/**
 * AI Nexus — 页脚、内页、博客与响应式
 * @package AI_Nexus
 */

/* ------------------------------------------------------------------
 * 页脚
 * ------------------------------------------------------------------ */
.site-footer {
	position: relative;
	padding: 76px 0 0;
	background: #04060d;
	border-top: 1px solid var(--ai-border);
}

.footer-widgets {
	display: grid;
	grid-template-columns: 1.6fr 1fr 1fr 1fr;
	gap: 40px;
	padding-bottom: 52px;
}

.footer-brand .brand-link {
	margin-bottom: 16px;
}

.footer-brand p {
	font-size: 14px;
	color: var(--ai-muted);
	max-width: 320px;
}

.footer-contact {
	margin-top: 18px;
}

.footer-contact li {
	display: flex;
	align-items: center;
	gap: 8px;
	margin-bottom: 8px;
	font-size: 14px;
	color: var(--ai-muted);
}

.footer-contact .dashicons {
	color: var(--ai-primary);
	font-size: 15px;
	width: 15px;
	height: 15px;
}

.footer-col .widget-title {
	margin-bottom: 16px;
	font-size: 15px;
	color: var(--ai-text);
}

.footer-links li {
	margin-bottom: 10px;
	font-size: 14px;
	color: var(--ai-muted);
	transition: color .2s ease, transform .2s ease;
}

.footer-links li:hover {
	color: var(--ai-primary);
	transform: translateX(3px);
}

.footer-qr img {
	border-radius: 12px;
	padding: 6px;
	background: #fff;
}

.footer-bottom {
	padding: 22px 0;
	border-top: 1px solid var(--ai-border);
}

.footer-bottom-inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 20px;
	flex-wrap: wrap;
}

.copyright {
	margin: 0;
	font-size: 13px;
	color: var(--ai-muted);
}

.copyright a:hover {
	color: var(--ai-primary);
}

.footer-nav {
	display: flex;
	gap: 20px;
}

.footer-nav a {
	font-size: 13px;
	color: var(--ai-muted);
}

.footer-nav a:hover {
	color: var(--ai-primary);
}

.back-to-top {
	position: fixed;
	right: 24px;
	bottom: 24px;
	z-index: 900;
	display: flex;
	align-items: center;
	justify-content: center;
	width: 46px;
	height: 46px;
	color: var(--ai-text);
	background: rgba(11, 16, 32, .9);
	border: 1px solid var(--ai-border);
	border-radius: 50%;
	cursor: pointer;
	opacity: 0;
	visibility: hidden;
	transform: translateY(10px);
	transition: all .3s ease;
	backdrop-filter: blur(10px);
}

.back-to-top.is-visible {
	opacity: 1;
	visibility: visible;
	transform: none;
}

.back-to-top:hover {
	border-color: var(--ai-primary);
	color: var(--ai-primary);
}

/* ------------------------------------------------------------------
 * 内页头部
 * ------------------------------------------------------------------ */
.page-head {
	position: relative;
	padding: 72px 0 48px;
	background:
		radial-gradient(ellipse 60% 100% at 20% 0%, rgba(91, 140, 255, .18), transparent 70%),
		radial-gradient(ellipse 50% 100% at 80% 0%, rgba(168, 85, 247, .12), transparent 70%);
	border-bottom: 1px solid var(--ai-border);
}

.page-title {
	font-size: clamp(28px, 3.6vw, 42px);
	margin-bottom: 10px;
}

.page-subtitle {
	max-width: 720px;
	color: var(--ai-muted);
	margin: 0;
}

.ai-breadcrumb {
	display: flex;
	align-items: center;
	gap: 6px;
	margin-bottom: 16px;
	font-size: 13px;
	color: var(--ai-muted);
}

.ai-breadcrumb .dashicons {
	font-size: 13px;
	width: 13px;
	height: 13px;
	opacity: .6;
}

.ai-breadcrumb a:hover {
	color: var(--ai-primary);
}

.page-body {
	padding: 56px 24px 88px;
	display: grid;
	grid-template-columns: minmax(0, 1fr) 300px;
	gap: 48px;
	align-items: start;
}

.page-body.no-sidebar {
	grid-template-columns: 1fr;
}

.page-layout {
	min-width: 0;
}

.page-sidebar {
	position: sticky;
	top: calc(var(--ai-header-h) + 24px);
	display: flex;
	flex-direction: column;
	gap: 20px;
}

.widget {
	padding: 24px;
	background: var(--ai-bg-card);
	border: 1px solid var(--ai-border);
	border-radius: var(--ai-radius);
}

.widget-title {
	margin-bottom: 14px;
	font-size: 16px;
}

.widget ul li {
	padding: 8px 0;
	font-size: 14px;
	color: var(--ai-muted);
	border-bottom: 1px dashed var(--ai-border);
}

.widget ul li:last-child {
	border-bottom: 0;
}

.widget select,
.widget input[type="text"],
.widget input[type="search"] {
	width: 100%;
	padding: 10px 12px;
	color: var(--ai-text);
	background: rgba(255, 255, 255, .04);
	border: 1px solid var(--ai-border);
	border-radius: 10px;
}

.widget .search-submit {
	margin-top: 10px;
	padding: 9px 18px;
	border: 0;
	border-radius: 999px;
	cursor: pointer;
	font-weight: 600;
	color: #070b16;
	background: linear-gradient(120deg, var(--ai-primary), var(--ai-secondary));
}

/* 正文 */
.entry {
	padding: 34px;
	background: var(--ai-bg-card);
	border: 1px solid var(--ai-border);
	border-radius: 24px;
}

.entry-thumb {
	margin: -10px -10px 26px;
}

.entry-thumb img {
	width: 100%;
	border-radius: 18px;
}

.entry-meta {
	display: flex;
	flex-wrap: wrap;
	gap: 18px;
	font-size: 13px;
	color: var(--ai-muted);
}

.entry-meta .dashicons {
	font-size: 14px;
	width: 14px;
	height: 14px;
	color: var(--ai-primary);
}

.entry-meta a:hover {
	color: var(--ai-primary);
}

.entry-tags {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
	align-items: center;
	margin-top: 30px;
	padding-top: 22px;
	border-top: 1px solid var(--ai-border);
}

.tag-label {
	font-size: 13px;
	color: var(--ai-muted);
}

.entry-tags a {
	padding: 5px 12px;
	font-size: 13px;
	color: var(--ai-muted);
	background: rgba(255, 255, 255, .05);
	border: 1px solid var(--ai-border);
	border-radius: 999px;
}

.entry-tags a:hover {
	color: var(--ai-primary);
	border-color: var(--ai-primary);
}

.post-nav {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 16px;
	margin-top: 30px;
}

.post-nav > div {
	padding: 16px 18px;
	font-size: 14px;
	background: rgba(255, 255, 255, .03);
	border: 1px solid var(--ai-border);
	border-radius: var(--ai-radius-sm);
}

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

.post-nav a {
	color: var(--ai-muted);
	display: inline-flex;
	align-items: center;
	gap: 6px;
}

.post-nav a:hover {
	color: var(--ai-primary);
}

.page-links {
	margin-top: 24px;
	font-size: 14px;
	color: var(--ai-muted);
}

.page-links a {
	padding: 4px 10px;
	margin: 0 4px;
	border: 1px solid var(--ai-border);
	border-radius: 8px;
}

/* 文章卡片 */
.post-grid {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 22px;
}

.post-card {
	display: flex;
	flex-direction: column;
	background: var(--ai-bg-card);
	border: 1px solid var(--ai-border);
	border-radius: var(--ai-radius);
	overflow: hidden;
	transition: transform .35s ease, border-color .35s ease;
}

.post-card:hover {
	transform: translateY(-6px);
	border-color: rgba(91, 140, 255, .38);
}

.post-thumb {
	display: block;
	height: 176px;
	overflow: hidden;
	background: linear-gradient(135deg, rgba(91, 140, 255, .2), rgba(168, 85, 247, .15));
}

.post-thumb img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	transition: transform .5s ease;
}

.post-card:hover .post-thumb img {
	transform: scale(1.05);
}

.post-thumb-placeholder {
	display: flex;
	align-items: center;
	justify-content: center;
	height: 100%;
	color: rgba(255, 255, 255, .35);
}

.post-thumb-placeholder .dashicons {
	font-size: 40px;
	width: 40px;
	height: 40px;
}

.post-card-body {
	flex: 1;
	display: flex;
	flex-direction: column;
	padding: 24px;
}

.post-card-meta {
	display: flex;
	gap: 16px;
	margin-bottom: 12px;
	font-size: 12px;
	color: var(--ai-muted);
}

.post-card-meta .dashicons {
	font-size: 13px;
	width: 13px;
	height: 13px;
}

.posted-on {
	display: inline-flex;
	align-items: center;
	gap: 4px;
}

.post-card-title {
	font-size: 18px;
	line-height: 1.45;
	margin-bottom: 10px;
}

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

.post-card-excerpt {
	flex: 1;
	font-size: 14px;
	color: var(--ai-muted);
}

.post-card-link {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	margin-top: 14px;
	font-size: 14px;
	font-weight: 600;
	color: var(--ai-primary);
}

.post-card-link .dashicons {
	transition: transform .25s ease;
}

.post-card-link:hover .dashicons {
	transform: translateX(4px);
}

/* 分页 */
.pagination {
	margin-top: 44px;
}

.pagination .nav-links {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	gap: 8px;
}

.pagination .page-numbers {
	display: inline-flex;
	align-items: center;
	gap: 5px;
	min-width: 42px;
	height: 42px;
	padding: 0 14px;
	justify-content: center;
	font-size: 14px;
	color: var(--ai-muted);
	background: rgba(255, 255, 255, .03);
	border: 1px solid var(--ai-border);
	border-radius: 12px;
	transition: all .25s ease;
}

.pagination .page-numbers:hover,
.pagination .page-numbers.current {
	color: #070b16;
	background: linear-gradient(120deg, var(--ai-primary), var(--ai-secondary));
	border-color: transparent;
}

/* 空状态 / 404 */
.no-content,
.error-404 {
	padding: 90px 24px;
	text-align: center;
}

.no-content .dashicons {
	font-size: 48px;
	width: 48px;
	height: 48px;
	color: var(--ai-primary);
	margin-bottom: 10px;
}

.error-code {
	display: block;
	font-size: clamp(72px, 14vw, 150px);
	font-weight: 800;
	line-height: 1;
	color: transparent;
	background: linear-gradient(120deg, var(--ai-primary), var(--ai-accent));
	-webkit-background-clip: text;
	background-clip: text;
	-webkit-text-fill-color: transparent;
}

.error-404 p {
	color: var(--ai-muted);
	margin-bottom: 28px;
}

.error-actions {
	display: flex;
	justify-content: center;
	gap: 14px;
	flex-wrap: wrap;
	margin-bottom: 34px;
}

.inline-search {
	display: flex;
	gap: 10px;
	max-width: 520px;
	margin: 0 auto;
}

.inline-search input {
	flex: 1;
	padding: 13px 18px;
	color: var(--ai-text);
	background: rgba(255, 255, 255, .05);
	border: 1px solid var(--ai-border);
	border-radius: 999px;
}

.inline-search input:focus {
	outline: none;
	border-color: var(--ai-primary);
}

/* 评论 */
.comments-area {
	margin-top: 40px;
	padding: 34px;
	background: var(--ai-bg-card);
	border: 1px solid var(--ai-border);
	border-radius: 24px;
}

.comments-title,
.comment-reply-title {
	font-size: 20px;
	margin-bottom: 20px;
}

.comment-list {
	margin-bottom: 24px;
}

.comment-list li {
	padding: 18px 0;
	border-bottom: 1px dashed var(--ai-border);
}

.comment-list .children {
	margin-left: 40px;
	padding-top: 6px;
}

.comment-body {
	font-size: 14px;
}

.comment-author img {
	border-radius: 50%;
	float: left;
	margin: 0 12px 6px 0;
}

.comment-meta {
	margin-bottom: 8px;
	font-size: 13px;
	color: var(--ai-muted);
}

.comment-reply-link {
	font-size: 13px;
	color: var(--ai-primary);
}

.comment-form p {
	margin-bottom: 14px;
}

.comment-form label {
	display: block;
	margin-bottom: 6px;
	font-size: 13px;
	color: var(--ai-muted);
}

.comment-form input[type="text"],
.comment-form input[type="email"],
.comment-form input[type="url"],
.comment-form textarea {
	width: 100%;
	padding: 12px 16px;
	color: var(--ai-text);
	background: rgba(255, 255, 255, .04);
	border: 1px solid var(--ai-border);
	border-radius: 12px;
}

.comment-form input:focus,
.comment-form textarea:focus {
	outline: none;
	border-color: var(--ai-primary);
}

.comment-form .submit {
	width: auto;
	border: 0;
	cursor: pointer;
}

.no-comments {
	color: var(--ai-muted);
	font-size: 14px;
}

/* 短码联系块 */
.ai-contact-grid {
	display: grid;
	grid-template-columns: .8fr 1.2fr;
	gap: 36px;
}

/* ------------------------------------------------------------------
 * 响应式
 * ------------------------------------------------------------------ */
@media (max-width: 1080px) {
	.hero-inner {
		grid-template-columns: 1fr;
		gap: 48px;
	}

	.hero-visual {
		order: -1;
		min-height: 320px;
	}

	.solution-grid,
	.case-grid,
	.team-grid,
	.post-grid {
		grid-template-columns: repeat(2, 1fr);
	}

	.process-grid,
	.partners-grid {
		grid-template-columns: repeat(2, 1fr);
	}

	.process-item::after {
		display: none;
	}

	.page-body {
		grid-template-columns: 1fr;
	}

	.page-sidebar {
		position: static;
	}

	.footer-widgets {
		grid-template-columns: 1fr 1fr;
	}

	.contact-wrap,
	.ai-contact-grid {
		grid-template-columns: 1fr;
	}
}

@media (max-width: 900px) {
	.nav-toggle {
		display: flex;
	}

	.primary-nav {
		position: fixed;
		top: var(--ai-header-h);
		left: 0;
		right: 0;
		max-height: calc(100vh - var(--ai-header-h));
		padding: 16px 24px 28px;
		overflow-y: auto;
		background: rgba(6, 9, 18, .98);
		border-bottom: 1px solid var(--ai-border);
		transform: translateY(-12px);
		opacity: 0;
		visibility: hidden;
		transition: all .28s ease;
		backdrop-filter: blur(20px);
	}

	.primary-nav.is-open {
		transform: none;
		opacity: 1;
		visibility: visible;
	}

	.primary-nav .nav-menu {
		flex-direction: column;
		align-items: stretch;
		gap: 4px;
	}

	.primary-nav .menu-item > a {
		padding: 13px 14px;
		font-size: 16px;
	}

	.primary-nav .sub-menu {
		position: static;
		opacity: 1;
		visibility: visible;
		transform: none;
		box-shadow: none;
		background: transparent;
		border: 0;
		padding-left: 14px;
		margin-top: 4px;
	}

	.header-actions .btn {
		display: none;
	}
}

@media (max-width: 720px) {
	.container {
		padding: 0 18px;
	}

	.hero {
		padding: 56px 0 48px;
	}

	.float-card.card-a { left: 0; }
	.float-card.card-b { right: 0; }

	.stats-grid {
		grid-template-columns: repeat(2, 1fr);
		gap: 26px 12px;
	}

	.stat-item::after {
		display: none;
	}

	.section {
		padding: 60px 0;
	}

	.solution-grid,
	.case-grid,
	.team-grid,
	.post-grid,
	.process-grid,
	.partners-grid {
		grid-template-columns: 1fr;
	}

	.partners-grid {
		grid-template-columns: repeat(2, 1fr);
	}

	.footer-widgets {
		grid-template-columns: 1fr;
		gap: 30px;
	}

	.contact-wrap,
	.entry,
	.comments-area {
		padding: 24px 18px;
	}

	.field-row,
	.post-nav,
	.cta-inner {
		grid-template-columns: 1fr;
		flex-direction: column;
	}

	.cta-inner {
		display: flex;
		align-items: flex-start;
		text-align: left;
	}

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

	.inline-search {
		flex-direction: column;
	}

	.io-core {
		width: 300px;
		height: 300px;
		padding: 14px;
	}

	.io-node {
		min-width: 170px;
		padding: 11px 16px;
	}

	.back-to-top {
		right: 14px;
		bottom: 14px;
	}
}