/* ==================== CSS Variables ==================== */
:root {
    --neon-cyan: #00f5ff;
    --neon-purple: #bf5fff;
    --neon-pink: #ff2d95;
    --neon-green: #39ff14;
    --bg-dark: #0a0a0f;
    --bg-card: #12121a;
    --bg-card-hover: #1a1a25;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;

    --font-display: 'Orbitron', monospace;
    --font-body: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;

    --transition-fast: 0.3s ease;
    --transition-medium: 0.4s ease;
    --transition-slow: 0.6s ease;
}

/* ==================== Reset & Base ==================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

/* 隐藏滚动条 */
::-webkit-scrollbar {
    width: 0px;
    height: 0px;
}

html {
    scrollbar-width: none;
    -ms-overflow-style: none;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

/* ==================== Background Effects ==================== */
.bg-effects {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.bg-effects::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background:
        radial-gradient(ellipse at 20% 20%, rgba(0, 245, 255, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(191, 95, 255, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(255, 45, 149, 0.05) 0%, transparent 60%);
    animation: bgRotate 30s linear infinite;
}

@keyframes bgRotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.grid-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(0, 245, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 245, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: 1;
}

.content {
    position: relative;
    z-index: 10;
}

/* ==================== Navigation ==================== */
nav {
    /* position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100; */
    padding: 1rem 2rem;
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 245, 255, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 3px;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color var(--transition-fast);
    position: relative;
    padding: 0.5rem 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple));
    transition: width var(--transition-fast);
}

.nav-links a:hover {
    color: var(--text-primary);
}

.nav-links a:hover::after {
    width: 100%;
}

/* ==================== Hero Section ==================== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 7rem 2rem 4rem;
    position: relative;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.2rem;
    background: rgba(0, 245, 255, 0.1);
    border: 1px solid rgba(0, 245, 255, 0.3);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--neon-cyan);
    margin-bottom: 2rem;
    animation: fadeInUp 0.8s ease;
}

.hero-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--neon-cyan);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.3); }
}

.hero h1 {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 900;
    line-height: 1.15;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.8s ease 0.15s both;
}

.hero h1 .line1 {
    display: block;
    color: var(--text-primary);
}

.hero h1 .line2 {
    display: block;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple), var(--neon-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 0.65em;
    letter-spacing: 0.2em;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 550px;
    margin-bottom: 3rem;
    animation: fadeInUp 0.8s ease 0.3s both;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    animation: fadeInUp 0.8s ease 0.45s both;
}

.btn {
    padding: 1rem 2.2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
    color: var(--bg-dark);
    border: none;
    box-shadow: 0 0 30px rgba(0, 245, 255, 0.25);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 50px rgba(0, 245, 255, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
}

.scroll-hint {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    z-index: 100;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.8rem;
    animation: bounce 2.5s infinite;
    opacity: 1;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.scroll-hint.hidden {
    opacity: 0;
}

.scroll-hint svg {
    width: 24px;
    height: 24px;
    stroke: var(--neon-cyan);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

/* ==================== Section Styles ==================== */
.section {
    padding: 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-tag {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 0.75rem;
    color: var(--neon-purple);
    letter-spacing: 0.3em;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.section-desc {
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

/* ==================== Tools Section ==================== */
.tools-section {
    padding: 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
}

.tool-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    padding: 2rem;
    transition: all var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple));
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.tool-card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-8px);
    border-color: rgba(0, 245, 255, 0.2);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
}

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

.tool-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.tool-icon.wallpaper {
    background: linear-gradient(135deg, rgba(0, 245, 255, 0.15), rgba(0, 245, 255, 0.05));
}

.tool-icon.files {
    background: linear-gradient(135deg, rgba(191, 95, 255, 0.15), rgba(191, 95, 255, 0.05));
}

.tool-icon.tools {
    background: linear-gradient(135deg, rgba(255, 45, 149, 0.15), rgba(255, 45, 149, 0.05));
}

.tool-icon.more {
    background: linear-gradient(135deg, rgba(57, 255, 20, 0.15), rgba(57, 255, 20, 0.05));
}

.tool-name {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.tool-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.tool-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--neon-cyan);
    font-weight: 500;
    font-size: 0.9rem;
    transition: gap var(--transition-fast);
}

.tool-link:hover {
    gap: 0.8rem;
}

.tool-link svg {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-fast);
}

.tool-link:hover svg {
    transform: translateX(3px);
}

/* ==================== Features Section ==================== */
.features-section {
    padding: 6rem 2rem;
    background: linear-gradient(180deg, transparent, rgba(0, 245, 255, 0.02), transparent);
}

.features-container {
    max-width: 1000px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.feature-item {
    text-align: center;
    padding: 2rem;
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feature-name {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.feature-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ==================== About Section ==================== */
.about-section {
    padding: 6rem 2rem;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-content {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 2;
}

.about-content strong {
    color: var(--text-primary);
}

.about-content p + p {
    margin-top: 1rem;
}

/* ==================== Footer ==================== */
footer {
    padding: 3rem 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-links a {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--neon-cyan);
}

.footer-copy {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.footer-copy a {
    color: var(--neon-cyan);
}

.footer-icp {
    margin-top: 0.75rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.footer-icp a {
    color: var(--text-secondary);
}

.footer-icp a:hover {
    color: var(--neon-cyan);
}

/* ==================== Responsive ==================== */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

    .hero h1 .line2 {
        font-size: 0.5em;
        letter-spacing: 0.1em;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
        max-width: 280px;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .section-title {
        font-size: 2rem;
    }

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

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

    .feature-item {
        padding: 1.5rem 1rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 6rem 1.5rem 3rem;
    }

    .section {
        padding: 4rem 1.5rem;
    }

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