/* ========================================
   深蓝数据分析与平台导航门户主题
   配色：深蓝主色调 #0F2B5B，强调色 #1E88E5，成功色 #26A69A
   ======================================== */

/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* CSS 变量定义 */
:root {
    --primary: #0F2B5B;
    --primary-light: #1A3D7C;
    --primary-dark: #091E42;
    --accent: #1E88E5;
    --accent-light: #42A5F5;
    --accent-dark: #1565C0;
    --success: #26A69A;
    --warning: #FFA726;
    --danger: #EF5350;
    --text-primary: #1A202C;
    --text-secondary: #4A5568;
    --text-muted: #718096;
    --bg-white: #FFFFFF;
    --bg-light: #F7FAFC;
    --bg-alt: #EDF2F7;
    --border-color: #E2E8F0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(15, 43, 91, 0.15);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 基础样式 */
html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul, ol {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
}

.section-alt {
    background-color: var(--bg-light);
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 50px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background-color: rgba(30, 136, 229, 0.1);
    color: var(--accent);
    font-size: 14px;
    font-weight: 500;
    border-radius: 20px;
    margin-bottom: 16px;
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 16px;
    line-height: 1.3;
}

.section-desc {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 16px;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 14px;
}

.btn-block {
    width: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(30, 136, 229, 0.3);
}

.btn-primary:hover {
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(30, 136, 229, 0.4);
}

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

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

.btn-text {
    background-color: transparent;
    color: var(--accent);
    padding: 8px 12px;
}

.btn-text:hover {
    background-color: rgba(30, 136, 229, 0.08);
}

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

.btn-demo:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.btn-primary-demo {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    color: white;
}

.btn-primary-demo:hover {
    color: white;
    opacity: 0.9;
}

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

.btn-light:hover {
    background-color: var(--bg-alt);
    color: var(--primary);
}

.btn-outline-light {
    background-color: transparent;
    color: white;
    border: 2px solid white;
}

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

/* 头部导航 */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

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

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--primary);
    font-weight: 700;
    font-size: 20px;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
    color: white;
    border-radius: var(--radius-sm);
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-link {
    display: block;
    padding: 8px 14px;
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius-sm);
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent);
    background-color: rgba(30, 136, 229, 0.08);
}

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

.menu-toggle,
.menu-close {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-sm);
}

.menu-toggle:hover,
.menu-close:hover {
    background-color: var(--bg-alt);
}

/* Hero 区域 */
.hero {
    padding: 140px 0 100px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(30, 136, 229, 0.2) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-wave {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: var(--bg-white);
    clip-path: polygon(0 100%, 100% 100%, 100% 0, 0 60%);
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    font-size: 14px;
    margin-bottom: 24px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background-color: var(--success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

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

.hero-title {
    font-size: 42px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 17px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 32px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.hero-contact {
    display: flex;
    align-items: center;
}

.hero-phone {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.9);
    font-size: 15px;
}

.hero-phone:hover {
    color: white;
}

.hero-banner-wrapper {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.hero-banner {
    width: 100%;
    height: auto;
}

.banner-badge {
    position: absolute;
    bottom: 20px;
    left: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background-color: rgba(15, 43, 91, 0.9);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-md);
    font-size: 14px;
    color: white;
}

/* 安全提示条 */
.security-notice {
    padding: 16px 0;
    background-color: #FFF3E0;
    border-bottom: 1px solid #FFE0B2;
}

.notice-content {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    color: #E65100;
}

.notice-content svg {
    flex-shrink: 0;
    margin-top: 2px;
}

.notice-content p {
    font-size: 14px;
    line-height: 1.6;
}

.notice-content strong {
    font-weight: 600;
}

/* 平台分类 */
.platforms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 24px;
}

.platform-card {
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: var(--transition);
}

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

.platform-header {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
}

.platform-icon {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 16px;
    color: white;
}

.platform-icon.okx {
    background: linear-gradient(135deg, #000 0%, #333 100%);
}

.platform-icon.binance {
    background: linear-gradient(135deg, #F3BA2F 0%, #DAA520 100%);
    color: #000;
}

.platform-icon.bitget {
    background: linear-gradient(135deg, #00F0FF 0%, #00B8D4 100%);
    color: #000;
}

.platform-icon.bybit {
    background: linear-gradient(135deg, #F7A600 0%, #FF8C00 100%);
    color: #000;
}

.platform-icon.kraken {
    background: linear-gradient(135deg, #5741D9 0%, #4527A0 100%);
}

.platform-icon.other {
    background: linear-gradient(135deg, var(--success) 0%, #00897B 100%);
}

.platform-name {
    font-size: 20px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 6px;
}

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

.platform-devices {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.device-tag {
    padding: 4px 12px;
    background-color: var(--bg-alt);
    color: var(--text-secondary);
    font-size: 13px;
    border-radius: 4px;
}

.platform-tip {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 20px;
    padding: 10px;
    background-color: var(--bg-light);
    border-radius: var(--radius-sm);
}

.platform-actions {
    display: flex;
    gap: 8px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

/* 下载中心 */
.device-tabs {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 40px;
}

.device-tab {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background-color: var(--bg-white);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.device-tab:hover {
    border-color: var(--accent-light);
    color: var(--accent);
}

.device-tab.active {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    border-color: var(--accent);
    color: white;
}

.download-panel {
    display: none;
}

.download-panel.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

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

.download-intro {
    background-color: var(--bg-white);
    padding: 24px;
    border-radius: var(--radius-lg);
    margin-bottom: 24px;
    border-left: 4px solid var(--accent);
}

.download-intro h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 8px;
}

.download-intro p {
    color: var(--text-secondary);
    line-height: 1.7;
}

.download-platforms-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 24px;
}

.download-item {
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    display: flex;
    justify-content: space-between;
    gap: 20px;
    align-items: flex-start;
    transition: var(--transition);
}

.download-item:hover {
    border-color: var(--accent-light);
    box-shadow: var(--shadow-sm);
}

.download-info h4 {
    font-size: 17px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 8px;
}

.download-meta {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.download-tips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

.tip {
    font-size: 13px;
    color: var(--text-secondary);
}

.tip.tag {
    padding: 3px 10px;
    background-color: rgba(38, 166, 154, 0.1);
    color: var(--success);
    border-radius: 4px;
    font-weight: 500;
}

.download-actions {
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: flex-end;
}

.source-note {
    font-size: 12px;
    color: var(--text-muted);
    text-align: right;
}

.check-list {
    margin-top: 12px;
}

.check-list li {
    padding: 6px 0;
    font-size: 14px;
    color: var(--text-secondary);
}

.download-note {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 20px;
    background-color: rgba(30, 136, 229, 0.08);
    border-radius: var(--radius-md);
    color: var(--accent-dark);
}

.download-note.warning {
    background-color: rgba(239, 83, 80, 0.08);
    color: var(--danger);
}

.download-note p {
    font-size: 14px;
    line-height: 1.7;
}

/* 功能介绍 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

.feature-card {
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: var(--transition);
}

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

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(30, 136, 229, 0.1) 0%, rgba(15, 43, 91, 0.1) 100%);
    color: var(--accent);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 19px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 12px;
}

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

.feature-risk-notice {
    padding: 20px;
    background-color: rgba(239, 83, 80, 0.08);
    border: 1px solid rgba(239, 83, 80, 0.2);
    border-radius: var(--radius-md);
    color: var(--danger);
}

.feature-risk-notice p {
    font-size: 14px;
    line-height: 1.7;
}

/* 安装流程 */
.guide-steps {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.step-item {
    display: flex;
    gap: 24px;
    position: relative;
}

.step-number {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
    color: white;
    font-size: 24px;
    font-weight: 700;
    border-radius: 50%;
    box-shadow: 0 8px 20px rgba(30, 136, 229, 0.3);
    z-index: 1;
}

.step-content {
    padding-bottom: 40px;
    flex: 1;
}

.step-content h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 12px;
}

.step-content p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 12px;
}

.step-tip {
    padding: 12px 16px;
    background-color: var(--bg-white);
    border-left: 3px solid var(--accent);
    font-size: 14px;
    color: var(--text-muted);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.step-line {
    position: absolute;
    left: 29px;
    top: 60px;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent) 0%, var(--border-color) 100%);
}

.step-item:last-child .step-content {
    padding-bottom: 0;
}

.step-item:last-child .step-line {
    display: none;
}

/* 安全说明 */
.security-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.security-card {
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: var(--transition);
}

.security-card:hover {
    border-color: var(--success);
    box-shadow: 0 4px 16px rgba(38, 166, 154, 0.15);
}

.security-icon {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(38, 166, 154, 0.1);
    color: var(--success);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
}

.security-card h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 12px;
}

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

/* 资讯列表 - 必须严格遵守的Grid规则 */
ul.article-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
    list-style: none;
    margin: 0;
    padding: 0;
    width: 100%;
    box-sizing: border-box;
}

ul.article-cards > li.article-card {
    min-width: 0;
    width: auto;
    max-width: none;
    margin: 0;
    float: none;
    box-sizing: border-box;
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
}

ul.article-cards > li.article-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-light);
}

.article-card .card-thumb {
    width: 100%;
    overflow: hidden;
    aspect-ratio: 16/9;
}

.article-card .card-thumb img {
    display: block;
    width: 100%;
    max-width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.article-card:hover .card-thumb img {
    transform: scale(1.05);
}

.article-card .card-body {
    padding: 20px;
}

.article-card .card-title {
    overflow-wrap: anywhere;
    font-size: 16px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 10px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card .card-date {
    display: block;
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.article-card .card-summary {
    overflow-wrap: anywhere;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

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

.faq-item {
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: var(--accent-light);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    background: none;
    border: none;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    text-align: left;
    cursor: pointer;
    gap: 16px;
}

.faq-icon {
    flex-shrink: 0;
    color: var(--text-muted);
    transition: transform 0.3s ease;
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 24px 20px;
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* 关于我们 */
.about-wrapper {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 40px;
    align-items: start;
}

.about-content .section-tag {
    margin-bottom: 12px;
}

.about-content .section-title {
    text-align: left;
    margin-bottom: 20px;
}

.about-desc {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 28px;
}

.services-list h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 16px;
}

.services-list ul {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 28px;
}

.services-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    color: var(--text-secondary);
}

.services-list li svg {
    color: var(--success);
    flex-shrink: 0;
}

.about-disclaimer {
    padding: 20px;
    background-color: rgba(239, 83, 80, 0.06);
    border: 1px solid rgba(239, 83, 80, 0.15);
    border-radius: var(--radius-md);
}

.about-disclaimer p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.about-disclaimer strong {
    color: var(--danger);
}

.about-stats-card {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    padding: 32px;
    border-radius: var(--radius-lg);
    color: white;
    position: sticky;
    top: 90px;
}

.about-stats-card h4 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 24px;
}

.principle-item {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

.principle-item:last-child {
    margin-bottom: 0;
}

.principle-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--accent-light);
}

.principle-item h5 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.principle-item p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
}

/* 联系方式 */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.contact-card {
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px;
    margin-bottom: 20px;
}

.contact-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    color: white;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
}

.contact-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 8px;
}

.contact-card h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 16px;
}

.contact-card > p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.contact-phone {
    display: block;
    font-size: 24px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 12px;
}

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

.help-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    font-size: 14px;
    color: var(--text-secondary);
}

.help-list li svg {
    color: var(--success);
    flex-shrink: 0;
}

.contact-note-card {
    padding: 20px;
    background-color: #FFF8E1;
    border-radius: var(--radius-md);
}

.contact-note-card h4 {
    font-size: 16px;
    font-weight: 600;
    color: #FF8F00;
    margin-bottom: 10px;
}

.contact-note-card p {
    font-size: 14px;
    color: #795548;
    line-height: 1.7;
}

.contact-form-wrapper {
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.contact-form-wrapper h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 8px;
}

.form-desc {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 24px;
}

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

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-family: inherit;
    color: var(--text-primary);
    transition: var(--transition);
    background-color: var(--bg-white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(30, 136, 229, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-notice {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 12px 16px;
    background-color: #FFEBEE;
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--danger);
    margin-bottom: 20px;
}

.form-notice svg {
    flex-shrink: 0;
    margin-top: 1px;
}

.form-success {
    text-align: center;
    padding: 40px 20px;
}

.form-success svg {
    color: var(--success);
    margin-bottom: 16px;
}

.form-success h4 {
    font-size: 20px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 12px;
}

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

/* 文章详情页 */
.article-detail {
    padding: 120px 0 80px;
}

.article-container {
    max-width: 800px;
    margin: 0 auto;
}

.breadcrumb {
    margin-bottom: 24px;
    font-size: 14px;
    color: var(--text-muted);
}

.breadcrumb a {
    color: var(--text-secondary);
}

.breadcrumb a:hover {
    color: var(--accent);
}

.article-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1.3;
    margin-bottom: 20px;
}

.article-summary-box {
    padding: 20px;
    background-color: var(--bg-light);
    border-left: 4px solid var(--accent);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    margin-bottom: 28px;
}

.article-summary {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    font-style: italic;
    margin-bottom: 12px;
}

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

.meta-date {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.article-cover-wrapper {
    margin-bottom: 32px;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.article-cover {
    width: 100%;
    height: auto;
}

.article-content {
    font-size: 16px;
    line-height: 1.9;
    color: var(--text-primary);
    margin-bottom: 40px;
}

.article-content h2,
.article-content h3,
.article-content h4 {
    color: var(--primary);
    margin-top: 32px;
    margin-bottom: 16px;
    font-weight: 600;
}

.article-content h2 {
    font-size: 24px;
}

.article-content h3 {
    font-size: 20px;
}

.article-content p {
    margin-bottom: 20px;
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    margin: 24px 0;
}

.article-content ul,
.article-content ol {
    margin-bottom: 20px;
    padding-left: 24px;
}

.article-content ul {
    list-style: disc;
}

.article-content ol {
    list-style: decimal;
}

.article-content li {
    margin-bottom: 10px;
}

.article-security-notice {
    display: flex;
    gap: 16px;
    padding: 24px;
    background-color: rgba(38, 166, 154, 0.08);
    border: 1px solid rgba(38, 166, 154, 0.2);
    border-radius: var(--radius-lg);
    margin-bottom: 40px;
}

.notice-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--success);
    color: white;
    border-radius: var(--radius-md);
}

.article-security-notice h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--success);
    margin-bottom: 8px;
}

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

.related-navigation {
    margin-bottom: 40px;
}

.related-title {
    font-size: 22px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 20px;
}

.related-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.related-link {
    display: flex;
    gap: 16px;
    padding: 20px;
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    transition: var(--transition);
}

.related-link:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
    color: var(--text-primary);
}

.related-link-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(30, 136, 229, 0.1);
    color: var(--accent);
    border-radius: var(--radius-sm);
}

.related-link-content h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 4px;
}

.related-link-content p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.5;
}

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

/* 详情页CTA */
.detail-cta {
    padding: 60px 0;
}

.cta-box {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    padding: 48px;
    border-radius: var(--radius-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
    color: white;
}

.cta-content h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 12px;
}

.cta-content p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.7;
}

.cta-actions {
    display: flex;
    gap: 16px;
    flex-shrink: 0;
    flex-wrap: wrap;
}

/* 页脚 */
.site-footer {
    background-color: var(--primary-dark);
    color: rgba(255, 255, 255, 0.8);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}

.footer-logo .logo-icon {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
}

.footer-logo .logo-text {
    font-size: 20px;
    font-weight: 700;
    color: white;
}

.footer-desc {
    font-size: 14px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 20px;
}

.footer-phone {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--accent-light);
    font-size: 15px;
}

.footer-phone:hover {
    color: white;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.footer-title {
    font-size: 16px;
    font-weight: 600;
    color: white;
    margin-bottom: 20px;
}

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

.footer-column ul li a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

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

.group-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.group-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    display: block;
}

.group-links a:hover {
    color: white;
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.copyright p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.8;
    margin-bottom: 8px;
}

.disclaimer {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
}

/* 回到顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(30, 136, 229, 0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(30, 136, 229, 0.5);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .about-wrapper {
        grid-template-columns: 1fr;
    }
    
    .about-stats-card {
        position: static;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cta-box {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 26px;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background-color: white;
        flex-direction: column;
        align-items: stretch;
        padding: 70px 24px 24px;
        box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
        transition: right 0.3s ease;
        z-index: 1001;
        gap: 0;
        overflow-y: auto;
    }
    
    .main-nav.open {
        right: 0;
    }
    
    .menu-close {
        display: block;
        position: absolute;
        top: 20px;
        right: 20px;
    }
    
    .nav-list {
        flex-direction: column;
        gap: 4px;
        margin-bottom: 24px;
    }
    
    .nav-link {
        padding: 12px 16px;
    }
    
    .nav-actions {
        flex-direction: column;
    }
    
    .nav-actions .btn {
        width: 100%;
    }
    
    .hero {
        padding: 120px 0 80px;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-actions .btn {
        width: 100%;
    }
    
    .platforms-grid {
        grid-template-columns: 1fr;
    }
    
    .device-tabs {
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 8px;
    }
    
    .device-tab {
        flex-shrink: 0;
    }
    
    .download-item {
        flex-direction: column;
    }
    
    .download-actions {
        width: 100%;
        align-items: stretch;
    }
    
    .source-note {
        text-align: left;
    }
    
    .features-grid,
    .security-grid {
        grid-template-columns: 1fr;
    }
    
    .services-list ul {
        grid-template-columns: 1fr;
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
    
    .related-links {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .article-actions {
        flex-direction: column;
    }
    
    .article-actions .btn {
        width: 100%;
    }
    
    .cta-box {
        padding: 32px 24px;
    }
    
    .cta-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .cta-actions .btn {
        width: 100%;
    }
    
    .article-title {
        font-size: 24px;
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
    }
}

/* 减少动画偏好设置 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* 遮罩层 */
.nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

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