.why-section { position: relative; overflow: hidden; background: #fff; isolation: isolate; color: #25392e; padding-block: 100px; }
.why-heading { display: grid; grid-template-columns: 1.4fr .6fr; align-items: end; gap: 80px; margin-bottom: 64px; }
.why-heading h2 { font-size: clamp(44px,5.7vw,88px); line-height: 1.06; letter-spacing: -.055em; margin: 0; }
.why-heading h2 > span { display: block; }
.why-heading h2 .why-title-accent { color: #7a956a; padding-left: 3vw; }
.why-introduction { font-size: 14px; line-height: 1.85; color: #617263; margin: 0; max-width: 350px; padding-bottom: 6px; }
.why-composition { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(45px,6vw,100px); align-items: center; }
.why-visual { position: relative; margin: 0; overflow: hidden; border-radius: 4px 110px 4px 4px; height: 610px; background: #28372f; }
.why-scene { position: absolute; inset: 0; opacity: 0; clip-path: inset(0 100% 0 0); transition: opacity .7s ease, clip-path 1.1s cubic-bezier(.16,1,.3,1); pointer-events: none; }
.why-scene.is-active { opacity: 1; clip-path: inset(0); z-index: 1; }
.why-scene img { width: 100%; height: 100%; object-fit: cover; object-position: 62% center; transform: scale(1.07); transition: transform 7s linear; }
.why-scene.is-active img { transform: scale(1); }
.why-scene::after { content: ''; position: absolute; inset: 40% 0 0; background: linear-gradient(transparent,#15261ce0); }
.why-scene figcaption { position: absolute; left: 36px; right: 24px; bottom: 43px; z-index: 1; color: #fff; font-size: clamp(29px,3vw,46px); line-height: 1.15; letter-spacing: -.045em; transform: translateY(20px); opacity: 0; transition: transform .8s .25s, opacity .8s .25s; }
.why-scene.is-active figcaption { opacity: 1; transform: translateY(0); }
.why-scene figcaption span { display: block; }
.why-scene figcaption span:last-child { color: #e4c893; }
.why-visual-line { position: absolute; left: 36px; top: 36px; z-index: 3; height: 54px; width: 54px; border-top: 1px solid #fff8; border-left: 1px solid #fff8; }
.why-visual-index { position: absolute; bottom: 36px; right: 30px; z-index: 3; display: flex; gap: 8px; color: #fff; font-size: 10px; letter-spacing: .12em; }
.why-visual-index > span:last-child { color: #ffffff80; }
.why-grid { display: flex; flex-direction: column; gap: 16px; }
.why-card { position: relative; overflow: hidden; background: #ffffff60; border: 1px solid #61726325; border-radius: 6px; color: #25392e; transition: background .5s, color .5s, box-shadow .5s; }
.why-card.is-active { background: #294337; color: #fff; box-shadow: 0 14px 32px #1c392919; border-color: #294337; }
.why-card h3 { margin: 0; }
.why-select { display: grid; grid-template-columns: 45px 1fr 22px; align-items: center; gap: 18px; text-align: left; width: 100%; color: inherit; background: transparent; border: 0; padding: 27px; }
.why-select:focus-visible { outline-offset: -5px; }
.why-card-index { font-size: 35px; font-weight: 400; letter-spacing: -.06em; color: #96a680; transition: color .5s; }
.why-card.is-active .why-card-index { color: #e0c38d; }
.why-card-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.why-number { color: #7d8a70; font-size: 9px; letter-spacing: .15em; }
.why-card.is-active .why-number { color: #d8c392; }
.why-icon { width: 28px; height: 28px; color: #9baf85; }
.why-card.is-active .why-icon { color: #e0c38d; }
.why-icon path { stroke: currentColor; stroke-width: 1.3; stroke-linecap: round; stroke-linejoin: round; }
.why-card-title { font-size: clamp(23px,2vw,31px); line-height: 1.2; font-weight: 400; letter-spacing: -.04em; }
.why-toggle-mark { font-size: 24px; color: #849775; transition: transform .45s; }
.why-card.is-active .why-toggle-mark { color: #e0c38d; transform: rotate(45deg); }
.why-description { display: grid; grid-template-rows: 1fr; transition: grid-template-rows .65s cubic-bezier(.16,1,.3,1), opacity .45s; }
.why-description > div { overflow: hidden; min-height: 0; }
.why-description p { font-size: 13px; line-height: 1.85; margin: 0; padding: 0 27px 28px 90px; color: #617263; }
.why-card.is-active .why-description p { color: #d1dcd2; }
.why-interactive .why-card:not(.is-active) .why-description { grid-template-rows: 0fr; opacity: 0; }
.why-card-line { position: absolute; bottom: 0; left: 0; right: 0; height: 2px; background: #ffffff15; }
.why-card-line::after { content: ''; position: absolute; inset: 0; background: #dfc48e; transform-origin: left; transform: scaleX(0); }
.why-autoplay .why-card.is-active .why-card-line::after { animation: why-value-progress 7s linear both; }
.why-autoplay.is-paused .why-card-line::after { animation-play-state: paused; }
[data-why-reveal] { transition: opacity .9s ease, transform .9s cubic-bezier(.2,.7,.2,1), background .5s, color .5s; }
.why-card:nth-child(2) { transition-delay: .08s; }
.why-card:nth-child(3) { transition-delay: .16s; }
.why-visual.about-reveal-pending .why-scene { clip-path: inset(100% 0 0); }
.why-visual.about-is-visible { animation: why-visual-open 1.5s cubic-bezier(.16,1,.3,1) both; }
@keyframes why-value-progress { to { transform: scaleX(1); } }
@keyframes why-visual-open { from { clip-path: inset(100% 0 0); } to { clip-path: inset(0); } }
@media (max-width:1100px) { .why-section { padding-block: 76px; } .why-heading { gap: 40px; margin-bottom: 46px; } .why-composition { gap: 36px; } .why-select { padding: 22px; gap: 12px; grid-template-columns: 36px 1fr 18px; } .why-description p { padding: 0 22px 24px 70px; } .why-card-index { font-size: 30px; } .why-visual { height: 580px; } }
@media (max-width:800px) { .why-heading { grid-template-columns: 1fr; gap: 24px; } .why-heading h2 .why-title-accent { padding-left: 0; } .why-introduction { max-width: 480px; } .why-composition { grid-template-columns: 1fr; gap: 28px; } .why-visual { height: 440px; } .why-scene img { object-position: center; } .why-scene figcaption { font-size: 37px; } .why-card:nth-child(2), .why-card:nth-child(3) { transition-delay: 0s; } }
@media (max-width:600px) { .why-section { padding-block: 56px; } .why-heading h2 { font-size: clamp(38px,10vw,52px); } .why-introduction { font-size: 13px; } .why-visual { height: 410px; border-top-right-radius: 75px; } .why-scene figcaption { left: 24px; bottom: 34px; font-size: 30px; right: 50px; } .why-visual-index { bottom: 21px; right: 20px; } .why-visual-line { left: 24px; top: 24px; width: 40px; height: 40px; } .why-select { padding: 20px; } .why-card-title { font-size: 23px; } .why-description p { padding: 0 20px 24px 68px; font-size: 12px; } }
@media (prefers-reduced-motion:reduce) { .why-section *, .why-section *::after { animation: none !important; transition: none !important; } .why-visual.about-reveal-pending { clip-path: none; } }

/* White architectural backdrop: drifting linework and a warm light wash. */
.why-section > .container { position: relative; z-index: 1; }
.why-section::before, .why-section::after { content: ''; position: absolute; pointer-events: none; z-index: 0; }
.why-section::before { inset: -15% -12%; background-image: linear-gradient(90deg, #bda16c1c 1px, transparent 1px), linear-gradient(#bda16c1c 1px, transparent 1px); background-size: 110px 110px; mask-image: linear-gradient(90deg, transparent 25%, #000 80%); transform: rotate(-12deg); animation: why-blueprint-drift 22s ease-in-out infinite alternate; }
.why-section::after { inset: -12%; background: radial-gradient(ellipse at 88% 28%, #eadcc04d, transparent 42%), radial-gradient(ellipse at 42% 90%, #d9dee329, transparent 40%); animation: why-light-drift 16s ease-in-out infinite alternate; }
.why-section::before, .why-section::after { animation-play-state: paused; }
.why-bg-active::before, .why-bg-active::after { animation-play-state: running; }
.why-card { background: #fffffff0; backdrop-filter: blur(8px); }
.why-card.is-active { background: #294337; }
@keyframes why-blueprint-drift { from { transform: translate(-18px, -12px) rotate(-12deg); } to { transform: translate(36px, 28px) rotate(-8deg); } }
@keyframes why-light-drift { from { transform: translate(-3%, -2%) scale(1); opacity: .65; } to { transform: translate(4%, 3%) scale(1.08); opacity: 1; } }
@media (max-width:600px) { .why-section::before { background-size: 80px 80px; opacity: .65; } }
@media (prefers-reduced-motion:reduce) { .why-section::before, .why-section::after { animation: none !important; } }