:root{--fluid-ink:#10223e;--fluid-muted:#597089;--fluid-cream:#f6f8f4;--fluid-white:#fff;--fluid-blue:#2468ef;--fluid-violet:#7759e8;--fluid-aqua:#28d4c0;--fluid-coral:#ff8b7c;--fluid-line:rgba(32,73,120,.18);--fluid-deep:#142b53}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;min-height:100dvh;color:var(--fluid-ink);background:var(--fluid-cream);font-family:"Segoe UI","Microsoft YaHei UI","Microsoft YaHei",sans-serif;line-height:1.72;overflow-x:clip}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.fluid-shell{width:min(1200px,calc(100% - 48px));margin-inline:auto}
.current-header{position:sticky;top:0;z-index:50;background:rgba(246,248,244,.84);backdrop-filter:blur(18px)}
.current-nav{min-height:74px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:38px}
.current-brand{display:inline-flex;align-items:center;gap:10px;font-size:20px;font-weight:900;white-space:nowrap}.current-brand img{display:block;width:34px;height:34px;object-fit:contain}
.current-links{display:flex;justify-content:center;gap:clamp(20px,3vw,38px);color:var(--fluid-muted);font-size:14px;font-weight:700}.current-links a{transition:color .2s ease}.current-links a:hover{color:var(--fluid-blue)}
.flow-button{display:inline-flex;align-items:center;justify-content:center;min-width:166px;min-height:52px;padding:0 24px;border:1px solid var(--fluid-blue);border-radius:999px;color:#fff;background:var(--fluid-blue);font-weight:900;white-space:nowrap;word-break:keep-all;writing-mode:horizontal-tb;box-shadow:0 15px 34px rgba(36,104,239,.22);transition:transform .2s ease,background .2s ease}.flow-button:hover{background:var(--fluid-violet);border-color:var(--fluid-violet);transform:translateY(-2px)}.flow-button--small{min-width:126px;min-height:44px;padding-inline:18px}.flow-link{color:var(--fluid-blue);font-weight:800}
a:focus-visible,summary:focus-visible{outline:3px solid var(--fluid-coral);outline-offset:4px}
.embrace-hero{position:relative;min-height:calc(100dvh - 74px);overflow:hidden;background:#f6f8f4}.hero-canvas{position:relative;min-height:calc(100dvh - 74px)}
.hero-message{position:relative;z-index:8;width:min(730px,65%);padding-top:clamp(76px,10vw,138px)}.flow-label{margin:0 0 14px;color:var(--fluid-blue);font-size:11px;font-weight:900;letter-spacing:.17em}.hero-message h1,.continuity-heading h2,.device-copy h2,.protection-river h2,.coverage-copy h2,.scenario-ribbon h2,.guide-intro h2,.faq-pool h2,.callout-content h2{margin:0;font-family:"Arial Narrow","Microsoft YaHei UI",sans-serif;font-size:clamp(46px,7vw,94px);line-height:.97;letter-spacing:-.055em;text-wrap:balance}.hero-message>p:not(.flow-label){max-width:630px;margin:26px 0;color:var(--fluid-muted);font-size:clamp(17px,1.6vw,20px)}.hero-actions{display:flex;align-items:center;flex-wrap:wrap;gap:20px}
.hero-device{position:absolute;z-index:7;top:50%;right:8%;width:min(330px,29vw);height:auto;margin:0;padding:0;overflow:visible;transform:translateY(-46%);align-self:center}.hero-device img{display:block;width:100%;height:auto;min-height:0;max-height:none;margin:0;padding:0;object-fit:contain;object-position:center;clip-path:none;transform:none;filter:drop-shadow(0 34px 42px rgba(27,40,85,.26))}
.liquid-ribbon{position:absolute;z-index:1;pointer-events:none}.ribbon-one{top:-16%;right:-8%;width:58vw;height:94%;border-radius:42% 0 38% 60%/38% 0 65% 52%;background:linear-gradient(148deg,var(--fluid-aqua),#3e9df4 47%,var(--fluid-violet));transform:rotate(-7deg)}.ribbon-two{right:-18%;bottom:-25%;width:82vw;height:56%;border-radius:54% 0 0 48%/55% 0 0 45%;background:linear-gradient(104deg,rgba(255,139,124,.82),rgba(119,89,232,.88) 48%,rgba(36,104,239,.95));transform:rotate(7deg)}.ribbon-three{top:28%;right:15%;width:43vw;height:25%;border:1px solid rgba(255,255,255,.65);border-radius:50%;transform:rotate(-17deg);box-shadow:0 0 0 38px rgba(255,255,255,.07),0 0 0 76px rgba(255,255,255,.045)}
.hero-flow-note{position:absolute;z-index:9;min-width:158px;padding:11px 16px;border:1px solid rgba(255,255,255,.64);border-radius:999px;color:#fff;background:rgba(24,57,117,.26);backdrop-filter:blur(12px)}.hero-flow-note span,.hero-flow-note b{display:block}.hero-flow-note span{font-size:9px;letter-spacing:.12em}.hero-flow-note b{font-size:11px}.note-start{top:20%;right:1%}.note-middle{right:34%;bottom:24%}.note-end{right:4%;bottom:10%}
.hero-wave{position:absolute;z-index:10;right:-5%;bottom:-58px;left:-5%;height:120px;border-radius:50% 50% 0 0/100% 100% 0 0;background:#eef3ed}
.continuity-section{position:relative;padding:clamp(112px,14vw,180px) 0 160px;background:#eef3ed}.continuity-heading{display:grid;grid-template-columns:.4fr 1.05fr .55fr;gap:clamp(28px,5vw,70px);align-items:start}.continuity-heading h2{font-size:clamp(40px,5.6vw,74px)}.continuity-heading>p:last-child{margin:6px 0 0;color:var(--fluid-muted)}
.flow-course{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:30px;margin-top:100px;padding-top:90px}.course-line{position:absolute;top:0;right:4%;left:4%;height:100px;border-top:4px solid var(--fluid-blue);border-radius:50% 50% 0 0/100% 100% 0 0;transform:rotate(-2deg)}.course-line::after{content:"";position:absolute;top:-4px;right:0;width:25%;height:4px;background:var(--fluid-aqua)}.course-line i{position:absolute;top:-10px;width:16px;height:16px;border:4px solid var(--fluid-blue);border-radius:50%;background:#eef3ed}.course-line i:nth-child(1){left:0}.course-line i:nth-child(2){left:32%}.course-line i:nth-child(3){left:65%}.course-line i:nth-child(4){right:0;border-color:var(--fluid-aqua)}
.course-stop{padding-right:24px}.course-stop span{color:var(--fluid-blue);font-size:10px;font-weight:900;letter-spacing:.14em}.course-stop h3{margin:38px 0 10px;font-size:22px}.course-stop p{margin:0;color:var(--fluid-muted)}
.device-current{position:relative;padding:120px 0 110px;color:#f5faff;background:linear-gradient(110deg,#173b78 0,#2e5dd4 47%,#674fd4 100%)}.device-wave-top,.device-wave-bottom{position:absolute;right:-5%;left:-5%;height:120px;background:#eef3ed}.device-wave-top{top:-58px;border-radius:0 0 50% 50%/0 0 100% 100%}.device-wave-bottom{bottom:-58px;border-radius:50% 50% 0 0/100% 100% 0 0;background:#f7f4f9}
.device-flow{display:grid;grid-template-columns:.72fr 1.28fr;gap:clamp(40px,7vw,100px);align-items:center}.device-copy h2{font-size:clamp(40px,5vw,68px)}.device-copy .flow-label{color:#65f0d6}.device-copy>p:not(.flow-label){color:#c8d8ef}.flow-button--light{margin-top:16px;border-color:#fff;color:var(--fluid-blue);background:#fff;box-shadow:none}.device-panorama{align-self:center;height:auto;margin:0;padding:0;overflow:visible;transform:none}.device-panorama img{display:block;width:100%;height:auto;min-height:0;max-height:none;margin:0;padding:0;object-fit:contain;object-position:center;clip-path:none;transform:none;filter:drop-shadow(0 30px 40px rgba(4,20,60,.3))}
.platform-stream{grid-column:1/3;display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:34px;border-top:1px solid rgba(255,255,255,.28)}.platform-stream a{font-weight:800}.platform-stream i{flex:1;height:1px;background:rgba(255,255,255,.25)}
.protection-section{padding:clamp(130px,15vw,200px) 0 150px;background:#f7f4f9}.protection-river>header{display:grid;grid-template-columns:.45fr 1.55fr;gap:44px}.protection-river h2{max-width:15ch;font-size:clamp(40px,5.5vw,74px)}.protection-channel{display:grid;grid-template-columns:180px 1fr 180px;align-items:center;margin-top:80px}.channel-origin,.channel-destination{padding:22px;border:1px solid var(--fluid-line);border-radius:34px;background:#fff;text-align:center;box-shadow:0 15px 40px rgba(40,63,95,.08)}.channel-origin span,.channel-origin b,.channel-destination span,.channel-destination b{display:block}.channel-origin span,.channel-destination span{color:var(--fluid-muted);font-size:10px}.channel-origin b,.channel-destination b{font-size:15px}.channel-body{position:relative;height:80px;background:linear-gradient(90deg,var(--fluid-blue),var(--fluid-violet),var(--fluid-aqua));clip-path:polygon(0 36%,10% 19%,25% 30%,39% 10%,57% 28%,72% 15%,88% 31%,100% 22%,100% 76%,88% 64%,72% 82%,56% 67%,40% 88%,24% 70%,10% 82%,0 65%)}.channel-caption{position:absolute;z-index:2;top:50%;left:50%;color:#fff;font-size:10px;font-weight:900;letter-spacing:.12em;transform:translate(-50%,-50%);white-space:nowrap}.channel-body i{position:absolute;top:50%;width:7px;height:7px;border-radius:50%;background:#fff}.channel-body i:nth-of-type(1){left:20%}.channel-body i:nth-of-type(2){left:50%}.channel-body i:nth-of-type(3){right:20%}
.protection-notes{display:grid;grid-template-columns:repeat(3,1fr);gap:40px;margin-top:70px}.protection-notes p{margin:0;padding-top:20px;border-top:1px solid var(--fluid-line)}.protection-notes b,.protection-notes span{display:block}.protection-notes b{margin-bottom:7px}.protection-notes span{color:var(--fluid-muted)}
.coverage-bend{padding:clamp(100px,13vw,170px) 0;color:#effbf9;background:#123e54}.coverage-layout{display:grid;grid-template-columns:.78fr 1.22fr;gap:clamp(50px,8vw,110px);align-items:center}.coverage-copy .flow-label{color:#5ae4cb}.coverage-copy h2{font-size:clamp(40px,5vw,68px)}.coverage-copy>p:not(.flow-label){color:#b6ccd3}.coverage-copy .flow-link{color:#5ae4cb}
.region-ribbon{position:relative;min-height:520px}.region-track{position:absolute;display:flex;align-items:center;justify-content:space-between;padding:0 30px;border:1px solid rgba(255,255,255,.2);border-radius:50%;color:#dcecef;background:rgba(255,255,255,.04);transform:rotate(-12deg)}.track-a{inset:5% 2% 18%}.track-b{inset:17% 12% 8%;transform:rotate(8deg)}.track-c{inset:29% 22% 0;transform:rotate(-18deg)}.region-track span,.region-track b{font-size:11px}.region-track b{color:#5ae4cb}.region-core{position:absolute;z-index:3;top:50%;left:50%;display:grid;place-items:center;width:180px;aspect-ratio:1;border-radius:50%;color:#123e54;background:#5ae4cb;transform:translate(-50%,-50%);text-align:center}.region-core strong,.region-core small{display:block}.region-core strong{align-self:end;font-size:19px}.region-core small{align-self:start;max-width:12ch}
.scenario-flow{padding:clamp(100px,12vw,160px) 0;background:#f8f4ee}.scenario-ribbon>header{display:grid;grid-template-columns:.42fr 1.58fr;gap:50px;margin-bottom:70px}.scenario-ribbon h2{font-size:clamp(40px,5.4vw,72px);max-width:16ch}.scenario-bands{position:relative}.scenario-bands::before{content:"";position:absolute;top:50%;right:0;left:0;height:2px;background:linear-gradient(90deg,var(--fluid-blue),var(--fluid-coral),var(--fluid-violet))}.scenario-bands article{position:relative;display:grid;grid-template-columns:.42fr 1.58fr;gap:50px;align-items:center;min-height:150px;padding:26px 50px;border-radius:80px;background:rgba(255,255,255,.78);box-shadow:0 15px 42px rgba(37,59,88,.07)}.scenario-bands article+article{margin-top:18px}.scenario-bands article:nth-child(2){margin-left:7%;margin-right:3%}.scenario-bands article:nth-child(3){margin-left:14%}.scenario-bands article>span{color:var(--fluid-blue);font-size:11px;font-weight:900}.scenario-bands h3,.scenario-bands p{margin:0}.scenario-bands h3{font-size:22px}.scenario-bands p{color:var(--fluid-muted)}
.guide-flow{padding:clamp(100px,13vw,168px) 0;background:#efeaf8}.guide-intro{display:grid;grid-template-columns:.4fr 1fr .6fr;gap:40px;align-items:start;margin-bottom:76px}.guide-intro h2{font-size:clamp(40px,5.4vw,72px)}.guide-intro>p:last-child{margin:6px 0 0;color:var(--fluid-muted)}.guide-current{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.guide-current article{position:relative;min-height:330px;padding:34px 30px;border-radius:90px 34px 90px 34px;background:#fff}.guide-current article:nth-child(2){margin-top:60px}.guide-current article:nth-child(3){margin-top:120px}.guide-current span{color:var(--fluid-violet);font-size:10px;font-weight:900}.guide-current h3{margin:65px 0 10px;font-size:23px;line-height:1.35}.guide-current p{color:var(--fluid-muted)}.guide-current a{color:var(--fluid-blue);font-weight:800}
.fluid-faq{padding:clamp(100px,13vw,170px) 0;background:#f6f8f4}.faq-pool{display:grid;grid-template-columns:.72fr 1.28fr;gap:clamp(50px,8vw,110px)}.faq-pool header{align-self:start}.faq-pool h2{font-size:clamp(40px,5vw,68px)}.faq-stream{border-top:1px solid var(--fluid-line)}.faq-stream details{border-bottom:1px solid var(--fluid-line)}.faq-stream summary{position:relative;padding:25px 44px 25px 0;cursor:pointer;list-style:none;font-size:18px;font-weight:800}.faq-stream summary::-webkit-details-marker{display:none}.faq-stream summary::after{content:"~";position:absolute;right:10px;color:var(--fluid-violet);font-size:25px}.faq-stream p{margin:0 0 24px;color:var(--fluid-muted)}
.flow-callout{position:relative;padding:125px 0 90px;color:#fff;background:linear-gradient(100deg,var(--fluid-blue),var(--fluid-violet) 56%,var(--fluid-aqua))}.callout-wave{position:absolute;top:-60px;right:-5%;left:-5%;height:120px;border-radius:0 0 50% 50%/0 0 100% 100%;background:#f6f8f4}.callout-content{display:grid;grid-template-columns:1fr auto;gap:50px;align-items:end}.callout-content .flow-label{color:#8dffe7}.callout-content h2{max-width:17ch;font-size:clamp(40px,5.4vw,72px)}.flow-button--dark{border-color:#10223e;color:#fff;background:#10223e;box-shadow:none}
.current-footer{padding:54px 0 24px;color:#eff5fa;background:#0b1c31}.footer-flow{display:grid;grid-template-columns:1.4fr .6fr .6fr;gap:48px}.footer-flow h3{margin:0 0 12px;color:#61dfc8;font-size:13px}.footer-flow>div>a:not(.current-brand){display:block;margin:7px 0;color:#9db0c2}.footer-flow>div:first-child p{max-width:390px;color:#9db0c2}.current-copyright{grid-column:1/4;margin:20px 0 0;padding-top:18px;border-top:1px solid #2a4057;color:#71879a;font-size:11px}
@media(max-width:960px){.hero-message{width:67%}.hero-device{right:1%;width:31vw}.note-middle{right:28%}.continuity-heading,.guide-intro{grid-template-columns:.35fr 1fr}.continuity-heading>p:last-child,.guide-intro>p:last-child{grid-column:2}.device-flow,.coverage-layout,.faq-pool{grid-template-columns:1fr}.device-panorama{max-width:760px;margin-inline:auto}.platform-stream{grid-column:auto}.coverage-copy{max-width:680px}.region-ribbon{min-height:480px}.protection-river>header,.scenario-ribbon>header{grid-template-columns:.4fr 1.6fr}}
@media(max-width:680px){.fluid-shell{width:min(100% - 24px,1200px)}.current-nav{grid-template-columns:auto auto;gap:12px}.current-nav>.flow-button{display:none}.current-links{grid-column:1/3;grid-row:2;justify-content:flex-start;overflow-x:auto;padding:12px 0}.embrace-hero{min-height:850px}.hero-canvas{min-height:800px}.hero-message{width:100%;padding-top:55px}.hero-message h1{font-size:clamp(43px,13vw,62px)}.hero-actions{display:grid}.hero-actions .flow-button{width:100%}.ribbon-one{top:43%;right:-32%;width:135vw;height:62%;transform:rotate(-4deg)}.ribbon-two{right:-38%;bottom:-14%;width:145vw;height:40%}.ribbon-three{top:61%;right:-20%;width:100vw}.hero-device{top:auto;right:50%;bottom:56px;width:210px;transform:translateX(50%)}.hero-flow-note{min-width:132px;padding:8px 10px}.note-start{top:auto;right:0;bottom:300px}.note-middle{right:auto;bottom:210px;left:0}.note-end{right:0;bottom:95px}.continuity-heading,.guide-intro,.protection-river>header,.scenario-ribbon>header{grid-template-columns:1fr}.continuity-heading>p:last-child,.guide-intro>p:last-child{grid-column:auto}.flow-course{grid-template-columns:1fr;margin-top:70px;padding:0 0 0 32px}.course-line{top:0;bottom:0;left:5px;width:4px;height:auto;border-top:0;border-left:4px solid var(--fluid-blue);border-radius:0;transform:none}.course-line::after{top:auto;right:auto;bottom:0;left:-4px;width:4px;height:26%;background:var(--fluid-aqua)}.course-line i{top:auto;left:-10px!important}.course-line i:nth-child(1){top:0}.course-line i:nth-child(2){top:30%}.course-line i:nth-child(3){top:63%}.course-line i:nth-child(4){right:auto;bottom:0}.course-stop{padding:0 0 35px}.course-stop h3{margin:7px 0}.platform-stream{display:grid;grid-template-columns:1fr 1fr}.platform-stream i{display:none}.platform-stream a{padding:10px 0;border-bottom:1px solid rgba(255,255,255,.2)}.protection-channel{grid-template-columns:1fr}.channel-body{height:120px;transform:rotate(90deg);margin-block:-15px}.channel-caption{transform:translate(-50%,-50%) rotate(-90deg)}.protection-notes{grid-template-columns:1fr}.region-ribbon{min-height:390px}.region-track{padding:0 18px}.region-core{width:140px}.scenario-bands article,.scenario-bands article:nth-child(2),.scenario-bands article:nth-child(3){grid-template-columns:1fr;gap:8px;min-height:0;margin:14px 0;padding:30px;border-radius:42px}.scenario-bands::before{display:none}.guide-current{grid-template-columns:1fr}.guide-current article,.guide-current article:nth-child(2),.guide-current article:nth-child(3){min-height:0;margin:0;padding:30px;border-radius:46px 20px}.guide-current h3{margin:28px 0 10px}.callout-content{grid-template-columns:1fr}.callout-content .flow-button{width:100%}.footer-flow{grid-template-columns:1fr 1fr}.footer-flow>div:first-child{grid-column:1/3}.current-copyright{grid-column:1/3}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.current-links a,.flow-button{transition:none}}
.hero-canvas{align-items:center}.hero-device,.device-panorama{align-self:center;height:auto;padding:0;margin-top:0;margin-bottom:0;overflow:visible}.hero-device img,.device-panorama img{display:block;width:100%;height:auto;min-height:0;max-height:none;margin:0;padding:0;object-fit:contain;object-position:center;clip-path:none;transform:none}