/\* ===== 基础重置 ===== \*/
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.7;
    color: #374151;
    background: #ffffff;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
}

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

/\* ===== 布局容器 ===== \*/
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/\* ===== 主内容区 ===== \*/
main {
    padding-top: 80px;
}

.section {
    padding: 80px 0;
}

.section-gray {
    background: #f9fafb;
}

.section-header {
    text-align: center;
    margin-bottom: 56px;
}

/\* ===== 标题样式 ===== \*/
.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: #111827;
    margin-bottom: 16px;
    letter-spacing: -0.025em;
    position: relative;
    display: inline-block;
    width: 100%;
}

.section-title::after {
    content: '';
    display: block;
    width: 48px;
    height: 4px;
    background: linear-gradient(135deg, #7c3aed, #8b5cf6);
    margin: 20px auto 0;
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.125rem;
    color: #6b7280;
    max-width: 600px;
    margin: 0 auto;
}

/\* ===== Hero区域 ===== \*/
.hero-banner {
    background: linear-gradient(135deg, #7c3aed, #8b5cf6);
    color: white;
    padding: 120px 24px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-bg-shapes {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.hero-bg-shapes .shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.15;
}

.hero-bg-shapes .shape-1 {
    width: 400px;
    height: 400px;
    background: white;
    top: -150px;
    right: -100px;
}

.hero-bg-shapes .shape-2 {
    width: 300px;
    height: 300px;
    background: white;
    bottom: -100px;
    left: -50px;
}

.hero-bg-shapes .shape-3 {
    width: 200px;
    height: 200px;
    background: white;
    top: 50%;
    left: 20%;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 20px;
    letter-spacing: -0.03em;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 36px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/\* ===== 按钮样式 ===== \*/
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-weight: 600;
    font-size: 1rem;
    border-radius: 12px;
    border: none;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    gap: 8px;
}

.btn-primary {
    background: white;
    color: #7c3aed;
    box-shadow: 0 4px 14px rgba(0,0,0,0.1);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.btn-white {
    background: white;
    color: #7c3aed;
}

.btn-white:hover {
    background: #f9fafb;
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: #7c3aed;
    border: 2px solid #7c3aed;
}

.btn-outline:hover {
    background: #7c3aed;
    color: white;
}

.btn-lg {
    padding: 16px 40px;
    font-size: 1.1rem;
}

.btn-sm {
    padding: 10px 20px;
    font-size: 0.9rem;
}

/\* ===== 特色网格 ===== \*/
.feature-section {
    padding: 80px 0;
    background: white;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.feature-item {
    text-align: center;
    padding: 40px 24px;
    border-radius: 20px;
    background: #f9fafb;
    transition: all 0.35s ease;
}

.feature-item:hover {
    transform: translateY(-6px);
    background: white;
    box-shadow: 0 20px 40px rgba(0,0,0,0.08);
}

.feature-icon {
    width: 72px;
    height: 72px;
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    color: white;
}

.feature-icon svg {
    width: 32px;
    height: 32px;
}

.icon-gradient-blue {
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
}

.icon-gradient-purple {
    background: linear-gradient(135deg, #8b5cf6, #6d28d9);
}

.icon-gradient-green {
    background: linear-gradient(135deg, #10b981, #059669);
}

.icon-gradient-orange {
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

.icon-gradient-gold {
    background: linear-gradient(135deg, #eab308, #ca8a04);
}

.feature-name {
    font-size: 1.125rem;
    font-weight: 600;
    color: #111827;
    margin-bottom: 12px;
}

.feature-text {
    font-size: 0.95rem;
    color: #6b7280;
    line-height: 1.7;
}

/\* ===== 卡片网格 ===== \*/
.card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.card {
    background: white;
    padding: 36px 32px;
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.04);
    border: 1px solid rgba(0,0,0,0.04);
    transition: all 0.35s ease;
    text-align: center;
}

.card-hover:hover {
    transform: translateY(-8px);
    box-shadow: 0 24px 48px rgba(0,0,0,0.1);
    border-color: #7c3aed22;
}

.card-icon-wrapper {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    color: white;
}

.card-icon-wrapper svg {
    width: 28px;
    height: 28px;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: #111827;
    margin-bottom: 16px;
}

.card-text {
    color: #6b7280;
    line-height: 1.8;
    font-size: 0.95rem;
}

/\* ===== 关键词卡片网格 ===== \*/
.keyword-card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.keyword-card {
    background: white;
    padding: 32px;
    border-radius: 16px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.04);
    border: 1px solid rgba(0,0,0,0.04);
    transition: all 0.3s ease;
    text-align: center;
}

.keyword-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0,0,0,0.08);
}

.keyword-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: #111827;
    margin-bottom: 12px;
}

.keyword-desc {
    font-size: 0.9rem;
    color: #6b7280;
    margin-bottom: 20px;
    line-height: 1.6;
}

/\* ===== 统计网格 ===== \*/
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 48px;
    max-width: 800px;
    margin: 0 auto;
}

.stat-item {
    text-align: center;
    padding: 40px;
    background: linear-gradient(135deg, #7c3aed, #8b5cf6);
    border-radius: 20px;
    color: white;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.stat-label {
    font-size: 1rem;
    opacity: 0.9;
}

/\* ===== 联系网格 ===== \*/
.contact-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.contact-item {
    text-align: center;
    padding: 40px 24px;
    background: white;
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.04);
    transition: all 0.3s ease;
}

.contact-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0,0,0,0.08);
}

.contact-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: linear-gradient(135deg, #7c3aed, #8b5cf6);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: white;
}

.contact-icon svg {
    width: 28px;
    height: 28px;
}

.contact-label {
    font-size: 0.875rem;
    color: #6b7280;
    margin-bottom: 8px;
}

.contact-value {
    font-size: 1rem;
    font-weight: 600;
    color: #111827;
}

/\* ===== 步骤网格 ===== \*/
.steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    position: relative;
}

.steps-grid::before {
    content: '';
    position: absolute;
    top: 32px;
    left: 10%;
    right: 10%;
    height: 3px;
    background: linear-gradient(90deg, #7c3aed, #8b5cf6);
    z-index: 0;
}

.step-item {
    text-align: center;
    position: relative;
    z-index: 1;
}

.step-number {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, #7c3aed, #8b5cf6);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 24px;
    box-shadow: 0 8px 24px #7c3aed44;
}

.step-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: #111827;
    margin-bottom: 8px;
}

.step-text {
    font-size: 0.9rem;
    color: #6b7280;
    line-height: 1.6;
}

/\* ===== CTA区域 ===== \*/
.cta-section {
    background: linear-gradient(135deg, #7c3aed, #8b5cf6);
    color: white;
    padding: 80px 24px;
    text-align: center;
}

.cta-content {
    max-width: 700px;
    margin: 0 auto;
}

.cta-title {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.cta-text {
    font-size: 1.125rem;
    opacity: 0.9;
    margin-bottom: 36px;
}

/\* ===== Footer样式 ===== \*/
.site-footer {
    background: linear-gradient(135deg, #7c3aed, #8b5cf6);
    color: white;
    padding: 64px 24px 32px;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 48px;
}

.footer-section h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-section p {
    margin: 10px 0;
    opacity: 0.85;
    font-size: 0.95rem;
    line-height: 1.7;
}

.footer-section a {
    color: white;
    opacity: 0.85;
}

.footer-section a:hover {
    opacity: 1;
}

.footer-bottom {
    text-align: center;
    padding-top: 32px;
    margin-top: 48px;
    border-top: 1px solid rgba(255,255,255,0.2);
    font-size: 0.875rem;
    opacity: 0.75;
}

/\* ===== taocarts页面样式 ===== \*/
.taocarts-hero {
    background: linear-gradient(135deg, #7c3aed, #8b5cf6);
    color: white;
    padding: 100px 24px;
    text-align: center;
}

.taocarts-hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.taocarts-intro, .taocarts-features, .taocarts-target, .taocarts-cta {
    padding: 80px 0;
}

.taocarts-intro {
    background: white;
}

.taocarts-features {
    background: #f9fafb;
}

.taocarts-target {
    background: white;
}

.taocarts-cta {
    background: linear-gradient(135deg, #7c3aed, #8b5cf6);
    color: white;
}

.target-list {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: center;
    margin-top: 32px;
}

.target-item {
    background: linear-gradient(135deg, #7c3aed, #8b5cf6);
    color: white;
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 500;
}

.contact-info {
    text-align: center;
    margin-top: 48px;
    background: white;
    padding: 56px 64px;
    border-radius: 24px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.06);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.contact-info p {
    margin: 16px 0;
    font-size: 1.1rem;
    color: #374151;
    text-align: center;
}

/\* ===== 关键词详情页面样式 ===== \*/
.keyword-content {
    background: white;
    padding: 56px 64px;
    border-radius: 24px;
    box-shadow: 0 8px 40px rgba(0,0,0,0.06);
    margin: 48px auto;
    max-width: 900px;
}

.keyword-content p {
    font-size: 1.05rem;
    line-height: 2;
    color: #4b5563;
    margin-bottom: 24px;
}

.keyword-content p:last-child {
    margin-bottom: 0;
}

.keyword-section {
    padding: 80px 0;
}

.keyword-section .container {
    max-width: 1000px;
}

.keyword-header {
    text-align: center;
    margin-bottom: 56px;
}

.keyword-header h2 {
    font-size: 2rem;
    color: #111827;
    margin-bottom: 16px;
    position: relative;
    display: inline-block;
}

.keyword-header h2::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 56px;
    height: 4px;
    background: linear-gradient(90deg, #7c3aed, #8b5cf6);
    border-radius: 2px;
}

.keyword-header p {
    font-size: 1.1rem;
    color: #6b7280;
    margin-top: 20px;
}

.keyword-feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-top: 56px;
}

.keyword-feature-item {
    background: white;
    padding: 40px 28px;
    border-radius: 20px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.04);
    text-align: center;
    transition: all 0.35s ease;
    border: 1px solid rgba(0,0,0,0.04);
}

.keyword-feature-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 48px rgba(0,0,0,0.1);
    border-color: #7c3aed33;
}

.keyword-feature-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
    display: block;
}

.keyword-feature-title {
    font-size: 1.125rem;
    color: #111827;
    margin-bottom: 12px;
    font-weight: 600;
}

.keyword-feature-text {
    color: #6b7280;
    font-size: 0.95rem;
    line-height: 1.7;
}

.keyword-cta {
    background: linear-gradient(135deg, #7c3aed, #8b5cf6);
    color: white;
    padding: 56px 48px;
    text-align: center;
    border-radius: 24px;
    margin-top: 56px;
    box-shadow: 0 12px 40px #7c3aed33;
}

.keyword-cta h3 {
    font-size: 1.75rem;
    margin-bottom: 16px;
    font-weight: 700;
}

.keyword-cta p {
    font-size: 1.1rem;
    opacity: 0.92;
    margin-bottom: 32px;
}

/\* ===== 响应式设计 ===== \*/
@media (max-width: 1024px) {
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

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

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

    .steps-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }

    .steps-grid::before {
        display: none;
    }
}

@media (max-width: 768px) {
    main {
        padding-top: 70px;
    }

    .hero-banner {
        padding: 80px 20px;
    }

    .hero-title {
        font-size: 2.25rem;
    }

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

    .section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .section-subtitle {
        font-size: 1rem;
    }

    .feature-grid,
    .card-grid,
    .keyword-card-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .stat-item {
        padding: 32px;
    }

    .stat-number {
        font-size: 2rem;
    }

    .steps-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-container {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .keyword-content {
        padding: 36px 24px;
        margin: 24px 16px;
    }

    .keyword-feature-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .keyword-cta {
        padding: 40px 24px;
    }

    .cta-title {
        font-size: 1.75rem;
    }

    .btn-lg {
        padding: 14px 32px;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-title {
        font-size: 1.875rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .feature-item {
        padding: 32px 20px;
    }

    .card {
        padding: 28px 24px;
    }
}