/* ===== EdgeCube 公共样式（可复用） ===== */

:root {
  --ec-bg: #0a0e1a;
  --ec-bg-soft: #111726;
  --ec-accent: #4CAF50;
  --ec-accent-2: #2E7D32;
  --ec-text: #e6ecf5;
  --ec-text-muted: #8a93a6;
  --ec-border: rgba(76, 175, 80, 0.15);
  --ec-navbar-height: 64px;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--ec-bg);
  color: var(--ec-text);
  font-family: "Segoe UI", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
  padding-top: var(--ec-navbar-height);
}

/* 整页滚动吸附区块标记，滚动对齐时避开导航栏 */
.ec-snap {
  scroll-snap-align: start;
  scroll-snap-stop: always;
  scroll-margin-top: var(--ec-navbar-height);
}

/* ===== 顶部导航栏 ===== */
.ec-navbar {
  background: rgba(10, 14, 26, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--ec-border);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4), 0 0 1px rgba(76, 175, 80, 0.2) inset;
  padding-top: 0.65rem;
  padding-bottom: 0.65rem;
}

.ec-brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
}

.ec-brand img {
  width: 36px;
  height: 36px;
  object-fit: contain;
  filter: drop-shadow(0 0 6px rgba(76, 175, 80, 0.55));
}

.ec-brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  background: linear-gradient(90deg, #ffffff 0%, var(--ec-accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.ec-nav-link {
  color: var(--ec-text-muted) !important;
  font-weight: 500;
  font-size: 0.98rem;
  padding: 0.5rem 1rem !important;
  position: relative;
  transition: color 0.2s ease;
}

.ec-nav-link::after {
  content: "";
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: 0.25rem;
  height: 2px;
  background: linear-gradient(90deg, var(--ec-accent), var(--ec-accent-2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
  border-radius: 2px;
}

.ec-nav-link:hover,
.ec-nav-link.active {
  color: var(--ec-text) !important;
}

.ec-nav-link:hover::after,
.ec-nav-link.active::after {
  transform: scaleX(1);
}

/* ===== 下载按钮（通用） ===== */
.ec-download-btn {
  position: relative;
  background: linear-gradient(135deg, var(--ec-accent) 0%, var(--ec-accent-2) 100%);
  color: #06140a !important;
  font-weight: 700;
  padding: 0.55rem 1.6rem !important;
  border-radius: 10px;
  border: none;
  text-decoration: none;
  box-shadow: 0 0 0 1px rgba(76, 175, 80, 0.35), 0 6px 20px rgba(76, 175, 80, 0.28);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  white-space: nowrap;
}

.ec-download-btn:hover {
  color: #06140a !important;
  transform: translateY(-1px);
  box-shadow: 0 0 0 1px rgba(76, 175, 80, 0.55), 0 8px 26px rgba(76, 175, 80, 0.45);
}

/* 移动端折叠按钮 */
.ec-toggler {
  border-color: rgba(76, 175, 80, 0.3);
}

.ec-toggler:focus {
  box-shadow: 0 0 0 0.2rem rgba(76, 175, 80, 0.25);
}

/* ===== 区段标题（可复用） ===== */
.ec-section-head {
  margin-bottom: 3.5rem;
}

.ec-eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 4px;
  color: var(--ec-accent);
  padding: 0.35rem 0.9rem;
  border: 1px solid rgba(76, 175, 80, 0.35);
  border-radius: 999px;
  background: rgba(76, 175, 80, 0.08);
  margin-bottom: 1.1rem;
}

.ec-section-title {
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  font-weight: 800;
  margin-bottom: 0.85rem;
  background: linear-gradient(180deg, #ffffff 0%, #b8c4d4 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.ec-section-sub {
  color: var(--ec-text-muted);
  font-size: 1.05rem;
  max-width: 620px;
  margin: 0 auto;
}

.ec-section-head.center {
  text-align: center;
}