/* OBS Studio 中文投放页样式 */

/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* CSS 变量 */
:root {
    --obs-primary: #1e1e1e;
    --obs-secondary: #2d2d2d;
    --obs-accent: #4a90e2;
    --obs-accent-light: #5ba0f2;
    --obs-success: #10b981;
    --obs-warning: #f59e0b;
    --obs-danger: #ef4444;
    
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --text-muted: #888888;
    --text-dark: #333333;
    
    --bg-primary: #0f0f0f;
    --bg-secondary: #1a1a1a;
    --bg-card: #1f1f1f;
    --bg-light: #f8f9fa;
    
    --border-color: #3a3a3a;
    --border-light: #e5e7eb;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px rgba(74, 144, 226, 0.3);
    
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 50px;
    
    --transition: all 0.3s ease;
    --transition-fast: all 0.15s ease;
    
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
}

/* 基础样式 */
html {
    scroll-behavior: smooth;
}

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

/* 导航栏 */
.navbar {
    background: rgba(30, 30, 30, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-logo {
    width: 40px;
    height: 40px;
    background: transparent;
    border-radius: 0;
    object-fit: contain;
}

.brand-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.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;
    padding: 0.5rem 0;
}

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

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

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

.cta-btn {
    background: var(--obs-accent);
    color: var(--text-primary);
    padding: 12px 24px;
    border-radius: var(--radius-full);
    text-decoration: none;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
}

.cta-btn:hover {
    background: var(--obs-accent-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

/* 主要内容 */
.main-content {
    padding-top: 70px;
}

/* Hero 区域 */
.hero-section {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, rgba(74, 144, 226, 0.1) 0%, transparent 70%);
}

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

.hero-content {
    animation: slideInLeft 0.8s ease-out;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(74, 144, 226, 0.1);
    border: 1px solid rgba(74, 144, 226, 0.3);
    color: var(--obs-accent);
    padding: 8px 16px;
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 2rem;
}

.hero-badge i {
    color: #fbbf24;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--obs-accent), var(--obs-accent-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.hero-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 2rem;
}

.version-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2.5rem;
}

.version-tag {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 8px 12px;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 600;
}

.version-tag i {
    color: #fbbf24;
}

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

.main-download {
    margin-bottom: 2rem;
}

.download-btn-main {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: linear-gradient(135deg, var(--obs-accent), var(--obs-accent-light));
    color: var(--text-primary);
    padding: 20px 24px;
    border-radius: var(--radius-lg);
    text-decoration: none;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
}

.download-btn-main:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
}

.btn-icon {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.btn-text {
    flex: 1;
}

.btn-title {
    display: block;
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 2px;
}

.btn-subtitle {
    display: block;
    font-size: 0.8rem;
    opacity: 0.9;
}

.btn-arrow {
    font-size: 1.2rem;
    opacity: 0.8;
}

.quick-features {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.feature-chip {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(16, 185, 129, 0.1);
    color: var(--obs-success);
    padding: 6px 12px;
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.feature-chip i {
    font-size: 0.8rem;
}

/* 软件界面预览 */
.hero-visual {
    animation: slideInRight 0.8s ease-out;
}

.software-preview {
    background: transparent;
    border: none;
    border-radius: 0;
    overflow: visible;
    box-shadow: none;
}

.software-preview:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

/* 右侧预览：单张横幅图展示 */
.hero-solo-image { display: block; width: 100%; height: auto; border-radius: 0; box-shadow: none; }

/* 功能特色区域 */
.features-section {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.features-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

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

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

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

.feature-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.05) 0%, transparent 100%);
    opacity: 0;
    transition: var(--transition);
}

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

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--obs-accent);
    box-shadow: var(--shadow-glow);
}

.feature-card > * {
    position: relative;
    z-index: 2;
}

/* 隐藏功能卡片顶部图标，避免与示意图重复占位 */
.feature-icon { display: none; }

.feature-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.feature-illustration {
    margin: 0 0 1rem 0;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-color);
    height: 220px; /* 统一高度，保持三列对齐 */
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
}

.feature-illustration img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain; /* 完整展示图片，不裁切 */
    display: block;
}

@media (max-width: 768px) {
    .feature-illustration { height: 180px; }
}

.feature-details {
    list-style: none;
    margin-top: 1rem;
}

.feature-details li {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 4px;
    position: relative;
    padding-left: 16px;
}

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

/* 下载区域 */
.download-section {
    padding: 100px 0;
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
}

.download-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, rgba(74, 144, 226, 0.1) 0%, transparent 70%);
}

.download-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
    z-index: 2;
}

.download-header {
    text-align: center;
    margin-bottom: 3rem;
}

.download-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.download-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

.download-card-main {
    background: var(--bg-card);
    border: 2px solid var(--obs-accent);
    border-radius: var(--radius-xl);
    padding: 2rem;
    margin-bottom: 3rem;
    box-shadow: var(--shadow-glow);
    transition: var(--transition);
}

.download-card-main:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 50px -12px rgba(74, 144, 226, 0.3);
}

.download-info {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.download-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--obs-accent), var(--obs-accent-light));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.download-details h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.version-details {
    display: flex;
    gap: 1rem;
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
}

.version,
.size,
.date {
    background: rgba(74, 144, 226, 0.1);
    color: var(--obs-accent);
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 600;
}

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

.download-btn-primary {
    background: linear-gradient(135deg, var(--obs-accent), var(--obs-accent-light));
    color: var(--text-primary);
    padding: 16px 32px;
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
}

.download-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.download-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.feature-highlight {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition: var(--transition);
}

.feature-highlight:hover {
    border-color: var(--obs-accent);
    transform: translateY(-2px);
}

.feature-highlight i {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--obs-accent), var(--obs-accent-light));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.highlight-text h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

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

.install-steps {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 2rem;
}

.install-steps h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    text-align: center;
}

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

.step-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.step-number {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--obs-accent), var(--obs-accent-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
}

.step-content h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

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

/* 帮助区域 */
.help-section {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.help-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

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

.help-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
}

.help-card:hover {
    transform: translateY(-5px);
    border-color: var(--obs-accent);
    box-shadow: var(--shadow-glow);
}

.help-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--obs-accent), var(--obs-accent-light));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 0 auto 1.5rem;
}

.help-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

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

.help-link {
    color: var(--obs-accent);
    text-decoration: none;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition);
}

.help-link:hover {
    color: var(--obs-accent-light);
    gap: 12px;
}

/* 页脚 */
.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 30px;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.footer-main {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 1rem;
}

.footer-logo-img {
    width: 32px;
    height: 32px;
    background: transparent;
    border-radius: 0;
    object-fit: contain;
}

.footer-logo span {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
}

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

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

.link-group h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.link-group ul {
    list-style: none;
}

.link-group li {
    margin-bottom: 8px;
}

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

.link-group a:hover {
    color: var(--obs-accent);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.footer-info p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 5px;
}

/* 动画 */
@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

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

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

/* 滚动指示器 */
.scroll-indicator {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(to right, var(--obs-accent), var(--obs-accent-light));
    transform-origin: left;
    transform: scaleX(0);
    z-index: 1001;
    transition: transform 0.1s ease;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .footer-main {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.4rem;
    }
    
    .features-grid,
    .help-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .download-features {
        grid-template-columns: 1fr;
    }
    
    .download-info {
        flex-direction: column;
        text-align: center;
    }
    
    .version-details {
        justify-content: center;
    }
    
    .quick-features {
        justify-content: center;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .download-title {
        font-size: 2rem;
    }
    
    .nav-container {
        padding: 0 1rem;
    }
    
    .hero-container,
    .features-container,
    .download-container,
    .help-container,
    .footer-container {
        padding: 0 1rem;
    }
}

/* 占位符图片样式 */
img[src*="placeholder"] {
    background: linear-gradient(45deg, #333 25%, transparent 25%, transparent 75%, #333 75%, #333),
                linear-gradient(45deg, #333 25%, transparent 25%, transparent 75%, #333 75%, #333);
    background-size: 20px 20px;
    background-position: 0 0, 10px 10px;
    border: 2px dashed #555;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #888;
    font-size: 12px;
    font-weight: bold;
    position: relative;
}

img[src*="placeholder"]::after {
    content: "占位符";
    position: absolute;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 4px 8px;
    border-radius: 3px;
    font-size: 10px;
}