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

:root {
    --primary-color: #4f46e5;
    --primary-dark: #3730a3;
    --primary-light: #6366f1;
    --secondary-color: #06b6d4;
    --accent-color: #8b5cf6;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-light: #94a3b8;
    --bg-primary: #ffffff;
    --bg-secondary: #f1f5f9;
    --bg-dark: #0f172a;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 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);
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

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

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

/* ==================== 按钮样式 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 14px 0 rgba(79, 70, 229, 0.39);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.23);
}

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

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

.btn-login {
    color: var(--text-secondary);
    padding: 10px 20px;
}

.btn-login:hover {
    color: var(--primary-color);
}

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

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

.btn-white:hover {
    background: var(--bg-secondary);
    transform: translateY(-2px);
}

.btn-outline-white {
    background: transparent;
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.btn-outline-white:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: white;
}

.btn-block {
    width: 100%;
}

/* ==================== 导航栏 ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.6);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo a {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 18px;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-list {
    display: flex;
    gap: 32px;
}

.nav-list a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 15px;
    position: relative;
}

.nav-list a:hover,
.nav-list a.active {
    color: var(--primary-color);
}

.nav-list a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

.nav-list a:hover::after,
.nav-list a.active::after {
    width: 100%;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.mobile-menu-toggle {
    display: none;
    font-size: 24px;
    cursor: pointer;
}

/* ==================== Hero区域 ==================== */
.hero {
    position: relative;
    padding: 140px 0 100px;
    overflow: hidden;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    top: -200px;
    right: -100px;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, var(--secondary-color), #22d3ee);
    bottom: -100px;
    left: -100px;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, var(--accent-color), #a78bfa);
    top: 50%;
    left: 30%;
    opacity: 0.3;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-tag {
    display: inline-block;
    padding: 8px 16px;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.1), rgba(139, 92, 246, 0.1));
    color: var(--primary-color);
    font-size: 14px;
    font-weight: 600;
    border-radius: 100px;
    margin-bottom: 20px;
}

.hero-title {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    color: var(--text-primary);
}

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

.hero-desc {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.8;
    max-width: 500px;
}

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

.hero-stats {
    display: flex;
    gap: 48px;
}

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

.stat-number {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary-color);
}

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

/* Hero可视化 - AI平台轨道 */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.ai-platforms-orbit {
    position: relative;
    width: 450px;
    height: 450px;
}

.center-core {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 140px;
    height: 140px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 20px 40px rgba(79, 70, 229, 0.3);
    z-index: 10;
}

.center-core i {
    font-size: 36px;
    margin-bottom: 8px;
}

.center-core span {
    font-size: 14px;
    font-weight: 600;
}

.orbit-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 380px;
    height: 380px;
    border: 2px dashed rgba(79, 70, 229, 0.2);
    border-radius: 50%;
    animation: rotate 30s linear infinite;
}

@keyframes rotate {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

.platform-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: rotate(var(--angle)) translateX(190px) rotate(calc(-1 * var(--angle)));
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    background: white;
    padding: 8px 12px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    white-space: nowrap;
}

.platform-icon i {
    font-size: 20px;
    color: var(--primary-color);
}

/* ==================== 通用区块标题 ==================== */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-header.light {
    color: white;
}

.section-header.light .section-title {
    color: white;
}

.section-header.light .section-desc {
    color: rgba(255, 255, 255, 0.8);
}

.section-tag {
    display: inline-block;
    padding: 8px 20px;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.1), rgba(139, 92, 246, 0.1));
    color: var(--primary-color);
    font-size: 14px;
    font-weight: 600;
    border-radius: 100px;
    margin-bottom: 16px;
}

.section-title {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.section-desc {
    font-size: 18px;
    color: var(--text-secondary);
}

/* ==================== 市场趋势时间线 ==================== */
.trends {
    padding: 100px 0;
    background: var(--bg-primary);
}

.trends-timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.timeline-line {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color), var(--secondary-color));
    border-radius: 2px;
    transform: translateY(-50%);
}

.timeline-items {
    display: flex;
    justify-content: space-between;
    position: relative;
}

.timeline-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 18%;
    position: relative;
}

.timeline-dot {
    width: 20px;
    height: 20px;
    background: white;
    border: 4px solid var(--primary-color);
    border-radius: 50%;
    margin-bottom: 16px;
    z-index: 1;
}

.timeline-item.active .timeline-dot {
    background: var(--primary-color);
    box-shadow: 0 0 0 8px rgba(79, 70, 229, 0.2);
}

.timeline-year {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.timeline-card {
    background: white;
    padding: 20px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    text-align: center;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.timeline-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.timeline-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.1), rgba(139, 92, 246, 0.1));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
    font-size: 20px;
    color: var(--primary-color);
}

.timeline-card h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.timeline-card p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.timeline-card .highlight {
    color: var(--primary-color);
    font-weight: 600;
}

/* ==================== AI搜索平台 ==================== */
.platforms {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--bg-dark), #1e293b);
    position: relative;
}

.platforms::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.platforms .container {
    position: relative;
    z-index: 1;
}

.platforms-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 60px;
}

.platform-stat-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: var(--transition);
}

.platform-stat-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-4px);
}

.platform-icon-large {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    flex-shrink: 0;
}

.platform-icon-large.doubao { background: linear-gradient(135deg, #3b82f6, #1d4ed8); color: white; }
.platform-icon-large.wenxin { background: linear-gradient(135deg, #8b5cf6, #6d28d9); color: white; }
.platform-icon-large.deepseek { background: linear-gradient(135deg, #06b6d4, #0891b2); color: white; }
.platform-icon-large.yuanbao { background: linear-gradient(135deg, #f59e0b, #d97706); color: white; }
.platform-icon-large.tongyi { background: linear-gradient(135deg, #10b981, #059669); color: white; }
.platform-icon-large.nami { background: linear-gradient(135deg, #ec4899, #db2777); color: white; }
.platform-icon-large.douyin { background: linear-gradient(135deg, #000000, #1f2937); color: white; }
.platform-icon-large.baidu { background: linear-gradient(135deg, #2932e1, #1e40af); color: white; }

.platform-info {
    display: flex;
    flex-direction: column;
}

.platform-name {
    font-size: 16px;
    font-weight: 600;
    color: white;
}

.platform-users {
    font-size: 24px;
    font-weight: 700;
    color: var(--secondary-color);
}

.platform-label {
    font-size: 12px;
    color: var(--text-light);
}

/* 核心数据指标 */
.core-metrics {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 60px;
}

.metric-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    padding: 28px;
    text-align: center;
    transition: var(--transition);
}

.metric-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-4px);
}

.metric-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 24px;
    color: white;
}

.metric-content h4 {
    font-size: 15px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 8px;
}

.metric-value {
    font-size: 32px;
    font-weight: 700;
    color: white;
    margin-bottom: 8px;
}

.metric-desc {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.5;
}

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

.platforms-summary p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 12px;
}

.platforms-summary h3 {
    font-size: 28px;
    font-weight: 700;
    color: white;
    background: linear-gradient(135deg, var(--secondary-color), #22d3ee);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ==================== 产品介绍 ==================== */
.product {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.product-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.product-intro {
    max-width: 500px;
}

.product-desc {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 32px;
}

.product-desc .highlight {
    color: var(--primary-color);
    font-weight: 600;
}

.product-features {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.product-feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 16px;
    color: var(--text-primary);
    font-weight: 500;
}

.product-feature-item i {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 16px;
}

/* 产品可视化图表 */
.product-visual {
    display: flex;
    justify-content: center;
}

.product-diagram {
    position: relative;
    width: 400px;
    height: 400px;
}

.diagram-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 130px;
    height: 130px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 20px 40px rgba(79, 70, 229, 0.3);
    z-index: 10;
}

.diagram-center i {
    font-size: 32px;
    margin-bottom: 6px;
}

.diagram-center span {
    font-size: 13px;
    font-weight: 600;
    text-align: center;
    line-height: 1.3;
}

.diagram-node {
    position: absolute;
    width: 100px;
    height: 100px;
    background: white;
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
}

.diagram-node:hover {
    transform: scale(1.1);
}

.diagram-node i {
    font-size: 28px;
    color: var(--primary-color);
    margin-bottom: 6px;
}

.diagram-node span {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.node-1 { top: 0; left: 50%; transform: translateX(-50%); }
.node-2 { top: 50%; right: 0; transform: translateY(-50%); }
.node-3 { bottom: 0; left: 50%; transform: translateX(-50%); }
.node-4 { top: 50%; left: 0; transform: translateY(-50%); }

.connection-line {
    position: absolute;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    opacity: 0.3;
}

.line-1 { top: 70px; left: 50%; width: 2px; height: 80px; transform: translateX(-50%); }
.line-2 { top: 50%; right: 70px; width: 80px; height: 2px; transform: translateY(-50%); }
.line-3 { bottom: 70px; left: 50%; width: 2px; height: 80px; transform: translateX(-50%); }
.line-4 { top: 50%; left: 70px; width: 80px; height: 2px; transform: translateY(-50%); }

/* ==================== 产品优势 ==================== */
.advantages {
    padding: 100px 0;
    background: var(--bg-primary);
}

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

.advantage-card {
    background: white;
    padding: 32px;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.advantage-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.advantage-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.1), rgba(139, 92, 246, 0.1));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.advantage-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.advantage-desc {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.6;
}

.advantage-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.advantage-list li {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.advantage-list li i {
    color: #10b981;
    font-size: 14px;
}

/* ==================== CTA区域 ==================== */
.cta {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.cta-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    font-size: 40px;
    font-weight: 700;
    color: white;
    margin-bottom: 16px;
}

.cta-desc {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 32px;
}

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

/* ==================== 页脚 ==================== */
.footer {
    padding: 80px 0 0;
    background: var(--bg-dark);
    color: white;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 60px;
}

.footer-brand .logo {
    margin-bottom: 20px;
}

.footer-brand .logo-text {
    background: linear-gradient(135deg, white, var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-desc {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 24px;
}

.footer-social {
    display: flex;
    gap: 16px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
}

.footer-links h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    color: white;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    font-size: 15px;
    color: var(--text-light);
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    padding: 24px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

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

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-text {
        order: 1;
    }

    .hero-visual {
        order: 0;
    }

    .hero-desc {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .ai-platforms-orbit {
        width: 350px;
        height: 350px;
    }

    .orbit-ring {
        width: 300px;
        height: 300px;
    }

    .platform-icon {
        transform: rotate(var(--angle)) translateX(150px) rotate(calc(-1 * var(--angle)));
    }

    .timeline-items {
        flex-direction: column;
        gap: 24px;
    }

    .timeline-line {
        display: none;
    }

    .timeline-item {
        width: 100%;
    }

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

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

    .product-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .product-intro {
        max-width: 100%;
    }

    .product-features {
        align-items: center;
    }

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

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

@media (max-width: 768px) {
    .nav {
        display: none;
    }

    .header-actions {
        display: none;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .hero {
        padding: 120px 0 60px;
        min-height: auto;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }

    .ai-platforms-orbit {
        width: 280px;
        height: 280px;
    }

    .center-core {
        width: 100px;
        height: 100px;
    }

    .center-core i {
        font-size: 24px;
    }

    .orbit-ring {
        width: 240px;
        height: 240px;
    }

    .platform-icon {
        transform: rotate(var(--angle)) translateX(120px) rotate(calc(-1 * var(--angle)));
        font-size: 10px;
        padding: 6px 8px;
    }

    .platform-icon i {
        font-size: 16px;
    }

    .section-title {
        font-size: 28px;
    }

    .platforms-stats {
        grid-template-columns: 1fr;
    }

    .core-metrics {
        grid-template-columns: 1fr;
    }

    .product-diagram {
        width: 300px;
        height: 300px;
    }

    .diagram-center {
        width: 100px;
        height: 100px;
    }

    .diagram-node {
        width: 70px;
        height: 70px;
    }

    .diagram-node i {
        font-size: 20px;
    }

    .diagram-node span {
        font-size: 11px;
    }

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

    .cta-title {
        font-size: 28px;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-social {
        justify-content: center;
    }
}