:root {
  --bg: #f5f5f5;
  --bg-elevated: #ffffff;
  --surface: #ffffff;
  --surface-hover: #fafafa;
  --ink: #222222;
  --muted: #666666;
  --primary: #ff6600;
  --primary-hover: #ff8533;
  --primary-dim: #e55a00;
  --primary-glow: rgba(255, 102, 0, 0.12);
  --accent: #1677ff;
  --border: #e8e8e8;
  --border-strong: #d9d9d9;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.08);
  --radius: 8px;
  --radius-lg: 12px;
  --header-dark: #222222;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Noto Sans SC", "Noto Sans TC", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
}

.icon-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.container {
  width: min(1200px, calc(100% - 2.5rem));
  margin: 0 auto;
}

/* ── Top bar ── */
.top-bar {
  background: var(--header-dark);
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.8rem;
  padding: 0.4rem 0;
}

.top-bar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.top-bar a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
}

.top-bar a:hover {
  color: var(--primary);
}

/* ── Header ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: #fff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 6px;
  background: var(--primary);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 0.85rem;
  letter-spacing: -0.02em;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.brand-text strong {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--ink);
}

.brand-text span {
  font-size: 0.75rem;
  color: var(--muted);
}

.main-nav {
  display: flex;
  gap: 0.15rem;
}

.main-nav a {
  color: var(--ink);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  padding: 0.45rem 0.9rem;
  border-radius: 4px;
  transition: color 0.2s, background 0.2s;
}

.main-nav a:hover {
  color: var(--primary);
  background: var(--primary-glow);
}

.lang-toggle {
  border: 1px solid var(--border-strong);
  background: #fff;
  color: var(--primary);
  border-radius: 4px;
  padding: 0.38rem 0.7rem;
  font-weight: 600;
  font-size: 0.82rem;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
  flex-shrink: 0;
}

.lang-toggle:hover {
  border-color: var(--primary);
  background: var(--primary-glow);
}

/* ── Hero ── */
.hero {
  position: relative;
  padding: 3.5rem 0 3rem;
  background: linear-gradient(180deg, #fff 0%, #fafafa 100%);
  border-bottom: 1px solid var(--border);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 2.5rem;
  align-items: center;
}

.eyebrow {
  display: inline-block;
  color: var(--primary);
  margin: 0 0 0.85rem;
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  background: var(--primary-glow);
  padding: 0.25rem 0.7rem;
  border-radius: 4px;
}

h1,
h2,
h3 {
  color: var(--ink);
  line-height: 1.3;
}

h1 {
  margin: 0;
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

h1 em {
  font-style: normal;
  color: var(--primary);
}

h2 {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 700;
  margin: 0 0 0.5rem;
}

.hero-desc {
  max-width: 54ch;
  color: var(--muted);
  font-size: 1rem;
  margin-top: 1rem;
}

.hero-search {
  display: flex;
  margin-top: 1.75rem;
  max-width: 520px;
  border: 2px solid var(--primary);
  border-radius: 6px;
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow);
}

.hero-search input {
  flex: 1;
  border: none;
  padding: 0.85rem 1rem;
  font-size: 0.95rem;
  outline: none;
  font-family: inherit;
  color: var(--ink);
}

.hero-search input::placeholder {
  color: #aaa;
}

.hero-search button {
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 0 1.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.2s;
  font-family: inherit;
  white-space: nowrap;
}

.hero-search button:hover {
  background: var(--primary-hover);
}

.hero-cta {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.25rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  border-radius: 6px;
  padding: 0.7rem 1.3rem;
  font-weight: 600;
  font-size: 0.9rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

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

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-ghost {
  border-color: var(--border-strong);
  color: var(--ink);
  background: #fff;
}

.btn-ghost:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.hero-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-lg);
}

.hero-card h3 {
  margin: 0 0 1rem;
  font-size: 0.95rem;
  color: var(--primary);
  font-weight: 700;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--primary);
}

.hero-card ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.hero-card li {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  border-bottom: 1px solid var(--border);
  padding: 0.8rem 0;
}

.hero-card li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.hero-card span {
  color: var(--muted);
  font-size: 0.85rem;
}

.hero-card strong {
  text-align: right;
  font-size: 0.9rem;
  color: var(--ink);
}

/* ── Stats strip ── */
.stats-strip {
  background: var(--primary);
  padding: 1.75rem 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  text-align: center;
}

.stat-item strong {
  display: block;
  font-size: 1.7rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
}

.stat-item span {
  display: block;
  margin-top: 0.2rem;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.85);
}

/* ── Trust ── */
.trust {
  padding: 3.5rem 0;
  background: #fff;
}

.trust-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, 1fr);
}

.card,
.service-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem;
  transition: box-shadow 0.2s, border-color 0.2s;
}

.card:hover,
.service-item:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
}

.icon-badge {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  border: none;
  color: var(--primary);
  background: var(--primary-glow);
  display: grid;
  place-items: center;
  margin-bottom: 0.75rem;
}

.icon {
  width: 22px;
  height: 22px;
}

.card p,
.service-item p {
  color: var(--muted);
  margin: 0.4rem 0 0;
  font-size: 0.9rem;
}

.card h3,
.service-item h3 {
  margin: 0;
  font-size: 1.05rem;
}

/* ── Sections ── */
.section {
  padding: 4rem 0;
}

.alt {
  background: #fff;
}

.section-intro {
  color: var(--muted);
  margin: 0 0 2rem;
  max-width: 62ch;
  font-size: 0.95rem;
}

.section-header {
  margin-bottom: 2rem;
}

.section-header h2 {
  margin-bottom: 0.5rem;
}

.section-header h2::after {
  content: "";
  display: block;
  width: 40px;
  height: 3px;
  background: var(--primary);
  margin-top: 0.5rem;
  border-radius: 2px;
}

/* ── Product bento ── */
.product-bento {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1rem;
}

.bento-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem;
  position: relative;
  overflow: hidden;
  transition: box-shadow 0.2s, border-color 0.2s, transform 0.2s;
}

.bento-item:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.bento-item.col-4 { grid-column: span 4; }
.bento-item.col-6 { grid-column: span 6; }

.bento-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-glow);
  padding: 0.15rem 0.5rem;
  border-radius: 3px;
  margin-bottom: 0.5rem;
}

.bento-item h3 {
  margin: 0 0 0.4rem;
  font-size: 1.1rem;
}

.bento-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.bento-list {
  margin: 0.75rem 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.bento-list li {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.2rem 0.5rem;
  font-size: 0.78rem;
  color: var(--muted);
}

.service-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, 1fr);
}

/* ── Feature / scope ── */
.feature-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, 1fr);
}

.feature-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.feature-item:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
}

.feature-item h3 {
  margin: 0;
  font-size: 1rem;
  color: var(--ink);
}

.feature-item h3::before {
  content: "▸ ";
  color: var(--primary);
}

.feature-item p {
  margin: 0.35rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

/* ── Process steps ── */
.steps-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, 1fr);
  counter-reset: step;
}

.step-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.3rem;
  position: relative;
}

.step-item::after {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 2rem;
  font-weight: 800;
  color: rgba(255, 102, 0, 0.1);
  line-height: 1;
}

.step-num {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: var(--primary-glow);
  color: var(--primary);
  display: grid;
  place-items: center;
  margin-bottom: 0.75rem;
}

.step-num .icon {
  width: 18px;
  height: 18px;
}

.step-item h3 {
  margin: 0;
  font-size: 1rem;
}

.step-item p {
  margin: 0.4rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

/* ── Tags ── */
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.tag {
  background: #fff;
  border: 1px solid var(--border-strong);
  border-radius: 4px;
  padding: 0.5rem 1rem;
  font-weight: 500;
  font-size: 0.88rem;
  color: var(--ink);
  transition: border-color 0.2s, background 0.2s, color 0.2s;
}

.tag:hover {
  border-color: var(--primary);
  background: var(--primary-glow);
  color: var(--primary);
}

/* ── Why grid ── */
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.card-like {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem;
}

.card-like h3 {
  margin: 0;
  font-size: 1rem;
}

.card-like p {
  margin: 0.4rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.wide-span {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, #fff 0%, rgba(255, 102, 0, 0.04) 100%);
  border-color: rgba(255, 102, 0, 0.2);
}

.bullets {
  margin: 0.5rem 0 0;
  padding-left: 1.1rem;
  color: var(--muted);
}

.bullets li {
  margin: 0.35rem 0;
  font-size: 0.9rem;
}

.bullets li::marker {
  color: var(--primary);
}

/* ── Partners ── */
.partners-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, 1fr);
}

/* ── About info ── */
.info-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.info-grid > div {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.2rem;
}

.info-grid .wide {
  grid-column: 1 / -1;
}

.info-grid span {
  display: block;
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.03em;
}

.info-grid strong {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.95rem;
}

/* ── Contact ── */
.contact-wrap {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 2rem;
}

.contact-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
}

.contact-list li {
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.contact-list li:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.contact-list span {
  display: block;
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.03em;
}

.contact-list strong {
  display: block;
  margin-top: 0.25rem;
}

.contact-list a {
  color: var(--primary);
  text-decoration: none;
}

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

.contact-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.contact-check {
  margin-top: 2rem;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem;
}

.contact-check h3 {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
  color: var(--primary);
}

.contact-sidecard {
  background: linear-gradient(160deg, #fff 0%, rgba(255, 102, 0, 0.05) 100%);
  border: 1px solid rgba(255, 102, 0, 0.2);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  height: fit-content;
}

.contact-sidecard h3 {
  margin: 0;
  color: var(--primary);
}

.contact-sidecard p {
  margin: 0.75rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  color: var(--muted);
  background: var(--header-dark);
  font-size: 0.85rem;
}

.footer-wrap {
  text-align: center;
}

.footer-wrap p {
  margin: 0;
  color: rgba(255, 255, 255, 0.7);
}

.footer-wrap .footer-brand {
  color: #fff;
  font-weight: 600;
}

/* ── Responsive ── */
@media (max-width: 960px) {
  .hero-grid,
  .contact-wrap {
    grid-template-columns: 1fr;
  }

  .main-nav {
    display: none;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .trust-grid,
  .service-grid,
  .info-grid,
  .feature-grid,
  .steps-grid,
  .why-grid,
  .partners-grid {
    grid-template-columns: 1fr;
  }

  .product-bento {
    grid-template-columns: 1fr;
  }

  .bento-item.col-4,
  .bento-item.col-6 {
    grid-column: span 1;
  }

  .info-grid .wide,
  .wide-span {
    grid-column: auto;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }

  .stat-item strong {
    font-size: 1.4rem;
  }

  .hero-search {
    flex-direction: column;
    border: 1px solid var(--border);
  }

  .hero-search input {
    border-bottom: 1px solid var(--border);
  }

  .hero-search button {
    padding: 0.75rem;
  }
}