:root {
    /* Color Palette */
    /* Dohna Dohna Palette */
    --bg-dark: #000000;
    --bg-card: #ffffff;
    --primary: #ff00ff; /* Neon Pink */
    --secondary: #00ffff; /* Cyber Cyan */
    --accent: #ffff00; /* Neon Yellow */
    --text-main: #ffffff;
    --text-dark: #000000;
    --text-dim: #cccccc;
    --border-thick: 4px solid #000000;
    --shadow-pop: 8px 8px 0px #000000;
    --shadow-pink: 8px 8px 0px var(--primary);
    --shadow-cyan: 8px 8px 0px var(--secondary);

    /* Typography */
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    /* Spacing */
    --section-padding: 100px 5%;

    /* Spring Physics */
    --spring-bezier: cubic-bezier(0.68, -0.6, 0.32, 1.6);
    --transition-spring: all 0.5s var(--spring-bezier);

    /* Patterns */
    --halftone: radial-gradient(#000 25%, transparent 25%);
    --halftone-size: 8px 8px;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-main);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 10px;
}

/* Reveal Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px) skewY(2deg);
    transition: all 0.6s var(--spring-bezier);
}

.reveal.active {
    opacity: 1 !important;
    transform: translateY(0) skewY(0) !important;
}

/* Fallback for no-js or slow loading */
.no-js .reveal {
    opacity: 1;
    transform: none;
}

.floating {
    animation: floating 3s ease-in-out infinite;
}

@keyframes floating {
    0% { transform: translateY(0) rotate(0); }
    50% { transform: translateY(-15px) rotate(2deg); }
    100% { transform: translateY(0) rotate(0); }
}

.parallax-bg {
    will-change: transform;
}

.feature-card.glass:nth-child(odd) {
    background: var(--secondary);
    box-shadow: 10px 10px 0px #000;
    transform: rotate(-1deg);
}

.feature-card.glass:nth-child(even) {
    background: var(--primary);
    box-shadow: 10px 10px 0px #000;
    transform: rotate(1deg);
}

.feature-card:hover {
    transform: translate(-6px, -6px) rotate(0deg) !important;
    box-shadow: 14px 14px 0px #000 !important;
    transition: var(--transition-spring);
}

.feature-card:active {
    transform: translate(2px, 2px) !important;
    box-shadow: 4px 4px 0px #000 !important;
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
}

nav.scrolled {
    padding: 15px 5%;
    background: rgba(10, 10, 12, 0.8);
    backdrop-filter: blur(10px);
}

.logo {
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--text-dark);
    background: var(--primary);
    padding: 5px 15px;
    border: var(--border-thick);
    box-shadow: 4px 4px 0px #000;
    transform: rotate(-2deg);
}

.nav-links {
    display: flex;
    gap: 20px;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-main);
    background: #000;
    padding: 5px 10px;
    font-weight: 900;
    border: 2px solid var(--text-main);
    transition: all 0.2s;
}

.nav-links a:hover {
    background: var(--secondary);
    color: #000;
    border-color: #000;
    transform: translateY(-2px);
}

/*- [x] Homepage Refinement
    - [x] Rebrand to "巡璃XunLys"
    - [x] Implement interactive "Path Selection" in Hero section
    - [x] Fine-tune transitions between choices*/
/* Pop Art Layout Utilities */
.halftone-bg {
    background-image: var(--halftone);
    background-size: var(--halftone-size);
    opacity: 0.15;
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 0;
}

.warning-tape {
    background: var(--accent);
    color: #000;
    font-weight: 900;
    padding: 15px 0;
    border-top: var(--border-thick);
    border-bottom: var(--border-thick);
    text-transform: uppercase;
    font-size: 1.5rem;
    overflow: hidden;
    white-space: nowrap;
    transform: rotate(-3deg) scale(1.1);
    margin: 60px -5%;
    position: relative;
    z-index: 10;
}

.warning-tape span {
    display: inline-block;
    padding-left: 100%;
    animation: marquee 20s linear infinite;
}

@keyframes marquee {
    0% { transform: translate(0, 0); }
    100% { transform: translate(-100%, 0); }
}

.glitch-text {
    position: relative;
    display: inline-block;
}

.glitch-text::before,
.glitch-text::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.8;
}

.glitch-text::before {
    left: 2px;
    text-shadow: -2px 0 var(--primary);
    clip: rect(44px, 450px, 56px, 0);
    animation: glitch-anim 5s infinite linear alternate-reverse;
}

.glitch-text::after {
    left: -2px;
    text-shadow: -2px 0 var(--secondary);
    clip: rect(44px, 450px, 56px, 0);
    animation: glitch-anim2 5s infinite linear alternate-reverse;
}

@keyframes glitch-anim {
    0% { clip: rect(31px, 9999px, 94px, 0); }
    20% { clip: rect(62px, 9999px, 42px, 0); }
    /* ... more frames ... */
    100% { clip: rect(89px, 9999px, 98px, 0); }
}

section {
    padding: 100px 5%;
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(157, 78, 221, 0.2) 0%, transparent 70%);
    top: -200px;
    right: -200px;
    z-index: -1;
}

.hero::after {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(0, 245, 212, 0.15) 0%, transparent 70%);
    bottom: -100px;
    left: -100px;
    z-index: -1;
}

.hero-content {
    z-index: 10;
}

.hero h1 {
    font-size: 5rem;
    margin-bottom: 10px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
}

.hero p {
    font-size: 1.4rem;
    color: var(--text-dim);
    margin-bottom: 50px;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.secondary-btn {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary-light);
}

.secondary-btn:hover {
    background: var(--primary);
    color: white;
}

/* Glitch Effect */
.glitch {
    position: relative;
}

.glitch::before,
.glitch::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-dark);
}

.glitch::before {
    left: 2px;
    text-shadow: -2px 0 var(--secondary);
    clip: rect(44px, 450px, 56px, 0);
    animation: glitch-anim 5s infinite linear alternate-reverse;
}

.glitch::after {
    left: -2px;
    text-shadow: -2px 0 var(--primary);
    clip: rect(44px, 450px, 56px, 0);
    animation: glitch-anim2 5s infinite linear alternate-reverse;
}

@keyframes glitch-anim {
    0% {
        clip: rect(10px, 9999px, 20px, 0);
    }

    20% {
        clip: rect(30px, 9999px, 40px, 0);
    }

    40% {
        clip: rect(50px, 9999px, 60px, 0);
    }

    60% {
        clip: rect(70px, 9999px, 80px, 0);
    }

    80% {
        clip: rect(90px, 9999px, 100px, 0);
    }

    100% {
        clip: rect(10px, 9999px, 20px, 0);
    }
}

@keyframes glitch-anim2 {
    0% {
        clip: rect(15px, 9999px, 25px, 0);
    }

    25% {
        clip: rect(35px, 9999px, 45px, 0);
    }

    50% {
        clip: rect(55px, 9999px, 65px, 0);
    }

    75% {
        clip: rect(75px, 9999px, 85px, 0);
    }

    100% {
        clip: rect(95px, 9999px, 105px, 0);
    }
}

.cta-button {
    padding: 15px 40px;
    font-size: 1.2rem;
    font-weight: 900;
    color: #000;
    background: var(--accent);
    border: var(--border-thick);
    box-shadow: 6px 6px 0px #000;
    cursor: pointer;
    transition: var(--transition-spring);
}

.cta-button:hover {
    transform: translate(-4px, -4px);
    box-shadow: 10px 10px 0px #000;
}

.cta-button:active {
    transform: translate(4px, 4px);
    box-shadow: 0px 0px 0px #000;
    transition: all 0.1s;
}

.primary-btn { background: var(--secondary); }
.secondary-btn { background: var(--primary); color: #fff; }

/* Sections */
section {
    padding: var(--section-padding);
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 50px;
    text-align: center;
}

/* App Features */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    padding: 40px;
    text-align: center;
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-10px);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    display: block;
}

/* Portfolio Grid */
/* Contact Section Layout */
.contact-container {
    max-width: 800px;
    margin: 40px auto;
    padding: 60px;
    text-align: center;
    background: var(--secondary); /* 改为霓虹青色 */
    border: var(--border-thick);
    box-shadow: 15px 15px 0px #000; /* 改为纯黑阴影 */
    color: #000;
}

.contact-container p {
    color: #000;
    margin-bottom: 40px;
    font-size: 1.2rem;
    font-weight: 800;
}

.contact-methods {
    display: flex;
    justify-content: center;
    gap: 50px;
    flex-wrap: wrap;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
    text-align: left;
}

.contact-icon {
    font-size: 2rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.contact-info {
    display: flex;
    flex-direction: column;
}

.contact-label {
    font-size: 0.9rem;
    color: #444; /* Darker grey for labels */
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 5px;
}

.contact-value {
    font-size: 1.4rem;
    font-weight: 900;
    color: #000; /* Pure black for values */
    text-decoration: none;
    transition: all 0.2s;
    border-bottom: 2px solid transparent;
}

.contact-value:hover {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.portfolio-item {
    position: relative;
    height: 300px;
    overflow: hidden;
    cursor: pointer;
    border: var(--border-thick);
    box-shadow: 10px 10px 0px #000;
    background: #000;
}

.portfolio-item:hover {
    transform: translate(-5px, -5px);
    box-shadow: 15px 15px 0px var(--primary);
}

.portfolio-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(1) contrast(1.2);
    transition: all 0.5s;
}

.portfolio-item:hover .portfolio-img {
    filter: grayscale(0) contrast(1);
}

.portfolio-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 20px;
    background: var(--accent);
    color: #000;
    border-top: var(--border-thick);
    transform: translateY(100%);
    transition: transform 0.3s cubic-bezier(0.23, 1, 0.32, 1);
}

.portfolio-item:hover .portfolio-overlay {
    transform: translateY(0);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
/* Screenshot Grid */
.screenshot-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    margin: 40px auto 0;
    max-width: 800px;
}

.screenshot-item {
    overflow: hidden;
    border: var(--border-thick);
    box-shadow: 6px 6px 0px #000;
    background: #000;
    transition: all 0.3s;
}

.screenshot-item:hover {
    transform: translate(-3px, -3px);
    box-shadow: 9px 9px 0px var(--secondary);
}

.screenshot-item img {
    width: 100%;
    height: auto;
    display: block;
}

.screenshot-label {
    padding: 8px;
    background: var(--bg-card);
    font-size: 0.8rem;
    color: var(--text-dim);
    text-align: center;
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
    background: none;
    border: none;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-main);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 768px) {

    .hamburger {
        display: flex;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        flex-direction: column;
        align-items: center;
        gap: 0;
        padding: 10px 0 20px;
        background: rgba(10, 10, 12, 0.95);
        backdrop-filter: blur(10px);
    }

    .nav-links.open {
        display: flex;
    }

    .nav-links li {
        width: 100%;
        text-align: center;
        padding: 12px 0;
        border-bottom: 1px solid var(--glass-border);
    }

    .hero h1 {
        font-size: 2.8rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .cta-button {
        width: 100%;
        max-width: 280px;
        text-align: center;
    }

    section {
        padding: 60px 5%;
    }

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

    .features-grid {
        grid-template-columns: 1fr;
    }

    .portfolio-grid {
        grid-template-columns: 1fr;
    }

    .contact-methods {
        flex-direction: column;
        gap: 25px;
        align-items: center;
    }

    .contact-container {
        padding: 30px 20px;
    }

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