.seo-intro {
    position: fixed;
    inset: 0;
    z-index: 14000;
    display: flex;
    align-items: flex-end;
    justify-content: flex-start;
    padding: clamp(20px, 4vw, 48px);
    background:
        radial-gradient(circle at 12% 18%, rgba(107, 198, 255, 0.22), transparent 28%),
        radial-gradient(circle at 88% 16%, rgba(255, 192, 105, 0.16), transparent 24%),
        linear-gradient(180deg, rgba(7, 10, 18, 0.18), rgba(7, 10, 18, 0.72));
    pointer-events: none;
    transition:
        opacity 560ms ease,
        transform 560ms ease,
        visibility 560ms step-end;
}

.seo-intro::before,
.seo-intro::after {
    content: '';
    position: absolute;
    inset: auto;
    border-radius: 999px;
    filter: blur(0);
    opacity: 0.55;
    animation: seoFloat 9s ease-in-out infinite;
}

.seo-intro::before {
    top: 10%;
    right: 8%;
    width: 180px;
    height: 180px;
    background: radial-gradient(circle, rgba(124, 220, 255, 0.28), rgba(124, 220, 255, 0));
}

.seo-intro::after {
    bottom: 18%;
    left: 10%;
    width: 240px;
    height: 240px;
    background: radial-gradient(circle, rgba(255, 201, 94, 0.18), rgba(255, 201, 94, 0));
    animation-duration: 12s;
}

.seo-intro-card {
    position: relative;
    max-width: min(760px, calc(100vw - 40px));
    padding: clamp(22px, 4vw, 34px);
    border: 1px solid rgba(162, 220, 255, 0.26);
    border-radius: 28px;
    background:
        linear-gradient(180deg, rgba(18, 24, 40, 0.92), rgba(10, 14, 24, 0.84)),
        linear-gradient(135deg, rgba(110, 208, 255, 0.12), transparent 42%);
    box-shadow:
        0 26px 70px rgba(0, 0, 0, 0.48),
        inset 0 1px 0 rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(18px);
    pointer-events: auto;
    overflow: hidden;
}

.seo-intro-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
        linear-gradient(120deg, rgba(255, 255, 255, 0.1), transparent 18%, transparent 82%, rgba(255, 255, 255, 0.06)),
        repeating-linear-gradient(135deg, rgba(99, 209, 255, 0.08) 0 2px, transparent 2px 18px);
    opacity: 0.45;
    pointer-events: none;
}

.seo-kicker,
.seo-title,
.seo-lead,
.seo-chip-list,
.seo-link-row,
.seo-feature-grid,
.seo-noscript {
    position: relative;
    z-index: 1;
}

.seo-kicker {
    margin: 0 0 10px;
    color: #8edaff;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.28em;
}

.seo-title {
    margin: 0;
    color: #f5fbff;
    font-size: clamp(2rem, 4.8vw, 4rem);
    line-height: 0.95;
}

.seo-lead {
    margin: 18px 0 0;
    max-width: 62ch;
    color: rgba(233, 241, 255, 0.92);
    font-size: clamp(0.98rem, 1.9vw, 1.12rem);
    line-height: 1.65;
}

.seo-chip-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 18px 0 0;
}

.seo-chip {
    display: inline-flex;
    align-items: center;
    min-height: 36px;
    padding: 0 14px;
    border: 1px solid rgba(152, 213, 255, 0.24);
    border-radius: 999px;
    background: rgba(12, 20, 34, 0.66);
    color: #ddf4ff;
    font-size: 0.92rem;
    font-weight: 700;
}

.seo-link-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 20px 0 0;
}

.seo-link-row a {
    color: #fff2ba;
    text-decoration: none;
    font-weight: 700;
}

.seo-link-row a:hover {
    color: #ffffff;
    text-decoration: underline;
}

.seo-feature-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    margin-top: 22px;
}

.seo-feature-card {
    min-height: 100%;
    padding: 16px 16px 18px;
    border: 1px solid rgba(152, 213, 255, 0.18);
    border-radius: 18px;
    background: rgba(9, 14, 24, 0.55);
}

.seo-feature-card h2 {
    margin: 0 0 8px;
    color: #f7fbff;
    font-size: 1.02rem;
}

.seo-feature-card p {
    margin: 0;
    color: rgba(222, 232, 246, 0.86);
    font-size: 0.92rem;
    line-height: 1.55;
}

.seo-noscript {
    position: fixed;
    right: 18px;
    bottom: 18px;
    z-index: 14010;
    max-width: min(460px, calc(100vw - 36px));
    padding: 14px 16px;
    border: 1px solid rgba(255, 226, 149, 0.28);
    border-radius: 16px;
    background: rgba(16, 18, 26, 0.92);
    color: #fff2ba;
    line-height: 1.5;
}

.seo-noscript a {
    color: #ffffff;
}

html[data-app-ready='true'] .seo-intro {
    opacity: 0;
    transform: translateY(14px) scale(0.98);
    visibility: hidden;
}

.seo-page-body {
    margin: 0;
    min-height: 100vh;
    color: #eef4ff;
    font-family: 'Noto Sans KR', 'Inter', system-ui, -apple-system, sans-serif;
    background:
        radial-gradient(circle at top, rgba(104, 198, 255, 0.18), transparent 28%),
        linear-gradient(180deg, #09101b, #06080f 62%, #04050a 100%);
}

.seo-page-shell {
    width: min(1120px, calc(100vw - 40px));
    margin: 0 auto;
    padding: clamp(28px, 5vw, 56px) 0 72px;
}

.seo-page-hero {
    position: relative;
    overflow: hidden;
    padding: clamp(28px, 4vw, 44px);
    border: 1px solid rgba(156, 216, 255, 0.22);
    border-radius: 30px;
    background:
        linear-gradient(180deg, rgba(13, 19, 31, 0.94), rgba(9, 14, 24, 0.88)),
        linear-gradient(135deg, rgba(99, 209, 255, 0.14), transparent 44%);
    box-shadow: 0 28px 70px rgba(0, 0, 0, 0.42);
}

.seo-page-hero::after {
    content: '';
    position: absolute;
    inset: auto -80px -80px auto;
    width: 240px;
    height: 240px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 208, 106, 0.18), transparent 68%);
    pointer-events: none;
}

.seo-page-kicker {
    margin: 0 0 10px;
    color: #90ddff;
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.24em;
}

.seo-page-title {
    margin: 0;
    font-size: clamp(2.1rem, 4.8vw, 4.2rem);
    line-height: 0.97;
}

.seo-page-lead {
    margin: 18px 0 0;
    max-width: 68ch;
    color: rgba(233, 241, 255, 0.9);
    font-size: 1.05rem;
    line-height: 1.7;
}

.seo-page-nav,
.seo-page-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 20px;
}

.seo-page-nav a,
.seo-page-links a {
    display: inline-flex;
    align-items: center;
    min-height: 40px;
    padding: 0 14px;
    border: 1px solid rgba(162, 220, 255, 0.22);
    border-radius: 999px;
    background: rgba(12, 18, 28, 0.66);
    color: #eff7ff;
    text-decoration: none;
    font-weight: 700;
}

.seo-page-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
    margin-top: 22px;
}

.seo-page-card,
.seo-page-faq-item {
    padding: 22px;
    border: 1px solid rgba(151, 213, 255, 0.18);
    border-radius: 22px;
    background: rgba(10, 15, 24, 0.76);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.seo-page-card h2,
.seo-page-faq-item h2,
.seo-page-faq-item h3 {
    margin: 0 0 10px;
    color: #fbfdff;
}

.seo-page-card p,
.seo-page-card li,
.seo-page-faq-item p {
    color: rgba(226, 235, 247, 0.86);
    line-height: 1.7;
}

.seo-page-card ul {
    margin: 12px 0 0;
    padding-left: 18px;
}

.seo-page-section {
    margin-top: 18px;
}

.seo-page-note {
    margin-top: 20px;
    padding: 18px 20px;
    border-left: 3px solid rgba(255, 209, 117, 0.72);
    border-radius: 14px;
    background: rgba(255, 210, 112, 0.08);
    color: #fff2bf;
    line-height: 1.7;
}

.seo-page-footer {
    margin-top: 28px;
    color: rgba(198, 210, 226, 0.72);
    font-size: 0.94rem;
}

@keyframes seoFloat {
    0%,
    100% {
        transform: translate3d(0, 0, 0) scale(1);
    }
    50% {
        transform: translate3d(0, -14px, 0) scale(1.04);
    }
}

@media (max-width: 900px) {
    .seo-feature-grid,
    .seo-page-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .seo-intro {
        align-items: center;
    }

    .seo-intro-card {
        max-height: calc(100vh - 36px);
        overflow: auto;
    }

    .seo-link-row,
    .seo-page-nav,
    .seo-page-links {
        gap: 10px;
    }

    .seo-page-shell {
        width: min(100vw - 28px, 1120px);
    }
}

@media (prefers-reduced-motion: reduce) {
    .seo-intro,
    .seo-intro::before,
    .seo-intro::after {
        animation: none;
        transition: none;
    }
}