/* ═══════════════════════════════════════════════════
   GEO AI 优化官网 - Global Styles
   科技感深色主题：黑蓝色系 + 青绿强调
   ═══════════════════════════════════════════════════ */

:root {
  --geo-cyan: #00d4ff;
  --geo-green: #00ff88;
  --geo-blue: #0099ff;
  --geo-purple: #7c5cfc;
  --geo-orange: #ff6b35;
  --geo-dark: #0b2545;
  --geo-dark-2: #102e55;
  --geo-dark-3: #173a66;
  --geo-glow-cyan: 0 0 20px rgba(0, 212, 255, 0.3);
  --geo-glow-green: 0 0 20px rgba(0, 255, 136, 0.3);
  --geo-glow-blue: 0 0 20px rgba(0, 153, 255, 0.3);
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", Arial, sans-serif;
  --font-display: "Segoe UI", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--geo-dark);
  background-image: radial-gradient(ellipse at 10% 30%, rgba(0, 120, 255, 0.28) 0%, transparent 55%), radial-gradient(ellipse at 90% 10%, rgba(0, 212, 255, 0.20) 0%, transparent 50%), radial-gradient(ellipse at 50% 90%, rgba(0, 200, 120, 0.12) 0%, transparent 45%), radial-gradient(ellipse at 70% 50%, rgba(30, 100, 255, 0.10) 0%, transparent 40%);
  color: rgba(255,255,255,0.92);
  line-height: 1.6;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ── Container ── */
.container { width: 100%; max-width: 1400px; margin: 0 auto; padding: 0 1rem; }
@media (min-width: 640px) { .container { padding: 0 1.5rem; } }
@media (min-width: 1024px) { .container { padding: 0 2rem; } }

/* ── Utilities ── */
.text-white { color: #fff; }
.text-gradient-geo {
  background: linear-gradient(135deg, var(--geo-cyan), var(--geo-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Particle Canvas ── */
.particle-canvas { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none; }

/* ── Navbar ── */
.navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; transition: all 0.5s ease; }
.navbar.scrolled { background: rgba(18, 28, 48, 0.96); backdrop-filter: blur(20px); border-bottom: 1px solid rgba(0, 212, 255, 0.1); }
.nav-container { display: flex; align-items: center; justify-content: space-between; height: 84px; }
.nav-brand { display: flex; align-items: center; gap: 12px; }
.brand-icon { position: relative; width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; }
.brand-icon-bg { position: absolute; inset: 0; border-radius: 8px; background: linear-gradient(135deg, var(--geo-cyan), var(--geo-green)); opacity: 0.2; }
.brand-letter { font-family: var(--font-display); font-size: 1.125rem; font-weight: 700; background: linear-gradient(135deg, var(--geo-cyan), var(--geo-green)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; position: relative; z-index: 1; }
.brand-text { display: flex; flex-direction: column; }
.brand-name { font-family: var(--font-display); font-size: 1rem; font-weight: 700; letter-spacing: 0.1em; color: #fff; }
.brand-sub { font-size: 0.55rem; color: rgba(0, 212, 255, 0.6); letter-spacing: 0.15em; margin-top: -2px; }
.nav-links { display: flex; align-items: center; gap: 2px; }
.nav-link { padding: 8px 14px; font-size: 0.8rem; font-weight: 500; color: rgba(255,255,255,0.7); transition: color 0.3s; position: relative; }
.nav-link:hover, .nav-link.active { color: var(--geo-cyan); }
.nav-link.active::after { content: ''; position: absolute; bottom: 0; left: 8px; right: 8px; height: 2px; background: linear-gradient(to right, var(--geo-cyan), var(--geo-green)); border-radius: 1px; }
.nav-cta { margin-left: 12px; padding: 8px 18px; background: linear-gradient(135deg, var(--geo-cyan), var(--geo-blue)); color: var(--geo-dark); font-size: 0.8rem; font-weight: 600; border-radius: 6px; transition: all 0.3s; }
.nav-cta:hover { box-shadow: var(--geo-glow-cyan); transform: translateY(-1px); }
.mobile-toggle { display: none; background: none; border: none; color: rgba(255,255,255,0.8); cursor: pointer; }
.mobile-menu { display: none; padding: 1.5rem 1rem; background: rgba(18, 28, 48, 0.97); backdrop-filter: blur(20px); border-bottom: 1px solid rgba(0, 212, 255, 0.1); }
.mobile-menu.open { display: block; }
.mobile-link { display: block; padding: 12px 16px; font-size: 0.875rem; font-weight: 500; color: rgba(255,255,255,0.7); border-radius: 6px; transition: all 0.3s; }
.mobile-link:hover, .mobile-link.active { color: var(--geo-cyan); background: rgba(0, 212, 255, 0.08); }
.mobile-cta { display: block; text-align: center; margin-top: 16px; padding: 12px 20px; background: linear-gradient(135deg, var(--geo-cyan), var(--geo-blue)); color: var(--geo-dark); font-weight: 600; border-radius: 6px; }
@media (max-width: 768px) { .nav-links { display: none; } .mobile-toggle { display: block; } .brand-sub { display: none; } }

/* ── Buttons ── */
.btn-geo { display: inline-flex; align-items: center; gap: 8px; padding: 14px 32px; background: linear-gradient(135deg, var(--geo-cyan), var(--geo-blue)); color: var(--geo-dark); font-size: 0.875rem; font-weight: 600; border-radius: 8px; transition: all 0.3s; border: none; cursor: pointer; }
.btn-geo:hover { box-shadow: var(--geo-glow-cyan); transform: translateY(-2px); }
.btn-geo .btn-icon { width: 16px; height: 16px; transition: transform 0.3s; }
.btn-geo:hover .btn-icon { transform: translateX(4px); }
.btn-geo-outline { display: inline-flex; align-items: center; gap: 8px; padding: 14px 32px; border: 1px solid var(--geo-cyan); color: var(--geo-cyan); font-size: 0.875rem; font-weight: 500; border-radius: 8px; background: transparent; transition: all 0.3s; cursor: pointer; }
.btn-geo-outline:hover { background: rgba(0, 212, 255, 0.1); box-shadow: var(--geo-glow-cyan); }
.btn-sm { padding: 10px 24px; font-size: 0.8rem; }

/* ── Sections ── */
.section { padding: 3.2rem 0; position: relative; }
.section-alt { background: linear-gradient(135deg, rgba(8, 28, 60, 0.6), rgba(0, 100, 220, 0.12)); }
.section-header { text-align: center; margin-bottom: 2.2rem; }
.section-tag { display: block; font-family: var(--font-mono); font-size: 0.7rem; color: var(--geo-cyan); letter-spacing: 0.3em; margin-bottom: 0.75rem; }
.section-tag.tag-green { color: var(--geo-green); }
.section-title { font-family: var(--font-display); font-size: clamp(1.75rem, 4vw, 2.75rem); font-weight: 700; color: #fff; margin-bottom: 0.75rem; }
.section-desc { color: rgba(255,255,255,0.55); max-width: 36rem; margin: 0 auto; font-size: 0.95rem; }
.geo-divider { height: 1px; background: linear-gradient(90deg, transparent, var(--geo-cyan), var(--geo-green), transparent); opacity: 0.3; margin-bottom: 3rem; }

/* ── Hero ── */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; opacity: 0.35; }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(to bottom, rgba(11,37,69,0.55), rgba(11,37,69,0.25), var(--geo-dark)); }
.hero-content { position: relative; z-index: 10; padding-top: 7rem; padding-bottom: 4rem; }
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: center; }
@media (max-width: 1024px) { .hero-grid { grid-template-columns: 1fr; } .hero-right { display: none; } }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; padding: 6px 16px; border-radius: 9999px; border: 1px solid rgba(0, 212, 255, 0.2); background: rgba(0, 212, 255, 0.05); margin-bottom: 1.5rem; }
.badge-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--geo-green); animation: pulse 2s infinite; }
.hero-badge span { font-family: var(--font-mono); font-size: 0.7rem; color: var(--geo-cyan); letter-spacing: 0.1em; }
.hero-title { font-family: var(--font-display); font-size: clamp(2.25rem, 5.5vw, 4rem); font-weight: 700; line-height: 1.1; margin-bottom: 1.25rem; }
.hero-desc { font-size: 1rem; color: rgba(255,255,255,0.5); max-width: 30rem; margin-bottom: 2rem; line-height: 1.8; min-height: 3.5rem; }
.hero-buttons { display: flex; flex-wrap: wrap; gap: 1rem; }

/* Earth */
.earth-container { position: relative; width: 420px; height: 420px; margin: 0 auto; }
.earth-glow { position: absolute; inset: -20px; border-radius: 50%; background: linear-gradient(135deg, rgba(0,212,255,0.1), rgba(0,255,136,0.05)); filter: blur(20px); animation: pulse 4s ease-in-out infinite; }
.earth-img { width: 100%; height: 100%; object-fit: contain; position: relative; z-index: 10; border-radius: 50%; animation: float 6s ease-in-out infinite; border: none; overflow: hidden; box-shadow: 0 0 0 transparent; }
.orbit { position: absolute; border-radius: 50%; border: 1px solid rgba(0, 212, 255, 0.1); }
.orbit-1 { inset: -10px; animation: orbit 20s linear infinite; }
.orbit-2 { inset: -30px; border-color: rgba(0, 255, 136, 0.06); animation: orbit 35s linear infinite reverse; }
.orbit-dot { position: absolute; border-radius: 50%; }
.dot-cyan { top: 0; left: 50%; transform: translate(-50%, -50%); width: 10px; height: 10px; background: var(--geo-cyan); box-shadow: 0 0 10px rgba(0, 212, 255, 0.5); }
.dot-green { bottom: 0; left: 50%; transform: translate(-50%, 50%); width: 7px; height: 7px; background: var(--geo-green); box-shadow: 0 0 8px rgba(0, 255, 136, 0.4); }
.scroll-indicator { position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%); animation: bounce 2s infinite; }
.scroll-mouse { width: 22px; height: 36px; border-radius: 11px; border: 2px solid rgba(0, 212, 255, 0.3); display: flex; align-items: flex-start; justify-content: center; padding-top: 5px; }
.scroll-dot { width: 5px; height: 10px; border-radius: 3px; background: var(--geo-cyan); }

/* ── Cards ── */
.geo-card { background: linear-gradient(135deg, rgba(15, 21, 35, 0.9), rgba(20, 28, 46, 0.7)); border: 1px solid rgba(0, 212, 255, 0.12); backdrop-filter: blur(10px); transition: all 0.4s ease; border-radius: 12px; }
.geo-card:hover { border-color: rgba(0, 212, 255, 0.35); box-shadow: 0 8px 32px rgba(0, 153, 255, 0.12); transform: translateY(-6px); }

/* Service Cards */
.services-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
@media (max-width: 1024px) { .services-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .services-grid { grid-template-columns: 1fr; } }
.service-card { position: relative; border-radius: 12px; overflow: hidden; background: linear-gradient(135deg, rgba(25, 38, 65, 0.75), rgba(30, 45, 75, 0.55)); border: 1px solid rgba(0, 212, 255, 0.1); transition: all 0.5s ease; }
.service-card:hover { border-color: rgba(0, 212, 255, 0.3); transform: translateY(-8px); box-shadow: 0 20px 40px rgba(0, 212, 255, 0.1); }
.service-image { width: 100%; height: 180px; overflow: hidden; }
.service-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.7s ease; }
.service-card:hover .service-image img { transform: scale(1.1); }
.service-content { padding: 1.5rem; }
.service-content h3 { font-family: var(--font-display); font-size: 1.125rem; font-weight: 700; color: #fff; margin-bottom: 0.5rem; }
.service-content p { font-size: 0.8rem; color: rgba(255,255,255,0.4); line-height: 1.6; margin-bottom: 1rem; }
.service-link { font-size: 0.8rem; color: var(--geo-cyan); font-weight: 500; display: inline-flex; align-items: center; gap: 4px; transition: all 0.3s; }
.service-link:hover { gap: 8px; }
.service-link i { width: 14px; height: 14px; }
.service-bar { position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: linear-gradient(to right, var(--geo-cyan), var(--geo-green)); transition: width 0.7s ease; }
.service-card:hover .service-bar { width: 100%; }

/* Case Cards */
.cases-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
@media (max-width: 1024px) { .cases-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .cases-grid { grid-template-columns: 1fr; } }
.case-card { position: relative; border-radius: 12px; overflow: hidden; background: linear-gradient(135deg, rgba(25, 38, 65, 0.75), rgba(30, 45, 75, 0.55)); border: 1px solid rgba(0, 212, 255, 0.08); transition: opacity 0.28s ease, transform 0.28s ease, border-color 0.35s ease, box-shadow 0.35s ease; }
.case-card:hover { border-color: rgba(0, 212, 255, 0.25); transform: translateY(-6px); }
.case-image { width: 100%; height: 200px; overflow: hidden; position: relative; }
.case-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.7s; }
.case-card:hover .case-image img { transform: scale(1.08); }
.case-tag { position: absolute; top: 12px; left: 12px; padding: 4px 10px; font-size: 0.65rem; border-radius: 4px; background: rgba(0, 212, 255, 0.15); border: 1px solid rgba(0, 212, 255, 0.3); color: var(--geo-cyan); font-family: var(--font-mono); backdrop-filter: blur(4px); }
.case-content { padding: 1.25rem; }
.case-content h3 { font-size: 1rem; font-weight: 600; color: #fff; margin-bottom: 0.5rem; }
.case-content p { font-size: 0.8rem; color: rgba(255,255,255,0.4); line-height: 1.5; }

/* Stats */
.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
@media (max-width: 768px) { .stats-row { grid-template-columns: repeat(2, 1fr); } }
.stat-card { padding: 1.5rem; border-radius: 12px; background: linear-gradient(145deg, rgba(15, 21, 35, 0.9), rgba(26, 37, 64, 0.7)); border: 1px solid rgba(0, 212, 255, 0.12); text-align: center; transition: all 0.4s; }
.stat-card:hover { transform: scale(1.05); border-color: rgba(0, 212, 255, 0.35); box-shadow: 0 8px 24px rgba(0, 153, 255, 0.1); }
.stat-value { display: inline; font-family: var(--font-display); font-size: clamp(1.75rem, 3vw, 2.5rem); font-weight: 700; background: linear-gradient(135deg, var(--geo-cyan), var(--geo-green)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.stat-suffix { display: inline; font-family: var(--font-display); font-size: 1.25rem; font-weight: 700; background: linear-gradient(135deg, var(--geo-cyan), var(--geo-green)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.stat-label { color: #fff; font-weight: 500; margin-top: 0.5rem; font-size: 0.875rem; }

/* CTA */
.cta-box { position: relative; border-radius: 1rem; overflow: hidden; padding: 4rem 2.5rem; text-align: center; }
.cta-bg { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(0,212,255,0.12), rgba(0,153,255,0.08), rgba(0,255,136,0.12)); }
.cta-border { position: absolute; inset: 0; border: 1px solid rgba(0, 212, 255, 0.15); border-radius: 1rem; }
.cta-corner-tl { position: absolute; top: 0; left: 0; width: 60px; height: 60px; border-top: 2px solid rgba(0, 212, 255, 0.3); border-left: 2px solid rgba(0, 212, 255, 0.3); border-radius: 1rem 0 0 0; }
.cta-corner-br { position: absolute; bottom: 0; right: 0; width: 60px; height: 60px; border-bottom: 2px solid rgba(0, 255, 136, 0.3); border-right: 2px solid rgba(0, 255, 136, 0.3); border-radius: 0 0 1rem 0; }
.cta-content { position: relative; z-index: 10; }
.cta-content h2 { font-family: var(--font-display); font-size: clamp(1.5rem, 3.5vw, 2.5rem); font-weight: 700; color: #fff; margin-bottom: 0.75rem; }
.cta-content p { color: rgba(255,255,255,0.4); max-width: 30rem; margin: 0 auto 2rem; font-size: 0.9rem; }
.cta-buttons { display: flex; flex-wrap: wrap; justify-content: center; gap: 1rem; }

/* ── Page Hero ── */
.page-hero { position: relative; padding: 9rem 0 4rem; overflow: hidden; text-align: center; }
.page-hero-bg { position: absolute; inset: 0; }
.page-hero-bg img { width: 100%; height: 100%; object-fit: cover; opacity: 0.2; }
.page-hero-overlay { position: absolute; inset: 0; background: linear-gradient(to bottom, rgba(11,37,69,0.65), var(--geo-dark)); }
.page-hero-content { position: relative; z-index: 10; }
.page-title { font-family: var(--font-display); font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 700; color: #fff; margin-bottom: 0.75rem; }
.page-desc { color: rgba(255,255,255,0.4); max-width: 36rem; margin: 0 auto; font-size: 1rem; }

/* ── Split Layout ── */
.split-section { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.split-section.reverse { direction: rtl; }
.split-section.reverse > * { direction: ltr; }
@media (max-width: 1024px) { .split-section, .split-section.reverse { grid-template-columns: 1fr; direction: ltr; } }
.text-content p { color: rgba(255,255,255,0.5); line-height: 1.8; margin-bottom: 1rem; font-size: 0.9rem; }
.image-card { position: relative; border-radius: 12px; overflow: hidden; }
.image-card img { width: 100%; height: auto; border-radius: 12px; transition: transform 0.7s ease; }
.image-card:hover img { transform: scale(1.05); }
.image-overlay { position: absolute; inset: 0; background: linear-gradient(to top, var(--geo-dark), transparent); opacity: 0.5; }
.image-border { position: absolute; inset: 0; border: 1px solid rgba(0, 212, 255, 0.1); border-radius: 12px; }

/* Feature List */
.feature-list { margin-top: 1.5rem; display: flex; flex-direction: column; gap: 0.75rem; }
.feature-item { display: flex; align-items: center; gap: 12px; padding: 0.875rem; border-radius: 8px; border: 1px solid rgba(0, 212, 255, 0.06); background: rgba(0, 212, 255, 0.02); transition: all 0.3s; }
.feature-item:hover { border-color: rgba(0, 212, 255, 0.15); transform: translateX(6px); }
.feature-item i { width: 18px; height: 18px; flex-shrink: 0; }
.feature-item strong { color: #fff; font-size: 0.8rem; }
.feature-item span { color: rgba(255,255,255,0.35); font-size: 0.8rem; margin-left: 0.5rem; }

/* Flow Steps */
.flow-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem; }
@media (max-width: 1024px) { .flow-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .flow-grid { grid-template-columns: 1fr; } }
.flow-card { position: relative; padding: 1.75rem; border-radius: 12px; background: linear-gradient(135deg, rgba(25, 38, 65, 0.75), rgba(30, 45, 75, 0.55)); border: 1px solid rgba(0, 212, 255, 0.1); overflow: hidden; transition: all 0.4s ease; }
.flow-card:hover { border-color: rgba(0, 212, 255, 0.3); box-shadow: 0 0 30px rgba(0, 212, 255, 0.08); transform: translateY(-6px); }
.flow-number { position: absolute; top: 0.75rem; right: 0.75rem; font-size: 3rem; font-weight: 700; font-family: var(--font-display); color: rgba(255,255,255,0.03); line-height: 1; }
.flow-icon { width: 44px; height: 44px; border-radius: 10px; display: flex; align-items: center; justify-content: center; margin-bottom: 1rem; transition: all 0.3s; }
.flow-card:hover .flow-icon { transform: scale(1.1); }
.flow-icon i { width: 20px; height: 20px; }
.flow-title { font-family: var(--font-display); font-size: 1.05rem; font-weight: 700; color: #fff; margin-bottom: 0.5rem; }
.flow-card:hover .flow-title { background: linear-gradient(135deg, var(--geo-cyan), var(--geo-green)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.flow-desc { font-size: 0.8rem; color: rgba(255,255,255,0.4); line-height: 1.5; }
.flow-bar { position: absolute; bottom: 0; left: 0; width: 0; height: 2px; transition: width 0.7s ease; }
.flow-card:hover .flow-bar { width: 100%; }

/* FAQ */
.faq-list { max-width: 48rem; margin: 0 auto; }
.faq-item { border: 1px solid rgba(0, 212, 255, 0.08); border-radius: 10px; margin-bottom: 1rem; overflow: hidden; background: rgba(0, 212, 255, 0.02); transition: all 0.3s; }
.faq-item:hover { border-color: rgba(0, 212, 255, 0.2); }
.faq-question { display: flex; align-items: center; justify-content: space-between; padding: 1.25rem 1.5rem; cursor: pointer; font-weight: 600; color: #fff; font-size: 0.9rem; }
.faq-question i { width: 18px; height: 18px; color: var(--geo-cyan); transition: transform 0.3s; }
.faq-item.open .faq-question i { transform: rotate(180deg); }
.faq-answer { padding: 0 1.5rem 1.25rem; color: rgba(255,255,255,0.5); font-size: 0.85rem; line-height: 1.7; display: none; }
.faq-item.open .faq-answer { display: block; }

/* Compare Table */
.compare-table { width: 100%; border-collapse: collapse; margin: 2rem 0; }
.compare-table th, .compare-table td { padding: 1rem 1.25rem; text-align: left; border-bottom: 1px solid rgba(0, 212, 255, 0.08); font-size: 0.85rem; }
.compare-table th { color: var(--geo-cyan); font-weight: 600; font-size: 0.8rem; letter-spacing: 0.05em; }
.compare-table td { color: rgba(255,255,255,0.6); }
.compare-table tr:hover td { background: rgba(0, 212, 255, 0.03); }
.compare-table .highlight { color: var(--geo-green); font-weight: 500; }

/* Timeline */
.timeline { position: relative; max-width: 48rem; margin: 0 auto; padding-left: 2rem; }
.timeline::before { content: ''; position: absolute; top: 0; left: 0; width: 2px; height: 100%; background: linear-gradient(to bottom, var(--geo-cyan), var(--geo-green), var(--geo-blue)); opacity: 0.3; }
.timeline-item { position: relative; padding: 0 0 2.5rem 2.5rem; }
.timeline-dot { position: absolute; left: -2rem; top: 0.5rem; width: 14px; height: 14px; border-radius: 50%; border: 2px solid var(--geo-cyan); background: var(--geo-dark); transition: all 0.3s; }
.timeline-item:hover .timeline-dot { background: var(--geo-cyan); box-shadow: 0 0 12px rgba(0, 212, 255, 0.5); }
.timeline-phase { font-family: var(--font-mono); font-size: 0.7rem; color: var(--geo-cyan); letter-spacing: 0.1em; margin-bottom: 0.4rem; }
.timeline-title { font-family: var(--font-display); font-size: 1.25rem; font-weight: 700; color: #fff; margin-bottom: 0.5rem; }
.timeline-desc { font-size: 0.85rem; color: rgba(255,255,255,0.4); line-height: 1.7; }

/* Detail Page */
.detail-section { padding: 4rem 0; }
.detail-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
@media (max-width: 1024px) { .detail-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .detail-grid { grid-template-columns: 1fr; } }
.detail-card { padding: 1.75rem; border-radius: 12px; border: 1px solid rgba(0, 212, 255, 0.08); background: rgba(0, 212, 255, 0.02); transition: all 0.4s; }
.detail-card:hover { border-color: rgba(0, 212, 255, 0.2); transform: translateY(-4px); }
.detail-card h4 { color: #fff; font-size: 1rem; font-weight: 600; margin-bottom: 0.5rem; }
.detail-card p { color: rgba(255,255,255,0.4); font-size: 0.8rem; line-height: 1.6; }

/* Contact - New Layout */
.contact-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.contact-card {
  background: linear-gradient(135deg, rgba(25, 38, 65, 0.75), rgba(30, 45, 75, 0.55));
  border: 1px solid rgba(0, 212, 255, 0.1);
  border-radius: 16px;
  padding: 2rem;
  text-align: center;
  transition: all 0.3s ease;
}

#wechat-card {
  cursor: pointer;
}

.contact-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 212, 255, 0.3);
  box-shadow: 0 20px 40px rgba(0, 212, 255, 0.08);
}

.contact-card-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.15), rgba(0, 153, 255, 0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.25rem;
}

.contact-card-icon i {
  width: 28px;
  height: 28px;
  color: var(--geo-cyan);
}

.contact-card h3 {
  color: #fff;
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.contact-card p {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.contact-card-link {
  display: inline-block;
  color: var(--geo-cyan);
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.3s;
}

.contact-card-link:hover {
  color: var(--geo-green);
  text-decoration: underline;
}

.contact-details-section {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.contact-detail-block {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1.5rem;
  background: rgba(0, 212, 255, 0.02);
  border: 1px solid rgba(0, 212, 255, 0.08);
  border-radius: 12px;
}

.contact-detail-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(0, 212, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-detail-icon i {
  width: 22px;
  height: 22px;
  color: var(--geo-cyan);
}

.contact-detail-content h3 {
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.contact-detail-content p {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.85rem;
}

.cta-section {
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.08), rgba(0, 153, 255, 0.04));
  border: 1px solid rgba(0, 212, 255, 0.15);
  border-radius: 16px;
  padding: 3rem;
  text-align: center;
}

.cta-section h3 {
  color: #fff;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.cta-section p {
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

.cta-section .cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

@media (max-width: 1024px) {
  .contact-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .contact-cards-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-details-section {
    grid-template-columns: 1fr;
  }
  
  .cta-section {
    padding: 2rem 1.5rem;
  }
  
  .cta-section .cta-buttons {
    flex-direction: column;
  }
}
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; font-size: 0.8rem; font-weight: 500; color: rgba(255,255,255,0.7); margin-bottom: 0.4rem; }
.form-group input, .form-group textarea, .form-group select { width: 100%; padding: 10px 14px; background: rgba(0, 212, 255, 0.05); border: 1px solid rgba(0, 212, 255, 0.15); border-radius: 8px; color: #fff; font-size: 0.8rem; font-family: inherit; transition: all 0.3s; outline: none; }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { border-color: var(--geo-cyan); box-shadow: 0 0 12px rgba(0, 212, 255, 0.15); }
.form-group textarea { min-height: 100px; resize: vertical; }
.form-group select { 
  appearance: none; 
  cursor: pointer; 
  position: relative;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='rgba(255,255,255,0.6)' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 16px;
}

/* Select options styling - WCAG AA compliant */
.form-group select option {
  background-color: #1a2634;
  color: #ffffff;
  padding: 8px 12px;
  font-family: inherit;
}

.form-group select option:hover,
.form-group select option:focus {
  background-color: #00d4ff;
  color: #0a1628;
}

.form-group select option:checked {
  background-color: #00d4ff;
  color: #0a1628;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 640px) { .form-row { grid-template-columns: 1fr; } }
.form-submit { width: 100%; padding: 12px; background: linear-gradient(135deg, var(--geo-cyan), var(--geo-blue)); color: var(--geo-dark); font-size: 0.85rem; font-weight: 600; border: none; border-radius: 8px; cursor: pointer; transition: all 0.3s; font-family: inherit; }
.form-submit:hover { box-shadow: var(--geo-glow-cyan); transform: translateY(-2px); }

/* ── Footer ── */
.footer { border-top: 1px solid rgba(0, 212, 255, 0.15); background: linear-gradient(180deg, rgba(22, 34, 58, 0.95), rgba(18, 28, 50, 0.98)); padding: 2.5rem 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 2rem; }
@media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-desc { font-size: 0.8rem; color: rgba(255,255,255,0.4); margin-top: 0.75rem; line-height: 1.7; }
.footer-logo-link { display: inline-flex; align-items: center; width: fit-content; }
.footer-logo { height: 48px; width: auto; object-fit: contain; display: block; }
.footer-links h4, .footer-social h4 { font-size: 0.8rem; font-weight: 500; color: var(--geo-cyan); letter-spacing: 0.1em; margin-bottom: 0.75rem; font-family: var(--font-display); }
.footer-links li { margin-bottom: 0.5rem; }
.footer-links a, .footer-links span { font-size: 0.8rem; color: rgba(255,255,255,0.4); transition: color 0.3s; }
.footer-links a:hover { color: var(--geo-cyan); }
.social-icons { display: flex; gap: 0.5rem; }
.social-icon { width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; border-radius: 8px; border: 1px solid rgba(0, 212, 255, 0.15); color: rgba(255,255,255,0.4); transition: all 0.3s; }
.social-icon:hover { color: var(--geo-cyan); border-color: rgba(0, 212, 255, 0.4); background: rgba(0, 212, 255, 0.05); }
.social-icon i { width: 14px; height: 14px; }
.footer-email { font-size: 0.7rem; color: rgba(255,255,255,0.3); margin-top: 1rem; }
.footer-bottom { margin-top: 1.75rem; padding: 1.5rem 0; border-top: 1px solid rgba(0, 212, 255, 0.08); display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; }
.footer-bottom p { font-size: 0.7rem; color: rgba(255,255,255,0.3); }
.footer-legal { display: flex; gap: 1.5rem; }
.footer-legal span { font-size: 0.7rem; color: rgba(255,255,255,0.3); cursor: pointer; transition: color 0.3s; }
.footer-legal span:hover { color: rgba(255,255,255,0.5); }

/* ── Animations ── */
@keyframes float { 0%, 100% { transform: translateY(0px); } 50% { transform: translateY(-12px); } }
@keyframes orbit { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }
@keyframes bounce { 0%, 100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(8px); } }
.animate-on-scroll { opacity: 0; transform: translateY(30px); transition: opacity 0.7s ease, transform 0.7s ease; }
.animate-on-scroll.visible { opacity: 1; transform: translateY(0); }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--geo-dark); }
::-webkit-scrollbar-thumb { background: rgba(0, 212, 255, 0.3); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(0, 212, 255, 0.5); }

/* ═══════════════════════════════════════════════════
   OPTIMIZED ADDITIONS
   ═══════════════════════════════════════════════════ */

/* ── Performance hints ── */
.particle-canvas,
.hero-bg img,
.earth-img,
.orbit { will-change: transform; }
.animate-on-scroll { will-change: opacity, transform; }

/* ── Scroll To Top Button ── */
.scroll-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 999;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--geo-cyan), var(--geo-blue));
  border: none;
  color: var(--geo-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 0.35s ease, transform 0.35s ease, box-shadow 0.3s;
  box-shadow: 0 4px 16px rgba(0, 212, 255, 0.2);
}
.scroll-to-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.scroll-to-top:hover {
  box-shadow: 0 6px 24px rgba(0, 212, 255, 0.5);
  transform: translateY(-2px);
}
@media (max-width: 640px) { .scroll-to-top { bottom: 1.25rem; right: 1.25rem; } }

/* ── Enhanced Card Glassmorphism ── */
.service-card {
  background: linear-gradient(145deg, rgba(26, 37, 64, 0.7), rgba(20, 28, 46, 0.85));
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(0, 212, 255, 0.08);
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1),
              border-color 0.35s ease,
              box-shadow 0.35s ease;
}
.service-card:hover {
  transform: translateY(-6px) scale(1.01);
  border-color: rgba(0, 212, 255, 0.25);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(0, 212, 255, 0.08), inset 0 1px 0 rgba(255,255,255,0.04);
}
.service-card:hover .service-bar {
  width: 100%;
}

.case-card {
  background: linear-gradient(145deg, rgba(26, 37, 64, 0.65), rgba(20, 28, 46, 0.8));
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(0, 212, 255, 0.07);
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1),
              border-color 0.35s ease,
              box-shadow 0.35s ease;
}
.case-card:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 212, 255, 0.2);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(0, 212, 255, 0.06);
}

.stat-card {
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.3s ease;
}
.stat-card:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 12px 32px rgba(0, 212, 255, 0.15);
}

.detail-card {
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1),
              border-color 0.3s ease,
              background 0.3s ease;
}
.detail-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 212, 255, 0.3);
  background: linear-gradient(145deg, rgba(0, 212, 255, 0.05), rgba(0, 153, 255, 0.03));
}

/* ── Smoother animate-on-scroll ── */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.65s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
}
.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Nav link underline animation ── */
.nav-link { position: relative; overflow: hidden; }
.nav-link::before {
  content: '';
  position: absolute;
  bottom: 0; left: 50%; right: 50%;
  height: 2px;
  background: linear-gradient(to right, var(--geo-cyan), var(--geo-green));
  border-radius: 1px;
  transition: left 0.3s ease, right 0.3s ease;
}
.nav-link:hover::before, .nav-link.active::before {
  left: 8px; right: 8px;
}
/* Remove old ::after underline since we switched to ::before */
.nav-link.active::after { display: none; }

/* image lazy load: handled natively by browser */

/* ── Focus ring (accessibility) ── */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--geo-cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ── Selection color ── */
::selection {
  background: rgba(0, 212, 255, 0.25);
  color: #fff;
}

/* ── Gradient border on CTA box ── */
.cta-box {
  position: relative;
  isolation: isolate;
}
.cta-box::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.3), rgba(0, 255, 136, 0.15), rgba(0, 153, 255, 0.3));
  z-index: -1;
  opacity: 0;
  transition: opacity 0.4s ease;
}
.cta-box:hover::before { opacity: 1; }

/* ── Filter Bar (Cases page) ── */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  justify-content: center;
  margin-bottom: 2.5rem;
}
.filter-btn {
  padding: 7px 20px;
  font-size: 0.78rem;
  font-family: inherit;
  font-weight: 500;
  border-radius: 9999px;
  border: 1px solid rgba(0, 212, 255, 0.25);
  background: rgba(0, 212, 255, 0.05);
  color: rgba(255, 255, 255, 0.65);
  cursor: pointer;
  transition: all 0.25s ease, transform 0.2s cubic-bezier(0.34,1.56,0.64,1), box-shadow 0.25s ease;
  letter-spacing: 0.02em;
}
.filter-btn:hover {
  border-color: rgba(0, 212, 255, 0.5);
  color: rgba(255, 255, 255, 0.9);
  background: rgba(0, 212, 255, 0.1);
}
.filter-btn.active {
  background: linear-gradient(135deg, var(--geo-cyan), var(--geo-blue));
  border-color: transparent;
  color: #051525;
  font-weight: 700;
  box-shadow: 0 0 0 2px rgba(0,212,255,0.5), 0 6px 20px rgba(0, 212, 255, 0.45);
  transform: scale(1.06);
  letter-spacing: 0.03em;
}
.case-card {
  transition: opacity 0.3s ease, transform 0.3s ease,
              border-color 0.35s ease, box-shadow 0.35s ease;
}

/* ── Logo image in navbar ── */
.nav-logo {
  height: 48px;
  width: auto;
  display: block;
  object-fit: contain;
  transition: opacity 0.3s ease;
}
.nav-brand:hover .nav-logo { opacity: 0.82; }

/* ── QR Code Modal ── */
.qr-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 9999;
}

.qr-modal.open {
  display: block;
}

.qr-modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  animation: fadeIn 0.25s ease;
}

.qr-modal-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.9);
  background: linear-gradient(145deg, rgba(20, 32, 55, 0.98), rgba(15, 24, 42, 0.98));
  border: 1px solid rgba(0, 212, 255, 0.25);
  border-radius: 20px;
  padding: 2.5rem;
  max-width: 360px;
  width: 90%;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.6), 0 0 40px rgba(0, 212, 255, 0.1);
  animation: modalIn 0.35s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.85);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
}

.qr-modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(0, 0, 0, 0.3);
  color: rgba(255, 255, 255, 0.7);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.25s ease;
}

.qr-modal-close:hover {
  background: rgba(0, 212, 255, 0.15);
  border-color: rgba(0, 212, 255, 0.4);
  color: #fff;
  transform: rotate(90deg);
}

.qr-modal-header {
  text-align: center;
  margin-bottom: 1.5rem;
}

.qr-icon {
  width: 48px;
  height: 48px;
  color: var(--geo-cyan);
  margin-bottom: 0.75rem;
}

.qr-modal-header h3 {
  color: #fff;
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.qr-modal-header p {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.9rem;
}

.qr-image-container {
  background: #fff;
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1rem;
}

.qr-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
  background: linear-gradient(135deg, #f5f7fa 0%, #e9ecef 100%);
  border-radius: 8px;
  min-height: 200px;
}

.qr-placeholder-icon {
  width: 64px;
  height: 64px;
  color: #333;
  margin-bottom: 1rem;
}

.qr-placeholder-text {
  color: #555;
  font-size: 0.95rem;
  font-weight: 500;
}

.qr-tip {
  text-align: center;
  color: rgba(255, 255, 255, 0.45);
  font-size: 0.85rem;
}

@media (max-width: 480px) {
  .qr-modal-content {
    padding: 1.75rem;
    border-radius: 16px;
  }
  
  .qr-placeholder {
    padding: 1.5rem 1rem;
  }
}

/* Homepage promo popup */
.home-popup {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.home-popup.open {
  display: flex;
}

.home-popup-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  animation: fadeIn 0.22s ease;
}

.home-popup-dialog {
  position: relative;
  z-index: 1;
  width: min(92vw, 430px);
  max-height: 88vh;
  border-radius: 14px;
  overflow: hidden;
  background: #c92713;
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.58), 0 0 0 1px rgba(255, 255, 255, 0.14);
  animation: homePopupIn 0.32s cubic-bezier(0.34, 1.2, 0.64, 1) forwards;
}

.home-popup-dialog img {
  width: 100%;
  max-height: 88vh;
  object-fit: contain;
}

.home-popup-close {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 2;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(255, 255, 255, 0.45);
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.32);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease;
}

.home-popup-close:hover {
  background: rgba(0, 0, 0, 0.5);
  transform: rotate(90deg);
}

.home-popup-close svg {
  width: 20px;
  height: 20px;
}

@keyframes homePopupIn {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.94);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@media (max-width: 480px) {
  .home-popup {
    padding: 14px;
  }

  .home-popup-dialog {
    width: min(94vw, 360px);
    max-height: 86vh;
    border-radius: 12px;
  }

  .home-popup-dialog img {
    max-height: 86vh;
  }
}