/* ==================== CSS Variables ==================== */
:root {
    --primary: #0a7ec2;
    --primary-dark: #085e91;
    --primary-light: #e6f4fb;
    --accent: #00a8e8;
    --text: #333;
    --text-light: #666;
    --bg-gray: #f5f7fa;
    --white: #fff;
    --transition: all 0.3s ease;
}

/* ==================== Reset / Base ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
    overflow-x: clip;
    max-width: 100%;
}
body {
    font-family:
        "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    color: var(--text);
    background: var(--white);
    line-height: 1.6;
    width: 100%;
    max-width: 100%;
    overflow-x: clip;
    position: relative;
}
a {
    text-decoration: none;
    color: inherit;
}
ul {
    list-style: none;
}
img {
    max-width: 100%;
    display: block;
}
.rich-content table {
    width: 100%;
    max-width: 100%;
    margin: 16px 0;
    border-collapse: collapse;
    border-spacing: 0;
}
.rich-content table,
.rich-content th,
.rich-content td {
    border: 1px solid #d9e2ec;
}
.rich-content th,
.rich-content td {
    padding: 10px 12px;
    text-align: left;
    vertical-align: top;
}
.bilibili-embed {
    width: 100%;
    max-width: 960px;
    aspect-ratio: 16 / 9;
    margin: 16px auto;
}
.bilibili-embed iframe {
    display: block;
    width: 100%;
    height: 100%;
    border: 0;
}
.bilibili-mobile-link {
    display: none;
}
@media (max-width: 768px) {
    .rich-content table {
        width: 100% !important;
        table-layout: fixed;
    }
    .rich-content th,
    .rich-content td {
        width: auto !important;
        word-break: break-word;
    }
    .rich-content img {
        max-width: 100% !important;
        height: auto !important;
    }
    .rich-content video,
    .rich-content iframe {
        display: block;
        width: 100% !important;
        max-width: 100% !important;
        height: auto !important;
        margin: 16px auto;
        pointer-events: auto;
    }
    .rich-content video {
        object-fit: contain;
    }
    .rich-content iframe {
        aspect-ratio: 16 / 9;
        border: 0;
    }
    .bilibili-embed {
        max-width: 100%;
    }
    .bilibili-embed iframe {
        display: none;
    }
    .bilibili-mobile-link {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 100%;
        min-height: 52px;
        padding: 14px 20px;
        box-sizing: border-box;
        border-radius: 4px;
        background: #00aeec;
        color: #fff;
        text-align: center;
    }
}
.container {
    width: 1200px;
    max-width: 94%;
    margin: 0 auto;
}
.section-title {
    text-align: center;
    margin-bottom: 40px;
}
.section-title h2 {
    font-size: 32px;
    color: #1d78bd;
    font-weight: 700;
    letter-spacing: 8px;
    margin-bottom: 8px;
    word-break: break-word;
}
.section-title p {
    font-size: 12px;
    color: #999;
    letter-spacing: 4px;
    text-transform: uppercase;
}
/* 英文版区块标题只保留主标题，隐藏下方英文副标题 */
html[lang="en"] .section-title p {
    display: none;
}
.section-title::after {
    content: "";
    display: block;
    width: 78px;
    height: 4px;
    margin: 14px auto 0;
    background: url("../../images/title-sub.png") center / 78px 4px no-repeat;
}
.btn {
    display: inline-block;
    padding: 10px 28px;
    border-radius: 20px;
    font-size: 14px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}
.btn-primary {
    background: linear-gradient(90deg, var(--accent), var(--primary));
    color: var(--white);
    box-shadow: 0 4px 14px rgba(10, 126, 194, 0.35);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(10, 126, 194, 0.45);
}
.btn-outline {
    background: transparent;
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.6);
}
.btn-outline:hover {
    background: var(--white);
    color: var(--primary);
}

.fade-up,
body:not([data-nav="home"]) .page-breadcrumb > .container,
body:not([data-nav="home"]) .page-main .container > * {
    opacity: 0;
    transform: translateY(30px);
    transition:
        opacity 0.8s ease,
        transform 0.8s ease;
}
.fade-up.visible,
body:not([data-nav="home"]) .page-breadcrumb > .container.visible,
body:not([data-nav="home"]) .page-main .container > *.visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 480px) {
    .section-title h2 {
        font-size: 24px;
        letter-spacing: 2px;
    }
}