/* ============================================
   光克拉科技官网 - 主样式表
   ============================================ */

/* --- CSS 变量 --- */
:root {
    --color-primary: #C00000;
    --color-primary-dark: #A00000;
    --color-primary-light: #D32F2F;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-text-muted: #999999;
    --color-bg: #FFFFFF;
    --color-bg-alt: #F5F5F5;
    --color-border: #E0E0E0;
    --color-card-shadow: rgba(0, 0, 0, 0.08);

    --font-cn: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-en: 'Inter', 'Roboto', sans-serif;
    --font-body: var(--font-cn);

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    --shadow-sm: 0 2px 8px var(--color-card-shadow);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);

    --transition: 0.3s ease;
    --nav-height: 72px;
}

/* --- 重置与基础 --- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

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

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

ul,
ol {
    list-style: none;
}

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

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

input,
textarea,
select {
    font-family: inherit;
    font-size: inherit;
}

/* --- 工具类 --- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
}

.section-alt {
    background: var(--color-bg-alt);
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 12px;
    color: var(--color-text);
}

.section-subtitle {
    font-size: 16px;
    color: var(--color-text-muted);
    text-align: center;
    margin-bottom: 48px;
}

.section-subtitle::after {
    content: '';
    display: block;
    width: 40px;
    height: 3px;
    background: var(--color-primary);
    margin: 16px auto 0;
    border-radius: 2px;
}

/* 滚动动画基础状态 */
.scroll-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.scroll-animate.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- 导航栏 --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 1000;
    transition: box-shadow var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-sm);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.nav-brand img {
    height: 40px;
    width: auto;
}

.nav-brand-text {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-text);
    white-space: nowrap;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text-light);
    position: relative;
    padding: 4px 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition);
}

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

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

.nav-cta {
    background: var(--color-primary);
    color: #fff !important;
    padding: 8px 20px !important;
    border-radius: var(--radius-md);
    font-weight: 500 !important;
    transition: background var(--transition) !important;
}

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

.nav-cta:hover {
    background: var(--color-primary-dark) !important;
    color: #fff !important;
}

/* 语言切换 */
.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.lang-toggle {
    display: flex;
    align-items: center;
    gap: 2px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    padding: 4px 6px;
    border-radius: var(--radius-sm);
    user-select: none;
}

.lang-toggle span {
    transition: color var(--transition);
}

.lang-separator {
    color: var(--color-border);
    margin: 0 1px;
}

.lang-zh {
    color: var(--color-primary);
}

.lang-en {
    color: var(--color-text-muted);
}

.lang-toggle.en .lang-zh {
    color: var(--color-text-muted);
}

.lang-toggle.en .lang-en {
    color: var(--color-primary);
}

/* 轮播中的 logo */
.carousel-logo {
    height: 56px;
    margin: 0 auto 20px;
    filter: brightness(0) invert(1);
    opacity: 0.85;
}

/* 移动端菜单按钮 */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    cursor: pointer;
    z-index: 1001;
}

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

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Hero 轮播 --- */
.hero {
    margin-top: var(--nav-height);
    position: relative;
    overflow: hidden;
    height: 520px;
}

.carousel {
    position: relative;
    width: 100%;
    height: 100%;
}

.carousel-track {
    display: flex;
    height: 100%;
    transition: transform 0.5s ease;
}

.carousel-slide {
    min-width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.carousel-slide::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0.12;
}

.slide-1 {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
}

.slide-2 {
    background: linear-gradient(135deg, #2d1b1b 0%, #4a1c1c 50%, #1a1a2e 100%);
}

.slide-3 {
    background: linear-gradient(135deg, #0a1628 0%, #1a365d 50%, #2d1b3d 100%);
}

.carousel-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: #fff;
    padding: 0 40px;
    max-width: 700px;
}

.carousel-content h2 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 16px;
    line-height: 1.3;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.carousel-content p {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 24px;
    line-height: 1.6;
}

.carousel-content .btn {
    display: inline-block;
    padding: 12px 32px;
    background: var(--color-primary);
    color: #fff;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 500;
    transition: all var(--transition);
}

.carousel-content .btn:hover {
    background: var(--color-primary-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(192, 0, 0, 0.4);
}

/* 轮播指示器 */
.carousel-dots {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.carousel-dots button {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    transition: all var(--transition);
}

.carousel-dots button.active {
    background: #fff;
    width: 28px;
    border-radius: 5px;
}

/* 轮播箭头 */
.carousel-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    backdrop-filter: blur(4px);
}

.carousel-arrow:hover {
    background: rgba(255, 255, 255, 0.3);
}

.carousel-arrow.prev {
    left: 20px;
}

.carousel-arrow.next {
    right: 20px;
}

/* --- 产品展示 --- */
.products {
    padding: 80px 0;
}

.product-tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.product-tab {
    padding: 10px 24px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-xl);
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text-light);
    background: var(--color-bg);
    transition: all var(--transition);
    cursor: pointer;
}

.product-tab:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.product-tab.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #fff;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.product-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 28px 20px;
    text-align: center;
    transition: all var(--transition);
    cursor: pointer;
}

.product-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.product-card-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(192, 0, 0, 0.08), rgba(192, 0, 0, 0.03));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.product-card-icon svg {
    width: 28px;
    height: 28px;
    color: var(--color-primary);
}

.product-card h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-text);
}

.product-card p {
    font-size: 13px;
    color: var(--color-text-muted);
    line-height: 1.5;
}

.product-card .card-tag {
    display: inline-block;
    margin-top: 12px;
    padding: 4px 12px;
    background: rgba(192, 0, 0, 0.06);
    color: var(--color-primary);
    border-radius: var(--radius-xl);
    font-size: 12px;
    font-weight: 500;
}

/* --- 关于我们 --- */
.about {
    background: var(--color-bg-alt);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.about-text h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--color-text);
}

.about-text p {
    font-size: 15px;
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: 16px;
}

.about-tags {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 24px;
}

.about-tag {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--color-text-light);
}

.about-tag svg {
    width: 16px;
    height: 16px;
    color: var(--color-primary);
    flex-shrink: 0;
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.stat-card {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    padding: 24px;
    text-align: center;
    border: 1px solid var(--color-border);
    transition: all var(--transition);
}

.stat-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-primary);
    font-family: var(--font-en);
    line-height: 1.2;
}

.stat-label {
    font-size: 13px;
    color: var(--color-text-muted);
    margin-top: 6px;
}

/* --- 合作伙伴 --- */
.partners {
    padding: 80px 0;
}

.partner-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.partner-item {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    height: 110px;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.partner-item:hover {
    transform: translateY(-4px);
    border-color: var(--color-primary);
    box-shadow: 0 8px 24px rgba(192, 0, 0, 0.15);
}

.partner-item img {
    max-height: 100px;
    max-width: 100%;
    object-fit: contain;
}

/* --- 联系我们 --- */
.contact {
    background: var(--color-bg-alt);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
}

.contact-form {
    background: var(--color-bg);
    border-radius: var(--radius-xl);
    padding: 36px;
    box-shadow: var(--shadow-sm);
}

.contact-form h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--color-text);
    background: var(--color-bg);
    transition: border-color var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-primary);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.btn-submit {
    width: 100%;
    padding: 12px;
    background: var(--color-primary);
    color: #fff;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 500;
    transition: all var(--transition);
    border: none;
    cursor: pointer;
}

.btn-submit:hover {
    background: var(--color-primary-dark);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-card {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    padding: 24px;
    border: 1px solid var(--color-border);
}

.contact-card h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--color-text);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 14px;
    font-size: 14px;
    color: var(--color-text-light);
}

.contact-item:last-child {
    margin-bottom: 0;
}

.contact-item svg {
    width: 18px;
    height: 18px;
    color: var(--color-primary);
    flex-shrink: 0;
    margin-top: 2px;
}

.contact-qr {
    display: flex;
    align-items: center;
    gap: 16px;
}

.contact-qr img {
    width: 100px;
    height: 100px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.contact-qr-text {
    font-size: 13px;
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* --- 页脚 --- */
.footer {
    background: #1a1a2e;
    color: rgba(255, 255, 255, 0.7);
    padding: 48px 0 0;
}

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

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

.footer-brand img {
    height: 32px;
    filter: brightness(0) invert(1);
    opacity: 0.8;
}

.footer-brand span {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
}

.footer-desc {
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 20px;
}

.footer h4 {
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 16px;
}

.footer-links a {
    display: block;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    padding: 5px 0;
    transition: color var(--transition);
}

.footer-links a:hover {
    color: #fff;
}

.footer-contact-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    margin-bottom: 10px;
}

.footer-contact-item svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    opacity: 0.7;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
}

/* --- 响应式 --- */
@media (max-width: 1024px) {
    .product-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .partner-grid {
        grid-template-columns: repeat(3, 1fr);
    }

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

@media (max-width: 768px) {
    :root {
        --nav-height: 60px;
    }

    .section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 24px;
    }

    .section-subtitle {
        font-size: 14px;
        margin-bottom: 32px;
    }

    /* 移动端导航 */
    .nav-toggle {
        display: flex;
    }

    .nav-right .nav-cta {
        display: none;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 75%;
        max-width: 300px;
        height: 100vh;
        background: var(--color-bg);
        flex-direction: column;
        padding: 80px 32px 32px;
        gap: 0;
        box-shadow: var(--shadow-lg);
        transition: right var(--transition);
        z-index: 999;
    }

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

    .nav-links a {
        display: block;
        padding: 14px 0;
        font-size: 16px;
        border-bottom: 1px solid var(--color-border);
    }

    .nav-cta {
        margin-top: 16px;
        text-align: center;
        border-bottom: none !important;
    }

    /* 移动端 Hero */
    .hero {
        height: 360px;
    }

    .carousel-content h2 {
        font-size: 24px;
    }

    .carousel-content p {
        font-size: 14px;
    }

    .carousel-arrow {
        display: none;
    }

    /* 移动端产品 */
    .product-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .product-card {
        padding: 20px 16px;
    }

    /* 移动端关于 */
    .about-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    /* 移动端合作伙伴 */
    .partner-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 12px;
    }

    /* 移动端联系 */
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

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

    /* 移动端页脚 */
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero {
        height: 300px;
    }

    .carousel-content h2 {
        font-size: 20px;
    }

    .carousel-content p {
        font-size: 13px;
        margin-bottom: 16px;
    }

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

    .product-tabs {
        gap: 6px;
    }

    .product-tab {
        padding: 8px 16px;
        font-size: 13px;
    }

    .partner-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* --- 减少动画偏好 --- */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}