:root {
  --bg: #f5f7fb;
  --bg-soft: #eef2f8;
  --card: #ffffff;
  --ink: #131a2b;
  --sub: #44506a;
  --muted: #6b7689;
  --dim: #98a2b5;
  --green: #14b58f;
  --blue: #3a74e8;
  --indigo: #5a57d6;
  --hair: rgba(20,30,60,0.08);
  --font: "PingFang SC", -apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue", Arial, sans-serif;
  --soft: 0 24px 60px rgba(30,42,72,0.12);
  --soft-sm: 0 14px 36px rgba(30,42,72,0.09);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; color: var(--ink);
  background:
    radial-gradient(900px 460px at 8% -4%, rgba(58,116,232,0.08), transparent 60%),
    radial-gradient(820px 440px at 98% 0%, rgba(20,181,143,0.08), transparent 58%),
    var(--bg);
  font-family: var(--font); font-size: 16px; line-height: 1.65; -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
h1,h2,h3,h4,p { margin: 0; }
img { display: block; max-width: 100%; }
.en .i-zh { display: none; }
body:not(.en) .i-en { display: none; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 28px; }

/* nav */
.topnav {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1120px; margin: 0 auto; padding: 20px 28px;
  background: rgba(245,247,251,0.75); backdrop-filter: blur(14px);
}
.brand { display: flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 600; }
.brand img { width: 28px; height: 28px; }
.nav-right { display: flex; align-items: center; gap: 22px; }
.nav-right a.link { color: var(--muted); font-size: 14.5px; transition: color .15s; }
.nav-right a.link:hover { color: var(--ink); }
.lang { display: inline-flex; align-items: center; gap: 6px; font-size: 13.5px; color: var(--sub); cursor: pointer;
  padding: 7px 13px; border-radius: 999px; background: rgba(20,30,60,0.05); transition: background .15s; }
.lang:hover { background: rgba(20,30,60,0.1); }

/* buttons */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 13px 26px; border-radius: 999px;
  font-size: 15px; font-weight: 600; background: var(--ink); color: #fff; transition: transform .15s, box-shadow .15s;
  box-shadow: 0 12px 28px rgba(19,26,43,0.18); }
.btn:hover { transform: translateY(-2px); }
.btn.primary { background: linear-gradient(135deg, var(--green), #13a6bd); color: #fff; box-shadow: 0 16px 34px rgba(20,181,143,0.30); }
.btn.ghost { background: #fff; color: var(--ink); box-shadow: var(--soft-sm); }
.btn.ghost:hover { box-shadow: var(--soft); }

/* hero */
.hero { padding: 64px 0 30px; text-align: center; }
.eyebrow { display: inline-block; color: var(--sub); font-size: 13px; font-weight: 600; letter-spacing: 1.5px;
  padding: 7px 16px; border-radius: 999px; background: #fff; box-shadow: var(--soft-sm); margin-bottom: 30px; }
.eyebrow b { color: var(--green); }
.hero h1 { font-size: clamp(40px, 6.4vw, 74px); font-weight: 700; line-height: 1.06; letter-spacing: -1.5px; margin: 0 auto 26px; max-width: 14ch; }
.hero h1 .g { background: linear-gradient(120deg, var(--green), var(--blue)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .lede { max-width: 620px; margin: 0 auto 36px; font-size: 19px; color: var(--muted); }
.hero .cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* hero stage：醒目深色块 + 产品 mockup（浅底上压深块，对比强） */
/* Hero 截图：直接平实呈现，像真从电脑上截的（细窗口边 + 真实投影），不做深色舞台 */
.stage { margin: 56px auto 0; max-width: 1000px; }
.stage .shot-real { width: 100%; display: block; border-radius: 11px;
  border: 1px solid rgba(20,30,60,0.10);
  box-shadow: 0 30px 64px rgba(30,42,72,0.20), 0 4px 14px rgba(30,42,72,0.10); }

/* section */
.section { padding: 100px 0; }
.section.tight { padding: 70px 0; }
.sec-head { text-align: center; max-width: 720px; margin: 0 auto 54px; }
.sec-head .kick { color: var(--green); font-size: 13px; font-weight: 600; letter-spacing: 2px; text-transform: uppercase; }
.sec-head h2 { font-size: clamp(30px, 4vw, 44px); font-weight: 700; letter-spacing: -0.8px; line-height: 1.12; margin-top: 14px; }
.sec-head p { color: var(--muted); font-size: 17px; margin-top: 16px; }

/* ecosystem funnel */
.eco { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; align-items: center; gap: 12px; }
.eco .cap { color: var(--muted); font-size: 14px; }
.eco .cap b { color: var(--green); } .eco .cap.low b { color: var(--blue); }
.tier { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 20px 28px; border-radius: 18px; background: var(--card); box-shadow: var(--soft-sm); }
.tier .nm { font-size: 17px; font-weight: 640; } .tier .rl { font-size: 12.5px; color: var(--muted); margin-top: 3px; }
.tier .tg { font-size: 12.5px; font-weight: 600; color: var(--blue); }
.tier.w1 { width: 58%; } .tier.w2 { width: 72%; } .tier.w3 { width: 86%; } .tier.w4 { width: 100%; }
.tier.hot { background: linear-gradient(135deg, rgba(20,181,143,0.12), var(--card)); }
.tier.hot .nm, .tier.hot .tg { color: var(--green); }
.eco .engine { width: 100%; margin-top: 8px; text-align: center; padding: 16px; border-radius: 16px;
  background: var(--bg-soft); color: var(--sub); font-size: 13.5px; }
.eco .engine b { color: var(--green); }

/* product showcase：大留白 + 柔和阴影，无硬边框 */
.show { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; max-width: 1040px; margin: 0 auto 110px; }
.show:last-child { margin-bottom: 0; }
.show.rev .pic { order: 2; }
.show .pic { border-radius: 10px; overflow: hidden; background: #fff;
  border: 1px solid rgba(20,30,60,0.09); box-shadow: 0 18px 44px rgba(30,42,72,0.14); }
.show .pic img { width: 100%; }
.show.small { grid-template-columns: 360px 1fr; gap: 56px; }
.show.small .pic { box-shadow: 0 14px 34px rgba(30,42,72,0.12); }
.show.small .pic img { max-height: 380px; width: auto; margin: 0 auto; }
.badge { display: inline-block; font-size: 12px; font-weight: 600; color: var(--green);
  background: rgba(20,181,143,0.12); padding: 5px 13px; border-radius: 999px; margin-bottom: 16px; }
.badge.b { color: var(--blue); background: rgba(58,116,232,0.12); }
.show h3 { font-size: 30px; font-weight: 700; letter-spacing: -0.5px; margin-bottom: 14px; }
.show .txt > p { color: var(--muted); font-size: 16px; line-height: 1.7; margin-bottom: 18px; }
.show ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 11px; }
.show li { color: var(--sub); font-size: 14.5px; padding-left: 24px; position: relative; }
.show li::before { content: ""; position: absolute; left: 0; top: 8px; width: 8px; height: 8px; border-radius: 50%; background: var(--green); }
.plat { display: inline-block; margin-top: 20px; font-size: 12.5px; color: var(--dim); }

/* 生态伙伴横栏 */
.partner { max-width: 1040px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between;
  gap: 28px; flex-wrap: wrap; padding: 30px 36px; border-radius: 22px; background: var(--card); box-shadow: var(--soft-sm); }
.partner .pt { font-size: 12px; font-weight: 600; color: var(--green); background: rgba(20,181,143,0.12); padding: 4px 12px; border-radius: 999px; }
.partner h3 { font-size: 19px; font-weight: 640; margin: 10px 0 6px; }
.partner p { color: var(--muted); font-size: 14px; }
.partner .items { display: flex; gap: 12px; flex-wrap: wrap; }
.partner .it { display: flex; align-items: center; gap: 9px; padding: 11px 16px; border-radius: 14px; background: var(--bg-soft); font-size: 13px; color: var(--sub); }
.partner .it .d { width: 8px; height: 8px; border-radius: 50%; background: var(--green); }
.partner .it .d.b { background: var(--blue); }

/* journey */
.journey { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; max-width: 1040px; margin: 0 auto; }
.step { padding: 28px 24px; border-radius: 20px; background: var(--card); box-shadow: var(--soft-sm); }
.step .n { width: 34px; height: 34px; border-radius: 11px; display: grid; place-items: center; font-weight: 700; color: #fff; background: var(--blue); margin-bottom: 16px; }
.step:last-child .n { background: var(--green); }
.step h4 { font-size: 16.5px; font-weight: 640; margin-bottom: 7px; }
.step p { color: var(--muted); font-size: 13px; }

/* why */
.why { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; max-width: 1040px; margin: 0 auto; }
.why .c { padding: 32px 28px; border-radius: 22px; background: var(--card); box-shadow: var(--soft-sm); }
.why .tile { width: 40px; height: 40px; border-radius: 13px; background: linear-gradient(135deg,var(--green),#13a6bd); margin-bottom: 18px; }
.why .c:nth-child(2) .tile { background: linear-gradient(135deg,var(--blue),var(--indigo)); }
.why h3 { font-size: 19px; font-weight: 640; margin-bottom: 9px; }
.why p { color: var(--muted); font-size: 14.5px; }

/* more / iOS */
.mini { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; max-width: 760px; margin: 0 auto; }
.mini .m { display: flex; gap: 16px; padding: 22px; border-radius: 18px; background: var(--card); box-shadow: var(--soft-sm); }
.mini .m img { width: 50px; height: 50px; border-radius: 13px; }
.mini .m h4 { font-size: 16px; font-weight: 640; margin-bottom: 5px; }
.mini .m p { color: var(--muted); font-size: 13px; }
.mini .m .pl { font-size: 11px; color: var(--dim); }

/* cta：深色对比块 */
.cta-sec { max-width: 1040px; margin: 0 auto; text-align: center; padding: 72px 40px; border-radius: 30px; color: #fff;
  background: radial-gradient(700px 280px at 50% 0%, rgba(93,91,221,0.5), transparent 65%), linear-gradient(150deg,#1a1b46,#0e2f33);
  box-shadow: 0 40px 90px rgba(30,42,72,0.28); }
.cta-sec h2 { font-size: clamp(28px,3.6vw,40px); font-weight: 700; letter-spacing: -0.6px; margin-bottom: 14px; }
.cta-sec p { color: rgba(255,255,255,0.8); margin-bottom: 30px; font-size: 17px; }
.cta-sec .cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.cta-sec .btn.ghost { background: rgba(255,255,255,0.1); color: #fff; box-shadow: none; }
.cta-sec .btn.ghost:hover { background: rgba(255,255,255,0.18); }

/* footer */
.foot { max-width: 1120px; margin: 60px auto 0; padding: 40px 28px 60px; color: var(--dim); font-size: 13px;
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; border-top: 1px solid var(--hair); }
.foot a { color: var(--muted); } .foot a:hover { color: var(--ink); }
.foot .fb { display: flex; align-items: center; gap: 8px; }
.foot .fb img { width: 20px; height: 20px; }

/* responsive */
@media (max-width: 880px) {
  .show, .show.small { grid-template-columns: 1fr; gap: 28px; }
  .show.rev .pic { order: 0; }
  .journey { grid-template-columns: repeat(2,1fr); }
  .why { grid-template-columns: 1fr; }
  .section { padding: 72px 0; }
}
@media (max-width: 600px) {
  .stage { padding: 24px 24px 0; border-radius: 22px; }
  .journey, .mini { grid-template-columns: 1fr; }
  .nav-right a.link { display: none; }
  .cta-sec { padding: 48px 24px; }
}