/* ============================================
   手机游戏网 — 公共样式（页面骨架）
   Reset、滚动条、导航、页脚
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
  word-break: break-all;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  font-family: var(--f-body);
  font-weight: 400;
  line-height: 1.6;
  color: var(--c-text-1);
  background: var(--c-base);
}

img {
  display: block;
  max-width: 100%;
}

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

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
  background: none;
  border: none;
}

ul, ol {
  list-style: none;
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--c-base);
}

::-webkit-scrollbar-thumb {
  background: var(--c-surface-4);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--c-accent-dim);
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 1000;
  height: var(--nav-h);
  background: rgba(19, 17, 15, 0.85);
  border-bottom: 1px solid var(--c-border);
  backdrop-filter: blur(20px) saturate(1.4);
  transition: background var(--duration) var(--ease-out);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-w);
  height: 100%;
  padding: 0 var(--sp-6);
  margin: 0 auto;
}

.nav-brand {
  display: flex;
  gap: var(--sp-3);
  align-items: center;
}

.nav-logo-icon {
  display: block;
  flex-shrink: 0;
  width: 28px;
  height: 28px;
}

.nav-logo {
  position: relative;
  font-family: var(--f-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--c-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.nav-logo::after {
  position: absolute;
  right: 0;
  bottom: -2px;
  left: 0;
  height: 2px;
  content: "";
  background: var(--c-accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.4s var(--ease-out);
}

.nav-brand:hover .nav-logo::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-links {
  display: flex;
  gap: var(--sp-1);
  align-items: center;
}

.nav-link {
  position: relative;
  padding: var(--sp-2) var(--sp-4);
  font-family: var(--f-display);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--c-text-2);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  transition: color var(--duration) var(--ease-out);
}

.nav-link:hover {
  color: var(--c-text-1);
}

.nav-link.active {
  color: var(--c-accent);
}

.nav-link::after {
  position: absolute;
  right: var(--sp-4);
  bottom: 0;
  left: var(--sp-4);
  height: 2px;
  content: "";
  background: var(--c-accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s var(--ease-out);
}

.nav-link:hover::after, .nav-link.active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-actions {
  display: flex;
  gap: var(--sp-3);
  align-items: center;
}

.nav-search {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  color: var(--c-text-2);
  border-radius: var(--r-md);
  transition: all var(--duration) var(--ease-out);
}

.nav-search:hover {
  color: var(--c-accent);
  background: var(--c-accent-glow);
}

.nav-cta {
  padding: var(--sp-2) var(--sp-5);
  font-family: var(--f-display);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--c-base);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  background: var(--c-accent);
  border-radius: var(--r-sm);
  transition: all var(--duration) var(--ease-out);
}

.nav-cta:hover {
  background: #e6ff4d;
  box-shadow: 0 0 20px var(--c-accent-glow);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--c-text-1);
  transition: all var(--duration) var(--ease-out);
}

/* --- Main Content --- */
.main {
  padding-top: var(--nav-h);
}

.container {
  max-width: var(--max-w);
  padding: 0 var(--sp-6);
  margin: 0 auto;
}

/* --- Footer --- */
.footer {
  padding: var(--sp-16) 0 var(--sp-8);
  margin-top: var(--sp-20);
  background: var(--c-surface-1);
  border-top: 1px solid var(--c-border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(2, 1fr);
  gap: var(--sp-10);
}

.footer-logo {
  margin-bottom: var(--sp-4);
  font-family: var(--f-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--c-accent);
}

.footer-desc {
  max-width: 420px;
  line-height: 1.8;
  color: var(--c-text-2);
}

.footer-col {
  display: flex;
  flex-direction: column;
}

.footer-col-title {
  margin-bottom: var(--sp-4);
  font-family: var(--f-display);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--c-text-1);
}

.footer-col a {
  margin-top: var(--sp-3);
  color: var(--c-text-2);
  transition: color var(--duration) var(--ease-out);
}

.footer-col a:hover {
  color: var(--c-accent);
}

.footer-bottom {
  padding-top: var(--sp-6);
  margin-top: var(--sp-12);
  font-size: var(--text-sm);
  color: var(--c-text-3);
  text-align: center;
  border-top: 1px solid var(--c-border);
}

/* --- Responsive: Navigation & Footer --- */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --nav-h: 60px;
  }

  .nav-links {
    position: fixed;
    top: var(--nav-h);
    right: 0;
    left: 0;
    flex-direction: column;
    gap: 0;
    padding: var(--sp-4);
    pointer-events: none;
    background: rgba(19, 17, 15, 0.97);
    border-bottom: 1px solid var(--c-border);
    opacity: 0;
    backdrop-filter: blur(20px);
    transform: translateY(-100%);
    transition: all var(--duration) var(--ease-out);
  }

  .nav-links.open {
    pointer-events: auto;
    opacity: 1;
    transform: translateY(0);
  }

  .nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    justify-content: center;
    width: 40px;
    height: 40px;
  }

  .nav-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    margin-left: auto;
    background: var(--c-text-1);
    border-radius: 2px;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    column-gap: var(--sp-6);
    row-gap: var(--sp-8);
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  .footer-col-title {
    margin-bottom: var(--sp-2);
    font-size: var(--text-sm);
  }

  .footer-col a {
    margin-top: var(--sp-2);
    font-size: var(--text-sm);
    line-height: 1.4;
  }
}