/* ===== SGWolf 新加坡狼群 — Cold-Tone Landing Page ===== */
:root {
  --c-bg-darkest: #020617;
  --c-bg-dark: #0f172a;
  --c-bg-dark2: #1e293b;
  --c-bg-light: #f0f4f8;
  --c-bg-white: #ffffff;
  --c-primary: #3b82f6;
  --c-primary-light: #60a5fa;
  --c-primary-dark: #1d4ed8;
  --c-accent: #06b6d4;
  --c-accent-light: #22d3ee;
  --c-text-dark: #1e293b;
  --c-text-light: #e2e8f0;
  --c-text-muted: #94a3b8;
  --c-border: #334155;
  --c-border-light: #cbd5e1;
  --c-card-dark: rgba(30,41,59,.65);
  --c-card-light: rgba(255,255,255,.85);
  --radius: 14px;
  --shadow: 0 8px 32px rgba(0,0,0,.12);
  --shadow-dark: 0 8px 32px rgba(0,0,0,.35);
  --transition: .3s ease;
  --max-w: 1200px;
}
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--c-text-dark);
  background: var(--c-bg-light);
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; transition: color var(--transition), opacity var(--transition); }
.container { width: 92%; max-width: var(--max-w); margin: 0 auto; }

/* ===== NAV ===== */
.nav {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
  background: rgba(15,23,42,.92);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(59,130,246,.15);
  transition: background var(--transition);
}
.nav .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 56px;
}
.nav-brand {
  display: flex; align-items: center; gap: 10px; color: var(--c-text-light);
  font-weight: 700; font-size: 1.4rem; line-height: 56px;
}
.nav-brand img { width: 32px; height: 32px; border-radius: 6px; }
.nav-links {
  display: flex; align-items: center; gap: 24px; height: 56px;
}
.nav-links a {
  color: var(--c-text-muted); font-size: 1.1rem; font-weight: 500;
  line-height: 56px; transition: color var(--transition);
}
.nav-links a:hover { color: var(--c-primary-light); }
.mobile-toggle {
  display: none; background: none; border: 1px solid var(--c-border);
  color: var(--c-text-light); font-size: 1.4rem; padding: 4px 10px;
  border-radius: 6px; cursor: pointer;
}
.mobile-menu {
  display: none; flex-direction: column; gap: 8px;
  padding: 16px 0;
}
.mobile-menu a {
  color: var(--c-text-light); padding: 10px 0; font-size: .95rem;
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.mobile-menu.open { display: flex; }

/* ===== BTN ===== */
.btn-primary, .btn-outline {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 12px 28px; border-radius: 10px;
  font-size: .95rem; font-weight: 600;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  cursor: pointer; white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  color: #fff; border: none;
  box-shadow: 0 4px 20px rgba(59,130,246,.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(59,130,246,.5);
}
.btn-outline {
  background: transparent;
  color: var(--c-primary-light);
  border: 1.5px solid var(--c-primary);
}
.btn-outline:hover {
  background: rgba(59,130,246,.1);
  transform: translateY(-2px);
}
/* light-bg variants */
.section--light .btn-outline { color: var(--c-primary-dark); border-color: var(--c-primary-dark); }
.section--light .btn-outline:hover { background: rgba(29,78,216,.08); }

/* ===== HERO ===== */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: var(--c-bg-dark);
  overflow: hidden; padding: 80px 0 60px;
}
.hero-bg {
  position: absolute; inset: 0;
  background: url('../img/hero-bg.png') center/cover no-repeat;
  opacity: .45; z-index: 0;
}
.hero-particles {
  position: absolute; inset: 0; z-index: 2; pointer-events: none;
}
.hero-particles span {
  position: absolute; border-radius: 50%;
  background: rgba(59,130,246,.15);
  animation: float 8s infinite ease-in-out;
}
.hero-particles span:nth-child(1) { width: 300px; height: 300px; top: -80px; left: -60px; animation-delay: 0s; }
.hero-particles span:nth-child(2) { width: 200px; height: 200px; bottom: 10%; right: 5%; animation-delay: 2s; }
.hero-particles span:nth-child(3) { width: 120px; height: 120px; top: 40%; left: 60%; animation-delay: 4s; }
.hero-particles span:nth-child(4) { width: 160px; height: 160px; bottom: 30%; left: 15%; animation-delay: 1s; }
@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); opacity: .4; }
  50% { transform: translateY(-30px) scale(1.08); opacity: .7; }
}
.hero-content {
  position: relative; z-index: 3; text-align: center;
  max-width: 800px; margin: 0 auto;
}
.hero-badge {
  display: inline-block; padding: 6px 18px; border-radius: 20px;
  background: rgba(59,130,246,.15); border: 1px solid rgba(59,130,246,.3);
  color: var(--c-primary-light); font-size: .85rem; font-weight: 600;
  margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 800;
  color: #fff; line-height: 1.25; margin-bottom: 12px;
}
.hero .en-sub {
  font-size: clamp(1rem, 2.5vw, 1.25rem); color: var(--c-text-muted);
  font-weight: 400; margin-bottom: 20px;
}
.hero-desc {
  color: var(--c-text-light); font-size: 1.02rem; line-height: 1.8;
  margin-bottom: 32px; opacity: .88;
}
.hero-desc a { color: var(--c-accent-light); border-bottom: 1px solid rgba(222, 230, 232, 0.3); }
.hero-desc a:hover { color: #fff; }
.hero-btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero-scroll {
  position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%); z-index: 3;
}
.hero-scroll span {
  display: block; width: 24px; height: 38px;
  border: 2px solid rgba(255,255,255,.3); border-radius: 12px;
  position: relative;
}
.hero-scroll span::after {
  content: ''; display: block; width: 4px; height: 8px;
  background: var(--c-primary-light); border-radius: 2px;
  position: absolute; top: 6px; left: 50%; transform: translateX(-50%);
  animation: scrollPulse 1.6s infinite;
}
@keyframes scrollPulse {
  0% { opacity: 1; transform: translateX(-50%) translateY(0); }
  100% { opacity: 0; transform: translateX(-50%) translateY(14px); }
}

/* ===== TRUST BAR ===== */
.trust-bar {
  background: var(--c-primary-dark);
  padding: 16px 0; overflow: hidden;
}
.trust-items {
  display: flex; gap: 32px; justify-content: center; flex-wrap: wrap;
  color: rgba(255,255,255,.85); font-size: .88rem; font-weight: 500;
}
.trust-item { display: flex; align-items: center; gap: 6px; white-space: nowrap; }

/* ===== SECTION COMMON ===== */
.section--dark { background: var(--c-bg-dark); color: var(--c-text-light); }
.section--light { background: var(--c-bg-light); color: var(--c-text-dark); }
.section--dark a { color: var(--c-accent-light); }
.section--dark a:hover { color: #fff; }
.section--light a { color: var(--c-primary-dark); }
.section--light a:hover { color: var(--c-bg-dark); }
section { padding: 80px 0; }
.section-header { text-align: center; margin-bottom: 50px; }
.section-header h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem); font-weight: 700;
  margin-bottom: 12px;
}
.section-header .en-label {
  font-size: .95rem; font-weight: 400; opacity: .65; display: block; margin-top: 4px;
}
.section-header p {
  max-width: 680px; margin: 0 auto; font-size: 1rem; opacity: .78; line-height: 1.8;
}

/* ===== ABOUT ===== */
.about-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center;
}
.about-img {
  border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow-dark);
}
.about-img img { width: 100%; height: 380px; object-fit: cover; }
.about-text h2 { margin-bottom: 18px; }
.about-text h2 .en { font-size: .7em; font-weight: 400; opacity: .6; }
.about-text p { margin-bottom: 14px; line-height: 1.85; }
.about-text .en-p { font-size: .92rem; opacity: .7; font-style: italic; }
.about-link {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 10px; font-weight: 600;
}

/* ===== ADVANTAGES ===== */
.adv-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.adv-card {
  background: var(--c-card-dark);
  border: 1px solid rgba(59,130,246,.12);
  border-radius: var(--radius); padding: 30px 24px;
  transition: transform var(--transition), border-color var(--transition);
}
.adv-card:hover {
  transform: translateY(-4px);
  border-color: rgba(59,130,246,.35);
}
.adv-icon {
  font-size: 2rem; margin-bottom: 14px; display: block;
}
.adv-card h3 { font-size: 1.1rem; margin-bottom: 10px; }
.adv-card .en-t { font-size: .82rem; opacity: .55; font-weight: 400; }
.adv-card p { font-size: .92rem; opacity: .78; line-height: 1.75; }

/* ===== AREAS ===== */
.areas-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.area-card {
  background: var(--c-card-light);
  border: 1px solid var(--c-border-light);
  border-radius: var(--radius); padding: 24px;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}
.area-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 36px rgba(0,0,0,.08);
}
.area-icon { font-size: 2.2rem; margin-bottom: 10px; }
.area-card h3 { font-size: 1.05rem; margin-bottom: 6px; }
.area-card p { font-size: .93rem; opacity: .75; line-height: 1.7; }
.area-map {
  margin-top: 40px; border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow);
}
.area-map img { width: 100%; height: 320px; object-fit: cover; }

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--c-border-light);
  border-radius: 10px; margin-bottom: 12px;
  overflow: hidden; background: var(--c-bg-white);
}
.faq-question {
  padding: 18px 24px; cursor: pointer; font-weight: 600;
  display: flex; justify-content: space-between; align-items: center;
  font-size: .98rem; transition: background var(--transition);
}
.faq-question::after {
  content: '+'; font-size: 1.3rem; font-weight: 300;
  color: var(--c-primary); transition: transform var(--transition);
}
.faq-item.open .faq-question::after { content: '−'; }
.faq-question:hover { background: rgba(59,130,246,.04); }
.faq-answer {
  max-height: 0; overflow: hidden;
  padding: 0 24px; font-size: .93rem; line-height: 1.8;
  transition: max-height .35s ease, padding .35s ease;
  opacity: .78;
}
.faq-item.open .faq-answer {
  max-height: 400px; padding: 0 24px 20px;
}

/* ===== CTA BANNER ===== */
.cta-banner {
  background: linear-gradient(135deg, var(--c-primary-dark), var(--c-bg-dark));
  padding: 72px 0; text-align: center; color: var(--c-text-light);
}
.cta-banner h2 { font-size: clamp(1.4rem, 3vw, 2rem); margin-bottom: 14px; }
.cta-banner p { opacity: .78; margin-bottom: 28px; max-width: 600px; margin-left: auto; margin-right: auto; }
.cta-banner .btn-group { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ===== FOOTER ===== */
.footer {
  background: var(--c-bg-darkest);
  color: var(--c-text-muted); padding: 60px 0 30px;
  border-top: 1px solid rgba(59,130,246,.1);
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 36px;
  margin-bottom: 40px;
}
.footer-brand h3 { color: var(--c-text-light); font-size: 1.2rem; margin-bottom: 10px; }
.footer-brand p { font-size: .88rem; line-height: 1.75; }
.footer-col h4 {
  color: var(--c-text-light); font-size: .95rem; margin-bottom: 14px;
  text-transform: uppercase; letter-spacing: 1px;
}
.footer-col a {
  display: block; color: var(--c-text-muted); font-size: .88rem;
  padding: 4px 0; transition: color var(--transition);
}
.footer-col a:hover { color: var(--c-primary-light); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.06);
  padding-top: 24px; text-align: center; font-size: .82rem;
}
.footer-bottom a { color: var(--c-text-muted); }
.footer-bottom a:hover { color: var(--c-primary-light); }
.footer-disclaimer {
  margin-top: 14px; font-size: .78rem; opacity: .5; max-width: 720px;
  margin-left: auto; margin-right: auto; line-height: 1.7;
}
.footer-badges {
  display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px;
}
.footer-badge {
  display: inline-block; padding: 4px 12px; border-radius: 16px;
  background: rgba(59,130,246,.12); border: 1px solid rgba(59,130,246,.25);
  color: var(--c-primary-light); font-size: .75rem; font-weight: 500;
  white-space: nowrap;
}
.footer-keywords {
  border-top: 1px solid rgba(255,255,255,.06);
  border-bottom: 1px solid rgba(255,255,255,.06);
  padding: 16px 0; margin-bottom: 24px; text-align: center;
}
.footer-keywords p {
  font-size: .78rem; opacity: .35; letter-spacing: .5px; line-height: 1.8;
}

/* ===== STATS BAR ===== */
.stats-bar {
  background: var(--c-bg-dark2);
  padding: 48px 0;
  border-top: 1px solid rgba(59,130,246,.12);
}
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
  text-align: center;
}
.stat-item {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
}
.stat-icon {
  font-size: 2rem; margin-bottom: 4px;
}
.stat-number {
  font-size: clamp(2rem, 4vw, 2.8rem); font-weight: 800;
  color: var(--c-primary-light);
  line-height: 1.1;
}
.stat-label {
  font-size: .85rem; color: var(--c-text-muted); font-weight: 500;
}

/* ===== WHY CHOOSE ===== */
.why-grid {
  display: flex; flex-direction: column; gap: 24px;
  max-width: 800px; margin: 0 auto;
}
.why-item {
  display: flex; gap: 24px; align-items: flex-start;
  background: var(--c-card-dark);
  border: 1px solid rgba(59,130,246,.12);
  border-radius: var(--radius);
  padding: 28px 30px;
  transition: transform var(--transition), border-color var(--transition);
}
.why-item:hover {
  transform: translateX(6px);
  border-color: rgba(59,130,246,.35);
}
.why-num {
  font-size: 2rem; font-weight: 800;
  color: var(--c-primary); opacity: .4;
  flex-shrink: 0; line-height: 1;
  min-width: 50px;
}
.why-content h3 {
  font-size: 1.08rem; margin-bottom: 8px; color: var(--c-text-light);
}
.why-content p {
  font-size: .93rem; opacity: .78; line-height: 1.8;
}


/* ===== REVEAL ANIMATION ===== */
.reveal {
  opacity: 0; transform: translateY(30px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-left {
  opacity: 0; transform: translateX(-40px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal-left.visible { opacity: 1; transform: translateX(0); }
.reveal-right {
  opacity: 0; transform: translateX(40px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal-right.visible { opacity: 1; transform: translateX(0); }

/* ===== Language Switch ===== */
.lang-switch { display: flex; align-items: center; gap: 4px; margin-left: 12px; }
.lang-switch a { padding: 4px 12px; border-radius: 6px; font-size: .8rem; font-weight: 600; color: var(--c-text-muted); opacity: .5; transition: all .2s; text-decoration: none; }
.lang-switch a.active { opacity: 1; background: var(--c-primary); color: #fff; }
.lang-switch a:hover { opacity: .85; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .areas-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 28px; }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .mobile-toggle { display: block; }
  .nav .container { position: relative; }
  .about-grid { grid-template-columns: 1fr; }
  .about-img img { height: 260px; }
  .adv-grid { grid-template-columns: 1fr; }
  .areas-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .hero h1 { font-size: 1.7rem; }
  .hero-btns { flex-direction: column; align-items: center; }
  .btn-primary, .btn-outline { width: 100%; max-width: 280px; text-align: center; }
  section { padding: 56px 0; }
  .section-header h2 { font-size: 1.4rem; }
  .trust-items { gap: 16px; font-size: .8rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .why-item { flex-direction: column; gap: 12px; }
  .why-num { font-size: 1.5rem; }
}
@media (max-width: 480px) {
  .areas-grid { grid-template-columns: 1fr; }
  .hero { padding: 70px 0 50px; }
  .hero-badge { font-size: .75rem; }
  .trust-items { justify-content: flex-start; overflow-x: auto; padding-bottom: 4px; }
}