/* ========================================
   岛数字世界 - 全局样式（海洋色系）
   ======================================== */

:root {
    --color-bg: #f0f7fa;
    --color-bg-secondary: #e6f1f6;
    --color-bg-tertiary: #dcedf4;
    --color-surface: #ffffff;
    --color-surface-hover: #f5fafe;
    --color-border: rgba(56, 189, 248, 0.25);
    --color-border-light: rgba(0, 0, 0, 0.06);
    --color-text: #1a3a4a;
    --color-text-secondary: #4a7a8f;
    --color-text-muted: #6891a5;
    --color-primary: #0ea5a8;
    --color-primary-light: #2dd4b7;
    --color-secondary: #38bdf8;
    --color-accent: #06b6d4;
    --gradient-primary: linear-gradient(135deg, #0ea5a8 0%, #38bdf8 100%);
    --gradient-accent: linear-gradient(135deg, #06b6d4 0%, #2dd4b7 100%);
    --gradient-warm: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
    --shadow-sm: 0 2px 8px rgba(14, 165, 168, 0.08);
    --shadow-md: 0 4px 24px rgba(14, 165, 168, 0.1);
    --shadow-lg: 0 8px 48px rgba(14, 165, 168, 0.12);
    --shadow-glow: 0 0 40px rgba(14, 165, 168, 0.1);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-family);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

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

ul {
    list-style: none;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 120px 0;
    position: relative;
}

/* ========================================
   按钮
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-family);
    font-weight: 500;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    text-decoration: none;
}

.btn-sm {
    padding: 8px 20px;
    font-size: 14px;
}

.btn-lg {
    padding: 14px 32px;
    font-size: 16px;
    border-radius: var(--radius-md);
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 4px 20px rgba(14, 165, 168, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(14, 165, 168, 0.3);
}

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

.btn-outline-light:hover {
    border-color: var(--color-primary);
    color: var(--color-primary-light);
    background: rgba(14, 165, 168, 0.08);
}

.btn-ghost {
    background: rgba(14, 165, 168, 0.06);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    backdrop-filter: blur(10px);
}

.btn-ghost:hover {
    background: rgba(14, 165, 168, 0.12);
    border-color: rgba(14, 165, 168, 0.3);
}

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

/* ========================================
   渐变文字
   ======================================== */
.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========================================
   导航栏
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(240, 247, 250, 0.92);
    backdrop-filter: blur(20px) saturate(1.2);
    border-bottom: 1px solid var(--color-border-light);
    padding: 10px 0;
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-text {
    letter-spacing: 1px;
}

.nav-links {
    display: flex;
    gap: 8px;
}

.nav-link {
    padding: 8px 16px;
    font-size: 14px;
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
    background: rgba(14, 165, 168, 0.08);
}

.nav-actions {
    display: flex;
    gap: 10px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: var(--transition);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 999;
    background: rgba(240, 247, 250, 0.98);
    backdrop-filter: blur(20px);
    padding-top: 100px;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.mobile-menu.open {
    opacity: 1;
    visibility: visible;
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 0 24px;
}

.mobile-nav-links a {
    font-size: 20px;
    padding: 12px 24px;
    color: var(--color-text-secondary);
    transition: var(--transition);
}

.mobile-nav-links a:hover {
    color: var(--color-text);
}

/* ========================================
   Hero
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 120px 24px 60px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 50% at 50% 0%, rgba(14, 165, 168, 0.12) 0%, transparent 60%),
        radial-gradient(ellipse 60% 40% at 70% 20%, rgba(56, 189, 248, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse 50% 30% at 30% 80%, rgba(45, 212, 183, 0.08) 0%, transparent 50%);
}

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

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 20px;
    background: rgba(14, 165, 168, 0.1);
    border: 1px solid rgba(14, 165, 168, 0.2);
    border-radius: 100px;
    font-size: 14px;
    color: var(--color-primary-light);
    margin-bottom: 32px;
}

.badge-dot {
    width: 6px;
    height: 6px;
    background: var(--color-secondary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.hero-title {
    font-size: clamp(40px, 7vw, 72px);
    font-weight: 900;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.title-line {
    display: block;
}

.hero-desc {
    font-size: clamp(16px, 2vw, 18px);
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 40px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 64px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 0;
    padding: 24px 40px;
    border-radius: var(--radius-lg);
}

.stat-item {
    text-align: center;
    padding: 0 32px;
}

.stat-number {
    font-size: 36px;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-suffix {
    font-size: 20px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    display: block;
    font-size: 13px;
    color: var(--color-text-muted);
    margin-top: 4px;
}

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

.hero-scroll-hint {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--color-text-muted);
    font-size: 12px;
    animation: float 3s ease-in-out infinite;
}

.scroll-arrow {
    width: 20px;
    height: 30px;
    border: 2px solid var(--color-text-muted);
    border-radius: 10px;
    position: relative;
}

.scroll-arrow::after {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 8px;
    background: var(--color-text-muted);
    border-radius: 2px;
    animation: scrollDot 2s infinite;
}

/* ========================================
   Section Header
   ======================================== */
.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    padding: 4px 16px;
    background: rgba(14, 165, 168, 0.1);
    border: 1px solid rgba(14, 165, 168, 0.2);
    border-radius: 100px;
    font-size: 13px;
    color: var(--color-primary-light);
    font-weight: 500;
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 16px;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   产品服务 Tabs
   ======================================== */
.product-tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.product-tab {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    font-family: var(--font-family);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.product-tab:hover {
    border-color: var(--color-border);
    color: var(--color-text);
    background: var(--color-surface-hover);
}

.product-tab.active {
    background: rgba(14, 165, 168, 0.1);
    border-color: rgba(14, 165, 168, 0.3);
    color: var(--color-primary-light);
}

.product-tab svg {
    opacity: 0.7;
}

.product-tab.active svg {
    opacity: 1;
}

/* Product Panel */
.product-panel {
    display: none;
    animation: fadeInPanel 0.5s ease;
}

.product-panel.active {
    display: block;
}

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

.product-name {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 8px;
}

.product-subtitle {
    font-size: 16px;
    color: var(--color-primary-light);
    margin-bottom: 16px;
}

.product-desc {
    color: var(--color-text-secondary);
    margin-bottom: 32px;
    line-height: 1.8;
}

.product-features {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.product-features li {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.feature-icon {
    font-size: 24px;
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(14, 165, 168, 0.08);
    border-radius: var(--radius-sm);
}

.product-features li strong {
    display: block;
    font-size: 15px;
    margin-bottom: 2px;
}

.product-features li p {
    font-size: 13px;
    color: var(--color-text-muted);
    line-height: 1.5;
}

/* Chat Demo */
.chat-demo {
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.chat-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    border-bottom: 1px solid var(--color-border-light);
    background: rgba(14, 165, 168, 0.04);
}

.chat-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.chat-name {
    font-weight: 600;
    font-size: 14px;
}

.chat-status {
    font-size: 12px;
    color: #22c55e;
}

.chat-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-height: 360px;
}

.chat-msg {
    max-width: 85%;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-size: 14px;
    line-height: 1.6;
    animation: slideInMsg 0.5s ease;
}

.chat-msg.bot {
    background: var(--color-bg-tertiary);
    border-bottom-left-radius: 4px;
    align-self: flex-start;
}

.chat-msg.user {
    background: var(--gradient-primary);
    color: #fff;
    border-bottom-right-radius: 4px;
    align-self: flex-end;
}

.chat-msg.typing {
    padding: 16px 20px;
}

.typing-dots {
    display: flex;
    gap: 6px;
}

.typing-dots span {
    width: 8px;
    height: 8px;
    background: var(--color-text-muted);
    border-radius: 50%;
    animation: typingBounce 1.4s infinite;
}

.typing-dots span:nth-child(2) { animation-delay: 0.2s; }
.typing-dots span:nth-child(3) { animation-delay: 0.4s; }

/* Digital Human Demo */
.digital-human-demo {
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.dh-screen {
    padding: 32px;
    text-align: center;
}

.dh-avatar-area {
    position: relative;
    width: 100%;
    margin: 0 auto 24px;
}

.dh-glow {
    position: absolute;
    inset: -20px;
    background: radial-gradient(circle, rgba(14, 165, 168, 0.15) 0%, transparent 70%);
    animation: pulse 3s infinite;
    z-index: 0;
}

.dh-narrators {
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: center;
    gap: 20px;
}

.dh-narrator {
    width: 140px;
    cursor: pointer;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0.6;
    filter: grayscale(0.3);
}

.dh-narrator.active {
    opacity: 1;
    filter: grayscale(0);
    transform: scale(1.05);
}

.dh-narrator img {
    width: 120px;
    height: 160px;
    object-fit: cover;
    object-position: top center;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    transition: all 0.4s ease;
    background: linear-gradient(135deg, rgba(14, 165, 168, 0.1), rgba(34, 211, 238, 0.1));
}

.dh-narrator.active img {
    border-color: var(--color-primary);
    box-shadow: 0 0 20px rgba(14, 165, 168, 0.3), 0 8px 24px rgba(0, 0, 0, 0.2);
}

.dh-narrator:hover {
    opacity: 1;
    filter: grayscale(0);
}

.dh-narrator-name {
    display: block;
    margin-top: 8px;
    font-size: 13px;
    color: var(--color-text-muted);
    font-weight: 500;
    transition: color 0.3s ease;
}

.dh-narrator.active .dh-narrator-name {
    color: var(--color-primary);
}

.dh-subtitle {
    background: rgba(0, 0, 0, 0.3);
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
}

.dh-subtitle p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.6;
    transition: opacity 0.3s ease;
}

.dh-controls {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

.dh-btn {
    padding: 8px 16px;
    background: rgba(14, 165, 168, 0.1);
    border: 1px solid rgba(14, 165, 168, 0.2);
    border-radius: var(--radius-sm);
    color: var(--color-primary-light);
    font-size: 13px;
    font-family: var(--font-family);
    cursor: pointer;
    transition: var(--transition);
}

.dh-btn:hover {
    background: rgba(14, 165, 168, 0.2);
}

/* Map Demo */
.map-demo {
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.map-container {
    position: relative;
    height: 300px;
    background:
        radial-gradient(circle at 30% 40%, rgba(14, 165, 168, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 70% 60%, rgba(6, 182, 212, 0.05) 0%, transparent 50%),
        var(--color-bg-secondary);
}

.map-route {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}

.map-point {
    position: absolute;
    width: 12px;
    height: 12px;
    background: var(--color-primary);
    border-radius: 50%;
    border: 2px solid var(--color-bg);
    z-index: 2;
    cursor: pointer;
    transition: var(--transition);
}

.map-point::after {
    content: '';
    position: absolute;
    inset: -6px;
    border-radius: 50%;
    border: 1px solid rgba(14, 165, 168, 0.3);
}

.map-point.active {
    background: var(--color-secondary);
    width: 16px;
    height: 16px;
}

.map-point.active::after {
    border-color: rgba(6, 182, 212, 0.3);
    animation: pulse 2s infinite;
}

.map-label {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    white-space: nowrap;
    font-size: 12px;
    color: var(--color-text-secondary);
    background: var(--color-surface);
    padding: 4px 10px;
    border-radius: 4px;
    border: 1px solid var(--color-border-light);
}

.map-info-card {
    padding: 16px 20px;
    border-top: 1px solid var(--color-border-light);
}

.map-info-title {
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 4px;
}

.map-info-card > p {
    font-size: 13px;
    color: var(--color-text-secondary);
    margin-bottom: 8px;
}

.map-info-meta {
    display: flex;
    gap: 16px;
    font-size: 12px;
    color: var(--color-text-muted);
}

/* Dashboard Demo */
.dashboard-demo {
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.dash-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 20px;
    border-bottom: 1px solid var(--color-border-light);
    font-size: 14px;
    font-weight: 600;
}

.dash-time {
    font-size: 12px;
    color: var(--color-text-muted);
    font-weight: 400;
}

.dash-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--color-border-light);
}

.dash-card {
    padding: 16px;
    background: var(--color-surface);
    text-align: center;
}

.dash-card-label {
    font-size: 11px;
    color: var(--color-text-muted);
    margin-bottom: 4px;
}

.dash-card-value {
    font-size: 22px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.dash-card-trend {
    font-size: 11px;
    color: var(--color-text-muted);
    margin-top: 2px;
}

.dash-card-trend.up {
    color: #22c55e;
}

.dash-chart {
    padding: 20px;
}

.chart-bars {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    height: 100px;
}

.chart-bar {
    flex: 1;
    background: var(--gradient-primary);
    border-radius: 4px 4px 0 0;
    position: relative;
    opacity: 0.5;
    transition: var(--transition);
}

.chart-bar.active,
.chart-bar.highlight {
    opacity: 1;
}

.chart-bar span {
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 10px;
    color: var(--color-text-muted);
}

/* Marketing Demo */
.marketing-demo {
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    padding: 32px;
}

.mk-card-header {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 32px;
    text-align: center;
}

.mk-metrics {
    display: flex;
    justify-content: center;
    gap: 40px;
}

.mk-metric {
    text-align: center;
}

.mk-metric-circle {
    width: 80px;
    height: 80px;
    position: relative;
    margin: 0 auto 10px;
}

.mk-metric-circle svg {
    width: 100%;
    height: 100%;
}

.mk-metric-circle span {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 700;
    color: var(--color-text);
}

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

/* Ticketing Demo */
.ticketing-demo {
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    padding: 28px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.ticketing-demo:hover {
    transform: translateY(-4px) scale(1.01);
    box-shadow: var(--shadow-lg), 0 0 30px rgba(14, 165, 168, 0.15);
}

.tk-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}
.tk-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
}
.tk-badge {
    font-size: 11px;
    padding: 3px 10px;
    border-radius: 20px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: #fff;
    font-weight: 500;
    animation: breatheGlow 2s ease-in-out infinite;
}

.tk-channels {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 18px;
}
.tk-channel {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
}
.tk-channel-icon {
    width: 24px;
    text-align: center;
    font-size: 15px;
}
.tk-channel-name {
    width: 36px;
    color: var(--color-text-secondary);
    font-weight: 500;
}
.tk-channel-bar {
    flex: 1;
    height: 8px;
    background: rgba(14, 165, 168, 0.1);
    border-radius: 4px;
    overflow: hidden;
}
.tk-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    border-radius: 4px;
    transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
}
.tk-channel-val {
    width: 32px;
    text-align: right;
    font-weight: 600;
    font-size: 12px;
    color: var(--color-primary);
}

.tk-devices {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 18px;
    padding: 14px;
    background: rgba(14, 165, 168, 0.04);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(14, 165, 168, 0.08);
}
.tk-device {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--color-text-secondary);
}
.tk-device-status {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}
.tk-device-status.online {
    background: #10b981;
    box-shadow: 0 0 6px rgba(16, 185, 129, 0.5);
}
.tk-device-tag {
    margin-left: auto;
    font-size: 11px;
    color: #10b981;
    font-weight: 500;
}

.tk-stats {
    display: flex;
    justify-content: space-around;
    padding-top: 16px;
    border-top: 1px solid var(--color-border-light);
}
.tk-stat {
    text-align: center;
}
.tk-stat-val {
    display: block;
    font-size: 20px;
    font-weight: 700;
    color: var(--color-primary);
}
.tk-stat-label {
    font-size: 12px;
    color: var(--color-text-muted);
    margin-top: 2px;
}

/* ========================================
   解决方案
   ======================================== */
.solutions {
    background: var(--color-bg-secondary);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.solution-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    transition: var(--transition);
    cursor: default;
}

.solution-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-border);
    box-shadow: var(--shadow-glow);
}

.solution-icon {
    font-size: 40px;
    margin-bottom: 20px;
}

.solution-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.solution-card p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.solution-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.solution-tags li {
    padding: 4px 12px;
    background: rgba(14, 165, 168, 0.08);
    border-radius: 100px;
    font-size: 12px;
    color: var(--color-primary-light);
}

/* ========================================
   核心优势
   ======================================== */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.advantage-card {
    position: relative;
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: 40px 28px;
    transition: var(--transition);
    overflow: hidden;
}

.advantage-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-border);
    box-shadow: var(--shadow-glow);
}

.advantage-number {
    position: absolute;
    top: 16px;
    right: 20px;
    font-size: 48px;
    font-weight: 900;
    color: rgba(14, 165, 168, 0.06);
    line-height: 1;
}

.advantage-icon {
    margin-bottom: 20px;
}

.advantage-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.advantage-card p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ========================================
   客户案例
   ======================================== */
.cases {
    background: var(--color-bg-secondary);
}

.cases-carousel {
    position: relative;
    overflow: hidden;
}

.cases-track {
    display: flex;
    gap: 24px;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.case-card {
    min-width: calc(33.333% - 16px);
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    flex-shrink: 0;
}

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

.case-image {
    height: 160px;
    display: flex;
    align-items: flex-start;
    justify-content: flex-start;
    padding: 16px;
}

.case-type {
    padding: 4px 12px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 100px;
    font-size: 12px;
    color: #fff;
    backdrop-filter: blur(10px);
}

.case-content {
    padding: 24px;
}

.case-content h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.case-content p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

.case-results {
    display: flex;
    gap: 24px;
}

.case-result {
    display: flex;
    flex-direction: column;
}

.result-value {
    font-size: 24px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.carousel-controls {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 32px;
}

.carousel-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    color: var(--color-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.carousel-btn:hover {
    border-color: var(--color-primary);
    background: rgba(14, 165, 168, 0.1);
}

/* Partners */
.partners {
    margin-top: 80px;
    text-align: center;
}

.partners-title {
    font-size: 14px;
    color: var(--color-text-muted);
    margin-bottom: 32px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.partners-track {
    display: flex;
    gap: 0;
    animation: scrollPartners 30s linear infinite;
    width: max-content;
}

.partner-logo {
    padding: 12px 40px;
    font-size: 14px;
    color: var(--color-text-muted);
    white-space: nowrap;
    border-right: 1px solid var(--color-border-light);
    opacity: 0.5;
    transition: var(--transition);
}

.partner-logo:hover {
    opacity: 1;
    color: var(--color-text);
}

/* ========================================
   关于我们
   ======================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-content .section-tag {
    margin-bottom: 16px;
}

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

.about-desc {
    color: var(--color-text-secondary);
    margin-bottom: 16px;
    line-height: 1.8;
}

.about-highlights {
    display: flex;
    gap: 40px;
    margin-top: 32px;
}

.highlight-value {
    font-size: 36px;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.about-image-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.about-img-card {
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    position: relative;
    overflow: hidden;
    min-height: 180px;
    display: flex;
    align-items: flex-end;
}

.about-img-card.wide {
    grid-column: 1 / -1;
}

.img-card-content {
    position: relative;
    z-index: 1;
}

.img-card-icon {
    font-size: 28px;
    margin-bottom: 12px;
}

.img-card-content h4 {
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 4px;
}

.img-card-content p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
}

/* ========================================
   联系我们 CTA
   ======================================== */
.contact-cta {
    padding: 120px 0;
}

.cta-wrapper {
    position: relative;
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-xl);
    padding: 60px;
    overflow: hidden;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
}

.cta-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.cta-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
}

.cta-orb.orb-1 {
    width: 300px;
    height: 300px;
    background: rgba(14, 165, 168, 0.12);
    top: -100px;
    right: -100px;
}

.cta-orb.orb-2 {
    width: 200px;
    height: 200px;
    background: rgba(45, 212, 183, 0.1);
    bottom: -50px;
    left: -50px;
}

.cta-content {
    position: relative;
    z-index: 1;
}

.cta-content h2 {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 12px;
}

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

.cta-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    background: var(--color-bg);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-family: var(--font-family);
    font-size: 14px;
    transition: var(--transition);
    outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-muted);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(14, 165, 168, 0.1);
}

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2 4l4 4 4-4' stroke='%2364748b' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
}

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

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.cta-info {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 28px;
}

.cta-info-item {
    display: flex;
    gap: 16px;
    align-items: center;
}

.cta-info-icon {
    width: 48px;
    height: 48px;
    background: rgba(14, 165, 168, 0.1);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
}

.cta-info-label {
    font-size: 13px;
    color: var(--color-text-muted);
    margin-bottom: 2px;
}

.cta-info-value {
    font-size: 16px;
    font-weight: 600;
}

/* ========================================
   页脚
   ======================================== */
.footer {
    border-top: 1px solid var(--color-border-light);
    padding: 60px 0 30px;
    background: var(--color-bg-secondary);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 48px;
}

.footer-brand .nav-logo {
    margin-bottom: 16px;
}

.footer-desc {
    font-size: 14px;
    color: var(--color-text-muted);
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    transition: var(--transition);
}

.social-link:hover {
    border-color: var(--color-primary);
    color: var(--color-primary-light);
    background: rgba(14, 165, 168, 0.1);
}

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

.footer-links-group li {
    margin-bottom: 10px;
}

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

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 24px;
    border-top: 1px solid var(--color-border-light);
    font-size: 13px;
    color: var(--color-text-muted);
}

.footer-bottom-links {
    display: flex;
    gap: 24px;
}

.footer-bottom-links a {
    color: var(--color-text-muted);
}

.footer-bottom-links a:hover {
    color: var(--color-text);
}

/* ========================================
   响应式
   ======================================== */
@media (max-width: 1024px) {
    .product-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

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

    .about-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .cta-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
        padding: 40px;
    }

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

    .case-card {
        min-width: calc(50% - 12px);
    }
}

@media (max-width: 768px) {
    .section {
        padding: 80px 0;
    }

    .nav-links,
    .nav-actions {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .mobile-menu {
        display: block;
    }

    .hero-stats {
        flex-wrap: wrap;
        gap: 16px;
        padding: 20px;
    }

    .stat-divider {
        display: none;
    }

    .stat-item {
        padding: 8px 16px;
    }

    .product-tabs {
        overflow-x: auto;
        justify-content: flex-start;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        padding-bottom: 4px;
    }

    .product-tabs::-webkit-scrollbar {
        display: none;
    }

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

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

    .form-row {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

    .case-card {
        min-width: calc(100% - 0px);
    }

    .hero-title {
        font-size: clamp(32px, 8vw, 56px);
    }

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

    .about-highlights {
        gap: 24px;
    }

    .cta-wrapper {
        padding: 28px;
    }
}

@media (max-width: 480px) {
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .mk-metrics {
        gap: 20px;
    }

    .about-highlights {
        flex-direction: column;
        gap: 16px;
    }
}