/*
Theme Name: CyberNexus
Theme URI: https://example.com/cybernexus
Author: Trae AI
Author URI: https://example.com
Description: A modern, single-page WordPress theme for technology companies.
Version: 1.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: cyber-nexus
*/

:root {
	--cn-bg: #070913;
	--cn-text: #e2e8f0;
	--cn-accent: #5b7cfa; /* Blue */
	--cn-accent-glow: rgba(91, 124, 250, 0.5);
	--cn-secondary: #a0aec0;
	--cn-muted: #64748b;
	--cn-nav-bg: rgba(7, 9, 19, 0.85);
}

* {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}

html {
	scroll-behavior: smooth;
}

body {
	font-family: 'PingFang SC', 'Microsoft YaHei', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
	background-color: var(--cn-bg);
	color: var(--cn-text);
	line-height: 1.8;
	overflow-x: hidden;
	letter-spacing: 0.02em;
}

section {
	scroll-margin-top: 80px;
}

a {
	text-decoration: none;
	color: inherit;
	transition: color 0.3s ease;
}

ul {
	list-style: none;
}

/* Header */
.cn-header {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	z-index: 1000;
	background: rgba(7, 9, 19, 0.8);
	backdrop-filter: blur(10px);
	border-bottom: 1px solid rgba(255, 255, 255, 0.05);
	box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

.cn-header__inner {
	max-width: 1200px;
	margin: 0 auto;
	padding: 20px;
	display: flex;
	align-items: center;
	justify-content: space-between;
}

.cn-logo {
	font-size: 1.6rem;
	font-weight: 800;
	color: #fff;
	text-transform: uppercase;
	letter-spacing: 1px;
	background: linear-gradient(135deg, #fff 0%, #a0c4ff 100%);
	background-size: 200% auto;
	-webkit-background-clip: text;
	background-clip: text;
	-webkit-text-fill-color: transparent;
	text-shadow: 0 0 20px rgba(91, 124, 250, 0.3);
}

.cn-nav__list {
	display: flex;
	gap: 32px;
}

.cn-nav__link {
	font-size: 0.95rem;
	font-weight: 500;
	color: var(--cn-secondary);
	position: relative;
}

.cn-nav__link:hover {
	color: #fff;
	text-shadow: 0 0 8px var(--cn-accent-glow);
}

/* Mobile Nav Toggles */
.cn-nav__toggle, .cn-nav__btn {
	display: none;
}

/* Hero Section */
.cn-hero {
	height: 100vh;
	display: flex;
	align-items: center;
	justify-content: center;
	text-align: center;
	position: relative;
	overflow: hidden;
	padding-top: 80px;
	background-color: #050505; /* Fallback for canvas */
}

#hero-canvas {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	z-index: 1;
}

.cn-hero::before {
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background: radial-gradient(circle at center, rgba(16, 20, 40, 0) 0%, rgba(5, 5, 5, 0.8) 100%);
	z-index: 2;
	pointer-events: none;
}

.cn-hero__content {
	position: relative;
	z-index: 3;
	max-width: 800px;
	padding: 0 20px;
}

.cn-hero__title {
	font-size: 4rem;
	font-weight: 800;
	line-height: 1.1;
	margin: 0 0 24px;
	letter-spacing: -1px;
	background: linear-gradient(135deg, #ffffff 30%, var(--cn-accent) 100%);
	-webkit-background-clip: text;
	background-clip: text;
	color: transparent;
	text-shadow: 0 10px 30px rgba(91, 124, 250, 0.25);
}

.cn-hero__desc {
	font-size: 1.25rem;
	line-height: 1.6;
	color: var(--cn-muted);
	margin: 0 auto 40px;
	max-width: 600px;
}

.cn-hero__actions {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	gap: 20px;
}

/* Button Styles */
.cn-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	padding: 14px 32px;
	border-radius: 99px;
	font-size: 1rem;
	font-weight: 600;
	text-decoration: none;
	transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
	position: relative;
	overflow: hidden;
}

.cn-btn--primary {
	background: var(--cn-accent);
	color: #fff;
	box-shadow: 0 4px 20px rgba(91, 124, 250, 0.4);
	border: 2px solid transparent;
}

.cn-btn--primary:hover {
	transform: scale(1.05);
	background: #6f8bff;
	box-shadow: 0 8px 30px rgba(91, 124, 250, 0.6);
}

.cn-btn--outline {
	background: transparent;
	color: #fff;
	border: 2px solid var(--cn-accent);
	box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.cn-btn--outline:hover {
	background: rgba(91, 124, 250, 0.1);
	box-shadow: 0 0 15px rgba(91, 124, 250, 0.3);
}

/* About Section */
.cn-about {
	padding: 100px 20px;
	background: var(--cn-bg);
	text-align: left;
}

.cn-about__content {
	max-width: 900px;
	margin: 0 auto;
}

.cn-about__subtitle {
	font-size: 1.8rem;
	color: var(--cn-accent);
	margin-bottom: 25px;
	text-align: center;
}

.cn-about__text {
	font-size: 1.1rem;
	color: var(--cn-secondary);
	margin-bottom: 20px;
	line-height: 1.8;
}

.cn-about__block {
	margin-top: 50px;
	padding: 30px;
	background: rgba(255, 255, 255, 0.02);
	border: 1px solid rgba(255, 255, 255, 0.05);
	border-radius: 15px;
}

.cn-about__heading {
	font-size: 1.4rem;
	color: #fff;
	margin-bottom: 20px;
	border-left: 4px solid var(--cn-accent);
	padding-left: 15px;
}

.cn-about__list {
	list-style: none;
	margin-top: 20px;
}

.cn-about__list li {
	position: relative;
	padding-left: 25px;
	margin-bottom: 15px;
	color: var(--cn-secondary);
	font-size: 1.05rem;
}

.cn-about__list li::before {
	content: "\2022"; /* Bullet point */
	color: var(--cn-accent);
	font-weight: bold;
	display: inline-block;
	width: 1em;
	margin-left: -1em;
}

.cn-about__list li strong {
	color: #fff;
	font-weight: 600;
}

.cn-about__footer-text {
	font-size: 1.4rem;
	color: #fff;
	text-align: center;
	margin-top: 40px;
	font-weight: bold;
	letter-spacing: 1px;
}

/* Services Section */
.cn-services {
	position: relative;
	padding: 100px 20px;
	background: #0b0e1e;
	background: linear-gradient(180deg, var(--cn-bg) 0%, #0d1124 100%);
}

.cn-container {
	max-width: 1200px;
	margin: 0 auto;
}

.cn-section-title {
	font-size: 2.5rem;
	font-weight: 700;
	text-align: center;
	margin-bottom: 60px;
	position: relative;
	color: #fff;
}

.cn-section-title::after {
	content: "";
	display: block;
	width: 80px;
	height: 3px;
	background: linear-gradient(90deg, transparent, var(--cn-accent), transparent);
	margin: 16px auto 0;
	border-radius: 2px;
	box-shadow: 0 0 10px rgba(91, 124, 250, 0.5);
}

.cn-services__grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
	gap: 30px;
}

.cn-card {
	background: rgba(255, 255, 255, 0.02);
	border: 1px solid rgba(255, 255, 255, 0.05);
	border-radius: 20px;
	padding: 40px 30px;
	text-align: center;
	transition: all 0.4s ease;
	position: relative;
	overflow: hidden;
}

.cn-card:hover {
	transform: translateY(-10px);
	background: rgba(255, 255, 255, 0.04);
	border-color: rgba(91, 124, 250, 0.3);
	box-shadow: 
		0 20px 40px -10px rgba(0, 0, 0, 0.5),
		0 0 20px rgba(91, 124, 250, 0.1);
}

.cn-card::before {
	content: "";
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background: radial-gradient(circle at 50% 0%, rgba(91, 124, 250, 0.1), transparent 70%);
	opacity: 0;
	transition: opacity 0.4s ease;
	pointer-events: none;
}

.cn-card:hover::before {
	opacity: 1;
}

.cn-card__icon {
	font-size: 3rem;
	color: var(--cn-accent);
	margin-bottom: 24px;
	display: inline-block;
	width: 80px;
	height: 80px;
	line-height: 80px;
	border-radius: 50%;
	background: rgba(91, 124, 250, 0.1);
	transition: all 0.4s ease;
}

.cn-card:hover .cn-card__icon {
	transform: scale(1.1) rotate(5deg);
	background: var(--cn-accent);
	color: #fff;
	box-shadow: 0 0 20px rgba(91, 124, 250, 0.4);
}

.cn-card__title {
	font-size: 1.5rem;
	font-weight: 600;
	margin-bottom: 16px;
	color: #fff;
}

.cn-card__desc {
	font-size: 1rem;
	line-height: 1.6;
	color: var(--cn-muted);
	margin: 0;
}

/* 成功案例板块 - 赛博手风琴风格 */
.cn-portfolio {
	padding: 100px 0;
	background-color: #080a12;
	position: relative;
	overflow: hidden;
}

.cn-container-fluid {
	width: 100%;
	max-width: 1600px;
	margin: 0 auto;
	padding: 0 20px;
}

.cn-accordion {
	display: flex;
	height: 600px;
	gap: 20px;
	margin-top: 50px;
}

.cn-accordion__item {
	position: relative;
	flex: 1;
	border-radius: 30px;
	overflow: hidden;
	cursor: pointer;
	transition: all 0.6s cubic-bezier(0.25, 1, 0.5, 1);
	border: 1px solid rgba(255, 255, 255, 0.05);
	outline: none;
}

.cn-accordion__item:hover,
.cn-accordion__item:focus-within {
	flex: 3;
	border-color: rgba(91, 124, 250, 0.5);
	box-shadow: 0 0 30px rgba(91, 124, 250, 0.2);
}

.cn-accordion__bg {
	position: absolute;
	inset: 0;
	opacity: 0.8;
	transition: all 0.6s ease;
	z-index: 0;
}

.cn-accordion__item:hover .cn-accordion__bg {
	opacity: 1;
	transform: scale(1.05);
}

.cn-accordion__content {
	position: relative;
	z-index: 1;
	height: 100%;
	padding: 40px;
	display: flex;
	flex-direction: column;
	justify-content: flex-end;
	background: linear-gradient(to top, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0.4) 50%, transparent 100%);
}

.cn-accordion__icon {
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	font-size: 8rem;
	color: rgba(255, 255, 255, 0.1);
	transition: all 0.6s ease;
}

.cn-accordion__item:hover .cn-accordion__icon {
	top: 40px;
	left: 40px;
	transform: translate(0, 0) scale(0.5);
	color: rgba(91, 124, 250, 0.8);
}

.cn-accordion__info {
	opacity: 0;
	transform: translateY(20px);
	transition: all 0.5s ease 0.1s;
	display: flex;
	flex-direction: column;
	gap: 15px;
	min-width: 400px; /* Ensure content doesn't wrap awkwardly during animation */
}

.cn-accordion__item:hover .cn-accordion__info {
	opacity: 1;
	transform: translateY(0);
}

/* Default state: show only vertical title or simplified view */
.cn-accordion__item:not(:hover) .cn-accordion__info {
	/* Hide detailed info when not hovered */
	display: none; 
}

/* We need a visible title when not hovered. 
   Since structure is complex, let's use a trick or just rely on the expanded state for details.
   Better approach: Always show title, but animate its position.
*/

.cn-accordion__info {
	/* Reset for the animation logic above */
	display: flex; 
	opacity: 0; /* Hidden by default */
}

/* Re-implementing title visibility logic */
.cn-accordion__title {
	font-size: 2.5rem;
	font-weight: 700;
	color: #fff;
	margin: 0;
	white-space: nowrap;
}

.cn-accordion__category {
	color: var(--cn-accent);
	font-family: 'Courier New', monospace;
	font-size: 0.9rem;
	letter-spacing: 2px;
	text-transform: uppercase;
}

.cn-accordion__desc {
	color: rgba(255, 255, 255, 0.8);
	line-height: 1.6;
	max-width: 500px;
}

.cn-accordion__stats {
	display: flex;
	gap: 40px;
	margin-top: 20px;
	padding-top: 20px;
	border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.cn-stat {
	display: flex;
	flex-direction: column;
}

.cn-stat__value {
	font-size: 2rem;
	font-weight: 700;
	color: #fff;
	background: linear-gradient(to right, #fff, #a5b4fc);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.cn-stat__label {
	font-size: 0.8rem;
	color: rgba(255, 255, 255, 0.5);
	text-transform: uppercase;
}

.cn-accordion__link {
	margin-top: 20px;
	display: inline-flex;
	align-items: center;
	gap: 10px;
	color: var(--cn-accent);
	text-decoration: none;
	font-weight: 600;
	transition: gap 0.3s ease;
}

.cn-accordion__link:hover {
	gap: 15px;
}

/* Vertical Title for collapsed state */
.cn-accordion__item::after {
	content: attr(data-title); /* We need JS or manual CSS content */
	position: absolute;
	bottom: 40px;
	left: 50%;
	transform: translateX(-50%);
	color: #fff;
	font-size: 1.5rem;
	font-weight: 700;
	white-space: nowrap;
	opacity: 1;
	transition: opacity 0.3s ease;
	pointer-events: none;
	z-index: 2;
}

/* Manual content for titles since we can't easily use attr() with HTML content */
.cn-accordion__item:nth-child(1)::after { content: "蛎虾英语"; }
.cn-accordion__item:nth-child(2)::after { content: "阿尔法数理化"; }
.cn-accordion__item:nth-child(3)::after { content: "新黑板教学系统"; }

.cn-accordion__item:hover::after,
.cn-accordion__item:focus-within::after {
	opacity: 0;
}

.cn-accordion__info {
	opacity: 0;
	visibility: hidden; /* Ensure it doesn't take up space or overlap when hidden */
	transform: translateY(20px);
	transition: all 0.5s ease 0.1s;
	display: flex;
	flex-direction: column;
	gap: 15px;
	min-width: 400px;
}

.cn-accordion__item:hover .cn-accordion__info,
.cn-accordion__item:focus-within .cn-accordion__info {
	opacity: 1;
	visibility: visible;
	transform: translateY(0);
}

/* Default state: ensure strictly hidden */
.cn-accordion__item:not(:hover):not(:focus-within) .cn-accordion__info {
    display: none; 
}

/* Responsive */
@media (max-width: 1024px) {
    .cn-accordion {
        flex-direction: column;
        height: auto;
    }
    
    .cn-accordion__item {
        height: 300px; /* Fixed height for stacked items */
        flex: none; /* Disable flex growth on mobile */
    }
    
    .cn-accordion__item:hover,
    .cn-accordion__item:focus-within {
        flex: none;
        transform: scale(1.02);
    }
    
    .cn-accordion__info {
        opacity: 1;
        visibility: visible;
        display: flex; /* Ensure it's visible on mobile */
        transform: translateY(0);
        min-width: auto;
    }
    
    .cn-accordion__item::after {
        display: none; /* Hide the fallback title on mobile */
    }
    
    .cn-accordion__icon {
        top: 30px;
        left: auto;
        right: 30px;
        transform: none;
        font-size: 3rem;
    }
    
    .cn-accordion__item:hover .cn-accordion__icon,
    .cn-accordion__item:focus-within .cn-accordion__icon {
        top: 30px;
        left: auto;
        right: 30px;
        transform: none;
    }
}

/* Responsive */
@media (max-width: 1024px) {
	.cn-accordion {
		flex-direction: column;
		height: auto;
	}
	
	.cn-accordion__item {
		height: 300px; /* Fixed height for stacked items */
		flex: none; /* Disable flex growth on mobile */
	}
	
	.cn-accordion__item:hover {
		flex: none;
		transform: scale(1.02);
	}
	
	.cn-accordion__info {
		opacity: 1;
		transform: translateY(0);
		min-width: auto;
	}
	
	.cn-accordion__item::after {
		display: none; /* Hide the fallback title on mobile */
	}
	
	.cn-accordion__icon {
		top: 30px;
		left: auto;
		right: 30px;
		transform: none;
		font-size: 3rem;
	}
	
	.cn-accordion__item:hover .cn-accordion__icon {
		top: 30px;
		left: auto;
		right: 30px;
		transform: none;
	}
}

/* Contact Section */
.cn-contact {
	padding: 100px 20px;
	background: #0b0e1e;
	background: linear-gradient(180deg, #0d1124 0%, var(--cn-bg) 100%);
}

.cn-contact__cards {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
	gap: 30px;
	margin-bottom: 60px;
}

.cn-contact-card {
	background: rgba(255, 255, 255, 0.02);
	border: 1px solid rgba(255, 255, 255, 0.05);
	padding: 40px 30px;
	border-radius: 20px;
	text-align: center;
	transition: all 0.4s ease;
	position: relative;
	overflow: hidden;
}

.cn-contact-card:hover {
	background: rgba(255, 255, 255, 0.04);
	border-color: rgba(91, 124, 250, 0.3);
	transform: translateY(-10px);
	box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
}

.cn-contact-card__icon {
	width: 70px;
	height: 70px;
	margin: 0 auto 25px;
	background: rgba(91, 124, 250, 0.1);
	border-radius: 50%;
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 1.8rem;
	color: var(--cn-accent);
	transition: all 0.3s ease;
}

.cn-contact-card:hover .cn-contact-card__icon {
	background: var(--cn-accent);
	color: #fff;
	box-shadow: 0 0 20px rgba(91, 124, 250, 0.5);
}

.cn-contact-card__title {
	font-size: 1.4rem;
	margin-bottom: 15px;
	color: #fff;
}

.cn-contact-card__text {
	color: var(--cn-secondary);
	margin-bottom: 25px;
	font-size: 1rem;
}

.cn-contact-card__link {
	display: inline-flex;
	align-items: center;
	gap: 10px;
	color: var(--cn-accent);
	font-weight: 500;
	transition: gap 0.3s ease;
}

.cn-contact-card__link:hover {
	gap: 15px;
	color: #fff;
}

.cn-contact__social {
	display: flex;
	justify-content: center;
	gap: 30px;
    margin-top: 40px;
}

.cn-social-item {
    position: relative;
}

.cn-social-link {
	width: 60px;
	height: 60px;
	border-radius: 50%;
	background: rgba(255, 255, 255, 0.05);
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 1.5rem;
	color: var(--cn-text);
	border: 1px solid rgba(255, 255, 255, 0.1);
	transition: all 0.3s ease;
    cursor: pointer;
    outline: none;
}

.cn-social-link:hover,
.cn-social-link:focus {
	background: var(--cn-accent);
	border-color: var(--cn-accent);
	color: #fff;
	transform: translateY(-5px);
	box-shadow: 0 10px 20px rgba(91, 124, 250, 0.3);
}

/* QR Code Popup */
.cn-social-qr {
    position: absolute;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    width: 180px;
    background: #fff;
    padding: 15px;
    border-radius: 10px;
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.27, 1.55);
    z-index: 100;
    pointer-events: none;
    text-align: center;
}

.cn-social-qr.active,
.cn-social-item:hover .cn-social-qr,
.cn-social-item:focus-within .cn-social-qr {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}

/* Arrow for popup */
.cn-social-qr::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    border-width: 8px 8px 0;
    border-style: solid;
    border-color: #fff transparent transparent transparent;
}

.cn-social-qr img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 5px;
}

.cn-social-qr__text {
    display: block;
    margin-top: 10px;
    font-size: 0.85rem;
    color: #333;
    font-weight: 600;
}

/* Responsive adjustments */
@media (max-width: 768px) {
	.cn-nav__toggle { display: none; }
	.cn-nav__btn {
		display: block;
		cursor: pointer;
		z-index: 1001;
	}
	.cn-nav__bar {
		display: block;
		width: 25px;
		height: 2px;
		margin: 5px auto;
		background-color: #fff;
		transition: all 0.3s ease;
	}
	.cn-nav {
		position: fixed;
		top: 0;
		right: -100%;
		width: 70%;
		height: 100vh;
		background: #0f1221;
		padding-top: 80px;
		transition: right 0.3s ease;
		box-shadow: -5px 0 15px rgba(0,0,0,0.5);
	}
	.cn-nav__list {
		flex-direction: column;
		align-items: center;
		gap: 40px;
	}
	#cn-nav-toggle:checked ~ .cn-nav { right: 0; }
	#cn-nav-toggle:checked ~ .cn-nav__btn .cn-nav__bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
	#cn-nav-toggle:checked ~ .cn-nav__btn .cn-nav__bar:nth-child(2) { opacity: 0; }
	#cn-nav-toggle:checked ~ .cn-nav__btn .cn-nav__bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

	.cn-hero__title {
		font-size: 2.5rem;
	}
	.cn-hero__desc {
		font-size: 1.1rem;
	}
	.cn-hero {
		min-height: auto;
		padding: 120px 20px 80px;
	}

	/* Portfolio Mobile */
	.cn-project__info {
		transform: translateY(0);
	}
	.cn-project__desc {
		opacity: 1;
		transform: translateY(0);
		display: block; /* Ensure it's visible */
	}
	.cn-project__overlay {
		background: linear-gradient(to top, rgba(7, 9, 19, 0.95) 0%, rgba(7, 9, 19, 0.6) 50%, transparent 100%);
	}

	/* Contact Mobile */
	.cn-contact__cards {
		gap: 20px;
	}
}

/* Footer */
.cn-footer {
	background: #05070e;
	padding: 40px 20px;
	text-align: center;
	border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.cn-copyright {
	color: var(--cn-secondary);
	font-size: 0.9rem;
	margin-bottom: 10px;
}

.cn-icp {
	color: var(--cn-muted);
	font-size: 0.8rem;
}

.cn-icp a {
	color: inherit;
	text-decoration: none;
	transition: color 0.3s ease;
}

.cn-icp a:hover {
	color: var(--cn-accent);
}