:root{
  --brand:#16d5ae; --brand-2:#1ac9ae; --brand-deep:#0ea98a;
  --orange:#ff6b09;
  --ink:#272c40; --text:#3f445c; --muted:#6d7392;
  --bg:#ffffff; --bg-soft:#f9f9f9; --bg-tint:#f2fbfa;
  --card:#ffffff; --border:#e7ebf4; --border-soft:#eef1f7;
  --brand-tint:rgba(22,213,174,.10); --brand-tint-2:rgba(22,213,174,.16);
  --shadow-sm:0 2px 10px rgba(39,44,64,.06);
  --shadow-md:0 10px 34px rgba(39,44,64,.10);
  --shadow-brand:0 12px 30px rgba(22,213,174,.28);
  --nav-bg:rgba(255,255,255,.82);
  --grad:linear-gradient(135deg,#16d5ae 0%,#1ac9ae 100%);
  --hair:rgba(22,213,174,.35);
  --code-bg:#1d2233; --code-fg:#aef2e0;
  --radius:16px;
}
@media (prefers-color-scheme:dark){
  :root{
    --ink:#edf1f8; --text:#c9d0e2; --muted:#8f96b3;
    --bg:#10141f; --bg-soft:#141927; --bg-tint:#131a26;
    --card:#171d2e; --border:#253050; --border-soft:#1f2740;
    --brand-tint:rgba(22,213,174,.14); --brand-tint-2:rgba(22,213,174,.20);
    --shadow-sm:0 2px 12px rgba(0,0,0,.35);
    --shadow-md:0 12px 38px rgba(0,0,0,.45);
    --nav-bg:rgba(16,20,31,.78);
    --code-bg:#0d1119; --code-fg:#8df0d6;
  }
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;color:var(--text);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:var(--bg);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  font-size:16px;line-height:1.7;overflow-x:hidden;
}
img{max-width:100%}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{color:var(--ink);line-height:1.35;margin:0 0 .6em;letter-spacing:.01em}
p{margin:0 0 1em}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
section{scroll-margin-top:84px}
.section{padding:104px 0}
.section.soft{background:var(--bg-soft)}
.mono{font-family:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,"Courier New",monospace}

/* ---------- reveal：入场动画纯增强，不预置任何隐藏状态 ----------
   元素始终以最终样式渲染、内容不可被动画持续隐藏；仅在进入视口时
   加上 .in 播放一次 rise-in 入场动画。观察器缺失、JS 异常或无滚动
   的全页捕获下，内容依然完整可见。 */
.reveal.in{animation:rise-in .7s cubic-bezier(.22,.61,.36,1) both;animation-delay:var(--d,0s)}
@keyframes rise-in{from{opacity:0;transform:translateY(26px)}to{opacity:1;transform:none}}
[data-flash]{display:inline-block}
[data-flash].lit{animation:numlit 1.2s cubic-bezier(.22,.61,.36,1)}
@keyframes numlit{0%{transform:scale(1.14);filter:saturate(1.6) brightness(1.1)}100%{transform:scale(1)}}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  *{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:100;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  background:var(--nav-bg);border-bottom:1px solid var(--border-soft);transition:box-shadow .3s}
.nav.scrolled{box-shadow:var(--shadow-sm)}
.nav-inner{max-width:1240px;margin:0 auto;padding:0 24px;height:70px;display:flex;align-items:center;gap:34px}
.logo{display:flex;align-items:center;gap:11px;flex-shrink:0}
.logo-mark{width:36px;height:36px;border-radius:10px;background:var(--grad);color:#fff;display:grid;place-items:center;
  font-size:19px;font-weight:700;box-shadow:0 4px 14px rgba(22,213,174,.35)}
.logo-txt{line-height:1.2}
.logo-txt b{display:block;font-size:17px;color:var(--ink);letter-spacing:.04em}
.logo-txt span{display:block;font-size:11px;color:var(--muted);letter-spacing:.12em}
.nav-links{display:flex;gap:30px;margin-left:8px}
.nav-links a{font-size:15px;color:var(--text);position:relative;padding:6px 0;transition:color .2s}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;border-radius:2px;background:var(--brand);transition:width .25s}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after{width:100%}
.nav-cta{margin-left:auto;display:flex;align-items:center;gap:18px}
.login{font-size:15px;color:var(--text)}
.login:hover{color:var(--brand-deep)}
.hamburger{display:none;background:none;border:1px solid var(--border);border-radius:10px;width:42px;height:42px;
  cursor:pointer;color:var(--ink);align-items:center;justify-content:center}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:16px;font-weight:600;
  border-radius:12px;padding:14px 30px;cursor:pointer;transition:transform .18s,box-shadow .25s,background .2s;white-space:nowrap;border:1px solid transparent}
.btn-primary{background:var(--grad);color:#fff;box-shadow:var(--shadow-brand)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 36px rgba(22,213,174,.38)}
.btn-ghost{background:var(--card);color:var(--ink);border-color:var(--border)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-deep);transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.btn-sm{padding:10px 22px;font-size:14px;border-radius:10px}
.btn .arr{font-weight:700}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding:72px 0 88px;background:
  radial-gradient(700px 320px at 88% -40px,var(--brand-tint),transparent 62%),
  radial-gradient(560px 380px at -8% 120%,var(--brand-tint),transparent 60%),var(--bg)}
.hero::before{content:"";position:absolute;inset:0;
  background-image:linear-gradient(var(--border-soft) 1px,transparent 1px),linear-gradient(90deg,var(--border-soft) 1px,transparent 1px);
  background-size:44px 44px;mask-image:radial-gradient(800px 480px at 70% 30%,#000 30%,transparent 78%);
  -webkit-mask-image:radial-gradient(800px 480px at 70% 30%,#000 30%,transparent 78%);opacity:.7;pointer-events:none}
.hero-grid{position:relative;display:grid;grid-template-columns:1.02fr .98fr;gap:56px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:13px;font-weight:600;color:var(--brand-deep);
  background:var(--brand-tint);border:1px solid var(--brand-tint-2);border-radius:999px;padding:7px 16px 7px 10px;margin-bottom:22px}
.eyebrow .dot{width:8px;height:8px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 4px var(--brand-tint-2);animation:blink 2.2s infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.45}}
.hero h1{font-size:clamp(32px,4.4vw,48px);font-weight:800;margin-bottom:20px}
.hero h1 .hl{position:relative;color:var(--brand-deep);white-space:nowrap}
.hero h1 .hl::after{content:"";position:absolute;left:0;right:0;bottom:6px;height:.28em;z-index:-1;border-radius:3px;
  background:linear-gradient(90deg,rgba(22,213,174,.35),rgba(26,201,174,.18))}
.hero-sub{font-size:17.5px;color:var(--muted);max-width:34em;margin-bottom:12px}
.hero-sub b{color:var(--text);font-weight:600}
.hero-cta{display:flex;gap:14px;margin:30px 0 26px;flex-wrap:wrap}
.trust-row{display:flex;gap:26px;flex-wrap:wrap;font-size:14px;color:var(--muted)}
.trust-row span{display:inline-flex;align-items:center;gap:7px}
.tick{width:18px;height:18px;flex-shrink:0;display:inline-grid;place-items:center;border-radius:50%;background:var(--brand-tint);
  color:var(--brand-deep);font-size:11px;font-weight:800}

/* ---------- dashboard mock ---------- */
.dash{position:relative;border-radius:22px;background:var(--card);border:1px solid var(--border);
  box-shadow:var(--shadow-md),inset 0 1px 0 rgba(255,255,255,.5);padding:0;animation:floaty 7s ease-in-out infinite}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px)}}
.dash-head{display:flex;align-items:center;gap:10px;padding:16px 20px;border-bottom:1px solid var(--border-soft)}
.dash-head .win{display:flex;gap:6px}
.dash-head .win i{width:10px;height:10px;border-radius:50%;background:var(--border);display:block}
.dash-head .win i:first-child{background:#ff5f57}
.dash-head .win i:nth-child(2){background:#febc2e}
.dash-head .win i:nth-child(3){background:#28c840}
.dash-title{font-size:13.5px;font-weight:600;color:var(--ink)}
.dash-live{margin-left:auto;flex-shrink:0;font-size:12px;color:var(--brand-deep);display:inline-flex;align-items:center;gap:6px;
  background:var(--brand-tint);border-radius:999px;padding:4px 11px;white-space:nowrap}
.dash-live i{width:7px;height:7px;border-radius:50%;background:var(--brand);animation:blink 1.8s infinite}
.kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;padding:18px 20px 6px}
.kpi{background:var(--bg-soft);border:1px solid var(--border-soft);border-radius:13px;padding:12px 14px}
.kpi .k{font-size:11.5px;color:var(--muted);margin-bottom:4px}
.kpi .v{font-size:21px;font-weight:800;color:var(--ink);font-variant-numeric:tabular-nums}
.kpi .d{font-size:11px;color:var(--brand-deep);font-weight:600}
.kpi .d.warn{color:var(--orange)}
.chart-box{padding:10px 16px 4px}
.chart-cap{display:flex;justify-content:space-between;align-items:center;padding:0 20px 4px;font-size:11.5px;color:var(--muted)}
.legend{display:flex;gap:14px}
.legend i{display:inline-block;width:9px;height:9px;border-radius:3px;margin-right:5px}
.dash-cap{padding:6px 20px 16px;font-size:11.5px;color:var(--muted);display:flex;justify-content:space-between;align-items:center}
.dash-cap .tag{border:1px dashed var(--border);border-radius:8px;padding:2px 9px;font-size:11px}
.toast{position:absolute;background:var(--card);border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow-md);
  padding:11px 15px;display:flex;gap:10px;align-items:center;font-size:13px;animation:floaty 5.5s ease-in-out infinite}
.toast .ic{width:32px;height:32px;border-radius:10px;display:grid;place-items:center;flex-shrink:0}
.toast b{color:var(--ink);font-weight:700}
.toast small{display:block;color:var(--muted);font-size:11.5px}
.toast.t1{top:64px;right:-26px;animation-delay:-2s}
.toast.t1 .ic{background:var(--brand-tint);color:var(--brand-deep)}
.toast.t2{bottom:64px;left:-30px}
.toast.t2 .ic{background:rgba(255,107,9,.12);color:var(--orange)}
.toast .mono{font-size:11px}
@media (max-width:560px){.toast.t1{right:6px}.toast.t2{left:6px}}

/* ---------- stats band ---------- */
.stats{border-top:1px solid var(--border-soft);border-bottom:1px solid var(--border-soft);background:var(--card)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);padding:0}
.stat{padding:34px 26px;text-align:center;position:relative}
.stat+.stat::before{content:"";position:absolute;left:0;top:26%;bottom:26%;width:1px;background:var(--border-soft)}
.stat .num{font-size:38px;font-weight:800;color:var(--ink);font-variant-numeric:tabular-nums;letter-spacing:.01em}
.stat .num .s{font-size:22px;color:var(--brand-deep);font-weight:700}
.stat .lbl{font-size:13.5px;color:var(--muted);margin-top:4px}

/* ---------- section heads ---------- */
.sec-head{max-width:46em;margin:0 auto 56px;text-align:center}
.sec-head h2{font-size:clamp(26px,3.2vw,36px);font-weight:800}
.sec-head p{color:var(--muted);font-size:17px;margin:0}
.kicker{display:inline-block;font-size:13px;font-weight:700;color:var(--brand-deep);letter-spacing:.18em;margin-bottom:14px}

/* ---------- pain ---------- */
.pain-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.pain{position:relative;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:34px 30px 30px;overflow:hidden;transition:transform .25s,box-shadow .25s,border-color .25s}
.pain:hover{transform:translateY(-6px);box-shadow:var(--shadow-md);border-color:var(--brand-tint-2)}
.pain::after{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--grad);opacity:0;transition:opacity .3s}
.pain:hover::after{opacity:1}
.pain .ghost{position:absolute;right:14px;top:8px;font-size:74px;font-weight:800;color:var(--brand-tint);line-height:1;user-select:none;pointer-events:none}
.pain .ic{width:52px;height:52px;border-radius:15px;display:grid;place-items:center;margin-bottom:18px;
  background:var(--brand-tint);color:var(--brand-deep)}
.pain h3{font-size:18px;margin-bottom:10px;padding-right:56px}
.pain p{font-size:14.5px;color:var(--muted);margin:0}
.pain .relief{margin-top:16px;font-size:13.5px;color:var(--brand-deep);font-weight:600;display:flex;align-items:center;gap:7px}

/* ---------- how / flow (core visual) ---------- */
.how{background:
  radial-gradient(900px 420px at 50% 0,var(--brand-tint),transparent 65%),var(--bg-soft)}
.flow-stage{position:relative;padding:8px 0 0}
.flow-row{display:flex;align-items:flex-start;margin-bottom:6px}
.fnode{width:196px;flex-shrink:0;text-align:center;position:relative;cursor:pointer;z-index:2}
.fnode .ring{width:92px;height:92px;margin:0 auto;border-radius:50%;background:var(--card);border:2px solid var(--border);
  display:grid;place-items:center;color:var(--muted);position:relative;
  transition:transform .3s,border-color .35s,box-shadow .35s,color .3s,background .3s}
.fnode .ring svg{width:38px;height:38px}
.fnode .n{position:absolute;top:-6px;right:-6px;width:30px;height:30px;border-radius:50%;background:var(--card);
  border:2px solid var(--border);color:var(--muted);font-size:13px;font-weight:800;display:grid;place-items:center;transition:all .3s}
.fnode .t{font-size:16.5px;font-weight:700;color:var(--ink);margin:16px 0 6px}
.fnode .d{font-size:13px;color:var(--muted);line-height:1.6}
.fconn{flex:1;min-width:18px;height:92px;position:relative}
.fconn::before{content:"";position:absolute;top:45px;left:6px;right:calc(100% - 6px);height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));transition:right .9s cubic-bezier(.4,0,.2,1)}
.fconn::after{content:"";position:absolute;top:calc(45px - 4px);right:9px;border-left:9px solid var(--brand);
  border-top:5px solid transparent;border-bottom:5px solid transparent;opacity:0;transform:translateX(-8px);transition:opacity .4s .55s,transform .4s .55s}
.fconn .base{position:absolute;top:45px;left:6px;right:6px;height:2px;background:var(--border);border-radius:2px}
.fconn .pulse{position:absolute;top:calc(45px - 3px);left:6px;width:8px;height:8px;border-radius:50%;
  background:var(--brand);opacity:0;box-shadow:0 0 12px var(--brand)}
.flow-dot{position:relative}
.fconn.go::before{right:6px}
.fconn.go::after{opacity:1;transform:none}
.fconn.go .pulse{opacity:1;animation:travel 1.6s linear infinite}
@keyframes travel{from{left:6px}to{left:calc(100% - 14px)}}
.fnode.active .ring,.fnode.done .ring{border-color:var(--brand);color:var(--brand-deep);
  box-shadow:0 0 0 8px var(--brand-tint),var(--shadow-md);transform:scale(1.06)}
.fnode.active .ring{background:var(--grad);color:#fff}
.fnode.active .n{background:var(--brand);border-color:var(--brand);color:#fff}
.fnode.done .n{background:var(--brand-tint);border-color:var(--brand);color:var(--brand-deep)}
.loop-wrap{position:relative;height:130px;margin-top:-6px}
.loop-svg{position:absolute;inset:0;width:100%;height:100%;overflow:visible}
.loop-label{position:absolute;left:50%;bottom:2px;transform:translateX(-50%);display:inline-flex;align-items:center;gap:9px;
  background:var(--card);border:1px solid var(--brand-tint-2);color:var(--brand-deep);font-size:13.5px;font-weight:700;
  border-radius:999px;padding:9px 20px;box-shadow:var(--shadow-sm);opacity:0;transition:opacity .8s .3s;white-space:nowrap}
.flow-stage.looped .loop-label{opacity:1}
.loop-dot{position:absolute;left:0;right:0;text-align:center}
.flow-detail{max-width:760px;margin:26px auto 0;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:26px 30px;box-shadow:var(--shadow-md);display:flex;gap:22px;align-items:flex-start;min-height:130px}
.flow-detail .idx{flex-shrink:0;width:52px;height:52px;border-radius:15px;background:var(--grad);color:#fff;
  display:grid;place-items:center;font-size:20px;font-weight:800;box-shadow:0 6px 18px rgba(22,213,174,.35)}
.flow-detail h3{font-size:18px;margin-bottom:6px}
.flow-detail p{font-size:14.5px;color:var(--muted);margin:0}
.flow-detail .code{margin:12px 0 0;background:var(--code-bg);color:var(--code-fg);border-radius:10px;
  padding:9px 14px;font-size:12.5px;display:inline-block}
.loop-pill{display:none;align-items:center;gap:8px;justify-content:center;margin:10px auto 0;font-size:13.5px;
  color:var(--brand-deep);font-weight:700;background:var(--brand-tint);border-radius:999px;padding:10px 20px;width:max-content}

/* ---------- matrix ---------- */
.mx{display:grid;grid-template-columns:148px repeat(4,1fr);border:1px solid var(--border);border-radius:18px;
  overflow:hidden;background:var(--card);box-shadow:var(--shadow-md);max-width:920px;margin:0 auto}
.mx>div{padding:22px 18px;text-align:center;display:flex;align-items:center;justify-content:center;gap:9px;font-size:15px}
.mx .r,.mx .c{padding:16px 18px}
.mx .h{background:var(--bg-soft);font-weight:700;color:var(--ink);border-bottom:1px solid var(--border)}
.mx .h.brand-h{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;border-radius:0}
.mx .r{font-weight:700;color:var(--ink);background:var(--bg-tint)}
.mx .c{border-bottom:1px solid var(--border-soft);border-left:1px solid var(--border-soft)}
.mx .c:last-of-type{border-bottom:none}
.mx .chk{width:30px;height:30px;border-radius:50%;background:var(--grad);color:#fff;display:grid;place-items:center;
  font-size:14px;font-weight:800;box-shadow:0 4px 12px rgba(22,213,174,.35)}
.mx .more{color:var(--muted);font-size:13.5px;flex-direction:column;gap:4px}
.mx .dots{display:flex;gap:5px}
.mx .dots i{width:6px;height:6px;border-radius:50%;background:var(--brand);opacity:.5;animation:blink 1.6s infinite}
.mx .dots i:nth-child(2){animation-delay:.25s}.mx .dots i:nth-child(3){animation-delay:.5s}
.mx-cap{text-align:center;color:var(--muted);font-size:14px;margin-top:22px}
.mx-cap b{color:var(--brand-deep)}

/* ---------- strategy engine ---------- */
.str-grid{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:start;margin-top:6px}
.str-lead{font-size:16.5px;color:var(--muted)}
.str-lead b{color:var(--brand-deep)}
.str-list{display:grid;gap:13px;margin-top:26px}
.str-item{display:flex;gap:15px;align-items:flex-start;background:var(--card);border:1px solid var(--border);
  border-radius:15px;padding:16px 19px;transition:transform .22s,box-shadow .22s,border-color .22s}
.str-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm);border-color:var(--brand-tint-2)}
.str-item .ic{width:44px;height:44px;border-radius:13px;flex-shrink:0;display:grid;place-items:center;
  background:var(--brand-tint);color:var(--brand-deep)}
.str-item h3{font-size:16.5px;margin:0 0 4px}
.str-item p{font-size:13.8px;color:var(--muted);margin:0;line-height:1.6}
.str-boost{margin-top:16px;background:linear-gradient(135deg,var(--brand-tint),transparent 65%),var(--card);
  border:1.5px dashed var(--hair);border-radius:15px;padding:18px 20px;display:flex;gap:15px;align-items:flex-start}
.str-boost .ic{width:44px;height:44px;border-radius:13px;flex-shrink:0;display:grid;place-items:center;
  background:var(--grad);color:#fff;box-shadow:0 6px 16px rgba(22,213,174,.3)}
.str-boost h3{font-size:16px;margin:0 0 4px;color:var(--brand-deep)}
.str-boost p{font-size:13.8px;color:var(--muted);margin:0;line-height:1.6}
.console{background:var(--card);border:1px solid var(--border);border-radius:20px;box-shadow:var(--shadow-md);
  overflow:hidden;position:sticky;top:96px}
.console-head{display:flex;align-items:center;gap:11px;padding:16px 22px;border-bottom:1px solid var(--border-soft)}
.console-head .win{display:flex;gap:6px}
.console-head .win i{width:10px;height:10px;border-radius:50%;background:var(--border);display:block}
.console-title{font-size:14.5px;font-weight:700;color:var(--ink)}
.console-live{margin-left:auto;font-size:12px;font-weight:600;color:var(--brand-deep);display:inline-flex;align-items:center;gap:6px;
  background:var(--brand-tint);border-radius:999px;padding:4px 12px;white-space:nowrap}
.console-live i{width:7px;height:7px;border-radius:50%;background:var(--brand);animation:blink 1.8s infinite}
.c-row{padding:16px 22px;border-bottom:1px solid var(--border-soft)}
.c-row:last-child{border-bottom:none}
.c-lbl{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:11px}
.c-lbl b{font-size:14px;color:var(--ink)}
.c-lbl small{font-size:12px;color:var(--muted);white-space:nowrap}
.seg{display:flex;background:var(--bg-soft);border:1px solid var(--border-soft);border-radius:12px;padding:4px;gap:4px}
.seg .opt{flex:1;border:none;background:transparent;color:var(--muted);font-family:inherit;font-size:13px;font-weight:600;border-radius:9px;
  padding:8px 4px;cursor:pointer;transition:background .2s,color .2s,box-shadow .2s}
.seg .opt.on{background:var(--card);color:var(--brand-deep);box-shadow:var(--shadow-sm)}
.chips{display:flex;gap:8px;flex-wrap:wrap}
.chip{font-family:inherit;font-size:12.5px;font-weight:600;border-radius:999px;padding:6px 14px;border:1.5px solid var(--border);
  color:var(--muted);background:var(--card);cursor:pointer;transition:border-color .2s,color .2s,background .2s}
.chip.on{background:var(--brand-tint);border-color:var(--brand);color:var(--brand-deep)}
.slider{position:relative;height:30px}
.slider .track,.slider .fill{position:absolute;top:12px;left:0;height:6px;border-radius:3px}
.slider .track{right:0;background:var(--border-soft)}
.slider .fill{width:80%;background:var(--grad)}
.slider .knob{position:absolute;top:6px;left:80%;width:18px;height:18px;border-radius:50%;background:#fff;
  border:3px solid var(--brand);box-shadow:0 2px 8px rgba(22,213,174,.4);margin-left:-9px}
.c-meta{font-size:13px;color:var(--text)}
.c-meta b{color:var(--ink)}
.c-foot{display:flex;justify-content:space-between;align-items:center;gap:16px}
.c-foot .note{font-size:12px;color:var(--muted);margin-top:3px}
.sw{width:50px;height:29px;border-radius:999px;border:none;background:var(--brand);cursor:pointer;position:relative;flex-shrink:0;
  transition:background .25s;font-family:inherit;padding:0}
.sw::after{content:"";position:absolute;top:3px;left:calc(100% - 26px);width:23px;height:23px;border-radius:50%;background:#fff;
  box-shadow:0 2px 6px rgba(0,0,0,.2);transition:left .25s}
.sw[aria-pressed="false"]{background:var(--border)}
.sw[aria-pressed="false"]::after{left:3px}
.console button:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.vs-row{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin:52px auto 0;max-width:980px}
.vs{background:var(--card);border:1px solid var(--border);border-radius:18px;padding:30px 32px}
.vs.hl{border:1.5px solid var(--brand);box-shadow:var(--shadow-brand)}
.vs .vtag{font-size:12px;font-weight:800;letter-spacing:.14em;margin-bottom:12px;color:var(--muted)}
.vs.hl .vtag{color:var(--brand-deep)}
.vs h3{font-size:19px;margin-bottom:12px}
.vs ul{list-style:none;margin:0;padding:0}
.vs li{font-size:14.5px;padding:9px 0;display:flex;gap:10px;align-items:flex-start;border-top:1px dashed var(--border-soft)}
.vs li:first-child{border-top:none}
.vs li span:first-child{flex-shrink:0}
.vs .x{color:#e5484d;font-weight:800}

/* ---------- guardian ---------- */
.guard-grid{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}
.mon{background:var(--card);border:1px solid var(--border);border-radius:20px;box-shadow:var(--shadow-md);overflow:hidden}
.mon-head{display:flex;align-items:center;gap:10px;padding:16px 22px;border-bottom:1px solid var(--border-soft)}
.mon-title{font-size:14.5px;font-weight:700;color:var(--ink)}
.mon-live{margin-left:auto;font-size:12px;font-weight:600;color:var(--brand-deep);display:inline-flex;align-items:center;gap:6px;
  background:var(--brand-tint);border-radius:999px;padding:4px 12px;white-space:nowrap}
.mon-live i{width:7px;height:7px;border-radius:50%;background:var(--brand);animation:blink 1.8s infinite}
.tl{padding:8px 22px 4px}
.tl-item{display:grid;grid-template-columns:26px 1fr;gap:10px;position:relative;padding:11px 0}
.tl-item:not(:last-child)::before{content:"";position:absolute;left:12.5px;top:37px;bottom:-6px;width:2px;border-radius:2px;background:var(--border-soft)}
.tl-dot{width:13px;height:13px;border-radius:50%;margin:5px 0 0 6.5px;position:relative;z-index:1}
.tl-dot.g{background:var(--brand);box-shadow:0 0 0 4px var(--brand-tint)}
.tl-dot.o{background:var(--orange);box-shadow:0 0 0 4px rgba(255,107,9,.14)}
.tl-item .tt{font-size:13.5px;color:var(--ink);line-height:1.55}
.tl-item .tt small{display:block;color:var(--muted);font-size:12.5px;margin-top:2px}
.tl-item .time{font-size:11.5px;color:var(--muted);font-variant-numeric:tabular-nums}
.pill{font-size:11px;font-weight:700;border-radius:999px;padding:2px 10px;margin-left:8px;white-space:nowrap}
.pill.warn{background:rgba(255,107,9,.12);color:var(--orange)}
.pill.ok{background:var(--brand-tint);color:var(--brand-deep)}
.mon-foot{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--border-soft);margin-top:12px}
.mon-foot>div{padding:15px 10px;text-align:center}
.mon-foot>div+div{border-left:1px solid var(--border-soft)}
.mon-foot b{display:block;font-size:18px;color:var(--ink);font-variant-numeric:tabular-nums}
.mon-foot small{font-size:11.5px;color:var(--muted)}
.guard-feats{display:grid;gap:20px;margin-top:6px}
.guard-feat{display:flex;gap:15px}
.guard-feat .ic{width:46px;height:46px;border-radius:14px;flex-shrink:0;display:grid;place-items:center;
  background:var(--brand-tint);color:var(--brand-deep);margin-top:2px}
.guard-feat h3{font-size:16.5px;margin:0 0 4px}
.guard-feat p{font-size:14px;color:var(--muted);margin:0;line-height:1.6}
.guard-note{margin-top:24px;background:var(--card);border:1px solid var(--border);border-radius:14px;
  padding:16px 20px;font-size:14px;color:var(--text);display:flex;gap:12px;align-items:flex-start;line-height:1.7}
.guard-note .tick{margin-top:4px;flex-shrink:0}

/* ---------- AI chain ---------- */
.section.tint{background:var(--bg-tint)}
.chain{display:flex;align-items:stretch;max-width:1060px;margin:10px auto 0}
.chain-node{flex:1;background:var(--card);border:1px solid var(--border);border-radius:18px;padding:24px 16px;text-align:center}
.chain-node .ic{width:48px;height:48px;border-radius:14px;display:grid;place-items:center;margin:0 auto 12px;
  background:var(--brand-tint);color:var(--brand-deep)}
.chain-node h3{font-size:16px;margin:0 0 6px}
.chain-node p{font-size:12.8px;color:var(--muted);margin:0;line-height:1.6}
.chain-node.hl{background:linear-gradient(150deg,#1d9980,#0d7d68);border-color:transparent}
.chain-node.hl h3{color:#fff}
.chain-node.hl p{color:rgba(255,255,255,.85)}
.chain-node.hl .ic{background:rgba(255,255,255,.18);color:#fff}
.chain-arrow{flex-shrink:0;display:grid;place-items:center;padding:0 10px;color:var(--brand)}
.chain-cap{display:flex;justify-content:center;gap:10px;align-items:center;max-width:640px;margin:22px auto 0;
  font-size:13.5px;font-weight:600;color:var(--brand-deep);background:var(--brand-tint);
  border-radius:999px;padding:10px 22px;text-align:center;line-height:1.6}
.ai-cards{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:46px}
.ai-card{background:var(--card);border:1px solid var(--border);border-radius:18px;padding:32px;transition:transform .25s,box-shadow .25s}
.ai-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md)}
.ai-card .tag{display:inline-block;font-size:12px;font-weight:700;color:var(--brand-deep);background:var(--brand-tint);
  border-radius:8px;padding:4px 12px;margin-bottom:14px}
.ai-card h3{font-size:20px;margin-bottom:10px}
.ai-card p{font-size:14.5px;color:var(--muted);margin:0 0 6px}
.ai-card ul{margin:12px 0 0;padding:0;list-style:none}
.ai-card ul li{font-size:14px;color:var(--text);padding:7px 0;display:flex;gap:9px;align-items:flex-start;border-top:1px dashed var(--border-soft)}
.ai-card ul li:first-child{border-top:none}

/* ---------- features ---------- */
.feat-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:22px}
.feat{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:32px;position:relative;overflow:hidden;
  transition:transform .25s,box-shadow .25s}
.feat:hover{transform:translateY(-5px);box-shadow:var(--shadow-md)}
.feat.wide{grid-column:span 7;display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:center}
.feat.narrow{grid-column:span 5}
.feat .tag{display:inline-block;font-size:12px;font-weight:700;color:var(--brand-deep);background:var(--brand-tint);
  border-radius:8px;padding:4px 12px;margin-bottom:14px}
.feat h3{font-size:20px;margin-bottom:10px}
.feat p{font-size:14.5px;color:var(--muted);margin:0 0 6px}
.feat ul{margin:12px 0 0;padding:0;list-style:none}
.feat ul li{font-size:14px;color:var(--text);padding:7px 0;display:flex;gap:9px;align-items:flex-start;border-top:1px dashed var(--border-soft)}
.feat ul li:first-child{border-top:none}
.panel{background:var(--bg-soft);border:1px solid var(--border);border-radius:14px;padding:18px;position:relative}
.panel .ph{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);margin-bottom:10px}
.panel .ph b{color:var(--ink)}
.mini-rows{margin-top:12px;display:grid;gap:7px}
.mini-rows .r{display:flex;justify-content:space-between;align-items:center;font-size:12.5px}
.mini-rows .bar{height:7px;border-radius:4px;background:var(--grad);margin-top:4px}
.mini-rows .w{display:block;height:7px;border-radius:4px;background:var(--border-soft)}
.mini-2{grid-column:span 12;display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:22px}

/* ---------- customers ---------- */
.cases-head{display:flex;align-items:flex-end;justify-content:space-between;gap:30px;margin-bottom:46px;flex-wrap:wrap}
.cases-head h2{font-size:clamp(26px,3.2vw,36px);margin:0}
.bignum{display:flex;align-items:baseline;gap:12px}
.bignum .b{font-size:clamp(52px,6vw,76px);font-weight:800;line-height:1;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}
.bignum .t{font-size:15px;color:var(--muted);max-width:12em;line-height:1.6}
.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.quote{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:28px;display:flex;
  flex-direction:column;transition:transform .25s,box-shadow .25s}
.quote:hover{transform:translateY(-5px);box-shadow:var(--shadow-md)}
.quote .stars{color:var(--orange);font-size:14px;letter-spacing:3px;margin-bottom:14px}
.quote .txt{font-size:15px;color:var(--text);flex:1}
.quote .who{display:flex;align-items:center;gap:13px;margin-top:20px;padding-top:18px;border-top:1px solid var(--border-soft)}
.avatar{width:46px;height:46px;border-radius:50%;display:grid;place-items:center;color:#fff;font-size:17px;font-weight:700;flex-shrink:0}
.a1{background:linear-gradient(135deg,#16d5ae,#0a9fd8)}
.a2{background:linear-gradient(135deg,#7c8cf8,#4a5fe7)}
.a3{background:linear-gradient(135deg,#ff9a3d,#ff6b09)}
.who .nm{font-size:14.5px;font-weight:700;color:var(--ink)}
.who .rl{font-size:12.5px;color:var(--muted)}

/* ---------- CTA ---------- */
.cta-band{position:relative;overflow:hidden;border-radius:26px;background:
  linear-gradient(150deg,#1d9980,#0d7d68 60%,#0a6d5c);color:#fff;
  box-shadow:0 24px 70px rgba(13,125,104,.35)}
.cta-band::before{content:"";position:absolute;inset:0;
  background:radial-gradient(500px 300px at 85% 20%,rgba(255,255,255,.18),transparent 60%),
             radial-gradient(600px 400px at 10% 100%,rgba(0,0,0,.18),transparent 60%);pointer-events:none}
.cta-inner{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:44px;padding:64px 60px;align-items:center}
.cta-copy h2{color:#fff;font-size:clamp(26px,3vw,34px);margin-bottom:14px}
.cta-copy p{color:rgba(255,255,255,.82);font-size:16px;margin-bottom:24px;max-width:30em}
.cta-points{list-style:none;margin:0 0 28px;padding:0;display:grid;gap:10px}
.cta-points li{display:flex;gap:10px;align-items:center;font-size:15px;color:rgba(255,255,255,.92)}
.cta-points .tick{background:rgba(255,255,255,.2);color:#fff}
.cta-call{display:flex;align-items:center;gap:14px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);
  border-radius:15px;padding:14px 20px;width:max-content}
.cta-call .ph{width:44px;height:44px;border-radius:12px;background:#fff;color:var(--orange);display:grid;place-items:center}
.cta-call small{display:block;font-size:12px;color:rgba(255,255,255,.7)}
.cta-call a{font-size:22px;font-weight:800;color:#fff;letter-spacing:.03em}
.cta-call a:hover{text-decoration:underline}
.form-card{background:var(--card);border-radius:18px;padding:34px 32px;color:var(--text);box-shadow:0 20px 60px rgba(0,0,0,.22)}
.form-card h3{font-size:20px;margin-bottom:4px}
.form-card .fc-sub{font-size:13.5px;color:var(--muted);margin-bottom:20px}
.fgrid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.field{display:flex;flex-direction:column;gap:7px}
.field.full{grid-column:1/-1}
.field label{font-size:13.5px;font-weight:600;color:var(--ink)}
.field label .req{color:#e5484d;margin-left:2px}
.field input{font-size:15px;padding:13px 15px;border:1.5px solid var(--border);border-radius:11px;background:var(--bg);
  color:var(--ink);outline:none;transition:border-color .2s,box-shadow .2s;font-family:inherit}
.field input:focus{border-color:var(--brand);box-shadow:0 0 0 4px var(--brand-tint)}
.field .err{font-size:12.5px;color:#e5484d;display:none}
.field.bad input{border-color:#e5484d}
.field.bad .err{display:block}
.form-card .btn{width:100%;margin-top:18px}
.fine{margin-top:14px;font-size:12px;color:var(--muted);text-align:center}
.form-alert{display:none;margin:12px 0 0;font-size:13px;color:#e5484d;text-align:center}
.form-alert.show{display:block}
.btn[disabled]{opacity:.65;cursor:not-allowed;transform:none}
.lead-ok{display:none}
.lead-ok .ok-ic{width:60px;height:60px;border-radius:50%;background:var(--grad);color:#fff;display:grid;place-items:center;
  font-size:26px;margin:0 auto 16px;box-shadow:0 10px 26px rgba(22,213,174,.4)}
.lead-ok h3{text-align:center}
.lead-ok .summary{background:var(--bg-soft);border:1px solid var(--border);border-radius:13px;padding:18px 20px;margin:18px 0}
.lead-ok .summary .srow{display:flex;justify-content:space-between;font-size:14px;padding:6px 0}
.lead-ok .summary .srow span:first-child{color:var(--muted)}
.lead-ok .summary .srow span:last-child{color:var(--ink);font-weight:600}
.lead-ok .btn{width:100%}
.lead-ok .again{display:block;margin:12px auto 0;background:none;border:none;color:var(--brand-deep);font-size:13.5px;cursor:pointer}

/* ---------- footer ---------- */
footer{background:#20263c;color:#a9b0c7;font-size:14px}
footer .wrap{padding-top:56px;padding-bottom:30px}
.f-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;margin-bottom:44px}
.f-brand .logo-txt b{color:#fff}
.f-brand .logo-txt span{color:#8a91a8}
.f-brand p{font-size:13.5px;margin:16px 0 0;max-width:24em;color:#8a91a8}
.f-col h3{color:#fff;font-size:15px;margin-bottom:18px}
.f-col a,.f-col span{display:block;color:#a9b0c7;padding:6px 0;transition:color .2s}
.f-col a:hover{color:#fff}
.f-tel{display:flex;align-items:center;gap:9px;font-size:19px;font-weight:700;color:#fff!important;margin:6px 0 8px}
.f-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:24px;display:flex;justify-content:space-between;
  gap:14px;flex-wrap:wrap;font-size:12.5px;color:#7d85a1}

/* ---------- wechat floating contact ---------- */
.wechat-fab{position:fixed;right:28px;bottom:40px;z-index:150;display:flex;align-items:center;gap:10px;
  animation:fab-up .55s cubic-bezier(.22,.9,.3,1.2);
  transition:opacity .3s ease,transform .3s ease}
@keyframes fab-up{from{opacity:0;transform:translateY(18px) scale(.85)}to{opacity:1;transform:none}}
.wechat-fab.fab-off{opacity:0;transform:translateY(14px);pointer-events:none}
.wx-tag{writing-mode:vertical-rl;font-size:12.5px;font-weight:700;letter-spacing:.35em;color:var(--brand-deep);
  background:var(--card);border:1px solid var(--brand-tint-2);border-radius:12px;padding:12px 7px 12px 9px;
  box-shadow:var(--shadow-sm);user-select:none;white-space:nowrap}
.wx-btn{position:relative;width:60px;height:60px;border-radius:50%;border:none;cursor:pointer;flex-shrink:0;
  background:var(--grad);color:#fff;display:grid;place-items:center;
  box-shadow:var(--shadow-brand);transition:transform .2s,box-shadow .25s}
.wx-btn:hover{transform:translateY(-3px) scale(1.03);box-shadow:0 18px 40px rgba(22,213,174,.42)}
.wx-btn:focus-visible{outline:3px solid var(--brand);outline-offset:3px}
.wx-dot{position:absolute;top:2px;right:2px;width:14px;height:14px;border-radius:50%;background:#ff4d4f;
  border:2.5px solid #fff}
.wx-dot::after{content:"";position:absolute;inset:-7px;border-radius:50%;border:2px solid #ff4d4f;
  animation:dot-ping 1.8s ease-out infinite}
@keyframes dot-ping{from{transform:scale(.55);opacity:.7}to{transform:scale(1.15);opacity:0}}
.wx-overlay{position:fixed;inset:0;z-index:300;display:flex;align-items:center;justify-content:center;padding:24px;
  background:rgba(13,22,28,.52);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
  opacity:0;visibility:hidden;transition:opacity .28s ease,visibility 0s linear .3s}
.wx-overlay.open{opacity:1;visibility:visible;transition:opacity .28s ease}
.wx-card{position:relative;width:340px;max-width:100%;background:var(--card);border:1px solid var(--border);
  border-radius:22px;padding:32px 30px 28px;box-shadow:0 30px 80px rgba(0,0,0,.28);text-align:center;
  transform:translateY(22px) scale(.95);transition:transform .34s cubic-bezier(.22,.9,.3,1.05)}
.wx-overlay.open .wx-card{transform:none}
.wx-close{position:absolute;top:14px;right:14px;width:34px;height:34px;border-radius:10px;border:none;cursor:pointer;
  background:var(--bg-soft);color:var(--muted);display:grid;place-items:center;transition:color .2s,background .2s}
.wx-close:hover{color:var(--ink);background:var(--brand-tint)}
.wx-card h3{font-size:19px;margin:0 0 6px;color:var(--ink);text-align:center}
.wx-sub{font-size:13.5px;color:var(--muted);margin:0 0 18px;text-align:center}
.qr-art{width:196px;height:196px;margin:0 auto;border-radius:16px;border:1px solid var(--border);
  background:#f7f8fb;overflow:hidden;display:grid;place-items:center}
.qr-art img{display:block;width:100%;height:100%;object-fit:contain}
.qr-cap{font-size:12px;color:var(--muted);text-align:center;margin:12px 0 0}
.wx-div{height:1px;background:var(--border-soft);margin:20px 0 16px}
.wx-phone{display:flex;align-items:center;gap:13px;border-radius:14px;padding:11px 16px;background:var(--brand-tint);
  transition:background .2s;text-align:left}
.wx-phone:hover{background:var(--brand-tint-2)}
.wx-phone .ph{width:40px;height:40px;border-radius:12px;background:var(--grad);color:#fff;display:grid;place-items:center;flex-shrink:0}
.wx-phone small{display:block;font-size:11.5px;color:var(--muted)}
.wx-phone b{font-size:20px;color:var(--ink);letter-spacing:.02em}
.wx-demo{display:inline-block;margin-top:16px;font-size:13.5px;color:var(--brand-deep);font-weight:600}
.wx-demo:hover{text-decoration:underline}
.no-scroll{overflow:hidden}

/* ---------- responsive：三断点 ----------
   PC ≥1024px（默认样式）· 平板 768–1023px · 手机 <768px */
/* ===== 平板 + 手机（≤1023px）：导航收起、Hero 堆叠、网格降列 ===== */
@media (max-width:1023px){
  .section{padding:72px 0}
  .nav-links,.nav-cta .login{display:none}
  .nav-cta .btn{display:none}
  .hamburger{display:inline-flex}
  .nav-inner{gap:14px}
  .nav.open .nav-inner{flex-wrap:wrap;height:auto;padding-top:14px;padding-bottom:18px;align-items:flex-start}
  .nav.open .nav-cta{display:contents}
  .nav.open .hamburger{order:1;margin-left:auto}
  .nav.open .nav-links{display:flex;flex-direction:column;gap:0;width:100%;order:2;margin:14px 0 0}
  .nav.open .nav-links a{padding:12px 2px;border-top:1px solid var(--border-soft);font-size:16px}
  .nav.open .nav-cta .btn{display:inline-flex;width:100%;margin:14px 0 0;order:3}
  .nav-cta{margin-left:auto}
  .hero{padding:52px 0 64px}
  .hero-grid{grid-template-columns:1fr;gap:48px}
  .hero h1{font-size:clamp(29px,4.4vw,40px)}
  .toast.t1{right:8px}.toast.t2{left:8px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(3)::before{display:none}
  /* 卡片网格：PC 3 列 → 平板 2 列 */
  .pain-grid{grid-template-columns:repeat(2,1fr)}
  .quote-grid{grid-template-columns:repeat(2,1fr)}
  .feat.wide,.feat.narrow{grid-column:span 12}
  .feat.wide{grid-template-columns:1fr}
  .mini-2{grid-template-columns:1fr;margin-top:0}
  .cta-inner{grid-template-columns:1fr;gap:36px;padding:48px 30px}
  .f-grid{grid-template-columns:1fr 1fr}
  /* 归因流程图：平板保持横向，节点按比例压缩 */
  .fnode{width:128px}
  .fnode .ring{width:76px;height:76px}
  .fnode .ring svg{width:32px;height:32px}
  .fnode .t{font-size:15px;white-space:nowrap}
  .fnode .d{font-size:12px}
  .fnode .n{width:28px;height:28px;font-size:12px}
  .fconn{min-width:6px;height:76px}
  .fconn::before,.fconn .base{top:37px}
  .fconn::after{top:calc(37px - 4px)}
  .fconn .pulse{top:calc(37px - 3px)}
  .loop-wrap{height:112px;margin-top:-10px}
  .loop-label{font-size:12.5px;padding:8px 16px}
  /* 支持矩阵：平板保留总览表格，收紧留白与字号 */
  .mx>div{padding:16px 10px;font-size:13.5px}
  .mx .r,.mx .c{padding:14px 10px}
  .str-grid,.guard-grid{grid-template-columns:1fr;gap:38px}
  .console{position:static}
  /* 全链路：平板保留横向，收紧间距与字号 */
  .chain-node{padding:20px 12px}
  .chain-node .ic{width:44px;height:44px}
  .chain-node p{font-size:12px}
  .chain-arrow{padding:0 6px}
  .chain-cap{max-width:560px;font-size:12.8px;padding:9px 18px}
  /* 微信悬浮入口：平板位置微调 */
  .wechat-fab{right:20px;bottom:32px}
}
/* ===== 手机（<768px）===== */
@media (max-width:767px){
  .section{padding:60px 0}
  /* Hero：上下堆叠、标题缩小 */
  .hero{padding:40px 0 56px}
  .hero h1{font-size:30px}
  .hero-sub{font-size:16px}
  .hero-grid{gap:40px}
  .hero-cta{margin:24px 0 20px}
  .hero-cta .btn{flex:1;padding:14px 12px}
  .trust-row{gap:14px 20px;font-size:13px}
  /* 仪表盘：KPI 变两列，提示卡片顺流排列 */
  .kpis{grid-template-columns:1fr 1fr}
  .dash-wrap{display:flex;flex-direction:column}
  .toast{position:relative;top:auto!important;right:auto!important;left:auto!important;bottom:auto!important;margin-top:12px}
  .stat .num{font-size:30px}
  /* 卡片网格：手机 1 列 */
  .pain-grid,.quote-grid,.vs-row{grid-template-columns:1fr}
  .ai-cards{grid-template-columns:1fr;max-width:640px}
  .cases-head{flex-direction:column;align-items:flex-start;gap:18px}
  /* 表单 / CTA / 页脚 */
  .fgrid{grid-template-columns:1fr}
  .cta-inner{padding:40px 22px}
  .form-card{padding:26px 22px}
  .f-grid{grid-template-columns:1fr}
  .f-bottom{flex-direction:column;gap:6px}
  /* 归因流程图 → 纵向时间线 */
  .flow-row{flex-direction:column;align-items:center}
  .fnode{width:100%;max-width:400px;display:grid;grid-template-columns:96px 1fr;gap:18px;text-align:left;align-items:center;
    background:var(--card);border:1px solid var(--border);border-radius:16px;padding:16px 20px 16px 14px;transition:border-color .3s}
  .fnode .ring{width:70px;height:70px}
  .fnode .ring svg{width:30px;height:30px}
  .fnode .n{top:-8px;right:-8px;width:26px;height:26px;font-size:12px}
  .fnode .t{margin:0 0 4px;font-size:16px;white-space:normal}
  .fnode.active,.fnode.done{border-color:var(--brand)}
  .fconn{width:2px;height:34px;min-width:0}
  .fconn .base{left:0;right:auto;top:0;bottom:0;width:2px;height:auto}
  .fconn::before{left:0;top:0;right:auto;bottom:100%;width:2px;height:auto;transition:bottom .7s cubic-bezier(.4,0,.2,1);
    background:linear-gradient(180deg,var(--brand),var(--brand-2))}
  .fconn.go::before{bottom:0}
  .fconn::after{top:auto;bottom:8px;right:calc(-3.5px);left:auto;border-left:5px solid transparent;border-right:5px solid transparent;
    border-top:8px solid var(--brand);transform:none;opacity:0;transition:opacity .4s .4s}
  .fconn.go::after{opacity:1}
  .fconn .pulse{left:-3px;top:0;width:8px;height:8px;animation:none}
  .fconn.go .pulse{opacity:1;animation:travelV 1.4s linear infinite}
  @keyframes travelV{from{top:0}to{top:calc(100% - 8px)}}
  .loop-wrap{display:none}
  .loop-pill{display:flex}
  .flow-detail{flex-direction:column;gap:14px}
  /* 支持矩阵 → 纵向堆叠卡片 */
  .mx{grid-template-columns:1fr}
  .mx .h{display:none}
  .mx .r{justify-content:flex-start;border-left:none;border-bottom:1px dashed var(--border-soft);border-radius:14px 14px 0 0;
    margin-bottom:-2px;padding-left:26px}
  .mx .c{justify-content:flex-start;border-left:none;padding-left:26px}
  .mx .c::before{content:attr(data-p);font-size:13px;color:var(--muted);width:5.2em}
  .mx .c:last-of-type{margin-bottom:8px;border-bottom:1px solid var(--border-soft)}
  /* 全链路 → 纵向 */
  .chain{flex-direction:column;max-width:400px;margin:0 auto}
  .chain-arrow{padding:8px 0}
  .chain-arrow svg{transform:rotate(90deg)}
  .chain-cap{border-radius:22px;font-size:13.5px;padding:10px 22px}
  .chain-node{padding:24px 16px}
  .chain-node p{font-size:12.8px}
  /* 微信悬浮入口：尺寸缩小、隐藏竖排标签，并在小屏避免遮挡正文与 CTA */
  .wx-btn{width:52px;height:52px}
  .wx-dot{width:12px;height:12px}
  .wx-tag{display:none}
  .wechat-fab{right:16px;bottom:24px}
  .wx-card{width:calc(100vw - 44px);max-width:340px;padding:26px 24px}
  .qr-art{width:168px;height:168px}
}