:root{--bg:#f6faff;--card:#fff;--ink:#12233d;--mute:#5b6b82;--line:#e1eaf5;--a:#2f6bff;--b:#12c2a5;--soft:#eaf1ff;box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#0e1626;--card:#16213a;--ink:#eaf1ff;--mute:#9db0cc;--line:#26344f;--soft:#1b2a4a}}
:root[data-theme="dark"]{--bg:#0e1626;--card:#16213a;--ink:#eaf1ff;--mute:#9db0cc;--line:#26344f;--soft:#1b2a4a}
html{scroll-padding-top:env(safe-area-inset-top,0px);scroll-behavior:smooth}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.7 -apple-system,"PingFang SC","Microsoft YaHei",Segoe UI,sans-serif}
.w{max-width:1040px;margin:0 auto;padding:0 20px}
nav{display:flex;justify-content:space-between;align-items:center;padding:18px 0}
.logo{display:block;width:148px;height:28px}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .logo{filter:brightness(0) invert(1)}}
:root[data-theme="dark"] .logo{filter:brightness(0) invert(1)}
nav a{color:var(--mute);text-decoration:none;margin-left:20px;font-size:14px}
.hero{text-align:center;padding:56px 0 48px;background:radial-gradient(60% 80% at 50% 0,var(--soft),transparent)}
h1{font-size:clamp(30px,6vw,52px);line-height:1.2;margin:0 0 14px}
h1 span{background:linear-gradient(90deg,var(--a),var(--b));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{color:var(--mute);max-width:600px;margin:0 auto 26px}
.hero-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:12px}
.btn{display:inline-block;background:var(--a);color:#fff;text-decoration:none;padding:12px 26px;border-radius:12px;font-weight:600}
.btn.ghost{background:transparent;color:var(--a);border:1px solid var(--a)}
.cta{margin:22px 0 0}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px;margin:36px 0 0}
.stat{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px}
.stat b{display:block;font-size:20px;color:var(--a)}
.stat small{color:var(--mute)}
section{padding:44px 0}
h2{font-size:28px;margin:0 0 6px}
.sub{color:var(--mute);margin:0 0 26px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:22px;box-shadow:0 6px 20px rgba(47,107,255,.06)}
.ic{width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,var(--a),var(--b));color:#fff;display:grid;place-items:center;font-size:20px;margin-bottom:12px}
.card h3{margin:0 0 6px;font-size:17px}
.card p{margin:0;color:var(--mute);font-size:14.5px}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;counter-reset:s}
.step{background:var(--soft);border-radius:16px;padding:20px;counter-increment:s}
.step:before{content:counter(s);display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--a);color:#fff;font-weight:700;margin-bottom:10px}
.step h3{margin:0 0 4px;font-size:16px}.step p{margin:0;color:var(--mute);font-size:14px}
.tips{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:24px}
.tips.mt{margin-top:20px}
.tips li{margin:8px 0;color:var(--mute)}
.tl{position:relative;margin:0;padding:0 0 0 26px;list-style:none;border-left:2px solid var(--line)}
.tl li{position:relative;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:16px 20px;margin-bottom:14px}
.tl li:before{content:"";position:absolute;left:-35px;top:22px;width:14px;height:14px;border-radius:50%;background:var(--a);border:3px solid var(--bg)}
.tl b{color:var(--a)}.tl p{margin:4px 0 0;color:var(--mute);font-size:14.5px}
details{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px 18px;margin-bottom:10px}
summary{cursor:pointer;font-weight:600}
details p{margin:10px 0 0;color:var(--mute);font-size:14.5px}

:root{--t1:#e7f0ff;--t2:#dcf7ef;--t3:#fff0dc;--t4:#f3e8ff}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--t1:#1c2c52;--t2:#14383a;--t3:#3a2e18;--t4:#2d2250}}
:root[data-theme="dark"]{--t1:#1c2c52;--t2:#14383a;--t3:#3a2e18;--t4:#2d2250}
/* 资产安全：金库式 */
.vault{display:grid;grid-template-columns:1fr 1.25fr;gap:18px;align-items:stretch}
.vhero{background:linear-gradient(165deg,rgba(6,16,40,.55),rgba(8,30,58,.16) 46%,rgba(4,18,42,.52)),url("../images/safe-bg.webp") center/cover no-repeat;color:#fff;border-radius:26px;padding:30px;display:flex;flex-direction:column;justify-content:space-between;min-height:300px}
.vhero .big{display:block;width:72px;height:72px;object-fit:contain}
.vhero h3{font-size:24px;margin:14px 0 8px}.vhero p{margin:0;opacity:.92;font-size:15px}
.layers{display:flex;flex-direction:column;gap:10px}
.layer{--lc:47,107,255;--lk:var(--a);--wash:.14;--fade:.035;--edge:.16;display:flex;gap:14px;align-items:center;background:linear-gradient(105deg,rgba(var(--lc),var(--wash)),rgba(var(--lc),var(--fade)) 70%);border:1px solid rgba(var(--lc),var(--edge));border-radius:18px;padding:13px 16px}
.layer:nth-child(2n){--lc:18,194,165;--lk:#0c917c}
.layer i{font-style:normal;font-weight:800;color:var(--lk);font-size:13px;width:36px;height:36px;min-width:36px;border-radius:12px;display:grid;place-items:center;background:rgba(var(--lc),.16)}
.layer b{display:block;font-size:15px}.layer span{color:var(--mute);font-size:13.5px}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .layer{--wash:.3;--fade:.1;--edge:.3}:root:not([data-theme="light"]) .layer:nth-child(2n){--lk:#6eefd4}}
:root[data-theme="dark"] .layer{--wash:.3;--fade:.1;--edge:.3}
:root[data-theme="dark"] .layer:nth-child(2n){--lk:#6eefd4}
/* 技术特点：图文卡片 */
.bp{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.bp>article{background:var(--card);border:1px solid var(--line);border-radius:22px;overflow:hidden;box-shadow:0 6px 20px rgba(47,107,255,.06)}
.bp img{display:block;width:calc(100% - 16px);height:auto;aspect-ratio:16/9;object-fit:cover;margin:8px 8px 0;border-radius:16px;background:#f6faff}
.bp>article>div{padding:16px 20px 22px}
.bp code{font:600 12px ui-monospace,Menlo,Consolas,monospace;color:var(--a);letter-spacing:1px}
.bp h3{margin:8px 0 6px;font-size:20px}.bp p{margin:0;color:var(--mute);font-size:14.5px}
/* Web3：便当格 */
.bento{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:150px;gap:14px}
.tile{border-radius:28px;padding:22px;display:flex;flex-direction:column;justify-content:flex-end}
.tile h3{margin:0 0 4px;font-size:18px}.tile p{margin:0;font-size:13.5px;color:var(--mute)}
.tile .e{display:block;width:46px;height:46px;object-fit:contain;margin-bottom:auto}
.t-a{grid-column:span 2;grid-row:span 2;background:var(--t1)}.t-a h3{font-size:26px}.t-a .e{width:76px;height:76px}
.t-b{grid-column:span 2;background:var(--t2)}.t-c{background:var(--t3)}.t-d{background:var(--t4)}
@media(max-width:720px){.vault,.bp{grid-template-columns:1fr}.bento{grid-template-columns:1fr 1fr}.t-a,.t-b{grid-column:span 2}}
footer{border-top:1px solid var(--line);padding:28px 0 36px;color:var(--mute);font-size:13px}
.foot{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
.foot b{color:var(--ink);font-size:16px;letter-spacing:1px}
.flinks{display:flex;flex-wrap:wrap;gap:8px 18px}
.flinks a{color:var(--mute);text-decoration:none}
.flinks a.go{color:var(--a);font-weight:600}
footer p{margin:14px 0 0;line-height:1.7}