/* ============================================================
   HighDeen Academy — Main Stylesheet
   ============================================================ */

:root {
  --primary: #8B1A1A;
  --primary-dark: #6a1212;
  --primary-light: #c0392b;
  --gold: #c9a84c;
  --gold-light: #f0d080;
  --dark: #1a1a2e;
  --dark2: #16213e;
  --text: #2d2d2d;
  --text-light: #666;
  --bg-light: #f9f7f4;
  --bg-cream: #fdf6ec;
  --white: #ffffff;
  --border: #e0d6cc;
  --shadow: 0 4px 24px rgba(139,26,26,0.10);
  --shadow-lg: 0 12px 48px rgba(139,26,26,0.18);
  --radius: 12px;
  --radius-lg: 20px;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'Segoe UI', 'Inter', Arial, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.65;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; }

/* ── Typography ── */
h1, h2, h3, h4 { font-weight: 700; line-height: 1.25; }
h1 { font-size: clamp(2rem, 5vw, 3.4rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.5rem); }

.section-title {
  text-align: center;
  margin-bottom: 3rem;
}
.section-title h2 { color: var(--dark); }
.section-title p { color: var(--text-light); margin-top: .75rem; max-width: 600px; margin-inline: auto; }
.section-title .underline {
  width: 64px; height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--gold));
  border-radius: 2px;
  margin: .75rem auto 0;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .75rem 1.75rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: .95rem;
  cursor: pointer;
  transition: all .25s;
  border: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: var(--white);
  box-shadow: 0 4px 16px rgba(139,26,26,.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(139,26,26,.4); }
.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-outline:hover { background: var(--primary); color: var(--white); }
.btn-gold {
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  color: var(--dark);
  box-shadow: 0 4px 16px rgba(201,168,76,.35);
}
.btn-gold:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(201,168,76,.5); }
.btn-lg { padding: 1rem 2.25rem; font-size: 1.05rem; }

/* ── Container ── */
.container { max-width: 1180px; margin: 0 auto; padding: 0 1.5rem; }
section { padding: 5rem 0; }

/* ============================================================
   HEADER / NAV
   ============================================================ */
#navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 1rem 0;
  transition: all .35s;
}
#navbar.scrolled {
  background: rgba(255,255,255,.97);
  backdrop-filter: blur(12px);
  box-shadow: 0 2px 20px rgba(0,0,0,.1);
  padding: .65rem 0;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.nav-logo { display: flex; align-items: center; gap: .75rem; }
.nav-logo img { height: 48px; width: auto; }
.nav-logo-text { line-height: 1.15; }
.nav-logo-text .name { font-size: 1.1rem; font-weight: 800; color: var(--primary); }
.nav-logo-text .tagline { font-size: .7rem; color: var(--gold); letter-spacing: .05em; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}
.nav-links a {
  font-weight: 500;
  font-size: .9rem;
  color: var(--dark);
  transition: color .2s;
  position: relative;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0; right: 0;
  height: 2px; background: var(--primary); transform: scaleX(0); transition: transform .25s;
}
.nav-links a:hover { color: var(--primary); }
.nav-links a:hover::after { transform: scaleX(1); }
#navbar.scrolled .nav-links a { color: var(--text); }
.nav-cta { display: flex; gap: .75rem; }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: .4rem; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--dark); transition: all .3s; border-radius: 2px; }
#navbar.scrolled .hamburger span { background: var(--dark); }

/* Mobile nav */
@media (max-width: 900px) {
  .nav-links, .nav-cta { display: none; }
  .hamburger { display: flex; }
  .nav-links.open {
    display: flex; flex-direction: column; align-items: flex-start;
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: var(--white); padding: 6rem 2rem 2rem;
    gap: 1.75rem; z-index: 999; box-shadow: 4px 0 24px rgba(0,0,0,.1);
  }
  .nav-links.open a { font-size: 1.15rem; color: var(--dark) !important; }
  .nav-cta.open {
    display: flex; flex-direction: column; width: 100%;
    position: fixed; bottom: 2rem; left: 2rem; right: 2rem; z-index: 1000;
  }
}

/* ============================================================
   HERO
   ============================================================ */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark2) 45%, #1e0a0a 100%);
  padding-top: 80px;
}
.hero-bg-pattern {
  position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 15% 50%, rgba(139,26,26,.25) 0%, transparent 50%),
    radial-gradient(circle at 85% 20%, rgba(201,168,76,.15) 0%, transparent 40%),
    url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: .5rem;
  background: rgba(201,168,76,.15); border: 1px solid rgba(201,168,76,.4);
  color: var(--gold-light); padding: .4rem 1rem; border-radius: 50px;
  font-size: .8rem; font-weight: 600; margin-bottom: 1.25rem;
  letter-spacing: .05em; text-transform: uppercase;
}
.hero-content h1 {
  color: var(--white);
  margin-bottom: 1.25rem;
}
.hero-content h1 span { color: var(--gold); }
.hero-content p {
  color: rgba(255,255,255,.75);
  font-size: 1.1rem;
  margin-bottom: 2rem;
  max-width: 520px;
}
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }
.hero-stats {
  display: flex; gap: 2rem; margin-top: 3rem; padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,.12);
}
.stat-item .num { font-size: 1.8rem; font-weight: 800; color: var(--gold); }
.stat-item .lbl { font-size: .78rem; color: rgba(255,255,255,.55); margin-top: .15rem; }

/* Inquiry card */
.hero-form-card {
  background: rgba(255,255,255,.05);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
}
.hero-form-card h3 {
  color: var(--white);
  font-size: 1.3rem;
  margin-bottom: 1.5rem;
}
.hero-form-card h3 span { color: var(--gold); }
.form-group { margin-bottom: 1rem; }
.form-group label {
  display: block; font-size: .78rem; font-weight: 600;
  color: rgba(255,255,255,.6); margin-bottom: .35rem; text-transform: uppercase; letter-spacing: .04em;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%; padding: .7rem 1rem;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 8px;
  color: var(--white);
  font-size: .9rem;
  transition: border-color .2s;
  font-family: inherit;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: rgba(255,255,255,.35); }
.form-group select option { background: var(--dark2); color: var(--white); }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--gold);
  background: rgba(255,255,255,.12);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; }
.form-success {
  display: none;
  text-align: center;
  padding: 2rem;
  color: var(--white);
}
.form-success .check {
  width: 64px; height: 64px;
  background: rgba(46,204,113,.2);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 1rem;
  font-size: 2rem;
}
.form-success h3 { color: var(--gold); margin-bottom: .5rem; }
.form-success p { color: rgba(255,255,255,.7); font-size: .9rem; }

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-form-card { order: -1; }
  .hero-stats { gap: 1.25rem; }
}

/* ============================================================
   SERVICES SECTION
   ============================================================ */
#services { background: var(--bg-light); }
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.75rem;
}
.service-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow);
  transition: all .3s;
  border: 1px solid transparent;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--gold));
  transform: scaleX(0); transition: transform .3s;
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--border); }
.service-card:hover::before { transform: scaleX(1); }
.service-icon {
  width: 64px; height: 64px;
  background: linear-gradient(135deg, rgba(139,26,26,.1), rgba(201,168,76,.15));
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.75rem;
  margin-bottom: 1.25rem;
}
.service-card h3 { font-size: 1.1rem; margin-bottom: .6rem; color: var(--dark); }
.service-card p { font-size: .875rem; color: var(--text-light); line-height: 1.65; }
.service-card .learn-more {
  display: inline-flex; align-items: center; gap: .35rem;
  color: var(--primary); font-weight: 600; font-size: .8rem;
  margin-top: 1rem;
  transition: gap .2s;
}
.service-card:hover .learn-more { gap: .6rem; }

/* ============================================================
   HOW IT WORKS
   ============================================================ */
#how-it-works { background: var(--white); }
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  position: relative;
}
.step-card {
  text-align: center;
  padding: 2rem 1.5rem;
  border-radius: var(--radius);
  background: var(--bg-cream);
  border: 1px solid var(--border);
  position: relative;
}
.step-num {
  width: 48px; height: 48px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: var(--white);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 1.1rem;
  margin: 0 auto 1rem;
}
.step-card h3 { font-size: 1rem; margin-bottom: .5rem; }
.step-card p { font-size: .85rem; color: var(--text-light); }

/* ============================================================
   SUBJECTS / DISCIPLINES
   ============================================================ */
#subjects { background: var(--dark); }
#subjects .section-title h2 { color: var(--white); }
#subjects .section-title p { color: rgba(255,255,255,.6); }
.subjects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 1rem;
}
.subject-chip {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 50px;
  padding: .65rem 1.25rem;
  text-align: center;
  color: rgba(255,255,255,.8);
  font-size: .85rem;
  font-weight: 500;
  transition: all .2s;
  cursor: default;
}
.subject-chip:hover {
  background: rgba(201,168,76,.15);
  border-color: var(--gold);
  color: var(--gold-light);
}

/* ============================================================
   WHY CHOOSE US
   ============================================================ */
#why-us { background: var(--bg-cream); }
.why-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.why-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.why-image img {
  width: 100%; height: 420px; object-fit: cover; border-radius: var(--radius-lg);
  display: block;
}
.why-image-badge {
  position: absolute; bottom: 1.5rem; left: 1.5rem;
  background: var(--primary);
  color: var(--white);
  padding: 1rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: .85rem;
}
.why-image-badge .big { font-size: 1.75rem; display: block; color: var(--gold-light); }
.features-list { display: flex; flex-direction: column; gap: 1.25rem; margin-top: 1.5rem; }
.feature-item {
  display: flex; gap: 1rem; align-items: flex-start;
}
.feature-icon {
  width: 44px; height: 44px; flex-shrink: 0;
  background: linear-gradient(135deg, var(--primary), var(--gold));
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; color: var(--white);
}
.feature-text h4 { font-size: .95rem; margin-bottom: .25rem; }
.feature-text p { font-size: .82rem; color: var(--text-light); }
@media (max-width: 768px) {
  .why-inner { grid-template-columns: 1fr; }
}

/* ============================================================
   TESTIMONIALS
   ============================================================ */
#testimonials { background: var(--white); }
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}
.testi-card {
  background: var(--bg-light);
  border-radius: var(--radius);
  padding: 1.75rem;
  border-left: 4px solid var(--primary);
  position: relative;
}
.testi-card .quote-icon {
  font-size: 3rem; color: var(--primary); opacity: .2;
  position: absolute; top: 1rem; right: 1.25rem;
  line-height: 1;
}
.testi-text { font-size: .9rem; color: var(--text); line-height: 1.7; margin-bottom: 1rem; font-style: italic; }
.testi-author { display: flex; align-items: center; gap: .75rem; }
.testi-avatar {
  width: 42px; height: 42px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--gold));
  display: flex; align-items: center; justify-content: center;
  color: var(--white); font-weight: 700; font-size: 1rem;
}
.testi-info .name { font-weight: 700; font-size: .9rem; }
.testi-info .role { font-size: .78rem; color: var(--text-light); }
.stars { color: var(--gold); font-size: .85rem; margin-bottom: .4rem; }

/* ============================================================
   CTA BANNER
   ============================================================ */
#cta-banner {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  padding: 5rem 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
#cta-banner::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(circle at 30% 50%, rgba(201,168,76,.2) 0%, transparent 60%);
}
#cta-banner h2 { color: var(--white); position: relative; margin-bottom: 1rem; }
#cta-banner p { color: rgba(255,255,255,.75); margin-bottom: 2rem; position: relative; max-width: 500px; margin-inline: auto; margin-bottom: 2rem; }
#cta-banner .actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; position: relative; }

/* ============================================================
   CONTACT SECTION (WeChat + Facebook + form)
   ============================================================ */
#contact { background: var(--bg-light); }
.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 3rem;
  align-items: start;
}
.contact-info h3 { margin-bottom: 1rem; }
.contact-info p { color: var(--text-light); margin-bottom: 1.5rem; }
.contact-channels { display: flex; flex-direction: column; gap: 1rem; }
.channel-card {
  display: flex; align-items: center; gap: 1rem;
  background: var(--white);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  box-shadow: 0 2px 12px rgba(0,0,0,.07);
  border: 1px solid var(--border);
  transition: all .2s;
}
.channel-card:hover { transform: translateX(4px); border-color: var(--primary); }
.channel-icon {
  width: 48px; height: 48px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; flex-shrink: 0;
}
.channel-icon.wechat { background: #07c160; }
.channel-icon.facebook { background: #1877f2; }
.channel-icon.email { background: var(--primary); }
.channel-icon span { font-size: 1.5rem; }
.channel-text .ch-label { font-size: .72rem; color: var(--text-light); font-weight: 600; text-transform: uppercase; letter-spacing: .05em; }
.channel-text .ch-val { font-weight: 600; font-size: .9rem; color: var(--dark); }
.wechat-qr {
  margin-top: 1.5rem;
  background: var(--white);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}
.wechat-qr img { max-width: 160px; border-radius: 8px; }
.wechat-qr p { font-size: .8rem; color: var(--text-light); margin-top: .5rem; }

/* Contact form panel */
.contact-form-panel {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}
.contact-form-panel h3 { margin-bottom: 1.5rem; color: var(--dark); }
.contact-form-panel .form-group label { color: var(--text); }
.contact-form-panel input,
.contact-form-panel select,
.contact-form-panel textarea {
  width: 100%; padding: .75rem 1rem;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-family: inherit; font-size: .9rem;
  color: var(--text);
  transition: border-color .2s;
  background: var(--white);
}
.contact-form-panel input:focus,
.contact-form-panel select:focus,
.contact-form-panel textarea:focus {
  outline: none; border-color: var(--primary);
}
.contact-form-panel textarea { resize: vertical; min-height: 100px; }
.msg-success, .msg-error {
  padding: .9rem 1.25rem;
  border-radius: 8px;
  font-size: .875rem;
  font-weight: 600;
  display: none;
  margin-bottom: 1rem;
}
.msg-success { background: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
.msg-error { background: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }
@media (max-width: 768px) {
  .contact-inner { grid-template-columns: 1fr; }
}

/* ============================================================
   FOOTER
   ============================================================ */
footer {
  background: var(--dark);
  color: rgba(255,255,255,.7);
  padding: 3.5rem 0 1.5rem;
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}
.footer-brand .logo-wrap { display: flex; align-items: center; gap: .75rem; margin-bottom: 1rem; }
.footer-brand img { height: 44px; }
.footer-brand .brand-name { font-size: 1rem; font-weight: 700; color: var(--white); }
.footer-brand .brand-sub { font-size: .7rem; color: var(--gold); }
.footer-brand p { font-size: .85rem; line-height: 1.65; }
.footer-social { display: flex; gap: .75rem; margin-top: 1.25rem; }
.social-btn {
  width: 38px; height: 38px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,.08);
  font-size: 1rem; transition: all .2s;
}
.social-btn:hover { background: var(--primary); }
.footer-col h4 { color: var(--white); font-size: .9rem; margin-bottom: 1rem; }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: .6rem; }
.footer-col ul a { font-size: .82rem; transition: color .2s; }
.footer-col ul a:hover { color: var(--gold-light); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding-top: 1.5rem;
  display: flex; justify-content: space-between; align-items: center;
  font-size: .78rem; flex-wrap: wrap; gap: .75rem;
}
.footer-bottom a { color: var(--gold); }
@media (max-width: 768px) {
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .footer-inner { grid-template-columns: 1fr; }
}

/* ============================================================
   PAGE HERO (inner pages)
   ============================================================ */
.page-hero {
  background: linear-gradient(135deg, var(--dark) 0%, var(--primary-dark) 100%);
  padding: 7rem 0 4rem;
  text-align: center;
  color: var(--white);
}
.page-hero h1 { color: var(--white); margin-bottom: .75rem; }
.page-hero p { color: rgba(255,255,255,.7); font-size: 1.05rem; }
.breadcrumb {
  display: flex; gap: .5rem; align-items: center; justify-content: center;
  font-size: .8rem; margin-bottom: 1rem; color: rgba(255,255,255,.5);
}
.breadcrumb a { color: var(--gold); }

/* ============================================================
   UTILITIES
   ============================================================ */
.text-center { text-align: center; }
.text-gold { color: var(--gold); }
.text-primary { color: var(--primary); }
.mt-1 { margin-top: .5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-3 { margin-bottom: 1.5rem; }

/* Scroll progress bar */
#scroll-progress {
  position: fixed; top: 0; left: 0; height: 3px; z-index: 9999;
  background: linear-gradient(90deg, var(--primary), var(--gold));
  width: 0%; transition: width .1s;
}

/* Back to top */
#back-to-top {
  position: fixed; bottom: 2rem; right: 2rem;
  width: 46px; height: 46px; border-radius: 50%;
  background: var(--primary);
  color: var(--white);
  border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
  box-shadow: 0 4px 16px rgba(139,26,26,.4);
  opacity: 0; pointer-events: none;
  transition: all .3s; z-index: 900;
}
#back-to-top.show { opacity: 1; pointer-events: all; }
#back-to-top:hover { background: var(--primary-dark); transform: translateY(-2px); }

/* Loading spinner */
.spinner {
  width: 18px; height: 18px;
  border: 2px solid rgba(255,255,255,.35);
  border-top-color: var(--white);
  border-radius: 50%;
  animation: spin .6s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Fade-in animation */
.fade-in { opacity: 0; transform: translateY(24px); transition: opacity .6s, transform .6s; }
.fade-in.visible { opacity: 1; transform: none; }

/* WhatsApp-style floating button */
.float-wechat {
  position: fixed; bottom: 5rem; right: 2rem; z-index: 900;
  width: 52px; height: 52px; border-radius: 50%;
  background: #07c160;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem;
  box-shadow: 0 4px 16px rgba(7,193,96,.5);
  cursor: pointer; transition: transform .2s;
  text-decoration: none;
}
.float-wechat:hover { transform: scale(1.1); }