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@media(max-width:980px){.nav nav{display:none}.hero-inner{grid-template-columns:1fr}.hero-copy{max-width:720px}.hero-visual{max-width:700px;width:100%;margin:auto}.browser-shell{right:0}.hero{padding-top:150px}.solution-stage{grid-template-columns:1fr 240px 1fr;gap:25px}.product-detail,.api-grid{grid-template-columns:1fr}.product-art{min-height:400px}.advantage-grid,.price-grid{grid-template-columns:1fr 1fr}.price-grid article.featured{transform:none}.side-tools{display:none}}
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@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.reveal{opacity:1;transform:none;transition:none}}

/* 统一字体比例：正文 16px，说明文字不低于 13px，界面示意文字不低于 9px。 */
body{font-size:16px;line-height:1.6}.nav nav a,.login{font-size:15px}.outline-btn{font-size:15px}.overline,.section-tag{font-size:12px;line-height:1.4}.hero h1{font-size:48px;line-height:1.28;letter-spacing:-1.6px}.hero-desc{font-size:17px;line-height:1.85}.primary-btn,.white-btn,.border-btn{font-size:15px}.hero-points{font-size:13px;line-height:1.55}.browser-top b{font-size:10px}.dash-title small{font-size:9px}.dash-title h3{font-size:18px}.dash-title button{font-size:9px}.stats small{font-size:9px}.stats b{font-size:16px}.stats em{font-size:9px}.table-head,.link-row{font-size:9px}.link-row b{font-size:10px}.link-row small{font-size:8px}.message-card b{font-size:10px}.message-card small,.message-card em{font-size:9px}.hero-bottom>span{font-size:11px}.hero-bottom b{font-size:15px}.hero-bottom small{font-size:11px}.center-heading h2{font-size:38px;line-height:1.25}.center-heading p{font-size:16px;line-height:1.8}.solution-list h3{font-size:18px}.solution-list p{font-size:14px;line-height:1.75}.solution-list article>span{font-size:10px}.phone-screen>small{font-size:11px}.phone-screen h3{font-size:15px}.phone-screen>b{font-size:22px}.phone-screen p{font-size:12px}.product-tabs button{font-size:14px}.small-tag{font-size:11px}.product-copy h3{font-size:30px;line-height:1.3}.product-copy p{font-size:15px;line-height:1.85}.product-copy ul{font-size:14px;line-height:1.6}.text-link{font-size:14px}.art-head{font-size:10px}.art-link span,.art-link b{font-size:10px}.art-link em{font-size:9px}.art-fields small,.art-actions button,.art-actions span{font-size:9px}.art-fields b{font-size:10px}.api-copy h2{font-size:40px}.api-copy>p{font-size:15px;line-height:1.85}.api-doc{font-size:13px}.api-features b{font-size:15px}.api-features small{font-size:11px}.code-tabs button,.code-tabs span{font-size:10px}.code-panel pre{font-size:12px;line-height:1.85}.advantage-grid h3{font-size:18px}.advantage-grid p{font-size:14px;line-height:1.75}.price-grid article>small{font-size:10px}.price-grid h3{font-size:20px}.price span,.price em{font-size:10px}.price-grid ul{font-size:13px;line-height:1.55}.price-grid article>a{font-size:13px}.popular{font-size:9px}.step-row article>span{font-size:10px}.step-row h3{font-size:15px}.fact-grid span{font-size:13px}.closing p{font-size:15px}.footer-grid>div:first-child p{font-size:13px;line-height:1.8}.footer-grid h4{font-size:13px}.footer-grid a{font-size:12px}.copyright{font-size:11px}
@media(max-width:700px){.hero h1{font-size:35px;line-height:1.32;letter-spacing:-1px}.hero-desc{font-size:16px}.hero-points{font-size:12px}.center-heading h2{font-size:30px}.center-heading p{font-size:15px}.solution-list h3{font-size:17px}.solution-list p{font-size:14px}.product-copy h3{font-size:26px}.api-copy h2{font-size:32px}.code-panel pre{font-size:11px}.closing h2{font-size:29px;line-height:1.35}}

/* 重要内容使用更强的视觉层级，辅助标签和单位保持克制。 */
.hero h1{font-size:54px;font-weight:800}.center-heading h2{font-size:46px;font-weight:800;letter-spacing:-1.5px}.center-heading p{font-size:17px}.product-copy h3{font-size:34px;font-weight:800}.api-copy h2{font-size:44px;font-weight:800}.advantage-grid h3{font-size:21px}.fact-grid b{font-size:48px}.closing h2{font-size:40px;font-weight:800}
.price-grid{gap:16px;margin-top:58px}.price-grid article{min-height:500px;padding:35px 31px}.price-grid article>small{font-size:11px;letter-spacing:1.4px}.price-grid h3{font-size:28px;font-weight:800;margin:15px 0 31px}.price{padding-bottom:28px}.price b{font-size:54px;line-height:1;font-weight:800;letter-spacing:-2px}.price span,.price em{font-size:12px}.price-grid ul{font-size:16px;gap:19px;padding:27px 0}.price-grid article>a{height:52px;font-size:16px}.popular{font-size:11px;padding:6px 10px}.pricing .center-heading{max-width:840px}
@media(max-width:980px){.center-heading h2{font-size:42px}.price-grid article{min-height:470px}}
@media(max-width:700px){.hero h1{font-size:38px}.center-heading h2{font-size:34px}.product-copy h3{font-size:29px}.api-copy h2{font-size:35px}.closing h2{font-size:31px}.price-grid article{min-height:430px;padding:30px 25px}.price-grid h3{font-size:26px}.price b{font-size:48px}.price-grid ul{font-size:15px}.fact-grid b{font-size:40px}}

/* 动效系统：轻量、错峰、以内容进入和产品状态为主。 */
.header{position:fixed;transition:background .35s ease,box-shadow .35s ease,backdrop-filter .35s ease}.header.scrolled{background:rgba(8,20,38,.92);box-shadow:0 10px 35px rgba(0,0,0,.2);backdrop-filter:blur(14px)}.nav nav a{position:relative}.nav nav a:after{content:"";position:absolute;height:2px;left:50%;right:50%;bottom:-10px;background:#55dff0;transition:left .25s ease,right .25s ease}.nav nav a:hover:after{left:0;right:0}.dot-field{animation:dotsDrift 18s linear infinite}.hero-copy.visible{animation:heroCopyIn .85s cubic-bezier(.2,.75,.25,1) both}.hero-visual.visible{animation:heroVisualIn 1s cubic-bezier(.2,.75,.25,1) .12s both}.browser-shell{animation:panelFloat 6s ease-in-out infinite}.browser-shell:after{content:"";position:absolute;inset:-60% auto -60% -35%;width:22%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);transform:rotate(18deg);animation:panelShine 8s ease-in-out infinite;pointer-events:none}.message-card{animation:cardFloat 4.8s ease-in-out infinite}.msg-b{animation-delay:-1.6s}.msg-c{animation-delay:-3.1s}.arrow-a{animation:arrowFlyA 3.8s ease-in-out infinite}.arrow-b{animation:arrowFlyB 4.4s ease-in-out infinite}.primary-btn{position:relative;overflow:hidden}.primary-btn:after{content:"";position:absolute;inset:0;transform:translateX(-120%);background:linear-gradient(100deg,transparent,rgba(255,255,255,.22),transparent);transition:transform .55s ease}.primary-btn:hover:after{transform:translateX(120%)}.phone{animation:phoneFloat 6s ease-in-out infinite}.solution-stage.visible .phone-chart i{transform-origin:bottom;animation:barRise .7s ease-out both}.solution-stage.visible .phone-chart i:nth-child(2){animation-delay:.08s}.solution-stage.visible .phone-chart i:nth-child(3){animation-delay:.16s}.solution-stage.visible .phone-chart i:nth-child(4){animation-delay:.24s}.solution-stage.visible .phone-chart i:nth-child(5){animation-delay:.32s}.solution-stage.visible .phone-chart i:nth-child(6){animation-delay:.4s}.product-detail.product-change{animation:productSwap .42s ease both}.product-tabs button span{transition:transform .25s ease}.product-tabs button:hover span,.product-tabs button.active span{transform:translateY(-3px) scale(1.08)}.product-art{position:relative;overflow:hidden}.product-art:before{content:"";position:absolute;width:320px;height:320px;border-radius:50%;background:rgba(8,118,249,.25);filter:blur(70px);animation:orbPulse 5s ease-in-out infinite}.art-window{position:relative;z-index:1;transition:transform .3s ease}.product-detail:hover .art-window{transform:translateY(-5px)}.advantage-grid article>span{transition:transform .3s ease,background .3s ease,color .3s ease}.advantage-grid article:hover>span{transform:translateY(-5px) rotate(-4deg);background:#0876f9;color:#fff}.price-grid article{transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease}.price-grid article:hover{transform:translateY(-7px);box-shadow:0 24px 60px rgba(8,47,96,.14);border-color:#b9d6fa}.price-grid article.featured{animation:featuredGlow 4s ease-in-out infinite}.price-grid article.featured:hover{transform:translateY(-13px)}.step-row article i{transition:transform .3s ease,background .3s ease,color .3s ease}.step-row article:hover i{transform:translateY(-6px) scale(1.05);background:#0876f9;color:#fff}.fact-grid div{transition:transform .25s ease}.fact-grid div:hover{transform:translateY(-4px)}
@keyframes heroCopyIn{from{opacity:0;transform:translateY(28px)}to{opacity:1;transform:none}}@keyframes heroVisualIn{from{opacity:0;transform:translateX(35px)}to{opacity:1;transform:none}}@keyframes dotsDrift{to{background-position:66px 33px}}@keyframes panelFloat{0%,100%{transform:perspective(1000px) rotateY(-4deg) translateY(0)}50%{transform:perspective(1000px) rotateY(-4deg) translateY(-9px)}}@keyframes panelShine{0%,35%{left:-35%}60%,100%{left:125%}}@keyframes cardFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}@keyframes arrowFlyA{0%,100%{transform:translate(0,0) rotate(15deg);opacity:.65}50%{transform:translate(13px,-9px) rotate(10deg);opacity:1}}@keyframes arrowFlyB{0%,100%{transform:translate(0,0) rotate(-15deg);opacity:.55}50%{transform:translate(-11px,9px) rotate(-9deg);opacity:1}}@keyframes phoneFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}@keyframes barRise{from{transform:scaleY(.08);opacity:.25}to{transform:scaleY(1);opacity:1}}@keyframes productSwap{from{opacity:.5;transform:translateY(8px)}to{opacity:1;transform:none}}@keyframes orbPulse{0%,100%{transform:scale(.85);opacity:.5}50%{transform:scale(1.15);opacity:.85}}@keyframes featuredGlow{0%,100%{box-shadow:0 22px 55px rgba(8,25,48,.2)}50%{box-shadow:0 28px 75px rgba(8,118,249,.28)}}
@media(prefers-reduced-motion:reduce){.dot-field,.hero-copy.visible,.hero-visual.visible,.browser-shell,.browser-shell:after,.message-card,.arrow-a,.arrow-b,.phone,.solution-stage.visible .phone-chart i,.product-detail.product-change,.product-art:before,.price-grid article.featured{animation:none!important}.reveal{opacity:1;transform:none}}

/* 六项核心解决方案属于重点内容，使用更大的阅读字号。 */
.solution-stage{gap:72px}.solution-list{gap:40px}.solution-list article{gap:18px;align-items:flex-start}.solution-list article>span{width:40px;height:40px;border-radius:10px;font-size:12px}.solution-list h3{font-size:24px;line-height:1.3;font-weight:800;margin:1px 0 12px}.solution-list p{font-size:17px;line-height:1.85;color:#718096}.phone-screen h3{font-size:18px}.phone-screen>b{font-size:26px}.phone-screen p{font-size:14px}.phone-screen p b{font-size:19px}
@media(max-width:980px){.solution-stage{gap:32px}.solution-list{gap:30px}.solution-list h3{font-size:21px}.solution-list p{font-size:15px}}
@media(max-width:700px){.solution-list{gap:27px}.solution-list article>span{width:38px;height:38px}.solution-list h3{font-size:21px}.solution-list p{font-size:16px}}

/* 四步流程是核心操作路径，整体放大并增强节奏。 */
.steps .center-heading p{font-size:18px}.step-row{margin-top:72px}.step-row article>span{top:-12px;left:calc(50% + 40px);font-size:13px;font-weight:800}.step-row article i{width:112px;height:112px;font-size:36px;border-width:2px}.step-row h3{font-size:22px;font-weight:800;margin-top:26px}.step-row>b{font-size:26px;color:#9fb1c5}.center-action{margin-top:58px}
@media(max-width:980px){.step-row article i{width:96px;height:96px;font-size:31px}.step-row h3{font-size:19px}.step-row>b{font-size:22px}}
@media(max-width:700px){.steps .center-heading p{font-size:16px}.step-row{margin-top:50px;gap:38px 20px}.step-row article i{width:88px;height:88px;font-size:28px}.step-row article>span{left:calc(50% + 28px);font-size:11px}.step-row h3{font-size:18px;margin-top:18px}}

/* 首屏标题略微收紧，避免在常用桌面宽度下过早换行。 */
.hero h1{font-size:50px;line-height:1.3}
@media(max-width:700px){.hero h1{font-size:36px}}

/* Telegram 客服：纯静态对话入口，最终通过 t.me 进入官方客服会话。 */
.telegram-support{position:fixed;z-index:120;right:24px;bottom:24px;font-size:14px}.telegram-trigger{position:relative;height:52px;padding:0 19px 0 15px;border:0;border-radius:28px;background:linear-gradient(135deg,#229ed9,#0876f9);color:#fff;display:flex;align-items:center;gap:9px;font-weight:800;box-shadow:0 15px 35px rgba(8,118,249,.3);cursor:pointer;transition:transform .25s ease,box-shadow .25s ease}.telegram-trigger:hover{transform:translateY(-3px);box-shadow:0 19px 42px rgba(8,118,249,.38)}.telegram-trigger svg{width:24px;height:24px;fill:#fff}.telegram-unread{position:absolute;right:-2px;top:-5px;width:19px;height:19px;border-radius:50%;display:grid;place-items:center;background:#ff4d5e;color:#fff;border:2px solid #fff;font-size:10px;line-height:1}.telegram-dialog{position:absolute;right:0;bottom:66px;width:350px;background:#fff;border:1px solid #dce8f4;border-radius:16px;overflow:hidden;box-shadow:0 24px 70px rgba(8,30,61,.24);opacity:0;visibility:hidden;pointer-events:none;transform:translateY(14px) scale(.97);transform-origin:right bottom;transition:opacity .23s ease,transform .23s ease,visibility .23s}.telegram-support.open .telegram-dialog{opacity:1;visibility:visible;pointer-events:auto;transform:none}.telegram-dialog-head{height:76px;padding:0 17px;background:linear-gradient(135deg,#168dcc,#0876f9);color:#fff;display:flex;align-items:center;gap:12px}.telegram-avatar{width:43px;height:43px;border-radius:50%;display:grid;place-items:center;background:#fff;box-shadow:0 6px 15px rgba(0,44,99,.18)}.telegram-avatar svg{width:24px;height:24px;fill:#229ed9}.telegram-agent{display:grid;gap:3px}.telegram-agent b{font-size:15px}.telegram-agent small{display:flex;align-items:center;gap:6px;color:#e8f8ff;font-size:11px}.telegram-agent small i{width:7px;height:7px;border-radius:50%;background:#71f2a8;box-shadow:0 0 0 3px rgba(113,242,168,.18)}.telegram-close{margin-left:auto;width:32px;height:32px;border:0;border-radius:50%;background:rgba(255,255,255,.12);color:#fff;font-size:24px;line-height:1;cursor:pointer}.telegram-close:hover{background:rgba(255,255,255,.23)}.telegram-dialog-body{padding:22px 18px 17px;background:#f4f8fc}.telegram-message{position:relative;margin-right:24px;padding:14px 15px 12px;background:#fff;border-radius:4px 14px 14px 14px;box-shadow:0 7px 20px rgba(17,57,96,.08)}.telegram-message p{margin:0;color:#33445a;font-size:13px;line-height:1.75}.telegram-message time{display:block;margin-top:8px;color:#91a0b1;font-size:10px}.telegram-account{margin-top:15px;padding:11px 13px;border:1px solid #deebf6;border-radius:10px;background:rgba(255,255,255,.75);display:flex;justify-content:space-between;align-items:center;color:#7a8b9e;font-size:11px}.telegram-account b{color:#0876f9;font-size:13px}.telegram-start{height:51px;margin:15px 18px 18px;border-radius:9px;background:#229ed9;color:#fff;display:flex;align-items:center;justify-content:center;gap:9px;font-weight:800;transition:background .2s ease,transform .2s ease}.telegram-start:hover{background:#168dcc;transform:translateY(-1px)}.telegram-start svg{width:20px;height:20px;fill:#fff}.telegram-trigger:focus-visible,.telegram-close:focus-visible,.telegram-start:focus-visible{outline:3px solid rgba(105,231,242,.65);outline-offset:3px}
@media(max-width:980px){.telegram-support{right:18px;bottom:18px}}
@media(max-width:700px){.telegram-support{right:14px;bottom:14px}.telegram-trigger{width:49px;height:49px;padding:0;justify-content:center}.telegram-trigger>span:last-child{display:none}.telegram-trigger svg{width:23px;height:23px}.telegram-dialog{position:fixed;left:14px;right:14px;bottom:75px;width:auto}.telegram-dialog-head{height:70px}.telegram-message{margin-right:8px}}
@media(prefers-reduced-motion:reduce){.telegram-trigger,.telegram-dialog,.telegram-start{transition:none}}