/**
 * NovaGold 官网样式
 * 展示型 + 线索收集网站
 */

/* === CSS 变量 === */
:root {
    /* 主题色 */
    --color-primary: #F59E0B;
    --color-primary-light: #FCD34D;
    --color-primary-dark: #B45309;
    --color-primary-glow: rgba(245, 158, 11, 0.4);

    /* 背景色 */
    --color-bg-primary: #0F172A;
    --color-bg-secondary: #1E293B;
    --color-bg-tertiary: #334155;
    --color-bg-card: rgba(30, 41, 59, 0.8);

    /* 文字色 */
    --color-text-primary: #F8FAFC;
    --color-text-secondary: #94A3B8;
    --color-text-muted: #64748B;

    /* 边框 */
    --color-border: rgba(148, 163, 184, 0.2);
    --color-border-light: rgba(148, 163, 184, 0.1);

    /* 字体 */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* 过渡 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
}

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

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

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

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

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

ul, ol {
    list-style: none;
}

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

/* === 按钮 === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #0F172A;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
    box-shadow: 0 0 20px var(--color-primary-glow);
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-bg-tertiary);
    border-color: var(--color-text-muted);
}

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

/* === 导航栏 === */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 72px;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(245, 158, 11, 0.1);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 60px;
    transition: all var(--transition-normal);
}

.header.scrolled {
    background: rgba(15, 23, 42, 0.95);
    height: 64px;
}

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

.header-logo-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    box-shadow: 0 0 20px rgba(245, 158, 11, 0.3);
}

.header-logo-text {
    font-size: 22px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.header-nav-item {
    color: var(--color-text-secondary);
    font-size: 14px;
    font-weight: 500;
    padding: 8px 0;
    position: relative;
    transition: color var(--transition-fast);
}

.header-nav-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-fast);
}

.header-nav-item:hover,
.header-nav-item.active {
    color: var(--color-primary);
}

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

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* === 语言选择器 === */
.lang-selector {
    position: relative;
}

.lang-selector-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    font-size: 13px;
    cursor: pointer;
    transition: all var(--transition-fast);
    /* 确保按钮可点击 */
    pointer-events: auto;
    user-select: none;
    -webkit-user-select: none;
}

.lang-selector-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-text-primary);
}

.lang-flag {
    font-size: 16px;
}

/* 国旗图片样式 */
.lang-flag-img {
    display: inline-block;
    width: 24px;
    height: 18px;
    object-fit: cover;
    border-radius: 2px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
    flex-shrink: 0;
}

.lang-arrow {
    font-size: 10px;
    transition: transform var(--transition-fast);
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 180px;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: 10000; /* 比 header 的 z-index 更高 */
}

.lang-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    font-size: 13px;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.lang-option:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
}

.lang-option.active {
    color: var(--color-primary);
    background: rgba(245, 158, 11, 0.1);
}

/* === 移动端菜单 === */
.mobile-menu-btn {
    display: none;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--color-text-primary);
}

.mobile-nav {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.98);
    backdrop-filter: blur(20px);
    padding: 24px;
    z-index: 999;
    flex-direction: column;
    gap: 8px;
}

.mobile-nav.show {
    display: flex;
}

.mobile-nav-item {
    display: block;
    padding: 16px;
    font-size: 16px;
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.mobile-nav-item:hover,
.mobile-nav-item.active {
    background: rgba(245, 158, 11, 0.1);
    color: var(--color-primary);
}

/* === Hero 区域 === */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 60px 80px;
    position: relative;
    z-index: 1;
}

.hero-content {
    text-align: center;
    max-width: 800px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    border-radius: var(--radius-full);
    font-size: 14px;
    color: var(--color-primary);
    margin-bottom: 24px;
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    color: var(--color-text-primary);
}

.hero-title-highlight {
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 40px;
}

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

/* === 统计数据 === */
.stats-section {
    padding: 60px;
    background: rgba(30, 41, 59, 0.3);
    position: relative;
    z-index: 1;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    max-width: 1000px;
    margin: 0 auto;
}

.stat-item {
    text-align: center;
    min-width: 0; /* 防止 grid 溢出 */
}

.stat-value {
    font-size: 42px;
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: 8px;
    /* 使用 tabular-nums 确保数字等宽，防止抖动 */
    font-variant-numeric: tabular-nums;
    font-feature-settings: "tnum";
    /* 固定高度防止跳动 */
    line-height: 1.2;
    min-height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Jackpot 风格数字 */
.stat-value.stat-jackpot {
    /* 文字阴影增加质感 */
    text-shadow: 0 0 20px rgba(245, 158, 11, 0.3);
}

.stat-label {
    font-size: 14px;
    color: var(--color-text-secondary);
}

/* === 通用 Section === */
.section {
    padding: 100px 60px;
    position: relative;
    z-index: 1;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--color-text-secondary);
}

/* === 特性网格 === */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-xl);
    padding: 32px 24px;
    text-align: center;
    transition: all var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-primary);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin: 0 auto 20px;
    box-shadow: 0 10px 30px rgba(245, 158, 11, 0.2);
}

.feature-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
}

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

/* === 星域网格 === */
.sectors-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.sector-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-xl);
    padding: 24px;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    /* 左右布局 */
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

.sector-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--sector-color, var(--color-primary));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.sector-card:hover {
    transform: translateY(-4px);
    border-color: var(--sector-color, var(--color-primary));
}

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

/* 左侧：图标+名称+类型 */
.sector-info {
    flex-shrink: 0;
    min-width: 90px;
}

.sector-icon {
    font-size: 40px;
    margin-bottom: 12px;
}

.sector-name {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.sector-type {
    font-size: 12px;
    color: var(--color-text-muted);
}

/* 右侧：描述文字 */
.sector-desc {
    flex: 1;
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    padding-top: 8px;
    /* 左侧边框装饰 */
    border-left: 2px solid var(--sector-color, var(--color-primary));
    padding-left: 16px;
    opacity: 0.9;
}

.sector-card:hover .sector-desc {
    opacity: 1;
    color: var(--color-text-primary);
}

/* === 合作伙伴 === */
.partners-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 32px;
    max-width: 1000px;
    margin: 0 auto;
}

.partner-logo {
    width: 120px;
    height: 60px;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    color: var(--color-text-muted);
    border: 1px solid var(--color-border-light);
}

/* === CTA 区域 === */
.cta-section {
    padding: 100px 60px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.cta-box {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1) 0%, rgba(245, 158, 11, 0.05) 100%);
    border: 1px solid rgba(245, 158, 11, 0.2);
    border-radius: var(--radius-xl);
    padding: 60px;
    max-width: 800px;
    margin: 0 auto;
}

.cta-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 16px;
}

.cta-subtitle {
    color: var(--color-text-secondary);
    margin-bottom: 32px;
}

/* === 页脚 === */
.footer {
    background: rgba(15, 23, 42, 0.9);
    border-top: 1px solid var(--color-border-light);
    padding: 60px;
    position: relative;
    z-index: 1;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

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

.footer-links {
    display: flex;
    gap: 80px;
}

.footer-links-group h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-links-group a {
    display: block;
    font-size: 14px;
    color: var(--color-text-muted);
    padding: 6px 0;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    max-width: 1200px;
    margin: 40px auto 0;
    padding-top: 24px;
    border-top: 1px solid var(--color-border-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: var(--color-text-muted);
}

.footer-badges {
    display: flex;
    gap: 16px;
}

/* === AI 客服按钮 (NovaLing 风格) === */
.ai-chat-btn {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 60px;
    height: 60px;
    /* 径向渐变背景 - 左上角发光效果 */
    background: radial-gradient(circle at 30% 30%, #FCD34D, #F59E0B);
    border-radius: 50%;
    /* 白色边框 */
    border: 3px solid #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    /* 全方向金色发光 */
    box-shadow: 0 0 20px rgba(245, 158, 11, 0.6);
    cursor: pointer;
    transition: all var(--transition-fast);
    z-index: 100;
}

.ai-chat-btn:hover {
    transform: scale(1.08);
    box-shadow: 0 0 30px rgba(245, 158, 11, 0.8);
}

/* NovaLing 表情 */
.ai-chat-face {
    font-size: 18px;
    line-height: 1;
    animation: blink 4s infinite;
    color: #fff;
    font-weight: bold;
    letter-spacing: -1px;
    white-space: nowrap;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

/* 眨眼动画 */
@keyframes blink {
    0%, 96%, 100% { transform: scaleY(1); }
    98% { transform: scaleY(0.1); }
}

.ai-chat-tooltip {
    position: absolute;
    bottom: 70px;
    right: 0;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    font-size: 13px;
    color: var(--color-text-secondary);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-fast);
}

.ai-chat-btn:hover .ai-chat-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* === 响应式 === */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .sectors-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .sector-card {
        padding: 20px;
    }
    
    .sector-desc {
        font-size: 13px;
    }
    
    .header {
        padding: 0 24px;
    }
    
    .section, .hero, .cta-section, .footer {
        padding-left: 24px;
        padding-right: 24px;
    }
}

@media (max-width: 768px) {
    /* === Header 移动端布局 === */
    .header {
        padding: 0 16px;
        height: 64px;
    }
    
    .header-nav {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .header-logo-icon {
        width: 36px;
        height: 36px;
        font-size: 18px;
    }
    
    .header-logo-text {
        font-size: 18px;
    }
    
    .header-actions {
        gap: 8px;
    }
    
    /* 移动端隐藏 header 中的咨询按钮 */
    .header-actions > .btn {
        display: none;
    }
    
    /* === 语言选择器移动端样式 === */
    .lang-selector-btn {
        padding: 8px 10px;
        gap: 6px;
        min-width: auto;
        /* 确保触摸友好 */
        min-height: 44px;
        touch-action: manipulation;
    }
    
    /* 移动端只显示国旗+箭头，隐藏语言名称 */
    .lang-selector-btn .lang-name {
        display: none;
    }
    
    .lang-flag-img {
        width: 24px;
        height: 18px;
    }
    
    .lang-arrow {
        font-size: 8px;
    }
    
    /* 下拉菜单移动端全宽样式 */
    .lang-dropdown {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        min-width: 100vw;
        max-height: calc(100vh - 64px);
        overflow-y: auto;
        border-radius: 0;
        border-left: none;
        border-right: none;
        /* 确保在最上层 */
        z-index: 10001;
    }
    
    /* 增大触摸区域 */
    .lang-option {
        padding: 16px 20px;
        min-height: 52px;
        font-size: 15px;
        gap: 12px;
        /* 防止快速点击问题 */
        touch-action: manipulation;
    }
    
    .lang-option .lang-flag-img {
        width: 28px;
        height: 21px;
    }
    
    /* 显示语言名称在选项中 */
    .lang-option .lang-name {
        display: inline;
    }
    
    /* === 移动端菜单优化 === */
    .mobile-nav {
        top: 64px;
        padding: 16px;
    }
    
    .mobile-nav-item {
        padding: 14px 16px;
        font-size: 15px;
        min-height: 48px;
        display: flex;
        align-items: center;
    }
    
    /* 移动菜单中的语言选择器 */
    .mobile-nav .lang-selector {
        margin-top: 8px;
    }
    
    .mobile-nav .lang-selector-btn {
        width: 100%;
        justify-content: flex-start;
        padding: 14px 16px;
        background: rgba(245, 158, 11, 0.1);
        border-color: rgba(245, 158, 11, 0.3);
    }
    
    /* 移动菜单中显示语言名称 */
    .mobile-nav .lang-selector-btn .lang-name {
        display: inline;
    }
    
    .mobile-nav .lang-dropdown {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        min-width: 100%;
        border-radius: var(--radius-md);
    }
    
    /* === Hero 移动端 === */
    .hero {
        padding: 100px 20px 60px;
        min-height: auto;
    }
    
    .hero-badge {
        font-size: 12px;
        padding: 6px 12px;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 15px;
        line-height: 1.7;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }
    
    .hero-actions .btn {
        width: 100%;
        max-width: 280px;
    }
    
    /* === 统计数据移动端 === */
    .stats-section {
        padding: 40px 16px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .stat-value {
        font-size: 28px;
        min-height: 40px;
    }
    
    .stat-label {
        font-size: 12px;
    }
    
    /* === Section 移动端 === */
    .section {
        padding: 60px 16px;
    }
    
    .section-header {
        margin-bottom: 40px;
    }
    
    .section-title {
        font-size: 26px;
    }
    
    .section-subtitle {
        font-size: 14px;
    }
    
    /* === 特性卡片移动端 === */
    .features-grid, .sectors-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .feature-card {
        padding: 24px 20px;
    }
    
    .feature-icon {
        width: 56px;
        height: 56px;
        font-size: 24px;
    }
    
    .feature-title {
        font-size: 16px;
    }
    
    .feature-desc {
        font-size: 13px;
    }
    
    /* === 星域卡片移动端 - 单列上下布局 === */
    .sectors-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .sector-card {
        padding: 20px;
        flex-direction: column;
        gap: 16px;
    }
    
    .sector-info {
        display: flex;
        align-items: center;
        gap: 16px;
        min-width: auto;
        width: 100%;
    }
    
    .sector-icon {
        font-size: 36px;
        margin-bottom: 0;
    }
    
    .sector-info-text {
        flex: 1;
    }
    
    .sector-name {
        font-size: 16px;
    }
    
    .sector-type {
        font-size: 12px;
    }
    
    .sector-desc {
        border-left: none;
        border-top: 1px solid var(--color-border-light);
        padding-left: 0;
        padding-top: 12px;
        font-size: 13px;
    }
    
    /* === 合作伙伴移动端 === */
    .partners-grid {
        gap: 16px;
    }
    
    .partner-logo {
        width: 100px;
        height: 50px;
        font-size: 11px;
    }
    
    /* === CTA 移动端 === */
    .cta-section {
        padding: 60px 16px;
    }
    
    .cta-box {
        padding: 40px 24px;
    }
    
    .cta-title {
        font-size: 22px;
    }
    
    .cta-subtitle {
        font-size: 14px;
    }
    
    /* === Footer 移动端 === */
    .footer {
        padding: 40px 16px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 32px;
    }
    
    .footer-brand {
        max-width: 100%;
        text-align: center;
    }
    
    .footer-logo {
        justify-content: center;
    }
    
    .footer-links {
        flex-wrap: wrap;
        gap: 32px;
        justify-content: center;
    }
    
    .footer-links-group {
        text-align: center;
        min-width: 120px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
    
    .footer-badges {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    /* === AI 按钮移动端 === */
    .ai-chat-btn {
        bottom: 20px;
        right: 20px;
        width: 54px;
        height: 54px;
    }
    
    .ai-chat-face {
        font-size: 16px;
    }
    
    .ai-chat-tooltip {
        display: none;
    }
}

/* === 超小屏幕 (iPhone SE 等) === */
@media (max-width: 375px) {
    .header {
        padding: 0 12px;
    }
    
    .header-logo-text {
        font-size: 16px;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .stat-value {
        font-size: 24px;
    }
    
    .sector-card {
        padding: 16px;
    }
    
    .sector-icon {
        font-size: 32px;
    }
    
    .sector-name {
        font-size: 15px;
    }
    
    .sector-desc {
        font-size: 12px;
    }
}