/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 根变量 */
:root {
    --primary-color: #FF4500;
    --secondary-color: #FF6B35;
    --accent-color: #DC143C;
    --bg-primary: #0A0A0A;
    --bg-secondary: #1A1A1A;
    --bg-tertiary: #2A2A2A;
    --text-primary: #FFFFFF;
    --text-secondary: #CCCCCC;
    --text-muted: #888888;
    --border-color: #333333;
    --shadow-color: rgba(255, 69, 0, 0.3);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 基础样式 */
html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, 
        #0A0A0A 0%, 
        #1A0A0A 25%, 
        #0A0A1A 50%, 
        #1A0A0A 75%, 
        #0A0A0A 100%
    );
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 30%, rgba(255, 69, 0, 0.03) 0%, transparent 50%),
                radial-gradient(circle at 80% 70%, rgba(220, 20, 60, 0.03) 0%, transparent 50%),
                radial-gradient(circle at 50% 50%, rgba(139, 0, 0, 0.02) 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo h1 {
    font-family: 'Creepster', cursive;
    font-size: 1.5rem;
    color: var(--primary-color);
    text-shadow: 0 0 10px var(--shadow-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

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

/* 汉堡菜单 */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* 英雄区域 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(135deg, 
        #0A0A0A 0%, 
        #1A0505 20%, 
        #0A0A1A 40%, 
        #150A0A 60%, 
        #0A051A 80%, 
        #1A0A0A 100%
    );
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="0.5" fill="%23FF4500" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
    animation: grain 8s linear infinite;
}

@keyframes grain {
    0%, 100% { transform: translate(0, 0); }
    10% { transform: translate(-5%, -5%); }
    20% { transform: translate(-10%, 5%); }
    30% { transform: translate(5%, -10%); }
    40% { transform: translate(-5%, 15%); }
    50% { transform: translate(-10%, 5%); }
    60% { transform: translate(15%, 0%); }
    70% { transform: translate(0%, 10%); }
    80% { transform: translate(-15%, 0%); }
    90% { transform: translate(10%, 5%); }
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-family: 'Creepster', cursive;
    font-size: 3.5rem;
    color: var(--primary-color);
    text-shadow: 0 0 20px var(--shadow-color);
    margin-bottom: 1rem;
    animation: flicker 3s ease-in-out infinite;
}

@keyframes flicker {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-style: italic;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    line-height: 1.8;
}

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

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition);
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: 0 4px 15px var(--shadow-color);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--shadow-color);
}

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.btn-download {
    background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
    color: white;
    font-size: 1.2rem;
    padding: 16px 32px;
    box-shadow: 0 4px 15px rgba(220, 20, 60, 0.4);
}

.btn-download:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(220, 20, 60, 0.6);
}

/* 视频区域 */
.hero-video {
    display: flex;
    justify-content: center;
    align-items: center;
}

.video-placeholder {
    width: 100%;
    max-width: 500px;
    aspect-ratio: 16/9;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid var(--border-color);
    position: relative;
    overflow: hidden;
    background: var(--bg-tertiary);
}

.video-cover {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    overflow: hidden;
}

.cover-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.cover-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
}

.horror-gradient {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        135deg,
        rgba(0, 0, 0, 0.1) 0%,
        rgba(139, 0, 0, 0.2) 25%,
        rgba(0, 0, 0, 0.3) 50%,
        rgba(220, 20, 60, 0.2) 75%,
        rgba(0, 0, 0, 0.4) 100%
    );
    animation: horrorPulse 3s ease-in-out infinite;
}

@keyframes horrorPulse {
    0%, 100% { 
        opacity: 0.7;
        background: linear-gradient(
            135deg,
            rgba(0, 0, 0, 0.1) 0%,
            rgba(139, 0, 0, 0.2) 25%,
            rgba(0, 0, 0, 0.3) 50%,
            rgba(220, 20, 60, 0.2) 75%,
            rgba(0, 0, 0, 0.4) 100%
        );
    }
    50% { 
        opacity: 0.9;
        background: linear-gradient(
            135deg,
            rgba(139, 0, 0, 0.2) 0%,
            rgba(0, 0, 0, 0.3) 25%,
            rgba(220, 20, 60, 0.3) 50%,
            rgba(0, 0, 0, 0.4) 75%,
            rgba(139, 0, 0, 0.3) 100%
        );
    }
}

.video-info {
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.9), rgba(26, 26, 26, 0.9));
    padding: 12px 16px;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.video-info h3 {
    color: var(--text-primary);
    font-size: 1rem;
    margin-bottom: 4px;
    font-weight: 600;
}

.video-info p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin: 0;
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
    transition: var(--transition);
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
}

.video-placeholder:hover {
    transform: scale(1.05);
    border-color: var(--primary-color);
    box-shadow: 0 8px 25px rgba(255, 69, 0, 0.2);
}

.video-placeholder:hover .play-button {
    transform: translate(-50%, -50%) scale(1.1);
}

.video-placeholder:hover .screen-glow {
    animation-duration: 1s;
}

.video-placeholder:hover .atmospheric-overlay {
    animation-duration: 2s;
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: var(--bg-secondary);
    margin: 5% auto;
    padding: 20px;
    border-radius: 12px;
    width: 90%;
    max-width: 800px;
    position: relative;
    border: 1px solid var(--border-color);
}

.close {
    color: var(--text-secondary);
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: var(--transition);
}

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

.video-container {
    position: relative;
    width: 100%;
    height: 0;
    padding-bottom: 56.25%;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 8px;
}

/* 区域标题 */
.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-primary);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

/* 游戏特色 */
.features {
    padding: 100px 0;
    background: linear-gradient(180deg, 
        #1A1A1A 0%, 
        #1A0A0A 30%, 
        #0A0A1A 70%, 
        #1A1A1A 100%
    );
    position: relative;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 30% 20%, rgba(255, 69, 0, 0.05) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 80%, rgba(220, 20, 60, 0.05) 0%, transparent 60%);
    pointer-events: none;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-tertiary);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: var(--transition);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.feature-icon {
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: center;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.feature-list {
    list-style: none;
    text-align: left;
    margin: 0;
    padding: 0;
}

.feature-list li {
    color: var(--text-secondary);
    padding: 0.3rem 0;
    position: relative;
    padding-left: 1.5rem;
    font-size: 0.9rem;
}

.feature-list li::before {
    content: '•';
    color: var(--primary-color);
    font-weight: bold;
    position: absolute;
    left: 0;
}

/* About the Game Section */
.about-game {
    padding: 100px 0;
    background: linear-gradient(135deg, 
        #0A0A0A 0%, 
        #0A0A1A 25%, 
        #1A0505 50%, 
        #0A0A0A 75%, 
        #0A051A 100%
    );
    position: relative;
}

.about-game::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 25% 25%, rgba(139, 0, 0, 0.04) 0%, transparent 50%),
                radial-gradient(circle at 75% 75%, rgba(75, 0, 130, 0.03) 0%, transparent 50%);
    pointer-events: none;
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-section {
    margin-bottom: 4rem;
}

.about-section h3 {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    text-align: center;
}

.about-section > p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 2rem;
    text-align: center;
}

.gameplay-steps {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.step-item {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.step-item:hover {
    transform: translateX(10px);
    border-color: var(--primary-color);
}

.step-number {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.step-content h4 {
    color: var(--text-primary);
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.step-content p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.reasons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.reason-item {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.reason-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

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

.reason-item h4 {
    color: var(--text-primary);
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
}

.reason-item p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* FAQ Section */
.faq {
    padding: 100px 0;
    background: linear-gradient(180deg, 
        #1A1A1A 0%, 
        #150A15 25%, 
        #1A0505 50%, 
        #0A0A1A 75%, 
        #1A1A1A 100%
    );
    position: relative;
}

.faq::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 40% 30%, rgba(255, 69, 0, 0.04) 0%, transparent 70%),
                radial-gradient(ellipse at 60% 70%, rgba(128, 0, 128, 0.04) 0%, transparent 70%);
    pointer-events: none;
}

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

.faq-item {
    background: var(--bg-tertiary);
    border-radius: 12px;
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: var(--transition);
}

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

.faq-question {
    padding: 1.5rem 2rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.faq-question:hover {
    background: rgba(255, 69, 0, 0.05);
}

.faq-question h3 {
    color: var(--text-primary);
    font-size: 1.2rem;
    margin: 0;
}

.faq-toggle {
    color: var(--primary-color);
    font-size: 1.5rem;
    font-weight: bold;
    transition: var(--transition);
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 2rem;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 200px;
    padding: 0 2rem 1.5rem;
}

.faq-answer p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* 游戏截图 */
.screenshots {
    padding: 100px 0;
    background: linear-gradient(135deg, 
        #0A0A0A 0%, 
        #1A0A0A 20%, 
        #0A051A 40%, 
        #150505 60%, 
        #0A0A1A 80%, 
        #0A0A0A 100%
    );
    position: relative;
}

.screenshots::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 40%, rgba(220, 20, 60, 0.05) 0%, transparent 60%),
                radial-gradient(circle at 80% 60%, rgba(139, 0, 0, 0.04) 0%, transparent 60%);
    pointer-events: none;
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.screenshot-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    aspect-ratio: 16/9;
    cursor: pointer;
    transition: var(--transition);
}

.screenshot-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.screenshot-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.9));
    padding: 2rem 1rem 1rem;
    transform: translateY(100%);
    transition: var(--transition);
}

.screenshot-overlay span {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1.1rem;
    display: block;
    margin-bottom: 0.5rem;
}

.screenshot-overlay p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.4;
    margin: 0 0 1rem 0;
}

.screenshot-features {
    list-style: none;
    padding: 0;
    margin: 0;
}

.screenshot-features li {
    color: var(--text-secondary);
    font-size: 0.85rem;
    padding: 0.2rem 0;
    position: relative;
    padding-left: 1rem;
    line-height: 1.3;
}

.screenshot-features li::before {
    content: '•';
    color: var(--primary-color);
    font-weight: bold;
    position: absolute;
    left: 0;
}

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

.screenshot-item:hover img {
    transform: scale(1.1);
}

.screenshot-item:hover {
    box-shadow: 0 10px 30px rgba(255, 69, 0, 0.3);
}

/* 下载区域 */
.download {
    padding: 100px 0;
    background: linear-gradient(180deg, 
        #1A1A1A 0%, 
        #1A0A0A 20%, 
        #0A0A1A 40%, 
        #150A0A 60%, 
        #0A051A 80%, 
        #1A1A1A 100%
    );
    position: relative;
}

.download::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 35% 25%, rgba(255, 69, 0, 0.06) 0%, transparent 65%),
                radial-gradient(ellipse at 65% 75%, rgba(220, 20, 60, 0.06) 0%, transparent 65%);
    pointer-events: none;
}

.download-content {
    text-align: center;
    max-width: 1000px;
    margin: 0 auto;
}

.download-modules {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 3rem;
}

.download-module {
    background: var(--bg-tertiary);
    border-radius: 16px;
    padding: 2.5rem;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.download-module::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: var(--transition);
}

.download-module:hover::before {
    transform: scaleX(1);
}

.download-module:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
}

.module-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
    text-align: left;
}

.module-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.demo-icon {
    background: linear-gradient(135deg, rgba(255, 69, 0, 0.1), rgba(255, 107, 53, 0.1));
    border: 2px solid var(--primary-color);
}

.steam-icon {
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.1), rgba(74, 144, 226, 0.2));
    border: 2px solid #4A90E2;
}

.module-title h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 0.3rem;
}

.module-title p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin: 0;
}

.module-description {
    text-align: left;
    margin-bottom: 2rem;
}

.module-description p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 1rem;
}

.module-specs {
    margin-bottom: 2rem;
}

.spec-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--border-color);
}

.spec-item:last-child {
    border-bottom: none;
}

.spec-label {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.spec-value {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.95rem;
}

.price-free {
    color: #00C851;
    font-weight: bold;
}

.price-tbd {
    color: var(--secondary-color);
    font-weight: bold;
}

.btn-demo {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    font-size: 1.1rem;
    padding: 14px 28px;
    box-shadow: 0 4px 15px rgba(255, 69, 0, 0.4);
    width: 100%;
    justify-content: center;
}

.btn-demo:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 69, 0, 0.6);
}

.btn-steam {
    background: linear-gradient(135deg, #4A90E2, #357ABD);
    color: white;
    font-size: 1.1rem;
    padding: 14px 28px;
    box-shadow: 0 4px 15px rgba(74, 144, 226, 0.4);
    width: 100%;
    justify-content: center;
}

.btn-steam:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(74, 144, 226, 0.6);
}

/* Why Download Section */
.why-download {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.why-download h4 {
    color: var(--text-primary);
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

.download-benefits {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.benefit-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: rgba(255, 69, 0, 0.05);
    border-radius: 8px;
    border: 1px solid rgba(255, 69, 0, 0.1);
    transition: var(--transition);
}

.benefit-item:hover {
    border-color: var(--primary-color);
    background: rgba(255, 69, 0, 0.1);
}

.benefit-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-color);
    border-radius: 8px;
    flex-shrink: 0;
}

.benefit-text h5 {
    color: var(--text-primary);
    font-size: 1rem;
    margin-bottom: 0.3rem;
}

.benefit-text p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0;
    line-height: 1.4;
}

/* Installation Guide */
.installation-guide {
    padding: 100px 0;
    background: linear-gradient(135deg, 
        #0A0A0A 0%, 
        #0A051A 25%, 
        #1A0505 50%, 
        #0A0A1A 75%, 
        #0A0A0A 100%
    );
    position: relative;
}

.installation-guide::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 70%, rgba(139, 0, 0, 0.05) 0%, transparent 60%),
                radial-gradient(circle at 70% 30%, rgba(75, 0, 130, 0.04) 0%, transparent 60%);
    pointer-events: none;
}

.installation-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.install-step {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    text-align: center;
    position: relative;
}

.install-step:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.step-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.install-step .step-number {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.5rem;
    box-shadow: 0 4px 15px rgba(255, 69, 0, 0.3);
}

.step-header h3 {
    color: var(--text-primary);
    font-size: 1.3rem;
    margin: 0;
}

.install-step p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.step-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.8rem;
    padding: 1.5rem;
    background: var(--bg-tertiary);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.step-visual span {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.95rem;
}

.security-step {
    grid-column: 1 / -1;
    max-width: 600px;
    margin: 0 auto;
}

.security-notice {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: rgba(255, 165, 0, 0.1);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 165, 0, 0.3);
    margin-top: 1rem;
}

.warning-icon {
    flex-shrink: 0;
}

.security-text {
    color: var(--text-secondary);
    line-height: 1.5;
}

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

/* 页脚 */
.footer {
    background: var(--bg-primary);
    padding: 3rem 0 2rem;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    align-items: center;
}

.footer-info h3 {
    font-family: 'Creepster', cursive;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.footer-info p {
    color: var(--text-muted);
}

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

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

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

.footer-social {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

.social-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    transition: var(--transition);
}

.social-link:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    z-index: 1000;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--secondary-color);
    transform: translateY(-3px);
}

/* 响应式设计 */
@media (max-width: 1024px) and (min-width: 769px) {
    .screenshots-grid {
        grid-template-columns: 1fr 1fr;
        gap: 1.5rem;
    }
    
    .screenshot-item:last-child {
        grid-column: 1 / -1;
        max-width: 50%;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--bg-primary);
        flex-direction: column;
        justify-content: start;
        align-items: center;
        padding-top: 2rem;
        transition: var(--transition);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .screenshots-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .download-modules {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-links,
    .footer-social {
        justify-content: center;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .reasons-grid {
        grid-template-columns: 1fr;
    }
    
    .step-item {
        flex-direction: column;
        text-align: center;
    }
    
    .step-number {
        align-self: center;
    }
    
    .about-section h3 {
        font-size: 1.8rem;
    }
    
    .installation-steps {
        grid-template-columns: 1fr;
    }
    
    .security-step {
        grid-column: 1;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
    
    .btn-download {
        padding: 14px 28px;
        font-size: 1.1rem;
    }
}

/* 滚动动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* 加载动画 */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.loading {
    animation: pulse 1.5s ease-in-out infinite;
}