/* AI 工具导航：左侧分类 + 右侧分区卡片 */
.tools-page {
    display: grid;
    grid-template-columns: 188px minmax(0, 1fr);
    gap: 28px;
    padding-top: 28px;
}

/* ---------- 侧栏 ---------- */
.tools-side { min-width: 0; }
.tools-side-nav {
    position: sticky;
    top: 88px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    max-height: calc(100vh - 108px);
    overflow-y: auto;
    padding: 14px 10px;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: #fff;
    scrollbar-width: thin;
}
.tools-side-title {
    padding: 0 12px 8px;
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: .5px;
}
.tools-side-item {
    display: flex;
    align-items: center;
    gap: 10px;
    height: 40px;
    padding: 0 12px;
    border-radius: 10px;
    color: var(--text-secondary);
    font-size: 15.5px;
    white-space: nowrap;
    transition: color .15s, background .15s;
}
.tools-side-item i { width: 18px; text-align: center; color: var(--text-muted); font-size: 16px; transition: color .15s; }
.tools-side-item span { flex: 1; }
.tools-side-item em { color: var(--text-muted); font-size: 13px; font-style: normal; font-variant-numeric: tabular-nums; }
.tools-side-item:hover { color: var(--primary); background: var(--border-light); }
.tools-side-item.active { color: #fff; background: var(--primary); font-weight: 600; }
.tools-side-item.active i,
.tools-side-item.active em { color: rgba(255, 255, 255, .85); }
.tools-side-item:hover i { color: var(--primary); }
.tools-side-item.active:hover i { color: #fff; }

/* ---------- 顶部横幅 ---------- */
.tools-hero {
    position: relative;
    overflow: hidden;
    padding: 34px 36px 30px;
    border: 1px solid var(--primary-soft);
    border-radius: 20px;
    background:
        radial-gradient(520px 220px at 100% 0%, rgba(99, 102, 241, .14), transparent 70%),
        radial-gradient(420px 200px at 0% 100%, rgba(59, 130, 246, .12), transparent 70%),
        linear-gradient(135deg, #F5F9FF 0%, #EEF4FF 100%);
}
.tools-hero-kicker {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    height: 28px;
    padding: 0 12px;
    border-radius: 999px;
    background: #fff;
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
}
.tools-hero h1 { margin-top: 14px; font-size: 30px; font-weight: 800; line-height: 1.3; letter-spacing: -.4px; }
.tools-hero p { margin-top: 8px; max-width: 620px; color: var(--text-secondary); font-size: 16px; }
.tools-search {
    display: flex;
    align-items: center;
    gap: 12px;
    max-width: 620px;
    height: 52px;
    margin-top: 22px;
    padding: 0 18px;
    border: 1px solid transparent;
    border-radius: 14px;
    background: #fff;
    color: var(--text-muted);
    font-size: 17px;
    box-shadow: 0 6px 20px rgba(52, 120, 229, .08);
    transition: border-color .2s, box-shadow .2s;
}
.tools-search:focus-within { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(52, 120, 229, .12); }
.tools-search input { flex: 1; min-width: 0; border: 0; outline: 0; background: transparent; color: var(--text-primary); font-size: 16px; }
.tools-hero-stats { display: flex; gap: 22px; margin-top: 18px; color: var(--text-muted); font-size: 14.5px; }
.tools-hero-stats b { margin-right: 3px; color: var(--text-primary); font-size: 19px; font-weight: 800; font-variant-numeric: tabular-nums; }

/* ---------- 分区 ---------- */
.tools-sec { margin-top: 34px; scroll-margin-top: 84px; }
.tools-sec-title {
    display: flex;
    align-items: center;
    gap: 9px;
    margin-bottom: 14px;
    font-size: 19px;
    font-weight: 700;
}
.tools-sec-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 9px;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 16px;
}
.tools-sec-count { margin-left: 2px; color: var(--text-muted); font-size: 14px; font-weight: 400; }
.tools-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
}
.tools-card {
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
    padding: 16px 36px 16px 16px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: #fff;
    transition: border-color .2s, box-shadow .2s, transform .2s;
}
.tools-card:hover {
    border-color: var(--primary);
    box-shadow: 0 10px 24px rgba(52, 120, 229, .10);
    transform: translateY(-2px);
}
.tools-card-logo {
    flex: none;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    border: 1px solid var(--border-light);
    object-fit: cover;
    background: var(--border-light);
}
.tools-card-initial {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 18px;
    font-weight: 700;
}
.tools-card-info { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.tools-card-info strong {
    overflow: hidden;
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 600;
    line-height: 1.4;
    white-space: nowrap;
    text-overflow: ellipsis;
}
.tools-card-info strong em {
    display: inline-block;
    margin-right: 5px;
    padding: 0 4px;
    border-radius: 4px;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 12px;
    font-style: normal;
    line-height: 17px;
    vertical-align: 2px;
}
.tools-card-info > span {
    overflow: hidden;
    color: var(--text-muted);
    font-size: 13.5px;
    line-height: 1.5;
    white-space: nowrap;
    text-overflow: ellipsis;
}
.tools-card-go {
    position: absolute;
    top: 50%;
    right: 14px;
    margin-top: -6px;
    color: var(--primary);
    font-size: 13px;
    opacity: 0;
    transform: translateX(-4px);
    transition: opacity .2s, transform .2s;
}
.tools-card:hover .tools-card-go { opacity: 1; transform: none; }
.tools-empty { padding: 60px 0; color: var(--text-muted); text-align: center; }

@media (max-width: 1280px) {
    .tools-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 1000px) {
    .tools-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
/* 窄屏：侧栏变成吸顶的横向分类条 */
@media (max-width: 900px) {
    .tools-page { display: block; padding-top: 18px; }
    .tools-side { position: sticky; top: 64px; z-index: 50; margin: 0 -16px; padding: 8px 16px; background: rgba(249, 250, 251, .94); -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); }
    .tools-side-nav {
        position: static;
        flex-direction: row;
        gap: 6px;
        padding: 0;
        overflow-x: auto;
        border: 0;
        background: transparent;
        scrollbar-width: none;
        scroll-behavior: smooth;
    }
    .tools-side-nav::-webkit-scrollbar { display: none; }
    .tools-side-nav { max-height: none; }
    .tools-side-title, .tools-side-item em { display: none; }
    .tools-side-item { flex: none; height: 34px; padding: 0 12px; border: 1px solid var(--border); background: #fff; font-size: 14.5px; }
    .tools-side-item.active { border-color: var(--primary); }
    .tools-side-item i { display: none; }
    .tools-hero { margin-top: 10px; padding: 22px 18px; border-radius: 16px; }
    .tools-hero h1 { font-size: 22px; }
    .tools-hero p { font-size: 15px; }
    .tools-search { height: 46px; }
    .tools-sec { scroll-margin-top: 120px; }
}
@media (max-width: 560px) {
    .tools-grid { grid-template-columns: minmax(0, 1fr); gap: 10px; }
    .tools-card { padding: 13px 32px 13px 13px; }
}

/* ---------- 横幅右侧轨道装饰 ---------- */
.tools-hero-text, .tools-search, .tools-hero-stats { position: relative; z-index: 1; }
.tools-orbit {
    position: absolute;
    top: 50%;
    right: 56px;
    width: 300px;
    height: 300px;
    margin-top: -150px;
    pointer-events: none;
}
.tools-orbit-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    border: 1.5px dashed rgba(52, 120, 229, .22);
    border-radius: 50%;
    transform: translate(-50%, -50%);
}
.tools-orbit-ring.r1 { width: 120px; height: 120px; border-style: solid; border-color: rgba(52, 120, 229, .14); background: rgba(255, 255, 255, .5); }
.tools-orbit-ring.r2 { width: 210px; height: 210px; animation: orbit-spin 60s linear infinite; }
.tools-orbit-ring.r3 { width: 300px; height: 300px; border-color: rgba(52, 120, 229, .12); }
.tools-orbit-core {
    position: absolute;
    top: 50%;
    left: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 68px;
    height: 68px;
    margin: -34px 0 0 -34px;
    border-radius: 20px;
    background: var(--grad-primary);
    color: #fff;
    font-size: 28px;
    box-shadow: 0 12px 28px rgba(52, 120, 229, .35);
}
.tools-orbit-icon {
    position: absolute;
    width: 46px;
    height: 46px;
    padding: 6px;
    border-radius: 14px;
    background: #fff;
    object-fit: contain;
    box-shadow: 0 8px 22px rgba(36, 50, 71, .12);
    animation: orbit-float 5s ease-in-out infinite;
}
/* 7 个图标分在中圈和外圈上 */
.tools-orbit-icon.o1 { top: 22px;  left: 127px; animation-delay: 0s; }
.tools-orbit-icon.o2 { top: 92px;  left: 238px; animation-delay: -.7s; }
.tools-orbit-icon.o3 { top: 214px; left: 220px; animation-delay: -1.4s; }
.tools-orbit-icon.o4 { top: 248px; left: 96px;  animation-delay: -2.1s; }
.tools-orbit-icon.o5 { top: 160px; left: 16px;  animation-delay: -2.8s; }
.tools-orbit-icon.o6 { top: 52px;  left: 40px;  animation-delay: -3.5s; }

@keyframes orbit-float {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-8px); }
}
@keyframes orbit-spin { to { transform: translate(-50%, -50%) rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
    .tools-orbit-icon, .tools-orbit-ring.r2 { animation-duration: 0s; }
}
@media (max-width: 1280px) {
    .tools-orbit { right: 20px; transform: scale(.82); transform-origin: right center; }
}
@media (max-width: 1100px) {
    .tools-orbit { display: none; }
}