:root {
  --navy: #10233f;
  --navy-light: #17335a;
  --teal: #1c8c7c;
  --teal-light: #e6f4f1;
  --ink: #1b2430;
  --ink-soft: #4c5a6b;
  --bg: #ffffff;
  --bg-alt: #f6f8fa;
  --border: #e3e8ee;
  --radius: 10px;
  --max-width: 960px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg { max-width: 100%; }

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* language toggle: default zh visible, en hidden */
[data-lang="zh"] .lang-en { display: none; }
[data-lang="en"] .lang-zh { display: none; }

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: saturate(180%) blur(6px);
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 14px;
  padding-bottom: 14px;
  flex-wrap: wrap;
}

.brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--navy);
  text-decoration: none;
  white-space: nowrap;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-links {
  display: none;
}

@media (min-width: 720px) {
  .nav-links {
    display: flex;
    gap: 20px;
    margin-right: 8px;
  }
  .nav-links a {
    color: var(--ink-soft);
    text-decoration: none;
    font-size: 0.95rem;
  }
  .nav-links a:hover { color: var(--navy); }
}

.lang-toggle {
  border: 1px solid var(--navy);
  background: transparent;
  color: var(--navy);
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
}

.lang-toggle:hover { background: var(--navy); color: #fff; }

/* hero */
.hero {
  padding: 56px 0 44px;
  background: linear-gradient(180deg, var(--teal-light), #ffffff 70%);
}

.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--teal);
  background: rgba(28, 140, 124, 0.1);
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 14px;
}

.hero h1 {
  font-size: clamp(1.7rem, 4.5vw, 2.5rem);
  line-height: 1.35;
  margin: 0 0 16px;
  color: var(--navy);
}

.hero p.lead {
  font-size: 1.05rem;
  color: var(--ink-soft);
  max-width: 640px;
  margin: 0 0 26px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--teal);
  color: #fff;
}
.btn-primary:hover { background: #157466; }

.btn-secondary {
  background: transparent;
  color: var(--navy);
  border-color: var(--navy);
}
.btn-secondary:hover { background: var(--navy); color: #fff; }

/* sections */
section { padding: 52px 0; }
section + section { border-top: 1px solid var(--border); }

.section-title {
  font-size: clamp(1.3rem, 3vw, 1.7rem);
  color: var(--navy);
  margin: 0 0 8px;
}

.section-sub {
  color: var(--ink-soft);
  margin: 0 0 32px;
  max-width: 680px;
}

/* case cards */
.cases-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 720px) {
  .cases-grid { grid-template-columns: repeat(3, 1fr); }
}

.case-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  background: var(--bg-alt);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.case-card h3 {
  margin: 0;
  font-size: 1.08rem;
  color: var(--navy);
}

.case-block h4 {
  margin: 0 0 4px;
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--teal);
}

.case-block p, .case-block ul {
  margin: 0;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.case-block ul { padding-left: 18px; }
.case-block li { margin-bottom: 4px; }

.case-audience {
  margin-top: auto;
  font-size: 0.85rem;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
}

/* services */
.service-scope {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin-bottom: 28px;
}

.service-scope h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  color: var(--navy);
}

.not-included ul {
  margin: 0;
  padding-left: 18px;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.not-included li { margin-bottom: 6px; }

.delivery-steps {
  counter-reset: step;
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

@media (min-width: 640px) {
  .delivery-steps { grid-template-columns: repeat(2, 1fr); }
}

.delivery-steps li {
  counter-increment: step;
  position: relative;
  padding: 14px 16px 14px 44px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.delivery-steps li::before {
  content: counter(step);
  position: absolute;
  left: 12px;
  top: 12px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--teal);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* pricing */
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: 8px;
}

@media (min-width: 720px) {
  .pricing-grid { grid-template-columns: repeat(3, 1fr); }
}

.price-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.price-card.featured {
  border-color: var(--teal);
  box-shadow: 0 0 0 1px var(--teal);
}

.price-tier {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--teal);
}

.price-amount {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--navy);
}

.price-time {
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.price-desc {
  font-size: 0.9rem;
  color: var(--ink-soft);
  margin: 0;
}

.pricing-note {
  margin-top: 22px;
  font-size: 0.88rem;
  color: var(--ink-soft);
  background: var(--bg-alt);
  border-radius: 8px;
  padding: 14px 16px;
}

/* contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

@media (min-width: 720px) {
  .contact-grid { grid-template-columns: 1fr 1.2fr; }
}

.contact-info a {
  color: var(--teal);
  font-weight: 600;
  text-decoration: none;
  word-break: break-all;
}

.contact-info a:hover { text-decoration: underline; }

.contact-note {
  font-size: 0.88rem;
  color: var(--ink-soft);
  margin-top: 16px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.form-row label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 6px;
}

.form-row input,
.form-row select,
.form-row textarea {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--ink);
  background: #fff;
}

.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  outline: 2px solid var(--teal);
  outline-offset: 1px;
}

.form-row textarea { resize: vertical; min-height: 110px; }

.form-status {
  font-size: 0.85rem;
  color: var(--teal);
  min-height: 1.2em;
}

/* footer */
.site-footer {
  padding: 28px 0 40px;
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.85rem;
}