/* ===========================
   SlingshotBear Games · Styles
   =========================== */

/* ---- 设计 Tokens ---- */
:root {
  --bg: #07070d;
  --bg-2: #0c0c16;
  --surface: #14141f;
  --surface-2: #1c1c2b;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);

  --text: #f1f1f8;
  --muted: #8a8aa3;
  --muted-2: #5e5e78;

  --accent: #00ffc8;       /* 弹弓 · 青绿 */
  --accent-2: #ff5e7a;     /* 熊 · 暖粉 */
  --accent-3: #ffd166;     /* 蜂蜜 · 暖黄 */

  --grad: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);

  --container: 1200px;
  --radius: 14px;
  --radius-lg: 24px;

  --font-sans: 'Space Grotesk', system-ui, -apple-system, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-display: 'Syne', 'Space Grotesk', system-ui, sans-serif;

  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  position: relative;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; transition: color .25s var(--ease); }
button { font: inherit; cursor: pointer; background: none; border: none; color: inherit; }
ul, ol { list-style: none; }

/* ---- 容器 ---- */
.container {
  width: min(100% - 40px, var(--container));
  margin-inline: auto;
}

/* ---- 背景层 ---- */
.bg-layer {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}
.bg-grid {
  position: absolute;
  inset: -2px;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 30%, transparent 90%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 30%, transparent 90%);
}
.bg-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.35;
  will-change: transform;
}
.bg-glow-1 {
  width: 600px; height: 600px;
  background: var(--accent);
  top: -200px; left: -100px;
  animation: float-1 18s var(--ease) infinite;
}
.bg-glow-2 {
  width: 700px; height: 700px;
  background: var(--accent-2);
  top: 30%; right: -200px;
  animation: float-2 22s var(--ease) infinite;
}
@keyframes float-1 {
  0%, 100% { transform: translate(0,0) scale(1); }
  50% { transform: translate(80px, 60px) scale(1.15); }
}
@keyframes float-2 {
  0%, 100% { transform: translate(0,0) scale(1); }
  50% { transform: translate(-60px, 80px) scale(1.1); }
}

/* ===========================
   导航
   =========================== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: background .3s var(--ease), border-color .3s var(--ease), backdrop-filter .3s var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(7, 7, 13, 0.72);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-bottom-color: var(--line);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}
.brand-mark { flex-shrink: 0; }
.brand-text b {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-links a {
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
}
.nav-links a:not(.btn)::after {
  content: '';
  position: absolute;
  left: 0; right: 100%;
  bottom: -6px;
  height: 2px;
  background: var(--grad);
  transition: right .3s var(--ease);
}
.nav-links a:not(.btn):hover { color: var(--text); }
.nav-links a:not(.btn):hover::after { right: 0; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text);
  transition: transform .3s var(--ease), opacity .3s var(--ease);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---- 按钮 ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s var(--ease), color .25s var(--ease);
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: #032420;
  box-shadow: 0 0 0 0 rgba(0,255,200,0.5);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 40px -10px rgba(0,255,200,0.6);
}
.btn-ghost {
  background: rgba(255,255,255,0.05);
  color: var(--text);
  border: 1px solid var(--line-strong);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.1);
  transform: translateY(-2px);
}

/* ===========================
   Hero
   =========================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 140px 0 80px;
}
.hero-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  text-transform: uppercase;
  background: rgba(255,255,255,0.02);
  backdrop-filter: blur(8px);
}
.hero-tag .dot {
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--accent);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 7vw, 5.5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin: 28px 0 24px;
}
.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
}
.hero-sub {
  color: var(--muted);
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  max-width: 580px;
  margin-bottom: 40px;
}
.hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
}

/* 数据条 */
.hero-stats {
  display: flex;
  gap: clamp(28px, 6vw, 72px);
  margin-top: 80px;
  padding-top: 40px;
  border-top: 1px solid var(--line);
  width: 100%;
  max-width: 640px;
  justify-content: space-between;
}
.stat { text-align: center; }
.stat-num {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
}
.stat-num span {
  -webkit-text-fill-color: var(--accent);
  margin-left: 2px;
}
.stat-label {
  margin-top: 8px;
  font-size: 0.85rem;
  color: var(--muted);
  letter-spacing: 0.05em;
}

/* 滚动提示 */
.scroll-hint {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--muted-2);
}
.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, transparent, var(--muted));
  position: relative;
  overflow: hidden;
}
.scroll-line::after {
  content: '';
  position: absolute;
  top: -40px; left: 0; right: 0;
  height: 40px;
  background: var(--accent);
  animation: scroll-dot 2s var(--ease) infinite;
}
@keyframes scroll-dot {
  0% { transform: translateY(0); opacity: 0; }
  30% { opacity: 1; }
  100% { transform: translateY(80px); opacity: 0; }
}

/* ===========================
   通用 Section
   =========================== */
.section { padding: 120px 0; position: relative; }
.section-head {
  margin-bottom: 64px;
  max-width: 720px;
}
.section-eyebrow {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin-bottom: 16px;
  text-transform: uppercase;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}
.section-title em {
  font-style: normal;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.section-desc {
  margin-top: 20px;
  color: var(--muted);
  font-size: 1.05rem;
}

/* ===========================
   About
   =========================== */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 80px;
  align-items: start;
}
.about-text .lede {
  font-size: 1.3rem;
  line-height: 1.5;
  color: var(--text);
  margin-bottom: 20px;
  font-weight: 500;
}
.about-text .lede strong {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.about-text p {
  color: var(--muted);
  margin-bottom: 18px;
}
.about-text p:last-child { margin-bottom: 0; }

.about-values {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.value-card {
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform .35s var(--ease), border-color .35s var(--ease), background .35s var(--ease);
}
.value-card:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  background: var(--surface-2);
}
.value-icon {
  font-size: 1.5rem;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
  margin-bottom: 12px;
}
.value-card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin-bottom: 8px;
}
.value-card p {
  color: var(--muted);
  font-size: 0.95rem;
}

/* ===========================
   Games
   =========================== */
.games-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.game-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform .4s var(--ease), border-color .4s var(--ease), box-shadow .4s var(--ease);
  display: flex;
  flex-direction: column;
}
.game-card:hover {
  transform: translateY(-8px);
  border-color: var(--line-strong);
  box-shadow: 0 30px 60px -20px rgba(0,0,0,0.6), 0 0 0 1px rgba(0,255,200,0.1);
}

.game-cover {
  aspect-ratio: 4 / 3;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.cover-1 {
  background:
    radial-gradient(circle at 30% 20%, rgba(0,255,200,0.4), transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(255,94,122,0.4), transparent 50%),
    linear-gradient(135deg, #0a1f1c, #1c0a14);
}
.cover-2 {
  background:
    radial-gradient(circle at 70% 30%, rgba(255,209,102,0.5), transparent 50%),
    radial-gradient(circle at 20% 70%, rgba(255,94,122,0.5), transparent 50%),
    linear-gradient(135deg, #1f0a0a, #2a1505);
}
.cover-3 {
  background:
    radial-gradient(circle at 50% 50%, rgba(255,209,102,0.4), transparent 60%),
    radial-gradient(circle at 10% 10%, rgba(0,255,200,0.3), transparent 50%),
    linear-gradient(135deg, #1f1a0a, #0a1f1a);
}
.cover-grain {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(255,255,255,0.08) 1px, transparent 2px),
    radial-gradient(circle at 70% 60%, rgba(255,255,255,0.06) 1px, transparent 2px),
    radial-gradient(circle at 40% 80%, rgba(255,255,255,0.05) 1px, transparent 2px);
  background-size: 80px 80px, 60px 60px, 100px 100px;
  mix-blend-mode: overlay;
  opacity: 0.7;
}
.game-cover .cover-emoji {
  font-size: 4.5rem;
  filter: drop-shadow(0 6px 24px rgba(0,0,0,0.5));
  transition: transform .5s var(--ease);
  z-index: 2;
}
.game-card:hover .cover-emoji { transform: scale(1.15) rotate(-5deg); }
.cover-title {
  position: absolute;
  bottom: 16px; left: 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: 0.18em;
  color: rgba(255,255,255,0.85);
  z-index: 2;
}
.game-status {
  position: absolute;
  top: 14px; right: 14px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(8px);
  z-index: 3;
}
.status-soon { color: var(--accent); border: 1px solid rgba(0,255,200,0.4); }
.status-dev { color: var(--accent-3); border: 1px solid rgba(255,209,102,0.4); }

.game-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}
.game-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--muted);
  letter-spacing: 0.03em;
}
.game-meta .sep { opacity: 0.5; }
.game-name {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
}
.game-desc {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.55;
}
.game-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
  padding-top: 12px;
}
.game-tags span {
  padding: 4px 10px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.75rem;
  color: var(--muted);
}

.games-note {
  margin-top: 48px;
  text-align: center;
  color: var(--muted);
}
.games-note a {
  color: var(--accent);
  font-weight: 600;
  border-bottom: 1px solid currentColor;
}

/* ===========================
   Contact
   =========================== */
.contact {
  padding-bottom: 80px;
}
.contact-card {
  background:
    radial-gradient(circle at 0% 0%, rgba(0,255,200,0.08), transparent 50%),
    radial-gradient(circle at 100% 100%, rgba(255,94,122,0.08), transparent 50%),
    var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  padding: clamp(32px, 5vw, 64px);
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
  align-items: center;
}
.contact-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.1;
  margin: 12px 0 20px;
  letter-spacing: -0.02em;
}
.contact-text {
  color: var(--muted);
  margin-bottom: 28px;
  font-size: 1.05rem;
}
.contact-email {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 20px;
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  font-weight: 600;
  font-size: 1rem;
  color: var(--accent);
  transition: all .25s var(--ease);
}
.contact-email:hover {
  border-color: var(--accent);
  background: rgba(0,255,200,0.08);
  transform: translateY(-2px);
}

.contact-socials {
  display: flex;
  gap: 12px;
  margin-top: 28px;
}
.social {
  width: 42px; height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--muted);
  transition: all .25s var(--ease);
}
.social:hover {
  color: var(--text);
  border-color: var(--accent);
  background: rgba(0,255,200,0.06);
  transform: translateY(-3px);
}

.contact-right {
  display: flex;
  justify-content: center;
}
.contact-blob {
  position: relative;
  width: 100%;
  max-width: 320px;
  aspect-ratio: 1;
}
.contact-bear { position: relative; z-index: 2; }
.contact-pulse {
  position: absolute;
  inset: 20%;
  border-radius: 50%;
  border: 1px solid rgba(0,255,200,0.3);
  animation: ripple 3s ease-out infinite;
}
@keyframes ripple {
  0% { transform: scale(0.8); opacity: 1; }
  100% { transform: scale(1.6); opacity: 0; }
}

/* ===========================
   Footer
   =========================== */
.footer {
  border-top: 1px solid var(--line);
  padding: 40px 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-brand p {
  color: var(--muted-2);
  font-size: 0.85rem;
  margin-top: 6px;
}
.footer-links {
  display: flex;
  gap: 24px;
}
.footer-links a {
  color: var(--muted);
  font-size: 0.9rem;
}
.footer-links a:hover { color: var(--text); }

/* ===========================
   Doc pages (Privacy / Terms)
   =========================== */
.doc-page {
  padding: 140px 0 80px;
  position: relative;
}
.doc-head {
  max-width: 760px;
  margin-bottom: 56px;
}
.doc-title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin: 12px 0 16px;
}
.doc-meta {
  color: var(--muted);
  font-size: 0.95rem;
  letter-spacing: 0.03em;
}

.doc-body {
  max-width: 760px;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text);
}
.doc-lede {
  font-size: 1.15rem;
  color: var(--muted);
  padding: 24px 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  margin-bottom: 48px;
}
.doc-section {
  margin-bottom: 40px;
  scroll-margin-top: 90px;
}
.doc-section h2 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 14px;
  letter-spacing: -0.01em;
}
.doc-section p {
  color: var(--muted);
  margin-bottom: 12px;
}
.doc-section p:last-child { margin-bottom: 0; }
.doc-section ul {
  list-style: none;
  margin: 8px 0 12px;
  padding: 0;
}
.doc-section li {
  position: relative;
  padding-left: 22px;
  color: var(--muted);
  margin-bottom: 8px;
}
.doc-section li::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 10px;
  width: 8px;
  height: 2px;
  background: var(--grad);
}
.doc-section strong {
  color: var(--text);
  font-weight: 600;
}
.doc-link {
  color: var(--accent);
  border-bottom: 1px solid currentColor;
}
.doc-link:hover { color: var(--accent-2); }

.doc-contact { margin-top: 16px !important; }

.doc-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  max-width: 760px;
  margin-top: 56px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
}
.doc-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: var(--text);
  transition: color .25s var(--ease), transform .25s var(--ease);
}
.doc-back:hover {
  color: var(--accent);
  transform: translateX(-4px);
}
.doc-related {
  font-size: 0.9rem;
  color: var(--muted);
}
.doc-related a {
  color: var(--accent);
  border-bottom: 1px solid currentColor;
}

/* ===========================
   Reveal 动画
   =========================== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ===========================
   响应式
   =========================== */
@media (max-width: 960px) {
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .games-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-card { grid-template-columns: 1fr; }
  .contact-right { order: -1; }
  .contact-blob { max-width: 220px; }
}

@media (max-width: 720px) {
  .nav-links {
    position: fixed;
    top: 72px; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(7,7,13,0.95);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--line);
    padding: 12px 20px 24px;
    transform: translateY(-110%);
    transition: transform .35s var(--ease);
    z-index: 90;
  }
  .nav-links.open { transform: translateY(0); }
  .nav-links a {
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
    font-size: 1rem;
  }
  .nav-links a:not(.btn)::after { display: none; }
  .nav-links .btn { margin-top: 14px; justify-content: center; }
  .nav-toggle { display: flex; }

  .hero { padding-top: 110px; min-height: auto; padding-bottom: 60px; }
  .hero-stats {
    margin-top: 56px;
    gap: 24px;
    flex-wrap: wrap;
  }
  .scroll-hint { display: none; }

  .section { padding: 80px 0; }
  .section-head { margin-bottom: 44px; }
}

@media (max-width: 520px) {
  .games-grid { grid-template-columns: 1fr; }
  .hero-cta { width: 100%; }
  .hero-cta .btn { flex: 1; justify-content: center; }
  .footer-inner { flex-direction: column; text-align: center; }
}