/* roulang page: index */
:root {
  --primary: #FF7E8C;
  --primary-strong: #F25D6E;
  --primary-soft: #FFD6DC;
  --accent: #FFB088;
  --bg: #FFF8F5;
  --bg-alt: #FFF0EA;
  --surface: #FFFFFF;
  --text: #31201E;
  --text-muted: #8A706A;
  --border: #FFE3DD;
  --radius-sm: 16px;
  --radius-lg: 24px;
  --radius-full: 999px;
  --shadow-sm: 0 8px 20px rgba(255,126,140,0.08);
  --shadow-lg: 0 16px 32px rgba(255,126,140,0.16);
  --transition: 0.25s ease;
  --font: 'PingFang SC','HarmonyOS Sans SC','Source Han Sans SC','Noto Sans SC','Microsoft YaHei',sans-serif;
}
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body { font-family:var(--font); background:var(--bg); color:var(--text); line-height:1.75; font-size:16px; -webkit-font-smoothing:antialiased; padding-bottom:60px; }
a { color:inherit; text-decoration:none; transition:color var(--transition); }
img { max-width:100%; display:block; }
button, input, textarea { font-family:inherit; font-size:inherit; border:none; outline:none; }
ul, ol { list-style:none; }

.container { max-width:1200px; margin:0 auto; padding:0 24px; }
@media (max-width:767px) { .container { padding:0 16px; } }

/* ===== Header ===== */
.site-header { position:sticky; top:0; z-index:100; background:rgba(255,248,245,0.92); backdrop-filter:blur(12px); -webkit-backdrop-filter:blur(12px); border-bottom:1px solid var(--border); transition:box-shadow var(--transition); }
.site-header.scrolled { box-shadow:0 4px 20px rgba(255,126,140,0.12); }
.header-top { border-bottom:1px solid var(--border); }
.header-top-inner { display:flex; align-items:center; justify-content:space-between; height:60px; }
.brand { display:flex; align-items:center; gap:10px; flex-shrink:0; }
.brand-icon { width:36px; height:36px; border-radius:50%; background:linear-gradient(135deg,var(--primary),var(--accent)); display:flex; align-items:center; justify-content:center; font-size:18px; color:#fff; box-shadow:0 4px 10px rgba(255,126,140,0.3); }
.brand-name { font-size:20px; font-weight:800; color:var(--text); letter-spacing:0.5px; }
.header-search { display:flex; align-items:center; background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-full); padding:6px 8px 6px 16px; flex:0 1 320px; transition:border-color var(--transition), box-shadow var(--transition); }
.header-search:focus-within { border-color:var(--primary); box-shadow:0 0 0 3px rgba(255,126,140,0.25); }
.header-search input { flex:1; border:none; background:transparent; font-size:14px; color:var(--text); padding:6px 8px; }
.header-search input::placeholder { color:var(--text-muted); }
.header-search button { background:var(--primary); color:#fff; width:34px; height:34px; border-radius:50%; display:flex; align-items:center; justify-content:center; cursor:pointer; transition:background var(--transition); flex-shrink:0; }
.header-search button:hover { background:var(--primary-strong); }
.nav-toggle { display:none; background:none; font-size:22px; color:var(--text); cursor:pointer; width:40px; height:40px; border-radius:10px; align-items:center; justify-content:center; transition:background var(--transition); }
.nav-toggle:hover { background:var(--primary-soft); }
.header-bottom-inner { display:flex; align-items:center; justify-content:space-between; gap:16px; min-height:48px; }
.main-nav { display:flex; align-items:center; gap:8px; }
.main-nav .nav-link { display:inline-block; padding:8px 20px; border-radius:var(--radius-full); font-size:15px; font-weight:600; color:var(--text); transition:all var(--transition); }
.main-nav .nav-link:hover { color:var(--primary-strong); background:var(--primary-soft); }
.main-nav .nav-link.active { background:var(--primary); color:#fff; box-shadow:0 4px 12px rgba(255,126,140,0.3); }
.nav-hot { display:flex; align-items:center; gap:6px; }
.hot-tag { display:inline-block; background:var(--bg-alt); border:1px solid var(--border); color:var(--text-muted); font-size:12px; font-weight:600; padding:3px 12px; border-radius:var(--radius-full); transition:all var(--transition); cursor:default; }
.hot-tag:hover { background:var(--primary-soft); color:var(--primary-strong); border-color:var(--primary); }
.mobile-drawer { display:none; }
@media (max-width:767px) {
  .header-search { display:none; }
  .nav-toggle { display:flex; }
  .header-bottom { display:none; }
  .header-bottom.open { display:block; }
  .header-bottom-inner { flex-direction:column; align-items:flex-start; padding:12px 16px; }
  .main-nav { flex-wrap:wrap; gap:6px; }
  .nav-hot { flex-wrap:wrap; padding-top:8px; border-top:1px solid var(--border); width:100%; }
  .mobile-drawer { display:block; }
  .mobile-drawer .drawer-search { display:flex; align-items:center; background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-full); padding:4px 6px 4px 14px; margin-top:12px; }
  .mobile-drawer .drawer-search input { flex:1; border:none; background:transparent; font-size:14px; padding:6px 4px; color:var(--text); }
  .mobile-drawer .drawer-search button { background:var(--primary); color:#fff; width:30px; height:30px; border-radius:50%; display:flex; align-items:center; justify-content:center; cursor:pointer; }
}

/* ===== Hero ===== */
.hero { position:relative; min-height:100vh; display:flex; align-items:center; overflow:hidden; background:linear-gradient(135deg, var(--primary-soft) 0%, var(--bg) 60%, #FFF 100%); }
.hero::before { content:''; position:absolute; inset:0; background:url('/assets/images/backpic/back-1.jpg') center/cover no-repeat; opacity:0.18; }
.hero .container { position:relative; z-index:2; display:grid; grid-template-columns:1.05fr 0.95fr; gap:60px; align-items:center; padding-top:80px; padding-bottom:80px; }
.hero-badge { display:inline-flex; align-items:center; gap:8px; background:rgba(255,255,255,0.8); border:1px solid var(--border); border-radius:var(--radius-full); padding:6px 18px; font-size:13px; font-weight:600; color:var(--primary-strong); box-shadow:var(--shadow-sm); margin-bottom:24px; }
.hero-badge i { font-size:14px; }
.hero h1 { font-size:48px; font-weight:800; line-height:1.25; letter-spacing:-0.5px; margin-bottom:20px; color:var(--text); }
.hero h1 .highlight { color:var(--primary-strong); position:relative; }
.hero-sub { font-size:17px; line-height:1.8; color:var(--text-muted); margin-bottom:36px; max-width:520px; }
.hero-cta { display:flex; flex-wrap:wrap; gap:16px; margin-bottom:32px; }
.btn { display:inline-flex; align-items:center; justify-content:center; gap:8px; border-radius:var(--radius-full); font-weight:700; cursor:pointer; transition:all var(--transition); border:none; }
.btn-primary { background:var(--primary); color:#fff; padding:16px 36px; font-size:16px; box-shadow:0 6px 18px rgba(255,126,140,0.35); }
.btn-primary:hover { background:var(--primary-strong); transform:translateY(-2px); box-shadow:0 10px 24px rgba(242,93,110,0.4); }
.btn-primary:active { transform:translateY(0); box-shadow:0 4px 12px rgba(242,93,110,0.3); }
.btn-secondary { background:transparent; color:var(--primary-strong); padding:15px 32px; font-size:16px; border:2px solid var(--primary); }
.btn-secondary:hover { background:var(--primary-soft); border-color:var(--primary-strong); transform:translateY(-2px); }
.btn-secondary:active { transform:translateY(0); }
.btn:focus-visible { outline:3px solid rgba(255,126,140,0.45); outline-offset:2px; }
.hero-meta { display:flex; gap:28px; flex-wrap:wrap; }
.hero-meta-item { display:flex; align-items:center; gap:8px; font-size:14px; color:var(--text-muted); font-weight:500; }
.hero-meta-item i { color:var(--primary); }
.browser-window { background:var(--surface); border-radius:var(--radius-lg); box-shadow:0 24px 60px rgba(255,126,140,0.18), 0 8px 20px rgba(0,0,0,0.06); overflow:hidden; border:1px solid var(--border); }
.browser-top { display:flex; align-items:center; gap:8px; padding:14px 18px; background:var(--bg-alt); border-bottom:1px solid var(--border); }
.dot { width:12px; height:12px; border-radius:50%; display:inline-block; }
.dot-red { background:#FF5F57; }
.dot-yellow { background:#FEBC2E; }
.dot-green { background:#28C840; }
.browser-address { flex:1; margin-left:8px; background:var(--surface); border:1px solid var(--border); border-radius:8px; padding:5px 14px; font-size:13px; color:var(--text-muted); display:flex; align-items:center; gap:6px; }
.browser-address i { font-size:12px; color:var(--primary); }
.browser-body { display:flex; min-height:360px; }
.browser-sidebar { width:72px; background:var(--primary-soft); border-right:1px solid var(--border); padding:12px 8px; display:flex; flex-direction:column; gap:10px; align-items:center; }
.sidebar-icon { width:40px; height:40px; border-radius:12px; background:rgba(255,255,255,0.8); display:flex; align-items:center; justify-content:center; font-size:16px; color:var(--primary-strong); }
.sidebar-icon.active { background:var(--primary); color:#fff; }
.browser-content { flex:1; padding:20px; background:var(--bg); display:flex; flex-direction:column; gap:14px; }
.content-bar { height:12px; border-radius:6px; background:var(--border); }
.content-bar.short { width:55%; }
.content-bar.medium { width:80%; }
.content-card { background:var(--surface); border-radius:12px; padding:16px; display:flex; flex-direction:column; gap:8px; box-shadow:var(--shadow-sm); }
.content-card .card-line { height:8px; border-radius:4px; background:var(--primary-soft); }
.content-card .card-line.dark { background:var(--primary); }
.content-grid { display:grid; grid-template-columns:1fr 1fr; gap:12px; }
.content-box { background:var(--surface); border-radius:12px; padding:12px; display:flex; flex-direction:column; gap:6px; box-shadow:var(--shadow-sm); }
.content-box .box-line { height:7px; border-radius:4px; background:var(--border); }
.content-box .box-line.orange { background:var(--accent); }
.hero-stats { display:flex; gap:20px; margin-top:12px; }
.hero-stat { text-align:center; background:rgba(255,255,255,0.8); border-radius:16px; padding:12px 16px; border:1px solid var(--border); }
.hero-stat .num { font-size:22px; font-weight:800; color:var(--primary-strong); font-variant-numeric:tabular-nums; }
.hero-stat .label { font-size:12px; color:var(--text-muted); }
@media (max-width:991px) {
  .hero .container { grid-template-columns:1fr; gap:40px; }
  .hero h1 { font-size:36px; }
}
@media (max-width:767px) {
  .hero { min-height:auto; }
  .hero .container { padding-top:60px; padding-bottom:60px; }
  .hero h1 { font-size:30px; line-height:1.3; }
  .hero-sub { font-size:15px; }
  .hero-cta .btn { width:100%; }
  .browser-body { min-height:260px; }
  .browser-sidebar { width:56px; }
}

/* ===== Section Common ===== */
.section { padding:100px 0; }
.section-header { text-align:center; max-width:640px; margin:0 auto 64px; }
.section-header .tag { display:inline-block; background:var(--primary-soft); color:var(--primary-strong); font-size:13px; font-weight:700; padding:5px 16px; border-radius:var(--radius-full); margin-bottom:16px; }
.section-header h2 { font-size:36px; font-weight:800; line-height:1.3; margin-bottom:16px; }
.section-header p { font-size:16px; color:var(--text-muted); line-height:1.8; }
@media (max-width:767px) {
  .section { padding:56px 0; }
  .section-header h2 { font-size:28px; }
  .section-header { margin-bottom:40px; }
}

/* ===== Features ===== */
.features { background:var(--bg); }
.features-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.feature-card { border-radius:var(--radius-lg); padding:32px; position:relative; overflow:hidden; transition:all var(--transition); border:1px solid var(--border); }
.feature-card:hover { transform:translateY(-4px); box-shadow:var(--shadow-lg); }
.feature-card .icon-wrap { width:56px; height:56px; border-radius:20px; display:flex; align-items:center; justify-content:center; font-size:24px; margin-bottom:20px; }
.feature-card h3 { font-size:20px; font-weight:800; margin-bottom:12px; }
.feature-card p { font-size:14px; color:var(--text-muted); line-height:1.7; }
.feature-speed { background:linear-gradient(135deg, var(--primary), #FF9DA6); color:#fff; border:none; }
.feature-speed .icon-wrap { background:rgba(255,255,255,0.25); }
.feature-speed h3 { color:#fff; }
.feature-speed p { color:rgba(255,255,255,0.9); }
.speed-ring { position:absolute; right:-30px; top:-30px; width:140px; height:140px; border-radius:50%; border:12px solid rgba(255,255,255,0.2); }
.speed-ring::after { content:''; position:absolute; inset:-2px; border-radius:50%; border:12px solid rgba(255,255,255,0.15); }
.feature-clean { background:var(--surface); }
.feature-clean .icon-wrap { background:var(--primary-soft); color:var(--primary-strong); }
.feature-clean .clean-badge { display:inline-flex; align-items:center; gap:8px; background:var(--bg-alt); border:1px solid var(--border); border-radius:var(--radius-full); padding:3px 12px; font-size:12px; font-weight:600; color:var(--text-muted); margin-top:12px; }
.feature-safe { background:var(--bg-alt); }
.feature-safe .icon-wrap { background:#FFF; color:var(--accent); border:1px solid var(--border); }
.safe-bars { display:flex; align-items:flex-end; gap:6px; height:48px; margin-top:16px; }
.safe-bars span { width:14px; border-radius:4px 4px 0 0; background:var(--accent); }
.safe-bars span:nth-child(1){ height:45%; }
.safe-bars span:nth-child(2){ height:70%; }
.safe-bars span:nth-child(3){ height:55%; }
.safe-bars span:nth-child(4){ height:90%; }
.safe-bars span:nth-child(5){ height:65%; }
@media (max-width:991px) {
  .features-grid { grid-template-columns:1fr; }
}

/* ===== Scenarios ===== */
.scenarios { background:var(--bg-alt); }
.scenario-item { display:grid; grid-template-columns:1fr 1fr; gap:56px; align-items:center; margin-bottom:80px; }
.scenario-item:last-child { margin-bottom:0; }
.scenario-item.reverse .scenario-img { order:2; }
.scenario-item.reverse .scenario-text { order:1; }
.scenario-icon { width:48px; height:48px; border-radius:16px; background:var(--primary); display:flex; align-items:center; justify-content:center; font-size:20px; color:#fff; margin-bottom:16px; box-shadow:0 4px 12px rgba(255,126,140,0.3); }
.scenario-text h3 { font-size:24px; font-weight:800; margin-bottom:12px; }
.scenario-text p { font-size:15px; color:var(--text-muted); line-height:1.8; margin-bottom:16px; }
.scenario-link { display:inline-flex; align-items:center; gap:6px; font-weight:600; color:var(--primary-strong); font-size:14px; transition:gap var(--transition); }
.scenario-link:hover { gap:10px; color:var(--primary-strong); }
.scenario-img { border-radius:var(--radius-lg); overflow:hidden; box-shadow:var(--shadow-lg); position:relative; }
.scenario-img img { width:100%; height:320px; object-fit:cover; transition:transform 0.5s ease; }
.scenario-img:hover img { transform:scale(1.02); }
.scenario-img::after { content:''; position:absolute; inset:0; background:linear-gradient(0deg, rgba(255,126,140,0.15) 0%, transparent 100%); pointer-events:none; }
@media (max-width:991px) {
  .scenario-item { grid-template-columns:1fr; gap:32px; }
  .scenario-item.reverse .scenario-img { order:1; }
  .scenario-item.reverse .scenario-text { order:2; }
  .scenario-img img { height:240px; }
}

/* ===== Social Proof ===== */
.social-proof { background:var(--bg); }
.stats-row { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; margin-bottom:72px; }
.stat-item { text-align:center; background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-lg); padding:36px 24px; transition:all var(--transition); }
.stat-item:hover { transform:translateY(-4px); box-shadow:var(--shadow-lg); }
.stat-num { font-size:44px; font-weight:900; color:var(--primary-strong); font-variant-numeric:tabular-nums; line-height:1.2; margin-bottom:6px; }
.stat-label { font-size:14px; color:var(--text-muted); font-weight:500; }
.testimonials-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.testimonial-card { background:var(--surface); border:1px solid var(--primary-soft); border-radius:var(--radius-lg); padding:32px; transition:all var(--transition); position:relative; }
.testimonial-card:hover { transform:translateY(-4px); box-shadow:var(--shadow-lg); border-color:var(--primary); }
.testimonial-stars { color:#FFB800; font-size:14px; margin-bottom:16px; letter-spacing:2px; }
.testimonial-text { font-size:15px; line-height:1.8; color:var(--text); margin-bottom:20px; }
.testimonial-user { display:flex; align-items:center; gap:12px; }
.testimonial-avatar { width:44px; height:44px; border-radius:50%; background:linear-gradient(135deg,var(--primary),var(--accent)); display:flex; align-items:center; justify-content:center; font-weight:800; color:#fff; font-size:16px; }
.testimonial-name { font-weight:700; font-size:14px; }
.testimonial-role { font-size:12px; color:var(--text-muted); }
@media (max-width:991px) {
  .stats-row { grid-template-columns:1fr 1fr; }
  .testimonials-grid { grid-template-columns:1fr; }
}
@media (max-width:767px) {
  .stats-row { grid-template-columns:1fr; }
  .stat-num { font-size:36px; }
}

/* ===== FAQ ===== */
.faq { background:var(--bg); }
.faq-list { max-width:840px; margin:0 auto; }
.faq-item { background:var(--surface); border:1px solid var(--border); border-radius:16px; margin-bottom:16px; padding:24px 28px; transition:border-color var(--transition), box-shadow var(--transition); }
.faq-item.active { border-color:var(--primary); box-shadow:var(--shadow-sm); }
.faq-header { display:flex; align-items:center; justify-content:space-between; cursor:pointer; gap:16px; }
.faq-header h3 { font-size:16px; font-weight:700; color:var(--text); line-height:1.5; }
.faq-toggle { width:32px; height:32px; border-radius:50%; border:2px solid var(--primary); background:transparent; color:var(--primary-strong); font-size:18px; display:flex; align-items:center; justify-content:center; cursor:pointer; transition:all 0.3s ease; flex-shrink:0; }
.faq-item.active .faq-toggle { transform:rotate(45deg); background:var(--primary); color:#fff; }
.faq-answer { max-height:0; overflow:hidden; transition:max-height 0.3s ease; }
.faq-answer-inner { padding-top:14px; font-size:14px; line-height:1.7; color:var(--text-muted); }
@media (max-width:767px) {
  .faq-item { padding:18px 20px; }
  .faq-header h3 { font-size:14px; }
}

/* ===== Bottom CTA ===== */
.bottom-cta { position:fixed; bottom:0; left:0; right:0; background:var(--primary-strong); z-index:90; box-shadow:0 -4px 20px rgba(242,93,110,0.25); }
.bottom-cta-inner { display:flex; align-items:center; justify-content:space-between; height:60px; gap:16px; }
.bottom-cta-tag { font-size:14px; font-weight:600; color:#fff; white-space:nowrap; }
.bottom-cta-btn { display:inline-flex; align-items:center; gap:6px; background:#fff; color:var(--primary-strong); font-weight:700; font-size:14px; padding:8px 24px; border-radius:var(--radius-full); transition:all var(--transition); white-space:nowrap; }
.bottom-cta-btn:hover { background:var(--primary-soft); transform:translateY(-1px); box-shadow:0 4px 12px rgba(0,0,0,0.1); }
.bottom-cta-btn i { font-size:12px; }
@media (max-width:767px) {
  body { padding-bottom:52px; }
  .bottom-cta-inner { height:52px; }
  .bottom-cta-tag { font-size:13px; }
  .bottom-cta-btn { padding:6px 16px; font-size:13px; }
}

/* ===== Footer ===== */
.site-footer { background:var(--bg-alt); border-top:1px solid var(--border); padding-top:64px; }
.footer-top { display:grid; grid-template-columns:1.4fr 0.8fr 0.8fr 1fr; gap:40px; padding-bottom:40px; }
.footer-brand .footer-logo { display:flex; align-items:center; gap:10px; margin-bottom:16px; }
.footer-brand p { font-size:14px; color:var(--text-muted); line-height:1.7; }
.footer-col h4 { font-size:16px; font-weight:800; margin-bottom:18px; color:var(--text); }
.footer-col ul li { margin-bottom:10px; }
.footer-col ul li a { font-size:14px; color:var(--text-muted); transition:color var(--transition), padding-left var(--transition); }
.footer-col ul li a:hover { color:var(--primary-strong); padding-left:4px; }
.footer-download { display:flex; flex-direction:column; gap:10px; }
.footer-download-btn { display:inline-flex; align-items:center; justify-content:center; gap:8px; background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-full); padding:10px 20px; font-size:14px; font-weight:600; color:var(--text); transition:all var(--transition); }
.footer-download-btn:hover { border-color:var(--primary); color:var(--primary-strong); box-shadow:var(--shadow-sm); }
.footer-download-btn i { color:var(--primary); }
.footer-bottom { border-top:1px solid var(--border); padding:24px 0; text-align:center; }
.footer-bottom p { font-size:13px; color:var(--text-muted); }
@media (max-width:991px) {
  .footer-top { grid-template-columns:1fr 1fr; }
}
@media (max-width:767px) {
  .footer-top { grid-template-columns:1fr; gap:32px; }
  .site-footer { padding-top:48px; }
}

/* ===== focus ===== */
a:focus-visible, button:focus-visible { outline:3px solid rgba(255,126,140,0.45); outline-offset:2px; border-radius:4px; }

/* roulang page: category1 */
:root {
  --primary: #FF7E8C;
  --primary-strong: #F25D6E;
  --primary-soft: #FFD6DC;
  --accent: #FFB088;
  --bg: #FFF8F5;
  --bg-alt: #FFF0EA;
  --surface: #FFFFFF;
  --text: #31201E;
  --text-muted: #8A706A;
  --border: #FFE3DD;
  --radius-sm: 16px;
  --radius-lg: 24px;
  --radius-full: 999px;
  --shadow-sm: 0 8px 20px rgba(255,126,140,0.08);
  --shadow-lg: 0 16px 32px rgba(255,126,140,0.16);
  --transition: 0.25s ease;
  --font: 'PingFang SC','HarmonyOS Sans SC','Source Han Sans SC','Noto Sans SC','Microsoft YaHei',sans-serif;
}
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 60px;
  overflow-x: hidden;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition), background var(--transition), box-shadow var(--transition), transform var(--transition);
}
img {
  max-width: 100%;
  display: block;
}
button,
input,
textarea {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
}
ul,
ol {
  list-style: none;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 3px solid rgba(255,126,140,0.45);
  outline-offset: 2px;
}
::selection {
  background: var(--primary-soft);
  color: var(--text);
}
/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,248,245,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}
.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(255,126,140,0.12);
}
.header-top {
  border-bottom: 1px solid var(--border);
}
.header-top-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  gap: 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: #fff;
  box-shadow: 0 4px 10px rgba(255,126,140,0.3);
}
.brand-name {
  font-size: 20px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.header-search {
  display: flex;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 6px 8px 6px 16px;
  flex: 0 1 320px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.header-search:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(255,126,140,0.25);
}
.header-search input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 14px;
  color: var(--text);
  padding: 6px 8px;
  min-width: 0;
}
.header-search input::placeholder {
  color: var(--text-muted);
}
.header-search button {
  background: var(--primary);
  color: #fff;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--transition);
  flex-shrink: 0;
}
.header-search button:hover {
  background: var(--primary-strong);
}
.nav-toggle {
  display: none;
  background: none;
  font-size: 22px;
  color: var(--text);
  cursor: pointer;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
  border: 1px solid var(--border);
  background: var(--surface);
}
.nav-toggle:hover {
  background: var(--primary-soft);
}
.header-bottom {
  border-top: none;
}
.header-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 48px;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}
.main-nav .nav-link {
  display: inline-block;
  padding: 8px 20px;
  border-radius: var(--radius-full);
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  transition: all var(--transition);
}
.main-nav .nav-link:hover {
  color: var(--primary-strong);
  background: var(--primary-soft);
}
.main-nav .nav-link.active {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 12px rgba(255,126,140,0.3);
}
.nav-hot {
  display: flex;
  align-items: center;
  gap: 6px;
}
.hot-tag {
  display: inline-block;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: var(--radius-full);
  transition: all var(--transition);
  cursor: default;
  white-space: nowrap;
}
.hot-tag:hover {
  background: var(--primary-soft);
  color: var(--primary-strong);
  border-color: var(--primary);
}
.mobile-drawer {
  display: none;
}
/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-full);
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition);
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(255,126,140,0.28);
}
.btn-primary:hover {
  background: var(--primary-strong);
  box-shadow: 0 6px 20px rgba(242,93,110,0.34);
  transform: translateY(-2px);
}
.btn-primary:active {
  transform: translateY(0);
}
.btn-outline {
  background: transparent;
  color: var(--primary-strong);
  border-color: var(--primary);
}
.btn-outline:hover {
  background: var(--primary-soft);
  border-color: var(--primary-strong);
  color: var(--primary-strong);
  transform: translateY(-2px);
}
.btn-lg {
  padding: 16px 32px;
  font-size: 16px;
}
.btn-sm {
  padding: 10px 20px;
  font-size: 14px;
}
.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary);
  color: #fff;
  padding: 10px 22px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 700;
  transition: all var(--transition);
  box-shadow: 0 4px 12px rgba(255,126,140,0.25);
}
.btn-download:hover {
  background: var(--primary-strong);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(242,93,110,0.3);
}
.btn-download-light {
  background: #fff;
  color: var(--primary-strong);
}
.btn-download-light:hover {
  background: var(--primary-soft);
  color: var(--primary-strong);
}
/* ===== Hero: video style ===== */
.video-hero {
  position: relative;
  background: url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
  min-height: 86vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.video-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(242,93,110,0.78) 0%, rgba(255,126,140,0.62) 50%, rgba(255,176,136,0.58) 100%);
}
.video-hero .container {
  position: relative;
  z-index: 2;
  text-align: center;
  padding-top: 110px;
  padding-bottom: 90px;
  width: 100%;
}
.hero-breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.88);
  border: 1px solid rgba(255,255,255,0.4);
  border-radius: var(--radius-full);
  padding: 6px 18px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
  backdrop-filter: blur(4px);
}
.hero-breadcrumb i {
  color: var(--primary);
}
.hero-breadcrumb a:hover {
  color: var(--primary-strong);
}
.video-hero h1 {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.22;
  color: #fff;
  text-shadow: 0 2px 20px rgba(0,0,0,0.12);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.video-hero .hero-desc {
  max-width: 640px;
  margin: 0 auto 28px;
  font-size: 17px;
  line-height: 1.8;
  color: #FFF8F5;
  text-shadow: 0 1px 8px rgba(0,0,0,0.1);
}
.play-btn-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 20px;
}
.play-btn {
  width: 76px;
  height: 76px;
  border-radius: 50%;
  background: #fff;
  color: var(--primary-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  box-shadow: 0 8px 30px rgba(255,255,255,0.35);
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
}
.play-btn::after {
  content: '';
  position: absolute;
  inset: -10px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.55);
  animation: pulse-ring 2s infinite ease-out;
}
@keyframes pulse-ring {
  0% {
    transform: scale(0.9);
    opacity: 0.7;
  }
  70% {
    transform: scale(1.15);
    opacity: 0;
  }
  100% {
    opacity: 0;
  }
}
.play-btn:hover {
  transform: scale(1.08);
  box-shadow: 0 12px 36px rgba(255,255,255,0.45);
}
.hero-video-tip {
  color: rgba(255,255,255,0.85);
  font-size: 13px;
  margin-bottom: 32px;
  display: block;
}
.hero-cta {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
}
.hero-cta .btn-primary {
  background: #fff;
  color: var(--primary-strong);
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}
.hero-cta .btn-primary:hover {
  background: var(--primary-soft);
  color: var(--primary-strong);
  box-shadow: 0 10px 28px rgba(0,0,0,0.16);
}
.hero-cta .btn-outline {
  background: rgba(255,255,255,0.16);
  color: #fff;
  border-color: rgba(255,255,255,0.72);
  backdrop-filter: blur(4px);
}
.hero-cta .btn-outline:hover {
  background: rgba(255,255,255,0.28);
  border-color: #fff;
  color: #fff;
}
/* ===== Section: category intro ===== */
.category-intro {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.category-intro-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 0;
  flex-wrap: wrap;
}
.category-intro-text {
  flex: 1;
  min-width: 260px;
}
.category-intro-text h2 {
  font-size: 24px;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 4px;
}
.category-intro-text p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 640px;
}
.category-intro-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.subscribe-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  color: var(--primary-strong);
  padding: 10px 20px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}
.subscribe-btn:hover {
  background: var(--primary-soft);
  border-color: var(--primary);
  transform: translateY(-2px);
}
/* ===== Section base ===== */
.section-block {
  padding: 96px 0;
}
.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 48px;
}
.section-tag {
  display: inline-block;
  background: var(--primary-soft);
  color: var(--primary-strong);
  font-size: 13px;
  font-weight: 700;
  padding: 5px 16px;
  border-radius: var(--radius-full);
  margin-bottom: 14px;
}
.section-head h2 {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.3;
  color: var(--text);
  margin-bottom: 14px;
}
.section-head p {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.75;
}
/* ===== Selling points ===== */
.selling-section {
  background: var(--bg);
}
.selling-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.selling-card {
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}
.selling-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.selling-card-1 {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.selling-card-1 .speed-ring {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  background: conic-gradient(#fff 0deg 270deg, rgba(255,255,255,0.3) 270deg 360deg);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  margin-bottom: 24px;
}
.selling-card-1 .speed-ring::before {
  content: '';
  position: absolute;
  inset: 8px;
  border-radius: 50%;
  background: var(--primary);
}
.selling-card-1 .speed-ring span {
  position: relative;
  z-index: 2;
  color: #fff;
  font-weight: 800;
  font-size: 20px;
}
.selling-card-1 h3 {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 10px;
}
.selling-card-1 p {
  font-size: 14px;
  line-height: 1.7;
  opacity: 0.92;
}
.selling-card-2 {
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.selling-card-2 .lock-badge {
  width: 68px;
  height: 68px;
  border-radius: 18px;
  background: var(--primary-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-strong);
  font-size: 28px;
  margin-bottom: 22px;
  border: 1px solid var(--primary);
}
.selling-card-2 h3 {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 10px;
}
.selling-card-2 p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}
.selling-card-3 {
  background: var(--bg-alt);
  border: 1px solid var(--border);
}
.selling-card-3 .clean-data {
  margin-bottom: 22px;
}
.selling-card-3 .data-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.selling-card-3 .data-row:last-child {
  margin-bottom: 0;
}
.selling-card-3 .data-label {
  font-size: 12px;
  color: var(--text-muted);
  width: 72px;
  flex-shrink: 0;
  text-align: right;
}
.selling-card-3 .data-track {
  flex: 1;
  height: 8px;
  border-radius: var(--radius-full);
  background: rgba(255,126,140,0.14);
  overflow: hidden;
}
.selling-card-3 .data-fill {
  height: 100%;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, var(--primary), var(--accent));
}
.selling-card-3 h3 {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 10px;
}
.selling-card-3 p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}
/* ===== Featured tips ===== */
.tips-section {
  background: var(--bg-alt);
}
.tips-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.tip-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.tip-card::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 56px;
  height: 56px;
  background: radial-gradient(circle at top right, var(--primary-soft), transparent 70%);
  opacity: 0.7;
  transition: opacity var(--transition);
}
.tip-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}
.tip-card:hover::after {
  opacity: 1;
}
.tip-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 20px;
  margin-bottom: 18px;
}
.tip-card h3 {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 8px;
}
.tip-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
}
.tip-card .tip-link {
  display: inline-block;
  margin-top: 16px;
  font-size: 13px;
  font-weight: 700;
  color: var(--primary-strong);
}
.tip-card .tip-link:hover {
  text-decoration: underline;
}
/* ===== Scenarios ===== */
.scenario-section {
  background: var(--bg);
}
.scenario-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  margin-bottom: 80px;
}
.scenario-row:last-child {
  margin-bottom: 0;
}
.scenario-row.reverse .scenario-media {
  order: 2;
}
.scenario-row.reverse .scenario-body {
  order: 1;
}
.scenario-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition);
  aspect-ratio: 4/3;
}
.scenario-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.scenario-media:hover {
  box-shadow: var(--shadow-lg);
}
.scenario-media:hover img {
  transform: scale(1.02);
}
.scenario-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary-soft);
  color: var(--primary-strong);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 18px;
}
.scenario-body h3 {
  font-size: 26px;
  font-weight: 800;
  line-height: 1.4;
  margin-bottom: 14px;
}
.scenario-body p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 20px;
}
.scenario-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 700;
  color: var(--primary-strong);
}
.scenario-link i {
  transition: transform var(--transition);
}
.scenario-link:hover i {
  transform: translateX(4px);
}
.scenario-link:hover {
  text-decoration: underline;
}
/* ===== Process ===== */
.process-section {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.process-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  counter-reset: step;
}
.process-step {
  text-align: center;
  padding: 40px 28px;
  border-radius: var(--radius-lg);
  background: var(--bg);
  border: 1px solid var(--border);
  transition: all var(--transition);
  position: relative;
}
.process-step:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}
.process-step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  top: -18px;
  left: 50%;
  transform: translateX(-50%);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(255,126,140,0.32);
}
.process-icon {
  width: 56px;
  height: 56px;
  border-radius: 18px;
  background: var(--primary-soft);
  color: var(--primary-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin: 0 auto 18px;
}
.process-step h3 {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 10px;
}
.process-step p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}
/* ===== FAQ ===== */
.faq-section {
  background: var(--bg);
}
.faq-list {
  max-width: 860px;
  margin: 0 auto;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition);
}
.faq-item.open {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: 20px 24px;
  background: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  gap: 16px;
  text-align: left;
}
.faq-question:hover {
  color: var(--primary-strong);
}
.faq-icon {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 1px solid var(--primary);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  transition: transform 0.3s ease, background var(--transition), color var(--transition);
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: var(--primary);
  color: #fff;
}
.faq-answer {
  display: none;
  padding: 0 24px 20px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-muted);
}
.faq-item.open .faq-answer {
  display: block;
}
/* ===== CTA ===== */
.cta-section {
  position: relative;
  background: url('/assets/images/backpic/back-4.jpg') center/cover no-repeat;
  padding: 96px 0;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,126,140,0.9), rgba(242,93,110,0.82));
}
.cta-section .container {
  position: relative;
  z-index: 2;
  text-align: center;
}
.cta-inner {
  max-width: 680px;
  margin: 0 auto;
}
.cta-inner h2 {
  font-size: 38px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
  text-shadow: 0 2px 16px rgba(0,0,0,0.12);
}
.cta-inner p {
  font-size: 17px;
  color: rgba(255,255,255,0.92);
  margin-bottom: 32px;
}
.cta-buttons {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
}
.cta-buttons .btn-primary {
  background: #fff;
  color: var(--primary-strong);
  box-shadow: 0 8px 24px rgba(0,0,0,0.14);
}
.cta-buttons .btn-primary:hover {
  background: var(--primary-soft);
  color: var(--primary-strong);
}
.cta-buttons .btn-outline {
  background: rgba(255,255,255,0.16);
  color: #fff;
  border-color: rgba(255,255,255,0.72);
}
.cta-buttons .btn-outline:hover {
  background: rgba(255,255,255,0.28);
  border-color: #fff;
  color: #fff;
}
/* ===== Footer ===== */
.site-footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-radius: 32px 32px 0 0;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr 1.2fr;
  gap: 40px;
  padding: 56px 0 40px;
}
.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.footer-brand .footer-logo .brand-icon {
  width: 34px;
  height: 34px;
}
.footer-brand .footer-logo .brand-name {
  font-size: 19px;
}
.footer-brand p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.75;
  max-width: 300px;
}
.footer-col h4 {
  font-size: 16px;
  font-weight: 800;
  margin-bottom: 18px;
  color: var(--text);
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul a {
  font-size: 14px;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition);
}
.footer-col ul a::before {
  content: '';
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--primary);
  opacity: 0.5;
  transition: opacity var(--transition);
}
.footer-col ul a:hover {
  color: var(--primary-strong);
  padding-left: 4px;
}
.footer-col ul a:hover::before {
  opacity: 1;
}
.footer-download {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 18px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  transition: all var(--transition);
}
.footer-download-btn:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(255,126,140,0.28);
}
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  text-align: center;
}
.footer-bottom p {
  font-size: 13px;
  color: var(--text-muted);
}
/* ===== Bottom fixed bar ===== */
.bottom-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 90;
  background: var(--primary-strong);
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 24px;
  box-shadow: 0 -4px 20px rgba(242,93,110,0.24);
  gap: 16px;
}
.bottom-bar-text {
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.bottom-bar-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  color: var(--primary-strong);
  padding: 10px 24px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
  transition: all var(--transition);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.bottom-bar-btn:hover {
  background: var(--primary-soft);
  transform: translateY(-2px);
}
/* ===== Video modal ===== */
.video-modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.video-modal.open {
  display: flex;
}
.video-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(49,32,30,0.72);
  backdrop-filter: blur(6px);
}
.video-modal-box {
  position: relative;
  width: min(860px, 92vw);
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  animation: modal-in 0.3s ease;
}
@keyframes modal-in {
  from {
    opacity: 0;
    transform: translateY(24px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}
.video-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}
.video-modal-header span {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
}
.video-modal-close {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition);
}
.video-modal-close:hover {
  background: var(--primary);
  color: #fff;
}
.video-modal-body {
  padding: 24px;
  background: var(--bg-alt);
}
.video-placeholder {
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--primary), var(--accent));
  min-height: 360px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.video-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
  opacity: 0.25;
}
.video-placeholder i {
  font-size: 48px;
  position: relative;
  z-index: 2;
  background: rgba(255,255,255,0.22);
  width: 88px;
  height: 88px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform var(--transition);
}
.video-placeholder i:hover {
  transform: scale(1.08);
}
.video-placeholder p {
  font-size: 16px;
  font-weight: 700;
  position: relative;
  z-index: 2;
}
/* ===== Back to top ===== */
.back-top {
  position: fixed;
  right: 24px;
  bottom: 80px;
  z-index: 80;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--primary-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
}
.back-top.show {
  opacity: 1;
  visibility: visible;
}
.back-top:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
/* ===== Responsive ===== */
@media (max-width: 992px) {
  .selling-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
  .selling-card {
    padding: 26px 20px;
  }
  .tips-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .scenario-row {
    grid-template-columns: 1fr;
    gap: 32px;
    margin-bottom: 56px;
  }
  .scenario-row.reverse .scenario-media {
    order: 0;
  }
  .scenario-row.reverse .scenario-body {
    order: 0;
  }
  .process-steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .header-search {
    flex: 0 1 240px;
  }
}
@media (max-width: 767px) {
  body {
    font-size: 15px;
    padding-bottom: 52px;
  }
  .container {
    padding: 0 16px;
  }
  .header-top-inner {
    height: 56px;
  }
  .header-search {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .header-bottom {
    display: none;
  }
  .mobile-drawer {
    display: none;
    background: var(--bg);
    border-top: 1px solid var(--border);
    box-shadow: 0 8px 20px rgba(255,126,140,0.1);
  }
  .mobile-drawer.open {
    display: block;
  }
  .mobile-drawer .container {
    padding: 16px;
  }
  .drawer-search {
    display: flex;
    align-items: center;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    padding: 4px 6px 4px 14px;
    margin-bottom: 14px;
  }
  .drawer-search input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: 14px;
    padding: 6px 4px;
    color: var(--text);
    min-width: 0;
  }
  .drawer-search input::placeholder {
    color: var(--text-muted);
  }
  .drawer-search button {
    background: var(--primary);
    color: #fff;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    flex-shrink: 0;
  }
  .mobile-drawer .main-nav {
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 12px;
  }
  .mobile-drawer .nav-hot {
    flex-wrap: wrap;
    gap: 6px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
  }
  .video-hero {
    min-height: 72vh;
  }
  .video-hero .container {
    padding-top: 64px;
    padding-bottom: 56px;
  }
  .video-hero h1 {
    font-size: 32px;
    line-height: 1.3;
  }
  .video-hero .hero-desc {
    font-size: 15px;
    margin-bottom: 20px;
  }
  .play-btn {
    width: 62px;
    height: 62px;
    font-size: 22px;
  }
  .hero-cta .btn {
    width: 100%;
    max-width: 320px;
  }
  .category-intro-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 22px 0;
  }
  .section-block {
    padding: 56px 0;
  }
  .section-head h2 {
    font-size: 28px;
  }
  .section-head p {
    font-size: 15px;
  }
  .selling-grid {
    grid-template-columns: 1fr;
  }
  .tips-grid {
    grid-template-columns: 1fr;
  }
  .scenario-row {
    gap: 24px;
    margin-bottom: 48px;
  }
  .scenario-body h3 {
    font-size: 22px;
  }
  .process-steps {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .process-step {
    padding: 32px 20px;
  }
  .faq-question {
    padding: 16px 18px;
    font-size: 15px;
  }
  .faq-answer {
    padding: 0 18px 16px;
  }
  .cta-section {
    padding: 64px 0;
  }
  .cta-inner h2 {
    font-size: 28px;
  }
  .cta-inner p {
    font-size: 15px;
  }
  .cta-buttons .btn {
    width: 100%;
    max-width: 280px;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 40px 0 28px;
  }
  .footer-brand p {
    max-width: 100%;
  }
  .bottom-bar {
    min-height: 52px;
    padding: 8px 16px;
  }
  .bottom-bar-text {
    font-size: 13px;
  }
  .bottom-bar-btn {
    padding: 8px 18px;
    font-size: 13px;
  }
  .back-top {
    right: 16px;
    bottom: 68px;
    width: 40px;
    height: 40px;
  }
  .video-modal-body {
    padding: 14px;
  }
  .video-placeholder {
    min-height: 240px;
  }
}
@media (min-width: 768px) and (max-width: 991px) {
  .mobile-drawer {
    display: none !important;
  }
  .selling-grid {
    grid-template-columns: 1fr 1fr;
  }
  .selling-card-1 {
    grid-column: span 2;
  }
  .tips-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .scenario-row {
    grid-template-columns: 1fr;
  }
  .scenario-row.reverse .scenario-media {
    order: 0;
  }
  .scenario-row.reverse .scenario-body {
    order: 0;
  }
  .process-steps {
    grid-template-columns: 1fr 1fr 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}