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

:root {
    /* 蓝色主题配色方案 */
    --primary-blue: #3b82f6;
    --secondary-blue: #1d4ed8;
    --light-blue: #60a5fa;
    --lighter-blue: #93c5fd;
    --lightest-blue: #dbeafe;
    --dark-blue: #1e40af;
    --darker-blue: #1e3a8a;
    --accent-blue: #2563eb;
    --sky-blue: #0ea5e9;
    --indigo-blue: #6366f1;
    --white: #ffffff;
    --off-white: #f8fafc;
    --light-gray: #f1f5f9;
    --medium-gray: #e2e8f0;
    --dark-gray: #64748b;
    --darker-gray: #334155;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --text-light: #ffffff;
    --blue-50: #eff6ff;
    --blue-100: #dbeafe;
    --blue-900: #1e3a8a;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.navbar {
    
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-blue);
}

.nav-logo img {
    width: 40px;
    height: 40px;
}

.logo-image {
    width: 40px;
    height: 40px;
    object-fit: contain;
    border-radius: 8px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--dark-gray);
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-blue);
    transition: width 0.3s ease;
}

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

.trial-btn {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-blue) 100%);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
}

.trial-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.6);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--dark-gray);
    transition: all 0.3s ease;
}

/* 英雄区域 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 50%, var(--darker-blue) 100%);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.1;
}

.hero-animation {
    position: absolute;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><pattern id="grid" width="50" height="50" patternUnits="userSpaceOnUse"><path d="M 50 0 L 0 0 0 50" fill="none" stroke="white" stroke-width="1" opacity="0.3"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(1deg); }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.highlight {
    background: linear-gradient(45deg, var(--light-blue), var(--lighter-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 3rem;
    opacity: 0.9;
}

.hero-features {
    margin: 3rem 0;
}

.feature-list {
    text-align: left;
    max-width: 800px;
    margin: 0 auto;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 1.5rem;
    padding: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    transition: transform 0.3s ease;
}

.feature-item:hover {
    transform: translateX(10px);
}

.feature-item i {
    color: var(--light-blue);
    font-size: 1.5rem;
    margin-top: 2px;
}

.hero-actions {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-top: 3rem;
}

.btn {
    padding: 15px 30px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1.1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-blue) 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.6);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: var(--primary-blue);
}

/* 统计数据 */
.stats {
    padding: 80px 0;
    background: var(--blue-50);
    margin-top: 60px;
    position: relative;
    z-index: 3;
    border-radius: 20px 20px 0 0;
    border-top: 3px solid var(--primary-blue);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 30px;
    background: linear-gradient(135deg, var(--white) 0%, var(--blue-100) 100%);
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.1);
    transition: transform 0.3s ease;
    border: 1px solid var(--lightest-blue);
}

.stat-item:hover {
    transform: translateY(-5px);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-blue) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

.stat-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.stat-content p {
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-blue);
}

/* 搜索变革 */
.revolution {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--secondary-blue) 0%, var(--darker-blue) 100%);
    color: white;
}

/* 搜索引擎演进展示 */
.search-evolution {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.search-category {
    text-align: center;
}

.search-category h4 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 30px;
    color: var(--lighter-blue);
    position: relative;
}

.search-category h4::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--light-blue) 0%, var(--lighter-blue) 100%);
    border-radius: 2px;
    box-shadow: 0 2px 8px rgba(96, 165, 250, 0.4);
}

.search-banner {
    background: rgba(255, 255, 255, 0.12);
    border-radius: 18px;
    padding: 0;
    backdrop-filter: blur(15px);
    border: 2px solid rgba(255, 255, 255, 0.25);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    min-height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(59, 130, 246, 0.15);
}

.search-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
    border-radius: 16px;
    pointer-events: none;
}

.search-banner:hover {
    transform: translateY(-8px) scale(1.02);
    background: rgba(255, 255, 255, 0.18);
    border-color: rgba(255, 255, 255, 0.4);
    box-shadow: 0 20px 60px rgba(59, 130, 246, 0.25), 0 0 0 1px rgba(255, 255, 255, 0.1);
}

.banner-image {
    position: absolute;
    top: 8px;
    left: 8px;
    right: 8px;
    bottom: 8px;
    width: calc(100% - 16px);
    height: calc(100% - 16px);
    object-fit: contain;
    border-radius: 12px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 2;
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.1));
}

.banner-image:hover {
    transform: scale(1.05);
}

/* AI大模型云展示 */
.ai-models-cloud {
    position: absolute;
    top: 0;
    right: 5%;
    width: 40%;
    height: 100%;
    pointer-events: auto;
    z-index: 1;
}

.ai-model-item {
    position: absolute;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 12px;
    border: 1px solid rgba(255, 255, 255, 0.8);
    transition: all 0.3s ease;
    box-shadow: 0 8px 32px rgba(59, 130, 246, 0.15);
}

.ai-model-item:hover {
    background: rgba(255, 255, 255, 0.95);
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 12px 40px rgba(59, 130, 246, 0.25);
}

.ai-model-logo {
    width: 60px;
    height: 60px;
    object-fit: contain;
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.ai-model-logo:hover {
    transform: scale(1.1);
}

/* 云形分布定位 */
.model-1 {
    top: 15%;
    right: 15%;
    animation: float1 6s ease-in-out infinite;
}

.model-2 {
    top: 35%;
    right: 35%;
    animation: float2 8s ease-in-out infinite;
}

.model-3 {
    top: 25%;
    right: 5%;
    animation: float3 7s ease-in-out infinite;
}

.model-4 {
    top: 55%;
    right: 20%;
    animation: float4 9s ease-in-out infinite;
}

.model-5 {
    top: 45%;
    right: 45%;
    animation: float5 5s ease-in-out infinite;
}

/* 浮动动画 */
@keyframes float1 {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    25% { transform: translateY(-15px) rotate(1deg); }
    50% { transform: translateY(-10px) rotate(-1deg); }
    75% { transform: translateY(-20px) rotate(1deg); }
}

@keyframes float2 {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    33% { transform: translateY(-20px) rotate(-1deg); }
    66% { transform: translateY(-15px) rotate(1deg); }
}

@keyframes float3 {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    40% { transform: translateY(-18px) rotate(1deg); }
    80% { transform: translateY(-12px) rotate(-1deg); }
}

@keyframes float4 {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    30% { transform: translateY(-22px) rotate(-1deg); }
    60% { transform: translateY(-8px) rotate(1deg); }
    90% { transform: translateY(-16px) rotate(-1deg); }
}

@keyframes float5 {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-25px) rotate(1deg); }
}

/* 移动端AI大模型展示区域 */
.mobile-ai-section {
    display: none; /* 默认隐藏，只在移动端显示 */
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    padding: 50px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.mobile-ai-models {
    text-align: center;
}

.mobile-ai-title {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1rem;
    margin-bottom: 20px;
    font-weight: 500;
}

.mobile-ai-scroll {
    display: flex;
    gap: 20px;
    overflow-x: auto;
    padding: 10px 0;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.mobile-ai-scroll::-webkit-scrollbar {
    display: none;
}

.mobile-ai-item {
    flex: 0 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    padding: 15px 12px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
    min-width: 80px;
}

.mobile-ai-item:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

.mobile-ai-logo {
    width: 40px;
    height: 40px;
    object-fit: contain;
    border-radius: 6px;
}

.mobile-ai-item span {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.8rem;
    font-weight: 500;
    white-space: nowrap;
}

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

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.section-header h3 {
    font-size: 1.3rem;
    opacity: 0.9;
    font-weight: 400;
}

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

/* 核心功能 */
.core-features {
    padding: 100px 0;
    background: var(--blue-50);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
}

.feature-card {
    padding: 40px;
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(59, 130, 246, 0.15);
    position: relative;
    transition: all 0.3s ease;
    border: 1px solid var(--lightest-blue);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(59, 130, 246, 0.25);
}

.feature-number {
    position: absolute;
    top: -20px;
    left: 40px;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-blue) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.feature-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.feature-content p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.7;
}

.feature-link {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.feature-link:hover {
    color: var(--dark-blue);
}

/* 五大优势 */
.advantages {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--blue-100) 0%, var(--lightest-blue) 100%);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.advantage-card {
    background: white;
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease;
}

.advantage-card:hover {
    transform: translateY(-5px);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-blue) 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.advantage-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-primary);
}

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

/* 媒体平台 */
.media-platforms {
    padding: 100px 0;
    background: var(--blue-50);
}

.platforms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.platform-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    padding: 30px 20px;
    background: linear-gradient(135deg, var(--white) 0%, var(--blue-100) 100%);
    border-radius: 16px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: 1px solid var(--lightest-blue);
}

.platform-item:hover {
    transform: translateY(-5px);
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-blue) 100%);
    color: white;
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
}

.platform-logo {
    width: 60px;
    height: 60px;
    object-fit: contain;
    transition: all 0.3s ease;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    padding: 8px;
    box-sizing: border-box;
}

.platform-item:hover .platform-logo {
    transform: scale(1.1);
    background: rgba(255, 255, 255, 0.9);
    filter: brightness(1.1) drop-shadow(0 4px 12px rgba(255, 255, 255, 0.5));
}

.platform-item span {
    font-weight: 600;
    color: var(--text-primary);
    transition: color 0.3s ease;
}

.platform-item:hover span {
    color: white;
}

/* 合作方式 */
.cooperation {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--secondary-blue) 0%, var(--darker-blue) 100%);
    color: white;
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
}

.cooperation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.cooperation-card {
    padding: 40px 30px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    text-align: center;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: transform 0.3s ease;
}

.cooperation-card:hover {
    transform: translateY(-5px);
}

.cooperation-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--light-blue) 0%, var(--lighter-blue) 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    box-shadow: 0 4px 15px rgba(96, 165, 250, 0.4);
}

.cooperation-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.cooperation-card p {
    opacity: 0.9;
    line-height: 1.6;
}

/* CTA区域 */
.cta {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--darker-blue) 100%);
    color: white;
}

.cta-content h6 {
    font-size: 1.1rem;
    margin-bottom: 20px;
    opacity: 0.9;
}

.cta-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.3;
}

.cta-content p {
    font-size: 1.2rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

.cta-actions {
    display: flex;
    gap: 20px;
    justify-content: center;
}

/* AI推荐示例区域 */
.ai-recommendation-demo {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.demo-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.demo-content p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* AI大模型图标行 */
.ai-models-row {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
    margin-bottom: 4rem;
    flex-wrap: wrap;
}

.ai-model-icon {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.model-icon {
    width: 50px;
    height: 50px;
    object-fit: contain;
    border-radius: 12px;
    background: white;
    padding: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.model-icon:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.ai-model-icon span {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* 示例对话区域 */
.demo-conversations {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    position: relative;
}

.conversation-item {
    background: white;
    border-radius: 16px;
    padding: 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border: 1px solid #e2e8f0;
}

.conversation-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

.conversation-item.highlighted {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: white;
    border: none;
}

.conversation-label {
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 500;
    text-align: left;
}

.conversation-item.highlighted .conversation-label {
    color: white;
}

.conversation-text {
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 500;
    text-align: left;
}

.conversation-item.highlighted .conversation-text {
    color: white;
}

.conversation-icon {
    display: inline-block;
    margin-right: 10px;
    font-size: 1.2rem;
    color: white;
}

.conversation-tag {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
    float: right;
    margin-top: -5px;
}

/* 页脚 */
.footer {
    background: var(--blue-900);
    color: white;
    padding: 40px 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-info p {
    opacity: 0.8;
}

.footer-contact {
    display: flex;
    gap: 30px;
}

.contact-item span {
    opacity: 0.8;
}

/* 浮动按钮 */
.floating-buttons {
    position: fixed;
    right: 20px;
    bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 1000;
}

.floating-btn {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-blue) 100%);
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.floating-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.6);
}

.wechat-btn {
    background: linear-gradient(135deg, var(--sky-blue) 0%, var(--primary-blue) 100%);
}

.deployment-btn {
    background: linear-gradient(135deg, var(--secondary-blue) 0%, var(--darker-blue) 100%);
    box-shadow: 0 4px 15px rgba(29, 78, 216, 0.4);
}

.deployment-btn:hover {
    box-shadow: 0 8px 25px rgba(29, 78, 216, 0.6);
}

/* 申请免费使用按钮 */
.apply-trial-section {
    position: fixed;
    left: 20px;
    bottom: 20px;
    z-index: 1000;
}

.apply-trial-btn {
    background: linear-gradient(135deg, var(--light-blue) 0%, var(--primary-blue) 100%);
    color: white;
    border: none;
    padding: 15px 25px;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 600;
    font-size: 1.1rem;
    box-shadow: 0 4px 15px rgba(96, 165, 250, 0.4);
    transition: all 0.3s ease;
}

.apply-trial-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(96, 165, 250, 0.6);
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    z-index: 1001;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 0;
    border-radius: 16px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from { transform: translateY(-50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 30px;
    border-bottom: 1px solid #f3f4f6;
}

.modal-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.close {
    color: var(--text-muted);
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s ease;
}

.close:hover {
    color: var(--dark-gray);
}

.modal-body {
    padding: 30px;
}

.trial-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.trial-form input,
.trial-form textarea {
    padding: 12px 16px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.trial-form input:focus,
.trial-form textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
}

/* 侧边栏联系方式 */
.sidebar-contact {
    position: fixed;
    right: -300px;
    top: 50%;
    transform: translateY(-50%);
    width: 300px;
    background: white;
    box-shadow: -5px 0 20px rgba(0, 0, 0, 0.1);
    border-radius: 16px 0 0 16px;
    padding: 20px;
    z-index: 999;
    transition: right 0.3s ease;
}

.sidebar-contact:hover {
    right: 0;
}

.sidebar-contact::before {
    content: '联系我们';
    position: absolute;
    left: -40px;
    top: 50%;
    transform: translateY(-50%) rotate(-90deg);
    background: var(--accent-blue);
    color: white;
    padding: 10px 15px;
    border-radius: 8px 8px 0 0;
    font-weight: 600;
    cursor: pointer;
}

.contact-options {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 20px;
}

.contact-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 15px;
    background: var(--blue-50);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.contact-option:hover {
    background: var(--accent-blue);
    color: white;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
}

.contact-option i {
    font-size: 1.2rem;
    color: var(--accent-blue);
    transition: color 0.3s ease;
}

.contact-option:hover i {
    color: white;
}

.qr-code {
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        display: none;
    }
    
    /* 移动端英雄区域调整 */
    .hero {
        padding: 100px 0 10px 0; /* 增加顶部内边距，确保不被固定导航栏遮挡 */
        min-height: auto; /* 移除100vh限制 */
    }
    
    .hero-content {
        padding: 0 20px; /* 左右内边距避免被遮挡 */
        max-width: 100%; /* 确保内容不超出屏幕宽度 */
        box-sizing: border-box; /* 包含内边距在宽度计算中 */
    }
    
    .hero-title {
        font-size: 2.5rem;
        margin-bottom: 1rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
        margin-bottom: 2rem;
    }
    
    .hero-features {
        margin: 2rem 0;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
        gap: 15px;
        padding: 0 20px; /* 确保按钮不被左右边缘裁切 */
        width: 100%;
        box-sizing: border-box;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .platforms-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
    
    .cooperation-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .cooperation-card {
        padding: 30px 20px;
    }
    
    .cooperation-card h3 {
        font-size: 1.3rem;
    }
    
    .cooperation-icon {
        width: 70px;
        height: 70px;
        font-size: 1.8rem;
    }
    
    .search-evolution {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .search-category h4 {
        font-size: 1.3rem;
    }
    
    .search-banner {
        padding: 0;
        min-height: 220px;
        border-radius: 16px;
        box-shadow: 0 6px 24px rgba(59, 130, 246, 0.12);
    }
    
    .search-banner:hover {
        transform: translateY(-6px) scale(1.01);
    }
    
    .banner-image {
        position: absolute;
        top: 6px;
        left: 6px;
        right: 6px;
        bottom: 6px;
        width: calc(100% - 12px);
        height: calc(100% - 12px);
        border-radius: 10px;
    }
    
    /* AI大模型云展示响应式 */
    .ai-models-cloud {
        display: none; /* 在移动端隐藏，避免遮挡内容 */
    }
    
    /* 显示移动端AI大模型展示区域 */
    .mobile-ai-section {
        display: block;
    }
    
    
    .cta-actions {
        flex-direction: column;
        align-items: center;
    }
    
    /* AI推荐示例区域移动端 */
    .ai-recommendation-demo {
        padding: 60px 0;
    }
    
    .demo-content h2 {
        font-size: 2rem;
    }
    
    .demo-content p {
        font-size: 1.1rem;
        margin-bottom: 2rem;
    }
    
    .ai-models-row {
        gap: 20px;
        margin-bottom: 3rem;
    }
    
    .model-icon {
        width: 40px;
        height: 40px;
    }
    
    .ai-model-icon span {
        font-size: 0.8rem;
    }
    
    .demo-conversations {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .conversation-item {
        padding: 15px;
    }
    
    /* SEO对比区域移动端 */
    .seo-comparison {
        padding: 60px 0;
    }
    
    .seo-comparison .section-header h2 {
        font-size: 2rem;
    }
    
    .comparison-wrapper {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .vs-separator {
        order: 1;
        margin: 20px 0;
    }
    
    .traditional-card {
        order: 0;
    }
    
    .geo-card {
        order: 2;
    }
    
    .vs-circle {
        width: 60px;
        height: 60px;
        font-size: 1.4rem;
    }
    
    .card-header {
        padding: 25px 25px 15px;
    }
    
    .header-icon {
        width: 60px;
        height: 60px;
        font-size: 1.8rem;
    }
    
    .card-header h3 {
        font-size: 1.5rem;
    }
    
    .card-body {
        padding: 0 25px 25px;
    }
    
    .feature-section {
        padding: 15px;
        margin-bottom: 20px;
    }
    
    .feature-section h4 {
        font-size: 1.1rem;
    }
    
    .feature-section p {
        font-size: 0.9rem;
    }
    
    .ai-logo {
        width: 28px;
        height: 28px;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-contact {
        flex-direction: column;
        gap: 15px;
    }
    
    .floating-buttons {
        right: 10px;
        bottom: 10px;
    }
    
    .floating-btn {
        padding: 10px 15px;
        font-size: 0.9rem;
    }
    
    .apply-trial-section {
        left: 10px;
        bottom: 10px;
    }
    
    .apply-trial-btn {
        padding: 12px 20px;
        font-size: 1rem;
    }
    
    .sidebar-contact {
        display: none;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .cta-content h2 {
        font-size: 2rem;
    }
}

/* 平板设备响应式 */
@media (max-width: 1024px) and (min-width: 769px) {
    .search-evolution {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
    
    .search-category:last-child {
        grid-column: 1 / -1;
        max-width: 400px;
        margin: 0 auto;
    }
    
    /* AI大模型云展示平板适配 */
    .ai-models-cloud {
        width: 35%;
        right: 3%;
    }
    
    .ai-model-logo {
        width: 50px;
        height: 50px;
    }
    
    .ai-model-item {
        padding: 10px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    /* 小屏幕英雄区域进一步优化 */
    .hero {
        padding: 90px 0 50px 0; /* 保持足够的顶部空间避免导航栏遮挡 */
    }
    
    .hero-content {
        padding: 0 15px; /* 更紧凑的左右内边距 */
        max-width: 100%; /* 确保内容不超出屏幕宽度 */
        box-sizing: border-box; /* 包含内边距在宽度计算中 */
    }
    
    .hero-title {
        font-size: 2rem;
        margin-bottom: 0.8rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
        margin-bottom: 1.5rem;
    }
    
    .hero-features {
        margin: 1.5rem 0;
    }
    
    .hero-actions {
        gap: 12px;
        padding: 0 15px; /* 确保按钮不被左右边缘裁切 */
        width: 100%;
        box-sizing: border-box;
    }
    
    
    .feature-item {
        flex-direction: column;
        text-align: center;
    }
    
    .platforms-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .floating-btn span {
        display: none;
    }
    
    .section-header h2 {
        font-size: 1.8rem;
    }
    
    .cooperation {
        padding: 60px 0;
    }
    
    .cooperation-card {
        padding: 25px 15px;
        margin-bottom: 20px;
    }
    
    .cooperation-card h3 {
        font-size: 1.2rem;
    }
    
    .cooperation-card p {
        font-size: 0.9rem;
        line-height: 1.5;
    }
    
    .cooperation-icon {
        width: 60px;
        height: 60px;
        font-size: 1.6rem;
        margin-bottom: 15px;
    }
    
    .search-category h4 {
        font-size: 1.2rem;
        margin-bottom: 20px;
    }
    
    .search-banner {
        padding: 0;
        min-height: 180px;
        border-radius: 14px;
        box-shadow: 0 4px 16px rgba(59, 130, 246, 0.1);
    }
    
    .search-banner:hover {
        transform: translateY(-4px) scale(1.01);
    }
    
    .banner-image {
        position: absolute;
        top: 5px;
        left: 5px;
        right: 5px;
        bottom: 5px;
        width: calc(100% - 10px);
        height: calc(100% - 10px);
        border-radius: 8px;
    filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.08));
}

/* SEO对比区域 - 重新设计 */
.seo-comparison {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    position: relative;
}

.seo-comparison .section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.seo-comparison .section-header p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 4rem;
}

.highlight-text {
    color: #ef4444;
    font-weight: 600;
}

/* 新的对比布局容器 */
.comparison-wrapper {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 40px;
    max-width: 1400px;
    margin: 0 auto;
    align-items: start;
}

/* 卡片样式 */
.comparison-card {
    background: white;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.comparison-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
}

/* 传统SEO卡片 */
.traditional-card {
    border: 3px solid #3b82f6;
}

.traditional-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: linear-gradient(90deg, #3b82f6, #1d4ed8);
}

/* GEO卡片 */
.geo-card {
    border: 3px solid #ef4444;
}

.geo-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: linear-gradient(90deg, #ef4444, #dc2626);
}

/* 卡片头部 */
.card-header {
    padding: 30px 30px 20px;
    text-align: center;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(248, 250, 252, 0.9) 100%);
}

.header-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.2rem;
    color: white;
    position: relative;
}

.traditional-icon {
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
}

.geo-icon {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    box-shadow: 0 8px 25px rgba(239, 68, 68, 0.3);
}

.card-header h3 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
}

/* 平台标识 */
.platform-badges {
    display: flex;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}

.platform-badge {
    background: rgba(59, 130, 246, 0.1);
    color: #3b82f6;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.ai-platforms {
    display: flex;
    justify-content: center;
    gap: 10px;
    align-items: center;
}

.ai-logo {
    width: 32px;
    height: 32px;
    object-fit: contain;
    border-radius: 8px;
    background: white;
    padding: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.ai-logo:hover {
    transform: scale(1.1);
}

/* 卡片内容 */
.card-body {
    padding: 0 30px 30px;
}

.feature-section {
    margin-bottom: 25px;
    padding: 20px;
    background: rgba(248, 250, 252, 0.5);
    border-radius: 16px;
    border-left: 4px solid transparent;
    transition: all 0.3s ease;
}

.traditional-card .feature-section {
    border-left-color: #3b82f6;
}

.geo-card .feature-section {
    border-left-color: #ef4444;
}

.feature-section:hover {
    background: rgba(248, 250, 252, 0.8);
    transform: translateX(5px);
}

.feature-section h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.feature-section h4 i {
    font-size: 1rem;
    color: #6b7280;
}

.feature-section p {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin: 0;
}

/* VS分隔符 - 重新设计 */
.vs-separator {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.vs-circle {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.8rem;
    font-weight: 700;
    box-shadow: 0 8px 25px rgba(239, 68, 68, 0.4);
    position: relative;
    animation: vsRotate 4s linear infinite;
}

.vs-circle::before {
    content: '';
    position: absolute;
    top: -4px;
    left: -4px;
    right: -4px;
    bottom: -4px;
    background: linear-gradient(45deg, #ef4444, #3b82f6, #ef4444);
    border-radius: 50%;
    z-index: -1;
    animation: borderRotate 3s linear infinite;
}

@keyframes vsRotate {
    from { transform: rotate(0deg) scale(1); }
    50% { transform: rotate(180deg) scale(1.1); }
    to { transform: rotate(360deg) scale(1); }
}

@keyframes borderRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}
    
    /* AI大模型云展示小屏幕优化 */
    .ai-models-cloud {
        display: none; /* 小屏幕完全隐藏，确保不影响主要内容 */
    }
    
    /* 显示移动端AI大模型展示区域 */
    .mobile-ai-section {
        display: block;
        padding: 40px 0;
    }
    
    .mobile-ai-scroll {
        gap: 15px;
        justify-content: center;
    }
    
    .mobile-ai-item {
        min-width: 70px;
        padding: 12px 10px;
    }
    
    .mobile-ai-logo {
        width: 36px;
        height: 36px;
    }
    
    .mobile-ai-item span {
        font-size: 0.75rem;
    }
    
    /* AI推荐示例区域小屏幕优化 */
    .ai-recommendation-demo {
        padding: 50px 0;
    }
    
    .demo-content h2 {
        font-size: 1.8rem;
        line-height: 1.3;
    }
    
    .demo-content p {
        font-size: 1rem;
        margin-bottom: 1.5rem;
    }
    
    .ai-models-row {
        gap: 15px;
        margin-bottom: 2.5rem;
    }
    
    .model-icon {
        width: 35px;
        height: 35px;
        padding: 6px;
    }
    
    .ai-model-icon span {
        font-size: 0.75rem;
    }
    
    .conversation-item {
        padding: 12px;
    }
    
    .conversation-text {
        font-size: 0.9rem;
    }
    
    /* SEO对比区域小屏幕优化 */
    .seo-comparison {
        padding: 50px 0;
    }
    
    .seo-comparison .section-header h2 {
        font-size: 1.8rem;
        line-height: 1.3;
    }
    
    .seo-comparison .section-header p {
        font-size: 1rem;
        margin-bottom: 3rem;
    }
    
    .comparison-card {
        border-radius: 20px;
    }
    
    .card-header {
        padding: 20px 20px 15px;
    }
    
    .header-icon {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
        margin-bottom: 15px;
    }
    
    .card-header h3 {
        font-size: 1.3rem;
        margin-bottom: 15px;
    }
    
    .platform-badges {
        gap: 6px;
    }
    
    .platform-badge {
        padding: 4px 8px;
        font-size: 0.75rem;
    }
    
    .ai-logo {
        width: 24px;
        height: 24px;
    }
    
    .card-body {
        padding: 0 20px 20px;
    }
    
    .feature-section {
        padding: 12px;
        margin-bottom: 15px;
    }
    
    .feature-section h4 {
        font-size: 1rem;
    }
    
    .feature-section p {
        font-size: 0.85rem;
        line-height: 1.5;
    }
    
    .vs-circle {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
    
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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


/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--blue-50);
}

::-webkit-scrollbar-thumb {
    background: var(--accent-blue);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-blue);
}