/* ===== 获客机 · 深色专业风 ===== */
:root{
  --bg:#0a0c10;
  --bg-soft:#0f1218;
  --bg-card:#141820;
  --bg-card-2:#1a1f29;
  --line:#222833;
  --line-2:#2e3540;
  --txt:#e8ebf0;
  --txt-dim:#98a2b3;
  --txt-faint:#697586;
  --blue:#3b82f6;
  --blue-soft:#60a5fa;
  --blue-dim:rgba(59,130,246,.12);
  --green:#22c55e;
  --radius:12px;
  --radius-lg:18px;
  --maxw:1180px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  background:var(--bg);color:var(--txt);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  line-height:1.7;font-size:16px;overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
ul{list-style:none}
h1,h2,h3{line-height:1.25;font-weight:700;letter-spacing:-.015em}
.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* 导航 */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(10,12,16,.72);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid transparent;transition:background .3s var(--ease),border-color .3s var(--ease);
}
.nav.is-scrolled{background:rgba(10,12,16,.95);border-bottom-color:var(--line)}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:22px}
.brand{display:flex;align-items:center;gap:11px;margin-right:auto}
.brand-mark{
  width:36px;height:36px;flex:0 0 36px;display:grid;place-items:center;
  border:1px solid var(--blue);border-radius:10px;color:var(--blue-soft);background:var(--blue-dim);
}
.brand-mark svg{width:19px;height:19px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:16.5px;letter-spacing:.05em}
.brand-text em{font-style:normal;font-size:9px;letter-spacing:.2em;color:var(--txt-faint)}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{padding:8px 13px;border-radius:8px;font-size:14.5px;color:var(--txt-dim);transition:color .2s,background .2s;white-space:nowrap}
.nav-links a:hover{color:var(--txt);background:rgba(255,255,255,.05)}
.nav-cta{background:var(--blue)!important;color:#fff!important;font-weight:600;margin-left:8px}
.nav-cta:hover{background:#2563eb!important}
.nav-toggle{display:none;background:none;border:1px solid var(--line-2);border-radius:9px;color:var(--txt);width:40px;height:40px;place-items:center;cursor:pointer}
.nav-toggle svg{width:20px;height:20px}

/* Hero */
.hero{position:relative;padding:150px 0 90px;overflow:hidden}
.hero-grid{
  position:absolute;inset:0;z-index:0;
  background-image:linear-gradient(rgba(59,130,246,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(59,130,246,.05) 1px,transparent 1px);
  background-size:52px 52px;
  mask-image:radial-gradient(ellipse 80% 60% at 50% 30%,#000,transparent);
  -webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 30%,#000,transparent);
}
.hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:1.15fr .85fr;gap:clamp(30px,5vw,70px);align-items:center}
.eyebrow{font-size:12.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--blue-soft);font-weight:600;margin-bottom:16px}
.hero h1{font-size:clamp(2.2rem,5.2vw,3.7rem);margin-bottom:22px}
.hero-sub{font-size:clamp(1rem,1.5vw,1.12rem);color:var(--txt-dim);max-width:48ch;margin-bottom:32px}
.hero-actions{display:flex;flex-wrap:wrap;gap:13px;margin-bottom:44px}
.hero-facts{display:flex;flex-wrap:wrap;gap:22px}
.hero-facts li{display:flex;align-items:center;gap:7px;font-size:14px;color:var(--txt-dim)}
.hero-facts svg{width:16px;height:16px;color:var(--green)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:10px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:transform .18s var(--ease),background .18s,border-color .18s,color .18s;
}
.btn svg{width:17px;height:17px}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:#2563eb;transform:translateY(-2px)}
.btn-ghost{border-color:var(--line-2);color:var(--txt)}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue-soft);transform:translateY(-2px)}
.btn-full{width:100%}

/* 数据看板示意 */
.dash{
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius-lg);
  overflow:hidden;box-shadow:0 30px 70px rgba(0,0,0,.55);
}
.dash-head{display:flex;align-items:center;gap:7px;padding:13px 16px;border-bottom:1px solid var(--line);background:var(--bg-card-2)}
.dash-dot{width:10px;height:10px;border-radius:50%;background:#2e3540}
.dash-title{margin-left:10px;font-size:12.5px;color:var(--txt-faint);letter-spacing:.05em}
.dash-body{padding:20px}
.dash-row{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:18px}
.dash-card{background:var(--bg-card-2);border:1px solid var(--line);border-radius:10px;padding:14px 15px}
.dash-label{display:block;font-size:12px;color:var(--txt-faint);margin-bottom:5px}
.dash-num{display:block;font-size:26px;font-weight:700;letter-spacing:-.02em;line-height:1.1}
.dash-trend{font-size:12px;font-weight:600}
.dash-trend.up{color:var(--green)}
.dash-chart{display:flex;align-items:flex-end;gap:7px;height:110px;padding:0 2px;margin-bottom:12px}
.bar{flex:1;background:linear-gradient(180deg,var(--blue),rgba(59,130,246,.28));border-radius:5px 5px 2px 2px;min-height:8px;transition:opacity .3s}
.bar:hover{opacity:.75}
.dash-foot{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--txt-faint)}
.dash-live{display:flex;align-items:center;gap:5px;color:var(--green)}
.live-dot{width:6px;height:6px;border-radius:50%;background:var(--green);animation:blink 1.6s infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.3}}

/* 通用 section */
.section{padding:clamp(66px,9vw,110px) 0}
.section-dark{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:680px;margin-bottom:clamp(36px,5vw,58px)}
.section-head h2{font-size:clamp(1.6rem,3.4vw,2.35rem);margin-bottom:14px}
.section-lead{color:var(--txt-dim);font-size:1.02rem}

/* 痛点 */
.pain-grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}
.pain{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px 26px;transition:border-color .3s,transform .3s}
.pain:hover{border-color:var(--line-2);transform:translateY(-3px)}
.pain-num{display:block;font-size:12.5px;font-weight:700;letter-spacing:.14em;color:var(--blue);margin-bottom:14px}
.pain h3{font-size:1.08rem;margin-bottom:10px}
.pain p{color:var(--txt-dim);font-size:14.5px}

/* 流程 */
.flow{display:grid;grid-template-columns:1fr auto 1fr auto 1fr auto 1fr;gap:14px;align-items:start;margin-bottom:36px}
.flow-step{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius-lg);padding:24px 20px;height:100%}
.flow-icon{width:40px;height:40px;display:grid;place-items:center;border-radius:11px;background:var(--blue-dim);border:1px solid rgba(59,130,246,.3);color:var(--blue-soft);margin-bottom:16px}
.flow-icon svg{width:20px;height:20px}
.flow-step h3{font-size:1rem;margin-bottom:9px}
.flow-step p{color:var(--txt-dim);font-size:13.8px}
.flow-arrow{display:grid;place-items:center;padding-top:42px;color:var(--txt-faint)}
.flow-arrow svg{width:18px;height:18px}
.flow-note{display:flex;gap:12px;align-items:flex-start;background:rgba(59,130,246,.07);border:1px solid rgba(59,130,246,.22);border-radius:var(--radius);padding:16px 20px}
.flow-note svg{width:19px;height:19px;flex:0 0 19px;color:var(--blue-soft);margin-top:2px}
.flow-note p{font-size:14.5px;color:var(--txt-dim)}
.flow-note strong{color:var(--txt)}

/* 功能 */
.feat-grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(270px,1fr))}
.feat{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px 26px;transition:border-color .3s,transform .3s}
.feat:hover{border-color:rgba(59,130,246,.4);transform:translateY(-3px)}
.feat-icon{width:44px;height:44px;display:grid;place-items:center;border-radius:12px;background:var(--blue-dim);border:1px solid rgba(59,130,246,.3);color:var(--blue-soft);margin-bottom:18px}
.feat-icon svg{width:22px;height:22px}
.feat h3{font-size:1.15rem;margin-bottom:11px}
.feat > p{color:var(--txt-dim);font-size:14.5px;margin-bottom:16px}
.feat-list{display:flex;flex-direction:column;gap:8px}
.feat-list li{font-size:13.5px;color:var(--txt-faint);padding-left:18px;position:relative}
.feat-list li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--blue)}

/* 定价 */
.price-grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));align-items:start}
.price{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius-lg);padding:32px 28px;position:relative;transition:border-color .3s,transform .3s}
.price:hover{transform:translateY(-3px)}
.price-featured{border-color:rgba(59,130,246,.5);background:linear-gradient(165deg,rgba(59,130,246,.08),var(--bg-card) 55%)}
.price-badge{position:absolute;top:-12px;left:28px;background:var(--blue);color:#fff;font-size:12px;font-weight:700;padding:5px 13px;border-radius:20px;letter-spacing:.03em}
.price h3{font-size:1.2rem;margin-bottom:6px}
.price-desc{color:var(--txt-faint);font-size:13.5px;margin-bottom:20px}
.price-amount{font-size:2.1rem;font-weight:700;letter-spacing:-.02em;margin-bottom:22px;color:var(--txt)}
.price-amount span{font-size:1.2rem;vertical-align:super;margin-right:2px}
.price-amount em{font-size:.85rem;font-weight:400;font-style:normal;color:var(--txt-faint)}
.price-list{display:flex;flex-direction:column;gap:10px;margin-bottom:26px}
.price-list li{font-size:14px;color:var(--txt-dim);padding-left:22px;position:relative}
.price-list li::before{
  content:"";position:absolute;left:0;top:8px;width:12px;height:7px;
  border-left:2px solid var(--green);border-bottom:2px solid var(--green);
  transform:rotate(-45deg);border-radius:1px;
}
.price-note{text-align:center;color:var(--txt-faint);font-size:14px;margin-top:30px}

/* 实践 */
.proof-grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));margin-bottom:34px}
.proof-card{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px 26px}
.proof-icon{width:42px;height:42px;display:grid;place-items:center;border-radius:11px;background:var(--blue-dim);border:1px solid rgba(59,130,246,.3);color:var(--blue-soft);margin-bottom:16px}
.proof-icon svg{width:21px;height:21px}
.proof-card h3{font-size:1.08rem;margin-bottom:10px}
.proof-card p{color:var(--txt-dim);font-size:14.3px;margin-bottom:16px}
.proof-metric{padding-top:14px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:2px}
.proof-metric strong{color:var(--blue-soft);font-size:15px}
.proof-metric span{font-size:12.5px;color:var(--txt-faint)}
.proof-quote{display:flex;gap:16px;align-items:flex-start;background:var(--bg-card);border:1px solid var(--line);border-left:3px solid var(--blue);border-radius:var(--radius);padding:24px 26px}
.quote-mark{width:26px;height:26px;flex:0 0 26px;color:var(--blue);opacity:.5}
.proof-quote p{font-size:1.02rem;color:var(--txt-dim);line-height:1.75}

/* FAQ */
.faq-list{display:grid;gap:0;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line);padding:24px 0}
.faq-item h3{font-size:1.05rem;margin-bottom:10px;position:relative;padding-left:20px}
.faq-item h3::before{content:"";position:absolute;left:0;top:10px;width:7px;height:7px;border-radius:50%;background:var(--blue)}
.faq-item p{color:var(--txt-dim);font-size:14.6px;max-width:78ch;padding-left:20px}

/* CTA */
.cta-section{padding:clamp(66px,9vw,110px) 0}
.cta-box{
  display:grid;grid-template-columns:1fr 1fr;gap:clamp(30px,5vw,60px);
  background:var(--bg-card);border:1px solid var(--line);border-radius:22px;
  padding:clamp(30px,5vw,52px);align-items:start;
}
.cta-left h2{font-size:clamp(1.5rem,3vw,2.1rem);margin-bottom:14px}
.cta-left > p{color:var(--txt-dim);font-size:15.5px;margin-bottom:24px}
.cta-points{display:flex;flex-direction:column;gap:11px}
.cta-points li{display:flex;align-items:center;gap:9px;font-size:14.5px;color:var(--txt-dim)}
.cta-points svg{width:16px;height:16px;color:var(--green);flex:0 0 16px}
.cta-form{background:var(--bg-card-2);border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px 26px}
.cta-form h3{font-size:1.15rem;margin-bottom:20px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;color:var(--txt-dim);margin-bottom:7px;font-weight:500}
.field .opt{color:var(--txt-faint);font-weight:400}
.field input,.field textarea{
  width:100%;background:var(--bg);border:1px solid var(--line-2);border-radius:9px;
  padding:12px 14px;color:var(--txt);font-size:15px;font-family:inherit;resize:vertical;
  transition:border-color .2s,box-shadow .2s;
}
.field input::placeholder,.field textarea::placeholder{color:var(--txt-faint)}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(59,130,246,.15)}
.form-note{font-size:12.5px;color:var(--txt-faint);margin-top:14px;text-align:center}

/* 表单成功态 */
.form-success{text-align:center;padding:20px 0}
.form-success svg{width:44px;height:44px;color:var(--green);margin:0 auto 16px}
.form-success h3{font-size:1.2rem;margin-bottom:10px}
.form-success p{color:var(--txt-dim);font-size:14.5px}

/* 页脚 */
.footer{background:#07090c;border-top:1px solid var(--line);padding:clamp(48px,6vw,66px) 0 0}
.footer-inner{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:38px}
.footer-brand strong{display:block;font-size:1.15rem;letter-spacing:.05em;margin-bottom:5px}
.footer-brand em{display:block;font-style:normal;font-size:9px;letter-spacing:.2em;color:var(--txt-faint);margin-bottom:14px}
.footer-brand p{color:var(--txt-dim);font-size:13.8px;line-height:1.8}
.footer-col{display:flex;flex-direction:column;gap:10px}
.footer-col h4{font-size:12.5px;letter-spacing:.14em;color:var(--blue-soft);text-transform:uppercase;margin-bottom:4px}
.footer-col a,.footer-col span{color:var(--txt-dim);font-size:13.8px;transition:color .2s}
.footer-col a:hover{color:var(--blue-soft)}
.footer-bottom{margin-top:42px;padding:20px 24px 24px;border-top:1px solid var(--line);color:var(--txt-faint);font-size:12.5px}

/* 滚动浮现 */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* 响应式 */
@media (max-width:980px){
  .flow{grid-template-columns:1fr;gap:16px}
  .flow-arrow{transform:rotate(90deg);padding:0;height:24px}
  .hero-inner{grid-template-columns:1fr}
  .hero-right{order:-1}
  .cta-box{grid-template-columns:1fr}
}
@media (max-width:760px){
  body{font-size:15.5px}
  .nav-toggle{display:grid}
  .nav-links{position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;gap:2px;background:rgba(10,12,16,.98);border-bottom:1px solid var(--line);padding:12px 18px 20px;display:none}
  .nav-links.is-open{display:flex}
  .nav-links a{padding:13px 14px;font-size:15.5px}
  .nav-cta{margin-left:0;margin-top:8px;justify-content:center}
  .hero{padding:120px 0 70px}
  .hero h1{font-size:clamp(1.9rem,8vw,2.6rem)}
  .btn{width:100%}
  .hero-actions{flex-direction:column;gap:11px}
  .hero-facts{gap:14px}
  .footer-inner{grid-template-columns:1fr;gap:30px}
  .price-featured{order:-1}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* 功能卡片配图 */
.feat-media{
  border:1px solid var(--line);border-radius:10px;overflow:hidden;
  margin-bottom:20px;background:#0d1015;aspect-ratio:16/10;
}
.feat-media img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease);display:block}
.feat:hover .feat-media img{transform:scale(1.04)}

/* ===== AI 客服 ===== */
.chat-launcher{
  position:fixed;right:22px;bottom:22px;z-index:200;
  width:56px;height:56px;border-radius:50%;
  display:grid;place-items:center;cursor:pointer;
  background:var(--blue);color:#fff;
  box-shadow:0 12px 32px rgba(59,130,246,.4);
  transition:transform .22s var(--ease),box-shadow .22s;
}
.chat-launcher:hover{transform:scale(1.07);box-shadow:0 16px 40px rgba(59,130,246,.5)}
.chat-launcher svg{width:24px;height:24px}
.chat-launcher.is-hidden{opacity:0;pointer-events:none;transform:scale(.6)}
.chat-dot{
  position:absolute;top:3px;right:3px;width:12px;height:12px;border-radius:50%;
  background:var(--green);border:2px solid var(--bg);
  animation:blink 1.8s infinite;
}

.chat-panel{
  position:fixed;right:22px;bottom:22px;z-index:201;
  width:min(370px,calc(100vw - 32px));
  height:min(540px,calc(100vh - 110px));
  background:var(--bg-card);border:1px solid var(--line-2);
  border-radius:16px;overflow:hidden;
  display:flex;flex-direction:column;
  box-shadow:0 24px 64px rgba(0,0,0,.6);
  opacity:0;transform:translateY(16px) scale(.97);pointer-events:none;
  transition:opacity .24s var(--ease),transform .24s var(--ease);
}
.chat-panel.is-open{opacity:1;transform:none;pointer-events:auto}

.chat-head{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 16px;border-bottom:1px solid var(--line);
  background:var(--bg-card-2);flex:0 0 auto;
}
.chat-title{display:flex;align-items:center;gap:10px}
.chat-avatar{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:var(--blue-dim);border:1px solid rgba(59,130,246,.35);color:var(--blue-soft);
}
.chat-avatar svg{width:17px;height:17px}
.chat-title strong{display:block;font-size:14px}
.chat-title em{display:flex;align-items:center;gap:5px;font-style:normal;font-size:11.5px;color:var(--green);margin-top:1px}
.chat-title .live-dot{width:5px;height:5px}
.chat-close{background:none;border:0;color:var(--txt-faint);cursor:pointer;padding:4px;border-radius:6px;display:grid;place-items:center;transition:color .2s,background .2s}
.chat-close:hover{color:var(--txt);background:rgba(255,255,255,.06)}
.chat-close svg{width:18px;height:18px}

.chat-body{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:11px}
.chat-body::-webkit-scrollbar{width:6px}
.chat-body::-webkit-scrollbar-thumb{background:var(--line-2);border-radius:3px}

.msg{display:flex;max-width:88%}
.msg.bot{align-self:flex-start}
.msg.user{align-self:flex-end}
.bubble{
  padding:10px 14px;border-radius:13px;font-size:14px;line-height:1.62;
  word-break:break-word;
}
.msg.bot .bubble{background:var(--bg-card-2);border:1px solid var(--line);color:var(--txt);border-bottom-left-radius:4px}
.msg.user .bubble{background:var(--blue);color:#fff;border-bottom-right-radius:4px}
.bubble a{color:var(--blue-soft);text-decoration:underline}
.msg.bot .bubble a{color:var(--blue-soft)}

.typing{display:flex;gap:4px;align-items:center;padding:13px 15px}
.typing span{width:6px;height:6px;border-radius:50%;background:var(--txt-faint);animation:tdot 1.3s infinite}
.typing span:nth-child(2){animation-delay:.18s}
.typing span:nth-child(3){animation-delay:.36s}
@keyframes tdot{0%,60%,100%{opacity:.28;transform:translateY(0)}30%{opacity:1;transform:translateY(-3px)}}

.chat-quick{display:flex;flex-wrap:wrap;gap:7px;margin-top:4px}
.chat-quick button{
  font-size:12.5px;padding:6px 12px;border-radius:20px;
  background:transparent;border:1px solid var(--line-2);color:var(--txt-dim);
  cursor:pointer;font-weight:500;transition:all .18s;
}
.chat-quick button:hover{border-color:var(--blue);color:var(--blue-soft);background:rgba(59,130,246,.08)}

.chat-input{
  display:flex;gap:9px;padding:12px 14px;border-top:1px solid var(--line);
  background:var(--bg-card-2);flex:0 0 auto;
}
.chat-input input{
  flex:1;background:var(--bg);border:1px solid var(--line-2);border-radius:9px;
  padding:10px 13px;color:var(--txt);font-size:14px;font-family:inherit;
}
.chat-input input::placeholder{color:var(--txt-faint)}
.chat-input input:focus{outline:none;border-color:var(--blue)}
.chat-input button{
  width:40px;height:40px;flex:0 0 40px;border-radius:9px;border:0;
  background:var(--blue);color:#fff;display:grid;place-items:center;cursor:pointer;
  transition:background .2s,transform .15s;
}
.chat-input button:hover{background:#2563eb}
.chat-input button:active{transform:scale(.94)}
.chat-input button svg{width:17px;height:17px}

@media (max-width:760px){
  .chat-launcher{right:16px;bottom:16px;width:52px;height:52px}
  .chat-panel{
    right:0;left:0;bottom:0;
    width:100%;height:78vh;
    border-radius:16px 16px 0 0;
    border-left:0;border-right:0;border-bottom:0;
  }
}

/* ===== 子页面 hero ===== */
.page-hero{
  padding:150px 0 clamp(44px,6vw,66px);
  background:radial-gradient(120% 90% at 20% 0%,rgba(59,130,246,.12),transparent 55%),var(--bg);
  border-bottom:1px solid var(--line);
}
.page-hero h1{font-size:clamp(1.9rem,4.8vw,3rem);margin-bottom:16px}
.page-hero p{color:var(--txt-dim);max-width:60ch;font-size:1.03rem}

/* 导航当前项 */
.nav-links a.is-active{color:var(--blue-soft);background:rgba(59,130,246,.1)}

/* ===== 功能详情页 ===== */
.detail-row{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:clamp(26px,4vw,58px);align-items:center;
  padding:clamp(32px,4vw,50px) 0;border-top:1px solid var(--line);
}
.detail-row:first-of-type{border-top:0;padding-top:0}
.detail-row.is-reverse .detail-media{order:2}
.detail-media{
  border:1px solid var(--line);border-radius:var(--radius-lg);
  overflow:hidden;background:#0d1015;aspect-ratio:16/11;
}
.detail-media img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.detail-row:hover .detail-media img{transform:scale(1.04)}
.detail-num{display:block;font-size:12.5px;font-weight:700;letter-spacing:.16em;color:var(--blue);margin-bottom:12px}
.detail-body h2{font-size:clamp(1.35rem,2.6vw,1.8rem);margin-bottom:12px}
.detail-lead{color:var(--blue-soft);font-size:1.02rem;font-weight:600;margin-bottom:12px}
.detail-body > p{color:var(--txt-dim);font-size:15px;margin-bottom:18px}
.detail-list{display:flex;flex-direction:column;gap:11px}
.detail-list li{font-size:14.3px;color:var(--txt-dim);padding-left:20px;position:relative}
.detail-list li::before{content:"";position:absolute;left:0;top:8px;width:7px;height:7px;border-radius:50%;background:var(--blue)}
.detail-list strong{color:var(--txt);font-weight:600}

/* ===== 案例页 ===== */
.case-block{margin-bottom:20px}
.case-head{margin-bottom:34px}
.case-tag{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.1em;color:var(--blue-soft);background:rgba(59,130,246,.12);border:1px solid rgba(59,130,246,.3);padding:4px 13px;border-radius:20px;margin-bottom:14px}
.case-head h2{font-size:clamp(1.5rem,3vw,2.1rem);margin-bottom:12px}
.case-desc{color:var(--txt-dim);font-size:1.02rem;max-width:62ch}
.case-grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));margin-bottom:26px}
.case-metric{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px 24px}
.case-num{display:block;font-size:1.7rem;font-weight:700;color:var(--blue-soft);letter-spacing:-.02em;margin-bottom:6px}
.case-label{display:block;font-size:12.5px;letter-spacing:.1em;color:var(--txt-faint);text-transform:uppercase;margin-bottom:12px}
.case-metric p{color:var(--txt-dim);font-size:14px}
.case-note{display:flex;gap:12px;align-items:flex-start;background:rgba(59,130,246,.07);border:1px solid rgba(59,130,246,.22);border-radius:var(--radius);padding:16px 20px}
.case-note svg{width:19px;height:19px;flex:0 0 19px;color:var(--blue-soft);margin-top:2px}
.case-note p{font-size:14.5px;color:var(--txt-dim)}
.case-note strong{color:var(--txt)}

.case-flow{display:grid;grid-template-columns:1fr auto 1fr;gap:20px;align-items:center;margin-bottom:24px}
.case-step{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px 24px}
.case-step h3{font-size:1.05rem;margin-bottom:14px;color:var(--txt)}
.case-step ul{display:flex;flex-direction:column;gap:9px}
.case-step li{font-size:14px;color:var(--txt-dim);padding-left:16px;position:relative}
.case-step li::before{content:"";position:absolute;left:0;top:9px;width:5px;height:5px;border-radius:50%;background:var(--txt-faint)}
.case-arrow{color:var(--txt-faint)}
.case-arrow svg{width:22px;height:22px}
.case-result{background:var(--bg-card);border-left:3px solid var(--green);border-radius:var(--radius);padding:18px 22px;font-size:14.6px;color:var(--txt-dim)}
.case-result strong{color:var(--green)}

/* ===== 诚实清单（案例/帮助页共用）===== */
.honest-list{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.honest-item{display:flex;gap:15px;background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius-lg);padding:24px 22px}
.honest-ico{
  flex:0 0 30px;width:30px;height:30px;border-radius:9px;
  display:grid;place-items:center;font-size:14px;font-weight:700;
  background:var(--blue-dim);border:1px solid rgba(59,130,246,.35);color:var(--blue-soft);
}
.honest-item h3{font-size:1.02rem;margin-bottom:8px}
.honest-item p{color:var(--txt-dim);font-size:14.2px}
.honest-cta{text-align:center;margin-top:40px}
.honest-cta p{color:var(--txt-dim);margin-bottom:18px}

/* ===== 行业方案页 ===== */
.sol-grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.sol-card{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px 26px;transition:border-color .3s,transform .3s}
.sol-card:hover{border-color:var(--line-2);transform:translateY(-3px)}
.sol-featured{border-color:rgba(59,130,246,.45);background:linear-gradient(165deg,rgba(59,130,246,.08),var(--bg-card) 60%)}
.sol-head{display:flex;align-items:center;gap:13px;margin-bottom:16px;flex-wrap:wrap}
.sol-icon{width:42px;height:42px;flex:0 0 42px;display:grid;place-items:center;border-radius:11px;background:var(--blue-dim);border:1px solid rgba(59,130,246,.3);color:var(--blue-soft)}
.sol-icon svg{width:21px;height:21px}
.sol-head h3{font-size:1.12rem;margin:0}
.sol-badge{font-size:11.5px;font-weight:700;color:#fff;background:var(--blue);padding:3px 11px;border-radius:20px}
.sol-pain{font-size:14.3px;color:var(--txt-dim);background:rgba(210,153,34,.08);border-left:2px solid var(--warn);padding:10px 14px;border-radius:0 7px 7px 0;margin-bottom:14px}
.sol-pain strong{color:var(--warn)}
.sol-desc{font-size:14.4px;color:var(--txt-dim);margin-bottom:16px}
.sol-list{display:flex;flex-direction:column;gap:8px;margin-bottom:14px}
.sol-list li{font-size:13.8px;color:var(--txt-faint);padding-left:18px;position:relative}
.sol-list li::before{content:"";position:absolute;left:0;top:8px;width:6px;height:6px;border-radius:50%;background:var(--blue)}
.sol-note{font-size:13px;color:var(--txt-faint);padding-top:12px;border-top:1px solid var(--line)}

/* 适合/不适合 */
.fit-grid{display:grid;gap:20px;grid-template-columns:1fr 1fr}
.fit-item{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px 26px}
.fit-item h3{display:flex;align-items:center;gap:9px;font-size:1.08rem;margin-bottom:16px}
.fit-item h3 svg{width:18px;height:18px}
.fit-yes h3{color:var(--green)}
.fit-no h3{color:var(--err)}
.fit-item ul{display:flex;flex-direction:column;gap:10px}
.fit-item li{font-size:14.3px;color:var(--txt-dim);padding-left:16px;position:relative}
.fit-item li::before{content:"";position:absolute;left:0;top:9px;width:5px;height:5px;border-radius:50%;background:var(--txt-faint)}

/* ===== 帮助中心 ===== */
.help-nav{
  display:flex;flex-wrap:wrap;gap:10px;
  padding-bottom:6px;
}
.help-nav a{
  font-size:14px;padding:9px 18px;border-radius:22px;
  border:1px solid var(--line-2);color:var(--txt-dim);
  transition:all .2s;
}
.help-nav a:hover{border-color:var(--blue);color:var(--blue-soft);background:rgba(59,130,246,.08)}

@media (max-width:860px){
  .detail-row,.detail-row.is-reverse{grid-template-columns:1fr;gap:22px}
  .detail-row.is-reverse .detail-media{order:0}
  .detail-media{aspect-ratio:4/3}
  .case-flow{grid-template-columns:1fr;gap:14px}
  .case-arrow{transform:rotate(90deg);justify-self:center}
  .fit-grid{grid-template-columns:1fr}
  .page-hero{padding:120px 0 50px}
}