/* ==================== 基础变量 ==================== */
:root {
    --bg-primary: #060818;
    --bg-secondary: #0a0e27;
    --bg-card: rgba(15, 23, 42, 0.6);
    --bg-card-hover: rgba(30, 41, 59, 0.8);
    --accent-cyan: #00d4ff;
    --accent-blue: #0ea5e9;
    --accent-purple: #7c3aed;
    --accent-purple-light: #a855f7;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: rgba(0, 212, 255, 0.15);
    --border-hover: rgba(0, 212, 255, 0.4);
    --gradient-cyan: linear-gradient(135deg, #00d4ff 0%, #0ea5e9 100%);
    --gradient-purple: linear-gradient(135deg, #7c3aed 0%, #a855f7 100%);
    --gradient-mix: linear-gradient(135deg, #00d4ff 0%, #7c3aed 100%);
    --glow-cyan: 0 0 30px rgba(0, 212, 255, 0.3);
    --glow-purple: 0 0 30px rgba(124, 58, 237, 0.3);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    position: relative;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
}

/* ==================== 粒子背景 ==================== */
#particleCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ==================== 通用容器 ==================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

.section {
    position: relative;
    z-index: 1;
    padding: 100px 0;
}

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
    background: rgba(6, 8, 24, 0.5);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    padding: 10px 0;
    background: rgba(6, 8, 24, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    filter: drop-shadow(0 0 8px rgba(0, 212, 255, 0.4));
    animation: logoPulse 4s ease-in-out infinite;
}

.logo-icon img {
    width: 36px;
    height: 36px;
    object-fit: contain;
    display: block;
}

@keyframes logoPulse {
    0%, 100% { filter: drop-shadow(0 0 8px rgba(0, 212, 255, 0.4)); }
    50% { filter: drop-shadow(0 0 16px rgba(124, 58, 237, 0.6)); }
}

.logo-text {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-sub {
    font-size: 10px;
    font-weight: 400;
    color: var(--accent-cyan);
    letter-spacing: 2px;
}

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

.nav-link {
    padding: 8px 20px;
    font-size: 15px;
    color: var(--text-secondary);
    border-radius: 8px;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--text-primary);
    background: rgba(0, 212, 255, 0.08);
}

.nav-link.active {
    color: var(--accent-cyan);
    background: rgba(0, 212, 255, 0.1);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--gradient-cyan);
    border-radius: 2px;
}

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

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

.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 首页 ==================== */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-bg-grid {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 30%, transparent 70%);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: 0 24px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 100px;
    font-size: 14px;
    color: var(--accent-cyan);
    margin-bottom: 32px;
    backdrop-filter: blur(10px);
}

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

@keyframes pulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(0, 212, 255, 0.5); }
    50% { opacity: 0.6; box-shadow: 0 0 0 8px rgba(0, 212, 255, 0); }
}

.hero-title {
    font-size: 64px;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.gradient-text {
    background: var(--gradient-cyan);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.gradient-text-2 {
    background: var(--gradient-purple);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 80px;
}

/* ==================== 按钮 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 15px;
    font-weight: 600;
    border-radius: 12px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-mix);
    color: #fff;
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 212, 255, 0.4);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn-primary:hover::before {
    left: 100%;
}

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

.btn-outline:hover {
    background: rgba(0, 212, 255, 0.08);
    border-color: var(--accent-cyan);
}

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

/* ==================== Hero 数据 ==================== */
.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
}

.stat-item {
    text-align: center;
    padding: 0 28px;
}

.stat-number {
    font-size: 36px;
    font-weight: 800;
    background: var(--gradient-cyan);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.2;
}

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

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border-color);
}

/* ==================== 滚动提示 ==================== */
.scroll-hint {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 12px;
    animation: bounce 2s infinite;
}

.mouse {
    width: 22px;
    height: 36px;
    border: 2px solid var(--text-muted);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    padding-top: 6px;
}

.wheel {
    width: 3px;
    height: 8px;
    background: var(--accent-cyan);
    border-radius: 2px;
    animation: wheelMove 1.5s infinite;
}

@keyframes wheelMove {
    0% { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(10px); }
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-8px); }
}

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

.section-tag {
    display: inline-block;
    font-size: 13px;
    letter-spacing: 3px;
    color: var(--accent-cyan);
    margin-bottom: 16px;
    font-weight: 600;
}

.section-title {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ==================== 核心业务 ==================== */
.features-section {
    padding-top: 60px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 36px 28px;
    transition: var(--transition);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--gradient-mix);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s;
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), var(--glow-cyan);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.08);
    border-radius: 14px;
    color: var(--accent-cyan);
    margin-bottom: 24px;
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    background: rgba(124, 58, 237, 0.1);
    color: var(--accent-purple-light);
    transform: scale(1.1);
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
}

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

/* ==================== 关于我们 ==================== */
.about-section {
    background: linear-gradient(180deg, transparent 0%, rgba(10, 14, 39, 0.5) 50%, transparent 100%);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    margin-bottom: 80px;
}

.about-text h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 20px;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.9;
}

.about-values {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 32px;
}

.value-item {
    display: flex;
    gap: 14px;
    align-items: flex-start;
}

.value-icon {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.08);
    border-radius: 10px;
    color: var(--accent-cyan);
}

.value-item h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 4px;
}

.value-item p {
    font-size: 13px;
    color: var(--text-muted);
    margin: 0;
}

/* About visual card */
.about-visual {
    position: relative;
}

.about-card-glow {
    position: absolute;
    top: -20px;
    right: -20px;
    width: 200px;
    height: 200px;
    background: var(--gradient-mix);
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.3;
}

.about-card {
    background: rgba(10, 14, 39, 0.8);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    overflow: hidden;
    backdrop-filter: blur(20px);
    position: relative;
    z-index: 1;
}

.about-card-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 18px;
    background: rgba(0, 0, 0, 0.3);
    border-bottom: 1px solid var(--border-color);
}

.card-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.card-dot.red { background: #ff5f57; }
.card-dot.yellow { background: #febc2e; }
.card-dot.green { background: #28c840; }

.card-title {
    margin-left: 8px;
    font-size: 13px;
    color: var(--text-muted);
}

.about-card-body {
    padding: 28px;
}

.tech-stack {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 24px;
}

.tech-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.tech-label {
    width: 70px;
    font-size: 13px;
    color: var(--accent-cyan);
    font-weight: 600;
}

.tech-bar {
    flex: 1;
    height: 6px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 3px;
    overflow: hidden;
}

.tech-fill {
    display: block;
    height: 100%;
    width: var(--w);
    background: var(--gradient-mix);
    border-radius: 3px;
    transform: scaleX(0);
    transform-origin: left;
    animation: fillBar 1.5s ease forwards;
    animation-delay: 0.3s;
}

@keyframes fillBar {
    to { transform: scaleX(1); }
}

.tech-pct {
    width: 36px;
    text-align: right;
    font-size: 12px;
    color: var(--text-muted);
}

.about-tagline {
    text-align: center;
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    padding: 16px;
    background: rgba(0, 212, 255, 0.05);
    border-radius: 10px;
    border: 1px dashed var(--border-color);
}

.tagline-bracket {
    color: var(--accent-cyan);
}

/* ==================== 时间线 ==================== */
.timeline-section {
    margin-top: 40px;
}

.timeline-heading {
    text-align: center;
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 48px;
}

.timeline {
    position: relative;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.timeline-line {
    position: absolute;
    top: 12px;
    left: 12%;
    right: 12%;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
    opacity: 0.3;
}

.timeline-item {
    position: relative;
    text-align: center;
    padding-top: 40px;
}

.timeline-dot {
    position: absolute;
    top: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 18px;
    height: 18px;
    background: var(--bg-primary);
    border: 3px solid var(--accent-cyan);
    border-radius: 50%;
    z-index: 1;
    transition: var(--transition);
}

.timeline-item:hover .timeline-dot {
    background: var(--accent-cyan);
    box-shadow: 0 0 16px rgba(0, 212, 255, 0.6);
}

.timeline-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 24px 20px;
    transition: var(--transition);
}

.timeline-item:hover .timeline-content {
    border-color: var(--border-hover);
    transform: translateY(-4px);
}

.timeline-year {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    color: var(--accent-cyan);
    background: rgba(0, 212, 255, 0.1);
    padding: 2px 12px;
    border-radius: 100px;
    margin-bottom: 12px;
}

.timeline-content h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
}

.timeline-content p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ==================== 产品服务 ==================== */
.services-section {
    background: linear-gradient(180deg, transparent 0%, rgba(10, 14, 39, 0.3) 100%);
}

.service-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 80px;
    position: relative;
    padding: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

.service-block:hover {
    border-color: var(--border-hover);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.service-block.reverse .service-content {
    order: 2;
}

.service-block.reverse .service-visual {
    order: 1;
}

.service-number {
    position: absolute;
    top: 24px;
    right: 32px;
    font-size: 80px;
    font-weight: 900;
    color: rgba(0, 212, 255, 0.05);
    line-height: 1;
    pointer-events: none;
}

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

.service-icon-large {
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.06);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    color: var(--accent-cyan);
    margin-bottom: 24px;
}

.service-content h3 {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 16px;
}

.service-desc {
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 24px;
}

.service-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tag {
    padding: 6px 16px;
    font-size: 13px;
    color: var(--text-secondary);
    background: rgba(0, 212, 255, 0.06);
    border: 1px solid var(--border-color);
    border-radius: 100px;
    transition: var(--transition);
}

.tag:hover {
    color: var(--accent-cyan);
    border-color: var(--border-hover);
    background: rgba(0, 212, 255, 0.12);
}

/* Service visuals */
.service-visual-card {
    height: 320px;
    border-radius: var(--radius);
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    overflow: hidden;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* IoT Visual */
.iot-visual {
    position: relative;
}

.iot-visual .node {
    position: absolute;
    padding: 8px 16px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid var(--accent-cyan);
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--accent-cyan);
    backdrop-filter: blur(10px);
    z-index: 2;
}

.iot-visual .node-center {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(124, 58, 237, 0.15);
    border-color: var(--accent-purple);
    color: var(--accent-purple-light);
    box-shadow: var(--glow-purple);
}

.iot-visual .node-1 { top: 15%; left: 12%; }
.iot-visual .node-2 { top: 15%; right: 12%; }
.iot-visual .node-3 { bottom: 15%; left: 12%; }
.iot-visual .node-4 { bottom: 15%; right: 12%; }

.connection-lines {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* AI Visual */
.ai-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    width: 80%;
}

.ai-cell {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    font-size: 18px;
    font-weight: 700;
    color: var(--accent-cyan);
    transition: var(--transition);
    animation: aiCellGlow 3s ease-in-out infinite;
}

.ai-cell:nth-child(odd) {
    color: var(--accent-purple-light);
}

.ai-cell:nth-child(1) { animation-delay: 0s; }
.ai-cell:nth-child(2) { animation-delay: 0.2s; }
.ai-cell:nth-child(3) { animation-delay: 0.4s; }
.ai-cell:nth-child(4) { animation-delay: 0.6s; }
.ai-cell:nth-child(5) { animation-delay: 0.8s; }
.ai-cell:nth-child(6) { animation-delay: 1s; }
.ai-cell:nth-child(7) { animation-delay: 1.2s; }
.ai-cell:nth-child(8) { animation-delay: 1.4s; }
.ai-cell:nth-child(9) { animation-delay: 1.6s; }

@keyframes aiCellGlow {
    0%, 100% { box-shadow: none; transform: scale(1); }
    50% { box-shadow: 0 0 20px rgba(0, 212, 255, 0.3); transform: scale(1.05); }
}

/* Dev Visual */
.code-window {
    width: 90%;
    background: #0d1117;
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.code-header {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 14px;
    background: #161b22;
    border-bottom: 1px solid var(--border-color);
}

.code-header .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.dot.r { background: #ff5f57; }
.dot.y { background: #febc2e; }
.dot.g { background: #28c840; }

.code-filename {
    margin-left: 8px;
    font-size: 12px;
    color: var(--text-muted);
    font-family: monospace;
}

.code-body {
    padding: 18px;
    font-size: 13px;
    font-family: "Cascadia Code", "Fira Code", "Consolas", monospace;
    line-height: 1.7;
    color: var(--text-secondary);
    overflow-x: auto;
}

.ck { color: #ff7b72; }
.cv { color: #79c0ff; }
.cf { color: #d2a8ff; }
.cs { color: #a5d6ff; }

/* Web Visual */
.browser-mockup {
    width: 90%;
    background: #0d1117;
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.browser-bar {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 14px;
    background: #161b22;
    border-bottom: 1px solid var(--border-color);
}

.browser-url {
    flex: 1;
    margin-left: 8px;
    padding: 4px 12px;
    background: #0d1117;
    border-radius: 6px;
    font-size: 11px;
    color: var(--text-muted);
    font-family: monospace;
}

.browser-content {
    padding: 16px;
}

.bc-hero {
    height: 60px;
    background: var(--gradient-mix);
    border-radius: 8px;
    margin-bottom: 12px;
    opacity: 0.7;
}

.bc-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.bc-card {
    height: 50px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 6px;
}

/* ==================== 服务流程 ==================== */
.process-section {
    margin-top: 40px;
    text-align: center;
}

.process-heading {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 48px;
}

.process-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.process-step {
    text-align: center;
    width: 180px;
}

.step-circle {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 2px solid var(--accent-cyan);
    border-radius: 50%;
    font-size: 20px;
    font-weight: 800;
    color: var(--accent-cyan);
    transition: var(--transition);
}

.process-step:hover .step-circle {
    background: var(--gradient-mix);
    color: #fff;
    transform: scale(1.1);
    box-shadow: var(--glow-cyan);
}

.process-step h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 6px;
}

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

.process-arrow {
    font-size: 24px;
    color: var(--accent-cyan);
    opacity: 0.5;
}

/* ==================== 联系我们 ==================== */
.contact-section {
    background: linear-gradient(180deg, transparent 0%, rgba(10, 14, 39, 0.5) 100%);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 48px;
}

.contact-info h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 12px;
}

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

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 32px;
}

.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact-icon {
    width: 44px;
    height: 44px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--accent-cyan);
}

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

.contact-value {
    display: block;
    font-size: 15px;
    color: var(--text-primary);
    font-weight: 500;
}

.contact-quick {
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
}

.quick-label {
    font-size: 14px;
    color: var(--text-muted);
    display: block;
    margin-bottom: 12px;
}

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

.quick-tag {
    padding: 6px 14px;
    font-size: 13px;
    color: var(--accent-cyan);
    background: rgba(0, 212, 255, 0.06);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: default;
    transition: var(--transition);
}

.quick-tag:hover {
    background: rgba(0, 212, 255, 0.12);
}

/* Contact Form */
.contact-form-wrap {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 40px;
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.contact-form-wrap::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-mix);
}

.contact-form h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 24px;
}

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

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

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

.required {
    color: #ef4444;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
}

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

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
    background: rgba(0, 0, 0, 0.5);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2300d4ff' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}

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

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

.form-note {
    font-size: 12px;
    color: var(--text-muted);
    text-align: center;
    margin-top: 16px;
}

/* ==================== 页脚 ==================== */
.footer {
    background: rgba(6, 8, 24, 0.8);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 24px;
    position: relative;
    z-index: 1;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 48px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

.footer-logo span {
    font-size: 18px;
    font-weight: 700;
}

.footer-logo img {
    display: block;
    object-fit: contain;
}

.footer-brand p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 320px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.footer-col h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.footer-col a,
.footer-col span {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 10px;
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    font-size: 13px;
    color: var(--text-muted);
}

/* ==================== 回到顶部 ==================== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border-hover);
    border-radius: 12px;
    color: var(--accent-cyan);
    cursor: pointer;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

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

.back-to-top:hover {
    background: var(--gradient-mix);
    color: #fff;
    box-shadow: var(--glow-cyan);
}

/* ==================== Toast ==================== */
.toast {
    position: fixed;
    top: 100px;
    right: 32px;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 24px;
    background: rgba(10, 14, 39, 0.95);
    border: 1px solid var(--accent-cyan);
    border-radius: 12px;
    backdrop-filter: blur(20px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4), var(--glow-cyan);
    z-index: 2000;
    transform: translateX(120%);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.toast.show {
    transform: translateX(0);
}

.toast-icon {
    color: #28c840;
    flex-shrink: 0;
}

.toast-content {
    display: flex;
    flex-direction: column;
}

.toast-content strong {
    font-size: 15px;
    color: var(--text-primary);
}

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

/* ==================== 滚动动画 ==================== */
[data-animate] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-animate].animated {
    opacity: 1;
    transform: translateY(0);
}

/* ==================== 响应式 ==================== */
@media (max-width: 1024px) {
    .hero-title { font-size: 48px; }
    .section-title { font-size: 34px; }
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
    .about-content { grid-template-columns: 1fr; gap: 40px; }
    .service-block { grid-template-columns: 1fr; gap: 32px; }
    .service-block.reverse .service-content { order: 1; }
    .service-block.reverse .service-visual { order: 2; }
    .contact-content { grid-template-columns: 1fr; }
    .timeline { grid-template-columns: repeat(2, 1fr); }
    .timeline-line { display: none; }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 64px;
        right: 0;
        width: 100%;
        background: rgba(6, 8, 24, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px;
        gap: 4px;
        border-bottom: 1px solid var(--border-color);
        transform: translateY(-150%);
        transition: transform 0.3s;
    }

    .nav-menu.active {
        transform: translateY(0);
    }

    .nav-toggle { display: flex; }

    .hero-title { font-size: 36px; }
    .hero-desc { font-size: 15px; }
    .hero-desc br { display: none; }
    .section-title { font-size: 28px; }
    .section { padding: 60px 0; }
    .feature-grid { grid-template-columns: 1fr; }
    .hero-stats { flex-wrap: wrap; gap: 16px; }
    .stat-divider { display: none; }
    .stat-item { padding: 0 16px; }
    .stat-number { font-size: 28px; }
    .about-values { grid-template-columns: 1fr; }
    .timeline { grid-template-columns: 1fr; }
    .footer-content { grid-template-columns: 1fr; }
    .footer-links { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .service-block { padding: 24px; }
    .service-number { font-size: 56px; }
    .process-steps { flex-direction: column; }
    .process-arrow { transform: rotate(90deg); }
    .hero-actions { flex-direction: column; align-items: center; }
    .btn { width: 100%; justify-content: center; }
    .contact-form-wrap { padding: 24px; }
}