/* Topros AI — landing page styles */
:root{
  --bg:#0a0e1a;
  --bg-soft:#0f1424;
  --bg-card:#151a2c;
  --ink:#e7ecf5;
  --ink-soft:#9aa3b8;
  --ink-muted:#6b7488;
  --accent:#00d4aa;
  --accent-2:#00b894;
  --line:#222a40;
  --line-soft:#1a2034;
  --max:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:'Inter','Noto Sans TC','Noto Sans SC',-apple-system,BlinkMacSystemFont,sans-serif;
  font-weight:400;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
html[lang="zh-Hant"] body,html[lang="zh-Hans"] body{font-family:'Noto Sans TC','Noto Sans SC','Inter',sans-serif}
html[lang="zh-Hans"] body{font-family:'Noto Sans SC','Noto Sans TC','Inter',sans-serif}

a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--max);margin:0 auto;padding:0 28px;position:relative;z-index:2}

/* Header */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 32px;
  background:rgba(10,14,26,.7);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line-soft);
}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.05rem}
.brand-mark{
  width:30px;height:30px;border-radius:8px;
  background:linear-gradient(135deg,var(--accent) 0%,var(--accent-2) 100%);
  color:var(--bg);display:grid;place-items:center;
  font-weight:800;font-size:1rem;
}
.brand-accent{color:var(--accent)}
.nav{display:flex;gap:28px;font-size:.92rem}
.nav a{color:var(--ink-soft);transition:color .2s}
.nav a:hover{color:var(--ink)}
.lang{display:flex;gap:6px}
.lang button{
  background:none;border:1px solid transparent;color:var(--ink-muted);
  font:inherit;font-size:.78rem;cursor:pointer;
  padding:5px 9px;border-radius:6px;
  letter-spacing:.05em;
}
.lang button:hover{color:var(--ink)}
.lang button.active{color:var(--accent);border-color:var(--line)}
@media(max-width:760px){
  .site-header{padding:14px 18px;flex-wrap:wrap;gap:10px}
  .nav{display:none}
}

/* Hero */
.hero{
  position:relative;min-height:100vh;display:flex;align-items:center;
  padding:120px 0 80px;overflow:hidden;
}
.hero-bg{
  position:absolute;inset:0;
  background-size:cover;background-position:center;
  filter:grayscale(.2) brightness(.45);
  z-index:0;
}
.hero-overlay{
  position:absolute;inset:0;
  background:
    radial-gradient(800px 500px at 20% 40%,rgba(0,212,170,.12),transparent 60%),
    linear-gradient(135deg,rgba(10,14,26,.92) 0%,rgba(10,14,26,.7) 60%,rgba(10,14,26,.85) 100%);
  z-index:1;
}
.hero-content{
  position:relative;z-index:2;
  max-width:var(--max);margin:0 auto;padding:0 28px;width:100%;
}
.eyebrow{
  display:inline-block;
  font-size:.78rem;font-weight:600;letter-spacing:.18em;text-transform:uppercase;
  color:var(--accent);
  padding:6px 14px;border:1px solid rgba(0,212,170,.3);border-radius:999px;
  margin-bottom:28px;
}
.hero h1{
  font-size:clamp(2.4rem,6vw,4.4rem);
  font-weight:700;line-height:1.1;letter-spacing:-.02em;
  margin-bottom:24px;max-width:880px;
}
.hero h1 .accent{
  background:linear-gradient(135deg,var(--accent) 0%,var(--accent-2) 100%);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.lede{
  font-size:clamp(1.05rem,1.4vw,1.25rem);
  color:var(--ink-soft);max-width:640px;margin-bottom:40px;
}
.cta-row{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:60px}
.cta-primary{
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  color:var(--bg);font-weight:600;font-size:.95rem;
  padding:14px 26px;border-radius:10px;
  transition:transform .2s,box-shadow .2s;
  display:inline-block;
}
.cta-primary:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(0,212,170,.3)}
.cta-primary.big{font-size:1.05rem;padding:18px 32px}
.cta-secondary{
  color:var(--ink);font-weight:500;font-size:.95rem;
  padding:14px 0;
  border-bottom:1px solid var(--line);
  transition:border-color .2s;
}
.cta-secondary:hover{border-color:var(--accent)}

.hero-stats{
  display:grid;grid-template-columns:repeat(3,1fr);gap:32px;
  max-width:540px;padding-top:32px;border-top:1px solid var(--line);
}
.hero-stats div{display:flex;flex-direction:column}
.hero-stats strong{
  font-size:1.8rem;font-weight:700;color:var(--ink);
  line-height:1;
}
.hero-stats strong span{
  font-size:.95rem;color:var(--ink-muted);font-weight:500;margin-left:4px;
}
.hero-stats span:not(strong span){
  font-size:.8rem;color:var(--ink-muted);text-transform:uppercase;letter-spacing:.1em;margin-top:6px;
}
@media(max-width:600px){
  .hero-stats{grid-template-columns:1fr 1fr;gap:20px}
}

/* Sections common */
section{padding:100px 0;position:relative}
.section-eyebrow{
  font-size:.78rem;font-weight:600;letter-spacing:.18em;text-transform:uppercase;
  color:var(--accent);margin-bottom:18px;
}
.section-eyebrow.light{color:var(--accent)}
h2{
  font-size:clamp(2rem,4vw,3rem);
  font-weight:700;line-height:1.15;letter-spacing:-.02em;
  margin-bottom:60px;
}
h2.light{color:var(--ink)}

/* Pain */
.pain{background:var(--bg-soft)}
.pain h2{text-align:center;margin-bottom:50px}
.pain-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
}
.pain-item{
  background:var(--bg-card);border:1px solid var(--line);border-radius:14px;
  padding:28px;display:flex;align-items:center;gap:18px;
  transition:border-color .2s,transform .2s;
}
.pain-item:hover{border-color:var(--accent);transform:translateY(-2px)}
.pain-icon{font-size:2rem;flex-shrink:0}
.pain-item p{color:var(--ink-soft);font-size:.95rem;line-height:1.5}
@media(max-width:840px){.pain-grid{grid-template-columns:1fr 1fr}}
@media(max-width:540px){.pain-grid{grid-template-columns:1fr}}

/* Services */
.services{position:relative;overflow:hidden}
.services-bg{position:absolute;inset:0;background-size:cover;background-position:center;filter:grayscale(.7) brightness(.25);z-index:0}
.services-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,14,26,.95) 0%,rgba(10,14,26,.85) 100%);z-index:1}
.tiers{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.tier{
  background:var(--bg-card);border:1px solid var(--line);border-radius:18px;
  padding:36px 30px;display:flex;flex-direction:column;
  transition:transform .2s,border-color .2s;position:relative;
}
.tier:hover{transform:translateY(-4px);border-color:var(--accent)}
.tier.featured{
  border-color:var(--accent);
  background:linear-gradient(180deg,rgba(0,212,170,.06) 0%,var(--bg-card) 100%);
}
.tier-badge{
  position:absolute;top:-12px;left:30px;
  background:var(--accent);color:var(--bg);
  font-size:.7rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
  padding:5px 12px;border-radius:999px;
}
.tier-name{
  font-size:1.5rem;font-weight:700;margin-bottom:8px;color:var(--ink);
}
.tier-desc{font-size:.9rem;color:var(--ink-muted);margin-bottom:28px;min-height:42px}
.tier-features{list-style:none;flex:1;margin-bottom:32px}
.tier-features li{
  padding:10px 0;font-size:.92rem;color:var(--ink-soft);
  border-bottom:1px solid var(--line-soft);
  position:relative;padding-left:24px;
}
.tier-features li:before{
  content:"✓";position:absolute;left:0;top:10px;
  color:var(--accent);font-weight:700;
}
.tier-features li:last-child{border-bottom:none}
.tier-price{display:flex;flex-direction:column;gap:4px;padding-top:20px;border-top:1px solid var(--line)}
.setup{font-size:1.6rem;font-weight:700;color:var(--ink)}
.monthly{font-size:.95rem;color:var(--ink-soft)}
.monthly small{color:var(--ink-muted);font-size:.8rem;margin-left:2px}
@media(max-width:900px){.tiers{grid-template-columns:1fr;max-width:480px;margin:0 auto}}

/* Industries */
.industries{position:relative;overflow:hidden}
.industries-bg{position:absolute;inset:0;background-size:cover;background-position:center;filter:grayscale(.5) brightness(.3);z-index:0}
.industries-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,14,26,.92) 0%,rgba(10,14,26,.75) 50%,rgba(10,14,26,.92) 100%);z-index:1}
.industry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.industry-card{
  background:rgba(21,26,44,.7);backdrop-filter:blur(8px);
  border:1px solid var(--line);border-radius:14px;
  padding:32px 26px;
  transition:transform .2s,border-color .2s;
}
.industry-card:hover{transform:translateY(-3px);border-color:var(--accent)}
.industry-icon{font-size:2.2rem;margin-bottom:16px}
.industry-card h3{font-size:1.15rem;font-weight:600;color:var(--ink);margin-bottom:10px}
.industry-card p{font-size:.9rem;color:var(--ink-soft);line-height:1.5}
@media(max-width:840px){.industry-grid{grid-template-columns:1fr 1fr}}
@media(max-width:540px){.industry-grid{grid-template-columns:1fr}}

/* How it works */
.how{background:var(--bg-soft)}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.step{
  padding:28px 24px;background:var(--bg-card);border:1px solid var(--line);border-radius:14px;
}
.step-num{
  font-size:2.2rem;font-weight:800;color:var(--accent);
  margin-bottom:14px;line-height:1;
  font-family:'Inter',sans-serif;
  letter-spacing:-.02em;
}
.step h3{font-size:1.05rem;font-weight:600;color:var(--ink);margin-bottom:10px}
.step p{font-size:.88rem;color:var(--ink-soft);line-height:1.5}
@media(max-width:900px){.steps{grid-template-columns:1fr 1fr}}

/* Why */
.why-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.why-item{
  padding:28px 0;border-top:1px solid var(--line);
}
.why-item h3{font-size:1.2rem;font-weight:600;color:var(--ink);margin-bottom:10px}
.why-item p{color:var(--ink-soft);font-size:.95rem;line-height:1.6}
@media(max-width:760px){.why-grid{grid-template-columns:1fr}}

/* Contact */
.contact{position:relative;overflow:hidden;padding:120px 0}
.contact-bg{position:absolute;inset:0;background-size:cover;background-position:center;filter:grayscale(.5) brightness(.25);z-index:0}
.contact-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(0,212,170,.15) 0%,rgba(10,14,26,.92) 60%);z-index:1}
.contact-card{
  max-width:720px;margin:0 auto;text-align:center;
  background:rgba(21,26,44,.85);backdrop-filter:blur(12px);
  border:1px solid var(--line);border-radius:20px;
  padding:60px 40px;
}
.contact-card h2{margin-bottom:18px}
.contact-card p{color:var(--ink-soft);font-size:1.05rem;margin-bottom:32px}
.contact-note{font-size:.85rem;color:var(--ink-muted);margin-top:18px;margin-bottom:0!important}

/* Footer */
.site-footer{
  background:var(--bg-soft);border-top:1px solid var(--line);
  padding:50px 0 30px;
}
.footer-row{
  display:flex;justify-content:space-between;align-items:flex-start;
  flex-wrap:wrap;gap:24px;margin-bottom:32px;
}
.brand-footer{
  display:flex;align-items:center;gap:10px;
  font-weight:700;font-size:1.05rem;margin-bottom:8px;
}
.footer-row p{color:var(--ink-muted);font-size:.9rem}
.footer-links{display:flex;flex-direction:column;gap:8px;font-size:.9rem}
.footer-links a{color:var(--ink-soft);transition:color .2s}
.footer-links a:hover{color:var(--accent)}
.footer-bottom{
  padding-top:20px;border-top:1px solid var(--line-soft);
  font-size:.82rem;color:var(--ink-muted);text-align:center;
}
.footer-bottom a{color:var(--accent)}