/* ===== CSS Variables ===== */
:root {
    /* Colors - Dark Theme */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --bg-card: rgba(26, 26, 37, 0.8);
    --bg-card-hover: rgba(35, 35, 50, 0.9);
    
    /* Accent Colors */
    --accent-primary: #00d4ff;
    --accent-secondary: #7c3aed;
    --accent-gradient: linear-gradient(135deg, #00d4ff 0%, #7c3aed 100%);
    --accent-glow: rgba(0, 212, 255, 0.3);
    
    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);
    
    /* Status Colors */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    
    /* Border */
    --border-color: rgba(255, 255, 255, 0.1);
    --border-glow: rgba(0, 212, 255, 0.2);
    
    /* Spacing */
    --container-max: 1200px;
    --section-padding: 120px;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Animation */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: auto; /* Let Lenis handle smooth scrolling */
}

/* ===== Custom Scrollbar ===== */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 5px;
    border: 2px solid var(--bg-primary);
    transition: background var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}

/* ===== Scroll Reveal Animation ===== */
.reveal-element {
    opacity: 0;
    transform: translateY(40px) scale(0.96);
    will-change: opacity, transform;
}

.reveal-element.active {
    opacity: 1;
    transform: translateY(0) scale(1);
    transition: all 1s cubic-bezier(0.16, 1, 0.3, 1); /* Ultra smooth easing */
}

/* Staggered Delays for Grid Items */
.reveal-element:nth-child(1) { transition-delay: 0.1s; }
.reveal-element:nth-child(2) { transition-delay: 0.2s; }
.reveal-element:nth-child(3) { transition-delay: 0.3s; }
.reveal-element:nth-child(4) { transition-delay: 0.4s; }
.reveal-element:nth-child(5) { transition-delay: 0.5s; }
.reveal-element:nth-child(6) { transition-delay: 0.6s; }

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

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

/* ===== Background Animation ===== */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
}

.grid-lines {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    animation: gridMove 20s linear infinite;
    will-change: transform, background-position;
}

@keyframes gridMove {
    0% { background-position: 0 0; }
    100% { background-position: 60px 60px; }
}

.floating-particles {
    position: absolute;
    width: 100%;
    height: 100%;
}

.floating-particles::before,
.floating-particles::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.15;
    animation: float 15s ease-in-out infinite;
}

.floating-particles::before {
    background: var(--accent-primary);
    top: 10%;
    left: 10%;
}

.floating-particles::after {
    background: var(--accent-secondary);
    bottom: 10%;
    right: 10%;
    animation-delay: -7s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(50px, -50px) scale(1.1); }
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.15) 0%, rgba(124, 58, 237, 0.15) 100%);
    border: 1px solid rgba(0, 212, 255, 0.3);
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.2);
    transition: all 0.3s ease;
    overflow: hidden;
}

.logo:hover {
    transform: scale(1.08);
    box-shadow: 0 6px 30px rgba(0, 212, 255, 0.35);
    border-color: rgba(0, 212, 255, 0.5);
}

.logo img {
    width: 32px;
    height: 32px;
    object-fit: contain;
    filter: drop-shadow(0 2px 8px rgba(0, 212, 255, 0.4));
}

.brand-name {
    font-size: 1.25rem;
    font-weight: 600;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

/* Language Switcher Dropdown */
.language-switcher {
    position: relative;
}

.lang-current {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-family);
    white-space: nowrap;
}

.lang-current:hover {
    color: var(--text-primary);
    border-color: var(--accent-primary);
}

.language-switcher.open .lang-current {
    color: var(--text-primary);
    border-color: var(--accent-primary);
    box-shadow: 0 0 12px rgba(0, 212, 255, 0.15);
}

.lang-globe {
    flex-shrink: 0;
    opacity: 0.7;
}

.lang-current:hover .lang-globe,
.language-switcher.open .lang-globe {
    opacity: 1;
}

.lang-arrow {
    flex-shrink: 0;
    transition: transform var(--transition-normal);
    opacity: 0.5;
}

.language-switcher.open .lang-arrow {
    transform: rotate(180deg);
    opacity: 0.8;
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 160px;
    padding: 6px;
    background: rgba(26, 26, 37, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--transition-normal);
    z-index: 1001;
}

.language-switcher.open .lang-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    display: flex;
    align-items: center;
    padding: 8px 12px;
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-family);
}

.lang-option:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.lang-option.active {
    color: var(--accent-primary);
    background: rgba(0, 212, 255, 0.08);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
}

.btn svg {
    width: 18px;
    height: 18px;
}

.btn-primary {
    background: var(--accent-gradient);
    color: var(--bg-primary);
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--accent-glow);
}

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

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-primary);
}

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

.btn-outline:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 0 20px var(--accent-glow);
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1rem;
}

.btn-xl {
    padding: 18px 36px;
    font-size: 1.1rem;
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    position: relative;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 100px;
    font-size: 0.85rem;
    color: var(--accent-primary);
    margin-bottom: 24px;
}

.badge-icon::before {
    content: '✦';
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
}

.gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 540px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 32px;
}

.stat-item {
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--accent-primary);
}

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

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border-color);
}

/* Hero Visual */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.shield-animation {
    position: relative;
    width: 320px;
    height: 320px;
}

.shield-outer,
.shield-middle,
.shield-inner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
}

.shield-outer {
    width: 320px;
    height: 320px;
    border: 2px solid rgba(0, 212, 255, 0.1);
    animation: rotateReverse 30s linear infinite;
}

.shield-outer::before {
    content: '';
    position: absolute;
    top: -4px;
    left: 50%;
    width: 8px;
    height: 8px;
    background: var(--accent-primary);
    border-radius: 50%;
    box-shadow: 0 0 20px var(--accent-primary);
}

.shield-middle {
    width: 240px;
    height: 240px;
    border: 2px dashed rgba(124, 58, 237, 0.2);
    animation: rotate 25s linear infinite;
}

.shield-inner {
    width: 160px;
    height: 160px;
    background: rgba(0, 212, 255, 0.05);
    border: 2px solid rgba(0, 212, 255, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: glow 3s ease-in-out infinite;
}

.shield-inner svg {
    width: 80px;
    height: 80px;
    color: var(--accent-primary);
}

@keyframes rotate {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

@keyframes rotateReverse {
    from { transform: translate(-50%, -50%) rotate(360deg); }
    to { transform: translate(-50%, -50%) rotate(0deg); }
}

@keyframes glow {
    0%, 100% { box-shadow: 0 0 30px rgba(0, 212, 255, 0.2); }
    50% { box-shadow: 0 0 60px rgba(0, 212, 255, 0.4); }
}

.threat-indicators {
    position: absolute;
    right: -40px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.threat-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: var(--bg-card);
    border-radius: 8px;
    font-size: 0.8rem;
    white-space: nowrap;
    animation: slideIn 0.5s ease forwards;
    opacity: 0;
    transform: translateX(20px);
}

.threat-item:nth-child(1) { animation-delay: 0.5s; }
.threat-item:nth-child(2) { animation-delay: 1s; }
.threat-item:nth-child(3) { animation-delay: 1.5s; }

@keyframes slideIn {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.threat-item.blocked .threat-icon::before {
    content: '✕';
    color: var(--color-danger);
}

.threat-item.safe .threat-icon::before {
    content: '✓';
    color: var(--color-success);
}

/* ===== Section Styles ===== */
section {
    padding: var(--section-padding) 0;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.section-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== Features Section ===== */
.features {
    background: var(--bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    align-items: stretch;
}

/* Make the first card (Highlight) span 3 rows vertically */
.feature-card.feature-highlight {
    grid-row: span 3;
    align-content: start; /* Ensure content starts at top */
}

/* Make the last card span 2 columns */
.feature-card:last-child {
    grid-column: span 2;
}

.feature-card {
    padding: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    transition: all var(--transition-normal);
    display: grid;
    grid-template-columns: auto 1fr;
    grid-template-rows: auto 1fr;
    gap: 16px;
    align-items: center;
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-glow);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

/* 第一个卡片 - 一键实时防护 (突出显示) */
.feature-card.feature-highlight {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(124, 58, 237, 0.1) 100%);
    border-color: rgba(0, 212, 255, 0.3);
    position: relative;
}

.feature-card.feature-highlight::before {
    content: '';
    position: absolute;
    top: -1px;
    left: -1px;
    right: -1px;
    bottom: -1px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(124, 58, 237, 0.2));
    border-radius: 16px;
    z-index: -1;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.feature-card.feature-highlight:hover::before {
    opacity: 1;
}

.feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.1);
    border-radius: 12px;
    margin-bottom: 0;
    color: var(--accent-primary);
    grid-column: 1;
    grid-row: 1;
}

.feature-icon svg {
    width: 24px;
    height: 24px;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0;
    grid-column: 2;
    grid-row: 1;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    grid-column: 1 / -1;
    margin-top: 8px;
}

.feature-list {
    list-style: none;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
    grid-column: 1 / -1;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.feature-list li::before {
    content: '✓';
    color: var(--color-success);
    font-weight: bold;
}

/* ===== Technology Section ===== */
.tech-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.tech-diagram {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.tech-layer {
    padding: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    text-align: center;
}

.layer-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
}

.layer-content {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.tech-tag {
    padding: 8px 16px;
    background: rgba(0, 212, 255, 0.1);
    border-radius: 6px;
    font-size: 0.85rem;
    color: var(--accent-primary);
}

.layer-ui { border-color: rgba(0, 212, 255, 0.3); }
.layer-service { border-color: rgba(124, 58, 237, 0.3); }
.layer-core { border-color: rgba(16, 185, 129, 0.3); }

.layer-ui .tech-tag { background: rgba(0, 212, 255, 0.1); color: var(--accent-primary); }
.layer-service .tech-tag { background: rgba(124, 58, 237, 0.1); color: var(--accent-secondary); }
.layer-core .tech-tag { background: rgba(16, 185, 129, 0.1); color: var(--color-success); }

.tech-connector {
    width: 2px;
    height: 24px;
    background: var(--border-color);
    margin: 0 auto;
}

.tech-features {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.tech-feature {
    display: flex;
    gap: 16px;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: all var(--transition-normal);
}

.tech-feature:hover {
    border-color: var(--border-glow);
}

.tech-feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.1);
    border-radius: 10px;
    flex-shrink: 0;
    color: var(--accent-primary);
}

.tech-feature-icon svg {
    width: 24px;
    height: 24px;
}

.tech-feature-content h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

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

/* ===== Screenshots Section ===== */
.screenshots {
    background: var(--bg-secondary);
}

.screenshots-gallery {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 24px;
}

.screenshot-item {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
}

.screenshot-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform var(--transition-slow);
    cursor: pointer;
}

.screenshot-item:hover {
    transform: translateY(-4px);
    border-color: var(--border-glow);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.screenshot-item:hover img {
    transform: scale(1.05);
}

.screenshot-item.main {
    grid-row: span 2;
}

.screenshot-item.wide {
    grid-column: span 2;
}

.screenshot-placeholder {
    aspect-ratio: 16/10;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.05) 0%, rgba(124, 58, 237, 0.05) 100%);
}

.screenshot-item.main .screenshot-placeholder {
    aspect-ratio: auto;
    height: 100%;
}

.placeholder-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: var(--text-muted);
}

.placeholder-content svg {
    width: 64px;
    height: 64px;
    opacity: 0.5;
}

.placeholder-content span {
    font-size: 0.9rem;
}

.placeholder-hint {
    font-size: 0.75rem !important;
    opacity: 0.6;
}

.screenshot-label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 16px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    font-size: 0.9rem;
    font-weight: 500;
}

/* ===== Platforms Section ===== */
.platforms-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.platform-card {
    padding: 40px 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    text-align: center;
    transition: all var(--transition-normal);
}

.platform-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-glow);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.platform-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    color: var(--accent-primary);
}

.platform-icon svg {
    width: 100%;
    height: 100%;
}

.platform-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.platform-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.platform-status {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
}

.platform-status.available {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.platform-card.featured {
    border-color: var(--accent-primary);
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.05) 0%, rgba(124, 58, 237, 0.05) 100%);
}

.platform-card.featured::before {
    content: 'Recommended';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 4px 12px;
    background: var(--accent-gradient);
    color: var(--bg-primary);
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 100px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.platform-card.featured {
    position: relative;
}

/* ===== CTA Section ===== */
.cta {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(124, 58, 237, 0.1) 100%);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.cta-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.cta-content > p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.cta-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 24px;
}

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

/* CTA 平台分组容器 */
.cta-other-section {
    max-width: 600px;
    margin: 0 auto;
}

/* 平台分组卡片 */
.cta-platform-group {
    padding: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-bottom: 16px;
    transition: border-color var(--transition-normal);
}

.cta-platform-group:last-child {
    margin-bottom: 0;
}

.cta-platform-group:hover {
    border-color: var(--border-glow);
}

/* 平台组标题 */
.cta-platform-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.cta-platform-title svg {
    width: 24px;
    height: 24px;
    color: var(--accent-primary);
    flex-shrink: 0;
}

/* 平台组内下载按钮 */
.cta-platform-group .cta-actions {
    margin-bottom: 0;
    flex-wrap: wrap;
}

/* ===== Footer ===== */
.footer {
    padding: 48px 0;
    background: var(--bg-secondary);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-brand .logo {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.12) 0%, rgba(124, 58, 237, 0.12) 100%);
    border: 1px solid rgba(0, 212, 255, 0.25);
    box-shadow: 0 3px 15px rgba(0, 212, 255, 0.15);
}

.footer-brand .logo img {
    width: 26px;
    height: 26px;
}

.footer-brand span {
    font-size: 1.1rem;
    font-weight: 600;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--accent-primary);
}

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

.footer-copyright a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        order: 1;
    }
    
    .hero-visual {
        order: 0;
        margin-bottom: 40px;
    }
    
    .hero-description {
        margin: 0 auto 32px;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .threat-indicators {
        display: none;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tech-showcase {
        grid-template-columns: 1fr;
    }
    
    .screenshots-gallery {
        grid-template-columns: 1fr 1fr;
    }
    
    .screenshot-item.main {
        grid-column: span 2;
        grid-row: span 1;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 80px;
    }
    
    .nav-links {
        display: none;
    }
    
    .language-switcher {
        position: relative;
    }

    .lang-current {
        padding: 5px 8px;
        font-size: 0.75rem;
    }

    .lang-current-text {
        display: none;
    }

    .lang-dropdown {
        right: 0;
        min-width: 140px;
    }
    
    .nav-actions {
        gap: 12px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-card.feature-highlight {
        grid-column: span 1;
    }
    
    .screenshots-gallery {
        grid-template-columns: 1fr;
    }
    
    .screenshot-item.main {
        grid-column: span 1;
    }
    
    .platforms-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-content h2 {
        font-size: 2rem;
    }
    
    .cta-other-section.expanded {
        max-height: 1000px;
    }
    
    .cta-platform-group {
        padding: 16px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 16px;
    }
    
    .stat-divider {
        width: 40px;
        height: 1px;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .btn-lg, .btn-xl {
        width: 100%;
        justify-content: center;
    }
}

/* ===== Image Lightbox ===== */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    transition: opacity var(--transition-normal);
    cursor: pointer;
}

.lightbox.active {
    display: flex;
    animation: fadeIn var(--transition-normal) forwards;
}

@keyframes fadeIn {
    to { opacity: 1; }
}

.lightbox-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
    animation: zoomIn var(--transition-slow) ease;
}

@keyframes zoomIn {
    from {
        transform: scale(0.8);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.lightbox-content img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 212, 255, 0.3);
}

.lightbox-close {
    position: absolute;
    top: -40px;
    right: -40px;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-primary);
    font-size: 24px;
    line-height: 1;
}

.lightbox-close:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    transform: rotate(90deg);
}

@media (max-width: 768px) {
    .lightbox-close {
        top: 10px;
        right: 10px;
    }
}