/* service-ai.css - AI智能体页面 v6 | 蓝色系渐变 | UTF-8 */

:root {
  --ac: #2563eb;
  --ac2: #0284c7;
  --ac3: #4f46e5;
  --ac-light: #3b82f6;
  --ac-dark: #1d4ed8;
  --gn: #059669;
  --or: #d97706;
  --rd: #dc2626;
  --bg-main: #f8fafc;
  --bg-alt: #e2e8f0;
  --bg-card: #ffffff;
  --text: #0f172a;
  --text-light: #334155;
  --text-muted: #64748b;
  --border: #cbd5e1;
  --border-glow: rgba(37,99,235,0.4);
  --gradient: linear-gradient(135deg, #0284c7, #2563eb, #4f46e5);
  --gradient2: linear-gradient(135deg, #2563eb, #4f46e5);
  --gradient-soft: linear-gradient(135deg, rgba(2,132,199,0.12), rgba(37,99,235,0.12));
  --shadow-sm: 0 4px 20px rgba(37,99,235,0.12);
  --shadow-md: 0 8px 40px rgba(37,99,235,0.18);
  --shadow-lg: 0 20px 60px rgba(37,99,235,0.22);
}

/* 彩色图标渐变 */
.icon-gradient-1 { background: linear-gradient(135deg, #f472b6, #ec4899); }
.icon-gradient-2 { background: linear-gradient(135deg, #fb923c, #f97316); }
.icon-gradient-3 { background: linear-gradient(135deg, #4ade80, #22c55e); }
.icon-gradient-4 { background: linear-gradient(135deg, #60a5fa, #3b82f6); }
.icon-gradient-5 { background: linear-gradient(135deg, #a78bfa, #8b5cf6); }
.icon-gradient-6 { background: linear-gradient(135deg, #2dd4bf, #14b8a6); }

* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  color: var(--text);
  background: var(--bg-main);
  line-height: 1.8;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

/* ===== 动画 ===== */
@keyframes fadeUp { from { opacity:0; transform:translateY(30px); } to { opacity:1; transform:translateY(0); } }
@keyframes fadeIn { from { opacity:0; } to { opacity:1; } }
@keyframes float { 0%,100% { transform:translateY(0); } 50% { transform:translateY(-15px); } }
@keyframes pulse { 0% { transform:scale(1); opacity:0.6; } 100% { transform:scale(2); opacity:0; } }
@keyframes shimmer { 0% { background-position:-200% 0; } 100% { background-position:200% 0; } }
@keyframes slideInLeft { from { opacity:0; transform:translateX(-20px); } to { opacity:1; transform:translateX(0); } }
@keyframes typingBlink { 0%,100% { opacity:1; } 50% { opacity:0; } }
@keyframes streamCursor { 0%,100% { opacity:1; } 50% { opacity:0; } }
@keyframes bounce { 0%,100% { transform:translateY(0); } 50% { transform:translateY(-5px); } }
@keyframes scaleIn { from { opacity:0; transform:scale(0.9); } to { opacity:1; transform:scale(1); } }

/* ===== 通用 ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 40px; }
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }

.anim { opacity: 0; transform: translateY(30px); transition: all 0.6s ease; }
.anim.visible { opacity: 1; transform: translateY(0); }
.anim.delay-1 { transition-delay: 0.1s; }
.anim.delay-2 { transition-delay: 0.2s; }
.anim.delay-3 { transition-delay: 0.3s; }

.section-hd { text-align: center; margin-bottom: 50px; }
.section-tag {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 20px; border-radius: 50px;
  background: var(--gradient-soft); border: 1px solid var(--border);
  color: var(--ac-dark); font-size: 13px; font-weight: 600;
  margin-bottom: 16px;
}
.section-tag i { font-size: 16px; }
.section-title { font-size: 40px; font-weight: 800; color: var(--text); margin-bottom: 16px; }
.section-title span { background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.section-desc { font-size: 16px; color: var(--text-light); max-width: 600px; margin: 0 auto; }

/* ===== 导航 ===== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 0 40px; height: 70px;
  display: flex; align-items: center; justify-content: space-between;
  background: rgba(240,249,255,0.9); backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: all 0.3s;
}
.nav.scrolled { background: rgba(240,249,255,0.98); border-bottom-color: var(--border); box-shadow: 0 2px 20px rgba(59,130,246,0.08); }
.nav-logo { display: flex; align-items: center; gap: 12px; }
.nav-logo img { height: 36px; }
.nav-links { display: flex; gap: 32px; }
.nav-links a { color: var(--text-light); font-size: 15px; font-weight: 500; transition: color 0.3s; position: relative; }
.nav-links a::after { content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px; background: var(--gradient); transition: width 0.3s; border-radius: 2px; }
.nav-links a:hover { color: var(--ac); }
.nav-links a:hover::after { width: 100%; }
.nav-cta { padding: 10px 24px; border-radius: 50px; background: var(--gradient); color: white; font-size: 14px; font-weight: 600; transition: all 0.3s; box-shadow: 0 4px 15px rgba(59,130,246,0.25); }
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(59,130,246,0.35); }
.nav-mb { display: none; background: none; border: none; color: var(--text); font-size: 24px; cursor: pointer; }

/* ===== Banner ===== */
.banner {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  overflow: hidden; padding: 120px 0 80px;
  background: linear-gradient(180deg, #f0f9ff 0%, #e0f2fe 50%, #cffafe 100%);
}
.banner-particles { position: absolute; inset: 0; pointer-events: none; }
.banner-particles .particle { position: absolute; width: 4px; height: 4px; border-radius: 50%; background: var(--ac); opacity: 0.3; animation: float 6s ease-in-out infinite; }
.banner-glow { position: absolute; border-radius: 50%; pointer-events: none; filter: blur(100px); opacity: 0.25; }
.banner-glow-1 { width: 600px; height: 600px; background: var(--ac2); top: -200px; left: -100px; animation: float 10s ease-in-out infinite; }
.banner-glow-2 { width: 500px; height: 500px; background: var(--ac3); bottom: -100px; right: -100px; animation: float 12s ease-in-out 2s infinite; }
.banner-glow-3 { width: 400px; height: 400px; background: var(--ac); top: 40%; left: 40%; animation: pulse 4s ease-out infinite; }
.banner-grid { position: absolute; inset: 0; pointer-events: none; opacity: 0.03; background-image: linear-gradient(rgba(59,130,246,0.5) 1px, transparent 1px), linear-gradient(90deg, rgba(59,130,246,0.5) 1px, transparent 1px); background-size: 60px 60px; }
.banner-cnt { position: relative; z-index: 2; max-width: 1200px; margin: 0 auto; padding: 0 40px; display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; width: 100%; }
.banner-tag { display: inline-flex; align-items: center; gap: 10px; padding: 8px 16px 8px 8px; border-radius: 50px; background: var(--gradient-soft); border: 1px solid var(--border); color: var(--ac-dark); font-size: 13px; font-weight: 600; margin-bottom: 24px; }
.pulse-dot { width: 20px; height: 20px; border-radius: 50%; background: var(--gradient); position: relative; }
.pulse-dot::before { content: ''; position: absolute; inset: -4px; border-radius: 50%; background: var(--ac); opacity: 0.3; animation: pulse 2s ease-out infinite; }
.banner-title { font-size: 56px; font-weight: 900; color: var(--text); line-height: 1.15; margin-bottom: 24px; }
.banner-title span { background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.banner-desc { font-size: 17px; color: var(--text-light); margin-bottom: 40px; line-height: 1.9; max-width: 520px; }
.banner-btns { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }
.btn-primary { display: inline-flex; align-items: center; gap: 8px; padding: 14px 28px; border-radius: 50px; background: var(--gradient); color: white; font-size: 15px; font-weight: 600; transition: all 0.3s; box-shadow: 0 4px 20px rgba(59,130,246,0.3); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 30px rgba(59,130,246,0.4); }
.btn-secondary { display: inline-flex; align-items: center; gap: 8px; padding: 14px 28px; border-radius: 50px; background: white; border: 1px solid var(--border); color: var(--text); font-size: 15px; font-weight: 500; transition: all 0.3s; }
.btn-secondary:hover { border-color: var(--ac); color: var(--ac); }
.banner-stats { display: flex; gap: 40px; }
.stat-item { text-align: left; }
.stat-num { font-size: 36px; font-weight: 900; background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.stat-label { font-size: 13px; color: var(--text-muted); margin-top: 4px; }

/* ===== AI Demo ===== */
.banner-right { position: relative; }
.ai-demo-wrap { background: white; border: 1px solid var(--border); border-radius: 20px; overflow: hidden; box-shadow: var(--shadow-lg); }
.ai-demo-header { padding: 16px 20px; display: flex; align-items: center; gap: 12px; background: var(--gradient-soft); border-bottom: 1px solid var(--border); }
.ai-demo-dots { display: flex; gap: 6px; }
.ai-demo-dot { width: 12px; height: 12px; border-radius: 50%; background: #cbd5e1; }
.ai-demo-dot:nth-child(1) { background: #0ea5e9; }
.ai-demo-dot:nth-child(2) { background: #3b82f6; }
.ai-demo-dot:nth-child(3) { background: #6366f1; }
.ai-demo-title { flex: 1; display: flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 600; color: var(--text); }
.ai-badge { padding: 3px 10px; border-radius: 50px; font-size: 11px; font-weight: 700; background: var(--gradient); color: white; }
.ai-demo-status { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--gn); font-weight: 500; }
.ai-demo-status::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--gn); animation: pulse 2s ease-out infinite; }
.model-bar { display: flex; gap: 4px; padding: 10px 16px; background: rgba(224,242,254,0.5); border-bottom: 1px solid var(--border); overflow-x: auto; scrollbar-width: none; }
.model-bar::-webkit-scrollbar { display: none; }
.model-tab { padding: 6px 14px; border-radius: 50px; font-size: 12px; font-weight: 500; color: var(--text-muted); cursor: pointer; white-space: nowrap; transition: all 0.3s; border: 1px solid transparent; }
.model-tab:hover { color: var(--text); }
.model-tab.active { background: white; border-color: var(--ac); color: var(--ac); box-shadow: 0 2px 10px rgba(59,130,246,0.1); }
.ai-demo-chat { min-height: 320px; max-height: 380px; overflow-y: auto; padding: 20px; scrollbar-width: thin; scrollbar-color: rgba(59,130,246,0.3) transparent; background: linear-gradient(180deg, #f0f9ff 0%, #fff 100%); }
.ai-demo-chat::-webkit-scrollbar { width: 4px; }
.ai-demo-chat::-webkit-scrollbar-thumb { background: rgba(59,130,246,0.3); border-radius: 4px; }
.chat-msg { display: flex; gap: 10px; margin-bottom: 16px; animation: scaleIn 0.3s ease; }
.chat-msg.user { flex-direction: row-reverse; }
.chat-avatar { width: 36px; height: 36px; border-radius: 12px; flex-shrink: 0; display: flex; align-items: center; justify-content: center; font-size: 16px; }
.chat-msg.ai .chat-avatar { background: var(--gradient); color: white; }
.chat-msg.user .chat-avatar { background: var(--bg-alt); color: var(--text-light); }
.chat-bubble { max-width: 75%; padding: 12px 16px; border-radius: 16px; font-size: 14px; line-height: 1.7; word-break: break-word; }
.chat-msg.ai .chat-bubble { background: white; border: 1px solid var(--border); border-bottom-left-radius: 4px; color: var(--text); }
.chat-msg.user .chat-bubble { background: var(--gradient2); color: white; border-bottom-right-radius: 4px; }
.chat-bubble .msg-h { font-size: 15px; font-weight: 700; color: var(--text); margin-bottom: 8px; }
.chat-msg.user .chat-bubble .msg-h { color: white; }
.chat-bubble .msg-p { margin-bottom: 6px; color: var(--text-light); }
.chat-msg.user .chat-bubble .msg-p { color: rgba(255,255,255,0.9); }
.chat-bubble .msg-list { padding-left: 0; margin: 6px 0; list-style: none; }
.chat-bubble .msg-list li { padding: 4px 0; display: flex; align-items: flex-start; gap: 6px; color: var(--text); font-size: 13px; }
.chat-msg.user .chat-bubble .msg-list li { color: rgba(255,255,255,0.9); }
.chat-bubble .msg-tag { display: inline-flex; align-items: center; gap: 4px; padding: 3px 12px; border-radius: 50px; background: var(--gradient-soft); color: var(--ac-dark); font-size: 12px; margin: 2px; font-weight: 500; }
.chat-msg.user .chat-bubble .msg-tag { background: rgba(255,255,255,0.2); color: white; }
.stream-cursor { display: inline-block; width: 2px; height: 14px; background: var(--ac); margin-left: 1px; vertical-align: middle; animation: streamCursor 0.8s ease-in-out infinite; border-radius: 2px; }
.typing-wrap { display: flex; gap: 10px; align-items: flex-start; animation: fadeIn 0.3s ease; }
.typing-box { padding: 12px 16px; background: white; border: 1px solid var(--border); border-radius: 16px; border-bottom-left-radius: 4px; display: flex; gap: 5px; align-items: center; }
.typing-box span { width: 6px; height: 6px; border-radius: 50%; background: var(--ac); animation: typingBlink 1.4s ease-in-out infinite; display: block; }
.typing-box span:nth-child(2) { animation-delay: 0.2s; }
.typing-box span:nth-child(3) { animation-delay: 0.4s; }
.ai-demo-input { display: flex; gap: 8px; padding: 12px 16px; border-top: 1px solid var(--border); background: white; }
.ai-demo-input input { flex: 1; padding: 10px 16px; border-radius: 50px; background: var(--bg-alt); border: 1px solid var(--border); color: var(--text); font-size: 14px; outline: none; transition: border-color 0.3s; font-family: inherit; }
.ai-demo-input input::placeholder { color: var(--text-muted); }
.ai-demo-input input:focus { border-color: var(--ac); }
.ai-send-btn { padding: 10px 16px; border-radius: 50px; border: none; cursor: pointer; background: var(--gradient); color: white; font-size: 14px; transition: all 0.3s; display: flex; align-items: center; justify-content: center; }
.ai-send-btn:hover { transform: scale(1.05); box-shadow: 0 4px 15px rgba(59,130,246,0.3); }

/* ===== 能力卡片 ===== */
.ability-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.ability-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 20px; padding: 32px; transition: all 0.4s; position: relative; overflow: hidden; }
.ability-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--gradient); transform: scaleX(0); transition: transform 0.3s; }
.ability-card:hover { border-color: var(--border-glow); transform: translateY(-6px); box-shadow: var(--shadow-md); }
.ability-card:hover::before { transform: scaleX(1); }
.ability-icon { width: 60px; height: 60px; border-radius: 16px; margin-bottom: 20px; display: flex; align-items: center; justify-content: center; font-size: 28px; color: white; transition: all 0.3s; }
.ability-card:hover .ability-icon { transform: scale(1.1); }
.ability-card h3 { font-size: 18px; font-weight: 700; color: var(--text); margin-bottom: 10px; }
.ability-card p { font-size: 14px; color: var(--text-light); margin-bottom: 16px; line-height: 1.8; }
.ability-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.ability-tag { padding: 4px 12px; border-radius: 50px; font-size: 12px; background: var(--gradient-soft); color: var(--ac-dark); border: 1px solid rgba(59,130,246,0.15); }

/* ===== Demo亮点 ===== */
.demo-section { padding: 100px 0; background: var(--bg-alt); }
.demo-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.demo-feature-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 20px; padding: 28px; text-align: center; transition: all 0.4s; position: relative; overflow: hidden; }
.demo-feature-card:hover { border-color: var(--border-glow); transform: translateY(-5px); box-shadow: var(--shadow-sm); }
.demo-badge { position: absolute; top: 16px; right: 16px; padding: 3px 10px; border-radius: 50px; font-size: 10px; font-weight: 800; background: var(--gradient); color: white; }
.demo-feature-icon { width: 64px; height: 64px; border-radius: 20px; margin: 0 auto 16px; display: flex; align-items: center; justify-content: center; font-size: 30px; color: white; transition: all 0.3s; }
.demo-feature-card:hover .demo-feature-icon { transform: scale(1.1); }
.demo-feature-card h4 { font-size: 16px; font-weight: 700; color: var(--text); margin-bottom: 8px; }
.demo-feature-card p { font-size: 13px; color: var(--text-muted); }

/* ===== Agent能力 ===== */
.agent-section { padding: 100px 0; background: linear-gradient(180deg, var(--bg-main) 0%, var(--bg-alt) 100%); }
.agent-tabs { display: flex; gap: 8px; margin-bottom: 40px; flex-wrap: wrap; justify-content: center; }
.agent-tab { padding: 12px 28px; border-radius: 50px; font-size: 15px; font-weight: 600; color: var(--text-muted); background: white; border: 1px solid var(--border); cursor: pointer; transition: all 0.3s; }
.agent-tab:hover { border-color: var(--ac); color: var(--ac); }
.agent-tab.active { background: var(--gradient); color: white; border-color: transparent; box-shadow: 0 4px 20px rgba(59,130,246,0.3); }
.agent-content { display: none; }
.agent-content.active { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; animation: fadeIn 0.4s ease; }
.agent-info h3 { font-size: 36px; font-weight: 800; color: var(--text); margin-bottom: 20px; background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.agent-info p { font-size: 16px; color: var(--text-light); line-height: 1.9; margin-bottom: 24px; }
.agent-features { margin-bottom: 32px; }
.agent-feature { display: flex; align-items: center; gap: 12px; padding: 12px 16px; margin-bottom: 12px; background: var(--gradient-soft); border-radius: 12px; border: 1px solid var(--border); transition: all 0.3s; }
.agent-feature:hover { transform: translateX(8px); border-color: var(--ac); }
.agent-feature i { font-size: 20px; color: var(--gn); }
.agent-feature span { font-size: 14px; font-weight: 500; color: var(--text); }
.agent-btn { display: inline-flex; align-items: center; gap: 8px; padding: 14px 32px; border-radius: 50px; background: var(--gradient); color: white; font-size: 15px; font-weight: 600; transition: all 0.3s; box-shadow: 0 4px 20px rgba(59,130,246,0.3); }
.agent-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 25px rgba(59,130,246,0.4); }
.agent-visual { position: relative; border-radius: 24px; overflow: hidden; box-shadow: var(--shadow-lg); }
.agent-visual img { width: 100%; height: auto; display: block; }

/* ===== 行业应用 - 横向滚动 ===== */
.scene-section { padding: 80px 0; overflow: hidden; background: var(--bg-alt); }
.scene-section .section-hd { padding: 0 40px; }
.scene-scroll-wrapper { position: relative; margin-top: 40px; }
.scene-scroll { display: flex; gap: 24px; padding: 0 40px 60px; overflow-x: auto; scroll-snap-type: x mandatory; scroll-behavior: smooth; scrollbar-width: none; -webkit-overflow-scrolling: touch; }
.scene-scroll::-webkit-scrollbar { display: none; }
.scene-scroll-item { flex: 0 0 380px; scroll-snap-align: start; }
.scene-card { border-radius: 20px; overflow: hidden; border: 1px solid var(--border); background: var(--bg-card); transition: all 0.4s cubic-bezier(0.4,0,0.2,1); position: relative; }
.scene-card:hover { border-color: var(--border-glow); transform: translateY(-8px) scale(1.02); box-shadow: var(--shadow-lg); }
.scene-visual { width: 100%; height: 280px; overflow: hidden; position: relative; }
.scene-visual img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s; }
.scene-card:hover .scene-visual img { transform: scale(1.08); }
.scene-visual-overlay { position: absolute; inset: 0; background: linear-gradient(180deg, transparent 30%, rgba(0,0,0,0.8) 100%); display: flex; flex-direction: column; justify-content: flex-end; padding: 24px; transition: all 0.4s; }
.scene-card:hover .scene-visual-overlay { background: linear-gradient(180deg, transparent 20%, rgba(37,99,235,0.9) 100%); }
.scene-visual-icon { width: 56px; height: 56px; border-radius: 16px; background: var(--gradient); display: flex; align-items: center; justify-content: center; font-size: 28px; color: white; box-shadow: 0 4px 20px rgba(37,99,235,0.4); margin-bottom: 16px; transition: all 0.4s; }
.scene-card:hover .scene-visual-icon { transform: scale(1.1) rotate(-5deg); box-shadow: 0 6px 25px rgba(37,99,235,0.5); }
.scene-visual-title { font-size: 22px; font-weight: 700; color: white; margin-bottom: 8px; text-shadow: 0 2px 10px rgba(0,0,0,0.3); }
.scene-visual-desc { font-size: 14px; color: rgba(255,255,255,0.85); line-height: 1.6; opacity: 0; transform: translateY(10px); transition: all 0.4s ease; max-height: 0; }
.scene-card:hover .scene-visual-desc { opacity: 1; transform: translateY(0); max-height: 80px; margin-top: 8px; }
.scene-nums { display: flex; gap: 16px; margin-top: 12px; opacity: 0; transition: all 0.3s ease; }
.scene-card:hover .scene-nums { opacity: 1; }
.scene-num { text-align: center; }
.scene-num-v { font-size: 20px; font-weight: 800; color: #60a5fa; }
.scene-num-l { font-size: 11px; color: rgba(255,255,255,0.7); }

/* ===== 模型生态 ===== */
.models-section { padding: 100px 0; background: var(--bg-main); }
.models-intro { text-align: center; max-width: 800px; margin: 0 auto 40px; }
.models-intro p { font-size: 16px; color: var(--text-light); line-height: 1.8; }
.models-tabs { display: flex; justify-content: center; gap: 8px; margin-bottom: 40px; flex-wrap: wrap; }
.models-tab { padding: 8px 20px; border-radius: 50px; font-size: 14px; font-weight: 500; color: var(--text-muted); background: white; border: 1px solid var(--border); cursor: pointer; transition: all 0.3s; }
.models-tab:hover { border-color: var(--ac); color: var(--ac); }
.models-tab.active { background: var(--gradient); color: white; border-color: transparent; box-shadow: 0 4px 15px rgba(59,130,246,0.3); }
.models-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.model-card { background: white; border: 1px solid var(--border); border-radius: 16px; padding: 20px; text-align: center; transition: all 0.4s; cursor: pointer; position: relative; overflow: hidden; }
.model-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--gradient); opacity: 0; transition: opacity 0.3s; }
.model-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: var(--border-glow); }
.model-card:hover::before { opacity: 1; }
.model-logo { width: 56px; height: 56px; border-radius: 14px; margin: 0 auto 12px; display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 700; color: white; overflow: hidden; transition: transform 0.3s; }
.model-logo img { width: 36px; height: 36px; object-fit: contain; }
.model-card:hover .model-logo { transform: scale(1.1); }
.model-card h4 { font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 4px; }
.model-card p { font-size: 11px; color: var(--text-muted); }
.model-tag { position: absolute; top: 8px; right: 8px; padding: 2px 6px; border-radius: 4px; font-size: 9px; font-weight: 700; background: var(--gradient-soft); color: var(--ac); }
.model-tag.hot { background: rgba(239,68,68,0.1); color: #ef4444; }
.model-tag.new { background: rgba(16,185,129,0.1); color: #10b981; }
.model-tag.cn { background: rgba(59,130,246,0.1); color: #3b82f6; }
.model-card.featured { grid-column: span 2; display: flex; align-items: center; text-align: left; padding: 24px; background: var(--gradient); border: none; }
.model-card.featured::before { display: none; }
.model-card.featured .model-logo { width: 72px; height: 72px; margin: 0 20px 0 0; border-radius: 18px; background: rgba(255,255,255,0.2); font-size: 32px; }
.model-card.featured .model-logo i { color: white; }
.model-card.featured h4 { font-size: 18px; color: white; margin-bottom: 6px; }
.model-card.featured p { font-size: 13px; color: rgba(255,255,255,0.9); }
.model-card.featured:hover { transform: translateY(-8px); box-shadow: 0 12px 40px rgba(59,130,246,0.4); }
.models-stats { display: flex; justify-content: center; gap: 48px; margin-top: 48px; padding-top: 32px; border-top: 1px solid var(--border); }
.models-stat { text-align: center; }
.models-stat-num { font-size: 36px; font-weight: 900; background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.models-stat-label { font-size: 13px; color: var(--text-muted); margin-top: 4px; }

/* Logo背景 */
.logo-openai { background: linear-gradient(135deg, #74aa9c, #10a37f); }
.logo-anthropic { background: linear-gradient(135deg, #d4a574, #c9a87c); }
.logo-google { background: linear-gradient(135deg, #4285f4, #34a853); }
.logo-meta { background: linear-gradient(135deg, #0668e1, #1877f2); }
.logo-mistral { background: linear-gradient(135deg, #ff7000, #ff5000); }
.logo-alibaba { background: linear-gradient(135deg, #ff6a00, #ff4500); }
.logo-baidu { background: linear-gradient(135deg, #2932e1, #1a1ad1); }
.logo-zhipu { background: linear-gradient(135deg, #6366f1, #4f46e5); }
.logo-deepseek { background: linear-gradient(135deg, #0ea5e9, #0284c7); }
.logo-doubao { background: linear-gradient(135deg, #fe2c55, #ff3366); }
.logo-kimi { background: linear-gradient(135deg, #7c3aed, #6d28d9); }
.logo-xunfei { background: linear-gradient(135deg, #00a0e9, #0080d0); }
.logo-baichuan { background: linear-gradient(135deg, #3b82f6, #2563eb); }
.logo-minimax { background: linear-gradient(135deg, #8b5cf6, #7c3aed); }
.logo-yi { background: linear-gradient(135deg, #10b981, #059669); }
.logo-tencent { background: linear-gradient(135deg, #07c160, #06ad56); }
.logo-huawei { background: linear-gradient(135deg, #c7000b, #a00009); }
.logo-moonshot { background: linear-gradient(135deg, #6366f1, #8b5cf6); }

/* ===== 技术栈 ===== */
.tech-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.tech-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 20px; padding: 28px; transition: all 0.4s; }
.tech-card:hover { border-color: var(--border-glow); transform: translateY(-4px); }
.tech-card h4 { font-size: 15px; font-weight: 700; color: var(--text); margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }
.tech-card h4 i { color: var(--ac); font-size: 20px; }
.tech-list { display: flex; flex-wrap: wrap; gap: 8px; }
.tech-item { padding: 5px 12px; border-radius: 50px; font-size: 12px; background: var(--gradient-soft); color: var(--ac-dark); border: 1px solid rgba(59,130,246,0.15); transition: all 0.3s; }
.tech-item:hover { background: rgba(59,130,246,0.15); }

/* ===== 客户案例 ===== */
.case-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 20px; overflow: hidden; transition: all 0.4s; }
.case-card:hover { border-color: var(--border-glow); transform: translateY(-5px); }
.case-img { height: 160px; overflow: hidden; position: relative; }
.case-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.case-card:hover .case-img img { transform: scale(1.05); }
.case-tag { position: absolute; top: 12px; left: 12px; padding: 4px 12px; border-radius: 50px; background: var(--gradient); color: white; font-size: 11px; font-weight: 700; }
.case-body { padding: 20px 24px 24px; }
.case-body h4 { font-size: 16px; font-weight: 700; color: var(--text); margin-bottom: 8px; }
.case-body p { font-size: 13px; color: var(--text-light); line-height: 1.7; margin-bottom: 12px; }
.case-result { display: flex; gap: 8px; }
.case-badge { padding: 4px 10px; border-radius: 50px; font-size: 11px; background: rgba(16,185,129,0.1); color: var(--gn); border: 1px solid rgba(16,185,129,0.2); font-weight: 500; }

/* ===== 产品矩阵 ===== */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.product-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 24px; padding: 32px; transition: all 0.4s; position: relative; overflow: hidden; }
.product-card::after { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--gradient); transform: scaleX(0); transition: transform 0.4s; }
.product-card:hover { border-color: var(--border-glow); transform: translateY(-6px); box-shadow: var(--shadow-md); }
.product-card:hover::after { transform: scaleX(1); }
.product-icon { width: 64px; height: 64px; border-radius: 20px; margin-bottom: 16px; display: flex; align-items: center; justify-content: center; font-size: 32px; color: white; transition: transform 0.3s; }
.product-card:hover .product-icon { transform: scale(1.1); }
.product-card h3 { font-size: 18px; font-weight: 700; color: var(--text); margin-bottom: 8px; }
.product-card > p { font-size: 13px; color: var(--text-light); margin-bottom: 20px; line-height: 1.8; }
.product-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 20px; }
.product-tag { padding: 4px 12px; border-radius: 50px; font-size: 12px; background: var(--gradient-soft); color: var(--ac-dark); border: 1px solid rgba(59,130,246,0.15); }
.product-link { display: inline-flex; align-items: center; gap: 6px; color: var(--ac); font-size: 14px; font-weight: 600; transition: gap 0.3s; }
.product-link:hover { gap: 10px; }

/* ===== 优势 ===== */
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.adv-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px; padding: 24px; text-align: center; transition: all 0.4s; }
.adv-card:hover { border-color: var(--border-glow); transform: translateY(-4px); }
.adv-icon { width: 56px; height: 56px; border-radius: 16px; margin: 0 auto 12px; display: flex; align-items: center; justify-content: center; font-size: 28px; color: white; transition: transform 0.3s; }
.adv-card:hover .adv-icon { transform: scale(1.15); }
.adv-card h3 { font-size: 15px; font-weight: 700; color: var(--text); margin-bottom: 6px; }
.adv-card p { font-size: 12px; color: var(--text-muted); }

/* ===== 流程 ===== */
.process-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; align-items: start; }
.process-step { text-align: center; }
.process-circle { width: 70px; height: 70px; border-radius: 20px; margin: 0 auto 16px; background: var(--gradient-soft); border: 2px solid rgba(59,130,246,0.2); display: flex; align-items: center; justify-content: center; font-size: 28px; color: var(--ac); transition: all 0.4s; }
.process-step:hover .process-circle { background: var(--gradient); color: white; border-color: transparent; transform: scale(1.1); }
.process-num { font-size: 11px; font-weight: 800; color: var(--ac); letter-spacing: 1px; margin-bottom: 6px; }
.process-step h4 { font-size: 14px; font-weight: 700; color: var(--text); margin-bottom: 4px; }
.process-step p { font-size: 12px; color: var(--text-muted); }
.process-arrow { text-align: center; padding-top: 25px; color: rgba(59,130,246,0.3); font-size: 20px; }

/* ===== CTA ===== */
.cta { padding: 100px 0; background: linear-gradient(180deg, var(--bg-alt) 0%, #bfdbfe 50%, #93c5fd 100%); text-align: center; position: relative; overflow: hidden; }
.cta::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, rgba(59,130,246,0.5), transparent); }
.cta h2 { font-size: 44px; font-weight: 900; color: var(--text); margin-bottom: 16px; }
.cta p { font-size: 18px; color: var(--text-light); margin-bottom: 40px; }
.cta-btns { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.cta-btn-primary { display: inline-flex; align-items: center; gap: 10px; padding: 16px 36px; border-radius: 50px; background: var(--gradient); color: white; font-size: 16px; font-weight: 700; transition: all 0.3s; box-shadow: 0 4px 25px rgba(59,130,246,0.4); }
.cta-btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 35px rgba(59,130,246,0.5); }
.cta-btn-secondary { display: inline-flex; align-items: center; gap: 10px; padding: 16px 36px; border-radius: 50px; background: white; border: 1px solid var(--border); color: var(--text); font-size: 16px; font-weight: 500; transition: all 0.3s; }
.cta-btn-secondary:hover { border-color: var(--ac); color: var(--ac); }

/* ===== Footer ===== */
.footer { padding: 60px 0 0; border-top: 1px solid var(--border); background: var(--bg-main); }
.ft-grid { max-width: 1200px; margin: 0 auto; padding: 0 40px; display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 48px; }
.ft-brand img { height: 40px; margin-bottom: 16px; }
.ft-brand p { font-size: 13px; color: var(--text-muted); line-height: 1.8; }
.ft-col h4 { font-size: 14px; font-weight: 700; color: var(--text); margin-bottom: 16px; }
.ft-col ul { list-style: none; }
.ft-col li { margin-bottom: 10px; }
.ft-col a { font-size: 13px; color: var(--text-muted); transition: color 0.3s; }
.ft-col a:hover { color: var(--ac); }
.ft-bottom { max-width: 1200px; margin: 40px auto 0; padding: 20px 40px; border-top: 1px solid var(--border); text-align: center; font-size: 13px; color: var(--text-muted); }

/* ===== 进度条 ===== */
.progress-bar { position: fixed; top: 0; left: 0; height: 3px; background: var(--gradient); z-index: 9999; transition: width 0.1s; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .container, .banner-cnt, .ft-grid { padding: 0 24px; }
  .banner-cnt { grid-template-columns: 1fr; text-align: center; }
  .banner-left { order: 2; }
  .banner-right { order: 1; max-width: 600px; margin: 0 auto; }
  .banner-title { font-size: 42px; }
  .ability-grid, .demo-grid { grid-template-columns: repeat(2, 1fr); }
  .tech-grid { grid-template-columns: repeat(2, 1fr); }
  .case-cards, .product-grid { grid-template-columns: repeat(2, 1fr); }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(3, 1fr); }
  .process-arrow { display: none; }
  .ft-grid { grid-template-columns: 1fr 1fr; }
  .section-title { font-size: 32px; }
  .models-grid { grid-template-columns: repeat(4, 1fr); }
  .agent-content.active { grid-template-columns: 1fr; }
  .agent-visual { order: -1; }
}
@media (max-width: 768px) {
  .nav { padding: 0 20px; }
  .nav-links, .nav-cta { display: none; }
  .nav-mb { display: block; }
  .nav-links.open { display: flex; flex-direction: column; position: fixed; top: 70px; left: 0; right: 0; background: rgba(240,249,255,0.98); padding: 24px 20px; gap: 20px; border-bottom: 1px solid var(--border); }
  .container, .banner-cnt, .ft-grid { padding: 0 16px; }
  .banner-title { font-size: 30px; }
  .ability-grid, .demo-grid, .tech-grid, .adv-grid { grid-template-columns: 1fr; }
  .case-cards, .product-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .ft-grid { grid-template-columns: 1fr; }
  .cta h2 { font-size: 28px; }
  .section-title { font-size: 26px; }
  .models-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .model-card { padding: 16px; }
  .model-logo { width: 48px; height: 48px; }
  .model-card.featured { grid-column: span 2; }
  .scene-scroll-item { flex: 0 0 320px; }
}
@media (max-width: 480px) {
  .scene-scroll-item { flex: 0 0 280px; }
}
.scene-body{
    padding: 50px;
}