/* ============================================================
   style.css — LED Light Bracelet Landing Page
   Tailwind 工具类静态化 + 原内联自定义样式合并
   ============================================================ */

/* ── Tailwind Preflight Reset ── */
*,
::before,
::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  border-width: 0;
  border-style: solid;
  border-color: #e5e7eb;
}
html {
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
  -moz-tab-size: 4;
  tab-size: 4;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  font-feature-settings: normal;
  font-variation-settings: normal;
}
body {
  line-height: inherit;
}
hr {
  height: 0;
  color: inherit;
  border-top-width: 1px;
}
abbr:where([title]) {
  text-decoration: underline dotted;
}
h1, h2, h3, h4, h5, h6 {
  font-size: inherit;
  font-weight: inherit;
}
a {
  color: inherit;
  text-decoration: inherit;
}
b, strong {
  font-weight: 700;
}
code, kbd, samp, pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 1em;
}
small {
  font-size: 80%;
}
sub, sup {
  font-size: 75%;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
}
sub {
  bottom: -0.25em;
}
sup {
  top: -0.5em;
}
table {
  text-indent: 0;
  border-color: inherit;
  border-collapse: collapse;
}
button, input, optgroup, select, textarea {
  font-family: inherit;
  font-feature-settings: inherit;
  font-variation-settings: inherit;
  font-size: 100%;
  font-weight: inherit;
  line-height: inherit;
  color: inherit;
  margin: 0;
  padding: 0;
}
button, select {
  text-transform: none;
}
::-webkit-inner-spin-button,
::-webkit-outer-spin-button {
  height: auto;
}
::-webkit-search-decoration {
  -webkit-appearance: none;
}
::-webkit-file-upload-button {
  -webkit-appearance: button;
  font: inherit;
}
img, svg, video, canvas, audio, iframe, embed, object {
  display: block;
  vertical-align: middle;
}
img, video {
  max-width: 100%;
  height: auto;
}
[hidden] {
  display: none;
}

/* ── 原内联自定义样式 ── */
body {
  font-family: 'Inter', sans-serif;
  background: #000;
  color: #fff;
  scroll-behavior: smooth;
  overflow-x: hidden;
}
h1,
h2,
h3 {
  font-family: 'Space Grotesk', sans-serif;
  text-transform: uppercase;
}
.nav-bg {
  background: rgba(10, 10, 10, 0.75);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 60px;
  padding: 0.6rem 2rem;
}
@media (max-width: 768px) {
  .nav-bg {
    border-radius: 40px;
    padding: 0.5rem 1.2rem;
  }
}
.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;
}
.hero-overlay {
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.30) 0%, rgba(0, 0, 0, 0.85) 100%);
}
.glow-indigo {
  box-shadow: 0 0 60px rgba(99, 102, 241, 0.15);
}
.glow-cyan {
  box-shadow: 0 0 60px rgba(6, 182, 212, 0.10);
}
.product-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: 24px;
  transition: all 0.4s ease;
}
.product-card:hover {
  border-color: rgba(99, 102, 241, 0.25);
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(99, 102, 241, 0.08);
}
.breadcrumb a {
  color: rgba(255, 255, 255, 0.4);
  transition: color 0.2s;
}
.breadcrumb a:hover {
  color: #a5b4fc;
}
.faq-item {
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  padding: 1.5rem 0;
}
.faq-item summary {
  font-weight: 500;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::after {
  content: "+";
  font-size: 1.5rem;
  color: #6366f1;
  transition: transform 0.3s;
}
.faq-item[open] summary::after {
  content: "−";
  transform: rotate(180deg);
}
.spec-table td {
  padding: 1rem 0.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  font-size: 0.9rem;
}
.spec-table td:first-child {
  color: rgba(255, 255, 255, 0.5);
  font-weight: 300;
  width: 40%;
}
.spec-table td:last-child {
  color: #f1f5f9;
  font-weight: 400;
}
#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;
}
@media (max-width: 640px) {
  .hero-title {
    font-size: 2.4rem !important;
  }
  .section-title {
    font-size: 1.8rem !important;
  }
}

/* ============================================================
   Tailwind 工具类 — 本页实际使用的全部类
   ============================================================ */

/* ── Layout ── */
.fixed { position: fixed; }
.absolute { position: absolute; }
.relative { position: relative; }
.sticky { position: sticky; }
.inset-0 { top: 0; right: 0; bottom: 0; left: 0; }
.top-6 { top: 1.5rem; }
.top-1\/4 { top: 25%; }
.top-1\/3 { top: 33.333333%; }
.top-1\/2 { top: 50%; }
.bottom-1\/4 { bottom: 25%; }
.bottom-8 { bottom: 2rem; }
.left-0 { left: 0; }
.left-6 { left: 1.5rem; }
.left-1\/4 { left: 25%; }
.right-0 { right: 0; }
.right-6 { right: 1.5rem; }
.right-1\/4 { right: 25%; }
.right-8 { right: 2rem; }
.z-10 { z-index: 10; }
.z-50 { z-index: 50; }
.z-\[100\] { z-index: 100; }

/* ── Display ── */
.block { display: block; }
.inline-block { display: inline-block; }
.flex { display: flex; }
.grid { display: grid; }
.hidden { display: none; }
.table { display: table; }

/* ── Flexbox ── */
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.flex-1 { flex: 1 1 0%; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }
.gap-8 { gap: 2rem; }
.gap-12 { gap: 3rem; }
.gap-16 { gap: 4rem; }
.space-y-0 > :not([hidden]) ~ :not([hidden]) { margin-top: 0; }
.space-y-4 > :not([hidden]) ~ :not([hidden]) { margin-top: 1rem; }
.space-y-12 > :not([hidden]) ~ :not([hidden]) { margin-top: 3rem; }

/* ── Grid ── */
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* ── Sizing ── */
.w-full { width: 100%; }
.w-auto { width: auto; }
.w-8 { width: 2rem; }
.w-12 { width: 3rem; }
.w-16 { width: 4rem; }
.w-48 { width: 12rem; }
.w-64 { width: 16rem; }
.w-72 { width: 18rem; }
.w-80 { width: 20rem; }
.w-96 { width: 24rem; }
.h-8 { height: 2rem; }
.h-10 { height: 2.5rem; }
.h-12 { height: 3rem; }
.h-16 { height: 4rem; }
.h-48 { height: 12rem; }
.h-64 { height: 16rem; }
.h-80 { height: 20rem; }
.h-auto { height: auto; }
.h-full { height: 100%; }
.min-h-screen { min-height: 100vh; }
.max-w-2xl { max-width: 42rem; }
.max-w-3xl { max-width: 48rem; }
.max-w-4xl { max-width: 56rem; }
.max-w-5xl { max-width: 64rem; }
.max-w-7xl { max-width: 80rem; }

/* ── Padding ── */
.p-4 { padding: 1rem; }
.p-6 { padding: 1.5rem; }
.p-8 { padding: 2rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }
.px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }
.px-10 { padding-left: 2.5rem; padding-right: 2.5rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-4 { padding-top: 1rem; padding-bottom: 1rem; }
.py-16 { padding-top: 4rem; padding-bottom: 4rem; }
.py-20 { padding-top: 5rem; padding-bottom: 5rem; }
.py-24 { padding-top: 6rem; padding-bottom: 6rem; }
.py-28 { padding-top: 7rem; padding-bottom: 7rem; }
.py-32 { padding-top: 8rem; padding-bottom: 8rem; }
.pt-8 { padding-top: 2rem; }
.pt-12 { padding-top: 3rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mt-8 { margin-top: 2rem; }
.mt-10 { margin-top: 2.5rem; }
.mt-20 { margin-top: 5rem; }
.mt-24 { margin-top: 6rem; }
.mt-32 { margin-top: 8rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.mb-14 { margin-bottom: 3.5rem; }
.mb-16 { margin-bottom: 4rem; }
.mb-20 { margin-bottom: 5rem; }
.mr-2 { margin-right: 0.5rem; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* ── Typography ── */
.text-\[8px\] { font-size: 8px; }
.text-\[9px\] { font-size: 9px; }
.text-xs { font-size: 0.75rem; line-height: 1rem; }
.text-sm { font-size: 0.875rem; line-height: 1.25rem; }
.text-base { font-size: 1rem; line-height: 1.5rem; }
.text-lg { font-size: 1.125rem; line-height: 1.75rem; }
.text-xl { font-size: 1.25rem; line-height: 1.75rem; }
.text-2xl { font-size: 1.5rem; line-height: 2rem; }
.text-3xl { font-size: 1.875rem; line-height: 2.25rem; }
.text-4xl { font-size: 2.25rem; line-height: 2.5rem; }
.text-5xl { font-size: 3rem; line-height: 1; }
.text-7xl { font-size: 4.5rem; line-height: 1; }
.text-8xl { font-size: 6rem; line-height: 1; }
.font-light { font-weight: 300; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.font-\[Space\+Grotesk\] { font-family: 'Space Grotesk', sans-serif; }
.uppercase { text-transform: uppercase; }
.tracking-tight { letter-spacing: -0.025em; }
.tracking-wider { letter-spacing: 0.05em; }
.tracking-widest { letter-spacing: 0.1em; }
.tracking-\[0\.15em\] { letter-spacing: 0.15em; }
.tracking-\[0\.3em\] { letter-spacing: 0.3em; }
.tracking-\[0\.4em\] { letter-spacing: 0.4em; }
.tracking-\[0\.5em\] { letter-spacing: 0.5em; }
.tracking-\[0\.8em\] { letter-spacing: 0.8em; }
.leading-tight { line-height: 1.25; }
.leading-relaxed { line-height: 1.625; }
.leading-\[1\.1\] { line-height: 1.1; }
.text-left { text-align: left; }
.text-center { text-align: center; }

/* ── Colors ── */
.text-white { color: #ffffff; }
.text-white\/90 { color: rgba(255, 255, 255, 0.9); }
.text-white\/80 { color: rgba(255, 255, 255, 0.8); }
.text-white\/70 { color: rgba(255, 255, 255, 0.7); }
.text-white\/30 { color: rgba(255, 255, 255, 0.3); }
.text-white\/10 { color: rgba(255, 255, 255, 0.1); }
.text-slate-300 { color: #cbd5e1; }
.text-slate-400 { color: #94a3b8; }
.text-slate-500 { color: #64748b; }
.text-slate-600 { color: #475569; }
.text-slate-800 { color: #1e293b; }
.text-indigo-300 { color: #a5b4fc; }
.text-indigo-400 { color: #818cf8; }
.text-indigo-500 { color: #6366f1; }
.text-cyan-400 { color: #22d3ee; }

.bg-black { background-color: #000000; }
.bg-white\/5 { background-color: rgba(255, 255, 255, 0.05); }
.bg-white\/\[0\.01\] { background-color: rgba(255, 255, 255, 0.01); }
.bg-indigo-500 { background-color: #6366f1; }
.bg-indigo-500\/10 { background-color: rgba(99, 102, 241, 0.1); }
.bg-indigo-500\/5 { background-color: rgba(99, 102, 241, 0.05); }
.bg-indigo-600 { background-color: #4f46e5; }
.bg-indigo-950\/10 { background-color: rgba(30, 27, 75, 0.1); }
.bg-cyan-500\/8 { background-color: rgba(6, 182, 212, 0.08); }
.bg-cyan-500\/10 { background-color: rgba(6, 182, 212, 0.1); }
.bg-cyan-500\/5 { background-color: rgba(6, 182, 212, 0.05); }
.bg-\[\#25D366\] { background-color: #25D366; }

/* ── Background ── */
.bg-cover { background-size: cover; }
.bg-center { background-position: center; }
.bg-no-repeat { background-repeat: no-repeat; }
.bg-gradient-to-t { background-image: linear-gradient(to top, var(--tw-gradient-stops)); }
.from-indigo-950\/10 { --tw-gradient-from: rgba(30, 27, 75, 0.1); --tw-gradient-to: rgba(30, 27, 75, 0); --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to); }
.to-transparent { --tw-gradient-to: transparent; }

/* ── Borders ── */
.border { border-width: 1px; }
.border-t { border-top-width: 1px; }
.border-white\/5 { border-color: rgba(255, 255, 255, 0.05); }
.border-white\/10 { border-color: rgba(255, 255, 255, 0.1); }
.border-indigo-500\/20 { border-color: rgba(99, 102, 241, 0.2); }
.border-cyan-500\/20 { border-color: rgba(6, 182, 212, 0.2); }

/* ── Border Radius ── */
.rounded-full { border-radius: 9999px; }
.rounded-xl { border-radius: 0.75rem; }
.rounded-2xl { border-radius: 1rem; }

/* ── Effects ── */
.shadow-2xl { box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25); }
.shadow-lg { box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1); }
.blur-\[80px\] { filter: blur(80px); }
.blur-\[100px\] { filter: blur(100px); }
.blur-\[120px\] { filter: blur(120px); }

/* ── Transitions & Animations ── */
.transition { transition-property: color, background-color, border-color, text-decoration-color, fill, stroke, opacity, box-shadow, transform, filter, backdrop-filter; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); transition-duration: 150ms; }
.transition-all { transition-property: all; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); transition-duration: 150ms; }
.duration-300 { transition-duration: 300ms; }

/* ── Hover States ── */
.hover\:bg-indigo-500:hover { background-color: #6366f1; }
.hover\:text-indigo-300:hover { color: #a5b4fc; }
.hover\:text-indigo-400:hover { color: #818cf8; }
.hover\:text-white:hover { color: #ffffff; }
.hover\:border-indigo-400\/40:hover { border-color: rgba(129, 140, 248, 0.4); }
.hover\:scale-110:hover { transform: scale(1.1); }

/* ── Miscellaneous ── */
.overflow-hidden { overflow: hidden; }
.overflow-x-auto { overflow-x: auto; }
.pointer-events-none { pointer-events: none; }
.object-cover { object-fit: cover; }
.aspect-square { aspect-ratio: 1 / 1; }
.cursor-pointer { cursor: pointer; }
.list-style-none { list-style: none; }

/* ── Responsive: md (768px+) ── */
@media (min-width: 768px) {
  .md\:flex { display: flex; }
  .md\:grid { display: grid; }
  .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .md\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .md\:h-10 { height: 2.5rem; }
  .md\:h-64 { height: 16rem; }
  .md\:text-right { text-align: right; }
  .md\:text-lg { font-size: 1.125rem; line-height: 1.75rem; }
  .md\:text-2xl { font-size: 1.5rem; line-height: 2rem; }
  .md\:text-4xl { font-size: 2.25rem; line-height: 2.5rem; }
  .md\:text-5xl { font-size: 3rem; line-height: 1; }
  .md\:text-7xl { font-size: 4.5rem; line-height: 1; }
  .md\:text-8xl { font-size: 6rem; line-height: 1; }
  .md\:py-32 { padding-top: 8rem; padding-bottom: 8rem; }
  .md\:p-12 { padding: 3rem; }
  .md\:gap-8 { gap: 2rem; }
  .md\:inline { display: inline; }
  .md\:inline-block { display: inline-block; }
}

/* ── Responsive: lg (1024px+) ── */
@media (min-width: 1024px) {
  .lg\:text-8xl { font-size: 6rem; line-height: 1; }
}