/* Edge 中文站 · design tokens follow the Edge brandbook v1.2 */
@font-face{font-family:"Inter";src:url("fonts/inter-regular.woff2") format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"Inter";src:url("fonts/inter-semibold.woff2") format("woff2");font-weight:600;font-display:swap}
@font-face{font-family:"Inter";src:url("fonts/inter-bold.woff2") format("woff2");font-weight:700;font-display:swap}
@font-face{font-family:"Inter";src:url("fonts/inter-extrabold.woff2") format("woff2");font-weight:800;font-display:swap}

:root{
  --red:#F9423A; --red-80:#FA554E; --red-60:#FB8E89; --red-40:#FDB3B0; --pink:#FDE9E8;
  --ink:#232222; --ink-80:#393939; --grey:#585858; --grey-60:#9B9B9B; --line:#E6E6E6;
  --bg:#FFFFFF; --bg-2:#F8F8F8; --bg-3:#EDEDED;
  --font:"Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",system-ui,sans-serif;
  --r-s:6px; --r-m:12px; --r-l:20px;
  --shadow-1:0 1px 2px rgba(35,34,34,.06);
  --shadow-2:0 8px 30px rgba(35,34,34,.08);
  --ease:cubic-bezier(.2,.7,.2,1);
  --wrap:1200px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font);color:var(--ink);background:var(--bg);font-size:17px;line-height:1.75;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 32px}
.num{font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.red{color:var(--red)}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:#fff;padding:8px 14px;border-radius:var(--r-s);z-index:99}
.skip:focus{left:8px}

/* header */
header.top{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);backdrop-filter:saturate(1.4) blur(12px);-webkit-backdrop-filter:saturate(1.4) blur(12px);border-bottom:1px solid transparent;transition:border-color .3s}
header.top.scrolled{border-bottom-color:var(--line)}
.nav{display:flex;align-items:center;gap:28px;height:72px}
.nav .logo img{height:34px;width:auto}
.nav ul{display:flex;gap:26px;list-style:none;margin-left:auto}
html[lang=en] body{line-height:1.65}
html[lang=en] h1{letter-spacing:-.02em;font-size:46px}
html[lang=en] h1 .nb{display:inline}
html[lang=en] h2{letter-spacing:-.015em}
.nav ul a{text-decoration:none;font-size:15px;color:var(--grey);transition:color .2s}
.nav ul a:hover{color:var(--ink)}
.lang{display:flex;gap:10px;font-size:13px;color:var(--grey-60)}
.lang a{text-decoration:none}.lang a:hover{color:var(--ink)}
.lang .on{color:var(--ink);font-weight:600}
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:16px;text-decoration:none;border-radius:999px;padding:13px 24px;transition:transform .2s var(--ease),background .2s,box-shadow .2s;white-space:nowrap}
.btn-red{background:var(--red);color:#fff;box-shadow:0 6px 20px rgba(249,66,58,.25)}
.btn-red:hover{background:#e93830;transform:translateY(-1px)}
.btn-ghost{color:var(--ink);padding-left:4px}
.btn-ghost:hover .arr{transform:translateX(4px)}
.arr{display:inline-block;transition:transform .2s var(--ease)}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-white{background:#fff;color:var(--red)}
.btn-white:hover{transform:translateY(-1px)}
.menu-btn{display:none}

/* hero */
.hero{padding:88px 0 96px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center}
.kicker{font-size:14px;font-weight:700;color:var(--red);letter-spacing:.08em;margin-bottom:20px}
h1{font-size:48px;line-height:1.3;font-weight:700;letter-spacing:.01em}
h1 .nb{display:inline-block}
.lead{font-size:19px;color:var(--grey);margin:26px 0 34px;max-width:560px}
.cta-row{display:flex;gap:18px;align-items:center;flex-wrap:wrap}
.trust{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:40px;font-size:14px;color:var(--grey)}
.trust span{display:inline-flex;align-items:center;gap:8px}
.trust span::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--red)}

/* hero panel (signature) */
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--r-l);padding:34px 34px 28px;box-shadow:var(--shadow-2)}
.panel-k{font-size:13px;font-weight:700;color:var(--red);letter-spacing:.08em}
.panel-big{font-size:76px;font-weight:800;color:var(--red);line-height:1;margin:14px 0 6px}
.panel-sub{font-size:16px;color:var(--grey)}
.bars{margin:26px 0 22px;display:grid;gap:14px}
.bar-row{display:grid;grid-template-columns:132px 1fr;gap:14px;align-items:center}
.bar-l{font-size:14px;font-weight:600;line-height:1.35}
.bar-t{position:relative;height:30px;display:flex;align-items:center}
.bar-f{height:30px;background:var(--red);border-radius:0 6px 6px 0;transition:width 1.4s var(--ease)}
.bar-v{margin-left:10px;font-weight:700;font-size:15px;white-space:nowrap}
.panel-band{background:var(--pink);border-radius:var(--r-m);padding:16px 18px;display:flex;gap:16px;align-items:center;transition:opacity .6s var(--ease),transform .6s var(--ease)}
.js .panel-band{opacity:0;transform:translateY(10px)}
.js .panel-band.on{opacity:1;transform:none}
.panel-band b.x{font-size:30px;color:var(--red);white-space:nowrap;font-weight:800}
.panel-band p{font-size:14.5px;line-height:1.55}
.panel-src{font-size:12px;color:var(--grey-60);margin-top:14px;line-height:1.5}

/* sections */
section{padding:112px 0}
section.alt{background:var(--bg-2)}
.sec-k{font-size:14px;font-weight:700;color:var(--red);letter-spacing:.08em;margin-bottom:14px}
h2{font-size:40px;line-height:1.3;font-weight:700;letter-spacing:.01em;max-width:820px}
h3{font-size:22px;line-height:1.4;font-weight:700}
.sec-lead{font-size:18px;color:var(--grey);margin-top:18px;max-width:760px}
.src{font-size:13px;color:var(--grey-60);margin-top:28px;line-height:1.6}

.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:52px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--r-m);padding:30px 28px;position:relative;overflow:hidden}
.stat::before{content:"";position:absolute;left:0;top:0;right:0;height:4px;background:var(--red)}
.stat .n{font-size:52px;font-weight:800;color:var(--red);line-height:1.1}
.stat p{color:var(--grey);margin-top:10px;font-size:16px;line-height:1.6}
.stats-4{grid-template-columns:repeat(4,1fr)}
.stats-4 .stat{background:transparent;border:0;padding:0}
.stats-4 .stat::before{display:none}
.stats-4 .n{font-size:44px;white-space:nowrap}
.sub-h{margin-top:88px}

.mistakes{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;margin-top:52px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r-m);padding:28px 24px;transition:transform .3s var(--ease),box-shadow .3s var(--ease)}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2)}
.card .k{font-size:15px;font-weight:800;color:var(--red);margin-bottom:12px}
.card h3{font-size:19px;margin-bottom:10px}
.card p{font-size:15.5px;color:var(--grey);line-height:1.7}
.alt .card{background:#fff}

.two{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start;margin-top:52px}
.advice{background:var(--pink);border-radius:var(--r-m);padding:26px 28px;margin-top:28px;font-size:17px}
.advice b{font-weight:700}
.rules{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.rule{background:#fff;border:1px solid var(--line);border-left:4px solid var(--red);border-radius:var(--r-s);padding:18px 20px}
.rule h3{font-size:17px;margin-bottom:4px}
.rule p{font-size:14.5px;color:var(--grey);line-height:1.65}
.note{font-size:14.5px;color:var(--grey);margin-top:18px}

.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:52px}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:52px}

/* dark AI section */
.dark{background:var(--ink);color:#fff}
.dark .sec-lead{color:#BCBCBC}
.dark .card{background:#2c2b2b;border-color:#3a3939}
.dark .card p{color:#BCBCBC}
.dark .card:hover{box-shadow:0 8px 30px rgba(0,0,0,.35)}
.dark .band{background:#2c2b2b;border:1px solid #3a3939;color:#fff}
.band{border-radius:var(--r-m);padding:24px 28px;margin-top:28px;font-size:17px;background:var(--pink)}

/* table */
.tbl-wrap{overflow-x:auto;margin-top:48px;border-radius:var(--r-m);border:1px solid var(--line)}
table{border-collapse:collapse;width:100%;min-width:760px;font-size:15.5px;background:#fff}
th{background:var(--red);color:#fff;text-align:left;font-weight:600;padding:16px 18px}
td{padding:16px 18px;border-top:1px solid var(--line);vertical-align:top;line-height:1.6}
tbody tr:nth-child(even){background:var(--pink)}
td:first-child{font-weight:700;white-space:nowrap}

/* timeline */
.plan{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:52px;position:relative}
.phase .when{display:inline-block;font-size:14px;font-weight:700;background:var(--pink);border-radius:999px;padding:6px 14px}
.phase:first-child .when,.phase:last-child .when{background:var(--red);color:#fff}
.phase h3{color:var(--red);font-size:24px;margin:16px 0 10px}
.phase ul{list-style:none}
.phase li{position:relative;padding-left:18px;font-size:15.5px;color:var(--grey);margin-bottom:8px;line-height:1.6}
.phase li::before{content:"";position:absolute;left:0;top:.7em;width:6px;height:6px;border-radius:50%;background:var(--red)}

/* models */
.model{display:flex;flex-direction:column}
.model .tag{font-size:13px;font-weight:700;color:var(--red);letter-spacing:.06em}
.model h3{font-size:24px;margin:8px 0 4px}
.model .meta{color:var(--red);font-size:15px;margin-bottom:14px}
.model ul{list-style:none;margin-top:4px}
.model li{position:relative;padding-left:18px;font-size:15.5px;color:var(--grey);margin-bottom:8px}
.model li::before{content:"";position:absolute;left:0;top:.75em;width:6px;height:6px;border-radius:50%;background:var(--red)}

/* bridge */
.bridge{display:grid;grid-template-columns:1fr auto 1fr;gap:28px;align-items:stretch;margin-top:52px}
.side{background:#fff;border:1px solid var(--line);border-radius:var(--r-m);padding:30px 28px;border-top:4px solid var(--red)}
.side.cc{border-top-color:#ED1D24}
.side .brand{display:flex;align-items:center;gap:10px;height:34px;margin-bottom:14px}
.side .brand img{height:30px;width:auto}
.side .brand .ccname{font-family:"Poppins",var(--font);font-size:20px}
.side h3{font-size:18px;color:var(--grey);margin-bottom:10px}
.side ul{list-style:none}
.side li{position:relative;padding-left:18px;margin-bottom:8px;font-size:15.5px}
.side li::before{content:"";position:absolute;left:0;top:.75em;width:6px;height:6px;border-radius:50%;background:var(--red)}
.side.cc li::before{background:#ED1D24}
.hub{align-self:center;width:250px;background:var(--red);color:#fff;border-radius:var(--r-m);padding:28px 24px;text-align:center;box-shadow:0 12px 34px rgba(249,66,58,.28)}
.hub b{display:block;font-size:20px;margin-bottom:6px}
.hub p{font-size:15px;line-height:1.6}
.side p.small{font-size:14.5px;color:var(--grey);margin-top:12px}

/* portals */
.portals{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:48px}
.portal{display:block;text-decoration:none;border-radius:var(--r-m);overflow:hidden;border:1px solid var(--line);background:#fff;transition:transform .3s var(--ease),box-shadow .3s var(--ease)}
.portal:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.portal img{aspect-ratio:16/10;object-fit:cover;width:100%;height:auto}
.portal .cap{padding:18px 22px;display:flex;justify-content:space-between;align-items:center;gap:12px}
.portal .cap b{font-size:18px}
.portal .cap span{font-size:14.5px;color:var(--grey)}
.selfserve{margin-top:24px;display:grid;grid-template-columns:auto 1fr;gap:20px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--r-m);padding:24px 28px}
.selfserve .ic{width:48px;height:48px;border-radius:12px;background:var(--pink);display:grid;place-items:center;color:var(--red);font-weight:800;font-size:22px}

/* about */
.clients{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}
.chip{border:1px solid var(--line);border-radius:999px;padding:8px 16px;font-size:15px;background:#fff}
.proof{margin-top:28px;padding:22px 26px;border-left:4px solid var(--red);background:var(--bg-2);border-radius:0 var(--r-m) var(--r-m) 0;font-size:16px}

/* faq */
.faq{margin-top:44px;max-width:860px}
details{border-bottom:1px solid var(--line);padding:22px 0}
summary{cursor:pointer;list-style:none;font-size:19px;font-weight:700;display:flex;justify-content:space-between;gap:20px;align-items:center}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-weight:400;font-size:28px;color:var(--red);transition:transform .3s var(--ease);line-height:1}
details[open] summary::after{transform:rotate(45deg)}
details p{margin-top:12px;color:var(--grey);font-size:16.5px}

/* contact */
.contact{background:var(--red);color:#fff}
.contact h2{color:#fff}
.contact .sec-lead{color:#FFE9E7}
.contact .sec-k{color:#fff;opacity:.85}
.people{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:44px}
.person{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.28);border-radius:var(--r-m);padding:28px 30px}
.person .org{font-size:14px;font-weight:700;letter-spacing:.06em;opacity:.85}
.person b{display:block;font-size:22px;margin:6px 0 10px}
.person a{text-decoration:none;border-bottom:1px solid rgba(255,255,255,.4)}
.person a:hover{border-bottom-color:#fff}
.person p{font-size:16px;line-height:1.9}

footer{background:var(--ink);color:#BCBCBC;padding:48px 0;font-size:14px}
.foot{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;align-items:center}
.foot img{height:30px;width:auto}
.foot a{text-decoration:none}.foot a:hover{color:#fff}

/* reveal */
.rv{transition:opacity .8s var(--ease),transform .8s var(--ease)}
.js .rv{opacity:0;transform:translateY(18px)}
.js .rv.in{opacity:1;transform:none}

@media (max-width:1080px){
  .nav ul{display:none}
  .lang{margin-left:auto}
  .hero-grid{grid-template-columns:1fr;gap:48px}
  .mistakes{grid-template-columns:repeat(2,1fr)}
  .grid4,.plan{grid-template-columns:repeat(2,1fr)}
  .stats-4{grid-template-columns:repeat(2,1fr);row-gap:36px}
  .bridge{grid-template-columns:1fr}
  .hub{width:auto}
}
@media (max-width:720px){
  body{font-size:16px}
  .wrap{padding:0 20px}
  .nav{gap:14px;height:64px}
  .nav .logo img{height:28px}
  .lang{margin-left:auto;font-size:13px}
  .hero{padding:48px 0 64px}
  h1{font-size:30px}
  .lead{font-size:17px}
  h2{font-size:30px}
  section{padding:76px 0}
  .stats,.grid3,.grid4,.plan,.mistakes,.two,.rules,.portals,.people{grid-template-columns:1fr}
  .stats-4{grid-template-columns:1fr 1fr}
  .stats.stats-4 .n{font-size:30px;white-space:nowrap}
  .panel{padding:24px 20px}
  .panel-big{font-size:56px}
  .bar-row{grid-template-columns:96px 1fr}
  .bar-l{font-size:13px}
  .stat .n{font-size:44px}
  .two{gap:36px}
  .selfserve{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
  .js .rv,.js .panel-band{opacity:1;transform:none}
}

@media (max-width:720px){html[lang=en] h1{font-size:32px}}