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

:root {
    --white: #ffffff;
    --bg-warm: #fbfbfa;
    --text: #1a1a1a;
    --text2: #555555;
    --text3: #999999;
    --border: rgba(0,0,0,0.07);
    --blue: #2383e2;
    --green: #0f7b3f;
    --accent: #37352f;
    --r: 14px;
}

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
    font-family: 'Noto Sans SC', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text);
    background: var(--white);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

.w { max-width: 1060px; margin: 0 auto; padding: 0 48px; }

/* ===== Nav ===== */
.nav {
    position: sticky; top: 0; z-index: 100;
    background: rgba(255,255,255,0.88);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
}

.nav .w {
    height: 54px;
    display: flex; align-items: center; justify-content: space-between;
}

.logo {
    display: flex; align-items: center; gap: 9px;
    font-size: 15px; font-weight: 700;
    color: var(--text); text-decoration: none;
    letter-spacing: 0.02em;
}

.logo-mark {
    display: inline-flex; align-items: center; justify-content: center;
    width: 30px; height: 30px;
    background: var(--text); color: var(--white);
    font-size: 14px; font-weight: 700;
    border-radius: 8px;
}

.logo-mark.sm { width: 24px; height: 24px; font-size: 11px; border-radius: 6px; }

.nav-links { display: flex; gap: 28px; }

.nav-links a {
    font-size: 13.5px; font-weight: 400;
    color: var(--text2); text-decoration: none;
    transition: color 0.15s ease;
}
.nav-links a:hover { color: var(--text); }

/* ===== Hero ===== */
.hero { padding: 100px 0 20px; }

.hero-card {
    background: none;
    border: none;
    border-radius: 0;
    padding: 0;
    text-align: left;
    max-width: 640px;
}

.pill {
    display: inline-block;
    padding: 5px 14px;
    font-size: 12.5px; font-weight: 500;
    color: var(--text2);
    background: var(--bg-warm);
    border: 1px solid var(--border);
    border-radius: 20px;
    margin-bottom: 28px;
    letter-spacing: 0.01em;
}

.hero-card h1 {
    font-size: 52px; font-weight: 700;
    line-height: 1.18; letter-spacing: -0.03em;
    margin-bottom: 24px;
    color: var(--accent);
}

.hero-card p {
    font-size: 17px; color: var(--text2);
    line-height: 1.85;
    max-width: 540px;
}

/* ===== Sections ===== */
.section { padding: 80px 0 0; }

.sec-title {
    font-size: 13px; font-weight: 600;
    color: var(--text3);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 32px;
}

/* Two col */
.two-col {
    display: grid; grid-template-columns: 1fr 1fr; gap: 48px;
}

.col-card {
    background: none;
    border: none;
    border-radius: 0;
    padding: 0;
}

.col-card h3 {
    font-size: 16px; font-weight: 600;
    margin-bottom: 14px;
    color: var(--text);
}

.col-card p {
    font-size: 14.5px; color: var(--text2);
    line-height: 1.9;
    margin-bottom: 10px;
}
.col-card p:last-child { margin-bottom: 0; }

/* ===== Product ===== */
.section.alt { background: none; }

.product-card {
    background: var(--bg-warm);
    border: 1px solid var(--border);
    border-radius: var(--r);
    padding: 44px 40px;
}

.product-main { margin-bottom: 32px; }

.product-main h3 {
    font-size: 19px; font-weight: 700;
    margin-bottom: 14px;
    color: var(--accent);
}

.product-main p {
    font-size: 14.5px; color: var(--text2);
    line-height: 1.9; max-width: 580px;
    margin-bottom: 18px;
}

.status-line {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: 13px; font-weight: 500; color: var(--green);
}

.status-dot {
    width: 7px; height: 7px; border-radius: 50%;
    background: var(--green);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%,100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.product-features {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 10px;
    border-top: 1px solid rgba(0,0,0,0.05);
    padding-top: 24px;
}

.feat {
    display: flex; gap: 12px; align-items: flex-start;
    padding: 14px 16px;
    border-radius: 10px;
    background: var(--white);
    border: 1px solid var(--border);
    transition: box-shadow 0.2s ease;
}

.feat:hover {
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.feat-icon {
    width: 30px; height: 30px; flex-shrink: 0;
    display: flex; align-items: center; justify-content: center;
    color: var(--text3);
}

.feat strong {
    display: block; font-size: 13.5px; font-weight: 600;
    margin-bottom: 3px;
    color: var(--text);
}

.feat p {
    font-size: 12.5px; color: var(--text3); line-height: 1.6;
    margin: 0;
}

/* ===== Contact ===== */
.contact-card {
    background: none;
    border: none;
    padding: 0;
}

.contact-card > p {
    font-size: 14.5px; color: var(--text2);
    line-height: 1.85;
    margin-bottom: 28px;
}

.contact-grid {
    display: flex; gap: 56px;
}

.contact-item {
    display: flex; flex-direction: column; gap: 6px;
}

.contact-label {
    font-size: 12px; font-weight: 600; color: var(--text3);
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.contact-item a, .contact-item span {
    font-size: 14.5px; color: var(--text);
    text-decoration: none;
}

.contact-item a:hover { color: var(--blue); }

/* ===== Footer ===== */
.footer {
    margin-top: 100px;
    border-top: 1px solid var(--border);
    padding: 28px 0 32px;
    background: var(--bg-warm);
}

.footer-top {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 20px;
}

.footer-brand {
    display: flex; align-items: center; gap: 10px;
}

.footer-brand strong {
    font-size: 13px; display: block; color: var(--text);
}

.footer-brand p {
    font-size: 12px; color: var(--text3); margin: 2px 0 0;
}

.footer-nav {
    display: flex; gap: 20px;
}

.footer-nav a {
    font-size: 12.5px; color: var(--text3);
    text-decoration: none;
    transition: color 0.15s ease;
}
.footer-nav a:hover { color: var(--text2); }

.footer-bottom {
    display: flex; justify-content: space-between; align-items: center;
    padding-top: 16px;
    border-top: 1px solid var(--border);
    font-size: 11.5px; color: var(--text3);
}

.footer-icp a {
    color: var(--text3); text-decoration: none;
}
.footer-icp a:hover { color: var(--text2); }

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .w { padding: 0 24px; }
    .nav-links { gap: 20px; }
    .nav-links a { font-size: 13px; }
    .hero { padding: 64px 0 12px; }
    .hero-card h1 { font-size: 36px; }
    .hero-card p { font-size: 15px; }
    .section { padding: 56px 0 0; }
    .two-col { grid-template-columns: 1fr; gap: 32px; }
    .product-card { padding: 28px 24px; }
    .product-features { grid-template-columns: 1fr; }
    .contact-grid { flex-direction: column; gap: 20px; }
    .footer { margin-top: 64px; }
    .footer-top { flex-direction: column; gap: 16px; align-items: flex-start; }
    .footer-nav { flex-wrap: wrap; gap: 14px; }
    .footer-bottom { flex-direction: column; gap: 8px; }
}

@media (max-width: 480px) {
    .hero-card h1 { font-size: 30px; }
    .nav-links { display: none; }
    .sec-title { font-size: 12px; }
}

/* ===== Animation ===== */
.fade-up {
    opacity: 0; transform: translateY(12px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}
.fade-up.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
    .fade-up { opacity: 1; transform: none; }
    html { scroll-behavior: auto; }
    .status-dot { animation: none; }
}