:root {
  --bg: #070d1a;
  --card: #131c30;
  --text: #e8eefc;
  --muted: #aab6d3;
  --brand: #52d8ff;
  --brand-2: #7f6bff;
  --brand-hover: #2ebae8;
  --line: #223152;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: radial-gradient(1200px 600px at 10% -20%, #133264 0%, transparent 50%),
              radial-gradient(900px 500px at 90% 0%, #2e1d67 0%, transparent 52%),
              linear-gradient(180deg, var(--bg), #0d1430);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}

.fx-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -2;
  background-image:
    linear-gradient(rgba(120, 160, 255, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 160, 255, 0.12) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(circle at 50% 35%, black 38%, transparent 80%);
  animation: gridShift 24s linear infinite;
}

.fx-glow {
  position: fixed;
  width: 560px;
  height: 560px;
  border-radius: 50%;
  filter: blur(60px);
  pointer-events: none;
  z-index: -1;
  opacity: 0.25;
}

.fx-glow.one {
  background: #2f8fff;
  top: -180px;
  left: -120px;
  animation: floatOne 14s ease-in-out infinite alternate;
}

.fx-glow.two {
  background: #8e58ff;
  right: -140px;
  top: 120px;
  animation: floatTwo 16s ease-in-out infinite alternate;
}

#particles {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
}

.container {
  width: min(1000px, 92vw);
  margin: 0 auto;
}

header {
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  backdrop-filter: blur(6px);
  background: rgba(7, 13, 26, 0.72);
  z-index: 10;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: 0.3px;
  text-shadow: 0 0 18px rgba(82, 216, 255, 0.35);
}

.brand img {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  object-fit: cover;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.menu a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 18px;
}

.menu a:hover,
.menu a.active {
  color: var(--text);
}

.menu a.active {
  text-shadow: 0 0 14px rgba(126, 210, 255, 0.55);
}

main {
  padding: 56px 0;
}

.hero {
  padding: 42px 28px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: linear-gradient(160deg, rgba(19, 28, 48, 0.8), rgba(16, 25, 44, 0.65));
  box-shadow: 0 18px 42px rgba(6, 15, 33, 0.55);
  transform: translateY(8px);
  opacity: 0;
  animation: reveal 0.7s ease-out forwards;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 18px;
  align-items: center;
}

.hero-art {
  display: grid;
  place-items: center;
}

.hero-art img {
  width: min(320px, 80%);
  border-radius: 22px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  box-shadow: 0 20px 42px rgba(0, 0, 0, 0.35);
}

.tech-hero {
  position: relative;
  overflow: hidden;
}

.tech-hero::after {
  content: "";
  position: absolute;
  width: 380px;
  height: 380px;
  border-radius: 999px;
  right: -120px;
  bottom: -120px;
  background: radial-gradient(circle, rgba(82, 216, 255, 0.3), transparent 70%);
  pointer-events: none;
}

.tech-grid {
  grid-template-columns: 1.15fr 0.85fr;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-top: 14px;
  flex-wrap: wrap;
}

.ghost-btn {
  display: inline-block;
  margin-top: 18px;
  color: #d8f2ff;
  text-decoration: none;
  padding: 11px 16px;
  border-radius: 10px;
  border: 1px solid rgba(130, 188, 255, 0.45);
  background: rgba(29, 51, 87, 0.35);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.ghost-btn:hover {
  transform: translateY(-2px);
  border-color: rgba(151, 211, 255, 0.8);
}

.kpi-row {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.kpi-card {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px;
  background: rgba(7, 14, 28, 0.55);
}

.kpi-card strong {
  display: block;
  font-size: 22px;
  color: #d9f7ff;
  margin-bottom: 4px;
}

.kpi-card span {
  color: var(--muted);
  font-size: 13px;
}

.hero-stack {
  display: grid;
  gap: 12px;
}

.tech-icon img {
  box-shadow: 0 0 0 1px rgba(173, 232, 255, 0.25), 0 20px 42px rgba(0, 0, 0, 0.4);
}

.terminal-card {
  border: 1px solid rgba(114, 178, 255, 0.35);
  border-radius: 12px;
  background: rgba(7, 13, 25, 0.86);
  box-shadow: inset 0 0 40px rgba(59, 100, 181, 0.15);
}

.terminal-head {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 12px;
  border-bottom: 1px solid rgba(102, 146, 209, 0.2);
}

.terminal-head span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #6ca0ff;
}

.terminal-head label {
  margin-left: 6px;
  font-size: 11px;
  color: #a6c7ff;
  letter-spacing: 0.4px;
}

.terminal-card pre {
  margin: 0;
  padding: 12px;
  color: #81e8ff;
  font-size: 12px;
  line-height: 1.6;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.tag {
  display: inline-block;
  font-size: 13px;
  color: #c6e8ff;
  border: 1px solid rgba(115, 196, 255, 0.4);
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(46, 103, 160, 0.22);
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.stat {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px;
  background: rgba(11, 20, 38, 0.65);
}

.stat strong {
  display: block;
  font-size: 22px;
  color: #d8f3ff;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.tech-panel {
  border-color: rgba(111, 159, 255, 0.35);
}

.tech-feature-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.feature-card {
  border: 1px solid rgba(84, 126, 197, 0.4);
  border-radius: 12px;
  padding: 16px;
  background: linear-gradient(170deg, rgba(17, 29, 52, 0.88), rgba(11, 19, 35, 0.82));
}

.feature-card h3 {
  margin: 0 0 8px;
  color: #d8f3ff;
}

.feature-card p {
  margin: 0;
}

.blueprint {
  position: relative;
}

.blueprint-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.bp-item {
  border: 1px solid rgba(86, 141, 219, 0.35);
  border-radius: 10px;
  padding: 14px;
  background: rgba(10, 19, 37, 0.74);
  color: #cae6ff;
}

.bp-item span {
  display: inline-block;
  min-width: 26px;
  color: #6cd9ff;
  font-weight: 700;
}

.roadmap strong {
  color: #d8f4ff;
}

.cta-panel {
  text-align: center;
}

.timeline {
  margin: 8px 0 0;
  padding-left: 18px;
  color: var(--muted);
}

.timeline li {
  margin-bottom: 8px;
}

h1 {
  margin-top: 0;
  font-size: clamp(30px, 4vw, 44px);
}

h2 {
  margin-top: 36px;
}

p {
  color: var(--muted);
  line-height: 1.7;
}

h3 {
  margin-top: 0;
}

a {
  color: #98dfff;
}

.btn {
  display: inline-block;
  margin-top: 18px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: white;
  text-decoration: none;
  padding: 12px 18px;
  border-radius: 10px;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
  box-shadow: 0 10px 24px rgba(63, 117, 255, 0.3);
}

.btn:hover {
  filter: brightness(1.07);
  transform: translateY(-2px);
  box-shadow: 0 16px 30px rgba(63, 117, 255, 0.38);
}

.card {
  margin-top: 20px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(19, 28, 48, 0.72);
  box-shadow: 0 12px 30px rgba(8, 18, 42, 0.5);
  transform: translateY(12px);
  opacity: 0;
}

.in-view {
  animation: reveal 0.7s ease-out forwards;
}

footer {
  border-top: 1px solid var(--line);
  margin-top: 48px;
  padding: 20px 0 40px;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 760px) {
  .nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .menu a {
    margin: 0 12px 0 0;
    display: inline-block;
  }

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

  .stats,
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .tech-grid,
  .kpi-row,
  .blueprint-grid,
  .tech-feature-grid {
    grid-template-columns: 1fr;
  }
}

@keyframes reveal {
  from {
    transform: translateY(14px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes floatOne {
  0% { transform: translate(0, 0); }
  100% { transform: translate(80px, 35px); }
}

@keyframes floatTwo {
  0% { transform: translate(0, 0); }
  100% { transform: translate(-90px, 55px); }
}

@keyframes gridShift {
  0% { transform: translateY(0); }
  100% { transform: translateY(42px); }
}

/* Home redesign: minimal premium tech look */
.home-minimal .fx-grid {
  opacity: 0.35;
}

.home-minimal .fx-glow {
  opacity: 0.18;
}

.minimal-main {
  padding-top: 72px;
}

.minimal-hero {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 26px;
  padding: 56px 42px;
  border-radius: 22px;
  border: 1px solid rgba(122, 160, 221, 0.26);
  background: linear-gradient(160deg, rgba(13, 22, 40, 0.92), rgba(11, 18, 33, 0.82));
}

.eyebrow {
  display: inline-block;
  margin-bottom: 12px;
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid rgba(141, 187, 255, 0.35);
  font-size: 12px;
  letter-spacing: 0.5px;
  color: #c7e9ff;
}

.hero-title {
  margin: 0 0 12px;
  font-size: clamp(34px, 4.8vw, 56px);
  line-height: 1.12;
  letter-spacing: -0.4px;
}

.hero-subtitle {
  max-width: 56ch;
  margin: 0;
  color: #b3c2df;
}

.minimal-right {
  display: grid;
  place-items: center;
}

.icon-shell {
  width: min(320px, 72%);
  padding: 18px;
  border-radius: 28px;
  border: 1px solid rgba(130, 190, 255, 0.26);
  background: radial-gradient(circle at 30% 30%, rgba(72, 127, 248, 0.26), rgba(13, 20, 35, 0.92));
  box-shadow: 0 28px 52px rgba(0, 0, 0, 0.38);
}

.icon-shell img {
  width: 100%;
  display: block;
  border-radius: 20px;
}

.minimal-metrics {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.metric-item {
  padding: 16px;
  border-radius: 14px;
  border: 1px solid rgba(106, 143, 201, 0.32);
  background: rgba(11, 19, 34, 0.7);
}

.metric-item strong {
  display: block;
  font-size: 24px;
  color: #def4ff;
}

.metric-item span {
  color: #9eb1d4;
  font-size: 13px;
}

.minimal-section {
  margin-top: 20px;
  padding: 28px;
  border-radius: 18px;
  border: 1px solid rgba(94, 130, 188, 0.28);
  background: rgba(14, 21, 38, 0.76);
}

.minimal-section h2 {
  margin: 0 0 14px;
  font-size: 26px;
  letter-spacing: -0.2px;
}

.minimal-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.minimal-cards article {
  padding: 16px;
  border-radius: 12px;
  border: 1px solid rgba(82, 118, 177, 0.34);
  background: rgba(10, 17, 30, 0.66);
}

.minimal-cards h3 {
  margin: 0 0 8px;
  color: #d6efff;
}

.minimal-cards p {
  margin: 0;
}

.minimal-cta {
  text-align: center;
}

.minimal-cta p {
  margin: 0 0 8px;
}

@media (max-width: 860px) {
  .minimal-hero {
    grid-template-columns: 1fr;
    padding: 34px 24px;
  }

  .icon-shell {
    width: min(260px, 62%);
  }

  .minimal-metrics,
  .minimal-cards {
    grid-template-columns: 1fr;
  }
}

/* ========== Home v2: 简约高级科技风 ========== */
.site-v2 {
  --hv-bg: #04060c;
  --hv-elevated: rgba(255, 255, 255, 0.035);
  --hv-border: rgba(255, 255, 255, 0.09);
  --hv-text: #eef1f7;
  --hv-muted: #8c96a8;
  --hv-accent: #4fd1c5;
  --hv-accent-soft: rgba(79, 209, 197, 0.12);
  font-family: "DM Sans", "Noto Sans SC", -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--hv-bg);
  color: var(--hv-text);
  letter-spacing: -0.01em;
}

.site-v2 .fx-grid {
  opacity: 0.22;
  animation: none;
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 20%, black 0%, transparent 72%);
}

.site-v2 .fx-glow {
  opacity: 0.12;
  filter: blur(80px);
}

.site-v2 .fx-glow.one {
  background: #2a6fd4;
  width: 480px;
  height: 480px;
}

.site-v2 .fx-glow.two {
  background: #4fd1c5;
  width: 400px;
  height: 400px;
  opacity: 0.1;
}

.site-v2 #particles {
  display: none;
}

.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.site-v2 .site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--hv-border);
  background: rgba(4, 6, 12, 0.72);
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
}

.site-v2 .nav {
  padding: 16px 0;
  max-width: 1120px;
}

.site-v2 .brand {
  text-decoration: none;
  color: var(--hv-text);
  text-shadow: none;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.02em;
}

.site-v2 .brand img {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  border: 1px solid var(--hv-border);
}

.site-v2 .brand-text {
  margin-left: 2px;
}

.site-v2 .menu a {
  margin-left: 28px;
  font-size: 14px;
  font-weight: 500;
  color: var(--hv-muted);
  transition: color 0.2s ease;
}

.site-v2 .menu a:hover {
  color: var(--hv-text);
}

.site-v2 .menu a.active {
  color: var(--hv-text);
  text-shadow: none;
}

.site-v2 .nav-cta {
  margin-left: 32px !important;
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--hv-accent-soft);
  color: var(--hv-accent) !important;
  border: 1px solid rgba(79, 209, 197, 0.35);
}

.site-v2 .nav-cta:hover {
  background: rgba(79, 209, 197, 0.2);
  color: #e8fffc !important;
}

.site-v2 main {
  padding: 0;
  position: relative;
  z-index: 1;
}

.hero-v2 {
  padding: clamp(48px, 12vw, 120px) 0 clamp(64px, 10vw, 100px);
}

.hero-v2-inner {
  max-width: 1120px;
  display: grid;
  grid-template-columns: 1fr minmax(260px, 0.9fr);
  gap: clamp(32px, 6vw, 72px);
  align-items: center;
}

.hero-kicker {
  margin: 0 0 20px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--hv-muted);
}

.hero-headline {
  margin: 0 0 24px;
  font-size: clamp(36px, 5.2vw, 58px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--hv-text);
}

.hero-headline-accent {
  background: linear-gradient(135deg, #7ee8df 0%, #4fd1c5 45%, #5b8def 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.hero-lede {
  margin: 0 0 36px;
  max-width: 42ch;
  font-size: 17px;
  line-height: 1.65;
  color: var(--hv-muted);
  font-weight: 400;
}

.hero-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

.site-v2 .btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 0;
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: #041018;
  background: linear-gradient(180deg, #6fe8dc 0%, #4fd1c5 100%);
  border: none;
  border-radius: 999px;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.25) inset, 0 12px 40px rgba(79, 209, 197, 0.22);
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.site-v2 .btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.3) inset, 0 16px 48px rgba(79, 209, 197, 0.3);
  filter: none;
}

.site-v2 .btn-secondary {
  display: inline-flex;
  align-items: center;
  padding: 14px 24px;
  font-size: 15px;
  font-weight: 500;
  color: var(--hv-text);
  text-decoration: none;
  border-radius: 999px;
  border: 1px solid var(--hv-border);
  background: var(--hv-elevated);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.site-v2 .btn-secondary:hover {
  border-color: rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.06);
}

.hero-v2-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-orbit {
  position: relative;
  width: min(340px, 85vw);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
}

.hero-orbit-ring {
  position: absolute;
  inset: 8%;
  border-radius: 50%;
  border: 1px solid rgba(79, 209, 197, 0.18);
  box-shadow: 0 0 80px rgba(79, 209, 197, 0.06);
}

.hero-icon-frame {
  position: relative;
  width: 58%;
  padding: 12px;
  border-radius: 28%;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
  border: 1px solid var(--hv-border);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.hero-icon-frame img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 22%;
}

.strip-metrics {
  border-top: 1px solid var(--hv-border);
  border-bottom: 1px solid var(--hv-border);
  background: rgba(255, 255, 255, 0.02);
}

.strip-inner {
  max-width: 1120px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  padding: 28px 0;
}

.strip-item {
  flex: 1;
  min-width: 140px;
  text-align: center;
}

.strip-value {
  display: block;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--hv-text);
  margin-bottom: 6px;
}

.strip-label {
  font-size: 13px;
  color: var(--hv-muted);
}

.strip-divider {
  width: 1px;
  height: 40px;
  background: var(--hv-border);
  flex-shrink: 0;
}

.section-features {
  padding: clamp(72px, 10vw, 120px) 0;
}

.section-head {
  margin-bottom: 48px;
  max-width: 560px;
}

.section-head.is-centered {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-head h2 {
  margin: 0 0 12px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--hv-muted);
}

.section-desc {
  margin: 0;
  font-size: 20px;
  line-height: 1.5;
  color: var(--hv-text);
  font-weight: 500;
}

.feature-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-block {
  padding: 28px;
  border-radius: 16px;
  border: 1px solid var(--hv-border);
  background: var(--hv-elevated);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.feature-block:hover {
  border-color: rgba(79, 209, 197, 0.25);
  transform: translateY(-4px);
}

.feature-num {
  display: block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--hv-accent);
  margin-bottom: 16px;
  font-variant-numeric: tabular-nums;
}

.feature-block h3 {
  margin: 0 0 12px;
  font-size: 18px;
  font-weight: 600;
  color: var(--hv-text);
}

.feature-block p {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--hv-muted);
}

/* —— 首页扩展：产品场景、协议、组织、客户端、FAQ —— */
.section-product,
.section-org,
.section-clients,
.section-faq {
  padding: clamp(56px, 8vw, 96px) 0;
  border-top: 1px solid var(--hv-border);
}

.section-protocol {
  padding: 0 0 clamp(56px, 8vw, 96px);
}

.protocol-banner {
  padding: 28px 32px;
  border-radius: 16px;
  border: 1px solid rgba(79, 209, 197, 0.22);
  background: linear-gradient(
    135deg,
    rgba(79, 209, 197, 0.08) 0%,
    rgba(91, 141, 239, 0.06) 100%
  );
}

.protocol-kicker {
  margin: 0 0 10px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--hv-accent);
}

.protocol-lede {
  margin: 0;
  font-size: 16px;
  line-height: 1.65;
  color: var(--hv-muted);
  max-width: 720px;
}

.protocol-lede strong {
  color: var(--hv-text);
  font-weight: 600;
}

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

.product-tile {
  padding: 22px 22px 24px;
  border-radius: 14px;
  border: 1px solid var(--hv-border);
  background: var(--hv-elevated);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.product-tile:hover {
  border-color: rgba(79, 209, 197, 0.22);
  transform: translateY(-2px);
}

.tile-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-bottom: 14px;
  border-radius: 12px;
  font-size: 18px;
  line-height: 1;
  background: rgba(79, 209, 197, 0.1);
  border: 1px solid rgba(79, 209, 197, 0.2);
}

.product-tile h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--hv-text);
}

.product-tile p {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--hv-muted);
}

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

.org-card {
  padding: 24px;
  border-radius: 14px;
  border: 1px solid var(--hv-border);
  background: rgba(255, 255, 255, 0.02);
}

.org-card h3 {
  margin: 0 0 10px;
  font-size: 15px;
  font-weight: 600;
  color: var(--hv-text);
}

.org-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--hv-muted);
}

.client-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: stretch;
  justify-content: center;
}

.client-pill {
  flex: 1;
  min-width: 200px;
  max-width: 320px;
  padding: 20px 22px;
  border-radius: 14px;
  border: 1px solid var(--hv-border);
  background: var(--hv-elevated);
  text-align: center;
}

.client-pill strong {
  display: block;
  margin-bottom: 6px;
  font-size: 15px;
  font-weight: 600;
  color: var(--hv-text);
}

.client-pill span {
  font-size: 13px;
  color: var(--hv-muted);
  line-height: 1.5;
}

.faq-list {
  max-width: 720px;
  margin: 0 auto;
}

.site-v2 details.faq-item {
  margin-bottom: 10px;
  padding: 0;
  border: 1px solid var(--hv-border);
  border-radius: 12px;
  background: var(--hv-elevated);
  overflow: hidden;
}

.site-v2 details.faq-item[open] {
  border-color: rgba(79, 209, 197, 0.25);
}

.site-v2 summary.faq-q {
  cursor: pointer;
  list-style: none;
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--hv-text);
}

.site-v2 summary.faq-q::-webkit-details-marker {
  display: none;
}

.site-v2 summary.faq-q::after {
  content: "";
  float: right;
  width: 8px;
  height: 8px;
  margin-top: 6px;
  border-right: 2px solid var(--hv-muted);
  border-bottom: 2px solid var(--hv-muted);
  transform: rotate(45deg);
  transition: transform 0.2s ease;
}

.site-v2 details.faq-item[open] summary.faq-q::after {
  transform: rotate(-135deg);
  margin-top: 8px;
}

.faq-a {
  margin: 0;
  padding: 0 20px 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--hv-muted);
}

.cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  align-items: center;
  margin-top: 8px;
}

.cta-links .btn-secondary {
  margin-top: 0;
}

@media (max-width: 900px) {
  .product-grid,
  .org-grid {
    grid-template-columns: 1fr;
  }

  .client-pill {
    max-width: none;
  }
}

.section-cta {
  padding: clamp(64px, 8vw, 100px) 0 clamp(100px, 12vw, 140px);
}

.cta-inner {
  max-width: 1120px;
  text-align: center;
  padding: 48px 32px;
  border-radius: 20px;
  border: 1px solid var(--hv-border);
  background: linear-gradient(180deg, rgba(79, 209, 197, 0.06) 0%, var(--hv-elevated) 100%);
}

.cta-inner h2 {
  margin: 0 0 12px;
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.cta-inner p {
  margin: 0 0 28px;
  color: var(--hv-muted);
  font-size: 16px;
}

.cta-inner .hero-cta-row {
  justify-content: center;
}

.cta-contact {
  margin: 20px 0 0;
  font-size: 15px;
  font-weight: 400;
  color: var(--hv-muted);
}

.cta-contact a {
  color: var(--hv-accent);
  text-decoration: none;
}

.cta-contact a:hover {
  text-decoration: underline;
}

.site-v2 .site-footer {
  border-top: 1px solid var(--hv-border);
  padding: 28px 0 40px;
  margin-top: 0;
}

.site-v2 .footer-inner {
  max-width: 1120px;
  font-size: 13px;
  color: var(--hv-muted);
}

.site-v2 .container {
  width: min(1120px, 92vw);
}

@media (max-width: 900px) {
  .hero-v2-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-lede {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta-row {
    justify-content: center;
  }

  .hero-v2-visual {
    order: -1;
  }

  .strip-divider {
    display: none;
  }

  .strip-inner {
    flex-direction: column;
    gap: 20px;
  }

  .feature-row {
    grid-template-columns: 1fr;
  }

  .site-v2 .menu a {
    margin-left: 16px;
  }

  .site-v2 .nav-cta {
    margin-left: 16px !important;
  }
}

/* ========== 内页（与首页 site-v2 统一） ========== */
.site-v2 main.page-main {
  padding: clamp(40px, 7vw, 80px) 0 clamp(72px, 10vw, 120px);
}

.site-v2 main.page-main--about {
  padding-top: clamp(32px, 5vw, 56px);
  padding-bottom: clamp(64px, 9vw, 100px);
}

.page-panel ul,
.about-section ul {
  margin: 0 0 14px;
  padding-left: 1.25em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--hv-muted);
}

.page-panel ul:last-child {
  margin-bottom: 0;
}

.about-section ul:last-child {
  margin-bottom: 0;
}

.page-panel li + li,
.about-section li + li {
  margin-top: 8px;
}

.about-actions {
  margin-top: 0;
}

.page-hero .page-lede strong,
.page-panel strong,
.about-section strong {
  color: var(--hv-text);
  font-weight: 600;
}

.page-panel .page-meta.is-inline-links,
.about-section .page-meta.is-inline-links {
  margin-top: 16px;
  padding-top: 0;
  border-top: none;
}

.page-hero {
  margin-bottom: 32px;
  max-width: 640px;
}

/* 关于页：单页「长卷」——一块连续曲面 + 内部分节，减少多块独立卡片感 */
.about-sheet {
  position: relative;
  border-radius: 28px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.09);
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.055) 0%,
    rgba(255, 255, 255, 0.02) 28%,
    rgba(255, 255, 255, 0.025) 100%
  );
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.05) inset,
    0 20px 56px rgba(0, 0, 0, 0.28);
}

.about-sheet-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(120px, 168px);
  align-items: center;
  gap: clamp(24px, 4vw, 44px);
  padding: clamp(32px, 5vw, 48px) clamp(24px, 4vw, 40px);
  margin: 0;
  max-width: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.about-sheet .about-sheet-hero.page-hero {
  margin-bottom: 0;
}

.about-sheet-hero::before {
  content: "";
  position: absolute;
  top: -35%;
  right: -5%;
  width: min(55%, 380px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(
    circle closest-side,
    rgba(79, 209, 197, 0.1) 0%,
    rgba(91, 141, 239, 0.04) 48%,
    transparent 72%
  );
  pointer-events: none;
}

.about-sheet-hero::after {
  content: "";
  position: absolute;
  bottom: -25%;
  left: -8%;
  width: min(38%, 240px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(
    circle closest-side,
    rgba(42, 111, 212, 0.08) 0%,
    transparent 68%
  );
  pointer-events: none;
}

.about-hero-main {
  position: relative;
  z-index: 1;
  max-width: 560px;
}

.about-hero-media {
  position: relative;
  z-index: 1;
  justify-self: end;
}

.about-hero-media .page-visual {
  margin-top: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-hero-media .page-visual img {
  width: 104px;
  height: 104px;
  border-radius: 30px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.about-sheet-body {
  padding: 0;
}

.about-section {
  padding: clamp(26px, 3.5vw, 36px) clamp(22px, 4vw, 40px);
}

.about-section + .about-section {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.about-section h2 {
  margin: 0 0 14px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--hv-muted);
}

.about-section p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--hv-muted);
}

.about-section p:last-child {
  margin-bottom: 0;
}

.about-section .page-meta {
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 13px;
  color: var(--hv-muted);
}

.about-section .page-meta.is-inline-links {
  margin-top: 16px;
  padding-top: 0;
  border-top: none;
}

.about-section--contact .page-meta {
  margin-top: 18px;
}

.about-sheet-foot {
  padding: clamp(22px, 3vw, 28px) clamp(22px, 4vw, 40px) clamp(28px, 3.5vw, 36px);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(0, 0, 0, 0.12);
}

.about-sheet-foot .hero-cta-row {
  justify-content: center;
}

@media (max-width: 720px) {
  .about-sheet-hero {
    grid-template-columns: 1fr;
    padding: 28px 20px 32px;
    text-align: center;
  }

  .about-hero-main {
    margin: 0 auto;
    max-width: 36em;
  }

  .about-hero-main .page-kicker,
  .about-hero-main h1,
  .about-hero-main .page-lede {
    text-align: center;
  }

  .about-hero-media {
    justify-self: center;
    order: -1;
  }

  .about-hero-media .page-visual img {
    width: 88px;
    height: 88px;
    border-radius: 26px;
  }

  .about-section {
    padding-left: 20px;
    padding-right: 20px;
  }

  .about-sheet-foot {
    padding-left: 20px;
    padding-right: 20px;
  }
}

.page-kicker {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--hv-muted);
}

.page-hero h1 {
  margin: 0 0 16px;
  font-size: clamp(30px, 3.8vw, 42px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--hv-text);
}

.page-lede {
  margin: 0;
  font-size: 17px;
  line-height: 1.65;
  color: var(--hv-muted);
}

.page-visual {
  margin-top: 24px;
}

.page-visual img {
  display: block;
  width: 72px;
  height: 72px;
  border-radius: 22px;
  border: 1px solid var(--hv-border);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.32);
}

.page-panel {
  border-radius: 20px;
  border: 1px solid var(--hv-border);
  background: var(--hv-elevated);
  padding: clamp(28px, 4vw, 44px);
}

.page-panel h2 {
  margin: 32px 0 12px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--hv-text);
}

.page-panel h2:first-child {
  margin-top: 0;
}

.page-panel p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--hv-muted);
}

.page-panel p:last-child {
  margin-bottom: 0;
}

.page-panel .page-meta {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--hv-border);
  font-size: 13px;
  color: var(--hv-muted);
}

.page-panel a,
.about-section a {
  color: var(--hv-accent);
  text-decoration: none;
}

.page-panel a:hover,
.about-section a:hover {
  text-decoration: underline;
}

.page-panel code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.92em;
  padding: 2px 6px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--hv-text);
}

.download-layout {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 28px;
  align-items: start;
}

@media (max-width: 600px) {
  .download-layout {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .download-layout .page-visual {
    margin: 0 auto;
  }
}

.download-layout .page-visual img {
  width: 96px;
  height: 96px;
  border-radius: 28px;
}

.download-layout > div > h2:first-of-type {
  margin-top: 0;
}

.download-layout .hero-cta-row {
  margin-top: 12px;
}

.page-panel .download-hint {
  margin: 12px 0 0;
  padding: 0;
  border: none;
  font-size: 13px;
  line-height: 1.65;
  color: var(--hv-muted);
}

/* ========== 法律页（隐私政策等）：长文档 + 目录导航 ========== */
.site-v2 main.page-main--legal {
  padding-top: clamp(28px, 4vw, 48px);
  padding-bottom: clamp(64px, 9vw, 100px);
}

.legal-sheet {
  position: relative;
  border-radius: 28px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.09);
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.055) 0%,
    rgba(255, 255, 255, 0.02) 22%,
    rgba(255, 255, 255, 0.025) 100%
  );
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.05) inset,
    0 20px 56px rgba(0, 0, 0, 0.28);
}

.legal-hero {
  margin: 0;
  max-width: none;
  padding: clamp(28px, 4vw, 44px) clamp(22px, 4vw, 40px) clamp(20px, 3vw, 28px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.legal-sheet .legal-hero.page-hero {
  margin-bottom: 0;
  max-width: none;
}

.legal-badge {
  display: inline-block;
  margin: 0 0 14px;
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--hv-accent);
  border-radius: 999px;
  border: 1px solid rgba(79, 209, 197, 0.35);
  background: rgba(79, 209, 197, 0.08);
}

.legal-lead {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--hv-muted);
  max-width: 52em;
}

.legal-lead strong {
  color: var(--hv-text);
  font-weight: 600;
}

.legal-meta {
  margin: 0;
  font-size: 13px;
  color: var(--hv-muted);
  opacity: 0.95;
}

.legal-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  padding: 18px clamp(18px, 3vw, 28px) 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(0, 0, 0, 0.14);
}

.legal-toc a {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 500;
  color: var(--hv-muted);
  text-decoration: none;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.04);
  transition:
    color 0.2s ease,
    border-color 0.2s ease,
    background 0.2s ease;
}

.legal-toc a:hover {
  color: var(--hv-text);
  border-color: rgba(79, 209, 197, 0.35);
  background: rgba(79, 209, 197, 0.08);
}

.legal-body {
  padding: 0;
}

.legal-section {
  scroll-margin-top: 88px;
  padding: clamp(26px, 3.5vw, 34px) clamp(22px, 4vw, 40px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.legal-section:last-of-type {
  border-bottom: none;
}

.legal-section h2 {
  margin: 0 0 14px;
  font-size: clamp(17px, 2vw, 19px);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.35;
  color: var(--hv-text);
}

.legal-section h3 {
  margin: 22px 0 10px;
  font-size: 15px;
  font-weight: 600;
  color: var(--hv-text);
}

.legal-section h3:first-of-type {
  margin-top: 8px;
}

.legal-section p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--hv-muted);
}

.legal-section p:last-child {
  margin-bottom: 0;
}

.legal-section ul {
  margin: 0 0 14px;
  padding-left: 1.25em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--hv-muted);
}

.legal-section ul:last-child {
  margin-bottom: 0;
}

.legal-section li + li {
  margin-top: 8px;
}

.legal-section strong {
  color: var(--hv-text);
  font-weight: 600;
}

.legal-section a {
  color: var(--hv-accent);
  text-decoration: none;
}

.legal-section a:hover {
  text-decoration: underline;
}

.legal-foot {
  padding: clamp(22px, 3vw, 28px) clamp(22px, 4vw, 40px) clamp(26px, 3.5vw, 34px);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(0, 0, 0, 0.14);
}

.legal-foot-actions {
  justify-content: center;
  flex-wrap: wrap;
}

@media (max-width: 640px) {
  .legal-toc {
    gap: 6px;
    padding-left: 16px;
    padding-right: 16px;
  }

  .legal-toc a {
    font-size: 11px;
    padding: 5px 10px;
  }

  .legal-section {
    padding-left: 18px;
    padding-right: 18px;
  }

  .legal-hero {
    padding-left: 18px;
    padding-right: 18px;
  }

  .legal-foot {
    padding-left: 18px;
    padding-right: 18px;
  }
}