/* ============================================================
   style.css — Custom LED Lightstick Manufacturer
   内联 <style> 提取 → 本地静态化
   ============================================================ */

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Inter', sans-serif;
  background: #000;
  color: #fff;
  scroll-behavior: smooth;
  overflow-x: hidden;
  line-height: 1.9;
  font-size: 18px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Space Grotesk', sans-serif;
  text-transform: uppercase;
}

:root {
  --bg-primary: #000000;
  --bg-secondary: #0a0a0a;
  --bg-surface: #111111;
  --bg-card: #141414;
  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --text-muted: #666666;
  --accent-indigo: #6366f1;
  --accent-cyan: #06b6d4;
  --accent-indigo-hover: #4f46e5;
  --accent-cyan-hover: #0891b2;
  --border-subtle: #1e1e1e;
  --border-medium: #2a2a2a;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
}

/* ====== Navigation ====== */
.nav-bg {
  background: rgba(10, 10, 10, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 60px;
  padding: 0.6rem 2rem;
}

nav {
  position: fixed;
  top: 6px;
  left: 6px;
  right: 6px;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1280px;
  margin: 0 auto;
}

.nav-inner {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.nav-logo img { height: 32px; width: auto; }

.nav-logo span {
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.5em;
  color: rgba(255,255,255,0.7);
}

.nav-logo span strong { color: rgba(255,255,255,0.9); }

.nav-links { display: flex; gap: 28px; list-style: none; }

.nav-links a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--accent-indigo); }

.mobile-toggle { display: none; flex-direction: column; gap: 4px; cursor: pointer; background: none; border: none; padding: 6px; }
.mobile-toggle span { display: block; width: 22px; height: 1.5px; background: #fff; border-radius: 2px; }

/* ====== Hero ====== */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 140px 24px 80px; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; }

.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(0,0,0,0.92) 30%, rgba(0,0,0,0.6) 60%, rgba(0,0,0,0.85) 100%);
  z-index: 1;
}

.hero-glow-1 {
  position: absolute; top: 20%; left: 10%; width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(99,102,241,0.12) 0%, transparent 70%);
  z-index: 1; pointer-events: none;
}

.hero-glow-2 {
  position: absolute; bottom: 10%; right: 5%; width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(6,182,212,0.1) 0%, transparent 70%);
  z-index: 1; pointer-events: none;
}

.hero-content { position: relative; z-index: 2; max-width: 860px; text-align: center; }

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(99,102,241,0.12);
  border: 1px solid rgba(99,102,241,0.2);
  padding: 6px 16px; border-radius: 100px;
  font-size: 11px; font-weight: 500;
  color: var(--accent-indigo); margin-bottom: 28px;
  letter-spacing: 0.3px;
  font-family: 'Space Grotesk', sans-serif; text-transform: uppercase;
}

.hero h1 { font-size: clamp(30px, 5vw, 56px); font-weight: 800; line-height: 1.1; letter-spacing: -1px; margin-bottom: 24px; }

.hero h1 em { font-style: normal; background: linear-gradient(135deg, var(--accent-indigo), var(--accent-cyan)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

.hero-sub { font-size: clamp(17px, 2vw, 20px); color: var(--text-secondary); line-height: 1.9; max-width: 680px; margin: 0 auto 36px; font-weight: 400; }

.hero-cta { display: flex; align-items: center; justify-content: center; gap: 16px; flex-wrap: wrap; }

.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--accent-indigo); color: #fff;
  padding: 16px 32px; border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 600; text-decoration: none;
  transition: all 0.25s; border: none; cursor: pointer;
  text-transform: uppercase; letter-spacing: 0.5px;
  font-family: 'Space Grotesk', sans-serif;
}

.btn-primary:hover { background: var(--accent-indigo-hover); transform: translateY(-1px); box-shadow: 0 8px 30px rgba(99,102,241,0.25); }

.btn-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  background: transparent; color: var(--text-primary);
  padding: 16px 28px; border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 500; text-decoration: none;
  border: 1px solid var(--border-medium); transition: all 0.25s;
  text-transform: uppercase; letter-spacing: 0.5px;
  font-family: 'Space Grotesk', sans-serif;
}

.btn-secondary:hover { border-color: var(--accent-cyan); color: var(--accent-cyan); }

/* ====== Metrics Bar ====== */
.metrics-bar { background: var(--bg-secondary); border-top: 1px solid var(--border-subtle); border-bottom: 1px solid var(--border-subtle); padding: 48px 24px; }

.metrics-inner { max-width: 1280px; margin: 0 auto; display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; text-align: center; }

.metric-value {
  font-family: 'Space Grotesk', sans-serif; font-size: 36px; font-weight: 800;
  background: linear-gradient(135deg, var(--accent-indigo), var(--accent-cyan));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  margin-bottom: 6px;
}

.metric-label { font-size: 12px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; font-weight: 500; }

/* ====== Breadcrumb ====== */
.breadcrumb-wrap { max-width: 1280px; margin: 0 auto; padding: 20px 24px; }

.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--text-muted); list-style: none; flex-wrap: wrap; }
.breadcrumb li { display: flex; align-items: center; gap: 8px; }
.breadcrumb a { color: var(--text-muted); text-decoration: none; transition: color 0.2s; }
.breadcrumb a:hover { color: var(--accent-cyan); }
.breadcrumb .sep { color: var(--border-medium); }
.breadcrumb .current { color: var(--text-secondary); }

/* ====== Section ====== */
.section { padding: 100px 24px; max-width: 1280px; margin: 0 auto; }
.section-header { max-width: 720px; margin-bottom: 60px; }

.section-tag { display: inline-block; font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 2px; color: var(--accent-indigo); margin-bottom: 16px; font-family: 'Space Grotesk', sans-serif; }

.section h2 { font-size: clamp(26px, 3.2vw, 38px); font-weight: 700; line-height: 1.25; letter-spacing: -0.5px; margin-bottom: 20px; }
.section h2 em { font-style: normal; color: var(--accent-cyan); }

.section-lead { font-size: 18px; color: var(--text-secondary); line-height: 1.9; }

/* ====== Bands ====== */
.band { padding: 100px 24px; }
.band-dark { background: var(--bg-primary); }
.band-darker { background: var(--bg-secondary); border-top: 1px solid var(--border-subtle); border-bottom: 1px solid var(--border-subtle); }
.band-inner { max-width: 1280px; margin: 0 auto; }

.band-split { display: grid; grid-template-columns: 55fr 45fr; gap: 64px; align-items: center; }
.band-split.right-wide { grid-template-columns: 45fr 55fr; }

.band-image { border-radius: var(--radius-md); overflow: hidden; aspect-ratio: 4 / 3; background: var(--bg-surface); }
.band-image img { width: 100%; height: 100%; object-fit: cover; display: block; }

.band-text h3 { font-size: 18px; font-weight: 700; margin-bottom: 16px; letter-spacing: 0.3px; }
.band-text p { font-size: 16px; color: var(--text-secondary); line-height: 1.9; margin-bottom: 16px; text-transform: none; }

.band-text .causal {
  display: block; margin-top: 20px; padding: 14px 18px;
  background: rgba(99,102,241,0.05);
  border-left: 2px solid var(--accent-indigo);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 14px; color: var(--text-muted); line-height: 1.7;
}

/* ====== Spec Strip ====== */
.spec-strip {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--border-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); overflow: hidden; margin-top: 40px;
}

.spec-cell { background: var(--bg-card); padding: 28px 24px; text-align: center; }
.spec-cell .label { font-size: 10px; text-transform: uppercase; letter-spacing: 1.5px; color: var(--text-muted); font-weight: 600; margin-bottom: 8px; }
.spec-cell .value { font-size: 14px; color: var(--text-primary); font-weight: 500; line-height: 1.5; }

/* ====== Product Cards ====== */
.product-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 40px; }

.product-card { background: var(--bg-card); border: 1px solid var(--border-subtle); border-radius: var(--radius-md); overflow: hidden; transition: all 0.3s; }
.product-card:hover { border-color: rgba(99,102,241,0.2); transform: translateY(-3px); box-shadow: 0 12px 40px rgba(99,102,241,0.08); }
.product-card img { width: 100%; aspect-ratio: 1; object-fit: cover; display: block; }

.product-info { padding: 18px; }
.product-info h3 { font-size: 14px; font-weight: 600; margin-bottom: 6px; letter-spacing: 0.2px; }
.product-info p { font-size: 13px; color: var(--text-muted); line-height: 1.6; margin-bottom: 12px; text-transform: none; }

.product-info .plink { display: inline-block; font-size: 12px; font-weight: 600; color: var(--accent-cyan); text-decoration: none; text-transform: uppercase; letter-spacing: 0.5px; font-family: 'Space Grotesk', sans-serif; }
.product-info .plink:hover { color: var(--accent-cyan-hover); }
.product-info .pnote { display: block; font-size: 11px; color: var(--text-muted); line-height: 1.5; margin-top: 6px; }

/* ====== Gallery ====== */
.gallery-strip { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 48px; }

.gallery-item { position: relative; border-radius: var(--radius-md); overflow: hidden; aspect-ratio: 16 / 10; background: var(--bg-surface); }
.gallery-item img { width: 100%; height: 100%; object-fit: cover; display: block; }

.gallery-caption { position: absolute; bottom: 0; left: 0; right: 0; padding: 40px 20px 16px; background: linear-gradient(transparent, rgba(0,0,0,0.85)); }
.gallery-caption p { font-size: 14px; font-weight: 500; color: var(--text-primary); text-transform: none; font-family: 'Inter', sans-serif; }
.gallery-caption span { display: block; font-size: 13px; color: var(--text-muted); margin-top: 2px; }

/* ====== Accordion ====== */
.accordion-wrap { max-width: 800px; margin: 0 auto; }
.accordion-item { border-bottom: 1px solid var(--border-subtle); padding: 20px 0; }

.accordion-header {
  width: 100%; display: flex; justify-content: space-between; align-items: center;
  background: none; border: none; color: var(--text-primary); font-size: 16px; font-weight: 500;
  cursor: pointer; padding: 4px 0; text-align: left; gap: 16px;
  font-family: 'Space Grotesk', sans-serif; text-transform: none;
}

.accordion-header::after { content: "+"; font-size: 22px; color: var(--text-muted); flex-shrink: 0; transition: transform 0.3s; }
.accordion-item.open .accordion-header::after { transform: rotate(45deg); }

.accordion-body { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease; padding: 0 32px 0 0; }
.accordion-item.open .accordion-body { max-height: 500px; padding-top: 14px; }
.accordion-body p { font-size: 15px; color: var(--text-secondary); line-height: 1.8; }

/* ====== FAQ ====== */
.faq-list { max-width: 800px; }
.faq-item { border-bottom: 1px solid var(--border-subtle); padding: 20px 0; }

.faq-question {
  width: 100%; display: flex; justify-content: space-between; align-items: center;
  background: none; border: none; color: var(--text-primary); font-size: 17px; font-weight: 500;
  cursor: pointer; padding: 4px 0; text-align: left; gap: 16px;
  font-family: 'Space Grotesk', sans-serif; text-transform: none;
}

.faq-question::after { content: "+"; font-size: 20px; color: var(--text-muted); flex-shrink: 0; transition: transform 0.3s; }
.faq-item.open .faq-question::after { transform: rotate(45deg); }

.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease; padding: 0 32px 0 0; }
.faq-item.open .faq-answer { max-height: 600px; padding-top: 16px; }
.faq-answer p { font-size: 16px; color: var(--text-secondary); line-height: 1.9; }

/* ====== Form ====== */
.stat-card { background: rgba(255, 255, 255, 0.02); backdrop-filter: blur(8px); border: 1px solid rgba(255, 255, 255, 0.04); }
.border-glow { border: 1px solid rgba(99, 102, 241, 0.15); transition: border-color 0.4s ease; }
.border-glow:hover { border-color: rgba(99, 102, 241, 0.4); }

.text-gradient { background: linear-gradient(135deg, #a5b4fc, #06b6d4); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

#hubspot-form-container .hs-form { display: flex; flex-direction: column; gap: 1.2rem; }
#hubspot-form-container .hs-form label { color: #94a3b8; font-size: 0.85rem; font-weight: 500; letter-spacing: 0.02em; }
#hubspot-form-container .hs-form input,
#hubspot-form-container .hs-form textarea,
#hubspot-form-container .hs-form select { background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.08); border-radius: 12px; padding: 0.9rem 1.2rem; color: #f1f5f9; font-size: 0.95rem; width: 100% !important; outline: none; transition: border 0.25s ease; }
#hubspot-form-container .hs-form input:focus,
#hubspot-form-container .hs-form textarea:focus,
#hubspot-form-container .hs-form select:focus { border-color: #6366f1; box-shadow: 0 0 0 3px rgba(99,102,241,0.15); }
#hubspot-form-container .hs-form .hs-button { background: #6366f1; border: none; border-radius: 40px; padding: 1rem 2.4rem; font-weight: 600; color: white; font-size: 1rem; cursor: pointer; transition: all 0.3s ease; width: auto; align-self: flex-start; }
#hubspot-form-container .hs-form .hs-button:hover { background: #4f46e5; box-shadow: 0 0 40px rgba(99,102,241,0.25); transform: scale(1.02); }
#hubspot-form-container .hs-form .hs-error-msgs { color: #f87171; font-size: 0.75rem; list-style: none; padding: 0; margin: 0.25rem 0 0 0; }
#hubspot-form-container .hs-form .hs-error-msgs li { padding-left: 0; }
#hubspot-form-container .hs-form .legal-consent-container { font-size: 0.75rem; color: #64748b; line-height: 1.5; }
#hubspot-form-container .hs-form .legal-consent-container a { color: #818cf8; text-decoration: underline; }

.form-section { padding: 100px 24px; position: relative; }
.form-section::before { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(99,102,241,0.06), transparent); pointer-events: none; }
.form-inner-wrap { max-width: 800px; margin: 0 auto; position: relative; z-index: 1; }
.form-header { text-align: center; margin-bottom: 48px; }
.form-header h2 { font-size: clamp(26px, 3vw, 36px); font-weight: 700; margin-bottom: 16px; }
.form-header p { color: var(--text-secondary); font-size: 17px; line-height: 1.8; max-width: 600px; margin: 0 auto; }

/* ====== Footer ====== */
.footer { border-top: 1px solid rgba(255,255,255,0.05); background: #000; }

.footer-inner { max-width: 1280px; margin: 0 auto; padding: 96px 24px 0; display: grid; grid-template-columns: 1fr 1fr; gap: 64px; text-align: left; }

.footer h5 { color: #fff; font-weight: 700; margin-bottom: 32px; letter-spacing: 0.3em; text-transform: uppercase; font-size: 11px; }
.footer p { text-transform: none; font-family: 'Inter', sans-serif; }

.footer-address p { color: var(--text-muted); font-size: 15px; line-height: 1.8; font-weight: 300; }
.footer-contact { text-align: left; }
.footer-contact p { color: var(--text-secondary); font-size: 15px; margin-bottom: 16px; }
.footer-contact a { color: #fff; text-decoration: none; transition: color 0.2s; font-weight: 700; letter-spacing: 0.5px; }
.footer-contact a:hover { color: var(--accent-indigo); }
.footer-contact .label { color: var(--text-muted); font-weight: 400; margin-right: 8px; }

.footer-bottom { max-width: 1280px; margin: 96px auto 0; padding: 48px 24px; text-align: center; border-top: 1px solid rgba(255,255,255,0.05); font-size: 8px; text-transform: uppercase; letter-spacing: 0.8em; color: rgba(255,255,255,0.04); }

/* ====== WhatsApp ====== */
.whatsapp-float { position: fixed; bottom: 24px; right: 24px; z-index: 999; width: 56px; height: 56px; background: #25D366; border-radius: 50%; display: flex; align-items: center; justify-content: center; box-shadow: 0 4px 20px rgba(37, 211, 102, 0.3); transition: all 0.3s; text-decoration: none; }
.whatsapp-float:hover { transform: scale(1.1); box-shadow: 0 8px 30px rgba(37, 211, 102, 0.4); }
.whatsapp-float svg { width: 28px; height: 28px; fill: #fff; }

/* ====== Responsive ====== */
@media (max-width: 1024px) {
  .metrics-inner { grid-template-columns: repeat(2, 1fr); }
  .product-strip { grid-template-columns: repeat(2, 1fr); }
  .spec-strip { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .mobile-toggle { display: flex; }

  .nav-links.active {
    display: flex; flex-direction: column; position: absolute; top: 56px; left: 0; right: 0;
    background: rgba(0,0,0,0.95); backdrop-filter: blur(20px); padding: 24px; gap: 20px;
    align-items: center; border-radius: 20px; border: 1px solid var(--border-subtle);
  }

  .nav-bg { border-radius: 40px; padding: 0.5rem 1.2rem; }
  .hero { min-height: 90vh; padding: 120px 20px 60px; }
  .band-split { grid-template-columns: 1fr; gap: 24px; }
  .band-split.right-wide { grid-template-columns: 1fr; }
  .band { padding: 60px 20px; }
  .metrics-inner { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .product-strip { grid-template-columns: 1fr 1fr; gap: 12px; }
  .spec-strip { grid-template-columns: 1fr 1fr; }
  .gallery-strip { grid-template-columns: 1fr; }
  .section { padding: 60px 20px; }
  .form-section { padding: 60px 20px; }
  .footer-inner { grid-template-columns: 1fr; gap: 40px; }
  .footer-bottom { margin-top: 48px; padding: 32px 20px; }
}

@media (max-width: 480px) {
  .product-strip { grid-template-columns: 1fr; }
  .spec-strip { grid-template-columns: 1fr; }
  .hero h1 { font-size: 26px; }
  .hero-cta { flex-direction: column; }
  .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
}