:root {
  --bg: #ffffff; --bg-alt: #f8fafc; --bg-tint: #eff6ff;
  --text: #0f172a; --text-body: #334155; --text-muted: #64748b;
  --primary: #1d4ed8; --primary-bright: #2563eb; --primary-hover: #1e40af;
  --green: #059669; --green-bg: #f0fdf4; --border: #E2E8F0;
  --radius: 12px; --btn-radius: 8px; --shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { overflow-x: hidden; max-width: 100vw; }
body {
  font-family: "Be Vietnam Pro", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg); color: var(--text-body); font-size: 16px; line-height: 1.6;
}
h1, h2, h3, h4, strong { color: var(--text); }
a { color: inherit; text-decoration: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; width: 100%; }

.site-header {
  position: sticky; top: 0; z-index: 50; background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px); border-bottom: 1px solid var(--border);
}
.nav-row, .topbar-inner { display: flex; align-items: center; justify-content: space-between; min-height: 68px; gap: 12px; }
.brand-logo, .brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.25rem; color: var(--text); min-width: 0; flex-shrink: 0; }
.brand-mark { display: inline-flex; align-items: center; justify-content: center; width: 32px; height: 32px; flex-shrink: 0; }
.brand-svg { width: 100%; height: 100%; display: block; }
.badge-pill {
  font-size: 0.76rem; font-weight: 600; padding: 4px 10px;
  border-radius: 6px; background: var(--bg-alt); color: var(--text-body); border: 1px solid var(--border);
}
.nav-links { display: flex; gap: 20px; font-size: 0.92rem; font-weight: 500; color: var(--text-body); }
.nav-links a:hover { color: var(--primary); }
.nav-actions { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }

.btn-primary, .btn-secondary, .btn-ghost, .btn-approve, .btn-outline-sm {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 10px 18px; border-radius: var(--btn-radius); font-weight: 600; font-size: 0.92rem;
  cursor: pointer; border: 1px solid transparent; transition: background 0.15s ease, border-color 0.15s ease; text-align: center;
}
.btn-primary { background: var(--primary); color: #ffffff; border-color: var(--primary); box-shadow: var(--shadow); }
.btn-primary:hover { background: var(--primary-hover); }
.btn-secondary { background: #ffffff; border-color: var(--border); color: var(--text); box-shadow: var(--shadow); }
.btn-secondary:hover { background: var(--bg-alt); border-color: #cbd5e1; }
.btn-ghost { background: #ffffff; border-color: var(--border); color: var(--text-body); }
.btn-lg { padding: 12px 22px; font-size: 0.98rem; }
.btn-block { width: 100%; padding: 12px; margin-top: 12px; }

.hero-section { background: var(--bg); padding: 48px 0 56px; border-bottom: 1px solid var(--border); }
.hero-grid { display: grid; grid-template-columns: 1.04fr 0.96fr; gap: 36px; align-items: center; }
.eyebrow {
  display: inline-block; font-size: 0.82rem; font-weight: 600; color: var(--primary);
  background: var(--bg-tint); border: 1px solid #dbeafe; padding: 6px 12px; border-radius: 6px; margin-bottom: 14px;
}
.hero-copy h1 { font-size: clamp(1.6rem, 3.6vw, 2.3rem); line-height: 1.25; font-weight: 700; margin-bottom: 14px; letter-spacing: -0.015em; }
.hero-sub { color: var(--text-body); font-size: clamp(0.96rem, 2vw, 1.06rem); margin-bottom: 24px; }
.hero-cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 28px; }
.trust-metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; border-top: 1px solid var(--border); padding-top: 20px; }
.trust-metrics strong { display: block; font-size: 0.98rem; color: var(--text); margin-bottom: 4px; }
.trust-metrics span { font-size: 0.84rem; color: var(--text-muted); }

.hero-video-card { background: #ffffff; border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); min-width: 0; }
.video-toolbar { display: flex; flex-direction: column; gap: 8px; margin-bottom: 12px; }
.video-toolbar-label { font-size: 0.85rem; font-weight: 600; color: var(--text-body); }
.video-lang-btns { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.video-lang-btn {
  padding: 8px 12px; border-radius: var(--btn-radius); border: 1px solid var(--border); min-height: 40px;
  background: var(--bg-alt); color: var(--text-body); font-weight: 600; font-size: 0.83rem; cursor: pointer;
}
.video-lang-btn.active { background: var(--primary); color: #ffffff; border-color: var(--primary); }

.video-frame-wrap {
  position: relative; border-radius: 8px; overflow: hidden;
  background: #0f172a; border: 1px solid var(--border); aspect-ratio: 16 / 9;
}
.video-frame-wrap video { width: 100%; height: 100%; display: block; object-fit: cover; }

.section-block { padding: 56px 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-head { text-align: center; max-width: 760px; margin: 0 auto 32px; }
.section-tag { font-size: 0.78rem; font-weight: 600; color: var(--primary); letter-spacing: 0.04em; display: block; margin-bottom: 6px; text-transform: uppercase; }
.section-head h2 { font-size: clamp(1.38rem, 3vw, 1.95rem); line-height: 1.3; font-weight: 700; margin-bottom: 10px; }
.section-head p { color: var(--text-body); font-size: 0.98rem; }

.steps-grid, .pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.step-card, .price-card { background: #ffffff; border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); min-width: 0; word-break: break-word; }
.step-card h3 { font-size: 1.08rem; padding-bottom: 8px; font-weight: 700; }
.step-badge { display: inline-flex; align-items: center; background: var(--bg-alt); color: var(--primary); border: 1px solid var(--border); font-weight: 600; padding: 4px 10px; border-radius: 6px; font-size: 0.82rem; margin-bottom: 12px; }

.shop-tabs, .industry-tabs { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin-bottom: 24px; }
.shop-tab { padding: 10px 16px; border-radius: var(--btn-radius); background: #ffffff; border: 1px solid var(--border); color: var(--text-body); font-weight: 600; font-size: 0.92rem; cursor: pointer; text-align: center; box-shadow: var(--shadow); }
.shop-tab.active { background: var(--primary); color: #ffffff; border-color: var(--primary); }

.demo-workbench, .demo-grid { display: grid; grid-template-columns: 0.92fr 1.08fr; gap: 20px; }
.demo-col { background: #ffffff; border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); min-width: 0; word-break: break-word; }
.panel-header-flex { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.panel-label { font-size: 0.9rem; font-weight: 700; color: var(--text); margin-bottom: 10px; }
.panel-header-flex .panel-label { margin-bottom: 0; }
.edit-hint-pill { font-size: 0.76rem; font-weight: 600; color: var(--green); background: var(--green-bg); border: 1px solid #bbf7d0; padding: 3px 10px; border-radius: 6px; }
.raw-photo-box { background: var(--bg-alt); border: 1px solid var(--border); border-radius: 8px; padding: 16px; margin-bottom: 14px; }
.raw-badge { font-size: 0.88rem; font-weight: 600; color: var(--text); margin-bottom: 10px; }
.visual-stage { min-height: 104px; border-radius: 8px; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: 16px; background: #ffffff; border: 1px dashed #cbd5e1; margin-bottom: 10px; }
.stage-icon { font-size: 0.82rem; font-weight: 700; color: var(--primary); text-transform: uppercase; letter-spacing: 0.04em; padding-bottom: 4px; }
.raw-note, .approval-desc { font-size: 0.9rem; color: var(--text-body); margin-bottom: 12px; }

.approval-card { background: var(--green-bg); border: 1px solid #bbf7d0; border-radius: 8px; padding: 16px; }
.score-pill { display: inline-block; background: #ffffff; color: var(--green); border: 1px solid #bbf7d0; padding: 4px 10px; border-radius: 6px; font-size: 0.8rem; font-weight: 600; margin-bottom: 8px; }
.approval-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.btn-approve { background: var(--green); color: #ffffff; border-color: var(--green); }
.btn-outline-sm { border-color: var(--border); background: #ffffff; color: var(--text); }
.approval-toast { margin-top: 10px; font-size: 0.88rem; color: var(--green); font-weight: 600; }

.enhanced-preview-grid, .platform-previews { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-bottom: 14px; }
.enhanced-card, .plat-card { background: var(--bg-alt); border: 1px solid var(--border); border-radius: 8px; padding: 14px; font-size: 0.88rem; word-break: break-word; overflow-wrap: anywhere; }
.mini-tag { font-size: 0.76rem; color: var(--primary); font-weight: 600; display: block; margin-bottom: 6px; }
.enhanced-card h4 { font-size: 0.95rem; margin-bottom: 6px; }
.plat-card strong { display: block; color: var(--text); margin-bottom: 4px; font-size: 0.9rem; }
[contenteditable="true"]:focus { outline: 2px solid var(--primary-bright); background: #ffffff; border-radius: 4px; padding: 2px 4px; }

.price-card h3 { font-size: 1.22rem; padding-top: 10px; }
.price-card.featured { border: 2px solid var(--primary); }
.price-card.featured .badge-pill { background: var(--bg-tint); color: var(--primary); border-color: #bfdbfe; }
.price-amount { font-size: clamp(1.5rem, 3.2vw, 1.95rem); font-weight: 700; color: var(--text); margin: 10px 0 4px; }
.price-amount small { font-size: 0.86rem; color: var(--text-muted); font-weight: 500; }
.price-sub { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 14px; }
.price-list { list-style: none; margin: 14px 0 20px; display: flex; flex-direction: column; gap: 9px; font-size: 0.9rem; color: var(--text-body); }

.savings-box { background: #ffffff; border: 1px solid var(--border); box-shadow: var(--shadow); border-radius: var(--radius); padding: 28px; display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 28px; align-items: center; }
.savings-desc { margin: 8px 0 16px; font-size: 0.95rem; color: var(--text-body); }
.slider-label { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; font-size: 0.94rem; }
.slider-label strong { color: var(--primary); font-size: 1.02rem; }
input[type="range"] { width: 100%; height: 8px; accent-color: var(--primary); cursor: pointer; }
.savings-stat { background: var(--bg-alt); padding: 14px 16px; border-radius: 8px; margin-bottom: 10px; border: 1px solid var(--border); }
.savings-stat strong { display: block; font-size: clamp(1.15rem, 3vw, 1.4rem); color: var(--green); margin-top: 2px; }

.billing-toggle { display: inline-flex; flex-wrap: wrap; justify-content: center; background: var(--bg-alt); padding: 4px; border-radius: var(--btn-radius); border: 1px solid var(--border); margin-top: 12px; }
.bill-btn { background: transparent; border: none; color: var(--text-body); padding: 8px 14px; border-radius: 6px; cursor: pointer; font-weight: 600; font-size: 0.88rem; }
.bill-btn.active { background: #ffffff; color: var(--text); box-shadow: var(--shadow); border: 1px solid var(--border); }
.site-footer { padding: 28px 0; border-top: 1px solid var(--border); background: #ffffff; font-size: 0.88rem; color: var(--text-muted); }
.footer-row { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.footer-brand-wrap { display: flex; align-items: center; gap: 10px; max-width: 680px; }
.footer-logo-mark { width: 26px; height: 26px; }

@media (max-width: 960px) {
  .hero-grid, .demo-workbench, .demo-grid, .steps-grid, .pricing-grid, .savings-box { grid-template-columns: 1fr; }
  .nav-links, .brand-logo .badge-pill { display: none; }
}
@media (max-width: 768px) {
  .container { padding: 0 16px; }
  .section-block { padding: 40px 0; }
  .topbar-inner { min-height: 60px; gap: 8px; }
  .trust-metrics, .enhanced-preview-grid, .platform-previews { grid-template-columns: 1fr; }
  .demo-col, .step-card, .price-card, .savings-box, .hero-video-card { padding: 16px; }
}
@media (max-width: 640px) {
  .hero-section { padding: 28px 0 36px; }
  .hero-cta-row .btn-lg, .approval-actions > * { width: 100%; }
  .video-lang-btns, .industry-tabs, .shop-tabs { grid-template-columns: 1fr; display: grid; }
  .billing-toggle { width: 100%; }
  .bill-btn { flex: 1 1 auto; text-align: center; }
}