/* ===== 基础样式 ===== */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #06b6d4;
    --accent: #f59e0b;
    --dark: #0f172a;
    --dark-light: #1e293b;
    --dark-lighter: #334155;
    --light: #f8fafc;
    --gray: #94a3b8;
    --gray-light: #e2e8f0;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --gradient-1: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #d946ef 100%);
    --gradient-2: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
    --gradient-3: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
    --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.05);
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
    --shadow-glow: 0 0 40px rgba(99,102,241,0.3);
    --radius: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--dark); background: var(--light); line-height: 1.6; overflow-x: hidden;
}
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }
img { max-width: 100%; height: auto; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

/* ===== 按钮样式 ===== */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 12px 28px; border-radius: 50px; font-weight: 500; font-size: 15px;
    border: none; cursor: pointer; transition: var(--transition); white-space: nowrap;
}
.btn-primary {
    background: var(--gradient-1); color: white; box-shadow: 0 4px 15px rgba(99,102,241,0.4);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(99,102,241,0.5); }
.btn-outline { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: white; }
.btn-outline-light {
    background: rgba(255,255,255,0.1); color: white; border: 1px solid rgba(255,255,255,0.3);
    backdrop-filter: blur(10px);
}
.btn-outline-light:hover { background: rgba(255,255,255,0.2); }
.btn-glow {
    background: var(--gradient-1); color: white;
    box-shadow: 0 0 30px rgba(99,102,241,0.5), 0 4px 15px rgba(99,102,241,0.4);
    position: relative; overflow: hidden;
}
.btn-glow::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: 0.5s;
}
.btn-glow:hover::before { left: 100%; }
.btn-glow:hover { transform: translateY(-2px); box-shadow: 0 0 40px rgba(99,102,241,0.6), 0 8px 25px rgba(99,102,241,0.5); }
.btn-block { width: 100%; }

/* ===== 加载动画 ===== */
.loader {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: var(--dark); display: flex; align-items: center; justify-content: center;
    z-index: 99999; transition: opacity 0.5s, visibility 0.5s;
}
.loader.hidden { opacity: 0; visibility: hidden; }
.loader-content { text-align: center; }
.loader-ring {
    width: 80px; height: 80px; border: 4px solid rgba(99,102,241,0.2);
    border-top-color: var(--primary); border-radius: 50%;
    animation: spin 1s linear infinite; margin: 0 auto 20px;
}
.loader-text {
    font-size: 24px; font-weight: 700; background: var(--gradient-1);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text; letter-spacing: 4px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== 导航栏 ===== */
.navbar {
    position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
    padding: 16px 0; transition: var(--transition);
}
.navbar.scrolled {
    background: rgba(15,23,42,0.95); backdrop-filter: blur(20px);
    padding: 12px 0; box-shadow: var(--shadow-lg);
}
.nav-container {
    max-width: 1280px; margin: 0 auto; padding: 0 24px;
    display: flex; align-items: center; justify-content: space-between;
}
.nav-logo { display: flex; align-items: center; }
.logo-img { height: 40px; width: auto; }
.logo-icon {
    width: 44px; height: 44px; background: var(--gradient-1);
    border-radius: 12px; display: flex; align-items: center; justify-content: center;
    color: white; font-size: 20px; box-shadow: 0 4px 15px rgba(99,102,241,0.4);
}
.logo-text { display: flex; flex-direction: column; }
.logo-main { font-size: 18px; font-weight: 700; color: white; line-height: 1.2; }
.logo-sub { font-size: 11px; color: var(--gray); letter-spacing: 2px; font-weight: 500; }
.nav-menu { display: flex; align-items: center; gap: 4px; }
.nav-link {
    padding: 8px 16px; color: rgba(255,255,255,0.7); font-size: 14px; font-weight: 500;
    border-radius: 8px; position: relative;
}
.nav-link:hover, .nav-link.active { color: white; background: rgba(99,102,241,0.2); }
.nav-link::after {
    content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%);
    width: 0; height: 2px; background: var(--gradient-1); transition: var(--transition); border-radius: 2px;
}
.nav-link:hover::after, .nav-link.active::after { width: 60%; }
.nav-actions { display: flex; align-items: center; gap: 16px; }
.mobile-toggle {
    display: none; flex-direction: column; gap: 5px;
    background: none; border: none; cursor: pointer; padding: 5px;
}
.mobile-toggle span { width: 24px; height: 2px; background: white; border-radius: 2px; transition: var(--transition); }

/* ===== 英雄区域 ===== */
.hero {
    position: relative; min-height: 100vh; display: flex; align-items: center;
    justify-content: center; overflow: hidden; background: var(--dark);
}
.hero-bg { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
.hero-particles {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(99,102,241,0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(139,92,246,0.15) 0%, transparent 50%),
        radial-gradient(circle at 50% 80%, rgba(6,182,212,0.1) 0%, transparent 50%);
}
.hero-gradient {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(180deg, rgba(15,23,42,0.3) 0%, rgba(15,23,42,0.8) 100%);
}
.hero-content { position: relative; z-index: 2; text-align: center; max-width: 900px; padding: 0 24px; padding-top: 80px; }
.hero-badge {
    display: inline-flex; align-items: center; gap: 8px; padding: 8px 20px;
    background: rgba(99,102,241,0.15); border: 1px solid rgba(99,102,241,0.3);
    border-radius: 50px; color: var(--primary-light); font-size: 14px;
    margin-bottom: 32px; animation: fadeInDown 0.8s ease;
}
.hero-badge i { color: var(--accent); }
.hero-title { font-size: clamp(36px, 6vw, 64px); font-weight: 900; line-height: 1.1; margin-bottom: 24px; color: white; }
.title-line { display: block; animation: fadeInUp 0.8s ease forwards; opacity: 0; }
.title-line:nth-child(2) { animation-delay: 0.2s; }
.title-line.highlight {
    background: var(--gradient-1); -webkit-background-clip: text;
    -webkit-text-fill-color: transparent; background-clip: text;
}
.hero-desc {
    font-size: 18px; color: rgba(255,255,255,0.7); max-width: 700px;
    margin: 0 auto 40px; line-height: 1.8;
    animation: fadeInUp 0.8s ease 0.4s forwards; opacity: 0;
}
.hero-buttons {
    display: flex; gap: 16px; justify-content: center; margin-bottom: 60px;
    animation: fadeInUp 0.8s ease 0.6s forwards; opacity: 0;
}
.hero-stats {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
    max-width: 700px; margin: 0 auto;
    animation: fadeInUp 0.8s ease 0.8s forwards; opacity: 0;
}
.stat-item {
    text-align: center; padding: 20px;
    background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius); backdrop-filter: blur(10px);
}
.stat-number { font-size: 36px; font-weight: 900; background: var(--gradient-1); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.stat-suffix { font-size: 24px; font-weight: 700; color: var(--primary-light); }
.stat-label { display: block; font-size: 13px; color: rgba(255,255,255,0.5); margin-top: 4px; }
.hero-scroll { position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%); text-align: center; color: rgba(255,255,255,0.5); font-size: 12px; animation: fadeIn 1s ease 1.2s forwards; opacity: 0; }
.scroll-mouse { width: 24px; height: 40px; border: 2px solid rgba(255,255,255,0.3); border-radius: 12px; margin: 0 auto 8px; position: relative; }
.scroll-wheel { width: 4px; height: 8px; background: rgba(255,255,255,0.5); border-radius: 2px; position: absolute; top: 8px; left: 50%; transform: translateX(-50%); animation: scrollWheel 2s ease infinite; }
@keyframes scrollWheel { 0%, 100% { top: 8px; opacity: 1; } 50% { top: 20px; opacity: 0; } }

/* ===== 通用区块样式 ===== */
section { padding: 100px 0; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-header.light .section-tag, .section-header.light .section-title, .section-header.light .section-desc { color: white; }
.section-tag {
    display: inline-block; padding: 6px 16px; background: rgba(99,102,241,0.1);
    color: var(--primary); font-size: 12px; font-weight: 600; letter-spacing: 3px;
    border-radius: 50px; margin-bottom: 16px;
}
.section-title { font-size: clamp(28px, 4vw, 42px); font-weight: 800; margin-bottom: 16px; color: var(--dark); }
.section-desc { font-size: 16px; color: var(--gray); max-width: 600px; margin: 0 auto; }

/* ===== 荣誉资质 ===== */
.honors { background: var(--light); }
.honors-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; max-width: 800px; margin: 0 auto; }
.honor-card {
    background: white; border-radius: var(--radius-lg); padding: 40px; text-align: center;
    box-shadow: var(--shadow); transition: var(--transition); border: 2px solid transparent;
}
.honor-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-xl); border-color: var(--primary); }
.honor-icon { width: 80px; height: 80px; background: var(--gradient-1); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: white; font-size: 32px; margin: 0 auto 20px; }
.honor-card h3 { font-size: 20px; font-weight: 700; color: var(--dark); margin-bottom: 12px; }
.honor-card p { font-size: 14px; color: var(--gray); line-height: 1.7; }

/* ===== 关于我们 ===== */
.about { background: white; }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.about-image { position: relative; }
.about-img-wrapper { position: relative; }
.img-placeholder {
    background: var(--gradient-1); border-radius: var(--radius-lg);
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    color: white; gap: 12px; box-shadow: var(--shadow-xl);
}
.img-placeholder i { font-size: 48px; opacity: 0.9; }
.img-placeholder span { font-size: 14px; font-weight: 500; }
.about-img-1 { width: 100%; height: 400px; }
.about-img-2 { width: 200px; height: 200px; position: absolute; bottom: -30px; right: -30px; background: var(--gradient-2); border: 4px solid white; }
.about-experience {
    position: absolute; top: -20px; left: -20px; background: white; padding: 24px 32px;
    border-radius: var(--radius); box-shadow: var(--shadow-xl); text-align: center; border: 2px solid var(--primary);
}
.exp-number { display: block; font-size: 42px; font-weight: 900; background: var(--gradient-1); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; line-height: 1; }
.exp-text { font-size: 13px; color: var(--gray); font-weight: 500; }
.about-content h3 { font-size: 28px; font-weight: 700; margin-bottom: 20px; color: var(--dark); }
.about-content p { color: var(--gray); margin-bottom: 16px; line-height: 1.8; }
.about-features { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 32px; }
.feature-item { display: flex; align-items: flex-start; gap: 12px; padding: 16px; background: var(--light); border-radius: var(--radius); transition: var(--transition); }
.feature-item:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.feature-icon { width: 44px; height: 44px; min-width: 44px; background: var(--gradient-1); border-radius: 10px; display: flex; align-items: center; justify-content: center; color: white; font-size: 18px; }
.feature-text h4 { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.feature-text p { font-size: 13px; color: var(--gray); margin: 0; }

/* ===== 核心产品 ===== */
.products { background: var(--dark); position: relative; overflow: hidden; }
.products::before {
    content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background-image: radial-gradient(circle at 10% 20%, rgba(99,102,241,0.1) 0%, transparent 40%), radial-gradient(circle at 90% 80%, rgba(6,182,212,0.1) 0%, transparent 40%);
}
.products-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; position: relative; z-index: 1; }
.product-card {
    background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-lg); padding: 32px; transition: var(--transition); position: relative; overflow: hidden;
}
.product-card::before {
    content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: var(--gradient-1); opacity: 0; transition: var(--transition);
}
.product-card:hover { transform: translateY(-8px); border-color: rgba(99,102,241,0.3); box-shadow: var(--shadow-glow); }
.product-card:hover::before { opacity: 0.05; }
.product-card.featured { grid-row: span 2; background: rgba(99,102,241,0.1); border-color: rgba(99,102,241,0.3); }
.product-badge {
    position: absolute; top: 16px; right: 16px; padding: 4px 12px;
    background: var(--gradient-1); color: white; font-size: 12px; font-weight: 600;
    border-radius: 50px; z-index: 2;
}
.product-icon { width: 60px; height: 60px; background: var(--gradient-1); border-radius: 16px; display: flex; align-items: center; justify-content: center; color: white; font-size: 24px; margin-bottom: 20px; position: relative; z-index: 2; }
.product-card h3 { font-size: 20px; font-weight: 700; color: white; margin-bottom: 12px; position: relative; z-index: 2; }
.product-card p { font-size: 14px; color: rgba(255,255,255,0.6); margin-bottom: 20px; line-height: 1.7; position: relative; z-index: 2; }
.product-features { margin-bottom: 24px; position: relative; z-index: 2; }
.product-features li { display: flex; align-items: center; gap: 8px; padding: 6px 0; font-size: 13px; color: rgba(255,255,255,0.7); }
.product-features li i { color: var(--success); font-size: 12px; }
.product-card .btn { position: relative; z-index: 2; }

/* ===== 解决方案 ===== */
.solutions { background: white; }
.solutions-tabs { max-width: 1000px; margin: 0 auto; }
.tab-nav { display: flex; justify-content: center; gap: 12px; margin-bottom: 40px; flex-wrap: wrap; }
.tab-btn {
    display: flex; align-items: center; gap: 8px; padding: 12px 24px;
    background: var(--light); border: 2px solid transparent; border-radius: 50px;
    font-size: 14px; font-weight: 600; color: var(--dark); cursor: pointer; transition: var(--transition);
}
.tab-btn i { font-size: 16px; color: var(--primary); }
.tab-btn:hover { background: rgba(99,102,241,0.1); }
.tab-btn.active { background: var(--gradient-1); color: white; border-color: var(--primary); box-shadow: 0 4px 15px rgba(99,102,241,0.3); }
.tab-btn.active i { color: white; }
.tab-panel { display: none; animation: fadeIn 0.5s ease; }
.tab-panel.active { display: block; }
.solution-card { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; background: var(--light); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
.solution-image { height: 100%; min-height: 400px; }
.solution-img-placeholder { width: 100%; height: 100%; background: var(--gradient-1); display: flex; flex-direction: column; align-items: center; justify-content: center; color: white; gap: 16px; }
.solution-img-placeholder i { font-size: 80px; opacity: 0.8; }
.solution-img-placeholder span { font-size: 18px; font-weight: 600; }
.solution-info { padding: 40px; }
.solution-info h3 { font-size: 24px; font-weight: 700; margin-bottom: 16px; color: var(--dark); }
.solution-info p { color: var(--gray); line-height: 1.8; margin-bottom: 24px; }
.solution-scenarios { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.scenario-tag { padding: 6px 14px; background: rgba(99,102,241,0.1); color: var(--primary); font-size: 13px; font-weight: 500; border-radius: 50px; }
.solution-features { display: flex; flex-direction: column; gap: 12px; }
.sol-feature { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--dark); }
.sol-feature i { color: var(--success); font-size: 16px; }

/* ===== 技术优势 ===== */
.advantages { background: var(--dark); position: relative; }
.advantages-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.advantage-card {
    background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-lg); padding: 40px 32px; position: relative; overflow: hidden; transition: var(--transition);
}
.advantage-card::before {
    content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 3px;
    background: var(--gradient-1); transform: scaleX(0); transition: var(--transition);
}
.advantage-card:hover { transform: translateY(-4px); border-color: rgba(99,102,241,0.3); box-shadow: var(--shadow-glow); }
.advantage-card:hover::before { transform: scaleX(1); }
.advantage-number { position: absolute; top: 20px; right: 24px; font-size: 48px; font-weight: 900; color: rgba(255,255,255,0.05); line-height: 1; }
.advantage-icon { width: 56px; height: 56px; background: var(--gradient-1); border-radius: 14px; display: flex; align-items: center; justify-content: center; color: white; font-size: 24px; margin-bottom: 20px; }
.advantage-card h3 { font-size: 18px; font-weight: 700; color: white; margin-bottom: 12px; }
.advantage-card p { font-size: 14px; color: rgba(255,255,255,0.6); line-height: 1.7; }

/* ===== 案例展示 ===== */
.cases { background: white; }
.cases-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
.case-card { background: var(--light); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow); transition: var(--transition); }
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-xl); }
.case-image { position: relative; height: 240px; overflow: hidden; }
.case-img-placeholder { width: 100%; height: 100%; background: var(--gradient-2); display: flex; flex-direction: column; align-items: center; justify-content: center; color: white; gap: 12px; }
.case-img-placeholder i { font-size: 48px; opacity: 0.9; }
.case-img-placeholder span { font-size: 16px; font-weight: 600; }
.case-overlay { position: absolute; top: 16px; left: 16px; }
.case-category { padding: 6px 14px; background: rgba(0,0,0,0.6); color: white; font-size: 12px; font-weight: 600; border-radius: 50px; backdrop-filter: blur(10px); }
.case-content { padding: 28px; }
.case-content h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; color: var(--dark); }
.case-content p { font-size: 14px; color: var(--gray); line-height: 1.7; margin-bottom: 16px; }
.case-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.case-tags span { padding: 4px 12px; background: rgba(99,102,241,0.1); color: var(--primary); font-size: 12px; font-weight: 500; border-radius: 50px; }

/* ===== 定制流程 ===== */
.process { background: var(--dark); position: relative; }
.process-timeline { position: relative; max-width: 1000px; margin: 0 auto; display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.process-line { position: absolute; top: 40px; left: 10%; right: 10%; height: 3px; background: linear-gradient(90deg, var(--primary), var(--secondary)); border-radius: 3px; }
.process-step { text-align: center; position: relative; z-index: 1; }
.process-dot { width: 50px; height: 50px; background: var(--gradient-1); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: white; font-size: 18px; font-weight: 700; margin: 0 auto 20px; box-shadow: 0 4px 15px rgba(99,102,241,0.4); border: 3px solid var(--dark); }
.process-content { padding: 0 10px; }
.process-icon { width: 48px; height: 48px; background: rgba(99,102,241,0.2); border-radius: 12px; display: flex; align-items: center; justify-content: center; color: var(--primary-light); font-size: 20px; margin: 0 auto 12px; }
.process-content h3 { font-size: 16px; font-weight: 700; color: white; margin-bottom: 8px; }
.process-content p { font-size: 13px; color: rgba(255,255,255,0.5); line-height: 1.6; }

/* ===== 新闻动态 ===== */
.news { background: var(--light); }
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card { background: white; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: var(--transition); }
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-xl); }
.news-image { height: 180px; background: var(--gradient-1); display: flex; align-items: center; justify-content: center; color: white; font-size: 48px; }
.news-content { padding: 24px; }
.news-date { font-size: 12px; color: var(--primary); font-weight: 600; margin-bottom: 8px; }
.news-content h3 { font-size: 16px; font-weight: 700; margin-bottom: 10px; color: var(--dark); line-height: 1.4; }
.news-content p { font-size: 13px; color: var(--gray); line-height: 1.6; margin-bottom: 16px; }
.news-link { font-size: 13px; color: var(--primary); font-weight: 600; display: flex; align-items: center; gap: 6px; }
.news-link:hover { gap: 10px; }
.news-loading { grid-column: 1 / -1; text-align: center; padding: 60px; color: var(--gray); }
.news-loading i { font-size: 32px; margin-bottom: 12px; display: block; }
.news-more { text-align: center; margin-top: 40px; }

/* ===== 合作伙伴 ===== */
.partners { background: white; padding: 60px 0; }
.partners-marquee { overflow: hidden; mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent); -webkit-mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent); }
.partners-track { display: flex; gap: 40px; animation: marquee 30s linear infinite; width: max-content; }
.partners-track:hover { animation-play-state: paused; }
.partner-logo { padding: 0; background: var(--light); border-radius: var(--radius); min-width: 160px; height: 60px; transition: var(--transition); overflow: hidden; }
.partner-logo:hover { transform: scale(1.05); }
.partner-logo img { width: 100%; height: 100%; object-fit: cover; }
@keyframes marquee { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* ===== 联系我们 ===== */
.contact { background: var(--dark); position: relative; }
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 60px; align-items: start; }
.contact-info h3 { font-size: 24px; font-weight: 700; color: white; margin-bottom: 32px; }
.contact-item { display: flex; align-items: flex-start; gap: 16px; margin-bottom: 24px; }
.contact-icon { width: 48px; height: 48px; min-width: 48px; background: rgba(99,102,241,0.2); border-radius: 12px; display: flex; align-items: center; justify-content: center; color: var(--primary-light); font-size: 18px; }
.contact-text h4 { font-size: 15px; font-weight: 600; color: white; margin-bottom: 4px; }
.contact-text p { font-size: 14px; color: rgba(255,255,255,0.6); }
.contact-social { margin-top: 32px; }
.contact-social h4 { font-size: 15px; font-weight: 600; color: white; margin-bottom: 16px; }
.social-links { display: flex; gap: 12px; }
.social-link { width: 44px; height: 44px; background: rgba(255,255,255,0.1); border-radius: 12px; display: flex; align-items: center; justify-content: center; color: white; font-size: 18px; transition: var(--transition); }
.social-link:hover { background: var(--gradient-1); transform: translateY(-2px); }
.contact-form-wrapper { background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1); border-radius: var(--radius-lg); padding: 40px; }
.contact-form h3 { font-size: 22px; font-weight: 700; color: white; margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; color: rgba(255,255,255,0.7); margin-bottom: 6px; }
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 12px 16px; background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15); border-radius: 10px; color: white;
    font-size: 14px; font-family: inherit; transition: var(--transition);
}
.form-group input::placeholder, .form-group textarea::placeholder { color: rgba(255,255,255,0.3); }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none; border-color: var(--primary); background: rgba(255,255,255,0.12);
    box-shadow: 0 0 0 3px rgba(99,102,241,0.2);
}
.form-group select { cursor: pointer; appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='white' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 16px center; }
.form-group select option { background: var(--dark); color: white; }
.form-group textarea { resize: vertical; min-height: 100px; }

/* ===== 页脚 ===== */
.footer { background: #0a0f1c; padding: 80px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 60px; }
.footer-logo { margin-bottom: 20px; }
.footer-logo-img { height: 36px; width: auto; }
.footer-brand p { font-size: 14px; color: rgba(255,255,255,0.5); line-height: 1.7; margin-bottom: 20px; }
.footer-qr { margin-top: 20px; }
.qr-img { width: 100px; height: 100px; border-radius: 12px; object-fit: cover; display: block; }
.qr-text { margin-top: 10px; font-size: 13px; color: rgba(255,255,255,0.7); font-weight: 500; text-align: center; width: 100px; }
.footer-links h4 { font-size: 16px; font-weight: 700; color: white; margin-bottom: 20px; }
.footer-links ul li { margin-bottom: 12px; }
.footer-links ul li a { font-size: 14px; color: rgba(255,255,255,0.5); transition: var(--transition); }
.footer-links ul li a:hover { color: var(--primary-light); padding-left: 4px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 24px 0; text-align: center; }
.footer-bottom p { font-size: 13px; color: rgba(255,255,255,0.4); margin-bottom: 4px; }
.footer-bottom a { color: rgba(255,255,255,0.4); }
.footer-bottom a:hover { color: var(--primary-light); }

/* ===== 回到顶部 ===== */
.back-to-top {
    position: fixed; bottom: 30px; right: 30px; width: 48px; height: 48px;
    background: var(--gradient-1); border: none; border-radius: 50%; color: white;
    font-size: 16px; cursor: pointer; opacity: 0; visibility: hidden;
    transition: var(--transition); z-index: 999; box-shadow: 0 4px 15px rgba(99,102,241,0.4);
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { transform: translateY(-4px); box-shadow: 0 8px 25px rgba(99,102,241,0.5); }

/* ===== Toast提示 ===== */
.toast {
    position: fixed; top: 100px; right: 30px; background: white; padding: 16px 24px;
    border-radius: var(--radius); box-shadow: var(--shadow-xl); display: flex; align-items: center;
    gap: 12px; z-index: 10000; transform: translateX(150%);
    transition: transform 0.4s cubic-bezier(0.68, -0.55, 0.27, 1.55); border-left: 4px solid var(--success);
}
.toast.show { transform: translateX(0); }
.toast-icon { color: var(--success); font-size: 20px; }
.toast-message { font-size: 14px; font-weight: 500; color: var(--dark); }

/* ===== 动画 ===== */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeInDown { from { opacity: 0; transform: translateY(-20px); } to { opacity: 1; transform: translateY(0); } }

/* ===== 滚动动画 ===== */
.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) {
    .products-grid { grid-template-columns: repeat(2, 1fr); }
    .product-card.featured { grid-row: span 1; }
    .advantages-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .nav-menu { position: fixed; top: 0; right: -100%; width: 80%; max-width: 320px; height: 100vh; background: var(--dark); flex-direction: column; padding: 80px 24px 24px; transition: var(--transition); z-index: 999; }
    .nav-menu.active { right: 0; }
    .nav-link { padding: 12px 0; font-size: 16px; width: 100%; }
    .mobile-toggle { display: flex; z-index: 1000; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); }
    .about-grid { grid-template-columns: 1fr; }
    .about-img-2 { width: 150px; height: 150px; right: 0; }
    .products-grid { grid-template-columns: 1fr; }
    .solution-card { grid-template-columns: 1fr; }
    .solution-image { min-height: 200px; }
    .advantages-grid { grid-template-columns: 1fr; }
    .cases-grid { grid-template-columns: 1fr; }
    .process-timeline { grid-template-columns: 1fr; gap: 30px; }
    .process-line { display: none; }
    .news-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    .hero-buttons { flex-direction: column; }
    section { padding: 60px 0; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 32px; }
    .hero-desc { font-size: 15px; }
    .stat-number { font-size: 28px; }
    .section-title { font-size: 26px; }
    .tab-nav { gap: 8px; }
    .tab-btn { padding: 8px 16px; font-size: 13px; }
}