:root{color-scheme:light;--ink:#1d1d1f;--muted:#626a79;--blue:#007aff;--blue-deep:#0069dd;--surface:#f5f7fa;--line:#e5e9f0;--radius:18px;--safe-bottom:env(safe-area-inset-bottom,0px);--font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#fff;color:var(--ink);font-family:var(--font);-webkit-font-smoothing:antialiased;line-height:1.5}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent;touch-action:manipulation}button{cursor:pointer}a{color:var(--blue);text-decoration:none}button img,img{max-width:100%;vertical-align:middle}button{border:0}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #1b74d8;outline-offset:4px}button:disabled{cursor:wait;opacity:.65}h1,h2,p{margin:0}[hidden]{display:none!important}.container{width:min(1280px,calc(100% - 144px));margin-inline:auto}.topbar{height:80px;display:flex;justify-content:space-between;align-items:center;position:relative;z-index:2}.brand{display:flex;gap:9px;align-items:center}.brand>img{flex:none;object-fit:contain}.brand strong{display:block;font-size:20px;line-height:1.25;letter-spacing:.01em}.brand small{display:block;color:var(--muted);font-size:12px;line-height:1.5;margin-top:3px}.text-button{background:none;color:var(--blue);min-height:44px;padding:10px 0;font-size:15px;display:inline-flex;align-items:center;justify-content:center;gap:8px}.header-versions{color:var(--muted)}.hero{overflow:hidden}.hero-inner{position:relative;display:grid;grid-template-columns:44% 56%;grid-template-rows:auto 1fr;min-height:420px;padding-block:42px 40px}.hero-copy{grid-column:1;grid-row:1;z-index:1;position:relative}.hero h1{font-size:46px;font-weight:750;line-height:1.25;letter-spacing:-1.7px;white-space:nowrap}.hero h1 span{white-space:nowrap}.hero-subtitle{font-size:20px;color:var(--muted);line-height:1.6;margin-top:16px;max-width:540px}.hero-visual{position:absolute;width:min(67%,852px);right:-72px;bottom:0;z-index:0;display:block;pointer-events:none}.hero-visual img{width:100%;height:auto;display:block;object-fit:contain}.hero-download{grid-column:1;grid-row:2;padding-top:26px;z-index:1;display:flex;align-items:flex-start;flex-direction:column}.primary-button{display:inline-flex;align-items:center;justify-content:center;gap:12px;background:var(--blue);color:#fff;font-weight:600;font-size:18px;min-height:56px;padding:14px 30px;border-radius:14px;box-shadow:none;transition:background .15s}.primary-button:hover{background:var(--blue-deep)}.primary-button:active{background:#005abf}.primary-button .button-icon{filter:brightness(0) invert(1);width:25px;height:25px}.download-meta{font-size:14px;color:var(--muted);margin:10px 0 2px;padding-left:4px}.handoff-help{font-size:13px;line-height:1.4}.content{padding-top:24px}.desktop-scenes{display:grid;grid-template-columns:1fr 1fr;gap:16px}.desktop-scene{background:var(--surface);border-radius:16px;padding:24px 28px 20px;overflow:hidden}.desktop-scene h2{font-size:25px;line-height:1.35;letter-spacing:-.5px;font-weight:700}.desktop-scene p{font-size:17px;line-height:1.5;margin-top:3px;color:var(--muted)}.desktop-scene picture{display:block;margin-top:10px}.desktop-scene img{width:100%;aspect-ratio:2.56;object-fit:cover;object-position:center;border-radius:9px;display:block}.steps{padding:26px 22px 18px}.steps h2{font-size:22px;font-weight:650;line-height:1.4;text-align:center}.steps ol{display:flex;align-items:center;justify-content:space-around;list-style:none;padding:0;margin:18px 0 0;gap:26px}.steps li{display:flex;gap:18px;align-items:center;position:relative;font-size:16px;line-height:1.5}.steps li+li:before{content:'›';position:absolute;left:-64px;color:#a4b4c9;font-size:28px}.step-icon{width:62px;height:62px;border-radius:50%;background:#edf5ff;display:grid;place-items:center;flex:none}.step-icon img{filter:invert(35%) sepia(99%) saturate(3700%) hue-rotate(199deg) brightness(106%) contrast(101%)}.steps b{font-size:18px;font-weight:600;color:var(--blue);margin-right:12px}.network-note{text-align:center;color:var(--muted);font-size:13px;margin-top:14px}.help-row{display:flex;align-items:center;justify-content:space-between;min-height:58px;padding:14px 26px;border-radius:14px;background:var(--surface);font-size:16px;color:var(--ink);gap:12px}.help-row>span:first-child{display:flex;align-items:center;gap:12px}.help-row>span:last-child{color:var(--blue);font-size:14px;white-space:nowrap}.help-row b{font-size:21px;font-weight:400;margin-left:4px}.help-row img{opacity:.75}.legal{display:flex;justify-content:space-between;font-size:12px;line-height:1.5;color:var(--muted);padding-block:26px 110px;gap:12px}.legal a{color:var(--muted);margin-left:16px;display:inline-flex;min-height:28px;align-items:center}.sticky-download{position:fixed;bottom:0;left:0;width:100%;z-index:30;background:rgba(255,255,255,.98);border-top:1px solid var(--line);padding-bottom:var(--safe-bottom);box-shadow:0 -2px 12px #12244d08}.sticky-inner{height:80px;display:flex;justify-content:space-between;align-items:center;gap:20px}.sticky-inner .primary-button{min-height:48px;font-size:16px;border-radius:12px;padding:10px 28px}.sticky-inner .brand strong{font-size:18px}.sticky-inner .brand small{font-size:13px}.mobile-scenes{display:grid;gap:12px}.mobile-scene{position:relative;min-height:146px;border:1px solid var(--line);border-radius:16px;overflow:hidden;background:#fff}.mobile-scene picture{display:block;position:absolute;right:0;top:0;width:52%;height:100%}.mobile-scene img{width:100%;height:100%;object-fit:cover;object-position:center}.mobile-scene:after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,#fff 0%,#fff 46%,#ffffffc9 54%,transparent 70%);pointer-events:none}.scene-copy{position:relative;z-index:1;max-width:65%;padding:23px 16px}.scene-copy h2{font-size:21px;font-weight:700;line-height:1.4;letter-spacing:-.5px}.scene-copy p{font-size:14px;color:var(--muted);line-height:1.5;margin-top:7px}.phone-break{display:none}.modal{border:0;background:#fff;padding:28px;border-radius:22px;width:min(440px,calc(100% - 40px));max-height:calc(100dvh - 40px);color:var(--ink);box-shadow:0 16px 80px #0003;overflow:auto}.modal::backdrop{background:#11182778}.modal-head{display:flex;justify-content:space-between;gap:14px;align-items:center}.modal h2{font-size:23px;line-height:1.35}.icon-button{display:grid;place-items:center;flex:none;width:44px;height:44px;border-radius:50%;background:#f2f4f7}.icon-button img{width:20px;height:20px}.modal-intro{font-size:14px;color:var(--muted);line-height:1.6;margin-top:10px}.version-list{display:grid;gap:8px;margin:20px 0 12px}.version-option{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:15px 16px;background:var(--surface);border:1px solid transparent;border-radius:12px;min-height:60px;text-align:left;color:var(--ink)}.version-option strong{font-size:17px;display:block}.version-option small{display:block;font-size:12px;color:var(--muted)}.version-option[aria-pressed=true]{border-color:var(--blue);background:#eef5ff}.version-option img{width:22px;height:22px}.versions-modal>.text-button{display:flex}.guide-body{font-size:16px;line-height:1.8;padding:20px 0}.guide-body p+p{margin-top:12px}.guide-body ol{padding-left:24px;margin:0}.guide-body li+li{margin-top:8px}.guide-body small{display:block;color:var(--muted);font-size:13px;line-height:1.6;margin-top:15px}.secondary-button{display:flex;align-items:center;justify-content:center;min-height:50px;width:100%;border-radius:12px;background:#edf5ff;color:#0069dd;font-weight:600}.guide-modal>.text-button{width:100%;font-size:14px;margin-top:4px}.guide-arrow{display:none}.guide-modal.point-top{position:fixed;top:env(safe-area-inset-top,0px);margin-top:96px;margin-bottom:0;overflow:visible}.point-top .guide-arrow{display:block;position:absolute;right:8px;top:-83px;width:54px;height:74px;pointer-events:none}.guide-arrow img{width:100%;height:100%;filter:brightness(0) invert(1)}.copy-fallback{font-size:13px;color:var(--muted);display:block;margin-top:12px}.copy-fallback input{width:100%;min-height:44px;border:1px solid var(--line);border-radius:8px;margin-top:6px;padding:10px;font-size:13px}.qr-modal{text-align:center}.qr-image{display:block;margin:20px auto;width:240px;height:240px;image-rendering:pixelated}.qr-modal p{font-size:16px}.qr-modal small{display:block;font-size:13px;color:var(--muted);margin-top:10px}.toast{position:fixed;bottom:calc(108px + var(--safe-bottom));left:50%;transform:translateX(-50%);background:#1d1d1f;color:#fff;padding:12px 18px;border-radius:12px;font-size:14px;z-index:90;max-width:calc(100% - 40px);box-shadow:0 4px 24px #0002}.skip-link{position:absolute;left:20px;top:-80px;z-index:100;background:white;padding:12px}.skip-link:focus{top:12px}.noscript{position:fixed;bottom:0;left:0;right:0;background:#fff4d9;padding:18px;z-index:100}.qa-badge{position:fixed;top:0;right:0;padding:3px 8px;background:#fff4d9;font-size:10px;z-index:150;pointer-events:none;color:#785600}
/* 宽度只控制布局，不能决定安装包。平板/窄电脑继续保留其已识别平台内容。 */
@media(min-width:768px) and (max-width:1199px){.container{width:calc(100% - 64px)}.hero-inner{padding-block:32px;min-height:370px}.hero h1{font-size:36px;white-space:normal;max-width:440px}.hero-subtitle{font-size:18px;max-width:400px}.hero-visual{width:62%;right:-32px;bottom:14px}.hero-download{padding-top:24px}.desktop-scene{padding:22px 22px 18px}.desktop-scene h2{font-size:22px}.steps li{gap:10px;font-size:14px}.steps li+li:before{left:-24px}.step-icon{width:52px;height:52px}.steps b{margin-right:7px}}
html[data-family=mobile] .hero-inner{display:flex;flex-direction:column;align-items:center;padding-block:16px 20px;max-width:700px}.hero-inner>*{min-width:0}html[data-family=mobile] .hero-copy{text-align:center}html[data-family=mobile] .hero h1{font-size:40px;line-height:1.3;letter-spacing:-1.1px;white-space:normal}html[data-family=mobile] .hero-subtitle{margin-top:10px;font-size:18px}html[data-family=mobile] .hero-visual{position:relative;inset:auto;width:100%;margin-top:18px}html[data-family=mobile] .hero-visual img{border-radius:16px;width:100%;aspect-ratio:852/380;object-fit:contain}html[data-family=mobile] .hero-download{align-items:center;padding-top:20px;width:100%}html[data-family=mobile] .hero-download .primary-button{width:78%;max-width:400px;border-radius:999px}html[data-family=mobile] .content{max-width:700px;padding-top:0}html[data-family=mobile] .steps{margin-top:14px;border:1px solid var(--line);border-radius:16px}html[data-family=mobile] .steps h2{text-align:left}html[data-family=mobile] .steps li{flex-direction:column;text-align:center;gap:10px}html[data-family=mobile] .steps li+li:before{left:-18px;top:15px}html[data-family=mobile] .help-row{background:#fff;border:1px solid var(--line);margin-top:12px}html[data-family=mobile] .header-versions{display:none}html[data-family=mobile] .topbar,html[data-family=mobile] .legal{max-width:700px}
@media(max-width:767px){.container{width:calc(100% - 32px)}.topbar{height:70px;padding-block:10px}.brand>img{width:40px;height:40px}.brand strong{font-size:18px}.brand small{font-size:11px}.brand{gap:7px}.header-versions{font-size:13px}.hero-inner{display:flex;flex-direction:column;align-items:center;padding-block:12px 20px;min-height:0}.hero-copy{text-align:center;width:100%}.hero h1,html[data-family=mobile] .hero h1{font-size:30px;line-height:1.3;letter-spacing:-.9px;white-space:normal;font-weight:750}.hero-subtitle,html[data-family=mobile] .hero-subtitle{font-size:16px;line-height:1.55;margin:10px auto 0;max-width:355px}.hero-visual,html[data-family=mobile] .hero-visual{position:relative;inset:auto;margin-top:18px;width:calc(100% + 32px)}.hero-visual img,html[data-family=mobile] .hero-visual img{aspect-ratio:852/380;object-fit:contain;border-radius:0 0 14px 14px}.hero-download,html[data-family=mobile] .hero-download{align-items:center;width:100%;padding-top:18px}.primary-button{font-size:17px;min-height:52px;padding:12px 22px;border-radius:999px}.hero-download .primary-button,html[data-family=mobile] .hero-download .primary-button{width:88%;max-width:none;min-height:52px}.primary-button .button-icon{width:23px;height:23px}.download-meta{font-size:13px;padding-left:0;margin-top:8px}.other-versions{font-size:14px}.handoff-help{padding:0;min-height:36px;font-size:13px}.content{padding-top:0}.mobile-scene{min-height:138px}.scene-copy{padding:18px 13px;max-width:66%}.scene-copy h2{font-size:20px;line-height:1.4}.scene-copy p{font-size:13px;margin-top:6px}.phone-break{display:inline}.mobile-scene:after{background:linear-gradient(90deg,#fff 0%,#fff 39%,#ffffffb8 51%,transparent 65%)}.mobile-scene picture{width:57%}.desktop-scenes{grid-template-columns:1fr;gap:12px}.desktop-scene{padding:20px 18px 18px}.desktop-scene h2{font-size:22px}.desktop-scene p{font-size:15px}.steps,html[data-family=mobile] .steps{margin-top:14px;padding:17px 14px 14px;border:1px solid var(--line);border-radius:16px}.steps h2,html[data-family=mobile] .steps h2{font-size:20px;text-align:left}.steps ol{gap:14px;justify-content:space-between;margin-top:18px}.steps li,html[data-family=mobile] .steps li{flex:1;flex-direction:column;text-align:center;font-size:12px;gap:10px;line-height:1.55}.steps li>span:last-child{white-space:nowrap}.steps li+li:before,html[data-family=mobile] .steps li+li:before{left:-11px;top:12px;font-size:24px}.steps b{font-size:14px;margin-right:4px}.step-icon{width:50px;height:50px}.step-icon img{width:25px;height:25px}.network-note{font-size:12px;margin-top:12px}.help-row{min-height:58px;padding:10px 14px;font-size:14px;margin-top:12px;background:white;border:1px solid var(--line)}.help-row>span:first-child{gap:7px}.help-row>span:last-child{font-size:13px}.help-row img{width:21px;height:21px}.legal{flex-direction:column;align-items:center;gap:0;font-size:11px;padding-block:18px calc(100px + var(--safe-bottom))}.legal a{margin-inline:8px;min-height:36px}.sticky-inner{height:72px;gap:10px}.sticky-inner .brand>img{width:40px;height:40px}.sticky-inner .brand strong{font-size:16px}.sticky-inner .brand small{font-size:11px}.sticky-inner .primary-button{max-width:52%;font-size:14px;line-height:1.25;min-height:46px;padding:11px 16px;border-radius:14px}.modal{padding:20px;width:calc(100% - 32px);max-height:calc(100dvh - 48px);border-radius:18px}.modal h2{font-size:21px}.guide-modal.point-top{margin-top:92px}.qr-entry{display:none!important}}
@media(max-width:359px){.hero h1,html[data-family=mobile] .hero h1{font-size:27px}.hero-subtitle,html[data-family=mobile] .hero-subtitle{font-size:15px}.scene-copy h2{font-size:18px}.steps{padding-inline:10px}.steps li,html[data-family=mobile] .steps li{font-size:11px}.steps ol{gap:8px}.steps b{margin-right:2px}.sticky-inner .brand small{display:none}.help-row{font-size:13px;padding-inline:10px}.help-row>span:first-child{gap:4px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}
/* 老 WebView 的 dialog 渐进降级，不依赖第三方弹窗框架。 */
.fallback-backdrop{position:fixed;inset:0;background:#11182778;z-index:60}.modal.fallback-dialog{display:block;position:fixed;left:50%;top:50%;transform:translate(-50%,-50%);margin:0;z-index:61}.modal.fallback-dialog.point-top{top:100px;transform:translateX(-50%)}