/* =====================================================
   Xynapse · 门面网站主样式
   暗色系 · 赛博朋克 · 玻璃拟态 · 故障效果
   ===================================================== */

/* -------- 字体 (系统字体栈，无外部依赖) -------- */

/* -------- 设计变量 -------- */
:root {
  --bg-0: #050810;
  --bg-1: #0a0e1a;
  --bg-2: #111827;
  --bg-card: rgba(17, 24, 39, 0.55);
  --bg-card-hi: rgba(31, 41, 55, 0.7);
  --border: rgba(0, 240, 255, 0.18);
  --border-hi: rgba(0, 240, 255, 0.45);
  --text: #e2e8f0;
  --text-dim: #94a3b8;
  --text-mute: #64748b;
  --cyan: #00f0ff;
  --purple: #a855f7;
  --pink: #ec4899;
  --green: #10b981;
  --orange: #f97316;  /* BETA / TOOLBOX 标识色 */
  --glow-cyan: 0 0 30px rgba(0, 240, 255, 0.35);
  --glow-purple: 0 0 30px rgba(168, 85, 247, 0.35);
  --grad-1: linear-gradient(135deg, #00f0ff 0%, #a855f7 100%);
  --grad-2: linear-gradient(135deg, #a855f7 0%, #ec4899 100%);
  --grad-3: linear-gradient(135deg, #00f0ff 0%, #ec4899 100%);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
  --nav-bg: rgba(10, 14, 26, 0.6);
  --nav-bg-scroll: rgba(5, 8, 16, 0.85);
  --font-head: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, 'Courier New', monospace;
  color-scheme: dark;
}

/* -------- 2026-08-20 · 亮色主题（眼不好使可选；token 反转 + 关键硬编码覆盖） -------- */
:root[data-theme="light"] {
  --bg-0: #f6f8fb;
  --bg-1: #ffffff;
  --bg-2: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.78);
  --bg-card-hi: rgba(255, 255, 255, 0.94);
  --border: rgba(8, 145, 178, 0.22);
  --border-hi: rgba(8, 145, 178, 0.45);
  --text: #1e293b;
  --text-dim: #475569;
  --text-mute: #94a3b8;
  --cyan: #0891b2;
  --purple: #7c3aed;
  --pink: #db2777;
  --green: #059669;
  --orange: #ea580c;
  --glow-cyan: 0 0 24px rgba(8, 145, 178, 0.22);
  --glow-purple: 0 0 24px rgba(124, 58, 237, 0.22);
  --shadow-card: 0 4px 16px rgba(15, 23, 42, 0.08);
  --nav-bg: rgba(255, 255, 255, 0.75);
  --nav-bg-scroll: rgba(255, 255, 255, 0.92);
  color-scheme: light;
}

/* 平滑过渡 */
body, .nav, .glass, .form input, .form textarea, .code-block, .btn, .stat-bar, .section-title h2::after {
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

/* -------- 基础重置 -------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--bg-1);
  color: var(--text);
  line-height: 1.7;
  font-weight: 400;
  overflow-x: hidden;
  min-height: 100vh;
  position: relative;
}

/* 全局背景层: 扫描线 + 网格 + 径向光 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(0,240,255,0.10) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 100%, rgba(168,85,247,0.10) 0%, transparent 50%),
    linear-gradient(rgba(0,240,255,0.04) 1px, transparent 1px) 0 0 / 60px 60px,
    linear-gradient(90deg, rgba(0,240,255,0.04) 1px, transparent 1px) 0 0 / 60px 60px;
  z-index: -2;
  pointer-events: none;
}
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    180deg,
    transparent 0,
    transparent 2px,
    rgba(0, 240, 255, 0.015) 2px,
    rgba(0, 240, 255, 0.015) 3px
  );
  z-index: -1;
  pointer-events: none;
}

a { color: inherit; text-decoration: none; transition: color 0.2s; }
img, svg { max-width: 100%; display: block; }

/* -------- 排版 -------- */
h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.2;
  color: #fff;
  letter-spacing: 0.02em;
}
h1 { font-size: clamp(2.5rem, 6vw, 5rem); font-weight: 900; }
h2 { font-size: clamp(1.8rem, 4vw, 3rem); }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.8rem); }
p { color: var(--text-dim); }

.font-mono { font-family: var(--font-mono); }
.text-cyan { color: var(--cyan); }
.text-purple { color: var(--purple); }
.text-pink { color: var(--pink); }
.text-grad-1 { background: var(--grad-1); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; display: inline-block; }
.text-grad-2 { background: var(--grad-2); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; display: inline-block; }
.text-grad-3 { background: var(--grad-3); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; display: inline-block; }

/* -------- 容器 -------- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; position: relative; }
.section-sm { padding: 64px 0; }

/* -------- 导航栏 -------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 16px 0;
  background: var(--nav-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s;
}
.nav.is-scrolled { background: var(--nav-bg-scroll); }
/* nav-inner 用 align-items:center，nav-links 用 margin-left:auto 推到右侧，
   theme-toggle 跟在 nav-links 后面自然就是最右 */
.nav-inner { display: flex; align-items: center; gap: 16px; }
.nav-logo img { height: 26px; }
.nav-links { display: flex; gap: 32px; list-style: none; margin-left: auto; }
.nav-links > li { position: relative; }
.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-dim);
  position: relative;
  padding: 4px 0;
}
.nav-links a:hover, .nav-links a.active { color: var(--cyan); }

/* 管理后台链接（footer 内低调样式） */
.footer-admin-link {
  display: inline-flex !important;
  align-items: center;
  gap: 5px;
  opacity: 0.55;
  font-size: 0.82rem !important;
  color: var(--text-mute) !important;
  transition: opacity .18s ease, color .18s ease;
}
.footer-admin-link svg {
  width: 12px;
  height: 12px;
  flex-shrink: 0;
}
.footer-admin-link:hover {
  opacity: 1;
  color: var(--cyan) !important;
}

.footer-admin {
  color: var(--cyan) !important;
  opacity: 0.85;
}
.footer-admin:hover { opacity: 1; }

/* 下拉菜单 */
.nav-links .has-dropdown { position: relative; }
/* 透明 hover bridge：填充父 li 与 dropdown 之间的 8px 间隙，
   鼠标从"研究▾"向下移到菜单项时不会穿过无 hover 区域导致菜单消失 */
.nav-links .has-dropdown::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  height: 8px;
  z-index: 99;
  pointer-events: auto;
}
.nav-links .dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-card-hi);
  border: 1px solid var(--border-hi);
  border-radius: 6px;
  padding: 8px;
  min-width: 160px;
  list-style: none;
  margin-top: 8px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.5);
  backdrop-filter: blur(8px);
  z-index: 100;
}
.nav-links .dropdown-menu::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%) rotate(45deg);
  width: 10px;
  height: 10px;
  background: var(--bg-card-hi);
  border-top: 1px solid var(--border-hi);
  border-left: 1px solid var(--border-hi);
}
.nav-links .has-dropdown:hover .dropdown-menu,
.nav-links .has-dropdown.open .dropdown-menu {
  display: block;
}
.nav-links .dropdown-menu li { margin: 0; }
.nav-links .dropdown-menu a {
  display: block;
  padding: 8px 12px;
  border-radius: 4px;
  font-size: 0.88rem;
  white-space: nowrap;
}
.nav-links .dropdown-menu a::after { display: none; }
.nav-links .dropdown-menu a:hover {
  background: rgba(0, 240, 255, 0.1);
}
.nav-links a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -4px;
  width: 0; height: 1px;
  background: var(--grad-1);
  transition: width 0.25s;
}
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }

.nav-toggle {
  display: none;
  background: none; border: 1px solid var(--border);
  color: var(--cyan); padding: 8px 10px;
  border-radius: 6px; cursor: pointer;
}

/* -------- Hero -------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 120px 0 80px;
  text-align: center;
  overflow: hidden;
}
#hero-canvas {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.hero-inner { position: relative; z-index: 2; max-width: 900px; padding: 0 24px; }

.hero-tag {
  display: inline-block;
  padding: 6px 16px;
  border: 1px solid var(--border-hi);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--cyan);
  letter-spacing: 0.1em;
  margin-bottom: 24px;
  background: rgba(0, 240, 255, 0.05);
}

/* Hero 主品牌 logo（透明背景 PNG，纯白字 + 柔和青/紫光晕，无边界感） */
.hero-logo {
  display: block;
  max-width: 640px;
  width: 88%;
  height: auto;
  margin: 0 auto 32px;
  /* 大半径、低不透明度的 drop-shadow，不会暴露图片矩形边界 */
  filter:
    drop-shadow(0 0 32px rgba(0, 240, 255, 0.4))
    drop-shadow(0 0 80px rgba(168, 85, 247, 0.3));
  /* 平滑呼吸光晕（连续过渡，无 steps 跳变，无 clip-path 切片，无 transform 抖动） */
  animation: hero-pulse 6s ease-in-out infinite;
  transition: transform 0.4s ease;
  will-change: filter;
}
.hero-logo:hover {
  transform: scale(1.03);
  animation-play-state: paused;
}

/* 柔和平滑的呼吸光晕，透明度在 0.25 ↔ 0.55 之间循环 */
@keyframes hero-pulse {
  0%, 100% {
    filter:
      drop-shadow(0 0 32px rgba(0, 240, 255, 0.30))
      drop-shadow(0 0 80px rgba(168, 85, 247, 0.22));
  }
  50% {
    filter:
      drop-shadow(0 0 48px rgba(0, 240, 255, 0.50))
      drop-shadow(0 0 110px rgba(168, 85, 247, 0.38));
  }
}

/* 减少动画偏好：尊重用户系统设置 */
@media (prefers-reduced-motion: reduce) {
  .hero-logo {
    animation: none;
  }
}

/* 故障文字效果 */
.glitch {
  position: relative;
  display: inline-block;
  color: var(--text);
}
.glitch::before, .glitch::after {
  content: attr(data-text);
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: var(--bg-1);
  overflow: hidden;
}
.glitch::before {
  left: 2px;
  text-shadow: -2px 0 var(--cyan);
  animation: glitch-1 3s infinite linear alternate-reverse;
  clip-path: polygon(0 0, 100% 0, 100% 33%, 0 33%);
}
.glitch::after {
  left: -2px;
  text-shadow: 2px 0 var(--pink);
  animation: glitch-2 3s infinite linear alternate-reverse;
  clip-path: polygon(0 67%, 100% 67%, 100% 100%, 0 100%);
}
@keyframes glitch-1 {
  0%,100% { clip-path: polygon(0 0, 100% 0, 100% 33%, 0 33%); }
  25% { clip-path: polygon(0 25%, 100% 25%, 100% 50%, 0 50%); }
  50% { clip-path: polygon(0 50%, 100% 50%, 100% 75%, 0 75%); }
  75% { clip-path: polygon(0 75%, 100% 75%, 100% 100%, 0 100%); }
}
@keyframes glitch-2 {
  0%,100% { clip-path: polygon(0 67%, 100% 67%, 100% 100%, 0 100%); }
  25% { clip-path: polygon(0 0, 100% 0, 100% 33%, 0 33%); }
  50% { clip-path: polygon(0 33%, 100% 33%, 100% 66%, 0 66%); }
  75% { clip-path: polygon(0 50%, 100% 50%, 100% 67%, 0 67%); }
}

.hero-tagline {
  margin-top: 28px;
  font-size: clamp(1.1rem, 2.2vw, 1.4rem);
  color: var(--text);
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
  letter-spacing: 0.01em;
}

.hero-subtitle {
  margin-top: 14px;
  font-size: clamp(0.85rem, 1.4vw, 0.95rem);
  color: var(--text-dim);
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  letter-spacing: 0.08em;
  font-family: var(--font-mono);
}

.hero-cta {
  margin-top: 40px;
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* -------- 按钮 -------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  font-family: var(--font-head);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  border: 1px solid var(--border-hi);
  background: rgba(0, 240, 255, 0.06);
  color: var(--cyan);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.25s;
  text-transform: uppercase;
  position: relative;
  overflow: hidden;
}
.btn:hover {
  background: rgba(0, 240, 255, 0.15);
  box-shadow: var(--glow-cyan);
  transform: translateY(-2px);
  color: #fff;
}
.btn-primary {
  background: var(--grad-1);
  color: #0a0e1a;
  border-color: transparent;
}
.btn-primary:hover {
  filter: brightness(1.15);
  box-shadow: 0 0 40px rgba(0,240,255,0.5);
  color: #0a0e1a;
}
.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: rgba(255,255,255,0.2);
}

/* -------- 装饰角标 (Chinese tech hybrid) -------- */
.corner-frame {
  position: relative;
  display: inline-block;
  padding: 8px 16px;
}
.corner-frame::before, .corner-frame::after,
.corner-frame > .cf-tl, .corner-frame > .cf-br {
  content: '';
  position: absolute;
  width: 12px; height: 12px;
  border-color: var(--cyan);
  border-style: solid;
}
.corner-frame::before { top: 0; left: 0; border-width: 1px 0 0 1px; }
.corner-frame::after  { top: 0; right: 0; border-width: 1px 1px 0 0; }
.corner-frame > .cf-tl { bottom: 0; left: 0; border-width: 0 0 1px 1px; }
.corner-frame > .cf-br { bottom: 0; right: 0; border-width: 0 1px 1px 0; }

/* -------- 玻璃拟态卡片 -------- */
.glass {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  position: relative;
  transition: all 0.3s;
}
.glass:hover {
  border-color: var(--border-hi);
  background: var(--bg-card-hi);
  transform: translateY(-4px);
}
.glass-glow:hover {
  box-shadow: var(--glow-cyan);
}

/* -------- 网格布局 -------- */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

/* -------- Section 标题 -------- */
.section-title {
  text-align: center;
  margin-bottom: 56px;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.section-title .eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--cyan);
  letter-spacing: 0.15em;
  margin-bottom: 12px;
}
.section-title h2 {
  position: relative;
  display: inline-block;
  /* 不要 white-space: nowrap，nowrap + inline-block 会撑破容器；靠   + accent inline-block 防止换行丢色 */
  max-width: 100%;
}
.section-title h2::after {
  content: '';
  display: block;
  width: 60px; height: 2px;
  margin: 16px auto 0;
  background: var(--grad-1);
}
.section-title > p {
  margin-left: auto;
  margin-right: auto;
}

/* -------- 产品卡片 -------- */
.product-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
  text-decoration: none;
  color: inherit;
}
.product-card .pc-icon {
  width: 64px; height: 64px;
  filter: drop-shadow(0 0 12px rgba(0,240,255,0.4));
}
.product-card .pc-title {
  font-family: var(--font-head);
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
}
.product-card .pc-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--cyan);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.product-card .pc-desc { font-size: 0.95rem; }
.product-card .pc-arrow {
  margin-top: auto;
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.product-card .pc-arrow::after { content: ' →'; }

/* -------- 统计条 -------- */
.stat-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 24px;
  padding: 32px;
}
.stat-item .stat-num {
  font-family: var(--font-head);
  font-size: 2.5rem;
  font-weight: 900;
  color: #fff;
  line-height: 1;
}
.stat-item .stat-label {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-dim);
  letter-spacing: 0.05em;
}

/* -------- 技术栈 marquee -------- */
.marquee {
  overflow: hidden;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 24px 0;
  position: relative;
  mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
}
.marquee-track {
  display: flex;
  gap: 48px;
  width: max-content;
  animation: marquee 30s linear infinite;
}
.marquee-item {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  display: flex;
  align-items: center;
  gap: 8px;
}
.marquee-item::before {
  content: '◆';
  color: var(--cyan);
}
@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* -------- 页脚 -------- */
.footer {
  margin-top: 80px;
  padding: 48px 0 24px;
  border-top: 1px solid var(--border);
  background: rgba(5, 8, 16, 0.6);
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 32px;
  align-items: flex-start;
}
.footer-links { display: flex; gap: 24px; flex-wrap: wrap; }
.footer-links a { color: var(--text-dim); font-size: 0.9rem; }
.footer-links a:hover { color: var(--cyan); }
.footer-link-github { display: inline-flex; align-items: center; white-space: nowrap; }
.footer-meta {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-mute);
}

/* ===== ICP 备案信息 ===== */
/* 工信部规定：经营性/非经营性网站都必须在首页底部明示备案号，并链向 beian.miit.gov.cn。
   备案号下来前用占位符 + "备案申请中"徽章替代，避免空白影响美观。 */
.footer-icp {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 12px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-mute);
}
.footer-icp-link {
  color: var(--text-mute);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.footer-icp-link:hover { color: var(--cyan); }
.footer-icp-shield {
  display: inline-block;
  font-size: 0.95em;
  filter: grayscale(0.4);
  margin-right: 1px;
}
.footer-icp-number {
  display: inline-block;
  margin: 0 3px;
  padding: 0 4px;
  border-bottom: 1px dashed var(--orange);
  color: var(--orange);
  font-weight: 500;
  letter-spacing: 0.05em;
}
.footer-icp-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 10px;
  border: 1px solid var(--orange);
  border-radius: 999px;
  font-size: 0.7rem;
  color: var(--orange);
  letter-spacing: 0.06em;
}
.footer-icp-pulse {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--orange);
  animation: icp-pulse 2s ease-in-out infinite;
}
@keyframes icp-pulse {
  0%, 100% { opacity: 0.4; transform: scale(0.85); }
  50%      { opacity: 1;   transform: scale(1.15); }
}
@media (prefers-reduced-motion: reduce) {
  .footer-icp-pulse { animation: none; opacity: 0.8; }
}

/* ===== 2026-08-14 · Footer 合并样式 =====
   .footer-meta 从一行版权 + 一行 ICP 改为单行内联展示：
   版权 · 域名 · ICP · 公安备案
   .footer-beian 是 ICP / 公安链接通用样式（替代原 .footer-icp-link）
   .footer-sep 是行内分隔符
   .footer-beian-icon 是 18px SVG 图标（继承当前文字色） */
.footer-meta {
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px 10px;
}
.footer-sep {
  color: var(--text-mute);
  opacity: 0.4;
  margin: 0 2px;
  user-select: none;
}
.footer-beian {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--text-mute);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color 0.2s ease;
  font-family: var(--font-mono);
  font-size: 0.78rem;
}
.footer-beian:hover { color: var(--cyan); }
.footer-beian-icon {
  width: 16px;
  height: 16px;
  display: inline-block;
  opacity: 0.75;
  transition: opacity 0.2s ease;
}
.footer-beian:hover .footer-beian-icon { opacity: 1; }

/* -------- 特性块 (产品详情页用) -------- */
.feature {
  display: flex;
  gap: 16px;
  padding: 20px;
  border-left: 2px solid var(--cyan);
  background: rgba(0,240,255,0.04);
  border-radius: 0 8px 8px 0;
}
.feature-num {
  font-family: var(--font-mono);
  color: var(--cyan);
  font-size: 0.85rem;
  font-weight: 700;
  flex-shrink: 0;
}
.feature-content h4 { font-size: 1.1rem; margin-bottom: 6px; }
.feature-content p { font-size: 0.92rem; }

/* -------- 代码块 -------- */
.code-block {
  background: #050810;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text);
  overflow-x: auto;
  position: relative;
}
.code-block::before {
  content: '> _';
  position: absolute;
  top: 16px; right: 20px;
  color: var(--cyan);
  font-weight: 700;
  animation: blink 1s infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.code-block .k { color: var(--cyan); }
.code-block .s { color: var(--green); }
.code-block .c { color: var(--text-mute); font-style: italic; }

/* -------- 表单 -------- */
.form { display: flex; flex-direction: column; gap: 16px; max-width: 600px; }
.form label { font-family: var(--font-mono); font-size: 0.85rem; color: var(--cyan); letter-spacing: 0.05em; }
.form input, .form textarea {
  background: rgba(5, 8, 16, 0.6);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 16px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: all 0.2s;
}
.form input:focus, .form textarea:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0,240,255,0.15);
}
.form textarea { min-height: 140px; resize: vertical; }

/* -------- 揭示动画初始状态 (GSAP 控制) -------- */
.reveal { opacity: 0; transform: translateY(30px); }
.reveal-x { opacity: 0; transform: translateX(-30px); }

/* -------- 滚动条 -------- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-1); }
::-webkit-scrollbar-thumb { background: linear-gradient(var(--cyan), var(--purple)); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--cyan); }

/* -------- 响应式 -------- */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--nav-bg-scroll);
    backdrop-filter: blur(14px);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .section { padding: 64px 0; }
  .stat-num { font-size: 2rem; }
  .nav-admin-item { margin-left: 0; margin-top: 4px; padding-top: 12px; border-top: 1px solid var(--border); }
  .nav-admin-btn { align-self: flex-start; padding: 8px 16px !important; }
  .footer-admin-link { opacity: 0.75; }

  /* ===== 2026-08-20 · 移动端适配 =====
     历史：很多 inline 写的 120px 1fr 双列卡片 + 各种 hero 在 <768px 直接撑爆
     解决：媒体查询里强行降级为单列，玻璃 padding 收缩 */
  .glass { padding: 20px !important; }
  .hero-inner { padding: 0 16px; }
  .hero { padding: 100px 0 56px; }
  .container { padding: 0 16px; }
  /* inline grid 卡片降级为单列（index/products/研究页大量用到 120px 1fr） */
  [style*="grid-template-columns:120px"] { grid-template-columns: 1fr !important; gap: 16px !important; }
  [style*="grid-template-columns: 120px"] { grid-template-columns: 1fr !important; gap: 16px !important; }
  [style*="grid-template-columns:repeat(3,1fr)"],
  [style*="grid-template-columns:repeat(2,1fr)"] { grid-template-columns: 1fr !important; }
  /* 强制让 hero 内的 120px 图标在小屏缩为 80px，不至于和文字挤在一起 */
  [style*="width:120px"][style*="height:120px"] { width: 80px !important; height: 80px !important; }
  /* 标题 clamp 已经够了，但 h1 在小屏想更紧凑 */
  h1 { font-size: clamp(2rem, 8vw, 3rem); }
  /* 按钮在 360px 以下容易溢出 */
  .btn { padding: 12px 20px; font-size: 0.88rem; }
  .hero-cta { gap: 12px; }
  /* hero-logo 缩到手机合理大小 */
  .hero-logo { max-width: 360px; }
  /* marquee 字号 */
  .marquee-item { font-size: 0.88rem; }
  /* stat-bar 4 项在窄屏自动 2x2 */
  .stat-bar { grid-template-columns: repeat(2, 1fr); padding: 20px; gap: 16px; }
  /* 标题 hero-tag 内边距缩小 */
  .hero-tag { padding: 4px 12px; font-size: 0.72rem; }
  /* 移动端：导航内布局紧凑 */
  .nav-inner { gap: 8px; }
  /* 移动端：nav-links 隐藏 + 取消 auto margin；theme-toggle 推到最右 */
  .nav-links { display: none; margin-left: 0; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: inline-flex; }
  .theme-toggle { margin-left: auto; }
  /* 移动端 dropdown 不要 left:50% transform（避免错位） */
  .nav-links .dropdown-menu {
    position: static; transform: none; box-shadow: none;
    background: transparent; border: none; padding-left: 16px;
  }
  .nav-links .dropdown-menu::before { display: none; }
}

/* 中屏（768-1024）微调：内边距收一点避免文字贴边 */
@media (max-width: 1024px) and (min-width: 769px) {
  .container { padding: 0 20px; }
}

/* -------- 选择高亮 -------- */
::selection { background: var(--cyan); color: var(--bg-1); }

/* -------- 联系表单：honeypot + 状态条 -------- */
.hp-trap { position: absolute !important; left: -9999px !important; width: 1px !important; height: 1px !important; opacity: 0 !important; pointer-events: none !important; }
.contact-ok    { display: block; background: rgba(16, 185, 129, 0.12); border: 1px solid var(--green); color: var(--green); }
.contact-err   { display: block; background: rgba(239, 68, 68, 0.12);  border: 1px solid #ef4444; color: #ef4444; }

/* ===== 2026-08-20 · 主题切换按钮 =====
   2026-08-20 调整：放在整个 nav 的最右（nav-links 之后） */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--cyan);
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  transition: all 0.2s;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}
.theme-toggle:hover {
  background: rgba(0, 240, 255, 0.10);
  border-color: var(--border-hi);
  box-shadow: var(--glow-cyan);
}
.theme-toggle:active { transform: scale(0.94); }
/* 主题图标：默认全部隐藏，按 [data-theme] 显示对应那一个
   · 2026-08-25 强化：用 html[data-theme]（更标准）+ !important 避开老 CSS 缓存覆盖
   · 即便 data-theme 还没设上，至少显示一个 icon（不会空框） */
.theme-toggle .theme-icon-sun,
.theme-toggle .theme-icon-moon { display: none !important; }
.theme-toggle .theme-icon-sun { display: inline !important; }   /* 默认深色：显示太阳表"点我变亮" */
html[data-theme="light"] .theme-toggle .theme-icon-sun  { display: none !important; }
html[data-theme="light"] .theme-toggle .theme-icon-moon { display: inline !important; }
/* 桌面端 theme-toggle 跟在 nav-links 后面，无需 auto margin（已经在右侧）
   移动端 media 里加了 .theme-toggle { margin-left: auto } 推到最右 */

/* ===== 2026-08-20 · 亮色主题下的硬编码颜色覆盖 ===== */
:root[data-theme="light"] h1,
:root[data-theme="light"] h2,
:root[data-theme="light"] h3,
:root[data-theme="light"] h4,
:root[data-theme="light"] .product-card .pc-title,
:root[data-theme="light"] .stat-item .stat-num {
  color: var(--text);
}
:root[data-theme="light"] .glitch::before,
:root[data-theme="light"] .glitch::after { color: var(--text); }

/* ===== 2026-08-20 v3 · 亮色 logo 修复（修正 invert 用法） =====
   xynapse.png 是纯白 (255,255,255) / 透明底，白底白字 = 看不见。
   关键：filter: invert(1) 单用即可，白翻黑，alpha 不变（透明仍是透明）。
   教训：brightness(0) invert(1) 顺序错误！brightness(0) 先把白→黑，invert(1) 再把黑→白，
        两两抵消，filter 等于没加。
   hero-logo 链上 drop-shadow 让黑 logo 还带青/紫光晕（保留品牌感）。 */
:root[data-theme="light"] .nav-logo img,
:root[data-theme="light"] footer img[src*="xynapse"] {
  filter: invert(1);
}
:root[data-theme="light"] .hero-logo {
  filter:
    invert(1)
    drop-shadow(0 0 32px rgba(8, 145, 178, 0.45))
    drop-shadow(0 0 80px rgba(124, 58, 237, 0.35));
}

/* ===== 2026-08-20 v2 · 亮色背景装饰明显化 =====
   暗色模式的径向光晕/网格/扫描线在亮色模式要看得见，
   把不透明度从 0.04-0.08 提到 0.10-0.18，再加更柔和的青/紫双色调底色 */
:root[data-theme="light"] body {
  background: linear-gradient(180deg, #f0f6fb 0%, #ffffff 50%, #f6f0fb 100%);
}
:root[data-theme="light"] body::before {
  background:
    radial-gradient(ellipse at 20% 0%, rgba(8, 145, 178, 0.18) 0%, transparent 55%),
    radial-gradient(ellipse at 80% 100%, rgba(124, 58, 237, 0.16) 0%, transparent 55%),
    radial-gradient(circle at 50% 50%, rgba(236, 72, 153, 0.06) 0%, transparent 60%),
    linear-gradient(rgba(8, 145, 178, 0.10) 1px, transparent 1px) 0 0 / 60px 60px,
    linear-gradient(90deg, rgba(8, 145, 178, 0.10) 1px, transparent 1px) 0 0 / 60px 60px;
}
:root[data-theme="light"] body::after {
  background: repeating-linear-gradient(
    180deg,
    transparent 0,
    transparent 2px,
    rgba(124, 58, 237, 0.05) 2px,
    rgba(124, 58, 237, 0.05) 3px
  );
}

/* 玻璃拟态在亮色下需要更明显的边界和阴影 */
:root[data-theme="light"] .glass {
  background: var(--bg-card);
  border: 1px solid rgba(8, 145, 178, 0.20);
  box-shadow: var(--shadow-card);
}
:root[data-theme="light"] .glass:hover {
  border-color: var(--border-hi);
  background: var(--bg-card-hi);
}
:root[data-theme="light"] .feature {
  background: rgba(8, 145, 178, 0.06);
}
/* 表单输入亮色 */
:root[data-theme="light"] .form input,
:root[data-theme="light"] .form textarea,
:root[data-theme="light"] .code-block {
  background: rgba(255, 255, 255, 0.85);
  border-color: var(--border);
  color: var(--text);
}
:root[data-theme="light"] .form input:focus,
:root[data-theme="light"] .form textarea:focus {
  background: #fff;
}
/* footer-icp 数字占位在亮色下保留橙色焦点（badge 仍橙） */
:root[data-theme="light"] .footer { background: rgba(241, 245, 249, 0.7); }
/* 旗帜 pill 在亮色模式提亮边框对比 */
:root[data-theme="light"] .hero-tag { background: rgba(8, 145, 178, 0.10); }

/* -------- 选择高亮 -------- */
::selection { background: var(--cyan); color: var(--bg-1); }

/* -------- 联系表单：honeypot + 状态条 -------- */
.hp-trap { position: absolute !important; left: -9999px !important; width: 1px !important; height: 1px !important; opacity: 0 !important; pointer-events: none !important; }
.contact-ok    { display: block; background: rgba(16, 185, 129, 0.12); border: 1px solid var(--green); color: var(--green); }
.contact-err   { display: block; background: rgba(239, 68, 68, 0.12);  border: 1px solid #ef4444; color: #ef4444; }
/* -------- 中文短词不断行兜底（防 "认同方 / 向而来" 式错断） --------
   标题/副标题/卡片描述默认不在中文词中间断，仅在半角空格或标点处换行；
   text-wrap: balance 让多行尽量等长，避免最后一行只剩孤字。 */
h1, h2, h3, h4, h5,
.section-desc, .hero-subtitle, .feature p, .card p, .write-cta h2 {
  word-break: keep-all;
  text-wrap: balance;
  overflow-wrap: break-word;
}