/* ==========================================
   PalmTech Chat - 浅色科技风格样式系统
   ========================================== */

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

/* ========== CSS 变量系统 - 浅色主题 ========== */
:root {
    /* 主色调 - 现代科技蓝紫 */
    --primary: #0066ff;
    --primary-dark: #0052cc;
    --primary-light: #3385ff;
    --secondary: #8b5cf6;
    --secondary-dark: #7c3aed;
    --accent: #10b981;
    --accent-glow: #34d399;

    /* 背景色 - 浅色主题 */
    --bg-light: #ffffff;
    --bg-lighter: #f8fafc;
    --bg-lightest: #f1f5f9;
    --bg-dark: #e2e8f0;
    --bg-card: rgba(255, 255, 255, 0.95);
    --bg-card-hover: rgba(255, 255, 255, 1);
    --bg-glass: rgba(248, 250, 252, 0.8);

    /* 文字颜色 */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --text-dim: #94a3b8;

    /* 边框颜色 */
    --border: rgba(15, 23, 42, 0.08);
    --border-hover: rgba(15, 23, 42, 0.15);
    --border-glow: rgba(0, 102, 255, 0.3);

    /* 渐变效果 */
    --gradient-primary: linear-gradient(135deg, #0066ff 0%, #8b5cf6 100%);
    --gradient-secondary: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);
    --gradient-hero: linear-gradient(180deg, rgba(248, 250, 252, 1) 0%, rgba(241, 245, 249, 1) 100%);
    --gradient-card: linear-gradient(135deg, rgba(0, 102, 255, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
    --gradient-glow: radial-gradient(circle, rgba(0, 102, 255, 0.1) 0%, transparent 70%);

    /* 发光效果 - 更柔和 */
    --glow-primary: 0 0 15px rgba(0, 102, 255, 0.2), 0 0 30px rgba(0, 102, 255, 0.1);
    --glow-secondary: 0 0 15px rgba(139, 92, 246, 0.2), 0 0 30px rgba(139, 92, 246, 0.1);
    --glow-accent: 0 0 15px rgba(16, 185, 129, 0.2), 0 0 30px rgba(16, 185, 129, 0.1);

    /* 阴影系统 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 20px rgba(0, 102, 255, 0.15);
    --shadow-glow-hover: 0 0 30px rgba(0, 102, 255, 0.25), 0 0 60px rgba(0, 102, 255, 0.15);

    /* 间距系统 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --spacing-2xl: 8rem;

    /* 字体系统 */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
    --font-mono: 'JetBrains Mono', 'Consolas', monospace;

    /* 过渡动画 */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* 边角圆润度 */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;

    /* Z-index 层级 */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* ========== 全局样式 ========== */
html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-lighter);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
}

/* ========== 动态背景系统 - 浅色版 ========== */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 50%, rgba(0, 102, 255, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 50% 10%, rgba(16, 185, 129, 0.03) 0%, transparent 40%);
    z-index: -2;
    animation: backgroundPulse 20s ease-in-out infinite;
}

body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent 0%, rgba(0, 102, 255, 0.02) 50%, transparent 100%);
    z-index: -1;
    animation: scanline 10s linear infinite;
}

@keyframes backgroundPulse {
    0%, 100% {
        opacity: 0.5;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.05);
    }
}

@keyframes scanline {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(100%); }
}

/* ========== 粒子背景容器 ========== */
#particles-js {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -3;
    opacity: 0.4;
}

/* ========== 导航栏 ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
    z-index: var(--z-fixed);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.navbar::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-md);
    padding: 0.75rem 0;
}

.navbar.scrolled::before {
    opacity: 1;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
}

.logo::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

.logo:hover::after {
    width: 100%;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
    align-items: center;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all var(--transition-base);
    position: relative;
    padding: 0.5rem 0;
    letter-spacing: 0.3px;
}

.nav-menu a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

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

.nav-menu a:hover::before {
    width: 100%;
}

.nav-menu a.active {
    color: var(--primary);
    font-weight: 600;
}

.nav-menu a.active::before {
    width: 100%;
}

/* 移动端导航按钮 */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    transition: all var(--transition-base);
}

.mobile-menu-btn:hover {
    color: var(--primary);
    transform: scale(1.1);
}

/* ========== 按钮系统 ========== */
.btn {
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all var(--transition-base);
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
    font-family: var(--font-sans);
    letter-spacing: 0.3px;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
    position: relative;
}

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

.btn-primary:active {
    transform: translateY(0);
}

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

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

.btn-ghost {
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-ghost:hover {
    background: white;
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* 按钮组 */
.btn-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* ========== 卡片系统 ========== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: all var(--transition-slow);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 102, 255, 0.05), transparent);
    transition: left 0.5s;
}

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

.card:hover {
    transform: translateY(-5px);
    background: var(--bg-card-hover);
    border-color: var(--border-glow);
    box-shadow: var(--shadow-xl);
}

/* ========== 网格系统 ========== */
.grid {
    display: grid;
    gap: 2rem;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* ========== 容器系统 ========== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

.container-fluid {
    width: 100%;
    padding: 0 2rem;
}

.section {
    padding: var(--spacing-xl) 0;
    position: relative;
}

/* ========== 文字样式 ========== */
.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.glow-text {
    text-shadow: var(--glow-primary);
}

/* ========== 加载动画 ========== */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 骨架屏加载 */
.skeleton {
    background: linear-gradient(90deg, var(--bg-lightest) 25%, var(--bg-lighter) 50%, var(--bg-lightest) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-sm);
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

/* ========== 滚动条样式 ========== */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary), var(--secondary));
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--primary-dark), var(--secondary-dark));
}

/* ========== 选择文字样式 ========== */
::selection {
    background: var(--primary);
    color: white;
}

::-moz-selection {
    background: var(--primary);
    color: white;
}

/* ========== 页脚样式 ========== */
.footer {
    background: var(--bg-lightest);
    border-top: 1px solid var(--border);
    padding: var(--spacing-lg) 0 var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.footer-section p {
    color: var(--text-secondary);
    line-height: 1.8;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
}

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

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

.footer-bottom {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem 2rem 0;
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--text-muted);
}

.footer-bottom p {
    margin: 0.25rem 0;
}

.footer-bottom a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-base);
}

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

/* ========== 工具类 ========== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.d-flex { display: flex; }
.d-grid { display: grid; }
.d-block { display: block; }
.d-inline-block { display: inline-block; }
.d-none { display: none; }

.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }

.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 2rem; }
.mt-4 { margin-top: 3rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 2rem; }
.mb-4 { margin-bottom: 3rem; }

.pt-1 { padding-top: 0.5rem; }
.pt-2 { padding-top: 1rem; }
.pt-3 { padding-top: 2rem; }
.pt-4 { padding-top: 3rem; }

.pb-1 { padding-bottom: 0.5rem; }
.pb-2 { padding-bottom: 1rem; }
.pb-3 { padding-bottom: 2rem; }
.pb-4 { padding-bottom: 3rem; }

/* ========== 响应式断点 ========== */
@media (max-width: 1200px) {
    .container {
        max-width: 1140px;
    }
}

@media (max-width: 992px) {
    .container {
        max-width: 960px;
    }

    .nav-menu {
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    .container {
        max-width: 720px;
        padding: 0 1.5rem;
    }

    /* 移动端导航 */
    .mobile-menu-btn {
        display: block;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        border-bottom: 1px solid var(--border);
        transition: left var(--transition-base);
        box-shadow: var(--shadow-lg);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu a {
        font-size: 1.1rem;
    }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    .section {
        padding: var(--spacing-lg) 0;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 576px) {
    .container {
        max-width: 540px;
        padding: 0 1rem;
    }

    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.9rem;
    }

    .card {
        padding: 1.5rem;
    }
}

/* ========== 打印样式 ========== */
@media print {
    .navbar,
    .btn,
    .mobile-menu-btn {
        display: none !important;
    }

    body {
        background: white;
        color: black;
    }

    .card {
        border: 1px solid #ddd;
        page-break-inside: avoid;
    }
}

/* ========== 无障碍辅助 ========== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* 焦点可见性 */
*:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* ========== 性能优化 ========== */
.will-change-transform {
    will-change: transform;
}

.will-change-opacity {
    will-change: opacity;
}

/* GPU 加速 */
.gpu-accelerated {
    transform: translateZ(0);
    backface-visibility: hidden;
    perspective: 1000px;
}

/* ========== 页面头部样式 ========== */
.page-hero {
    padding: 8rem 0 4rem;
    text-align: center;
    background: var(--gradient-hero);
    border-bottom: 1px solid var(--border);
    position: relative;
}

.page-header {
    padding: calc(var(--spacing-xl) + 70px) 0 var(--spacing-xl);
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
    text-align: center;
}

.page-hero-content {
    position: relative;
    z-index: 1;
}

.page-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 900;
    margin-bottom: 1.5rem;
    letter-spacing: -1px;
}

.page-subtitle {
    font-size: 1.3rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.section-alt {
    background: var(--bg-lightest);
}

/* ========== 区域头部样式 ========== */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-badge {
    display: inline-block;
    background: var(--gradient-card);
    border: 1px solid var(--border);
    padding: 0.5rem 1.5rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3.5rem);
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -0.5px;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.7;
}

/* 页脚通用样式类 */
.footer-about {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-top: 1rem;
}

/* ========== 联系页面样式 ========== */
/* 联系信息网格 */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.contact-info-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.contact-info-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
}

.contact-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    display: block;
}

.contact-info-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.contact-info-card p {
    color: var(--text-secondary);
    margin: 0.5rem 0;
    font-size: 0.95rem;
}

/* 联系表单 */
.contact-form-wrapper {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 3rem;
    box-shadow: var(--shadow-lg);
}

.contact-form-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.contact-form-header h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.contact-form-header p {
    color: var(--text-secondary);
    font-size: 1rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.required {
    color: #ef4444;
    margin-left: 2px;
}

.form-group input,
.form-group textarea,
.form-group select {
    padding: 0.875rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-family: var(--font-sans);
    font-size: 1rem;
    background: var(--bg-light);
    color: var(--text-primary);
    transition: all var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

.form-group input.error,
.form-group textarea.error,
.form-group select.error {
    border-color: #ef4444;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.checkbox-label input[type="checkbox"] {
    margin-top: 0.25rem;
    cursor: pointer;
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
}

.link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-base);
}

.link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    width: 100%;
    justify-content: center;
}

.btn-icon {
    font-size: 1.5rem;
    transition: transform var(--transition-base);
}

.btn:hover .btn-icon {
    transform: translateX(5px);
}

/* 社交媒体部分 */
.social-section {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.social-section h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.social-section > p {
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    font-size: 1.05rem;
}

.social-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1.5rem;
    max-width: 700px;
    margin: 0 auto;
}

.social-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    padding: 1.5rem 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-primary);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.social-link:hover {
    transform: translateY(-3px);
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.social-icon {
    font-size: 2rem;
}

.social-link span {
    font-weight: 600;
    font-size: 0.9rem;
}

/* FAQ 快速链接 */
.faq-quick-links {
    text-align: center;
}

.faq-quick-links h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.faq-quick-links > p {
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    font-size: 1.05rem;
}

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

.faq-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-decoration: none;
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.faq-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
}

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

.faq-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

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

/* 页脚额外样式 */
.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.footer-desc {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

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

.social-icon-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-radius: 50%;
    text-decoration: none;
    font-size: 1.25rem;
    transition: all var(--transition-base);
}

.social-icon-link:hover {
    background: var(--primary);
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.footer-section h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-base);
    font-size: 0.95rem;
}

.footer-links a:hover {
    color: var(--primary);
    padding-left: 5px;
}

.footer-link {
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-base);
}

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

/* ========== 响应式优化 - 联系页面 ========== */
@media (max-width: 768px) {
    .page-title {
        font-size: 2.5rem;
    }

    .page-subtitle {
        font-size: 1.1rem;
    }

    .contact-form-wrapper {
        padding: 2rem 1.5rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

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

    .social-links {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (max-width: 576px) {
    .page-hero {
        padding: 6rem 0 3rem;
    }

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

    .social-links {
        grid-template-columns: 1fr;
    }

    .contact-form-wrapper {
        padding: 1.5rem 1rem;
    }
}