:root{
  --main:#db2777;
  --accent:#f43f5e;
  --bg:#fff1f5;
  --ink:#500724;
  --line:#f6cdd9;
  --muted:#9c6b7c;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-weight:400;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5{
  font-weight:800;
  letter-spacing:-0.02em;
  color:var(--ink);
  margin:0;
}
a{color:var(--main);text-decoration:none;}
a:hover{color:var(--accent);}
.container-nc{width:100%;max-width:1180px;margin:0 auto;padding:0 22px;}
.section{padding:78px 0;border-bottom:1px solid var(--line);}
.section:last-of-type{border-bottom:0;}
.eyebrow{
  display:inline-block;
  font-size:.74rem;
  font-weight:700;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--main);
  margin-bottom:14px;
}
.sec-title{font-size:clamp(1.6rem,3.4vw,2.5rem);line-height:1.2;font-weight:900;}
.sec-sub{color:var(--muted);font-size:.98rem;max-width:640px;margin-top:14px;font-weight:400;}

/* ---------- NAV ---------- */
.nc-nav{
  background:rgba(255,241,245,.9);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:999;
}
.nc-nav .inner{display:flex;align-items:center;justify-content:space-between;height:66px;}
.nc-brand{
  font-weight:900;
  font-size:1.28rem;
  color:var(--ink);
  letter-spacing:-0.03em;
  display:flex;align-items:center;gap:8px;
}
.nc-brand i{color:var(--main);font-size:1rem;}
.nc-brand:hover{color:var(--main);}
.nc-links{display:flex;align-items:center;gap:26px;}
.nc-links a{
  font-size:.9rem;font-weight:600;color:var(--ink);
  padding:6px 0;position:relative;
}
.nc-links a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--main);transition:width .28s ease;
}
.nc-links a:hover::after{width:100%;}
.nc-links a:hover{color:var(--main);}
.nc-toggle{
  display:none;background:none;border:1px solid var(--line);
  border-radius:6px;padding:6px 11px;color:var(--ink);font-size:1rem;
}
@media(max-width:880px){
  .nc-toggle{display:block;}
  .nc-links{
    display:none;position:absolute;top:66px;left:0;right:0;
    flex-direction:column;align-items:flex-start;gap:0;
    background:#fff;border-bottom:1px solid var(--line);padding:10px 22px 18px;
  }
  .nc-links.open{display:flex;}
  .nc-links a{width:100%;padding:12px 0;border-bottom:1px solid var(--line);}
}

/* ---------- HERO ---------- */
.hero{padding:96px 0 82px;position:relative;overflow:hidden;border-bottom:1px solid var(--line);}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:52px;align-items:center;}
@media(max-width:900px){.hero-grid{grid-template-columns:1fr;gap:38px;}}
.hero h1{
  font-size:clamp(2.1rem,5.2vw,3.7rem);
  line-height:1.1;font-weight:900;
}
.grad-text{
  background:linear-gradient(96deg,var(--main) 0%,var(--accent) 55%,var(--main) 100%);
  background-size:220% 100%;
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
  animation:flow 7s linear infinite;
}
@keyframes flow{
  0%{background-position:0% 50%;}
  100%{background-position:220% 50%;}
}
.hero p.lead-nc{
  color:var(--muted);font-size:1.06rem;margin:22px 0 0;max-width:540px;font-weight:400;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px;}
.btn-nc{
  display:inline-flex;align-items:center;gap:9px;
  padding:13px 28px;border-radius:999px;font-weight:700;font-size:.94rem;
  border:1px solid var(--main);color:#fff;background:var(--main);
  position:relative;overflow:hidden;transition:transform .25s ease,box-shadow .25s ease;
}
.btn-nc::before{
  content:"";position:absolute;top:0;left:-120%;width:60%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.55),transparent);
  transition:left .6s ease;transform:skewX(-20deg);
}
.btn-nc:hover::before{left:140%;}
.btn-nc:hover{color:#fff;transform:translateY(-2px);}
.btn-ghost{
  background:transparent;color:var(--main);border:1px solid var(--main);
}
.btn-ghost:hover{background:var(--main);color:#fff;}

.hero-float{
  position:relative;min-height:280px;
}
.float-card{
  position:absolute;border:1px solid var(--line);border-radius:14px;
  background:#fff;padding:16px 18px;font-size:.86rem;font-weight:600;
  animation:bob 6s ease-in-out infinite;
}
.float-card i{color:var(--main);margin-right:7px;}
.fc1{top:6%;left:2%;animation-delay:0s;}
.fc2{top:40%;left:16%;animation-delay:1.3s;}
.fc3{top:72%;left:0;animation-delay:2.6s;}
.fc4{top:20%;right:4%;animation-delay:.8s;}
@keyframes bob{
  0%,100%{transform:translateY(0);}
  50%{transform:translateY(-13px);}
}
@media(max-width:900px){
  .hero-float{min-height:230px;}
  .fc2{left:26%;}
  .fc4{right:0;}
}

/* ---------- STATS ---------- */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  border:1px solid var(--line);border-radius:16px;overflow:hidden;background:#fff;
}
.stat{padding:34px 24px;border-right:1px solid var(--line);}
.stat:last-child{border-right:0;}
.stat .num{
  font-size:clamp(1.9rem,4vw,2.9rem);font-weight:900;letter-spacing:-0.04em;
  color:var(--main);line-height:1;
}
.stat .lbl{font-size:.82rem;color:var(--muted);margin-top:10px;font-weight:600;letter-spacing:.04em;}
@media(max-width:760px){
  .stats{grid-template-columns:repeat(2,1fr);}
  .stat:nth-child(2){border-right:0;}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line);}
}

/* ---------- TIMELINE ---------- */
.timeline{position:relative;margin-top:52px;padding-left:34px;}
.timeline::before{
  content:"";position:absolute;left:7px;top:8px;bottom:8px;width:1px;background:var(--line);
}
.tl-item{position:relative;padding-bottom:42px;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";position:absolute;left:-34px;top:7px;width:15px;height:15px;border-radius:50%;
  background:var(--bg);border:2px solid var(--main);
}
.tl-step{font-size:.76rem;font-weight:800;letter-spacing:.16em;color:var(--accent);text-transform:uppercase;}
.tl-item h4{font-size:1.14rem;font-weight:800;margin:8px 0 8px;}
.tl-item p{color:var(--muted);margin:0;font-size:.95rem;max-width:680px;}

/* ---------- FEATURE TABS ---------- */
.tabs-bar{
  display:flex;flex-wrap:wrap;gap:10px;margin-top:34px;border-bottom:1px solid var(--line);padding-bottom:0;
}
.tab-btn{
  background:none;border:0;border-bottom:2px solid transparent;
  padding:11px 4px;margin-right:22px;font-weight:700;font-size:.94rem;color:var(--muted);
  transition:color .2s ease,border-color .2s ease;
}
.tab-btn.active{color:var(--main);border-bottom-color:var(--main);}
.tab-btn:hover{color:var(--main);}
.tab-pane{display:none;padding-top:38px;}
.tab-pane.active{display:block;animation:fadeUp .5s ease both;}
@keyframes fadeUp{from{opacity:0;transform:translateY(14px);}to{opacity:1;transform:translateY(0);}}
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:1px solid var(--line);border-radius:16px;overflow:hidden;background:#fff;}
.feat-cell{padding:30px 26px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);}
.feat-cell:nth-child(3n){border-right:0;}
.feat-cell:nth-last-child(-n+3){border-bottom:0;}
.feat-cell i{font-size:1.3rem;color:var(--main);}
.feat-cell h5{font-size:1.02rem;font-weight:800;margin:14px 0 8px;}
.feat-cell p{font-size:.9rem;color:var(--muted);margin:0;}
@media(max-width:820px){
  .feat-grid{grid-template-columns:1fr;}
  .feat-cell{border-right:0!important;}
  .feat-cell:nth-last-child(-n+3){border-bottom:1px solid var(--line);}
  .feat-cell:last-child{border-bottom:0;}
}

/* ---------- FAQ ---------- */
.faq-wrap{margin-top:34px;border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;background:none;border:0;text-align:left;
  padding:24px 42px 24px 0;font-weight:700;font-size:1.02rem;color:var(--ink);
  position:relative;cursor:pointer;
}
.faq-q::after{
  content:"\f067";font-family:"Font Awesome 6 Free";font-weight:900;
  position:absolute;right:8px;top:50%;transform:translateY(-50%);
  color:var(--main);font-size:.85rem;transition:transform .3s ease;
}
.faq-item.open .faq-q::after{transform:translateY(-50%) rotate(45deg);}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .38s ease;
  color:var(--muted);font-size:.95rem;
}
.faq-item.open .faq-a{max-height:360px;}
.faq-a-inner{padding:0 40px 26px 0;}

/* ---------- CTA ---------- */
.cta-box{
  border:1px solid var(--main);border-radius:18px;padding:56px 40px;text-align:center;
  background:linear-gradient(160deg,#fff 0%,#fff1f5 100%);
}
.cta-box h2{font-size:clamp(1.5rem,3.6vw,2.3rem);font-weight:900;}
.cta-box p{color:var(--muted);margin:16px auto 30px;max-width:560px;}

/* ---------- FRIENDS ---------- */
.friendzone{padding:56px 0;border-top:1px solid var(--line);}
.friendzone h6{
  font-size:.76rem;font-weight:800;letter-spacing:.2em;text-transform:uppercase;
  color:var(--muted);margin-bottom:16px;
}
.friend-links{
  font-size:.9rem;color:var(--muted);line-height:2.1;
  border:1px dashed var(--line);border-radius:12px;padding:20px 22px;background:#fff;
}

/* ---------- FOOTER ---------- */
footer.site-foot{
  border-top:1px solid var(--line);padding:44px 0 40px;background:#fff;
}
.foot-row{display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:space-between;}
.foot-brand{font-weight:900;font-size:1.06rem;color:var(--ink);}
.foot-links{display:flex;flex-wrap:wrap;gap:20px;font-size:.86rem;}
.foot-links a{color:var(--muted);font-weight:500;}
.foot-links a:hover{color:var(--main);}
.copy{color:var(--muted);font-size:.82rem;}

/* ---------- REVEAL ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease;}
.reveal.in{opacity:1;transform:translateY(0);}

.muted-note{color:var(--muted);font-size:.88rem;}

/* --- 子页面追加 --- */
/* 本页专属的少量补充样式 */
  .guide-hero { padding: 96px 0 56px; }
.guide-hero h1 { font-size: clamp(28px, 4.4vw, 52px); font-weight: 900; line-height: 1.18; letter-spacing: -.02em; margin: 14px 0 18px; }
.guide-hero p.lead { color: var(--muted); font-size: 17px; line-height: 1.9; max-width: 720px; }
.step-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; margin-top: 34px; }
.step-card {
    background: #fff; border: 1px solid var(--line); border-radius: 18px;
    padding: 26px 24px 24px; position: relative; transition: .25s ease;
  }
.step-card:hover { transform: translateY(-4px); box-shadow: 0 18px 40px rgba(219,39,119,.14); border-color: var(--main); }
.step-no {
    display: inline-flex; align-items: center; justify-content: center;
    width: 38px; height: 38px; border-radius: 12px; font-weight: 800; font-size: 16px;
    background: linear-gradient(135deg, var(--main), var(--accent)); color: #fff; margin-bottom: 14px;
  }
.step-card h3 { font-size: 17px; font-weight: 800; color: var(--ink); margin: 0 0 10px; }
.step-card p { font-size: 14.5px; line-height: 1.85; color: var(--muted); margin: 0; }
.qa-list { margin-top: 30px; display: grid; gap: 14px; }
.qa-item { background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 22px 24px; }
.qa-item h3 { font-size: 16px; font-weight: 800; color: var(--ink); margin: 0 0 10px; display: flex; gap: 10px; align-items: flex-start; }
.qa-item h3 i { color: var(--main); margin-top: 3px; }
.qa-item p { font-size: 14.5px; line-height: 1.9; color: var(--muted); margin: 0; }
.qa-item code {
    background: var(--bg); border: 1px solid var(--line); color: var(--main);
    padding: 1px 7px; border-radius: 6px; font-size: 13px; font-weight: 600;
  }
.tip-band {
    margin-top: 40px; background: linear-gradient(135deg, rgba(219,39,119,.08), rgba(244,63,94,.05));
    border: 1px dashed var(--line); border-radius: 18px; padding: 26px 26px;
  }
.tip-band h3 { font-size: 17px; font-weight: 800; color: var(--ink); margin: 0 0 14px; }
.tip-band ul { margin: 0; padding-left: 20px; }
.tip-band li { font-size: 14.5px; line-height: 1.95; color: var(--ink); opacity: .82; }
.device-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 18px; margin-top: 32px; }
.device-card { background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 24px; }
.device-card .di { font-size: 22px; color: var(--main); margin-bottom: 12px; }
.device-card h3 { font-size: 16px; font-weight: 800; color: var(--ink); margin: 0 0 10px; }
.device-card p { font-size: 14px; line-height: 1.85; color: var(--muted); margin: 0; }

/* --- 子页面追加 --- */
/* ===== 本页专属少量样式（其余复用站点样式表） ===== */
.sm-hero {padding:64px 0 28px;}
.sm-hero h1 {font-size:clamp(30px,5vw,48px);line-height:1.18;font-weight:800;letter-spacing:-.5px;margin:14px 0 14px;}
.sm-hero p {max-width:680px;color:var(--muted);font-size:16px;line-height:1.85;}
.sm-grid {display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;}
.sm-card {background:#fff;border:1px solid var(--line);border-radius:20px;padding:26px 26px 22px;box-shadow:0 10px 30px rgba(219,39,119,.06);transition:.25s;}
.sm-card:hover {transform:translateY(-4px);box-shadow:0 16px 40px rgba(219,39,119,.13);}
.sm-card-head {display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.sm-card-head .ico {width:44px;height:44px;flex:0 0 44px;border-radius:13px;display:grid;place-items:center;font-size:18px;color:#fff;background:linear-gradient(135deg,var(--main),var(--accent));}
.sm-card-head h3 {font-size:17px;font-weight:700;margin:0;color:var(--ink);}
.sm-card-head span {display:block;font-size:12.5px;color:var(--muted);font-weight:400;margin-top:2px;}
.sm-list {list-style:none;margin:0;padding:0;}
.sm-list li {margin-bottom:9px;}
.sm-list li:last-child {margin-bottom:0;}
.sm-list a {display:flex;align-items:center;gap:9px;color:var(--ink);text-decoration:none;font-size:14.5px;padding:9px 12px;border-radius:11px;border:1px solid transparent;transition:.2s;}
.sm-list a:hover {background:var(--bg);border-color:var(--line);color:var(--main);}
.sm-list a i {font-size:12px;color:var(--accent);}
.sm-list a .tag {margin-left:auto;font-size:11.5px;color:var(--main);background:rgba(219,39,119,.09);border-radius:999px;padding:2px 10px;font-weight:600;}
.sm-note {margin-top:34px;background:linear-gradient(135deg,rgba(219,39,119,.07),rgba(244,63,94,.05));border:1px dashed var(--line);border-radius:20px;padding:26px 28px;}
.sm-note h3 {font-size:16.5px;font-weight:700;color:var(--ink);margin:0 0 10px;}
.sm-note p {color:var(--muted);font-size:14.5px;line-height:1.85;margin:0;}
.sm-anchor-grid {display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:8px;}
.sm-anchor {display:block;text-align:center;text-decoration:none;background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px 10px;color:var(--ink);font-size:14px;font-weight:600;transition:.22s;}
.sm-anchor:hover {border-color:var(--main);color:var(--main);transform:translateY(-3px);box-shadow:0 12px 26px rgba(219,39,119,.12);}
.sm-anchor i {display:block;font-size:19px;color:var(--accent);margin-bottom:9px;}
.sm-grid {grid-template-columns:1fr;}
.sm-anchor-grid {grid-template-columns:repeat(2,minmax(0,1fr));}
.sm-hero {padding:40px 0 18px;}