:root {
    --about-primary: #0f766e;
    --about-primary-dark: #115e59;
    --about-primary-deep: #134e4a;
    --about-primary-soft: #ccfbf1;
    --about-coral: #e97862;
    --about-text: #18232b;
    --about-muted: #5f6f79;
    --about-border: #d8e5e2;
    --about-surface: #ffffff;
    --about-tint: #f2f8f7;
}

html {
    scroll-behavior: smooth;
}

body.about-page {
    margin: 0;
    background: var(--about-surface);
    color: var(--about-text);
    font-family: "Manrope", "Inter", "Noto Sans KR", Arial, sans-serif;
    line-height: 1.7;
    word-break: keep-all;
}

.about-container {
    width: min(1120px, calc(100% - 48px));
    margin: 0 auto;
}

.about-site-header {
    position: relative;
    z-index: 10;
    border-bottom: 1px solid rgba(15, 118, 110, 0.1);
    background: rgba(255, 255, 255, 0.97);
}

.about-header-inner {
    display: flex;
    min-height: 76px;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.about-header-brand .brand-logo {
    display: inline-flex;
    align-items: center;
    gap: 11px;
    color: var(--about-text);
    text-decoration: none;
}

.about-header-brand .brand-logo img {
    width: 46px;
    height: 46px;
    object-fit: contain;
}

.about-header-brand .brand-product-name {
    display: grid;
    line-height: 1.15;
}

.about-header-brand .brand-product-name strong {
    font-size: 0.94rem;
}

.about-header-brand .brand-product-name small {
    margin-top: 3px;
    color: var(--about-primary);
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.about-nav {
    display: flex;
    align-items: center;
    gap: 22px;
}

.about-nav a {
    color: #43535c;
    font-size: 0.92rem;
    font-weight: 750;
    text-decoration: none;
}

.about-nav a[aria-current="page"] {
    color: var(--about-primary-dark);
}

.about-nav .about-nav-cta {
    min-height: 38px;
    padding: 8px 16px;
    border-radius: 9px;
    background: var(--about-primary);
    color: #fff;
}

.about-main {
    display: block;
    margin: 0;
    padding: 0;
}

.about-hero {
    overflow: hidden;
    background:
        radial-gradient(circle at 82% 28%, rgba(204, 251, 241, 0.9), transparent 30%),
        linear-gradient(145deg, #f6fbfa 0%, #ffffff 66%);
}

.about-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 310px;
    min-height: 580px;
    align-items: center;
    gap: 76px;
    padding-top: 80px;
    padding-bottom: 80px;
}

.about-eyebrow,
.about-section-label {
    margin: 0 0 14px;
    color: var(--about-primary);
    font-size: 0.78rem;
    font-weight: 850;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.about-hero h1 {
    max-width: 800px;
    margin: 0;
    font-size: clamp(2.45rem, 5vw, 4.7rem);
    font-weight: 900;
    letter-spacing: -0.055em;
    line-height: 1.12;
}

.about-hero-intro {
    max-width: 740px;
    margin: 30px 0 0;
    color: var(--about-muted);
    font-size: clamp(1.02rem, 1.7vw, 1.22rem);
    line-height: 1.85;
}

.about-hero-mark {
    display: flex;
    aspect-ratio: 1;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(15, 118, 110, 0.12);
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.76);
    box-shadow: 0 28px 70px rgba(15, 118, 110, 0.14);
}

.about-hero-mark img {
    width: 72%;
}

.about-section {
    padding: 104px 0;
}

.about-section-tint {
    background: var(--about-tint);
}

.about-reading {
    max-width: 900px;
}

.about-section h2,
.about-vision h2 {
    max-width: 900px;
    margin: 0;
    font-size: clamp(2rem, 3.8vw, 3.25rem);
    font-weight: 880;
    letter-spacing: -0.045em;
    line-height: 1.2;
}

.about-prose,
.about-focus-panel {
    margin-top: 40px;
    color: #40515b;
    font-size: 1.06rem;
}

.about-prose p,
.about-focus-panel p {
    margin: 0 0 20px;
}

.about-quote {
    margin: 44px 0 28px;
    padding: 28px 32px;
    border-left: 5px solid var(--about-coral);
    border-radius: 0 14px 14px 0;
    background: #fff7f4;
    color: #713f34;
    font-size: clamp(1.2rem, 2.4vw, 1.65rem);
    font-weight: 800;
    letter-spacing: -0.025em;
}

.about-closing {
    margin: 0;
    color: var(--about-primary-deep);
    font-size: 1.15rem;
    font-weight: 800;
}

.about-card-grid {
    display: grid;
    gap: 22px;
    margin-top: 48px;
}

.about-card-grid-three {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.about-card {
    padding: 30px;
    border: 1px solid var(--about-border);
    border-radius: 18px;
    background: #fff;
    box-shadow: 0 12px 32px rgba(25, 51, 48, 0.055);
}

.about-card h3 {
    margin: 0 0 13px;
    color: var(--about-text);
    font-size: 1.15rem;
    letter-spacing: -0.025em;
    line-height: 1.35;
}

.about-card p {
    margin: 0;
    color: var(--about-muted);
    font-size: 0.96rem;
}

.about-card-kicker,
.about-card .about-feature-name {
    margin-bottom: 12px;
    color: var(--about-primary);
    font-size: 0.78rem;
    font-weight: 850;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.about-emphasis {
    max-width: 920px;
    margin: 48px auto 0;
    color: var(--about-primary-deep);
    font-size: clamp(1.12rem, 2vw, 1.35rem);
    font-weight: 780;
    line-height: 1.75;
    text-align: center;
}

.about-focus-panel {
    margin-top: 0;
    padding: 56px;
    border: 1px solid rgba(15, 118, 110, 0.15);
    border-radius: 24px;
    background: linear-gradient(135deg, #f2fbf9, #fff);
}

.about-focus-panel h2 {
    margin-bottom: 36px;
}

.about-feature-card {
    border-top: 5px solid var(--about-primary);
}

.about-learning-flow {
    display: flex;
    margin: 52px 0 0;
    padding: 0;
    align-items: center;
    justify-content: center;
    gap: 12px;
    list-style: none;
}

.about-learning-flow li {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--about-primary-deep);
    font-size: 0.94rem;
    font-weight: 850;
    white-space: nowrap;
}

.about-learning-flow li:not(:last-child)::after {
    color: var(--about-coral);
    content: "→";
    font-size: 1.25rem;
}

.about-flow-copy {
    max-width: 760px;
    margin: 44px auto 0;
    color: var(--about-muted);
    font-size: 1.08rem;
    text-align: center;
}

.about-flow-copy p {
    margin: 8px 0;
}

.about-section-intro {
    max-width: 700px;
    margin: 22px 0 0;
    color: var(--about-muted);
}

.about-future-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.about-future-grid .about-card:last-child {
    grid-column: 2;
}

.about-vision {
    padding: 112px 0;
    background: var(--about-primary-deep);
    color: #fff;
}

.about-vision-inner {
    max-width: 900px;
    text-align: center;
}

.about-vision .about-section-label {
    color: #99f6e4;
}

.about-vision h2 {
    margin-right: auto;
    margin-left: auto;
    color: #fff;
}

.about-vision p:not(.about-section-label) {
    max-width: 720px;
    margin: 28px auto 0;
    color: #d7eeea;
    font-size: 1.1rem;
}

.about-primary-cta {
    display: inline-flex;
    min-height: 50px;
    margin-top: 40px;
    padding: 12px 22px;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: #fff;
    color: var(--about-primary-deep);
    font-weight: 850;
    text-decoration: none;
}

.about-site-footer {
    padding: 28px 0;
    background: #0d3f3c;
    color: #b9d9d4;
    font-size: 0.82rem;
}

.about-site-footer .about-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.about-site-footer a {
    color: #fff;
    font-weight: 800;
    text-decoration: none;
}

.about-nav a:focus-visible,
.about-primary-cta:focus-visible,
.about-site-footer a:focus-visible,
.about-header-brand .brand-logo:focus-visible {
    outline: 3px solid var(--about-coral);
    outline-offset: 4px;
}

@media (max-width: 900px) {
    .about-hero-grid {
        grid-template-columns: minmax(0, 1fr) 220px;
        min-height: 520px;
        gap: 38px;
    }

    .about-card-grid-three,
    .about-future-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .about-future-grid .about-card:last-child {
        grid-column: auto;
    }

    .about-learning-flow {
        flex-wrap: wrap;
    }
}

@media (max-width: 640px) {
    .about-container {
        width: min(100% - 30px, 1120px);
    }

    .about-header-inner {
        min-height: 68px;
        gap: 12px;
    }

    .about-header-brand .brand-logo img {
        width: 40px;
        height: 40px;
    }

    .about-header-brand .brand-product-name {
        display: none;
    }

    .about-nav {
        gap: 10px;
    }

    .about-nav a {
        font-size: 0.8rem;
    }

    .about-nav .about-nav-cta {
        padding-right: 11px;
        padding-left: 11px;
    }

    main.about-main {
        margin: 0 !important;
        padding: 0 !important;
    }

    .about-hero-grid {
        grid-template-columns: 1fr;
        min-height: auto;
        gap: 32px;
        padding-top: 68px;
        padding-bottom: 68px;
    }

    .about-hero h1 {
        font-size: clamp(2.2rem, 11vw, 3.2rem);
    }

    .about-hero-mark {
        width: 180px;
        margin: 0 auto;
    }

    .about-section {
        padding: 72px 0;
    }

    .about-card-grid-three,
    .about-future-grid {
        grid-template-columns: 1fr;
        margin-top: 36px;
    }

    .about-card {
        padding: 24px;
    }

    .about-focus-panel {
        padding: 32px 24px;
    }

    .about-quote {
        padding: 22px 20px;
    }

    .about-learning-flow {
        display: grid;
        grid-template-columns: 1fr;
        max-width: 280px;
        margin-right: auto;
        margin-left: auto;
        gap: 8px;
    }

    .about-learning-flow li {
        display: grid;
        justify-items: center;
        gap: 7px;
        padding: 12px 16px;
        border: 1px solid var(--about-border);
        border-radius: 10px;
        background: #fff;
        white-space: normal;
    }

    .about-learning-flow li:not(:last-child)::after {
        content: "↓";
    }

    .about-vision {
        padding: 80px 0;
    }

    .about-site-footer .about-container {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}