body {
    padding: 20px;
    background-color: #f5f5f5;
    overflow-y: scroll;
    margin: 0;
    display: flex;
    flex-direction: column;
    min-height: calc(100vh - 40px);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
}
a {
    text-decoration: none;
}

/* 返回主页按钮 */
.back-home {
    position: fixed;
    top: 20px;
    left: 20px;
    padding: 10px 18px;
    background: linear-gradient(135deg, #1a1a40, #3a0ca3);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    z-index: 1000;
}
.back-home:hover {
    background: linear-gradient(135deg, #2a2a60, #5a1cd3);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

/* 标题 */
h1 {
    text-align: center;
    margin: 0 0 16px;
    font-size: 2.2rem;
    background: linear-gradient(90deg, #6a11cb, #3a0ca3);
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
}

.intro {
    max-width: 720px;
    margin: 0 auto 28px;
    text-align: center;
    color: #555;
    font-size: 15px;
    line-height: 1.9;
    padding: 0 16px;
    box-sizing: border-box;
}
.intro b {
    color: #3a0ca3;
}

/* 分区 */
.section {
    margin-bottom: 32px;
    padding: 0 20px;
    box-sizing: border-box;
}
.section-title {
    max-width: 1200px;
    margin: 0 auto 16px;
    font-size: 20px;
    font-weight: 600;
    text-align: center;
    box-sizing: border-box;
}
.section-title.channel  { color: #e0508a; }
.section-title.cost     { color: #e67e22; }
.section-title.about    { color: #3a0ca3; }

/* ──── 赞助二维码 ──── */
.qr-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    max-width: 1000px;
    margin: 0 auto;
}
.qr-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    width: 300px;
    padding: 18px 16px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(58, 12, 163, 0.12);
    border-top: 4px solid #3a0ca3;
    transition: all 0.3s ease;
    box-sizing: border-box;
}
.qr-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 28px rgba(58, 12, 163, 0.22);
}
.qr-card.afdian { border-top-color: #946ce6; }
.qr-card.wechat { border-top-color: #2aae67; }
.qr-card.alipay { border-top-color: #1677ff; }

.qr-name {
    font-size: 17px;
    font-weight: 700;
    color: #1a1a40;
}
/* 三张收款码素材都是竖版手机截图(约 3:4),容器按竖版留位 */
.qr-card img {
    width: 100%;
    aspect-ratio: 3 / 4;
    height: auto;
    object-fit: contain;
    border-radius: 8px;
    background: #fafafa;
    padding: 4px;
    box-sizing: border-box;
}
.qr-tip {
    font-size: 13px;
    color: #888;
}
.qr-link {
    font-size: 13px;
    font-weight: 600;
    color: #946ce6;
    transition: color 0.2s ease;
}
.qr-link:hover {
    color: #6a11cb;
}

/* 横滑提示 —— 仅移动端(轨道模式)显示,桌面端换行布局下隐藏 */
.swipe-hint {
    display: none;
    margin: 12px 0 0;
    text-align: center;
    color: #aaa;
    font-size: 12.5px;
    letter-spacing: 0.5px;
}

.note-line {
    max-width: 720px;
    margin: 20px auto 0;
    text-align: center;
    color: #777;
    font-size: 13px;
    line-height: 1.8;
}
.note-line b {
    color: #e0508a;
}

/* ──── 开销去向 ──── */
.cost-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
    max-width: 1100px;
    margin: 0 auto;
}
.cost-card {
    width: 320px;
    padding: 18px 20px;
    background: linear-gradient(135deg, #1a1a40, #3a0ca3);
    color: #fff;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(58, 12, 163, 0.35);
    transition: all 0.3s ease;
    box-sizing: border-box;
}
.cost-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(90, 120, 255, 0.5);
}
.cost-icon {
    font-size: 26px;
    line-height: 1;
    margin-bottom: 8px;
}
.cost-title {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
}
.cost-desc {
    font-size: 13.5px;
    line-height: 1.8;
    opacity: 0.92;
}

/* ──── 我在做什么 ──── */
.about-card {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 32px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(58, 12, 163, 0.12);
    box-sizing: border-box;
}
.about-card p {
    margin: 0 0 14px;
    color: #444;
    font-size: 14.5px;
    line-height: 1.9;
}
.about-card p:last-of-type {
    margin-bottom: 0;
}
.about-card b {
    color: #3a0ca3;
}
.about-card a {
    color: #2575fc;
}
.about-card a:hover {
    text-decoration: underline;
}
.about-card .upstream {
    margin-top: 16px;
    padding: 12px 14px;
    background: #fff8e6;
    border-left: 4px solid #e67e22;
    border-radius: 6px;
    font-size: 13.5px;
    color: #6b5330;
}
.about-card .upstream b {
    color: #b35c00;
}

.link-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px;
    margin-top: 24px;
}

.about-card .mini-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 700;
    color: #fff;
    text-decoration: none;
    transition: all 0.25s ease;
}
.about-card .mini-btn:hover {
    transform: translateY(-2px);
    text-decoration: none;
    filter: brightness(1.08);
}
/* 适配层仓库 */
.about-card .mini-btn.repo {
    background: linear-gradient(145deg, #24292f, #3a4149);
    box-shadow: 0 4px 14px rgba(36, 41, 47, 0.35);
}
.about-card .mini-btn.repo:hover {
    box-shadow: 0 6px 20px rgba(36, 41, 47, 0.45);
}
/* LGTBot 上游 */
.about-card .mini-btn.upstream-btn {
    background: linear-gradient(135deg, #3a0ca3, #6a11cb);
    box-shadow: 0 4px 14px rgba(58, 12, 163, 0.4);
}
.about-card .mini-btn.upstream-btn:hover {
    box-shadow: 0 6px 20px rgba(106, 17, 203, 0.5);
}
/* 邀请机器人 */
.about-card .mini-btn.robot {
    background: linear-gradient(135deg, #0e9f6e, #22c55e);
    box-shadow: 0 4px 14px rgba(34, 197, 94, 0.38);
}
.about-card .mini-btn.robot:hover {
    box-shadow: 0 6px 20px rgba(34, 197, 94, 0.5);
}
/* 官方群聊 */
.about-card .mini-btn.group {
    background: linear-gradient(135deg, #0a8fd8, #12b7f5);
    box-shadow: 0 4px 14px rgba(18, 183, 245, 0.38);
}
.about-card .mini-btn.group:hover {
    box-shadow: 0 6px 20px rgba(18, 183, 245, 0.5);
}
/* GitHub 图标 */
.mini-icon {
    width: 18px;
    height: 18px;
    filter: brightness(0) invert(1);
    flex-shrink: 0;
}
.qq-num {
    font-size: 12px;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.22);
    letter-spacing: 0.3px;
}

/* 结尾致谢 */
.thanks {
    margin: auto 0 0;
    padding: 16px 0 28px;
    text-align: center;
    color: #3a0ca3;
    font-size: 16px;
    font-weight: 600;
}

/* ICP 备案 */
#site-footer {
    font-size: 13px;
    text-align: center;
    color: #888;
    padding: 30px 0 8px;
}
#site-footer a {
    color: inherit;
    text-decoration: none;
}
#site-footer img {
    width: 15px;
    height: 15px;
    transform: translateY(1px);
}

/* ──── 响应式 ──── */
@media (max-width: 768px) {
    body {
        padding: 5px;
        min-height: calc(100vh - 10px);
    }
    .back-home {
        top: 6px;
        left: 6px;
        padding: 6px 12px;
        font-size: 14px;
    }
    h1 {
        font-size: 1.8rem;
        margin-top: 46px;
    }
    .intro {
        font-size: 14px;
        margin-bottom: 22px;
    }
    .section {
        padding: 0 10px;
        margin-bottom: 24px;
    }
    .section-title {
        font-size: 18px;
    }
    /* ── 二维码改为横向滑动轨道 */
    .qr-grid {
        flex-wrap: nowrap;
        justify-content: flex-start;
        max-width: 100%;
        gap: 12px;
        overflow-x: auto;
        overflow-y: hidden;
        scroll-snap-type: x mandatory;
        scroll-behavior: smooth;
        -webkit-overflow-scrolling: touch;
        padding: 4px calc((100% - 68vw) / 2);   /* 首尾卡片也能滚到正中 */
        scrollbar-width: none;
    }
    .qr-grid::-webkit-scrollbar {
        display: none;
    }
    .qr-card {
        flex: 0 0 auto;
        width: 68vw;
        max-width: 300px;
        padding: 14px 12px;
        scroll-snap-align: center;
    }
    .qr-card img {
        width: 100%;
        max-width: none;
        height: auto;
    }
    .swipe-hint {
        display: block;
    }
    .cost-card {
        width: 100%;
        max-width: 420px;
    }
    .about-card {
        padding: 18px 16px;
    }
    .about-card p {
        font-size: 14px;
    }
}
@media (max-width: 480px) {
    .section {
        padding: 0 5px;
    }
    /* 小屏进一步缩小卡片(二维码随卡片等比变小) */
    .qr-grid {
        padding: 4px calc((100% - 72vw) / 2);
        gap: 10px;
    }
    .qr-card {
        width: 72vw;
        max-width: 270px;
        padding: 12px 10px;
        gap: 8px;
    }
    .qr-name {
        font-size: 16px;
    }
    .qr-tip {
        font-size: 12px;
    }
    .about-card .mini-btn {
        font-size: 13px;
        padding: 9px 14px;
    }
    .qq-num {
        font-size: 11px;
    }
}