:root {
  --bg: #fbf8f1;
  --surface: rgba(255,255,255,.82);
  --surface-solid: #fffdf8;
  --ink: #211d18;
  --muted: #706a60;
  --line: rgba(33,29,24,.12);
  --brand: #f2ae35;
  --brand-dark: #956919;
  --soft: #f7e5bf;
  --shadow: 0 26px 80px rgba(31,24,12,.10);
  --radius-xl: 34px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --container: min(1180px, calc(100% - 40px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 8%, rgba(242,174,53,.20), transparent 30%),
    radial-gradient(circle at 92% 12%, rgba(149,105,25,.10), transparent 28%),
    linear-gradient(180deg, #fbf8f1 0%, #fffdf8 52%, #f7f0e2 100%);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea, select { font: inherit; }
button { cursor: pointer; }
::selection { background: rgba(242,174,53,.35); }
.container { width: var(--container); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  padding: 14px 0 12px;
  background: rgba(251,248,241,.82);
  backdrop-filter: blur(22px);
  border-bottom: 1px solid var(--line);
}
.nav-shell, .search-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav-shell { min-height: 54px; }
.brand-logo { display: inline-flex; align-items: center; gap: 12px; font-weight: 800; letter-spacing: -.02em; }
.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 16px;
  display: inline-grid;
  place-items: center;
  background: linear-gradient(135deg, #f8cd72, #f2ae35 54%, #d58b18);
  box-shadow: 0 14px 34px rgba(242,174,53,.32);
  position: relative;
  overflow: hidden;
}
.brand-mark::before {
  content: "";
  position: absolute;
  width: 26px;
  height: 56px;
  border-radius: 999px;
  border: 7px solid rgba(33,29,24,.72);
  border-left-color: transparent;
  transform: rotate(18deg) translateX(-1px);
}
.play-dot {
  width: 0;
  height: 0;
  border-left: 10px solid #fffdf8;
  border-top: 7px solid transparent;
  border-bottom: 7px solid transparent;
  transform: translateX(2px);
  z-index: 1;
}
.brand-text { font-size: 20px; }
.main-nav { display: flex; gap: 4px; align-items: center; }
.main-nav a, .mobile-panel a {
  color: var(--muted);
  padding: 10px 13px;
  border-radius: 999px;
  transition: background .2s ease, color .2s ease, transform .2s ease;
}
.main-nav a:hover, .mobile-panel a:hover { color: var(--ink); background: rgba(255,255,255,.72); transform: translateY(-1px); }
.nav-cta, .btn-primary, .btn-secondary, .search-box button, .form-card button {
  border: 0;
  border-radius: 999px;
  background: var(--ink);
  color: #fffdf8;
  padding: 12px 20px;
  box-shadow: 0 16px 34px rgba(33,29,24,.14);
  transition: transform .22s ease, box-shadow .22s ease, background .22s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.nav-cta:hover, .btn-primary:hover, .btn-secondary:hover, .search-box button:hover, .form-card button:hover { transform: translateY(-2px); box-shadow: 0 22px 42px rgba(33,29,24,.18); }
.btn-secondary { color: var(--ink); background: rgba(255,255,255,.76); border: 1px solid var(--line); }
.menu-toggle { display: none; border: 0; background: rgba(255,255,255,.8); border-radius: 14px; width: 44px; height: 44px; padding: 11px; }
.menu-toggle span { display: block; height: 2px; background: var(--ink); margin: 6px 0; border-radius: 999px; }
.mobile-panel { display: none; padding-top: 12px; }
.search-strip { margin-top: 10px; }
.search-box {
  flex: 1;
  min-width: 240px;
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,.74);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px;
  box-shadow: 0 12px 34px rgba(33,29,24,.05);
}
.search-box input {
  width: 100%;
  min-width: 0;
  border: 0;
  outline: 0;
  padding: 10px 14px;
  background: transparent;
  color: var(--ink);
}
.domain-note { margin: 0; color: var(--muted); font-size: 14px; white-space: nowrap; }
.search-toast {
  position: fixed;
  left: 50%;
  top: 110px;
  transform: translateX(-50%) translateY(-12px);
  background: rgba(33,29,24,.92);
  color: #fffdf8;
  padding: 11px 16px;
  border-radius: 999px;
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s ease, transform .25s ease;
}
.search-toast.is-visible { opacity: 1; transform: translateX(-50%) translateY(0); }

.hero {
  min-height: calc(100vh - 122px);
  display: grid;
  align-items: center;
  padding: clamp(58px, 8vw, 112px) 0 76px;
}
.hero-grid, .split-grid, .contact-grid, .page-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, .95fr);
  gap: clamp(34px, 6vw, 72px);
  align-items: center;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--brand-dark);
  background: rgba(242,174,53,.16);
  border: 1px solid rgba(242,174,53,.22);
  border-radius: 999px;
  padding: 6px 12px;
  font-weight: 700;
  margin-bottom: 20px;
}
.eyebrow::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--brand); box-shadow: 0 0 0 6px rgba(242,174,53,.16); }
h1, h2, h3 { margin: 0; line-height: 1.13; letter-spacing: -.045em; }
h1 { font-size: clamp(44px, 8vw, 88px); max-width: 900px; }
h2 { font-size: clamp(30px, 4.7vw, 56px); }
h3 { font-size: clamp(21px, 2.2vw, 28px); }
p { margin: 0; }
.lead { color: var(--muted); font-size: clamp(17px, 2vw, 21px); max-width: 690px; margin-top: 24px; }
.hero-actions, .section-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 34px; }
.hero-metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 44px; max-width: 690px; }
.metric-card, .stat-card, .feature-card, .video-card, .review-card, .faq-item, .form-card, .panel-card, .timeline-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: 0 18px 60px rgba(33,29,24,.07);
}
.metric-card { padding: 22px; }
.metric-card strong { display: block; font-size: 28px; line-height: 1; }
.metric-card span { color: var(--muted); font-size: 14px; }
.hero-media, .image-frame {
  border-radius: var(--radius-xl);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow);
  background: var(--surface-solid);
  border: 1px solid rgba(255,255,255,.82);
}
.hero-media img, .image-frame img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.hero-media::after, .image-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 58%, rgba(33,29,24,.58));
  pointer-events: none;
}
.media-caption {
  position: absolute;
  left: 22px;
  right: 22px;
  bottom: 20px;
  color: #fffdf8;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: end;
  font-size: 14px;
}
.media-caption strong { display: block; font-size: 18px; }
.media-caption span { opacity: .82; }
.section { padding: clamp(70px, 10vw, 130px) 0; }
.section-header { display: flex; justify-content: space-between; gap: 28px; align-items: end; margin-bottom: 34px; }
.section-header p { color: var(--muted); max-width: 540px; }
.soft-panel {
  padding: clamp(28px, 5vw, 58px);
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, rgba(255,255,255,.78), rgba(247,229,191,.48));
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.split-grid .lead { margin-top: 18px; }
.pill-list { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.pill-list span, .tag, .video-tags span {
  display: inline-flex;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.72);
  color: var(--muted);
  border-radius: 999px;
  padding: 7px 12px;
  font-size: 14px;
}
.feature-grid, .video-grid, .review-grid, .inner-grid, .stats-grid, .case-grid {
  display: grid;
  gap: 18px;
}
.feature-grid { grid-template-columns: repeat(4, 1fr); }
.video-grid, .case-grid { grid-template-columns: repeat(4, 1fr); }
.review-grid, .inner-grid { grid-template-columns: repeat(3, 1fr); }
.stats-grid { grid-template-columns: repeat(4, 1fr); }
.feature-card, .review-card, .faq-item, .panel-card, .timeline-item { padding: 24px; }
.feature-card { min-height: 250px; transition: transform .25s ease, box-shadow .25s ease; }
.feature-card:hover, .video-card:hover, .review-card:hover, .panel-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 16px;
  background: rgba(242,174,53,.16);
  display: grid;
  place-items: center;
  color: var(--brand-dark);
  margin-bottom: 22px;
  font-weight: 900;
}
.feature-card p, .review-card p, .panel-card p, .timeline-item p { color: var(--muted); margin-top: 12px; }
.video-card { overflow: hidden; transition: transform .25s ease, box-shadow .25s ease; }
.video-cover { position: relative; overflow: hidden; background: #f7f0e2; }
.video-cover img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; transition: transform .5s ease, filter .3s ease; }
.video-card:hover .video-cover img { transform: scale(1.045); filter: saturate(1.05); }
.play-button {
  position: absolute;
  inset: 50% auto auto 50%;
  transform: translate(-50%, -50%) scale(.86);
  width: 62px;
  height: 62px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,.70);
  background: rgba(33,29,24,.72);
  backdrop-filter: blur(12px);
  opacity: 0;
  transition: opacity .25s ease, transform .25s ease;
  display: grid;
  place-items: center;
}
.play-button::before {
  content: "";
  width: 0;
  height: 0;
  border-left: 16px solid #fffdf8;
  border-top: 11px solid transparent;
  border-bottom: 11px solid transparent;
  margin-left: 4px;
}
.video-card:hover .play-button, .video-card.is-preview .play-button { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.video-body { padding: 20px; }
.video-body h3 { font-size: 22px; }
.video-body p { color: var(--muted); margin-top: 10px; }
.video-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.video-meta { display: flex; flex-wrap: wrap; gap: 12px; color: var(--muted); font-size: 13px; margin-top: 18px; }
.stat-card { padding: 28px; text-align: center; }
.stat-card strong { display: block; font-size: clamp(32px, 4vw, 48px); line-height: 1; }
.stat-card span { color: var(--muted); }
.review-card blockquote { margin: 0; color: var(--ink); }
.review-author { display: flex; justify-content: space-between; gap: 12px; align-items: end; margin-top: 22px; color: var(--muted); }
.review-author strong { color: var(--ink); display: block; }
.stars { color: var(--brand-dark); font-weight: 800; }
.faq-list { display: grid; gap: 14px; max-width: 920px; margin-inline: auto; }
.faq-item { padding: 0; overflow: hidden; }
.faq-item summary { list-style: none; cursor: pointer; padding: 22px 26px; font-weight: 800; display: flex; justify-content: space-between; gap: 18px; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; color: var(--brand-dark); font-size: 24px; line-height: 1; }
.faq-item[open] summary::after { content: "–"; }
.faq-item p { color: var(--muted); padding: 0 26px 24px; }
.contact-grid { grid-template-columns: .9fr 1.1fr; }
.form-card { padding: clamp(26px, 4vw, 40px); }
.form-card form { display: grid; gap: 14px; }
.form-card input, .form-card textarea, .form-card select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255,255,255,.72);
  padding: 14px 16px;
  color: var(--ink);
  outline: 0;
  transition: border .2s ease, box-shadow .2s ease;
}
.form-card input:focus, .form-card textarea:focus, .form-card select:focus { border-color: rgba(242,174,53,.62); box-shadow: 0 0 0 4px rgba(242,174,53,.16); }
.form-card textarea { min-height: 130px; resize: vertical; }
.info-list { display: grid; gap: 14px; margin-top: 26px; }
.info-list div { padding: 16px 18px; border-radius: 18px; background: rgba(255,255,255,.66); border: 1px solid var(--line); }
.info-list strong { display: block; }
.info-list span { color: var(--muted); }
.site-footer { padding: 64px 0 28px; background: rgba(33,29,24,.94); color: #fffdf8; }
.footer-grid { display: grid; grid-template-columns: 1.15fr .7fr .7fr .9fr; gap: 36px; align-items: start; }
.footer-summary, .footer-domain, .footer-links a, .footer-bottom, .site-footer h2 { color: rgba(255,253,248,.72); }
.footer-logo { margin-bottom: 18px; }
.site-footer h2 { font-size: 16px; letter-spacing: 0; margin-bottom: 14px; }
.footer-links { display: grid; gap: 8px; }
.footer-links a:hover { color: #fffdf8; }
.share-buttons { display: flex; gap: 8px; flex-wrap: wrap; }
.share-buttons button {
  border: 1px solid rgba(255,255,255,.16);
  background: rgba(255,255,255,.08);
  color: #fffdf8;
  border-radius: 999px;
  padding: 8px 12px;
}
.share-buttons button:hover { background: rgba(255,255,255,.16); }
.footer-bottom { display: flex; justify-content: space-between; gap: 18px; margin-top: 42px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.12); font-size: 14px; }

.page-hero { padding: clamp(54px, 8vw, 96px) 0 56px; }
.page-hero-grid { grid-template-columns: 1fr .72fr; }
.breadcrumb { color: var(--muted); margin-bottom: 18px; }
.breadcrumb a { color: var(--brand-dark); }
.page-card { padding: clamp(26px, 5vw, 48px); border-radius: var(--radius-xl); background: rgba(255,255,255,.76); border: 1px solid var(--line); box-shadow: var(--shadow); }
.article-content { max-width: 920px; margin-inline: auto; }
.article-content h2 { margin-top: 42px; font-size: clamp(26px, 3.4vw, 42px); }
.article-content p { margin-top: 14px; color: var(--muted); }
.timeline { display: grid; gap: 18px; margin-top: 28px; }
.download-card { display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: center; padding: 28px; border-radius: var(--radius-xl); background: linear-gradient(135deg, rgba(255,255,255,.84), rgba(242,174,53,.18)); border: 1px solid var(--line); }
.notice { font-size: 14px; color: var(--muted); margin-top: 12px; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; transition-duration: .01ms !important; }
}

@media (max-width: 1040px) {
  .main-nav, .nav-cta { display: none; }
  .menu-toggle { display: block; }
  .mobile-panel.is-open { display: grid; gap: 6px; }
  .feature-grid, .video-grid, .case-grid, .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .review-grid, .inner-grid, .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-grid, .split-grid, .contact-grid, .page-hero-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  :root { --container: min(100% - 28px, 1180px); }
  .site-header { padding-top: 10px; }
  .search-strip { display: grid; gap: 10px; }
  .domain-note { white-space: normal; }
  .hero { min-height: auto; padding-top: 46px; }
  .hero-metrics, .feature-grid, .video-grid, .case-grid, .review-grid, .inner-grid, .stats-grid, .footer-grid { grid-template-columns: 1fr; }
  .section-header, .footer-bottom, .download-card { display: grid; }
  .media-caption { display: grid; }
  .search-box { border-radius: 24px; align-items: stretch; }
  .search-box button { padding-inline: 16px; }
  h1 { font-size: clamp(38px, 13vw, 58px); }
  .page-card, .soft-panel { padding: 24px; }
}