/*
 * =================================================================
 *     Generated stylesheet. Edit files in src/styles/ instead.
 * =================================================================
 */
/* 00-header.css */
/*
 * =================================================================
 *     Frank's Blog - Master Stylesheet (v21.0 Pixel Perfect)
 * =================================================================
 * 
 *  TABLE OF CONTENTS:
 *  1. Variables & Theme Setup
 *  2. Base & Reset
 *  3. Layout
 *  4. Navigation & Controls (Fixed Alignment)
 *  5. Typography & Article
 *  6. Sidebar & TOC
 *  7. Modules
 */

/* 01-tokens.css */
/* =========================================
 *  1. VARIABLES & THEME SETUP
 * ========================================= */
@import url('https://fonts.googleapis.com/css2?family=Literata:ital,opsz,wght@0,7..72,400;0,7..72,700;1,7..72,400&family=Noto+Sans+SC:wght@400;500;700&family=Noto+Serif+SC:wght@400;600;700&family=Public+Sans:wght@400;500;700;800&display=swap');

:root {
    --c-code-text: #D63384;
    --c-bg-body: #F8F9FA; /* Morning paper subtle warm gray */
    --c-bg-soft: #F1F3F5; /* Gentle off-surface */
    --c-bg-card: #FFFFFF; /* Lifted card surface */
    --c-text: #2B2D30; /* Warm dark ink, perfectly anti-glare */
    --c-text-muted: #6C757D; /* Subdued secondary text */
    --c-border: rgba(0, 0, 0, 0.1);
    --c-border-highlight: rgba(255, 255, 255, 0.5);
    --c-primary: #0066CC; /* Apple's blue */
    --c-nav-bg: rgba(255, 255, 255, 0.72);
    --c-nav-hover: rgba(0, 0, 0, 0.05);
    --img-brightness: 1;
    --c-sidebar-bg: rgba(245, 245, 247, 0.6);
    --c-sidebar-hover: rgba(0, 0, 0, 0.04);
    --c-sidebar-active-bg: rgba(0, 102, 204, 0.08);
    --c-toc-panel-bg: rgba(255, 255, 255, 0.82);
    --c-toc-panel-border: rgba(43, 45, 48, 0.08);
    --c-toc-panel-shadow: 0 18px 44px rgba(15, 23, 42, 0.08);
    --c-toc-title: #5B6470;
    --c-toc-text: #66707B;
    --c-toc-text-strong: #1F2933;
    --c-toc-hover-bg: rgba(31, 41, 51, 0.045);
    --c-toc-active-bg: rgba(40, 91, 124, 0.08);
    --c-toc-active-border: rgba(40, 91, 124, 0.56);
    --c-toc-nested-line: rgba(43, 45, 48, 0.08);
    --c-shadow-glass: 0 1px 2px rgba(0,0,0,0.015), 0 2px 4px rgba(0,0,0,0.015), 0 4px 8px rgba(0,0,0,0.015), 0 8px 16px rgba(0,0,0,0.015), 0 16px 32px rgba(0,0,0,0.015);
    --c-glass-border-top: rgba(255, 255, 255, 0.8);
    --font-serif: 'Literata', 'Noto Serif SC', Georgia, serif;
    --font-sans: 'Public Sans', 'Noto Sans SC', 'Aptos', 'Segoe UI', sans-serif;
    --navbar-height: 60px;
    --reader-measure-latin: 70ch;
    --reader-measure-cjk: 38em;
    --reader-measure-cjk-mobile: 19em;
    --reader-line-height-latin: 1.68;
    --reader-line-height-cjk: 1.78;
    --reader-paragraph-gap-latin: 1.25em;
    --reader-paragraph-gap-cjk: 1.18em;
    --tracking-latin: 0.006em;
    --tracking-zh: 0;
    --word-space-latin: 0.01em;
    --word-space-zh: 0;
    --reader-scale: 1;
    --font-scale-origin-x: 0px;
    --font-scale-origin-y: 0px;
    --font-scale-from: 1;
    --font-scale-old-exit-scale: 1.018;
}

[data-theme="dark"] {
    --c-bg-body: #0D0D0F; /* Deep void obsidian */
    --c-bg-soft: #1C1D20; /* Slightly raised touch area */
    --c-bg-card: #151618; /* Floating obsidian surface */
    --c-text: #D4D4D8; /* Soft night-glow text, preventing halation */
    --c-text-muted: #8E8E93;
    --c-border: rgba(255, 255, 255, 0.12); /* Ambient light border */
    --c-border-highlight: rgba(255, 255, 255, 0.05);
    --c-primary: #5E9CFF; /* Gentle neon blue for night reading */ /* Apple's blue in dark mode */
    --c-nav-bg: rgba(28, 28, 30, 0.72);
    --c-nav-hover: rgba(255, 255, 255, 0.1);
    --img-brightness: 0.8;
    --c-sidebar-bg: rgba(28, 28, 30, 0.6);
    --c-sidebar-hover: rgba(255, 255, 255, 0.08);
    --c-sidebar-active-bg: rgba(41, 151, 255, 0.15);
    --c-toc-panel-bg: rgba(21, 22, 24, 0.84);
    --c-toc-panel-border: rgba(255, 255, 255, 0.08);
    --c-toc-panel-shadow: 0 22px 48px rgba(0, 0, 0, 0.34);
    --c-toc-title: #9EA7B3;
    --c-toc-text: #AAB2BC;
    --c-toc-text-strong: #ECEFF3;
    --c-toc-hover-bg: rgba(255, 255, 255, 0.055);
    --c-toc-active-bg: rgba(94, 156, 255, 0.12);
    --c-toc-active-border: rgba(124, 181, 255, 0.66);
    --c-toc-nested-line: rgba(255, 255, 255, 0.08);
    --c-shadow-glass: 0 1px 2px rgba(0,0,0,0.2), 0 2px 4px rgba(0,0,0,0.2), 0 4px 8px rgba(0,0,0,0.2), 0 8px 16px rgba(0,0,0,0.2), 0 16px 32px rgba(0,0,0,0.3);
    --c-glass-border-top: rgba(255, 255, 255, 0.1);
}

/* 02-base.css */
/* =========================================
 *  2. BASE & RESET
 * ========================================= */
*, *::before, *::after { box-sizing: border-box; }
html {
    font-size: 1rem;
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--navbar-height) + 22px);
}

/* Text Selection */
::selection { background: var(--c-selection-bg, rgba(0, 102, 204, 0.15)); color: inherit; }
::-moz-selection { background: var(--c-selection-bg, rgba(0, 102, 204, 0.15)); color: inherit; }

/* Global Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background-color: rgba(134, 134, 139, 0.3); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background-color: rgba(134, 134, 139, 0.5); }

body {
    margin: 0; padding: 0;
    max-width: 100%; overflow-x: hidden;
    font-family: var(--font-sans); color: var(--c-text); background-color: var(--c-bg-body);
    transition: background-color 0.3s ease, color 0.3s ease;
    -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
}

a { color: var(--c-primary); text-decoration: none; transition: color 0.2s ease; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; transition: filter 0.3s ease; filter: brightness(var(--img-brightness)); }

/* 03-layout.css */
/* =========================================
 *  3. LAYOUT (APP SHELL)
 * ========================================= */
.app-layout {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    padding-top: var(--navbar-height);
}

.app-header {
    background-color: var(--c-nav-bg);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 0.5px solid var(--c-border);
    box-shadow: var(--c-shadow-glass);
    position: fixed;
    width: 100vw;
    top: 0;
    z-index: 1000;
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.app-header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    height: var(--navbar-height);
    padding: 0 32px;
    max-width: 1240px;
    margin: 0 auto;
    width: 100%;
}

.app-header-left {
    display: flex;
    align-items: center;
    gap: 8px;
}

.app-header-tools {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
    margin-left: auto; /* ensure it pushes to the right */
    min-width: 0;
    flex-shrink: 0;
}

.language-switcher,
.about-lang-switch {
    display: flex;
    align-items: center;
    gap: 12px;
}

.app-mobile-only {
    display: none;
}

.app-body {}

.app-sidebar {
    display: flex;
    flex-direction: column;
    width: 270px;
    flex-shrink: 0;
    border-right: 0.5px solid var(--c-border);
    background-color: var(--c-sidebar-bg);
    position: sticky;
    top: var(--navbar-height);
    height: calc(100vh - var(--navbar-height));
    overflow: hidden;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    backdrop-filter: saturate(180%) blur(20px);
}

.app-sidebar-header {
    display: flex;
    padding: 15px 18px 12px;
    border-bottom: 1px solid color-mix(in srgb, var(--c-border) 82%, transparent);
    align-items: center;
    justify-content: space-between;
}

.app-sidebar-title {
    margin: 0;
    font-size: 0.84rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    color: var(--c-toc-title);
}

.sidebar-close-btn {
    position: relative;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid transparent;
    background: transparent;
    color: var(--c-text-muted);
    cursor: pointer;
    transition: background-color 0.24s ease, color 0.24s ease, transform 0.24s ease, border-color 0.24s ease;
}

.sidebar-close-btn::before,
.sidebar-close-btn::after {
    content: "";
    position: absolute;
    inset: 50% auto auto 50%;
    width: 14px;
    height: 1.5px;
    margin-left: -7px;
    margin-top: -0.75px;
    border-radius: 999px;
    background: currentColor;
}

.sidebar-close-btn::before {
    transform: rotate(45deg);
}

.sidebar-close-btn::after {
    transform: rotate(-45deg);
}

.sidebar-close-btn:hover {
    background-color: var(--c-nav-hover);
    color: var(--c-text);
    border-color: rgba(0, 102, 204, 0.12);
}

.sidebar-close-btn:active {
    transform: scale(0.94);
}

.app-sidebar-content {
    flex: 1 1 auto;
    height: auto;
    min-height: 0;
    padding: 0;
    overflow-y: auto;
    overscroll-behavior-y: contain;
    -webkit-overflow-scrolling: touch;
    scrollbar-gutter: stable;
}

.app-sidebar-backdrop {
    display: none;
}

.app-sidebar-backdrop[hidden] {
    display: none;
}

.app-main {
    flex: 1;
    padding: 48px;
    min-width: 0; /* Prevents flex flex-wrap blowout */
}

/* Base Utility for generic responsive spacing */
.me-1 { margin-right: 4px; }
.ms-1 { margin-left: 4px; }
.ms-auto { margin-left: auto; }

@media (min-width: 576px) {
    .app-header-container { padding: 0 24px; }
    .me-sm-2 { margin-right: 8px; }
    .mx-sm-2 { margin-left: 8px; margin-right: 8px; }
    .d-none.d-sm-block { display: block; }
    .d-none.d-sm-inline { display: inline; }
}

@media (max-width: 991.98px) {
    .app-header-container {
        padding: 0 12px; /* 进一步压缩内边距 */
        gap: 10px;
    }

    .app-header-left,
    .app-header-tools {
        gap: 6px;
    }

    .font-controls-group {
        gap: 6px;
    }

    .app-body {
        flex-direction: column;
    }
    
    .app-mobile-only {
        display: inline-flex;
    }

    .app-sidebar {
        position: fixed;
        top: auto; bottom: 0; left: 0; width: 100vw; border-radius: 24px 24px 0 0; padding-top: 18px; box-shadow: 0 -10px 40px rgba(0,0,0,0.15); border-top: 1px solid var(--c-border); transition: transform 0.34s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.24s ease;
        height: auto; max-height: min(86vh, calc(100vh - 28px));
        z-index: 1050;
        background-color: var(--c-sidebar-bg);
        transform: translateY(120%);
        opacity: 0;
        pointer-events: none;
        box-shadow: 20px 0 60px rgba(0,0,0,0.1), var(--c-shadow-glass);
        -webkit-backdrop-filter: saturate(180%) blur(20px);
        backdrop-filter: saturate(180%) blur(20px);
    }
    
    .app-sidebar.show {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }
    
    .app-sidebar-header {
        display: flex;
        padding: 10px 16px 12px;
        border-bottom: 1px solid color-mix(in srgb, var(--c-border) 82%, transparent);
    }

    .app-sidebar-title {
        font-size: 1rem;
        letter-spacing: 0;
        color: var(--c-text);
    }

    .app-sidebar::before {
        content: "";
        position: absolute;
        top: 8px;
        left: 50%;
        width: 42px;
        height: 4px;
        border-radius: 999px;
        background: color-mix(in srgb, var(--c-text-muted) 26%, transparent);
        transform: translateX(-50%);
    }

    .app-sidebar-content {
        flex: 1 1 auto;
        max-height: calc(min(86vh, calc(100vh - 28px)) - 64px);
        padding-bottom: max(18px, env(safe-area-inset-bottom));
    }

    .app-sidebar-backdrop {
        position: fixed;
        inset: 0;
        z-index: 1040;
        display: block;
        border: 0;
        padding: 0;
        background: rgba(15, 23, 42, 0.24);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.24s ease;
    }

    .app-sidebar-backdrop[hidden] {
        display: none;
    }

    body.sidebar-open .app-sidebar-backdrop {
        opacity: 1;
        pointer-events: auto;
    }
    
    .app-main {
        padding: 24px 16px;
        width: 100%; /* Important constraint */
        max-width: 100vw;
    }
}

.d-none { display: none; }

/* 04-navigation.css */
/* =========================================
 *  4. NAVIGATION & CONTROLS (FIXED)
 * ========================================= */

/* --- 4.1 通用圆形按钮 (月亮, 菜单) --- */
.nav-round-btn {
    display: inline-flex; align-items: center; justify-content: center;
    width: 38px; height: 38px; border-radius: 50%;
    border: 1px solid transparent; background: transparent;
    color: var(--c-text-muted); transition: all 0.2s ease;
    cursor: pointer; text-decoration: none; padding: 0; /* 强制去padding */
}
.nav-round-btn:hover {
    background-color: var(--c-nav-hover); color: var(--c-text); transform: scale(1.05);
}
.nav-round-btn:active {
    transform: scale(0.95); background-color: var(--c-border);
}
/* [修复] 强制图标绝对居中，消除 line-height 偏差 */
.nav-round-btn i {
    display: flex; align-items: center; justify-content: center;
    width: 100%; height: 100%; line-height: 1; margin: 0;
}

/* --- 4.2 左上角智能按钮 --- */
.smart-nav-link {
    display: inline-flex; align-items: center; justify-content: center;
    width: 36px; height: 36px; border-radius: 50%;
    color: var(--c-text-muted); transition: all 0.2s ease;
    text-decoration: none; border: 1px solid transparent; padding: 0;
}
.smart-nav-link:hover {
    background-color: var(--c-nav-hover); color: var(--c-text); text-decoration: none; transform: scale(1.05);
}
.smart-nav-link:active {
    background-color: var(--c-border); transform: scale(0.95);
}
.smart-nav-link i { font-size: 1.1rem; line-height: 1; }

.header-tools-separator {
    width: 1px;
    height: 24px;
    margin: 0 4px;
    background-color: var(--c-border);
}

/* --- 4.3 语言切换 --- */
.lang-capsule-btn,
.about-lang-chip {
    position: relative;
    isolation: isolate;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    padding: 0;
    border-radius: 50%;
    border: 1px solid rgba(0, 0, 0, 0.08);
    background: color-mix(in srgb, var(--c-nav-bg) 86%, transparent);
    box-shadow: inset 0 1px 0 var(--c-glass-border-top), 0 8px 18px rgba(0,0,0,0.06);
    color: var(--c-text-muted);
    text-decoration: none;
    transition: transform 0.24s ease, background-color 0.24s ease, border-color 0.24s ease, box-shadow 0.24s ease, color 0.24s ease;
    flex-shrink: 0;
}

.lang-capsule-btn::before,
.about-lang-chip::before {
    content: "";
    position: absolute;
    inset: 5px;
    border-radius: inherit;
    pointer-events: none;
    background: radial-gradient(circle at 32% 28%, rgba(255,255,255,0.58), transparent 60%), linear-gradient(180deg, rgba(255,255,255,0.16), transparent 78%);
    opacity: 0.68;
    transition: opacity 0.24s ease, transform 0.28s cubic-bezier(0.22, 1, 0.36, 1);
}

.lang-capsule-btn:hover,
.about-lang-chip:hover {
    background: color-mix(in srgb, var(--c-bg-card) 94%, transparent);
    border-color: color-mix(in srgb, var(--c-primary) 18%, var(--c-toc-panel-border));
    color: var(--c-text);
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: inset 0 1px 0 var(--c-glass-border-top), 0 12px 22px rgba(0,0,0,0.1);
}

.lang-capsule-btn:hover::before,
.about-lang-chip:hover::before {
    opacity: 0.92;
    transform: scale(1.02);
}

.lang-capsule-btn:active,
.about-lang-chip:active {
    transform: scale(0.95);
    background: color-mix(in srgb, var(--c-nav-bg) 78%, transparent);
    box-shadow: none;
}

.lang-capsule-btn.is-loading,
.about-lang-chip.is-loading {
    pointer-events: none;
    background: color-mix(in srgb, var(--c-nav-bg) 90%, transparent);
    border-color: color-mix(in srgb, var(--c-primary) 16%, var(--c-toc-panel-border));
    color: var(--c-text);
    transform: none;
    box-shadow: 0 6px 16px rgba(0,0,0,0.08);
}

.icon-lang-switch {
    overflow: visible;
}

.lang-capsule-btn.is-loading .icon-lang-switch,
.about-lang-chip.is-loading .icon-lang-switch {
    animation: lang-switch-breathe 0.88s ease-in-out infinite;
}

.icon-lang-switch * {
    transform-box: fill-box;
    transform-origin: center;
}

.lang-switch-ring,
.lang-switch-meridian,
.lang-switch-latitude {
    transition: transform 0.34s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.28s ease, stroke 0.28s ease;
}

.lang-switch-ring {
    opacity: 0.94;
}

.lang-switch-meridian {
    opacity: 0.74;
}

.lang-switch-latitude-top,
.lang-switch-latitude-bottom {
    opacity: 0.6;
}

.lang-capsule-btn:hover .lang-switch-ring,
.about-lang-chip:hover .lang-switch-ring {
    transform: scale(1.03);
}

.lang-capsule-btn:hover .lang-switch-meridian-left,
.about-lang-chip:hover .lang-switch-meridian-left {
    transform: translateX(-0.45px) rotate(-4deg);
    opacity: 0.9;
}

.lang-capsule-btn:hover .lang-switch-meridian-right,
.about-lang-chip:hover .lang-switch-meridian-right {
    transform: translateX(0.45px) rotate(4deg);
    opacity: 0.9;
}

.lang-capsule-btn:hover .lang-switch-latitude-main,
.about-lang-chip:hover .lang-switch-latitude-main {
    transform: scaleX(0.94);
}

.lang-capsule-btn:hover .lang-switch-latitude-top,
.about-lang-chip:hover .lang-switch-latitude-top {
    transform: translateY(-0.45px);
    opacity: 0.78;
}

.lang-capsule-btn:hover .lang-switch-latitude-bottom,
.about-lang-chip:hover .lang-switch-latitude-bottom {
    transform: translateY(0.45px);
    opacity: 0.78;
}

.about-lang-switch {
    margin-bottom: 2rem;
}

[data-theme="dark"] .lang-capsule-btn,
[data-theme="dark"] .about-lang-chip {
    border-color: rgba(255, 255, 255, 0.12);
    background: color-mix(in srgb, var(--c-nav-bg) 90%, transparent);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.06), 0 10px 22px rgba(0,0,0,0.26);
}

[data-theme="dark"] .lang-capsule-btn::before,
[data-theme="dark"] .about-lang-chip::before {
    background: radial-gradient(circle at 32% 28%, rgba(255,255,255,0.16), transparent 58%), linear-gradient(180deg, rgba(255,255,255,0.08), transparent 76%);
}

[data-theme="dark"] .lang-capsule-btn:hover,
[data-theme="dark"] .about-lang-chip:hover {
    background: rgba(255,255,255,0.08);
    border-color: rgba(94, 156, 255, 0.28);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.08), 0 12px 24px rgba(0,0,0,0.28);
}

@keyframes lang-switch-breathe {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(0.94); opacity: 0.78; }
}

/* --- 4.4 字体控制组 --- */
.font-controls-group {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.font-control-btn {
    position: relative;
    overflow: hidden;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: 1px solid rgba(0, 0, 0, 0.08);
    background: color-mix(in srgb, var(--c-nav-bg) 84%, transparent);
    box-shadow: inset 0 1px 0 var(--c-glass-border-top), 0 8px 18px rgba(0,0,0,0.06);
    color: var(--c-text);
    transition: transform 0.28s cubic-bezier(0.22, 1, 0.36, 1), background-color 0.28s ease, border-color 0.28s ease, box-shadow 0.28s ease, color 0.24s ease, opacity 0.24s ease;
    touch-action: manipulation;
    user-select: none;
}

.font-control-btn::before,
.font-control-btn::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    pointer-events: none;
}

.font-control-btn::before {
    inset: 5px;
    background: radial-gradient(circle at 32% 28%, rgba(255,255,255,0.68), transparent 62%), radial-gradient(circle at 70% 78%, rgba(0, 102, 204, 0.16), transparent 60%);
    opacity: 0.32;
    transform: scale(0.76);
    transition: transform 0.34s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.28s ease;
}

.font-control-btn::after {
    border: 1px solid rgba(0, 102, 204, 0.22);
    opacity: 0;
    transform: scale(0.72);
}

.font-control-btn:hover {
    background-color: color-mix(in srgb, var(--c-bg-card) 94%, transparent);
    border-color: rgba(0, 102, 204, 0.16);
    color: var(--c-text);
    transform: translateY(-1px);
    box-shadow: inset 0 1px 0 var(--c-glass-border-top), 0 12px 22px rgba(0,0,0,0.1);
}

.font-control-btn:hover::before {
    opacity: 0.88;
    transform: scale(1);
}

.font-control-btn:active {
    transform: scale(0.94);
    box-shadow: inset 0 1px 0 var(--c-glass-border-top);
}

.font-control-btn.is-animating::before {
    opacity: 1;
    transform: scale(1.08);
}

.font-control-btn.is-animating::after {
    animation: font-control-ring 0.44s cubic-bezier(0.22, 1, 0.36, 1);
}

.font-control-btn:disabled {
    opacity: 0.46;
    cursor: default;
    box-shadow: inset 0 1px 0 var(--c-glass-border-top);
}

.font-control-btn:disabled:hover,
.font-control-btn:disabled:active {
    transform: none;
    background: color-mix(in srgb, var(--c-nav-bg) 84%, transparent);
    border-color: rgba(0, 0, 0, 0.08);
    box-shadow: inset 0 1px 0 var(--c-glass-border-top);
}

.font-control-btn:disabled::before {
    opacity: 0.18;
    transform: scale(0.7);
}

[data-theme="dark"] .font-control-btn {
    border-color: rgba(255, 255, 255, 0.12);
    background: color-mix(in srgb, var(--c-nav-bg) 90%, transparent);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.06), 0 10px 22px rgba(0,0,0,0.26);
}

[data-theme="dark"] .font-control-btn::before {
    background: radial-gradient(circle at 32% 28%, rgba(255,255,255,0.18), transparent 58%), radial-gradient(circle at 70% 78%, rgba(94, 156, 255, 0.24), transparent 62%);
}

[data-theme="dark"] .font-control-btn:hover {
    background-color: rgba(255,255,255,0.08);
    border-color: rgba(94, 156, 255, 0.28);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.08), 0 12px 24px rgba(0,0,0,0.28);
}

[data-theme="dark"] .font-control-btn:disabled:hover,
[data-theme="dark"] .font-control-btn:disabled:active {
    background: color-mix(in srgb, var(--c-nav-bg) 90%, transparent);
    border-color: rgba(255,255,255,0.12);
}

.font-scale-label {
    position: relative;
    z-index: 1;
    display: inline-block;
    font-family: var(--font-sans);
    font-weight: 700;
    line-height: 1;
    transform: translateY(-0.02em);
    transition: transform 0.28s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.24s ease, letter-spacing 0.24s ease;
}

.font-scale-label-small {
    font-size: 0.82rem;
    opacity: 0.72;
}

.font-scale-label-large {
    font-size: 1.02rem;
}

.small-a-btn {
    color: var(--c-text-muted);
}

.large-a-btn {
    color: var(--c-text);
}

.font-control-btn:hover .font-scale-label-small {
    transform: translateY(-0.05em) scale(0.94);
}

.font-control-btn:hover .font-scale-label-large {
    transform: translateY(-0.05em) scale(1.08);
}

@media (max-width: 991.98px) {
    .lang-capsule-btn,
    .about-lang-chip {
        width: 38px;
        height: 38px;
    }
}

.theme-toggle {
    position: relative;
    overflow: hidden;
    isolation: isolate;
    color: var(--c-text-muted);
}

.theme-toggle::before,
.theme-toggle::after {
    content: "";
    position: absolute;
    inset: 4px;
    border-radius: inherit;
    pointer-events: none;
    transition: opacity 0.42s ease, transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.theme-toggle::before {
    background: radial-gradient(circle at 35% 35%, rgba(255, 194, 77, 0.28), transparent 62%);
    opacity: 0.82;
}

.theme-toggle::after {
    inset: 2px;
    background: radial-gradient(circle at center, rgba(94, 156, 255, 0.22), transparent 68%);
    opacity: 0;
    transform: scale(0.68);
}

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

.theme-toggle.is-animating::before {
    transform: scale(1.12);
}

.theme-toggle.is-animating::after {
    opacity: 1;
    transform: scale(1.18);
}

[data-theme="dark"] .theme-toggle {
    color: #ffd46b;
}

[data-theme="dark"] .theme-toggle::before {
    opacity: 0;
    transform: scale(0.75);
}

[data-theme="dark"] .theme-toggle::after {
    opacity: 0.88;
    transform: scale(1);
}

/* 05-article.css */
/* =========================================
 *  5. TYPOGRAPHY & ARTICLE
 * ========================================= */
.article-body {
    max-width: min(100%, var(--reader-measure-latin));
    margin: 0 auto;
    font-size: clamp(1rem, 0.8rem + 1vw, 1.2rem);
    font-size: calc(clamp(1rem, 0.8rem + 1vw, 1.2rem) * var(--reader-scale));
    line-height: var(--reader-line-height-latin);
    letter-spacing: var(--tracking-latin);
    word-spacing: var(--word-space-latin);
    font-kerning: normal;
    text-rendering: optimizeLegibility;
    hyphens: manual;
    line-break: auto;
    overflow-wrap: break-word;
    word-wrap: break-word;
    text-wrap: pretty;
    hanging-punctuation: none;
    text-align: start;
    text-justify: auto;
    text-spacing-trim: normal;
    text-autospace: normal;
    transition: font-size 0.26s cubic-bezier(0.22, 1, 0.36, 1);
}
.article-body .page-title {
    display: block;
    font-family: var(--font-sans);
    font-size: clamp(2rem, 5vw, 2.8rem);
    font-size: calc(clamp(2rem, 5vw, 2.8rem) * var(--reader-scale)); /* Fluid typography */
    font-weight: 700;
    margin-bottom: 1rem; line-height: clamp(1.2, 1.1 + 0.5vw, 1.4); color: var(--c-text);
    text-wrap: balance;
    transition: font-size 0.26s cubic-bezier(0.22, 1, 0.36, 1);
}
.article-body .page-subtitle {
    max-width: 56ch;
    margin-top: -0.35rem;
    margin-bottom: clamp(2rem, 4vw, 3rem);
    color: var(--c-text-muted);
    font-size: calc(clamp(1rem, 1.8vw, 1.18rem) * var(--reader-scale));
    line-height: 1.55;
    letter-spacing: 0.01em;
    text-align: start;
}
.article-body h1, .article-body h2, .article-body h3, .article-body h4 {
    font-family: var(--font-sans); font-weight: 700; line-height: clamp(1.3, 1.2 + 0.5vw, 1.5);
    margin-top: clamp(2em, 4vw, 2.5em); margin-bottom: clamp(0.8em, 2vw, 1em); color: var(--c-text);
    transition: font-size 0.26s cubic-bezier(0.22, 1, 0.36, 1);
}

.article-body :is(h1, h2, h3, h4, h5, h6)[id] {
    scroll-margin-top: calc(var(--navbar-height) + 24px);
}

.article-body :is(h1, h2, h3, h4, h5, h6)[id] {
    scroll-margin-top: calc(var(--navbar-height) + 22px);
}
.article-body h2 {
    font-size: clamp(1.6rem, 3vw, 2rem);
    font-size: calc(clamp(1.6rem, 3vw, 2rem) * var(--reader-scale)); border-bottom: 1px solid var(--c-border); padding-bottom: 0.4em;
    text-wrap: balance;
}
.article-body h3 {
    font-size: clamp(1.4rem, 2.5vw, 1.6rem);
    font-size: calc(clamp(1.4rem, 2.5vw, 1.6rem) * var(--reader-scale));
}

/* Modern Hyperlink offsets */
.article-body a {
    color: var(--c-primary);
    text-decoration: underline;
    text-underline-offset: 4px;
    text-decoration-thickness: 1px;
    text-decoration-color: var(--c-border);
    text-decoration-skip-ink: auto;
    transition: text-decoration-color 0.2s ease;
}
.article-body a:hover {
    text-decoration-color: var(--c-primary);
}

.article-body p {
    margin-bottom: var(--reader-paragraph-gap-latin);
    hanging-punctuation: none;
}

.article-figure {
    margin: 0 0 2rem;
    text-align: center;
}

.article-figure img {
    max-width: 100%;
    height: auto;
    border: 1px solid var(--c-border);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.article-figure-caption {
    margin-top: 0.5rem;
    color: var(--c-text-muted);
    font-size: 0.9em;
    font-style: italic;
}

.article-signature {
    margin-top: 3rem;
    border-left: 0;
    background: transparent;
    text-align: right;
    font-style: normal;
}

.article-comparison-table {
    width: 100%;
    border-collapse: collapse;
    margin: clamp(1.5em, 3vw, 2em) 0;
    border: 1px solid var(--c-border);
}

.article-comparison-table th,
.article-comparison-table td {
    padding: 8px;
    border: 1px solid var(--c-border);
    vertical-align: top;
}

.article-comparison-table th {
    text-align: left;
    background: var(--c-bg-soft);
}

html:lang(zh-CN) .article-body,
html:lang(zh-CN) .post-excerpt,
html:lang(zh-CN) .home-hero-subtitle {
    letter-spacing: var(--tracking-zh);
    word-spacing: var(--word-space-zh);
    line-break: loose;
    text-align: start;
    text-justify: auto;
}

html:lang(zh-CN) .article-body {
    max-width: min(100%, var(--reader-measure-cjk));
    line-height: var(--reader-line-height-cjk);
}

html:lang(zh-CN) .article-body p {
    margin-bottom: var(--reader-paragraph-gap-cjk);
}

html:lang(zh-CN) .article-body,
html:lang(zh-CN) .article-body .page-title,
html:lang(zh-CN) .article-body h1,
html:lang(zh-CN) .article-body h2,
html:lang(zh-CN) .article-body h3,
html:lang(zh-CN) .article-body h4 {
    transition: none;
}

.article-body.is-font-scaling {
    will-change: transform;
    backface-visibility: hidden;
}

html:lang(en) .article-body,
html:lang(en-US) .article-body,
html:lang(en) .post-excerpt,
html:lang(en-US) .post-excerpt {
    hyphens: auto;
    text-align: start;
    text-justify: auto;
}
.article-body :is(blockquote, .blockquote) {
    position: relative;
    margin: clamp(1.5em, 3vw, 2em) 0;
    padding: clamp(1em, 2vw, 1.5em) clamp(1.25em, 3vw, 1.8em);
    overflow: hidden;
    background: color-mix(in srgb, var(--c-bg-soft) 86%, var(--c-bg-card));
    border: 1px solid color-mix(in srgb, var(--c-text-muted) 18%, var(--c-border));
    border-radius: 18px;
    box-shadow: inset 0 1px 0 var(--c-border-highlight);
    color: var(--c-text-muted);
    font-size: clamp(0.9em, 0.85em + 0.25vw, 0.95em);
}

.article-body :is(blockquote, .blockquote)::before {
    content: "“";
    position: absolute;
    top: -0.32em;
    right: 0.18em;
    color: color-mix(in srgb, var(--c-primary) 12%, transparent);
    font-family: var(--font-serif);
    font-size: 5.2em;
    line-height: 1;
    pointer-events: none;
}

/* 06-annotation-guide.css */
/* Article Module: annotation guide dual-mode tables */
.annotation-guide-page {
    --annotation-surface-border: color-mix(in srgb, var(--c-text-muted) 28%, transparent);
    --annotation-surface-bg: linear-gradient(180deg, color-mix(in srgb, var(--c-bg-card) 98%, transparent), color-mix(in srgb, var(--c-bg-soft) 78%, var(--c-bg-card)));
    --annotation-surface-shadow: 0 14px 32px rgba(15, 23, 42, 0.055);
    --annotation-accent-soft: color-mix(in srgb, var(--c-primary) 12%, transparent);
    --annotation-muted-line: color-mix(in srgb, var(--c-text-muted) 20%, transparent);
    --annotation-focus-lead-bg: color-mix(in srgb, var(--c-bg-soft) 92%, var(--c-bg-card));
    --annotation-focus-label: color-mix(in srgb, var(--c-text-muted) 92%, transparent);
    --annotation-focus-example-text: color-mix(in srgb, var(--c-text-muted) 84%, var(--c-text) 16%);
    --annotation-table-min-width: 58rem;
    --annotation-table-header-offset: calc(var(--navbar-height) + 14px);
    --annotation-table-scrollbar: color-mix(in srgb, var(--c-primary) 28%, rgba(134, 134, 139, 0.36));
}

[data-theme="dark"] .annotation-guide-page {
    --annotation-surface-border: rgba(255, 255, 255, 0.12);
    --annotation-surface-bg: linear-gradient(180deg, rgba(25, 26, 29, 0.98), rgba(18, 19, 22, 0.96));
    --annotation-surface-shadow: 0 18px 36px rgba(0, 0, 0, 0.28);
    --annotation-accent-soft: rgba(94, 156, 255, 0.16);
    --annotation-muted-line: rgba(255, 255, 255, 0.08);
    --annotation-focus-lead-bg: rgba(255, 255, 255, 0.06);
    --annotation-focus-label: rgba(255, 255, 255, 0.64);
    --annotation-focus-example-text: rgba(255, 255, 255, 0.72);
    --annotation-table-scrollbar: color-mix(in srgb, var(--c-primary) 42%, rgba(255, 255, 255, 0.18));
}

.annotation-guide-page .annotation-guide-controls {
    margin: 2rem 0 2.5rem;
    padding: 1rem 1.1rem 0.95rem;
    border: 1px solid var(--annotation-surface-border);
    border-radius: 26px;
    background: var(--annotation-surface-bg);
    box-shadow: var(--annotation-surface-shadow);
}

.annotation-guide-page .annotation-guide-controls-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.annotation-guide-page .annotation-guide-controls-label {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--annotation-focus-label);
}

.annotation-guide-page .annotation-guide-controls-note {
    margin: 0.72rem 0 0;
    font-size: 0.9rem;
    line-height: 1.56;
    color: var(--c-text-muted);
}

.annotation-guide-page .annotation-guide-compare-hint {
    display: inline-flex;
    align-items: center;
    margin: 0.72rem 0 0;
    padding: 0.54rem 0.8rem;
    border-radius: 999px;
    border: 1px solid color-mix(in srgb, var(--annotation-accent-soft) 55%, var(--annotation-surface-border));
    background: color-mix(in srgb, var(--annotation-accent-soft) 40%, var(--c-bg-card));
    color: var(--c-text-muted);
    font-family: var(--font-sans);
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    opacity: 0;
    transform: translateY(-4px);
    transition: opacity 0.22s ease, transform 0.22s ease;
}

.annotation-guide-page .annotation-guide-compare-hint[data-state="visible"] {
    opacity: 1;
    transform: translateY(0);
}

.annotation-guide-page .annotation-guide-mode-toggle {
    display: inline-flex;
    align-items: center;
    padding: 4px;
    border-radius: 999px;
    border: 1px solid var(--annotation-surface-border);
    background: color-mix(in srgb, var(--c-bg-soft) 84%, transparent);
    box-shadow: inset 0 1px 0 var(--c-glass-border-top);
}

.annotation-guide-page .annotation-guide-mode-btn {
    appearance: none;
    border: 0;
    background: transparent;
    color: var(--c-text-muted);
    border-radius: 999px;
    padding: 0.72rem 1rem;
    font: inherit;
    font-size: 0.95rem;
    font-weight: 700;
    line-height: 1;
    cursor: pointer;
    transition: background-color 0.22s ease, color 0.22s ease, transform 0.22s ease, box-shadow 0.22s ease;
}

.annotation-guide-page .annotation-guide-mode-btn:hover {
    color: var(--c-text);
}

.annotation-guide-page .annotation-guide-mode-btn.is-active {
    background: var(--c-bg-card);
    color: var(--c-text);
    box-shadow: 0 8px 18px rgba(15, 23, 42, 0.1);
}

[data-theme="dark"] .annotation-guide-page .annotation-guide-mode-btn.is-active {
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.22);
}

.annotation-guide-page .annotation-guide-surface-stack {
    margin-top: 1.15rem;
}

.annotation-guide-page [data-annotation-view] {
    display: none;
}

.annotation-guide-page[data-annotation-mode="focus"] [data-annotation-view="focus"],
.annotation-guide-page[data-annotation-mode="compare"] [data-annotation-view="compare"] {
    display: block;
}

@media (max-width: 767.98px) {
    .annotation-guide-page:not([data-annotation-mode]) [data-annotation-view="focus"] {
        display: block;
    }
}

@media (min-width: 768px) {
    .annotation-guide-page:not([data-annotation-mode]) [data-annotation-view="compare"] {
        display: block;
    }
}

.annotation-guide-page .annotation-guide-section-block + .annotation-guide-section-block {
    margin-top: clamp(1.3rem, 2.6vw, 2rem);
}

.annotation-guide-page .annotation-guide-section-block > p {
    margin-bottom: 0.9rem;
    color: var(--c-text-muted);
}

.annotation-guide-page .annotation-guide-focus-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 12px;
}

.annotation-guide-page .annotation-guide-focus-item {
    padding: clamp(16px, 2.2vw, 20px);
    border: 1px solid var(--annotation-surface-border);
    border-radius: 22px;
    background: var(--annotation-surface-bg);
    box-shadow: var(--annotation-surface-shadow);
}

.annotation-guide-page .annotation-guide-focus-summary {
    display: grid;
    grid-template-columns: minmax(82px, 104px) minmax(0, 1fr);
    gap: 14px;
    align-items: start;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--annotation-muted-line);
}

.annotation-guide-page .annotation-guide-focus-lead {
    display: inline-flex;
    align-items: center;
    justify-content: flex-start;
    min-height: 42px;
    padding: 8px 11px;
    border-radius: 16px;
    background: var(--annotation-focus-lead-bg);
    color: var(--c-text);
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    font-size: 0.88rem;
    line-height: 1.35;
    text-align: left;
    box-shadow: inset 0 1px 0 var(--c-glass-border-top);
}

.annotation-guide-page .annotation-guide-focus-lead code {
    white-space: nowrap;
}

.annotation-guide-page .annotation-guide-focus-name {
    font-family: var(--font-sans);
    font-size: clamp(1rem, 0.94rem + 0.26vw, 1.08rem);
    line-height: 1.38;
    letter-spacing: -0.012em;
    color: var(--c-text);
}

.annotation-guide-page .annotation-guide-focus-name strong,
.annotation-guide-page .annotation-guide-table strong {
    color: var(--c-text);
}

.annotation-guide-page .annotation-guide-focus-details {
    margin: 12px 0 0;
    display: grid;
    gap: 10px;
}

.annotation-guide-page .annotation-guide-focus-field {
    display: grid;
    gap: 5px;
}

.annotation-guide-page .annotation-guide-focus-field dt {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--annotation-focus-label);
}

.annotation-guide-page .annotation-guide-focus-field dd {
    margin: 0;
    color: var(--c-text);
    line-height: 1.68;
}

.annotation-guide-page .annotation-guide-focus-field-secondary {
    padding-top: 10px;
    border-top: 1px solid var(--annotation-muted-line);
}

.annotation-guide-page .annotation-guide-focus-field-secondary dd {
    color: var(--annotation-focus-example-text);
    font-size: 0.96em;
    line-height: 1.62;
}

.annotation-guide-page .annotation-guide-compare-shell {
    position: relative;
    border: 1px solid var(--annotation-surface-border);
    border-radius: 26px;
    background: var(--annotation-surface-bg);
    box-shadow: var(--annotation-surface-shadow);
    overflow: hidden;
}

.annotation-guide-page .annotation-guide-compare-shell::before,
.annotation-guide-page .annotation-guide-compare-shell::after {
    content: "";
    position: absolute;
    top: 0;
    bottom: 12px;
    width: 24px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.24s ease;
    z-index: 4;
}

.annotation-guide-page .annotation-guide-compare-shell::before {
    left: 0;
    background: linear-gradient(90deg, color-mix(in srgb, var(--c-bg-card) 96%, transparent), transparent);
}

.annotation-guide-page .annotation-guide-compare-shell::after {
    right: 0;
    background: linear-gradient(270deg, color-mix(in srgb, var(--c-bg-card) 96%, transparent), transparent);
}

[data-theme="dark"] .annotation-guide-page .annotation-guide-compare-shell::before {
    background: linear-gradient(90deg, rgba(18, 19, 22, 0.98), transparent);
}

[data-theme="dark"] .annotation-guide-page .annotation-guide-compare-shell::after {
    background: linear-gradient(270deg, rgba(18, 19, 22, 0.98), transparent);
}

.annotation-guide-page .annotation-guide-compare-shell[data-scroll-left="true"]::before,
.annotation-guide-page .annotation-guide-compare-shell[data-scroll-right="true"]::after {
    opacity: 0.72;
}

.annotation-guide-page .annotation-guide-table-scroll {
    position: relative;
    width: 100%;
    margin: 0;
    padding: 0 0 8px;
    overflow-x: auto;
    overflow-y: hidden;
    overscroll-behavior-x: contain;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-x;
    scrollbar-gutter: stable both-edges;
    scrollbar-width: thin;
    scrollbar-color: var(--annotation-table-scrollbar) transparent;
}

.annotation-guide-page .annotation-guide-table-scroll::-webkit-scrollbar {
    height: 10px;
}

.annotation-guide-page .annotation-guide-table-scroll::-webkit-scrollbar-track {
    background: transparent;
}

.annotation-guide-page .annotation-guide-table-scroll::-webkit-scrollbar-thumb {
    background: var(--annotation-table-scrollbar);
    border-radius: 999px;
}

.annotation-guide-page .annotation-guide-table {
    width: auto;
    min-width: max(100%, var(--annotation-table-min-width));
    margin: 0;
    table-layout: auto;
    border-collapse: separate;
    border-spacing: 0;
    background: transparent;
    border: 0;
    box-shadow: none;
}

.annotation-guide-page .annotation-guide-table th,
.annotation-guide-page .annotation-guide-table td {
    padding: 13px 15px;
    color: var(--c-text);
    line-height: 1.62;
    border-right: 1px solid var(--annotation-surface-border);
    border-bottom: 1px solid var(--annotation-surface-border);
    background: color-mix(in srgb, var(--c-bg-card) 96%, transparent);
    vertical-align: top;
    word-break: normal;
    overflow-wrap: break-word;
}

.annotation-guide-page .annotation-guide-table thead th {
    position: sticky;
    top: var(--annotation-table-header-offset);
    z-index: 4;
    background: color-mix(in srgb, var(--c-bg-card) 98%, var(--c-bg-soft) 2%);
    color: var(--c-text);
    font-weight: 700;
    font-size: 0.88rem;
    letter-spacing: 0.02em;
    box-shadow: inset 0 -1px 0 var(--annotation-surface-border), 0 1px 0 color-mix(in srgb, var(--annotation-muted-line) 78%, transparent);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}

[data-theme="dark"] .annotation-guide-page .annotation-guide-table thead th {
    background: color-mix(in srgb, var(--c-bg-card) 97%, rgba(255, 255, 255, 0.03));
}

.annotation-guide-page .annotation-guide-table :is(th, td):first-child {
    position: sticky;
    left: 0;
    z-index: 2;
    min-width: 8.2rem;
    background: color-mix(in srgb, var(--c-bg-card) 98%, transparent);
    box-shadow: 6px 0 10px -10px rgba(15, 23, 42, 0.34);
    white-space: nowrap;
    transition: box-shadow 0.22s ease, background-color 0.22s ease;
}

.annotation-guide-page .annotation-guide-table thead th:first-child {
    z-index: 6;
}

[data-theme="dark"] .annotation-guide-page .annotation-guide-table :is(th, td):first-child {
    background: color-mix(in srgb, var(--c-bg-card) 98%, #08090B 2%);
    box-shadow: 6px 0 10px -10px rgba(0, 0, 0, 0.56);
}

.annotation-guide-page .annotation-guide-compare-shell[data-scroll-left="true"] .annotation-guide-table :is(th, td):first-child {
    box-shadow: 16px 0 22px -16px rgba(15, 23, 42, 0.42);
}

[data-theme="dark"] .annotation-guide-page .annotation-guide-compare-shell[data-scroll-left="true"] .annotation-guide-table :is(th, td):first-child {
    box-shadow: 16px 0 22px -16px rgba(0, 0, 0, 0.72);
}

.annotation-guide-page .annotation-guide-table :is(th, td):nth-child(2) {
    min-width: 12rem;
}

.annotation-guide-page .annotation-guide-table :is(th, td):nth-child(3),
.annotation-guide-page .annotation-guide-table :is(th, td):nth-child(4) {
    min-width: 21rem;
}

.annotation-guide-page .annotation-guide-table tbody tr:nth-child(even) td:not(:first-child) {
    background: color-mix(in srgb, var(--c-bg-soft) 58%, var(--c-bg-card));
}

[data-theme="dark"] .annotation-guide-page .annotation-guide-table tbody tr:nth-child(even) td:not(:first-child) {
    background: rgba(255, 255, 255, 0.03);
}

.annotation-guide-page .annotation-guide-table tr > *:last-child {
    border-right: 0;
}

.annotation-guide-page .annotation-guide-table tbody tr:last-child > * {
    border-bottom: 0;
}

.annotation-guide-page .annotation-guide-table code {
    white-space: nowrap;
}

@media (max-width: 991.98px) {
    .annotation-guide-page {
        --annotation-table-min-width: 48rem;
    }
}

@media (max-width: 767.98px) {
    .annotation-guide-page {
        --annotation-table-min-width: 44rem;
        --annotation-table-header-offset: calc(var(--navbar-height) + 10px);
    }

    .annotation-guide-page .annotation-guide-controls {
        margin: 1.8rem 0 2.1rem;
        padding: 0.9rem;
        border-radius: 22px;
    }

    .annotation-guide-page .annotation-guide-controls-head {
        flex-direction: column;
        align-items: stretch;
    }

    .annotation-guide-page .annotation-guide-mode-toggle {
        width: 100%;
    }

    .annotation-guide-page .annotation-guide-mode-btn {
        flex: 1 1 50%;
        justify-content: center;
        text-align: center;
        padding: 0.78rem 0.8rem;
    }

    .annotation-guide-page .annotation-guide-controls-note {
        font-size: 0.86rem;
    }

    .annotation-guide-page .annotation-guide-compare-hint {
        margin-top: 0.6rem;
        padding: 0.5rem 0.72rem;
        font-size: 0.78rem;
    }

    .annotation-guide-page .annotation-guide-focus-item {
        border-radius: 20px;
        padding: 14px;
    }

    .annotation-guide-page .annotation-guide-focus-summary {
        grid-template-columns: 1fr;
        gap: 10px;
        padding-bottom: 10px;
    }

    .annotation-guide-page .annotation-guide-focus-lead {
        justify-content: flex-start;
        width: fit-content;
        max-width: 100%;
        text-align: left;
        min-height: 0;
        padding: 7px 10px;
        font-size: 0.84rem;
    }

    .annotation-guide-page .annotation-guide-compare-shell {
        border-radius: 22px;
    }

    .annotation-guide-page .annotation-guide-compare-shell::before,
    .annotation-guide-page .annotation-guide-compare-shell::after {
        width: 20px;
    }

    .annotation-guide-page .annotation-guide-table th,
    .annotation-guide-page .annotation-guide-table td {
        padding: 11px 12px;
        font-size: 0.92em;
    }

    .annotation-guide-page .annotation-guide-table :is(th, td):first-child {
        min-width: 7.1rem;
    }

    .annotation-guide-page .annotation-guide-table :is(th, td):nth-child(2) {
        min-width: 10.5rem;
    }

    .annotation-guide-page .annotation-guide-table :is(th, td):nth-child(3),
    .annotation-guide-page .annotation-guide-table :is(th, td):nth-child(4) {
        min-width: 17.5rem;
    }
}

/* 07-sidebar-toc.css */
/* =========================================
 *  6. SIDEBAR & TOC
 * ========================================= */
#sidebarMenu.offcanvas-lg, .offcanvas {
    background-color: var(--c-sidebar-bg);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    backdrop-filter: saturate(180%) blur(20px);
    border-right: 0.5px solid var(--c-border);
    box-shadow: 20px 0 60px rgba(0,0,0,0.05), var(--c-shadow-glass); 
    color: var(--c-text);
}
[data-theme="dark"] .offcanvas { 
    box-shadow: 20px 0 60px rgba(0,0,0,0.4), var(--c-shadow-glass); 
}
.offcanvas-header { padding: 1.5rem 1.5rem 1rem 1.5rem; border-bottom: 1px solid transparent; }
.offcanvas-title, #sidebarMenu h5 {
    font-family: var(--font-sans); font-weight: 800; font-size: 1.5rem; letter-spacing: -0.02em;
    color: var(--c-text); opacity: 0.9;
}
.btn-close { transition: filter 0.3s ease; }
[data-theme="dark"] .btn-close { filter: invert(1) grayscale(100%) brightness(200%); }


/* Apple-style TOC: remove bullets completely */
.table-of-contents ul, .table-of-contents ol,
.toc-tree, .toc-tree ul, .toc-tree ol, 
#sidebarMenu ul, #sidebarMenu ol {
    list-style: none;
    padding-left: 0;
    margin: 0;
}

.app-toc {
    display: flex;
    flex-direction: column;
    gap: 14px;
    padding: 14px 0 24px;
}

.app-toc-section {
    padding: 0 16px;
}

.app-toc-section + .app-toc-section {
    padding-top: 18px;
    border-top: 1px solid color-mix(in srgb, var(--c-toc-panel-border) 90%, transparent);
}

.app-toc-nav,
.app-toc-section-body {
    margin-top: 0;
}

.toc-tree > ul,
.app-toc-section-body > ul,
.app-toc-section-body > ol {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.toc-tree li,
.app-toc-section-body li {
    position: relative;
    margin: 0;
}

#sidebarMenu .toc-tree a,
#sidebarMenu .app-toc-section-body a,
.list-group-item {
    display: block;
    position: relative;
    margin: 0;
    padding: 12px 16px 12px 32px;
    font-family: var(--font-sans);
    font-size: 0.96rem;
    line-height: 1.48;
    letter-spacing: 0.01em;
    color: var(--c-toc-text);
    background-color: transparent;
    border: none;
    border-radius: 14px;
    text-decoration: none;
    white-space: normal;
    word-break: break-word;
    overflow-wrap: anywhere;
    touch-action: manipulation;
    transition: background-color 0.22s ease, color 0.22s ease, transform 0.22s ease, box-shadow 0.22s ease;
}

#sidebarMenu .toc-tree a:hover,
#sidebarMenu .app-toc-section-body a:hover,
.list-group-item:hover,
.list-group-item-action:hover {
    background-color: var(--c-toc-hover-bg);
    color: var(--c-toc-text-strong);
    transform: translateX(1.5px);
}

#sidebarMenu .toc-tree a:focus-visible,
#sidebarMenu .app-toc-section-body a:focus-visible,
.list-group-item:focus-visible {
    outline: 2px solid color-mix(in srgb, var(--c-toc-active-border) 78%, transparent);
    outline-offset: 2px;
}

#sidebarMenu .active > a,
#sidebarMenu .toc-tree a.is-active,
#sidebarMenu .app-toc-section-body a.is-active,
.list-group-item.active {
    color: var(--c-toc-text-strong);
    background: var(--c-toc-active-bg);
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--c-toc-active-border) 22%, transparent);
}

#sidebarMenu .active > a::before,
#sidebarMenu .toc-tree a.is-active::before,
#sidebarMenu .app-toc-section-body a.is-active::before,
.list-group-item.active::before {
    content: '';
    position: absolute;
    left: 14px;
    top: 11px;
    bottom: 11px;
    width: 2px;
    background: var(--c-toc-active-border);
    border-radius: 999px;
}

.toc-tree li.is-active-trail > a,
.app-toc-section-body li.is-active-trail > a {
    color: color-mix(in srgb, var(--c-toc-text-strong) 86%, var(--c-toc-text));
}

.toc-tree ul ul,
.app-toc-section-body ul ul,
.app-toc-section-body ol ol,
.app-toc-section-body ul ol,
.app-toc-section-body ol ul {
    margin-top: 4px;
    margin-left: 8px;
    padding-left: 18px;
    border-left: 1px solid var(--c-toc-nested-line);
}

.toc-tree ul ul a,
.app-toc-section-body ul ul a,
.app-toc-section-body ol ol a,
.list-group-item .ms-4 {
    padding-top: 10px;
    padding-bottom: 10px;
    padding-left: 28px;
    font-size: 0.9rem;
    border-radius: 12px;
}

.app-sidebar-content::-webkit-scrollbar { width: 6px; }
.app-sidebar-content::-webkit-scrollbar-thumb { background-color: color-mix(in srgb, var(--c-toc-text) 22%, transparent); border-radius: 999px; }
[data-theme="dark"] .app-sidebar-content::-webkit-scrollbar-thumb { background-color: color-mix(in srgb, var(--c-toc-text) 28%, transparent); }

/* 08-modules.css */
/* =========================================
 *  7. MODULES
 * ========================================= */
.lightbox-modal {
    display: none; position: fixed; z-index: 10000; 
    left: 0; top: 0; width: 100vw; height: 100vh; overflow: hidden; 
    background-color: rgba(0,0,0,0.95); opacity: 0; transition: opacity 0.3s ease;
    flex-direction: column; justify-content: center;
    align-items: center; text-align: center; 
}
.lightbox-content {
    display: block; position: relative; margin: 0 auto; 
    padding: 0; max-width: 90vw; max-height: 80vh; 
    width: auto; height: auto; object-fit: contain;
    box-shadow: 0 0 20px rgba(0,0,0,0.5); border-radius: 4px;
    transform: scale(0.95); transition: transform 0.3s; z-index: 10001; 
}
.lightbox-caption {
    display: block; position: relative;
    margin-top: 15px; margin-bottom: 0;
    padding: 0 20px; width: 100%; color: #f1f1f1; 
    font-size: 1rem; line-height: 1.5;
    text-align: center; font-family: var(--font-sans);
    font-weight: normal; z-index: 10001;
    text-shadow: 0 1px 3px rgba(0,0,0,0.8);
}
.lightbox-close {
    position: absolute; top: max(20px, env(safe-area-inset-top)); 
    right: max(20px, env(safe-area-inset-right)); width: 50px; height: 50px;
    background: rgba(0, 0, 0, 0.4); border: 2px solid rgba(255,255,255,0.2);
    border-radius: 50%; cursor: pointer; z-index: 10002; 
    display: flex; justify-content: center; align-items: center;
    transition: all 0.2s; backdrop-filter: blur(5px);
}
.lightbox-close::before, .lightbox-close::after {
    content: ''; position: absolute; width: 24px; height: 2px;
    background-color: white; border-radius: 2px;
}
.lightbox-close::before { transform: rotate(45deg); }
.lightbox-close::after { transform: rotate(-45deg); }
.lightbox-close:hover { background: rgba(255, 255, 255, 0.1); transform: scale(1.1); }

#reading-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    z-index: 10001;
    background: #007bff;
    transition: width 0.1s linear, background-color 0.4s ease, box-shadow 0.4s ease;
}
#reading-progress-bar.is-reconciling { transition: width 0.24s cubic-bezier(0.22, 1, 0.36, 1), background-color 0.4s ease, box-shadow 0.4s ease; }
.progress-complete { background-color: #2eb872; box-shadow: 0 0 10px rgba(46, 184, 114, 0.6); }

#back-to-top {
    position: fixed;
    right: 24px;
    bottom: 24px;
    width: 44px;
    height: 44px;
    z-index: 9990;
    border-radius: 50%;
    border: 0.5px solid var(--c-border); 
    background-color: var(--c-nav-bg); 
    color: var(--c-text);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    backdrop-filter: saturate(180%) blur(20px);
    box-shadow: var(--c-shadow-glass);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1), background-color 0.3s ease;
}
#back-to-top i { color: var(--c-text); }
#back-to-top:hover {
    transform: translateY(-5px); 
    background-color: var(--c-nav-bg); 
    box-shadow: 0 8px 24px rgba(0,0,0,0.15), var(--c-shadow-glass);
}

.callout {
    position: relative;
    margin: 2rem 0;
    padding: 1.35rem 1.5rem;
    border: 1px solid var(--c-border);
    border-radius: 18px;
    background: color-mix(in srgb, var(--c-bg-soft) 88%, var(--c-bg-card));
    box-shadow: inset 0 1px 0 var(--c-border-highlight);
    color: var(--c-text);
}

.callout-info {
    border-color: color-mix(in srgb, var(--c-primary) 28%, var(--c-border));
    background: color-mix(in srgb, var(--c-primary) 8%, var(--c-bg-soft));
}

.callout-warning {
    border-color: color-mix(in srgb, oklch(68% 0.12 78) 38%, var(--c-border));
    background: color-mix(in srgb, oklch(88% 0.08 82) 16%, var(--c-bg-soft));
}

.callout-quote {
    background: var(--c-bg-soft);
    font-family: var(--font-serif);
    font-style: italic;
}

/* 09-list-pages.css */
/* =========================================
 *  8. 列表页组件样式 (首页, 博客, 书籍)
 * ========================================= */
body.home-page {
    background-color: var(--c-bg-body);
    color: var(--c-text);
    transition: background-color 0.3s ease, color 0.3s ease;
    -webkit-font-smoothing: antialiased;
}

.home-layout-wrapper {
    display: flex;
    flex-direction: column;
    max-width: 720px;
    min-height: 100vh;
    margin: 0 auto;
    padding: 4rem 1.5rem 5rem;
}

.home-header-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: clamp(3.25rem, 8vw, 5rem);
}

.home-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-serif);
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.home-brand-link,
.home-brand-link:hover {
    color: var(--c-text);
    text-decoration: none;
}

.home-brand span.dot {
    color: var(--c-primary);
    font-size: 1.8rem;
    line-height: 1;
    user-select: none;
}

.home-page #theme-toggle-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    padding: 0;
    border: 1px solid var(--c-border);
    border-radius: 50%;
    outline: none;
    background: var(--c-bg-card);
    cursor: pointer;
    transition: all 0.2s ease;
}

.home-page #theme-toggle-btn:hover {
    background: var(--c-bg-soft);
    transform: translateY(-1px);
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
}

.home-footer {
    margin-top: auto;
    padding-top: 4rem;
    text-align: center;
    opacity: 0.8;
}

.home-footer p {
    margin: 0;
    color: var(--c-text-muted);
    font-family: var(--font-sans);
    font-size: 0.85rem;
}

.home-hero {
    margin-bottom: 2.25rem;
    padding-bottom: 0;
    border: 0;
    box-shadow: none;
    background-image: none;
}
.home-hero-title {
    font-family: var(--font-sans);
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}
.home-hero-subtitle {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    color: var(--c-text-muted);
    font-style: italic;
    letter-spacing: 0.5px;
}

.post-list {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    border: 0;
    box-shadow: none;
    background-image: none;
}

.post-item {
    position: relative;
    opacity: 1;
    padding: 1.45rem 0 1.55rem;
    border: 0;
    box-shadow: none;
    background-image: none;
}

.post-meta {
    font-family: var(--font-sans);
    font-size: 0.78rem;
    color: var(--c-text-muted);
    margin-bottom: 0.45rem;
    display: flex;
    align-items: center;
    gap: 12px;
    letter-spacing: 0.015em;
}

.post-meta time {
    display: flex;
    align-items: center;
    gap: 8px;
}

.post-date-icon {
    position: relative;
    top: -1px;
    flex: 0 0 auto;
    opacity: 0.72;
}

.post-title {
    font-family: var(--font-sans);
    font-size: clamp(1.25rem, 1rem + 1.1vw, 1.48rem);
    line-height: 1.34;
    margin-bottom: 0.55rem;
    transition: color 0.3s ease;
}

.post-title a {
    color: var(--c-text);
    text-decoration: none;
    position: relative;
    display: inline-block;
}

.post-title a:hover {
    color: var(--c-primary);
}

.home-page .home-hero::before,
.home-page .home-hero::after,
.home-page .post-list::before,
.home-page .post-list::after,
.home-page .post-item::before,
.home-page .post-item::after,
.home-page .post-title a::before,
.home-page .post-title a::after {
    content: none;
    display: none;
    border: 0;
    box-shadow: none;
    background: none;
}

.post-excerpt {
    font-family: var(--font-serif);
    font-size: 1rem;
    line-height: 1.62;
    color: var(--c-text-muted);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* 分页导航设计 */
.home-pagination {
    display: grid;
    grid-template-columns: minmax(44px, 1fr) auto minmax(44px, 1fr);
    align-items: center;
    gap: 1rem;
    margin-top: 4rem;
    font-family: var(--font-sans);
    width: min(100%, 420px);
    margin-inline: auto;
}

.home-pagination > :first-child {
    justify-self: end;
}

.home-pagination > :last-child {
    justify-self: start;
}

.pagination-arrow-btn {
    inline-size: 46px;
    block-size: 46px;
    display: inline-grid;
    place-items: center;
    border-radius: 50%;
    background: var(--c-bg-soft);
    border: 1px solid var(--c-border);
    color: var(--c-text);
    text-decoration: none;
    transition: transform 0.22s ease, background-color 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease, color 0.22s ease;
    box-shadow: inset 0 1px 0 var(--c-border-highlight);
}

.pagination-arrow-btn svg {
    display: block;
}

.pagination-arrow-btn:hover {
    color: var(--c-primary);
    background: var(--c-bg-card);
    border-color: rgba(0, 102, 204, 0.2);
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: 0 10px 18px rgba(0,0,0,0.08);
}

.pagination-arrow-btn.disabled {
    opacity: 0.34;
    pointer-events: none;
}

.pagination-info {
    min-width: 112px;
    height: 46px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 0 16px;
    border-radius: 999px;
    background: linear-gradient(180deg, rgba(255,255,255,0.58), rgba(255,255,255,0.16));
    border: 1px solid var(--c-border);
    color: var(--c-text);
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.02em;
    box-shadow: inset 0 1px 0 var(--c-border-highlight);
}

[data-theme="dark"] .pagination-arrow-btn {
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.06);
}

[data-theme="dark"] .pagination-info {
    background: linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.03));
}

.page-current,
.page-total,
.page-slash {
    display: inline-block;
    line-height: 1;
}

.page-current,
.page-total {
    font-size: 1rem;
}

.page-slash {
    font-size: 0.96rem;
    color: var(--c-text-muted);
}

/* 动画定义 */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 576px) {
    .home-layout-wrapper {
        padding: 2rem 1.25rem 3rem;
    }

    .home-hero {
        padding-bottom: 0;
        border: 0;
        box-shadow: none;
        background-image: none;
    }

    .post-list {
        border: 0;
        box-shadow: none;
        background-image: none;
    }

    .post-item {
        padding: 1.25rem 0 1.35rem;
        border: 0;
        box-shadow: none;
        background-image: none;
    }

    .post-title { font-size: 1.26rem; }
    .post-excerpt { font-size: 0.98rem; }
    .home-pagination {
        width: min(100%, 320px);
        gap: 0.75rem;
    }

    .pagination-info {
        min-width: 98px;
        padding: 0 12px;
    }
}

@media (max-width: 991.98px) {
    .app-toc {
        gap: 12px;
        padding-top: 10px;
    }

    .app-toc-section {
        padding-left: 16px;
        padding-right: 16px;
    }

    #sidebarMenu .toc-tree a,
    #sidebarMenu .app-toc-section-body a {
        padding: 13px 16px 13px 30px;
        font-size: 0.98rem;
    }
}

@media (max-width: 767.98px) {
    .toc-tree ul ul,
    .app-toc-section-body ul ul,
    .app-toc-section-body ol ol,
    .app-toc-section-body ul ol,
    .app-toc-section-body ol ul {
        padding-left: 16px;
    }
}

/* 10-media.css */
/* Image Captions */
.article-body figcaption, .article-body .image-caption {
    display: block;
    text-align: center;
    font-size: 0.85em;
    color: var(--c-text-muted);
    margin-top: 0.75rem;
    letter-spacing: 0.02em;
}

.article-body pre { overflow-x: auto; max-width: 100%; white-space: pre; padding: 16px; background-color: var(--c-bg-soft); border-radius: 8px; font-size: 0.9em; }
.article-body code { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; background-color: var(--c-bg-soft); padding: 0.2em 0.4em; border-radius: 4px; font-size: 0.85em; color: var(--c-code-text); }
.article-body pre code { padding: 0; background: transparent; font-size: inherit; }

html.font-scale-transition .article-body,
html.font-scale-transition .article-body .page-title,
html.font-scale-transition .article-body h1,
html.font-scale-transition .article-body h2,
html.font-scale-transition .article-body h3,
html.font-scale-transition .article-body h4 {
    transition: none !important;
}

/* 11-motion.css */
/* =========================================
 *  8. SVG & MICRO-ANIMATIONS
 * ========================================= */
.icon-theme-morph {
    overflow: visible;
}

.icon-theme-morph * {
    transform-box: fill-box;
    transform-origin: center;
}

.icon-theme-morph .sun-rays {
    opacity: 0;
    transform: rotate(-90deg) scale(0.4);
    transform-origin: 12px 12px;
    transition: transform 0.52s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.32s ease;
}

.icon-theme-morph .theme-center {
    transition: all 0.52s cubic-bezier(0.22, 1, 0.36, 1);
}

.icon-theme-morph .moon-hole {
    transition: all 0.52s cubic-bezier(0.22, 1, 0.36, 1);
}

.theme-toggle:hover .icon-theme-morph .sun-rays {
    transform: rotate(-62deg) scale(0.55);
    opacity: 0.15;
}

.theme-toggle:hover .icon-theme-morph .theme-center {
    transform: scale(1.03);
}

[data-theme='dark'] .icon-theme-morph .sun-rays {
    opacity: 1;
    transform: rotate(0) scale(1);
}

[data-theme='dark'] .icon-theme-morph .theme-center {
    r: 5;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.5;
}

[data-theme='dark'] .icon-theme-morph .moon-hole {
    cx: 24;
    cy: 0;
    r: 0;
}

.theme-toggle.is-animating .icon-theme-morph {
    animation: theme-icon-drift 0.58s cubic-bezier(0.22, 1, 0.36, 1);
}

.icon-hamburger .line-top, .icon-hamburger .line-mid, .icon-hamburger .line-bot {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); transform-origin: 12px 12px;
}
.sidebar-open .icon-hamburger .line-top { transform: translateY(6px) rotate(45deg); }
.sidebar-open .icon-hamburger .line-mid { opacity: 0; }
.sidebar-open .icon-hamburger .line-bot { transform: translateY(-6px) rotate(-45deg); }

@keyframes theme-icon-drift {
    0% { transform: rotate(0deg) scale(1); }
    35% { transform: rotate(-8deg) scale(0.96); }
    70% { transform: rotate(6deg) scale(1.02); }
    100% { transform: rotate(0deg) scale(1); }
}

@keyframes font-control-ring {
    0% {
        opacity: 0;
        transform: scale(0.72);
    }
    35% {
        opacity: 0.72;
    }
    100% {
        opacity: 0;
        transform: scale(1.22);
    }
}


/* =========================================
 *  9. VIEW TRANSITIONS
 * ========================================= */
@view-transition {
    navigation: auto;
}

:root {
    --vt-root-duration: 0.16s;
    --vt-title-duration: 0.34s;
    --vt-title-easing: cubic-bezier(0.22, 1, 0.36, 1);
    --vt-root-easing: cubic-bezier(0.3, 0, 0.15, 1);
    --vt-post-stage-duration: 0.42s;
    --vt-post-title-duration: 0.48s;
    --vt-post-stage-easing: cubic-bezier(0.2, 0.9, 0.22, 1);
    --vt-post-title-easing: cubic-bezier(0.18, 1, 0.32, 1);
    --theme-toggle-x: 50%;
    --theme-toggle-y: 0px;
}

.touch-device {
    --vt-root-duration: 0.12s;
    --vt-title-duration: 0.24s;
    --vt-post-stage-duration: 0.34s;
    --vt-post-title-duration: 0.38s;
}

.ios-webkit {
    --vt-root-duration: 0.09s;
    --vt-title-duration: 0.18s;
    --vt-post-stage-duration: 0.28s;
    --vt-post-title-duration: 0.32s;
}

@media (max-width: 767.98px) {
    :root {
        --vt-root-duration: 0.1s;
        --vt-title-duration: 0.22s;
        --vt-post-stage-duration: 0.3s;
        --vt-post-title-duration: 0.34s;
    }
}

@media (prefers-reduced-motion: no-preference) {
    /* Keep the page transition light so the title morph remains the star. */
    ::view-transition-group(*) {
        animation-duration: var(--vt-title-duration);
        animation-timing-function: var(--vt-title-easing);
    }

    ::view-transition-old(*),
    ::view-transition-new(*) {
        animation-duration: var(--vt-title-duration);
        animation-timing-function: var(--vt-title-easing);
    }

    ::view-transition-old(root),
    ::view-transition-new(root) {
        animation-duration: var(--vt-root-duration);
        animation-timing-function: var(--vt-root-easing);
    }

    ::view-transition-old(root) {
        animation-name: vt-root-fade-out;
    }

    ::view-transition-new(root) {
        animation-name: vt-root-fade-in;
    }

    html[data-vt-kind="post-open"]::view-transition-group(post-stage),
    html[data-vt-kind="post-return"]::view-transition-group(post-stage) {
        animation-duration: var(--vt-post-stage-duration);
        animation-timing-function: var(--vt-post-stage-easing);
    }

    html[data-vt-kind="post-open"]::view-transition-group(post-title),
    html[data-vt-kind="post-return"]::view-transition-group(post-title) {
        animation-duration: var(--vt-post-title-duration);
        animation-timing-function: var(--vt-post-title-easing);
    }

    html[data-vt-kind="post-open"]::view-transition-old(root),
    html[data-vt-kind="post-open"]::view-transition-new(root),
    html[data-vt-kind="post-return"]::view-transition-old(root),
    html[data-vt-kind="post-return"]::view-transition-new(root) {
        animation-duration: var(--vt-root-duration);
        animation-timing-function: var(--vt-root-easing);
        mix-blend-mode: normal;
    }

    html[data-vt-kind="post-open"]::view-transition-old(root),
    html[data-vt-kind="post-return"]::view-transition-old(root) {
        animation-name: vt-root-fade-out;
    }

    html[data-vt-kind="post-open"]::view-transition-new(root),
    html[data-vt-kind="post-return"]::view-transition-new(root) {
        animation-name: vt-root-fade-in;
    }

    html[data-vt-kind="post-open"]::view-transition-old(post-stage),
    html[data-vt-kind="post-open"]::view-transition-new(post-stage),
    html[data-vt-kind="post-return"]::view-transition-old(post-stage),
    html[data-vt-kind="post-return"]::view-transition-new(post-stage) {
        animation-duration: var(--vt-post-stage-duration);
        animation-timing-function: var(--vt-post-stage-easing);
        mix-blend-mode: normal;
    }

    html[data-vt-kind="post-open"]::view-transition-old(post-stage) {
        animation-name: post-stage-open-old-out;
    }

    html[data-vt-kind="post-open"]::view-transition-new(post-stage) {
        animation-name: post-stage-open-new-in;
    }

    html[data-vt-kind="post-return"]::view-transition-old(post-stage) {
        animation-name: post-stage-return-old-out;
    }

    html[data-vt-kind="post-return"]::view-transition-new(post-stage) {
        animation-name: post-stage-return-new-in;
    }

    html[data-vt-kind="post-open"]::view-transition-old(post-title),
    html[data-vt-kind="post-open"]::view-transition-new(post-title),
    html[data-vt-kind="post-return"]::view-transition-old(post-title),
    html[data-vt-kind="post-return"]::view-transition-new(post-title) {
        animation-duration: var(--vt-post-title-duration);
        animation-timing-function: var(--vt-post-title-easing);
        transform-origin: 50% 0%;
        mix-blend-mode: normal;
    }

    html[data-vt-kind="post-open"]::view-transition-old(post-title) {
        animation-name: post-title-open-old-out;
    }

    html[data-vt-kind="post-open"]::view-transition-new(post-title) {
        animation-name: post-title-open-new-in;
    }

    html[data-vt-kind="post-return"]::view-transition-old(post-title) {
        animation-name: post-title-return-old-out;
    }

    html[data-vt-kind="post-return"]::view-transition-new(post-title) {
        animation-name: post-title-return-new-in;
    }

    ::view-transition-group(page-feed),
    ::view-transition-group(page-shell),
    ::view-transition-group(page-counter),
    ::view-transition-group(lang-switch-control) {
        animation-duration: 0.24s;
        animation-timing-function: var(--vt-title-easing);
    }

    html.theme-transitioning::view-transition-old(root),
    html.theme-transitioning::view-transition-new(root) {
        animation-duration: 0.46s;
        animation-timing-function: cubic-bezier(0.22, 1, 0.36, 1);
        mix-blend-mode: normal;
    }

    html.theme-transitioning::view-transition-old(root) {
        animation-name: theme-root-fade-out;
    }

    html.theme-transitioning::view-transition-new(root) {
        animation-name: theme-root-reveal;
    }

    html.font-scale-transition::view-transition-group(root),
    html.font-scale-transition::view-transition-old(root),
    html.font-scale-transition::view-transition-new(root) {
        animation: none;
    }

    html.font-scale-transition::view-transition-group(reader-content) {
        animation-duration: 0.24s;
        animation-timing-function: cubic-bezier(0.22, 1, 0.36, 1);
    }

    html.font-scale-transition::view-transition-old(reader-content),
    html.font-scale-transition::view-transition-new(reader-content) {
        animation-duration: 0.24s;
        animation-timing-function: cubic-bezier(0.22, 1, 0.36, 1);
        transform-origin: var(--font-scale-origin-x) var(--font-scale-origin-y);
        mix-blend-mode: normal;
    }

    html.font-scale-transition::view-transition-old(reader-content) {
        animation-name: reader-font-old-out;
    }

    html.font-scale-transition::view-transition-new(reader-content) {
        animation-name: reader-font-new-in;
    }

    html.lang-hybrid-transition::view-transition-group(root),
    html.lang-hybrid-transition::view-transition-old(root),
    html.lang-hybrid-transition::view-transition-new(root) {
        animation: none;
    }

    html.lang-hybrid-transition::view-transition-group(lang-page-content),
    html.lang-hybrid-transition::view-transition-group(lang-sidebar-content),
    html.lang-hybrid-transition::view-transition-group(lang-switch-control) {
        animation-timing-function: cubic-bezier(0.22, 1, 0.36, 1);
    }

    html.lang-hybrid-transition::view-transition-group(lang-page-content) {
        animation-duration: 0.34s;
    }

    html.lang-hybrid-transition::view-transition-old(lang-page-content),
    html.lang-hybrid-transition::view-transition-new(lang-page-content) {
        animation-duration: 0.34s;
        animation-timing-function: cubic-bezier(0.22, 1, 0.36, 1);
        mix-blend-mode: normal;
    }

    html.lang-hybrid-transition::view-transition-old(lang-page-content) {
        animation-name: lang-page-old-out;
    }

    html.lang-hybrid-transition::view-transition-new(lang-page-content) {
        animation-name: lang-page-new-in;
    }

    html.lang-hybrid-transition::view-transition-group(lang-sidebar-content) {
        animation-duration: 0.26s;
    }

    html.lang-hybrid-transition::view-transition-old(lang-sidebar-content),
    html.lang-hybrid-transition::view-transition-new(lang-sidebar-content) {
        animation-duration: 0.26s;
        animation-timing-function: cubic-bezier(0.22, 1, 0.36, 1);
        mix-blend-mode: normal;
    }

    html.lang-hybrid-transition::view-transition-old(lang-sidebar-content) {
        animation-name: lang-sidebar-old-out;
    }

    html.lang-hybrid-transition::view-transition-new(lang-sidebar-content) {
        animation-name: lang-sidebar-new-in;
    }

    html.lang-hybrid-transition::view-transition-group(lang-switch-control) {
        animation-duration: 0.22s;
    }

    html.lang-hybrid-transition::view-transition-old(lang-switch-control),
    html.lang-hybrid-transition::view-transition-new(lang-switch-control) {
        animation-duration: 0.22s;
        animation-timing-function: cubic-bezier(0.22, 1, 0.36, 1);
        mix-blend-mode: normal;
    }

    html.lang-hybrid-transition::view-transition-old(lang-switch-control) {
        animation-name: lang-button-old-out;
    }

    html.lang-hybrid-transition::view-transition-new(lang-switch-control) {
        animation-name: lang-button-new-in;
    }
}

@keyframes vt-root-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes vt-root-fade-out {
    from { opacity: 1; }
    to { opacity: 0.92; }
}

@keyframes post-stage-open-old-out {
    from { opacity: 1; filter: blur(0); transform: translate3d(0, 0, 0) scale(1); }
    to { opacity: 0; filter: blur(6px); transform: translate3d(0, 18px, 0) scale(1); }
}

@keyframes post-stage-open-new-in {
    from { opacity: 0; filter: blur(8px); transform: translate3d(0, 18px, 0) scale(1); }
    to { opacity: 1; filter: blur(0); transform: translate3d(0, 0, 0) scale(1); }
}

@keyframes post-stage-return-old-out {
    from { opacity: 1; filter: blur(0); transform: translate3d(0, 0, 0) scale(1); }
    to { opacity: 0; filter: blur(7px); transform: translate3d(0, -16px, 0) scale(1); }
}

@keyframes post-stage-return-new-in {
    from { opacity: 0; filter: blur(7px); transform: translate3d(0, -14px, 0) scale(1); }
    to { opacity: 1; filter: blur(0); transform: translate3d(0, 0, 0) scale(1); }
}

@keyframes post-title-open-old-out {
    from { opacity: 1; filter: blur(0); transform: translate3d(0, 0, 0) scale(1); }
    to { opacity: 0; filter: blur(4px); transform: translate3d(0, -10px, 0) scale(1); }
}

@keyframes post-title-open-new-in {
    from { opacity: 0; filter: blur(4px); transform: translate3d(0, 12px, 0) scale(1); }
    to { opacity: 1; filter: blur(0); transform: translate3d(0, 0, 0) scale(1); }
}

@keyframes post-title-return-old-out {
    from { opacity: 1; filter: blur(0); transform: translate3d(0, 0, 0) scale(1); }
    to { opacity: 0; filter: blur(4px); transform: translate3d(0, 10px, 0) scale(1); }
}

@keyframes post-title-return-new-in {
    from { opacity: 0; filter: blur(4px); transform: translate3d(0, -10px, 0) scale(1); }
    to { opacity: 1; filter: blur(0); transform: translate3d(0, 0, 0) scale(1); }
}

@keyframes lang-page-old-out {
    from { opacity: 1; filter: blur(0); transform: translate3d(0, 0, 0) scale(1); }
    to { opacity: 0; filter: blur(6px); transform: translate3d(0, -8px, 0) scale(0.989); }
}

@keyframes lang-page-new-in {
    from { opacity: 0; filter: blur(7px); transform: translate3d(0, 8px, 0) scale(1.009); }
    to { opacity: 1; filter: blur(0); transform: translate3d(0, 0, 0) scale(1); }
}

@keyframes lang-sidebar-old-out {
    from { opacity: 1; filter: blur(0); transform: translate3d(0, 0, 0); }
    to { opacity: 0; filter: blur(4px); transform: translate3d(-8px, 0, 0); }
}

@keyframes lang-sidebar-new-in {
    from { opacity: 0; filter: blur(4px); transform: translate3d(8px, 0, 0); }
    to { opacity: 1; filter: blur(0); transform: translate3d(0, 0, 0); }
}

@keyframes lang-button-old-out {
    from { opacity: 1; transform: scale(1) rotate(0deg); }
    to { opacity: 0; transform: scale(0.94) rotate(-4deg); }
}

@keyframes lang-button-new-in {
    from { opacity: 0; transform: scale(1.05) rotate(4deg); }
    to { opacity: 1; transform: scale(1) rotate(0deg); }
}

@keyframes theme-root-fade-out {
    from {
        opacity: 1;
        filter: saturate(1);
    }
    to {
        opacity: 0.94;
        filter: saturate(1.03);
    }
}

@keyframes theme-root-reveal {
    from {
        opacity: 0.96;
        clip-path: circle(12px at var(--theme-toggle-x) var(--theme-toggle-y));
        filter: saturate(1.03);
    }
    to {
        opacity: 1;
        clip-path: circle(150vmax at var(--theme-toggle-x) var(--theme-toggle-y));
        filter: saturate(1);
    }
}

@keyframes reader-font-old-out {
    from {
        transform: scale(1);
        opacity: 1;
    }
    to {
        transform: scale(var(--font-scale-old-exit-scale));
        opacity: 0;
    }
}

@keyframes reader-font-new-in {
    from {
        transform: scale(var(--font-scale-from));
        opacity: 0.72;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

/* 禁用状态：当没有翻译页面时 */
.lang-capsule-btn.disabled-lang {
    opacity: 0.56;
    cursor: not-allowed;
    border-style: solid;
    background: color-mix(in srgb, var(--c-nav-bg) 86%, transparent);
    color: var(--c-text-muted);
    box-shadow: inset 0 1px 0 var(--c-glass-border-top);
}
.lang-capsule-btn.disabled-lang:hover {
    background: color-mix(in srgb, var(--c-nav-bg) 86%, transparent);
    border-color: var(--c-border);
    box-shadow: inset 0 1px 0 var(--c-glass-border-top);
    transform: none;
    cursor: not-allowed;
}

/* Dark mode code blocks depth */
[data-theme="dark"] .article-body pre {
    border: 1px solid rgba(255, 255, 255, 0.08);
    background-color: var(--c-bg-soft);
}

  /* ==== Fluid Layout (Module 2) ==== */
  .app-body {
      display: flex;
      flex: 1;
      width: 100%;
  }
  .app-main {
      flex: 1;
      min-width: 0;
      padding: 32px 16px;
  }
  .app-sidebar {
      width: 270px;
      flex-shrink: 0;
      background-color: var(--c-sidebar-bg);
      -webkit-backdrop-filter: saturate(180%) blur(20px);
      backdrop-filter: saturate(180%) blur(20px);
  }

  @media (min-width: 992px) {
      .app-sidebar {
          border: 1px solid var(--c-toc-panel-border);
          border-radius: 24px;
          background: var(--c-toc-panel-bg);
          box-shadow: var(--c-toc-panel-shadow);
          -webkit-backdrop-filter: saturate(155%) blur(18px);
          backdrop-filter: saturate(155%) blur(18px);
      }

      .app-sidebar-header {
          display: flex;
      }

      .sidebar-close-btn {
          display: none;
      }

      .app-sidebar-content {
          padding: 10px 0 14px;
      }
  }

  /* Desktop Grid Layout with editorial TOC rail */
  @media (min-width: 1200px) {
      .app-body.has-toc-panel {
          display: grid;
          grid-template-columns: minmax(268px, 304px) minmax(0, 75ch) minmax(24px, 1fr);
          gap: clamp(40px, 4vw, 72px);
          align-items: start;
          max-width: min(1540px, calc(100vw - 56px));
          margin: 0 auto;
          padding: 0 24px;
      }

      .app-body.no-toc-panel {
          display: grid;
          grid-template-columns: minmax(24px, 1fr) minmax(0, 75ch) minmax(24px, 1fr);
          gap: 0;
          align-items: start;
          max-width: min(1400px, calc(100vw - 56px));
          margin: 0 auto;
          padding: 0 24px;
      }

      .app-body.has-toc-panel .app-main,
      .app-body.no-toc-panel .app-main {
          grid-column: 2;
          padding: 64px 0;
      }

      .app-body.has-toc-panel .app-sidebar {
          grid-column: 1;
          justify-self: end;
          width: clamp(268px, 22vw, 304px);
          position: sticky;
          top: calc(var(--navbar-height) + 28px);
          height: auto;
          max-height: calc(100vh - 108px);
          text-align: left;
      }

      .app-body.has-toc-panel .app-toc-section {
          padding-left: 16px;
          padding-right: 16px;
      }
  }

  /* Large Tablet Layout */
  @media (min-width: 992px) and (max-width: 1199.98px) {
      .app-body.has-toc-panel {
          display: flex;
          align-items: flex-start;
          justify-content: center;
          gap: 32px;
          max-width: min(1320px, calc(100vw - 40px));
          margin: 0 auto;
          padding: 0 20px;
      }

      .app-body.no-toc-panel {
          display: flex;
          justify-content: center;
          max-width: min(980px, calc(100vw - 40px));
          margin: 0 auto;
          padding: 0 20px;
      }

      .app-body.has-toc-panel .app-main,
      .app-body.no-toc-panel .app-main {
          flex: 1 1 auto;
          max-width: clamp(65ch, 100%, 75ch);
          padding: 56px 0;
      }

      .app-body.has-toc-panel .app-sidebar {
          width: 248px;
          position: sticky;
          top: calc(var(--navbar-height) + 24px);
          height: auto;
          max-height: calc(100vh - 104px);
      }
  }

/* 12-overrides.css */
/* ================================================================
   SMART IMMERSIVE READING MODE (Invisible UX)
   ================================================================ */
.app-header {
    transition: transform 0.4s cubic-bezier(0.32, 1.05, 0.45, 1), background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.touch-device .app-header,
.touch-device .app-sidebar {
    -webkit-backdrop-filter: saturate(150%) blur(14px);
    backdrop-filter: saturate(150%) blur(14px);
}

.ios-webkit .app-header,
.ios-webkit .app-sidebar {
    box-shadow: 0 6px 22px rgba(0,0,0,0.08);
}

html.sidebar-locked,
html.sidebar-locked body {
    overscroll-behavior: none;
}

body.sidebar-open .app-header {
    transform: none;
}

body.sidebar-open #back-to-top {
    opacity: 0 !important;
    pointer-events: none !important;
}

body.sidebar-ui-static .app-header,
body.sidebar-ui-static #back-to-top,
body.sidebar-ui-static .icon-hamburger .line-top,
body.sidebar-ui-static .icon-hamburger .line-mid,
body.sidebar-ui-static .icon-hamburger .line-bot {
    transition: none !important;
}

#back-to-top {
    transition: transform 0.4s cubic-bezier(0.32, 1.05, 0.45, 1), opacity 0.3s ease, background-color 0.2s ease;
}

/* Hide Top Nav naturally */
body.reading-mode .app-header {
    transform: translateY(-100%);
}

/* Hide Back-to-Top naturally */
body.reading-mode #back-to-top.show {
    transform: translateY(150%) !important;
}

/* Revamp Back to Top to use classes instead of inline display */
#back-to-top {
    display: flex; /* Managed by alpha/transform now */
    opacity: 0;
    pointer-events: none;
    transform: translateY(20px);
}

#back-to-top.show {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

/* Controls Container for flexible nav items */
.user-controls-container { display: flex; align-items: center; gap: 1rem; }
/* Tighten the snapshot box to the title itself instead of the whole row. */
.post-title {
    display: inline-block;
    max-width: 100%;
}

@media (max-width: 767.98px) {
    :root {
        --mobile-reader-max-width: 38rem;
    }

    .app-header-left,
    .app-header-tools {
        gap: 5px;
    }

    .font-controls-group {
        gap: 5px;
    }

    .font-control-btn {
        width: 42px;
        height: 42px;
    }

    .header-tools-separator {
        display: none;
    }

    .app-header .nav-round-btn:not(.font-control-btn),
    .app-header .lang-capsule-btn,
    .app-header .about-lang-chip,
    .smart-nav-link {
        width: 42px;
        height: 42px;
    }

    .app-header .sidebar-toggle-btn,
    .smart-nav-link[data-return-home-link="true"] {
        background: color-mix(in srgb, var(--c-nav-bg) 82%, transparent);
        border-color: color-mix(in srgb, var(--c-border) 84%, transparent);
        box-shadow: inset 0 1px 0 var(--c-glass-border-top);
    }

    .app-header {
        -webkit-backdrop-filter: saturate(160%) blur(14px);
        backdrop-filter: saturate(160%) blur(14px);
    }

    .app-sidebar {
        -webkit-backdrop-filter: saturate(160%) blur(14px);
        backdrop-filter: saturate(160%) blur(14px);
    }

    .app-main {
        padding: 24px 18px 36px;
        padding-inline: 18px;
    }

    .article-body {
        box-sizing: border-box;
        width: 100%;
        max-width: var(--mobile-reader-max-width);
        margin-left: auto;
        margin-right: auto;
        font-size: clamp(1rem, 0.92rem + 1.2vw, 1.08rem);
        font-size: calc(clamp(1rem, 0.92rem + 1.2vw, 1.08rem) * var(--reader-scale));
        line-height: 1.78;
        text-align: start;
        text-justify: auto;
        letter-spacing: 0.012em;
        word-spacing: 0.02em;
    }

    html:lang(zh-CN) .article-body {
        max-width: min(100%, var(--reader-measure-cjk-mobile));
        text-align: start;
        text-align-last: auto;
        text-justify: auto;
        line-break: loose;
        letter-spacing: 0;
        word-spacing: 0;
    }

    html:lang(zh-CN) .article-body p:not(.page-subtitle) {
        text-align: justify;
        text-align-last: start;
        text-justify: inter-character;
    }

    .article-body p,
    .article-body li {
        margin-bottom: 1.18em;
        text-align: inherit;
        text-align-last: inherit;
        hanging-punctuation: none;
        text-spacing-trim: normal;
        text-autospace: normal;
    }

    .article-body .page-title {
        font-size: clamp(1.9rem, 6vw, 2.45rem);
        font-size: calc(clamp(1.9rem, 6vw, 2.45rem) * var(--reader-scale));
        line-height: 1.18;
        text-align: start;
        text-align-last: start;
    }

    .article-body .page-subtitle {
        margin-bottom: 2rem;
        font-size: calc(1rem * var(--reader-scale));
        line-height: 1.52;
    }

    .article-body h2 {
        margin-top: 2.15em;
        padding-bottom: 0.34em;
        font-size: calc(clamp(1.36rem, 4.8vw, 1.68rem) * var(--reader-scale));
        line-height: 1.28;
        text-align: start;
        text-align-last: start;
    }

    .app-sidebar {
        max-height: min(88vh, calc(100vh - 20px));
        border-radius: 22px 22px 0 0;
    }

    .app-sidebar-header {
        padding: 12px 18px 12px;
    }

    .app-sidebar-content {
        max-height: calc(min(88vh, calc(100vh - 20px)) - 66px);
    }

    #back-to-top {
        bottom: 18px;
        right: 18px;
        width: 44px;
        height: 44px;
    }

    .home-pagination {
        margin-top: 3rem;
    }
}

@media (max-width: 359.98px) {
    .app-header-container {
        padding: 0 8px;
        gap: 8px;
    }

    .app-header-left,
    .app-header-tools {
        gap: 4px;
    }

    .font-controls-group {
        gap: 3px;
    }

    .font-control-btn {
        width: 40px;
        height: 40px;
    }

    .app-header .nav-round-btn:not(.font-control-btn),
    .app-header .lang-capsule-btn,
    .app-header .about-lang-chip,
    .smart-nav-link {
        width: 40px;
        height: 40px;
    }

    .font-scale-label-small {
        font-size: 0.76rem;
    }

    .font-scale-label-large {
        font-size: 0.94rem;
    }
}

html[data-page-direction="next"]::view-transition-old(page-feed) {
    animation: page-feed-slide-out-next 0.34s cubic-bezier(0.22, 1, 0.36, 1) both;
}

html[data-page-direction="next"]::view-transition-new(page-feed) {
    animation: page-feed-slide-in-next 0.34s cubic-bezier(0.22, 1, 0.36, 1) both;
}

html[data-page-direction="prev"]::view-transition-old(page-feed) {
    animation: page-feed-slide-out-prev 0.34s cubic-bezier(0.22, 1, 0.36, 1) both;
}

html[data-page-direction="prev"]::view-transition-new(page-feed) {
    animation: page-feed-slide-in-prev 0.34s cubic-bezier(0.22, 1, 0.36, 1) both;
}

html[data-page-direction]::view-transition-old(page-counter),
html[data-page-direction]::view-transition-new(page-counter) {
    animation-duration: 0.26s;
    animation-timing-function: cubic-bezier(0.22, 1, 0.36, 1);
}

html[data-page-direction]::view-transition-old(page-counter) {
    animation-name: page-counter-fade-out;
}

html[data-page-direction]::view-transition-new(page-counter) {
    animation-name: page-counter-fade-in;
}

html[data-page-direction]::view-transition-old(page-shell),
html[data-page-direction]::view-transition-new(page-shell) {
    animation-duration: 0.24s;
    animation-timing-function: cubic-bezier(0.22, 1, 0.36, 1);
}

html[data-page-direction]::view-transition-old(page-shell) {
    animation-name: page-shell-fade-out;
}

html[data-page-direction]::view-transition-new(page-shell) {
    animation-name: page-shell-fade-in;
}

@keyframes page-feed-slide-out-next {
    from { opacity: 1; transform: translate3d(0, 0, 0); }
    to { opacity: 0; transform: translate3d(-22px, 0, 0); }
}

@keyframes page-feed-slide-in-next {
    from { opacity: 0; transform: translate3d(22px, 0, 0); }
    to { opacity: 1; transform: translate3d(0, 0, 0); }
}

@keyframes page-feed-slide-out-prev {
    from { opacity: 1; transform: translate3d(0, 0, 0); }
    to { opacity: 0; transform: translate3d(22px, 0, 0); }
}

@keyframes page-feed-slide-in-prev {
    from { opacity: 0; transform: translate3d(-22px, 0, 0); }
    to { opacity: 1; transform: translate3d(0, 0, 0); }
}

@keyframes page-counter-fade-out {
    from { opacity: 1; transform: translateY(0); }
    to { opacity: 0; transform: translateY(-4px); }
}

@keyframes page-counter-fade-in {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes page-shell-fade-out {
    from { opacity: 1; }
    to { opacity: 0.84; }
}

@keyframes page-shell-fade-in {
    from { opacity: 0.84; }
    to { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
    .post-item,
    .home-hero,
    .pagination-info,
    .pagination-arrow-btn,
    .article-body,
    .article-body .page-title,
    .article-body h1,
    .article-body h2,
    .article-body h3,
    .article-body h4,
    .article-body p,
    .article-body li,
    .article-body blockquote,
    .article-body figcaption,
    .article-body pre,
    .font-control-btn,
    .font-scale-label {
        animation: none !important;
        transition: none !important;
    }
}