/* ========================================
   斯拉姆(陕西)机器人科技有限公司 - 官网样式
   设计：深色科技风 / 青色主题 / 全响应式
   ======================================== */

/* ===== CSS 变量 ===== */
:root {
    --color-bg: #0a0e17;
    --color-bg-2: #0f1420;
    --color-surface: #151b2c;
    --color-surface-2: #1a2138;
    --color-border: rgba(0, 212, 255, 0.12);
    --color-border-hover: rgba(0, 212, 255, 0.35);
    --color-primary: #00d4ff;
    --color-primary-dim: #0099cc;
    --color-accent: #00ffaa;
    --color-text: #e0e6f0;
    --color-text-dim: #8a96b0;
    --color-text-muted: #5a6478;
    --color-white: #ffffff;

    --gradient-primary: linear-gradient(135deg, #00d4ff 0%, #0099cc 100%);
    --gradient-accent: linear-gradient(135deg, #00ffaa 0%, #00d4ff 100%);
    --gradient-text: linear-gradient(135deg, #00d4ff 0%, #00ffaa 100%);
    --gradient-card: linear-gradient(145deg, rgba(21, 27, 44, 0.8) 0%, rgba(15, 20, 32, 0.9) 100%);

    --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-tech: 'Orbitron', 'Noto Sans SC', sans-serif;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    --shadow-glow: 0 0 40px rgba(0, 212, 255, 0.15);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 12px 48px rgba(0, 212, 255, 0.2);

    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);

    --nav-height: 72px;
    --container-max: 1200px;
}

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

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

body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

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

input,
textarea {
    font-family: inherit;
}

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

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

/* ===== 通用按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 36px;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    transition: all var(--transition);
    cursor: pointer;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--color-bg);
    font-weight: 700;
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 212, 255, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 1.5px solid var(--color-border-hover);
}

.btn-outline:hover {
    background: rgba(0, 212, 255, 0.08);
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
}

/* ===== 渐变文字 ===== */
.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

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

.section-label {
    display: inline-block;
    font-family: var(--font-tech);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 4px;
    color: var(--color-primary);
    margin-bottom: 12px;
    opacity: 0.8;
}

.section-title {
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.section-line {
    width: 60px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 2px;
    margin: 0 auto 20px;
}

.section-desc {
    color: var(--color-text-dim);
    font-size: 1.05rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    z-index: 1000;
    transition: all var(--transition);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(10, 14, 23, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-icon {
    flex-shrink: 0;
    filter: drop-shadow(0 0 10px rgba(0, 212, 255, 0.4));
    transition: filter 0.3s;
}

.nav-logo:hover .logo-icon {
    filter: drop-shadow(0 0 16px rgba(0, 212, 255, 0.7));
}

.logo-text-group {
    display: flex;
    flex-direction: column;
    line-height: 1.15;
}

.logo-cn {
    font-family: var(--font-body);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-white);
    letter-spacing: 1px;
    white-space: nowrap;
}

.logo-en {
    font-family: var(--font-tech);
    font-size: 0.62rem;
    font-weight: 500;
    color: var(--color-primary);
    letter-spacing: 3px;
    white-space: nowrap;
    opacity: 0.8;
}

.nav-menu {
    display: flex;
    gap: 36px;
}

.nav-link {
    position: relative;
    font-size: 0.95rem;
    color: var(--color-text-dim);
    transition: color var(--transition);
    padding: 6px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 1px;
    transition: width var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-white);
}

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

/* 汉堡菜单 */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 6px;
    z-index: 1001;
}

.hamburger span {
    width: 26px;
    height: 2.5px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5.5px, 5.5px);
}

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

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5.5px, -5.5px);
}

/* ===== Hero 首屏 ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: radial-gradient(ellipse at 50% 40%, #0f1929 0%, #0a0e17 70%);
}

#particleCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    background-image:
        linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    padding: 0 24px;
    max-width: 900px;
}

.hero-tagline {
    font-family: var(--font-tech);
    font-size: 0.8rem;
    letter-spacing: 6px;
    color: var(--color-primary);
    margin-bottom: 20px;
    opacity: 0.85;
    text-transform: uppercase;
}

.hero-title {
    font-size: clamp(1.6rem, 5vw, 3.6rem);
    font-weight: 900;
    line-height: 1.3;
    color: var(--color-white);
    margin-bottom: 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.hero-brand {
    display: block;
    font-size: clamp(2.2rem, 7vw, 5rem);
    font-weight: 900;
    background: linear-gradient(135deg, #ffffff 0%, #00d4ff 50%, #00ffaa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 4px;
    filter: drop-shadow(0 0 30px rgba(0, 212, 255, 0.3));
    animation: brandPulse 3s ease-in-out infinite;
}

@keyframes brandPulse {
    0%, 100% { filter: drop-shadow(0 0 20px rgba(0, 212, 255, 0.3)); }
    50% { filter: drop-shadow(0 0 40px rgba(0, 212, 255, 0.6)); }
}

.hero-slogan {
    display: block;
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    font-weight: 500;
    color: var(--color-text-dim);
    letter-spacing: 3px;
    font-family: var(--font-body);
}

.hero-desc {
    font-size: clamp(0.95rem, 2vw, 1.15rem);
    color: var(--color-text-dim);
    line-height: 1.9;
    margin-bottom: 40px;
}

.hero-br {
    display: inline;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 80px;
}

.hero-scroll {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: var(--color-text-muted);
    font-size: 0.8rem;
    letter-spacing: 2px;
}

.scroll-line {
    width: 2px;
    height: 50px;
    background: linear-gradient(to bottom, var(--color-primary), transparent);
    position: relative;
    overflow: hidden;
}

.scroll-line::after {
    content: '';
    position: absolute;
    top: -50%;
    left: 0;
    width: 100%;
    height: 50%;
    background: var(--color-accent);
    animation: scrollDown 2s infinite ease-in-out;
}

@keyframes scrollDown {
    0% { top: -50%; }
    100% { top: 100%; }
}

/* ===== 关于我们 ===== */
.about {
    background: var(--color-bg-2);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h3 {
    font-size: 1.6rem;
    color: var(--color-white);
    margin-bottom: 24px;
    font-weight: 700;
}

.about-text p {
    color: var(--color-text-dim);
    margin-bottom: 20px;
    font-size: 1.02rem;
    line-height: 1.9;
}

.about-values {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 36px;
}

.value-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-primary);
}

.value-item span {
    color: var(--color-text);
    font-size: 1rem;
    font-weight: 500;
}

/* 统计数据 */
.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.stat-card {
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition);
}

.stat-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-hover);
}

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

.stat-number {
    font-family: var(--font-tech);
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}

.stat-plus,
.stat-unit {
    font-family: var(--font-tech);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-accent);
}

.stat-card p {
    margin-top: 12px;
    color: var(--color-text-dim);
    font-size: 0.95rem;
}

/* ===== 产品与服务 ===== */
.products {
    background: var(--color-bg);
    position: relative;
}

.products::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.04) 0%, transparent 70%);
    pointer-events: none;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.product-card {
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 40px 32px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.product-card::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.1) 0%, transparent 70%);
    transition: all var(--transition-slow);
    opacity: 0;
}

.product-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-hover);
}

.product-card:hover::after {
    opacity: 1;
    top: -20%;
    right: -20%;
}

.product-icon-wrap {
    width: 72px;
    height: 72px;
    border-radius: var(--radius-md);
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 28px;
    color: var(--color-primary);
    transition: all var(--transition);
}

.product-card:hover .product-icon-wrap {
    background: rgba(0, 212, 255, 0.15);
    border-color: var(--color-primary);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
}

/* 产品图片 */
.product-image {
    width: 100%;
    height: 200px;
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: 24px;
    border: 1px solid var(--color-border);
    transition: all var(--transition);
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.product-card:hover .product-image {
    border-color: var(--color-border-hover);
    box-shadow: 0 0 24px rgba(0, 212, 255, 0.15);
}

.product-card:hover .product-image img {
    transform: scale(1.05);
}

.product-card h3 {
    font-size: 1.4rem;
    color: var(--color-white);
    margin-bottom: 6px;
    font-weight: 700;
}

.product-en {
    font-family: var(--font-tech);
    font-size: 0.75rem;
    color: var(--color-primary);
    letter-spacing: 1.5px;
    margin-bottom: 18px;
    opacity: 0.7;
}

.product-desc {
    color: var(--color-text-dim);
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: 24px;
}

.product-features {
    margin-bottom: 24px;
}

.product-features li {
    position: relative;
    padding-left: 24px;
    margin-bottom: 10px;
    color: var(--color-text-dim);
    font-size: 0.92rem;
}

.product-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 8px;
    height: 8px;
    border: 1.5px solid var(--color-primary);
    border-radius: 2px;
    transform: rotate(45deg);
    transition: all var(--transition);
}

.product-card:hover .product-features li::before {
    background: var(--color-primary);
    box-shadow: 0 0 8px rgba(0, 212, 255, 0.5);
}

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

.product-tags span {
    padding: 5px 14px;
    background: rgba(0, 212, 255, 0.06);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--color-primary);
    transition: all var(--transition);
}

.product-tags span:hover {
    background: rgba(0, 212, 255, 0.15);
    border-color: var(--color-primary);
}

/* ===== 技术实力 ===== */
.tech {
    background: var(--color-bg-2);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.tech-item {
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    position: relative;
    overflow: hidden;
    transition: all var(--transition);
}

.tech-item:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-4px);
}

.tech-bar {
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-primary);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform var(--transition);
}

.tech-item:hover .tech-bar {
    transform: scaleY(1);
}

.tech-item h4 {
    font-size: 1.15rem;
    color: var(--color-white);
    margin-bottom: 12px;
    font-weight: 600;
}

.tech-item p {
    color: var(--color-text-dim);
    font-size: 0.92rem;
    line-height: 1.8;
}

/* ===== 解决方案 ===== */
.solutions {
    background: var(--color-bg);
}

.solutions-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.solution-card {
    display: flex;
    align-items: center;
    gap: 32px;
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 36px 40px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.solution-card:hover {
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-card);
    transform: translateX(8px);
}

.solution-number {
    font-family: var(--font-tech);
    font-size: 2.8rem;
    font-weight: 900;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    flex-shrink: 0;
    min-width: 60px;
}

.solution-content {
    flex: 1;
}

.solution-content h3 {
    font-size: 1.3rem;
    color: var(--color-white);
    margin-bottom: 10px;
    font-weight: 700;
}

.solution-content p {
    color: var(--color-text-dim);
    font-size: 0.96rem;
    line-height: 1.8;
}

.solution-icon {
    flex-shrink: 0;
    color: var(--color-primary);
    opacity: 0.5;
    transition: all var(--transition);
}

.solution-card:hover .solution-icon {
    opacity: 1;
    transform: scale(1.1);
}

/* ===== 联系我们 ===== */
.contact {
    background: var(--color-bg-2);
}

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

.contact-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 20px;
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 40px 24px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.contact-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 0 0 2px 2px;
    transition: width var(--transition);
}

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

.contact-card:hover::before {
    width: 60%;
}

.contact-card-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    flex-shrink: 0;
    transition: all var(--transition);
}

.contact-card:hover .contact-card-icon {
    background: rgba(0, 212, 255, 0.18);
    border-color: var(--color-primary);
    box-shadow: 0 0 24px rgba(0, 212, 255, 0.25);
}

.contact-card-info h4 {
    font-size: 1.05rem;
    color: var(--color-white);
    margin-bottom: 8px;
    font-weight: 600;
}

.contact-card-info p {
    color: var(--color-text-dim);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
    padding: 64px 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.2fr;
    gap: 40px;
    margin-bottom: 40px;
}

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

.footer-brand .footer-logo span {
    font-family: var(--font-tech);
    font-size: 1.1rem;
    color: var(--color-white);
    font-weight: 700;
}

.footer-brand p {
    color: var(--color-text-dim);
    font-size: 0.9rem;
    line-height: 1.8;
}

.footer-links h4 {
    color: var(--color-white);
    font-size: 1rem;
    margin-bottom: 18px;
    font-weight: 600;
}

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

.footer-links ul li a {
    color: var(--color-text-dim);
    font-size: 0.9rem;
    transition: color var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
}

.footer-bottom p {
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

/* ===== 滚动动画 ===== */
.reveal-up,
.reveal-left,
.reveal-right {
    opacity: 0;
    transition: opacity 0.7s ease, transform 0.7s ease;
    transition-delay: var(--delay, 0s);
}

.reveal-up {
    transform: translateY(40px);
}

.reveal-left {
    transform: translateX(-40px);
}

.reveal-right {
    transform: translateX(40px);
}

.reveal-up.visible,
.reveal-left.visible,
.reveal-right.visible {
    opacity: 1;
    transform: translate(0, 0);
}

/* ===== 响应式: 平板 ===== */
@media (max-width: 1024px) {
    .section {
        padding: 80px 0;
    }

    .section-title {
        font-size: 2rem;
    }

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

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

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

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

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

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

/* ===== 响应式: 移动端 ===== */
@media (max-width: 768px) {
    :root {
        --nav-height: 64px;
    }

    .section {
        padding: 60px 0;
    }

    .container {
        padding: 0 20px;
    }

    /* 导航栏移动端 */
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 75%;
        max-width: 320px;
        height: 100vh;
        background: rgba(10, 14, 23, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 32px;
        transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        border-left: 1px solid var(--color-border);
    }

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

    .nav-link {
        font-size: 1.1rem;
    }

    .hamburger {
        display: flex;
    }

    /* Hero 移动端 */
    .hero-title {
        letter-spacing: 1px;
    }

    .hero-brand {
        font-size: clamp(1.8rem, 10vw, 3rem);
        letter-spacing: 2px;
    }

    .hero-slogan {
        font-size: 0.85rem;
        letter-spacing: 1px;
    }

    /* Logo 移动端 */
    .logo-cn {
        font-size: 0.95rem;
    }

    .logo-en {
        font-size: 0.55rem;
        letter-spacing: 2px;
    }

    .hero-br {
        display: none;
    }

    .hero-desc {
        font-size: 0.95rem;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
        max-width: 280px;
        margin: 0 auto 60px;
    }

    .btn {
        width: 100%;
    }

    /* Section */
    .section-title {
        font-size: 1.6rem;
    }

    .section-desc {
        font-size: 0.95rem;
    }

    /* 关于我们 */
    .about-text h3 {
        font-size: 1.3rem;
    }

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

    .stat-card {
        padding: 24px 16px;
    }

    .stat-number {
        font-size: 2.2rem;
    }

    /* 产品 */
    .products-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .product-card {
        padding: 32px 24px;
    }

    /* 技术实力 */
    .tech-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .tech-item {
        padding: 24px 20px;
    }

    /* 解决方案 */
    .solution-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
        padding: 28px 24px;
    }

    .solution-card:hover {
        transform: none;
    }

    .solution-number {
        font-size: 2.2rem;
    }

    .solution-icon {
        align-self: flex-end;
    }

    /* 联系我们移动端 */
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .contact-card {
        flex-direction: row;
        align-items: center;
        text-align: left;
        padding: 24px 20px;
        gap: 16px;
    }

    .contact-card-icon {
        width: 48px;
        height: 48px;
    }

    /* 页脚 */
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
        text-align: center;
    }

    .footer-brand .footer-logo {
        justify-content: center;
    }

    .footer-links ul {
        text-align: center;
    }
}

/* ===== 响应式: 小屏手机 ===== */
@media (max-width: 480px) {
    .hero-tagline {
        font-size: 0.7rem;
        letter-spacing: 3px;
    }

    .section-label {
        font-size: 0.7rem;
        letter-spacing: 3px;
    }

    .hero-buttons {
        gap: 12px;
    }

    .btn {
        padding: 12px 28px;
        font-size: 0.9rem;
    }

    .product-card {
        padding: 28px 20px;
    }

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

/* ========================================
   数字孪生 3D 场景 — 左右对称布局
   ======================================== */
.digital-twin {
    background: linear-gradient(180deg, var(--color-bg) 0%, #0d1320 100%);
}

.twin-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
    margin-top: 32px;
    align-items: start;
}

.twin-3d-view {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1;
    min-height: 520px;
    background: radial-gradient(ellipse at center, #111a2a 0%, #080c14 100%);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid rgba(0, 212, 255, 0.15);
    box-shadow: 0 0 60px rgba(0, 212, 255, 0.06);
}

.twin-3d-view canvas {
    display: block;
    width: 100% !important;
    height: 100% !important;
    cursor: grab;
}
.twin-3d-view canvas:active {
    cursor: grabbing;
}

.twin-hint {
    position: absolute;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 6px;
    color: rgba(255, 255, 255, 0.4);
    font-size: 12px;
    pointer-events: none;
    z-index: 10;
    background: rgba(10, 14, 23, 0.85);
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.twin-hint svg {
    opacity: 0.5;
}

/* 3D 浮动标签 */
.twin3d-label {
    position: absolute;
    color: #00d4ff;
    font-family: 'Orbitron', monospace;
    font-size: 10px;
    pointer-events: none;
    text-shadow: 0 0 8px rgba(0, 212, 255, 0.6);
    white-space: nowrap;
    z-index: 5;
}

/* 数据面板 */
.twin-data-panel {
    color: #e0e0e0;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: 16px;
    padding: 28px 24px;
    box-shadow: 0 0 60px rgba(0, 212, 255, 0.06);
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.twin-data-panel h3 {
    font-size: 1rem;
    color: #00d4ff;
    font-family: 'Orbitron', monospace;
    letter-spacing: 1px;
    margin: 0;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(0, 212, 255, 0.1);
}

.twin-gauges {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.gauge-card {
    background: rgba(0, 212, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6px;
    transition: border-color 0.3s;
}

.gauge-card:hover {
    border-color: rgba(0, 212, 255, 0.3);
}

.gauge-card canvas {
    max-width: 100%;
    height: auto;
}

.twin-charts {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.chart-box {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 12px;
    padding: 10px;
    position: relative;
    transition: border-color 0.3s;
}

.chart-box:hover {
    border-color: rgba(0, 212, 255, 0.3);
}

.chart-label {
    position: absolute;
    top: 8px;
    left: 12px;
    font-size: 10px;
    color: rgba(255, 255, 255, 0.4);
    font-family: 'Noto Sans SC', sans-serif;
}

.chart-box canvas {
    width: 100%;
    height: auto;
}

/* 设备健康度 */
.twin-health {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.health-item {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6px;
    transition: border-color 0.3s;
}

.health-item:hover {
    border-color: rgba(0, 255, 170, 0.3);
}

/* 告警列表 */
.alert-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 260px;
    overflow-y: auto;
}

.alert-item {
    display: flex;
    gap: 8px;
    padding: 10px 12px;
    background: rgba(255, 255, 255, 0.02);
    border-left: 3px solid #555;
    border-radius: 0 8px 8px 0;
    font-size: 12px;
    transition: background 0.3s;
}

.alert-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

.alert-danger { border-left-color: #ff4444; }
.alert-danger .alert-icon { color: #ff4444; }
.alert-warning { border-left-color: #ffaa00; }
.alert-warning .alert-icon { color: #ffaa00; }
.alert-info { border-left-color: #00d4ff; }
.alert-info .alert-icon { color: #00d4ff; }

.alert-icon {
    font-weight: bold;
    font-family: 'Orbitron', monospace;
    font-size: 14px;
    line-height: 1.4;
    flex-shrink: 0;
}

.alert-item strong {
    display: block;
    color: #fff;
    font-size: 12px;
}

.alert-item p {
    margin: 2px 0 0;
    color: rgba(255, 255, 255, 0.5);
    font-size: 11px;
}

.alert-time {
    float: right;
    color: rgba(255, 255, 255, 0.3);
    font-size: 10px;
}

/* ========================================
   互动产品展示
   ======================================== */
.interactive {
    background: var(--bg-primary);
}

.interactive-grid {
    display: grid;
    grid-template-columns: 1fr 420px;
    gap: 28px;
    margin-top: 32px;
}

/* 3D 查看器 */
.interactive-viewer {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(0, 212, 255, 0.12);
    border-radius: 16px;
    overflow: hidden;
}

.viewer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    flex-wrap: wrap;
    gap: 10px;
}

.viewer-header h3 {
    font-size: 1rem;
    color: #00d4ff;
    font-family: 'Orbitron', monospace;
    margin: 0 0 4px;
}

.viewer-product-title {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.5);
    transition: color 0.3s;
}

.viewer-controls {
    display: flex;
    gap: 6px;
}

.viewer-btn {
    padding: 6px 16px;
    background: transparent;
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 20px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 12px;
    font-family: 'Orbitron', monospace;
    cursor: pointer;
    transition: all 0.3s;
}

.viewer-btn:hover,
.viewer-btn.active {
    background: rgba(0, 212, 255, 0.15);
    border-color: #00d4ff;
    color: #00d4ff;
}

.viewer-3d {
    position: relative;
    width: 100%;
    aspect-ratio: 16/10;
    min-height: 350px;
    background: radial-gradient(ellipse at center, #111a2a 0%, #080c14 100%);
    cursor: grab;
}

.viewer-3d:active {
    cursor: grabbing;
}

.viewer-3d canvas {
    display: block;
}

.viewer-hint {
    position: absolute;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255, 255, 255, 0.3);
    font-size: 11px;
    background: rgba(10, 14, 23, 0.8);
    padding: 4px 14px;
    border-radius: 12px;
    pointer-events: none;
}

.viewer-specs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1px;
    background: rgba(255, 255, 255, 0.05);
}

.spec-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    background: #0d1320;
    font-size: 12px;
}

.spec-key {
    color: rgba(255, 255, 255, 0.5);
    text-transform: uppercase;
    font-family: 'Orbitron', monospace;
    font-size: 10px;
    letter-spacing: 1px;
}

.spec-val {
    color: #00ffaa;
    font-weight: 600;
    font-family: 'Orbitron', monospace;
    font-size: 13px;
}

/* 方案配置器 */
.interactive-config {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(0, 212, 255, 0.12);
    border-radius: 16px;
    padding: 24px;
}

.interactive-config h3 {
    font-size: 1rem;
    color: #00d4ff;
    font-family: 'Orbitron', monospace;
    margin-bottom: 8px;
}

.config-desc {
    color: rgba(255, 255, 255, 0.5);
    font-size: 13px;
    margin-bottom: 20px;
}

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

.config-group > label {
    display: block;
    color: rgba(255, 255, 255, 0.7);
    font-size: 12px;
    font-weight: 500;
    margin-bottom: 8px;
}

.config-options {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.config-opt {
    position: relative;
    cursor: pointer;
}

.config-opt input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.config-opt .opt-label {
    display: block;
    padding: 6px 14px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.6);
    transition: all 0.3s;
}

.config-opt input:checked + .opt-label {
    background: rgba(0, 212, 255, 0.15);
    border-color: #00d4ff;
    color: #00d4ff;
}

.config-opt:hover .opt-label {
    border-color: rgba(0, 212, 255, 0.4);
}

/* 配置结果 */
.config-result {
    background: rgba(0, 212, 255, 0.05);
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: 12px;
    padding: 14px 18px;
    margin-top: 20px;
}

.config-summary-item {
    color: rgba(255, 255, 255, 0.6);
    font-size: 12px;
    line-height: 2;
}

.config-total {
    text-align: center;
    margin-top: 14px;
    padding: 12px;
    background: rgba(0, 255, 170, 0.06);
    border: 1px solid rgba(0, 255, 170, 0.2);
    border-radius: 10px;
    color: #fff;
    font-size: 14px;
}

.config-price {
    color: #00ffaa;
    font-size: 1.4rem;
    font-weight: 700;
    font-family: 'Orbitron', monospace;
}

/* 产品卡片展示 */
.product-showcase-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.product-showcase-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(0, 212, 255, 0.1);
    border-radius: 16px;
    padding: 28px 22px;
    text-align: center;
    transition: transform 0.4s ease, border-color 0.3s, box-shadow 0.3s;
    cursor: pointer;
}

.product-showcase-card:hover {
    border-color: rgba(0, 212, 255, 0.4);
    box-shadow: 0 8px 40px rgba(0, 212, 255, 0.1);
}

.psc-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.08);
    border-radius: 50%;
    color: #00d4ff;
}

.product-showcase-card h4 {
    font-family: 'Orbitron', monospace;
    font-size: 1.1rem;
    color: #fff;
    margin-bottom: 10px;
}

.product-showcase-card p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
    line-height: 1.6;
    margin-bottom: 14px;
}

.psc-tag {
    display: inline-block;
    padding: 3px 10px;
    margin: 0 3px 4px;
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 12px;
    font-size: 10px;
    color: #00d4ff;
    font-family: 'Orbitron', monospace;
}

/* ========================================
   数字孪生 & 互动展示 — 响应式
   ======================================== */
@media (max-width: 1024px) {
    .twin-layout {
        grid-template-columns: 1fr;
    }

    .twin-3d-view {
        aspect-ratio: 16/7;
        min-height: 360px;
    }

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

    .viewer-3d {
        min-height: 300px;
    }

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

@media (max-width: 768px) {
    .twin-3d-view {
        aspect-ratio: 4/3;
        min-height: 280px;
    }

    .twin-gauges {
        grid-template-columns: 1fr 1fr;
    }

    .twin-charts {
        grid-template-columns: 1fr;
    }

    .twin-health {
        grid-template-columns: repeat(4, 1fr);
    }

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

    .viewer-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .viewer-specs {
        grid-template-columns: 1fr;
    }

    .product-showcase-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .config-options {
        gap: 4px;
    }

    .config-opt .opt-label {
        padding: 5px 10px;
        font-size: 11px;
    }
}

/* ===== 新闻与公告区块 ===== */
.news-section {
    background: linear-gradient(180deg, #0c1119 0%, #0d121c 100%);
    padding: 100px 0;
}

.news-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-top: 40px;
}

.news-column {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 16px;
    padding: 28px;
}

.news-col-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.2rem;
    color: #00d4ff;
    margin-bottom: 20px;
    padding-bottom: 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.news-item {
    display: flex;
    gap: 14px;
    padding: 14px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    transition: all 0.3s;
}

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

.news-item:hover {
    background: rgba(0, 212, 255, 0.04);
    margin: 0 -12px;
    padding: 14px 12px;
    border-radius: 8px;
}

.news-item time {
    color: #666;
    font-size: 0.8rem;
    white-space: nowrap;
    min-width: 42px;
    font-family: 'Orbitron', monospace;
    padding-top: 2px;
}

.news-content a {
    color: #e0e0e0;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    line-height: 1.4;
    transition: color 0.3s;
}

.news-content a:hover {
    color: #00d4ff;
}

.news-excerpt {
    color: #777;
    font-size: 0.82rem;
    margin-top: 4px;
    line-height: 1.5;
}

.news-pin-badge {
    display: inline-block;
    padding: 1px 6px;
    background: #00d4ff;
    color: #000;
    font-size: 10px;
    font-weight: 700;
    border-radius: 3px;
    vertical-align: middle;
}

.news-pinned {
    border-left: 2px solid #00d4ff;
    padding-left: 12px !important;
}

@media (max-width: 768px) {
    .news-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .news-item {
        flex-direction: column;
        gap: 6px;
    }
    .news-thumb {
        width: 100% !important;
        height: auto !important;
        max-height: 160px;
    }
    .news-more {
        flex-direction: column;
        gap: 12px !important;
        align-items: center;
    }
}

/* 新闻缩略图 */
.news-thumb {
    flex-shrink: 0;
    width: 120px;
    height: 80px;
    border-radius: 8px;
    overflow: hidden;
}

.news-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* 新闻内容区 */
.news-content {
    flex: 1;
    min-width: 0;
}

/* 空状态 */
.news-empty {
    text-align: center;
    padding: 40px 20px;
    color: #555;
    font-size: 0.95rem;
}

/* 查看更多按钮区 */
.news-more {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-top: 30px;
}

/* ===== 减少动画偏好 ===== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}