:root{--ms-blue:#0078d4;--ms-blue-dark:#005a9e;--ms-blue-light:#e8f4fc;--ms-green:#107c10;--text:#1b1b1b;--text-muted:#5c5c5c;--border:#e5e5e5;--bg:#f3f6f9;--white:#ffffff;--shadow:0 8px 28px rgba(0,60,120,0.08);--radius:12px;--max:1120px;--font:"Segoe UI","Microsoft YaHei UI","Microsoft YaHei","PingFang SC",sans-serif;}*,*::before,*::after{box-sizing:border-box;}html{scroll-behavior:smooth;}body{margin:0;font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.65;padding-bottom:88px;}img{max-width:100%;height:auto;display:block;}a{color:var(--ms-blue);text-decoration:none;}a:hover{text-decoration:underline;}.container{width:min(100% - 32px,var(--max));margin-inline:auto;}.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,0.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);}.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px;}.logo{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:700;font-size:1.05rem;text-decoration:none;}.logo:hover{text-decoration:none;color:var(--ms-blue);}.logo-mark{width:32px;height:32px;border-radius:8px;object-fit:cover;display:block;flex-shrink:0;}.nav{display:flex;flex-wrap:wrap;gap:6px 18px;align-items:center;}.nav a{color:var(--text-muted);font-size:0.95rem;text-decoration:none;}.nav a:hover,.nav a.active{color:var(--ms-blue);}.nav-toggle{display:none;width:42px;height:42px;padding:0;border:1px solid var(--border);border-radius:10px;background:var(--white);cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:5px;flex-shrink:0;}.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:transform 0.2s ease,opacity 0.2s ease;}.site-header.nav-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg);}.site-header.nav-open .nav-toggle span:nth-child(2){opacity:0;}.site-header.nav-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;border-radius:999px;padding:12px 22px;font:inherit;font-weight:650;cursor:pointer;text-decoration:none;transition:transform 0.15s ease,background 0.15s ease,box-shadow 0.15s ease;}.btn:hover{text-decoration:none;transform:translateY(-1px);}.btn-primary{background:var(--ms-blue);color:#fff;box-shadow:0 6px 18px rgba(0,120,212,0.28);}.btn-primary:hover{background:var(--ms-blue-dark);color:#fff;}.btn-secondary{background:var(--white);color:var(--ms-blue);border:1px solid #cce4f7;}.btn-secondary:hover{background:var(--ms-blue-light);color:var(--ms-blue-dark);}.btn-lg{padding:14px 28px;font-size:1.05rem;}.hero{position:relative;overflow:hidden;background:radial-gradient(ellipse 80% 60% at 90% 10%,rgba(0,164,239,0.18),transparent 55%),radial-gradient(ellipse 60% 50% at 0% 100%,rgba(0,120,212,0.12),transparent 50%),linear-gradient(180deg,#ffffff 0%,#eef5fb 100%);border-bottom:1px solid var(--border);}.hero-grid{display:grid;grid-template-columns:1.1fr 0.9fr;gap:40px;align-items:center;padding:56px 0 64px;}.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border-radius:999px;background:var(--ms-blue-light);color:var(--ms-blue-dark);font-size:0.85rem;font-weight:600;margin-bottom:16px;}.hero h1{margin:0 0 14px;font-size:clamp(1.9rem,4vw,2.6rem);line-height:1.2;letter-spacing:-0.02em;}.hero-lead{margin:0 0 22px;color:var(--text-muted);font-size:1.08rem;max-width:36em;}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:22px;}.trust-list{display:flex;flex-wrap:wrap;gap:10px 18px;padding:0;margin:0;list-style:none;color:var(--text-muted);font-size:0.92rem;}.trust-list li::before{content:"✓";color:var(--ms-green);font-weight:700;margin-right:6px;}.hero-visual{border-radius:18px;overflow:hidden;box-shadow:var(--shadow);border:1px solid rgba(255,255,255,0.8);background:#fff;}.hero-visual img{width:100%;aspect-ratio:16 / 11;object-fit:cover;}.section{padding:64px 0;}.section-alt{background:var(--white);border-block:1px solid var(--border);}.section-head{max-width:720px;margin-bottom:36px;}.section-head h2{margin:0 0 10px;font-size:clamp(1.45rem,2.5vw,1.85rem);letter-spacing:-0.02em;}.section-head p{margin:0;color:var(--text-muted);}.grid-3,.grid-2{display:grid;gap:20px;}.grid-3{grid-template-columns:repeat(3,1fr);}.grid-2{grid-template-columns:repeat(2,1fr);}.card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:0 2px 10px rgba(0,0,0,0.02);}.section-alt .card{background:var(--bg);}.card h3{margin:0 0 8px;font-size:1.1rem;}.card p{margin:0;color:var(--text-muted);font-size:0.95rem;}.card-icon{width:42px;height:42px;border-radius:10px;display:grid;place-items:center;background:var(--ms-blue-light);color:var(--ms-blue);font-weight:800;margin-bottom:14px;}.feature-media{border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);background:#fff;}.feature-media img{width:100%;aspect-ratio:16 / 10;object-fit:cover;}.feature-row{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center;}.feature-row.reverse .feature-copy{order:2;}.feature-row.reverse .feature-media{order:1;}.feature-copy h3{margin:0 0 10px;font-size:1.35rem;}.feature-copy p{margin:0 0 14px;color:var(--text-muted);}.feature-copy ul{margin:0;padding-left:1.15em;color:var(--text-muted);}.feature-copy li+li{margin-top:6px;}.steps{display:grid;gap:16px;counter-reset:step;}.step{display:grid;grid-template-columns:48px 1fr;gap:16px;align-items:start;background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:18px 20px;}.step-num{width:48px;height:48px;border-radius:50%;background:var(--ms-blue);color:#fff;display:grid;place-items:center;font-weight:800;font-size:1.1rem;}.step h3{margin:4px 0 6px;font-size:1.05rem;}.step p{margin:0;color:var(--text-muted);font-size:0.95rem;}.guide-steps{display:grid;gap:28px;}.guide-step{display:grid;gap:18px;background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);}.guide-step-copy{display:grid;grid-template-columns:48px 1fr;gap:16px;align-items:start;}.guide-step-copy h3{margin:4px 0 8px;font-size:1.15rem;}.guide-step-copy p{margin:0 0 12px;color:var(--text-muted);}.tip-list{margin:0;padding-left:1.15em;color:var(--text-muted);font-size:0.95rem;}.tip-list li+li{margin-top:6px;}.guide-shot{margin:0;border-radius:10px;overflow:hidden;border:1px solid var(--border);background:#0b0b0b;}.guide-shot img{width:100%;aspect-ratio:auto;object-fit:contain;background:#111;}.guide-shot figcaption{padding:10px 14px;font-size:0.88rem;color:var(--text-muted);background:var(--white);border-top:1px solid var(--border);}.kbd{display:inline-block;padding:1px 7px;border-radius:6px;background:#f0f0f0;border:1px solid #ddd;font-size:0.88em;font-family:Consolas,"Courier New",monospace;}.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius);background:var(--white);}table{width:100%;border-collapse:collapse;font-size:0.95rem;}th,td{text-align:left;padding:14px 16px;border-bottom:1px solid var(--border);vertical-align:top;}th{background:var(--ms-blue-light);color:var(--ms-blue-dark);font-weight:650;}tr:last-child td{border-bottom:none;}.faq details{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:14px 18px;margin-bottom:10px;}.faq summary{cursor:pointer;font-weight:650;list-style:none;}.faq summary::-webkit-details-marker{display:none;}.faq summary::after{content:"+";float:right;color:var(--ms-blue);font-weight:700;}.faq details[open] summary::after{content:"–";}.faq details p{margin:12px 0 4px;color:var(--text-muted);}.cta-band{background:linear-gradient(135deg,#0078d4,#005a9e 60%,#004578);color:#fff;border-radius:18px;padding:36px 28px;display:flex;flex-wrap:wrap;gap:18px;align-items:center;justify-content:space-between;box-shadow:0 12px 32px rgba(0,90,158,0.28);}.cta-band h2{margin:0 0 8px;font-size:1.45rem;}.cta-band p{margin:0;opacity:0.92;max-width:40em;}.cta-band .btn-primary{background:#fff;color:var(--ms-blue-dark);box-shadow:none;}.cta-band .btn-primary:hover{background:#f3f8fc;}.notice{margin-top:18px;padding:14px 16px;border-radius:10px;background:#fff8e8;border:1px solid #f0dfa0;color:#6b5600;font-size:0.92rem;}.breadcrumb{padding:18px 0 0;color:var(--text-muted);font-size:0.9rem;}.breadcrumb a{color:var(--text-muted);}.page-hero{padding:28px 0 8px;}.page-hero h1{margin:0 0 10px;font-size:clamp(1.6rem,3vw,2.1rem);}.page-hero p{margin:0;color:var(--text-muted);max-width:48em;}.site-footer{background:#0f1c2e;color:#c9d4e0;padding:48px 0 28px;}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:28px;margin-bottom:28px;}.site-footer h3{margin:0 0 12px;color:#fff;font-size:1rem;}.site-footer a{color:#c9d4e0;}.site-footer ul{list-style:none;margin:0;padding:0;}.site-footer li+li{margin-top:8px;}.footer-brand{font-weight:700;color:#fff;font-size:1.1rem;margin-bottom:10px;}.footer-note{font-size:0.88rem;line-height:1.6;opacity:0.85;margin:0 0 10px;}.footer-contact{margin:14px 0 0;font-size:0.9rem;}.footer-contact a{color:#9ec9f5;text-decoration:none;word-break:break-all;}.footer-contact a:hover{color:#fff;text-decoration:underline;}.friend-links{display:flex;flex-wrap:wrap;align-items:center;gap:8px 16px;margin-bottom:18px;padding-top:18px;border-top:1px solid rgba(255,255,255,0.1);font-size:0.88rem;}.friend-links-label{color:#fff;font-weight:600;}.friend-links a{color:#9ec9f5;}.friend-links a:hover{color:#fff;}.footer-bottom{border-top:1px solid rgba(255,255,255,0.1);padding-top:18px;font-size:0.85rem;opacity:0.75;}.download-stats{display:block;margin-top:8px;font-size:0.78rem;opacity:0.85;letter-spacing:0.02em;}.footer-sponsor{display:flex;flex-wrap:wrap;align-items:center;margin-top:16px;padding-top:16px;border-top:1px solid rgba(255,255,255,0.08);}.footer-sponsor-link{display:inline-flex;align-items:center;line-height:0;padding:6px 10px;background:#fff;border-radius:8px;opacity:0.95;transition:opacity 0.2s ease,box-shadow 0.2s ease;}.footer-sponsor-link:hover{opacity:1;text-decoration:none;box-shadow:0 0 0 1px rgba(255,255,255,0.35);}.footer-sponsor-link img{display:block;height:36px;width:auto;max-width:150px;object-fit:contain;object-position:left center;}body.qr-modal-open{overflow:hidden;}.qr-modal{position:fixed;inset:0;z-index:1000;display:flex;align-items:center;justify-content:center;padding:24px;opacity:0;visibility:hidden;transition:opacity 0.2s ease,visibility 0.2s ease;}.qr-modal[hidden]{display:none !important;}.qr-modal.show{opacity:1;visibility:visible;}.qr-modal-backdrop{position:absolute;inset:0;background:rgba(15,28,46,0.55);backdrop-filter:blur(4px);}.qr-modal-panel{position:relative;z-index:1;width:min(100%,360px);background:var(--white);border-radius:16px;padding:28px 24px 22px;text-align:center;box-shadow:0 20px 50px rgba(0,40,90,0.22);transform:translateY(12px) scale(0.98);transition:transform 0.22s ease;}.qr-modal.show .qr-modal-panel{transform:translateY(0) scale(1);}.qr-modal-close{position:absolute;top:10px;right:12px;width:36px;height:36px;border:0;border-radius:8px;background:transparent;color:var(--text-muted);font-size:1.6rem;line-height:1;cursor:pointer;}.qr-modal-close:hover{background:var(--ms-blue-light);color:var(--ms-blue-dark);}.qr-modal-title{margin:0 0 8px;font-size:1.25rem;color:var(--text);}.qr-modal-desc{margin:0 0 16px;font-size:0.95rem;color:var(--text-muted);}.qr-modal-code{display:inline-flex;padding:12px;background:#fff;border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow);}.qr-modal-code img{width:220px;height:220px;object-fit:contain;}.qr-modal-tip{margin:14px 0 0;font-size:0.75rem;color:var(--text-muted);}.qr-modal-direct{color:#8a8a8a;text-decoration:underline;text-underline-offset:2px;}.qr-modal-direct:hover{color:var(--ms-blue);}.float-download{position:fixed;left:0;right:0;bottom:0;z-index:200;transform:translateY(110%);transition:transform 0.28s ease,opacity 0.28s ease;opacity:0;pointer-events:none;}.float-download.show{transform:translateY(0);opacity:1;pointer-events:auto;}.float-inner{margin:0 auto 12px;width:min(100% - 24px,720px);background:rgba(15,28,46,0.94);backdrop-filter:blur(10px);color:#fff;border-radius:16px;padding:12px 14px;display:flex;align-items:center;justify-content:space-between;gap:12px;box-shadow:0 10px 30px rgba(0,0,0,0.28);}.float-inner strong{display:block;font-size:0.95rem;}.float-inner span{font-size:0.8rem;opacity:0.78;}.float-inner .btn{padding:10px 18px;white-space:nowrap;}.cover-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;}.cover-grid figure{margin:0;background:#fff;border:1px solid var(--border);border-radius:12px;overflow:hidden;}.cover-grid img{width:100%;aspect-ratio:1;object-fit:cover;}.cover-grid figcaption{padding:10px 12px;font-size:0.85rem;color:var(--text-muted);}.disclaimer{display:grid;gap:16px;}.disclaimer .card h2{margin:0 0 10px;font-size:1.15rem;}.disclaimer .card p{margin:0 0 10px;color:var(--text-muted);}.disclaimer .card p:last-child{margin-bottom:0;}.disclaimer-meta{margin-top:12px !important;font-size:0.88rem;opacity:0.8;}.footer-bottom a{color:inherit;text-decoration:underline;text-underline-offset:2px;}@media (max-width:960px){.hero-grid,.feature-row,.feature-row.reverse,.footer-grid,.grid-3{grid-template-columns:1fr;}.feature-row.reverse .feature-copy,.feature-row.reverse .feature-media{order:initial;}.cover-grid{grid-template-columns:repeat(2,1fr);}.header-inner{flex-wrap:wrap;position:relative;}.nav-toggle{display:flex;margin-left:auto;}.header-cta{display:none;}.nav{display:none;width:100%;order:5;flex-direction:column;align-items:stretch;gap:0;padding:8px 0 12px;border-top:1px solid var(--border);}.site-header.nav-open .nav{display:flex;}.nav a{padding:12px 4px;border-bottom:1px solid var(--border);font-size:1rem;}.nav a:last-child{border-bottom:none;color:#fff;background:var(--ms-blue);border-radius:10px;margin-top:10px;padding:12px 16px;text-align:center;font-weight:650;}.nav a:last-child:hover,.nav a:last-child.active{color:#fff;background:var(--ms-blue-dark);}.guide-step{padding:16px;}}@media (max-width:640px){.grid-2,.cover-grid{grid-template-columns:1fr;}.float-inner{flex-direction:column;align-items:stretch;text-align:center;}.cta-band{text-align:center;justify-content:center;}}