/* ===== 基础重置与全局样式 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html, body {
    height: 100%;
    width: 100%;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: #ffffff;
    color: #0a0a0a;
    -webkit-font-smoothing: antialiased;
}
* {
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    -webkit-touch-callout: none;
}
.about-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: #ffffff;
}
/* ===== 页面头部 ===== */
.page-header {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    height: 56px;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid #e5e5e5;
    display: flex;
    align-items: center;
    justify-content: space-between;
    z-index: 100;
    padding: 0 16px;
    animation: fadeInDown 0.5s ease both;
}
.back-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    background: transparent;
    border: 1px solid #e5e5e5;
    border-radius: 8px;
    color: #0a0a0a;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}
.back-btn:hover {
    background: #0a0a0a;
    color: #fff;
    border-color: #0a0a0a;
}
.page-title {
    font-size: 17px;
    font-weight: 600;
    letter-spacing: 0.5px;
}
.spacer {
    width: 74px;
}
/* ===== 主内容区 ===== */
.about-content {
    flex: 1;
    padding: 24px 16px 48px;
    max-width: 600px;
    margin: 0 auto;
    width: 100%;
}
/* ===== 通用卡片样式 ===== */
.card {
    background: #fafafa;
    border: 1px solid #e5e5e5;
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 20px;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    animation: fadeInUp 0.6s ease both;
}
.card:hover {
    transform: translateY(-3px);
    border-color: #d4d4d4;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.06);
}
.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}
.card-label {
    font-size: 11px;
    font-weight: 700;
    color: #999;
    text-transform: uppercase;
    letter-spacing: 0.8px;
}
.card-icon {
    width: 40px;
    height: 40px;
    background: #fff;
    border: 1px solid #e5e5e5;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: #0a0a0a;
    transition: all 0.3s ease;
}
.card:hover .card-icon {
    border-color: #d4d4d4;
    transform: scale(1.08);
}
/* ===== 开发者信息卡片 ===== */
.developer-card {
    text-align: center;
    animation-delay: 0.05s;
}
.avatar-wrapper {
    width: 120px;
    height: 120px;
    margin: 0 auto 20px;
    border-radius: 50%;
    border: 3px solid #e5e5e5;
    overflow: hidden;
    transition: all 0.3s ease;
}
.developer-card:hover .avatar-wrapper {
    border-color: #0a0a0a;
    transform: scale(1.05);
}
.avatar {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.developer-name {
    font-size: 24px;
    font-weight: 800;
    margin-bottom: 6px;
    letter-spacing: -0.5px;
}
.developer-title {
    font-size: 14px;
    color: #666;
    margin-bottom: 20px;
}
.developer-links {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}
.link-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 18px;
    background: #fff;
    border: 1px solid #e5e5e5;
    border-radius: 8px;
    color: #0a0a0a;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
}
.link-btn:hover {
    background: #0a0a0a;
    color: #fff;
    border-color: #0a0a0a;
    transform: translateY(-2px);
}
/* ===== 产品信息卡片 ===== */
.product-card {
    animation-delay: 0.1s;
}
.product-info {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 12px;
    border-bottom: 1px solid #f0f0f0;
}
.info-item:last-child {
    padding-bottom: 0;
    border-bottom: none;
}
.info-label {
    font-size: 14px;
    color: #666;
    font-weight: 500;
}
.info-value {
    font-size: 14px;
    font-weight: 600;
    color: #0a0a0a;
}
/* ===== 功能介绍卡片 ===== */
.features-card {
    animation-delay: 0.15s;
}
.features-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.features-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    color: #0a0a0a;
    transition: all 0.2s;
}
.features-list li:hover {
    transform: translateX(4px);
}
.features-list li i {
    color: #16a34a;
    font-size: 16px;
    flex-shrink: 0;
}
/* ===== 版权信息 ===== */
.copyright {
    text-align: center;
    margin-top: 32px;
    color: #999;
    font-size: 13px;
    animation: fadeInUp 0.6s ease 0.2s both;
}
.copyright-small {
    font-size: 11px;
    margin-top: 4px;
}
/* ===== 动画关键帧 ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
/* ===== 响应式适配 ===== */
@media (max-width: 480px) {
    .about-content {
        padding: 16px 12px 32px;
    }
    .card {
        padding: 20px;
    }
    .avatar-wrapper {
        width: 100px;
        height: 100px;
    }
    .developer-name {
        font-size: 20px;
    }
    .developer-links {
        flex-direction: column;
        gap: 8px;
    }
    .link-btn {
        justify-content: center;
    }
    .info-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }
}