:root {
    --bg: #08121b;
    --bg-soft: #0f1b28;
    --panel: rgba(11, 23, 34, 0.84);
    --panel-strong: rgba(15, 29, 43, 0.96);
    --text: #e8f0f7;
    --muted: #b0c0cf;
    --accent: #73d7ff;
    --accent-2: #8cffc8;
    --border: rgba(255, 255, 255, 0.12);
    --shadow: 0 24px 60px rgba(0, 0, 0, 0.34);
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Hiragino Kaku Gothic ProN', 'Yu Gothic', 'Meiryo', sans-serif;
    background:
        radial-gradient(circle at top left, rgba(115, 215, 255, 0.12), transparent 28%),
        radial-gradient(circle at 80% 20%, rgba(140, 255, 200, 0.10), transparent 26%),
        linear-gradient(180deg, #09131d 0%, #0b1520 48%, #091018 100%);
    color: var(--text);
}

a {
    color: inherit;
}

img {
    max-width: 100%;
    display: block;
}

h1,
h2,
h3,
p,
ul {
    margin-top: 0;
}

h1,
h2,
h3 {
    line-height: 1.15;
    letter-spacing: 0.02em;
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    background: rgba(4, 10, 16, 0.72);
    border-bottom: 1px solid var(--border);
}

.topbar-inner {
    max-width: 1240px;
    margin: 0 auto;
    padding: 18px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.brand {
    font-size: 1.15rem;
    font-weight: 900;
    letter-spacing: 0.22em;
    text-decoration: none;
    background: linear-gradient(135deg, #ffffff 40%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.topnav {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    justify-content: flex-end;
}

.topnav a {
    color: var(--muted);
    text-decoration: none;
    font-size: 0.92rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    transition: color 0.3s ease;
    position: relative;
    padding: 4px 0;
}

.topnav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    transition: width 0.3s ease;
}

.topnav a:hover {
    color: var(--text);
}

.topnav a:hover::after {
    width: 100%;
}

.parallax-container {
    position: relative;
    width: 100%;
    min-height: 92vh;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-section {
    min-height: calc(100vh - 72px);
}

.parallax-window {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    transform: scale(1.03);
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(90deg, rgba(2, 12, 18, 0.90), rgba(2, 12, 18, 0.55), rgba(2, 12, 18, 0.85)),
        linear-gradient(180deg, rgba(2, 12, 18, 0.20), rgba(2, 12, 18, 0.98)),
        radial-gradient(circle at 18% 18%, rgba(115, 215, 255, 0.18), transparent 35%),
        radial-gradient(circle at 78% 20%, rgba(140, 255, 200, 0.12), transparent 30%);
}

.patent-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent-1);
    background: rgba(115, 215, 255, 0.1);
    border: 1px solid rgba(115, 215, 255, 0.35);
    padding: 3px 12px;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    vertical-align: middle;
    margin-left: 10px;
    box-shadow: 0 0 10px rgba(115, 215, 255, 0.15);
}

.hero-content {
    position: relative;
    z-index: 2;
    width: min(1120px, calc(100% - 48px));
    margin: 0 auto;
    padding: 100px 0 88px;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent-2);
    margin-bottom: 22px;
    border: 1px solid rgba(140, 255, 200, 0.2);
    padding: 6px 16px;
    border-radius: 99px;
    background: rgba(140, 255, 200, 0.04);
}

.hero-content h1 {
    font-size: clamp(2.6rem, 5vw, 5.5rem);
    font-weight: 900;
    letter-spacing: -0.01em;
    line-height: 1.15;
    margin: 0 0 22px;
    max-width: 14ch;
    background: linear-gradient(135deg, #ffffff 30%, #cceeff 70%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-lead {
    font-size: clamp(1.1rem, 2.2vw, 1.45rem);
    font-weight: 600;
    color: #edf7ff;
    line-height: 1.5;
    margin-bottom: 22px;
    max-width: 48rem;
}

.hero-copy {
    max-width: 58rem;
    color: var(--muted);
    line-height: 1.9;
    font-size: 1.05rem;
}

.hero-tagline {
    margin: 28px 0 0;
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--accent-2);
    letter-spacing: 0.05em;
    border-left: 3px solid var(--accent-2);
    padding-left: 12px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin: 36px 0 28px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 52px;
    padding: 0 28px;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 700;
    font-size: 0.98rem;
    letter-spacing: 0.05em;
    border: 1px solid transparent;
    transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

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

.button-primary {
    background: linear-gradient(135deg, var(--accent) 0%, #99e2ff 50%, var(--accent-2) 100%);
    color: #020e18;
    box-shadow: 0 0 24px rgba(115, 215, 255, 0.25);
}

.button-primary:hover {
    box-shadow: 0 0 32px rgba(115, 215, 255, 0.45);
}

.button-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text);
    border-color: rgba(255, 255, 255, 0.16);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.button-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--accent);
}

.button-ghost {
    background: transparent;
    color: var(--text);
    border-color: rgba(255, 255, 255, 0.16);
}

.button-ghost:hover {
    border-color: var(--accent-2);
    color: var(--accent-2);
}

.hero-points {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    list-style: none;
    padding: 0;
    margin: 0;
}

.hero-points li {
    padding: 10px 18px;
    border-radius: 999px;
    background: rgba(115, 215, 255, 0.06);
    border: 1px solid rgba(115, 215, 255, 0.12);
    color: #edf6fb;
    font-size: 0.94rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.section {
    position: relative;
    z-index: 1;
    width: min(1180px, calc(100% - 40px));
    margin: 0 auto;
    padding: 100px 0;
}

.section-heading {
    text-align: center;
    max-width: 920px;
    margin: 0 auto 36px;
}

.section-heading.narrow {
    max-width: 860px;
}

.section-heading h2 {
    font-size: clamp(1.9rem, 3.4vw, 3.4rem);
    margin: 0 0 18px;
    font-weight: 800;
    letter-spacing: -0.01em;
    background: linear-gradient(135deg, #ffffff 40%, rgba(255,255,255,0.7) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-heading p {
    color: var(--muted);
    line-height: 1.9;
    font-size: 1.05rem;
}

.grid {
    display: grid;
    gap: 20px;
}

.cards-2up,
.feature-grid,
.audience-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.features-4up,
.usecase-grid {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.problem-grid,
.feature-grid,
.audience-grid,
.usecase-grid,
.steps,
.comparison-grid {
    margin-top: 32px;
}

.info-card,
.feature-card,
.mini-card,
.step-card,
.comparison-card,
.audience-card,
.usecase-card,
.cta-panel {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 24px;
    box-shadow: var(--shadow);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.3s ease, box-shadow 0.3s ease;
}

.info-card:hover,
.feature-card:hover,
.step-card:hover,
.comparison-card:hover,
.audience-card:hover,
.usecase-card:hover {
    transform: translateY(-4px);
    border-color: rgba(115, 215, 255, 0.3);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.45), 0 0 24px rgba(115, 215, 255, 0.06);
}

.info-card,
.feature-card,
.audience-card,
.usecase-card {
    padding: 34px;
}

.accent {
    background: linear-gradient(180deg, rgba(115, 215, 255, 0.1), rgba(11, 23, 34, 0.94));
    border-color: rgba(115, 215, 255, 0.18);
}

.info-card h3,
.feature-card h3,
.audience-card h3,
.usecase-card h3,
.step-card h3,
.comparison-card h3 {
    margin-bottom: 18px;
    font-size: 1.35rem;
    font-weight: 800;
    color: #ffffff;
}

.info-card ul,
.feature-card ul,
.audience-card ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

.info-card li,
.feature-card li,
.audience-card li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 12px;
    color: var(--muted);
    line-height: 1.8;
    font-size: 0.98rem;
}

.info-card li::before,
.feature-card li::before,
.audience-card li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 9px;
    width: 6px;
    height: 6px;
    border-radius: 99px;
    background: var(--accent);
    box-shadow: 0 0 8px var(--accent);
}

.feature-card.highlight {
    background: linear-gradient(180deg, rgba(140, 255, 200, 0.1), rgba(11, 23, 34, 0.94));
    border-color: rgba(140, 255, 200, 0.18);
}

.small-note {
    color: var(--muted);
    font-size: 0.92rem;
    line-height: 1.8;
    background: rgba(255, 255, 255, 0.04);
    padding: 12px 16px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.mini-card {
    padding: 22px;
    border-radius: 20px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.04) 0%, rgba(255, 255, 255, 0.01) 100%);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text);
    display: flex;
    align-items: center;
    min-height: 88px;
    font-weight: 600;
    font-size: 0.96rem;
    transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.25s ease, background-color 0.25s ease;
}

.mini-card:hover {
    transform: translateY(-3px);
    border-color: rgba(140, 255, 200, 0.35);
    background: linear-gradient(135deg, rgba(140, 255, 200, 0.06) 0%, rgba(140, 255, 200, 0.01) 100%);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4), 0 0 20px rgba(140, 255, 200, 0.04);
}

.steps {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

.step-card {
    padding: 34px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(11, 23, 34, 0.94));
}

.step-card span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
    color: #020d18;
    font-weight: 900;
    font-size: 1.15rem;
    margin-bottom: 20px;
    box-shadow: 0 0 20px rgba(115, 215, 255, 0.25);
}

.step-card p,
.comparison-card p,
.usecase-card p {
    color: var(--muted);
    line-height: 1.9;
    margin-bottom: 0;
    font-size: 0.98rem;
}

.comparison-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

.comparison-card {
    padding: 22px;
    background: var(--panel-strong);
}

.comparison-card img-comparison-slider {
    margin: 18px 0 14px;
}

img-comparison-slider {
    --divider-width: 10px;
    --divider-color: #d5dde6;
    --default-handle-opacity: 1;
    visibility: hidden;
    width: 100%;
    border-radius: 18px;
    overflow: hidden;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

img-comparison-slider [slot='second'] {
    display: none;
}

img-comparison-slider.rendered {
    visibility: inherit;
}

img-comparison-slider.rendered [slot='second'] {
    display: unset;
}

.custom-animated-handle {
    transition: transform 0.2s;
}

.slider-with-animated-handle:hover .custom-animated-handle {
    transform: scale(1.15);
}

.card-list {
    position: relative;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 18px;
    width: 100%;
    margin: 0 auto;
}

.card {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(10, 19, 29, 0.92));
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    border-color: rgba(115, 215, 255, 0.35);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5), 0 0 24px rgba(115, 215, 255, 0.08);
}

.card a {
    display: block;
    padding: 34px 28px;
    text-decoration: none;
    color: var(--text);
}

.card h2 {
    margin: 0 0 12px;
    font-size: 1.35rem;
    font-weight: 800;
    color: #ffffff;
    transition: color 0.2s ease;
}

.card:hover h2 {
    color: var(--accent);
}

.card p {
    color: var(--muted);
    font-size: 0.94rem;
    line-height: 1.7;
    margin-bottom: 0;
}

.cta-panel {
    padding: 44px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    background: linear-gradient(135deg, rgba(115, 215, 255, 0.1) 0%, rgba(140, 255, 200, 0.08) 100%), var(--panel-strong);
    border-radius: 28px;
}

.cta-panel h2 {
    margin: 0 0 14px;
    font-size: clamp(1.5rem, 2.8vw, 2.4rem);
    font-weight: 800;
    line-height: 1.25;
}

.cta-panel p {
    margin: 0;
    color: var(--muted);
    line-height: 1.9;
}

.cta-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: flex-end;
}

footer {
    margin-top: 48px;
    border-top: 1px solid var(--border);
    background: rgba(4, 10, 16, 0.94);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.footer-inner {
    width: min(1180px, calc(100% - 40px));
    margin: 0 auto;
    padding: 48px 0 54px;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 32px;
}

.footer-inner strong {
    display: block;
    margin-bottom: 12px;
    letter-spacing: 0.05em;
    font-size: 1.05rem;
    color: #ffffff;
}

.footer-inner p {
    color: var(--muted);
    line-height: 1.8;
    margin: 0;
    font-size: 0.94rem;
}

.footer-inner a {
    color: var(--muted);
    text-decoration: none;
    line-height: 1.8;
    font-size: 0.94rem;
    transition: color 0.2s ease;
}

.footer-inner a:hover {
    color: var(--accent);
}

@media (max-width: 960px) {
    .topbar-inner,
    .cta-panel,
    .footer-inner {
        grid-template-columns: 1fr;
        flex-direction: column;
    }

    .hero-content {
        padding-top: 64px;
    }

    .cards-2up,
    .feature-grid,
    .audience-grid,
    .steps,
    .comparison-grid,
    .footer-inner {
        grid-template-columns: 1fr;
    }

    .topnav {
        justify-content: flex-start;
    }

    .section {
        width: min(1180px, calc(100% - 28px));
        padding: 72px 0;
    }
}

@media (max-width: 640px) {
    .topbar-inner {
        padding: 14px 16px;
    }

    .hero-content {
        width: min(100% - 32px, 1120px);
        padding-bottom: 56px;
    }

    .hero-actions,
    .cta-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .button {
        width: 100%;
    }

    .section {
        width: min(1180px, calc(100% - 24px));
        padding: 64px 0;
    }

    .info-card,
    .feature-card,
    .audience-card,
    .usecase-card,
    .step-card,
    .comparison-card,
    .cta-panel {
        padding: 20px;
        border-radius: 20px;
    }
}