/* ============================================================
   音速加速器 · 共享样式表
   Design tokens:
   --bg        深空蓝 深邃背景
   --panel     卡片面板色
   --panel-2   悬浮/次级面板色
   --accent    信号橙 · 主行动色（速度/能量）
   --accent-2  数据青 · 仪表盘数字/高亮
   --text      主文字
   --muted     次要文字
   --online    在线状态绿
   ============================================================ */

:root {
  --bg: #0b111e;
  --bg-soft: #0e1524;
  --panel: #131b2e;
  --panel-2: #1b2740;
  --border: #223050;
  --accent: #ff6a35;
  --accent-dim: #ff6a3522;
  --accent-2: #23e0ff;
  --accent-2-dim: #23e0ff22;
  --text: #eaeef4;
  --muted: #7c8aa5;
  --muted-2: #536078;
  --online: #38e29b;

  --font-display: "Rajdhani", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "Consolas", monospace;

  --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
button { font-family: inherit; cursor: pointer; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.01em;
  margin: 0;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-2);
}
.eyebrow::before {
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent-2);
  box-shadow: 0 0 10px var(--accent-2);
}

.section {
  padding: 88px 0;
  position: relative;
}
.section-head {
  max-width: 640px;
  margin: 0 0 48px;
}
.section-head h2 {
  font-size: clamp(28px, 3.4vw, 40px);
  margin-top: 12px;
}
.section-head p {
  color: var(--muted);
  margin-top: 14px;
  font-size: 16px;
}
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, border-color .15s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #ff8a5c);
  color: #120803;
  box-shadow: 0 8px 24px -8px var(--accent-dim), 0 0 0 1px rgba(255,106,53,.25) inset;
}
.btn-primary:hover { box-shadow: 0 10px 30px -6px rgba(255,106,53,.55); transform: translateY(-1px); }
.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn-ghost:hover { border-color: var(--accent-2); color: var(--accent-2); }
.btn-block { width: 100%; }
.btn-lg { padding: 16px 30px; font-size: 16px; }

/* ============================================================
   HEADER（跨页面共用）
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 17, 30, 0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  color: var(--text);
}
.brand .bolt {
  width: 34px; height: 34px;
  border-radius: 9px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #0b111e;
  font-size: 18px;
}
.brand small {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .16em;
  color: var(--muted);
  font-weight: 500;
}

.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  padding: 10px 16px;
  border-radius: 7px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--muted);
  transition: color .15s ease, background .15s ease;
  position: relative;
}
.main-nav a:hover { color: var(--text); background: var(--panel); }
.main-nav a.active { color: var(--text); }
.main-nav a.active::after {
  content: "";
  position: absolute;
  left: 16px; right: 16px; bottom: 5px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.header-actions { display: flex; align-items: center; gap: 12px; }
.nav-toggle {
  display: none;
  background: none; border: 1px solid var(--border);
  width: 42px; height: 42px; border-radius: 8px;
  color: var(--text);
  align-items: center; justify-content: center;
}

/* ============================================================
   BANNER（跨页面共用的仪表盘状态条）
   ============================================================ */
.status-banner {
  position: relative;
  overflow: hidden;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border);
}
.status-banner::before {
  content: "";
  position: absolute; inset: 0;
  background-image: repeating-linear-gradient(
    115deg,
    transparent 0 46px,
    rgba(35, 224, 255, 0.05) 46px 47px,
    transparent 47px 92px,
    rgba(255, 106, 53, 0.05) 92px 93px
  );
  animation: sweep 14s linear infinite;
}
@keyframes sweep {
  0% { transform: translateX(0); }
  100% { transform: translateX(-180px); }
}
.status-banner-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 10px 0;
  font-size: 13.5px;
}
.status-msg {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 500;
}
.status-msg .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--online);
  box-shadow: 0 0 8px var(--online);
  flex-shrink: 0;
}
.status-stats {
  display: flex;
  gap: 26px;
  font-family: var(--font-mono);
  color: var(--muted);
}
.status-stats b {
  color: var(--accent-2);
  font-weight: 600;
}
.status-stats span { white-space: nowrap; }

/* ============================================================
   FOOTER（跨页面共用）
   ============================================================ */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
  padding: 64px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border);
}
.footer-brand p {
  color: var(--muted);
  font-size: 14px;
  margin-top: 14px;
  max-width: 300px;
}
.footer-col h4 {
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--muted-2);
  text-transform: uppercase;
  margin-bottom: 16px;
  font-family: var(--font-body);
  font-weight: 600;
}
.footer-col a, .footer-col li {
  color: var(--muted);
  font-size: 14px;
}
.footer-col li + li { margin-top: 11px; }
.footer-col a:hover { color: var(--accent-2); }
.social-row { display: flex; gap: 10px; margin-top: 14px; }
.social-row a {
  width: 36px; height: 36px;
  border: 1px solid var(--border);
  border-radius: 8px;
  display: grid; place-items: center;
  color: var(--muted);
}
.social-row a:hover { border-color: var(--accent-2); color: var(--accent-2); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 22px;
  font-size: 13px;
  color: var(--muted-2);
  flex-wrap: wrap;
  gap: 10px;
}

/* ============================================================
   页面 HERO（各页独立标题区）
   ============================================================ */
.page-hero {
  padding: 64px 0 40px;
  border-bottom: 1px solid var(--border);
  position: relative;
}
.page-hero .eyebrow { margin-bottom: 14px; }
.page-hero h1 {
  font-size: clamp(30px, 4vw, 44px);
}
.page-hero p {
  color: var(--muted);
  max-width: 560px;
  margin-top: 14px;
  font-size: 16px;
}

/* ---------- 首页大 Hero ---------- */
.hero {
  padding: 76px 0 40px;
  position: relative;
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}
.hero h1 {
  font-size: clamp(36px, 5vw, 56px);
  line-height: 1.12;
  margin-top: 16px;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p.lead {
  color: var(--muted);
  font-size: 17px;
  margin-top: 20px;
  max-width: 480px;
}
.hero-actions { display: flex; gap: 14px; margin-top: 32px; flex-wrap: wrap; }
.hero-trust {
  display: flex;
  gap: 28px;
  margin-top: 40px;
  font-family: var(--font-mono);
  color: var(--muted);
  font-size: 13px;
}
.hero-trust b { display: block; color: var(--text); font-size: 20px; font-family: var(--font-display); }

/* 仪表盘可视化 */
.dash {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 26px;
  position: relative;
  overflow: hidden;
}
.dash::after {
  content: "";
  position: absolute; inset: -40% -10%;
  background: radial-gradient(circle at 30% 20%, rgba(35,224,255,.15), transparent 60%),
              radial-gradient(circle at 80% 80%, rgba(255,106,53,.14), transparent 55%);
  pointer-events: none;
}
.dash-top {
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--font-mono);
  font-size: 12px; color: var(--muted);
  position: relative;
}
.dash-readout {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 22px 0;
  position: relative;
}
.dash-metric {
  background: rgba(255,255,255,.02);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 14px;
  text-align: center;
}
.dash-metric .num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  color: var(--accent-2);
}
.dash-metric .num.orange { color: var(--accent); }
.dash-metric .label {
  font-size: 11.5px;
  color: var(--muted);
  margin-top: 4px;
  letter-spacing: .04em;
}
.dash-bars { display: flex; gap: 5px; align-items: flex-end; height: 60px; position: relative; }
.dash-bars i {
  flex: 1;
  background: linear-gradient(180deg, var(--accent-2), transparent);
  opacity: .55;
  border-radius: 3px 3px 0 0;
  animation: bar 2.4s ease-in-out infinite;
}
@keyframes bar {
  0%, 100% { transform: scaleY(.4); }
  50% { transform: scaleY(1); }
}

/* ============================================================
   FEATURE / CARD GRIDS
   ============================================================ */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

.feature-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 26px;
  transition: border-color .2s ease, transform .2s ease;
}
.feature-card:hover { border-color: var(--accent-2); transform: translateY(-3px); }
.feature-icon {
  width: 42px; height: 42px;
  border-radius: 10px;
  display: grid; place-items: center;
  background: var(--accent-2-dim);
  color: var(--accent-2);
  margin-bottom: 16px;
}
.feature-card h3 { font-size: 17.5px; margin-bottom: 8px; font-family: var(--font-body); font-weight: 600; }
.feature-card p { color: var(--muted); font-size: 14.5px; }

/* 步骤 */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.step {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 26px;
  position: relative;
}
.step .step-no {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  letter-spacing: .1em;
}
.step h3 { margin: 12px 0 8px; font-size: 17px; }
.step p { color: var(--muted); font-size: 14.5px; }

/* speed-line divider（签名元素） */
.speed-divider {
  height: 1px;
  margin: 0;
  position: relative;
  background: var(--border);
  overflow: visible;
}
.speed-divider::before {
  content: "";
  position: absolute;
  top: -1px; left: 0;
  width: 90px; height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent), var(--accent-2), transparent);
  filter: blur(.3px);
  animation: dash-run 3.2s ease-in-out infinite;
}
@keyframes dash-run {
  0% { left: -10%; }
  100% { left: 110%; }
}

/* 评价 */
.quote-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.quote-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
}
.quote-card p { color: var(--text); font-size: 14.5px; }
.quote-who { display: flex; align-items: center; gap: 10px; margin-top: 16px; }
.avatar {
  width: 34px; height: 34px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: grid; place-items: center;
  font-size: 13px; font-weight: 700; color: #0b111e;
}
.quote-who small { color: var(--muted); display: block; font-size: 12px; }

/* CTA band */
.cta-band {
  border-radius: 20px;
  padding: 52px;
  text-align: center;
  background: radial-gradient(circle at 30% 0%, rgba(255,106,53,.16), transparent 60%),
              radial-gradient(circle at 80% 100%, rgba(35,224,255,.14), transparent 55%),
              var(--panel);
  border: 1px solid var(--border);
}
.cta-band h2 { font-size: clamp(24px, 3vw, 32px); }
.cta-band p { color: var(--muted); margin: 12px 0 26px; }

/* ============================================================
   价格页
   ============================================================ */
.plan-toggle {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 4px;
  gap: 4px;
  margin-bottom: 40px;
}
.plan-toggle button {
  border: none; background: none; color: var(--muted);
  padding: 8px 18px; border-radius: 7px; font-size: 13.5px; font-weight: 600;
}
.plan-toggle button.active { background: var(--panel-2); color: var(--text); }

.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: stretch; }
.plan-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
}
.plan-card.featured {
  border-color: var(--accent);
  background: linear-gradient(180deg, rgba(255,106,53,.08), var(--panel) 40%);
  transform: translateY(-8px);
}
.plan-badge {
  position: absolute; top: -13px; left: 28px;
  background: var(--accent);
  color: #120803;
  font-size: 12px; font-weight: 700;
  padding: 5px 12px; border-radius: 999px;
  font-family: var(--font-mono);
}
.plan-name { font-family: var(--font-mono); color: var(--muted); font-size: 13px; letter-spacing: .1em; text-transform: uppercase; }
.plan-title { font-size: 22px; margin-top: 8px; }
.plan-price { display: flex; align-items: baseline; gap: 6px; margin-top: 18px; }
.plan-price .num { font-family: var(--font-display); font-size: 44px; font-weight: 700; color: var(--text); }
.plan-price .unit { color: var(--muted); font-size: 14px; }
.plan-old { color: var(--muted-2); text-decoration: line-through; font-size: 13.5px; margin-top: 4px; }
.plan-desc { color: var(--muted); font-size: 13.5px; margin-top: 10px; }
.plan-features { margin: 26px 0; flex: 1; }
.plan-features li {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: 14.5px; color: var(--text);
  padding: 8px 0;
}
.plan-features li.off { color: var(--muted-2); }
.plan-features .check {
  color: var(--online); flex-shrink: 0; margin-top: 2px;
}
.plan-features li.off .check { color: var(--muted-2); }

/* 五套餐横排（星陌静态） */
.pricing-grid-5 {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
  align-items: stretch;
}
.plan-card.compact { padding: 22px 16px; border-radius: 14px; }
.plan-card.compact .plan-name { font-size: 11.5px; }
.plan-card.compact .plan-title { font-size: 17px; margin-top: 6px; }
.plan-card.compact .plan-price { margin-top: 14px; }
.plan-card.compact .plan-price .num { font-size: 30px; }
.plan-card.compact .plan-price .unit { font-size: 12.5px; }
.plan-card.compact .plan-desc { font-size: 12px; margin-top: 8px; }
.plan-card.compact .plan-features { margin: 18px 0; }
.plan-card.compact .plan-features li { font-size: 12.8px; padding: 6px 0; gap: 8px; }
.plan-card.compact .btn { padding: 11px 16px; font-size: 13.5px; }
.plan-card.compact.featured { transform: translateY(-6px); }

/* FAQ */
.faq { max-width: 760px; margin: 0 auto; }
.faq-item {
  border-bottom: 1px solid var(--border);
}
.faq-q {
  display: flex; justify-content: space-between; align-items: center;
  padding: 20px 4px; font-weight: 600; font-size: 15.5px;
  background: none; border: none; color: var(--text); width: 100%; text-align: left;
}
.faq-q .plus { color: var(--accent-2); transition: transform .2s ease; font-size: 20px; }
.faq-item.open .faq-q .plus { transform: rotate(45deg); }
.faq-a {
  max-height: 0; overflow: hidden;
  color: var(--muted); font-size: 14.5px;
  transition: max-height .25s ease, padding .25s ease;
  padding: 0 4px;
}
.faq-item.open .faq-a { padding: 0 4px 20px; }

/* ============================================================
   服务器页
   ============================================================ */
.region-tabs { display: flex; gap: 10px; margin-bottom: 30px; flex-wrap: wrap; }
.region-tabs button {
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--muted);
  padding: 9px 20px; border-radius: 999px; font-size: 13.5px; font-weight: 600;
}
.region-tabs button.active { background: var(--accent-2-dim); border-color: var(--accent-2); color: var(--accent-2); }

.server-table { width: 100%; border-collapse: collapse; }
.server-table thead th {
  text-align: left; color: var(--muted-2); font-size: 12.5px;
  text-transform: uppercase; letter-spacing: .06em;
  padding: 0 16px 12px; font-weight: 600;
}
.server-row {
  background: var(--panel);
  border: 1px solid var(--border);
}
.server-row td { padding: 16px; font-size: 14.5px; }
.server-table tbody tr { display: table-row; }
.server-table tbody { display: table-row-group; }
.server-row td:first-child { border-radius: 12px 0 0 12px; border-left: 1px solid var(--border); }
.server-row td:last-child { border-radius: 0 12px 12px 0; border-right: 1px solid var(--border); }
.server-row td { border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.server-table tbody tr { box-shadow: none; }
.server-table tbody tr + tr td { border-top: none; }
.srv-name { display: flex; align-items: center; gap: 10px; font-weight: 600; }
.flag { font-size: 20px; }
.srv-status { display: flex; align-items: center; gap: 8px; color: var(--online); font-size: 13px; font-family: var(--font-mono); }
.srv-status .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--online); box-shadow: 0 0 6px var(--online); }
.ping-val { font-family: var(--font-mono); font-weight: 700; }
.ping-val.good { color: var(--online); }
.ping-val.mid { color: var(--accent); }
.load-bar { width: 110px; height: 6px; background: var(--panel-2); border-radius: 4px; overflow: hidden; }
.load-bar i { display: block; height: 100%; background: linear-gradient(90deg, var(--accent-2), var(--accent)); }

/* ============================================================
   下载页
   ============================================================ */
.download-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.download-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 22px;
  text-align: center;
  transition: transform .2s ease, border-color .2s ease;
}
.download-card:hover { transform: translateY(-4px); border-color: var(--accent-2); }
.platform-icon {
  width: 56px; height: 56px;
  margin: 0 auto 18px;
  border-radius: 14px;
  display: grid; place-items: center;
  background: var(--panel-2);
  color: var(--accent-2);
}
.download-card h3 { font-size: 17px; }
.download-card .ver { color: var(--muted); font-family: var(--font-mono); font-size: 12.5px; margin: 8px 0 20px; }
.download-card .req { color: var(--muted-2); font-size: 12px; margin-top: 10px; }

.install-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 20px; }
.qr-block {
  display: flex; align-items: center; gap: 24px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 26px 30px;
}
.qr-box {
  width: 96px; height: 96px;
  background: repeating-conic-gradient(#eaeef4 0% 25%, #0b111e 0% 50%) 0 0 / 12px 12px;
  border-radius: 8px;
  flex-shrink: 0;
}
.qr-text h3 { font-size: 16px; margin-bottom: 6px; }
.qr-text p { color: var(--muted); font-size: 13.5px; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; }
  .grid-3, .grid-4, .footer-grid, .steps, .quote-row, .pricing-grid, .pricing-grid-5, .download-grid, .install-steps { grid-template-columns: repeat(2, 1fr); }
  .status-stats span:nth-child(3) { display: none; }
}
@media (max-width: 760px) {
  .main-nav { display: none; }
  .nav-toggle { display: flex; }
  .plan-card.featured, .plan-card.compact.featured { transform: none; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 30px; }
}
@media (max-width: 560px) {
  .grid-3, .grid-4, .footer-grid, .steps, .quote-row, .pricing-grid, .pricing-grid-5, .download-grid, .install-steps { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
  .status-banner-inner { flex-direction: column; align-items: flex-start; gap: 6px; padding: 12px 0; }
  .qr-block { flex-direction: column; text-align: center; }
}

/* 移动端导航展开面板 */
.mobile-nav {
  display: none;
  flex-direction: column;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border);
  padding: 8px 28px 18px;
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
  padding: 13px 4px;
  color: var(--muted);
  font-size: 15px;
  border-bottom: 1px solid var(--border);
}
.mobile-nav a.active, .mobile-nav a:hover { color: var(--accent-2); }

/* 减少动态效果偏好 */
@media (prefers-reduced-motion: reduce) {
  .status-banner::before, .speed-divider::before, .dash-bars i { animation: none !important; }
}

/* 焦点可见性 */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 2px;
}