/* ===================================================
   迪飞特科技 - 官网全局样式
   File: css/style.css
   Focus: AI智能体本地化部署 | 办公自动化 | 流程管理 | 国产化
   =================================================== */

/* --- CSS Variables --- */
:root {
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --primary-light: #818cf8;
  --accent: #0d9488;
  --accent-light: #14b8a6;
  --accent-dark: #0f766e;
  --ai-accent: #7c3aed;
  --ai-light: #a78bfa;
  --dark: #0f172a;
  --dark-2: #1e293b;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
  --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -1px rgba(0,0,0,.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,.1), 0 4px 6px -2px rgba(0,0,0,.05);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,.1), 0 10px 10px -5px rgba(0,0,0,.04);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --transition: all .3s cubic-bezier(.4,0,.2,1);
}

/* --- Base Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, sans-serif;
  color: var(--dark-2);
  background: #fff;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

/* --- Utility Classes --- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 80px 0; }
.section-title { text-align: center; margin-bottom: 50px; }
.section-title h2 {
  font-size: 2rem; font-weight: 700; color: var(--dark); margin-bottom: 12px;
}
.section-title p {
  font-size: 1.05rem; color: var(--gray-500); max-width: 600px; margin: 0 auto;
}
.section-title .title-bar {
  width: 60px; height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--ai-accent));
  border-radius: 2px; margin: 16px auto 0;
}
.section-title .title-bar.teal {
  background: linear-gradient(90deg, var(--primary), var(--accent));
}

/* --- Buttons --- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: 50px;
  font-size: .95rem; font-weight: 600;
  cursor: pointer; border: none;
  transition: var(--transition);
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover {
  background: var(--primary-dark); transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(79,70,229,.35);
}
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover {
  background: var(--accent-dark); transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(13,148,136,.35);
}
.btn-outline {
  background: transparent; color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-white { background: #fff; color: var(--primary); }
.btn-white:hover { background: var(--gray-100); transform: translateY(-2px); }
.btn-ai { background: var(--ai-accent); color: #fff; }
.btn-ai:hover {
  background: #6d28d9; transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(124,58,237,.35);
}

/* =============================================
   HEADER / NAV
   ============================================= */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,.98);
  border-bottom: 1px solid rgba(0,0,0,.06);
  transition: var(--transition);
}
.header.scrolled { box-shadow: 0 2px 20px rgba(0,0,0,.08); }
.header-inner { display: flex; align-items: center; height: 72px; }
.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; width: 180px; }
.logo img { height: 40px; width: auto; object-fit: contain; }
.logo-text {
  font-size: 1.15rem; font-weight: 700;
  background: linear-gradient(135deg, var(--primary) 0%, var(--ai-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}
.nav-menu { display: flex; align-items: center; justify-content: center; flex: 1; }
.nav-menu a {
  padding: 8px 16px; font-size: .9rem; font-weight: 500;
  color: var(--gray-600); border-radius: 8px;
  transition: var(--transition); position: relative; margin: 0 2px;
}
.nav-menu a:hover, .nav-menu a.active {
  color: var(--primary); background: rgba(79,70,229,.06);
}
.nav-menu a.active::after {
  content: '';
  position: absolute; bottom: 2px; left: 50%;
  transform: translateX(-50%); width: 20px; height: 3px;
  background: var(--primary); border-radius: 2px;
}
.header-cta { display: flex; align-items: center; margin-left: auto; }
.phone-wrapper { display: flex; flex-direction: column; align-items: flex-end; }
.phone-label { font-size: .7rem; color: var(--gray-400); white-space: nowrap; }
.phone-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 1.05rem; font-weight: 700; color: var(--primary);
  padding: 4px 16px 4px 12px; border-radius: 50px;
  background: linear-gradient(135deg, rgba(79,70,229,.08), rgba(79,70,229,.03));
  border: 1px solid rgba(79,70,229,.15);
  transition: var(--transition); white-space: nowrap;
}
.phone-link:hover { background: var(--primary); color: #fff; }
.menu-toggle {
  display: none; background: none; border: none;
  font-size: 1.4rem; color: var(--dark); cursor: pointer;
  padding: 8px; margin-left: auto;
}

/* =============================================
   FOOTER
   ============================================= */
.footer {
  background: var(--dark);
  color: var(--gray-300);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px;
}
.footer-brand p { font-size: .9rem; line-height: 1.7; margin: 16px 0; color: var(--gray-400); }
.footer-socials { display: flex; gap: 12px; }
.footer-socials a {
  width: 40px; height: 40px; border-radius: 50%;
  background: rgba(255,255,255,.08); display: flex;
  align-items: center; justify-content: center;
  color: var(--gray-400); transition: var(--transition);
  font-size: 1.1rem;
}
.footer-socials a:hover { background: var(--primary); color: #fff; }
.footer h4 { color: #fff; font-size: 1rem; margin-bottom: 20px; font-weight: 600; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a {
  color: var(--gray-400); font-size: .9rem;
  transition: var(--transition);
}
.footer-links a:hover { color: var(--primary-light); padding-left: 4px; }
.footer-contact p {
  display: flex; align-items: center; gap: 10px;
  font-size: .9rem; margin-bottom: 12px; color: var(--gray-400);
}
.footer-contact p i { width: 16px; color: var(--primary-light); }
.qr-codes { display: flex; gap: 16px; margin-top: 16px; }
.qr-item { text-align: center; }
.qr-item img { width: 90px; height: 90px; border-radius: 8px; background: #fff; padding: 4px; }
.qr-item span { display: block; font-size: .75rem; margin-top: 4px; color: var(--gray-400); }
.footer-bottom {
  margin-top: 40px; padding: 20px 0;
  border-top: 1px solid rgba(255,255,255,.08);
  display: flex; justify-content: space-between;
  font-size: .8rem; color: var(--gray-500);
  flex-wrap: wrap; gap: 8px;
}
.footer-bottom a { color: var(--gray-500); }
.footer-bottom a:hover { color: var(--primary-light); }

/* =============================================
   HERO SWIPER
   ============================================= */
.hero-swiper { width: 100%; height: 100vh; min-height: 600px; }
.hero-slide {
  position: relative; display: flex; align-items: center; justify-content: center;
  height: 100vh; min-height: 600px;
  box-shadow: inset 0 80px 100px -40px rgba(0,0,0,.55), inset 0 -80px 100px -40px rgba(0,0,0,.55);
  background-size: cover; background-position: center;
}
.hero-overlay { position: absolute; inset: 0; background: rgba(15,23,42,.65); }
.hero-content {
  position: relative; z-index: 2; text-align: center;
  color: #fff; max-width: 800px; padding: 0 20px;
}
.hero-badge {
  display: inline-block; padding: 6px 18px; border-radius: 50px;
  font-size: .8rem; font-weight: 500; margin-bottom: 20px;
  background: rgba(124,58,237,.3); border: 1px solid rgba(167,139,250,.3);
  color: #c4b5fd;
}
.hero-content h1 {
  font-size: 3rem; font-weight: 800; line-height: 1.2; margin-bottom: 20px;
}
.hero-content p {
  font-size: 1.1rem; color: rgba(255,255,255,.8); margin-bottom: 32px;
  line-height: 1.7;
}
.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* =============================================
   PAGE BANNER (inner pages)
   ============================================= */
.page-banner {
  padding: 140px 0 80px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--ai-accent) 100%);
  text-align: center; color: #fff;
  position: relative; overflow: hidden;
}
.page-banner::before {
  content: ''; position: absolute; inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.page-banner h1 { font-size: 2.5rem; font-weight: 700; margin-bottom: 12px; position: relative; z-index: 1; }
.page-banner p { font-size: 1.05rem; color: rgba(255,255,255,.85); max-width: 600px; margin: 0 auto; position: relative; z-index: 1; }

/* =============================================
   CORE BUSINESS CARDS
   ============================================= */
.business-grid {
  display: grid; grid-template-columns: repeat(4,1fr); gap: 24px;
}
.business-card {
  background: #fff; border-radius: var(--radius-lg); padding: 36px 28px;
  text-align: center; border: 1px solid var(--gray-200);
  transition: var(--transition); position: relative; overflow: hidden;
}
.business-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--ai-accent));
  opacity: 0; transition: var(--transition);
}
.business-card:hover::before { opacity: 1; }
.business-card:hover {
  transform: translateY(-6px); box-shadow: var(--shadow-xl); border-color: transparent;
}
.business-icon {
  width: 56px; height: 56px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 20px; font-size: 1.5rem;
}
.business-card h3 { font-size: 1.15rem; font-weight: 600; margin-bottom: 10px; }
.business-card p { font-size: .9rem; color: var(--gray-500); line-height: 1.6; }

/* =============================================
   AI DARK SECTION
   ============================================= */
.ai-dark-section {
  background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
  padding: 80px 0; color: #fff;
}
.ai-dark-section .section-title h2 { color: #fff; }
.ai-dark-section .section-title p { color: rgba(255,255,255,.6); }
.ai-dark-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; }
.ai-dark-card {
  background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius-lg); padding: 32px 24px;
  text-align: center; transition: var(--transition);
  backdrop-filter: blur(10px);
}
.ai-dark-card:hover {
  background: rgba(255,255,255,.1); transform: translateY(-4px);
  border-color: rgba(167,139,250,.3);
}
.ai-dark-card .card-icon {
  width: 56px; height: 56px; border-radius: 14px; margin: 0 auto 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
}
.ai-dark-card h4 { font-size: 1.05rem; margin-bottom: 10px; }
.ai-dark-card p { font-size: .85rem; color: rgba(255,255,255,.6); line-height: 1.6; }

/* =============================================
   KNOWLEDGE SECTION (日更知识点)
   ============================================= */
.knowledge-list { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.knowledge-item {
  background: #fff; border: 1px solid var(--gray-200);
  border-radius: var(--radius); padding: 24px; transition: var(--transition);
  cursor: default;
}
.knowledge-item:hover {
  border-color: var(--primary-light); box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.knowledge-item .k-tag {
  display: inline-block; padding: 2px 10px; border-radius: 50px;
  font-size: .7rem; font-weight: 500; margin-bottom: 10px;
}
.knowledge-item h4 { font-size: .95rem; font-weight: 600; margin-bottom: 8px; line-height: 1.4; }
.knowledge-item p { font-size: .82rem; color: var(--gray-500); line-height: 1.5; }
.knowledge-more {
  text-align: center; margin-top: 30px;
}

/* =============================================
   PRODUCTS & SOLUTIONS SECTION
   ============================================= */
.product-solution-section {
  background: var(--gray-50);
}
.ps-filter {
  display: flex; justify-content: center; gap: 8px; margin-bottom: 32px;
  flex-wrap: wrap;
}
.ps-filter button {
  padding: 7px 18px; border-radius: 50px; border: 1px solid var(--gray-200);
  background: #fff; font-size: .82rem; font-weight: 500;
  color: var(--gray-600); cursor: pointer; transition: var(--transition);
  display: inline-flex; align-items: center; gap: 6px;
}
.ps-filter button:hover, .ps-filter button.active {
  background: var(--primary); color: #fff; border-color: var(--primary);
}
.ps-grid {
  display: grid; grid-template-columns: repeat(4,1fr); gap: 20px;
}
.ps-card {
  background: #fff; border-radius: var(--radius);
  border: 1px solid var(--gray-200); overflow: hidden;
  cursor: pointer; transition: var(--transition);
}
.ps-card:hover {
  transform: translateY(-5px); box-shadow: var(--shadow-xl);
  border-color: transparent;
}
.ps-card-img {
  position: relative; width: 100%; padding-top: 66%; overflow: hidden;
  background: var(--gray-100);
}
.ps-card-img img {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  object-fit: cover; transition: transform .5s ease;
}
.ps-card:hover .ps-card-img img {
  transform: scale(1.08);
}
.ps-card-cat {
  position: absolute; top: 10px; left: 10px;
  padding: 2px 10px; border-radius: 50px;
  font-size: .68rem; font-weight: 500;
  background: rgba(79,70,229,.88); color: #fff;
  z-index: 2;
}
.ps-card-body {
  padding: 16px 18px 18px;
}
.ps-card-body h3 {
  font-size: .92rem; font-weight: 600; margin-bottom: 6px;
  line-height: 1.4; display: -webkit-box;
  -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.ps-card-body p {
  font-size: .78rem; color: var(--gray-500); line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}

/* ===== Product Modal ===== */
.ps-modal {
  display: none; position: fixed; inset: 0; z-index: 9999;
  align-items: center; justify-content: center;
}
.ps-modal.active { display: flex; }
.ps-modal-overlay {
  position: absolute; inset: 0; background: rgba(15,23,42,.7);
  backdrop-filter: blur(4px);
}
.ps-modal-inner {
  position: relative; max-width: 880px; width: 92%; max-height: 88vh;
  background: #fff; border-radius: var(--radius-lg);
  overflow: hidden; display: flex; flex-direction: column;
  animation: modalIn .3s ease;
}
@keyframes modalIn {
  from { opacity: 0; transform: scale(.95) translateY(20px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}
.ps-modal-header {
  display: flex; align-items: center; gap: 12px;
  padding: 18px 24px; border-bottom: 1px solid var(--gray-200);
  flex-shrink: 0;
}
.ps-modal-header h3 {
  font-size: 1.1rem; font-weight: 600; flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden;
}
.ps-modal-cat {
  padding: 3px 12px; border-radius: 50px;
  font-size: .72rem; font-weight: 500;
  background: rgba(79,70,229,.12); color: var(--primary);
  white-space: nowrap; flex-shrink: 0;
}
.ps-modal-close {
  width: 32px; height: 32px; border-radius: 50%;
  border: none; background: var(--gray-100);
  color: var(--gray-500); cursor: pointer; font-size: .9rem;
  transition: var(--transition); display: flex;
  align-items: center; justify-content: center; flex-shrink: 0;
}
.ps-modal-close:hover { background: var(--gray-200); color: var(--dark); }
.ps-modal-body {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0;
  overflow-y: auto; flex: 1;
}
.ps-modal-gallery {
  background: var(--gray-100); display: flex;
  flex-direction: column;
}
.ps-modal-img-main {
  flex: 1; display: flex; align-items: center; justify-content: center;
  padding: 20px; min-height: 280px;
}
.ps-modal-img-main img {
  max-width: 100%; max-height: 360px; object-fit: contain;
  border-radius: var(--radius-sm);
}
.ps-modal-thumbs {
  display: flex; gap: 8px; padding: 0 16px 16px;
  justify-content: center;
}
.ps-modal-thumbs .thumb-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--gray-300); cursor: pointer;
  transition: var(--transition); border: none;
}
.ps-modal-thumbs .thumb-dot.active { background: var(--primary); transform: scale(1.3); }
.ps-modal-info {
  padding: 24px; overflow-y: auto;
}
.ps-modal-desc {
  font-size: .88rem; color: var(--gray-600); line-height: 1.8;
  margin-bottom: 20px;
}
.ps-modal-features h4 {
  font-size: .92rem; font-weight: 600; margin-bottom: 10px;
  color: var(--primary); display: flex; align-items: center; gap: 6px;
}
.ps-modal-features h4::before {
  content: '\f0a4'; font-family: 'Font Awesome 6 Free'; font-weight: 900;
  font-size: .8rem;
}
.ps-modal-features ul {
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px;
}
.ps-modal-features li {
  font-size: .82rem; color: var(--gray-600); line-height: 1.5;
  padding-left: 18px; position: relative;
}
.ps-modal-features li::before {
  content: ''; position: absolute; left: 0; top: 7px;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
}

/* =============================================
   CASES SECTION
   ============================================= */
.case-filter {
  display: flex; justify-content: center; gap: 8px; margin-bottom: 32px;
  flex-wrap: wrap;
}
.case-filter button {
  padding: 8px 20px; border-radius: 50px; border: 1px solid var(--gray-200);
  background: #fff; font-size: .85rem; font-weight: 500;
  color: var(--gray-600); cursor: pointer; transition: var(--transition);
}
.case-filter button:hover, .case-filter button.active {
  background: var(--primary); color: #fff; border-color: var(--primary);
}
.case-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
.case-card {
  background: #fff; border: 1px solid var(--gray-200);
  border-radius: var(--radius); overflow: hidden; transition: var(--transition);
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.case-card-body { padding: 20px; }
.case-card .case-industry {
  display: inline-block; padding: 2px 10px; border-radius: 50px;
  font-size: .7rem; font-weight: 500; margin-bottom: 8px;
}
.case-card h4 { font-size: .95rem; font-weight: 600; margin-bottom: 6px; }
.case-card p { font-size: .82rem; color: var(--gray-500); line-height: 1.5; }

/* =============================================
   STATS SECTION
   ============================================= */
.stats-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--ai-accent) 100%);
  padding: 60px 0; color: #fff;
}
.stats-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; text-align: center; }
.stat-item h3 { font-size: 2.5rem; font-weight: 800; margin-bottom: 4px; }
.stat-item p { font-size: .9rem; color: rgba(255,255,255,.75); }

/* =============================================
   WHY US
   ============================================= */
.why-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; }
.why-card {
  background: #fff; border-radius: var(--radius-lg); padding: 32px 24px;
  text-align: center; border: 1px solid var(--gray-200);
  transition: var(--transition);
}
.why-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.why-icon {
  width: 56px; height: 56px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 16px; font-size: 1.4rem;
}
.why-card h4 { font-size: 1rem; font-weight: 600; margin-bottom: 8px; }
.why-card p { font-size: .85rem; color: var(--gray-500); line-height: 1.6; }

/* =============================================
   CTA SECTION
   ============================================= */
.cta-section {
  text-align: center; padding: 60px 0;
  background: linear-gradient(135deg, var(--primary), var(--ai-accent));
  color: #fff;
}
.cta-section h2 { font-size: 1.8rem; font-weight: 700; margin-bottom: 12px; }
.cta-section p { color: rgba(255,255,255,.8); margin-bottom: 24px; }

/* =============================================
   ABOUT — TIMELINE
   ============================================= */
.timeline-section { padding: 80px 0; background: var(--gray-50); }
.timeline { position: relative; max-width: 800px; margin: 0 auto; padding: 20px 0; }
.timeline::before {
  content: ''; position: absolute; left: 50%; top: 0; bottom: 0;
  width: 3px; background: linear-gradient(180deg, var(--primary), var(--ai-accent));
  transform: translateX(-50%); border-radius: 2px;
}
.timeline-item {
  position: relative; display: flex; align-items: flex-start;
  margin-bottom: 40px; width: 100%;
}
.timeline-item:nth-child(odd) { flex-direction: row; }
.timeline-item:nth-child(even) { flex-direction: row-reverse; }
.timeline-dot {
  position: absolute; left: 50%; top: 20px;
  width: 18px; height: 18px; background: var(--primary);
  border: 4px solid #fff; border-radius: 50%;
  transform: translateX(-50%); z-index: 2;
  box-shadow: 0 0 0 3px rgba(79,70,229,.2);
}
.timeline-content {
  width: calc(50% - 40px); padding: 20px 24px;
  background: #fff; border-radius: var(--radius);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm); transition: var(--transition);
}
.timeline-content:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.timeline-content .tl-year {
  display: inline-block; font-size: .8rem; font-weight: 700;
  color: var(--primary); margin-bottom: 6px;
}
.timeline-content h4 { font-size: .95rem; font-weight: 600; margin-bottom: 4px; }
.timeline-content p { font-size: .82rem; color: var(--gray-500); line-height: 1.6; }

@media (max-width: 768px) {
  .timeline::before { left: 20px; }
  .timeline-item,
  .timeline-item:nth-child(even) { flex-direction: row; padding-left: 50px; }
  .timeline-dot { left: 20px; }
  .timeline-content { width: 100%; }
}

/* =============================================
   CONTACT PAGE
   ============================================= */
.contact-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; }
.contact-card {
  background: #fff; border-radius: var(--radius-lg); padding: 32px 24px;
  text-align: center; border: 1px solid var(--gray-200); transition: var(--transition);
}
.contact-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.contact-card .contact-icon {
  width: 56px; height: 56px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 16px; font-size: 1.4rem;
}
.contact-card h4 { font-size: 1rem; font-weight: 600; margin-bottom: 8px; }
.contact-card p { font-size: .85rem; color: var(--gray-500); line-height: 1.6; }

/* =============================================
   ABOUT PAGE
   ============================================= */
.about-intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.about-intro-text h2 { font-size: 1.8rem; font-weight: 700; margin-bottom: 16px; }
.about-intro-text p { color: var(--gray-600); line-height: 1.8; margin-bottom: 12px; }
.about-features { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 60px; }
.about-feature {
  display: flex; gap: 16px; padding: 20px; background: var(--gray-50);
  border-radius: var(--radius); align-items: flex-start;
}
.about-feature .af-icon {
  width: 44px; height: 44px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; font-size: 1.1rem;
}
.about-feature h4 { font-size: .95rem; font-weight: 600; margin-bottom: 4px; }
.about-feature p { font-size: .82rem; color: var(--gray-500); line-height: 1.5; }

/* =============================================
   PRODUCT PAGE
   ============================================= */
.product-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.product-card {
  background: #fff; border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200); overflow: hidden; transition: var(--transition);
}
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-xl); }
.product-card-img {
  height: 200px; display: flex; align-items: center; justify-content: center;
  font-size: 3rem;
}
.product-card-body { padding: 24px; }
.product-card-body h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 10px; }
.product-card-body p { font-size: .85rem; color: var(--gray-500); line-height: 1.6; margin-bottom: 16px; }
.product-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.product-tags span {
  padding: 2px 10px; border-radius: 50px; font-size: .7rem;
  background: var(--gray-100); color: var(--gray-600);
}

/* =============================================
   CASES INNER PAGE
   ============================================= */
.cases-nav {
  position: sticky; top: 72px; z-index: 100;
  background: #fff; border-bottom: 1px solid var(--gray-200);
  padding: 16px 0;
}
.cases-nav-inner { display: flex; gap: 8px; flex-wrap: wrap; }
.cases-nav-btn {
  padding: 8px 18px; border-radius: 50px; border: 1px solid var(--gray-200);
  background: #fff; font-size: .85rem; cursor: pointer;
  transition: var(--transition); color: var(--gray-600);
}
.cases-nav-btn:hover, .cases-nav-btn.active {
  background: var(--primary); color: #fff; border-color: var(--primary);
}
.cases-section { margin-bottom: 40px; }
.cases-section h3 {
  font-size: 1.3rem; font-weight: 700; margin-bottom: 20px;
  display: flex; align-items: center; gap: 10px;
}

/* =============================================
   404 PAGE
   ============================================= */
.page-404 {
  min-height: 100vh; display: flex; align-items: center;
  justify-content: center; text-align: center; padding: 120px 20px;
}
.page-404 h1 { font-size: 6rem; font-weight: 800; color: var(--primary); margin-bottom: 10px; }
.page-404 h2 { font-size: 1.5rem; font-weight: 600; margin-bottom: 16px; }
.page-404 p { color: var(--gray-500); margin-bottom: 24px; }

/* =============================================
   SWIPER OVERRIDES
   ============================================= */
.swiper-pagination-bullet { width: 12px; height: 12px; background: rgba(255,255,255,.4); opacity: 1; }
.swiper-pagination-bullet-active { background: #fff; width: 32px; border-radius: 6px; }
.swiper-button-next, .swiper-button-prev { color: #fff; }

/* =============================================
   AOS FIXES
   ============================================= */
[data-aos] { pointer-events: none; }
[data-aos].aos-animate { pointer-events: auto; }

/* =============================================
   RESPONSIVE - TABLET (max-width: 992px)
   ============================================= */
@media (max-width: 992px) {
  .business-grid, .ai-dark-grid, .why-grid, .stats-grid,
  .contact-grid, .case-grid { grid-template-columns: repeat(2,1fr); }
  .knowledge-list { grid-template-columns: repeat(2,1fr); }
  .product-grid { grid-template-columns: repeat(2,1fr); }
  .ps-grid { grid-template-columns: repeat(2,1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
  .about-intro-grid { grid-template-columns: 1fr; gap: 30px; }
  .hero-content h1 { font-size: 2.2rem; }
  .section { padding: 60px 0; }
}

/* =============================================
   RESPONSIVE - MOBILE (max-width: 768px)
   ============================================= */
@media (max-width: 768px) {
  .menu-toggle { display: block; }
  .nav-menu {
    position: fixed; top: 72px; left: 0; right: 0; bottom: 0;
    background: rgba(255,255,255,.98);
    flex-direction: column; justify-content: flex-start; padding: 30px 20px;
    transform: translateY(-120%); opacity: 0;
    transition: all .35s cubic-bezier(.4,0,.2,1);
    z-index: 1001; overflow-y: auto;
    flex: 0 0 0; width: 0;
  }
  .nav-menu.open {
    transform: translateY(0); opacity: 1;
    width: 100%;
  }
  .nav-menu a { font-size: 1rem; padding: 12px 16px; width: 100%; text-align: center; }
  .nav-menu a.active::after { display: none; }
  .header-cta { display: none; }
  .hero-content h1 { font-size: 1.8rem; }
  .hero-content p { font-size: .95rem; }
  .hero-swiper, .hero-slide { min-height: 500px; height: 85vh; }
  .business-grid, .ai-dark-grid, .why-grid, .stats-grid,
  .contact-grid, .case-grid { grid-template-columns: repeat(2,1fr); gap: 16px; }
  .knowledge-list { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: 1fr; }
  .ps-grid { grid-template-columns: repeat(2,1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .business-card, .ai-dark-card, .why-card { padding: 24px 20px; }
  .ps-modal-body { grid-template-columns: 1fr; }
  .ps-modal-img-main { min-height: 200px; }
  .ps-modal-features ul { grid-template-columns: 1fr; }
  .section { padding: 50px 0; }
  .section-title h2 { font-size: 1.5rem; }
  .page-banner { padding: 120px 0 60px; }
  .page-banner h1 { font-size: 1.8rem; }
}

/* =============================================
   RESPONSIVE - SMALL MOBILE (max-width: 480px)
   ============================================= */
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .business-grid, .ai-dark-grid, .why-grid, .stats-grid,
  .contact-grid, .case-grid { grid-template-columns: 1fr; }
  .ps-grid { grid-template-columns: 1fr; }
  .about-features { grid-template-columns: 1fr; }
  .logo { width: auto; }
  .logo-text { display: none; }
  .phone-link { width: 38px; height: 38px; padding: 0; justify-content: center; border-radius: 50%; }
  .hero-content h1 { font-size: 1.5rem; }
  .section-title h2 { font-size: 1.3rem; }
  .stats-grid .stat-item h3 { font-size: 1.8rem; }
  .business-icon, .why-icon, .contact-card .contact-icon { width: 44px; height: 44px; font-size: 1.2rem; }
  .page-banner { padding: 100px 0 40px; }
  .page-banner h1 { font-size: 1.5rem; }
  .contact-grid { grid-template-columns: 1fr; }
}