/* ===================================
   AND PROMOTION - Style Sheet
   =================================== */

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

:root {
  --color-primary: #e94560;
  --color-primary-dark: #c73350;
  --color-dark: #0f0f23;
  --color-dark-2: #1a1a2e;
  --color-dark-3: #16213e;
  --color-text: #333;
  --color-text-light: #666;
  --color-text-lighter: #999;
  --color-white: #fff;
  --color-bg: #fafafa;
  --color-border: #e0e0e0;
  --font-ja: "Noto Sans JP", "Hiragino Sans", "Hiragino Kaku Gothic ProN", sans-serif;
  --font-en: "Inter", sans-serif;
  --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-slow: 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

body {
  font-family: var(--font-ja);
  color: var(--color-text);
  background: var(--color-white);
  line-height: 1.8;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

img {
  max-width: 100%;
  height: auto;
}

ul {
  list-style: none;
}

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

.sp-only { display: none; }

/* --- Loading Screen --- */
.loading {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--color-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}

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

.loading-inner {
  text-align: center;
}

.loading-logo {
  font-family: 'Dancing Script', cursive;
  font-size: 48px;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 2px;
  margin-bottom: 32px;
  opacity: 0;
  transform: translateY(10px);
  animation: logoFadeIn 1.2s ease 0.4s both;
}

@keyframes logoFadeIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.loading-bar {
  width: 200px;
  height: 2px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 2px;
  overflow: hidden;
}

.loading-bar-fill {
  width: 0;
  height: 100%;
  background: var(--color-primary);
  border-radius: 2px;
  animation: loadingFill 1.8s ease-in-out forwards;
}

@keyframes loadingFill {
  to { width: 100%; }
}

/* --- Header --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 40px;
  height: 80px;
  display: flex;
  align-items: center;
  transition: var(--transition);
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  box-shadow: 0 1px 20px rgba(0, 0, 0, 0.06);
}

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

.header.scrolled .nav-link {
  color: var(--color-text);
}

.header.scrolled .hamburger span {
  background: var(--color-dark);
}

.header-inner {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: 'Dancing Script', cursive;
  font-size: 24px;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 1px;
}

.logo span {
  opacity: 0.7;
}

/* Navigation */
.nav-list {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-link {
  font-family: var(--font-en);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-white);
  letter-spacing: 1px;
  position: relative;
  padding: 8px 0;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: var(--transition);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-link--contact {
  background: var(--color-primary);
  color: var(--color-white) !important;
  padding: 10px 28px;
  border-radius: 30px;
  font-weight: 600;
}

.nav-link--contact::after {
  display: none;
}

.nav-link--contact:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
}

/* Dropdown */
.has-dropdown {
  position: relative;
}

.dropdown {
  position: absolute;
  top: 100%;
  left: -20px;
  background: var(--color-white);
  border-radius: 12px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.12);
  padding: 12px 0;
  min-width: 220px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: var(--transition);
}

.has-dropdown:hover .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown li a {
  display: block;
  padding: 10px 24px;
  font-size: 14px;
  color: var(--color-text);
}

.dropdown li a:hover {
  background: var(--color-bg);
  color: var(--color-primary);
}

/* Hamburger */
.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 32px;
  height: 24px;
  position: relative;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-white);
  position: absolute;
  left: 0;
  transition: var(--transition);
}

.hamburger span:nth-child(1) { top: 0; }
.hamburger span:nth-child(2) { top: 50%; transform: translateY(-50%); }
.hamburger span:nth-child(3) { bottom: 0; }

.hamburger.active span:nth-child(1) {
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
  background: var(--color-white);
}

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

.hamburger.active span:nth-child(3) {
  bottom: 50%;
  transform: translateY(50%) rotate(-45deg);
  background: var(--color-white);
}

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

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('images/main-visual.png');
  background-size: cover;
  background-position: center;
}

.hero-gradient {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15,15,35,0.82) 0%, rgba(26,26,46,0.78) 30%, rgba(22,33,62,0.74) 60%, rgba(15,52,96,0.70) 100%);
}

.hero-gradient::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -30%;
  width: 80%;
  height: 150%;
  background: radial-gradient(ellipse, rgba(233, 69, 96, 0.15) 0%, transparent 70%);
  animation: heroGlow 8s ease-in-out infinite alternate;
}

.hero-gradient::after {
  content: "";
  position: absolute;
  bottom: -30%;
  left: -20%;
  width: 60%;
  height: 120%;
  background: radial-gradient(ellipse, rgba(79, 172, 254, 0.1) 0%, transparent 70%);
  animation: heroGlow 10s ease-in-out infinite alternate-reverse;
}

@keyframes heroGlow {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(30px, -20px) scale(1.1); }
}

.hero-particles {
  position: absolute;
  inset: 0;
}

.particle {
  position: absolute;
  width: 3px;
  height: 3px;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  animation: particleFloat linear infinite;
}

@keyframes particleFloat {
  0% { transform: translateY(100vh) scale(0); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(-10vh) scale(1); opacity: 0; }
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 0 24px;
  max-width: 900px;
}

.hero-sub {
  font-family: var(--font-en);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-primary);
  letter-spacing: 6px;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero-title {
  margin-bottom: 32px;
}

.hero-title-line {
  display: block;
  font-size: clamp(32px, 6vw, 64px);
  font-weight: 900;
  color: var(--color-white);
  line-height: 1.3;
  letter-spacing: 2px;
}

.hero-desc {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 2;
  margin-bottom: 48px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 40px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-ja);
  letter-spacing: 1px;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 4px 20px rgba(233, 69, 96, 0.3);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(233, 69, 96, 0.4);
}

.btn-outline {
  border: 2px solid rgba(255, 255, 255, 0.4);
  color: var(--color-white);
  background: transparent;
}

.btn-outline:hover {
  border-color: var(--color-white);
  background: rgba(255, 255, 255, 0.1);
}

.btn-large {
  padding: 20px 60px;
  font-size: 16px;
}

/* Hero Scroll */
.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  z-index: 2;
}

.hero-scroll span {
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: 3px;
  color: rgba(255, 255, 255, 0.5);
  text-transform: uppercase;
}

.hero-scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.5), transparent);
  position: relative;
  overflow: hidden;
}

.hero-scroll-line::after {
  content: "";
  position: absolute;
  top: -100%;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-primary);
  animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
  0% { top: -100%; }
  100% { top: 100%; }
}

/* Fade Up Animation */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 0.8s ease forwards;
}

@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Section Common --- */
.section {
  padding: 120px 0;
}

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

.section-label {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 4px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 900;
  color: var(--color-dark);
  line-height: 1.4;
  letter-spacing: 1px;
}

.section-desc {
  font-size: 16px;
  color: var(--color-text-light);
  margin-top: 20px;
  line-height: 1.9;
}

/* Reveal Animation */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

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

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

.about-image {
  position: relative;
}

.about-image-inner {
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.about-image-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  aspect-ratio: 4/5;
}

.about-image-accent {
  position: absolute;
  bottom: -20px;
  right: -20px;
  width: 160px;
  height: 160px;
  border: 3px solid var(--color-primary);
  border-radius: 16px;
  z-index: -1;
  opacity: 0.3;
}

.about-text h3 {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 24px;
  line-height: 1.5;
}

.about-text p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 2;
  margin-bottom: 16px;
}

.about-numbers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
  padding-top: 48px;
  border-top: 1px solid var(--color-border);
}

.about-number {
  text-align: center;
}

.about-number-value {
  font-family: var(--font-en);
  font-size: 48px;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}

.about-number-unit {
  font-family: var(--font-en);
  font-size: 24px;
  font-weight: 600;
  color: var(--color-primary);
}

.about-number-label {
  display: block;
  font-size: 13px;
  color: var(--color-text-light);
  margin-top: 8px;
}

/* --- Service Section --- */
.service-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.service-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 48px 40px;
  position: relative;
  overflow: hidden;
  transition: var(--transition-slow);
}

.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), #764ba2);
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition-slow);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
  border-color: transparent;
}

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

.service-card-number {
  font-family: var(--font-en);
  font-size: 64px;
  font-weight: 800;
  color: rgba(0, 0, 0, 0.04);
  position: absolute;
  top: 16px;
  right: 24px;
  line-height: 1;
}

.service-card-icon {
  width: 48px;
  height: 48px;
  color: var(--color-primary);
  margin-bottom: 24px;
}

.service-card-title {
  font-family: var(--font-en);
  font-size: 24px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 16px;
}

.service-card-desc {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.9;
  margin-bottom: 20px;
}

.service-card-list {
  margin-bottom: 24px;
}

.service-card-list li {
  font-size: 13px;
  color: var(--color-text);
  padding: 6px 0;
  padding-left: 20px;
  position: relative;
}

.service-card-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-primary);
  opacity: 0.4;
}

.service-card-link {
  display: none;
}

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

.works .section-label { color: var(--color-primary); }
.works .section-title { color: var(--color-white); }
.works .section-desc { color: rgba(255, 255, 255, 0.6); }

.works-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.works-card {
  background: var(--color-dark-2);
  border-radius: 16px;
  overflow: hidden;
  transition: var(--transition);
}

.works-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.works-card-image {
  height: 200px;
  display: flex;
  align-items: flex-end;
  padding: 20px;
  position: relative;
}

.works-card-category {
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 600;
  color: var(--color-white);
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(10px);
  padding: 6px 16px;
  border-radius: 20px;
  letter-spacing: 1px;
}

.works-card-body {
  padding: 28px;
}

.works-card-body h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.5;
}

.works-card-body p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.8;
  margin-bottom: 20px;
}

.works-card-result {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.works-card-result span {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

.works-card-result strong {
  color: var(--color-primary);
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 16px;
  margin: 0 2px;
}

/* --- Flow Section --- */
.flow {
  background: var(--color-bg);
}

.flow-steps {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
}

.flow-steps::before {
  content: "";
  position: absolute;
  left: 44px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.flow-step {
  display: flex;
  gap: 40px;
  padding: 32px 0;
  position: relative;
}

.flow-step-number {
  flex-shrink: 0;
  width: 90px;
  height: 90px;
  border-radius: 50%;
  background: var(--color-white);
  border: 3px solid var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-en);
  font-size: 24px;
  font-weight: 800;
  color: var(--color-primary);
  position: relative;
  z-index: 1;
}

.flow-step-content h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 8px;
  margin-top: 8px;
}

.flow-step-content p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
}

/* --- Company Section --- */
.company-table {
  max-width: 800px;
  margin: 0 auto;
}

.company-table table {
  width: 100%;
  border-collapse: collapse;
}

.company-table th,
.company-table td {
  padding: 24px;
  font-size: 15px;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}

.company-table th {
  width: 180px;
  font-weight: 600;
  color: var(--color-dark);
  background: var(--color-bg);
}

.company-table td {
  color: var(--color-text-light);
}

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

.contact-form {
  max-width: 800px;
  margin: 0 auto;
  background: var(--color-white);
  padding: 60px;
  border-radius: 20px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.06);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

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

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: 8px;
}

.required {
  font-size: 11px;
  color: var(--color-primary);
  font-weight: 600;
  margin-left: 4px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 18px;
  font-size: 15px;
  font-family: var(--font-ja);
  border: 2px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-white);
  color: var(--color-text);
  transition: var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(233, 69, 96, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 140px;
}

.form-submit {
  text-align: center;
  margin-top: 16px;
}

/* --- Legal Pages --- */
.header--solid {
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(20px);
  box-shadow: 0 1px 20px rgba(0, 0, 0, 0.06);
}

.header--solid .logo,
.header--solid .nav-link {
  color: var(--color-dark);
}

.header--solid .hamburger span {
  background: var(--color-dark);
}

.legal-hero {
  background: linear-gradient(135deg, #0f0f23 0%, #1a1a2e 50%, #0f3460 100%);
  padding: 160px 0 80px;
  text-align: center;
}

.legal-hero-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.legal-hero h1 {
  font-size: clamp(28px, 5vw, 48px);
  font-weight: 700;
  color: var(--color-white);
}

.legal-content {
  padding: 80px 0 120px;
  background: #fafafa;
}

.legal-body {
  max-width: 800px;
  margin: 0 auto;
}

.legal-intro {
  font-size: 15px;
  line-height: 2;
  color: var(--color-text);
  margin-bottom: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.legal-section {
  margin-bottom: 48px;
}

.legal-section h2 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 16px;
  padding-left: 14px;
  border-left: 3px solid var(--color-primary);
}

.legal-section p {
  font-size: 14px;
  line-height: 2;
  color: var(--color-text);
}

.legal-section ul {
  margin-top: 12px;
  padding-left: 20px;
}

.legal-section ul li {
  font-size: 14px;
  line-height: 2;
  color: var(--color-text);
  list-style: disc;
}

.legal-section a {
  color: var(--color-primary);
  text-decoration: underline;
}

.legal-contact {
  margin-top: 16px;
  padding: 24px;
  background: #fff;
  border-radius: 8px;
  border: 1px solid rgba(0, 0, 0, 0.08);
}

.legal-contact p {
  margin-bottom: 6px;
}

.legal-contact a {
  color: var(--color-primary);
  text-decoration: underline;
}

.legal-table table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.legal-table th,
.legal-table td {
  padding: 20px 24px;
  font-size: 14px;
  line-height: 1.8;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  text-align: left;
  vertical-align: top;
}

.legal-table th {
  width: 200px;
  font-weight: 600;
  color: var(--color-dark);
  background: #f5f5f8;
  white-space: nowrap;
}

.legal-table td {
  color: var(--color-text);
}

.legal-date {
  margin-top: 60px;
  font-size: 13px;
  color: rgba(0, 0, 0, 0.4);
  text-align: right;
}

/* --- Footer --- */
.footer {
  background: var(--color-dark);
  color: var(--color-white);
  padding: 80px 0 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 60px;
}

.footer-logo {
  font-family: 'Dancing Script', cursive;
  font-size: 24px;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 1px;
  display: inline-block;
  margin-bottom: 16px;
}

.footer-logo span {
  opacity: 0.7;
}

.footer-desc {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.8;
}

.footer-nav h4 {
  font-family: var(--font-en);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 2px;
  margin-bottom: 20px;
  color: var(--color-white);
}

.footer-nav ul li {
  margin-bottom: 10px;
}

.footer-nav ul li a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
  transition: var(--transition);
}

.footer-nav ul li a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 32px;
  text-align: center;
}

.footer-bottom p {
  font-family: var(--font-en);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.3);
  letter-spacing: 1px;
}

/* --- Back to Top --- */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(233, 69, 96, 0.3);
  z-index: 100;
}

.back-to-top svg {
  width: 20px;
  height: 20px;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(233, 69, 96, 0.4);
}

/* ===================================
   Responsive
   =================================== */
@media (max-width: 1024px) {
  .about-grid {
    gap: 40px;
  }

  .service-grid {
    gap: 24px;
  }

  .service-card {
    padding: 36px 28px;
  }
}

@media (max-width: 768px) {
  .sp-only { display: inline; }

  .header {
    padding: 0 20px;
    height: 70px;
  }

  .hamburger { display: block; }

  .nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    min-height: 100vh;
    background: var(--color-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), visibility var(--transition);
    z-index: 999;
    overflow-y: auto;
  }

  .nav.active {
    opacity: 1;
    visibility: visible;
  }

  .nav-list {
    flex-direction: column;
    gap: 24px;
    align-items: center;
  }

  .nav-link {
    font-size: 20px;
    color: var(--color-white) !important;
    display: block;
    text-align: center;
  }

  .has-dropdown {
    text-align: center;
  }

  .dropdown {
    position: static;
    background: transparent;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    transform: none;
    padding: 8px 0 0;
  }

  .dropdown li a {
    color: rgba(255, 255, 255, 0.6);
    padding: 6px 0;
    font-size: 15px;
    text-align: center;
  }

  .section {
    padding: 80px 0;
  }

  .section-header {
    margin-bottom: 48px;
  }

  .hero-desc br { display: none; }

  .hero-content {
    padding-bottom: 120px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .about-image {
    max-width: 400px;
    margin: 0 auto;
  }

  .about-numbers {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .about-number-value {
    font-size: 36px;
  }

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

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

  .flow-steps::before {
    left: 34px;
  }

  .flow-step {
    gap: 24px;
  }

  .flow-step-number {
    width: 70px;
    height: 70px;
    font-size: 20px;
  }

  .company-table th {
    width: 120px;
    padding: 16px;
  }

  .company-table td {
    padding: 16px;
  }

  .contact-form {
    padding: 32px 24px;
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 300px;
  }

  .about-numbers {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

  .section-desc br { display: none; }
}