* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #165DFF;
    --primary-dark: #0E42B3;
    --primary-light: #E8F3FF;
    --secondary: #36CFC9;
    --text-primary: #1D2129;
    --text-secondary: #4E5969;
    --text-tertiary: #86909C;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F7F8FA;
    --bg-tertiary: #F2F3F5;
    --border: #E5E6EB;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --radius: 8px;
    --radius-lg: 12px;
    --transition: all 0.3s ease;
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text-primary);
    background: var(--bg-primary);
    line-height: 1.6;
    font-size: 16px;
}

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

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

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(22, 93, 255, 0.2);
}

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

.btn-outline:hover {
    background: var(--primary-light);
}

.btn-text {
    background: transparent;
    color: var(--text-secondary);
    padding: 12px 8px;
}

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

.btn-small {
    padding: 8px 16px;
    font-size: 14px;
    background: var(--primary);
    color: white;
    border-radius: 6px;
    text-decoration: none;
    transition: var(--transition);
}

.btn-small:hover {
    background: var(--primary-dark);
}

.btn.full-width {
    width: 100%;
}

/* 导航栏 */
.site-header {
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
}

.main-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 15px;
    transition: var(--transition);
}

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

.nav-apply {
    background: var(--primary-light);
    color: var(--primary) !important;
    padding: 8px 16px;
    border-radius: 6px;
}

.nav-apply:hover {
    background: #D0E3FF !important;
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-tertiary);
    font-size: 14px;
}

.nav-user a {
    font-size: 14px;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* Hero 区域 */
.hero {
    padding: 80px 0;
    background: linear-gradient(135deg, #F0F5FF 0%, #FFFFFF 100%);
}

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

.hero-content h1 {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    align-items: center;
}

.hero-banner img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

/* 通用 section 样式 */
section {
    padding: 80px 0;
}

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

.section-header h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.section-header p {
    font-size: 17px;
    color: var(--text-secondary);
}

/* 平台分类 */
.platform-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 24px;
}

.platform-card {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: var(--transition);
}

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

.platform-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    background-size: cover;
    background-position: center;
}

.platform-icon.douyin {
    background: linear-gradient(135deg, #000000 0%, #25F4EE 50%, #FE2C55 100%);
}

.platform-icon.kuaishou {
    background: linear-gradient(135deg, #FF4906 0%, #FF8800 100%);
}

.platform-icon.xiaohongshu {
    background: linear-gradient(135deg, #FE2C55 0%, #FF6B81 100%);
}

.platform-icon.shipinhao {
    background: linear-gradient(135deg, #07C160 0%, #2DC100 100%);
}

.platform-icon.bilibili {
    background: linear-gradient(135deg, #FB7299 0%, #23ADE5 100%);
}

.platform-icon.other {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
}

.platform-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.platform-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* 服务区域 */
.services {
    background: var(--bg-secondary);
}

.service-tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 10px 24px;
    border: 1px solid var(--border);
    background: var(--bg-primary);
    border-radius: 24px;
    font-size: 15px;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-secondary);
}

.tab-btn.active, .tab-btn:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.service-content {
    display: none;
}

.service-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

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

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 24px;
}

.service-card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid var(--border);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.service-card.feature {
    grid-column: span 1;
    border-color: var(--primary-light);
    background: linear-gradient(to bottom right, #FFFFFF 0%, #F7FAFF 100%);
}

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

.service-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 16px;
}

.service-meta {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.platform-tag, .type-tag {
    font-size: 12px;
    padding: 4px 10px;
    border-radius: 4px;
    font-weight: 500;
}

.platform-tag {
    background: var(--primary-light);
    color: var(--primary);
}

.type-tag {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.service-desc {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.service-specs {
    list-style: none;
    margin-bottom: 24px;
}

.service-specs li {
    padding: 6px 0;
    padding-left: 20px;
    position: relative;
    color: var(--text-secondary);
    font-size: 14px;
}

.service-specs li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
}

.service-footer {
    margin-top: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

.service-price {
    font-weight: 600;
    color: var(--primary);
    font-size: 16px;
}

/* 优势区域 */
.advantage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.advantage-item {
    text-align: center;
    padding: 32px 24px;
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.advantage-item:hover {
    background: var(--bg-secondary);
}

.advantage-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.advantage-item h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
}

.advantage-item p {
    color: var(--text-secondary);
    font-size: 15px;
}

/* 流程区域 */
.process {
    background: var(--bg-secondary);
}

.process-steps {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    position: relative;
}

.step-item {
    flex: 1;
    text-align: center;
    padding: 0 20px;
}

.step-number {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    margin: 0 auto 20px;
}

.step-item h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
}

.step-item p {
    color: var(--text-secondary);
    font-size: 15px;
}

.step-line {
    flex: 0.5;
    height: 2px;
    background: var(--border);
    margin-top: 30px;
}

/* 保障区域 */
.guarantee-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 24px;
}

.guarantee-item {
    padding: 28px;
    border-radius: var(--radius-lg);
    background: var(--bg-secondary);
}

.guarantee-item h4 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.guarantee-item p {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.7;
}

/* 资讯区域 - 严格遵循系统标签规则 */
.news {
    background: var(--bg-primary);
}

ul.article-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
    list-style: none;
    margin: 0;
    padding: 0;
    width: 100%;
    box-sizing: border-box;
}

ul.article-cards > li.article-card {
    min-width: 0;
    width: auto;
    max-width: none;
    margin: 0;
    float: none;
    box-sizing: border-box;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
}

ul.article-cards > li.article-card:hover {
    box-shadow: var(--shadow);
    transform: translateY(-4px);
}

.article-card .card-thumb {
    width: 100%;
    overflow: hidden;
    aspect-ratio: 16/9;
}

.article-card .card-thumb img {
    display: block;
    width: 100%;
    max-width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.article-card:hover .card-thumb img {
    transform: scale(1.05);
}

.article-card .card-body {
    padding: 20px;
}

.article-card .card-title {
    overflow-wrap: anywhere;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 12px;
    line-height: 1.5;
    color: var(--text-primary);
    text-decoration: none;
    display: block;
}

.article-card .card-title:hover {
    color: var(--primary);
}

.article-card .card-date {
    display: block;
    font-size: 13px;
    color: var(--text-tertiary);
    margin-bottom: 8px;
}

.article-card .card-summary {
    overflow-wrap: anywhere;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* FAQ 区域 */
.faq {
    background: var(--bg-secondary);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-primary);
    border-radius: var(--radius);
    margin-bottom: 16px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.faq-question {
    width: 100%;
    padding: 20px 24px;
    background: none;
    border: none;
    text-align: left;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-primary);
    font-family: inherit;
}

.faq-icon {
    font-size: 24px;
    color: var(--primary);
    transition: var(--transition);
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-answer p {
    padding: 0 24px 20px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* 关于我们 */
.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-content h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 24px;
}

.about-content p {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
    text-align: left;
}

.about-features {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-top: 48px;
    padding-top: 40px;
    border-top: 1px solid var(--border);
}

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

.feature-num {
    display: block;
    font-size: 36px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
}

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

/* 在线申请 */
.apply {
    background: var(--bg-secondary);
}

.apply-card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 48px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    box-shadow: var(--shadow);
}

.apply-info h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 16px;
}

.apply-info p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
}

.apply-contact {
    padding: 24px;
    background: var(--primary-light);
    border-radius: var(--radius);
}

.apply-contact p {
    margin-bottom: 8px;
    font-size: 15px;
}

.apply-contact a {
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
}

.apply-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group.full-width {
    grid-column: span 2;
}

.form-group label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input, .form-group select, .form-group textarea {
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 15px;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(22, 93, 255, 0.1);
}

/* 文章详情页 */
.article-breadcrumb {
    padding: 24px 0;
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
}

.article-breadcrumb a {
    color: var(--text-secondary);
    text-decoration: none;
}

.article-breadcrumb a:hover {
    color: var(--primary);
}

.article-content-wrap {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 0;
}

.article-header {
    margin-bottom: 32px;
}

.article-title {
    font-size: 32px;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 16px;
}

.article-meta {
    display: flex;
    flex-direction: column;
    gap: 8px;
    color: var(--text-tertiary);
    font-size: 14px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.article-summary {
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.7;
}

.article-cover {
    margin-bottom: 32px;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.article-cover img {
    width: 100%;
    height: auto;
    display: block;
}

.article-body {
    font-size: 17px;
    line-height: 1.8;
    color: var(--text-primary);
}

.article-body p {
    margin-bottom: 24px;
}

.article-body h2, .article-body h3 {
    margin: 32px 0 16px;
    font-weight: 600;
}

.article-body h2 {
    font-size: 24px;
}

.article-body h3 {
    font-size: 20px;
}

.article-body img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius);
    margin: 24px 0;
}

.article-service-cta {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px;
    background: var(--primary-light);
    border-radius: var(--radius-lg);
    text-align: center;
}

.article-service-cta h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 12px;
}

.article-service-cta p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

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

.article-back {
    max-width: 800px;
    margin: 32px auto;
}

.back-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 15px;
}

.back-link:hover {
    color: var(--primary);
}

.article-convert {
    background: var(--bg-secondary);
    padding: 60px 0;
}

.convert-card {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    padding: 48px;
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.convert-card h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 12px;
}

.convert-card p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

/* 页脚 */
.site-footer {
    background: #1D2129;
    color: #C9CDD4;
    padding: 60px 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand h3 {
    color: white;
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 16px;
}

.footer-brand p {
    line-height: 1.7;
    margin-bottom: 16px;
    font-size: 15px;
}

.footer-contact a {
    color: white;
    text-decoration: none;
}

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

.footer-links a, .footer-legal a {
    display: block;
    color: #C9CDD4;
    text-decoration: none;
    margin-bottom: 12px;
    font-size: 14px;
    transition: var(--transition);
}

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

.footer-copyright {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 14px;
}

/* 响应式适配 */
@media (max-width: 992px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-content h1 {
        font-size: 36px;
    }

    .apply-card {
        grid-template-columns: 1fr;
        padding: 32px;
    }

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

    .process-steps {
        flex-direction: column;
        gap: 24px;
        align-items: center;
    }

    .step-line {
        width: 2px;
        height: 40px;
        margin-top: 0;
    }

    .about-features {
        gap: 32px;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .nav-links {
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 20px;
        gap: 16px;
        border-bottom: 1px solid var(--border);
        display: none;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-user {
        padding-top: 16px;
        border-top: 1px solid var(--border);
        width: 100%;
    }

    .hero {
        padding: 40px 0;
    }

    .hero-content h1 {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .section-header h2 {
        font-size: 28px;
    }

    section {
        padding: 48px 0;
    }

    .platform-grid, .service-grid, .guarantee-grid {
        grid-template-columns: 1fr;
    }

    .apply-form {
        grid-template-columns: 1fr;
    }

    .form-group.full-width {
        grid-column: span 1;
    }

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

    .about-features {
        flex-direction: column;
        gap: 24px;
    }

    .article-title {
        font-size: 24px;
    }

    .article-body {
        font-size: 16px;
    }
}