/* ===================================================
   WPS Office 2026 — Template 02: Pure White Tech
   极简白色科技风 · Clean · Minimal · Professional
   =================================================== */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }

:root {
  --primary:       #1A56DB;
  --primary-light: #EBF5FF;
  --primary-dark:  #1245B8;
  --accent:        #0EA5E9;
  --accent2:       #6366F1;
  --success:       #10B981;
  --warning:       #F59E0B;
  --bg:            #FFFFFF;
  --bg-soft:       #F8FAFC;
  --bg-muted:      #F1F5F9;
  --surface:       #FFFFFF;
  --border:        #E2E8F0;
  --border-dark:   #CBD5E1;
  --text-h:        #0F172A;
  --text-body:     #334155;
  --text-muted:    #64748B;
  --text-light:    #94A3B8;
  --grad-primary:  linear-gradient(135deg, #1A56DB 0%, #0EA5E9 100%);
  --grad-soft:     linear-gradient(135deg, #EBF5FF 0%, #E0F2FE 100%);
  --shadow-xs:     0 1px 3px rgba(0,0,0,0.06);
  --shadow-sm:     0 2px 8px rgba(0,0,0,0.08);
  --shadow-md:     0 8px 24px rgba(0,0,0,0.10);
  --shadow-lg:     0 20px 60px rgba(0,0,0,0.12);
  --shadow-blue:   0 8px 32px rgba(26,86,219,0.18);
  --radius-sm:     6px;
  --radius-md:     10px;
  --radius-lg:     16px;
  --radius-xl:     24px;
  --radius-full:   9999px;
  --transition:    all 0.22s cubic-bezier(0.4,0,0.2,1);
  --font:          'Inter','Noto Sans SC',-apple-system,BlinkMacSystemFont,sans-serif;
}

body { font-family: var(--font); background: var(--bg); color: var(--text-body); line-height: 1.65; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
h1,h2,h3,h4,h5 { color: var(--text-h); font-weight: 700; line-height: 1.25; }
a { color: inherit; text-decoration: none; }
p { color: var(--text-body); }
::-webkit-scrollbar { width: 5px; } ::-webkit-scrollbar-track { background: var(--bg-muted); } ::-webkit-scrollbar-thumb { background: var(--border-dark); border-radius: 3px; }
::selection { background: rgba(26,86,219,0.12); color: var(--text-h); }

.container { max-width: 1180px; margin: 0 auto; padding: 0 2rem; }

/* NAVBAR */
.navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(255,255,255,0.92); backdrop-filter: blur(20px); border-bottom: 1px solid var(--border); }
.nav-inner { display: flex; align-items: center; height: 64px; gap: 2rem; }
.nav-logo { display: flex; align-items: center; gap: 0.5rem; flex-shrink: 0; }
.logo-icon { width: 32px; height: 32px; background: var(--grad-primary); border-radius: 8px; display: flex; align-items: center; justify-content: center; }
.logo-icon svg { width: 18px; height: 18px; }
.logo-text { font-size: 1rem; font-weight: 800; color: var(--text-h); letter-spacing: -0.02em; }
.nav-links { display: flex; align-items: center; gap: 0.25rem; flex: 1; }
.nav-link { padding: 0.4rem 0.85rem; color: var(--text-muted); font-size: 0.88rem; font-weight: 500; border-radius: var(--radius-full); transition: var(--transition); }
.nav-link:hover, .nav-link.active { color: var(--primary); background: var(--primary-light); }
.nav-actions { display: flex; align-items: center; gap: 0.5rem; flex-shrink: 0; }
.btn-nav-ghost { padding: 0.42rem 1.1rem; border: 1px solid var(--border-dark); border-radius: var(--radius-full); font-size: 0.88rem; font-weight: 500; color: var(--text-muted); transition: var(--transition); }
.btn-nav-ghost:hover { color: var(--text-h); border-color: var(--primary); }
.btn-nav-primary { padding: 0.45rem 1.2rem; background: var(--primary); color: #fff; border-radius: var(--radius-full); font-size: 0.88rem; font-weight: 700; transition: var(--transition); box-shadow: var(--shadow-blue); }
.btn-nav-primary:hover { background: var(--primary-dark); box-shadow: 0 12px 36px rgba(26,86,219,0.28); transform: translateY(-1px); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 5px; padding: 4px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--text-muted); border-radius: 2px; transition: var(--transition); }

/* GRADIENT TEXT */
.gradient-text { background: var(--grad-primary); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

/* SECTION HEADER */
.section-header { text-align: center; margin-bottom: 3.5rem; }
.section-eyebrow { display: inline-flex; align-items: center; gap: 0.4rem; padding: 0.3rem 0.9rem; background: var(--primary-light); border-radius: var(--radius-full); color: var(--primary); font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 1rem; }
.section-title { font-size: clamp(1.8rem, 3.5vw, 2.8rem); font-weight: 900; letter-spacing: -0.03em; color: var(--text-h); margin-bottom: 0.75rem; }
.section-desc { font-size: 1rem; color: var(--text-muted); max-width: 560px; margin: 0 auto; line-height: 1.8; }

/* BUTTONS */
.btn-primary { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.85rem 2rem; background: var(--primary); color: #fff; border-radius: var(--radius-full); font-size: 1rem; font-weight: 700; transition: var(--transition); box-shadow: var(--shadow-blue); border: none; cursor: pointer; }
.btn-primary:hover { background: var(--primary-dark); box-shadow: 0 12px 40px rgba(26,86,219,0.32); transform: translateY(-2px); }
.btn-secondary { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.85rem 2rem; background: var(--bg-muted); color: var(--text-h); border-radius: var(--radius-full); font-size: 1rem; font-weight: 700; transition: var(--transition); border: 1px solid var(--border); cursor: pointer; }
.btn-secondary:hover { background: var(--bg-soft); border-color: var(--border-dark); transform: translateY(-2px); }
.btn-outline { display: inline-flex; align-items: center; gap: 0.4rem; padding: 0.65rem 1.5rem; border: 1.5px solid var(--primary); color: var(--primary); border-radius: var(--radius-full); font-size: 0.9rem; font-weight: 600; transition: var(--transition); cursor: pointer; }
.btn-outline:hover { background: var(--primary-light); }

/* CARD */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 2rem; transition: var(--transition); }
.card:hover { box-shadow: var(--shadow-md); border-color: var(--border-dark); transform: translateY(-3px); }

/* BADGE */
.badge { display: inline-flex; align-items: center; gap: 0.3rem; padding: 0.2rem 0.7rem; border-radius: var(--radius-full); font-size: 0.75rem; font-weight: 700; }
.badge-blue { background: var(--primary-light); color: var(--primary); }
.badge-green { background: #ECFDF5; color: var(--success); }
.badge-orange { background: #FFFBEB; color: var(--warning); }

/* DIVIDER */
.divider { height: 1px; background: var(--border); margin: 0; }

/* FOOTER */
.footer { background: var(--bg-soft); border-top: 1px solid var(--border); padding: 4rem 0 1.5rem; }
.footer-top { display: grid; grid-template-columns: 260px 1fr; gap: 4rem; margin-bottom: 2.5rem; padding-bottom: 2.5rem; border-bottom: 1px solid var(--border); }
.footer-brand p { font-size: 0.88rem; color: var(--text-muted); margin-top: 0.75rem; line-height: 1.7; }
.footer-social { display: flex; gap: 0.5rem; margin-top: 1.25rem; }
.social-link { padding: 0.35rem 0.85rem; background: var(--bg-muted); border: 1px solid var(--border); border-radius: var(--radius-full); font-size: 0.78rem; color: var(--text-muted); transition: var(--transition); }
.social-link:hover { color: var(--primary); border-color: var(--primary); background: var(--primary-light); }
.footer-links { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; }
.footer-col h4 { font-size: 0.82rem; font-weight: 700; color: var(--text-h); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 1rem; }
.footer-col a { display: block; font-size: 0.88rem; color: var(--text-muted); margin-bottom: 0.5rem; transition: var(--transition); }
.footer-col a:hover { color: var(--primary); transform: translateX(3px); }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; font-size: 0.82rem; color: var(--text-light); }
.footer-legal { display: flex; gap: 1.5rem; }
.footer-legal a { color: var(--text-light); transition: var(--transition); }
.footer-legal a:hover { color: var(--text-muted); }

/* RESPONSIVE */
@media (max-width: 1024px) { .nav-links { display: none; } .nav-toggle { display: flex; } .footer-top { grid-template-columns: 1fr; gap: 2rem; } .footer-links { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 768px) { .container { padding: 0 1.25rem; } .footer-bottom { flex-direction: column; gap: 0.75rem; text-align: center; } }
.nav-links.nav-open { display: flex; position: fixed; top: 64px; left: 0; right: 0; flex-direction: column; background: rgba(255,255,255,0.98); backdrop-filter: blur(20px); padding: 1rem; border-bottom: 1px solid var(--border); gap: 0.25rem; z-index: 999; }
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }