/* ============================================
   STARMOL — 星际分子官网
   科技感 · 简洁 · 突出AI与高质量交付
   ============================================ */

/* === 基础变量 === */
:root {
    --color-bg: #0B0E13;
    --color-bg-2: #0F1319;
    --color-bg-3: #141922;
    --color-surface: rgba(255, 255, 255, 0.03);
    --color-surface-hover: rgba(255, 255, 255, 0.06);
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-bright: rgba(106, 168, 160, 0.3);
    --color-text: #E8ECF4;
    --color-text-dim: #8892A6;
    --color-text-muted: #5A6378;
    --color-cyan: #6AA8A0;
    --color-purple: #C9A86A;
    --color-cyan-dim: rgba(106, 168, 160, 0.15);
    --color-purple-dim: rgba(201, 168, 106, 0.15);
    --gradient: linear-gradient(135deg, #6AA8A0 0%, #C9A86A 100%);
    --gradient-text: linear-gradient(135deg, #6AA8A0 0%, #C9A86A 100%);
    --radius: 16px;
    --radius-sm: 10px;
    --max-width: 1200px;
    --font-sans: 'Space Grotesk', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-cn: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* === Reset === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

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

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

ul {
    list-style: none;
}

::selection {
    background: rgba(106, 168, 160, 0.3);
    color: #fff;
}

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

.section {
    padding: 120px 0;
    position: relative;
}

.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-num {
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 4px;
    color: var(--color-cyan);
    margin-bottom: 12px;
}

.section-title {
    font-size: 40px;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 8px;
}

.section-subtitle {
    font-size: 14px;
    color: var(--color-text-muted);
    letter-spacing: 3px;
    text-transform: uppercase;
    font-weight: 400;
}

/* === 按钮 === */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 500;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient);
    color: #0B0E13;
    font-weight: 600;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(106, 168, 160, 0.3);
}

.btn-ghost {
    background: var(--color-surface);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-ghost:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-border-bright);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* === 导航栏 === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(11, 14, 19, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    padding: 14px 0;
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    transition: opacity 0.2s;
}

.nav-logo:hover {
    opacity: 0.8;
}

.logo-text-cn {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 1px;
    font-family: var(--font-cn);
}

.logo-text {
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 2px;
}

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

.nav-link {
    font-size: 14px;
    color: var(--color-text-dim);
    transition: color 0.2s;
    position: relative;
    font-weight: 500;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient);
    transition: width 0.3s ease;
}

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

.nav-cta {
    padding: 8px 20px;
    border-radius: 8px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text);
}

.nav-cta:hover {
    background: var(--color-cyan-dim);
    border-color: var(--color-border-bright);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: all 0.3s;
    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 === */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 80px 24px 40px;
}

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

.hero-bg-gradient {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 30% 20%, rgba(106, 168, 160, 0.12) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 80%, rgba(201, 168, 106, 0.1) 0%, transparent 50%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    font-size: 13px;
    color: var(--color-text-dim);
    margin-bottom: 32px;
    backdrop-filter: blur(10px);
}

.tag-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-cyan);
    box-shadow: 0 0 8px var(--color-cyan);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero-title {
    font-size: 72px;
    font-weight: 900;
    line-height: 1.05;
    margin-bottom: 24px;
    letter-spacing: -2px;
}

.hero-subtitle-en {
    font-size: 48px;
    font-weight: 300;
    letter-spacing: 8px;
    color: var(--color-text-dim);
}

.hero-desc {
    font-size: 18px;
    color: var(--color-text-dim);
    line-height: 1.8;
    margin-bottom: 40px;
    font-family: var(--font-cn);
}

.hero-desc strong {
    color: var(--color-text);
    font-weight: 500;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 72px;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    padding: 24px 40px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    backdrop-filter: blur(10px);
}

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

.stat-num {
    font-size: 32px;
    font-weight: 700;
    color: var(--color-cyan);
    line-height: 1;
    margin-bottom: 6px;
}

.stat-label {
    font-size: 12px;
    color: var(--color-text-muted);
    letter-spacing: 1px;
}

.stat-divider {
    width: 1px;
    height: 36px;
    background: var(--color-border);
}

.hero-scroll {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    z-index: 2;
}

.hero-scroll span {
    font-size: 11px;
    color: var(--color-text-muted);
    letter-spacing: 2px;
    text-transform: uppercase;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-cyan), transparent);
    animation: scrollDown 2s ease-in-out infinite;
}

@keyframes scrollDown {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    51% { transform: scaleY(1); transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

/* === 公司介绍 === */
.about-section {
    background: var(--color-bg);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: start;
}

.about-text {
    padding-right: 24px;
}

.about-name {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 4px;
}

.about-en {
    font-size: 14px;
    color: var(--color-text-muted);
    letter-spacing: 1px;
    margin-bottom: 24px;
}

.about-desc {
    font-size: 15px;
    color: var(--color-text-dim);
    line-height: 1.9;
    margin-bottom: 16px;
    font-family: var(--font-cn);
}

.highlight {
    color: var(--color-cyan);
    font-weight: 500;
}

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

.about-card {
    padding: 28px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: all 0.3s ease;
}

.about-card:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-border-bright);
    transform: translateY(-4px);
}

.card-icon {
    margin-bottom: 16px;
}

.about-card h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}

.about-card p {
    font-size: 13px;
    color: var(--color-text-dim);
    line-height: 1.6;
    font-family: var(--font-cn);
}

/* === 核心服务 === */
.services-section {
    background: var(--color-bg-2);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.service-card {
    padding: 40px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.service-card:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-border-bright);
    transform: translateY(-4px);
}

.service-featured {
    border-color: rgba(106, 168, 160, 0.15);
}

.service-featured::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient);
    opacity: 0;
    transition: opacity 0.3s;
}

.service-featured:hover::before {
    opacity: 1;
}

.service-badge {
    display: inline-block;
    padding: 4px 12px;
    background: var(--color-cyan-dim);
    color: var(--color-cyan);
    font-size: 12px;
    font-weight: 500;
    border-radius: 100px;
    margin-bottom: 20px;
}

.service-icon {
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
}

.service-desc {
    font-size: 14px;
    color: var(--color-text-dim);
    line-height: 1.7;
    margin-bottom: 20px;
    font-family: var(--font-cn);
}

.service-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.service-list li {
    font-size: 13px;
    color: var(--color-text-dim);
    padding-left: 20px;
    position: relative;
    font-family: var(--font-cn);
}

.service-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 8px;
    height: 2px;
    background: var(--color-cyan);
    border-radius: 1px;
}

/* === 重要项目 === */
.projects-section {
    background: var(--color-bg);
}

.projects-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.project-card {
    display: flex;
    gap: 32px;
    padding: 40px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: all 0.3s ease;
}

.project-card:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-border-bright);
}

.project-num {
    font-size: 48px;
    font-weight: 900;
    color: var(--color-text-muted);
    opacity: 0.3;
    line-height: 1;
    flex-shrink: 0;
    min-width: 80px;
}

.project-body {
    flex: 1;
}

.project-tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--color-purple-dim);
    color: #E0CC9E;
    font-size: 12px;
    border-radius: 100px;
    margin-bottom: 12px;
    font-family: var(--font-cn);
}

.project-body h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 20px;
    font-family: var(--font-cn);
}

.project-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 16px;
}

.feature strong {
    display: block;
    font-size: 15px;
    font-weight: 600;
    color: var(--color-cyan);
    margin-bottom: 4px;
    font-family: var(--font-cn);
}

.feature p {
    font-size: 13px;
    color: var(--color-text-dim);
    line-height: 1.7;
    font-family: var(--font-cn);
}

.project-result {
    font-size: 13px;
    color: var(--color-text-muted);
    padding: 12px 16px;
    background: var(--color-cyan-dim);
    border-radius: var(--radius-sm);
    margin-top: 12px;
    font-family: var(--font-cn);
    border-left: 3px solid var(--color-cyan);
}

/* === AI 产品 === */
.ai-section {
    background: var(--color-bg-2);
    position: relative;
    overflow: hidden;
}

.ai-bg-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(201, 168, 106, 0.06) 0%, transparent 60%);
    pointer-events: none;
}

.ai-product-hero {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 48px;
    margin-bottom: 32px;
    position: relative;
    overflow: hidden;
}

.ai-product-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(106, 168, 160, 0.08) 0%, transparent 60%);
    pointer-events: none;
}

.ai-product-header {
    margin-bottom: 40px;
    position: relative;
}

.ai-product-tag {
    display: inline-block;
    padding: 4px 14px;
    background: var(--color-cyan-dim);
    color: var(--color-cyan);
    font-size: 12px;
    font-weight: 500;
    border-radius: 100px;
    margin-bottom: 16px;
}

.ai-product-header h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 12px;
    font-family: var(--font-cn);
}

.ai-product-desc {
    font-size: 15px;
    color: var(--color-text-dim);
    line-height: 1.8;
    max-width: 800px;
    font-family: var(--font-cn);
}

/* AI 流程图 */
.ai-flow {
    display: flex;
    align-items: stretch;
    gap: 16px;
    margin-bottom: 32px;
    flex-wrap: wrap;
    justify-content: center;
}

.ai-flow-step {
    flex: 1;
    min-width: 200px;
    padding: 28px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    text-align: center;
    transition: all 0.3s ease;
}

.ai-flow-step:hover {
    border-color: var(--color-border-bright);
    background: rgba(0, 0, 0, 0.4);
}

.flow-step-num {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-cyan);
    margin-bottom: 12px;
    letter-spacing: 2px;
}

.ai-flow-step h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
}

.ai-flow-step p {
    font-size: 13px;
    color: var(--color-text-dim);
    line-height: 1.8;
    font-family: var(--font-cn);
}

.ai-flow-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
}

.ai-capabilities {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    padding: 24px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}

.cap-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--color-text-dim);
    font-family: var(--font-cn);
}

.cap-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-cyan);
    flex-shrink: 0;
}

/* AI 产品卡片网格 */
.ai-products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.ai-product-card {
    padding: 36px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: all 0.3s ease;
}

.ai-product-card:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-border-bright);
    transform: translateY(-4px);
}

.ai-card-icon {
    margin-bottom: 20px;
}

.ai-product-card h4 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    font-family: var(--font-cn);
}

.ai-card-desc {
    font-size: 13px;
    color: var(--color-text-dim);
    line-height: 1.7;
    margin-bottom: 16px;
    font-family: var(--font-cn);
}

.ai-card-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.ai-chip {
    padding: 4px 12px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    font-size: 12px;
    color: var(--color-text-dim);
    font-family: var(--font-cn);
}

.ai-card-industry {
    font-size: 12px;
    color: var(--color-text-muted);
    line-height: 1.6;
    font-family: var(--font-cn);
    padding-top: 12px;
    border-top: 1px solid var(--color-border);
}

/* 数据分析产品 */
.data-products {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.data-product-item {
    padding: 28px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: all 0.3s ease;
}

.data-product-item:hover {
    border-color: var(--color-border-bright);
}

.data-product-item h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
    color: #E0CC9E;
    font-family: var(--font-cn);
}

.data-product-item p {
    font-size: 13px;
    color: var(--color-text-dim);
    line-height: 1.7;
    font-family: var(--font-cn);
}

/* === 团队介绍 === */
.team-section {
    background: var(--color-bg);
}

.team-intro {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-bottom: 56px;
    padding: 32px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}

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

.team-stat-num {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-cyan);
    margin-bottom: 4px;
}

.team-stat-label {
    font-size: 13px;
    color: var(--color-text-muted);
    font-family: var(--font-cn);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 64px;
}

.team-card {
    padding: 28px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: all 0.3s ease;
    text-align: center;
}

.team-card:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-border-bright);
    transform: translateY(-4px);
}

.team-lead {
    border-color: var(--color-border-bright);
    background: linear-gradient(135deg, rgba(106, 168, 160, 0.05) 0%, rgba(201, 168, 106, 0.05) 100%);
}

.team-avatar {
    display: flex;
    justify-content: center;
    margin-bottom: 16px;
}

.team-info h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 4px;
}

.team-role {
    display: inline-block;
    font-size: 13px;
    color: var(--color-cyan);
    margin-bottom: 8px;
    font-family: var(--font-cn);
    font-weight: 500;
}

.team-bg {
    font-size: 12px;
    color: var(--color-text-muted);
    line-height: 1.6;
    font-family: var(--font-cn);
}

/* 专利 */
.patents-section {
    padding: 48px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}

.patents-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 32px;
    text-align: center;
    font-family: var(--font-cn);
}

.patents-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

.patent-item {
    padding: 20px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
}

.patent-item:hover {
    border-color: var(--color-border-bright);
}

.patent-id {
    display: block;
    font-size: 14px;
    font-weight: 700;
    color: var(--color-cyan);
    margin-bottom: 4px;
    letter-spacing: 1px;
}

.patent-item p {
    font-size: 13px;
    color: var(--color-text-dim);
    line-height: 1.5;
    font-family: var(--font-cn);
}

/* === 服务行业 === */
.industries-section {
    background: var(--color-bg-2);
}

.industries-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 20px;
}

.industry-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 36px 20px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: all 0.3s ease;
}

.industry-item:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-border-bright);
    transform: translateY(-4px);
}

.industry-item span {
    font-size: 16px;
    font-weight: 500;
    font-family: var(--font-cn);
    color: var(--color-text-dim);
}

/* === 联系我们 === */
.contact-section {
    background: var(--color-bg);
    padding: 100px 0;
}

.contact-wrap {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 64px;
    align-items: center;
}

.contact-title {
    font-size: 44px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    font-family: var(--font-cn);
}

.contact-desc {
    font-size: 16px;
    color: var(--color-text-dim);
    line-height: 1.8;
    margin-bottom: 32px;
    font-family: var(--font-cn);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    color: var(--color-text-dim);
    font-family: var(--font-cn);
}

.contact-right {
    position: relative;
}

.contact-card {
    padding: 40px;
    background: var(--color-surface);
    border: 1px solid var(--color-border-bright);
    border-radius: var(--radius);
    position: relative;
    overflow: hidden;
}

.contact-card-glow {
    position: absolute;
    top: -100px;
    right: -100px;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(106, 168, 160, 0.12) 0%, transparent 60%);
    pointer-events: none;
}

.contact-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
    font-family: var(--font-cn);
    position: relative;
}

.contact-card p {
    font-size: 14px;
    color: var(--color-text-dim);
    line-height: 1.7;
    margin-bottom: 24px;
    font-family: var(--font-cn);
    position: relative;
}

/* === Footer === */
.footer {
    background: var(--color-bg-2);
    padding: 48px 0;
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 24px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-name {
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 2px;
}

.footer-name-cn {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-text-muted);
    font-family: var(--font-cn);
    letter-spacing: 1px;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    font-size: 13px;
    color: var(--color-text-dim);
    transition: color 0.2s;
    font-family: var(--font-cn);
}

.footer-links a:hover {
    color: var(--color-cyan);
}

.footer-copy {
    text-align: right;
}

.footer-copy p {
    font-size: 12px;
    color: var(--color-text-muted);
    line-height: 1.6;
    font-family: var(--font-cn);
}

.footer-beian {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    justify-content: flex-end;
    margin-top: 8px;
}

.footer-beian a {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    color: var(--color-text-muted);
    font-family: var(--font-cn);
    transition: color 0.2s;
}

.footer-beian a:hover {
    color: var(--color-cyan);
}

.footer-beian .beian-icon {
    display: inline-block;
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

/* === 滚动动画 === */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* === 响应式 === */
@media (max-width: 968px) {
    .section {
        padding: 80px 0;
    }

    .section-title {
        font-size: 32px;
    }

    .hero-title {
        font-size: 48px;
    }

    .hero-subtitle-en {
        font-size: 32px;
    }

    .hero-stats {
        flex-wrap: wrap;
        gap: 16px;
        padding: 20px;
    }

    .stat-divider {
        display: none;
    }

    .about-content,
    .services-grid,
    .contact-wrap {
        grid-template-columns: 1fr;
        gap: 32px;
    }

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

    .ai-flow {
        flex-direction: column;
    }

    .ai-flow-arrow {
        transform: rotate(90deg);
        padding: 8px 0;
    }

    .project-card {
        flex-direction: column;
        gap: 12px;
        padding: 28px;
    }

    .project-num {
        font-size: 32px;
    }

    .team-intro {
        flex-wrap: wrap;
        gap: 24px;
        justify-content: center;
    }

    .ai-product-hero {
        padding: 32px;
    }

    .nav-menu {
        display: none;
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(11, 14, 19, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--color-border);
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }

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

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

    .footer-beian {
        justify-content: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .contact-title {
        font-size: 32px;
    }

    .ai-capabilities {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .about-cards {
        grid-template-columns: 1fr;
    }

    .patents-section {
        padding: 28px;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle-en {
        font-size: 24px;
        letter-spacing: 4px;
    }
}