/* 栈堆智能科技 - 全站通用炫酷风格 */
:root {
  --bg-dark: #0f0f23;
  --accent: #00d4aa;
  --accent-glow: rgba(0, 212, 170, 0.4);
  --purple: #7c3aed;
  --blue: #3b82f6;
  --text: #e2e8f0;
  --text-muted: #94a3b8;
}
* {
  box-sizing: border-box;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
/* 隐藏全站滚动条：用 .page-scroll 作为唯一滚动区并隐藏其滚动条 */
html { scroll-behavior: smooth; height: 100%; }
html::-webkit-scrollbar,
body::-webkit-scrollbar,
*::-webkit-scrollbar { display: none !important; width: 0 !important; height: 0 !important; }
body {
  font-family: "Noto Sans SC", -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  margin: 0;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg-dark);
  min-height: 100vh;
  overflow-x: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.page-scroll {
  min-height: 100vh;
  overflow-x: hidden;
  overflow-y: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  -webkit-overflow-scrolling: touch;
}
.page-scroll::-webkit-scrollbar { display: none !important; width: 0 !important; height: 0 !important; }
.bg-wrap {
  position: fixed;
  inset: 0;
  z-index: -1;
  background: radial-gradient(ellipse 80% 50% at 50% -20%, rgba(124, 58, 237, 0.2), transparent),
              radial-gradient(ellipse 60% 40% at 100% 50%, rgba(0, 212, 170, 0.1), transparent),
              radial-gradient(ellipse 50% 30% at 0% 80%, rgba(59, 130, 246, 0.12), transparent);
}
.grid-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image: linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black, transparent);
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 15, 35, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: 0.85rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.site-logo {
  font-weight: 900;
  font-size: 1.25rem;
  background: linear-gradient(135deg, var(--accent), var(--purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  letter-spacing: 0.02em;
}
.site-nav { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.site-nav a {
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.5rem 0.9rem;
  border-radius: 8px;
  font-weight: 500;
  transition: color 0.2s, background 0.2s, box-shadow 0.2s;
}
.site-nav a:hover {
  color: var(--accent);
  background: rgba(0, 212, 170, 0.08);
  box-shadow: 0 0 20px var(--accent-glow);
}
.page-hero {
  padding: 3rem 2rem 2.5rem;
  text-align: center;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.page-hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 800;
  margin: 0 0 0.5rem;
  background: linear-gradient(135deg, #fff, var(--text-muted));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.page-hero p { margin: 0; color: var(--text-muted); font-size: 1rem; }
.main-wrap { max-width: 900px; margin: 0 auto; padding: 2.5rem 2rem; }
.main-wrap h2 {
  font-size: 1.35rem;
  font-weight: 700;
  color: #fff;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}
.main-wrap p, .main-wrap li { color: var(--text-muted); }
.main-wrap a { color: var(--accent); text-decoration: none; }
.main-wrap a:hover { text-decoration: underline; }
.site-footer {
  margin-top: 3rem;
  padding: 2rem;
  text-align: center;
  background: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.25));
  border-top: 1px solid rgba(255,255,255,0.06);
}
.site-footer p { margin: 0; color: var(--text-muted); font-size: 0.9rem; }
.site-footer a { color: var(--accent); }
.glow-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.glow-card h2 { margin-top: 0; color: #fff; font-size: 1.2rem; }
.glow-card:hover {
  border-color: rgba(0, 212, 170, 0.2);
  box-shadow: 0 0 30px var(--accent-glow);
}
/* 产品/解决方案块 */
.product-block, .solution-block {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1.25rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.product-block:hover, .solution-block:hover {
  border-color: rgba(0, 212, 170, 0.2);
  box-shadow: 0 0 24px var(--accent-glow);
}
.product-block h2, .solution-block h2 { margin-top: 0; color: #fff; font-size: 1.2rem; }
/* 价格卡片 */
.plans { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.5rem; margin-top: 2rem; }
.plan-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 2rem;
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}
.plan-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 212, 170, 0.25);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3), 0 0 32px var(--accent-glow);
}
.plan-card h3 { color: #fff; margin-top: 0; font-size: 1.2rem; }
.plan-card .price { font-size: 1.5rem; font-weight: 800; background: linear-gradient(135deg, var(--accent), var(--purple)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.plan-card p { color: var(--text-muted); margin: 0.5rem 0; font-size: 0.95rem; }
.plan-card a { color: var(--accent); font-weight: 500; }
/* 联系块 */
.contact-block {
  background: rgba(255, 255, 255, 0.03);
  border-left: 4px solid var(--accent);
  border-radius: 0 12px 12px 0;
  padding: 1.25rem 1.5rem;
  margin: 1.25rem 0;
  transition: box-shadow 0.2s;
}
.contact-block:hover { box-shadow: 0 0 24px var(--accent-glow); }
.contact-block strong { color: #fff; }
/* 表单 */
.main-wrap input, .main-wrap textarea {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  padding: 0.75rem 1rem;
  color: var(--text);
  font-size: 1rem;
  width: 100%;
  max-width: 420px;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.main-wrap input:focus, .main-wrap textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.main-wrap label { display: block; margin-top: 1rem; color: var(--text-muted); font-size: 0.9rem; }
.main-wrap button[type="submit"] {
  margin-top: 1.25rem;
  padding: 0.75rem 1.75rem;
  background: linear-gradient(135deg, var(--accent), #00a884);
  color: #0f0f23;
  border: none;
  border-radius: 10px;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}
.main-wrap button[type="submit"]:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--accent-glow);
}
/* 资讯列表 */
.article-list { list-style: none; padding: 0; margin: 0; }
.article-list li {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.article-list li:hover {
  border-color: rgba(0, 212, 170, 0.2);
  box-shadow: 0 0 24px var(--accent-glow);
}
.article-list a { color: #fff; font-weight: 600; text-decoration: none; }
.article-list a:hover { color: var(--accent); text-decoration: underline; }
.article-meta { color: var(--text-muted); font-size: 0.875rem; margin-top: 0.35rem; }
.article-list p { margin: 0.5rem 0 0; color: var(--text-muted); font-size: 0.95rem; }