/* ===== 深圳启制科技有限公司 - 全局样式（克莱因蓝科技版） ===== */

/* ===== CSS Variables ===== */
:root {
  /* 克莱因蓝主色系 */
  --primary: #002FA7;       /* 正统 IKB 克莱因蓝 */
  --primary-dark: #001A6E;  /* 深空蓝 */
  --primary-light: #1A4FD6; /* 亮克莱因蓝 */
  --primary-glow: rgba(0,47,167,0.2);
  /* 流光金 - 科技感点缀 */
  --gold: #D4A843;
  --gold-light: #F0C866;
  --gold-dark: #A87820;
  /* 背景：深空系 */
  --bg: #F4F6FB;           /* 极浅冷白，有轻微蓝调 */
  --bg-white: #FFFFFF;
  --bg-gray: #EBF0FA;      /* 淡蓝灰 */
  --bg-dark: #040D2E;      /* 深空背景（用于Hero/Banner） */
  --bg-dark2: #071040;     /* 次级深背景 */
  /* 文字 */
  --text-dark: #0A0E24;    /* 接近黑色的深蓝黑 */
  --text-mid: #2D3560;     /* 中深蓝灰 */
  --text-light: #6B78A8;   /* 淡蓝灰 */
  --text-on-dark: #E8EDFF; /* 深色背景上的文字 */
  /* 边框 */
  --border: #D0D8F0;
  --border-light: #E4EAF8;
  --border-dark: rgba(0,47,167,0.2);
  /* 阴影：克莱因蓝调 */
  --shadow-sm: 0 2px 16px rgba(0,47,167,0.06);
  --shadow-md: 0 10px 40px rgba(0,47,167,0.1);
  --shadow-lg: 0 24px 80px rgba(0,47,167,0.14);
  --shadow-xl: 0 40px 120px rgba(0,47,167,0.2);
  --shadow-gold: 0 8px 32px rgba(212,168,67,0.25);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --nav-h: 80px;
  --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  /* 动效速度 */
  --ease-spring: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text-dark);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* ===== Utility ===== */
.container { max-width: 1360px; margin: 0 auto; padding: 0 48px; }
.section-pad { padding: 120px 0; }
.section-pad-sm { padding: 72px 0; }
.text-center { text-align: center; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.grid { display: grid; }

/* Section Label */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--primary);
  background: rgba(0,47,167,0.07);
  border: 1px solid rgba(0,47,167,0.2);
  padding: 7px 18px;
  border-radius: 100px;
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
}
.section-label::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 6px var(--gold);
  flex-shrink: 0;
}

/* Section Title */
.section-title {
  font-family: var(--font-heading);
  font-size: clamp(32px, 4vw, 56px);
  font-weight: 900;
  color: var(--text-dark);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}
.section-title span { color: var(--primary); }

.section-desc {
  font-size: 18px;
  color: var(--text-mid);
  line-height: 1.75;
  max-width: 640px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 15px;
  padding: 14px 32px;
  border-radius: 100px;
  cursor: pointer;
  transition: all 0.28s var(--ease-spring);
  border: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}
.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: background 0.2s;
}
.btn:hover::after { background: rgba(255,255,255,0.1); }

.btn-primary {
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-dark) 100%);
  color: #fff;
  box-shadow: 0 6px 24px rgba(0,47,167,0.4), inset 0 1px 0 rgba(255,255,255,0.15);
}
.btn-primary:hover {
  box-shadow: 0 12px 36px rgba(0,47,167,0.5), inset 0 1px 0 rgba(255,255,255,0.15);
  transform: translateY(-2px) scale(1.02);
}
.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}
.btn-white {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}
.btn-white:hover {
  box-shadow: 0 8px 28px rgba(0,0,0,0.15);
  transform: translateY(-2px);
}
.btn-gold {
  background: linear-gradient(135deg, var(--gold-light) 0%, var(--gold-dark) 100%);
  color: #fff;
  box-shadow: var(--shadow-gold);
}
.btn-gold:hover {
  box-shadow: 0 12px 40px rgba(212,168,67,0.45);
  transform: translateY(-2px) scale(1.02);
}
.btn svg { width: 18px; height: 18px; flex-shrink: 0; }

/* ===== NAVIGATION ===== */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  /* 首页Hero区：深色半透明，确保白色文字清晰可读，同时与深空背景融合 */
  background: linear-gradient(180deg, rgba(4,13,46,0.75) 0%, rgba(4,13,46,0.45) 100%);
  backdrop-filter: blur(12px) saturate(1.4);
  -webkit-backdrop-filter: blur(12px) saturate(1.4);
  border-bottom: 1px solid rgba(139,184,255,0.12);
  transition: background 0.4s var(--ease-smooth), border-color 0.4s, box-shadow 0.4s var(--ease-smooth), backdrop-filter 0.4s;
}
/* 顶部流光线 */
#navbar::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, var(--primary) 30%, var(--gold) 50%, var(--primary) 70%, transparent 100%);
  opacity: 0;
  transition: opacity 0.4s;
}
/* 首页滚动后 → 与内页一致的白色导航 */
#navbar.scrolled {
  background: rgba(255,255,255,0.98);
  backdrop-filter: blur(20px) saturate(1.6);
  -webkit-backdrop-filter: blur(20px) saturate(1.6);
  border-bottom-color: rgba(0,47,167,0.12);
  box-shadow: 0 4px 32px rgba(0,47,167,0.08);
}
#navbar.scrolled::before { opacity: 1; }
/* 滚动后的链接/Logo颜色也要切到深色 */
#navbar.scrolled .nav-logo .logo-cn { color: var(--text-dark); }
#navbar.scrolled .nav-logo .logo-en { color: var(--text-light); }
#navbar.scrolled .nav-links a { color: var(--text-mid); }
#navbar.scrolled .nav-links a:hover { color: var(--primary); background: rgba(0,47,167,0.05); }
#navbar.scrolled .nav-links a.active { color: var(--primary); background: rgba(0,47,167,0.07); border-color: rgba(0,47,167,0.15); }
#navbar.scrolled .nav-mobile-btn span { background: var(--text-dark); }

/* 内页（非Hero页面）：默认白色导航 */
#navbar.light-nav {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(20px) saturate(1.6);
  -webkit-backdrop-filter: blur(20px) saturate(1.6);
  border-bottom-color: rgba(0,47,167,0.1);
}
#navbar.light-nav.scrolled {
  background: rgba(255,255,255,0.98);
  border-bottom-color: rgba(0,47,167,0.15);
  box-shadow: 0 4px 32px rgba(0,47,167,0.08);
}
#navbar.light-nav::before { opacity: 0; pointer-events: none; }

.nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ---- Logo ---- */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-heading);
  flex-shrink: 0;
}
.nav-logo .logo-icon {
  width: 48px; height: 48px;
  background: linear-gradient(135deg, #1A4FD6 0%, #002FA7 55%, #001A6E 100%);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(0,47,167,0.45), 0 0 0 1px rgba(255,255,255,0.12) inset;
  position: relative;
  overflow: visible;
  transition: box-shadow 0.3s, transform 0.3s var(--ease-spring);
}
.nav-logo .logo-icon::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, transparent 60%);
  border-radius: 12px;
}
/* 呼吸光效 */
.nav-logo .logo-icon::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 16px;
  background: transparent;
  border: 1px solid rgba(0,47,167,0);
  transition: all 0.3s;
}
.nav-logo:hover .logo-icon {
  box-shadow: 0 6px 24px rgba(0,47,167,0.6), 0 0 0 1px rgba(255,255,255,0.15) inset;
  transform: scale(1.05) rotate(-3deg);
}
.nav-logo:hover .logo-icon::after {
  border-color: rgba(0,47,167,0.3);
  inset: -6px;
}
.nav-logo .logo-icon svg { width: 26px; height: 26px; color: #fff; position: relative; z-index: 1; }
.nav-logo .logo-text { display: flex; flex-direction: column; line-height: 1.2; }
/* 深色导航上：文字白色 */
.nav-logo .logo-cn { font-size: 17px; font-weight: 900; color: #fff; letter-spacing: 0.02em; transition: color 0.3s; }
.nav-logo .logo-en { font-size: 10px; font-weight: 600; color: rgba(139,184,255,0.6); letter-spacing: 0.1em; text-transform: uppercase; transition: color 0.3s; }
/* light-nav：文字深色 */
#navbar.light-nav .nav-logo .logo-cn { color: var(--text-dark); }
#navbar.light-nav .nav-logo .logo-en { color: var(--text-light); }

/* ---- Nav Links ---- */
.nav-links { display: flex; align-items: center; gap: 2px; }
.nav-links a {
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 600;
  color: rgba(232,237,255,0.7);
  padding: 8px 13px;
  border-radius: 8px;
  transition: all 0.22s var(--ease-smooth);
  white-space: nowrap;
  letter-spacing: 0.01em;
  position: relative;
}
/* 悬停底部光线 */
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 3px; left: 50%; right: 50%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-light), var(--gold));
  border-radius: 1px;
  transition: left 0.28s var(--ease-spring), right 0.28s var(--ease-spring);
}
.nav-links a:hover {
  color: #fff;
  background: rgba(255,255,255,0.06);
}
.nav-links a:hover::after { left: 13px; right: 13px; }
.nav-links a.active {
  color: #fff;
  background: rgba(0,47,167,0.25);
  border: 1px solid rgba(0,47,167,0.4);
}
.nav-links a.active::after { left: 13px; right: 13px; background: var(--gold); }

/* light-nav 下的链接颜色 */
#navbar.light-nav .nav-links a { color: var(--text-mid); }
#navbar.light-nav .nav-links a:hover { color: var(--primary); background: rgba(0,47,167,0.05); }
#navbar.light-nav .nav-links a.active { color: var(--primary); background: rgba(0,47,167,0.07); border-color: rgba(0,47,167,0.15); }
#navbar.light-nav .nav-links a::after { background: var(--primary); }
#navbar.light-nav .nav-links a.active::after { background: var(--primary); }

/* AI视觉盒子 特殊标记 */
.nav-links a[href="ai-box.html"] {
  color: var(--gold-light) !important;
  background: rgba(212,168,67,0.1) !important;
  border: 1px solid rgba(212,168,67,0.25) !important;
}
.nav-links a[href="ai-box.html"]:hover { background: rgba(212,168,67,0.18) !important; }
.nav-links a[href="ai-box.html"]::after { background: var(--gold) !important; }

/* ---- CTA ---- */
.nav-cta { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.nav-cta .btn { padding: 10px 26px; font-size: 14px; border-radius: 10px; }

/* ---- Mobile Btn ---- */
.nav-mobile-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-mobile-btn span {
  display: block;
  width: 24px; height: 2px;
  background: rgba(232,237,255,0.85);
  margin: 5px 0;
  transition: all 0.3s;
  border-radius: 2px;
}
#navbar.light-nav .nav-mobile-btn span { background: var(--text-dark); }

/* ---- Mobile Menu ---- */
.nav-mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-h); left: 0; right: 0;
  background: rgba(4,13,46,0.97);
  backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(0,47,167,0.3);
  box-shadow: 0 16px 48px rgba(0,0,0,0.5);
  padding: 20px;
  z-index: 999;
  flex-direction: column;
  gap: 4px;
}
.nav-mobile-menu.open { display: flex; }
.nav-mobile-menu a {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 600;
  color: rgba(232,237,255,0.7);
  padding: 12px 16px;
  border-radius: 8px;
  transition: all 0.2s;
}
.nav-mobile-menu a:hover { color: #fff; background: rgba(0,47,167,0.2); }
.nav-mobile-menu a[href="ai-box.html"] { color: var(--gold-light); }
.nav-mobile-menu a.active { color: #fff; background: rgba(0,47,167,0.25); }

/* ===== PAGE WRAPPER ===== */
.page { min-height: 100vh; }
.page-content { padding-top: var(--nav-h); }

/* ===== PAGE TRANSITIONS ===== */
.page {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.2s ease-out, transform 0.2s ease-out;
  will-change: opacity, transform;
}
.page.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== FOOTER ===== */
footer {
  background: var(--bg-dark);
  color: #fff;
  padding: 100px 0 0;
  position: relative;
  overflow: hidden;
}
/* 顶部流光线 */
footer::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--primary) 25%, var(--gold) 50%, var(--primary) 75%, transparent 100%);
}
/* 背景网格 */
footer::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,47,167,0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,47,167,0.07) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 100% 80% at 50% 0%, black 30%, transparent 80%);
  pointer-events: none;
}
/* 右上角光晕 */
.footer-orb-1 {
  position: absolute;
  top: -120px; right: -120px;
  width: 480px; height: 480px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,47,167,0.18) 0%, transparent 70%);
  pointer-events: none;
}
/* 左下角金色光晕 */
.footer-orb-2 {
  position: absolute;
  bottom: 60px; left: -80px;
  width: 320px; height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(212,168,67,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.footer-inner { position: relative; z-index: 1; }

.footer-grid {
  display: grid;
  grid-template-columns: 2.2fr 1fr 1fr 1fr;
  gap: 64px;
  padding-bottom: 64px;
  border-bottom: 1px solid rgba(255,255,255,0.07);
}

/* Brand 列 */
.footer-brand .logo-cn { color: #fff; }
.footer-brand .logo-en { color: rgba(139,184,255,0.4); }
.footer-brand p {
  font-size: 14px;
  color: rgba(255,255,255,0.38);
  line-height: 1.9;
  margin-top: 20px;
  max-width: 340px;
}
.footer-contact-items { margin-top: 28px; display: flex; flex-direction: column; gap: 12px; }
.footer-contact-items a {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13.5px;
  color: rgba(255,255,255,0.4);
  transition: color 0.2s;
  line-height: 1.55;
}
.footer-contact-items a:hover { color: var(--gold-light); }
.footer-contact-items svg { width: 15px; height: 15px; flex-shrink: 0; margin-top: 2px; }

/* Social icons */
.footer-social { display: flex; gap: 10px; margin-top: 24px; }
.footer-social-btn {
  width: 36px; height: 36px;
  border-radius: 9px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,0.4);
  transition: all 0.25s var(--ease-spring);
  cursor: pointer;
}
.footer-social-btn svg { width: 16px; height: 16px; }
.footer-social-btn:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 6px 18px rgba(0,47,167,0.4);
}

/* 链接列 */
.footer-col h4 {
  font-family: var(--font-heading);
  font-size: 12px;
  font-weight: 800;
  color: rgba(255,255,255,0.85);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 24px;
  position: relative;
  padding-bottom: 12px;
}
.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 24px; height: 2px;
  background: linear-gradient(90deg, var(--primary-light), var(--gold));
  border-radius: 1px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 12px; }
.footer-col ul li a {
  font-size: 13.5px;
  color: rgba(255,255,255,0.38);
  transition: all 0.2s;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
}
.footer-col ul li a::before {
  content: '';
  width: 0; height: 1px;
  background: var(--gold);
  transition: width 0.25s var(--ease-spring);
  flex-shrink: 0;
}
.footer-col ul li a:hover { color: rgba(255,255,255,0.85); padding-left: 4px; }
.footer-col ul li a:hover::before { width: 12px; }

/* 底部 */
.footer-bottom {
  padding: 28px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  z-index: 1;
}
.footer-bottom-left { display: flex; align-items: center; gap: 20px; }
.footer-bottom p {
  font-size: 13px;
  color: rgba(255,255,255,0.22);
}
.footer-bottom a {
  font-size: 13px;
  color: rgba(255,255,255,0.22);
  transition: color 0.2s;
}
.footer-bottom a:hover { color: rgba(255,255,255,0.5); }
.footer-bottom-divider {
  width: 1px; height: 14px;
  background: rgba(255,255,255,0.12);
}
/* 底部 Tech badge */
.footer-tech-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: rgba(255,255,255,0.2);
  padding: 5px 12px;
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 100px;
}
.footer-tech-badge span { color: var(--gold); opacity: 0.7; }

/* ===== SCROLL REVEAL ===== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  /* 仅使用 transform/opacity 触发GPU加速，避免layout reflow */
  transition: opacity 0.55s cubic-bezier(0.16,1,0.3,1), transform 0.55s cubic-bezier(0.16,1,0.3,1);
  will-change: opacity, transform;
  contain: layout style;
}
.reveal.in-view { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.12s; }
.reveal-delay-2 { transition-delay: 0.22s; }
.reveal-delay-3 { transition-delay: 0.32s; }
.reveal-delay-4 { transition-delay: 0.42s; }
.reveal-delay-5 { transition-delay: 0.52s; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1280px) {
  .container { padding: 0 32px; }
  .nav-links a { padding: 8px 10px; font-size: 13px; }
}
@media (max-width: 1024px) {
  .container { padding: 0 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
}
@media (max-width: 768px) {
  .section-pad { padding: 80px 0; }
  .nav-links, .nav-cta { display: none; }
  .nav-mobile-btn { display: block; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .footer-bottom-left { flex-direction: column; gap: 8px; }
  .footer-bottom-divider { display: none; }
}
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .section-pad { padding: 60px 0; }
}