@font-face {
    font-family: "LXGWWenKaiMono";
    src: url("./fonts/LXGWWenKaiMono-Regular.ttf") format("truetype");
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

:root {
    --bg: #0b0f17;
    --panel: #0f172a;
    --panel2: #0b1220;
    --text: #e5e7eb;
    --muted: #a1a1aa;
    --border: rgba(255, 255, 255, .10);
    --focus: rgba(59, 130, 246, .55);
    --max: 1200px;
    --radius: 14px;

    /* Theme surfaces */
    --page-bg: radial-gradient(1200px 700px at 10% 0%, rgba(59, 130, 246, .12), transparent 60%),
        radial-gradient(900px 600px at 90% 10%, rgba(168, 85, 247, .10), transparent 55%),
        var(--bg);
    --header-bg: linear-gradient(to bottom, rgba(15, 23, 42, .75), rgba(15, 23, 42, .15));
    --nav-bg: rgba(11, 15, 23, .75);
    --surface-1: rgba(15, 23, 42, .45);
    --surface-2: rgba(15, 23, 42, .55);
    --surface-3: rgba(2, 6, 23, .25);
    --surface-4: rgba(2, 6, 23, .35);
    --surface-5: rgba(15, 23, 42, .35);
    --surface-6: rgba(15, 23, 42, .75);

    /* Typography */
    --app-font-family: "LXGWWenKaiMono", ui-sans-serif, system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;

    /* QR Code theme (可自定义) */
    --qr-size: 170px;
    --qr-foreground: #ffffff;
    --qr-background: #00000000;
    --qr-dots: dots; /* square | rounded | dots | classy | classy-rounded | extra-rounded */
    --qr-corners: extra-rounded; /* square | dot | extra-rounded */

    scroll-padding-top: 70px;
}

html {
    color-scheme: dark;
}

html[data-theme="light"] {
    color-scheme: light;

    --bg: #f8fafc;
    --panel: #ffffff;
    --panel2: #ffffff;
    --text: #0f172a;
    --muted: #475569;
    --border: rgba(15, 23, 42, .14);
    --focus: rgba(59, 130, 246, .35);

    --page-bg: radial-gradient(1200px 700px at 10% 0%, rgba(59, 130, 246, .10), transparent 60%),
        radial-gradient(900px 600px at 90% 10%, rgba(168, 85, 247, .08), transparent 55%),
        var(--bg);
    --header-bg: linear-gradient(to bottom, rgba(255, 255, 255, .92), rgba(255, 255, 255, .65));
    --nav-bg: rgba(248, 250, 252, .75);
    --surface-1: rgba(255, 255, 255, .82);
    --surface-2: rgba(255, 255, 255, .92);
    --surface-3: rgba(15, 23, 42, .03);
    --surface-4: rgba(15, 23, 42, .04);
    --surface-5: rgba(15, 23, 42, .04);
    --surface-6: rgba(255, 255, 255, .98);

    --qr-foreground: #0f172a;
    --qr-background: #ffffff;
}

:root[data-printing="1"] {
    --qr-foreground: #111827;
    --qr-background: #ffffff;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--scroll-offset);
}

/* Ensure section anchors appear at the top (below sticky nav) */
.section[id] {
    scroll-margin-top: var(--scroll-offset);
}

body {
    margin: 0;
    font-family: var(--app-font-family);
    color: var(--text);
    background: var(--page-bg);
    line-height: 1.75;
}

.container {
    max-width: var(--max);
    margin: 0 auto;
    padding: 0 16px;
}

.skip-link {
    position: absolute;
    left: 12px;
    top: 12px;
    padding: 10px 12px;
    border: 1px solid var(--border);
    background: var(--surface-6);
    border-radius: 10px;
    color: var(--text);
    transform: translateY(-150%);
    transition: transform .15s ease;
    z-index: 999;
}

.skip-link:focus {
    transform: translateY(0);
    outline: none;
    box-shadow: 0 0 0 4px var(--focus);
}

.site-header {
    padding: 28px 0 18px;
    border-bottom: 1px solid var(--border);
    background: var(--header-bg);
}

.header-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
}

.site-title {
    margin: 0;
    font-size: 28px;
    letter-spacing: .5px;
}

.site-subtitle {
    margin: 6px 0 0;
    color: var(--muted);
}

.header-meta dl {
    margin: 0;
    display: grid;
    grid-template-columns: repeat(3, auto);
    gap: 8px;
}

.header-meta dt {
    color: var(--muted);
    font-size: 12px;
}

.header-meta dd {
    margin: 0;
}

.site-nav {
    position: sticky;
    top: 0;
    z-index: 50;
    border-bottom: 1px solid var(--border);
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
}

.nav-shell {
    padding: 10px 16px;
}

.nav-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    cursor: pointer;
    color: var(--text);
    border: 1px solid var(--border);
    background: var(--surface-2);
    padding: 10px 12px;
    border-radius: 10px;
    font: inherit;
}

.nav-toggle:hover {
    background: var(--surface-6);
}

.nav-toggle:focus {
    outline: none;
    box-shadow: 0 0 0 4px var(--focus);
}

.nav-toggle-icon {
    width: 10px;
    height: 10px;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: rotate(45deg) translateY(-1px);
    transition: transform .18s ease;
    flex: 0 0 auto;
}

.site-nav[data-open="true"] .nav-toggle-icon {
    transform: rotate(-135deg) translateY(-1px);
}

.nav-inner {
    display: none;
    margin-top: 10px;
    gap: 10px;
    overflow: visible;
}

.site-nav a {
    color: var(--text);
    text-decoration: none;
    padding: 8px 10px;
    border-radius: 10px;
    border: 1px solid transparent;
    white-space: nowrap;
}

.site-nav a:hover {
    border-color: var(--border);
    background: var(--surface-2);
}

.nav-spacer {
    flex: 1;
}

.nav-btn {
    cursor: pointer;
    color: var(--text);
    border: 1px solid var(--border);
    background: var(--surface-2);
    padding: 8px 12px;
    border-radius: 10px;
    white-space: nowrap;
}

.nav-btn:hover {
    background: var(--surface-6);
}

.nav-btn:focus {
    outline: none;
    box-shadow: 0 0 0 4px var(--focus);
}

.site-nav[data-open="true"] .nav-inner {
    display: grid;
}

.site-nav[data-open="true"] .nav-spacer {
    display: none;
}

.site-nav[data-open="true"] .site-nav a,
.site-nav[data-open="true"] .nav-btn {
    width: 100%;
}

.site-main {
    padding: 18px 0 34px;
}

.layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.sidebar {
    display: grid;
    gap: 12px;
}

.content {
    display: grid;
    gap: 14px;
}

.section {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface-1);
    padding: 18px;
}

.section-header h2 {
    margin: 0 0 6px;
}

.section-lead {
    margin: 0;
    color: var(--muted);
}

h3 {
    margin-top: 16px;
    margin-bottom: 6px;
}

.card {
    border: 1px solid var(--border);
    background: var(--surface-2);
    border-radius: var(--radius);
    padding: 14px;
}

.card-title {
    margin: 0 0 10px;
    font-size: 16px;
}

.kv-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 10px;
}

.kv-list li {
    display: flex;
    justify-content: space-between;
    gap: 12px;
}

.k {
    color: var(--muted);
}

.v {
    text-align: right;
}

.checklist {
    margin: 0;
    padding-left: 18px;
}

.bullets {
    margin: 0;
    padding-left: 18px;
}

.callout {
    margin-top: 12px;
    padding: 12px 14px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--surface-4);
}

.callout ul {
    margin: 8px 0 0;
    padding-left: 18px;
}

.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 12px;
}

.placeholder-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    margin-top: 12px;
}

.personal-skills {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    margin-top: 12px;
}

.placeholder {
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    background: var(--surface-3);
    padding: 12px;
    min-height: 160px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.placeholder[data-kind="chart"] {
    min-height: 190px;
}

.placeholder[data-kind="image"] {
    min-height: 200px;
}

.placeholder-title {
    font-weight: 600;
    margin-bottom: 6px;
}

.placeholder-hint {
    color: var(--muted);
    font-size: 13px;
}

.mermaid {
    width: 100%;
    overflow-x: auto;
}

.placeholder .mermaid {
    margin: 10px 0 0;
}

.placeholder svg {
    max-width: 100%;
    height: auto;
}

/* Mermaid charts: allow pan/zoom interactions */
pre.mermaid,
.mermaid svg,
pre.mermaid svg {
    cursor: grab;
    touch-action: none;
    user-select: none;
}

pre.mermaid:active,
.mermaid svg:active,
pre.mermaid svg:active {
    cursor: grabbing;
}

.qr-card {
    border: 1px solid var(--border);
    background: var(--surface-2);
    border-radius: var(--radius);
    padding: 14px;
    margin-top: 12px;
}

.qr-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 12px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
}

.qr-title {
    font-weight: 700;
    font-size: 16px;
}

.qr-sub {
    margin-top: 4px;
    color: var(--muted);
    font-size: 13px;
}

.qr-note {
    text-align: right;
    font-size: 12px;
}

.qr-grid {
    margin-top: 12px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.qr-item {
    border: 1px solid var(--border);
    background: var(--surface-3);
    border-radius: var(--radius);
    padding: 12px;
}

.qr-label {
    font-weight: 600;
    margin-bottom: 10px;
}

.qr-frame {
    display: grid;
    place-items: center;
    padding: 10px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--qr-background);
}

.qrcode canvas,
.qrcode img,
.qrcode svg {
    display: block;
    width: var(--qr-size);
    height: var(--qr-size);
}

.qr-link {
    display: block;
    margin-top: 10px;
    color: var(--muted);
    text-decoration: none;
    word-break: break-all;
    border: 1px solid transparent;
    padding: 8px 10px;
    border-radius: 10px;
    background: var(--surface-5);
}

.qr-link:hover {
    color: var(--text);
    border-color: var(--border);
    background: var(--surface-2);
}

.quote {
    margin-top: 12px;
    border-left: 3px solid rgba(59, 130, 246, .65);
    padding: 10px 12px;
    background: rgba(59, 130, 246, .08);
    border-radius: 10px;
}

.quote-green{
    margin-top: 12px;
    border-left: 3px solid rgba(59, 246, 131, 0.65);
    padding: 10px 12px;
    background: rgba(59, 246, 109, 0.08);
    border-radius: 10px;
}

.site-footer {
    margin-top: 10px;
}

a {
    color: inherit;
}

.copyright {
    margin: 6px 0 0;
    font-size: 12px;
    color: var(--muted);
}

.blog-embed {
    margin-top: 12px;
}

.embed-frame {
    margin-top: 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--surface-3);
}

.blog-iframe {
    width: 100%;
    height: 520px;
    border: 0;
    display: block;
}

@media (max-width: 549px) {
    :root {
        --qr-size: 140px;
    }

    .site-header {
        padding: 20px 0 14px;
    }

    .site-title {
        font-size: 22px;
    }

    .header-meta dl {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .header-meta dl > div {
        display: flex;
        justify-content: space-between;
        gap: 12px;
    }

    .nav-shell {
        padding: 10px 0;
    }

    .site-nav a,
    .nav-btn {
        white-space: normal;
        word-break: break-word;
    }

    .section {
        padding: 14px;
    }

    .card {
        padding: 12px;
    }

    .kv-list li {
        flex-direction: column;
        align-items: flex-start;
    }

    .v {
        text-align: left;
    }

    .qr-grid {
        grid-template-columns: 1fr;
    }

    .blog-iframe {
        height: 420px;
    }
}

@media (min-width: 900px) {
    .nav-shell {
        padding: 0 16px;
    }

    .nav-toggle {
        display: none;
    }

    .nav-inner {
        display: flex;
        gap: 10px;
        align-items: center;
        overflow: auto;
        margin-top: 0;
        padding: 10px 0;
    }

    .site-nav[data-open="true"] .nav-inner {
        display: flex;
    }

    .site-nav[data-open="true"] .nav-spacer {
        display: block;
    }

    .site-nav[data-open="true"] .site-nav a,
    .site-nav[data-open="true"] .nav-btn {
        width: auto;
    }

    .header-grid {
        grid-template-columns: 1fr auto;
        align-items: end;
    }

    .header-meta dl {
        grid-template-columns: repeat(3, auto);
        gap: 16px;
    }

    .layout {
        grid-template-columns:350px 1fr;
        align-items: start;
    }

    .sidebar {
        position: sticky;
        top: 70px;
        max-height: calc(100vh - 70px - 18px);
        overflow-y: auto;
        overscroll-behavior: contain;
        padding-right: 6px;
        scrollbar-gutter: stable;
    }

    .two-col {
        grid-template-columns: 1fr 1fr;
    }

    /* 图表/占位：一行一个 */
    .placeholder-row {
        grid-template-columns: 1fr;
    }

    .qr-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.muted {
    color: var(--muted);
    font-size: 14px;
}

@media print {
    @page {
        size: A4;
        margin: 14mm;
    }

    html {
        color-scheme: light !important;
        background: #fff !important;
    }

    html,
    body {
        height: auto !important;
        overflow: visible !important;
        background: #fff !important;
    }

    * {
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }

    :root {
        --bg: #ffffff;
        --panel: #ffffff;
        --panel2: #ffffff;
        --text: #111827;
        --muted: #374151;
        --border: rgba(17, 24, 39, .18);
        --page-bg: #ffffff;
        --header-bg: #ffffff;
        --nav-bg: #ffffff;
        --surface-1: #ffffff;
        --surface-2: #ffffff;
        --surface-3: #ffffff;
        --surface-4: #ffffff;
        --surface-5: #ffffff;
        --surface-6: #ffffff;

        /* 打印：二维码强制黑白，避免夜间主题下“白码白底” */
        --qr-foreground: #111827;
        --qr-background: #ffffff;
    }

    body {
        background: #fff !important;
    }

    /* 打印时避免网格/弹性布局在不同浏览器里出现重叠 */
    .header-grid,
    .header-meta dl,
    .layout,
    .sidebar {
        display: block !important;
    }

    .card,
    .section,
    .placeholder,
    .qr-item {
        width: 100% !important;
    }

    .site-nav,
    .skip-link,
    #printBtn,
    #themeBtn {
        display: none !important;
    }

    a {
        color: #111827;
        text-decoration: underline;
    }

    .layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
    }

    .section {
        break-inside: auto;
    }

    .section-header,
    h2,
    h3 {
        break-after: avoid;
    }

    .card,
    .placeholder,
    .qr-item,
    .quote {
        break-inside: avoid;
    }

    .card,
    .section,
    .placeholder,
    .qr-card,
    .qr-item,
    .embed-frame {
        background: transparent !important;
        box-shadow: none !important;
    }

    .placeholder {
        border-color: rgba(17, 24, 39, .25) !important;
    }

    .placeholder {
        border-style: solid;
    }

    .placeholder,
    .placeholder[data-kind="chart"],
    .placeholder[data-kind="image"] {
        min-height: 0 !important;
        display: block !important;
    }

    .mermaid {
        overflow: visible !important;
    }

    pre.mermaid,
    pre.mermaid svg,
    .qrcode,
    .qrcode canvas,
    .qrcode svg {
        display: block !important;
        visibility: visible !important;
    }

    /* 兼容：夜间主题下的 Mermaid（白字）在打印白底会“看不见” */
    .mermaid svg {
        background: transparent !important;
    }

    .mermaid svg path,
    .mermaid svg line,
    .mermaid svg polyline,
    .mermaid svg polygon,
    .mermaid svg rect,
    .mermaid svg circle {
        stroke: #111827 !important;
    }

    .placeholder svg {
        max-width: 100% !important;
        height: auto !important;
    }

    .embed-frame {
        display: none;
    }

    .blog-embed {
        display: none;
    }

    .personal-skills {
        grid-template-columns: repeat(3, auto);
    }

    .header-meta dl {
        display: grid !important;
        grid-template-columns: repeat(3, auto);
        gap: 16px;
    }


    .sidebar .card {
        margin-bottom: 12px;
    }

    .card.resources {
        display: none;
    }

    .muted.webhint {
        display: none;
    }
}