:root {
    --brand: #dc3545;
    --brand-dark: #b82331;
    --brand-soft: #fff0f2;
    --ink: #17191f;
    --muted: #687181;
    --surface: #ffffff;
    --soft: #f6f7fa;
    --line: #e6e9ef;
    --success: #168a54;
    --shadow: 0 22px 64px rgba(23, 25, 31, 0.09);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--ink);
    background: var(--surface);
    font-family:
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        "PingFang SC",
        "Microsoft YaHei",
        sans-serif;
}

a {
    color: inherit;
}

.site-nav {
    position: sticky;
    top: 0;
    z-index: 30;
    border-bottom: 1px solid rgba(230, 233, 239, 0.92);
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(16px);
}

.nav-inner {
    max-width: 1180px;
    margin: 0 auto;
    padding: 15px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 850;
    text-decoration: none;
    letter-spacing: -0.45px;
}

.brand-mark {
    width: 32px;
    height: 32px;
    border-radius: 10px;
    display: grid;
    place-items: center;
    color: #fff;
    background: var(--brand);
    box-shadow: 0 8px 20px rgba(220, 53, 69, 0.24);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 22px;
}

.nav-links a {
    color: #4d5665;
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
}

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

.nav-actions {
    display: flex;
    gap: 10px;
}

.button {
    min-height: 44px;
    padding: 0 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid transparent;
    border-radius: 11px;
    font-weight: 800;
    text-decoration: none;
    cursor: pointer;
    transition: 0.16s ease;
}

.button:hover {
    transform: translateY(-1px);
}

.button-primary {
    color: #fff;
    background: var(--brand);
    box-shadow: 0 10px 24px rgba(220, 53, 69, 0.2);
}

.button-primary:hover {
    background: var(--brand-dark);
}

.button-secondary {
    border-color: var(--line);
    background: #fff;
}

.button-ghost {
    color: var(--brand);
    background: var(--brand-soft);
}

.hero {
    padding: 88px 24px 76px;
    overflow: hidden;
    background:
        radial-gradient(
            circle at 82% 18%,
            rgba(220, 53, 69, 0.15),
            transparent 32%
        ),
        linear-gradient(180deg, #fff, #fbfbfc);
}

.hero-inner {
    max-width: 1180px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.08fr 0.92fr;
    gap: 58px;
    align-items: center;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 999px;
    color: var(--brand);
    background: var(--brand-soft);
    font-size: 13px;
    font-weight: 850;
}

.pulse {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
    box-shadow: 0 0 0 5px rgba(22, 138, 84, 0.12);
}

.hero h1 {
    margin: 22px 0 18px;
    font-size: clamp(42px, 6vw, 70px);
    line-height: 1.02;
    letter-spacing: -2.4px;
}

.hero-copy {
    max-width: 680px;
    color: var(--muted);
    font-size: 18px;
    line-height: 1.85;
}

.hero-actions {
    margin-top: 30px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.trust-row {
    margin-top: 28px;
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    color: var(--muted);
    font-size: 14px;
}

.check {
    color: var(--success);
    font-weight: 900;
}

.monitor-window {
    border: 1px solid var(--line);
    border-radius: 24px;
    overflow: hidden;
    background: #fff;
    box-shadow: var(--shadow);
}

.window-bar {
    padding: 15px 18px;
    display: flex;
    justify-content: space-between;
    border-bottom: 1px solid var(--line);
    background: #fbfbfc;
}

.live-state {
    color: var(--success);
    font-size: 13px;
    font-weight: 850;
}

.monitor-body {
    padding: 20px;
}

.monitor-task {
    padding: 16px;
    border: 1px solid var(--line);
    border-radius: 14px;
}

.monitor-task + .monitor-task {
    margin-top: 12px;
}

.task-head {
    display: flex;
    justify-content: space-between;
    gap: 14px;
}

.task-name {
    font-weight: 850;
}

.task-badge {
    padding: 5px 9px;
    border-radius: 999px;
    color: var(--success);
    background: #eaf8f1;
    font-size: 12px;
    font-weight: 850;
}

.task-meta {
    margin-top: 9px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px 16px;
    color: var(--muted);
    font-size: 13px;
}

.notification-preview {
    margin-top: 14px;
    padding: 15px;
    display: grid;
    grid-template-columns: 54px 1fr;
    gap: 13px;
    border-radius: 14px;
    color: #fff;
    background: #20242d;
}

.preview-image {
    width: 54px;
    height: 54px;
    border-radius: 10px;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, #596273, #303642);
    font-weight: 900;
}

.notification-preview small {
    color: #b7bdc8;
}

.section {
    padding: 78px 24px;
}

.section-soft {
    background: var(--soft);
}

.section-inner {
    max-width: 1180px;
    margin: 0 auto;
}

.section-heading {
    max-width: 730px;
    margin-bottom: 34px;
}

.section-heading.center {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.section-heading h2 {
    margin: 0 0 13px;
    font-size: clamp(30px, 4vw, 48px);
    letter-spacing: -1.4px;
}

.section-heading p {
    margin: 0;
    color: var(--muted);
    line-height: 1.8;
}

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

.feature-card,
.price-card,
.info-card,
.step {
    border: 1px solid var(--line);
    border-radius: 18px;
    background: #fff;
}

.feature-card {
    padding: 24px;
}

.feature-icon {
    width: 46px;
    height: 46px;
    margin-bottom: 18px;
    display: grid;
    place-items: center;
    border-radius: 14px;
    color: var(--brand);
    background: var(--brand-soft);
    font-weight: 900;
}

.feature-card h3,
.step h3 {
    margin: 0 0 10px;
}

.feature-card p,
.step p,
.info-card p {
    margin: 0;
    color: var(--muted);
    line-height: 1.75;
}

.steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
}

.step {
    padding: 24px;
}

.step-number {
    width: 34px;
    height: 34px;
    margin-bottom: 16px;
    display: grid;
    place-items: center;
    border-radius: 10px;
    color: #fff;
    background: var(--brand);
    font-weight: 900;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
}

.price-card {
    position: relative;
    padding: 24px;
}

.price-card.featured {
    border-color: var(--brand);
    box-shadow: 0 18px 48px rgba(220, 53, 69, 0.12);
}

.recommended {
    position: absolute;
    top: 15px;
    right: 15px;
    padding: 5px 8px;
    border-radius: 999px;
    color: #fff;
    background: var(--brand);
    font-size: 11px;
    font-weight: 850;
}

.plan-name {
    font-size: 20px;
    font-weight: 850;
}

.plan-price {
    margin: 18px 0;
    font-size: 34px;
    font-weight: 900;
}

.plan-price small {
    color: var(--muted);
    font-size: 14px;
}

.plan-list {
    min-height: 126px;
    padding-left: 20px;
    color: var(--muted);
    line-height: 1.9;
}

.faq {
    border-top: 1px solid var(--line);
}

.faq-item {
    padding: 22px 0;
    border-bottom: 1px solid var(--line);
}

.faq-item h3 {
    margin: 0 0 8px;
    font-size: 18px;
}

.faq-item p {
    margin: 0;
    color: var(--muted);
    line-height: 1.75;
}

.cta {
    padding: 34px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    border-radius: 24px;
    color: #fff;
    background: linear-gradient(135deg, #dc3545, #a91f2c);
    box-shadow: 0 22px 60px rgba(220, 53, 69, 0.22);
}

.cta h2 {
    margin: 0 0 8px;
}

.cta p {
    margin: 0;
    color: rgba(255, 255, 255, 0.82);
}

.content-page {
    min-height: 70vh;
    padding: 72px 24px;
}

.content-inner {
    max-width: 900px;
    margin: 0 auto;
}

.content-inner.wide {
    max-width: 1180px;
}

.content-inner h1 {
    margin: 18px 0 16px;
    font-size: clamp(38px, 5vw, 58px);
    letter-spacing: -1.8px;
}

.content-inner h2 {
    margin-top: 34px;
}

.content-inner p,
.content-inner li {
    color: var(--muted);
    line-height: 1.85;
}

.info-card {
    padding: 24px;
}

.timeline {
    border-left: 2px solid var(--line);
    padding-left: 24px;
}

.timeline-item {
    position: relative;
    margin-bottom: 28px;
}

.timeline-item::before {
    content: "";
    position: absolute;
    left: -31px;
    top: 7px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--brand);
}

.timeline-item h3 {
    margin: 0 0 8px;
}

.site-footer {
    border-top: 1px solid var(--line);
    padding: 34px 24px;
    color: var(--muted);
}

.footer-inner {
    max-width: 1180px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
}

.footer-links {
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
}

.footer-links a {
    text-decoration: none;
}

@media (max-width: 920px) {
    .nav-links {
        display: none;
    }

    .hero-inner {
        grid-template-columns: 1fr;
    }

    .grid-3,
    .pricing-grid {
        grid-template-columns: 1fr 1fr;
    }

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

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

    .nav-actions .button-secondary {
        display: none;
    }

    .hero {
        padding: 62px 18px 54px;
    }

    .hero h1 {
        letter-spacing: -1.5px;
    }

    .section,
    .content-page {
        padding: 56px 18px;
    }

    .grid-3,
    .pricing-grid,
    .steps {
        grid-template-columns: 1fr;
    }

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