:root {
    --transition-navy: #10253f;
    --transition-blue: #006f9f;
    --transition-blue-dark: #005777;
    --transition-sky: #e9f7fb;
    --transition-mint: #5dc6bf;
    --transition-ink: #172033;
    --transition-muted: #617083;
    --transition-line: #dbe5ec;
    --transition-surface: #ffffff;
    --transition-soft: #f5f8fa;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--transition-ink);
    background: var(--transition-surface);
    font-family: Pretendard, "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
    line-height: 1.6;
    word-break: keep-all;
}

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

.skip-link {
    position: fixed;
    top: 8px;
    left: 8px;
    z-index: 100;
    padding: 10px 14px;
    color: #fff;
    background: var(--transition-navy);
    border-radius: 8px;
    transform: translateY(-160%);
}

.skip-link:focus {
    transform: translateY(0);
}

.transition-shell {
    width: min(1180px, calc(100% - 48px));
    margin: 0 auto;
}

.transition-header {
    height: 76px;
    border-bottom: 1px solid rgba(219, 229, 236, .9);
    background: rgba(255, 255, 255, .94);
}

.transition-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.transition-brand {
    display: inline-flex;
    align-items: center;
    gap: 13px;
    font-size: 17px;
    font-weight: 900;
    letter-spacing: .08em;
}

.transition-brand img {
    width: auto;
    height: 34px;
    object-fit: contain;
}

.transition-header__label {
    color: var(--transition-muted);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: .18em;
}

.transition-hero {
    position: relative;
    overflow: hidden;
    background:
        radial-gradient(circle at 85% 10%, rgba(93, 198, 191, .24), transparent 31%),
        linear-gradient(145deg, #f7fbfc 0%, #eaf6f9 51%, #f5fafb 100%);
}

.transition-hero::before {
    content: "";
    position: absolute;
    top: -170px;
    right: -90px;
    width: 460px;
    height: 460px;
    border: 1px solid rgba(0, 111, 159, .12);
    border-radius: 50%;
    box-shadow: 0 0 0 78px rgba(0, 111, 159, .035), 0 0 0 156px rgba(0, 111, 159, .025);
}

.transition-hero__inner {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1.04fr) minmax(460px, .96fr);
    gap: 72px;
    align-items: center;
    min-height: 650px;
    padding-top: 76px;
    padding-bottom: 76px;
}

.transition-dday {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 104px;
    height: 46px;
    margin-bottom: 27px;
    padding: 0 19px;
    color: #fff;
    background: var(--transition-navy);
    border-radius: 999px;
    font-size: 18px;
    font-weight: 900;
    letter-spacing: -.02em;
    box-shadow: 0 9px 22px rgba(16, 37, 63, .16);
}

.transition-eyebrow {
    margin: 0 0 12px;
    color: var(--transition-blue);
    font-size: 12px;
    font-weight: 900;
    letter-spacing: .2em;
}

.transition-hero h1 {
    max-width: 640px;
    margin: 0;
    color: var(--transition-navy);
    font-size: clamp(42px, 5vw, 66px);
    line-height: 1.14;
    letter-spacing: -.055em;
}

.transition-lead {
    max-width: 640px;
    margin: 26px 0 0;
    color: #33465d;
    font-size: 19px;
    line-height: 1.75;
}

.transition-note {
    max-width: 640px;
    margin: 20px 0 0;
    padding-left: 14px;
    color: var(--transition-muted);
    border-left: 3px solid var(--transition-mint);
    font-size: 14px;
}

.system-choice {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.system-card {
    display: flex;
    flex-direction: column;
    min-height: 330px;
    padding: 28px;
    background: rgba(255, 255, 255, .92);
    border: 1px solid rgba(197, 214, 224, .92);
    border-radius: 22px;
    box-shadow: 0 18px 48px rgba(27, 62, 83, .09);
}

.system-card--new {
    color: #fff;
    background: linear-gradient(155deg, var(--transition-blue) 0%, var(--transition-blue-dark) 100%);
    border-color: transparent;
    box-shadow: 0 22px 54px rgba(0, 92, 127, .24);
}

.system-card__topline {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.system-card__badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 28px;
    padding: 0 10px;
    color: var(--transition-muted);
    background: #eef3f6;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 900;
    letter-spacing: .08em;
}

.system-card--new .system-card__badge {
    color: var(--transition-navy);
    background: #9ee3dc;
}

.system-card__status {
    color: var(--transition-muted);
    font-size: 12px;
    font-weight: 700;
}

.system-card--new .system-card__status {
    color: rgba(255, 255, 255, .74);
}

.system-card h2 {
    margin: 32px 0 8px;
    font-size: 23px;
    letter-spacing: -.035em;
}

.system-card p {
    min-height: 50px;
    margin: 0;
    color: var(--transition-muted);
    font-size: 14px;
}

.system-card--new p {
    color: rgba(255, 255, 255, .8);
}

.system-card__domain {
    margin-top: auto;
    padding: 26px 0 11px;
    color: var(--transition-muted);
    font-size: 12px;
    font-weight: 800;
}

.system-card--new .system-card__domain {
    color: rgba(255, 255, 255, .72);
}

.system-button {
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    min-height: 54px;
    padding: 0 20px;
    border: 1px solid transparent;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 900;
    transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}

.system-button:hover {
    transform: translateY(-2px);
}

.system-button:focus-visible {
    outline: 3px solid #f3c969;
    outline-offset: 3px;
}

.system-button--secondary {
    color: var(--transition-navy);
    background: #fff;
    border-color: #cbd8e0;
}

.system-button--secondary:hover {
    background: #f7fafb;
    box-shadow: 0 8px 22px rgba(34, 65, 82, .1);
}

.system-button--primary {
    color: var(--transition-navy);
    background: #fff;
}

.system-button--primary:hover {
    box-shadow: 0 10px 26px rgba(0, 31, 47, .24);
}

.partner-section {
    padding: 104px 0 112px;
    background: var(--transition-navy);
}

.partner-section .section-heading {
    color: #fff;
}

.section-heading--wide {
    max-width: 850px;
}

.partner-section .transition-eyebrow {
    color: #84d8d1;
}

.partner-section .section-heading h2 {
    color: #fff;
}

.partner-section .section-heading > p:last-child {
    color: rgba(255, 255, 255, .68);
}

.partner-journey {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1fr);
    gap: 18px;
    align-items: center;
    margin-top: 48px;
}

.partner-card {
    display: flex;
    flex-direction: column;
    min-height: 405px;
    padding: 30px;
    color: var(--transition-ink);
    background: #fff;
    border: 1px solid rgba(255, 255, 255, .18);
    border-radius: 22px;
    box-shadow: 0 22px 48px rgba(0, 0, 0, .16);
}

.partner-card--accent {
    background: linear-gradient(155deg, #e8fbf8 0%, #fff 68%);
}

.partner-card--crm {
    background: linear-gradient(155deg, #dff5fb 0%, #fff 68%);
}

.partner-card__step {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.partner-card__step span {
    color: var(--transition-blue);
    font-size: 13px;
    font-weight: 900;
    letter-spacing: .14em;
}

.partner-card__step em {
    padding: 5px 10px;
    color: var(--transition-blue-dark);
    background: var(--transition-sky);
    border-radius: 999px;
    font-size: 11px;
    font-style: normal;
    font-weight: 800;
}

.partner-card__brand {
    margin: 38px 0 8px;
    color: var(--transition-muted);
    font-size: 11px;
    font-weight: 900;
    letter-spacing: .15em;
}

.partner-card h3 {
    margin: 0;
    color: var(--transition-navy);
    font-size: 23px;
    line-height: 1.35;
    letter-spacing: -.035em;
}

.partner-card__description {
    margin: 18px 0 0;
    color: var(--transition-muted);
    font-size: 14px;
    line-height: 1.75;
}

.partner-card__domain {
    margin-top: auto;
    padding: 28px 0 12px;
    color: var(--transition-muted);
    font-size: 12px;
    font-weight: 800;
}

.partner-link {
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    min-height: 50px;
    padding: 0 18px;
    color: #fff;
    background: var(--transition-navy);
    border-radius: 11px;
    font-size: 13px;
    font-weight: 900;
    transition: transform .18s ease, background .18s ease;
}

.partner-link:hover {
    background: var(--transition-blue);
    transform: translateY(-2px);
}

.partner-link:focus-visible {
    outline: 3px solid #f3c969;
    outline-offset: 3px;
}

.partner-journey__arrow {
    color: #84d8d1;
    font-size: 25px;
    font-weight: 900;
}

.partner-context {
    margin: 28px 0 0;
    padding: 20px 24px;
    color: rgba(255, 255, 255, .7);
    background: rgba(255, 255, 255, .07);
    border: 1px solid rgba(255, 255, 255, .1);
    border-radius: 14px;
    font-size: 14px;
}

.partner-context strong {
    margin-right: 7px;
    color: #fff;
}

.change-section {
    padding: 104px 0 112px;
    background: #fff;
}

.section-heading {
    max-width: 720px;
}

.section-heading h2,
.transition-cta h2 {
    margin: 0;
    color: var(--transition-navy);
    font-size: clamp(30px, 4vw, 44px);
    line-height: 1.25;
    letter-spacing: -.045em;
}

.section-heading > p:last-child {
    margin: 18px 0 0;
    color: var(--transition-muted);
    font-size: 17px;
}

.change-summary {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 28px;
    align-items: center;
    margin: 45px 0 30px;
    padding: 28px 34px;
    background: var(--transition-soft);
    border: 1px solid var(--transition-line);
    border-radius: 18px;
}

.change-summary > div {
    display: flex;
    align-items: center;
    gap: 14px;
}

.change-summary span:not(.change-summary__arrow) {
    flex: 0 0 auto;
    padding: 5px 9px;
    color: var(--transition-muted);
    background: #fff;
    border: 1px solid var(--transition-line);
    border-radius: 7px;
    font-size: 11px;
    font-weight: 900;
}

.change-summary > div:last-child span {
    color: var(--transition-blue-dark);
    background: var(--transition-sky);
    border-color: #b9dfe9;
}

.change-summary strong {
    font-size: 15px;
}

.change-summary__arrow {
    color: var(--transition-blue);
    font-size: 24px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    border-top: 1px solid var(--transition-line);
    border-left: 1px solid var(--transition-line);
}

.feature-card {
    min-height: 238px;
    padding: 30px 27px;
    border-right: 1px solid var(--transition-line);
    border-bottom: 1px solid var(--transition-line);
    transition: background .18s ease, transform .18s ease;
}

.feature-card:hover {
    position: relative;
    z-index: 1;
    background: #f7fbfc;
    transform: translateY(-3px);
}

.feature-card--guide {
    background: var(--transition-sky);
}

.feature-card__number {
    color: var(--transition-blue);
    font-size: 12px;
    font-weight: 900;
    letter-spacing: .13em;
}

.feature-card h3 {
    margin: 34px 0 10px;
    color: var(--transition-navy);
    font-size: 19px;
    letter-spacing: -.025em;
}

.feature-card p {
    margin: 0;
    color: var(--transition-muted);
    font-size: 14px;
    line-height: 1.72;
}

.transition-cta {
    padding: 74px 0;
    color: #fff;
    background: var(--transition-navy);
}

.transition-cta__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
}

.transition-cta .transition-eyebrow {
    color: #84d8d1;
}

.transition-cta h2 {
    color: #fff;
}

.transition-cta p:last-child {
    margin: 13px 0 0;
    color: rgba(255, 255, 255, .68);
}

.system-button--light {
    flex: 0 0 260px;
    color: var(--transition-navy);
    background: #fff;
}

.transition-footer {
    padding: 28px 0;
    background: #0b192b;
}

.transition-footer .transition-shell {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
}

.transition-footer span {
    color: #fff;
    font-weight: 900;
    letter-spacing: .12em;
}

.transition-footer p {
    margin: 0;
    color: rgba(255, 255, 255, .55);
    font-size: 12px;
}

@media (max-width: 1040px) {
    .transition-hero__inner {
        grid-template-columns: 1fr;
        gap: 44px;
        min-height: auto;
    }

    .system-choice {
        max-width: 720px;
    }

    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .partner-journey {
        grid-template-columns: 1fr;
        max-width: 720px;
    }

    .partner-card {
        min-height: 350px;
    }

    .partner-journey__arrow {
        justify-self: center;
        transform: rotate(90deg);
    }
}

@media (max-width: 700px) {
    .transition-shell {
        width: min(100% - 32px, 1180px);
    }

    .transition-header {
        height: 64px;
    }

    .transition-brand img {
        height: 29px;
    }

    .transition-header__label {
        display: none;
    }

    .transition-hero__inner {
        padding-top: 52px;
        padding-bottom: 56px;
    }

    .transition-dday {
        height: 42px;
        margin-bottom: 22px;
        font-size: 16px;
    }

    .transition-hero h1 {
        font-size: 40px;
    }

    .transition-lead {
        margin-top: 20px;
        font-size: 17px;
    }

    .system-choice {
        grid-template-columns: 1fr;
    }

    .system-card {
        min-height: 292px;
    }

    .change-section {
        padding: 74px 0 80px;
    }

    .partner-section {
        padding: 74px 0 80px;
    }

    .partner-section .section-heading h2 br {
        display: none;
    }

    .partner-card {
        min-height: 335px;
        padding: 26px;
    }

    .change-summary {
        grid-template-columns: 1fr;
        gap: 14px;
        padding: 24px;
    }

    .change-summary__arrow {
        transform: rotate(90deg);
        justify-self: center;
    }

    .feature-grid {
        grid-template-columns: 1fr;
    }

    .feature-card {
        min-height: 0;
    }

    .feature-card h3 {
        margin-top: 20px;
    }

    .transition-cta__inner,
    .transition-footer .transition-shell {
        align-items: flex-start;
        flex-direction: column;
    }

    .system-button--light {
        flex: none;
        width: 100%;
    }
}

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

    .system-button,
    .feature-card,
    .partner-link {
        transition: none;
    }
}