/* ============================================
   探路数字科技 - 企业官网统一样式 v3 Premium
   ============================================ */
:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #dbeafe;
    --primary-50: #eff6ff;
    --accent: #06b6d4;
    --accent-dark: #0891b2;
    --accent-light: #cffafe;
    --warm: #f59e0b;
    --warm-light: #fef3c7;
    --success: #10b981;
    --success-light: #d1fae5;
    --rose: #f43f5e;
    --violet: #8b5cf6;
    --violet-light: #ede9fe;
    --slate-950: #020617;
    --slate-900: #0f172a;
    --slate-800: #1e293b;
    --slate-700: #334155;
    --slate-600: #475569;
    --slate-500: #64748b;
    --slate-400: #94a3b8;
    --slate-300: #cbd5e1;
    --slate-200: #e2e8f0;
    --slate-100: #f1f5f9;
    --slate-50: #f8fafc;
    --white: #ffffff;
    --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #0f172a 100%);
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #0891b2 100%);
    --gradient-accent: linear-gradient(135deg, #0891b2 0%, #2563eb 100%);
    --gradient-warm: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
    --gradient-card: linear-gradient(135deg, #f8fafc 0%, #eff6ff 100%);
    --gradient-dark-card: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.04), 0 2px 4px rgba(0,0,0,0.03);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.06), 0 4px 10px rgba(0,0,0,0.04);
    --shadow-xl: 0 20px 40px rgba(0,0,0,0.08), 0 8px 16px rgba(0,0,0,0.04);
    --shadow-glow: 0 0 40px rgba(37,99,235,0.12);
    --shadow-glow-accent: 0 0 40px rgba(6,182,212,0.1);
    --radius: 16px;
    --radius-sm: 12px;
    --radius-xs: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
}

/* --- Reset --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font); color: var(--slate-600); line-height: 1.75; background: var(--white); overflow-x: hidden; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { color: var(--slate-900); line-height: 1.25; letter-spacing: -0.02em; }

/* --- Buttons --- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 14px 32px; border-radius: 50px; font-size: 0.95rem; font-weight: 600; cursor: pointer; border: 2px solid transparent; transition: var(--transition); font-family: var(--font); white-space: nowrap; letter-spacing: 0.01em; }
.btn-primary { background: var(--gradient-primary); color: var(--white); box-shadow: 0 4px 14px rgba(37,99,235,0.3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(37,99,235,0.4); }
.btn-outline { background: transparent; color: var(--white); border-color: rgba(255,255,255,0.3); backdrop-filter: blur(4px); }
.btn-outline:hover { background: var(--white); color: var(--primary); border-color: var(--white); }
.btn-outline-dark { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline-dark:hover { background: var(--primary); color: var(--white); box-shadow: 0 4px 14px rgba(37,99,235,0.3); }
.btn-full { width: 100%; }
.btn svg { width: 18px; height: 18px; }

/* --- Section Headers --- */
.section-header { text-align: center; margin-bottom: 56px; }
.section-title { font-size: 2.1rem; font-weight: 800; color: var(--slate-900); margin-bottom: 12px; }
.section-title span { background: var(--gradient-primary); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.section-line { width: 48px; height: 3px; background: var(--gradient-primary); margin: 0 auto 16px; border-radius: 2px; }
.section-desc { font-size: 1.05rem; color: var(--slate-500); max-width: 560px; margin: 0 auto; line-height: 1.75; }

/* --- Page Headers --- */
.page-header { position: relative; padding: 150px 0 80px; overflow: hidden; }
.page-header::before { content: ''; position: absolute; inset: 0; background: var(--gradient-hero); }
.page-header::after { content: ''; position: absolute; inset: 0; background: radial-gradient(ellipse at 30% 20%, rgba(37,99,235,0.12) 0%, transparent 50%), radial-gradient(ellipse at 70% 80%, rgba(6,182,212,0.08) 0%, transparent 50%); }
.page-header .grain { position: absolute; inset: 0; opacity: 0.03; background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E"); }
.page-header-content { position: relative; z-index: 1; text-align: center; }
.page-header h1 { font-size: 2.6rem; font-weight: 900; color: var(--white); margin-bottom: 14px; letter-spacing: -0.03em; }
.page-header p { font-size: 1.1rem; color: rgba(255,255,255,0.55); max-width: 520px; margin: 0 auto; font-weight: 400; }
.breadcrumb { display: flex; align-items: center; justify-content: center; gap: 8px; margin-top: 20px; font-size: 0.88rem; }
.breadcrumb a { color: rgba(255,255,255,0.4); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { color: rgba(255,255,255,0.2); }
.breadcrumb .current { color: var(--accent); font-weight: 500; }

/* --- Navigation --- */
.navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; padding: 20px 0; transition: var(--transition); }
.navbar.scrolled { background: rgba(255,255,255,0.92); backdrop-filter: saturate(180%) blur(20px); -webkit-backdrop-filter: saturate(180%) blur(20px); box-shadow: 0 1px 0 rgba(0,0,0,0.06); padding: 12px 0; }
.nav-container { display: flex; align-items: center; justify-content: space-between; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 1.2rem; font-weight: 800; color: var(--white); letter-spacing: -0.02em; }
.navbar.scrolled .logo { color: var(--slate-900); }
.logo svg { width: 36px; height: 36px; }
.nav-menu { display: flex; gap: 2px; align-items: center; background: rgba(255,255,255,0.06); border-radius: 12px; padding: 4px; }
.nav-menu a { color: rgba(255,255,255,0.7); font-size: 0.88rem; font-weight: 500; padding: 8px 16px; border-radius: 8px; transition: var(--transition); }
.nav-menu a:hover, .nav-menu a.active { color: var(--white); background: rgba(255,255,255,0.1); }
.navbar.scrolled .nav-menu { background: var(--slate-100); }
.navbar.scrolled .nav-menu a { color: var(--slate-600); }
.navbar.scrolled .nav-menu a:hover, .navbar.scrolled .nav-menu a.active { color: var(--primary); background: var(--white); box-shadow: var(--shadow-xs); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 22px; height: 2px; background: var(--white); transition: var(--transition); border-radius: 2px; }
.navbar.scrolled .nav-toggle span { background: var(--slate-700); }

/* --- Hero --- */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; background: var(--gradient-hero); z-index: 0; }
.hero-bg::before { content: ''; position: absolute; inset: 0; background: radial-gradient(ellipse at 20% 50%, rgba(37,99,235,0.15) 0%, transparent 60%), radial-gradient(ellipse at 80% 30%, rgba(6,182,212,0.1) 0%, transparent 50%), radial-gradient(ellipse at 50% 80%, rgba(139,92,246,0.06) 0%, transparent 50%); }
.hero-bg::after { content: ''; position: absolute; inset: 0; background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.02'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E"); }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(0,0,0,0.05) 0%, rgba(0,0,0,0.15) 100%); z-index: 1; }
.hero-content { position: relative; z-index: 2; text-align: center; max-width: 800px; padding: 120px 24px 100px; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,0.06); backdrop-filter: blur(12px); border: 1px solid rgba(255,255,255,0.1); border-radius: 50px; padding: 8px 20px; font-size: 0.82rem; color: var(--accent); margin-bottom: 28px; font-weight: 500; letter-spacing: 0.02em; }
.hero-badge svg { width: 14px; height: 14px; }
.hero-title { display: flex; flex-direction: column; gap: 12px; margin-bottom: 24px; }
.hero-title h1 { font-size: 3.4rem; font-weight: 900; color: var(--white); letter-spacing: -0.03em; line-height: 1.1; }
.hero-title h1 .accent { background: linear-gradient(135deg, #60a5fa 0%, #22d3ee 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-title h2 { font-size: 1.4rem; font-weight: 300; color: rgba(255,255,255,0.55); letter-spacing: 0.02em; }
.hero-desc { font-size: 1.1rem; color: rgba(255,255,255,0.6); margin-bottom: 40px; line-height: 1.8; max-width: 600px; margin-left: auto; margin-right: auto; }
.hero-btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero-scroll { position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%); z-index: 2; text-align: center; color: rgba(255,255,255,0.3); font-size: 0.75rem; letter-spacing: 0.1em; text-transform: uppercase; pointer-events: none; }
/* --- Hero Slider --- */
.hero-slider { position: absolute; inset: 0; z-index: 1; overflow: hidden; }
.hero-slide { position: absolute; inset: 0; opacity: 0; visibility: hidden; transition: opacity 0.8s ease, visibility 0.8s ease; }
.hero-slide.active { opacity: 1; visibility: visible; }
.hero-slide-bg { position: absolute; inset: 0; }
.hero-slide-overlay { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(0,0,0,0.05) 0%, rgba(0,0,0,0.15) 100%); }
.hero-slide .container { position: relative; z-index: 2; height: 100%; display: flex; align-items: center; justify-content: center; }
.hero-slide-content { max-width: 800px; padding: 120px 24px 100px; text-align: center; }
.hero-slide-content .hero-title { display: flex; flex-direction: column; gap: 12px; margin-bottom: 24px; }
.hero-slide-content .hero-title h1 { font-size: 3.4rem; font-weight: 900; color: var(--white); letter-spacing: -0.03em; line-height: 1.1; }
.hero-slide-content .hero-title h1 .accent { background: linear-gradient(135deg, #60a5fa 0%, #22d3ee 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-slide-content .hero-title h2 { font-size: 1.4rem; font-weight: 300; color: rgba(255,255,255,0.55); letter-spacing: 0.02em; }
.hero-slide-content .hero-desc { font-size: 1.1rem; color: rgba(255,255,255,0.6); margin-bottom: 40px; line-height: 1.8; max-width: 600px; margin-left: auto; margin-right: auto; }
.hero-slide-content .hero-btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero-slider-controls { position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%); z-index: 5; }
.hero-dots { display: flex; gap: 12px; align-items: center; }
.hero-dot { width: 10px; height: 10px; border-radius: 50%; background: rgba(255,255,255,0.3); border: none; cursor: pointer; transition: var(--transition); padding: 0; }
.hero-dot:hover { background: rgba(255,255,255,0.5); }
.hero-dot.active { background: var(--white); width: 28px; border-radius: 5px; }
.hero-badge-slide { display: inline-flex; align-items: center; gap: 6px; background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1); border-radius: 50px; padding: 6px 16px; font-size: 0.8rem; color: rgba(255,255,255,0.7); margin-bottom: 24px; font-weight: 500; letter-spacing: 0.02em; }
.scroll-arrow { width: 20px; height: 20px; border-right: 1.5px solid rgba(255,255,255,0.3); border-bottom: 1.5px solid rgba(255,255,255,0.3); transform: rotate(45deg); margin: 6px auto 0; animation: scrollBounce 2s infinite; }
@keyframes scrollBounce { 0%, 100% { transform: rotate(45deg) translateY(0); } 50% { transform: rotate(45deg) translateY(8px); } }

/* --- Stats Bar --- */
.stats-bar { background: var(--white); padding: 0; margin-top: -36px; position: relative; z-index: 3; }
.stats-container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); background: var(--white); border-radius: var(--radius); box-shadow: 0 1px 0 rgba(0,0,0,0.04), 0 10px 40px rgba(0,0,0,0.06); overflow: hidden; border: 1px solid var(--slate-100); }
.stat-item { text-align: center; padding: 36px 16px; position: relative; transition: var(--transition); }
.stat-item:hover { background: var(--slate-50); }
.stat-item:not(:last-child)::after { content: ''; position: absolute; right: 0; top: 20%; height: 60%; width: 1px; background: var(--slate-200); }
.stat-number { font-size: 2.4rem; font-weight: 900; background: var(--gradient-primary); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; letter-spacing: -0.03em; }
.stat-unit { font-size: 1.05rem; color: var(--accent); font-weight: 700; }
.stat-label { font-size: 0.88rem; color: var(--slate-500); margin-top: 6px; font-weight: 500; }

/* --- Cards --- */
.card { background: var(--white); border: 1px solid var(--slate-200); border-radius: var(--radius); padding: 36px 28px; transition: var(--transition); position: relative; overflow: hidden; }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-xl); border-color: transparent; }
.card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px; background: var(--gradient-primary); opacity: 0; transition: var(--transition); }
.card:hover::before { opacity: 1; }
.card-icon { width: 52px; height: 52px; border-radius: 14px; display: flex; align-items: center; justify-content: center; margin-bottom: 20px; background: var(--slate-100); }
.card-icon svg { width: 26px; height: 26px; }
.card-icon.blue { background: var(--primary-50); color: var(--primary); }
.card-icon.cyan { background: var(--accent-light); color: var(--accent); }
.card-icon.orange { background: var(--warm-light); color: var(--warm); }
.card-icon.green { background: var(--success-light); color: var(--success); }
.card-icon.purple { background: var(--violet-light); color: var(--violet); }
.card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 10px; letter-spacing: -0.01em; }
.card p { font-size: 0.92rem; color: var(--slate-500); line-height: 1.7; }

/* --- Feature List --- */
.feature-list { display: flex; flex-direction: column; gap: 14px; }
.feature-item { display: flex; gap: 14px; align-items: flex-start; }
.feature-check { width: 22px; height: 22px; border-radius: 6px; background: var(--primary-50); color: var(--primary); display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 2px; font-size: 0.7rem; font-weight: 800; }
.feature-item h4 { font-size: 0.92rem; font-weight: 600; color: var(--slate-800); margin-bottom: 2px; }
.feature-item p { font-size: 0.85rem; color: var(--slate-500); line-height: 1.55; }

/* --- Timeline --- */
.timeline { position: relative; padding-left: 40px; }
.timeline::before { content: ''; position: absolute; left: 14px; top: 4px; bottom: 4px; width: 2px; background: linear-gradient(180deg, var(--primary), var(--accent)); border-radius: 1px; opacity: 0.3; }
.timeline-item { position: relative; padding-bottom: 36px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-dot { position: absolute; left: -33px; top: 2px; width: 26px; height: 26px; border-radius: 50%; background: var(--white); border: 2.5px solid var(--primary); display: flex; align-items: center; justify-content: center; font-size: 0.65rem; font-weight: 800; color: var(--primary); box-shadow: 0 0 0 4px var(--primary-50); }
.timeline-item h4 { font-size: 0.98rem; font-weight: 700; color: var(--slate-800); margin-bottom: 6px; }
.timeline-item p { font-size: 0.88rem; color: var(--slate-500); line-height: 1.65; }

/* --- Tabs --- */
.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 40px; background: var(--slate-100); padding: 6px; border-radius: 14px; width: fit-content; }
.tab-btn { padding: 10px 22px; border: none; background: transparent; border-radius: 10px; font-size: 0.9rem; font-weight: 600; color: var(--slate-500); cursor: pointer; transition: var(--transition); font-family: var(--font); display: inline-flex; align-items: center; gap: 8px; }
.tab-btn:hover { color: var(--slate-700); }
.tab-btn.active { background: var(--white); color: var(--primary); box-shadow: var(--shadow-sm); }
.tab-btn svg { width: 18px; height: 18px; pointer-events: none; }
.tab-pane { display: none; animation: fadeInUp 0.4s ease; }
.tab-pane.active { display: block; }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }

/* --- Form --- */
.form-wrap { background: var(--white); border: 1px solid var(--slate-200); padding: 40px; border-radius: var(--radius); box-shadow: var(--shadow-md); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 0.86rem; font-weight: 600; color: var(--slate-700); margin-bottom: 8px; letter-spacing: 0.01em; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 13px 16px; border: 1.5px solid var(--slate-200); border-radius: var(--radius-xs); font-size: 0.93rem; font-family: var(--font); transition: var(--transition); background: var(--white); color: var(--slate-900); }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,0.1); }
.form-group textarea { resize: vertical; min-height: 100px; }

/* --- Badge/Tag --- */
.tag { display: inline-flex; align-items: center; gap: 6px; padding: 5px 14px; border-radius: 50px; font-size: 0.8rem; font-weight: 600; letter-spacing: 0.02em; }
.tag.blue { background: var(--primary-50); color: var(--primary); }
.tag.cyan { background: var(--accent-light); color: var(--accent-dark); }
.tag.green { background: var(--success-light); color: var(--success); }
.tag.orange { background: var(--warm-light); color: #d97706; }
.tag.purple { background: var(--violet-light); color: var(--violet); }

/* --- Footer --- */
.footer { background: var(--slate-950); color: var(--slate-400); padding: 64px 0 0; }
.footer::before { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, transparent, rgba(37,99,235,0.03)); }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 48px; padding-bottom: 48px; position: relative; }
.footer-brand .logo { color: var(--white); margin-bottom: 14px; }
.footer-brand p { font-size: 0.88rem; margin-bottom: 4px; }
.footer-desc { font-size: 0.85rem; line-height: 1.6; margin-top: 10px; color: var(--slate-500); }
.footer-links h4 { color: var(--white); font-size: 0.9rem; margin-bottom: 18px; font-weight: 700; letter-spacing: 0.02em; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { font-size: 0.88rem; color: var(--slate-400); }
.footer-links a:hover { color: var(--accent); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); padding: 28px 0; text-align: center; font-size: 0.82rem; color: var(--slate-500); }
.footer-bottom p { margin-bottom: 4px; }

/* --- Animations --- */
.fade-in { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* --- Responsive --- */
@media (max-width: 1024px) {
    .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 36px; }
}
@media (max-width: 768px) {
    .nav-toggle { display: flex; }
    .nav-menu { position: fixed; top: 0; right: -100%; width: 280px; height: 100vh; background: var(--white); flex-direction: column; padding: 80px 24px 24px; gap: 4px; transition: var(--transition); box-shadow: var(--shadow-xl); }
    .nav-menu.open { right: 0; }
    .nav-menu a { color: var(--slate-700) !important; font-size: 1rem; padding: 12px 16px; }
    .nav-menu a:hover, .nav-menu a.active { color: var(--primary) !important; background: var(--primary-50) !important; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .stat-item:not(:last-child)::after { display: none; }
    .form-row { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .hero-title h1 { font-size: 2.4rem; }
    .hero-title h2 { font-size: 1.1rem; }
    .page-header h1 { font-size: 2rem; }
    .page-header { padding: 120px 0 60px; }
    .section-title { font-size: 1.7rem; }
    .tabs { width: 100%; }
}
@media (max-width: 480px) {
    .hero-title h1 { font-size: 1.9rem; }
    .hero-btns { flex-direction: column; }
    .btn { padding: 12px 24px; font-size: 0.9rem; }
    .stats-grid { grid-template-columns: 1fr; }
    .stat-item { padding: 24px 16px; }
    .form-wrap { padding: 24px; }
}