/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: #1a1a2e;
  background: #fff;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* ===== TOKENS ===== */
:root {
  --primary: #FF6B35;
  --primary-dark: #e85520;
  --primary-light: #fff3ee;
  --accent: #2563eb;
  --dark: #1a1a2e;
  --mid: #4b5563;
  --light: #f9fafb;
  --border: #e5e7eb;
  --radius: 16px;
  --shadow: 0 4px 24px rgba(0,0,0,.08);
  --shadow-lg: 0 12px 48px rgba(0,0,0,.12);
}

/* ===== LAYOUT ===== */
.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.section-pad { padding: 96px 0; }
.text-center { text-align: center; }

/* ===== NAV ===== */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex; align-items: center; gap: 32px;
  height: 68px;
}
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.2rem; color: var(--dark); }
.logo-icon { font-size: 1.4rem; }
.logo-text { background: linear-gradient(135deg, #FF6B35, #e85520); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.nav-links { display: flex; gap: 8px; margin-left: auto; }
.nav-links a {
  padding: 8px 14px; border-radius: 8px; font-size: .92rem; font-weight: 500; color: var(--mid);
  transition: all .2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--primary); background: var(--primary-light); }
.nav-cta {
  background: var(--primary); color: #fff; border: none; border-radius: 10px;
  padding: 10px 20px; font-size: .92rem; font-weight: 600; cursor: pointer;
  transition: background .2s; white-space: nowrap;
}
.nav-cta:hover { background: var(--primary-dark); }
.hamburger {
  display: none; background: none; border: none; font-size: 1.5rem;
  cursor: pointer; color: var(--dark); margin-left: auto;
}
.mobile-menu {
  display: none; flex-direction: column; background: #fff;
  border-top: 1px solid var(--border); padding: 12px 24px 20px;
}
.mobile-menu a { padding: 12px 0; font-weight: 500; color: var(--mid); border-bottom: 1px solid var(--border); }
.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu.open { display: flex; }

/* ===== HERO ===== */
.hero {
  position: relative; overflow: hidden;
  background: linear-gradient(135deg, #fff9f6 0%, #fff 50%, #f0f6ff 100%);
  padding: 80px 0 100px;
}
.hero-bg-shape {
  position: absolute; top: -100px; right: -200px;
  width: 700px; height: 700px; border-radius: 50%;
  background: radial-gradient(circle, rgba(255,107,53,.08) 0%, transparent 70%);
  pointer-events: none;
}
.hero-inner { display: flex; align-items: center; gap: 64px; }
.hero-text { flex: 1; max-width: 580px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--primary-light); color: var(--primary);
  border: 1px solid rgba(255,107,53,.2);
  border-radius: 100px; padding: 6px 16px; font-size: .85rem; font-weight: 600;
  margin-bottom: 24px;
}
.hero-title { font-size: clamp(2rem, 4vw, 3rem); font-weight: 900; line-height: 1.15; color: var(--dark); margin-bottom: 20px; }
.hero-title .highlight { color: var(--primary); }
.hero-sub { font-size: 1.05rem; color: var(--mid); margin-bottom: 36px; max-width: 520px; }
.hero-cta-row { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--primary); color: #fff;
  border: none; border-radius: 12px;
  padding: 14px 24px; font-size: .95rem; font-weight: 700;
  cursor: pointer; transition: all .2s; box-shadow: 0 4px 16px rgba(255,107,53,.35);
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 6px 24px rgba(255,107,53,.45); }
.btn-primary.large { padding: 16px 36px; font-size: 1.05rem; }
.btn-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--dark); color: #fff;
  border: none; border-radius: 12px;
  padding: 14px 24px; font-size: .95rem; font-weight: 700;
  cursor: pointer; transition: all .2s;
}
.btn-secondary:hover { background: #2d2d45; transform: translateY(-2px); }
.hero-note { font-size: .85rem; color: #9ca3af; }

/* ===== PHONE MOCKUP ===== */
.hero-visual { position: relative; flex-shrink: 0; }
.phone-mockup {
  width: 260px; height: 520px;
  background: #1a1a2e;
  border-radius: 40px;
  padding: 16px;
  box-shadow: 0 32px 80px rgba(26,26,46,.35), 0 0 0 8px #fff, 0 0 0 10px #e5e7eb;
  position: relative;
}
.phone-screen {
  background: linear-gradient(160deg, #fff 0%, #f9fafb 100%);
  border-radius: 28px; height: 100%; padding: 24px 20px;
  display: flex; flex-direction: column; align-items: center; gap: 16px;
}
.screen-header { width: 100%; display: flex; justify-content: space-between; align-items: center; }
.screen-title { font-size: .8rem; font-weight: 700; color: var(--dark); }
.screen-dot { width: 8px; height: 8px; background: #22c55e; border-radius: 50%; }
.score-ring { position: relative; width: 140px; height: 140px; display: flex; align-items: center; justify-content: center; }
.ring-svg { position: absolute; top: 0; left: 0; width: 100%; height: 100%; transform: rotate(-90deg); }
.score-number { font-size: 2.2rem; font-weight: 900; color: var(--dark); line-height: 1; z-index: 1; }
.score-label { position: absolute; bottom: 14px; font-size: .75rem; font-weight: 600; color: var(--primary); z-index: 1; }
.screen-stats { width: 100%; display: flex; justify-content: space-around; }
.stat-item { display: flex; flex-direction: column; align-items: center; gap: 2px; }
.stat-val { font-size: .8rem; font-weight: 700; }
.stat-val.green { color: #16a34a; }
.stat-val.orange { color: var(--primary); }
.stat-key { font-size: .68rem; color: #9ca3af; }

/* Floating cards */
.floating-card {
  position: absolute;
  background: #fff; border-radius: 14px;
  padding: 12px 16px;
  box-shadow: var(--shadow-lg);
  display: flex; align-items: center; gap: 10px;
  font-size: .78rem; white-space: nowrap;
  animation: float 4s ease-in-out infinite;
}
.floating-card.card-1 { top: 60px; right: -80px; animation-delay: 0s; }
.floating-card.card-2 { bottom: 80px; left: -80px; animation-delay: 2s; }
.fc-icon { font-size: 1.2rem; }
.fc-text { color: var(--mid); line-height: 1.3; }
.fc-text b { color: var(--dark); }
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* ===== SECTION LABELS ===== */
.section-tag {
  display: inline-block;
  background: var(--primary-light); color: var(--primary);
  font-size: .75rem; font-weight: 700; letter-spacing: .08em;
  padding: 5px 14px; border-radius: 100px; margin-bottom: 16px;
}
.section-title { font-size: clamp(1.6rem, 3vw, 2.4rem); font-weight: 800; color: var(--dark); margin-bottom: 12px; }
.section-sub { font-size: 1.05rem; color: var(--mid); margin-bottom: 56px; }

/* ===== FEATURES ===== */
.features { background: var(--light); }
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card {
  background: #fff; border-radius: var(--radius); padding: 36px 28px;
  border: 1px solid var(--border); position: relative;
  transition: transform .25s, box-shadow .25s;
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.feature-card.featured {
  background: linear-gradient(135deg, #FF6B35, #e85520);
  color: #fff; border-color: transparent;
  box-shadow: 0 16px 48px rgba(255,107,53,.35);
}
.feature-card.featured h3,
.feature-card.featured .feat-en,
.feature-card.featured .feat-cn,
.feature-card.featured .feat-link { color: rgba(255,255,255,.92); }
.feature-card.featured .feat-link { color: #fff; font-weight: 700; }
.feat-badge {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: #1a1a2e; color: #fff;
  font-size: .72rem; font-weight: 700; padding: 4px 14px; border-radius: 100px;
  white-space: nowrap;
}
.feat-icon-wrap {
  width: 56px; height: 56px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center; margin-bottom: 20px;
}
.feat-icon-wrap.orange { background: var(--primary-light); color: var(--primary); }
.feat-icon-wrap.white { background: rgba(255,255,255,.25); color: #fff; }
.feature-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 10px; color: var(--dark); }
.feat-en { font-size: .9rem; color: var(--mid); margin-bottom: 6px; }
.feat-cn { font-size: .82rem; color: #9ca3af; margin-bottom: 20px; }
.feat-link { font-size: .88rem; font-weight: 600; color: var(--primary); }

/* ===== BENEFITS ===== */
.benefits-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.benefit-item {
  text-align: center; padding: 40px 24px;
  border-radius: var(--radius); border: 1px solid var(--border);
  transition: box-shadow .25s;
}
.benefit-item:hover { box-shadow: var(--shadow); }
.benefit-icon { font-size: 2.8rem; margin-bottom: 16px; }
.benefit-item h4 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; color: var(--dark); }
.benefit-item p { font-size: .9rem; color: var(--mid); margin-bottom: 6px; }
.benefit-cn { font-size: .82rem; color: #9ca3af; }

/* ===== HOW IT WORKS ===== */
.how-it-works { background: var(--light); }
.steps-row { display: flex; align-items: flex-start; justify-content: center; gap: 16px; flex-wrap: wrap; margin-bottom: 56px; }
.step { text-align: center; flex: 1; min-width: 180px; max-width: 220px; }
.step-num { font-size: .72rem; font-weight: 800; letter-spacing: .1em; color: var(--primary); margin-bottom: 12px; }
.step-icon {
  width: 80px; height: 80px; border-radius: 50%;
  background: var(--primary); color: #fff; font-size: 2rem;
  display: flex; align-items: center; justify-content: center; margin: 0 auto 16px;
  box-shadow: 0 8px 24px rgba(255,107,53,.3);
}
.step h4 { font-size: 1rem; font-weight: 700; color: var(--dark); margin-bottom: 4px; }
.step p { font-size: .85rem; color: var(--mid); }
.step-arrow { font-size: 1.8rem; color: var(--border); margin-top: 48px; }
.steps-cta { text-align: center; }

/* ===== PAGE HERO ===== */
.page-hero {
  background: linear-gradient(135deg, #fff9f6 0%, #fff 60%, #f0f6ff 100%);
  padding: 80px 0 64px; text-align: center;
  border-bottom: 1px solid var(--border);
}
.page-hero h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 900; color: var(--dark); margin-bottom: 14px; }
.page-hero p { font-size: 1rem; color: var(--mid); }

/* ===== ABOUT ===== */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; margin-bottom: 80px; }
.about-text-block h2 { font-size: 1.5rem; font-weight: 800; color: var(--dark); margin-bottom: 14px; }
.about-text-block .en { font-size: .95rem; color: var(--mid); margin-bottom: 12px; }
.about-text-block .cn { font-size: .88rem; color: #9ca3af; }

.score-explainer {
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center;
  background: var(--light); border-radius: 24px; padding: 56px 48px; margin-bottom: 64px;
}
.score-explainer-text h2 { font-size: 1.5rem; font-weight: 800; color: var(--dark); margin-bottom: 14px; }
.score-explainer-text .en { font-size: .95rem; color: var(--mid); margin-bottom: 10px; }
.score-explainer-text .cn { font-size: .88rem; color: #9ca3af; }

.score-bar-wrap { display: flex; border-radius: 12px; overflow: hidden; height: 64px; margin-bottom: 12px; }
.score-segment { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; font-size: .78rem; font-weight: 700; color: #fff; gap: 2px; }
.score-segment small { font-weight: 400; opacity: .85; }
.score-segment.poor { background: #ef4444; }
.score-segment.fair { background: #f97316; }
.score-segment.good { background: #eab308; }
.score-segment.excellent { background: #22c55e; }
.score-bar-note { font-size: .82rem; color: var(--mid); }

.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-box {
  background: var(--light); border-radius: var(--radius); padding: 32px 20px; text-align: center;
  border: 1px solid var(--border);
}
.stat-box.highlight-stat { background: var(--primary); color: #fff; border-color: transparent; }
.stat-big { font-size: 2.2rem; font-weight: 900; color: var(--dark); margin-bottom: 6px; }
.stat-box.highlight-stat .stat-big { color: #fff; }
.stat-desc { font-size: .82rem; color: var(--mid); }
.stat-box.highlight-stat .stat-desc { color: rgba(255,255,255,.8); }

/* ===== FAQ ===== */
.faq-container { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border); border-radius: var(--radius);
  margin-bottom: 16px; overflow: hidden; cursor: pointer;
  transition: box-shadow .2s;
}
.faq-item:hover { box-shadow: var(--shadow); }
.faq-q {
  padding: 20px 24px; display: flex; align-items: center; gap: 12px;
  background: #fff;
}
.faq-q span:first-child { font-weight: 700; font-size: .97rem; color: var(--dark); flex: 1; }
.faq-q-cn { font-size: .85rem; color: #9ca3af; font-weight: 400; }
.faq-arrow {
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--primary-light); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; font-weight: 700; flex-shrink: 0;
  transition: transform .25s;
}
.faq-item.open .faq-arrow { transform: rotate(45deg); }
.faq-a {
  display: none; padding: 0 24px 20px; background: #fafafa;
  border-top: 1px solid var(--border);
}
.faq-item.open .faq-a { display: block; padding-top: 16px; }
.faq-a p { font-size: .92rem; color: var(--mid); margin-bottom: 8px; }
.faq-a p:last-child { margin-bottom: 0; }
.faq-cta { background: var(--dark); }
.faq-cta h2 { color: #fff; font-size: 1.8rem; margin-bottom: 10px; }
.faq-cta p { color: rgba(255,255,255,.7); margin-bottom: 28px; }
.inline-btn { display: inline-flex; align-items: center; gap: 8px; }

/* ===== PRIVACY ===== */
.privacy-container { display: grid; grid-template-columns: 240px 1fr; gap: 64px; align-items: start; }
.privacy-toc {
  position: sticky; top: 88px;
  background: var(--light); border-radius: var(--radius); padding: 28px 24px;
  border: 1px solid var(--border);
}
.privacy-toc h3 { font-size: .9rem; font-weight: 700; color: var(--dark); margin-bottom: 14px; }
.privacy-toc ol { padding-left: 18px; display: flex; flex-direction: column; gap: 8px; }
.privacy-toc a { font-size: .85rem; color: var(--mid); transition: color .2s; }
.privacy-toc a:hover { color: var(--primary); }

.privacy-block { margin-bottom: 52px; }
.privacy-block h2 { font-size: 1.3rem; font-weight: 800; color: var(--dark); margin-bottom: 16px; padding-top: 8px; border-top: 2px solid var(--primary-light); }
.privacy-block h3 { font-size: 1rem; font-weight: 700; color: var(--dark); margin: 16px 0 8px; }
.privacy-block p { font-size: .92rem; color: var(--mid); margin-bottom: 10px; }
.privacy-block ul { padding-left: 20px; display: flex; flex-direction: column; gap: 8px; margin-bottom: 12px; }
.privacy-block li { font-size: .92rem; color: var(--mid); list-style: disc; }
.privacy-block a { color: var(--primary); text-decoration: underline; }
.privacy-highlight {
  background: var(--primary-light); border-left: 4px solid var(--primary);
  border-radius: 0 12px 12px 0; padding: 16px 20px; margin: 16px 0;
  font-size: .9rem; color: var(--dark);
}
.contact-card {
  background: var(--light); border-radius: var(--radius); padding: 28px 24px;
  border: 1px solid var(--border); margin: 16px 0;
  display: flex; flex-direction: column; gap: 8px;
}
.contact-card p { font-size: .92rem; color: var(--mid); margin: 0; }
.contact-card a { color: var(--primary); text-decoration: underline; }

/* ===== FOOTER ===== */
.footer { background: #0f1120; color: rgba(255,255,255,.75); padding: 64px 0 0; }
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; padding-bottom: 48px; }
.footer-brand .logo { margin-bottom: 12px; display: inline-flex; }
.footer-brand p { font-size: .88rem; max-width: 260px; color: rgba(255,255,255,.55); }
.footer-links, .footer-contact { display: flex; flex-direction: column; gap: 8px; }
.footer-links h5, .footer-contact h5 { color: #fff; font-size: .85rem; font-weight: 700; margin-bottom: 8px; }
.footer-links a { font-size: .88rem; color: rgba(255,255,255,.55); transition: color .2s; }
.footer-links a:hover { color: var(--primary); }
.footer-contact p { font-size: .85rem; color: rgba(255,255,255,.55); }
.footer-contact a { color: var(--primary); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 24px 0; font-size: .78rem; color: rgba(255,255,255,.35);
}
.footer-addr { margin-top: 4px; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .hero-visual { display: none; }
  .about-grid { grid-template-columns: 1fr; }
  .score-explainer { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .privacy-container { grid-template-columns: 1fr; }
  .privacy-toc { position: static; }
}

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .hamburger { display: block; }
  .features-grid, .benefits-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .steps-row { flex-direction: column; align-items: center; }
  .step-arrow { transform: rotate(90deg); margin: 0; }
  .faq-q-cn { display: none; }
  .section-pad { padding: 64px 0; }
  .hero { padding: 56px 0 72px; }
}

@media (max-width: 480px) {
  .hero-cta-row { flex-direction: column; }
  .stats-row { grid-template-columns: 1fr 1fr; }
}