/* 文件路径: /assets/css/style.css */
@import url('https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css');

/* ================= 全局变量 (默认浅色模式) ================= */
:root {
    --bg-base: #f5f5f7;
    --bg-surface: #ffffff;
    --text-primary: #1d1d1f;
    --text-secondary: #86868b;
    --accent-color: #0066cc; 
    --success-color: #34a853;
    
    /* 浅色毛玻璃参数 */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.08);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
    
    /* 聊天小窗变量 */
    --chat-bg: #ffffff;
    --chat-header: #f5f5f7;
    --chat-border: #e5e5ea;
    --chat-bubble-agent: #f0f0f0;
    --chat-input-bg: #f5f5f7;
    
    --radius-lg: 24px;
    --radius-md: 16px;
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ================= 深色模式变量 ================= */
[data-theme="dark"] {
    --bg-base: #000000;
    --bg-surface: #111113;
    --text-primary: #f5f5f7;
    --text-secondary: #a1a1a6;
    --accent-color: #2997ff;
    
    /* 深色毛玻璃参数 */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    
    /* 聊天小窗变量 */
    --chat-bg: #151518;
    --chat-header: #1c1c20;
    --chat-border: #333333;
    --chat-bubble-agent: #222226;
    --chat-input-bg: #111113;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif; -webkit-font-smoothing: antialiased; -webkit-tap-highlight-color: transparent; outline: none; }

body { background-color: var(--bg-base); color: var(--text-primary); overflow-x: hidden; line-height: 1.5; transition: background-color 0.4s ease, color 0.4s ease; }

/* 浅色模式光晕 */
.ambient-glow { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: -1; background: radial-gradient(circle at 15% 20%, rgba(0, 102, 204, 0.05) 0%, transparent 40%), radial-gradient(circle at 85% 80%, rgba(52, 168, 83, 0.03) 0%, transparent 40%); }
[data-theme="dark"] .ambient-glow { background: radial-gradient(circle at 15% 20%, rgba(41, 151, 255, 0.08) 0%, transparent 40%), radial-gradient(circle at 85% 80%, rgba(212, 175, 55, 0.05) 0%, transparent 40%); }

/* ---------------- 导航栏 ---------------- */
.navbar { position: fixed; top: 20px; left: 50%; transform: translateX(-50%); width: calc(100% - 40px); max-width: 1200px; height: 68px; border-radius: 34px; display: flex; justify-content: space-between; align-items: center; padding: 0 20px 0 24px; z-index: 1000; background: var(--glass-bg); backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px); border: 1px solid var(--glass-border); box-shadow: var(--glass-shadow); transition: all 0.4s ease; }

/* 彩虹边框修复 */
.logo-wrapper { position: relative; display: inline-flex; border-radius: 100px; padding: 2px; overflow: hidden; text-decoration: none; transform: translateZ(0); }
.logo-wrapper::before { content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%; background: conic-gradient(from 0deg, #4285f4 0%, #ea4335 25%, #fbbc05 50%, #34a853 75%, #4285f4 100%); animation: spin-border 4s linear infinite; z-index: 0; transform-origin: center; }
.logo-inner { position: relative; background: var(--bg-surface); padding: 8px 18px; border-radius: 100px; display: flex; align-items: center; gap: 8px; z-index: 1; color: var(--text-primary); font-weight: 600; font-size: 16px; letter-spacing: 1px; transition: background 0.4s ease, color 0.4s ease; }
.logo-img { width: 20px; height: 20px; object-fit: contain; display: block; }

@keyframes spin-border { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

.nav-center { display: flex; gap: 24px; align-items: center; }
.nav-center a { text-decoration: none; color: var(--text-primary); font-size: 14px; font-weight: 500; opacity: 0.8; transition: opacity 0.3s ease, color 0.3s ease; }
.nav-center a:hover, .nav-center a.active { opacity: 1; color: var(--accent-color); }

/* 导航栏右侧控制区 (主题与语言) */
.nav-controls { display: flex; align-items: center; gap: 16px; }
.control-btn { cursor: pointer; color: var(--text-primary); font-size: 18px; opacity: 0.8; transition: opacity 0.2s, color 0.2s; display: flex; align-items: center; justify-content: center; width: 32px; height: 32px; border-radius: 50%; background: rgba(128,128,128,0.1); }
.control-btn:hover { opacity: 1; color: var(--accent-color); background: rgba(128,128,128,0.2); }
.lang-text { font-size: 13px; font-weight: bold; }

.menu-toggle { display: none; font-size: 20px; color: var(--text-primary); cursor: pointer; padding: 10px; }

/* 滚动动画 */
.reveal { opacity: 0; transform: translateY(40px); transition: all 1s var(--ease-out-expo); }
.reveal.active { opacity: 1; transform: translateY(0); }
.delay-1 { transition-delay: 0.1s; } .delay-2 { transition-delay: 0.2s; } .delay-3 { transition-delay: 0.3s; }

/* 英雄首屏 */
.hero { min-height: 100vh; display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; padding: 120px 20px 60px; position: relative; }
.hero-badge { display: inline-block; padding: 8px 20px; border-radius: 30px; font-size: 13px; font-weight: 500; color: var(--accent-color); border: 1px solid var(--accent-color); background: rgba(0, 102, 204, 0.05); margin-bottom: 30px; letter-spacing: 2px; transition: all 0.4s ease; }
[data-theme="dark"] .hero-badge { color: var(--text-primary); border-color: var(--glass-border); background: rgba(255,255,255,0.03); }

.hero h1 { font-size: clamp(40px, 6vw, 72px); font-weight: 700; letter-spacing: -0.02em; line-height: 1.1; margin-bottom: 24px; color: var(--text-primary); }
[data-theme="dark"] .hero h1 { background: linear-gradient(180deg, #fff 0%, #a1a1a6 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }

.hero p { font-size: clamp(16px, 2vw, 22px); color: var(--text-secondary); max-width: 700px; margin: 0 auto 50px; }

/* 按钮组 */
.btn-group { display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; width: 100%; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; padding: 16px 36px; border-radius: 30px; font-size: 16px; font-weight: 500; text-decoration: none; cursor: pointer; border: none; transition: transform 0.2s var(--ease-out-expo), background 0.3s ease, box-shadow 0.3s ease, color 0.3s ease; }
.btn:active { transform: scale(0.94); }
.btn-primary { background: var(--text-primary); color: var(--bg-base); box-shadow: 0 10px 20px rgba(0,0,0,0.1); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 15px 25px rgba(0,0,0,0.15); color: var(--bg-base); }
[data-theme="dark"] .btn-primary { box-shadow: 0 0 20px rgba(255,255,255,0.1); }
.btn-secondary { background: var(--glass-bg); color: var(--text-primary); border: 1px solid var(--glass-border); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); }
.btn-secondary:hover { background: rgba(128,128,128,0.1); }

/* 通用区块设置 */
.section { padding: 90px 20px; max-width: 1240px; margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-header h2 { font-size: clamp(28px, 4vw, 40px); margin-bottom: 16px; font-weight: 600; }
.section-header p { color: var(--text-secondary); font-size: 18px; }

/* 毛玻璃面板公用类 */
.glass-panel { background: var(--bg-surface); border: 1px solid var(--glass-border); border-radius: var(--radius-lg); box-shadow: 0 4px 20px rgba(0,0,0,0.03); transition: all 0.4s ease; }
[data-theme="dark"] .glass-panel { background: rgba(255,255,255,0.03); backdrop-filter: blur(30px); -webkit-backdrop-filter: blur(30px); box-shadow: none; }

.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; }

/* 模块样式 */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.about-content h3 { font-size: 28px; margin-bottom: 20px; color: var(--text-primary); }
.about-content p { color: var(--text-secondary); margin-bottom: 20px; font-size: 16px; line-height: 1.8; }
.about-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 30px; }
.stat-item { padding: 24px; }
.stat-num { font-size: 36px; font-weight: 700; color: var(--accent-color); margin-bottom: 8px; }
.stat-label { font-size: 14px; color: var(--text-secondary); }

.adv-card { padding: 40px 30px; text-align: center; transition: transform 0.4s ease; }
.adv-card:hover { transform: translateY(-8px); box-shadow: 0 10px 30px rgba(0,0,0,0.08); }
[data-theme="dark"] .adv-card:hover { background: rgba(255,255,255,0.06); box-shadow: none; }
.adv-icon { font-size: 40px; color: var(--accent-color); margin-bottom: 20px; }
.adv-card h4 { font-size: 20px; margin-bottom: 12px; }
.adv-card p { font-size: 14px; color: var(--text-secondary); }

/* 表单样式适配 */
.form-group { margin-bottom: 24px; text-align: left; }
.form-group label { display: block; margin-bottom: 10px; font-weight: 500; color: var(--text-primary); font-size: 15px; }
.form-control { width: 100%; padding: 14px 18px; background: var(--chat-input-bg); border: 1px solid var(--chat-border); border-radius: var(--radius-md); color: var(--text-primary); transition: border-color 0.3s ease, box-shadow 0.3s ease; font-size: 15px; }
.form-control:focus { border-color: var(--accent-color); box-shadow: 0 0 0 3px rgba(0,102,204,0.1); outline: none; }
.btn-block { width: 100%; display: block; }
.required { color: #e53e3e; }
.form-message { margin-top: 15px; text-align: center; font-size: 14px; display: none; padding: 10px; border-radius: var(--radius-md); }
.msg-success { background: rgba(52,168,83,0.1); color: var(--success-color); }
.msg-error { background: rgba(229,62,62,0.1); color: #e53e3e; }

/* 弹窗样式 */
.modal { display: none; position: fixed; z-index: 2000; left: 0; top: 0; width: 100%; height: 100%; background-color: rgba(0,0,0,0.6); backdrop-filter: blur(4px); }
.modal-content { background-color: var(--bg-surface); margin: 5% auto; padding: 30px; border-radius: var(--radius-lg); width: 90%; max-width: 600px; position: relative; animation: fadeIn 0.4s ease; border: 1px solid var(--glass-border); color: var(--text-primary); }
.close-btn { position: absolute; right: 20px; top: 15px; font-size: 28px; font-weight: bold; color: var(--text-secondary); cursor: pointer; transition: color 0.3s; }
.close-btn:hover { color: var(--text-primary); }
.cert-info { font-weight: bold; margin-bottom: 10px; color: var(--text-primary); }
.cert-image-container { margin-top: 20px; text-align: center; border: 1px solid var(--glass-border); padding: 10px; border-radius: var(--radius-md); background: var(--bg-base); }
.cert-image-container img { max-width: 100%; height: auto; border-radius: var(--radius-md); }

/* 底部 */
footer { border-top: 1px solid var(--glass-border); padding: 80px 20px 40px; background: var(--bg-surface); margin-top: 60px; transition: all 0.4s ease; }
.footer-grid { max-width: 1240px; margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 60px; }
.footer-brand p { color: var(--text-secondary); font-size: 14px; margin-top: 16px; max-width: 300px; }
.footer-links h4 { font-size: 16px; margin-bottom: 24px; color: var(--text-primary); }
.footer-links a, .footer-links p { display: block; color: var(--text-secondary); text-decoration: none; font-size: 14px; margin-bottom: 16px; transition: color 0.3s ease; }
.footer-links a:hover { color: var(--text-primary); }
.footer-links i { width: 20px; color: var(--accent-color); }
.copyright { text-align: center; color: var(--text-secondary); font-size: 13px; margin-top: 80px; padding-top: 24px; border-top: 1px solid var(--glass-border); }

/* ================= 悬浮客服与实体小窗 UI 样式 ================= */
.chat-fab { position: fixed; bottom: 40px; right: 40px; width: 60px; height: 60px; border-radius: 50%; background: var(--accent-color); box-shadow: 0 10px 30px rgba(0, 102, 204, 0.4); display: flex; align-items: center; justify-content: center; font-size: 24px; color: #fff; cursor: grab; z-index: 9998; transition: transform 0.2s ease, opacity 0.3s ease; touch-action: none; }
.chat-fab:active { cursor: grabbing; transform: scale(0.95); }

.chat-window { position: fixed; bottom: 20px; right: 20px; width: 340px; height: 480px; background: var(--chat-bg); border: 1px solid var(--chat-border); border-radius: var(--radius-lg); box-shadow: 0 15px 40px rgba(0,0,0,0.15); z-index: 9999; display: flex; flex-direction: column; overflow: hidden; opacity: 0; transform: translateY(20px) scale(0.95); pointer-events: none; transition: all 0.3s var(--ease-out-expo); }
[data-theme="dark"] .chat-window { box-shadow: 0 15px 40px rgba(0,0,0,0.8); }
.chat-window.active { opacity: 1; transform: translateY(0) scale(1); pointer-events: auto; }

.chat-header { padding: 16px 20px; background: var(--chat-header); border-bottom: 1px solid var(--chat-border); display: flex; justify-content: space-between; align-items: center; font-weight: 600; color: var(--text-primary); }
.chat-header span { display: flex; align-items: center; gap: 8px; }
.chat-header i { color: var(--accent-color); }
.chat-close-btn { cursor: pointer; color: var(--text-secondary); transition: color 0.2s; font-size: 18px; }
.chat-close-btn:hover { color: var(--text-primary); }

.chat-body { flex: 1; padding: 20px; overflow-y: auto; display: flex; flex-direction: column; gap: 16px; background: var(--chat-bg); }
.chat-body::-webkit-scrollbar { width: 4px; }
.chat-body::-webkit-scrollbar-thumb { background: var(--glass-border); border-radius: 4px; }

.chat-msg { display: flex; flex-direction: column; max-width: 85%; }
.chat-msg.agent { align-self: flex-start; }
.chat-msg.user { align-self: flex-end; }

.msg-bubble { padding: 12px 16px; border-radius: 16px; font-size: 14px; line-height: 1.5; }
.chat-msg.agent .msg-bubble { background: var(--chat-bubble-agent); border-top-left-radius: 4px; color: var(--text-primary); }
.chat-msg.user .msg-bubble { background: var(--accent-color); border-top-right-radius: 4px; color: #fff; }
.msg-time { font-size: 11px; color: var(--text-secondary); margin-top: 4px; padding: 0 4px; }
.chat-msg.user .msg-time { text-align: right; }

.chat-footer { padding: 16px; background: var(--chat-header); border-top: 1px solid var(--chat-border); }
.chat-tools { display: flex; gap: 16px; margin-bottom: 12px; color: var(--text-secondary); font-size: 18px; }
.chat-tools i { cursor: pointer; transition: color 0.2s; }
.chat-tools i:hover { color: var(--accent-color); }

.chat-input-wrapper { display: flex; gap: 10px; }
.chat-input-wrapper input { flex: 1; background: var(--chat-input-bg); border: 1px solid var(--chat-border); border-radius: 20px; padding: 10px 16px; color: var(--text-primary); font-size: 14px; }
.chat-input-wrapper input::placeholder { color: var(--text-secondary); }
.chat-input-wrapper button { width: 40px; height: 40px; border-radius: 50%; background: var(--accent-color); border: none; color: #fff; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: transform 0.2s; }
.chat-input-wrapper button:active { transform: scale(0.9); }

/* 移动端适配 */
@media (max-width: 992px) {
    .about-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 40px; }
}
@media (max-width: 768px) {
    /* 修复移动端内联样式导致的模块偏移和挤压 */
    html, body { overflow-x: hidden; width: 100%; }
    .glass-panel { padding: 25px 20px !important; }
    .section { padding: 60px 15px !important; }
    .hero { padding: 100px 15px 40px !important; }
    .about-grid { direction: ltr !important; }
    .about-content { direction: ltr !important; }
    .grid-3, .grid-4 { grid-template-columns: 1fr !important; gap: 20px !important; }
    .btn { padding: 14px 20px !important; width: 100%; justify-content: center; }
    .btn-group { flex-direction: column; gap: 15px; }
    .copyright span { display: inline-block; margin-left: 0 !important; margin-top: 5px; }

    .navbar { width: calc(100% - 32px); padding: 0 12px; }
    .logo-inner { padding: 6px 12px; }
    .logo-inner span { max-width: 130px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; display: inline-block; vertical-align: middle; }
    .nav-center {
        position: absolute; top: 80px; left: 0; width: 100%; background: var(--bg-surface); backdrop-filter: blur(40px); -webkit-backdrop-filter: blur(40px); border: 1px solid var(--glass-border); border-radius: var(--radius-lg); flex-direction: column; padding: 30px 20px; gap: 24px; text-align: center; opacity: 0; pointer-events: none; transition: all 0.3s ease; box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    }
    [data-theme="dark"] .nav-center { background: rgba(17, 17, 19, 0.95); box-shadow: 0 20px 40px rgba(0,0,0,0.8); }
    .nav-center.active { opacity: 1; pointer-events: auto; }
    .nav-center a { font-size: 16px; padding: 10px; display: block; }
    .menu-toggle { display: block; }
    .btn { width: 100%; }
    .about-stats { grid-template-columns: 1fr; }
    .chat-fab { bottom: 20px; right: 20px; width: 50px; height: 50px; font-size: 20px; }
    .chat-window { bottom: 10px; right: 10px; left: 10px; width: auto; height: 450px; }
}