:root {
  --bg: #06101d;
  --bg-soft: #0a1726;
  --panel: #0d1d2e;
  --panel-2: #10243a;
  --line: rgba(125, 211, 252, 0.16);
  --line-strong: rgba(45, 226, 230, 0.38);
  --text: #eef7ff;
  --muted: #8ba6bd;
  --muted-2: #66839c;
  --cyan: #2de2e6;
  --teal: #37ffb0;
  --amber: #ffd166;
  --danger: #ff7a90;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(circle at 12% 0%, rgba(45, 226, 230, 0.14), transparent 30rem),
    radial-gradient(circle at 88% 8%, rgba(55, 255, 176, 0.08), transparent 26rem),
    var(--bg);
  color: var(--text);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

img, video { max-width: 100%; }

.wrap {
  width: min(1240px, calc(100% - 48px));
  margin: 0 auto;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 0 18px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  display: grid;
  place-items: center;
  box-shadow: 0 0 24px rgba(45, 226, 230, 0.18);
}

.brand-mark::before {
  content: "";
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 18px var(--cyan);
}

.brand-copy strong { display: block; font-size: 18px; letter-spacing: 0.12em; }
.brand-copy small { display: block; margin-top: 3px; font-size: 8px; letter-spacing: 0.28em; color: var(--muted); }

.top-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--muted);
  font-size: 12px;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(13, 29, 46, 0.72);
}

.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 12px var(--teal);
}

.hero {
  display: grid;
  grid-template-columns: 1.04fr 0.96fr;
  gap: 54px;
  align-items: center;
  padding: 82px 0 58px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--cyan);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.22em;
  margin-bottom: 20px;
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
}

h1 {
  margin: 0;
  font-size: clamp(46px, 6vw, 82px);
  line-height: 1.03;
  letter-spacing: -0.06em;
}

h1 em {
  color: var(--cyan);
  font-style: normal;
  text-shadow: 0 0 38px rgba(45, 226, 230, 0.28);
}

.hero-lead {
  margin: 24px 0 0;
  color: #b8cce0;
  font-size: 18px;
  line-height: 1.8;
}

.hero-note {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 12px;
  border: 1px solid var(--line);
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
  background: rgba(13, 29, 46, 0.8);
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.btn:hover { transform: translateY(-2px); border-color: var(--line-strong); }

.btn.primary {
  color: #041019;
  border-color: transparent;
  background: linear-gradient(135deg, var(--cyan), var(--teal));
  box-shadow: 0 12px 34px rgba(45, 226, 230, 0.18);
}

.btn.ghost { color: #c8e2f2; }

.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin-top: 34px;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  background: var(--line);
}

.metric {
  padding: 16px 18px;
  background: rgba(8, 22, 37, 0.92);
}

.metric strong {
  display: block;
  font-size: 24px;
  letter-spacing: -0.03em;
}

.metric span {
  display: block;
  margin-top: 5px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.5;
}

.hero-visual {
  position: relative;
  min-height: 480px;
  isolation: isolate;
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: 12% 4% 8% 8%;
  background: radial-gradient(circle, rgba(45, 226, 230, 0.16), transparent 62%);
  filter: blur(18px);
  z-index: -1;
}

.screen-card {
  position: absolute;
  overflow: hidden;
  border: 1px solid rgba(125, 211, 252, 0.22);
  border-radius: 16px;
  background: #07111f;
  box-shadow: var(--shadow);
}

.screen-card img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: top center;
}

.screen-card.host {
  inset: 0 0 auto 0;
  width: 88%;
  aspect-ratio: 1.47;
  transform: rotate(-1.4deg);
}

.screen-card.guest {
  right: 0;
  bottom: 8%;
  width: 46%;
  aspect-ratio: 1.47;
  border-color: rgba(55, 255, 176, 0.34);
  transform: rotate(2.4deg);
}

.screen-label {
  position: absolute;
  left: 12px;
  top: 12px;
  padding: 6px 9px;
  border-radius: 7px;
  background: rgba(4, 16, 25, 0.78);
  color: #dff8ff;
  font-size: 10px;
  letter-spacing: 0.08em;
  backdrop-filter: blur(8px);
}

.hero-quote {
  position: absolute;
  left: 2%;
  bottom: 0;
  padding: 13px 16px;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: rgba(6, 16, 29, 0.86);
  color: var(--cyan);
  font-size: 13px;
  letter-spacing: 0.08em;
  box-shadow: 0 16px 38px rgba(0, 0, 0, 0.34);
  backdrop-filter: blur(10px);
}

section {
  padding: 76px 0;
  border-top: 1px solid var(--line);
}

.section-kicker {
  color: var(--cyan);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.section-title {
  max-width: 920px;
  margin: 12px 0 0;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.18;
  letter-spacing: -0.04em;
}

.section-lead {
  max-width: 820px;
  margin: 18px 0 0;
  color: #abc1d4;
  font-size: 16px;
  line-height: 1.8;
}

.cards-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 32px;
}

.card {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: linear-gradient(160deg, rgba(16, 36, 58, 0.82), rgba(8, 22, 37, 0.82));
}

.card .num {
  color: var(--cyan);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.card h3 {
  margin: 18px 0 10px;
  font-size: 19px;
  letter-spacing: -0.02em;
}

.card p {
  margin: 0;
  color: #9fb8cc;
  font-size: 13px;
  line-height: 1.75;
}

.shots {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 18px;
  margin-top: 32px;
}

.shot {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
}

.shot img {
  width: 100%;
  display: block;
  aspect-ratio: 1.47;
  object-fit: cover;
  object-position: top center;
}

.shot figcaption {
  padding: 14px 16px 16px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.65;
}

.shot figcaption strong { color: var(--text); }

.video-shell {
  margin-top: 32px;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 18px;
  background: #030a12;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.4);
}

.video-shell video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #030a12;
}

.video-caption {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  padding: 14px 18px;
  color: var(--muted);
  font-size: 12px;
  border-top: 1px solid var(--line);
}

.evidence-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 32px;
}

.evidence {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(8, 22, 37, 0.78);
}

.evidence.valid { border-color: rgba(55, 255, 176, 0.3); }
.evidence.invalid { border-color: rgba(255, 209, 102, 0.28); }

.evidence h3 {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 16px;
  font-size: 16px;
}

.evidence h3 .tag {
  padding: 4px 8px;
  border-radius: 999px;
  font-size: 10px;
  letter-spacing: 0.08em;
}

.evidence.valid h3 .tag { background: rgba(55, 255, 176, 0.12); color: var(--teal); }
.evidence.invalid h3 .tag { background: rgba(255, 209, 102, 0.12); color: var(--amber); }

.evidence ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.evidence li {
  position: relative;
  padding-left: 17px;
  color: #a9c0d3;
  font-size: 13px;
  line-height: 1.65;
}

.evidence li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.8;
}

.evidence.valid li::before { color: var(--teal); }
.evidence.invalid li::before { color: var(--amber); }

.quote {
  margin-top: 32px;
  padding: 26px 30px;
  border-left: 3px solid var(--cyan);
  border-radius: 0 16px 16px 0;
  background: linear-gradient(90deg, rgba(45, 226, 230, 0.08), rgba(13, 29, 46, 0.4));
  color: #d8e9f5;
  font-size: 20px;
  line-height: 1.7;
}

.cta {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
  margin: 32px 0 0;
  padding: 30px;
  border: 1px solid var(--line-strong);
  border-radius: 18px;
  background:
    radial-gradient(circle at 100% 0%, rgba(45, 226, 230, 0.16), transparent 18rem),
    rgba(13, 29, 46, 0.86);
}

.cta h3 { margin: 0; font-size: 24px; letter-spacing: -0.03em; }
.cta p { margin: 8px 0 0; color: var(--muted); font-size: 13px; line-height: 1.7; }

.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  padding: 30px 0 46px;
  border-top: 1px solid var(--line);
  color: var(--muted-2);
  font-size: 12px;
  line-height: 1.7;
}

.placeholder {
  color: var(--amber);
  border-bottom: 1px dotted rgba(255, 209, 102, 0.6);
}

@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; gap: 36px; padding-top: 58px; }
  .hero-visual { min-height: 420px; }
  .cards-3, .shots, .evidence-grid { grid-template-columns: 1fr; }
  .cta { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .wrap { width: min(100% - 28px, 1240px); }
  .topbar { align-items: flex-start; gap: 14px; }
  .top-meta { flex-direction: column; align-items: flex-end; gap: 7px; }
  .hero { padding-top: 46px; }
  h1 { font-size: 46px; }
  .hero-lead { font-size: 16px; }
  .metrics { grid-template-columns: 1fr 1fr; }
  .hero-visual { min-height: 330px; }
  .screen-card.host { width: 96%; }
  .screen-card.guest { width: 52%; bottom: 4%; }
  .hero-quote { font-size: 11px; }
  section { padding: 58px 0; }
  .section-title { font-size: 32px; }
  .quote { font-size: 16px; padding: 20px; }
}