/* ====================
   全局样式
   ==================== */
:root {
    --primary-color: #1880FF;
    --primary-dark: #0066E6;
    --primary-light: #E6F5FF;
    --text-primary: #040F42;
    --text-secondary: #606787;
    --text-light: #8B92A8;
    --bg-white: #FFFFFF;
    --bg-gray: #F7F8FA;
    --border-color: #E5E7EB;
    --success-color: #10B981;
    --gradient-primary: linear-gradient(135deg, #1880FF 0%, #0066E6 100%);
    --gradient-hero: linear-gradient(135deg, #E6F5FF 0%, #FFFFFF 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ====================
   导航栏
   ==================== */
.navbar {
    position: fixed;
    top: 16px; /* Space from top */
    left: 0;
    right: 0;
    background: transparent; /* Fully transparent */
    box-shadow: none !important; /* Never show global bars */
    z-index: 1000;
    transition: var(--transition);
}
.navbar .container {
    max-width: 100%;
    width: 100%;
    padding: 0 24px; /* keep safe margin to viewport edges */
}


.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between; /* Push items apart */
    height: 84px; /* Taller for prominence */
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
}

.logo-text {
    font-size: 22px; /* Larger logo text */
    font-weight: 700;
    color: var(--text-primary);
}

/* 移除顶部品牌后的 CN 标签 */
.logo-text::after {
    content: '';
    display: none;
}

.logo img,
.footer-logo img {
    width: 44px; /* Larger logo */
    height: 44px; /* Larger logo */
    border-radius: 10px;
    object-fit: contain;
}

.logo img {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.logo:hover img {
    transform: scale(1.05);
    box-shadow: 0 0 0 4px rgba(24, 128, 255, 0.1);
}


.logo svg {
    transition: transform 0.3s ease;
}

.logo:hover svg {
    transform: rotate(360deg);
}

.nav-menu {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 44px; /* larger spacing */
    padding: 16px 64px; /* larger capsule */
    border-radius: 999px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 1); /* solid white */
    border: 2px solid rgba(226, 232, 240, 0.9);
    box-shadow: none; /* no drop shadow */
    backdrop-filter: blur(18px);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 18px; /* Bigger for prominence */
    font-weight: 600;
    padding: 10px 0;
    position: relative;
    transition: var(--transition);
}

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

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

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px; /* make right capsule lower to align with middle */
    border-radius: 999px;
    background: rgba(255, 255, 255, 1);
    border: 2px solid rgba(226, 232, 240, 0.9);
    box-shadow: none; /* Removed shadow */
    backdrop-filter: blur(18px);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-primary);
    cursor: pointer;
}

/* ====================
   按钮样式
   ==================== */
.btn-primary,
.btn-secondary,
.btn-white,
.btn-text,
.btn-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 22px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 12px rgba(24, 128, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(24, 128, 255, 0.4);
}

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

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

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

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

.btn-text {
    background: transparent;
    color: var(--text-primary);
    padding: 8px 16px;
}

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

.btn-link {
    background: transparent;
    color: var(--primary-color);
    padding: 0;
    font-weight: 600;
}

.btn-link:hover {
    gap: 12px;
}

.btn-large {
    padding: 16px 32px;
    font-size: 18px;
}

/* ====================
   Hero Section
   ==================== */
.hero {
    position: relative;
    min-height: 720px;
    display: flex;
    align-items: center;
    padding-top: 160px; /* Adjusted for taller navbar */
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-hero);
    z-index: -1;
}

.gradient-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(24, 128, 255, 0.1) 0%, transparent 50%);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: white;
    border-radius: 24px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 24px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 50%;
}

.badge-text {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.badge-label {
    padding: 2px 8px;
    background: var(--primary-light);
    color: var(--primary-color);
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

/* Hero 徽标右侧标签改为绿色底白字 */
.hero-badge .badge-label {
    background: #10B981;
    color: #ffffff;
}


.hero-title {
    font-size: 64px;
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: 24px;
}

/* 闪烁效果样式 */
.shine-text-blue {
    background: linear-gradient(90deg,#1e40af,#3b82f6,#60a5fa 40%,#fffffff2,#60a5fa 60%,#3b82f6,#1e40af);
    background-size: 200% 100%;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: sweep-shine 4s linear infinite;
    font-weight: 700;
}

@keyframes sweep-shine {
    0% {
        background-position: 200% center;
    }
    100% {
        background-position: -200% center;
    }
}

/* 打字机效果容器（两行固定高度，防抖动） */
.typewriter-container {
    display: inline-block;
    font-size: 32px;
    line-height: 1.3;
    width: 100%;               /* 自适应到父容器宽度 */
    max-width: none;           /* 允许向右延伸到父容器边界 */
    min-height: 1.3em;         /* 至少一行高度 */
    max-height: calc(1.3em * 2); /* 最多两行高度 */
    overflow: hidden;          /* 超出两行隐藏 */
    vertical-align: bottom;
    text-align: left;
    box-sizing: content-box;
}

/* 打字机效果样式（允许换行） */
.typewriter-text {
    color: #000000;
    border-right: 3px solid #000000;
    padding-right: 5px;
    animation: blink-caret 0.75s step-end infinite;
    white-space: normal;       /* 允许自动换行到两行 */
    word-break: break-word;
}


@keyframes blink-caret {
    from, to {
        border-color: transparent;
    }
    50% {
        border-color: #000000;
    }
}

.hero-description {
    font-size: 20px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

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

.hero-actions .btn-primary,
.hero-actions .btn-secondary {
    padding: 14px 32px;
    font-size: 16px;
}

.nav-actions .btn-primary,
.nav-actions .btn-secondary {
    padding: 10px 28px; /* match nav menu item vertical rhythm */
    font-size: 16px;
    font-family: inherit; /* 使用与 video-dropdown-btn 相同的字体 */
    font-weight: 500; /* 确保字重一致 */
    box-shadow: none; /* keep island clean */
}

.nav-actions .btn-text {
    font-size: 14px;
}

.hero-image-wrapper {
    position: relative;
    width: 100%;
    height: 500px;
    background: linear-gradient(135deg, rgba(24, 128, 255, 0.1) 0%, rgba(24, 128, 255, 0.05) 100%);
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-showcase {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    width: 100%;
    max-width: 520px;
    padding: 32px 32px 28px;
}

.hero-feature-badges {
    justify-content: center;
    gap: 24px;
    margin-bottom: 0;
}

.hero-feature-badges .feature-badge span {
    font-size: 14px;
}

.hero-platforms-strip {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.hero-platforms-label {
    font-size: 12px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--primary-color);
}

.hero-platform-icons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
}

.hero-platform-icons img {
    width: 40px;
    height: 40px;
    border-radius: 999px;
    background: #fff;
    padding: 6px;
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.08);
}


.floating-card {
    position: absolute;
    background: white;
    padding: 20px 24px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: 12px;
    animation: float 3s ease-in-out infinite;
}

.floating-card i {
    font-size: 24px;
    color: var(--primary-color);
}

.floating-card span {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.card-1 {
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.card-2 {
    top: 50%;
    right: 10%;
    animation-delay: 1s;
}

.card-3 {
    bottom: 20%;
    left: 20%;
    animation-delay: 2s;
}

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


/* ====================
   支持平台 Section
   ==================== */
.platforms {
    padding: 64px 0 40px;
    background: var(--bg-gray);
}

.platforms-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 48px;
    flex-wrap: wrap;
}

.platforms-label {
    font-size: 14px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.platforms-text {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 420px;
}

.platforms-logos {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px 40px;
    align-items: center;
}

.platform-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.platform-logo img {
    width: 72px;
    height: 72px;
    object-fit: contain;
    padding: 10px;
    border-radius: 16px;
    background: #fff;
    box-shadow: var(--shadow-sm);
}

.platform-logo span {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ====================
   核心功能 Section
   ==================== */
.core-features {
    padding: 96px 0;
    background: var(--bg-white);
}

.core-features-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 32px;
}

.core-feature-card {
    background: #fff;
    border-radius: 18px;
    box-shadow: var(--shadow-md);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.core-feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.core-feature-image img {
    width: 100%;
    display: block;
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
}

.core-feature-body {
    padding: 20px 20px 22px;
}

.core-feature-icon {
    font-size: 24px;
    margin-bottom: 8px;
}

.core-feature-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.core-feature-text {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-secondary);
}

/* ====================
   AI Features Section
   ==================== */
.ai-features {
    padding: 96px 0;
    background: var(--bg-white);
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.hero-image .ai-demo-visual {
    width: 100%;
    max-width: none;
    margin: 0;
}

.hero-chat-carousel .chat-conversation {
    display: none;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.hero-chat-carousel .chat-conversation.active {
    display: block;
    opacity: 1;
}

.section-title {
    font-size: 40px;
    font-weight: 700;
    line-height: 1.4;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.section-description {
    font-size: 20px;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto;
}

.features-badges {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-bottom: 48px;
}

.ai-features .ai-demo {
    display: none;
}


.feature-badge {
    display: flex;
    align-items: center;
    gap: 8px;
}

.feature-badge i {
    font-size: 24px;
    color: var(--primary-color);
}

.feature-badge span {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.ai-demo-visual {
    max-width: 600px;
    margin: 0 auto;
}

.chat-interface {
    background: white;
    border-radius: 16px;
    padding: 24px;
    box-shadow: var(--shadow-md);
    width: 100%;
    min-width: 450px;
    box-sizing: border-box;
}

.hero-chat-carousel {
    height: 260px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    overflow: hidden;
}

.chat-message {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
    animation: slideIn 0.5s ease;
    width: 100%;
}

.chat-message.user {
    flex-direction: row-reverse;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.message-avatar i {
    color: var(--primary-color);
}

.message-content {
    background: var(--bg-gray);
    padding: 12px 16px;
    border-radius: 12px;
    max-width: 70%;
    line-height: 1.5;
}

.chat-message.user .message-content {
    background: var(--primary-color);
    color: white;
}

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

/* ====================
   Product Features Section
   ==================== */
.product-features {
    padding: 96px 0;
    background: var(--bg-white);
}

.feature-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    margin-bottom: 96px;
}

.feature-row.reverse {
    direction: rtl;
}

.feature-row.reverse > * {
    direction: ltr;
}

.feature-label {
    color: var(--primary-color);
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 16px;
}

.feature-title {
    font-size: 40px;
    font-weight: 700;
    line-height: 1.4;
    color: var(--text-primary);
    margin-bottom: 24px;
}

.feature-description {
    font-size: 18px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.feature-point {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}

.feature-point i {
    color: var(--success-color);
    font-size: 20px;
}

.channels-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

/* 核心功能区域布局：左文字右图片 / 右文字左图片 */
.core-features-layout {
    margin-top: 56px;
    display: flex;
    flex-direction: column;
    gap: 80px;
}

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

.core-features .feature-row {
    margin-bottom: 0;
}

.channel-item {
    background: white;
    padding: 24px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    transition: var(--transition);
}

.channel-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.channel-item i {
    font-size: 32px;
    color: var(--primary-color);
}

.channel-item span {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.analytics-visual {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.stat-card {
    background: white;
    padding: 24px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: 20px;
}

.stat-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-light);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-icon i {
    font-size: 28px;
    color: var(--primary-color);
}

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

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

.team-visual {
    display: flex;
    gap: 24px;
}

.agent-card {
    flex: 1;
    background: white;
    padding: 32px 24px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.agent-card i {
    font-size: 48px;
    color: var(--primary-color);
}

.agent-card span {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.status {
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.status.online {
    background: #D1FAE5;
    color: var(--success-color);
}

/* ====================
   Stats Section
   ==================== */
.stats-section {
    padding: 80px 0;
    background: var(--bg-gray);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 48px;
}

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

.stat-number {
    font-size: 56px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.stat-text {
    font-size: 18px;
    color: var(--text-secondary);
}

/* ====================
   CTA Section
   ==================== */
.cta-section {
    position: relative;
    padding: 120px 0;
    background: linear-gradient(135deg, #1880FF 0%, #0066E6 100%);
    overflow: hidden;
}

.cta-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.cta-particles {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image:
        radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
}

.cta-content {
    position: relative;
    text-align: center;
    color: white;
}

.cta-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
}

.cta-description {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.9;
}

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

/* ====================
   Footer
   ==================== */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 64px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 80px;
    margin-bottom: 48px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 600;
}

.footer-description {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

.footer-contact p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 8px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

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

.footer-column ul {
    list-style: none;
}

.footer-column li {
    margin-bottom: 12px;
}

.footer-column a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
}

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

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
}

/* SVG 图标样式 */
.footer-social a svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

/* ====================
   视频演示下拉菜单
   ==================== */
.video-dropdown {
    position: relative;
    display: inline-block;
}

.video-dropdown-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: none;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    font-size: 16px;
    font-weight: 500;
    font-family: inherit; /* 使用与 body 相同的字体 */
}

.video-dropdown-btn i {
    font-size: 12px;
    transition: transform 0.3s ease;
}

.video-dropdown:hover .video-dropdown-btn i,
.video-dropdown.active .video-dropdown-btn i {
    transform: rotate(180deg);
}

.video-dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    padding: 12px;
    min-width: 160px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
}

.video-dropdown:hover .video-dropdown-menu,
.video-dropdown.active .video-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.video-dropdown-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-radius: 8px;
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition);
    font-size: 14px;
}

.video-dropdown-item:hover {
    background: var(--bg-light);
    color: var(--primary-color);
}

.video-dropdown-item svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
    flex-shrink: 0;
}

.video-dropdown-item span {
    white-space: nowrap;
}

/* 首页视频演示按钮样式 */
.hero-actions .video-dropdown .video-dropdown-btn {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    padding: 16px 32px;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.hero-actions .video-dropdown .video-dropdown-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.hero-actions .video-dropdown .video-dropdown-menu {
    top: 0;
    left: calc(100% + 8px);
    right: auto;
}

/* 移动端视频下拉菜单适配 */
@media (max-width: 768px) {
    .video-dropdown-menu {
        right: auto;
        left: 0;
        min-width: 140px;
    }

    .video-dropdown-item {
        padding: 10px;
        font-size: 13px;
    }

    .video-dropdown-item svg {
        width: 16px;
        height: 16px;
    }

    .hero-actions .video-dropdown .video-dropdown-menu {
        right: auto;
        left: 0;
    }
}

/* ====================
   响应式设计
   ==================== */
@media (max-width: 1024px) {
    .hero-content,
    .feature-row {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    .core-feature-image-grid {
        grid-template-columns: 1fr;
    }



    .hero-image-wrapper {
        height: 400px;
    }

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

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

    .platforms-inner {
        flex-direction: column;
        align-items: flex-start;
    }

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

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

    .mobile-menu-toggle {
        display: block;
    }

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

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

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

    .core-features-grid {
        grid-template-columns: 1fr;
    }

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

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

    .footer-bottom {
        flex-direction: column;
        gap: 16px;
    }
}