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

:root {
    --primary: #00f0ff;
    --primary-dark: #0080ff;
    --secondary: #7b2ff7;
    --accent: #ff00aa;
    --bg-dark: #050510;
    --bg-darker: #020208;
    --bg-card: rgba(10, 20, 40, 0.6);
    --text: #ffffff;
    --text-dim: #a0b0d0;
    --text-muted: #607090;
    --border: rgba(0, 240, 255, 0.2);
    --glow: 0 0 20px rgba(0, 240, 255, 0.5);
    --glow-strong: 0 0 30px rgba(0, 240, 255, 0.8);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg-dark);
    color: var(--text);
    overflow-x: hidden;
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
}

/* ===================== 背景层 ===================== */
.bg-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(0, 240, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 240, 255, 0.05) 1px, transparent 1px);
    background-size: 50px 50px;
    z-index: -3;
    animation: grid-move 20s linear infinite;
    pointer-events: none;
}

@keyframes grid-move {
    will-change: transform; transform: translateZ(0);
    0% { transform: perspective(500px) rotateX(60deg) translateY(0); }
    100% { transform: perspective(500px) rotateX(60deg) translateY(50px); }
}

.bg-stars {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(2px 2px at 20% 30%, white, transparent),
        radial-gradient(1px 1px at 60% 70%, white, transparent),
        radial-gradient(1px 1px at 80% 10%, white, transparent),
        radial-gradient(2px 2px at 30% 80%, white, transparent),
        radial-gradient(1px 1px at 90% 50%, white, transparent),
        radial-gradient(1px 1px at 15% 60%, white, transparent),
        radial-gradient(2px 2px at 70% 20%, white, transparent),
        radial-gradient(1px 1px at 40% 90%, white, transparent);
    background-size: 200% 200%;
    z-index: -2;
    opacity: 0.6;
    animation: twinkle 4s ease-in-out infinite alternate;
    pointer-events: none;
}

@keyframes twinkle {
    will-change: opacity;
    0% { opacity: 0.4; }
    100% { opacity: 0.9; }
}

.scan-line {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
    box-shadow: 0 0 12px var(--primary);
    z-index: 9999;
    animation: scan 8s linear infinite;
    pointer-events: none;
    opacity: 0.5;
}

@keyframes scan {
    will-change: top;
    0% { top: 0; }
    100% { top: 100%; }
}

/* ===================== 导航栏 ===================== */
.navbar {
    position: relative;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 15px 0;
    background: rgba(5, 5, 16, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: opacity 0.3s, transform 0.3s, color 0.3s;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 60px;
    flex-wrap: wrap;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--primary);
}

.logo-icon {
    height: 40px;
    width: auto;
}

.logo-icon img {
    height: 100%;
    width: auto;
    object-fit: contain;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-name {
    font-size: 22px;
    font-weight: 900;
    letter-spacing: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-sub {
    font-size: 11px;
    color: var(--text-dim);
    letter-spacing: 2px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

.nav-menu > li {
    position: relative;
}

.nav-menu > li > a {
    color: var(--text-dim);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 1.5px;
    position: relative;
    transition: opacity 0.3s, transform 0.3s, color 0.3s;
    padding: 8px 0;
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-menu > li > a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transition: width 0.3s ease;
    box-shadow: var(--glow);
}

.nav-menu > li > a:hover,
.nav-menu > li > a.active {
    color: var(--primary);
}

.nav-menu > li > a:hover::before,
.nav-menu > li > a.active::before {
    width: 100%;
}

/* 二级菜单箭头 */
.nav-arrow {
    font-size: 10px;
    transition: transform 0.3s ease;
}

.nav-dropdown:hover .nav-arrow {
    transform: rotate(180deg);
}

/* 二级子菜单 */
.nav-submenu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    min-width: 220px;
    list-style: none;
    background: rgba(10, 20, 40, 0.95);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 10px 0;
    margin: 0;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, transform 0.3s, color 0.3s;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.15);
    z-index: 100;
}

.nav-submenu::before {
    content: '';
    position: absolute;
    top: -1px;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
}

.nav-dropdown:hover .nav-submenu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.nav-submenu li {
    list-style: none;
    margin: 0;
}

.nav-submenu a {
    display: block;
    padding: 10px 22px;
    color: var(--text-dim);
    text-decoration: none;
    font-size: 13px;
    letter-spacing: 1px;
    transition: opacity 0.3s, transform 0.3s, color 0.3s;
    border-left: 2px solid transparent;
    position: relative;
    white-space: nowrap;
}

.nav-submenu a::before {
    display: none;
}

.nav-submenu a:hover {
    background: rgba(0, 240, 255, 0.08);
    color: var(--primary);
    border-left-color: var(--primary);
    padding-left: 28px;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    z-index: 1001;
}

.menu-toggle span {
    width: 28px;
    height: 2px;
    background: var(--primary);
    transition: opacity 0.3s, transform 0.3s, color 0.3s;
    box-shadow: var(--glow);
}

/* ===================== 首页 Hero ===================== */
.hero {
    min-height: calc(100vh - 80px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px 40px 80px;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.hero-circle {
    position: absolute;
    border-radius: 50%;
    border: 1px solid var(--border);
    animation: pulse-circle 4s ease-in-out infinite;
}

.hero-circle-1 {
    width: 400px;
    height: 400px;
    top: 10%;
    left: 5%;
    animation-delay: 0s;
}

.hero-circle-2 {
    width: 600px;
    height: 600px;
    bottom: -20%;
    right: -10%;
    animation-delay: 1s;
}

.hero-circle-3 {
    width: 300px;
    height: 300px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 2s;
}

@keyframes pulse-circle {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.05); }
}

.hero-content {
    max-width: 1400px;
    width: 100%;
    text-align: center;
    position: relative;
    z-index: 2;
}

.hero-tag {
    display: inline-block;
    padding: 8px 20px;
    border: 1px solid var(--primary);
    border-radius: 30px;
    font-size: 12px;
    letter-spacing: 4px;
    color: var(--primary);
    margin-bottom: 30px;
    animation: glow-pulse 2s ease-in-out infinite;
    background: rgba(0, 240, 255, 0.05);
}

@keyframes glow-pulse {
    0%, 100% { box-shadow: 0 0 12px rgba(0, 240, 255, 0.3); }
    50% { box-shadow: 0 0 12px rgba(0, 240, 255, 0.6); }
}

.hero-title {
    font-size: clamp(48px, 8vw, 110px);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 30px;
    letter-spacing: 8px;
}

.hero-title-line {
    display: block;
}

.glow-text {
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: text-shine 3s linear infinite;
    background-size: 200% auto;
}

@keyframes text-shine {
    0% { background-position: 0% center; }
    100% { background-position: 200% center; }
}

.hero-desc {
    font-size: clamp(16px, 2vw, 20px);
    color: var(--text-dim);
    margin-bottom: 50px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 80px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 36px;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 2px;
    text-decoration: none;
    cursor: pointer;
    transition: opacity 0.3s, transform 0.3s, color 0.3s;
    position: relative;
    overflow: hidden;
    border: none;
    font-family: inherit;
}

.btn-primary {
    background: linear-gradient(90deg, var(--primary), var(--primary-dark));
    color: var(--bg-dark);
    box-shadow: var(--glow-strong);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s ease;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.6);
}

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

.btn-secondary:hover {
    background: var(--primary);
    color: var(--bg-dark);
    box-shadow: var(--glow-strong);
    transform: translateY(-3px);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    max-width: 900px;
    margin: 0 auto;
}

.stat-item {
    text-align: center;
    padding: 20px;
    border-left: 1px solid var(--border);
}

.stat-item:first-child {
    border-left: none;
}

.stat-num {
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 900;
    color: var(--primary);
    text-shadow: var(--glow);
    margin-bottom: 5px;
    font-family: 'Courier New', monospace;
}

.stat-label {
    font-size: 12px;
    color: var(--text-dim);
    letter-spacing: 2px;
}

/* ===================== Hero 无人机装饰 ===================== */
.hero-drone {
    position: absolute;
    top: 50%;
    right: 5%;
    transform: translateY(-50%);
    width: 500px;
    height: 500px;
    z-index: 1;
    pointer-events: none;
}

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

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--text-dim);
    font-size: 11px;
    letter-spacing: 3px;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-10px); }
}

.mouse {
    width: 24px;
    height: 38px;
    border: 2px solid var(--primary);
    border-radius: 12px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background: var(--primary);
    border-radius: 2px;
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    animation: wheel-move 1.5s ease-in-out infinite;
}

@keyframes wheel-move {
    0%, 100% { top: 6px; opacity: 1; }
    50% { top: 18px; opacity: 0.5; }
}

/* ===================== 通用 Section ===================== */
.section {
    padding: 120px 40px;
    position: relative;
    max-width: 1400px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-tag {
    display: inline-block;
    font-size: 12px;
    letter-spacing: 4px;
    color: var(--primary);
    margin-bottom: 15px;
    font-family: 'Courier New', monospace;
}

.section-title {
    font-size: clamp(36px, 5vw, 60px);
    font-weight: 900;
    margin-bottom: 20px;
    letter-spacing: 4px;
    background: linear-gradient(90deg, var(--text), var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* ===================== 产品中心 ===================== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.product-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    position: relative;
    transition: all 0.4s ease;
    /* backdrop-filter: blur(10px); */ /* perf: removed */
    /* -webkit-backdrop-filter: blur(10px); */ /* perf: removed */
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

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

.product-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
}

.product-image {
    height: 220px;
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.1), rgba(123, 47, 247, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.product-img-bg {
    position: absolute;
    width: 200%;
    height: 200%;
    background:
        radial-gradient(circle at center, rgba(0, 240, 255, 0.3) 0%, transparent 50%);
    animation: pulse-bg 3s ease-in-out infinite;
}

@keyframes pulse-bg {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.1); }
}

.product-icon {
    width: 100px;
    height: 100px;
    color: var(--primary);
    z-index: 1;
    filter: drop-shadow(0 0 20px var(--primary));
    transition: all 0.4s ease;
}

.product-card:hover .product-icon {
    transform: scale(1.2) rotate(10deg);
}

.product-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    padding: 5px 12px;
    background: rgba(0, 240, 255, 0.2);
    border: 1px solid var(--primary);
    color: var(--primary);
    font-size: 11px;
    border-radius: 3px;
    letter-spacing: 2px;
    /* backdrop-filter: blur(5px); */ /* perf: removed */
}

.product-info {
    padding: 25px;
}

.product-name {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text);
    letter-spacing: 1px;
}

.product-sub {
    font-size: 13px;
    color: var(--text-dim);
    margin-bottom: 20px;
}

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

.product-specs li {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px dashed rgba(0, 240, 255, 0.1);
    font-size: 13px;
}

.product-specs li span {
    color: var(--text-dim);
}

.product-specs li strong {
    color: var(--primary);
    font-family: 'Courier New', monospace;
}

.product-link {
    display: inline-block;
    color: var(--primary);
    text-decoration: none;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 1px;
    transition: opacity 0.3s, transform 0.3s, color 0.3s;
}

.product-link:hover {
    letter-spacing: 3px;
}

/* ===================== 核心科技 ===================== */
.features {
    background: linear-gradient(180deg, transparent, rgba(0, 240, 255, 0.02), transparent);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 40px 30px;
    position: relative;
    transition: all 0.4s ease;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 240, 255, 0.1) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: var(--glow);
}

.feature-num {
    position: absolute;
    top: 20px;
    right: 25px;
    font-size: 60px;
    font-weight: 900;
    color: rgba(0, 240, 255, 0.15);
    font-family: 'Courier New', monospace;
    line-height: 1;
}

.feature-icon {
    width: 60px;
    height: 60px;
    color: var(--primary);
    margin-bottom: 20px;
    filter: drop-shadow(0 0 10px var(--primary));
    position: relative;
    z-index: 1;
}

.feature-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text);
    position: relative;
    z-index: 1;
}

.feature-desc {
    font-size: 14px;
    color: var(--text-dim);
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

/* ===================== 行业应用 ===================== */
.app-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

.app-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 35px 25px;
    text-align: center;
    transition: all 0.4s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.app-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.app-card:hover::after {
    transform: scaleX(1);
}

.app-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary);
    background: rgba(0, 240, 255, 0.05);
}

.app-icon {
    font-size: 48px;
    margin-bottom: 20px;
    display: inline-block;
    filter: drop-shadow(0 0 10px var(--primary));
    transition: transform 0.4s ease;
}

.app-card:hover .app-icon {
    transform: scale(1.2) rotate(10deg);
}

.app-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text);
}

.app-card p {
    font-size: 13px;
    color: var(--text-dim);
}

/* ===================== 关于我们 ===================== */
.about {
    padding: 120px 40px;
    max-width: 1400px;
    margin: 0 auto;
}

.about-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-visual {
    position: relative;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-globe {
    position: relative;
    width: 350px;
    height: 350px;
}

.globe-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    border: 1px solid var(--border);
    border-radius: 50%;
    transform: translate(-50%, -50%);
}

.globe-ring-1 {
    width: 350px;
    height: 350px;
    animation: rotate 20s linear infinite;
}

.globe-ring-2 {
    width: 280px;
    height: 280px;
    animation: rotate 15s linear infinite reverse;
    border-color: var(--primary);
}

.globe-ring-3 {
    width: 200px;
    height: 200px;
    animation: rotate 25s linear infinite;
}

.globe-core {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background: radial-gradient(circle, var(--primary), var(--secondary));
    border-radius: 50%;
    box-shadow: 0 0 12px var(--primary);
    animation: pulse-core 3s ease-in-out infinite;
}

@keyframes pulse-core {
    0%, 100% { box-shadow: 0 0 12px var(--primary); }
    50% { box-shadow: 0 0 12px var(--primary), 0 0 120px var(--secondary); }
}

.globe-dot {
    position: absolute;
    width: 12px;
    height: 12px;
    background: var(--primary);
    border-radius: 50%;
    box-shadow: 0 0 12px var(--primary);
}

.globe-dot-1 { top: 10%; left: 50%; animation: dot-orbit 8s linear infinite; }
.globe-dot-2 { top: 50%; right: 5%; animation: dot-orbit 10s linear infinite; }
.globe-dot-3 { bottom: 15%; left: 30%; animation: dot-orbit 12s linear infinite; }
.globe-dot-4 { top: 30%; left: 10%; animation: dot-orbit 9s linear infinite; }
.globe-dot-5 { bottom: 25%; right: 20%; animation: dot-orbit 11s linear infinite; }
.globe-dot-6 { top: 60%; left: 60%; animation: dot-orbit 13s linear infinite; }

@keyframes dot-orbit {
    from { transform: rotate(0deg) translateX(150px) rotate(0deg); }
    to { transform: rotate(360deg) translateX(150px) rotate(-360deg); }
}

.about-stats-grid {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.mini-stat {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 15px;
    text-align: center;
    border-radius: 6px;
    /* backdrop-filter: blur(10px); */ /* perf: removed */
}

.mini-num {
    font-size: 24px;
    font-weight: 900;
    color: var(--primary);
    font-family: 'Courier New', monospace;
    text-shadow: var(--glow);
}

.mini-label {
    font-size: 11px;
    color: var(--text-dim);
    letter-spacing: 1px;
    margin-top: 5px;
}

.about-content {
    position: relative;
}

.about-content .section-tag,
.about-content .section-title {
    text-align: left;
}

.about-text {
    font-size: 15px;
    color: var(--text-dim);
    line-height: 1.9;
    margin-bottom: 20px;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 40px;
}

.about-feature {
    display: flex;
    gap: 15px;
    align-items: flex-start;
}

.check {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-dark);
    font-weight: 900;
    flex-shrink: 0;
    box-shadow: var(--glow);
}

.about-feature h4 {
    font-size: 15px;
    color: var(--text);
    margin-bottom: 5px;
}

.about-feature p {
    font-size: 13px;
    color: var(--text-dim);
}

/* ===================== 联系我们 ===================== */
.contact {
    background: linear-gradient(180deg, transparent, rgba(0, 240, 255, 0.03), transparent);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.contact-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 40px 30px;
    text-align: center;
    transition: all 0.4s ease;
    /* backdrop-filter: blur(10px); */ /* perf: removed */
    position: relative;
    overflow: hidden;
}

.contact-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, rgba(0, 240, 255, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.contact-card:hover::before {
    opacity: 1;
}

.contact-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: var(--glow);
}

.contact-icon {
    width: 60px;
    height: 60px;
    color: var(--primary);
    margin: 0 auto 20px;
    filter: drop-shadow(0 0 10px var(--primary));
    position: relative;
    z-index: 1;
}

.contact-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--text);
    position: relative;
    z-index: 1;
}

.contact-card p {
    font-size: 14px;
    color: var(--text-dim);
    line-height: 1.8;
    position: relative;
    z-index: 1;
}

.contact-card p strong {
    color: var(--primary);
}

.contact-card a {
    color: var(--primary);
    text-decoration: none;
    transition: opacity 0.3s, transform 0.3s, color 0.3s;
}

.contact-card a:hover {
    text-shadow: var(--glow);
}

.contact-form-wrapper {
    max-width: 700px;
    margin: 0 auto;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 40px;
    /* backdrop-filter: blur(10px); */ /* perf: removed */
}

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

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 13px;
    color: var(--primary);
    letter-spacing: 2px;
    font-weight: 600;
}

.form-group input,
.form-group textarea {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 12px 15px;
    color: var(--text);
    font-size: 14px;
    font-family: inherit;
    transition: opacity 0.3s, transform 0.3s, color 0.3s;
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
    background: rgba(0, 0, 0, 0.5);
}

.contact-form .btn {
    width: 100%;
    justify-content: center;
    margin-top: 10px;
}

/* ===================== 页脚 ===================== */
.footer {
    background: var(--bg-darker);
    border-top: 1px solid var(--border);
    padding: 60px 40px 30px;
    margin-top: 60px;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.footer-logo img {
    height: 80px;
    width: 260px;
}

.footer-logo .logo-name {
    font-size: 28px;
}

.footer-logo .logo-sub {
    font-size: 12px;
}

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

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-col h4 {
    font-size: 15px;
    color: var(--primary);
    margin-bottom: 20px;
    letter-spacing: 2px;
    font-weight: 700;
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: 12px;
    font-size: 14px;
    color: var(--text-dim);
}

.footer-col a {
    color: var(--text-dim);
    text-decoration: none;
    transition: opacity 0.3s, transform 0.3s, color 0.3s;
}

.footer-col a:hover {
    color: var(--primary);
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(0, 240, 255, 0.1);
    color: var(--text-muted);
    font-size: 13px;
    letter-spacing: 1px;
}

/* ===================== 响应式 ===================== */
@media (max-width: 1024px) {
    .about-container {
        grid-template-columns: 1fr;
        gap: 60px;
    }

    .about-visual {
        height: 400px;
    }

    .hero-drone {
        display: none;
    }

    .footer-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-container {
        padding: 0 20px;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: rgba(5, 5, 16, 0.95);
    /* backdrop-filter: blur(20px); */ /* perf: removed */
        flex-direction: column;
        justify-content: flex-start;
        align-items: stretch;
        gap: 0;
        transition: right 0.4s ease;
        padding: 80px 20px 40px;
        border-left: 1px solid var(--border);
        overflow-y: auto;
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-menu > li {
        padding: 12px 0;
        border-bottom: 1px solid rgba(0, 240, 255, 0.1);
    }

    .nav-menu > li > a {
        font-size: 16px;
    }

    .nav-submenu {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        background: transparent;
        border: none;
        box-shadow: none;
    /* backdrop-filter: none; */ /* perf: removed */
        padding: 10px 0 0 20px;
        min-width: auto;
        display: none;
    }

    .nav-submenu::before {
        display: none;
    }

    .nav-dropdown:hover .nav-submenu,
    .nav-dropdown.active .nav-submenu {
        display: block;
        transform: none;
    }

    .nav-submenu a {
        padding: 8px 15px;
        font-size: 13px;
        white-space: normal;
    }

    .nav-submenu a:hover {
        padding-left: 20px;
    }

    .menu-toggle {
        display: flex;
    }

    .menu-toggle.active span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

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

    .menu-toggle.active span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .section {
        padding: 80px 20px;
    }

    .hero {
        padding: 60px 20px 60px;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .stat-item {
        border-left: none;
        border-bottom: 1px solid var(--border);
        padding: 15px;
    }

    .stat-item:nth-child(odd) {
        border-right: 1px solid var(--border);
    }

    .about-features {
        grid-template-columns: 1fr;
    }

    .contact-form-wrapper {
        padding: 25px;
    }

    .contact-form .form-row {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .footer {
        padding: 40px 20px 20px;
    }

    .product-grid {
        grid-template-columns: 1fr;
    }

    .app-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-visual {
        height: 350px;
    }

    .about-globe {
        width: 280px;
        height: 280px;
    }

    .globe-ring-1 { width: 280px; height: 280px; }
    .globe-ring-2 { width: 220px; height: 220px; }
    .globe-ring-3 { width: 160px; height: 160px; }
    .globe-core { width: 60px; height: 60px; }

    @keyframes dot-orbit {
        from { transform: rotate(0deg) translateX(120px) rotate(0deg); }
        to { transform: rotate(360deg) translateX(120px) rotate(-360deg); }
    }
}

@media (max-width: 480px) {
    .hero-title {
        letter-spacing: 4px;
    }

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

    .btn {
        width: 100%;
        max-width: 250px;
        justify-content: center;
    }

    .hero-stats {
        grid-template-columns: 1fr 1fr;
    }

    .app-grid {
        grid-template-columns: 1fr;
    }

    .about-stats-grid {
        grid-template-columns: repeat(2, 1fr);
        position: relative;
        margin-top: 30px;
    }

    .hero-tag {
        font-size: 10px;
        letter-spacing: 2px;
    }
}

/* ===================== 滚动动画 ===================== */
.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===================== 实时遥测数据看板 ===================== */
.telemetry {
    position: relative;
    overflow: hidden;
}

.telemetry-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0.4;
}

#telemetry-canvas {
    width: 100%;
    height: 100%;
}

.telemetry-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 25px;
    margin-bottom: 50px;
}

.telemetry-card {
    background: rgba(10, 20, 40, 0.7);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 30px 25px;
    position: relative;
    overflow: hidden;
    /* backdrop-filter: blur(10px); */ /* perf: removed */
    /* -webkit-backdrop-filter: blur(10px); */ /* perf: removed */
    transition: all 0.4s ease;
}

.telemetry-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

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

.telemetry-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.2);
}

.telemetry-icon {
    width: 50px;
    height: 50px;
    color: var(--primary);
    margin-bottom: 20px;
    filter: drop-shadow(0 0 10px var(--primary));
    animation: spin-slow 10s linear infinite;
}

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

.telemetry-data {
    margin-bottom: 15px;
}

.telemetry-num {
    font-size: 38px;
    font-weight: 900;
    color: var(--primary);
    font-family: 'Courier New', monospace;
    text-shadow: 0 0 20px rgba(0, 240, 255, 0.5);
    line-height: 1;
    margin-bottom: 8px;
}

.telemetry-label {
    font-size: 13px;
    color: var(--text-dim);
    letter-spacing: 2px;
    margin-bottom: 8px;
}

.telemetry-trend {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 11px;
    font-family: 'Courier New', monospace;
}

.telemetry-trend.up {
    background: rgba(0, 255, 100, 0.15);
    color: #00ff80;
    border: 1px solid rgba(0, 255, 100, 0.3);
}

.telemetry-mini-chart {
    height: 40px;
    margin-top: 10px;
    position: relative;
    overflow: hidden;
}

#chart-aircraft,
#chart-hours,
#chart-countries,
#chart-success {
    height: 40px;
    width: 100%;
    margin-top: 10px;
    display: block;
}

.telemetry-mini-chart::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, var(--primary), transparent);
}

.telemetry-stream {
    background: rgba(10, 20, 40, 0.7);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 25px;
    /* backdrop-filter: blur(10px); */ /* perf: removed */
    /* -webkit-backdrop-filter: blur(10px); */ /* perf: removed */
    max-height: 400px;
    overflow: hidden;
}

.stream-header {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: 'Courier New', monospace;
    font-size: 13px;
    color: var(--primary);
    letter-spacing: 2px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 15px;
}

.stream-dot {
    width: 10px;
    height: 10px;
    background: var(--primary);
    border-radius: 50%;
    box-shadow: 0 0 12px var(--primary);
    animation: pulse-dot 1s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.8); }
}

.stream-list {
    max-height: 320px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.stream-item {
    display: grid;
    grid-template-columns: 80px 1fr auto;
    gap: 15px;
    align-items: center;
    padding: 10px 15px;
    background: rgba(0, 240, 255, 0.03);
    border-left: 2px solid var(--primary);
    font-family: 'Courier New', monospace;
    font-size: 12px;
    color: var(--text-dim);
    border-radius: 0 4px 4px 0;
    animation: stream-in 0.4s ease;
}

@keyframes stream-in {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}

.stream-time {
    color: var(--primary);
}

.stream-status {
    padding: 2px 8px;
    border-radius: 3px;
    font-size: 10px;
    letter-spacing: 1px;
}

.stream-status.success { background: rgba(0, 255, 100, 0.15); color: #00ff80; }
.stream-status.active { background: rgba(0, 240, 255, 0.15); color: var(--primary); }
.stream-status.info { background: rgba(123, 47, 247, 0.15); color: var(--secondary); }

/* ===================== 工作流程 ===================== */
.workflow {
    background: linear-gradient(180deg, transparent, rgba(0, 240, 255, 0.02), transparent);
}

.workflow-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 25px;
    position: relative;
    z-index: 1;
}

.workflow-step {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 30px 25px;
    text-align: center;
    position: relative;
    transition: all 0.4s ease;
    /* backdrop-filter: blur(10px); */ /* perf: removed */
    /* -webkit-backdrop-filter: blur(10px); */ /* perf: removed */
}

.workflow-step:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
}

.step-num {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Courier New', monospace;
    font-weight: 900;
    font-size: 13px;
    color: var(--bg-dark);
    box-shadow: 0 0 12px var(--primary);
}

.step-icon {
    width: 60px;
    height: 60px;
    color: var(--primary);
    margin: 20px auto;
    filter: drop-shadow(0 0 15px var(--primary));
    transition: transform 0.4s ease;
}

.workflow-step:hover .step-icon {
    transform: rotate(360deg) scale(1.1);
    transition: transform 0.8s ease;
}

.workflow-step h3 {
    font-size: 18px;
    color: var(--text);
    margin-bottom: 12px;
    letter-spacing: 1px;
}

.workflow-step p {
    font-size: 13px;
    color: var(--text-dim);
    line-height: 1.7;
    margin-bottom: 18px;
}

.step-tags {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: center;
}

.step-tags li {
    padding: 4px 10px;
    background: rgba(0, 240, 255, 0.1);
    border: 1px solid rgba(0, 240, 255, 0.2);
    border-radius: 12px;
    font-size: 11px;
    color: var(--primary);
    font-family: 'Courier New', monospace;
}

/* ===================== 客户案例 ===================== */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: auto;
    gap: 25px;
}

.case-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.4s ease;
    cursor: pointer;
    /* backdrop-filter: blur(10px); */ /* perf: removed */
    /* -webkit-backdrop-filter: blur(10px); */ /* perf: removed */
    display: flex;
    flex-direction: column;
}

.case-card-large {
    /* 改为普通卡片，不再跨2行 */
}

.case-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
}

.case-image {
    height: 200px;
    position: relative;
    overflow: hidden;
    background: var(--bg-darker);
}

.case-card-large .case-image {
    height: 280px;
}

.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
    filter: brightness(0.7);
}

.case-card:hover .case-image img {
    transform: scale(1.08);
    filter: brightness(0.9);
}

.case-overlay {
    position: absolute;
    top: 15px;
    left: 15px;
    z-index: 2;
}

.case-tag {
    padding: 5px 12px;
    background: rgba(0, 0, 0, 0.7);
    border: 1px solid var(--primary);
    color: var(--primary);
    font-size: 11px;
    letter-spacing: 2px;
    border-radius: 3px;
    /* backdrop-filter: blur(10px); */ /* perf: removed */
}

.case-info {
    padding: 25px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.case-info h3 {
    font-size: 18px;
    color: var(--text);
    margin-bottom: 15px;
    font-weight: 700;
}

.case-card-large .case-info h3 {
    font-size: 22px;
}

.case-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    margin: 20px 0;
    padding: 20px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.case-stat {
    text-align: center;
}

.case-stat-num {
    display: block;
    font-size: 24px;
    font-weight: 900;
    color: var(--primary);
    font-family: 'Courier New', monospace;
    text-shadow: 0 0 10px var(--primary);
    margin-bottom: 4px;
}

.case-stat-label {
    display: block;
    font-size: 11px;
    color: var(--text-dim);
    letter-spacing: 1px;
}

.case-info p {
    font-size: 13px;
    color: var(--text-dim);
    line-height: 1.7;
    flex: 1;
}

.case-result {
    margin-top: 12px;
    padding: 8px 14px;
    background: rgba(0, 240, 255, 0.1);
    border: 1px solid var(--primary);
    color: var(--primary);
    font-size: 12px;
    font-family: 'Courier New', monospace;
    border-radius: 4px;
    text-align: center;
    letter-spacing: 1px;
}

/* ===================== 技术架构 ===================== */
.architecture {
    background: linear-gradient(180deg, transparent, rgba(0, 240, 255, 0.02), transparent);
}

.arch-container {
    display: flex;
    flex-direction: column;
    gap: 0;
    max-width: 1000px;
    margin: 0 auto;
}

.arch-layer {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 25px 30px;
    /* backdrop-filter: blur(10px); */ /* perf: removed */
    /* -webkit-backdrop-filter: blur(10px); */ /* perf: removed */
    display: flex;
    align-items: center;
    gap: 30px;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.arch-layer::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary), var(--secondary));
    opacity: 0.6;
}

.arch-layer:hover {
    border-color: var(--primary);
    transform: translateX(10px);
    box-shadow: -10px 0 30px rgba(0, 240, 255, 0.2);
}

.arch-layer-tag {
    flex-shrink: 0;
    padding: 12px 18px;
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.2), rgba(123, 47, 247, 0.2));
    border: 1px solid var(--primary);
    color: var(--primary);
    font-family: 'Courier New', monospace;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 2px;
    border-radius: 4px;
    min-width: 100px;
    text-align: center;
}

.arch-layer-content {
    flex: 1;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.arch-item {
    padding: 8px 16px;
    background: rgba(0, 240, 255, 0.05);
    border: 1px solid rgba(0, 240, 255, 0.2);
    border-radius: 4px;
    font-size: 13px;
    color: var(--text);
    transition: opacity 0.3s, transform 0.3s, color 0.3s;
    cursor: pointer;
}

.arch-item:hover {
    background: rgba(0, 240, 255, 0.15);
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
}

.arch-arrow {
    width: 2px;
    height: 30px;
    background: linear-gradient(180deg, var(--primary), transparent);
    margin: 0 auto;
    position: relative;
}

.arch-arrow::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 6px solid var(--primary);
}

/* 响应式 */
@media (max-width: 1024px) {
    .cases-grid {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: auto;
    }
    .case-card-large {
        grid-column: span 2;
        grid-row: span 1;
    }
    .arch-layer {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 768px) {
    .cases-grid {
        grid-template-columns: 1fr;
    }
    .case-card-large {
        grid-column: span 1;
    }
    .arch-layer-content {
        gap: 8px;
    }
    .arch-item {
        font-size: 12px;
        padding: 6px 12px;
    }
    .stream-item {
        grid-template-columns: 60px 1fr;
        font-size: 11px;
    }
    .stream-item .stream-status {
        grid-column: span 2;
        margin-top: 5px;
        text-align: center;
    }
}

/* ===================== Hero 粒子网络背景 ===================== */
.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

#particle-canvas {
    width: 100%;
    height: 100%;
    opacity: 0.6;
}

/* ===================== Hero 增强效果 ===================== */
.hero-data-stream {
    position: absolute;
    bottom: 100px;
    left: 40px;
    font-family: 'Courier New', monospace;
    font-size: 11px;
    color: var(--primary);
    z-index: 2;
    opacity: 0.5;
    pointer-events: none;
    line-height: 1.8;
    letter-spacing: 1px;
}

.hero-data-stream .data-line {
    animation: data-flicker 2s ease-in-out infinite;
}

.hero-data-stream .data-line:nth-child(2) {
    animation-delay: 0.5s;
}

.hero-data-stream .data-line:nth-child(3) {
    animation-delay: 1s;
}

@keyframes data-flicker {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}

.hero-status-indicator {
    position: absolute;
    top: 100px;
    right: 40px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    background: rgba(0, 240, 255, 0.1);
    border: 1px solid var(--primary);
    border-radius: 30px;
    font-family: 'Courier New', monospace;
    font-size: 11px;
    color: var(--primary);
    letter-spacing: 2px;
    z-index: 2;
    /* backdrop-filter: blur(10px); */ /* perf: removed */
    /* -webkit-backdrop-filter: blur(10px); */ /* perf: removed */
}

.hero-status-indicator .status-dot {
    width: 8px;
    height: 8px;
    background: #00ff80;
    border-radius: 50%;
    box-shadow: 0 0 12px #00ff80;
    animation: pulse-dot 1.5s ease-in-out infinite;
}

/* ===================== 全息卡片效果 ===================== */
.feature-card.holographic {
    background: linear-gradient(135deg,
        rgba(0, 240, 255, 0.05) 0%,
        rgba(123, 47, 247, 0.05) 50%,
        rgba(0, 240, 255, 0.05) 100%);
    background-size: 200% 200%;
    animation: holo-shift 8s ease infinite;
}

@keyframes holo-shift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.feature-card.holographic::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(105deg,
        transparent 30%,
        rgba(0, 240, 255, 0.1) 50%,
        transparent 70%);
    background-size: 200% 100%;
    animation: holo-shine 3s linear infinite;
    pointer-events: none;
}

@keyframes holo-shine {
    from { background-position: -200% 0; }
    to { background-position: 200% 0; }
}

/* ===================== 雷达扫描效果 ===================== */
.radar {
    position: absolute;
    width: 300px;
    height: 300px;
    pointer-events: none;
    opacity: 0.3;
}

.radar-circle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 1px solid var(--primary);
    border-radius: 50%;
}

.radar-circle:nth-child(1) { width: 100%; height: 100%; }
.radar-circle:nth-child(2) { width: 70%; height: 70%; }
.radar-circle:nth-child(3) { width: 40%; height: 40%; }

.radar-sweep {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 50%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary));
    transform-origin: left center;
    animation: radar-rotate 3s linear infinite;
    box-shadow: 0 0 12px var(--primary);
}

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

/* ===================== Hero 无人机机队 ===================== */
.hero-drone {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 500px;
    height: 500px;
    z-index: 1;
    pointer-events: none;
}

.hero-drone-left {
    left: 3%;
}

.hero-drone-right {
    right: 3%;
}

.hero-drone-fleet {
    position: relative;
    width: 100%;
    height: 100%;
}

.hero-drone-img {
    position: absolute;
    width: auto;
    height: auto;
    max-width: 70%;
    max-height: 70%;
    object-fit: contain;
    filter: drop-shadow(0 0 25px rgba(0, 240, 255, 0.6))
            drop-shadow(0 10px 30px rgba(0, 240, 255, 0.4));
    opacity: 0.75;}

.hero-drone-main {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 320px;
    max-width: 80%;
    max-height: 80%;
    animation: float 6s ease-in-out infinite;
    opacity: 0.75;
    z-index: 4;
}

.hero-drone-secondary {
    top: 15%;
    right: 0;
    width: 140px;
    max-width: 40%;
    animation: float-1 7s ease-in-out infinite;
    opacity: 0.6;
    z-index: 2;
}

.hero-drone-tertiary {
    bottom: 10%;
    left: 0;
    width: 130px;
    max-width: 40%;
    animation: float-2 8s ease-in-out infinite;
    opacity: 0.6;
    z-index: 3;
}

.hero-drone-quaternary {
    display: none;
}

/* Hero 右侧无人机镜像 */
.hero-drone-right .hero-drone-secondary {
    right: 0;
    left: auto;
}

.hero-drone-right .hero-drone-tertiary {
    left: auto;
    right: 0;
}

.hero-drone-right .hero-drone-quaternary {
    right: auto;
    left: 5%;
}

@keyframes float-1 {
    0%, 100% { transform: translateY(0) rotate(-5deg); }
    50% { transform: translateY(-20px) rotate(5deg); }
}

@keyframes float-2 {
    0%, 100% { transform: translateY(0) rotate(5deg); }
    50% { transform: translateY(-25px) rotate(-5deg); }
}

@keyframes float-3 {
    0%, 100% { transform: translateY(0) rotate(-3deg); }
    50% { transform: translateY(-15px) rotate(3deg); }
}

/* ===================== Hero 飞行无人机（小） ===================== */
.flying-drones {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.flying-drone {
    position: absolute;
    width: 70px;
    height: auto;
    object-fit: contain;
    filter: drop-shadow(0 0 15px rgba(0, 240, 255, 0.7));
    opacity: 0.35;z-index: 2;
}

/* 全局飞行的无人机（drone-fx.js 创建） */
.fx-drone {
    will-change: transform, opacity; transform: translateZ(0);
    position: absolute;
    height: auto;
    object-fit: contain;
    filter: drop-shadow(0 0 15px rgba(0, 240, 255, 0.6));
    opacity: 0;
    will-change: transform, opacity;
    z-index: 2;
}

@keyframes fx-fly-lr {
    0% { transform: translateX(-200px); opacity: 0; }
    10% { opacity: 0.4; }
    90% { opacity: 0.4; }
    100% { transform: translateX(calc(100vw + 200px)); opacity: 0; }
}

@keyframes fx-fly-rl {
    0% { transform: translateX(calc(100vw + 200px)); opacity: 0; }
    10% { opacity: 0.4; }
    90% { opacity: 0.4; }
    100% { transform: translateX(-200px); opacity: 0; }
}

@keyframes fx-fly-bt {
    0% { transform: translateY(calc(100vh + 200px)); opacity: 0; }
    10% { opacity: 0.4; }
    90% { opacity: 0.4; }
    100% { transform: translateY(-200px); opacity: 0; }
}

@keyframes fx-fly-tb {
    0% { transform: translateY(-200px); opacity: 0; }
    10% { opacity: 0.4; }
    90% { opacity: 0.4; }
    100% { transform: translateY(calc(100vh + 200px)); opacity: 0; }
}

.fx-fly-left-to-right {
    animation: fx-fly-lr 18s linear forwards;
}

.fx-fly-right-to-left {
    animation: fx-fly-rl 20s linear forwards;
}

.fx-fly-bottom-to-top {
    animation: fx-fly-bt 22s linear forwards;
}

.fx-fly-top-to-bottom {
    animation: fx-fly-tb 24s linear forwards;
}

.fd-1 {
    top: 20%;
    left: -5%;
    animation: fly-across-1 18s linear infinite;
}

.fd-2 {
    top: 60%;
    right: -5%;
    animation: fly-across-2 22s linear infinite;
}

.fd-3 {
    top: 80%;
    left: -5%;
    animation: fly-across-3 25s linear infinite;
}

@keyframes fly-across-1 {
    0% { transform: translateX(0) translateY(0); opacity: 0; }
    10% { opacity: 0.75; }
    50% { transform: translateX(110vw) translateY(-30px); opacity: 0.75; }
    90% { opacity: 0.75; }
    100% { transform: translateX(110vw) translateY(-30px); opacity: 0; }
}

@keyframes fly-across-2 {
    0% { transform: translateX(0) translateY(0); opacity: 0; }
    10% { opacity: 0.75; }
    50% { transform: translateX(-110vw) translateY(40px); opacity: 0.75; }
    90% { opacity: 0.75; }
    100% { transform: translateX(-110vw) translateY(40px); opacity: 0; }
}

@keyframes fly-across-3 {
    0% { transform: translateX(0) translateY(0) rotate(0); opacity: 0; }
    10% { opacity: 0.7; }
    50% { transform: translateX(110vw) translateY(-50px) rotate(15deg); opacity: 0.7; }
    90% { opacity: 0.7; }
    100% { transform: translateX(110vw) translateY(-50px) rotate(15deg); opacity: 0; }
}

/* ===================== Section 背景无人机 ===================== */
.section-bg-drones {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.bg-drone {
    position: absolute;
    width: 200px;
    height: auto;
    object-fit: contain;
    filter: drop-shadow(0 0 30px rgba(0, 240, 255, 0.3));
    opacity: 0.15;
    transition: opacity 0.6s ease;}

.section:hover .bg-drone {
    opacity: 0.3;
}

.bg-drone-1 {
    top: 10%;
    right: 5%;
    transform: rotate(-15deg);
    animation: float 8s ease-in-out infinite;
}

.bg-drone-2 {
    bottom: 10%;
    left: 5%;
    transform: rotate(15deg);
    animation: float-1 10s ease-in-out infinite;
}

.bg-drone-3 {
    top: 15%;
    left: 8%;
    transform: rotate(-10deg);
    animation: float-2 12s ease-in-out infinite;
}

.bg-drone-4 {
    bottom: 15%;
    right: 8%;
    transform: rotate(10deg);
    animation: float-3 11s ease-in-out infinite;
}

@media (max-width: 1024px) {
    .hero-drone {
        width: 350px;
        height: 350px;
        opacity: 0.6;
    }
    .hero-drone-right {
        right: 0;
    }
    .hero-drone-left {
        left: 0;
    }
    .hero-drone-main { width: 220px; }
    .hero-drone-secondary { width: 110px; }
    .hero-drone-tertiary { width: 100px; }
    .hero-drone-quaternary { width: 90px; }
    .bg-drone { width: 120px; }
}

@media (max-width: 768px) {
    .hero-drone {
        display: none;
    }
}

/* ===================== 产品全景展示 ===================== */
.showcase {
    position: relative;
}

.showcase-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    grid-auto-rows: 240px;
    gap: 18px;
    position: relative;
    z-index: 1;
}

.showcase-item {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.05), rgba(123, 47, 247, 0.05));
    cursor: pointer;
    transition: all 0.4s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.showcase-item-large {
    grid-column: span 2;
    grid-row: span 2;
}

.showcase-item img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 15px;
    transition: transform 0.6s ease;
    filter: drop-shadow(0 5px 20px rgba(0, 240, 255, 0.3));
    z-index: 1;
    position: relative;
}

.showcase-item:hover {
    border-color: var(--primary);
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.4);
    transform: translateY(-5px);
}

.showcase-item:hover img {
    transform: scale(1.15);
}

.showcase-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 18px;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.95), transparent);
    z-index: 2;
    transform: translateY(0);
    transition: transform 0.4s ease;
    text-align: center;
}

.showcase-item:hover .showcase-info {
    transform: translateY(0);
    background: linear-gradient(to top, rgba(0, 240, 255, 0.2), transparent);
}

.showcase-badge {
    display: inline-block;
    padding: 3px 10px;
    background: rgba(0, 240, 255, 0.2);
    border: 1px solid var(--primary);
    color: var(--primary);
    font-size: 10px;
    letter-spacing: 2px;
    border-radius: 3px;
    margin-bottom: 8px;
    display: block;
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
}

.showcase-info h3 {
    font-size: 16px;
    color: var(--text);
    margin-bottom: 4px;
    text-align: center;
}

.showcase-info p {
    font-size: 12px;
    color: var(--text-dim);
    line-height: 1.5;
}

.showcase-item-large .showcase-info h3 {
    font-size: 22px;
}

.showcase-item-large .showcase-info p {
    font-size: 13px;
}

@media (max-width: 768px) {
    .showcase-grid {
        grid-template-columns: repeat(2, 1fr);
        grid-auto-rows: 180px;
    }
    .showcase-item-large {
        grid-column: span 2;
        grid-row: span 1;
    }
}

/* ===================== 全局无人机淡入淡出特效 ===================== */
.drone-fx-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 9998;
    overflow: hidden;
    transition: opacity 0.4s ease;
}

.drone-fx {
    position: absolute;
    height: auto;
    object-fit: contain;
    filter: drop-shadow(0 0 20px rgba(0, 240, 255, 0.5))
            drop-shadow(0 8px 20px rgba(0, 240, 255, 0.35));
    opacity: 0;
    transform: translateY(30px) scale(0.7) rotate(0deg) blur(8px);
    transition: opacity 1.5s ease-in-out,
                transform 1.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                filter 1.5s ease-in-out;
    will-change: opacity, transform, filter;
    pointer-events: auto;
    cursor: pointer;
}

.drone-fx-visible {
    opacity: var(--drone-max-opacity, 0.7);
    transform: translateY(0) scale(1) rotate(var(--drone-rotate, 0deg)) blur(0);
    animation: drone-fx-float 6s ease-in-out infinite;
}

.drone-fx-hide {
    opacity: 0 !important;
    transform: translateY(-40px) scale(0.6) rotate(var(--drone-rotate, 0deg)) blur(10px) !important;
    animation: none !important;
}

@keyframes drone-fx-float {
    0%, 100% { translate: 0 0; }
    25% { translate: -10px -8px; }
    50% { translate: 8px -15px; }
    75% { translate: -5px -5px; }
}

@media (max-width: 768px) {
    .drone-fx-container {
        display: none;
    }
}

/* ===================== 页面两侧大无人机装饰 ===================== */
.side-drones {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
    contain: layout style;
}

.side-drone {
    will-change: contents;
    position: absolute;
    width: 280px;
    height: auto;
    object-fit: contain;
    filter: drop-shadow(0 0 30px rgba(0, 240, 255, 0.5))
            drop-shadow(0 15px 40px rgba(0, 240, 255, 0.4));
    opacity: 0.35;
    transition: opacity 0.4s ease;
}

.side-drone-left-top {
    top: 20%;
    left: 1%;
    animation: float 8s ease-in-out infinite;
}

.side-drone-left-bottom {
    bottom: 20%;
    left: 2%;
    animation: float-1 10s ease-in-out infinite;
}

.side-drone-right-top {
    top: 15%;
    right: 1%;
    animation: float-2 9s ease-in-out infinite;
}

.side-drone-right-bottom {
    bottom: 25%;
    right: 2%;
    animation: float-3 11s ease-in-out infinite;
}

.side-drone-center {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 350px;
    animation: float 12s ease-in-out infinite;
    opacity: 0.2;
}

@media (max-width: 1400px) {
    .side-drone { width: 220px; opacity: 0.3; }
    .side-drone-center { width: 280px; }
}

@media (max-width: 1024px) {
    .side-drone { width: 160px; opacity: 0.25; }
    .side-drone-center { display: none; }
}

@media (max-width: 768px) {
    .side-drones { display: none; }
}

/* 首页已经有大量无人机，不再重复显示 */
body.home-page .side-drones {
    display: none;
}

/* ===================== 配套载荷 ===================== */
.payloads {
    position: relative;
}

.payload-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    position: relative;
    z-index: 1;
}

.payload-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 30px 20px;
    text-align: center;
    transition: all 0.4s ease;
    backdrop-filter: none;
}

.payload-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.2);
}

.payload-icon {
    font-size: 40px;
    margin-bottom: 15px;
    filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.5));
    transition: transform 0.3s ease;
}

.payload-card:hover .payload-icon {
    transform: scale(1.15) rotate(5deg);
}

.payload-card h3 {
    font-size: 17px;
    color: var(--text);
    margin-bottom: 8px;
    font-weight: 700;
}

.payload-card p {
    font-size: 12px;
    color: var(--text-dim);
    line-height: 1.6;
}

/* ===================== 訊和科技云平台 ===================== */
.cloud {
    position: relative;
    background: linear-gradient(180deg, transparent, rgba(0, 240, 255, 0.03), transparent);
}

.cloud-container {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.cloud-header {
    text-align: center;
    margin-bottom: 60px;
}

.cloud-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.cloud-feature {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 35px 30px;
    position: relative;
    overflow: hidden;
    transition: all 0.4s ease;
}

.cloud-feature::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.05), transparent);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.cloud-feature:hover::before {
    opacity: 1;
}

.cloud-feature:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.25);
}

.cloud-feature-num {
    font-size: 36px;
    font-weight: 900;
    color: rgba(0, 240, 255, 0.2);
    font-family: 'Courier New', monospace;
    margin-bottom: 10px;
    line-height: 1;
}

.cloud-feature h3 {
    font-size: 20px;
    color: var(--text);
    margin-bottom: 12px;
    font-weight: 700;
    position: relative;
    z-index: 1;
}

.cloud-feature p {
    font-size: 13px;
    color: var(--text-dim);
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

/* ===================== 服务与支持 ===================== */
.services {
    position: relative;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    position: relative;
    z-index: 1;
}

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 30px 25px;
    transition: all 0.4s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    text-decoration: none;
    color: var(--text);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.service-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

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

.service-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.2);
}

.service-icon {
    font-size: 38px;
    margin-bottom: 15px;
    filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.5));
}

.service-card h3 {
    font-size: 18px;
    color: var(--text);
    margin-bottom: 8px;
    font-weight: 700;
}

.service-card p {
    font-size: 13px;
    color: var(--text-dim);
    line-height: 1.6;
    margin-bottom: 12px;
    flex: 1;
}

.service-arrow {
    align-self: flex-end;
    color: var(--primary);
    font-size: 20px;
    font-weight: 700;
    transition: transform 0.3s ease;
}

.service-card:hover .service-arrow {
    transform: translateX(8px);
}

/* ===================== 返回顶部按钮 ===================== */
.back-to-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 50px;
    height: 50px;
    background: rgba(0, 240, 255, 0.1);
    border: 1px solid var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 9997;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: opacity 0.3s, transform 0.3s, color 0.3s;
    color: var(--primary);
    pointer-events: none;
}

.back-to-top.visible {
    will-change: opacity, transform, visibility;
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
}

.back-to-top:hover {
    background: var(--primary);
    color: var(--bg-dark);
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.8);
    transform: translateY(-5px);
}

.back-to-top svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    stroke-width: 2.5;
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
    transition: transform 0.3s ease;
}

.back-to-top:hover svg {
    transform: translateY(-2px);
    animation: arrow-bounce 1s ease-in-out infinite;
}

@keyframes arrow-bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
}

/* 返回顶部按钮上的进度环 */
.back-to-top::before {
    content: '';
    position: absolute;
    inset: -3px;
    border-radius: 50%;
    background: conic-gradient(
        var(--primary) 0deg,
        var(--primary) calc(var(--scroll-progress, 0) * 3.6deg),
        transparent calc(var(--scroll-progress, 0) * 3.6deg)
    );
    z-index: -1;
    opacity: 0.5;
    transition: opacity 0.3s ease;
}

.back-to-top:hover::before {
    opacity: 1;
}

@media (max-width: 768px) {
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
    }
}

/* ===================== 滚动条 ===================== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary), var(--secondary));
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--secondary), var(--primary));
}

/* ===================== 联系表单消息提示 ===================== */
.form-message {
    margin-top: 16px;
    padding: 14px 20px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    text-align: center;
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity 0.3s ease, transform 0.3s ease;
    pointer-events: none;
}

.form-message.success {
    background: rgba(0, 255, 128, 0.1);
    border: 1px solid rgba(0, 255, 128, 0.4);
    color: #00ff80;
    opacity: 1;
    transform: translateY(0);
}

.form-message.error {
    background: rgba(255, 0, 170, 0.1);
    border: 1px solid rgba(255, 0, 170, 0.4);
    color: #ff6b6b;
    opacity: 1;
    transform: translateY(0);
}

/* 联系表单 select 样式 */
.contact-form select {
    width: 100%;
    padding: 12px 16px;
    background: rgba(5, 5, 16, 0.8);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 14px;
    font-family: inherit;
    cursor: pointer;
    outline: none;
    transition: border-color 0.3s, box-shadow 0.3s;
    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='%2300f0ff' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 40px;
}

.contact-form select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.2);
}

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

/* ===================== 懒加载淡入效果 ===================== */
img[loading="lazy"] {
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
}

img[loading="lazy"].loaded,
img[loading="lazy"]:not([loading]) {
    opacity: 1;
}

/* ===================== 语言切换按钮 ===================== */
.lang-switch {
    display: flex;
    gap: 4px;
    margin-left: 20px;
}

.lang-btn {
    padding: 6px 12px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-dim);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: 4px;
}

.lang-btn:first-child {
    border-radius: 4px 0 0 4px;
}

.lang-btn:last-child {
    border-radius: 0 4px 4px 0;
}

.lang-btn:hover {
    color: var(--primary);
    border-color: var(--primary);
}

.lang-btn.active {
    background: var(--primary);
    color: var(--bg-dark);
    border-color: var(--primary);
}

/* 移动端语言切换 */
@media (max-width: 768px) {
    .lang-switch {
        position: absolute;
        top: 15px;
        right: 60px;
        margin-left: 0;
    }

    .lang-btn {
        padding: 4px 10px;
        font-size: 11px;
    }
}

/* 语言切换按钮容器 */
.nav-right-controls {
    display: flex;
    align-items: center;
    gap: 15px;
}