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

:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #0f1523;
    --bg-card: #131a2a;
    --bg-card-hover: #192338;
    --border-primary: #1e2a42;
    --border-accent: #00d4ff;
    --text-primary: #e6edf7;
    --text-secondary: #8899b3;
    --text-muted: #5a6d8c;
    --accent: #00d4ff;
    --accent-hover: #33ddff;
    --accent-dim: rgba(0, 212, 255, 0.1);
    --danger: #ff4757;
    --success: #2ed573;
    --warning: #ffa502;
    --font-tech: 'Rajdhani', 'Noto Sans SC', monospace;
    --font-sans: 'Noto Sans SC', -apple-system, sans-serif;
    --radius: 4px;
    --transition: all 0.25s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg-primary);
    background-image: 
        radial-gradient(circle at 20% 0%, rgba(0, 212, 255, 0.03) 0%, transparent 40%),
        radial-gradient(circle at 80% 100%, rgba(0, 212, 255, 0.02) 0%, transparent 40%);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

body.modal-open {
    overflow: hidden;
}

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

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

button {
    cursor: pointer;
    font-family: inherit;
    border: none;
    background: none;
    color: inherit;
    transition: var(--transition);
}

.container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 24px;
}

.section-block {
    padding: 90px 0;
}

.section-darker {
    background: var(--bg-secondary);
    position: relative;
}

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

.section-tag {
    font-family: var(--font-tech);
    font-size: 14px;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 2px;
    margin-bottom: 12px;
    opacity: 0.8;
}

.section-title {
    font-size: 38px;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background: var(--accent);
}

.section-desc {
    font-size: 16px;
    color: var(--text-secondary);
    margin-top: 24px;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-weight: 600;
    text-align: center;
    white-space: nowrap;
    font-family: var(--font-tech);
    letter-spacing: 0.5px;
    border: 1px solid transparent;
    transition: var(--transition);
    cursor: pointer;
    text-transform: uppercase;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 13px;
}

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

.btn-xl {
    padding: 16px 32px;
    font-size: 15px;
}

.btn-block {
    width: 100%;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg-primary);
    border-color: var(--accent);
}

.btn-primary:hover {
    background: var(--accent-hover);
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
}

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

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

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

.btn-ghost:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: var(--accent-dim);
}

/* 导航栏 */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 14, 23, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-primary);
}

.header-container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 24px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 22px;
    flex-shrink: 0;
}

.logo-icon {
    color: var(--accent);
    font-family: var(--font-tech);
    font-weight: 700;
}

.logo-text {
    font-family: var(--font-tech);
    letter-spacing: 1px;
}

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

.nav-link {
    padding: 8px 14px;
    font-size: 14px;
    font-family: var(--font-tech);
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
    position: relative;
}

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

.nav-link.active::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 14px;
    right: 14px;
    height: 2px;
    background: var(--accent);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.nav-phone-text {
    font-family: var(--font-tech);
    font-size: 14px;
    font-weight: 600;
    color: var(--accent);
}

.nav-phone-btn {
    display: none;
}

.nav-demo-mobile {
    display: none;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    width: 32px;
    padding: 8px 4px;
}

.nav-toggle span {
    display: block;
    height: 2px;
    background: var(--text-primary);
}

.nav-mobile-header {
    display: none;
}

.nav-close {
    display: none;
}

/* Hero */
.hero {
    padding: 80px 0 60px;
    position: relative;
    overflow: hidden;
}

.hero-grid-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.03;
    pointer-events: none;
}

.grid-line {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--accent);
}

.grid-line:nth-child(1) { left: 20%; }
.grid-line:nth-child(2) { left: 40%; }
.grid-line:nth-child(3) { left: 60%; }
.grid-line:nth-child(4) { left: 80%; }
.grid-line:nth-child(5) { left: 100%; }

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 6px 14px;
    background: var(--accent-dim);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: var(--radius);
    font-family: var(--font-tech);
    font-size: 12px;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 1px;
    margin-bottom: 24px;
}

.badge-glow {
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    animation: glow 2s ease-in-out infinite;
}

@keyframes glow {
    0%, 100% { opacity: 1; box-shadow: 0 0 8px var(--accent); }
    50% { opacity: 0.5; box-shadow: 0 0 16px var(--accent); }
}

.hero-title {
    font-size: 52px;
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.title-gradient {
    color: var(--accent);
    text-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
}

.hero-subtitle {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 32px;
    max-width: 520px;
}

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

.hero-contact {
    display: flex;
    align-items: center;
    gap: 12px;
    padding-top: 24px;
    border-top: 1px solid var(--border-primary);
}

.contact-label {
    font-family: var(--font-tech);
    font-size: 13px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.contact-num {
    font-family: var(--font-tech);
    font-size: 22px;
    font-weight: 700;
    color: var(--accent);
}

.hero-visual {
    position: relative;
}

.hero-banner-frame {
    position: relative;
    border: 1px solid var(--border-accent);
    padding: 4px;
}

.frame-corner {
    position: absolute;
    width: 20px;
    height: 20px;
    border-color: var(--accent);
    border-style: solid;
}

.frame-corner.tl { top: -2px; left: -2px; border-width: 2px 0 0 2px; }
.frame-corner.tr { top: -2px; right: -2px; border-width: 2px 2px 0 0; }
.frame-corner.bl { bottom: -2px; left: -2px; border-width: 0 0 2px 2px; }
.frame-corner.br { bottom: -2px; right: -2px; border-width: 0 2px 2px 0; }

.hero-banner {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
}

.hero-badges {
    display: flex;
    gap: 12px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.badge-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius);
    font-size: 13px;
    font-family: var(--font-tech);
    color: var(--text-secondary);
}

.badge-icon {
    color: var(--success);
    font-weight: 700;
}

/* 设备快捷栏 */
.devices-bar {
    padding: 20px 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-primary);
    border-bottom: 1px solid var(--border-primary);
}

.devices-row {
    display: flex;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}

.device-chip {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: var(--font-tech);
    font-weight: 600;
    color: var(--text-secondary);
}

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

.chip-icon svg {
    width: 18px;
    height: 18px;
}

.chip-warn {
    border-color: var(--warning);
    color: var(--warning);
}

.chip-warn:hover {
    border-color: var(--warning);
    color: var(--warning);
    background: rgba(255, 165, 2, 0.1);
}

.chip-phone {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--bg-primary);
}

.chip-phone:hover {
    background: var(--accent-hover);
    color: var(--bg-primary);
}

/* 平台卡片 */
.platform-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.platform-card {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius);
    padding: 28px;
    transition: var(--transition);
    position: relative;
}

.platform-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 212, 255, 0.1);
}

.platform-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--accent);
    opacity: 0;
    transition: var(--transition);
}

.platform-card:hover::before {
    opacity: 1;
    width: 80px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
}

.platform-name {
    font-size: 22px;
    font-weight: 700;
}

.platform-type {
    font-size: 11px;
    font-family: var(--font-tech);
    padding: 4px 10px;
    background: var(--accent-dim);
    color: var(--accent);
    border-radius: 2px;
    letter-spacing: 0.5px;
}

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

.platform-meta {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-primary);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.meta-label {
    font-size: 12px;
    color: var(--text-muted);
    font-family: var(--font-tech);
    min-width: 70px;
}

.meta-values {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.meta-values span {
    font-size: 11px;
    font-family: var(--font-tech);
    padding: 2px 8px;
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    color: var(--text-secondary);
}

.card-actions {
    display: flex;
    gap: 10px;
    margin-bottom: 16px;
}

.card-warn {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--warning);
    padding-top: 12px;
}

.card-warn svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

.card-warn-danger {
    color: var(--danger);
}

.card-more {
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--accent-dim) 100%);
    border-color: var(--border-accent);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.card-more-action {
    margin: 20px 0;
}

/* 下载中心 */
.device-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}

.device-card {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius);
    padding: 28px 24px;
    transition: var(--transition);
}

.device-card:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
}

.device-icon {
    width: 48px;
    height: 48px;
    background: var(--accent-dim);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--accent);
}

.device-icon svg {
    width: 24px;
    height: 24px;
}

.device-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
}

.device-card > p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.device-list {
    list-style: none;
    margin-bottom: 20px;
}

.device-list li {
    font-size: 12px;
    color: var(--text-muted);
    padding: 6px 0;
    padding-left: 18px;
    position: relative;
    font-family: var(--font-tech);
}

.device-list li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent);
}

.security-check-block {
    background: var(--bg-card);
    border: 1px solid var(--warning);
    border-radius: var(--radius);
    padding: 24px;
}

.check-title {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--warning);
}

.check-icon {
    width: 28px;
    height: 28px;
    background: var(--warning);
    color: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    border-radius: 50%;
    font-family: var(--font-tech);
}

.check-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.check-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 14px;
}

.check-mark {
    color: var(--success);
    font-weight: 700;
    flex-shrink: 0;
}

/* 功能介绍 */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 32px;
}

.feature-item {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius);
    padding: 28px;
    transition: var(--transition);
}

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

.feature-num {
    font-family: var(--font-tech);
    font-size: 28px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 16px;
    opacity: 0.6;
}

.feature-item h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
}

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

.feature-warn {
    border-color: var(--danger);
}

.feature-warn .feature-num {
    color: var(--danger);
}

.risk-alert {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px 24px;
    background: rgba(255, 71, 87, 0.08);
    border: 1px solid var(--danger);
    border-radius: var(--radius);
}

.risk-icon {
    font-size: 24px;
    flex-shrink: 0;
}

.risk-text h4 {
    color: var(--danger);
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 6px;
}

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

/* 安装流程 */
.steps-flow {
    display: flex;
    align-items: center;
    gap: 0;
    justify-content: center;
}

.step-card {
    flex: 1;
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius);
    padding: 28px 24px;
    text-align: center;
    transition: var(--transition);
}

.step-card:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
}

.step-number {
    font-family: var(--font-tech);
    font-size: 12px;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 1px;
    margin-bottom: 12px;
}

.step-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
}

.step-card p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.step-arrow {
    font-family: var(--font-tech);
    font-size: 24px;
    color: var(--accent);
    padding: 0 12px;
    opacity: 0.5;
}

/* 安全指南 */
.security-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.sec-card {
    border-radius: var(--radius);
    padding: 32px;
}

.safe-card {
    background: rgba(46, 213, 115, 0.06);
    border: 1px solid var(--success);
}

.danger-card {
    background: rgba(255, 71, 87, 0.06);
    border: 1px solid var(--danger);
}

.sec-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 24px;
}

.sec-icon {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-weight: 700;
    font-size: 14px;
}

.safe-card .sec-icon {
    background: var(--success);
    color: var(--bg-primary);
}

.danger-card .sec-icon {
    background: var(--danger);
    color: #fff;
}

.safe-card .sec-title {
    color: var(--success);
}

.danger-card .sec-title {
    color: var(--danger);
}

.sec-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.sec-list li {
    font-size: 14px;
    line-height: 1.6;
    padding-left: 24px;
    position: relative;
    color: var(--text-secondary);
}

.sec-list li::before {
    content: '▸';
    position: absolute;
    left: 0;
}

.safe-card .sec-list li::before {
    color: var(--success);
}

.danger-card .sec-list li::before {
    color: var(--danger);
}

/* 资讯列表 - 强制网格 */
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: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
}

ul.article-cards > li.article-card:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 212, 255, 0.08);
}

.article-card .card-thumb {
    width: 100%;
    overflow: hidden;
}

.article-card .card-thumb img {
    display: block;
    width: 100%;
    max-width: 100%;
    height: 180px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.article-card .card-title {
    overflow-wrap: anywhere;
    font-size: 16px;
    font-weight: 600;
    padding: 16px 16px 8px;
    line-height: 1.5;
    color: var(--text-primary);
}

.article-card .card-date {
    display: block;
    font-size: 12px;
    font-family: var(--font-tech);
    color: var(--accent);
    padding: 0 16px;
    opacity: 0.8;
}

.article-card .card-summary {
    overflow-wrap: anywhere;
    font-size: 13px;
    color: var(--text-secondary);
    padding: 8px 16px 20px;
    line-height: 1.6;
}

.news-more {
    text-align: center;
    margin-top: 48px;
}

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

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

.faq-item:hover {
    border-color: rgba(0, 212, 255, 0.3);
}

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

.faq-q {
    width: 100%;
    padding: 20px 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    text-align: left;
}

.q-num {
    font-family: var(--font-tech);
    font-size: 14px;
    font-weight: 700;
    color: var(--accent);
    min-width: 32px;
}

.q-text {
    flex: 1;
    font-size: 15px;
    font-weight: 600;
}

.q-arrow {
    width: 18px;
    height: 18px;
    color: var(--text-muted);
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

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

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

.faq-item.active .faq-a {
    max-height: 400px;
}

.faq-a p {
    padding: 0 24px 20px 72px;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* 关于我们 */
.about-wrap {
    max-width: 800px;
    margin: 0 auto;
}

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

.about-services {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-top: 32px;
}

.service-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 18px;
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius);
    font-size: 14px;
}

.service-marker {
    color: var(--accent);
    font-family: var(--font-tech);
    font-weight: 700;
}

/* 联系我们 */
.contact-wrap {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin: 20px 0 32px;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    background: var(--bg-card);
    border: 1px solid var(--accent);
    border-radius: var(--radius);
    margin-bottom: 24px;
}

.contact-card-icon {
    width: 48px;
    height: 48px;
    background: var(--accent-dim);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
}

.contact-card-icon svg {
    width: 22px;
    height: 22px;
}

.contact-card-label {
    font-size: 12px;
    color: var(--text-muted);
    font-family: var(--font-tech);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.contact-card-num {
    font-family: var(--font-tech);
    font-size: 24px;
    font-weight: 700;
    color: var(--accent);
}

.contact-notice {
    padding: 16px 20px;
    background: rgba(255, 165, 2, 0.08);
    border: 1px solid var(--warning);
    border-radius: var(--radius);
}

.contact-notice strong {
    display: block;
    color: var(--warning);
    font-size: 14px;
    margin-bottom: 6px;
}

.contact-notice p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.contact-form {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius);
    padding: 32px;
}

.form-title {
    font-family: var(--font-tech);
    font-size: 20px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 8px;
}

.form-desc {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 24px;
}

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

.input-group {
    margin-bottom: 16px;
}

.input-group label {
    display: block;
    font-size: 12px;
    font-family: var(--font-tech);
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.input-group input,
.input-group select,
.input-group textarea {
    width: 100%;
    padding: 12px 14px;
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
    color: var(--text-primary);
    transition: var(--transition);
}

.input-group input:focus,
.input-group select:focus,
.input-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-dim);
}

.input-group textarea {
    resize: vertical;
}

/* 页脚 */
.site-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-primary);
    padding-top: 60px;
}

.footer-cta {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.08) 0%, transparent 100%);
    border: 1px solid var(--border-accent);
    border-radius: var(--radius);
    padding: 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
    margin-bottom: 60px;
    position: relative;
}

.cta-corner {
    position: absolute;
    width: 16px;
    height: 16px;
    border-color: var(--accent);
    border-style: solid;
}

.cta-corner.tl { top: -1px; left: -1px; border-width: 2px 0 0 2px; }
.cta-corner.tr { top: -1px; right: -1px; border-width: 2px 2px 0 0; }
.cta-corner.bl { bottom: -1px; left: -1px; border-width: 0 0 2px 2px; }
.cta-corner.br { bottom: -1px; right: -1px; border-width: 0 2px 2px 0; }

.cta-content h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.cta-content p {
    color: var(--text-secondary);
}

.cta-btns {
    display: flex;
    gap: 12px;
    flex-shrink: 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1.5fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid var(--border-primary);
}

.footer-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 16px 0 20px;
}

.footer-notice-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    background: var(--accent-dim);
    border-radius: var(--radius);
    font-size: 12px;
    color: var(--accent);
    font-family: var(--font-tech);
}

.badge-dot {
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
}

.footer-title {
    font-family: var(--font-tech);
    font-size: 14px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 20px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

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

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

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.contact-label {
    font-size: 12px;
    color: var(--text-muted);
    font-family: var(--font-tech);
    text-transform: uppercase;
}

.contact-phone {
    font-family: var(--font-tech);
    font-size: 20px;
    font-weight: 700;
    color: var(--accent);
}

.contact-hours {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.footer-link-mini {
    font-size: 13px;
    color: var(--text-secondary);
    text-decoration: underline;
}

.footer-grouplink {
    padding: 24px 0;
    border-bottom: 1px solid var(--border-primary);
    font-size: 13px;
    color: var(--text-muted);
    line-height: 2;
}

.grouplink-title {
    font-family: var(--font-tech);
    color: var(--text-secondary);
    font-weight: 600;
    margin-right: 8px;
}

.footer-grouplink a {
    color: var(--text-secondary);
    margin: 0 6px;
}

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

.footer-bottom {
    padding: 24px 0 40px;
    text-align: center;
}

.footer-bottom p {
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1.8;
}

/* 弹窗 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

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

.modal {
    background: var(--bg-card);
    border: 1px solid var(--accent);
    border-radius: var(--radius);
    max-width: 440px;
    width: 100%;
    padding: 40px 32px 32px;
    position: relative;
    transform: scale(0.95);
    transition: transform 0.3s ease;
}

.modal-overlay.active .modal {
    transform: scale(1);
}

.modal-corner {
    position: absolute;
    width: 16px;
    height: 16px;
    border-color: var(--accent);
    border-style: solid;
}

.modal-corner.tl { top: -1px; left: -1px; border-width: 2px 0 0 2px; }
.modal-corner.tr { top: -1px; right: -1px; border-width: 2px 2px 0 0; }
.modal-corner.bl { bottom: -1px; left: -1px; border-width: 0 0 2px 2px; }
.modal-corner.br { bottom: -1px; right: -1px; border-width: 0 2px 2px 0; }

.modal-close {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--text-muted);
    border: 1px solid var(--border-primary);
}

.modal-close:hover {
    color: var(--accent);
    border-color: var(--accent);
}

.modal-title {
    font-family: var(--font-tech);
    font-size: 20px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 16px;
}

.modal-text {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 12px;
}

.modal-btn {
    width: 100%;
    margin-top: 20px;
}

/* 文章详情 */
.article-page {
    padding: 60px 0 80px;
}

.article-wrap {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius);
    padding: 48px;
    position: relative;
}

.article-corners .corner {
    position: absolute;
    width: 20px;
    height: 20px;
    border-color: var(--accent);
    border-style: solid;
}

.article-corners .tl { top: -1px; left: -1px; border-width: 2px 0 0 2px; }
.article-corners .tr { top: -1px; right: -1px; border-width: 2px 2px 0 0; }
.article-corners .bl { bottom: -1px; left: -1px; border-width: 0 0 2px 2px; }
.article-corners .br { bottom: -1px; right: -1px; border-width: 0 2px 2px 0; }

.a-breadcrumb {
    margin-bottom: 28px;
    font-size: 13px;
    color: var(--text-muted);
    font-family: var(--font-tech);
}

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

.a-header {
    margin-bottom: 32px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--border-primary);
}

.a-meta-line {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
    font-family: var(--font-tech);
    font-size: 13px;
}

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

.a-cat {
    color: var(--text-muted);
}

.a-title {
    font-size: 36px;
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 20px;
}

.a-summary {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
    padding: 16px 20px;
    background: var(--accent-dim);
    border-left: 3px solid var(--accent);
    border-radius: var(--radius);
}

.a-cover {
    margin: 0 -48px 32px;
}

.a-cover img {
    width: 100%;
}

.a-body {
    font-size: 16px;
    line-height: 1.9;
    color: var(--text-primary);
    margin-bottom: 48px;
}

.a-body p {
    margin-bottom: 20px;
}

.a-body h2 {
    font-size: 26px;
    font-weight: 700;
    margin: 40px 0 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-primary);
    color: var(--accent);
}

.a-body h3 {
    font-size: 20px;
    font-weight: 700;
    margin: 32px 0 14px;
}

.a-body ul, .a-body ol {
    margin: 20px 0;
    padding-left: 24px;
}

.a-body li {
    margin-bottom: 10px;
    color: var(--text-secondary);
}

.a-related {
    margin: 48px 0;
    padding-top: 32px;
    border-top: 1px solid var(--border-primary);
}

.related-h {
    font-family: var(--font-tech);
    font-size: 18px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 20px;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.related-item {
    display: block;
    padding: 18px;
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius);
    transition: var(--transition);
    position: relative;
}

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

.related-item h4 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 6px;
}

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

.related-arrow {
    position: absolute;
    right: 18px;
    top: 18px;
    color: var(--accent);
    font-family: var(--font-tech);
}

.a-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    padding-top: 32px;
    border-top: 1px solid var(--border-primary);
}

/* 响应式 */
@media (max-width: 1024px) {
    .hero-wrap {
        gap: 40px;
    }
    .hero-title {
        font-size: 40px;
    }
    .platform-grid,
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .device-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    .steps-flow {
        flex-wrap: wrap;
    }
    .step-arrow {
        display: none;
    }
    .step-card {
        flex: 1 1 45%;
    }
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }
    .footer-cta {
        flex-direction: column;
        text-align: center;
    }
    .cta-btns {
        width: 100%;
        flex-direction: column;
    }
    .cta-btns .btn {
        width: 100%;
    }
    .contact-wrap {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .section-block {
        padding: 60px 0;
    }
    .section-title {
        font-size: 28px;
    }
    .main-nav {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: 24px;
        gap: 0;
        z-index: 200;
        transform: translateX(100%);
        transition: transform 0.3s ease;
        overflow-y: auto;
        align-items: flex-start;
    }
    .main-nav.active {
        transform: translateX(0);
    }
    .nav-mobile-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        width: 100%;
        padding-bottom: 20px;
        margin-bottom: 20px;
        border-bottom: 1px solid var(--border-primary);
    }
    .nav-close {
        display: flex;
        width: 40px;
        height: 40px;
        align-items: center;
        justify-content: center;
        border: 1px solid var(--border-primary);
        color: var(--text-primary);
    }
    .nav-link {
        width: 100%;
        padding: 16px 0;
        font-size: 16px;
        border-bottom: 1px solid var(--border-primary);
    }
    .nav-link.active::before {
        display: none;
    }
    .nav-phone-btn {
        display: flex !important;
        margin-top: 20px;
        width: 100%;
        padding: 14px;
        justify-content: center;
        background: var(--accent);
        color: var(--bg-primary);
    }
    .nav-demo-mobile {
        display: flex;
        flex-direction: column;
        gap: 10px;
        margin-top: 16px;
        width: 100%;
    }
    .nav-demo-mobile .btn {
        width: 100%;
    }
    .nav-toggle {
        display: flex;
    }
    .nav-phone-text,
    .nav-actions .btn-ghost,
    .nav-actions .btn-primary {
        display: none;
    }
    .hero {
        padding: 40px 0;
    }
    .hero-wrap {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .hero-title {
        font-size: 32px;
    }
    .hero-actions {
        flex-direction: column;
    }
    .hero-actions .btn {
        width: 100%;
    }
    .platform-grid,
    .feature-grid,
    .device-cards,
    .security-grid,
    .about-services {
        grid-template-columns: 1fr;
    }
    .check-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
    .article-wrap {
        padding: 28px 20px;
    }
    .a-cover {
        margin: 0 -20px 24px;
    }
    .a-title {
        font-size: 26px;
    }
    .related-grid {
        grid-template-columns: 1fr;
    }
    .a-actions {
        flex-direction: column;
    }
    .a-actions .btn {
        width: 100%;
    }
    .footer-cta {
        padding: 28px 20px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}