:root{--ink:#141816;--ink-soft:#3a423c;--muted:#5c6560;--line:#1418161a;--line-strong:#1418162e;--paper:#f7f8f6;--panel:#fff;--panel-soft:#eef3f0;--cta:#1f6b57;--cta-hover:#175445;--accent-deep:#1a5646;--accent-soft:#1f6b571a;--cta-rgb:31, 107, 87;--google:#1f6b57;--apple:#2a3630;--radius:10px;--radius-sm:8px;--radius-xs:6px;--max:1160px;--page-pad:clamp(1.35rem, 3.8vw, 2.35rem);--font:"PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;--display:"PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;--text-xs:.82rem;--text-sm:.95rem;--text-base:1.06rem;--text-md:1.15rem;--text-lg:1.35rem;--text-xl:clamp(1.75rem, 3.1vw, 2.2rem);--text-2xl:clamp(2.2rem, 4.5vw, 3.05rem);--text-hero:clamp(2.9rem, 6vw, 4.25rem);--leading-tight:1.18;--leading-snug:1.5;--leading-body:1.82}*,:before,:after{box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:var(--font);font-size:var(--text-base);color:var(--ink);background:var(--paper);font-weight:400;line-height:var(--leading-body);-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility;min-height:100vh;margin:0}img{max-width:100%;display:block}a{color:var(--accent-deep);text-underline-offset:.2em;text-decoration-thickness:1px}a:hover{color:var(--ink)}:focus-visible{outline:2px solid var(--cta);outline-offset:2px}.container{width:100%;max-width:var(--max);padding-inline:var(--page-pad);margin-inline:auto}.site-header{z-index:40;backdrop-filter:blur(16px);border-bottom:1px solid var(--line);background:#f7f8f6eb;position:sticky;top:0}.header-inner{justify-content:space-between;align-items:center;gap:1.15rem;min-height:4.35rem;display:flex}.brand{color:var(--ink);align-items:center;gap:.75rem;text-decoration:none;display:inline-flex}.brand:hover{color:var(--ink)}.brand-mark-img{object-fit:cover;border-radius:.5rem;flex-shrink:0;width:2.25rem;height:2.25rem;display:block}.brand-text{flex-direction:column;gap:.08rem;line-height:1.1;display:flex}.brand-name{letter-spacing:-.02em;font-size:1.12rem;font-weight:700}.brand-tag{color:var(--muted);font-size:var(--text-xs);font-weight:500}.nav{align-items:center;gap:.25rem .85rem;display:flex}.nav a:not(.btn){color:var(--ink-soft);white-space:nowrap;border-bottom:2px solid #0000;padding:.35rem 0;font-size:.9rem;font-weight:500;text-decoration:none}.nav a:not(.btn)[aria-current=page]{color:var(--ink);border-bottom-color:var(--cta)}.nav a:not(.btn):hover{color:var(--ink)}.nav-toggle{border:1px solid var(--line-strong);background:var(--panel);border-radius:var(--radius-xs);font:inherit;font-size:var(--text-sm);color:var(--ink);padding:.5rem .9rem;font-weight:600;display:none}.btn{border-radius:var(--radius-xs);min-height:2.7rem;font:inherit;font-size:var(--text-sm);letter-spacing:-.01em;cursor:pointer;box-shadow:none;border:1px solid #0000;justify-content:center;align-items:center;gap:.4rem;padding:.6rem 1.3rem;font-weight:600;line-height:1.2;text-decoration:none;transition:background .15s,color .15s,border-color .15s;display:inline-flex}.btn-primary{background:var(--cta);border-color:var(--cta);color:#fff!important}.btn-primary:hover{background:var(--cta-hover);border-color:var(--cta-hover);color:#fff!important}.btn-secondary{background:var(--panel);border-color:var(--line-strong);color:var(--ink)!important}.btn-secondary:hover{border-color:rgba(var(--cta-rgb), .45);background:var(--panel-soft);color:var(--ink)!important}.nav .btn-primary,.nav .btn-primary:hover,.site-header .btn-primary,.site-header .btn-primary:hover{color:#fff!important}.site-header .btn{min-height:2.35rem;padding:.45rem 1rem}.tg-icon{flex-shrink:0;width:1.05em;height:1.05em;display:block}.nav-actions{align-items:center;gap:.45rem;margin-left:.15rem;display:inline-flex}.nav-actions .btn{white-space:nowrap}.hero{background:#1a2a24;border-bottom:1px solid #1418161f;align-items:stretch;display:flex;position:relative;overflow:hidden}.hero-bg{background:radial-gradient(55% 70% at 88% 40%,#1f6b578c,#0000 60%),radial-gradient(40% 50% at 12% 90%,#e4b84a1f,#0000 50%),linear-gradient(135deg,#15241f 0%,#1c332b 45%,#203a32 100%);position:absolute;inset:0}.hero-visual{opacity:.22;pointer-events:none;width:min(280px,32vw);height:min(280px,32vw);position:absolute;top:50%;right:clamp(1rem,8vw,6rem);transform:translateY(-50%)}.hero-visual img{object-fit:contain;width:100%;height:100%}.hero-copy{z-index:1;width:100%;max-width:var(--max);padding:3.25rem var(--page-pad) 3.6rem;color:#fff;margin-inline:auto;position:relative}.hero h1{max-width:16em;font-family:var(--display);font-size:var(--text-hero);line-height:var(--leading-tight);letter-spacing:-.03em;color:#fff;margin:0;font-weight:700}.hero-lead{color:#ffffffe0;max-width:40rem;font-size:clamp(1.1rem,1.65vw,1.25rem);line-height:var(--leading-body);margin:1.35rem 0 0}.hero-actions{flex-wrap:wrap;gap:.9rem;margin-top:2rem;display:flex}.hero .btn{min-height:2.85rem;padding:.7rem 1.4rem}.hero .btn-primary{background:var(--cta);border-color:var(--cta);color:#fff!important}.hero .btn-primary:hover{background:#258a6e;border-color:#258a6e;color:#fff!important}.hero .btn-secondary{background:#ffffff1a;border-color:#ffffff8c;color:#fff!important}.hero .btn-secondary:hover{background:#ffffff29;border-color:#fff;color:#fff!important}.section{padding:3rem 0 3.5rem}.home-stack,.content-stack{gap:2.6rem;display:grid}.block{min-width:0}.section-head{justify-content:space-between;align-items:baseline;gap:1rem;margin-bottom:1.05rem;display:flex}.section-head h2{font-family:var(--font);letter-spacing:-.02em;font-size:1.28rem;font-weight:700;line-height:var(--leading-tight);color:var(--ink);margin:0}.section-head p{color:var(--muted);font-size:var(--text-sm);line-height:var(--leading-snug);margin:0}.section-head a{color:var(--cta);font-weight:600;text-decoration:none}.section-head a:hover{color:var(--cta-hover)}.scope-block{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-sm);gap:.75rem;padding:1.35rem 1.4rem;display:grid}.scope-block p{font-size:var(--text-base);color:var(--ink-soft);line-height:var(--leading-snug);margin:0}.scope-block strong{color:var(--ink);margin-right:.4rem}.product-list,.guide-list,.faq-list{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-sm);gap:0;list-style:none;display:grid;overflow:hidden}.guide-list-compact{grid-template-columns:1fr}.product-row,.guide-item{color:var(--ink);border-bottom:1px solid var(--line);background:0 0;align-items:center;gap:.55rem 1.15rem;padding:1.1rem 1.25rem;text-decoration:none;transition:background .15s;display:grid}.product-row{grid-template-columns:1.2fr 1.6fr auto}.guide-item{grid-template-columns:1fr;align-items:start}.product-list>:last-child,.guide-list>:last-child,.faq-list>:last-child{border-bottom:none}.product-row:hover,.guide-item:hover{background:var(--panel-soft);color:var(--ink)}.product-row strong,.guide-item strong{font-size:var(--text-base);font-weight:700}.guide-item strong{margin-bottom:.2rem;display:block}.product-row span,.guide-item span{color:var(--muted);font-size:var(--text-sm);line-height:var(--leading-snug)}.product-row em{font-style:normal;font-size:var(--text-sm);color:var(--cta);font-weight:600}.page-intro{border-bottom:1px solid var(--line);background:var(--panel-soft);padding:2.4rem 0 2rem}.page-intro.platform-google{box-shadow:inset 0 -3px 0 var(--google)}.page-intro.platform-apple{box-shadow:inset 0 -3px 0 var(--apple)}.breadcrumb{color:var(--muted);font-size:var(--text-xs);flex-wrap:wrap;gap:.3rem;margin:0 0 .7rem;padding:0;font-weight:500;list-style:none;display:flex}.breadcrumb li{align-items:center;gap:.3rem;display:inline-flex}.breadcrumb a{color:var(--muted);text-decoration:none}.breadcrumb a:hover{color:var(--ink)}.page-intro-row{justify-content:space-between;align-items:flex-end;gap:1.5rem;display:flex}.page-intro h1{font-family:var(--display);letter-spacing:-.025em;font-size:clamp(2.05rem,3.8vw,2.65rem);font-weight:700;line-height:var(--leading-tight);margin:0}.page-intro-lead{max-width:42rem;color:var(--ink-soft);font-size:var(--text-md);line-height:var(--leading-body);margin:.8rem 0 0}.page-meta{color:var(--ink-muted,var(--ink-soft));font-size:var(--text-sm,.875rem);margin:.55rem 0 0;line-height:1.4}.page-intro-actions{flex-wrap:wrap;flex-shrink:0;gap:.55rem;display:flex}.page-intro-actions .btn{min-height:2.5rem;padding:.5rem 1.1rem}.content-panel{padding:2.6rem 0 4rem}.page-short .content-panel{padding-top:2rem}.prose.container,.container.prose{max-width:var(--max)}.hub-overview{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-sm);padding:1.5rem 1.45rem}.hub-overview>:first-child,.hub-overview>h2:first-child{margin-top:0}.hub-overview>:last-child{margin-bottom:0}.notice-box{border-left:3px solid var(--cta);background:var(--panel-soft);border-radius:0 var(--radius-xs) var(--radius-xs) 0;color:var(--ink-soft);font-size:var(--text-sm);line-height:var(--leading-snug);margin:1.25rem 0 0;padding:.95rem 1.1rem}.prose h2{letter-spacing:-.02em;font-size:1.3rem;font-weight:700;line-height:var(--leading-snug);color:var(--ink);margin:2.25rem 0 .8rem}.prose h3{color:var(--ink);margin:1.55rem 0 .5rem;font-size:1.12rem;font-weight:700}.prose p,.prose li{color:var(--ink-soft);font-size:var(--text-base)}.prose p{margin:.85rem 0}.prose ul,.prose ol{margin:.65rem 0 1rem;padding-left:1.2rem}.prose li+li{margin-top:.35rem}.prose .process-list,.prose .point-list,.prose ol.process-list,.prose ul.point-list{margin-left:0;margin-block:.75rem 0;padding-left:0;list-style:none}.prose .process-list>li+li,.prose .point-list>li+li{margin-top:0}.prose .choose-steps,.prose ol.choose-steps{margin:.65rem 0 0;padding-left:1.2rem;list-style:decimal}.prose .choose-steps>li+li{margin-top:.4rem}.prose strong{color:var(--ink);font-weight:700}.compare-table{border-collapse:collapse;width:100%;font-size:var(--text-sm);background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-sm);margin:1rem 0 1.25rem;overflow:hidden}.compare-table th,.compare-table td{text-align:left;vertical-align:top;border-bottom:1px solid var(--line);line-height:var(--leading-snug);padding:.75rem 1rem}.compare-table th{background:var(--panel-soft);color:var(--ink);font-weight:700;font-size:var(--text-sm);letter-spacing:0;text-transform:none}.compare-table tr:nth-child(2n) td{background:#eef3f073}.compare-table tr:last-child td{border-bottom:none}.faq-block{margin-top:0}.faq-block>h2{margin:0 0 1rem;font-size:1.28rem}.faq-item{border:none;border-bottom:1px solid var(--line);background:0 0;padding:0 1.2rem}.faq-item:last-child{border-bottom:none}.faq-item summary{cursor:pointer;font-weight:600;font-size:var(--text-base);color:var(--ink);padding:1rem 0;list-style:none}.faq-item summary:hover{color:var(--cta)}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:after{content:"+";float:right;color:var(--cta);font-weight:600}.faq-item[open] summary:after{content:"–"}.faq-item p{color:var(--ink-soft);font-size:var(--text-sm);line-height:var(--leading-snug);margin:0 0 1rem}.cross-links{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-sm);color:var(--ink-soft);font-size:var(--text-sm);margin:0;padding:1.1rem 1.25rem;font-weight:500}.cross-links a{font-weight:600;text-decoration:none}.choose-steps{margin:.65rem 0 0;padding-left:1.2rem}.choose-steps li{font-size:var(--text-base);margin:.4rem 0}.point-list{gap:.55rem;margin:.5rem 0 0;padding:0;list-style:none;display:grid}.point-list li{background:var(--panel);border:1px solid var(--line);border-left:3px solid var(--cta);border-radius:0 var(--radius-xs) var(--radius-xs) 0;color:var(--ink-soft);font-size:var(--text-base);line-height:var(--leading-snug);margin:0;padding:.85rem 1rem}.cta-band{border:1px solid rgba(var(--cta-rgb), .22);border-radius:var(--radius-sm);background:linear-gradient(#f3f8f5 0%,#e7f1ec 100%);justify-content:space-between;align-items:center;gap:1.35rem;margin:0;padding:1.35rem 1.4rem;display:flex}.cta-band-copy{min-width:0}.cta-band h2{font-size:var(--text-md);font-family:var(--font);color:var(--ink);margin:0 0 .3rem;font-weight:700}.cta-band p{color:var(--muted);font-size:var(--text-sm);line-height:var(--leading-snug);margin:0}.cta-band .btn{flex-shrink:0;min-height:2.7rem}.process-list{counter-reset:step;gap:.75rem;margin:.75rem 0 0;padding:0;list-style:none;display:grid}.process-list li{counter-increment:step;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-sm);color:var(--ink-soft);font-size:var(--text-base);line-height:var(--leading-snug);padding:1rem 1.15rem 1rem 3.25rem;position:relative}.process-list li:before{content:counter(step);background:var(--cta);color:#fff;width:1.6rem;height:1.6rem;font-size:var(--text-xs);border-radius:999px;place-items:center;font-weight:700;display:grid;position:absolute;top:1rem;left:1rem}.site-footer{border-top:1px solid var(--line);color:var(--muted);font-size:var(--text-sm);background:#e4ebe6;padding:2.4rem 0 1.75rem}.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:1.75rem 1.5rem;display:grid}.footer-brand-row{align-items:center;gap:.65rem;margin-bottom:.55rem;display:flex}.footer-brand-row img{border-radius:.45rem;width:2rem;height:2rem}.footer-brand{color:var(--ink);font-weight:700;font-size:var(--text-md);letter-spacing:-.02em}.footer-grid h3{color:var(--ink);font-size:var(--text-xs);letter-spacing:.06em;text-transform:uppercase;margin:0 0 .55rem;font-weight:700}.footer-grid a{color:var(--ink-soft);font-size:var(--text-sm);margin-bottom:.35rem;font-weight:500;text-decoration:none;display:block}.footer-grid a:hover{color:var(--cta)}.footer-desc,.footer-contact{max-width:24rem;font-size:var(--text-sm);line-height:var(--leading-snug);margin:0 0 .4rem}.footer-tg-row{margin-bottom:.55rem}.footer-tg-link{align-items:center;gap:.4rem;font-weight:600;color:var(--cta)!important;margin-bottom:0!important;display:inline-flex!important}.footer-tg-link:hover{color:var(--cta-hover)!important}.footer-tg-link .tg-icon{color:#26a5e4;width:1.15em;height:1.15em}.footer-legal{border-top:1px solid var(--line);text-align:center;margin-top:1.75rem;padding-top:1.1rem}.footer-copy{color:var(--muted);font-size:var(--text-xs);margin:0}.reveal{animation:.65s both rise}.reveal-delay-1{animation-delay:80ms}.reveal-delay-2{animation-delay:.16s}@keyframes rise{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.blog-meta{color:var(--muted);font-size:var(--text-xs);flex-wrap:wrap;gap:.35rem 1rem;margin:.85rem 0 0;display:flex}.blog-meta a{color:var(--cta);font-weight:600;text-decoration:none}.blog-toc{background:var(--panel);border:1px solid var(--line);border-left:3px solid var(--cta);border-radius:var(--radius-sm);font-size:var(--text-sm);padding:1rem 1.25rem}.blog-toc strong{color:var(--ink);margin-bottom:.4rem;display:block}.blog-toc ol{columns:2;column-gap:2rem;margin:0;padding-left:1.2rem}.blog-toc li{break-inside:avoid;padding:.15rem 0}.blog-toc a{color:var(--ink-soft);text-decoration:none}.blog-toc a:hover{color:var(--cta)}.blog-prose{max-width:50rem}.blog-prose h2,.blog-prose h3{scroll-margin-top:5rem}.blog-prose a{color:var(--cta);text-underline-offset:.18em}.blog-prose img{border-radius:var(--radius-xs);max-width:100%;height:auto}.blog-cover{margin:0 0 1.25rem}.blog-cover img{aspect-ratio:3/2;object-fit:cover;width:100%;display:block}.blog-prose table{border-collapse:collapse;width:100%;font-size:var(--text-sm);margin:1rem 0 1.25rem}.blog-prose th,.blog-prose td{border:1px solid var(--line);text-align:left;vertical-align:top;line-height:var(--leading-snug);padding:.6rem .75rem}.blog-prose th{background:var(--panel-soft);color:var(--ink);font-weight:700}.blog-prose blockquote{border-left:3px solid var(--cta);background:var(--panel-soft);border-radius:0 var(--radius-xs) var(--radius-xs) 0;margin:1.1rem 0;padding:.85rem 1.1rem}.blog-prose blockquote p{margin:.35rem 0}.blog-prose code{background:var(--panel-soft);border-radius:4px;padding:.1em .35em;font-size:.92em}.blog-pager{color:var(--muted);font-size:var(--text-sm);justify-content:center;align-items:center;gap:1rem;display:flex}@media (width<=980px){:root{--page-pad:1.15rem}.product-row,.footer-grid,.page-intro-row,.cta-band{flex-direction:column;grid-template-columns:1fr;align-items:stretch}.hero-visual{opacity:.12;width:180px;height:180px;right:-1rem}.hero-copy{padding-block:2.4rem 2.75rem}.hero .btn{flex:auto;min-width:min(100%,10rem)}.brand-tag{display:none}.product-row{grid-template-columns:1fr auto}.product-row span{grid-column:1/-1}.page-intro-actions{margin-top:.85rem}.cta-band .btn{width:100%}.nav-toggle{display:inline-flex}.nav{border-bottom:1px solid var(--line);background:#f7f8f6fa;flex-direction:column;align-items:stretch;gap:.15rem;padding:.85rem 1.25rem 1.1rem;display:none;position:absolute;top:100%;left:0;right:0}.nav.is-open{display:flex}.nav a:not(.btn){border-bottom:none;padding:.75rem .1rem}.nav-actions{flex-direction:column;gap:.45rem;margin:.35rem 0 0;display:flex}.nav .btn,.nav-actions .btn{width:100%;margin-top:0}.compare-table,.blog-prose table{-webkit-overflow-scrolling:touch;display:block;overflow-x:auto}.blog-toc ol{columns:1}}@media (prefers-reduced-motion:reduce){.reveal,.reveal-delay-1,.reveal-delay-2{animation:none}}