/* 智连AI 产品首页样式表 - 浅色明亮版本 */

/* ===== CSS变量定义 ===== */
:root {
    /* 背景色 - 浅色主题 */
    --bg-primary: #FFFFFF;
    --bg-secondary: #FAFBFC;
    --bg-tertiary: #F1F5F9;
    --bg-soft: #F8FAFC;

    /* 主色调 - 清新蓝 */
    --primary: #0066FF;
    --primary-light: #3385FF;
    --primary-dark: #0052CC;
    --primary-glow: rgba(0, 102, 255, 0.15);

    /* 强调色 - 活力青 */
    --accent: #00A3A3;
    --accent-light: #00C4C4;
    --accent-glow: rgba(0, 163, 163, 0.15);

    /* 文字颜色 */
    --text-primary: #1A1D21;
    --text-secondary: #4A5568;
    --text-light: #718096;
    --text-white: #FFFFFF;
    --text-muted: #A0AEC0;

    /* 边框与分割 */
    --border: #E2E8F0;
    --border-light: rgba(0, 0, 0, 0.06);

    /* 阴影 */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.12);
    --shadow-glow: 0 0 40px rgba(0, 102, 255, 0.15);

    /* 间距 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
    --spacing-4xl: 96px;

    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* 容器宽度 */
    --container-max: 1200px;
    --container-padding: 24px;

    /* 过渡 */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ===== 登录弹窗样式 ===== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-container {
    background: white;
    border-radius: 16px;
    width: 100%;
    max-width: 420px;
    padding: 40px;
    position: relative;
    transform: translateY(20px) scale(0.95);
    transition: all 0.3s ease;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
    margin: 20px;
}

.modal-overlay.active .modal-container {
    transform: translateY(0) scale(1);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 32px;
    height: 32px;
    border: none;
    background: var(--bg-tertiary);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.modal-close:hover {
    background: var(--bg-secondary);
    transform: rotate(90deg);
}

.modal-close svg {
    width: 16px;
    height: 16px;
    color: var(--text-secondary);
}

.modal-header {
    text-align: center;
    margin-bottom: 32px;
}

.modal-logo {
    width: 60px;
    height: 60px;
    margin: 0 auto 16px;
    color: var(--primary);
}

.modal-logo svg {
    width: 100%;
    height: 100%;
}

.modal-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.modal-subtitle {
    font-size: 14px;
    color: var(--text-light);
}

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

.modal-form label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.modal-form input[type="text"],
.modal-form input[type="password"] {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 15px;
    transition: all 0.2s ease;
    background: var(--bg-secondary);
}

.modal-form input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
    background: white;
}

.modal-form input::placeholder {
    color: var(--text-muted);
}

.form-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    font-size: 14px;
}

.remember-me {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    color: var(--text-secondary);
}

.remember-me input {
    width: 16px;
    height: 16px;
    accent-color: var(--primary);
}

.forgot-password {
    color: var(--primary);
    font-weight: 500;
}

.forgot-password:hover {
    text-decoration: underline;
}

.modal-form .btn-block {
    width: 100%;
    padding: 14px;
    font-size: 16px;
    font-weight: 600;
}

.modal-footer {
    text-align: center;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    font-size: 14px;
    color: var(--text-secondary);
}

.register-link {
    color: var(--primary);
    font-weight: 500;
}

.register-link:hover {
    text-decoration: underline;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    overflow-x: hidden;
}

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

ul, ol {
    list-style: none;
}

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

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

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

/* ===== 工具类 ===== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* ===== 按钮样式 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    box-shadow: 0 4px 14px rgba(0, 102, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 102, 255, 0.4);
}

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

.btn-secondary:hover {
    background: var(--primary);
    color: white;
}

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

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

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

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

.btn-lg {
    padding: 16px 32px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
}

.btn-arrow {
    width: 18px;
    height: 18px;
    margin-left: var(--spacing-xs);
    transition: transform var(--transition-base);
}

.btn-primary:hover .btn-arrow {
    transform: translateX(4px);
}

.btn-play {
    width: 18px;
    height: 18px;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
}

.logo-icon {
    width: 36px;
    height: 36px;
    color: var(--primary);
    transition: transform 0.3s ease;
}

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

.logo-text {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-link {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width var(--transition-base);
}

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

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-sm);
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-base);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: white;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    transition: all var(--transition-base);
    z-index: 999;
}

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

.mobile-link {
    display: block;
    padding: var(--spacing-md) 0;
    font-size: 16px;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border);
}

.mobile-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

/* ===== 首屏Hero区域 ===== */
.hero {
    position: relative;
    min-height: 100vh;
    padding-top: 72px;
    background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 50%, #F1F5F9 100%);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-glow {
    position: absolute;
    top: -30%;
    left: -10%;
    width: 60%;
    height: 120%;
    background: radial-gradient(ellipse at center, rgba(0, 102, 255, 0.08) 0%, transparent 60%);
    animation: glowPulse 8s ease-in-out infinite;
}

@keyframes glowPulse {
    0%, 100% {
        opacity: 0.6;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
}

.hero-decor {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
    pointer-events: none;
}

.hero-decor-circle {
    position: absolute;
    border-radius: 50%;
    border: 1px solid rgba(0, 102, 255, 0.08);
}

.hero-decor-circle-1 {
    width: 400px;
    height: 400px;
    top: 10%;
    right: -100px;
    animation: float 20s ease-in-out infinite;
}

.hero-decor-circle-2 {
    width: 300px;
    height: 300px;
    bottom: 20%;
    left: -80px;
    animation: float 25s ease-in-out infinite reverse;
}

.hero-decor-circle-3 {
    width: 200px;
    height: 200px;
    top: 50%;
    left: 30%;
    animation: float 15s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(10deg);
    }
}

.hero-container {
    position: relative;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--spacing-4xl) var(--container-padding);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    min-height: calc(100vh - 72px);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 8px 16px;
    background: rgba(0, 102, 255, 0.08);
    border: 1px solid rgba(0, 102, 255, 0.15);
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 500;
    color: var(--primary);
    margin-bottom: var(--spacing-lg);
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    animation: badgePulse 2s ease-in-out infinite;
}

@keyframes badgePulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.5;
        transform: scale(1.2);
    }
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.15;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 18px;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    max-width: 540px;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border);
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-number {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
}

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

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border);
}

.hero-visual {
    position: relative;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* AI球体 - 浅色版本 */
.ai-orb {
    position: relative;
    width: 320px;
    height: 320px;
}

.orb-core {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 120px;
    background: radial-gradient(circle at 30% 30%, #FFFFFF, var(--primary-light), var(--primary));
    border-radius: 50%;
    box-shadow:
        0 0 60px rgba(0, 102, 255, 0.3),
        0 0 100px rgba(0, 102, 255, 0.15),
        inset 0 -10px 30px rgba(0, 0, 0, 0.1);
}

.orb-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 1px solid rgba(0, 102, 255, 0.15);
    border-radius: 50%;
    animation: orbRotate 20s linear infinite;
}

.orb-ring-1 {
    width: 160px;
    height: 160px;
    animation-duration: 15s;
}

.orb-ring-2 {
    width: 220px;
    height: 220px;
    animation-duration: 25s;
    animation-direction: reverse;
}

.orb-ring-3 {
    width: 280px;
    height: 280px;
    animation-duration: 35s;
}

@keyframes orbRotate {
    from {
        transform: translate(-50%, -50%) rotate(0deg);
    }
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

.orb-pulse {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 320px;
    height: 320px;
    background: radial-gradient(circle, rgba(0, 102, 255, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    animation: orbPulse 3s ease-in-out infinite;
}

@keyframes orbPulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(0.9);
        opacity: 0.6;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.1);
        opacity: 1;
    }
}

.floating-cards {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.float-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 14px 18px;
    background: white;
    border-radius: var(--radius-md);
    font-size: 13px;
    color: var(--text-primary);
    animation: floatCard 6s ease-in-out infinite;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
}

.float-card svg {
    width: 20px;
    height: 20px;
    color: var(--primary);
}

.float-card-1 {
    top: 15%;
    right: 0;
    animation-delay: 0s;
}

.float-card-2 {
    top: 45%;
    left: 0;
    animation-delay: 2s;
}

.float-card-3 {
    bottom: 20%;
    right: 5%;
    animation-delay: 4s;
}

@keyframes floatCard {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.hero-scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-muted);
    font-size: 12px;
    animation: scrollBounce 2s ease-in-out infinite;
}

.scroll-mouse {
    width: 24px;
    height: 40px;
    border: 2px solid var(--text-muted);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
}

.scroll-wheel {
    width: 4px;
    height: 8px;
    background: var(--text-muted);
    border-radius: 2px;
    animation: scrollWheel 2s ease-in-out infinite;
}

@keyframes scrollBounce {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(8px);
    }
}

@keyframes scrollWheel {
    0%, 100% {
        opacity: 1;
        transform: translateY(0);
    }
    50% {
        opacity: 0.3;
        transform: translateY(6px);
    }
}

/* ===== 信任背书区 ===== */
.partners {
    padding: var(--spacing-2xl) 0;
    background: white;
    border-bottom: 1px solid var(--border);
}

.partners-label {
    text-align: center;
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: var(--spacing-xl);
}

.partners-grid {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-3xl);
    flex-wrap: wrap;
}

.partner-logo {
    opacity: 0.35;
    transition: opacity var(--transition-base);
}

.partner-logo:hover {
    opacity: 0.6;
}

.partner-logo svg {
    height: 32px;
    width: auto;
}

/* ===== 通用区块样式 ===== */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-3xl);
}

.section-tag {
    display: inline-block;
    padding: 6px 14px;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.08), rgba(0, 163, 163, 0.08));
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: var(--spacing-md);
}

.section-title {
    font-size: 40px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.section-desc {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== 核心价值区 ===== */
.value-section {
    padding: var(--spacing-4xl) 0;
    background: var(--bg-secondary);
}

.value-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.value-card {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border);
}

.value-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.value-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.value-card:hover::before {
    opacity: 1;
}

.value-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.1), rgba(0, 163, 163, 0.1));
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.value-icon svg {
    width: 32px;
    height: 32px;
    color: var(--primary);
}

.value-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.value-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.value-metric {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-sm);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border);
}

.metric-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
}

.metric-label {
    font-size: 13px;
    color: var(--text-muted);
}

/* ===== 功能深挖区 ===== */
.features-section {
    padding: var(--spacing-4xl) 0;
    background: white;
}

.bento-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: auto auto;
    gap: var(--spacing-lg);
}

.bento-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-base);
    overflow: hidden;
    border: 1px solid var(--border);
}

.bento-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.bento-main {
    grid-column: span 2;
    grid-row: span 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    background: linear-gradient(135deg, #FAFBFC 0%, #F1F5F9 100%);
    border: 1px solid var(--border);
}

.bento-content {
    position: relative;
    z-index: 2;
}

.bento-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 102, 255, 0.1);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

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

.bento-main .bento-icon {
    background: var(--primary);
}

.bento-main .bento-icon svg {
    color: white;
}

.bento-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.bento-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.bento-main .bento-desc {
    color: var(--text-secondary);
}

.platform-icons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.platform-icon {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-primary);
    transition: all var(--transition-base);
}

.platform-icon:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.platform-icon svg {
    width: 18px;
    height: 18px;
}

.bento-visual {
    position: relative;
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.connection-animation {
    position: relative;
    width: 200px;
    height: 200px;
}

.node {
    position: absolute;
    width: 20px;
    height: 20px;
    background: var(--primary-light);
    border-radius: 50%;
    box-shadow: 0 0 20px var(--primary-glow);
}

.node-center {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 30px;
    height: 30px;
    background: white;
    border: 3px solid var(--primary);
}

.node-1 {
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    animation: nodePulse 2s ease-in-out infinite;
}

.node-2 {
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    animation: nodePulse 2s ease-in-out infinite 0.5s;
}

.node-3 {
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    animation: nodePulse 2s ease-in-out infinite 1s;
}

.node-4 {
    top: 50%;
    left: 0;
    transform: translateY(-50%);
    animation: nodePulse 2s ease-in-out infinite 1.5s;
}

@keyframes nodePulse {
    0%, 100% {
        transform: translateX(-50%) scale(1);
    }
    50% {
        transform: translateX(-50%) scale(1.3);
    }
}

.node-2, .node-4 {
    animation-name: nodePulseSide;
}

@keyframes nodePulseSide {
    0%, 100% {
        transform: translateY(-50%) scale(1);
    }
    50% {
        transform: translateY(-50%) scale(1.3);
    }
}

.line {
    position: absolute;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    opacity: 0.3;
}

.line-1 {
    top: 10px;
    left: 50%;
    width: 2px;
    height: 80px;
    transform: translateX(-50%);
    animation: lineFlow 2s linear infinite;
}

.line-2 {
    top: 50%;
    right: 10px;
    width: 80px;
    height: 2px;
    transform: translateY(-50%);
    animation: lineFlow 2s linear infinite 0.5s;
}

.line-3 {
    bottom: 10px;
    left: 50%;
    width: 2px;
    height: 80px;
    transform: translateX(-50%);
    animation: lineFlow 2s linear infinite 1s;
}

.line-4 {
    top: 50%;
    left: 10px;
    width: 80px;
    height: 2px;
    transform: translateY(-50%);
    animation: lineFlow 2s linear infinite 1.5s;
}

@keyframes lineFlow {
    0% {
        opacity: 0.15;
    }
    50%, 100% {
        opacity: 0.5;
    }
}

.knowledge-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.flow-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: white;
    border-radius: var(--radius-md);
    font-size: 13px;
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.flow-item svg {
    width: 28px;
    height: 28px;
    color: var(--primary);
}

.flow-arrow {
    width: 30px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    position: relative;
}

.flow-arrow::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    border: 4px solid transparent;
    border-left-color: var(--accent);
}

/* ===== 应用场景区 ===== */
.scenarios-section {
    padding: var(--spacing-4xl) 0;
    background: var(--bg-secondary);
}

.scenarios-tabs {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.tab-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 14px 24px;
    background: white;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 600;
    color: var(--text-secondary);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border: 1px solid var(--border);
}

.tab-btn svg {
    width: 20px;
    height: 20px;
}

.tab-btn:hover {
    color: var(--primary);
    box-shadow: var(--shadow-md);
}

.tab-btn.active {
    background: var(--primary);
    color: white;
    box-shadow: var(--shadow-glow);
    border-color: var(--primary);
}

.tab-panel {
    display: none;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    animation: fadeIn 0.5s ease;
}

.tab-panel.active {
    display: grid;
}

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

.scenario-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.scenario-desc {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-xl);
}

.scenario-features {
    margin-bottom: var(--spacing-xl);
}

.scenario-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    font-size: 15px;
    color: var(--text-primary);
}

.scenario-features svg {
    width: 20px;
    height: 20px;
    color: var(--accent);
    flex-shrink: 0;
}

.scenario-demo {
    display: flex;
    justify-content: center;
}

.chat-window {
    width: 100%;
    max-width: 400px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    border: 1px solid var(--border);
}

.chat-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
}

.chat-avatar svg {
    width: 40px;
    height: 40px;
}

.chat-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.online-dot {
    width: 8px;
    height: 8px;
    background: #10B981;
    border-radius: 50%;
    animation: onlinePulse 2s ease-in-out infinite;
}

@keyframes onlinePulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.chat-messages {
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    min-height: 300px;
    max-height: 400px;
    overflow-y: auto;
}

.message {
    display: flex;
    max-width: 85%;
}

.message-ai {
    align-self: flex-start;
}

.message-user {
    align-self: flex-end;
}

.message-content {
    padding: var(--spacing-md);
    padding-right: 24px;
    border-radius: var(--radius-md);
    font-size: 14px;
    line-height: 1.6;
    word-wrap: break-word;
    overflow-wrap: break-word;
    max-width: 100%;
}

.message-ai .message-content {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-bottom-left-radius: 4px;
}

.message-user .message-content {
    background: var(--primary);
    color: white;
    border-bottom-right-radius: 4px;
}

.typing-effect {
    overflow: visible;
    white-space: normal;
    animation: none;
}

@keyframes typing {
    from {
        width: 0;
    }
    to {
        width: 100%;
    }
}

/* ===== 数据安全区 ===== */
.security-section {
    padding: var(--spacing-4xl) 0;
    background: white;
}

.security-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.security-card {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    border: 1px solid var(--border);
}

.security-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.security-icon {
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    border-radius: 50%;
    margin: 0 auto var(--spacing-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
}

.security-icon svg {
    width: 36px;
    height: 36px;
    color: var(--primary);
}

.security-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.security-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.security-badges {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border);
}

.badge-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-muted);
    font-size: 14px;
}

.badge-item svg {
    width: 24px;
    height: 24px;
    color: var(--primary);
}

/* ===== CTA区域 ===== */
.cta-section {
    position: relative;
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(135deg, #FAFBFC 0%, #F1F5F9 100%);
    overflow: hidden;
}

.cta-bg {
    position: absolute;
    inset: 0;
}

.cta-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 400px;
    background: radial-gradient(ellipse, rgba(0, 102, 255, 0.08) 0%, transparent 60%);
    animation: ctaGlow 4s ease-in-out infinite;
}

@keyframes ctaGlow {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.6;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.1);
        opacity: 1;
    }
}

.cta-section .container {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.cta-content {
    color: var(--text-primary);
}

.cta-title {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.cta-desc {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.cta-actions {
    display: flex;
    gap: var(--spacing-md);
}

.contact-form {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border);
}

.form-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    width: 100%;
}

.form-input {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 15px;
    transition: all var(--transition-base);
    background: var(--bg-secondary);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
    background: white;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--text-primary);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1.5fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-brand .logo {
    margin-bottom: var(--spacing-md);
}

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

.footer-desc {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: var(--spacing-lg);
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--text-muted);
    transition: all var(--transition-base);
}

.social-link:hover {
    background: var(--primary);
    color: white;
}

.social-link svg {
    width: 20px;
    height: 20px;
}

.footer-title {
    font-size: 15px;
    font-weight: 700;
    color: white;
    margin-bottom: var(--spacing-lg);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-links a {
    font-size: 14px;
    color: var(--text-muted);
    transition: color var(--transition-base);
}

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

.footer-contact p {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
}

.footer-contact svg {
    width: 18px;
    height: 18px;
    color: var(--text-muted);
    flex-shrink: 0;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    font-size: 13px;
    color: var(--text-muted);
}

.footer-legal {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-legal a {
    font-size: 13px;
    color: var(--text-muted);
}

.footer-legal a:hover {
    color: var(--text-light);
}

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

    .hero-title {
        font-size: 42px;
    }

    .hero-subtitle {
        margin: 0 auto var(--spacing-xl);
    }

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

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

    .hero-visual {
        display: none;
    }

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

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

    .bento-main {
        grid-column: span 1;
        grid-row: span 1;
        grid-template-columns: 1fr;
    }

    .bento-visual {
        display: none;
    }

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

    .cta-section .container {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 768px) {
    .nav-links,
    .nav-actions {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .mobile-menu {
        display: block;
    }

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

    .hero-actions {
        flex-direction: column;
    }

    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .stat-divider {
        display: none;
    }

    .section-title {
        font-size: 28px;
    }

    .scenarios-tabs {
        flex-direction: column;
    }

    .tab-panel {
        grid-template-columns: 1fr;
    }

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

    .security-badges {
        flex-direction: column;
        align-items: center;
    }

    .cta-title {
        font-size: 28px;
    }

    .cta-actions {
        flex-direction: column;
    }

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

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
}