:root {
    --primary: #1a5fb4;
    --primary-dark: #124a8f;
    --primary-light: #e8f0fb;
    --accent: #d7271c;
    --sky: #34bcea;
    --text: #1f2933;
    --muted: #5f6b7a;
    --line: #e3e8ef;
    --bg-alt: #f5f8fc;
    --dark: #0d1f3c;
    --radius: 14px;
    --shadow: 0 10px 30px rgba(15, 35, 70, .08);
    --header-h: 72px;
    --font: "Microsoft JhengHei", "Noto Sans TC", "PingFang TC", "Heiti TC", system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }

body {
    margin: 0;
    padding-top: var(--header-h);
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.75;
    color: var(--text);
    background: #fff;
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }
h1, h2, h3 { line-height: 1.35; margin: 0 0 .5em; }
p { margin: 0 0 1em; }

.container { width: min(1200px, 100% - 40px); margin-inline: auto; }

.visually-hidden {
    position: absolute !important;
    width: 1px; height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .4em;
    padding: .75em 1.6em;
    border: 2px solid transparent;
    border-radius: 999px;
    font: inherit;
    font-weight: 600;
    line-height: 1.2;
    cursor: pointer;
    transition: background-color .2s, color .2s, border-color .2s, transform .2s;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; }
.btn-outline { border-color: var(--primary); color: var(--primary); background: transparent; }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-sm { padding: .5em 1.2em; font-size: .9rem; }
.btn-block { width: 100%; }
.btn:disabled { opacity: .6; cursor: wait; transform: none; }

.link-arrow { font-weight: 600; }
.link-arrow::after { content: " →"; transition: margin-left .2s; }
.link-arrow:hover::after { margin-left: 4px; }

/* ---------- Header ---------- */
.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    height: var(--header-h);
    z-index: 100;
    background: rgba(255, 255, 255, .96);
    backdrop-filter: saturate(160%) blur(8px);
    transition: box-shadow .2s;
}
.site-header.scrolled { box-shadow: 0 2px 16px rgba(15, 35, 70, .1); }
.header-inner { width: calc(100% - 48px); height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand img { display: block; height: 42px; width: auto; }

.nav-list { list-style: none; margin: 0; padding: 0; display: flex; align-items: center; gap: 6px; }
.nav-list > li > a {
    display: block;
    padding: 8px 12px;
    color: var(--text);
    font-weight: 600;
    font-size: .98rem;
    border-radius: 8px;
}
.nav-list > li > a:hover { color: var(--primary); background: var(--primary-light); }
.nav-list > li.nav-cta > a { color: #fff; margin-left: 6px; padding: .5em 1.2em; border-radius: 999px; }
.nav-list > li.nav-cta > a:hover { color: #fff; background: var(--primary-dark); }

.nav-toggle { display: none; width: 44px; height: 44px; border: 0; background: none; padding: 10px; cursor: pointer; }
.nav-toggle span { display: block; height: 2px; margin: 5px 0; background: var(--text); border-radius: 2px; transition: transform .25s, opacity .25s; }
.nav-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 1080px) {
    .nav-toggle { display: block; }
    .site-nav {
        position: fixed;
        top: var(--header-h);
        left: 0; right: 0;
        max-height: calc(100vh - var(--header-h));
        overflow-y: auto;
        background: #fff;
        border-top: 1px solid var(--line);
        box-shadow: 0 12px 24px rgba(15, 35, 70, .12);
        transform: translateY(-8px);
        opacity: 0;
        visibility: hidden;
        transition: opacity .2s, transform .2s, visibility .2s;
    }
    .nav-open .site-nav { transform: none; opacity: 1; visibility: visible; }
    .nav-list { flex-direction: column; align-items: stretch; padding: 12px 20px 20px; gap: 2px; }
    .nav-list > li > a { padding: 12px; }
    .nav-list > li.nav-cta > a { margin: 10px 0 0; text-align: center; }
}

/* ---------- Hero slider ---------- */
.hero { background: #0d1f3c; }
#slider { overflow: hidden; }
#slider .glider-arrow { width: 28px; height: 28px; }
@media (max-width: 640px) {
    #slider .glider-arrow { width: 16px; height: 16px; border-width: 3px; }
}

/* ---------- Sections ---------- */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head h2 { font-size: clamp(1.8rem, 3vw, 2.4rem); letter-spacing: .06em; }
.section-head h2::after { content: ""; display: block; width: 56px; height: 4px; margin: 14px auto 0; background: var(--accent); border-radius: 2px; }
.section-head p { color: var(--muted); margin-top: 16px; }
.eyebrow { display: block; color: var(--primary); font-weight: 700; font-size: .85rem; letter-spacing: .3em; margin-bottom: 6px; }

@media (max-width: 640px) {
    .section { padding: 64px 0; }
    .section-head { margin-bottom: 36px; }
}

/* ---------- Reveal ---------- */
[data-reveal] { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
[data-reveal].revealed { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    [data-reveal] { opacity: 1; transform: none; transition: none; }
}

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 56px; align-items: center; }
.about-text h3 { font-size: 1.5rem; color: var(--primary-dark); }
.about-text p { color: var(--muted); text-align: justify; }
.stats { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.stats li { background: var(--bg-alt); border-radius: var(--radius); padding: 24px; text-align: center; }
.stats strong { display: block; font-size: 2.4rem; line-height: 1.1; color: var(--primary); }
.stats small { font-size: 1rem; margin-left: 2px; }
.stats span { display: block; margin-top: 8px; color: var(--muted); font-size: .95rem; }

.honors { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 56px; }
.honor { border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.honor h3 { font-size: 1.15rem; padding-left: 12px; border-left: 4px solid var(--accent); }
.honor ul { list-style: none; margin: 16px 0 0; padding: 0; }
.honor li { padding: 10px 0; border-top: 1px dashed var(--line); color: var(--text); }
.honor li:first-child { border-top: 0; }
.honor li span { display: block; color: var(--muted); font-size: .88rem; }

@media (max-width: 900px) {
    .about-grid, .honors { grid-template-columns: 1fr; }
    .about-grid { gap: 32px; }
}

/* ---------- Services ---------- */
.svc-core { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.svc-icon {
    flex: 0 0 auto;
    width: 60px;
    height: 60px;
    display: grid;
    place-items: center;
    border-radius: 16px;
    color: #fff;
}
.svc-icon svg { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.svc-label { display: block; font-size: .75rem; font-weight: 700; letter-spacing: .2em; margin-bottom: 14px; }

.svc-feature {
    position: relative;
    display: flex;
    flex-direction: column;
    padding: 36px 36px 30px;
    border-radius: 20px;
    color: #fff;
    overflow: hidden;
    box-shadow: 0 18px 40px rgba(15, 35, 70, .18);
    transition: transform .25s, box-shadow .25s;
}
.svc-feature::after {
    content: "";
    position: absolute;
    right: -80px;
    top: -80px;
    width: 260px;
    height: 260px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 255, 255, .18), transparent 70%);
    pointer-events: none;
}
.svc-feature:hover { transform: translateY(-4px); box-shadow: 0 24px 48px rgba(15, 35, 70, .24); }
.svc-integration { background: linear-gradient(135deg, #0f3f86, #1a5fb4 55%, #0e9f8e); }
.svc-ai { background: linear-gradient(135deg, #1e1b4b, #4338ca 55%, #2563eb); }
.svc-feature .svc-label { color: rgba(255, 255, 255, .6); }
.svc-feature .svc-icon { background: rgba(255, 255, 255, .16); border: 1px solid rgba(255, 255, 255, .25); }
.svc-head { display: flex; align-items: center; gap: 16px; margin-bottom: 16px; }
.svc-feature h3 { font-size: 1.6rem; margin: 0; }
.svc-feature p { color: rgba(255, 255, 255, .82); }

.svc-chips { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 4px 0 18px; }
.svc-chips span {
    padding: 3px 14px;
    border-radius: 999px;
    font-size: .85rem;
    font-weight: 600;
    background: rgba(255, 255, 255, .14);
    border: 1px solid rgba(255, 255, 255, .28);
}
.svc-chips i { font-style: normal; opacity: .7; }

.svc-points { list-style: none; margin: 0 0 22px; padding: 0; }
.svc-points li { position: relative; padding: 5px 0 5px 26px; }
.svc-points li::before {
    content: "";
    position: absolute;
    left: 2px;
    top: 12px;
    width: 12px;
    height: 7px;
    border-left: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: rotate(-45deg);
    opacity: .85;
}
.svc-link {
    align-self: flex-start;
    margin-top: auto;
    padding: .55em 1.3em;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, .5);
    color: #fff;
    font-weight: 600;
    transition: background-color .2s, color .2s;
}
.svc-link::after { content: " →"; }
.svc-link:hover { background: #fff; color: var(--primary-dark); }
.svc-ai .svc-link:hover { color: #4338ca; }

.svc-base {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 32px;
    margin-top: 24px;
    padding: 32px 36px;
    border-radius: 20px;
    background: #fff;
    box-shadow: var(--shadow);
}
.svc-base-intro { display: flex; gap: 20px; align-items: flex-start; }
.svc-base .svc-icon { background: linear-gradient(135deg, var(--primary), var(--sky)); }
.svc-base .svc-label { color: var(--primary); margin-bottom: 6px; }
.svc-base h3 { font-size: 1.35rem; }
.svc-base p { color: var(--muted); }
.svc-base-group { padding-left: 28px; border-left: 1px solid var(--line); }
.svc-base-group h4 { margin: 4px 0 10px; font-size: 1.05rem; color: var(--primary-dark); }
.svc-base .svc-points { margin: 0; color: var(--text); }
.svc-base .svc-points li::before { border-color: var(--primary); }

@media (max-width: 1000px) {
    .svc-base { grid-template-columns: 1fr 1fr; }
    .svc-base-intro { grid-column: 1 / -1; }
    .svc-base-intro + .svc-base-group { padding-left: 0; border-left: 0; }
}
@media (max-width: 900px) {
    .svc-core { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
    .svc-feature { padding: 28px 24px 24px; }
    .svc-feature h3 { font-size: 1.35rem; }
    .svc-base { grid-template-columns: 1fr; padding: 28px 24px; }
    .svc-base-intro { flex-direction: column; }
    .svc-base-group { padding-left: 0; border-left: 0; }
}

/* ---------- AI solutions ---------- */
.solution-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.solution-card {
    position: relative;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 30px 28px 24px;
    background: #fff;
    overflow: hidden;
    transition: transform .25s, box-shadow .25s, border-color .25s;
}
.solution-card::before {
    content: "";
    position: absolute;
    inset: 0 0 auto 0;
    height: 4px;
    background: linear-gradient(90deg, var(--c1), var(--c2));
}
.solution-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: transparent; }
.solution-icon {
    width: 56px;
    height: 56px;
    display: grid;
    place-items: center;
    border-radius: 16px;
    margin-bottom: 18px;
    color: #fff;
    background: linear-gradient(135deg, var(--c1), var(--c2));
    box-shadow: 0 8px 18px color-mix(in srgb, var(--c1) 30%, transparent);
}
.solution-icon svg { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.solution-card h3 { font-size: 1.25rem; margin-bottom: 10px; }
.solution-card p { color: var(--muted); font-size: .96rem; text-align: justify; }
.solution-card .solution-pain {
    color: var(--text);
    font-weight: 600;
    background: var(--bg-alt);
    border-radius: 10px;
    padding: 8px 12px;
    text-align: left;
}
.solution-pain span {
    display: inline-block;
    margin-right: 8px;
    padding: 0 8px;
    border-radius: 6px;
    font-size: .78rem;
    color: #fff;
    background: var(--c1);
    vertical-align: 1px;
}
.solution-foot {
    margin-top: auto;
    padding-top: 14px;
    border-top: 1px dashed var(--line);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}
.data-tag { font-size: .82rem; color: var(--muted); }
.solution-foot .link-arrow { color: var(--c1); white-space: nowrap; }

.product-strip {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px 32px;
    margin-top: 40px;
    padding: 20px 28px;
    border-radius: var(--radius);
    background: var(--bg-alt);
}
.product-strip-label { font-weight: 700; color: var(--primary-dark); letter-spacing: .1em; }
.product-item { display: flex; align-items: center; gap: 12px; color: var(--text); }
.product-item img { width: 48px; height: 48px; }
.product-item strong { display: block; font-size: 1rem; }
.product-item span { font-size: .88rem; color: var(--muted); line-height: 1.5; }
.product-item:hover strong { color: var(--primary); }

@media (max-width: 1000px) {
    .solution-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
    .solution-grid { grid-template-columns: 1fr; }
    .product-strip { flex-direction: column; align-items: flex-start; }
}

/* ---------- Process ---------- */
.section-dark {
    color: #fff;
    background:
        radial-gradient(1000px 400px at 85% 0%, rgba(52, 188, 234, .25), transparent 60%),
        linear-gradient(135deg, #0d1f3c, #143569);
}
.section-dark .eyebrow { color: var(--sky); }
.section-dark .section-head p { color: rgba(255, 255, 255, .7); }

.process-grid {
    position: relative;
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.process-grid::before {
    content: "";
    position: absolute;
    top: 44px;
    left: 12.5%;
    right: 12.5%;
    height: 2px;
    background: linear-gradient(90deg, rgba(52, 188, 234, .2), rgba(52, 188, 234, .8), rgba(52, 188, 234, .2));
}
.process-step {
    position: relative;
    text-align: center;
    padding: 0 8px;
}
.process-badge {
    position: relative;
    width: 88px;
    height: 88px;
    margin: 0 auto 22px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    color: #fff;
    background: linear-gradient(135deg, #1a5fb4, #34bcea);
    box-shadow: 0 0 0 8px rgba(52, 188, 234, .15), 0 12px 24px rgba(0, 0, 0, .25);
}
.process-badge svg { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.process-badge span {
    position: absolute;
    top: -6px;
    right: -6px;
    min-width: 32px;
    height: 32px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    font-size: .85rem;
    font-weight: 700;
    color: var(--dark);
    background: #fff;
}
.process-step h3 { font-size: 1.25rem; color: #fff; }
.process-step p { color: rgba(255, 255, 255, .72); font-size: .96rem; margin-bottom: 14px; }
.process-output {
    display: inline-block;
    font-size: .85rem;
    color: var(--sky);
    border: 1px solid rgba(52, 188, 234, .45);
    border-radius: 999px;
    padding: 3px 14px;
}
.process-cta { text-align: center; margin-top: 48px; }
.process-cta .btn-primary { background: var(--sky); color: var(--dark); }
.process-cta .btn-primary:hover { background: #fff; color: var(--dark); }

@media (max-width: 900px) {
    .process-grid { grid-template-columns: 1fr 1fr; row-gap: 40px; }
    .process-grid::before { display: none; }
}
@media (max-width: 560px) {
    .process-grid { grid-template-columns: 1fr; }
    .process-step { display: grid; grid-template-columns: 72px 1fr; column-gap: 18px; text-align: left; padding: 0; }
    .process-badge { width: 64px; height: 64px; margin: 0; grid-row: span 3; }
    .process-badge svg { width: 24px; height: 24px; }
    .process-badge span { min-width: 26px; height: 26px; font-size: .75rem; }
    .process-step h3 { margin: 4px 0 4px; }
    .process-output { justify-self: start; }
}

/* ---------- Industries ---------- */
.industry-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.industry-card {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fff;
    overflow: hidden;
    transition: transform .25s, box-shadow .25s, border-color .25s;
}
.industry-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: transparent; }
.industry-photo { position: relative; aspect-ratio: 16 / 10; overflow: hidden; }
.industry-photo img { display: block; width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.industry-card:hover .industry-photo img { transform: scale(1.05); }
.industry-photo span {
    position: absolute;
    left: 12px;
    bottom: 12px;
    padding: 2px 10px;
    border-radius: 999px;
    font-size: .78rem;
    font-weight: 600;
    color: #fff;
    background: rgba(13, 31, 60, .72);
    backdrop-filter: blur(4px);
}
.industry-body { display: flex; flex-direction: column; flex: 1; padding: 22px 22px 20px; }
.industry-body h3 { font-size: 1.25rem; }
.industry-body p { color: var(--muted); font-size: .94rem; text-align: justify; }
.industry-body ul { list-style: none; margin: 0 0 16px; padding: 0; }
.industry-body li { position: relative; padding: 4px 0 4px 24px; font-size: .94rem; }
.industry-body li::before {
    content: "";
    position: absolute;
    left: 2px;
    top: 10px;
    width: 12px;
    height: 7px;
    border-left: 2px solid var(--primary);
    border-bottom: 2px solid var(--primary);
    transform: rotate(-45deg);
}
.industry-body .link-arrow { margin-top: auto; }

.industry-more {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px 12px;
    margin-top: 36px;
    padding: 18px 24px;
    border-radius: var(--radius);
    background: var(--bg-alt);
}
.industry-more-label { font-weight: 700; color: var(--primary-dark); margin-right: 6px; }
.chip { padding: 4px 14px; border-radius: 999px; background: #fff; border: 1px solid var(--line); font-size: .9rem; }
.industry-more .link-arrow { margin-left: auto; }

@media (max-width: 1100px) {
    .industry-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
    .industry-grid { grid-template-columns: 1fr; }
    .industry-more .link-arrow { margin-left: 0; width: 100%; }
}

/* ---------- Contact ---------- */
.section-contact { background: var(--bg-alt); }
.contact-grid { display: grid; grid-template-columns: 1.6fr 1fr; gap: 40px; align-items: stretch; }
.contact-form { background: #fff; border-radius: var(--radius); padding: 40px; box-shadow: var(--shadow); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.field { margin-bottom: 20px; }
.field label { display: block; font-weight: 600; margin-bottom: 6px; }
.field label em { color: var(--accent); font-style: normal; }
.field input, .field textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid #cfd8e3;
    border-radius: 10px;
    font: inherit;
    color: var(--text);
    background: #fff;
    transition: border-color .2s, box-shadow .2s;
}
.field textarea { resize: vertical; min-height: 140px; }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26, 95, 180, .15); }
.field .invalid { border-color: var(--accent); }
.field-error { display: block; min-height: 1.2em; color: var(--accent); font-size: .85rem; margin-top: 4px; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-status { margin: 14px 0 0; min-height: 1.5em; font-weight: 600; text-align: center; }
.form-status.ok { color: #1a7f45; }
.form-status.error { color: var(--accent); }

.contact-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 24px;
    background: linear-gradient(160deg, var(--primary), #0d1f3c);
    color: #fff;
    border-radius: var(--radius);
    padding: 40px 32px;
}
.contact-info img { width: 150px; height: auto; }
.contact-info ul { list-style: none; margin: 0; padding: 0; width: 100%; }
.contact-info li { padding: 12px 0; border-top: 1px solid rgba(255, 255, 255, .2); }
.contact-info li:first-child { border-top: 0; }
.contact-info li span { display: block; font-size: .85rem; opacity: .7; }
.contact-info a { color: #fff; word-break: break-all; }

@media (max-width: 900px) {
    .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
    .form-row { grid-template-columns: 1fr; gap: 0; }
    .contact-form { padding: 28px 20px; }
}

/* ---------- Footer ---------- */
.site-footer { background: #0a172d; color: rgba(255, 255, 255, .75); font-size: .95rem; }
.footer-grid { display: grid; grid-template-columns: 1.6fr repeat(4, 1fr); gap: 32px; padding: 64px 0 48px; }
.footer-brand img { height: 42px; width: auto; background: #fff; border-radius: 8px; padding: 6px 10px; box-sizing: content-box; }
.footer-brand p { margin-top: 16px; }
.site-footer h3 { color: #fff; font-size: 1rem; letter-spacing: .1em; margin-bottom: 14px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: 8px; }
.site-footer a { color: rgba(255, 255, 255, .75); }
.site-footer a:hover { color: #fff; }
.footer-contact li { word-break: break-all; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .1); padding: 18px 0; font-size: .85rem; text-align: center; color: rgba(255, 255, 255, .5); }

@media (max-width: 1000px) {
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 520px) {
    .footer-grid { grid-template-columns: 1fr; }
}

/* ---------- Back to top ---------- */
.to-top {
    position: fixed;
    right: 20px;
    bottom: 20px;
    z-index: 90;
    width: 46px;
    height: 46px;
    border: 0;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    box-shadow: var(--shadow);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity .25s, transform .25s, visibility .25s;
}
.to-top.show { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { background: var(--primary-dark); }

/* ---------- Error page ---------- */
.error-page { text-align: center; }