:root{--bg:#07090f;--bg2:#0d111b;--card:#111725;--line:#1f2738;--fg:#e9edf6;--fg2:#9aa5bd;--acc:#2ad4e0;--acc2:#1f8fff;--warm:#ff7a3d;--r:14px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.65 system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei","Noto Sans SC","Noto Sans Thai","Leelawadee UI",sans-serif}
html[lang=zh] body{letter-spacing:.02em}
a{color:inherit;text-decoration:none}
.in{max-width:1180px;margin:0 auto;padding:0 22px}
h1,h2,h3{margin:0 0 .6rem;line-height:1.2;font-weight:700}
h1{font-size:clamp(34px,5.6vw,64px);letter-spacing:-.01em}
h2{font-size:clamp(26px,3.4vw,40px)}
h3{font-size:18px}
.eyebrow{color:var(--acc);font-size:13px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;margin:0 0 .8rem}
.lead{color:var(--fg2);font-size:18px;max-width:640px}
.mut{color:var(--fg2)}

/* nav */
.nav{position:sticky;top:0;z-index:20;background:rgba(7,9,15,.78);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav .in{display:flex;align-items:center;gap:22px;height:64px}
.logo{display:flex;align-items:center;gap:9px;font-weight:700;font-size:19px}
.logo img{width:34px;height:31px;filter:drop-shadow(0 0 6px rgba(42,212,224,.45))}
.logo b{color:var(--acc)}
.links{display:flex;gap:22px;margin-left:auto}
.links a{color:var(--fg2);font-size:15px}.links a:hover{color:var(--fg)}
.lang{display:flex;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.lang button{background:transparent;border:0;color:var(--fg2);padding:7px 11px;font:inherit;font-size:13px;cursor:pointer}
.lang button.on{background:var(--acc);color:#031418;font-weight:700}
@media(max-width:760px){.links{display:none}.lang{margin-left:auto}}

/* buttons */
.btn{display:inline-block;padding:13px 22px;border-radius:12px;font-weight:700;font-size:15px;border:1px solid var(--line);cursor:pointer;font-family:inherit}
.btn.primary{background:linear-gradient(90deg,var(--acc),var(--acc2));color:#031418;border:0;box-shadow:0 8px 30px rgba(42,212,224,.25)}
.btn.primary:hover{filter:brightness(1.07)}
.btn.ghost{background:rgba(255,255,255,.04);color:var(--fg)}
.btn.ghost:hover{background:rgba(255,255,255,.09)}

/* hero */
.hero{position:relative;min-height:min(88vh,820px);display:flex;align-items:center;overflow:hidden;padding:90px 0}
.hero-bg{position:absolute;inset:0;background:url('../img/hero.jpg') center 30%/cover no-repeat}
.hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(7,9,15,.96) 0%,rgba(7,9,15,.82) 45%,rgba(7,9,15,.35) 100%),linear-gradient(0deg,var(--bg) 0%,transparent 35%)}
.hero .in{position:relative;width:100%}
.hero h1{max-width:760px}
.cta{display:flex;gap:12px;flex-wrap:wrap;margin:28px 0 30px}
.tags{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:0}
.tags li{border:1px solid var(--line);background:rgba(255,255,255,.03);color:var(--fg2);border-radius:999px;padding:5px 13px;font-size:13px}

/* sections */
.sec{padding:96px 0}
.sec h2{max-width:720px;margin-bottom:34px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:26px;transition:border-color .2s,transform .2s}
.card:hover{border-color:rgba(42,212,224,.5);transform:translateY(-3px)}
.card p{color:var(--fg2);margin:0}
.ic{display:inline-block;font-weight:700;font-size:13px;color:var(--acc);border:1px solid rgba(42,212,224,.35);border-radius:8px;padding:2px 8px;margin-bottom:14px}

/* split */
.split{display:grid;grid-template-columns:1fr 1fr;background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.split .ph{background:center/cover no-repeat;min-height:520px}
.split .tx{padding:80px 56px;max-width:640px}
.points{list-style:none;padding:0;margin:26px 0 0;display:grid;gap:20px}
.points li{padding-left:18px;border-left:2px solid var(--acc)}
.points b{display:block;font-size:17px;margin-bottom:3px}
.points span{color:var(--fg2)}
@media(max-width:900px){.split{grid-template-columns:1fr}.split .ph{min-height:300px}.split .tx{padding:56px 22px}}

/* steps */
.steps{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(5,1fr);gap:14px;counter-reset:s}
.steps li{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px;position:relative}
.steps span{display:inline-flex;width:34px;height:34px;align-items:center;justify-content:center;border-radius:50%;background:linear-gradient(135deg,var(--acc),var(--acc2));color:#031418;font-weight:800;margin-bottom:14px}
.steps p{color:var(--fg2);margin:0;font-size:15px}
@media(max-width:1000px){.steps{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}}

/* gallery */
.gallery{display:grid;grid-template-columns:2fr 1fr 1fr;height:340px}
.gallery div{background:center/cover no-repeat;filter:saturate(.9) brightness(.85)}
@media(max-width:760px){.gallery{grid-template-columns:1fr;height:auto}.gallery div{height:220px}}

/* contact */
.contact .two{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
@media(max-width:900px){.contact .two{grid-template-columns:1fr}}
.mini{color:var(--fg2);padding-left:18px;margin-top:20px}
form{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:26px;display:grid;gap:14px}
label span{display:block;font-size:13px;font-weight:600;color:var(--fg2);margin-bottom:5px}
input,select,textarea{width:100%;background:var(--bg);border:1px solid var(--line);border-radius:10px;color:var(--fg);padding:11px 13px;font:inherit;font-size:15px}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--acc);box-shadow:0 0 0 3px rgba(42,212,224,.18)}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.fmsg{margin:0;font-size:14px;min-height:20px}
.fmsg.ok{color:var(--acc)}.fmsg.bad{color:var(--warm)}

/* footer */
.foot{border-top:1px solid var(--line);padding:26px 0;font-size:14px}
.foot .in{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}