:root {
  --bg: #0b0d12;
  --bg-2: #11141b;
  --card: rgba(255, 255, 255, 0.04);
  --card-border: rgba(255, 255, 255, 0.08);
  --text: #e7eaf0;
  --text-2: #a5acb8;
  --text-3: #6e7682;
  --primary: #6c8cff;
  --primary-2: #a06cff;
  --accent: #34d399;
  --danger: #ff5c7a;
  --radius: 16px;
  --radius-lg: 22px;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
  --transition: 200ms cubic-bezier(.2,.8,.2,1);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }

/* 背景装饰 */
.bg-decor {
  position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(108, 140, 255, 0.18), transparent 60%),
    radial-gradient(900px 600px at -10% 30%, rgba(160, 108, 255, 0.18), transparent 60%),
    linear-gradient(180deg, #0b0d12 0%, #0a0c11 100%);
}
.blob { position: absolute; border-radius: 50%; filter: blur(80px); opacity: 0.35; }
.blob-1 { width: 420px; height: 420px; background: #6c8cff; top: -120px; left: -120px; }
.blob-2 { width: 360px; height: 360px; background: #a06cff; top: 30%; right: -120px; }
.blob-3 { width: 380px; height: 380px; background: #34d399; bottom: -160px; left: 30%; opacity: 0.2; }

/* 顶部导航 */
.navbar {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  background: rgba(11, 13, 18, 0.6);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.nav-inner {
  max-width: 1180px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.brand-mark {
  width: 32px; height: 32px; border-radius: 9px;
  display: grid; place-items: center; overflow: hidden;
  box-shadow: 0 6px 16px rgba(108, 80, 220, 0.45);
}
.brand-mark img { width: 100%; height: 100%; object-fit: cover; display: block; }
.brand-name { font-size: 18px; letter-spacing: 0.3px; }
.nav-links { display: flex; gap: 22px; color: var(--text-2); font-size: 14px; }
.nav-links a:hover { color: var(--text); }

/* Hero */
.hero { padding: 64px 24px 40px; }
.hero-inner {
  max-width: 1180px; margin: 0 auto;
  display: grid; grid-template-columns: 1.15fr 1fr; gap: 48px; align-items: center;
}
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px; border-radius: 999px;
  background: rgba(52, 211, 153, 0.12); color: #6ee7b7;
  font-size: 12px; font-weight: 500;
  border: 1px solid rgba(52, 211, 153, 0.25);
}
.badge .dot { width: 6px; height: 6px; border-radius: 50%; background: #34d399; box-shadow: 0 0 0 4px rgba(52, 211, 153, 0.18); }
.title {
  font-size: clamp(34px, 4.4vw, 54px);
  line-height: 1.15; margin: 18px 0 14px; letter-spacing: -0.5px;
  background: linear-gradient(180deg, #ffffff 0%, #c5cbd6 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.subtitle { color: var(--text-2); font-size: 16px; max-width: 520px; }

/* Hero CTA */
.hero-cta {
  display: inline-flex; align-items: center; gap: 10px;
  margin-top: 28px;
  padding: 14px 26px; border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff; font-weight: 600; font-size: 15px;
  box-shadow: 0 14px 34px rgba(108, 140, 255, 0.35);
  transition: transform var(--transition), box-shadow var(--transition);
}
.hero-cta:hover { transform: translateY(-2px); box-shadow: 0 18px 40px rgba(108, 140, 255, 0.5); }
.hero-cta:active { transform: translateY(0); }

/* 主下载按钮 */
.primary-download { margin-top: 28px; min-height: 76px; }
.primary-btn {
  display: inline-flex; align-items: center; gap: 14px;
  padding: 14px 22px; border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff; font-weight: 600; font-size: 16px;
  box-shadow: 0 14px 34px rgba(108, 140, 255, 0.35);
  transition: transform var(--transition), box-shadow var(--transition);
  cursor: pointer; border: none;
}
.primary-btn:hover { transform: translateY(-2px); box-shadow: 0 18px 38px rgba(108, 140, 255, 0.45); }
.primary-btn:active { transform: translateY(0); }
.primary-btn .icon { width: 24px; height: 24px; display: grid; place-items: center; }
.primary-btn .label small { display: block; opacity: 0.85; font-size: 12px; font-weight: 400; }

.arch-toggle { display: inline-flex; gap: 8px; margin-left: 12px; vertical-align: middle; flex-wrap: wrap; }
.arch-toggle button {
  display: inline-flex; flex-direction: column; align-items: flex-start; gap: 2px;
  background: rgba(255, 255, 255, 0.06); border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-2); padding: 9px 14px; border-radius: 12px;
  cursor: pointer; transition: all var(--transition);
  text-align: left; line-height: 1.2;
}
.arch-toggle .t-name { font-size: 13px; font-weight: 600; color: var(--text); }
.arch-toggle .t-hint { font-size: 11px; color: var(--text-3); }
.arch-toggle button.active {
  background: rgba(108, 140, 255, 0.18);
  border-color: rgba(108, 140, 255, 0.45);
  box-shadow: 0 6px 16px rgba(108, 140, 255, 0.2);
}
.arch-toggle button.active .t-name { color: #fff; }
.arch-toggle button.active .t-hint { color: #c5d0ff; }
.arch-toggle button:hover { border-color: rgba(255, 255, 255, 0.2); }
.arch-toggle button:hover .t-name { color: #fff; }

.meta-row { margin-top: 14px; color: var(--text-3); font-size: 13px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.meta-item { color: var(--text-2); }
.meta-dot { color: var(--text-3); }

.changelog {
  margin-top: 18px; padding: 14px 16px;
  background: var(--card); border: 1px solid var(--card-border);
  border-radius: 12px; max-width: 560px;
}
.changelog-title { font-size: 12px; color: var(--text-3); margin-bottom: 4px; letter-spacing: 0.5px; }
.changelog-text { color: var(--text-2); font-size: 14px; margin: 0; }

/* 骨架屏 */
.primary-skeleton {
  display: inline-flex; align-items: center; gap: 14px;
  padding: 14px 22px; border-radius: 14px;
  background: rgba(255, 255, 255, 0.04); border: 1px solid var(--card-border);
}
.sk { background: linear-gradient(90deg, rgba(255,255,255,0.05), rgba(255,255,255,0.12), rgba(255,255,255,0.05));
  background-size: 200% 100%; animation: shimmer 1.4s infinite; border-radius: 6px; }
.sk-icon { width: 26px; height: 26px; border-radius: 8px; }
.sk-text { display: flex; flex-direction: column; gap: 6px; }
.sk-line { height: 12px; }
.sk-line.lg { width: 220px; }
.sk-line.sm { width: 130px; height: 10px; }
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* Hero 视觉 - 全平台轨道动画 */
.hero-visual { display: grid; place-items: center; }
.orbit {
  position: relative;
  width: 100%; max-width: 460px; aspect-ratio: 1 / 1;
  --orbit-r: 42%;
}
.orbit-glow {
  position: absolute; inset: 28%; border-radius: 50%;
  background: radial-gradient(circle, rgba(108, 140, 255, 0.55), rgba(160, 108, 255, 0.35) 45%, transparent 70%);
  filter: blur(36px);
  animation: glow-breath 4s ease-in-out infinite;
}
@keyframes glow-breath {
  0%, 100% { opacity: 0.7; transform: scale(1); }
  50%      { opacity: 1;   transform: scale(1.12); }
}
.orbit-ring {
  position: absolute; border-radius: 50%; pointer-events: none;
  border: 1px dashed rgba(255, 255, 255, 0.1);
}
.orbit-ring.r1 { inset: 18%; animation: ring-spin 60s linear infinite; }
.orbit-ring.r2 { inset: 0;   animation: ring-spin 90s linear infinite reverse; border-style: solid; border-color: rgba(255, 255, 255, 0.06); }
@keyframes ring-spin { to { transform: rotate(360deg); } }

.orbit-track {
  position: absolute; inset: 0;
  animation: orbit-spin 28s linear infinite;
}
@keyframes orbit-spin { to { transform: rotate(360deg); } }
@keyframes orbit-counter { to { transform: rotate(-360deg); } }

.planet {
  position: absolute; top: 50%; left: 50%;
  width: 60px; height: 60px; margin: -30px 0 0 -30px;
}
.planet.p1 { transform: rotate(0deg)   translateY(calc(-1 * var(--orbit-r))); }
.planet.p2 { transform: rotate(72deg)  translateY(calc(-1 * var(--orbit-r))); }
.planet.p3 { transform: rotate(144deg) translateY(calc(-1 * var(--orbit-r))); }
.planet.p4 { transform: rotate(216deg) translateY(calc(-1 * var(--orbit-r))); }
.planet.p5 { transform: rotate(288deg) translateY(calc(-1 * var(--orbit-r))); }

.planet-card {
  width: 100%; height: 100%;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.04));
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 16px;
  display: grid; place-items: center;
  color: #e7eaf0;
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  animation: orbit-counter 28s linear infinite;
}
.planet.p2 .planet-card,
.planet.p4 .planet-card { color: #cdd6ff; }
.planet.p3 .planet-card { color: #a8e6c1; }
.planet.p5 .planet-card { color: #ffd6a5; }

.orbit-center { position: absolute; inset: 0; display: grid; place-items: center; pointer-events: none; }
.logo-core {
  position: relative;
  width: 132px; height: 132px; border-radius: 34px;
  display: grid; place-items: center;
  box-shadow: 0 28px 70px rgba(108, 80, 220, 0.55), 0 0 0 1px rgba(255, 255, 255, 0.08), inset 0 1px 0 rgba(255, 255, 255, 0.18);
  overflow: hidden;
  animation: logo-float 4.5s ease-in-out infinite;
  background: #1a0f3a;
}
.logo-core img {
  width: 100%; height: 100%; object-fit: cover; display: block;
  position: relative; z-index: 1;
}
.logo-shine {
  position: absolute; inset: -50%; z-index: 2; pointer-events: none;
  background: linear-gradient(115deg, transparent 35%, rgba(255, 255, 255, 0.35) 50%, transparent 65%);
  animation: logo-shine 3.6s ease-in-out infinite;
}
@keyframes logo-float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-6px); }
}
@keyframes logo-shine {
  0%   { transform: translateX(-60%); }
  60%  { transform: translateX(60%); }
  100% { transform: translateX(60%); }
}

/* 平台网格 */
.platforms { padding: 60px 24px; max-width: 1180px; margin: 0 auto; }
.section-head { text-align: center; margin-bottom: 36px; }
.section-head h2 { font-size: clamp(24px, 3vw, 32px); margin: 0 0 8px; letter-spacing: -0.3px; }
.section-head p { color: var(--text-2); margin: 0; }

.grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.card {
  position: relative; padding: 20px;
  background: var(--card); border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
  display: flex; flex-direction: column;
}
.card:hover { transform: translateY(-3px); border-color: rgba(255, 255, 255, 0.18); background: rgba(255, 255, 255, 0.06); }
.card .platform-icon { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: rgba(255, 255, 255, 0.06); margin-bottom: 14px; color: var(--text); }
.card h3 { margin: 0 0 4px; font-size: 17px; }
.card .ver { color: var(--text-3); font-size: 12px; margin-bottom: 14px; line-height: 1.4; }
.card .arch-row { display: flex; flex-direction: column; gap: 8px; margin-top: auto; }
.card .download-btn {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  width: 100%;
  padding: 10px 12px; border-radius: 10px;
  background: rgba(255, 255, 255, 0.06); color: var(--text);
  font-size: 13px; font-weight: 500; cursor: pointer;
  border: 1px solid rgba(255, 255, 255, 0.08); transition: all var(--transition);
  text-align: left;
}
.card .download-btn .arch-info { flex: 1; min-width: 0; }
.card .download-btn .arch-name { display: block; font-weight: 600; font-size: 13px; line-height: 1.2; }
.card .download-btn .arch-hint { display: block; font-size: 11px; color: var(--text-3); margin-top: 2px; line-height: 1.2; }
.card .download-btn:hover { background: linear-gradient(135deg, var(--primary), var(--primary-2)); border-color: transparent; color: #fff; box-shadow: 0 10px 22px rgba(108, 140, 255, 0.35); }
.card .download-btn:hover .arch-hint { color: rgba(255, 255, 255, 0.85); }
.card .download-btn svg { width: 16px; height: 16px; flex-shrink: 0; }
.card.recommended { border-color: rgba(52, 211, 153, 0.35); background: rgba(52, 211, 153, 0.04); }
.card.recommended::after {
  content: "推荐"; position: absolute; top: 14px; right: 14px;
  font-size: 11px; padding: 3px 8px; border-radius: 999px;
  background: rgba(52, 211, 153, 0.15); color: #6ee7b7;
  border: 1px solid rgba(52, 211, 153, 0.3);
}

/* 特性 */
.features {
  max-width: 1180px; margin: 0 auto; padding: 30px 24px 60px;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px;
}
.feature-card {
  padding: 24px; background: var(--card); border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
}
.feature-icon {
  width: 44px; height: 44px; border-radius: 12px;
  background: linear-gradient(135deg, rgba(108, 140, 255, 0.18), rgba(160, 108, 255, 0.18));
  color: #cdd6ff; display: grid; place-items: center; margin-bottom: 14px;
}
.feature-icon svg { width: 22px; height: 22px; }
.feature-card h3 { margin: 0 0 6px; font-size: 17px; }
.feature-card p { margin: 0; color: var(--text-2); font-size: 14px; }

/* FAQ */
.faq { max-width: 880px; margin: 0 auto; padding: 30px 24px 80px; }
.faq details {
  background: var(--card); border: 1px solid var(--card-border);
  border-radius: 14px; padding: 14px 18px; margin-bottom: 10px;
  transition: background var(--transition);
}
.faq details[open] { background: rgba(255, 255, 255, 0.06); }
.faq summary { cursor: pointer; font-weight: 500; list-style: none; outline: none; position: relative; padding-right: 24px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: 0; top: 0; font-size: 20px; color: var(--text-3);
  transition: transform var(--transition);
}
.faq details[open] summary::after { content: "−"; }
.faq p { color: var(--text-2); margin: 10px 0 0; font-size: 14px; }

/* Footer */
footer { padding: 24px; text-align: center; color: var(--text-3); font-size: 13px; border-top: 1px solid rgba(255, 255, 255, 0.06); }

/* Toast */
.toast {
  position: fixed; left: 50%; bottom: 30px; transform: translate(-50%, 20px);
  padding: 12px 18px; background: rgba(20, 24, 32, 0.95); color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.1); border-radius: 12px;
  font-size: 14px; opacity: 0; pointer-events: none;
  transition: opacity var(--transition), transform var(--transition);
  z-index: 100; backdrop-filter: blur(10px);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* 响应式 */
@media (max-width: 1100px) {
  .grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 860px) {
  .hero { padding: 40px 20px 24px; }
  .hero-inner { grid-template-columns: 1fr; gap: 30px; }
  .hero-visual { order: -1; }
  .orbit { max-width: 340px; }
  .logo-core { width: 104px; height: 104px; border-radius: 28px; }
  .planet { width: 50px; height: 50px; margin: -25px 0 0 -25px; }
  .nav-links { display: none; }
}
@media (max-width: 760px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 540px) {
  .grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .primary-btn { width: 100%; justify-content: center; }
  .arch-toggle { display: flex; margin: 10px 0 0; }
  .arch-toggle button { flex: 1; }
}