/* =========================================================
   Clouding Media — Global Styles
   Inspired by step30.org/plan (bright, mission-driven, card-based)
   ========================================================= */

:root {
  /* Brand palette */
  --color-primary: #0B3D91;        /* deep blue */
  --color-primary-dark: #082b66;
  --color-primary-light: #1f5fc4;
  --color-accent: #14b8a6;         /* teal-green */
  --color-accent-dark: #0d8c7e;
  --color-warm: #f59e0b;           /* CTA highlight */

  --color-bg: #ffffff;
  --color-bg-soft: #f6f9fc;
  --color-bg-section: #eef4fb;
  --color-card: #ffffff;
  --color-border: #e3e8ef;

  --color-text: #0f172a;
  --color-text-soft: #475569;
  --color-text-muted: #6b7280;

  /* Type */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang TC',
               'Microsoft JhengHei', 'Noto Sans TC', Roboto, Helvetica, Arial, sans-serif;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;

  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 24px 60px rgba(11, 61, 145, 0.18);

  --container: 1200px;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--color-accent); }
h1, h2, h3, h4 { line-height: 1.2; margin: 0 0 .6em; color: var(--color-text); font-weight: 700; }
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.4rem); letter-spacing: -0.01em; }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1rem; color: var(--color-text-soft); }
section { padding: clamp(64px, 9vw, 120px) 0; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-weight: 600;
  font-size: 0.98rem;
  border-radius: 999px;
  cursor: pointer;
  border: 0;
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease;
  white-space: nowrap;
}
.btn-primary { background: var(--color-primary); color: #fff; box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--color-primary-dark); transform: translateY(-1px); box-shadow: var(--shadow-md); color: #fff; }
.btn-accent { background: var(--color-accent); color: #fff; box-shadow: var(--shadow-sm); }
.btn-accent:hover { background: var(--color-accent-dark); color: #fff; transform: translateY(-1px); }
.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}
.btn-outline:hover { background: var(--color-primary); color: #fff; }
.btn-ghost { background: transparent; color: var(--color-text); }
.btn-ghost:hover { color: var(--color-primary); }

/* =========================================================
   Header / Nav
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid rgba(15, 23, 42, 0.06);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--color-primary);
  font-size: 1.15rem;
}
.logo .logo-mark {
  width: 32px; height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  display: inline-block;
  box-shadow: 0 4px 14px rgba(11, 61, 145, 0.25);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 999px;
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.95rem;
  transition: background .2s ease, color .2s ease;
}
.nav-links a:hover { background: var(--color-bg-section); color: var(--color-primary); }
.nav-links a.active { color: var(--color-primary); background: var(--color-bg-section); }
.nav-cta { display: flex; gap: 10px; align-items: center; }
.lang-toggle {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  overflow: hidden;
  font-size: 0.85rem;
}
.lang-toggle button {
  background: transparent;
  border: 0;
  padding: 6px 12px;
  cursor: pointer;
  color: var(--color-text-muted);
  font-weight: 600;
}
.lang-toggle button.active {
  background: var(--color-primary);
  color: #fff;
}
.menu-toggle { display: none; background: transparent; border: 0; cursor: pointer; padding: 8px; }
.menu-toggle span { display: block; width: 24px; height: 2px; background: var(--color-text); margin: 5px 0; transition: .2s; }

@media (max-width: 880px) {
  .nav-links {
    position: absolute;
    top: 64px; left: 16px; right: 16px;
    flex-direction: column;
    align-items: stretch;
    background: #fff;
    padding: 12px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    display: none;
  }
  .nav-links.open { display: flex; }
  .menu-toggle { display: block; }
  .nav-links a { padding: 12px 16px; }
}

/* =========================================================
   Hero
   ========================================================= */
.hero {
  position: relative;
  padding: clamp(72px, 10vw, 140px) 0 clamp(56px, 7vw, 100px);
  background:
    radial-gradient(ellipse at 80% 0%, rgba(20, 184, 166, 0.12), transparent 55%),
    radial-gradient(ellipse at 0% 100%, rgba(11, 61, 145, 0.10), transparent 50%),
    var(--color-bg-soft);
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(20, 184, 166, 0.12);
  color: var(--color-accent-dark);
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  margin-bottom: 18px;
}
.hero h1 { margin-bottom: 18px; }
.hero h1 .accent {
  background: linear-gradient(120deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p.lead {
  font-size: 1.15rem;
  color: var(--color-text-soft);
  max-width: 560px;
  margin-bottom: 28px;
}
.hero-cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.hero-visual {
  position: relative;
  aspect-ratio: 4/5;
  border-radius: var(--radius-lg);
  background:
    linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
}
.hero-visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 20%, rgba(255,255,255,0.25), transparent 35%),
    radial-gradient(circle at 80% 80%, rgba(255,255,255,0.18), transparent 40%);
  pointer-events: none;
}
.hero-visual .visual-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 36px;
}
.hero-visual .visual-content .stat {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}
.hero-visual .visual-content .stat-label { opacity: 0.85; font-size: 1rem; }

@media (max-width: 880px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { max-width: 380px; margin: 0 auto; }
}

/* =========================================================
   Section helpers
   ========================================================= */
.section-soft { background: var(--color-bg-soft); }
.section-section { background: var(--color-bg-section); }
.section-dark { background: var(--color-primary); color: #fff; }
.section-dark h1, .section-dark h2, .section-dark h3 { color: #fff; }
.section-dark p { color: rgba(255,255,255,0.85); }

.section-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 56px;
}
.section-head .eyebrow {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent-dark);
  margin-bottom: 12px;
}
.section-head p { font-size: 1.05rem; }

/* =========================================================
   Feature grid (icons + text)
   ========================================================= */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.feature-card {
  background: var(--color-card);
  padding: 32px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(11, 61, 145, 0.2);
}
.feature-icon {
  width: 52px; height: 52px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(11,61,145,0.10), rgba(20,184,166,0.10));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 18px;
}
.feature-card h3 { margin-bottom: 8px; }
.feature-card p { margin: 0; font-size: 0.95rem; }
@media (max-width: 880px) {
  .features { grid-template-columns: 1fr; }
}

/* =========================================================
   Plan / Tier cards (step30 style)
   ========================================================= */
.plans {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}
.plan-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.plan-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.plan-card.featured {
  background: linear-gradient(160deg, var(--color-primary) 0%, #1d4f9c 100%);
  color: #fff;
  border-color: transparent;
  box-shadow: var(--shadow-lg);
}
.plan-card.featured h3,
.plan-card.featured .price,
.plan-card.featured li { color: #fff; }
.plan-card.featured p,
.plan-card.featured .price-period { color: rgba(255,255,255,0.78); }
.plan-card.featured .plan-features li::before {
  background: var(--color-accent);
}

.plan-badge {
  position: absolute;
  top: 18px; right: 18px;
  background: var(--color-accent);
  color: #fff;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.plan-card h3 { font-size: 1.4rem; margin-bottom: 6px; }
.plan-card .plan-tagline {
  color: var(--color-text-muted);
  font-size: 0.92rem;
  margin-bottom: 24px;
}
.plan-card .price {
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1;
}
.plan-card .price-period {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 6px;
  margin-bottom: 24px;
}
.plan-features {
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  flex-grow: 1;
}
.plan-features li {
  position: relative;
  padding: 8px 0 8px 28px;
  color: var(--color-text-soft);
  font-size: 0.95rem;
  border-bottom: 1px dashed rgba(15,23,42,0.07);
}
.plan-features li:last-child { border-bottom: 0; }
.plan-features li::before {
  content: '';
  position: absolute;
  left: 0; top: 14px;
  width: 18px; height: 18px;
  background: var(--color-accent);
  border-radius: 50%;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='white'><path d='M6.5 11l-3-3 1-1 2 2 4-4 1 1z'/></svg>");
  background-size: 14px 14px;
  background-position: center;
  background-repeat: no-repeat;
}
.plan-card.featured .plan-features li {
  border-bottom-color: rgba(255,255,255,0.15);
}
@media (max-width: 880px) {
  .plans { grid-template-columns: 1fr; }
}

/* =========================================================
   Process / Timeline
   ========================================================= */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  position: relative;
}
.process-step { position: relative; }
.process-step .step-num {
  display: inline-flex;
  align-items: center; justify-content: center;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  font-weight: 800;
  margin-bottom: 16px;
  font-size: 1.05rem;
}
.process-step h3 { margin-bottom: 8px; font-size: 1.1rem; }
.process-step p { font-size: 0.95rem; }
@media (max-width: 880px) {
  .process-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 540px) {
  .process-grid { grid-template-columns: 1fr; }
}

/* =========================================================
   Stats bar
   ========================================================= */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.stats-bar .stat-item .num {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(120deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stats-bar .stat-item .label {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-top: 6px;
}
@media (max-width: 700px) {
  .stats-bar { grid-template-columns: 1fr 1fr; }
}

/* =========================================================
   CTA banner
   ========================================================= */
.cta-banner {
  border-radius: var(--radius-lg);
  padding: clamp(40px, 6vw, 72px);
  background:
    radial-gradient(ellipse at 100% 0%, rgba(20, 184, 166, 0.5), transparent 50%),
    linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  text-align: center;
}
.cta-banner h2 { color: #fff; }
.cta-banner p { color: rgba(255,255,255,0.85); max-width: 640px; margin: 0 auto 28px; }

/* =========================================================
   Contact
   ========================================================= */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
.contact-info dl { display: grid; grid-template-columns: 90px 1fr; gap: 12px 18px; margin: 0 0 24px; }
.contact-info dt { color: var(--color-text-muted); font-weight: 600; }
.contact-info dd { margin: 0; color: var(--color-text); }

.contact-form .form-row { margin-bottom: 18px; }
.contact-form label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--color-text);
}
.contact-form input,
.contact-form textarea,
.contact-form select {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color .2s ease, box-shadow .2s ease;
  background: #fff;
  color: var(--color-text);
}
.contact-form input:focus,
.contact-form textarea:focus,
.contact-form select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(11, 61, 145, 0.10);
}
@media (max-width: 880px) {
  .contact-grid { grid-template-columns: 1fr; }
}

/* =========================================================
   Team / About blocks
   ========================================================= */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.about-img {
  border-radius: var(--radius-lg);
  aspect-ratio: 4/3;
  background:
    linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  box-shadow: var(--shadow-md);
}
.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.value-card {
  padding: 28px;
  background: var(--color-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}
.value-card .num {
  font-size: 2.4rem;
  font-weight: 800;
  background: linear-gradient(120deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 12px;
  display: block;
}
@media (max-width: 880px) {
  .about-grid, .values-grid { grid-template-columns: 1fr; }
}

/* =========================================================
   FAQ accordion
   ========================================================= */
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item {
  border-bottom: 1px solid var(--color-border);
  padding: 18px 0;
}
.faq-q {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  background: transparent;
  border: 0;
  padding: 6px 0;
  font-size: 1.05rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  color: var(--color-text);
  font-family: inherit;
}
.faq-q::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--color-accent);
  margin-left: 12px;
  transition: transform .2s ease;
}
.faq-item.open .faq-q::after { content: '–'; }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .25s ease;
  color: var(--color-text-soft);
}
.faq-item.open .faq-a {
  max-height: 400px;
  padding-top: 8px;
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
  background: #0a1830;
  color: rgba(255,255,255,0.78);
  padding: 64px 0 28px;
  font-size: 0.92rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 40px;
}
.footer-grid h4 {
  color: #fff;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin-bottom: 10px; }
.footer-grid a { color: rgba(255,255,255,0.78); }
.footer-grid a:hover { color: #fff; }
.footer-brand p { color: rgba(255,255,255,0.7); margin-top: 14px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  color: rgba(255,255,255,0.5);
  font-size: 0.85rem;
}
@media (max-width: 880px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

/* =========================================================
   Utilities
   ========================================================= */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

/* Bilingual text visibility — hide the inactive language */
html[lang="zh"] [data-lang="en"] { display: none !important; }
html[lang="en"] [data-lang="zh"] { display: none !important; }
/* Always show the language toggle buttons regardless of current lang */
html .lang-toggle button[data-lang] { display: inline-block !important; }

/* Smooth fade */
.fade-up { opacity: 0; transform: translateY(20px); transition: opacity .6s ease, transform .6s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }