/* =============================================================================
   杉銘聯合科技 — Sammy United Technologies
   農極溫暖風設計系統 (綠/棕)
   ============================================================================= */

:root {
    --c-primary: #2D5016;
    --c-primary-dark: #1E3810;
    --c-primary-darker: #14260B;
    --c-secondary: #8B6F47;
    --c-accent: #7FB069;
    --c-accent-soft: #B8D9A8;
    --c-base: #FAF6F0;
    --c-surface: #FFFFFF;
    --c-text: #2C2C2C;
    --c-text-2: #6B6B6B;
    --c-text-3: #9A9A9A;
    --c-border: #E8E2D5;
    --c-border-strong: #D4CDB8;
    --c-danger: #C0392B;
    --c-success: #4A8038;

    --radius: 8px;
    --radius-lg: 16px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,.04), 0 1px 3px rgba(0,0,0,.06);
    --shadow: 0 4px 12px rgba(45,80,22,.08), 0 2px 4px rgba(45,80,22,.04);
    --shadow-lg: 0 12px 32px rgba(45,80,22,.12), 0 4px 12px rgba(45,80,22,.08);

    --font-zh: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
    --font-en: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-serif-zh: "Noto Serif TC", "PingFang TC", serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: var(--font-zh);
    font-size: 16px;
    line-height: 1.7;
    color: var(--c-text);
    background: var(--c-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img, svg { max-width: 100%; height: auto; display: block; }

a { color: var(--c-primary); text-decoration: none; transition: color .15s; }
a:hover { color: var(--c-accent); }

h1,h2,h3,h4 { font-family: var(--font-zh); font-weight: 700; color: var(--c-text); letter-spacing: -.01em; line-height: 1.3; }
h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
.h2 { font-size: 1.75rem; font-weight: 700; margin: 0 0 1rem; }
.h3 { font-size: 1.25rem; font-weight: 700; margin: 0 0 .75rem; }

p { margin: 0 0 1rem; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
.container.narrow { max-width: 800px; }

.skip-link {
    position: absolute; top: -40px; left: 0; background: var(--c-primary); color: #fff;
    padding: 8px 16px; border-radius: 0 0 var(--radius) 0; z-index: 1000;
}
.skip-link:focus { top: 0; }

.text-center { text-align: center; }
.mt-section { margin-top: 3rem; }

/* === Buttons === */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    font-family: var(--font-zh); font-weight: 500; font-size: 1rem;
    padding: .75rem 1.5rem; border-radius: var(--radius);
    border: 2px solid transparent; cursor: pointer;
    transition: all .2s ease; text-decoration: none;
    min-height: 44px;
}
.btn-primary { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }
.btn-primary:hover { background: var(--c-primary-dark); border-color: var(--c-primary-dark); color: #fff; }
.btn-secondary { background: var(--c-surface); color: var(--c-primary); border-color: var(--c-primary); }
.btn-secondary:hover { background: var(--c-primary); color: #fff; }
.btn-outline { background: transparent; color: var(--c-primary); border-color: var(--c-accent); }
.btn-outline:hover { background: var(--c-accent); color: #fff; border-color: var(--c-accent); }
.btn-link { background: transparent; color: var(--c-primary); padding: 0; min-height: auto; font-weight: 600; }
.btn-link:hover { color: var(--c-accent); text-decoration: underline; }
.btn-lg { font-size: 1.125rem; padding: 1rem 2rem; }
.btn-block { width: 100%; }

/* === Header === */
.site-header {
    background: rgba(255,255,255,.96);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--c-border);
    position: sticky; top: 0; z-index: 100;
}
.header-inner {
    display: flex; align-items: center; justify-content: space-between;
    padding: 1rem 1.5rem; max-width: 1200px; margin: 0 auto; gap: 2rem;
}
.site-brand {
    display: flex; align-items: center; gap: .6rem;
    color: var(--c-primary); font-weight: 700; font-size: 1.4rem;
}
.site-brand:hover { color: var(--c-primary-dark); }
.brand-leaf { color: var(--c-accent); flex-shrink: 0; }
.brand-text { display: flex; align-items: baseline; gap: .4rem; }
.brand-zh { font-family: var(--font-serif-zh); font-weight: 700; }
.brand-en { font-family: var(--font-en); font-weight: 600; font-size: .9em; color: var(--c-secondary); }

.primary-nav ul { display: flex; gap: .25rem; list-style: none; margin: 0; padding: 0; align-items: center; }
.primary-nav a {
    display: block; padding: .5rem 1rem; color: var(--c-text); font-weight: 500;
    border-radius: var(--radius); transition: all .15s;
}
.primary-nav a:hover { background: var(--c-base); color: var(--c-primary); }
.primary-nav .nav-cta {
    background: var(--c-primary); color: #fff; padding: .5rem 1.25rem;
}
.primary-nav .nav-cta:hover { background: var(--c-primary-dark); color: #fff; }

.primary-nav .has-submenu { position: relative; }
.primary-nav .submenu {
    position: absolute; top: 100%; left: 0; min-width: 180px;
    background: #fff; box-shadow: var(--shadow-lg);
    border-radius: var(--radius); padding: .5rem; margin-top: .25rem;
    display: none; flex-direction: column;
}
.primary-nav .has-submenu:hover .submenu,
.primary-nav .has-submenu:focus-within .submenu { display: flex; }

.nav-toggle { display: none; }

/* === Hero === */
.hero {
    position: relative;
    padding: 6rem 0 5rem;
    color: #fff;
    overflow: hidden;
}
.hero-bg {
    position: absolute; inset: 0;
    background:
        linear-gradient(135deg, rgba(20,38,11,.92), rgba(45,80,22,.85)),
        radial-gradient(ellipse at top right, rgba(127,176,105,.4), transparent 60%);
    z-index: 0;
}
.hero-bg::after {
    content: ''; position: absolute; inset: 0;
    background-image:
        radial-gradient(circle at 20% 30%, rgba(127,176,105,.15) 0, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(184,217,168,.1) 0, transparent 40%);
}
.hero-inner { position: relative; z-index: 1; text-align: center; }
.hero-eyebrow {
    font-family: var(--font-en); font-size: .85rem; font-weight: 600;
    letter-spacing: .25em; color: var(--c-accent-soft); margin-bottom: 1rem;
}
.hero-title {
    color: #fff; font-size: clamp(2.25rem, 5vw, 3.5rem);
    margin: 0 0 1.5rem; line-height: 1.15; font-weight: 700;
}
.hero-sub {
    color: rgba(255,255,255,.88); font-size: 1.2rem;
    max-width: 600px; margin: 0 auto 2rem;
}
.hero-cta { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
.hero-cta .btn-outline { color: #fff; border-color: rgba(255,255,255,.6); }
.hero-cta .btn-outline:hover { background: rgba(255,255,255,.15); border-color: #fff; }

/* === Section === */
.section { padding: 5rem 0; }
.section-alt { background: var(--c-surface); }
.section-title { font-size: 2.25rem; margin: 0 0 1rem; }
.section-lead {
    font-size: 1.15rem; color: var(--c-text-2);
    max-width: 720px; margin: 0 auto 3rem;
}
.section .section-title.text-center,
.section .section-lead.text-center { text-align: center; }

/* === Values === */
.value-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
}
.value-card {
    background: var(--c-surface); padding: 2rem; border-radius: var(--radius-lg);
    box-shadow: var(--shadow); transition: transform .2s, box-shadow .2s;
}
.value-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.value-icon {
    width: 56px; height: 56px; border-radius: var(--radius);
    background: var(--c-accent-soft); color: var(--c-primary);
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 1rem;
}
.value-card h3 { margin: 0 0 .75rem; font-size: 1.25rem; }
.value-card p { color: var(--c-text-2); margin: 0; }

/* === Products === */
.product-cards {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem; margin-top: 2rem;
}
.product-card {
    background: var(--c-surface); padding: 2.5rem;
    border-radius: var(--radius-lg); box-shadow: var(--shadow);
    border-top: 4px solid var(--c-primary);
    display: flex; flex-direction: column;
}
.product-card .product-tag {
    display: inline-block; font-size: .75rem; font-weight: 600;
    letter-spacing: .15em; color: var(--c-secondary);
    background: var(--c-base); padding: .25rem .75rem;
    border-radius: 99px; margin-bottom: 1rem; align-self: flex-start;
}
.product-name {
    font-family: var(--font-en); font-size: 2rem;
    color: var(--c-primary); margin: 0 0 .25rem;
}
.product-tagline {
    color: var(--c-secondary); font-weight: 600;
    margin: 0 0 1rem; font-size: 1.05rem;
}
.product-desc { color: var(--c-text-2); }
.product-bullets {
    list-style: none; padding: 0; margin: 1rem 0 1.5rem; flex-grow: 1;
}
.product-bullets li {
    padding: .5rem 0 .5rem 1.75rem; position: relative;
    border-bottom: 1px solid var(--c-border);
}
.product-bullets li:last-child { border-bottom: 0; }
.product-bullets li::before {
    content: '✓'; position: absolute; left: 0; top: .5rem;
    color: var(--c-accent); font-weight: 700;
}

/* === About preview === */
.about-preview-grid {
    display: grid; grid-template-columns: 1.2fr 1fr;
    gap: 4rem; align-items: center;
}
.about-stats {
    display: grid; grid-template-columns: 1fr; gap: 1rem;
}
.about-stats .stat {
    background: var(--c-surface); padding: 1.5rem 2rem;
    border-radius: var(--radius); box-shadow: var(--shadow-sm);
    display: flex; align-items: baseline; gap: 1rem;
    border-left: 4px solid var(--c-accent);
}
.stat-num {
    font-family: var(--font-en); font-size: 2rem; font-weight: 700;
    color: var(--c-primary);
}
.stat-label { color: var(--c-text-2); }

/* === CTA Banner === */
.cta-banner {
    background: linear-gradient(135deg, var(--c-primary), var(--c-primary-dark));
    color: #fff; padding: 4rem 0;
}
.cta-banner h2 { color: #fff; margin: 0 0 .5rem; font-size: 1.875rem; }
.cta-banner p { color: rgba(255,255,255,.85); margin: 0; }
.cta-banner-inner {
    display: flex; align-items: center; justify-content: space-between;
    gap: 2rem; flex-wrap: wrap;
}
.cta-banner .btn-primary {
    background: #fff; color: var(--c-primary); border-color: #fff;
}
.cta-banner .btn-primary:hover { background: var(--c-accent-soft); color: var(--c-primary-dark); border-color: var(--c-accent-soft); }

/* === Page Hero (Sub Pages) === */
.page-hero {
    background: linear-gradient(135deg, var(--c-base), var(--c-surface));
    padding: 4rem 0 3rem;
    border-bottom: 1px solid var(--c-border);
}
.page-eyebrow {
    font-family: var(--font-en); font-size: .8rem; font-weight: 600;
    letter-spacing: .25em; color: var(--c-secondary); margin-bottom: .75rem;
}
.page-title {
    font-size: clamp(2rem, 4vw, 2.75rem); margin: 0 0 1rem;
}
.page-lead {
    font-size: 1.15rem; color: var(--c-text-2); max-width: 720px;
}

/* === Product Hero === */
.product-hero {
    background: linear-gradient(135deg, var(--c-base), #ECE4D2);
}
.product-hero-inner {
    display: grid; grid-template-columns: 1.2fr 1fr;
    gap: 3rem; align-items: center;
}
.product-hero-art {
    display: flex; align-items: center; justify-content: center;
}

/* Mock visuals (placeholder until real images) */
.mock-camera {
    width: 100%; max-width: 380px;
    aspect-ratio: 4/3;
    background: #1A1A1A; border-radius: var(--radius-lg);
    padding: 12px; box-shadow: var(--shadow-lg);
    display: flex; align-items: flex-start; justify-content: space-between;
    position: relative; overflow: hidden;
}
.mock-camera::before {
    content: ''; position: absolute; inset: 12px;
    background:
        linear-gradient(135deg, #2a3a1f 0%, #1a2614 100%),
        repeating-linear-gradient(45deg, rgba(127,176,105,.05) 0 2px, transparent 2px 8px);
    border-radius: 6px;
}
.mock-camera-frame {
    position: relative; z-index: 2; width: 100%;
    display: flex; justify-content: space-between; padding: 12px;
}
.mock-tag {
    background: var(--c-danger); color: #fff;
    font-family: var(--font-en); font-size: .7rem; font-weight: 700;
    padding: 4px 10px; border-radius: 4px;
    animation: blink 2s infinite;
}
@keyframes blink { 50% { opacity: .5; } }
.mock-count {
    color: var(--c-accent-soft); font-family: var(--font-en);
    font-size: .85rem; font-weight: 600; background: rgba(0,0,0,.5);
    padding: 4px 10px; border-radius: 4px;
}

.mock-chart {
    width: 100%; max-width: 380px; aspect-ratio: 4/3;
    background: var(--c-surface); border-radius: var(--radius-lg);
    padding: 2rem; box-shadow: var(--shadow-lg);
    display: flex; align-items: flex-end; gap: 12px;
    position: relative;
}
.mock-chart-bar {
    flex: 1; background: linear-gradient(to top, var(--c-primary), var(--c-accent));
    border-radius: 4px 4px 0 0; min-height: 20px;
    transition: height .8s;
}
.mock-chart-label {
    position: absolute; top: 1rem; left: 2rem;
    font-family: var(--font-en); font-size: .8rem; font-weight: 700;
    letter-spacing: .2em; color: var(--c-text-3);
}

/* === Features === */
.feature-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem; margin-top: 2rem;
}
.feature-item {
    background: var(--c-surface); padding: 2rem;
    border-radius: var(--radius-lg); box-shadow: var(--shadow-sm);
}
.feature-num {
    font-family: var(--font-en); font-size: 1rem; font-weight: 700;
    color: var(--c-accent); margin-bottom: .5rem;
}
.feature-item h3 { margin: 0 0 .75rem; font-size: 1.2rem; color: var(--c-primary); }
.feature-item p { color: var(--c-text-2); margin: 0; }

/* === Scenarios === */
.scenario-list, .challenge-list { list-style: none; padding: 0; margin: 1.5rem 0; }
.scenario-list li, .challenge-list li {
    padding: 1rem 0 1rem 1.75rem; position: relative;
    border-bottom: 1px solid var(--c-border);
}
.scenario-list li::before, .challenge-list li::before {
    content: '🌱'; position: absolute; left: 0; top: 1rem;
}
.scenario-list strong, .challenge-list strong {
    color: var(--c-primary); font-size: 1.05rem;
}
.scenario-list p, .challenge-list p { color: var(--c-text-2); margin: .25rem 0 0; }

/* === Architecture diagram === */
.architecture {
    display: flex; align-items: center; justify-content: center;
    gap: 1rem; margin-top: 2rem; flex-wrap: wrap;
}
.arch-step {
    flex: 1 1 200px; max-width: 220px;
    background: var(--c-surface); padding: 1.5rem; border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm); text-align: center;
}
.arch-icon { font-size: 2rem; margin-bottom: .5rem; }
.arch-step h3 { font-size: 1.05rem; color: var(--c-primary); margin: .25rem 0; }
.arch-step p { color: var(--c-text-2); font-size: .9rem; margin: 0; }
.arch-arrow {
    font-size: 1.5rem; color: var(--c-accent); font-weight: 700;
    flex-shrink: 0;
}
@media (max-width: 700px) {
    .arch-arrow { transform: rotate(90deg); }
}

/* === Info table / Info grid === */
.info-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(220px,1fr));
    gap: 1.5rem; margin: 2rem 0;
}
.info-block {
    background: var(--c-surface); padding: 1.5rem; border-radius: var(--radius);
    box-shadow: var(--shadow-sm); border-left: 4px solid var(--c-accent);
}
.info-block h3 { font-size: 1.05rem; color: var(--c-primary); margin: 0 0 .5rem; }
.info-block p { margin: 0; color: var(--c-text-2); }

.info-table {
    width: 100%; border-collapse: collapse; margin: 1rem 0 0;
    background: var(--c-surface); border-radius: var(--radius); overflow: hidden;
    box-shadow: var(--shadow-sm);
}
.info-table th, .info-table td { padding: 1rem; text-align: left; border-bottom: 1px solid var(--c-border); }
.info-table th { background: var(--c-base); width: 30%; font-weight: 600; color: var(--c-text); }
.info-table tr:last-child th, .info-table tr:last-child td { border-bottom: 0; }

/* === Contact === */
.contact-grid {
    display: grid; grid-template-columns: 1.3fr 1fr; gap: 3rem;
}
.contact-form-wrap { background: var(--c-surface); padding: 2.5rem; border-radius: var(--radius-lg); box-shadow: var(--shadow); }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-field { margin-bottom: 1.25rem; }
.form-field label {
    display: block; font-weight: 500; color: var(--c-text);
    margin-bottom: .5rem; font-size: .95rem;
}
.required { color: var(--c-danger); }
.form-field input[type=text], .form-field input[type=email], .form-field input[type=tel], .form-field input[type=password],
.form-field select, .form-field textarea {
    width: 100%; padding: .75rem 1rem; font-family: inherit; font-size: 1rem;
    border: 1px solid var(--c-border-strong); border-radius: var(--radius);
    background: var(--c-surface); color: var(--c-text);
    transition: border-color .15s, box-shadow .15s;
}
.form-field input:focus, .form-field select:focus, .form-field textarea:focus {
    outline: none; border-color: var(--c-accent);
    box-shadow: 0 0 0 3px rgba(127,176,105,.2);
}
.form-field textarea { resize: vertical; min-height: 120px; }
.form-check .check-label {
    display: flex; gap: .5rem; align-items: flex-start; font-weight: normal;
    cursor: pointer; color: var(--c-text-2); font-size: .9rem;
}
.form-check input[type=checkbox] { margin-top: .25rem; }
.field-error {
    display: block; color: var(--c-danger);
    font-size: .85rem; margin-top: .25rem;
}

.alert {
    padding: 1rem 1.25rem; border-radius: var(--radius); margin-bottom: 1.5rem;
}
.alert-success { background: #E6F2E0; color: #2D5016; border-left: 4px solid var(--c-success); }
.alert-danger { background: #FCEAE7; color: #7B241C; border-left: 4px solid var(--c-danger); }

.contact-info {
    background: var(--c-primary); color: #fff; padding: 2.5rem;
    border-radius: var(--radius-lg);
}
.contact-info h2, .contact-info h3 { color: #fff; }
.contact-info a { color: var(--c-accent-soft); }
.contact-info a:hover { color: #fff; }
.contact-info-list { list-style: none; padding: 0; margin: 1.5rem 0 2rem; }
.contact-info-list li {
    padding: .75rem 0; border-bottom: 1px solid rgba(255,255,255,.12);
    display: grid; grid-template-columns: 80px 1fr; gap: 1rem;
}
.contact-info-list li:last-child { border-bottom: 0; }
.ci-label { color: var(--c-accent-soft); font-size: .85rem; font-weight: 600; letter-spacing: .05em; }
.ci-value { color: #fff; }
.contact-tip { background: rgba(0,0,0,.15); padding: 1.25rem; border-radius: var(--radius); }
.contact-tip h3 { font-size: 1rem; margin: 0 0 .25rem; }
.contact-tip p { color: rgba(255,255,255,.8); margin: 0; font-size: .9rem; }

/* === Privacy === */
.privacy-content h2 { font-size: 1.3rem; color: var(--c-primary); margin-top: 2rem; }
.privacy-content .meta { color: var(--c-text-3); font-size: .9rem; }

/* === Footer === */
.site-footer {
    background: var(--c-primary-darker); color: rgba(255,255,255,.75);
    margin-top: 4rem;
}
.footer-inner {
    display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 2rem;
    padding: 3rem 1.5rem 2rem; max-width: 1200px; margin: 0 auto;
}
.footer-brand .footer-name {
    color: #fff; font-weight: 700; font-size: 1.25rem;
    font-family: var(--font-serif-zh);
}
.footer-brand .footer-name-en {
    color: var(--c-accent-soft); font-family: var(--font-en);
    font-size: .9rem; margin-bottom: .75rem;
}
.footer-tagline { color: rgba(255,255,255,.6); font-size: .9rem; margin: 0; }
.footer-col h4 {
    color: #fff; font-size: .9rem; font-weight: 600;
    letter-spacing: .1em; margin: 0 0 1rem; text-transform: uppercase;
}
.footer-col ul, .footer-contact { list-style: none; padding: 0; margin: 0; }
.footer-col li { padding: .35rem 0; font-size: .9rem; }
.footer-col a { color: rgba(255,255,255,.75); }
.footer-col a:hover { color: var(--c-accent-soft); }
.footer-bottom {
    background: rgba(0,0,0,.25);
    padding: 1.25rem 0;
}
.footer-bottom-inner {
    display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1rem;
    font-size: .85rem; color: rgba(255,255,255,.6);
    padding: 0 1.5rem; max-width: 1200px; margin: 0 auto;
}
.footer-bottom a { color: rgba(255,255,255,.7); }

/* === Mobile === */
@media (max-width: 900px) {
    .nav-toggle {
        display: flex; flex-direction: column; gap: 4px;
        background: none; border: 0; padding: 8px; cursor: pointer;
    }
    .nav-toggle span {
        display: block; width: 26px; height: 2px;
        background: var(--c-primary); transition: all .2s;
    }
    .primary-nav {
        display: none; position: absolute; top: 100%; left: 0; right: 0;
        background: #fff; border-top: 1px solid var(--c-border);
        box-shadow: var(--shadow);
    }
    .primary-nav.open { display: block; }
    .primary-nav ul { flex-direction: column; padding: 1rem; }
    .primary-nav .submenu {
        position: static; box-shadow: none; margin-left: 1rem;
        display: flex;
    }
    .product-hero-inner,
    .about-preview-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }
    .form-row { grid-template-columns: 1fr; }
}