/* =========================================================
   证毕QED · 2026 视觉改版
   纸质底色、细线、宽正文、克制的朱色点缀。
   本文件只负责外观；导航、目录、标签筛选仍由原脚本驱动。
   ========================================================= */

:root {
    --paper: #f4f1e9;
    --paper-raised: #faf8f2;
    --paper-deep: #ebe6da;
    --ink: #20211d;
    --ink-soft: #4e4b43;
    --muted: #7b7568;
    --line: rgba(32, 33, 29, 0.12);
    --line-strong: rgba(32, 33, 29, 0.22);
    --accent: #9d4a36;
    --accent-soft: rgba(157, 74, 54, 0.08);
    --serif: "Noto Serif SC Variable", "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
    --sans: "Noto Sans SC Variable", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    --shell: 1320px;
    --reading: 1200px;
    --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--sans);
    font-size: 17px;
    font-weight: 380;
    line-height: 1.9;
    letter-spacing: 0.012em;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

::selection {
    background: var(--accent);
    color: #fffaf2;
    text-shadow: none;
}

a {
    color: inherit;
    transition: color 0.35s var(--ease), border-color 0.35s var(--ease), opacity 0.35s var(--ease), background-color 0.35s var(--ease);
}

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

:focus-visible {
    outline: 1px solid var(--accent);
    outline-offset: 4px;
}

img {
    max-width: 100%;
    height: auto;
}

strong,
b {
    font-weight: 600;
    color: var(--ink);
}

hr {
    border: 0;
    border-top: 1px solid var(--line);
    margin: 2.5em 0;
}

/* ---------------------------------------------------------
   通用壳层
   --------------------------------------------------------- */

.qed-shell {
    width: 100%;
    max-width: var(--shell);
    margin: 0 auto;
    padding-left: clamp(24px, 4vw, 48px);
    padding-right: clamp(24px, 4vw, 48px);
}

.qed-shell--reading {
    max-width: var(--reading);
}

.qed-label {
    font-family: var(--sans);
    font-size: 10px;
    font-weight: 500;
    line-height: 1;
    letter-spacing: 0.26em;
    text-transform: uppercase;
    color: var(--muted);
}

/* ---------------------------------------------------------
   导航
   --------------------------------------------------------- */

.navbar-custom {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    min-height: 0;
    margin: 0;
    padding: 0;
    z-index: 30;
    border: 0;
    border-radius: 0;
    background: linear-gradient(to bottom, rgba(22, 21, 18, 0.64), rgba(22, 21, 18, 0));
    font-family: var(--sans);
    line-height: 1.7;
    transition: background-color 0.4s var(--ease), border-color 0.4s var(--ease), backdrop-filter 0.4s var(--ease);
}

.qed-nav-inner {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: var(--shell);
    height: 88px;
    margin: 0 auto;
    padding: 0 clamp(24px, 4vw, 48px);
}

.navbar-header {
    float: none;
    display: flex;
    align-items: center;
    height: 100%;
}

.navbar-custom .navbar-brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    height: auto;
    padding: 0;
    color: #fffdf7;
    font-family: var(--serif);
    font-size: 17px;
    font-weight: 500;
    line-height: 1;
    letter-spacing: 0.14em;
    text-decoration: none;
    text-shadow: 0 1px 16px rgba(0, 0, 0, 0.28);
}

.navbar-custom .navbar-brand::before {
    content: "";
    display: block;
    width: 8px;
    height: 8px;
    border: 1px solid rgba(255, 253, 247, 0.85);
    transition: background-color 0.35s var(--ease), border-color 0.35s var(--ease), transform 0.35s var(--ease);
}

.navbar-custom .navbar-brand:hover,
.navbar-custom .navbar-brand:focus {
    color: #fffdf7;
}

.navbar-custom .navbar-brand:hover::before,
.navbar-custom .navbar-brand:focus::before {
    background: var(--accent);
    border-color: var(--accent);
    transform: rotate(45deg);
}

.navbar-custom .navbar-toggle {
    float: none;
    margin: 0;
    padding: 10px 0 10px 18px;
    border: 0;
    border-radius: 0;
    background: transparent;
}

.navbar-custom .navbar-toggle .icon-bar {
    width: 20px;
    height: 1px;
    border-radius: 0;
    background: #fffdf7;
}

.navbar-custom .navbar-toggle .icon-bar + .icon-bar {
    margin-top: 5px;
}

.navbar-custom .navbar-toggle:hover,
.navbar-custom .navbar-toggle:focus,
.navbar-custom .navbar-toggle:active {
    background: transparent;
}

#huxblog_navbar {
    margin-left: auto;
}

.navbar-custom .navbar-collapse {
    padding: 0;
    border: 0;
    box-shadow: none;
}

.navbar-custom .nav {
    display: flex;
    align-items: center;
    gap: clamp(22px, 3vw, 46px);
    float: none !important;
    margin: 0;
}

.navbar-custom .nav li {
    float: none;
}

.navbar-custom .nav li a {
    position: relative;
    display: inline-block;
    padding: 8px 0;
    color: rgba(255, 253, 247, 0.78);
    font-size: 12.5px;
    font-weight: 400;
    line-height: 1;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    text-shadow: 0 1px 14px rgba(0, 0, 0, 0.26);
}

.navbar-custom .nav li a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 1px;
    background: currentColor;
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 0.4s var(--ease);
}

.navbar-custom .nav li a:hover,
.navbar-custom .nav li a:focus {
    color: #fffdf7;
}

.navbar-custom .nav li a:hover::after,
.navbar-custom .nav li a:focus::after,
.navbar-custom .nav li a.is-active::after {
    transform: scaleX(1);
}

/* 滚动后固定导航：纸色底、细线、轻微毛玻璃 */
.navbar-custom.is-fixed {
    position: fixed;
    top: -88px;
    background: rgba(244, 241, 233, 0.92);
    border-bottom: 1px solid var(--line);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
}

.navbar-custom.is-fixed .navbar-brand,
.navbar-custom.is-fixed .nav li a {
    color: var(--ink);
    text-shadow: none;
}

.navbar-custom.is-fixed .navbar-brand::before {
    border-color: var(--ink);
}

.navbar-custom.is-fixed .navbar-brand:hover::before {
    border-color: var(--accent);
}

.navbar-custom.is-fixed .nav li a:hover,
.navbar-custom.is-fixed .nav li a:focus {
    color: var(--accent);
}

.navbar-custom.is-fixed .navbar-toggle .icon-bar {
    background: var(--ink);
}

.navbar-custom.is-visible {
    transform: translate3d(0, 100%, 0);
}

/* ---------------------------------------------------------
   章节头图
   --------------------------------------------------------- */

.intro-header {
    position: relative;
    display: flex;
    align-items: flex-end;
    width: 100%;
    min-height: clamp(380px, 48vh, 540px);
    margin: 0 0 clamp(64px, 9vw, 116px);
    overflow: hidden;
    background-color: #2d2b26;
    color: #fffdf7;
    isolation: isolate;
}

.intro-header--home {
    min-height: clamp(540px, 68vh, 760px);
}

.intro-header--post {
    min-height: clamp(400px, 50vh, 560px);
    margin-bottom: clamp(48px, 6vw, 76px);
}

.intro-header--page {
    min-height: clamp(420px, 46vh, 560px);
}

.qed-home-page .intro-header {
    min-height: clamp(500px, 62vh, 700px);
}

.intro-header::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -2;
    background-image: var(--cover-image, none);
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    filter: saturate(0.9) contrast(1.02) brightness(0.98);
}

.intro-header::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background:
        linear-gradient(to bottom, rgba(20, 19, 16, 0.5) 0%, rgba(20, 19, 16, 0.06) 32%, rgba(20, 19, 16, 0.12) 58%, rgba(20, 19, 16, 0.72) 100%),
        linear-gradient(to right, rgba(20, 19, 16, 0.34), rgba(20, 19, 16, 0) 62%);
}

.intro-header .header-mask {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    background: transparent;
}

.intro-header .qed-shell {
    position: relative;
    z-index: 2;
    padding-bottom: clamp(48px, 6vw, 86px);
}

.intro-copy {
    max-width: 900px;
    animation: qed-rise 0.9s 0.08s var(--ease) both;
}

.intro-kicker {
    display: flex;
    align-items: center;
    gap: 14px;
    margin: 0 0 24px;
    color: rgba(255, 253, 247, 0.72);
    font-size: 10px;
    font-weight: 400;
    line-height: 1;
    letter-spacing: 0.28em;
    text-transform: uppercase;
}

.intro-kicker::before {
    content: "";
    width: 34px;
    height: 1px;
    background: rgba(255, 253, 247, 0.58);
}

.intro-header h1 {
    margin: 0;
    color: #fffdf7;
    font-family: var(--serif);
    font-size: clamp(42px, 5.4vw, 64px);
    font-weight: 500;
    line-height: 1.24;
    letter-spacing: 0.03em;
    text-wrap: balance;
    text-shadow: 0 2px 30px rgba(0, 0, 0, 0.24);
}

.intro-header--home h1 {
    font-size: clamp(52px, 6.8vw, 92px);
    line-height: 1.12;
    letter-spacing: 0.05em;
}

.intro-header--post h1 {
    max-width: 900px;
    font-size: clamp(34px, 4.4vw, 58px);
    line-height: 1.3;
}

.intro-subtitle {
    max-width: 680px;
    margin: 22px 0 0;
    color: rgba(255, 253, 247, 0.78);
    font-size: 16px;
    font-weight: 320;
    line-height: 1.9;
    letter-spacing: 0.03em;
}

.intro-meta {
    margin: 28px 0 0;
    color: rgba(255, 253, 247, 0.68);
    font-size: 10px;
    line-height: 1;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.intro-meta .dot {
    display: inline-block;
    width: 3px;
    height: 3px;
    margin: 0 9px 3px;
    border-radius: 50%;
    background: currentColor;
    opacity: 0.65;
}

.intro-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 7px 20px;
    max-width: 820px;
    margin: 0 0 26px;
}

.intro-tags a {
    position: relative;
    padding: 0 0 2px;
    border: 0 !important;
    border-bottom: 1px solid transparent !important;
    border-radius: 0 !important;
    background: transparent !important;
    color: rgba(255, 253, 247, 0.82) !important;
    font-size: 10.5px;
    line-height: 1.7;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    transition: color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.intro-tags a:hover,
.intro-tags a:focus {
    color: #fffdf7 !important;
    border-bottom-color: rgba(255, 253, 247, 0.7) !important;
}

.intro-tags a + a::before {
    content: none;
}

.intro-header .header-img-credit {
    position: absolute;
    right: clamp(20px, 4vw, 48px);
    bottom: 16px;
    z-index: 3;
    color: rgba(255, 253, 247, 0.42);
    font-size: 10px;
    letter-spacing: 0.04em;
}

.intro-header .header-img-credit a {
    color: inherit;
    text-decoration: underline;
    text-underline-offset: 3px;
}

/* ---------------------------------------------------------
   首页与内页骨架
   --------------------------------------------------------- */

.qed-page-grid,
.qed-home-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 250px;
    gap: clamp(48px, 6vw, 88px);
    align-items: start;
}

.qed-page-grid--solo {
    grid-template-columns: minmax(0, 1fr);
    max-width: 900px;
    margin: 0 auto;
}

.qed-page-body {
    min-width: 0;
}

.qed-list-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 24px;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--line-strong);
}

.qed-list-title {
    margin: 0;
    font-family: var(--serif);
    font-size: 15px;
    font-weight: 500;
    line-height: 1;
    letter-spacing: 0.16em;
}

.qed-list-count {
    color: var(--muted);
    font-size: 10px;
    line-height: 1;
    letter-spacing: 0.14em;
}

/* ---------------------------------------------------------
   首页文章列表
   --------------------------------------------------------- */

.qed-post-list {
    margin: 0;
}

.qed-post-list .post-preview {
    display: grid;
    grid-template-columns: 104px minmax(0, 1fr);
    gap: 30px;
    margin: 0;
    padding: 34px 0 38px;
    border-bottom: 1px solid var(--line);
    animation: qed-list-in 0.7s var(--ease) both;
    animation-delay: calc(var(--i, 0) * 45ms);
    transition: border-color 0.4s var(--ease);
}

.qed-post-list .post-preview:hover {
    border-color: var(--line-strong);
}

.qed-post-list .post-date {
    padding-top: 8px;
    color: var(--muted);
    font-family: var(--serif);
    font-size: 13px;
    line-height: 1.2;
    letter-spacing: 0.06em;
    transition: color 0.4s var(--ease), transform 0.4s var(--ease);
}

.qed-post-list .post-preview:hover .post-date {
    color: var(--accent);
    transform: translateX(3px);
}

.qed-post-list .post-body {
    min-width: 0;
}

.qed-post-list .post-link {
    display: block;
    color: inherit;
    text-decoration: none;
}

.qed-post-list .post-title {
    margin: 0 0 10px;
    color: var(--ink);
    font-family: var(--serif);
    font-size: clamp(23px, 2.2vw, 30px);
    font-weight: 500;
    line-height: 1.46;
    letter-spacing: 0.012em;
    transition: color 0.35s var(--ease);
}

.qed-post-list .post-preview:hover .post-title {
    color: var(--accent);
}

.qed-post-list .post-subtitle {
    margin: 0 0 14px;
    color: var(--ink-soft);
    font-size: 13.5px;
    font-weight: 400;
    line-height: 1.8;
    letter-spacing: 0.02em;
}

.qed-post-list .post-excerpt {
    display: -webkit-box;
    margin: 0;
    overflow: hidden;
    color: #716c61;
    font-size: 14px;
    font-weight: 360;
    line-height: 2;
    letter-spacing: 0.015em;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
}

.qed-post-list .post-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 7px;
    margin: 16px 0 0;
    color: var(--muted);
    font-size: 10px;
    line-height: 1;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.qed-post-list .post-meta i {
    font-style: normal;
    opacity: 0.55;
}

/* 翻页 */
.qed-pager,
.pager {
    display: flex;
    justify-content: space-between;
    gap: 24px;
    margin: 0 !important;
    padding: 0 !important;
    border-top: 1px solid var(--line-strong);
    list-style: none;
}

.qed-pager li,
.pager li {
    float: none !important;
    width: auto !important;
    margin: 0;
}

.qed-pager li > a,
.pager li > a,
.pager li > span {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 26px 0 !important;
    border: 0 !important;
    border-radius: 0 !important;
    background: transparent !important;
    color: var(--ink) !important;
    font-family: var(--sans) !important;
    font-size: 11px !important;
    font-weight: 400 !important;
    line-height: 1 !important;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    box-shadow: none !important;
}

.qed-pager li > a:hover,
.qed-pager li > a:focus,
.pager li > a:hover,
.pager li > a:focus {
    color: var(--accent) !important;
    background: transparent !important;
}

.pager li.next > a {
    margin-left: auto;
}

.pager .pager-arrow {
    font-family: var(--sans);
    font-size: 14px;
    transition: transform 0.35s var(--ease);
}

.pager li > a:hover .pager-arrow {
    transform: translateX(4px);
}

.pager li.previous > a:hover .pager-arrow {
    transform: translateX(-4px);
}

/* ---------------------------------------------------------
   侧栏
   --------------------------------------------------------- */

.qed-sidebar {
    position: sticky;
    top: 112px;
    align-self: start;
    color: var(--muted);
    font-size: 13.5px;
    line-height: 1.8;
}

.qed-side-block {
    margin: 0 0 34px;
    padding: 0 0 32px;
    border-bottom: 1px solid var(--line);
}

.qed-side-block:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: 0;
}

.qed-side-block h5 {
    margin: 0 0 18px;
    color: var(--ink);
    font-family: var(--serif);
    font-size: 13px;
    font-weight: 500;
    line-height: 1;
    letter-spacing: 0.14em;
}

.qed-side-block h5 a {
    color: var(--ink) !important;
    text-decoration: none;
}

.qed-side-block h5 a:hover,
.qed-side-block h5 a:focus {
    color: var(--accent) !important;
}

.qed-side-block hr {
    display: none;
}

/* 侧栏作者卡 */
.qed-about-head {
    display: grid;
    grid-template-columns: 68px minmax(0, 1fr);
    gap: 18px;
    align-items: center;
}

.qed-about-head img {
    display: block;
    width: 68px;
    height: 68px;
    object-fit: cover;
    border: 1px solid var(--line);
    border-radius: 2px;
    background: var(--paper-raised);
    filter: grayscale(0.15);
}

.qed-about-head h5 {
    margin: 0 0 8px;
}

.qed-about-head p {
    margin: 0;
    color: var(--muted);
    font-size: 12.5px;
    line-height: 1.85;
    letter-spacing: 0.02em;
}

.qed-about .qed-sns-list {
    display: flex;
    flex-wrap: wrap;
    gap: 9px;
    margin: 20px 0 0;
    padding: 0;
    list-style: none;
}

.qed-about .qed-sns-list > li {
    padding: 0;
}

.qed-about .fa-stack {
    width: 34px;
    height: 34px;
    line-height: 32px;
    font-size: 13px;
    transition: border-color 0.35s var(--ease), color 0.35s var(--ease), transform 0.35s var(--ease);
}

.qed-about .fa-stack {
    display: inline-block;
    border: 1px solid var(--line);
    border-radius: 50%;
}

.qed-about .fa-stack .fa-circle {
    display: none;
}

.qed-about .fa-stack .fa-inverse {
    color: var(--ink-soft) !important;
}

.qed-about .fa-stack:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.qed-about .fa-stack:hover .fa-inverse {
    color: var(--accent) !important;
}

/* 侧栏标签 */
.qed-side-block .tags {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    margin: 0;
}

.qed-side-block .tags a,
.qed-side-block .tags .tag {
    display: inline-block;
    margin: 0 !important;
    padding: 4px 9px 5px;
    border: 1px solid var(--line);
    border-radius: 2px;
    background: transparent;
    color: var(--muted) !important;
    font-size: 11.5px;
    font-weight: 400;
    line-height: 1.4;
    letter-spacing: 0.04em;
    text-decoration: none;
    transition: color 0.35s var(--ease), border-color 0.35s var(--ease), background-color 0.35s var(--ease);
}

.qed-side-block .tags a:hover,
.qed-side-block .tags a:focus,
.qed-side-block .tags a:active {
    border-color: var(--accent);
    background: var(--accent-soft);
    color: var(--accent) !important;
}

.qed-side-block .tags a sup,
.qed-side-block .tags .tag sup {
    margin-left: 3px;
    font-size: 8px;
    opacity: 0.55;
}

/* 侧栏友链 */
.qed-side-block .list-inline:not(.text-center):not(.qed-sns-list) {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 16px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.qed-side-block .list-inline > li {
    padding: 0;
    font-size: 12px;
}

.qed-side-block .list-inline a {
    color: var(--muted) !important;
    text-decoration: none;
}

.qed-side-block .list-inline a:hover,
.qed-side-block .list-inline a:focus {
    color: var(--accent) !important;
    text-decoration: underline;
    text-underline-offset: 3px;
}

/* ---------------------------------------------------------
   内页正文
   --------------------------------------------------------- */

.qed-page-body.post-container {
    padding: 0 !important;
    margin: 0 !important;
}

.qed-page-body.post-container > h2:first-child,
.qed-page-body.post-container > h1:first-child {
    margin-top: 0;
}

.post-container {
    color: var(--ink-soft);
    font-size: 17px;
    line-height: 2;
    letter-spacing: 0.014em;
}

.post-container p {
    margin: 1.6em 0;
}

.post-container a {
    color: #8e4332;
    text-decoration: underline;
    text-decoration-color: rgba(157, 74, 54, 0.3);
    text-decoration-thickness: 1px;
    text-underline-offset: 0.22em;
    transition: color 0.3s var(--ease), text-decoration-color 0.3s var(--ease);
}

.post-container a:hover,
.post-container a:focus {
    color: var(--accent);
    text-decoration-color: var(--accent);
}

.post-container h1,
.post-container h2,
.post-container h3,
.post-container h4,
.post-container h5,
.post-container h6 {
    margin: 2.8em 0 1.1em;
    color: var(--ink);
    font-family: var(--serif);
    font-weight: 500;
    line-height: 1.48;
    letter-spacing: 0.018em;
    text-wrap: balance;
}

.post-container h1 {
    font-size: clamp(28px, 3.1vw, 38px);
    letter-spacing: 0.03em;
}

.post-container h2 {
    position: relative;
    font-size: clamp(23px, 2.5vw, 29px);
}

.post-container h2::before {
    content: "";
    display: block;
    width: 34px;
    height: 1px;
    margin: 0 0 20px;
    border: 0;
    background: var(--accent);
    opacity: 0.62;
}

.post-container h3 {
    font-size: 22px;
}

.post-container h4 {
    font-size: 19px;
    color: var(--ink);
}

.post-container h5,
.post-container h6 {
    color: var(--ink-soft);
    font-size: 17px;
    font-weight: 600;
}

.post-container h1 + p,
.post-container h2 + p,
.post-container h3 + p,
.post-container h4 + p,
.post-container h5 + p,
.post-container h6 + p {
    margin-top: 1em;
}

.post-container ul,
.post-container ol {
    margin: 1.6em 0;
    padding-left: 1.4em;
}

.post-container li {
    margin: 0.4em 0;
}

.post-container li::marker {
    color: var(--accent);
}

.post-container li p {
    margin: 0.4em 0;
}

.post-container blockquote {
    margin: 2.4em 0;
    padding: 0.2em 0 0.2em 28px;
    border-left: 1px solid var(--accent);
    color: var(--ink-soft);
    font-size: 16px;
    font-style: normal;
    line-height: 1.95;
}

.post-container blockquote p {
    margin: 0.5em 0;
}

.post-container code,
.post-container kbd,
.post-container samp {
    padding: 0.12em 0.38em;
    border: 1px solid #e1dbce;
    border-radius: 2px;
    background: #eee9de;
    color: #423f37;
    font-family: var(--mono);
    font-size: 0.86em;
}

.post-container pre {
    margin: 2em 0;
    padding: 24px 26px;
    overflow: auto;
    border: 1px solid #e1dbce;
    border-radius: 2px;
    background: #f0ece2;
    color: #35332d;
    font-size: 13.5px;
    line-height: 1.8;
    -webkit-overflow-scrolling: touch;
}

.post-container pre code {
    padding: 0;
    border: 0;
    background: transparent;
    font-size: inherit;
}

.post-container table {
    width: 100%;
    margin: 2em 0;
    border-collapse: collapse;
    font-size: 14px;
}

.post-container table.table > tbody th,
.post-container table.table > thead th,
.post-container table.table > tbody td,
.post-container table.table > thead td {
    padding: 12px 14px;
    border: 0 !important;
    border-bottom: 1px solid var(--line) !important;
    background: transparent;
    font-weight: 400;
}

.post-container table.table > thead th {
    color: var(--ink);
    font-weight: 600;
}

.post-container img {
    display: block;
    max-width: 100%;
    height: auto;
    margin: 2.4em auto;
    border-radius: 2px;
}

.post-container figure {
    margin: 2.4em 0;
}

.post-container figcaption {
    margin-top: 10px;
    color: var(--muted);
    font-size: 12px;
    text-align: center;
}

/* 作者用内联黑框包起来的定义/定理：保留语义，改成纸色细框 */
.post-container div[style*="border"] {
    margin: 1em 0 !important;
    padding: 22px 26px !important;
    border: 1px solid #ddd5c4 !important;
    border-radius: 2px;
    background: var(--paper-raised);
    color: var(--ink-soft);
    line-height: 1.95;
    box-shadow: none;
}

.post-container div[style*="border"] > b:first-child,
.post-container div[style*="border"] > strong:first-child {
    display: block;
    margin-bottom: 0.5em;
    color: var(--ink);
    font-family: var(--serif);
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0.04em;
}

.post-container div[style*="border"] p {
    margin: 0.55em 0;
}

.post-container div[style*="border"] mjx-container[display="true"] {
    margin: 1.05em 0 !important;
}

/* 作者在两个框之间随手写的 <br>，会把间距再撑开一行 */
.post-container div[style*="border"] + br {
    display: none;
}

.post-container div[style*="border"] + div[style*="border"]:not(.qed-box--proof),
.post-container div[style*="border"] + br + div[style*="border"]:not(.qed-box--proof) {
    margin-top: 40px !important;
}

/* Markdown 生成的空 <p><br></p> 是空隙的真正来源 */
.post-container p:has(> br:only-child) {
    display: none;
}

/* 定理与紧随其后的证明拼成一整块，中间不留缝 */
.post-container div.qed-box--paired {
    margin-bottom: 0 !important;
    border-bottom-right-radius: 0;
    border-bottom-left-radius: 0;
}

.post-container div.qed-box--proof {
    margin-top: 0 !important;
    border-top: 0 !important;
    border-top-right-radius: 0;
    border-top-left-radius: 0;
}

/* 证明后面如果紧跟另一个方框，底部留 40px */
.post-container div.qed-box--proof:has(+ div[style*="border"]) {
    margin-bottom: 40px !important;
}

/* 公式 */
.post-container .MathJax,
.post-container .MathJax_SVG_Display,
.post-container mjx-container {
    overflow-x: auto;
    overflow-y: hidden;
    max-width: 100%;
}

.post-container mjx-container[display="true"],
.post-container .MathJax_SVG_Display {
    margin: 2.1em 0 !important;
}

/* 文章结束的小方框，呼应证毕符号 */
.qed-end-mark {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    margin: clamp(56px, 7vw, 84px) 0 0;
}

.qed-end-mark::before,
.qed-end-mark::after {
    content: "";
    width: clamp(32px, 5vw, 54px);
    height: 1px;
    background: var(--line-strong);
}

.qed-end-mark span {
    display: block;
    width: 7px;
    height: 7px;
    border: 1px solid var(--line-strong);
}

/* 文章底部标签与友链 */
.post-colophon {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 56px;
    max-width: 860px;
    margin: clamp(32px, 4vw, 48px) 0 0;
    padding-top: 36px;
    border-top: 1px solid var(--line-strong);
}

.post-colophon .sidebar-container {
    color: var(--muted);
    font-size: 12px;
}

.post-colophon h5 {
    margin: 0 0 16px;
    color: var(--ink);
    font-family: var(--serif);
    font-size: 13px;
    font-weight: 500;
    line-height: 1;
    letter-spacing: 0.14em;
}

.post-colophon h5 a {
    color: var(--ink) !important;
}

.post-colophon hr {
    display: none;
}

.post-colophon .tags {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
}

.post-colophon .tags a {
    margin: 0 !important;
    padding: 4px 9px 5px;
    border: 1px solid var(--line);
    border-radius: 2px;
    background: transparent;
    color: var(--muted) !important;
    font-size: 11.5px;
    line-height: 1.4;
    letter-spacing: 0.04em;
}

.post-colophon .tags a:hover {
    border-color: var(--accent);
    background: var(--accent-soft);
    color: var(--accent) !important;
}

.post-colophon .list-inline {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 16px;
    margin: 0;
    padding: 0;
}

.post-colophon .list-inline > li {
    padding: 0;
}

.post-colophon .list-inline a {
    color: var(--muted) !important;
}

.post-colophon .list-inline a:hover {
    color: var(--accent) !important;
}

/* ---------------------------------------------------------
   文章页布局
   --------------------------------------------------------- */

.qed-post-frame {
    width: 100%;
    max-width: 1120px;
    margin: 0 auto;
}

.qed-post-grid {
    display: grid;
    grid-template-columns: minmax(0, 860px) 180px;
    justify-content: center;
    gap: 80px;
    align-items: start;
}

.qed-prose {
    min-width: 0;
    max-width: none !important;
    padding: 0 !important;
    margin: 0 !important;
}

.qed-post-grid--no-catalog {
    grid-template-columns: minmax(0, 860px);
}

.qed-prose > h1:first-child,
.qed-prose > h2:first-child,
.qed-prose > h3:first-child {
    margin-top: 0;
}

/* 关于页：两张签名照片并排，不占满整行 */
.qed-about-page .post-container p > img {
    display: inline-block;
    width: calc(50% - 10px);
    margin: 1.2em 8px 2.4em 0;
    vertical-align: top;
}

.qed-about-page .post-container p > img + img {
    margin-right: 0;
}

/* 右侧目录 */
.catalog-container {
    align-self: stretch;
    min-width: 0;
    padding: 0 !important;
}

.side-catalog {
    position: sticky;
    top: 112px;
    display: block;
    width: 180px;
    max-height: calc(100vh - 150px);
    padding: 0;
    overflow: auto;
    scrollbar-width: thin;
}

.side-catalog.fixed {
    position: sticky;
    top: 112px;
}

.side-catalog h5 {
    margin: 0 0 18px;
    padding: 0;
    color: var(--muted);
    font-family: var(--sans);
    font-size: 10px;
    font-weight: 500;
    line-height: 1;
    letter-spacing: 0.22em;
    text-transform: uppercase;
}

.side-catalog h5 a {
    color: inherit !important;
    text-decoration: none;
}

.side-catalog .catalog-toggle::before {
    content: "—";
    margin-right: 7px;
    color: var(--accent);
}

.side-catalog.fold .catalog-toggle::before {
    content: "+";
}

.side-catalog .catalog-body {
    margin: 0;
    padding: 0;
    list-style: none;
}

.side-catalog .catalog-body li {
    position: relative;
    margin: 0;
    padding: 0;
    list-style: none;
    line-height: 1;
}

.side-catalog .catalog-body li a {
    display: block;
    max-width: 180px;
    padding: 7px 0 7px 12px;
    overflow: hidden;
    border-left: 1px solid transparent;
    color: #928c7f !important;
    font-size: 11.5px;
    font-weight: 400;
    line-height: 1.65;
    text-decoration: none;
    white-space: nowrap;
    text-overflow: ellipsis;
    transition: color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.side-catalog .catalog-body li a:hover,
.side-catalog .catalog-body li a:focus {
    color: var(--ink) !important;
}

.side-catalog .catalog-body li a.active {
    border-left-color: var(--accent);
    color: var(--accent) !important;
}

.side-catalog .catalog-body .h1_nav a,
.side-catalog .catalog-body .h2_nav a {
    color: #6f6a5f !important;
    font-size: 12px;
}

.side-catalog .catalog-body .h3_nav a {
    padding-top: 4px;
    padding-bottom: 4px;
    font-size: 11px;
    opacity: 0.9;
}

.side-catalog .catalog-body .h4_nav a,
.side-catalog .catalog-body .h5_nav a,
.side-catalog .catalog-body .h6_nav a {
    padding-top: 3px;
    padding-bottom: 3px;
    font-size: 10.5px;
    opacity: 0.78;
}

/* ---------------------------------------------------------
   归档页
   --------------------------------------------------------- */

.qed-archive-body {
    max-width: 900px;
    margin: 0 auto;
}

#tag_cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    margin: 0 0 30px;
}

#tag_cloud a,
#tag_cloud .tag {
    margin: 0 !important;
    padding: 4px 10px 5px !important;
    border: 1px solid var(--line) !important;
    border-radius: 2px !important;
    background: transparent !important;
    color: var(--muted) !important;
    font-size: 11.5px !important;
    line-height: 1.5 !important;
    letter-spacing: 0.04em;
    box-shadow: none !important;
    transition: color 0.3s var(--ease), border-color 0.3s var(--ease), background-color 0.3s var(--ease);
}

#tag_cloud a:hover,
#tag_cloud a:active,
#tag_cloud a.focus,
#tag_cloud .tag:hover,
#tag_cloud .tag:active,
#tag_cloud .tag.focus {
    border-color: var(--accent) !important;
    background: var(--accent-soft) !important;
    color: var(--accent) !important;
}

#tag_cloud a.tag-button--all,
#tag_cloud .tag.tag-button--all {
    color: var(--ink) !important;
    border-color: var(--line-strong) !important;
}

#tag_cloud a.tag-button--all:hover,
#tag_cloud a.tag-button--all.focus,
#tag_cloud .tag.tag-button--all:hover,
#tag_cloud .tag.tag-button--all.focus {
    color: var(--accent) !important;
    border-color: var(--accent) !important;
    background: var(--accent-soft) !important;
}

#tag_cloud sup {
    margin-left: 3px;
    font-size: 8px;
    opacity: 0.55;
}

.mini-post-list {
    margin: 0;
}

.mini-post-list section {
    margin: 0;
}

.mini-post-list .listing-seperator {
    display: block;
    margin: 44px 0 0;
    padding: 18px 0 10px;
    border-top: 1px solid var(--line-strong);
    color: var(--ink);
    font-size: 12px !important;
    font-weight: 500;
    line-height: 1;
    letter-spacing: 0.18em;
}

.mini-post-list section:first-child .listing-seperator {
    margin-top: 0;
}

.mini-post-list .listing-seperator::before {
    display: none;
}

.mini-post-list .listing-seperator .tag-text {
    color: var(--ink);
    font-family: var(--serif);
    font-size: 25px;
    font-weight: 400;
    line-height: 1;
    letter-spacing: 0.04em;
}

.mini-post-list .post-preview {
    position: relative;
    margin: 0 !important;
    padding: 20px 0 22px;
    border-bottom: 1px solid var(--line);
}

.mini-post-list .post-preview > a {
    display: block;
    color: inherit;
    text-decoration: none;
}

.mini-post-list .post-preview > a > .post-title {
    margin: 0 !important;
    color: var(--ink);
    font-family: var(--serif);
    font-size: 19px !important;
    font-weight: 500;
    line-height: 1.55 !important;
    letter-spacing: 0.01em;
    transition: color 0.3s var(--ease);
}

.mini-post-list .post-preview:hover > a > .post-title {
    color: var(--accent);
}

.mini-post-list .post-preview > a > .post-subtitle {
    margin: 6px 0 0 !important;
    color: var(--muted);
    font-size: 12px !important;
    line-height: 1.7;
}

.mini-post-list .post-preview hr {
    display: none;
}

/* ---------------------------------------------------------
   页脚
   --------------------------------------------------------- */

footer {
    margin-top: clamp(88px, 12vw, 152px);
    padding: 0;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: 11px;
    line-height: 2;
}

.qed-footer-inner {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 24px;
    max-width: var(--shell);
    margin: 0 auto;
    padding: 34px clamp(24px, 4vw, 48px) 42px;
}

footer .copyright {
    margin: 0;
    color: var(--muted);
    font-size: 11px;
    line-height: 1.8;
    letter-spacing: 0.04em;
    text-align: left;
}

footer .copyright a {
    color: var(--ink-soft);
    text-decoration: none;
}

footer .copyright a:hover,
footer .copyright a:focus {
    color: var(--accent);
}

.qed-footer-mark {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--muted);
    font-family: var(--serif);
    font-size: 10px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    white-space: nowrap;
}

.qed-footer-mark::before {
    content: "";
    display: block;
    width: 7px;
    height: 7px;
    border: 1px solid var(--line-strong);
}

/* ---------------------------------------------------------
   404 / 离线页
   --------------------------------------------------------- */

.page-fullscreen .intro-header {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    min-height: 100%;
    margin: 0;
}

.page-fullscreen #tag-heading {
    padding: 0;
}

.page-fullscreen footer {
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 4;
    margin: 0;
    border-top: 0;
    background: transparent;
}

.page-fullscreen footer .copyright,
.page-fullscreen footer .copyright a,
.page-fullscreen .qed-footer-mark {
    color: rgba(255, 253, 247, 0.55);
}

/* ---------------------------------------------------------
   阅读进度与动效
   --------------------------------------------------------- */

.qed-progress {
    position: fixed;
    top: 0;
    right: 0;
    left: 0;
    z-index: 50;
    height: 1px;
    overflow: hidden;
    pointer-events: none;
}

.qed-progress span {
    display: block;
    width: 100%;
    height: 100%;
    background: var(--accent);
    opacity: 0.78;
    transform: scaleX(0);
    transform-origin: left center;
}

@supports (animation-timeline: scroll()) {
    .qed-progress span {
        animation: qed-progress-grow linear both;
        animation-timeline: scroll(root block);
    }
}

@keyframes qed-progress-grow {
    from {
        transform: scaleX(0);
    }
    to {
        transform: scaleX(1);
    }
}

/* ---------------------------------------------------------
   动画
   --------------------------------------------------------- */

@keyframes qed-rise {
    from {
        opacity: 0;
        transform: translateY(14px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes qed-list-in {
    from {
        opacity: 0;
        transform: translateY(9px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes qed-list-in {
    from {
        opacity: 0;
        transform: translateY(9px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .qed-progress {
        display: none;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }
}

/* ---------------------------------------------------------
   响应式
   --------------------------------------------------------- */

@media (max-width: 1199px) {
    .qed-post-frame {
        max-width: 860px;
    }

    .qed-post-grid {
        grid-template-columns: minmax(0, 1fr);
        max-width: none;
        margin: 0;
        gap: 0;
    }

    .catalog-container {
        display: none;
    }
}

@media (max-width: 1080px) {
    .qed-page-grid,
    .qed-home-grid {
        grid-template-columns: minmax(0, 1fr);
        gap: 0;
    }

    .qed-sidebar {
        position: static;
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 32px;
        margin-top: 64px;
        padding-top: 36px;
        border-top: 1px solid var(--line-strong);
    }

    .qed-side-block {
        margin: 0;
        padding: 0;
        border: 0;
    }

    .qed-side-block h5 {
        margin-bottom: 14px;
    }
}

@media (max-width: 991px) {
    .qed-nav-inner {
        height: 78px;
    }

    .intro-header {
        min-height: 400px;
        margin-bottom: 72px;
    }

    .intro-header--home {
        min-height: 540px;
    }

    .intro-header--page {
        min-height: 360px;
    }
}

@media (max-width: 767px) {
    body {
        font-size: 16px;
    }

    .qed-shell,
    .qed-nav-inner {
        padding-left: 22px;
        padding-right: 22px;
    }

    .qed-nav-inner {
        height: 70px;
    }

    .navbar-custom {
        background: linear-gradient(to bottom, rgba(22, 21, 18, 0.64), rgba(22, 21, 18, 0));
    }

    .navbar-custom .navbar-brand {
        order: 1;
        gap: 9px;
        font-size: 16px;
    }

    .navbar-custom .navbar-brand::before {
        width: 7px;
        height: 7px;
    }

    .navbar-header {
        width: 100%;
        justify-content: space-between;
    }

    .navbar-custom .navbar-toggle {
        order: 2;
        margin-left: auto;
    }

    /* 移动端菜单：整条下拉，不再依赖被 transform 压成 0 宽的父元素 */
    #huxblog_navbar {
        position: absolute;
        top: 70px;
        right: 0;
        left: 0;
        width: 100%;
        height: auto;
        margin: 0;
        opacity: 1 !important;
        transform: none !important;
        -webkit-transform: none !important;
    }

    .navbar-custom .navbar-collapse {
        position: static;
        width: 100%;
        height: 0;
        margin: 0;
        padding: 0;
        overflow: hidden;
        border: 0;
        border-radius: 0;
        background: rgba(250, 248, 242, 0.98);
        box-shadow: none;
        transform: none !important;
        -webkit-transform: none !important;
        -webkit-backdrop-filter: blur(14px);
        backdrop-filter: blur(14px);
    }

    #huxblog_navbar.in li {
        opacity: 1 !important;
    }

    #huxblog_navbar.in .navbar-collapse {
        border-top: 1px solid var(--line);
        border-bottom: 1px solid var(--line);
    }

    .navbar-custom .nav {
        display: block;
        padding: 10px 22px 18px;
    }

    .navbar-custom .nav li {
        display: block;
    }

    .navbar-custom .nav li a,
    .navbar-custom.is-fixed .nav li a {
        display: block;
        padding: 12px 0;
        color: var(--ink);
        font-size: 12.5px;
        letter-spacing: 0.15em;
        text-shadow: none;
    }

    .navbar-custom .nav li a::after {
        display: none;
    }

    #huxblog_navbar a {
        font-size: 12.5px;
        line-height: 1.4;
    }

    .intro-header,
    .intro-header--post,
    .intro-header--page {
        min-height: 360px;
        margin-bottom: 56px;
    }

    .intro-header--home {
        min-height: 480px;
    }

    .qed-home-page .intro-header {
        min-height: 480px;
    }

    .intro-header .qed-shell {
        padding-bottom: 44px;
    }

    .intro-header h1 {
        font-size: clamp(34px, 9vw, 46px);
    }

    .intro-header--home h1 {
        font-size: clamp(44px, 13vw, 62px);
    }

    .intro-header--post h1 {
        font-size: clamp(29px, 7.6vw, 40px);
    }

    .intro-subtitle {
        margin-top: 16px;
        font-size: 14px;
    }

    .intro-kicker {
        margin-bottom: 18px;
    }

    /* 标签多的时候保持一行，横向滑动查看，避免把标题越挤越下 */
    .intro-tags {
        flex-wrap: nowrap;
        gap: 16px;
        margin-bottom: 20px;
        padding-bottom: 3px;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        -ms-overflow-style: none;
        -webkit-mask-image: linear-gradient(to right, #000 92%, transparent 100%);
        mask-image: linear-gradient(to right, #000 92%, transparent 100%);
    }

    .intro-tags::-webkit-scrollbar {
        display: none;
    }

    .intro-tags a {
        flex: 0 0 auto;
        font-size: 10px;
    }

    .qed-post-list .post-preview {
        grid-template-columns: minmax(0, 1fr);
        gap: 10px;
        padding: 26px 0 30px;
    }

    .qed-post-list .post-date {
        padding-top: 0;
        font-family: var(--sans);
        font-size: 10px;
        letter-spacing: 0.14em;
    }

    .qed-post-list .post-title {
        font-size: 23px;
    }

    .qed-post-list .post-excerpt {
        font-size: 13.5px;
        -webkit-line-clamp: 2;
    }

    .qed-list-head {
        padding-bottom: 14px;
    }

    .qed-sidebar {
        grid-template-columns: minmax(0, 1fr);
        gap: 30px;
        margin-top: 48px;
        padding-top: 30px;
    }

    .qed-side-block {
        padding-bottom: 26px;
        border-bottom: 1px solid var(--line);
    }

    .qed-side-block:last-child {
        padding-bottom: 0;
        border-bottom: 0;
    }

    .post-container {
        font-size: 16.5px;
        line-height: 1.95;
    }

    .post-container h1 {
        font-size: 27px;
    }

    .post-container h2 {
        font-size: 23px;
    }

    .post-container h3 {
        font-size: 20px;
    }

    .post-container div[style*="border"] {
        margin: 1.8em 0 !important;
        padding: 18px 18px !important;
    }

    .qed-about-page .post-container p > img {
        display: block;
        width: 100%;
        margin: 1.2em 0 2em;
    }

    .post-colophon {
        grid-template-columns: minmax(0, 1fr);
        gap: 34px;
        margin-top: 56px;
        padding-top: 28px;
    }

    .qed-pager li > a,
    .pager li > a,
    .pager li > span {
        padding: 22px 0 !important;
        font-size: 10px !important;
    }

    footer {
        margin-top: 80px;
    }

    .qed-footer-inner {
        display: block;
        padding-top: 28px;
        padding-bottom: 34px;
    }

    .qed-footer-mark {
        margin-top: 10px;
    }

    .mini-post-list .listing-seperator .tag-text {
        font-size: 22px;
    }

    .mini-post-list .post-preview > a > .post-title {
        font-size: 17px !important;
    }
}

@media (max-width: 420px) {
    .navbar-custom .nav {
        padding-left: 18px;
        padding-right: 18px;
    }

    .qed-shell,
    .qed-nav-inner {
        padding-left: 18px;
        padding-right: 18px;
    }

    .intro-header--home h1 {
        font-size: 42px;
    }
}

@media (max-width: 350px) {
    .navbar-custom .navbar-brand {
        gap: 7px;
        font-size: 14px;
        letter-spacing: 0.1em;
    }

    .navbar-custom .navbar-brand::before {
        width: 6px;
        height: 6px;
    }

    .navbar-custom .navbar-toggle {
        padding-left: 10px;
    }

    .intro-tags {
        gap: 6px 14px;
    }
}