/* 91-s.click · 午夜绯红电蓝 · 原创视觉体系 */
:root {
  --bg-deep: #070508;
  --bg-panel: #110c10;
  --bg-card: #18121a;
  --bg-glass: rgba(20, 14, 22, 0.82);
  --border: rgba(255, 255, 255, 0.07);
  --border-rose: rgba(230, 73, 128, 0.32);
  --text: #f5eef2;
  --text-soft: #b8a8b4;
  --text-dim: #6e5f68;
  --rose: #e64980;
  --rose-deep: #c2255c;
  --rose-glow: rgba(230, 73, 128, 0.18);
  --cyan: #22b8cf;
  --cyan-dim: rgba(34, 184, 207, 0.14);
  --gold: #fab005;
  --gold-dim: rgba(250, 176, 5, 0.12);
  --violet: #845ef7;
  --gradient-hero: linear-gradient(145deg, rgba(194, 37, 92, 0.12) 0%, transparent 42%, rgba(34, 184, 207, 0.08) 100%);
  --gradient-btn: linear-gradient(120deg, #c2255c, #e64980 55%, #f06595);
  --shadow-deep: 0 24px 64px rgba(0, 0, 0, 0.55);
  --shadow-phone: 0 32px 80px rgba(0, 0, 0, 0.65);
  --nav-h: 56px;
  --adsbar-h-active: 92px;
  --radius: 16px;
  --radius-sm: 10px;
  --max-w: 1140px;
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  background: var(--bg-deep);
  color: var(--text);
  line-height: 1.85;
  font-size: 15px;
  overflow-x: hidden;
  padding-top: var(--nav-h);
}
body.ads-sticky-on { padding-top: calc(var(--nav-h) + var(--adsbar-h-active)); }
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 50% 38% at 92% 4%, var(--rose-glow), transparent),
    radial-gradient(ellipse 42% 32% at 6% 88%, var(--cyan-dim), transparent),
    radial-gradient(ellipse 30% 24% at 50% 50%, var(--gold-dim), transparent);
  pointer-events: none;
  z-index: 0;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--cyan); text-decoration: none; transition: color 0.2s, opacity 0.2s; }
a:hover { color: #66d9e8; }
ul { list-style: none; }

.container {
  width: min(100% - 28px, var(--max-w));
  margin-inline: auto;
  position: relative;
  z-index: 1;
}

/* ===== HEADER ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1300;
  height: var(--nav-h);
  background: rgba(7, 5, 8, 0.94);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
}
.site-header.scrolled { border-bottom-color: var(--border-rose); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-h);
  gap: 14px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--text);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.04em;
}
.brand img { height: 34px; width: auto; border-radius: 9px; }
.brand em { color: var(--rose); font-style: normal; font-weight: 800; }
.nav-desktop { display: none; gap: 2px; }
.nav-desktop a {
  color: var(--text-soft);
  font-size: 0.86rem;
  font-weight: 500;
  padding: 7px 13px;
  border-radius: var(--radius-sm);
}
.nav-desktop a:hover,
.nav-desktop a.active {
  color: var(--text);
  background: rgba(230, 73, 128, 0.1);
}
.menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.menu-toggle span {
  display: block;
  width: 21px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-mobile {
  position: fixed;
  top: var(--nav-h);
  left: 0;
  right: 0;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  padding: 12px 16px 16px;
  display: none;
  flex-direction: column;
  gap: 2px;
  z-index: 1290;
}
.nav-mobile.open { display: flex; }
.nav-mobile a {
  color: var(--text-soft);
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 0.92rem;
}
.nav-mobile a:hover { background: rgba(34, 184, 207, 0.08); color: var(--text); }

/* ===== ADS ===== */
.ads-sticky-bar {
  position: fixed;
  top: var(--nav-h);
  left: 0;
  right: 0;
  z-index: 1280;
  background: rgba(11, 8, 12, 0.97);
  border-bottom: 1px solid var(--border);
  padding: 8px 0;
  transform: translateY(-110%);
  opacity: 0;
  transition: transform 0.32s ease, opacity 0.32s ease;
  pointer-events: none;
}
.ads-sticky-bar.visible {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}
#ads,
#ads-sticky-inner {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 6px 10px;
  background: transparent;
}
#ads > div,
#ads-sticky-inner > div {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: calc(25% - 8px);
  max-width: 78px;
  box-sizing: border-box;
}
#ads img,
#ads-sticky-inner img {
  width: 62px;
  height: 62px;
  object-fit: cover;
  border-radius: 16px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
  border: 1px solid rgba(230, 73, 128, 0.15);
}
#ads a,
#ads-sticky-inner a { display: inline-block; border-radius: 14px; }
#ads img:hover,
#ads-sticky-inner img:hover {
  transform: translateY(-3px) scale(1.04);
  box-shadow: 0 10px 28px rgba(194, 37, 92, 0.25);
}
#ads .caption,
#ads-sticky-inner .caption {
  height: 15px;
  font-size: 10px;
  color: var(--text-dim);
  text-align: center;
  max-width: 76px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-top: 3px;
}
.ads-block {
  padding: 18px 0 8px;
  background: linear-gradient(180deg, rgba(194, 37, 92, 0.06), transparent);
  border-bottom: 1px solid var(--border);
}
.ads-block-label {
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-dim);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

/* ===== HERO ===== */
.hero {
  padding: 36px 0 52px;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-rose), transparent);
}
.hero-layout {
  display: grid;
  gap: 32px;
  align-items: center;
}
.hero-text { max-width: 540px; }
.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.76rem;
  color: var(--rose);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 14px;
  font-weight: 600;
}
.hero-kicker::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--gradient-btn);
  border-radius: 2px;
}
.hero h1 {
  font-size: clamp(1.75rem, 5.5vw, 2.65rem);
  line-height: 1.22;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.hero h1 span { color: var(--cyan); }
.hero-lead {
  color: var(--text-soft);
  font-size: 0.95rem;
  margin-bottom: 20px;
}
.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.hero-tag {
  font-size: 0.78rem;
  padding: 5px 12px;
  border-radius: 20px;
  border: 1px solid var(--border-rose);
  color: var(--text-soft);
  background: rgba(230, 73, 128, 0.06);
}
.hero-stack {
  position: relative;
  width: min(100%, 340px);
  height: 420px;
  margin-inline: auto;
}
.hero-stack .stack-item {
  position: absolute;
  width: 58%;
  border-radius: 22px;
  overflow: hidden;
  box-shadow: var(--shadow-phone);
  border: 2px solid rgba(255, 255, 255, 0.08);
}
.hero-stack .stack-item img { width: 100%; }
.hero-stack .stack-item:nth-child(1) {
  left: 0;
  top: 24px;
  transform: rotate(-7deg);
  z-index: 1;
}
.hero-stack .stack-item:nth-child(2) {
  left: 22%;
  top: 0;
  transform: rotate(2deg);
  z-index: 3;
}
.hero-stack .stack-item:nth-child(3) {
  right: 0;
  top: 36px;
  transform: rotate(8deg);
  z-index: 2;
}

/* ===== SECTIONS ===== */
.section { padding: 52px 0; }
.section-alt { background: var(--bg-panel); }
.section-head { margin-bottom: 32px; }
.section-eyebrow {
  font-size: 0.74rem;
  color: var(--rose);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 8px;
}
.section-head h2 {
  font-size: clamp(1.35rem, 4vw, 1.85rem);
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.3;
}
.section-head p { color: var(--text-soft); max-width: 720px; }

/* 3:7 content ratio layout */
.content-ratio {
  display: grid;
  gap: 28px;
}
.ratio-visual {
  display: grid;
  gap: 14px;
}
.ratio-visual img {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-deep);
}
.ratio-text h3 {
  font-size: 1.12rem;
  margin: 22px 0 10px;
  color: var(--text);
}
.ratio-text h3:first-child { margin-top: 0; }
.ratio-text p {
  color: var(--text-soft);
  margin-bottom: 12px;
  font-size: 0.93rem;
}
.ratio-text ul { margin: 10px 0 16px; }
.ratio-text li {
  color: var(--text-soft);
  font-size: 0.9rem;
  padding: 5px 0 5px 18px;
  position: relative;
}
.ratio-text li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 13px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--rose);
}

.feature-row {
  display: grid;
  gap: 20px;
  margin-top: 28px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 20px;
  transition: border-color 0.25s;
}
.feature-card:hover { border-color: var(--border-rose); }
.feature-card .fc-num {
  font-size: 0.72rem;
  color: var(--rose);
  font-weight: 700;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}
.feature-card h4 { font-size: 1rem; margin-bottom: 8px; }
.feature-card p { color: var(--text-soft); font-size: 0.88rem; line-height: 1.75; }

.gallery-duo {
  display: grid;
  gap: 14px;
  margin: 24px 0;
}
.gallery-duo figure { margin: 0; }
.gallery-duo figcaption {
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-top: 6px;
  text-align: center;
}
.gallery-duo img {
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.stats-band {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  padding: 28px 0;
  border-block: 1px solid var(--border);
}
.stat-cell {
  text-align: center;
  padding: 14px 8px;
}
.stat-cell strong {
  display: block;
  font-size: 1.5rem;
  color: var(--cyan);
  font-weight: 800;
  line-height: 1.2;
}
.stat-cell span {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.channel-grid {
  display: grid;
  gap: 14px;
}
.channel-item {
  display: flex;
  gap: 14px;
  padding: 16px;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}
.channel-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  background: var(--rose-glow);
  color: var(--rose);
}
.channel-item h4 { font-size: 0.95rem; margin-bottom: 4px; }
.channel-item p { color: var(--text-soft); font-size: 0.85rem; line-height: 1.7; }

.faq-list { display: grid; gap: 8px; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-card);
}
.faq-q {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 600;
  padding: 14px 16px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-family: inherit;
}
.faq-q::after {
  content: "+";
  color: var(--rose);
  font-size: 1.2rem;
  font-weight: 400;
  transition: transform 0.25s;
}
.faq-item.open .faq-q::after { transform: rotate(45deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.faq-a-inner {
  padding: 0 16px 14px;
  color: var(--text-soft);
  font-size: 0.88rem;
  line-height: 1.78;
}

.seo-prose {
  max-width: 100%;
}
.seo-prose h3 {
  font-size: 1.08rem;
  margin: 28px 0 10px;
  color: var(--text);
}
.seo-prose h3:first-child { margin-top: 0; }
.seo-prose p {
  color: var(--text-soft);
  font-size: 0.92rem;
  margin-bottom: 12px;
  line-height: 1.88;
}
.text-columns {
  display: grid;
  gap: 18px;
}
.text-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px 18px;
}
.text-panel h4 {
  font-size: 0.95rem;
  margin-bottom: 8px;
  color: var(--cyan);
}
.text-panel p {
  color: var(--text-soft);
  font-size: 0.87rem;
  line-height: 1.78;
}
.showcase-row {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}
.showcase-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.25s;
}
.showcase-card:hover { border-color: var(--border-rose); }
.showcase-card img { width: 100%; aspect-ratio: 9/16; object-fit: cover; object-position: top; }
.showcase-card figcaption {
  padding: 12px 14px;
  font-size: 0.82rem;
  color: var(--text-soft);
  line-height: 1.65;
  border-top: 1px solid var(--border);
}
.showcase-card figcaption strong {
  display: block;
  color: var(--text);
  font-size: 0.88rem;
  margin-bottom: 4px;
}
.compare-table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 0.86rem;
}
.compare-table th,
.compare-table td {
  padding: 11px 14px;
  border: 1px solid var(--border);
  text-align: left;
}
.compare-table th {
  background: var(--bg-card);
  color: var(--rose);
  font-weight: 600;
}
.compare-table td { color: var(--text-soft); }
.compare-table tr:nth-child(even) td { background: rgba(255,255,255,0.02); }

.cta-band {
  text-align: center;
  padding: 36px 20px;
  background: linear-gradient(135deg, rgba(194, 37, 92, 0.1), rgba(34, 184, 207, 0.06));
  border-radius: var(--radius);
  border: 1px solid var(--border-rose);
  margin-top: 32px;
}
.cta-band h3 { margin-bottom: 8px; font-size: 1.1rem; }
.cta-band p { color: var(--text-soft); font-size: 0.9rem; margin-bottom: 16px; }
.btn-primary {
  display: inline-block;
  padding: 11px 28px;
  background: var(--gradient-btn);
  color: #fff;
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: 24px;
  border: none;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.2s;
}
.btn-primary:hover { opacity: 0.92; color: #fff; transform: translateY(-1px); }

/* ===== SUBPAGE ===== */
.page-hero {
  padding: 32px 0 24px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 28px;
}
.page-hero h1 { font-size: clamp(1.4rem, 4vw, 1.9rem); margin-bottom: 8px; }
.page-hero p { color: var(--text-soft); font-size: 0.9rem; }
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 14px;
}
.breadcrumb a { color: var(--text-soft); }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb span { color: var(--text-dim); }
.legal-body h2 {
  font-size: 1.05rem;
  margin: 26px 0 10px;
  color: var(--text);
}
.legal-body h2:first-child { margin-top: 0; }
.legal-body p,
.legal-body li {
  color: var(--text-soft);
  font-size: 0.9rem;
  margin-bottom: 10px;
}
.legal-body ul { margin: 8px 0 14px 18px; list-style: disc; }
.legal-body li { margin-bottom: 6px; }

.error-page {
  text-align: center;
  padding: 48px 0 64px;
}
.error-code {
  font-size: 5rem;
  font-weight: 900;
  line-height: 1;
  background: var(--gradient-btn);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}
.error-page h1 { font-size: 1.3rem; margin-bottom: 10px; }
.error-page p { color: var(--text-soft); margin-bottom: 20px; font-size: 0.92rem; }
.error-links { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.error-links a {
  padding: 9px 20px;
  border-radius: 20px;
  border: 1px solid var(--border-rose);
  color: var(--text-soft);
  font-size: 0.88rem;
}
.error-links a:hover { background: rgba(230, 73, 128, 0.1); color: var(--text); }

/* ===== FOOTER ===== */
.site-footer {
  background: var(--bg-panel);
  border-top: 1px solid var(--border);
  padding: 36px 0 28px;
  margin-top: 20px;
}
.footer-grid {
  display: grid;
  gap: 24px;
  margin-bottom: 24px;
}
.footer-brand p {
  color: var(--text-dim);
  font-size: 0.84rem;
  margin-top: 10px;
  line-height: 1.7;
}
.footer-nav h4 {
  font-size: 0.82rem;
  color: var(--text-soft);
  margin-bottom: 10px;
  letter-spacing: 0.06em;
}
.footer-nav a {
  display: block;
  color: var(--text-dim);
  font-size: 0.84rem;
  padding: 4px 0;
}
.footer-nav a:hover { color: var(--cyan); }
.footer-bottom {
  padding-top: 18px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* ===== RESPONSIVE ===== */
@media (min-width: 640px) {
  #ads > div,
  #ads-sticky-inner > div { width: calc(12.5% - 10px); }
  .stats-band { grid-template-columns: repeat(4, 1fr); }
  .feature-row { grid-template-columns: repeat(2, 1fr); }
  .gallery-duo { grid-template-columns: 1fr 1fr; }
  .channel-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
  .text-columns { grid-template-columns: repeat(2, 1fr); }
  .showcase-row { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 768px) {
  .nav-desktop { display: flex; }
  .menu-toggle { display: none; }
  .hero-layout {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
  .hero-stack {
    width: 100%;
    height: 480px;
    margin-inline: 0;
  }
  .content-ratio {
    grid-template-columns: 3fr 7fr;
    gap: 36px;
    align-items: start;
  }
  .content-ratio.reverse { direction: rtl; }
  .content-ratio.reverse > * { direction: ltr; }
  .feature-row { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 960px) {
  .channel-grid { grid-template-columns: repeat(3, 1fr); }
  .text-columns.cols-3 { grid-template-columns: repeat(3, 1fr); }
  .showcase-row { grid-template-columns: repeat(4, 1fr); }
}