:root{--accent:#0f766e;--accent-dark:#0b5e58;--soft:#e4f2ed;--bg:#f5f8f6;--surface:#fff;--text:#173534;--muted:#657a78;--line:#dce7e2;--blue:#2c658e;--blue-soft:#eaf3fb;--radius:18px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.8 "PingFang SC","Microsoft YaHei",Arial,sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}p{margin:0;color:var(--muted)}h1,h2,h3{margin:0;line-height:1.4;letter-spacing:-.025em;overflow-wrap:anywhere}h2{font-size:27px}h3{font-size:18px}button,a,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,summary:focus-visible{outline:3px solid #2c658e;outline-offset:5px}svg{display:block;width:28px;height:28px}.sidebar{position:fixed;inset:0 auto 0 0;width:228px;background:#edf5f0;border-right:1px solid var(--line);padding:34px 22px;display:flex;flex-direction:column;z-index:10}.brand{display:flex;gap:11px;align-items:flex-start;font-size:15px;font-weight:750;line-height:1.6}.brand-icon{width:40px;height:40px;flex-shrink:0;display:grid;place-items:center;border-radius:13px;background:var(--accent);color:#fff;font-size:25px;box-shadow:0 7px 15px #0f766e18}.brand small{display:block;color:var(--muted);font-size:10px;font-weight:400;margin-top:6px;line-height:1.8}.sidebar nav{display:grid;gap:11px;margin-top:52px}.sidebar nav a{display:flex;align-items:center;gap:10px;padding:12px 10px;border-radius:11px;font-size:13px;color:#486660}.sidebar nav a:hover{background:#fff;color:var(--accent)}.nav-dot{font-size:10px;color:#809a91}.nav-arrow{margin-left:auto;color:var(--accent);font-size:15px}.sidebar-download{margin-top:30px;border:1px solid #b9d7cb;border-radius:12px;padding:13px 12px;display:flex;align-items:center;gap:10px;color:var(--accent);font-size:13px;font-weight:700}.sidebar-download>span{display:grid;place-items:center;background:#d6eae1;width:23px;height:23px;border-radius:7px}.sidebar-bottom{margin-top:auto;padding-top:28px;border-top:1px solid #d6e7dd;font-size:11px;color:var(--muted);display:flex;align-items:center;gap:8px}.status-dot{width:6px;height:6px;border-radius:50%;background:#4caa7e}.workspace{margin-left:228px;min-width:0;padding:0 44px}.topbar{min-height:83px;display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line);font-size:12px;color:var(--muted)}.topbar>a{color:var(--accent);font-weight:700;white-space:nowrap}.topbar>a>span{margin-left:12px}.workspace>main,.workspace>footer,.topbar{max-width:1100px;margin-inline:auto}.hero{padding:52px 0 34px;position:relative}.eyebrow{font-size:11px;letter-spacing:.7px;font-weight:700;color:var(--accent);display:inline-flex;align-items:center;gap:8px;margin-bottom:13px}.eyebrow>i{width:7px;height:7px;border-radius:50%;background:var(--accent)}.hero h1{font-size:clamp(32px,3.4vw,48px);max-width:920px;line-height:1.35;margin-bottom:20px}.hero-description{max-width:780px;font-size:16px;line-height:1.95}.hero-disclosure{font-size:12px;max-width:800px;margin-top:10px}.hero-notes{display:flex;flex-wrap:wrap;gap:13px 24px;margin-top:23px;font-size:11px;color:#68807a}.hero-notes>span{display:flex;align-items:center;gap:7px}.hero-notes i{font-style:normal;color:var(--accent);font-weight:700}.download-launch{background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:26px 28px;box-shadow:0 9px 32px #274c3d04}.download-heading{display:grid;grid-template-columns:1fr 1fr;gap:0 36px;align-items:start;margin-bottom:23px}.download-heading .eyebrow{grid-column:1/-1;margin-bottom:5px}.download-heading h2{font-size:24px}.download-heading>p{font-size:12px;line-height:1.85;align-self:center}.device-options{display:grid;grid-template-columns:1fr 1fr;gap:18px}.device-card{display:flex;align-items:center;gap:16px;background:var(--soft);padding:22px;border:1px solid #cce4d9;border-radius:15px;transition:transform .18s,box-shadow .18s;min-width:0}.device-card:hover{transform:translateY(-3px);box-shadow:0 8px 20px #17453912}.device-card.android{background:var(--blue-soft);border-color:#d4e4ef;color:var(--blue)}.device-icon{width:49px;height:49px;background:#fff9;border-radius:13px;display:grid;place-items:center;color:var(--accent);flex-shrink:0}.android .device-icon{color:var(--blue)}.device-label{display:grid;line-height:1.5}.device-label small{font-size:10px;color:var(--muted);letter-spacing:1px;margin-bottom:3px}.device-label strong{font-size:20px;color:var(--text)}.device-arrow{margin-left:auto;width:31px;height:31px;display:grid;place-items:center;border-radius:50%;border:1px solid #b7d5c9;color:var(--accent);font-size:17px;flex-shrink:0}.android .device-arrow{border-color:#bed5e6;color:var(--blue)}.quick-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;padding:23px 0 32px}.quick-links a{position:relative;padding:0 18px;border-left:1px solid var(--line);min-width:0}.quick-links a:first-child{border:0;padding-left:0}.quick-links span{display:block;font-size:9px;letter-spacing:1px;color:var(--muted)}.quick-links strong{font-size:12px;font-weight:500;display:block;margin-top:2px;padding-right:18px}.quick-links b{position:absolute;right:0;bottom:0;font-weight:400;color:var(--accent)}.overview{border:1px solid var(--line);border-radius:20px;background:#edf4ef;padding:27px 28px}.overview-heading{display:grid;grid-template-columns:1.15fr 1fr;gap:35px;align-items:center}.overview h2{font-size:23px;line-height:1.5}.overview h2 br{display:none}.overview-heading>div:last-child{text-align:right}.overview-heading>div>p{font-size:12px;max-width:400px;margin-left:auto}.pill{display:inline-block;border:1px solid #c5dacd;padding:2px 10px;border-radius:20px;color:var(--accent);font-size:10px;margin-bottom:9px}.checklist{list-style:none;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin:24px 0 18px}.checklist li{display:flex;gap:12px;align-items:flex-start;min-width:0}.check-number{display:grid;place-items:center;background:#dcece1;color:var(--accent);border-radius:9px;font-size:11px;font-weight:700;width:31px;height:31px;flex-shrink:0}.checklist strong{font-size:12px;font-weight:650;display:block}.checklist small{font-size:11px;line-height:1.8;color:var(--muted);display:block;margin-top:4px}.panel-note{font-size:11px;padding-top:14px;border-top:1px solid #d7e5db}.section{padding:43px 0}.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:35px;margin-bottom:24px}.section-heading>p{max-width:330px;font-size:12px;line-height:1.9}.section-heading h2 br{display:none}.feature-list{display:grid;gap:12px}.feature-card{padding:24px 25px;border-radius:16px;background:var(--surface);border:1px solid var(--line);display:grid;grid-template-columns:42px 1fr;gap:18px}.card-number{width:36px;height:36px;display:grid;place-items:center;border-radius:10px;background:var(--soft);color:var(--accent);font-size:11px;font-weight:700}.feature-card>div{display:grid;grid-template-columns:180px 1fr;gap:28px;align-items:start}.feature-card h3{font-size:16px;line-height:1.6}.feature-card p{font-size:12px;line-height:1.9}.reading-layout{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(0,1fr);gap:27px;align-items:start;border-block:1px solid var(--line);padding:35px 0}.guide-section{padding:0}.guide-section .section-heading{margin-bottom:13px}.section-intro{font-size:12px;margin-bottom:25px}.timeline{display:grid;gap:0}.timeline article{display:grid;grid-template-columns:40px 1fr;gap:16px;position:relative;padding-bottom:27px}.timeline article:before{content:"";position:absolute;left:17px;top:34px;bottom:0;width:1px;background:#cadfd4}.timeline article:last-child:before{display:none}.timeline article:last-child{padding-bottom:0}.step-number{z-index:1;background:#fff;border:1px solid #bad5c8;border-radius:50%;color:var(--accent);font-size:11px;font-weight:700;width:35px;height:35px;display:grid;place-items:center}.timeline h3{font-size:16px;margin:3px 0 7px}.timeline p{font-size:12px;line-height:1.9;max-width:500px}.tips-panel{background:#eaf1f5;border:1px solid #dbe6ec;padding:27px;border-radius:18px}.tips-panel>.eyebrow{color:var(--blue)}.tips-panel>h2{font-size:23px}.tips-list article{padding:20px 0;border-bottom:1px solid #d5e1e8}.tips-list article:last-child{padding-bottom:0;border:0}.tips-list h3{font-size:15px;margin-bottom:7px}.tips-list p{font-size:12px;line-height:1.85}.faq-list{display:grid;gap:11px}details{background:#fff;border:1px solid var(--line);border-radius:13px;padding:19px 23px}summary{display:flex;justify-content:space-between;align-items:center;gap:25px;list-style:none;cursor:pointer;font-size:14px;font-weight:650}summary::-webkit-details-marker{display:none}summary:after{content:"+";font-size:21px;line-height:1;font-weight:400;color:var(--accent)}details[open] summary:after{content:"−"}details p{font-size:13px;line-height:1.95;margin-top:14px;max-width:900px;padding-right:25px}.related-section{border-top:1px solid var(--line);padding-top:33px}.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.related-card{position:relative;border-top:2px solid #bdd9cd;padding:20px 12px 0 0;min-width:0}.related-card h3{font-size:15px;margin-bottom:9px;padding-right:18px}.related-card p{font-size:12px;line-height:1.9}.related-arrow{position:absolute;right:0;top:21px;color:var(--accent)}.risk-note{font-size:11px;color:var(--muted);padding:0 0 27px}footer{border-top:1px solid var(--line);padding:25px 0 30px}.footer-top{display:flex;justify-content:space-between;gap:20px;font-size:12px;margin-bottom:9px}.footer-top>a{color:var(--accent)}footer>p{font-size:11px;line-height:1.9}.xxf-poollinks{padding:28px 40px 50px 272px;background:#eef4f0;font:12px/1.8 Arial,sans-serif;color:var(--muted)}.xxf-poollinks-inner{max-width:1100px;margin:0 auto}.xxf-poollinks h3{font-size:15px;margin-bottom:12px}.xxf-poollinks-list{display:flex;flex-wrap:wrap;gap:10px 20px}.xxf-poollinks a{text-decoration:underline;overflow-wrap:anywhere}
@media(min-width:1600px){.workspace{padding-inline:70px}.sidebar{width:250px;padding-inline:27px}.workspace{margin-left:250px}.hero{padding-top:65px}}
@media(max-width:1100px){.sidebar{width:196px;padding:29px 18px}.brand{font-size:13px}.brand-icon{width:35px;height:35px;font-size:23px}.brand small{font-size:9px}.workspace{margin-left:196px;padding-inline:28px}.feature-card>div{grid-template-columns:150px 1fr;gap:20px}.overview-heading{gap:20px}.reading-layout{gap:22px;grid-template-columns:1.2fr 1fr}.tips-panel{padding:23px}.checklist{gap:15px}.checklist li{gap:9px}.check-number{width:27px;height:27px}.xxf-poollinks{padding-left:224px}}
@media(max-width:860px){.sidebar{position:static;width:auto;padding:18px 25px;display:grid;grid-template-columns:1fr auto;gap:20px;border-right:0;border-bottom:1px solid var(--line)}.brand{font-size:15px;align-items:center}.brand small{display:none}.sidebar nav{margin:0;display:flex;align-items:center;gap:10px}.sidebar nav a{padding:6px 7px;font-size:12px;gap:5px}.nav-dot,.nav-arrow,.sidebar-bottom,.sidebar-download{display:none}.workspace{margin-left:0;padding-inline:28px}.topbar{min-height:57px}.hero{padding-top:38px}.hero h1{font-size:37px}.feature-card>div{grid-template-columns:160px 1fr}.xxf-poollinks{padding:25px 28px}}
@media(max-width:600px){.sidebar{padding:18px 20px 14px;display:block}.brand{font-size:16px;gap:11px}.brand-icon{width:35px;height:35px}.sidebar nav{margin-top:16px;border-top:1px solid #d6e7dd;padding-top:11px;justify-content:space-between;gap:10px}.sidebar nav a{padding:3px 0;color:#5d7770;font-size:12px}.workspace{padding-inline:20px}.topbar{min-height:52px;font-size:10px;gap:12px}.topbar>a>span{margin-left:4px}.hero{padding:32px 0 26px}.hero h1{font-size:31px;line-height:1.45;margin-bottom:16px}.hero-description{font-size:14px;line-height:1.95}.hero-disclosure{font-size:11px;line-height:1.9}.eyebrow{font-size:10px;letter-spacing:.2px}.hero-notes{gap:8px 14px;margin-top:18px;font-size:9px}.hero-notes>span{gap:5px}.download-launch{padding:21px 18px;border-radius:17px}.download-heading{display:block;margin-bottom:19px}.download-heading h2{font-size:22px;line-height:1.5}.download-heading>p{font-size:11px;margin-top:10px}.device-options{gap:11px}.device-card{padding:17px 12px;display:grid;grid-template-columns:1fr auto;gap:11px;border-radius:12px}.device-icon{width:36px;height:36px;border-radius:10px;grid-column:1}.device-icon svg{width:23px;height:23px}.device-label{grid-column:1;grid-row:2}.device-label strong{font-size:16px}.device-label small{font-size:9px;margin-bottom:3px}.device-arrow{grid-column:2;grid-row:2;width:25px;height:25px;font-size:14px;align-self:end}.quick-links{gap:10px;padding:21px 0 26px}.quick-links a{padding-left:10px}.quick-links span{font-size:8px;letter-spacing:0}.quick-links strong{font-size:10px;padding-right:0;line-height:1.7}.quick-links b{display:none}.overview{padding:22px 20px;border-radius:16px}.overview-heading{display:block}.overview h2{font-size:21px;line-height:1.6}.overview-heading>div:last-child{display:flex;align-items:flex-start;gap:12px;text-align:left;margin-top:13px}.overview-heading>div>p{font-size:11px;margin:0}.pill{white-space:nowrap;font-size:9px;padding:2px 8px;line-height:1.8;margin:0}.checklist{grid-template-columns:1fr;gap:17px;margin:21px 0 17px}.checklist li{gap:12px}.check-number{width:30px;height:30px}.checklist small{margin-top:2px}.panel-note{font-size:10px}.section{padding:31px 0}h2{font-size:23px;line-height:1.5}.section-heading{display:block;margin-bottom:20px}.section-heading>p{font-size:11px;margin-top:10px;max-width:none}.feature-card{grid-template-columns:29px 1fr;gap:13px;padding:20px 18px;border-radius:13px}.card-number{width:28px;height:28px;font-size:10px;border-radius:8px}.feature-card>div{display:block}.feature-card h3{font-size:15px;margin-bottom:7px}.feature-card p{font-size:11px;line-height:1.95}.reading-layout{grid-template-columns:1fr;gap:28px;padding:28px 0}.guide-section{padding:0}.timeline article{gap:13px;padding-bottom:23px}.timeline p{font-size:11px;line-height:1.95}.timeline h3{font-size:15px}.tips-panel{padding:23px 21px;border-radius:15px}.tips-panel>h2{font-size:22px}.tips-list p{font-size:11px}.tips-list article{padding:18px 0}.faq-list{gap:10px}details{padding:17px 18px;border-radius:12px}summary{font-size:13px;gap:18px}details p{font-size:11px;padding-right:0;line-height:2}.related-grid{grid-template-columns:1fr;gap:22px}.related-card{padding-top:15px}.related-arrow{top:15px}.related-card h3{font-size:14px;margin-bottom:6px}.related-card p{font-size:11px}.risk-note{font-size:10px;line-height:1.9;padding-bottom:22px}footer{padding-top:20px}.footer-top{font-size:11px}footer>p{font-size:10px}.xxf-poollinks{padding:22px 20px 35px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.device-card{transition:none}}