:root {
  --bg: #0d0d0d;
  --bg-soft: #161616;
  --fg: #f5f5f5;
  --fg-dim: #8a8a8a;
  --accent: #8a2be2;
  --accent-glow: rgba(138, 43, 226, 0.5);
  --gold: #d4af37;
  --border: rgba(245, 245, 245, 0.08);
}

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

html,
body {
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  font-weight: 300;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--fg);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--accent);
}

/* 主容器 */
.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
}

/* 顶部极简导航（默认隐藏，边缘触发） */
.top-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 48px;
  z-index: 100;
  opacity: 0;
  transform: translateY(-100%);
  transition: opacity 0.4s ease, transform 0.4s ease;
  background: linear-gradient(to bottom, rgba(13, 13, 13, 0.9), transparent);
}

.top-nav.show {
  opacity: 1;
  transform: translateY(0);
}

.top-nav .brand {
  font-weight: 900;
  letter-spacing: 2px;
  font-size: 18px;
}

.top-nav .links a {
  margin-left: 32px;
  font-size: 13px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--fg-dim);
}

/* 首屏 Hero */
.hero {
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
}

.hero .glow-ring {
  position: absolute;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  opacity: 0.3;
  filter: blur(40px);
  z-index: 0;
  animation: pulse 6s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.3; }
  50% { transform: scale(1.15); opacity: 0.45; }
}

.hero .name {
  font-size: 72px;
  font-weight: 900;
  letter-spacing: -2px;
  z-index: 1;
  background: linear-gradient(135deg, #fff 0%, var(--gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero .title {
  margin-top: 12px;
  font-size: 18px;
  font-weight: 300;
  color: var(--fg-dim);
  letter-spacing: 4px;
  text-transform: uppercase;
  z-index: 1;
}

.hero .scroll-hint {
  position: absolute;
  bottom: 96px;
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--fg-dim);
  z-index: 1;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); opacity: 0.4; }
  50% { transform: translateY(8px); opacity: 1; }
}

/* 隐藏按钮 */
.hidden-btn {
  position: absolute;
  width: 18px;
  height: 18px;
  border: none;
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  z-index: 50;
  opacity: 0;
  transition: all 0.35s ease;
  transform: translate(-50%, -50%);
}

/* 微弱常驻光点，吸引发现 */
.hidden-btn::before {
  content: '';
  position: absolute;
  inset: 6px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.15;
  transition: all 0.35s ease;
}

.hidden-btn:hover {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1.4);
}

.hidden-btn:hover::before {
  opacity: 1;
  box-shadow: 0 0 16px 4px var(--accent-glow);
}

.hidden-btn .tip {
  position: absolute;
  top: 28px;
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
  font-size: 11px;
  letter-spacing: 1px;
  color: var(--gold);
  opacity: 0;
  transition: opacity 0.35s ease;
  pointer-events: none;
}

.hidden-btn:hover .tip {
  opacity: 1;
}

/* 通用内容区 */
.content {
  flex: 1;
  max-width: 880px;
  margin: 0 auto;
  padding: 120px 32px 80px;
  width: 100%;
}

.content h1 {
  font-size: 42px;
  font-weight: 900;
  margin-bottom: 8px;
  letter-spacing: -1px;
}

.content .subtitle {
  color: var(--fg-dim);
  margin-bottom: 48px;
  font-size: 15px;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.card {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  margin-bottom: 20px;
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
}

.card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.card p {
  color: var(--fg-dim);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 14px;
}

.tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tag {
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 20px;
  background: rgba(138, 43, 226, 0.12);
  color: var(--accent);
  letter-spacing: 0.5px;
}

.btn-link {
  display: inline-block;
  margin-top: 12px;
  font-size: 13px;
  color: var(--gold);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease;
}

.btn-link:hover {
  border-color: var(--gold);
}

/* 返回按钮 */
.back {
  position: fixed;
  top: 24px;
  left: 24px;
  z-index: 100;
  font-size: 13px;
  color: var(--fg-dim);
  letter-spacing: 1px;
}

.back:hover {
  color: var(--accent);
}

/* 秘密彩蛋页 */
.secret-page {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  text-align: center;
}

.secret-page .box {
  animation: fadeIn 1s ease;
}

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

.secret-page h1 {
  font-size: 56px;
  font-weight: 900;
  color: var(--gold);
  margin-bottom: 16px;
}

.secret-page p {
  color: var(--fg-dim);
  letter-spacing: 2px;
}

/* 页脚 */
.footer {
  width: 100%;
  padding: 32px 16px;
  text-align: center;
  font-size: 12px;
  color: var(--fg-dim);
  letter-spacing: 0.5px;
  line-height: 1.8;
  border-top: 1px solid var(--border);
  margin-top: auto;
}

.footer a {
  color: var(--fg-dim);
  transition: color 0.3s ease;
}

.footer a:hover {
  color: var(--accent);
}

.footer .record-number {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.footer .record-number::before {
  content: '⚖';
  font-size: 11px;
  color: var(--gold);
}

/* 首页：备案信息固定在视口底部，始终可见 */
.is-home .footer {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(13, 13, 13, 0.85);
  backdrop-filter: blur(8px);
  border-top: 1px solid var(--border);
  z-index: 90;
}