:root {
  --color-background: #0f172a;
  --color-background-elev: #151f38;
  --color-background-soft: #1b2742;
  --color-foreground: #f8fafc;
  --color-muted: #94a3b8;
  --color-border: #243049;
  --color-primary: #1e293b;
  --color-accent: #22c55e;
  --color-accent-hover: #4ade80;
  --color-accent-contrast: #06220f;
  --color-accent-soft: color-mix(in srgb, var(--color-accent) 13%, transparent);
  --shadow-card: 0 16px 40px -16px rgba(0, 0, 0, 0.6);
  --nav-bg: rgba(15, 23, 42, 0.72);
}

[data-theme="light"] {
  --color-background: #f6f8fc;
  --color-background-elev: #ffffff;
  --color-background-soft: #eef2f9;
  --color-foreground: #0f172a;
  --color-muted: #51607a;
  --color-border: #e2e8f0;
  --color-primary: #e2e8f0;
  --shadow-card: 0 16px 40px -20px rgba(15, 23, 42, 0.22);
  --nav-bg: rgba(246, 248, 252, 0.78);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 92px; }
body {
  min-width: 0;
  overflow-x: hidden;
  background: var(--color-background);
  color: var(--color-foreground);
  font-family: "Open Sans", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--color-background-soft); }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 5px; }

.container { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.ambient { position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; }
.blob { position: absolute; border-radius: 50%; filter: blur(90px); opacity: .9; }
.blob-1 { width: 520px; height: 520px; background: color-mix(in srgb, var(--color-accent) 25%, #6366f1 75%); top: -180px; left: -120px; opacity: .28; }
.blob-2 { width: 460px; height: 460px; background: var(--color-accent); top: 280px; right: -160px; opacity: .14; }
.grid-overlay {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(var(--color-border) 1px, transparent 1px), linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: .18;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 80%);
}

header.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--color-border);
  background: var(--nav-bg);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; min-height: 68px; gap: 18px; }
.brand { display: flex; align-items: center; gap: 11px; font-family: "Poppins", sans-serif; font-weight: 700; font-size: 1.12rem; }
.brand .logo { width: 32px; height: 32px; overflow: hidden; display: grid; place-items: center; border-radius: 9px; background: var(--color-accent); }
.brand .logo img { width: 100%; height: 100%; object-fit: cover; }
.brand-context { color: var(--color-muted); font-weight: 400; }
.nav-actions { display: flex; align-items: center; gap: 10px; }
.provider-switch { display: flex; align-items: center; gap: 5px; padding: 4px; border: 1px solid var(--color-border); border-radius: 12px; background: var(--color-background-elev); }
.provider-link { min-height: 30px; display: inline-flex; align-items: center; padding: 0 10px; border-radius: 8px; color: var(--color-muted); font-size: .76rem; font-weight: 700; transition: color .2s, background .2s; }
.provider-link:hover, .provider-link.active { color: var(--color-foreground); background: var(--color-accent-soft); }
.icon-btn { width: 38px; height: 38px; display: grid; place-items: center; cursor: pointer; border: 1px solid var(--color-border); border-radius: 10px; color: var(--color-muted); background: var(--color-background-elev); transition: color .2s, border-color .2s, transform .2s; }
.icon-btn:hover { color: var(--color-foreground); border-color: var(--color-accent); transform: translateY(-1px); }
.icon-btn svg { width: 18px; height: 18px; }
.btn { display: inline-flex; align-items: center; gap: 8px; min-height: 40px; padding: 0 15px; border: 1px solid transparent; border-radius: 10px; font-size: .88rem; font-weight: 700; transition: transform .2s, background .2s; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { color: var(--color-accent-contrast); background: var(--color-accent); }
.btn-primary:hover { background: var(--color-accent-hover); }

.vps-main { position: relative; z-index: 1; padding: 72px 0 90px; }
.vps-hero { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(280px, .75fr); gap: 46px; align-items: end; margin-bottom: 50px; }
.badge-promo { display: inline-block; padding: 5px 13px; margin-bottom: 18px; border: 1px solid var(--color-border); border-radius: 999px; background: var(--color-accent-soft); color: var(--color-accent); font-size: .76rem; font-weight: 700; letter-spacing: .06em; }
.vps-hero h1 { max-width: 760px; margin-bottom: 20px; font-family: "Poppins", sans-serif; font-size: clamp(2.4rem, 6vw, 5rem); line-height: 1.05; letter-spacing: -.04em; }
.vps-hero h1 em { color: var(--color-accent); font-style: normal; }
.vps-hero p { max-width: 720px; color: var(--color-muted); font-size: 1.08rem; }
.vps-hero-side { padding: 24px; border: 1px solid var(--color-border); border-radius: 18px; background: linear-gradient(145deg, var(--color-background-elev), var(--color-background-soft)); }
.vps-hero-side .side-label { color: var(--color-muted); font-size: .76rem; text-transform: uppercase; letter-spacing: .12em; font-weight: 700; }
.vps-hero-side strong { display: block; margin: 9px 0 4px; color: var(--color-accent); font: 700 2.2rem/1.1 "Poppins", sans-serif; }
.vps-hero-side span:last-child { color: var(--color-muted); font-size: .88rem; }

.vps-toolbar { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-bottom: 28px; }
.vps-filter { padding: 9px 14px; border: 1px solid var(--color-border); border-radius: 999px; background: var(--color-background-elev); color: var(--color-muted); cursor: pointer; font: inherit; font-size: .88rem; transition: color .2s, border-color .2s, background .2s; }
.vps-filter:hover, .vps-filter.active { color: var(--color-foreground); border-color: var(--color-accent); background: var(--color-accent-soft); }
.vps-update { margin-left: auto; color: var(--color-muted); font: .78rem "JetBrains Mono", monospace; }
.vps-category { scroll-margin-top: 92px; margin-top: 48px; }
.vps-category:first-child { margin-top: 0; }
.vps-category-head { display: flex; justify-content: space-between; gap: 20px; align-items: end; margin-bottom: 18px; }
.vps-category-head h2 { margin-bottom: 4px; font-family: "Poppins", sans-serif; font-size: clamp(1.35rem, 3vw, 1.85rem); }
.vps-category-head p { color: var(--color-muted); font-size: .9rem; }
.vps-category-badge { padding: 5px 10px; border: 1px solid var(--color-border); border-radius: 999px; color: var(--color-accent); background: var(--color-accent-soft); font-size: .74rem; white-space: nowrap; }
.vps-table-wrap { width: 100%; overflow-x: auto; border: 1px solid var(--color-border); border-radius: 16px; background: var(--color-background-elev); box-shadow: var(--shadow-card); }
.vps-table { width: 100%; min-width: 760px; border-collapse: collapse; text-align: left; }
.vps-table th, .vps-table td { padding: 15px 18px; border-bottom: 1px solid var(--color-border); white-space: nowrap; }
.vps-table th { color: var(--color-muted); background: var(--color-background-soft); font: 700 .74rem "JetBrains Mono", monospace; letter-spacing: .04em; text-transform: uppercase; }
.vps-table tr:last-child td { border-bottom: 0; }
.vps-table tbody tr { transition: background .2s; }
.vps-table tbody tr:hover, .vps-table tbody tr.featured { background: var(--color-accent-soft); }
.vps-table td { font-size: .91rem; }
.vps-table .price { color: var(--color-accent); font: 700 1.05rem "JetBrains Mono", monospace; }
.vps-table .plan-name { color: var(--color-foreground); font-weight: 700; }
.featured-star { margin-right: 6px; color: var(--color-accent); }
.vps-buy { display: inline-flex; align-items: center; gap: 5px; padding: 8px 12px; border-radius: 9px; color: var(--color-accent-contrast); background: var(--color-accent); font-weight: 700; font-size: .82rem; transition: transform .2s, background .2s; }
.vps-buy:hover { background: var(--color-accent-hover); transform: translateY(-1px); }
.vps-buy svg { width: 14px; height: 14px; }
.vps-notes { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); gap: 14px; margin-top: 48px; }
.vps-note { padding: 18px; border: 1px solid var(--color-border); border-radius: 14px; background: var(--color-background-elev); color: var(--color-muted); font-size: .86rem; }
.vps-note b { display: block; margin-bottom: 5px; color: var(--color-foreground); font-size: .78rem; }
.vps-empty { padding: 40px 20px; color: var(--color-muted); text-align: center; }
.back-to-top {
  position: fixed;
  right: max(22px, env(safe-area-inset-right));
  bottom: max(22px, env(safe-area-inset-bottom));
  z-index: 40;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--color-accent) 42%, var(--color-border));
  border-radius: 14px;
  color: var(--color-accent-contrast);
  background: var(--color-accent);
  box-shadow: 0 14px 30px -12px color-mix(in srgb, var(--color-accent) 55%, transparent);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity .2s, visibility .2s, transform .2s, background .2s;
}
.back-to-top span { font: 700 1.35rem/1 "Poppins", sans-serif; transform: translateY(-1px); }
.back-to-top.visible { opacity: 1; visibility: visible; pointer-events: auto; transform: translateY(0); }
.back-to-top:hover { background: var(--color-accent-hover); transform: translateY(-2px); }
.back-to-top:focus-visible { outline: 3px solid var(--color-background); box-shadow: 0 0 0 5px var(--color-accent); }
footer { border-top: 1px solid var(--color-border); padding: 28px 0 34px; }
.footer-inner { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; color: var(--color-muted); font-size: .82rem; }

@media (max-width: 960px) {
  .provider-switch { display: none; }
  .vps-hero { grid-template-columns: 1fr; gap: 24px; }
  .vps-notes { grid-template-columns: 1fr; }
}
@media (max-width: 680px) {
  .container { padding: 0 16px; }
  .brand-context, .btn-primary { display: none; }
  .vps-main { padding-top: 48px; }
  .vps-category-head { align-items: flex-start; flex-direction: column; gap: 8px; }
  .vps-update { width: 100%; margin-left: 0; }
  .vps-hero h1 { font-size: clamp(2.4rem, 15vw, 4rem); }
  .back-to-top { right: 16px; bottom: 16px; width: 44px; height: 44px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}