/* 零声远程 · 官网  —— 纯静态，无外部资源 */
:root{
  --brand-1:#EFF5FD; --brand-2:#DDE9FC; --brand-3:#BCD4F8; --brand-4:#8EB7F3; --brand-5:#629AEF;
  --brand-6:#4085EB; --brand-7:#1E6FE8; --brand-8:#1A5EC5; --brand-9:#154EA2; --brand-10:#0F3874;
  --text-1:rgba(0,0,0,.9); --text-2:rgba(0,0,0,.6); --text-3:rgba(0,0,0,.4); --text-4:rgba(0,0,0,.26);
  --bg:#F5F7FA; --panel:#F7F8FA; --line:#E8E8E8; --line-2:#DDDDDD; --split:rgba(0,0,0,.06);
  --ok:#2BA471; --ok-1:#E3F9E9; --ok-ink:#1D8655; --err:#D54941; --wx:#07C160;
  --r-s:3px; --r-m:6px; --r-l:9px; --r-win:8px;
  --sh-card:0 0 0 1px rgba(15,56,116,.04),0 1px 2px rgba(16,24,40,.04),0 10px 30px rgba(16,24,40,.06);
  --sh-float:0 0 0 1px rgba(15,56,116,.05),0 6px 30px 5px rgba(16,24,40,.05),0 16px 24px 2px rgba(16,24,40,.05),0 8px 10px -5px rgba(16,24,40,.08);
  --sh-win:0 0 0 1px rgba(0,0,0,.08),0 30px 70px rgba(15,35,80,.20),0 8px 20px rgba(15,35,80,.10);
  --d-win:#111317; --d-bar:#1E2127; --d-tab:#2C3038; --d-tool:rgba(30,33,39,.94);
  --d-1:rgba(255,255,255,.92); --d-2:rgba(255,255,255,.62); --d-3:rgba(255,255,255,.4); --d-line:rgba(255,255,255,.1);
  --live:#3CC48A;
  --font:"PingFang SC","Microsoft YaHei UI","Microsoft YaHei",system-ui,sans-serif;
  --num:"Segoe UI Variable Display","Segoe UI","SF Pro Display",var(--font);
  --nav-h:60px;
  color-scheme:light;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text-1);font-family:var(--font);font-size:15px;line-height:1.7;
     -webkit-font-smoothing:antialiased;overflow-x:hidden}
h1,h2,h3,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
[hidden]{display:none!important}
.num{font-family:var(--num);font-variant-numeric:tabular-nums}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.i{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}
.wrap{max-width:1200px;margin:0 auto;padding:0 40px}
:focus-visible{outline:2px solid var(--brand-7);outline-offset:2px;border-radius:var(--r-m)}
.skip{position:absolute;left:16px;top:12px;z-index:100;background:#fff;color:var(--brand-8);padding:8px 14px;border-radius:var(--r-m);box-shadow:var(--sh-card);transform:translateY(-200%);opacity:0}
.skip:focus{transform:none;opacity:1}

/* ---------- 按钮 / 标签 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:36px;padding:0 16px;border-radius:var(--r-m);
     border:1px solid var(--line-2);background:#fff;color:var(--text-1);font-size:14px;font-weight:500;line-height:1;white-space:nowrap;
     transition:background-color .15s,border-color .15s,box-shadow .15s,transform .15s}
.btn.primary{background:var(--brand-7);border-color:var(--brand-7);color:#fff}
.btn.primary:hover{background:var(--brand-8);border-color:var(--brand-8)}
.btn.primary:active{background:var(--brand-9);border-color:var(--brand-9)}
.btn.sm{height:28px;padding:0 12px;font-size:12px;gap:6px}
.btn.sm .i{width:14px;height:14px}
.btn.xl{height:52px;padding:0 28px;font-size:17px;font-weight:600;gap:10px}
.btn.xl .i{width:20px;height:20px}
.btn.block{display:flex;width:100%}
.btn.white{background:#fff;border-color:#fff;color:var(--brand-8)}
.btn.white:hover{background:var(--brand-1);border-color:var(--brand-1)}
.pill{display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:999px;background:var(--brand-2);color:var(--brand-8);font-size:13px;font-weight:600;letter-spacing:.02em;white-space:nowrap}
.tile{width:40px;height:40px;border-radius:var(--r-l);display:grid;place-items:center;background:var(--brand-1);color:var(--brand-7);flex-shrink:0}
.tile .i{width:22px;height:22px}
.tile.wx{background:#E6F8EE;color:var(--wx)}

/* ---------- 顶部导航 ---------- */
.nav{position:sticky;top:0;z-index:50;height:var(--nav-h);background:rgba(255,255,255,.92);
     -webkit-backdrop-filter:saturate(180%) blur(12px);backdrop-filter:saturate(180%) blur(12px);
     box-shadow:0 1px 0 rgba(0,0,0,.06);transition:box-shadow .2s}
.nav.scrolled{box-shadow:0 1px 0 rgba(0,0,0,.06),0 4px 16px rgba(16,24,40,.06)}
.nav-in{height:100%;display:flex;align-items:center;gap:20px}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;letter-spacing:.02em;color:var(--text-1);flex-shrink:0}
.brand .logo{width:28px;height:28px;display:block}
.nav-links{display:flex;align-items:center;gap:2px;padding-left:14px;border-left:1px solid var(--line);font-size:14px;white-space:nowrap}
.nav-links a{padding:6px 10px;border-radius:var(--r-m);color:rgba(0,0,0,.62);transition:color .15s,background-color .15s}
.nav-links a:hover{color:var(--brand-8);background:var(--brand-1)}
.nav-btn{margin-left:auto;height:34px}

/* ---------- 首屏 ---------- */
.hero{position:relative;isolation:isolate;padding:92px 0 72px}
.hero-bg{position:absolute;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(38% 55% at 0% 38%,rgba(43,164,113,.08),rgba(43,164,113,0) 70%),
    radial-gradient(42% 60% at 100% 0%,rgba(30,111,232,.13),rgba(30,111,232,0) 72%),
    radial-gradient(30% 40% at 62% 100%,rgba(30,111,232,.06),rgba(30,111,232,0) 70%),
    linear-gradient(rgba(15,56,116,.055) 1px,transparent 1px) 0 0/40px 40px,
    linear-gradient(90deg,rgba(15,56,116,.055) 1px,transparent 1px) 0 0/40px 40px,
    #F6F8FC;
  -webkit-mask-image:linear-gradient(#000 72%,transparent);mask-image:linear-gradient(#000 72%,transparent)}
.hero-in{display:grid;grid-template-columns:minmax(0,1fr) 400px;gap:72px;align-items:center}
.hero h1{margin-top:22px;font-size:58px;line-height:1.2;font-weight:800;letter-spacing:.01em;color:#0F1A2E}
.hero h1 em{font-style:normal;color:var(--brand-7)}
.lead{margin-top:22px;max-width:640px;font-size:17px;line-height:1.85;color:var(--text-2)}
.facts{margin-top:36px;display:grid;gap:18px}
.facts li{display:flex;align-items:center;gap:28px;min-height:30px;padding-left:16px;border-left:3px solid var(--brand-7);font-size:14px;color:var(--text-2)}
.facts b{flex-shrink:0;width:72px;font-size:16px;font-weight:700;color:var(--text-1)}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{display:inline-flex;align-items:center;gap:6px;height:30px;padding:0 12px;border-radius:999px;background:#fff;
      box-shadow:0 0 0 1px rgba(0,0,0,.07),0 1px 2px rgba(16,24,40,.04);font-size:13px;color:var(--text-1);white-space:nowrap}
.chip .i{width:15px;height:15px;color:var(--brand-7)}

/* 下载卡片 */
.dl-card{position:relative;background:#fff;border-radius:var(--r-l);padding:32px 32px 26px;box-shadow:var(--sh-float);scroll-margin-top:calc(var(--nav-h) + 24px)}
.dl-card h2{font-size:24px;line-height:1.35;font-weight:700}
.dl-sub{margin-top:6px;font-size:14px;color:var(--text-2)}
.dl-card .btn.xl{margin-top:24px}
.dl-meta{margin-top:12px;text-align:center;font-size:13px;color:rgba(0,0,0,.55)}
.dl-note{margin-top:8px;font-size:12.5px;line-height:1.7;text-align:center;color:var(--text-2)}
.dl-row{margin-top:22px;display:flex;align-items:center;gap:14px;padding:14px 16px;border-radius:var(--r-l);background:var(--panel);box-shadow:inset 0 0 0 1px rgba(0,0,0,.04)}
.dl-row-t{display:flex;flex-direction:column;line-height:1.5}
.dl-row-t b{font-size:15px;font-weight:600}
.dl-row-t small{font-size:13px;color:var(--text-2)}
.dl-mac{margin-top:16px;display:flex;align-items:center;justify-content:center;gap:6px;font-size:13px;color:rgba(0,0,0,.55)}
.dl-mac .i{width:14px;height:14px}

/* ---------- 通用分区 ---------- */
.sec{padding:96px 0;scroll-margin-top:var(--nav-h)}
.sec-white{background:#fff}
.sec-start{padding-top:48px}
.sec-head{text-align:center;max-width:720px;margin:0 auto}
.sec-head h2{margin-top:16px;font-size:38px;line-height:1.3;font-weight:800;color:#0F1A2E;letter-spacing:.01em}
.sec-head p{margin-top:12px;font-size:16px;color:var(--text-2)}

/* ---------- 三步 ---------- */
.steps{margin-top:56px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;counter-reset:s}
.step{position:relative;background:#fff;border-radius:var(--r-l);box-shadow:var(--sh-card);padding:10px 10px 26px;display:flex;flex-direction:column}
.step+.step::before{content:"";position:absolute;left:-22px;top:118px;width:16px;height:16px;
  background:no-repeat center/16px url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238EB7F3' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M9.5 6l6 6-6 6'/%3E%3C/svg%3E")}
.stage{height:236px;border-radius:var(--r-m);display:grid;place-items:center;position:relative;overflow:hidden;
  background:
    radial-gradient(70% 80% at 50% 0%,rgba(30,111,232,.10),rgba(30,111,232,0) 70%),
    linear-gradient(rgba(15,56,116,.045) 1px,transparent 1px) 0 0/24px 24px,
    linear-gradient(90deg,rgba(15,56,116,.045) 1px,transparent 1px) 0 0/24px 24px,
    #F3F7FD}
.step-txt{padding:22px 18px 0}
.step-txt .no{display:inline-grid;place-items:center;width:26px;height:26px;border-radius:var(--r-m);background:var(--brand-7);color:#fff;font-size:14px;font-weight:700}
.step-txt h3{display:inline;margin-left:10px;font-size:19px;line-height:26px;font-weight:700;vertical-align:top}
.step-txt p{margin-top:10px;font-size:14px;line-height:1.8;color:var(--text-2)}

/* 小窗口示意 */
.mini{background:#fff;border-radius:var(--r-l);box-shadow:0 0 0 1px rgba(15,56,116,.05),0 12px 32px rgba(15,35,80,.12),0 2px 6px rgba(15,35,80,.06);font-size:12px;line-height:1.5}
.m-login{width:192px;padding:10px 16px 12px;display:flex;flex-direction:column;align-items:center}
.m-bar{align-self:stretch;display:flex;align-items:center;gap:6px;font-size:11px;font-weight:600;color:var(--text-2);padding-bottom:10px;border-bottom:1px solid var(--split)}
.m-bar .logo{width:14px;height:14px}
.m-qr{position:relative;width:86px;height:86px;margin-top:12px;padding:6px;border-radius:var(--r-m);box-shadow:0 0 0 1px var(--split)}
.m-qr>svg{width:100%;height:100%;display:block}
.m-qr span{position:absolute;left:50%;top:50%;width:24px;height:24px;margin:-12px 0 0 -12px;padding:2px;background:#fff;border-radius:6px}
.m-qr span svg{width:100%;height:100%;display:block}
.m-t{margin-top:10px;font-size:14px;font-weight:700}
.m-s{display:flex;align-items:center;gap:4px;margin-top:2px;color:var(--text-2);font-size:11px}
.m-s .i{width:13px;height:13px;color:var(--wx)}
.m-home{width:236px;padding:16px 18px 18px;display:flex;flex-direction:column}
.m-home small{font-size:11px;color:var(--text-3)}
.m-code{display:flex;align-items:center;gap:8px;font-size:26px;line-height:1.3;font-weight:600;letter-spacing:.02em;margin:2px 0 10px}
.m-code .i{width:15px;height:15px;color:var(--text-3)}
.m-pw{display:flex;align-items:center;gap:8px;font-size:17px;font-weight:600;letter-spacing:.06em;margin:0 0 14px}
.m-pw .i{width:14px;height:14px;color:var(--text-3)}
.m-pw .i:first-of-type{margin-left:4px}
.m-conn{width:258px;padding:16px 16px 16px;display:flex;flex-direction:column}
.m-h{font-size:14px;font-weight:700}
.m-inp-row{display:flex;gap:8px;margin-top:12px}
.m-inp{flex:1;min-width:0;height:32px;display:flex;align-items:center;gap:6px;padding:0 10px;border-radius:var(--r-m);
       box-shadow:inset 0 0 0 1.5px var(--brand-7),0 0 0 3px rgba(30,111,232,.14);font-size:14px;font-weight:600}
.m-inp .i{width:14px;height:14px;color:var(--text-3)}
.caret{width:1.5px;height:16px;background:var(--text-1);animation:blink 1.1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
.m-conn .btn.sm{height:32px;padding:0 14px}
.m-toast{margin-top:12px;display:flex;align-items:center;gap:6px;padding:8px 10px;border-radius:var(--r-m);background:var(--ok-1);color:var(--ok-ink);font-size:12px}
.m-toast .i{width:14px;height:14px}

/* ---------- 远程窗口示意 ---------- */
.rw{max-width:1000px;margin:56px auto 0;border-radius:var(--r-win);overflow:hidden;background:var(--d-win);box-shadow:var(--sh-win)}
.rw-bar{height:38px;display:flex;align-items:center;gap:2px;padding-left:12px;background:var(--d-bar);color:var(--d-2);font-size:12px}
.rw-logo{width:18px;height:18px;margin-right:8px;flex-shrink:0}
.rw-tab{height:28px;display:flex;align-items:center;gap:8px;padding:0 6px 0 10px;border-radius:var(--r-m);white-space:nowrap}
.rw-tab .i{width:13px;height:13px}
.rw-tab .x{width:12px;height:12px;margin-left:6px;color:var(--d-3);stroke-width:2}
.rw-tab.on{background:var(--d-tab);color:var(--d-1)}
.rw-add{width:28px;height:28px;display:grid;place-items:center}
.rw-add .i{width:15px;height:15px}
.rw-wc{margin-left:auto;display:flex;height:38px}
.rw-wc span{width:46px;display:grid;place-items:center}
.rw-wc .i{width:15px;height:15px;stroke-width:1.3}
.rw-view{position:relative;aspect-ratio:16/8.4;overflow:hidden;
  background:radial-gradient(70% 90% at 80% 100%,rgba(108,160,240,.85),rgba(108,160,240,0) 62%),
             radial-gradient(55% 70% at 10% 6%,rgba(132,112,226,.5),rgba(132,112,226,0) 60%),
             linear-gradient(155deg,#16244D 0%,#1D3A80 48%,#2A5CC0 100%)}
.tb{position:absolute;top:12px;left:50%;transform:translateX(-50%);z-index:5;display:flex;align-items:center;gap:2px;height:44px;padding:0 6px 0 4px;
    white-space:nowrap;background:var(--d-tool);border-radius:var(--r-l);box-shadow:0 12px 32px rgba(0,0,0,.3),0 0 0 1px rgba(255,255,255,.06);color:var(--d-1)}
.tb-grip{width:14px;display:grid;place-items:center;color:var(--d-3);margin-right:2px}
.tb-grip .i{width:14px;height:14px}
.tb-net{display:inline-flex;align-items:center;gap:7px;height:28px;padding:0 10px;margin-right:2px;border-radius:var(--r-m);background:rgba(255,255,255,.06);font-size:12px;color:var(--d-2)}
.dot{width:7px;height:7px;border-radius:50%;background:var(--live);box-shadow:0 0 0 3px rgba(60,196,138,.2);flex-shrink:0}
.tb-vd{width:1px;height:20px;background:var(--d-line);margin:0 6px}
.tbb{height:32px;padding:0 9px;border-radius:var(--r-m);display:inline-flex;align-items:center;gap:6px;color:rgba(255,255,255,.85);font-size:13px}
.tbb .i{width:18px;height:18px}
.tbb.on{background:rgba(255,255,255,.14);color:#fff}
.tbb.ico{padding:0;width:32px;justify-content:center}
.tb-end{height:28px;padding:0 12px;margin-left:4px;border-radius:var(--r-m);background:var(--err);color:#fff;font-size:13px;display:inline-flex;align-items:center}

.app{position:absolute;left:6%;top:19%;width:60%;height:64%;background:#fff;border-radius:var(--r-win);overflow:hidden;
     box-shadow:0 20px 50px rgba(0,0,0,.35);display:flex;flex-direction:column}
.app-bar{height:30px;flex-shrink:0;display:flex;align-items:center;gap:6px;padding:0 12px;background:#F3F4F6;font-size:12px;color:var(--text-2)}
.app-bar i{width:9px;height:9px;border-radius:50%;background:#D8DBE1}
.app-bar span{margin-left:8px}
.app-body{flex:1;display:flex;min-height:0}
.app-side{width:22%;background:var(--panel);padding:14px 12px;display:grid;align-content:start;gap:10px}
.app-side i{display:block;height:8px;border-radius:4px;background:#E3E7EE}
.app-main{flex:1;padding:16px 18px;display:grid;grid-template-columns:1.25fr 1fr;gap:16px;min-width:0}
.sheet{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:#E8EBF0;align-self:start;border:1px solid #E8EBF0;border-radius:4px;overflow:hidden}
.sheet span{height:22px;background:#fff}
.sheet span:nth-child(-n+4){background:#F3F5F8}
.sheet span.hl{background:var(--brand-1);box-shadow:inset 0 0 0 1.5px var(--brand-6)}
.chart{display:flex;align-items:flex-end;gap:8%;padding:10px 8% 0;border-bottom:1px solid #E8EBF0;height:70%;align-self:start}
.chart i{flex:1;border-radius:3px 3px 0 0;background:linear-gradient(var(--brand-5),var(--brand-3))}
.chart i:nth-child(6){background:linear-gradient(#F5B36B,#F2D3A8)}
.cursor{position:absolute;left:47%;top:46%;width:20px;height:20px;fill:#fff;stroke:#111;stroke-width:1.4;stroke-linejoin:round;filter:drop-shadow(0 1px 1px rgba(0,0,0,.35))}

.xfer{position:absolute;right:5%;bottom:calc(40px + 7%);width:290px;background:#fff;border-radius:var(--r-l);box-shadow:0 16px 40px rgba(0,0,0,.3);padding:12px 14px 6px;font-size:12px;z-index:3}
.xf-h{display:flex;align-items:center;gap:6px;font-weight:600;color:var(--text-1);padding-bottom:8px;border-bottom:1px solid var(--split)}
.xf-h .i{width:15px;height:15px;color:var(--brand-7)}
.xf-h .num{margin-left:auto;font-weight:400;color:var(--text-3)}
.xf-row{display:flex;align-items:center;gap:10px;padding:10px 0}
.xf-row+.xf-row{border-top:1px solid var(--split)}
.fic{width:30px;height:34px;flex-shrink:0;border-radius:4px;background:#FFF0ED;color:var(--err);font:700 9px/34px var(--num);text-align:center}
.fic.img{background:var(--brand-1);color:var(--brand-7)}
.xf-t{flex:1;min-width:0;display:flex;flex-direction:column;gap:5px;line-height:1.3}
.xf-t b{font-weight:500;color:var(--text-1);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.xf-t small{color:var(--text-3);font-size:11px}
.bar{display:block;height:4px;border-radius:2px;background:#E4E6EA;overflow:hidden}
.bar i{display:block;height:100%;border-radius:2px;background:var(--brand-7)}
.xf-p{color:var(--text-2);width:30px;text-align:right}
.xf-row .ok{width:16px;height:16px;color:var(--ok)}

.taskbar{position:absolute;left:0;right:0;bottom:0;height:40px;background:rgba(240,242,246,.9);display:flex;align-items:center;justify-content:center;gap:4px;box-shadow:0 -1px 0 rgba(255,255,255,.35)}
.tk{width:32px;height:32px;border-radius:var(--r-m);display:grid;place-items:center;position:relative;color:#fff}
.tk.win{color:#2B78E4}
.tk.win .i{width:18px;height:18px}
.tk.on{background:rgba(255,255,255,.75)}
.tk.on::after{content:"";position:absolute;bottom:2px;left:50%;width:12px;height:3px;margin-left:-6px;border-radius:2px;background:var(--brand-7)}
.tk b{width:22px;height:22px;border-radius:6px;display:grid;place-items:center}
.tk b .i{width:14px;height:14px;stroke-width:2}
.tk .logo{width:20px;height:20px}
.tray{position:absolute;right:14px;top:0;bottom:0;display:flex;align-items:center;font-size:11px;line-height:15px;text-align:right;color:var(--text-1)}

/* 功能卡片 */
.feats{margin-top:72px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.feat{background:var(--panel);border-radius:var(--r-l);padding:28px 28px 30px;box-shadow:inset 0 0 0 1px rgba(0,0,0,.035);transition:background-color .2s,box-shadow .2s}
.feat:hover{background:#fff;box-shadow:var(--sh-card)}
.feat h3{margin-top:18px;font-size:18px;line-height:1.4;font-weight:700}
.feat p{margin-top:8px;font-size:14px;line-height:1.8;color:var(--text-2)}

/* ---------- 安全 ---------- */
.sec-split{display:grid;grid-template-columns:minmax(0,440px) minmax(0,1fr);gap:72px;align-items:center}
.split-copy h2{margin-top:16px;font-size:38px;line-height:1.3;font-weight:800;color:#0F1A2E}
.split-lead{margin-top:14px;font-size:16px;color:var(--text-2)}
.sec-list{margin-top:32px;display:grid;gap:22px}
.sec-list li{display:flex;gap:16px;align-items:flex-start;font-size:14px;line-height:1.75;color:var(--text-2)}
.sec-list b{display:block;font-size:16px;line-height:1.5;color:var(--text-1);font-weight:700;margin-bottom:2px}
.desk{position:relative}
.desk-view{position:relative;aspect-ratio:4/3.05;border-radius:var(--r-l);overflow:hidden;box-shadow:var(--sh-win);
  background:radial-gradient(70% 90% at 80% 100%,rgba(108,160,240,.85),rgba(108,160,240,0) 62%),
             radial-gradient(55% 70% at 10% 6%,rgba(132,112,226,.5),rgba(132,112,226,0) 60%),
             linear-gradient(155deg,#16244D 0%,#1D3A80 48%,#2A5CC0 100%)}
.desk figcaption{margin-top:16px;text-align:center;font-size:13px;color:rgba(0,0,0,.55)}
.browser{position:absolute;left:6%;top:6%;width:80%;height:58%;background:#fff;border-radius:var(--r-win);overflow:hidden;box-shadow:0 20px 50px rgba(0,0,0,.3);font-size:12px;color:var(--text-2)}
.br-tabs{height:32px;background:#EEF0F3;display:flex;align-items:flex-end;gap:2px;padding:0 10px}
.br-tabs span{height:26px;display:flex;align-items:center;gap:6px;padding:0 12px;border-radius:6px 6px 0 0;white-space:nowrap}
.br-tabs span.on{background:#fff;color:var(--text-1)}
.br-tabs .i{width:12px;height:12px}
.br-addr{height:30px;display:flex;align-items:center;gap:6px;margin:0;padding:0 14px;border-bottom:1px solid #EEE;font-size:11px;color:var(--text-3)}
.br-addr .i{width:12px;height:12px}
.br-body{padding:16px 18px;display:grid;gap:11px}
.br-body i{display:block;height:8px;border-radius:4px;background:#E6E9EF}
.sc{position:absolute;right:4%;bottom:calc(40px + 4%);width:300px;max-width:88%;background:var(--d-tool);color:var(--d-1);border-radius:var(--r-l);
    box-shadow:0 16px 40px rgba(0,0,0,.35),0 0 0 1px rgba(255,255,255,.07);z-index:3}
.sc-h{height:36px;display:flex;align-items:center;gap:8px;padding:0 10px 0 14px;font-size:12px;color:var(--d-2)}
.sc-h .sp{flex:1}
.sc-h .i{width:15px;height:15px;color:var(--d-3)}
.sc-b{display:flex;align-items:center;gap:12px;padding:2px 14px 12px}
.av{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;flex-shrink:0;background:linear-gradient(135deg,#F5B36B,#E37318);color:#fff;font-size:15px;font-weight:600}
.sc-who{display:flex;flex-direction:column;min-width:0;line-height:1.45}
.sc-who b{font-size:15px;font-weight:600}
.sc-who small{font-size:12px;color:var(--d-2);white-space:nowrap}
.sc-tm{margin-left:auto;font-size:13px;color:var(--d-2)}
.sc-a{display:flex;gap:6px;padding:10px 12px 12px;border-top:1px solid var(--d-line)}
.bb{flex:1;height:32px;border-radius:var(--r-m);display:inline-flex;align-items:center;justify-content:center;gap:6px;background:rgba(255,255,255,.08);color:rgba(255,255,255,.88);font-size:12px;white-space:nowrap}
.bb .i{width:15px;height:15px}
.bb.end{background:var(--err);color:#fff}

/* ---------- 工作原理 ---------- */
.arch{max-width:1120px;margin:56px auto 0}
.arch svg{display:block;width:100%;height:auto;font-family:var(--font);overflow:visible}
.arch .arch-n{display:none;max-width:440px;margin:0 auto}
.a-clu{fill:var(--brand-1);stroke:var(--brand-4);stroke-width:1.5;stroke-dasharray:6 5}
.a-card{fill:#fff;stroke:rgba(15,56,116,.10)}
.a-dev{fill:#fff;stroke:rgba(15,56,116,.12);filter:drop-shadow(0 8px 18px rgba(16,24,40,.08))}
.a-pill{fill:var(--brand-2)}
.a-pt{font-size:12px;font-weight:600;fill:var(--brand-8)}
.a-tile{fill:var(--brand-1)}
.a-tile.gray{fill:#F0F2F5}
.a-tile.orange{fill:#FFF1E4}
.a-ic{fill:none;stroke:var(--brand-7);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.a-ic.gray{stroke:var(--text-2)}
.a-ic.orange{stroke:#D9731A}
.a-ic.green{stroke:var(--ok-ink);stroke-width:2.2}
.a-ic.sm{stroke-width:2.6}
.a-h{font-size:16px;font-weight:700;fill:#0F1A2E}
.a-t{font-size:15px;font-weight:700;fill:var(--text-1)}
.a-s{font-size:13px;fill:var(--text-2)}
.a-s.sm{font-size:12px}
.a-k{font-size:12px;fill:rgba(0,0,0,.55)}
.a-n{font-family:var(--num);font-size:22px;font-weight:600;letter-spacing:.02em;fill:var(--text-1)}
.a-n.sm{font-size:18px}
.a-div{stroke:var(--split)}
.a-live{fill:var(--live)}
.ln{fill:none;stroke-linecap:round;stroke-linejoin:round}
.ln.acc{stroke:#A3ABB8;stroke-width:2;stroke-dasharray:.5 6}
.ln.sig{stroke:var(--brand-6);stroke-width:2}
.ln.rel{stroke:#E8892E;stroke-width:2;stroke-dasharray:7 6;stroke-linecap:butt}
.ln.dir{stroke:var(--ok);stroke-width:3.5}
.dt.acc{fill:#A3ABB8}
.dt.sig{fill:var(--brand-6)}
.dt.rel{fill:#E8892E}
.a-lock{fill:#fff;stroke:#E8892E;stroke-width:1.5}
.a-dpill{fill:#fff;stroke:var(--ok);stroke-width:1.5}
.a-dt{font-size:15px;font-weight:700;fill:var(--ok-ink)}
.a-dt.sm{font-size:14px}
.arch-legend{margin-top:28px;display:flex;flex-wrap:wrap;justify-content:center;gap:10px 28px;font-size:13px;line-height:1.5;color:var(--text-2)}
.arch-legend li{display:flex;align-items:center;gap:8px}
.sw{display:block;width:26px;height:0;flex-shrink:0;border-top:2px solid var(--brand-6)}
.sw.dir{border-top:3.5px solid var(--ok)}
.sw.rel{border-top:2px dashed #E8892E}
.sw.acc{border-top:2.5px dotted #A3ABB8}
.flow{margin-top:48px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.flow li{background:var(--panel);border-radius:var(--r-l);padding:24px 22px 26px;box-shadow:inset 0 0 0 1px rgba(0,0,0,.035)}
.flow .no{display:inline-grid;place-items:center;width:26px;height:26px;border-radius:var(--r-m);background:var(--brand-7);color:#fff;font-size:14px;font-weight:700;vertical-align:top}
.flow h3{display:inline;margin-left:10px;font-size:17px;line-height:26px;font-weight:700;vertical-align:top}
.flow p{margin-top:10px;font-size:14px;line-height:1.8;color:var(--text-2)}
.arch-notes{margin-top:20px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px 48px;padding:32px 36px;border-radius:var(--r-l);
  background:linear-gradient(180deg,#F3F7FD,#F7F9FD);box-shadow:inset 0 0 0 1px rgba(30,111,232,.08)}
.arch-notes li{display:flex;gap:16px;align-items:flex-start;font-size:14px;line-height:1.75;color:var(--text-2)}
.arch-notes b{display:block;font-size:16px;line-height:1.5;color:var(--text-1);font-weight:700;margin-bottom:2px}
.arch-notes .tile{background:#fff;box-shadow:0 0 0 1px rgba(30,111,232,.08)}

/* ---------- 常见问题 ---------- */
.faq-wrap{max-width:880px}
.faq{margin-top:48px;border-radius:var(--r-l);background:#fff;box-shadow:var(--sh-card)}
.faq details{border-top:1px solid var(--split)}
.faq details:first-child{border-top:0}
.faq summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:16px;padding:22px 28px;font-size:17px;font-weight:600;color:var(--text-1)}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{color:var(--brand-8)}
.faq summary .i{margin-left:auto;width:18px;height:18px;color:var(--text-3);transition:transform .2s}
.faq details[open] summary .i{transform:rotate(180deg);color:var(--brand-7)}
.faq details p{padding:0 72px 24px 28px;margin-top:-6px;font-size:15px;line-height:1.85;color:var(--text-2)}
.faq summary:focus-visible{outline-offset:-2px}
.faq details p a{color:var(--brand-8);text-decoration:underline;text-decoration-color:rgba(26,94,197,.35);text-underline-offset:3px}
.faq details p a:hover{text-decoration-color:currentColor}

/* ---------- 收尾 ---------- */
.cta-sec{padding:0 0 96px}
.cta{position:relative;overflow:hidden;isolation:isolate;display:flex;align-items:center;gap:32px;padding:48px 56px;border-radius:var(--r-l);color:#fff;
     background:radial-gradient(60% 120% at 100% 0%,rgba(98,154,239,.55),rgba(98,154,239,0) 70%),linear-gradient(120deg,#1A5EC5 0%,#1E6FE8 60%,#4085EB 100%);
     box-shadow:0 20px 50px rgba(30,111,232,.25)}
.cta-deco{position:absolute;right:-60px;top:50%;width:360px;height:360px;margin-top:-180px;color:rgba(255,255,255,.08);z-index:-1}
.cta-copy h2{font-size:32px;line-height:1.35;font-weight:800}
.cta-copy p{margin-top:8px;font-size:16px;color:rgba(255,255,255,.82)}
.cta-act{margin-left:auto;display:flex;flex-direction:column;align-items:center;gap:10px;flex-shrink:0}
.cta-meta{font-size:13px;color:rgba(255,255,255,.8)}

/* ---------- 页脚 ---------- */
.foot{background:#fff;border-top:1px solid var(--split)}
.foot-in{display:flex;align-items:center;justify-content:space-between;gap:16px;height:84px}
.brand.sm{font-size:15px;gap:8px}
.brand.sm .logo{width:22px;height:22px}
.foot p{font-size:13px;color:rgba(0,0,0,.55)}
.foot .sep{margin:0 10px;color:var(--text-4)}
.foot a:not(.brand){color:rgba(0,0,0,.55);text-decoration:underline;text-decoration-color:rgba(0,0,0,.2);text-underline-offset:3px}
.foot a:not(.brand):hover{color:var(--brand-8);text-decoration-color:currentColor}
.foot a{white-space:nowrap}

/* ---------- 响应式 ---------- */
@media (max-width:1180px){
  .br-d{display:none}
  .hero-in{grid-template-columns:minmax(0,1fr) 380px;gap:48px}
  .hero h1{font-size:50px}
  .sec-split{gap:48px}
  .flow{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:960px){
  .wrap{padding:0 24px}
  .hero{padding:64px 0 80px}
  .hero-in{grid-template-columns:minmax(0,1fr);gap:48px}
  .dl-card{max-width:520px;width:100%}
  .steps{grid-template-columns:minmax(0,1fr);max-width:520px;margin-left:auto;margin-right:auto;gap:20px}
  .step+.step::before{display:none}
  .feats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .feat:last-child:nth-child(odd){grid-column:1/-1}
  .sec-split{grid-template-columns:minmax(0,1fr)}
  .split-copy{max-width:600px}
  .xfer{width:250px}
  .arch .arch-w{display:none}
  .arch .arch-n{display:block}
  .arch{margin-top:40px}
}
@media (max-width:720px){
  .nav-links{display:none}
  .arch-notes{grid-template-columns:minmax(0,1fr);gap:20px}
  .tb .lbl{display:none}
  .tb-net{padding:0 9px}
  .tb-net .dot{margin:0}
  .rw-wc span{width:36px}
  .xfer{display:none}
  .app{left:5%;top:24%;width:90%;height:58%}
  .cta{flex-direction:column;align-items:flex-start;padding:40px 32px}
  .cta-act{margin-left:0;align-items:flex-start}
}
@media (max-width:600px){
  :root{--nav-h:56px}
  body{font-size:15px}
  .wrap{padding:0 16px}
  .brand{font-size:16px}
  .nav-btn{height:32px;padding:0 12px;font-size:13px}
  .nav-btn .i{width:15px;height:15px}
  .hero{padding:40px 0 56px}
  .hero h1{margin-top:18px;font-size:36px;line-height:1.25}
  .lead{margin-top:16px;font-size:15px;line-height:1.8}
  .facts{margin-top:28px;gap:16px}
  .facts li{flex-direction:column;align-items:flex-start;gap:8px;padding-left:14px}
  .facts b{width:auto;font-size:15px}
  .chip{height:28px;padding:0 10px;font-size:12px}
  .dl-card{padding:24px 20px 20px}
  .dl-card h2{font-size:21px}
  .sec{padding:64px 0}
  .cta-sec{padding:0 0 64px}
  .sec-start{padding-top:24px}
  .sec-head h2,.split-copy h2{font-size:28px}
  .sec-head p{font-size:15px}
  .steps{margin-top:36px}
  .stage{height:220px}
  .step-txt{padding:18px 10px 0}
  .rw{margin-top:36px;border-radius:6px}
  .rw-bar{height:32px;padding-left:10px}
  .rw-tab{height:24px}
  .rw-wc{height:32px}
  .rw-wc span{width:30px}
  .rw-view{aspect-ratio:4/3.3}
  .tb{top:8px;height:38px;padding:0 4px;gap:0}
  .tb-grip{display:none}
  .tbb{height:30px;padding:0 7px}
  .tbb .i{width:16px;height:16px}
  .tb-vd{margin:0 4px}
  .tb-end{height:26px;padding:0 10px;font-size:12px}
  .hide-s{display:none!important}
  .app{top:22%;height:56%}
  .app-side{display:none}
  .app-main{grid-template-columns:minmax(0,1fr);padding:12px}
  .chart{display:none}
  .taskbar{height:34px}
  .tk{width:28px;height:28px}
  .tray{display:none}
  .feats{grid-template-columns:minmax(0,1fr);margin-top:40px;gap:12px}
  .feat{padding:22px 20px;display:grid;grid-template-columns:40px minmax(0,1fr);column-gap:16px}
  .feat .tile{grid-row:span 2}
  .feat h3{margin-top:0;font-size:17px}
  .feat p{margin-top:4px}
  .sec-list{margin-top:24px;gap:18px}
  .desk-view{aspect-ratio:4/4.2}
  .browser{left:5%;top:5%;width:90%;height:40%}
  .sc{right:3%;bottom:calc(34px + 4%);width:auto;left:3%;max-width:none}
  .faq{margin-top:32px}
  .faq summary{padding:18px 20px;font-size:16px}
  .faq details p{padding:0 20px 20px;font-size:14px}
  .cta{padding:32px 24px}
  .cta-copy h2{font-size:24px}
  .cta-copy p{font-size:14px}
  .cta-act{align-self:stretch;align-items:stretch}
  .cta-act .btn{width:100%}
  .cta-meta{text-align:center}
  .arch{margin-top:32px}
  .arch-legend{justify-content:flex-start;gap:8px 20px;margin-top:20px;padding:0 4px}
  .flow{grid-template-columns:minmax(0,1fr);margin-top:32px;gap:12px}
  .flow li{padding:20px}
  .arch-notes{padding:24px 20px;margin-top:12px}
  .foot-in{flex-direction:column;justify-content:center;height:auto;padding:24px 16px;gap:10px}
  .foot p{text-align:center;line-height:1.9}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .caret{animation:none}
  *{transition:none!important}
}

/* 常见问题下面的“使用说明”入口（手机上导航链接隐藏，这里一直显示） */
.faq-more{margin-top:24px;text-align:center;font-size:15px;color:var(--text-2)}
.faq-more a{margin-left:4px;color:var(--brand-8);font-weight:600;text-decoration:underline;text-decoration-color:rgba(26,94,197,.35);text-underline-offset:3px}
.faq-more a:hover{text-decoration-color:currentColor}