/* 金意汇官网 · 单文件样式
   配色与主系统（app/frontend-src/css/style.css）保持一致：
   brand #2563eb / brand2 #7c3aed / bg #f0f2f5 / panel #fff / text #1f2937 / border #e5e7eb
   性能约定：不引任何外部字体/图标库，图标用文字块与内联 SVG，
   全站仅本文件 + site.js，gzip 后合计 < 8KB，2M 网络下首屏 < 300ms。 */

:root{
  /* 主色：与主系统 --brand / --brand2 完全一致 */
  --pri:#2563eb; --pri-2:#1d4ed8; --acc:#7c3aed;
  --grad:linear-gradient(120deg,#2563eb 0%,#7c3aed 100%);
  /* 中性色：与主系统 --bg / --panel / --text / --muted / --border / --active / --hover 对齐 */
  --bg:#f0f2f5; --bg-soft:#f8fafc; --bg-card:#ffffff;
  --line:#e5e7eb; --line-2:#cbd5e1;
  --tx:#1f2937; --tx-2:#4b5563; --tx-3:#6b7280;
  --active:#dbeafe; --hover:#f3f4f6;
  --green:#16a34a; --red:#dc2626; --orange:#ea580c;
  --r:14px; --r-lg:20px;
  --sh:0 2px 8px rgba(15,23,42,.06),0 8px 24px rgba(15,23,42,.06);
  --sh-lg:0 8px 20px rgba(15,23,42,.1),0 20px 48px rgba(15,23,42,.1);
  --nav-h:66px;
  --ease:cubic-bezier(.22,.68,.32,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 16px)}
body{
  margin:0;background:var(--bg);color:var(--tx);
  font:15px/1.75 'Microsoft YaHei','PingFang SC','Inter',system-ui,-apple-system,"Segoe UI",sans-serif;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;letter-spacing:-.01em;color:var(--tx)}
p{margin:0 0 1em}
ul,ol{margin:0;padding:0;list-style:none}
button,input,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--pri);outline-offset:2px;border-radius:6px}

.wrap{width:min(1200px,100% - 40px);margin-inline:auto}
.wrap-narrow{width:min(820px,100% - 40px);margin-inline:auto}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--pri);color:#fff;padding:10px 16px;z-index:99}
.skip-link:focus{left:8px;top:8px}
.muted{color:var(--tx-3)}
.small{font-size:13px}
.pt-0{padding-top:0}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- 滚动进场 ---------- */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  *{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:10px 18px;border-radius:10px;border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:transform .2s var(--ease),box-shadow .25s var(--ease),background .25s,border-color .25s,color .25s;
}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 6px 18px rgba(37,99,235,.28)}
.btn-primary:hover{box-shadow:0 12px 28px rgba(124,58,237,.32)}
.btn-outline{border-color:var(--line-2);color:var(--tx);background:#fff}
.btn-outline:hover{border-color:var(--pri);color:var(--pri);background:var(--active)}
.btn-ghost{color:var(--tx-2);background:transparent}
.btn-ghost:hover{color:var(--pri);background:var(--hover)}
.btn-lg{padding:14px 28px;font-size:16px;border-radius:12px}
.btn-sm{padding:6px 12px;font-size:13px}
.btn-block{width:100%}
.btn-link{color:var(--pri);background:none;border:none;padding:8px 0}
.btn-link:hover{color:var(--pri-2);transform:none}

/* ---------- 导航 ---------- */
.nav{
  position:sticky;top:0;z-index:60;height:var(--nav-h);
  background:rgba(255,255,255,.82);backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;transition:background .3s,border-color .3s,box-shadow .3s;
}
.nav.is-stuck{background:rgba(255,255,255,.95);border-bottom-color:var(--line);box-shadow:0 2px 12px rgba(15,23,42,.06)}
.nav-inner{height:100%;display:flex;align-items:center;gap:24px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:36px;height:36px;border-radius:10px;display:grid;place-items:center;
  background:var(--grad);color:#fff;font-weight:800;font-size:19px;
  box-shadow:0 4px 12px rgba(37,99,235,.25);
}
.brand-logo{height:34px;width:auto;max-width:160px;object-fit:contain;border-radius:8px;flex-shrink:0}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:17px;letter-spacing:.5px;color:var(--tx)}
.brand-text small{font-size:11px;color:var(--tx-3);letter-spacing:1px}
.nav-menu{display:flex;gap:4px;margin-left:auto}
.nav-menu a{padding:8px 12px;border-radius:8px;font-size:15px;color:var(--tx-2);transition:color .2s,background .2s}
.nav-menu a:hover{color:var(--pri);background:var(--active)}
.nav-cta{display:flex;gap:8px;align-items:center}
.nav-toggle{display:none;width:40px;height:36px;border:1px solid var(--line-2);border-radius:9px;background:#fff;cursor:pointer;padding:9px}
.nav-toggle span{display:block;height:2px;background:var(--tx-2);border-radius:2px;margin:3px 0;transition:transform .3s,opacity .3s}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* ---------- Hero ---------- */
.hero{
  position:relative;padding:64px 0 52px;overflow:hidden;
  background:linear-gradient(180deg,#eef2ff 0%,#f8fafc 55%,var(--bg) 100%);
  border-bottom:1px solid var(--line);
}
.hero-glow{position:absolute;inset:-25% -10% auto;height:640px;pointer-events:none;filter:blur(72px);opacity:.28}
.hero-glow i{position:absolute;display:block;border-radius:50%}
.hero-glow i:nth-child(1){width:420px;height:420px;left:4%;top:8%;background:#3b82f6;animation:float1 16s var(--ease) infinite alternate}
.hero-glow i:nth-child(2){width:340px;height:340px;right:10%;top:0;background:#8b5cf6;animation:float2 19s var(--ease) infinite alternate}
.hero-glow i:nth-child(3){width:300px;height:300px;left:44%;top:36%;background:#06b6d4;animation:float3 22s var(--ease) infinite alternate}
@keyframes float1{to{transform:translate(60px,-40px) scale(1.15)}}
@keyframes float2{to{transform:translate(-70px,50px) scale(1.1)}}
@keyframes float3{to{transform:translate(40px,60px) scale(.9)}}
.hero-inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  border:1px solid var(--line);background:#fff;box-shadow:var(--sh);
  font-size:13px;color:var(--tx-2);margin-bottom:20px;
}
.hero h1{font-size:clamp(30px,4.4vw,50px);letter-spacing:-.02em;margin-bottom:18px;color:var(--tx)}
.hero-desc{font-size:16.5px;color:var(--tx-2);max-width:620px;margin-bottom:28px;white-space:pre-line}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:22px}
.hero-points{display:flex;gap:20px;flex-wrap:wrap;font-size:14px;color:var(--tx-3)}
.hero-points li{position:relative;padding-left:18px}
.hero-points li::before{content:"";position:absolute;left:0;top:9px;width:9px;height:9px;border-radius:50%;background:var(--green);box-shadow:0 0 0 3px rgba(22,163,74,.16)}
.hero-art{position:relative}
.hero-art img{width:100%;filter:drop-shadow(0 18px 36px rgba(15,23,42,.14));animation:artIn 1.1s var(--ease) both}
@keyframes artIn{from{opacity:0;transform:translateY(24px) scale(.98)}to{opacity:1;transform:none}}

.stats{
  position:relative;margin-top:48px;display:grid;grid-template-columns:repeat(4,1fr);
  gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  box-shadow:var(--sh);
}
.stats li{background:#fff;padding:24px 20px;text-align:center}
.stats b{display:block;font-size:clamp(24px,3vw,34px);font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;font-variant-numeric:tabular-nums}
.stats span{font-size:13px;color:var(--tx-3)}

/* ---------- 区块 ---------- */
.section{padding:72px 0;position:relative}
.section-soft{background:var(--bg-soft);border-block:1px solid var(--line)}
.sec-head{max-width:760px;margin:0 auto 44px;text-align:center}
.sec-kicker{font-size:13px;letter-spacing:2px;color:var(--pri);text-transform:uppercase;margin-bottom:10px;font-weight:700}
.sec-head h2{font-size:clamp(24px,3.1vw,34px);margin-bottom:14px}
.sec-sub{color:var(--tx-2);font-size:16px;white-space:pre-line}
.sec-more{margin-top:34px;display:flex;gap:16px;justify-content:center;align-items:center;flex-wrap:wrap}

.grid{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

/* ---------- 卡片 ---------- */
.card{
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-lg);padding:26px;
  transition:transform .3s var(--ease),border-color .3s,box-shadow .3s;
}
.card:hover{border-color:#bfdbfe;box-shadow:var(--sh-lg)}
.card h3{font-size:19px;margin-bottom:10px}
.card p{color:var(--tx-2);font-size:15px;margin:0}
.card.flat{background:#fff}
.tilt:hover{transform:translateY(-5px)}
.ic{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  font-weight:800;font-size:18px;margin-bottom:16px;color:#fff;
  box-shadow:0 4px 12px rgba(37,99,235,.25);
}
.ic-blue{background:linear-gradient(145deg,#2563eb,#3b82f6)}
.ic-green{background:linear-gradient(145deg,#16a34a,#4ade80)}
.ic-purple{background:linear-gradient(145deg,#7c3aed,#a78bfa)}
.ic-orange{background:linear-gradient(145deg,#ea580c,#fb923c)}
.ic-cyan{background:linear-gradient(145deg,#0891b2,#22d3ee)}
.ic-red{background:linear-gradient(145deg,#dc2626,#f87171)}

/* ---------- 步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.steps li{position:relative;padding:30px 26px;border:1px solid var(--line);border-radius:var(--r-lg);background:#fff;box-shadow:var(--sh)}
.step-no{
  position:absolute;top:-18px;left:26px;width:38px;height:38px;border-radius:11px;
  display:grid;place-items:center;font-weight:800;color:#fff;
  background:var(--grad);box-shadow:0 6px 16px rgba(37,99,235,.3);
}
.steps h3{font-size:18px;margin:6px 0 10px}
.steps p{color:var(--tx-2);font-size:15px;margin:0}

/* ---------- 定价 ---------- */
/* 套餐数量不固定（主系统后台可增删），故用 flex 自适应而非固定列数栅格：
   - flex-basis 280px：一行最多放下几个由宽度自然决定，不会留空列
   - max-width 360px：超宽屏下卡片不会被拉成扁条，整体居中
   - justify-content:center：奇数个套餐时末尾单卡居中，不出现左悬挂的孤儿 */
.pricing{display:flex;flex-wrap:wrap;justify-content:center;gap:20px;align-items:stretch}
.pricing > *{flex:1 1 280px;min-width:0;max-width:360px}
.price-card{
  position:relative;display:flex;flex-direction:column;gap:12px;
  border:1px solid var(--line);border-radius:var(--r-lg);padding:28px 24px;background:#fff;
  transition:transform .3s var(--ease),border-color .3s,box-shadow .3s;
}
.price-card:hover{transform:translateY(-6px);box-shadow:var(--sh-lg)}
.price-card.is-hot{border-color:#a5b4fc;box-shadow:0 0 0 2px rgba(124,58,237,.16),var(--sh)}
.price-card .badge{
  position:absolute;top:-12px;right:18px;padding:4px 12px;border-radius:999px;
  font-size:12px;font-weight:700;color:#fff;background:var(--grad);
  box-shadow:0 4px 12px rgba(124,58,237,.32);
}
.price-card h3{font-size:18px}
.price{display:flex;align-items:baseline;gap:3px;flex-wrap:wrap;margin:0;color:var(--tx)}
.price small{font-size:14px;color:var(--tx-3)}
.price b{font-size:36px;font-weight:800;letter-spacing:-.02em}
.price-desc{font-size:13px;color:var(--tx-3);margin:0}
.price-list{display:flex;flex-direction:column;gap:9px;font-size:14px;color:var(--tx-2);margin:6px 0 auto;padding-top:12px;border-top:1px dashed var(--line)}
.price-list li{position:relative;padding-left:22px}
.price-list li::before{
  content:"";position:absolute;left:0;top:8px;width:13px;height:8px;
  border-left:2px solid var(--green);border-bottom:2px solid var(--green);transform:rotate(-45deg);
}
.pricing-note{margin-top:26px;text-align:center;font-size:14px;white-space:pre-line}

/* ---------- 文章卡片 ---------- */
.post-card{
  display:flex;flex-direction:column;border:1px solid var(--line);border-radius:var(--r-lg);
  background:#fff;overflow:hidden;transition:transform .3s var(--ease),border-color .3s,box-shadow .3s;
}
.post-card:hover{transform:translateY(-5px);border-color:#bfdbfe;box-shadow:var(--sh-lg)}
.post-link{display:block;padding:24px 24px 12px}
.post-tag{
  display:inline-block;padding:3px 10px;border-radius:6px;font-size:12px;font-weight:600;
  color:var(--pri-2);background:var(--active);margin-bottom:12px;
}
.post-card h3{font-size:17px;margin-bottom:10px;transition:color .2s}
.post-card:hover h3{color:var(--pri)}
.post-sum{color:var(--tx-2);font-size:14px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;margin:0}
.post-meta{display:flex;gap:8px;align-items:center;padding:14px 24px 20px;font-size:12px;color:var(--tx-3);border-top:1px solid var(--line);margin-top:auto}

.post-list{display:flex;flex-direction:column;gap:16px}
.post-row{
  display:flex;gap:22px;padding:24px;border:1px solid var(--line);border-radius:var(--r-lg);
  background:#fff;transition:border-color .3s,transform .3s var(--ease),box-shadow .3s;
}
.post-row:hover{border-color:#bfdbfe;transform:translateY(-2px);box-shadow:var(--sh)}
.post-row-main{flex:1;min-width:0}
.post-row-top{display:flex;gap:12px;align-items:center;margin-bottom:8px}
.post-row-top time{font-size:12px;color:var(--tx-3)}
.post-row h2{font-size:19px;margin-bottom:8px}
.post-row h2 a:hover{color:var(--pri)}
.post-sum{color:var(--tx-2);font-size:15px;margin:0}
.post-foot{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:12px 0 0;font-size:12px;color:var(--tx-3)}
.tag-mini{padding:2px 9px;border-radius:999px;background:var(--hover);color:var(--tx-2);font-size:12px}
a.tag-mini:hover{background:var(--active);color:var(--pri-2)}
.post-row-cover{flex:0 0 160px}
.post-row-cover img{width:160px;height:104px;object-fit:cover;border-radius:12px}

/* ---------- 评价 ---------- */
.quote{margin:0;padding:28px;border:1px solid var(--line);border-radius:var(--r-lg);background:#fff}
.quote blockquote{margin:0 0 18px;font-size:15px;color:var(--tx-2);position:relative;padding-left:22px}
.quote blockquote::before{content:"“";position:absolute;left:0;top:-10px;font-size:34px;color:#93c5fd;line-height:1}
.quote figcaption{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--tx-3)}
.quote figcaption .who{display:flex;flex-direction:column;gap:2px;min-width:0}
.quote figcaption b{color:var(--tx);font-size:14px}
.quote .avatar{width:46px;height:46px;border-radius:50%;object-fit:cover;flex:0 0 auto;background:#e5edff;border:1px solid var(--line)}
.quote .avatar-empty{display:inline-flex;align-items:center;justify-content:center;font-weight:600;color:#2563eb;font-size:18px}

/* ---------- FAQ ---------- */
.faq{display:flex;flex-direction:column;gap:12px}
.faq-item{border:1px solid var(--line);border-radius:var(--r);background:#fff;overflow:hidden}
.faq-item summary{
  cursor:pointer;padding:18px 22px;font-weight:600;font-size:16px;list-style:none;color:var(--tx);
  display:flex;justify-content:space-between;gap:16px;align-items:center;transition:background .2s,color .2s;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:22px;color:var(--pri);transition:transform .3s var(--ease);line-height:1}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item summary:hover{background:var(--hover);color:var(--pri)}
.faq-body{padding:0 22px 20px;color:var(--tx-2);font-size:15px}
.faq-body p{margin:0}

/* ---------- 联系表单 ---------- */
.contact-grid{display:grid;grid-template-columns:1.4fr .8fr;gap:24px;align-items:start}
.contact-form{display:flex;flex-direction:column;gap:16px}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:7px}
.field span{font-size:14px;color:var(--tx-2);font-weight:600}
.field i{color:var(--red);font-style:normal}
.field input,.field textarea{
  padding:12px 14px;border-radius:10px;border:1px solid var(--line-2);
  background:#fff;transition:border-color .2s,box-shadow .2s;font-size:15px;width:100%;color:var(--tx);
}
.field input::placeholder,.field textarea::placeholder{color:#9ca3af}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--pri);box-shadow:0 0 0 3px rgba(37,99,235,.14)}
.field textarea{resize:vertical;min-height:100px}
.form-tip{margin:0;min-height:22px;font-size:14px}
.form-tip.ok{color:#15803d}
.form-tip.err{color:var(--red)}
.contact-side{display:flex;flex-direction:column;gap:16px}
.contact-side .card p{margin:0 0 6px}
.contact-side .btn{margin-top:12px}

/* ---------- CTA ---------- */
.cta-band{padding:52px 0;background:linear-gradient(120deg,#eef2ff,#f5f3ff);border-block:1px solid var(--line)}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.cta-inner h2{font-size:26px;margin-bottom:8px}
.cta-inner p{color:var(--tx-2);margin:0}

/* ---------- 页头 / 面包屑 ---------- */
.page-head{padding:40px 0 28px;border-bottom:1px solid var(--line);background:#fff}
.crumbs{display:flex;gap:8px;align-items:center;font-size:13px;color:var(--tx-3);margin-bottom:14px;flex-wrap:wrap}
.crumbs a:hover{color:var(--pri)}
.crumbs i{font-style:normal;opacity:.5}
.page-head h1{font-size:clamp(24px,3.2vw,34px);margin-bottom:12px}
.page-head-sub{color:var(--tx-2);max-width:760px}
.inline-search{display:flex;gap:8px;margin-top:20px;max-width:520px}
.inline-search input{
  flex:1;padding:11px 14px;border-radius:10px;border:1px solid var(--line-2);
  background:#fff;font-size:15px;color:var(--tx);
}
.inline-search input:focus{outline:none;border-color:var(--pri);box-shadow:0 0 0 3px rgba(37,99,235,.14)}

/* ---------- 文章详情 ---------- */
.art-page{padding-bottom:0}
.art-head{padding:32px 0 24px;border-bottom:1px solid var(--line);background:#fff}
.art-head h1{font-size:clamp(24px,3.4vw,38px);margin-bottom:16px}
.art-meta{display:flex;gap:10px;align-items:center;flex-wrap:wrap;font-size:13px;color:var(--tx-3);margin-bottom:14px}
.art-lead{font-size:16.5px;color:var(--tx-2);padding:16px 20px;border-left:3px solid var(--pri);background:var(--active);border-radius:0 10px 10px 0}
.art-wrap{display:grid;grid-template-columns:210px minmax(0,1fr);gap:44px;padding:40px 0 56px;align-items:start}
.art-toc{position:sticky;top:calc(var(--nav-h) + 24px);font-size:14px}
.toc-title{font-size:13px;color:var(--tx-3);font-weight:700;letter-spacing:1px;margin-bottom:10px}
.art-toc nav{display:flex;flex-direction:column;gap:6px;border-left:1px solid var(--line);padding-left:14px}
.art-toc nav a{color:var(--tx-2);transition:color .2s;font-size:14px}
.art-toc nav a:hover{color:var(--pri)}
#tocNav a.active{color:var(--pri);font-weight:600}
.art-toc nav a.lv3{padding-left:12px;font-size:13px;color:var(--tx-3)}

.art-main{min-width:0}
.art-tags{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin:32px 0 20px;padding-top:20px;border-top:1px solid var(--line)}
.art-tags .toc-title{margin:0}
.art-share{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;font-size:14px}
.art-nav{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:28px 0}
.art-nav-item{
  display:flex;flex-direction:column;gap:4px;padding:16px 18px;border:1px solid var(--line);
  border-radius:var(--r);background:#fff;transition:border-color .25s,transform .25s var(--ease),box-shadow .25s;
}
a.art-nav-item:hover{border-color:var(--pri);transform:translateY(-2px);box-shadow:var(--sh)}
.art-nav-item small{font-size:12px;color:var(--tx-3)}
.art-nav-item span{font-size:15px;font-weight:600;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.art-nav-item.is-next{text-align:right}
.art-nav-item.is-empty{opacity:.55}
.cta-inline{
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  margin-top:36px;padding:28px;border-radius:var(--r-lg);
  background:linear-gradient(120deg,#eef2ff,#f5f3ff);border:1px solid var(--line);
}
.cta-inline h3{font-size:19px;margin-bottom:6px}
.cta-inline p{color:var(--tx-2);font-size:14px;margin:0}
.related-title{font-size:22px;margin-bottom:24px}

/* ---------- Markdown 正文 ---------- */
.md-body{font-size:16.5px;line-height:1.85;color:#374151}
.md-body h2{
  font-size:23px;margin:38px 0 14px;padding-left:14px;border-left:4px solid var(--pri);scroll-margin-top:90px;color:var(--tx);
}
.md-body h3{font-size:19px;margin:28px 0 12px;color:var(--pri-2);scroll-margin-top:90px}
.md-body h4{font-size:17px;margin:22px 0 10px;color:var(--tx)}
.md-body p{margin:0 0 16px}
.md-body ul,.md-body ol{margin:0 0 18px;padding-left:24px}
.md-body ul{list-style:disc}
.md-body ol{list-style:decimal}
.md-body li{margin-bottom:8px}
.md-body li::marker{color:var(--pri)}
.md-body a{color:var(--pri);border-bottom:1px solid rgba(37,99,235,.35);transition:color .2s,border-color .2s}
.md-body a:hover{color:var(--pri-2);border-color:var(--pri-2)}
.md-body strong{color:var(--tx);font-weight:700}
.md-body blockquote{
  margin:20px 0;padding:16px 20px;border-left:3px solid var(--acc);border-radius:0 10px 10px 0;
  background:#f5f3ff;color:var(--tx-2);
}
.md-body blockquote p:last-child{margin:0}
.md-body hr{border:none;border-top:1px solid var(--line);margin:32px 0}
.md-body code{
  padding:2px 6px;border-radius:6px;background:var(--hover);
  font-family:ui-monospace,Consolas,Monaco,monospace;font-size:.9em;color:#b45309;
}
.md-body pre{
  margin:20px 0;padding:18px;border-radius:12px;overflow-x:auto;
  background:#f8fafc;border:1px solid var(--line);
}
.md-body pre code{background:none;padding:0;color:#334155;font-size:14px}
.md-body img{border-radius:12px;margin:20px 0}
.md-body .md-table{overflow-x:auto;margin:20px 0}
.md-body table{border-collapse:collapse;width:100%;font-size:15px;min-width:420px}
.md-body th,.md-body td{padding:11px 14px;border:1px solid var(--line);text-align:left}
.md-body th{background:var(--active);font-weight:700;color:var(--tx)}
.md-body tbody tr:nth-child(even){background:#fafafa}

/* ---------- 分页 / 标签 / 空态 ---------- */
.pager{display:flex;justify-content:center;align-items:center;gap:18px;margin-top:36px;flex-wrap:wrap}
.pager-info{font-size:14px;color:var(--tx-3)}
.chip-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:28px}
.chip-row.center{justify-content:center}
.chip{
  padding:7px 16px;border-radius:999px;border:1px solid var(--line-2);
  font-size:14px;color:var(--tx-2);background:#fff;transition:all .25s;
}
.chip:hover{border-color:var(--pri);color:var(--pri);background:var(--active)}
.chip.is-on{background:var(--grad);color:#fff;border-color:transparent}
.empty{text-align:center;padding:60px 20px;color:var(--tx-2)}
.empty .btn{margin-top:16px}
.search-count{margin-bottom:20px;color:var(--tx-2)}
.search-count b{color:var(--pri)}

/* ---------- 页脚 ---------- */
.footer{border-top:1px solid var(--line);background:#fff;padding:52px 0 92px}
.footer-grid{display:grid;grid-template-columns:1.6fr repeat(4,1fr);gap:32px}
.footer-col h4{font-size:15px;margin-bottom:14px;color:var(--tx)}
.footer-col a{display:block;padding:5px 0;font-size:14px;color:var(--tx-3);transition:color .2s}
.footer-col a:hover{color:var(--pri)}
.footer-col p{margin:0 0 8px;font-size:14px}
.footer-desc{color:var(--tx-3);font-size:14px;margin:16px 0}
.status-line{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--tx-3)}
.dot{width:8px;height:8px;border-radius:50%;display:inline-block;flex:0 0 8px}
.dot-on{background:var(--green);box-shadow:0 0 0 3px rgba(22,163,74,.18);animation:pulse 2s infinite}
.dot-off{background:var(--orange);box-shadow:0 0 0 3px rgba(234,88,12,.16)}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.45}}
.footer-bottom{
  margin-top:32px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:13px;color:var(--tx-3);
}
.footer-bottom p{margin:0}

/* ---------- 移动端底栏 ---------- */
.mobile-bar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:55;
  background:rgba(255,255,255,.96);backdrop-filter:blur(12px);border-top:1px solid var(--line);
  padding:8px 6px calc(8px + env(safe-area-inset-bottom));
  box-shadow:0 -2px 12px rgba(15,23,42,.06);
}
.mobile-bar a{flex:1;text-align:center;font-size:12px;color:var(--tx-3);padding:6px 2px}
.mobile-bar .mb-primary{
  color:#fff;font-weight:700;border-radius:999px;background:var(--grad);padding:9px 8px;
}

/* ============================================================
   视觉特效层
   硬约束：只动 transform / opacity / background-position，
   不碰 width/height/top/left，避免逐帧触发布局重排（2M 弱网也能满帧）。
   所有效果在 prefers-reduced-motion 下由开头的全局规则一次性关停。
   ============================================================ */

/* 1) 顶部阅读进度条：scaleX 走合成层，JS 每帧只改一个变量 */
.progress{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;z-index:2;
  background:var(--grad);transform:scaleX(var(--p,0));transform-origin:0 50%;
  will-change:transform;pointer-events:none;
}

/* 2) 光标聚光灯：跟随鼠标的径向高光，--mx/--my 由 JS 写入 */
.spot::before{
  content:"";position:absolute;inset:0;pointer-events:none;border-radius:inherit;
  background:radial-gradient(300px circle at var(--mx,50%) var(--my,0%),
             rgba(37,99,235,.11),rgba(124,58,237,.05) 45%,transparent 68%);
  opacity:0;transition:opacity .35s var(--ease);
}
.spot:hover::before{opacity:1}

/* 3) 渐变标题流光：只动 background-position（纯绘制，不重排） */
.grad{
  background:var(--grad);background-size:220% 100%;
  -webkit-background-clip:text;background-clip:text;color:transparent;
  animation:shine 9s var(--ease) infinite;
}
@keyframes shine{0%,100%{background-position:0% 50%}50%{background-position:100% 50%}}

/* 4) 主按钮掠光：hover 时一道高光扫过 */
.btn-primary{position:relative;overflow:hidden}
.btn-primary::after{
  content:"";position:absolute;top:-50%;bottom:-50%;left:0;width:45%;pointer-events:none;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.42),transparent);
  transform:translateX(-160%) skewX(-18deg);
}
.btn-primary:hover::after{animation:sheen .85s var(--ease)}
@keyframes sheen{
  from{transform:translateX(-160%) skewX(-18deg)}
  to{transform:translateX(420%) skewX(-18deg)}
}

/* 5) 步骤连接线：画在序号徽章之后，徽章自身背景会盖住它，形成"串起来"的效果 */
.steps{position:relative}
.steps::before{
  content:"";position:absolute;top:1px;left:45px;right:45px;height:2px;
  background:linear-gradient(90deg,var(--pri),var(--acc));opacity:.28;
}

/* 6) Hero 视差：JS 按滚动量写 --py，移动端与降级场景不启用 */
.hero-art img,.hero-glow{transform:translate3d(0,var(--py,0px),0)}
.hero-glow{transition:transform .1s linear}

/* 7) Hero 插画：入场后接一段极缓的上下浮动，静态图也有呼吸感 */
.hero-art img{animation:artIn 1.1s var(--ease) both,artFloat 7s ease-in-out 1.2s infinite}
@keyframes artFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}

/* 8) FAQ 展开：原生 details 无法过渡高度，用入场动画补足观感 */
.faq-item{transition:border-color .3s,box-shadow .3s}
.faq-item[open]{border-color:#a5b4fc;box-shadow:0 6px 18px rgba(37,99,235,.08)}
.faq-item[open] .faq-body{animation:faqIn .34s var(--ease)}
@keyframes faqIn{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}

/* 9) 导航滚动高亮（scrollspy） */
.nav-menu a.is-active{color:var(--pri);background:var(--active);font-weight:600}

/* 10) 锚点目标的轻微上浮提示：从导航点进来时能立刻定位到被点区块 */
.section:target,.hero:target{animation:targetFlash 1.2s var(--ease)}
@keyframes targetFlash{0%{background-color:rgba(37,99,235,.07)}100%{background-color:transparent}}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .footer-grid{grid-template-columns:1fr 1fr 1fr}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .art-wrap{grid-template-columns:1fr;gap:24px}
  .art-toc{display:none}
}
@media (max-width:900px){
  .nav-menu,.nav-cta{display:none}
  .nav-toggle{display:block;margin-left:auto}
  .nav.is-open .nav-menu{
    display:flex;flex-direction:column;position:absolute;top:var(--nav-h);left:0;right:0;
    background:#fff;border-bottom:1px solid var(--line);padding:12px 20px 18px;gap:2px;
    box-shadow:0 8px 24px rgba(15,23,42,.08);
  }
  .nav.is-open .nav-cta{display:flex;position:absolute;top:calc(var(--nav-h) + 200px);left:20px;right:20px}
  .hero-inner{grid-template-columns:1fr;gap:28px}
  .hero-art{order:-1;max-width:460px;margin-inline:auto}
  .stats{grid-template-columns:repeat(2,1fr)}
  .grid-3,.grid-2,.steps,.contact-grid{grid-template-columns:1fr}
  .steps::before{display:none}          /* 单列纵向排列时连接线没有意义 */
  .hero-art img,.hero-glow{transform:none}  /* 小屏不跑视差，省电省帧 */
  .field-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer{padding-bottom:80px}
  .mobile-bar{display:flex}
}
@media (max-width:640px){
  .wrap,.wrap-narrow{width:calc(100% - 28px)}
  .section{padding:52px 0}
  .hero{padding:36px 0 36px}
  .hero-actions .btn{flex:1;min-width:150px;justify-content:center}
  .grid-4{grid-template-columns:1fr}
  .post-row{flex-direction:column;gap:14px;padding:20px}
  .post-row-cover,.post-row-cover img{width:100%;height:150px}
  .art-nav{grid-template-columns:1fr}
  .art-nav-item.is-next{text-align:left}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
  .md-body{font-size:16px}
}