/* WPS AI办公 — teal/cyan tech theme */
:root {
  --primary: #0d9488;
  --primary-dark: #0f766e;
  --primary-light: #14b8a6;
  --accent: #06b6d4;
  --ink: #0f172a;
  --muted: #475569;
  --line: #cbd5e1;
  --surface: #f0fdfa;
  --white: #ffffff;
  --shadow: 0 12px 40px rgba(13, 148, 136, 0.14);
  --radius: 14px;
  --max: 1120px;
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(ellipse 80% 50% at 10% -10%, rgba(20, 184, 166, 0.18), transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(6, 182, 212, 0.12), transparent 50%),
    linear-gradient(180deg, #f8fffe 0%, #f1f5f9 40%, #ecfeff 100%);
  line-height: 1.75;
  font-size: 16px;
}
img, svg { max-width: 100%; vertical-align: middle; }
a { color: var(--primary-dark); text-decoration: none; }
a:hover { color: var(--primary); text-decoration: underline; }
.container { width: min(100% - 2rem, var(--max)); margin-inline: auto; }

/* Nav — sticky underline active */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(13, 148, 136, 0.15);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 1rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--primary-dark);
  text-decoration: none;
}
.brand:hover { text-decoration: none; color: var(--primary); }
.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: grid;
  place-items: center;
  color: #fff;
}
.nav-links {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 0.25rem;
}
.nav-links a {
  display: block;
  padding: 0.55rem 0.9rem;
  color: var(--muted);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
.nav-links a:hover { color: var(--primary-dark); }
.nav-links a.active {
  color: var(--primary-dark);
  border-bottom-color: var(--primary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  border: none;
  cursor: pointer;
  font: inherit;
  font-weight: 600;
  border-radius: 10px;
  padding: 0.75rem 1.25rem;
  transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
}
.btn:hover { transform: translateY(-1px); }
.btn:disabled { opacity: 0.7; cursor: wait; transform: none; }
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: 0 6px 18px rgba(13, 148, 136, 0.35);
}
.btn-primary:hover { box-shadow: 0 10px 24px rgba(13, 148, 136, 0.45); }
.btn-secondary {
  background: #fff;
  color: var(--primary-dark);
  border: 1px solid rgba(13, 148, 136, 0.35);
}
.btn-secondary:hover { background: var(--surface); }
.btn-ghost {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.35);
}
.btn-block { width: 100%; }
.btn-sm { padding: 0.55rem 0.9rem; font-size: 0.92rem; }

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Hero — full-bleed left text + right panel */
.hero {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(120deg, rgba(15, 118, 110, 0.95) 0%, rgba(13, 148, 136, 0.88) 45%, rgba(6, 182, 212, 0.85) 100%),
    url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.06'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  color: #fff;
  padding: 4.5rem 0 4rem;
}
.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 80px;
  background: linear-gradient(transparent, rgba(248, 255, 254, 0.35));
  pointer-events: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2.5rem;
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero-copy h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.85rem, 3.5vw, 2.65rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
}
.hero-lead {
  margin: 0 0 1.5rem;
  font-size: 1.08rem;
  opacity: 0.95;
  max-width: 36em;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.hero-panel {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: var(--radius);
  padding: 1.5rem;
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow);
}
.hero-panel h2 {
  margin: 0 0 0.75rem;
  font-size: 1.2rem;
}
.hero-panel p {
  margin: 0 0 1rem;
  font-size: 0.95rem;
  opacity: 0.92;
}
.dl-stack { display: grid; gap: 0.65rem; }

/* Sections */
.section { padding: 3.75rem 0; }
.section-alt {
  background: linear-gradient(180deg, rgba(240, 253, 250, 0.85), rgba(236, 254, 255, 0.5));
}
.section-head { margin-bottom: 2rem; max-width: 46em; }
.section-head h2 {
  margin: 0 0 0.65rem;
  font-size: clamp(1.45rem, 2.4vw, 1.9rem);
  color: var(--primary-dark);
}
.section-head p { margin: 0; color: var(--muted); }

/* Capability bands — horizontal */
.bands { display: grid; gap: 1rem; }
.band {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 1.25rem;
  align-items: start;
  padding: 1.35rem 1.5rem;
  background: #fff;
  border-radius: var(--radius);
  border-left: 4px solid var(--primary);
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.04);
}
.band-icon {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  background: linear-gradient(145deg, #ccfbf1, #cffafe);
  display: grid;
  place-items: center;
  color: var(--primary-dark);
}
.band h3 { margin: 0 0 0.4rem; font-size: 1.15rem; }
.band p { margin: 0; color: var(--muted); }

/* Platform strip */
.platform-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}
.platform-card {
  background: #fff;
  border: 1px solid rgba(13, 148, 136, 0.18);
  border-radius: var(--radius);
  padding: 1.35rem 1.1rem;
  text-align: center;
  box-shadow: 0 6px 22px rgba(13, 148, 136, 0.08);
}
.platform-card .icon-wrap {
  width: 48px;
  height: 48px;
  margin: 0 auto 0.75rem;
  border-radius: 12px;
  background: var(--surface);
  display: grid;
  place-items: center;
  color: var(--primary-dark);
}
.platform-card h3 { margin: 0 0 0.35rem; font-size: 1.05rem; }
.platform-card p { margin: 0 0 0.9rem; font-size: 0.88rem; color: var(--muted); }

/* Feature essays 2-col */
.essay-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}
.essay {
  background: #fff;
  border-radius: var(--radius);
  padding: 1.75rem;
  border: 1px solid rgba(15, 118, 110, 0.12);
}
.essay h3 { margin: 0 0 0.75rem; color: var(--primary-dark); }
.essay p { margin: 0 0 0.9rem; color: var(--muted); }
.essay p:last-child { margin-bottom: 0; }

/* Quotes */
.quotes { display: grid; gap: 1.25rem; }
.quote {
  margin: 0;
  padding: 1.5rem 1.75rem;
  background: linear-gradient(90deg, rgba(13, 148, 136, 0.08), rgba(6, 182, 212, 0.05));
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.quote p { margin: 0 0 0.75rem; font-size: 1.05rem; color: var(--ink); }
.quote footer { color: var(--muted); font-size: 0.92rem; }

/* Stats bar */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  padding: 1.75rem;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--primary-dark), var(--primary) 55%, var(--accent));
  color: #fff;
  text-align: center;
  box-shadow: var(--shadow);
}
.stat strong {
  display: block;
  font-size: 1.75rem;
  letter-spacing: -0.02em;
}
.stat span { font-size: 0.9rem; opacity: 0.9; }

/* Comparison table */
.table-wrap {
  overflow-x: auto;
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: 0 4px 18px rgba(15, 23, 42, 0.04);
}
table.compare {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
}
.compare th, .compare td {
  padding: 0.95rem 1.1rem;
  text-align: left;
  border-bottom: 1px solid #e2e8f0;
}
.compare th {
  background: linear-gradient(180deg, #f0fdfa, #ecfeff);
  color: var(--primary-dark);
  font-weight: 700;
}
.compare tr:last-child td { border-bottom: none; }
.compare td:nth-child(2) { color: var(--primary-dark); font-weight: 600; }

/* FAQ static accordion */
.faq-list { display: grid; gap: 0.85rem; }
.faq-item {
  background: #fff;
  border: 1px solid rgba(13, 148, 136, 0.2);
  border-radius: var(--radius);
  padding: 1.15rem 1.35rem;
}
.faq-item h3 {
  margin: 0 0 0.55rem;
  font-size: 1.05rem;
  color: var(--primary-dark);
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}
.faq-item h3::before {
  content: "";
  flex: 0 0 8px;
  width: 8px;
  height: 8px;
  margin-top: 0.45rem;
  border-radius: 50%;
  background: var(--primary);
}
.faq-item p { margin: 0 0 0.65rem; color: var(--muted); }
.faq-item p:last-child { margin-bottom: 0; }

/* Page hero compact */
.page-hero {
  padding: 3rem 0 2rem;
  background: linear-gradient(135deg, rgba(13, 148, 136, 0.12), rgba(6, 182, 212, 0.08));
  border-bottom: 1px solid rgba(13, 148, 136, 0.12);
}
.page-hero h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  color: var(--primary-dark);
}
.page-hero p { margin: 0; color: var(--muted); max-width: 48em; }

/* Download zones */
.dl-main {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1.5rem;
  align-items: stretch;
}
.dl-zone, .info-panel {
  background: #fff;
  border-radius: var(--radius);
  padding: 1.75rem;
  border: 1px solid rgba(13, 148, 136, 0.15);
}
.steps { display: grid; gap: 1rem; counter-reset: step; }
.step {
  position: relative;
  padding: 1.15rem 1.15rem 1.15rem 3.5rem;
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid #e2e8f0;
}
.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 1rem;
  top: 1.15rem;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  font-size: 0.85rem;
  display: grid;
  place-items: center;
}
.step h3 { margin: 0 0 0.4rem; font-size: 1.05rem; }
.step p { margin: 0; color: var(--muted); }

.req-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.req-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 1.35rem;
  border-top: 3px solid var(--primary);
}
.req-card h3 { margin: 0 0 0.5rem; }
.req-card ul { margin: 0; padding-left: 1.2rem; color: var(--muted); }
.req-card li { margin-bottom: 0.35rem; }

.version-list { display: grid; gap: 1rem; }
.version-item {
  background: #fff;
  padding: 1.25rem 1.4rem;
  border-radius: var(--radius);
  border: 1px solid #e2e8f0;
}
.version-item h3 { margin: 0 0 0.45rem; color: var(--primary-dark); }
.version-item p { margin: 0; color: var(--muted); }

/* Article (zh-cn) */
.article {
  background: #fff;
  border-radius: var(--radius);
  padding: 2rem 2.25rem;
  border: 1px solid rgba(13, 148, 136, 0.12);
  box-shadow: 0 8px 28px rgba(15, 23, 42, 0.04);
}
.article h2 {
  margin: 2rem 0 0.75rem;
  color: var(--primary-dark);
  font-size: 1.4rem;
}
.article h2:first-child { margin-top: 0; }
.article h3 {
  margin: 1.35rem 0 0.55rem;
  font-size: 1.15rem;
  color: var(--ink);
}
.article p { margin: 0 0 1rem; color: var(--muted); }
.article ul { color: var(--muted); }
.cta-box {
  margin: 2rem 0;
  padding: 1.5rem;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(13, 148, 136, 0.12), rgba(6, 182, 212, 0.1));
  border: 1px solid rgba(13, 148, 136, 0.25);
  text-align: center;
}
.cta-box p { margin: 0 0 1rem; color: var(--ink); }

/* Footer */
.site-footer {
  margin-top: 2rem;
  padding: 2.5rem 0 2rem;
  background: linear-gradient(180deg, #0f766e, #115e59);
  color: rgba(255, 255, 255, 0.9);
}
.footer-inner {
  display: grid;
  gap: 1rem;
}
.footer-brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: #fff;
}
.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-nav a { color: #99f6e4; text-decoration: none; }
.footer-nav a:hover { color: #fff; text-decoration: underline; }
.footer-safe {
  padding: 0.85rem 1rem;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  font-size: 0.95rem;
}
.footer-copy {
  margin: 0;
  font-size: 0.88rem;
  opacity: 0.85;
  line-height: 1.7;
}

/* Utility */
.prose p { margin: 0 0 1rem; color: var(--muted); }
.prose p:last-child { margin-bottom: 0; }
.mt-0 { margin-top: 0; }
.mb-1 { margin-bottom: 0.75rem; }

@media (max-width: 900px) {
  .hero-grid,
  .dl-main,
  .essay-grid,
  .req-grid { grid-template-columns: 1fr; }
  .platform-strip,
  .stats-bar { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .nav-links a { padding: 0.45rem 0.55rem; font-size: 0.9rem; }
  .brand span { font-size: 0.95rem; }
  .platform-strip,
  .stats-bar { grid-template-columns: 1fr; }
  .band { grid-template-columns: 1fr; }
  .article { padding: 1.35rem; }
  .hero { padding: 3rem 0 2.5rem; }
}