/* Orbitron 可变字体(400-900) 已本地化，原 Google Fonts */
@font-face {
    font-family: 'Orbitron';
    font-style: normal;
    font-weight: 400 900;
    font-display: swap;
    src: url(fonts/orbitron.woff2) format('woff2');
}

/* ==================== 全局变量与基础样式 ==================== */
:root {
    --primary: #00d4ff;
    --primary-dark: #0099cc;
    --secondary: #7c3aed;
    --accent: #06b6d4;
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-card: rgba(17, 24, 39, 0.8);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: rgba(0, 212, 255, 0.2);
    --glow-color: rgba(0, 212, 255, 0.5);
    --gradient-main: linear-gradient(135deg, #00d4ff 0%, #7c3aed 100%);
    --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.3);
}

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

html {
    scroll-behavior: smooth;
}

/* ==================== 无障碍 ==================== */
.skip-link {
    position: absolute;
    top: -100px;
    left: 10px;
    z-index: 10000;
    background: var(--gradient-main);
    color: #fff;
    padding: 8px 16px;
    border-radius: 0 0 8px 8px;
    font-size: 0.9rem;
    transition: top 0.3s;
    text-decoration: none;
}

.skip-link:focus {
    top: 0;
}

/* ==================== 自定义滚动条 ==================== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary-dark), var(--secondary), var(--primary));
    border-radius: 4px;
    border: 2px solid var(--bg-primary);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--primary), var(--secondary), var(--primary-dark));
    box-shadow: 0 0 10px var(--glow-color);
}

::-webkit-scrollbar-corner {
    background: var(--bg-primary);
}

/* Firefox 滚动条 */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--primary-dark) var(--bg-primary);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ==================== 粒子背景 ==================== */
#particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
}

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 15px 0;
    background: rgba(10, 14, 26, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-icon {
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    font-size: 2rem;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: pulse-glow 2s ease-in-out infinite;
    flex-shrink: 0;
}
.logo-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

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

.nav-links {
    display: flex;
    list-style: none;
    gap: 35px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: color 0.3s ease;
    padding: 5px 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-main);
    transition: width 0.3s ease;
}

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

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

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background: var(--primary);
    transition: all 0.3s ease;
}

/* ==================== 英雄区域 ==================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px 20px 60px;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 750px;
    z-index: 2;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 0.9rem;
    color: var(--primary);
    margin-bottom: 25px;
    animation: fadeInUp 0.8s ease;
}

.hero-title {
    font-family: 'Orbitron', sans-serif;
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 25px;
    animation: fadeInUp 0.8s ease 0.2s both;
}

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

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    white-space: pre-line;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    margin-bottom: 60px;
    animation: fadeInUp 0.8s ease 0.6s both;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: var(--gradient-main);
    color: white;
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 212, 255, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary);
    background: rgba(0, 212, 255, 0.1);
}

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

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    animation: fadeInUp 0.8s ease 0.8s both;
}

.stat-item {
    text-align: center;
    min-width: 100px;
}

.stat-number {
    font-family: 'Orbitron', sans-serif;
    font-size: 2.2rem;
    font-weight: 700;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
    min-width: 4ch;
    text-align: center;
    font-variant-numeric: tabular-nums;
}

.stat-plus {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 5px;
}

/* 科技球体视觉效果 */
.hero-visual {
    position: absolute;
    right: 5%;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1;
}

.tech-sphere {
    width: 400px;
    height: 400px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sphere-ring {
    position: absolute;
    border: 2px solid rgba(0, 212, 255, 0.2);
    border-radius: 50%;
    animation: rotate-ring linear infinite;
}

.ring-1 {
    width: 100%;
    height: 100%;
    animation-duration: 20s;
}

.ring-2 {
    width: 75%;
    height: 75%;
    animation-duration: 15s;
    animation-direction: reverse;
}

.ring-3 {
    width: 50%;
    height: 50%;
    animation-duration: 10s;
}

.sphere-core {
    width: 100px;
    height: 100px;
    background: var(--gradient-main);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Orbitron', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    box-shadow: 0 0 60px rgba(0, 212, 255, 0.5),
                inset 0 0 30px rgba(255, 255, 255, 0.2);
    animation: core-pulse 3s ease-in-out infinite;
}

.orbit {
    position: absolute;
    border: 1px dashed rgba(124, 58, 237, 0.3);
    border-radius: 50%;
    animation: orbit-spin linear infinite;
}

.orbit-1 {
    width: 150%;
    height: 150%;
    animation-duration: 12s;
}

.orbit-2 {
    width: 180%;
    height: 120%;
    animation-duration: 18s;
    transform: rotate(60deg);
}

.orbit-3 {
    width: 130%;
    height: 170%;
    animation-duration: 22s;
    transform: rotate(-30deg);
}

.orbit-dot {
    width: 12px;
    height: 12px;
    background: var(--primary);
    border-radius: 50%;
    position: absolute;
    top: -6px;
    left: 50%;
    margin-left: -6px;
    box-shadow: 0 0 20px var(--primary);
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    animation: bounce 2s ease-in-out infinite;
}

.mouse {
    width: 24px;
    height: 38px;
    border: 2px solid var(--text-secondary);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    padding-top: 6px;
}

.wheel {
    width: 4px;
    height: 8px;
    background: var(--primary);
    border-radius: 2px;
    animation: scroll-wheel 2s ease-in-out infinite;
}

/* ==================== 通用区块样式 ==================== */
.section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 70px;
}

.section-tag {
    display: inline-block;
    padding: 6px 18px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--primary);
    letter-spacing: 2px;
    margin-bottom: 20px;
    font-family: 'Orbitron', sans-serif;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 700;
    margin-bottom: 15px;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ==================== 关于我们 ==================== */
.about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 80px;
}

.about-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

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

.about-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
}

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

.card-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    font-size: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.card-icon img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.card-glow h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.card-glow p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.8;
}

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

.image-frame {
    position: relative;
    padding: 20px;
}

.frame-corner {
    position: absolute;
    width: 30px;
    height: 30px;
    border-color: var(--primary);
}

.frame-corner.tl { top: 0; left: 0; border-top: 3px solid; border-left: 3px solid; }
.frame-corner.tr { top: 0; right: 0; border-top: 3px solid; border-right: 3px solid; }
.frame-corner.bl { bottom: 0; left: 0; border-bottom: 3px solid; border-left: 3px solid; }
.frame-corner.br { bottom: 0; right: 0; border-bottom: 3px solid; border-right: 3px solid; }

.placeholder-img {
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(124, 58, 237, 0.1));
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 15px;
    color: var(--text-secondary);
    overflow: hidden;
}
.placeholder-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.placeholder-icon {
    font-size: 4rem;
}

.showcase-content h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.showcase-content > p {
    color: var(--text-secondary);
    margin-bottom: 30px;
    line-height: 1.8;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid rgba(148, 163, 184, 0.1);
    color: var(--text-secondary);
}

.check-icon {
    width: 24px;
    height: 24px;
    background: rgba(0, 212, 255, 0.2);
    color: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    flex-shrink: 0;
}

/* ==================== 舆情监测 ==================== */
.yuqing-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 80px;
}

/* ==================== 服务范围 ==================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 40px 30px;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

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

.service-card.featured {
    border-color: var(--secondary);
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.1), rgba(0, 212, 255, 0.05));
}

.featured-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 5px 14px;
    background: var(--gradient-main);
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    color: white;
}

.service-icon {
    width: 64px;
    height: 64px;
    margin-bottom: 25px;
    color: var(--primary);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.service-icon svg,
.service-icon img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.service-card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.service-card > p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 20px;
    line-height: 1.7;
}

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

.service-tags li {
    padding: 5px 14px;
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* ==================== 解决方案 ==================== */
.solutions-tabs {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 28px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 50px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
}

.tab-btn:hover,
.tab-btn.active {
    background: var(--gradient-main);
    border-color: transparent;
    color: white;
}

.solution-panel {
    display: none;
    grid-template-columns: 300px 1fr;
    gap: 60px;
    align-items: center;
    animation: fadeIn 0.5s ease;
}

.solution-panel.active {
    display: grid;
}

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

.visual-icon {
    width: 250px;
    height: 250px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(124, 58, 237, 0.1));
    border: 1px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    animation: float 6s ease-in-out infinite;
    overflow: hidden;
}

.visual-icon img {
    max-width: 80%;
    max-height: 80%;
    object-fit: contain;
}
}

.panel-info h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.panel-info > p {
    color: var(--text-secondary);
    margin-bottom: 30px;
    line-height: 1.8;
}

.solution-features {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.solution-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    padding: 10px 16px;
    background: rgba(0, 212, 255, 0.05);
    border-left: 3px solid var(--primary);
    border-radius: 0 8px 8px 0;
}

.solution-features li::before {
    content: '▸';
    color: var(--primary);
    font-weight: bold;
}

/* ==================== 成功案例 ==================== */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

.case-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.4s ease;
}

.case-card:hover {
    transform: translateY(-8px) scale(1.02);
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
}

.case-image {
    height: 200px;
    overflow: hidden;
}

.case-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(124, 58, 237, 0.15));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3.5rem;
    transition: transform 0.4s ease;
    padding: 20px;
    box-sizing: border-box;
}

.case-placeholder img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.case-card:hover .case-placeholder {
    transform: scale(1.1);
}

.case-content {
    padding: 25px;
}

.case-category {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(0, 212, 255, 0.15);
    color: var(--primary);
    border-radius: 50px;
    font-size: 0.75rem;
    margin-bottom: 12px;
}

.case-content h4 {
    font-size: 1.1rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.case-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ==================== 合作伙伴 ==================== */
.partners {
    background: var(--bg-secondary);
    overflow: hidden;
}

.partners-marquee {
    overflow: hidden;
    mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
    -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}

.marquee-track {
    display: flex;
    gap: 30px;
    animation: marquee 30s linear infinite;
    width: max-content;
}

.partner-item {
    padding: 20px 50px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    white-space: nowrap;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

.partner-item:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* ==================== 联系我们 ==================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 50px;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.info-card {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 25px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    transition: all 0.3s ease;
}

.info-card:hover {
    border-color: var(--primary);
    transform: translateX(10px);
}

.info-icon {
    width: 50px;
    height: 50px;
    background: rgba(0, 212, 255, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    flex-shrink: 0;
}

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

.info-text h4 {
    font-size: 1rem;
    margin-bottom: 5px;
    color: var(--text-primary);
}

.info-text p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.contact-form-wrapper {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 45px;
}

.contact-form h3 {
    font-size: 1.5rem;
    margin-bottom: 30px;
    text-align: center;
}

.form-group {
    position: relative;
    margin-bottom: 25px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 16px 20px;
    background: rgba(0, 212, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
    outline: none;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-group label {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    transition: all 0.3s ease;
    pointer-events: none;
    font-size: 0.95rem;
}

.form-group textarea + label {
    top: 20px;
    transform: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.15);
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
    top: -10px;
    left: 16px;
    transform: none;
    font-size: 0.8rem;
    background: var(--bg-card);
    padding: 0 8px;
    color: var(--primary);
}

/* ==================== 页脚 ==================== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 80px 0 30px;
}

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

.footer-brand .logo {
    margin-bottom: 20px;
}

.footer-brand p {
    color: var(--text-secondary);
    line-height: 1.8;
}

.footer-links h4 {
    font-size: 1.1rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

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

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a,
.footer-links li {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 0.95rem;
}

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

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 30px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

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

@keyframes pulse-glow {
    0%, 100% { filter: drop-shadow(0 0 10px rgba(0, 212, 255, 0.5)); }
    50% { filter: drop-shadow(0 0 25px rgba(0, 212, 255, 0.8)); }
}

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

@keyframes core-pulse {
    0%, 100% { 
        transform: scale(1); 
        box-shadow: 0 0 60px rgba(0, 212, 255, 0.5);
    }
    50% { 
        transform: scale(1.05); 
        box-shadow: 0 0 80px rgba(0, 212, 255, 0.7);
    }
}

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

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

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

/* ==================== 全局图片安全兜底：所有动态上传图片约束 ==================== */
.logo-icon img,
.card-icon img,
.service-icon img,
.visual-icon img,
.placeholder-img img,
.case-placeholder img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

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

@keyframes marquee {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
}

/* 滚动动画类 */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s ease;
}

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

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
    .hero-visual {
        display: none;
    }

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

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

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

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

    .solution-panel {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .panel-visual {
        order: -1;
    }

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

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

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(10, 14, 26, 0.98);
        flex-direction: column;
        padding: 20px;
        gap: 15px;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-links.active {
        display: flex;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

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

    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero {
        text-align: center;
    }

    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }

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

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

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

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

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

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

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

    .solutions-tabs {
        gap: 10px;
    }

    .tab-btn {
        padding: 10px 20px;
        font-size: 0.85rem;
    }

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

    .stat-number {
        font-size: 1.8rem;
    }
}

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

    .section {
        padding: 60px 0;
    }

    .contact-form-wrapper {
        padding: 30px 20px;
    }
}