/* ============================================
   AI应用超市 - 企业官网样式系统
   主色调：科技蓝 #0066FF
   ============================================ */

:root {
  --primary: #0066FF;
  --primary-dark: #0040C9;
  --primary-light: #E8F1FF;
  --primary-gradient: linear-gradient(135deg, #0066FF 0%, #0040C9 100%);
  --primary-gradient-soft: linear-gradient(135deg, #E8F1FF 0%, #F0F6FF 100%);

  --bg-white: #FFFFFF;
  --bg-light: #F5F7FA;
  --bg-lighter: #FAFBFC;
  --bg-dark: #0A1628;

  --text-primary: #1A1A1A;
  --text-secondary: #555555;
  --text-tertiary: #999999;
  --text-white: #FFFFFF;

  --border: #E8E8E8;
  --border-light: #F0F0F0;

  --danger: #FF4D4F;
  --success: #52C41A;
  --warning: #FAAD14;

  --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 48px rgba(0,0,0,0.12);
  --shadow-blue: 0 4px 20px rgba(0,102,255,0.15);
  --shadow-blue-lg: 0 8px 32px rgba(0,102,255,0.25);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --header-h: 68px;
  --max-w: 1200px;
  --t: all 0.3s cubic-bezier(0.4,0,0.2,1);
  --t-fast: all 0.15s ease;
}

* { margin:0; padding:0; box-sizing:border-box; }

html { scroll-behavior:smooth; scroll-padding-top:var(--header-h); }

body {
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei","Helvetica Neue",sans-serif;
  font-size:16px; line-height:1.7; color:var(--text-primary); background:var(--bg-white); overflow-x:hidden;
}

a { text-decoration:none; color:inherit; transition:var(--t-fast); }
img { max-width:100%; display:block; }
ul,ol { list-style:none; }
button { cursor:pointer; font-family:inherit; border:none; }

.container { max-width:var(--max-w); margin:0 auto; padding:0 24px; }

/* ===== Navbar ===== */
.navbar {
  position:fixed; top:0; left:0; right:0; height:var(--header-h);
  background:rgba(255,255,255,0.92); backdrop-filter:blur(16px); -webkit-backdrop-filter:blur(16px);
  box-shadow:var(--shadow-sm); z-index:1000; transition:var(--t);
}
.navbar.scrolled { box-shadow:0 2px 20px rgba(0,0,0,0.08); }
.navbar .container { height:100%; display:flex; align-items:center; justify-content:space-between; }

.nav-logo { display:flex; align-items:center; gap:10px; font-size:19px; font-weight:800; color:var(--primary-dark); }
.nav-logo .logo-icon {
  width:38px; height:38px; border-radius:10px; overflow:hidden;
  display:flex; align-items:center; justify-content:center; flex-shrink:0;
  box-shadow:0 2px 8px rgba(0,102,255,0.15);
}
.nav-logo .logo-icon img { width:100%; height:100%; object-fit:cover; display:block; }
.nav-logo .logo-text span { color:var(--primary); }

.nav-menu { display:flex; align-items:center; gap:4px; }
.nav-menu > li > a {
  display:flex; align-items:center; padding:8px 18px; font-size:15px; font-weight:500;
  color:var(--text-secondary); border-radius:var(--radius-sm); transition:var(--t-fast); position:relative;
}
.nav-menu > li > a:hover, .nav-menu > li > a.active { color:var(--primary); background:var(--primary-light); }
.nav-menu > li > a.active::after {
  content:''; position:absolute; bottom:-4px; left:50%; transform:translateX(-50%);
  width:24px; height:3px; background:var(--primary); border-radius:2px;
}
.nav-cta {
  margin-left:12px; padding:8px 22px !important; background:var(--primary-gradient) !important;
  color:white !important; border-radius:var(--radius-sm) !important; font-weight:600 !important; box-shadow:var(--shadow-blue);
}
.nav-cta:hover { transform:translateY(-1px); box-shadow:var(--shadow-blue-lg) !important; }

.nav-toggle { display:none; flex-direction:column; gap:5px; cursor:pointer; padding:6px; background:none; }
.nav-toggle span { width:24px; height:2px; background:var(--text-primary); border-radius:2px; transition:var(--t); }
.nav-toggle.active span:nth-child(1) { transform:rotate(45deg) translate(5px,5px); }
.nav-toggle.active span:nth-child(2) { opacity:0; }
.nav-toggle.active span:nth-child(3) { transform:rotate(-45deg) translate(5px,-5px); }

/* ===== Hero ===== */
.hero {
  position:relative; min-height:100vh; display:flex; align-items:center;
  padding-top:var(--header-h); background:var(--bg-white); overflow:hidden;
}
.hero-bg { position:absolute; top:0; left:0; right:0; bottom:0; z-index:0; }
.hero-grid {
  position:absolute; inset:0;
  background-image:linear-gradient(rgba(0,102,255,0.04) 1px,transparent 1px),linear-gradient(90deg,rgba(0,102,255,0.04) 1px,transparent 1px);
  background-size:48px 48px;
  mask-image:radial-gradient(ellipse at center,black 0%,transparent 70%);
  -webkit-mask-image:radial-gradient(ellipse at center,black 0%,transparent 70%);
}
.hero-orb { position:absolute; border-radius:50%; filter:blur(60px); opacity:0.5; animation:floatOrb 8s ease-in-out infinite; }
.hero-orb-1 { width:400px; height:400px; background:radial-gradient(circle,rgba(0,102,255,0.25),transparent); top:-80px; right:-40px; }
.hero-orb-2 { width:320px; height:320px; background:radial-gradient(circle,rgba(0,64,201,0.2),transparent); bottom:-60px; left:-60px; animation-delay:2s; }
.hero-orb-3 { width:220px; height:220px; background:radial-gradient(circle,rgba(82,196,250,0.25),transparent); top:35%; left:28%; animation-delay:4s; }
@keyframes floatOrb {
  0%,100%{transform:translate(0,0) scale(1);}
  33%{transform:translate(30px,-30px) scale(1.1);}
  66%{transform:translate(-20px,20px) scale(0.95);}
}
.hero .container { position:relative; z-index:1; display:grid; grid-template-columns:1fr 1fr; gap:60px; align-items:center; width:100%; }
.hero-content { animation:fadeInUp 0.8s ease; }
.hero-badge {
  display:inline-flex; align-items:center; gap:8px; padding:6px 16px;
  background:var(--primary-light); border:1px solid rgba(0,102,255,0.15); border-radius:20px;
  font-size:13px; font-weight:600; color:var(--primary-dark); margin-bottom:24px;
}
.hero-badge .dot { width:8px; height:8px; background:var(--primary); border-radius:50%; animation:pulse 2s infinite; }
@keyframes pulse {
  0%,100%{opacity:1;box-shadow:0 0 0 0 rgba(0,102,255,0.4);}
  50%{opacity:0.8;box-shadow:0 0 0 8px rgba(0,102,255,0);}
}
.hero-title { font-size:52px; font-weight:800; line-height:1.15; color:var(--text-primary); margin-bottom:20px; letter-spacing:-1px; }
.hero-title .grad { background:var(--primary-gradient); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.hero-desc { font-size:17px; color:var(--text-secondary); line-height:1.8; margin-bottom:32px; max-width:500px; }
.hero-actions { display:flex; gap:16px; flex-wrap:wrap; }
.hero-stats { display:flex; gap:40px; margin-top:48px; padding-top:32px; border-top:1px solid var(--border-light); }
.hero-stat-num { font-size:32px; font-weight:800; color:var(--primary); line-height:1; }
.hero-stat-label { font-size:13px; color:var(--text-tertiary); margin-top:6px; }
.hero-visual { position:relative; height:480px; animation:fadeInRight 0.8s ease; }
@keyframes fadeInUp { from{opacity:0;transform:translateY(30px);} to{opacity:1;transform:translateY(0);} }
@keyframes fadeInRight { from{opacity:0;transform:translateX(30px);} to{opacity:1;transform:translateX(0);} }

.hero-card-grid { display:grid; grid-template-columns:1fr 1fr; gap:16px; height:100%; }
.hero-card {
  background:white; border-radius:var(--radius-lg); padding:24px; box-shadow:var(--shadow-md);
  border:1px solid var(--border-light); transition:var(--t); display:flex; flex-direction:column; justify-content:space-between;
}
.hero-card:hover { transform:translateY(-4px); box-shadow:var(--shadow-blue-lg); border-color:var(--primary-light); }
.hero-card.featured { grid-row:span 2; background:var(--primary-gradient); color:white; }
.hero-card.featured .hc-icon { background:rgba(255,255,255,0.2); overflow:hidden; }
.hero-card.featured .hc-title { color:white; }
.hero-card.featured .hc-desc { color:rgba(255,255,255,0.85); }
.hero-card.featured .hc-value { color:white; }
.hc-icon { width:44px; height:44px; background:white; border-radius:12px; display:flex; align-items:center; justify-content:center; margin-bottom:16px; overflow:hidden; box-shadow:0 2px 8px rgba(0,102,255,0.1); }
.hc-icon img { width:100%; height:100%; object-fit:cover; }
.hc-title { font-size:16px; font-weight:700; margin-bottom:6px; color:var(--text-primary); }
.hc-desc { font-size:13px; color:var(--text-tertiary); line-height:1.6; }
.hc-value { font-size:28px; font-weight:800; color:var(--primary); margin-top:12px; }

/* Hero卡片内嵌列表（featured大卡片） */
.hc-list { list-style:none; padding:0; margin:14px 0 0 0; display:grid; grid-template-columns:1fr; gap:8px 0; }
.hc-list li { font-size:12px; color:rgba(255,255,255,0.95); display:flex; align-items:center; gap:6px; line-height:1.5; }
.hc-list li .hc-num { background:rgba(255,255,255,0.25); color:white; min-width:18px; height:18px; border-radius:50%; display:inline-flex; align-items:center; justify-content:center; font-size:11px; font-weight:700; }

/* Hero卡片内嵌6宫格 */
.hc-grid-6 { display:grid; grid-template-columns:1fr 1fr 1fr; gap:6px; margin-top:12px; }
.hc-grid-6 .grid-item { background:var(--primary-light); color:var(--primary); font-size:12px; font-weight:600; padding:7px 4px; border-radius:8px; text-align:center; line-height:1.3; }

/* Hero卡片内嵌4宫格 */
.hc-grid-4 { display:grid; grid-template-columns:1fr 1fr; gap:8px; margin-top:14px; }
.hc-grid-4 .grid-item { background:var(--primary-light); color:var(--primary); font-size:13px; font-weight:600; padding:10px 8px; border-radius:8px; text-align:center; }

/* ===== Sections ===== */
.section { padding:80px 0; }
.section-light { background:var(--bg-light); }
.section-white { background:var(--bg-white); }
.section-dark { background:var(--bg-dark); color:rgba(255,255,255,0.85); }
.section-header { text-align:center; margin-bottom:56px; }
.section-tag {
  display:inline-block; padding:4px 16px; background:var(--primary-light); color:var(--primary);
  font-size:13px; font-weight:600; border-radius:20px; margin-bottom:16px; letter-spacing:0.5px;
}
.section-title { font-size:36px; font-weight:800; color:var(--text-primary); margin-bottom:12px; line-height:1.3; }
.section-title .accent { color:var(--primary); }
.section-subtitle { font-size:16px; color:var(--text-tertiary); max-width:600px; margin:0 auto; }

/* ===== Buttons ===== */
.btn {
  display:inline-flex; align-items:center; gap:8px; padding:12px 28px; font-size:15px; font-weight:600;
  border-radius:var(--radius-sm); cursor:pointer; transition:var(--t); font-family:inherit;
}
.btn-primary { background:var(--primary-gradient); color:white; box-shadow:var(--shadow-blue); }
.btn-primary:hover { transform:translateY(-2px); box-shadow:var(--shadow-blue-lg); }
.btn-outline { background:transparent; color:var(--primary); border:2px solid var(--primary); }
.btn-outline:hover { background:var(--primary); color:white; }
.btn-white { background:white; color:var(--primary); }
.btn-white:hover { transform:translateY(-2px); box-shadow:var(--shadow-md); }
.btn-lg { padding:14px 36px; font-size:16px; }

/* ===== Cards ===== */
.card-grid { display:grid; gap:24px; }
.card-grid-2 { grid-template-columns:repeat(2,1fr); }
.card-grid-3 { grid-template-columns:repeat(3,1fr); }
.card-grid-4 { grid-template-columns:repeat(4,1fr); }

/* Feature Card */
.feature-card {
  background:white; border-radius:var(--radius-lg); padding:36px 28px;
  border:1px solid var(--border-light); transition:var(--t); position:relative; overflow:hidden;
}
.feature-card::before {
  content:''; position:absolute; top:0; left:0; right:0; height:3px;
  background:var(--primary-gradient); transform:scaleX(0); transform-origin:left; transition:transform 0.4s ease;
}
.feature-card:hover { transform:translateY(-6px); box-shadow:var(--shadow-md); border-color:transparent; }
.feature-card:hover::before { transform:scaleX(1); }
.feature-icon {
  width:56px; height:56px; background:var(--primary-light); border-radius:14px;
  display:flex; align-items:center; justify-content:center; margin-bottom:20px; transition:var(--t);
}
.feature-card:hover .feature-icon { background:var(--primary-gradient); transform:scale(1.05); }
.feature-icon svg { width:28px; height:28px; fill:var(--primary); transition:var(--t); }
.feature-card:hover .feature-icon svg { fill:white; }
.feature-title { font-size:18px; font-weight:700; margin-bottom:10px; color:var(--text-primary); }
.feature-desc { font-size:14px; color:var(--text-tertiary); line-height:1.7; }

/* Pain Point Card (numbered) */
.pain-card {
  background:white; border-radius:var(--radius-lg); padding:36px 28px;
  border:1px solid var(--border-light); transition:var(--t); position:relative; overflow:hidden;
}
.pain-card:hover { transform:translateY(-6px); box-shadow:var(--shadow-md); border-color:var(--primary-light); }
.pain-card-num {
  font-size:48px; font-weight:800; color:var(--primary-light); line-height:1; margin-bottom:16px;
  position:absolute; top:20px; right:24px; transition:var(--t);
}
.pain-card:hover .pain-card-num { color:var(--primary); opacity:0.15; }
.pain-card-label { font-size:13px; font-weight:700; color:var(--primary); margin-bottom:8px; letter-spacing:0.5px; }
.pain-card-title { font-size:20px; font-weight:700; margin-bottom:12px; color:var(--text-primary); }
.pain-card-desc { font-size:14px; color:var(--text-tertiary); line-height:1.7; }

/* ===== Business Model ===== */
.model-showcase { display:grid; grid-template-columns:1fr 1fr; gap:48px; align-items:center; }
.model-visual { position:relative; }
.model-diagram { background:var(--primary-gradient-soft); border-radius:var(--radius-xl); padding:40px; position:relative; overflow:hidden; }
.model-center { text-align:center; position:relative; z-index:2; }
.model-center-icon {
  width:80px; height:80px; margin:0 auto 16px; background:white;
  border-radius:20px; display:flex; align-items:center; justify-content:center; box-shadow:var(--shadow-blue-lg);
  overflow:hidden;
}
.model-center-icon img { width:100%; height:100%; object-fit:cover; }
.model-center h4 { font-size:20px; font-weight:700; color:var(--text-primary); }
.model-center p { font-size:13px; color:var(--text-tertiary); margin-top:4px; }
.model-ring { display:grid; grid-template-columns:repeat(5, 1fr); gap:8px; margin-top:32px; }
.model-ring-item {
  background:white; border:1px solid var(--border-light); border-radius:8px; padding:14px 4px;
  text-align:center; transition:var(--t);
}
.model-ring-item:hover { transform:translateY(-3px); box-shadow:var(--shadow-blue); }
.model-ring-item svg { display:none; }
.model-ring-item span { display:block; font-size:12px; font-weight:600; color:var(--primary); line-height:1.4; }

/* ===== Tool Grid (应用场景) ===== */
.tool-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:20px; }
.tool-card {
  background:white; border-radius:var(--radius-lg); overflow:hidden;
  border:1px solid var(--border-light); transition:var(--t); display:flex; flex-direction:column;
}
.tool-card:hover { transform:translateY(-6px); box-shadow:var(--shadow-lg); }
.tool-img {
  height:160px; display:flex; align-items:center; justify-content:center; position:relative; overflow:hidden;
}
.tool-card:nth-child(1) .tool-img { background:linear-gradient(135deg,#E8F1FF,#F0F6FF); }
.tool-card:nth-child(2) .tool-img { background:linear-gradient(135deg,#FFF3E0,#FFF8E1); }
.tool-card:nth-child(3) .tool-img { background:linear-gradient(135deg,#F3E8FF,#F9F0FF); }
.tool-card:nth-child(4) .tool-img { background:linear-gradient(135deg,#E0F7FA,#E6FFFB); }
.tool-card:nth-child(5) .tool-img { background:linear-gradient(135deg,#F1F8E9,#F5FFF0); }
.tool-card:nth-child(6) .tool-img { background:linear-gradient(135deg,#FCE4EC,#FFF0F5); }
.tool-img svg { width:56px; height:56px; fill:var(--primary); opacity:0.7; }
.tool-card:nth-child(2) .tool-img svg { fill:#FF9800; }
.tool-card:nth-child(3) .tool-img svg { fill:#7B61FF; }
.tool-card:nth-child(4) .tool-img svg { fill:#13C2C2; }
.tool-card:nth-child(5) .tool-img svg { fill:#52C41A; }
.tool-card:nth-child(6) .tool-img svg { fill:#EB4899; }
.tool-body { padding:24px; flex:1; display:flex; flex-direction:column; }
.tool-title { font-size:17px; font-weight:700; margin-bottom:8px; color:var(--text-primary); }
.tool-desc { font-size:14px; color:var(--text-tertiary); line-height:1.7; margin-bottom:16px; flex:1; }
.tool-link {
  display:inline-flex; align-items:center; gap:6px; font-size:14px; font-weight:600; color:var(--primary);
  transition:var(--t-fast); align-self:flex-start;
}
.tool-link:hover { gap:10px; }
.tool-link svg { width:16px; height:16px; fill:var(--primary); }
.tool-tags { display:flex; flex-wrap:wrap; gap:6px; margin-bottom:16px; }
.tool-tag { font-size:12px; padding:3px 10px; background:var(--bg-light); border-radius:4px; color:var(--text-secondary); }

/* ===== Stats Bar ===== */
.stats-bar { display:grid; grid-template-columns:repeat(4,1fr); gap:24px; }
.stat-item { text-align:center; padding:32px 20px; background:white; border-radius:var(--radius-lg); border:1px solid var(--border-light); transition:var(--t); }
.stat-item:hover { border-color:var(--primary); box-shadow:var(--shadow-blue); transform:translateY(-4px); }
.stat-num { font-size:40px; font-weight:800; color:var(--primary); line-height:1; }
.stat-suffix { font-size:20px; }
.stat-label { font-size:14px; color:var(--text-tertiary); margin-top:10px; }

/* ===== Contact ===== */
.contact-grid { display:grid; grid-template-columns:1fr 1.2fr; gap:40px; }
.contact-info-card {
  background:var(--primary-gradient); border-radius:var(--radius-lg); padding:40px 32px;
  color:white; position:relative; overflow:hidden;
}
.contact-info-card::before {
  content:''; position:absolute; top:-50%; right:-30%; width:300px; height:300px;
  background:radial-gradient(circle,rgba(255,255,255,0.1),transparent); border-radius:50%;
}
.contact-info-card h3 { font-size:22px; font-weight:700; margin-bottom:8px; position:relative; }
.contact-info-card > p { font-size:14px; opacity:0.85; margin-bottom:32px; position:relative; }
.contact-info-list { position:relative; }
.contact-info-item { display:flex; gap:16px; margin-bottom:28px; align-items:flex-start; }
.contact-info-icon {
  flex-shrink:0; width:44px; height:44px; background:rgba(255,255,255,0.15);
  border-radius:12px; display:flex; align-items:center; justify-content:center;
}
.contact-info-icon svg { width:22px; height:22px; fill:white; }
.contact-info-label { font-size:12px; opacity:0.7; margin-bottom:4px; }
.contact-info-value { font-size:15px; font-weight:600; line-height:1.5; }

.contact-form-card {
  background:white; border-radius:var(--radius-lg); padding:40px 32px;
  box-shadow:var(--shadow-md); border:1px solid var(--border-light);
}
.contact-form-card h3 { font-size:22px; font-weight:700; margin-bottom:8px; }
.contact-form-card > p { font-size:14px; color:var(--text-tertiary); margin-bottom:28px; }
.form-group { margin-bottom:20px; }
.form-row { display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.form-label { display:block; font-size:14px; font-weight:600; color:var(--text-primary); margin-bottom:8px; }
.form-label .required { color:var(--danger); }
.form-input, .form-textarea {
  width:100%; padding:12px 16px; font-size:14px; font-family:inherit;
  border:2px solid var(--border); border-radius:var(--radius-sm); background:var(--bg-lighter);
  transition:var(--t-fast); color:var(--text-primary); outline:none;
}
.form-input:focus, .form-textarea:focus { border-color:var(--primary); background:white; box-shadow:0 0 0 3px rgba(0,102,255,0.1); }
.form-input::placeholder, .form-textarea::placeholder { color:#BBB; }
.form-textarea { resize:vertical; min-height:120px; }
.form-error { display:none; font-size:12px; color:var(--danger); margin-top:6px; align-items:center; gap:4px; }
.form-error.show { display:flex; }
.form-input.error, .form-textarea.error { border-color:var(--danger); background:#FFF5F5; }
.form-success-msg {
  display:none; padding:16px 20px; background:#F0FFF0; border:1px solid #B7EB8F;
  border-radius:var(--radius-sm); color:var(--success); font-size:14px; margin-bottom:20px;
  align-items:center; gap:8px;
}
.form-success-msg.show { display:flex; }

/* Map */
.map-container {
  border-radius:var(--radius-lg); overflow:hidden; box-shadow:var(--shadow-md);
  border:1px solid var(--border-light); background:linear-gradient(135deg,#F0F6FF,#E8F1FF); height:360px; position:relative;
}
.map-placeholder {
  width:100%; height:100%; display:flex; align-items:center; justify-content:center;
  flex-direction:column; gap:12px;
}
.map-placeholder svg { width:56px; height:56px; fill:var(--primary); }
.map-placeholder p { font-size:14px; color:var(--text-tertiary); }
.map-pin {
  position:absolute; top:38%; left:50%; transform:translate(-50%,-100%);
  display:flex; flex-direction:column; align-items:center; z-index:2;
}
.map-pin-icon {
  width:36px; height:36px; background:var(--primary); border-radius:50% 50% 50% 0;
  transform:rotate(-45deg); box-shadow:0 4px 12px rgba(0,102,255,0.4);
  display:flex; align-items:center; justify-content:center; animation:pinBounce 2s infinite;
}
.map-pin-icon svg { width:18px; height:18px; fill:white; transform:rotate(45deg); }
@keyframes pinBounce { 0%,100%{transform:rotate(-45deg) translateY(0);} 50%{transform:rotate(-45deg) translateY(-10px);} }
.map-pin-label {
  margin-top:8px; padding:6px 14px; background:white; border-radius:var(--radius-sm);
  box-shadow:var(--shadow-md); font-size:13px; font-weight:600; color:var(--text-primary); white-space:nowrap;
}

/* ===== CTA ===== */
.cta-section { padding:80px 0; background:var(--primary-gradient); position:relative; overflow:hidden; }
.cta-section::before {
  content:''; position:absolute; inset:0;
  background-image:radial-gradient(circle at 20% 50%,rgba(255,255,255,0.1),transparent 40%),radial-gradient(circle at 80% 80%,rgba(255,255,255,0.08),transparent 40%);
}
.cta-content { position:relative; text-align:center; color:white; }
.cta-title { font-size:36px; font-weight:800; margin-bottom:16px; }
.cta-desc { font-size:16px; opacity:0.9; margin-bottom:32px; max-width:500px; margin-left:auto; margin-right:auto; }

/* ===== Footer ===== */
.footer { background:var(--bg-dark); color:rgba(255,255,255,0.65); padding:64px 0 24px; }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:40px; margin-bottom:40px; }
.footer-brand .nav-logo { color:white; margin-bottom:16px; }
.footer-brand .nav-logo .logo-text { color:white; }
.footer-brand .nav-logo .logo-text span { color:var(--primary); }
.footer-brand p { font-size:14px; line-height:1.8; margin-bottom:20px; max-width:300px; }
.footer-social { display:flex; gap:12px; }
.footer-social a { width:36px; height:36px; background:rgba(255,255,255,0.1); border-radius:50%; display:flex; align-items:center; justify-content:center; transition:var(--t-fast); }
.footer-social a:hover { background:var(--primary); transform:translateY(-2px); }
.footer-social svg { width:18px; height:18px; fill:white; }
.footer-col h4 { font-size:15px; font-weight:600; color:white; margin-bottom:16px; }
.footer-col ul li { margin-bottom:10px; }
.footer-col ul li a { font-size:14px; color:rgba(255,255,255,0.55); transition:var(--t-fast); }
.footer-col ul li a:hover { color:var(--primary); padding-left:4px; }
.footer-qr { display:flex; flex-direction:column; align-items:flex-start; }
.footer-qr img {
  width:80px; height:80px;
  background:white; padding:4px; border-radius:5px;
  display:block;
  box-shadow:0 4px 12px rgba(0,0,0,0.25);
}
.footer-qr p { margin-top:10px; font-size:12px; color:rgba(255,255,255,0.55); line-height:1.6; }
.footer-bottom { border-top:1px solid rgba(255,255,255,0.1); padding-top:24px; text-align:center; font-size:13px; color:rgba(255,255,255,0.35); }

/* ===== Reveal Animation ===== */
.reveal { opacity:0; transform:translateY(30px); transition:opacity 0.6s ease, transform 0.6s ease; }
.reveal.active { opacity:1; transform:translateY(0); }
.reveal-d1 { transition-delay:0.1s; }
.reveal-d2 { transition-delay:0.2s; }
.reveal-d3 { transition-delay:0.3s; }

/* ===== Responsive ===== */
@media (max-width:1024px) {
  .hero-title { font-size:42px; }
  .section-title { font-size:30px; }
  .footer-grid { grid-template-columns:2fr 1fr 1fr; }
}
@media (max-width:768px) {
  :root { --header-h:60px; }
  .container { padding:0 16px; }
  .nav-menu {
    position:fixed; top:var(--header-h); left:0; right:0; flex-direction:column;
    background:white; padding:16px; gap:4px; box-shadow:var(--shadow-md);
    transform:translateY(-100%); opacity:0; visibility:hidden; transition:var(--t);
    max-height:calc(100vh - var(--header-h)); overflow-y:auto;
  }
  .nav-menu.active { transform:translateY(0); opacity:1; visibility:visible; }
  .nav-menu > li { width:100%; }
  .nav-menu > li > a { width:100%; padding:12px 16px; }
  .nav-cta { margin-left:0; margin-top:8px; text-align:center; }
  .nav-toggle { display:flex; }
  .hero { min-height:auto; padding-top:calc(var(--header-h) + 40px); padding-bottom:60px; }
  .hero .container { grid-template-columns:1fr; gap:40px; }
  .hero-title { font-size:30px; }
  .hero-desc { font-size:15px; }
  .hero-visual { height:340px; }
  .hero-stats { gap:24px; flex-wrap:wrap; }
  .hero-stat-num { font-size:24px; }
  .section { padding:56px 0; }
  .section-title { font-size:24px; }
  .section-header { margin-bottom:40px; }
  .card-grid-2,.card-grid-3,.card-grid-4 { grid-template-columns:1fr; }
  .tool-grid { grid-template-columns:1fr; }
  .stats-bar { grid-template-columns:1fr 1fr; }
  .model-showcase { grid-template-columns:1fr; gap:32px; }
  .model-ring { grid-template-columns:repeat(5, 1fr); }
  .contact-grid { grid-template-columns:1fr; }
  .form-row { grid-template-columns:1fr; }
  .cta-title { font-size:24px; }
  .footer-grid { grid-template-columns:1fr; gap:32px; }
}
@media (max-width:480px) {
  .hero-card-grid { grid-template-columns:1fr; }
  .hero-card.featured { grid-row:span 1; }
  .stats-bar { grid-template-columns:1fr; }
  .hero-title { font-size:26px; }
}