/* ==================== 
   变量定义
   ==================== */
:root {
    /* 背景色 */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    
    /* 主题色 */
    --accent-blue: #2563eb;
    --accent-blue-light: #3b82f6;
    --accent-blue-dark: #1d4ed8;
    --accent-purple: #7c3aed;
    --accent-cyan: #06b6d4;
    --gradient-blue: linear-gradient(135deg, #2563eb 0%, #7c3aed 50%, #06b6d4 100%);
    
    /* 品牌色 */
    --accent-claude: #d97706;
    --accent-gpt: #10a37f;
    
    /* 文字颜色 */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    /* 边框颜色 */
    --border-color: #e2e8f0;
    --border-hover: #cbd5e1;
}

/* ==================== 
   基础样式
   ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ==================== 
   顶部导航
   ==================== */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 16px 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 16px;
    text-decoration: none;
    opacity: 0;
    animation: logoFadeIn 0.6s ease 0.1s forwards;
}

@keyframes logoFadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
}

.logo-main {
    font-family: 'Sora', sans-serif;
    font-size: 36px;
    font-weight: 700;
    background: var(--gradient-blue);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -1.5px;
}

.logo-cn {
    font-family: 'Sora', sans-serif;
    font-size: 32px;
    font-weight: 600;
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 50%, #ea580c 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 4px;
    position: relative;
}

.logo-cn::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 50%;
    transform: translateY(-50%);
    width: 2px;
    height: 24px;
    background: linear-gradient(180deg, transparent 0%, #cbd5e1 50%, transparent 100%);
}

/* 导航链接 */
.nav-links {
        display: flex;
    display: flex;
    gap: 36px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-blue);
    transition: width 0.3s ease;
}

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

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

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    width: 40px;
    height: 40px;
    background: var(--bg-secondary);
    border: none;
    border-radius: 10px;
    cursor: pointer;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

.mobile-menu-btn span {
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* ==================== 
   Hero 主视觉区
   ==================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 230px 0 100px;
    position: relative;
    overflow: hidden;
    background: linear-gradient(180deg, #f0f7ff 0%, #ffffff 100%);
}

/* 背景动画形状 */
.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    pointer-events: none;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.5;
    animation: float 20s ease-in-out infinite;
}

.shape-1 {
    width: 600px;
    height: 600px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.2), rgba(124, 58, 237, 0.1));
    top: -200px;
    right: -100px;
}

.shape-2 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.15), rgba(37, 99, 235, 0.1));
    bottom: -100px;
    left: -100px;
    animation-delay: -5s;
}

.shape-3 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.15), rgba(6, 182, 212, 0.1));
    top: 40%;
    left: 30%;
    animation-delay: -10s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -30px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(20px, 30px) scale(1.02); }
}

/* Hero 内容 */
.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 100px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 32px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    animation: fadeInDown 0.8s ease;
}

.hero-badge .dot {
    width: 8px;
    height: 8px;
    background: linear-gradient(135deg, #22c55e, #10b981);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(0.9); }
}

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

.hero h1 {
    font-family: 'Sora', sans-serif;
    font-size: clamp(40px, 6vw, 64px);
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -1px;
    animation: fadeInUp 0.8s ease 0.1s both;
}

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

.hero-desc {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease 0.2s both;
}

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

/* ==================== 
   服务板块 - 优化后的版本
   ==================== */
.service-section {
    display: flex;
    flex-direction: column;
    gap: 60px;
    margin-top: 100px;
}

.service-block {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    align-items: center;
    padding: 60px;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border-radius: 32px;
    border: 1px solid var(--border-color);
    opacity: 0;
    transform: translateY(60px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.service-block.animate-in {
    opacity: 1;
    transform: translateY(0);
}

/* 服务标签 */
.service-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 28px;
}

.tag {
    padding: 8px 16px;
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    border: 1px solid;
}

.tag.orange {
    color: #d97706;
    border-color: rgba(217, 119, 6, 0.3);
    background: rgba(217, 119, 6, 0.08);
}

.tag.green-dark {
    color: #059669;
    border-color: rgba(5, 150, 105, 0.3);
    background: rgba(5, 150, 105, 0.08);
}

.tag.green {
    color: #22c55e;
    border-color: rgba(34, 197, 94, 0.3);
    background: rgba(34, 197, 94, 0.08);
}

.tag.blue {
    color: #2563eb;
    border-color: rgba(37, 99, 235, 0.3);
    background: rgba(37, 99, 235, 0.08);
}

/* 服务主标题 */
.service-main-title {
    margin-bottom: 24px;
}

.brand-name {
    display: block;
    font-family: 'Sora', sans-serif;
    font-size: clamp(48px, 6vw, 64px);
    font-weight: 700;
    letter-spacing: -2px;
    line-height: 1.1;
    color: #1e293b;
}

.cn-title {
    display: block;
    font-family: 'Sora', sans-serif;
    font-size: clamp(36px, 5vw, 52px);
    font-weight: 700;
    letter-spacing: -1px;
    line-height: 1.2;
    background: var(--gradient-blue);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.service-desc {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 32px;
}

/* 按钮组 */
.service-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 18px 36px;
    border-radius: 14px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-family: inherit;
}

.btn-dark {
    background: #1e293b;
    color: white;
}

.btn-dark:hover {
    background: #0f172a;
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

.btn-ghost {
    background: white;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-ghost:hover {
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}

.btn-primary {
    background: var(--gradient-blue);
    color: white;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
    width: 100%;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.4);
}

/* 服务亮点 */
.service-highlights {
    display: flex;
    flex-wrap: wrap;
    gap: 20px 32px;
    font-size: 14px;
    color: var(--text-secondary);
}

.check-icon {
    color: #22c55e;
    font-style: normal;
    font-weight: 600;
    margin-right: 4px;
}

/* 状态卡片 */
.status-card {
    background: white;
    border-radius: 24px;
    padding: 32px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
    border: 1px solid var(--border-color);
}

.status-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 28px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.status-label {
    display: block;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.status-title {
    display: block;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.status-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #22c55e;
    box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.2);
    animation: pulse 2s infinite;
}

.status-item {
    padding: 16px 0;
    border-bottom: 1px solid var(--border-color);
}

.status-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.status-item-label {
    display: block;
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.status-item-value {
    display: block;
    font-family: 'Sora', sans-serif;
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

/* ==================== 
   通用区块样式
   ==================== */
.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 64px;
}

.section-label {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: white;
    background: var(--gradient-blue);
    padding: 8px 16px;
    border-radius: 100px;
    margin-bottom: 20px;
}

.section-title {
    font-family: 'Sora', sans-serif;
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 17px;
    line-height: 1.7;
}

/* ==================== 
   优势展示区
   ==================== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.feature-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 36px;
    transition: all 0.5s ease;
}

.feature-card:hover {
    border-color: #93c5fd;
    transform: translateY(-6px);
    box-shadow: 0 20px 50px rgba(37, 99, 235, 0.12);
    background: linear-gradient(180deg, #f0f9ff 0%, #ffffff 100%);
}

.feature-icon-wrap {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #eff6ff, #dbeafe);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: var(--accent-blue);
    transition: all 0.4s ease;
}

.feature-card:hover .feature-icon-wrap {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    color: white;
    transform: scale(1.1);
}

.feature-card h4 {
    font-family: 'Sora', sans-serif;
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    transition: color 0.4s ease;
}

.feature-card:hover h4 {
    color: #1e40af;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.8;
}

/* ==================== 
   定价区
   ==================== */
.pricing-section {
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    max-width: 900px;
    margin: 0 auto;
}

.pricing-card {
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 28px;
    padding: 44px;
    transition: all 0.4s ease;
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 30px 60px rgba(37, 99, 235, 0.12);
}

.pricing-header {
    text-align: center;
    margin-bottom: 32px;
}

.pricing-logo-new {
    font-family: 'Sora', sans-serif;
    font-size: 38px;
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: 8px;
}

.pricing-logo-new.claude {
    background: linear-gradient(135deg, #d97706 0%, #f59e0b 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.pricing-logo-new.gpt {
    background: linear-gradient(135deg, #059669 0%, #10b981 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.pricing-desc {
    color: var(--text-secondary);
    font-size: 15px;
}

.pricing-price {
    text-align: center;
    margin-bottom: 32px;
    padding: 28px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.price-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 8px;
}


.price-original {
    font-family: 'Sora', sans-serif;
    font-size: 24px;
    font-weight: 600;
    color: #94a3b8;
    position: relative;
    text-decoration: line-through;
    text-decoration-color: #ef4444;
    text-decoration-thickness: 2px;
}

.price-value {
    font-family: 'Sora', sans-serif;
    font-size: 52px;
    font-weight: 700;
    background: var(--gradient-blue);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.price-unit {
    font-size: 18px;
    color: var(--text-muted);
    font-weight: 500;
}


.price-save {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
    padding: 6px 14px;
    border-radius: 100px;
    letter-spacing: 0.5px;
}

.pricing-features {
    list-style: none;
    margin-bottom: 32px;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 0;
    font-size: 15px;
    color: var(--text-secondary);
}

.pricing-features li::before {
    content: '✓';
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, #dbeafe, #eff6ff);
    color: var(--accent-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}

/* ==================== 
   FAQ 常见问题
   ==================== */
.faq-section {
    background: white;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-item-static {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 32px 36px;
    transition: all 0.3s ease;
}

.faq-item-static:hover {
    border-color: #bfdbfe;
    background: linear-gradient(180deg, #fafcff 0%, #ffffff 100%);
    box-shadow: 0 8px 30px rgba(37, 99, 235, 0.06);
}

.faq-q {
    font-family: 'Sora', sans-serif;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.faq-q::before {
    content: 'Q';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: linear-gradient(135deg, #eff6ff, #dbeafe);
    color: var(--accent-blue);
    border-radius: 8px;
    font-size: 14px;
    font-weight: 700;
    flex-shrink: 0;
}

.faq-a {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    padding-left: 40px;
}

/* ==================== 
   联系我们
   ==================== */
.contact-section {
    padding: 100px 0;
}

.contact-card {
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 50%, #e0e7ff 100%);
    border-radius: 32px;
    padding: 80px 40px;
    text-align: center;
}

.contact-title {
    font-family: 'Sora', sans-serif;
    font-size: clamp(28px, 5vw, 36px);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.contact-desc {
    color: var(--text-secondary);
    font-size: 16px;
    max-width: 460px;
    margin: 0 auto 40px;
    line-height: 1.8;
}

.wechat-box {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    padding: 40px 64px;
    background: white;
    border-radius: 24px;
    box-shadow: 0 10px 40px rgba(37, 99, 235, 0.1);
}

.wechat-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 3px;
}

.wechat-id {
    display: flex;
    align-items: center;
    gap: 20px;
}

.wechat-id > span {
    font-family: 'Sora', sans-serif;
    font-size: 36px;
    font-weight: 700;
    background: var(--gradient-blue);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.copy-btn {
    padding: 14px 32px;
    background: var(--gradient-blue);
    border: none;
    border-radius: 12px;
    color: white;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
}

.copy-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.3);
}

.work-hours {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ==================== 
   页脚
   ==================== */
footer {
    padding: 40px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

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

/* ==================== 
   滚动动画
   ==================== */
.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ==================== 
   响应式设计 - 平板
   ==================== */
@media (max-width: 1024px) {
    .container {
        padding: 0 20px;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
}

/* ==================== 
   响应式设计 - 手机
   ==================== */
@media (max-width: 900px) {
    .service-block {
        grid-template-columns: 1fr;
        padding: 40px 24px;
        gap: 32px;
    }
    
    .brand-name {
        font-size: 36px;
        letter-spacing: -1px;
    }
    
    .cn-title {
        font-size: 28px;
    }
    
    .service-actions {
        flex-direction: column;
    }
    
    .btn-dark, 
    .btn-ghost {
        width: 100%;
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .logo-main {
        font-size: 26px;
    }
    
    .logo-cn {
        font-size: 22px;
        letter-spacing: 2px;
    }
    
    .logo-cn::before {
        height: 20px;
        left: -6px;
    }
    
    .nav-links {
        display: flex;
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero {
        padding: 120px 0 60px;
        min-height: auto;
    }
    
    .hero h1 {
        font-size: 36px;
    }
    
    .hero-desc {
        font-size: 16px;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-logo-new {
        font-size: 30px;
    }
    
    .faq-item-static {
        padding: 24px 20px;
    }
    
    .faq-q {
        font-size: 16px;
    }
    
    .faq-a {
        font-size: 14px;
        padding-left: 34px;
    }
    
    .contact-card {
        padding: 48px 20px;
    }
    
    .wechat-box {
        padding: 32px 24px;
        width: 100%;
        max-width: 320px;
    }
    
    .wechat-id {
        flex-direction: column;
        gap: 16px;
    }
    
    .wechat-id > span {
        font-size: 28px;
    }
    
    .copy-btn {
        width: 100%;
    }
}

@media (max-width: 375px) {
    .hero h1 {
        font-size: 30px;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .pricing-logo-new {
        font-size: 26px;
    }
    
    .brand-name {
        font-size: 28px;
    }
    
    .cn-title {
        font-size: 22px;
    }
}

/* 移动端菜单激活状态 */
@media (max-width: 768px) {
    .nav-links {
        display: flex;
        position: fixed;
        top: 72px;
        right: -100%;
        width: 280px;
        height: auto; max-height: 400px;
        background: white;
        flex-direction: column;
        padding: 40px 24px;
        box-shadow: -4px 0 20px rgba(0,0,0,0.1);
        transition: right 0.3s ease;
        z-index: 99;
        gap: 24px;
    }
    
    .nav-links.active {
        right: 0;
    }
    
    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }
    
    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
}

/* 菜单背景遮罩 */
.menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 98;
}

.menu-overlay.active {
    display: block;
}

/* 隐藏移动端菜单按钮 */
.mobile-menu-btn {
    display: none !important;
}