@charset "utf-8";

:root {
    /* ── 色彩 Token「霁蓝」(After-rain Blue) ──
         以下为 fallback 默认值，实际运行时由 _config.yml → color.ejs 覆盖。
         修改颜色请编辑 themes/A4/_config.yml 的 color 区块。 */
    --accent: #5B8BA4;
    --font-color-0: #5B8BA4;
    --font-color-1: #2D2D32;
    --font-color-2: #697880;
    --font-color-3: #6E7F8A;          /* WCAG AA ≥4.5:1 on white */
    --bg-outer: #F5F7F9;
    --bg-paper: #FCFCFD;
    --bg-zebra: #F1F4F7;
    --surface: #EDF0F4;
    --border-warm: #DCE1E7;
    --line-1: #CCD3D9;
    --line-2: var(--border-warm);
    --bg-color-1: var(--surface);
    --series-accent: #6B9E5F;

    /* ── 间距 Token ── */
    --sp-1: 4px;
    --sp-2: 8px;
    --sp-3: 12px;
    --sp-4: 16px;
    --sp-5: 20px;
    --sp-6: 24px;
    --sp-8: 32px;

    /* ── 代码块色彩 Token ── */
    --code-header-bg: #21252b;
    --code-lang-color: #636d83;
    --code-copy-hover: #abb2bf;
    --code-copy-success: #98c379;

    /* ── GFM Alert 色彩 Token ── */
    --alert-note: #0969da;
    --alert-tip: #1a7f37;
    --alert-important: #8250df;
    --alert-warning: #9a6700;
    --alert-caution: #cf222e;

    /* ── 圆角 Token ── */
    --radius-xs: 4px;
    --radius-s: 8px;
    --radius-m: 12px;
    --radius-l: 16px;

    /* ── 阴影 Token ── */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.05);
    --shadow-lg: 0 10px 28px rgba(0,0,0,0.06);
    --shadow-hover: 0 10px 24px rgba(0,0,0,0.08);

    /* ── 缓动 Token ── */
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --ease-soft: cubic-bezier(0.25, 0.8, 0.25, 1);
}

p {
    word-wrap: break-word;
    white-space: pre-wrap;
}

body {
    font-family: "MiSans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        "Helvetica Neue", Arial, "notoserifsc-medium", "Microsoft YaHei", sans-serif;
    font-size: 16.8px;
    line-height: 1.75;
    color: var(--font-color-1);
    background: var(--bg-outer);
    height: 100%;
}

a {
    text-decoration: none;
    color: var(--accent);
}


/* ═══ 页面容器 ═══ */

.paper {
    padding: 2.5vw;
    background: var(--bg-outer);
    min-height: 100vh;
}

.paper-main {
    width: 100%;
    max-width: 880px;
    margin: 0 auto;
    padding: 32px 4vw 0;
    background: var(--bg-paper);
    border-radius: var(--radius-l);
    box-shadow:
        0 1px 4px rgba(0,0,0,0.04),
        0 6px 20px rgba(0,0,0,0.04);
}

.index-main {
    width: 100%;
    max-width: 580px;
    margin: 0 auto;
    padding: 16px 4vw 0;
    background: var(--bg-paper);
    border-radius: var(--radius-l);
}

/* 首页内容区——覆盖文章级标题样式，用轻量版 */
/* 首页：图片禁止点击下载（gallery-item 的 <a> 链接）*/
.index-main .gallery-item { pointer-events: none; }

.index-main .post-md > :first-child { margin-top: 0; }
.index-main .post-md h4 { margin: 14px 0 8px; padding-left: 0; }
.index-main .post-md h4::before { display: none; }
.index-main .post-md h2 {
    margin: 18px 0 12px;
    font-size: 1.25rem;
    letter-spacing: 0.08em;
    background: none;
    color: var(--font-color-1);
    padding: 0;
    box-shadow: none;
    border-radius: 0;
    width: auto;
    border-left: 3px solid var(--accent);
    padding-left: 12px;
}
.index-main .post-md h2:hover {
    background-position: unset;
    box-shadow: none;
}
.index-main .post-main { margin-bottom: 12px; }


/* ═══ 首页 Header ═══ */

.index-header-line {
    margin-top: 0;
    margin-bottom: 10px;
    font-size: 0.8rem;
    color: var(--font-color-3);
    text-align: center;
    letter-spacing: 0.02em;
    line-height: 1.3;
}

.index-header {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: flex-start;
    align-content: center;
}

.index-logo {
    display: block;
    font-size: 3.0rem;
    font-weight: 400;
    margin-bottom: 2px;
    margin-top: 14px;
    line-height: 1.15;
    letter-spacing: -0.02em;
}


/* ═══ 文章页 Header ═══ */

.header {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 20px;
    padding-bottom: 14px;
    border-bottom: 1px solid rgba(0,0,0,0.04);
}

.header-container {
    display: flex;
    align-items: flex-end;
    gap: 16px;
}

.header-img {
    width: 64px;
    height: 64px;
    object-fit: cover;
    border-radius: 16px;
    flex-shrink: 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    transition: transform 0.2s ease;
}

.header-img:hover {
    transform: scale(1.05);
}

.header-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.logo {
    font-size: 2.0rem;
    font-weight: 500;
    letter-spacing: -0.02em;
    color: var(--accent);
    line-height: 1.3;
}

.description {
    font-size: 0.91rem;
    color: var(--font-color-2);
    letter-spacing: 0.01em;
    line-height: 1.3;
    padding-left: 3px;
}


/* ═══ 导航 ═══ */

.site-nav {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.site-nav-item {
    display: inline-flex;
    align-items: center;
    padding: 4px 13px;
    font-size: 0.88rem;
    color: var(--font-color-2);
    text-decoration: none;
    border-radius: 8px;
    background: rgba(0,0,0,0.025);
    transition: color 0.2s ease, background 0.2s ease;
}

.site-nav-item:hover {
    color: var(--accent);
    background: color-mix(in srgb, var(--accent) 8%, transparent);
}

.site-nav-item.is-active {
    color: var(--accent);
    font-weight: 500;
    background: color-mix(in srgb, var(--accent) 8%, transparent);
}


/* ═══ 文章内容区 ═══ */

.post-main {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: flex-start;
    align-items: flex-start;
    margin-bottom: 24px;
}

.post-main-title {
    flex: 0 0 100%;
    margin: 20px 0 2px;
    font-size: 1.85rem;
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.02em;
    color: var(--font-color-1);
}

.post-head-meta-center,
.post-head-meta-left {
    font-size: 0.8rem;
    color: var(--font-color-3);
    flex: 0 0 100%;
    margin-top: 10px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(0,0,0,0.05);
    margin-bottom: 8px;
    letter-spacing: 0.03em;
}

.post-head-meta-center { text-align: center; }
.post-head-meta-left   { text-align: left; }

.post-meta {
    font-size: 0.85rem;
    color: var(--font-color-3);
    flex: 0 0 100%;
    margin: 20px 0 0;
    padding-top: 16px;
    border-top: 1px solid rgba(0,0,0,0.06);
}

.post-meta-author {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--font-color-1);
    font-weight: 500;
    font-size: 0.88rem;
    margin-bottom: 8px;
}

.post-meta-author svg { color: var(--font-color-3); }

.post-meta-row {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 0.8rem;
    color: var(--font-color-3);
}

.post-meta-date {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.post-meta-tags,
.post-meta-cats {
    display: inline-flex;
    gap: 4px;
    flex-wrap: wrap;
}

.post-meta-chip {
    display: inline-block;
    padding: 2px 8px;
    font-size: 0.75rem;
    border-radius: 6px;
    background: color-mix(in srgb, var(--accent) 8%, transparent);
    color: var(--accent);
    text-decoration: none;
    transition: background 0.2s ease;
}

.post-meta-chip:hover {
    background: color-mix(in srgb, var(--accent) 16%, transparent);
}

.post-meta-chip--cat {
    background: color-mix(in srgb, var(--series-accent) 8%, transparent);
    color: var(--series-accent);
}

.post-meta-chip--cat:hover {
    background: color-mix(in srgb, var(--series-accent) 16%, transparent);
}


/* ═══ Footer ═══ */

.site-footer {
    text-align: center;
    padding: 20px 0 16px;
    margin-top: 20px;
    border-top: 1px solid rgba(0,0,0,0.06);
}

.sf-motto {
    font-size: 0.82rem;
    color: var(--font-color-2);
    letter-spacing: 0.04em;
    margin-bottom: 4px;
}

.sf-legal {
    font-size: 0.65rem;
    color: var(--font-color-3);
    line-height: 1.8;
}

.sf-legal a {
    color: var(--font-color-3);
    transition: color 0.2s ease;
}

.sf-legal a:hover {
    color: var(--accent);
}

.sf-stats {
    font-size: 0.65rem;
    color: var(--font-color-3);
    margin-top: 2px;
}

/* ── 上/下篇导航 ── */
.post-nav-links {
    display: flex;
    gap: 12px;
    margin-top: 20px;
    width: 100%;
}

.post-nav-link {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 14px 16px;
    border-radius: var(--radius-m, 12px);
    background: var(--bg-paper);
    border: 1px solid rgba(0,0,0,0.06);
    text-decoration: none;
    transition: transform 0.2s var(--ease-soft), box-shadow 0.2s var(--ease-soft);
}

.post-nav-link:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.post-nav-label {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.72rem;
    color: var(--font-color-3);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.post-nav-title {
    font-size: 0.88rem;
    color: var(--font-color-1);
    font-weight: 500;
    line-height: 1.35;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.post-nav-next {
    text-align: right;
}

.post-nav-next .post-nav-label {
    justify-content: flex-end;
}

.post-nav-next:first-child {
    margin-left: auto;
}

@media only screen and (max-width: 600px) {
    .post-nav-links { flex-direction: column; }
}


/* ═══ 瀑布流列表 ═══ */

.waterfall {
    column-count: 2;
    column-gap: 14px;
    margin-top: 8px;
}

.wf-section {
    column-span: all;
    padding: 24px 0 10px;
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--font-color-1);
    letter-spacing: 0.02em;
    border-top: 1px solid rgba(0,0,0,0.05);
}

.wf-section:first-child {
    padding-top: 10px;
    border-top: none;
}

.wf-count {
    font-weight: 400;
    color: var(--font-color-3);
    font-size: 0.78rem;
}

.wf-card {
    break-inside: avoid;
    margin-bottom: 12px;
    padding: 14px 16px;
    background: var(--bg-paper);
    border: 1px solid var(--border-warm);
    border-radius: var(--radius-m);
    transition: transform 0.35s var(--ease-spring), box-shadow 0.4s var(--ease-soft);
    animation: fadeUp 0.5s var(--ease-soft);
    position: relative;
    cursor: pointer;
}

.wf-card:hover {
    transform: translateY(-2px) scale(1.005);
    box-shadow: var(--shadow-hover);
}

.wf-card--pin {
    border-left: 3px solid var(--accent);
    background: color-mix(in srgb, var(--accent) 4%, var(--bg-paper));
}

.wf-card--pin .wf-title {
    font-size: 0.96rem;
    font-weight: 500;
}

.wf-head {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
}

.wf-cat {
    font-size: 0.7rem;
    padding: 2px 8px;
    border-radius: 6px;
    background: color-mix(in srgb, var(--accent) 8%, transparent);
    color: var(--accent);
    text-decoration: none;
    transition: background 0.2s ease;
    position: relative;
    z-index: 1;
}

.wf-cat:hover {
    background: color-mix(in srgb, var(--accent) 14%, transparent);
}

.wf-cat--series {
    background: color-mix(in srgb, var(--series-accent) 10%, transparent);
    color: var(--series-accent);
}

.wf-cat--series:hover {
    background: color-mix(in srgb, var(--series-accent) 18%, transparent);
}

.wf-badge {
    font-size: 0.72rem;
    color: var(--accent);
    font-weight: 500;
}

.wf-date {
    font-size: 0.72rem;
    color: var(--font-color-3);
    margin-left: auto;
}

.wf-title {
    display: block;
    font-size: 0.92rem;
    font-weight: 400;
    color: var(--font-color-1);
    line-height: 1.5;
    text-decoration: none;
    transition: color 0.2s ease;
}

.wf-title:hover {
    color: var(--accent);
}

.wf-title::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: var(--radius-m);
}

.wf-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-top: 8px;
}

.wf-tag {
    font-size: 0.65rem;
    color: var(--font-color-3);
    background: rgba(0,0,0,0.03);
    padding: 1px 6px;
    border-radius: 4px;
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

@media (max-width: 600px) {
    .waterfall { column-count: 1; }
}


/* ═══ 特殊容器 ═══ */

.circle-green, .circle-red, .circle-orange, .circle-blue, .circle-black {
    padding: 40px 25px 50px;
    margin-bottom: 15px;
    display: flex;
    flex-direction: column;
    white-space: pre-line;
}

/* 特殊容器 Token 化颜色 */
.circle-green  { --_circle: #1a7f37; }
.circle-red    { --_circle: rgb(156,0,0); }
.circle-orange { --_circle: rgb(244,135,26); }
.circle-blue   { --_circle: rgb(81,114,221); }
.circle-black  { --_circle: rgb(0,0,0); }
.circle-green,
.circle-red,
.circle-orange,
.circle-blue,
.circle-black { border: solid 1px var(--_circle); }


/* ═══ LightGallery 主题适配 ═══ */

.lg-backdrop {
    background-color: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(28px) saturate(1.6);
    -webkit-backdrop-filter: blur(28px) saturate(1.6);
}

.lg-next, .lg-prev {
    background-color: rgba(255,255,255,0.08);
    border-radius: 12px;
    color: rgba(255,255,255,0.65);
}

.lg-next:hover:not(.disabled),
.lg-prev:hover:not(.disabled) {
    color: #fff;
    background-color: rgba(255,255,255,0.14);
}

.lg-toolbar .lg-icon {
    color: rgba(255,255,255,0.55);
}

.lg-toolbar .lg-icon:hover {
    color: #fff;
}

.lg-counter {
    color: rgba(255,255,255,0.45);
    font-size: 13px;
}

.lg-sub-html {
    color: rgba(255,255,255,0.8);
    font-size: 13px;
}

.lg-outer .lg-thumb-outer {
    background-color: rgba(0, 0, 0, 0.5);
}


/* ═══ 评论区 ═══ */

.paper-comment { padding: 4vw; }

.paper-comment-main {
    width: 100%;
    max-width: 880px;
    margin: 0 auto;
    padding: 72px 8vw 24px;
    background: var(--bg-paper);
    border-radius: var(--radius-l);
    box-shadow:
        0 1px 4px rgba(0,0,0,0.04),
        0 6px 20px rgba(0,0,0,0.04);
    transition: box-shadow 0.3s ease;
}

.comments-container {
    display: block;
    margin-top: 10px;
    width: 100%;
}

.comment-area-title {
    width: 100%;
    margin: 10px 0;
    font-size: 1.38rem;
}


/* ═══ 链接状态 ═══ */

.wf-title:link    { color: var(--font-color-1); text-decoration: none; }
.wf-title:visited { color: var(--font-color-2); text-decoration: none; }
.wf-title:hover   { color: var(--accent); text-decoration: none; }

.index-header a:link    { color: var(--font-color-1); text-decoration: none; }
.index-header a:visited { color: var(--font-color-3); text-decoration: none; }
.index-header a:hover   { color: var(--font-color-1); text-decoration: none; }

/* .header 链接色由各组件自行控制：.logo → accent，.site-nav-item → --font-color-2 / hover accent */
.header a.logo      { color: var(--accent); }
.header a.logo:hover { color: var(--accent); }


/* ── 标签 / 分类索引页 — 卡片网格 ── */
.inline-ul {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 12px;
}
.inline-li {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: 0;
    padding: 16px 10px;
    border-radius: var(--radius-m, 12px);
    background: var(--bg-paper);
    border: 1px solid rgba(0,0,0,0.05);
    transition: transform 0.2s var(--ease-soft), box-shadow 0.2s var(--ease-soft);
}
.inline-li:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}
.inline-li a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--font-color-1);
    text-decoration: none;
    text-align: center;
    line-height: 1.3;
}
.inline-li a:hover {
    color: var(--accent);
}
.inline-li span {
    margin-top: 4px;
    font-size: 0.72rem;
    color: var(--font-color-3);
}
.inline-li span i {
    font-style: normal;
}
.inline-li span i::after {
    content: ' 篇';
}
.year-font-color { color: var(--font-color-1) !important; }

@media print {
    .paper { margin: 0; padding: 0; }
    .paper-main { margin: 0 !important; max-width: 100%; }
}


/* ═══ 微交互 ═══ */

.paginator a { transition: color 0.25s ease; }


/* ═══ 滚动条 ═══ */

::-webkit-scrollbar       { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.15); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(0,0,0,0.28); }

html {
    scrollbar-width: thin;
    scrollbar-color: rgba(0,0,0,0.15) transparent;
    scroll-behavior: smooth;
}


/* ═══ 平板断点（768–1024px） ═══ */

@media (min-width: 601px) and (max-width: 1024px) {
    .waterfall { column-count: 2; column-gap: 12px; }
    .paper { width: 92vw; max-width: 760px; padding: clamp(18px, 3vw, 32px); }
    .paper-main { margin: 0 auto; }
}


/* ═══ 超宽屏 clamp 约束 ═══ */

@media (min-width: 1600px) {
    .paper { padding: clamp(24px, 2vw, 48px); }
}


/* ═══ 卡片交错入场 ═══ */

.wf-card:nth-child(2) { animation-delay: 0.06s; }
.wf-card:nth-child(3) { animation-delay: 0.12s; }
.wf-card:nth-child(4) { animation-delay: 0.18s; }
.wf-card:nth-child(5) { animation-delay: 0.24s; }
.wf-card:nth-child(n+6) { animation-delay: 0.3s; }


/* ═══ 无障碍 focus-visible ═══ */

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: var(--radius-xs);
}