/* 基础布局 */
.layout {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--background-color);
}

/* 头部样式 */
.header {
    position: sticky;
    top: 0;
    background: var(--background-light);
    height: var(--header-height);
    box-shadow: 0 2px 8px var(--shadow-color);
    z-index: 100;
    display: flex;
    align-items: center;
}

.header > div {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--content-padding);
    display: flex;
    align-items: center;
    gap: 2rem;
    width: 100%;
}

.header h1 {
    margin: 0;
    line-height: 0;
}

.header img {
    display: block;
    filter: drop-shadow(0 2px 4px var(--shadow-color));
}

/* 导航样式 */
.nav {
    display: flex;
    gap: 0.5rem;
}

.nav a {
    padding: 0.5rem 1rem;
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    border-radius: var(--border-radius);
    transition: all var(--transition-speed) ease;
    position: relative;
}

.nav a::after {
    content: "";
    position: absolute;
    bottom: 2px;
    left: 1rem;
    width: calc(100% - 2rem);
    height: 2px;
    background: var(--primary-color);
    transform: scaleX(0);
    transition: transform var(--transition-speed) ease;
    transform-origin: center;
    opacity: 0.6;
}

.nav a:hover {
    color: var(--text-dark);
}

.nav a:hover::after {
    transform: scaleX(0.6);
}

.nav a.active {
    color: var(--primary-color);
    font-weight: 600;
}

.nav a.active::after {
    transform: scaleX(1);
    opacity: 1;
}

/* 主内容区域 */
.main {
    flex: 1;
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--content-padding);
}

/* 区块样式 */
section {
    margin-bottom: var(--content-padding);
}

section:last-child {
    margin-bottom: 0;
}

section h2 {
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.content-area {
    background: var(--background-light);
    padding: var(--content-padding);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px var(--shadow-color);
}

/* 计数器样式 */
.counter {
    background: var(--background-light);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 20px var(--shadow-color);
    text-align: center;
}

.counter-value {
    font-size: 5rem;
    font-weight: bold;
    background: linear-gradient(
        135deg,
        var(--primary-color),
        var(--primary-dark)
    );
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* URL展示样式 */
.url-section {
    background: var(--background-light);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 20px var(--shadow-color);
}

.url-section pre {
    margin: 0;
    padding: 1rem;
    background: var(--background-dark);
    border-radius: 8px;
    overflow-x: auto;
    color: var(--text-dark);
}

/* 图片网格样式 */
.image-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

@media (max-width: 1024px) {
    .image-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .image-grid {
        grid-template-columns: 1fr;
    }
}

.image-grid li {
    background: var(--background-light);
    border-radius: 12px;
    box-shadow: 0 4px 20px var(--shadow-color);
    overflow: hidden;
    transition: transform 0.3s ease;
}

.image-grid li:hover {
    transform: translateY(-5px);
}

.image-grid img {
    width: 100%;
    height: 200px;
    object-fit: contain;
    margin-bottom: 1rem;
}

.image-info {
    padding: 1rem;
}

.image-info h3 {
    margin: 0 0 0.5rem;
    color: var(--text-dark);
    font-size: 1.1rem;
}

.image-info p {
    margin: 0.25rem 0;
    color: var(--text-light);
    font-size: 0.9rem;
}

/* 关于页面样式 */
.about-page {
    padding: 2rem 0;
}

.about-hero {
    text-align: center;
    margin-bottom: 4rem;
    padding: 3rem 0;
    background: linear-gradient(
        135deg,
        var(--background-light) 0%,
        var(--background-dark) 100%
    );
    border-radius: 16px;
}

.about-hero h2 {
    font-size: 2.5rem;
    color: var(--text-dark);
    margin: 0 0 1rem;
}

.about-hero p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin: 0;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-bottom: 4rem;
}

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

.feature-card {
    background: var(--background-light);
    border-radius: 16px;
    padding: 2rem;
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    box-shadow: 0 4px 20px var(--shadow-color);
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px var(--shadow-color-hover);
    border-color: var(--primary-light);
}

.feature-card .icon {
    font-size: 2rem;
    background: var(--background-dark);
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    flex-shrink: 0;
}

.feature-card .content {
    flex: 1;
}

.feature-card h3 {
    margin: 0 0 0.5rem;
    color: var(--text-dark);
    font-size: 1.3rem;
}

.feature-card p {
    margin: 0;
    color: var(--text-light);
    line-height: 1.6;
}

.about-footer {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.update-section {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.update-info {
    text-align: right;
    color: var(--text-light);
    font-size: 0.875rem;
}