/* ============================================================
   上海瀚丰化工科技有限公司 - 主样式表
   版本: V1.2 | 构建日期: 2026-05-10
   设计系统: Deep Blue + Accent Blue, Slate Neutrals
   ============================================================ */

:root {
    --c-primary: #174b9e;
    --c-primary-dark: #0d3472;
    --c-primary-light: #1e5fc7;
    --c-accent: #2196f3;
    --c-accent-soft: #e3f0fd;
    --c-bg: #fafbfc;
    --c-bg-alt: #f0f3f7;
    --c-surface: #ffffff;
    --c-text: #1a2332;
    --c-text-secondary: #55677d;
    --c-text-muted: #8899aa;
    --c-border: #e2e8f0;
    --c-border-light: #edf2f7;
    --c-green: #16a34a;
    --c-green-soft: #dcfce7;
    --c-red: #dc2626;
    --c-red-soft: #fef2f2;
    --c-blue-tag: #e0edff;
    --radius-sm: 8px;
    --radius: 14px;
    --radius-lg: 20px;
    --radius-full: 9999px;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow: 0 4px 16px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 8px 30px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 20px 60px rgba(15, 23, 42, 0.10);
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --duration: 400ms;
    --duration-fast: 250ms;
    --max-w: 1280px;
}

/* Resets */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", "Plus Jakarta Sans", system-ui, -apple-system, sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--c-text);
    background: var(--c-bg);
    overflow-x: hidden;
    text-wrap: pretty;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { display: block; max-width: 100%; }
em { font-style: normal; color: var(--c-text-muted); font-size: 0.85em; }

/* Selection */
::selection { background: var(--c-accent-soft); color: var(--c-primary); }

/* ============================================================
   NAV
   ============================================================ */
.nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    transition: background var(--duration) var(--ease-out),
                box-shadow var(--duration) var(--ease-out);
}
.nav.scrolled {
    background: rgba(255,255,255,0.85);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--c-border);
}

.nav-inner {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 32px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 18px;
    color: rgba(255,255,255,0.9);
    letter-spacing: 0.5px;
    transition: color var(--duration) var(--ease-out);
}
.nav.scrolled .nav-brand {
    color: var(--c-text);
}
.nav-logo {
    width: 36px;
    height: 36px;
    border-radius: 6px;
    object-fit: contain;
}

.nav-links {
    display: flex;
    gap: 4px;
}
.nav-links a {
    display: block;
    padding: 8px 16px;
    font-size: 15px;
    font-weight: 500;
    color: rgba(255,255,255,0.7);
    border-radius: var(--radius-sm);
    transition: color var(--duration-fast), background var(--duration-fast);
}
.nav.scrolled .nav-links a {
    color: var(--c-text-secondary);
}
.nav-links a:hover,
.nav-links a.active {
    color: #fff;
    background: rgba(255,255,255,0.12);
}
.nav.scrolled .nav-links a:hover,
.nav.scrolled .nav-links a.active {
    color: var(--c-primary);
    background: var(--c-accent-soft);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}
.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: rgba(255,255,255,0.8);
    border-radius: 2px;
    transition: transform var(--duration-fast), opacity var(--duration-fast), background var(--duration-fast);
}
.nav.scrolled .nav-toggle span {
    background: var(--c-text);
}
.nav-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.lang-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 32px;
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.25);
    border-radius: 9999px;
    color: rgba(255,255,255,0.9);
    font-family: var(--ff-en);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--duration-fast), border-color var(--duration-fast), color var(--duration-fast);
    letter-spacing: 0.02em;
    flex-shrink: 0;
}
.lang-toggle:hover {
    background: rgba(255,255,255,0.2);
    border-color: rgba(255,255,255,0.4);
    color: #fff;
}
.nav.scrolled .lang-toggle {
    background: rgba(15,23,42,0.06);
    border-color: rgba(15,23,42,0.15);
    color: var(--c-text-secondary);
}
.nav.scrolled .lang-toggle:hover {
    background: var(--c-accent-soft);
    border-color: var(--c-accent);
    color: var(--c-primary);
}

/* Hide Chinese-only elements in English mode */
.lang-en .phil-en { display: none; }
.lang-en .footer-name-en { display: none; }

/* ============================================================
   HERO
   ============================================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(160deg, #0a2342 0%, #0d3472 30%, #174b9e 60%, #1a5cb0 100%);
    overflow: hidden;
}

.hero-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0.6;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 120px 32px 80px;
    max-width: 820px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 18px;
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: var(--radius-full);
    color: rgba(255,255,255,0.85);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.5px;
    margin-bottom: 32px;
    backdrop-filter: blur(10px);
    background: rgba(255,255,255,0.06);
}
.hero-badge-dot {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: #4ade80;
    box-shadow: 0 0 8px #4ade80;
}

.hero-title {
    margin-bottom: 28px;
}
.hero-title-line {
    display: block;
    font-size: clamp(36px, 6vw, 60px);
    font-weight: 800;
    color: #fff;
    letter-spacing: 2px;
    line-height: 1.15;
}
.hero-title-sub {
    display: block;
    font-size: clamp(15px, 2vw, 20px);
    font-weight: 400;
    color: rgba(255,255,255,0.6);
    letter-spacing: 2px;
    margin-top: 10px;
    text-transform: uppercase;
}

.hero-desc {
    font-size: clamp(15px, 1.8vw, 18px);
    line-height: 1.9;
    color: rgba(255,255,255,0.7);
    margin-bottom: 44px;
}

.hero-actions {
    display: flex;
    gap: 14px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 36px;
    background: #fff;
    color: var(--c-primary-dark);
    font-size: 16px;
    font-weight: 700;
    border-radius: var(--radius-full);
    transition: transform var(--duration-fast) var(--ease-out),
                box-shadow var(--duration-fast) var(--ease-out);
    border: none;
    cursor: pointer;
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(0,0,0,0.2);
}

.btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 30px;
    background: transparent;
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    border-radius: var(--radius-full);
    border: 1.5px solid rgba(255,255,255,0.3);
    transition: background var(--duration-fast), border-color var(--duration-fast),
                transform var(--duration-fast);
    cursor: pointer;
}
.btn-ghost:hover {
    background: rgba(255,255,255,0.08);
    border-color: rgba(255,255,255,0.6);
    transform: translateY(-2px);
}

.hero-scroll {
    position: absolute;
    bottom: 36px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}
.hero-scroll-line {
    display: block;
    width: 1px;
    height: 48px;
    background: linear-gradient(to bottom, rgba(255,255,255,0.4), transparent);
    animation: scrollPulse 2.5s ease-in-out infinite;
}
@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.6); transform-origin: top; }
    50% { opacity: 1; transform: scaleY(1); transform-origin: top; }
}

/* ============================================================
   SECTIONS
   ============================================================ */
.section { padding: 110px 0; }
.section-alt { background: var(--c-bg-alt); }
.section-container { max-width: var(--max-w); margin: 0 auto; padding: 0 32px; }

.section-label {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 4px;
    color: var(--c-text-muted);
    margin-bottom: 12px;
}
.section-title {
    font-size: clamp(30px, 5vw, 44px);
    font-weight: 800;
    letter-spacing: 1px;
    margin-bottom: 56px;
    color: var(--c-text);
}
.text-accent { color: var(--c-primary); }

/* ============================================================
   ABOUT
   ============================================================ */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 72px;
    align-items: start;
}

.about-lead-text {
    font-size: 17px;
    line-height: 2;
    color: var(--c-text-secondary);
    margin-bottom: 20px;
}
.about-lead-text .text-accent {
    font-weight: 600;
}

.about-metrics {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.metric {
    background: var(--c-surface);
    padding: 32px 24px;
    border-radius: var(--radius);
    border: 1px solid var(--c-border-light);
    text-align: center;
    transition: box-shadow var(--duration) var(--ease-out),
                transform var(--duration) var(--ease-out);
}
.metric:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}
.metric-num {
    display: block;
    font-size: 40px;
    font-weight: 800;
    color: var(--c-primary);
    line-height: 1;
    margin-bottom: 8px;
    letter-spacing: -1px;
}
.metric-plus { font-size: 24px; font-weight: 600; }
.metric-label {
    font-size: 14px;
    color: var(--c-text-muted);
    font-weight: 500;
}

/* ============================================================
   PRODUCTS
   ============================================================ */
.product-block { margin-bottom: 64px; }
.product-block:last-child { margin-bottom: 0; }

.product-block-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 28px;
}
.product-block-icon {
    width: 52px; height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}
.oled-icon { background: #dbeafe; color: var(--c-primary); }
.opv-icon { background: #dcfce7; color: var(--c-green); }

.product-block-header h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--c-text);
    margin-bottom: 2px;
}
.product-block-header p {
    font-size: 14px;
    color: var(--c-text-muted);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}
.card-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }

.card {
    background: var(--c-surface);
    padding: 24px;
    border-radius: var(--radius);
    border: 1px solid var(--c-border-light);
    transition: box-shadow var(--duration) var(--ease-out),
                transform var(--duration) var(--ease-out),
                border-color var(--duration) var(--ease-out);
}
.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
    border-color: #c8d6e5;
}
.card h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--c-text);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}
.card-tag {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 2px 8px;
    border-radius: 4px;
    background: var(--c-blue-tag);
    color: var(--c-primary);
}
.card ul { display: flex; flex-direction: column; gap: 6px; }
.card li {
    font-size: 13.5px;
    color: var(--c-text-secondary);
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 8px;
    line-height: 1.6;
}
.card li em { white-space: nowrap; }
.card li a {
    color: inherit;
    transition: color var(--duration-fast);
}
.card li a:hover { color: var(--c-primary); }

.chip {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    padding: 1px 7px;
    border-radius: 4px;
    margin-left: 4px;
}
.chip-green { background: var(--c-green-soft); color: #15803d; }
.chip-red { background: var(--c-red-soft); color: #b91c1c; }
.chip-blue { background: var(--c-blue-tag); color: var(--c-primary); }

/* ============================================================
   PHILOSOPHY
   ============================================================ */
.phil-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
}

.phil-card {
    background: var(--c-surface);
    padding: 32px 20px 24px;
    border-radius: var(--radius);
    border: 1px solid var(--c-border-light);
    text-align: center;
    transition: box-shadow var(--duration) var(--ease-out),
                transform var(--duration) var(--ease-out),
                border-color var(--duration) var(--ease-out);
}
.phil-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    border-color: #c8d6e5;
}

.phil-icon {
    width: 56px; height: 56px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}
.phil-people  { background: #dbeafe; color: #2563eb; }
.phil-customer { background: #dcfce7; color: #16a34a; }
.phil-quality  { background: #fef3c7; color: #d97706; }
.phil-passion  { background: #fce7f3; color: #db2777; }
.phil-social   { background: #ccfbf1; color: #0d9488; }

.phil-card h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--c-text);
}
.phil-en {
    display: block;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--c-text-muted);
    margin-bottom: 14px;
    font-family: "Plus Jakarta Sans", system-ui, sans-serif;
}
.phil-card p {
    font-size: 13.5px;
    color: var(--c-text-secondary);
    line-height: 1.8;
}

/* ============================================================
   EXPERTISE
   ============================================================ */
.expertise-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}
.expertise-card {
    background: var(--c-surface);
    padding: 32px 24px;
    border-radius: var(--radius);
    border: 1px solid var(--c-border-light);
    transition: box-shadow var(--duration) var(--ease-out),
                transform var(--duration) var(--ease-out);
}
.expertise-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}
.expertise-num {
    display: block;
    font-size: 13px;
    font-weight: 700;
    color: var(--c-primary);
    margin-bottom: 12px;
    letter-spacing: 1px;
    font-family: "Plus Jakarta Sans", system-ui, sans-serif;
}
.expertise-card h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--c-text);
}
.expertise-card p {
    font-size: 14px;
    color: var(--c-text-secondary);
    line-height: 1.8;
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    align-items: stretch;
}

.contact-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

.contact-card {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 22px;
    background: var(--c-surface);
    border-radius: var(--radius);
    border: 1px solid var(--c-border-light);
    transition: box-shadow var(--duration) var(--ease-out),
                transform var(--duration) var(--ease-out);
}
.contact-card:hover {
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}
.contact-card svg {
    flex-shrink: 0;
    color: var(--c-primary);
    margin-top: 2px;
}
.contact-card div { min-width: 0; }
.contact-label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--c-text-muted);
    margin-bottom: 4px;
}
.contact-card span:not(.contact-label),
.contact-card a {
    font-size: 15px;
    font-weight: 500;
    color: var(--c-text);
    word-break: break-all;
}
.contact-card a:hover { color: var(--c-primary); }

.contact-address-card {
    background: var(--c-primary);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
    position: relative;
    overflow: hidden;
}
.contact-address-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 20%, rgba(255,255,255,0.06) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(33,150,243,0.15) 0%, transparent 50%);
    pointer-events: none;
}
.address-visual {
    position: relative;
    width: 80px; height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}
.address-pin {
    width: 14px; height: 14px;
    background: #fff;
    border-radius: 50%;
    position: relative;
    z-index: 1;
    box-shadow: 0 0 20px rgba(255,255,255,0.3);
}
.address-ring {
    position: absolute;
    inset: 0;
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 50%;
    animation: ringPulse 3s ease-in-out infinite;
}
@keyframes ringPulse {
    0%, 100% { transform: scale(1); opacity: 0.4; }
    50% { transform: scale(1.12); opacity: 0.15; }
}
.address-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 16px;
    position: relative;
}
.address-full {
    font-size: 15px;
    line-height: 2;
    opacity: 0.85;
    margin-bottom: 20px;
    position: relative;
}
.address-sub {
    font-size: 12px;
    opacity: 0.5;
    letter-spacing: 1px;
    position: relative;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
    background: #0f172a;
    color: rgba(255,255,255,0.7);
    padding: 64px 0 0;
}
.footer-inner {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 32px;
}
.footer-brand {
    display: flex;
    align-items: center;
    gap: 14px;
    padding-bottom: 32px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    margin-bottom: 32px;
}
.footer-logo {
    width: 48px; height: 48px;
    border-radius: 10px;
    background: #fff;
    padding: 4px;
    object-fit: contain;
}
.footer-name {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 2px;
}
.footer-name-en {
    font-size: 12px;
    opacity: 0.4;
    letter-spacing: 0.5px;
}
.footer-nav {
    display: flex;
    gap: 80px;
    margin-bottom: 32px;
}
.footer-col {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.footer-col span {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    opacity: 0.4;
    margin-bottom: 4px;
}
.footer-col a {
    font-size: 14px;
    color: rgba(255,255,255,0.6);
    transition: color var(--duration-fast);
}
.footer-col a:hover { color: #fff; }
.footer-copy {
    padding: 24px 0;
    font-size: 13px;
    opacity: 0.35;
    border-top: 1px solid rgba(255,255,255,0.06);
    text-align: center;
}

/* ============================================================
   TWEAKS PANEL
   ============================================================ */
.tweaks {
    position: fixed;
    bottom: 24px; right: 24px;
    z-index: 200;
    font-family: "Plus Jakarta Sans", system-ui, sans-serif;
}
.tweaks-toggle {
    width: 44px; height: 44px;
    border-radius: 50%;
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    box-shadow: var(--shadow);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--c-text-secondary);
    transition: all var(--duration-fast);
}
.tweaks-toggle:hover {
    box-shadow: var(--shadow-md);
    color: var(--c-primary);
    transform: scale(1.05);
}
.tweaks-body {
    position: absolute;
    bottom: 56px; right: 0;
    width: 260px;
    background: var(--c-surface);
    border-radius: var(--radius);
    border: 1px solid var(--c-border);
    box-shadow: var(--shadow-lg);
    padding: 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px) scale(0.96);
    transform-origin: bottom right;
    transition: all var(--duration-fast) var(--ease-out);
    pointer-events: none;
}
.tweaks-body.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}
.tweaks-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--c-text-muted);
    border-bottom: 1px solid var(--c-border-light);
}
.tweaks-close {
    background: none; border: none;
    font-size: 18px; color: var(--c-text-muted);
    cursor: pointer; padding: 0; line-height: 1;
    transition: color var(--duration-fast);
}
.tweaks-close:hover { color: var(--c-text); }
.tweaks-group {
    padding: 14px 18px;
    border-bottom: 1px solid var(--c-border-light);
}
.tweaks-group:last-child { border: none; }
.tweaks-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--c-text);
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    margin-bottom: 8px;
}
.tweaks-label input[type="checkbox"] {
    accent-color: var(--c-primary);
    width: 16px; height: 16px;
}
.tweaks-colors {
    display: flex;
    gap: 8px;
}
.tweaks-color {
    width: 28px; height: 28px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: transform var(--duration-fast), border-color var(--duration-fast);
}
.tweaks-color:hover { transform: scale(1.15); }
.tweaks-color.active { border-color: var(--c-text); box-shadow: 0 0 0 2px var(--c-surface), 0 0 0 4px var(--c-text); }

/* ============================================================
   PRODUCT DETAIL PAGE
   ============================================================ */
.product-page {
    padding-top: 96px;
    min-height: 80vh;
}

.breadcrumb {
    font-size: 14px;
    color: var(--c-text-muted);
    margin-bottom: 32px;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.breadcrumb a {
    color: var(--c-primary);
    font-weight: 500;
    transition: color var(--duration-fast);
}
.breadcrumb a:hover { color: var(--c-primary-dark); }
.breadcrumb-sep { color: var(--c-border); }
.breadcrumb-current { color: var(--c-text); font-weight: 600; }

.product-header {
    margin-bottom: 40px;
}
.product-title {
    font-size: clamp(28px, 5vw, 40px);
    font-weight: 800;
    color: var(--c-text);
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}
.product-cas {
    font-size: 16px;
    color: var(--c-text-secondary);
    font-weight: 500;
    padding: 8px 18px;
    background: var(--c-accent-soft);
    border-radius: var(--radius-full);
    display: inline-block;
}

.product-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 48px;
}

.product-section-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--c-text);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--c-accent-soft);
}

.spec-table {
    width: 100%;
    border-collapse: collapse;
}
.spec-table th,
.spec-table td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid var(--c-border-light);
}
.spec-table th {
    font-size: 14px;
    font-weight: 600;
    color: var(--c-text-muted);
    white-space: nowrap;
    width: 120px;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.spec-table td {
    font-size: 15px;
    color: var(--c-text);
    font-weight: 500;
}

.product-apps-text {
    font-size: 16px;
    line-height: 2;
    color: var(--c-text-secondary);
}

.product-back {
    padding-top: 24px;
    border-top: 1px solid var(--c-border-light);
}

.product-specs,
.product-applications {
    background: var(--c-surface);
    padding: 28px;
    border-radius: var(--radius);
    border: 1px solid var(--c-border-light);
}

/* ============================================================
   COMPACT MODE
   ============================================================ */
body.compact .section { padding: 64px 0; }
body.compact .section-title { margin-bottom: 32px; }
body.compact .card { padding: 16px; }
body.compact .card li { font-size: 12.5px; }
body.compact .phil-card { padding: 20px 14px 16px; }
body.compact .metric { padding: 20px 16px; }
body.compact .metric-num { font-size: 30px; }

/* ============================================================
   REDUCED MOTION
   ============================================================ */
body.no-motion *,
body.no-motion *::before,
body.no-motion *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
}

/* ============================================================
   ANIMATIONS (scroll-triggered)
   ============================================================ */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
    .reveal { opacity: 1; transform: none; transition: none; }
    * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1100px) {
    .card-grid { grid-template-columns: repeat(2, 1fr); }
    .phil-grid { grid-template-columns: repeat(3, 1fr); }
    .expertise-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
    .nav-links {
        position: fixed;
        top: 72px; left: 0; right: 0;
        background: rgba(255,255,255,0.97);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 16px 24px;
        gap: 2px;
        border-bottom: 1px solid var(--c-border);
        box-shadow: var(--shadow);
        transform: translateY(-120%);
        transition: transform 0.35s var(--ease-out);
    }
    .nav-links.open { transform: translateY(0); }
    .nav-toggle { display: flex; }

    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .about-metrics { grid-template-columns: repeat(4, 1fr); }
    .card-grid { grid-template-columns: 1fr 1fr; }
    .card-grid.cols-3 { grid-template-columns: 1fr 1fr; }
    .phil-grid { grid-template-columns: repeat(3, 1fr); }
    .expertise-grid { grid-template-columns: 1fr 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .product-detail-grid { grid-template-columns: 1fr; }
    .footer-nav { gap: 48px; }
}

@media (max-width: 600px) {
    .nav-inner { padding: 0 16px; }
    .section-container { padding: 0 20px; }
    .section { padding: 72px 0; }
    .section-title { font-size: 28px; margin-bottom: 36px; }
    .hero-content { padding: 100px 20px 60px; }
    .about-metrics { grid-template-columns: 1fr 1fr; }
    .card-grid,
    .card-grid.cols-3 { grid-template-columns: 1fr; }
    .phil-grid { grid-template-columns: 1fr 1fr; }
    .expertise-grid { grid-template-columns: 1fr; }
    .contact-cards { grid-template-columns: 1fr; }
    .product-detail-grid { grid-template-columns: 1fr; }
    .footer-nav { flex-direction: column; gap: 28px; }
    .metric-num { font-size: 32px; }
    .tweaks { bottom: 16px; right: 16px; }
}