/* ai.452820004.com 样式 */
:root {
    --brand: #4f46e5;
    --brand-2: #06b6d4;
    --ink: #0f172a;
    --ink-2: #475569;
    --ink-3: #94a3b8;
    --line: #e6e9f2;
    --bg: #f6f7fb;
    --card: #ffffff;
    --radius: 16px;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);
    --shadow-md: 0 8px 24px rgba(15, 23, 42, .08);
    --shadow-lg: 0 18px 50px rgba(15, 23, 42, .16);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    font-size: 15px;
    line-height: 1.65;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

.wrap { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 20px; }

/* ---------- 顶部 ---------- */
.site-header {
    position: sticky; top: 0; z-index: 30;
    background: rgba(255, 255, 255, .86);
    backdrop-filter: saturate(180%) blur(14px);
    border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 18px; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 9px; font-weight: 700; font-size: 17px; flex: none; }
.brand-mark {
    width: 30px; height: 30px; border-radius: 10px;
    display: inline-flex; align-items: center; justify-content: center;
    color: #fff; font-size: 15px;
    background: linear-gradient(135deg, var(--brand), var(--brand-2));
    box-shadow: 0 6px 16px rgba(79, 70, 229, .35);
}
.header-search { flex: 1; display: flex; max-width: 460px; }
.header-search input {
    flex: 1; min-width: 0; height: 38px; padding: 0 14px;
    border: 1px solid var(--line); border-right: 0;
    border-radius: 10px 0 0 10px; background: #fff; color: var(--ink);
    font-size: 14px; outline: none;
}
.header-search input:focus { border-color: #c7d2fe; box-shadow: 0 0 0 3px rgba(79, 70, 229, .1); }
.header-search button {
    height: 38px; padding: 0 16px; border: 0; cursor: pointer;
    border-radius: 0 10px 10px 0; color: #fff; font-size: 14px;
    background: linear-gradient(135deg, var(--brand), var(--brand-2));
}
.header-nav { display: flex; gap: 6px; margin-left: auto; }
.header-nav a {
    padding: 7px 12px; border-radius: 9px; color: var(--ink-2); font-size: 14px;
}
.header-nav a:hover { background: #eef2ff; color: var(--brand); }

.page { min-height: 60vh; padding-bottom: 60px; }

/* ---------- 首页 hero ---------- */
.hero {
    position: relative; overflow: hidden;
    padding: 54px 0 40px; text-align: center;
    background:
        radial-gradient(900px 380px at 12% -10%, rgba(79, 70, 229, .16), transparent),
        radial-gradient(760px 340px at 92% 0%, rgba(6, 182, 212, .16), transparent);
}
.hero h1 { margin: 0 0 12px; font-size: 34px; line-height: 1.3; letter-spacing: -.5px; }
.hero h1 span {
    background: linear-gradient(120deg, var(--brand), var(--brand-2));
    -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p { margin: 0 auto 26px; max-width: 620px; color: var(--ink-2); font-size: 15px; }
.hero-stats { display: flex; justify-content: center; gap: 28px; flex-wrap: wrap; margin-bottom: 26px; }
.hero-stats div { font-size: 13px; color: var(--ink-3); }
.hero-stats strong { display: block; font-size: 22px; color: var(--ink); }
.hero-search { display: flex; max-width: 560px; margin: 0 auto; box-shadow: var(--shadow-md); border-radius: 14px; }
.hero-search input {
    flex: 1; min-width: 0; height: 50px; padding: 0 18px; font-size: 15px;
    border: 1px solid var(--line); border-right: 0; border-radius: 14px 0 0 14px; outline: none;
}
.hero-search input:focus { border-color: #c7d2fe; }
.hero-search button {
    height: 50px; padding: 0 26px; border: 0; cursor: pointer; font-size: 15px;
    color: #fff; border-radius: 0 14px 14px 0;
    background: linear-gradient(135deg, var(--brand), var(--brand-2));
}
.hero-chips { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin-top: 16px; }
.hero-chips a {
    padding: 5px 12px; border-radius: 999px; font-size: 13px;
    background: #fff; border: 1px solid var(--line); color: var(--ink-2);
}
.hero-chips a:hover { border-color: #c7d2fe; color: var(--brand); }

/* ---------- 区块标题 ---------- */
.section { padding-top: 42px; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 14px; margin-bottom: 18px; }
.section-head h2 { margin: 0; font-size: 21px; letter-spacing: -.3px; }
.section-head .more { font-size: 13px; color: var(--brand); white-space: nowrap; }
.section-sub { margin: 4px 0 0; color: var(--ink-3); font-size: 13px; }

/* ---------- 分类网格 ---------- */
.cat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(228px, 1fr)); gap: 14px; }
.cat-card {
    display: block; padding: 18px; border-radius: var(--radius);
    background: var(--card); border: 1px solid var(--line); box-shadow: var(--shadow-sm);
    transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease;
}
.cat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: #dbe2f3; }
.cat-card-top { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
.cat-icon {
    width: 40px; height: 40px; border-radius: 12px; flex: none;
    display: flex; align-items: center; justify-content: center; font-size: 20px;
    background: #eef2ff;
}
.cat-card h3 { margin: 0; font-size: 15.5px; }
.cat-card .cat-count { margin-left: auto; font-size: 12px; color: var(--ink-3); flex: none; }
.cat-card p { margin: 0; font-size: 13px; color: var(--ink-2); line-height: 1.6; }

/* ---------- 产品卡片 ---------- */
.tool-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 14px; }
.tool-card {
    display: flex; flex-direction: column; gap: 10px;
    padding: 16px; border-radius: var(--radius); background: var(--card);
    border: 1px solid var(--line); box-shadow: var(--shadow-sm);
    transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease;
    min-width: 0;
}
.tool-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: #dbe2f3; }
.tool-head { display: flex; align-items: center; gap: 11px; min-width: 0; }
.tool-logo {
    width: 42px; height: 42px; border-radius: 12px; flex: none;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 15px; color: #fff; letter-spacing: -.5px;
    background: linear-gradient(135deg, var(--brand), var(--brand-2));
}
.tool-title { min-width: 0; }
.tool-title h3 { margin: 0; font-size: 15.5px; display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.tool-title .sub { margin: 2px 0 0; font-size: 12.5px; color: var(--ink-3); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tool-desc { margin: 0; font-size: 13.2px; color: var(--ink-2); line-height: 1.65; overflow-wrap: anywhere; }
.tool-foot { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: auto; padding-top: 4px; }

.badge {
    display: inline-flex; align-items: center; gap: 5px;
    padding: 2px 9px; border-radius: 999px; font-size: 11.5px; line-height: 1.7;
    border: 1px solid transparent; white-space: nowrap;
}
.badge.free { background: #ecfdf5; color: #047857; border-color: #a7f3d0; }
.badge.freemium { background: #eef2ff; color: #4338ca; border-color: #c7d2fe; }
.badge.paid { background: #fff7ed; color: #b45309; border-color: #fed7aa; }
.badge.trial { background: #f0f9ff; color: #0369a1; border-color: #bae6fd; }
.badge.cn { background: #fef2f2; color: #b91c1c; border-color: #fecaca; }
.badge.global { background: #f5f3ff; color: #6d28d9; border-color: #ddd6fe; }
.badge.ghost { background: #f8fafc; color: var(--ink-2); border-color: var(--line); }

/* ---------- 详情页 ---------- */
.crumbs { padding: 22px 0 0; font-size: 13px; color: var(--ink-3); display: flex; gap: 8px; flex-wrap: wrap; }
.crumbs a:hover { color: var(--brand); }

.detail-head {
    margin-top: 14px; padding: 24px; border-radius: 20px; background: var(--card);
    border: 1px solid var(--line); box-shadow: var(--shadow-sm);
}
.detail-top { display: flex; gap: 16px; align-items: flex-start; }
.detail-logo {
    width: 64px; height: 64px; border-radius: 18px; flex: none;
    display: flex; align-items: center; justify-content: center;
    font-size: 22px; font-weight: 700; color: #fff; letter-spacing: -1px;
    background: linear-gradient(135deg, var(--brand), var(--brand-2));
    box-shadow: 0 10px 24px rgba(79, 70, 229, .28);
}
.detail-info { min-width: 0; flex: 1; }
.detail-info h1 { margin: 0 0 4px; font-size: 26px; letter-spacing: -.4px; }
.detail-tagline { margin: 0 0 10px; color: var(--ink-2); font-size: 14.5px; }
.detail-badges { display: flex; gap: 8px; flex-wrap: wrap; }
.detail-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px; }
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 7px;
    height: 42px; padding: 0 20px; border-radius: 11px; font-size: 14.5px; font-weight: 500;
    border: 1px solid transparent; cursor: pointer;
}
.btn-primary { color: #fff; background: linear-gradient(135deg, var(--brand), var(--brand-2)); box-shadow: 0 8px 20px rgba(79, 70, 229, .28); }
.btn-primary:hover { filter: brightness(1.05); }
.btn-ghost { background: #fff; border-color: var(--line); color: var(--ink-2); }
.btn-ghost:hover { border-color: #c7d2fe; color: var(--brand); }

.detail-grid { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 18px; margin-top: 18px; align-items: start; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow-sm); }
.card + .card { margin-top: 16px; }
.card h2 { margin: 0 0 14px; font-size: 17px; display: flex; align-items: center; gap: 8px; }
.card h2 .dot { width: 6px; height: 14px; border-radius: 4px; background: linear-gradient(180deg, var(--brand), var(--brand-2)); display: inline-block; }
.prose { color: var(--ink-2); font-size: 14.5px; line-height: 1.85; overflow-wrap: anywhere; }
.prose p { margin: 0 0 12px; }
.prose p:last-child { margin-bottom: 0; }

.feature-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.feature-list li {
    position: relative; padding: 11px 14px 11px 38px; border-radius: 11px;
    background: #f8fafc; border: 1px solid #eef1f7; font-size: 14px; color: var(--ink-2);
}
.feature-list li::before {
    content: "✓"; position: absolute; left: 13px; top: 11px;
    width: 17px; height: 17px; border-radius: 50%; font-size: 11px; line-height: 17px; text-align: center;
    color: #fff; background: linear-gradient(135deg, var(--brand), var(--brand-2));
}

.price-box { display: grid; gap: 10px; }
.price-row { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; color: var(--ink-2); }
.price-row .badge { flex: none; }
.meta-list { display: grid; gap: 12px; }
.meta-item { display: flex; flex-direction: column; gap: 2px; font-size: 13.5px; }
.meta-item .k { color: var(--ink-3); font-size: 12.5px; }
.meta-item a { color: var(--brand); overflow-wrap: anywhere; }
.tag-cloud { display: flex; gap: 8px; flex-wrap: wrap; }
.tag-cloud a { padding: 4px 11px; border-radius: 999px; background: #f8fafc; border: 1px solid var(--line); font-size: 12.5px; color: var(--ink-2); }
.tag-cloud a:hover { border-color: #c7d2fe; color: var(--brand); }

/* ---------- 列表/搜索 ---------- */
.page-head { padding: 34px 0 20px; }
.page-head h1 { margin: 0 0 8px; font-size: 26px; letter-spacing: -.4px; }
.page-head p { margin: 0; color: var(--ink-2); font-size: 14px; }
.filter-bar { display: flex; gap: 8px; flex-wrap: wrap; margin: 18px 0 22px; }
.filter-bar a {
    padding: 7px 14px; border-radius: 999px; font-size: 13.5px;
    background: #fff; border: 1px solid var(--line); color: var(--ink-2);
}
.filter-bar a.active, .filter-bar a:hover { background: #eef2ff; border-color: #c7d2fe; color: var(--brand); }

.pager { display: flex; gap: 8px; justify-content: center; margin-top: 30px; flex-wrap: wrap; }
.pager a, .pager span {
    min-width: 38px; height: 38px; padding: 0 12px; border-radius: 10px;
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 14px; background: #fff; border: 1px solid var(--line); color: var(--ink-2);
}
.pager a:hover { border-color: #c7d2fe; color: var(--brand); }
.pager span.current { background: linear-gradient(135deg, var(--brand), var(--brand-2)); color: #fff; border-color: transparent; }

.empty { padding: 60px 20px; text-align: center; color: var(--ink-3); }

/* ---------- 页脚 ---------- */
.site-footer { margin-top: 60px; border-top: 1px solid var(--line); background: #fff; padding: 34px 0 26px; }
.footer-cols { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.footer-brand { display: flex; align-items: center; gap: 9px; font-weight: 700; margin-bottom: 8px; }
.footer-desc { margin: 0; color: var(--ink-3); font-size: 13px; max-width: 420px; }
.footer-links { display: flex; gap: 18px; font-size: 13.5px; color: var(--ink-2); flex-wrap: wrap; }
.footer-links a:hover { color: var(--brand); }
.footer-copy { margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--line); font-size: 12.5px; color: var(--ink-3); }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
    .detail-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .header-inner { height: auto; padding: 10px 0; flex-wrap: wrap; gap: 10px; }
    .header-search { order: 3; flex: 1 1 100%; max-width: none; }
    .header-nav { margin-left: auto; }
    .hero { padding: 34px 0 26px; }
    .hero h1 { font-size: 25px; }
    .hero p { font-size: 14px; }
    .hero-stats { gap: 18px; }
    .hero-stats strong { font-size: 19px; }
    .hero-search input { height: 46px; padding: 0 14px; font-size: 14px; }
    .hero-search button { height: 46px; padding: 0 18px; }
    .cat-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
    .cat-card { padding: 14px; }
    .cat-icon { width: 34px; height: 34px; border-radius: 10px; font-size: 17px; }
    .cat-card .cat-count { display: none; }
    .tool-grid { grid-template-columns: 1fr; }
    .detail-head { padding: 18px; }
    .detail-top { gap: 12px; }
    .detail-logo { width: 52px; height: 52px; border-radius: 15px; font-size: 18px; }
    .detail-info h1 { font-size: 21px; }
    .detail-actions .btn { flex: 1 1 auto; }
    .card { padding: 17px; }
    .section { padding-top: 30px; }
    .section-head h2 { font-size: 18px; }
}