* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Inter', sans-serif; background: #0A0A0F; color: #fff; overflow-x: hidden; }

#particle-canvas { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none; }
.bg-gradient { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: radial-gradient(ellipse at 20% 30%, #0F0F1A 0%, #0A0A0F 100%); z-index: -1; }
.glow-orb { position: fixed; border-radius: 50%; filter: blur(100px); opacity: 0.25; pointer-events: none; z-index: -1; }
.orb-1 { width: 50vw; height: 50vw; background: #0052CC; top: -20vh; left: -10vw; animation: float1 20s ease-in-out infinite; }
.orb-2 { width: 40vw; height: 40vw; background: #00C6FF; bottom: -10vh; right: -5vw; opacity: 0.15; animation: float2 25s ease-in-out infinite; }
.orb-3 { width: 30vw; height: 30vw; background: #7C3AED; top: 40vh; right: 10vw; opacity: 0.08; animation: float1 30s ease-in-out infinite; }
@keyframes float1 { 0%,100%{transform:translate(0,0)} 50%{transform:translate(5%,5%)} }
@keyframes float2 { 0%,100%{transform:translate(0,0)} 50%{transform:translate(-5%,-5%)} }

.container { max-width: 1280px; margin: 0 auto; padding: 0 2rem; position: relative; z-index: 2; }

/* 网格背景 */
.grid-bg { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-image: linear-gradient(rgba(0,198,255,0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(0,198,255,0.03) 1px, transparent 1px); background-size: 60px 60px; z-index: 0; pointer-events: none; mask-image: radial-gradient(ellipse at center, black 20%, transparent 80%); -webkit-mask-image: radial-gradient(ellipse at center, black 20%, transparent 80%); }

/* 导航栏 */
.navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 100; padding: 1rem 2rem; transition: all 0.3s ease; background: rgba(10,10,15,0.5); backdrop-filter: blur(12px); }
.navbar.scrolled { background: rgba(10,10,15,0.95); border-bottom: 1px solid rgba(0,198,255,0.3); padding: 0.75rem 2rem; }
.nav-container { max-width: 1280px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; }
.logo { display: flex; align-items: center; gap: 0.5rem; font-size: 1.3rem; font-weight: 700; text-decoration: none; color: white; }
.logo-icon { width: 36px; height: 36px; background: linear-gradient(135deg, #0052CC, #00C6FF); border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 1.2rem; }
.logo-text span { background: linear-gradient(135deg, #fff, #00C6FF); -webkit-background-clip: text; background-clip: text; color: transparent; }
.nav-links { display: flex; gap: 2rem; align-items: center; }
.nav-links a { color: #E8EDF2; text-decoration: none; font-weight: 500; font-size: 0.95rem; transition: color 0.2s; }
.nav-links a:hover { color: #00C6FF; }
.menu-btn { display: none; font-size: 1.5rem; cursor: pointer; }

/* Hero */
.hero { min-height: 100vh; display: flex; align-items: center; padding: 100px 0 60px; }
.hero-content { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.hero h1 { font-size: 3.8rem; font-weight: 800; line-height: 1.2; margin-bottom: 1.5rem; letter-spacing: -0.02em; }
.gradient-text { background: linear-gradient(135deg, #fff 0%, #00C6FF 50%, #0052CC 100%); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p { font-size: 1.1rem; color: #9BA3B5; line-height: 1.6; margin-bottom: 2rem; }
.btn-primary { background: linear-gradient(135deg, #0052CC, #00C6FF); padding: 0.9rem 2rem; border-radius: 40px; text-decoration: none; color: white; font-weight: 600; transition: all 0.3s; display: inline-flex; align-items: center; gap: 0.5rem; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 25px -5px rgba(0,82,204,0.4); }
.btn-secondary { background: rgba(255,255,255,0.05); border: 1px solid rgba(0,198,255,0.3); padding: 0.9rem 2rem; border-radius: 40px; text-decoration: none; color: white; font-weight: 600; transition: all 0.3s; display: inline-flex; align-items: center; gap: 0.5rem; }
.btn-secondary:hover { background: rgba(0,198,255,0.1); border-color: #00C6FF; }
.hero-sphere { position: relative; width: 100%; aspect-ratio: 1; }
canvas#sphereCanvas { width: 100%; height: 100%; border-radius: 50%; }

/* 通用 Section */
.section { padding: 80px 0; position: relative; z-index: 2; }
.section-header { text-align: center; margin-bottom: 3rem; }
.section-header h2 { font-size: 2.2rem; margin-bottom: 1rem; }
.section-header p { color: #9BA3B5; font-size: 1rem; }

/* 四大入口卡片 */
.cards-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
.entrance-card { background: rgba(255,255,255,0.03); backdrop-filter: blur(10px); border: 1px solid rgba(255,255,255,0.08); border-radius: 1.5rem; padding: 2rem; text-align: center; transition: all 0.3s; cursor: pointer; text-decoration: none; display: block; color: white; }
.entrance-card:hover { transform: translateY(-8px); border-color: rgba(0,198,255,0.6); box-shadow: 0 20px 35px -15px rgba(0,198,255,0.2); background: rgba(255,255,255,0.06); }
.entrance-icon { width: 70px; height: 70px; background: linear-gradient(135deg, rgba(0,82,204,0.2), rgba(0,198,255,0.2)); border-radius: 1.2rem; display: flex; align-items: center; justify-content: center; margin: 0 auto 1.2rem; font-size: 2.2rem; color: #00C6FF; }
.entrance-card h3 { font-size: 1.3rem; margin-bottom: 0.5rem; }
.entrance-card p { color: #9BA3B5; font-size: 0.85rem; margin-bottom: 1rem; }
.entrance-link { color: #00C6FF; font-size: 0.85rem; display: inline-flex; align-items: center; gap: 0.3rem; }

/* 课程卡片 */
.courses-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 2rem; flex-wrap: wrap; }
.view-all { color: #00C6FF; text-decoration: none; }
.courses-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1.5rem; }
.course-card { background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.05); border-radius: 1rem; padding: 1.2rem; transition: all 0.3s; }
.course-card:hover { transform: translateY(-4px); border-color: rgba(0,198,255,0.3); background: rgba(255,255,255,0.05); }
.course-icon { font-size: 2rem; margin-bottom: 0.8rem; }
.course-tag { display: inline-block; background: rgba(0,198,255,0.12); color: #00C6FF; padding: 0.2rem 0.6rem; border-radius: 20px; font-size: 0.65rem; margin-bottom: 0.6rem; }
.course-title { font-size: 0.95rem; font-weight: 600; margin-bottom: 0.3rem; }
.course-desc { color: #9BA3B5; font-size: 0.7rem; line-height: 1.4; margin-bottom: 0.8rem; }
.course-meta { display: flex; justify-content: space-between; font-size: 0.65rem; color: #6B7280; margin-bottom: 0.8rem; }
.course-link { color: #00C6FF; font-size: 0.7rem; text-decoration: none; }

/* AI工具集预览 */
.tools-preview { background: linear-gradient(135deg, rgba(0,82,204,0.08), rgba(0,198,255,0.03)); border-radius: 2rem; padding: 2rem; border: 1px solid rgba(0,198,255,0.1); text-align: center; }
.tools-categories { display: flex; flex-wrap: wrap; justify-content: center; gap: 1rem; margin-top: 1.5rem; }
.tool-cat { background: rgba(255,255,255,0.05); padding: 0.6rem 1.2rem; border-radius: 40px; color: #E8EDF2; text-decoration: none; font-size: 0.85rem; transition: all 0.2s; }
.tool-cat:hover { background: rgba(0,198,255,0.2); color: #00C6FF; transform: translateY(-2px); }

/* OPC预览 */
.opc-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; margin-top: 1.5rem; }
.opc-card { background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.05); border-radius: 1rem; padding: 1.5rem; text-align: center; transition: all 0.3s; text-decoration: none; display: block; color: white; }
.opc-card:hover { transform: translateY(-4px); border-color: rgba(0,198,255,0.3); }
.opc-icon { font-size: 2rem; margin-bottom: 0.8rem; }
.opc-card h4 { font-size: 1rem; margin-bottom: 0.3rem; color: white; }
.opc-card p { font-size: 0.75rem; color: #9BA3B5; }

/* 页脚 */
.footer { border-top: 1px solid rgba(255,255,255,0.05); padding: 3rem 0; margin-top: 3rem; position: relative; z-index: 2; }
.footer-content { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 2rem; }
.footer-col h4 { margin-bottom: 1rem; font-size: 0.9rem; }
.footer-col p, .footer-col a { color: #6B7280; font-size: 0.85rem; text-decoration: none; display: block; margin-bottom: 0.5rem; transition: color 0.2s; }
.footer-col a:hover { color: #00C6FF; }
.footer-bottom { text-align: center; padding-top: 2rem; margin-top: 2rem; border-top: 1px solid rgba(255,255,255,0.05); font-size: 0.75rem; color: #6B7280; }

/* Fade up 动画 */
.fade-up { opacity: 0; transform: translateY(30px); transition: all 0.6s ease-out; }
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* 页面标题区 */
.page-hero { min-height: 50vh; display: flex; align-items: center; padding: 120px 0 60px; text-align: center; }
.page-hero h1 { font-size: 3rem; font-weight: 800; margin-bottom: 1rem; }
.page-hero p { font-size: 1.1rem; color: #9BA3B5; max-width: 700px; margin: 0 auto; }
.breadcrumbs { color: #6B7280; font-size: 0.85rem; margin-bottom: 1rem; }
.breadcrumbs a { color: #00C6FF; text-decoration: none; }

/* 工具卡片网格 */
.tools-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
.tool-card { background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.05); border-radius: 1rem; padding: 1.5rem; transition: all 0.3s; text-decoration: none; display: block; color: white; }
.tool-card:hover { transform: translateY(-4px); border-color: rgba(0,198,255,0.3); background: rgba(255,255,255,0.06); }
.tool-card .tool-icon { font-size: 2rem; margin-bottom: 0.8rem; }
.tool-card h4 { font-size: 1rem; margin-bottom: 0.3rem; }
.tool-card p { color: #9BA3B5; font-size: 0.8rem; line-height: 1.4; }

/* 分类标签 */
.cat-tabs { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-bottom: 2rem; justify-content: center; }
.cat-tab { background: rgba(255,255,255,0.05); padding: 0.5rem 1.2rem; border-radius: 40px; color: #E8EDF2; text-decoration: none; font-size: 0.85rem; transition: all 0.2s; border: 1px solid transparent; }
.cat-tab:hover, .cat-tab.active { background: rgba(0,198,255,0.15); color: #00C6FF; border-color: rgba(0,198,255,0.3); }

/* 提示词卡片 */
.prompts-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.prompt-card { background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.05); border-radius: 1rem; padding: 1.5rem; transition: all 0.3s; }
.prompt-card:hover { border-color: rgba(0,198,255,0.3); background: rgba(255,255,255,0.05); }
.prompt-card h4 { font-size: 1.1rem; margin-bottom: 0.5rem; color: #00C6FF; }
.prompt-card .prompt-scene { color: #9BA3B5; font-size: 0.85rem; margin-bottom: 0.8rem; font-style: italic; }
.prompt-card .prompt-text { background: rgba(0,0,0,0.3); padding: 1rem; border-radius: 0.5rem; font-family: 'Courier New', monospace; font-size: 0.85rem; line-height: 1.6; white-space: pre-wrap; border-left: 3px solid #00C6FF; }

/* 社群转化页样式 */
.community-hero { min-height: 100vh; display: flex; align-items: center; padding: 100px 0 60px; }
.community-box { background: rgba(255,255,255,0.03); border: 1px solid rgba(0,198,255,0.2); border-radius: 2rem; padding: 3rem; text-align: center; max-width: 800px; margin: 0 auto; backdrop-filter: blur(10px); }
.community-box h1 { font-size: 2.5rem; font-weight: 800; margin-bottom: 1rem; }
.community-box p { color: #9BA3B5; font-size: 1.05rem; line-height: 1.7; margin-bottom: 2rem; }
.qr-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; margin: 2rem 0; }
.qr-card { background: rgba(255,255,255,0.05); border-radius: 1.5rem; padding: 2rem; border: 1px solid rgba(255,255,255,0.08); }
.qr-card h3 { font-size: 1.2rem; margin-bottom: 1rem; color: #00C6FF; }
.qr-placeholder { width: 200px; height: 200px; margin: 0 auto 1rem; background: linear-gradient(135deg, #1a1a2e, #0f0f1a); border: 2px dashed rgba(0,198,255,0.3); border-radius: 1rem; display: flex; align-items: center; justify-content: center; color: #6B7280; font-size: 0.85rem; }
.benefits-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin-top: 2rem; }
.benefit-item { background: rgba(255,255,255,0.03); border-radius: 1rem; padding: 1.5rem; border: 1px solid rgba(255,255,255,0.05); }
.benefit-item .icon { font-size: 2rem; color: #00C6FF; margin-bottom: 0.5rem; }
.benefit-item h4 { font-size: 1rem; margin-bottom: 0.3rem; }
.benefit-item p { color: #9BA3B5; font-size: 0.85rem; }

@media (max-width: 1100px) {
    .courses-grid { grid-template-columns: repeat(3, 1fr); }
    .tools-grid { grid-template-columns: repeat(3, 1fr); }
    .opc-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 900px) {
    .hero-content { grid-template-columns: 1fr; text-align: center; }
    .cards-4 { grid-template-columns: repeat(2, 1fr); }
    .courses-grid { grid-template-columns: repeat(2, 1fr); }
    .tools-grid { grid-template-columns: repeat(2, 1fr); }
    .opc-grid { grid-template-columns: repeat(2, 1fr); }
    .prompts-grid { grid-template-columns: 1fr; }
    .footer-content { grid-template-columns: 1fr; text-align: center; }
    .nav-links { display: none; }
    .nav-links.active { display: flex; flex-direction: column; position: absolute; top: 70px; left: 0; right: 0; background: #0A0A0F; padding: 2rem; border-bottom: 1px solid rgba(0,198,255,0.2); }
    .menu-btn { display: block; }
    .hero h1 { font-size: 2.2rem; }
    .page-hero h1 { font-size: 2rem; }
    .community-box { padding: 2rem 1.5rem; }
    .qr-grid { grid-template-columns: 1fr; }
    .benefits-grid { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
    .cards-4 { grid-template-columns: 1fr; }
    .courses-grid { grid-template-columns: 1fr; }
    .tools-grid { grid-template-columns: 1fr; }
    .opc-grid { grid-template-columns: 1fr; }
}

/* AI悬浮智能助手 */
.ai-assistant-btn { position: fixed; bottom: 30px; right: 30px; width: 60px; height: 60px; background: linear-gradient(135deg, #0052CC, #00C6FF); border-radius: 50%; display: flex; align-items: center; justify-content: center; cursor: pointer; z-index: 999; font-size: 1.6rem; transition: all 0.3s; box-shadow: 0 4px 20px rgba(0,198,255,0.4); border: none; color: white; }
.ai-assistant-btn:hover { transform: scale(1.1); box-shadow: 0 6px 30px rgba(0,198,255,0.6); }
.ai-assistant-btn .pulse-ring { position: absolute; width: 100%; height: 100%; border-radius: 50%; border: 2px solid rgba(0,198,255,0.5); animation: pulse-ring 2s ease-out infinite; }
@keyframes pulse-ring { 0% { transform: scale(1); opacity: 1; } 100% { transform: scale(1.5); opacity: 0; } }
.ai-chat-popup { position: fixed; bottom: 100px; right: 30px; width: 360px; max-height: 480px; background: rgba(10, 10, 20, 0.95); backdrop-filter: blur(20px); border: 1px solid rgba(0,198,255,0.3); border-radius: 1.5rem; z-index: 998; display: none; flex-direction: column; overflow: hidden; box-shadow: 0 20px 50px rgba(0,0,0,0.5); }
.ai-chat-popup.open { display: flex; }
.ai-chat-header { background: linear-gradient(135deg, #0052CC, #00C6FF); padding: 1rem 1.5rem; display: flex; justify-content: space-between; align-items: center; }
.ai-chat-header h4 { font-size: 1rem; font-weight: 600; color: white; }
.ai-chat-close { background: none; border: none; color: white; font-size: 1.3rem; cursor: pointer; opacity: 0.8; transition: opacity 0.2s; }
.ai-chat-close:hover { opacity: 1; }
.ai-chat-body { padding: 1.5rem; overflow-y: auto; flex: 1; }
.ai-chat-body .chat-msg { background: rgba(255,255,255,0.06); border-radius: 1rem; padding: 1rem; margin-bottom: 1rem; color: #E8EDF2; font-size: 0.9rem; line-height: 1.6; }
.ai-chat-body .chat-msg p { margin-bottom: 0.5rem; }
.ai-chat-body .chat-msg p:last-child { margin-bottom: 0; }
.ai-chat-footer { padding: 1rem 1.5rem; border-top: 1px solid rgba(255,255,255,0.08); }
.ai-chat-footer .btn-primary { width: 100%; text-align: center; justify-content: center; padding: 0.7rem 0; font-size: 0.9rem; }
@media (max-width: 600px) {
    .ai-chat-popup { width: calc(100vw - 40px); right: 20px; bottom: 90px; }
    .ai-assistant-btn { bottom: 20px; right: 20px; width: 50px; height: 50px; font-size: 1.3rem; }
}

/* 全局底部社群引导栏 */
.community-cta { background: linear-gradient(135deg, rgba(0,82,204,0.15), rgba(0,198,255,0.08)); border-top: 1px solid rgba(0,198,255,0.2); border-bottom: 1px solid rgba(0,198,255,0.1); padding: 2rem 0; margin-top: 2rem; position: relative; z-index: 2; }

/* ========== 新增增强样式 ========== */

/* Hero 增强 */
.hero { min-height: 100vh; display: flex; align-items: center; padding: 100px 0 60px; position: relative; overflow: hidden; }
.hero-waves { position: absolute; bottom: 0; left: 0; width: 100%; height: 120px; opacity: 0.1; }
.hero-badge { display: inline-flex; align-items: center; gap: 0.5rem; background: rgba(0,198,255,0.1); border: 1px solid rgba(0,198,255,0.3); padding: 0.4rem 1rem; border-radius: 40px; font-size: 0.8rem; color: #00C6FF; margin-bottom: 1.5rem; animation: fadeInUp 0.8s ease-out; }
.hero-badges { display: flex; gap: 0.8rem; flex-wrap: wrap; margin-bottom: 1rem; }
.hero-stat-row { display: flex; gap: 2rem; margin-top: 2.5rem; padding-top: 2rem; border-top: 1px solid rgba(255,255,255,0.08); }
.hero-stat { text-align: center; }
.hero-stat-num { font-size: 1.8rem; font-weight: 800; background: linear-gradient(135deg, #fff, #00C6FF); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-stat-label { font-size: 0.75rem; color: #6B7280; margin-top: 0.2rem; }
.hero-content { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.hero-left { position: relative; z-index: 2; }
.hero-right { position: relative; }

/* 3D 浮动卡片 */
.float-card { position: absolute; background: rgba(255,255,255,0.08); backdrop-filter: blur(10px); border: 1px solid rgba(255,255,255,0.12); border-radius: 1rem; padding: 0.8rem 1.2rem; display: flex; align-items: center; gap: 0.6rem; font-size: 0.85rem; white-space: nowrap; animation: float3D 6s ease-in-out infinite; transform-style: preserve-3d; }
.float-card-1 { top: 10%; left: -10%; animation-delay: 0s; }
.float-card-2 { top: 50%; right: -5%; animation-delay: 2s; }
.float-card-3 { bottom: 15%; left: 5%; animation-delay: 4s; }
@keyframes float3D { 0%,100%{transform:translateY(0) rotateX(0) rotateY(0)} 25%{transform:translateY(-15px) rotateX(5deg) rotateY(5deg)} 50%{transform:translateY(-25px) rotateX(0) rotateY(0)} 75%{transform:translateY(-15px) rotateX(-5deg) rotateY(-5deg)} }

/* 3D tilt 效果 */
.tilt-card { transform-style: preserve-3d; perspective: 1000px; transition: transform 0.3s; }
.tilt-card:hover { transform: rotateX(5deg) rotateY(5deg) translateZ(10px); }

/* Feature cards */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.feature-card { background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.06); border-radius: 1.2rem; padding: 1.8rem; transition: all 0.3s; }
.feature-card:hover { transform: translateY(-6px); border-color: rgba(0,198,255,0.4); box-shadow: 0 20px 40px -15px rgba(0,198,255,0.15); }
.feature-icon { width: 50px; height: 50px; background: linear-gradient(135deg, rgba(0,82,204,0.3), rgba(0,198,255,0.3)); border-radius: 1rem; display: flex; align-items: center; justify-content: center; font-size: 1.5rem; margin-bottom: 1rem; }
.feature-card h4 { font-size: 1.1rem; margin-bottom: 0.5rem; }
.feature-card p { color: #9BA3B5; font-size: 0.85rem; line-height: 1.5; }

/* Stats band */
.stats-band { background: linear-gradient(135deg, rgba(0,82,204,0.15), rgba(0,198,255,0.08)); border-top: 1px solid rgba(0,198,255,0.15); border-bottom: 1px solid rgba(0,198,255,0.15); padding: 3rem 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; text-align: center; }
.stat-item .stat-num { font-size: 2.5rem; font-weight: 800; background: linear-gradient(135deg, #fff, #00C6FF); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat-item .stat-label { color: #9BA3B5; font-size: 0.9rem; margin-top: 0.3rem; }
.stat-item .stat-icon { font-size: 2rem; margin-bottom: 0.5rem; }

/* Student testimonials */
.testimonials-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
.testimonial-card { background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.06); border-radius: 1.2rem; padding: 1.8rem; transition: all 0.3s; }
.testimonial-card:hover { border-color: rgba(0,198,255,0.3); transform: translateY(-4px); }
.testimonial-header { display: flex; align-items: center; gap: 1rem; margin-bottom: 1rem; }
.testimonial-avatar { width: 48px; height: 48px; border-radius: 50%; background: linear-gradient(135deg, #0052CC, #00C6FF); display: flex; align-items: center; justify-content: center; font-size: 1.2rem; flex-shrink: 0; }
.testimonial-name { font-weight: 600; font-size: 0.95rem; }
.testimonial-course { font-size: 0.75rem; color: #00C6FF; }
.testimonial-result { background: rgba(0,198,255,0.08); border-radius: 0.5rem; padding: 0.8rem; margin-top: 1rem; font-size: 0.85rem; color: #E8EDF2; border-left: 3px solid #00C6FF; }
.testimonial-card p { color: #9BA3B5; font-size: 0.85rem; line-height: 1.6; }

/* Scroll indicator */
.scroll-indicator { position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%); animation: bounce 2s ease-in-out infinite; }
@keyframes bounce { 0%,100%{transform:translateX(-50%) translateY(0)} 50%{transform:translateX(-50%) translateY(10px)} }

/* Hero floating elements */
.float-element { position: absolute; animation: float 6s ease-in-out infinite; opacity: 0.6; pointer-events: none; }
@keyframes float { 0%,100%{transform:translateY(0) rotate(0deg)} 50%{transform:translateY(-20px) rotate(5deg)} }

/* fadeInUp animation */
@keyframes fadeInUp { from{opacity:0;transform:translateY(20px)} to{opacity:1;transform:translateY(0)} }

/* Responsive adjustments */
@media (max-width: 1100px) {
    .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px) {
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .testimonials-grid { grid-template-columns: 1fr; }
    .hero-stat-row { gap: 1rem; }
    .hero-content { grid-template-columns: 1fr; text-align: center; }
    .hero-left { order: 2; }
    .hero-right { order: 1; }
    .float-card { display: none; }
}
@media (max-width: 600px) {
    .features-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .hero-stat-row { flex-wrap: wrap; justify-content: center; }
}

/* 导航高亮 */
.active-nav { color: #00C6FF !important; }

/* 产品中心 */
.products-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.product-card { background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.06); border-radius: 1.2rem; padding: 1.8rem; position: relative; overflow: hidden; transition: all 0.3s; }
.product-card:hover { transform: translateY(-6px); border-color: rgba(0,198,255,0.4); box-shadow: 0 20px 40px -15px rgba(0,198,255,0.15); }
.product-badge { position: absolute; top: 1rem; right: 1rem; background: rgba(0,198,255,0.15); color: #00C6FF; font-size: 0.7rem; padding: 0.2rem 0.6rem; border-radius: 20px; font-weight: 600; }
.product-icon { font-size: 2.5rem; margin-bottom: 1rem; }
.product-title { font-size: 1.15rem; font-weight: 700; margin-bottom: 0.5rem; }
.product-desc { color: #9BA3B5; font-size: 0.82rem; line-height: 1.5; margin-bottom: 1rem; }
.product-price { margin-bottom: 1rem; }
.price-old { color: #6B7280; text-decoration: line-through; font-size: 0.85rem; margin-right: 0.5rem; }
.price-new { font-size: 1.4rem; font-weight: 700; color: #00C6FF; }
.product-btn { display: block; background: linear-gradient(135deg, #0052CC, #00C6FF); padding: 0.7rem 0; border-radius: 40px; text-align: center; color: white; text-decoration: none; font-weight: 600; font-size: 0.9rem; transition: all 0.3s; }
.product-btn:hover { box-shadow: 0 8px 20px -5px rgba(0,198,255,0.4); transform: translateY(-2px); }
@media (max-width: 900px) { .products-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .products-grid { grid-template-columns: 1fr; } }

/* ========== 搜索栏 (ai-bot.cn 参考) ========== */
.search-section { padding: 0 0 40px; position: relative; z-index: 2; }
.search-wrapper { max-width: 720px; margin: 0 auto; }
.search-box { display: flex; background: rgba(255,255,255,0.06); border: 1px solid rgba(0,198,255,0.2); border-radius: 50px; padding: 0.5rem 0.5rem 0.5rem 1.5rem; backdrop-filter: blur(10px); transition: all 0.3s; }
.search-box:focus-within { border-color: rgba(0,198,255,0.5); box-shadow: 0 0 30px rgba(0,198,255,0.15); }
.search-box input { flex: 1; background: none; border: none; color: white; font-size: 1rem; outline: none; font-family: 'Inter', sans-serif; }
.search-box input::placeholder { color: #6B7280; }
.search-box button { background: linear-gradient(135deg, #0052CC, #00C6FF); border: none; border-radius: 40px; padding: 0.7rem 1.8rem; color: white; font-weight: 600; cursor: pointer; font-size: 0.9rem; transition: all 0.3s; }
.search-box button:hover { box-shadow: 0 8px 20px -5px rgba(0,198,255,0.4); }
.search-tags { display: flex; gap: 0.5rem; margin-top: 0.8rem; flex-wrap: wrap; justify-content: center; }
.search-tag { background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.08); padding: 0.3rem 0.9rem; border-radius: 20px; font-size: 0.75rem; color: #9BA3B5; cursor: pointer; transition: all 0.2s; }
.search-tag:hover { background: rgba(0,198,255,0.15); color: #00C6FF; border-color: rgba(0,198,255,0.3); }

/* ========== 数据统计带 (ai-bot.cn 参考) ========== */
.stats-band { background: linear-gradient(135deg, rgba(0,82,204,0.1), rgba(0,198,255,0.05)); border-top: 1px solid rgba(0,198,255,0.12); border-bottom: 1px solid rgba(0,198,255,0.12); padding: 2.5rem 0; position: relative; z-index: 2; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; text-align: center; }
.stat-item { padding: 0.5rem; }
.stat-icon { font-size: 1.8rem; margin-bottom: 0.3rem; }
.stat-num { font-size: 2.2rem; font-weight: 800; background: linear-gradient(135deg, #fff, #00C6FF); -webkit-background-clip: text; background-clip: text; color: transparent; font-variant-numeric: tabular-nums; }
.stat-suffix { font-size: 1rem; color: #00C6FF; }
.stat-label { color: #9BA3B5; font-size: 0.85rem; margin-top: 0.2rem; }

/* ========== 热门/最新 双Tab (ai-bot.cn 参考) ========== */
.tab-switch { display: flex; justify-content: center; gap: 0; margin-bottom: 2rem; background: rgba(255,255,255,0.04); border-radius: 50px; padding: 4px; width: fit-content; margin-left: auto; margin-right: auto; }
.tab-switch-btn { padding: 0.6rem 1.8rem; border-radius: 50px; border: none; background: transparent; color: #9BA3B5; cursor: pointer; font-size: 0.9rem; font-weight: 500; transition: all 0.3s; font-family: 'Inter', sans-serif; }
.tab-switch-btn.active { background: linear-gradient(135deg, #0052CC, #00C6FF); color: white; box-shadow: 0 4px 15px rgba(0,82,204,0.3); }
.tab-switch-btn:hover:not(.active) { color: #E8EDF2; }

.tool-grid-hot { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.2rem; }
.tool-item-card { background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.06); border-radius: 1rem; padding: 1.2rem; transition: all 0.3s; text-decoration: none; display: flex; align-items: center; gap: 0.8rem; color: white; }
.tool-item-card:hover { transform: translateY(-3px); border-color: rgba(0,198,255,0.4); background: rgba(255,255,255,0.06); box-shadow: 0 12px 25px -10px rgba(0,198,255,0.12); }
.tool-item-icon { width: 42px; height: 42px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 1.3rem; flex-shrink: 0; }
.tool-item-icon.blue { background: rgba(0,82,204,0.2); }
.tool-item-icon.cyan { background: rgba(0,198,255,0.15); }
.tool-item-icon.purple { background: rgba(124,58,237,0.2); }
.tool-item-icon.green { background: rgba(16,185,129,0.15); }
.tool-item-icon.orange { background: rgba(249,115,22,0.15); }
.tool-item-info { min-width: 0; }
.tool-item-info h4 { font-size: 0.9rem; margin-bottom: 0.15rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tool-item-info p { font-size: 0.7rem; color: #6B7280; line-height: 1.35; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.tool-item-new-badge { font-size: 0.6rem; background: rgba(16,185,129,0.2); color: #10B981; padding: 0.1rem 0.5rem; border-radius: 10px; margin-left: 0.3rem; }
.tool-item-hot-badge { font-size: 0.6rem; background: rgba(249,115,22,0.2); color: #F97316; padding: 0.1rem 0.5rem; border-radius: 10px; margin-left: 0.3rem; }
.tool-tab-content { display: none; }
.tool-tab-content.active { display: block; }
.tool-view-more { text-align: center; margin-top: 2rem; }

/* ========== 资源下载区 (ai-bot.cn 参考) ========== */
.resource-section { position: relative; z-index: 2; }
.resource-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.resource-card { background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.06); border-radius: 1rem; padding: 1.3rem; transition: all 0.3s; text-decoration: none; display: flex; gap: 1rem; align-items: flex-start; color: white; }
.resource-card:hover { border-color: rgba(0,198,255,0.3); background: rgba(255,255,255,0.06); transform: translateY(-3px); }
.resource-card .res-icon { font-size: 1.8rem; flex-shrink: 0; }
.resource-card h4 { font-size: 0.95rem; margin-bottom: 0.3rem; line-height: 1.4; }
.resource-card p { font-size: 0.75rem; color: #6B7280; line-height: 1.5; }
.resource-card .res-tag { display: inline-block; background: rgba(0,198,255,0.1); color: #00C6FF; padding: 0.2rem 0.6rem; border-radius: 10px; font-size: 0.65rem; margin-top: 0.5rem; }

/* ========== 快讯区 ========== */
.news-ticker { background: rgba(255,255,255,0.03); border: 1px solid rgba(0,198,255,0.1); border-radius: 1rem; padding: 0.8rem 1.5rem; display: flex; align-items: center; gap: 1rem; margin-bottom: 2rem; }
.news-ticker-label { background: rgba(0,198,255,0.15); color: #00C6FF; padding: 0.3rem 0.8rem; border-radius: 20px; font-size: 0.75rem; font-weight: 600; white-space: nowrap; }
.news-ticker-content { flex: 1; overflow: hidden; position: relative; }
.news-ticker-item { color: #9BA3B5; font-size: 0.85rem; white-space: nowrap; }
.news-ticker-item a { color: #E8EDF2; text-decoration: none; transition: color 0.2s; }
.news-ticker-item a:hover { color: #00C6FF; }

/* 搜索高亮动画 */
.search-highlight { animation: searchPulse 0.6s ease-out; }
@keyframes searchPulse { 0% { transform: scale(1.02); box-shadow: 0 0 40px rgba(0,198,255,0.3); } 100% { transform: scale(1); box-shadow: none; } }

/* 响应式 */
@media (max-width: 1100px) { .tool-grid-hot { grid-template-columns: repeat(3, 1fr); } .resource-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 900px) { .tool-grid-hot { grid-template-columns: repeat(2, 1fr); } .stats-grid { grid-template-columns: repeat(2, 1fr); } .resource-grid { grid-template-columns: 1fr; } }
@media (max-width: 600px) { .tool-grid-hot { grid-template-columns: 1fr; } .stats-grid { grid-template-columns: 1fr 1fr; } .stat-num { font-size: 1.6rem; } .search-box { padding: 0.3rem 0.3rem 0.3rem 1rem; } .search-box button { padding: 0.5rem 1.2rem; font-size: 0.8rem; } }