html,
body {
    margin: 0;
    padding: 0;
    background: #ffffff;
    color: #181d21;
    font-family:
        "Pretendard",
        "Noto Sans KR",
        -apple-system,
        BlinkMacSystemFont,
        "Apple SD Gothic Neo",
        "Segoe UI",
        sans-serif;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    line-height: 1.5;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

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

a {
    color: inherit;
    text-decoration: none;
}

button,
input,
select,
textarea {
    font: inherit;
}

ul,
ol {
    margin: 0;
    padding: 0;
    list-style: none;
}

main {
    display: block;
}

.seller-shell {
    width: min(1280px, calc(100vw - 48px));
    margin: 0 auto;
}

.seller-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(24, 29, 33, 0.08);
    background: rgba(255, 255, 255, 0.94);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
}

.seller-header__desktop,
.seller-header__mobile {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    min-height: 88px;
}

.seller-header__brand {
    flex: 0 0 auto;
}

.seller-header__logo {
    width: 160px;
    height: auto;
}

.seller-header__nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(18px, 2.2vw, 42px);
    flex: 1 1 auto;
}

.seller-header__nav a,
.thecast-mobile-nav-links a {
    position: relative;
    display: inline-flex;
    align-items: center;
    min-height: 40px;
    color: #181d21;
    font-size: 15px;
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.seller-header__nav a::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 2px;
    height: 2px;
    border-radius: 999px;
    background: #aac0ad;
    opacity: 0;
    transform: scaleX(0.7);
    transition: opacity 0.22s ease, transform 0.22s ease;
}

.seller-header__nav a:hover::after,
.seller-header__nav a:focus-visible::after {
    opacity: 1;
    transform: scaleX(1);
}

.seller-header__actions,
.seller-header__mobile-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    flex: 0 0 auto;
}

.seller-locale-switcher {
    position: relative;
}

.seller-locale-switcher__button {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    min-height: 40px;
    padding: 0 2px;
    border: 0;
    background: transparent;
    color: #181d21;
    cursor: pointer;
}

.seller-locale-switcher__icon {
    width: 18px;
    height: 18px;
    flex: 0 0 auto;
}

.seller-locale-switcher__current,
.seller-locale-switcher__option {
    color: #181d21;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.seller-locale-switcher__chevron {
    width: 14px;
    height: 14px;
    flex: 0 0 auto;
    transition: transform 0.18s ease;
}

.seller-locale-switcher.is-open .seller-locale-switcher__chevron {
    transform: rotate(180deg);
}

.seller-locale-switcher__button:hover,
.seller-locale-switcher__button:focus-visible,
.seller-locale-switcher__button:active,
.seller-locale-switcher.is-open .seller-locale-switcher__button {
    background: transparent !important;
    border-color: transparent !important;
    box-shadow: none !important;
    color: #111111;
    outline: none;
}

.seller-locale-switcher__menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    display: grid;
    min-width: 88px;
    padding: 8px;
    border: 1px solid rgba(24, 29, 33, 0.08);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 16px 32px rgba(24, 29, 33, 0.12);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: opacity 0.18s ease, visibility 0.18s ease, transform 0.18s ease;
    pointer-events: none;
}

.seller-locale-switcher.is-open .seller-locale-switcher__menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
}

.seller-locale-switcher__option {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 38px;
    padding: 0 12px;
    border: 0;
    border-radius: 12px;
    background: transparent;
    cursor: pointer;
}

.seller-locale-switcher__option:hover,
.seller-locale-switcher__option:focus-visible,
.seller-locale-switcher__option[aria-checked="true"] {
    background: rgba(170, 192, 173, 0.18);
    color: #111111;
    outline: none;
}

.seller-header__cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 18px;
    border-radius: 999px;
    background: #181d21;
    color: #ffffff;
    box-shadow: 0 12px 28px rgba(24, 29, 33, 0.12);
}

.seller-header__cta:hover,
.seller-header__cta:focus-visible {
    background: #aac0ad;
    color: #111111;
    outline: none;
}

.seller-header__menu-button {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    width: 42px;
    height: 42px;
    padding: 0;
    border: 0;
    background: transparent;
    color: #181d21;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    -webkit-tap-highlight-color: transparent;
}

.seller-header__menu-button:hover,
.seller-header__menu-button:focus-visible,
.seller-header__menu-button:active,
.seller-header__menu-button[aria-expanded="true"] {
    background: transparent !important;
    border-color: transparent !important;
    box-shadow: none !important;
    color: #181d21;
    outline: none;
}

.seller-header__menu-button span {
    display: block;
    width: 18px;
    height: 2px;
    margin-left: auto;
    background: currentColor;
    border-radius: 999px;
}

.seller-header__menu-button span:nth-child(2) {
    width: 14px;
}

.seller-header__menu-button span:nth-child(3) {
    width: 10px;
}

.seller-hero {
    position: relative;
    overflow: hidden;
    background: linear-gradient(180deg, #ffffff 0%, #fbfcfa 100%);
}

.seller-hero::before {
    content: none;
}

.seller-hero__inner {
    position: relative;
    z-index: 1;
    padding: 82px 0 64px;
}

.seller-hero__copy {
    position: relative;
    z-index: 4;
}

.seller-hero__showcase {
    position: relative;
    margin-top: 112px;
    z-index: 1;
}

.seller-hero__showcase::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 18px;
    z-index: 0;
    width: min(1480px, calc(100vw - 36px));
    height: 560px;
    transform: translateX(-50%);
    pointer-events: none;
    background:
        radial-gradient(circle at 17% 48%, rgba(238, 245, 240, 0.92), rgba(238, 245, 240, 0) 24%),
        radial-gradient(circle at 50% 54%, rgba(238, 245, 240, 0.78), rgba(238, 245, 240, 0) 22%),
        radial-gradient(circle at 84% 46%, rgba(255, 226, 142, 0.18), rgba(255, 226, 142, 0) 23%);
    filter: blur(18px);
}

:root {
    --thecast-interaction: #aac0ad;
}

.btn,
button,
input[type="submit"],
input[type="button"],
.seller-button,
.seller-header-cta,
.thecast-seller-instagram-button,
.thecast-seller-instagram-button-secondary,
.thecast-seller-editorial-button {
    transition:
        color 0.22s ease,
        background-color 0.22s ease,
        border-color 0.22s ease,
        box-shadow 0.22s ease,
        transform 0.22s ease;
}

.btn:hover,
.btn:focus-visible,
.btn:active,
button:hover,
button:focus-visible,
button:active,
input[type="submit"]:hover,
input[type="submit"]:focus-visible,
input[type="submit"]:active,
input[type="button"]:hover,
input[type="button"]:focus-visible,
input[type="button"]:active,
.seller-button:hover,
.seller-button:focus-visible,
.seller-button:active,
.seller-header-cta:hover,
.seller-header-cta:focus-visible,
.seller-header-cta:active,
.thecast-seller-instagram-button:hover,
.thecast-seller-instagram-button:focus-visible,
.thecast-seller-instagram-button:active,
.thecast-seller-instagram-button-secondary:hover,
.thecast-seller-instagram-button-secondary:focus-visible,
.thecast-seller-instagram-button-secondary:active,
.thecast-seller-editorial-button:hover,
.thecast-seller-editorial-button:focus-visible,
.thecast-seller-editorial-button:active {
    background: var(--thecast-interaction);
    border-color: var(--thecast-interaction);
    color: #111111;
    outline: none;
}

.seller-header__menu-button:hover,
.seller-header__menu-button:focus-visible,
.seller-header__menu-button:active,
.seller-header__menu-button[aria-expanded="true"] {
    background: transparent !important;
    border-color: transparent !important;
    box-shadow: none !important;
    color: #181d21;
}

.thecast-mobile-nav-close:hover,
.thecast-mobile-nav-close:focus-visible,
.thecast-mobile-nav-close:active {
    background: #f5f5f5 !important;
    border-color: transparent !important;
    box-shadow: none !important;
    color: #111111;
}

.thecast-seller-showcase {
    position: relative;
    left: auto;
    bottom: auto;
    z-index: 1;
    width: min(1220px, calc(100vw - 68px));
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: clamp(22px, 2.8vw, 40px);
    padding: 16px 0 0;
    margin: 0 auto;
    transform: none;
    pointer-events: auto;
    overscroll-behavior-x: contain;
    -webkit-overflow-scrolling: touch;
}

.thecast-seller-showcase::before {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 8px;
    z-index: -1;
    width: min(96%, 1260px);
    height: 180px;
    border-radius: 999px;
    background:
        radial-gradient(circle at center, rgba(198, 221, 208, 0.16), rgba(198, 221, 208, 0) 74%),
        radial-gradient(circle at 62% 50%, rgba(255, 221, 128, 0.05), rgba(255, 221, 128, 0) 48%);
    filter: blur(30px);
    transform: translateX(-50%);
}

.thecast-seller-showcase-card {
    position: relative;
    flex: 0 0 clamp(154px, 13.1vw, 214px);
    aspect-ratio: 1290 / 2796;
    overflow: hidden;
    border-radius: 30px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(239, 248, 240, 0.98));
    border: 1px solid rgba(255, 255, 255, 0.72);
    box-shadow:
        0 28px 55px rgba(21, 28, 33, 0.14),
        0 10px 22px rgba(168, 190, 176, 0.18);
    pointer-events: none;
    transform: translateZ(0);
    backface-visibility: hidden;
    -webkit-font-smoothing: antialiased;
    scroll-snap-align: start;
}

.thecast-seller-showcase-card::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0));
    pointer-events: none;
}

.thecast-seller-showcase-card img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: relative;
    z-index: 1;
    transform: translateZ(0);
    backface-visibility: hidden;
    image-rendering: -webkit-optimize-contrast;
}

.thecast-seller-showcase-card:nth-child(1) {
    margin-bottom: 18px;
}

.thecast-seller-showcase-card:nth-child(2) {
    margin-bottom: 2px;
}

.thecast-seller-showcase-card:nth-child(3) {
    margin-bottom: 34px;
}

.thecast-seller-showcase-card:nth-child(4) {
    margin-bottom: 10px;
}

.thecast-seller-showcase-card:nth-child(5) {
    margin-bottom: -4px;
}

@keyframes thecast-hero-copy-reveal {
    from {
        opacity: 0;
        transform: translateY(26px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.thecast-hero-message {
    display: grid;
    justify-items: center;
    gap: 10px;
    width: min(100%, 920px);
    margin: 0 auto 14px;
}

.thecast-hero-message-line,
.thecast-hero-subcopy {
    opacity: 0;
    transform: translateY(26px);
    animation: thecast-hero-copy-reveal 0.95s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.thecast-hero-message-line-primary {
    margin: 0;
    color: #aac0ad;
    max-width: 880px;
    font-size: clamp(54px, 6.8vw, 74px);
    font-weight: 800;
    line-height: 1.06;
    letter-spacing: -0.06em;
    animation-delay: 0.9s;
    text-align: center;
}

.thecast-hero-message-line-secondary {
    margin: 0;
    width: fit-content;
    max-width: 100%;
    margin-top: -6px;
    color: #e5e5e5;
    font-size: clamp(38px, 4.7vw, 54px);
    font-weight: 800;
    line-height: 1;
    letter-spacing: -0.05em;
    animation-delay: 1.55s;
    text-align: center;
    transform: translateX(clamp(18px, 3vw, 42px)) translateY(26px);
}

.thecast-hero-subcopy {
    display: block;
    width: min(100%, 760px);
    margin: 0 auto;
    max-width: 760px;
    padding-top: 8px;
    color: #181d21;
    font-size: clamp(18px, 1.55vw, 22px);
    font-weight: 500;
    line-height: 1.5;
    letter-spacing: -0.025em;
    text-align: center;
    justify-self: center;
    animation-delay: 2.15s;
}

.thecast-scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition:
        opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1),
        transform 0.9s cubic-bezier(0.16, 1, 0.3, 1);
    transition-delay: var(--thecast-reveal-delay, 0s);
    will-change: opacity, transform;
}

.thecast-scroll-reveal-card {
    transform: translateY(36px) scale(0.985);
    transform-origin: center top;
}

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

.thecast-scroll-reveal-card.is-visible {
    transform: translateY(0) scale(1);
}

.thecast-seller-followup {
    width: 100%;
    background:
        radial-gradient(circle at 12% 14%, rgba(240, 245, 241, 0.9), rgba(240, 245, 241, 0) 28%),
        linear-gradient(180deg, #ffffff 0%, #fbfbf8 100%);
}

.thecast-seller-followup-section {
    padding: 112px 0;
}

.thecast-seller-followup-section + .thecast-seller-followup-section {
    border-top: 1px solid rgba(24, 29, 33, 0.08);
}

.thecast-seller-followup-inner {
    width: min(1180px, calc(100vw - 48px));
    margin: 0 auto;
}

.thecast-seller-followup-heading {
    max-width: 760px;
    margin: 0 auto;
    text-align: center;
}

.thecast-seller-followup-heading h2 {
    margin: 0;
    color: #181d21;
    font-size: clamp(32px, 4.2vw, 56px);
    font-weight: 800;
    line-height: 1.16;
    letter-spacing: -0.05em;
}

.thecast-seller-followup-heading p {
    margin: 24px auto 0;
    color: rgba(24, 29, 33, 0.6);
    font-size: clamp(16px, 1.55vw, 22px);
    line-height: 1.8;
    letter-spacing: -0.025em;
}

.thecast-seller-followup-label {
    margin: 50px 0 0;
    color: rgba(24, 29, 33, 0.42);
    font-size: 15px;
    font-weight: 500;
    line-height: 1.2;
    letter-spacing: 0.04em;
    text-align: center;
}

.thecast-seller-partner-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 32px;
    margin-top: 36px;
}

.thecast-seller-partner-card {
    min-height: 0;
    padding: 0 22px;
    text-align: center;
}

.thecast-seller-partner-card + .thecast-seller-partner-card {
    border-left: 1px solid rgba(24, 29, 33, 0.1);
}

.thecast-seller-partner-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    margin: 0 auto 22px;
}

.thecast-seller-partner-icon img {
    display: block;
    width: 48px;
    height: 48px;
}

.thecast-seller-partner-card small {
    display: block;
    margin-bottom: 16px;
    color: rgba(24, 29, 33, 0.38);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.14em;
}

.thecast-seller-partner-mark {
    display: block;
    color: #181d21;
    font-size: clamp(26px, 2.5vw, 40px);
    font-weight: 800;
    line-height: 1.08;
    letter-spacing: -0.04em;
}

.thecast-seller-partner-card p {
    margin: 18px 0 0;
    color: rgba(24, 29, 33, 0.62);
    font-size: 15px;
    line-height: 1.7;
    letter-spacing: -0.02em;
}

.thecast-seller-partner-accent {
    color: #2f8f68;
}

.thecast-seller-knowhow-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.02fr) minmax(300px, 0.74fr);
    gap: 76px;
    align-items: center;
    margin-top: 54px;
}

.thecast-seller-knowhow-points {
    display: grid;
    gap: 46px;
}

.thecast-seller-knowhow-point {
    display: grid;
    grid-template-columns: 56px minmax(0, 1fr);
    gap: 20px;
    align-items: start;
    padding: 14px 0;
}

.thecast-seller-knowhow-icon {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    width: 56px;
    height: 56px;
}

.thecast-seller-knowhow-icon svg {
    width: 40px;
    height: 40px;
    stroke: #ff4c1f;
}

.thecast-seller-knowhow-point:nth-child(1) .thecast-seller-knowhow-icon svg {
    stroke: #2f8f68;
}

.thecast-seller-knowhow-point:nth-child(2) .thecast-seller-knowhow-icon svg {
    stroke: #ff5a36;
}

.thecast-seller-knowhow-point:nth-child(3) .thecast-seller-knowhow-icon svg {
    stroke: #c67a18;
}

.thecast-seller-knowhow-point strong {
    display: block;
    color: #181d21;
    font-size: clamp(22px, 1.85vw, 30px);
    font-weight: 800;
    line-height: 1.16;
    letter-spacing: -0.045em;
}

.thecast-seller-knowhow-point p {
    margin: 18px 0 0;
    color: rgba(24, 29, 33, 0.62);
    font-size: 16px;
    line-height: 1.78;
    letter-spacing: -0.02em;
}

.thecast-seller-knowhow-visual {
    position: relative;
    min-height: 612px;
    padding: 10px 0 0;
}

.thecast-seller-knowhow-visual::before {
    content: "";
    position: absolute;
    inset: 36px 12px 54px;
    border-radius: 48px;
    background:
        radial-gradient(circle at 50% 24%, rgba(199, 220, 211, 0.52), rgba(199, 220, 211, 0) 54%),
        radial-gradient(circle at 50% 80%, rgba(255, 216, 140, 0.22), rgba(255, 216, 140, 0) 42%);
    filter: blur(10px);
}

.thecast-seller-knowhow-device {
    position: relative;
    width: min(100%, 418px);
    margin: 0 auto;
    border-radius: 44px;
    overflow: hidden;
    box-shadow:
        0 36px 72px rgba(24, 29, 33, 0.16),
        0 16px 32px rgba(158, 176, 165, 0.18);
}

.thecast-seller-knowhow-device img {
    width: 100%;
    height: auto;
}

.thecast-seller-history {
    position: relative;
    overflow: hidden;
    width: 100%;
    padding: 122px 0 132px;
    background:
        radial-gradient(circle at 14% 82%, rgba(90, 68, 44, 0.2), rgba(90, 68, 44, 0) 22%),
        radial-gradient(circle at 76% 18%, rgba(94, 74, 48, 0.16), rgba(94, 74, 48, 0) 18%),
        linear-gradient(180deg, #141418 0%, #191516 100%);
}

.thecast-seller-history::before,
.thecast-seller-history::after {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.thecast-seller-history::before {
    background:
        radial-gradient(circle at 8% 78%, rgba(211, 168, 112, 0.08) 0, rgba(211, 168, 112, 0.08) 48px, transparent 49px),
        radial-gradient(circle at 18% 52%, rgba(211, 168, 112, 0.07) 0, rgba(211, 168, 112, 0.07) 42px, transparent 43px),
        radial-gradient(circle at 25% 86%, rgba(211, 168, 112, 0.06) 0, rgba(211, 168, 112, 0.06) 54px, transparent 55px),
        radial-gradient(circle at 35% 32%, rgba(211, 168, 112, 0.05) 0, rgba(211, 168, 112, 0.05) 58px, transparent 59px),
        radial-gradient(circle at 47% 72%, rgba(211, 168, 112, 0.06) 0, rgba(211, 168, 112, 0.06) 46px, transparent 47px),
        radial-gradient(circle at 60% 24%, rgba(211, 168, 112, 0.05) 0, rgba(211, 168, 112, 0.05) 66px, transparent 67px),
        radial-gradient(circle at 72% 68%, rgba(211, 168, 112, 0.06) 0, rgba(211, 168, 112, 0.06) 50px, transparent 51px),
        radial-gradient(circle at 84% 20%, rgba(211, 168, 112, 0.05) 0, rgba(211, 168, 112, 0.05) 72px, transparent 73px),
        radial-gradient(circle at 92% 58%, rgba(211, 168, 112, 0.05) 0, rgba(211, 168, 112, 0.05) 60px, transparent 61px);
    filter: blur(16px);
    opacity: 0.95;
}

.thecast-seller-history::after {
    background:
        radial-gradient(circle at 26% 20%, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0) 24%),
        radial-gradient(circle at 74% 78%, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0) 20%);
}

.thecast-seller-history-inner {
    position: relative;
    z-index: 1;
    width: min(1280px, calc(100vw - 48px));
    margin: 0 auto;
}

.thecast-seller-history-grid {
    display: grid;
    grid-template-columns: minmax(260px, 0.9fr) minmax(0, 1.1fr);
    gap: 96px;
    align-items: start;
}

.thecast-seller-history-heading h2 {
    margin: 0;
    color: #ffffff;
    font-size: clamp(34px, 4.3vw, 58px);
    font-weight: 800;
    line-height: 1.18;
    letter-spacing: -0.05em;
}

.thecast-seller-history-metrics {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 52px 86px;
    padding-top: 4px;
}

.thecast-seller-history-metric small {
    display: block;
    color: #ffffff;
    font-size: 16px;
    font-weight: 700;
    line-height: 1.55;
    letter-spacing: -0.02em;
}

.thecast-seller-history-value {
    display: block;
    margin-top: 16px;
    color: #ffffff;
}

.thecast-seller-history-value strong {
    display: inline-block;
    max-width: none;
    white-space: nowrap;
    font-size: clamp(34px, 2.85vw, 48px);
    font-weight: 800;
    line-height: 1;
    letter-spacing: -0.05em;
    word-break: keep-all;
}

body[data-seller-locale="en"] .thecast-seller-history-value strong {
    display: block;
    max-width: 320px;
    white-space: normal;
    font-size: clamp(24px, 2vw, 34px);
    line-height: 1.08;
    letter-spacing: -0.045em;
}

.thecast-seller-editorial {
    width: 100%;
    padding: 56px 0 120px;
    background:
        radial-gradient(circle at 18% 12%, rgba(218, 232, 224, 0.22), rgba(218, 232, 224, 0) 32%),
        linear-gradient(180deg, #ffffff 0%, #fcfcfa 100%);
}

.thecast-seller-editorial-inner {
    width: min(1280px, calc(100vw - 48px));
    margin: 0 auto;
}

.thecast-seller-editorial-heading {
    margin: 0 0 54px;
    text-align: center;
}

.thecast-seller-editorial-heading h2 {
    margin: 16px 0 0;
    color: #181d21;
    font-size: clamp(40px, 5vw, 66px);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.05em;
}

.thecast-seller-instagram-layout {
    display: block;
}

.thecast-seller-instagram-button,
.thecast-seller-instagram-button-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 50px;
    padding: 0 18px;
    border-radius: 999px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: -0.02em;
    transition:
        transform 0.24s ease,
        box-shadow 0.24s ease,
        background-color 0.24s ease;
}

.thecast-seller-instagram-button {
    background: #181d21;
    box-shadow: 0 16px 32px rgba(24, 29, 33, 0.12);
    color: #ffffff;
}

.thecast-seller-instagram-button-secondary {
    border: 1px solid rgba(24, 29, 33, 0.12);
    background: rgba(255, 255, 255, 0.82);
    color: #181d21;
}

.thecast-seller-instagram-button:hover,
.thecast-seller-instagram-button:focus-visible,
.thecast-seller-instagram-button-secondary:hover,
.thecast-seller-instagram-button-secondary:focus-visible {
    transform: translateY(-2px);
    outline: none;
}

.thecast-seller-instagram-feed {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 36px 30px;
}

.thecast-seller-instagram-card {
    position: relative;
    display: block;
    min-height: 0;
    background: transparent;
    text-decoration: none;
}

.thecast-seller-instagram-link {
    display: block;
    color: inherit;
    text-decoration: none;
}

.thecast-seller-instagram-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.thecast-seller-instagram-card:hover img,
.thecast-seller-instagram-card:focus-visible img {
    transform: scale(1.03);
}

.thecast-seller-instagram-media {
    position: relative;
    aspect-ratio: 1.18 / 1;
    overflow: hidden;
    border-radius: 4px;
    background: #edf1ec;
}

.thecast-seller-instagram-copy {
    padding: 14px 2px 0;
}

.thecast-seller-instagram-topline {
    margin: 0;
    color: rgba(24, 29, 33, 0.42);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.14em;
    line-height: 1.5;
}

.thecast-seller-instagram-title {
    margin: 8px 0 0;
    color: #181d21;
    font-size: 24px;
    font-weight: 700;
    line-height: 1.24;
    letter-spacing: -0.04em;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    min-height: 60px;
}

.thecast-seller-instagram-caption {
    margin: 10px 0 0;
    color: rgba(24, 29, 33, 0.72);
    font-size: 15px;
    font-weight: 500;
    line-height: 1.6;
    letter-spacing: -0.02em;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    min-height: 48px;
}

.thecast-seller-editorial-cta {
    display: flex;
    justify-content: center;
    margin-top: 42px;
}

.thecast-seller-editorial-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 54px;
    padding: 0 26px;
    border-radius: 999px;
    border: 1px solid rgba(24, 29, 33, 0.14);
    background: #ffffff;
    box-shadow: 0 16px 32px rgba(24, 29, 33, 0.06);
    color: #181d21;
    font-size: 15px;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.thecast-seller-editorial-button:hover,
.thecast-seller-editorial-button:focus-visible {
    transform: translateY(-2px);
    outline: none;
}

.seller-inquiry {
    background: #eeeeee;
}

.thecast-seller-inquiry-intro {
    width: 100%;
    padding: 54px 0 10px;
}

.thecast-seller-inquiry-intro-inner {
    width: min(100vw - 64px, 1280px);
    margin: 0 auto;
}

.thecast-seller-inquiry-intro-title {
    margin: 0;
    text-align: center;
    color: #111111;
    font-size: clamp(34px, 5vw, 64px);
    font-weight: 800;
    line-height: 1.08;
    letter-spacing: -0.04em;
}

.seller-inquiry__inner {
    padding: 20px 0 88px;
}

.seller-inquiry-form {
    padding: 34px;
    border-radius: 28px;
    background: rgba(255, 255, 255, 0.86);
    box-shadow: 0 18px 42px rgba(24, 29, 33, 0.08);
}

.seller-inquiry-form__grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 18px;
}

.seller-inquiry-form__textarea,
.seller-inquiry-form__consent {
    grid-column: 1 / -1;
}

.seller-inquiry-form {
    width: 100%;
}

.seller-form-group,
.seller-phone-fields {
    width: 100%;
}

.seller-form-control {
    width: 100%;
    min-height: 52px;
    padding: 14px 16px;
    border: 1px solid rgba(24, 29, 33, 0.14);
    border-radius: 16px;
    background: #ffffff;
    color: #181d21;
    appearance: none;
}

textarea.seller-form-control {
    min-height: 148px;
    resize: vertical;
}

.seller-form-label,
.seller-checkbox span {
    color: #111111;
    font-size: 14px;
}

.seller-form-label {
    display: block;
    margin: 0 0 8px;
    font-weight: 600;
}

.icon-required {
    margin-left: 4px;
    color: #ff5a36;
    font-style: normal;
}

.seller-phone-fields {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1fr);
    gap: 10px;
    align-items: center;
}

.seller-phone-fields .line {
    color: rgba(24, 29, 33, 0.38);
    font-weight: 700;
}

.seller-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.seller-checkbox__input {
    margin-top: 3px;
}

.seller-checkbox a {
    text-decoration: underline;
}

.seller-inquiry-form__actions {
    display: flex;
    justify-content: flex-end;
    margin-top: 28px;
}

.seller-inquiry-submit {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 180px;
    min-height: 54px;
    padding: 0 24px;
    border: 0;
    border-radius: 999px;
    background: #181d21;
    color: #ffffff;
    box-shadow: 0 14px 32px rgba(24, 29, 33, 0.12);
    cursor: pointer;
}

.seller-inquiry-submit:hover,
.seller-inquiry-submit:focus-visible {
    background: #aac0ad;
    color: #111111;
    outline: none;
}

.seller-footer {
    background: #ffffff;
}

.thecast-seller-contact {
    max-width: 1440px;
    width: min(1440px, calc(100vw - 48px));
    margin: 0 auto;
    padding: 56px 0 44px;
    color: #181d21;
}

.thecast-seller-contact-topline {
    width: 100%;
    margin: 0 auto;
    padding: 0 0 14px;
    border-bottom: 1px solid rgba(24, 29, 33, 0.12);
}

.thecast-seller-contact-email-wrap {
    width: 100%;
    margin: 0 auto;
    padding: 4px 0 22px;
}

.thecast-seller-contact-email-label {
    margin: 0 0 10px;
    color: rgba(24, 29, 33, 0.46);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.22em;
}

.thecast-seller-contact-email-link {
    display: inline-flex;
    align-items: center;
    color: #181d21;
    text-decoration: none;
}

.thecast-seller-contact-email {
    font-size: clamp(18px, 2.4vw, 28px);
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: 0.08em;
}

.thecast-seller-contact-utility-links {
    display: flex;
    align-items: center;
    gap: 14px 28px;
    flex-wrap: wrap;
}

.thecast-seller-contact-utility-links a {
    color: rgba(24, 29, 33, 0.72);
    font-size: 14px;
    line-height: 1.5;
    text-decoration: none;
}

.thecast-seller-contact-utility-links a:hover,
.thecast-seller-contact-utility-links a:focus-visible {
    color: #181d21;
    text-decoration: underline;
    outline: none;
}

.thecast-seller-contact-layout {
    width: 100%;
    margin: 0 auto;
    padding-top: 18px;
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(220px, 0.6fr) minmax(280px, 0.85fr);
    gap: 24px;
}

.thecast-seller-contact-company,
.thecast-seller-contact-service,
.thecast-seller-contact-lab {
    display: grid;
    align-content: start;
    gap: 10px;
}

.thecast-seller-contact-company-name,
.thecast-seller-contact-service-title,
.thecast-seller-contact-lab-title {
    margin: 0;
    color: #181d21;
    font-size: 16px;
    font-weight: 700;
}

.thecast-seller-contact-service-phone {
    display: inline-block;
    margin: 0;
    color: #181d21;
    font-family:
        "Noto Sans KR",
        "Apple SD Gothic Neo",
        "Segoe UI",
        sans-serif;
    font-size: 18px;
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: 0.01em;
    white-space: nowrap;
    font-variant-numeric: normal;
    font-feature-settings: "tnum" 0, "lnum" 1;
}

.thecast-seller-contact-company-meta,
.thecast-seller-contact-service-meta,
.thecast-seller-contact-lab-meta {
    display: grid;
    gap: 8px;
}

.thecast-seller-contact-company-meta p,
.thecast-seller-contact-service-meta p,
.thecast-seller-contact-lab-meta p {
    margin: 0;
    color: rgba(24, 29, 33, 0.46);
    font-size: 13px;
    line-height: 1.68;
    letter-spacing: -0.01em;
}

.thecast-seller-contact-service,
.thecast-seller-contact-lab {
    padding-left: 24px;
    border-left: 1px solid rgba(24, 29, 33, 0.08);
}

.thecast-seller-contact-cert-line {
    display: block;
}

.thecast-seller-contact-footer {
    width: 100%;
    margin: 0;
    padding-top: 0;
    text-align: left;
    font-size: 12px;
    color: rgba(24, 29, 33, 0.5);
    line-height: 1.68;
    letter-spacing: 0.01em;
}

.thecast-mobile-top-button {
    position: fixed;
    right: 20px;
    bottom: 20px;
    z-index: 9999;
    width: 52px;
    height: 52px;
    border: 1px solid rgba(17, 17, 17, 0.12);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.94);
    color: #111111;
    box-shadow: 0 16px 30px rgba(17, 17, 17, 0.14);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition: opacity 0.22s ease, transform 0.22s ease, visibility 0.22s ease;
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
}

.thecast-mobile-top-button.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.thecast-mobile-top-button svg {
    width: 20px;
    height: 20px;
}

.thecast-mobile-nav-overlay {
    position: fixed;
    inset: 0;
    z-index: 10001;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.22s ease, visibility 0.22s ease;
}

.thecast-mobile-nav-overlay.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.thecast-mobile-nav-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(17, 17, 17, 0.32);
}

.thecast-mobile-nav-panel {
    position: absolute;
    top: 0;
    right: 0;
    width: min(84vw, 320px);
    height: 100%;
    padding: 24px 20px 32px;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: -16px 0 40px rgba(17, 17, 17, 0.16);
    transform: translateX(100%);
    transition: transform 0.24s ease;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.thecast-mobile-nav-overlay.is-open .thecast-mobile-nav-panel {
    transform: translateX(0);
}

.thecast-mobile-nav-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.thecast-mobile-nav-title {
    margin: 0;
    color: #111111;
    font-size: 15px;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.thecast-mobile-nav-close {
    width: 40px;
    height: 40px;
    border: 0;
    border-radius: 999px;
    background: #f5f5f5;
    color: #111111;
    font-size: 24px;
    line-height: 1;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    -webkit-tap-highlight-color: transparent;
}

.thecast-mobile-nav-close:hover,
.thecast-mobile-nav-close:focus-visible,
.thecast-mobile-nav-close:active {
    background: #f5f5f5 !important;
    border-color: transparent !important;
    box-shadow: none !important;
    color: #111111;
    outline: none;
}

.thecast-mobile-nav-links {
    display: grid;
    gap: 10px;
}

.thecast-mobile-nav-links a {
    display: block;
    padding: 14px 4px;
    border-bottom: 1px solid rgba(17, 17, 17, 0.08);
    color: #111111;
    font-size: 17px;
    font-weight: 600;
    line-height: 1.35;
    text-decoration: none;
}

body.thecast-mobile-menu-open {
    overflow: hidden;
}

.seller-header__mobile {
    display: none;
}

@media (max-width: 768px) {
    .seller-shell,
    .thecast-seller-followup-inner,
    .thecast-seller-history-inner,
    .thecast-seller-editorial-inner,
    .thecast-seller-inquiry-intro-inner,
    .thecast-seller-contact {
        width: min(100vw - 32px, 1280px);
    }

    .seller-header__desktop {
        display: none;
    }

    .seller-header__mobile {
        display: flex;
        min-height: 84px;
    }

    .seller-header__logo {
        width: 124px;
    }

    .seller-hero__inner {
        padding: 52px 0 48px;
    }

    .thecast-hero-message {
        width: min(100%, calc(100vw - 32px));
        gap: 10px;
    }

    .thecast-hero-message-line-primary {
        font-size: clamp(28px, 8.6vw, 44px);
        line-height: 1.15;
    }

    .thecast-hero-message-line-secondary {
        margin-top: 8px;
        font-size: clamp(24px, 7.2vw, 34px);
        transform: none;
        line-height: 1.04;
    }

    .thecast-hero-subcopy {
        max-width: calc(100vw - 36px);
        padding-top: 12px;
        font-size: clamp(15px, 3.8vw, 18px);
        line-height: 1.62;
    }

    .seller-hero__showcase::before {
        display: none;
    }

    .seller-hero__showcase {
        overflow: hidden;
        margin-top: 20px;
    }

    .thecast-seller-showcase {
        position: relative;
        left: auto;
        bottom: auto;
        width: 100%;
        gap: 12px;
        padding: 14px 0 12px;
        margin: 0;
        justify-content: flex-start;
        overflow-x: auto;
        overflow-y: hidden;
        scrollbar-width: none;
        transform: none;
        scroll-snap-type: x mandatory;
        scroll-padding-inline: 0;
        box-sizing: border-box;
        touch-action: pan-y pinch-zoom;
        overscroll-behavior-x: contain;
        overscroll-behavior-y: none;
        -webkit-overflow-scrolling: touch;
    }

    .thecast-seller-showcase.is-touch-dragging {
        scroll-snap-type: none;
    }

    .thecast-seller-showcase::before {
        width: 92%;
        height: 76px;
        bottom: -2px;
        filter: blur(14px);
    }

    .thecast-seller-showcase::-webkit-scrollbar {
        display: none;
    }

    .thecast-seller-showcase-card {
        flex-basis: 128px;
        border-radius: 22px;
        scroll-snap-stop: always;
    }

    .thecast-seller-showcase-card:nth-child(1) {
        margin-bottom: 8px;
    }

    .thecast-seller-showcase-card:nth-child(2) {
        margin-bottom: -2px;
    }

    .thecast-seller-showcase-card:nth-child(3) {
        margin-bottom: 18px;
    }

    .thecast-seller-showcase-card:nth-child(4) {
        margin-bottom: 4px;
    }

    .thecast-seller-showcase-card:nth-child(5) {
        margin-bottom: -4px;
    }

    .thecast-seller-followup-section {
        padding: 82px 0;
    }

    .thecast-seller-partner-grid,
    .thecast-seller-knowhow-layout,
    .thecast-seller-history-grid,
    .thecast-seller-history-metrics,
    .thecast-seller-instagram-feed,
    .seller-inquiry-form__grid,
    .thecast-seller-contact-layout {
        grid-template-columns: 1fr;
    }

    .thecast-seller-partner-grid {
        gap: 0;
        margin-top: 28px;
    }

    .thecast-seller-partner-card {
        padding: 28px 0;
    }

    .thecast-seller-partner-card + .thecast-seller-partner-card {
        border-left: 0;
        border-top: 1px solid rgba(24, 29, 33, 0.08);
    }

    .thecast-seller-knowhow-layout {
        gap: 40px;
    }

    .thecast-seller-knowhow-visual {
        min-height: auto;
        padding: 2px 0 0;
    }

    .thecast-seller-knowhow-points {
        gap: 32px;
    }

    .thecast-seller-knowhow-point {
        grid-template-columns: 52px minmax(0, 1fr);
        gap: 14px;
        padding: 8px 0;
    }

    .thecast-seller-knowhow-icon {
        width: 52px;
        height: 52px;
    }

    .thecast-seller-knowhow-icon svg {
        width: 36px;
        height: 36px;
    }

    .thecast-seller-history {
        padding: 88px 0 96px;
    }

    .thecast-seller-history-grid {
        gap: 48px;
    }

    .thecast-seller-history-metrics {
        gap: 36px;
    }

    .thecast-seller-history-value strong {
        white-space: normal;
        font-size: clamp(26px, 7vw, 36px);
        line-height: 1.08;
    }

    .thecast-seller-editorial {
        padding: 18px 0 82px;
    }

    .thecast-seller-instagram-feed {
        gap: 16px;
    }

    .thecast-seller-instagram-title,
    .thecast-seller-instagram-caption {
        min-height: 0;
    }

    .thecast-seller-instagram-media {
        aspect-ratio: 1.1 / 1;
    }

    .thecast-seller-inquiry-intro {
        padding: 38px 0 8px;
    }

    .seller-inquiry-form {
        padding: 24px 20px;
    }

    .seller-phone-fields {
        grid-template-columns: 1fr;
    }

    .seller-phone-fields .line {
        display: none;
    }

    .seller-inquiry-form__actions {
        justify-content: stretch;
    }

    .seller-inquiry-submit {
        width: 100%;
    }

    .thecast-seller-contact {
        padding: 40px 0 32px;
    }

    .thecast-seller-contact-service,
    .thecast-seller-contact-lab {
        padding-top: 20px;
        padding-left: 0;
        border-top: 1px solid rgba(24, 29, 33, 0.08);
        border-left: 0;
    }
}

@media (min-width: 769px) {
    .thecast-mobile-top-button,
    .thecast-mobile-nav-overlay {
        display: none !important;
    }
}