@charset "UTF-8";
@import url("https://fonts.googleapis.com/css2?family=Zen+Old+Mincho:wght@400;700&display=swap");

/* Setting */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-primary: #111111;
  --color-secondary: #000014;
  --color-key: #d5b655;
  --color-key-hover: #e0b966;
  --color-tertiary: linear-gradient(180deg, #f8f7f3 0%, #f2f0ea 100%);
  --color-white: #fafafa;
  --color-text-main: #d3dbde;
  --color-text-sub: rgba(211, 219, 222, 0.74);
  --color-border: rgba(211, 219, 222, 0.08);
  --color-border-strong: rgba(213, 182, 85, 0.35);
}

body {
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
  line-height: 1.6;
  color: var(--color-text-main);
  background:
    radial-gradient(circle at top left, rgba(213, 182, 85, 0.08), transparent 28%),
    linear-gradient(180deg, #05051c 0%, var(--color-secondary) 100%);
  overflow-x: hidden;
}

section {
  border-bottom: 1px solid var(--color-border);
}

#footermenu {
  padding-bottom: 96px !important;
}

/* Sticky CTA */
.sticky-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(180deg, rgba(8, 8, 28, 0.96) 0%, rgba(0, 0, 20, 0.98) 100%);
  color: var(--color-text-main);
  border-top: 1px solid var(--color-border-strong);
  z-index: 9998;
  transform: translateY(100%);
  transition: transform 0.5s ease;
  box-shadow: 0 -2px 15px rgba(0, 0, 0, 0.3);
}

.sticky-cta.show {
  transform: translateY(0);
}

.sticky-cta-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.sticky-cta-text {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.sticky-cta-title {
  font-family: "Zen Old Mincho", "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-weight: 600;
  color: var(--color-key);
}

.sticky-cta-subtitle {
  font-size: 0.9rem;
  opacity: 0.9;
}

.sticky-cta-btn {
  background: var(--color-key);
  color: var(--color-primary);
  border: 2px solid var(--color-key);
  padding: 0.8rem 2rem;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.3s ease;
}

.sticky-cta-btn:hover {
  background: var(--color-key-hover);
  transform: translateY(-1px);
}

/* Hero CTA Buttons */
.hero-cta {
  margin-top: 1rem;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.hero-btn {
  padding: 1rem 2.5rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 500;
  transition: all 0.3s ease;
  min-width: 160px;
}

.hero-btn.primary {
  background: var(--color-key);
  color: var(--color-primary);
}

.hero-btn.primary:hover {
  background: var(--color-key-hover);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(213, 182, 85, 0.35);
}

.hero-btn.secondary {
  background: transparent;
  color: var(--color-key);
  border: 2px solid rgba(213, 182, 85, 0.45);
}

.hero-btn.secondary:hover {
  background: rgba(213, 182, 85, 0.1);
  border-color: rgba(213, 182, 85, 0.65);
}

/* Product Buttons */
.product-btn {
  background: transparent;
  color: var(--color-key);
  border: 2px solid rgba(213, 182, 85, 0.45);
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.3s ease;
  margin-top: 1.5rem;
  width: 100%;
}

.product-btn a {
  display: block;
  color: var(--color-key);
  text-decoration: none;
  padding: 0.8rem 2rem;
  cursor: pointer;
  width: 100%;
}

.product-btn:hover {
  background: rgba(213, 182, 85, 0.1);
  border-color: var(--color-key);
  color: var(--color-key-hover);
  transform: translateY(-1px);
}

.final-card-dark .product-btn {
  background: var(--color-key);
  color: var(--color-primary);
  border-color: var(--color-key);
}

.final-card-dark .product-btn a {
  color: var(--color-primary);
}

.final-card-dark .product-btn:hover {
  background: var(--color-key-hover);
}

.final-card-dark .product-btn:hover a {
  color: var(--color-primary);
}

/* New Button Style */
.series-btn {
  display: block;
  width: 30%;
  margin: 1em auto 0;
  background: transparent;
  color: var(--color-key);
  border: 2px solid rgba(213, 182, 85, 0.45);
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.3s ease;
}

.series-btn a {
  display: block;
  color: var(--color-key);
  text-decoration: none;
  padding: 0.8rem 2rem;
  cursor: pointer;
  width: 100%;
}

.series-btn:hover {
  background: rgba(213, 182, 85, 0.1);
  border-color: var(--color-key);
  transform: translateY(-1px);
}

.series-btn:hover a {
  color: var(--color-key-hover);
}

/* Loading Screen */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--color-secondary);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-content {
  text-align: center;
  color: white;
}

.loading-spinner {
  width: 50px;
  height: 50px;
  border: 3px solid rgba(211, 219, 222, 0.3);
  border-radius: 50%;
  border-top-color: var(--color-key);
  animation: spin 1s ease-in-out infinite;
  margin: 0 auto 20px;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

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

.container {
  max-width: 980px !important;
  margin: 0 auto !important;
  padding: 0 20px !important;
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  background: linear-gradient(135deg, rgba(0, 0, 20, 0.88), rgba(10, 10, 40, 0.46));
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
}

.hero-image video,
.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 1.0;
}

.hero-content {
  position: relative;
  z-index: 2;
  color: white;
  max-width: 600px;
  margin-left: 5%;
}

.hero-title {
  font-family: "Zen Old Mincho", "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: 3.5rem;
  font-weight: 300;
  line-height: 1.5;
  margin-bottom: 1.5rem;
  letter-spacing: 0.05em;
}

.hero-subtitle {
  font-size: 0.75rem;
  margin-bottom: 3rem;
  color: var(--color-text-sub);
  line-height: 1.8;
}

.hero-brand {
  margin-top: 4rem;
  font-family: "Zen Old Mincho", "Yu Mincho", "Hiragino Mincho ProN", serif;
}

.brand-text {
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  opacity: 0.8;
  display: block;
  margin-bottom: 0.5rem;
}

.collection-title {
  font-size: 1.8rem;
  font-weight: 400;
  color: var(--color-key);
  letter-spacing: 0.15em;
}

/* Navigation Arrows */
.nav-arrows {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1000;
  width: 100%;
  pointer-events: none;
}

.nav-arrow {
  position: absolute;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: white;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  pointer-events: all;
  font-size: 1.5rem;
}

.nav-arrow:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.1);
}

.nav-arrow-left {
  left: 30px;
}

.nav-arrow-right {
  right: 30px;
}

/* Content Sections */
.content-section {
  background: linear-gradient(180deg, rgba(8, 8, 28, 0.9) 0%, rgba(0, 0, 20, 0.92) 100%);
  padding: 8rem 0;
  color: var(--color-text-main);
}

.section-label {
  font-size: 0.9rem;
  color: var(--color-text-sub);
  margin-bottom: 2rem;
  letter-spacing: 0.1em;
}

.section-title {
  font-family: "Zen Old Mincho", "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: 2.5rem;
  font-weight: 300;
  line-height: 1.3;
  margin-bottom: 3rem;
  color: var(--color-key);
}

.text-content {
  max-width: 800px;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text-sub);
}

.text-content p {
  margin-bottom: 1.5rem;
}

/* Choices Section */
.choices-section {
  background: linear-gradient(180deg, rgba(8, 8, 28, 0.94) 0%, rgba(0, 0, 20, 0.96) 100%);
  padding: 8rem 0;
}

.choices-intro {
  text-align: center;
  margin-bottom: 2.5rem;
}

.choices-subtitle {
  font-size: 1rem;
  color: var(--color-text-sub);
  margin-bottom: 1rem;
}

.choices-title {
  font-family: "Zen Old Mincho", "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: 2.5rem;
  font-weight: 300;
  margin-bottom: 2rem;
  color: var(--color-key);
}

.choices-description {
  max-width: 600px;
  margin: 0 auto;
  color: var(--color-text-sub);
  line-height: 1.8;
}

.choices-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  max-width: 1000px;
  margin: 0 auto;
}

.choices-card {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.3s ease;
}

.choices-card:hover {
  transform: translateY(-5px);
}

.choices-card-light {
  background: var(--color-tertiary);
  color: #333333;
}

.choices-card-dark {
  background: linear-gradient(180deg, rgba(10, 10, 36, 0.94) 0%, rgba(0, 0, 20, 0.97) 100%);
  color: var(--color-text-main);
}

.choices-card-light .product-btn,
.choices-card-dark .product-btn {
  background: var(--color-key);
  color: var(--color-primary);
  border-color: var(--color-key);
}

.choices-card-light .product-btn a,
.choices-card-dark .product-btn a {
  color: var(--color-primary);
}

.choices-card-light .product-btn:hover,
.choices-card-dark .product-btn:hover {
  background: var(--color-key-hover);
}

.choices-card-light .product-btn:hover a,
.choices-card-dark .product-btn:hover a {
  color: var(--color-primary);
}

.choices-card .series-btn {
  width: 100%;
  max-width: none;
}

.choices-card .series-btn a {
  padding-left: 1.5rem;
  padding-right: 1.5rem;
  white-space: nowrap;
}

.card-content {
  padding: 2.5rem 2rem;
  text-align: center;
}

.card-image-placeholder {
  width: 100%;
  height: auto;
  background: transparent;
  border-radius: 4px;
  margin: 2rem 0;
  border: none;
  overflow: hidden;
}

.choices-card-dark .card-image-placeholder {
  border-color: var(--color-border-strong);
}

.card-image-placeholder img {
  display: block;
  width: 100%;
  height: auto;
}

.card-price {
  margin-top: 2rem;
}

.price-label {
  display: block;
  font-size: 0.9rem;
  opacity: 0.7;
  margin-bottom: 0.5rem;
}

.price {
  font-family: "Zen Old Mincho", "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-key);
}

.price-note {
  font-size: 0.9rem;
  opacity: 0.7;
}

/* Final Section */
.final-section {
  background: linear-gradient(180deg, rgba(8, 8, 28, 0.9) 0%, rgba(0, 0, 20, 0.93) 100%);
  padding: 8rem 0;
}

.final-intro {
  text-align: center;
  margin-bottom: 2.5rem;
}

.final-subtitle {
  font-size: 1rem;
  color: var(--color-text-sub);
  margin-bottom: 1rem;
}

.final-title {
  font-family: "Zen Old Mincho", "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: 2.5rem;
  font-weight: 300;
  margin-bottom: 2rem;
  color: var(--color-key);
}

.final-description {
  max-width: 760px;
  margin: 0 auto;
  color: var(--color-text-sub);
  line-height: 1.8;
}

.final-cards {
  display: grid;
  grid-template-columns: 1fr;
  max-width: 980px;
  margin: 0 auto;
}

.final-card {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 2.5rem;
  padding: 3.5rem;
  border-radius: 8px;
  text-align: left;
  transition: transform 0.3s ease;
  overflow: hidden;
}

.final-card:hover {
  transform: translateY(-5px);
}

.final-card-light {
  background: linear-gradient(180deg, #f8f7f3 0%, #efece3 100%);
  color: #2c2921;
  border: 1px solid rgba(44, 41, 33, 0.12);
}

.final-card-light::before {
  content: "";
  position: absolute;
  top: 18px;
  right: 18px;
  bottom: 18px;
  left: 18px;
  border: 1px solid rgba(213, 182, 85, 0.35);
  pointer-events: none;
}

.final-card-dark {
  background: linear-gradient(180deg, rgba(10, 10, 36, 0.94) 0%, rgba(0, 0, 20, 0.97) 100%);
  color: var(--color-text-main);
  border: 1px solid var(--color-border);
}

.card-brand {
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  opacity: 0.7;
  display: block;
  margin-bottom: 1rem;
}

.card-title {
  font-family: "Zen Old Mincho", "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: 1.2rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  margin-bottom: 1.5rem;
}

.card-description {
  line-height: 1.6;
  opacity: 0.9;
}

.final-card .card-header {
  position: relative;
  z-index: 1;
  grid-column: 1 / -1;
  text-align: center;
  margin-bottom: 2.5rem;
}

.final-card .card-title {
  font-size: 1.65rem;
  line-height: 1.6;
  margin-bottom: 0;
}

.final-card .card-contents {
  position: relative;
  z-index: 1;
  padding: 1.75rem 0;
  border-top: 1px solid rgba(44, 41, 33, 0.14);
}

.final-card .card-contents h4 {
  position: relative;
  font-family: "Zen Old Mincho", "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: 1.15rem;
  font-weight: 500;
  color: #2c2921;
  margin-bottom: 0.8rem;
  padding-left: 1.4rem;
  line-height: 1.6;
}

.final-card .card-contents h4::before {
  content: "";
  position: absolute;
  top: 0.62em;
  left: 0;
  width: 0.62rem;
  height: 0.62rem;
  background: var(--color-key);
  transform: rotate(45deg);
  box-shadow: 0 0 0 4px rgba(213, 182, 85, 0.16);
}

.final-card .card-contents p {
  color: rgba(44, 41, 33, 0.82);
  line-height: 1.8;
  margin-bottom: 1rem;
}

.final-card .card-contents ul {
  display: grid;
  gap: 0.65rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.final-card .card-contents li {
  position: relative;
  padding-left: 1.2rem;
  color: rgba(44, 41, 33, 0.9);
  line-height: 1.7;
}

.final-card .card-contents li::before {
  content: "";
  position: absolute;
  top: 0.75em;
  left: 0;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--color-key);
}

.final-card .card-description {
  position: relative;
  z-index: 1;
  grid-column: 1 / -1;
  margin-top: 1.5rem;
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.48);
  border: 1px solid rgba(213, 182, 85, 0.28);
  color: rgba(44, 41, 33, 0.9);
  line-height: 1.9;
}

.final-btn {
  background: transparent;
  color: var(--color-key);
  border: 2px solid rgba(213, 182, 85, 0.45);
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.3s ease;
  margin: 2rem auto 0;
  width: 100%;
  max-width: 520px;
  display: block;
  position: relative;
  z-index: 1;
  grid-column: 1 / -1;
}
.final-btn a {
  display: block;
  color: var(--color-key);
  text-decoration: none;
  padding: 1rem 2rem;
  cursor: pointer;
  width: 100%;
}

.final-btn:hover {
  background: rgba(213, 182, 85, 0.1);
  border-color: var(--color-key);
  color: var(--color-key-hover);
  transform: translateY(-1px);
}

.final-card-dark .final-btn {
  background: var(--color-key);
  color: var(--color-primary);
  border-color: var(--color-key);
}

.final-card-dark .final-btn a {
  color: var(--color-primary);
}

.final-card-dark .final-btn:hover {
  background: var(--color-key-hover);
}

.final-card-dark .final-btn:hover a {
  color: var(--color-primary);
}

.final-card-light .card-brand {
  color: rgba(44, 41, 33, 0.72);
  opacity: 1;
}

.final-card-light .card-title {
  color: #2c2921;
}

.final-card-light .card-description {
  color: rgba(44, 41, 33, 0.9);
  opacity: 1;
}

.final-card-light .final-btn {
  background: var(--color-key);
  color: var(--color-primary);
  border-color: var(--color-key);
}

.final-card-light .final-btn a {
  color: var(--color-primary);
}

.final-card-light .final-btn:hover {
  background: var(--color-key-hover);
  border-color: var(--color-key-hover);
}

.final-card-light .final-btn:hover a {
  color: var(--color-primary);
}

/* About Section */
.about-section {
  background: linear-gradient(180deg, rgba(8, 8, 28, 0.92) 0%, rgba(0, 0, 20, 0.95) 100%);
  padding: 8rem 0;
}

.about-section .container {
  max-width: 900px;
}

.about-section .about-subtitle,
.about-section .about-title {
  text-align: center;
}

.about-body {
  margin-top: 2.5rem;
  padding: 3rem 2.5rem;
  background: linear-gradient(180deg, rgba(0, 0, 20, 0.72) 0%, rgba(8, 8, 28, 0.88) 100%);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  position: relative;
}

.about-body::before {
  content: "";
  position: absolute;
  top: 18px;
  bottom: 18px;
  left: 0;
  width: 2px;
  background: rgba(213, 182, 85, 0.35);
}

.about-image-wrap {
  width: 100%;
  margin: 0 auto 2.5rem;
  padding: 2rem 1.5rem;
  background: linear-gradient(180deg, rgba(0, 0, 20, 0.78) 0%, rgba(8, 8, 28, 0.9) 100%);
  border: 1px solid var(--color-border);
  border-radius: 10px;
}

.about-image-wrap img {
  display: block;
  width: 100%;
  max-width: 280px;
  margin: 0 auto;
}

.about-section h3 {
  font-family: "Zen Old Mincho", "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: 1.8rem;
  font-weight: 300;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--color-key);
  text-align: center;
  margin: 0 0 2.5rem;
}

.about-section h4 {
  font-family: "Zen Old Mincho", "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: 1.3rem;
  font-weight: 400;
  line-height: 1.6;
  letter-spacing: 0.03em;
  color: var(--color-text-main);
  margin: 3rem 0 1rem;
}

.about-section p {
  color: var(--color-text-sub);
  line-height: 2;
  letter-spacing: 0.02em;
}

/* Product Showcase Section */
.product-showcase-section {
  background: linear-gradient(180deg, rgba(8, 8, 28, 0.9) 0%, rgba(0, 0, 20, 0.93) 100%);
  padding: 8rem 0;
}

.showcase-intro {
  text-align: center;
  margin-bottom: 2.5rem;
}

.showcase-subtitle {
  font-size: 1rem;
  color: var(--color-text-sub);
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
}

.about-subtitle {
  font-size: 1rem;
  color: var(--color-text-sub);
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
}

.showcase-title {
  font-family: "Zen Old Mincho", "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: 2.5rem;
  font-weight: 300;
  margin-bottom: 2rem;
  color: var(--color-key);
  line-height: 1.3;
}

.about-title {
  font-family: "Zen Old Mincho", "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: 2.5rem;
  font-weight: 300;
  margin-bottom: 2rem;
  color: var(--color-key);
  line-height: 1.3;
}

.showcase-description {
  max-width: 700px;
  margin: 0 auto;
  color: var(--color-text-sub);
  line-height: 1.8;
  font-size: 1rem;
}

.product-modules {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
  max-width: 1200px;
  margin: 0 auto;
}

.product-module {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  height: 100%;
  min-height: 168px;
  background: rgba(0, 0, 20, 0.88);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
  align-items: stretch;
}

.product-module:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.module-image {
  position: relative;
  overflow: hidden;
  height: 196px;
  display: flex;
  align-items: stretch;
  flex-shrink: 0;
}

.image-placeholder {
  width: 100%;
  height: 100%;
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.image-placeholder img {
  width: 100%;
  height: 100%;
  padding: 24px 16px;
  box-sizing: border-box;
  object-fit: contain;
  object-position: center;
}

.image-placeholder._logo_image img {
  width: 120%;
  height: 100%;
  padding: 16px 16px 0 16px;
  object-fit: cover;
  object-position: center;
}

.module-content {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  flex: 1;
  justify-content: flex-start;
  height: 100%;
}

.module-title {
  font-family: "Zen Old Mincho", "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-text-main);
  margin-bottom: 0.5rem;
  line-height: 1.4;
  letter-spacing: 0.02em;
  min-height: 2.8em;
}

.module-subtitle {
  font-size: 0.75rem;
  color: var(--color-text-sub);
  margin-bottom: 1rem;
  font-weight: 300;
  letter-spacing: 0.05em;
  line-height: 1.5;
  min-height: 2.25em;
}

.module-description {
  margin-bottom: 2rem;
}

.description-lead {
  font-size: 0.95rem;
  color: var(--color-text-main);
  margin-bottom: 1rem;
  font-weight: 500;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0.5rem;
  letter-spacing: 0.05em;
}

.description-text {
  font-size: 0.9rem;
  color: var(--color-text-sub);
  line-height: 1.7;
  letter-spacing: 0.02em;
}

.module-links {
  display: flex;
  gap: 2rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.module-link {
  color: var(--color-key);
  text-decoration: none;
  font-size: 0.85rem;
  transition: all 0.3s ease;
  position: relative;
  letter-spacing: 0.02em;
}

.module-link:hover {
  color: var(--color-key-hover);
}

.module-link::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-key);
  transition: width 0.3s ease;
}

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

.module-btn {
  display: block;
  background: transparent;
  color: var(--color-key);
  width: 100%;
  border: 1px solid rgba(213, 182, 85, 0.45);
  padding: 0.8rem 1.5rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 400;
  margin-top: auto;
  transition: all 0.3s ease;
  align-self: flex-start;
  letter-spacing: 0.05em;
}
.module-btn a {
  text-decoration: none;
  color: var(--color-key);
}

.module-btn:hover {
  background: rgba(213, 182, 85, 0.1);
  color: var(--color-key-hover);
  border-color: var(--color-key);
  transform: translateY(-1px);
}
.module-btn:hover a {
  color: var(--color-key-hover);
}

/* background module */
.background-module {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 100vw;
  height: 100vh;
  position: fixed;
  top: 0;
  z-index: -5;
  background: transparent;
  padding-left: 10vw;
}
.background-module img {
  width: 100%;
}

/* Responsive Design */
@media (max-width: 768px) {

  .container {
    padding: 0 15px !important;
  }

  .background-module img {
    width: 140vw;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-content {
    margin-left: 0;
    padding: 0 20px;
    text-align: left;
  }

  .hero-btn {
    min-width: 140px;
    padding: 0.8rem 2rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .choices-title,
  .final-title {
    font-size: 2rem;
  }

  .choices-cards,
  .final-cards {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .final-card {
    grid-template-columns: 1fr;
    padding: 2.5rem 1.5rem;
  }

  .final-card-light::before {
    top: 12px;
    right: 12px;
    bottom: 12px;
    left: 12px;
  }

  .final-card .card-header {
    margin-bottom: 1.5rem;
  }

  .final-card .card-title {
    font-size: 1.35rem;
  }

  .final-card .card-contents {
    padding: 1.4rem 0;
  }

  .final-card .card-description {
    padding: 1.2rem;
  }

  .nav-arrow {
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
  }

  .nav-arrow-left {
    left: 15px;
  }

  .nav-arrow-right {
    right: 15px;
  }

  .content-section,
  .choices-section,
  .final-section,
  .about-section {
    padding: 4rem 0;
  }

  .sticky-cta-content {
    flex-direction: row;
    gap: 1rem;
    text-align: left;
    align-items: center;
  }

  .sticky-cta-subtitle {
    font-size: 0.7rem;
  }

  .product-module {
    gap: 0;
  }

  .module-content {
    padding: 2rem;
  }

  .module-links {
    flex-direction: column;
    gap: 1rem;
  }

  .showcase-title {
    font-size: 2rem;
  }

  .product-modules {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
  }

  .series-btn {
    width: 80%;
  }

  .about-section .container {
    max-width: 100%;
  }

  .about-body {
    margin-top: 2rem;
    padding: 2.2rem 1.2rem;
  }

  .about-body::before {
    top: 14px;
    bottom: 14px;
  }

  .about-image-wrap {
    max-width: 100%;
    padding: 1.6rem 1rem;
    margin-bottom: 2rem;
  }

  .about-section h3 {
    font-size: 1.5rem;
    margin-bottom: 2rem;
  }

  .about-section h4 {
    font-size: 1.15rem;
    margin-top: 2.2rem;
  }

  .about-section p {
    line-height: 1.9;
  }

}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

  .section-title,
  .choices-title,
  .final-title {
    font-size: 1.8rem;
  }

  .choices-card,
  .card-content {
    padding: 2rem 1.5rem;
  }

  .hero-btn {
    width: 100%;
    max-width: 280px;
  }

  .module-content {
    padding: 1rem;
  }

  .module-title {
    font-size: 1rem;
  }

  .product-showcase-section {
    padding: 4rem 0;
  }

  .about-section h3 {
    font-size: 1.3rem;
  }

  .about-section h4 {
    font-size: 1.05rem;
  }

  .about-image-wrap img {
    max-width: 230px;
  }
}