:root {
    --ink: #191f28;
    --ink-soft: #4e5968;
    --ink-faint: #8b95a1;
    --night: #101828;
    --night-soft: #1a2436;
    --paper: #ffffff;
    --cloud: #f6f8fb;
    --mist: #eef2f7;
    --blue-wash: #eef4ff;
    --line: #e8ecf1;
    --blue: #3182f6;
    --blue-deep: #1b64da;
    --teal: #00b493;
    --teal-deep: #0d8f76;
    --teal-soft: #e6f8f3;
    --shell: 1140px;
    --radius-sm: 16px;
    --radius-md: 24px;
    --radius-lg: 32px;
    --shadow-card: 0 2px 6px rgba(16, 24, 40, 0.03), 0 18px 44px rgba(16, 24, 40, 0.07);
    --shadow-lift: 0 6px 14px rgba(16, 24, 40, 0.05), 0 30px 64px rgba(16, 24, 40, 0.12);
    --shadow-btn: 0 10px 26px rgba(49, 130, 246, 0.3);
    --ease-out: cubic-bezier(0.2, 0.7, 0.3, 1); }
* {
    box-sizing: border-box; }
html {
    scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
    line-height: 1.6;
    word-break: keep-all;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility; }
a {
    color: inherit; }
::selection {
    background: rgba(49, 130, 246, 0.18); }
.shell {
    width: min(calc(100% - 40px), var(--shell));
    margin-inline: auto; }
.skip-link {
    position: fixed;
    top: 10px;
    left: 10px;
    z-index: 100;
    padding: 10px 14px;
    border-radius: 10px;
    background: var(--paper);
    box-shadow: var(--shadow-card);
    color: var(--ink);
    font-weight: 800;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-16px); }
.skip-link:focus {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0); }

/* ---------- scroll reveal ---------- */
[data-reveal] {
    opacity: 0;
    transform: translateY(26px);
    transition: opacity 0.7s ease, transform 0.7s var(--ease-out); }
[data-reveal].revealed {
    opacity: 1;
    transform: none; }
.context-grid [data-reveal]:nth-child(2) { transition-delay: 0.07s; }
.context-grid [data-reveal]:nth-child(3) { transition-delay: 0.14s; }
.context-grid [data-reveal]:nth-child(4) { transition-delay: 0.21s; }
.context-grid [data-reveal]:nth-child(5) { transition-delay: 0.28s; }
.context-grid [data-reveal]:nth-child(6) { transition-delay: 0.35s; }
.method-list [data-reveal]:nth-child(2) { transition-delay: 0.06s; }
.method-list [data-reveal]:nth-child(3) { transition-delay: 0.12s; }
.method-list [data-reveal]:nth-child(4) { transition-delay: 0.18s; }
.method-list [data-reveal]:nth-child(5) { transition-delay: 0.24s; }
.trust-grid [data-reveal]:nth-child(2) { transition-delay: 0.08s; }
.trust-grid [data-reveal]:nth-child(3) { transition-delay: 0.16s; }

/* ---------- header ---------- */
.product-header {
    position: fixed;
    top: 0;
    right: 0;
    left: 0;
    z-index: 20;
    border-bottom: 1px solid rgba(16, 24, 40, 0.06);
    background: rgba(255, 255, 255, 0.78);
    backdrop-filter: blur(18px) saturate(1.5);
    -webkit-backdrop-filter: blur(18px) saturate(1.5);
    color: var(--ink); }
.product-nav {
    display: flex;
    min-height: 68px;
    align-items: center;
    justify-content: space-between;
    gap: 24px; }
.product-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 17px;
    font-weight: 800;
    letter-spacing: -0.02em;
    text-decoration: none; }
.brand-mark {
    display: grid;
    width: 32px;
    height: 32px;
    place-items: center;
    border-radius: 10px;
    background: linear-gradient(150deg, #5c9dff, var(--blue) 60%);
    box-shadow: 0 6px 16px rgba(49, 130, 246, 0.32);
    color: #ffffff;
    font-size: 14px;
    font-weight: 800; }
.nav-links {
    display: flex;
    align-items: center;
    gap: 4px; }
.nav-links a {
    padding: 8px 13px;
    border-radius: 10px;
    color: var(--ink-soft);
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    transition: background 160ms ease, color 160ms ease; }
.nav-links a:hover {
    background: var(--mist);
    color: var(--ink); }
.nav-links a[aria-current="page"] {
    background: var(--blue-wash);
    color: var(--blue-deep);
    font-weight: 700; }

/* ---------- hero ---------- */
.product-hero {
    position: relative;
    overflow: hidden;
    padding: 150px 0 96px;
    background:
        radial-gradient(56% 48% at 84% 12%, rgba(49, 130, 246, 0.1), transparent 70%),
        radial-gradient(44% 42% at 8% 92%, rgba(0, 180, 147, 0.07), transparent 70%),
        linear-gradient(180deg, #fbfcfe 0%, #f3f7fc 100%);
    color: var(--ink); }
.product-hero::before {
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle, rgba(16, 24, 40, 0.055) 1px, transparent 1.4px);
    background-size: 26px 26px;
    content: "";
    mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 62%);
    -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 62%);
    pointer-events: none; }
.hero-orbit {
    position: absolute;
    border: 1px solid rgba(49, 130, 246, 0.12);
    border-radius: 50%;
    pointer-events: none; }
.hero-orbit-one {
    right: -210px;
    bottom: -310px;
    width: 650px;
    height: 650px;
    box-shadow: 0 0 0 72px rgba(49, 130, 246, 0.03), 0 0 0 144px rgba(49, 130, 246, 0.02); }
.hero-orbit-two {
    top: 120px;
    left: -240px;
    width: 390px;
    height: 390px;
    border-color: rgba(0, 180, 147, 0.1); }
.hero-layout {
    position: relative;
    z-index: 1;
    display: grid;
    gap: 54px; }
.eyebrow {
    margin: 0 0 16px;
    color: var(--blue-deep);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.14em; }
.light-eyebrow {
    color: #7fa8f5; }
.hero-copy h1 {
    max-width: 710px;
    margin: 0;
    font-size: clamp(36px, 8.6vw, 60px);
    font-weight: 800;
    letter-spacing: -0.028em;
    line-height: 1.28; }
.hero-copy h1 span {
    color: var(--blue); }
.hero-lead {
    max-width: 620px;
    margin: 24px 0 0;
    color: var(--ink-soft);
    font-size: 17px;
    line-height: 1.8; }
.hero-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 34px;
    flex-wrap: wrap; }
.primary-action,
.secondary-action {
    display: inline-flex;
    min-height: 54px;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 26px;
    border-radius: 16px;
    font-size: 15px;
    font-weight: 700;
    text-decoration: none;
    transition: background 180ms ease, box-shadow 180ms ease, transform 180ms ease, border-color 180ms ease; }
.primary-action {
    background: var(--blue);
    box-shadow: var(--shadow-btn);
    color: #ffffff; }
.primary-action:hover {
    background: #2673e8;
    box-shadow: 0 14px 32px rgba(49, 130, 246, 0.36);
    transform: translateY(-2px); }
.primary-action:active {
    transform: translateY(0) scale(0.98); }
.secondary-action {
    border: 1px solid var(--line);
    background: var(--paper);
    color: var(--ink-soft); }
.secondary-action:hover {
    border-color: #d3dae3;
    background: var(--cloud);
    color: var(--ink);
    transform: translateY(-2px); }
.primary-action:focus-visible,
.secondary-action:focus-visible,
.nav-links a:focus-visible,
.product-brand:focus-visible,
.footer-links a:focus-visible,
.mobile-start a:focus-visible {
    outline: 3px solid rgba(49, 130, 246, 0.45);
    outline-offset: 3px; }
.hero-proof {
    display: flex;
    gap: 10px 22px;
    margin: 28px 0 0;
    padding: 0;
    color: var(--ink-faint);
    flex-wrap: wrap;
    font-size: 13px;
    font-weight: 500;
    list-style: none; }
.hero-proof li {
    display: inline-flex;
    align-items: center; }
.hero-proof li::before {
    margin-right: 7px;
    color: var(--teal);
    content: "✓";
    font-weight: 800; }

/* ---------- hero map card ---------- */
.hero-map {
    align-self: center;
    padding: 24px;
    border: 1px solid rgba(16, 24, 40, 0.06);
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.92);
    box-shadow: var(--shadow-lift);
    backdrop-filter: blur(16px); }
.map-heading {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 18px;
    padding: 0 4px 18px;
    border-bottom: 1px solid var(--line); }
.map-heading span {
    color: var(--ink-faint);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.12em; }
.map-heading strong {
    font-size: 15px;
    font-weight: 700;
    letter-spacing: -0.01em; }
.signal-path {
    display: grid;
    gap: 8px;
    margin: 18px 0 0;
    padding: 0;
    list-style: none; }
.signal-path li {
    display: grid;
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 12px;
    align-items: center;
    padding: 12px 14px;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    background: var(--cloud);
    transition: background 180ms ease, border-color 180ms ease, transform 180ms ease; }
.signal-path li:hover {
    border-color: var(--line);
    background: var(--paper);
    transform: translateX(3px); }
.signal-path > li > span {
    display: grid;
    width: 30px;
    height: 30px;
    place-items: center;
    border-radius: 9px;
    background: var(--paper);
    color: var(--ink-faint);
    font-size: 11px;
    font-weight: 700;
    font-variant-numeric: tabular-nums; }
.signal-path strong,
.signal-path small {
    display: block; }
.signal-path strong {
    font-size: 14px;
    font-weight: 700;
    letter-spacing: -0.01em; }
.signal-path small {
    margin-top: 2px;
    color: var(--ink-faint);
    font-size: 11px; }
.signal-path .signal-result {
    border-color: rgba(0, 180, 147, 0.24);
    background: var(--teal-soft); }
.signal-path .signal-result > span {
    background: rgba(0, 180, 147, 0.14);
    color: var(--teal-deep); }
.signal-path .signal-result strong {
    color: var(--teal-deep); }
.map-caption {
    margin: 16px 4px 0;
    color: var(--ink-faint);
    font-size: 12px;
    text-align: center; }

/* ---------- sections ---------- */
.product-section {
    padding: 88px 0; }
.section-heading {
    max-width: 720px;
    margin-bottom: 44px; }
.centered-heading {
    margin-right: auto;
    margin-left: auto;
    text-align: center; }
.section-heading h2,
.method-intro h2,
.advanced-card h2,
.final-card h2 {
    margin: 0;
    font-size: clamp(28px, 6.4vw, 42px);
    font-weight: 800;
    letter-spacing: -0.026em;
    line-height: 1.35; }
.section-heading > p:last-child,
.method-intro > p:last-child {
    margin: 18px 0 0;
    color: var(--ink-soft);
    font-size: 15px;
    line-height: 1.85; }
.auto-section {
    background: var(--paper); }

/* ---------- context cards ---------- */
.context-grid {
    display: grid;
    gap: 14px; }
.context-card {
    position: relative;
    min-height: 226px;
    overflow: hidden;
    padding: 26px;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: var(--paper);
    transition: box-shadow 220ms ease, transform 220ms var(--ease-out), border-color 220ms ease; }
.context-card:hover {
    border-color: #dbe2ea;
    box-shadow: var(--shadow-card);
    transform: translateY(-5px); }
.context-number {
    display: grid;
    width: 36px;
    height: 36px;
    place-items: center;
    border-radius: 11px;
    background: var(--blue-wash);
    color: var(--blue-deep);
    font-size: 12px;
    font-weight: 700;
    font-variant-numeric: tabular-nums; }
.context-card h3 {
    margin: 20px 0 8px;
    font-size: 19px;
    font-weight: 700;
    letter-spacing: -0.02em; }
.context-card p {
    margin: 0;
    color: var(--ink-soft);
    font-size: 13.5px;
    line-height: 1.75; }
.context-card small {
    position: absolute;
    right: 24px;
    bottom: 20px;
    color: #a8b2bf;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.09em; }
.featured-card {
    border-color: rgba(49, 130, 246, 0.22);
    background: linear-gradient(160deg, var(--blue-wash), #ffffff 72%); }
.filter-card {
    border-color: rgba(0, 180, 147, 0.24);
    background: linear-gradient(160deg, var(--teal-soft), #ffffff 72%); }
.filter-card .context-number {
    background: rgba(0, 180, 147, 0.13);
    color: var(--teal-deep); }

/* ---------- method (dark) ---------- */
.method-section {
    background:
        radial-gradient(46% 40% at 10% 90%, rgba(0, 180, 147, 0.09), transparent 70%),
        radial-gradient(50% 44% at 92% 8%, rgba(49, 130, 246, 0.12), transparent 70%),
        linear-gradient(180deg, var(--night) 0%, #141e30 100%);
    color: #ffffff; }
.method-layout {
    display: grid;
    gap: 46px; }
.method-intro > p:last-child {
    color: #9aa7bb; }
.method-list {
    display: grid;
    gap: 10px;
    margin: 0;
    padding: 0;
    list-style: none; }
.method-list li {
    display: grid;
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 15px;
    align-items: start;
    padding: 18px;
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.045);
    transition: background 200ms ease, border-color 200ms ease, transform 200ms var(--ease-out); }
.method-list li:hover {
    border-color: rgba(255, 255, 255, 0.13);
    background: rgba(255, 255, 255, 0.07);
    transform: translateX(4px); }
.method-list > li > span {
    display: grid;
    width: 38px;
    height: 38px;
    place-items: center;
    border-radius: 12px;
    background: rgba(49, 130, 246, 0.18);
    color: #8fb4fa;
    font-size: 12px;
    font-weight: 700;
    font-variant-numeric: tabular-nums; }
.method-list strong {
    font-size: 15px;
    font-weight: 700;
    letter-spacing: -0.01em; }
.method-list p {
    margin: 4px 0 0;
    color: #93a1b5;
    font-size: 12.5px;
    line-height: 1.7; }

/* ---------- outcome ---------- */
.outcome-section {
    background: var(--cloud); }
.outcome-layout {
    display: grid;
    gap: 36px;
    align-items: center; }
.outcome-heading {
    margin-bottom: 0; }
.outcome-card {
    overflow: hidden;
    padding: 24px;
    border: 1px solid rgba(16, 24, 40, 0.05);
    border-radius: var(--radius-lg);
    background: var(--paper);
    box-shadow: var(--shadow-card); }
.outcome-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    padding: 4px 4px 18px;
    border-bottom: 1px solid var(--line); }
.outcome-top span,
.outcome-top strong {
    display: block; }
.outcome-top div > span {
    color: var(--ink-faint);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.12em; }
.outcome-top strong {
    margin-top: 5px;
    font-size: 17px;
    font-weight: 700;
    letter-spacing: -0.01em; }
.outcome-top .output-status {
    padding: 7px 11px;
    border-radius: 999px;
    background: var(--teal-soft);
    color: var(--teal-deep);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.06em; }
.output-list {
    display: grid;
    gap: 8px;
    margin: 18px 0 0;
    padding: 0;
    list-style: none; }
.output-list li {
    display: grid;
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 12px;
    align-items: center;
    padding: 13px 14px;
    border: 1px solid transparent;
    border-radius: 14px;
    background: var(--cloud);
    transition: background 180ms ease, border-color 180ms ease; }
.output-list li:hover {
    border-color: rgba(49, 130, 246, 0.18);
    background: var(--blue-wash); }
.output-list > li > span {
    color: var(--blue-deep);
    font-size: 11px;
    font-weight: 700;
    font-variant-numeric: tabular-nums; }
.output-list strong {
    font-size: 13.5px;
    font-weight: 700; }
.output-list p {
    margin: 2px 0 0;
    color: var(--ink-faint);
    font-size: 11.5px; }
.output-note {
    margin: 16px 0 0;
    color: var(--ink-faint);
    font-size: 12px;
    text-align: center; }

/* ---------- comparison ---------- */
.comparison-section {
    background: var(--paper); }
.comparison-table {
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card); }
.comparison-row {
    display: grid;
    gap: 6px;
    padding: 20px;
    border-bottom: 1px solid var(--line);
    background: var(--paper); }
.comparison-row:last-child {
    border-bottom: 0; }
.comparison-row strong {
    font-size: 14.5px;
    font-weight: 700; }
.comparison-row span {
    color: var(--ink-soft);
    font-size: 13px; }
.comparison-head {
    display: none;
    background: var(--cloud);
    color: var(--ink-faint); }
.comparison-head span {
    color: var(--ink-faint);
    font-size: 11.5px;
    font-weight: 700;
    letter-spacing: 0.04em; }
.product-row {
    background: linear-gradient(100deg, var(--blue-wash), #f8fbff); }
.product-row strong {
    color: var(--blue-deep); }
.product-row span {
    color: #3b5b8f; }

/* ---------- trust ---------- */
.trust-section {
    background: var(--blue-wash); }
.trust-grid {
    display: grid;
    gap: 14px; }
.trust-card {
    padding: 26px;
    border: 1px solid rgba(49, 130, 246, 0.1);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.9);
    transition: box-shadow 220ms ease, transform 220ms var(--ease-out); }
.trust-card:hover {
    box-shadow: var(--shadow-card);
    transform: translateY(-5px); }
.trust-icon {
    display: grid;
    width: 36px;
    height: 36px;
    place-items: center;
    border-radius: 11px;
    background: var(--blue-wash);
    color: var(--blue-deep);
    font-size: 12px;
    font-weight: 700;
    font-variant-numeric: tabular-nums; }
.trust-card h3 {
    margin: 18px 0 8px;
    font-size: 18px;
    font-weight: 700;
    letter-spacing: -0.02em; }
.trust-card p {
    margin: 0;
    color: var(--ink-soft);
    font-size: 13.5px;
    line-height: 1.75; }
.trust-card p strong {
    color: var(--ink); }
.privacy-card {
    border-color: rgba(0, 180, 147, 0.2);
    background: linear-gradient(160deg, #f2fbf8, #ffffff 75%); }
.privacy-card .trust-icon {
    background: rgba(0, 180, 147, 0.13);
    color: var(--teal-deep); }
.optional-context {
    display: grid;
    gap: 18px;
    margin-top: 16px;
    padding: 28px;
    border: 1px solid rgba(49, 130, 246, 0.16);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.85); }
.optional-context h3 {
    margin: 0;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.02em; }
.optional-context p:last-child {
    margin: 0;
    color: var(--ink-soft);
    font-size: 13.5px;
    line-height: 1.8; }

/* ---------- advanced ---------- */
.advanced-section {
    padding: 64px 0;
    background: var(--paper); }
.advanced-card {
    display: grid;
    gap: 24px;
    padding: 34px;
    border-radius: var(--radius-lg);
    background:
        radial-gradient(60% 90% at 96% 0%, rgba(49, 130, 246, 0.22), transparent 60%),
        linear-gradient(130deg, #17233a, var(--night) 70%);
    box-shadow: var(--shadow-lift);
    color: #ffffff; }
.advanced-card h2 {
    font-size: clamp(26px, 6vw, 36px); }
.advanced-card > p {
    margin: 0;
    color: #9fabbf;
    font-size: 13.5px;
    line-height: 1.8; }

/* ---------- final ---------- */
.final-section {
    padding: 52px 0 96px;
    background: var(--paper); }
.final-card {
    padding: 44px 26px;
    border: 1px solid rgba(49, 130, 246, 0.14);
    border-radius: var(--radius-lg);
    background:
        radial-gradient(52% 60% at 88% 12%, rgba(49, 130, 246, 0.12), transparent 70%),
        linear-gradient(180deg, #f4f8ff, var(--cloud));
    text-align: center; }
.final-card > p:not(.eyebrow):not(.risk-line) {
    margin: 16px 0 26px;
    color: var(--ink-soft);
    font-size: 15px; }
.final-card .primary-action {
    min-width: min(100%, 240px); }
.risk-line {
    max-width: 780px;
    margin: 26px auto 0;
    color: var(--ink-faint);
    font-size: 11px;
    line-height: 1.7; }

/* ---------- footer ---------- */
.product-footer {
    padding: 48px 0 92px;
    border-top: 1px solid var(--line);
    background: var(--cloud);
    color: var(--ink); }
.footer-layout {
    display: grid;
    gap: 28px; }
.footer-layout > div > p {
    margin: 14px 0 0;
    color: var(--ink-faint);
    font-size: 13px; }
.footer-links {
    display: flex;
    gap: 10px 20px;
    flex-wrap: wrap; }
.footer-links a {
    color: var(--ink-soft);
    font-size: 13px;
    font-weight: 500;
    text-decoration: none;
    transition: color 160ms ease; }
.footer-links a:hover {
    color: var(--ink); }
.company-line {
    margin-top: 30px;
    padding-top: 24px;
    border-top: 1px solid var(--line);
    color: #9aa4b1;
    font-size: 11.5px;
    line-height: 1.7; }

/* ---------- mobile floating cta ---------- */
.mobile-start {
    position: fixed;
    right: 14px;
    bottom: 14px;
    left: 14px;
    z-index: 30; }
.mobile-start a {
    display: flex;
    min-height: 54px;
    align-items: center;
    justify-content: center;
    gap: 10px;
    border-radius: 16px;
    background: rgba(49, 130, 246, 0.96);
    box-shadow: 0 14px 34px rgba(49, 130, 246, 0.4);
    color: #ffffff;
    font-size: 15px;
    font-weight: 700;
    text-decoration: none;
    backdrop-filter: blur(12px); }
.mobile-start a:active {
    transform: scale(0.98); }