/* LingoPier 宣传站 */
:root{
  --c:#1677ff;--c2:#4096ff;--c-d:#0958d9;--c-l:#e6f4ff;--cyan:#13c2c2;--violet:#722ed1;--violet-l:#f3ecff;
  --text:#141a24;--text2:#3d4655;--sub:#6b7585;--line:#e7eaf0;--bg:#fff;--bg2:#f6f8fb;
  --r:14px;--shadow:0 1px 2px rgba(16,24,40,.04),0 8px 24px rgba(16,24,40,.06);--shadow-l:0 24px 60px rgba(22,119,255,.14);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
h1,h2,h3{margin:0;line-height:1.25;letter-spacing:-.01em}
p{margin:0}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
.wrap-narrow{max-width:820px}
.ic{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}
[id]{scroll-margin-top:76px}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:42px;padding:0 20px;border-radius:10px;background:var(--c);color:#fff;font-weight:600;font-size:15px;border:1px solid var(--c);transition:background .15s,transform .15s,box-shadow .15s;white-space:nowrap;cursor:pointer}
.btn:hover{background:var(--c-d);border-color:var(--c-d);box-shadow:0 6px 18px rgba(22,119,255,.28);transform:translateY(-1px)}
.btn .ic{width:18px;height:18px}
.btn-sm{height:36px;padding:0 16px;font-size:14px;border-radius:9px}
.btn-lg{height:52px;padding:0 26px;font-size:16px;border-radius:12px}
.btn-ghost{background:#fff;color:var(--text);border-color:var(--line)}
.btn-ghost:hover{background:#fff;border-color:var(--c);color:var(--c);box-shadow:none}
.btn-white{background:#fff;color:var(--c);border-color:#fff}
.btn-white:hover{background:#f0f7ff;border-color:#f0f7ff;color:var(--c-d)}
.btn-block{width:100%}

/* 顶栏 */
.top{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.82);backdrop-filter:saturate(180%) blur(14px);-webkit-backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid transparent;transition:border-color .2s,box-shadow .2s}
.top.scrolled{border-bottom-color:var(--line);box-shadow:0 2px 12px rgba(16,24,40,.04)}
.top-in{display:flex;align-items:center;height:68px;gap:32px}
.logo{display:flex;align-items:center;gap:10px;font-size:19px;white-space:nowrap}
.logo b{font-weight:700;letter-spacing:-.02em}
.logo-mark{width:32px;height:32px;flex-shrink:0}
.logo-img{display:block;height:40px;width:auto}
.logo-img.logo-en{height:36px}
.foot .logo-img{height:44px}
.menu{display:flex;gap:4px}
.menu a{padding:8px 14px;border-radius:8px;color:var(--text2);font-size:15px;transition:color .15s,background .15s}
.menu a:hover{color:var(--c);background:var(--c-l)}
.top-act{margin-left:auto;display:flex;align-items:center;gap:8px}
.lang{display:flex;align-items:center;gap:6px;color:var(--text2);font-size:14px;padding:8px 10px;border-radius:8px}
.lang .ic{width:17px;height:17px}
.lang:hover{background:var(--bg2);color:var(--text)}
.link-login{font-size:15px;color:var(--text2);padding:8px 12px;border-radius:8px}
.link-login:hover{color:var(--c)}
.burger{display:none;width:40px;height:40px;border:0;background:none;padding:10px 9px;cursor:pointer;flex-direction:column;justify-content:space-between}
.burger i{display:block;height:2px;border-radius:2px;background:var(--text);transition:transform .2s,opacity .2s}
.menu-open .burger i:nth-child(1){transform:translateY(8px) rotate(45deg)}
.menu-open .burger i:nth-child(2){opacity:0}
.menu-open .burger i:nth-child(3){transform:translateY(-8px) rotate(-45deg)}

/* 首屏 */
.hero{position:relative;overflow:hidden;min-height:640px;display:flex;align-items:center;background:#fff}
.hero-bg{position:absolute;top:0;right:0;bottom:0;width:68%;background-size:cover;background-position:right center}
.hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,#fff 0,rgba(255,255,255,.6) 14%,rgba(255,255,255,0) 34%),linear-gradient(0deg,#fff 0,rgba(255,255,255,0) 14%)}
.hero-in{position:relative;width:100%;padding-top:56px;padding-bottom:72px}
.hero-text{max-width:560px}
.badge{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--c);background:var(--c-l);padding:6px 12px;border-radius:99px;margin-bottom:22px}
.badge i{width:7px;height:7px;border-radius:50%;background:var(--c);box-shadow:0 0 0 4px rgba(22,119,255,.18)}
.hero h1{font-size:56px;font-weight:800;letter-spacing:-.03em;line-height:1.1}
.zh .hero h1{font-size:54px;letter-spacing:0;line-height:1.2}
.hero h1 span{background:linear-gradient(90deg,var(--c) 0%,#5b8cff 50%,var(--violet) 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:18px;color:var(--text2);margin:22px 0 32px;max-width:520px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
.facts{list-style:none;padding:0;margin:44px 0 0;display:grid;grid-template-columns:repeat(4,auto);gap:28px;justify-content:start}
.facts li{display:flex;flex-direction:column;padding-left:14px;border-left:2px solid var(--c-l)}
.facts b{font-size:22px;font-weight:700;color:var(--text)}
.facts span{font-size:13px;color:var(--sub);line-height:1.4}

/* 通用段落 */
.sec{padding:96px 0}
.sec-alt{background:var(--bg2)}
.sec-head{text-align:center;max-width:720px;margin:0 auto 56px}
.sec-head h2{font-size:38px;font-weight:750;letter-spacing:-.02em}
.zh .sec-head h2{letter-spacing:0}
.sec-head p{margin-top:14px;color:var(--sub);font-size:17px}

/* 痛点 */
.pains{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.pain{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:26px 24px;display:flex;flex-direction:column;transition:transform .2s,box-shadow .2s,border-color .2s}
.pain:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#d6e4ff}
.pain-ic{width:46px;height:46px;border-radius:12px;background:#fff1f0;color:#f5222d;display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.pain:nth-child(2) .pain-ic{background:#fff7e6;color:#fa8c16}
.pain:nth-child(3) .pain-ic{background:#f9f0ff;color:var(--violet)}
.pain:nth-child(4) .pain-ic{background:#e6fffb;color:var(--cyan)}
.pain-ic .ic{width:24px;height:24px}
.pain h3{font-size:18px;font-weight:700}
.pain-q{color:var(--sub);font-size:14.5px;margin:10px 0 18px;flex:1}
.pain-a{display:flex;gap:10px;align-items:flex-start;padding-top:16px;border-top:1px dashed var(--line);font-size:14.5px;color:var(--text);font-weight:500}
.pain-a .ic{color:#52c41a;width:18px;height:18px;margin-top:3px;stroke-width:2.4}

/* 功能 */
.feat{display:grid;grid-template-columns:1fr 1.08fr;gap:72px;align-items:center;margin-bottom:104px}
.feat-rev .feat-text{order:2}
.tag{display:inline-block;font-size:13px;font-weight:600;color:var(--c);background:var(--c-l);padding:4px 12px;border-radius:99px;margin-bottom:16px}
.tag-ai{color:var(--violet);background:var(--violet-l)}
.tag-site{color:#08979c;background:#e6fffb}
.feat h3{font-size:32px;font-weight:750;letter-spacing:-.02em}
.zh .feat h3{letter-spacing:0}
.feat-text>p{color:var(--text2);font-size:16.5px;margin:16px 0 22px}
.ticks{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:12px}
.ticks li{display:flex;gap:10px;align-items:flex-start;font-size:15.5px}
.ticks .ic{width:20px;height:20px;padding:3px;border-radius:50%;background:var(--c-l);color:var(--c);stroke-width:2.6;margin-top:2px}

/* 界面示意 */
.mock{background:#fff;border-radius:16px;box-shadow:var(--shadow-l);border:1px solid #e3ebf7;overflow:hidden}
.mock-bar{display:flex;align-items:center;gap:6px;height:44px;padding:0 16px;border-bottom:1px solid var(--line);font-size:13px;color:var(--text2)}
.mock-bar>i{width:10px;height:10px;border-radius:50%;background:#ff5f57}
.mock-bar>i:nth-child(2){background:#febc2e}.mock-bar>i:nth-child(3){background:#28c840}
.mock-bar span{margin-left:12px;display:flex;align-items:center;gap:6px;font-weight:600}
.mock-bar time{margin-left:auto;font-size:12px;color:#fff;background:#1d2b4f;padding:2px 9px;border-radius:99px}
.mock-body{padding:22px 20px;display:flex;flex-direction:column;gap:16px;background:linear-gradient(#fbfcfe,#f5f8fc)}
.m-row{display:flex;gap:10px;align-items:flex-end}
.m-row.me{justify-content:flex-end}
.av{width:32px;height:32px;border-radius:50%;color:#fff;font-weight:700;font-size:13px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.av-p{background:#fa8c16}.av-g{background:#13c2c2}
.bub{max-width:80%;background:#fff;border:1px solid var(--line);border-radius:14px 14px 14px 4px;padding:10px 14px;font-size:14px;line-height:1.55;box-shadow:0 1px 2px rgba(16,24,40,.04)}
.bub-me{background:var(--c);color:#fff;border-color:var(--c);border-radius:14px 14px 4px 14px}
.bub-ai{background:#f3ecff;border-color:#e2d4ff;color:#2b1659;border-radius:14px 14px 4px 14px}
.ai-tag{display:inline-block;font-size:10.5px;font-weight:700;color:#fff;background:var(--violet);padding:0 6px;border-radius:4px;margin-right:6px;vertical-align:1px}
.tr{margin-top:8px;padding-top:8px;border-top:1px dashed #e3e7ee;font-size:13px;color:var(--text2)}
.tr b{display:block;font-size:11px;font-weight:600;color:var(--c);margin-bottom:2px}
.tr-me{border-top-color:rgba(255,255,255,.35);color:rgba(255,255,255,.88)}
.tr-me b{color:#fff;opacity:.85}
.mock-input{display:flex;align-items:center;gap:10px;padding:12px 16px;border-top:1px solid var(--line);font-size:13px}
.mock-input span{flex:1;color:#a0a8b5}
.chip{display:inline-flex;align-items:center;gap:5px;font-style:normal;border:1px solid var(--line);border-radius:7px;padding:3px 8px;color:var(--text2)}
.mock-input b{background:var(--c);color:#fff;font-weight:600;font-size:12.5px;padding:6px 12px;border-radius:7px}
.m-sys{align-self:center;display:flex;align-items:center;gap:6px;font-size:12.5px;color:#d46b08;background:#fff7e6;border:1px solid #ffe7ba;padding:5px 12px;border-radius:99px}
.m-sys .ic{width:15px;height:15px}
[data-flag]{display:inline-flex;font-style:normal}
.kf-flag{display:inline-flex;width:18px;height:13px;border-radius:2px;overflow:hidden;box-shadow:0 0 0 1px rgba(0,0,0,.06);flex-shrink:0}
.kf-flag svg{width:100%;height:100%;display:block}

/* 多站点示意 */
.sites{position:relative;height:400px}
.site-card{position:absolute;width:62%;background:#fff;border-radius:12px;border:1px solid #e3ebf7;box-shadow:var(--shadow);overflow:hidden}
.site-card.s1{left:0;top:0;--k:#1677ff}
.site-card.s2{left:12%;top:112px;--k:#eb2f96}
.site-card.s3{left:24%;top:224px;--k:#13c2c2}
.sc-bar{display:flex;align-items:center;gap:5px;height:32px;padding:0 12px;background:#f7f9fc;border-bottom:1px solid var(--line);font-size:11.5px;color:var(--sub)}
.sc-bar i{width:7px;height:7px;border-radius:50%;background:#d9dee7}
.sc-bar span{margin-left:8px}
.sc-body{padding:16px;display:flex;flex-direction:column;gap:9px;height:118px}
.sc-body b{height:10px;border-radius:5px;background:#eef1f6;width:86%}
.sc-body b.s{width:52%}
.sc-btn{position:absolute;right:16px;top:46px;width:40px;height:40px;border-radius:50%;background:var(--k);color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 16px rgba(0,0,0,.18)}
.sc-btn.left{right:auto;left:14px}
.sc-btn .ic{width:19px;height:19px}
.inbox{position:absolute;right:0;bottom:0;width:46%;background:#fff;border-radius:14px;box-shadow:var(--shadow-l);border:1px solid #e3ebf7;padding:14px;z-index:2}
.ib-h{display:flex;align-items:center;justify-content:space-between;font-weight:700;font-size:14px;margin-bottom:10px}
.ib-h span{background:#ff4d4f;color:#fff;font-size:11px;min-width:18px;height:18px;border-radius:9px;display:flex;align-items:center;justify-content:center;padding:0 5px}
.ib-r{display:flex;align-items:center;gap:8px;padding:9px 8px;border-radius:8px;font-size:12.5px}
.ib-r:nth-child(2){background:var(--c-l)}
.ib-r i{width:8px;height:8px;border-radius:50%}
.ib-r i.c1{background:#1677ff}.ib-r i.c2{background:#eb2f96}.ib-r i.c3{background:#13c2c2}
.ib-r b{font-weight:500;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* 更多功能 */
.grid-t{text-align:center;font-size:24px;font-weight:700;margin-bottom:28px}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.g-item{display:flex;gap:14px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px}
.g-ic{width:40px;height:40px;border-radius:10px;background:var(--c-l);color:var(--c);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.g-item b{font-size:15px;font-weight:650}
.g-item p{font-size:13.5px;color:var(--sub);margin-top:3px;line-height:1.5}

/* 语言 */
.langs{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;max-width:980px;margin:0 auto}
.lg{display:inline-flex;align-items:center;gap:9px;padding:10px 16px;border-radius:99px;background:#fff;border:1px solid var(--line);font-size:14.5px;transition:border-color .15s,transform .15s,box-shadow .15s}
.lg:hover{border-color:#b7d4ff;transform:translateY(-2px);box-shadow:var(--shadow)}
.lg .kf-flag{width:22px;height:16px}
.lg small{color:var(--sub);font-size:12.5px}

/* 步骤 */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;counter-reset:s}
.step{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:28px 26px}
.step-n{display:flex;width:40px;height:40px;border-radius:12px;background:var(--c);color:#fff;font-weight:700;align-items:center;justify-content:center;margin-bottom:18px;font-size:17px}
.step h3{font-size:19px;font-weight:700}
.step p{color:var(--sub);font-size:15px;margin-top:8px}
.code{max-width:820px;margin:40px auto 0;border-radius:12px;background:#0f1729;color:#d6e2ff;overflow:hidden;box-shadow:var(--shadow)}
.code-bar{display:flex;justify-content:space-between;align-items:center;padding:10px 16px;border-bottom:1px solid #1f2a44;font-size:12.5px;color:#8e9bb8}
.code-bar button{background:#1f2a44;color:#d6e2ff;border:0;border-radius:6px;padding:4px 12px;font-size:12.5px;cursor:pointer}
.code-bar button:hover{background:#2a3858}
.code pre{margin:0;padding:18px 20px;font:14px/1.6 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;white-space:pre-wrap;word-break:break-all}

/* 价格 */
.period{display:flex;width:max-content;margin:0 auto 40px;background:var(--bg2);border:1px solid var(--line);border-radius:12px;padding:4px}
.period button{border:0;background:none;padding:9px 20px;border-radius:9px;font-size:14.5px;font-weight:600;color:var(--text2);cursor:pointer;display:flex;align-items:center;gap:8px;font-family:inherit}
.period button.on{background:#fff;color:var(--text);box-shadow:0 1px 4px rgba(16,24,40,.1)}
.period em{font-style:normal;font-size:11.5px;color:#389e0d;background:#f6ffed;border:1px solid #d9f7be;padding:1px 7px;border-radius:99px}
.plans{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:24px;max-width:1080px;margin:0 auto;align-items:start}
.plan{position:relative;background:#fff;border:1px solid var(--line);border-radius:18px;padding:32px 28px;transition:box-shadow .2s}
.plan:hover{box-shadow:var(--shadow)}
.plan-rec{border:2px solid var(--c);box-shadow:var(--shadow-l);padding:31px 27px}
.plan-badge{position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:linear-gradient(90deg,var(--c),var(--violet));color:#fff;font-size:12.5px;font-weight:700;padding:4px 14px;border-radius:99px;white-space:nowrap}
.plan h3{font-size:19px;font-weight:700}
.plan-price{margin:16px 0 24px;min-height:76px}
.pp{display:none;align-items:baseline;gap:4px;flex-wrap:wrap}
.plans[data-period=month] .pp[data-p=month],.plans[data-period=quarter] .pp[data-p=quarter],.plans[data-period=year] .pp[data-p=year]{display:flex}
.pp b{font-size:42px;font-weight:800;letter-spacing:-.03em;line-height:1.1}
.pp b.na{color:#c0c6d0}
.pp span{color:var(--sub);font-size:15px}
.pp em{font-style:normal;margin-left:8px;font-size:12px;color:#389e0d;background:#f6ffed;border:1px solid #d9f7be;padding:1px 8px;border-radius:99px;align-self:center}
.pp small{flex-basis:100%;font-size:13px;color:var(--sub);margin-top:4px}
.pf{list-style:none;padding:0;margin:24px 0 0;display:flex;flex-direction:column;gap:11px}
.pf li{display:flex;gap:10px;align-items:center;font-size:14.5px}
.pf .ic{width:18px;height:18px;color:#52c41a;stroke-width:2.4}
.pf li.off{color:#a8afbb}
.pf li.off .ic{color:#c9ced6}
.price-note{text-align:center;color:var(--sub);font-size:14px;margin-top:28px}

/* FAQ */
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:12px;transition:border-color .15s}
.faq details[open]{border-color:#c7dcff}
.faq summary{list-style:none;cursor:pointer;padding:18px 22px;font-weight:600;font-size:16px;display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";width:9px;height:9px;border-right:2px solid var(--sub);border-bottom:2px solid var(--sub);transform:rotate(45deg) translate(-3px,-3px);transition:transform .2s;flex-shrink:0}
.faq details[open] summary::after{transform:rotate(-135deg) translate(-2px,-2px)}
.faq details p{padding:0 22px 20px;color:var(--text2);font-size:15px}

/* 结尾 */
.cta{background:linear-gradient(120deg,#0958d9 0%,#1677ff 45%,#6a4cff 100%);color:#fff;position:relative;overflow:hidden}
.cta::before{content:"";position:absolute;right:-120px;top:-160px;width:460px;height:460px;border-radius:50%;background:rgba(255,255,255,.08)}
.cta-in{position:relative;display:flex;align-items:center;justify-content:space-between;gap:32px;padding-top:72px;padding-bottom:72px}
.cta h2{font-size:34px;font-weight:750}
.cta p{opacity:.85;margin-top:10px;font-size:17px}

/* 页脚 */
.foot{background:#0f1729;color:#9aa6bf;font-size:14px}
.foot-in{display:flex;gap:64px;padding-top:56px;padding-bottom:40px}
.foot-brand{flex:1}
.foot .logo{color:#fff}
.foot-brand p{margin-top:14px;max-width:320px}
.foot-col{display:flex;flex-direction:column;gap:10px;min-width:120px}
.foot-col b{color:#fff;font-weight:600;margin-bottom:4px}
.foot-col a:hover{color:#fff}
.foot-copy{border-top:1px solid #1f2a44;padding-top:20px;padding-bottom:28px;font-size:13px}

/* 客服 App 下载 */
.app-feat{margin-bottom:0}
.app-card{display:flex;gap:28px;align-items:center;background:#fff;border:1px solid #e3ebf7;border-radius:20px;box-shadow:var(--shadow-l);padding:28px}
.app-qr-box{flex-shrink:0;text-align:center}
.app-qr{width:168px;height:168px;padding:12px;border:1px solid var(--line);border-radius:14px;background:#fff}
.app-qr svg{display:block;width:100%;height:100%}
.app-qr-box b{display:block;margin-top:10px;font-size:14px;color:var(--text2);font-weight:600}
.app-dl{flex:1;min-width:0}
.app-id{display:flex;gap:14px;align-items:center;margin-bottom:20px}
.app-id img{width:56px;height:56px;border-radius:14px;box-shadow:0 4px 12px rgba(22,119,255,.2)}
.app-id b{display:block;font-size:18px}
.app-id span{font-size:13.5px;color:var(--sub)}
.app-dl .btn .ic{width:20px;height:20px}
.app-tip{margin-top:14px;font-size:13px;color:var(--sub);line-height:1.6}

/* 出现动画 */
.rv{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.rv{opacity:1;transform:none;transition:none}}

/* 响应式 */
@media (max-width:1100px){
  .pains,.grid{grid-template-columns:repeat(2,1fr)}
  .feat{gap:48px}
  .hero h1{font-size:46px}.zh .hero h1{font-size:44px}
  .facts{grid-template-columns:repeat(2,auto);gap:20px 32px}
}
@media (max-width:900px){
  .menu{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;flex-direction:column;padding:8px 16px 16px;border-bottom:1px solid var(--line);box-shadow:0 12px 24px rgba(16,24,40,.08)}
  .menu a{padding:12px}
  .menu-open .menu{display:flex}
  .burger{display:flex}
  .link-login{display:none}
  .hero{flex-direction:column;align-items:stretch;min-height:0}
  .hero-bg{position:relative;width:100%;height:auto;aspect-ratio:3/2;order:2;background-position:62% center}
  .hero-bg::after{background:linear-gradient(180deg,#fff 0,rgba(255,255,255,0) 22%)}
  .hero-in{padding-top:40px;padding-bottom:8px}
  .feat,.feat-rev{grid-template-columns:1fr;gap:36px;margin-bottom:72px}
  .feat-rev .feat-text{order:0}
  .steps{grid-template-columns:1fr}
  .cta-in{flex-direction:column;align-items:flex-start}
  .foot-in{flex-wrap:wrap;gap:32px}
  .foot-brand{flex-basis:100%}
}
@media (max-width:600px){
  .wrap{padding:0 16px}
  .top-in{gap:12px;height:60px}
  .menu{top:60px}
  .logo-img{height:34px}.logo-img.logo-en{height:30px}
  .lang span,.top-act .btn-sm{font-size:13px}
  .top-act .btn-sm{padding:0 12px}
  .hero h1,.zh .hero h1{font-size:36px}
  .lead{font-size:16px}
  .hero-cta .btn{width:100%}
  .sec{padding:64px 0}
  .sec-head{margin-bottom:36px}
  .sec-head h2{font-size:28px}
  .feat h3{font-size:25px}
  .pains,.grid{grid-template-columns:1fr}
  .sites{height:360px}
  .site-card{width:78%}
  .site-card.s2{left:8%;top:100px}.site-card.s3{left:16%;top:200px}
  .inbox{width:62%}
  .period button{padding:8px 12px;font-size:13.5px}
  .cta h2{font-size:26px}
  .app-card{padding:20px}
  .app-qr-box{display:none}  /* 手机上直接点按钮下载，不显示二维码 */
}
@media (max-width:420px){
  .lang{padding:8px 6px}
  .lang .ic{display:none}
}