/* 只在首页引用，不改变其他页面的公共样式。 */
.home-tools-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: start;
    gap: 32px;
    padding-top: 48px;
    padding-bottom: 48px;
}

.home-tools-layout .featured-resources { padding: 0; background: transparent; min-width: 0; }
.home-tools-layout .featured-resources > .container { padding: 0; }
.home-tools-layout .resource-cards { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.home-tools-layout .resource-content h3 { font-size: 1.3rem; }
.home-tools-layout .resource-author { font-size: 1rem; }

/* ---------- 热门工具榜（2026-10-04 美化） ---------- */
.popular-tools {
    min-width: 0;
    overflow: hidden;
    background: var(--white);
    border: 1px solid var(--light-grey);
    border-radius: var(--radius-xl);
    box-shadow: 0 12px 32px rgba(197, 88, 61, .12), 0 2px 6px rgba(53, 92, 54, .06);
}

/* 标题区：与导航“首页”“登录”同一组暖橙红渐变 */
.popular-tools-heading {
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 18px 16px 16px 18px;
    background: linear-gradient(135deg, #ff9a4d 0%, #f26b4a 55%, #e2553f 100%);
    color: #fff;
    overflow: hidden;
}
.popular-tools-heading::after {
    content: '';
    position: absolute;
    right: -40px;
    top: -60px;
    width: 160px;
    height: 160px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 255, 255, .28) 0%, rgba(255, 255, 255, 0) 70%);
    pointer-events: none;
}
.popular-tools-badge {
    flex: 0 0 44px;
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border-radius: 14px;
    background: rgba(255, 255, 255, .22);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .35);
    font-size: 1.25rem;
}
.popular-tools-titles { flex: 1; min-width: 0; }
.popular-tools-heading h2 { margin: 0; display: flex; align-items: center; gap: 8px; font-size: 1.25rem; font-weight: 700; color: #fff; letter-spacing: .02em; }
.popular-tools-heading h2 span {
    padding: 2px 8px;
    border-radius: 999px;
    background: #fff;
    color: #e2553f;
    font-size: .7rem;
    font-weight: 700;
    letter-spacing: .04em;
}
/* 网站段落默认楷体；榜单是紧凑小部件，说明与提示用黑体 */
.popular-tools-description, .popular-tools-status { font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif; }
.popular-tools-description { margin: 4px 0 0; font-size: .75rem; line-height: 1.5; color: rgba(255, 255, 255, .92); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.popular-tools-heading button {
    position: relative;
    z-index: 1;
    flex-shrink: 0;
    display: grid;
    place-items: center;
    width: 36px;
    height: 36px;
    border: 1px solid rgba(255, 255, 255, .45);
    border-radius: 50%;
    background: rgba(255, 255, 255, .18);
    color: #fff;
    font-size: .95rem;
    cursor: pointer;
    transition: var(--transition);
}
.popular-tools-heading button:hover { background: rgba(255, 255, 255, .32); }
.popular-tools-heading button:disabled { cursor: wait; }
.popular-tools.is-loading .popular-tools-heading button i { animation: popular-tools-spin .9s linear infinite; }
@keyframes popular-tools-spin { to { transform: rotate(360deg); } }

.popular-tools-status:empty { display: none; }
.popular-tools-status { margin: 0; padding: 14px 18px 4px; font-size: .8rem; line-height: 1.7; color: var(--grey-color); }

/* 榜单行：序号 | 图标 | 名称 + 热度条 | 次数 */
.popular-tools-list { list-style: none; margin: 0; padding: 8px 10px 4px; }
.popular-tools-link {
    display: grid;
    grid-template-columns: 24px 38px minmax(0, 1fr);
    align-items: center;
    gap: 10px;
    padding: 9px 8px;
    border-radius: var(--radius-md);
    color: var(--text-body);
    transition: var(--transition);
}
.popular-tools-link:hover { background: #fff6ec; text-decoration: none; transform: translateX(2px); }
.popular-tools-link:focus-visible, .popular-tools button:focus-visible, .popular-tools-footer a:focus-visible { outline: 3px solid #f26b4a; outline-offset: 2px; }

.popular-tools-rank { text-align: center; font-weight: 700; font-size: .95rem; color: #b0a594; font-variant-numeric: tabular-nums; }
/* 前三名：金、银、铜牌 */
.popular-tools-list li:nth-child(-n+3) .popular-tools-rank {
    display: grid;
    place-items: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    color: #fff;
    font-size: .8rem;
    box-shadow: 0 2px 6px rgba(0, 0, 0, .12);
}
.popular-tools-list li:nth-child(1) .popular-tools-rank { background: linear-gradient(135deg, #ffd36b, #f0a51c); }
.popular-tools-list li:nth-child(2) .popular-tools-rank { background: linear-gradient(135deg, #cfd8e3, #93a3b6); }
.popular-tools-list li:nth-child(3) .popular-tools-rank { background: linear-gradient(135deg, #f1b48a, #c97b4b); }
.popular-tools-list li:nth-child(1) .popular-tools-link { background: linear-gradient(90deg, #fff3e2 0%, rgba(255, 243, 226, 0) 100%); }

/* 图标：底色与图标色沿用网站分类配色 */
.popular-tools-icon {
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
    border-radius: 11px;
    background: var(--card-general);
    color: var(--icon-general);
    font-size: 1rem;
    overflow: hidden;
}
.popular-tools-icon img { width: 26px; height: 26px; object-fit: contain; }
.popular-tools-list li[data-category="math"] .popular-tools-icon { background: #fde3dd; color: var(--icon-math); }
.popular-tools-list li[data-category="science"] .popular-tools-icon { background: #e1f2de; color: var(--icon-science); }
.popular-tools-list li[data-category="language"] .popular-tools-icon { background: #e0f0fb; color: var(--icon-language); }
.popular-tools-list li[data-category="english"] .popular-tools-icon { background: #f3e6f8; color: var(--icon-english); }
.popular-tools-list li[data-category="history"] .popular-tools-icon { background: #ffeedd; color: var(--icon-history); }
.popular-tools-list li[data-category="general"] .popular-tools-icon,
.popular-tools-list li[data-category="game"] .popular-tools-icon { background: #fdebd3; color: var(--icon-general); }
.popular-tools-list li[data-category="download"] .popular-tools-icon { background: #e0f0fb; color: var(--secondary-color); }

.popular-tools-info { min-width: 0; display: flex; flex-direction: column; gap: 4px; }
.popular-tools-meta { display: flex; align-items: center; gap: 8px; }
.popular-tools-name { display: block; font-size: .9rem; font-weight: 600; line-height: 1.35; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.popular-tools-bar { flex: 1; display: block; height: 5px; border-radius: 999px; background: #f3ece0; overflow: hidden; }
.popular-tools-bar i { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, #ffc37a, #f26b4a); transition: width .6s ease; }
.popular-tools-count { flex: 0 0 auto; white-space: nowrap; font-variant-numeric: tabular-nums; font-size: .72rem; color: var(--grey-color); }
.popular-tools-count b { font-size: .85rem; font-weight: 700; color: var(--text-title); }

/* 底部：实时更新时间 + 全部工具 */
.popular-tools-more { display: none; }
.popular-tools-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 6px;
    padding: 12px 18px 14px;
    border-top: 1px solid var(--light-grey);
    background: #fcf9f3;
    font-size: .75rem;
    color: var(--grey-color);
}
.popular-tools-live { display: inline-flex; align-items: center; gap: 6px; }
.popular-tools-live::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #2fbf71;
    box-shadow: 0 0 0 0 rgba(47, 191, 113, .5);
    animation: popular-tools-pulse 2s ease-out infinite;
}
@keyframes popular-tools-pulse { 70% { box-shadow: 0 0 0 6px rgba(47, 191, 113, 0); } 100% { box-shadow: 0 0 0 0 rgba(47, 191, 113, 0); } }
.popular-tools-footer a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border: 1px solid #f7c3b4;
    border-radius: 999px;
    background: #fff;
    color: #e2553f;
    font-weight: 600;
}
.popular-tools-footer a:hover { background: #fff3ee; text-decoration: none; }

@media (prefers-reduced-motion: reduce) {
    .popular-tools-live::before, .popular-tools.is-loading .popular-tools-heading button i { animation: none; }
    .popular-tools-link, .popular-tools-bar i { transition: none; }
}

@media (max-width: 1100px) and (min-width: 901px) {
    .home-tools-layout .resource-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 900px) {
    .home-tools-layout { grid-template-columns: minmax(0, 1fr); padding-top: 32px; padding-bottom: 32px; }
    .home-tools-layout .resource-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 540px) {
    .home-tools-layout .resource-cards { grid-template-columns: minmax(0, 1fr); }
    /* 手机：默认只显示前五名，可展开 */
    .popular-tools:not(.is-expanded) .popular-tools-list li:nth-child(n+6) { display: none; }
    .popular-tools-more:not([hidden]) {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 6px;
        width: calc(100% - 20px);
        margin: 2px 10px 0;
        padding: 9px;
        border: 1px dashed #f3c9b9;
        border-radius: var(--radius-md);
        background: #fffaf6;
        color: #e2553f;
        font-size: .8rem;
        font-weight: 600;
        cursor: pointer;
    }
    .popular-tools.is-expanded .popular-tools-more i { transform: rotate(180deg); }
}