:root{
  --ink:#22272E; --ink-900:#191D23; --teal:#1ED6C8; --teal-700:#13A99E; --teal-300:#5FE9DE;
  --paper:#F2F0E6; --white:#fff; --muted:#8A93A0; --border:#2C333B;
  --grad:linear-gradient(90deg,#13A99E 0%,#1ED6C8 50%,#5FE9DE 100%);
  --radius:16px; --max:1180px; --mono:"JetBrains Mono",monospace;
  /* 環境部 PM2.5 / AQI 顏色 */
  --aqi-green:#00B050; --aqi-yellow:#F2C400; --aqi-orange:#FF7E00; --aqi-red:#FF2D2D; --aqi-purple:#8F3F97; --aqi-maroon:#7E0023;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Inter","Noto Sans TC",system-ui,"PingFang TC","Microsoft JhengHei",sans-serif;font-size:17px;line-height:1.7;color:var(--ink);background:var(--paper);overflow-x:hidden}
h1,h2,h3{font-family:"Poppins","Noto Sans TC",sans-serif;font-weight:700;letter-spacing:-.02em}
h1{font-size:clamp(2.4rem,6vw,4.2rem);line-height:1.06}
h2{font-size:clamp(1.7rem,4vw,2.4rem);line-height:1.18}
h3{font-size:clamp(1.2rem,3vw,1.4rem)}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
.mono{font-family:var(--mono)}
.tag-mono{font-family:var(--mono);font-size:.78rem;letter-spacing:.12em;text-transform:uppercase}
.btn{display:inline-flex;align-items:center;gap:8px;border:none;border-radius:999px;padding:15px 30px;font-family:"Poppins","Noto Sans TC",sans-serif;font-weight:600;font-size:1rem;cursor:pointer;text-decoration:none;transition:transform .15s,box-shadow .15s}
.btn-primary{background:var(--grad);color:#0E1419}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(30,214,200,.4)}
.btn-ghost{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.45);backdrop-filter:blur(4px)}
.btn-ghost:hover{border-color:var(--teal);color:var(--teal)}
.preview-note{position:relative;z-index:60;background:#0E1419;color:var(--teal);text-align:center;font-size:.8rem;padding:8px}

/* nav */
header.nav{position:fixed;top:0;left:0;right:0;z-index:50;transition:background .3s}
header.nav.solid{background:rgba(25,29,35,.92);backdrop-filter:blur(10px)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand img{height:44px;border-radius:6px;display:block}
header.nav .brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none}
header.nav .brand::after{content:"維碩科技";color:#fff;font-family:"Poppins","Noto Sans TC",sans-serif;font-weight:600;font-size:1.06rem;letter-spacing:.02em;line-height:1;padding-left:12px;border-left:1px solid rgba(255,255,255,.28)}
@media(max-width:480px){header.nav .brand::after{display:none}}
.menu{display:flex;gap:26px;list-style:none}
.menu a{color:#fff;text-decoration:none;font-size:.95rem;font-weight:500;opacity:.92;text-shadow:0 1px 6px rgba(0,0,0,.4)}
.menu a:hover{color:var(--teal)}
.nav-right{display:flex;align-items:center;gap:16px}
.lang{color:#e7e9ec;font-size:.85rem;text-shadow:0 1px 6px rgba(0,0,0,.4)}.lang b{color:#fff}
.hamburger{display:none;background:none;border:none;color:#fff;font-size:1.6rem;cursor:pointer}

/* ===== SCROLL STORY ===== */
.story{position:relative;height:300vh}
.sticky{position:sticky;top:0;height:100vh;overflow:hidden;display:flex;align-items:center;justify-content:center}

/* layer 1: dusty construction scene */
.dusty{position:absolute;inset:0;background:linear-gradient(180deg,#6d6757 0%,#7c715b 45%,#8f8266 100%);will-change:opacity}
.dusty .haze{position:absolute;inset:0;background:
  radial-gradient(55% 50% at 28% 42%,rgba(190,176,142,.9),transparent 62%),
  radial-gradient(50% 50% at 76% 56%,rgba(168,154,124,.85),transparent 62%),
  radial-gradient(70% 60% at 50% 82%,rgba(150,138,110,.8),transparent 66%);
  filter:blur(10px);animation:drift 18s ease-in-out infinite alternate}
@keyframes drift{0%{transform:translateX(-3%) scale(1.02)}100%{transform:translateX(4%) scale(1.06)}}

/* layer 2: bright sustainable sky */
.sky{position:absolute;inset:0;opacity:0;background:linear-gradient(180deg,#7ec5f4 0%,#a9dbf7 45%,#dff1ff 100%);will-change:opacity}
.sky .sun{position:absolute;top:8%;right:12%;width:160px;height:160px;border-radius:50%;
  background:radial-gradient(circle,#fff7d6 0%,#ffe9a3 40%,rgba(255,233,163,0) 72%);filter:blur(2px)}
.sky .sun::after{content:"";position:absolute;inset:-40px;border-radius:50%;background:radial-gradient(circle,rgba(255,246,207,.5),transparent 70%);animation:glow 4s ease-in-out infinite alternate}
@keyframes glow{0%{transform:scale(1);opacity:.7}100%{transform:scale(1.15);opacity:1}}
.sky .rays{position:absolute;top:-20%;right:0%;width:70vw;height:70vw;
  background:repeating-conic-gradient(from 0deg at 88% 18%,rgba(255,255,255,.18) 0deg 4deg,transparent 4deg 12deg);
  mix-blend-mode:screen;animation:spin 90s linear infinite;opacity:.6}
@keyframes spin{to{transform:rotate(360deg)}}
.cloud{position:absolute;background:#fff;border-radius:100px;filter:blur(6px);opacity:.92}
.cloud::before,.cloud::after{content:"";position:absolute;background:#fff;border-radius:100px}
.c1{width:160px;height:42px;top:24%;left:-200px;animation:float1 34s linear infinite}
.c1::before{width:80px;height:70px;top:-30px;left:28px}.c1::after{width:60px;height:54px;top:-22px;left:92px}
.c2{width:120px;height:34px;top:40%;left:-160px;animation:float2 46s linear infinite}
.c2::before{width:60px;height:54px;top:-24px;left:22px}.c2::after{width:46px;height:42px;top:-16px;left:70px}
.c3{width:200px;height:50px;top:14%;left:-260px;animation:float3 58s linear infinite}
.c3::before{width:96px;height:84px;top:-38px;left:36px}.c3::after{width:70px;height:62px;top:-26px;left:118px}
@keyframes float1{to{left:120vw}}@keyframes float2{to{left:120vw}}@keyframes float3{to{left:120vw}}
.sky .ripple{position:absolute;left:0;right:0;bottom:18%;height:40%;
  background:repeating-linear-gradient(180deg,rgba(255,255,255,.16) 0 2px,transparent 2px 9px);
  mask-image:linear-gradient(180deg,transparent,#000);animation:rise 7s ease-in-out infinite alternate;opacity:.5}
@keyframes rise{0%{transform:translateY(8px)}100%{transform:translateY(-8px)}}

/* skyline silhouette (both stages) */
.skyline{position:absolute;bottom:0;left:0;right:0;height:34%;background:rgba(15,20,25,.55);z-index:2;
  clip-path:polygon(0 70%,8% 60%,8% 35%,11% 35%,11% 60%,20% 55%,20% 25%,22% 25%,22% 56%,36% 50%,44% 53%,44% 30%,47% 30%,47% 53%,60% 56%,70% 45%,70% 20%,72% 20%,72% 47%,84% 54%,100% 50%,100% 100%,0 100%)}

/* story content */
.story-content{position:relative;z-index:5;text-align:center;padding:0 24px;max-width:880px;color:#fff;transition:color .4s}
.story-content .eyebrow{font-family:var(--mono);font-size:.82rem;letter-spacing:.16em;text-transform:uppercase;margin-bottom:14px;opacity:.9}
.story-content h1{text-shadow:0 2px 26px rgba(0,0,0,.45);transition:text-shadow .4s}
.story-content .lead{font-size:1.18rem;margin:20px auto 30px;max-width:42ch;text-shadow:0 1px 12px rgba(0,0,0,.4);transition:text-shadow .4s}
/* bright mode → dark legible text */
.story-content.bright{color:#0f2b38}
.story-content.bright h1,.story-content.bright .lead{text-shadow:0 1px 10px rgba(255,255,255,.5)}
.story-content.bright .eyebrow{color:var(--teal-700)}
.story-content h1 .hl{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.cta-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* PM2.5 live badge */
.pm-badge{display:inline-flex;align-items:center;gap:10px;font-family:var(--mono);font-size:.92rem;
  background:rgba(15,20,25,.5);border:1px solid rgba(255,255,255,.28);border-radius:999px;padding:9px 18px;margin-bottom:22px;backdrop-filter:blur(4px);color:#fff;transition:background .4s,border-color .4s}
.story-content.bright .pm-badge{background:rgba(255,255,255,.7);border-color:rgba(15,40,55,.18);color:#0f2b38}
.pm-badge .dot{width:11px;height:11px;border-radius:50%;background:var(--aqi-red);box-shadow:0 0 10px currentColor;transition:background .3s}
.pm-badge b{font-weight:700}

/* stage indicator */
.stages{position:absolute;bottom:30px;left:50%;transform:translateX(-50%);z-index:6;display:flex;gap:14px;align-items:center;
  font-family:var(--mono);font-size:.76rem;color:rgba(255,255,255,.55)}
.stages .s{display:flex;align-items:center;gap:7px;transition:color .3s}
.stages .s .d{width:8px;height:8px;border-radius:50%;background:currentColor}
.stages .s.active{color:#fff}
.story-content.bright ~ .stages{color:rgba(15,43,56,.5)}
.stages .sep{width:22px;height:1px;background:currentColor;opacity:.4}

/* ===== sections ===== */
section{position:relative;z-index:2;padding:96px 0;background:var(--paper)}
.section-head{max-width:60ch;margin:0 auto 48px;text-align:center}
.section-head .tag-mono{color:var(--teal-700)}
.section-head p{color:#5a636d}
.dark{background:var(--ink);color:var(--paper)}.dark .section-head p{color:#aab0b8}.dark .tag-mono{color:var(--teal)}

/* positioning band */
.purpose{background:var(--ink);color:var(--paper);text-align:center;padding:84px 0}
.purpose .accent{display:inline-block;width:52px;height:3px;border-radius:3px;background:var(--grad);margin-bottom:22px}
.purpose h2{max-width:20ch;margin:0 auto}
.purpose h2 .hl{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.purpose p{color:#aab0b8;max-width:52ch;margin:18px auto 0}

/* products (static, readable) */
.modules{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.mod{background:var(--white);border-radius:var(--radius);padding:26px;box-shadow:0 2px 12px rgba(0,0,0,.06);transition:transform .18s,box-shadow .18s;border:1px solid #e7e4d8}
.mod:hover{transform:translateY(-5px);box-shadow:0 16px 40px rgba(30,214,200,.18)}
.mod .ico{width:50px;height:50px;border-radius:13px;background:var(--grad);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.mod .ico svg{width:25px;height:25px;stroke:#0E1419;fill:none;stroke-width:2}
.mod h3{color:var(--ink-900);margin-bottom:8px}.mod p{color:#55606b;font-size:.95rem}
.mod .more{margin-top:14px;display:inline-block;color:var(--teal-700);font-weight:600;text-decoration:none}

/* why */
.why{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.why-item{padding:24px;border:1px solid var(--border);border-radius:var(--radius);background:rgba(34,39,46,.5)}
.why-item .num{font-family:var(--mono);font-weight:700;color:var(--teal);font-size:1.5rem}
.why-item h3{font-size:1.1rem;margin:8px 0 6px}.why-item p{color:#aab0b8;font-size:.92rem}

/* articles marquee (continuous auto-scroll) */
.marquee{position:relative;overflow-x:auto;overflow-y:hidden;-webkit-mask-image:linear-gradient(90deg,transparent,#000 6%,#000 94%,transparent);mask-image:linear-gradient(90deg,transparent,#000 6%,#000 94%,transparent);scrollbar-width:none;cursor:grab;-webkit-overflow-scrolling:touch}
.marquee::-webkit-scrollbar{display:none}
.marquee.dragging{cursor:grabbing}
.marquee-track{display:flex;gap:22px;width:max-content}
.post{flex:0 0 340px;border-radius:var(--radius);overflow:hidden;background:var(--white);border:1px solid #e7e4d8;transition:transform .18s;text-decoration:none;color:inherit;cursor:pointer}
.post:hover{transform:translateY(-4px)}
.post .thumb{aspect-ratio:16/9;background:linear-gradient(135deg,var(--teal-700),var(--ink));position:relative;overflow:hidden}
.post .thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.post .body{padding:20px}.post .date{font-family:var(--mono);color:var(--muted);font-size:.78rem}
.post h3{font-size:1.05rem;margin:7px 0;color:var(--ink-900)}.post p{color:#55606b;font-size:.9rem}

/* press feature (媒體報導) */
.press-card{display:grid;grid-template-columns:1.05fr 1fr;background:var(--white);border:1px solid #e7e4d8;border-radius:var(--radius);overflow:hidden;box-shadow:0 2px 14px rgba(0,0,0,.06);text-decoration:none;color:inherit;transition:box-shadow .18s,transform .18s}
.press-card:hover{box-shadow:0 12px 32px rgba(0,0,0,.12);transform:translateY(-3px)}
.press-card:hover .press-title{color:var(--teal-700)}
.press-media{position:relative;display:block;background:#fff;aspect-ratio:1/1;overflow:hidden}
.press-media img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain}
.press-badge{position:absolute;top:16px;left:16px;font-family:var(--mono);font-size:.72rem;letter-spacing:.04em;background:rgba(14,20,25,.82);color:var(--teal);padding:6px 12px;border-radius:6px}
.press-body{padding:40px 42px;display:flex;flex-direction:column;justify-content:center}
.press-meta{font-family:var(--mono);color:var(--muted);font-size:.8rem;margin-bottom:12px}
.press-kicker{font-family:"Poppins","Noto Sans TC",sans-serif;font-weight:700;color:var(--teal-700);font-size:1.22rem;line-height:1.4;margin-bottom:14px}
.press-title{font-size:1.5rem;line-height:1.35;color:var(--ink-900);margin:0 0 16px;display:block;transition:color .15s}
.press-excerpt{color:#55606b;font-size:.96rem}
.press-quote{margin:22px 0 0;padding:14px 20px;border-left:3px solid var(--teal);background:rgba(30,214,200,.07);border-radius:0 10px 10px 0;color:var(--ink);font-size:.98rem;line-height:1.75}
.press-quote cite{display:block;margin-top:7px;font-style:normal;color:var(--muted);font-size:.84rem}
.press-body .btn{align-self:flex-start;margin-top:26px}
@media(max-width:860px){.press-card{grid-template-columns:1fr}.press-media{min-height:220px}.press-body{padding:28px 24px}.press-title{font-size:1.25rem}}

/* cta + footer */
.cta-band{background:var(--grad);color:#0E1419;text-align:center;padding:76px 0}
.cta-band h2{color:#0E1419}.cta-band .btn-dark{background:var(--ink-900);color:var(--paper);margin-top:24px}
footer{background:var(--ink-900);color:var(--paper);padding:60px 0 26px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px}
footer h4{font-family:"Poppins";font-size:1rem;margin-bottom:16px}
footer a,footer p{color:#aab0b8;text-decoration:none;font-size:.92rem;display:block;margin-bottom:9px}
footer a:hover{color:var(--teal)}
.foot-bottom{border-top:1px solid var(--border);margin-top:36px;padding-top:20px;text-align:center;color:var(--muted);font-size:.84rem}
@media(max-width:1024px){.modules{grid-template-columns:repeat(2,1fr)}.why{grid-template-columns:repeat(2,1fr)}.foot-grid{grid-template-columns:1fr 1fr}}
@media(max-width:768px){section,.purpose{padding:56px 0}.menu{display:none}.hamburger{display:block}.modules,.why{grid-template-columns:1fr}.foot-grid{grid-template-columns:1fr}.sky .sun{width:110px;height:110px}.post{flex-basis:280px}
.menu.open{display:flex;position:absolute;top:68px;left:0;right:0;flex-direction:column;background:var(--ink-900);padding:20px 24px;gap:18px}}
.nav .social-ic{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:8px;background:#1877F2;color:#fff;text-decoration:none;transition:background .15s,color .15s,border-color .15s}.nav .social-ic:hover{filter:brightness(1.1)}.nav .social-ic svg{width:18px;height:18px;fill:currentColor}@media(max-width:768px){.nav .social-ic{width:32px;height:32px}}
.nav .line-btn{display:inline-flex;align-items:center}.nav .line-btn img{height:34px;display:block;border-radius:6px}