/* ===== 主题变量 ===== */
:root {
  --color-bg: #0b0f1a;
  --color-bg-alt: #111729;
  --color-surface: #161d33;
  --color-border: #232b45;
  --color-text: #e8ecf7;
  --color-text-dim: #9aa4c2;
  --color-primary: #ff8a3d;
  --color-primary-dim: #ff8a3d33;
  --color-accent: #4fd1c5;
  --radius: 14px;
  --container-width: 1160px;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4 { margin: 0 0 0.5em; font-weight: 700; }
p { margin: 0 0 1em; }

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  transition: transform .15s ease, opacity .15s ease;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), #ffb37a);
  color: #1a1206;
}
.btn-outline {
  border-color: var(--color-border);
  color: var(--color-text);
  background: transparent;
}
.btn-lg { padding: 14px 30px; font-size: 16px; }

/* ===== 顶部导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 15, 26, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
}
.main-nav {
  display: flex;
  gap: 32px;
}
.main-nav a {
  color: var(--color-text-dim);
  font-size: 15px;
}
.main-nav a:hover { color: var(--color-text); }
.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--color-text);
}

/* ===== Hero ===== */
.hero {
  padding: 88px 0 64px;
  background: radial-gradient(circle at 80% 0%, #ff8a3d22, transparent 55%);
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}
.eyebrow {
  color: var(--color-primary);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: .04em;
  margin-bottom: 12px;
}
.hero h1 {
  font-size: 42px;
  line-height: 1.3;
}
.hero-sub {
  color: var(--color-text-dim);
  font-size: 16px;
  max-width: 560px;
}
.hero-sub strong { color: var(--color-text); }
.hero-cta { display: flex; gap: 16px; margin: 24px 0; flex-wrap: wrap; }
.hero-badges { display: flex; gap: 10px; flex-wrap: wrap; }
.badge {
  padding: 5px 14px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  color: var(--color-text-dim);
  font-size: 13px;
}
.hero-visual { display: flex; justify-content: center; }

/* ===== 数据条 ===== */
.stats { padding: 40px 0; background: var(--color-bg-alt); }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.stat-num {
  display: block;
  font-size: 32px;
  font-weight: 800;
  color: var(--color-primary);
}
.stat-label { color: var(--color-text-dim); font-size: 14px; }
.stats-note {
  text-align: center;
  color: var(--color-text-dim);
  font-size: 12px;
  margin-top: 20px;
}

/* ===== 通用标题 ===== */
.section-title { font-size: 30px; text-align: center; }
.section-sub {
  text-align: center;
  color: var(--color-text-dim);
  margin-bottom: 40px;
}

/* ===== 功能特性 ===== */
.features { padding: 88px 0; }
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
}
.feature-card img { margin-bottom: 14px; }
.feature-card h3 { font-size: 18px; }
.feature-card p { color: var(--color-text-dim); font-size: 14px; margin: 0; }
.feature-card strong { color: var(--color-accent); }

/* ===== 节点覆盖 ===== */
.servers { padding: 88px 0; background: var(--color-bg-alt); }
.servers-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.servers-text .section-title,
.servers-text .section-sub { text-align: left; }
.server-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 24px;
}
.server-list li {
  display: flex;
  justify-content: space-between;
  padding: 14px 18px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 10px;
}
.server-list li span { font-weight: 600; }
.server-list li small { color: var(--color-text-dim); }
.game-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.tag {
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--color-primary-dim);
  color: var(--color-primary);
  font-size: 13px;
}

/* ===== 价格方案 ===== */
.pricing { padding: 88px 0; }
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.price-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px 28px;
  text-align: center;
  position: relative;
}
.price-card.featured {
  border-color: var(--color-primary);
  transform: scale(1.03);
}
.price-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: #1a1206;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 999px;
}
.price { font-size: 16px; color: var(--color-text-dim); margin-bottom: 20px; }
.price span { font-size: 34px; font-weight: 800; color: var(--color-text); }
.price-card ul { margin-bottom: 24px; display: flex; flex-direction: column; gap: 10px; }
.price-card ul li { color: var(--color-text-dim); font-size: 14px; }
.pricing-note {
  text-align: center;
  color: var(--color-text-dim);
  font-size: 12px;
  margin-top: 24px;
}

/* ===== FAQ ===== */
.faq { padding: 88px 0; background: var(--color-bg-alt); }
.faq-list { max-width: 720px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-surface);
  overflow: hidden;
}
.faq-q {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 15px;
  font-weight: 600;
  padding: 18px 20px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
}
.faq-q::after {
  content: "+";
  color: var(--color-primary);
  font-size: 18px;
}
.faq-q[aria-expanded="true"]::after { content: "−"; }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .25s ease;
  padding: 0 20px;
}
.faq-a p { color: var(--color-text-dim); font-size: 14px; }
.faq-item.open .faq-a { max-height: 200px; padding: 0 20px 18px; }

/* ===== 下载区 ===== */
.download-cta {
  padding: 88px 0;
  text-align: center;
  background: linear-gradient(135deg, #ff8a3d22, transparent 60%);
}
.download-cta h2 { font-size: 30px; }
.download-cta p { color: var(--color-text-dim); }
.download-note { font-size: 12px; margin-top: 16px; }

/* ===== 页脚 ===== */
.site-footer { border-top: 1px solid var(--color-border); padding: 64px 0 24px; }
.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.4fr;
  gap: 32px;
  padding-bottom: 40px;
}
.footer-col h4 { font-size: 14px; color: var(--color-text-dim); margin-bottom: 14px; }
.footer-col a {
  display: block;
  color: var(--color-text-dim);
  font-size: 14px;
  margin-bottom: 10px;
}
.footer-col a:hover { color: var(--color-text); }
.footer-desc { color: var(--color-text-dim); font-size: 13px; }
.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 20px;
  text-align: center;
  color: var(--color-text-dim);
  font-size: 12px;
}
.footer-bottom p { margin: 0 0 6px; }
.compliance-note { color: var(--color-accent); }

/* ===== 响应式 ===== */
@media (max-width: 960px) {
  .hero-inner, .servers-inner { grid-template-columns: 1fr; }
  .servers-text .section-title, .servers-text .section-sub { text-align: center; }
  .servers-visual { order: -1; }
  .feature-grid, .pricing-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 680px) {
  .main-nav { display: none; }
  .nav-toggle { display: flex; }
  .hero h1 { font-size: 30px; }
  .feature-grid, .pricing-grid, .stats-grid { grid-template-columns: 1fr; }
  .price-card.featured { transform: none; }
  .footer-inner { grid-template-columns: 1fr; }
}

/* 移动端展开菜单 */
body.nav-open .main-nav {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 68px;
  left: 0;
  right: 0;
  background: var(--color-bg-alt);
  padding: 16px 24px;
  border-bottom: 1px solid var(--color-border);
}