:root{--bg:#f4f6fb;--panel:#ffffff;--ink:#0f172a;--muted:#64748b;--line:#e5e9f2;--brand:#14537f;--brand-2:#1f8fbe;--accent:#22c1d6;--accent-soft:#e0f6fa;--sun:#f0a500;--ok:#16a34a;--warn:#d97706;--danger:#dc2626;--navy:#0c1b28;--navy-2:#123048;--brand-soft:#e6f4fb;--indigo:#2f9ad0;--indigo-soft:#e3f2fd;--green-soft:#dcfce7;--orange:#f0a500;--orange-soft:#fef3e2;--teal:#149aab;--teal-soft:#d9f3f7;--red-soft:#fee2e2;--radius:12px;--radius-lg:16px;--shadow:0 1px 2px rgba(15,23,42,.06),0 10px 30px rgba(15,23,42,.06);--shadow-lg:0 2px 6px rgba(15,23,42,.08),0 24px 48px rgba(15,23,42,.12);--font:system-ui,-apple-system,"Microsoft YaHei","PingFang SC",sans-serif;--mono:ui-monospace,Consolas,"Courier New",monospace;--header-h:64px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 12px)}body{margin:0;color:var(--ink);background:var(--bg);font-family:var(--font);-webkit-font-smoothing:antialiased;line-height:1.6}a{color:inherit;text-decoration:none}code{font-family:var(--mono);font-size:.86em;background:#f1f5f9;border:1px solid var(--line);border-radius:6px;padding:1px 6px;color:#334155;word-break:break-all}.container{width:min(1120px,calc(100% - 48px));margin-inline:auto}.container-narrow{width:min(820px,calc(100% - 48px))}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:inherit;font-weight:600;cursor:pointer;border:0;border-radius:8px;padding:9px 16px;transition:filter .15s,transform .15s,background .15s,border-color .15s,box-shadow .15s;white-space:nowrap}.btn:hover{filter:brightness(1.08)}.btn:active{transform:translateY(1px)}.btn-primary{background:var(--brand);color:#fff}.btn-primary:hover{background:var(--brand-2)}.btn-ghost-light{background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.22)}.btn-ghost-light:hover{background:rgba(255,255,255,.16)}.btn-light{background:#fff;color:var(--brand)}.btn-light:hover{background:#e4f3fa}.btn-sm{padding:6px 12px;font-size:13px}.btn-lg{padding:12px 22px;font-size:15px;border-radius:10px}.btn-block{width:100%}.site-header{position:fixed;inset:0 0 auto 0;z-index:100;background:rgba(12,27,40,.82);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid rgba(255,255,255,.08);transition:background .25s,box-shadow .25s}.site-header.scrolled{background:rgba(12,27,40,.95);box-shadow:0 8px 30px rgba(2,6,23,.35)}.header-inner{gap:24px;height:var(--header-h)}.brand,.header-inner{display:flex;align-items:center}.brand{gap:10px;color:#fff;flex:none}.brand-logo{width:34px;height:34px;border-radius:10px;overflow:hidden;display:inline-flex;align-items:center;justify-content:center;box-shadow:0 4px 14px rgba(31,143,190,.45)}.brand-logo img{width:100%;height:100%;object-fit:cover;display:block}.brand-name{font-size:16px;letter-spacing:.2px}.brand-name b{font-weight:700}.site-nav{display:flex;gap:4px;margin-left:auto}.nav-link{color:#94a3b8;font-size:14px;padding:8px 12px;border-radius:8px;transition:color .15s,background .15s}.nav-link:hover{color:#e2e8f0;background:rgba(255,255,255,.06)}.nav-link.active{color:#fff;background:var(--brand-2)}.header-actions{display:flex;align-items:center;gap:10px}.nav-toggle{display:none;background:transparent;border:1px solid rgba(255,255,255,.18);border-radius:8px;color:#e2e8f0;padding:6px 8px;cursor:pointer}.hero{position:relative;background:radial-gradient(900px 480px at 8% -10%,rgba(20,83,127,.6),transparent 60%),radial-gradient(760px 420px at 100% 110%,rgba(34,193,214,.28),transparent 60%),linear-gradient(160deg,var(--navy) 0,#0f3448 55%,var(--navy-2) 100%);color:#fff;padding:calc(var(--header-h) + 84px) 0 96px;overflow:hidden}.hero-glow{position:absolute;inset:0;background-image:linear-gradient(rgba(148,163,184,.07) 1px,transparent 0),linear-gradient(90deg,rgba(148,163,184,.07) 1px,transparent 0);background-size:44px 44px;mask-image:radial-gradient(70% 60% at 50% 30%,#000 30%,transparent 100%);-webkit-mask-image:radial-gradient(70% 60% at 50% 30%,#000 30%,transparent 100%);pointer-events:none}.hero-inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;grid-gap:56px;gap:56px;align-items:center}.hero-badge{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:#bfe9f5;background:rgba(34,148,202,.18);border:1px solid rgba(103,205,224,.4);padding:6px 14px;border-radius:999px;margin-bottom:22px}.hero-title{font-size:clamp(34px,4.6vw,54px);line-height:1.15;letter-spacing:.5px;margin:0 0 18px;font-weight:800}.text-gradient{background:linear-gradient(90deg,#8fdcf0,var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}.hero-sub{font-size:16px;color:#b6c2d9;max-width:34em;margin:0 0 30px}.hero-sub b{color:#e2e8f0}.hero-cta{gap:14px;margin-bottom:30px}.hero-cta,.hero-platforms{display:flex;flex-wrap:wrap}.hero-platforms{gap:12px}.platform-chip{display:inline-flex;align-items:center;gap:7px;font-size:13px;color:#cbd5e1;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:999px;padding:6px 14px}.hero-visual{position:relative;padding:20px 8px 40px 0}.mock-screen{background:#0f172a;border:1px solid rgba(148,163,184,.25);border-radius:14px;box-shadow:var(--shadow-lg);overflow:hidden;transform:perspective(1200px) rotateY(-6deg) rotateX(2deg);transition:transform .4s ease}.mock-screen:hover{transform:perspective(1200px) rotateY(-2deg) rotateX(0deg)}.mock-screen-bar{display:flex;align-items:center;gap:6px;padding:9px 12px;background:rgba(255,255,255,.04);border-bottom:1px solid rgba(148,163,184,.15)}.mock-dot{width:9px;height:9px;border-radius:50%;background:rgba(148,163,184,.4)}.mock-screen-title{margin-left:8px;font-size:11px;color:#94a3b8}.mock-notify{background:#146c43;min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;padding:28px;text-align:center}.mock-notify-text{font-size:clamp(20px,2.6vw,30px);font-weight:800;letter-spacing:1px;line-height:1.4;text-shadow:0 2px 12px rgba(0,0,0,.35)}.mock-notify-sign{font-size:12px;color:rgba(255,255,255,.75)}.mock-phone{position:absolute;right:-6px;bottom:-18px;width:168px;background:#0f172a;border:1px solid rgba(148,163,184,.3);border-radius:26px;padding:10px;box-shadow:var(--shadow-lg)}.mock-phone-notch{width:46px;height:5px;border-radius:999px;background:rgba(148,163,184,.4);margin:2px auto 8px}.mock-phone-app{background:var(--bg);border-radius:18px;padding:12px;display:flex;flex-direction:column;gap:8px}.mock-app-head{font-size:13px;font-weight:700;color:var(--ink)}.mock-app-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:9px 10px}.mock-app-card-top{display:flex;align-items:center;justify-content:space-between}.mock-app-name{font-size:12px;font-weight:700;color:var(--ink)}.mock-app-online{font-size:10px;font-weight:600;color:var(--ok);background:var(--green-soft);border-radius:999px;padding:1px 8px}.mock-app-meta{margin-top:3px}.mock-app-input,.mock-app-meta{font-size:10px;color:var(--muted)}.mock-app-input{background:#fff;border:1px solid var(--line);border-radius:10px;padding:8px 10px;display:flex;align-items:center;justify-content:space-between}.mock-app-send{display:inline-flex;gap:4px;background:var(--indigo);font-size:10px;font-weight:600;border-radius:999px;padding:3px 9px}.mock-app-send,.mock-link{align-items:center;color:#fff}.mock-link{position:absolute;left:6px;bottom:44px;width:34px;height:34px;border-radius:50%;background:var(--brand-2);display:flex;justify-content:center;box-shadow:0 6px 18px rgba(31,143,190,.5);animation:floaty 3s ease-in-out infinite}@keyframes floaty{0%,to{transform:translateY(0)}50%{transform:translateY(-7px)}}.subpage{padding-top:calc(var(--header-h) + 16px)}.section{padding:88px 0}.section-alt{background:#eef1f8;border-block:1px solid var(--line)}.section-head{text-align:center;max-width:680px;margin:0 auto 48px}.section-tag{display:inline-block;font-size:13px;font-weight:700;color:var(--brand-2);background:var(--brand-soft);border-radius:999px;padding:4px 14px;margin-bottom:14px;letter-spacing:1px}.section-title{font-size:clamp(24px,3vw,32px);font-weight:800;margin:0 0 12px;letter-spacing:.3px}.section-desc{color:var(--muted);font-size:15px;margin:0}.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:20px;gap:20px}.feature-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:26px 24px;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#bfe0f0}.feature-icon{width:46px;height:46px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;margin-bottom:16px}.icon-blue{background:#e3f2fd;color:#1f8fbe}.icon-indigo{background:var(--indigo-soft);color:var(--indigo)}.icon-green{background:var(--green-soft);color:var(--ok)}.icon-orange{background:var(--orange-soft);color:var(--orange)}.icon-teal{background:var(--teal-soft);color:var(--teal)}.icon-red{background:var(--red-soft);color:var(--danger)}.feature-card h3{font-size:17px;margin:0 0 8px}.feature-card p{font-size:14px;color:var(--muted);margin:0}.guide-steps{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:20px;gap:20px;align-items:start}.guide-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:24px}.guide-card-head{display:flex;gap:14px;align-items:flex-start;margin-bottom:18px}.guide-num{flex:none;width:38px;height:38px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;font-size:17px;font-weight:800;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 14px rgba(31,143,190,.4)}.guide-card-head h3{font-size:17px;margin:0 0 2px}.guide-who{font-size:12px;color:var(--muted);margin:0}.guide-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:14px}.guide-list li{position:relative;padding-left:26px;font-size:13.5px;color:var(--muted);line-height:1.65}.guide-list li b{display:block;color:var(--ink);font-size:14px;margin-bottom:2px}.guide-list li:before{content:"";position:absolute;left:4px;top:8px;width:8px;height:8px;border-radius:50%;background:var(--brand-2);box-shadow:0 0 0 4px rgba(31,143,190,.16)}.guide-list-plain li:before{background:var(--ok);box-shadow:0 0 0 4px rgba(22,163,74,.14)}.guide-note{margin-top:24px;display:flex;gap:16px;align-items:flex-start;background:var(--brand-soft);border:1px solid #bfe0f0;border-radius:var(--radius-lg);padding:20px 22px}.guide-note-icon{flex:none;width:42px;height:42px;border-radius:12px;background:#fff;color:var(--brand-2);display:flex;align-items:center;justify-content:center;border:1px solid #bfe0f0}.guide-note b{display:block;margin-bottom:4px}.guide-note p{margin:0;font-size:13.5px;color:#3b4a6b}.download-grid{display:grid;grid-template-columns:repeat(2,1fr);grid-gap:24px;gap:24px}.download-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:28px;display:flex;flex-direction:column;gap:18px;transition:transform .2s ease,box-shadow .2s ease}.download-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}.download-card-top{display:flex;align-items:center;gap:14px}.download-icon{width:54px;height:54px;border-radius:14px;display:flex;align-items:center;justify-content:center;flex:none}.download-card-top h3{font-size:19px;margin:0}.download-platform{font-size:12.5px;color:var(--muted);margin:2px 0 0}.download-version{margin-left:auto;font-family:var(--mono);font-size:12px;font-weight:700;color:var(--brand);background:var(--brand-soft);border:1px solid #bfe0f0;border-radius:999px;padding:3px 12px}.download-meta{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}.download-meta li{display:flex;gap:12px;font-size:13.5px;color:var(--muted);padding-bottom:8px;border-bottom:1px dashed var(--line)}.download-meta li:last-child{border-bottom:0;padding-bottom:0}.download-meta li span{flex:none;width:72px;color:var(--ink);font-weight:600}.download-tip{text-align:center;font-size:13px;color:var(--muted);margin:22px 0 0}.faq-list{display:flex;flex-direction:column;gap:12px}.faq-item{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}.faq-item summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:12px;cursor:pointer;padding:16px 20px;font-size:15px;font-weight:600;transition:background .15s}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:hover{background:#f8fafc}.faq-arrow{flex:none;width:8px;height:8px;border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);transform:rotate(45deg);transition:transform .2s}.faq-item[open] .faq-arrow{transform:rotate(225deg)}.faq-item[open] summary{color:var(--brand)}.faq-body{padding:14px 20px 18px;font-size:14px;color:var(--muted);border-top:1px solid var(--line);line-height:1.7}.faq-body b{color:var(--ink)}.cta-band{background:linear-gradient(135deg,var(--brand) 0,var(--brand-2) 100%);color:#fff;padding:56px 0}.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}.cta-inner h2{font-size:clamp(22px,2.6vw,28px);margin:0 0 6px}.cta-inner p{margin:0;color:#d6edf6;font-size:15px}.site-footer{background:var(--navy);color:#94a3b8;padding:48px 0 0}.footer-inner{display:flex;align-items:flex-start;justify-content:space-between;gap:32px;flex-wrap:wrap;padding-bottom:28px}.footer-brand{display:flex;gap:14px;align-items:center}.footer-brand b{color:#fff;font-size:16px;display:block}.footer-brand p{margin:4px 0 0;font-size:13px}.footer-links{display:flex;gap:20px;flex-wrap:wrap;font-size:14px}.footer-links a{transition:color .15s}.footer-links a:hover{color:#fff}.footer-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;border-top:1px solid rgba(255,255,255,.08);padding:18px 0 22px;font-size:12.5px;color:#64748b}.reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease}.reveal.visible{opacity:1;transform:none}@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}.mock-link{animation:none}html{scroll-behavior:auto}}@media (max-width:980px){.hero{padding:calc(var(--header-h) + 56px) 0 72px}.hero-inner{grid-template-columns:1fr;gap:64px}.hero-visual{max-width:520px;margin-inline:auto}.feature-grid{grid-template-columns:repeat(2,1fr)}.download-grid,.guide-steps{grid-template-columns:1fr}}@media (max-width:720px){.container,.container-narrow{width:calc(100% - 36px)}.site-nav{position:absolute;top:var(--header-h);left:0;right:0;display:none;flex-direction:column;gap:2px;background:rgba(12,27,40,.98);border-bottom:1px solid rgba(255,255,255,.1);padding:12px 24px 16px}.site-nav.open{display:flex}.nav-link{padding:11px 12px;font-size:15px}.nav-toggle{display:inline-flex}.header-actions{margin-left:auto}.header-actions .btn{display:none}.section{padding:64px 0}.feature-grid{grid-template-columns:1fr}.hero-cta .btn{flex:1 1 auto}.mock-phone{width:140px;right:-4px}.mock-notify{min-height:170px}.download-card,.guide-card{padding:20px}.footer-inner{flex-direction:column;gap:20px}.footer-bottom{flex-direction:column;gap:6px}}