/* ===== 王旭 · AI 自动化交付 落地页 ===== */

:root{
  --bg:#070f1a;
  --bg2:#0b1522;
  --bg3:#0d1c2b;
  --card:#0f1e2e;
  --line:#1b3243;
  --line2:#234a5c;
  --txt:#e6edf3;
  --txt2:#a8bdcc;
  --txt3:#6d8798;
  --cy:#22d3ee;
  --cy2:#5eead4;
  --cy-soft:rgba(34,211,238,.1);
  --am:#f0b429;
  --r:14px;
  --wrap:1180px;
  --ez:cubic-bezier(.22,.61,.36,1);
  --sh:0 18px 44px rgba(0,0,0,.42);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:78px;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--txt);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  line-height:1.78;font-size:16px;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 24px}

/* ---------- Header ---------- */
.hdr{position:sticky;top:0;z-index:60;background:rgba(7,15,26,.82);
  backdrop-filter:saturate(160%) blur(12px);border-bottom:1px solid transparent;
  transition:border-color .3s var(--ez)}
.hdr.on{border-bottom-color:var(--line)}
.hdr-in{display:flex;align-items:center;justify-content:space-between;height:72px;gap:20px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-dot{width:9px;height:9px;border-radius:50%;background:var(--cy2);
  box-shadow:0 0 0 4px rgba(94,234,212,.14);flex:0 0 auto}
.brand-txt{font-size:17px;font-weight:700;letter-spacing:.04em;white-space:nowrap}
.brand-txt em{font-style:normal;font-size:11.5px;color:var(--txt3);font-weight:400;
  letter-spacing:.1em;margin-left:6px}

.nav{display:flex;align-items:center;gap:26px}
.nav a{font-size:14px;color:var(--txt2);position:relative;padding:6px 0;white-space:nowrap;transition:color .2s}
.nav a:not(.nav-cta)::after{content:"";position:absolute;left:0;right:100%;bottom:0;height:1.5px;
  background:var(--cy);transition:right .3s var(--ez)}
.nav a:not(.nav-cta):hover{color:var(--cy2)}
.nav a:not(.nav-cta):hover::after{right:0}
.nav-cta{background:var(--cy);color:#04212b!important;padding:9px 18px;border-radius:999px;
  font-weight:700;transition:transform .2s var(--ez),box-shadow .2s}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 8px 22px rgba(34,211,238,.3)}

.burger{display:none;flex-direction:column;gap:5px;width:42px;height:42px;align-items:center;
  justify-content:center;background:none;border:1px solid var(--line);border-radius:10px;cursor:pointer}
.burger span{display:block;width:18px;height:2px;background:var(--txt);border-radius:2px;transition:.3s var(--ez)}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- Hero ---------- */
.hero{position:relative;padding:76px 0 0;overflow:hidden}
.hero-glow{position:absolute;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(820px 460px at 8% -10%, rgba(34,211,238,.13) 0%, transparent 62%),
    radial-gradient(620px 380px at 96% 4%, rgba(240,180,41,.08) 0%, transparent 58%),
    linear-gradient(180deg,transparent 0%, var(--bg2) 100%)}
.hero-in{position:relative;z-index:1;display:grid;grid-template-columns:1.12fr .88fr;gap:54px;align-items:center}

.tag{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.14em;
  color:var(--cy2);background:rgba(34,211,238,.07);border:1px solid rgba(34,211,238,.22);
  padding:6px 14px;border-radius:999px;margin-bottom:24px;font-family:ui-monospace,monospace}
.tag-dot{width:6px;height:6px;border-radius:50%;background:var(--cy2);
  animation:bl 2.2s ease-in-out infinite}
@keyframes bl{0%,100%{opacity:1}50%{opacity:.32}}

.hero h1{font-size:clamp(30px,4.5vw,52px);letter-spacing:-.025em;margin-bottom:24px}
.hero h1 .hl{color:var(--cy2);position:relative;white-space:nowrap}
.hero h1 .hl::after{content:"";position:absolute;left:0;right:0;bottom:5px;height:9px;
  background:rgba(34,211,238,.16);z-index:-1;border-radius:2px}
.lead{font-size:16.8px;color:var(--txt2);max-width:56ch}
.lead strong{color:var(--txt);font-weight:700}
.lead2{margin-top:16px;padding-left:16px;border-left:2px solid var(--am);color:var(--txt2)}
.lead2 strong{color:var(--am)}

.acts{display:flex;flex-wrap:wrap;gap:14px;margin:32px 0 26px}
.btn{display:inline-flex;flex-direction:column;align-items:flex-start;gap:2px;
  padding:14px 26px;border-radius:12px;font-weight:700;cursor:pointer;
  border:1px solid transparent;font-size:15.5px;font-family:inherit;text-align:left;
  transition:transform .2s var(--ez),box-shadow .2s var(--ez),background .2s}
.b-l{line-height:1.35}
.b-h{font-size:12.5px;font-weight:400;opacity:.8}
.btn-main{background:var(--cy);color:#04212b;box-shadow:0 8px 22px rgba(34,211,238,.22)}
.btn-main:hover{transform:translateY(-2px);box-shadow:0 14px 32px rgba(34,211,238,.32)}
.btn-gh{background:rgba(255,255,255,.03);color:var(--txt);border-color:var(--line2);justify-content:center}
.btn-gh:hover{border-color:var(--cy);color:var(--cy2);transform:translateY(-2px)}
.btn-blk{display:flex;width:100%;align-items:center;justify-content:center;text-align:center;padding:15px}

.chips{display:flex;flex-wrap:wrap;gap:9px}
.chips li{font-size:13px;color:var(--txt2);background:rgba(255,255,255,.03);
  border:1px solid var(--line);padding:6px 13px;border-radius:8px}
.chips b{color:var(--cy2);font-family:ui-monospace,monospace}

.hero-vis img{width:100%;border-radius:16px;box-shadow:var(--sh)}

.strip{position:relative;z-index:1;display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  margin:70px 0 0;background:var(--line);border:1px solid var(--line);
  border-radius:var(--r);overflow:hidden}
.strip li{background:var(--bg3);padding:26px 18px;text-align:center}
.strip b{display:block;font-size:32px;color:var(--cy2);font-weight:800;letter-spacing:-.02em;
  font-family:ui-monospace,monospace}
.strip b.nc{font-size:26px}
.strip span{font-size:13px;color:var(--txt3)}
.hero .wrap:last-child{padding-bottom:76px}

/* ---------- Sections ---------- */
.sec{padding:92px 0}
.sh{max-width:660px;margin:0 auto 52px;text-align:center}
.sh h2{font-size:clamp(25px,3.4vw,38px);margin-bottom:12px}
.sh p{color:var(--txt3);font-size:16px}
.sh-l{text-align:left;margin-left:0;margin-bottom:26px}

/* 痛点 */
.pain{background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.pain-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.pain-it{background:var(--bg3);padding:34px 30px;transition:background .3s}
.pain-it:hover{background:#102232}
.p-n{display:block;font-size:12.5px;letter-spacing:.16em;color:var(--cy2);
  font-weight:700;margin-bottom:14px;font-family:ui-monospace,monospace}
.pain-it h3{font-size:19px;margin-bottom:11px}
.pain-it p{color:var(--txt2);font-size:14.8px}
.pain-ft{margin-top:34px;text-align:center;color:var(--txt2);font-size:15.5px;
  max-width:66ch;margin-left:auto;margin-right:auto}
.pain-ft strong{color:var(--cy2)}

/* 报价 */
.off-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.off{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:30px;
  display:flex;flex-direction:column;position:relative;overflow:hidden;
  transition:transform .3s var(--ez),box-shadow .3s var(--ez),border-color .3s}
.off::before{content:"";position:absolute;left:0;top:0;bottom:0;width:2.5px;background:var(--cy);
  transform:scaleY(0);transform-origin:top;transition:transform .35s var(--ez)}
.off:hover{transform:translateY(-3px);box-shadow:var(--sh);border-color:var(--line2)}
.off:hover::before{transform:scaleY(1)}
.off.feat{border-color:#1f5567}
.off.feat::before{transform:scaleY(1);background:var(--am)}
.off-tag{display:inline-block;font-size:11.5px;letter-spacing:.1em;color:var(--am);
  background:rgba(240,180,41,.1);border:1px solid rgba(240,180,41,.28);
  padding:4px 11px;border-radius:6px;margin-bottom:12px;font-weight:600}
.off h3{font-size:20px;margin-bottom:14px}
.off-price{display:flex;align-items:baseline;gap:8px;padding-bottom:16px;
  border-bottom:1px solid var(--line);margin-bottom:16px}
.off-price b{font-size:34px;color:var(--cy2);font-family:ui-monospace,monospace;
  font-weight:800;letter-spacing:-.02em}
.off-price span{font-size:13.5px;color:var(--txt3)}
.off-d{color:var(--txt2);font-size:14.6px;margin-bottom:18px}
.off-p{display:flex;flex-direction:column;gap:9px;margin-bottom:22px}
.off-p li{position:relative;padding-left:23px;font-size:14.2px;color:var(--txt2)}
.off-p li::before{content:"";position:absolute;left:2px;top:9px;width:12px;height:6px;
  border-left:2px solid var(--cy);border-bottom:2px solid var(--cy);
  transform:rotate(-45deg);border-radius:1px}
.off-ft{margin-top:auto;display:flex;flex-direction:column;gap:8px;
  padding-top:16px;border-top:1px solid var(--line)}
.off-note{font-size:12.5px;color:var(--txt3)}
.off-lk{color:var(--cy2);font-weight:700;font-size:14.5px}
.off-lk:hover{color:var(--cy)}

.off-rule{margin-top:26px;background:var(--bg3);border:1px solid var(--line);
  border-left:2.5px solid var(--am);border-radius:12px;padding:26px 30px}
.off-rule h4{font-size:16.5px;margin-bottom:14px}
.off-rule ul{display:flex;flex-direction:column;gap:10px}
.off-rule li{font-size:14.6px;color:var(--txt2);position:relative;padding-left:16px}
.off-rule li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;
  border-radius:50%;background:var(--cy2)}
.off-rule b{color:var(--txt)}

/* 怎么做 */
.how{background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.how-fig{margin:0 auto 46px;max-width:640px}
.how-fig img{width:100%;border-radius:var(--r)}
.how-fig figcaption{margin-top:12px;font-size:12.5px;color:var(--txt3);text-align:center}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.steps li{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:26px 22px;
  display:flex;flex-direction:column;transition:transform .3s var(--ez),border-color .3s}
.steps li:hover{transform:translateY(-3px);border-color:var(--line2)}
.s-i{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;
  border-radius:10px;background:var(--cy-soft);color:var(--cy2);font-weight:800;font-size:13.5px;
  margin-bottom:15px;font-family:ui-monospace,monospace}
.steps h3{font-size:17.5px;margin-bottom:9px}
.steps p{font-size:14.2px;color:var(--txt2)}

/* 真实记录 */
.log{max-width:880px;margin:0 auto;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r);overflow:hidden;box-shadow:var(--sh)}
.log-hd{display:flex;align-items:center;gap:12px;padding:14px 20px;
  background:#0a1420;border-bottom:1px solid var(--line)}
.dots{display:flex;gap:6px}
.dots i{width:10px;height:10px;border-radius:50%;background:#25404f;display:block}
.dots i:first-child{background:#3d4f5c}
.log-t{font-size:12.5px;color:var(--txt3);font-family:ui-monospace,monospace;letter-spacing:.06em}
.log-row{display:grid;grid-template-columns:78px 1fr;gap:18px;padding:24px 26px;
  border-bottom:1px solid var(--line)}
.log-time{font-size:13px;color:var(--cy2);font-family:ui-monospace,monospace;
  font-weight:700;padding-top:2px}
.log-body h4{font-size:16.5px;margin-bottom:8px}
.log-body p{font-size:14.4px;color:var(--txt2);margin-bottom:12px}
.log-body b{color:var(--txt);font-weight:600}
.log-tag{display:inline-block;font-size:12px;color:var(--cy2);background:var(--cy-soft);
  border:1px solid rgba(34,211,238,.2);padding:4px 11px;border-radius:6px;
  font-family:ui-monospace,monospace}
.log-ft{padding:24px 26px;font-size:15px;color:var(--txt2);text-align:center;background:#0a1420}
.log-ft strong{color:var(--cy2)}

/* 为什么找我 */
.who{background:var(--bg2);border-top:1px solid var(--line)}
.who-in{display:grid;grid-template-columns:1.35fr .65fr;gap:48px;align-items:start}
.who-list{display:flex;flex-direction:column;gap:20px;margin:26px 0}
.who-list li{position:relative;padding-left:22px;font-size:14.8px;color:var(--txt2)}
.who-list li::before{content:"";position:absolute;left:0;top:11px;width:7px;height:7px;
  border-radius:50%;background:var(--cy2)}
.who-list b{color:var(--txt);display:inline}
.who-list em{font-style:normal;color:var(--cy2);display:block;margin-top:4px;font-size:14px}
.who-note{padding:20px 22px;background:var(--bg3);border-left:2.5px solid var(--am);
  border-radius:12px;font-size:14.6px;color:var(--txt2)}
.who-note strong{color:var(--txt)}
.who-card{background:var(--card);border:1px solid var(--line2);border-radius:16px;
  padding:30px;box-shadow:var(--sh);position:sticky;top:100px}
.who-card h4{font-size:18px;margin-bottom:12px}
.who-card p{font-size:14.4px;color:var(--txt2);margin-bottom:18px}
.who-card b{color:var(--cy2)}
.who-ck{display:flex;flex-direction:column;gap:8px;margin-bottom:22px}
.who-ck span{font-size:13.5px;color:var(--txt2)}

/* 留资 */
.contact{background:linear-gradient(180deg,var(--bg2) 0%,#050b12 100%);
  border-top:1px solid var(--line)}
.ct-in{display:grid;grid-template-columns:.9fr 1.1fr;gap:52px;align-items:start}
.ct-txt h2{font-size:clamp(25px,3.3vw,36px);margin-bottom:14px}
.ct-p{display:flex;flex-direction:column;gap:9px;margin:24px 0 30px}
.ct-p li{position:relative;padding-left:22px;font-size:14.5px;color:var(--txt2)}
.ct-p li::before{content:"";position:absolute;left:0;top:10px;width:7px;height:7px;
  border-radius:50%;background:var(--cy2)}
/* 二维码 */
.qr-box{display:flex;align-items:stretch;gap:18px;padding:16px;border-radius:16px;
  background:linear-gradient(145deg,rgba(34,211,238,.05),rgba(15,30,46,.92));
  border:1px solid var(--line2)}
.qr-card{position:relative;width:132px;flex:0 0 auto;border-radius:10px;overflow:hidden;
  background:#fff;display:flex;align-items:center;justify-content:center}
.qr-img{width:100%;height:100%;object-fit:cover;object-position:center;display:block}
.qr-ph{display:none;flex-direction:column;align-items:center;justify-content:center;
  gap:6px;text-align:center;padding:30px 10px}
.qr-card.qr-empty{background:#0a1420;border:1px dashed var(--line2);min-height:170px}
.qr-card.qr-empty .qr-ph{display:flex}
.qr-lb{font-size:11.5px;letter-spacing:.18em;color:var(--cy2);font-family:ui-monospace,monospace}
.qr-ph p{font-size:12.5px;color:var(--txt3)}
.qr-side{display:flex;flex-direction:column;justify-content:center;gap:7px;min-width:0}
.qr-tag{align-self:flex-start;font-size:10.5px;letter-spacing:.18em;color:var(--cy2);
  font-family:ui-monospace,monospace;background:var(--cy-soft);
  border:1px solid rgba(34,211,238,.24);padding:3px 9px;border-radius:5px}
.qr-side strong{font-size:16.5px;line-height:1.35}
.qr-side p{font-size:13.3px;color:var(--txt2);line-height:1.7}
.qr-side p b{color:var(--cy2);font-weight:700}

/* 表单分组 */
.frm-hd{grid-column:1/-1;display:flex;align-items:baseline;justify-content:space-between;
  gap:12px;flex-wrap:wrap;padding-bottom:14px;margin-bottom:2px;border-bottom:1px solid var(--line)}
.frm-hd strong{font-size:17px}
.frm-hd span{font-size:12.5px;color:var(--txt3);font-family:ui-monospace,monospace}
.fg-lb{display:flex;align-items:center;gap:9px;font-size:12px;letter-spacing:.16em;
  color:var(--cy2);font-family:ui-monospace,monospace;margin-top:6px}
.fg-lb i{font-style:normal;display:inline-flex;align-items:center;justify-content:center;
  width:20px;height:20px;border-radius:5px;background:var(--cy-soft);
  border:1px solid rgba(34,211,238,.28);font-size:10.5px}
.fg-lb::after{content:"";flex:1;height:1px;background:linear-gradient(90deg,var(--line),transparent)}
.f-hint{font-size:11.8px;color:var(--txt3);font-weight:400;line-height:1.5}
.frm label .f-hint{margin-left:6px}
.f-hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.ok-ic{width:46px;height:46px;border-radius:50%;background:var(--cy-soft);
  border:1px solid rgba(34,211,238,.35);position:relative;flex:0 0 auto}
.ok-ic::after{content:"";position:absolute;left:15px;top:12px;width:13px;height:22px;
  border:solid var(--cy2);border-width:0 2.5px 2.5px 0;transform:rotate(45deg) translateY(-2px)}

.frm{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:30px;
  display:grid;grid-template-columns:1fr 1fr;gap:16px 18px;position:relative;box-shadow:var(--sh)}
.f{display:flex;flex-direction:column;gap:7px}
.f-full{grid-column:1/-1}
.frm label{font-size:13.5px;font-weight:600;color:var(--txt2)}
.frm label em{color:#f87171;font-style:normal}
.frm input,.frm select,.frm textarea{
  font:inherit;font-size:15px;color:var(--txt);padding:12px 14px;
  border:1px solid var(--line2);border-radius:10px;background:#0a1420;width:100%;
  transition:border-color .2s,box-shadow .2s}
.frm textarea{resize:vertical;min-height:96px}
.frm input::placeholder,.frm textarea::placeholder{color:#4d6577}
.frm input:focus,.frm select:focus,.frm textarea:focus{
  outline:none;border-color:var(--cy);box-shadow:0 0 0 3px rgba(34,211,238,.13)}
.frm input.bad,.frm select.bad{border-color:#f87171;box-shadow:0 0 0 3px rgba(248,113,113,.12)}
.frm .btn-blk,.f-note,.f-err{grid-column:1/-1}
.f-note{font-size:12px;color:var(--txt3);text-align:center;margin-top:-4px}
.f-err{font-size:13.5px;color:#fca5a5;background:rgba(248,113,113,.09);
  border:1px solid rgba(248,113,113,.3);padding:10px 14px;border-radius:9px}
.f-ok{position:absolute;inset:0;background:var(--card);border-radius:18px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:10px;text-align:center;padding:40px;z-index:5}
/* hidden 属性必须能压住上面的 display:flex，否则成功提示会一直盖住表单 */
.f-ok[hidden],.f-err[hidden]{display:none!important}
.f-ok strong{font-size:22px;color:var(--cy2)}
.f-ok p{color:var(--txt2);font-size:15px;max-width:34ch}

/* Footer */
.ftr{background:#040a11;color:var(--txt3);padding:42px 0;border-top:1px solid var(--line)}
.ftr-in{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px}
.ftr-b strong{color:var(--txt);font-size:16px;display:block;letter-spacing:.06em}
.ftr-b p{font-size:13px;margin-top:4px}
.ftr-n{display:flex;flex-wrap:wrap;gap:22px;font-size:14px}
.ftr-n a:hover{color:var(--cy2)}
.cr{font-size:12.5px;width:100%;padding-top:20px;border-top:1px solid var(--line)}

.fab{position:fixed;right:22px;bottom:22px;z-index:50;background:var(--cy);color:#04212b;
  padding:13px 24px;border-radius:999px;font-weight:700;font-size:14.5px;
  box-shadow:0 10px 30px rgba(34,211,238,.34);opacity:0;visibility:hidden;
  transform:translateY(12px);transition:opacity .3s var(--ez),transform .3s var(--ez),visibility .3s}
.fab.show{opacity:1;visibility:visible;transform:translateY(0)}

.rv{opacity:0;transform:translateY(22px);transition:opacity .6s var(--ez),transform .6s var(--ez)}
.rv.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1100px){
  .nav{gap:18px}
  .nav a{font-size:13.3px}
  .steps{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:1000px){
  .hero-in{grid-template-columns:1fr;gap:42px}
  .hero-vis{max-width:460px}
  .pain-grid,.off-grid{grid-template-columns:1fr}
  .who-in{grid-template-columns:1fr;gap:38px}
  .who-card{position:static}
  .ct-in{grid-template-columns:1fr;gap:38px}
}
@media (max-width:760px){
  html{scroll-padding-top:64px}
  .hdr-in{height:60px}
  .burger{display:flex}
  .nav{position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;
    gap:0;background:var(--bg2);border-bottom:1px solid var(--line);padding:8px 24px 20px;
    max-height:0;overflow:hidden;opacity:0;visibility:hidden;
    transition:max-height .35s var(--ez),opacity .25s,visibility .25s}
  .nav.open{max-height:460px;opacity:1;visibility:visible}
  .nav a{padding:13px 0;border-bottom:1px solid var(--line);font-size:15px}
  .nav-cta{text-align:center;margin-top:12px;border-bottom:none}
  .sec{padding:58px 0}
  .hero{padding-top:44px}
  .hero h1 .hl{white-space:normal}
  .steps{grid-template-columns:1fr}
  .strip{grid-template-columns:1fr 1fr;margin-top:44px}
  .hero .wrap:last-child{padding-bottom:52px}
  .log-row{grid-template-columns:1fr;gap:8px;padding:22px}
  .log-ft{padding:22px}
  .frm{grid-template-columns:1fr;padding:24px}
  .btn{width:100%}
  .acts{flex-direction:column}
  .fab{right:16px;bottom:16px;padding:12px 20px}
}

@media (max-width:520px){
  .qr-box{flex-direction:column;text-align:center;gap:16px}
  .qr-side p{font-size:13px}
}

/* ============ v2 视觉增强 ============ */

/* 全局网格底纹 */
body::before{content:"";position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.5;
  background-image:
    linear-gradient(rgba(35,74,92,.16) 1px,transparent 1px),
    linear-gradient(90deg,rgba(35,74,92,.16) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse 78% 62% at 50% 0%,#000 22%,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse 78% 62% at 50% 0%,#000 22%,transparent 78%)}
body>*{position:relative;z-index:1}

/* 首屏光斑流动 */
.hero-glow::after{content:"";position:absolute;inset:0;
  background:
    radial-gradient(340px 340px at 76% 26%,rgba(94,234,212,.11),transparent 68%),
    radial-gradient(280px 280px at 14% 72%,rgba(240,180,41,.07),transparent 66%);
  animation:drift 22s ease-in-out infinite alternate}
@keyframes drift{
  0%{transform:translate3d(0,0,0) scale(1)}
  100%{transform:translate3d(-2.5%,2%,0) scale(1.06)}}

/* 卡片渐变描边 + 悬浮上浮 */
.pain-it,.off,.who-card,.frm{position:relative;isolation:isolate}
.pain-it::before,.off::before{content:"";position:absolute;inset:0;border-radius:inherit;
  padding:1px;background:linear-gradient(140deg,rgba(34,211,238,.42),transparent 42%,transparent 62%,rgba(240,180,41,.24));
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  mask-composite:exclude;opacity:0;transition:opacity .35s var(--ez);pointer-events:none;z-index:2}
.pain-it:hover::before,.off:hover::before{opacity:1}
.pain-it,.off{transition:transform .32s var(--ez),box-shadow .32s var(--ez),background .32s}
.pain-it:hover,.off:hover{transform:translateY(-4px);box-shadow:0 22px 48px rgba(0,0,0,.5)}

/* 痛点序号渐变 */
.p-n{position:relative;display:inline-block;font-family:ui-monospace,monospace;
  background:linear-gradient(135deg,var(--cy2),rgba(34,211,238,.28));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}

/* 章节标题下划线 */
.sh h2{position:relative;display:inline-block}
.sh h2::after{content:"";position:absolute;left:0;bottom:-9px;width:44px;height:2.5px;border-radius:2px;
  background:linear-gradient(90deg,var(--cy),var(--cy2))}

/* 输入框悬停/聚焦 */
.frm input:hover,.frm select:hover,.frm textarea:hover{border-color:var(--line2);background:#0b1725}
.frm input:focus,.frm select:focus,.frm textarea:focus{background:#0b1826}

/* 提交按钮流光 */
#sbmt{position:relative;overflow:hidden}
#sbmt::after{content:"";position:absolute;top:0;bottom:0;width:38%;left:-45%;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.34),transparent);
  transform:skewX(-18deg);transition:left .55s var(--ez)}
#sbmt:hover::after{left:118%}

/* 顶标发光 */
.hdr.on{box-shadow:0 1px 0 0 rgba(34,211,238,.14),0 6px 24px rgba(0,0,0,.34)}

/* 悬浮按钮呼吸 */
.fab.show{animation:pulse 2.8s ease-in-out infinite}
@keyframes pulse{
  0%,100%{box-shadow:0 10px 30px rgba(34,211,238,.34)}
  50%{box-shadow:0 10px 38px rgba(34,211,238,.56)}}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
  html{scroll-behavior:auto}
  .rv{opacity:1;transform:none}
  body::before{display:none}
  .fab.show{animation:none}
}