/* 
 * SSPU Programming Contest Association Design System
 * Author: Antigravity
 * School: Shanghai Second Polytechnic University (上海第二工业大学)
 */

/* Google Fonts loaded via <link> in each HTML head (parallel, non-blocking chain) */

/* --- Root variables and themes --- */
:root {
    /* Color Palette */
    --sspu-blue-base: 217, 91%, 60%; /* #3b82f6 equivalent HSL */
    --sspu-green-base: 161, 84%, 48%; /* #10b981 equivalent HSL */
    
    --transition-speed: 0.3s;
    --border-radius-sm: 8px;
    --border-radius-md: 16px;
    --border-radius-lg: 24px;
    --max-width: 1280px;

    /* Font Setup */
    --font-primary: 'Plus Jakarta Sans', 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

/* Dark Theme (Default) */
[data-theme="dark"], :root:not([data-theme="light"]) {
    --bg-color: #090d16;
    --bg-grid-color: rgba(59, 130, 246, 0.03);
    --card-bg: rgba(17, 24, 39, 0.7);
    --card-bg-hover: rgba(23, 31, 50, 0.85);
    --navbar-bg: rgba(9, 13, 22, 0.8);
    --text-color: #f8fafc;
    --text-muted: #94a3b8;
    --primary-color: hsl(var(--sspu-blue-base));
    --primary-glow: rgba(59, 130, 246, 0.5);
    --accent-color: hsl(var(--sspu-green-base));
    --accent-glow: rgba(16, 185, 129, 0.4);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(59, 130, 246, 0.3);
    --shadow-color: rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 25px rgba(59, 130, 246, 0.15);
    --input-bg: rgba(15, 23, 42, 0.8);
    --visualizer-bar-bg: #1e293b;
    --visualizer-bar-active: hsl(var(--sspu-green-base));
    --visualizer-bar-compare: #e11d48;
}

/* Light Theme */
[data-theme="light"] {
    --bg-color: #f8fafc;
    --bg-grid-color: rgba(29, 78, 216, 0.02);
    --card-bg: rgba(255, 255, 255, 0.8);
    --card-bg-hover: rgba(255, 255, 255, 0.95);
    --navbar-bg: rgba(248, 250, 252, 0.85);
    --text-color: #0f172a;
    --text-muted: #64748b;
    --primary-color: #1d4ed8; /* Darker SSPU Blue for contrast */
    --primary-glow: rgba(29, 78, 216, 0.2);
    --accent-color: #059669; /* Darker green */
    --accent-glow: rgba(5, 150, 105, 0.25);
    --border-color: rgba(15, 23, 42, 0.08);
    --border-hover: rgba(29, 78, 216, 0.3);
    --shadow-color: rgba(15, 23, 42, 0.06);
    --shadow-glow: 0 15px 30px rgba(29, 78, 216, 0.05);
    --input-bg: #ffffff;
    --visualizer-bar-bg: #e2e8f0;
    --visualizer-bar-active: #059669;
    --visualizer-bar-compare: #dc2626;
}

html {
    overflow-x: hidden;
}

/* --- Reset & Global styles --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
    /* Grid background effect */
    background-image: 
        linear-gradient(var(--bg-grid-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--bg-grid-color) 1px, transparent 1px);
    background-size: 50px 50px;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-speed) ease;
}

img {
    max-width: 100%;
    height: auto;
}

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.25;
}

.section-title {
    font-size: 2.25rem;
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    background: linear-gradient(135deg, var(--text-color) 30%, var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    margin: 0.75rem auto 0;
    border-radius: 2px;
}

/* --- Reusable Components --- */

/* Glassmorphism card */
.glass-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 2rem;
    box-shadow: 0 8px 32px 0 var(--shadow-color);
    backdrop-filter: blur(12px) saturate(180%);
    -webkit-backdrop-filter: blur(12px) saturate(180%);
    transition: transform 0.4s cubic-bezier(0.165, 0.84, 0.44, 1),
                border-color var(--transition-speed) ease,
                box-shadow 0.4s ease;
}

.glass-card:hover {
    transform: translateY(-5px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-glow);
    background: var(--card-bg-hover);
}

/* Modern Button */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-speed) cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    outline: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), #2563eb);
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.5);
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
}

.btn-secondary {
    background: transparent;
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

/* Header & Navbar */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: all 0.4s ease;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    transition: padding 0.4s ease;
    position: relative;
}

header.scrolled {
    background: var(--navbar-bg);
    box-shadow: 0 4px 30px var(--shadow-color);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
}

header.scrolled .navbar {
    padding: 12px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: 0.5px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo img {
    height: 40px;
    width: auto;
    filter: drop-shadow(0 0 8px var(--primary-glow));
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

@media (min-width: 769px) {
    .nav-menu {
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
    }
}

.nav-link {
    font-weight: 500;
    font-size: 0.95rem;
    padding: 6px 12px;
    border-radius: var(--border-radius-sm);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 12px;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transition: width var(--transition-speed) ease;
}

.nav-link:hover, .nav-link.active {
    color: var(--primary-color);
}

.nav-link:hover::after, .nav-link.active::after {
    width: calc(100% - 24px);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

/* Theme Toggle Button */
.theme-toggle-btn {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.25rem;
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    transition: all var(--transition-speed) ease;
}

.theme-toggle-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: rgba(59, 130, 246, 0.05);
}

.theme-toggle-btn .fa-sun {
    display: none;
}

[data-theme="light"] .theme-toggle-btn .fa-sun {
    display: block;
}

[data-theme="light"] .theme-toggle-btn .fa-moon {
    display: none;
}

/* Mobile Nav Toggle */
.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero-section {
    padding-top: 160px;
    padding-bottom: 80px;
    min-height: 90vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 4rem;
    align-items: center;
}

.hero-text h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 1.5rem;
}

.hero-text h1 span {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-text p {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 550px;
}

.hero-cta {
    display: flex;
    gap: 1rem;
}

.hero-media {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image-wrapper {
    position: relative;
    width: 100%;
    max-width: 480px;
    height: 480px;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 50px var(--shadow-color);
}

/* Slideshow */
.slideshow-container {
    width: 100%;
    height: 100%;
    position: relative;
}

.slide {
    display: none;
    width: 100%;
    height: 100%;
}

.slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.fade {
    animation-name: fadeEffect;
    animation-duration: 1.5s;
}

@keyframes fadeEffect {
    from { opacity: 0.4 }
    to { opacity: 1 }
}

.dots-container {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 10;
}

.dot {
    cursor: pointer;
    height: 10px;
    width: 10px;
    background-color: rgba(255, 255, 255, 0.4);
    border-radius: 50%;
    display: inline-block;
    transition: background-color 0.6s ease, transform 0.3s ease;
}

.dot.active, .dot:hover {
    background-color: #ffffff;
    transform: scale(1.2);
}

/* Floating Code Snippets */
.floating-code {
    position: absolute;
    background: rgba(15, 23, 42, 0.85);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 12px 18px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.85rem;
    color: var(--accent-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    pointer-events: none;
    backdrop-filter: blur(8px);
    z-index: 1;
}

.floating-code-1 {
    top: 5%;
    right: -15%;
    animation: floatAnim 6s ease-in-out infinite;
}

.floating-code-2 {
    bottom: 20%;
    left: -15%;
    color: var(--primary-color);
    animation: floatAnim 8s ease-in-out infinite 1s;
}

.floating-code-3 {
    bottom: -10%;
    right: 10%;
    color: #e11d48;
    animation: floatAnim 7s ease-in-out infinite 2s;
}

@keyframes floatAnim {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

/* Stats Section */
.stats-section {
    padding: 60px 0;
    position: relative;
    z-index: 10;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.stat-card {
    text-align: center;
    padding: 2.5rem 1.5rem;
}

.stat-card i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    filter: drop-shadow(0 0 8px var(--primary-glow));
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--text-color), var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-label {
    font-size: 0.95rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Mission / Core Features Section */
.mission-section {
    padding: 100px 0;
}

.mission-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
}

.mission-card {
    position: relative;
    overflow: hidden;
}

.mission-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--border-radius-sm);
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.mission-card:nth-child(2) .mission-icon {
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent-color);
    border-color: rgba(16, 185, 129, 0.2);
}

.mission-card:nth-child(3) .mission-icon {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border-color: rgba(239, 68, 68, 0.2);
}

.mission-card h3 {
    font-size: 1.35rem;
    margin-bottom: 1rem;
}

.mission-card p {
    color: var(--text-muted);
}

/* Algorithm Visualizer Playground */
.playground-section {
    padding: 80px 0;
}

.playground-container {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 2.5rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: 0 20px 40px var(--shadow-color);
}

.visualizer-pane {
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
}

.visualizer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.visualizer-title h3 {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}

.visualizer-title p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.visualizer-controls {
    display: flex;
    gap: 10px;
}

.control-btn {
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 8px 16px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.85rem;
    transition: all var(--transition-speed) ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

.control-btn:hover {
    border-color: var(--primary-color);
    background: var(--primary-glow);
}

.control-btn.active {
    background: var(--primary-color);
    color: #ffffff;
    border-color: var(--primary-color);
}

.visualizer-canvas-wrapper {
    flex-grow: 1;
    min-height: 280px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: flex-end;
    justify-content: space-evenly;
    padding: 24px;
    position: relative;
}

.visualizer-bar {
    background-color: var(--visualizer-bar-bg);
    border-radius: 4px 4px 0 0;
    transition: height 0.1s ease, background-color var(--transition-speed) ease;
    width: 6%;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: 700;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding-bottom: 8px;
}

.visualizer-bar.active {
    background-color: var(--visualizer-bar-active) !important;
    box-shadow: 0 0 10px var(--accent-glow);
}

.visualizer-bar.comparing {
    background-color: var(--visualizer-bar-compare) !important;
}

.visualizer-settings {
    margin-top: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.settings-group {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.settings-group label {
    font-weight: 500;
}

.settings-group input[type="range"] {
    appearance: none;
    -webkit-appearance: none;
    width: 120px;
    height: 4px;
    border-radius: 2px;
    background: var(--border-color);
    outline: none;
}

.settings-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    box-shadow: 0 0 8px var(--primary-glow);
    transition: transform var(--transition-speed) ease;
}

.settings-group input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

/* Code Tracking Pane */
.code-pane {
    background: rgba(15, 23, 42, 0.6);
    border-left: 1px solid var(--border-color);
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
}

.code-pane h4 {
    font-size: 1.15rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.code-block {
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.85rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
    color: var(--text-muted);
    flex-grow: 1;
}

.code-line {
    padding: 2px 8px;
    border-radius: 4px;
    transition: all 0.15s ease;
}

.code-line.highlight {
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent-color);
    border-left: 3px solid var(--accent-color);
    padding-left: 5px;
}

.code-explanation {
    font-size: 0.85rem;
    color: var(--text-muted);
    background: rgba(0, 0, 0, 0.2);
    padding: 12px;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
}

/* Competition Section */
.competition-section {
    padding: 100px 0;
}

.competition-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
}

.competition-card {
    display: flex;
    gap: 1.5rem;
}

.comp-badge {
    width: 80px;
    height: 80px;
    border-radius: var(--border-radius-md);
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.comp-badge img {
    width: 70%;
    height: 70%;
    object-fit: contain;
    filter: drop-shadow(0 2px 5px rgba(0, 0, 0, 0.2));
}

.comp-info {
    flex-grow: 1;
}

.comp-info h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.comp-info h3 span {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 12px;
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-color);
    border: 1px solid rgba(59, 130, 246, 0.15);
}

.comp-info p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 0.75rem;
}

.comp-links {
    display: flex;
    gap: 15px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary-color);
}

.comp-links a:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

/* News Section */
.news-section {
    padding: 80px 0;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.news-card {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.news-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.news-tag {
    font-weight: 700;
    color: var(--primary-color);
    text-transform: uppercase;
}

.news-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    line-height: 1.35;
}

.news-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.news-readmore {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 6px;
    align-self: flex-start;
}

.news-readmore:hover {
    color: var(--accent-color);
}

.news-readmore i {
    transition: transform var(--transition-speed) ease;
}

.news-readmore:hover i {
    transform: translateX(4px);
}

/* Footer Section */
footer {
    background: var(--navbar-bg);
    border-top: 1px solid var(--border-color);
    padding: 80px 0 30px;
    position: relative;
    z-index: 10;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr repeat(3, 1fr);
    gap: 3rem;
    margin-bottom: 50px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-brand .logo {
    align-self: flex-start;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.95rem;
    max-width: 300px;
}

.footer-col h4 {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    position: relative;
}

.footer-col h4::after {
    content: '';
    display: block;
    width: 30px;
    height: 2px;
    background: var(--primary-color);
    margin-top: 6px;
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-col a {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.footer-col a:hover {
    color: var(--primary-color);
    padding-left: 4px;
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: all var(--transition-speed) ease;
}

.social-btn:hover {
    color: #ffffff;
    background: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(59, 130, 246, 0.3);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Floating Join Us button */
.floating-join {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 700;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    cursor: pointer;
    z-index: 999;
    border: 2px solid rgba(255, 255, 255, 0.2);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.3s ease;
    text-align: center;
    line-height: 1.2;
}

.floating-join:hover {
    transform: scale(1.1);
    box-shadow: 0 12px 30px rgba(59, 130, 246, 0.4);
}

.floating-join .join-qrcode-popup {
    position: absolute;
    bottom: 85px;
    right: 0;
    width: 220px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 20px;
    box-shadow: 0 15px 35px var(--shadow-color);
    backdrop-filter: blur(16px);
    opacity: 0;
    visibility: hidden;
    transform: translateY(15px);
    transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
    color: var(--text-color);
}

.floating-join:hover .join-qrcode-popup {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.join-qrcode-popup svg, .join-qrcode-popup img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius-sm);
    margin-bottom: 12px;
    background: #ffffff;
    padding: 8px;
    border: 1px solid var(--border-color);
}

.join-qrcode-popup p {
    font-size: 0.85rem;
    font-weight: 600;
    margin: 0;
}

.join-qrcode-popup span {
    font-size: 0.75rem;
    color: var(--text-muted);
}


/* --- ABOUT PAGE SPECIFIC STYLES --- */
.about-section {
    padding-top: 150px;
    padding-bottom: 80px;
}

.about-intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    margin-bottom: 80px;
}

.about-intro-text p {
    color: var(--text-muted);
    font-size: 1.05rem;
    margin-bottom: 1.5rem;
}

.about-intro-visual {
    position: relative;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    aspect-ratio: 16/10;
    background: var(--card-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 15px 30px var(--shadow-color);
}

.about-intro-visual i {
    font-size: 6rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 15px var(--primary-glow));
    animation: pulse-glow 2s infinite alternate;
}

@keyframes pulse-glow {
    0% { transform: scale(1); filter: drop-shadow(0 0 10px var(--primary-glow)); }
    100% { transform: scale(1.05); filter: drop-shadow(0 0 25px var(--primary-glow)); }
}

/* Learning Roadmap Timeline */
.roadmap-section {
    padding: 80px 0;
}

.roadmap-timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 0;
}

.roadmap-timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 2px;
    background: linear-gradient(180deg, var(--primary-color), var(--accent-color));
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    width: 50%;
    padding: 0 40px;
    margin-bottom: 50px;
}

.timeline-item:nth-child(odd) {
    left: 0;
    text-align: right;
}

.timeline-item:nth-child(even) {
    left: 50%;
    text-align: left;
}

.timeline-dot {
    position: absolute;
    top: 8px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--bg-color);
    border: 4px solid var(--primary-color);
    z-index: 10;
}

.timeline-item:nth-child(odd) .timeline-dot {
    right: -10px;
}

.timeline-item:nth-child(even) .timeline-dot {
    left: -10px;
    border-color: var(--accent-color);
}

.timeline-content {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 1.5rem;
    box-shadow: 0 8px 20px var(--shadow-color);
    backdrop-filter: blur(8px);
}

.timeline-content h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.timeline-item:nth-child(even) .timeline-content h3 {
    color: var(--accent-color);
}

.timeline-content p {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.timeline-resources {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: flex-end;
}

.timeline-item:nth-child(even) .timeline-resources {
    justify-content: flex-start;
}

.resource-tag {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: 4px;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
}


/* --- HALL OF FAME STYLES --- */
.fame-section {
    padding-top: 60px;
    padding-bottom: 80px;
}

.awards-showcase {
    margin-bottom: 80px;
}

.awards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
}

.award-card {
    text-align: center;
    padding: 3rem 2rem;
}

.award-card .trophy-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    display: inline-block;
}

.award-card.gold .trophy-icon {
    color: #f59e0b;
    filter: drop-shadow(0 0 12px rgba(245, 158, 11, 0.4));
}

.award-card.silver .trophy-icon {
    color: #94a3b8;
    filter: drop-shadow(0 0 12px rgba(148, 163, 184, 0.4));
}

.award-card.bronze .trophy-icon {
    color: #b45309;
    filter: drop-shadow(0 0 12px rgba(180, 83, 9, 0.4));
}

.award-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.award-card h4 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.award-card p {
    font-size: 0.95rem;
    color: var(--text-muted);
}

.alumni-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.alumni-card {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100%;
}

.alumni-card > div:last-child {
    margin-top: auto;
    width: 100%;
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.alumni-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: var(--input-bg);
    border: 2px solid var(--border-color);
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--text-muted);
    overflow: hidden;
    position: relative;
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

.alumni-avatar i {
    position: absolute;
    bottom: 0;
    transform: translateY(5px);
}

.alumni-card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.25rem;
}

.alumni-title {
    font-size: 0.85rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.alumni-dest {
    font-size: 0.85rem;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 12px;
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent-color);
    display: inline-block;
}


/* --- NEWS PAGE STYLES --- */
.news-page-section {
    padding-top: 150px;
    padding-bottom: 80px;
}

.news-filters {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 3rem;
}

.filter-btn {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 10px 24px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-weight: 600;
    transition: all var(--transition-speed) ease;
}

.filter-btn:hover, .filter-btn.active {
    background: var(--primary-color);
    color: #ffffff;
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}


/* --- HIGHLIGHT AWARDS STYLES --- */
.highlight-awards-section {
    padding-top: 150px;
    padding-bottom: 60px;
}

.highlight-awards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
    margin-top: 2rem;
}

.highlight-award-card {
    padding: 0 !important;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    height: 100%;
}

.highlight-award-img-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    border-bottom: 1px solid var(--border-color);
}

.highlight-award-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.highlight-award-card:hover .highlight-award-img {
    transform: scale(1.05);
}

.highlight-award-content {
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    flex-grow: 1;
}

.highlight-award-badge {
    align-self: flex-start;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    gap: 6px;
    letter-spacing: 0.5px;
}

.badge-bronze {
    background: rgba(245, 158, 11, 0.12);
    color: #f59e0b;
    border: 1px solid rgba(245, 158, 11, 0.25);
}
[data-theme="light"] .badge-bronze {
    background: rgba(180, 83, 9, 0.08);
    color: #b45309;
    border: 1px solid rgba(180, 83, 9, 0.18);
}

.badge-invitational {
    background: rgba(59, 130, 246, 0.12);
    color: #60a5fa;
    border: 1px solid rgba(59, 130, 246, 0.25);
}
[data-theme="light"] .badge-invitational {
    background: rgba(29, 78, 216, 0.08);
    color: #1d4ed8;
    border: 1px solid rgba(29, 78, 216, 0.18);
}

.badge-silver {
    background: rgba(148, 163, 184, 0.15);
    color: #cbd5e1;
    border: 1px solid rgba(148, 163, 184, 0.3);
}
[data-theme="light"] .badge-silver {
    background: rgba(71, 85, 105, 0.08);
    color: #475569;
    border: 1px solid rgba(71, 85, 105, 0.18);
}

.badge-bronze-inv {
    background: rgba(249, 115, 22, 0.12);
    color: #fb923c;
    border: 1px solid rgba(249, 115, 22, 0.25);
}
[data-theme="light"] .badge-bronze-inv {
    background: rgba(234, 88, 12, 0.08);
    color: #c2410c;
    border: 1px solid rgba(234, 88, 12, 0.18);
}

.highlight-award-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.badge-first-solve {
    background: rgba(234, 179, 8, 0.15);
    color: #facc15;
    border: 1px solid rgba(234, 179, 8, 0.3);
}
[data-theme="light"] .badge-first-solve {
    background: rgba(202, 138, 4, 0.08);
    color: #a16207;
    border: 1px solid rgba(202, 138, 4, 0.18);
}

.badge-honorable {
    background: rgba(148, 163, 184, 0.12);
    color: #94a3b8;
    border: 1px solid rgba(148, 163, 184, 0.25);
}
[data-theme="light"] .badge-honorable {
    background: rgba(100, 116, 139, 0.08);
    color: #64748b;
    border: 1px solid rgba(100, 116, 139, 0.18);
}

.highlight-award-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.4;
    color: var(--text-color);
}

.highlight-award-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
    flex-grow: 1;
}

.highlight-award-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    padding-top: 0.75rem;
    margin-top: 0.5rem;
}

.highlight-award-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Alumni Github Button */
.alumni-github-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    border-radius: var(--border-radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    background: rgba(255, 255, 255, 0.03);
    transition: all var(--transition-speed) ease;
    margin-top: 15px;
}

.alumni-github-btn:hover {
    border-color: var(--primary-color);
    background: rgba(59, 130, 246, 0.08);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(59, 130, 246, 0.2);
    color: var(--primary-color);
}

/* Alumni Codeforces Button */
.alumni-codeforces-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    border-radius: var(--border-radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    background: rgba(255, 255, 255, 0.03);
    transition: all var(--transition-speed) ease;
    margin-top: 15px;
}

.alumni-codeforces-btn:hover {
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.08);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(239, 68, 68, 0.25);
    color: #ef4444;
}

/* --- RESPONSIVE DESIGN --- */
@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
        text-align: center;
    }
    
    .hero-text p {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-image-wrapper {
        max-width: 400px;
        height: 400px;
    }

    .floating-code {
        display: none;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .mission-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .playground-container {
        grid-template-columns: 1fr;
    }
    
    .code-pane {
        border-left: none;
        border-top: 1px solid var(--border-color);
    }
    
    .competition-grid {
        grid-template-columns: 1fr;
    }
    
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-intro-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
    
    .awards-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .alumni-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .highlight-awards-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .highlight-award-card {
        flex-direction: row !important;
        height: auto;
    }

    .highlight-award-img-wrapper {
        width: 30%;
        min-width: 30%;
        aspect-ratio: unset;
        border-bottom: none;
        border-right: 1px solid var(--border-color);
    }

    .highlight-award-content {
        width: 70%;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--bg-color);
        flex-direction: column;
        align-items: center;
        padding-top: 3rem;
        gap: 2rem;
        transition: left 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
        border-top: 1px solid var(--border-color);
        z-index: 999;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .mobile-nav-toggle {
        display: block;
    }
    
    .hero-text h1 {
        font-size: 2.5rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .roadmap-timeline::before {
        left: 24px;
    }
    
    .timeline-item {
        width: 100%;
        padding-left: 54px;
        padding-right: 0;
        text-align: left !important;
    }
    
    .timeline-item:nth-child(even) {
        left: 0;
    }
    
    .timeline-dot {
        left: 14px !important;
        right: auto !important;
    }
    
    .timeline-resources {
        justify-content: flex-start !important;
    }
    
    .awards-grid {
        grid-template-columns: 1fr;
    }
    
    .alumni-grid {
        grid-template-columns: 1fr;
    }

    .highlight-awards-section {
        padding-top: 110px;
        padding-bottom: 30px;
    }

    /* Vertical stacked card layout on mobile */
    .highlight-awards-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .highlight-award-card {
        flex-direction: column !important;
        height: auto;
    }

    .highlight-award-img-wrapper {
        width: 100% !important;
        min-width: 100% !important;
        aspect-ratio: 16 / 10 !important;
        border-right: none !important;
        border-bottom: 1px solid var(--border-color) !important;
    }

    .highlight-award-content {
        width: 100% !important;
    }

    .highlight-award-desc {
        font-size: 0.72rem;
        line-height: 1.45;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .highlight-award-badge {
        font-size: 0.6rem;
        padding: 2px 6px;
    }

    .highlight-award-meta {
        font-size: 0.65rem;
        gap: 3px;
        padding-top: 0.4rem;
        margin-top: 0.2rem;
    }

    /* --- ALUMNI CARD MOBILE FIXES (768px) --- */

    .alumni-card p {
        white-space: normal !important;
        font-size: 0.75rem !important;
        padding-left: 6px !important;
        line-height: 1.8 !important;
    }

    .alumni-card h3 {
        font-size: 1.05rem;
        line-height: 1.6;
    }

    .alumni-card h3 span {
        display: block !important;
        margin-left: 0 !important;
        margin-top: 6px;
        font-size: 0.7rem !important;
    }

    .alumni-card.glass-card {
        padding: 1.5rem 1.2rem !important;
    }

    .alumni-avatar {
        width: 80px;
        height: 80px;
        margin-bottom: 1rem;
    }

    .alumni-title {
        font-size: 0.8rem;
        margin-bottom: 10px !important;
    }

    .alumni-codeforces-btn,
    .alumni-github-btn {
        font-size: 0.78rem;
        padding: 5px 12px;
        margin-top: 10px !important;
    }

    .roadmap-section {
        padding: 50px 0 !important;
    }

    .section-title {
        font-size: 1.8rem;
    }
}

/* --- EXTRA SMALL DEVICES (480px and below) --- */
@media (max-width: 480px) {
    .highlight-awards-section {
        padding-top: 95px;
        padding-bottom: 20px;
    }



    .highlight-award-card h3 {
        font-size: 0.82rem;
    }

    .highlight-award-desc {
        font-size: 0.68rem;
        -webkit-line-clamp: 2;
    }

    .highlight-award-badge {
        font-size: 0.55rem;
        padding: 2px 5px;
    }

    .highlight-award-meta {
        font-size: 0.6rem;
    }

    /* Alumni cards extra-small adjustments */
    .alumni-card.glass-card {
        padding: 1.2rem 1rem !important;
        max-width: 100% !important;
    }

    .alumni-card h3 {
        font-size: 0.95rem;
    }

    .alumni-card h3 span {
        font-size: 0.65rem !important;
        padding: 2px 6px !important;
    }

    .alumni-card p {
        font-size: 0.72rem !important;
        line-height: 1.7 !important;
    }

    .alumni-avatar {
        width: 70px;
        height: 70px;
    }

    .alumni-grid {
        gap: 1.2rem !important;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .footer-grid {
        gap: 1.5rem;
    }
}

/* --- Outstanding Alumni Grid Layout Fixes --- */
.outstanding-alumni-grid {
    display: grid !important;
    grid-template-columns: repeat(3, 1fr) !important;
    grid-auto-rows: 1fr !important;
    gap: 2.5rem !important;
    justify-items: center !important;
}

@media (max-width: 1024px) {
    .outstanding-alumni-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 2rem !important;
        justify-items: center !important;
    }
}

@media (max-width: 768px) {
    .outstanding-alumni-grid {
        grid-template-columns: 1fr !important;
        grid-auto-rows: auto !important;
        gap: 1.5rem !important;
        justify-items: center !important;
    }
}


/* --- ABOUT PAGE SPECIFIC IMAGE STYLES --- */
.about-intro-visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.about-intro-visual:hover img {
    transform: scale(1.05);
}

/* --- XCPC 2x2 IMAGE GALLERY GRID --- */
.image-gallery-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
    width: 100%;
    max-width: 550px;
    margin: 0 auto;
}

.image-gallery-grid img {
    width: 100%;
    aspect-ratio: 1.1;
    object-fit: cover;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 25px var(--shadow-color);
    transition: transform 0.6s cubic-bezier(0.165, 0.84, 0.44, 1), box-shadow 0.6s ease;
}

.image-gallery-grid img:hover {
    transform: translateY(-8px) scale(1.03);
    box-shadow: 0 15px 30px rgba(59, 130, 246, 0.25);
    border-color: var(--primary-color);
}

/* --- XCPC TIMELINE STYLES --- */
.xcpc-timeline {
    position: relative;
    max-width: 850px;
    margin: 3rem auto 0;
    padding: 20px 0;
}

.xcpc-timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 2px;
    background: linear-gradient(180deg, var(--primary-color), var(--accent-color));
    transform: translateX(-50%);
}

.xcpc-timeline-item {
    position: relative;
    width: 50%;
    padding: 0 35px;
    margin-bottom: 40px;
    box-sizing: border-box;
}

.xcpc-timeline-item:nth-child(odd) {
    left: 0;
    text-align: right;
}

.xcpc-timeline-item:nth-child(even) {
    left: 50%;
    text-align: left;
}

.xcpc-timeline-date {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent-color);
    margin-bottom: 0.5rem;
    text-shadow: 0 0 10px rgba(59, 130, 246, 0.2);
}

.xcpc-timeline-content {
    padding: 1.5rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 25px var(--shadow-color);
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.xcpc-timeline-content:hover {
    transform: translateY(-3px);
    border-color: var(--primary-color);
}

.xcpc-timeline-content h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.xcpc-timeline-content p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin: 0;
}

.xcpc-timeline-dot {
    position: absolute;
    top: 10px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-color);
    border: 3px solid var(--bg-color);
    box-shadow: 0 0 10px var(--accent-color);
    z-index: 2;
}

.xcpc-timeline-item:nth-child(odd) .xcpc-timeline-dot {
    right: -8px;
}

.xcpc-timeline-item:nth-child(even) .xcpc-timeline-dot {
    left: -8px;
}

/* --- FAQ ACCORDION STYLES --- */
.faq-container {
    max-width: 900px;
    margin: 3rem auto 0;
}

.faq-details {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    margin-bottom: 1.2rem;
    overflow: hidden;
    box-shadow: 0 4px 15px var(--shadow-color);
    transition: all 0.3s ease;
}

.faq-details[open] {
    border-color: var(--primary-color);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.15);
}

.faq-summary {
    padding: 1.25rem 1.75rem;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-color);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
    list-style: none;
}

.faq-summary::-webkit-details-marker {
    display: none;
}

.faq-summary:hover {
    color: var(--primary-color);
}

.summary-chevron {
    transition: transform 0.3s ease;
    font-size: 0.95rem;
    color: var(--text-muted);
}

.faq-details[open] .summary-chevron {
    transform: rotate(180deg);
    color: var(--primary-color);
}

.faq-content {
    padding: 0 1.75rem 1.5rem;
    color: var(--text-muted);
    line-height: 1.6;
    font-size: 0.95rem;
    border-top: 1px solid rgba(255, 255, 255, 0.03);
}

[data-theme="light"] .faq-content {
    border-top: 1px solid rgba(0, 0, 0, 0.03);
}

/* --- WINNERS / CHAMPIONS GRID STYLES --- */
.winners-section-title {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text-color);
    margin: 3rem 0 1.5rem;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.winners-section-title i {
    color: #fbbf24;
}

.winners-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 4rem;
}

.winner-card {
    height: 100%;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.winner-img-wrapper {
    width: 100%;
    height: 190px;
    overflow: hidden;
    border-bottom: 1px solid var(--border-color);
}

.winner-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.winner-card:hover .winner-img-wrapper img {
    transform: scale(1.05);
}

.winner-content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex-grow: 1;
}

.winner-year {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--accent-color);
    margin-bottom: 0.2rem;
}

.winner-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 0.1rem;
}

.winner-school {
    font-size: 0.9rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 0.4rem;
}

.winner-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.5;
    margin: 0;
}

/* --- RESPONSIVE ADJUSTMENTS --- */
@media (max-width: 1024px) {
    .winners-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    .image-gallery-grid {
        gap: 0.75rem;
        margin-top: 1.5rem;
    }
    
    .xcpc-timeline::before {
        left: 20px;
    }
    
    .xcpc-timeline-item {
        width: 100%;
        padding-left: 45px;
        padding-right: 0;
        text-align: left !important;
    }
    
    .xcpc-timeline-item:nth-child(even) {
        left: 0;
    }
    
    .xcpc-timeline-dot {
        left: 12px !important;
        right: auto !important;
    }
    
    .winners-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .winner-img-wrapper {
        height: 180px;
    }
}

/* ===== 蓝桥杯页面样式 ===== */

.lanqiao-hero {
    padding: 140px 0 60px;
    text-align: center;
    position: relative;
    background-image: radial-gradient(circle at top, rgba(59, 130, 246, 0.05) 0%, transparent 70%);
}

.lanqiao-hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.lanqiao-hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 0.75rem;
    line-height: 1.2;
}

.lanqiao-hero h1 i {
    color: var(--accent-color);
    margin-right: 8px;
    filter: drop-shadow(0 0 10px var(--accent-glow));
    animation: pulse 2s infinite alternate;
}

.lanqiao-hero h1 span {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.lanqiao-hero p {
    color: var(--text-muted);
    font-size: 1.1rem;
    line-height: 1.6;
}

@keyframes pulse {
    0% { transform: scale(1); }
    100% { transform: scale(1.05); }
}

.lanqiao-section {
    padding: 20px 0;
}

.stats-section {
    padding-top: 0;
}

/* 统计卡片样式 - 默认为蓝桥杯页面的小尺寸 */
.stats-section .stats-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 1.25rem;
    max-width: 1200px;
    margin: 0 auto;
}

.stats-section .stat-card {
    text-align: center;
    padding: 1.75rem 1.25rem;
    position: relative;
    overflow: hidden;
}

.stats-section .stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    opacity: 0;
    transition: opacity 0.3s;
}

.stats-section .stat-card:hover {
    transform: translateY(-5px);
}

.stats-section .stat-card:hover::before {
    opacity: 1;
}

.stats-section .stat-card i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    transition: transform 0.3s;
}

.stats-section .stat-card:hover i {
    transform: scale(1.15);
}

.stats-section .stat-number {
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--text-color) 30%, var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    margin-bottom: 4px;
}

.stats-section .stat-label {
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* 首页统计卡片 - 大尺寸 */
.stats-section.stats-section-home .stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
    max-width: 1200px;
    margin: 0 auto;
}

.stats-section.stats-section-home .stat-card {
    text-align: center;
    padding: 4rem 2.5rem;
    position: relative;
    overflow: hidden;
}

.stats-section.stats-section-home .stat-card i {
    font-size: 3.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    filter: drop-shadow(0 0 12px var(--primary-glow));
    transition: transform 0.3s;
}

.stats-section.stats-section-home .stat-card:hover i {
    transform: scale(1.15);
}

.stats-section.stats-section-home .stat-number {
    font-size: 4.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--text-color) 30%, var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    margin-bottom: 0.75rem;
}

.stats-section.stats-section-home .stat-label {
    color: var(--text-muted);
    font-size: 1.15rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

@media (max-width: 1024px) {
    .stats-section .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .stats-section .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
}

.filter-section {
    padding-top: 0;
}

.lanqiao-filter-card {
    padding: 20px 24px;
    margin-bottom: 32px;
}

.lanqiao-filter-flex {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: center;
}

.lanqiao-search-wrap {
    position: relative;
    flex: 1;
    min-width: 240px;
}

.lanqiao-search-wrap i {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: color var(--transition-speed);
}

.lanqiao-search-wrap input {
    width: 100%;
    padding: 12px 16px 12px 38px;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
    background: var(--input-bg);
    color: var(--text-color);
    font-size: 0.95rem;
    outline: none;
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}

.lanqiao-search-wrap input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 12px var(--primary-glow);
}

.lanqiao-search-wrap input:focus + i {
    color: var(--primary-color);
}

.lanqiao-filter-flex select {
    padding: 12px 20px;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
    background: var(--input-bg);
    color: var(--text-color);
    font-size: 0.95rem;
    outline: none;
    cursor: pointer;
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
    min-width: 150px;
}

.lanqiao-filter-flex select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 12px var(--primary-glow);
}

.section-header {
    text-align: center;
    margin-bottom: 24px;
}

.section-header h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 6px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.section-header h2 i {
    color: var(--primary-color);
}

.section-subtitle {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.table-wrap {
    overflow-x: auto;
    border-radius: var(--border-radius-md);
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.lanqiao-table,
.lanqiao-detail-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}

.lanqiao-table th,
.lanqiao-table td,
.lanqiao-detail-table th,
.lanqiao-detail-table td {
    padding: 16px 20px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.lanqiao-table thead th,
.lanqiao-detail-table thead th {
    background: rgba(59, 130, 246, 0.06);
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.lanqiao-table tbody tr {
    transition: background-color 0.2s, transform 0.1s;
    cursor: pointer;
}

.lanqiao-table tbody tr:hover {
    background: var(--card-bg-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.lanqiao-table tbody tr:active {
    transform: scale(0.995);
    background: rgba(59, 130, 246, 0.08);
}

.lanqiao-table td:first-child,
.lanqiao-detail-table td:first-child {
    color: var(--text-muted);
    font-weight: 600;
}

.sortable {
    cursor: pointer;
    user-select: none;
    transition: color 0.2s, background-color 0.2s;
}

.sortable:hover {
    color: var(--primary-color);
    background: rgba(59, 130, 246, 0.1);
}

.btn-detail {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.3);
    color: var(--primary-color);
    padding: 8px 16px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.85rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-detail:hover {
    background: var(--primary-color);
    color: #fff;
    border-color: var(--primary-color);
    box-shadow: 0 0 10px var(--primary-glow);
}

/* 分页 */
.pagination-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 24px;
    padding: 16px 24px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    backdrop-filter: blur(12px);
}

.pagination-summary {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.pagination-controls {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
    justify-content: center;
}

.pagination-controls span {
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
}

.pagination-controls button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* 模态框 */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: 20px;
}

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

.modal-content {
    width: 100%;
    max-width: 800px;
    max-height: 85vh;
    overflow-y: auto;
    padding: 32px;
    animation: modalSlideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.modal-header h3 {
    font-size: 1.6rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-color) 30%, var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.modal-close {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--input-bg);
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: all 0.2s;
}

.modal-close:hover {
    background: rgba(239, 68, 68, 0.15);
    border-color: #ef4444;
    color: #ef4444;
}

.stats-strip {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 10px;
    margin-bottom: 24px;
}

.stat-mini {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 12px 8px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    transition: border-color 0.2s, transform 0.2s;
}

.stat-mini:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.stat-mini strong {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--primary-color);
}

.stat-mini span {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 2px;
}

/* 奖项徽章 */
.award-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 600;
}

.award-gold {
    background: rgba(250, 204, 21, 0.15);
    color: #facc15;
    border: 1px solid rgba(250, 204, 21, 0.3);
}

.award-silver {
    background: rgba(148, 163, 184, 0.15);
    color: #94a3b8;
    border: 1px solid rgba(148, 163, 184, 0.3);
}

.award-bronze {
    background: rgba(217, 119, 6, 0.15);
    color: #d97706;
    border: 1px solid rgba(217, 119, 6, 0.3);
}

/* 蓝桥杯响应式 */
@media (max-width: 768px) {
    .lanqiao-table,
    .lanqiao-detail-table {
        font-size: 0.85rem;
    }

    .lanqiao-table th,
    .lanqiao-table td,
    .lanqiao-detail-table th,
    .lanqiao-detail-table td {
        padding: 10px 8px;
    }

    .modal-content {
        padding: 20px;
    }

    .stats-strip {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
    }

    .pagination-bar {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
        padding: 16px;
    }

    .pagination-controls {
        flex-direction: column;
        gap: 8px;
    }
}