/* ============================================================
   common.css — 哇嘿官网全站共享样式
   包含：变量、重置、导航、页脚、联系弹窗、通用组件
   ============================================================ */

/* ====== CSS Variables ====== */
:root {
    --bg-white: #ffffff;
    --bg-light: #fafbfc;
    --bg-section: #f8f9fa;
    --neon-orange: #ff6b35;
    --neon-pink: #ff2e63;
    --neon-purple: #8b5cf6;
    --neon-blue: #3b82f6;
    --neon-cyan: #06b6d4;
    --neon-green: #10b981;
    --gradient-neon: linear-gradient(135deg, #ff6b35 0%, #ff2e63 50%, #8b5cf6 100%);
    --gradient-hero: linear-gradient(180deg, #ffffff 0%, #f8f9fa 100%);
    --text-dark: #1a1a2e;
    --text-gray: #4a5568;
    --text-light: #718096;
    --text-muted: #a0aec0;
    --border: rgba(0,0,0,0.06);
    --border-mid: rgba(0,0,0,0.1);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.08);
    --shadow-neon: 0 4px 30px rgba(255,107,53,0.2);
    --transition: all 0.4s cubic-bezier(0.16,1,0.3,1);
}

/* ====== Reset ====== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif; color: var(--text-dark); line-height: 1.7; overflow-x: hidden; background: var(--bg-white); }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; height: auto; }

/* ====== Container ====== */
.container { max-width: 1280px; margin: 0 auto; padding: 0 2rem; }

/* ====== Navigation Bar ====== */
.navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(255,255,255,0.95); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-bottom: 1px solid var(--border); }
.nav-container { max-width: 1280px; margin: 0 auto; padding: 0 2rem; display: flex; align-items: center; justify-content: space-between; height: 80px; }
.logo { display: flex; align-items: center; gap: 12px; }
.logo-icon { width: 48px; height: 48px; background: var(--gradient-neon); border-radius: 14px; display: flex; align-items: center; justify-content: center; color: white; font-size: 20px; font-weight: 800; box-shadow: var(--shadow-neon); flex-shrink: 0; }
.logo-text { font-size: 1.4rem; font-weight: 700; }
.logo-text span { background: var(--gradient-neon); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.nav-links { display: flex; align-items: center; gap: 2.5rem; list-style: none; }
.nav-links a { font-weight: 500; font-size: 0.95rem; transition: var(--transition); padding: 8px 16px; border-radius: 8px; }
.nav-links a:hover { color: var(--neon-orange); background: rgba(255,107,53,0.05); }
.nav-item { position: relative; }

/* Dropdown */
.dropdown { position: absolute; top: 100%; left: 50%; transform: translateX(-50%) translateY(10px); min-width: 220px; background: rgba(255,255,255,0.98); backdrop-filter: blur(20px); border-radius: 16px; box-shadow: var(--shadow-lg); border: 1px solid var(--border); padding: 12px; opacity: 0; visibility: hidden; transition: all 0.3s; z-index: 100; }
.nav-item:hover .dropdown { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.dropdown a { display: flex; align-items: center; gap: 10px; padding: 12px 16px; border-radius: 10px; color: var(--text-gray) !important; font-size: 0.9rem; white-space: nowrap; }
.dropdown a:hover { background: rgba(255,107,53,0.08) !important; color: var(--neon-orange) !important; }
.dropdown-icon { font-size: 1.2rem; }

/* CTA Nav Button */
.nav-cta { background: var(--gradient-neon) !important; color: white !important; padding: 12px 28px !important; border-radius: 50px !important; font-weight: 600 !important; box-shadow: var(--shadow-neon); }
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(255,107,53,0.35); }
.nav-item.no-link > a { cursor: pointer !important; }

/* ====== Mobile Menu ====== */
.mobile-menu-btn { display: none; flex-direction: column; gap: 6px; cursor: pointer; padding: 12px; z-index: 1001; background: var(--bg-white); border-radius: 12px; border: 1px solid var(--border-mid); }
.mobile-menu-btn span { width: 24px; height: 2px; background: var(--text-dark); border-radius: 2px; transition: var(--transition); }
.mobile-menu-btn.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 6px); }
.mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
.mobile-menu-btn.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -6px); }

.mobile-nav { display: none; position: fixed; top: 80px; left: 1rem; right: 1rem; background: rgba(255,255,255,0.98); backdrop-filter: blur(20px); padding: 1.5rem; border-radius: 20px; border: 1px solid rgba(0,0,0,0.05); box-shadow: var(--shadow-lg); z-index: 999; opacity: 0; transform: translateY(-20px); transition: var(--transition); }
.mobile-nav.active { display: block; opacity: 1; transform: translateY(0); }
.mobile-nav-links { list-style: none; }
.mobile-nav-links li { margin-bottom: 0.25rem; }
.mobile-nav-links a { display: block; color: var(--text-gray); text-decoration: none; font-size: 1rem; font-weight: 500; padding: 1rem; border-radius: 12px; transition: var(--transition); }
.mobile-nav-links a:hover { background: rgba(255,107,53,0.05); color: var(--neon-orange); }
.mobile-nav .has-submenu { position: relative; }
.mobile-nav .submenu-toggle { display: flex; align-items: center; justify-content: space-between; width: 100%; padding: 14px 16px; color: var(--text-gray); font-weight: 500; font-size: 0.95rem; background: none; border: none; cursor: pointer; border-radius: 10px; transition: all 0.3s; text-align: left; font-family: inherit; }
.mobile-nav .submenu-toggle:hover { background: rgba(255,107,53,0.05); color: var(--neon-orange); }
.mobile-nav .submenu-toggle::after { content: '\203A'; font-size: 1.2rem; transition: transform 0.3s; }
.mobile-nav .submenu-toggle.active::after { transform: rotate(90deg); }
.mobile-nav .submenu { display: none; list-style: none; padding-left: 1rem; margin: 0; background: rgba(0,0,0,0.02); border-radius: 12px; margin-top: 4px; overflow: hidden; }
.mobile-nav .submenu.active { display: block; }
.mobile-nav .submenu a { display: block; padding: 12px 24px; color: var(--text-light); font-size: 0.9rem; text-decoration: none; border-radius: 8px; transition: all 0.3s; }
.mobile-nav .submenu a:hover { background: rgba(255,107,53,0.08); color: var(--neon-orange); }

/* ====== Page Hero (base) ====== */
.page-hero { padding: 160px 0 100px; background: var(--gradient-hero); position: relative; overflow: hidden; text-align: center; }
.hero-emoji-bg { position: absolute; font-size: 15rem; opacity: 0.05; top: 50%; left: 50%; transform: translate(-50%,-50%); pointer-events: none; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(139,92,246,0.1); color: var(--neon-purple); padding: 8px 20px; border-radius: 50px; font-size: 0.9rem; font-weight: 600; margin-bottom: 24px; }
.hero-title { font-size: 3.5rem; font-weight: 800; line-height: 1.2; margin-bottom: 24px; background: var(--gradient-neon); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-desc { font-size: 1.15rem; color: var(--text-gray); max-width: 720px; margin: 0 auto 40px; line-height: 1.9; }
.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ====== Buttons ====== */
.btn-primary { background: var(--gradient-neon); color: white; padding: 16px 36px; border-radius: 50px; font-weight: 600; font-size: 1rem; box-shadow: var(--shadow-neon); transition: var(--transition); display: inline-flex; align-items: center; gap: 8px; border: none; cursor: pointer; }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(255,107,53,0.35); }
.btn-secondary { background: white; color: var(--text-dark); padding: 16px 36px; border-radius: 50px; font-weight: 600; font-size: 1rem; border: 2px solid var(--border-mid); transition: var(--transition); display: inline-flex; align-items: center; gap: 8px; }
.btn-secondary:hover { border-color: var(--neon-orange); color: var(--neon-orange); transform: translateY(-3px); }
.btn-outline-light { background: transparent; color: white; padding: 16px 36px; border-radius: 50px; font-weight: 600; font-size: 1rem; border: 2px solid rgba(255,255,255,0.5); transition: var(--transition); display: inline-flex; align-items: center; gap: 8px; }
.btn-outline-light:hover { background: rgba(255,255,255,0.15); border-color: white; transform: translateY(-3px); }

/* ====== Section Common ====== */
.section { padding: 100px 0; }
.section-alt { background: var(--bg-section); }
.section-inner { max-width: 1280px; margin: 0 auto; padding: 0 2rem; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(139,92,246,0.1); color: var(--neon-purple); padding: 8px 20px; border-radius: 50px; font-size: 0.9rem; font-weight: 600; margin-bottom: 16px; }
.section-title { font-size: 2.5rem; font-weight: 700; margin-bottom: 20px; }
.section-desc { font-size: 1.1rem; color: var(--text-gray); max-width: 640px; margin: 0 auto; }
.section-tag { display: inline-flex; align-items: center; gap: 6px; padding: 6px 16px; border-radius: 50px; font-size: 0.85rem; font-weight: 600; }
.divider { width: 60px; height: 4px; background: var(--gradient-neon); border-radius: 2px; margin-top: 20px; }
.divider.center { margin-left: auto; margin-right: auto; }

/* ====== Feature Grid ====== */
.features { padding: 100px 0; }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 30px; }
.feature-card { background: white; border-radius: 24px; padding: 40px 30px; box-shadow: var(--shadow-md); border: 1px solid rgba(0,0,0,0.04); transition: var(--transition); position: relative; overflow: hidden; }
.feature-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.feature-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: var(--gradient-neon); opacity: 0; transition: var(--transition); }
.feature-card:hover::before { opacity: 1; }
.feature-icon { width: 64px; height: 64px; border-radius: 16px; display: flex; align-items: center; justify-content: center; font-size: 2rem; margin-bottom: 24px; }
.feature-icon.purple { background: rgba(139,92,246,0.1); }
.feature-icon.orange { background: rgba(255,107,53,0.1); }
.feature-icon.pink { background: rgba(255,46,99,0.1); }
.feature-icon.green { background: rgba(16,185,129,0.1); }
.feature-icon.blue { background: rgba(59,130,246,0.1); }
.feature-icon.cyan { background: rgba(6,182,212,0.1); }
.feature-title { font-size: 1.25rem; font-weight: 700; margin-bottom: 12px; }
.feature-desc { color: var(--text-gray); font-size: 0.95rem; line-height: 1.8; }

/* ====== Sub Cards ====== */
.sub-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 30px; }
.sub-card { background: white; border-radius: 20px; padding: 36px 30px; box-shadow: var(--shadow-sm); border: 1px solid rgba(0,0,0,0.04); transition: var(--transition); }
.sub-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.sub-card .sub-icon { font-size: 2.5rem; margin-bottom: 16px; }
.sub-card h4 { font-size: 1.15rem; font-weight: 700; margin-bottom: 12px; }
.sub-card p { color: var(--text-gray); font-size: 0.93rem; line-height: 1.8; }

/* ====== Demo Section ====== */
.demo-section { padding: 100px 0; }
.demo-card { background: white; border-radius: 32px; padding: 60px; box-shadow: var(--shadow-lg); display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; border: 1px solid rgba(0,0,0,0.04); }
.demo-visual { background: linear-gradient(135deg, rgba(139,92,246,0.1), rgba(255,46,99,0.1)); border-radius: 24px; min-height: 360px; display: flex; align-items: center; justify-content: center; font-size: 6rem; }
.demo-content h3 { font-size: 1.75rem; font-weight: 700; margin-bottom: 20px; }
.demo-content p { color: var(--text-gray); margin-bottom: 16px; font-size: 1rem; line-height: 1.9; }
.demo-content .demo-list { list-style: none; margin: 20px 0 30px; }
.demo-content .demo-list li { padding: 8px 0 8px 28px; position: relative; color: var(--text-gray); font-size: 0.95rem; }
.demo-content .demo-list li::before { content: '\2713'; position: absolute; left: 0; color: var(--neon-green); font-weight: 700; }

/* ====== Tech Section ====== */
.tech-section { padding: 100px 0; background: var(--bg-section); }
.tech-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 20px; }
.tech-item { display: flex; align-items: flex-start; gap: 16px; padding: 24px; background: white; border-radius: 16px; box-shadow: var(--shadow-sm); border: 1px solid rgba(0,0,0,0.04); transition: var(--transition); }
.tech-item:hover { box-shadow: var(--shadow-md); transform: translateX(4px); }
.tech-icon { width: 48px; height: 48px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 1.5rem; flex-shrink: 0; background: rgba(16,185,129,0.1); }
.tech-text h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 4px; }
.tech-text p { color: var(--text-gray); font-size: 0.9rem; line-height: 1.7; }

/* ====== Flow Section ====== */
.flow-section { padding: 100px 0; }
.flow-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 30px; }
.flow-item { text-align: center; padding: 40px 20px; background: white; border-radius: 20px; box-shadow: var(--shadow-md); border: 1px solid rgba(0,0,0,0.04); transition: var(--transition); position: relative; }
.flow-item:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.flow-num { width: 56px; height: 56px; border-radius: 50%; background: var(--gradient-neon); color: white; font-size: 1.5rem; font-weight: 800; display: flex; align-items: center; justify-content: center; margin: 0 auto 20px; }
.flow-title { font-size: 1.2rem; font-weight: 700; margin-bottom: 10px; }
.flow-desc { color: var(--text-gray); font-size: 0.93rem; line-height: 1.7; }

/* ====== Stats Section ====== */
.stats-section { padding: 80px 0; background: var(--gradient-neon); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; text-align: center; color: white; }
.stat-item h3 { font-size: 3.5rem; font-weight: 800; margin-bottom: 8px; }
.stat-item p { font-size: 1.1rem; opacity: 0.9; }

/* ====== CTA Section ====== */
.cta-section { padding: 100px 0; background: var(--gradient-neon); text-align: center; }
.cta-inner { max-width: 640px; margin: 0 auto; padding: 0 2rem; }
.cta-title { font-size: 2.5rem; font-weight: 700; color: white; margin-bottom: 20px; }
.cta-desc { color: rgba(255,255,255,0.9); font-size: 1.2rem; margin-bottom: 40px; max-width: 600px; margin-left: auto; margin-right: auto; }
.cta-btn { background: white; color: var(--neon-orange); padding: 18px 48px; border-radius: 50px; font-weight: 700; font-size: 1.1rem; display: inline-flex; align-items: center; gap: 10px; transition: var(--transition); }
.cta-btn:hover { transform: translateY(-3px) scale(1.05); box-shadow: 0 20px 50px rgba(0,0,0,0.2); }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.cta-btn-white { background: white; color: var(--neon-orange); padding: 16px 36px; border-radius: 50px; font-weight: 600; font-size: 1rem; display: inline-flex; align-items: center; gap: 8px; transition: var(--transition); }
.cta-btn-white:hover { transform: translateY(-3px); box-shadow: 0 10px 30px rgba(0,0,0,0.2); }
.cta-btn-outline { background: transparent; color: white; padding: 16px 36px; border-radius: 50px; font-weight: 600; font-size: 1rem; border: 2px solid rgba(255,255,255,0.5); transition: var(--transition); display: inline-flex; align-items: center; gap: 8px; }
.cta-btn-outline:hover { background: rgba(255,255,255,0.15); border-color: white; transform: translateY(-3px); }

/* ====== Footer ====== */
.footer { background: var(--text-dark); color: white; padding: 60px 0 30px; }
.footer-content { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 60px; margin-bottom: 40px; }
.footer-brand .logo-text { color: white; font-size: 1.5rem; }
.footer-brand .logo-text span { background: var(--gradient-neon); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.footer-brand p { color: rgba(255,255,255,0.7); margin-top: 16px; }
.footer-title { font-weight: 700; margin-bottom: 20px; font-size: 1.1rem; }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 12px; }
.footer-links a { color: rgba(255,255,255,0.7); transition: var(--transition); }
.footer-links a:hover { color: var(--neon-orange); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 30px; text-align: center; color: rgba(255,255,255,0.5); font-size: 0.9rem; }
.footer-bottom a { color: rgba(255,255,255,0.5); transition: var(--transition); }
.footer-bottom a:hover { color: var(--neon-orange); }

/* ====== Contact Float Button ====== */
.contact-float-btn { position: fixed; right: 30px; top: 50%; transform: translateY(-50%); z-index: 999; }
.contact-float-btn .float-btn-main { background: linear-gradient(135deg, #ff6b35, #ff2e63); color: #fff; padding: 16px 24px; border-radius: 50px; font-weight: 600; font-size: 1rem; border: none; cursor: pointer; box-shadow: 0 8px 30px rgba(255,107,53,0.4); display: flex; align-items: center; gap: 8px; transition: all 0.3s; animation: floatPulse 2s ease-in-out infinite; }
.contact-float-btn .float-btn-main:hover { transform: scale(1.05); box-shadow: 0 12px 40px rgba(255,107,53,0.5); }
@keyframes floatPulse { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-5px); } }

/* ====== Contact Modal ====== */
.contact-modal-overlay { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.6); backdrop-filter: blur(5px); z-index: 1001; opacity: 0; visibility: hidden; transition: all 0.3s; display: flex; align-items: center; justify-content: center; }
.contact-modal-overlay.active { opacity: 1; visibility: visible; }
.contact-modal { background: white; border-radius: 24px; padding: 40px; width: 90%; max-width: 480px; transform: translateY(20px); transition: all 0.3s; position: relative; }
.contact-modal-overlay.active .contact-modal { transform: translateY(0); }
.contact-modal h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 8px; background: var(--gradient-neon); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.contact-modal .form-subtitle { color: var(--text-gray); margin-bottom: 24px; font-size: 0.95rem; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 500; font-size: 0.9rem; }
.form-group label span { color: #ff2e63; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 14px 16px; border: 2px solid var(--border-mid); border-radius: 12px; font-size: 1rem; transition: all 0.3s; font-family: inherit; background: var(--bg-white); }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--neon-orange); box-shadow: 0 0 0 4px rgba(255,107,53,0.1); }
.form-group textarea { resize: vertical; min-height: 80px; }
.form-submit { width: 100%; padding: 16px; background: var(--gradient-neon); color: white; border: none; border-radius: 12px; font-size: 1rem; font-weight: 600; cursor: pointer; transition: all 0.3s; margin-top: 8px; }
.form-submit:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(255,107,53,0.4); }
.form-submit:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }
.modal-close { position: absolute; top: 20px; right: 20px; width: 36px; height: 36px; border: none; background: rgba(0,0,0,0.05); border-radius: 50%; cursor: pointer; font-size: 1.2rem; display: flex; align-items: center; justify-content: center; transition: all 0.3s; }
.modal-close:hover { background: rgba(255,107,53,0.1); color: var(--neon-orange); }
.form-success { display: none; text-align: center; padding: 40px; }
.form-success.show { display: block; }
.form-success-icon { font-size: 4rem; margin-bottom: 16px; }
.form-success h4 { font-size: 1.5rem; margin-bottom: 8px; color: var(--neon-green); }
.form-success p { color: var(--text-gray); }

/* ====== Responsive ====== */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .mobile-menu-btn { display: flex; }
    .mobile-nav { display: block; }
    .hero-title { font-size: 2.2rem; }
    .hero-desc { font-size: 1rem; }
    .section-title { font-size: 1.8rem; }
    .demo-card { grid-template-columns: 1fr; padding: 30px; }
    .demo-visual { min-height: 240px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-content { grid-template-columns: 1fr 1fr; }
    .features-grid, .sub-grid, .tech-list { grid-template-columns: 1fr; }
    .flow-grid { grid-template-columns: 1fr 1fr; }
    .page-hero { padding: 130px 0 70px; }
}