/* ========================================
   PPCWISER 智赢 - 官方网站样式
   设计规范：智慧蓝(60%) + 盈利橙(10%) + 云端白(30%)
   风水心法：水克火 - 用理智控制花费
   ======================================== */

/* CSS Variables */
:root {
    /* Brand Colors - 智慧蓝（五行属水，明亮通透） */
    --color-primary: #0078D4;           /* Azure Blue - 明亮科技蓝 */
    --color-primary-dark: #106EBE;      /* 深蓝悬停态 */
    --color-primary-light: #E6F2FF;     /* 浅蓝背景 */
    --color-primary-deep: #1B4B8A;      /* Footer深蓝（阳水，非死水黑） */

    /* CTA Colors - 盈利橙（五行属火/金，点睛之笔） */
    --color-cta: #FF6D00;               /* 活力橙 - 只用于重要按钮和利润曲线 */
    --color-cta-hover: #E56200;
    --color-success: #22C55E;           /* 绿色 - ACoS下降 */

    /* Neutral Colors - 云端白（五行属金，金生水） */
    --color-white: #FFFFFF;
    --color-bg: #F8FAFC;                /* 极淡灰白，更通透 */
    --color-bg-alt: #F1F5F9;
    --color-text: #1E293B;              /* 深蓝灰文字，非纯黑 */
    --color-text-secondary: #64748B;
    --color-text-muted: #94A3B8;
    --color-border: #E2E8F0;

    /* Typography - 现代无衬线体，干净利落 */
    --font-family: 'Inter', 'Roboto', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 14px;
    --font-size-xs: 12px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 32px;
    --font-size-4xl: 48px;

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

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

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.12);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;

    /* Layout */
    --max-width: 1200px;
    --navbar-height: 80px;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
    color: var(--color-primary-dark);
}

ul, ol {
    list-style: none;
}

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

/* Container */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-normal);
    white-space: nowrap;
}

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

.btn-cta:hover {
    background: var(--color-cta-hover);
    border-color: var(--color-cta-hover);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 109, 0, 0.3);
}

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

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

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

.btn-block {
    width: 100%;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--navbar-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: all var(--transition-normal);
}

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

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text);
}

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

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--color-white);
    font-size: var(--font-size-xl);
    font-weight: 700;
    border-radius: var(--radius-md);
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-primary);
}

.logo-cn {
    color: var(--color-text);
}

.logo-img {
    height: 56px;
    width: auto;
}

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

.nav-link {
    color: var(--color-text-secondary);
    font-weight: 500;
    padding: var(--spacing-sm) 0;
    position: relative;
}

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

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

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

.nav-cta {
    padding: var(--spacing-sm) var(--spacing-lg);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

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

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(var(--navbar-height) + var(--spacing-3xl)) 0 var(--spacing-3xl);
    background: linear-gradient(180deg, var(--color-white) 0%, var(--color-bg) 100%);
    overflow: hidden;
}

.hero-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-3xl);
    position: relative;
    z-index: 1;
}

.hero-bg {
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-primary-light) 0%, transparent 70%);
    opacity: 0.5;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 600px;
    flex: 1;
}

.hero-image {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-logo {
    max-width: 400px;
    width: 100%;
    height: auto;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

/* Dashboard Preview - 数据仪表盘预览 */
.dashboard-preview {
    width: 420px;
    background: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    border: 1px solid var(--color-border);
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 0.3s;
    opacity: 0;
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
}

.dashboard-title {
    font-size: var(--font-size-base);
    font-weight: 600;
}

.dashboard-date {
    font-size: var(--font-size-xs);
    opacity: 0.8;
    background: rgba(255, 255, 255, 0.15);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
}

.dashboard-stats-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
}

.dashboard-stat {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

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

.dashboard-stat-value {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-text);
}

.dashboard-stat-trend {
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.dashboard-stat-trend.up {
    color: var(--color-success);
}

.dashboard-stat-trend.down {
    color: var(--color-success);  /* ACoS下降是好事，用绿色 */
}

.dashboard-chart {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-white);
}

.chart-svg {
    width: 100%;
    height: 100px;
}

.chart-legend {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
}

.legend-dot {
    width: 10px;
    height: 10px;
    border-radius: var(--radius-full);
}

.legend-dot.orange {
    background: var(--color-cta);
}

.legend-dot.green {
    background: var(--color-success);
}

.dashboard-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-white);
    border-top: 1px solid var(--color-border);
}

.dashboard-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-xs);
    color: var(--color-success);
    font-weight: 500;
}

.dashboard-badge svg {
    width: 14px;
    height: 14px;
}

.dashboard-time {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.hero-title {
    font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-4xl));
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-size-2xl);
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.hero-desc {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-2xl);
    max-width: 600px;
}

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

.stat-card {
    display: flex;
    flex-direction: column;
    padding: var(--spacing-lg);
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    min-width: 140px;
}

.stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-top: var(--spacing-xs);
}

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

/* Section Common */
section {
    padding: var(--spacing-4xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

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

/* Trinity Section */
.trinity {
    background: var(--color-white);
}

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

.trinity-card {
    padding: var(--spacing-2xl);
    background: var(--color-bg);
    border-radius: var(--radius-xl);
    text-align: center;
    transition: all var(--transition-normal);
}

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

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

.trinity-card-primary .trinity-icon {
    background: rgba(255, 255, 255, 0.2);
    color: var(--color-white);
}

.trinity-card-primary .trinity-desc {
    color: rgba(255, 255, 255, 0.8);
}

.trinity-card-primary .trinity-list li {
    color: rgba(255, 255, 255, 0.9);
}

.trinity-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
}

.trinity-icon svg {
    width: 32px;
    height: 32px;
}

.trinity-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.trinity-desc {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.trinity-list {
    text-align: left;
}

.trinity-list li {
    padding: var(--spacing-sm) 0;
    font-size: var(--font-size-sm);
    position: relative;
    padding-left: var(--spacing-lg);
}

.trinity-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-primary);  /* 列表箭头用蓝色，橙色只用于CTA */
}

.trinity-card-primary .trinity-list li::before {
    color: var(--color-white);
}

/* Features Section */
.features {
    background: var(--color-bg);
}

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

.feature-card {
    background: var(--color-white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    transition: all var(--transition-normal);
    border: 1px solid var(--color-border);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary-light);
}

.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
}

.feature-icon svg {
    width: 28px;
    height: 28px;
}

.feature-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.feature-pain {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-bg);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--color-primary);
}

.feature-solution {
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-lg);
}

.feature-solution ul {
    margin-top: var(--spacing-sm);
}

.feature-solution li {
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-lg);
    position: relative;
}

.feature-solution li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-success);
}

.feature-stat {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-sm);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

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

/* Pricing Section */
.pricing {
    background: var(--color-white);
}

/* 云主机配置说明 */
.pricing-server-info {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--color-primary-light);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-primary);
}

.server-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.server-specs {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.spec-item strong {
    color: var(--color-primary);
}

.spec-divider {
    color: var(--color-border);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    align-items: start;
}

.pricing-card {
    position: relative;
    background: var(--color-white);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    text-align: center;
    transition: all var(--transition-normal);
}

.pricing-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
}

.pricing-card-featured {
    border-color: var(--color-primary);
    transform: scale(1.05);
    box-shadow: var(--shadow-xl);
}

.pricing-card-featured:hover {
    transform: scale(1.05);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-cta);
    color: var(--color-white);
    padding: var(--spacing-xs) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.pricing-header {
    margin-bottom: var(--spacing-lg);
}

.pricing-name {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.pricing-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.pricing-price {
    margin-bottom: var(--spacing-xl);
}

.price-amount {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--color-primary);
}

.price-unit {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.pricing-features {
    text-align: left;
    margin-bottom: var(--spacing-xl);
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    font-size: var(--font-size-sm);
}

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

/* FAQ Section */
.faq {
    background: var(--color-bg);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--spacing-lg) var(--spacing-xl);
    background: none;
    border: none;
    cursor: pointer;
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
    text-align: left;
    transition: all var(--transition-fast);
}

.faq-question:hover {
    color: var(--color-primary);
}

.faq-icon {
    width: 24px;
    height: 24px;
    color: var(--color-primary);
    transition: transform var(--transition-normal);
    flex-shrink: 0;
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.faq-item.active .faq-answer {
    max-height: 1000px;
}

.faq-answer p,
.faq-answer ul,
.faq-answer ol {
    padding: 0 var(--spacing-xl);
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    line-height: 1.8;
}

.faq-answer p:last-child,
.faq-answer ul:last-child,
.faq-answer ol:last-child {
    padding-bottom: var(--spacing-xl);
}

.faq-answer ul,
.faq-answer ol {
    padding-left: calc(var(--spacing-xl) + var(--spacing-lg));
}

.faq-answer li {
    list-style: disc;
    margin-bottom: var(--spacing-xs);
}

.faq-answer ol li {
    list-style: decimal;
}

/* Contact Section */
.contact {
    background: var(--color-white);
}

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

.contact-card {
    text-align: center;
    padding: var(--spacing-2xl);
    background: var(--color-bg);
    border-radius: var(--radius-xl);
    transition: all var(--transition-normal);
}

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

.contact-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-lg);
}

.contact-icon svg {
    width: 28px;
    height: 28px;
}

.contact-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.contact-detail {
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.contact-note {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* Footer */
.footer {
    background: var(--color-primary-deep);  /* 深蓝色（阳水），非死水黑 */
    color: var(--color-white);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-content {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.footer-logo-wrap {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.footer-logo {
    max-height: 160px;
    width: auto;
    opacity: 0.9;
}

.footer-name {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--spacing-xs);
}

.footer-slogan {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-xs);
}

.footer-company {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.7);
}

.footer .logo-icon {
    margin: 0 auto var(--spacing-md);
}

.footer .logo-text {
    display: block;
    font-size: var(--font-size-2xl);
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.footer .logo-cn {
    color: rgba(255, 255, 255, 0.7);
}

.footer-slogan {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-sm);
}

.footer-company {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.6);
}

.footer-tagline {
    width: 100%;
    font-size: var(--font-size-base);
    color: rgba(255, 255, 255, 0.7);
    text-align: center;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    font-style: italic;
    letter-spacing: 0.5px;
}

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

.copyright,
.icp {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.5);
}

.icp a {
    color: rgba(255, 255, 255, 0.5);
}

.icp a:hover {
    color: var(--color-white);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .trinity-grid,
    .features-grid,
    .pricing-grid,
    .contact-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .pricing-card-featured {
        transform: none;
    }

    .pricing-card-featured:hover {
        transform: none;
    }
}

@media (max-width: 768px) {
    :root {
        --navbar-height: 64px;
    }

    .nav-menu {
        position: fixed;
        top: var(--navbar-height);
        left: 0;
        right: 0;
        background: var(--color-white);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }

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

    .nav-cta {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero {
        min-height: auto;
        padding: calc(var(--navbar-height) + var(--spacing-2xl)) 0 var(--spacing-2xl);
    }

    .hero-wrapper {
        flex-direction: column;
        text-align: center;
    }

    .hero-content {
        max-width: 100%;
    }

    .hero-image {
        order: -1;
        margin-bottom: var(--spacing-xl);
    }

    .hero-logo {
        max-width: 280px;
    }

    .dashboard-preview {
        width: 100%;
        max-width: 360px;
    }

    .dashboard-stats-row {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .dashboard-stat {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        padding: var(--spacing-sm) 0;
        border-bottom: 1px solid var(--color-border);
    }

    .dashboard-stat:last-child {
        border-bottom: none;
    }

    .dashboard-stat-value {
        font-size: var(--font-size-base);
    }

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

    .stat-card {
        flex-direction: row;
        align-items: center;
        gap: var(--spacing-md);
        width: 100%;
        max-width: 300px;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .trinity-grid,
    .features-grid,
    .pricing-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: var(--font-size-2xl);
    }

    section {
        padding: var(--spacing-3xl) 0;
    }

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

/* Smooth scroll padding for anchor links */
:target::before {
    content: '';
    display: block;
    height: var(--navbar-height);
    margin-top: calc(-1 * var(--navbar-height));
}

/* Print styles */
@media print {
    .navbar,
    .hero-cta,
    .btn,
    .nav-toggle {
        display: none !important;
    }

    body {
        font-size: 12pt;
        line-height: 1.5;
    }

    .hero {
        min-height: auto;
        padding: 1cm 0;
    }
}

/* Animation keyframes */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Apply animations */
.hero-title,
.hero-subtitle,
.hero-desc,
.hero-stats,
.hero-cta {
    animation: fadeInUp 0.6s ease forwards;
    opacity: 0;
}

.hero-subtitle {
    animation-delay: 0.1s;
}

.hero-desc {
    animation-delay: 0.2s;
}

.hero-stats {
    animation-delay: 0.3s;
}

.hero-cta {
    animation-delay: 0.4s;
}