/* ============================================================
   Ping 全球云节点测速 · 暗色科技风主题
   轻量自写，无外部字体/框架依赖，加载快
   ============================================================ */

:root {
  --bg: #05080f;
  --bg-2: #0a1020;
  --panel: rgba(255, 255, 255, 0.045);
  --panel-2: rgba(255, 255, 255, 0.07);
  --border: rgba(130, 170, 255, 0.14);
  --border-strong: rgba(130, 170, 255, 0.32);
  --text: #e8eefb;
  --muted: #8a98b8;
  --muted-2: #5f6c88;
  --cyan: #22d3ee;
  --blue: #3b82f6;
  --purple: #a855f7;
  --green: #34d399;
  --yellow: #fbbf24;
  --orange: #fb923c;
  --red: #f87171;
  --radius: 16px;
  --maxw: 1180px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --mono: "SFMono-Regular", ui-monospace, "JetBrains Mono", Consolas,
    "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

/* 科技感背景：网格 + 双色辉光 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 600px at 12% -8%, rgba(59, 130, 246, 0.20), transparent 60%),
    radial-gradient(800px 600px at 95% 0%, rgba(168, 85, 247, 0.18), transparent 60%),
    radial-gradient(700px 700px at 50% 120%, rgba(34, 211, 238, 0.12), transparent 60%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(120, 160, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 160, 255, 0.05) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 40%, transparent 100%);
}

a { color: var(--cyan); text-decoration: none; transition: color .2s; }
a:hover { color: #fff; }

/* ---------------- 顶部导航 ---------------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 14px 22px;
  background: rgba(8, 12, 22, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.nav .brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: .3px;
  font-size: 17px;
  color: #fff;
  white-space: nowrap;
}
.nav .brand .dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 12px 2px var(--cyan);
  animation: pulse 2.4s ease-in-out infinite;
}
.nav .links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-left: auto;
}
.nav .links a {
  padding: 7px 13px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 14px;
  border: 1px solid transparent;
  transition: .2s;
}
.nav .links a:hover {
  color: #fff;
  background: var(--panel-2);
  border-color: var(--border);
}
.nav .links a.active {
  color: #fff;
  background: linear-gradient(120deg, rgba(34,211,238,.18), rgba(168,85,247,.18));
  border-color: var(--border-strong);
}
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.35} }

/* ---------------- 通用容器 ---------------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }
.section { padding: 64px 0; }

/* ---------------- 首页 Hero ---------------- */
.hero {
  position: relative;
  padding: 96px 0 72px;
  text-align: center;
}
.hero .badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 999px;
  font-size: 13px; color: var(--cyan);
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.3);
  margin-bottom: 26px;
}
.hero h1 {
  font-size: clamp(34px, 6vw, 64px);
  line-height: 1.08;
  margin: 0 0 18px;
  font-weight: 850;
  letter-spacing: -.5px;
  background: linear-gradient(120deg, #fff 10%, var(--cyan) 45%, var(--purple) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p.sub {
  max-width: 720px; margin: 0 auto 34px;
  font-size: clamp(15px, 2.2vw, 19px);
  color: var(--muted);
}
.hero .cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 26px; border-radius: 12px;
  font-weight: 700; font-size: 15px; cursor: pointer;
  border: 1px solid transparent; transition: .2s;
}
.btn-primary {
  color: #04121a;
  background: linear-gradient(120deg, var(--cyan), var(--blue));
  box-shadow: 0 10px 30px -8px rgba(34, 211, 238, 0.6);
}
.btn-primary:hover { color: #04121a; transform: translateY(-2px); }
.btn-ghost {
  color: var(--text);
  background: var(--panel-2);
  border-color: var(--border);
}
.btn-ghost:hover { border-color: var(--border-strong); color: #fff; }

/* 浮动节点装饰 */
.hero .orbit {
  position: absolute; inset: 0; overflow: hidden; z-index: -1; pointer-events: none;
}
.hero .orbit span {
  position: absolute; width: 7px; height: 7px; border-radius: 50%;
  background: var(--cyan); box-shadow: 0 0 14px 2px var(--cyan);
  opacity: .7; animation: floaty linear infinite;
}
@keyframes floaty {
  0% { transform: translateY(0) }
  50% { transform: translateY(-26px) }
  100% { transform: translateY(0) }
}

/* ---------------- 数据条 ---------------- */
.stats { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; margin-top: 46px; }
.stat {
  min-width: 150px; padding: 18px 22px; border-radius: var(--radius);
  background: var(--panel); border: 1px solid var(--border); text-align: center;
}
.stat b { display: block; font-size: 30px; color: #fff; font-family: var(--mono); }
.stat span { color: var(--muted); font-size: 13px; }

/* ---------------- 卡片网格 ---------------- */
.grid { display: grid; gap: 18px; }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 920px) { .grid.cols-3, .grid.cols-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .grid.cols-3, .grid.cols-2, .grid.cols-4 { grid-template-columns: 1fr; } }

.card {
  position: relative;
  padding: 22px;
  border-radius: var(--radius);
  background: var(--panel);
  border: 1px solid var(--border);
  transition: .25s;
  overflow: hidden;
}
.card::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(400px 200px at var(--mx, 50%) var(--my, 0%), rgba(34,211,238,.12), transparent 60%);
  opacity: 0; transition: opacity .3s;
}
.card:hover { transform: translateY(-4px); border-color: var(--border-strong); }
.card:hover::before { opacity: 1; }

.pcard .plogo {
  width: 46px; height: 46px; border-radius: 12px; margin-bottom: 14px; display: block;
  background: #ffffff; padding: 5px; object-fit: contain;
  border: 1px solid rgba(255,255,255,.55); box-shadow: 0 6px 16px -8px rgba(0,0,0,.55);
}
.pcard h3 { margin: 0 0 4px; font-size: 19px; color: #fff; }
.pcard .pmeta { color: var(--muted); font-size: 13px; margin-bottom: 16px; }
.pcard .pfoot { display: flex; align-items: center; justify-content: space-between; }
.pcard .arrow { color: var(--cyan); font-weight: 700; }

/* ---------------- 步骤 ---------------- */
.steps { counter-reset: s; display: grid; gap: 18px; grid-template-columns: repeat(3, 1fr); }
@media (max-width: 760px) { .steps { grid-template-columns: 1fr; } }
.step { padding: 24px; border-radius: var(--radius); background: var(--panel); border: 1px solid var(--border); }
.step .num {
  width: 38px; height: 38px; border-radius: 10px; display: grid; place-items: center;
  font-weight: 800; color: var(--cyan); background: rgba(34,211,238,.1);
  border: 1px solid rgba(34,211,238,.3); margin-bottom: 14px; font-family: var(--mono);
}
.step h4 { margin: 0 0 6px; color: #fff; font-size: 16px; }
.step p { margin: 0; color: var(--muted); font-size: 14px; }

/* ---------------- 区块标题 ---------------- */
.heading { text-align: center; margin-bottom: 38px; }
.heading .eyebrow { color: var(--cyan); font-size: 13px; letter-spacing: 2px; text-transform: uppercase; }
.heading h2 { font-size: clamp(26px, 4vw, 38px); margin: 8px 0 8px; color: #fff; }
.heading p { color: var(--muted); max-width: 640px; margin: 0 auto; }

/* ---------------- 厂商页 ---------------- */
.phead {
  display: flex; align-items: center; gap: 18px; flex-wrap: wrap;
  padding: 30px 0 22px;
}
.phead .plogo {
  width: 56px; height: 56px; border-radius: 14px; display: block;
  background: #ffffff; padding: 6px; object-fit: contain;
  border: 1px solid rgba(255,255,255,.55); box-shadow: 0 8px 20px -8px rgba(0,0,0,.55);
}
.phead .ptitle { margin: 0; font-size: 26px; color: #fff; }
.phead .psub { margin: 2px 0 0; color: var(--muted); font-size: 14px; }
.phead .spacer { flex: 1; }
.status-pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 14px; border-radius: 999px; font-size: 13px; color: var(--muted);
  background: var(--panel); border: 1px solid var(--border);
}
.status-pill .led { width: 9px; height: 9px; border-radius: 50%; background: var(--muted-2); }
.status-pill.running .led { background: var(--green); box-shadow: 0 0 10px var(--green); animation: pulse 1.4s infinite; }

/* 开始/停止 按钮 */
.toggle {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 12px 24px; border-radius: 12px; cursor: pointer;
  font-weight: 800; font-size: 15px; border: 1px solid transparent;
  color: #04121a; background: linear-gradient(120deg, var(--cyan), var(--blue));
  box-shadow: 0 10px 26px -10px rgba(34,211,238,.6); transition: .2s;
}
.toggle:hover { transform: translateY(-2px); }
.toggle.stop { color: #fff; background: linear-gradient(120deg, var(--orange), var(--red)); box-shadow: 0 10px 26px -10px rgba(248,113,113,.6); }

/* 结果表格 */
.table-card {
  border-radius: var(--radius);
  background: var(--panel);
  border: 1px solid var(--border);
  overflow: hidden;
  margin-bottom: 26px;
}
.table-card .tcap {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px; border-bottom: 1px solid var(--border);
  font-size: 14px; color: var(--muted);
}
.table-card .tcap b { color: #fff; }
table.results { width: 100%; border-collapse: collapse; font-size: 14px; }
table.results thead th {
  text-align: left; padding: 12px 18px; color: var(--muted);
  font-weight: 600; font-size: 12px; letter-spacing: .5px; text-transform: uppercase;
  border-bottom: 1px solid var(--border); background: rgba(255,255,255,.02);
}
table.results tbody td { padding: 11px 18px; border-bottom: 1px solid rgba(255,255,255,.04); }
table.results tbody tr { transition: background .2s; }
table.results tbody tr:hover { background: var(--panel-2); }
.region { font-weight: 600; color: var(--text); }
.region .key { display: block; font-size: 11px; color: var(--muted-2); font-family: var(--mono); font-weight: 400; }
.nodeurl { font-family: var(--mono); font-size: 12px; color: var(--muted); word-break: break-all; }

.lat {
  display: flex; align-items: center; gap: 12px; min-width: 180px;
}
.lat .val { font-family: var(--mono); font-weight: 700; font-size: 15px; width: 78px; text-align: right; }
.lat .bar { flex: 1; height: 7px; border-radius: 999px; background: rgba(255,255,255,.08); overflow: hidden; }
.lat .bar i { display: block; height: 100%; width: 0; border-radius: 999px; transition: width .4s ease; }
.lat .bar i.g { background: linear-gradient(90deg, var(--green), #6ee7b7); }
.lat .bar i.y { background: linear-gradient(90deg, var(--yellow), #fde68a); }
.lat .bar i.o { background: linear-gradient(90deg, var(--orange), #fdba74); }
.lat .bar i.r { background: linear-gradient(90deg, var(--red), #fca5a5); }
.lat .val.g { color: var(--green); }
.lat .val.y { color: var(--yellow); }
.lat .val.o { color: var(--orange); }
.lat .val.r { color: var(--red); }

tr.best td:first-child { position: relative; }
tr.best .region::after {
  content: "★ 最快"; margin-left: 10px; font-size: 11px; font-weight: 700;
  color: #04121a; background: var(--green); padding: 2px 8px; border-radius: 999px;
}
tr.pending .lat .val { color: var(--muted-2); }

/* 优惠活动卡片区（保留原广告联盟链接） */
.promos { margin: 30px 0 8px; }
.promos-head {
  display: flex; align-items: center; gap: 14px;
  justify-content: center; margin: 6px 0 22px;
  color: var(--muted); font-size: 14px; letter-spacing: .5px;
}
.promos-head .ph-line { flex: 1; max-width: 120px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-strong)); }
.promos-head .ph-line:last-child { transform: scaleX(-1); }
.promo-grid { display: grid; gap: 16px; grid-template-columns: repeat(4, 1fr); }
@media (max-width: 920px) { .promo-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .promo-grid { grid-template-columns: 1fr; } }
.promo-card {
  position: relative; display: flex; flex-direction: column;
  padding: 20px 18px; border-radius: var(--radius); overflow: hidden;
  background: var(--panel); border: 1px solid var(--border);
  transition: .25s; text-decoration: none;
}
.promo-card::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
  background: var(--accent, var(--cyan)); opacity: .9;
}
.promo-card:hover { transform: translateY(-4px); border-color: var(--border-strong);
  box-shadow: 0 14px 30px -16px var(--accent, var(--cyan)); }
.promo-tag {
  align-self: flex-start; font-size: 12px; font-weight: 700; color: #fff;
  padding: 3px 10px; border-radius: 999px; margin-bottom: 12px;
  background: var(--accent, var(--cyan)); opacity: .92;
}
.promo-title { color: #fff; font-size: 17px; font-weight: 800; margin-bottom: 6px; }
.promo-desc { color: var(--muted); font-size: 13px; line-height: 1.5; flex: 1; }
.promo-cta {
  margin-top: 14px; font-size: 13px; font-weight: 700; color: var(--accent, var(--cyan));
  display: inline-flex; align-items: center; gap: 6px;
}
.promo-card.ali { --accent: #ff8a1f; }
.promo-card.tx  { --accent: #3b9bff; }
.promo-card.vultr { --accent: #3b82f6; }
.promo-card.bwh   { --accent: #ff7a1a; }

/* 原理说明 + 广告 iframe */
.about {
  padding: 26px; border-radius: var(--radius);
  background: var(--panel); border: 1px solid var(--border);
  color: var(--muted); font-size: 14px;
}
.about h2 { color: #fff; font-size: 19px; margin: 0 0 10px; }
.about a { color: var(--cyan); }
.about .promo { display: none; }

/* 首页特性卡片图标 */
.feat .fic {
  width: 42px; height: 42px; border-radius: 11px; display: grid; place-items: center;
  font-size: 20px; margin-bottom: 14px;
  background: rgba(34,211,238,.1); border: 1px solid rgba(34,211,238,.3);
}
.feat h3 { margin: 0 0 6px; color: #fff; font-size: 17px; }
.feat p { margin: 0; color: var(--muted); font-size: 14px; }

/* 页脚 */
.footer {
  border-top: 1px solid var(--border);
  padding: 34px 0; margin-top: 40px;
  color: var(--muted-2); font-size: 13px;
}
.footer .links { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 14px; }
.footer .links a { color: var(--muted); }
.footer .links a:hover { color: #fff; }

/* 提示 + 重要提醒 融合为一行紧凑信息条 */
.hint-bar {
  display: flex; align-items: center; flex-wrap: wrap; gap: 8px 12px;
  margin: 0 0 18px; padding: 12px 16px; border-radius: 12px;
  background: linear-gradient(100deg, rgba(56,189,248,.10), rgba(251,191,36,.10));
  border: 1px solid rgba(148,163,184,.22);
  font-size: 13px; line-height: 1.5; color: var(--muted);
}
.hint-bar .hb-dot {
  flex: none; width: 9px; height: 9px; border-radius: 50%;
  background: var(--cyan); box-shadow: 0 0 0 4px rgba(56,189,248,.18);
  animation: pulse 1.8s ease-in-out infinite;
}
.hint-bar .hb-note { flex: 1 1 300px; min-width: 200px; }
.hint-bar .hb-sep {
  flex: none; width: 1px; align-self: stretch;
  background: linear-gradient(rgba(148,163,184,.05), rgba(148,163,184,.35), rgba(148,163,184,.05));
}
.hint-bar .hb-tag {
  flex: none;
  background: linear-gradient(135deg, var(--red), var(--orange));
  color: #fff; font-size: 11px; font-weight: 800; letter-spacing: 1px;
  padding: 2px 9px; border-radius: 6px;
  box-shadow: 0 3px 12px -3px rgba(248,113,113,.8);
  animation: pulse 2s ease-in-out infinite;
}
.hint-bar .hb-text { flex: 1 1 260px; min-width: 180px; color: #fde68a; font-weight: 600; }
.hint-bar .hb-link {
  flex: none; white-space: nowrap;
  color: #04121a; font-weight: 800;
  background: linear-gradient(120deg, var(--orange), var(--red));
  padding: 4px 13px; border-radius: 999px; text-decoration: none;
  box-shadow: 0 6px 18px -8px rgba(248,113,113,.85);
  transition: .2s;
}
.hint-bar .hb-link:hover { filter: brightness(1.08); transform: translateY(-1px); }
@media (max-width: 720px) {
  .hint-bar .hb-sep { display: none; }
  .hint-bar { gap: 6px 0; }
  .hint-bar .hb-note, .hint-bar .hb-text { flex-basis: 100%; }
}