:root {
  --weibo-orange: #ff8200;
  --weibo-red: #e6162d;
  --qzone-yellow: #ffd54f;
  --qzone-sky: #64b5f6;
  --qzone-sky-deep: #1e88e5;
  --cream: #fff9f2;
  --paper: #fffdf8;
  --ink: #2a2118;
  --ink-soft: #5d4e42;
  --ink-muted: #9e8e82;
  --radius: 20px;
  --font-display: "ZCOOL XiaoWei", "Ma Shan Zheng", serif;
  --font-body: "Noto Sans SC", "PingFang SC", sans-serif;
  --card-shadow: 0 12px 40px rgba(42, 33, 24, 0.1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font-body);
  background: var(--cream);
  color: var(--ink);
  min-height: 100vh;
  line-height: 1.7;
}

.bg-pattern {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 18% 12%, rgba(255, 130, 0, 0.16) 0%, transparent 42%),
    radial-gradient(circle at 82% 18%, rgba(100, 181, 246, 0.18) 0%, transparent 40%),
    radial-gradient(circle at 50% 88%, rgba(230, 22, 45, 0.08) 0%, transparent 45%),
    repeating-linear-gradient(
      45deg,
      transparent,
      transparent 48px,
      rgba(255, 213, 79, 0.03) 48px,
      rgba(255, 213, 79, 0.03) 49px
    );
  pointer-events: none;
  z-index: 0;
}

.bg-orbs {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.45;
  animation: float 12s ease-in-out infinite;
}

.orb-weibo {
  width: 280px;
  height: 280px;
  background: rgba(255, 130, 0, 0.35);
  top: 8%;
  left: -4%;
}

.orb-qzone {
  width: 320px;
  height: 320px;
  background: rgba(100, 181, 246, 0.35);
  bottom: 10%;
  right: -6%;
  animation-delay: -4s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(18px, -14px) scale(1.05); }
}

.app {
  position: relative;
  z-index: 1;
  max-width: 960px;
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}

.hero {
  text-align: center;
  margin-bottom: 3rem;
  animation: fadeDown 0.8s ease both;
}

.hero-badge {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-soft);
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(158, 142, 130, 0.25);
  padding: 0.35rem 1rem;
  border-radius: 999px;
  margin-bottom: 1rem;
  backdrop-filter: blur(8px);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 10vw, 4.2rem);
  line-height: 1.15;
  background: linear-gradient(135deg, var(--weibo-red) 0%, var(--weibo-orange) 45%, var(--qzone-sky-deep) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: none;
  filter: drop-shadow(2px 3px 0 rgba(255, 213, 79, 0.35));
}

.hero-sub {
  margin-top: 0.75rem;
  font-size: 1.05rem;
  color: var(--ink-soft);
  max-width: 32em;
  margin-inline: auto;
}

.hero-hint {
  margin-top: 0.5rem;
  font-size: 0.88rem;
  color: var(--ink-muted);
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  animation: fadeUp 0.9s ease 0.15s both;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 1.75rem 1.6rem 1.5rem;
  background: var(--paper);
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  text-decoration: none;
  color: inherit;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.8);
  transition: transform 0.35s ease, box-shadow 0.35s ease;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 48px rgba(42, 33, 24, 0.14);
}

.card-glow {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.35s ease;
  pointer-events: none;
}

.card-weibo .card-glow {
  background: radial-gradient(circle at 20% 0%, rgba(255, 130, 0, 0.12), transparent 55%);
}

.card-qzone .card-glow {
  background: radial-gradient(circle at 80% 0%, rgba(100, 181, 246, 0.15), transparent 55%);
}

.card:hover .card-glow { opacity: 1; }

.card-badge {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
}

.card-weibo .card-badge {
  color: var(--weibo-red);
  background: rgba(230, 22, 45, 0.08);
  align-self: flex-start;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
}

.card-qzone .card-badge {
  color: var(--qzone-sky-deep);
  background: rgba(100, 181, 246, 0.15);
  align-self: flex-start;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.85rem;
  margin-bottom: 0.5rem;
}

.card-weibo .card-title {
  text-shadow: 2px 2px 0 rgba(255, 130, 0, 0.25);
}

.card-qzone .card-title {
  text-shadow: 2px 2px 0 var(--qzone-yellow);
}

.card-desc {
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin-bottom: 1rem;
  flex: 1;
}

.card-features {
  list-style: none;
  margin-bottom: 1.25rem;
  font-size: 0.85rem;
  color: var(--ink-muted);
}

.card-features li {
  position: relative;
  padding-left: 1.1rem;
  margin-bottom: 0.35rem;
}

.card-features li::before {
  content: "◆";
  position: absolute;
  left: 0;
  font-size: 0.55rem;
  top: 0.45em;
}

.card-weibo .card-features li::before { color: var(--weibo-orange); }
.card-qzone .card-features li::before { color: var(--qzone-sky); }

.card-cta {
  font-size: 0.9rem;
  font-weight: 500;
  margin-top: auto;
}

.card-weibo .card-cta { color: var(--weibo-red); }
.card-qzone .card-cta { color: var(--qzone-sky-deep); }

.site-footer {
  position: relative;
  z-index: 1;
  margin-top: 3rem;
  padding: 1.15rem 1.25rem 2rem;
  text-align: center;
  border-top: 1px solid rgba(158, 142, 130, 0.18);
}

.site-footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.25rem 0.9rem;
  max-width: 960px;
  margin: 0 auto;
  font-size: 0.76rem;
  color: var(--ink-muted);
  letter-spacing: 0.03em;
}

.site-footer-link {
  color: inherit;
  text-decoration: none;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  transition: color 0.2s ease, background 0.2s ease;
}

.site-footer-link:hover {
  color: var(--ink-soft);
  background: rgba(42, 33, 24, 0.05);
}

.site-footer-sep {
  opacity: 0.45;
  user-select: none;
}

.site-footer-note {
  margin-top: 0.55rem;
  font-size: 0.72rem;
  color: var(--ink-muted);
  opacity: 0.85;
}

@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-16px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 640px) {
  .app { padding-top: 2rem; }
  .cards { grid-template-columns: 1fr; }
  .site-footer-sep { display: none; }
  .site-footer-inner { flex-direction: column; gap: 0.1rem; }
}