:root {
    --color-paper: #F6F1E7;
    --color-paper-deep: #EFE9DD;
    --color-indigo: #2E3A50;
    --color-indigo-deep: #1F2A3B;
    --color-black: #17140F;
    --color-gold: #B78A3D;
    --color-rust: #A15C38;
    --color-sand: #E4DED1;
    --color-charcoal: #262220;
    --font-display: 'Zen Old Mincho', serif;
    --font-body: 'Noto Sans JP', sans-serif;
    --font-tag: 'Special Elite', monospace;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    background: var(--color-paper);
    color: var(--color-charcoal);
    font-family: var(--font-body);
    line-height: 1.9;
    overflow-x: hidden;
  }

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

  .ph {
    position: relative;
    width: 100%;
    overflow: hidden;
  }

  .ph img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
  }

  .ph-cutout img {
    object-fit: contain;
  }

  .reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.9s ease, transform 0.9s ease;
  }

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

  .eyebrow {
    font-family: var(--font-tag);
    font-size: 12px;
    letter-spacing: 0.18em;
    color: var(--color-gold);
    text-transform: uppercase;
    display: inline-flex;
    align-items: center;
    gap: 8px;
  }

  .eyebrow::before {
    content: '';
    width: 16px;
    height: 1px;
    background: var(--color-gold);
  }

  .section {
    padding: 100px 24px;
    max-width: 1080px;
    margin: 0 auto;
  }

  /* ===== FV ===== */
  .fv {
    position: relative;
    padding: 56px 0 40px;
    background: var(--color-paper-deep);
    overflow: hidden;
  }

  .fv-head {
    text-align: center;
    padding: 0 24px 40px;
  }

  .fv-head .eyebrow {
    justify-content: center;
  }

  .fv-head .eyebrow::before {
    display: none;
  }

  .fv-head h1 {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(28px, 5vw, 44px);
    letter-spacing: 0.04em;
    margin-top: 16px;
    color: var(--color-charcoal);
  }

  .fv-head p {
    margin-top: 10px;
    font-size: 14px;
    color: rgba(38,34,32,0.7);
  }

  .marquee-track {
    display: flex;
    width: max-content;
    animation: scroll-left 46s linear infinite;
  }

  @keyframes scroll-left {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
  }

  .marquee-track .ph {
    width: 340px;
    height: 460px;
    flex: none;
    margin-right: 16px;
  }

  .fv-note {
    text-align: center;
    margin-top: 28px;
    font-family: var(--font-tag);
    font-size: 12px;
    letter-spacing: 0.1em;
    color: rgba(38,34,32,0.45);
  }

  /* ===== concept ===== */
  .concept-wrap {
    position: relative;
    min-height: 640px;
    display: flex;
    align-items: center;
    overflow: hidden;
  }

  .concept-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
  }

  .concept-bg .ph {
    width: 100%;
    height: 100%;
  }

  .concept-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(23,20,15,0.15) 0%, rgba(23,20,15,0.55) 78%, rgba(23,20,15,0.72) 100%);
  }

  .concept {
    position: relative;
    z-index: 1;
    text-align: center;
    width: 100%;
    color: var(--color-paper);
  }

  .concept .eyebrow {
    justify-content: center;
    color: var(--color-paper);
  }

  .concept .eyebrow::before {
    background: var(--color-paper);
  }

  .concept h2 {
    font-family: var(--font-display);
    font-size: clamp(24px, 4vw, 36px);
    font-weight: 600;
    line-height: 2;
    margin-top: 24px;
    color: var(--color-paper);
  }

  .concept .lead {
    margin-top: 28px;
    font-size: 15px;
    color: rgba(246,241,231,0.85);
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
  }

  .stitch-divider {
    width: 100%;
    max-width: 220px;
    margin: 48px auto 0;
    border-top: 1px dashed rgba(246,241,231,0.5);
    position: relative;
  }

  .stitch-divider::before,
  .stitch-divider::after {
    content: '';
    position: absolute;
    top: -3px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-rust);
  }

  .stitch-divider::before { left: 0; }
  .stitch-divider::after { right: 0; }

  /* ===== story ===== */
  .story-wrap {
    position: relative;
    background: var(--color-black);
    color: var(--color-paper);
    padding: 110px 24px;
    overflow: hidden;
  }

  .story-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    opacity: 0.28;
    mix-blend-mode: luminosity;
  }

  .story-bg .ph {
    width: 100%;
    height: 100%;
    background: var(--color-black);
    border-color: rgba(246,241,231,0.25);
  }

  .story-bg .ph span {
    color: rgba(246,241,231,0.55);
  }

  .story-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(23,20,15,0.55) 0%, rgba(23,20,15,0.9) 100%);
  }

  .story {
    position: relative;
    z-index: 1;
    max-width: 720px;
    margin: 0 auto;
  }

  .story .eyebrow {
    color: var(--color-sand);
  }

  .story .eyebrow::before {
    background: var(--color-sand);
  }

  .story h2 {
    font-family: var(--font-display);
    font-size: clamp(24px, 4vw, 34px);
    font-weight: 600;
    margin: 20px 0 36px;
    letter-spacing: 0.03em;
  }

  .story p {
    font-size: 14.5px;
    color: rgba(246,241,231,0.86);
    margin-bottom: 20px;
  }

  .patch {
    width: 64px;
    height: 64px;
    border: 1px dashed rgba(246,241,231,0.5);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 32px;
    font-family: var(--font-tag);
    font-size: 12px;
    letter-spacing: 0.06em;
    color: var(--color-sand);
    text-align: center;
    line-height: 1.4;
  }

  /* ===== features ===== */
  .features h2 {
    font-family: var(--font-display);
    font-size: clamp(22px, 3.6vw, 30px);
    font-weight: 600;
    margin: 20px 0 56px;
    color: var(--color-charcoal);
  }

  .feature-block {
    padding: 44px 0;
    border-top: 1px dashed rgba(38,34,32,0.28);
  }

  .feature-block:last-child {
    border-bottom: 1px dashed rgba(38,34,32,0.28);
  }

  .feature-head {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 8px;
    margin-bottom: 32px;
  }

  .feature-head > div {
    max-width: 560px;
  }

  .feature-num {
    font-family: var(--font-tag);
    font-size: 20px;
    color: var(--color-gold);
    letter-spacing: 0.05em;
  }

  .feature-head h3 {
    font-family: var(--font-display);
    font-size: 27px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-charcoal);
  }

  .feature-head p {
    font-size: 16px;
    color: rgba(38,34,32,0.72);
  }

  .feature-media {
    padding-left: 0;
  }

  /* point 1: season flatlay, transparent cut-out style */
  .season-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    align-items: end;
  }

  .ph-cutout {
    background: none;
    border: none;
    aspect-ratio: 4 / 5;
    position: relative;
  }

  .season-label {
    text-align: center;
    font-family: var(--font-tag);
    font-size: 12px;
    letter-spacing: 0.08em;
    color: var(--color-gold);
    margin-top: 10px;
  }

  /* point 2: design pair */
  .design-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    max-width: 620px;
    margin: 0 auto;
  }

  .design-grid .ph {
    aspect-ratio: 3 / 4;
  }

  /* point 3: fabric close-up */
  .fabric-media .ph {
    max-width: 900px;
    aspect-ratio: 16 / 9;
    margin: 0 auto;
  }

  /* point 4: leg photos */
  .leg-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    max-width: 620px;
    margin: 0 auto;
  }

  .leg-grid .ph {
    aspect-ratio: 3 / 4;
  }

  /* point 5: patch detail */
  .patch-media .ph {
    max-width: 900px;
    aspect-ratio: 1200 / 675;
    margin: 0 auto;
  }

  /* ===== color ===== */
  .color-section {
    background: var(--color-paper-deep);
  }

  .color-section h2 {
    font-family: var(--font-display);
    font-size: clamp(22px, 3.6vw, 30px);
    font-weight: 600;
    margin: 20px 0 40px;
    color: var(--color-charcoal);
  }

  .color-tabs {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 40px;
  }

  .color-tab {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 18px 10px 12px;
    background: var(--color-paper);
    border: 1px dashed rgba(38,34,32,0.35);
    border-radius: 999px;
    cursor: pointer;
    font-family: var(--font-tag);
    font-size: 12px;
    letter-spacing: 0.06em;
    color: rgba(38,34,32,0.65);
    transition: all 0.3s ease;
  }

  .color-tab .swatch {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 1px solid rgba(0,0,0,0.15);
  }

  .color-tab.active {
    background: var(--color-black);
    color: var(--color-paper);
    border-color: var(--color-black);
  }

  .color-panel {
    display: none;
    grid-template-columns: 1.3fr 1fr;
    gap: 32px;
    align-items: center;
  }

  .color-panel.active {
    display: grid;
    animation: fade-in 0.6s ease;
  }

  @keyframes fade-in {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .color-photos {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
  }

  .color-photos .ph {
    aspect-ratio: 760 / 980;
    min-height: 380px;
  }

  .color-text .eyebrow {
    margin-bottom: 16px;
  }

  .color-text h3 {
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--color-charcoal);
  }

  .color-text p {
    font-size: 13.5px;
    color: rgba(38,34,32,0.75);
  }

  /* ===== care ===== */
  .care h2 {
    font-family: var(--font-display);
    font-size: clamp(22px, 3.6vw, 30px);
    font-weight: 600;
    margin: 20px 0 8px;
    color: var(--color-charcoal);
  }

  .care .lead {
    font-size: 13px;
    color: rgba(38,34,32,0.6);
    margin-bottom: 36px;
  }

  .accordion {
    max-width: 640px;
  }

  .acc-item {
    border-top: 1px dashed rgba(38,34,32,0.3);
  }

  .acc-item:last-child {
    border-bottom: 1px dashed rgba(38,34,32,0.3);
  }

  .acc-trigger {
    width: 100%;
    background: none;
    border: none;
    font-family: var(--font-body);
    font-size: 14.5px;
    font-weight: 500;
    color: var(--color-charcoal);
    padding: 20px 4px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    text-align: left;
  }

  .acc-trigger .icon {
    font-family: var(--font-tag);
    font-size: 16px;
    color: var(--color-gold);
    transition: transform 0.3s ease;
  }

  .acc-item.open .icon {
    transform: rotate(45deg);
  }

  .acc-panel {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
  }

  .acc-panel-inner {
    padding: 0 4px 22px;
    font-size: 13px;
    color: rgba(38,34,32,0.72);
  }

  .acc-panel-inner p {
    margin-bottom: 8px;
  }

  /* ===== campaign ===== */
  .campaign {
    background: var(--color-black);
    padding: 56px 24px;
  }

  .campaign-inner {
    max-width: 640px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
    flex-wrap: wrap;
    border: 1px dashed rgba(246,241,231,0.35);
    padding: 32px 36px;
    position: relative;
  }

  .campaign-inner::before,
  .campaign-inner::after {
    content: '';
    position: absolute;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--color-paper);
    top: 10px;
  }

  .campaign-inner::before { left: 10px; }
  .campaign-inner::after { right: 10px; }

  .campaign-text {
    color: var(--color-paper);
  }

  .campaign-eyebrow {
    font-family: var(--font-tag);
    font-size: 12px;
    letter-spacing: 0.16em;
    color: var(--color-sand);
    margin-bottom: 10px;
  }

  .campaign-off {
    font-family: var(--font-display);
    font-size: clamp(30px, 5vw, 42px);
    font-weight: 600;
    letter-spacing: 0.02em;
  }

  .campaign-limited {
    font-family: var(--font-tag);
    font-size: 12px;
    letter-spacing: 0.1em;
    color: var(--color-sand);
    margin-top: 8px;
  }

  .btn-coupon {
    font-family: var(--font-tag);
    font-size: 12px;
    letter-spacing: 0.12em;
    color: var(--color-gold);
    background: var(--color-paper);
    border: none;
    padding: 15px 28px;
    cursor: pointer;
    white-space: nowrap;
  }

  /* ===== buy ===== */
  .buy {
    padding: 100px 24px 120px;
    text-align: center;
  }

  .buy-inner {
    max-width: 380px;
    margin: 0 auto;
  }

  .buy .ph {
    aspect-ratio: 3 / 4;
    margin-bottom: 28px;
  }

  .buy-num {
    font-family: var(--font-tag);
    font-size: 12px;
    letter-spacing: 0.08em;
    color: var(--color-gold);
  }

  .buy-name {
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 600;
    color: var(--color-charcoal);
    margin: 10px 0 8px;
  }

  .buy-price {
    font-size: 15px;
    color: rgba(38,34,32,0.75);
    margin-bottom: 32px;
  }

  .btn-buy {
    display: inline-block;
    width: 100%;
    font-family: var(--font-tag);
    font-size: 13px;
    letter-spacing: 0.14em;
    color: var(--color-paper);
    background: var(--color-black);
    border: none;
    padding: 18px 0;
    cursor: pointer;
  }

  /* ===== footer ===== */
  .footer-note {
    text-align: center;
    padding: 40px 24px 60px;
    font-family: var(--font-tag);
    font-size: 12px;
    letter-spacing: 0.08em;
    color: rgba(38,34,32,0.4);
  }

  @media (max-width: 768px) {
    .campaign-inner { flex-direction: column; text-align: center; padding: 32px 24px; }
    .btn-coupon { width: 100%; }
    .section { padding: 72px 20px; }
    .story-wrap { padding: 80px 20px; }
    .color-panel.active { grid-template-columns: 1fr; }
    .color-photos .ph { min-height: 260px; }
    .feature-media { margin-top: 20px; }
    .season-grid { grid-template-columns: repeat(2, 1fr); gap: 20px 12px; }
    .design-grid { grid-template-columns: 1fr; }
    .leg-grid { grid-template-columns: 1fr 1fr; max-width: 100%; }
    .concept-wrap { min-height: 480px; }
  }