/* ═══════════════════════════════════════════
   光尘阁品牌官网 · CSS
   配色：小光品牌系统
   深空蓝 #0A1628 · 暖黄 #F5A623 · 金色 #D4A830
   ═══════════════════════════════════════════ */

/* ── Reset & Base ─────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-deep: #0A1628;
  --bg-card: #0F1F3D;
  --bg-elevated: #152240;
  --yellow: #F5A623;
  --gold: #D4A830;
  --gold-light: #F0D068;
  --red: #B8452E;
  --text: #E8ECF1;
  --text-dim: #7B8FA5;
  --text-muted: #5B7FA5;
  --border: rgba(245, 166, 35, 0.12);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg-deep);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: rgba(245, 166, 35, 0.3); color: #fff; }

a { color: var(--yellow); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--gold-light); }

/* ── NAV ──────────────────────────────────── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(10, 22, 40, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.nav.scrolled { background: rgba(10, 22, 40, 0.95); }
.nav-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
  height: 60px;
}
.nav-logo {
  font-size: 1.25rem; font-weight: 700; color: var(--gold);
  letter-spacing: 0.05em;
}
.nav-logo:hover { color: var(--yellow); }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a {
  font-size: 0.875rem; color: var(--text-dim); font-weight: 500;
  transition: var(--transition);
}
.nav-links a:hover { color: var(--yellow); }
.nav-cta {
  background: var(--yellow); color: var(--bg-deep) !important;
  padding: 8px 20px; border-radius: 20px; font-weight: 600 !important;
  transition: var(--transition);
}
.nav-cta:hover { background: var(--gold-light) !important; transform: translateY(-1px); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: var(--transition); }

/* ── HERO ─────────────────────────────────── */
.hero {
  position: relative; min-height: 100vh; display: flex;
  align-items: center; justify-content: center; text-align: center;
  padding: 120px 24px 80px; overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 30%, rgba(245, 166, 35, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse 40% 50% at 80% 80%, rgba(212, 168, 48, 0.05) 0%, transparent 50%);
}
.hero-content { position: relative; z-index: 1; max-width: 720px; }
.hero-brand {
  font-size: 0.9rem; color: var(--gold); letter-spacing: 0.2em;
  text-transform: uppercase; margin-bottom: 20px;
}
.hero-title {
  font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 800;
  line-height: 1.25; letter-spacing: 0.02em;
  background: linear-gradient(135deg, var(--gold-light) 0%, var(--yellow) 50%, var(--gold) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 20px;
}
.hero-sub {
  font-size: clamp(1rem, 2.5vw, 1.2rem); color: var(--text-dim);
  line-height: 1.8; max-width: 540px; margin: 0 auto 16px;
}
.hero-positioning {
  font-size: 1rem; color: var(--gold); font-style: italic;
  letter-spacing: 0.08em; margin-bottom: 40px;
}
.hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 40px; }
.btn-primary {
  background: var(--yellow); color: var(--bg-deep);
  padding: 14px 36px; border-radius: 30px; font-weight: 700;
  font-size: 1rem; transition: var(--transition);
  box-shadow: 0 4px 20px rgba(245, 166, 35, 0.25);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 28px rgba(245, 166, 35, 0.4); color: var(--bg-deep); }
.btn-secondary {
  border: 1.5px solid var(--gold); color: var(--gold);
  padding: 14px 36px; border-radius: 30px; font-weight: 600;
  font-size: 1rem; transition: var(--transition);
}
.btn-secondary:hover { background: rgba(212, 168, 48, 0.1); transform: translateY(-2px); }
.hero-tagline { font-size: 0.9rem; color: var(--text-muted); font-style: italic; }
.hero-scroll {
  position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%);
  font-size: 1.2rem; color: var(--text-muted); animation: bounce 2s infinite;
}
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ── SECTIONS ─────────────────────────────── */
.section { padding: 100px 24px; }
.section:nth-child(even) { background: var(--bg-card); }
.section-inner { max-width: 1000px; margin: 0 auto; }

.section-head { text-align: center; margin-bottom: 60px; }
.section-num {
  display: inline-block; font-size: 0.75rem; font-weight: 700;
  color: var(--yellow); letter-spacing: 0.15em;
  border: 1px solid var(--border); padding: 4px 14px; border-radius: 20px;
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem); font-weight: 800;
  color: var(--text); margin-bottom: 12px; letter-spacing: 0.02em;
}
.section-sub {
  font-size: 1.05rem; color: var(--gold); margin-bottom: 8px;
}
.section-summary {
  font-size: 0.95rem; color: var(--text-dim); max-width: 560px; margin: 0 auto;
}
.section-detail {
  text-align: center; color: var(--text-dim); max-width: 680px;
  margin: 50px auto 0; font-size: 0.95rem; line-height: 1.8;
}

/* ── 筑产模型 ─────────────────────────────── */
.zhuchan-core {
  text-align: center; max-width: 720px; margin: 0 auto 50px;
}
.zhuchan-core h3 {
  font-size: 1.5rem; color: var(--yellow); margin-bottom: 16px;
}
.zhuchan-core-body {
  font-size: 1.05rem; line-height: 1.9; color: var(--text); margin-bottom: 16px;
}
.zhuchan-core-principle {
  font-size: 0.95rem; color: var(--gold); font-style: italic;
  border-left: 3px solid var(--yellow); padding-left: 16px;
  display: inline-block; text-align: left;
}

/* 六产 */
.zc-section { margin-bottom: 48px; }
.zc-subtitle {
  text-align: center; font-size: 1.1rem; color: var(--gold);
  margin-bottom: 28px; font-weight: 700;
}
.zc-six-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}
.zc-six-card {
  background: var(--bg-elevated); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px 20px;
  transition: var(--transition);
}
.zc-six-card:hover { border-color: rgba(245, 166, 35, 0.3); transform: translateY(-2px); }
.zc-six-card h4 { font-size: 1rem; color: var(--yellow); margin-bottom: 8px; }
.zc-six-card p { font-size: 0.87rem; color: var(--text-dim); line-height: 1.7; }

/* 四步 */
.zc-steps-vert {
  max-width: 680px; margin: 0 auto; display: flex; flex-direction: column; gap: 20px;
}
.zc-step-row {
  display: flex; gap: 20px; align-items: flex-start;
  background: var(--bg-elevated); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
  transition: var(--transition);
}
.zc-step-row:hover { border-color: rgba(245, 166, 35, 0.25); }
.zc-step-num {
  flex-shrink: 0; width: 42px; height: 42px; line-height: 42px;
  border-radius: 50%; background: rgba(245, 166, 35, 0.12);
  color: var(--yellow); font-weight: 800; font-size: 1rem;
  text-align: center; font-family: var(--font-mono);
}
.zc-step-body h4 { font-size: 1.05rem; color: var(--gold); margin-bottom: 6px; }
.zc-step-body p { font-size: 0.88rem; color: var(--text-dim); line-height: 1.75; }

/* ── 人生大逻辑 ────────────────────────────── */
.lg-section { margin-bottom: 44px; }
.lg-section:last-child { margin-bottom: 0; }
.lg-subtitle {
  text-align: center; font-size: 1.1rem; color: var(--gold);
  margin-bottom: 12px; font-weight: 700;
}
.lg-tagline {
  text-align: center; font-size: 0.92rem; color: var(--text-dim);
  font-style: italic; margin-bottom: 28px; line-height: 1.7;
}
.lg-direction-intro {
  text-align: center; font-size: 0.92rem; color: var(--text-dim);
  margin-bottom: 28px; max-width: 620px; margin-left: auto; margin-right: auto;
  line-height: 1.8;
}
.lg-direction-closing {
  text-align: center; margin-top: 28px;
  font-size: 0.95rem; color: var(--text); line-height: 1.8;
}

/* Foundation cards */
.lg-foundation-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.lg-foundation-card {
  background: var(--bg-elevated); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px 24px;
  transition: var(--transition);
}
.lg-foundation-card:hover { border-color: rgba(245, 166, 35, 0.25); }
.lg-foundation-card h4 {
  font-size: 1.05rem; color: var(--gold); margin-bottom: 10px;
}
.lg-foundation-card p { font-size: 0.88rem; color: var(--text-dim); line-height: 1.75; }

/* Direction cards */
.lg-direction-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.lg-direction-card {
  background: var(--bg-elevated); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px 20px;
  transition: var(--transition);
}
.lg-direction-card:hover { border-color: rgba(245, 166, 35, 0.2); }
.lg-direction-card h4 { font-size: 0.95rem; color: var(--yellow); margin-bottom: 8px; }
.lg-direction-card p { font-size: 0.85rem; color: var(--text-dim); line-height: 1.7; }

/* ── 见感思行 ──────────────────────────────── */
.jg-pipeline { max-width: 700px; margin: 0 auto; }
.jg-intro {
  text-align: center; font-size: 0.92rem; color: var(--text-dim);
  margin-bottom: 32px; line-height: 1.8;
}
.jg-steps-vert {
  display: flex; flex-direction: column; gap: 16px;
}
.jg-step {
  background: var(--bg-elevated); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px 24px;
  transition: var(--transition);
}
.jg-step:hover { border-color: rgba(245, 166, 35, 0.2); }
.jg-step-header {
  display: flex; align-items: center; gap: 14px; margin-bottom: 10px;
}
.jg-step-char {
  display: inline-block; width: 44px; height: 44px; line-height: 44px;
  border-radius: 50%; background: rgba(245, 166, 35, 0.15);
  color: var(--yellow); font-weight: 800; font-size: 1.2rem;
  text-align: center; flex-shrink: 0;
}
.jg-step-sub { font-size: 0.88rem; color: var(--gold); font-weight: 600; }
.jg-step-desc { font-size: 0.87rem; color: var(--text-dim); line-height: 1.75; padding-left: 58px; }
.jg-closing {
  text-align: center; margin-top: 32px;
  font-size: 0.92rem; color: var(--text-dim); line-height: 1.8;
}

/* ── 产品定价 ──────────────────────────────── */
.prod-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px; align-items: stretch; max-width: 880px; margin: 0 auto;
}
.prod-card {
  background: var(--bg-elevated); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 32px 24px;
  display: flex; flex-direction: column;
  transition: var(--transition);
}
.prod-card:hover { border-color: rgba(245, 166, 35, 0.25); transform: translateY(-4px); }
.prod-featured { border-color: rgba(245, 166, 35, 0.3); }
.prod-name { font-size: 1.15rem; color: var(--text); margin-bottom: 4px; }
.prod-sub { font-size: 0.82rem; color: var(--gold); margin-bottom: 16px; }
.prod-price {
  font-size: 1.5rem; font-weight: 800; color: var(--yellow);
  font-family: var(--font-mono); margin-bottom: 16px;
}
.prod-desc { font-size: 0.88rem; color: var(--text-dim); line-height: 1.7; margin-bottom: 20px; flex: 1; }
.prod-highlights { list-style: none; padding: 0; margin: 0; }
.prod-highlights li {
  font-size: 0.82rem; color: var(--text-muted); padding: 5px 0;
  border-bottom: 1px solid var(--border); line-height: 1.6;
}
.prod-highlights li:last-child { border-bottom: none; }
.prod-cta { margin-top: 36px !important; }

/* ── 认知觉醒 Timeline ──────────────────────── */
.path-timeline {
  display: flex; flex-direction: column; gap: 0; position: relative; padding-left: 40px;
}
.path-timeline::before {
  content: ''; position: absolute; left: 18px; top: 10px; bottom: 10px;
  width: 2px; background: linear-gradient(to bottom, var(--yellow), var(--gold), var(--gold-light));
}
.path-node {
  position: relative; padding: 24px 0; padding-left: 32px;
}
.path-marker {
  position: absolute; left: -26px; top: 30px;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--yellow); border: 3px solid var(--bg-card);
  box-shadow: 0 0 12px rgba(245, 166, 35, 0.3);
}
.path-node h4 {
  font-size: 1.15rem; color: var(--gold); margin-bottom: 6px;
}
.path-node p { font-size: 0.92rem; color: var(--text-dim); line-height: 1.7; }

/* ── 光尘阁AI ──────────────────────────────── */
.ai-thesis { text-align: center; margin-bottom: 48px; }
.ai-thesis-main {
  font-size: 1.2rem; font-weight: 600; color: var(--yellow);
  line-height: 1.8; max-width: 680px; margin: 0 auto 12px;
}
.ai-manifesto {
  font-size: 0.95rem; color: var(--gold); font-style: italic;
}

.shifts-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.shift-card {
  background: var(--bg-elevated); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px 24px;
  transition: var(--transition);
}
.shift-card:hover { border-color: rgba(245, 166, 35, 0.3); transform: translateY(-3px); }
.shift-domain {
  display: inline-block; font-size: 0.8rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.15em; color: var(--gold); margin-bottom: 14px;
  padding: 3px 10px; border: 1px solid rgba(212, 168, 48, 0.25);
  border-radius: 4px;
}
.shift-arrow {
  display: flex; align-items: center; gap: 10px; margin-bottom: 12px;
  flex-wrap: wrap;
}
.shift-from {
  font-size: 0.88rem; color: var(--text-dim);
  text-decoration: line-through; text-decoration-color: rgba(255,255,255,0.15);
}
.shift-arrow-icon { color: var(--yellow); font-weight: 700; font-size: 1.1rem; }
.shift-to {
  font-size: 0.95rem; color: var(--text); font-weight: 600;
}
.shift-desc { font-size: 0.88rem; color: var(--text-dim); line-height: 1.7; }

/* AI 企业版 */
.ai-enterprise {
  margin-top: 52px; padding-top: 44px;
  border-top: 1px solid var(--border);
}

/* Hero */
.ent-hero { text-align: center; margin-bottom: 48px; }
.ent-badge {
  display: inline-block; font-size: 0.75rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.15em;
  color: #0A1628; background: var(--yellow);
  padding: 4px 14px; border-radius: 4px; margin-bottom: 16px;
}
.ent-title { font-size: 1.5rem; color: var(--text); font-weight: 700; margin-bottom: 6px; }
.ent-sub { font-size: 0.92rem; color: var(--gold); margin-bottom: 16px; }
.ent-value-prop {
  font-size: 0.95rem; color: var(--text-dim); line-height: 1.8;
  max-width: 640px; margin: 0 auto;
}
.ent-stats {
  display: flex; justify-content: center; gap: 36px; margin-top: 28px;
  flex-wrap: wrap;
}
.ent-stat { text-align: center; }
.ent-stat-value {
  display: block; font-size: 1.6rem; font-weight: 800; color: var(--yellow);
  font-family: var(--font-mono);
}
.ent-stat-label { font-size: 0.8rem; color: var(--text-dim); }

/* Sections */
.ent-section { margin-bottom: 44px; }
.ent-section-title {
  text-align: center; font-size: 1.05rem; color: var(--gold);
  margin-bottom: 24px; font-weight: 700;
}

/* Pain Points */
.ent-pain-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}
.ent-pain-card {
  background: rgba(220, 50, 50, 0.06); border: 1px solid rgba(220, 50, 50, 0.12);
  border-radius: var(--radius); padding: 20px 20px;
}
.ent-pain-card h5 { font-size: 0.92rem; color: #e07070; margin-bottom: 6px; }
.ent-pain-card p { font-size: 0.85rem; color: var(--text-dim); line-height: 1.65; }
.ent-solution {
  text-align: center; margin-top: 20px;
  font-size: 0.92rem; color: var(--text); line-height: 1.8;
}

/* Evolution */
.ent-evo-track {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}
.ent-evo-node {
  background: var(--bg-elevated); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px 20px;
  text-align: center; transition: var(--transition);
}
.ent-evo-node:hover { border-color: rgba(245, 166, 35, 0.2); }
.evo-dot {
  display: inline-block; font-size: 0.75rem; font-weight: 700;
  color: #0A1628; background: var(--yellow);
  padding: 3px 12px; border-radius: 12px; margin-bottom: 12px;
}
.ent-evo-node h5 { font-size: 1rem; color: var(--text); margin-bottom: 8px; }
.ent-evo-node p { font-size: 0.85rem; color: var(--text-dim); line-height: 1.7; }

/* Capabilities */
.ent-cap-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}
.ent-cap-card {
  background: var(--bg-elevated); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
  transition: var(--transition);
}
.ent-cap-card:hover { border-color: rgba(245, 166, 35, 0.2); }
.ent-cap-card h5 { font-size: 1rem; color: var(--gold); margin-bottom: 8px; }
.ent-cap-card p { font-size: 0.87rem; color: var(--text-dim); line-height: 1.7; }

/* Cases */
.ent-case-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}
.ent-case-card {
  background: var(--bg-elevated); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 22px 20px;
  transition: var(--transition);
}
.ent-case-card:hover { border-color: rgba(245, 166, 35, 0.15); }
.case-scene {
  display: block; font-size: 0.85rem; font-weight: 700; color: var(--yellow);
  margin-bottom: 8px;
}
.case-result { font-size: 0.87rem; color: var(--text-dim); line-height: 1.65; }

/* 4-Week Path */
.ent-path-track {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}
.ent-path-node {
  background: var(--bg-elevated); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 22px 18px; text-align: center;
  transition: var(--transition);
}
.ent-path-node:hover { border-color: rgba(245, 166, 35, 0.2); }
.path-week {
  display: block; font-size: 0.8rem; color: var(--text-dim); margin-bottom: 4px;
}
.path-phase {
  display: block; font-size: 1rem; font-weight: 700; color: var(--yellow);
  margin-bottom: 8px;
}
.path-desc { font-size: 0.83rem; color: var(--text-dim); line-height: 1.6; }

.ent-closing {
  text-align: center; font-size: 0.95rem; color: var(--text-dim);
  font-style: italic; line-height: 1.8;
}

/* ── 会员 ──────────────────────────────────── */
.tiers-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px; align-items: stretch;
}
.tier-card {
  background: var(--bg-elevated); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 36px 28px; text-align: center;
  transition: var(--transition);
}
.tier-card:hover { transform: translateY(-4px); }
.tier-featured {
  border-color: var(--yellow);
  box-shadow: 0 0 30px rgba(245, 166, 35, 0.1);
}
.tier-card h4 { font-size: 1.15rem; color: var(--text); margin-bottom: 12px; }
.tier-price {
  font-size: 1.4rem; font-weight: 800; color: var(--yellow); margin-bottom: 14px;
}
.tier-card p { font-size: 0.9rem; color: var(--text-dim); line-height: 1.7; }

/* ── GEO ──────────────────────────────────── */
.geo-headline { text-align: center; margin-bottom: 40px; }
.geo-thesis {
  font-size: 1.25rem; font-weight: 700; color: var(--yellow);
  line-height: 1.7; max-width: 600px; margin: 0 auto 16px;
}
.geo-pitch {
  font-size: 0.95rem; color: var(--text-dim); line-height: 1.9;
  max-width: 640px; margin: 0 auto;
}

.geo-tiers {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px; margin-bottom: 56px;
}
.geo-tier-card {
  background: var(--bg-elevated); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px 24px; text-align: center;
  transition: var(--transition);
}
.geo-tier-card:hover { border-color: rgba(245, 166, 35, 0.25); transform: translateY(-3px); }
.geo-tier-segment {
  display: block; font-size: 0.95rem; font-weight: 700; color: var(--text);
  margin-bottom: 10px;
}
.geo-tier-why {
  font-size: 0.88rem; color: var(--text-dim); line-height: 1.7;
}

/* GEO 六阶段框架 */
.geo-framework { margin-bottom: 44px; }
.geo-framework-title {
  text-align: center; font-size: 1.15rem; color: var(--gold);
  margin-bottom: 12px; font-weight: 700;
}
.geo-framework-intro {
  text-align: center; font-size: 0.92rem; color: var(--text-dim);
  line-height: 1.8; max-width: 680px; margin: 0 auto 36px;
}
.geo-stages {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}
.geo-stage-card {
  background: var(--bg-elevated); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 26px 24px;
  transition: var(--transition);
}
.geo-stage-card:hover { border-color: rgba(245, 166, 35, 0.2); transform: translateY(-2px); }
.geo-stage-head {
  display: flex; align-items: center; gap: 10px; margin-bottom: 12px;
}
.geo-stage-num {
  font-size: 1.3rem; font-weight: 800; color: var(--yellow);
  font-family: var(--font-mono);
}
.geo-stage-tag {
  font-size: 0.75rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.1em; color: var(--gold);
  padding: 2px 8px; border: 1px solid rgba(212, 168, 48, 0.2);
  border-radius: 3px;
}
.geo-stage-title {
  font-size: 1rem; color: var(--text); font-weight: 600; margin-bottom: 8px;
}
.geo-stage-desc {
  font-size: 0.87rem; color: var(--text-dim); line-height: 1.75;
}

/* ── 关于谈光尘 ──────────────────────────── */
.about-name-meaning {
  text-align: center; max-width: 640px; margin: 0 auto 30px;
}
.about-name-meaning p {
  font-size: 1.15rem; color: var(--gold-light); line-height: 1.8;
}
.about-identity {
  text-align: center; margin-bottom: 30px;
}
.about-identity p {
  font-size: 0.95rem; color: var(--text-dim);
  padding: 10px 24px; display: inline-block;
  border: 1px solid var(--border); border-radius: 24px;
}
.about-roles {
  display: flex; flex-wrap: wrap; gap: 12px; justify-content: center;
  margin-bottom: 32px;
}
.about-role-item {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 18px; border-radius: 20px;
  background: var(--bg-elevated); border: 1px solid var(--border);
}
.role-org { font-size: 0.85rem; color: var(--text-dim); }
.role-title { font-size: 0.8rem; color: var(--yellow); font-weight: 600; }
.about-story {
  text-align: center; max-width: 680px; margin: 0 auto;
}
.about-story p {
  font-size: 0.95rem; color: var(--text-dim); line-height: 1.9;
}

/* ── MOTTO ──────────────────────────────────── */
.motto {
  padding: 100px 24px; text-align: center;
  background: var(--bg-deep);
  border-top: 1px solid rgba(212, 168, 48, 0.1);
  border-bottom: 1px solid rgba(212, 168, 48, 0.1);
}
.motto-inner { max-width: 600px; margin: 0 auto; }
.motto-text {
  font-size: clamp(1.8rem, 4.5vw, 2.8rem); font-weight: 800;
  letter-spacing: 0.06em;
  background: linear-gradient(135deg, var(--gold-light) 0%, var(--yellow) 60%, var(--gold) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 20px; line-height: 1.4;
}
.motto-sub {
  font-size: 0.95rem; color: var(--text-dim);
  line-height: 1.8; max-width: 480px; margin: 0 auto;
}

/* ── CTA / Footer ──────────────────────────── */
.cta {
  background: var(--bg-elevated); padding: 80px 24px;
  text-align: center; border-top: 1px solid var(--border);
}
.cta-inner { max-width: 600px; margin: 0 auto; }
.cta h2 {
  font-size: clamp(1.4rem, 3vw, 1.8rem); font-weight: 800;
  color: var(--gold-light); margin-bottom: 16px;
}
.cta p { font-size: 1rem; color: var(--text-dim); margin-bottom: 32px; }
.cta-contact {
  display: flex; gap: 24px; justify-content: center; flex-wrap: wrap;
  margin-bottom: 32px;
}
.cta-contact span {
  font-size: 0.9rem; color: var(--text-muted);
  padding: 8px 20px; border: 1px solid var(--border); border-radius: 20px;
}
.cta-links { display: flex; gap: 20px; justify-content: center; margin-bottom: 40px; }
.cta-links a { font-size: 0.9rem; }
.cta-copy { font-size: 0.8rem; color: var(--text-muted); }
.cta-icp { font-size: 0.75rem; margin-top: 2px; }
.cta-icp a { color: var(--text-muted); text-decoration: none; opacity: 0.7; }
.cta-icp a:hover { opacity: 1; }

/* ── RESPONSIVE ────────────────────────────── */
@media (max-width: 768px) {
  .section { padding: 70px 20px; }
  .nav-links { display: none; }
  .nav-links.open {
    display: flex; flex-direction: column; position: absolute;
    top: 60px; left: 0; right: 0; background: rgba(10, 22, 40, 0.98);
    padding: 20px 24px; gap: 16px; border-bottom: 1px solid var(--border);
    backdrop-filter: blur(20px);
  }
  .nav-toggle { display: flex; }
  .hero { padding: 100px 20px 60px; }
  .zc-six-grid { grid-template-columns: repeat(2, 1fr); }
  .zc-step-row { flex-direction: column; align-items: center; text-align: center; }
  .zc-step-body { text-align: center; }
  .lg-foundation-grid, .lg-direction-grid { grid-template-columns: 1fr; }
  .jg-step-desc { padding-left: 0; }
  .prod-grid { grid-template-columns: 1fr; }
  .path-timeline { padding-left: 28px; }
  .path-timeline::before { left: 12px; }
  .path-marker { left: -20px; }
}

@media (max-width: 480px) {
  .hero-cta { flex-direction: column; align-items: center; }
  .zc-six-grid { grid-template-columns: 1fr; }
  .pillars, .logic-grid, .features-grid, .shifts-grid, .geo-tiers, .geo-stages, .ai-enterprise-grid, .ent-pain-grid, .ent-evo-track, .ent-cap-grid, .ent-case-grid, .ent-path-track,
  .lg-foundation-grid, .lg-direction-grid, .prod-grid { grid-template-columns: 1fr; }
  .tiers-grid { grid-template-columns: 1fr; }
}