/* ═══ 功能详情页共享样式（与首页同一套设计令牌） ═══ */
:root{
  --bg:#1A1E2A; --bg2:#222837; --surface:#1F2530;
  --card:rgba(255,255,255,.04); --cardSolid:#262C3A;
  --stroke:rgba(255,255,255,.10); --stroke2:rgba(255,255,255,.20);
  --text:#EEF0FF; --text2:rgba(238,240,255,.62); --text3:rgba(238,240,255,.32);
  --brand:#F5B642; --brandDeep:#C68A1E; --amber:#FAC775;
  --coral:#ff7a8c; --mint:#5ad6a0;
  --r-sm:8px; --r-md:14px; --r-lg:20px; --r-xl:28px; --r-full:999px;
  --ease:cubic-bezier(.22,.61,.36,1); --ease-spring:cubic-bezier(.34,1.56,.64,1);
  --t:.45s; --t-fast:.22s;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);line-height:1.65;overflow-x:hidden;
  font-family:"Segoe UI Variable","Segoe UI","PingFang SC","Microsoft YaHei UI",sans-serif;
  -webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
::selection{background:var(--brand);color:#1A1E2A}
.wrap{max-width:1080px;margin:0 auto;padding:0 32px}

/* 顶栏（与首页一致） */
nav.top{position:fixed;top:0;left:0;right:0;z-index:100;padding:16px 0;
  transition:background var(--t) var(--ease),backdrop-filter var(--t),padding var(--t) var(--ease)}
nav.top.scrolled{background:rgba(26,30,42,.78);backdrop-filter:blur(20px) saturate(180%);
  padding:8px 0;border-bottom:1px solid var(--stroke)}
.top-in{max-width:1320px;margin:0 auto;padding:0 32px;display:flex;align-items:center;gap:30px}
.logo img{height:34px;width:auto;display:block;border-radius:8px}
.nav-links{display:flex;gap:24px;font-size:14px;color:var(--text2);align-items:center}
.nav-links a:hover{color:var(--text)}
.nav-right{margin-left:auto;display:flex;gap:12px;align-items:center}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:9px 18px;
  border-radius:var(--r-full);font-size:13.5px;font-weight:600;border:none;cursor:pointer;
  transition:transform var(--t-fast) var(--ease-spring),box-shadow var(--t) var(--ease),background var(--t) var(--ease)}
.btn:active{transform:scale(.96)}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--stroke2)}
.btn-ghost:hover{background:rgba(255,255,255,.06)}
.btn-amber{background:linear-gradient(135deg,var(--brand),var(--brandDeep));color:#1A1E2A;
  box-shadow:0 6px 22px rgba(245,182,66,.32);font-weight:700}
.btn-amber:hover{box-shadow:0 10px 32px rgba(245,182,66,.5);transform:translateY(-2px)}

/* Hero */
.fhero{position:relative;overflow:hidden;padding:150px 0 70px;
  border-bottom:1px solid var(--stroke);background:#0E1320}
.fhero-in{position:relative;z-index:3}
.aurora{position:absolute;inset:0;pointer-events:none;opacity:0;transition:opacity .9s var(--ease)}
.aurora.on{opacity:.55}
.aurora::before{content:"";position:absolute;right:-20%;top:-30%;width:70%;height:150%;
  filter:blur(120px) saturate(130%);
  background:conic-gradient(from 0deg,#5ad6a0,#2540ff,#9a8bff,#7c3aed,#5ad6a0);
  animation:spin 26s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.fback{display:inline-block;font-size:13px;color:var(--text2);margin-bottom:26px;
  transition:color var(--t-fast),transform var(--t-fast)}
.fback:hover{color:var(--brand);transform:translateX(-3px)}
.fico{width:58px;height:58px;border-radius:16px;display:grid;place-items:center;
  color:#fff;font-size:25px;font-weight:700;margin-bottom:18px;
  box-shadow:0 12px 30px rgba(0,0,0,.35)}
.fico.sm{width:38px;height:38px;border-radius:11px;font-size:17px;margin:0}
.ico-blue{background:linear-gradient(135deg,#2540ff,#1e6bff)}
.ico-violet{background:linear-gradient(135deg,#7c3aed,#9a8bff)}
.ico-coral{background:linear-gradient(135deg,#ff7a8c,#ff9f6b)}
.ico-mint{background:linear-gradient(135deg,#5ad6a0,#34d399)}
.ico-amber{background:linear-gradient(135deg,#F5B642,#F59E0B);color:#1A1E2A}
.ftag{font-size:12.5px;font-weight:600;letter-spacing:1.4px;text-transform:uppercase;
  color:var(--brand);margin-bottom:12px}
.fhero h1{font-size:clamp(30px,4.4vw,50px);line-height:1.12;letter-spacing:-1.4px;font-weight:700;max-width:820px}
.fsub{font-size:16.5px;color:var(--text2);margin:20px 0 26px;max-width:760px}
.facts{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:32px}
.fchip{padding:7px 15px;border-radius:var(--r-full);background:var(--card);
  border:1px solid var(--stroke);font-size:12.5px;color:var(--text2)}
.fcta-row{display:flex;gap:12px;flex-wrap:wrap}

/* Sections */
.fsec{padding:64px 0 8px}
.fsec h2{font-size:clamp(21px,2.5vw,29px);letter-spacing:-.6px;font-weight:700;margin-bottom:24px}
.fgrid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.fcard{background:var(--card);border:1px solid var(--stroke);border-radius:var(--r-md);
  padding:20px 22px;transition:transform var(--t) var(--ease),border-color var(--t),background var(--t)}
.fcard:hover{transform:translateY(-4px);border-color:var(--stroke2);background:rgba(255,255,255,.06)}
.fcard h3{font-size:15px;font-weight:600;margin-bottom:7px}
.fcard p{font-size:13.5px;color:var(--text2)}
.fsteps{list-style:none;display:grid;gap:12px;counter-reset:s}
.fsteps li{display:flex;gap:14px;align-items:flex-start;background:var(--card);
  border:1px solid var(--stroke);border-radius:var(--r-md);padding:15px 18px;font-size:14px}
.fsteps .n{flex:none;width:26px;height:26px;border-radius:50%;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--brandDeep));color:#1A1E2A;
  font-size:12.5px;font-weight:700;margin-top:1px}
.fpoints{list-style:none;display:grid;gap:11px}
.fpoints li{position:relative;padding-left:24px;font-size:14px;color:var(--text2)}
.fpoints li::before{content:"";position:absolute;left:0;top:9px;width:7px;height:7px;
  border-radius:50%;background:var(--mint)}
.fshot{margin:0;border:1px solid var(--stroke2);border-radius:var(--r-lg);overflow:hidden;
  background:#0B1120}
.fshot img{width:100%;display:block}
.fshot figcaption{padding:13px 18px;font-size:13px;color:var(--text3);border-top:1px solid var(--stroke)}

/* 相关功能 */
.frels{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.frel{display:flex;align-items:center;gap:14px;background:var(--card);border:1px solid var(--stroke);
  border-radius:var(--r-md);padding:15px 18px;transition:transform var(--t) var(--ease),border-color var(--t)}
.frel:hover{transform:translateX(5px);border-color:var(--brand)}
.frel b{display:block;font-size:14px;font-weight:600}
.frel em{font-style:normal;font-size:11.5px;color:var(--text3);letter-spacing:.6px;text-transform:uppercase}
.frel i{margin-left:auto;color:var(--brand);font-style:normal;font-weight:700}

/* 收尾 CTA */
.fend{padding:70px 0 90px}
.fend-in{background:linear-gradient(135deg,rgba(245,182,66,.14),rgba(198,138,30,.10));
  border:1px solid var(--stroke2);border-radius:var(--r-xl);padding:48px 32px;text-align:center}
.fend-in h2{font-size:clamp(21px,2.6vw,32px);margin-bottom:12px}
.fend-in p{color:var(--text2);margin-bottom:24px;font-size:15px}

footer{border-top:1px solid var(--stroke);padding:38px 0;font-size:13px;color:var(--text3);margin-top:20px}
.foot{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;align-items:center}
.foot-links{display:flex;gap:20px}
.foot-links a:hover{color:var(--brand)}

.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* 首页「全部功能」网格（注入 index-v3.html 用） */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.fcard-link{position:relative;display:flex;flex-direction:column}
.fcard-link .go{margin-top:auto;padding-top:14px;font-size:12.5px;font-weight:600;color:var(--brand);
  opacity:0;transform:translateX(-6px);transition:opacity var(--t) var(--ease),transform var(--t) var(--ease)}
.fcard-link:hover .go{opacity:1;transform:none}
@media (max-width:960px){
  .nav-links{display:none}
  .fgrid,.frels{grid-template-columns:1fr}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:560px){ .feature-grid{grid-template-columns:1fr} }
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms!important;transition-duration:.01ms!important}
  .reveal{opacity:1;transform:none}
}