:root {
    --primary: #4361ee;
    --secondary: #06d6a0;
    --accent: #ff6b6b;
    --dark: #0f172a;
    --light: #f8fafc;
    --gray: #64748b;
    --light-gray: #e2e8f0;
    --border-radius: 12px;
    --box-shadow: 0 5px 25px rgba(0, 0, 0, 0.1);
    --transition: all 0.4s ease;

    
    --primary-dark: #0c1a28;
    --accent-primary: #2ec4b6;
    --accent-secondary: #1a8c7f;
    --card-bg: rgba(18, 30, 52, 0.8);
    --text-light: #e0f0ff;
    --success: #27ae60;
    --highlight: #ff9f1c;
    --gradient-start: #0c1a28;
    --gradient-end: #081320;
}



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

body {
    font-family: 'Noto Sans SC', 'Poppins', sans-serif;
    background-color: var(--light);
    color: #333;
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* 顶部导航栏 - 深色 */
.nav-main {
    background-color: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
}

.logo-icon .headphoto img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    overflow: hidden;
    margin-right: 10px;
    display: inline-block;
    vertical-align: middle;
}
.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-title {
    font-size: 22px;
    font-weight: 700;
    color: white;
    letter-spacing: 0.5px;
}

.logo-subtitle {
    font-size: 12px;
    color: var(--light-gray);
    margin-top: 2px;
}

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

.nav-item {
    position: relative;
}

.nav-link {
    color: var(--light-gray);
    text-decoration: none;
    font-weight: 500;
    font-size: 16px;
    transition: var(--transition);
    padding: 5px 0;
}

.nav-link:hover {
    color: white;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--secondary);
    transition: var(--transition);
}

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

.nav-btn {
    background: linear-gradient(135deg, var(--secondary), #06d6a0);
    color: var(--dark);
    border: none;
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-size: 16px;
    box-shadow: 0 4px 15px rgba(6, 214, 160, 0.3);
}

.nav-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(6, 214, 160, 0.4);
}

/* 横幅区域 - 带背景图 */
.hero-section {
    padding: 150px 0 100px;
    background: linear-gradient(rgba(15, 23, 42, 0.8), rgba(15, 23, 42, 0.9)), url('../images/banner_bg.jpg') no-repeat center center;
    background-size: cover;
    color: white;
    text-align: center;
    position: relative;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.2;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--light-gray);
    margin-bottom: 40px;
    line-height: 1.6;
}

.value-container {
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 30px;
    margin: 30px 0;
    backdrop-filter: blur(5px);
}

.value-item {
    font-size: 1.2rem;
    margin: 15px 0;
    color: white;
}

.highlight {
    background: linear-gradient(135deg, var(--secondary), #06d6a0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 600;
}

.features-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    margin: 30px 0;
}

.feature-tag {
    background: rgba(255, 255, 255, 0.15);
    padding: 12px 25px;
    border-radius: 50px;
    font-weight: 500;
    color: white;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.feature-tag:hover {
    background: rgba(6, 214, 160, 0.3);
    transform: translateY(-5px);
}

.cta-btn {
    display: inline-block;
    background: linear-gradient(135deg, var(--secondary), #06d6a0);
    color: var(--dark);
    padding: 16px 45px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    font-size: 1.1rem;
    margin-top: 20px;
    box-shadow: 0 4px 15px rgba(6, 214, 160, 0.3);
    transition: var(--transition);
}

.cta-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(6, 214, 160, 0.4);
}

/* 关于我们区域 - 浅色背景 */
.about-section {
    padding: 100px 0;
    background-color: white;
}

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

.section-title {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: #06d6a0;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, var(--primary), #3a86ff);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--gray);
    max-width: 700px;
    margin: 20px auto 0;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 40px;
}

.about-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 40px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.about-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.about-card h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--dark);
}

.about-card p {
    margin-bottom: 20px;
    color: var(--gray);
    line-height: 1.8;
}

.stats-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.stat-box {
    text-align: center;
    padding: 25px;
    background: var(--light);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.stat-box:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.08);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 10px;
}

.stat-label {
    font-size: 1rem;
    color: var(--gray);
}

.service-card {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 30px;
}

.service-icon {
    min-width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary), #3a86ff);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
}

.service-content h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: var(--dark);
}

.service-content p {
    color: var(--gray);
    line-height: 1.8;
}

/* 服务区域 - 深色背景 */
.services-section {
    padding: 100px 0;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.98));
    color: white;
}

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

.service-item {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.service-item:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.service-icon-large {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary), #3a86ff);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: white;
    font-size: 30px;
}

.service-item h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: white;
}

.service-item p {
    color: var(--light-gray);
    line-height: 1.8;
}

/* 投放方式区域 - 浅色背景 */
.methods-section {
    padding: 100px 0 50px;
    background-color: white;
}

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

.methods-title {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--dark);
}

.methods-subtitle {
    font-size: 1.3rem;
    color: var(--gray);
    max-width: 800px;
    margin: 0 auto;
}

.methods-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    max-width: 900px;
    margin: 0 auto;
}

.method-item {
    background: var(--light);
    padding: 15px 30px;
    border-radius: 50px;
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid var(--light-gray);
}

.method-item:hover {
    background: linear-gradient(135deg, var(--primary), #3a86ff);
    color: white;
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(67, 97, 238, 0.3);
    border-color: var(--primary);
}

/* 为什么选择我们 - 深色背景 */
.why-section {
    padding: 100px 0;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.98));
    color: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.feature-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--secondary), #06d6a0);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: var(--dark);
    font-size: 30px;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: white;
}

.feature-card p {
    color: var(--light-gray);
    line-height: 1.8;
}

/* 合作号召区域 - 浅色背景 */
.cooperation-section {
    padding: 0 0 100px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(248, 250, 252, 0.9));
    text-align: center;
}

.cooperation-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 60px;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    position: relative;
    overflow: hidden;
}

.cooperation-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.cooperation-title {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: #3a86ff;
}

.cooperation-subtitle {
    font-size: 1.3rem;
    color: var(--gray);
    margin-bottom: 40px;
}

.cooperation-btn {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary), #3a86ff);
    color: white;
    padding: 16px 45px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    font-size: 1.1rem;
    box-shadow: 0 4px 15px rgba(67, 97, 238, 0.3);
    transition: var(--transition);
}

.cooperation-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(67, 97, 238, 0.4);
}

/* 案例展示区域 - 深色背景 + Swiper轮播 */
.cases-section {
    padding: 100px 0;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.98));
    color: white;
}

.swiper {
    width: 100%;
    padding: 50px 0;
}

.swiper-slide {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    overflow: hidden;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
    display: flex;
    justify-content: center;
    align-items: center;
}

.swiper-slide:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.slide-img {
    height: 200px;
    overflow: hidden;
}

.slide-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.swiper img {
    max-height: 100%;
    max-width: 100%;
}

.swiper-slide:hover .slide-img img {
    transform: scale(1.1);
}

.slide-content {
    padding: 30px;
}

.slide-content h4 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: white;
}

.slide-content p {
    color: var(--light-gray);
    margin-bottom: 20px;
}

.slide-metrics {
    display: flex;
    justify-content: space-between;
    background: rgba(255, 255, 255, 0.05);
    padding: 15px;
    border-radius: var(--border-radius);
}

.metric {
    text-align: center;
    flex: 1;
}

.metric-value {
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--secondary), #06d6a0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.metric-label {
    font-size: 0.9rem;
    color: var(--light-gray);
}

.swiper-button-next,
.swiper-button-prev {
    color: var(--secondary) !important;
}

.swiper-pagination-bullet-active {
    background: var(--secondary) !important;
}

/* 账户对比区域 - 浅色背景 */
.comparison-section {
    padding: 100px 0;
    background-color: rgba(15, 23, 42, 0.98);
    ;
}

.comparison-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 30px;
}

.comparison-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 40px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    border: 1px solid var(--light-gray);
}

.comparison-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
    border-color: var(--primary);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 30px;
}

.card-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary), #3a86ff);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
}

.card-title {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--dark);
}

.feature-list {
    list-style: none;
    margin-bottom: 30px;
}

.feature-list li {
    padding: 12px 0;
    position: relative;
    padding-left: 35px;
    border-bottom: 1px solid var(--light-gray);
}

.feature-list li::before {
    content: '\f00c';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    color: var(--primary);
    font-size: 18px;
}

.feature-list li:last-child {
    border-bottom: none;
}

.ad-types-title {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: var(--dark);
    font-weight: 600;
}

.ad-types {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.ad-type {
    background: var(--light);
    padding: 8px 15px;
    border-radius: 50px;
    font-size: 0.9rem;
    color: var(--gray);
}

/* 页脚区域 - 深色背景 */
.footer-section {
    background: var(--dark);
    color: white;
    padding: 80px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 60px;
}

.footer-column h4 {
    font-size: 1.4rem;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 15px;
}

.footer-column h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--secondary);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 15px;
}

.footer-links a {
    color: #adb5bd;
    text-decoration: none;
    transition: var(--transition);
    display: flex;
    align-items: center;
}

.footer-links a i {
    margin-right: 10px;
    color: var(--secondary);
    transition: var(--transition);
}

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

.footer-links a:hover i {
    transform: translateX(5px);
}

.contact-info {
    color: #adb5bd;
    line-height: 2;
}

.contact-info i {
    color: var(--secondary);
    margin-right: 10px;
    width: 20px;
}

.footer-btn {
    display: inline-block;
    background: linear-gradient(135deg, var(--secondary), #06d6a0);
    color: var(--dark);
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    margin-top: 20px;
    transition: var(--transition);
}

.footer-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(6, 214, 160, 0.4);
}

.copyright {
    text-align: center;
    padding-top: 30px;
    color: #64748b;
    font-size: 0.9rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .hero-title {
        font-size: 3rem;
    }

    .section-title {
        font-size: 2.5rem;
    }
}

@media (max-width: 992px) {
    .nav-links {
        gap: 20px;
    }

    .hero-title {
        font-size: 2.5rem;
    }

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

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

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

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .methods-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 1.8rem;
    }

    .feature-tag {
        width: 100%;
    }

    .cta-btn {
        padding: 14px 30px;
        font-size: 1rem;
    }
}