:root{
--blue:#015cd8;
--blue-bright:#2f6efb;
--blue-violet:#4154f1;
--navy:#012970;
--navy-deep:#0a1a3e;
--blue-soft:#e1ecff;
--blue-bg:#f6f9ff;
--ink:#303030;
--ink-2:#565656;
--muted:#999;
--line:#eaeaea;
--bg-soft:#f5f5f5;
--white:#fff;
--shadow:0 10px 30px rgba(1,41,112,.10);
--shadow-hover:0 18px 48px rgba(1,92,216,.22);
--grad:linear-gradient(120deg,#2f6efb 0%,#015cd8 55%,#012970 100%);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
color:var(--ink);background:var(--white);line-height:1.7;
-webkit-font-smoothing:antialiased;
}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section--soft{background:var(--bg-soft)}
.section--bluebg{background:var(--blue-bg)}
/* ---------- Section header ---------- */
.sec-head{text-align:center;max-width:760px;margin:0 auto 56px}
.sec-tag{
display:inline-block;font-size:13px;letter-spacing:3px;font-weight:700;
color:var(--blue);text-transform:uppercase;margin-bottom:14px;
padding:5px 14px;border:1px solid var(--blue-soft);border-radius:30px;background:var(--blue-bg);
}
.sec-title{font-size:34px;font-weight:800;color:var(--navy);letter-spacing:.5px}
.sec-sub{margin-top:14px;color:var(--ink-2);font-size:16px}
/* ---------- Buttons ---------- */
.btn{
display:inline-flex;align-items:center;gap:8px;padding:13px 28px;border-radius:8px;
font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;transition:.25s;
}
.btn--primary{background:var(--grad);color:#fff;box-shadow:0 8px 20px rgba(1,92,216,.28)}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(1,92,216,.38)}
.btn--ghost{background:transparent;color:var(--blue);border-color:var(--blue)}
.btn--ghost:hover{background:var(--blue);color:#fff}
.btn--light{background:#fff;color:var(--navy)}
.btn--light:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.link-more{display:inline-flex;align-items:center;gap:6px;color:var(--blue);font-weight:600;font-size:15px}
.link-more::after{content:"→";transition:.25s}
.link-more:hover::after{transform:translateX(5px)}
/* ---------- Nav ---------- */
header.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,.92);
backdrop-filter:blur(10px);border-bottom:1px solid transparent;transition:.3s}
header.nav.scrolled{box-shadow:0 4px 20px rgba(1,41,112,.08);border-color:var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{font-weight:800;font-size:20px;color:var(--navy);letter-spacing:.5px;
display:inline-flex;align-items:baseline;gap:8px;line-height:1}
.logo .en{color:var(--blue);font-weight:900;letter-spacing:2px;font-size:22px}
.logo .zh{color:var(--navy);font-weight:800;letter-spacing:1px}
.logo .zh-en{color:var(--navy);font-weight:700;letter-spacing:.5px;font-size:18px}
.nav-links{display:flex;align-items:center;gap:34px}
.nav-links a{font-size:15px;color:var(--ink);font-weight:500;transition:.2s;position:relative;padding:6px 0}
.nav-links a:hover{color:var(--blue)}
.nav-links a.active{color:var(--blue)}
.nav-links a::after{content:"";position:absolute;left:0;bottom:-2px;height:2px;width:0;background:var(--blue);transition:.25s}
.nav-links a:hover::after{width:100%}
.nav-links a.active::after{width:100%}
.nav-cta{display:flex;align-items:center;gap:14px}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer}
.hamburger span{width:24px;height:2px;background:var(--navy);border-radius:2px}
/* ---------- Language switcher (top-right) ---------- */
.lang-switch{display:inline-flex;align-items:center;height:34px;border:1px solid var(--line);
border-radius:20px;overflow:hidden;background:#fff;padding:3px;gap:2px}
.lang-switch button{background:transparent;border:none;padding:0 12px;height:100%;
font-size:12.5px;font-weight:700;color:var(--ink-2);cursor:pointer;letter-spacing:.5px;
border-radius:16px;transition:.2s;line-height:1;font-family:inherit}
.lang-switch button:hover{color:var(--blue)}
.lang-switch button.active{background:var(--grad);color:#fff;box-shadow:0 4px 10px rgba(1,92,216,.25)}
.lang-switch .sep{color:var(--line);font-size:14px;user-select:none}
/* ---------- i18n: hide/show by language (4 atomic rules — never delete any one) ----------
关键：必须用 :not([data-zh]) / :not([data-en]) 限定，
否则带 "双属性" 的元素（data-zh + data-en 同时存在）会被 [data-en] 规则误杀。
双属性元素永远不参与 display 控制 —— 它们的 textContent 会被 JS 切换，
CSS 只管纯单属性元素（双 span 模式）。 */
[data-en]:not([data-zh]){display:none}
[data-zh]:not([data-en]){display:initial}
body.lang-en [data-zh]:not([data-en]){display:none !important}
body.lang-en [data-en]:not([data-zh]){display:initial !important}
/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:160px 0 110px;color:#fff;
background:radial-gradient(1200px 600px at 80% -10%,rgba(47,110,251,.45),transparent 60%),
radial-gradient(900px 500px at 0% 110%,rgba(1,41,112,.7),transparent 55%),
linear-gradient(135deg,#0a1a3e 0%,#012970 55%,#015cd8 100%);}
.hero::before{content:"";position:absolute;inset:0;
background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
background-size:46px 46px;mask-image:radial-gradient(circle at 70% 30%,#000,transparent 75%);}
.hero-grid{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero-tag{display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:2px;
font-weight:700;color:#cfe0ff;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);
padding:7px 16px;border-radius:30px;margin-bottom:22px}
.hero-tag .dot{width:8px;height:8px;border-radius:50%;background:#5fd0ff;box-shadow:0 0 10px #5fd0ff}
.hero h1{font-size:48px;line-height:1.2;font-weight:800;letter-spacing:.5px}
.hero h1 .hl{background:linear-gradient(90deg,#7fd0ff,#cfe0ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{margin-top:22px;font-size:17px;color:#dbe6ff;max-width:520px}
.hero-actions{margin-top:34px;display:flex;gap:16px;flex-wrap:wrap}
/* Hero module chain - 3x3 grid */
.chain{position:relative;background:linear-gradient(160deg,rgba(255,255,255,.08),rgba(255,255,255,.02));
border:1px solid rgba(255,255,255,.14);border-radius:20px;padding:22px;
backdrop-filter:blur(10px);overflow:hidden}
.chain::before{content:"";position:absolute;inset:-40px;
background:radial-gradient(circle at 25% 20%,rgba(47,110,251,.32),transparent 55%),
radial-gradient(circle at 80% 80%,rgba(127,208,255,.2),transparent 50%);
pointer-events:none}
.chain-head{display:flex;align-items:center;justify-content:space-between;
margin-bottom:16px;position:relative;z-index:2}
.chain h4{font-size:13px;letter-spacing:2px;color:#9fc1ff;
text-transform:uppercase;font-weight:700;margin:0}
.chain-tag{font-size:10px;color:#7fd0ff;background:rgba(127,208,255,.12);
border:1px solid rgba(127,208,255,.3);padding:4px 10px;border-radius:20px;
letter-spacing:1px;font-weight:700}
.chain-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;
position:relative;z-index:2}
.chain-card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);
border-radius:11px;padding:12px 10px;transition:.3s;position:relative;overflow:hidden;
animation:cardIn .45s ease both}
.chain-grid .chain-card{animation-delay:calc(var(--i,0)*70ms)}
@keyframes cardIn{from{opacity:0;transform:translateY(10px) scale(.96)}
to{opacity:1;transform:none}}
.chain-card:hover{background:rgba(255,255,255,.13);border-color:rgba(127,208,255,.45);
transform:translateY(-3px);box-shadow:0 10px 22px rgba(1,92,216,.28)}
.chain-card::after{content:"";position:absolute;left:0;top:0;width:3px;height:100%;
background:linear-gradient(180deg,#7fd0ff,#2f6efb);opacity:0;transition:.3s}
.chain-card:hover::after{opacity:1}
.cc-num{display:inline-flex;align-items:center;justify-content:center;
font-size:10px;font-weight:800;color:#7fd0ff;letter-spacing:1px;
min-width:30px;height:18px;padding:0 6px;border-radius:5px;
background:rgba(127,208,255,.12);border:1px solid rgba(127,208,255,.25)}
.cc-ico{margin-top:8px;width:22px;height:22px;
display:grid;place-items:center;color:#cfe0ff}
.cc-ico svg{width:18px;height:18px;stroke:currentColor;fill:none;
stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.cc-title{margin-top:6px;font-size:13.5px;font-weight:700;color:#fff;line-height:1.3}
.cc-sub{margin-top:1px;font-size:11px;color:#9fb5e0;line-height:1.4}
/* ---------- Subpage banner ---------- */
.page-hero{position:relative;overflow:hidden;padding:150px 0 72px;color:#fff;
background:radial-gradient(900px 500px at 88% -25%,rgba(47,110,251,.5),transparent 60%),
radial-gradient(700px 420px at 0% 130%,rgba(1,41,112,.7),transparent 55%),
linear-gradient(135deg,#0a1a3e 0%,#012970 55%,#015cd8 100%);}
.page-hero::before{content:"";position:absolute;inset:0;
background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
background-size:46px 46px;mask-image:radial-gradient(circle at 75% 35%,#000,transparent 75%);}
.breadcrumb{position:relative;font-size:13px;color:#aecbff;letter-spacing:.5px;margin-bottom:16px}
.breadcrumb a{color:#cfe0ff}
.breadcrumb a:hover{color:#fff}
.breadcrumb span{margin:0 8px;opacity:.6}
.page-hero h1{position:relative;font-size:40px;font-weight:800;letter-spacing:.5px;line-height:1.25}
.page-hero p{position:relative;margin-top:14px;color:#dbe6ff;max-width:660px;font-size:16px}
/* ---------- Stats ---------- */
.stats{background:var(--navy);color:#fff;padding:46px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat .num{font-size:40px;font-weight:800;background:linear-gradient(90deg,#7fd0ff,#fff);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat .lbl{margin-top:6px;color:#bcd0ff;font-size:14px;letter-spacing:1px}
/* ---------- Quick links (home) ---------- */
.ql-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.ql-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:30px 26px;
transition:.28s;position:relative;overflow:hidden;display:block}
.ql-card::before{content:"";position:absolute;top:0;left:0;width:100%;height:3px;background:var(--grad);
transform:scaleX(0);transform-origin:left;transition:.3s}
.ql-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:transparent}
.ql-card:hover::before{transform:scaleX(1)}
.ql-ico{width:50px;height:50px;border-radius:13px;background:var(--blue-bg);
display:grid;place-items:center;margin-bottom:18px}
.ql-ico svg{width:26px;height:26px;stroke:var(--blue);fill:none;stroke-width:1.7;
stroke-linecap:round;stroke-linejoin:round}
.ql-card h3{font-size:19px;color:var(--navy);font-weight:700}
.ql-card .en{font-size:12px;color:var(--muted);letter-spacing:1px;text-transform:uppercase;margin-top:2px}
.ql-card p{margin-top:10px;color:var(--ink-2);font-size:14px}
.ql-card .more{margin-top:14px;color:var(--blue);font-weight:600;font-size:14px;
display:inline-flex;align-items:center;gap:6px}
.ql-card .more::after{content:"→";transition:.25s}
.ql-card:hover .more::after{transform:translateX(5px)}
/* ---------- Modules ---------- */
.mod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.mod-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:28px 26px;
transition:.28s;position:relative;overflow:hidden}
.mod-card::before{content:"";position:absolute;top:0;left:0;width:100%;height:3px;background:var(--grad);transform:scaleX(0);transform-origin:left;transition:.3s}
.mod-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:transparent}
.mod-card:hover::before{transform:scaleX(1)}
.mod-num{font-size:14px;font-weight:800;color:var(--blue);letter-spacing:1px}
.mod-card h3{font-size:19px;color:var(--navy);margin:8px 0 4px;font-weight:700}
.mod-card .en{font-size:12px;color:var(--muted);letter-spacing:1px;text-transform:uppercase}
.mod-card p{margin-top:12px;color:var(--ink-2);font-size:14.5px}
.mod-feature{margin-top:14px;font-size:13px;color:var(--blue);background:var(--blue-bg);
border-radius:8px;padding:8px 12px;display:inline-block}
/* ---------- DIKW architecture ---------- */
.arch-intro{text-align:center;max-width:720px;margin:0 auto 50px;color:var(--ink-2);font-size:17px}
.arch-intro b{color:var(--navy)}
.arch-wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.arch-col{background:#fff;border:1px solid var(--line);border-radius:14px;padding:28px 24px;transition:.28s;position:relative}
.arch-col:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.arch-level{font-size:12px;font-weight:800;letter-spacing:2px;color:var(--blue)}
.arch-en{font-size:12px;color:var(--muted);letter-spacing:1px}
.arch-col h3{font-size:20px;color:var(--navy);margin:10px 0 14px;font-weight:800}
.arch-col ul{list-style:none}
.arch-col li{position:relative;padding-left:18px;margin:9px 0;font-size:14.5px;color:var(--ink-2)}
.arch-col li::before{content:"";position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:50%;background:var(--blue)}
.arch-mini{margin-top:18px;padding-top:16px;border-top:1px dashed var(--line);font-size:13px;color:var(--blue);font-weight:600}
/* ---------- Deployment steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;counter-reset:step}
.step{background:#fff;border:1px solid var(--line);border-radius:14px;padding:30px 24px;position:relative;transition:.28s}
.step:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.step .badge{width:46px;height:46px;border-radius:12px;background:var(--grad);color:#fff;
display:grid;place-items:center;font-size:20px;font-weight:800;margin-bottom:18px;box-shadow:0 8px 18px rgba(1,92,216,.3)}
.step h3{font-size:18px;color:var(--navy);font-weight:700}
.step p{margin-top:10px;color:var(--ink-2);font-size:14.5px}
.step .meta{margin-top:16px;display:flex;gap:10px;flex-wrap:wrap}
.step .chip{font-size:12px;color:var(--blue);background:var(--blue-bg);border-radius:20px;padding:5px 12px;font-weight:600}
.step .chip.alt{color:var(--navy);background:var(--blue-soft)}
/* ---------- Scenarios ---------- */
.scn-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.scn{background:#fff;border:1px solid var(--line);border-radius:14px;padding:30px 26px;transition:.28s;position:relative;overflow:hidden}
.scn:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:transparent}
.scn-ico{width:52px;height:52px;border-radius:13px;background:var(--blue-bg);display:grid;place-items:center;margin-bottom:18px}
.scn-ico svg{width:28px;height:28px;stroke:var(--blue);fill:none;stroke-width:1.7}
.scn h3{font-size:20px;color:var(--navy);font-weight:800}
.scn .mod{font-size:12px;color:var(--muted);letter-spacing:1px;margin-top:2px}
.scn p{margin-top:12px;color:var(--ink-2);font-size:14.5px}
.scn .flag{position:absolute;top:18px;right:18px;font-size:11px;font-weight:700;color:var(--blue);
background:var(--blue-soft);border-radius:20px;padding:4px 11px;letter-spacing:1px}
/* ---------- Smart factory band ---------- */
.sf{background:var(--grad);border-radius:22px;padding:56px;color:#fff;display:grid;
grid-template-columns:1.2fr 1fr;gap:40px;align-items:center;position:relative;overflow:hidden}
.sf::after{content:"";position:absolute;right:-60px;top:-60px;width:280px;height:280px;border-radius:50%;background:rgba(255,255,255,.10)}
.sf h2{font-size:30px;font-weight:800}
.sf p{margin-top:16px;color:#e2ecff;font-size:16px;max-width:520px}
.sf .tags{margin-top:22px;display:flex;gap:12px;flex-wrap:wrap}
.sf .tags span{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.2);border-radius:8px;padding:10px 16px;font-size:14px;font-weight:600}
.sf .btn--light{align-self:start}
/* ---------- About ---------- */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center}
.about h2{font-size:32px;color:var(--navy);font-weight:800;line-height:1.3}
.about p{margin-top:18px;color:var(--ink-2);font-size:16px}
.about .points{margin-top:24px;display:grid;gap:14px}
.about .points div{display:flex;gap:12px;align-items:flex-start}
.about .points .ic{flex:0 0 26px;height:26px;border-radius:7px;background:var(--blue-bg);color:var(--blue);display:grid;place-items:center;font-weight:800;font-size:13px}
.about .points span{color:var(--ink-2);font-size:15px}
.about-visual{background:linear-gradient(135deg,#012970,#015cd8);border-radius:18px;padding:36px;color:#fff;position:relative;overflow:hidden}
.about-visual .ql{font-size:13px;letter-spacing:2px;color:#aecbff;text-transform:uppercase}
.about-visual .q{font-size:22px;font-weight:700;margin-top:10px;line-height:1.5}
.about-visual .flow{margin-top:26px;display:flex;flex-direction:column;gap:10px}
.about-visual .flow .row{display:flex;align-items:center;gap:12px;font-size:15px;color:#dce7ff}
.about-visual .flow .row .n{width:28px;height:28px;border-radius:8px;background:rgba(255,255,255,.14);display:grid;place-items:center;font-weight:700}
/* ---------- Contact page ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.contact-cards{display:grid;gap:16px}
.contact-card{display:flex;gap:16px;align-items:flex-start;background:#fff;border:1px solid var(--line);
border-radius:14px;padding:22px 24px;transition:.25s}
.contact-card:hover{box-shadow:var(--shadow);border-color:transparent}
.contact-card .cic{width:46px;height:46px;border-radius:12px;background:var(--blue-bg);
color:var(--blue);display:grid;place-items:center;font-size:20px;flex:0 0 46px}
.contact-card h4{font-size:16px;color:var(--navy)}
.contact-card p{margin-top:4px;color:var(--ink-2);font-size:14.5px}
.contact-form{background:#fff;border:1px solid var(--line);border-radius:16px;padding:34px;
box-shadow:var(--shadow)}
.contact-form h3{font-size:22px;color:var(--navy);margin-bottom:6px}
.contact-form .hint{color:var(--muted);font-size:14px;margin-bottom:22px}
.field{margin-bottom:18px}
.field label{display:block;font-size:14px;font-weight:600;color:var(--ink);margin-bottom:8px}
.field input,.field textarea{width:100%;padding:12px 14px;border:1px solid var(--line);
border-radius:9px;font-size:15px;font-family:inherit;color:var(--ink);background:#fff;transition:.2s;
-webkit-appearance:none;appearance:none}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--blue);
box-shadow:0 0 0 3px rgba(1,92,216,.12)}
.field textarea{resize:vertical;min-height:120px}
.contact-form .btn{width:100%;justify-content:center;margin-top:6px}
.form-note{margin-top:14px;font-size:13px;color:var(--muted);text-align:center}
.form-ok{display:none;margin-top:16px;padding:14px 16px;border-radius:10px;
background:#e8f6ec;color:#1f8a3b;font-size:14px;font-weight:600;text-align:center}
.form-ok.show{display:block}
/* ---------- Footer ---------- */
footer{background:var(--navy-deep);color:#c7d4ee;padding:64px 0 28px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px}
footer h4{color:#fff;font-size:16px;margin-bottom:18px;font-weight:700}
footer .logo{color:#fff;margin-bottom:16px}
footer p{font-size:14px;color:#a9b8d8;line-height:1.8}
footer ul{list-style:none}
footer ul li{margin:10px 0}
footer ul li a{color:#a9b8d8;font-size:14px;transition:.2s}
footer ul li a:hover{color:#fff}
.foot-contact li{display:flex;gap:10px;align-items:flex-start;color:#a9b8d8;font-size:14px}
.foot-contact .ic{color:var(--blue-bright);flex:0 0 18px;margin-top:3px}
.foot-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:44px;padding-top:22px;
display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;color:#7e8fb5;font-size:13px}
.foot-icp{margin-top:14px;text-align:center;font-size:12.5px;color:#7e8fb5}
.foot-icp a{color:inherit;display:inline-flex;align-items:center;gap:6px;transition:color .2s}
.foot-icp a:hover{color:#fff}
.foot-icp .icp-glyph{width:14px;height:14px;display:inline-block;background:currentColor;
-webkit-mask:url("data:image/svg+xml;utf8,") no-repeat center / contain;
mask:url("data:image/svg+xml;utf8,") no-repeat center / contain;opacity:.85}
/* ---------- Reveal animation ---------- */
.reveal{opacity:0;transform:translateY(28px);transition:.7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
/* ---------- Responsive ---------- */
@media(max-width:980px){
.hero-grid{grid-template-columns:1fr}
.mod-grid,.scn-grid,.ql-grid{grid-template-columns:repeat(2,1fr)}
.arch-wrap,.steps{grid-template-columns:repeat(2,1fr)}
.about-grid,.sf,.contact-grid{grid-template-columns:1fr}
.sf{padding:40px}
.foot-grid{grid-template-columns:1fr 1fr}
.stats-grid{grid-template-columns:repeat(2,1fr);gap:30px}
.sec-title{font-size:28px}
.hero h1{font-size:38px}
.page-hero h1{font-size:32px}
}
@media(max-width:640px){
.nav-links,.nav-cta .btn{display:none}
.lang-switch{height:30px}
.lang-switch button{padding:0 9px;font-size:11.5px}
.hamburger{display:flex}
.nav-links.open{display:flex;position:absolute;top:72px;left:0;right:0;background:#fff;
flex-direction:column;gap:0;padding:14px 24px;box-shadow:0 12px 24px rgba(1,41,112,.1);border-top:1px solid var(--line)}
.nav-links.open a{padding:12px 0;border-bottom:1px solid var(--line);width:100%}
.mod-grid,.scn-grid,.arch-wrap,.steps,.ql-grid{grid-template-columns:1fr}
.foot-grid{grid-template-columns:1fr}
.hero h1{font-size:32px}
.section{padding:64px 0}
.page-hero{padding:130px 0 56px}
.page-hero h1{font-size:28px}
.logo{font-size:17px}
.logo .en{font-size:18px;letter-spacing:1.5px}
.logo .zh{font-size:15px}
}