:root {
    color-scheme: light;
    --bg: #fff;
    --surface: #f1f3f4;
    --text: #222;
    --muted: #666;
    --link: #0c4b33;
    --accent: #44b78b;
    --border: #d8d8d8;
    --field-bg: #eef3fb;
    --field-bg-focus: #f5f9ff;
    --field-focus-border: #1a8fff;
    --field-icon: #1a8fff;
    --pagination-primary: #1a8fff;
    --pagination-primary-hover: #0877dc;
    --surface-raised: rgba(255, 255, 255, .82);
    --shadow-soft: 0 18px 45px rgba(15, 23, 42, .08);
    --shadow-hover: 0 24px 60px rgba(15, 23, 42, .13);
    --radius-lg: 22px;
    --radius-md: 16px;
    --page-gutter: clamp(14px, 3vw, 48px);
    --layout-gap: clamp(24px, 4vw, 72px);
    --sidebar-width: clamp(300px, 24vw, 440px);
}
[data-theme="dark"] {
    color-scheme: dark;
    --bg: #070b11;
    --surface: #101721;
    --text: #f1f5f4;
    --muted: #98a6b3;
    --link: #8ce3be;
    --accent: #4fd1a0;
    --border: #263240;
    --field-bg: #101a26;
    --field-bg-focus: #142231;
    --field-focus-border: #55d7a5;
    --field-icon: #65dbad;
    --pagination-primary: #5bd7a7;
    --pagination-primary-hover: #83e6bf;
    --surface-raised: rgba(14, 21, 31, .88);
    --shadow-soft: 0 22px 55px rgba(0, 0, 0, .34);
    --shadow-hover: 0 28px 70px rgba(0, 0, 0, .48);
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.65 system-ui, -apple-system, "Segoe UI", sans-serif; }
a { color: var(--link); text-decoration: none; }
a:hover, a:focus { text-decoration: underline; }
.page-width { width: calc(100% - (var(--page-gutter) * 2)); margin: 0 auto; }
.skip-link { position: absolute; left: -9999px; }
.skip-link:focus { left: 1rem; top: 1rem; z-index: 2; padding: .5rem 1rem; background: var(--bg); }
.site-header { background: var(--bg); color: var(--text); }
.header-inner { width: calc(100% - (var(--page-gutter) * 2)); min-height: 74px; display: flex; gap: 28px; align-items: center; margin: auto; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-size: 1.55rem; font-weight: 700; }
.brand:hover { text-decoration: none; }
.brand-mark { display: grid; place-items: center; width: 39px; height: 39px; border: 3px solid var(--text); border-radius: 50%; font-size: 1.3rem; }
.brand-logo { width: 39px; height: 39px; object-fit: contain; border-radius: 9px; }
.header-tools { display: flex; align-items: center; gap: 28px; }
.search-form { display: flex; align-items: center; width: 300px; max-width: 370px; height: 42px; border: 1px solid transparent; border-radius: 8px; background: var(--field-bg); transition: border-color .15s ease, background-color .15s ease, box-shadow .15s ease; }
.search-form:focus-within { border-color: var(--field-focus-border); background: var(--field-bg-focus); }
.search-form .search-submit { display: grid; place-items: center; align-self: stretch; padding: 0 6px 0 16px; border: 0; background: transparent; color: var(--field-icon); cursor: pointer; }
.search-form .search-submit svg { width: 20px; height: 20px; }
.search-form input { flex: 1; min-width: 0; padding: .7rem 16px .7rem 10px; border: 0; outline: 0; background: transparent; color: var(--text); font: inherit; font-size: .95rem; }
.search-form input::placeholder { color: var(--muted); }
.search-form input::-webkit-search-cancel-button { -webkit-appearance: none; appearance: none; }
.theme-toggle { display: grid; flex: 0 0 42px; place-items: center; width: 42px; height: 42px; padding: 0; border: 1px solid var(--border); border-radius: 50%; background: transparent; color: var(--text); cursor: pointer; }
.theme-toggle-icon {
    position: relative;
    display: block;
    width: 20px;
    height: 20px;
    overflow: hidden;
    border: 1.5px solid currentColor;
    border-radius: 50%;
    background: var(--bg);
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent), transparent 88%);
    transition: transform .25s ease, box-shadow .25s ease;
}
.theme-toggle-icon::after {
    content: "";
    position: absolute;
    inset: -1px -1px -1px 50%;
    border-radius: 0 999px 999px 0;
    background: linear-gradient(160deg, var(--link), var(--accent));
}
.theme-toggle:hover .theme-toggle-icon,
.theme-toggle:focus-visible .theme-toggle-icon {
    box-shadow: 0 0 0 5px color-mix(in srgb, var(--accent), transparent 80%);
    transform: rotate(18deg) scale(1.06);
}
.main-nav { display: flex; align-items: center; gap: 24px; }
.main-nav a { color: var(--text); font-size: 1.1rem; font-weight: 600; }
.main-nav a:hover { color: var(--link); text-decoration: none; }
.nav-toggle { display: none; border: 0; background: transparent; padding: .4rem; cursor: pointer; }
.nav-toggle span { display: block; width: 24px; height: 2px; margin: 5px; background: var(--text); }
.title-bar { padding: 2.5rem 0 2rem; background: var(--surface); border-bottom: 1px solid var(--border); }
h1, h2 { line-height: 1.2; }
.title-bar h1 { margin: 0; font-size: clamp(2rem, 4vw, 3rem); }
.title-bar h1 a { color: var(--text); }
.layout { display: grid; grid-template-columns: minmax(0, 1fr) var(--sidebar-width); gap: var(--layout-gap); padding-top: clamp(18px, 3vw, 34px); padding-bottom: 11px; }
.layout.single-column { display: block; padding-top: clamp(18px, 3vw, 34px); }
.layout:not(.single-column) .popular-section { transform: none; }
.post-list { padding: 0; margin: 0; list-style: none; }
.news-intro { display: flex; justify-content: space-between; align-items: center; gap: 28px; margin: 0 0 48px; padding: 54px 56px; overflow: hidden; border-radius: 12px; background: linear-gradient(125deg, #071d2b, #0b3e4b 55%, #0b7564); color: #fff; }
.news-intro h1 { margin: 14px 0; font-size: clamp(2.1rem, 4vw, 3.8rem); line-height: 1.06; letter-spacing: -.04em; }
.news-intro h1 strong { color: #63e6bd; }
.maintenance-panel {
    padding: clamp(3rem, 9vw, 7rem) clamp(1.5rem, 6vw, 5rem);
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface);
}
.maintenance-panel h1 { margin: 1rem 0 .75rem; font-size: clamp(2rem, 5vw, 4rem); line-height: 1.1; }
.maintenance-panel p { max-width: 680px; margin: 0; color: var(--muted); white-space: pre-line; }
.error-page {
    display: grid;
    grid-template-columns: minmax(190px, .8fr) minmax(0, 1.2fr);
    gap: clamp(2rem, 7vw, 7rem);
    align-items: center;
    min-height: min(560px, calc(100vh - 210px));
    padding: clamp(2.5rem, 7vw, 6rem) 0;
}
.error-visual {
    display: flex;
    justify-content: center;
    color: var(--text);
    font-size: clamp(5rem, 15vw, 11rem);
    font-weight: 800;
    letter-spacing: -.12em;
    line-height: .85;
}
.error-visual-accent { color: var(--accent); }
.error-copy { max-width: 620px; }
.error-copy h1 { margin: 1rem 0 .75rem; font-size: clamp(2rem, 5vw, 4rem); }
.error-copy p { max-width: 560px; margin: 0; color: var(--muted); font-size: 1.08rem; }
.error-actions { display: flex; flex-wrap: wrap; gap: .85rem; margin-top: 2rem; }
.error-actions .button { min-width: 9rem; justify-content: center; }
.news-intro p { max-width: 600px; margin: 0; color: #c0dbd6; font-size: 1.05rem; }
.news-intro-mark { display: grid; flex: 0 0 150px; place-items: center; width: 150px; height: 150px; border: 1px solid rgba(103,231,190,.6); border-radius: 50%; transform: rotate(15deg); box-shadow: 0 0 55px rgba(50,221,177,.22); }
.news-intro-mark::before, .news-intro-mark::after { content: ""; position: absolute; width: 105px; height: 105px; border: 1px solid rgba(103,231,190,.35); border-radius: 50%; }
.news-intro-mark::after { width: 58px; height: 58px; }
.news-intro-mark span { z-index: 1; color: #63e6bd; font-size: 2.3rem; }

.about-page {
    width: 100%;
    padding: 0 0 2rem;
}
.about-layout {
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(320px, 3fr);
    gap: 1.25rem;
    align-items: start;
    margin-top: 0.35rem;
}
.about-panel {
    background: transparent;
    border: 0;
    border-radius: 0;
    padding: 0.9rem 0.25rem 1.1rem;
}
.about-tags-panel {
    min-height: 100%;
    padding-top: 0.4rem;
}
.about-copy h1 {
    margin: 0.3rem 0 0.7rem;
    font-size: clamp(2rem, 4vw, 3rem);
    color: #0f172a;
}
.about-intro {
    margin: 0;
    font-size: 1.02rem;
    line-height: 1.7;
    color: #334155;
}
.richtext-inline p {
    margin: 0;
}
.richtext-inline ul,
.richtext-inline ol {
    margin: 0.5rem 0 0.5rem 1.2rem;
}
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.7rem 0.65rem;
    margin: 1.35rem 0 1.2rem;
}
.tech-tag {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.65rem 1rem;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.06);
    border: 1px solid rgba(15, 23, 42, 0.08);
    color: #0f172a;
    font-size: 0.96rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    transition: transform .2s ease, box-shadow .2s ease, background-color .2s ease;
}
.tech-tag:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(59, 130, 246, 0.12);
    background: rgba(59, 130, 246, 0.08);
}
.muted-tag {
    opacity: 0.7;
}
.about-richtext {
    margin-top: 1rem;
    color: #1f2937;
    line-height: 1.8;
}
.about-richtext p { margin: 0 0 0.9rem; }
.about-richtext ul, .about-richtext ol { margin: 0 0 1rem 1.2rem; }
.about-contact-panel {
    padding-top: 0.35rem;
    padding-bottom: 0;
}
.about-contact-panel h2 {
    margin: 0 0 0.9rem;
    font-size: clamp(2rem, 3vw, 2.5rem);
    color: #0f172a;
}
.form-success {
    margin: 0 0 1rem;
    padding: 0.8rem 1rem;
    border-left: 4px solid #0f766e;
    background: rgba(13, 148, 136, 0.08);
    color: #0f172a;
}
.form-success p {
    margin: 0;
    font-weight: 600;
}
.contact-form {
    display: grid;
    gap: 0.9rem;
}
.field-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}
.field-wrap {
    position: relative;
    display: block;
}
.field-full {
    position: relative;
}
.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    min-height: 3.4rem;
    padding: 0.9rem 1rem;
    border: 1px solid rgba(148, 163, 184, 0.3);
    border-radius: 0;
    background: rgba(148, 163, 184, 0.12);
    color: #0f172a;
    font: inherit;
    font-size: 1.05rem;
    box-shadow: none;
    transition: border-color .15s ease, background-color .15s ease, box-shadow .15s ease;
}
.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: #334155;
    opacity: 1;
}
.contact-form select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    padding-right: 2.8rem;
    cursor: pointer;
}
.contact-form textarea {
    min-height: 8.8rem;
    resize: vertical;
}
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: rgba(37, 99, 235, 0.55);
    background: rgba(59, 130, 246, 0.04);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.08);
}
.select-caret {
    position: absolute;
    right: 1.15rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.2rem;
    color: #0f172a;
    pointer-events: none;
}
.privacy-row {
    margin-top: 0.1rem;
}
.checkbox-wrap {
    display: flex;
    align-items: flex-start;
    gap: 0.7rem;
    color: #334155;
    font-size: 0.98rem;
    line-height: 1.5;
}
.checkbox-wrap input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    min-height: auto;
    margin-top: 0.18rem;
    accent-color: #1d4ed8;
}
.checkbox-wrap label {
    cursor: pointer;
}
.field-error {
    display: block;
    margin-top: 0.35rem;
    color: #b91c1c;
    font-size: 0.82rem;
}
.has-error input,
.has-error select,
.has-error textarea {
    border-color: rgba(185, 28, 28, 0.75);
    background: rgba(254, 242, 242, 0.75);
}
.action-row {
    display: grid;
    grid-template-columns: minmax(0, 1.8fr) minmax(120px, 0.7fr);
    gap: 0.75rem;
    margin-top: 0.15rem;
}
.submit-button,
.reset-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 3.75rem;
    border: 0;
    border-radius: 6px;
    font-size: clamp(1.05rem, 1.8vw, 1.8rem);
    font-weight: 700;
    letter-spacing: 0.02em;
    cursor: pointer;
    transition: transform .16s ease, box-shadow .16s ease, filter .16s ease, background-color .16s ease, border-color .16s ease, color .16s ease;
}
.submit-button {
    position: relative;
    width: 100%;
    background: linear-gradient(180deg, #1b8ef8 0%, #0d7ae7 100%);
    border: 1px solid #0a6fd7;
    border-bottom-color: #0959be;
    color: #fff;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.25), 0 2px 0 rgba(9, 84, 181, 0.18);
}
.submit-button::before {
    content: "";
    position: absolute;
    inset: 0 0 auto 0;
    height: 52%;
    border-radius: 6px 6px 0 0;
    background: linear-gradient(180deg, rgba(255,255,255,0.2), rgba(255,255,255,0));
    pointer-events: none;
}
.submit-button:hover,
.submit-button:focus-visible {
    background: linear-gradient(180deg, #2a97ff 0%, #0d7be7 100%);
    transform: translateY(-1px);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.25), 0 8px 18px rgba(12, 109, 227, 0.22);
    outline: none;
}
.reset-button {
    width: 100%;
    background: rgba(148, 163, 184, 0.12);
    color: #0f172a;
    border: 1px solid rgba(148, 163, 184, 0.45);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.5);
}
.reset-button:hover,
.reset-button:focus-visible {
    background: rgba(59, 130, 246, 0.08);
    border-color: rgba(59, 130, 246, 0.5);
    transform: translateY(-1px);
    box-shadow: 0 6px 14px rgba(15, 23, 42, 0.08);
    outline: none;
}

/* 首页大图轮播（深蓝底，仿客户评价横幅；图片来源/顺序由后台“首页大图”维护） */
.hero-carousel,
.carousel-viewport,
.carousel-slide { background: none; }
.hero-carousel { position: relative; margin: 0 0 48px; border-radius: 12px; overflow: hidden; color: #e8edf7; }
.carousel-viewport {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    aspect-ratio: 1200 / 420;
    min-height: 0;
}
.carousel-slide {
    position: absolute;
    inset: 0;
    display: block;
    opacity: 0;
    visibility: hidden;
    transition: opacity .4s ease, visibility .4s;
}
.carousel-slide.is-active { opacity: 1; visibility: visible; }
.carousel-slide[hidden] { display: block; }
.carousel-image {
    position: absolute;
    inset: 0;
    display: block;
    width: 100%;
    height: 100%;
    border-radius: 12px;
    object-fit: cover;
}
.carousel-quote { margin: 0; font-size: clamp(1.35rem, 2.6vw, 2.3rem); font-weight: 400; line-height: 1.45; color: rgba(232, 237, 247, .92); }
.carousel-attribution { margin: -14px 0 0; font-size: clamp(1rem, 1.6vw, 1.3rem); line-height: 1.5; color: rgba(214, 222, 238, .82); }
.carousel-link { display: inline-flex; align-items: center; gap: 10px; color: #46a7f5; font-size: clamp(1.05rem, 1.6vw, 1.3rem); font-weight: 600; }
.carousel-link:hover { color: #7cc3f9; text-decoration: none; }
.carousel-link span { transition: transform .2s ease; }
.carousel-link:hover span { transform: translateX(5px); }
.carousel-arrow {
    position: absolute; top: 50%; transform: translateY(-50%);
    z-index: 2;
    display: grid; place-items: center;
    width: 72px; height: 72px;
    border: 2px solid rgba(255, 255, 255, .55);
    border-radius: 50%;
    background: rgba(10, 24, 64, .42);
    color: rgba(255, 255, 255, .88);
    cursor: pointer;
    opacity: .72;
    transition: border-color .2s ease, color .2s ease, background-color .2s ease, opacity .2s ease;
}
.carousel-arrow svg { width: 26px; height: 26px; }
.carousel-arrow:hover, .carousel-arrow:focus-visible {
    border-color: #0876cf;
    color: #fff;
    background: #0876cf;
    opacity: 1;
    outline: none;
    box-shadow: 0 8px 20px rgba(8, 118, 207, .38);
    transform: translateY(-50%) scale(1.05);
}
.carousel-arrow-prev { left: 18px; }
.carousel-arrow-next { right: 18px; }
@media (max-width: 760px) {
    .hero-carousel { margin: 0 0 36px; }
    .carousel-viewport { min-height: 0; }
    .carousel-arrow { width: 42px; height: 42px; }
    .carousel-arrow svg { width: 18px; height: 18px; }
    .carousel-arrow-prev { left: 8px; }
    .carousel-arrow-next { right: 8px; }
    .about-layout { grid-template-columns: 1fr; }
    .field-row { grid-template-columns: 1fr; }
    .about-panel { padding-left: 0.75rem; padding-right: 0.75rem; }
}

.post-summary { padding: 0 0 2.5rem; margin-bottom: 2.5rem; border-bottom: 1px solid var(--border); }
.post-summary h2, .post-detail h2 { margin: 0 0 .5rem; }
.post-summary h2 { font-size: 1.4rem; }
.post-detail h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
.byline { margin: 0 0 1rem; color: var(--muted); font-size: .92rem; }
.post-summary p:not(.byline) { max-width: 720px; margin-top: .7rem; }
.read-more { display: inline-block; margin-top: .4rem; color: var(--link); font-weight: 650; }
.sidebar-section { padding: 0 0 2rem; margin-bottom: 2rem; border-bottom: 1px solid var(--border); }
.popular-section {
    padding-bottom: 1rem;
    margin-bottom: .5rem;
    border-bottom: 0;
}
@media (min-width: 761px) {
    .popular-section { margin-bottom: .5rem; }
}
.archive-section { border-bottom: 0; padding-bottom: 0; }
.archive-section > h2 { margin-bottom: .2rem; }
.sidebar h2 { margin-top: 0; font-size: 1.25rem; }
.archive-list details { border-bottom: 0; }
.archive-list summary { display: flex; justify-content: space-between; align-items: center; padding: .65rem 0; color: var(--link); cursor: pointer; list-style: none; }
.archive-list summary::-webkit-details-marker { display: none; }
.archive-list summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.archive-year { padding: .2rem 0; font-size: 1.12rem; }
.archive-month > summary { padding: .2rem 0 .42rem .8rem; font-size: .94rem; }
.archive-months { padding: 0 0 .4rem; }
.archive-toggle::before { content: "+"; display: inline-block; width: 1rem; font-weight: 700; text-align: center; }
.archive-list details[open] > summary .archive-toggle::before { content: "−"; }
.archive-days { margin: 0; padding: 0 0 .45rem 1.6rem; list-style: none; }
.archive-days li { margin: .25rem 0; font-size: .88rem; }
.archive-count { color: #d64545; font-size: .9em; font-style: normal; font-weight: 700; }
.muted, .search-summary { color: var(--muted); }
.search-summary { margin-top: 0; }
.empty-state { padding: 2rem; background: var(--surface); }
.pagination {
    display: flex;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: .6rem;
    padding-top: 1.25rem;
}
.pagination-toolbar {
    display: flex;
    flex: 0 0 auto;
    align-items: center;
    flex-wrap: nowrap;
    gap: .5rem;
    white-space: nowrap;
}
.pagination-total, .pagination-status { color: var(--muted); font-size: .9rem; }
.pagination-total { margin-right: .35rem; }
.pagination-pages {
    display: inline-flex;
    flex: 1 1 0;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: .35rem;
    margin-left: auto;
    min-width: 0;
    max-width: 100%;
    overflow: visible;
    padding-top: .3rem;
}
.pagination-button {
    position: relative;
    z-index: 0;
    display: inline-grid;
    min-width: 2rem;
    height: 2rem;
    place-items: center;
    padding: 0 .45rem;
    border: 1px solid var(--pagination-primary);
    border-radius: 4px;
    background: var(--bg);
    color: var(--pagination-primary);
    font-size: .9rem;
    font-weight: 600;
    transition: background-color .18s ease, border-color .18s ease,
        box-shadow .18s ease, color .18s ease, transform .18s ease;
}
.pagination-button[hidden] {
    display: none;
}
.pagination-button:hover, .pagination-button:focus-visible {
    z-index: 1;
    border-color: var(--pagination-primary-hover);
    background: var(--pagination-primary-hover);
    color: #fff;
    box-shadow: 0 3px 8px rgba(26, 143, 255, .25);
    text-decoration: none;
    transform: translateY(-2px);
}
.pagination-button.is-current {
    border-color: var(--pagination-primary);
    background: var(--pagination-primary);
    color: #fff;
    box-shadow: 0 2px 5px rgba(26, 143, 255, .2);
}
.pagination-button.is-current:hover, .pagination-button.is-current:focus-visible {
    border-color: var(--pagination-primary-hover);
    background: var(--pagination-primary-hover);
}
.pagination-button.is-disabled {
    border-color: var(--border);
    background: var(--surface);
    color: var(--border);
    cursor: default;
    pointer-events: none;
}
.pagination-status { margin: 0 .35rem; }
.post-detail { max-width: 820px; }
/* 详情标题比页眉“我的博客”（1.55rem）小一号 */
.post-detail h2 { font-size: 1.4rem; }
/* 标题与页眉之间的分割线：横跨内容区，与页脚“我有底线”整行总跨度一致 */
.detail-divider { width: 100%; margin: 1.5rem 0 1.75rem; border: 0; border-top: 1px solid var(--border); }
.post-back { margin: 0 0 1.5rem; }
.post-back .read-more,
.post-back .read-more:hover,
.post-back .read-more:focus-visible {
    border-bottom: 0;
    text-decoration: none;
}
.back-home-link {
    display: inline-flex;
    align-items: center;
    gap: .48rem;
    color: var(--link);
    font-weight: 700;
    transform-origin: left center;
    transition: transform .22s ease, color .22s ease;
}
.back-home-link:hover,
.back-home-link:focus-visible {
    color: var(--accent);
    text-decoration: none;
    transform: scale(1.04);
    outline: none;
}
.back-home-arrow {
    display: inline-grid;
    flex: 0 0 auto;
    place-items: center;
    width: 1.15rem;
    height: 1.15rem;
    overflow: visible;
    color: var(--link);
}
.back-home-arrow svg {
    width: 1.15rem;
    height: 1.15rem;
    overflow: visible;
}
.back-home-arrow path {
    stroke: currentColor;
    stroke-width: 1.9;
    stroke-linecap: round;
    stroke-linejoin: round;
    vector-effect: non-scaling-stroke;
}
.back-home-link:hover .back-home-arrow svg,
.back-home-link:focus-visible .back-home-arrow svg {
    animation: backArrowHeadFlow .9s linear infinite;
}
.back-home-text {
    line-height: 1;
}
.post-body { font-size: 1.08rem; }
.post-body p { margin: 0 0 1.25rem; }
.post-body video { display: block; width: min(100%, 900px); height: auto; margin: 1.25rem 0; border-radius: 8px; background: #111; }
.post-engagement {
    display: flex;
    justify-content: flex-start;
    margin-top: 2.5rem;
    padding-top: 1.25rem;
}
.like-form { display: inline-flex; align-items: center; gap: .55rem; }
.like-button {
    display: inline-flex;
    align-items: center;
    gap: .45rem;
    padding: .65rem 1rem;
    border: 1px solid #e25568;
    border-radius: 999px;
    background: var(--bg);
    color: #d83d55;
    font: inherit;
    font-size: .92rem;
    cursor: pointer;
    transition: background-color .18s ease, color .18s ease,
        box-shadow .18s ease, transform .18s ease;
}
.like-button:hover, .like-button:focus-visible, .like-button.is-liked {
    background: #d83d55;
    color: #fff;
    box-shadow: 0 4px 12px rgba(216, 61, 85, .25);
    outline: none;
    transform: translateY(-1px);
}
.like-button:disabled { cursor: wait; opacity: .75; }
.like-icon { font-size: 1.1rem; line-height: 1; }
.like-count { min-width: 1.6rem; color: var(--text); font-weight: 700; text-align: right; }
.like-label { color: var(--muted); font-size: .9rem; }
.site-footer { padding: 8px 0 28px; background: var(--bg); color: var(--text); }
.footer-bottom { margin-top: 11px; }
.footer-divider { display: flex; align-items: center; gap: 18px; color: var(--muted); font-size: .88rem; }
.footer-divider::before, .footer-divider::after { content: ""; flex: 1 1 auto; height: 1px; background: var(--border); }
.footer-divider span { white-space: nowrap; }
.footer-meta { margin: 16px 0 0; color: var(--muted); text-align: left; font-size: .9rem; }
.footer-meta p { margin: 0; }
.footer-core, .footer-beian { white-space: nowrap; }
.footer-beian { margin-left: 1rem; }
.footer-meta p + p { margin-top: .25rem; }
.footer-meta a { color: var(--link); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.hero { position: relative; display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: center; min-height: 520px; margin: 0 calc(var(--page-gutter) * -1); padding: 90px var(--page-gutter); overflow: hidden; background: linear-gradient(125deg, #071d2b, #0b3e4b 55%, #0b7564); color: #fff; }
.hero h1 { max-width: 680px; margin: 18px 0; font-size: clamp(2.7rem, 6vw, 5.5rem); line-height: 1.04; letter-spacing: -.05em; }
.hero h1 strong, .about-page h1 strong { color: #63e6bd; }
.hero-copy > p { max-width: 570px; color: #c0dbd6; font-size: 1.15rem; }
.eyebrow { color: #58d9ac; font-size: .75rem; font-weight: 800; letter-spacing: .14em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.button { display: inline-flex; align-items: center; gap: 12px; padding: .8rem 1.25rem; border: 1px solid transparent; border-radius: 4px; font-weight: 700; }
.button:hover { text-decoration: none; transform: translateY(-1px); }
.button-primary { background: #58d9ac; color: #063522; }
.button-quiet { border-color: rgba(255,255,255,.35); color: #fff; }
.button-outline { border-color: var(--accent); color: var(--link); }
.hero-orbit { position: relative; width: min(360px, 80vw); aspect-ratio: 1; border: 1px solid rgba(103,231,190,.5); border-radius: 50%; transform: rotate(-25deg); box-shadow: 0 0 100px rgba(50,221,177,.2); }
.hero-orbit::before, .hero-orbit::after { content: ""; position: absolute; inset: 12%; border: 1px solid rgba(103,231,190,.35); border-radius: 50%; }
.hero-orbit::after { inset: 25%; }
.hero-orbit span, .hero-orbit i, .hero-orbit b { position: absolute; width: 13px; height: 13px; border-radius: 50%; background: #65e6be; box-shadow: 0 0 22px #65e6be; }
.hero-orbit span { top: 8%; left: 53%; }.hero-orbit i { top: 56%; right: 3%; }.hero-orbit b { bottom: 9%; left: 27%; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; padding: 74px 0; }
.feature-grid article { padding: 28px; border: 1px solid var(--border); border-radius: 8px; background: var(--bg); }
.feature-icon { color: var(--accent); font-size: 1.8rem; }.feature-grid h2 { margin: 18px 0 8px; font-size: 1.25rem; }.feature-grid p { margin: 0; color: var(--muted); }
.home-cta { display: flex; justify-content: space-between; align-items: center; gap: 20px; margin-bottom: 70px; padding: 35px; border-radius: 8px; background: var(--surface); }.home-cta h2 { margin: 8px 0 0; font-size: 2rem; }
.about-page { padding: 25px 0 80px; }
/* 标题与正文限宽便于阅读；标题下方实线撑满内容区，与页脚“我有底线”实线总跨度（含文字占位）一致 */
.about-title,
.about-richtext { max-width: 820px; }
.about-title { margin: 0 0 18px; font-size: clamp(1.9rem, 3.5vw, 2.6rem); line-height: 1.2; }
.about-divider { width: 100%; margin: 0 0 28px; border: 0; border-top: 1px solid var(--border); }
.about-richtext { font-size: 1.05rem; line-height: 1.85; }
.about-richtext :first-child { margin-top: 0; }
.about-richtext :last-child { margin-bottom: 0; }
.about-richtext h2 { margin: 1.6em 0 .5em; font-size: 1.45rem; }
.about-richtext h3 { margin: 1.4em 0 .5em; font-size: 1.2rem; }
.about-richtext p { margin: 0 0 1em; }
.about-richtext ul, .about-richtext ol { margin: 0 0 1em; padding-left: 1.8em; }
.about-richtext li { margin: .35em 0; }
.about-richtext a { color: var(--link); text-decoration: underline; }
.about-richtext blockquote { margin: 1em 0; padding: .4em 1.1em; border-left: 3px solid var(--border); color: var(--muted); }
.about-richtext img { max-width: 100%; height: auto; border-radius: 8px; }
@media (max-width: 760px) {
    .header-inner { flex-wrap: wrap; padding: 14px 0; }
    .nav-toggle { display: block; margin-left: auto; }
    .main-nav { display: none; order: 4; width: 100%; flex-direction: column; align-items: stretch; gap: 0; padding: 8px 0; }
    .menu-open .main-nav { display: flex; }
    .main-nav a { padding: 12px 4px; border-top: 1px solid rgba(255,255,255,.15); }
    .header-tools { order: 3; flex: 1 1 100%; gap: 12px; }
    .search-form { flex: 1 1 auto; width: auto; max-width: none; min-width: 0; margin: 0; }
    .theme-toggle { flex: 0 0 auto; }
    .layout { display: block; }
    .layout:not(.single-column) .popular-section { transform: none; }
    .sidebar { margin-top: 3rem; }
    .hero { grid-template-columns: 1fr; min-height: auto; margin-top: 0; padding-top: 70px; padding-bottom: 70px; }
    .hero-orbit { width: 220px; margin: 10px auto 0; }
    .feature-grid { grid-template-columns: 1fr; }
    .home-cta { align-items: flex-start; flex-direction: column; }
    .news-intro { align-items: flex-start; flex-direction: column; margin: 0 0 36px; padding: 38px 28px; }
    .news-intro-mark { display: none; }
    .error-page { grid-template-columns: 1fr; gap: 2rem; min-height: auto; padding: 4rem 0 5rem; }
    .error-visual { justify-content: flex-start; font-size: clamp(5.5rem, 28vw, 9rem); }
    .pagination {
        align-items: flex-start;
    }
    .pagination-pages {
        flex: 1 0 100%;
        justify-content: flex-start;
        min-width: 0;
        margin-left: 0;
        padding-top: .35rem;
    }
    .footer-core, .footer-beian { display: block; }
    .footer-beian { margin: .25rem 0 0; }
}

/* 悬浮“返回顶部”按钮（圆形 + 蓝色上箭头，水平对齐“文章归档”区块右下方；hover 左侧弹出文字气泡） */
.back-to-top {
    position: fixed;
    right: 20px;
    bottom: 36px;
    z-index: 900;
    display: grid;
    place-items: center;
    width: 52px;
    height: 52px;
    padding: 0;
    border: 1px solid var(--border);
    border-radius: 50%;
    background: var(--bg);
    color: var(--field-icon);
    box-shadow: 0 4px 16px rgba(0, 0, 0, .14);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px) scale(.92);
    transition: opacity .2s ease, transform .2s ease, visibility .2s ease, box-shadow .2s ease, right .2s ease;
}
/* 宽屏时让按钮右缘跟随页面流体边距。 */
@media (min-width: 1160px) {
    .back-to-top { right: var(--page-gutter); }
}
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0) scale(1); }
.back-to-top:hover, .back-to-top:focus-visible { box-shadow: 0 6px 22px rgba(0, 0, 0, .22); outline: none; }
.back-to-top svg { width: 24px; height: 24px; }
.back-to-top-tip {
    position: absolute;
    right: calc(100% + 14px);
    top: 50%;
    transform: translateY(-50%) translateX(6px);
    padding: 10px 18px;
    border-radius: 10px;
    background: var(--bg);
    color: var(--muted);
    font-size: .95rem;
    line-height: 1;
    white-space: nowrap;
    box-shadow: 0 4px 16px rgba(0, 0, 0, .14);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity .18s ease, transform .18s ease, visibility .18s ease;
}
.back-to-top:hover .back-to-top-tip,
.back-to-top:focus-visible .back-to-top-tip {
    opacity: 1;
    visibility: visible;
    transform: translateY(-50%) translateX(0);
}
@media (max-width: 760px) {
    .back-to-top { right: 16px; bottom: 20px; width: 46px; height: 46px; }
    .back-to-top-tip { display: none; }
}

/* 侧边栏“热门文章”：最热 / 最新 纯 CSS 选项卡，标题单行省略（…） */
.popular-tabs > input[type="radio"] { position: absolute; width: 1px; height: 1px; margin: 0; opacity: 0; pointer-events: none; }
.popular-tab-labels { display: flex; gap: 8px; margin-bottom: .9rem; }
.popular-tab-labels label { flex: 1 1 0; padding: .42rem 0; border: 1px solid var(--border); border-radius: 6px; text-align: center; font-size: .85rem; color: var(--muted); cursor: pointer; transition: color .15s ease, border-color .15s ease; }
.popular-tab-labels label:hover { color: var(--link); border-color: var(--link); }
#popular-tab-hot:checked ~ .popular-tab-labels label[for="popular-tab-hot"],
#popular-tab-new:checked ~ .popular-tab-labels label[for="popular-tab-new"] { color: var(--link); border-color: var(--link); font-weight: 600; }
.popular-list { display: none; margin: 0; padding: 0; list-style: none; }
#popular-tab-hot:checked ~ .popular-list-hot,
#popular-tab-new:checked ~ .popular-list-new { display: block; }
.popular-list li { padding: .46rem 0; }
.popular-list a { display: block; color: var(--text); font-size: .9rem; line-height: 1.4; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.popular-list a:hover { color: var(--link); }

@media (max-width: 760px) {
    .site-header {
        overflow: visible;
    }
    .header-inner {
        position: relative;
    }
    .nav-toggle {
        position: relative;
        display: grid;
        place-items: center;
        width: 48px;
        height: 48px;
        margin-left: auto;
        padding: 0;
        border: 1px solid color-mix(in srgb, var(--border), transparent 18%);
        border-radius: 16px;
        background:
            linear-gradient(135deg, color-mix(in srgb, var(--surface-raised), transparent 12%), color-mix(in srgb, var(--bg), transparent 4%));
        box-shadow: 0 10px 26px rgba(15, 23, 42, .08), inset 0 1px 0 rgba(255,255,255,.5);
        transition: border-color .22s ease, box-shadow .22s ease, background .22s ease, transform .22s ease;
    }
    .nav-toggle:hover,
    .nav-toggle:focus-visible {
        border-color: color-mix(in srgb, var(--accent), var(--border) 35%);
        box-shadow: 0 14px 34px rgba(15, 23, 42, .13), 0 0 0 4px color-mix(in srgb, var(--accent), transparent 84%);
        outline: none;
        transform: translateY(-1px);
    }
    .nav-toggle span {
        position: absolute;
        width: 23px;
        height: 2px;
        margin: 0;
        border-radius: 999px;
        background: linear-gradient(90deg, var(--link), var(--accent));
        box-shadow: 0 0 12px color-mix(in srgb, var(--accent), transparent 64%);
        transform-origin: center;
        transition: transform .28s cubic-bezier(.2,.8,.2,1), opacity .2s ease, width .22s ease;
    }
    .nav-toggle span:nth-child(1) {
        transform: translateY(-7px);
    }
    .nav-toggle span:nth-child(2) {
        width: 18px;
        transform: translateY(0);
    }
    .nav-toggle span:nth-child(3) {
        transform: translateY(7px);
    }
    .menu-open .nav-toggle {
        border-color: color-mix(in srgb, var(--accent), var(--border) 25%);
        background:
            radial-gradient(circle at 25% 20%, color-mix(in srgb, var(--accent), transparent 72%), transparent 58%),
            linear-gradient(135deg, color-mix(in srgb, var(--surface-raised), transparent 5%), var(--bg));
    }
    .menu-open .nav-toggle span:nth-child(1) {
        transform: rotate(45deg);
    }
    .menu-open .nav-toggle span:nth-child(2) {
        opacity: 0;
        transform: scaleX(.25);
    }
    .menu-open .nav-toggle span:nth-child(3) {
        transform: rotate(-45deg);
    }
    .main-nav {
        position: absolute;
        top: calc(100% + 12px);
        right: 0;
        left: 0;
        z-index: 950;
        display: grid;
        width: 100%;
        padding: .65rem;
        border: 1px solid color-mix(in srgb, var(--border), transparent 22%);
        border-radius: 22px;
        background:
            linear-gradient(145deg, color-mix(in srgb, var(--surface-raised), transparent 2%), color-mix(in srgb, var(--bg), transparent 6%));
        box-shadow: 0 26px 70px rgba(15, 23, 42, .18);
        backdrop-filter: blur(20px);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transform: translateY(-10px) scale(.98);
        transition: opacity .24s ease, visibility .24s ease, transform .24s cubic-bezier(.2,.8,.2,1);
    }
    .menu-open .main-nav {
        display: grid;
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        transform: translateY(0) scale(1);
    }
    .main-nav a {
        position: relative;
        display: flex;
        align-items: center;
        min-height: 52px;
        padding: 0 1rem;
        border: 0;
        border-radius: 16px;
        color: var(--text);
        font-size: 1.05rem;
        font-weight: 750;
        letter-spacing: -.01em;
        transition: background-color .18s ease, color .18s ease, transform .18s ease;
    }
    .main-nav a::after {
        content: "›";
        margin-left: auto;
        color: var(--accent);
        font-size: 1.25rem;
        opacity: .72;
        transition: transform .18s ease, opacity .18s ease;
    }
    .main-nav a:hover,
    .main-nav a:focus-visible {
        background: color-mix(in srgb, var(--accent), transparent 86%);
        color: var(--link);
        text-decoration: none;
        outline: none;
        transform: translateX(2px);
    }
    .main-nav a:hover::after,
    .main-nav a:focus-visible::after {
        opacity: 1;
        transform: translateX(3px);
    }
}

@media (prefers-reduced-motion: reduce) {
    .nav-toggle,
    .nav-toggle span,
    .main-nav,
    .main-nav a,
    .main-nav a::after,
    .back-home-link,
    .back-home-arrow svg,
    .post-read-more,
    .post-read-more-arrow {
        transition: none;
        animation: none;
    }
}

@keyframes backArrowHeadFlow {
    0% {
        opacity: 0;
        transform: translateX(5px);
    }
    18% {
        opacity: 1;
    }
    72% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: translateX(-5px);
    }
}

@keyframes readMoreArrowFlow {
    0% {
        opacity: 0;
        transform: translateX(-5px);
    }
    18% {
        opacity: 1;
    }
    72% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: translateX(5px);
    }
}

body {
    min-height: 100vh;
    background:
        radial-gradient(circle at top left, rgba(68, 183, 139, .13), transparent 34rem),
        radial-gradient(circle at 85% 10%, rgba(26, 143, 255, .1), transparent 28rem),
        var(--bg);
}
[data-theme="dark"] body {
    background:
        radial-gradient(circle at 8% -8%, rgba(72, 207, 157, .14), transparent 34rem),
        radial-gradient(circle at 92% 4%, rgba(40, 112, 166, .13), transparent 31rem),
        linear-gradient(145deg, #080c13 0%, #070b11 48%, #090e16 100%);
    background-attachment: fixed;
}
.site-header {
    position: sticky;
    top: 0;
    z-index: 800;
    border-bottom: 1px solid color-mix(in srgb, var(--border), transparent 36%);
    background: color-mix(in srgb, var(--bg), transparent 8%);
    backdrop-filter: blur(18px);
}
[data-theme="dark"] .site-header {
    border-bottom-color: rgba(139, 160, 180, .16);
    background: rgba(7, 11, 17, .76);
    box-shadow: 0 10px 35px rgba(0, 0, 0, .22);
    backdrop-filter: blur(22px) saturate(130%);
}
[data-theme="dark"] .search-form {
    border-color: rgba(133, 155, 176, .13);
    background: rgba(17, 27, 39, .92);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, .035);
}
[data-theme="dark"] .search-form:focus-within {
    border-color: rgba(79, 209, 160, .65);
    background: #121e2b;
    box-shadow: 0 0 0 4px rgba(79, 209, 160, .09);
}
[data-theme="dark"] .theme-toggle {
    border-color: rgba(140, 163, 184, .28);
    background: linear-gradient(145deg, rgba(24, 35, 48, .96), rgba(10, 16, 24, .96));
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, .07), 0 8px 22px rgba(0, 0, 0, .24);
}
[data-theme="dark"] .theme-toggle-icon {
    background: #0a1018;
    box-shadow: 0 0 0 4px rgba(79, 209, 160, .1), 0 0 18px rgba(79, 209, 160, .12);
}
.brand span { letter-spacing: -.03em; }
.theme-toggle,
.search-form,
.pagination-button,
.back-to-top,
.social-chip {
    border-radius: 999px;
}
.theme-toggle:hover,
.theme-toggle:focus-visible {
    border-color: var(--accent);
    color: var(--link);
    background: color-mix(in srgb, var(--accent), transparent 91%);
    box-shadow: 0 8px 22px color-mix(in srgb, var(--accent), transparent 78%);
    outline: none;
}
.layout {
    align-items: start;
}
.news-intro,
.hero-carousel,
.maintenance-panel,
.post-summary,
.sidebar-section,
.about-contact-panel,
.empty-state {
    box-shadow: var(--shadow-soft);
}
.news-intro,
.hero-carousel,
.maintenance-panel,
.empty-state {
    border: 1px solid color-mix(in srgb, var(--border), transparent 45%);
    border-radius: var(--radius-lg);
}
.news-intro {
    background:
        radial-gradient(circle at 82% 12%, rgba(99, 230, 189, .28), transparent 15rem),
        linear-gradient(135deg, #061923 0%, #0a3344 54%, #08715f 100%);
}
.carousel-image {
    border-radius: var(--radius-lg);
}
.post-summary {
    padding: 1.45rem 1.55rem;
    margin-bottom: 1.35rem;
    border: 1px solid color-mix(in srgb, var(--border), transparent 28%);
    border-radius: var(--radius-md);
    background: var(--surface-raised);
    transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.post-summary:hover {
    border-color: color-mix(in srgb, var(--accent), var(--border) 45%);
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}
[data-theme="dark"] .post-summary,
[data-theme="dark"] .sidebar-section,
[data-theme="dark"] .post-detail,
[data-theme="dark"] .about-contact-panel,
[data-theme="dark"] .maintenance-panel,
[data-theme="dark"] .empty-state {
    border-color: rgba(137, 158, 179, .16);
    background:
        linear-gradient(145deg, rgba(18, 27, 39, .94), rgba(11, 17, 26, .94));
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, .035),
        0 22px 55px rgba(0, 0, 0, .3);
}
[data-theme="dark"] .post-summary:hover {
    border-color: rgba(79, 209, 160, .42);
    background:
        linear-gradient(145deg, rgba(20, 31, 43, .98), rgba(12, 20, 29, .98));
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, .05),
        0 28px 68px rgba(0, 0, 0, .42),
        0 0 0 1px rgba(79, 209, 160, .035);
}
.post-summary h2 a,
.post-detail h2 {
    color: var(--text);
    letter-spacing: -.025em;
}
.post-summary h2 a:hover {
    color: var(--link);
    text-decoration: none;
}
.read-more {
    border-bottom: 1px solid color-mix(in srgb, var(--link), transparent 64%);
}
.read-more:hover {
    border-bottom-color: currentColor;
    text-decoration: none;
}
.post-read-more,
.post-read-more:hover,
.post-read-more:focus-visible {
    display: inline-flex;
    align-items: center;
    gap: .38rem;
    border-bottom: 0;
    text-decoration: none;
}
.post-read-more {
    transform-origin: left center;
    transition: color .2s ease, transform .2s ease;
}
.post-read-more:hover,
.post-read-more:focus-visible {
    color: var(--accent);
    outline: none;
    transform: scale(1.04);
}
.post-read-more-arrow {
    width: 1.15rem;
    height: 1.15rem;
    overflow: visible;
}
.post-read-more-arrow path {
    stroke: currentColor;
    stroke-width: 1.9;
    stroke-linecap: round;
    stroke-linejoin: round;
    vector-effect: non-scaling-stroke;
}
.post-read-more:hover .post-read-more-arrow,
.post-read-more:focus-visible .post-read-more-arrow {
    animation: readMoreArrowFlow .9s linear infinite;
}
.sidebar-section {
    padding: 1.15rem;
    border: 1px solid color-mix(in srgb, var(--border), transparent 28%);
    border-radius: var(--radius-md);
    background: var(--surface-raised);
}
.popular-section,
.archive-section {
    border-bottom: 1px solid color-mix(in srgb, var(--border), transparent 28%);
}
.archive-section {
    padding-bottom: 1.15rem;
}
.post-detail {
    width: 100%;
    max-width: none;
    margin: 0 0 3rem;
    padding: clamp(1.2rem, 4vw, 2.25rem);
    border: 1px solid color-mix(in srgb, var(--border), transparent 35%);
    border-radius: var(--radius-lg);
    background: var(--surface-raised);
    box-shadow: var(--shadow-soft);
}
.detail-divider {
    display: none;
}
.post-body {
    color: color-mix(in srgb, var(--text), var(--muted) 12%);
}
.post-body img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
}
.post-neighbors {
    display: grid;
    grid-template-columns: 1fr;
    gap: .9rem;
    margin-top: 3.25rem;
}
.post-neighbor {
    display: grid;
    gap: .25rem;
    min-height: 5.5rem;
    padding: 1rem;
    border: 1px solid color-mix(in srgb, var(--border), transparent 25%);
    border-radius: var(--radius-md);
    background: color-mix(in srgb, var(--surface), transparent 24%);
    color: var(--text);
}
.post-neighbor:hover,
.post-neighbor:focus-visible {
    border-color: var(--accent);
    color: var(--link);
    text-decoration: none;
    transform: translateY(-1px);
}
.post-neighbor span {
    color: var(--muted);
    font-size: .82rem;
}
.post-neighbor strong {
    overflow: hidden;
    font-size: .98rem;
    line-height: 1.45;
    text-overflow: ellipsis;
}
.empty-state {
    display: grid;
    justify-items: start;
    gap: .35rem;
}
.empty-state-mark {
    display: grid;
    place-items: center;
    width: 2.4rem;
    height: 2.4rem;
    border-radius: 50%;
    background: color-mix(in srgb, var(--accent), transparent 78%);
    color: var(--link);
    font-size: 1.35rem;
}
.about-layout {
    gap: clamp(1.5rem, 4vw, 3rem);
}
.about-panel,
.about-page {
    color: var(--text);
}
.about-copy h1,
.about-contact-panel h2,
.about-intro,
.about-richtext,
.checkbox-wrap,
.select-caret,
.reset-button {
    color: var(--text);
}
.about-intro,
.checkbox-wrap {
    color: var(--muted);
}
.about-contact-panel {
    padding: clamp(1.25rem, 3vw, 2rem);
    border: 1px solid color-mix(in srgb, var(--border), transparent 28%);
    border-radius: var(--radius-lg);
    background: var(--surface-raised);
}
.tech-tag {
    background: color-mix(in srgb, var(--surface), transparent 18%);
    border-color: color-mix(in srgb, var(--border), transparent 25%);
    color: var(--text);
}
.contact-form input,
.contact-form select,
.contact-form textarea,
.reset-button {
    border-radius: 14px;
    background: color-mix(in srgb, var(--surface), transparent 18%);
    color: var(--text);
}
.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--muted);
}
.submit-button {
    border-radius: 14px;
    background: linear-gradient(180deg, #2a97ff 0%, #0d7be7 100%);
    border: 1px solid color-mix(in srgb, #0d7be7, var(--border) 18%);
    color: #fff;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.24), 0 6px 16px rgba(12, 109, 227, 0.18);
}
.submit-button::before {
    border-radius: 14px 14px 0 0;
}
.submit-button:hover,
.submit-button:focus-visible {
    background: linear-gradient(180deg, #3ca0ff 0%, #0d7be7 100%);
    border-color: color-mix(in srgb, #0d7be7, var(--border) 8%);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.24), 0 8px 18px rgba(12, 109, 227, 0.22);
}
.reset-button:hover,
.reset-button:focus-visible {
    background: color-mix(in srgb, var(--surface), var(--accent) 10%);
    border-color: color-mix(in srgb, var(--accent), var(--border) 35%);
    box-shadow: 0 8px 18px rgba(15, 23, 42, .1);
}
.site-footer {
    padding-top: 26px;
}
.footer-social {
    display: flex;
    flex-wrap: wrap;
    gap: .65rem;
    margin: 0 0 1rem;
}
.social-chip {
    display: inline-flex;
    align-items: center;
    gap: .42rem;
    max-width: 100%;
    padding: .42rem .75rem;
    border: 1px solid color-mix(in srgb, var(--border), transparent 25%);
    background: var(--surface-raised);
    color: var(--text);
    font-size: .86rem;
    box-shadow: 0 8px 22px rgba(15, 23, 42, .05);
}
.social-chip:hover,
a.social-chip:focus-visible {
    border-color: var(--accent);
    color: var(--link);
    text-decoration: none;
    transform: translateY(-1px);
}
.social-chip strong {
    overflow: hidden;
    max-width: 14rem;
    color: var(--muted);
    font-weight: 600;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.footer-line {
    display: flex;
    flex-wrap: wrap;
    gap: .25rem 1rem;
}
.footer-core,
.footer-beian {
    white-space: normal;
}
.footer-beian {
    margin-left: 0;
}

[data-theme="dark"] .news-intro {
    border-color: rgba(105, 224, 179, .2);
    background:
        radial-gradient(circle at 82% 12%, rgba(87, 222, 171, .2), transparent 16rem),
        linear-gradient(135deg, #071219 0%, #0a2029 52%, #0b3a34 100%);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, .045),
        0 30px 75px rgba(0, 0, 0, .42);
}
[data-theme="dark"] .pagination-button {
    border-color: rgba(91, 215, 167, .68);
    background: rgba(13, 21, 31, .82);
    color: #76dfb6;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, .035);
}
[data-theme="dark"] .pagination-button:hover,
[data-theme="dark"] .pagination-button:focus-visible,
[data-theme="dark"] .pagination-button.is-current {
    border-color: #67dcaf;
    background: linear-gradient(145deg, #55d5a4, #299b78);
    color: #04110c;
    box-shadow: 0 8px 22px rgba(45, 190, 139, .22);
}
[data-theme="dark"] .pagination-button.is-disabled {
    border-color: rgba(130, 151, 171, .14);
    background: rgba(19, 27, 37, .7);
    color: #536171;
}
[data-theme="dark"] .popular-tab-labels label {
    border-color: rgba(133, 154, 174, .18);
    background: rgba(9, 15, 23, .55);
}
[data-theme="dark"] #popular-tab-hot:checked ~ .popular-tab-labels label[for="popular-tab-hot"],
[data-theme="dark"] #popular-tab-new:checked ~ .popular-tab-labels label[for="popular-tab-new"] {
    border-color: rgba(79, 209, 160, .55);
    background: rgba(79, 209, 160, .09);
}
[data-theme="dark"] .post-neighbor,
[data-theme="dark"] .tech-tag,
[data-theme="dark"] .social-chip {
    border-color: rgba(133, 154, 174, .16);
    background: rgba(14, 23, 33, .8);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, .03);
}
[data-theme="dark"] .contact-form input,
[data-theme="dark"] .contact-form select,
[data-theme="dark"] .contact-form textarea,
[data-theme="dark"] .reset-button {
    border-color: rgba(135, 156, 177, .2);
    background: rgba(8, 14, 22, .72);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, .025);
}
[data-theme="dark"] .contact-form input:focus,
[data-theme="dark"] .contact-form select:focus,
[data-theme="dark"] .contact-form textarea:focus {
    border-color: rgba(79, 209, 160, .7);
    background: rgba(13, 23, 33, .94);
    box-shadow: 0 0 0 4px rgba(79, 209, 160, .09);
}
[data-theme="dark"] .submit-button {
    border-color: rgba(117, 231, 187, .38);
    background: linear-gradient(145deg, #61ddb0 0%, #2ca47d 100%);
    color: #04120c;
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, .28),
        0 10px 25px rgba(39, 171, 124, .22);
}
[data-theme="dark"] .submit-button:hover,
[data-theme="dark"] .submit-button:focus-visible {
    border-color: rgba(144, 239, 202, .6);
    background: linear-gradient(145deg, #75e7bd 0%, #35b188 100%);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, .3),
        0 13px 30px rgba(39, 171, 124, .3);
}
[data-theme="dark"] .site-footer {
    border-top: 1px solid rgba(133, 154, 174, .1);
    background: rgba(5, 9, 14, .38);
}
[data-theme="dark"] .footer-divider::before,
[data-theme="dark"] .footer-divider::after {
    background: linear-gradient(90deg, transparent, rgba(130, 153, 173, .28), transparent);
}
[data-theme="dark"] .back-to-top {
    border-color: rgba(130, 153, 173, .22);
    background: rgba(14, 22, 32, .92);
    box-shadow: 0 12px 32px rgba(0, 0, 0, .34);
}
[data-theme="dark"] ::selection {
    background: rgba(79, 209, 160, .3);
    color: #fff;
}

body,
.site-header,
.search-form,
.theme-toggle,
.post-summary,
.sidebar-section,
.post-detail,
.about-contact-panel,
.pagination-button,
.site-footer {
    transition:
        color .25s ease,
        background-color .25s ease,
        border-color .25s ease,
        box-shadow .25s ease;
}

@media (max-width: 760px) {
    [data-theme="dark"] .main-nav {
        border-color: rgba(133, 154, 174, .18);
        background:
            radial-gradient(circle at top right, rgba(79, 209, 160, .1), transparent 13rem),
            rgba(10, 16, 24, .97);
        box-shadow: 0 28px 75px rgba(0, 0, 0, .52);
    }
}

@media (max-width: 760px) {
    .page-width,
    .header-inner {
        width: calc(100% - 28px);
    }
    .post-summary,
    .post-detail,
    .about-contact-panel {
        border-radius: 18px;
    }
    .footer-social {
        gap: .5rem;
    }
    .social-chip {
        width: 100%;
        justify-content: space-between;
    }
    .post-neighbors {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 980px) {
    .layout {
        display: block;
    }
    .about-layout {
        grid-template-columns: 1fr;
    }
    .sidebar {
        margin-top: 3rem;
    }
}