/* --- 关于大赛独立页 --- */
.about-page {
    min-height: calc(100vh - 84px - 280px);
    padding-bottom: 80px;
}

.about-page .page-hero {
    position: relative;
    overflow: hidden;
    margin-bottom: 0;
    padding: 48px 0 44px;
    color: #fff;
}

.about-page .page-intro {
    position: relative;
    z-index: 1;
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 28px;
}

.about-page .page-intro .sec-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: #c084fc;
    margin-bottom: 0.75rem;
}

.about-page .page-intro h1 {
    font-family: var(--font-sans, -apple-system, BlinkMacSystemFont, "PingFang SC", sans-serif);
    font-size: clamp(1.9rem, 3vw, 2.45rem);
    color: #fff;
    letter-spacing: 0.02em;
    line-height: 1.25;
}

.about-page .page-intro h1::after {
    content: "";
    display: block;
    width: 56px;
    height: 3px;
    background: #c084fc;
    margin-top: 1rem;
    border-radius: 2px;
}

.about-page .page-intro p {
    color: rgba(255, 255, 255, 0.82);
    font-size: 1.02rem;
    margin-top: 1rem;
    max-width: 640px;
    line-height: 1.7;
}

.about-body {
    max-width: 1140px;
    margin: 0 auto;
    padding: 40px 28px 0;
}

.about-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 36px;
    padding: 16px 18px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 0 2rem 0 rgba(136, 152, 170, 0.12);
}

.about-nav a {
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 0.875rem;
    font-weight: 600;
    color: #581c87;
    background: #f3e8ff;
    text-decoration: none;
    transition: background .2s, color .2s;
}

.about-nav a:hover {
    background: #581c87;
    color: #fff;
}

.about-section {
    background: #fff;
    border-radius: 12px;
    padding: 32px 36px;
    margin-bottom: 24px;
    box-shadow: 0 0 2rem 0 rgba(136, 152, 170, 0.1);
}

.about-section h2 {
    font-family: var(--font-sans, -apple-system, BlinkMacSystemFont, "PingFang SC", sans-serif);
    font-size: 1.45rem;
    font-weight: 700;
    color: #1e1b4b;
    margin: 0 0 6px;
    letter-spacing: 0.02em;
}

.about-section .sec-en {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: #7c3aed;
    margin-bottom: 20px;
}

.about-section h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: #312e81;
    margin: 24px 0 10px;
}

.about-section h3:first-of-type { margin-top: 0; }

.about-section p,
.about-section li {
    color: #525f7f;
    font-size: 0.98rem;
    line-height: 1.8;
}

.about-section p { margin: 0 0 14px; }

.about-section ul {
    margin: 0 0 14px;
    padding-left: 1.25rem;
}

.about-section li { margin-bottom: 6px; }

.about-grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 16px;
}

.about-card {
    padding: 18px 20px;
    border-radius: 10px;
    background: #f9f8fc;
    border: 1px solid rgba(88, 28, 135, 0.08);
}

.about-card h3 {
    margin-top: 0;
    font-size: 1rem;
}

.about-card p { margin-bottom: 0; font-size: 0.92rem; }

/* 赛程时间轴 */
.timeline-list {
    display: grid;
    gap: 16px;
    margin-top: 8px;
}

.timeline-item {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 20px;
    padding: 20px 22px;
    border-radius: 10px;
    background: #f9f8fc;
    border-left: 4px solid #7c3aed;
}

.timeline-item .tl-label {
    font-weight: 700;
    color: #581c87;
    font-size: 0.95rem;
    line-height: 1.4;
}

.timeline-item .tl-dates {
    font-size: 0.88rem;
    font-weight: 700;
    color: #7c3aed;
    margin-bottom: 8px;
}

.timeline-item p {
    margin: 0;
    font-size: 0.92rem;
}

/* 奖项 */
.prize-highlight {
    margin: 16px 0;
    padding: 18px 22px;
    border-radius: 10px;
    background: linear-gradient(135deg, #f3e8ff 0%, #ede9fe 100%);
    border: 1px solid rgba(124, 58, 237, 0.15);
}

.prize-highlight p {
    margin: 0;
    font-weight: 600;
    color: #312e81;
    font-size: 0.98rem;
}

/* 组织机构 */
.org-list {
    display: grid;
    gap: 14px;
}

.org-item {
    padding: 16px 20px;
    border-radius: 10px;
    background: #f9f8fc;
}

.org-item h3 { margin: 0 0 8px; font-size: 1rem; }
.org-item p { margin: 0; font-size: 0.92rem; }

/* 评分表 */
.rubric-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 12px;
    font-size: 0.92rem;
}

.rubric-table th {
    background: #312e81;
    color: #fff;
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
}

.rubric-table td {
    padding: 12px 16px;
    border-bottom: 1px solid rgba(49, 46, 129, 0.08);
    color: #525f7f;
    vertical-align: top;
}

.rubric-table tr:last-child td { border-bottom: none; }

.rubric-table .score {
    font-weight: 700;
    color: #7c3aed;
    white-space: nowrap;
}

/* 加拿大认可 */
.endorse-block {
    margin-top: 8px;
}

.endorse-intro {
    margin-bottom: 20px;
}

.endorse-leaders {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.endorse-card {
    padding: 20px;
    border-radius: 10px;
    background: #f9f8fc;
    text-align: center;
    border: 1px solid rgba(88, 28, 135, 0.08);
}

.endorse-card strong {
    display: block;
    font-size: 0.88rem;
    color: #64748b;
    margin-bottom: 6px;
}

.endorse-card span {
    font-size: 0.95rem;
    font-weight: 700;
    color: #1e1b4b;
}

@media (max-width: 900px) {
    .about-grid-2,
    .endorse-leaders { grid-template-columns: 1fr; }
    .timeline-item { grid-template-columns: 1fr; gap: 8px; }
    .about-section { padding: 24px 20px; }
}

@media (max-width: 768px) {
    .about-body {
        padding: 24px 16px 0;
    }
    .about-nav {
        gap: 8px;
        margin-bottom: 22px;
        padding: 12px;
        border-radius: 12px;
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }
    .about-nav::-webkit-scrollbar { display: none; }
    .about-nav a {
        flex: 0 0 auto;
        padding: 7px 12px;
        font-size: 0.8rem;
        white-space: nowrap;
    }
    .about-section {
        padding: 20px 16px;
        margin-bottom: 16px;
        border-radius: 12px;
    }
    .about-section h2 {
        font-size: 1.25rem;
    }
    .about-section h3 {
        font-size: 1rem;
    }
    .about-section p,
    .about-section li {
        font-size: 0.94rem;
        line-height: 1.75;
    }
    .about-page .page-intro {
        padding: 0 16px;
    }
    .about-page .page-intro h1 {
        font-size: clamp(1.6rem, 7vw, 2rem);
    }
    .about-page .page-intro p {
        font-size: 0.95rem;
    }
    .rubric-table {
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        font-size: 0.86rem;
    }
    .rubric-table th,
    .rubric-table td {
        padding: 10px 12px;
        white-space: normal;
    }
}