.feat-page-header {
    border-bottom: var(--border-heavy);
}

.feat-header-top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 48px;
    border-bottom: var(--border);
    background: var(--g50);
}

.feat-breadcrumb {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--g500);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 8px;
}

.feat-breadcrumb a {
    color: var(--g500);
    text-decoration: none;
    transition: color var(--transition);
}

.feat-breadcrumb a:hover {
    color: var(--black);
}

.crumb-sep {
    color: var(--g300);
}

.feat-count {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--g400);
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.feat-header-body {
    position: relative;
    padding: 72px 48px 80px;
    overflow: hidden;
}

.feat-watermark {
    position: absolute;
    bottom: -0.12em;
    left: 48px;
    font-family: var(--font-mono);
    font-size: clamp(5rem, 13vw, 13rem);
    font-weight: 800;
    color: var(--g100);
    letter-spacing: -0.05em;
    line-height: 1;
    pointer-events: none;
    user-select: none;
    white-space: nowrap;
}

.feat-header-text {
    position: relative;
    z-index: 1;
}

.feat-header-text h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: 12px;
}

.feat-header-desc {
    font-size: 0.95rem;
    color: var(--g600);
    line-height: 1.7;
    max-width: 480px;
}

.feat-table-section {
    border-bottom: var(--border-heavy);
}

.feat-table {
    width: 100%;
    border-collapse: collapse;
    table-layout: fixed;
}

.feat-table thead th {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--g500);
    text-align: left;
    padding: 14px 20px;
    border-bottom: var(--border-heavy);
    background: var(--g50);
    white-space: nowrap;
}

.feat-table thead th.col-num { width: 64px; }
.feat-table thead th.col-module { width: 180px; }
.feat-table thead th.col-category { width: 130px; }
.feat-table thead th.col-status { width: 90px; }
.feat-table thead th.col-toggle { width: 48px; }

.feat-row {
    border-bottom: var(--border-light);
}

.feat-row:last-child {
    border-bottom: none;
}

.feat-row-summary {
    cursor: pointer;
    transition: background-color var(--transition);
}

.feat-row-summary td {
    padding: 16px 20px;
    vertical-align: middle;
    font-size: 0.85rem;
    color: var(--g700);
    border-bottom: var(--border-light);
}

.feat-row-summary:hover td {
    background: var(--g50);
}

.feat-row.open .feat-row-summary td {
    background: var(--g50);
    border-bottom-color: var(--black);
}

.cell-num {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--g400);
    letter-spacing: 0.02em;
}

.cell-module {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.cell-module span:first-child {
    font-weight: 700;
    color: var(--black);
    font-size: 0.9rem;
}

.module-en {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    font-weight: 700;
    color: var(--g400);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.cell-desc {
    color: var(--g600);
    font-size: 0.8rem;
    line-height: 1.5;
}

.cell-toggle {
    text-align: center;
    position: relative;
}

.cell-toggle::after {
    content: '+';
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--g300);
    transition: color var(--transition);
}

.feat-row.open .feat-row-summary .cell-toggle::after {
    content: '−';
    color: var(--black);
}

.feat-row-summary:hover .cell-toggle::after {
    color: var(--black);
}

.status-badge {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 3px 8px;
    border: var(--border);
}

.status-live {
    color: var(--black);
    border-color: var(--black);
}

.status-beta {
    color: var(--g500);
    border-color: var(--g400);
    background: var(--g50);
}

.feat-row-detail {
    display: none;
}

.feat-row.open .feat-row-detail {
    display: table-row;
}

.feat-row-detail > td {
    padding: 0;
    background: var(--g50);
    border-bottom: var(--border-heavy);
}

.feat-expand {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 0;
    padding: 28px 20px 28px 64px;
}

.feat-expand-desc p {
    font-size: 0.85rem;
    line-height: 1.8;
    color: var(--g600);
    max-width: 520px;
}

.feat-expand-attrs {
    border-left: var(--border);
    padding-left: 24px;
    margin-left: 24px;
    display: flex;
    flex-direction: column;
}

.attr-pair {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: var(--border-light);
    gap: 16px;
}

.attr-pair:last-child {
    border-bottom: none;
}

.attr-k {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--g500);
    letter-spacing: 0.04em;
    white-space: nowrap;
}

.attr-v {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--black);
    letter-spacing: -0.01em;
}

.attr-v i.fa-check {
    font-size: 0.7rem;
}

.feat-cta-section {
    border-top: var(--border-heavy);
}

.feat-cta-bar {
    background: var(--black);
    padding: 40px 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

.feat-cta-left span {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 700;
    color: var(--white);
    letter-spacing: -0.01em;
}

.feat-cta-right {
    display: flex;
    gap: 12px;
    flex-shrink: 0;
}

.btn-ghost-muted {
    border-color: rgba(255, 255, 255, 0.25);
    color: rgba(255, 255, 255, 0.55);
}

.btn-ghost-muted:hover {
    background: var(--white);
    color: var(--black);
    border-color: var(--white);
}

@media (max-width: 1024px) {
    .feat-header-top-bar {
        padding: 10px 24px;
    }

    .feat-header-body {
        padding: 56px 24px 64px;
    }

    .feat-watermark {
        left: 24px;
    }

    .feat-expand {
        padding-left: 20px;
    }

    .feat-table thead th.col-module { width: 160px; }
    .feat-table thead th.col-category { width: 110px; }
}

@media (max-width: 768px) {
    .feat-header-top-bar {
        padding: 10px 16px;
    }

    .feat-header-body {
        padding: 40px 16px 56px;
    }

    .feat-watermark {
        left: 16px;
        font-size: clamp(3.5rem, 18vw, 7rem);
    }

    .feat-table thead th,
    .feat-row-summary td {
        padding: 12px 12px;
    }

    .feat-table thead th:nth-child(4),
    .feat-row-summary td:nth-child(4) {
        display: none;
    }

    .feat-expand {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 20px 16px;
    }

    .feat-expand-attrs {
        border-left: none;
        border-top: var(--border);
        padding-left: 0;
        margin-left: 0;
        padding-top: 16px;
    }

    .feat-cta-bar {
        flex-direction: column;
        align-items: flex-start;
        padding: 32px 16px;
        gap: 20px;
    }

    .feat-cta-right {
        flex-direction: column;
        width: 100%;
    }

    .feat-cta-right .btn {
        text-align: center;
        justify-content: center;
    }

    .feat-table thead th.col-module { width: auto; }
    .feat-table thead th.col-category { width: auto; }
}

@media (max-width: 480px) {
    .feat-table thead th:nth-child(3),
    .feat-row-summary td:nth-child(3) {
        display: none;
    }

    .feat-table thead th.col-num { width: 44px; }
    .feat-table thead th.col-toggle { width: 36px; }

    .cell-module span:first-child {
        font-size: 0.8rem;
    }

    .module-en {
        font-size: 0.55rem;
    }
}