/* ============================================================
   Rybion Cloud — Corporate Site
   Palette derived from brand logo (violet → blue → cyan)
   ============================================================ */
:root{
  --violet:#7b2ff7;
  --indigo:#4f46e5;
  --blue:#2563eb;
  --cyan:#22c9ee;
  --ink:#181457;          /* deep navy from wordmark */
  --ink-soft:#4b4a72;
  --muted:#6b7194;
  --bg:#ffffff;
  --bg-soft:#f6f7fe;
  --line:#e7e9f6;
  --card:#ffffff;
  --footer:#100e3d;
  --grad:linear-gradient(100deg,var(--violet) 0%,var(--blue) 55%,var(--cyan) 100%);
  --grad-soft:linear-gradient(100deg,rgba(123,47,247,.08),rgba(37,99,235,.08),rgba(34,201,238,.10));
  --radius:16px;
  --shadow:0 10px 34px rgba(24,20,87,.08);
  --shadow-lg:0 24px 60px rgba(24,20,87,.14);
  --font-zh:"Noto Sans TC","PingFang TC","Heiti TC","Microsoft JhengHei","Hiragino Sans GB",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --font-en:"Poppins","Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{
  font-family:var(--font-en),var(--font-zh);
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
html[lang="zh-Hant"] body{font-family:var(--font-zh)}
html[lang="zh-Hant"] .latin{font-family:var(--font-en)}

img{max-width:100%;display:block}
h1,h2,h3,.section-head p{text-wrap:balance}
a{color:inherit;text-decoration:none}
ul{list-style:none}

.container{width:min(1160px,92%);margin-inline:auto}

/* ---------- text helpers ---------- */
.grad-text{
  background:var(--grad);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:.5rem;
  font-size:.82rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:var(--indigo);
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--grad);border-radius:2px}
.section-head{max-width:640px;margin:0 auto 3rem;text-align:center}
.section-head h2{font-size:clamp(1.7rem,3.4vw,2.35rem);font-weight:700;line-height:1.3;margin:.55rem 0 .8rem}
.section-head p{color:var(--muted)}

section{padding:5.5rem 0}
section.tight{padding:3.6rem 0}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.5rem;
  padding:.78rem 1.55rem;border-radius:999px;
  font-weight:600;font-size:.95rem;line-height:1;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease;
  cursor:pointer;border:none;white-space:nowrap;
}
.btn svg{transition:transform .2s ease}
.btn:hover svg{transform:translateX(3px)}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 8px 24px rgba(79,70,229,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(79,70,229,.45)}
.btn-ghost{border:1.5px solid var(--line);color:var(--ink);background:#fff}
.btn-ghost:hover{border-color:var(--indigo);color:var(--indigo)}
.btn:focus-visible{outline:3px solid rgba(79,70,229,.45);outline-offset:2px}
a:focus-visible{outline:3px solid rgba(79,70,229,.45);outline-offset:2px;border-radius:6px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.86);backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:border-color .25s ease,box-shadow .25s ease;
}
.site-header.scrolled{border-color:var(--line);box-shadow:0 6px 24px rgba(24,20,87,.06)}
.nav{display:flex;align-items:center;gap:2rem;height:76px}
.nav-logo{flex:0 0 auto}
.nav-logo img{height:40px;width:auto;max-width:none}
.nav-links{display:flex;gap:1.7rem;margin-left:auto;align-items:center}
.nav-links a{font-size:.95rem;font-weight:500;color:var(--ink-soft);position:relative;padding:.3rem 0;white-space:nowrap}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;
  background:var(--grad);border-radius:2px;transition:width .25s ease;
}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after{width:100%}
.nav-cta{display:flex;align-items:center;gap:.9rem}
.lang-switch{
  font-size:.85rem;font-weight:600;color:var(--ink-soft);white-space:nowrap;
  border:1.5px solid var(--line);border-radius:999px;padding:.42rem .95rem;
  transition:border-color .2s,color .2s;
}
.lang-switch:hover{border-color:var(--indigo);color:var(--indigo)}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:.55rem;margin:-.55rem}
.nav-drawer-cta{display:none}
.nav-toggle span{display:block;width:24px;height:2.4px;background:var(--ink);border-radius:2px;margin:5px 0;transition:.25s}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:5.2rem 0 6rem;
  background:
    radial-gradient(720px 420px at 88% 6%,rgba(34,201,238,.12),transparent 60%),
    radial-gradient(680px 460px at 6% 90%,rgba(123,47,247,.09),transparent 60%),
    var(--bg);
}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:3.5rem;align-items:center}
.hero h1{
  font-size:clamp(1.95rem,4.6vw,3.35rem);
  font-weight:800;line-height:1.22;letter-spacing:.01em;
}
.hero h1 .line2{display:block}
.hero-sub{color:var(--muted);font-size:1.06rem;margin:1.3rem 0 2rem;max-width:32rem}
.hero-actions{display:flex;gap:.9rem;flex-wrap:wrap}
.hero-trust{
  display:flex;align-items:center;gap:.6rem;margin-top:1.7rem;
  color:var(--ink-soft);font-size:.9rem;
}
.hero-trust svg{flex:none;color:var(--indigo)}

/* hero visual */
.hero-visual{position:relative;display:flex;justify-content:center}
.orb{
  position:relative;width:min(430px,86%);aspect-ratio:1/.92;
  display:flex;align-items:center;justify-content:center;
}
.orb::before{
  content:"";position:absolute;inset:6%;border-radius:50%;
  background:radial-gradient(circle at 32% 26%,rgba(123,47,247,.16),rgba(37,99,235,.10) 46%,rgba(34,201,238,.14));
  filter:blur(2px);
}
.orb::after{
  content:"";position:absolute;inset:-4%;border-radius:50%;
  border:1.5px dashed rgba(79,70,229,.25);
  animation:spin 46s linear infinite;
}
.orb img{width:64%;position:relative;filter:drop-shadow(0 22px 44px rgba(37,99,235,.30));animation:float 6s ease-in-out infinite}
.chip{
  position:absolute;display:flex;align-items:center;gap:.5rem;
  background:#fff;border:1px solid var(--line);border-radius:12px;
  padding:.6rem .95rem;font-size:.84rem;font-weight:600;color:var(--ink);
  box-shadow:var(--shadow);white-space:nowrap;
}
.chip .dot{width:9px;height:9px;border-radius:50%;background:var(--grad)}
.chip-1{top:6%;left:-2%;animation:float 7s ease-in-out infinite .4s}
.chip-2{top:38%;right:-6%;animation:float 6.4s ease-in-out infinite 1s}
.chip-3{bottom:4%;left:8%;animation:float 7.4s ease-in-out infinite 1.6s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- services ---------- */
.services{background:var(--bg-soft)}
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem}
.svc-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:2rem 1.8rem;box-shadow:var(--shadow);
  display:flex;flex-direction:column;gap:1rem;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.svc-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:rgba(79,70,229,.35)}
.svc-icon{
  width:54px;height:54px;border-radius:14px;background:var(--grad-soft);
  display:flex;align-items:center;justify-content:center;color:var(--indigo);
}
.svc-card h3{font-size:1.18rem;font-weight:700}
.svc-card>p{color:var(--muted);font-size:.95rem;flex-grow:1}
.svc-list{display:flex;flex-direction:column;gap:.45rem;border-top:1px dashed var(--line);padding-top:1rem}
.svc-list li{display:flex;gap:.55rem;align-items:flex-start;font-size:.9rem;color:var(--ink-soft)}
.svc-list li::before{
  content:"";flex:none;width:6px;height:6px;border-radius:50%;
  background:var(--grad);margin-top:.55em;
}

/* ---------- ecosystem marquee ---------- */
.marquee-block{margin-bottom:2.2rem}
.marquee-block:last-of-type{margin-bottom:1rem}
.marquee-label{
  text-align:center;font-size:.85rem;font-weight:700;letter-spacing:.1em;
  color:var(--ink-soft);text-transform:uppercase;margin-bottom:1.2rem;
}
.marquee{
  position:relative;overflow:hidden;padding:1.2rem 0;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);
}
.marquee-track{
  display:flex;align-items:center;gap:4.5rem;width:max-content;
  animation:marquee 26s linear infinite;
}
.marquee-track.reverse{animation:marquee-rev 30s linear infinite}
.marquee:hover .marquee-track{animation-play-state:paused}
@keyframes marquee{from{transform:translateX(0)}to{transform:translateX(-50%)}}
@keyframes marquee-rev{from{transform:translateX(-50%)}to{transform:translateX(0)}}
.brand-sprite{position:absolute;width:0;height:0;overflow:hidden}
.brand-logo{height:42px;width:auto;display:block;flex:none}
.brand-logo.bl-anthropic{height:30px}
.brand-item{display:inline-flex;align-items:center;gap:.7rem;flex:none}
.brand-name{font-family:var(--font-en);font-size:1.15rem;font-weight:600;color:#3b4260;white-space:nowrap}
.brand-row{
  display:flex;justify-content:center;align-items:center;gap:4.5rem;
  flex-wrap:wrap;padding:1.2rem 0;
}
.marquee.mobile-only{display:none}
.cloud-track{animation:marquee 18s linear infinite}
/* 手機改用跑馬燈、桌機維持固定排列 */
@media (max-width:720px){
  .brand-row.desktop-only{display:none!important}
  .marquee.mobile-only{display:block}
}
.brand-row .brand-item{transition:transform .25s ease,filter .25s ease}
@media (hover:hover){
  .brand-row .brand-item{filter:grayscale(35%) opacity(.85)}
  .brand-row .brand-item:hover{filter:none;transform:translateY(-4px)}
}
.eco-note{margin-top:1.6rem;text-align:center;color:var(--muted);font-size:.85rem}

/* ---------- interactive extras ---------- */
.scroll-progress{
  position:fixed;top:0;left:0;height:3px;width:100%;z-index:60;
  background:var(--grad);transform-origin:0 50%;transform:scaleX(0);
  pointer-events:none;
}
.nav-links a.active{color:var(--ink)}
.nav-links a.active::after{width:100%}

.hero h1 .line2{
  background-size:220% 100%;
  animation:shimmer 7s ease-in-out infinite;
}
@keyframes shimmer{
  0%,100%{background-position:0% 50%}
  50%{background-position:100% 50%}
}

@media (hover:hover){
  .svc-card,.why-card,.ind-card{position:relative;overflow:hidden}
  .svc-card::before,.why-card::before,.ind-card::before{
    content:"";position:absolute;inset:0;border-radius:inherit;
    background:radial-gradient(340px circle at var(--mx,50%) var(--my,50%),rgba(99,91,255,.10),transparent 65%);
    opacity:0;transition:opacity .3s ease;pointer-events:none;
  }
  .svc-card:hover::before,.why-card:hover::before,.ind-card:hover::before{opacity:1}
}

.to-top{
  position:fixed;right:1.4rem;bottom:1.4rem;z-index:55;
  width:46px;height:46px;border-radius:50%;border:none;cursor:pointer;
  background:var(--grad);color:#fff;box-shadow:0 10px 26px rgba(79,70,229,.4);
  display:flex;align-items:center;justify-content:center;
  opacity:0;transform:translateY(14px);pointer-events:none;
  transition:opacity .3s ease,transform .3s ease;
}
.to-top.show{opacity:1;transform:none;pointer-events:auto}
.to-top:hover{transform:translateY(-3px)}
.to-top:focus-visible{outline:3px solid rgba(79,70,229,.45);outline-offset:2px}
@media (prefers-reduced-motion:reduce){
  .hero h1 .line2{animation:none}
  .scroll-progress{display:none}
}
@media (prefers-reduced-motion:reduce){
  .marquee-track,.marquee-track.reverse{animation:none}
}

/* ---------- process ---------- */
.process{background:var(--bg-soft)}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:1.2rem;position:relative}
.step{
  text-align:center;padding:1.6rem 1rem;position:relative;
}
.step-badge{
  width:78px;height:78px;margin:0 auto 1rem;border-radius:50%;
  background:#fff;border:1.5px solid var(--line);
  display:flex;align-items:center;justify-content:center;color:var(--indigo);
  box-shadow:var(--shadow);position:relative;
}
.step-badge .num{
  position:absolute;top:-7px;right:-7px;width:26px;height:26px;border-radius:50%;
  background:var(--grad);color:#fff;font-size:.72rem;font-weight:700;
  display:flex;align-items:center;justify-content:center;font-family:var(--font-en);
}
.step h3{font-size:1.05rem;font-weight:700;margin-bottom:.35rem}
.step p{font-size:.88rem;color:var(--muted)}
.step:not(:last-child)::after{
  content:"";position:absolute;top:39px;left:calc(50% + 52px);
  width:calc(100% - 104px);height:0;
  border-top:2px dashed rgba(79,70,229,.3);
}

/* ---------- why us ---------- */
.why-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem}
.why-card{
  display:flex;gap:1.1rem;align-items:flex-start;
  border:1px solid var(--line);border-radius:var(--radius);
  padding:1.7rem;background:#fff;box-shadow:var(--shadow);
  transition:transform .25s,border-color .25s;
}
.why-card:hover{transform:translateY(-4px);border-color:rgba(79,70,229,.35)}
.why-icon{
  flex:none;width:48px;height:48px;border-radius:12px;
  background:var(--grad-soft);display:flex;align-items:center;justify-content:center;color:var(--indigo);
}
.why-card h3{font-size:1.05rem;font-weight:700;margin-bottom:.3rem}
.why-card p{font-size:.92rem;color:var(--muted)}

/* ---------- industries ---------- */
.industries{background:var(--bg-soft)}
.ind-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:1.1rem}
.ind-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:1.5rem 1rem;text-align:center;box-shadow:var(--shadow);
  transition:transform .25s,border-color .25s;
}
.ind-card:hover{transform:translateY(-4px);border-color:rgba(34,201,238,.5)}
.ind-card .why-icon{margin:0 auto .8rem}
.ind-card h3{font-size:.98rem;font-weight:700;margin-bottom:.3rem}
.ind-card p{font-size:.82rem;color:var(--muted);line-height:1.55}

/* ---------- cta band ---------- */
.cta-band{padding:0}
.cta-inner{
  background:var(--grad);border-radius:22px;color:#fff;
  padding:2.6rem 3rem;display:flex;align-items:center;gap:2rem;flex-wrap:wrap;
  box-shadow:0 24px 60px rgba(79,70,229,.35);
  position:relative;overflow:hidden;
}
.cta-inner::after{
  content:"";position:absolute;right:-60px;top:-60px;width:240px;height:240px;
  border-radius:50%;background:rgba(255,255,255,.12);
}
.cta-text{flex:1;min-width:260px}
.cta-text h2{font-size:clamp(1.35rem,2.6vw,1.8rem);font-weight:700;margin-bottom:.35rem}
.cta-text p{opacity:.92;font-size:.98rem}
.btn-white{background:#fff;color:var(--indigo)}
.btn-white:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(0,0,0,.18)}

/* ---------- contact ---------- */
.contact-solo{max-width:720px;margin-inline:auto}

.form-card{
  border:1px solid var(--line);border-radius:var(--radius);
  padding:2rem;background:#fff;box-shadow:var(--shadow-lg);
}
.form-card h3{font-size:1.15rem;font-weight:700;margin-bottom:1.2rem}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.field{margin-bottom:1rem}
.field label{display:block;font-size:.85rem;font-weight:600;margin-bottom:.35rem;color:var(--ink-soft)}
.field input,.field textarea{
  width:100%;border:1.5px solid var(--line);border-radius:10px;
  padding:.7rem .9rem;font:inherit;font-size:1rem;color:var(--ink);
  background:var(--bg-soft);transition:border-color .2s,background .2s;
}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--indigo);background:#fff;
}
.field textarea{min-height:120px;resize:vertical}
.form-note{font-size:.8rem;color:var(--muted);margin-top:.8rem}

/* ---------- footer ---------- */
.site-footer{background:var(--footer);color:#c9cbee;padding:4rem 0 2rem}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:2.5rem;margin-bottom:3rem}
.footer-brand{display:flex;align-items:center;gap:.7rem;margin-bottom:1rem}
.footer-brand img{height:38px}
.footer-brand .wordmark{font-family:var(--font-en);font-weight:700;font-size:1.25rem;color:#fff}
.footer-brand .wordmark span{
  background:linear-gradient(100deg,#7fd6ff,#22c9ee);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.footer-col p{font-size:.9rem;line-height:1.75;color:#a3a6d9}
.footer-col h4{color:#fff;font-size:.92rem;font-weight:700;margin-bottom:1rem;letter-spacing:.04em}
.footer-col ul li{margin-bottom:.6rem}
.footer-col ul a{font-size:.9rem;color:#a3a6d9;transition:color .2s}
.footer-col ul a:hover{color:#fff}
.footer-col address{font-style:normal;font-size:.88rem;color:#a3a6d9;line-height:1.75}
.footer-col address strong{color:#dfe1ff;font-weight:600}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);padding-top:1.6rem;
  display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;
  font-size:.83rem;color:#8d90c8;
}

/* ---------- reveal on scroll ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* ---------- responsive ---------- */
@media (max-width:1000px){
  .nav-links{
    position:fixed;inset:76px 0 auto 0;background:#fff;
    flex-direction:column;padding:1.4rem 6%;gap:1.1rem;align-items:flex-start;
    border-bottom:1px solid var(--line);box-shadow:0 20px 40px rgba(24,20,87,.12);
    transform:translateY(-130%);transition:transform .3s ease;z-index:40;
  }
  .nav-links.open{transform:translateY(0)}
  .nav-links a{width:100%;padding:.55rem 0;font-size:1.02rem}
  .nav-links a.nav-drawer-cta{
    display:inline-flex;justify-content:center;color:#fff;
    margin-top:.4rem;padding:.8rem 1.5rem;font-size:.98rem;
  }
  .nav-toggle{display:block}
  .nav-cta{margin-left:auto}
  .hero-grid{grid-template-columns:1fr;gap:3rem;text-align:center}
  .hero-sub{margin-inline:auto}
  .hero-actions,.hero-trust{justify-content:center}
  .svc-grid{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr 1fr}
  .step:not(:last-child)::after{display:none}
  .ind-grid{grid-template-columns:repeat(3,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:720px){
  .nav{gap:1rem;height:68px}
  .nav-logo img{height:32px}
  .lang-switch{padding:.35rem .75rem}
  .nav-links{inset:68px 0 auto 0}
  .nav-cta .btn{display:none}
  .marquee-track{gap:2.6rem}
  .cloud-track{animation-duration:14s}
  .brand-logo{height:34px}
  .brand-logo.bl-anthropic{height:24px}
  .brand-name{font-size:1rem}
  .ind-grid .ind-card:last-child{grid-column:1/-1}
  .chip{font-size:.78rem;padding:.5rem .8rem}
  .chip-2{right:0}
  .chip-1{left:0}
  html{scroll-padding-top:76px}
  .svc-grid,.why-grid,.form-row{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .ind-grid{grid-template-columns:1fr 1fr}
  .cta-inner{padding:2rem 1.6rem}
  section{padding:4rem 0}
  .footer-grid{grid-template-columns:1fr}
}