/* =============================================
   HowardAI_Studio — Shared Stylesheet
   Theme: Dark Enterprise / Modern SaaS
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Noto+Sans+TC:wght@300;400;500;700&display=swap');

/* --- Variables --- */
:root {
  --bg-primary:    #0B0F1A;
  --bg-secondary:  #111827;
  --bg-card:       #161D2E;
  --bg-card-hover: #1E2840;
  --accent-blue:   #4F8CFF;
  --accent-purple: #7A5CFF;
  --accent-glow:   rgba(79,140,255,0.15);
  --text-primary:  #F9FAFB;
  --text-secondary:#9CA3AF;
  --text-muted:    #6B7280;
  --border:        rgba(255,255,255,0.07);
  --border-accent: rgba(79,140,255,0.3);
  --gradient:      linear-gradient(135deg, #4F8CFF 0%, #7A5CFF 100%);
  --gradient-text: linear-gradient(135deg, #4F8CFF, #A78BFA);
  --radius:        12px;
  --radius-lg:     20px;
  --shadow:        0 4px 24px rgba(0,0,0,0.4);
  --shadow-glow:   0 0 40px rgba(79,140,255,0.12);
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: 'Inter', 'Noto Sans TC', system-ui, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent-blue); text-decoration: none; transition: color .2s; }
a:hover { color: #7AAFFF; }

img { max-width: 100%; display: block; }

/* --- Utility --- */
.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.container-sm { max-width: 780px; margin: 0 auto; padding: 0 24px; }

.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: 8px;
  font-size: .95rem; font-weight: 600; cursor: pointer;
  border: none; transition: all .2s; white-space: nowrap;
}
.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 4px 20px rgba(79,140,255,0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(79,140,255,0.45);
  color: #fff;
}
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-accent);
}
.btn-outline:hover {
  background: var(--accent-glow);
  color: var(--text-primary);
  border-color: var(--accent-blue);
}
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  padding: 10px 22px;
}
.btn-ghost:hover { color: var(--text-primary); border-color: rgba(255,255,255,0.2); }

.badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px; border-radius: 99px;
  font-size: .78rem; font-weight: 600; letter-spacing: .04em; text-transform: uppercase;
  background: rgba(79,140,255,0.12); border: 1px solid rgba(79,140,255,0.25);
  color: var(--accent-blue);
}

.section-label {
  font-size: .78rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase;
  color: var(--accent-blue); margin-bottom: 12px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color .2s, box-shadow .2s, transform .2s;
}
.card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
  transform: translateY(-3px);
}

.tag {
  display: inline-block;
  padding: 3px 10px; border-radius: 99px;
  font-size: .72rem; font-weight: 600;
  background: rgba(122,92,255,0.15); color: #A78BFA;
  border: 1px solid rgba(122,92,255,0.25);
}

/* --- Navigation --- */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(11,15,26,0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.nav-logo {
  font-size: 1.1rem; font-weight: 800; letter-spacing: -.02em;
  color: var(--text-primary); display: flex; align-items: center; gap: 8px;
}
.nav-logo span { background: var(--gradient); -webkit-background-clip: text;
  -webkit-text-fill-color: transparent; background-clip: text; }
.nav-links { display: flex; align-items: center; gap: 8px; }
.nav-links a {
  padding: 7px 14px; border-radius: 7px;
  font-size: .88rem; font-weight: 500; color: var(--text-secondary);
  transition: all .15s;
}
.nav-links a:hover { color: var(--text-primary); background: rgba(255,255,255,0.05); }
.nav-links a.active { color: var(--accent-blue); }
.nav-cta { display: flex; align-items: center; gap: 12px; }

.nav-hamburger {
  display: none; flex-direction: column; gap: 5px; cursor: pointer;
  background: none; border: none; padding: 8px;
}
.nav-hamburger span { display: block; width: 22px; height: 2px; background: var(--text-secondary); border-radius: 2px; transition: all .2s; }

.nav-mobile { display: none; }
.nav-mobile.open {
  display: flex; flex-direction: column; padding: 12px 24px 20px;
  border-top: 1px solid var(--border);
}
.nav-mobile a {
  padding: 11px 12px; font-size: .95rem; font-weight: 500;
  color: var(--text-secondary); border-radius: 8px;
}
.nav-mobile a:hover { color: var(--text-primary); background: rgba(255,255,255,0.05); }
.nav-mobile .btn { margin-top: 8px; width: 100%; justify-content: center; }

/* --- Hero --- */
.hero {
  padding: 96px 0 80px;
  background: radial-gradient(ellipse 80% 60% at 50% -10%, rgba(79,140,255,0.12) 0%, transparent 70%);
}
.hero-inner {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 64px; align-items: center;
}
.hero-tag { margin-bottom: 20px; }
.hero h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 800; line-height: 1.15; letter-spacing: -.03em;
  margin-bottom: 20px;
}
.hero-sub {
  font-size: 1.05rem; color: var(--text-secondary);
  line-height: 1.75; margin-bottom: 36px;
}
.hero-sub-zh {
  font-family: 'Noto Sans TC', sans-serif;
  font-size: .95rem; color: var(--text-muted);
  margin-top: 10px; line-height: 1.8;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-visual { position: relative; }

/* Mock notification card */
.mock-alert-window {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow), var(--shadow-glow);
  position: relative; overflow: hidden;
}
.mock-alert-window::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--gradient);
}
.mock-title-bar {
  display: flex; align-items: center; gap: 8px;
  margin-bottom: 16px;
}
.mock-dot { width: 10px; height: 10px; border-radius: 50%; }
.mock-dot.red   { background: #FF5F57; }
.mock-dot.yellow{ background: #FFBC2E; }
.mock-dot.green { background: #28CA41; }
.mock-alert-title { font-size: .78rem; color: var(--text-muted); margin-left: 8px; }

.alert-item {
  display: flex; gap: 12px; align-items: flex-start;
  padding: 12px; border-radius: 10px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  margin-bottom: 10px;
}
.alert-item:last-child { margin-bottom: 0; }
.alert-icon {
  width: 36px; height: 36px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; flex-shrink: 0;
}
.alert-icon.critical { background: rgba(239,68,68,0.15); }
.alert-icon.warning  { background: rgba(245,158,11,0.15); }
.alert-icon.info     { background: rgba(79,140,255,0.15); }
.alert-text { flex: 1; min-width: 0; }
.alert-text strong { display: block; font-size: .82rem; font-weight: 600; color: var(--text-primary); }
.alert-text span   { font-size: .74rem; color: var(--text-secondary); }
.alert-badge {
  font-size: .65rem; font-weight: 700; padding: 2px 8px; border-radius: 99px; flex-shrink: 0; align-self: flex-start; margin-top: 2px;
}
.alert-badge.critical { background: rgba(239,68,68,0.15); color: #F87171; border: 1px solid rgba(239,68,68,0.2); }
.alert-badge.warning  { background: rgba(245,158,11,0.15); color: #FCD34D; border: 1px solid rgba(245,158,11,0.2); }
.alert-badge.info     { background: rgba(79,140,255,0.15); color: #93C5FD; border: 1px solid rgba(79,140,255,0.2); }

.mock-line-notify {
  margin-top: 14px; padding: 14px;
  background: #00B900; border-radius: 10px;
  display: flex; align-items: center; gap: 10px;
}
.mock-line-notify .line-icon { font-size: 1.3rem; }
.mock-line-text { font-size: .78rem; color: #fff; font-weight: 500; }
.mock-line-text small { display: block; opacity: .75; font-size: .7rem; }

.mock-flow-arrow {
  text-align: center; color: var(--text-muted); font-size: .8rem;
  padding: 6px 0; display: flex; align-items: center; justify-content: center; gap: 6px;
}

/* --- Section Blocks --- */
.section { padding: 88px 0; }
.section-alt { background: var(--bg-secondary); }
.section-header { text-align: center; margin-bottom: 56px; }
.section-header h2 {
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  font-weight: 800; letter-spacing: -.03em; margin-bottom: 14px;
}
.section-header p {
  font-size: 1.05rem; color: var(--text-secondary);
  max-width: 560px; margin: 0 auto; line-height: 1.75;
}

/* --- Grid Layouts --- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }

/* --- Problem Cards --- */
.problem-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: all .2s;
}
.problem-card:hover { border-color: rgba(239,68,68,0.3); box-shadow: 0 0 30px rgba(239,68,68,0.07); }
.problem-card .icon { font-size: 1.8rem; margin-bottom: 14px; }
.problem-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.problem-card p  { font-size: .88rem; color: var(--text-secondary); line-height: 1.65; }

/* --- Solution Cards --- */
.solution-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: all .2s;
}
.solution-card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}
.solution-card .icon-box {
  width: 48px; height: 48px; border-radius: 12px;
  background: rgba(79,140,255,0.12); border: 1px solid rgba(79,140,255,0.2);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; margin-bottom: 20px;
}
.solution-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; }
.solution-card p  { font-size: .88rem; color: var(--text-secondary); line-height: 1.65; }

/* --- How It Works --- */
.steps { display: flex; gap: 0; align-items: flex-start; position: relative; }
.steps::before {
  content: '';
  position: absolute; top: 32px; left: 10%; right: 10%; height: 2px;
  background: linear-gradient(90deg, var(--border), var(--border-accent), var(--border));
}
.step {
  flex: 1; text-align: center; position: relative; padding: 0 16px;
}
.step-num {
  width: 64px; height: 64px; border-radius: 50%;
  background: var(--bg-card); border: 2px solid var(--border-accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; margin: 0 auto 20px;
  position: relative; z-index: 1;
}
.step h3 { font-size: .95rem; font-weight: 700; margin-bottom: 8px; }
.step p  { font-size: .82rem; color: var(--text-secondary); line-height: 1.6; }
.step-sub { font-size: .75rem; color: var(--text-muted); margin-top: 4px; }

/* --- Use Cases --- */
.usecase-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: all .2s;
}
.usecase-card:hover { border-color: var(--border-accent); box-shadow: var(--shadow-glow); transform: translateY(-3px); }
.usecase-card .role-tag {
  display: inline-block; margin-bottom: 14px;
  padding: 4px 12px; border-radius: 99px;
  font-size: .75rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase;
}
.usecase-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 10px; }
.usecase-card p  { font-size: .88rem; color: var(--text-secondary); line-height: 1.7; }
.usecase-card ul { margin-top: 14px; padding-left: 0; list-style: none; }
.usecase-card ul li {
  font-size: .84rem; color: var(--text-secondary);
  padding: 4px 0; display: flex; gap: 8px; align-items: flex-start;
}
.usecase-card ul li::before { content: '✓'; color: var(--accent-blue); font-weight: 700; flex-shrink: 0; }

.role-ciso { background: rgba(79,140,255,0.12); color: #93C5FD; border: 1px solid rgba(79,140,255,0.2); }
.role-soc  { background: rgba(122,92,255,0.12); color: #C4B5FD; border: 1px solid rgba(122,92,255,0.2); }
.role-it   { background: rgba(16,185,129,0.12); color: #6EE7B7; border: 1px solid rgba(16,185,129,0.2); }

/* --- Pricing Card --- */
.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  transition: all .2s;
  display: flex; flex-direction: column;
}
.pricing-card.featured {
  border-color: var(--accent-blue);
  box-shadow: 0 0 40px rgba(79,140,255,0.15), inset 0 1px 0 rgba(255,255,255,0.05);
  position: relative;
}
.pricing-card.featured::before {
  content: 'Most Popular';
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  background: var(--gradient); color: #fff;
  font-size: .72rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
  padding: 4px 18px; border-radius: 99px;
}
.pricing-name { font-size: .8rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: var(--text-secondary); margin-bottom: 10px; }
.pricing-price { font-size: 2.8rem; font-weight: 800; line-height: 1; letter-spacing: -.04em; margin-bottom: 6px; }
.pricing-price sup { font-size: 1.4rem; font-weight: 600; vertical-align: super; }
.pricing-period { font-size: .82rem; color: var(--text-secondary); margin-bottom: 4px; }
.pricing-period-zh { font-size: .78rem; color: var(--text-muted); margin-bottom: 24px; }
.pricing-divider { border: none; border-top: 1px solid var(--border); margin: 20px 0; }
.pricing-features { list-style: none; flex: 1; margin-bottom: 28px; }
.pricing-features li {
  display: flex; gap: 10px; align-items: flex-start;
  font-size: .88rem; padding: 7px 0; color: var(--text-secondary);
  border-bottom: 1px solid rgba(255,255,255,0.03);
}
.pricing-features li:last-child { border-bottom: none; }
.pricing-features li .check { color: var(--accent-blue); font-weight: 700; flex-shrink: 0; margin-top: 1px; }
.pricing-features li .cross { color: var(--text-muted); font-weight: 700; flex-shrink: 0; margin-top: 1px; }
.pricing-card .btn { width: 100%; justify-content: center; margin-top: auto; }

/* One-time product card */
.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex; flex-direction: column;
  transition: all .2s;
}
.product-card:hover { border-color: var(--border-accent); box-shadow: var(--shadow-glow); transform: translateY(-3px); }
.product-price { font-size: 1.8rem; font-weight: 800; margin: 10px 0; }
.product-price sup { font-size: 1rem; font-weight: 600; }
.product-deliverables { list-style: none; margin: 14px 0; }
.product-deliverables li {
  font-size: .84rem; color: var(--text-secondary);
  padding: 5px 0; display: flex; gap: 8px;
}
.product-deliverables li::before { content: '▸'; color: var(--accent-purple); }

/* --- About / Trust --- */
.trust-points { display: flex; gap: 24px; flex-wrap: wrap; justify-content: center; }
.trust-point {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 20px; border-radius: 10px;
  background: var(--bg-card); border: 1px solid var(--border);
  font-size: .9rem; font-weight: 500;
}
.trust-point span:first-child { font-size: 1.2rem; }

/* --- CTA Section --- */
.cta-section {
  text-align: center;
  background: radial-gradient(ellipse 60% 80% at 50% 100%, rgba(79,140,255,0.1) 0%, transparent 70%);
  padding: 96px 0;
}
.cta-section h2 { font-size: clamp(1.8rem, 3vw, 2.6rem); font-weight: 800; letter-spacing: -.03em; margin-bottom: 18px; }
.cta-section p   { font-size: 1.05rem; color: var(--text-secondary); margin-bottom: 36px; max-width: 520px; margin-left: auto; margin-right: auto; }
.cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* --- Footer --- */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 48px 0 32px;
}
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
.footer-brand p { font-size: .88rem; color: var(--text-secondary); margin-top: 10px; line-height: 1.65; max-width: 280px; }
.footer-col h4 { font-size: .8rem; font-weight: 700; text-transform: uppercase; letter-spacing: .07em; color: var(--text-muted); margin-bottom: 14px; }
.footer-col a  { display: block; font-size: .88rem; color: var(--text-secondary); padding: 4px 0; }
.footer-col a:hover { color: var(--text-primary); }
.footer-bottom {
  margin-top: 40px; padding-top: 20px;
  border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center;
  font-size: .8rem; color: var(--text-muted);
}
.footer-legal { display: flex; gap: 20px; }
.footer-legal a { color: var(--text-muted); }
.footer-legal a:hover { color: var(--text-secondary); }

/* --- Legal Pages --- */
.legal-hero { padding: 64px 0 40px; border-bottom: 1px solid var(--border); }
.legal-hero h1 { font-size: 2rem; font-weight: 800; letter-spacing: -.03em; margin-bottom: 8px; }
.legal-hero p  { font-size: .9rem; color: var(--text-secondary); }
.legal-body { padding: 48px 0 80px; }
.legal-body h2 { font-size: 1.15rem; font-weight: 700; margin: 36px 0 12px; padding-bottom: 8px; border-bottom: 1px solid var(--border); }
.legal-body h3 { font-size: .98rem; font-weight: 700; margin: 22px 0 8px; color: var(--text-secondary); }
.legal-body p  { font-size: .9rem; color: var(--text-secondary); margin-bottom: 14px; line-height: 1.8; }
.legal-body ul { padding-left: 20px; margin-bottom: 14px; }
.legal-body ul li { font-size: .9rem; color: var(--text-secondary); line-height: 1.8; margin-bottom: 6px; }
.legal-highlight {
  background: rgba(79,140,255,0.07); border: 1px solid rgba(79,140,255,0.15);
  border-radius: 10px; padding: 16px 20px; margin: 16px 0;
  font-size: .88rem; color: var(--text-secondary);
}

/* --- Divider --- */
.divider { height: 1px; background: var(--border); margin: 0; }

/* --- Pricing toggle (annual/monthly) --- */
.pricing-toggle {
  display: inline-flex; background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 10px; padding: 4px; gap: 4px; margin-bottom: 48px;
}
.toggle-btn {
  padding: 8px 20px; border-radius: 7px; font-size: .88rem; font-weight: 600;
  cursor: pointer; border: none; background: none; color: var(--text-secondary); transition: all .2s;
}
.toggle-btn.active { background: var(--gradient); color: #fff; }

/* --- Responsive --- */
@media (max-width: 1024px) {
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { order: -1; }
  .hero { padding: 64px 0 56px; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .steps { flex-direction: column; gap: 32px; }
  .steps::before { display: none; }
  .trust-points { flex-direction: column; }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .nav-links, .nav-cta { display: none; }
  .nav-hamburger { display: flex; }
  .section { padding: 60px 0; }
  .cta-section { padding: 64px 0; }
}

@media (max-width: 480px) {
  .grid-4 { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; }
  .cta-actions { flex-direction: column; align-items: center; }
}