/* ========== 全局变量与重置 ========== */
:root {
    --primary: #0066ff;
    --primary-light: #00a8ff;
    --primary-dark: #0044cc;
    --accent: #00e5ff;
    --bg-dark: #050d1a;
    --bg-darker: #030810;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(0, 168, 255, 0.08);
    --border: rgba(0, 168, 255, 0.15);
    --border-hover: rgba(0, 229, 255, 0.4);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.45);
    --gradient: linear-gradient(135deg, #0066ff 0%, #00e5ff 100%);
    --gradient-text: linear-gradient(135deg, #00a8ff 0%, #00e5ff 50%, #66ddff 100%);
    --shadow-glow: 0 0 40px rgba(0, 168, 255, 0.3);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

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

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 168, 255, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 168, 255, 0.08) 1px, transparent 1px);
    background-size: 60px 60px;
    z-index: 0;
    pointer-events: none;
}

.global-bg {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.global-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.25;
}

.global-glow.glow-1 {
    width: 500px;
    height: 500px;
    background: var(--primary);
    top: -100px;
    left: -100px;
    animation: floatGlow 12s ease-in-out infinite;
}

.global-glow.glow-2 {
    width: 450px;
    height: 450px;
    background: var(--accent);
    bottom: -50px;
    right: -50px;
    animation: floatGlow 15s ease-in-out infinite reverse;
}

body > * {
    position: relative;
    z-index: 1;
}

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

ul {
    list-style: none;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========== 导航栏 ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(5, 13, 26, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 14px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 19px;
    font-weight: 700;
    letter-spacing: 0.5px;
    position: relative;
    min-width: 0;
}

.logo picture {
    display: block;
    width: 38px;
    height: 38px;
    flex-shrink: 0;
}

.logo-img {
    width: 38px;
    height: 38px;
    border-radius: 8px;
}

.logo-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    white-space: nowrap;
}

.nav-menu {
    display: flex;
    gap: 22px;
}

.nav-link {
    font-size: 14px;
    color: var(--text-secondary);
    position: relative;
    transition: var(--transition);
    padding: 6px 0;
    white-space: nowrap;
}

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

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

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

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

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

.nav-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 999;
}

.nav-backdrop.show {
    display: block;
}

body.nav-open {
    overflow: hidden;
}

/* ========== Hero 首屏 ========== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding-top: 80px;
}

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

.grid-bg {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 168, 255, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 168, 255, 0.06) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

.glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.5;
}

.glow-1 {
    width: 500px;
    height: 500px;
    background: var(--primary);
    top: -100px;
    left: -100px;
    animation: floatGlow 8s ease-in-out infinite;
}

.glow-2 {
    width: 400px;
    height: 400px;
    background: var(--accent);
    bottom: -50px;
    right: -50px;
    animation: floatGlow 10s ease-in-out infinite reverse;
}

@keyframes floatGlow {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(50px, 30px) scale(1.1); }
}

.particles {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--accent);
    border-radius: 50%;
    opacity: 0.6;
    animation: particleFloat linear infinite;
}

@keyframes particleFloat {
    0% { transform: translateY(100vh) scale(0); opacity: 0; }
    10% { opacity: 0.6; }
    90% { opacity: 0.6; }
    100% { transform: translateY(-10vh) scale(1); opacity: 0; }
}

.hero-content {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    background: rgba(0, 168, 255, 0.1);
    border: 1px solid var(--border);
    border-radius: 50px;
    font-size: 13px;
    color: var(--primary-light);
    margin-bottom: 28px;
    animation: fadeInUp 0.8s ease;
}

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

@keyframes pulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(0, 229, 255, 0.5); }
    50% { opacity: 0.7; box-shadow: 0 0 0 8px rgba(0, 229, 255, 0); }
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease 0.1s both;
}

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

.hero-subtitle {
    font-size: 17px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 540px;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 0;
    animation: fadeInUp 0.8s ease 0.3s both;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient);
    color: #fff;
    box-shadow: 0 4px 20px rgba(0, 102, 255, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 102, 255, 0.6);
}

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

.btn-outline:hover {
    background: rgba(0, 168, 255, 0.1);
    border-color: var(--accent);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
}

.btn:disabled,
.btn-primary:disabled,
.btn-primary:disabled:hover {
    opacity: 0.65;
    cursor: not-allowed;
    transform: none;
    box-shadow: 0 4px 20px rgba(0, 102, 255, 0.4);
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeIn 1s ease 0.3s both;
}

.hero-logo-wrap {
    position: relative;
    width: 380px;
    height: 380px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-logo-float {
    position: relative;
    z-index: 2;
    animation: float 6s ease-in-out infinite;
}

.hero-logo-float picture {
    display: block;
}

.hero-logo {
    width: 240px;
    height: 240px;
    filter: drop-shadow(0 0 60px rgba(0, 168, 255, 0.5));
    z-index: 2;
}

.float {
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.orbit {
    position: absolute;
    border: 1px solid var(--border);
    border-radius: 50%;
}

.orbit-1 {
    width: 280px;
    height: 280px;
    animation: rotate 20s linear infinite;
    border-top-color: var(--accent);
}

.orbit-2 {
    width: 340px;
    height: 340px;
    animation: rotate 30s linear infinite reverse;
    border-right-color: var(--primary-light);
}

.orbit-3 {
    width: 380px;
    height: 380px;
    animation: rotate 40s linear infinite;
    border-bottom-color: rgba(0, 229, 255, 0.3);
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.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;
    z-index: 1;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--accent), transparent);
    animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    51% { transform: scaleY(1); transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ========== 通用 Section ========== */
.section {
    padding: 120px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 72px;
}

.section-tag {
    display: inline-block;
    font-size: 13px;
    letter-spacing: 3px;
    color: var(--primary-light);
    font-weight: 600;
    margin-bottom: 12px;
}

.section-title {
    font-size: 40px;
    font-weight: 800;
    margin-bottom: 16px;
}

.section-line {
    width: 60px;
    height: 3px;
    background: var(--gradient);
    margin: 0 auto 20px;
    border-radius: 3px;
}

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

/* ========== 关于我们 ========== */
.about {
    background: rgba(3, 8, 16, 0.25);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 60px;
    align-items: center;
}

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

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-size: 15px;
}

.about-features {
    margin-top: 32px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

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

.feature-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    background: rgba(0, 168, 255, 0.1);
    border: 1px solid var(--border);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-light);
}

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

.feature-item h4 {
    font-size: 17px;
    margin-bottom: 4px;
}

.feature-item p {
    font-size: 14px;
    color: var(--text-muted);
    margin: 0;
}

.about-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.about-card-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    background: rgba(0, 0, 0, 0.2);
}

.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: 12px;
    font-size: 13px;
    color: var(--text-muted);
}

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

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

.tech-group:last-child {
    margin-bottom: 0;
}

.tech-group h4 {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 10px;
}

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

.tech-tag {
    display: inline-block;
    padding: 5px 12px;
    font-size: 13px;
    color: var(--primary-light);
    border: 1px solid var(--border);
    border-radius: 50px;
    background: rgba(0, 168, 255, 0.08);
}

.about-highlights {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 56px;
    padding-top: 40px;
    border-top: 1px solid var(--border);
}

.about-highlight-item {
    text-align: center;
}

.about-highlight-item h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 6px;
}

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

/* ========== 核心服务 ========== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.service-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 22px;
    transition: var(--transition);
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    box-shadow: var(--shadow-glow);
}

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

.service-card.featured {
    border-color: var(--border-hover);
    background: linear-gradient(180deg, rgba(0, 168, 255, 0.06) 0%, var(--bg-card) 100%);
}

.service-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 4px 12px;
    background: var(--gradient);
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
    color: #fff;
}

.service-icon {
    width: 60px;
    height: 60px;
    background: rgba(0, 168, 255, 0.1);
    border: 1px solid var(--border);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: var(--primary-light);
}

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

.service-card h3 {
    font-size: 18px;
    margin-bottom: 12px;
    line-height: 1.4;
}

.service-card > p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 20px;
}

.service-list {
    margin-bottom: 28px;
}

.service-list li {
    font-size: 14px;
    color: var(--text-muted);
    padding: 6px 0;
    padding-left: 20px;
    position: relative;
}

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

.service-link {
    font-size: 14px;
    color: var(--primary-light);
    font-weight: 600;
    transition: var(--transition);
}

.service-link:hover {
    color: var(--accent);
    letter-spacing: 1px;
}

/* ========== 核心产品 ========== */
.products {
    background: rgba(3, 8, 16, 0.18);
}

.product-showcase {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 48px;
    align-items: center;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 48px 44px;
    backdrop-filter: blur(10px);
}

.product-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.product-logo-wrap {
    position: relative;
    width: 300px;
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-logo-wrap .orbit-1 { width: 220px; height: 220px; }
.product-logo-wrap .orbit-2 { width: 260px; height: 260px; }
.product-logo-wrap .orbit-3 { width: 300px; height: 300px; }

.product-logo-float {
    position: relative;
    z-index: 2;
    animation: float 6s ease-in-out infinite;
}

.product-logo {
    width: 180px;
    height: 180px;
    filter: drop-shadow(0 0 40px rgba(0, 168, 255, 0.5));
}

.product-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
    padding: 6px 14px;
    border: 1px solid var(--border);
    border-radius: 50px;
    background: rgba(0, 168, 255, 0.1);
    color: var(--primary-light);
    font-size: 13px;
}

.product-badge i {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 4px rgba(0, 229, 255, 0.18);
}

.product-copy h3 {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 8px;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.product-sub {
    font-size: 18px;
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 16px;
}

.product-copy > p:not(.product-sub) {
    color: var(--text-secondary);
    font-size: 15px;
    margin-bottom: 24px;
}

.product-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 28px;
}

.product-tags span {
    padding: 5px 12px;
    font-size: 13px;
    color: var(--primary-light);
    border: 1px solid var(--border);
    border-radius: 50px;
    background: rgba(0, 168, 255, 0.08);
}

.product-caps {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
    margin-top: 32px;
}

.product-cap {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 18px;
    transition: var(--transition);
}

.product-cap:hover {
    transform: translateY(-6px);
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    box-shadow: var(--shadow-glow);
}

.product-cap h4 {
    font-size: 16px;
    margin-bottom: 8px;
}

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

/* ========== 技术优势 ========== */
.advantages {
    background: rgba(3, 8, 16, 0.25);
}

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

.adv-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px 30px;
    transition: var(--transition);
    position: relative;
}

.adv-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    background: var(--bg-card-hover);
}

.adv-num {
    font-size: 42px;
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 16px;
    opacity: 0.8;
}

.adv-card h3 {
    font-size: 19px;
    margin-bottom: 10px;
}

.adv-card p {
    font-size: 14px;
    color: var(--text-muted);
}

/* ========== 案例展示 ========== */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.case-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
}

.case-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-glow);
}

.case-img {
    height: 220px;
    position: relative;
    overflow: hidden;
}

.case-img-1 {
    background: linear-gradient(135deg, #0a1628 0%, #003366 50%, #0066aa 100%);
}

.case-img-2 {
    background: linear-gradient(135deg, #0a1628 0%, #004d4d 50%, #008080 100%);
}

.case-img-3 {
    background: linear-gradient(135deg, #0a1628 0%, #1a0033 50%, #4d0080 100%);
}

.case-img::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 30% 40%, rgba(0, 229, 255, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 70% 60%, rgba(0, 102, 255, 0.2) 0%, transparent 50%);
}

.case-img svg {
    position: absolute;
    inset: 0;
    margin: auto;
    width: 56px;
    height: 56px;
    color: rgba(0, 229, 255, 0.55);
    z-index: 1;
    pointer-events: none;
}

.case-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: flex-start;
    padding: 20px;
    z-index: 1;
}

.case-tag {
    padding: 6px 14px;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: 50px;
    font-size: 12px;
    color: var(--accent);
}

.case-info {
    padding: 28px;
}

.case-info h3 {
    font-size: 19px;
    margin-bottom: 10px;
}

.case-info p {
    font-size: 14px;
    color: var(--text-muted);
}

/* ========== 联系我们 ========== */
.contact {
    background: rgba(3, 8, 16, 0.25);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: 48px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.contact-item {
    display: flex;
    gap: 18px;
    align-items: flex-start;
}

.contact-icon {
    width: 52px;
    height: 52px;
    min-width: 52px;
    background: rgba(0, 168, 255, 0.1);
    border: 1px solid var(--border);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-light);
}

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

.contact-item h4 {
    font-size: 16px;
    margin-bottom: 4px;
}

.contact-item p {
    font-size: 14px;
    color: var(--text-muted);
}

.contact-item p a {
    color: inherit;
    transition: color 0.2s ease;
}

.contact-item p a:hover {
    color: var(--primary-light);
}

.contact-form {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

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

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

.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);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.1);
}

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

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

.form-tip {
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 14px;
}

.form-status {
    min-height: 1.4em;
    margin-top: 12px;
    font-size: 14px;
    text-align: center;
}

.form-status.success {
    color: #69f0ae;
}

.form-status.error {
    color: #ff8a80;
}

.form-honey {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
    padding: 0;
}

/* ========== 页脚 ========== */
.footer {
    background: rgba(3, 8, 16, 0.8);
    border-top: 1px solid var(--border);
    padding: 60px 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 14px;
    margin-top: 16px;
    line-height: 1.8;
}

.footer-logo {
    margin-bottom: 8px;
}

.footer-col h4 {
    font-size: 16px;
    margin-bottom: 18px;
    color: var(--text-primary);
}

.footer-col a {
    display: block;
    font-size: 14px;
    color: var(--text-muted);
    padding: 6px 0;
    transition: var(--transition);
}

.footer-col a:hover {
    color: var(--accent);
    padding-left: 4px;
}

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    font-size: 13px;
    color: var(--text-muted);
}

.footer-beian {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px 20px;
}

.footer-beian a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s ease;
}

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

.beian-gongan {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.beian-gongan-icon {
    flex-shrink: 0;
    width: 16px;
    height: 16px;
    display: block;
    object-fit: contain;
}

/* ========== 返回顶部 ========== */
.back-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--gradient);
    border: none;
    border-radius: 50%;
    color: #fff;
    font-size: 20px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
    box-shadow: 0 4px 20px rgba(0, 102, 255, 0.4);
}

.back-top.show {
    opacity: 1;
    visibility: visible;
}

.back-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 102, 255, 0.6);
}

/* ========== 动画 ========== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========== 响应式 ========== */
@media (max-width: 1100px) {
    .services-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
    .service-card { padding: 36px 28px; }
    .service-card h3 { font-size: 20px; }
    .about-highlights { grid-template-columns: repeat(2, 1fr); }
    .product-caps { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 1024px) {
    .hero-title { font-size: 44px; }
    .hero-content { grid-template-columns: 1fr; gap: 40px; text-align: center; }
    .hero-subtitle { margin-left: auto; margin-right: auto; }
    .hero-actions { justify-content: center; }
    .hero-logo-wrap { width: 300px; height: 300px; }
    .hero-logo { width: 180px; height: 180px; }
    .about-grid, .contact-grid, .product-showcase { grid-template-columns: 1fr; gap: 40px; }
    .advantages-grid, .cases-grid { grid-template-columns: repeat(2, 1fr); }
    .product-caps { grid-template-columns: repeat(2, 1fr); }
    .product-copy { text-align: center; }
    .product-tags { justify-content: center; }
    .product-copy .btn { margin-left: auto; margin-right: auto; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .section { padding: 80px 0; }
    .section-title { font-size: 30px; }
    .hero { min-height: auto; padding: 110px 0 48px; }
    .hero-title { font-size: 34px; }
    .scroll-hint { display: none; }
    .about-highlights { grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 40px; padding-top: 28px; }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        max-width: 300px;
        height: 100vh;
        background: rgba(5, 13, 26, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 100px 32px 32px;
        gap: 24px;
        transition: right 0.4s ease;
        border-left: 1px solid var(--border);
        z-index: 1000;
    }
    .nav-menu.open { right: 0; }
    .logo { font-size: 16px; letter-spacing: 0; }
    .menu-toggle { display: flex; z-index: 1001; flex-shrink: 0; }
    .menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
    .menu-toggle.active span:nth-child(2) { opacity: 0; }
    .menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

    .services-grid, .advantages-grid, .cases-grid, .product-caps { grid-template-columns: 1fr; }
    .product-showcase { padding: 32px 22px; }
    .form-row { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
    .hero-logo-wrap { width: 260px; height: 260px; }
    .orbit-1 { width: 200px; height: 200px; }
    .orbit-2 { width: 240px; height: 240px; }
    .orbit-3 { width: 260px; height: 260px; }
}

@media (max-width: 480px) {
    .logo { font-size: 15px; gap: 8px; }
    .hero-title { font-size: 28px; }
    .hero-actions { flex-direction: column; width: 100%; }
    .btn { width: 100%; }
    .contact-form { padding: 24px; }
}

@media (min-width: 769px) {
    .nav-backdrop { display: none !important; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }

    .global-glow,
    .glow,
    .badge-dot,
    .hero-badge,
    .hero-title,
    .hero-subtitle,
    .hero-actions,
    .hero-visual,
    .hero-logo-float,
    .product-logo-float,
    .orbit,
    .orbit-1,
    .orbit-2,
    .orbit-3,
    .scroll-line,
    .particle {
        animation: none !important;
    }

    .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .particles {
        display: none;
    }

    .service-card,
    .adv-card,
    .case-card,
    .product-cap,
    .btn,
    .back-top {
        transition: none;
    }

    .service-card:hover,
    .adv-card:hover,
    .case-card:hover,
    .product-cap:hover,
    .btn-primary:hover,
    .btn-outline:hover,
    .back-top:hover {
        transform: none;
    }
}