:root {
    --bg-color: #ffffff;
    --bg-secondary: #f5f7fb;
    --text-main: #111111;
    --text-sub: #5f6472;
    --accent-color: #111111;
    --brand-blue: #2563eb;
    --brand-cyan: #0ea5e9;
    --brand-green: #10b981;
    --border-color: #e5e7eb;
    --shadow-soft: 0 24px 60px rgba(15, 23, 42, 0.08);
    --shadow-card: 0 16px 40px rgba(37, 99, 235, 0.12);
    --container-width: 1120px;
    --font-stack: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg-color);
    color: var(--text-main);
    font-family: var(--font-stack);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, strong {
    line-height: 1.2;
    letter-spacing: -0.03em;
}

p {
    color: var(--text-sub);
    margin-bottom: 1rem;
}

a {
    color: inherit;
    text-decoration: none;
    transition: 0.2s ease;
}

ul {
    list-style: none;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    z-index: 1000;
    transition: 0.3s ease;
}

header.scrolled {
    border-bottom-color: var(--border-color);
}

.nav-inner {
    height: 72px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.2rem;
    font-weight: 800;
}

.logo-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--brand-blue), var(--brand-cyan));
}

.nav-links {
    display: flex;
    gap: 32px;
    font-size: 0.95rem;
    font-weight: 500;
}

.nav-links a:hover {
    color: var(--brand-blue);
}

.lang-btn {
    padding: 7px 14px;
    border: 1px solid var(--border-color);
    border-radius: 999px;
    background: #ffffff;
    cursor: pointer;
    font-size: 0.8rem;
}

.hero {
    padding: 154px 0 88px;
    background: radial-gradient(circle at top left, rgba(37, 99, 235, 0.16), transparent 34%), radial-gradient(circle at bottom right, rgba(14, 165, 233, 0.14), transparent 28%), linear-gradient(180deg, #f8fbff 0%, #ffffff 62%);
}

.hero-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 40px;
    align-items: center;
}

.hero-copy h1 {
    font-size: clamp(3rem, 5vw, 4.7rem);
    margin-bottom: 24px;
}

.hero-copy p {
    max-width: 640px;
    font-size: clamp(1.06rem, 1.8vw, 1.28rem);
    margin-bottom: 36px;
}

.btn-group {
    display: flex;
    gap: 14px;
    align-items: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 26px;
    border-radius: 999px;
    font-size: 0.98rem;
    font-weight: 700;
    border: 1px solid transparent;
}

.btn-primary {
    background: var(--accent-color);
    color: #ffffff;
    box-shadow: 0 12px 24px rgba(17, 17, 17, 0.14);
}

.btn-primary:hover {
    transform: translateY(-2px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.8);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--text-main);
}

.btn-voice {
    gap: 12px;
    background: rgba(255, 255, 255, 0.88);
    border-color: var(--border-color);
    color: var(--text-main);
    cursor: pointer;
}

.btn-voice:hover {
    border-color: var(--text-main);
    transform: translateY(-2px);
}

.btn-voice.playing {
    background: var(--accent-color);
    color: #ffffff;
    border-color: var(--accent-color);
    box-shadow: 0 12px 24px rgba(17, 17, 17, 0.14);
}

.waveform {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    height: 18px;
}

.waveform-bar {
    display: block;
    width: 3px;
    height: 8px;
    border-radius: 999px;
    background: currentColor;
    opacity: 0.7;
}

.btn-voice.playing .waveform-bar {
    animation: waveform-bounce 0.9s ease-in-out infinite;
    opacity: 1;
}

.waveform-bar:nth-child(1) {
    height: 8px;
    animation-delay: 0s;
}

.waveform-bar:nth-child(2) {
    height: 14px;
    animation-delay: 0.1s;
}

.waveform-bar:nth-child(3) {
    height: 18px;
    animation-delay: 0.2s;
}

.waveform-bar:nth-child(4) {
    height: 12px;
    animation-delay: 0.3s;
}

.waveform-bar:nth-child(5) {
    height: 9px;
    animation-delay: 0.4s;
}

@keyframes waveform-bounce {
    0%, 100% {
        transform: scaleY(0.55);
    }
    50% {
        transform: scaleY(1.05);
    }
}

.hero-panel {
    padding: 24px;
    border: 1px solid rgba(37, 99, 235, 0.12);
    border-radius: 28px;
    background: rgba(255, 255, 255, 0.9);
    box-shadow: var(--shadow-soft);
}

.hero-panel-header,
.hero-kpis,
.dashboard-card-header,
.dashboard-micro-grid,
.visual-chip-row,
.caller-row,
.platform-tags,
.impact-board-header,
.impact-step,
.impact-summary {
    display: flex;
}

.hero-panel-header {
    justify-content: space-between;
    align-items: center;
    margin-bottom: 18px;
}

.panel-pill,
.impact-badge,
.visual-chip,
.caller-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.panel-pill {
    padding: 7px 10px;
    background: #dbeafe;
    color: var(--brand-blue);
}

.panel-status {
    font-size: 0.82rem;
    color: var(--text-sub);
}

.hero-kpis {
    gap: 14px;
    margin-bottom: 18px;
}

.hero-kpi {
    flex: 1;
    padding: 16px;
    border-radius: 18px;
    background: linear-gradient(180deg, #ffffff 0%, #f3f7ff 100%);
    border: 1px solid #e7eefb;
}

.hero-kpi strong,
.dashboard-micro-grid strong,
.impact-metrics strong {
    display: block;
    font-size: 1.5rem;
    margin-bottom: 6px;
}

.hero-kpi span,
.dashboard-micro-grid span,
.impact-metrics span,
.impact-summary span {
    color: var(--text-sub);
    font-size: 0.84rem;
}

.hero-flow {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 16px;
    align-items: stretch;
}

.flow-card {
    padding: 18px;
    border-radius: 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
}

.flow-card.accent {
    background: linear-gradient(180deg, #effcf9 0%, #ffffff 100%);
    border-color: rgba(16, 185, 129, 0.24);
}

.flow-label {
    display: inline-block;
    font-size: 0.76rem;
    color: var(--brand-blue);
    font-weight: 700;
    margin-bottom: 10px;
    text-transform: uppercase;
}

.flow-card strong {
    display: block;
    margin-top: 2px;
    line-height: 1.35;
}

.flow-card p {
    margin: 10px 0 0;
    font-size: 0.9rem;
}

.flow-divider {
    width: 1px;
    background: linear-gradient(180deg, transparent, #cbd5e1, transparent);
}

.market-stats {
    padding: 56px 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    text-align: center;
}

.stat-item {
    padding: 10px 8px;
}

.stat-item h3 {
    font-size: 2.25rem;
    margin-bottom: 10px;
}

.stat-item h3 span {
    font-size: 1rem;
    color: var(--text-sub);
    margin-left: 4px;
}

.stat-item p {
    font-size: 0.92rem;
    margin: 0;
}

section {
    padding: 100px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 76px;
}

.section-title-left {
    text-align: left;
    margin-bottom: 30px;
}

.section-title span,
.tech-tagline {
    display: inline-block;
    margin-bottom: 12px;
    color: var(--brand-blue);
    font-size: 0.82rem;
    font-weight: 800;
    letter-spacing: 0.07em;
    text-transform: uppercase;
}

.section-title h2 {
    font-size: clamp(2.2rem, 4vw, 3rem);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-bottom: 72px;
}

.tech-card {
    padding: 30px;
    border-radius: 18px;
    background: #ffffff;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 30px rgba(17, 24, 39, 0.04);
}

.tech-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    border-radius: 14px;
    margin-bottom: 18px;
    background: #eaf2ff;
    color: var(--brand-blue);
    font-size: 1.1rem;
    font-weight: 800;
}

.tech-card h3 {
    font-size: 1.18rem;
    margin-bottom: 12px;
}

.tech-card p {
    font-size: 0.95rem;
    margin: 0;
}

.tech-deep-dive,
.vision-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 44px;
    align-items: stretch;
}

.tech-summary,
.vision-copy {
    font-size: 1.08rem;
    line-height: 1.75;
}

.comparison-list {
    display: flex;
    gap: 18px;
    margin-top: 26px;
}

.cmp-item {
    flex: 1;
    padding: 18px;
    border-radius: 18px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    text-align: center;
}

.cmp-icon {
    width: 40px;
    height: 40px;
    margin: 0 auto 12px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #dbeafe;
    color: var(--brand-blue);
    font-weight: 800;
}

.cmp-content strong {
    display: block;
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.cmp-content span {
    color: var(--text-sub);
    font-size: 0.85rem;
}

.tech-security,
.impact-board {
    padding: 28px;
    border-radius: 24px;
    background: #ffffff;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-soft);
}

.impact-card {
    background: linear-gradient(180deg, #ffffff 0%, #f7fbff 100%);
}

.tech-security h4 {
    margin-bottom: 14px;
    font-size: 1.24rem;
}

.impact-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 22px;
}

.impact-metrics > div {
    padding: 16px;
    border-radius: 16px;
    background: #f8fafc;
}

.service-section {
    background: linear-gradient(180deg, var(--bg-secondary) 0%, #ffffff 100%);
}

.service-list {
    display: grid;
    gap: 28px;
}

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

.service-item {
    display: flex;
    flex-direction: column;
    border-radius: 24px;
    overflow: hidden;
    background: #ffffff;
    border: 1px solid var(--border-color);
    box-shadow: 0 16px 40px rgba(15, 23, 42, 0.05);
}

.service-image {
    min-height: 300px;
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
}

.service-text {
    padding: 28px;
}

.service-text .tag {
    display: inline-block;
    padding: 5px 10px;
    border-radius: 999px;
    background: #ebf3ff;
    color: var(--brand-blue);
    font-size: 0.73rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    margin-bottom: 16px;
}

.service-text .dualcall-tag {
    background: #ecfdf5;
    color: var(--brand-green);
}

.service-text h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.service-text p {
    font-size: 0.98rem;
    margin-bottom: 18px;
}

.service-points li {
    position: relative;
    padding-left: 18px;
    margin-bottom: 10px;
    color: var(--text-sub);
    font-size: 0.92rem;
}

.service-points li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--brand-blue);
}

.smartbound-visual {
    background: linear-gradient(180deg, #f3f8ff 0%, #ffffff 100%);
}

.visual-chip-row {
    gap: 8px;
    margin-bottom: 18px;
}

.visual-chip {
    padding: 6px 10px;
    background: rgba(37, 99, 235, 0.08);
    color: var(--brand-blue);
}

.visual-chip.active {
    background: var(--brand-blue);
    color: #ffffff;
}

.dashboard-card {
    padding: 20px;
    border-radius: 22px;
    background: #ffffff;
    border: 1px solid rgba(37, 99, 235, 0.14);
    box-shadow: var(--shadow-card);
}

.dashboard-card-header {
    justify-content: space-between;
    align-items: baseline;
    gap: 12px;
    margin-bottom: 18px;
}

.dashboard-card-header span {
    font-size: 0.78rem;
    color: var(--text-sub);
}

.dashboard-bars {
    display: grid;
    gap: 14px;
    margin-bottom: 18px;
}

.bar-group {
    display: grid;
    grid-template-columns: 62px 1fr;
    gap: 10px;
    align-items: center;
}

.bar-group span {
    font-size: 0.8rem;
    color: var(--text-sub);
}

.bar {
    height: 10px;
    border-radius: 999px;
    overflow: hidden;
    background: #e8eef9;
}

.bar i {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--brand-blue), var(--brand-cyan));
}

.dashboard-micro-grid {
    gap: 12px;
}

.dashboard-micro-grid > div {
    flex: 1;
    padding: 14px;
    border-radius: 16px;
    background: #f8fafc;
}

.dualcall-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(180deg, #f2fcf7 0%, #ffffff 100%);
}

.phone-shell {
    width: min(100%, 290px);
    padding: 16px;
    border-radius: 28px;
    background: #101828;
    color: #ffffff;
    box-shadow: 0 24px 48px rgba(16, 24, 40, 0.18);
}

.phone-status {
    width: 92px;
    height: 6px;
    margin: 2px auto 14px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.22);
}

.caller-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 14px;
}

.caller-badge {
    padding: 5px 10px;
    background: rgba(16, 185, 129, 0.2);
    color: #86efac;
}

.memo-card {
    padding: 16px;
    border-radius: 18px;
    background: #f8fafc;
    color: #0f172a;
}

.memo-card p {
    color: #0f172a;
    font-weight: 700;
    font-size: 0.94rem;
    margin-bottom: 10px;
}

.memo-card ul li {
    position: relative;
    padding-left: 14px;
    margin-bottom: 8px;
    color: #475569;
    font-size: 0.82rem;
}

.memo-card ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 9px;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--brand-green);
}

.platform-tags {
    gap: 8px;
    margin-top: 14px;
    flex-wrap: wrap;
}

.platform-tags span {
    padding: 6px 10px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    color: #cbd5e1;
    font-size: 0.75rem;
}

.impact-board-header {
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-bottom: 18px;
}

.impact-badge {
    padding: 6px 10px;
    background: #e0f2fe;
    color: #0369a1;
}

.impact-steps {
    display: grid;
    gap: 14px;
    margin-bottom: 20px;
}

.impact-step {
    gap: 16px;
    align-items: flex-start;
    padding: 16px;
    border-radius: 18px;
    background: #f8fafc;
}

.impact-step > span {
    min-width: 38px;
    height: 38px;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: #dbeafe;
    color: var(--brand-blue);
    font-weight: 800;
}

.impact-step p {
    margin: 6px 0 0;
    font-size: 0.9rem;
}

.impact-summary {
    gap: 14px;
}

.impact-summary > div {
    flex: 1;
    padding: 16px;
    border-radius: 18px;
    background: linear-gradient(180deg, #ffffff 0%, #f4f7fb 100%);
    border: 1px solid var(--border-color);
}

.impact-summary strong {
    display: block;
    margin-bottom: 6px;
}

footer {
    padding: 80px 0 40px;
    border-top: 1px solid var(--border-color);
    font-size: 0.92rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 34px;
    margin-bottom: 48px;
}

.footer-col h4 {
    margin-bottom: 16px;
    font-size: 1rem;
}

.footer-col li {
    margin-bottom: 10px;
    color: var(--text-sub);
}

.footer-col a:hover {
    color: var(--text-main);
}

.copyright {
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: #94a3b8;
}

.modal-backdrop {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: rgba(15, 23, 42, 0.42);
    backdrop-filter: blur(8px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: 0.2s ease;
    z-index: 2000;
}

.modal-backdrop.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.modal-dialog {
    position: relative;
    width: min(100%, 640px);
    padding: 32px;
    border-radius: 28px;
    background: #ffffff;
    box-shadow: 0 30px 80px rgba(15, 23, 42, 0.18);
}

.modal-close {
    position: absolute;
    top: 18px;
    right: 18px;
    width: 40px;
    height: 40px;
    border: 0;
    border-radius: 50%;
    background: #f1f5f9;
    color: var(--text-main);
    font-size: 1.5rem;
    cursor: pointer;
}

.modal-copy {
    margin-bottom: 24px;
}

.modal-eyebrow {
    display: inline-block;
    margin-bottom: 10px;
    color: var(--brand-blue);
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 0.06em;
}

.modal-copy h3 {
    font-size: 2rem;
    margin-bottom: 10px;
}

.signup-form {
    display: grid;
    gap: 20px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.form-field {
    display: grid;
    gap: 8px;
    font-size: 0.92rem;
    color: var(--text-main);
    font-weight: 600;
}

.form-field input {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--border-color);
    border-radius: 14px;
    font: inherit;
    color: var(--text-main);
    background: #ffffff;
}

.form-field input:focus {
    outline: none;
    border-color: var(--brand-blue);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

.modal-submit {
    width: 100%;
}

@media (max-width: 1024px) {
    .container {
        padding: 0 20px;
    }

    .hero-layout,
    .tech-deep-dive,
    .vision-grid,
    .service-list-dual {
        grid-template-columns: 1fr;
    }

    .hero-copy {
        text-align: center;
    }

    .hero-copy p {
        margin-left: auto;
        margin-right: auto;
    }

    .btn-group {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero {
        padding: 132px 0 60px;
    }

    .hero-copy h1 {
        font-size: 2.3rem;
        line-height: 1.25;
        word-break: keep-all;
    }

    .hero-copy p,
    .vision-copy,
    .tech-summary,
    .service-text p,
    .tech-card p,
    .stat-item p,
    .impact-step p {
        word-break: keep-all;
    }

    .btn-group,
    .hero-kpis,
    .dashboard-micro-grid,
    .comparison-list,
    .impact-summary {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .hero-flow,
    .stats-grid,
    .tech-grid,
    .impact-metrics,
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .flow-divider {
        width: 100%;
        height: 1px;
    }

    section {
        padding: 68px 0;
    }

    .section-title {
        margin-bottom: 50px;
    }

    .section-title h2 {
        font-size: 2rem;
        word-break: keep-all;
    }

    .impact-step {
        flex-direction: column;
    }

    .modal-dialog {
        padding: 24px 20px;
    }

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

    .service-image {
        min-height: auto;
    }

    .bar-group {
        grid-template-columns: 52px 1fr;
    }
}