/* ===================================================================
   中泓智能 GEO — 全站共享样式
   深色玻璃拟态设计系统
   =================================================================== */

/* ---------- 设计令牌 ---------- */
:root {
  --c-dark-900: #0a0e27;
  --c-dark-800: #111638;
  --c-dark-700: #1a1f3a;
  --c-primary:   #4f6ef7;
  --c-primary-300: #b794f4;
  --c-accent:    #00c9a7;
  --c-warning:   #f59e0b;

  --bg-gradient: linear-gradient(180deg, #0a0e27 0%, #1a1f3a 100%);
  --bg-gradient-diag: linear-gradient(135deg, #0a0e27 0%, #1a1f3a 100%);

  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-hover: rgba(255, 255, 255, 0.15);
  --glass-blur: blur(20px);

  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --text-tertiary: rgba(255, 255, 255, 0.5);
  --text-faint: rgba(255, 255, 255, 0.35);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.2s var(--ease);
  --transition: 0.3s var(--ease);
  --transition-slow: 0.6s ease-out;
}

/* ---------- 基础重置 ---------- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  background: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  min-height: 100vh;
}

/* ---------- 滚动条 ---------- */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--c-dark-900);
}
::-webkit-scrollbar-thumb {
  background: rgba(79, 110, 247, 0.4);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(79, 110, 247, 0.6);
}

/* ---------- 背景工具 ---------- */
.gradient-bg {
  background: var(--bg-gradient-diag);
  min-height: 100vh;
}

.bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  opacity: 0.15;
}

/* ---------- 玻璃拟态 ---------- */
.glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition), transform var(--transition);
}
.glass:hover {
  border-color: var(--glass-border-hover);
  transform: translateY(-2px);
}

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.glass-card:hover {
  border-color: var(--glass-border-hover);
}

/* ---------- 文字效果 ---------- */
.gradient-text {
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-300));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.accent-text {
  color: var(--c-accent);
}

.hero-title {
  letter-spacing: -0.02em;
}

.section-title {
  letter-spacing: -0.02em;
}

/* ---------- 按钮系统 ---------- */
.btn-primary {
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-300));
  box-shadow: 0 4px 24px rgba(79, 110, 247, 0.4);
  border: none;
  border-radius: var(--radius-md);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  transition: filter var(--transition), transform var(--transition), box-shadow var(--transition);
  padding: 14px 32px;
  display: inline-block;
  text-decoration: none;
}
.btn-primary:hover {
  filter: brightness(1.1);
  transform: scale(1.02);
  box-shadow: 0 6px 32px rgba(79, 110, 247, 0.5);
}

.btn-secondary {
  background: transparent;
  border-radius: var(--radius-md);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition);
  padding: 14px 32px;
  position: relative;
  text-decoration: none;
  display: inline-block;
}
.btn-secondary::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-md);
  padding: 1px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-300));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}
.btn-secondary:hover {
  background: linear-gradient(135deg, rgba(79, 110, 247, 0.15), rgba(183, 148, 244, 0.15));
}

.btn-accent {
  background: var(--c-accent);
  box-shadow: 0 4px 24px rgba(0, 201, 167, 0.35);
  border: none;
  border-radius: var(--radius-md);
  color: var(--c-dark-900);
  font-weight: 700;
  cursor: pointer;
  transition: filter var(--transition), transform var(--transition), box-shadow var(--transition);
  padding: 14px 32px;
  display: inline-block;
  text-decoration: none;
}
.btn-accent:hover {
  filter: brightness(1.1);
  transform: scale(1.02);
  box-shadow: 0 6px 32px rgba(0, 201, 167, 0.45);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  border: 1px solid rgba(79, 110, 247, 0.5);
  border-radius: var(--radius-sm);
  color: var(--c-primary);
  text-decoration: none;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.btn-outline:hover {
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-300));
  color: #fff;
  border-color: transparent;
}

.gradient-btn {
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-300));
  box-shadow: 0 4px 24px rgba(79, 110, 247, 0.4);
  transition: transform var(--transition), box-shadow var(--transition);
}
.gradient-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(79, 110, 247, 0.5);
}

/* ---------- 标签系统 ---------- */
.tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  background: rgba(0, 201, 167, 0.12);
  color: var(--c-accent);
  border: 1px solid rgba(0, 201, 167, 0.2);
}
.tag-blue   { background: rgba(79, 110, 247, 0.15); color: var(--c-primary); border-color: rgba(79, 110, 247, 0.25); }
.tag-purple { background: rgba(183, 148, 244, 0.15); color: var(--c-primary-300); border-color: rgba(183, 148, 244, 0.25); }
.tag-orange { background: rgba(255, 165, 0, 0.15); color: #ffa500; border-color: rgba(255, 165, 0, 0.25); }
.tag-pink   { background: rgba(255, 105, 180, 0.15); color: #ff69b4; border-color: rgba(255, 105, 180, 0.25); }
.tag-green  { background: rgba(0, 201, 167, 0.15); color: var(--c-accent); border-color: rgba(0, 201, 167, 0.25); }
.tag-teal   { background: rgba(20, 184, 166, 0.15); color: #14b8a6; border-color: rgba(20, 184, 166, 0.25); }

/* ---------- 导航栏 ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  transition: background var(--transition), backdrop-filter var(--transition), border-color var(--transition), padding var(--transition);
}
.navbar.scrolled {
  background: rgba(10, 14, 39, 0.9);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding: 10px 0;
}

.nav-blur {
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  background: rgba(10, 14, 39, 0.8);
}

.nav-active {
  color: #fff !important;
  position: relative;
}
.nav-active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-300));
  border-radius: 1px;
}

.nav-link {
  transition: color var(--transition-fast);
}

/* ---------- 移动端菜单（全屏覆盖式） ---------- */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 14, 39, 0.97);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  z-index: 150;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
}
.mobile-menu.open {
  display: flex;
}

/* 兼容 cases-list / media-list 旧下拉式菜单 */
.mobile-menu.active {
  display: block;
}

.hamburger {
  display: none;
}

/* ---------- 动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 4px 24px rgba(79, 110, 247, 0.4); }
  50%      { box-shadow: 0 4px 40px rgba(79, 110, 247, 0.7); }
}
.pulse-cta {
  animation: pulse-glow 2.5s ease-in-out infinite;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------- 布局 ---------- */
.section-padding {
  padding: 100px 0;
}

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  top: 80px;
  right: 20px;
  z-index: 200;
  padding: 16px 24px;
  border-radius: var(--radius-md);
  background: rgba(0, 201, 167, 0.15);
  border: 1px solid rgba(0, 201, 167, 0.3);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  color: var(--c-accent);
  font-weight: 500;
  transform: translateX(120%);
  transition: transform 0.4s var(--ease);
}
.toast.show {
  transform: translateX(0);
}

/* ---------- 卡片组件 ---------- */
.case-card {
  transition: transform var(--transition), border-color var(--transition);
}
.case-card:hover {
  transform: translateY(-4px);
  border-color: rgba(79, 110, 247, 0.3);
}
.case-card.hidden {
  display: none;
}

.news-card {
  transition: transform var(--transition), border-color var(--transition);
}
.news-card:hover {
  transform: translateY(-4px);
  border-color: rgba(79, 110, 247, 0.3);
}

/* ---------- 筛选按钮 ---------- */
.filter-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.6);
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.filter-btn:hover,
.filter-btn.active {
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-300));
  border-color: transparent;
  color: #fff;
}

/* ---------- 表单 ---------- */
input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(79, 110, 247, 0.2);
}

/* ---------- 时间线（about.html 专用） ---------- */
.timeline-line {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--c-primary), var(--c-accent));
  transform: translateX(-50%);
}

/* ---------- 兼容旧导航结构 ---------- */
.desktop-nav { /* cases-list / media-list 使用 */ }
.mobile-toggle { display: none; }

/* ---------- 响应式断点 ---------- */
@media (max-width: 768px) {
  .hero-title { font-size: 28px !important; }
  .section-title { font-size: 26px !important; }
  .section-padding { padding: 60px 0; }
  .nav-links,
  .nav-buttons { display: none !important; }
  .hamburger { display: flex !important; }
  .hero-form-sticky { position: relative !important; top: auto !important; }
  .timeline-line { left: 20px; }
  .desktop-nav { display: none !important; }
  .mobile-toggle { display: block !important; }
}

@media (max-width: 1024px) {
  .hero-form-sticky { position: relative !important; top: auto !important; }
}

/* ---------- 可访问性 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}