/* ==========================================================================
   NetBlogs 前台主题
   ========================================================================== */
:root {
    --nb-bg: #f3f4f7;
    --nb-surface: #ffffff;
    --nb-ink: #1f2329;
    --nb-ink-2: #3a4150;
    --nb-muted: #6d7482;
    --nb-line: #e4e7ec;
    --nb-soft: #f1f2f6;
    --nb-primary: #3d56d8;
    --nb-primary-dark: #2f44b4;
    --nb-primary-soft: #eef1fe;
    --nb-primary-alt: #6d7ee6;
    --nb-primary-rgb: 61, 86, 216;
    --nb-dark: #161b26;
    --nb-radius: 14px;
    --nb-content-font: 1.02rem;
    --nb-shadow: 0 1px 2px rgba(16, 24, 40, .05), 0 8px 24px rgba(16, 24, 40, .06);
}

/* 深色调色板（data-bs-theme="dark" 由 _Layout 根据主题设置写入） */
[data-bs-theme="dark"] {
    --nb-bg: #0e1117;
    --nb-surface: #161b24;
    --nb-ink: #e6e9f0;
    --nb-ink-2: #c2c8d6;
    --nb-muted: #8b93a4;
    --nb-line: #262c38;
    --nb-soft: #1d2330;
    --nb-primary-soft: #1b2338;
    --nb-dark: #0a0d12;
    color-scheme: dark;
}
[data-bs-theme="dark"] .navbar-toggler-icon { filter: invert(1) grayscale(1) brightness(1.4); }
[data-bs-theme="dark"] .post-content pre { background: #0a0d12; }
[data-bs-theme="dark"] .site-nav { box-shadow: 0 1px 3px rgba(0, 0, 0, .4); }

html { scroll-behavior: smooth; }

body {
    font-family: "Segoe UI", system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: var(--nb-bg);
    color: var(--nb-ink);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--nb-primary); text-decoration: none; }
a:hover { color: var(--nb-primary-dark); }

/* ---------- 顶部工具条 ---------- */
.site-topbar {
    background: var(--nb-dark);
    color: #aeb4c0;
    font-size: .85rem;
}
.site-topbar .container { display: flex; justify-content: space-between; align-items: center; min-height: 34px; gap: .5rem; }
.site-topbar a { color: #cfd3dd; }
.site-topbar a:hover { color: #fff; }

/* ---------- 站名 ---------- */
.site-masthead {
    background: linear-gradient(170deg, var(--nb-surface) 0%, var(--nb-bg) 100%);
    border-bottom: 1px solid var(--nb-line);
    padding: 26px 0 22px;
    text-align: center;
}
.site-title {
    font-size: clamp(1.7rem, 4vw, 2.4rem);
    font-weight: 800;
    letter-spacing: .5px;
    color: var(--nb-ink);
}
.site-title a { color: inherit; }
.site-title .dot { color: var(--nb-primary); }
.site-tagline { color: var(--nb-muted); margin: 6px 0 0; font-size: .95rem; }

/* ---------- 主导航 ---------- */
.site-nav {
    background: var(--nb-surface);
    border-bottom: 1px solid var(--nb-line);
    position: sticky;
    top: 0;
    z-index: 1020;
    box-shadow: 0 1px 3px rgba(16, 24, 40, .03);
}
.site-nav .navbar-nav .nav-link {
    color: var(--nb-ink-2);
    font-weight: 500;
    padding: .65rem .85rem;
    border-bottom: 2px solid transparent;
    transition: color .15s, border-color .15s;
}
.site-nav .navbar-nav .nav-link:hover, .site-nav .navbar-nav .nav-link.active { color: var(--nb-primary); border-bottom-color: var(--nb-primary); }

.search-form .form-control { border-radius: 20px; border-color: var(--nb-line); background: var(--nb-soft); color: var(--nb-ink-2); padding-left: .9rem; }
.search-form .btn { border-radius: 20px; }

/* ---------- 主体 ---------- */
.site-main { padding: 26px 0 48px; min-height: 60vh; }

.page-hero {
    background: linear-gradient(120deg, var(--nb-primary) 0%, var(--nb-primary-alt) 100%);
    color: #fff;
    border-radius: var(--nb-radius);
    padding: 30px 34px;
    margin-bottom: 26px;
}
.page-hero h1 { font-weight: 800; margin: 0; font-size: 1.6rem; }
.page-hero p { margin: 6px 0 0; opacity: .92; }

/* ---------- 文章卡片 ---------- */
.post-card {
    background: var(--nb-surface);
    border: 1px solid var(--nb-line);
    border-radius: var(--nb-radius);
    overflow: hidden;
    transition: transform .18s ease, box-shadow .18s ease;
    display: block;
    color: inherit;
    margin-bottom: 22px;
}
.post-card:hover { transform: translateY(-3px); box-shadow: var(--nb-shadow); color: inherit; }
.post-card .thumb { display: block; width: 100%; height: 210px; object-fit: cover; }
.post-card .body { padding: 20px 24px 22px; }
.post-card .meta { font-size: .84rem; color: var(--nb-muted); display: flex; flex-wrap: wrap; gap: .6rem 1rem; align-items: center; }
.post-card .meta a { color: var(--nb-muted); }
.post-card .meta a:hover { color: var(--nb-primary); }
.post-card h2 { font-size: 1.28rem; font-weight: 700; margin: 10px 0 8px; line-height: 1.45; }
.post-card h2 a { color: var(--nb-ink); }
.post-card h2 a:hover { color: var(--nb-primary); }
.post-card .excerpt { color: var(--nb-ink-2); font-size: .95rem; }
.cat-pill {
    display: inline-block; font-size: .78rem; font-weight: 600;
    background: var(--nb-primary-soft); color: var(--nb-primary);
    padding: 2px 10px; border-radius: 20px; margin-right: 4px;
}
.cat-pill:hover { background: var(--nb-primary); color: #fff; }
.tag-pill { font-size: .8rem; color: var(--nb-muted); margin-left: 2px; }
.card-foot { border-top: 1px dashed var(--nb-line); padding-top: 12px; margin-top: 14px; font-size: .84rem; }

/* 紧凑列表风格（主题设置 → 列表样式） */
.post-card.compact {
    display: flex;
    align-items: stretch;
    margin-bottom: 16px;
}
.post-card.compact > a:first-child { flex: 0 0 180px; display: block; overflow: hidden; }
.post-card.compact .thumb { height: 100%; min-height: 132px; }
.post-card.compact .body { flex: 1; min-width: 0; padding: 16px 20px; }
.post-card.compact h2 { font-size: 1.1rem; margin: 6px 0 6px; }
.post-card.compact .excerpt {
    font-size: .9rem; margin: 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
    overflow: hidden;
}
.post-card.compact .card-foot { padding-top: 10px; margin-top: 10px; }
@media (max-width: 575.98px) {
    .post-card.compact { flex-direction: column; }
    .post-card.compact > a:first-child { flex: none; }
    .post-card.compact .thumb { height: 150px; min-height: 0; }
}

/* ---------- 模板：杂志头条 / 卡片网格 ---------- */
.mag-feature {
    position: relative; display: block; overflow: hidden; color: #fff;
    border-radius: var(--nb-radius); margin-bottom: 24px; background: var(--nb-dark);
}
.mag-feature .cover { display: block; width: 100%; min-height: 320px; max-height: 420px; object-fit: cover; }
.mag-feature .cover-fallback {
    display: flex; align-items: center; justify-content: center; font-size: 3rem; min-height: 320px;
    background: linear-gradient(120deg, var(--nb-primary) 0%, var(--nb-primary-alt) 100%);
}
.mag-feature .mag-body {
    position: absolute; left: 0; right: 0; bottom: 0; padding: 26px 30px;
    background: linear-gradient(180deg, rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, .74) 100%);
}
.mag-feature .mag-badge {
    display: inline-block; font-size: .75rem; font-weight: 700; margin-bottom: 8px;
    background: var(--nb-primary); color: #fff; padding: 3px 12px; border-radius: 20px;
}
.mag-feature h2 { font-size: clamp(1.28rem, 2.6vw, 1.85rem); font-weight: 800; margin: 0 0 6px; color: #fff; }
.mag-feature .excerpt {
    color: rgba(255, 255, 255, .92); margin: 0 0 8px; font-size: .95rem;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.mag-feature .mag-meta { display: flex; flex-wrap: wrap; gap: .3rem 1rem; font-size: .82rem; color: rgba(255, 255, 255, .88); }
.mag-feature:hover h2 { text-decoration: underline; text-underline-offset: 4px; }

.post-grid .post-card { height: 100%; margin-bottom: 0; }
.post-grid .post-card .thumb { height: 180px; }
.post-grid .post-card.compact { height: auto; }

/* ---------- 模板：沉浸阅读 / 空白页 ---------- */
.article-wrap.reading { padding: clamp(20px, 4vw, 52px); }
.article-wrap.reading .article-header h1 { font-size: clamp(1.45rem, 3vw, 1.9rem); }
.article-wrap.reading .post-content { font-size: 1.06rem; line-height: 1.95; }
.article-wrap.reading .post-content p { margin-bottom: 1.35em; }
.page-plain { padding: 4px 0 0; }
.page-plain .post-content { font-size: var(--nb-content-font); }

/* ---------- 侧栏 ---------- */
.widget {
    background: var(--nb-surface);
    border: 1px solid var(--nb-line);
    border-radius: var(--nb-radius);
    padding: 18px 20px;
    margin-bottom: 20px;
}
.widget h4 { font-size: .9rem; font-weight: 700; letter-spacing: 1px; color: var(--nb-ink); margin-bottom: 14px; padding-bottom: 10px; border-bottom: 2px solid var(--nb-ink); display: flex; align-items: center; }
.widget ul { list-style: none; margin: 0; padding: 0; }
.widget ul li { padding: 7px 0; border-bottom: 1px dashed var(--nb-line); display: flex; justify-content: space-between; align-items: center; font-size: .92rem; }
.widget ul li:last-child { border-bottom: none; }
.widget ul li a { color: var(--nb-ink-2); }
.widget ul li a:hover { color: var(--nb-primary); }
.widget ul li .count { background: var(--nb-soft); color: var(--nb-muted); font-size: .75rem; border-radius: 12px; padding: 1px 9px; }
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-cloud .tag { background: var(--nb-soft); color: var(--nb-muted); border-radius: 20px; font-size: .8rem; padding: 3px 12px; }
.tag-cloud .tag:hover { background: var(--nb-primary); color: #fff; }

/* ---------- 文章正文 ---------- */
.article-wrap { background: var(--nb-surface); border: 1px solid var(--nb-line); border-radius: var(--nb-radius); padding: clamp(18px, 4vw, 44px); }
.article-header { text-align: center; max-width: 780px; margin: 0 auto 22px; }
.article-header h1 { font-size: clamp(1.5rem, 3.4vw, 2.1rem); font-weight: 800; line-height: 1.4; margin-bottom: 14px; }
.article-header .meta { color: var(--nb-muted); font-size: .88rem; display: flex; justify-content: center; flex-wrap: wrap; gap: .5rem 1.2rem; align-items: center; }
.article-cover { border-radius: 10px; width: 100%; max-height: 460px; object-fit: cover; margin-bottom: 24px; }

.post-content { font-size: var(--nb-content-font); color: var(--nb-ink-2); }
.post-content h2, .post-content h3, .post-content h4 { color: var(--nb-ink); font-weight: 700; margin-top: 1.6em; margin-bottom: .6em; }
.post-content h2 { font-size: 1.4rem; padding-bottom: .4em; border-bottom: 1px solid var(--nb-line); }
.post-content h3 { font-size: 1.2rem; }
.post-content p { margin-bottom: 1.1em; }
.post-content img { max-width: 100%; height: auto; border-radius: 10px; margin: .6em 0; }
.post-content a { text-decoration: underline; text-underline-offset: 3px; }
.post-content blockquote { border-left: 4px solid var(--nb-primary); background: var(--nb-soft); padding: .8em 1.2em; border-radius: 0 10px 10px 0; color: var(--nb-ink-2); margin: 1.2em 0; }
.post-content code { background: var(--nb-soft); border-radius: 5px; padding: .12em .4em; font-size: .9em; color: var(--nb-primary-dark); }
.post-content pre { background: #161b26; color: #d7dce6; border-radius: 10px; padding: 1em 1.2em; overflow: auto; }
.post-content pre code { background: none; color: inherit; padding: 0; }
.post-content ul, .post-content ol { padding-left: 1.5em; margin-bottom: 1.1em; }
.post-content li { margin: .3em 0; }
.post-content table { width: 100%; border-collapse: collapse; margin: 1.2em 0; }
.post-content th, .post-content td { border: 1px solid var(--nb-line); padding: .5em .8em; }
.post-content th { background: var(--nb-soft); }
.post-content hr { border-color: var(--nb-line); }

.post-tags-row { border-top: 1px dashed var(--nb-line); margin-top: 26px; padding-top: 16px; display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }

/* 上下篇 */
.prevnext { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 22px; }
.prevnext a { display: block; background: var(--nb-bg); border: 1px solid var(--nb-line); border-radius: 10px; padding: 12px 16px; color: var(--nb-ink-2); font-size: .9rem; }
.prevnext a:hover { border-color: var(--nb-primary); color: var(--nb-primary); }
.prevnext .dir { display: block; font-size: .76rem; color: var(--nb-muted); margin-bottom: 2px; }
.prevnext .t { font-weight: 600; display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ---------- 评论 ---------- */
.comments-section { background: var(--nb-surface); border: 1px solid var(--nb-line); border-radius: var(--nb-radius); padding: clamp(18px, 3vw, 30px); margin-top: 22px; }
.comments-section h3 { font-size: 1.15rem; font-weight: 700; border-bottom: 2px solid var(--nb-ink); display: inline-block; padding-bottom: 6px; margin-bottom: 18px; }
.comment-item { display: flex; gap: 14px; padding: 14px 0; border-bottom: 1px dashed var(--nb-line); }
.comment-item:last-child { border-bottom: none; }
.avatar { width: 44px; height: 44px; border-radius: 50%; flex: 0 0 44px; font-weight: 700; color: #fff; display: flex; align-items: center; justify-content: center; font-size: 1rem; }
.avatar.g1 { background: linear-gradient(135deg, var(--nb-primary), var(--nb-primary-alt)); }
.avatar.g2 { background: linear-gradient(135deg, #d84315, #ff8f6b); }
.avatar.g3 { background: linear-gradient(135deg, #00897b, #4dd0c4); }
.avatar.g4 { background: linear-gradient(135deg, #ad1457, #ec7ab6); }
.comment-body { flex: 1; min-width: 0; }
.comment-meta { font-size: .86rem; color: var(--nb-muted); }
.comment-meta .name { font-weight: 600; color: var(--nb-ink); margin-right: 10px; }
.comment-text { margin: 4px 0 0; color: var(--nb-ink-2); font-size: .95rem; }

.comment-form label { font-weight: 600; font-size: .9rem; margin-bottom: 4px; }
.comment-form .form-control { border-radius: 8px; border-color: var(--nb-line); }
.comment-form .form-control:focus { border-color: var(--nb-primary); box-shadow: 0 0 0 .2rem rgba(var(--nb-primary-rgb), .18); }

.btn-nb { background: var(--nb-primary); border: 1px solid var(--nb-primary); color: #fff; border-radius: 8px; font-weight: 600; }
.btn-nb:hover { background: var(--nb-primary-dark); border-color: var(--nb-primary-dark); color: #fff; }

/* ---------- 分页 ---------- */
.pagination { gap: 6px; justify-content: center; margin-top: 10px; }
.pagination .page-link { border-radius: 8px !important; border: 1px solid var(--nb-line); color: var(--nb-ink-2); font-weight: 500; padding: .35rem .75rem; }
.pagination .page-item.active .page-link { background: var(--nb-primary); border-color: var(--nb-primary); color: #fff; }
.pagination .page-link:hover { color: var(--nb-primary); background: var(--nb-primary-soft); }

/* ---------- 登录页 ---------- */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: linear-gradient(160deg, #1d2440, #33407e); padding: 20px; }
.login-card { background: var(--nb-surface); border-radius: 16px; width: 100%; max-width: 400px; padding: 34px 34px 30px; box-shadow: 0 20px 60px rgba(0, 0, 0, .25); }
.login-logo { width: 52px; height: 52px; border-radius: 14px; background: linear-gradient(135deg, var(--nb-primary), var(--nb-primary-alt)); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 1.5rem; font-weight: 800; margin-bottom: 14px; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--nb-dark); color: #9aa1ae; font-size: .9rem; }
.site-footer .container { padding: 26px 0; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; }
.site-footer a { color: #c8cdd7; }
.site-footer a:hover { color: #fff; }

.alert-nb { border-radius: 10px; }

/* 小屏适配 */
@media (max-width: 575.98px) {
    .post-card h2 { font-size: 1.1rem; }
    .site-footer .container { flex-direction: column; text-align: center; }
}

/* ---------- 付费阅读 / 支付 ---------- */
.pay-chip { display: inline-flex; align-items: center; gap: 4px; background: rgba(220, 53, 69, .1); color: #dc3545; border-radius: 20px; padding: 3px 10px; font-size: .78rem; font-weight: 600; }
.pay-chip-ok { background: rgba(25, 135, 84, .12); color: #198754; }
.pay-teaser { position: relative; border-radius: 12px; margin-bottom: 18px; font-size: 1.02rem; line-height: 1.9; }
.pay-teaser p { margin: 0; color: var(--nb-muted); mask-image: linear-gradient(180deg, #000 60%, transparent); -webkit-mask-image: linear-gradient(180deg, #000 60%, transparent); padding-bottom: 6px; }
.paywall { border-radius: 14px; overflow: hidden; background: var(--nb-surface); }
.paywall .card-body { border-top: 3px solid #dc3545; }
.paywall-icon { width: 44px; height: 44px; border-radius: 12px; background: rgba(220, 53, 69, .1); color: #dc3545; display: flex; align-items: center; justify-content: center; font-size: 1.2rem; flex-shrink: 0; }
.paywall-price { font-size: 1.35rem; font-weight: 800; color: #dc3545; line-height: 1; }
.pay-btn { display: flex; align-items: center; border-radius: 10px; padding: 11px 16px; font-weight: 600; color: #fff; text-decoration: none; }
.pay-btn:hover { color: #fff; filter: brightness(1.06); }
.pay-btn-wechat { background: #07c160; }
.pay-btn-alipay { background: #1677ff; }
.pay-channel { cursor: pointer; transition: border-color .15s, box-shadow .15s; }
.pay-channel:has(input:checked) { border-color: var(--nb-primary) !important; box-shadow: 0 0 0 3px var(--nb-primary-soft); }
.pay-card { border-radius: 16px; }
.member-plan-featured { border: 2px solid #f5b50a !important; }

/* ==========================================================================
   UI 打磨层：质感 / 微交互 / 动效（覆盖既有规则，保持主题变量兼容）
   ========================================================================== */
::selection { background: rgba(var(--nb-primary-rgb), .22); }

/* 细滚动条 */
html { scroll-behavior: smooth; }
@media (pointer: fine) {
    * { scrollbar-width: thin; scrollbar-color: rgba(var(--nb-primary-rgb), .38) transparent; }
    ::-webkit-scrollbar { width: 9px; height: 9px; }
    ::-webkit-scrollbar-track { background: transparent; }
    ::-webkit-scrollbar-thumb {
        background: rgba(var(--nb-primary-rgb), .38);
        border-radius: 8px;
        border: 2px solid transparent;
        background-clip: content-box;
    }
    ::-webkit-scrollbar-thumb:hover { background: rgba(var(--nb-primary-rgb), .62); background-clip: content-box; border: 2px solid transparent; }
}

/* 锚点跳转不被吸顶导航遮挡 */
.post-content :is(h1, h2, h3, h4, h5), .article-header { scroll-margin-top: 86px; }

/* ---------- 站名首屏氛围 ---------- */
.site-masthead {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    background:
        radial-gradient(52% 120% at 50% -24%, rgba(var(--nb-primary-rgb), .14), transparent 72%),
        linear-gradient(180deg, var(--nb-surface) 0%, var(--nb-bg) 100%);
}
.site-masthead::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    opacity: .6;
    background-image: radial-gradient(rgba(var(--nb-primary-rgb), .18) 1px, transparent 1.5px);
    background-size: 26px 26px;
    -webkit-mask-image: radial-gradient(46% 90% at 50% 0%, #000 30%, transparent 78%);
    mask-image: radial-gradient(46% 90% at 50% 0%, #000 30%, transparent 78%);
}
.site-masthead::after {
    content: "";
    position: absolute;
    z-index: -1;
    width: 320px;
    height: 320px;
    right: -110px;
    top: -150px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(var(--nb-primary-rgb), .16), transparent 65%);
}
.site-title { position: relative; }
.site-title a {
    background: linear-gradient(120deg, var(--nb-ink) 18%, color-mix(in srgb, var(--nb-ink) 55%, var(--nb-primary-alt)));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.site-title .dot { -webkit-text-fill-color: var(--nb-primary); background: none; }
.site-tagline {
    letter-spacing: .06em;
    opacity: .95;
}
.site-tagline::before, .site-tagline::after { content: "—"; opacity: .45; margin: 0 .55em; color: var(--nb-primary); }
@media (max-width: 575.98px) {
    .site-masthead::before { background-size: 20px 20px; }
}

/* ---------- 毛玻璃吸顶导航 ---------- */
.site-nav {
    background: color-mix(in srgb, var(--nb-surface) 86%, transparent);
    -webkit-backdrop-filter: blur(14px) saturate(1.5);
    backdrop-filter: blur(14px) saturate(1.5);
}
.site-nav .navbar-nav .nav-link { position: relative; }
.site-nav .navbar-nav .nav-link > i { opacity: .75; }
.site-nav .navbar-nav .nav-link::after {
    content: "";
    position: absolute;
    left: .85rem;
    right: .85rem;
    bottom: 4px;
    height: 2px;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--nb-primary), var(--nb-primary-alt));
    transform: scaleX(0);
    transform-origin: center;
    transition: transform .2s ease;
}
.site-nav .navbar-nav .nav-link:hover::after, .site-nav .navbar-nav .nav-link.active::after { transform: scaleX(1); }
.site-nav .navbar-nav .nav-link:hover, .site-nav .navbar-nav .nav-link.active { color: var(--nb-primary); border-bottom-color: transparent; }
.site-nav .dropdown-menu {
    border-radius: 14px;
    border: 1px solid var(--nb-line);
    background: color-mix(in srgb, var(--nb-surface) 96%, transparent);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    box-shadow: 0 22px 48px -20px rgba(16, 24, 40, .3);
    padding: .45rem;
    margin-top: 8px;
}
.site-nav .dropdown-item { border-radius: 9px; padding: .45rem .8rem; color: var(--nb-ink-2); }
.site-nav .dropdown-item:hover { background: var(--nb-primary-soft); color: var(--nb-primary); }
@media (min-width: 992px) {
    .site-nav .nav-item.dropdown:hover > .dropdown-menu { display: block; }
    .site-nav .nav-item.dropdown:hover > .nav-link { color: var(--nb-primary); }
}
[data-bs-theme="dark"] .site-nav {
    background: color-mix(in srgb, var(--nb-surface) 78%, transparent);
}

/* 搜索框聚焦放大 */
.search-form { max-width: 340px; }
@media (min-width: 992px) {
    .search-form { width: 210px; transition: width .22s ease; }
    .search-form:focus-within { width: 290px; }
}
.search-form .form-control { border: 1px solid transparent; }
.search-form .form-control:focus { background: var(--nb-surface); border-color: var(--nb-primary); box-shadow: 0 0 0 .2rem rgba(var(--nb-primary-rgb), .14); }

/* ---------- Hero 微纹理 ---------- */
.page-hero {
    position: relative;
    overflow: hidden;
    box-shadow: 0 14px 34px -18px rgba(var(--nb-primary-rgb), .5);
}
.page-hero::before {
    content: "";
    position: absolute;
    right: -60px;
    top: -70px;
    width: 220px;
    height: 220px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 255, 255, .22), transparent 68%);
}
.page-hero::after {
    content: "";
    position: absolute;
    inset: 0;
    opacity: .35;
    background-image: radial-gradient(rgba(255, 255, 255, .5) 1px, transparent 1.4px);
    background-size: 22px 22px;
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 40%, transparent);
    mask-image: linear-gradient(90deg, transparent, #000 40%, transparent);
}
.page-hero > * { position: relative; }

/* ---------- 文章卡片润色 ---------- */
.post-card { position: relative; }
.post-card > a { display: block; overflow: hidden; }
.post-card .thumb { transition: transform .6s cubic-bezier(.2, .6, .2, 1); }
.post-card:hover .thumb { transform: scale(1.05); }
.post-card h2 a { transition: color .15s ease; background-image: linear-gradient(var(--nb-primary), var(--nb-primary)); background-size: 0 2px; background-repeat: no-repeat; background-position: 0 calc(100% - 1px); transition: background-size .25s ease, color .15s ease; }
.post-card h2 a:hover { background-size: 100% 2px; }
.post-card .excerpt {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.post-card.compact .excerpt { -webkit-line-clamp: 2; }
.post-card .meta span { display: inline-flex; align-items: center; gap: .28rem; }
.post-card .meta i { opacity: .55; }
.post-card .card-foot { align-items: center; }
.read-more {
    display: inline-flex;
    align-items: center;
    gap: 1px;
    margin-left: 12px;
    padding: 4px 13px;
    border-radius: 20px;
    background: var(--nb-primary-soft);
    color: var(--nb-primary);
    font-weight: 600;
    font-size: .84rem;
    transition: background .18s ease, color .18s ease, box-shadow .18s ease;
}
.read-more i { transition: transform .18s ease; }
.read-more:hover { background: var(--nb-primary); color: #fff; box-shadow: 0 6px 16px -6px rgba(var(--nb-primary-rgb), .55); }
.read-more:hover i { transform: translateX(3px); }
.mag-feature { box-shadow: 0 18px 44px -20px rgba(16, 24, 40, .4); }
.mag-feature .mag-body { padding-bottom: 20px; }

/* ---------- 组件打磨：widget / 标签云 / 按钮 ---------- */
.widget { box-shadow: 0 1px 2px rgba(16, 24, 40, .03); transition: box-shadow .18s ease; }
.widget:hover { box-shadow: 0 10px 26px -14px rgba(16, 24, 40, .12); }
.widget h4 {
    position: relative;
    border-bottom: 1px solid var(--nb-line);
    padding-left: 12px;
}
.widget h4::before {
    content: "";
    position: absolute;
    left: 0;
    top: 3px;
    bottom: 13px;
    width: 4px;
    border-radius: 3px;
    background: linear-gradient(180deg, var(--nb-primary), var(--nb-primary-alt));
}
.widget h4 i { color: var(--nb-primary); margin-right: 8px; }
.tag-cloud .tag { transition: transform .16s ease, background .16s ease, color .16s ease; }
.tag-cloud .tag:hover { transform: translateY(-2px); }
.cat-pill { transition: background .16s ease, transform .16s ease, box-shadow .16s ease; }
.cat-pill:hover { box-shadow: 0 4px 12px -4px rgba(var(--nb-primary-rgb), .5); }

.btn-nb, .btn-primary, .page-hero a.btn { transition: transform .15s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease; }
.btn-nb:active, .btn-primary:active { transform: scale(.97); }

/* ---------- 正文排版润色 ---------- */
.post-content a {
    text-decoration: none;
    background-image: linear-gradient(currentColor, currentColor);
    background-repeat: no-repeat;
    background-size: 0 1px;
    background-position: 0 100%;
    transition: background-size .22s ease;
    padding-bottom: 1px;
}
.post-content a:hover { background-size: 100% 1px; }
.post-content blockquote {
    position: relative;
    overflow: hidden;
    border-left: 0;
    border-radius: 12px;
    background: linear-gradient(180deg, var(--nb-soft), color-mix(in srgb, var(--nb-soft) 78%, var(--nb-primary-soft)));
}
.post-content blockquote::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, var(--nb-primary), var(--nb-primary-alt));
}
.post-content blockquote p:last-child { margin-bottom: 0; }
.post-content hr { border: none; height: 1px; background: linear-gradient(90deg, transparent, var(--nb-line) 18%, var(--nb-line) 82%, transparent); }
.post-content pre { box-shadow: inset 0 1px 0 rgba(255, 255, 255, .04); border: 1px solid rgba(255, 255, 255, .06); }
.post-content table { border-radius: 10px; overflow: hidden; }
.post-content th, .post-content td { padding: .6em .9em; }

/* ---------- 评论与分页 ---------- */
.comment-item { transition: background .15s ease; border-radius: 10px; padding: 14px 10px; margin: 0 -10px; }
.comment-item:hover { background: color-mix(in srgb, var(--nb-surface), var(--nb-soft) 60%); }
.comment-meta .name { color: var(--nb-primary); }
.pagination .page-link { transition: transform .15s ease, background .18s ease, color .18s ease; }
.pagination .page-item:not(.active) .page-link:hover { transform: translateY(-1px); }

/* ---------- 返回顶部 ---------- */
.back-top {
    position: fixed;
    right: 22px;
    bottom: 24px;
    z-index: 1080;
    width: 44px;
    height: 44px;
    border: 1px solid var(--nb-line);
    border-radius: 14px;
    background: color-mix(in srgb, var(--nb-surface) 88%, transparent);
    color: var(--nb-primary);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    box-shadow: var(--nb-shadow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition: opacity .22s ease, transform .22s ease, background .18s ease, color .18s ease;
}
.back-top.show { opacity: 1; visibility: visible; transform: none; }
.back-top:hover { background: var(--nb-primary); border-color: var(--nb-primary); color: #fff; }
@media (max-width: 575.98px) {
    .back-top { right: 14px; bottom: 18px; width: 40px; height: 40px; }
}

/* ---------- 登录页升级 ---------- */
.login-wrap {
    position: relative;
    overflow: hidden;
    background:
        radial-gradient(60% 90% at 15% 10%, rgba(124, 137, 255, .35), transparent 60%),
        radial-gradient(50% 80% at 90% 90%, rgba(56, 132, 255, .28), transparent 60%),
        linear-gradient(150deg, #141b33 0%, #27335f 55%, #1d2440 100%);
}
.login-wrap::before {
    content: "";
    position: absolute;
    inset: 0;
    opacity: .5;
    background-image: radial-gradient(rgba(255, 255, 255, .12) 1px, transparent 1.4px);
    background-size: 24px 24px;
}
.login-wrap > .login-card { position: relative; }
.login-card {
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, .5);
    background: color-mix(in srgb, var(--nb-surface) 90%, transparent);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    box-shadow: 0 30px 80px -20px rgba(0, 0, 0, .45);
    overflow: hidden;
}
.login-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--nb-primary), var(--nb-primary-alt));
}
.login-logo {
    background: linear-gradient(135deg, var(--nb-primary), #8b5cf6);
    box-shadow: 0 10px 24px -8px rgba(var(--nb-primary-rgb), .6);
}
.login-card .form-control { border-radius: 10px; }
.login-card .input-group-text { border-radius: 10px 0 0 10px; border-color: var(--nb-line); }
.login-card .form-control { border-left: 0; }
.login-card .form-control:focus { box-shadow: 0 0 0 .18rem rgba(var(--nb-primary-rgb), .16); }

/* 无障碍：系统关闭动效时整体减弱 */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ==========================================================================
   首页专属：topbar / footer 跟随主题主色（仅 .nb-home 生效，不影响其它页面）
   ========================================================================== */
.nb-home .site-topbar {
    background: linear-gradient(90deg, var(--nb-primary), var(--nb-primary-alt));
    color: rgba(255, 255, 255, .96);
}
.nb-home .site-topbar .container { min-height: 34px; }
.nb-home .site-topbar a { color: rgba(255, 255, 255, .96); }
.nb-home .site-topbar a:hover { color: #fff; opacity: .85; }

.nb-home .site-footer {
    background: linear-gradient(135deg, var(--nb-primary), var(--nb-primary-alt) 62%, color-mix(in srgb, var(--nb-primary) 42%, #0b0f1a));
    color: rgba(255, 255, 255, .95);
}
.nb-home .site-footer .container { padding: 30px 0 26px; }
.nb-home .site-footer a { color: rgba(255, 255, 255, .95); }
.nb-home .site-footer a:hover { color: #fff; }

/* 首页：版头（站名区）同样使用主题主色，与顶部工具条、底部连成一体 */
.nb-home .site-masthead {
    background:
        radial-gradient(58% 130% at 50% -30%, rgba(255, 255, 255, .18), transparent 70%),
        linear-gradient(135deg, var(--nb-primary) 0%, var(--nb-primary-alt) 100%);
    border-bottom: none;
}
.nb-home .site-masthead::before {
    opacity: .45;
    background-image: radial-gradient(rgba(255, 255, 255, .5) 1px, transparent 1.6px);
}
.nb-home .site-masthead::after {
    background: radial-gradient(circle, rgba(255, 255, 255, .22), transparent 65%);
}
.nb-home .site-title a {
    background: none;
    -webkit-text-fill-color: #fff;
    color: #fff;
}
.nb-home .site-title .dot { -webkit-text-fill-color: rgba(255, 255, 255, .82); }
.nb-home .site-tagline { color: rgba(255, 255, 255, .92); }
.nb-home .site-tagline::before,
.nb-home .site-tagline::after { color: rgba(255, 255, 255, .7); }
.nb-home .site-header-extra { color: rgba(255, 255, 255, .88); }

/* ---------- 文章内付费内容块 ---------- */
.post-content .nb-pay-block {
    position: relative;
    border-left: 3px solid var(--nb-primary);
    background: var(--nb-primary-soft);
    border-radius: 0 10px 10px 0;
    padding: 14px 16px;
    margin: 18px 0;
}
.post-content .nb-pay-block::before {
    content: "付费内容";
    display: inline-block;
    font-size: .72rem;
    font-weight: 700;
    color: var(--nb-primary);
    background: color-mix(in srgb, var(--nb-primary) 12%, transparent);
    border-radius: 20px;
    padding: 2px 10px;
    margin-bottom: 8px;
}
.pay-block-lock {
    border: 1px dashed var(--nb-primary);
    background: var(--nb-soft);
    border-radius: 12px;
    padding: 16px 18px;
    margin: 20px 0;
    text-align: center;
}
.pay-block-lock-head { font-weight: 700; color: var(--nb-ink); }
.pay-block-lock-tip { color: var(--nb-muted); font-size: .88rem; margin: 6px 0 12px; }
.pay-block-price { font-weight: 800; color: #dc3545; }
.pay-block-unlockbar {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    justify-content: space-between;
    border: 1px solid var(--nb-line);
    background: var(--nb-surface);
    border-radius: 12px;
    padding: 14px 16px;
    margin-top: 22px;
    font-size: .92rem;
}

/* ---------- 后台可配置的版头 / 底部内容 ---------- */
.site-logo { max-height: 56px; width: auto; vertical-align: middle; }
.site-header-extra { margin-top: 10px; font-size: .92rem; color: var(--nb-muted); }
.site-footer-extra { margin-top: 8px; font-size: .88rem; }