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

:root {
    /* Twitter主题色彩 */
    --twitter-blue: #1DA1F2;
    --twitter-blue-light: #71C9F8;
    --twitter-blue-dark: #0D8BD9;
    
    /* 辅助色彩 */
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, var(--twitter-blue) 0%, var(--twitter-blue-light) 100%);
    --gradient-bg: linear-gradient(135deg, #f8fafc 0%, #ffffff 50%, #f1f5f9 100%);
    --gradient-glass: linear-gradient(135deg, rgba(255,255,255,0.8) 0%, rgba(255,255,255,0.6) 100%);
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* 字体 */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-family-zh: 'Noto Sans SC', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-family-ja: 'Noto Sans JP', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--gray-800);
    overflow-x: hidden;
    background: var(--white);
}

/* 多语言字体支持 */
html[lang="zh"] body {
    font-family: var(--font-family-zh);
}

html[lang="ja"] body {
    font-family: var(--font-family-ja);
}

/* 动态背景 */
.background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.bg-gradient {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-bg);
    opacity: 1;
}

.bg-dots {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: radial-gradient(circle, rgba(29, 161, 242, 0.08) 1px, transparent 1px);
    background-size: 30px 30px;
    animation: dots-move 30s linear infinite;
    will-change: transform;
}

.bg-flow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(ellipse 800px 600px, rgba(29, 161, 242, 0.03), transparent);
    animation: flow-move 30s linear infinite;
    border-radius: 50%;
    will-change: transform;
    transform: translateZ(0);
}

@keyframes dots-move {
    0% { transform: translate(0, 0); }
    100% { transform: translate(30px, 30px); }
}

@keyframes flow-move {
    0% { transform: translate(0, 0) rotate(0deg); }
    100% { transform: translate(30px, 30px) rotate(360deg); }
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1rem 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(29, 161, 242, 0.1);
    z-index: 100;
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.brand-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.brand-logo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 12px;
}

.brand-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-800);
}

.nav-hint {
    display: none;
}

.hint-text {
    font-size: 0.875rem;
    color: var(--gray-600);
    background: rgba(29, 161, 242, 0.1);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    border: 1px solid rgba(29, 161, 242, 0.2);
}

/* 语言切换器 */
.language-selector {
    position: relative;
}

.language-dropdown {
    position: relative;
}

.language-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(29, 161, 242, 0.2);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.875rem;
    color: var(--gray-700);
    box-shadow: var(--shadow-sm);
}

.language-btn:hover {
    background: rgba(255, 255, 255, 1);
    border-color: var(--twitter-blue);
    box-shadow: var(--shadow-md);
}

.language-text {
    font-weight: 500;
}

.language-icon {
    transition: transform 0.3s ease;
}

.language-dropdown.active .language-icon {
    transform: rotate(180deg);
}

.language-menu {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    min-width: 140px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(29, 161, 242, 0.15);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 200;
}

.language-dropdown.active .language-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.language-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--gray-700);
    font-size: 0.875rem;
}

.language-option:first-child {
    border-radius: 12px 12px 0 0;
}

.language-option:last-child {
    border-radius: 0 0 12px 12px;
}

.language-option:hover {
    background: rgba(29, 161, 242, 0.1);
    color: var(--twitter-blue);
}

.language-option.active {
    background: rgba(29, 161, 242, 0.15);
    color: var(--twitter-blue);
    font-weight: 500;
}

.flag {
    font-size: 1rem;
}

/* Hero区域 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 6rem 0 4rem;
}

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

.hero-content {
    max-width: 500px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    color: var(--gray-900);
    text-shadow: none;
}

.gradient-text {
    background: linear-gradient(135deg, var(--twitter-blue), var(--twitter-blue-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--gray-600);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.cta-button {
    padding: 1rem 2rem;
    border-radius: 12px;
    border: none;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.cta-button.primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-lg);
}

.cta-button.primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.cta-button.secondary {
    background: rgba(255, 255, 255, 0.8);
    color: var(--gray-700);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(29, 161, 242, 0.2);
    box-shadow: var(--shadow-md);
}

.cta-button.secondary:hover {
    background: rgba(255, 255, 255, 0.95);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

/* Hero视觉卡片 */
.hero-visual {
    display: flex;
    justify-content: center;
}

.hero-card {
    width: 100%;
    max-width: 450px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    border: 1px solid rgba(29, 161, 242, 0.15);
    padding: 1.5rem;
    box-shadow: var(--shadow-xl);
    animation: float 8s cubic-bezier(0.4, 0, 0.2, 1) infinite;
    will-change: transform;
    transform: translateZ(0);
}

@keyframes float {
    0% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
    100% { transform: translateY(0); }
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(29, 161, 242, 0.1);
}

.card-dots {
    display: flex;
    gap: 0.5rem;
}

.card-dots span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--gray-300);
}

.card-dots span:first-child {
    background: #ff5f57;
}

.card-dots span:nth-child(2) {
    background: #ffbd2e;
}

.card-dots span:last-child {
    background: #28ca42;
}

.card-title {
    color: var(--gray-700);
    font-weight: 600;
    font-size: 0.875rem;
}

.feature-preview {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.preview-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    border-radius: 10px;
    transition: background-color 0.3s ease, color 0.3s ease;
    cursor: pointer;
    color: var(--gray-600);
    will-change: background-color, color;
}

.preview-item.active {
    background: rgba(29, 161, 242, 0.1);
    color: var(--twitter-blue);
}

.preview-item:hover {
    background: rgba(29, 161, 242, 0.05);
    color: var(--twitter-blue);
}

.preview-icon {
    font-size: 1.25rem;
}

/* Hero卡片预览图片 */
.card-preview-image {
    position: relative;
    height: 280px;
    border-radius: 12px;
    overflow: hidden;
    background: var(--gray-100);
}

.preview-screenshot {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transform: scale(0.98);
    transition: opacity 0.5s ease, transform 0.5s ease;
    border-radius: 12px;
    will-change: opacity, transform;
}

.preview-screenshot.active {
    opacity: 1;
    transform: scale(1);
}

/* 功能介绍区域 */
.features {
    padding: 6rem 0;
    background: rgba(29, 161, 242, 0.02);
}

.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: 700;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
}

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

.feature-card {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    padding: 2rem;
    border: 1px solid rgba(29, 161, 242, 0.1);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    background: rgba(255, 255, 255, 0.95);
    border-color: rgba(29, 161, 242, 0.2);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    margin-bottom: 1.5rem;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

.feature-description {
    color: var(--gray-600);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.feature-image {
    height: 240px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.feature-screenshot {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.feature-card:hover .feature-screenshot {
    transform: scale(1.02);
}

/* 移除旧的占位符样式 */
.image-placeholder {
    display: none;
}

/* 用户引导区域 */
.guide {
    padding: 6rem 0;
    background: var(--white);
}

.guide-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 2rem;
}

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

.guide-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

.guide-subtitle {
    font-size: 1.25rem;
    color: var(--gray-600);
    margin-bottom: 3rem;
}

.guide-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.step {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    border: 1px solid rgba(29, 161, 242, 0.1);
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
}

.step:hover {
    transform: translateY(-3px);
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-lg);
    border-color: rgba(29, 161, 242, 0.2);
}

.step-number {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.25rem;
    margin: 0 auto 1rem;
}

.step-content h3 {
    color: var(--gray-900);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.step-content p {
    color: var(--gray-600);
    font-size: 0.875rem;
}

/* 下载CTA区域 */
.download {
    padding: 6rem 0;
    background: rgba(29, 161, 242, 0.02);
}

.download-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 2rem;
}

.download-card {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 3rem;
    text-align: center;
    border: 1px solid rgba(29, 161, 242, 0.15);
    box-shadow: var(--shadow-xl);
}

.download-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

.download-subtitle {
    font-size: 1.125rem;
    color: var(--gray-600);
    margin-bottom: 2rem;
}

.download-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 2rem;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(29, 161, 242, 0.2);
    border-radius: 16px;
    color: var(--gray-700);
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    box-shadow: var(--shadow-md);
}

.download-btn:hover {
    background: rgba(255, 255, 255, 1);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.download-btn.chrome:hover {
    border-color: var(--twitter-blue);
    box-shadow: 0 8px 25px -8px rgba(29, 161, 242, 0.3);
}

.btn-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.btn-title {
    font-weight: 600;
    font-size: 1rem;
    color: var(--gray-800);
}

.btn-subtitle {
    font-size: 0.75rem;
    color: var(--gray-500);
}

.download-note {
    color: var(--gray-600);
    font-size: 0.875rem;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .nav-hint {
        display: block;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        gap: 3rem;
        text-align: center;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-card {
        max-width: 500px;
    }
    
    .card-preview-image {
        height: 320px;
    }
}

@media (max-width: 768px) {
    .nav-container {
        padding: 0 1rem;
    }
    
    .nav-right {
        gap: 1rem;
    }
    
    .nav-hint {
        display: none;
    }
    
    .language-btn {
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
    }
    
    .hero {
        padding: 4rem 0 2rem;
    }
    
    .hero-container {
        padding: 0 1rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }
    
    .hero-card {
        max-width: 100%;
    }
    
    .card-preview-image {
        height: 250px;
    }
    
    .feature-image {
        height: 200px;
    }
    
    .features-container,
    .guide-container,
    .download-container {
        padding: 0 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .download-btn {
        width: 100%;
        max-width: 300px;
    }
}

@media (max-width: 480px) {
    .nav-right {
        gap: 0.5rem;
    }
    
    .language-btn {
        padding: 0.3rem 0.6rem;
        font-size: 0.75rem;
    }
    
    .language-text {
        display: none; /* 在小屏幕上只显示图标 */
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .download-card {
        padding: 2rem;
    }
    
    .download-title {
        font-size: 1.75rem;
    }
    
    .card-preview-image {
        height: 200px;
    }
}

/* 成功页面样式 */
.success-page {
    min-height: 100vh;
    padding: 120px 2rem 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.success-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    gap: 3rem;
    align-items: center;
}

.success-content {
    flex: 1;
    max-width: 600px;
}

.success-icon {
    margin-bottom: 1.5rem;
    display: inline-block;
    position: relative;
    opacity: 0;
    transform: scale(0.8);
    transition: all 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.success-icon.animate {
    opacity: 1;
}

@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 0.7;
    }
    70% {
        transform: scale(1.5);
        opacity: 0;
    }
    100% {
        transform: scale(1.5);
        opacity: 0;
    }
}

.success-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent;
}

.success-message {
    font-size: 1.125rem;
    color: var(--gray-600);
    margin-bottom: 2.5rem;
    max-width: 90%;
    line-height: 1.7;
}

.next-steps {
    margin-bottom: 3rem;
}

.next-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 1.5rem;
}

.next-cards {
    display: flex;
    gap: 1.5rem;
}

.next-card {
    flex: 1;
    border-radius: 16px;
    padding: 1.5rem;
}


.next-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(29, 161, 242, 0.1);
    border-radius: 12px;
    margin-bottom: 1rem;
    color: var(--twitter-blue);
}

.next-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 0.75rem;
}

.next-card p {
    font-size: 0.95rem;
    color: var(--gray-600);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.next-button {
    display: inline-block;
    padding: 0.75rem 1.25rem;
    background: var(--gradient-primary);
    color: white;
    border-radius: 8px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.next-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.success-footer {
    margin-top: 2rem;
    text-align: left;
}

.back-home {
    display: inline-flex;
    align-items: center;
    color: var(--gray-600);
    text-decoration: none;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.back-home:before {
    content: '←';
    margin-right: 0.5rem;
}

.back-home:hover {
    color: var(--twitter-blue);
}

.success-visual {
    flex: 1;
    max-width: 500px;
}

.success-image {
    width: 100%;
    height: auto;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(29, 161, 242, 0.2);
    transition: all 0.3s ease;
}

.success-screenshot {
    width: 100%;
    height: auto;
    display: block;
    transition: all 0.5s ease;
}

.success-image:hover .success-screenshot {
    transform: scale(1.02);
}

.success-note {
    margin-top: 1.5rem;
    padding: 1rem;
    background: rgba(29, 161, 242, 0.1);
    border-radius: 8px;
    font-size: 0.9rem;
    color: var(--gray-700);
    text-align: center;
    border: 1px dashed rgba(29, 161, 242, 0.3);
}

/* 响应式样式 */
@media (max-width: 1024px) {
    .success-container {
        flex-direction: column;
        gap: 2rem;
    }
    
    .success-content {
        max-width: 100%;
        text-align: center;
    }
    
    .success-message {
        max-width: 100%;
        margin-left: auto;
        margin-right: auto;
    }
    
    .success-footer {
        text-align: center;
    }
}

@media (max-width: 768px) {
    .next-cards {
        flex-direction: column;
    }
    
    .success-visual {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .success-title {
        font-size: 2rem;
    }
    
    .next-title {
        font-size: 1.25rem;
    }
}

/* Footer样式 */
.footer {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    border-top: 1px solid rgba(29, 161, 242, 0.1);
    padding: 2rem 0 1.5rem;
    margin-top: 4rem;
}

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

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.footer-brand .brand-text {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-800);
}

.copyright {
    font-size: 0.875rem;
    color: var(--gray-500);
    font-weight: 400;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-link {
    font-size: 0.875rem;
    color: var(--gray-600);
    text-decoration: none;
    transition: color 0.2s ease;
    padding: 0.25rem 0;
}

.footer-link:hover {
    color: var(--twitter-blue);
    text-decoration: underline;
}

/* Footer 响应式设计 */
@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 1.5rem;
    }
    
    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .footer {
        padding: 1.5rem 0 1rem;
    }
    
    .footer-container {
        padding: 0 1rem;
    }
    
    .footer-brand .brand-text {
        font-size: 1.125rem;
    }
    
    .copyright {
        font-size: 0.8rem;
    }
}