:root {
  --bg-start: #080a1f;
  --bg-end: #0f193a;
  --surface: rgba(15, 26, 55, 0.82);
  --surface-strong: rgba(20, 30, 64, 0.9);
  --border: rgba(102, 126, 234, 0.32);
  --text-primary: rgba(236, 243, 255, 0.98);
  --text-secondary: rgba(191, 210, 255, 0.82);
  --text-on-surface: rgba(236, 244, 255, 0.96);
  --accent-start: #7c3aed;
  --accent-end: #22d3ee;
  --accent-hover: #4338ca;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial;
  color: var(--text-on-surface);
  background: linear-gradient(180deg, var(--bg-start) 0%, var(--bg-end) 100%);
  padding-top: 64px;
}

.site-header {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 20px;
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: linear-gradient(98deg, #6817d3 0%, #290d5e 35%, #292b71 65%, #454fa4 100%);
  border-bottom: 1px solid transparent;
  backdrop-filter: saturate(220%) blur(24px);
}
.site-header::before {
  content:'';
  position:absolute; left:0; right:0; bottom:-1px; height:2px;
  background: linear-gradient(90deg, rgba(115,68,255,1) 0%, rgba(70,120,255,1) 48%, rgba(86,226,255,0.95) 100%);
  box-shadow: 0 0 26px rgba(128,232,255,0.65), 0 12px 30px rgba(35,82,255,0.38);
}
.brand { display:flex; align-items:center; gap:12px; }
.brand-mark { font-weight: 700; color: #fff; letter-spacing: 0.3px; }
.brand-sub { color: rgba(248, 250, 252, 0.86); font-size: 12px; }
/* Header device ribbon */
.device-ribbon { display:inline-flex; align-items:center; gap:8px; margin-left: 8px; }
.device-ribbon .device-badge { font-size: 12px; padding: 5px 10px; border-radius: 999px; background: linear-gradient(120deg, rgba(120,70,255,0.32), rgba(0,200,255,0.32)); border: 1px solid rgba(140,180,255,0.45); color: #d8efff; box-shadow: 0 6px 18px rgba(43,197,255,0.22); }

.top-nav { display:flex; align-items:center; gap:8px; }
.top-nav a {
  display:inline-block; padding:10px 14px; border-radius: 12px;
  color: rgba(208, 218, 240, 0.78); text-decoration: none; font-size: 14px;
  transition: background .18s ease, color .18s ease, box-shadow .18s ease;
}
.top-nav a:hover { background: rgba(125, 211, 252, 0.24); color: #fff; }
.top-nav a.active {
  color: #c4f1ff;
  background: linear-gradient(140deg, rgba(94,58,255,0.55) 0%, rgba(57,123,255,0.58) 45%, rgba(43,197,255,0.48) 100%);
  box-shadow: 0 16px 32px rgba(43, 170, 255, 0.42);
}

.cta-group { display:flex; align-items:center; gap:8px; }
.btn { border-radius:12px; padding:10px 14px; border: 1px solid rgba(99, 102, 241, 0.32); color: var(--text-primary); background: var(--surface); text-decoration: none; }
.btn:hover { border-color: rgba(125,211,252,0.45); color: #c4f1ff; }
.btn-primary { background: linear-gradient(90deg, var(--accent-start), var(--accent-end)); color:#fff; border:none; }
.btn-primary:hover { filter: brightness(1.05); }

.content { padding: 16px; }

/* 首屏大气广告：四大功能永久免费 */
.hero-banner-free {
  width: 100%;
  margin-bottom: 24px;
  padding: 48px 24px 56px;
  border-radius: 20px;
  background: linear-gradient(145deg, rgba(20, 28, 60, 0.95) 0%, rgba(12, 22, 52, 0.98) 50%, rgba(8, 18, 42, 0.98) 100%);
  border: 1px solid rgba(124, 58, 237, 0.35);
  box-shadow: 0 0 0 1px rgba(34, 211, 238, 0.12),
              0 24px 48px rgba(0, 12, 32, 0.45),
              inset 0 1px 0 rgba(255, 255, 255, 0.04);
  position: relative;
  overflow: hidden;
}
.hero-banner-free::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -20%;
  width: 80%;
  height: 180%;
  background: radial-gradient(ellipse, rgba(124, 58, 237, 0.18) 0%, transparent 65%);
  pointer-events: none;
}
.hero-banner-free::after {
  content: '';
  position: absolute;
  bottom: -30%;
  right: -15%;
  width: 60%;
  height: 120%;
  background: radial-gradient(ellipse, rgba(34, 211, 238, 0.12) 0%, transparent 60%);
  pointer-events: none;
}
.hero-banner-inner { position: relative; z-index: 1; max-width: 1000px; margin: 0 auto; text-align: center; }
.hero-banner-tagline {
  font-size: 14px;
  letter-spacing: 0.2em;
  color: rgba(196, 241, 255, 0.9);
  margin: 0 0 12px;
  text-transform: uppercase;
}
.hero-banner-title {
  font-size: clamp(28px, 5vw, 42px);
  font-weight: 800;
  color: #fff;
  margin: 0 0 12px;
  line-height: 1.25;
  letter-spacing: 0.02em;
}
.hero-banner-highlight {
  background: linear-gradient(90deg, #a78bfa, #22d3ee);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-fill-color: transparent;
}
.hero-banner-desc {
  font-size: 16px;
  color: rgba(191, 210, 255, 0.85);
  margin: 0 0 32px;
}
.hero-banner-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 28px;
}
.hero-banner-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 24px 16px;
  border-radius: 16px;
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid rgba(124, 58, 237, 0.28);
  text-decoration: none;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.hero-banner-card:hover {
  transform: translateY(-4px);
  border-color: rgba(34, 211, 238, 0.5);
  box-shadow: 0 12px 32px rgba(34, 211, 238, 0.15);
}
.hero-banner-card-name {
  font-size: 17px;
  font-weight: 700;
  color: #e8f5ff;
}
.hero-banner-card-badge {
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(124, 58, 237, 0.5), rgba(34, 211, 238, 0.5));
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.25);
  box-shadow: 0 4px 14px rgba(34, 211, 238, 0.25);
}
.hero-banner-cta { margin-top: 8px; }
.btn-lg { padding: 14px 28px; font-size: 16px; font-weight: 600; border-radius: 14px; }

@media (max-width: 900px) {
  .hero-banner-cards { grid-template-columns: repeat(2, 1fr); }
  .hero-banner-free { padding: 36px 16px 44px; }
}
@media (max-width: 520px) {
  .hero-banner-cards { grid-template-columns: 1fr; }
  .hero-banner-free { padding: 28px 12px 36px; }
  .hero-banner-title { font-size: 26px; }
}

.hero {
  min-height: 16vh;
  display:flex; flex-direction: column; align-items: flex-start; justify-content: center;
  gap: 8px; padding: 14px; border-radius: 14px;
  background: var(--surface-strong);
  box-shadow: inset 0 0 0 1px rgba(79, 113, 196, 0.25), 0 18px 36px rgba(7, 11, 27, 0.35);
}
.hero h1 { font-size: 28px; margin: 0; color: #fff; }
.hero .sub { color: var(--text-secondary); margin: 0; }
.hero-cta { display:flex; gap:10px; }

/* 痛点 Hero 扩展样式 */
.hero-pain { background: linear-gradient(135deg, rgba(16,24,48,0.92), rgba(18,30,60,0.92)); border: 1px solid rgba(110, 140, 210, 0.35); }
/* 文案段落的增强排版 */
.hero-pain .rich-text p { margin: 8px 0; }
.hero-pain .rich-text .lead { font-size: 16px; color: var(--text-primary); }
.bullet-list { margin: 6px 0 8px; padding-left: 18px; color: var(--text-on-surface); }
.bullet-list li { margin: 6px 0; }
.bullet-list strong { color: #c9f2ff; }
.badges { display:flex; flex-wrap: wrap; gap: 8px; margin: 2px 0 6px; }

.video-showcase { width: 100%; margin-top: 12px; }
.video-frame { border-radius: 14px; padding: 12px; background: rgba(15,23,42,0.9); border: 1px solid var(--border); box-shadow: 0 16px 32px rgba(7, 11, 27, 0.32); }
.video-placeholder { height: 180px; display:flex; align-items:center; justify-content:center; color: var(--text-secondary); background: linear-gradient(140deg, rgba(94,58,255,0.18) 0%, rgba(57,123,255,0.18) 45%, rgba(43,197,255,0.16) 100%); border-radius: 10px; }
.preview-svg { width: 100%; height: 100%; display: block; border-radius: 10px; }

.section { margin-top: 24px; padding: 20px; border-radius: 14px; background: var(--surface); box-shadow: 0 18px 36px rgba(7, 11, 27, 0.35); border: 1px solid var(--border); }
.section h2 { margin-top: 0; color: #fff; }
/* 紧凑型内容区：用于 demo 幻灯片区域减少上下留白 */
.section.section-compact { padding: 14px; }

.cards { display:grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; }
.card { border: 1px solid var(--border); border-radius: 12px; padding: 14px; background: rgba(15,23,42,0.9); }
.card h3 { margin-top:0; color:#fff; }
.card p { margin-bottom:0; color: var(--text-on-surface); }

.stats { background: var(--surface-strong); }
.stats-grid { display:grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; }
.stat-item { border: 1px solid var(--border); border-radius: 12px; padding: 16px; background: rgba(17,24,39,0.92); text-align: center; }
.stat-value { font-size: 22px; font-weight: 700; color: #fff; }
.stat-label { color: var(--text-secondary); margin-top: 6px; }

.links { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 10px; }
.links a { color: #93c5fd; text-decoration: none; }
.links a:hover { color: #bfdbfe; }

.testimonials { display:grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 12px; }
.testimonial-card { border: 1px solid var(--border); border-radius: 12px; padding: 14px; background: rgba(17,24,39,0.92); box-shadow: 0 14px 28px rgba(7, 11, 27, 0.28); }
.testimonial-card .quote { color: var(--text-on-surface); margin: 0 0 8px; }
.testimonial-card .meta { color: var(--text-secondary); font-size: 12px; }

.trust-badges { display:flex; flex-wrap: wrap; gap: 8px; margin-bottom: 10px; }
.badge { padding: 8px 10px; border-radius: 999px; background: rgba(17,24,39,0.92); border: 1px solid var(--border); color: #c4f1ff; }
.trust-note { color: var(--text-secondary); }

.site-footer { margin-top: 24px; padding: 16px 20px; border-top: 1px solid var(--border); background: rgba(10, 16, 32, 0.62); }
.footer-inner { display:flex; align-items:center; justify-content: space-between; color: var(--text-secondary); }
/* ICP only footer centered */
.icp-info { text-align: center; opacity: 0.06; }
.icp-info a { color: rgba(255, 255, 255, 0.12); text-decoration: none; cursor: default; pointer-events: none; }
.icp-info a:hover { color: rgba(255, 255, 255, 0.12); }

.fixed-bar { position: fixed; left: 0; right: 0; bottom: 0; z-index: 20; backdrop-filter: saturate(220%) blur(14px); background: rgba(14, 18, 34, 0.78); border-top: 1px solid var(--border); }
.bar-inner { display:flex; align-items:center; justify-content: space-between; gap: 10px; padding: 10px 14px; }
.bar-text { color: var(--text-secondary); }

/* 微动效：渐变线条轻流动 */
@keyframes pulseLine {
  0% { box-shadow: 0 0 18px rgba(128,232,255,0.35); }
  50% { box-shadow: 0 0 26px rgba(128,232,255,0.65); }
  100% { box-shadow: 0 0 18px rgba(128,232,255,0.35); }
}
.site-header::before { animation: pulseLine 2.4s ease-in-out infinite; }

/* Particle canvas behind content */
.bg-canvas { position: fixed; inset: 0; z-index: 0; }

/* Device support strip */
.devices { display:flex; gap:12px; align-items:center; justify-content:center; margin: 6px 0 6px; }
.device-badge {
  font-size: 13px; padding: 6px 12px; border-radius: 999px;
  background: linear-gradient(120deg, rgba(120, 70, 255, 0.28), rgba(0, 200, 255, 0.28));
  border: 1px solid rgba(140, 180, 255, 0.42); color: #d8efff; backdrop-filter: blur(6px);
  box-shadow: 0 6px 18px rgba(43, 197, 255, 0.22);
}

/* Ensure content sits above canvas */
.content, .site-footer, .fixed-bar { position: relative; z-index: 10; }

/* Responsive enhancements */
@media (max-width: 1024px) {
  body { padding-top: 58px; }
  .site-header { height: 58px; padding: 0 16px; }
  .hero { min-height: 14vh; }
  .hero h1 { font-size: 26px; }
  .video-placeholder { height: 160px; }
}

@media (max-width: 768px) {
  .top-nav { flex-wrap: wrap; justify-content: center; }
  .brand-sub { font-size: 11px; }
  .hero { min-height: 12vh; }
  .hero h1 { font-size: 24px; }
  .cards { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
  .bar-inner { flex-wrap: wrap; }
  .device-ribbon { margin-left: 6px; }
}

@media (max-width: 480px) {
  .brand-sub { display:none; }
  .hero h1 { font-size: 21px; }
  .video-placeholder { height: 140px; }
  .device-badge { font-size: 12px; padding: 5px 9px; }
  .device-ribbon .device-badge { font-size: 11px; padding: 4px 8px; }
}

/* --- Corporate strength sections --- */
.section { padding: 48px 20px; }
.section h2 { font-size: 22px; color: #eaf6ff; margin-bottom: 16px; letter-spacing: 0.2px; }
.section .subnote { color: rgba(235, 249, 255, 0.7); font-size: 13px; margin-bottom: 24px; }

.metrics-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.metric-card { background: rgba(22, 28, 46, 0.6); border: 1px solid rgba(68, 100, 170, 0.35); border-radius: 14px; padding: 18px; box-shadow: 0 12px 30px rgba(0, 20, 40, 0.25); backdrop-filter: blur(6px); }
.metric-value { font-size: 28px; font-weight: 700; color: #c9f2ff; }
.metric-label { font-size: 13px; color: rgba(215, 235, 255, 0.8); margin-top: 6px; }

.advantages { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.adv-card { background: rgba(16, 22, 36, 0.55); border: 1px solid rgba(88, 120, 190, 0.32); border-radius: 14px; padding: 16px; }
.adv-card h3 { font-size: 16px; color: #d9eeff; margin-bottom: 8px; }
.adv-card p { font-size: 13px; color: rgba(220, 240, 255, 0.85); }

.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.team-card { background: rgba(12, 18, 32, 0.6); border: 1px solid rgba(82, 120, 200, 0.3); border-radius: 14px; padding: 16px; text-align: center; }
.team-avatar { width: 64px; height: 64px; border-radius: 50%; margin: 0 auto 10px; background: linear-gradient(135deg, rgba(124,58,237,0.3), rgba(34,211,238,0.3)); border: 1px solid rgba(124,58,237,0.6); box-shadow: 0 8px 22px rgba(34,211,238,0.18); }
.team-name { font-size: 15px; color: #e8f5ff; font-weight: 600; }
.team-role { font-size: 12px; color: rgba(220, 240, 255, 0.75); margin-top: 4px; }
.team-tags { display:flex; flex-wrap: wrap; gap:6px; justify-content:center; margin-top:8px; }
.team-tag { font-size: 11px; padding: 4px 8px; border-radius: 999px; border: 1px solid rgba(120, 170, 255, 0.5); color: #cfe9ff; background: rgba(27, 36, 68, 0.5); }

.logo-row { display:flex; flex-wrap: wrap; gap:10px; align-items:center; }
.logo-badge { padding: 8px 12px; border-radius: 10px; border: 1px solid rgba(90, 130, 210, 0.4); background: rgba(18, 26, 48, 0.5); color: #d8eaff; font-size: 12px; }

/* Responsive tweaks */
@media (max-width: 1024px) {
  .metrics-grid { grid-template-columns: repeat(3, 1fr); }
  .team-grid { grid-template-columns: repeat(3, 1fr); }
  .advantages { grid-template-columns: repeat(2, 1fr); }
}

/* Rich text for longer paragraphs */
.rich-text { max-width: 880px; line-height: 1.8; color: rgba(230, 244, 255, 0.86); font-size: 14px; }
.rich-text p { margin: 10px 0; }

/* Awards & media */
.awards-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.award-card { background: rgba(18, 24, 40, 0.6); border: 1px solid rgba(100, 140, 210, 0.35); border-radius: 14px; padding: 14px; }
.award-title { color: #def1ff; font-size: 15px; font-weight: 600; }
.award-meta { color: rgba(210, 230, 255, 0.75); font-size: 12px; margin-top: 6px; }

/* Case study */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.case-card { background: rgba(16, 22, 36, 0.6); border: 1px solid rgba(90, 130, 210, 0.35); border-radius: 14px; padding: 16px; }
.case-title { color: #eaf6ff; font-size: 15px; font-weight: 600; }
.case-metrics { display:flex; gap:12px; margin-top:8px; }
.case-metric { background: rgba(27, 36, 68, 0.5); border: 1px solid rgba(120, 170, 255, 0.45); border-radius: 10px; padding: 6px 10px; color: #cfe9ff; font-size: 12px; }
.case-desc { margin-top:10px; color: rgba(220, 240, 255, 0.85); font-size: 13px; }

@media (max-width: 1024px) {
  .awards-grid { grid-template-columns: repeat(2, 1fr); }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .awards-grid { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .metrics-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; }
  .advantages { grid-template-columns: 1fr; }
}
/* 资源卡片样式 */
.resource-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.resource-card {
  background: rgba(14, 21, 45, 0.8);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 12px;
  padding: 16px;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.resource-card:hover {
  transform: translateY(-2px);
  border-color: rgba(34, 211, 238, 0.6);
  box-shadow: 0 6px 20px rgba(34, 211, 238, 0.12);
}
.resource-title { font-weight: 600; font-size: 16px; color: #e2e8f0; }
.resource-desc { margin-top: 8px; color: #94a3b8; font-size: 14px; }
.resource-actions { margin-top: 12px; display: flex; gap: 8px; flex-wrap: wrap; }
.resource-actions a { font-size: 13px; }

@media (max-width: 960px) {
  .resource-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .resource-grid { grid-template-columns: 1fr; }
}

/* 下载页面与首页下载区块样式 */
.download-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}
.download-card {
  background: rgba(14, 21, 45, 0.85);
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 12px;
  padding: 16px;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.download-card:hover {
  transform: translateY(-2px);
  border-color: rgba(124, 58, 237, 0.6);
  box-shadow: 0 6px 20px rgba(124, 58, 237, 0.18);
}
.download-card-header {
  display: flex; align-items: center; gap: 8px; margin-bottom: 8px;
}
.platform { font-weight: 700; color: #e2e8f0; }
.arch { font-size: 12px; padding: 4px 8px; border-radius: 999px; border: 1px solid rgba(120, 170, 255, 0.5); color: #cfe9ff; background: rgba(27, 36, 68, 0.5); }
.support-list { list-style: none; padding: 0; margin: 8px 0 0; color: #94a3b8; font-size: 14px; }
.support-list li { margin: 6px 0; }
.download-actions { margin-top: 12px; display: flex; gap: 8px; flex-wrap: wrap; }
.btn.ghost { background: transparent; border: 1px dashed rgba(99, 102, 241, 0.42); color: #cfe9ff; }
.btn.highlight { background: linear-gradient(90deg, rgba(124,58,237,0.36), rgba(34,211,238,0.36)); border: 1px solid rgba(124,58,237,0.6); }

@media (max-width: 1200px) {
  .download-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 860px) {
  .download-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 560px) {
  .download-grid { grid-template-columns: 1fr; }
}
/* --- Demo 幻灯片科技感样式 --- */
.drop-zone {
  border: 1px dashed rgba(120,130,150,0.4);
  border-radius: 12px;
  padding: 16px 20px;
  text-align: center;
  color: #8aa0b3;
  margin: 16px 0 24px;
  background: linear-gradient(180deg, rgba(30,35,40,0.6), rgba(30,35,40,0.3));
}
.drop-zone.dragging { border-color: #53b1fd; color: #cce6ff; }

.slideshow {
  position: relative;
  overflow: hidden;
  border-radius: 16px;
  background: radial-gradient(1200px 600px at 10% 10%, rgba(83,177,253,0.04), transparent),
              radial-gradient(1000px 500px at 90% 30%, rgba(16,185,129,0.03), transparent),
              linear-gradient(180deg, #0b1220, #111827);
  min-height: 520px;
}
.slideshow .glow-edge {
  position: absolute; inset: 0; pointer-events: none;
  box-shadow: 0 0 0 1px rgba(83,177,253,0.25), 0 0 32px rgba(83,177,253,0.15);
  border-radius: inherit;
}
.slides { position: absolute; inset: 0; }
.particles { position: absolute; inset: 0; pointer-events: none; }
.slide {
  position: absolute; inset: 0;
  background-size: contain; background-position: center; background-repeat: no-repeat;
  opacity: 0; transform: scale(1.01) translateZ(0);
  transition: opacity 420ms ease, transform 600ms cubic-bezier(.2,.8,.2,1);
}
.slide::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(180deg, rgba(12,20,32,0.12), rgba(12,20,32,0.22));
}
.slide.active { opacity: 1; transform: scale(1) translateZ(0); }

.nav {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 40px; height: 40px; border-radius: 999px;
  background: rgba(15,23,42,0.6);
  border: 1px solid rgba(83,177,253,0.35);
  color: #e5f4ff; display: grid; place-items: center;
  backdrop-filter: blur(6px);
}
.nav:hover { background: rgba(15,23,42,0.75); }
.nav.prev { left: 12px; }
.nav.next { right: 12px; }

.dots { position: absolute; left: 50%; bottom: 12px; transform: translateX(-50%); display: flex; gap: 8px; }
.dot {
  width: 8px; height: 8px; border-radius: 999px;
  border: 1px solid rgba(83,177,253,0.35);
  background: rgba(15,23,42,0.6);
}
.dot.active { background: #53b1fd; box-shadow: 0 0 12px rgba(83,177,253,0.6); }

@media (min-width: 768px) {
  .slideshow { min-height: 700px; }
  .nav { width: 44px; height: 44px; }
}