/* ----------------------------------------------------
   设计系统与CSS全局变量
---------------------------------------------------- */
:root {
    /* 核心字体 */
    --font-sans: 'Outfit', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    
    /* 默认暗色模式变量 */
    --bg-primary: #080b11;
    --bg-secondary: #0f1422;
    --bg-tertiary: #161c2d;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-color-hover: rgba(255, 255, 255, 0.15);
    
    /* 玻璃拟态配置 */
    --glass-bg: rgba(15, 20, 34, 0.6);
    --glass-border: rgba(255, 255, 255, 0.06);
    --glass-shadow: rgba(0, 0, 0, 0.4);
    
    /* 科技感氛围色彩 */
    --accent-violet: #8b5cf6;
    --accent-violet-glow: rgba(139, 92, 246, 0.25);
    --accent-cyan: #06b6d4;
    --accent-cyan-glow: rgba(6, 182, 212, 0.25);
    --accent-pink: #d946ef;
    --accent-pink-glow: rgba(217, 70, 239, 0.25);
    --accent-yellow: #f59e0b;
    --accent-yellow-glow: rgba(245, 158, 11, 0.25);
    
    /* 渐变配置 */
    --grad-hero: linear-gradient(135deg, #8b5cf6 0%, #06b6d4 100%);
    --grad-card: linear-gradient(180deg, rgba(255, 255, 255, 0.03) 0%, rgba(255, 255, 255, 0) 100%);
    --grad-card-hover: linear-gradient(180deg, rgba(139, 92, 246, 0.05) 0%, rgba(6, 182, 212, 0.05) 100%);
    
    /* 其他变量 */
    --header-height: 80px;
    --border-radius-sm: 8px;
    --border-radius-md: 16px;
    --border-radius-lg: 24px;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-slow: 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 亮色模式变量覆盖 */
body.light-theme {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #94a3b8;
    --border-color: rgba(15, 23, 42, 0.08);
    --border-color-hover: rgba(15, 23, 42, 0.15);
    
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(15, 23, 42, 0.06);
    --glass-shadow: rgba(15, 23, 42, 0.05);
    
    --accent-violet-glow: rgba(139, 92, 246, 0.15);
    --accent-cyan-glow: rgba(6, 182, 212, 0.15);
    --accent-pink-glow: rgba(217, 70, 239, 0.15);
    --accent-yellow-glow: rgba(245, 158, 11, 0.15);
    
    --grad-card: linear-gradient(180deg, rgba(15, 23, 42, 0.01) 0%, rgba(15, 23, 42, 0) 100%);
    --grad-card-hover: linear-gradient(180deg, rgba(139, 92, 246, 0.03) 0%, rgba(6, 182, 212, 0.03) 100%);
}

/* ----------------------------------------------------
   基础样式重置
---------------------------------------------------- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    overflow-x: hidden;
    line-height: 1.6;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* 滚动条美化 */
::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border: 2px solid var(--bg-primary);
    border-radius: 5px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

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

ul, ol {
    list-style: none;
}

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

button, input, select, textarea {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
    background: none;
    border: none;
    outline: none;
}

/* Canvas 背景 */
#neural-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: auto;
    transition: opacity 1s ease;
}

body.light-theme #neural-canvas {
    opacity: 0.15; /* 亮色模式下降低神经网络背景浓度以保证对比度 */
}

/* ----------------------------------------------------
   排版与基础原子样式
---------------------------------------------------- */
.section-title {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 60px;
    padding: 0 20px;
}

.section-title h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--text-primary) 30%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-title p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.sub-title {
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--accent-cyan);
    text-transform: uppercase;
    display: block;
    margin-bottom: 10px;
}

/* 按钮通用组件 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-weight: 600;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--grad-hero);
    color: #ffffff;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(139, 92, 246, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--border-color-hover);
    transform: translateY(-2px);
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.9rem;
}

.shadow-glow {
    box-shadow: 0 0 20px rgba(6, 182, 212, 0.15);
}

/* 脉冲红点 */
.pulse-dot {
    width: 8px;
    height: 8px;
    background-color: var(--accent-cyan);
    border-radius: 50%;
    display: inline-block;
    box-shadow: 0 0 8px var(--accent-cyan);
    animation: pulse 2s infinite;
}

/* ----------------------------------------------------
   导航栏样式
---------------------------------------------------- */
#main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: rgba(8, 11, 17, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 100;
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

body.light-theme #main-header {
    background-color: rgba(248, 250, 252, 0.7);
}

.nav-container {
    max-width: 1280px;
    height: 100%;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-img {
    width: 38px;
    height: 38px;
    transition: transform var(--transition-normal);
}

.logo-area:hover .logo-img {
    transform: rotate(15deg) scale(1.05);
}

.brand-text {
    font-size: 1.3rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--text-primary) 50%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

.nav-item {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 6px 0;
    transition: color var(--transition-fast);
}

.nav-item:hover {
    color: var(--text-primary);
}

.nav-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--grad-hero);
    transition: width var(--transition-normal);
    border-radius: 2px;
}

.nav-item.active {
    color: var(--text-primary);
    font-weight: 600;
}

.nav-item.active::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.icon-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

.icon-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--border-color-hover);
}

#mobile-menu-btn {
    display: none;
}

/* 亮/暗模式图标切换 */
#theme-toggle .sun-icon {
    display: none;
}
#theme-toggle .moon-icon {
    display: block;
}
body.light-theme #theme-toggle .sun-icon {
    display: block;
}
body.light-theme #theme-toggle .moon-icon {
    display: none;
}

/* 手机折叠菜单 */
.mobile-nav-panel {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    z-index: 99;
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.mobile-nav-panel.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
}

.mobile-nav-item {
    font-size: 1.1rem;
    font-weight: 500;
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.02);
}

/* ----------------------------------------------------
   英雄首屏样式
---------------------------------------------------- */
.hero-section {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 140px 24px 80px;
    max-width: 1280px;
    margin: 0 auto;
    text-align: center;
    position: relative;
}

.hero-content {
    max-width: 860px;
    margin-bottom: 80px;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 24px;
}

body.light-theme .badge {
    background: rgba(139, 92, 246, 0.05);
}

.hero-content h1 {
    font-size: 4.5rem;
    font-weight: 900;
    line-height: 1.15;
    letter-spacing: -2px;
    margin-bottom: 24px;
    background: linear-gradient(135deg, #ffffff 10%, #a78bfa 50%, #06b6d4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

body.light-theme .hero-content h1 {
    background: linear-gradient(135deg, #0f172a 10%, #7c3aed 60%, #0891b2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.slogan-desc {
    font-size: 1.3rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

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

/* 英雄区底部浮动特色卡片 */
.hero-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    width: 100%;
    max-width: 1100px;
}

.h-feature-card {
    background-color: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    padding: 30px 24px;
    text-align: left;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 10px 30px var(--glass-shadow);
    transition: all var(--transition-normal);
}

.h-feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-color-hover);
}

.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: #ffffff;
}

.violet-glow {
    background: linear-gradient(135deg, #8b5cf6, #7c3aed);
    box-shadow: 0 0 15px var(--accent-violet-glow);
}
.cyan-glow {
    background: linear-gradient(135deg, #06b6d4, #0891b2);
    box-shadow: 0 0 15px var(--accent-cyan-glow);
}
.pink-glow {
    background: linear-gradient(135deg, #ec4899, #d946ef);
    box-shadow: 0 0 15px var(--accent-pink-glow);
}
.yellow-glow {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    box-shadow: 0 0 15px var(--accent-yellow-glow);
}

.h-feature-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.h-feature-card p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ----------------------------------------------------
   AI服务范围样式
---------------------------------------------------- */
.services-section {
    padding: 100px 24px;
    max-width: 1280px;
    margin: 0 auto;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.service-card {
    background-color: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    padding: 48px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 20px 40px var(--glass-shadow);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--grad-card);
    z-index: 1;
    pointer-events: none;
}

.service-card:hover {
    transform: translateY(-5px);
    border-color: var(--border-color-hover);
    box-shadow: 0 30px 60px rgba(0,0,0,0.3);
}

.service-card:hover::before {
    background: var(--grad-card-hover);
}

.service-icon-wrap {
    width: 60px;
    height: 60px;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 30px;
    color: #ffffff;
    position: relative;
    z-index: 2;
}

.service-card h3 {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 16px;
    position: relative;
    z-index: 2;
}

.service-card p {
    color: var(--text-secondary);
    font-size: 0.98rem;
    margin-bottom: 24px;
    line-height: 1.6;
    position: relative;
    z-index: 2;
}

.service-bullets {
    position: relative;
    z-index: 2;
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.service-bullets li {
    font-size: 0.9rem;
    color: var(--text-primary);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
}

.service-bullets li::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--accent-cyan);
    display: inline-block;
}

/* ----------------------------------------------------
   行业解决方案样式
---------------------------------------------------- */
.solutions-section {
    padding: 100px 24px;
    max-width: 1280px;
    margin: 0 auto;
}

.solutions-container {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 40px;
    align-items: flex-start;
}

.solutions-tabs {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.tab-btn {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 18px 24px;
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    text-align: left;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tab-icon {
    font-size: 1.3rem;
}

.tab-btn:hover {
    background-color: rgba(255, 255, 255, 0.05);
    border-color: var(--border-color-hover);
    transform: translateX(5px);
}

.tab-btn.active {
    background: var(--grad-hero);
    color: #ffffff;
    border-color: transparent;
    box-shadow: 0 8px 20px rgba(139, 92, 246, 0.3);
}

.solutions-details {
    background-color: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    padding: 48px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 20px 40px var(--glass-shadow);
    min-height: 480px;
    position: relative;
}

.solution-pane {
    display: none;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 40px;
    animation: fadeIn 0.5s ease forwards;
}

.solution-pane.active {
    display: grid;
}

.sol-info {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.sol-badge {
    padding: 4px 12px;
    background-color: rgba(6, 182, 212, 0.1);
    border: 1.5px solid var(--accent-cyan);
    color: var(--accent-cyan);
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.sol-info h3 {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 16px;
}

.sol-desc {
    color: var(--text-secondary);
    font-size: 0.96rem;
    line-height: 1.6;
    margin-bottom: 30px;
}

.sol-features {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 36px;
    width: 100%;
}

.sol-feat-item {
    border-left: 3px solid var(--accent-violet);
    padding-left: 16px;
}

.sol-feat-item strong {
    display: block;
    font-size: 1rem;
    margin-bottom: 4px;
}

.sol-feat-item span {
    font-size: 0.88rem;
    color: var(--text-secondary);
    display: block;
}

.sol-preview {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 交互式终端模拟器 */
.interactive-preview-ui {
    width: 100%;
    background-color: #0b0f17;
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--border-radius-sm);
    box-shadow: 0 15px 35px rgba(0,0,0,0.5);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.ui-header {
    background-color: rgba(255,255,255,0.03);
    padding: 10px 16px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.ui-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin-right: 6px;
}
.ui-dot.color1 { background-color: #ef4444; }
.ui-dot.color2 { background-color: #eab308; }
.ui-dot.color3 { background-color: #22c55e; }

.ui-title {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: monospace;
    margin-left: auto;
}

.ui-body {
    padding: 20px;
    font-family: monospace;
    font-size: 0.8rem;
    line-height: 1.5;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.chat-msg {
    padding: 10px;
    border-radius: 4px;
    max-width: 90%;
}

.chat-msg.user {
    background-color: rgba(255,255,255,0.05);
    color: var(--text-primary);
    align-self: flex-end;
    border-bottom-right-radius: 0;
}

.chat-msg.assistant {
    background-color: rgba(139, 92, 246, 0.1);
    color: var(--text-secondary);
    align-self: flex-start;
    border-bottom-left-radius: 0;
    border: 1px solid rgba(139, 92, 246, 0.15);
}

.typing-text {
    min-height: 40px;
}

.source-link {
    font-size: 0.75rem;
    color: var(--accent-cyan);
    margin-top: 8px;
    display: inline-block;
}

/* 视觉相机模拟器 */
.visual-box {
    padding: 0;
    height: 250px;
    position: relative;
    overflow: hidden;
}

.camera-lens {
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(15,20,34,0.3) 0%, rgba(8,11,17,0.9) 100%), 
                repeating-linear-gradient(0deg, rgba(255,255,255,0.02) 0px, rgba(255,255,255,0.02) 1px, transparent 1px, transparent 10px);
    position: relative;
    border-radius: 4px;
}

.bounding-box {
    position: absolute;
    border: 2px solid #ef4444;
    border-radius: 2px;
    animation: alertPulse 1.5s infinite;
}

.bbox-label {
    position: absolute;
    top: -20px;
    left: -2px;
    background-color: #ef4444;
    color: #ffffff;
    font-size: 9px;
    font-weight: bold;
    padding: 1px 4px;
    border-radius: 2px;
    white-space: nowrap;
}

.reticle {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 30px;
    height: 30px;
    border: 2px stroke rgba(6, 182, 212, 0.4);
    transform: translate(-50%, -50%);
}

.reticle::before, .reticle::after {
    content: '';
    position: absolute;
    background-color: rgba(6, 182, 212, 0.4);
}
.reticle::before {
    top: 50%; left: -10px; width: 50px; height: 1px;
}
.reticle::after {
    left: 50%; top: -10px; height: 50px; width: 1px;
}

.status-overlay {
    position: absolute;
    bottom: 12px;
    right: 12px;
    color: #22c55e;
    font-size: 10px;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 6px;
}

.status-overlay::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: #22c55e;
    box-shadow: 0 0 6px #22c55e;
    display: inline-block;
}

/* 图表模拟 */
.mock-chart {
    display: flex;
    align-items: flex-end;
    gap: 16px;
    height: 80px;
    margin-top: 14px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    padding-bottom: 6px;
}

.mock-chart .bar {
    flex-grow: 1;
    background-color: rgba(255,255,255,0.1);
    border-radius: 2px;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    position: relative;
    transition: height 0.5s ease;
}

.mock-chart .bar span {
    font-size: 9px;
    color: var(--text-muted);
    position: absolute;
    bottom: -18px;
}

.mock-chart .bar.active {
    background: var(--grad-hero);
}

/* ----------------------------------------------------
   关于我们样式
---------------------------------------------------- */
.about-section {
    padding: 100px 24px;
    max-width: 1280px;
    margin: 0 auto;
}

.about-container {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 64px;
    align-items: center;
}

.about-text-content h3 {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 20px;
}

.about-text-content p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: 24px;
}

.about-values {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-top: 40px;
}

.value-item {
    display: grid;
    grid-template-columns: 48px 1fr;
    gap: 16px;
}

.val-num {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--accent-cyan);
    font-family: monospace;
    border-bottom: 2px solid var(--accent-cyan);
    padding-bottom: 4px;
    align-self: flex-start;
}

.value-item h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.value-item p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    margin: 0;
}

.about-tech-stack {
    display: flex;
    justify-content: center;
}

.stack-card {
    background-color: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    padding: 40px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 20px 40px var(--glass-shadow);
    width: 100%;
    position: relative;
    overflow: hidden;
}

.stack-card h4 {
    font-size: 1.2rem;
    font-weight: 800;
    margin-bottom: 24px;
    text-align: center;
}

.tech-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-bottom: 40px;
}

.tech-tag {
    background-color: rgba(255,255,255,0.03);
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.tech-tag:hover {
    background-color: rgba(139, 92, 246, 0.1);
    border-color: var(--accent-violet);
    color: #ffffff;
    transform: scale(1.05);
}

/* 动效球图 */
.stack-illustration {
    display: flex;
    justify-content: center;
    height: 180px;
    align-items: center;
    position: relative;
}

.illustration-core {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    background: var(--grad-hero);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-weight: 800;
    font-size: 0.9rem;
    box-shadow: 0 0 30px rgba(139, 92, 246, 0.6);
    position: relative;
    z-index: 2;
}

.pulse-ring {
    position: absolute;
    border: 1.5px solid var(--accent-cyan);
    border-radius: 50%;
    z-index: 1;
    opacity: 0;
}

.pulse-ring.ring-1 {
    width: 140px;
    height: 140px;
    animation: ringPulse 4s infinite linear;
}

.pulse-ring.ring-2 {
    width: 190px;
    height: 190px;
    animation: ringPulse 4s infinite linear 2s;
}

/* ----------------------------------------------------
   联系我们与留言表单样式
---------------------------------------------------- */
.contact-section {
    padding: 100px 24px;
    max-width: 1280px;
    margin: 0 auto;
}

.contact-container {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 48px;
    align-items: stretch;
}

.contact-info-cards {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-card-desc h3 {
    font-size: 1.3rem;
    font-weight: 800;
    margin-bottom: 12px;
    background: linear-gradient(135deg, var(--text-primary) 30%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.contact-card-desc p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 8px;
}

.contact-card {
    background-color: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    padding: 28px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 10px 20px var(--glass-shadow);
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.c-card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    flex-shrink: 0;
}

.c-card-text h4 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.c-card-text p {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.c-card-text span {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.contact-form-wrapper {
    background-color: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    padding: 48px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 20px 40px var(--glass-shadow);
    position: relative;
    overflow: hidden;
}

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

.form-group {
    margin-bottom: 24px;
    position: relative;
}

.form-group label {
    display: block;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    background-color: rgba(255,255,255,0.02);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 12px 16px;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color: var(--accent-cyan);
    background-color: rgba(255,255,255,0.05);
    box-shadow: 0 0 10px rgba(6, 182, 212, 0.15);
}

.form-group select option {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

/* 错误消息 */
.error-msg {
    color: #ef4444;
    font-size: 0.78rem;
    position: absolute;
    bottom: -18px;
    left: 2px;
    opacity: 0;
    transform: translateY(-5px);
    pointer-events: none;
    transition: all var(--transition-fast);
}

.form-group.has-error input, .form-group.has-error select, .form-group.has-error textarea {
    border-color: #ef4444;
    box-shadow: 0 0 8px rgba(239, 68, 68, 0.15);
}

.form-group.has-error .error-msg {
    opacity: 1;
    transform: translateY(0);
}

/* 提交加载微动画 */
.btn-spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #ffffff;
    border-radius: 50%;
    display: none;
    animation: spin 0.8s infinite linear;
}

#feedback-form.submitting #submit-btn {
    pointer-events: none;
    opacity: 0.8;
}
#feedback-form.submitting #submit-btn .btn-spinner {
    display: inline-block;
}
#feedback-form.submitting #submit-btn span:first-child {
    display: none;
}

/* 成功状态弹窗遮罩 */
.form-success-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-secondary);
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    opacity: 0;
    pointer-events: none;
    transform: scale(0.95);
    transition: all var(--transition-normal);
}

.form-success-overlay.show {
    opacity: 1;
    pointer-events: auto;
    transform: scale(1);
}

.success-content {
    text-align: center;
    max-width: 480px;
}

.success-icon-ring {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background-color: rgba(16, 185, 129, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    animation: scaleUp 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

.success-content h3 {
    font-size: 1.6rem;
    font-weight: 800;
    margin-bottom: 16px;
    color: #10b981;
}

.success-content p {
    color: var(--text-secondary);
    font-size: 0.94rem;
    line-height: 1.6;
    margin-bottom: 30px;
}

/* ----------------------------------------------------
   页脚样式
---------------------------------------------------- */
#main-footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 80px 24px 40px;
    transition: background-color var(--transition-normal);
}

.footer-container {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 80px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.footer-logo img {
    width: 32px;
    height: 32px;
}

.footer-logo span {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--text-primary);
}

.footer-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    max-width: 340px;
}

.footer-links-group {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-col h4 {
    font-size: 0.95rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-col li {
    font-size: 0.88rem;
    color: var(--text-secondary);
}

.footer-col li a:hover {
    color: var(--accent-cyan);
    text-decoration: underline;
}

.footer-bottom {
    max-width: 1280px;
    margin: 60px auto 0;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-copyright {
    display: flex;
    flex-direction: column;
    gap: 10px;
    font-size: 0.82rem;
    color: var(--text-muted);
}

.icp-number a {
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

.icp-number a:hover {
    color: var(--accent-cyan);
}

/* ----------------------------------------------------
   滚动入场动画控制
---------------------------------------------------- */
.scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* ----------------------------------------------------
   动画帧 (@keyframes)
---------------------------------------------------- */
@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(6, 182, 212, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(6, 182, 212, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(6, 182, 212, 0);
    }
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes ringPulse {
    0% {
        transform: scale(0.6);
        opacity: 0;
    }
    50% {
        opacity: 0.3;
    }
    100% {
        transform: scale(1.3);
        opacity: 0;
    }
}

@keyframes alertPulse {
    0% { border-color: rgba(239, 68, 68, 0.4); box-shadow: 0 0 0 rgba(239, 68, 68, 0); }
    50% { border-color: rgba(239, 68, 68, 1); box-shadow: 0 0 15px rgba(239, 68, 68, 0.3); }
    100% { border-color: rgba(239, 68, 68, 0.4); box-shadow: 0 0 0 rgba(239, 68, 68, 0); }
}

@keyframes scaleUp {
    from { transform: scale(0.8); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

/* ----------------------------------------------------
   响应式设计媒体查询 (Media Queries)
---------------------------------------------------- */
@media (max-width: 1024px) {
    .hero-content h1 {
        font-size: 3.5rem;
    }
    .hero-features {
        grid-template-columns: 1fr;
        max-width: 580px;
    }
    .services-grid {
        grid-template-columns: 1fr;
    }
    .solutions-container {
        grid-template-columns: 1fr;
    }
    .solutions-tabs {
        flex-direction: row;
        overflow-x: auto;
        padding-bottom: 10px;
    }
    .tab-btn {
        flex-shrink: 0;
    }
    .solution-pane {
        grid-template-columns: 1fr;
    }
    .about-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .contact-container {
        grid-template-columns: 1fr;
    }
    .footer-container {
        grid-template-columns: 1fr;
        gap: 48px;
    }
}

@media (max-width: 768px) {
    #mobile-menu-btn {
        display: flex;
    }
    .nav-links {
        display: none;
    }
    .hero-content h1 {
        font-size: 2.8rem;
    }
    .slogan-desc {
        font-size: 1.1rem;
    }
    .hero-btns {
        flex-direction: column;
        width: 100%;
        max-width: 280px;
        margin: 0 auto 40px;
    }
    .btn {
        width: 100%;
    }
    .solutions-details {
        padding: 24px;
    }
    .form-row-two {
        grid-template-columns: 1fr;
        gap: 0;
    }
    .contact-form-wrapper {
        padding: 24px;
    }
    .footer-links-group {
        grid-template-columns: 1fr;
        gap: 28px;
    }
}