:root{--brand:#2aabee;--brand2:#1e8fd1;--dark:#17212b;--dark2:#0e1621;--bg:#f4f7fa;--txt:#232a33;--mut:#6c7a89;--line:#e3e9ef;--gold:#f2c744;--sh:0 8px 28px rgba(23,33,43,.08)}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",sans-serif;color:var(--txt);background:var(--bg);line-height:1.7;overflow-x:hidden}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
ul,ol{list-style:none}
button{font:inherit;border:0;background:none;cursor:pointer}
[id]{scroll-margin-top:92px}
.w{width:min(1200px,92%);margin:0 auto}
.nav{position:fixed;top:0;left:0;right:0;z-index:100;transition:.3s}
.nav.scrolled{background:rgba(14,22,33,.9);backdrop-filter:blur(12px);box-shadow:0 4px 20px rgba(0,0,0,.18)}
.nav-in{display:flex;align-items:center;gap:20px;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:#fff;flex:none}
.brand img{width:34px;height:34px;border-radius:9px}
.menu{display:flex;align-items:center;gap:4px;margin:0 auto}
.mi{color:#e8f1f8;padding:8px 14px;border-radius:10px;font-size:15px;font-weight:600;transition:.2s;white-space:nowrap}
.mi:hover,.mi.on{background:rgba(255,255,255,.12);color:#fff}
.mg{position:relative}
.mt{display:flex;align-items:center;gap:6px;color:#e8f1f8;padding:8px 14px;border-radius:10px;font-size:15px;font-weight:600;transition:.2s;white-space:nowrap}
.mg:hover .mt{background:rgba(255,255,255,.12);color:#fff}
.ar{font-size:11px;transition:.25s;display:inline-block}
.mg:hover .ar{transform:rotate(180deg)}
.dd{position:absolute;top:calc(100% + 10px);left:50%;transform:translateX(-50%) translateY(8px);background:#fff;border-radius:12px;box-shadow:0 12px 36px rgba(23,33,43,.18);padding:8px;min-width:196px;opacity:0;visibility:hidden;transition:.25s;z-index:50}
.mg:hover .dd{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.dd a{display:block;padding:9px 14px;border-radius:8px;color:var(--txt);font-size:14px;transition:.2s;white-space:nowrap}
.dd a:hover{background:#eef6fc;color:var(--brand)}
.nav-r{display:flex;align-items:center;gap:12px;flex:none}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:12px;font-weight:700;padding:12px 26px;font-size:15px;transition:.25s;border:2px solid transparent}
.btn-grad{background:linear-gradient(135deg,#2aabee,#1e8fd1);color:#fff;box-shadow:0 8px 22px rgba(42,171,238,.35)}
.btn-grad:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(42,171,238,.48)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-white{background:#fff;color:var(--brand)}
.btn-white:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(0,0,0,.22)}
.btn-sm{padding:9px 20px;font-size:14px;border-radius:10px}
.burger{display:none;flex-direction:column;gap:5px;padding:8px}
.burger span{width:24px;height:2.5px;background:#fff;border-radius:2px;transition:.3s}
.burger.on span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}
.burger.on span:nth-child(2){opacity:0}
.burger.on span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}
.hero{position:relative;background:linear-gradient(160deg,#0e1621 0%,#17212b 52%,#1d3a55 100%);color:#fff;padding:152px 0 92px;overflow:hidden}
.hero::before{content:"";position:absolute;width:520px;height:520px;border-radius:50%;background:radial-gradient(circle,rgba(42,171,238,.22),transparent 65%);top:-160px;right:-120px}
.hero::after{content:"";position:absolute;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(242,199,68,.1),transparent 60%);bottom:-180px;left:-100px}
.hero-g{display:grid;grid-template-columns:1.04fr .96fr;gap:54px;align-items:center;position:relative;z-index:2}
.eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(42,171,238,.15);border:1px solid rgba(42,171,238,.42);color:#7fd2f7;padding:6px 16px;border-radius:999px;font-size:13px;font-weight:600}
.hero h1{font-size:46px;line-height:1.27;margin:18px 0 16px;font-weight:800}
.hero h1 .grad{background:linear-gradient(90deg,#6fd0ff,#2aabee);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{color:#b9c7d4;font-size:17px;max-width:560px;margin-bottom:28px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:38px;margin-top:42px;flex-wrap:wrap}
.hs b{font-size:31px;font-weight:800;color:#fff;display:block;line-height:1.2}
.hs b i{font-style:normal;color:#2aabee}
.hs span{font-size:13px;color:#8fa1b2}
.demo{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.13);border-radius:20px;backdrop-filter:blur(8px);overflow:hidden;box-shadow:0 24px 64px rgba(0,0,0,.45)}
.chat{display:grid;grid-template-columns:196px 1fr;height:452px}
.chat-side{background:#0e1621;border-right:1px solid rgba(255,255,255,.08);padding:14px 10px;overflow-y:auto}
.chat-side h5{color:#7fa4c4;font-size:12px;margin:4px 10px 8px;letter-spacing:1px;font-weight:700}
.ct{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:10px;cursor:pointer;transition:.2s;color:#d9e6f2;text-align:left;width:100%}
.ct:hover{background:rgba(255,255,255,.08)}
.ct.on{background:rgba(42,171,238,.25)}
.ct .av{width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:14px;color:#fff;flex:none}
.ct .tx{min-width:0}
.ct b{font-size:13px;font-weight:600;display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ct p{font-size:11px;color:#7fa4c4;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chat-main{display:flex;flex-direction:column;background:#17212b;min-width:0}
.chat-top{display:flex;align-items:center;gap:10px;padding:12px 16px;border-bottom:1px solid rgba(255,255,255,.08)}
.chat-top .av{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:13px;color:#fff;flex:none}
.chat-top b{color:#fff;font-size:14px}
.chat-top span{font-size:12px;color:#6fc3f0;display:block}
.chat-msgs{flex:1;overflow-y:auto;padding:18px 16px;display:flex;flex-direction:column;gap:10px}
.pin{background:rgba(42,171,238,.12);border:1px solid rgba(42,171,238,.3);color:#9fd9f8;font-size:12px;border-radius:10px;padding:8px 12px;text-align:center}
.msg{max-width:80%;padding:10px 14px;border-radius:14px;font-size:13.5px;line-height:1.55;animation:pop .3s both}
.msg-in{background:#182533;color:#e6eef6;border-bottom-left-radius:4px;align-self:flex-start}
.msg-out{background:#2aabee;color:#fff;border-bottom-right-radius:4px;align-self:flex-end}
.msg .tm{display:block;font-size:10px;opacity:.6;margin-top:3px;text-align:right}
@keyframes pop{from{transform:translateY(6px);opacity:0}to{transform:none;opacity:1}}
.chat-input{display:flex;gap:8px;padding:12px;border-top:1px solid rgba(255,255,255,.08)}
.chat-input input{flex:1;min-width:0;background:#0e1621;border:1px solid rgba(255,255,255,.14);border-radius:10px;color:#fff;padding:10px 14px;font-size:14px;outline:none;transition:.2s}
.chat-input input:focus{border-color:var(--brand)}
.chat-input button{background:linear-gradient(135deg,#2aabee,#1e8fd1);border-radius:10px;width:42px;height:42px;display:flex;align-items:center;justify-content:center;color:#fff;flex:none;transition:.2s}
.chat-input button:hover{transform:scale(1.06)}
.sec{padding:88px 0}
.sec-alt{background:#fff}
.sec-head{text-align:center;max-width:760px;margin:0 auto 52px}
.tag{display:inline-block;color:var(--brand);background:#e8f5fc;padding:5px 16px;border-radius:999px;font-size:13px;font-weight:700;margin-bottom:14px}
.sec-head h2{font-size:34px;font-weight:800;color:var(--dark);margin-bottom:12px;line-height:1.3}
.sec-head p{color:var(--mut);font-size:16px}
.features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.fc{background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px 22px;transition:.3s;position:relative;overflow:hidden}
.fc:hover{transform:translateY(-6px);box-shadow:0 16px 40px rgba(23,33,43,.1);border-color:#c9e7f8}
.fc .ic{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;margin-bottom:16px;background:linear-gradient(135deg,#e3f4fd,#cfe9f8);color:var(--brand)}
.fc .ic svg{width:26px;height:26px}
.fc h3{font-size:17px;margin-bottom:8px;color:var(--dark)}
.fc p{font-size:13.5px;color:var(--mut)}
.sync-g{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.sync-c{background:#f7fafc;border:1px solid var(--line);border-radius:16px;padding:30px 26px;text-align:center;transition:.3s}
.sync-c:hover{transform:translateY(-6px);box-shadow:var(--sh)}
.sync-c .ic{width:64px;height:64px;margin:0 auto 16px;border-radius:18px;background:linear-gradient(135deg,#2aabee,#1e8fd1);color:#fff;display:flex;align-items:center;justify-content:center}
.sync-c .ic svg{width:32px;height:32px}
.sync-c h3{font-size:18px;color:var(--dark);margin-bottom:8px}
.sync-c p{font-size:13.5px;color:var(--mut)}
.sync-c .arrow{color:var(--brand);font-size:20px;margin-top:10px}
.band{background:linear-gradient(135deg,#17212b,#1d3a55);border-radius:22px;color:#fff;padding:52px;display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center;position:relative;overflow:hidden}
.band::before{content:"";position:absolute;width:380px;height:380px;border-radius:50%;background:radial-gradient(circle,rgba(42,171,238,.2),transparent 65%);top:-140px;right:-100px}
.band h2{font-size:30px;font-weight:800;margin-bottom:12px;line-height:1.3}
.band h2 em{font-style:normal;color:#2aabee}
.band .bd-p{color:#9fb3c6;font-size:15px;max-width:520px;margin-bottom:20px}
.band ul{margin-bottom:20px}
.band li{font-size:14.5px;color:#c3d2de;padding:6px 0 6px 26px;position:relative}
.band li::before{content:"✓";position:absolute;left:0;color:#2aabee;font-weight:800}
.band-nums{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.bn{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:16px;padding:22px;transition:.3s}
.bn:hover{background:rgba(255,255,255,.1)}
.bn b{font-size:32px;font-weight:800;color:#2aabee;display:block;line-height:1.2}
.bn span{font-size:13px;color:#9fb3c6}
.sc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.sc{background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px 24px;transition:.3s;position:relative}
.sc:hover{transform:translateY(-6px);box-shadow:0 16px 40px rgba(23,33,43,.1)}
.sc .ic{width:48px;height:48px;border-radius:13px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#e3f4fd,#cfe9f8);color:var(--brand);margin-bottom:14px}
.sc .ic svg{width:24px;height:24px}
.sc h3{font-size:16.5px;color:var(--dark);margin-bottom:8px}
.sc p{font-size:13.5px;color:var(--mut)}
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch}
.pc{background:#fff;border:1px solid var(--line);border-radius:18px;padding:34px 28px;display:flex;flex-direction:column;position:relative;transition:.3s}
.pc:hover{transform:translateY(-6px);box-shadow:var(--sh)}
.pc.hot{border:2px solid var(--brand);background:linear-gradient(180deg,#fff,#f2faff);box-shadow:0 18px 46px rgba(42,171,238,.18)}
.pc .flag{position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:linear-gradient(135deg,#2aabee,#1e8fd1);color:#fff;font-size:12px;font-weight:700;padding:5px 18px;border-radius:999px;white-space:nowrap}
.pc h3{font-size:19px;color:var(--dark);margin-bottom:6px}
.pc .pd{font-size:13px;color:var(--mut);margin-bottom:16px}
.pc .pr{font-size:40px;font-weight:800;color:var(--dark)}
.pc .pr span{font-size:14px;color:var(--mut);font-weight:400}
.pc ul{margin:20px 0 26px;flex:1}
.pc li{padding:8px 0 8px 24px;position:relative;font-size:14px;color:#46525f;border-bottom:1px dashed var(--line)}
.pc li:last-child{border-bottom:0}
.pc li::before{content:"✓";position:absolute;left:2px;color:var(--brand);font-weight:800}
.pc .btn{width:100%}
.pc .btn-line{background:#fff;color:var(--brand);border-color:var(--brand)}
.pc .btn-line:hover{background:#eef6fc}
.faq{max-width:840px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:14px;overflow:hidden;transition:.3s}
.faq-item.on{border-color:#c9e7f8;box-shadow:var(--sh)}
.faq-q{display:flex;justify-content:space-between;align-items:center;gap:14px;padding:18px 22px;cursor:pointer;font-weight:700;color:var(--dark);font-size:16px;text-align:left;width:100%}
.faq-q .pl{transition:.3s;color:var(--brand);font-size:20px;flex:none}
.faq-item.on .pl{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease}
.faq-a-in{padding:0 22px 20px;color:#46525f;font-size:14.5px}
.faq-a-in ol{margin:10px 0 0 20px;list-style:decimal}
.faq-a-in li{margin-bottom:7px}
.ts-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.tsc{background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px}
.tsc .stars{color:#f2c744;letter-spacing:3px;font-size:15px}
.tsc>p{font-size:14.5px;color:#46525f;margin:12px 0 18px}
.tsc .who{display:flex;align-items:center;gap:12px}
.tsc .av{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,#2aabee,#1e8fd1);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;flex:none}
.tsc b{font-size:14.5px;display:block;color:var(--dark)}
.tsc span{font-size:12px;color:var(--mut)}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.nc{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;transition:.3s;display:flex;flex-direction:column}
.nc:hover{transform:translateY(-6px);box-shadow:0 16px 40px rgba(23,33,43,.12)}
.nc .th{position:relative;aspect-ratio:16/9;overflow:hidden}
.nc .th img{width:100%;height:100%;object-fit:cover;transition:.5s}
.nc:hover .th img{transform:scale(1.08)}
.nc .tagp{position:absolute;top:12px;left:12px;background:rgba(23,33,43,.8);color:#fff;font-size:12px;padding:4px 12px;border-radius:999px}
.nc .bd{padding:18px 20px;display:flex;flex-direction:column;flex:1}
.nc h3{font-size:16px;line-height:1.5;margin-bottom:8px;color:var(--dark);transition:.2s}
.nc:hover h3{color:var(--brand)}
.nc .ex{font-size:13px;color:var(--mut);flex:1;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.nc .meta{display:flex;justify-content:space-between;font-size:12px;color:#9aa8b6;margin-top:12px;padding-top:12px;border-top:1px solid var(--line)}
.cta{background:linear-gradient(135deg,#2aabee,#1e8fd1);border-radius:22px;padding:56px 40px;text-align:center;color:#fff;position:relative;overflow:hidden}
.cta::before{content:"";position:absolute;width:340px;height:340px;border-radius:50%;background:rgba(255,255,255,.12);top:-160px;left:-100px}
.cta::after{content:"";position:absolute;width:280px;height:280px;border-radius:50%;background:rgba(255,255,255,.1);bottom:-140px;right:-80px}
.cta h2{font-size:32px;margin-bottom:12px;position:relative;z-index:2}
.cta p{opacity:.92;margin-bottom:28px;position:relative;z-index:2}
.cta .btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;position:relative;z-index:2}
.footer{background:#0e1621;color:#9fb3c6;padding:60px 0 0}
.ft-in{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.08)}
.ft-brand img{width:42px;height:42px;border-radius:11px;margin-bottom:12px}
.ft-brand p{font-size:13.5px;max-width:290px}
.ft-col h4{color:#fff;font-size:15px;margin-bottom:14px}
.ft-col a{display:block;font-size:13.5px;padding:5px 0;transition:.2s}
.ft-col a:hover{color:#2aabee}
.ft-copy{text-align:center;padding:18px 0;font-size:12.5px;color:#6b7c8d}
.top{position:fixed;right:22px;bottom:28px;width:44px;height:44px;border-radius:12px;background:var(--brand);color:#fff;font-size:18px;display:none;align-items:center;justify-content:center;box-shadow:0 10px 26px rgba(42,171,238,.4);z-index:99;transition:.2s}
.top.show{display:flex}
.top:hover{transform:translateY(-3px)}
.page-hero{background:linear-gradient(160deg,#0e1621,#1d3a55);color:#fff;padding:148px 0 68px;text-align:center;position:relative;overflow:hidden}
.page-hero::before{content:"";position:absolute;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(42,171,238,.2),transparent 65%);top:-160px;right:-100px}
.page-hero h1{font-size:38px;font-weight:800;position:relative;z-index:2}
.page-hero p{color:#9fb3c6;margin-top:12px;position:relative;z-index:2;font-size:16px}
.crumb{display:flex;gap:8px;font-size:13px;color:#9fb3c6;justify-content:center;margin-bottom:16px;flex-wrap:wrap;position:relative;z-index:2}
.crumb a:hover{color:#fff}
.crumb i{font-style:normal;opacity:.6}
.dl-hero{background:linear-gradient(160deg,#0e1621 0%,#17212b 52%,#1d3a55 100%);color:#fff;padding:152px 0 80px;overflow:hidden;position:relative}
.dl-hero::before{content:"";position:absolute;width:480px;height:480px;border-radius:50%;background:radial-gradient(circle,rgba(42,171,238,.2),transparent 65%);top:-150px;right:-110px}
.dl-hero-g{display:grid;grid-template-columns:1fr 1fr;gap:54px;align-items:center;position:relative;z-index:2}
.dl-hero h1{font-size:40px;line-height:1.3;margin:16px 0 14px;font-weight:800}
.dl-hero h1 .grad{background:linear-gradient(90deg,#6fd0ff,#2aabee);-webkit-background-clip:text;background-clip:text;color:transparent}
.dl-hero .sub{color:#b9c7d4;font-size:16px;margin-bottom:26px;max-width:520px}
.dl-data{display:flex;gap:32px;margin-top:34px;flex-wrap:wrap}
.dl-data b{font-size:26px;color:#fff;display:block}
.dl-data b i{font-style:normal;color:#2aabee}
.dl-data span{font-size:12.5px;color:#8fa1b2}
.ver-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.vc{background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px;transition:.3s;display:flex;flex-direction:column}
.vc:hover{transform:translateY(-6px);box-shadow:var(--sh)}
.vc .vtop{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:14px}
.vc h3{font-size:18px;color:var(--dark)}
.vc .vtag{background:#e8f5fc;color:var(--brand);font-size:12px;font-weight:700;padding:4px 12px;border-radius:999px;white-space:nowrap}
.vc .vinfo{display:flex;gap:18px;font-size:13px;color:var(--mut);margin-bottom:14px;flex-wrap:wrap}
.vc ul{flex:1;margin-bottom:20px}
.vc li{font-size:13.5px;color:#46525f;padding:5px 0 5px 24px;position:relative}
.vc li::before{content:"✓";position:absolute;left:2px;color:var(--brand);font-weight:800}
.vc .btn{width:100%}
.req-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.req{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;transition:.3s}
.req:hover{border-color:#c9e7f8;box-shadow:var(--sh)}
.req b{display:block;color:var(--brand);font-size:15px;margin-bottom:8px}
.req p{font-size:13.5px;color:var(--mut)}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:st}
.stp{background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px 22px;position:relative;transition:.3s}
.stp:hover{transform:translateY(-6px);box-shadow:var(--sh)}
.stp::before{counter-increment:st;content:counter(st);position:absolute;top:-16px;left:22px;width:36px;height:36px;border-radius:11px;background:linear-gradient(135deg,#2aabee,#1e8fd1);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 18px rgba(42,171,238,.35)}
.stp h3{font-size:16.5px;color:var(--dark);margin:8px 0 8px}
.stp p{font-size:13.5px;color:var(--mut)}
.art-wrap{display:grid;grid-template-columns:1fr 322px;gap:36px;align-items:start}
.art{background:#fff;border:1px solid var(--line);border-radius:18px;padding:40px 44px}
.art .crumb2{display:flex;gap:8px;font-size:13px;color:#9aa8b6;flex-wrap:wrap}
.art .crumb2 a:hover{color:var(--brand)}
.art h1{font-size:28px;line-height:1.42;margin:12px 0 14px;color:var(--dark)}
.art .meta{display:flex;gap:18px;flex-wrap:wrap;color:var(--mut);font-size:13px;padding-bottom:18px;border-bottom:1px solid var(--line);margin-bottom:22px}
.art .meta b{color:var(--brand);font-weight:600}
.art img.cover{border-radius:14px;margin-bottom:24px;width:100%}
.art .lead{font-size:16px;color:#2b3c4d;background:#f0f7fc;border-left:4px solid var(--brand);padding:16px 20px;border-radius:0 12px 12px 0;margin-bottom:8px}
.art h2{font-size:21px;margin:30px 0 14px;color:var(--dark);padding-left:14px;border-left:4px solid var(--brand);line-height:1.4}
.art p{font-size:15px;color:#3a4653;margin-bottom:16px;text-align:justify}
.art .fig{margin:10px 0 24px}
.art .fig img{border-radius:14px;width:100%}
.art .fig span{display:block;font-size:12px;color:#9aa8b6;text-align:center;margin-top:8px}
.art blockquote{background:#f0f7fc;border-left:4px solid var(--brand);padding:14px 20px;border-radius:0 12px 12px 0;color:#2b3c4d;font-size:14.5px;margin:18px 0}
.art blockquote b{color:var(--dark)}
.prevnext{display:flex;justify-content:space-between;gap:14px;margin-top:34px;padding-top:22px;border-top:1px solid var(--line)}
.prevnext a{flex:1;background:#f4f8fb;border:1px solid var(--line);border-radius:12px;padding:14px 16px;font-size:13.5px;transition:.2s;min-width:0}
.prevnext a:hover{border-color:var(--brand);color:var(--brand)}
.prevnext b{display:block;font-size:12px;color:#9aa8b6;font-weight:400;margin-bottom:4px}
.prevnext a.next{text-align:right}
.backlist{display:inline-block;margin:18px 0 0;color:var(--brand);font-weight:700;font-size:14px}
.rel{margin-top:14px}
.rel h3{font-size:18px;color:var(--dark);margin-bottom:14px}
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.rel a{background:#f7fafc;border:1px solid var(--line);border-radius:12px;padding:14px;font-size:13.5px;transition:.2s;color:#3a4653;display:flex;flex-direction:column;gap:8px}
.rel a:hover{border-color:var(--brand);color:var(--brand)}
.rel a img{border-radius:8px;aspect-ratio:16/9;object-fit:cover}
.cmts{margin-top:38px}
.cmts h3{font-size:19px;color:var(--dark);margin-bottom:8px}
.cmt{display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--line)}
.cmt .av{width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,#2aabee,#1e8fd1);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;flex:none;font-size:15px}
.cmt .hd{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.cmt b{font-size:14px;color:var(--dark)}
.cmt time{font-size:12px;color:#9aa8b6}
.cmt p{font-size:14px;color:#46525f;margin-top:6px}
.side{position:sticky;top:88px;display:flex;flex-direction:column;gap:20px}
.scard{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;box-shadow:var(--sh)}
.scard h4{display:flex;align-items:center;gap:10px;font-size:16px;margin-bottom:16px;color:var(--dark)}
.scard h4::before{content:"";width:4px;height:18px;background:var(--brand);border-radius:2px}
.toc{position:relative;padding-left:24px}
.toc::before{content:"";position:absolute;left:6px;top:6px;bottom:6px;width:2px;background:var(--line)}
.toc a{display:block;padding:7px 0;font-size:13.5px;color:#46525f;position:relative;transition:.2s;line-height:1.45}
.toc a::before{content:"";position:absolute;left:-21.5px;top:15px;width:9px;height:9px;border-radius:50%;background:#c6d2dc;border:2px solid #fff;box-shadow:0 0 0 2px #e3e9ef;transition:.2s}
.toc a.on{color:var(--brand);font-weight:700}
.toc a.on::before{background:var(--brand);box-shadow:0 0 0 2px #b8e2f7}
.rank a{display:flex;align-items:center;gap:12px;padding:9px 0;border-bottom:1px dashed var(--line);font-size:13.5px;color:#3a4653;transition:.2s}
.rank a:last-child{border-bottom:0}
.rank a:hover{color:var(--brand)}
.rk{width:23px;height:23px;border-radius:7px;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:800;color:#fff;flex:none;transition:.2s}
.rk1{background:linear-gradient(135deg,#2aabee,#1e8fd1)}
.rk2{background:linear-gradient(135deg,#ff9d3f,#ff7a2f)}
.rk3{background:linear-gradient(135deg,#f2c744,#f0b32e)}
.rk4,.rk5{background:#c2ceda}
.rank a:hover .rk{transform:scale(1.15)}
.pills{display:flex;flex-wrap:wrap;gap:8px}
.pill{border:1px solid var(--line);color:#46525f;font-size:12.5px;padding:5px 13px;border-radius:999px;transition:.2s}
.pill:hover{border-color:var(--brand);color:var(--brand)}
.map-list{background:#fff;border:1px solid var(--line);border-radius:16px;padding:34px}
.map-list h2{font-size:20px;color:var(--dark);margin:26px 0 14px;padding-left:14px;border-left:4px solid var(--brand)}
.map-list h2:first-child{margin-top:0}
.map-list a{display:block;padding:9px 14px;border-radius:9px;font-size:14.5px;color:#3a4653;transition:.2s;border:1px solid transparent}
.map-list a:hover{background:#eef6fc;color:var(--brand);border-color:#d4eaf9}
.map-list .grp{display:flex;gap:6px;flex-wrap:wrap}
.er404{min-height:70vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:140px 0 60px;background:linear-gradient(160deg,#0e1621,#1d3a55);color:#fff}
.er404 h1{font-size:110px;font-weight:800;line-height:1;background:linear-gradient(90deg,#6fd0ff,#2aabee);-webkit-background-clip:text;background-clip:text;color:transparent}
.er404 h2{font-size:26px;margin:14px 0 10px}
.er404 p{color:#9fb3c6;margin-bottom:26px}
.er404 .cd{display:inline-block;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);padding:8px 22px;border-radius:999px;font-size:15px;margin-bottom:24px}
.er404 .cd b{color:#2aabee}
@media(max-width:992px){
.burger{display:flex}
.menu{display:none;position:fixed;top:68px;left:0;right:0;background:rgba(14,22,33,.97);flex-direction:column;align-items:stretch;gap:2px;padding:14px 16px 20px;max-height:calc(100vh - 68px);overflow-y:auto;margin:0}
.menu.open{display:flex}
.mg{position:static}
.mg .dd{position:static;transform:none;opacity:1;visibility:visible;display:none;background:rgba(255,255,255,.06);box-shadow:none;margin:2px 0 6px;min-width:0;padding:6px}
.mg.open .dd{display:block}
.mg.open .ar{transform:rotate(180deg)}
.dd a{color:#d9e6f2}
.dd a:hover{background:rgba(255,255,255,.08);color:#fff}
.hero-g,.dl-hero-g{grid-template-columns:1fr;gap:40px}
.hero{padding:136px 0 70px}
.dl-hero{padding:136px 0 70px}
.hero h1{font-size:38px}
.features-grid{grid-template-columns:repeat(2,1fr)}
.sc-grid{grid-template-columns:repeat(2,1fr)}
.news-grid{grid-template-columns:repeat(2,1fr)}
.price-grid{grid-template-columns:1fr;max-width:460px;margin:0 auto}
.pc.hot{transform:none}
.band{grid-template-columns:1fr;padding:40px 30px}
.art-wrap{grid-template-columns:1fr}
.side{position:static;flex-direction:column}
.steps{grid-template-columns:repeat(2,1fr)}
.req-grid{grid-template-columns:repeat(2,1fr)}
.ver-grid{grid-template-columns:1fr}
.ft-in{grid-template-columns:1fr 1fr}
.chat{grid-template-columns:150px 1fr;height:420px}
}
@media(max-width:768px){
.hero h1{font-size:31px}
.hero-sub{font-size:15.5px}
.sec{padding:64px 0}
.sec-head h2{font-size:27px}
.sync-g{grid-template-columns:1fr;max-width:420px;margin:0 auto}
.features-grid{grid-template-columns:1fr 1fr;gap:14px}
.sc-grid{grid-template-columns:1fr;max-width:520px;margin:0 auto}
.ts-grid{grid-template-columns:1fr}
.news-grid{grid-template-columns:1fr;max-width:520px;margin:0 auto}
.rel-grid{grid-template-columns:1fr}
.art{padding:26px 20px}
.art h1{font-size:22px}
.steps{grid-template-columns:1fr;max-width:420px;margin:0 auto}
.req-grid{grid-template-columns:1fr 1fr;gap:14px}
.band-nums{grid-template-columns:1fr 1fr;gap:14px}
.chat{grid-template-columns:1fr;height:400px}
.chat-side{display:none}
.page-hero h1{font-size:29px}
.dl-hero h1{font-size:29px}
}
@media(max-width:480px){
.hero h1{font-size:26px}
.hero-btns .btn{width:100%}
.hero-stats{gap:22px}
.features-grid{grid-template-columns:1fr}
.req-grid{grid-template-columns:1fr}
.band-nums{grid-template-columns:1fr}
.band{padding:30px 20px}
.cta{padding:40px 22px}
.cta h2{font-size:25px}
.ft-in{grid-template-columns:1fr;gap:24px}
.chat{height:380px}
.er404 h1{font-size:80px}
.msg{max-width:88%}
}