:root {
    --page-bg: #f7fafc;
    --text-strong: #0d141c;
    --text-muted: #4d7399;
    --white: #ffffff;
    --brand: #1280ed;
    --card-bg: #f7fafc;
    --card-bd: #cfdbe8;
    --container-max: 960px;
    --radius: 8px;
    --gap-lg: 40px;
    --gap-md: 16px;
    --gap-sm: 12px;
    --pad-x: 16px;
    --hero-pad-y: 20px;
}

* {
    box-sizing: border-box;
}

html,
body {
    height: 100%;
}

body {
    margin: 0;
    font-family: "Noto Sans KR", system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
    color: var(--text-strong);
    line-height: 1.5;
}

/* 공통 레이아웃 */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--pad-x);
}

.section {
    padding: var(--gap-lg) 0;
}

.section h2 {
    margin: 0 0 var(--gap-md) 0;
    font-weight: 900;
    font-size: 36px;
    letter-spacing: -1px;
}

.section p.lead {
    margin: 0;
    font-size: 16px;
    color: var(--text-strong);
}

/* 1) 전환 섹션 (영웅 배경 + 문구 + 버튼) */
.section-conversion {
    position: relative;
    padding: var(--hero-pad-y) 0;
    /* 배경 이미지 + 그라데이션 */
    background-image:
        linear-gradient(90deg, rgba(0, 0, 0, 0.10) 0%, rgba(0, 0, 0, 0.40) 100%),
        url("/img/feature.jpg");
    background-size: cover;
    background-position: 50% 50%;
    color: var(--white);
}

.conversion-wrap {
    min-height: 480px;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding: 11px 0;
}

.conversion-content {
    width: 100%;
    max-width: calc(var(--container-max) - 2 * var(--pad-x));
    padding: var(--pad-x);
    border-radius: var(--radius);
}

.conversion-title {
    margin: 0 0 8px 0;
    font-weight: 900;
    font-size: 48px;
    line-height: 60px;
    letter-spacing: -2px;
    text-align: center;
    color: #fff;
}

.conversion-desc {
    margin: 0 0 32px 0;
    text-align: center;
    font-size: 16px;
    color: #fff;
}

.conversion-actions {
    display: flex;
    justify-content: center;
}

.action-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 84px;
    max-width: 480px;
    height: 48px;
    padding: 0 20px;
    border: 0;
    border-radius: var(--radius);
    background: var(--brand);
    color: var(--page-bg);
    font-weight: 700;
    font-size: 16px;
    text-decoration: none;
    cursor: pointer;
}

.action-button:visited {
    color: var(--page-bg);
}

.action-button:hover {
    filter: brightness(1.05);
}

.action-button:active {
    filter: brightness(0.95);
}

/* 2) 제품 가치 제시 (주요 기능 카드 4개) */
.section-value-proposition .lead {
    color: var(--text-strong);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--gap-sm);
    margin-top: var(--gap-md);
}

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--card-bd);
    border-radius: var(--radius);
    padding: 17px;
    display: flex;
    flex-direction: column;
    gap: var(--gap-sm);
    height: 100%;
}

.feature-card__icon {
    width: 24px;
    height: 24px;
    flex: 0 0 auto;
    overflow: hidden;
}

.feature-card__title {
    margin: 0 0 4px 0;
    font-weight: 700;
    font-size: 16px;
    color: var(--text-strong);
}

.feature-card__desc {
    margin: 0;
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.5;
}

/* 3) 신뢰·증거 (시각 예시 4개) */
.section-evidence .lead {
    color: var(--text-strong);
}

.evidence-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--gap-sm);
    margin-top: var(--gap-md);
}

.evidence-card {
    display: flex;
    flex-direction: column;
    gap: var(--gap-sm);
}

.evidence-thumb {
    width: 100%;
    height: 125px;
    border-radius: var(--radius);
    object-fit: cover;
    display: block;
}

.evidence-card__title {
    margin: 0;
    font-weight: 500;
    font-size: 16px;
    color: var(--text-strong);
}

.evidence-card__desc {
    margin: 0;
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.5;
}

/* 하단 정보(푸터 유사) */
.site-info {
    background: #ededed;
    padding: var(--gap-lg) 0;
}

.site-info__brand {
    text-align: center;
    font-size: 24px;
    margin-bottom: var(--gap-lg);
}

.site-info__links {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    justify-content: space-between;
    margin-bottom: var(--gap-lg);
}

.site-info__links a {
    display: block;
    min-width: 160px;
    text-align: center;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 16px;
}

.site-info__meta {
    display: grid;
    gap: 8px;
    justify-items: center;
    margin-bottom: var(--gap-md);
}

.site-info__meta p {
    margin: 0;
    font-size: 14px;
    color: var(--text-muted);
}

.site-info__copy {
    text-align: center;
    font-size: 14px;
    color: var(--text-muted);
}

/* 반응형 */
@media (max-width: 1024px) {

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

    .conversion-title {
        font-size: 38px;
        line-height: 50px;
    }
}

@media (max-width: 640px) {

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

    .conversion-title {
        font-size: 30px;
        line-height: 40px;
        letter-spacing: -1px;
    }
}

/* =============================
   Motion: Fade Up
============================= */
.motion-fade-up {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 520ms ease, transform 520ms ease;
    will-change: opacity, transform;
}

.motion-fade-up.is-inview {
    opacity: 1;
    transform: translateY(0);
}

/* 순차 딜레이는 JS가 --motion-delay(ms)로 주입 */
.motion-stagger {
    transition-delay: var(--motion-delay, 0ms);
}