:root{
  --ink:#0a0f1c; --ink2:#3d4759; --muted:#7c8798; --line:#e8ecf3; --soft:#f6f8fc;
  --b1:#11b8ed; --b2:#0879f8; --b3:#123ee8; --blue:#0879f8;
  --green:#16a34a;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --grad:linear-gradient(120deg,var(--b1),var(--b2) 48%,var(--b3));
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:#fff;color:var(--ink);font-family:var(--sans);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img,svg{display:block}
.wrap{max-width:1240px;margin:0 auto;padding:0 32px}
.ico{stroke:currentColor;stroke-width:1.7;fill:none;stroke-linecap:round;stroke-linejoin:round}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:21px;letter-spacing:-.02em}
/* 固定宽高比(168:128)并禁止被 flex 压缩，避免 logo 变形失真 */
.brand-mark{position:relative;display:block;flex:0 0 auto;width:58px;height:44px;overflow:hidden}
.brand-mark svg{width:100%;height:100%;display:block}
/* 扫光特效：一道高光斜向掠过 logo */
.brand-mark::after{content:"";position:absolute;top:-60%;left:-130%;width:55%;height:220%;pointer-events:none;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.9),transparent);
  transform:skewX(-22deg);animation:brandShine 4.5s ease-in-out infinite}
@keyframes brandShine{0%,70%{left:-130%}100%{left:150%}}
.brand b{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
:focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:6px}

/* 公告条 */
.topbar{background:var(--grad);color:#fff;text-align:center;font-size:13.5px;padding:11px 20px;font-weight:500}

/* 导航 —— 悬浮胶囊：离顶部悬空、左右留边、圆角卡片 */
.nav{position:sticky;top:14px;z-index:40;width:calc(100% - 44px);max-width:1300px;margin:14px auto 0;
  background:rgba(255,255,255,.9);backdrop-filter:blur(18px);border:1px solid rgba(232,236,243,.9);
  border-radius:20px;box-shadow:0 10px 38px -16px rgba(10,25,70,.28),0 2px 6px rgba(10,25,70,.04)}
.nav .nav-in{position:relative;max-width:none;height:66px;padding:0 24px;display:flex;align-items:center;justify-content:space-between;gap:34px}
/* 菜单绝对居中于导航条（左 logo / 右操作区不影响居中） */
.nlinks{position:absolute;left:50%;transform:translateX(-50%);display:flex;align-items:center;gap:30px;font-size:15.5px;color:#1f2a3d;font-weight:700}
.nlinks>a,.mega-trigger{display:flex;align-items:center;gap:5px;padding:6px 0}
.nlinks a:hover{color:var(--blue)}
.nact{display:flex;align-items:center;gap:14px;font-size:14.5px}
.nact .login{color:#414c60;font-weight:600}
.nact .login:hover{color:var(--blue)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font-weight:700;border-radius:12px;cursor:pointer;transition:.16s;white-space:nowrap;border:0;font-family:inherit}
.btn-p{background:var(--grad);color:#fff;padding:11px 22px;font-size:14.5px;box-shadow:0 12px 28px -10px rgba(8,121,248,.6)}
.btn-p:hover{filter:brightness(1.06);transform:translateY(-1px)}
.btn-g{border:1.5px solid #dde3ec;color:var(--ink);padding:13px 24px;font-size:15px;background:#fff}
.btn-g:hover{border-color:var(--blue);color:var(--blue)}
.btn-lg{padding:19px 40px;font-size:17.5px;border-radius:14px}
.btn-w{background:#fff;color:var(--b3);padding:19px 40px;font-size:17.5px;border-radius:14px;box-shadow:0 16px 40px -14px rgba(0,0,0,.4)}
.btn-w:hover{transform:translateY(-2px)}
.nav-toggle{display:none;flex-direction:column;gap:5px;margin-left:auto;background:none;border:0;padding:9px;cursor:pointer}
.nav-toggle span{width:23px;height:2px;background:var(--ink);border-radius:2px}

/* 产品大菜单 */
.nav-item{position:relative;display:flex;align-items:center}
.mega-trigger .chev{transition:transform .2s;color:#8a97ab}
.mega{position:absolute;top:calc(100% + 18px);left:-18px;width:560px;background:#fff;border:1px solid var(--line);border-radius:18px;
  box-shadow:0 30px 70px -34px rgba(10,25,70,.5);padding:14px;display:grid;grid-template-columns:1fr 1fr;gap:6px;
  opacity:0;visibility:hidden;transform:translateY(8px);transition:.18s;z-index:60}
.mega::before{content:"";position:absolute;top:-18px;left:0;right:0;height:18px}
.nav-item:hover .mega{opacity:1;visibility:visible;transform:translateY(0)}
.nav-item:hover .chev{transform:rotate(180deg)}
.mega-card{display:flex;align-items:center;gap:14px;padding:14px;border-radius:13px;transition:background .14s}
.mega-card:hover{background:var(--soft)}
.mega-ic{width:44px;height:44px;border-radius:13px;display:grid;place-items:center;flex:0 0 auto;color:#fff}
.mega-ic .ico{width:23px;height:23px;stroke-width:1.8}
.mega-card b{display:block;font-size:15px;font-weight:750;color:var(--ink)}
.mega-card small{display:block;font-size:12.5px;color:var(--muted);margin-top:3px}

/* 语言 */
.lang-switch{position:relative}
.lang{display:inline-flex;align-items:center;gap:7px;background:none;border:0;cursor:pointer;font-family:inherit;padding:6px;color:#8a97ab}
.lang .chev2{width:13px;height:13px;transition:transform .2s}
.lang[aria-expanded="true"] .chev2{transform:rotate(180deg)}
/* 平面国旗（SVG，跨平台显示一致；emoji 国旗在 Windows 上不渲染） */
.flag{width:24px;height:17px;border-radius:3px;display:block;flex:0 0 auto;box-shadow:0 0 0 1px rgba(10,25,70,.1)}
.lang-menu button{display:flex;align-items:center;gap:10px}
.lang:hover{color:var(--blue)}
.lang-menu{position:absolute;right:0;top:calc(100% + 10px);min-width:190px;background:#fff;border:1px solid var(--line);border-radius:13px;
  box-shadow:0 24px 50px -28px rgba(10,25,70,.45);padding:7px;z-index:70}
.lang-menu button{display:block;width:100%;text-align:left;padding:10px 13px;border:0;background:none;border-radius:9px;font-size:14.5px;color:var(--ink);cursor:pointer;font-family:inherit}
.lang-menu button:hover:not(:disabled){background:var(--soft);color:var(--blue)}
.lang-menu button.active{color:var(--blue);font-weight:700}
.lang-menu button:disabled{color:#aeb7c4;cursor:not-allowed}

/* 品牌渐变块 */
.g1{background:linear-gradient(135deg,#38bdf8,#0879f8)}
.g2{background:linear-gradient(135deg,#6366f1,#4338ca)}
.g3{background:linear-gradient(135deg,#11b8ed,#0e9488)}
.g4{background:linear-gradient(135deg,#a855f7,#6d28d9)}

/* HERO */
.hero{position:relative;overflow:hidden;text-align:center;padding:82px 32px 0;background:
  radial-gradient(70% 55% at 50% -8%,rgba(8,121,248,.09),transparent 70%),
  radial-gradient(40% 40% at 88% 10%,rgba(17,184,237,.10),transparent 70%)}
.hero>*:not(.hero-deco){position:relative;z-index:1}

/* ── Hero 背景装饰：两侧网络动画 ── */
.hero-deco{position:absolute;inset:0;z-index:0;pointer-events:none;overflow:hidden}
/* 漂浮光晕 */
.orb{position:absolute;border-radius:50%;filter:blur(52px);opacity:.5}
.orb.o1{width:340px;height:340px;left:-90px;top:60px;background:radial-gradient(circle,rgba(17,184,237,.5),transparent 70%);animation:orbDrift 20s ease-in-out infinite}
.orb.o2{width:400px;height:400px;right:-110px;top:200px;background:radial-gradient(circle,rgba(8,121,248,.38),transparent 70%);animation:orbDrift 26s ease-in-out infinite reverse}
@keyframes orbDrift{0%,100%{transform:translate(0,0)}50%{transform:translate(28px,-34px)}}
/* 网络主干线 */
.spine{position:absolute;top:0;height:100%;width:240px}
.sp-l{left:2.5%}
.sp-r{right:2.5%}
.spine .ln{fill:none;stroke:var(--b2);stroke-width:1.4;opacity:.24;stroke-dasharray:5 7;animation:lnFlow 18s linear infinite}
.spine .ln.d2{stroke:var(--b1);opacity:.18;animation-duration:24s;animation-direction:reverse}
@keyframes lnFlow{to{stroke-dashoffset:-240}}
.spine .nd{fill:var(--b2);opacity:.75}
.spine .pulse{fill:var(--b2);opacity:.16;transform-box:fill-box;transform-origin:center;animation:decoPulse 3.4s ease-out infinite}
.spine .pt.s1 .pulse{animation-delay:1.1s}
.spine .pt.s2 .pulse{animation-delay:2.2s}
@keyframes decoPulse{0%{transform:scale(.5);opacity:.34}75%{transform:scale(2);opacity:0}100%{transform:scale(2);opacity:0}}
/* 沿线飞行的数据包 */
.spine .spark{fill:var(--b2);filter:drop-shadow(0 0 6px rgba(8,121,248,.75))}
.spine .spark.s{fill:var(--b1)}
/* 协议 / IP 标签 */
.chip{position:absolute;display:inline-flex;align-items:center;gap:7px;padding:9px 15px;border-radius:12px;
  background:rgba(255,255,255,.82);backdrop-filter:blur(8px);border:1px solid rgba(210,222,240,.9);
  font-size:13px;font-weight:700;color:#33415a;white-space:nowrap;
  box-shadow:0 14px 30px -18px rgba(10,25,70,.5);animation:chipFloat 7s ease-in-out infinite}
.chip .ico{width:15px;height:15px;color:var(--b2);stroke-width:2}
.chip.mono{font-family:ui-monospace,"SF Mono",Menlo,monospace;font-size:12px;letter-spacing:.02em;color:var(--b3)}
@keyframes chipFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-13px)}}
.cL1{left:4%;top:20%;animation-delay:0s}
.cL2{left:9.5%;top:40%;animation-delay:1.3s}
.cL3{left:3%;top:60%;animation-delay:2.4s}
.cR1{right:4.5%;top:24%;animation-delay:.7s}
.cR2{right:9%;top:45%;animation-delay:1.9s}
.cR3{right:3.5%;top:64%;animation-delay:3.1s}
@media(max-width:1240px){.chip{display:none}.spine{opacity:.6}}
@media(max-width:900px){.hero-deco .spine{display:none}.orb{opacity:.35}}
/* Hero 徽标：蓝底白字 */
.rate{display:inline-flex;align-items:center;gap:9px;margin-bottom:32px;font-size:15px;color:#fff;font-weight:600;
  background:var(--grad);border-radius:999px;padding:10px 22px;box-shadow:0 14px 30px -14px rgba(8,121,248,.65)}
.rate-ic{font-size:16px;line-height:1}
h1{font-size:clamp(32px,4.9vw,58px);line-height:1.14;font-weight:900;letter-spacing:-.03em;margin:0 auto 26px;max-width:22ch;text-wrap:balance}
h1 .g{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:clamp(17px,1.9vw,21px);color:#525f73;max-width:none;margin:0 auto 40px;line-height:1.55;font-weight:450;white-space:nowrap}
.hcta{display:flex;justify-content:center;gap:16px;flex-wrap:wrap;margin-bottom:56px}
/* Google 按钮 */
.btn-google{background:#fff;color:#3c4043;border:1.5px solid #dde3ec;font-weight:650}
.btn-google:hover{border-color:#c3cddc;background:#fafbfd}
.btn-google svg{flex:0 0 auto}

/* ===== 世界节点地图 ===== */
.mapwrap{position:relative;max-width:1080px;margin:0 auto;padding:0 8px}
.worldmap{width:100%;height:auto;overflow:visible}
/* 陆地点阵 */
.worldmap .dot{fill:#c9d6e8;transition:fill .5s}
.mapwrap:hover .dot{fill:#bcccE2}
/* 节点标记 */
.worldmap .node{cursor:pointer}
.worldmap .hit{fill:#fff;fill-opacity:0;stroke:none}   /* 透明热区，扩大可悬停范围 */
.worldmap .node .halo{fill:var(--b2);opacity:.22;transform-box:fill-box;transform-origin:center;animation:nodePulse 2.8s ease-out infinite}
.worldmap .node .core{fill:var(--b2);stroke:#fff;stroke-width:1.6;transition:r .16s,fill .16s}
.worldmap .node.big .core{fill:var(--b3)}
.worldmap .node.hot .core{r:7;fill:var(--b3)}
.worldmap .node.hot .halo{opacity:.42}
@keyframes nodePulse{0%{transform:scale(.55);opacity:.45}70%{transform:scale(1.9);opacity:0}100%{transform:scale(1.9);opacity:0}}
/* 悬停气泡（独立顶层，永远盖在节点之上） */
.worldmap .tip{opacity:0;visibility:hidden;transition:opacity .15s;pointer-events:none}
.worldmap .tip.on{opacity:1;visibility:visible}
.worldmap .tip rect{fill:#0b1526}
.worldmap .tip .tail{fill:#0b1526}
.worldmap .tip text{fill:#fff;font-size:11.5px;font-weight:700;font-family:var(--sans)}
.worldmap .tip text.pz{fill:#7fd0ff;font-size:10.5px;font-weight:600}
/* 连线 */
.worldmap .link{stroke:var(--b2);stroke-width:1.1;fill:none;opacity:.3;stroke-dasharray:4 5;animation:linkFlow 14s linear infinite}
@keyframes linkFlow{to{stroke-dashoffset:-180}}
.map-legend{display:inline-flex;align-items:center;gap:9px;margin-top:16px;font-size:13.5px;color:var(--muted);font-weight:550}
.ml-live{width:8px;height:8px;border-radius:50%;background:#16a34a;box-shadow:0 0 0 4px rgba(22,163,74,.16);animation:liveBlink 2s ease-in-out infinite}
@keyframes liveBlink{50%{opacity:.45}}

/* 产品截图（暂未使用，保留样式以便随时切回） */
.shot{max-width:1080px;margin:0 auto;border-radius:20px;overflow:hidden;border:1px solid #e4e9f1;background:#fff;
  box-shadow:0 4px 10px rgba(10,20,50,.04),0 60px 110px -50px rgba(10,25,70,.55)}
.shot-bar{display:flex;align-items:center;gap:8px;padding:15px 20px;border-bottom:1px solid #eef1f6;background:#fbfcfe}
.shot-bar i{width:12px;height:12px;border-radius:50%;background:#dfe4ec}
.shot-body{display:grid;grid-template-columns:224px 1fr;text-align:left}
.sb-side{background:#0b1526;padding:22px 16px}
.sb-brand{display:flex;align-items:center;gap:9px;color:#fff;font-weight:800;font-size:16px;margin-bottom:22px;padding:0 6px}
.sb-brand svg{height:22px;width:auto}
.sb-brand b{color:#7fb0ff;background:none;-webkit-text-fill-color:#7fb0ff}
.sb-cap{font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:#5a6b86;margin:16px 8px 9px}
.sb-nav{display:flex;align-items:center;gap:11px;font-size:13.5px;color:#98a9c2;padding:10px 11px;border-radius:9px}
.sb-nav .ico{width:17px;height:17px;stroke:#8298b6;flex:0 0 auto}
.sb-nav.on{background:rgba(8,121,248,.22);color:#fff}
.sb-nav.on .ico{stroke:#7fb0ff}
.sb-main{padding:28px 30px;background:#f8fafd}
.sb-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px;gap:14px;flex-wrap:wrap}
.sb-h{font-size:21px;font-weight:800}
.sb-sub{font-size:14px;color:#647089}
.rgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:13px}
.rc{background:#fff;border:1px solid #e9edf4;border-radius:13px;padding:15px 17px}
.rc.sel{border-color:var(--blue);box-shadow:0 0 0 3px rgba(8,121,248,.1)}
.rc .t{display:flex;align-items:center;gap:9px;margin-bottom:13px}
.rc .fl{display:inline-flex;line-height:0;flex:0 0 auto}
.rc .fl svg{width:26px;height:17.3px;border-radius:2.5px;box-shadow:0 0 0 1px rgba(20,40,80,.09)}
.rc .n{font-size:13.5px;font-weight:750}
.rc .c{font-size:11px;color:#9aa5b5}
.rc .p{font-size:16px;font-weight:800;color:var(--blue);letter-spacing:-.02em}
.rc .p small{font-size:12px;font-weight:600;color:#8b96a8}

/* 信任条 —— 品牌蓝底 */
.trust{margin-top:104px;background:var(--grad);color:#fff;position:relative;overflow:hidden}
.trust::after{content:"";position:absolute;inset:0;background:radial-gradient(60% 120% at 82% 0%,rgba(255,255,255,.16),transparent 70%);pointer-events:none}
.trust-in{position:relative;z-index:1;display:grid;grid-template-columns:repeat(4,1fr);gap:32px;padding:50px 0}
.tr{display:flex;align-items:center;gap:16px}
.tr .ic{width:52px;height:52px;border-radius:15px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.26);
  display:grid;place-items:center;flex:0 0 auto;color:#fff;backdrop-filter:blur(6px)}
.tr .ic .ico{width:26px;height:26px}
.tr b{font-size:17px;font-weight:800;display:block;letter-spacing:-.01em;color:#fff}
.tr span{font-size:13.5px;color:#d3e4ff}

/* section */
.sec{padding:120px 0}
.sec.alt{background:var(--soft)}
.shead{max-width:720px;margin:0 auto 64px;text-align:center}
.kbd{display:inline-block;font-size:12.5px;font-weight:800;letter-spacing:.22em;text-transform:uppercase;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:18px}
.shead h2{font-size:clamp(34px,4.8vw,56px);font-weight:900;letter-spacing:-.035em;margin:0 0 18px;line-height:1.06;text-wrap:balance}
.shead p{color:#5b6879;font-size:19px;margin:0}

/* 产品卡 */
.pgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.pc{position:relative;display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:22px;padding:36px 30px;transition:.2s}
.pc:hover{transform:translateY(-8px);box-shadow:0 50px 90px -46px rgba(10,25,70,.45);border-color:#d5e0f2}
.pc.hot{border-color:transparent;box-shadow:0 0 0 2px var(--b2),0 40px 80px -44px rgba(8,121,248,.6)}
.tag{position:absolute;top:-13px;left:30px;background:var(--grad);color:#fff;font-size:12px;font-weight:800;padding:6px 14px;border-radius:999px;letter-spacing:.04em}
.pc .pic{width:56px;height:56px;border-radius:17px;display:grid;place-items:center;margin-bottom:24px;color:#fff}
.pc .pic .ico{width:28px;height:28px;stroke-width:1.8}
.pc h3{font-size:21px;font-weight:850;margin:0 0 10px;letter-spacing:-.02em}
.pc .pd{font-size:14px;color:var(--muted);margin:0 0 26px;min-height:44px;line-height:1.6}
.pc .pr{display:flex;align-items:baseline;gap:7px;padding-bottom:26px;margin-bottom:26px;border-bottom:1px solid var(--line)}
.pc .pr s{text-decoration:none;font-size:13.5px;color:var(--muted)}
.pc .pr b{font-size:42px;font-weight:900;letter-spacing:-.04em;line-height:1}
.pc .pr small{font-size:13.5px;color:var(--muted);font-weight:650;white-space:nowrap}
.pc .pr-note{margin:-14px 0 26px;font-size:12.5px;font-weight:700;color:var(--b2);letter-spacing:-.01em}
.pc ul{list-style:none;padding:0;margin:0 0 30px;display:grid;gap:13px}
.pc li{display:flex;align-items:flex-start;gap:11px;font-size:14px;color:var(--ink2)}
.pc li .ck{width:18px;height:18px;stroke:var(--green);stroke-width:2.6;flex:0 0 auto;margin-top:3px}
.pbtn{margin-top:auto;text-align:center;padding:15px;border-radius:13px;font-weight:750;font-size:15.5px;background:var(--soft);color:var(--ink);border:1px solid var(--line);transition:.16s}
.pc:hover .pbtn,.pc.hot .pbtn{background:var(--grad);color:#fff;border-color:transparent}
.pnote{text-align:center;color:var(--muted);font-size:14px;margin:40px 0 0}

/* 数字带 */
.band{background:var(--grad);color:#fff;position:relative;overflow:hidden}
.band::after{content:"";position:absolute;inset:0;background:radial-gradient(50% 90% at 80% 0%,rgba(255,255,255,.18),transparent 70%)}
.band-in{position:relative;z-index:1;display:grid;grid-template-columns:repeat(4,1fr);gap:30px;padding:80px 0;text-align:center}
.bn b{display:block;font-size:clamp(40px,5.2vw,62px);font-weight:900;letter-spacing:-.04em;line-height:1}
.bn span{font-size:15.5px;color:#d5e6ff;margin-top:12px;display:block;font-weight:500}

/* 地区 */
.lgrid{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.loc{display:flex;align-items:center;gap:13px;padding:20px 22px;background:#fff;border:1px solid var(--line);border-radius:16px;font-weight:700;font-size:15.5px;transition:.16s}
.loc:hover{transform:translateY(-3px);box-shadow:0 26px 50px -30px rgba(10,25,70,.45);border-color:#d5e0f2}
.loc .fl{display:inline-flex;line-height:0;flex:0 0 auto}
.loc .fl svg{width:30px;height:20px;border-radius:3px;box-shadow:0 0 0 1px rgba(20,40,80,.1)}
.loc.more{justify-content:center;background:var(--grad);color:#fff;border-color:transparent}

/* 特性卡 */
.fgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.fc{background:#fff;border:1px solid var(--line);border-radius:22px;padding:40px 34px;transition:.18s}
.fc:hover{transform:translateY(-5px);box-shadow:0 40px 80px -46px rgba(10,25,70,.4)}
.fc .fi{width:56px;height:56px;border-radius:17px;background:var(--soft);display:grid;place-items:center;color:var(--blue);margin-bottom:24px}
.fc .fi .ico{width:27px;height:27px}
.fc h4{font-size:19.5px;font-weight:850;margin:0 0 12px;letter-spacing:-.02em}
.fc p{margin:0;font-size:15px;color:#5b6879;line-height:1.7}

/* 场景 */
.ugrid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.uc{display:flex;align-items:center;gap:14px;padding:24px 22px;background:#fff;border:1px solid var(--line);border-radius:16px;font-weight:700;font-size:15.5px;transition:.16s}
.uc:hover{border-color:var(--blue);color:var(--blue)}
.uc .ico{width:23px;height:23px;color:var(--blue);flex:0 0 auto}

/* FAQ */
.faq{max-width:880px;margin:0 auto}
details{border:1px solid var(--line);border-radius:16px;background:#fff;margin-bottom:14px;overflow:hidden}
details[open]{border-color:#cfdcf3;box-shadow:0 20px 44px -34px rgba(10,25,70,.4)}
summary{list-style:none;cursor:pointer;padding:26px 30px;font-weight:750;font-size:17.5px;display:flex;justify-content:space-between;gap:18px;align-items:center}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:var(--blue);font-size:27px;font-weight:300;transition:.2s;line-height:1}
details[open] summary::after{transform:rotate(45deg)}
details p{margin:0 30px 28px;color:#5b6879;font-size:16px;line-height:1.8}

/* 尾部 CTA */
.final{background:var(--grad);color:#fff;text-align:center;padding:130px 32px;position:relative;overflow:hidden}
.final::after{content:"";position:absolute;inset:0;background:radial-gradient(55% 75% at 50% 0%,rgba(255,255,255,.2),transparent 70%)}
.final>*{position:relative;z-index:1}
.final h2{font-size:clamp(36px,5.4vw,62px);font-weight:900;letter-spacing:-.04em;margin:0 0 22px;line-height:1.05}
.final p{color:#dbeaff;font-size:20px;margin:0 0 42px}

/* 页脚 */
.foot{background:#080d18;color:#a9b4c6;padding:88px 0 36px}
.fgrid2{display:grid;grid-template-columns:2.2fr 1fr 1fr 1fr;gap:48px}
.foot .brand{color:#fff;margin-bottom:20px}
.foot .tag2{font-size:15px;color:#7a8698;max-width:32ch;margin:0;line-height:1.7}
.fcol h5{font-size:14px;color:#fff;font-weight:750;margin:0 0 20px}
.fcol a{display:block;font-size:14.5px;color:#8b97ab;padding:7px 0}
.fcol a:hover{color:#fff}
.fbot{margin-top:64px;padding-top:30px;border-top:1px solid rgba(255,255,255,.08);font-size:13.5px;color:#6a7688;line-height:1.8}

@media(max-width:1000px){
  .pgrid,.fgrid{grid-template-columns:repeat(2,1fr)}
  .lgrid,.ugrid{grid-template-columns:repeat(3,1fr)}
  .trust-in,.band-in{grid-template-columns:repeat(2,1fr)}
  .shot-body{grid-template-columns:1fr}.sb-side{display:none}
  .fgrid2{grid-template-columns:1fr 1fr}
  .sec{padding:88px 0}
  .nlinks{display:none}
  .nav-toggle{display:flex}
  .lead{white-space:normal;max-width:46ch}
  .nav.open .nlinks{display:flex;position:absolute;top:100%;left:0;right:0;transform:none;flex-direction:column;align-items:stretch;gap:0;
    background:#fff;border:1px solid var(--line);border-radius:18px;margin-top:8px;padding:8px 24px 16px;
    box-shadow:0 24px 50px -26px rgba(10,25,70,.45)}
  .nav.open .nlinks>a,.nav.open .mega-trigger{padding:15px 0;border-bottom:1px solid var(--line)}
  .nav.open .nav-item{display:block}
  .mega{display:none}
  .chev{display:none}
}
@media(max-width:620px){
  .pgrid,.fgrid,.ugrid{grid-template-columns:1fr}
  .lgrid{grid-template-columns:repeat(2,1fr)}
  .trust-in{grid-template-columns:1fr}
  .rgrid{grid-template-columns:1fr}
  .sec{padding:68px 0}.wrap{padding:0 20px}
  .hero{padding-top:56px}
  .lead{white-space:normal;max-width:40ch}
  .hcta .btn{width:100%}
  .nact .login{display:none}
  .nav{width:calc(100% - 28px);top:10px;margin-top:10px;border-radius:16px}
  .nav .nav-in{height:60px;padding:0 16px}
  .brand-mark{width:50px;height:38px}
  .brand{font-size:19px;gap:9px}
  .final{padding:88px 24px}
}
/* 四个蓝色区块的背景动效已经改成 canvas + requestAnimationFrame（见 deco.js）——
   rAF 不受 prefers-reduced-motion 影响，Windows 关掉「动画效果」也照常运行，
   客户不需要做任何设置。这里只保留对交互过渡和其余 CSS 动画的抑制。 */
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}

/* ===== 可用地区与价格查询 ===== */
.rq-tabs{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-bottom:26px}
.rq-tab{padding:11px 24px;border-radius:999px;border:1.5px solid var(--line);background:#fff;color:#41506a;
  font-size:15px;font-weight:700;cursor:pointer;font-family:inherit;transition:.16s}
.rq-tab:hover{border-color:#bcd0ea;color:var(--blue)}
.rq-tab.active{background:var(--grad);border-color:transparent;color:#fff;box-shadow:0 12px 26px -12px rgba(8,121,248,.7)}
.rq-meta{display:flex;align-items:baseline;justify-content:center;gap:12px;margin-bottom:26px;font-size:14px;color:var(--muted)}
.rq-meta b{color:var(--ink);font-weight:800}
.rq-upd{font-size:12.5px;opacity:.75}
.rq-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.rq-card{position:relative;display:flex;flex-direction:column;gap:14px;padding:22px;background:#fff;border:1px solid var(--line);
  border-radius:18px;transition:.18s;animation:rqIn .3s ease both}
.rq-card:hover{transform:translateY(-5px);box-shadow:0 36px 66px -40px rgba(10,25,70,.45);border-color:#cfdcf3}
@keyframes rqIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
.rq-head{display:flex;align-items:center;gap:12px}
.rq-flag{display:inline-flex;line-height:0;flex:0 0 auto}
.rq-flag svg{width:34px;height:22.7px;border-radius:3.5px;box-shadow:0 0 0 1px rgba(20,40,80,.1)}
.rq-name{font-size:17px;font-weight:800;letter-spacing:-.01em}
.rq-sub{font-size:12.5px;color:var(--muted);margin-top:2px}
.rq-price{display:flex;align-items:baseline;gap:5px;padding-top:14px;border-top:1px dashed var(--line)}
.rq-price s{text-decoration:none;font-size:12px;color:var(--muted)}
.rq-price b{font-size:26px;font-weight:900;letter-spacing:-.03em;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.rq-price small{font-size:12.5px;color:var(--muted);font-weight:650}
.rq-tags{display:flex;flex-wrap:wrap;gap:6px}
.rq-tag{font-size:11.5px;font-weight:700;color:var(--b3);background:#eaf2ff;border-radius:6px;padding:3px 9px}
.rq-cities{font-size:12px;color:#6b7788;line-height:1.6}
.rq-buy{margin-top:auto;text-align:center;padding:11px;border-radius:11px;background:var(--soft);border:1px solid var(--line);
  font-size:14px;font-weight:750;color:var(--ink);transition:.16s}
.rq-card:hover .rq-buy{background:var(--grad);color:#fff;border-color:transparent}
.rq-empty{grid-column:1/-1;text-align:center;padding:52px;color:var(--muted);font-size:15px;
  border:1px dashed var(--line);border-radius:18px}
@media(max-width:1000px){.rq-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:620px){.rq-grid{grid-template-columns:1fr}.rq-tab{padding:9px 18px;font-size:14px}}

/* ===== 尾部 CTA 装饰：旋转轨道环 + 上升粒子 ===== */
.final .final-deco{position:absolute;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.orbit{position:absolute;width:460px;height:460px;top:50%;transform:translateY(-50%);opacity:.55}
.ob-l{left:-150px}
.ob-r{right:-150px}
.or{fill:none;stroke:rgba(255,255,255,.4);stroke-width:1.2;transform-origin:150px 150px}
.o1{stroke-dasharray:6 11;animation:orbSpin 30s linear infinite}
.o2{stroke-dasharray:3 9;stroke:rgba(255,255,255,.3);animation:orbSpin 20s linear infinite reverse}
.o3{stroke-dasharray:12 7;animation:orbSpin 14s linear infinite}
@keyframes orbSpin{to{transform:rotate(360deg)}}
.od{fill:rgba(255,255,255,.85);transform-origin:150px 150px;animation:orbSpin 30s linear infinite}
.od.d2{fill:rgba(255,255,255,.45);animation-duration:20s;animation-direction:reverse}
/* 上升粒子 */
@media(max-width:900px){.orbit{width:320px;height:320px;opacity:.35}.ob-l{left:-140px}.ob-r{right:-140px}
  .f3,.f4,.f7,.f8{display:none}}

/* ===== 信任条装饰：横向流光（横向平移，区别于其它区块） ===== */
.trust-deco{position:absolute;inset:0;z-index:0;pointer-events:none;overflow:hidden}

/* ===== 数字带装饰：数据柱状条（高度起伏，呼应"统计"语义） ===== */
.band-deco{position:absolute;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.cta-particles{position:absolute;inset:0;z-index:0;pointer-events:none;display:block}
.bars-r i{background:rgba(255,255,255,.34)}
@media(max-width:900px){.bars{gap:6px}.bars i{width:7px}.bars-l{left:1%}.bars-r{right:1%}}
@media(max-width:620px){.band-deco,.trust-deco .beam{opacity:.5}}

/* ===== 应用场景：蓝底 + 扩散涟漪（尺度扩张，第五种动效语言） ===== */
.sec.uc-blue{position:relative;overflow:hidden;background:var(--grad);color:#fff}
.sec.uc-blue::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(60% 100% at 20% 0%,rgba(255,255,255,.14),transparent 70%)}
.sec.uc-blue .wrap{position:relative;z-index:1}
.sec.uc-blue .kbd{background:none;-webkit-background-clip:border-box;background-clip:border-box;
  -webkit-text-fill-color:rgba(255,255,255,.9);color:rgba(255,255,255,.9)}
.sec.uc-blue .shead h2{color:#fff}
.sec.uc-blue .shead p{color:#d7e7ff}
.sec.uc-blue .uc{background:rgba(255,255,255,.13);border-color:rgba(255,255,255,.24);color:#fff;backdrop-filter:blur(8px)}
.sec.uc-blue .uc .ico{color:#fff}
.sec.uc-blue .uc:hover{background:rgba(255,255,255,.22);border-color:rgba(255,255,255,.5);color:#fff;transform:translateY(-3px)}
/* 扩散涟漪 */
.uc-deco{position:absolute;inset:0;z-index:0;pointer-events:none;overflow:hidden}
/* 涟漪中心的十字准星 */
@media(max-width:1000px){.uc-deco{opacity:.5}}
@media(max-width:620px){.uc-deco{display:none}}