/* ============ Design Tokens ============ */
:root{
  --brand-navy:#1A3A6E;
  --brand-blue:#3E8FBF;
  --brand-teal:#7DC4BC;
  --brand-mint:#A7D8D1;
  --brand-sky:#BEDCE8;
  --brand-light:#E8F3F5;
  --ink-900:#1a2535;
  --ink-700:#384860;
  --ink-500:#6b7a90;
  --ink-300:#b5c0d0;
  --bg:#ffffff;
  --bg-soft:#f5fafb;
  --shadow-sm:0 4px 16px rgba(30,80,120,.06);
  --shadow-md:0 10px 30px rgba(30,80,120,.10);
  --shadow-lg:0 20px 60px rgba(30,80,120,.15);
  --radius:14px;
  --container:1200px;
  --serif:'Noto Serif TC', "PingFang TC", "Microsoft JhengHei", serif;
  --sans:'Noto Sans TC', "PingFang TC", "Microsoft JhengHei", sans-serif;
}

/* ============ Reset ============ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{
  font-family:var(--sans);
  color:var(--ink-900);
  background:var(--bg);
  line-height:1.7;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit;transition:all .25s ease}
button{font-family:inherit;cursor:pointer;border:none;background:none}
h1,h2,h3,h4{font-family:var(--serif);font-weight:700;line-height:1.3;color:var(--ink-900)}

/* ============ Utilities ============ */
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:100px 0;position:relative;overflow:hidden}
.section-head{text-align:center;margin-bottom:64px;position:relative;z-index:2}
.eyebrow{
  display:inline-block;
  font-size:13px;letter-spacing:.3em;
  color:var(--brand-blue);
  font-weight:500;
  margin-bottom:14px;
  text-transform:uppercase;
}
.section-title{
  font-size:clamp(28px,4vw,44px);
  margin-bottom:16px;
  color:var(--ink-900);
}
.section-title .accent{color:var(--brand-blue)}
.section-sub{
  font-size:17px;color:var(--ink-500);
  max-width:640px;margin:0 auto;
}

/* ============ Bubble Decorations ============ */
.bubble{
  position:absolute;border-radius:50%;
  pointer-events:none;
  opacity:.55;
  mix-blend-mode:multiply;
}
.bubble.b1{background:var(--brand-teal)}
.bubble.b2{background:var(--brand-sky)}
.bubble.b3{background:var(--brand-mint)}
.bubble.b4{background:#a8c8d8}
@keyframes float{
  0%,100%{transform:translateY(0) rotate(0)}
  50%{transform:translateY(-20px) rotate(5deg)}
}
@keyframes floatSlow{
  0%,100%{transform:translate(0,0)}
  50%{transform:translate(15px,-25px)}
}

/* ============ Header / Nav ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(255,255,255,.85);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(190,220,232,.3);
  transition:all .3s ease;
}
.site-header.scrolled{background:rgba(255,255,255,.95);box-shadow:var(--shadow-sm)}
.nav{
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 24px;
  max-width:var(--container);margin:0 auto;
}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{
  width:44px;height:44px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--brand-navy),var(--brand-blue));
  color:white;font-family:var(--serif);font-weight:900;font-size:18px;
  border-radius:8px;
  letter-spacing:-.02em;
  box-shadow:0 4px 12px rgba(26,58,110,.25);
}
.brand-text{line-height:1.1}
.brand-text .name-en{font-weight:700;font-size:15px;color:var(--brand-navy);letter-spacing:.05em}
.brand-text .name-zh{font-size:12px;color:var(--ink-500);margin-top:2px;letter-spacing:.2em}
.nav-menu{display:flex;align-items:center;gap:36px;list-style:none}
.nav-menu a{font-size:14.5px;color:var(--ink-700);font-weight:500;position:relative}
.nav-menu a::after{
  content:'';position:absolute;bottom:-6px;left:50%;
  width:0;height:2px;background:var(--brand-blue);
  transition:all .3s ease;transform:translateX(-50%);
}
.nav-menu a:hover{color:var(--brand-blue)}
.nav-menu a:hover::after{width:100%}
.nav-menu a.active{color:var(--brand-blue)}
.nav-cta{
  background:var(--brand-navy);color:white;
  padding:10px 22px;border-radius:999px;
  font-size:14px;font-weight:500;
}
.nav-cta:hover{background:var(--brand-blue);transform:translateY(-2px);box-shadow:var(--shadow-md)}
.nav-toggle{display:none;font-size:24px;color:var(--ink-900)}

/* ============ Hero (index) ============ */
.hero{
  min-height:100vh;
  padding:120px 0 80px;
  display:flex;align-items:center;position:relative;
  background:
    radial-gradient(ellipse at 20% 30%, rgba(167,216,209,.35), transparent 55%),
    radial-gradient(ellipse at 85% 70%, rgba(190,220,232,.45), transparent 55%),
    linear-gradient(180deg, #fbfdfe 0%, #f2f8fa 100%);
}
.hero .bubble.b1{width:420px;height:420px;top:-80px;right:-60px;opacity:.35;animation:floatSlow 9s ease-in-out infinite}
.hero .bubble.b2{width:280px;height:280px;top:15%;right:8%;opacity:.4;animation:float 7s ease-in-out infinite}
.hero .bubble.b3{width:200px;height:200px;bottom:10%;left:-40px;opacity:.45;animation:floatSlow 11s ease-in-out infinite}
.hero .bubble.b4{width:150px;height:150px;bottom:25%;left:12%;opacity:.5;animation:float 8s ease-in-out infinite}
.hero-inner{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1.15fr 1fr;gap:60px;align-items:center;
}
.hero-pre{
  display:inline-flex;align-items:center;gap:10px;
  background:rgba(255,255,255,.7);
  border:1px solid rgba(62,143,191,.2);
  padding:8px 16px;border-radius:999px;
  font-size:13px;color:var(--brand-blue);font-weight:500;
  margin-bottom:28px;
  backdrop-filter:blur(6px);
}
.hero-pre .dot{width:8px;height:8px;background:var(--brand-teal);border-radius:50%;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.hero h1{
  font-size:clamp(38px,5.5vw,68px);
  line-height:1.15;letter-spacing:-.01em;
  margin-bottom:24px;
}
.hero h1 .highlight{
  background:linear-gradient(120deg,var(--brand-navy) 0%,var(--brand-blue) 50%,var(--brand-teal) 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-lead{
  font-size:18px;color:var(--ink-700);
  margin-bottom:36px;max-width:520px;
  font-family:var(--sans);line-height:1.9;
}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 30px;border-radius:999px;
  font-size:15px;font-weight:500;
  transition:all .3s ease;
}
.btn-primary{background:var(--brand-navy);color:white;box-shadow:0 8px 24px rgba(26,58,110,.25)}
.btn-primary:hover{background:var(--brand-blue);transform:translateY(-3px);box-shadow:0 14px 32px rgba(62,143,191,.3)}
.btn-ghost{
  background:rgba(255,255,255,.6);color:var(--ink-900);
  border:1px solid rgba(62,143,191,.3);
}
.btn-ghost:hover{background:white;border-color:var(--brand-blue);color:var(--brand-blue);transform:translateY(-3px)}
.btn-light{background:white;color:var(--brand-navy);box-shadow:0 8px 24px rgba(0,0,0,.15)}
.btn-light:hover{transform:translateY(-3px);box-shadow:0 14px 32px rgba(0,0,0,.2);color:var(--brand-blue)}
.btn-outline{background:transparent;color:white;border:1.5px solid rgba(255,255,255,.5)}
.btn-outline:hover{background:white;color:var(--brand-navy);border-color:white;transform:translateY(-3px)}
.hero-stats{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:24px;margin-top:56px;
  max-width:520px;
}
.stat{padding-left:18px;border-left:2px solid var(--brand-teal)}
.stat .num{font-family:var(--serif);font-weight:900;font-size:36px;color:var(--brand-navy);line-height:1}
.stat .num .plus{color:var(--brand-blue)}
.stat .label{font-size:13px;color:var(--ink-500);margin-top:6px;letter-spacing:.05em}

/* Hero Visual */
.hero-visual{position:relative;height:520px}
.orbit{position:absolute;inset:0;display:flex;align-items:center;justify-content:center}
.brand-ring{
  width:280px;height:280px;
  border-radius:50%;
  background:linear-gradient(135deg,rgba(255,255,255,.9),rgba(232,243,245,.7));
  border:1px solid rgba(190,220,232,.5);
  box-shadow:var(--shadow-lg),inset 0 0 60px rgba(255,255,255,.5);
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  position:relative;z-index:3;
  backdrop-filter:blur(10px);
}
.brand-ring .big-logo{
  font-family:var(--serif);font-size:72px;font-weight:900;
  background:linear-gradient(135deg,var(--brand-navy),var(--brand-blue));
  -webkit-background-clip:text;background-clip:text;color:transparent;
  letter-spacing:-.04em;
}
.brand-ring .zh{font-family:var(--serif);font-size:20px;color:var(--ink-700);margin-top:4px;letter-spacing:.15em}
.brand-ring .since{font-size:11px;color:var(--ink-500);margin-top:10px;letter-spacing:.3em}
.service-chip{
  position:absolute;
  padding:12px 20px;
  background:white;border-radius:999px;
  font-size:14px;font-weight:500;color:var(--brand-navy);
  box-shadow:var(--shadow-md);
  border:1px solid rgba(190,220,232,.4);
  z-index:4;
  display:flex;align-items:center;gap:8px;
}
.service-chip::before{content:'';width:7px;height:7px;border-radius:50%;background:var(--brand-teal)}
.service-chip.c1{top:10%;left:10%;animation:float 6s ease-in-out infinite}
.service-chip.c2{top:18%;right:5%;animation:floatSlow 8s ease-in-out infinite}
.service-chip.c3{top:50%;left:-5%;animation:float 7s ease-in-out infinite .5s}
.service-chip.c4{top:55%;right:-5%;animation:floatSlow 9s ease-in-out infinite 1s}
.service-chip.c5{bottom:12%;left:15%;animation:float 6.5s ease-in-out infinite 1.5s}
.service-chip.c6{bottom:8%;right:8%;animation:floatSlow 7.5s ease-in-out infinite}

/* ============ About ============ */
.about{background:var(--bg-soft);position:relative}
.about .bubble.b1{width:380px;height:380px;top:-100px;left:-100px;opacity:.2}
.about .bubble.b2{width:260px;height:260px;bottom:-80px;right:5%;opacity:.25}
.about-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:72px;align-items:center;position:relative;z-index:2}
.about-left .eyebrow{margin-bottom:12px}
.about-left h2{font-size:clamp(28px,3.5vw,40px);margin-bottom:24px;line-height:1.25}
.about-left h2 .accent{color:var(--brand-blue)}
.about-left p{color:var(--ink-700);font-size:16px;margin-bottom:18px;line-height:1.9}
.about-highlights{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:32px}
.highlight-item{
  background:white;padding:22px;border-radius:var(--radius);
  box-shadow:var(--shadow-sm);
  border:1px solid rgba(190,220,232,.4);
  transition:all .3s ease;
}
.highlight-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--brand-teal)}
.highlight-item .icon{
  width:40px;height:40px;border-radius:10px;
  background:linear-gradient(135deg,var(--brand-teal),var(--brand-mint));
  display:flex;align-items:center;justify-content:center;
  color:white;font-size:20px;margin-bottom:14px;font-weight:700;
}
.highlight-item .title{font-family:var(--serif);font-size:17px;font-weight:700;margin-bottom:6px}
.highlight-item .desc{font-size:13.5px;color:var(--ink-500);line-height:1.6}

.timeline{
  background:white;padding:36px;border-radius:20px;
  box-shadow:var(--shadow-md);
  border:1px solid rgba(190,220,232,.4);
  position:relative;
}
.timeline h3{
  font-size:20px;margin-bottom:24px;
  padding-bottom:16px;border-bottom:1px solid rgba(190,220,232,.5);
  display:flex;align-items:center;gap:10px;
}
.timeline h3::before{content:'';width:6px;height:22px;background:linear-gradient(var(--brand-navy),var(--brand-blue));border-radius:3px}
.timeline-list{list-style:none;position:relative;padding-left:24px}
.timeline-list::before{
  content:'';position:absolute;left:6px;top:8px;bottom:8px;
  width:2px;background:linear-gradient(var(--brand-teal),var(--brand-sky));
}
.timeline-item{position:relative;padding:8px 0 8px 16px;font-size:14.5px;color:var(--ink-700)}
.timeline-item::before{
  content:'';position:absolute;left:-22px;top:14px;
  width:12px;height:12px;border-radius:50%;
  background:white;border:3px solid var(--brand-blue);
}
.timeline-item .year{font-family:var(--serif);font-weight:700;color:var(--brand-navy);margin-right:10px}

/* ============ Services ============ */
.services{position:relative}
.services .bubble.b1{width:350px;height:350px;top:-80px;right:-80px;opacity:.25}
.services .bubble.b3{width:240px;height:240px;bottom:10%;left:-60px;opacity:.3}
.services-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;position:relative;z-index:2}
.service-card{
  background:white;border-radius:20px;padding:36px 30px;
  box-shadow:var(--shadow-sm);
  border:1px solid rgba(190,220,232,.3);
  transition:all .4s ease;
  position:relative;overflow:hidden;
}
.service-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--brand-teal),var(--brand-blue));
  transform:scaleX(0);transform-origin:left;
  transition:transform .5s ease;
}
.service-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:var(--brand-teal)}
.service-card:hover::before{transform:scaleX(1)}
.service-icon{
  width:56px;height:56px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  margin-bottom:22px;
  font-family:var(--serif);font-weight:900;font-size:20px;color:white;
  position:relative;
}
.service-icon.s1{background:linear-gradient(135deg,#3E8FBF,#1A3A6E)}
.service-icon.s2{background:linear-gradient(135deg,#7DC4BC,#5AA39B)}
.service-icon.s3{background:linear-gradient(135deg,#A7D8D1,#7DC4BC)}
.service-icon.s4{background:linear-gradient(135deg,#BEDCE8,#3E8FBF)}
.service-icon.s5{background:linear-gradient(135deg,#5AA39B,#1A3A6E)}
.service-icon.s6{background:linear-gradient(135deg,#3E8FBF,#7DC4BC)}
.service-icon.s7{background:linear-gradient(135deg,#1A3A6E,#5AA39B)}
.service-icon.s8{background:linear-gradient(135deg,#7DC4BC,#3E8FBF)}
.service-icon.s9{background:linear-gradient(135deg,#A7D8D1,#3E8FBF)}
.service-card h3{font-size:20px;margin-bottom:10px}
.service-card p{font-size:14.5px;color:var(--ink-500);line-height:1.7}

/* ============ Tech ============ */
.tech{
  background:linear-gradient(135deg,#1A3A6E 0%,#2d5485 50%,#3E8FBF 100%);
  color:white;position:relative;
}
.tech .bubble.b1{width:400px;height:400px;top:-100px;left:-80px;background:rgba(167,216,209,.2);opacity:.4}
.tech .bubble.b2{width:280px;height:280px;bottom:-80px;right:-40px;background:rgba(125,196,188,.25);opacity:.4}
.tech .section-title{color:white}
.tech .section-title .accent{color:var(--brand-mint)}
.tech .section-sub{color:rgba(255,255,255,.75)}
.tech .eyebrow{color:var(--brand-mint)}
.tech-layers{max-width:920px;margin:0 auto;display:flex;flex-direction:column;gap:14px;position:relative;z-index:2}
.layer{display:grid;gap:14px}
.layer-1{grid-template-columns:1.5fr 1fr 1fr 1fr}
.layer-2{grid-template-columns:1.2fr 2fr 1fr}
.layer-3,.layer-4{grid-template-columns:1fr}
.layer-cell{
  background:rgba(255,255,255,.08);
  backdrop-filter:blur(10px);
  border:1px solid rgba(255,255,255,.15);
  padding:22px;border-radius:12px;
  text-align:center;
  font-family:var(--sans);font-weight:500;font-size:15px;
  color:white;
  transition:all .3s ease;
}
.layer-cell:hover{background:rgba(255,255,255,.15);transform:translateY(-2px);border-color:var(--brand-mint)}
.layer-cell .label{font-size:11px;letter-spacing:.25em;opacity:.6;margin-bottom:6px;text-transform:uppercase}
.layer-cell .name{font-family:var(--serif);font-weight:700;font-size:17px}
.layer-cell.accent{background:rgba(125,196,188,.2);border-color:rgba(167,216,209,.4)}
.tech-foot{margin-top:56px;display:grid;grid-template-columns:repeat(4,1fr);gap:20px;max-width:920px;margin-left:auto;margin-right:auto;position:relative;z-index:2}
.tech-pill{
  background:rgba(255,255,255,.08);
  backdrop-filter:blur(10px);
  border:1px solid rgba(255,255,255,.15);
  padding:20px;border-radius:12px;text-align:center;
  transition:all .3s ease;
}
.tech-pill:hover{background:rgba(255,255,255,.15);transform:translateY(-3px)}
.tech-pill .cat{font-size:11px;letter-spacing:.25em;opacity:.6;margin-bottom:10px}
.tech-pill .items{font-family:var(--serif);font-weight:700;font-size:15px;line-height:1.5}

/* ============ Works (Featured) ============ */
.works{background:var(--bg-soft);position:relative}
.works .bubble.b2{width:320px;height:320px;top:-80px;right:-80px;opacity:.3}
.works .bubble.b3{width:220px;height:220px;bottom:-60px;left:5%;opacity:.35}
.works-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;position:relative;z-index:2}
.work-card{
  background:white;border-radius:18px;overflow:hidden;
  box-shadow:var(--shadow-sm);
  border:1px solid rgba(190,220,232,.3);
  transition:all .4s ease;
  display:flex;flex-direction:column;
}
.work-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.work-visual{
  height:180px;position:relative;
  background:linear-gradient(135deg,#A7D8D1,#3E8FBF);
  display:flex;align-items:center;justify-content:center;
  overflow:hidden;
}
.work-visual.v2{background:linear-gradient(135deg,#BEDCE8,#7DC4BC)}
.work-visual.v3{background:linear-gradient(135deg,#7DC4BC,#1A3A6E)}
.work-visual.v4{background:linear-gradient(135deg,#3E8FBF,#A7D8D1)}
.work-visual.v5{background:linear-gradient(135deg,#1A3A6E,#3E8FBF)}
.work-visual.v6{background:linear-gradient(135deg,#A7D8D1,#BEDCE8,#3E8FBF)}
.work-visual::before,.work-visual::after{content:'';position:absolute;border-radius:50%;background:rgba(255,255,255,.25)}
.work-visual::before{width:140px;height:140px;top:-40px;right:-40px}
.work-visual::after{width:90px;height:90px;bottom:-30px;left:-30px;background:rgba(255,255,255,.18)}
.work-visual .wtitle{
  position:relative;z-index:2;
  font-family:var(--serif);font-weight:900;font-size:26px;color:white;
  text-shadow:0 2px 20px rgba(0,0,0,.15);
  letter-spacing:.05em;
}
.work-body{padding:24px 26px}
.work-tag{display:inline-block;font-size:11px;letter-spacing:.2em;color:var(--brand-blue);font-weight:600;margin-bottom:8px;text-transform:uppercase}
.work-body h3{font-size:19px;margin-bottom:8px;line-height:1.4}
.work-body p{font-size:13.5px;color:var(--ink-500);line-height:1.7}
.works-cta{text-align:center;margin-top:56px;position:relative;z-index:2}

/* ============ Clients ============ */
.clients{position:relative}
.clients .bubble.b1{width:280px;height:280px;top:-60px;right:-40px;opacity:.2}
.clients-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;max-width:1040px;margin:0 auto;position:relative;z-index:2}
.client-card{
  background:white;padding:28px 20px;border-radius:14px;
  box-shadow:var(--shadow-sm);
  border:1px solid rgba(190,220,232,.3);
  text-align:center;
  transition:all .3s ease;
  min-height:100px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
}
.client-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--brand-teal)}
.client-card .zh{font-family:var(--serif);font-weight:700;font-size:15px;color:var(--ink-900);line-height:1.3}
.client-card .en{font-size:11px;color:var(--ink-500);margin-top:4px;letter-spacing:.1em}

/* ============ Contact ============ */
.contact{background:linear-gradient(180deg,var(--bg-soft),white);position:relative}
.contact .bubble.b1{width:320px;height:320px;bottom:-80px;left:-60px;opacity:.3}
.contact .bubble.b2{width:200px;height:200px;top:10%;right:8%;opacity:.35}
.contact-wrap{display:grid;grid-template-columns:1fr 1.2fr;gap:60px;max-width:1080px;margin:0 auto;position:relative;z-index:2;align-items:start}
.contact-info h3{font-size:28px;margin-bottom:18px;line-height:1.3}
.contact-info h3 .accent{color:var(--brand-blue)}
.contact-info > p{color:var(--ink-700);margin-bottom:32px;font-size:15.5px}
.info-list{list-style:none;display:flex;flex-direction:column;gap:18px}
.info-item{
  display:flex;gap:14px;align-items:flex-start;
  padding:16px;border-radius:12px;
  background:rgba(255,255,255,.6);
  border:1px solid rgba(190,220,232,.4);
  transition:all .3s ease;
}
.info-item:hover{background:white;transform:translateX(4px);border-color:var(--brand-teal)}
.info-ico{
  width:42px;height:42px;border-radius:10px;
  background:linear-gradient(135deg,var(--brand-navy),var(--brand-blue));
  color:white;display:flex;align-items:center;justify-content:center;
  flex-shrink:0;font-weight:700;font-size:16px;
}
.info-text .lbl{font-size:12px;color:var(--ink-500);letter-spacing:.15em;margin-bottom:2px}
.info-text .val{font-size:15px;color:var(--ink-900);font-weight:500}

.form-card{background:white;padding:40px;border-radius:20px;box-shadow:var(--shadow-md);border:1px solid rgba(190,220,232,.4)}
.form-card h4{font-size:22px;margin-bottom:24px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}
.form-field{display:flex;flex-direction:column}
.form-field.full{grid-column:1/-1}
.form-field label{font-size:13px;color:var(--ink-700);margin-bottom:6px;font-weight:500}
.form-field input,.form-field textarea,.form-field select{
  padding:12px 14px;border:1px solid rgba(190,220,232,.6);
  border-radius:10px;font-size:14.5px;font-family:inherit;
  background:var(--bg-soft);transition:all .25s ease;
  color:var(--ink-900);
}
.form-field input:focus,.form-field textarea:focus,.form-field select:focus{
  outline:none;border-color:var(--brand-blue);
  background:white;box-shadow:0 0 0 4px rgba(62,143,191,.12);
}
.form-field textarea{resize:vertical;min-height:110px}
.form-submit{
  width:100%;padding:14px;border-radius:999px;
  background:linear-gradient(135deg,var(--brand-navy),var(--brand-blue));
  color:white;font-size:15px;font-weight:600;
  margin-top:8px;cursor:pointer;
  transition:all .3s ease;
  border:none;
}
.form-submit:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}
.form-honeypot{position:absolute;left:-9999px;height:0;width:0;overflow:hidden}

/* ============ Page Hero (projects) ============ */
.page-hero{
  padding:160px 0 80px;position:relative;
  background:
    radial-gradient(ellipse at 20% 30%, rgba(167,216,209,.35), transparent 55%),
    radial-gradient(ellipse at 85% 70%, rgba(190,220,232,.45), transparent 55%),
    linear-gradient(180deg, #fbfdfe 0%, #f2f8fa 100%);
  text-align:center;
  overflow:hidden;
}
.page-hero .bubble.b1{width:380px;height:380px;top:-100px;right:-80px;opacity:.3}
.page-hero .bubble.b2{width:240px;height:240px;bottom:-60px;left:-40px;opacity:.4}
.page-hero .bubble.b3{width:180px;height:180px;top:30%;left:8%;opacity:.45}
.page-hero .container{position:relative;z-index:2}
.crumbs{font-size:13px;color:var(--ink-500);margin-bottom:18px;letter-spacing:.1em}
.crumbs a{color:var(--brand-blue)}
.crumbs a:hover{color:var(--brand-navy)}
.page-hero h1{font-size:clamp(36px,5vw,56px);margin-bottom:20px;letter-spacing:-.01em}
.page-hero h1 .accent{color:var(--brand-blue)}
.page-hero p{font-size:17px;color:var(--ink-500);max-width:680px;margin:0 auto}

.page-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;max-width:760px;margin:48px auto 0}
.pstat{
  background:rgba(255,255,255,.7);backdrop-filter:blur(8px);
  border:1px solid rgba(190,220,232,.4);
  padding:22px 14px;border-radius:14px;text-align:center;
}
.pstat .num{font-family:var(--serif);font-weight:900;font-size:34px;color:var(--brand-navy);line-height:1}
.pstat .num .plus{color:var(--brand-blue)}
.pstat .label{font-size:12.5px;color:var(--ink-500);margin-top:6px;letter-spacing:.05em}

/* ============ Filters & Projects ============ */
.filters-wrap{
  background:white;border-bottom:1px solid rgba(190,220,232,.4);
  position:sticky;top:80px;z-index:40;
  box-shadow:var(--shadow-sm);
}
.filters{display:flex;gap:8px;padding:18px 0;flex-wrap:wrap;justify-content:center}
.filter-btn{
  padding:8px 18px;border:1px solid rgba(190,220,232,.5);
  border-radius:999px;font-size:13.5px;color:var(--ink-700);
  background:white;font-weight:500;cursor:pointer;
  transition:all .25s ease;
  text-decoration:none;
  display:inline-block;
}
.filter-btn:hover{border-color:var(--brand-blue);color:var(--brand-blue)}
.filter-btn.active{background:var(--brand-navy);color:white;border-color:var(--brand-navy)}

.projects-section{padding:80px 0 100px;position:relative;background:var(--bg-soft)}
.projects-section .bubble.b1{width:280px;height:280px;top:5%;right:-60px;opacity:.2}
.projects-section .bubble.b3{width:220px;height:220px;bottom:5%;left:-40px;opacity:.25}

.year-group{margin-bottom:60px;position:relative;z-index:2}
.year-header{display:flex;align-items:center;gap:18px;margin-bottom:28px}
.year-badge{font-family:var(--serif);font-weight:900;font-size:36px;color:var(--brand-navy);letter-spacing:-.02em}
.year-line{flex:1;height:2px;background:linear-gradient(90deg,var(--brand-teal),transparent)}
.year-count{
  background:white;border:1px solid rgba(190,220,232,.5);
  padding:6px 14px;border-radius:999px;
  font-size:12.5px;color:var(--ink-700);font-weight:500;
}

.projects-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(320px,1fr));
  gap:20px;
}
.project-card{
  background:white;border-radius:16px;padding:26px;
  border:1px solid rgba(190,220,232,.4);
  box-shadow:var(--shadow-sm);
  transition:all .35s ease;
  display:flex;flex-direction:column;
  position:relative;overflow:hidden;
}
.project-card::before{
  content:'';position:absolute;left:0;top:0;bottom:0;width:4px;
  background:linear-gradient(var(--brand-teal),var(--brand-blue));
  transform:scaleY(0);transform-origin:top;
  transition:transform .35s ease;
}
.project-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md);border-color:var(--brand-teal)}
.project-card:hover::before{transform:scaleY(1)}
.project-meta{
  display:flex;justify-content:space-between;align-items:center;
  margin-bottom:14px;
  padding-bottom:14px;
  border-bottom:1px dashed rgba(190,220,232,.5);
}
.project-date{font-size:12.5px;color:var(--ink-500);letter-spacing:.05em}
.project-cat{
  font-size:11px;color:white;background:var(--brand-blue);
  padding:3px 10px;border-radius:999px;letter-spacing:.05em;
  font-weight:500;
}
.project-cat.app{background:#7DC4BC}
.project-cat.web{background:#3E8FBF}
.project-cat.eip{background:#1A3A6E}
.project-cat.iot{background:#5A9F95}
.project-cat.intg{background:#5479a8}
.project-cat.bpm{background:#7488B5}
.project-card h3{font-size:18px;margin-bottom:6px;line-height:1.4}
.project-client{font-size:13px;color:var(--brand-blue);font-weight:500;margin-bottom:12px}
.project-desc{font-size:13.5px;color:var(--ink-500);line-height:1.7;flex:1}
.tech-tags{
  display:flex;gap:6px;flex-wrap:wrap;margin-top:14px;
  padding-top:14px;border-top:1px dashed rgba(190,220,232,.5);
}
.tech-tag{
  font-size:11px;color:var(--ink-700);
  background:var(--bg-soft);padding:3px 9px;border-radius:6px;
  border:1px solid rgba(190,220,232,.4);
}

/* ============ CTA Banner ============ */
.cta-banner{
  padding:80px 0;
  background:linear-gradient(135deg,#1A3A6E 0%,#2d5485 50%,#3E8FBF 100%);
  position:relative;overflow:hidden;color:white;text-align:center;
}
.cta-banner .bubble.b1{width:400px;height:400px;top:-120px;right:-80px;background:rgba(167,216,209,.2);opacity:.4}
.cta-banner .bubble.b3{width:280px;height:280px;bottom:-100px;left:-60px;background:rgba(125,196,188,.2);opacity:.4}
.cta-banner .container{position:relative;z-index:2}
.cta-banner h2{color:white;font-size:clamp(28px,4vw,40px);margin-bottom:16px}
.cta-banner h2 .accent{color:var(--brand-mint)}
.cta-banner p{color:rgba(255,255,255,.8);font-size:16px;margin-bottom:32px;max-width:600px;margin-left:auto;margin-right:auto}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ============ Footer ============ */
.footer{background:#0f1e33;color:rgba(255,255,255,.7);padding:56px 0 24px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.foot-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.foot-brand .brand-mark{box-shadow:none}
.foot-brand .name-en{color:white;font-weight:700;font-size:16px}
.foot-brand .name-zh{color:rgba(255,255,255,.6);font-size:12px;margin-top:2px;letter-spacing:.2em}
.foot-desc{font-size:13.5px;line-height:1.8;color:rgba(255,255,255,.55)}
.foot-title{color:white;font-family:var(--serif);font-weight:700;font-size:15px;margin-bottom:16px;letter-spacing:.05em}
.foot-links{list-style:none;display:flex;flex-direction:column;gap:10px}
.foot-links a{font-size:13.5px;color:rgba(255,255,255,.6)}
.foot-links a:hover{color:var(--brand-mint)}
.foot-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:20px;display:flex;justify-content:space-between;align-items:center;font-size:12.5px;color:rgba(255,255,255,.4);flex-wrap:wrap;gap:10px}

/* ============ Reveal ============ */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .9s ease,transform .9s ease}
.reveal.in{opacity:1;transform:translateY(0)}

/* ============ Responsive ============ */
@media (max-width:960px){
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .hero-visual{height:440px;max-width:440px;margin:0 auto}
  .about-grid{grid-template-columns:1fr;gap:40px}
  .services-grid{grid-template-columns:repeat(2,1fr)}
  .works-grid{grid-template-columns:repeat(2,1fr)}
  .clients-grid{grid-template-columns:repeat(3,1fr)}
  .contact-wrap{grid-template-columns:1fr;gap:40px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:30px}
  .layer-1{grid-template-columns:repeat(2,1fr)}
  .layer-2{grid-template-columns:1fr 1fr}
  .tech-foot{grid-template-columns:repeat(2,1fr)}
  .page-stats{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:640px){
  .section{padding:72px 0}
  .nav-menu{display:none;position:absolute;top:100%;left:0;right:0;background:white;flex-direction:column;padding:20px;box-shadow:var(--shadow-md);gap:16px;align-items:flex-start}
  .nav-menu.open{display:flex}
  .nav-toggle{display:block}
  .hero{padding:100px 0 60px;min-height:auto}
  .hero h1{font-size:36px}
  .hero-visual{height:380px}
  .brand-ring{width:220px;height:220px}
  .brand-ring .big-logo{font-size:56px}
  .service-chip{font-size:12px;padding:8px 14px}
  .services-grid{grid-template-columns:1fr}
  .works-grid{grid-template-columns:1fr}
  .clients-grid{grid-template-columns:repeat(2,1fr)}
  .about-highlights{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .form-card{padding:28px 24px}
  .foot-grid{grid-template-columns:1fr}
  .hero-stats{grid-template-columns:repeat(3,1fr);gap:14px}
  .stat .num{font-size:28px}
  .filters-wrap{position:static}
  .year-badge{font-size:28px}
  .page-hero{padding:130px 0 60px}
}