/* ==========================================
   万岳科技官网 - CSS样式文件
   iOS 26 液态玻璃设计语言
   ========================================== */

/* CSS变量定义 - 浅色模式 */
:root,
[data-theme="light"] {
    --primary-color: #007AFF;
    --primary-dark: #0056CC;
    --primary-light: #409CFF;
    --secondary-color: #5AC8FA;
    --accent-color: #32ADE6;
    --text-primary: #1d1d1f;
    --text-secondary: #6e6e73;
    --text-light: #86868b;
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f7;
    --bg-tertiary: #fbfbfd;
    --bg-dark: #1d1d1f;
    --bg-gradient: linear-gradient(135deg, #4A9EFF 0%, #007AFF 50%, #0056CC 100%);
    --border-color: rgba(0, 0, 0, 0.1);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
    --gradient-primary: linear-gradient(135deg, #4A9EFF 0%, #007AFF 50%, #0056CC 100%);
    --gradient-dark: linear-gradient(135deg, #1d1d1f 0%, #2d2d2f 100%);
    --glass-bg: rgba(255, 255, 255, 0.72);
    --glass-border: rgba(255, 255, 255, 0.5);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    --glass-highlight: rgba(255, 255, 255, 0.9);
    --glass-inner-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8);
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 20px;
    --border-radius-xl: 28px;
    --border-radius-full: 9999px;
}

/* CSS变量定义 - 深色模式 */
[data-theme="dark"] {
    --primary-color: #0A84FF;
    --primary-dark: #409CFF;
    --primary-light: #64D2FF;
    --secondary-color: #64D2FF;
    --accent-color: #5AC8FA;
    --text-primary: #f5f5f7;
    --text-secondary: #a1a1a6;
    --text-light: #6e6e73;
    --bg-primary: #000000;
    --bg-secondary: #1c1c1e;
    --bg-tertiary: #2c2c2e;
    --bg-dark: #000000;
    --bg-gradient: linear-gradient(135deg, #0A84FF 0%, #007AFF 50%, #5AC8FA 100%);
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.6);
    --gradient-primary: linear-gradient(135deg, #0A84FF 0%, #007AFF 50%, #5AC8FA 100%);
    --gradient-dark: linear-gradient(135deg, #1c1c1e 0%, #2c2c2e 100%);
    --glass-bg: rgba(28, 28, 30, 0.72);
    --glass-border: rgba(255, 255, 255, 0.15);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --glass-highlight: rgba(255, 255, 255, 0.1);
    --glass-inner-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

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

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

/* 容器 */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ==========================================
   导航栏 - iOS 26 风格
   ========================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    transition: all var(--transition-normal);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--text-primary);
}

.logo-img {
    width: 36px;
    height: 36px;
    border-radius: var(--border-radius-sm);
}

.logo-dark {
    display: none;
}

[data-theme="dark"] .logo-light {
    display: none;
}

[data-theme="dark"] .logo-dark {
    display: block;
}

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

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

/* 主题切换按钮 */
.theme-toggle {
    position: relative;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--glass-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-full);
    color: var(--text-primary);
    transition: all var(--transition-normal);
}

.theme-toggle:hover {
    background: var(--bg-secondary);
    transform: scale(1.05);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
    transition: all var(--transition-normal);
}

/* 左下角固定主题切换 */
.theme-toggle-fixed {
    position: fixed;
    bottom: 24px;
    left: 24px;
    z-index: 999;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    color: var(--text-primary);
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.theme-toggle-fixed:hover {
    transform: scale(1.1) translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.theme-toggle-fixed:active {
    transform: scale(0.95);
}

.theme-toggle-fixed svg {
    width: 22px;
    height: 22px;
    transition: all 0.4s ease;
}

.theme-toggle-fixed:hover svg {
    transform: rotate(15deg);
}

.sun-icon {
    display: block;
}

.moon-icon {
    display: none;
}

[data-theme="dark"] .sun-icon {
    display: none;
}

[data-theme="dark"] .moon-icon {
    display: block;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    position: relative;
    padding: 8px 16px;
    font-weight: 500;
    font-size: 0.9375rem;
    color: var(--text-secondary);
    border-radius: var(--border-radius-full);
    transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    background: rgba(0, 122, 255, 0.1);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    background: var(--glass-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
}

.nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 1px;
    transition: all var(--transition-fast);
}

/* ==========================================
   按钮 - iOS 26 风格
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--border-radius-full);
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    cursor: pointer;
}

.btn svg {
    width: 18px;
    height: 18px;
    transition: transform var(--transition-normal);
}

.btn:hover svg {
    transform: translateX(4px);
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 14px 0 rgba(0, 122, 255, 0.4);
    border: none;
}

.btn-primary:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 24px 0 rgba(0, 122, 255, 0.5);
}

.btn-outline {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.btn-glass {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    box-shadow: var(--glass-shadow);
}

.btn-glass:hover {
    background: var(--bg-secondary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

/* ==========================================
   Hero区域 - 全新设计
   ========================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
    background: var(--bg-primary);
}

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

/* 背景动画 */
.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: 0;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: linear-gradient(135deg, rgba(0, 122, 255, 0.3), rgba(90, 200, 250, 0.2));
    top: -200px;
    left: -200px;
    animation-delay: 0s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, rgba(10, 132, 255, 0.25), rgba(0, 122, 255, 0.15));
    bottom: -150px;
    right: -150px;
    animation-delay: -5s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, rgba(90, 200, 250, 0.2), rgba(0, 122, 255, 0.1));
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -10s;
}

.grid-pattern {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(0, 122, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 122, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
}

.particles {
    position: absolute;
    inset: 0;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(30px, -30px) scale(1.05);
    }
    50% {
        transform: translate(-20px, 20px) scale(0.95);
    }
    75% {
        transform: translate(20px, 10px) scale(1.02);
    }
}

/* Hero内容 */
.hero-content {
    z-index: 1;
    position: relative;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-full);
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: #34C759;
    border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.5;
        transform: scale(0.8);
    }
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.title-line {
    display: block;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% 200%;
    animation: gradient-shift 5s ease infinite;
}

@keyframes gradient-shift {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 500px;
    line-height: 1.7;
}

.hero-stats {
    display: flex;
    gap: 32px;
    margin-bottom: 40px;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-light);
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
}

/* 滚动指示器 */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: var(--text-light);
    font-size: 0.75rem;
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--primary-color), transparent);
    animation: scroll-line 2s ease-in-out infinite;
}

@keyframes scroll-line {
    0% {
        transform: scaleY(0);
        transform-origin: top;
    }
    50% {
        transform: scaleY(1);
        transform-origin: top;
    }
    50.1% {
        transform-origin: bottom;
    }
    100% {
        transform: scaleY(0);
        transform-origin: bottom;
    }
}

/* AI大脑动画 - 增强版 */
.ai-brain {
    position: relative;
    width: 400px;
    height: 400px;
}

.brain-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(0, 122, 255, 0.3) 0%, transparent 70%);
    border-radius: 50%;
    animation: glow-pulse 4s ease-in-out infinite;
}

@keyframes glow-pulse {
    0%, 100% {
        opacity: 0.5;
        transform: translate(-50%, -50%) scale(1);
    }
    50% {
        opacity: 0.8;
        transform: translate(-50%, -50%) scale(1.1);
    }
}

.brain-core {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 120px;
    background: var(--gradient-primary);
    border-radius: 50%;
    box-shadow: 
        0 0 60px rgba(0, 122, 255, 0.5),
        0 0 120px rgba(0, 122, 255, 0.3),
        inset 0 0 40px rgba(255, 255, 255, 0.2);
    animation: core-pulse 3s ease-in-out infinite;
}

@keyframes core-pulse {
    0%, 100% {
        box-shadow: 
            0 0 60px rgba(0, 122, 255, 0.5),
            0 0 120px rgba(0, 122, 255, 0.3),
            inset 0 0 40px rgba(255, 255, 255, 0.2);
    }
    50% {
        box-shadow: 
            0 0 80px rgba(0, 122, 255, 0.6),
            0 0 150px rgba(0, 122, 255, 0.4),
            inset 0 0 50px rgba(255, 255, 255, 0.3);
    }
}

.brain-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 2px solid rgba(0, 122, 255, 0.2);
    border-radius: 50%;
    animation: ring-pulse 3s ease-in-out infinite;
}

.ring-1 {
    width: 200px;
    height: 200px;
    animation-delay: 0s;
}

.ring-2 {
    width: 280px;
    height: 280px;
    animation-delay: 0.5s;
}

.ring-3 {
    width: 360px;
    height: 360px;
    animation-delay: 1s;
}

.brain-nodes {
    position: absolute;
    inset: 0;
    animation: rotate 25s linear infinite;
}

.brain-nodes span {
    position: absolute;
    width: 10px;
    height: 10px;
    background: var(--primary-light);
    border-radius: 50%;
    box-shadow: 0 0 20px rgba(0, 122, 255, 0.5);
}

.brain-nodes span:nth-child(1) { top: 10%; left: 50%; }
.brain-nodes span:nth-child(2) { top: 25%; right: 15%; }
.brain-nodes span:nth-child(3) { top: 50%; right: 5%; }
.brain-nodes span:nth-child(4) { bottom: 25%; right: 15%; }
.brain-nodes span:nth-child(5) { bottom: 10%; left: 50%; }
.brain-nodes span:nth-child(6) { bottom: 25%; left: 15%; }
.brain-nodes span:nth-child(7) { top: 50%; left: 5%; }
.brain-nodes span:nth-child(8) { top: 25%; left: 15%; }

.brain-particles {
    position: absolute;
    inset: 0;
    animation: rotate 15s linear infinite reverse;
}

.brain-particles span {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--secondary-color);
    border-radius: 50%;
    opacity: 0.6;
}

.brain-particles span:nth-child(1) { top: 15%; left: 45%; animation: particle-float 3s ease-in-out infinite; }
.brain-particles span:nth-child(2) { top: 30%; right: 20%; animation: particle-float 3s ease-in-out infinite 0.3s; }
.brain-particles span:nth-child(3) { top: 55%; right: 10%; animation: particle-float 3s ease-in-out infinite 0.6s; }
.brain-particles span:nth-child(4) { bottom: 20%; right: 20%; animation: particle-float 3s ease-in-out infinite 0.9s; }
.brain-particles span:nth-child(5) { bottom: 15%; left: 45%; animation: particle-float 3s ease-in-out infinite 1.2s; }
.brain-particles span:nth-child(6) { bottom: 30%; left: 20%; animation: particle-float 3s ease-in-out infinite 1.5s; }
.brain-particles span:nth-child(7) { top: 45%; left: 10%; animation: particle-float 3s ease-in-out infinite 1.8s; }
.brain-particles span:nth-child(8) { top: 20%; left: 25%; animation: particle-float 3s ease-in-out infinite 2.1s; }

@keyframes ring-pulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.3;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.02);
        opacity: 0.6;
    }
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes particle-float {
    0%, 100% {
        transform: translate(0, 0);
        opacity: 0.6;
    }
    50% {
        transform: translate(10px, -10px);
        opacity: 1;
    }
}

/* ==========================================
   区域样式 - iOS 26 风格
   ========================================== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(0, 122, 255, 0.1);
    color: var(--primary-color);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--border-radius-full);
    margin-bottom: 16px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.section-title {
    font-size: 2.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-desc {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ==========================================
   服务区域
   ========================================== */
.services {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    position: relative;
    padding: 40px 30px;
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.service-card.featured {
    background: var(--gradient-primary);
    color: white;
}

.service-card.featured .service-title,
.service-card.featured .service-desc,
.service-card.featured .service-features li {
    color: white;
}

.service-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 4px 12px;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--border-radius-full);
}

.service-icon {
    width: 64px;
    height: 64px;
    margin-bottom: 24px;
    color: var(--primary-color);
}

.service-card.featured .service-icon {
    color: white;
}

.service-icon svg {
    width: 100%;
    height: 100%;
}

.service-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.service-desc {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.7;
}

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

.service-features li {
    position: relative;
    padding-left: 24px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.service-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 8px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 50%;
}

.service-card.featured .service-features li::before {
    background: white;
}

/* ==========================================
   产品展示区域 - iOS 26 液态玻璃设计
   ========================================== */
.products {
    padding: 100px 0;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    position: relative;
}

.products::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 30% 20%, rgba(0, 122, 255, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 70% 80%, rgba(90, 200, 250, 0.06) 0%, transparent 50%);
    pointer-events: none;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    position: relative;
    z-index: 1;
}

.product-card {
    position: relative;
    padding: 32px 28px;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.6);
    border-radius: var(--border-radius-lg);
    box-shadow: 
        0 4px 24px rgba(0, 0, 0, 0.06),
        0 1px 2px rgba(0, 0, 0, 0.04),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.9), transparent);
}

.product-card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.4) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.product-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 
        0 20px 40px rgba(0, 122, 255, 0.15),
        0 8px 16px rgba(0, 0, 0, 0.08),
        inset 0 1px 0 rgba(255, 255, 255, 0.9);
    border-color: rgba(0, 122, 255, 0.3);
}

.product-card:hover::after {
    opacity: 1;
}

.product-card.featured {
    background: linear-gradient(135deg, rgba(0, 122, 255, 0.9) 0%, rgba(0, 86, 204, 0.95) 100%);
    backdrop-filter: blur(20px) saturate(150%);
    -webkit-backdrop-filter: blur(20px) saturate(150%);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    box-shadow: 
        0 8px 32px rgba(0, 122, 255, 0.3),
        0 2px 8px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.product-card.featured::before {
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
}

.product-card.featured:hover {
    box-shadow: 
        0 24px 48px rgba(0, 122, 255, 0.4),
        0 12px 24px rgba(0, 0, 0, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.product-card.featured .product-name,
.product-card.featured .product-desc,
.product-card.featured .product-features li {
    color: white;
}

.product-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.product-icon {
    width: 52px;
    height: 52px;
    color: var(--primary-color);
    padding: 10px;
    background: rgba(0, 122, 255, 0.1);
    border-radius: var(--border-radius-md);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.product-card.featured .product-icon {
    color: white;
    background: rgba(255, 255, 255, 0.15);
}

.product-icon svg {
    width: 100%;
    height: 100%;
}

.product-badge {
    padding: 6px 14px;
    background: rgba(0, 122, 255, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--primary-color);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--border-radius-full);
    border: 1px solid rgba(0, 122, 255, 0.2);
}

.product-card.featured .product-badge {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border-color: rgba(255, 255, 255, 0.3);
}

.product-name {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.product-desc {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 24px;
}

.product-card:not(.featured) .product-desc {
    min-height: 80px;
}

.product-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.product-features li {
    position: relative;
    padding-left: 20px;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.product-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 7px;
    width: 6px;
    height: 6px;
    background: var(--primary-color);
    border-radius: 50%;
    box-shadow: 0 0 8px rgba(0, 122, 255, 0.5);
}

.product-card.featured .product-features li::before {
    background: white;
    box-shadow: 0 0 8px rgba(255, 255, 255, 0.5);
}

.product-channels {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.product-channels span {
    padding: 5px 12px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: white;
    font-size: 0.75rem;
    border-radius: var(--border-radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.product-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid rgba(0, 122, 255, 0.1);
}

.product-tags span {
    padding: 5px 12px;
    background: rgba(0, 122, 255, 0.08);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: var(--primary-color);
    font-size: 0.75rem;
    border-radius: var(--border-radius-sm);
    border: 1px solid rgba(0, 122, 255, 0.15);
    transition: all 0.2s ease;
}

.product-tags span:hover {
    background: rgba(0, 122, 255, 0.15);
    border-color: rgba(0, 122, 255, 0.3);
}

/* ==========================================
   关于区域
   ========================================== */
.about {
    padding: 100px 0;
}

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

.about-content .section-tag {
    display: inline-block;
}

.about-content .section-title {
    text-align: left;
    margin-bottom: 24px;
}

.about-text {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-stats {
    display: flex;
    gap: 40px;
    margin-top: 40px;
}

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

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 30px 20px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-md);
    transition: all var(--transition-normal);
}

.tech-item:hover {
    background: var(--bg-primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.tech-icon {
    width: 48px;
    height: 48px;
    color: var(--primary-color);
}

.tech-icon svg {
    width: 100%;
    height: 100%;
}

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

/* ==========================================
   联系区域
   ========================================== */
.contact {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

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

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
    background: var(--bg-primary);
    border-radius: var(--border-radius-md);
    transition: all var(--transition-normal);
}

.contact-item:hover {
    box-shadow: var(--shadow-md);
}

.contact-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 122, 255, 0.1);
    border-radius: var(--border-radius-md);
    color: var(--primary-color);
}

.contact-icon svg {
    width: 24px;
    height: 24px;
}

.contact-text h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.contact-text p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.contact-form {
    padding: 40px;
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 20px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-md);
    font-size: 1rem;
    color: var(--text-primary);
    transition: all var(--transition-fast);
    background: var(--bg-primary);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

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

/* ==========================================
   页脚
   ========================================== */
.footer {
    padding: 80px 0 30px;
    background: var(--bg-dark);
    color: white;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo {
    margin-bottom: 20px;
}

.footer-brand .logo-text {
    color: white;
    -webkit-text-fill-color: white;
}

.footer-desc {
    color: var(--text-light);
    line-height: 1.8;
}

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

.footer-col h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: white;
}

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

.footer-col li,
.footer-col a {
    color: var(--text-light);
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.footer-col a:hover {
    color: white;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    padding-top: 30px;
    color: var(--text-light);
    font-size: 0.875rem;
}

/* ==========================================
   响应式设计 - iOS 26 风格
   ========================================== */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content {
        order: 1;
    }

    .hero-visual {
        order: 0;
    }

    .hero-badge {
        margin: 0 auto 24px;
    }

    .hero-title {
        font-size: 3rem;
    }

    .hero-subtitle {
        margin: 0 auto 32px;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-buttons {
        justify-content: center;
    }

    .scroll-indicator {
        display: none;
    }

    .ai-brain {
        width: 300px;
        height: 300px;
    }

    .ring-1 { width: 150px; height: 150px; }
    .ring-2 { width: 210px; height: 210px; }
    .ring-3 { width: 270px; height: 270px; }

    .brain-core {
        width: 90px;
        height: 90px;
    }

    .brain-glow {
        width: 200px;
        height: 200px;
    }

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

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

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

    .about-content .section-title {
        text-align: center;
    }

    .about-content .section-tag {
        display: block;
        text-align: center;
    }

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

    .about-stats {
        justify-content: center;
    }

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

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

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

    .footer-bottom {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--glass-bg);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 24px;
        gap: 8px;
        box-shadow: var(--shadow-lg);
        transform: translateY(-150%);
        opacity: 0;
        transition: all var(--transition-normal);
        border-bottom: 1px solid var(--glass-border);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
    }

    .nav-toggle {
        display: flex;
    }

    .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 {
        padding: 100px 0 60px;
    }

    .hero-title {
        font-size: 2.25rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

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

    .stat-value {
        font-size: 1.5rem;
    }

    .ai-brain {
        width: 250px;
        height: 250px;
    }

    .ring-1 { width: 120px; height: 120px; }
    .ring-2 { width: 170px; height: 170px; }
    .ring-3 { width: 220px; height: 220px; }

    .brain-core {
        width: 70px;
        height: 70px;
    }

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

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

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

    .about-stats {
        flex-direction: column;
        gap: 20px;
    }

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

    .contact-form {
        padding: 30px 20px;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 12px;
    }

    .btn {
        width: 100%;
    }
}

/* 动画类 */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

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

/* 滚动进度条 */
.scroll-progress {
    position: fixed;
    top: 70px;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--gradient-primary);
    z-index: 999;
    transition: width 0.1s linear;
}