/* =========================================
   About 页面样式 (过往荣誉 · 分类展示)
   依赖 index.css 的 .container / .hero /
   .floating-buttons 与 body.dark-mode 机制
   ========================================= */

/* --- 主题变量 (深色为默认) --- */
body {
    --ab-surface: #27272A;            /* 卡片表面 */
    --ab-surface-2: #1F1F22;          /* 次级表面 */
    --ab-border: #3F3F46;             /* 边框 */
    --ab-text: #F9FAFB;               /* 主文字 */
    --ab-text-2: #A0A0A0;             /* 次级文字 */
    --ab-accent: #34D399;             /* 站点强调色 (深色=绿) */
    --ab-accent-2: #22D3EE;
    --ab-gold: #F59E0B;               /* 冠军金 */
    --ab-bronze: #C08A4E;             /* 季军铜 */
    --ab-bg-glow: rgba(52, 211, 153, 0.08);
}

/* 浅色模式 */
body:not(.dark-mode) {
    --ab-surface: #FFFFFF;
    --ab-surface-2: #F3F4F6;
    --ab-border: #E5E7EB;
    --ab-text: #111827;
    --ab-text-2: #6B7280;
    --ab-accent: #4338CA;             /* 站点强调色 (浅色=靛蓝) */
    --ab-accent-2: #6366F1;
    --ab-bg-glow: rgba(99, 102, 241, 0.07);
}

/* =========================================
   1. 版块头
   ========================================= */
.honor-section {
    margin-bottom: 5rem;
}

.section-head {
    margin-bottom: 2.5rem;
}

.section-eyebrow {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--ab-accent);
    border: 1px solid color-mix(in srgb, var(--ab-accent) 35%, transparent);
    border-radius: 999px;
    padding: 0.3rem 0.9rem;
    margin-bottom: 0.9rem;
}

.section-head h2 {
    font-size: 1.9rem;
    font-weight: 800;
    color: var(--ab-text);
    letter-spacing: 0.02em;
}

.section-head .section-sub {
    margin-top: 0.4rem;
    font-size: 0.95rem;
    color: var(--ab-text-2);
}

/* =========================================
   2. 比赛成绩时间线
   ========================================= */
.timeline {
    position: relative;
}

/* 年份分组: 桌面端三列网格 (年份列 | 竖线列 | 卡片列) */
.tl-year-group {
    position: relative; /* 竖线/节点的定位锚点 */
    display: grid;
    grid-template-columns: 5.5rem 1.2rem 1fr;
    column-gap: 1rem;
    padding-bottom: 2.5rem;
}

.tl-year-group:last-child {
    padding-bottom: 0;
}

/* 年份标签列 */
.tl-year {
    grid-column: 1;
    grid-row: 1;
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-align: right;
    color: var(--ab-text);
    padding-top: 0.6rem;
}

.tl-year small {
    display: block;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.3em;
    color: var(--ab-text-2);
    margin-top: 0.1rem;
}

/* 竖线: 作为第 2 列 grid 项纵向铺满 */
.tl-year-group::before {
    content: '';
    grid-column: 2;
    grid-row: 1;
    width: 2px;
    justify-self: center;
    background: linear-gradient(to bottom, var(--ab-border) 0%, var(--ab-border) 90%, transparent 100%);
}

/* 连接点: 同样放在第 2 列，覆盖在竖线顶端 */
.tl-node {
    grid-column: 2;
    grid-row: 1;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--ab-accent);
    border: 3px solid var(--ab-surface);
    box-shadow: 0 0 0 3px var(--ab-border), 0 0 12px color-mix(in srgb, var(--ab-accent) 50%, transparent);
    justify-self: center;
    align-self: start;
    margin-top: 0.75rem;
    z-index: 1;
}

/* 卡片列 */
.tl-entries {
    grid-column: 3;
    grid-row: 1;
    display: flex;
    flex-direction: column;
    gap: 1.1rem;
    min-width: 0;
}

/* 链接包裹整卡时占满列宽 */
.tl-entries > a {
    display: block;
}

/* 时间线条目卡片 */
.tl-entry {
    position: relative;
    background: var(--ab-surface);
    border: 1px solid var(--ab-border);
    border-radius: 14px;
    padding: 1.4rem 1.6rem;
    margin-bottom: 1.1rem;
    display: flex;
    align-items: center;
    gap: 1.1rem;
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

/* 非主打卡片裁切圆角内的背景图，内容置于其上 */
.tl-entry:not(.featured) {
    overflow: hidden;
}

.tl-entry:not(.featured) > :not(.entry-bg) {
    position: relative;
    z-index: 1;
}

/* 常规条目背景图 (右侧淡出) */
.tl-entry .entry-bg {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 45%;
    background-size: cover;
    background-position: center right;
    opacity: 0.14;
    pointer-events: none;
    -webkit-mask-image: linear-gradient(to left, rgba(0,0,0,1) 10%, rgba(0,0,0,0) 100%);
    mask-image: linear-gradient(to left, rgba(0,0,0,1) 10%, rgba(0,0,0,0) 100%);
}

.tl-entry:hover .entry-bg {
    opacity: 0.2;
}

.tl-year-group:last-child .tl-entry:last-child {
    margin-bottom: 0;
}

.tl-entry:hover {
    transform: translateY(-3px);
    box-shadow: 0 14px 28px -12px rgba(0, 0, 0, 0.35);
    border-color: color-mix(in srgb, var(--ab-accent) 45%, var(--ab-border));
}

/* 名次徽章 */
.rank-chip {
    flex-shrink: 0;
    min-width: 76px;
    text-align: center;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    border-radius: 8px;
    padding: 0.45rem 0.6rem;
    color: #FFFFFF;
}

.rank-gold   { background: linear-gradient(135deg, #F59E0B, #D97706); box-shadow: 0 4px 14px -4px rgba(245, 158, 11, 0.55); }
.rank-bronze { background: linear-gradient(135deg, #D6A15F, #A96C2F); box-shadow: 0 4px 14px -4px rgba(192, 138, 78, 0.5); }
.rank-top4   { background: linear-gradient(135deg, #34D399, #0EA5E9); box-shadow: 0 4px 14px -4px rgba(52, 211, 153, 0.5); }
.rank-top8   { background: linear-gradient(135deg, #8B5CF6, #6366F1); box-shadow: 0 4px 14px -4px rgba(139, 92, 246, 0.5); }

/* 条目文字 */
.tl-entry-body {
    flex: 1;
    min-width: 0;
}

.tl-entry-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--ab-text);
    margin-bottom: 0.25rem;
}

.tl-entry-desc {
    font-size: 0.9rem;
    color: var(--ab-text-2);
    line-height: 1.55;
}

/* 查看捷报 提示 */
.tl-link-hint {
    flex-shrink: 0;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--ab-accent);
    display: flex;
    align-items: center;
    gap: 0.3rem;
    white-space: nowrap;
}

.tl-link-hint .arrow {
    transition: transform 0.25s ease;
}

.tl-entry:hover .tl-link-hint .arrow {
    transform: translateX(4px);
}

/* --- 主打卡片: 2026 殿军 --- */
.tl-entry.featured {
    position: relative;
    padding: 1.7rem 1.8rem;
    border: 1px solid transparent;
    background:
        linear-gradient(var(--ab-surface), var(--ab-surface)) padding-box,
        linear-gradient(120deg, #34D399, #22D3EE, #818CF8) border-box;
    box-shadow: 0 18px 44px -16px color-mix(in srgb, var(--ab-accent) 45%, transparent);
}

/* 背景图片装饰 (26gs.jpeg) */
.tl-entry.featured .featured-bg {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 45%;
    background-size: cover;
    background-position: center;
    opacity: 0.16;
    pointer-events: none;
    -webkit-mask-image: linear-gradient(to left, rgba(0,0,0,1) 10%, rgba(0,0,0,0) 100%);
    mask-image: linear-gradient(to left, rgba(0,0,0,1) 10%, rgba(0,0,0,0) 100%);
}

.tl-entry.featured > *:not(.featured-bg):not(.new-flag) {
    position: relative;
    z-index: 1;
}

.tl-entry.featured .rank-chip {
    font-size: 0.95rem;
    min-width: 88px;
    padding: 0.55rem 0.7rem;
}

.tl-entry.featured .tl-entry-title {
    font-size: 1.25rem;
    background: linear-gradient(90deg, var(--ab-text), color-mix(in srgb, var(--ab-text) 55%, var(--ab-accent)));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* "最新战绩" 角标 */
.new-flag {
    position: absolute !important;
    top: -0.7rem !important;
    left: 1.4rem;
    z-index: 2;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    color: #18181B;
    background: linear-gradient(90deg, #34D399, #22D3EE);
    border-radius: 999px;
    padding: 0.28rem 0.75rem;
    box-shadow: 0 6px 16px -4px rgba(52, 211, 153, 0.6);
}

/* 主打卡片整卡可点 */
.tl-entry.featured a {
    position: absolute;
    inset: 0;
    z-index: 2;
    border-radius: 13px;
}

.tl-entry.featured a:focus-visible {
    outline: 2px solid var(--ab-accent);
    outline-offset: 2px;
}

/* 2026 组: 年份压窄 */
.tl-year-group.latest .tl-year {
    color: var(--ab-accent);
}

/* =========================================
   3. 开源获奖 卡片展架
   ========================================= */
.os-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.os-card {
    background: var(--ab-surface);
    border: 1px solid var(--ab-border);
    border-radius: 14px;
    padding: 1.6rem;
    display: flex;
    flex-direction: column;
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.os-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 32px -14px rgba(0, 0, 0, 0.35);
    border-color: color-mix(in srgb, var(--ab-accent) 45%, var(--ab-border));
}

.os-card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.9rem;
}

.os-icon {
    font-size: 1.5rem;
    width: 46px;
    height: 46px;
    display: grid;
    place-items: center;
    background: var(--ab-surface-2);
    border: 1px solid var(--ab-border);
    border-radius: 10px;
}

.os-year-tag {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--ab-accent);
    border: 1px solid color-mix(in srgb, var(--ab-accent) 35%, transparent);
    border-radius: 999px;
    padding: 0.25rem 0.7rem;
}

.os-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--ab-text);
    margin-bottom: 0.5rem;
}

.os-card p {
    font-size: 0.9rem;
    color: var(--ab-text-2);
    line-height: 1.6;
    flex: 1;
    margin-bottom: 1.1rem;
}

.os-card .os-link {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--ab-accent);
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    width: fit-content;
}

.os-card .os-link .arrow {
    transition: transform 0.25s ease;
}

.os-card:hover .os-link .arrow {
    transform: translateX(4px);
}

/* 敬请期待 占位卡 */
.os-card.placeholder {
    opacity: 0.55;
    border-style: dashed;
    align-items: center;
    justify-content: center;
    text-align: center;
    min-height: 200px;
    cursor: default;
}

.os-card.placeholder:hover {
    transform: none;
    box-shadow: none;
    border-color: var(--ab-border);
}

.os-card.placeholder .os-icon {
    margin-bottom: 0.8rem;
}

.os-card.placeholder h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--ab-text-2);
    margin-bottom: 0.2rem;
}

.os-card.placeholder p {
    font-size: 0.82rem;
    margin-bottom: 0;
    flex: none;
}

/* =========================================
   4. RM Award 聚光卡
   ========================================= */
.award-card {
    display: flex;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--ab-border);
    background: var(--ab-surface);
    min-height: 300px;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.award-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px -18px rgba(0, 0, 0, 0.4);
}

.award-photo {
    flex: 0 0 42%;
    background-size: cover;
    background-position: center 30%;
    position: relative;
}

/* 照片右缘渐隐，融入卡片 */
.award-photo::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, transparent 55%, var(--ab-surface) 100%);
}

.award-body {
    flex: 1;
    padding: 2.4rem 2.6rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 0.8rem;
}

.award-badge {
    width: fit-content;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    color: #18181B;
    background: linear-gradient(90deg, #FDE68A, #F59E0B);
    border-radius: 999px;
    padding: 0.32rem 0.85rem;
    box-shadow: 0 6px 18px -6px rgba(245, 158, 11, 0.6);
}

.award-body h3 {
    font-size: 1.7rem;
    font-weight: 800;
    color: var(--ab-text);
}

.award-quote {
    font-size: 1.02rem;
    color: var(--ab-text-2);
    font-style: italic;
}

/* =========================================
   5. 动效降级
   ========================================= */
@media (prefers-reduced-motion: reduce) {
    .tl-entry,
    .os-card,
    .award-card {
        transition: none;
    }
    .tl-entry:hover .tl-link-hint .arrow,
    .os-card:hover .os-link .arrow {
        transform: none;
    }
}

/* =========================================
   6. 响应式
   ========================================= */
@media (max-width: 768px) {
    /* 时间线: 年份回到流内、竖线/节点绝对定位靠左 */
    .tl-year-group {
        display: block;
        padding-left: 1.6rem;
    }

    .tl-year-group::before {
        position: absolute;
        left: 0.3rem;
        top: 0.45rem;
        bottom: 0;
        width: 2px;
    }

    .tl-node {
        position: absolute;
        left: 0.3rem;
        top: 0.45rem;
        margin-top: 0;
        transform: translateX(-50%);
    }

    .tl-year {
        position: static;
        width: auto;
        text-align: left;
        font-size: 1.25rem;
        padding-top: 0;
        margin-bottom: 0.6rem;
    }

    .tl-entries {
        gap: 0.9rem;
    }

    .tl-entry {
        flex-wrap: wrap;
        gap: 0.7rem;
        padding: 1.2rem 1.25rem;
    }

    .tl-entry.featured {
        padding: 1.5rem 1.3rem;
    }

    .tl-entry.featured .featured-bg {
        width: 60%;
        opacity: 0.12;
    }

    .tl-entry .entry-bg {
        width: 55%;
        opacity: 0.11;
    }

    .tl-link-hint {
        width: 100%;
        justify-content: flex-end;
    }

    .new-flag {
        left: 1.1rem !important;
    }

    /* RM Award: 上下堆叠 */
    .award-card {
        flex-direction: column;
    }

    .award-photo {
        flex: none;
        height: 220px;
    }

    .award-photo::after {
        background: linear-gradient(to bottom, transparent 55%, var(--ab-surface) 100%);
    }

    .award-body {
        padding: 1.6rem 1.5rem 2rem;
    }

    .section-head h2 {
        font-size: 1.55rem;
    }
}