:root {
    --lbs-accent: #75d7e8;
    --lbs-gold: #d8bd68;
    --lbs-panel: rgba(255, 255, 255, 0.045);
    --lbs-line: rgba(255, 255, 255, 0.12);
    --lbs-muted: rgba(255, 255, 255, 0.66);
}

html { scroll-behavior: smooth; }

.lbs-main {
    padding: 0;
    background: #05040A;
}

.lbs-article {
    width: min(1080px, calc(100% - 64px));
    margin: 0 auto;
    padding: 52px 0 70px;
}

.lbs-hero {
    position: relative;
    min-height: 330px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    border-bottom: 1px solid var(--lbs-line);
}

.lbs-hero::after {
    content: "LBS";
    position: absolute;
    right: 0;
    bottom: 4px;
    color: rgba(117, 215, 232, 0.055);
    font-size: 190px;
    font-weight: 900;
    line-height: 0.8;
    pointer-events: none;
}

.lbs-kicker {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--lbs-accent);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.12em;
}

.lbs-kicker img { width: 30px; height: 30px; border-radius: 6px; }

.lbs-hero h1 {
    position: relative;
    z-index: 1;
    margin: 18px 0 12px;
    font-size: clamp(38px, 6vw, 68px);
    line-height: 1.08;
    letter-spacing: 0;
}

.lbs-lead {
    position: relative;
    z-index: 1;
    max-width: 760px;
    margin: 0;
    color: rgba(255, 255, 255, 0.76);
    font-size: 17px;
    line-height: 1.85;
}

.lbs-hero-summary {
    position: relative;
    z-index: 1;
    display: flex;
    flex-wrap: wrap;
    gap: 0;
    margin-top: 32px;
}

.lbs-hero-summary span {
    padding: 0 24px;
    border-left: 1px solid var(--lbs-line);
    color: var(--lbs-muted);
    font-size: 12px;
}

.lbs-hero-summary span:first-child { padding-left: 0; border-left: 0; }
.lbs-hero-summary b { display: block; color: #fff; font-size: 20px; margin-bottom: 3px; }

.lbs-toc {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    gap: 20px;
    overflow-x: auto;
    padding: 13px 0;
    background: rgba(5, 4, 10, 0.94);
    border-bottom: 1px solid var(--lbs-line);
    backdrop-filter: blur(12px);
}

.lbs-toc a {
    flex: 0 0 auto;
    color: rgba(255, 255, 255, 0.58);
    font-size: 12px;
    font-weight: 700;
    text-decoration: none;
}

.lbs-toc a:hover,
.lbs-toc a.is-active { color: var(--lbs-accent); }

.lbs-section {
    scroll-margin-top: 58px;
    padding: 62px 0;
    border-bottom: 1px solid var(--lbs-line);
}

.lbs-section-heading {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 26px;
}

.lbs-section-heading > span {
    color: var(--lbs-gold);
    font-size: 13px;
    font-weight: 900;
}

.lbs-section-heading p {
    margin: 0 0 3px;
    color: rgba(117, 215, 232, 0.7);
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 0.14em;
}

.lbs-section h2 { margin: 0; font-size: 27px; letter-spacing: 0; }
.lbs-section h3 { margin: 38px 0 10px; color: #fff; font-size: 18px; }
.lbs-section > p { max-width: 900px; color: var(--lbs-muted); line-height: 1.9; }
.lbs-section strong { color: #fff; }

.lbs-problem-list {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1px;
    margin-top: 28px;
    overflow: hidden;
    border: 1px solid var(--lbs-line);
    background: var(--lbs-line);
}

.lbs-problem-list article { padding: 22px; background: #0d0e16; }
.lbs-problem-list b { color: #fff; font-size: 15px; }
.lbs-problem-list p { margin: 12px 0 0; color: var(--lbs-muted); font-size: 13px; line-height: 1.75; }

.lbs-note,
.lbs-rule-callout {
    margin-top: 26px;
    padding: 18px 20px;
    border-left: 3px solid var(--lbs-accent);
    background: rgba(117, 215, 232, 0.07);
}

.lbs-note b { color: var(--lbs-accent); }
.lbs-note p,
.lbs-rule-callout p { margin: 7px 0 0; color: rgba(255, 255, 255, 0.72); line-height: 1.75; }

.lbs-table-wrap,
.lbs-example-table-wrap { overflow-x: auto; }

.lbs-compare-table,
.lbs-example-table { width: 100%; border-collapse: collapse; min-width: 680px; }
.lbs-compare-table th,
.lbs-compare-table td,
.lbs-example-table th,
.lbs-example-table td { padding: 15px 18px; border-bottom: 1px solid var(--lbs-line); text-align: left; }
.lbs-compare-table thead th,
.lbs-example-table thead th { color: var(--lbs-accent); font-size: 12px; }
.lbs-compare-table tbody th { width: 30%; color: #fff; font-size: 13px; }
.lbs-compare-table td,
.lbs-example-table td { color: rgba(255, 255, 255, 0.7); font-size: 13px; }
.lbs-compare-table td:last-child { background: rgba(117, 215, 232, 0.05); }
.lbs-caption { font-size: 12px; }

.lbs-stat-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 1px;
    margin: 22px 0;
    background: var(--lbs-line);
    border: 1px solid var(--lbs-line);
}

.lbs-stat-grid span { display: flex; justify-content: space-between; gap: 8px; padding: 13px; background: #0d0e16; color: rgba(255, 255, 255, 0.7); font-size: 12px; }
.lbs-stat-grid b { color: var(--lbs-gold); }

.lbs-formula-row {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    margin: 25px 0;
}

.lbs-formula-row div { padding: 0 0 14px; border-bottom: 2px solid rgba(117, 215, 232, 0.34); }
.lbs-formula-row small { display: block; margin-bottom: 8px; color: var(--lbs-muted); }
.lbs-formula-row strong { font-size: 18px; }

.lbs-flow { margin: 30px 0; padding: 0; list-style: none; }
.lbs-flow li { display: grid; grid-template-columns: 42px 1fr; gap: 15px; padding: 17px 0; border-bottom: 1px solid var(--lbs-line); }
.lbs-flow li > span { display: grid; place-items: center; width: 32px; height: 32px; border: 1px solid rgba(216, 189, 104, 0.55); color: var(--lbs-gold); font-weight: 900; }
.lbs-flow b { color: #fff; }
.lbs-flow p { margin: 5px 0 0; color: var(--lbs-muted); font-size: 13px; line-height: 1.7; }

.lbs-check-list { display: grid; gap: 0; margin: 26px 0 0; padding: 0; list-style: none; }
.lbs-check-list li { position: relative; padding: 13px 10px 13px 34px; border-bottom: 1px solid var(--lbs-line); color: var(--lbs-muted); line-height: 1.65; }
.lbs-check-list li::before { content: "✓"; position: absolute; left: 8px; color: var(--lbs-accent); font-weight: 900; }

.lbs-example-table th { color: #fff; font-size: 12px; }

.lbs-section details { border-bottom: 1px solid var(--lbs-line); }
.lbs-section summary { cursor: pointer; padding: 18px 2px; color: #fff; font-weight: 700; }
.lbs-section details p { margin: -4px 0 20px; max-width: 900px; color: var(--lbs-muted); line-height: 1.8; }

.lbs-cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
    padding: 46px 0;
    border-bottom: 1px solid var(--lbs-line);
}
.lbs-cta p { margin: 0 0 6px; color: var(--lbs-accent); font-size: 10px; font-weight: 900; letter-spacing: 0.13em; }
.lbs-cta h2 { margin: 0 0 8px; font-size: 24px; }
.lbs-cta div > span { color: var(--lbs-muted); font-size: 13px; }
.lbs-cta a { flex: 0 0 auto; padding: 12px 16px; border: 1px solid rgba(117, 215, 232, 0.5); color: #fff; text-decoration: none; font-size: 13px; font-weight: 800; }
.lbs-cta a:hover { background: rgba(117, 215, 232, 0.12); }
.lbs-cta a span { margin-left: 8px; color: var(--lbs-accent); }

.site-footer { margin-top: 34px; color: rgba(255, 255, 255, 0.42); font-size: 11px; line-height: 1.7; }

@media (max-width: 900px) {
    .lbs-article { width: min(100% - 36px, 1080px); padding-top: 24px; }
    .lbs-hero { min-height: 300px; }
    .lbs-hero::after { font-size: 120px; }
    .lbs-problem-list { grid-template-columns: 1fr; }
    .lbs-stat-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .lbs-formula-row { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .lbs-main { padding-top: 60px; }
    .lbs-toc { top: 60px; }
    .lbs-section { scroll-margin-top: 112px; padding: 46px 0; }
    .lbs-hero h1 { font-size: 38px; }
    .lbs-hero-summary span { width: 50%; box-sizing: border-box; margin-bottom: 18px; padding-left: 14px; }
    .lbs-cta { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 480px) {
    .lbs-article { width: min(100% - 28px, 1080px); }
    .lbs-hero::after { font-size: 88px; }
    .lbs-lead { font-size: 15px; }
    .lbs-stat-grid { grid-template-columns: 1fr; }
    .lbs-section h2 { font-size: 22px; }
}