@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;600;700;900&display=swap');

:root {
  --bg-void: #080e1c;
  --bg-panel: #111a2e;
  --bg-glass: rgba(20, 30, 55, 0.78);
  --coral: #ff4f7b;
  --coral-soft: #ff8fab;
  --violet: #9d6bff;
  --violet-deep: #6b3fd4;
  --cyan: #4de8d4;
  --amber: #ffca5c;
  --text-main: #eef2ff;
  --text-dim: #9aa8c7;
  --border-glow: rgba(255, 79, 123, 0.28);
  --shadow-neon: 0 0 32px rgba(157, 107, 255, 0.18);
  --radius-lg: 22px;
  --radius-md: 14px;
  --nav-h: 60px;
  --sticky-h: 96px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg-void);
  color: var(--text-main);
  line-height: 1.9;
  font-size: 15px;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 45% at 10% 0%, rgba(157, 107, 255, 0.22), transparent 55%),
    radial-gradient(ellipse 55% 35% at 95% 15%, rgba(255, 79, 123, 0.2), transparent 50%),
    radial-gradient(ellipse 40% 30% at 50% 100%, rgba(77, 232, 212, 0.1), transparent 45%);
  pointer-events: none;
  z-index: 0;
}

a { color: var(--coral-soft); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--amber); }

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

.container {
  width: min(1140px, 93vw);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1100;
  background: rgba(8, 14, 28, 0.94);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-glow);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-h);
  gap: 14px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  color: var(--text-main);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

.brand img {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  box-shadow: 0 4px 16px rgba(255, 79, 123, 0.4);
}

.main-nav ul {
  display: flex;
  list-style: none;
  gap: 2px;
}

.main-nav a {
  color: var(--text-dim);
  padding: 8px 15px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.22s;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--text-main);
  background: linear-gradient(135deg, rgba(255, 79, 123, 0.18), rgba(157, 107, 255, 0.15));
}

.header-cta .btn-dl {
  padding: 9px 20px;
  font-size: 13px;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-glow);
  color: var(--text-main);
  font-size: 20px;
  padding: 6px 10px;
  border-radius: 8px;
  cursor: pointer;
}

/* Sticky ads */
.sticky-ads-bar {
  position: fixed;
  top: var(--nav-h);
  left: 0;
  right: 0;
  z-index: 1050;
  background: rgba(8, 14, 28, 0.96);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-glow);
  padding: 8px 0;
  transform: translateY(-110%);
  opacity: 0;
  transition: transform 0.3s, opacity 0.3s;
  pointer-events: none;
}

.sticky-ads-bar.visible {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

#ads-sticky {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 10px;
}

#ads-sticky > div {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: calc(12.5% - 10px);
  min-width: 72px;
}

#ads-sticky img {
  width: 62px;
  height: 62px;
  object-fit: cover;
  border-radius: 16px;
  box-shadow: 0 5px 16px rgba(0, 0, 0, 0.35);
  transition: transform 0.18s;
}

#ads-sticky img:hover { transform: scale(1.05); }

#ads-sticky .caption {
  font-size: 10px;
  color: var(--text-dim);
  margin-top: 3px;
  max-width: 72px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  text-align: center;
}

/* Top ads */
.ads-top-wrap {
  padding: 14px 0 6px;
  border-bottom: 1px solid rgba(255, 79, 123, 0.12);
}

#ads {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 10px;
}

#ads > div {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 70px;
}

#ads img {
  width: 65px;
  height: 65px;
  object-fit: cover;
  border-radius: 18px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.3);
  transition: transform 0.18s;
}

#ads img:hover { transform: translateY(-3px) scale(1.04); }

#ads .caption {
  font-size: 11px;
  color: var(--text-dim);
  margin-top: 4px;
  max-width: 70px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  text-align: center;
}

/* Buttons */
.btn-dl {
  display: inline-block;
  padding: 12px 28px;
  background: linear-gradient(135deg, var(--coral), var(--violet-deep));
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  box-shadow: 0 6px 24px rgba(255, 79, 123, 0.35);
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn-dl:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(157, 107, 255, 0.4);
}

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--coral);
  box-shadow: none;
}

.btn-outline:hover {
  background: rgba(255, 79, 123, 0.12);
}

/* Hero */
.hero {
  padding: 52px 0 44px;
  text-align: center;
}

.hero-tag {
  display: inline-block;
  padding: 5px 16px;
  background: rgba(157, 107, 255, 0.15);
  border: 1px solid rgba(157, 107, 255, 0.35);
  border-radius: 999px;
  font-size: 12px;
  color: var(--violet);
  font-weight: 600;
  letter-spacing: 0.06em;
  margin-bottom: 18px;
}

.hero h1 {
  font-size: clamp(1.6rem, 4.5vw, 2.35rem);
  font-weight: 900;
  line-height: 1.35;
  background: linear-gradient(135deg, var(--text-main) 30%, var(--coral-soft) 70%, var(--violet) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 16px;
  color: var(--text-dim);
  max-width: 720px;
  margin: 0 auto 24px;
}

.hero-btns {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Sections */
.section {
  padding: 48px 0;
}

.section-alt {
  background: rgba(17, 26, 46, 0.55);
  border-top: 1px solid rgba(157, 107, 255, 0.1);
  border-bottom: 1px solid rgba(157, 107, 255, 0.1);
}

.section-head {
  margin-bottom: 28px;
}

.section-head h2 {
  font-size: clamp(1.25rem, 3vw, 1.65rem);
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 10px;
  position: relative;
  padding-left: 16px;
}

.section-head h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 4px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--coral), var(--violet));
}

.section-head p {
  color: var(--text-dim);
  font-size: 15px;
}

.section p {
  margin-bottom: 14px;
  color: var(--text-dim);
}

.section p strong { color: var(--text-main); }

/* Breadcrumb */
.breadcrumb {
  padding: 14px 0;
  font-size: 13px;
  color: var(--text-dim);
}

.breadcrumb a { color: var(--coral-soft); }
.breadcrumb span { margin: 0 6px; opacity: 0.5; }

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
  margin: 24px 0;
}

.feature-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  padding: 22px;
  transition: transform 0.22s, box-shadow 0.22s;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-neon);
}

.feature-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--coral-soft);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 14px;
  margin-bottom: 0;
}

/* Highlight box */
.highlight-box {
  background: linear-gradient(135deg, rgba(255, 79, 123, 0.1), rgba(157, 107, 255, 0.08));
  border-left: 4px solid var(--coral);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 20px 24px;
  margin: 22px 0;
}

.highlight-box p { margin-bottom: 0; }

/* Media blocks */
.media-row {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 28px;
  align-items: start;
  margin: 28px 0;
}

.media-row.reverse { grid-template-columns: 1.4fr 1fr; }
.media-row.reverse .media-shot { order: 2; }
.media-row.reverse .media-text { order: 1; }

.media-shot {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-glow);
  box-shadow: var(--shadow-neon);
}

.media-shot img { width: 100%; }

.media-shot figcaption {
  padding: 10px 14px;
  font-size: 12px;
  color: var(--text-dim);
  background: var(--bg-panel);
  text-align: center;
}

.media-text h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
}

/* Bento */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 24px 0;
}

.bento-item {
  background: var(--bg-glass);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  padding: 20px;
}

.bento-item.wide { grid-column: span 2; }

.bento-item h4 {
  font-size: 15px;
  color: var(--cyan);
  margin-bottom: 8px;
}

.bento-item p { font-size: 14px; margin: 0; }

/* FAQ */
.faq-list { margin: 20px 0; }

.faq-item {
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item summary {
  padding: 16px 20px;
  font-weight: 600;
  cursor: pointer;
  background: var(--bg-glass);
  color: var(--text-main);
  list-style: none;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item .faq-body {
  padding: 0 20px 16px;
  font-size: 14px;
  color: var(--text-dim);
}

/* Page hero (subpages) */
.page-hero {
  padding: 36px 0 28px;
  border-bottom: 1px solid var(--border-glow);
}

.page-hero h1 {
  font-size: clamp(1.4rem, 3.5vw, 2rem);
  font-weight: 800;
  margin-bottom: 10px;
}

.page-hero p { color: var(--text-dim); max-width: 680px; }

.page-content {
  padding: 36px 0 56px;
}

.page-content h2 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--coral-soft);
  margin: 28px 0 12px;
}

.page-content h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  margin: 20px 0 10px;
}

.page-content p, .page-content li {
  color: var(--text-dim);
  margin-bottom: 12px;
}

.page-content ul, .page-content ol {
  padding-left: 22px;
  margin-bottom: 16px;
}

/* Error pages */
.error-page {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 20px;
}

.error-code {
  font-size: 5rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--coral), var(--violet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.error-page h1 { font-size: 1.4rem; margin: 16px 0 10px; }
.error-page p { color: var(--text-dim); margin-bottom: 24px; }

/* Footer */
.site-footer {
  background: var(--bg-panel);
  border-top: 1px solid var(--border-glow);
  padding: 36px 0 28px;
  margin-top: 20px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 28px;
  margin-bottom: 28px;
}

.footer-brand img {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.7;
}

.footer-links h4 {
  font-size: 14px;
  color: var(--text-main);
  margin-bottom: 12px;
}

.footer-links ul { list-style: none; }

.footer-links li { margin-bottom: 8px; }

.footer-links a {
  font-size: 13px;
  color: var(--text-dim);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 18px;
  text-align: center;
  font-size: 12px;
  color: var(--text-dim);
}

/* Responsive */
@media (max-width: 900px) {
  .main-nav { display: none; }
  .main-nav.open {
    display: block;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: rgba(8, 14, 28, 0.98);
    padding: 12px;
    border-bottom: 1px solid var(--border-glow);
  }
  .main-nav.open ul { flex-direction: column; }
  .nav-toggle { display: block; }
  .header-cta { display: none; }

  .media-row,
  .media-row.reverse {
    grid-template-columns: 1fr;
  }
  .media-row.reverse .media-shot,
  .media-row.reverse .media-text { order: unset; }

  .bento-grid { grid-template-columns: 1fr; }
  .bento-item.wide { grid-column: span 1; }

  .footer-grid { grid-template-columns: 1fr; }

  #ads-sticky > div {
    width: calc(25% - 10px);
  }
}

@media (min-width: 901px) {
  #ads-sticky > div {
    width: calc(12.5% - 10px);
  }
}