/* ========================================
   迈驰密封技术 - 全局样式
   设计风格：简约大气 / 黑色背景 / 特斯拉风格
   ======================================== */

/* ===== Reset & Base ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #2b2d30;
    --bg-secondary: #222427;
    --bg-tertiary: #35373b;
    --bg-card: #383a3e;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-tertiary: #808080;
    --accent: #e82127;
    --accent-hover: #ff2d34;
    --border: #3f4145;
    --border-light: #4a4d52;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    --max-width: 1400px;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-main);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition);
}

img {
    max-width: 100%;
    display: block;
}

ul {
    list-style: none;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
    font-size: clamp(1.3rem, 2.5vw, 1.75rem);
}

p {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* ===== Layout Helpers ===== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
    position: relative;
}

.section-sm {
    padding: 60px 0;
}

.text-center {
    text-align: center;
}

.text-accent {
    color: var(--accent);
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 16px 0;
    transition: all var(--transition);
    background: rgba(43, 45, 48, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    background: rgba(43, 45, 48, 0.95);
    border-bottom: 1px solid var(--border);
    padding: 10px 0;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--text-primary);
    white-space: nowrap;
}

.nav-logo span {
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: 36px;
    align-items: center;
}

.nav-links a {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
    position: relative;
    padding: 4px 0;
}

.nav-links a::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent);
    transition: width var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-cta {
    padding: 8px 24px !important;
    border: 1px solid var(--border-light);
    border-radius: 4px;
    color: var(--text-primary) !important;
    transition: all var(--transition) !important;
}

.nav-cta:hover {
    background: var(--accent);
    border-color: var(--accent) !important;
}

.nav-cta::after {
    display: none !important;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 24px;
}

.lang-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 38px;
    height: 34px;
    padding: 0 10px;
    border: 1px solid var(--border-light);
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
    background: transparent;
    letter-spacing: 0.05em;
}

.lang-toggle:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
    z-index: 1001;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition);
    border-radius: 2px;
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 36px;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition);
    border: none;
    letter-spacing: 0.03em;
    white-space: nowrap;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(232, 33, 39, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-light);
}

.btn-outline:hover {
    border-color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.btn-lg {
    padding: 14px 48px;
    font-size: 0.95rem;
}

.btn-group {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
    background: radial-gradient(ellipse at center bottom, #35373b 0%, #2b2d30 70%);
}

.hero::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(232, 33, 39, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 80% 30%, rgba(50, 100, 200, 0.05) 0%, transparent 40%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
    padding: 0 24px;
    animation: heroFadeIn 1.2s ease-out;
}

@keyframes heroFadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-tag {
    display: inline-block;
    font-size: 0.8rem;
    color: var(--accent);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 20px;
    font-weight: 600;
}

.hero h1 {
    margin-bottom: 24px;
}

.hero h1 .highlight {
    color: var(--accent);
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    text-align: center;
}

.hero-scroll span {
    display: block;
    font-size: 0.75rem;
    color: var(--text-tertiary);
    letter-spacing: 0.1em;
    margin-bottom: 8px;
}

.hero-scroll .scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--text-tertiary), transparent);
    margin: 0 auto;
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(1); }
    50% { opacity: 1; transform: scaleY(1.2); }
}

/* ===== Section Title ===== */
.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title .label {
    display: inline-block;
    font-size: 0.8rem;
    color: var(--accent);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 16px;
    font-weight: 600;
}

.section-title h2 {
    margin-bottom: 16px;
}

.section-title p {
    max-width: 600px;
    margin: 0 auto;
    font-size: 1.05rem;
}

/* ===== Feature Cards ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 40px 32px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-slow);
}

.feature-card:hover {
    border-color: var(--border-light);
    transform: translateY(-4px);
    background: var(--bg-tertiary);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(232, 33, 39, 0.1);
    border-radius: 12px;
    margin-bottom: 24px;
}

.feature-icon svg {
    width: 28px;
    height: 28px;
    stroke: var(--accent);
    fill: none;
    stroke-width: 1.5;
}

.feature-card h3 {
    margin-bottom: 12px;
    font-size: 1.25rem;
}

.feature-card p {
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ===== Stats Section ===== */
.stats {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    text-align: center;
}

.stat-item .stat-number {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: 8px;
}

.stat-item .stat-number .unit {
    font-size: 0.5em;
    color: var(--accent);
    margin-left: 4px;
}

.stat-item .stat-label {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    letter-spacing: 0.05em;
}

/* ===== Product Showcase ===== */
.product-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.product-showcase.reverse {
    direction: rtl;
}

.product-showcase.reverse > * {
    direction: ltr;
}

.product-showcase-content .label {
    display: inline-block;
    font-size: 0.8rem;
    color: var(--accent);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 16px;
    font-weight: 600;
}

.product-showcase-content h2 {
    margin-bottom: 20px;
}

.product-showcase-content p {
    margin-bottom: 24px;
    font-size: 1rem;
    line-height: 1.8;
}

.product-features-list {
    margin-bottom: 32px;
}

.product-features-list li {
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 12px;
}

.product-features-list li::before {
    content: "";
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
    flex-shrink: 0;
}

.product-showcase-visual {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.product-showcase-visual::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at center, rgba(232, 33, 39, 0.1) 0%, transparent 60%);
}

.product-showcase-visual svg {
    width: 60%;
    height: auto;
    position: relative;
    z-index: 1;
}

/* ===== CTA Section ===== */
.cta-section {
    text-align: center;
    background:
        linear-gradient(135deg, rgba(232, 33, 39, 0.1) 0%, transparent 50%),
        var(--bg-secondary);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.cta-section h2 {
    margin-bottom: 20px;
}

.cta-section p {
    max-width: 500px;
    margin: 0 auto 32px;
    font-size: 1.05rem;
}

/* ===== Page Hero (for sub-pages) ===== */
.page-hero {
    min-height: 38vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
    background: radial-gradient(ellipse at center, #35373b 0%, #2b2d30 70%);
    padding-top: 80px;
}

.page-hero::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 70%, rgba(232, 33, 39, 0.06) 0%, transparent 50%);
}

.page-hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: 0 24px;
    animation: heroFadeIn 0.8s ease-out;
}

.page-hero .label {
    display: inline-block;
    font-size: 0.8rem;
    color: var(--accent);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 16px;
    font-weight: 600;
}

.page-hero h1 {
    margin-bottom: 16px;
}

.page-hero p {
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ===== About Page Styles ===== */
.about-story {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-story-content h2 {
    margin-bottom: 20px;
}

.about-story-content p {
    margin-bottom: 16px;
    line-height: 1.8;
}

.about-story-visual {
    height: 450px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.about-story-visual::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at center, rgba(232, 33, 39, 0.08) 0%, transparent 60%);
}

/* ===== Timeline ===== */
.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: "";
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--border-light);
}

.timeline-item {
    padding-left: 60px;
    padding-bottom: 40px;
    position: relative;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-item::before {
    content: "";
    position: absolute;
    left: 14px;
    top: 4px;
    width: 13px;
    height: 13px;
    background: var(--bg-primary);
    border: 2px solid var(--accent);
    border-radius: 50%;
    z-index: 1;
}

.timeline-year {
    font-size: 0.85rem;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 6px;
    letter-spacing: 0.05em;
}

.timeline-item h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.timeline-item p {
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ===== Values Grid ===== */
.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.value-card {
    text-align: center;
    padding: 40px 28px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: all var(--transition);
}

.value-card:hover {
    border-color: var(--border-light);
    transform: translateY(-4px);
}

.value-card .value-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(232, 33, 39, 0.1);
    border-radius: 50%;
}

.value-card .value-icon svg {
    width: 30px;
    height: 30px;
    stroke: var(--accent);
    fill: none;
    stroke-width: 1.5;
}

.value-card h3 {
    font-size: 1.15rem;
    margin-bottom: 10px;
}

.value-card p {
    font-size: 0.88rem;
    line-height: 1.7;
}

/* ===== Products Page Styles ===== */
.section-products {
    padding: 30px 0 80px;
}

.section-contact {
    padding-top: 30px;
}

.product-category {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    transition: all var(--transition);
    cursor: pointer;
}

.product-category:hover {
    border-color: var(--border-light);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.product-category-visual {
    height: 240px;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--border);
}

.product-category-visual::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at center, rgba(232, 33, 39, 0.1) 0%, transparent 60%);
}

.product-category-visual svg {
    width: 120px;
    height: 120px;
    position: relative;
    z-index: 1;
}

.product-category-body {
    padding: 32px;
}

.product-category-body .tag {
    display: inline-block;
    font-size: 0.72rem;
    color: var(--accent);
    background: rgba(232, 33, 39, 0.1);
    padding: 4px 12px;
    border-radius: 20px;
    margin-bottom: 12px;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.product-category-body h3 {
    margin-bottom: 12px;
    font-size: 1.3rem;
}

.product-category-body p {
    font-size: 0.9rem;
    margin-bottom: 20px;
    line-height: 1.7;
}

.product-specs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.product-specs span {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    border: 1px solid var(--border);
    padding: 4px 10px;
    border-radius: 4px;
}

/* ===== Product Carousel ===== */
.product-carousel-wrapper {
    position: relative;
    margin: 0 -24px;
    padding: 0 24px;
}

.product-carousel {
    display: flex;
    gap: 24px;
    overflow-x: auto;
    scroll-behavior: smooth;
    scroll-snap-type: x mandatory;
    padding: 10px 0 24px;
    scrollbar-width: none;
    -ms-scrollbar-style: none;
}

.product-carousel::-webkit-scrollbar {
    display: none;
}

.product-carousel .product-category {
    flex: 0 0 380px;
    scroll-snap-align: start;
}

.carousel-btn {
    position: absolute;
    top: 45%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(53, 55, 59, 0.9);
    border: 1px solid var(--border-light);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    transition: all var(--transition);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.carousel-btn:hover {
    background: var(--accent);
    border-color: var(--accent);
    box-shadow: 0 4px 20px rgba(232, 33, 39, 0.4);
}

.carousel-btn:active {
    transform: translateY(-50%) scale(0.95);
}

.carousel-btn svg {
    width: 22px;
    height: 22px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

.carousel-btn-prev {
    left: 6px;
}

.carousel-btn-next {
    right: 6px;
}

.carousel-btn.disabled {
    opacity: 0.3;
    cursor: not-allowed;
    pointer-events: none;
}

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 12px;
}

.carousel-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border-light);
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    padding: 0;
}

.carousel-dot.active {
    background: var(--accent);
    width: 24px;
    border-radius: 4px;
}

/* ===== Smart Seal Section ===== */
.smart-seal-section {
    background:
        linear-gradient(135deg, rgba(232, 33, 39, 0.12) 0%, transparent 50%),
        linear-gradient(225deg, rgba(50, 100, 200, 0.08) 0%, transparent 50%),
        var(--bg-secondary);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    overflow: hidden;
}

.smart-seal-hero {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 48px;
}

.smart-seal-hero .smart-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.78rem;
    color: var(--accent);
    background: rgba(232, 33, 39, 0.1);
    border: 1px solid rgba(232, 33, 39, 0.2);
    padding: 6px 16px;
    border-radius: 20px;
    margin-bottom: 20px;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.smart-seal-hero .smart-badge::before {
    content: "";
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.3); }
}

.smart-seal-hero h2 {
    margin-bottom: 16px;
}

.smart-seal-hero h2 .gradient-text {
    background: linear-gradient(135deg, var(--accent), #ff6b6b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.smart-seal-hero p {
    font-size: 1.05rem;
    line-height: 1.8;
}

.smart-seal-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    margin-bottom: 48px;
}

.smart-seal-feature {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px 28px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.smart-seal-feature::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), transparent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-slow);
}

.smart-seal-feature:hover {
    border-color: rgba(232, 33, 39, 0.3);
    transform: translateY(-4px);
    background: var(--bg-tertiary);
}

.smart-seal-feature:hover::after {
    transform: scaleX(1);
}

.smart-seal-feature .feature-number {
    font-size: 0.75rem;
    color: var(--accent);
    font-weight: 700;
    letter-spacing: 0.1em;
    margin-bottom: 12px;
}

.smart-seal-feature h3 {
    font-size: 1.15rem;
    margin-bottom: 10px;
}

.smart-seal-feature p {
    font-size: 0.88rem;
    line-height: 1.7;
}

.smart-seal-lifecycle {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 40px;
    position: relative;
    overflow: hidden;
}

.smart-seal-lifecycle::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 80% 20%, rgba(232, 33, 39, 0.06) 0%, transparent 50%);
    pointer-events: none;
}

.lifecycle-title {
    text-align: center;
    margin-bottom: 32px;
    position: relative;
}

.lifecycle-title h3 {
    font-size: 1.3rem;
    margin-bottom: 8px;
}

.lifecycle-title p {
    font-size: 0.9rem;
}

.lifecycle-stages {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    position: relative;
    flex-wrap: wrap;
    gap: 16px;
}

.lifecycle-stages::before {
    content: "";
    position: absolute;
    top: 24px;
    left: 5%;
    right: 5%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-light), transparent);
}

.lifecycle-stage {
    flex: 1;
    min-width: 120px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.lifecycle-stage .stage-dot {
    width: 48px;
    height: 48px;
    margin: 0 auto 12px;
    border-radius: 50%;
    background: var(--bg-primary);
    border: 2px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

.lifecycle-stage:hover .stage-dot {
    border-color: var(--accent);
    box-shadow: 0 0 20px rgba(232, 33, 39, 0.3);
}

.lifecycle-stage .stage-dot svg {
    width: 22px;
    height: 22px;
    stroke: var(--text-secondary);
    fill: none;
    stroke-width: 1.5;
    transition: stroke var(--transition);
}

.lifecycle-stage:hover .stage-dot svg {
    stroke: var(--accent);
}

.lifecycle-stage h4 {
    font-size: 0.9rem;
    margin-bottom: 4px;
}

.lifecycle-stage p {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

/* ===== Service Process ===== */
.process-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    counter-reset: process;
}

.process-step {
    text-align: center;
    padding: 40px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    position: relative;
    transition: all var(--transition);
}

.process-step:hover {
    border-color: var(--accent);
    background: var(--bg-tertiary);
}

.process-step .step-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--border-light);
    line-height: 1;
    margin-bottom: 16px;
    transition: color var(--transition);
}

.process-step:hover .step-number {
    color: var(--accent);
}

.process-step h3 {
    font-size: 1.1rem;
    margin-bottom: 10px;
}

.process-step p {
    font-size: 0.85rem;
    line-height: 1.6;
}

/* ===== Contact Page Styles ===== */
.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 48px;
}

.contact-info-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 40px;
}

.contact-info-card h3 {
    margin-bottom: 28px;
    font-size: 1.3rem;
}

.contact-info-list {
    margin-bottom: 32px;
}

.contact-info-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
}

.contact-info-item:last-child {
    border-bottom: none;
}

.contact-info-item .icon {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(232, 33, 39, 0.1);
    border-radius: 8px;
}

.contact-info-item .icon svg {
    width: 20px;
    height: 20px;
    stroke: var(--accent);
    fill: none;
    stroke-width: 1.5;
}

.contact-info-item .info-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.contact-info-item .info-value {
    font-size: 0.95rem;
    color: var(--text-primary);
}

/* ===== Contact Form ===== */
.contact-form-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 40px;
}

.contact-form-card h3 {
    margin-bottom: 28px;
    font-size: 1.3rem;
}

.form-group {
    margin-bottom: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    letter-spacing: 0.03em;
}

.form-group label .required {
    color: var(--accent);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: var(--font-main);
    transition: border-color var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23a0a0a0' stroke-width='2'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 18px;
    padding-right: 40px;
}

.form-message {
    padding: 12px 16px;
    border-radius: 6px;
    font-size: 0.85rem;
    margin-bottom: 16px;
    display: none;
}

.form-message.success {
    display: block;
    background: rgba(40, 180, 80, 0.1);
    border: 1px solid rgba(40, 180, 80, 0.3);
    color: #28b450;
}

.form-message.error {
    display: block;
    background: rgba(232, 33, 39, 0.1);
    border: 1px solid rgba(232, 33, 39, 0.3);
    color: var(--accent);
}

/* ===== Map Section ===== */
.map-section {
    height: 400px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.map-placeholder {
    text-align: center;
    color: var(--text-tertiary);
}

.map-placeholder svg {
    width: 60px;
    height: 60px;
    margin: 0 auto 16px;
    stroke: var(--text-tertiary);
    fill: none;
    stroke-width: 1;
}

.map-placeholder p {
    color: var(--text-tertiary);
    font-size: 0.9rem;
}

/* ===== Footer ===== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand .footer-logo {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.footer-brand .footer-logo span {
    color: var(--accent);
}

.footer-brand p {
    font-size: 0.85rem;
    line-height: 1.7;
    max-width: 300px;
}

.footer-col h4 {
    font-size: 0.85rem;
    color: var(--text-primary);
    margin-bottom: 16px;
    font-weight: 600;
    letter-spacing: 0.03em;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.footer-col ul li a:hover {
    color: var(--text-primary);
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

.footer-bottom .footer-links {
    display: flex;
    gap: 20px;
}

.footer-bottom .footer-links a {
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

.footer-bottom .footer-links a:hover {
    color: var(--text-secondary);
}

/* ===== Scroll Animations ===== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ===== Responsive ===== */
@media (max-width: 968px) {
    .product-showcase,
    .about-story,
    .contact-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .product-showcase.reverse {
        direction: ltr;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }

    .footer-brand {
        grid-column: 1 / -1;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 60px 0;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background: rgba(43, 45, 48, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 32px;
        transition: right var(--transition-slow);
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links a {
        font-size: 1.25rem;
    }

    .nav-toggle {
        display: flex;
    }

    .lang-toggle {
        margin-right: 8px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
        max-width: 280px;
        margin: 0 auto;
    }

    .hero-actions .btn {
        width: 100%;
    }

    .product-carousel .product-category {
        flex: 0 0 300px;
    }

    .lifecycle-stages::before {
        display: none;
    }

    .lifecycle-stage {
        flex: 0 0 45%;
    }

    .smart-seal-lifecycle {
        padding: 28px 20px;
    }

    .carousel-btn {
        width: 40px;
        height: 40px;
    }

    .carousel-btn svg {
        width: 18px;
        height: 18px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .section {
        padding: 48px 0;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .contact-info-card,
    .contact-form-card {
        padding: 28px 20px;
    }

    .product-carousel .product-category {
        flex: 0 0 85vw;
    }

    .smart-seal-lifecycle {
        padding: 24px 16px;
    }

    .lifecycle-stage {
        flex: 0 0 45%;
        margin-bottom: 8px;
    }
}