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

:root {
    --znq-primary: #24485c;
    --znq-secondary: #3a7089;
    --znq-accent: #4fc59a;
    --znq-ink: #16242c;
    --znq-muted: #5a6f7c;
    --znq-line: #d5e3ea;
    --znq-paper: #ffffff;
    --znq-surface: #eff5f8;
    --znq-ui: "Trebuchet MS", "Segoe UI", Verdana, sans-serif;
    --znq-serif: "Palatino Linotype", Palatino, Georgia, serif;
    --znq-r1: 10px;
    --znq-r2: 16px;
    --znq-r3: 26px;
    --znq-sh1: 0 8px 20px rgba(22, 36, 44, .07);
    --znq-sh2: 0 16px 38px rgba(22, 36, 44, .13);
    --znq-sh3: 0 26px 58px rgba(22, 36, 44, .18);
}

html { scroll-behavior: smooth; }

body {
    font-family: var(--znq-serif);
    background:
        radial-gradient(circle at top left, rgba(79, 197, 154, .14), transparent 34%),
        linear-gradient(180deg, #ffffff 0%, #eff5f8 100%);
    color: var(--znq-ink);
    line-height: 1.74;
    font-size: 16px;
}

a {
    color: var(--znq-secondary);
    text-decoration: none;
    transition: color .2s ease;
}
a:hover { color: var(--znq-primary); }

.znq-topbar {
    position: sticky;
    top: 0;
    z-index: 20;
    padding: 16px 20px;
    background: rgba(255, 255, 255, .9);
    backdrop-filter: blur(14px);
    border-bottom: 2px solid rgba(36, 72, 92, .14);
}
.znq-topbar-inner {
    max-width: 1120px;
    margin: 0 auto;
    text-align: center;
}
.znq-topbar-logo {
    font-family: var(--znq-ui);
    font-size: 20px;
    letter-spacing: .22em;
    text-transform: uppercase;
    font-weight: 900;
    color: var(--znq-primary);
}

.znq-doc {
    max-width: 880px;
    margin: 0 auto;
    padding: 40px 20px 76px;
}

.znq-doc-head {
    padding-bottom: 18px;
    margin-bottom: 26px;
    border-bottom: 3px solid var(--znq-accent);
}
.znq-doc-title {
    font-size: clamp(26px, 4vw, 40px);
    line-height: 1.16;
    color: var(--znq-primary);
    margin-bottom: 8px;
}
.znq-doc-meta {
    font-family: var(--znq-ui);
    font-size: 13px;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--znq-muted);
}
.znq-doc-meta strong { color: var(--znq-secondary); }

.znq-toc {
    background: var(--znq-surface);
    border: 1px solid var(--znq-line);
    border-left: 5px solid var(--znq-secondary);
    border-radius: var(--znq-r1);
    padding: 18px 22px 16px;
    margin-bottom: 34px;
}
.znq-toc-caption {
    font-family: var(--znq-ui);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: .16em;
    text-transform: uppercase;
    color: var(--znq-primary);
    margin-bottom: 10px;
}
.znq-toc-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 4px 24px;
}
.znq-toc-list li {
    position: relative;
    padding-left: 14px;
    font-family: var(--znq-ui);
    font-size: 14px;
    line-height: 1.6;
}
.znq-toc-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--znq-accent);
}
.znq-toc-link {
    color: var(--znq-secondary);
    border-bottom: 1px dotted rgba(58, 112, 137, .5);
}
.znq-toc-link:hover {
    color: var(--znq-primary);
    border-bottom-color: var(--znq-primary);
}

.znq-sec {
    margin-bottom: 30px;
    scroll-margin-top: 84px;
}
.znq-sec-title {
    font-size: clamp(19px, 2.6vw, 25px);
    line-height: 1.24;
    color: var(--znq-primary);
    margin-bottom: 10px;
}
.znq-sec-sub {
    font-family: var(--znq-ui);
    font-size: 16px;
    line-height: 1.4;
    color: var(--znq-ink);
    margin: 18px 0 8px;
}
.znq-sec p {
    color: var(--znq-muted);
    margin-bottom: 13px;
}
.znq-sec ul,
.znq-sec ol {
    padding-left: 22px;
    margin: 0 0 15px;
    color: var(--znq-muted);
}
.znq-sec li { margin-bottom: 6px; }
.znq-sec strong { color: var(--znq-ink); }
.znq-sec a { border-bottom: 1px dotted rgba(58, 112, 137, .5); }

.znq-note {
    margin: 18px 0 20px;
    padding: 16px 20px;
    border-radius: var(--znq-r1);
    background: rgba(79, 197, 154, .12);
    border: 1px dashed rgba(36, 72, 92, .3);
    font-family: var(--znq-ui);
    font-size: 15px;
    line-height: 1.66;
    color: var(--znq-ink);
}
.znq-note p { margin: 0; color: var(--znq-ink); }

.znq-pairs {
    list-style: none;
    padding: 0;
    margin: 6px 0 16px;
    border-top: 1px solid var(--znq-line);
}
.znq-pairs li {
    padding: 10px 2px;
    border-bottom: 1px solid var(--znq-line);
    font-family: var(--znq-ui);
    font-size: 15px;
    line-height: 1.6;
    color: var(--znq-muted);
    margin: 0;
}
.znq-pairs b {
    display: block;
    color: var(--znq-primary);
    font-size: 14px;
    letter-spacing: .02em;
}

.znq-footer {
    margin-top: 40px;
    background: var(--znq-ink);
    color: #a9c0cb;
    padding: 26px 20px 22px;
    font-family: var(--znq-ui);
    text-align: center;
    border-top: 4px solid var(--znq-accent);
}
.znq-footer-inner {
    max-width: 900px;
    margin: 0 auto;
}
.znq-footer-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px 22px;
    margin-bottom: 12px;
}
.znq-footer-nav a {
    color: #a9c0cb;
    font-size: 12px;
    text-decoration: none;
}
.znq-footer-nav a:hover { color: var(--znq-accent); }
.znq-footer-copy {
    font-size: 12px;
    color: #8ea6b2;
}

@media (max-width: 720px) {
    .znq-doc { padding: 28px 18px 60px; }
    .znq-toc { padding: 16px 16px 14px; }
    .znq-toc-list { gap: 2px 16px; }
}