/* ============================================
   QIWI Theme - Design System
   ============================================ */

/* 默认深色模式变量 */
:root {
    /* 纸面 */
    --paper: #18181b;
    --paper-deep: #1f1f22;
    --surface: #27272a;
    --paper-edge: #3f3f46;
    --paper-edge-2: #4a4a52;
    --ink: #e4e4e7;
    --ink-soft: #a1a1aa;
    --ink-faint: #90909a;

    /* 焦糖墨 */
    --caramel: #d4c4b0;
    --caramel-soft: #8b7355;

    /* 批注笔 */
    --hue-red: #e59a9a;
    --hue-orange: #e0ad7d;
    --hue-yellow: #ded07f;
    --hue-green: #a9c997;
    --hue-cyan: #8ed0cc;
    --hue-blue: #9ebce5;
    --hue-purple: #c2a6e4;
    --hue-red-bg: rgba(229, 154, 154, 0.18);
    --hue-orange-bg: rgba(224, 173, 125, 0.18);
    --hue-yellow-bg: rgba(222, 208, 127, 0.2);
    --hue-green-bg: rgba(169, 201, 151, 0.18);
    --hue-cyan-bg: rgba(142, 208, 204, 0.18);
    --hue-blue-bg: rgba(158, 188, 229, 0.18);
    --hue-purple-bg: rgba(194, 166, 228, 0.18);

    /* 旧变量兼容层 */
    --color-bg: var(--paper);
    --color-bg-deep: var(--paper-deep);
    --color-surface: var(--surface);
    --color-text-primary: var(--ink);
    --color-text-secondary: var(--ink-soft);
    --color-text-tertiary: var(--ink-faint);
    --color-border: var(--paper-edge);
    --color-border-strong: var(--paper-edge-2);
    --color-accent: var(--caramel);
    --color-accent-soft: var(--caramel-soft);
    --qiwi-red: var(--hue-red);
    --qiwi-orange: var(--hue-orange);
    --qiwi-yellow: var(--hue-yellow);
    --qiwi-green: var(--hue-green);
    --qiwi-cyan: var(--hue-cyan);
    --qiwi-blue: var(--hue-blue);
    --qiwi-purple: var(--hue-purple);
    --qiwi-red-bg: var(--hue-red-bg);
    --qiwi-orange-bg: var(--hue-orange-bg);
    --qiwi-yellow-bg: var(--hue-yellow-bg);
    --qiwi-green-bg: var(--hue-green-bg);
    --qiwi-cyan-bg: var(--hue-cyan-bg);
    --qiwi-blue-bg: var(--hue-blue-bg);
    --qiwi-purple-bg: var(--hue-purple-bg);

    /* 字体 */
    --font-sans: "HarmonyOS Sans", "HarmonyOS Sans SC", "Inter", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
    --font-serif: "Fraunces", Georgia, "Times New Roman", serif; /* reserved for home hero display */
    --font-mono: "JetBrains Mono", "Maple Mono NF CN", "Cascadia Code", "Fira Code", Consolas, monospace;

    /* 字阶 */
    --t-micro: 11px;
    --t-xs: 12px;
    --t-sm: 13px;
    --t-base: 15px;
    --t-body: 17px;
    --t-md: 18px;
    --t-lg: 22px;
    --t-title: 24px;
    --t-xl: 28px;
    --t-2xl: 36px;
    --t-3xl: 42px;
    --t-4xl: 56px;

    /* 间距 */
    --s-1: 4px;
    --s-2: 8px;
    --s-3: 12px;
    --s-4: 16px;
    --s-5: 24px;
    --s-6: 32px;
    --s-7: 48px;
    --s-8: 64px;
    --s-9: 96px;
    --s-10: 128px;
    --spacing-unit: var(--s-2);

    /* 圆角 */
    --r-0: 0;
    --r-sm: 4px;
    --r-md: 8px;
    --r-lg: 12px;
    --r-pill: 999px;
    --radius: var(--r-lg);

    /* 动效 */
    --ease: cubic-bezier(0.25, 0.1, 0.25, 1);
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
    --dur-fast: 160ms;
    --dur-base: 240ms;
    --dur-slow: 420ms;
    --transition: var(--dur-base) var(--ease);
}

/* 浅色模式 */
[data-theme="light"] {
    --paper: #fafaf9;
    --paper-deep: #f4f3f0;
    --surface: #ffffff;
    --paper-edge: #e4e4e7;
    --paper-edge-2: #d4d4d6;
    --ink: #3f3f46;
    --ink-soft: #71717a;
    --ink-faint: #696971;
    --caramel: #8b7355;
    --caramel-soft: #d4c4b0;
    --hue-red: #c84f61;
    --hue-orange: #bf6b2f;
    --hue-yellow: #9d8208;
    --hue-green: #4f8b48;
    --hue-cyan: #258b86;
    --hue-blue: #3f7bc6;
    --hue-purple: #7e58c2;
    --hue-red-bg: rgba(200, 79, 97, 0.16);
    --hue-orange-bg: rgba(191, 107, 47, 0.16);
    --hue-yellow-bg: rgba(157, 130, 8, 0.17);
    --hue-green-bg: rgba(79, 139, 72, 0.15);
    --hue-cyan-bg: rgba(37, 139, 134, 0.15);
    --hue-blue-bg: rgba(63, 123, 198, 0.15);
    --hue-purple-bg: rgba(126, 88, 194, 0.15);
}

/* ============================================
   基础样式
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    overflow-x: clip;
}

body {
    font-family: var(--font-sans);
    font-size: var(--t-body);
    line-height: 1.7;
    color: var(--color-text-primary);
    background: var(--color-bg);
    overflow-x: clip;
    text-rendering: optimizeLegibility;
    transition: background var(--transition), color var(--transition);
}

html.comment-profile-open,
body.comment-profile-open {
    overflow: hidden;
    overscroll-behavior: none;
}

a {
    color: inherit;
    text-decoration: none;
}

button,
input,
textarea,
select {
    font: inherit;
}

img {
    max-width: 100%;
}

::selection {
    background: var(--qiwi-cyan-bg);
    color: var(--color-text-primary);
}

.home-hero-line::selection,
.home-hero-line *::selection {
    background: var(--color-bg-deep);
    color: var(--home-hero-selection-color, var(--color-accent));
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 1ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
        transition-duration: 1ms !important;
    }
}

/* ============================================
   设计系统工具类
   ============================================ */
.qiwi-section {
    padding: var(--s-9) 0 var(--s-7);
    border-top: 1px solid var(--color-border);
}

.qiwi-section:first-child {
    border-top: 0;
    padding-top: var(--s-4);
}

.qiwi-eyebrow {
    display: flex;
    align-items: baseline;
    gap: var(--s-3);
    font-family: var(--font-mono);
    font-size: var(--t-micro);
    font-weight: 500;
    letter-spacing: 0.18em;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    margin-bottom: var(--s-4);
}

.qiwi-eyebrow::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--color-border);
}

.qiwi-lead {
    max-width: 60ch;
    font-size: var(--t-md);
    line-height: 1.65;
    color: var(--color-text-secondary);
}

.qiwi-code-tag {
    display: inline-block;
    padding: 1px 6px;
    font-family: var(--font-mono);
    font-size: var(--t-xs);
    color: var(--color-text-secondary);
    background: var(--color-bg-deep);
    border-radius: var(--r-sm);
}

/* ============================================
   顶部导航栏
   ============================================ */
.navbar {
    position: sticky;
    top: 0;
    background: rgba(24, 24, 27, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    z-index: 100;
    transition: background var(--transition), border-color var(--transition);
}

[data-theme="light"] .navbar {
    background: rgba(250, 250, 249, 0.95);
}

.navbar-inner {
    max-width: 1600px;
    margin: 0 auto;
    padding: var(--s-3) var(--s-6);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--s-5);
}

.navbar-title {
    font-family: var(--font-sans);
    font-size: var(--t-md);
    font-weight: 600;
    color: var(--color-text-primary);
    letter-spacing: -0.01em;
    flex-shrink: 0;
}

.navbar-title a {
    display: inline-flex;
    align-items: center;
    gap: var(--s-2);
    color: inherit;
}

.navbar-avatar {
    width: 34px;
    height: 34px;
    border-radius: var(--r-pill);
    object-fit: cover;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    flex-shrink: 0;
}

.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    padding: 0;
    border: 1px solid var(--color-border);
    border-radius: var(--r-md);
    background: var(--color-surface);
    color: var(--color-text-primary);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 4px;
    transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.nav-toggle:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.nav-toggle-bar {
    display: block;
    width: 18px;
    height: 2px;
    border-radius: var(--r-pill);
    background: currentColor;
    transition: transform var(--transition), opacity var(--transition);
}

.nav-links {
    display: flex;
    gap: var(--s-5);
    list-style: none;
    align-items: center;
    min-width: 0;
}

.nav-links li {
    position: relative;
    display: flex;
    align-items: center;
}

.nav-item-row {
    display: flex;
    align-items: center;
}

.nav-links a {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-family: var(--font-sans);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--t-base);
    line-height: 1;
    transition: color var(--transition);
    white-space: nowrap;
}

.nav-links i {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.05em;
    height: 1.05em;
    font-size: 0.95em;
    text-align: center;
    line-height: 1;
    transform: translateY(0.03em);
    flex-shrink: 0;
}

.nav-links svg {
    display: block;
    width: 1em;
    height: 1em;
    margin-right: 0 !important;
    vertical-align: middle !important;
    flex-shrink: 0;
}

.nav-links a:hover,
.nav-links a.current {
    color: var(--color-accent);
}

.nav-caret {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 0.55em;
    height: 0.55em;
    border-right: 1.5px solid currentColor;
    border-bottom: 1.5px solid currentColor;
    color: currentColor;
    opacity: 0.5;
    transform: rotate(45deg) translateY(-0.08em);
    flex-shrink: 0;
    transition: transform var(--transition), opacity var(--transition);
}

.nav-submenu-toggle {
    display: none;
}

.nav-submenu {
    position: absolute;
    top: calc(100% + var(--s-2));
    left: 50%;
    z-index: 120;
    min-width: 144px;
    padding: var(--s-3);
    list-style: none;
    background: rgba(24, 24, 27, 0.98);
    border: 1px solid var(--color-border);
    border-radius: var(--r-md);
    box-shadow: none;
    opacity: 0;
    visibility: hidden;
    transform: translate(-50%, 4px);
    transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
}

.nav-submenu::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: calc(var(--s-2) * -1);
    height: var(--s-2);
}

[data-theme="light"] .nav-submenu {
    background: rgba(250, 250, 249, 0.98);
}

.nav-item-has-children:hover .nav-submenu,
.nav-item-has-children:focus-within .nav-submenu {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, 0);
}

.nav-submenu a {
    display: flex;
    width: 100%;
    padding: var(--s-2) var(--s-3);
    border-radius: var(--r-sm);
}

.nav-submenu a:hover,
.nav-submenu a.current {
    background: var(--color-surface);
}

.theme-toggle {
    font-family: var(--font-sans);
    background: none;
    border: none;
    color: var(--color-text-secondary);
    cursor: pointer;
    font-size: var(--t-md);
    line-height: 1;
    padding: 8px;
    transition: color var(--transition);
    min-width: 40px;
}

.theme-toggle:hover {
    color: var(--color-accent);
}

/* ============================================
   主页 - 4 列布局系统
   ============================================ */
.home-hero {
    min-height: 84vh;
    min-height: 84svh;
    display: flex;
    align-items: center;
}

.home-hero-inner {
    width: 100%;
    max-width: 1600px;
    margin: 0 auto;
    padding: var(--s-9) var(--s-6) var(--s-8);
    text-align: center;
}

.home-hero-eyebrow {
    margin-bottom: var(--s-6);
    font-family: var(--font-mono);
    font-size: var(--t-sm);
    color: var(--color-text-secondary);
    letter-spacing: 0;
}

.home-hero-title {
    min-height: 2.2em;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--s-5);
    max-width: 12em;
    font-size: 86px;
    font-weight: 800;
    line-height: 1.05;
    color: var(--color-text-primary);
    letter-spacing: 0;
}

.home-hero-line {
    --home-hero-selection-color: var(--color-accent);
    display: block;
    transition: opacity var(--dur-base) var(--ease), transform var(--dur-base) var(--ease);
}

.home-hero-line.is-typewriter::after {
    content: "";
    display: inline-block;
    width: 0.08em;
    height: 0.82em;
    margin-left: 0.08em;
    border-radius: var(--r-pill);
    background: currentColor;
    vertical-align: -0.08em;
    animation: home-hero-cursor-blink 1s steps(1, end) infinite;
}

.home-hero-line.is-switching {
    opacity: 0;
    transform: translateY(8px);
}

@keyframes home-hero-cursor-blink {
    0%, 50% {
        opacity: 1;
    }
    51%, 100% {
        opacity: 0;
    }
}

.home-hero-accent-caramel { color: var(--caramel); }
.home-hero-accent-red { color: var(--hue-red); }
.home-hero-accent-orange { color: var(--hue-orange); }
.home-hero-accent-yellow { color: var(--hue-yellow); }
.home-hero-accent-green { color: var(--hue-green); }
.home-hero-accent-cyan { color: var(--hue-cyan); }
.home-hero-accent-blue { color: var(--hue-blue); }
.home-hero-accent-purple { color: var(--hue-purple); }

.home-hero-quote {
    max-width: 48em;
    margin: 0 auto var(--s-6);
    color: var(--color-text-secondary);
    font-size: var(--t-md);
    line-height: 1.8;
}

.home-hero-actions {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--s-3);
}

.home-hero-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 var(--s-5);
    border-radius: var(--r-pill);
    border: 1px solid var(--color-border);
    font-size: var(--t-base);
    color: var(--color-text-primary);
    text-decoration: none;
    transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.home-hero-button-primary {
    background: var(--color-text-primary);
    border-color: var(--color-text-primary);
    color: var(--color-bg);
}

.home-hero-button-primary:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-bg);
}

.home-hero-button-secondary:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
}

.home-hero-scroll {
    display: block;
    width: 6px;
    height: 6px;
    margin: var(--s-9) auto 0;
    border-radius: var(--r-pill);
    background: var(--color-accent);
}

.home-section-header {
    margin-bottom: var(--s-6);
    scroll-margin-top: calc(var(--s-8) + var(--s-6));
}

.home-section-eyebrow {
    margin-bottom: var(--s-2);
    font-size: var(--t-sm);
    color: var(--color-accent);
}

.home-section-header h2 {
    margin: 0;
    color: var(--color-text-primary);
    font-size: var(--t-2xl);
    line-height: 1.2;
    letter-spacing: 0;
}

.main-layout {
    max-width: 1600px;
    margin: 0 auto;
    padding: var(--s-8) var(--s-6);
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 4.2fr) minmax(280px, 1.5fr) minmax(0, 1fr);
    gap: var(--s-6);
}

.main-layout > *,
.article-page > *,
.about-page > *,
.timemachine-page > *,
.friends-page > * {
    min-width: 0;
}

.layout-spacer-left {
    /* 左侧留白 */
}

.main-content {
    /* 主要内容区 */
}

.sidebar {
    /* 侧边栏 */
}

.home-main-layout.has-home-section-header .sidebar {
    /* Align the sidebar with the first post title, below the home section heading. */
    margin-top: calc((var(--t-sm) * 1.5) + var(--s-2) + (var(--t-2xl) * 1.2) + var(--s-6) + var(--s-7));
}

.layout-spacer-right {
    /* 右侧留白 */
}

.main-layout.has-jike .home-jike {
    grid-column: 2 / 4;
    grid-row: 1;
}

.main-layout.has-jike .layout-spacer-left {
    grid-column: 1 / 2;
    grid-row: 1 / 3;
}

.main-layout.has-jike .layout-spacer-right {
    grid-column: 4 / 5;
    grid-row: 1 / 3;
}

.main-layout.has-jike .main-content {
    grid-column: 2 / 3;
    grid-row: 2;
}

.main-layout.has-jike .sidebar {
    grid-column: 3 / 4;
    grid-row: 2;
}

/* ============================================
   首页即刻条 - 共用样式
   ============================================ */
.home-jike {
    min-width: 0;
}

.home-jike-shell {
    --jike-row-height: 48px;
    position: relative;
}

.home-jike-viewport {
    height: var(--jike-row-height);
    overflow: hidden;
}

.home-jike-track {
    will-change: transform;
}

.home-jike-item {
    min-height: var(--jike-row-height);
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: calc(var(--spacing-unit) * 2);
    color: inherit;
    text-decoration: none;
}

.home-jike-item:hover .home-jike-text {
    color: var(--color-accent);
}

.home-jike-label {
    font-size: var(--t-sm);
    font-weight: 500;
    color: var(--color-text-tertiary);
    display: inline-flex;
    align-items: center;
    gap: var(--s-2);
    white-space: nowrap;
    letter-spacing: 0.02em;
}

.home-jike-label::before {
    content: "";
    width: 2px;
    height: 12px;
    border-radius: var(--r-pill);
    background: var(--color-accent-soft);
    flex-shrink: 0;
}

.home-jike-text {
    min-width: 0;
    font-size: var(--t-base);
    color: var(--color-text-secondary);
    line-height: 1.5;
    transition: color var(--transition);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.home-jike-date {
    justify-self: end;
    font-size: var(--t-xs);
    color: var(--color-text-tertiary);
    font-family: var(--font-mono);
    white-space: nowrap;
    opacity: 0.7;
}

/* --- top 模式 --- */
.main-layout.has-jike .home-jike-item {
    padding: 0 calc(var(--spacing-unit) * 4);
}

/* --- inline 模式 --- */
.main-content > .home-jike {
    margin-bottom: var(--s-2);
}

/* ============================================
   侧边栏标题
   ============================================ */
.sidebar-header {
    margin-bottom: var(--s-8);
    padding-bottom: var(--s-4);
    border-bottom: 1px solid var(--color-border);
    transition: border-color var(--transition);
}

.site-title {
    font-size: var(--t-title);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--s-2);
    letter-spacing: -0.02em;
}

.site-motto {
    font-size: var(--t-sm);
    color: var(--color-text-tertiary);
    font-weight: normal;
    line-height: 1.55;
}

/* 一言打字机效果 */
.site-motto-wrapper .site-motto {
    min-height: 39px;
    margin-bottom: 0;
    cursor: pointer;
    transition: opacity var(--transition);
}

.site-motto-wrapper .site-motto:hover {
    opacity: 0.8;
}

.motto-text {
    display: inline;
}

.typing-cursor {
    display: inline;
    color: var(--color-accent);
    font-weight: 300;
    animation: cursor-blink 1s step-end infinite;
}

@keyframes cursor-blink {
    0%, 50% {
        opacity: 1;
    }
    51%, 100% {
        opacity: 0;
    }
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ============================================
   侧边栏样式
   ============================================ */
.sidebar {
    padding-left: var(--s-6);
}

.sidebar-sticky {
    position: sticky;
    top: calc(var(--s-8) + var(--s-7));
}

.sidebar-section {
    margin-bottom: var(--s-7);
}

.sidebar-profile-card {
    display: grid;
    justify-items: center;
    gap: var(--s-4);
    padding: 0 0 var(--s-7);
    margin-bottom: var(--s-7);
    border-bottom: 1px solid var(--color-border);
    text-align: center;
}

.sidebar-profile-avatar {
    width: 80px;
    height: 80px;
    border-radius: var(--r-pill);
    object-fit: cover;
    border: 1px solid var(--color-border);
    background: var(--color-bg-deep);
}

.sidebar-profile-body {
    min-width: 0;
}

.sidebar-profile-name {
    margin: var(--s-4) 0 var(--s-3);
    color: var(--color-text-primary);
    font-size: var(--t-lg);
    line-height: 1.25;
    letter-spacing: 0;
}

.sidebar-profile-name::after {
    display: none;
}

.sidebar-profile-quote {
    margin: 0;
    color: var(--color-text-secondary);
    font-size: var(--t-sm);
    line-height: 1.8;
}

.sidebar-profile-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--s-2);
    margin-top: var(--s-6);
}

.sidebar-profile-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: var(--r-pill);
    border: 1px solid var(--color-border);
    background: transparent;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.sidebar-profile-links svg {
    width: 16px;
    height: 16px;
    display: block;
    fill: currentColor;
}

.sidebar-profile-links a:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    background: var(--color-surface);
}

.sidebar-announcement {
    padding: 0 0 var(--s-2);
}

.sidebar-announcement-body {
    display: grid;
    gap: var(--s-2);
    color: var(--color-text-secondary);
    font-size: var(--t-sm);
    line-height: 1.75;
}

.sidebar-announcement-body p {
    margin: 0;
}

.sidebar-announcement-body span[id^="busuanzi_"] {
    color: var(--color-accent);
    font-family: var(--font-mono);
    font-weight: 600;
}

.sidebar-title {
    font-size: var(--t-base);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--s-4);
    letter-spacing: -0.01em;
    display: flex;
    align-items: center;
}

.sidebar-title::before {
    content: "";
    display: inline-block;
    width: 3px;
    height: 16px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
    margin-right: var(--s-2);
    flex-shrink: 0;
}

.sidebar-title a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition);
}

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

.sidebar-list {
    list-style: none;
}

.sidebar-list li {
    margin-bottom: var(--s-3);
}

.sidebar-list a {
    font-size: var(--t-base);
    line-height: 1.65;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition);
    display: block;
}

.recent-post-list a {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sidebar-list a:hover {
    color: var(--color-accent);
}

.sidebar-list .item-count {
    font-size: var(--t-sm);
    color: var(--color-text-tertiary);
    margin-left: var(--s-2);
    font-family: var(--font-mono);
}

.cat {
    display: inline-flex;
    align-items: baseline;
    gap: 6px;
    max-width: 100%;
    font-size: var(--t-base);
    color: var(--ink-soft);
    cursor: pointer;
    text-decoration: none;
    transition: color var(--dur-fast) var(--ease);
}

.cat:hover {
    color: var(--caramel);
}

.cat::before {
    content: "#";
    color: var(--ink-faint);
}

.cat-plain::before {
    content: none;
}

.cat-name {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.cat .count {
    font-family: var(--font-mono);
    font-size: var(--t-micro);
    color: var(--ink-faint);
}

.cat::before,
.cat .count {
    transition: color var(--dur-fast) var(--ease);
}

.cat:hover::before,
.cat:hover .count {
    color: var(--caramel);
}

.sidebar-more-link {
    display: inline-flex;
    margin-top: var(--s-2);
    font-size: var(--t-sm);
    color: var(--color-text-tertiary);
    text-decoration: none;
    transition: color var(--transition);
}

.sidebar-more-link:hover {
    color: var(--color-accent);
}

.sidebar-jike-list {
    list-style: none;
    margin: 0;
    padding: var(--s-2) 0 0 var(--s-4);
    border-left: 1px solid var(--color-border);
}

.sidebar-jike-item {
    position: relative;
    margin-bottom: var(--s-5);
}

.sidebar-jike-item:last-child {
    margin-bottom: var(--s-3);
}

.sidebar-jike-item::before {
    content: "";
    position: absolute;
    left: calc(-1 * var(--s-4) - 5px);
    top: 0.45em;
    width: 8px;
    height: 8px;
    border-radius: var(--r-pill);
    border: 1px solid var(--color-accent);
    background: var(--color-bg);
}

.sidebar-jike-item a {
    display: grid;
    gap: var(--s-1);
    color: inherit;
    text-decoration: none;
}

.sidebar-jike-item time {
    font-family: var(--font-mono);
    font-size: var(--t-xs);
    color: var(--color-text-secondary);
}

.sidebar-jike-item span {
    display: -webkit-box;
    overflow: hidden;
    color: var(--color-text-tertiary);
    font-size: var(--t-sm);
    line-height: 1.65;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    transition: color var(--transition);
}

.sidebar-jike-item a:hover span {
    color: var(--color-accent);
}

/* ============================================
   文章列表 - 非卡片设计
   ============================================ */
.article-list {
    list-style: none;
}

.article-item {
    padding: var(--s-6) 0;
    border-bottom: 1px solid var(--color-border);
    transition: transform var(--transition), border-bottom-color var(--transition);
    position: relative;
    cursor: pointer;
}

.article-item:hover {
    transform: translateX(6px);
}

.article-item:first-child {
    padding-top: 0;
}

/* 有头图的文章 - 左右布局 */
.article-item-inner {
    display: flex;
    gap: 0;
    align-items: stretch;
    min-height: 160px;
}

.article-content {
    flex: 0 0 70%;
    padding-right: var(--s-6);
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: var(--s-4);
    min-width: 0;
}

/* 当文章没有头图时，文字内容占满整个区域 */
.article-item-inner .article-content:only-child {
    flex: 0 0 100%;
    padding-right: 0;
}

/* 头图容器 */
.article-thumbnail-wrapper {
    flex: 0 0 30%;
    position: relative;
    overflow: hidden;
    min-width: 0;
}

.article-thumbnail {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    border-radius: var(--r-md);
}

.article-meta {
    display: flex;
    gap: var(--s-2);
    font-size: var(--t-sm);
    color: var(--color-text-tertiary);
    margin: 0;
    flex-wrap: wrap;
    align-items: center;
}

.article-meta span::after {
    content: "·";
    margin-left: var(--s-2);
    color: var(--color-border);
}

.article-meta span:last-child::after {
    content: "";
}

.article-meta .meta-category {
    display: inline-flex;
    align-items: center;
    gap: var(--s-1);
}

.article-meta .meta-category a {
    display: inline-flex;
    align-items: center;
    max-width: 100%;
    padding: 0;
    color: var(--term-color, var(--color-accent));
    font-weight: 600;
    line-height: 1.5;
    text-decoration: none;
    transition: color var(--transition);
}

.article-meta .meta-category a:hover {
    color: var(--term-color, var(--color-accent));
}

.article-meta .meta-sticky {
    color: var(--color-accent);
    font-weight: 600;
}

.article-title {
    font-size: var(--t-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin: 0;
    line-height: 1.4;
    letter-spacing: -0.02em;
}

.article-title-link {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition);
}

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

.article-excerpt {
    font-size: var(--t-base);
    color: var(--color-text-secondary);
    line-height: 1.78;
    margin: 0;
}

.site-title,
.article-title,
.article-header-title,
.archive-title,
.page-title,
.about-name,
.friend-name,
.post-title-link,
.comment-author,
.footer-info p,
.page-intro,
.article-excerpt,
.comment-text,
.moment-text,
.friend-desc {
    overflow-wrap: anywhere;
}

.article-tags {
    display: flex;
    column-gap: var(--s-2);
    row-gap: var(--s-2);
    flex-wrap: wrap;
    margin-top: 0;
}

.article-tags a {
    display: inline-flex;
    align-items: center;
    font-size: var(--t-sm);
    color: var(--term-color, var(--color-text-secondary));
    background: var(--term-bg, var(--color-bg-deep));
    padding: 4px 9px;
    border-radius: var(--r-pill);
    text-decoration: none;
    font-weight: 600;
    line-height: 1.45;
    transition: color var(--transition), background var(--transition), transform var(--transition);
    position: relative;
    z-index: 2;
}

.article-tags a::before {
    content: "#";
    margin-right: 2px;
}

.article-tags a:hover {
    color: var(--term-color, var(--color-accent));
    transform: translateY(-1px);
}

.sidebar .article-tags a,
.article-tags a.tag-plain {
    background: transparent;
    padding: 4px 0;
    border-radius: 0;
}

.sidebar .article-tags a:hover,
.article-tags a.tag-plain:hover {
    transform: none;
}

.qiwi-term-red {
    --term-color: var(--hue-red);
    --term-bg: var(--hue-red-bg);
}

.qiwi-term-orange {
    --term-color: var(--hue-orange);
    --term-bg: var(--hue-orange-bg);
}

.qiwi-term-yellow {
    --term-color: var(--hue-yellow);
    --term-bg: var(--hue-yellow-bg);
}

.qiwi-term-green {
    --term-color: var(--hue-green);
    --term-bg: var(--hue-green-bg);
}

.qiwi-term-cyan {
    --term-color: var(--hue-cyan);
    --term-bg: var(--hue-cyan-bg);
}

.qiwi-term-blue {
    --term-color: var(--hue-blue);
    --term-bg: var(--hue-blue-bg);
}

.qiwi-term-purple {
    --term-color: var(--hue-purple);
    --term-bg: var(--hue-purple-bg);
}

/* ============================================
   文章页
   ============================================ */
.article-page {
    max-width: 1600px;
    margin: 0 auto;
    padding: var(--s-8) var(--s-6);
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 3fr) minmax(0, 1fr);
    gap: var(--s-6);
}

.article-page.has-toc,
.about-page.has-toc,
.timemachine-page.has-toc,
.friends-page.has-toc {
    grid-template-columns: minmax(0, 1fr) 180px;
    max-width: 1174px;
}

.article-main {
    grid-column: 2 / 3;
}

.article-page.has-toc .article-main,
.about-page.has-toc .about-main,
.timemachine-page.has-toc .timemachine-main,
.friends-page.has-toc .friends-main {
    grid-column: 1 / 2;
}

.article-page.has-toc .article-toc,
.about-page.has-toc .article-toc,
.timemachine-page.has-toc .article-toc,
.friends-page.has-toc .article-toc {
    grid-column: 2 / 3;
}

.article-page.has-toc .layout-spacer-left,
.article-page.has-toc .layout-spacer-right,
.about-page.has-toc .layout-spacer-left,
.about-page.has-toc .layout-spacer-right,
.timemachine-page.has-toc .layout-spacer-left,
.timemachine-page.has-toc .layout-spacer-right,
.friends-page.has-toc .layout-spacer-left,
.friends-page.has-toc .layout-spacer-right {
    display: none;
}

.article-header {
    margin-bottom: var(--s-7);
}

.article-header-title {
    font-size: var(--t-3xl);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text-primary);
    letter-spacing: -0.03em;
    margin-bottom: var(--s-6);
}

.article-header-meta {
    display: flex;
    align-items: center;
    gap: var(--s-3);
    padding-bottom: var(--s-4);
    border-bottom: 1px solid var(--color-border);
    transition: border-color var(--transition);
    font-size: var(--t-base);
    color: var(--color-text-secondary);
}

.author-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
}

.author-info {
    flex: 1;
}

.author-name {
    font-size: var(--t-base);
    font-weight: 600;
    color: var(--color-text-primary);
    display: block;
    margin-bottom: 4px;
}

.post-date {
    font-size: var(--t-sm);
    color: var(--color-text-tertiary);
}

.post-date a {
    color: inherit;
    text-decoration: none;
}

.post-date a:hover,
.post-date a:focus-visible {
    color: var(--color-accent);
}

/* 文章头图 */
.article-hero {
    display: block;
    width: 100%;
    max-height: 480px;
    object-fit: cover;
    margin: 0 0 var(--s-6);
    border-radius: var(--radius);
}

/* ============================================
   文章页 TOC 目录
   ============================================ */
.article-toc {
    /* Grid cell stretches to full row height; inner wrapper handles sticky */
}

.article-toc:empty {
    display: none;
}

.toc-inner {
    position: sticky;
    top: calc(var(--s-8) + var(--s-7));
    max-height: calc(100vh - var(--s-10));
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--color-border) transparent;
    padding-right: var(--s-2);
}

.toc-back-top,
.toc-go-comments {
    display: flex;
    align-items: center;
    gap: var(--s-2);
    font-size: var(--t-xs);
    color: var(--color-text-tertiary);
    cursor: pointer;
    background: none;
    border: none;
    padding: var(--s-3) 0;
    transition: color var(--transition);
    font-family: inherit;
}

.toc-back-top:hover,
.toc-go-comments:hover {
    color: var(--color-accent);
}

.toc-back-top svg,
.toc-go-comments svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

.toc-title {
    font-size: var(--t-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-tertiary);
    margin-bottom: var(--s-2);
    padding-top: var(--s-2);
}

.toc-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.toc-item {
    margin-bottom: calc(var(--spacing-unit) * 0.5);
}

.toc-link {
    font-size: var(--t-sm);
    color: var(--color-text-tertiary);
    text-decoration: none;
    line-height: 1.5;
    display: block;
    padding: 4px 0;
    transition: color var(--transition);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.toc-link:hover {
    color: var(--color-text-secondary);
}

.toc-link.is-active {
    color: var(--color-accent);
    font-weight: 500;
}

.toc-item.level-3 .toc-link {
    padding-left: var(--s-4);
    font-size: var(--t-xs);
}

.toc-item.level-4 .toc-link {
    padding-left: var(--s-6);
    font-size: var(--t-xs);
}

.toc-separator {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: var(--s-2) 0;
}

/* 文章内容 */
.article-body {
    max-width: 960px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: var(--s-9);
    overflow-wrap: break-word;
}

/* 标题样式 */
.article-body h1 {
    font-size: var(--t-2xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin: var(--s-9) 0 var(--s-5);
    letter-spacing: -0.03em;
    line-height: 1.3;
}

.article-body h2 {
    font-size: var(--t-xl);
    font-weight: 600;
    color: var(--color-text-primary);
    margin: var(--s-8) 0 var(--s-4);
    letter-spacing: -0.02em;
    line-height: 1.3;
    scroll-margin-top: var(--s-10);
}

.article-body h3 {
    font-size: var(--t-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin: var(--s-7) 0 var(--s-3);
    letter-spacing: -0.02em;
    line-height: 1.4;
    scroll-margin-top: var(--s-10);
}

.article-body h4 {
    font-size: var(--t-md);
    font-weight: 600;
    color: var(--color-text-primary);
    margin: var(--s-6) 0 var(--s-3);
    letter-spacing: -0.01em;
    line-height: 1.4;
    scroll-margin-top: var(--s-10);
}

.article-body h5 {
    font-size: var(--t-body);
    font-weight: 600;
    color: var(--color-text-primary);
    margin: var(--s-5) 0 var(--s-2);
    line-height: 1.5;
}

.article-body h6 {
    font-size: var(--t-base);
    font-weight: 600;
    color: var(--color-text-secondary);
    margin: var(--s-5) 0 var(--s-2);
    line-height: 1.5;
}

/* 段落 */
.article-body p {
    font-size: var(--t-body);
    line-height: 1.75;
    color: var(--color-text-primary);
    margin-bottom: var(--s-4);
}

/* 文本样式 */
.article-body strong {
    font-weight: 600;
    color: var(--color-text-primary);
}

.article-body em {
    font-style: italic;
}

.article-body del,
.article-body s {
    text-decoration: line-through;
    color: var(--color-text-tertiary);
}

.article-body sup {
    font-size: 0.75em;
    vertical-align: super;
}

.article-body sub {
    font-size: 0.75em;
    vertical-align: sub;
}

.article-body abbr {
    text-decoration: underline dotted;
    cursor: help;
}

.article-body details,
.archive-description details,
.page-intro details,
.qiwi-fold {
    --qiwi-fold-duration: 360ms;
    margin: var(--s-5) 0;
    padding: var(--s-5) var(--s-5);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--r-md);
}

.article-body summary,
.archive-description summary,
.page-intro summary,
.qiwi-fold > summary {
    cursor: pointer;
    color: var(--color-text-primary);
    font-weight: 600;
    line-height: 1.6;
}

.article-body summary::marker,
.archive-description summary::marker,
.page-intro summary::marker,
.qiwi-fold > summary::marker {
    color: var(--color-accent);
}

.article-body details[open] > summary,
.archive-description details[open] > summary,
.page-intro details[open] > summary,
.qiwi-fold[open] > summary {
    margin-bottom: var(--s-2);
    padding-bottom: var(--s-2);
    border-bottom: 1px solid var(--color-border);
}

.qiwi-fold-no-divider[open] > summary {
    margin-bottom: var(--s-3);
    padding-bottom: 0;
    border-bottom: 0;
}

.qiwi-fold-body {
    overflow: hidden;
}

.qiwi-fold[open] > .qiwi-fold-body {
    animation: qiwi-fold-unfold var(--qiwi-fold-duration) var(--ease-out);
    transform-origin: top;
}

.qiwi-fold.is-animating > .qiwi-fold-body {
    will-change: height, opacity, transform;
}

.qiwi-fold-body > *:last-child,
.article-body details > *:last-child,
.archive-description details > *:last-child,
.page-intro details > *:last-child {
    margin-bottom: 0;
}

@keyframes qiwi-fold-unfold {
    0% {
        opacity: 0;
        transform: translateY(-4px) scaleY(0.98);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scaleY(1);
    }
}

.qiwi-text-red { color: var(--qiwi-red); }
.qiwi-text-orange { color: var(--qiwi-orange); }
.qiwi-text-yellow { color: var(--qiwi-yellow); }
.qiwi-text-green { color: var(--qiwi-green); }
.qiwi-text-cyan { color: var(--qiwi-cyan); }
.qiwi-text-blue { color: var(--qiwi-blue); }
.qiwi-text-purple { color: var(--qiwi-purple); }

.qiwi-mark {
    padding: 0.08em 0.32em;
    border-radius: var(--r-sm);
    box-decoration-break: clone;
    -webkit-box-decoration-break: clone;
}

.qiwi-mark-red { background: var(--qiwi-red-bg); }
.qiwi-mark-orange { background: var(--qiwi-orange-bg); }
.qiwi-mark-yellow { background: var(--qiwi-yellow-bg); }
.qiwi-mark-green { background: var(--qiwi-green-bg); }
.qiwi-mark-cyan { background: var(--qiwi-cyan-bg); }
.qiwi-mark-blue { background: var(--qiwi-blue-bg); }
.qiwi-mark-purple { background: var(--qiwi-purple-bg); }

.qiwi-badge,
.qiwi-callout,
.qiwi-button {
    --qiwi-component-color: var(--qiwi-cyan);
    --qiwi-component-bg: var(--qiwi-cyan-bg);
}

.qiwi-badge-red,
.qiwi-callout-red,
.qiwi-button-red {
    --qiwi-component-color: var(--qiwi-red);
    --qiwi-component-bg: var(--qiwi-red-bg);
}

.qiwi-badge-orange,
.qiwi-callout-orange,
.qiwi-button-orange {
    --qiwi-component-color: var(--qiwi-orange);
    --qiwi-component-bg: var(--qiwi-orange-bg);
}

.qiwi-badge-yellow,
.qiwi-callout-yellow,
.qiwi-button-yellow {
    --qiwi-component-color: var(--qiwi-yellow);
    --qiwi-component-bg: var(--qiwi-yellow-bg);
}

.qiwi-badge-green,
.qiwi-callout-green,
.qiwi-button-green {
    --qiwi-component-color: var(--qiwi-green);
    --qiwi-component-bg: var(--qiwi-green-bg);
}

.qiwi-badge-cyan,
.qiwi-callout-cyan,
.qiwi-button-cyan {
    --qiwi-component-color: var(--qiwi-cyan);
    --qiwi-component-bg: var(--qiwi-cyan-bg);
}

.qiwi-badge-blue,
.qiwi-callout-blue,
.qiwi-button-blue {
    --qiwi-component-color: var(--qiwi-blue);
    --qiwi-component-bg: var(--qiwi-blue-bg);
}

.qiwi-badge-purple,
.qiwi-callout-purple,
.qiwi-button-purple {
    --qiwi-component-color: var(--qiwi-purple);
    --qiwi-component-bg: var(--qiwi-purple-bg);
}

.qiwi-badge {
    display: inline-flex;
    align-items: center;
    min-height: 1.7em;
    padding: 0.08em 0.55em;
    border: 1px solid transparent;
    border-radius: var(--r-pill);
    color: var(--qiwi-component-color);
    font-size: 0.82em;
    font-weight: 600;
    line-height: 1.4;
    vertical-align: 0.08em;
    white-space: nowrap;
}

.qiwi-badge-soft {
    background: var(--qiwi-component-bg);
}

.qiwi-badge-outline {
    border-color: var(--qiwi-component-color);
}

.qiwi-badge-solid {
    color: var(--color-bg);
    background: var(--qiwi-component-color);
}

.qiwi-not-by-ai {
    display: inline-flex;
    align-items: center;
    gap: 0.42em;
    min-height: 1.9em;
    padding: 0.14em 0.62em;
    border: 1px solid var(--color-border-strong);
    border-radius: var(--r-sm);
    background: var(--color-bg);
    color: var(--color-text-primary);
    font-size: 0.78em;
    font-weight: 700;
    line-height: 1.2;
    text-decoration: none;
    vertical-align: baseline;
    white-space: nowrap;
}

.qiwi-not-by-ai span {
    padding: 0.08em 0.32em;
    border-radius: calc(var(--r-sm) - 2px);
    background: var(--color-text-primary);
    color: var(--color-bg);
    letter-spacing: 0.04em;
}

.qiwi-not-by-ai strong {
    font-weight: 700;
}

.post-endnote a.qiwi-not-by-ai:hover,
.qiwi-not-by-ai:hover {
    border-color: var(--color-accent-soft);
    background: var(--paper-soft);
    color: var(--color-text-primary);
}

.qiwi-callout {
    margin: var(--s-5) 0;
    padding: var(--s-4) var(--s-5);
    border: 1px solid var(--color-border);
    border-left: 3px solid var(--qiwi-component-color);
    border-radius: var(--r-lg);
    background: var(--color-surface);
}

.qiwi-callout-title {
    margin-bottom: var(--s-2);
    color: var(--color-text-primary);
    font-weight: 600;
}

.qiwi-callout-body > *:last-child {
    margin-bottom: 0;
}

.qiwi-callout-body {
    color: var(--color-text-secondary);
}

.qiwi-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--s-2);
    margin: var(--s-4) 0;
}

.qiwi-buttons-center {
    justify-content: center;
}

.qiwi-buttons-right {
    justify-content: flex-end;
}

.article-body a.qiwi-button,
.post-endnote a.qiwi-button,
.qiwi-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 36px;
    padding: 6px 12px;
    border: 1px solid var(--qiwi-component-color);
    border-radius: var(--r-md);
    color: var(--qiwi-component-color);
    background: transparent;
    font-size: var(--t-base);
    font-weight: 500;
    line-height: 1.35;
    text-decoration: none;
    transition: color var(--transition), border-color var(--transition), background var(--transition), transform var(--transition);
}

.article-body a.qiwi-button:hover,
.post-endnote a.qiwi-button:hover,
.qiwi-button:hover {
    background: var(--qiwi-component-bg);
    transform: translateY(-1px);
}

.qiwi-button-soft {
    background: var(--qiwi-component-bg);
}

.qiwi-button-solid {
    color: var(--color-bg);
    background: var(--qiwi-component-color);
}

.qiwi-button-ghost {
    border-color: transparent;
}

/* 链接 */
.article-body a {
    color: var(--color-accent);
    text-decoration: none;
    border-bottom: 1px solid var(--color-accent-soft);
    transition: color var(--transition), border-color var(--transition);
}

.article-body a:hover {
    border-bottom-color: var(--color-accent);
}

/* 水平线 */
.article-body hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: var(--s-7) 0;
}

/* 行内代码 */
.article-body code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    background: var(--color-surface);
    padding: 3px 6px;
    border-radius: var(--r-sm);
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
}

/* 代码块包装器（配合footer.php的JS） */
.code-block-wrapper {
    margin: var(--s-5) 0;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
}

.code-block-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--s-3) var(--s-4);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    transition: background var(--transition), border-color var(--transition);
}

.code-language {
    font-family: var(--font-mono);
    font-size: var(--t-sm);
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    font-weight: 500;
}

.copy-button {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    font-size: var(--t-sm);
    font-family: var(--font-sans);
    color: var(--color-text-secondary);
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--r-sm);
    cursor: pointer;
    transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.copy-button:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    background: var(--color-surface);
}

.copy-button.copied {
    color: var(--qiwi-green);
    border-color: var(--qiwi-green);
}

.copy-button svg {
    width: 14px;
    height: 14px;
}

/* 代码块 */
.article-body pre {
    background: var(--color-surface);
    padding: var(--s-5);
    overflow-x: auto;
    margin: 0;
    border-radius: 0;
}

.code-block-wrapper pre {
    border: none;
}

.article-body pre code {
    background: none;
    border: none;
    padding: 0;
    font-size: var(--t-base);
    line-height: 1.6;
}

/* 引用块 */
.article-body blockquote {
    border-left: 3px solid var(--color-accent-soft);
    padding-left: var(--s-4);
    margin: var(--s-5) 0;
    color: var(--color-text-secondary);
    font-style: italic;
}

.article-body blockquote p {
    margin-bottom: var(--s-2);
}

.article-body blockquote p:last-child {
    margin-bottom: 0;
}

/* 图片 */
.article-body img {
    max-width: 100%;
    height: auto;
    border: 1px solid var(--color-text-tertiary);
    border-color: color-mix(in srgb, var(--color-border) 72%, var(--color-text-secondary));
    border-radius: var(--radius);
    margin: var(--s-5) auto;
    display: block;
    box-shadow: none;
    cursor: zoom-in;
}

.article-body .qiwi-image-link {
    display: block;
    border-bottom: 0;
}

.qiwi-lightbox[hidden] {
    display: none;
}

.qiwi-lightbox {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: block;
    padding: calc(var(--spacing-unit) * 4);
    background: rgba(0, 0, 0, 0.82);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--transition), visibility 0s linear 0.3s;
}

[data-theme="light"] .qiwi-lightbox {
    background: rgba(250, 250, 249, 0.86);
}

.qiwi-lightbox.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transition: opacity var(--transition), visibility 0s;
}

.qiwi-lightbox-button {
    width: 100%;
    height: 100%;
    padding: 0;
    border: 0;
    background: transparent;
    color: inherit;
    cursor: zoom-out;
    display: flex;
    align-items: center;
    justify-content: center;
}

.qiwi-lightbox-image {
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    max-width: none;
    max-height: none;
    object-fit: contain;
    border: 1px solid rgba(255, 255, 255, 0.24);
    border-radius: var(--radius);
    box-shadow: none;
    opacity: 1;
    transform-origin: top left;
    will-change: transform, width, height;
    transition: transform 260ms cubic-bezier(0.22, 1, 0.36, 1);
}

[data-theme="light"] .qiwi-lightbox-image {
    border-color: rgba(63, 63, 70, 0.2);
}

.qiwi-lightbox.is-open .qiwi-lightbox-image {
    opacity: 1;
}

html.qiwi-lightbox-open,
body.qiwi-lightbox-open {
    overflow: hidden;
    overscroll-behavior: none;
}

body.qiwi-lightbox-open {
    width: 100%;
}

@media (prefers-reduced-motion: reduce) {
    .qiwi-lightbox,
    .qiwi-lightbox-image {
        transition: none;
    }
}

/* 列表 */
.article-body ul,
.article-body ol {
    padding-left: calc(var(--spacing-unit) * 4);
    margin-bottom: calc(var(--spacing-unit) * 3);
}

.article-body li {
    margin-bottom: calc(var(--spacing-unit) * 1.5);
    line-height: 1.8;
}

.article-body li > ul,
.article-body li > ol {
    margin-top: calc(var(--spacing-unit));
    margin-bottom: calc(var(--spacing-unit));
}

/* 任务列表 */
.article-body ul li {
    list-style: disc;
}

.article-body ol li {
    list-style: decimal;
}

.article-body input[type="checkbox"] {
    margin-right: calc(var(--spacing-unit));
    cursor: pointer;
}

/* 表格 */
.article-body table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin: var(--s-5) 0;
    font-size: 16px;
    overflow: hidden;
    border-radius: var(--r-md);
    border: 1px solid var(--color-border);
    background: var(--color-bg);
}

.article-body table thead {
    background: var(--color-bg-deep);
}

.article-body table thead th {
    font-weight: 600;
    color: var(--color-text-primary);
    text-align: left;
    padding: var(--s-3) var(--s-4);
    border-bottom: 1px solid var(--color-border);
    vertical-align: bottom;
}

.article-body table tbody tr {
    transition: background var(--transition);
}

.article-body table tbody tr:nth-child(odd) {
    background: var(--color-bg);
}

.article-body table tbody tr:nth-child(even) {
    background: color-mix(in srgb, var(--color-surface) 52%, transparent);
}

.article-body table tbody tr:hover {
    background: color-mix(in srgb, var(--color-surface) 82%, var(--color-bg));
}

.article-body table th,
.article-body table td {
    border-bottom: 1px solid var(--color-border);
}

.article-body table tbody tr:last-child td {
    border-bottom: 0;
}

.article-body table td {
    padding: var(--s-3) var(--s-4);
    color: var(--color-text-primary);
    vertical-align: top;
}

.article-body table th:not(:last-child),
.article-body table td:not(:last-child) {
    border-right: 1px solid color-mix(in srgb, var(--color-border) 56%, transparent);
}

.article-body table p:last-child,
.article-body table ul:last-child,
.article-body table ol:last-child {
    margin-bottom: 0;
}

.article-body table code {
    font-size: 0.85em;
}

/* 文章附注区 */
.post-endnote {
    width: 100%;
    max-width: 960px;
    margin: var(--s-8) auto 0;
    padding: var(--s-5);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--r-lg);
}

.post-endnote-label {
    display: block;
    margin-bottom: var(--s-3);
    color: var(--color-text-primary);
    font-size: var(--t-base);
    font-weight: 600;
}

.post-copyright-body {
    color: var(--color-text-secondary);
}

.post-copyright-body > br {
    display: none;
}

.post-copyright-body p {
    margin: 0 0 var(--s-3);
    font-size: var(--t-base);
    line-height: 1.7;
}

.post-copyright-body > *:last-child,
.post-copyright-body .qiwi-callout-body > *:last-child {
    margin-bottom: 0;
}

.post-endnote a {
    color: var(--color-accent);
    text-decoration: none;
    border-bottom: 1px solid var(--color-accent-soft);
    transition: color var(--transition), border-color var(--transition);
    overflow-wrap: anywhere;
}

.post-endnote a:hover {
    border-color: var(--color-accent);
}

.post-endnote .qiwi-callout {
    margin: var(--s-4) 0;
    background: var(--color-bg);
}

.post-copyright-default {
    display: block;
}

.post-copyright-component {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--s-2);
    margin-top: var(--s-3);
    padding: var(--s-3) var(--s-4);
    border: 1px solid var(--color-border);
    border-radius: var(--r-sm);
    background: var(--color-bg);
    color: var(--color-text-secondary);
    font-size: var(--t-sm);
    line-height: 1.6;
}

.post-copyright-component span {
    color: var(--color-text-tertiary);
    font-size: var(--t-xs);
    font-weight: 600;
}

.post-copyright-component strong {
    color: var(--color-text-primary);
    font-weight: 500;
}

.post-copyright-thread {
    border-color: color-mix(in srgb, var(--color-accent) 28%, var(--color-border));
    background: color-mix(in srgb, var(--color-accent-soft) 35%, var(--color-bg));
}

.post-copyright-thread a {
    font-weight: 600;
}

.post-copyright-no-repost {
    border-color: color-mix(in srgb, var(--qiwi-orange) 28%, var(--color-border));
    background: color-mix(in srgb, var(--qiwi-orange-bg) 45%, var(--color-bg));
}

.post-copyright-ai {
    border-color: color-mix(in srgb, var(--qiwi-purple) 24%, var(--color-border));
    background: color-mix(in srgb, var(--qiwi-purple-bg) 40%, var(--color-bg));
}

.post-copyright-ai span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 2.2em;
    min-height: 1.6em;
    border-radius: calc(var(--r-sm) - 2px);
    background: var(--color-text-primary);
    color: var(--color-bg);
    letter-spacing: 0;
}

.post-tags {
    display: flex;
    align-items: baseline;
    column-gap: var(--s-3);
    row-gap: var(--s-2);
    flex-wrap: wrap;
    margin-top: var(--s-5);
    padding-top: var(--s-4);
    border-top: 1px solid var(--color-border);
}

.post-tags .post-endnote-label {
    margin-bottom: 0;
    flex-shrink: 0;
}

/* 文章导航 */
.post-navigation {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--s-4);
    margin-top: var(--s-7);
}

.post-navigation-item {
    min-width: 0;
    padding-top: var(--s-3);
    border-top: 1px solid var(--color-border);
    color: inherit;
    text-decoration: none;
    transition: border-color var(--transition), transform var(--transition);
}

.post-navigation-item:not(.is-empty):hover {
    border-color: var(--color-accent);
}

.post-navigation-item.nav-previous:not(.is-empty):hover {
    transform: translateX(-4px);
}

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

.post-navigation-item.nav-next:not(.is-empty):hover {
    transform: translateX(4px);
}

.post-navigation-label {
    display: block;
    margin-bottom: var(--s-2);
    font-size: var(--t-sm);
    font-weight: 600;
    color: var(--color-text-tertiary);
}

.post-navigation-link,
.post-navigation-empty {
    display: block;
    color: var(--color-text-secondary);
    font-size: var(--t-base);
    line-height: 1.65;
    overflow-wrap: anywhere;
    text-decoration: none;
    transition: color var(--transition);
}

.post-navigation-item:not(.is-empty):hover .post-navigation-link {
    color: var(--color-accent);
}

.post-navigation-empty {
    color: var(--color-text-tertiary);
}

.post-navigation-item.is-empty {
    opacity: 0.72;
}

@media (max-width: 768px) {
    .post-navigation {
        grid-template-columns: 1fr;
        gap: var(--s-5);
    }

    .post-navigation-item.nav-next {
        text-align: left;
    }

    .post-navigation-item.nav-previous:not(.is-empty):hover,
    .post-navigation-item.nav-next:not(.is-empty):hover {
        transform: none;
    }
}

/* 密码保护文章 */
.article-body .protected {
    max-width: 480px;
    margin: calc(var(--spacing-unit) * 8) auto;
    padding: calc(var(--spacing-unit) * 6);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    text-align: center;
}

.protected .word {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: calc(var(--spacing-unit) * 4);
}

.protected p:last-child {
    margin-bottom: 0;
}

.protected input.text {
    width: 100%;
    padding: calc(var(--spacing-unit) * 2);
    font-size: 15px;
    font-family: var(--font-sans);
    color: var(--color-text-primary);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    margin-bottom: calc(var(--spacing-unit) * 3);
    transition: all var(--transition);
}

.protected input.text:focus {
    outline: none;
    border-color: var(--color-accent);
}

.protected input.submit {
    width: 100%;
    padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 4);
    font-size: 15px;
    font-weight: 500;
    font-family: var(--font-sans);
    color: var(--color-bg);
    background: var(--color-accent);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition);
}

.protected input.submit:hover {
    opacity: 0.9;
}

/* ============================================
   时光机页面
   ============================================ */
.timemachine-page,
.friends-page {
    max-width: 1600px;
    margin: 0 auto;
    padding: calc(var(--spacing-unit) * 8) calc(var(--spacing-unit) * 6);
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 3fr) minmax(0, 1fr);
    gap: calc(var(--spacing-unit) * 6);
}

.timemachine-main,
.friends-main {
    grid-column: 2 / 3;
}

.timemachine-header,
.friends-header {
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 8);
    padding-bottom: calc(var(--spacing-unit) * 6);
    border-bottom: 1px solid var(--color-border);
}

.timemachine-header .page-title,
.friends-header .page-title {
    font-size: 32px;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: calc(var(--spacing-unit) * 2);
    letter-spacing: -0.03em;
}

.page-intro {
    font-size: 16px;
    color: var(--color-text-secondary);
    margin-top: calc(var(--spacing-unit) * 2);
    line-height: 1.6;
}

.page-stats {
    margin-top: calc(var(--spacing-unit) * 3);
    font-size: 14px;
    color: var(--color-text-tertiary);
}

/* 说说列表 */
.moments-list {
    margin-bottom: calc(var(--spacing-unit) * 6);
}

.moment-item {
    display: flex;
    gap: var(--s-5);
    padding: calc(var(--spacing-unit) * 4) 0;
}

.moment-avatar {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
}

.moment-avatar img {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
}

.moment-content {
    flex: 1;
    min-width: 0;
}

.moment-header {
    display: flex;
    align-items: center;
    gap: var(--s-2);
    margin-bottom: calc(var(--spacing-unit));
}

.moment-author {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text-primary);
}

.moment-owner-badge {
    position: relative;
    isolation: isolate;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: 42%;
    background: var(--qiwi-blue);
    color: #fff;
    font-size: 10px;
    line-height: 1;
    vertical-align: text-bottom;
}

.moment-owner-badge::before,
.moment-owner-badge::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: inherit;
    z-index: -1;
}

.moment-owner-badge::before {
    transform: rotate(30deg);
}

.moment-owner-badge::after {
    transform: rotate(60deg);
}

.moment-owner-badge i {
    position: relative;
    z-index: 1;
    font-size: 9px;
    transform: translateY(0.5px);
}

.moment-owner-badge span {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
}

.moment-time {
    font-size: 13px;
    color: var(--color-text-tertiary);
}

.moment-text {
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text-primary);
}

.moment-text.article-body {
    max-width: none;
    margin-bottom: 0;
}

.moment-text.article-body p {
    margin: 0 0 var(--s-3);
    font-size: inherit;
    line-height: inherit;
}

.moment-text.article-body p:last-child {
    margin-bottom: 0;
}

.moment-text strong {
    font-weight: 600;
}

.moment-text em {
    font-style: italic;
}

.moment-text code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    background: var(--color-surface);
    padding: 2px 6px;
    border-radius: 4px;
}

.moment-text a {
    color: var(--color-accent);
    text-decoration: none;
    border-bottom: 1px solid var(--color-accent-soft);
}

.moment-text a:hover {
    border-bottom-color: var(--color-accent);
}

.moment-image {
    max-width: 100%;
    height: auto;
    border-radius: var(--r-md);
    display: block;
    margin: var(--s-2) 0;
}

.moment-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--s-3);
    margin-top: var(--s-3);
}

.moment-actions {
    display: inline-flex;
    align-items: center;
    gap: var(--s-2);
}

.moment-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    min-width: 32px;
    height: 32px;
    padding: 0 var(--s-2);
    border: 1px solid transparent;
    border-radius: var(--r-md);
    background: transparent;
    color: var(--color-text-tertiary);
    font-size: 13px;
    font-weight: 500;
    white-space: nowrap;
    transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.moment-action:hover,
.moment-action:focus-visible,
.moment-action[aria-expanded="true"] {
    color: var(--color-accent);
    border-color: color-mix(in srgb, var(--color-accent) 18%, transparent);
    background: color-mix(in srgb, var(--color-accent-soft) 38%, transparent);
    outline: none;
}

.moment-action:active {
    background: color-mix(in srgb, var(--color-accent-soft) 58%, transparent);
}

.moment-like-button.is-active {
    color: var(--qiwi-red);
}

.moment-action:disabled {
    cursor: not-allowed;
    opacity: 0.55;
}

.moment-comments {
    margin-top: var(--s-4);
    padding: var(--s-4);
    border: 1px solid var(--color-border);
    border-radius: var(--r-md);
    background: color-mix(in srgb, var(--color-surface) 68%, var(--color-bg));
}

.moment-comments:not(:has(.moment-comment)) {
    display: none;
}

.moment-comments-list {
    display: grid;
    gap: var(--s-3);
}

.moment-comments-list .moment-comments-list {
    margin-top: var(--s-2);
    padding-left: var(--s-4);
    border-left: 1px solid var(--color-border);
}

.moment-comment {
    display: flex;
    gap: var(--s-3);
}

.moment-comment-avatar {
    width: 34px;
    height: 34px;
    flex: 0 0 34px;
    border-radius: 50%;
    object-fit: cover;
}

.moment-comment-body {
    min-width: 0;
    flex: 1;
}

.moment-comment-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
    margin-bottom: 3px;
}

.moment-comment-author {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-primary);
}

.moment-comment-author-stack,
.moment-author-stack,
.comment-author-stack {
    display: inline-flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
}

.moment-comment-author-row,
.comment-author-row {
    display: inline-flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: var(--s-2);
}

.moment-comment-status-note,
.comment-status-note {
    color: var(--color-accent);
    font-size: 12px;
    font-weight: 500;
    line-height: 1.4;
}

.friends-apply-status {
    color: var(--color-accent);
    font-size: 13px;
    font-weight: 500;
    margin: calc(var(--spacing-unit) * 1.5) 0 0;
}

.moment-comment-time {
    font-size: 12px;
    color: var(--color-text-tertiary);
}

.moment-comment-location {
    font-size: 12px;
    color: var(--color-text-tertiary);
}

.moment-comment-text {
    font-size: 14px;
    line-height: 1.65;
    color: var(--color-text-secondary);
    overflow-wrap: anywhere;
}

.moment-comment-text code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    padding: 1px 5px;
    border-radius: var(--r-sm);
    background: var(--color-surface);
}

.moment-comment-reply {
    display: block;
    width: max-content;
    max-width: 100%;
    margin: 4px 0 0;
    padding: 0;
    border: 0;
    background: transparent;
    color: var(--color-text-tertiary);
    font-family: var(--font-sans);
    font-size: 12px;
    font-weight: 500;
    line-height: 1.6;
    text-align: left;
    cursor: pointer;
}

.moment-comment-reply:hover,
.moment-comment-reply:focus-visible {
    color: var(--color-accent);
    outline: none;
    text-decoration: underline;
    text-underline-offset: 3px;
}

.moment-reply-composer {
    margin-top: var(--s-4);
    width: 100%;
}

.moment-reply-form {
    display: grid;
    gap: var(--s-3);
    padding: calc(var(--spacing-unit) * 3);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
}

.moment-reply-profile-modal {
    margin-bottom: 0;
}

.moment-reply-profile-backdrop {
    display: none;
}

.moment-reply-profile-panel {
    padding: calc(var(--spacing-unit) * 3);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-bg);
}

.moment-reply-profile-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: calc(var(--spacing-unit) * 3);
    margin-bottom: calc(var(--spacing-unit) * 3);
}

.moment-reply-profile-header h4 {
    margin-bottom: 2px;
    color: var(--color-text-primary);
    font-size: 16px;
    font-weight: 600;
}

.moment-reply-profile-header p {
    color: var(--color-text-tertiary);
    font-size: 13px;
    line-height: 1.5;
}

.moment-reply-profile-close {
    width: 32px;
    height: 32px;
    flex: 0 0 32px;
    border: 1px solid var(--color-border);
    border-radius: 50%;
    background: transparent;
    color: var(--color-text-tertiary);
    cursor: pointer;
    transition: color var(--transition), border-color var(--transition);
}

.moment-reply-profile-close:hover,
.moment-reply-profile-close:focus-visible {
    color: var(--color-accent);
    border-color: var(--color-accent-soft);
    outline: none;
}

.moment-reply-fields {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: calc(var(--spacing-unit) * 2);
}

.moment-reply-field label,
.moment-reply-text-field label {
    display: block;
    margin-bottom: calc(var(--spacing-unit));
    color: var(--color-text-primary);
    font-size: 14px;
    font-weight: 500;
}

.moment-reply-field input,
.moment-reply-text-field textarea {
    width: 100%;
    padding: calc(var(--spacing-unit) * 2);
    border: 1px solid var(--color-border);
    border-radius: var(--r-md);
    background: var(--color-bg);
    color: var(--color-text-primary);
    font-family: var(--font-sans);
    font-size: 15px;
    transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.moment-reply-field input {
    min-height: 40px;
}

.moment-reply-text-field {
    margin-bottom: 0;
}

.moment-reply-text-field textarea {
    min-height: 96px;
    line-height: 1.6;
    resize: vertical;
}

.moment-reply-field input:focus,
.moment-reply-text-field textarea:focus {
    outline: none;
    border-color: var(--color-accent);
}

.moment-reply-login {
    margin: 0;
    color: var(--color-text-secondary);
    font-size: 14px;
}

.moment-reply-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: calc(var(--spacing-unit) * 2);
    flex-wrap: wrap;
}

.moment-reply-profile-toggle {
    display: inline-flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 0.5);
    max-width: min(100%, 320px);
    min-height: 0;
    margin-right: auto;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    color: var(--color-text-secondary);
    cursor: pointer;
    line-height: 1.6;
    transition: color var(--transition);
}

.moment-reply-profile-toggle:hover {
    color: var(--color-accent);
}

.moment-reply-profile-toggle:focus-visible {
    outline: 2px solid var(--color-accent-soft);
    outline-offset: 4px;
}

.moment-reply-identity-label {
    color: var(--color-text-tertiary);
    font-size: 12px;
    white-space: nowrap;
}

.moment-reply-identity-value {
    min-width: 0;
    overflow: hidden;
    color: var(--color-text-secondary);
    font-size: 14px;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.moment-reply-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--s-2);
    margin-left: auto;
}

.moment-reply-cancel,
.moment-reply-submit {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    padding: 0 calc(var(--spacing-unit) * 4);
    border: 1px solid transparent;
    border-radius: var(--r-md);
    background: transparent;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.moment-reply-cancel {
    color: var(--color-text-secondary);
    border-color: var(--color-border);
}

.moment-reply-submit {
    color: var(--color-bg);
    background: var(--color-accent);
}

.moment-reply-cancel:hover,
.moment-reply-cancel:focus-visible,
.moment-reply-submit:hover,
.moment-reply-submit:focus-visible {
    outline: none;
}

.moment-reply-cancel:hover,
.moment-reply-cancel:focus-visible {
    color: var(--color-accent);
    border-color: var(--color-accent);
    background: var(--color-surface);
}

.moment-reply-submit:hover,
.moment-reply-submit:focus-visible {
    background: var(--color-text-primary);
}

.moment-reply-profile-actions {
    display: flex;
    justify-content: flex-end;
    margin-top: calc(var(--spacing-unit) * 3);
}

.moment-reply-profile-save {
    min-width: 96px;
}

.moment-reply-form.is-enhanced .moment-reply-profile-modal {
    display: none;
}

.moment-reply-form.is-enhanced.is-profile-open .moment-reply-profile-modal {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 9999;
    display: grid;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    place-items: center;
    padding: calc(var(--spacing-unit) * 3);
}

.moment-reply-form.is-enhanced.is-profile-open .moment-reply-profile-backdrop {
    position: fixed;
    inset: 0;
    display: block;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    border: 0;
    background: rgba(0, 0, 0, 0.45);
    cursor: default;
}

[data-theme="light"] .moment-reply-form.is-enhanced.is-profile-open .moment-reply-profile-backdrop {
    background: rgba(250, 250, 249, 0.72);
}

.moment-reply-form.is-enhanced.is-profile-open .moment-reply-profile-panel {
    position: relative;
    z-index: 1;
    width: min(100%, 560px);
    max-height: min(80vh, 640px);
    overflow: auto;
    background: var(--color-surface);
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.28);
}

.empty-moments {
    text-align: center;
    padding: calc(var(--spacing-unit) * 8) 0;
    color: var(--color-text-tertiary);
}

/* 发布表单 */
.moment-publisher {
    margin-top: calc(var(--spacing-unit) * 8);
    padding: calc(var(--spacing-unit) * 4);
    background: var(--color-surface);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}

.publisher-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: calc(var(--spacing-unit) * 3);
    gap: calc(var(--spacing-unit) * 2);
    flex-wrap: wrap;
}

.publisher-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text-primary);
    margin: 0;
}

.settings-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    font-size: 14px;
    font-family: var(--font-sans);
    color: var(--color-text-secondary);
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    cursor: pointer;
    transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.settings-btn:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    background: var(--color-bg);
}

.settings-btn svg {
    width: 18px;
    height: 18px;
}

.settings-btn i {
    font-size: var(--t-base);
}

.publisher-form textarea {
    width: 100%;
    padding: calc(var(--spacing-unit) * 2);
    font-size: 15px;
    font-family: var(--font-sans);
    color: var(--color-text-primary);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    resize: vertical;
    margin-bottom: calc(var(--spacing-unit) * 2);
    line-height: 1.6;
}

.moment-editor {
    overflow: hidden;
    margin-bottom: calc(var(--spacing-unit) * 2);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-bg);
}

.moment-editor-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    padding: 8px;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-bg-secondary);
}

.moment-editor-tool {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 32px;
    padding: 0;
    border: 1px solid transparent;
    border-radius: 6px;
    background: transparent;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.moment-editor-tool:hover,
.moment-editor-tool:focus-visible {
    color: var(--color-accent);
    border-color: var(--color-border);
    background: var(--color-bg);
    outline: none;
}

.moment-editor-tool i {
    font-size: 14px;
    line-height: 1;
}

.publisher-form .moment-editor textarea {
    min-height: 150px;
    margin-bottom: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
}

.publisher-form .moment-editor textarea:focus {
    box-shadow: inset 0 0 0 1px var(--color-accent);
}

.publisher-form textarea:focus {
    outline: none;
    border-color: var(--color-accent);
}

/* 上传进度条 */
.upload-progress {
    display: none;
    align-items: center;
    gap: calc(var(--spacing-unit) * 2);
    padding: calc(var(--spacing-unit) * 2);
    background: var(--color-bg);
    border-radius: 8px;
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.progress-bar {
    flex: 1;
    height: 6px;
    background: var(--color-border);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-soft));
    animation: progress-animation 1.5s ease-in-out infinite;
}

@keyframes progress-animation {
    0% { width: 0; }
    50% { width: 70%; }
    100% { width: 100%; }
}

.progress-text {
    font-size: 13px;
    color: var(--color-text-secondary);
    white-space: nowrap;
}

/* 图床设置Modal */
.settings-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    opacity: 0;
    transition: opacity var(--transition);
    overflow-y: auto;
}

.settings-modal.show {
    opacity: 1;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 480px;
    max-height: calc(100vh - calc(var(--spacing-unit) * 4));
    overflow-y: auto;
    background: var(--color-surface);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

[data-theme="light"] .modal-content {
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: calc(var(--spacing-unit) * 3);
    border-bottom: 1px solid var(--color-border);
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text-primary);
    margin: 0;
}

.modal-close {
    font-size: 28px;
    font-weight: 300;
    line-height: 1;
    color: var(--color-text-tertiary);
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    transition: all var(--transition);
}

.modal-close:hover {
    color: var(--color-text-primary);
    background: var(--color-bg);
}

.modal-body {
    padding: calc(var(--spacing-unit) * 3);
}

.form-group {
    margin-bottom: calc(var(--spacing-unit) * 3);
}

.form-group:last-of-type {
    margin-bottom: calc(var(--spacing-unit) * 4);
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-primary);
    margin-bottom: calc(var(--spacing-unit));
}

.form-group input {
    width: 100%;
    padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 2);
    font-size: 14px;
    font-family: var(--font-sans);
    color: var(--color-text-primary);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    transition: all var(--transition);
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-accent);
}

.form-group input[readonly] {
    background: var(--color-surface);
    color: var(--color-text-tertiary);
    cursor: not-allowed;
}

.form-actions {
    display: flex;
    gap: calc(var(--spacing-unit) * 2);
    justify-content: flex-end;
    padding-top: calc(var(--spacing-unit) * 2);
    border-top: 1px solid var(--color-border);
    flex-wrap: wrap;
}

.btn-primary,
.btn-secondary {
    padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 3);
    font-size: 14px;
    font-weight: 500;
    font-family: var(--font-sans);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-primary {
    color: var(--color-bg);
    background: var(--color-accent);
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.btn-secondary {
    color: var(--color-text-secondary);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
}

.btn-secondary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ============================================
   友链页面
   ============================================ */
.friends-container {
    margin-bottom: calc(var(--spacing-unit) * 8);
}

.friends-category {
    margin-bottom: calc(var(--spacing-unit) * 8);
}

.category-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: calc(var(--spacing-unit) * 4);
    letter-spacing: -0.02em;
}

.friends-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: calc(var(--spacing-unit) * 3);
}

.friend-card {
    display: flex;
    gap: calc(var(--spacing-unit) * 2);
    padding: calc(var(--spacing-unit) * 3);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    text-decoration: none;
    transition: all var(--transition);
}

.friend-card:hover {
    transform: translateY(-2px);
    border-color: var(--color-accent);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .friend-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.friend-avatar {
    flex-shrink: 0;
}

.friend-avatar img {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    object-fit: cover;
}

.friend-info {
    flex: 1;
    min-width: 0;
}

.friend-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.friend-desc {
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.5;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.no-friends {
    text-align: center;
    padding: calc(var(--spacing-unit) * 8) 0;
    color: var(--color-text-tertiary);
}

/* 友链申请 */
.friends-apply {
    margin-top: calc(var(--spacing-unit) * 8);
    padding-top: calc(var(--spacing-unit) * 8);
    border-top: 1px solid var(--color-border);
}

.friends-extra {
    margin-top: calc(var(--spacing-unit) * 8);
    padding-top: calc(var(--spacing-unit) * 8);
    border-top: 1px solid var(--color-border);
    font-size: var(--t-base);
    line-height: 1.75;
}

.friends-extra h2 {
    font-size: 22px;
}

.friends-extra h3 {
    font-size: var(--t-md);
}

.friends-extra p {
    font-size: inherit;
    line-height: inherit;
}

.apply-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.apply-desc {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: calc(var(--spacing-unit) * 4);
}

.apply-form .form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: calc(var(--spacing-unit) * 2);
    margin-bottom: calc(var(--spacing-unit) * 3);
}

/* ============================================
   关于页面
   ============================================ */
.about-page {
    max-width: 1600px;
    margin: 0 auto;
    padding: calc(var(--spacing-unit) * 8) calc(var(--spacing-unit) * 6);
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 3fr) minmax(0, 1fr);
    gap: calc(var(--spacing-unit) * 6);
}

.about-main {
    grid-column: 2 / 3;
}

.about-header {
    text-align: center;
    padding: calc(var(--spacing-unit) * 6) 0 calc(var(--spacing-unit) * 8);
}

.about-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: calc(var(--spacing-unit) * 3);
}

.about-name {
    font-size: 32px;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: calc(var(--spacing-unit) * 2);
    letter-spacing: -0.03em;
}

.about-bio {
    font-size: 17px;
    color: var(--color-text-secondary);
    max-width: 480px;
    margin: 0 auto;
    line-height: 1.6;
}

.about-section {
    margin-bottom: calc(var(--spacing-unit) * 8);
}

.about-section-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: calc(var(--spacing-unit) * 3);
    letter-spacing: -0.02em;
}

/* ============================================
   评论区
   ============================================ */
.comments-wrapper {
    margin-top: calc(var(--spacing-unit) * 12);
    padding-top: calc(var(--spacing-unit) * 8);
    border-top: 1px solid var(--color-border);
}

.comments-section {
    width: 100%;
}

.comments-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: calc(var(--spacing-unit) * 4);
}

.comment-list {
    margin-bottom: calc(var(--spacing-unit) * 5);
}

.comment-item > .comment-list {
    flex: 0 0 100%;
    width: calc(100% - 54px);
    max-width: calc(100% - 54px);
    margin: calc(var(--spacing-unit)) 0 0 54px;
    padding-left: 0;
    border-left: 0;
    margin-bottom: 0;
    box-sizing: border-box;
}

.comment-item {
    padding: calc(var(--spacing-unit) * 2) 0;
    border-bottom: 0;
    scroll-margin-top: calc(var(--spacing-unit) * 12);
}

.comment-main {
    display: flex;
    gap: calc(var(--spacing-unit) * 2);
    padding: calc(var(--spacing-unit)) 0;
    border-radius: var(--radius);
    box-sizing: border-box;
}

.comment-item.is-highlighted > .comment-main {
    animation: qiwiCommentHighlight 1.1s ease-out;
}

@keyframes qiwiCommentHighlight {
    0%,
    55% {
        background: color-mix(in srgb, var(--color-accent) 14%, transparent);
    }

    100% {
        background: transparent;
    }
}

.comment-item > .comment-list .comment-item {
    border-bottom: 0;
    padding: calc(var(--spacing-unit) * 1.5) 0 0;
}

.comment-item > .comment-list .comment-item + .comment-item {
    margin-top: calc(var(--spacing-unit));
}

.comment-child > .comment-list {
    width: 100%;
    max-width: 100%;
    margin-left: 0;
    margin-top: calc(var(--spacing-unit));
}

.comment-child-flattened {
    padding-top: calc(var(--spacing-unit));
}

.comment-avatar img {
    width: 38px;
    height: 38px;
    border-radius: 50%;
}

.comment-content {
    flex: 1;
    min-width: 0;
}

.comment-author-line {
    display: flex;
    gap: var(--s-2);
    align-items: flex-start;
    margin-bottom: 4px;
}

.comment-author {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-primary);
}

.comment-reply-separator,
.comment-reply-target {
    font-size: 14px;
    line-height: 1.4;
}

.comment-reply-separator {
    color: var(--color-text-tertiary);
}

.comment-reply-target {
    color: var(--color-accent);
    font-weight: 500;
    text-decoration: none;
    text-underline-offset: 3px;
}

.comment-reply-target:hover,
.comment-reply-target:focus-visible {
    text-decoration: underline;
}

.comment-footnote {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 4px var(--s-2);
    font-size: 12px;
    color: var(--color-text-tertiary);
}

.comment-date,
.comment-location {
    color: inherit;
}

.comment-footnote > *:not(:last-child)::after {
    content: "·";
    margin-left: var(--s-2);
    color: var(--color-border);
}

.comment-text {
    font-size: 15px;
    line-height: 1.65;
    color: var(--color-text-primary);
    margin-bottom: 4px;
}

.comment-text p {
    margin-bottom: 4px;
}

.comment-text p:last-child {
    margin-bottom: 0;
}

.comment-reply a {
    font-size: 12px;
    color: inherit;
    text-decoration: none;
    transition: color var(--transition);
}

.comment-reply a:hover {
    color: var(--color-accent);
}

/* 评论表单 */
.comment-respond {
    margin-top: calc(var(--spacing-unit) * 5);
    padding: calc(var(--spacing-unit) * 3);
    background: var(--color-surface);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}

.comment-item > .comment-respond {
    flex: 0 0 calc(100% - 54px);
    margin: calc(var(--spacing-unit) * 2) 0 0 54px;
}

.comment-respond-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: calc(var(--spacing-unit) * 2);
    margin-bottom: calc(var(--spacing-unit) * 3);
}

.comment-respond-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--color-text-primary);
}

.comment-respond-header > a {
    flex-shrink: 0;
    font-size: 13px;
    color: var(--color-text-tertiary);
    text-decoration: none;
}

.comment-respond-header > a:hover {
    color: var(--color-accent);
}

.logged-in-as {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: calc(var(--spacing-unit) * 3);
}

.logged-in-as a {
    color: var(--color-accent);
    text-decoration: none;
    margin: 0 calc(var(--spacing-unit));
}

.logged-in-as a:hover {
    text-decoration: underline;
}

.comment-form-fields {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: calc(var(--spacing-unit) * 2);
}

.form-field {
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.form-field label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-primary);
    margin-bottom: calc(var(--spacing-unit));
}

.form-field input,
.form-field textarea {
    width: 100%;
    padding: calc(var(--spacing-unit) * 2);
    font-size: 15px;
    font-family: var(--font-sans);
    color: var(--color-text-primary);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--r-md);
    transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.form-field input:focus,
.form-field textarea:focus {
    outline: none;
    border-color: var(--color-accent);
}

.form-field textarea {
    resize: vertical;
    min-height: 112px;
    line-height: 1.6;
}

.comment-text-field {
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.comment-form-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: calc(var(--spacing-unit) * 2);
    flex-wrap: wrap;
}

.comment-profile-toggle {
    display: inline-flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 0.5);
    max-width: min(100%, 320px);
    min-height: 0;
    margin-left: auto;
    padding: 0;
    color: var(--color-text-secondary);
    background: transparent;
    border: 0;
    border-radius: 0;
    cursor: pointer;
    line-height: 1.6;
    transition: color var(--transition);
}

.comment-profile-toggle:hover {
    color: var(--color-accent);
}

.comment-profile-toggle:focus-visible {
    outline: 2px solid var(--color-accent-soft);
    outline-offset: 4px;
}

.comment-identity-label {
    font-size: 12px;
    color: var(--color-text-tertiary);
    white-space: nowrap;
}

.comment-identity-value {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 14px;
}

.comment-profile-modal {
    margin-bottom: calc(var(--spacing-unit) * 3);
}

.comment-profile-backdrop {
    display: none;
}

.comment-profile-panel {
    padding: calc(var(--spacing-unit) * 3);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}

.comment-profile-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: calc(var(--spacing-unit) * 3);
    margin-bottom: calc(var(--spacing-unit) * 3);
}

.comment-profile-header h4 {
    font-size: 16px;
    color: var(--color-text-primary);
    margin-bottom: 2px;
}

.comment-profile-header p {
    font-size: 13px;
    line-height: 1.5;
    color: var(--color-text-tertiary);
}

.comment-profile-close {
    width: 32px;
    height: 32px;
    flex: 0 0 32px;
    color: var(--color-text-tertiary);
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition);
}

.comment-profile-close:hover {
    color: var(--color-accent);
    border-color: var(--color-accent-soft);
}

.comment-profile-actions {
    display: flex;
    justify-content: flex-end;
}

.comment-form.is-enhanced .comment-profile-modal {
    display: none;
}

.comment-form.is-enhanced.is-profile-open .comment-profile-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    z-index: 9999;
    display: grid;
    place-items: center;
    padding: calc(var(--spacing-unit) * 3);
}

.comment-form.is-enhanced.is-profile-open .comment-profile-backdrop {
    position: fixed;
    inset: 0;
    display: block;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    background: rgba(0, 0, 0, 0.45);
    border: 0;
    cursor: default;
}

[data-theme="light"] .comment-form.is-enhanced.is-profile-open .comment-profile-backdrop {
    background: rgba(250, 250, 249, 0.72);
}

.comment-form.is-enhanced.is-profile-open .comment-profile-panel {
    position: relative;
    z-index: 1;
    width: min(100%, 560px);
    max-height: min(80vh, 640px);
    overflow: auto;
    background: var(--color-surface);
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.28);
}

.captcha-script {
    border-radius: 8px;
    overflow: hidden;
}

.submit-button {
    margin-top: 12px;
    padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 4);
    font-size: 15px;
    font-weight: 500;
    color: var(--color-bg);
    background: var(--color-accent);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition);
}

.submit-button:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.comments-closed {
    text-align: center;
    padding: calc(var(--spacing-unit) * 6);
    color: var(--color-text-tertiary);
}

/* ============================================
   归档页面
   ============================================ */
.archive-header {
    margin-bottom: calc(var(--spacing-unit) * 6);
    padding-bottom: calc(var(--spacing-unit) * 4);
    border-bottom: 1px solid var(--color-border);
}

.archive-title {
    font-size: 28px;
    font-weight: 600;
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
}

.archive-description {
    color: var(--color-text-secondary);
    margin-top: calc(var(--spacing-unit) * 2);
    line-height: 1.6;
}

.archive-stats {
    color: var(--color-text-tertiary);
    font-size: 14px;
    margin-top: calc(var(--spacing-unit) * 2);
}

/* 写作统计区域 */
.writing-stats {
    margin-top: calc(var(--spacing-unit) * 4);
    padding: calc(var(--spacing-unit) * 3);
    background: var(--color-surface);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}

.stats-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing-unit) * 2);
}

.stats-item {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

.stats-highlight {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-accent);
    border-bottom: 3px solid var(--color-accent);
    padding-bottom: 2px;
    margin: 0 4px;
}

/* 书籍滚筒动画 */
.book-roller-container {
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.book-number-roller,
.book-name-roller {
    display: inline-block;
    position: relative;
    overflow: hidden;
    vertical-align: baseline;
    height: 32px;
    line-height: 32px;
}

.roller-wrapper {
    display: block;
    transition: transform 0.6s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.roller-item {
    display: block;
    height: 32px;
    line-height: 32px;
}

.book-number-roller .roller-item {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-accent);
    border-bottom: 3px solid var(--color-accent);
    padding-bottom: 2px;
    margin: 0 4px;
}

.book-name-roller .roller-item {
    font-size: 16px;
    color: var(--color-text-secondary);
}

/* 2本书的动画 */
.roller-wrapper-2 {
    animation: roller-2-books 8s infinite;
}

@keyframes roller-2-books {
    0%, 45% {
        transform: translateY(0);
    }
    50%, 95% {
        transform: translateY(-32px);
    }
    100% {
        transform: translateY(0);
    }
}

/* 3本书的动画 */
.roller-wrapper-3 {
    animation: roller-3-books 12s infinite;
}

@keyframes roller-3-books {
    0%, 30% {
        transform: translateY(0);
    }
    33%, 63% {
        transform: translateY(-32px);
    }
    66%, 96% {
        transform: translateY(-64px);
    }
    100% {
        transform: translateY(0);
    }
}

/* 4本书的动画 */
.roller-wrapper-4 {
    animation: roller-4-books 16s infinite;
}

@keyframes roller-4-books {
    0%, 23% {
        transform: translateY(0);
    }
    25%, 48% {
        transform: translateY(-32px);
    }
    50%, 73% {
        transform: translateY(-64px);
    }
    75%, 98% {
        transform: translateY(-96px);
    }
    100% {
        transform: translateY(0);
    }
}

/* 5本书的动画 */
.roller-wrapper-5 {
    animation: roller-5-books 20s infinite;
}

@keyframes roller-5-books {
    0%, 18% {
        transform: translateY(0);
    }
    20%, 38% {
        transform: translateY(-32px);
    }
    40%, 58% {
        transform: translateY(-64px);
    }
    60%, 78% {
        transform: translateY(-96px);
    }
    80%, 98% {
        transform: translateY(-128px);
    }
    100% {
        transform: translateY(0);
    }
}

.archives-timeline {
    position: relative;
}

.archive-year-section {
    margin-bottom: calc(var(--spacing-unit) * 6);
}

.year-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: calc(var(--spacing-unit) * 3);
    padding-left: calc(var(--spacing-unit) * 2);
    border-left: 3px solid var(--color-accent);
}

.archive-post-list {
    list-style: none;
}

.archive-post-item {
    display: flex;
    align-items: baseline;
    padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 2);
    margin: 0 calc(var(--spacing-unit) * -2);
    border-bottom: 1px dashed var(--color-border);
    border-radius: 6px;
    transition: all var(--transition);
}

.archive-post-item:hover {
    background: var(--color-surface);
    transform: translateX(calc(var(--spacing-unit)));
}

.archive-post-item:last-child {
    border-bottom: none;
}

.archive-post-item .post-date {
    font-size: 14px;
    color: var(--color-text-tertiary);
    font-family: var(--font-mono);
    min-width: 3rem;
    margin-right: calc(var(--spacing-unit) * 2);
}

.archive-post-item .post-title-link {
    flex: 1;
    color: var(--color-text-primary);
    text-decoration: none;
    transition: color var(--transition);
}

.archive-post-item .post-title-link:hover,
.archive-post-item:hover .post-title-link {
    color: var(--color-accent);
}

.archive-post-item .post-wordcount {
    font-size: 13px;
    color: var(--color-text-tertiary);
    margin-left: auto;
    white-space: nowrap;
    padding-left: calc(var(--spacing-unit) * 2);
}

.taxonomy-cloud {
    display: flex;
    flex-wrap: wrap;
    column-gap: calc(var(--spacing-unit) * 3);
    row-gap: calc(var(--spacing-unit) * 1.5);
    line-height: 1.8;
}

.taxonomy-list-item {
    gap: calc(var(--spacing-unit) * 2);
}

.taxonomy-description {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 13px;
    color: var(--color-text-tertiary);
}

.thread-taxonomy-timeline {
    margin-top: calc(var(--spacing-unit) * 6);
}

.thread-taxonomy-item {
    border-left: 3px solid var(--color-accent);
    background: color-mix(in srgb, var(--color-surface) 55%, transparent);
}

.thread-taxonomy-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--s-2);
    margin-top: var(--s-1);
    color: var(--color-text-tertiary);
    font-family: var(--font-mono);
    font-size: var(--t-xs);
}

.thread-taxonomy-meta span:not(:last-child)::after {
    content: "/";
    margin-left: var(--s-2);
    color: var(--color-border);
}

.thread-taxonomy-stats {
    margin-top: calc(var(--spacing-unit) * 2);
}

/* ============================================
   Thread 文集页面
   ============================================ */
.thread-page {
    padding: calc(var(--spacing-unit) * 12) calc(var(--spacing-unit) * 4) calc(var(--spacing-unit) * 14);
}

.thread-shell {
    width: min(100%, 1080px);
    margin: 0 auto;
}

.thread-back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--s-2);
    margin-bottom: calc(var(--spacing-unit) * 5);
    color: var(--color-text-secondary);
    font-size: var(--t-sm);
    transition: color var(--transition);
}

.thread-back-link::before {
    content: "";
    width: 0.55em;
    height: 0.55em;
    border-left: 1.5px solid currentColor;
    border-bottom: 1.5px solid currentColor;
    transform: rotate(45deg);
}

.thread-back-link:hover {
    color: var(--color-accent);
}

.thread-hero {
    padding-bottom: calc(var(--spacing-unit) * 7);
    border-bottom: 1px solid var(--color-border);
}

.thread-route-head p {
    font-family: var(--font-mono);
    font-size: var(--t-sm);
    letter-spacing: 0;
    color: var(--color-text-tertiary);
}

.thread-hero h1 {
    max-width: 960px;
    margin-top: 0;
    font-family: var(--font-sans);
    font-size: 56px;
    line-height: 1.12;
    letter-spacing: 0;
    color: var(--color-text-primary);
}

.thread-subtitle {
    max-width: 780px;
    margin-top: calc(var(--spacing-unit) * 3);
    padding-left: calc(var(--spacing-unit) * 3);
    border-left: 3px solid var(--color-accent);
    font-family: var(--font-sans);
    font-size: var(--t-lg);
    line-height: 1.65;
    color: var(--color-text-secondary);
}

.thread-summary {
    max-width: 760px;
    margin-top: calc(var(--spacing-unit) * 4);
    color: var(--color-text-secondary);
    font-size: var(--t-md);
    line-height: 1.8;
}

.thread-summary p:not(:last-child),
.thread-text-block p:not(:last-child),
.thread-post-note p:not(:last-child) {
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.thread-summary a,
.thread-text-block a,
.thread-post-note a {
    color: var(--color-accent);
    border-bottom: 1px solid color-mix(in srgb, var(--color-accent) 45%, transparent);
}

.thread-meta-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, max-content));
    gap: calc(var(--spacing-unit) * 5);
    margin-top: calc(var(--spacing-unit) * 5);
}

.thread-meta-grid dt {
    margin-bottom: 4px;
    color: var(--color-text-tertiary);
    font-size: var(--t-xs);
}

.thread-meta-grid dd {
    display: flex;
    align-items: center;
    gap: 7px;
    color: var(--color-text-primary);
    font-family: var(--font-mono);
    font-size: var(--t-sm);
}

.thread-status-dot {
    width: 8px;
    height: 8px;
    border-radius: var(--r-pill);
    background: var(--color-accent);
}

.thread-route {
    margin-top: calc(var(--spacing-unit) * 7);
}

.thread-route-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: calc(var(--spacing-unit) * 3);
}

.thread-blocks {
    position: relative;
    --thread-marker-width: 88px;
    --thread-axis-padding: 24px;
    --thread-axis-left: calc(var(--thread-marker-width) + var(--thread-axis-padding));
    --thread-content-gap: 24px;
    --thread-content-start: calc(var(--thread-axis-left) + var(--thread-content-gap));
}

.thread-blocks::before {
    content: "";
    position: absolute;
    left: var(--thread-axis-left);
    top: 8px;
    bottom: 8px;
    width: 1px;
    background: var(--color-border);
}

.thread-post-block {
    position: relative;
    display: grid;
    grid-template-columns: var(--thread-marker-width) minmax(0, 1fr);
    column-gap: calc(var(--thread-axis-padding) + var(--thread-content-gap));
    padding: calc(var(--spacing-unit) * 4) 0;
    cursor: pointer;
}

.thread-post-block::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    height: 1px;
    background: color-mix(in srgb, var(--color-border) 72%, transparent);
}

.thread-post-cover {
    position: absolute;
    inset: 0;
    z-index: 1;
    border-radius: var(--r-sm);
}

.thread-post-marker {
    position: relative;
    z-index: 2;
    display: grid;
    align-content: start;
    gap: 3px;
    justify-items: end;
    padding-top: 4px;
    text-align: right;
    pointer-events: none;
}

.thread-post-marker span {
    display: block;
    font-family: var(--font-sans);
    font-size: var(--t-lg);
    font-weight: 700;
    line-height: 1.12;
    color: var(--color-text-primary);
    background: var(--color-bg);
}

.thread-post-marker time {
    display: block;
    margin-top: 0;
    color: var(--color-text-tertiary);
    font-family: var(--font-sans);
    font-size: 13px;
    font-weight: 500;
    line-height: 1.3;
    white-space: normal;
}

.thread-post-body {
    position: relative;
    z-index: 2;
    min-width: 0;
    pointer-events: none;
}

.thread-post-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--s-2);
    margin-bottom: var(--s-2);
    color: var(--color-text-tertiary);
    font-size: var(--t-xs);
}

.thread-post-body h2 {
    font-family: var(--font-sans);
    font-size: 32px;
    line-height: 1.18;
    letter-spacing: 0;
    color: var(--color-text-primary);
    transition: color var(--transition);
}

.thread-post-block:hover .thread-post-body h2 {
    color: var(--color-accent);
}

.thread-post-body > p {
    margin-top: calc(var(--spacing-unit) * 2);
    color: var(--color-text-secondary);
    font-size: var(--t-md);
    line-height: 1.8;
}

.thread-post-note,
.thread-text-block {
    margin-top: calc(var(--spacing-unit) * 4);
    padding: calc(var(--spacing-unit) * 3) calc(var(--spacing-unit) * 4);
    color: var(--color-text-secondary);
    background: var(--color-surface);
    border-left: 3px solid var(--color-accent);
    line-height: 1.8;
}

.thread-text-block {
    position: relative;
    margin: calc(var(--spacing-unit) * 5) 0;
    padding: calc(var(--spacing-unit) * 4) calc(var(--spacing-unit) * 5);
}

.thread-text-block h2 {
    margin-bottom: calc(var(--spacing-unit) * 2);
    font-family: var(--font-sans);
    font-size: var(--t-xl);
    color: var(--color-text-primary);
}

.thread-text-block ul,
.thread-text-block ol,
.thread-summary ul,
.thread-summary ol,
.thread-post-note ul,
.thread-post-note ol {
    padding-left: 1.35em;
    margin: calc(var(--spacing-unit) * 2) 0;
}

/* ============================================
   404错误页面
   ============================================ */
.error-layout {
    grid-template-columns: minmax(0, 1fr);
    min-height: min(70vh, 720px);
    align-items: center;
}

.error-main {
    width: min(100%, 720px);
    margin: 0 auto;
}

.error-page {
    text-align: center;
    padding: calc(var(--spacing-unit) * 12) 0;
}

.error-code {
    font-size: 96px;
    font-weight: 700;
    color: var(--color-text-tertiary);
    line-height: 1;
    margin-bottom: calc(var(--spacing-unit) * 3);
}

.error-title {
    font-size: 28px;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.error-message {
    font-size: 16px;
    color: var(--color-text-secondary);
    margin-bottom: calc(var(--spacing-unit) * 6);
}

.error-actions {
    display: flex;
    justify-content: center;
    gap: calc(var(--spacing-unit) * 2);
    flex-wrap: wrap;
}

/* ============================================
   页脚
   ============================================ */
.site-footer {
    border-top: 1px solid var(--color-border);
    margin-top: calc(var(--spacing-unit) * 12);
    padding: calc(var(--spacing-unit) * 8) 0;
    background: var(--color-bg);
}

.footer-content {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 calc(var(--spacing-unit) * 6);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: calc(var(--spacing-unit) * 4);
}

.footer-info {
    flex: 1;
}

.footer-info p {
    font-size: 14px;
    color: var(--color-text-tertiary);
    line-height: 1.8;
    margin: 0;
}

.footer-info a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition);
}

.footer-info a:hover {
    color: var(--color-accent);
}

.footer-meta {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 4);
}

.footer-links {
    display: flex;
    gap: calc(var(--spacing-unit) * 3);
    flex-wrap: wrap;
}

.footer-links a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition);
}

.footer-links a:hover {
    color: var(--color-accent);
}

.footer-links svg {
    width: 16px;
    height: 16px;
}

.theme-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-unit);
    font-size: 13px;
    color: var(--color-text-tertiary);
    flex-wrap: wrap;
}

.theme-info a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition);
}

.theme-version {
    padding: 0;
    font: inherit;
    color: inherit;
    background: none;
    border: none;
    cursor: pointer;
    transition: color var(--transition);
}

.theme-info a:hover {
    color: var(--color-accent);
}

.theme-version:hover {
    color: var(--color-accent);
}

/* ============================================
   分页导航
   ============================================ */
.pagination-wrapper {
    margin-top: calc(var(--spacing-unit) * 6);
    display: flex;
    justify-content: center;
}

.page-navigator {
    display: flex;
    gap: calc(var(--spacing-unit) * 2);
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}

.page-navigator a,
.page-navigator span {
    padding: calc(var(--spacing-unit)) calc(var(--spacing-unit) * 2);
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition);
    font-size: 15px;
    white-space: nowrap;
}

.page-navigator a:hover {
    color: var(--color-accent);
}

.page-navigator .current {
    color: var(--color-accent);
    font-weight: 600;
}

/* ============================================
   空状态
   ============================================ */
.empty-posts {
    text-align: center;
    padding: calc(var(--spacing-unit) * 12) 0;
}

.empty-icon {
    margin-bottom: calc(var(--spacing-unit) * 4);
    color: var(--color-text-tertiary);
}

.empty-posts h2 {
    font-size: 24px;
    color: var(--color-text-primary);
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.empty-posts p {
    font-size: 16px;
    color: var(--color-text-secondary);
}

/* ============================================
   响应式
   ============================================ */
@media (max-width: 1200px) {
    .home-hero-title {
        font-size: 64px;
    }

    .home-hero-inner {
        padding: var(--s-8) var(--s-4);
    }

    .main-layout {
        grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr);
        padding: calc(var(--spacing-unit) * 6) calc(var(--spacing-unit) * 4);
        gap: calc(var(--spacing-unit) * 4);
    }

    .main-layout.has-jike .home-jike {
        grid-column: 1 / -1;
    }

    .main-layout.has-jike .main-content {
        grid-column: 1 / 2;
    }

    .main-layout.has-jike .sidebar {
        grid-column: 2 / 3;
    }

    .article-page,
    .article-page.has-toc,
    .about-page,
    .timemachine-page,
    .friends-page {
        grid-template-columns: 1fr;
        padding: calc(var(--spacing-unit) * 6) calc(var(--spacing-unit) * 4);
    }

    .layout-spacer-left,
    .layout-spacer-right,
    .article-toc {
        display: none;
    }

    .main-content {
        grid-column: 1 / 2;
    }

    .article-main,
    .about-main,
    .timemachine-main,
    .friends-main {
        grid-column: 1 / 2;
    }

    .main-layout .sidebar {
        grid-column: 2 / 3;
    }

    /* 确保文章内容不超出屏幕 */
    .article-body {
        max-width: calc(100vw - calc(var(--spacing-unit) * 8));
        padding-left: calc(var(--spacing-unit) * 2);
        padding-right: calc(var(--spacing-unit) * 2);
    }
}

@media (max-width: 768px) {
    .home-hero {
        min-height: 72vh;
        min-height: 72svh;
    }

    .home-hero-inner {
        padding: var(--s-8) var(--s-3) var(--s-7);
    }

    .home-hero-eyebrow {
        margin-bottom: var(--s-5);
        font-size: var(--t-xs);
    }

    .home-hero-title {
        min-height: 2.6em;
        font-size: 44px;
        line-height: 1.12;
    }

    .home-hero-quote {
        box-sizing: border-box;
        padding: 0 var(--s-3);
        font-size: var(--t-base);
    }

    .home-hero-actions {
        gap: var(--s-2);
    }

    .home-hero-button {
        min-height: 42px;
        padding: 0 var(--s-4);
        font-size: var(--t-sm);
    }

    .home-hero-scroll {
        margin-top: var(--s-7);
    }

    .home-section-header h2 {
        font-size: var(--t-xl);
    }

    .main-layout,
    .article-page,
    .about-page,
    .timemachine-page,
    .friends-page {
        grid-template-columns: 1fr;
        padding: calc(var(--spacing-unit) * 4) calc(var(--spacing-unit) * 3);
    }

    html.nav-open,
    body.nav-open {
        overflow: hidden;
        overscroll-behavior: none;
    }

    body.nav-open::before {
        content: "";
        position: fixed;
        inset: 0;
        z-index: 90;
        background: rgba(0, 0, 0, 0.28);
        backdrop-filter: blur(2px);
        -webkit-backdrop-filter: blur(2px);
    }

    .navbar {
        z-index: 200;
    }

    html.nav-open .navbar {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
    }

    .navbar-inner {
        position: relative;
        z-index: 210;
        padding: var(--s-2) var(--s-3);
    }

    .nav-toggle {
        display: inline-flex;
        margin-left: auto;
        position: relative;
        z-index: 220;
        background: var(--color-bg);
    }

    .nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
        transform: translateY(6px) rotate(45deg);
    }

    .nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
        transform: translateY(-6px) rotate(-45deg);
    }

    .nav-links {
        position: absolute;
        top: calc(100% + var(--s-2));
        left: var(--s-3);
        right: var(--s-3);
        z-index: 230;
        display: flex;
        flex-direction: column;
        align-items: stretch;
        gap: var(--s-1);
        max-height: calc(100svh - 72px - var(--s-5));
        padding: var(--s-3);
        overflow-y: auto;
        overscroll-behavior: contain;
        background: rgba(24, 24, 27, 0.98);
        border: 1px solid var(--color-border);
        border-radius: var(--r-lg);
        box-shadow: 0 24px 60px rgba(0, 0, 0, 0.28);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transform: translateY(-8px);
        transition: opacity var(--transition), visibility var(--transition), transform var(--transition);
    }

    [data-theme="light"] .nav-links {
        background: rgba(250, 250, 249, 0.98);
        box-shadow: 0 24px 60px rgba(63, 63, 70, 0.16);
    }

    .nav-links.is-open {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        transform: translateY(0);
    }

    .nav-links li {
        display: block;
        width: 100%;
    }

    .nav-item-row {
        display: grid;
        grid-template-columns: minmax(0, 1fr) 42px;
        align-items: center;
        gap: var(--s-1);
        width: 100%;
    }

    .nav-item-row > a {
        min-width: 0;
    }

    .nav-links a,
    .theme-toggle {
        display: flex;
        align-items: center;
        justify-content: flex-start;
        width: 100%;
        min-height: 46px;
        padding: 0 var(--s-3);
        border: 1px solid transparent;
        border-radius: var(--r-md);
        background: transparent;
        color: var(--color-text-secondary);
        line-height: 1.2;
    }

    .nav-links > li > a.current,
    .nav-item-row > a.current,
    .nav-links a:hover,
    .nav-links a:focus-visible {
        color: var(--color-accent);
        border-color: var(--color-border);
        background: var(--color-surface);
    }

    .nav-item-row > a .nav-caret {
        display: none;
    }

    .nav-submenu-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 42px;
        height: 42px;
        padding: 0;
        border: 1px solid var(--color-border);
        border-radius: var(--r-md);
        background: var(--color-surface);
        color: var(--color-text-secondary);
        transition: color var(--transition), border-color var(--transition), background var(--transition);
    }

    .nav-submenu-toggle:hover,
    .nav-submenu-toggle:focus-visible,
    .nav-submenu-toggle[aria-expanded="true"] {
        color: var(--color-accent);
        border-color: var(--color-accent);
    }

    .nav-submenu-toggle .nav-caret {
        opacity: 0.8;
    }

    .nav-submenu-toggle[aria-expanded="true"] .nav-caret {
        transform: rotate(225deg) translate(-0.06em, -0.06em);
    }

    .nav-submenu {
        position: static;
        display: grid;
        gap: var(--s-1);
        min-width: 0;
        padding: var(--s-1) 0 var(--s-2) var(--s-3);
        margin: var(--s-1) 0 var(--s-2) var(--s-2);
        background: transparent;
        border: 0;
        border-left: 1px solid var(--color-border);
        border-radius: 0;
        box-shadow: none;
        opacity: 1;
        visibility: visible;
        transform: none;
    }

    .nav-js-enabled .nav-submenu {
        max-height: 0;
        margin-top: 0;
        margin-bottom: 0;
        padding-top: 0;
        padding-bottom: 0;
        overflow: hidden;
        opacity: 0;
        pointer-events: none;
        transition: max-height var(--transition), opacity var(--transition), margin var(--transition), padding var(--transition);
    }

    .nav-js-enabled .nav-item-has-children.is-submenu-open .nav-submenu {
        max-height: 360px;
        margin-top: var(--s-1);
        margin-bottom: var(--s-2);
        padding-top: var(--s-1);
        padding-bottom: var(--s-2);
        opacity: 1;
        pointer-events: auto;
    }

    .nav-submenu::before {
        display: none;
    }

    .nav-item-has-children:hover .nav-submenu,
    .nav-item-has-children:focus-within .nav-submenu {
        transform: none;
    }

    .nav-submenu a {
        min-height: 38px;
        padding-left: var(--s-3);
        background: transparent;
        font-size: var(--t-sm);
    }

    .nav-submenu a.current,
    .nav-submenu a:hover,
    .nav-submenu a:focus-visible {
        background: var(--color-bg-deep);
    }

    .theme-toggle {
        justify-content: center;
        margin-top: var(--s-1);
        background: var(--color-surface);
        border-color: var(--color-border);
    }

    .sidebar {
        position: static;
        margin-top: 0;
        padding-left: 0;
        width: 100%;
    }

    .sidebar-sticky {
        position: static;
    }

    .sidebar-header {
        margin-bottom: calc(var(--spacing-unit) * 6);
        padding-bottom: calc(var(--spacing-unit) * 4);
    }

    .main-layout .main-content {
        grid-column: 1 / -1;
    }

    .main-layout .sidebar {
        grid-column: 1 / -1;
        display: none;
    }

    .home-main-layout.has-home-section-header .sidebar {
        margin-top: 0;
    }

    .main-layout.has-jike .home-jike,
    .main-layout.has-jike .main-content,
    .main-layout.has-jike .sidebar {
        grid-column: 1 / -1;
    }

    .main-layout.has-jike .main-content {
        grid-row: 2;
    }

    .main-layout.has-jike .sidebar {
        grid-row: 3;
    }

    .home-jike-shell {
        --jike-row-height: 44px;
    }

    .home-jike-item {
        gap: calc(var(--spacing-unit) * 1.5);
    }

    .main-layout.has-jike .home-jike-item {
        padding: 0 calc(var(--spacing-unit) * 2);
    }

    .home-jike-label {
        font-size: 12px;
    }

    .home-jike-text {
        font-size: 13px;
    }

    .home-jike-date {
        display: none;
    }

    .thread-page {
        padding: calc(var(--spacing-unit) * 6) calc(var(--spacing-unit) * 3) calc(var(--spacing-unit) * 9);
    }

    .thread-back-link {
        margin-bottom: calc(var(--spacing-unit) * 4);
    }

    .thread-hero h1 {
        font-size: 40px;
    }

    .thread-subtitle {
        font-size: var(--t-md);
    }

    .thread-meta-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: calc(var(--spacing-unit) * 3);
    }

    .thread-blocks::before {
        left: 18px;
    }

    .thread-post-block {
        grid-template-columns: 1fr;
        gap: calc(var(--spacing-unit) * 2);
        padding-left: calc(var(--spacing-unit) * 6);
    }

    .thread-post-marker {
        display: flex;
        align-items: center;
        justify-content: flex-start;
        gap: var(--s-3);
        padding-top: 0;
        text-align: left;
    }

    .thread-post-marker span {
        font-size: var(--t-base);
    }

    .thread-post-marker time {
        margin-top: 0;
        font-size: 12px;
    }

    .thread-post-body h2 {
        font-size: 28px;
    }

    .thread-text-block {
        margin-left: 0;
        padding: calc(var(--spacing-unit) * 3);
    }

    .article-item-inner {
        flex-direction: column;
        gap: calc(var(--spacing-unit) * 3);
        min-height: 0;
    }

    .article-content {
        flex: 1;
        padding-right: 0;
    }

    .article-thumbnail-wrapper {
        flex: none;
        width: 100%;
        height: clamp(180px, 48vw, 240px);
    }

    .article-title {
        font-size: 20px;
    }

    .article-header-title {
        font-size: 32px;
    }

    .article-item:hover {
        transform: none;
    }

    .article-header-meta,
    .moment-header,
    .comment-author-line {
        align-items: flex-start;
    }

    .article-hero {
        width: 100%;
        margin: 0 0 calc(var(--spacing-unit) * 4);
    }

    /* 移动端文章内容适配 */
    .article-body {
        max-width: 100%;
        padding-left: 0;
        padding-right: 0;
        margin-bottom: calc(var(--spacing-unit) * 8);
    }

    .article-body h2 {
        font-size: 24px;
    }

    .article-body h3 {
        font-size: 20px;
    }

    .article-body p {
        font-size: 16px;
    }

    .article-body ul,
    .article-body ol {
        padding-left: calc(var(--spacing-unit) * 3);
    }

    .article-body table {
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        white-space: nowrap;
    }

    .article-body img {
        cursor: auto;
    }

    .code-block-header {
        flex-wrap: wrap;
        gap: calc(var(--spacing-unit) * 2);
    }

    .about-name {
        font-size: 28px;
    }

    .post-tags {
        align-items: baseline;
        gap: var(--s-2) var(--s-3);
    }

    .post-navigation {
        grid-template-columns: 1fr;
        gap: var(--s-5);
    }

    .comment-form-fields {
        grid-template-columns: 1fr;
    }

    .comment-item {
        padding: calc(var(--spacing-unit) * 2) 0;
    }

    .comment-main {
        flex-direction: row;
        gap: calc(var(--spacing-unit) * 2);
    }

    .comment-avatar img {
        width: 34px;
        height: 34px;
    }

    .comment-item > .comment-list {
        width: 100%;
        max-width: 100%;
        margin-left: 0;
        padding-left: 0;
        border-left: 0;
        margin-bottom: 0;
    }

    .comment-item > .comment-list .comment-item {
        padding-left: 0;
    }

    .comment-item > .comment-respond {
        flex-basis: 100%;
        width: 100%;
        margin-left: 0;
    }

    .comment-form-footer {
        align-items: stretch;
    }

    .comment-profile-toggle {
        max-width: none;
        width: auto;
        justify-content: flex-end;
    }

    .comment-profile-actions {
        display: block;
    }

    .comment-profile-save {
        width: 100%;
    }

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

    .friends-extra,
    .friends-extra p {
        font-size: 15px;
    }

    .apply-form .form-row {
        grid-template-columns: 1fr;
    }

    .moment-item {
        display: flex;
        flex-direction: row;
        gap: calc(var(--spacing-unit) * 2);
    }

    .moment-avatar {
        width: 40px;
        height: 40px;
    }

    .moment-avatar img {
        width: 40px;
        height: 40px;
    }

    .moment-header {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 4px calc(var(--spacing-unit) * 1.5);
    }

    .moment-footer {
        align-items: flex-start;
        flex-direction: column;
    }

    .moment-actions {
        width: 100%;
        justify-content: flex-end;
    }

    .moment-comments-list .moment-comments-list {
        padding-left: var(--s-3);
    }

    .moment-reply-fields {
        grid-template-columns: 1fr;
    }

    .moment-reply-footer {
        align-items: stretch;
    }

    .moment-reply-profile-toggle {
        width: auto;
        max-width: none;
        justify-content: flex-end;
    }

    .moment-reply-profile-actions {
        display: block;
    }

    .moment-reply-profile-save {
        width: 100%;
    }

    .moment-reply-actions {
        width: 100%;
        margin-left: 0;
        justify-content: flex-end;
    }

    .publisher-header,
    .footer-meta,
    .form-actions,
    .error-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .settings-btn,
    .btn-primary,
    .btn-secondary,
    .submit-button {
        width: 100%;
        justify-content: center;
    }

    .modal-content {
        width: 100%;
        max-width: none;
    }

    .footer-content {
        flex-direction: column;
        align-items: stretch;
        text-align: left;
    }

    /* 归档页面移动端适配 */
    .archive-post-item {
        flex-direction: column;
        align-items: flex-start;
        gap: calc(var(--spacing-unit));
    }

    .archive-post-item .post-date {
        min-width: auto;
        margin-right: 0;
    }

    .archive-post-item .post-wordcount {
        margin-left: 0;
        padding-left: 0;
    }

    .taxonomy-description {
        width: 100%;
        white-space: normal;
    }

    /* 写作统计区域移动端适配 */
    .writing-stats {
        padding: calc(var(--spacing-unit) * 2);
    }

    .stats-item {
        font-size: 15px;
    }

    .stats-highlight {
        font-size: 20px;
    }

    .theme-info {
        justify-content: space-between;
    }
}