/* 全局重置与变量 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #e94560;
    --secondary: #1a1a2e;
    --accent: #0f3460;
    --bg: #f8f9fa;
    --card-bg: rgba(255, 255, 255, 0.8);
    --text: #1a1a2e;
    --glass: rgba(255, 255, 255, 0.25);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    --radius: 20px;
    --transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

[data-theme="dark"] {
    --primary: #e94560;
    --secondary: #f8f9fa;
    --accent: #4a9eff;
    --bg: #0f0f1a;
    --card-bg: rgba(30, 30, 50, 0.8);
    --text: #e0e0e0;
    --glass: rgba(30, 30, 50, 0.5);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

body {
    font-family: var(--font-family);
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    transition: var(--transition);
    overflow-x: hidden;
}

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

a:hover {
    opacity: 0.8;
}

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

/* 玻璃效果 */
.glass {
    background: var(--glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

/* 卡片 */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(8px);
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

/* 按钮 */
.btn {
    display: inline-block;
    padding: 14px 32px;
    background: linear-gradient(135deg, var(--primary), #ff6b81);
    color: #fff;
    border-radius: 50px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.btn:hover {
    transform: scale(1.03);
    box-shadow: 0 8px 25px rgba(233, 69, 96, 0.4);
}

/* 区块 */
.section {
    padding: 80px 0;
    position: relative;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: center;
}

.section-sub {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 50px;
    font-size: 1.1rem;
    opacity: 0.8;
}

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

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 滚动动画 */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 头部 */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding: 0 20px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: var(--transition);
}

.logo {
    font-size: 1.8rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary), #ff6b81);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
}

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

.nav a {
    color: var(--text);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 8px 0;
    position: relative;
}

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

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

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.8rem;
    cursor: pointer;
}

/* 主视觉 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--secondary), var(--accent), var(--secondary));
    padding-top: 70px;
}

.hero::before {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(233, 69, 96, 0.15), transparent);
    top: -200px;
    right: -200px;
    animation: pulse 8s infinite;
}

.hero::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(79, 172, 254, 0.1), transparent);
    bottom: -150px;
    left: -150px;
    animation: pulse 6s infinite reverse;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
    padding: 40px;
}

.hero h1 {
    font-size: 3.8rem;
    font-weight: 900;
    margin-bottom: 20px;
    line-height: 1.2;
    color: #fff;
    text-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.hero p {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

/* Banner 轮播 */
.banner-slider {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius);
    margin: 40px 0;
}

.banner-slide {
    display: none;
    padding: 60px 40px;
    text-align: center;
    background: linear-gradient(135deg, var(--accent), var(--secondary));
    color: #fff;
    min-height: 300px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 10px;
    border-radius: var(--radius);
}

.banner-slide.active {
    display: flex;
}

.banner-slide h2 {
    font-size: 2rem;
    margin-bottom: 15px;
}

.banner-slide p {
    max-width: 600px;
    opacity: 0.9;
}

.banner-dots {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 20px;
}

.banner-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: var(--transition);
}

.banner-dots span.active {
    background: var(--primary);
    transform: scale(1.2);
}

/* 统计数据 */
.stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin: 60px 0;
}

.stat-item {
    text-align: center;
    padding: 30px 20px;
    background: var(--glass);
    border-radius: var(--radius);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.stat-number {
    font-size: 2.8rem;
    font-weight: 900;
    color: var(--primary);
}

.stat-label {
    font-size: 1rem;
    opacity: 0.8;
    margin-top: 8px;
}

/* 关于 */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-text p {
    margin-bottom: 20px;
    font-size: 1.05rem;
}

.about-image svg {
    border-radius: var(--radius);
    width: 100%;
    height: auto;
}

/* 团队 */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 30px;
}

.team-card {
    text-align: center;
    padding: 30px 20px;
}

.team-card svg {
    border-radius: 50%;
    width: 120px;
    height: 120px;
    margin-bottom: 15px;
    background: var(--glass);
}

.team-card h4 {
    margin-bottom: 5px;
    font-size: 1.2rem;
}

.team-card p {
    opacity: 0.7;
    font-size: 0.95rem;
}

/* 产品卡片 */
.product-card {
    padding: 30px;
    text-align: center;
}

.product-card svg {
    width: 80px;
    height: 80px;
    margin-bottom: 20px;
    border-radius: 16px;
}

.product-card h3 {
    margin-bottom: 15px;
    font-size: 1.4rem;
}

.product-card p {
    opacity: 0.8;
    margin-bottom: 20px;
}

/* 服务列表 */
.service-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 25px;
}

.service-item {
    text-align: center;
    padding: 30px 20px;
}

.service-item svg {
    width: 60px;
    height: 60px;
    margin-bottom: 15px;
}

.service-item h3 {
    margin-bottom: 10px;
}

/* FAQ */
.faq-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 20px 0;
    cursor: pointer;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-size: 1.1rem;
}

.faq-question span {
    font-size: 1.5rem;
    transition: var(--transition);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, opacity 0.4s ease;
    opacity: 0;
    padding-top: 0;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    opacity: 1;
    padding-top: 15px;
}

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

/* 步骤 */
.howto-steps {
    counter-reset: step;
}

.howto-step {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
    padding: 25px;
    background: var(--glass);
    border-radius: var(--radius);
    align-items: flex-start;
}

.howto-step::before {
    counter-increment: step;
    content: counter(step);
    min-width: 40px;
    height: 40px;
    background: var(--primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
}

.howto-step h4 {
    margin-bottom: 8px;
}

/* 文章卡片 */
.articles .article-card {
    padding: 25px;
}

.article-card .date {
    font-size: 0.85rem;
    opacity: 0.6;
    margin-bottom: 10px;
    display: block;
}

.article-card h3 {
    margin-bottom: 12px;
    font-size: 1.3rem;
}

.article-card p {
    opacity: 0.8;
    margin-bottom: 15px;
}

.article-card .btn {
    padding: 10px 24px;
    font-size: 0.9rem;
}

/* 订阅 */
.newsletter {
    text-align: center;
    padding: 60px 30px;
    background: linear-gradient(135deg, var(--accent), var(--secondary));
    border-radius: var(--radius);
    color: #fff;
    margin: 60px 0;
}

.newsletter h2 {
    font-size: 2rem;
    margin-bottom: 15px;
}

.newsletter p {
    margin-bottom: 30px;
    opacity: 0.9;
}

.newsletter input {
    padding: 14px 20px;
    border-radius: 50px;
    border: none;
    width: 300px;
    max-width: 100%;
    margin-right: 10px;
    font-size: 1rem;
}

.newsletter .btn {
    margin-top: 10px;
}

/* 联系 */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.contact-info p {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.contact-info svg {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px 18px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: var(--glass);
    color: var(--text);
    font-size: 1rem;
    margin-bottom: 15px;
    transition: var(--transition);
}

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

.contact-form textarea {
    min-height: 120px;
    resize: vertical;
}

/* 页脚 */
.footer {
    background: var(--secondary);
    color: rgba(255, 255, 255, 0.85);
    padding: 60px 0 30px;
    margin-top: 80px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer h4 {
    color: #fff;
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.footer a {
    color: rgba(255, 255, 255, 0.7);
    display: block;
    margin-bottom: 10px;
    font-size: 0.95rem;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    text-align: center;
    font-size: 0.9rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
}

.footer-bottom span {
    opacity: 0.7;
}

.qrcode {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.qrcode svg {
    width: 100px;
    height: 100px;
    border-radius: 12px;
    background: #fff;
    padding: 8px;
}

/* 返回顶部 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 4px 20px rgba(233, 69, 96, 0.3);
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: scale(1.1);
}

/* 搜索模态框 */
.search-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
}

.search-modal.open {
    display: flex;
}

.search-modal-content {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 40px;
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
}

.search-modal input {
    width: 100%;
    padding: 14px 20px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: var(--glass);
    color: var(--text);
    font-size: 1.1rem;
    margin-bottom: 20px;
}

.search-modal .search-results {
    max-height: 300px;
    overflow-y: auto;
}

.search-modal .search-results div {
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

/* 暗黑模式切换按钮 */
.dark-toggle {
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.4rem;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: var(--transition);
}

.dark-toggle:hover {
    background: var(--glass);
}

/* 响应式 */
@media (max-width: 768px) {
    .nav {
        display: none;
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--glass);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        flex-direction: column;
        padding: 20px;
        gap: 15px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .nav.open {
        display: flex;
    }

    .menu-toggle {
        display: block;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero p {
        font-size: 1rem;
    }

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

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

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

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

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

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.8rem;
    }

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

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

    .section {
        padding: 50px 0;
    }
}