/* huisaner.com — 极简单页样式 */
:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --text: #17202e;
  --muted: #5d6b7e;
  --border: #e3e9f1;
  --accent: #3b82f6;
  --accent-2: #8b5cf6;
  --shadow: 0 8px 30px rgba(23, 32, 46, 0.08);
  --header-bg: rgba(246, 248, 251, 0.8);
}

html[data-theme="dark"] {
  --bg: #0b0f16;
  --surface: #121824;
  --text: #e7ebf2;
  --muted: #93a0b4;
  --border: #1f2937;
  --accent: #60a5fa;
  --accent-2: #a78bfa;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
  --header-bg: rgba(11, 15, 22, 0.8);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background 0.3s, color 0.3s;
}

.container { max-width: 720px; margin: 0 auto; padding: 0 24px; }

a { color: var(--accent); text-decoration: none; }

/* ---------- 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.site-header.scrolled { border-color: var(--border); box-shadow: var(--shadow); }

.header-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; }

.brand { font-weight: 700; font-size: 1.1rem; color: var(--text); letter-spacing: 0.5px; }
.brand-dot { color: var(--accent); font-weight: 500; }

.theme-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition: transform 0.2s, border-color 0.2s;
}
.theme-btn:hover { transform: rotate(15deg); border-color: var(--accent); }
.icon { width: 20px; height: 20px; }
html[data-theme="dark"] .icon-sun { display: none; }
html:not([data-theme="dark"]) .icon-moon { display: none; }

/* ---------- 主区域 ---------- */
.hero { position: relative; flex: 1; display: flex; align-items: center; padding: 80px 0; overflow: hidden; }
.hero-inner { position: relative; z-index: 1; text-align: center; }

.hello { color: var(--muted); font-size: 1.05rem; letter-spacing: 2px; }

.hero-name {
  font-size: clamp(3rem, 10vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  margin: 8px 0 12px;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-tagline { font-size: 1.1rem; color: var(--muted); margin-bottom: 8px; }
.hero-desc { color: var(--muted); margin-bottom: 32px; }

.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 10px 26px;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  color: #fff;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.35);
}
.btn-ghost { color: var(--text); border: 1px solid var(--border); background: var(--surface); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

.hero-glow {
  position: absolute;
  top: -160px; left: 50%;
  transform: translateX(-50%);
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.18) 0%, transparent 65%);
  pointer-events: none;
}

/* ---------- 页脚 ---------- */
.site-footer {
  padding: 32px 0;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--muted);
  font-size: 0.88rem;
}
.footer-icp { margin-top: 8px; font-size: 0.8rem; }
.footer-icp a { color: var(--muted); opacity: 0.8; }
.footer-icp a:hover { color: var(--accent); opacity: 1; }

/* ---------- 入场动画 ---------- */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}