba(255, 255, 255, 0.95);
  }

  .header-inner {
    flex-direction: row;
    justify-content: space-between;
  }

  .logo {
    margin-top: 0;
  }

  .logo img {
    height: 80px;
  }

  header.scrolled .logo img {
    height: 60px;
  }

  nav#nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 320px;
    height: 100vh;
    background: var(--white);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 30px;
    margin-top: 0;
    transition: var(--transition);
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.1);
  }

  nav#nav.active {
    right: 0;
  }

  nav a {
    font-size: 1rem;
  }

  .menu-toggle {
    display: flex;
  }

  .contact-btn {
    margin-top: 20px;
  }

  .hero-content h1 {
    font-size: 2rem;
    letter-spacing: 0.15em;
  }

  .hero-content p {
    font-size: 0.9rem;
  }

  .hero-decoration {
    width: 300px;
    height: 300px;
  }

  .hero-decoration::before {
    width: 200px;
    height: 200px;
  }

  .slider-nav {
    bottom: 100px;
  }

  .section-header {
    margin-bottom: 50px;
  }

  .section-title-jp {
    font-size: 1.5rem;
  }

  .about-text h3 {
    font-size: 1.4rem;
  }

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

  .service-card {
    padding: 40px 30px;
  }

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

  .representative-info h3 {
    font-size: 1.25rem;
  }

  .representative-info .career li {
    font-size: 0.8rem;
  }

  .company-row {
    grid-template-columns: 1fr;
  }

  .company-row dt {
    padding-bottom: 5px;
  }

  .company-row dd {
    padding-top: 5px;
  }

  .contact-info h3 {
    font-size: 1.25rem;
  }

  .contact-form {
    padding: 30px 20px;
  }

  .footer-logo img {
    height: 100px;
  }

  .footer-content {
    flex-direction: column;
    align-items: center;
    gap: 30px;
    text-align: center;
  }

  .footer-nav {
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
  }

  .footer-nav a {
    font-size: 0.8rem;
  }

  .scroll-indicator {
    display: none;
  }

  .loading-logo {
    width: 250px;
  }
}

/* スマホ（480px以下） */
@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .section {
    padding: 60px 0;
  }

  .logo img {
    height: 60px;
  }

  header.scrolled .logo img {
    height: 50px;
  }

  .hero-content h1 {
    font-size: 1.5rem;
    letter-spacing: 0.1em;
  }

  .hero-content p {
    font-size: 0.8rem;
  }

  .hero-decoration {
    width: 250px;
    height: 250px;
  }

  .hero-decoration::before {
    width: 180px;
    height: 180px;
  }

  .section-title-en {
    font-size: 0.75rem;
  }

  .section-title-jp {
    font-size: 1.25rem;
  }

  .about-text h3 {
    font-size: 1.2rem;
  }

  .about-text p {
    font-size: 0.9rem;
  }

  .service-card {
    padding: 30px 20px;
  }

  .service-number {
    font-size: 2.5rem;
  }

  .service-card h3 {
    font-size: 1.1rem;
  }

  .service-card p {
    font-size: 0.875rem;
  }

  .work-overlay h4 {
    font-size: 1rem;
  }

  .work-overlay p {
    font-size: 0.75rem;
  }

  .representative-info h3 {
    font-size: 1.1rem;
  }

  .representative-info h3 span {
    display: block;
    margin-left: 0 !important;
    margin-top: 5px;
  }

  .representative-info .message {
    font-size: 0.9rem;
  }

  .company-row dt,
  .company-row dd {
    font-size: 0.85rem;
  }

  .contact-info p {
    font-size: 0.9rem;
  }

  .form-group label {
    font-size: 0.8rem;
  }

  .form-group input,
  .form-group select,
  .form-group textarea {
    font-size: 0.9rem;
    padding: 12px 14px;
  }

  .form-submit {
    font-size: 0.9rem;
    padding: 16px;
  }

  .footer-logo img {
    height: 80px;
  }

  .footer-nav {
    gap: 12px;
  }

  .footer-nav a {
    font-size: 0.75rem;
  }

  .back-to-top {
    width: 45px;
    height: 45px;
    bottom: 20px;
    right: 20px;
  }

  .loading-logo {
    width: 200px;
  }
}

@media (max-width: 480px) {
  .section-title-jp {
    font-size: 1.5rem;
  }

  .hero-content h1 {
    font-size: 1.75rem;
    letter-spacing: 0.15em;
  }

  .hero-content p {
    font-size: 0.875rem;
  }

  .section-header {
    margin-bottom: 50px;
  }
}