@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,600;1,300;1,400&family=JetBrains+Mono:wght@400;500;700&family=Outfit:wght@300;400;500;600&family=Noto+Sans+SC:wght@300;400;500;700&display=swap');

:root {
  --bg-primary:#f5f3ef;--bg-secondary:#eae7e1;--bg-card:#ffffff;--bg-card-hover:#faf9f7;
  --bg-nav:rgba(245,243,239,0.92);--text-primary:#1a1510;--text-secondary:#4a4035;
  --text-muted:#8a7d6e;--text-inverse:#f5f3ef;
  --accent:#b8860b;--accent-bright:#d4a017;--accent-dim:rgba(184,134,11,0.12);
  --accent-glow:0 0 20px rgba(184,134,11,0.25);
  --border:rgba(184,134,11,0.2);--border-strong:rgba(184,134,11,0.5);
  --border-subtle:rgba(26,21,16,0.08);--nav-height:72px;
  --font-display:'Cormorant Garamond',serif;--font-body:'Outfit',sans-serif;
  --font-mono:'JetBrains Mono',monospace;--font-cn:'Noto Sans SC',sans-serif;
  --radius-sm:4px;--radius-md:8px;--radius-lg:16px;
  --shadow-sm:0 1px 4px rgba(0,0,0,0.06);--shadow-md:0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg:0 12px 48px rgba(0,0,0,0.12);--shadow-accent:0 4px 24px rgba(184,134,11,0.2);
  --transition:0.25s ease;
}
[data-theme="dark"] {
  --bg-primary:#080c18;--bg-secondary:#0d1225;--bg-card:#111827;--bg-card-hover:#141e30;
  --bg-nav:rgba(8,12,24,0.92);--text-primary:#e8eaf0;--text-secondary:#a8b0c4;
  --text-muted:#5a6480;--text-inverse:#080c18;
  --accent:#00d4ff;--accent-bright:#33deff;--accent-dim:rgba(0,212,255,0.1);
  --accent-glow:0 0 30px rgba(0,212,255,0.3);
  --border:rgba(0,212,255,0.15);--border-strong:rgba(0,212,255,0.4);
  --border-subtle:rgba(255,255,255,0.05);
  --shadow-sm:0 1px 4px rgba(0,0,0,0.4);--shadow-md:0 4px 20px rgba(0,0,0,0.5);
  --shadow-lg:0 12px 48px rgba(0,0,0,0.6);--shadow-accent:0 4px 24px rgba(0,212,255,0.2);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-body);background:var(--bg-primary);color:var(--text-primary);line-height:1.6;transition:background var(--transition),color var(--transition);-webkit-font-smoothing:antialiased}
h1,h2,h3,h4,h5,h6{font-family:var(--font-display);font-weight:400;line-height:1.2}
a{color:var(--accent);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--accent-bright)}

/* Language */
.en-i{display:inline!important}.cn-i{display:none!important}
.en{display:block!important}.cn{display:none!important}
[data-lang="cn"] .en-i{display:none!important}[data-lang="cn"] .cn-i{display:inline!important}
[data-lang="cn"] .en{display:none!important}[data-lang="cn"] .cn{display:block!important}

/* Nav */
.nav{position:fixed;top:0;left:0;right:0;z-index:1000;height:var(--nav-height);background:var(--bg-nav);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border);display:flex;align-items:center;transition:background var(--transition),border-color var(--transition)}
.nav-inner{max-width:1280px;margin:0 auto;padding:0 32px;width:100%;display:flex;align-items:center;gap:24px}
.nav-logo{display:flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0}
.logo-mark{width:38px;height:38px;border:1.5px solid var(--accent);display:flex;align-items:center;justify-content:center;font-family:var(--font-mono);font-size:13px;font-weight:700;color:var(--accent);position:relative;transition:all var(--transition);flex-shrink:0}
.logo-mark::before{content:'';position:absolute;inset:4px;border:1px solid var(--accent);opacity:0.35}
.nav-logo:hover .logo-mark{box-shadow:var(--accent-glow)}
.logo-text{display:flex;flex-direction:column;gap:1px}
.logo-name{font-family:var(--font-mono);font-size:13px;font-weight:700;letter-spacing:0.12em;color:var(--text-primary);text-transform:uppercase;transition:color var(--transition)}
.logo-tagline{font-family:var(--font-body);font-size:9px;font-weight:300;letter-spacing:0.16em;color:var(--accent);text-transform:uppercase;transition:color var(--transition)}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:auto;list-style:none}
.nav-links a{font-family:var(--font-body);font-size:13px;font-weight:500;letter-spacing:0.04em;color:var(--text-secondary);padding:6px 12px;border-radius:var(--radius-sm);transition:color var(--transition),background var(--transition)}
.nav-links a:hover,.nav-links a.active{color:var(--accent)}
.nav-links a.active{background:var(--accent-dim)}
.nav-controls{display:flex;align-items:center;gap:10px;flex-shrink:0}

/* Lang dropdown */
.lang-dropdown{position:relative}
.lang-btn{display:flex;align-items:center;gap:6px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:6px 10px;font-family:var(--font-mono);font-size:11px;font-weight:600;letter-spacing:0.08em;color:var(--text-secondary);cursor:pointer;transition:all var(--transition);white-space:nowrap}
.lang-btn:hover{border-color:var(--accent);color:var(--accent)}
.lang-btn svg{width:13px;height:13px;transition:transform var(--transition)}
.lang-dropdown.open .lang-btn svg:last-child{transform:rotate(180deg)}
.lang-menu{position:absolute;top:calc(100% + 6px);right:0;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden;min-width:170px;box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transform:translateY(-6px);transition:all var(--transition);z-index:200}
.lang-dropdown.open .lang-menu{opacity:1;visibility:visible;transform:translateY(0)}
.lang-option{display:flex;align-items:center;gap:10px;padding:10px 14px;font-size:13px;color:var(--text-secondary);cursor:pointer;transition:background var(--transition),color var(--transition)}
.lang-option:hover{background:var(--accent-dim);color:var(--accent)}
.lang-option.active{color:var(--accent);background:var(--accent-dim)}
.lang-option .flag{font-size:16px}
.lang-option .lang-label{font-family:var(--font-body);font-weight:500;flex:1}
.lang-option .lang-native{font-size:10px;color:var(--text-muted);font-family:var(--font-mono);letter-spacing:0.08em}

/* Theme toggle */
.theme-toggle{width:42px;height:24px;background:var(--bg-secondary);border:1px solid var(--border);border-radius:12px;position:relative;cursor:pointer;transition:background var(--transition),border-color var(--transition);flex-shrink:0;outline:none}
.theme-toggle::after{content:'';position:absolute;width:18px;height:18px;background:var(--accent);border-radius:50%;top:2px;left:2px;transition:transform var(--transition),background var(--transition);box-shadow:0 0 8px var(--accent)}
[data-theme="dark"] .theme-toggle::after{transform:translateX(18px)}
.theme-icons{position:absolute;inset:0;display:flex;align-items:center;justify-content:space-between;padding:0 4px;pointer-events:none;font-size:9px}

/* CTA btn */
.btn-cta{display:inline-flex;align-items:center;gap:6px;padding:8px 18px;background:var(--accent);color:var(--text-inverse);border-radius:var(--radius-sm);font-family:var(--font-body);font-size:13px;font-weight:600;letter-spacing:0.04em;border:none;cursor:pointer;transition:all var(--transition);text-decoration:none;white-space:nowrap}
.btn-cta:hover{background:var(--accent-bright);color:var(--text-inverse);box-shadow:var(--shadow-accent);transform:translateY(-1px)}

/* Page */
.page-wrap{padding-top:var(--nav-height);min-height:100vh}
.section{padding:96px 0}.section-sm{padding:64px 0}
.container{max-width:1280px;margin:0 auto;padding:0 32px}
.container-narrow{max-width:860px;margin:0 auto;padding:0 32px}

/* Eyebrow */
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:10px;font-weight:700;letter-spacing:0.2em;color:var(--accent);text-transform:uppercase;margin-bottom:16px}
.eyebrow::before{content:'';display:block;width:24px;height:1px;background:var(--accent)}

/* Cards */
.card{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:28px;transition:all var(--transition);box-shadow:var(--shadow-sm)}
.card:hover{border-color:var(--border);box-shadow:var(--shadow-md);transform:translateY(-2px)}

/* Buttons */
.btn-primary{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;background:var(--accent);color:var(--text-inverse);border:none;border-radius:var(--radius-sm);font-family:var(--font-body);font-size:14px;font-weight:600;letter-spacing:0.04em;cursor:pointer;transition:all var(--transition);text-decoration:none}
.btn-primary:hover{background:var(--accent-bright);color:var(--text-inverse);box-shadow:var(--shadow-accent);transform:translateY(-2px)}
.btn-secondary{display:inline-flex;align-items:center;gap:8px;padding:13px 24px;background:transparent;color:var(--text-secondary);border:1px solid var(--border);border-radius:var(--radius-sm);font-family:var(--font-body);font-size:14px;font-weight:500;cursor:pointer;transition:all var(--transition);text-decoration:none}
.btn-secondary:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-dim)}

/* Footer */
.footer{background:var(--bg-secondary);border-top:1px solid var(--border);padding:64px 0 32px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;padding-bottom:48px;border-bottom:1px solid var(--border-subtle);margin-bottom:32px}
.footer-tagline{font-size:13px;color:var(--text-muted);margin-top:12px;line-height:1.7;max-width:260px}
.footer-heading{font-family:var(--font-mono);font-size:10px;font-weight:700;letter-spacing:0.18em;color:var(--accent);text-transform:uppercase;margin-bottom:16px}
.footer-links{list-style:none;display:flex;flex-direction:column;gap:8px}
.footer-links a{font-size:13px;color:var(--text-muted);transition:color var(--transition)}
.footer-links a:hover{color:var(--accent)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--text-muted)}

/* CTA strip */
.cta-strip{background:var(--bg-card);border-top:1px solid var(--border);border-bottom:1px solid var(--border);padding:64px 0;text-align:center}
.cta-strip h2{font-size:clamp(28px,4vw,42px);margin-bottom:12px}
.cta-strip p{color:var(--text-muted);font-size:16px;margin-bottom:28px}

/* Accent shimmer */
@keyframes shimmer{0%{background-position:-200% center}100%{background-position:200% center}}
.accent-line{display:inline-block;background:linear-gradient(90deg,var(--accent),var(--accent-bright),var(--accent));background-size:200% auto;-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;animation:shimmer 4s linear infinite}

/* Dark bg glow */
[data-theme="dark"] body::before{content:'';position:fixed;inset:0;z-index:-1;background-image:radial-gradient(ellipse 80% 60% at 20% -10%,rgba(0,212,255,0.05) 0%,transparent 60%),radial-gradient(ellipse 60% 40% at 80% 110%,rgba(0,212,255,0.04) 0%,transparent 60%);pointer-events:none}

::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:var(--border-strong);border-radius:3px}

/* Utilities */
.text-accent{color:var(--accent)}.text-muted{color:var(--text-muted)}.text-center{text-align:center}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.mt-8{margin-top:8px}.mt-16{margin-top:16px}.mt-24{margin-top:24px}.mt-32{margin-top:32px}.mt-48{margin-top:48px}
.mb-8{margin-bottom:8px}.mb-16{margin-bottom:16px}.mb-24{margin-bottom:24px}.mb-32{margin-bottom:32px}.mb-48{margin-bottom:48px}

@media(max-width:1024px){.grid-4{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1fr 1fr;gap:32px}}
@media(max-width:768px){.nav-inner{padding:0 20px;gap:12px}.nav-links{display:none}.container{padding:0 20px}.section{padding:64px 0}.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.footer-bottom{flex-direction:column;gap:8px;text-align:center}}