/* 英雄区域 - 调整手机端上边距 */
.hero {
    padding: 140px 0 80px;
    background: var(--hero-gradient);
    position: relative;
    overflow: hidden;
}

@media (max-width: 768px) {
    .hero {
        padding: 120px 0 60px;
    }
}

.hero::before {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(52, 152, 219, 0.1) 0%, rgba(52, 152, 219, 0) 70%);
    top: 10%;
    right: 10%;
    border-radius: 50%;
}

.light-theme .hero::before,
.dark-theme .hero::before {
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0) 70%);
}

.hero-content {
    max-width: 700px;
    position: relative;
    z-index: 2;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    line-height: 1.2;
    color: white;
}

@media (max-width: 992px) {
    .hero h1 {
        font-size: 2.8rem;
    }
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.3rem;
    }
}

@media (max-width: 576px) {
    .hero h1 {
        font-size: 2rem;
    }
}

.hero h1 span {
    color: var(--accent);
}

.hero p {
    font-size: 1.3rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 30px;
}

@media (max-width: 768px) {
    .hero p {
        font-size: 1.1rem;
    }
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

@media (max-width: 576px) {
    .hero-buttons {
        flex-direction: column;
        gap: 15px;
    }
    
    .hero-buttons a {
        width: 100%;
        text-align: center;
    }
}

.btn-secondary {
    background-color: transparent;
    color: white;
    border: 2px solid white;
    padding: 10px 24px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-block;
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-3px);
}

/* 功能区域 - 增强的功能卡片 */
.features {
    padding: 100px 0;
    background-color: var(--bg-secondary);
}

@media (max-width: 768px) {
    .features {
        padding: 70px 0;
    }
}

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

@media (max-width: 768px) {
    .section-title {
        margin-bottom: 40px;
    }
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--text-primary);
    margin-bottom: 15px;
}

@media (max-width: 768px) {
    .section-title h2 {
        font-size: 2rem;
    }
}

.section-title p {
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
    font-size: 1.2rem;
}

@media (max-width: 768px) {
    .section-title p {
        font-size: 1rem;
        padding: 0 15px;
    }
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
}

@media (max-width: 768px) {
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

.feature-card {
    background-color: var(--bg-card);
    border-radius: 15px;
    padding: 30px;
    transition: transform 0.3s, box-shadow 0.3s;
    border-top: 4px solid var(--primary);
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-color);
    position: relative;
}

@media (max-width: 768px) {
    .feature-card {
        padding: 20px;
    }
}

.feature-icon {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-muted);
    flex-grow: 1;
    margin-bottom: 15px;
}

/* 新增功能详情区域 */
.feature-details {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.feature-details ul {
    list-style-type: none;
    margin-top: 10px;
}

.feature-details li {
    color: var(--text-secondary);
    margin-bottom: 8px;
    padding-left: 20px;
    position: relative;
    font-size: 0.95rem;
}

.feature-details li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: bold;
}

.feature-tag {
    display: inline-block;
    background-color: rgba(26, 188, 156, 0.2);
    color: var(--accent);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-top: 15px;
}

.light-theme .feature-tag {
    background-color: rgba(26, 188, 156, 0.15);
    color: var(--accent-dark);
}

.dark-theme .feature-tag {
    background-color: rgba(26, 188, 156, 0.25);
    color: var(--accent);
}

/* 应用场景展示区 */
.use-cases {
    padding: 100px 0;
    background-color: var(--bg-color);
}

@media (max-width: 768px) {
    .use-cases {
        padding: 70px 0;
    }
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

@media (max-width: 768px) {
    .cases-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

.case-card {
    background-color: var(--bg-card);
    border-radius: 15px;
    padding: 30px;
    border: 1px solid var(--border-color);
    transition: transform 0.3s;
}

.case-icon {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.case-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.case-card p {
    color: var(--text-muted);
}

.topology-center {
    position: absolute;
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.8rem;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

@media (max-width: 768px) {
    .topology-center {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
}

.topology-node {
    position: absolute;
    width: 50px;
    height: 50px;
    background-color: var(--bg-card);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1.3rem;
    border: 2px solid var(--primary);
    z-index: 1;
    transition: all 0.3s;
}

@media (max-width: 768px) {
    .topology-node {
        width: 45px;
        height: 45px;
        font-size: 1.2rem;
    }
}

.topology-node:hover {
    transform: scale(1.1);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.3);
    background-color: var(--primary);
    color: white;
}

.topology-connection {
    position: absolute;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), transparent);
    transform-origin: left center;
    z-index: 0;
}

.topology-pulse {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: rgba(52, 152, 219, 0.2);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(0.8);
        opacity: 1;
    }
    70% {
        transform: scale(1.3);
        opacity: 0;
    }
    100% {
        transform: scale(1.3);
        opacity: 0;
    }
}

/* 优势区域 */
.advantages {
    padding: 100px 0;
    background-color: var(--bg-color);
}

@media (max-width: 768px) {
    .advantages {
        padding: 70px 0;
    }
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

@media (max-width: 768px) {
    .advantages-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

.advantage-card {
    text-align: center;
    padding: 30px;
    background-color: var(--bg-card);
    border-radius: 15px;
    border: 1px solid var(--border-color);
}

@media (max-width: 768px) {
    .advantage-card {
        padding: 20px;
    }
}

.advantage-icon {
    font-size: 3rem;
    color: var(--accent);
    margin-bottom: 20px;
}

.advantage-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.advantage-card p {
    color: var(--text-muted);
}

/* CTA区域 */
.cta-section {
    padding: 100px 0;
    background: var(--hero-gradient);
    text-align: center;
}

@media (max-width: 768px) {
    .cta-section {
        padding: 70px 0;
    }
}

.cta-section h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: white;
}

@media (max-width: 768px) {
    .cta-section h2 {
        font-size: 2rem;
    }
}

.cta-section p {
    color: rgba(255, 255, 255, 0.9);
    max-width: 700px;
    margin: 0 auto 40px;
    font-size: 1.2rem;
}

@media (max-width: 768px) {
    .cta-section p {
        font-size: 1rem;
        padding: 0 15px;
    }
}