/* ==========================================================================
   Chiiwa Creativity Co., Ltd. — 奇瓦創意有限公司
   Global Stylesheet  |  Dark-Tech Theme on Bootstrap 5.3
   Brand palette preserved from legacy site:
     primary  #027DCA   bg #000b14 / #011627   hover #025da0
   ========================================================================== */

/* ----------------------------------------------------------------- Tokens */
:root {
    --c-primary:        #027DCA;
    --c-primary-light:  #2ea3e6;
    --c-primary-dark:   #025da0;
    --c-bg:             #000b14;
    --c-bg-alt:         #011627;
    --c-surface:        #04253c;
    --c-surface-2:      #061f33;
    --c-border:         rgba(2, 125, 202, .18);
    --c-border-strong:  rgba(2, 125, 202, .45);
    --c-text:           #e7eef5;
    --c-muted:          #93a6b8;
    --c-muted-2:        #6c8095;
    --glow:             0 0 22px rgba(2, 125, 202, .55);
    --glow-soft:        0 0 40px rgba(2, 125, 202, .22);

    /* Bootstrap variable overrides */
    --bs-primary:        #027DCA;
    --bs-primary-rgb:    2, 125, 202;
    --bs-body-bg:        #000b14;
    --bs-body-color:     #e7eef5;
    --bs-border-color:   rgba(2, 125, 202, .18);
    --bs-link-color:     #2ea3e6;
    --bs-link-hover-color:#5cbcf0;
    --bs-font-sans-serif:'Noto Sans TC', 'Noto Sans SC', system-ui, sans-serif;
}

/* ----------------------------------------------------------------- Base */
* { scroll-behavior: smooth; }

body {
    font-family: var(--bs-font-sans-serif);
    background-color: var(--c-bg);
    color: var(--c-text);
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

main { flex: 1 0 auto; }

a { text-decoration: none; }

.tech-font { font-family: 'Orbitron', sans-serif; letter-spacing: .04em; }

/* a subtle global circuit/grid texture behind everything */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -2;
    background:
        radial-gradient(1100px 600px at 80% -5%, rgba(2,125,202,.12), transparent 60%),
        radial-gradient(900px 600px at 0% 100%, rgba(2,125,202,.08), transparent 55%);
    pointer-events: none;
}
body::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -2;
    background-image:
        linear-gradient(rgba(2,125,202,.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(2,125,202,.045) 1px, transparent 1px);
    background-size: 46px 46px;
    -webkit-mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 75%);
            mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 75%);
    pointer-events: none;
}

/* ----------------------------------------------------------------- Typography helpers */
.display-hero {
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -.01em;
}
.text-gradient {
    background: linear-gradient(90deg, #5cbcf0, var(--c-primary) 55%, #0a4f7d);
    -webkit-background-clip: text;
            background-clip: text;
    -webkit-text-fill-color: transparent;
}
.text-primary-c   { color: var(--c-primary) !important; }
.text-muted-c     { color: var(--c-muted) !important; }
.eyebrow {
    font-family: 'Orbitron', sans-serif;
    color: var(--c-primary);
    letter-spacing: .28em;
    font-size: .72rem;
    font-weight: 700;
    text-transform: uppercase;
}
.section-title { font-weight: 700; font-size: clamp(1.7rem, 3.4vw, 2.6rem); }
.lead-c { color: var(--c-muted); font-size: 1.05rem; line-height: 1.85; }

/* gradient divider used across sections (echoes legacy footer accent) */
.divider-glow {
    height: 1px;
    width: 90px;
    margin: 1rem 0;
    background: linear-gradient(90deg, transparent, rgba(2,125,202,.8), transparent);
    border: 0;
    opacity: 1;
}
.divider-glow.center { margin-left: auto; margin-right: auto; }

/* ----------------------------------------------------------------- Layout / sections */
.section { padding: 5.5rem 0; position: relative; }
.section-tight { padding: 3.5rem 0; }
.bg-alt   { background: var(--c-bg-alt); }
.bg-grad  {
    background:
        linear-gradient(180deg, rgba(1,22,39,.0), rgba(1,22,39,.6)),
        radial-gradient(700px 320px at 50% 0%, rgba(2,125,202,.14), transparent 70%);
}

/* ----------------------------------------------------------------- Navbar (glassmorphism, legacy look) */
.navbar.nav-glass {
    background: rgba(0, 11, 20, .72);
    -webkit-backdrop-filter: blur(15px);
            backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--c-border);
    transition: background .3s, box-shadow .3s;
}
.navbar.nav-glass.scrolled {
    background: rgba(0, 11, 20, .92);
    box-shadow: 0 8px 30px rgba(0,0,0,.5);
}
.navbar-brand .brand-mark {
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    font-size: 1.3rem;
    color: var(--c-primary);
    line-height: 1;
    letter-spacing: .02em;
}
.navbar-brand .brand-sub {
    font-size: .62rem;
    color: var(--c-muted);
    letter-spacing: .02em;
}
.navbar .nav-link {
    color: var(--c-text);
    font-size: .92rem;
    font-weight: 500;
    margin: 0 .35rem;
    position: relative;
    transition: color .25s;
}
.navbar .nav-link::after {
    content: "";
    position: absolute;
    left: 0; bottom: -2px;
    width: 0; height: 2px;
    background: var(--c-primary);
    transition: width .25s ease;
}
.navbar .nav-link:hover,
.navbar .nav-link:focus { color: var(--c-primary-light); }
.navbar .nav-link:hover::after,
.navbar .nav-link.active::after { width: 100%; }
.navbar .nav-link.active { color: var(--c-primary); font-weight: 700; }
.navbar-toggler { border-color: var(--c-border-strong); }
.navbar-toggler:focus { box-shadow: 0 0 0 .2rem rgba(2,125,202,.35); }

/* language dropdown */
.lang-switch .btn {
    font-size: .78rem;
    border-color: rgba(255,255,255,.25);
    color: var(--c-text);
}
.lang-switch .btn:hover { border-color: var(--c-primary); color: var(--c-primary-light); }
.dropdown-menu {
    background: var(--c-bg-alt);
    border: 1px solid var(--c-border-strong);
    --bs-dropdown-link-color: var(--c-text);
    --bs-dropdown-link-hover-bg: var(--c-primary);
    --bs-dropdown-link-hover-color: #fff;
    --bs-dropdown-link-active-bg: var(--c-primary);
}

/* ----------------------------------------------------------------- Buttons */
.btn { font-weight: 600; border-radius: .4rem; transition: all .28s ease; }
.btn-brand {
    background: var(--c-primary);
    color: #fff;
    border: 1px solid var(--c-primary);
}
.btn-brand:hover {
    background: var(--c-primary-dark);
    color: #fff;
    box-shadow: var(--glow);
    transform: translateY(-2px);
}
.btn-ghost {
    background: transparent;
    color: var(--c-text);
    border: 1px solid rgba(255,255,255,.35);
}
.btn-ghost:hover {
    background: #fff;
    color: #00111f;
    border-color: #fff;
}
.btn-outline-brand {
    color: var(--c-primary-light);
    border: 1px solid var(--c-border-strong);
    background: transparent;
}
.btn-outline-brand:hover {
    color: #fff;
    background: var(--c-primary);
    border-color: var(--c-primary);
    box-shadow: var(--glow);
}

/* ----------------------------------------------------------------- Cards */
.card-tech {
    background: linear-gradient(160deg, var(--c-surface), var(--c-surface-2));
    border: 1px solid var(--c-border);
    border-radius: .9rem;
    padding: 2rem 1.75rem;
    height: 100%;
    position: relative;
    overflow: hidden;
    transition: transform .35s ease, border-color .35s ease, box-shadow .35s ease;
}
.card-tech::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--c-primary), transparent);
    opacity: 0;
    transition: opacity .35s;
}
.card-tech:hover {
    transform: translateY(-8px);
    border-color: var(--c-border-strong);
    box-shadow: var(--glow-soft);
}
.card-tech:hover::before { opacity: 1; }

.icon-badge {
    width: 60px; height: 60px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: .85rem;
    font-size: 1.6rem;
    color: var(--c-primary-light);
    background: rgba(2,125,202,.12);
    border: 1px solid var(--c-border-strong);
    margin-bottom: 1.1rem;
}
.card-tech h3, .card-tech h4, .card-tech h5 { font-weight: 700; }
.card-tech p { color: var(--c-muted); font-size: .95rem; line-height: 1.75; margin: 0; }

/* feature list with check ticks */
.feature-list { list-style: none; padding: 0; margin: 1rem 0 0; }
.feature-list li {
    position: relative;
    padding-left: 1.6rem;
    margin-bottom: .55rem;
    color: var(--c-muted);
    font-size: .92rem;
    line-height: 1.6;
}
.feature-list li::before {
    content: "\f058"; /* fa check-circle */
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    position: absolute;
    left: 0; top: .1rem;
    color: var(--c-primary);
}

/* small pill tags for tech keywords */
.tag-pill {
    display: inline-block;
    font-size: .72rem;
    font-weight: 600;
    letter-spacing: .02em;
    color: var(--c-primary-light);
    background: rgba(2,125,202,.1);
    border: 1px solid var(--c-border);
    border-radius: 999px;
    padding: .28rem .7rem;
    margin: .2rem .25rem .2rem 0;
}

/* ----------------------------------------------------------------- Hero */
.hero {
    position: relative;
    min-height: 92vh;
    display: flex;
    align-items: center;
    padding: 7rem 0 4rem;
    overflow: hidden;
}
.hero-bg-svg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: .55;
    z-index: 0;
    pointer-events: none;
}
.hero .container { position: relative; z-index: 2; }
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .4rem 1rem;
    border-radius: 999px;
    border: 1px solid var(--c-border-strong);
    background: rgba(2,125,202,.08);
    font-size: .8rem;
    color: var(--c-primary-light);
    margin-bottom: 1.5rem;
}
.hero-badge .dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--c-primary);
    box-shadow: 0 0 8px var(--c-primary);
    animation: pulse 1.8s infinite;
}
@keyframes pulse { 0%,100%{opacity:1;} 50%{opacity:.35;} }

/* ----------------------------------------------------------------- Stats */
.stat-num {
    font-family: 'Orbitron', sans-serif;
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    color: #fff;
    line-height: 1;
}
.stat-num .suffix { color: var(--c-primary); }
.stat-label { color: var(--c-muted); font-size: .9rem; margin-top: .5rem; }

/* ----------------------------------------------------------------- Integration flow (HW→FW→SW→Web) */
.flow-wrap { display: flex; flex-wrap: wrap; align-items: stretch; justify-content: center; gap: 0; }
.flow-step {
    flex: 1 1 200px;
    min-width: 180px;
    text-align: center;
    padding: 1.75rem 1.25rem;
    border: 1px solid var(--c-border);
    border-radius: .9rem;
    background: linear-gradient(160deg, var(--c-surface), var(--c-surface-2));
    position: relative;
    transition: transform .3s, box-shadow .3s;
}
.flow-step:hover { transform: translateY(-6px); box-shadow: var(--glow-soft); }
.flow-arrow {
    display: flex; align-items: center; justify-content: center;
    color: var(--c-primary);
    font-size: 1.3rem;
    padding: 0 .35rem;
    flex: 0 0 auto;
}
.flow-step .num { font-family:'Orbitron'; color: var(--c-primary); font-size:.8rem; letter-spacing:.2em; }
@media (max-width: 767px){
    .flow-arrow { transform: rotate(90deg); padding: .4rem 0; }
}

/* ----------------------------------------------------------------- Process timeline */
.timeline { position: relative; padding: 0; list-style: none; margin: 0; }
.timeline::before {
    content: "";
    position: absolute;
    left: 22px; top: 8px; bottom: 8px;
    width: 2px;
    background: linear-gradient(180deg, var(--c-primary), transparent);
}
.timeline li { position: relative; padding: 0 0 2.2rem 64px; }
.timeline li .dot {
    position: absolute; left: 8px; top: 0;
    width: 30px; height: 30px;
    border-radius: 50%;
    background: var(--c-bg);
    border: 2px solid var(--c-primary);
    color: var(--c-primary);
    display: flex; align-items: center; justify-content: center;
    font-family: 'Orbitron'; font-size: .8rem; font-weight: 700;
    box-shadow: var(--glow);
}
.timeline li h5 { font-weight: 700; margin-bottom: .35rem; }
.timeline li p { color: var(--c-muted); font-size: .92rem; margin: 0; }

/* ----------------------------------------------------------------- Tech ecosystem badges */
.eco-badge {
    background: var(--c-surface-2);
    border: 1px solid var(--c-border);
    border-radius: .75rem;
    padding: 1.25rem 1rem;
    text-align: center;
    height: 100%;
    transition: border-color .3s, transform .3s;
}
.eco-badge:hover { border-color: var(--c-border-strong); transform: translateY(-4px); }
.eco-badge i, .eco-badge .eco-mark {
    font-size: 2rem; color: var(--c-primary-light); margin-bottom: .6rem; display: block;
}
.eco-badge .eco-name { font-family:'Orbitron'; font-weight:700; font-size: 1rem; color: #fff; }
.eco-badge .eco-desc { font-size: .8rem; color: var(--c-muted); margin-top: .25rem; }

/* ----------------------------------------------------------------- CTA band */
.cta-band {
    background:
        linear-gradient(120deg, rgba(2,125,202,.16), rgba(2,125,202,.02)),
        var(--c-bg-alt);
    border: 1px solid var(--c-border-strong);
    border-radius: 1.2rem;
    padding: 3rem;
    position: relative;
    overflow: hidden;
}
.cta-band::after {
    content:"";
    position:absolute; right:-40px; top:-40px;
    width: 220px; height: 220px;
    background: radial-gradient(circle, rgba(2,125,202,.35), transparent 70%);
    pointer-events:none;
}

/* ----------------------------------------------------------------- Coming soon */
.coming-soon-wrap { text-align:center; padding: 3rem 1rem; }
.coming-soon-tag {
    font-family:'Orbitron';
    letter-spacing:.35em;
    color: var(--c-primary);
    font-size: clamp(1.6rem, 6vw, 3.2rem);
    font-weight: 700;
    text-shadow: var(--glow);
}

/* ----------------------------------------------------------------- Page banner (interior pages) */
.page-banner {
    padding: 8rem 0 3.5rem;
    background:
        radial-gradient(800px 300px at 70% 0%, rgba(2,125,202,.18), transparent 70%),
        var(--c-bg-alt);
    border-bottom: 1px solid var(--c-border);
}
.breadcrumb-c { font-size: .82rem; color: var(--c-muted-2); }
.breadcrumb-c a { color: var(--c-muted); }
.breadcrumb-c a:hover { color: var(--c-primary); }

/* ----------------------------------------------------------------- Legal / document pages */
.legal-body { color: var(--c-text); line-height: 1.9; }
.legal-body h2 { font-size: 1.3rem; font-weight: 700; margin: 2.2rem 0 .9rem; color: #fff; }
.legal-body h3 { font-size: 1.05rem; font-weight: 700; margin: 1.4rem 0 .6rem; color: var(--c-primary-light); }
.legal-body p, .legal-body li { color: var(--c-muted); }
.legal-body ul, .legal-body ol { padding-left: 1.3rem; }
.legal-body li { margin-bottom: .5rem; }
.legal-toc {
    background: var(--c-surface-2);
    border: 1px solid var(--c-border);
    border-radius: .8rem;
    padding: 1.5rem;
    position: sticky;
    top: 90px;
}
.legal-toc a { color: var(--c-muted); font-size: .9rem; display:block; padding:.3rem 0; }
.legal-toc a:hover { color: var(--c-primary); }

/* ----------------------------------------------------------------- Contact */
.form-control, .form-select {
    background: var(--c-surface-2);
    border: 1px solid var(--c-border);
    color: var(--c-text);
}
.form-control:focus, .form-select:focus {
    background: var(--c-surface-2);
    color: var(--c-text);
    border-color: var(--c-primary);
    box-shadow: 0 0 0 .2rem rgba(2,125,202,.25);
}
.form-control::placeholder { color: var(--c-muted-2); }
.contact-info-item {
    display:flex; gap:1rem; align-items:flex-start; margin-bottom:1.5rem;
}
.contact-info-item .ci-icon {
    flex:0 0 auto; width:46px; height:46px; border-radius:.7rem;
    background: rgba(2,125,202,.12); border:1px solid var(--c-border-strong);
    color: var(--c-primary-light); display:flex; align-items:center; justify-content:center; font-size:1.1rem;
}
.contact-info-item .ci-label{ font-size:.78rem; color:var(--c-muted-2); text-transform:uppercase; letter-spacing:.1em;}
.contact-info-item a, .contact-info-item span.val { color: var(--c-text); }
.contact-info-item a:hover { color: var(--c-primary); }

/* ----------------------------------------------------------------- Footer */
.site-footer {
    background: var(--c-bg);
    border-top: 1px solid rgba(255,255,255,.06);
    padding: 3.5rem 0 1.75rem;
    position: relative;
    z-index: 1;
}
.site-footer h6 {
    font-weight:700; color:#fff; font-size:.95rem; margin-bottom:1.1rem;
    letter-spacing:.02em;
}
.site-footer a { color: var(--c-muted); font-size:.9rem; transition: color .25s; }
.site-footer a:hover { color: var(--c-primary); }
.footer-link-list { list-style:none; padding:0; margin:0; }
.footer-link-list li { margin-bottom:.55rem; }
.footer-contact i { color: var(--c-primary); width: 18px; }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,.06);
    margin-top: 2.5rem; padding-top: 1.5rem;
    color: var(--c-muted-2);
    font-size: .8rem;
}
.footer-brand-mark { font-family:'Orbitron'; color: var(--c-primary); font-weight:700; }
.social-ico {
    width:38px; height:38px; border-radius:50%;
    display:inline-flex; align-items:center; justify-content:center;
    border:1px solid var(--c-border); color:var(--c-muted);
    margin-right:.5rem; transition: all .25s;
}
.social-ico:hover { border-color: var(--c-primary); color:#fff; background: var(--c-primary); box-shadow: var(--glow); }

/* ----------------------------------------------------------------- Scroll reveal */
[data-reveal] {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity .7s ease, transform .7s ease;
    will-change: opacity, transform;
}
[data-reveal].in-view { opacity: 1; transform: none; }
[data-reveal][data-delay="1"] { transition-delay: .1s; }
[data-reveal][data-delay="2"] { transition-delay: .2s; }
[data-reveal][data-delay="3"] { transition-delay: .3s; }
[data-reveal][data-delay="4"] { transition-delay: .4s; }
@media (prefers-reduced-motion: reduce) {
    [data-reveal] { opacity:1; transform:none; transition:none; }
    * { scroll-behavior: auto; }
}

/* ----------------------------------------------------------------- Back to top */
.to-top {
    position: fixed; right: 22px; bottom: 22px;
    width: 46px; height: 46px; border-radius: 50%;
    background: var(--c-primary); color:#fff; border:0;
    display:flex; align-items:center; justify-content:center;
    opacity:0; visibility:hidden; transform: translateY(12px);
    transition: all .3s; z-index: 60; box-shadow: var(--glow);
}
.to-top.show { opacity:1; visibility:visible; transform:none; }
.to-top:hover { background: var(--c-primary-dark); }

/* ----------------------------------------------------------------- Utilities */
.text-balance { text-wrap: balance; }
.min-h-40 { min-height: 40vh; }
.z-2 { position: relative; z-index: 2; }
.border-glow { border:1px solid var(--c-border-strong) !important; }
.bg-surface { background: var(--c-surface-2) !important; }
.rounded-xl { border-radius: 1rem !important; }
.fs-7 { font-size: .85rem; }
.opacity-85 { opacity:.85; }

/* selection */
::selection { background: rgba(2,125,202,.5); color:#fff; }

/* lang visibility helper (only used for elements that opt-in) */
[data-lang-only] { display: none; }

/* scrollbar (webkit) */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--c-bg); }
::-webkit-scrollbar-thumb { background: #0a3a5c; border-radius: 6px; }
::-webkit-scrollbar-thumb:hover { background: var(--c-primary-dark); }

/* ----------------------------------------------------------------- Responsive tweaks */
@media (max-width: 991.98px) {
    .navbar.nav-glass { background: rgba(0,11,20,.95); }
    .navbar-collapse {
        padding: 1rem .25rem .5rem;
    }
    .section { padding: 4rem 0; }
    .cta-band { padding: 2rem 1.4rem; }
}
@media (max-width: 575.98px) {
    .hero { min-height: 88vh; padding-top: 6rem; }
    .card-tech { padding: 1.6rem 1.35rem; }
    .legal-toc { position: static; margin-bottom: 1.5rem; }
}