:root {
  /* 核心基调：明亮、精密、建筑感 + 科技活力 */
  --bg-page: #F5F7FA;
  --bg-surface: #FFFFFF;
  --bg-surface-hover: #F8FAFC;
  
  /* 边框体系 */
  --border-base: #E2E8F0;
  --border-highlight: #3B82F6;
  
  /* 文字系统：增加深蓝调，减少纯黑的生硬感 */
  --text-primary: #0F172A; /* Slate 900 */
  --text-secondary: #475569; /* Slate 600 */
  --text-tertiary: #94A3B8; /* Slate 400 */
  --text-invert: #FFFFFF;

  /* 品牌色体系 */
  --accent: #2563EB; /* 更深邃的蓝 */
  --accent-hover: #1D4ED8;
  --accent-gradient: linear-gradient(135deg, #2563EB 0%, #0EA5E9 100%); /* 蓝-天蓝渐变 */
  --secondary: #F59E0B; /* 琥珀色作为点缀 */
  
  /* 质感参数 */
  --radius-lg: 24px; /* 更圆润 */
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-glow: 0 0 20px rgba(37, 99, 235, 0.15); /* 蓝色辉光 */
  
  --font-sans: "Inter", system-ui, -apple-system, sans-serif;
  --max-width: 1280px;
}

* { box-sizing: border-box; }
html { 
  scroll-behavior: smooth; 
  color-scheme: light; 
  overflow-y: scroll; /* 强制显示滚动条槽，彻底解决页面切换跳动 */
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  /* 科技感背景：柔和的径向渐变叠加网格 */
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(37, 99, 235, 0.05) 0%, transparent 60%),
    linear-gradient(rgba(0, 0, 0, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 0, 0, 0.02) 1px, transparent 1px);
  background-size: 100% 100%, 40px 40px, 40px 40px;
  background-position: center top;
  background-attachment: fixed; /* 背景固定，更有质感 */
}

/* 顶部光影：极淡的顶部白光 */
body::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; height: 400px;
  background: linear-gradient(180deg, #FFFFFF 0%, rgba(245,247,250,0) 100%);
  pointer-events: none;
  z-index: -1;
}

/* 隐藏之前的装饰元素 */
.orbs, .orb, .noise { display: none !important; }

a { color: inherit; text-decoration: none; transition: 0.2s; }
img { max-width: 100%; display: block; }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 40px; }

/* --- 导航栏：纯白磨砂 --- */
.topbar {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-base);
  min-height: 72px;
  display: flex; align-items: center;
}

body.admin-bar .topbar { top: 32px; }
@media screen and (max-width: 782px) {
  body.admin-bar .topbar { top: 46px; }
}

/* 顶部导航单独放宽容器限制，让Logo向左移但保留边距 */
.topbar .container {
  max-width: 100%;
  padding: 0 24px; /* 向左移动，保留适度呼吸感 */
}

.nav { width: 100%; display: flex; align-items: center; gap: 32px; }

.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand > div:not(.brand-mark) {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  white-space: normal;
}
.brand-mark {
  width: 32px; height: 32px; border-radius: 8px;
  background: var(--accent-gradient); /* 品牌渐变 */
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}
.brand-name { font-weight: 700; font-size: 18px; letter-spacing: -0.5px; color: var(--text-primary); white-space: nowrap; }
.brand-sub { font-size: 12px; color: var(--text-secondary); margin-top: 0; white-space: nowrap; }

.nav-links { display: flex; gap: 32px; flex: 1; justify-content: center; min-width: 0; flex-wrap: nowrap; }
.nav-links::-webkit-scrollbar { display: none; }

.nav-links a {
  font-size: 15px; font-weight: 500; color: var(--text-secondary);
  transition: 0.2s;
  white-space: nowrap;
  padding: 8px 0;
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform 0.2s ease;
}
.nav-links a:hover, .nav-links a.active { color: var(--text-primary); }
.nav-links a:hover::after, .nav-links a.active::after { transform: scaleX(1); }

/* 不需要菜单按钮 */
.mobile-toggle { display: none !important; }

@media (max-width: 1024px) {
  .nav { gap: 20px; }
  .nav-links { gap: 20px; justify-content: flex-start; overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
  .nav-links::-webkit-scrollbar { display: none; }
}
@media (max-width: 768px) {
  .topbar .container { padding: 0 16px; }
  .nav-links { gap: 16px; }
  .nav-links a { font-size: 14px; }
}

/* --- 按钮：清晰、有力 --- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0 24px; height: 42px; /* 更高一点，更大气 */
  font-size: 15px; font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer; transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid var(--border-base);
  background: var(--bg-surface); color: var(--text-primary);
  line-height: 1;
  font-family: inherit;
  white-space: nowrap;
  -webkit-appearance: none;
  appearance: none;
  box-shadow: var(--shadow-sm);
}
.btn:hover { 
  border-color: var(--border-highlight); 
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  color: var(--accent);
}

.btn.primary {
  border: none;
  background: var(--accent-gradient);
  color: var(--text-invert);
  box-shadow: 0 4px 6px -1px rgba(37, 99, 235, 0.3), 0 2px 4px -1px rgba(37, 99, 235, 0.2);
}
.btn.primary:hover { 
  background: linear-gradient(135deg, #1D4ED8 0%, #0284C7 100%);
  transform: translateY(-2px);
  box-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.4);
  color: #fff;
}

.btn.ghost { border: none; color: var(--text-secondary); background: transparent; box-shadow: none; }
.btn.ghost:hover { color: var(--text-primary); background: rgba(0,0,0,0.05); }

/* --- Hero Banner 区域 (新版) --- */
.hero-banner {
  position: relative;
  width: 100%;
  height: 640px; /* 大气的高度 */
  display: flex;
  align-items: center;
  overflow: hidden;
  margin-top: -72px; /* 抵消导航栏高度，实现沉浸式 */
  padding-top: 72px;
  background: #0F172A; /* 默认深色底 */
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
}

/* 模拟图片占位 */
.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: 
    radial-gradient(circle at 70% 30%, rgba(37, 99, 235, 0.15) 0%, transparent 50%),
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 100% 100%, 60px 60px, 60px 60px;
  opacity: 0.6;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(15, 23, 42, 0.9) 0%, rgba(15, 23, 42, 0.7) 50%, rgba(15, 23, 42, 0.4) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 10;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
  color: #fff;
  /* 改为双列布局 */
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 60px;
}

.hero-text-box {
  max-width: 600px;
  flex: 1;
}

/* 右侧视觉占位 */
.hero-visual {
  flex: 1;
  max-width: 500px;
  height: 400px;
  /* background: rgba(255, 255, 255, 0.05); */
  /* border: 1px solid rgba(255, 255, 255, 0.1); */
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  /* backdrop-filter: blur(10px); */
  overflow: hidden; /* 确保图片圆角 */
  box-shadow: var(--shadow-lg); /* 增加阴影提升质感 */
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* .hero-visual::after {
  content: "公司照片 / 团队合影预留位";
  color: rgba(255,255,255,0.5);
  font-size: 14px;
} */

.hero-title {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 800;
  line-height: 1.15;
  margin: 0 0 28px;
  letter-spacing: -1.5px;
  color: #fff;
}

.hero-desc {
  font-size: clamp(16px, 2vw, 18px);
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 40px;
  max-width: 520px;
  font-weight: 400;
}

.hero-actions {
  display: flex;
  gap: 20px; /* 增加按钮间距 */
  flex-wrap: wrap;
}


/* --- 数据条 --- */
.stats-bar {
  position: relative;
  z-index: 20;
  margin-top: -60px; /* 上浮叠加在 Banner 上 */
  margin-bottom: 60px;
}

.stats-container {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.1);
  padding: 40px;
  display: flex;
  justify-content: space-around;
  align-items: center;
  border: 1px solid var(--border-base);
  max-width: var(--max-width);
  margin: 0 auto; /* 居中 */
  width: calc(100% - 80px); /* 留边距 */
}

.stats-item {
  text-align: center;
}

.stats-num {
  font-size: clamp(32px, 4vw, 40px);
  font-weight: 800;
  color: var(--accent);
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 8px;
  display: block;
}

.stats-label {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.stats-divider {
  width: 1px;
  height: 60px;
  background: var(--border-base);
}

@media (max-width: 900px) {
  .hero-banner { height: auto; min-height: 500px; padding: 120px 0 60px; margin-top: 0; }
  .hero-overlay { background: rgba(15, 23, 42, 0.85); }
  .hero-title { font-size: 40px; }
  .stats-bar { margin-top: 0; padding: 0 20px; margin-bottom: 40px; }
  .stats-container {
    flex-direction: column;
    gap: 30px;
    width: 100%;
    padding: 30px;
  }
  .stats-divider { display: none; }
}

/* --- 恢复被误删的通用样式 (用于内页) --- */
.hero-card {
  background: transparent;
  border: none;
  padding: 0;
  margin-top: 50px;
  max-width: none;
  text-align: center;
}
/* 内页居中对齐按钮组 */
.hero-card .hero-actions {
  justify-content: center;
}

.hero-main {
  max-width: 800px;
  margin: 0 auto;
}

.kicker {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; letter-spacing: 0.5px;
  color: var(--accent); 
  background: rgba(37, 99, 235, 0.1);
  padding: 6px 16px; border-radius: 100px;
  margin-bottom: 24px;
  border: 1px solid rgba(37, 99, 235, 0.1);
}
.kicker-dot { width: 8px; height: 8px; background: var(--accent); border-radius: 50%; box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2); }

.lead {
  font-size: 18px; line-height: 1.6; color: var(--text-secondary);
  margin-bottom: 40px; max-width: 600px; font-weight: 400;
  margin-left: auto; margin-right: auto; /* 确保在居中容器内居中 */
}

/* 兼容原有样式 */
.kicker.white {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.2);
}
.kicker.white .kicker-dot { background: #fff; box-shadow: none; }

/* 右侧边栏 */
.side-grid { display: flex; flex-direction: column; gap: 16px; }
.side-tile {
  background: var(--bg-surface);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-md);
  padding: 24px; transition: 0.3s;
  box-shadow: var(--shadow-sm);
  position: relative;
}

/* --- 首页透明导航栏适配 --- */
.topbar.transparent-nav {
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border-bottom-color: transparent;
  transition: all 0.3s ease;
}

/* 默认状态（透明背景，白字） */
.topbar.transparent-nav:not(.scrolled) .brand-name,
.topbar.transparent-nav:not(.scrolled) .brand-sub,
.topbar.transparent-nav:not(.scrolled) .nav-links a {
  color: rgba(255,255,255,0.9);
  text-shadow: 0 1px 4px rgba(0,0,0,0.3);
}

.topbar.transparent-nav:not(.scrolled) .nav-links a:hover,
.topbar.transparent-nav:not(.scrolled) .nav-links a.active {
  color: #fff;
  opacity: 1;
}

.topbar.transparent-nav:not(.scrolled) .btn.ghost {
  color: #fff;
  border-color: rgba(255,255,255,0.2);
}
.topbar.transparent-nav:not(.scrolled) .btn.ghost:hover {
  background: rgba(255,255,255,0.1);
  border-color: #fff;
}

/* 滚动后状态（恢复白底黑字） */
.topbar.transparent-nav.scrolled {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--border-base);
  box-shadow: var(--shadow-sm);
}

/* 覆盖回深色文字 */
.topbar.transparent-nav.scrolled .brand-name { color: var(--text-primary); text-shadow: none; }
.topbar.transparent-nav.scrolled .brand-sub { color: var(--text-secondary); text-shadow: none; }
.topbar.transparent-nav.scrolled .nav-links a { color: var(--text-secondary); text-shadow: none; }
.topbar.transparent-nav.scrolled .nav-links a:hover,
.topbar.transparent-nav.scrolled .nav-links a.active { color: var(--text-primary); }
.topbar.transparent-nav.scrolled .btn.ghost { color: var(--text-secondary); border-color: transparent; }
.topbar.transparent-nav.scrolled .btn.ghost:hover { color: var(--text-primary); background: rgba(0,0,0,0.05); }
.side-tile:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
  z-index: 10;
}
.side-title { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; font-weight: 600; font-size: 16px; color: var(--text-primary); }
.side-tile p { font-size: 14px; color: var(--text-secondary); margin: 0; line-height: 1.5; }
.badge {
  font-size: 11px; padding: 4px 8px; border-radius: 4px;
  background: #FFF7ED; color: #D97706; /* 暖色调标签，形成对比 */
  font-weight: 600;
  border: 1px solid #FFEDD5;
}

/* --- 通用板块 --- */
.section { padding: 80px 0; border-top: 1px solid var(--border-base); }
.section:first-of-type { border-top: none; }
.section-head { margin-bottom: 48px; display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; flex-wrap: wrap; }
.section-head h2 { font-size: clamp(24px, 3vw, 32px); font-weight: 700; margin: 0 0 12px; letter-spacing: -0.5px; color: var(--text-primary); }
.section-head p { color: var(--text-secondary); font-size: 15px; max-width: 480px; margin: 0; line-height: 1.6; }

.grid { display: grid; gap: 24px; }
.grid.cols-3 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.grid.cols-2 { grid-template-columns: repeat(auto-fit, minmax(480px, 1fr)); }

/* --- 卡片：干净白底 --- */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-lg);
  padding: 32px; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-sm);
  position: relative; overflow: hidden;
}
.card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.card h3 { font-size: 20px; font-weight: 700; margin: 0 0 12px; color: var(--text-primary); }
.card p { font-size: 14px; line-height: 1.6; color: var(--text-secondary); margin: 0; }

.card-topline { display: flex; justify-content: space-between; margin-bottom: 24px; align-items: center; }
.pill {
  font-size: 11px; font-weight: 700; color: var(--accent);
  text-transform: uppercase; letter-spacing: 0.5px;
  background: rgba(37, 99, 235, 0.08); padding: 4px 10px; border-radius: 6px;
  border: 1px solid rgba(37, 99, 235, 0.1);
}
.divider { height: 1px; background: linear-gradient(90deg, var(--border-base) 0%, transparent 100%); margin: 24px 0; }

/* --- 案例卡片 --- */
.case-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(350px, 1fr)); gap: 32px; }
.case {
  background: var(--bg-surface);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-lg);
  overflow: hidden; transition: 0.3s;
  display: flex; flex-direction: column;
  box-shadow: var(--shadow-sm);
}
.case:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--accent); }
.case-media {
  aspect-ratio: 16/10; background: #E5E5EA; position: relative;
}
/* 模拟浅色占位图 */
.case-media { background: linear-gradient(135deg, #F2F2F7 0%, #E5E5EA 100%); }

.case-body { padding: 24px; }
.case-title { font-size: 18px; font-weight: 700; margin: 0 0 8px; color: var(--text-primary); }
.case-meta { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }
.tag {
  font-size: 12px; padding: 4px 10px; border-radius: 100px;
  background: #F2F4F7; color: var(--text-secondary);
  font-weight: 500;
}

/* --- 筛选器 --- */
.filters { display: flex; gap: 8px; margin-bottom: 40px; flex-wrap: wrap; justify-content: center;}
.chip {
  background: var(--bg-surface); border: 1px solid var(--border-base);
  color: var(--text-secondary); padding: 8px 20px; border-radius: 100px;
  cursor: pointer; transition: 0.2s; font-size: 14px; font-weight: 500;
  box-shadow: var(--shadow-sm);
}
.chip:hover { border-color: var(--accent); color: var(--accent); }
.chip.active { background: var(--text-primary); color: #fff; border-color: var(--text-primary); }

/* --- 内页通用 Banner (新版) --- */
.inner-banner {
  position: relative;
  width: 100%;
  height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-top: -72px; /* 抵消导航栏高度 */
  padding-top: 72px;
  background: #0F172A;
  margin-bottom: 80px;
}

.inner-banner .hero-bg { opacity: 0.8; } /* 复用 hero-bg 但稍微亮一点或保持一致 */

.inner-banner-content {
  position: relative;
  z-index: 10;
  text-align: center;
  color: #fff;
  max-width: 800px;
  padding: 0 24px;
}

.inner-banner h1 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  margin: 0 0 16px;
  letter-spacing: -0.5px;
  color: #fff;
}

.inner-banner p {
  font-size: clamp(14px, 2vw, 16px);
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.8);
  max-width: 560px;
  margin: 0 auto;
}

@media (max-width: 768px) {
  .inner-banner { height: 280px; margin-bottom: 48px; padding-top: 60px; margin-top: -60px; }
  .hero-content { flex-direction: column; gap: 40px; text-align: center; }
  .hero-text-box { max-width: 100%; }
  .hero-visual { max-width: 300px; height: 220px; }
}

/* 废弃旧版 page-title，保留以防万一，但覆盖它 */
.page-title { display: none; }

/* --- 关键修复：弹窗 (Modal) --- */
.modal {
  position: fixed; inset: 0; z-index: 999;
  background: rgba(0,0,0,0.4); backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  padding: 20px; opacity: 0; pointer-events: none; transition: 0.2s;
}
.modal.open { opacity: 1; pointer-events: all; }

.modal-card {
  background: var(--bg-surface); width: 100%; max-width: 800px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  /* 修复：增加最大高度和滚动条，防止小屏幕显示不全 */
  max-height: 90vh;
  display: flex; flex-direction: column;
}

.modal-head {
  padding: 16px 24px; border-bottom: 1px solid var(--border-base);
  display: flex; justify-content: space-between; align-items: center;
  flex-shrink: 0; /* 防止头部被压缩 */
  background: var(--bg-surface);
}
.modal-head strong { font-size: 16px; font-weight: 700; }

.modal-body {
  padding: 24px;
  overflow-y: auto; /* 允许内容区域滚动 */
  overscroll-behavior: contain;
}

.modal-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 32px; }
@media(max-width: 768px) { .modal-grid { grid-template-columns: 1fr; gap: 24px; } }

.form .field { margin-bottom: 16px; }
.label { display: block; font-size: 13px; color: var(--text-secondary); margin-bottom: 6px; font-weight: 600; }
.input, .select, .textarea {
  width: 100%; background: #FAFAFC;
  border: 1px solid var(--border-base); border-radius: var(--radius-sm);
  padding: 10px 12px; color: var(--text-primary); font-family: inherit; font-size: 14px;
  transition: 0.2s;
}
.input:focus, .select:focus, .textarea:focus {
  border-color: var(--accent); outline: none; background: #fff;
  box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}
.textarea { height: 80px; resize: none; }
.hint { font-size: 12px; color: var(--text-tertiary); margin-top: 6px; }

/* --- 底部 --- */
.footer {
  border-top: 1px solid var(--border-base);
  background: #FAFAFC; padding: 80px 0 40px; margin-top: 0;
}
.footer-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; }
.kv { display: grid; gap: 24px; grid-template-columns: repeat(2, 1fr); margin-bottom: 32px; }
.kv .item strong { display: block; color: var(--text-primary); font-size: 15px; margin-bottom: 4px; }
.kv .item span { font-size: 12px; color: var(--text-tertiary); text-transform: uppercase; }

/* --- 浮动操作 --- */
.float-actions {
  position: fixed; right: 24px; bottom: 24px; z-index: 90;
  display: flex; flex-direction: column; gap: 12px;
}
.fab {
  width: 52px; height: 52px; border-radius: 50%;
  padding: 0; box-shadow: var(--shadow-lg);
  background: var(--bg-surface); border: 1px solid var(--border-base);
  color: var(--text-primary); display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 600; cursor: pointer; transition: 0.25s ease;
}
.fab:hover { transform: translateY(-3px) scale(1.05); box-shadow: 0 12px 24px -8px rgba(0,0,0,0.2); }
.fab.primary { background: var(--accent-gradient); color: #fff; border: none; box-shadow: 0 8px 20px -4px rgba(37, 99, 235, 0.4); }
.fab.primary:hover { box-shadow: 0 12px 28px -4px rgba(37, 99, 235, 0.5); }

/* Toast */
.toast {
  position: fixed; bottom: 32px; left: 50%; transform: translate(-50%, 20px);
  background: var(--text-primary); color: #fff;
  padding: 10px 24px; border-radius: 100px;
  font-size: 14px; font-weight: 600; box-shadow: var(--shadow-lg);
  opacity: 0; transition: 0.3s; pointer-events: none;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* 移动端适配 */
@media(max-width: 768px) {
  .container { padding: 0 20px; }
  .brand-sub { display: none; }
  .btn { height: 40px; padding: 0 18px; font-size: 14px; }
  .grid.cols-2 { grid-template-columns: 1fr; }
  .grid.cols-3 { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
  .section-head { margin-bottom: 32px; }
  .card { padding: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 40px; }
}