:root{--primary:rgb(70,139,223);--primary-50:#f2f7fe;--primary-100:#e8f1fd;--primary-200:#cfe2fa;--primary-500:#468bdf;--primary-600:#3176c8;--primary-700:#205fa9;--gradient:linear-gradient(130deg,#f7faff,#e8f2fd);--text:#213347;--muted:#65778c;--border:#e1e9f2;--bg:#fff;--soft:#f7f9fc;--green:#287a5a;--amber:#996320;--shadow-sm:0 3px 16px rgba(33,68,106,.06);--shadow-md:0 14px 42px rgba(33,68,106,.1);--shadow-lg:0 24px 70px rgba(33,68,106,.12);--radius-sm:10px;--radius-md:16px;--radius-lg:22px;--radius-xl:28px;--radius-pill:999px;--content:1200px;--transition-fast:180ms ease;--transition-base:220ms ease;--font:Inter,-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:400 16px/1.8 var(--font);overflow-x:hidden}body.menu-open{overflow:hidden}img{max-width:100%;height:auto}a{color:inherit;text-decoration:none}button{font:inherit}h1,h2,h3,p{margin-top:0}h1,h2,h3{letter-spacing:-.025em;line-height:1.25;font-weight:550}h1{font-size:clamp(36px,4.5vw,62px)}h2{font-size:clamp(29px,3vw,42px)}h3{font-size:clamp(20px,2vw,26px)}p{color:var(--muted)}:focus-visible{outline:3px solid var(--primary);outline-offset:4px}.container{width:min(var(--content),calc(100% - 48px));margin-inline:auto}.section{padding-block:clamp(56px,7.3vw,108px)}.eyebrow{font-size:12px;font-weight:600;color:var(--primary-700);letter-spacing:.14em;text-transform:uppercase;margin-bottom:18px}.lead{font-size:clamp(16px,1.45vw,19px);line-height:1.85;max-width:650px}.section-heading{max-width:820px;margin-bottom:38px}.short-heading{max-width:100%}.muted-section{background:var(--soft)}.text-link{color:var(--primary-700);font-weight:550;display:inline-flex;align-items:center;gap:8px;transition:transform var(--transition-fast)}.text-link:hover{transform:translateX(3px)}.skip-link{position:absolute;left:10px;top:-70px;background:white;z-index:300;padding:8px}.skip-link:focus{top:10px}
.navbar{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.9);border-bottom:1px solid rgba(225,233,242,.72);backdrop-filter:blur(16px);transition:box-shadow var(--transition-base)}.navbar.scrolled{box-shadow:var(--shadow-sm)}.nav-inner{height:78px;display:flex;align-items:center;gap:25px}.brand{display:inline-flex;align-items:center;gap:10px;font-size:21px;font-weight:650;letter-spacing:-.03em;flex-shrink:0}.brand img{object-fit:contain}.desktop-nav{display:flex;align-items:center;gap:clamp(12px,1.6vw,25px);margin-left:auto}.desktop-nav a{font-size:13px;font-weight:500;color:#56697d;white-space:nowrap}.desktop-nav a:hover,.desktop-nav a.active{color:var(--primary-700)}.lang-switch{display:flex;align-items:center;gap:9px;font-size:13px;white-space:nowrap}.lang-switch a{color:var(--muted)}.lang-switch .active{font-weight:650;color:var(--primary-700)}.menu-toggle{display:none;width:44px;height:44px;align-items:center;justify-content:center;flex-direction:column;gap:5px;border:1px solid var(--border);border-radius:10px;background:white;margin-left:auto}.menu-toggle span{width:20px;height:2px;background:var(--text)}.drawer-backdrop{position:fixed;inset:0;background:rgba(22,41,62,.4);z-index:170}.drawer-backdrop[hidden]{display:none}.mobile-drawer{position:fixed;z-index:180;right:0;top:0;width:min(84vw,360px);height:100dvh;background:#fff;display:flex;flex-direction:column;box-shadow:var(--shadow-lg);transform:translateX(110%);visibility:hidden;transition:transform .23s ease,visibility .23s}.mobile-drawer.open{transform:translateX(0);visibility:visible}.drawer-head{padding:20px 24px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}.drawer-close{border:0;background:var(--soft);width:44px;height:44px;border-radius:10px;font-size:28px}.mobile-drawer nav{padding:12px 24px;overflow:auto}.mobile-drawer nav a{display:flex;justify-content:space-between;padding:12px 0;border-bottom:1px solid var(--border);font-weight:500}.drawer-lang{padding:20px 24px;margin-top:auto;border-top:1px solid var(--border);font-size:16px}
.download-jump{position:fixed;right:14px;top:42%;width:78px;height:78px;z-index:110;border-radius:10px;background:var(--primary);color:white;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:0;box-shadow:0 10px 24px rgba(70,139,223,.26);font-size:14px;font-weight:600;line-height:1.5;transition:transform var(--transition-fast)}.download-jump:hover{transform:translateX(-4px)}.jump-arrow{font-size:27px}.menu-open .download-jump{z-index:90}.download-cta{background:var(--primary-50)}.cta-inner{border:1px solid var(--primary-200);background:linear-gradient(125deg,#fff,#eef6ff);border-radius:var(--radius-xl);text-align:center;padding:clamp(40px,6vw,76px) 20px}.cta-inner p:not(.eyebrow){max-width:660px;margin:12px auto 30px}.download-btn{display:inline-flex;justify-content:center;align-items:center;min-width:240px;min-height:76px;padding:14px 24px;background:var(--primary);color:white;font-size:20px;font-weight:600;border-radius:12px;box-shadow:var(--shadow-md)}.download-btn:hover{background:var(--primary-600)}.site-footer{padding:60px 0 25px;background:white}.footer-grid{display:grid;grid-template-columns:5fr 7fr;gap:80px}.footer-grid p{max-width:350px;font-size:14px;margin-top:18px}.footer-grid nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px 22px;font-size:14px}.footer-grid nav a:hover{color:var(--primary-700)}.footer-bottom{display:flex;justify-content:space-between;gap:20px;font-size:12px;color:var(--muted);border-top:1px solid var(--border);padding-top:20px;margin-top:45px}
.hero{padding-top:clamp(40px,5.5vw,80px)}.hero-grid{display:grid;grid-template-columns:5fr 7fr;gap:34px;align-items:center;min-height:600px}.hero-copy{max-width:535px}.hero-copy h1{line-height:1.17}.hero-tags{display:flex;gap:10px;flex-wrap:wrap;margin:28px 0}.hero-tags span{font-size:13px;background:var(--primary-50);border:1px solid var(--primary-100);border-radius:var(--radius-pill);padding:5px 12px;white-space:nowrap}.hero-stage{position:relative;min-height:575px;display:flex;align-items:center;justify-content:center}.hero-glow{position:absolute;width:75%;height:78%;border-radius:50%;background:#e3f0ff;filter:blur(55px);opacity:.8}.app-frame{position:absolute;left:1%;top:6%;width:54%;height:88%;display:flex;align-items:center}.app-frame img{width:100%;max-height:520px;object-fit:contain;filter:drop-shadow(0 20px 25px rgba(32,81,126,.09))}.hero-wallet{position:absolute;width:57%;right:2%;top:15%}.wallet-ui{background:white;border:1px solid var(--border);border-radius:var(--radius-lg);padding:26px;box-shadow:var(--shadow-md);max-width:475px;margin:auto;min-width:0}.ui-bar,.ui-footer{display:flex;justify-content:space-between;gap:8px;align-items:center;font-size:13px}.ui-bar small{display:block;color:var(--muted);font-size:10px;font-weight:400}.status-dot{color:var(--green);font-size:10px}.ui-label{font-size:12px;margin:23px 0 3px}.balance{font-size:clamp(24px,2.6vw,36px);letter-spacing:-.03em;font-weight:600;line-height:1.35}.balance small{font-size:12px;color:var(--muted)}.ui-note{font-size:10px;color:var(--muted);margin-bottom:19px}.token-row{display:flex;align-items:center;gap:11px;border-top:1px solid var(--border);padding:12px 0;font-size:13px}.token-icon{width:34px;height:34px;border-radius:10px;background:var(--primary-50);display:grid;place-items:center;font-size:18px;color:var(--primary-700);flex-shrink:0}.token-row b{font-weight:600}.token-row small{display:block;color:var(--muted);font-size:10px}.token-row strong{margin-left:auto;font-size:12px;font-weight:550}.ui-footer{border-top:1px solid var(--border);padding-top:12px;color:var(--green);font-size:11px;flex-wrap:wrap}.float-status{position:absolute;display:inline-block;background:white;border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:10px;padding:10px 14px;font-size:12px;white-space:nowrap}.float-a{top:7%;right:0}.float-b{bottom:6%;left:21%}.principles{border-block:1px solid var(--border)}.strip-grid{display:grid;grid-template-columns:repeat(4,1fr)}.strip-grid>div{padding:21px 16px;border-right:1px solid var(--border);display:flex;gap:12px;align-items:baseline}.strip-grid>div:first-child{padding-left:0}.strip-grid>div:last-child{border-right:0}.strip-grid span,.chapter-num{color:var(--primary);font-size:12px}.strip-grid strong{font-size:13px;font-weight:550;line-height:1.6}
.layout-showcase{display:grid;grid-template-columns:7fr 5fr;gap:clamp(25px,4vw,75px);align-items:center}.showcase-visual{min-width:0;border:1px solid var(--border);border-radius:var(--radius-xl);background:var(--primary-50);padding:clamp(18px,3vw,40px);display:flex;align-items:center;gap:20px}.showcase-visual .wallet-ui{width:65%;flex-shrink:0}.illustration-inline{width:35%}.content-image{object-fit:contain;display:block;width:100%;border-radius:var(--radius-lg)}.showcase-copy p{max-width:470px}.steps-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.step-card{background:white;border:1px solid var(--border);border-radius:var(--radius-md);padding:25px;min-width:0}.step-number{font-size:27px;font-weight:500;letter-spacing:-.04em;color:var(--primary)}.step-card h3{font-size:19px;margin:14px 0 12px}.step-card p{font-size:14px}.step-card a{color:var(--primary-700);font-size:13px;font-weight:550}.feature-split{display:grid;grid-template-columns:5fr 7fr;gap:6%;align-items:center;padding:42px 0;border-top:1px solid var(--border)}.feature-split.reversed{grid-template-columns:7fr 5fr}.feature-split.reversed .feature-image{order:-1}.feature-text{max-width:520px}.feature-text h3{font-size:clamp(26px,3vw,38px)}.feature-image{min-height:300px;background:var(--primary-50);border-radius:var(--radius-lg);padding:clamp(20px,4vw,40px);display:flex;align-items:center;justify-content:center}.feature-image img{max-height:340px}.security-story{background:#f9fbfe}.architecture-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}.architecture-item{border-top:2px solid var(--primary-200);padding-top:15px}.architecture-item>span{font-size:40px;color:var(--primary);font-weight:500}.architecture-item h3{margin:10px 0}.directory-grid{display:grid;grid-template-columns:4fr 8fr;gap:65px}.chapter-list a{display:grid;grid-template-columns:55px 1fr 22px;gap:10px;align-items:center;padding:13px 0;border-bottom:1px solid 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8fr;gap:60px}.related-links{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.related-links a{border:1px solid var(--border);padding:15px;border-radius:var(--radius-sm);display:flex;justify-content:space-between;align-items:center;gap:12px;font-size:14px}.related-links a:hover{border-color:var(--primary)}.layout-security .detail-row{border-left:2px solid var(--primary-200);padding-left:18px}.layout-feature .detail-row:nth-of-type(even){background:var(--primary-50);border-radius:12px;padding-right:20px}.layout-recovery .detail-number{background:var(--primary-50);border-radius:10px;text-align:center;font-size:24px;align-self:start}.observe-ready{transition:opacity .55s ease,transform .55s ease}.observe-ready.appeared{opacity:1;transform:none}
@media(max-width:1100px){.desktop-nav{gap:11px}.desktop-nav a{font-size:12px}.nav-inner{gap:14px}.hero-grid{grid-template-columns:5fr 6fr}.hero-stage{min-height:480px}.wallet-ui{padding:18px}.hero-wallet{width:62%}}
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@media(max-width:480px){.container{width:calc(100% - 36px)}.hero-stage{grid-template-columns:1fr;max-width:400px;margin:auto}.app-frame{justify-content:center}.app-frame img{max-height:300px}.hero-wallet{max-width:340px;margin:auto}.float-a,.float-b{display:none}.hero-tags{padding-right:52px}.hero-copy .text-link{margin-bottom:15px}.steps-grid,.related-links{grid-template-columns:1fr}.strip-grid{grid-template-columns:1fr}.strip-grid>div{border-right:0}.scenario-primary{grid-template-columns:1fr}.scenario-primary img{max-height:220px}.wallet-ui{padding:18px}.footer-grid nav{grid-template-columns:repeat(2,1fr)}.footer-bottom{flex-direction:column}.risk-row{grid-template-columns:1fr}.risk-row strong{grid-column:auto}.download-jump{top:auto;bottom:100px;right:12px}.guide-intro h1{padding-right:45px}.guide-art{padding:18px}.detail-row{grid-template-columns:44px 1fr;gap:9px}.detail-number{font-size:22px}.detail-row h3{font-size:20px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}