:root {
        --tt-red: #f04142;
        --tt-red-dark: #d91f26;
        --tt-ink: #222226;
        --tt-muted: #737985;
        --tt-line: #eceff3;
        --tt-bg: #f6f7f9;
        --tt-card: #ffffff;
        --tt-soft: #fff4f4;
    }

/* 2026-07 visual baseline: a compact engineering publication, not a news portal. */
:root {
    --tt-red: #176672;
    --tt-red-dark: #104c55;
    --tt-ink: #17232d;
    --tt-muted: #62707c;
    --tt-line: #dce4e8;
    --tt-bg: #f6f8f8;
    --tt-card: #ffffff;
    --tt-soft: #eaf3f2;
}

.tt-body {
    background: var(--tt-bg);
    color: var(--tt-ink);
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.tt-header {
    background: rgba(255, 255, 255, .97);
    border-bottom: 1px solid var(--tt-line);
    box-shadow: none;
    backdrop-filter: blur(10px);
}

.tt-header-row { min-height: 68px; gap: 26px; }
.tt-brand { color: var(--tt-ink); font-size: 21px; font-weight: 760; letter-spacing: 0; }
.tt-topnav { gap: 20px; color: #50606d; font-size: 14px; font-weight: 600; }
.tt-topnav a { padding: 23px 0 20px; border-bottom-width: 2px; }
.tt-topnav a:hover, .tt-topnav a.is-active { color: var(--tt-red); }
.tt-beta-link, .tt-pricing-link { border-radius: 5px; box-shadow: none; }

.tt-main { padding-top: 28px; }
.tt-layout { grid-template-columns: minmax(0, 1fr) 286px; gap: 28px; padding-bottom: 48px; }
.tt-layout > .tt-channel-rail { display: none; }
.tt-feed { gap: 0; }

.tt-page-head,
.tt-feed-card,
.tt-panel,
.tt-article-card,
.tt-article-main,
.tt-related-block {
    border-color: var(--tt-line);
    border-radius: 6px;
    box-shadow: none;
}

.tt-page-head {
    padding: 32px 34px;
    background: #fff;
}

.tt-page-kicker {
    color: var(--tt-red);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .06em;
}

.tt-page-title {
    max-width: 820px;
    color: var(--tt-ink);
    font-size: clamp(32px, 3.6vw, 44px);
    line-height: 1.18;
    font-weight: 760;
    letter-spacing: 0;
}

.tt-page-desc { max-width: 760px; color: var(--tt-muted); font-size: 16px; line-height: 1.8; }

.tt-home-conversion {
    grid-template-columns: minmax(0, 1fr) auto;
    padding: 24px 28px;
    border: 1px solid #cddfdd;
    border-radius: 6px;
    background: #edf5f4;
    box-shadow: none;
}
.tt-home-conversion h2 { font-size: 21px; letter-spacing: 0; }
.tt-home-conversion p { color: #566875; }
.tt-home-conversion-actions { gap: 8px; }
.tt-home-conversion-primary,
.tt-home-conversion-secondary {
    min-height: 40px;
    padding: 0 14px;
    border-radius: 5px;
    font-size: 14px;
    font-weight: 700;
    box-shadow: none;
}
.tt-home-conversion-primary { background: var(--tt-red); }
.tt-home-conversion-secondary { border-color: #bcd4d0; color: var(--tt-red); }

.tt-feed-card { padding: 0; overflow: hidden; background: #fff; }
.tt-section-title { min-height: 60px; margin: 0; padding: 0 26px; border-bottom: 1px solid var(--tt-line); font-size: 17px; }
.tt-section-title::before { width: 3px; height: 16px; margin-right: 8px; border-radius: 0; background: var(--tt-red); }

.tt-article-card {
    grid-template-columns: minmax(0, 1fr) 130px;
    gap: 22px;
    padding: 25px 26px;
    border: 0;
    border-bottom: 1px solid var(--tt-line);
    border-radius: 0;
    transition: background .16s ease;
}
.tt-article-card:last-child { border-bottom: 0; }
.tt-article-card:hover { transform: none; box-shadow: none; background: #f9fbfb; }
.tt-article-title { margin-top: 9px; color: var(--tt-ink); font-size: 21px; line-height: 1.38; font-weight: 740; letter-spacing: 0; }
.tt-article-title a:hover, .tt-card-action { color: var(--tt-red); }
.tt-article-summary { max-width: 66ch; color: var(--tt-muted); font-size: 15px; line-height: 1.76; }
.tt-thumb { min-height: 96px; border: 1px solid #cddedb; border-radius: 5px; background: var(--tt-soft); color: var(--tt-red); }
.tt-pill { border-radius: 4px; background: var(--tt-soft); color: var(--tt-red); }

.tt-sidebar { top: 92px; gap: 18px; }
.tt-sidebar .tt-panel { padding: 20px; }
.tt-feed-panel { border-top: 3px solid var(--tt-red); border-left: 1px solid var(--tt-line); }
.tt-feed-panel-title { font-size: 20px; line-height: 1.4; letter-spacing: 0; }
.tt-feed-panel-desc, .tt-hot-item { color: #556673; }
.tt-hot-list { gap: 0; }
.tt-hot-item { padding: 12px 0; border-bottom: 1px solid var(--tt-line); font-weight: 600; }
.tt-hot-item:last-child { border-bottom: 0; }
.tt-hot-index, .tt-hot-item:nth-child(-n+3) .tt-hot-index { border-radius: 4px; background: var(--tt-soft); color: var(--tt-red); }

.tt-article-main { padding: clamp(28px, 4vw, 48px); }
.tt-article-h1 { color: var(--tt-ink); font-size: clamp(30px, 3.4vw, 42px); line-height: 1.2; letter-spacing: 0; }
.tt-prose { max-width: 76ch; color: #354653; font-size: 17px; line-height: 1.9; }
.tt-prose h2 { color: var(--tt-ink); border-left: 3px solid var(--tt-red); padding-left: 12px; font-size: 25px; letter-spacing: 0; }
.tt-prose h3 { color: var(--tt-ink); letter-spacing: 0; }
.tt-prose a { color: var(--tt-red); }
.tt-prose blockquote { border-left-color: var(--tt-red); border-radius: 0; background: var(--tt-soft); }
.tt-prose img { border-radius: 6px; box-shadow: none; }

.tt-footer { border-top-color: var(--tt-line); background: #fff; }

@media (max-width: 920px) {
    .tt-layout { grid-template-columns: 1fr; }
    .tt-sidebar { position: static; grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
    .tt-shell { width: min(100% - 28px, 1180px); }
    .tt-header-row { min-height: 60px; }
    .tt-main { padding-top: 16px; }
    .tt-page-head { padding: 24px 20px; }
    .tt-page-title { font-size: 30px; }
    .tt-page-desc { font-size: 15px; }
    .tt-home-conversion { display: block; padding: 20px; }
    .tt-home-conversion-actions { justify-content: flex-start; margin-top: 16px; }
    .tt-article-card { grid-template-columns: 1fr; gap: 14px; padding: 20px; }
    .tt-thumb { min-height: 72px; }
    .tt-sidebar { display: grid; grid-template-columns: 1fr; }
    .tt-article-main { padding: 26px 20px 34px; }
}

    .tt-body {
        background: var(--tt-bg);
        color: var(--tt-ink);
        font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    }

    .tt-shell {
        width: min(1180px, calc(100vw - 32px));
        margin: 0 auto;
    }

    .tt-header {
        position: sticky;
        top: 0;
        z-index: 50;
        background: rgba(255, 255, 255, .96);
        border-bottom: 1px solid var(--tt-line);
        backdrop-filter: blur(12px);
    }

    .tt-header-row {
        display: flex;
        align-items: center;
        gap: 22px;
        min-height: 64px;
    }

    .tt-brand {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        color: var(--tt-ink);
        font-size: 24px;
        font-weight: 850;
        letter-spacing: -0.04em;
        white-space: nowrap;
    }

    .tt-brand-mark {
        width: 10px;
        height: 28px;
        border-radius: 999px;
        background: linear-gradient(180deg, var(--tt-red), #ff7b5f);
    }

    .tt-topnav {
        display: flex;
        align-items: center;
        gap: 18px;
        color: #4b5563;
        font-weight: 650;
    }

    .tt-topnav a {
        padding: 22px 0 18px;
        border-bottom: 3px solid transparent;
    }

    .tt-topnav a:hover,
    .tt-topnav a.is-active {
        color: var(--tt-red);
        border-bottom-color: var(--tt-red);
    }

    .tt-search {
        margin-left: auto;
        display: flex;
        align-items: center;
        width: min(320px, 32vw);
        border: 1px solid var(--tt-line);
        background: #f8fafc;
        border-radius: 999px;
        overflow: hidden;
    }

    .tt-search input {
        min-width: 0;
        flex: 1;
        background: transparent;
        padding: 10px 4px 10px 16px;
        color: var(--tt-ink);
        outline: none;
    }

    .tt-search button {
        padding: 10px 14px;
        color: var(--tt-red);
    }

    .tt-mobile-menu {
        display: none;
        margin-left: auto;
        color: var(--tt-ink);
    }

    .tt-layout {
        display: grid;
        grid-template-columns: 148px minmax(0, 1fr) 292px;
        gap: 18px;
        padding: 22px 0 34px;
        align-items: start;
    }

    .tt-channel-rail {
        position: sticky;
        top: 84px;
        display: grid;
        gap: 4px;
        padding: 8px;
        background: var(--tt-card);
        border: 1px solid var(--tt-line);
        border-radius: 18px;
        box-shadow: 0 12px 30px rgba(15, 23, 42, .05);
    }

    .tt-channel {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 8px;
        padding: 11px 12px;
        border-radius: 12px;
        color: #4b5563;
        font-weight: 700;
    }

    .tt-channel:hover,
    .tt-channel.is-active {
        background: var(--tt-soft);
        color: var(--tt-red);
    }

    .tt-feed {
        display: grid;
        gap: 12px;
    }

    .tt-breaking {
        display: flex;
        gap: 12px;
        align-items: center;
        padding: 12px 16px;
        background: #fff;
        border: 1px solid var(--tt-line);
        border-radius: 16px;
        color: var(--tt-muted);
        font-weight: 650;
    }

    .tt-breaking strong {
        color: var(--tt-red);
    }

    .tt-feed-card,
    .tt-panel,
    .tt-article-card {
        background: var(--tt-card);
        border: 1px solid var(--tt-line);
        border-radius: 16px;
        box-shadow: 0 12px 30px rgba(15, 23, 42, .045);
    }

    .tt-feed-card {
        padding: 22px 24px;
    }

    .tt-section-title {
        display: flex;
        align-items: center;
        justify-content: flex-start;
        margin-bottom: 12px;
        font-size: 18px;
        font-weight: 850;
        letter-spacing: -0.02em;
    }

    .tt-section-title::before {
        content: "";
        display: inline-block;
        width: 4px;
        height: 18px;
        margin-right: 9px;
        border-radius: 999px;
        background: var(--tt-red);
    }

    .tt-title-row {
        display: flex;
        align-items: center;
        justify-content: flex-start;
        text-align: left;
    }

    .tt-home-conversion {
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        gap: 18px;
        align-items: center;
        padding: 20px 22px;
        border: 1px solid rgba(240, 65, 66, .22);
        border-radius: 18px;
        background: linear-gradient(135deg, #fff4f4 0%, #ffffff 58%, #f8fafc 100%);
        box-shadow: 0 14px 32px rgba(240, 65, 66, .08);
    }

    .tt-home-conversion-kicker {
        display: inline-flex;
        align-items: center;
        margin-bottom: 7px;
        color: var(--tt-red);
        font-size: 13px;
        font-weight: 850;
    }

    .tt-home-conversion h2 {
        margin: 0;
        color: var(--tt-ink);
        font-size: 22px;
        font-weight: 900;
        letter-spacing: -0.03em;
        line-height: 1.3;
    }

    .tt-home-conversion p {
        margin: 8px 0 0;
        color: #5f6673;
        font-size: 14px;
        line-height: 1.8;
    }

    .tt-home-conversion-actions {
        display: flex;
        flex-wrap: wrap;
        justify-content: flex-end;
        gap: 10px;
        min-width: 224px;
    }

    .tt-home-conversion-primary,
    .tt-home-conversion-secondary {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-height: 42px;
        padding: 0 16px;
        border-radius: 999px;
        font-weight: 850;
    }

    .tt-home-conversion-primary {
        color: #fff !important;
        background: var(--tt-red);
        box-shadow: 0 10px 22px rgba(240, 65, 66, .2);
    }

    .tt-home-conversion-secondary {
        color: var(--tt-red) !important;
        border: 1px solid rgba(240, 65, 66, .25);
        background: #fff;
    }

    .tt-article-conversion {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 18px;
        margin: 24px 0 30px;
        padding: 18px 20px;
        border: 1px solid rgba(240, 65, 66, .18);
        border-radius: 16px;
        background: linear-gradient(135deg, #fff7f6 0%, #ffffff 70%);
    }

    .tt-article-conversion span {
        display: block;
        margin-bottom: 5px;
        color: var(--tt-red);
        font-size: 12px;
        font-weight: 850;
        letter-spacing: .03em;
    }

    .tt-article-conversion strong {
        display: block;
        color: #283142;
        font-size: 15px;
        line-height: 1.7;
    }

    .tt-article-conversion-actions {
        display: flex;
        flex: 0 0 auto;
        flex-wrap: wrap;
        justify-content: flex-end;
        gap: 10px;
    }

    .tt-article-conversion-actions a {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-height: 38px;
        padding: 0 13px;
        border-radius: 999px;
        color: var(--tt-red) !important;
        border: 1px solid rgba(240, 65, 66, .22);
        background: #fff;
        font-size: 13px;
        font-weight: 850;
    }

    .tt-article-conversion-actions a:first-child {
        color: #fff !important;
        background: var(--tt-red);
    }

    .tt-article-mid-conversion {
        margin: 34px 0;
        padding: 24px 26px;
        border: 1px solid rgba(240, 65, 66, .2);
        border-left: 5px solid var(--tt-red);
        border-radius: 18px;
        background:
            radial-gradient(circle at 10% 20%, rgba(240, 65, 66, .08), transparent 26%),
            linear-gradient(135deg, #fffaf9 0%, #ffffff 58%, #f8fafc 100%);
        box-shadow: 0 16px 36px rgba(15, 23, 42, .06);
    }

    .tt-article-mid-conversion span {
        display: inline-flex;
        align-items: center;
        margin-bottom: 9px;
        color: var(--tt-red);
        font-size: 12px;
        font-weight: 900;
        letter-spacing: .06em;
    }

    .tt-article-mid-conversion h2 {
        margin: 0;
        color: #1f2937;
        font-size: 22px;
        font-weight: 900;
        line-height: 1.35;
        letter-spacing: -0.03em;
    }

    .tt-article-mid-conversion p {
        margin: 10px 0 0;
        max-width: 720px;
        color: #4b5563;
        font-size: 15px;
        line-height: 1.85;
    }

    .tt-article-mid-conversion-actions {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        margin-top: 18px;
    }

    .tt-article-mid-conversion-actions a {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-height: 40px;
        padding: 0 15px;
        border-radius: 999px;
        color: var(--tt-red) !important;
        border: 1px solid rgba(240, 65, 66, .24);
        background: #fff;
        font-size: 14px;
        font-weight: 850;
    }

    .tt-article-mid-conversion-actions a:first-child {
        color: #fff !important;
        background: var(--tt-red);
        box-shadow: 0 10px 22px rgba(240, 65, 66, .18);
    }

    @media (max-width: 820px) {
        .tt-home-conversion {
            display: block;
            padding: 18px 18px;
        }

        .tt-home-conversion h2 {
            font-size: 19px;
        }

        .tt-home-conversion-actions {
            justify-content: stretch;
            margin-top: 14px;
            min-width: 0;
        }

        .tt-home-conversion-primary,
        .tt-home-conversion-secondary {
            flex: 1 1 140px;
        }

        .tt-article-conversion {
            display: block;
        }

        .tt-article-conversion-actions {
            justify-content: stretch;
            margin-top: 13px;
        }

        .tt-article-conversion-actions a {
            flex: 1 1 130px;
        }

        .tt-article-mid-conversion {
            padding: 21px 20px;
        }

        .tt-article-mid-conversion h2 {
            font-size: 20px;
        }

        .tt-article-mid-conversion-actions a {
            flex: 1 1 140px;
        }
    }

    .tt-card-meta {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 9px;
        color: var(--tt-muted);
        font-size: 13px;
        font-weight: 650;
    }

    .tt-pill {
        display: inline-flex;
        align-items: center;
        padding: 4px 9px;
        border-radius: 999px;
        background: var(--tt-soft);
        color: var(--tt-red);
        font-size: 12px;
        font-weight: 750;
    }

    .tt-article-card {
        display: grid;
        grid-template-columns: minmax(0, 1fr) 142px;
        gap: 18px;
        padding: 18px;
        transition: transform .18s ease, box-shadow .18s ease;
    }

    .tt-article-card:hover {
        transform: translateY(-1px);
        box-shadow: 0 18px 42px rgba(15, 23, 42, .07);
    }

    .tt-article-title {
        margin-top: 10px;
        color: #111827;
        font-size: 22px;
        line-height: 1.28;
        font-weight: 850;
        letter-spacing: -0.03em;
    }

    .tt-article-title a:hover {
        color: var(--tt-red);
    }

    .tt-article-summary {
        margin-top: 10px;
        color: #626a77;
        font-size: 15px;
        line-height: 1.75;
    }

    .tt-card-action {
        display: inline-flex;
        align-items: center;
        gap: 5px;
        margin-top: 14px;
        color: var(--tt-red);
        font-weight: 800;
    }

    .tt-thumb {
        min-height: 104px;
        border-radius: 14px;
        background:
            radial-gradient(circle at 72% 24%, rgba(240, 65, 66, .22), transparent 34%),
            linear-gradient(135deg, #fff3f3, #eef2ff);
        border: 1px solid #f1e3e4;
        display: grid;
        place-items: center;
        color: var(--tt-red);
        font-size: 32px;
        font-weight: 900;
    }

    .tt-sidebar {
        position: sticky;
        top: 84px;
        display: grid;
        gap: 14px;
    }

    .tt-panel {
        padding: 18px;
    }

    .tt-hot-list {
        display: grid;
        gap: 14px;
    }

    .tt-hot-item {
        display: grid;
        grid-template-columns: 24px minmax(0, 1fr);
        gap: 10px;
        align-items: start;
        color: #374151;
        font-size: 14px;
        line-height: 1.5;
        font-weight: 700;
    }

    .tt-hot-index {
        display: inline-grid;
        place-items: center;
        width: 22px;
        height: 22px;
        border-radius: 7px;
        background: #f1f5f9;
        color: #64748b;
        font-size: 12px;
        font-weight: 900;
    }

    .tt-hot-item:nth-child(-n+3) .tt-hot-index {
        background: var(--tt-red);
        color: #fff;
    }

    .tt-page-head {
        padding: 26px 28px;
        background:
            radial-gradient(circle at top right, rgba(240, 65, 66, .1), transparent 36%),
            #fff;
        border: 1px solid var(--tt-line);
        border-radius: 18px;
        box-shadow: 0 12px 30px rgba(15, 23, 42, .045);
    }

    .tt-page-kicker {
        margin-bottom: 8px;
        color: var(--tt-red);
        font-size: 13px;
        font-weight: 850;
        letter-spacing: .08em;
        text-transform: uppercase;
    }

    .tt-page-title {
        color: #111827;
        font-size: clamp(34px, 5vw, 56px);
        line-height: 1.08;
        font-weight: 900;
        letter-spacing: -0.06em;
    }

    .tt-page-desc {
        margin-top: 12px;
        color: #5f6876;
        font-size: 17px;
        line-height: 1.8;
    }

    .tt-article-layout {
        display: grid;
        grid-template-columns: minmax(0, 1fr) 300px;
        gap: 20px;
        padding: 22px 0 34px;
    }

    .tt-article-main {
        background: #fff;
        border: 1px solid var(--tt-line);
        border-radius: 20px;
        padding: clamp(24px, 5vw, 54px);
        box-shadow: 0 14px 34px rgba(15, 23, 42, .045);
    }

    .tt-article-h1 {
        color: #111827;
        font-size: clamp(32px, 5vw, 52px);
        line-height: 1.12;
        font-weight: 920;
        letter-spacing: -0.06em;
    }

    .tt-prose {
        margin-top: 28px;
        color: #263241;
        font-size: 18px;
        line-height: 1.95;
    }

    .tt-prose h2,
    .tt-prose h3 {
        margin: 2em 0 .8em;
        color: #111827;
        font-weight: 900;
        letter-spacing: -0.04em;
    }

    .tt-prose h2 {
        font-size: 1.65em;
        border-left: 4px solid var(--tt-red);
        padding-left: 12px;
    }

    .tt-prose h3 {
        font-size: 1.28em;
    }

    .tt-prose p,
    .tt-prose ul,
    .tt-prose ol,
    .tt-prose table,
    .tt-prose blockquote {
        margin: 1.05em 0;
    }

    .tt-prose a {
        color: var(--tt-red);
        font-weight: 750;
    }

    .tt-prose img {
        width: 100%;
        border-radius: 18px;
        box-shadow: 0 14px 36px rgba(15, 23, 42, .1);
    }

    .tt-prose figcaption {
        display: none;
    }

    .tt-prose table {
        display: block;
        width: 100%;
        overflow-x: auto;
        border-collapse: collapse;
    }

    .tt-prose th,
    .tt-prose td {
        border: 1px solid #e5e7eb;
        padding: 10px 12px;
    }

    .tt-prose th {
        background: #f8fafc;
        font-weight: 850;
    }

    .tt-footer {
        border-top: 1px solid var(--tt-line);
        background: #fff;
    }

    .tt-footer-inner {
        padding: 28px 0;
        text-align: center;
        color: var(--tt-muted);
        font-size: 14px;
    }

    @media (max-width: 1080px) {
        .tt-layout {
            grid-template-columns: 132px minmax(0, 1fr);
        }

        .tt-sidebar {
            display: none;
        }
    }

    @media (max-width: 820px) {
        .tt-shell {
            width: min(100% - 20px, 1180px);
        }

        .tt-topnav,
        .tt-search {
            display: none;
        }

        .tt-mobile-menu {
            display: inline-flex;
        }

        .tt-layout,
        .tt-article-layout {
            display: block;
        }

        .tt-channel-rail {
            position: static;
            display: flex;
            overflow-x: auto;
            margin-bottom: 14px;
            border-radius: 16px;
        }

        .tt-channel {
            white-space: nowrap;
        }

        .tt-feed {
            gap: 10px;
        }

        .tt-article-card {
            grid-template-columns: 1fr;
        }

        .tt-thumb {
            min-height: 86px;
        }
    }

    /*
     * High-fidelity news portal pass:
     * flatter white canvas, compact channel rail, feed rows with separators,
     * and a right-side hot board closer to Toutiao's public information layout.
     */
    .tt-body {
        background: #fff;
    }

    .tt-main {
        background: #fff;
    }

    .tt-shell {
        width: min(1170px, calc(100vw - 32px));
    }

    .tt-header {
        background: #fff;
        box-shadow: none;
    }

    .tt-header-row {
        min-height: 58px;
        gap: 24px;
    }

    .tt-brand {
        min-width: 128px;
        color: #222;
        font-size: 26px;
        font-weight: 900;
    }

    .tt-brand-mark {
        width: 32px;
        height: 32px;
        border-radius: 9px;
        background: var(--tt-red);
        box-shadow: inset 0 -7px 14px rgba(0, 0, 0, .08);
    }

    .tt-topnav {
        gap: 20px;
        color: #555;
        font-size: 15px;
    }

    .tt-topnav a {
        padding: 19px 0 16px;
        border-bottom-width: 2px;
        font-weight: 600;
    }

    .tt-search {
        width: 330px;
        height: 40px;
        border-color: #e8e8e8;
        background: #f5f6f7;
        border-radius: 4px;
    }

    .tt-search input {
        padding-left: 14px;
        font-size: 14px;
    }

    .tt-search button {
        min-width: 46px;
        background: var(--tt-red);
        color: #fff;
    }

    .tt-layout {
        grid-template-columns: 110px minmax(0, 650px) 320px;
        gap: 24px;
        padding-top: 18px;
    }

    .tt-channel-rail {
        top: 76px;
        gap: 2px;
        padding: 0;
        border: 0;
        border-radius: 0;
        background: transparent;
        box-shadow: none;
    }

    .tt-channel {
        height: 40px;
        justify-content: flex-start;
        padding: 0 12px;
        border-radius: 4px;
        color: #444;
        font-size: 16px;
        font-weight: 500;
    }

    .tt-channel small {
        display: none;
    }

    .tt-channel:hover {
        background: #f7f8fa;
        color: var(--tt-red);
    }

    .tt-channel.is-active {
        background: var(--tt-red);
        color: #fff;
        font-weight: 700;
    }

    .tt-feed {
        gap: 0;
        border-left: 1px solid #f2f2f2;
        border-right: 1px solid #f2f2f2;
        background: #fff;
    }

    .tt-page-head {
        padding: 20px 22px 18px;
        border: 0;
        border-bottom: 1px solid #f0f0f0;
        border-radius: 0;
        background: #fff;
        box-shadow: none;
    }

    .tt-page-kicker {
        margin-bottom: 6px;
        color: #999;
        font-size: 13px;
        font-weight: 500;
        letter-spacing: 0;
        text-transform: none;
    }

    .tt-page-title {
        font-size: 28px;
        line-height: 1.24;
        letter-spacing: -.02em;
        font-weight: 800;
    }

    .tt-page-desc {
        margin-top: 8px;
        color: #666;
        font-size: 14px;
        line-height: 1.7;
    }

    .tt-breaking {
        margin: 0;
        padding: 12px 22px;
        border: 0;
        border-bottom: 1px solid #f0f0f0;
        border-radius: 0;
        box-shadow: none;
        background: #fff;
        color: #444;
        font-size: 15px;
    }

    .tt-breaking strong {
        padding: 2px 7px;
        border-radius: 3px;
        background: var(--tt-red);
        color: #fff;
        font-size: 12px;
    }

    .tt-feed-card {
        padding: 0;
        border: 0;
        border-radius: 0;
        box-shadow: none;
    }

    .tt-section-title {
        margin: 0;
        padding: 14px 22px;
        border-bottom: 1px solid #f0f0f0;
        font-size: 18px;
        font-weight: 800;
    }

    .tt-section-title::before {
        width: 3px;
        height: 18px;
        margin-right: 1px;
        background: var(--tt-red);
    }

    .tt-article-card {
        grid-template-columns: minmax(0, 1fr) 156px;
        gap: 18px;
        padding: 18px 22px;
        border: 0;
        border-bottom: 1px solid #f0f0f0;
        border-radius: 0;
        box-shadow: none;
    }

    .tt-article-card:hover {
        transform: none;
        box-shadow: none;
        background: #fafafa;
    }

    .tt-card-meta {
        gap: 8px;
        color: #999;
        font-size: 13px;
        font-weight: 400;
    }

    .tt-pill {
        padding: 0;
        background: transparent;
        color: #999;
        font-size: 13px;
        font-weight: 400;
    }

    .tt-article-title {
        margin-top: 6px;
        font-size: 20px;
        line-height: 1.38;
        font-weight: 700;
        letter-spacing: 0;
    }

    .tt-article-summary {
        margin-top: 8px;
        color: #666;
        font-size: 14px;
        line-height: 1.7;
    }

    .tt-card-action {
        margin-top: 8px;
        color: #999;
        font-size: 13px;
        font-weight: 500;
    }

    .tt-card-action:hover {
        color: var(--tt-red);
    }

    .tt-thumb {
        min-height: 96px;
        border: 0;
        border-radius: 4px;
        background:
            linear-gradient(135deg, rgba(240, 65, 66, .78), rgba(255, 144, 84, .88)),
            linear-gradient(135deg, #fff3f3, #eef2ff);
        color: rgba(255, 255, 255, .94);
        font-size: 34px;
    }

    .tt-sidebar {
        top: 76px;
        gap: 16px;
    }

    .tt-panel {
        padding: 0;
        border: 0;
        border-radius: 0;
        background: #fff;
        box-shadow: none;
    }

    .tt-panel .tt-section-title {
        padding-left: 0;
        padding-right: 0;
    }

    .tt-hot-list {
        gap: 0;
    }

    .tt-hot-item {
        grid-template-columns: 24px minmax(0, 1fr);
        padding: 10px 0;
        border-bottom: 1px solid #f4f4f4;
        color: #333;
        font-size: 14px;
        font-weight: 500;
    }

    .tt-hot-index {
        background: transparent;
        color: #999;
        font-size: 15px;
    }

    .tt-hot-item:nth-child(1) .tt-hot-index {
        color: #f04142;
    }

    .tt-hot-item:nth-child(2) .tt-hot-index {
        color: #ff7a00;
    }

    .tt-hot-item:nth-child(3) .tt-hot-index {
        color: #ffb400;
    }

    .tt-article-layout {
        grid-template-columns: minmax(0, 720px) 320px;
        gap: 36px;
        padding-top: 28px;
    }

    .tt-article-main {
        padding: 0 0 40px;
        border: 0;
        border-radius: 0;
        box-shadow: none;
        background: #fff;
    }

    .tt-article-h1 {
        margin-top: 14px;
        font-size: 34px;
        line-height: 1.28;
        letter-spacing: 0;
        font-weight: 800;
    }

    .tt-article-main > .tt-card-meta {
        padding-bottom: 2px;
        color: #999;
    }

    .tt-prose {
        margin-top: 22px;
        color: #222;
        font-size: 17px;
        line-height: 1.95;
    }

    .tt-prose h2 {
        margin: 1.9em 0 .75em;
        padding-left: 10px;
        border-left: 3px solid var(--tt-red);
        font-size: 24px;
        letter-spacing: 0;
    }

    .tt-prose h3 {
        font-size: 20px;
        letter-spacing: 0;
    }

    .tt-prose img {
        border-radius: 4px;
        box-shadow: none;
    }

    .tt-prose blockquote {
        border-left: 4px solid #eee;
        padding-left: 16px;
        color: #555;
    }

    .tt-footer {
        margin-top: 20px;
    }

    @media (max-width: 1080px) {
        .tt-layout {
            grid-template-columns: 96px minmax(0, 1fr);
        }
    }

    @media (max-width: 820px) {
        .tt-layout,
        .tt-article-layout {
            display: block;
        }

        .tt-feed {
            border: 1px solid #f2f2f2;
        }

        .tt-channel-rail {
            display: flex;
            gap: 8px;
            padding-bottom: 12px;
            overflow-x: auto;
        }

        .tt-channel {
            height: 36px;
            white-space: nowrap;
        }

        .tt-article-card {
            grid-template-columns: 1fr;
        }
    }

    /*
     * Kami editorial refinement:
     * warm paper surface, ink-blue focus, fewer decorative red blocks, and
     * text-first feed rows when GEOFlow has no real cover image available.
     */
    :root {
        --tt-red: #1B365D;
        --tt-red-dark: #142946;
        --tt-ink: #141413;
        --tt-muted: #5e5d59;
        --tt-line: #e8e5da;
        --tt-bg: #f5f4ed;
        --tt-card: #faf9f5;
        --tt-soft: #EEF2F7;
    }

    .tt-body,
    .tt-main {
        background: var(--tt-bg);
    }

    .tt-header {
        background: rgba(250, 249, 245, .96);
        border-bottom-color: var(--tt-line);
    }

    .tt-brand {
        min-width: 132px;
        gap: 8px;
        font-size: 24px;
        letter-spacing: -0.035em;
    }

    .tt-brand-mark {
        width: 6px;
        height: 28px;
        border-radius: 999px;
        background: var(--tt-red);
        box-shadow: none;
    }

    .tt-topnav {
        color: #4d4c48;
    }

    .tt-topnav a:hover,
    .tt-topnav a.is-active {
        color: var(--tt-red);
        border-bottom-color: var(--tt-red);
    }

    .tt-search {
        width: 300px;
        border-color: var(--tt-line);
        background: #faf9f5;
        border-radius: 10px;
    }

    .tt-search button {
        min-width: 44px;
        background: var(--tt-red);
        color: #faf9f5;
    }

    .tt-layout {
        grid-template-columns: 116px minmax(0, 690px) 284px;
        gap: 22px;
        padding-top: 24px;
    }

    .tt-channel-rail {
        top: 82px;
        padding: 8px;
        border: 1px solid var(--tt-line);
        border-radius: 14px;
        background: var(--tt-card);
    }

    .tt-channel {
        height: 38px;
        padding: 0 12px;
        border-radius: 9px;
        color: #4d4c48;
        font-size: 15px;
    }

    .tt-channel:hover {
        background: #eef2f7;
        color: var(--tt-red);
    }

    .tt-channel.is-active {
        background: #eef2f7;
        color: var(--tt-red);
        font-weight: 700;
    }

    .tt-feed {
        gap: 14px;
        border: 0;
        background: transparent;
    }

    .tt-page-head,
    .tt-feed-card,
    .tt-panel {
        border: 1px solid var(--tt-line);
        border-radius: 16px;
        background: var(--tt-card);
    }

    .tt-page-head {
        padding: 26px 30px 24px;
        box-shadow: none;
    }

    .tt-page-kicker {
        color: #87867f;
        font-size: 13px;
        letter-spacing: .04em;
    }

    .tt-page-title {
        max-width: 13em;
        color: var(--tt-ink);
        font-size: clamp(30px, 3.2vw, 42px);
        line-height: 1.18;
        letter-spacing: -0.045em;
    }

    .tt-page-desc {
        max-width: 40em;
        color: var(--tt-muted);
        font-size: 15px;
        line-height: 1.62;
    }

    .tt-breaking {
        padding: 13px 18px;
        border: 1px solid var(--tt-line);
        border-radius: 14px;
        background: #faf9f5;
        color: #4d4c48;
    }

    .tt-breaking strong {
        background: #eef2f7;
        color: var(--tt-red);
        font-weight: 700;
    }

    .tt-feed-card {
        overflow: hidden;
        padding: 0;
    }

    .tt-section-title {
        padding: 16px 22px 14px;
        border-bottom-color: var(--tt-line);
        color: var(--tt-ink);
        font-size: 18px;
        font-weight: 700;
    }

    .tt-section-title::before {
        width: 3px;
        height: 18px;
        background: var(--tt-red);
    }

    .tt-article-card {
        grid-template-columns: 1fr;
        padding: 22px;
        border-bottom-color: var(--tt-line);
        background: transparent;
    }

    .tt-article-card:hover {
        background: #f7f6ef;
    }

    .tt-thumb {
        display: none;
    }

    .tt-card-meta,
    .tt-pill {
        color: #87867f;
        font-size: 13px;
    }

    .tt-pill {
        color: var(--tt-red);
        font-weight: 600;
    }

    .tt-article-title {
        max-width: 22em;
        margin-top: 7px;
        color: var(--tt-ink);
        font-size: 22px;
        line-height: 1.35;
        font-weight: 750;
        letter-spacing: -0.02em;
    }

    .tt-article-summary {
        max-width: 42em;
        color: var(--tt-muted);
        font-size: 15px;
        line-height: 1.62;
    }

    .tt-card-action {
        color: #87867f;
    }

    .tt-card-action:hover {
        color: var(--tt-red);
    }

    .tt-sidebar {
        top: 82px;
    }

    .tt-panel {
        padding: 0 18px 16px;
    }

    .tt-panel .tt-section-title {
        padding-left: 0;
        padding-right: 0;
    }

    .tt-hot-item {
        border-bottom-color: var(--tt-line);
        color: #3d3d3a;
        font-size: 14px;
        line-height: 1.55;
    }

    .tt-hot-index,
    .tt-hot-item:nth-child(1) .tt-hot-index,
    .tt-hot-item:nth-child(2) .tt-hot-index,
    .tt-hot-item:nth-child(3) .tt-hot-index {
        width: 22px;
        height: 22px;
        border-radius: 6px;
        background: #eef2f7;
        color: var(--tt-red);
        font-size: 12px;
        font-weight: 700;
    }

    .tt-footer {
        border-top-color: var(--tt-line);
        background: var(--tt-bg);
    }

    @media (max-width: 820px) {
        .tt-layout {
            padding-top: 14px;
        }

        .tt-channel-rail {
            padding: 8px;
            margin-bottom: 14px;
        }

        .tt-page-head {
            padding: 22px;
        }
    }

    /*
     * Grid alignment pass:
     * home/category use balanced 20/60/20 columns; article detail becomes a
     * single editorial reading column without side modules.
     */
    .tt-shell {
        width: min(1240px, calc(100vw - 48px));
    }

    .tt-layout {
        grid-template-columns: minmax(180px, 20%) minmax(0, 1fr) minmax(180px, 20%);
        gap: 24px;
        align-items: start;
    }

    .tt-brand {
        min-width: 180px;
    }

    .tt-search {
        width: min(360px, 28vw);
    }

    .tt-channel-rail,
    .tt-sidebar {
        width: 100%;
    }

    .tt-page-title {
        max-width: 15em;
    }

    .tt-article-layout {
        display: block;
        width: min(860px, calc(100vw - 48px));
        margin: 0 auto;
        padding: 42px 0 56px;
    }

    .tt-article-layout .tt-sidebar {
        display: none;
    }

    .tt-article-main {
        padding: 44px 56px 52px;
        border: 1px solid var(--tt-line);
        border-radius: 18px;
        background: var(--tt-card);
    }

    .tt-article-h1 {
        max-width: 16em;
        font-size: clamp(34px, 4vw, 48px);
        line-height: 1.16;
        letter-spacing: -0.04em;
    }

    .tt-prose {
        max-width: none;
        width: 100%;
        margin-left: 0;
        margin-right: 0;
    }

    @media (max-width: 1080px) {
        .tt-layout {
            grid-template-columns: 156px minmax(0, 1fr);
        }

        .tt-brand {
            min-width: 140px;
        }
    }

    @media (max-width: 820px) {
        .tt-shell,
        .tt-article-layout {
            width: min(100% - 20px, 1240px);
        }

        .tt-brand {
            min-width: auto;
        }

        .tt-article-main {
            padding: 28px 22px 34px;
        }
    }

    /*
     * Left rail detail pass: quieter border, softer active item, more breathing
     * room, and smaller typography so the rail reads as navigation rather than
     * a heavy card.
     */
    .tt-channel-rail {
        padding: 10px;
        border-color: #eeeadd;
        border-radius: 18px;
        background: rgba(250, 249, 245, .72);
        box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .42);
    }

    .tt-channel {
        height: 42px;
        padding: 0 14px;
        border-radius: 12px;
        color: #4d4c48;
        font-size: 14px;
        font-weight: 600;
        letter-spacing: -0.01em;
    }

    .tt-channel + .tt-channel {
        margin-top: 3px;
    }

    .tt-channel:hover {
        background: #f1f0e8;
    }

    .tt-channel.is-active {
        background: #EEF2F7;
        color: var(--tt-red);
        box-shadow: inset 3px 0 0 var(--tt-red);
    }

    @media (min-width: 1081px) {
        .tt-channel-rail {
            max-width: 170px;
        }
    }

    /*
     * Kami table-of-contents pass: the rail behaves like an editorial contents
     * block, not a button group. Focus is a thin ink-blue rule plus warm paper.
     */
    .tt-channel-rail {
        max-width: 178px;
        padding: 14px 10px;
        border: 1px solid #e8e5da;
        border-radius: 14px;
        background: #faf9f5;
        box-shadow: 0 10px 28px rgba(20, 20, 19, .035);
    }

    .tt-channel {
        position: relative;
        min-height: 36px;
        height: auto;
        padding: 8px 10px 8px 16px;
        border-left: 2.5px solid transparent;
        border-radius: 8px;
        color: #5e5d59;
        font-size: 13.5px;
        font-weight: 600;
        line-height: 1.35;
    }

    .tt-channel + .tt-channel {
        margin-top: 6px;
    }

    .tt-channel:hover {
        background: #f1f0e8;
        color: #3d3d3a;
    }

    .tt-channel.is-active {
        background: #EEF2F7;
        border-left-color: var(--tt-red);
        color: var(--tt-red);
        box-shadow: none;
    }

    /*
     * Final two-column home/category layout:
     * top navigation now owns channel switching, so page content starts near the
     * first nav item and keeps one consistent gutter to the recommendation rail.
     */
    .tt-layout {
        --tt-content-offset: 210px;
        width: calc(min(1240px, calc(100vw - 48px)) - var(--tt-content-offset));
        margin-left: calc((100vw - min(1240px, calc(100vw - 48px))) / 2 + var(--tt-content-offset));
        margin-right: auto;
        grid-template-columns: minmax(0, 1fr) 300px;
        gap: 22px;
    }

    .tt-feed,
    .tt-sidebar {
        min-width: 0;
    }

    .tt-page-head {
        padding: 24px 28px 22px;
    }

    .tt-page-title {
        max-width: 14em;
        font-size: clamp(30px, 3vw, 40px);
    }

    .tt-sidebar {
        top: 82px;
    }

    .tt-panel {
        border-radius: 14px;
    }

    @media (max-width: 1080px) {
        .tt-layout {
            width: min(100% - 32px, 900px);
            margin-left: auto;
            margin-right: auto;
            grid-template-columns: minmax(0, 1fr);
        }

        .tt-sidebar {
            display: none;
        }
    }

    @media (max-width: 820px) {
        .tt-layout {
            width: min(100% - 20px, 900px);
        }
    }

    /*
     * Unified container pass: header, two-column pages, and article detail now
     * share the same centered width so both edges align consistently.
     */
    .tt-shell {
        width: min(1364px, calc(100vw - 48px));
    }

    .tt-layout {
        width: min(1364px, calc(100vw - 48px));
        margin-left: auto;
        margin-right: auto;
        grid-template-columns: minmax(0, 1fr) 330px;
        gap: 24px;
    }

    .tt-article-layout {
        width: min(1364px, calc(100vw - 48px));
        margin-left: auto;
        margin-right: auto;
    }

    .tt-article-main {
        width: min(920px, 100%);
        margin-left: auto;
        margin-right: auto;
    }

    .tt-search {
        width: min(360px, 30vw);
    }

    @media (max-width: 1080px) {
        .tt-shell,
        .tt-layout,
        .tt-article-layout {
            width: min(100% - 32px, 980px);
        }
    }

    @media (max-width: 820px) {
        .tt-shell,
        .tt-layout,
        .tt-article-layout {
            width: min(100% - 20px, 980px);
        }
    }

    /*
     * Compact editorial container: all public pages use the same 1100px rhythm.
     * Search is intentionally hidden/removed for a calmer top bar.
     */
    .tt-shell,
    .tt-layout,
    .tt-article-layout {
        width: min(1100px, calc(100vw - 48px));
    }

    .tt-layout {
        grid-template-columns: minmax(0, 1fr) 300px;
        gap: 22px;
    }

    .tt-search {
        display: none;
    }

    .tt-header-row {
        justify-content: flex-start;
    }

    .tt-topnav {
        margin-left: 24px;
    }

    .tt-mobile-menu {
        margin-left: auto;
    }

    .tt-article-main {
        width: 100%;
    }

    @media (max-width: 1080px) {
        .tt-shell,
        .tt-layout,
        .tt-article-layout {
            width: min(100% - 32px, 980px);
        }
    }

    @media (max-width: 820px) {
        .tt-shell,
        .tt-layout,
        .tt-article-layout {
            width: min(100% - 20px, 980px);
        }

        .tt-topnav {
            margin-left: 0;
        }
    }

    .tt-breadcrumb {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        align-items: center;
        margin-bottom: 0;
        color: #87867f;
        font-size: 13px;
        line-height: 1.5;
    }

    .tt-breadcrumb a {
        color: #5e5d59;
        font-weight: 600;
    }

    .tt-breadcrumb a:hover {
        color: var(--tt-red);
    }

    .tt-breadcrumb span:last-child {
        max-width: 38em;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .tt-related-block {
        margin-top: 0;
        padding: 28px 56px 34px;
    }

    .tt-related-block .tt-section-title {
        padding: 0 0 16px;
        border-bottom: 0;
    }

    .tt-related-grid {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 12px 18px;
    }

    .tt-related-card {
        display: grid;
        grid-template-columns: 24px minmax(0, 1fr);
        gap: 10px;
        align-items: start;
        padding: 13px 0;
        border-bottom: 1px solid var(--tt-line);
        color: #3d3d3a;
        font-size: 15px;
        line-height: 1.55;
        font-weight: 600;
    }

    .tt-related-card:hover {
        color: var(--tt-red);
    }

    .tt-related-index {
        display: inline-grid;
        place-items: center;
        width: 22px;
        height: 22px;
        border-radius: 6px;
        background: #EEF2F7;
        color: var(--tt-red);
        font-size: 12px;
        font-weight: 700;
    }

    @media (max-width: 820px) {
        .tt-related-grid {
            grid-template-columns: 1fr;
        }

        .tt-breadcrumb span:last-child {
            max-width: 22em;
        }
    }

    .tt-article-layout {
        display: grid;
        gap: 18px;
    }

    .tt-article-module {
        border: 1px solid var(--tt-line);
        border-radius: 18px;
        background: var(--tt-card);
    }

    .tt-breadcrumb.tt-article-module {
        padding: 16px 22px;
    }

    .tt-article-main.tt-article-module {
        margin-left: 0;
        margin-right: 0;
    }

    @media (max-width: 820px) {
        .tt-related-block {
            padding: 24px 22px 28px;
        }
    }

    /*
     * Article page hard reset: keep article detail as a clean single-column
     * document flow. These rules intentionally sit last to avoid earlier
     * two-column/home overrides leaking into detail pages.
     */
    .tt-article-layout {
        display: flex;
        flex-direction: column;
        gap: 18px;
        width: min(1100px, calc(100vw - 48px));
        margin: 0 auto;
        padding: 34px 0 56px;
    }

    .tt-article-layout .tt-sidebar {
        display: none !important;
    }

    .tt-article-module,
    .tt-article-main.tt-article-module,
    .tt-related-block.tt-article-module {
        width: 100%;
        border: 1px solid var(--tt-line);
        border-radius: 18px;
        background: var(--tt-card);
        box-shadow: 0 10px 28px rgba(20, 20, 19, .025);
    }

    .tt-breadcrumb.tt-article-module {
        padding: 15px 22px;
    }

    .tt-article-main.tt-article-module {
        padding: 42px 56px 50px;
    }

    .tt-article-h1 {
        max-width: 100%;
        font-size: clamp(34px, 4.2vw, 54px);
        line-height: 1.13;
        letter-spacing: -0.045em;
    }

    .tt-article-main .tt-prose {
        max-width: none;
        width: 100%;
        font-size: 17px;
        line-height: 1.9;
    }

    .tt-related-block.tt-article-module {
        padding: 28px 56px 34px;
    }

    @media (max-width: 820px) {
        .tt-shell,
        .tt-layout,
        .tt-article-layout {
            width: min(100% - 20px, 1100px);
        }

        .tt-header-row {
            min-height: 56px;
        }

        .tt-brand {
            font-size: 21px;
        }

        .tt-topnav {
            display: none;
        }

        .tt-mobile-menu {
            display: inline-flex;
        }

        .tt-layout {
            grid-template-columns: 1fr;
            gap: 14px;
            padding-top: 16px;
        }

        .tt-sidebar {
            display: none;
        }

        .tt-page-head {
            padding: 22px 20px;
        }

        .tt-page-title {
            font-size: 30px;
            line-height: 1.18;
        }

        .tt-article-card {
            padding: 20px;
        }

        .tt-article-title {
            font-size: 21px;
        }

        .tt-article-layout {
            gap: 12px;
            padding: 16px 0 34px;
        }

        .tt-breadcrumb.tt-article-module {
            padding: 12px 16px;
            font-size: 12px;
        }

        .tt-article-main.tt-article-module {
            padding: 26px 20px 32px;
        }

        .tt-article-h1 {
            font-size: 34px;
            line-height: 1.16;
        }

        .tt-article-main .tt-prose {
            font-size: 16px;
            line-height: 1.82;
        }

        .tt-related-block.tt-article-module {
            padding: 24px 20px 28px;
        }
    }

    /*
     * List rows should be text-first when no real cover image is present.
     * Remove the reserved thumbnail column so title and summary align evenly
     * with the card padding on both sides.
     */
    .tt-feed .tt-article-card {
        grid-template-columns: minmax(0, 1fr) !important;
    }

    .tt-feed .tt-article-card > div {
        min-width: 0;
        width: 100%;
    }

    .tt-feed .tt-thumb {
        display: none !important;
    }

    .tt-feed .tt-article-title,
    .tt-feed .tt-article-summary {
        max-width: none;
        width: 100%;
    }

    .tt-hot-carousel {
        position: relative;
        display: grid;
        gap: 8px;
    }

    .tt-hot-carousel .tt-breaking {
        display: none;
    }

    .tt-hot-carousel .tt-breaking.is-active {
        display: flex;
    }

    .tt-hot-dots {
        display: flex;
        justify-content: flex-end;
        gap: 6px;
        padding-right: 4px;
    }

    .tt-hot-dots button {
        width: 7px;
        height: 7px;
        border-radius: 999px;
        background: #d8d6cf;
    }

    .tt-hot-dots button.is-active {
        width: 18px;
        background: var(--tt-red);
    }

    .tt-section-title::before {
        display: none !important;
    }

    /*
     * Article titles should feel editorial, not poster-sized. Keep the detail
     * page readable while avoiding oversized two-line headlines on desktop.
     */
    .tt-article-h1 {
        font-size: clamp(30px, 3vw, 40px) !important;
        line-height: 1.22 !important;
        letter-spacing: -0.03em;
    }

    @media (max-width: 768px) {
        .tt-article-h1 {
            font-size: 28px !important;
            line-height: 1.24 !important;
            letter-spacing: -0.02em;
        }
    }

    /*
     * Homepage poster + sidebar feed card. The main column now opens with an
     * optional configured visual slot, while the site introduction moves into
     * the right rail above the latest/hot list.
     */
    .tt-home-poster-carousel {
        position: relative;
        overflow: hidden;
        min-height: 220px;
        border: 1px solid var(--tt-line);
        border-radius: 18px;
        background: #ede9dc;
        box-shadow: 0 12px 30px rgba(20, 20, 19, .035);
    }

    .tt-home-poster-slide {
        display: none;
        position: relative;
        min-height: 220px;
        color: #fff;
    }

    .tt-home-poster-slide.is-active {
        display: block;
    }

    .tt-home-poster-slide img {
        display: block;
        width: 100%;
        height: 100%;
        min-height: 220px;
        aspect-ratio: 16 / 6.2;
        object-fit: cover;
    }

    .tt-home-poster-caption {
        position: absolute;
        left: 22px;
        bottom: 20px;
        max-width: min(520px, calc(100% - 44px));
        border-radius: 999px;
        background: rgba(17, 24, 39, .68);
        padding: 9px 14px;
        color: #fff;
        font-size: 15px;
        font-weight: 700;
        line-height: 1.35;
        backdrop-filter: blur(10px);
    }

    .tt-home-poster-dots {
        position: absolute;
        right: 18px;
        bottom: 16px;
        display: flex;
        gap: 7px;
        z-index: 2;
    }

    .tt-home-poster-dots button {
        width: 7px;
        height: 7px;
        border-radius: 999px;
        background: rgba(255, 255, 255, .62);
        box-shadow: 0 0 0 1px rgba(0, 0, 0, .08);
    }

    .tt-home-poster-dots button.is-active {
        width: 20px;
        background: #fff;
    }

    .tt-feed-panel {
        padding: 22px 20px 24px;
    }

    .tt-feed-panel-title {
        margin-top: 8px;
        color: var(--tt-ink);
        font-size: 26px;
        line-height: 1.15;
        font-weight: 850;
        letter-spacing: -0.045em;
    }

    .tt-feed-panel-desc {
        margin-top: 12px;
        color: var(--tt-muted);
        font-size: 14px;
        line-height: 1.7;
    }

    @media (max-width: 820px) {
        .tt-home-poster-carousel,
        .tt-home-poster-slide,
        .tt-home-poster-slide img {
            min-height: 168px;
        }

        .tt-home-poster-caption {
            left: 14px;
            bottom: 14px;
            max-width: calc(100% - 28px);
            border-radius: 14px;
            font-size: 13px;
        }
    }

    /*
     * Markdown table reset for article detail pages. The global theme table
     * rule used display:block for overflow handling, which made GFM tables keep
     * their intrinsic width and left a large blank area on the right. Keep the
     * scroll wrapper, but restore the table layout so columns fill the card.
     */
    .tt-prose .article-table-wrap {
        display: block;
        width: 100%;
        max-width: 100%;
        margin: 2rem auto;
        overflow-x: auto;
        overflow-y: hidden;
        border: 1px solid var(--tt-line);
        border-radius: 18px;
        background: #fff;
        box-shadow: 0 14px 34px rgba(20, 20, 19, .05);
    }

    .tt-prose .article-table {
        display: table !important;
        width: max(760px, 100%) !important;
        min-width: 100%;
        table-layout: auto;
        border-collapse: collapse;
        margin: 0;
        font-size: 15px;
        line-height: 1.72;
    }

    .tt-prose .article-table th,
    .tt-prose .article-table td {
        border-color: #e6e2d7;
        padding: 14px 16px;
        vertical-align: top;
        white-space: normal;
    }

    .tt-prose .article-table th {
        background: #f6f5ef;
        color: var(--tt-ink);
        font-weight: 800;
    }

    .tt-prose .article-table td {
        color: #354052;
    }

    /* Reader-to-product path: a restrained CTA after the article, not a floating ad. */
    .tt-topnav .tt-pricing-link,
    .tt-topnav .tt-beta-link {
        margin-left: 2px;
        padding: 8px 12px;
        border-radius: 5px;
        font-size: 13px;
        line-height: 1;
    }

    .tt-topnav .tt-pricing-link {
        border: 1px solid rgba(240, 65, 66, .28);
        color: var(--tt-red);
        background: #fff7f6;
    }

    .tt-topnav .tt-beta-link {
        border: 1px solid #e34d39;
        color: #fff;
        background: var(--tt-red);
    }

    .tt-topnav .tt-pricing-link:hover,
    .tt-topnav .tt-beta-link:hover {
        border-bottom-color: #c93f2e;
    }

    .tt-topnav .tt-pricing-link:hover {
        color: var(--tt-red);
        background: #ffe9e6;
    }

    .tt-topnav .tt-beta-link:hover {
        color: #fff;
        background: #c93f2e;
    }

    .tt-mobile-pricing-link {
        color: var(--tt-red) !important;
        background: #fff4f4;
    }

    .tt-mobile-beta-link {
        color: #fff !important;
        background: var(--tt-red);
    }

    .tt-beta-cta {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 24px;
        margin-top: 42px;
        padding: 26px 28px;
        border: 1px solid #f0cdc7;
        border-radius: 10px;
        background: #fff8f6;
    }

    .tt-beta-cta span {
        display: block;
        margin-bottom: 8px;
        color: var(--tt-red);
        font-size: 12px;
        font-weight: 800;
        letter-spacing: .06em;
    }

    .tt-beta-cta h2 {
        margin: 0;
        color: #1f2937;
        font-size: 22px;
        letter-spacing: 0;
    }

    .tt-beta-cta p {
        max-width: 630px;
        margin: 9px 0 0;
        color: #5f6875;
        font-size: 14px;
        line-height: 1.75;
    }

    .tt-beta-cta-actions {
        display: flex;
        flex: 0 0 auto;
        flex-wrap: wrap;
        gap: 10px;
    }

    .tt-beta-primary,
    .tt-beta-secondary {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 6px;
        min-height: 40px;
        padding: 0 14px;
        border: 1px solid transparent;
        border-radius: 5px;
        font-size: 14px;
        font-weight: 750;
        white-space: nowrap;
    }

    .tt-beta-primary { color: #fff !important; background: var(--tt-red); }
    .tt-beta-secondary { color: #374151 !important; border-color: #d3d8df; background: #fff; }

    @media (max-width: 820px) {
        .tt-beta-cta { display: block; padding: 22px 20px; }
        .tt-beta-cta h2 { font-size: 20px; }
        .tt-beta-cta-actions { margin-top: 18px; }
        .tt-beta-primary, .tt-beta-secondary { flex: 1 1 140px; }
    }

    @media (max-width: 820px) {
        .tt-prose .article-table-wrap {
            margin: 1.5rem auto;
            border-radius: 14px;
        }

        .tt-prose .article-table {
            width: max(640px, 100%) !important;
            font-size: 14px;
        }

        .tt-prose .article-table th,
        .tt-prose .article-table td {
            padding: 12px 14px;
        }
    }

    /*
     * Yudun editorial refinement: preserve the theme's document structure and
     * conversion data attributes while making the public reading experience a
     * restrained security publication rather than a generic media portal.
     */
    :root {
        --tt-red: #0f6b78;
        --tt-red-dark: #0b5863;
        --tt-ink: #142033;
        --tt-muted: #5f6e7f;
        --tt-line: #dbe3e8;
        --tt-bg: #f3f6f8;
        --tt-card: #ffffff;
        --tt-soft: #eaf5f3;
    }

    .tt-body {
        background: var(--tt-bg) !important;
        color: var(--tt-ink);
        font-family: Inter, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
    }

    .tt-header {
        border-bottom-color: var(--tt-line);
        box-shadow: 0 1px 0 rgba(15, 23, 42, .02);
    }

    .tt-header-row {
        min-height: 68px;
        gap: 18px;
    }

    .tt-brand {
        color: var(--tt-ink);
        font-size: 21px;
        letter-spacing: 0;
    }

    .tt-brand-mark {
        width: 8px;
        height: 24px;
        border-radius: 2px;
        background: var(--tt-red);
    }

    .tt-topnav {
        gap: 14px;
        color: #46566a;
        font-size: 14px;
    }

    .tt-topnav a {
        padding: 23px 0 19px;
        border-bottom-width: 2px;
    }

    .tt-topnav .tt-pricing-link,
    .tt-topnav .tt-beta-link {
        border-radius: 7px;
        padding: 8px 10px;
    }

    .tt-topnav .tt-pricing-link {
        border-color: #b9dbd5;
        color: #075b67;
        background: #f5fbfa;
    }

    .tt-topnav .tt-beta-link,
    .tt-beta-primary,
    .tt-article-conversion-actions a:first-child {
        border-color: var(--tt-red-dark);
        background: var(--tt-red);
    }

    .tt-topnav .tt-beta-link:hover,
    .tt-beta-primary:hover,
    .tt-article-conversion-actions a:first-child:hover {
        background: var(--tt-red-dark);
    }

    .tt-layout {
        gap: 16px;
        padding-top: 18px;
    }

    .tt-channel-rail,
    .tt-feed-card,
    .tt-panel,
    .tt-article-card {
        border-color: var(--tt-line);
        border-radius: 9px;
        box-shadow: 0 1px 2px rgba(15, 23, 42, .03), 0 8px 20px rgba(15, 23, 42, .03);
    }

    .tt-channel-rail {
        padding: 7px;
    }

    .tt-channel {
        border-radius: 6px;
        font-size: 14px;
    }

    .tt-channel:hover,
    .tt-channel.is-active {
        background: var(--tt-soft);
        color: #075b67;
    }

    .tt-page-head {
        border-color: var(--tt-line) !important;
        border-radius: 9px !important;
        background: #fbfcfc !important;
        box-shadow: none !important;
    }

    .tt-page-kicker,
    .tt-home-conversion-kicker,
    .tt-article-conversion span,
    .tt-beta-cta span {
        color: var(--tt-red) !important;
    }

    .tt-home-conversion,
    .tt-article-conversion,
    .tt-beta-cta {
        border-color: #c6e0db !important;
        border-radius: 9px;
        background: #f3faf8 !important;
        box-shadow: none !important;
    }

    .tt-home-conversion-actions,
    .tt-article-conversion-actions,
    .tt-beta-cta-actions {
        gap: 8px;
    }

    .tt-home-conversion-primary,
    .tt-home-conversion-secondary,
    .tt-article-conversion-actions a,
    .tt-beta-primary,
    .tt-beta-secondary {
        border-radius: 7px;
    }

    .tt-home-conversion-primary {
        background: var(--tt-red) !important;
    }

    .tt-home-conversion-secondary,
    .tt-article-conversion-actions a:not(:first-child),
    .tt-beta-secondary {
        border-color: #b9d9d3 !important;
        color: #075b67 !important;
        background: #fff !important;
    }

    .tt-section-title::before {
        width: 3px;
        border-radius: 1px;
        background: var(--tt-red);
    }

    .tt-breaking {
        border-color: var(--tt-line);
        border-radius: 8px;
    }

    .tt-breaking strong,
    .tt-prose a {
        color: var(--tt-red);
    }

    .tt-article-layout {
        gap: 18px;
    }

    .tt-article-main,
    .tt-related-block {
        border-color: var(--tt-line) !important;
        border-radius: 9px !important;
        box-shadow: 0 1px 2px rgba(15, 23, 42, .03), 0 10px 24px rgba(15, 23, 42, .035) !important;
    }

    .tt-card-meta {
        color: #687789;
        gap: 9px;
    }

    .tt-pill {
        border-radius: 999px;
        background: #eaf5f3;
        color: #075b67;
    }

    .tt-article-h1 {
        color: var(--tt-ink) !important;
        font-size: clamp(30px, 3vw, 40px) !important;
        line-height: 1.22 !important;
        letter-spacing: 0 !important;
    }

    .tt-prose {
        color: #344255;
        font-size: 17px;
        line-height: 1.9;
    }

    .tt-prose h2 {
        border-left-color: var(--tt-red);
        color: var(--tt-ink);
        letter-spacing: 0;
    }

    .tt-prose h3,
    .tt-prose strong {
        color: var(--tt-ink);
    }

    .tt-prose blockquote {
        border-left-color: #8fc9be;
        background: #f5fbfa;
    }

    .tt-prose .article-table-wrap {
        border-color: var(--tt-line);
        border-radius: 8px;
        box-shadow: none;
    }

    .tt-prose .article-table th {
        background: #f0f7f5;
    }

    .tt-footer {
        border-top-color: var(--tt-line);
        background: #ffffff;
    }

    .tt-footer-inner {
        color: #5f6e7f;
    }

    .tt-body :focus-visible {
        outline: 3px solid rgba(15, 107, 120, .30);
        outline-offset: 2px;
    }

    /* Disabled after visual QA: the experimental global overlay introduced inconsistent
       spacing and an overly stylized presentation. Retained only for an easy rollback. */
    @media not all {
    /* Homepage masthead: a clearly differentiated research index rather than a news feed. */
    .tt-page-head {
        position: relative;
        overflow: hidden;
        border: 1px solid #c8dadd !important;
        border-radius: 10px !important;
        padding: 0 !important;
        background: #f9fcfc !important;
        box-shadow: none !important;
    }

    .tt-home-command {
        display: grid;
        grid-template-columns: minmax(0, 1.45fr) minmax(280px, .82fr);
        align-items: stretch;
    }

    .tt-home-command-copy {
        padding: 34px 38px 31px;
        border-left: 5px solid var(--tt-red);
    }

    .tt-home-command .tt-page-kicker {
        color: #0a5c68;
        font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
        font-size: 12px;
        font-weight: 750;
        letter-spacing: .07em;
    }

    .tt-home-command .tt-page-title {
        max-width: 720px;
        margin: 14px 0 11px;
        color: #142033;
        font-size: clamp(30px, 3.4vw, 46px);
        line-height: 1.13;
        letter-spacing: 0;
    }

    .tt-home-command .tt-page-desc {
        max-width: 680px;
        color: #435267;
        font-size: 16px;
        line-height: 1.8;
    }

    .tt-home-command-boundary {
        margin: 18px 0 0;
        border-left: 2px solid #83c9bf;
        padding-left: 12px;
        color: #617186;
        font-size: 14px;
        line-height: 1.65;
    }

    .tt-home-signal-board {
        display: flex;
        flex-direction: column;
        justify-content: center;
        padding: 28px;
        color: #eaf9f7;
        background: #123244;
    }

    .tt-home-signal-head {
        margin-bottom: 16px;
        color: #8bdfd0;
        font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
        font-size: 11px;
        font-weight: 700;
        letter-spacing: .08em;
    }

    .tt-home-signal-dot {
        display: inline-block;
        width: 8px;
        height: 8px;
        margin-right: 8px;
        border-radius: 50%;
        background: #67d7c4;
        box-shadow: 0 0 0 0 rgba(103, 215, 196, .5);
        animation: tt-signal-pulse 2.4s ease-out infinite;
    }

    .tt-home-signal-row {
        display: grid;
        grid-template-columns: 28px 1fr;
        gap: 2px 9px;
        border-top: 1px solid rgba(211, 242, 237, .16);
        padding: 12px 0;
    }

    .tt-home-signal-row:last-child { border-bottom: 1px solid rgba(211, 242, 237, .16); }
    .tt-home-signal-row span { grid-row: span 2; color: #7fd1c3; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px; }
    .tt-home-signal-row b { color: #fff; font-size: 15px; }
    .tt-home-signal-row em { color: #bdd2d5; font-size: 13px; font-style: normal; line-height: 1.45; }

    @keyframes tt-signal-pulse {
        0% { box-shadow: 0 0 0 0 rgba(103, 215, 196, .55); }
        70% { box-shadow: 0 0 0 9px rgba(103, 215, 196, 0); }
        100% { box-shadow: 0 0 0 0 rgba(103, 215, 196, 0); }
    }

    @media (max-width: 820px) {
        .tt-header-row {
            min-height: 60px;
        }

        .tt-mobile-menu {
            color: var(--tt-ink);
        }

        .tt-channel-rail {
            border-radius: 8px;
            box-shadow: none;
        }

        .tt-page-head,
        .tt-feed-card,
        .tt-panel,
        .tt-article-main,
        .tt-related-block {
            border-radius: 8px !important;
        }

        .tt-article-main.tt-article-module {
            padding: 25px 19px 30px;
        }

        .tt-home-command { grid-template-columns: 1fr; }
        .tt-home-command-copy { padding: 25px 20px 23px; }
        .tt-home-signal-board { padding: 22px 20px; }
        .tt-home-command .tt-page-title { font-size: 29px; }

        .tt-article-h1 {
            font-size: 28px !important;
        }

        .tt-prose {
            font-size: 16px;
            line-height: 1.85;
        }

        .tt-home-conversion,
        .tt-article-conversion,
        .tt-beta-cta {
            padding: 18px;
        }
    }

    @media (prefers-reduced-motion: reduce) {
        .tt-home-signal-dot { animation: none; }
    }

    /* System-wide editorial pass: shared control, list and reading states. */
    .tt-body {
        --tt-ink: #142033;
        --tt-muted: #66758a;
        --tt-line: #d9e2e7;
        --tt-soft: #f2f7f6;
        background: #f7f9f9;
        color: var(--tt-ink);
        font-family: "PingFang SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
        font-variant-numeric: tabular-nums;
    }

    .tt-body::before {
        position: fixed;
        inset: 0;
        z-index: -1;
        content: "";
        pointer-events: none;
        opacity: .22;
        background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.11'/%3E%3C/svg%3E");
    }

    .tt-skip-link {
        position: fixed;
        top: 12px;
        left: 12px;
        z-index: 80;
        transform: translateY(-150%);
        border-radius: 6px;
        padding: 9px 12px;
        color: #fff;
        background: var(--tt-red);
        font-weight: 700;
        transition: transform 160ms ease;
    }

    .tt-skip-link:focus { transform: translateY(0); }

    .tt-header {
        border-bottom: 1px solid rgba(20, 32, 51, .10) !important;
        background: rgba(251, 252, 252, .96) !important;
        box-shadow: none !important;
        backdrop-filter: blur(12px);
    }

    .tt-header-row { min-height: 66px !important; }
    .tt-brand { color: var(--tt-ink) !important; font-weight: 800; letter-spacing: 0; }

    .tt-topnav {
        display: flex !important;
        flex: 1;
        align-items: center;
        justify-content: space-between;
        gap: 18px;
        margin-left: 36px;
    }

    .tt-topnav-main,
    .tt-topnav-actions {
        display: flex;
        align-items: center;
        gap: 18px;
    }

    .tt-topnav a {
        color: #536278 !important;
        font-size: 14px;
        font-weight: 650;
        letter-spacing: 0;
    }

    .tt-topnav a:hover,
    .tt-topnav a.is-active { color: var(--tt-red) !important; }
    .tt-official-link { color: #1d5a65 !important; }

    .tt-beta-link {
        display: inline-flex;
        align-items: center;
        min-height: 36px;
        border: 1px solid var(--tt-red) !important;
        border-radius: 6px !important;
        padding: 0 12px;
        color: #fff !important;
        background: var(--tt-red) !important;
        box-shadow: none !important;
    }

    .tt-beta-link:hover { background: #084f5a !important; transform: translateY(-1px); }
    .tt-main { padding-top: 30px; }
    .tt-layout { gap: 24px !important; }
    .tt-feed { gap: 14px; }

    .tt-channel-rail,
    .tt-sidebar .tt-panel,
    .tt-feed-card,
    .tt-article-main,
    .tt-breadcrumb {
        border-color: var(--tt-line) !important;
        border-radius: 8px !important;
        box-shadow: none !important;
        background: rgba(255, 255, 255, .97) !important;
    }

    .tt-channel-rail { padding: 8px !important; }
    .tt-channel { border-radius: 5px !important; color: #56667b !important; font-weight: 650; }
    .tt-channel:hover,
    .tt-channel.is-active { color: #075b67 !important; background: #e7f4f1 !important; }

    .tt-feed-card { padding: 22px !important; }
    .tt-section-title { border-bottom-color: var(--tt-line) !important; }
    .tt-title-row { color: var(--tt-ink) !important; font-size: 18px; font-weight: 800; letter-spacing: 0; }

    .tt-article-card {
        border: 1px solid var(--tt-line) !important;
        border-radius: 8px !important;
        padding: 21px !important;
        background: #fff !important;
        box-shadow: none !important;
        transition: border-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
    }

    .tt-article-card:hover {
        border-color: #97c7c0 !important;
        box-shadow: 0 14px 30px rgba(20, 32, 51, .08) !important;
        transform: translateY(-2px);
    }

    .tt-card-meta { color: var(--tt-muted) !important; font-size: 13px; }
    .tt-pill { border-radius: 5px !important; background: #e8f4f1 !important; color: #075b67 !important; font-weight: 700; }
    .tt-article-title { margin-top: 11px !important; line-height: 1.35 !important; letter-spacing: 0 !important; }
    .tt-article-title a { color: var(--tt-ink) !important; }
    .tt-article-title a:hover { color: var(--tt-red) !important; }
    .tt-article-summary { max-width: 68ch; color: #627186 !important; line-height: 1.75 !important; }
    .tt-card-action { color: #08707c !important; font-weight: 750; }
    .tt-thumb { border-radius: 7px !important; color: #e7f7f3 !important; background: #174355 !important; }

    .tt-sidebar { gap: 16px !important; }
    .tt-sidebar .tt-panel { padding: 19px !important; }
    .tt-feed-panel { border-left: 3px solid var(--tt-red) !important; }
    .tt-feed-panel-title { color: var(--tt-ink) !important; font-size: 21px !important; line-height: 1.3; letter-spacing: 0; }
    .tt-feed-panel-desc { color: var(--tt-muted) !important; line-height: 1.7; }
    .tt-hot-item { border-bottom-color: var(--tt-line) !important; color: #405168 !important; line-height: 1.55; }
    .tt-hot-item:hover { color: var(--tt-red) !important; }
    .tt-hot-index { color: #0d6976 !important; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }

    .tt-breadcrumb { padding: 14px 18px !important; color: var(--tt-muted) !important; }
    .tt-article-main { padding: 34px 42px 44px !important; }
    .tt-article-h1 { max-width: 900px; font-size: clamp(31px, 4vw, 48px) !important; line-height: 1.16 !important; text-wrap: balance; }
    .tt-prose { max-width: 76ch; color: #37485d !important; font-size: 17px; line-height: 1.9; }
    .tt-prose h2 { margin-top: 2.2em !important; padding-left: 14px; border-left: 3px solid var(--tt-red); font-size: 26px !important; line-height: 1.32 !important; letter-spacing: 0; }
    .tt-prose h3 { color: var(--tt-ink) !important; font-size: 20px !important; letter-spacing: 0; }
    .tt-prose a { color: #086d79; text-decoration-color: #92c9c1; text-underline-offset: 3px; }
    .tt-prose code { border-radius: 4px; color: #175663; background: #eaf4f3; }
    .tt-prose blockquote { border-left-width: 3px !important; border-radius: 0 7px 7px 0; color: #506175; }
    .tt-prose table { font-size: 15px; }
    .tt-prose th { color: var(--tt-ink) !important; background: #f1f7f5 !important; }
    .tt-prose td,
    .tt-prose th { border-color: var(--tt-line) !important; }

    .tt-home-conversion,
    .tt-article-conversion,
    .tt-beta-cta {
        border: 1px solid #b9d6d1 !important;
        border-radius: 8px !important;
        background: #edf7f5 !important;
        box-shadow: none !important;
    }

    .tt-home-conversion h2,
    .tt-article-conversion h2,
    .tt-beta-cta h2 { color: var(--tt-ink) !important; letter-spacing: 0; }
    .tt-home-conversion p,
    .tt-article-conversion p,
    .tt-beta-cta p { color: #526378 !important; line-height: 1.7; }
    .tt-home-conversion-actions { gap: 8px !important; }
    .tt-home-conversion-actions a { border-radius: 6px !important; box-shadow: none !important; }
    .tt-home-conversion-primary { background: var(--tt-red) !important; }

    .tt-search-input,
    .tt-search-form input,
    .tt-search-form select {
        border-color: #bdcbd3 !important;
        border-radius: 6px !important;
        background: #fff !important;
        box-shadow: none !important;
    }

    .tt-search-input:focus,
    .tt-search-form input:focus,
    .tt-search-form select:focus {
        border-color: var(--tt-red) !important;
        outline: 3px solid rgba(15, 107, 120, .16) !important;
        outline-offset: 1px;
    }

    .tt-footer { padding: 34px 0 !important; background: #f1f5f5 !important; }

    @media (max-width: 980px) {
        .tt-topnav { margin-left: 20px; gap: 12px; }
        .tt-topnav-main { gap: 13px; }
        .tt-topnav-actions { gap: 10px; }
        .tt-topnav-main a:nth-child(4) { display: none; }
    }

    @media (max-width: 760px) {
        .tt-header-row { min-height: 58px !important; }
        .tt-topnav { display: none !important; }
        .tt-main { padding-top: 18px; }
        .tt-layout { gap: 15px !important; }
        .tt-feed-card { padding: 15px !important; }
        .tt-article-card { padding: 17px !important; }
        .tt-article-main { padding: 26px 19px 32px !important; }
        .tt-prose { font-size: 16px; line-height: 1.85; }
        .tt-prose h2 { margin-top: 1.9em !important; font-size: 23px !important; }
        .tt-home-command-copy { border-left-width: 4px; }
    }

    }

/* Final visual precedence: one restrained publication system across all GEO pages. */
:root { --tt-red: #176672; --tt-red-dark: #104c55; --tt-ink: #17232d; --tt-muted: #62707c; --tt-line: #dce4e8; --tt-bg: #f6f8f8; --tt-card: #ffffff; --tt-soft: #eaf3f2; }
.tt-body { background: var(--tt-bg); color: var(--tt-ink); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; }
.tt-header { background: rgba(255, 255, 255, .97) !important; border-bottom: 1px solid var(--tt-line) !important; box-shadow: none !important; backdrop-filter: blur(10px); }
.tt-header-row { min-height: 68px !important; gap: 26px; }
.tt-brand { color: var(--tt-ink) !important; font-size: 21px !important; font-weight: 760 !important; letter-spacing: 0 !important; }
.tt-topnav { gap: 20px !important; color: #50606d !important; font-size: 14px; font-weight: 600; }
.tt-topnav a { padding: 23px 0 20px !important; border-bottom-width: 2px !important; }
.tt-topnav a:hover, .tt-topnav a.is-active { color: var(--tt-red) !important; }
.tt-beta-link, .tt-pricing-link { border-radius: 5px !important; box-shadow: none !important; }
.tt-topnav a.tt-beta-link {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    min-height: 36px !important;
    padding: 0 14px !important;
    color: #fff !important;
    font-size: 13px !important;
    line-height: 1 !important;
    white-space: nowrap !important;
}

/* Mobile navigation is a menu, not a clipped horizontal channel rail. */
#ttMobileNav.hidden { display: none !important; }
@media (max-width: 760px) {
    #ttMobileNav:not(.hidden) {
        display: block !important;
        padding: 0 0 14px !important;
    }

    #ttMobileNav:not(.hidden) .tt-channel-rail {
        position: static !important;
        display: grid !important;
        grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
        width: 100% !important;
        max-width: none !important;
        gap: 6px !important;
        overflow: visible !important;
        padding: 0 !important;
        border: 0 !important;
        background: transparent !important;
    }

    #ttMobileNav:not(.hidden) .tt-channel {
        display: flex !important;
        min-width: 0 !important;
        min-height: 42px !important;
        align-items: center !important;
        justify-content: center !important;
        padding: 8px 10px !important;
        border: 1px solid var(--tt-line) !important;
        border-radius: 4px !important;
        background: #fff !important;
        color: #40545d !important;
        font-size: 14px !important;
        font-weight: 680 !important;
        line-height: 1.3 !important;
        text-align: center !important;
        white-space: normal !important;
    }

    #ttMobileNav:not(.hidden) .tt-channel.tt-mobile-beta-link {
        grid-column: 1 / -1 !important;
        border-color: var(--tt-red) !important;
        background: var(--tt-red) !important;
        color: #fff !important;
    }
}

/* Article rhythm: compact the reading flow without changing article content. */
.tt-article-main > .tt-prose { margin-top: 22px !important; }
.tt-prose h2 { margin: 1.7em 0 .62em !important; }
.tt-prose h3 { margin: 1.45em 0 .52em !important; }
.tt-prose p,
.tt-prose ul,
.tt-prose ol,
.tt-prose table,
.tt-prose blockquote { margin: .82em 0 !important; }
@media (max-width: 760px) {
    .tt-article-main > .tt-prose { margin-top: 20px !important; }
    .tt-prose h2 { margin-top: 1.55em !important; }
}
.tt-main { padding-top: 28px !important; }
.tt-layout { grid-template-columns: minmax(0, 1fr) 286px !important; gap: 28px !important; padding-bottom: 48px !important; }
.tt-layout > .tt-channel-rail { display: none !important; }
.tt-feed { gap: 0 !important; }
.tt-page-head, .tt-feed-card, .tt-panel, .tt-article-card, .tt-article-main, .tt-related-block { border-color: var(--tt-line) !important; border-radius: 6px !important; box-shadow: none !important; }
.tt-page-head { padding: 32px 34px !important; background: #fff !important; }
.tt-page-kicker { color: var(--tt-red) !important; font-size: 12px !important; font-weight: 700 !important; letter-spacing: .06em !important; }
.tt-page-title { max-width: 820px; color: var(--tt-ink) !important; font-size: clamp(32px, 3.6vw, 44px) !important; line-height: 1.18 !important; font-weight: 760 !important; letter-spacing: 0 !important; }
.tt-page-desc { max-width: 760px; color: var(--tt-muted) !important; font-size: 16px !important; line-height: 1.8 !important; }
.tt-home-conversion { grid-template-columns: minmax(0, 1fr) auto !important; padding: 24px 28px !important; border: 1px solid #cddfdd !important; border-radius: 6px !important; background: #edf5f4 !important; box-shadow: none !important; }
.tt-home-conversion h2 { font-size: 21px !important; letter-spacing: 0 !important; }
.tt-home-conversion p { color: #566875 !important; }
.tt-home-conversion-actions { gap: 8px !important; }
.tt-home-conversion-primary, .tt-home-conversion-secondary { min-height: 40px !important; padding: 0 14px !important; border-radius: 5px !important; font-size: 14px !important; font-weight: 700 !important; box-shadow: none !important; }
.tt-home-conversion-primary { background: var(--tt-red) !important; }
.tt-home-conversion-secondary { border-color: #bcd4d0 !important; color: var(--tt-red) !important; }
.tt-feed-card { padding: 0 !important; overflow: hidden; background: #fff !important; }
.tt-section-title { min-height: 60px; margin: 0 !important; padding: 0 26px !important; border-bottom: 1px solid var(--tt-line); font-size: 17px !important; }
.tt-section-title::before { width: 3px !important; height: 16px !important; margin-right: 8px !important; border-radius: 0 !important; background: var(--tt-red) !important; }
.tt-article-card { grid-template-columns: minmax(0, 1fr) 130px !important; gap: 22px !important; padding: 25px 26px !important; border: 0 !important; border-bottom: 1px solid var(--tt-line) !important; border-radius: 0 !important; transition: background .16s ease !important; }
.tt-article-card:last-child { border-bottom: 0 !important; }
.tt-article-card:hover { transform: none !important; box-shadow: none !important; background: #f9fbfb !important; }
.tt-article-title { margin-top: 9px !important; color: var(--tt-ink) !important; font-size: 21px !important; line-height: 1.38 !important; font-weight: 740 !important; letter-spacing: 0 !important; }
.tt-article-title a:hover, .tt-card-action { color: var(--tt-red) !important; }
.tt-article-summary { max-width: 66ch; color: var(--tt-muted) !important; font-size: 15px !important; line-height: 1.76 !important; }
.tt-thumb { min-height: 96px !important; border: 1px solid #cddedb !important; border-radius: 5px !important; background: var(--tt-soft) !important; color: var(--tt-red) !important; }
.tt-pill { border-radius: 4px !important; background: var(--tt-soft) !important; color: var(--tt-red) !important; }
.tt-sidebar { top: 92px !important; gap: 18px !important; }
.tt-sidebar .tt-panel { padding: 20px !important; }
.tt-feed-panel { border-top: 3px solid var(--tt-red) !important; border-left: 1px solid var(--tt-line) !important; }
.tt-feed-panel-title { font-size: 20px !important; line-height: 1.4 !important; letter-spacing: 0 !important; }
.tt-feed-panel-desc, .tt-hot-item { color: #556673 !important; }
.tt-hot-list { gap: 0 !important; }
.tt-hot-item { padding: 12px 0 !important; border-bottom: 1px solid var(--tt-line) !important; font-weight: 600 !important; }
.tt-hot-item:last-child { border-bottom: 0 !important; }
.tt-hot-index, .tt-hot-item:nth-child(-n+3) .tt-hot-index { border-radius: 4px !important; background: var(--tt-soft) !important; color: var(--tt-red) !important; }
.tt-article-main { padding: clamp(28px, 4vw, 48px) !important; }
.tt-article-h1 { color: var(--tt-ink) !important; font-size: clamp(30px, 3.4vw, 42px) !important; line-height: 1.2 !important; letter-spacing: 0 !important; }
.tt-prose { max-width: 76ch; color: #354653 !important; font-size: 17px !important; line-height: 1.9 !important; }
.tt-prose h2 { color: var(--tt-ink) !important; border-left: 3px solid var(--tt-red) !important; padding-left: 12px !important; font-size: 25px !important; letter-spacing: 0 !important; }
.tt-prose h3 { color: var(--tt-ink) !important; letter-spacing: 0 !important; }
.tt-prose a { color: var(--tt-red) !important; }
.tt-prose blockquote { border-left-color: var(--tt-red) !important; border-radius: 0 !important; background: var(--tt-soft) !important; }
.tt-prose img { border-radius: 6px !important; box-shadow: none !important; }
.tt-footer { border-top-color: var(--tt-line) !important; background: #fff !important; }
@media (max-width: 920px) { .tt-layout { grid-template-columns: 1fr !important; } .tt-sidebar { position: static !important; grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 760px) { .tt-shell { width: min(100% - 28px, 1180px) !important; } .tt-header-row { min-height: 60px !important; } .tt-main { padding-top: 16px !important; } .tt-page-head { padding: 24px 20px !important; } .tt-page-title { font-size: 30px !important; } .tt-page-desc { font-size: 15px !important; } .tt-home-conversion { display: block !important; padding: 20px !important; } .tt-home-conversion-actions { justify-content: flex-start !important; margin-top: 16px !important; } .tt-article-card { grid-template-columns: 1fr !important; gap: 14px !important; padding: 20px !important; } .tt-thumb { min-height: 72px !important; } .tt-sidebar { display: grid !important; grid-template-columns: 1fr !important; } .tt-article-main { padding: 26px 20px 34px !important; } }

/* 2026-07-31 public reading system. This final layer deliberately removes the old portal/card treatment. */
:root { --tt-red: #0f6570 !important; --tt-red-dark: #0a4f58 !important; --tt-ink: #11242d !important; --tt-muted: #60717b !important; --tt-line: #d8e2e5 !important; --tt-bg: #f7f9fa !important; --tt-card: #fff !important; --tt-soft: #edf5f4 !important; }
.tt-header { background: rgba(255,255,255,.98) !important; border-bottom: 1px solid var(--tt-line) !important; backdrop-filter: blur(12px); }
.tt-header-row { min-height: 64px !important; gap: 22px !important; }
.tt-brand { flex: 0 0 auto; font-size: 19px !important; font-weight: 760 !important; }
.tt-topnav { flex: 1; justify-content: flex-end; gap: 18px !important; font-size: 13px !important; }
.tt-topnav a { padding: 21px 0 18px !important; color: #51616b !important; font-weight: 650 !important; }
.tt-topnav a:last-child { margin-left: 4px; padding: 8px 12px !important; border: 1px solid #a9c8c5 !important; border-radius: 3px !important; color: var(--tt-red) !important; }
.tt-topnav a:hover, .tt-topnav a.is-active { color: var(--tt-red) !important; }
.tt-main { padding-top: 42px !important; }
.tt-layout { grid-template-columns: minmax(0, 1fr) 252px !important; gap: 46px !important; align-items: start !important; }
.tt-page-head { padding: 0 0 32px !important; border: 0 !important; border-bottom: 1px solid var(--tt-line) !important; border-radius: 0 !important; background: transparent !important; }
.tt-page-kicker { color: var(--tt-red) !important; font-size: 12px !important; font-weight: 750 !important; letter-spacing: .07em !important; }
.tt-page-title { margin: 10px 0 14px !important; max-width: 760px !important; font-size: clamp(34px, 3.8vw, 52px) !important; line-height: 1.16 !important; font-weight: 760 !important; }
.tt-page-desc { max-width: 720px !important; font-size: 16px !important; line-height: 1.85 !important; }
.tt-home-poster-carousel { margin: 28px 0 0 !important; border-radius: 0 !important; box-shadow: none !important; }
.tt-home-poster-slide, .tt-home-poster-slide img { border-radius: 3px !important; }
.tt-hot-carousel { margin: 18px 0 0 !important; border-radius: 0 !important; background: transparent !important; border-top: 1px solid var(--tt-line) !important; border-bottom: 1px solid var(--tt-line) !important; }
.tt-breaking { min-height: 48px !important; padding: 0 !important; color: var(--tt-ink) !important; }
.tt-home-conversion { margin: 36px 0 46px !important; padding: 28px 0 !important; grid-template-columns: minmax(0, 1fr) auto !important; border: 0 !important; border-top: 2px solid var(--tt-red) !important; border-bottom: 1px solid var(--tt-line) !important; border-radius: 0 !important; background: transparent !important; }
.tt-home-conversion-kicker { color: var(--tt-red) !important; font-size: 12px !important; font-weight: 750 !important; letter-spacing: .06em !important; }
.tt-home-conversion h2 { margin: 8px 0 10px !important; max-width: 650px; font-size: 25px !important; line-height: 1.32 !important; }
.tt-home-conversion p { max-width: 680px; color: var(--tt-muted) !important; font-size: 15px !important; line-height: 1.8 !important; }
.tt-home-conversion-primary { min-height: 40px !important; padding: 0 14px !important; border-radius: 3px !important; background: var(--tt-red) !important; box-shadow: none !important; }
.tt-feed-card { margin-top: 34px !important; padding: 0 !important; overflow: visible !important; border: 0 !important; border-radius: 0 !important; background: transparent !important; }
.tt-section-title { min-height: 52px !important; padding: 0 !important; border-bottom: 1px solid var(--tt-line) !important; }
.tt-title-row { color: var(--tt-ink) !important; font-size: 19px !important; font-weight: 760 !important; }
.tt-section-title::before { height: 16px !important; width: 3px !important; margin-right: 9px !important; border-radius: 0 !important; background: var(--tt-red) !important; }
.tt-feed { gap: 0 !important; }
.tt-article-card { grid-template-columns: minmax(0, 1fr) 116px !important; gap: 28px !important; padding: 28px 0 !important; border: 0 !important; border-bottom: 1px solid var(--tt-line) !important; border-radius: 0 !important; background: transparent !important; }
.tt-article-card:hover { transform: none !important; box-shadow: none !important; background: transparent !important; }
.tt-card-meta { color: var(--tt-muted) !important; font-size: 12px !important; }
.tt-pill { border-radius: 2px !important; background: var(--tt-soft) !important; color: var(--tt-red) !important; }
.tt-article-title { margin-top: 10px !important; font-size: 22px !important; line-height: 1.36 !important; font-weight: 740 !important; }
.tt-article-title a { color: var(--tt-ink) !important; }
.tt-article-summary { max-width: 64ch !important; font-size: 15px !important; line-height: 1.78 !important; }
.tt-card-action { font-size: 13px !important; color: var(--tt-red) !important; font-weight: 720 !important; }
.tt-thumb { align-self: start !important; min-height: 88px !important; border: 1px solid #cbddda !important; border-radius: 2px !important; background: var(--tt-soft) !important; color: var(--tt-red) !important; }
.tt-sidebar { top: 94px !important; gap: 0 !important; }
.tt-sidebar .tt-panel { padding: 0 !important; border: 0 !important; border-top: 2px solid var(--tt-red) !important; border-radius: 0 !important; background: transparent !important; }
.tt-sidebar .tt-section-title { min-height: 48px !important; }
.tt-hot-list { gap: 0 !important; }
.tt-hot-item { padding: 13px 0 !important; border-bottom: 1px solid var(--tt-line) !important; color: #465963 !important; font-size: 14px !important; line-height: 1.56 !important; }
.tt-hot-index, .tt-hot-item:nth-child(-n+3) .tt-hot-index { border-radius: 2px !important; background: transparent !important; color: var(--tt-red) !important; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.tt-breadcrumb { padding: 0 0 16px !important; border: 0 !important; border-bottom: 1px solid var(--tt-line) !important; border-radius: 0 !important; background: transparent !important; }
.tt-article-main { margin-top: 26px !important; padding: 0 0 44px !important; border: 0 !important; border-radius: 0 !important; background: transparent !important; }
.tt-article-h1 { max-width: 820px !important; font-size: clamp(34px, 3.8vw, 48px) !important; line-height: 1.18 !important; }
.tt-article-meta { border-bottom: 1px solid var(--tt-line) !important; padding-bottom: 20px !important; }
.tt-prose { max-width: 72ch !important; color: #344851 !important; font-size: 17px !important; line-height: 1.92 !important; }
.tt-prose h2 { margin-top: 2.5em !important; padding-left: 12px !important; border-left: 3px solid var(--tt-red) !important; font-size: 26px !important; line-height: 1.32 !important; }
.tt-prose h3 { font-size: 20px !important; }
.tt-prose blockquote { border-left-color: var(--tt-red) !important; border-radius: 0 !important; background: #f1f6f5 !important; }
.tt-prose table { display: block !important; overflow-x: auto !important; width: 100% !important; font-size: 14px !important; border-collapse: collapse !important; }
.tt-prose th { background: #eef5f4 !important; }
.tt-article-conversion, .tt-beta-cta { padding: 24px 0 !important; border: 0 !important; border-top: 2px solid var(--tt-red) !important; border-bottom: 1px solid var(--tt-line) !important; border-radius: 0 !important; background: transparent !important; }

/* Article detail has no visible sidebar. Centre the reading measure instead
   of retaining a portal-width canvas with unused space on the right. */
.tt-article-layout { width: min(900px, calc(100% - 48px)) !important; }

/* Tables and code retain their own horizontal scroll, but must never widen
   the page itself on a phone. */
.tt-article-main,
.tt-article-main .tt-prose {
    min-width: 0 !important;
    overflow-x: clip;
}

.tt-article-main .article-table-wrap,
.tt-article-main pre {
    max-width: 100% !important;
    overflow-x: auto !important;
    overscroll-behavior-x: contain;
}

/* The visible menu glyph stays compact while the touch target reaches the
   same size as the other mobile actions. */
.tt-mobile-menu {
    align-items: center;
    justify-content: center;
    min-width: 44px !important;
    min-height: 44px !important;
}
.read-more-btn {
    min-height: 36px !important;
    padding: 7px 11px !important;
    border: 1px solid #bdd4d1 !important;
    border-radius: 4px !important;
    background: #fff !important;
    color: var(--tt-red) !important;
    font-size: 13px !important;
    font-weight: 720 !important;
    line-height: 1.2 !important;
}
.read-more-btn:hover {
    border-color: var(--tt-red) !important;
    background: var(--tt-soft) !important;
    color: var(--tt-red-dark) !important;
}
@media (max-width: 980px) { .tt-topnav { gap: 13px !important; } .tt-topnav a:nth-child(5) { display: none; } .tt-layout { grid-template-columns: 1fr !important; gap: 34px !important; } .tt-sidebar { position: static !important; } }
@media (max-width: 760px) { .tt-main { padding-top: 24px !important; } .tt-page-title { font-size: 32px !important; } .tt-home-conversion { display: block !important; padding: 22px 0 !important; } .tt-home-conversion-actions { margin-top: 18px !important; } .tt-article-card { grid-template-columns: 1fr !important; gap: 15px !important; padding: 23px 0 !important; } .tt-thumb { min-height: 72px !important; order: -1; } .tt-article-title { font-size: 20px !important; } .tt-sidebar { display: block !important; } .tt-article-main { margin-top: 20px !important; } .tt-article-h1 { font-size: 31px !important; } .tt-prose { font-size: 16px !important; line-height: 1.86 !important; } .tt-article-layout { width: min(100% - 28px, 900px) !important; } }

/* Keep the only filled header action readable after the editorial overrides. */
.tt-topnav a.tt-beta-link {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    min-height: 36px !important;
    padding: 0 14px !important;
    border: 1px solid var(--tt-red-dark) !important;
    border-radius: 3px !important;
    color: #fff !important;
    background: var(--tt-red) !important;
    font-size: 13px !important;
    line-height: 1 !important;
    white-space: nowrap !important;
}