:root {
    --bg: #edf2f5;
    --paper: #ffffff;
    --ink: #1b2328;
    --muted: #61707c;
    --line: #d4dce2;
    --brand: #0a7d77;
    --brand-dark: #07635e;
    --alt: #0f172a;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    color: var(--ink);
    background: linear-gradient(180deg, #f4f8fa 0%, var(--bg) 30%, #eef3f5 100%);
}

a { color: inherit; text-decoration: none; }

.container {
    width: min(1240px, 94%);
    margin: 0 auto;
}

.site-header {
    border-bottom: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.95);
    position: sticky;
    top: 0;
    z-index: 50;
}

.nav-main {
    min-height: 72px;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo {
    font-size: 1.38rem;
    font-weight: 900;
    letter-spacing: 0.4px;
}

.logo span {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--muted);
}

.main-nav {
    margin-left: auto;
    display: flex;
    gap: 0.55rem;
    align-items: center;
}

.main-nav > a,
.menu-parent {
    color: #40505c;
    font-weight: 600;
    padding: 0.52rem 0.75rem;
    border-radius: 8px;
}

.main-nav > a:hover,
.menu-parent:hover {
    color: #0284c7;
    background: #f3f7fb;
}

.menu-parent.active {
    color: #0284c7;
    background: #eef7ff;
}

.menu-group {
    position: relative;
}

.menu-parent::after {
    content: "  \25BE";
    font-size: 0.72rem;
}

.sub-menu {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    min-width: 220px;
    display: none;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 10px;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
    padding: 0.4rem;
}

.sub-menu a {
    display: block;
    border-radius: 8px;
    padding: 0.58rem 0.62rem;
    font-weight: 600;
}

.sub-menu a:hover {
    background: #f1f5f9;
}

.menu-group:hover .sub-menu {
    display: block;
}

.menu-mega .mega-menu {
    min-width: 460px;
    padding: 0.5rem;
}

.mega-item {
    border: 1px solid #e2e8f0;
    background: #fff;
    margin-bottom: 0.4rem;
}

.mega-item:last-child {
    margin-bottom: 0;
}

.mega-item strong {
    display: block;
    color: #334155;
    margin-bottom: 0.22rem;
}

.mega-item span {
    display: block;
    color: #64748b;
    font-size: 0.9rem;
    line-height: 1.3;
}

.doc-link {
    color: #475569;
}

.dashboard-btn {
    margin-left: 0.3rem;
    border: 1px solid #0284c7;
    color: #fff;
    background: #0891b2;
    padding: 0.52rem 0.9rem;
    border-radius: 8px;
    font-weight: 700;
}

.hero {
    padding: 2rem 0 1.2rem;
}

.hero-wrap {
    display: grid;
    gap: 1rem;
    grid-template-columns: 1.6fr 1fr;
}

.hero-main,
.purchase-panel,
.compare-panel,
.support,
.feature-card,
.services,
.trust,
.why,
.site-footer {
    border-radius: 14px;
}

.hero-main {
    background: var(--paper);
    border: 1px solid var(--line);
    padding: 1.3rem;
}

.tag {
    display: inline-block;
    margin: 0;
    font-size: 0.8rem;
    font-weight: 800;
    color: var(--brand);
    letter-spacing: 0.08em;
}

.guide-link {
    float: right;
    color: var(--brand);
    font-weight: 700;
}

h1 {
    margin: 0.75rem 0 0.35rem;
    font-size: clamp(2rem, 5vw, 3rem);
}

.price {
    margin: 0 0 1rem;
    color: #1f8a00;
    font-size: 1.1rem;
    font-weight: 900;
}

.compare-panel {
    background: #f6fbff;
    border: 1px solid #d0e0ea;
    padding: 1rem;
}

.compare-panel h3 { margin-top: 0; }

.compare-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.85rem;
}

.compare-grid article {
    border: 1px solid #d2dce4;
    background: #fff;
    border-radius: 10px;
    padding: 0.85rem;
}

.compare-grid h4 { margin: 0; }
.compare-grid p { color: var(--muted); min-height: 40px; }
.compare-grid strong { color: #111827; }

.purchase-panel {
    background: linear-gradient(180deg, #f4f8fc 0%, #e9f0f7 100%);
    color: #1f2937;
    border: 1px solid #c9d7e6;
    padding: 1.1rem;
}

.purchase-panel h3 { margin-top: 0; }

.buy-form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.8rem 1rem;
}

.field label {
    display: block;
    margin-bottom: 0.32rem;
    color: #64748b;
    font-size: 0.8rem;
    text-transform: none;
}

.field input,
.field select {
    width: 100%;
    background: transparent;
    border: 0;
    border-bottom: 1px solid #aabbd0;
    color: #1e293b;
    padding: 0.35rem 0.12rem 0.5rem;
    font-size: 1.05rem;
    outline: none;
}

.field select {
    appearance: none;
    -webkit-appearance: none;
    background-color: transparent;
    color: #1e293b;
}

.field input[readonly] {
    color: #1e293b;
}

.field select option {
    background: #ffffff;
    color: #1e293b;
}

.field select option:checked {
    background: #dbeafe;
    color: #fff;
}

.target-field {
    margin-top: 0.95rem;
}

.summary-card {
    margin-top: 1.2rem;
    border-top: 1px solid #c5d3e2;
    padding-top: 0.85rem;
}

.summary-row {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    padding: 0.35rem 0;
    font-size: 1.25rem;
}

.summary-row span {
    color: #475569;
    font-size: 1.05rem;
}

.summary-row strong {
    color: #000000;
}

.summary-row:last-child strong {
    color: #000000;
}

.knowledge {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
    padding: 0.9rem 0 0.2rem;
}

.knowledge a {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 0.45rem 0.75rem;
    font-size: 0.88rem;
    color: #35516b;
}

.support {
    margin-top: 1rem;
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    background: #fff;
    border: 1px solid var(--line);
    padding: 1rem 1.1rem;
}

.support h3 { margin: 0 0 0.35rem; }
.support p { margin: 0; color: var(--muted); }

.feature-duo {
    margin-top: 1rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.feature-card {
    background: #fff;
    border: 1px solid var(--line);
    padding: 1.1rem;
}

.feature-card h2 {
    margin-top: 0;
    font-size: 1.5rem;
}

.feature-card p { color: var(--muted); }

.feature-card ul {
    margin: 0.9rem 0 1rem;
    padding-left: 1.1rem;
    color: #2f3e4d;
}

.feature-card li { margin-bottom: 0.35rem; }

.feature-card a {
    color: var(--brand);
    font-weight: 800;
}

.services {
    margin-top: 1rem;
    background: #0e1e30;
    border: 1px solid #23394f;
    color: #e5ecf3;
    padding: 1.2rem 0;
}

.services h2,
.services p { margin-top: 0; }

.service-grid {
    display: grid;
    gap: 0.8rem;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.service-grid article {
    border: 1px solid #2c455c;
    border-radius: 10px;
    background: #12283d;
    padding: 0.85rem;
}

.service-grid h4 { margin: 0 0 0.4rem; }
.service-grid p { margin: 0; color: #afc1d1; }

.trust {
    margin-top: 1rem;
    background: #fff;
    border: 1px solid var(--line);
    padding: 1.2rem;
}

.trust h2 { margin-top: 0; }
.trust > p { color: var(--muted); }

.trust-grid {
    margin-top: 0.8rem;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.8rem;
}

.trust-grid article {
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 0.8rem;
    background: #f9fcff;
}

.trust-grid h4 { margin: 0 0 0.4rem; }
.trust-grid p { margin: 0; color: #5b6b78; }

.why {
    margin-top: 1rem;
    background: #fff;
    border: 1px solid var(--line);
    padding: 1.2rem 0;
}

.why h2 { margin-top: 0; }

.why-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.8rem;
}

.why-grid article {
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 0.85rem;
}

.why-grid h4 { margin: 0 0 0.3rem; }
.why-grid p { margin: 0; color: var(--muted); }

.orders-section {
    margin-top: 1rem;
    background: #f6f9fc;
    border: 1px solid #cfdbe9;
    border-radius: 12px;
    padding: 0.9rem;
}

.orders-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 0.6rem;
}

.orders-head h2 {
    margin: 0;
    font-size: 1.2rem;
}

.orders-wrap {
    overflow: auto;
    border: 1px solid #d4deea;
    border-radius: 10px;
    background: #fff;
}

.orders-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 880px;
}

.orders-table th,
.orders-table td {
    padding: 0.72rem 0.62rem;
    border-bottom: 1px solid #edf2f7;
    text-align: left;
}

.orders-table th {
    color: #5b6b79;
    font-weight: 700;
    background: #f8fbff;
}

.orders-table td {
    color: #1f2937;
}

.orders-table td.mono {
    font-family: Consolas, "Courier New", monospace;
    letter-spacing: 0.2px;
}

.sub-page {
    padding: 2rem 0 3rem;
}

.sub-page-wrap {
    background: #f7fbff;
    border: 1px solid #d5e2ef;
    border-radius: 14px;
    padding: 1.3rem;
}

.sub-kicker {
    margin: 0;
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.09em;
    color: #0f766e;
}

.sub-page h1 {
    margin: 0.4rem 0 0.55rem;
}

.sub-summary {
    margin: 0 0 1rem;
    color: #526173;
    max-width: 920px;
}

.sub-card {
    background: #fff;
    border: 1px solid #dbe5ef;
    border-radius: 12px;
    padding: 1rem;
}

.sub-card h3 {
    margin-top: 0;
}

.sub-page-grid {
    display: block;
}

.sub-page-grid-docs {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 1rem;
    align-items: start;
}

.sub-card ul {
    margin: 0.75rem 0 1rem;
    padding-left: 1.1rem;
    color: #334155;
}

.sub-card li {
    margin-bottom: 0.34rem;
}

.sub-cta {
    display: inline-block;
    border: 1px solid #0ea5e9;
    background: #0ea5e9;
    color: #fff;
    padding: 0.48rem 0.8rem;
    border-radius: 8px;
    font-weight: 700;
}

.doc-sidebar {
    position: sticky;
    top: 92px;
    background: #ffffff;
    border: 1px solid #dbe5ef;
    border-radius: 12px;
    padding: 0.85rem;
}

.doc-sidebar h4 {
    margin: 0 0 0.6rem;
    font-size: 0.95rem;
    color: #1e293b;
}

.doc-menu-link {
    display: block;
    border: 1px solid #e5edf5;
    border-radius: 8px;
    padding: 0.52rem 0.62rem;
    margin-bottom: 0.45rem;
    color: #475569;
    font-weight: 600;
    background: #f8fbff;
}

.doc-menu-link:hover {
    border-color: #bae6fd;
    background: #f0f9ff;
    color: #0c4a6e;
}

.doc-menu-link.active {
    border-color: #22c55e;
    background: #f0fdf4;
    color: #15803d;
}

.doc-updated {
    margin: 0.5rem 0 0;
    font-size: 0.8rem;
    color: #64748b;
}

.doc-content {
    margin-top: 1rem;
    border-top: 1px solid #e2e8f0;
    padding-top: 1rem;
}

.doc-content h4 {
    margin: 0.7rem 0 0.45rem;
    color: #1e293b;
}

.doc-rate {
    margin: 0 0 0.6rem;
    color: #334155;
}

.doc-code {
    margin: 0;
    background: #0f172a;
    color: #e2e8f0;
    border: 1px solid #1e293b;
    border-radius: 10px;
    padding: 0.75rem;
    overflow: auto;
    font-family: Consolas, "Courier New", monospace;
    font-size: 0.88rem;
    line-height: 1.55;
}

.site-footer {
    margin-top: 1rem;
    background: #0a1422;
    color: #d0deea;
    border-radius: 0;
}

.footer-top {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
    gap: 1rem;
    padding: 1.35rem 0;
}

.brand-col h3 {
    margin: 0 0 0.35rem;
    color: #fff;
}

.brand-col p { margin: 0.25rem 0; color: #aac0d3; }

.status {
    display: inline-block;
    margin-top: 0.45rem;
    background: #133148;
    border: 1px solid #2e4f67;
    padding: 0.24rem 0.58rem;
    border-radius: 999px;
    color: #7fffcf;
    font-size: 0.8rem;
}

.site-footer h4 {
    margin: 0 0 0.45rem;
    color: #fff;
}

.site-footer a,
.site-footer p {
    display: block;
    margin: 0.26rem 0;
    color: #aac0d3;
    font-size: 0.93rem;
}

.footer-bottom {
    border-top: 1px solid #22364a;
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.85rem 0 1.15rem;
    font-size: 0.88rem;
    color: #95abc0;
}

.footer-bottom div {
    display: flex;
    gap: 0.8rem;
    flex-wrap: wrap;
}

@media (max-width: 1100px) {
    .hero-wrap,
    .feature-duo,
    .service-grid,
    .trust-grid,
    .why-grid,
    .footer-top {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 800px) {
    .main-nav { display: none; }
    .dashboard-btn { margin-left: auto; }

    .hero-wrap,
    .buy-form-grid,
    .compare-grid,
    .feature-duo,
    .service-grid,
    .trust-grid,
    .why-grid,
    .footer-top {
        grid-template-columns: 1fr;
    }

    .support,
    .footer-bottom {
        flex-direction: column;
    }

    .orders-head {
        flex-direction: column;
        align-items: flex-start;
    }

    .sub-page-grid-docs {
        grid-template-columns: 1fr;
    }

    .doc-sidebar {
        position: static;
    }
}