:root {
    --bg: #0b1220;
    --bg-soft: #121b2f;
    --panel: rgba(16, 24, 40, 0.72);
    --panel-strong: rgba(16, 24, 40, 0.92);
    --card: rgba(255,255,255,0.05);
    --card-hover: rgba(255,255,255,0.09);
    --text: #eef4ff;
    --sub: #9daccc;
    --primary: #7c6cff;
    --primary-2: #4bc7ff;
    --accent: #ff7cb4;
    --border: rgba(255,255,255,0.11);
    --shadow: 0 18px 50px rgba(0,0,0,0.18);
    --ring: rgba(124, 108, 255, 0.22);
    --welcome-bg: radial-gradient(circle at center, rgba(75,199,255,0.09), transparent 34%), linear-gradient(180deg, #11192c, #0b1220);
}

html[data-theme="light"] {
    --bg: #eef4fb;
    --bg-soft: #f8fbff;
    --panel: rgba(255,255,255,0.78);
    --panel-strong: rgba(255,255,255,0.93);
    --card: rgba(21, 46, 88, 0.04);
    --card-hover: rgba(21, 46, 88, 0.08);
    --text: #152038;
    --sub: #60708f;
    --primary: #6c63ff;
    --primary-2: #1cb4ff;
    --accent: #ff5ea2;
    --border: rgba(19, 34, 63, 0.12);
    --shadow: 0 18px 40px rgba(52, 83, 140, 0.12);
    --ring: rgba(124, 108, 255, 0.18);
    --welcome-bg: radial-gradient(circle at center, rgba(108,99,255,0.10), transparent 34%), linear-gradient(180deg, #f4f8ff, #eaf2ff);
}

* { box-sizing: border-box; }
html, body {
    margin: 0;
    min-height: 100%;
    font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: linear-gradient(135deg, var(--bg), var(--bg-soft));
    color: var(--text);
}
body { overflow-x: hidden; }
button, input, a, video, audio { -webkit-tap-highlight-color: transparent; }
button:focus, input:focus, a:focus { outline: none; }
button::-moz-focus-inner { border: 0; }
button:focus-visible, input:focus-visible, a:focus-visible, .detail-content code:focus-visible {
    outline: 1px solid rgba(75, 199, 255, 0.32);
    outline-offset: 2px;
}
.hidden { display: none !important; }

.ambient {
    position: fixed;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}
.mesh {
    position: absolute;
    border-radius: 999px;
    filter: blur(14px);
    opacity: .22;
}
.mesh-a {
    width: 260px;
    height: 260px;
    top: -80px;
    left: -100px;
    background: radial-gradient(circle, rgba(75,199,255,.18), transparent 70%);
}
.mesh-b {
    width: 300px;
    height: 300px;
    right: -110px;
    bottom: -90px;
    background: radial-gradient(circle, rgba(124,108,255,.18), transparent 70%);
}

.shell {
    position: relative;
    z-index: 1;
    width: min(1240px, calc(100% - 28px));
    margin: 18px auto 40px;
}
.topbar {
    position: sticky;
    top: 12px;
    z-index: 20;
    display: flex;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 14px;
    border-radius: 20px;
    background: var(--panel);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
}
.topbar-left, .topbar-right { display: flex; align-items: center; gap: 10px; min-width: 0; }
.brand-wrap { min-width: 0; display:flex; align-items:center; }
.brand-button {
    appearance: none;
    border: 0;
    background: transparent;
    padding: 0;
    color: inherit;
    cursor: pointer;
    text-align: left;
}
.logo-dot {
    width: 12px; height: 12px; border-radius: 50%; flex: 0 0 auto;
    background: linear-gradient(135deg, var(--primary-2), var(--primary), var(--accent));
}
.brand { font-weight: 800; }
.brand-sub { color: var(--sub); font-size: .88rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 230px; }

.back-button, .ghost-button, .category-card, .list-item, .sidebar-nav-btn, .qq-top-btn {
    transition: transform .16s ease, background .16s ease, border-color .16s ease, box-shadow .16s ease;
}
.back-button, .ghost-button, .sidebar-nav-btn {
    border: 1px solid var(--border);
    background: var(--card);
    color: var(--text);
    padding: 10px 14px;
    border-radius: 14px;
    cursor: pointer;
}
.qq-top-btn {
    border: 1px solid rgba(124,108,255,.34);
    background: linear-gradient(135deg, rgba(124,108,255,.2), rgba(255,124,180,.12));
    color: var(--text);
    padding: 10px 14px;
    border-radius: 14px;
    cursor: pointer;
    text-decoration: none;
}
.back-button:hover, .ghost-button:hover, .category-card:hover, .list-item:hover, .sidebar-nav-btn:hover, .qq-top-btn:hover {
    transform: translateY(-1px);
    background: var(--card-hover);
    border-color: rgba(124,108,255,.34);
}

.main-grid {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 20px;
    margin-top: 20px;
}
.sidebar, .content-pane {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 24px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
}
.sidebar {
    padding: 22px;
    position: sticky;
    top: 96px;
    height: fit-content;
}
.sidebar-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 18px;
}
.sidebar-stats {
    display: grid;
    gap: 12px;
    margin-bottom: 18px;
}
.sidebar-stats-minimal { margin-bottom: 0; }
.stat-card {
    padding: 14px 16px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 18px;
}
.stat-label {
    color: var(--sub);
    font-size: .88rem;
    margin-bottom: 6px;
}
.stat-value {
    font-size: 1.03rem;
    font-weight: 700;
}
.search-input {
    width: 100%;
    border: 1px solid var(--border);
    background: rgba(255,255,255,0.04);
    color: var(--text);
    border-radius: 16px;
    padding: 12px 14px;
}
.sidebar-links {
    display: grid;
    gap: 10px;
}
.sidebar-nav-btn {
    width: 100%;
    text-align: left;
}

.content-pane {
    padding: 24px;
    min-height: 620px;
}
.view { display: none; }
.view.active { display: block; }
.hero {
    padding: 32px;
    border-radius: 28px;
    background: linear-gradient(135deg, rgba(124,108,255,.18), rgba(75,199,255,.12), rgba(255,124,180,.08));
    border: 1px solid rgba(124,108,255,.22);
    box-shadow: inset 0 1px 0 rgba(255,255,255,.06);
}
.hero-kicker {
    display: inline-block;
    padding: 8px 12px;
    border-radius: 999px;
    background: rgba(255,255,255,.08);
    color: var(--sub);
    margin-bottom: 12px;
}
.hero h1 { margin: 0 0 10px; font-size: clamp(2rem, 4vw, 3rem); }
.hero p { margin: 0; color: var(--sub); line-height: 1.7; }

.grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
    margin-top: 22px;
}
.card {
    border: 1px solid var(--border);
    background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
    color: var(--text);
    border-radius: 24px;
    padding: 24px;
    text-align: left;
    cursor: pointer;
    box-shadow: inset 0 1px 0 rgba(255,255,255,.05);
}
.card-icon { font-size: 2rem; margin-bottom: 12px; }
.card-title { font-size: 1.34rem; font-weight: 800; margin-bottom: 8px; }
.card-desc { color: var(--sub); line-height: 1.7; margin-bottom: 18px; }
.card-meta { color: var(--primary-2); font-weight: 700; }

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 16px;
}
.section-header h2 { margin: 0 0 8px; font-size: 1.8rem; }
.section-header p { margin: 0; color: var(--sub); }

.list-container {
    display: grid;
    gap: 12px;
}
.list-item {
    width: 100%;
    text-align: left;
    padding: 18px 18px;
    border-radius: 18px;
    border: 1px solid var(--border);
    background: rgba(255,255,255,.04);
    color: var(--text);
    cursor: pointer;
}
.list-item-title {
    font-size: 1.04rem;
    font-weight: 700;
    margin-bottom: 6px;
}
.list-item-sub {
    color: var(--sub);
    font-size: .92rem;
}

.detail-content {
    padding: 8px 4px 4px;
    line-height: 1.88;
    word-break: break-word;
}
.detail-content h1,
.detail-content h2,
.detail-content h3,
.detail-content h4,
.detail-content h5,
.detail-content h6 {
    margin: 1.2em 0 .55em;
    line-height: 1.35;
}
.detail-content p { margin: .8em 0; color: var(--text); }
.detail-content ul { padding-left: 1.4rem; }
.detail-content li { margin: .45em 0; }
.detail-content pre {
    background: linear-gradient(180deg, rgba(75,199,255,.12), rgba(124,108,255,.08));
    border: 1px solid rgba(75,199,255,.22);
    border-radius: 18px;
    padding: 16px;
    overflow: auto;
    box-shadow: inset 0 1px 0 rgba(255,255,255,.05);
}
html[data-theme="light"] .detail-content pre { background: linear-gradient(180deg, rgba(75,199,255,.14), rgba(108,99,255,.08)); }
.detail-content code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    background: rgba(75,199,255,.08);
    border: 1px solid rgba(75,199,255,.14);
    border-radius: 12px;
    padding: .08em .36em;
    color: #9edcff;
}
html[data-theme="light"] .detail-content code {
    color: #1e5f86;
    background: rgba(75,199,255,.08);
    border-color: rgba(75,199,255,.16);
}
.detail-content p code,
.detail-content li code,
.detail-content h1 code,
.detail-content h2 code,
.detail-content h3 code,
.detail-content h4 code,
.detail-content h5 code,
.detail-content h6 code,
.detail-content td code,
.detail-content blockquote code {
    display: inline;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    word-break: break-word;
    line-height: inherit;
    box-decoration-break: clone;
    -webkit-box-decoration-break: clone;
}
.detail-content pre code {
    background: transparent;
    border: 0;
    padding: 0;
    border-radius: 0;
    color: inherit;
}
.detail-content a {
    display: inline-block;
    position: relative;
    margin: 0 2px;
    padding: 1px 6px;
    border-radius: 999px;
    color: var(--primary-2);
    text-decoration: none;
    background: rgba(126,203,255,.05);
    border: 1px solid rgba(126,203,255,.18);
    transition: border-color .18s ease, background-color .18s ease, color .18s ease;
}
.detail-content a:hover,
.detail-content a:focus-visible {
    text-decoration: none;
    background: rgba(126,203,255,.09);
    border-color: rgba(126,203,255,.34);
    outline: 1px solid rgba(126,203,255,.20);
    outline-offset: 1px;
}
.inline-color {
    font-weight: 500;
}
.notice-modal {
    position: fixed;
    inset: 0;
    z-index: 60;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 18px;
    background: rgba(5, 10, 18, .44);
    backdrop-filter: blur(8px);
}
.notice-card {
    width: min(540px, 100%);
    padding: 24px;
    border-radius: 24px;
    border: 1px solid var(--border);
    background: var(--panel-strong);
    box-shadow: var(--shadow);
}
.notice-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 30px;
    padding: 0 12px;
    border-radius: 999px;
    background: rgba(126,203,255,.10);
    border: 1px solid rgba(126,203,255,.18);
    color: var(--primary-2);
    font-size: .88rem;
    margin-bottom: 12px;
}
.notice-title {
    margin: 0 0 10px;
    font-size: 1.5rem;
}
.notice-text {
    margin: 0;
    color: var(--sub);
    line-height: 1.8;
}
.notice-actions {
    display: flex;
    justify-content: flex-end;
    margin-top: 18px;
}
.media-block {
    margin: 16px 0;
    padding: 12px;
    border-radius: 20px;
    border: 1px solid var(--border);
    background: rgba(255,255,255,.03);
}
.media-block img, .media-block video { display: block; max-width: 100%; border-radius: 14px; }
.media-block audio { width: 100%; }
.loading, .empty, .notice {
    padding: 18px;
    border: 1px dashed var(--border);
    border-radius: 18px;
    color: var(--sub);
    background: rgba(255,255,255,.03);
}
.error { color: #ff8b8b; }

.reveal {
    opacity: 0;
    transform: translateY(10px);
    animation: revealUp .42s ease forwards;
}
@keyframes revealUp {
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 980px) {
    .main-grid { grid-template-columns: 1fr; }
    .sidebar { position: static; }
    .grid { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
    .shell { width: min(100% - 16px, 100%); margin-top: 10px; }
    .topbar {
        flex-direction: column;
        align-items: stretch;
    }
    .topbar-left, .topbar-right {
        width: 100%;
        flex-wrap: wrap;
    }
    .topbar-right > * {
        flex: 1 1 auto;
        text-align: center;
    }
    .content-pane { padding: 18px; min-height: auto; }
    .hero { padding: 24px; }
    .brand-sub { max-width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
    .reveal { opacity: 1; transform: none; }
}


.topbar {
    flex-direction: column;
    align-items: stretch;
    padding: 10px 12px;
    overflow: visible;
}
.topbar-main {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: center;
}
.topbar-extra {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows .22s ease, opacity .18s ease, margin-top .18s ease;
    opacity: 0;
    margin-top: 0;
}
.topbar-extra > * {
    min-height: 0;
    overflow: visible;
}
.topbar-expanded .topbar-extra {
    grid-template-rows: 1fr;
    opacity: 1;
    margin-top: 10px;
}
.topbar-chip-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}
.icon-button {
    border: 1px solid var(--border);
    background: var(--card);
    color: var(--text);
    width: 42px;
    height: 42px;
    border-radius: 14px;
    cursor: pointer;
}
.compact-header p { display: none; }
.compact-nav { padding: 9px 13px; }
.hero p { display: none; }
@media (max-width: 900px) {
    .topbar-main { align-items: flex-start; }
    .topbar-right { flex-wrap: wrap; justify-content: flex-end; }
}
@media (max-width: 700px) {
    .topbar-main, .topbar-left { flex-wrap: wrap; }
    .brand-sub { max-width: 100%; }
    .qq-top-btn, .ghost-button, .back-button, .icon-button { min-height: 42px; }
}

.topbar-extra-note { color: var(--sub); font-size: .92rem; padding: 4px 2px 2px; }

.topbar-extra-inner {
    display: grid;
    gap: 10px;
}
.topbar-search-wrap {
    display: grid;
    gap: 8px;
}
.topbar-search-label {
    color: var(--sub);
    font-size: .9rem;
}
.topbar-search-input {
    max-width: 420px;
    background: rgba(255,255,255,0.045);
}
.topbar-collapsed .topbar-search-wrap {
    pointer-events: none;
}
@media (max-width: 700px) {
    .topbar-search-input { max-width: 100%; }
}


.topbar-search-wrap {
    display: grid;
    gap: 8px;
}
.topbar-search-label {
    color: var(--sub);
    font-size: .9rem;
}
.topbar-search-count {
    color: var(--sub);
    font-size: .9rem;
    padding-left: 2px;
}
.list-item-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}
.list-arrow {
    color: var(--sub);
    flex: 0 0 auto;
}


.list-item-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}
.list-arrow {
    color: var(--sub);
    flex: 0 0 auto;
}
blockquote {
    margin: 1em 0;
    padding: 12px 16px;
    border-left: 4px solid rgba(126,203,255,.4);
    background: rgba(255,255,255,.04);
    border-radius: 12px;
    color: var(--sub);
}
.media-block iframe {
    width: 100%;
    min-height: 360px;
    border: 0;
    border-radius: 14px;
    background: rgba(0,0,0,.14);
}
.external-link-card {
    margin: 16px 0;
}
.external-link-card a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
}
.topbar-search-count {
    color: var(--sub);
    font-size: .9rem;
}
@media (max-width: 760px) {
    .media-block iframe { min-height: 220px; }
}


.skip-link {
    position: absolute;
    left: 12px;
    top: -48px;
    z-index: 40;
    padding: 10px 14px;
    border-radius: 12px;
    background: var(--panel-strong);
    color: var(--text);
    border: 1px solid var(--border);
    text-decoration: none;
}
.skip-link:focus {
    top: 12px;
}

.list-item-summary {
    color: var(--sub);
    margin-top: 8px;
    line-height: 1.55;
    text-align: left;
}

.list-item-meta {
    margin-top: 10px;
    color: var(--sub);
    font-size: .88rem;
    text-align: left;
}

.external-link-card {
    padding: 16px 18px;
    border-radius: 18px;
    border: 1px solid var(--border);
    background: var(--card);
    display: grid;
    gap: 8px;
}

.external-link-label {
    font-size: .85rem;
    color: var(--sub);
}

.external-link-card a {
    word-break: break-all;
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation: none !important;
        transition: none !important;
        scroll-behavior: auto !important;
    }
}