:root {
  --bg-stage: #0b0e14;
  --bg-deck: #121722;
  --bg-elevated: #182030;
  --bg-subtle: rgba(255, 255, 255, 0.04);
  --border-line: rgba(148, 163, 184, 0.14);
  --border-strong: rgba(148, 163, 184, 0.26);
  --ink-primary: #edf2f8;
  --ink-secondary: #94a3b8;
  --ink-muted: #64748b;
  --anamorphic-blue: #3b82f6;
  --anamorphic-blue-hover: #2563eb;
  --anamorphic-glow: rgba(59, 130, 246, 0.18);
  --tungsten-gold: #f59e0b;
  --tungsten-soft: rgba(245, 158, 11, 0.15);
  --emerald-ok: #10b981;
  --font-display: "Space Grotesk", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
}

html[data-theme="light"] {
  --bg-stage: #f6f8fb;
  --bg-deck: #ffffff;
  --bg-elevated: #eef2f8;
  --bg-subtle: rgba(15, 23, 42, 0.04);
  --border-line: rgba(15, 23, 42, 0.1);
  --border-strong: rgba(15, 23, 42, 0.2);
  --ink-primary: #0f172a;
  --ink-secondary: #475569;
  --ink-muted: #64748b;
  --anamorphic-blue: #2563eb;
  --anamorphic-blue-hover: #1d4ed8;
  --anamorphic-glow: rgba(37, 99, 235, 0.1);
  --tungsten-gold: #d97706;
  --tungsten-soft: rgba(217, 119, 6, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg-stage);
  color: var(--ink-primary);
  font-family: var(--font-body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* 双语显隐规则：默认英文，zh 模式下切换为中文；爬虫在源码中可同时读取双语合规条款 */
html[data-lang="en"] [data-i18n="zh"] {
  display: none !important;
}
html[data-lang="zh"] [data-i18n="en"] {
  display: none !important;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 顶部导航栏 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: color-mix(in srgb, var(--bg-stage) 82%, transparent);
  border-bottom: 1px solid var(--border-line);
}

.header-inner {
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.02em;
}

.brand-cube {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--anamorphic-blue), #1d4ed8);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 18px var(--anamorphic-glow);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-secondary);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--ink-primary);
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.chip-btn {
  height: 34px;
  padding: 0 12px;
  border-radius: 999px;
  border: 1px solid var(--border-line);
  background: var(--bg-deck);
  color: var(--ink-primary);
  font-size: 12px;
  font-weight: 600;
  font-family: var(--font-body);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: border-color 0.18s ease, background 0.18s ease;
}

.chip-btn:hover {
  border-color: var(--border-strong);
  background: var(--bg-elevated);
}

/* Hero 首屏：左主旨 + 右交互式光学调校台 */
.hero-section {
  padding: 72px 0 64px;
  border-bottom: 1px solid var(--border-line);
  background: radial-gradient(circle at 78% 22%, var(--anamorphic-glow), transparent 46%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid var(--border-line);
  background: var(--bg-deck);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--tungsten-gold);
  margin-bottom: 20px;
}

.eyebrow-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--tungsten-gold);
}

.hero-title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: clamp(34px, 4.4vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.03em;
}

.hero-lead {
  margin: 0 0 28px;
  font-size: 17px;
  color: var(--ink-secondary);
  max-width: 540px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-bottom: 22px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  height: 46px;
  padding: 0 22px;
  border-radius: 11px;
  background: var(--anamorphic-blue);
  color: #ffffff;
  font-weight: 600;
  font-size: 15px;
  border: none;
  cursor: pointer;
  transition: background 0.18s ease, transform 0.15s ease;
}

.btn-primary:hover {
  background: var(--anamorphic-blue-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  padding: 0 20px;
  border-radius: 11px;
  border: 1px solid var(--border-strong);
  background: var(--bg-deck);
  color: var(--ink-primary);
  font-weight: 600;
  font-size: 14px;
  transition: background 0.18s ease;
}

.btn-secondary:hover {
  background: var(--bg-elevated);
}

.trial-caption {
  font-size: 13px;
  color: var(--ink-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* 标志性交互：实时浏览器光学与声学取景器 */
.cinema-deck {
  background: var(--bg-deck);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.32);
}

.deck-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--border-line);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-secondary);
}

.deck-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--emerald-ok);
}

.deck-monitor {
  position: relative;
  height: 220px;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: linear-gradient(135deg, #0d1b2a 0%, #1b263b 48%, #2b3a55 100%);
  border: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 16px;
  transition: filter 0.28s ease, transform 0.28s ease;
}

.deck-monitor[data-mode="sharp"] {
  filter: contrast(1.22) saturate(1.18) brightness(1.06);
}

.deck-monitor[data-mode="hdr"] {
  filter: contrast(1.32) saturate(1.35) brightness(1.08);
}

.deck-monitor[data-mode="mirror"] .monitor-scene {
  transform: scaleX(-1);
}

.monitor-hud {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 11px;
  color: rgba(255, 255, 255, 0.82);
  z-index: 2;
}

.hud-pill {
  padding: 3px 8px;
  border-radius: 6px;
  background: rgba(11, 14, 20, 0.68);
  border: 1px solid rgba(255, 255, 255, 0.14);
}

.hud-pill.gold {
  color: #fcd34d;
  border-color: rgba(245, 158, 11, 0.45);
}

.monitor-scene {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.32s cubic-bezier(0.22, 1, 0.36, 1);
}

.prism-ring {
  width: 116px;
  height: 116px;
  border-radius: 26px;
  transform: rotate(18deg);
  background: conic-gradient(from 120deg, #3b82f6, #60a5fa, #f59e0b, #3b82f6);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 44px rgba(59, 130, 246, 0.38);
}

.prism-core {
  width: 84px;
  height: 84px;
  border-radius: 18px;
  background: #0b0e14;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
}

.eq-bars {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 22px;
  z-index: 2;
}

.eq-bar {
  width: 5px;
  border-radius: 3px;
  background: #60a5fa;
  transition: height 0.24s ease, background 0.24s ease;
}

.deck-controls {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.deck-btn {
  padding: 9px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-line);
  background: var(--bg-elevated);
  color: var(--ink-secondary);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  transition: all 0.16s ease;
}

.deck-btn.active,
.deck-btn:hover {
  border-color: var(--anamorphic-blue);
  color: var(--ink-primary);
  background: var(--anamorphic-glow);
}

/* 章节通用样式 */
.section {
  padding: 76px 0;
  border-bottom: 1px solid var(--border-line);
}

.section-head {
  max-width: 680px;
  margin-bottom: 44px;
}

.section-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--anamorphic-blue);
  margin-bottom: 10px;
}

.section-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(26px, 3vw, 36px);
  letter-spacing: -0.02em;
}

.section-desc {
  margin: 0;
  color: var(--ink-secondary);
  font-size: 16px;
}

/* 功能矩阵卡片 */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--bg-deck);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 6px;
  background: var(--bg-elevated);
  color: var(--ink-secondary);
}

.card-tag.pro {
  background: var(--tungsten-soft);
  color: var(--tungsten-gold);
}

.feature-card h3 {
  margin: 4px 0 0;
  font-family: var(--font-display);
  font-size: 18px;
}

.feature-card p {
  margin: 0;
  font-size: 14px;
  color: var(--ink-secondary);
}

/* 登录试用流程横幅 */
.gate-banner {
  background: linear-gradient(135deg, var(--bg-deck), var(--bg-elevated));
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 36px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 32px;
  align-items: center;
}

.steps-list {
  display: grid;
  gap: 12px;
}

.step-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 10px;
  background: var(--bg-stage);
  border: 1px solid var(--border-line);
  font-size: 14px;
}

.step-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--tungsten-gold);
}

/* 定价网格 */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  align-items: stretch;
}

.plan-card {
  background: var(--bg-deck);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
}

.plan-card.featured {
  border-color: var(--anamorphic-blue);
  box-shadow: 0 18px 48px var(--anamorphic-glow);
}

.plan-name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 6px;
}

.plan-price {
  font-family: var(--font-display);
  font-size: 38px;
  font-weight: 700;
  margin: 10px 0 4px;
}

.plan-price small {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-secondary);
}

.plan-list {
  list-style: none;
  padding: 0;
  margin: 20px 0 26px;
  display: grid;
  gap: 10px;
  font-size: 14px;
  color: var(--ink-secondary);
  flex: 1;
}

.plan-list li::before {
  content: "✓ ";
  color: var(--emerald-ok);
  font-weight: 700;
}

/* 法律与合规文档排版 */
.legal-article {
  max-width: 800px;
  padding: 56px 0 84px;
}

.legal-article h1 {
  font-family: var(--font-display);
  font-size: 34px;
  margin: 0 0 10px;
}

.legal-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-muted);
  margin-bottom: 32px;
}

.legal-article h2 {
  font-family: var(--font-display);
  font-size: 20px;
  margin: 32px 0 10px;
}

.legal-article p,
.legal-article li {
  color: var(--ink-secondary);
  font-size: 15px;
}

.legal-callout {
  padding: 16px 20px;
  border-radius: var(--radius-md);
  border-left: 3px solid var(--anamorphic-blue);
  background: var(--bg-deck);
  margin: 22px 0;
}

/* 页脚 */
.site-footer {
  padding: 44px 0;
  font-size: 13px;
  color: var(--ink-muted);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-links a:hover {
  color: var(--ink-primary);
}

@media (max-width: 900px) {
  .hero-grid,
  .feature-grid,
  .pricing-grid,
  .gate-banner {
    grid-template-columns: 1fr;
  }
  .nav-links {
    display: none;
  }
}