/* ============================================
   PHPer 官网样式
   深色开发者主题 - 绿色/青色配色
   ============================================ */

:root {
    /* 主色调 - 绿色系 (PHP 象征) */
    --color-primary: #10b981;
    --color-primary-light: #34d399;
    --color-primary-dark: #059669;
    
    /* 强调色 - 青色 */
    --color-accent: #06b6d4;
    --color-accent-light: #22d3ee;
    
    /* 背景色 - 深色 */
    --color-bg: #0a0f1a;
    --color-bg-secondary: #111827;
    --color-bg-tertiary: #1f2937;
    --color-bg-card: rgba(17, 24, 39, 0.8);
    
    /* 文字色 */
    --color-text: #f9fafb;
    --color-text-secondary: #9ca3af;
    --color-text-muted: #6b7280;
    
    /* 边框 */
    --color-border: rgba(255, 255, 255, 0.1);
    --color-border-light: rgba(255, 255, 255, 0.05);
    
    /* 状态色 */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    
    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    --gradient-glow: radial-gradient(circle, var(--color-primary) 0%, transparent 70%);
    
    /* 字体 */
    --font-mono: 'JetBrains Mono', 'Consolas', monospace;
    --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* 尺寸 */
    --header-height: 72px;
    --container-width: 1200px;
    --border-radius: 12px;
    --border-radius-lg: 20px;
    
    /* 动画 */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ============================================
   基础样式
   ============================================ */

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--color-primary-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

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

code {
    font-family: var(--font-mono);
    background: var(--color-bg-tertiary);
    padding: 0.2em 0.4em;
    border-radius: 4px;
    font-size: 0.9em;
}

/* ============================================
   背景装饰
   ============================================ */

.bg-decoration {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.grid-lines {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
}

.glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.3;
}

.glow-1 {
    width: 600px;
    height: 600px;
    background: var(--color-primary);
    top: -200px;
    right: -200px;
    opacity: 0.15;
}

.glow-2 {
    width: 400px;
    height: 400px;
    background: var(--color-accent);
    bottom: 20%;
    left: -100px;
    opacity: 0.1;
}

.glow-3 {
    width: 500px;
    height: 500px;
    background: var(--color-primary-dark);
    bottom: -200px;
    right: 20%;
    opacity: 0.1;
}

/* ============================================
   容器
   ============================================ */

.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-primary);
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    padding: 6px 16px;
    border-radius: 20px;
    margin-bottom: 20px;
}

.section-title {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 18px;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

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

/* ============================================
   导航栏
   ============================================ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    z-index: 1000;
    background: rgba(10, 15, 26, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
    color: var(--color-text);
}

.logo:hover {
    color: var(--color-text);
}

.logo-icon {
    width: 32px;
    height: 32px;
    border-radius: 6px;
}

.logo-text {
    font-family: var(--font-mono);
}

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

.nav-links a {
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition-fast);
}

/* 移动端导航菜单 */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--color-bg-secondary);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition-base);
    }
    
    .nav-links.mobile-open {
        display: flex;
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    
    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
}

/* ============================================
   按钮
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--font-sans);
    font-size: 15px;
    font-weight: 600;
    padding: 12px 24px;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

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

.btn-sm {
    padding: 8px 16px;
    font-size: 14px;
}

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

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 20px rgba(16, 185, 129, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(16, 185, 129, 0.4);
    color: white;
}

.btn-outline {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-outline:hover {
    background: var(--color-bg-tertiary);
    border-color: var(--color-primary);
    color: var(--color-text);
}

.btn-ghost {
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-text);
}

/* ============================================
   Hero 区域
   ============================================ */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
    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;
    font-family: var(--font-mono);
    font-size: 14px;
    color: var(--color-primary);
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    padding: 8px 16px;
    border-radius: 24px;
    margin-bottom: 24px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

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

.hero-title {
    font-size: clamp(40px, 6vw, 64px);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
}

.title-line {
    display: block;
}

.hero-description {
    font-size: 18px;
    color: var(--color-text-secondary);
    margin-bottom: 32px;
    line-height: 1.8;
}

.hero-description .highlight {
    color: var(--color-primary-light);
    font-weight: 500;
}

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

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

.stat {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-family: var(--font-mono);
    font-size: 28px;
    font-weight: 700;
    color: var(--color-text);
}

.stat-label {
    font-size: 14px;
    color: var(--color-text-muted);
}

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

/* Hero Visual - Terminal */
.hero-visual {
    position: relative;
}

.terminal-window {
    background: var(--color-bg-secondary);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-border);
    overflow: hidden;
    box-shadow: 
        0 25px 50px -12px rgba(0, 0, 0, 0.5),
        0 0 0 1px rgba(255, 255, 255, 0.05);
}

.terminal-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: var(--color-bg-tertiary);
    border-bottom: 1px solid var(--color-border);
}

.terminal-buttons {
    display: flex;
    gap: 8px;
}

.terminal-buttons span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.btn-close { background: #ef4444; }
.btn-minimize { background: #f59e0b; }
.btn-maximize { background: #10b981; }

.terminal-title {
    flex: 1;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--color-text-muted);
}

.terminal-body {
    padding: 20px;
    font-family: var(--font-mono);
    font-size: 14px;
}

.service-row {
    display: grid;
    grid-template-columns: 32px 1fr auto auto;
    gap: 12px;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border-light);
}

.service-row:last-of-type {
    border-bottom: none;
}

.service-icon {
    font-size: 20px;
}

.service-name {
    color: var(--color-text);
}

.service-status {
    font-size: 12px;
    padding: 4px 12px;
    border-radius: 12px;
}

.service-status.running {
    color: var(--color-success);
    background: rgba(16, 185, 129, 0.1);
}

.service-status.stopped {
    color: var(--color-text-muted);
    background: rgba(107, 114, 128, 0.1);
}

.service-port {
    color: var(--color-text-muted);
    font-size: 13px;
}

.terminal-prompt {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--color-border-light);
}

.prompt-symbol {
    color: var(--color-primary);
}

.prompt-text {
    color: var(--color-text-secondary);
}

.cursor {
    width: 8px;
    height: 18px;
    background: var(--color-primary);
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* ============================================
   功能特性
   ============================================ */

.features {
    background: var(--color-bg-secondary);
}

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

.feature-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 32px;
    transition: all var(--transition-base);
}

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

.feature-card.feature-highlight {
    grid-column: span 1;
    grid-row: span 2;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(6, 182, 212, 0.05) 100%);
    border-color: rgba(16, 185, 129, 0.3);
}

.feature-icon {
    font-size: 40px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--color-text);
}

.feature-card p {
    color: var(--color-text-secondary);
    font-size: 15px;
    line-height: 1.6;
}

.feature-list {
    list-style: none;
    margin-top: 20px;
}

.feature-list li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 10px;
    color: var(--color-text-secondary);
    font-size: 14px;
}

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

/* ============================================
   截图展示
   ============================================ */

.screenshots {
    background: var(--color-bg);
}

.screenshot-tabs {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 40px;
}

.tab-btn {
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tab-btn:hover {
    color: var(--color-text);
    border-color: var(--color-primary);
}

.tab-btn.active {
    color: var(--color-primary);
    background: rgba(16, 185, 129, 0.1);
    border-color: var(--color-primary);
}

.screenshot-container {
    display: flex;
    justify-content: center;
}

.screenshot-frame {
    width: 100%;
    max-width: 1000px;
    background: var(--color-bg-secondary);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-border);
    overflow: hidden;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.4);
}

.screenshot-window-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    background: var(--color-bg-tertiary);
    border-bottom: 1px solid var(--color-border);
}

.window-buttons {
    display: flex;
    gap: 8px;
}

.window-buttons span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-text-muted);
}

.window-buttons span:nth-child(1) { background: #ef4444; }
.window-buttons span:nth-child(2) { background: #f59e0b; }
.window-buttons span:nth-child(3) { background: #10b981; }

.window-title {
    flex: 1;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--color-text-muted);
}

.screenshot-wrapper {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
}

.screenshot-img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.screenshot-img.active {
    opacity: 1;
}

/* ============================================
   更多功能
   ============================================ */

.more-features {
    background: var(--color-bg-secondary);
    padding: 60px 0;
}

.features-banner {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.banner-content {
    text-align: center;
    padding: 24px;
}

.banner-content h3 {
    font-size: 18px;
    margin-bottom: 12px;
    color: var(--color-text);
}

.banner-content p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ============================================
   服务表格
   ============================================ */

.services {
    background: var(--color-bg);
}

.services-table {
    max-width: 800px;
    margin: 0 auto;
    background: var(--color-bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    overflow: hidden;
}

.table-row {
    display: grid;
    grid-template-columns: 180px 1fr 1fr;
    gap: 20px;
    padding: 16px 24px;
    border-bottom: 1px solid var(--color-border-light);
    align-items: center;
}

.table-row:last-child {
    border-bottom: none;
}

.table-row.table-header {
    background: var(--color-bg-tertiary);
    font-weight: 600;
    font-size: 14px;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table-row .service-name {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 500;
}

.table-row .emoji {
    font-size: 20px;
}

.table-row .source a {
    color: var(--color-primary-light);
}

.table-row .desc {
    color: var(--color-text-muted);
    font-size: 14px;
}

/* ============================================
   FAQ
   ============================================ */

.faq {
    background: var(--color-bg-secondary);
}

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

.faq-item {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    margin-bottom: 16px;
    overflow: hidden;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 20px 24px;
    background: none;
    border: none;
    font-family: var(--font-sans);
    font-size: 16px;
    font-weight: 500;
    color: var(--color-text);
    text-align: left;
    cursor: pointer;
    transition: var(--transition-fast);
}

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

.faq-icon {
    width: 20px;
    height: 20px;
    color: var(--color-text-muted);
    transition: transform var(--transition-fast);
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    display: none;
    padding: 0 24px 20px;
    color: var(--color-text-secondary);
    font-size: 15px;
    line-height: 1.7;
}

.faq-item.active .faq-answer {
    display: block;
}

.faq-answer ul {
    margin-top: 12px;
    padding-left: 20px;
}

.faq-answer li {
    margin-bottom: 8px;
}

/* ============================================
   技术栈
   ============================================ */

.tech-stack {
    background: var(--color-bg);
    padding: 60px 0;
}

.tech-content {
    text-align: center;
}

.tech-content h3 {
    font-size: 20px;
    margin-bottom: 24px;
    color: var(--color-text);
}

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

.tech-tag {
    font-family: var(--font-mono);
    font-size: 14px;
    color: var(--color-text-secondary);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    padding: 8px 16px;
    border-radius: 6px;
}

/* ============================================
   CTA 区域
   ============================================ */

.cta {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(6, 182, 212, 0.05) 100%);
    border-top: 1px solid rgba(16, 185, 129, 0.2);
    border-bottom: 1px solid rgba(16, 185, 129, 0.2);
}

.cta-content {
    text-align: center;
}

.cta-content h2 {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 700;
    margin-bottom: 16px;
}

.cta-content p {
    font-size: 18px;
    color: var(--color-text-secondary);
    margin-bottom: 32px;
}

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

/* ============================================
   页脚
   ============================================ */

.footer {
    background: var(--color-bg);
    padding: 60px 0 40px;
    border-top: 1px solid var(--color-border);
}

.footer-content {
    text-align: center;
}

.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
}

.footer-text {
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 24px;
}

.footer-links a {
    color: var(--color-text-muted);
    font-size: 14px;
}

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

.copyright {
    font-size: 14px;
    color: var(--color-text-muted);
}

/* ============================================
   响应式设计
   ============================================ */

@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        order: 1;
    }
    
    .hero-visual {
        order: 2;
        max-width: 600px;
        margin: 0 auto;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .feature-card.feature-highlight {
        grid-column: span 2;
        grid-row: span 1;
    }
    
    .features-banner {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .hero {
        min-height: auto;
        padding: 120px 0 60px;
    }
    
    .hero-description br {
        display: none;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: 24px;
    }
    
    .stat-divider {
        display: none;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-card.feature-highlight {
        grid-column: span 1;
    }
    
    .screenshot-tabs {
        gap: 8px;
    }
    
    .tab-btn {
        padding: 8px 12px;
        font-size: 12px;
    }
    
    .features-banner {
        grid-template-columns: 1fr;
    }
    
    .table-row {
        grid-template-columns: 1fr;
        gap: 8px;
    }
    
    .table-row.table-header {
        display: none;
    }
    
    .cta-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 16px;
    }
}

/* ============================================
   动画
   ============================================ */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-badge,
.hero-title,
.hero-description,
.hero-actions,
.hero-stats {
    animation: fadeInUp 0.6s ease-out backwards;
}

.hero-badge { animation-delay: 0.1s; }
.hero-title { animation-delay: 0.2s; }
.hero-description { animation-delay: 0.3s; }
.hero-actions { animation-delay: 0.4s; }
.hero-stats { animation-delay: 0.5s; }

.terminal-window {
    animation: fadeInUp 0.8s ease-out 0.3s backwards;
}

.service-row {
    animation: fadeInUp 0.4s ease-out backwards;
}

.service-row:nth-child(1) { animation-delay: 0.5s; }
.service-row:nth-child(2) { animation-delay: 0.6s; }
.service-row:nth-child(3) { animation-delay: 0.7s; }
.service-row:nth-child(4) { animation-delay: 0.8s; }
.service-row:nth-child(5) { animation-delay: 0.9s; }

/* 滚动动画 */
.feature-card,
.faq-item,
.table-row:not(.table-header) {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.feature-card.visible,
.faq-item.visible,
.table-row.visible {
    opacity: 1;
    transform: translateY(0);
}