*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent !important;
    -webkit-touch-callout: none;
    /* user-select: none; */
}
:root {
    --primary-color: #ff1d55;
    --primary-gradient: linear-gradient(45deg, #ff1d56, #ff4444);
    --text-color: #333;
    --transition-speed: 0.3s;
}

html {
    font-size: 62.5%;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    color: var(--text-color);
    background: #fff;
}

.container {
    max-width: 120rem;
    margin: 0 auto;
}

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

a:hover {
    opacity: 0.8;
}

.update-text a {
    display: inline-block;
    padding: 0 1rem;
    border-radius: 2rem;
    margin: 0.5rem 1rem 0.5rem 0;
    font-size: 1.4rem;
    text-indent: 0;
    transition: background-color 0.3s ease-in-out;
}

.update-text a:hover {
    opacity: 0.9;
    background-color: #dedfdfa6;
}

.section-title {
    font-size: 3rem;
    color: var(--primary-color);
    text-align: center;
    font-weight: 600;
}

.timeline {
    position: relative;
    padding: 2rem 0;
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
}

.date {
    font-size: 2rem;
    color: var(--primary-color);
    display: block;
    position: relative;
    cursor: pointer;
    user-select: none;
    text-align: right;
    padding-right: 2rem;
    border-right: 2px solid var(--primary-color);
}

.date:hover {
    border-right-color: currentColor;
}

.timeline-content {
    overflow: hidden;
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    max-height: 2000px;
    opacity: 1;
    transform: translateY(0);
    margin-bottom: 2rem;
}

.timeline-content.hidden {
    max-height: 0;
    opacity: 0;
    transform: translateY(-20px);
    margin: 0;
}

.welcome-section,
.update-section {
    width: 100%;
    max-width: 100rem;
    margin: 0 auto;
}

.content-card {
    position: relative;
    background: rgba(255, 255, 255, 0.7);
    border-radius: 1.5rem;
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.18);
    margin-bottom: 1rem;
    transition: all 0.3s ease;
    overflow: hidden;
}

.content-card.hide {
    opacity: 0;
    transform: translateY(-20px);
}

.card-tag {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(0, 0, 0, 0.2);
    color: rgba(255, 255, 255, 0.85);
    padding: 0.2rem 0.8rem;
    border-radius: 2rem;
    font-size: 1.1rem;
    font-weight: 400;
    z-index: 2;
    backdrop-filter: blur(2px);
    cursor: pointer;
    transition: opacity 0.3s ease;
}

.card-tag:hover {
    opacity: 0.8;
}

/* .content-card:hover {
    transform: translateY(-5px);
} */

.card-title {
    font-size: 2.4rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.card-text,
.update-text {
    font-size:  1.8rem;
    color: var(--text-color);
    line-height: 3.6rem;
    text-indent: 2rem;
}

.t-right{
    text-align: right;
}

.update-title {
    font-size: 2.2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.card-content {
    flex: 1;
}

.card-image-wrapper {
    margin: 0 -1.6rem;
    overflow: hidden;
    border-radius: 0.8rem;
}

.card-image {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.3s ease;
}

.card-with-image:hover .card-image {
    transform: scale(1.05);
}

.toggle-all {
    cursor: pointer;
    user-select: none;
    transition: opacity 0.3s ease;
}

.toggle-all:hover {
    opacity: 0.8;
}

/* 专门处理点击状态 */
a, button, .date, .card-tag, .toggle-all {
    -webkit-tap-highlight-color: transparent !important;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    outline: none;
}

a:active, button:active, .date:active, .card-tag:active, .toggle-all:active {
    background-color: transparent !important;
}

/* 响应式设计 */
@media (max-width: 768px) {
    html {
        font-size: 56.25%;  /* 9px */
    }

    .container {
        padding: 1.5rem;
    }

    .content-card {
        padding: 2rem;
        margin-bottom: 1rem;
    }

    .card-with-qr {
        flex-direction: column;
        gap: 2rem;
    }


    .links-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .update-text {
        font-size: 1.4rem;
        line-height: 1.6;
    }

    .update-text a {
        display: inline-block;
        margin: 0.5rem 1rem 0.5rem 0;
    }

    .card-title {
        font-size: 2rem;
        margin-bottom: 1.2rem;
    }

    .section-title {
        font-size: 2.4rem;
        margin-bottom: 1.5rem;
    }

    .card-image-wrapper {
        margin: 1.5rem -2rem;
    }

    .timeline-item {
        margin-bottom: 2rem;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 50%;  /* 8px */
    }

    .container {
        padding: 1rem;
    }

    .content-card {
        padding: 1rem;
    }

    .update-text {
        font-size: 1.4rem;
    }

    .update-text a {
        margin: 0.5rem 0.8rem 0.5rem 0;
        padding: 0.5rem 1.2rem;
    }

    .card-tag {
        font-size: 1rem;
        padding: 0.2rem 0.6rem;
    }
}