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

body {
    font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    overflow-x: hidden;
    background-color: #F4F7FB;
    color: #2D3436;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

.section {
    padding: 100px 0;
    position: relative;
}

.section:nth-child(even) {
    background: #EDF2F7;
}

/* 导航 */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(108, 92, 231, 0.1);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 800;
    font-size: 1.4rem;
    text-decoration: none;
    color: #2D3436;
    letter-spacing: -0.5px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #6C5CE7, #00CEC9);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: #fff;
    font-weight: 700;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 36px;
    list-style: none;
}

.main-nav a {
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    color: #636E72;
    transition: color 0.3s ease;
    position: relative;
    padding-bottom: 4px;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, #6C5CE7, #00CEC9);
    transition: width 0.3s ease;
    border-radius: 2px;
}

.main-nav a:hover {
    color: #2D3436;
}

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

.nav-cta {
    padding: 10px 28px;
    border-radius: 50px;
    color: #fff !important;
    background: linear-gradient(135deg, #6C5CE7, #00CEC9);
    font-weight: 700;
    box-shadow: 0 4px 16px rgba(108, 92, 231, 0.25);
    transition: all 0.3s ease !important;
}

.nav-cta::after {
    display: none;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(108, 92, 231, 0.35);
    color: #fff !important;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.8rem;
    cursor: pointer;
    color: #2D3436;
    padding: 8px;
    line-height: 1;
}

/* Hero */
.hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    margin-top: 72px;
}

.hero::before {
    content: '28';
    position: absolute;
    top: -15%;
    right: -5%;
    font-size: 45vw;
    font-weight: 900;
    color: rgba(108, 92, 231, 0.04);
    line-height: 1;
    pointer-events: none;
    letter-spacing: -20px;
}

.hero-content {
    max-width: 680px;
    position: relative;
    z-index: 2;
}

.hero-eyebrow {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 6px 20px;
    border-radius: 50px;
    background: rgba(0, 206, 201, 0.08);
    color: #00CEC9;
    letter-spacing: 2px;
    margin-bottom: 20px;
    text-transform: uppercase;
    border: 1px solid rgba(0, 206, 201, 0.15);
}

.hero h1 {
    font-size: 3.4rem;
    line-height: 1.1;
    margin-bottom: 20px;
    font-weight: 900;
    letter-spacing: -1.5px;
    color: #1a1a2e;
}

.hero p {
    font-size: 1.15rem;
    color: #636E72;
    max-width: 520px;
    margin-bottom: 40px;
    line-height: 1.8;
}

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

.hero-image {
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 24px 48px rgba(108, 92, 231, 0.08);
    background: #EDF2F7;
}

.hero-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 34px;
    border-radius: 50px;
    font-weight: 700;
    cursor: pointer;
    border: none;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 0.95rem;
    letter-spacing: 0.3px;
}

.btn-primary {
    background: linear-gradient(135deg, #6C5CE7, #00CEC9);
    color: #fff;
    box-shadow: 0 8px 24px rgba(108, 92, 231, 0.25);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 16px 32px rgba(108, 92, 231, 0.35);
}

.btn-outline {
    background: transparent;
    border: 2px solid #6C5CE7;
    color: #6C5CE7;
}

.btn-outline:hover {
    background: #6C5CE7;
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(108, 92, 231, 0.2);
}

/* 标签/标题 */
.section-label {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 3px;
    margin-bottom: 12px;
    text-transform: uppercase;
    color: #6C5CE7;
}

.section-title {
    font-size: 2.4rem;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
    color: #1a1a2e;
}

.section-desc {
    max-width: 640px;
    color: #636E72;
    margin-bottom: 48px;
    font-size: 1.05rem;
    line-height: 1.8;
}

/* 卡片网格 */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 28px;
}

.category-card {
    background: rgba(255, 255, 255, 0.65);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.8);
    border-radius: 24px;
    padding: 36px 32px;
    transition: all 0.3s ease;
}

.category-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(108, 92, 231, 0.08);
    border-color: rgba(108, 92, 231, 0.15);
    background: rgba(255, 255, 255, 0.85);
}

.card-icon {
    width: 60px;
    height: 60px;
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    font-size: 1.6rem;
    background: linear-gradient(135deg, rgba(108, 92, 231, 0.08), rgba(0, 206, 201, 0.08));
    color: #6C5CE7;
}

.card-link {
    font-weight: 700;
    font-size: 0.85rem;
    text-decoration: none;
    color: #6C5CE7;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: gap 0.3s ease;
}

.card-link::after {
    content: '→';
    font-size: 1.1rem;
    transition: transform 0.3s ease;
}

.card-link:hover {
    gap: 10px;
}

.card-link:hover::after {
    transform: translateX(4px);
}

/* 特性块 */
.feature-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 72px;
    align-items: center;
}

.feature-image {
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.04);
    background: #EDF2F7;
}

.feature-image img {
    width: 100%;
    height: auto;
    display: block;
}

.feature-text h3 {
    font-size: 1.6rem;
    margin-bottom: 16px;
    font-weight: 700;
}

.feature-text p {
    color: #636E72;
    line-height: 1.8;
}

.feature-list {
    list-style: none;
    margin-top: 28px;
}

.feature-list li {
    padding: 12px 0;
    display: flex;
    align-items: center;
    gap: 14px;
    font-weight: 500;
    border-bottom: 1px solid rgba(108, 92, 231, 0.04);
}

.feature-list li::before {
    content: '✓';
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: linear-gradient(135deg, #6C5CE7, #00CEC9);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    flex-shrink: 0;
}

/* 数据 */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    text-align: center;
}

.stat-item {
    padding: 36px 16px;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.8);
    transition: transform 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-4px);
}

.stat-number {
    font-size: 3rem;
    font-weight: 900;
    background: linear-gradient(135deg, #6C5CE7, #00CEC9);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.stat-label {
    font-size: 0.9rem;
    color: #636E72;
    margin-top: 8px;
    font-weight: 500;
}

/* 内容墙 */
.content-wall {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 28px;
}

.content-wall-item {
    border-radius: 24px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(4px);
    border: 1px solid #EDF2F7;
    transition: all 0.3s ease;
}

.content-wall-item:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 32px rgba(108, 92, 231, 0.06);
    border-color: rgba(108, 92, 231, 0.1);
}

.content-wall-item img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    display: block;
}

.content-wall-body {
    padding: 28px 24px;
}

.content-wall-body h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.content-wall-body p {
    color: #636E72;
    font-size: 0.9rem;
    line-height: 1.7;
}

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

.faq-item {
    border: 1px solid #EDF2F7;
    border-radius: 16px;
    margin-bottom: 12px;
    overflow: hidden;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: rgba(108, 92, 231, 0.3);
}

.faq-item .faq-question {
    padding: 22px 28px;
    font-weight: 700;
    font-size: 1.05rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #1a1a2e;
    user-select: none;
}

.faq-item .faq-question::after {
    content: '+';
    font-size: 1.8rem;
    color: #6C5CE7;
    font-weight: 300;
    transition: transform 0.3s ease;
    line-height: 1;
}

.faq-item.open .faq-question::after {
    transform: rotate(45deg);
}

.faq-item .faq-answer {
    padding: 0 28px 22px;
    display: none;
    color: #636E72;
    line-height: 1.8;
}

.faq-item.open .faq-answer {
    display: block;
    animation: fadeSlideIn 0.3s ease;
}

@keyframes fadeSlideIn {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* CTA横幅 */
.cta-banner {
    padding: 80px 24px;
    text-align: center;
    border-radius: 28px;
    background: linear-gradient(135deg, #6C5CE7, #00CEC9);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.cta-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    pointer-events: none;
}

.cta-banner h2 {
    color: #fff;
    font-size: 2.4rem;
    font-weight: 800;
    margin-bottom: 12px;
    position: relative;
}

.cta-banner p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 1.1rem;
    margin-bottom: 32px;
    position: relative;
}

.cta-banner .btn-primary {
    background: #fff;
    color: #6C5CE7;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    position: relative;
}

.cta-banner .btn-primary:hover {
    background: #F4F7FB;
    transform: translateY(-3px);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.15);
}

/* 页脚 */
.site-footer {
    padding: 72px 0 32px;
    border-top: 1px solid #EDF2F7;
}

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

.footer-brand p {
    color: #636E72;
    max-width: 300px;
    margin-top: 12px;
    line-height: 1.8;
}

.footer-col h4 {
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: #2D3436;
    letter-spacing: 0.5px;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    color: #636E72;
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s ease;
}

.footer-col ul li a:hover {
    color: #6C5CE7;
}

.footer-bottom {
    border-top: 1px solid #EDF2F7;
    margin-top: 48px;
    padding-top: 24px;
    text-align: center;
    font-size: 0.85rem;
    color: #636E72;
}

/* 工具类 */
.text-accent {
    color: #6C5CE7;
}

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

.seo-description {
    max-width: 600px;
    margin: 0 auto 48px;
    color: #636E72;
    line-height: 1.8;
}

.mt-0 {
    margin-top: 0;
}

.mb-0 {
    margin-bottom: 0;
}

/* 响应式 */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .hero h1 {
        font-size: 2.8rem;
    }
    .hero::before {
        font-size: 60vw;
        top: -10%;
    }
}

@media (max-width: 768px) {
    .feature-block {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .stats-bar {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    .main-nav {
        display: none;
    }
    .menu-toggle {
        display: flex;
    }
    .main-nav.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: rgba(255, 255, 255, 0.98);
        padding: 28px 24px;
        gap: 20px;
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-bottom: 1px solid #EDF2F7;
        box-shadow: 0 24px 48px rgba(0, 0, 0, 0.04);
    }
    .main-nav.open a {
        font-size: 1.05rem;
    }
    .hero {
        margin-top: 72px;
    }
    .hero::before {
        font-size: 80vw;
        top: -5%;
    }
    .hero h1 {
        font-size: 2.2rem;
    }
    .section-title {
        font-size: 1.8rem;
    }
    .stat-number {
        font-size: 2.2rem;
    }
    .cta-banner h2 {
        font-size: 1.8rem;
    }
}

@media (max-width: 480px) {
    .cards-grid,
    .content-wall,
    .stats-bar {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .hero-buttons {
        flex-direction: column;
    }
    .hero h1 {
        font-size: 1.8rem;
    }
    .section-title {
        font-size: 1.5rem;
    }
    .section {
        padding: 60px 0;
    }
    .cta-banner {
        padding: 48px 20px;
    }
    .cta-banner h2 {
        font-size: 1.5rem;
    }
}