/* ========== 基础变量 ========== */
:root {
    --bg: #0a0e1a;
    --bg-2: #0f1424;
    --bg-3: #161b2e;
    --fg: #e8ecf5;
    --fg-2: #a4adc5;
    --fg-3: #6b7591;
    --cyan: #00d4ff;
    --purple: #a855f7;
    --blue: #6c5ce7;
    --grad: linear-gradient(135deg, #00d4ff 0%, #6c5ce7 50%, #a855f7 100%);
    --grad-2: linear-gradient(135deg, #00d4ff, #a855f7);
    --border: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(0, 212, 255, 0.3);
    --glass: rgba(20, 26, 48, 0.5);
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    --container: 1200px;
}

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

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

body {
    background: var(--bg);
    color: var(--fg);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    font-size: 16px;
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    position: relative;
}

/* 背景渐变叠加 */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 10%, rgba(0, 212, 255, 0.08), transparent 50%),
        radial-gradient(ellipse at 80% 60%, rgba(168, 85, 247, 0.08), transparent 50%),
        radial-gradient(ellipse at 50% 100%, rgba(108, 92, 231, 0.06), transparent 60%);
    pointer-events: none;
    z-index: 0;
}

/* 粒子画布 */
#particles {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    opacity: 0.6;
}

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 2;
}

/* ========== 通用元素 ========== */
.gradient-text {
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    background-size: 200% 200%;
    animation: gradShift 6s ease infinite;
}

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

.section {
    padding: 120px 0;
    position: relative;
    z-index: 1;
}

.section-head {
    text-align: center;
    margin-bottom: 70px;
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}

.section-tag {
    display: inline-block;
    font-family: 'Orbitron', monospace;
    font-size: 12px;
    letter-spacing: 4px;
    color: var(--cyan);
    padding: 6px 14px;
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 999px;
    background: rgba(0, 212, 255, 0.05);
    margin-bottom: 20px;
}

.section-title {
    font-size: clamp(28px, 4vw, 44px);
    font-weight: 800;
    line-height: 1.25;
    margin-bottom: 18px;
    letter-spacing: -0.02em;
}

.section-desc {
    color: var(--fg-2);
    font-size: 17px;
    line-height: 1.7;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 15px;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-family: inherit;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--grad);
    background-size: 200% 200%;
    color: #0a0e1a;
    box-shadow: 0 8px 30px rgba(0, 212, 255, 0.3);
    animation: gradShift 6s ease infinite;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(0, 212, 255, 0.5);
}

.btn-ghost {
    background: rgba(255, 255, 255, 0.04);
    color: var(--fg);
    border: 1px solid var(--border);
    backdrop-filter: blur(10px);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--border-glow);
    transform: translateY(-2px);
}

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

/* ========== 导航 ========== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 18px 0;
    transition: all 0.3s ease;
}

.nav.scrolled {
    background: rgba(10, 14, 26, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 12px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--fg);
}

.logo-text {
    font-size: 18px;
    font-weight: 700;
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.logo-text small {
    font-size: 10px;
    color: var(--fg-3);
    font-family: 'Orbitron', monospace;
    letter-spacing: 2px;
    font-weight: 400;
    margin-top: 2px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 36px;
    list-style: none;
}

.nav-menu a {
    color: var(--fg-2);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: color 0.2s;
    position: relative;
}

.nav-menu a:not(.nav-cta):hover {
    color: var(--fg);
}

.nav-menu a:not(.nav-cta)::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--grad);
    transition: width 0.3s;
}

.nav-menu a:not(.nav-cta):hover::after {
    width: 100%;
}

.nav-cta {
    padding: 8px 20px;
    border-radius: 999px;
    background: var(--grad);
    color: #0a0e1a !important;
    font-weight: 600;
}

.nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(0, 212, 255, 0.4);
}

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

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--fg);
    transition: all 0.3s;
}

.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(7px, -7px); }

/* ========== Hero ========== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    padding: 100px 24px 60px;
    overflow: hidden;
}

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

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.6;
    animation: orbFloat 18s ease-in-out infinite;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, #00d4ff, transparent 70%);
    top: -100px;
    left: -100px;
}

.orb-2 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, #a855f7, transparent 70%);
    bottom: -150px;
    right: -100px;
    animation-delay: -6s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, #6c5ce7, transparent 70%);
    top: 40%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -12s;
}

@keyframes orbFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(40px, -30px) scale(1.05); }
    66% { transform: translate(-30px, 40px) scale(0.95); }
}

.orb-3 {
    animation-name: orbFloat3;
}

@keyframes orbFloat3 {
    0%, 100% { transform: translate(-50%, -50%) scale(1); }
    50% { transform: translate(-50%, -50%) scale(1.15); }
}

.grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 212, 255, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.04) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 999px;
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid rgba(0, 212, 255, 0.25);
    color: var(--cyan);
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 28px;
    backdrop-filter: blur(10px);
}

.hero-badge .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--cyan);
    box-shadow: 0 0 10px var(--cyan);
    animation: pulse 2s ease infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.85); }
}

.hero-title {
    font-size: clamp(48px, 8vw, 96px);
    font-weight: 900;
    line-height: 1.05;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
    font-family: 'Orbitron', 'Inter', sans-serif;
}

.hero-title .gradient-text {
    display: block;
}

.hero-title-sub {
    display: block;
    color: var(--fg);
    margin-top: 8px;
    -webkit-text-fill-color: var(--fg);
}

.hero-desc {
    font-size: 18px;
    color: var(--fg-2);
    line-height: 1.8;
    margin-bottom: 40px;
}

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

.hero-scroll {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--fg-3);
    font-family: 'Orbitron', monospace;
    font-size: 11px;
    letter-spacing: 3px;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--cyan), transparent);
    position: relative;
    overflow: hidden;
}

.scroll-line::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 30%;
    background: var(--cyan);
    animation: scrollDown 2s ease infinite;
}

@keyframes scrollDown {
    0% { top: -30%; opacity: 0; }
    50% { opacity: 1; }
    100% { top: 100%; opacity: 0; }
}

/* ========== 数据统计 ========== */
.stats {
    padding: 60px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    background: rgba(15, 20, 36, 0.4);
    backdrop-filter: blur(10px);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 24px;
    text-align: center;
}

.stat-item {
    padding: 12px;
}

.stat-num {
    font-family: 'Orbitron', monospace;
    font-size: clamp(28px, 3.5vw, 44px);
    font-weight: 900;
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    margin-bottom: 10px;
}

.stat-label {
    color: var(--fg-2);
    font-size: 14px;
    letter-spacing: 0.5px;
}

/* ========== 业务卡片 ========== */
.biz-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.biz-card {
    position: relative;
    padding: 36px;
    background: var(--glass);
    border: 1px solid var(--border);
    border-radius: 20px;
    backdrop-filter: blur(20px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.biz-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--grad);
    opacity: 0;
    transition: opacity 0.4s;
}

.biz-card::after {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: 20px;
    padding: 1px;
    background: var(--grad);
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.4s;
    pointer-events: none;
}

.biz-card:hover {
    transform: translateY(-6px);
    background: rgba(20, 26, 48, 0.7);
    box-shadow: 0 20px 50px rgba(0, 212, 255, 0.15);
}

.biz-card:hover::before,
.biz-card:hover::after {
    opacity: 1;
}

.biz-icon {
    width: 64px;
    height: 64px;
    margin-bottom: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 16px;
    transition: all 0.4s;
}

.biz-card:hover .biz-icon {
    background: rgba(0, 212, 255, 0.15);
    transform: scale(1.05) rotate(-5deg);
}

.biz-card h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--fg);
}

.biz-card p {
    color: var(--fg-2);
    font-size: 15px;
    line-height: 1.7;
    margin-bottom: 20px;
}

.biz-tags {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.biz-tags li {
    padding: 4px 12px;
    font-size: 12px;
    color: var(--cyan);
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 999px;
    font-family: 'Orbitron', monospace;
    letter-spacing: 0.5px;
}

/* ========== 技术体系 ========== */
.tech-layout {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: center;
}

.tech-visual {
    position: relative;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tech-core {
    position: relative;
    width: 280px;
    height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.core-ring {
    position: absolute;
    border-radius: 50%;
    border: 1px solid rgba(0, 212, 255, 0.3);
}

.core-ring.r1 {
    width: 100%;
    height: 100%;
    animation: rotate 20s linear infinite;
    border-top-color: var(--cyan);
    border-right-color: transparent;
    border-bottom-color: transparent;
    border-left-color: transparent;
}

.core-ring.r2 {
    width: 70%;
    height: 70%;
    border: 1px dashed rgba(168, 85, 247, 0.4);
    animation: rotate 15s linear infinite reverse;
}

.core-ring.r3 {
    width: 45%;
    height: 45%;
    border: 1px solid rgba(108, 92, 231, 0.5);
    animation: rotate 10s linear infinite;
    border-top-color: transparent;
    border-right-color: var(--purple);
}

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

.core-center {
    text-align: center;
    font-family: 'Orbitron', monospace;
    font-weight: 700;
    font-size: 16px;
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    z-index: 2;
}

.core-center span {
    display: inline-block;
    margin: 0 4px;
}

.tech-orbit {
    position: absolute;
    inset: 0;
    animation: rotate 30s linear infinite;
}

.orbit-node {
    position: absolute;
    padding: 6px 14px;
    font-size: 12px;
    font-family: 'Orbitron', monospace;
    color: var(--fg);
    background: var(--bg-2);
    border: 1px solid var(--border-glow);
    border-radius: 999px;
    white-space: nowrap;
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
}

.orbit-node.n1 { top: 0; left: 50%; transform: translateX(-50%); }
.orbit-node.n2 { right: 0; top: 50%; transform: translateY(-50%); }
.orbit-node.n3 { bottom: 0; left: 50%; transform: translateX(-50%); }
.orbit-node.n4 { left: 0; top: 50%; transform: translateY(-50%); }

.tech-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.tech-item {
    display: flex;
    gap: 20px;
    padding: 24px;
    background: var(--glass);
    border: 1px solid var(--border);
    border-radius: 16px;
    backdrop-filter: blur(10px);
    transition: all 0.3s;
}

.tech-item:hover {
    border-color: var(--border-glow);
    transform: translateX(8px);
    background: rgba(20, 26, 48, 0.7);
}

.tech-num {
    font-family: 'Orbitron', monospace;
    font-size: 24px;
    font-weight: 900;
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    flex-shrink: 0;
}

.tech-item h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--fg);
}

.tech-item p {
    color: var(--fg-2);
    font-size: 14px;
    line-height: 1.7;
}

/* ========== 产品矩阵 ========== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.product-card {
    position: relative;
    padding: 36px 30px;
    background: var(--glass);
    border: 1px solid var(--border);
    border-radius: 24px;
    backdrop-filter: blur(20px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.product-card.featured {
    background: linear-gradient(180deg, rgba(0, 212, 255, 0.08), rgba(168, 85, 247, 0.05));
    border-color: rgba(0, 212, 255, 0.3);
    transform: translateY(-12px);
}

.product-card.featured::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--grad);
}

.product-card:hover {
    transform: translateY(-16px);
    border-color: var(--border-glow);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
}

.product-card.featured:hover {
    transform: translateY(-20px);
}

.product-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 6px;
}

.product-tag {
    font-size: 11px;
    padding: 4px 10px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.06);
    color: var(--fg-2);
    font-family: 'Orbitron', monospace;
    letter-spacing: 1px;
}

.product-tag.highlight {
    background: var(--grad);
    color: #0a0e1a;
    font-weight: 700;
}

.product-card h3 {
    font-size: 26px;
    font-weight: 800;
    color: var(--fg);
    font-family: 'Orbitron', sans-serif;
}

.product-en {
    font-size: 12px;
    color: var(--fg-3);
    letter-spacing: 1px;
    margin-bottom: 18px;
    font-family: 'Orbitron', monospace;
}

.product-desc {
    color: var(--fg-2);
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 24px;
}

.product-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.feat {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--fg-2);
}

.feat-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--grad);
    flex-shrink: 0;
    box-shadow: 0 0 8px var(--cyan);
}

/* ========== 关于我们 ========== */
.about-grid {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 60px;
    align-items: center;
}

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

.about-text .section-title {
    margin-bottom: 24px;
}

.about-lead {
    font-size: 18px;
    color: var(--cyan);
    margin-bottom: 20px;
    font-style: italic;
    padding-left: 16px;
    border-left: 2px solid var(--cyan);
}

.about-text p {
    color: var(--fg-2);
    margin-bottom: 18px;
    line-height: 1.85;
}

.about-meta {
    margin-top: 32px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.about-meta > div {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 14px 18px;
    background: var(--glass);
    border: 1px solid var(--border);
    border-radius: 12px;
    backdrop-filter: blur(10px);
}

.about-meta strong {
    font-family: 'Orbitron', monospace;
    font-size: 18px;
    color: var(--cyan);
    min-width: 50px;
}

.about-meta span {
    color: var(--fg-2);
    font-size: 14px;
}

.about-visual {
    position: relative;
}

.about-card-glass {
    background: var(--glass);
    border: 1px solid var(--border);
    border-radius: 16px;
    backdrop-filter: blur(20px);
    overflow: hidden;
    box-shadow: var(--shadow);
}

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

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

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

.glass-title {
    margin-left: 12px;
    color: var(--fg-2);
    font-size: 13px;
    font-family: 'Orbitron', monospace;
    letter-spacing: 1px;
}

.glass-body {
    padding: 28px;
}

.vision-item {
    margin-bottom: 22px;
}

.vision-label {
    font-size: 11px;
    color: var(--cyan);
    font-family: 'Orbitron', monospace;
    letter-spacing: 2px;
    margin-bottom: 6px;
}

.vision-text {
    color: var(--fg);
    font-size: 16px;
    font-weight: 500;
    line-height: 1.6;
}

.cert-grid {
    margin-top: 28px;
    padding-top: 24px;
    border-top: 1px dashed var(--border);
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.cert {
    text-align: center;
    padding: 10px 6px;
    background: rgba(0, 212, 255, 0.06);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 8px;
    font-size: 12px;
    color: var(--fg-2);
    font-weight: 500;
}

/* ========== 合作伙伴 ========== */
.partners-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 16px;
}

.partner {
    padding: 24px 12px;
    text-align: center;
    background: var(--glass);
    border: 1px solid var(--border);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    color: var(--fg-2);
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s;
    cursor: default;
}

.partner:hover {
    color: var(--fg);
    border-color: var(--border-glow);
    background: rgba(0, 212, 255, 0.06);
    transform: translateY(-4px);
}

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

.contact-items {
    margin-top: 32px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 18px;
    background: var(--glass);
    border: 1px solid var(--border);
    border-radius: 14px;
    backdrop-filter: blur(10px);
    transition: all 0.3s;
}

.contact-item:hover {
    border-color: var(--border-glow);
    transform: translateX(6px);
}

.ci-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 10px;
    color: var(--cyan);
    flex-shrink: 0;
}

.ci-label {
    font-size: 12px;
    color: var(--fg-3);
    margin-bottom: 4px;
    font-family: 'Orbitron', monospace;
    letter-spacing: 1px;
}

.ci-value {
    color: var(--fg);
    font-size: 15px;
    font-weight: 500;
}

.contact-form {
    padding: 36px;
    background: var(--glass);
    border: 1px solid var(--border);
    border-radius: 20px;
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow);
}

.contact-form h3 {
    font-size: 22px;
    margin-bottom: 24px;
    color: var(--fg);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-bottom: 14px;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    padding: 13px 16px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--fg);
    font-size: 14px;
    font-family: inherit;
    margin-bottom: 14px;
    transition: all 0.2s;
}

.contact-form textarea {
    resize: vertical;
    min-height: 90px;
}

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

.contact-form select {
    cursor: pointer;
}

.contact-form select option {
    background: var(--bg-2);
}

.form-tip {
    text-align: center;
    color: var(--fg-3);
    font-size: 12px;
    margin-top: 14px;
}

/* ========== Footer ========== */
.footer {
    padding: 80px 0 30px;
    border-top: 1px solid var(--border);
    background: rgba(10, 14, 26, 0.6);
    position: relative;
    z-index: 1;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 50px;
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand p {
    color: var(--fg-2);
    font-size: 14px;
    line-height: 1.7;
    max-width: 320px;
}

.footer-col h5 {
    color: var(--fg);
    font-size: 15px;
    margin-bottom: 16px;
    font-weight: 600;
}

.footer-col a {
    display: block;
    color: var(--fg-2);
    text-decoration: none;
    font-size: 14px;
    padding: 6px 0;
    transition: color 0.2s;
}

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

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--fg-3);
    font-size: 13px;
}

.footer-bottom p {
    margin-bottom: 6px;
}

.footer-addr {
    font-size: 12px !important;
}

/* ========== 滚动揭示动画 ========== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 32px;
    }
    .biz-grid,
    .tech-layout,
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .products-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }
    .product-card.featured {
        transform: translateY(0);
    }
    .product-card.featured:hover {
        transform: translateY(-8px);
    }
    .partners-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 80px 0;
    }
    .nav-menu {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        width: 280px;
        background: rgba(10, 14, 26, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: flex-start;
        padding: 80px 30px 30px;
        gap: 20px;
        transform: translateX(100%);
        transition: transform 0.3s ease;
        border-left: 1px solid var(--border);
    }
    .nav-menu.active {
        transform: translateX(0);
    }
    .nav-toggle {
        display: flex;
        z-index: 1001;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
    .biz-card {
        padding: 28px;
    }
    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .cert-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    .footer-brand {
        margin-bottom: 10px;
    }
    .contact-form {
        padding: 24px;
    }
    .hero-cta {
        flex-direction: column;
        width: 100%;
        max-width: 320px;
        margin-left: auto;
        margin-right: auto;
    }
    .hero-cta .btn {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
    .product-features {
        grid-template-columns: 1fr;
    }
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}