/* ==========================================================================
   style.css v6 — 磨砂玻璃浅色主题（Frosted Glass Light）
   严格按用户确认小样 preview-bg/a9-frosted-glass.html：
   - 基底：冷银蓝渐变（165deg #cfd9e8 → #dde4ef → #c9d3e4），明确不是纯白
   - 卡片：磨砂玻璃统一语言（见 --card）
   - 按钮：Liquid Glass 胶囊三件套（主/次/幽灵），全 999px 胶囊，glossy 高光
   布局/尺寸/选择器与 v5 完全一致，只换颜色与质感。零 HTML 改动。
   ========================================================================== */
:root{
  --bg:#dbe2ee; --bg2:#ccd5e4;
  --card:linear-gradient(150deg,rgba(255,255,255,.52),rgba(255,255,255,.28) 55%,rgba(210,225,245,.38));
  --card-solid:rgba(255,255,255,.66); /* @supports fallback 用 */
  --line:rgba(20,40,80,.10); --line-hi:rgba(20,40,80,.22);
  --txt:#0b1322; --mut:#4d5c78; --dim:#7d8aa3;
  --acc1:#d84f9e; --acc2:#0a9fe0; --acc3:#6f63ee;
  --grad:linear-gradient(100deg,#4a5cf5 0%,#7a5cf5 100%);            /* 按钮/装饰 */
  --grad-text:linear-gradient(100deg,#0a9fe0 0%,#6f63ee 50%,#d84f9e 100%); /* 关键词渐变字 */
  --glass-shadow:0 24px 60px rgba(90,120,170,.28),inset 0 1px 0 rgba(255,255,255,.9);
  --r:20px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;background:#dbe2ee;overflow-x:clip} /* RTL 移动端横向溢出会导致整页视觉右偏（2026-10-07 实测：docSW=698），html+body 双保险 */
body{
  background:linear-gradient(165deg,#cfd9e8 0%,#dde4ef 45%,#c9d3e4 100%);
  background-attachment:fixed;
  color:var(--txt);
  font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Roboto,"Helvetica Neue",Arial,sans-serif;
  line-height:1.7;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden}
body::before{content:"";position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:radial-gradient(85% 46% at 50% 0%,rgba(255,255,255,.55),rgba(255,255,255,0) 100%)}
body::after{content:none}
::selection{background:rgba(10,159,224,.28);color:var(--txt)}
a{color:inherit;text-decoration:none}
.wrap{max-width:1180px;margin:0 auto;padding:0 28px}
/* nav — 磨砂玻璃 */
nav{position:fixed;top:0;left:0;right:0;z-index:50;background:rgba(255,255,255,.62);border-bottom:1px solid rgba(255,255,255,.7);box-shadow:0 8px 28px rgba(90,120,170,.14)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{font-weight:800;font-size:20px;letter-spacing:-.2px;color:var(--txt)}
.logo b{background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent}
.nav-links{display:flex;gap:30px;font-size:15px;color:var(--mut);font-weight:500}
.nav-links a{position:relative;transition:color .2s}
.nav-links a:hover{color:var(--txt)}
.nav-links a::after{content:"";position:absolute;left:0;bottom:-6px;height:2px;width:0;background:var(--grad);border-radius:2px;transition:width .25s}
.nav-links a:hover::after{width:100%}

/* ============ Liquid Glass 胶囊按钮三件套 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:16px 34px;border-radius:999px;font-weight:700;font-size:15.5px;
  color:#fff;border:1px solid rgba(255,255,255,.45);cursor:pointer;
  background:
    linear-gradient(180deg,rgba(255,255,255,.30) 0%,rgba(255,255,255,.07) 42%,rgba(255,255,255,0) 58%),
    linear-gradient(180deg,#5b6df8 0%,#4a5cf5 48%,#7a5cf5 100%);
  box-shadow:0 14px 34px rgba(88,101,245,.42),0 3px 10px rgba(88,101,245,.25),
    inset 0 1px 0 rgba(255,255,255,.65),inset 0 -3px 8px rgba(35,35,110,.22);
  text-shadow:0 1px 2px rgba(30,30,90,.28);
  transition:transform .2s cubic-bezier(.2,.7,.3,1.2),box-shadow .25s;position:relative}
.btn::before{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;
  background:linear-gradient(110deg,transparent 30%,rgba(255,255,255,.35) 50%,transparent 70%);
  transform:translateX(-110%);transition:transform .6s}
.btn:hover{transform:translateY(-2px);
  box-shadow:0 20px 46px rgba(88,101,245,.55),0 6px 16px rgba(88,101,245,.30),
  inset 0 1px 0 rgba(255,255,255,.65),inset 0 -3px 8px rgba(35,35,110,.22)}
.btn:hover::before{transform:translateX(110%)}
.btn:active{transform:translateY(0)}
/* 次按钮：薄荷→青，深色字 */
.btn.secondary{color:#07333f;border:1px solid rgba(255,255,255,.55);text-shadow:0 1px 0 rgba(255,255,255,.35);
  background:
    linear-gradient(180deg,rgba(255,255,255,.32) 0%,rgba(255,255,255,.08) 42%,rgba(255,255,255,0) 58%),
    linear-gradient(180deg,#6ff0d8 0%,#5eead4 48%,#38bdf8 100%);
  box-shadow:0 14px 32px rgba(56,189,248,.38),0 3px 10px rgba(56,189,248,.22),
    inset 0 1px 0 rgba(255,255,255,.7),inset 0 -3px 8px rgba(8,80,110,.16)}
.btn.secondary:hover{box-shadow:0 20px 44px rgba(56,189,248,.50),0 6px 16px rgba(56,189,248,.28),
  inset 0 1px 0 rgba(255,255,255,.7),inset 0 -3px 8px rgba(8,80,110,.16)}
/* 幽灵按钮：磨砂玻璃胶囊 */
.btn.ghost{color:var(--txt);text-shadow:none;
  background:linear-gradient(150deg,rgba(255,255,255,.60),rgba(255,255,255,.32) 60%,rgba(215,228,248,.42));

  border:1px solid rgba(255,255,255,.85);
  box-shadow:0 10px 26px rgba(90,120,170,.22),inset 0 1px 0 rgba(255,255,255,.95),inset 0 -2px 6px rgba(120,150,200,.12)}
.btn.ghost::before{display:none}
.btn.ghost:hover{border-color:#fff;transform:translateY(-2px);
  background:linear-gradient(150deg,rgba(255,255,255,.72),rgba(255,255,255,.42) 60%,rgba(215,228,248,.5));
  box-shadow:0 16px 36px rgba(90,120,170,.32),inset 0 1px 0 rgba(255,255,255,1)}
.burger{display:none;background:none;border:0;color:var(--txt);font-size:24px;cursor:pointer}

/* hero */
.hero{padding:170px 0 90px;position:relative}
.hero .kicker{display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:700;letter-spacing:2.5px;color:#0b7cb8;text-transform:uppercase;margin-bottom:22px;padding:9px 18px;border:1px solid rgba(10,159,224,.35);border-radius:999px;background:rgba(255,255,255,.55);box-shadow:inset 0 1px 0 rgba(255,255,255,.8)}
.hero .kicker::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--acc2);box-shadow:0 0 12px var(--acc2);animation:pulse 2.2s infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(.8)}}
.hero h1{font-size:clamp(40px,6.4vw,76px);line-height:1.06;font-weight:800;letter-spacing:-1.8px;max-width:900px;margin-bottom:8px;color:var(--txt)}
.hero h1 .rot{background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent;display:inline-block;min-width:5ch}
.hero p.sub{color:var(--mut);font-size:19.5px;max-width:680px;margin:26px 0 40px;line-height:1.75}
.hero p.sub b{color:var(--txt);font-weight:700}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap}
.hero-cta .btn{min-width:220px}
.hero-note{margin-top:24px;color:var(--dim);font-size:14.5px;display:flex;align-items:center;gap:8px}
.hero-note::before{content:"✓";color:var(--acc2);font-weight:800}
.hero-note b{color:#0b7cb8;font-weight:600}

/* trust band — 浅色玻璃带 */
.trust{border-top:1px solid rgba(255,255,255,.7);border-bottom:1px solid rgba(255,255,255,.7);background:rgba(255,255,255,.38);position:relative;z-index:1;box-shadow:0 10px 30px rgba(90,120,170,.12)}
.trust .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.tcell{padding:30px 26px;border-left:1px solid var(--line);font-size:14.5px;color:var(--mut);transition:background .25s}
.tcell:hover{background:rgba(255,255,255,.45)}
.tcell:first-child{border-left:0}
.tcell b{display:block;color:var(--txt);font-size:16px;margin-bottom:6px;letter-spacing:-.2px}

/* sections */
section{padding:110px 0;position:relative}
.sec-tag{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;letter-spacing:2.5px;text-transform:uppercase;color:#0b7cb8;margin-bottom:16px}
.sec-tag::before{content:"";width:22px;height:2px;background:var(--grad);border-radius:2px}
.sec-title{font-size:clamp(30px,4vw,46px);font-weight:800;letter-spacing:-1px;margin-bottom:16px;line-height:1.18;max-width:800px;color:var(--txt)}
.sec-sub{color:var(--mut);max-width:700px;margin-bottom:54px;font-size:17.5px;line-height:1.75}
.grid{display:grid;gap:22px}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}

/* 玻璃卡片（全站统一语言） */
.card{background:var(--card);
  border:1px solid rgba(255,255,255,.65);border-radius:var(--r);padding:34px;
  transition:transform .25s cubic-bezier(.2,.7,.3,1.2),border-color .25s,box-shadow .25s;
  position:relative;overflow:hidden;box-shadow:var(--glass-shadow)}
.card::before{content:"";position:absolute;top:0;left:10%;right:10%;height:1px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.9),transparent)}
.card:hover{transform:translateY(-6px);border-color:rgba(255,255,255,.9);box-shadow:0 30px 70px rgba(90,120,170,.38),inset 0 1px 0 rgba(255,255,255,1)}
.card .ico{margin-bottom:20px;color:#c2438b;width:52px;height:52px;display:flex;align-items:center;justify-content:center;border-radius:14px;background:rgba(216,79,158,.12);border:1px solid rgba(216,79,158,.35);box-shadow:inset 0 1px 0 rgba(255,255,255,.6)}
.ico svg{display:block}
.card h3{font-size:20px;margin-bottom:10px;letter-spacing:-.3px;color:var(--txt)}
.card p,.card li{color:var(--mut);font-size:15.5px;line-height:1.7}
.card ul{list-style:none;margin-top:16px}
.card li{padding:6px 0 6px 26px;position:relative}
.card li::before{content:"✓";position:absolute;left:0;color:var(--acc2);font-weight:700}
@supports not (border-bottom:1px solid rgba(255,255,255,.7);background:linear-gradient(180deg,rgba(255,255,255,.30),rgba(255,255,255,0) 40%)}
.pilot-box{background:var(--card);
  border:1px solid rgba(255,255,255,.7);border-radius:28px;padding:56px;display:grid;grid-template-columns:1.15fr 1fr;gap:56px;
  position:relative;overflow:hidden;box-shadow:var(--glass-shadow)}
.pilot-box::before{content:"";position:absolute;top:-100px;right:-100px;width:340px;height:340px;background:radial-gradient(circle,rgba(122,92,245,.20),rgba(122,92,245,0) 100%);pointer-events:none;/* drift removed for GPU */}
.pilot-box::after{content:"";position:absolute;bottom:-120px;left:-80px;width:300px;height:300px;background:radial-gradient(circle,rgba(10,159,224,.18),rgba(10,159,224,0) 100%);pointer-events:none}
@keyframes drift{from{transform:translate(0,0) scale(1)}to{transform:translate(-30px,24px) scale(1.12)}}
.pilot-price .from{font-size:13px;color:var(--mut);letter-spacing:2px;text-transform:uppercase;font-weight:700}
.pilot-price .amt{font-size:64px;font-weight:800;margin:8px 0;letter-spacing:-2px;background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent}
.pilot-price .per{color:var(--mut);font-size:15.5px}
.pilot-list{list-style:none;margin:26px 0}
.pilot-list li{padding:10px 0 10px 34px;position:relative;color:var(--txt);font-size:16px}
.pilot-list li::before{content:"→";position:absolute;left:0;color:var(--acc2);font-weight:800}
.pilot-list li span{color:var(--mut)}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;position:relative}
.step{background:var(--card);
  border:1px solid rgba(255,255,255,.65);border-radius:var(--r);padding:28px;position:relative;
  transition:transform .25s,border-color .25s,box-shadow .25s;box-shadow:var(--glass-shadow)}
.step:hover{transform:translateY(-4px);border-color:rgba(255,255,255,.9);box-shadow:0 30px 70px rgba(90,120,170,.38),inset 0 1px 0 rgba(255,255,255,1)}
.step .wk{font-size:12px;font-weight:800;letter-spacing:1.8px;color:#0b7cb8;text-transform:uppercase;margin-bottom:12px}
.step h3{font-size:18.5px;margin-bottom:10px;letter-spacing:-.2px;color:var(--txt)}
.step p{color:var(--mut);font-size:14.5px;line-height:1.7}

/* pricing */
.price-card{display:flex;flex-direction:column;background:var(--card);
  border:1px solid rgba(255,255,255,.65);border-radius:24px;padding:38px 34px;
  transition:transform .25s,box-shadow .25s,border-color .25s;box-shadow:var(--glass-shadow)}
.price-card:hover{transform:translateY(-6px);box-shadow:0 30px 70px rgba(90,120,170,.38),inset 0 1px 0 rgba(255,255,255,1)}
.price-card .tier{font-size:13px;font-weight:700;color:#0b7cb8;letter-spacing:2px;text-transform:uppercase}
.price-card .amt{font-size:44px;font-weight:800;margin:12px 0 6px;letter-spacing:-1.2px;color:var(--txt)}
.price-card .amt small{font-size:15px;color:var(--mut);font-weight:400;letter-spacing:0}
.price-card.hl{border:1px solid rgba(255,255,255,.85);background:linear-gradient(150deg,rgba(255,255,255,.62),rgba(255,255,255,.36) 55%,rgba(205,220,245,.45));position:relative;box-shadow:0 28px 70px rgba(88,101,245,.30),inset 0 1px 0 rgba(255,255,255,1)}
.price-card .flag{position:absolute;top:-14px;z-index:2;left:50%;transform:translateX(-50%);background:var(--grad);color:#fff;font-size:12px;font-weight:700;padding:5px 16px;border-radius:999px;white-space:nowrap;box-shadow:0 6px 18px rgba(88,101,245,.5),inset 0 1px 0 rgba(255,255,255,.5)}
.price-card ul{flex:1;list-style:none;margin-top:18px}
.price-card li{padding:7px 0 7px 26px;position:relative;color:var(--mut);font-size:15px}
.price-card li::before{content:"✓";position:absolute;left:0;color:var(--acc2);font-weight:700}
.price-card .btn{margin-top:28px;text-align:center;width:100%}

/* faq */
.faq{border-bottom:1px solid var(--line);transition:background .2s}
.faq:hover{background:rgba(255,255,255,.4)}
.faq button{width:100%;background:none;border:0;color:var(--txt);font-size:17.5px;font-weight:700;text-align:left;padding:24px 8px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;font-family:inherit;letter-spacing:-.2px}
.faq button span:last-child{color:var(--acc2);font-size:24px;flex:0 0 auto;transition:transform .3s;font-weight:300;line-height:1}
.faq.open button span:last-child{transform:rotate(45deg)}
.faq .a{color:var(--mut);font-size:16px;padding:0 8px;max-height:0;overflow:hidden;transition:max-height .35s ease;line-height:1.75}
.faq.open .a{max-height:420px;padding-bottom:26px}

/* contact */
.contact-box{background:var(--card);
  border:1px solid rgba(255,255,255,.7);border-radius:26px;padding:52px;display:grid;grid-template-columns:1fr 1fr;gap:52px;
  position:relative;overflow:hidden;box-shadow:var(--glass-shadow)}
.contact-box::before{content:"";position:absolute;top:0;left:10%;right:10%;height:1px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.9),transparent)}
.field{margin-bottom:18px}
.field label{display:block;font-size:13.5px;color:var(--mut);margin-bottom:8px;font-weight:600}
.field input,.field textarea,.field select{width:100%;background:rgba(255,255,255,.62);border:1px solid var(--line-hi);border-radius:12px;color:var(--txt);padding:14px 16px;font-size:15.5px;font-family:inherit;transition:border-color .2s,box-shadow .2s}
.field select{appearance:none;-webkit-appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%230a9fe0' stroke-width='2.5' stroke-linecap='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 16px center;padding-right:44px;cursor:pointer}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--acc2);box-shadow:0 0 0 3px rgba(10,159,224,.22)}
.contact-info h3{margin-bottom:16px;font-size:22px;letter-spacing:-.4px;color:var(--txt)}
.contact-info p{color:var(--mut);font-size:16px;margin-bottom:20px;line-height:1.75}
.wa-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:10px}
.nda{background:rgba(10,159,224,.10);border:1px solid rgba(10,159,224,.35);border-radius:16px;padding:20px 22px;margin-top:26px;font-size:15px;color:var(--mut);line-height:1.7;box-shadow:inset 0 1px 0 rgba(255,255,255,.6)}
.nda b{color:var(--txt)}

/* footer */
footer{border-top:1px solid rgba(255,255,255,.7);padding:56px 0 32px;color:var(--mut);font-size:14px;background:rgba(255,255,255,.30);overflow:hidden}
footer::before{content:'';position:absolute;inset:0;background:radial-gradient(120% 80% at 85% 120%,rgba(122,92,245,.14),rgba(122,92,245,0) 100%),radial-gradient(90% 70% at 0% 100%,rgba(10,159,224,.12),rgba(10,159,224,0) 100%);pointer-events:none}
.fbottom{border-top:1px solid var(--line);padding-top:24px;margin-top:8px}
.fbottom-inner{display:flex;flex-direction:column;align-items:center;text-align:center;gap:8px}
.fcopy{font-size:13.5px;color:var(--mut)}
.flinks{display:flex;align-items:center;gap:8px;font-size:13.5px}
.flinks a{color:var(--mut);text-decoration:none;transition:color .2s}
.flinks a:hover{color:var(--acc1)}
.fsep{color:var(--line);user-select:none}
.fprivacy{display:flex;align-items:flex-start;gap:8px;margin-top:16px;padding:14px 16px;background:rgba(10,159,224,.08);border:1px solid rgba(10,159,224,.20);border-radius:12px;font-size:13px;color:var(--mut);line-height:1.6}
.fprivacy svg{flex-shrink:0;margin-top:2px;color:var(--acc2)}
.flegal{margin-top:10px;padding:14px 16px;background:rgba(10,159,224,.06);border:1px solid rgba(10,159,224,.16);border-radius:12px;font-size:13px;color:var(--mut);line-height:1.6}
.flegal summary{cursor:pointer;font-weight:700;color:var(--txt);list-style:none;display:flex;align-items:center;gap:8px}
.flegal summary::-webkit-details-marker{display:none}
.flegal summary::before{content:"+";color:var(--acc2);font-weight:800;font-size:16px}
.flegal[open] summary::before{content:"−"}
.flegal div{margin-top:10px}
[dir="rtl"] .flegal{text-align:right}

/* v0-style footer */
.fcta{display:flex;justify-content:space-between;align-items:center;gap:24px;border:1px solid rgba(255,255,255,.7);border-radius:18px;
  background:var(--card);
  padding:28px 32px;margin:48px 0 48px;box-shadow:var(--glass-shadow)}
.fcta h3{font-size:24px;font-weight:700;letter-spacing:-.5px;color:var(--txt);margin-bottom:6px}
.fcta p{font-size:14px;color:var(--mut)}
.fcta .btn{flex-shrink:0}
.fgrid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1.2fr;gap:40px;margin-bottom:40px;position:relative}
.fbrand-row{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.fbrand-ico{width:40px;height:40px;border-radius:12px;background:var(--grad);display:flex;align-items:center;justify-content:center;box-shadow:0 8px 22px rgba(88,101,245,.45),inset 0 1px 0 rgba(255,255,255,.5)}
.fbrand-name{font-size:18px;font-weight:700;color:var(--txt)}
.fbrand-name em{font-style:normal;background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent}
.fdesc{font-size:13.5px;line-height:1.7;color:var(--mut);max-width:300px;margin-bottom:16px}
.fstatus{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:20px;padding:6px 14px;font-size:12px;color:var(--mut);background:rgba(255,255,255,.5)}
.fstatus .dot{width:8px;height:8px;border-radius:50%;background:#34d399;position:relative}
.fstatus .dot::after{content:'';position:absolute;inset:-4px;border-radius:50%;background:#34d399;opacity:.4;animation:ping 1.5s infinite}
@keyframes ping{0%{transform:scale(.6);opacity:.6}100%{transform:scale(1.4);opacity:0}}
.fcol h4{font-size:12px;font-weight:600;color:var(--dim);margin-bottom:16px;text-transform:uppercase;letter-spacing:2px}
.fcol a.flink{position:relative;display:inline-block;color:var(--mut);text-decoration:none;padding:4px 0;font-size:14px;transition:color .25s}
.fcol a.flink::after{content:'';position:absolute;bottom:2px;left:0;height:1px;width:0;background:var(--grad);transition:width .3s}
.fcol a.flink:hover{color:var(--txt)}
.fcol a.flink:hover::after{width:100%}
.fcontact-item{display:flex;align-items:center;gap:12px;padding:8px;border-radius:10px;color:var(--mut);text-decoration:none;font-size:14px;transition:background .2s}
.fcontact-item:hover{background:rgba(255,255,255,.55);color:var(--txt)}
.fcontact-ico{width:32px;height:32px;border-radius:8px;border:1px solid var(--line);background:rgba(216,79,158,.12);display:flex;align-items:center;justify-content:center;flex-shrink:0;color:#c2438b}
.fbottom{border-top:1px solid var(--line);padding-top:24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;align-items:center;font-size:12.5px;color:var(--mut);position:relative}
.fprivacy{margin-top:20px;padding:16px 20px;background:rgba(10,159,224,.07);border:1px solid rgba(10,159,224,.16);border-radius:12px;font-size:12.5px;line-height:1.7;color:var(--mut);position:relative}
@media(max-width:768px){.fcta{flex-direction:column;text-align:center;padding:24px}.fgrid{grid-template-columns:1fr 1fr;gap:28px}.fgrid>div:first-child{grid-column:1/-1}}
@media(max-width:480px){.fgrid{gap:24px}.fcta h3{font-size:20px}}

/* reveal */
.rv{opacity:0;transform:translateY(26px);transition:opacity .7s cubic-bezier(.2,.6,.3,1),transform .7s cubic-bezier(.2,.6,.3,1)}
.rv.on{opacity:1;transform:none}
/* demo polish */
#demoBox{border-radius:26px;overflow:hidden}
@media(max-width:900px){
  .g3,.g2{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr 1fr}
  .trust .wrap{grid-template-columns:1fr 1fr}
  .tcell:nth-child(3){border-left:0}
  .tcell{border-top:1px solid var(--line);padding:22px 18px}
  .tcell:nth-child(1),.tcell:nth-child(2){border-top:0}
  .pilot-box{grid-template-columns:1fr;padding:36px 28px;gap:36px}
  .contact-box{grid-template-columns:1fr;padding:34px 26px;gap:36px}
  .nav-links{display:none;position:absolute;top:68px;left:0;right:0;background:rgba(255,255,255,.94);flex-direction:column;padding:20px 28px;gap:16px;border-bottom:1px solid var(--line);box-shadow:0 20px 40px rgba(90,120,170,.25)}
  .nav-links.open{display:flex}
  .nav-cta{display:none}
  .nav-links .m-cta{display:inline-block!important;text-align:center;margin-top:8px}
  .burger{display:block}
  section{padding:72px 0}
  .hero{padding:140px 0 64px}
  .hero-cta{flex-direction:column;align-items:stretch}
  .hero-cta .btn{min-width:0;flex:none;width:100%} /* 移动端按钮纵向全宽：修复"Book a live demo"三行换行 bug */
  .card{padding:28px 24px}
}
[dir="rtl"] .card li,[dir="rtl"] .pilot-list li,[dir="rtl"] .price-card li{padding-left:0;padding-right:26px}
[dir="rtl"] .card li::before,[dir="rtl"] .pilot-list li::before,[dir="rtl"] .price-card li::before{left:auto;right:0}

/* language selector: custom dropdown with inline SVG flags */
.langsel{position:relative}
.langsel-btn{display:flex;align-items:center;gap:8px;background:rgba(255,255,255,.55);color:var(--txt);border:1px solid rgba(255,255,255,.8);border-radius:999px;padding:8px 12px;font-size:14px;cursor:pointer;font-family:inherit;max-width:172px;box-shadow:inset 0 1px 0 rgba(255,255,255,.9),0 4px 14px rgba(90,120,170,.16)}
.langsel-btn .flag{width:22px;height:15px;flex:none;display:block}
.langsel-btn .chev{opacity:.55;transition:transform .2s;flex:none}
.langsel[data-open] .chev{transform:rotate(180deg)}
.langsel-name{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.langsel-menu{position:absolute;top:calc(100% + 8px);inset-inline-end:0;min-width:184px;background:rgba(255,255,255,.88);border:1px solid rgba(255,255,255,.8);border-radius:12px;padding:6px;z-index:300;box-shadow:0 16px 40px rgba(90,120,170,.30)}
.langsel-menu a{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:8px;color:var(--txt);font-size:14px;text-decoration:none}
.langsel-menu a:hover{background:rgba(10,159,224,.10)}
.langsel-menu a.cur{color:#0b7cb8}
.langsel-menu .flag{width:22px;height:15px;flex:none;display:block}