/* ========================================
   每日大赛 - 主样式文件
   深空黑+霓虹蓝紫渐变科技风格
   ======================================== */

/* 基础重置 */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --primary: #00d4ff;
    --secondary: #7b2fff;
    --accent: #ff6b9d;
    --bg-dark: #050a14;
    --bg-card: #0d1526;
    --bg-card2: #111d35;
    --text-main: #e8f0fe;
    --text-muted: #8a9bc4;
    --border: rgba(0, 212, 255, 0.15);
    --glow-blue: 0 0 20px rgba(0, 212, 255, 0.4);
    --glow-purple: 0 0 20px rgba(123, 47, 255, 0.4);
    --gradient-main: linear-gradient(135deg, #00d4ff 0%, #7b2fff 100%);
    --gradient-dark: linear-gradient(180deg, #050a14 0%, #0a1628 100%);
    --font-main: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --radius: 12px;
    --radius-lg: 20px;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.7;
    overflow-x: hidden;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: #fff;
}

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

ul, ol {
    list-style: none;
}

/* ========================================
   粒子背景
   ======================================== */
#particles-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    opacity: 0.4;
}

/* ========================================
   头部导航
   ======================================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(5, 10, 20, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

.site-header.scrolled {
    background: rgba(5, 10, 20, 0.98);
    box-shadow: 0 4px 30px rgba(0, 212, 255, 0.1);
}

.header-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.02em;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-main);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: var(--glow-blue);
}

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

.main-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.main-nav a {
    color: var(--text-muted);
    font-size: 0.95rem;
    padding: 8px 16px;
    border-radius: 8px;
    transition: var(--transition);
    white-space: nowrap;
}

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

.header-cta {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn-nav {
    background: var(--gradient-main);
    color: #fff !important;
    padding: 8px 20px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    box-shadow: var(--glow-blue);
    transition: var(--transition);
}

.btn-nav:hover {
    transform: translateY(-1px);
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.6);
}

/* 汉堡菜单 */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ========================================
   搜索框
   ======================================== */
.search-bar-wrap {
    background: rgba(13, 21, 38, 0.9);
    border-bottom: 1px solid var(--border);
    padding: 10px 0;
}

.search-bar-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.search-form {
    display: flex;
    align-items: center;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 6px 16px;
    width: 100%;
    max-width: 600px;
    gap: 10px;
    transition: var(--transition);
}

.search-form:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.2);
}

.search-form input {
    background: none;
    border: none;
    outline: none;
    color: var(--text-main);
    font-size: 0.9rem;
    width: 100%;
    font-family: var(--font-main);
}

.search-form input::placeholder {
    color: var(--text-muted);
}

.search-form button {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--primary);
    font-size: 1rem;
    padding: 0;
    display: flex;
    align-items: center;
}

.search-hot-tags {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.search-hot-tags span {
    color: var(--text-muted);
    font-size: 0.8rem;
    white-space: nowrap;
}

.hot-tag {
    font-size: 0.78rem;
    color: var(--text-muted);
    background: rgba(0, 212, 255, 0.06);
    border: 1px solid rgba(0, 212, 255, 0.15);
    padding: 3px 10px;
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.hot-tag:hover {
    color: var(--primary);
    border-color: var(--primary);
}

/* ========================================
   通用容器
   ======================================== */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 90px 0;
    position: relative;
    z-index: 1;
}

.section-alt {
    background: rgba(13, 21, 38, 0.6);
}

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

.section-tag {
    display: inline-block;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--primary);
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    padding: 4px 14px;
    border-radius: 20px;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(1.8rem, 3vw, 2.8rem);
    font-weight: 700;
    color: #fff;
    line-height: 1.3;
    margin-bottom: 16px;
}

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

.section-desc {
    font-size: 1.05rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ========================================
   按钮
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    font-family: var(--font-main);
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-main);
    color: #fff;
    box-shadow: var(--glow-blue);
}

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

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

.btn-outline:hover {
    background: rgba(0, 212, 255, 0.1);
    color: var(--primary);
    box-shadow: var(--glow-blue);
}

.btn-ghost {
    background: rgba(255,255,255,0.05);
    color: var(--text-main);
    border: 1px solid var(--border);
}

.btn-ghost:hover {
    background: rgba(255,255,255,0.1);
    color: #fff;
}

/* ========================================
   Hero Banner
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 120px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background-image: url('../images/banner-hero.jpg');
    background-size: cover;
    background-position: center;
    opacity: 0.25;
    z-index: 0;
}

.hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, rgba(5,10,20,0.3) 0%, rgba(5,10,20,0.8) 70%, var(--bg-dark) 100%);
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 20px;
    padding: 6px 16px;
    font-size: 0.85rem;
    color: var(--primary);
    margin-bottom: 24px;
    animation: fadeInDown 0.8s ease;
}

.hero-badge .dot {
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.hero-title {
    font-size: clamp(2.2rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.2;
    color: #fff;
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease 0.1s both;
}

.hero-title .brand {
    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-muted);
    line-height: 1.8;
    margin-bottom: 40px;
    max-width: 620px;
    animation: fadeInUp 0.8s ease 0.2s both;
}

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

.hero-stats {
    display: flex;
    gap: 48px;
    margin-top: 60px;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-stat-item {
    text-align: left;
}

.hero-stat-num {
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.hero-stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* 视频标识 */
.hero-video-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 107, 157, 0.15);
    border: 1px solid rgba(255, 107, 157, 0.4);
    border-radius: 20px;
    padding: 6px 16px;
    font-size: 0.85rem;
    color: var(--accent);
    margin-bottom: 12px;
}

/* ========================================
   视频卡片
   ======================================== */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

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

.video-card:hover {
    transform: translateY(-6px);
    border-color: var(--primary);
    box-shadow: 0 20px 60px rgba(0, 212, 255, 0.15);
}

.video-thumb {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
}

.video-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.video-card:hover .video-thumb img {
    transform: scale(1.05);
}

.video-play-btn {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.3);
    opacity: 0;
    transition: var(--transition);
}

.video-card:hover .video-play-btn {
    opacity: 1;
}

.play-circle {
    width: 60px;
    height: 60px;
    background: rgba(0, 212, 255, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.6);
    transition: transform 0.2s ease;
}

.video-card:hover .play-circle {
    transform: scale(1.1);
}

.play-circle svg {
    width: 24px;
    height: 24px;
    fill: #fff;
    margin-left: 3px;
}

.video-duration {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(0,0,0,0.75);
    color: #fff;
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 4px;
}

.video-tag {
    position: absolute;
    top: 10px;
    left: 10px;
    background: var(--gradient-main);
    color: #fff;
    font-size: 0.72rem;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 4px;
}

.video-info {
    padding: 16px;
}

.video-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 8px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.video-stats {
    display: flex;
    gap: 12px;
}

.video-stats span {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* ========================================
   产品卡片
   ======================================== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

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

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-main);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

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

.product-card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: 0 20px 60px rgba(0, 212, 255, 0.1);
}

.product-icon {
    width: 56px;
    height: 56px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    margin-bottom: 20px;
    transition: var(--transition);
}

.product-card:hover .product-icon {
    background: rgba(0, 212, 255, 0.2);
    box-shadow: var(--glow-blue);
}

.product-name {
    font-size: 1.15rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
}

.product-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 20px;
}

.product-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.tag {
    font-size: 0.75rem;
    color: var(--primary);
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid rgba(0, 212, 255, 0.2);
    padding: 3px 10px;
    border-radius: 12px;
}

/* ========================================
   技术引擎
   ======================================== */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.tech-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    display: flex;
    gap: 20px;
    transition: var(--transition);
}

.tech-card:hover {
    border-color: rgba(123, 47, 255, 0.4);
    box-shadow: 0 10px 40px rgba(123, 47, 255, 0.1);
    transform: translateY(-3px);
}

.tech-icon {
    width: 50px;
    height: 50px;
    min-width: 50px;
    background: rgba(123, 47, 255, 0.1);
    border: 1px solid rgba(123, 47, 255, 0.2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
}

.tech-content h4 {
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 8px;
}

.tech-content p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.tech-progress {
    margin-top: 12px;
}

.progress-bar {
    height: 4px;
    background: rgba(255,255,255,0.08);
    border-radius: 2px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-main);
    border-radius: 2px;
    transition: width 1.5s ease;
}

/* ========================================
   解决方案
   ======================================== */
.solution-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

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

.solution-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 60px rgba(0, 212, 255, 0.12);
}

.solution-img {
    aspect-ratio: 16/9;
    overflow: hidden;
}

.solution-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.solution-card:hover .solution-img img {
    transform: scale(1.05);
}

.solution-body {
    padding: 24px;
}

.solution-body h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
}

.solution-body p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 16px;
}

.solution-link {
    font-size: 0.88rem;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.solution-link:hover {
    gap: 10px;
}

/* ========================================
   流程步骤
   ======================================== */
.process-steps {
    display: flex;
    gap: 0;
    position: relative;
}

.process-steps::before {
    content: '';
    position: absolute;
    top: 40px;
    left: 10%;
    right: 10%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
    z-index: 0;
}

.process-step {
    flex: 1;
    text-align: center;
    padding: 0 16px;
    position: relative;
    z-index: 1;
}

.step-num {
    width: 80px;
    height: 80px;
    background: var(--bg-card);
    border: 2px solid var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0 auto 20px;
    box-shadow: var(--glow-blue);
    background-color: var(--bg-card);
}

.step-title {
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
}

.step-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ========================================
   案例
   ======================================== */
.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 24px;
}

.case-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: var(--transition);
}

.case-card:hover {
    border-color: rgba(0, 212, 255, 0.3);
    transform: translateY(-4px);
    box-shadow: 0 20px 50px rgba(0, 212, 255, 0.1);
}

.case-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
}

.case-logo {
    width: 48px;
    height: 48px;
    background: var(--gradient-main);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: #fff;
    font-weight: 700;
}

.case-company {
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
}

.case-industry {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.case-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 20px;
}

.case-metrics {
    display: flex;
    gap: 24px;
}

.metric {
    text-align: center;
}

.metric-num {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.metric-label {
    font-size: 0.78rem;
    color: var(--text-muted);
}

/* ========================================
   新闻动态
   ======================================== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

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

.news-card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: 0 15px 40px rgba(0, 212, 255, 0.1);
}

.news-img {
    aspect-ratio: 16/9;
    overflow: hidden;
}

.news-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.news-card:hover .news-img img {
    transform: scale(1.05);
}

.news-body {
    padding: 20px;
}

.news-category {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 8px;
}

.news-title {
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
    line-height: 1.4;
}

.news-excerpt {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ========================================
   用户评价
   ======================================== */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

.review-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: var(--transition);
    position: relative;
}

.review-card:hover {
    border-color: rgba(123, 47, 255, 0.3);
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(123, 47, 255, 0.1);
}

.review-quote {
    font-size: 2rem;
    color: var(--primary);
    opacity: 0.3;
    line-height: 1;
    margin-bottom: 12px;
}

.review-text {
    font-size: 0.92rem;
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 20px;
}

.review-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.review-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--gradient-main);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: #fff;
    font-weight: 700;
    flex-shrink: 0;
}

.review-name {
    font-size: 0.95rem;
    font-weight: 700;
    color: #fff;
}

.review-role {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.review-stars {
    color: #ffd700;
    font-size: 0.85rem;
    margin-top: 4px;
}

/* ========================================
   FAQ
   ======================================== */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 12px;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item.open {
    border-color: rgba(0, 212, 255, 0.3);
}

.faq-question {
    padding: 20px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    font-size: 0.98rem;
    font-weight: 600;
    color: #fff;
    gap: 16px;
    user-select: none;
}

.faq-question:hover {
    color: var(--primary);
}

.faq-icon {
    width: 24px;
    height: 24px;
    min-width: 24px;
    border: 1px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    color: var(--primary);
    transition: transform 0.3s ease;
}

.faq-item.open .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.faq-item.open .faq-answer {
    max-height: 300px;
}

.faq-answer-inner {
    padding: 0 24px 20px;
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.8;
}

/* ========================================
   联系我们
   ======================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.contact-info h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
}

.contact-info p {
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 32px;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

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

.contact-item-icon {
    width: 44px;
    height: 44px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.contact-item-text {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.contact-item-text strong {
    display: block;
    color: #fff;
    margin-bottom: 2px;
}

.contact-form {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
}

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

.form-group label {
    display: block;
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px 16px;
    color: var(--text-main);
    font-size: 0.9rem;
    font-family: var(--font-main);
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.15);
}

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

/* ========================================
   合作伙伴
   ======================================== */
.partners-row {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 32px;
}

.partner-logo {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 28px;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-muted);
    transition: var(--transition);
    white-space: nowrap;
}

.partner-logo:hover {
    border-color: var(--primary);
    color: var(--primary);
    box-shadow: var(--glow-blue);
}

/* ========================================
   页脚
   ======================================== */
.site-footer {
    background: rgba(5, 10, 20, 0.98);
    border-top: 1px solid var(--border);
    padding: 60px 0 0;
    position: relative;
    z-index: 1;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.8;
    margin: 16px 0 24px;
    max-width: 280px;
}

.footer-social {
    display: flex;
    gap: 10px;
}

.social-btn {
    width: 36px;
    height: 36px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    color: var(--text-muted);
    transition: var(--transition);
}

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

.footer-col h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 20px;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a {
    font-size: 0.88rem;
    color: var(--text-muted);
    transition: var(--transition);
}

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

.footer-bottom {
    border-top: 1px solid var(--border);
    padding: 20px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-bottom p {
    font-size: 0.82rem;
    color: var(--text-muted);
}

.footer-bottom a {
    color: var(--text-muted);
    font-size: 0.82rem;
}

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

/* ========================================
   面包屑
   ======================================== */
.breadcrumb {
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 0;
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-muted);
    flex-wrap: wrap;
}

.breadcrumb-list a {
    color: var(--text-muted);
}

.breadcrumb-list a:hover {
    color: var(--primary);
}

.breadcrumb-list .sep {
    color: var(--border);
}

.breadcrumb-list .current {
    color: var(--primary);
}

/* ========================================
   内页 Hero
   ======================================== */
.page-hero {
    padding: 140px 0 80px;
    background: linear-gradient(180deg, rgba(0, 212, 255, 0.05) 0%, transparent 100%);
    border-bottom: 1px solid var(--border);
    position: relative;
    z-index: 1;
}

.page-hero h1 {
    font-size: clamp(1.8rem, 3.5vw, 3rem);
    font-weight: 800;
    color: #fff;
    margin-bottom: 16px;
}

.page-hero p {
    font-size: 1.05rem;
    color: var(--text-muted);
    max-width: 600px;
    line-height: 1.8;
}

/* ========================================
   动画
   ======================================== */
@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

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

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

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

@keyframes glow-pulse {
    0%, 100% { box-shadow: 0 0 20px rgba(0, 212, 255, 0.3); }
    50% { box-shadow: 0 0 40px rgba(0, 212, 255, 0.6); }
}

.animate-float {
    animation: float 4s ease-in-out infinite;
}

.animate-glow {
    animation: glow-pulse 3s ease-in-out infinite;
}

/* 滚动动画 */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ========================================
   滚动条
   ======================================== */
::-webkit-scrollbar {
    width: 6px;
}

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

::-webkit-scrollbar-thumb {
    background: rgba(0, 212, 255, 0.3);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 212, 255, 0.5);
}

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

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

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

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

@media (max-width: 768px) {
    .main-nav {
        display: none;
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(5, 10, 20, 0.98);
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border);
        gap: 4px;
    }

    .main-nav.open {
        display: flex;
    }

    .main-nav a {
        padding: 12px 16px;
        border-radius: 8px;
        width: 100%;
    }

    .hamburger {
        display: flex;
    }

    .header-cta .btn-nav {
        display: none;
    }

    .hero-stats {
        gap: 24px;
    }

    .hero-stat-num {
        font-size: 1.5rem;
    }

    .process-steps {
        flex-direction: column;
        gap: 32px;
    }

    .process-steps::before {
        display: none;
    }

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

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .search-hot-tags {
        display: none;
    }

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

    .section {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    .hero-actions {
        flex-direction: column;
    }

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

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

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

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

/* ========================================
   辅助类
   ======================================== */
.text-center { text-align: center; }
.text-gradient {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-16 { gap: 16px; }
.gap-24 { gap: 24px; }

/* 内页样式 */
.inner-content {
    padding: 60px 0;
    position: relative;
    z-index: 1;
}

.inner-content h2 {
    font-size: 1.6rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
    margin-top: 40px;
}

.inner-content h2:first-child {
    margin-top: 0;
}

.inner-content p {
    color: var(--text-muted);
    line-height: 1.9;
    margin-bottom: 16px;
}

.inner-content ul {
    list-style: disc;
    padding-left: 24px;
    color: var(--text-muted);
    line-height: 2;
    margin-bottom: 16px;
}

.highlight-box {
    background: rgba(0, 212, 255, 0.05);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-left: 3px solid var(--primary);
    border-radius: 8px;
    padding: 20px 24px;
    margin: 24px 0;
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.8;
}

/* 视频播放模态框 */
.video-modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.9);
    z-index: 9999;
    align-items: center;
    justify-content: center;
}

.video-modal.open {
    display: flex;
}

.video-modal-inner {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 24px;
    max-width: 800px;
    width: 90%;
    position: relative;
}

.video-modal-close {
    position: absolute;
    top: -12px;
    right: -12px;
    width: 36px;
    height: 36px;
    background: var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: #fff;
    font-size: 1.2rem;
    border: none;
}

.video-placeholder {
    aspect-ratio: 16/9;
    background: #000;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 1rem;
}