:root {
  --brand: #00a26e;
  --brand-dark: #008c5e;
  --brand-soft: #e6f7f1;
  --ink: #1a1a1a;
  --muted: #5c6670;
  --line: #e6e9ed;
  --bg: #f7f9fb;
  --white: #ffffff;
  --shadow: 0 12px 40px rgba(22, 40, 30, 0.08);
  --radius: 16px;
  --max: 1180px;
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--white);
  line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

.container { width: min(100% - 40px, var(--max)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(230, 233, 237, 0.9);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: 20px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 20px;
}
.logo-mark {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: linear-gradient(145deg, #00b87a, #008c5e);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 14px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  color: var(--muted);
  font-size: 15px;
}
.nav-links a:hover { color: var(--brand); }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 22px;
  border-radius: 999px;
  border: none;
  font-weight: 600;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 8px 20px rgba(0, 162, 110, 0.28);
}
.btn-primary:hover { background: var(--brand-dark); }
.btn-ghost {
  background: transparent;
  color: var(--brand);
  border: 1px solid rgba(0, 162, 110, 0.35);
}
.btn-lg { min-height: 52px; padding: 0 28px; font-size: 16px; }
.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 72px 0 88px;
  background:
    radial-gradient(circle at 85% 20%, rgba(0, 162, 110, 0.16), transparent 42%),
    radial-gradient(circle at 10% 80%, rgba(45, 140, 255, 0.08), transparent 36%),
    linear-gradient(180deg, #f2faf7 0%, #ffffff 70%);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--brand-dark);
  background: var(--brand-soft);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 18px;
}
.hero h1 {
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.18;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
}
.hero p {
  color: var(--muted);
  font-size: 18px;
  max-width: 540px;
  margin-bottom: 28px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.hero-visual {
  position: relative;
  min-height: 420px;
  border-radius: 28px;
  background:
    linear-gradient(160deg, rgba(255,255,255,0.9), rgba(232,248,236,0.75)),
    linear-gradient(135deg, #00a26e, #0f6b8f);
  box-shadow: var(--shadow);
  overflow: hidden;
  animation: floatIn .8s ease both;
}
.hero-visual::before {
  content: "";
  position: absolute;
  inset: 18% 12% auto;
  height: 58%;
  border-radius: 18px;
  background: rgba(255,255,255,0.92);
  box-shadow: 0 20px 40px rgba(0,0,0,0.12);
}
.hero-visual::after {
  content: "文档 · 表格 · 演示 · PDF";
  position: absolute;
  left: 18%;
  top: 28%;
  color: #2d3a33;
  font-weight: 700;
  font-size: 18px;
}

.section { padding: 84px 0; }
.section.alt { background: var(--bg); }
.section-head {
  max-width: 720px;
  margin: 0 auto 48px;
  text-align: center;
}
.section-head h2 {
  font-size: clamp(28px, 3.5vw, 40px);
  line-height: 1.25;
  margin-bottom: 14px;
}
.section-head p { color: var(--muted); font-size: 17px; }

.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: center;
  margin-bottom: 56px;
}
.feature-row:last-child { margin-bottom: 0; }
.feature-row.reverse .feature-copy { order: 2; }
.feature-row.reverse .feature-media { order: 1; }
.feature-copy h3 {
  font-size: 28px;
  margin-bottom: 14px;
}
.feature-copy p { color: var(--muted); font-size: 16px; }
.feature-media {
  min-height: 280px;
  border-radius: var(--radius);
  background:
    linear-gradient(145deg, rgba(0,162,110,0.12), rgba(255,255,255,0.9)),
    #eef6f0;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  animation: rise .7s ease both;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: 0 8px 24px rgba(16, 28, 22, 0.04);
  transition: transform .25s ease, box-shadow .25s ease;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: var(--brand-soft);
  color: var(--brand-dark);
  font-weight: 800;
  margin-bottom: 16px;
}
.card h3 { font-size: 20px; margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 15px; }

.platforms {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.platform {
  text-align: center;
  padding: 28px 16px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
}
.platform strong { display: block; margin: 10px 0 6px; }
.platform span { color: var(--muted); font-size: 14px; }

.cta-band {
  margin: 20px 0 40px;
  padding: 48px;
  border-radius: 24px;
  background:
    linear-gradient(120deg, rgba(0,162,110,0.95), rgba(18,120,150,0.92));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  box-shadow: var(--shadow);
}
.cta-band h2 { font-size: 30px; margin-bottom: 8px; }
.cta-band p { opacity: 0.92; }
.cta-band .btn-primary {
  background: #fff;
  color: var(--brand-dark);
  box-shadow: none;
}

.article-list {
  display: grid;
  gap: 18px;
}
.article-item {
  display: grid;
  grid-template-columns: 160px 1fr auto;
  gap: 20px;
  align-items: center;
  padding: 22px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.article-item time {
  color: var(--muted);
  font-size: 14px;
}
.article-item h3 { font-size: 20px; margin-bottom: 6px; }
.article-item p { color: var(--muted); font-size: 14px; }

.page-hero {
  padding: 56px 0 28px;
  background: linear-gradient(180deg, #f2faf7, #fff);
}
.page-hero h1 {
  font-size: clamp(28px, 4vw, 42px);
  margin-bottom: 12px;
}
.page-hero p { color: var(--muted); max-width: 680px; }

.download-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.download-card {
  padding: 32px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: #fff;
  box-shadow: 0 8px 24px rgba(16, 28, 22, 0.04);
}
.download-card h3 { font-size: 22px; margin-bottom: 10px; }
.download-card p { color: var(--muted); margin-bottom: 20px; }

.article-body {
  max-width: 820px;
  margin: 0 auto;
  padding: 20px 0 80px;
}
.article-body h2 {
  font-size: 24px;
  margin: 32px 0 12px;
}
.article-body p {
  color: #334048;
  margin-bottom: 16px;
  font-size: 16px;
}
.article-meta {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 28px;
}
.daily-feed {
  margin-top: 40px;
  padding: 24px;
  border-radius: var(--radius);
  background: var(--bg);
  border: 1px solid var(--line);
}
.daily-feed h3 { margin-bottom: 14px; }
.daily-feed li {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
}
.daily-feed li:last-child { border-bottom: none; }
.daily-feed strong { color: var(--ink); display: block; margin-bottom: 4px; }

.site-footer {
  background: #12181c;
  color: rgba(255,255,255,0.78);
  padding: 48px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 28px;
  margin-bottom: 28px;
}
.site-footer a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 18px;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
}

@keyframes floatIn {
  from { opacity: 0; transform: translateY(18px) scale(0.98); }
  to { opacity: 1; transform: none; }
}
@keyframes rise {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: none; }
}

@media (max-width: 960px) {
  .hero-grid,
  .feature-row,
  .feature-row.reverse,
  .cards,
  .platforms,
  .download-grid,
  .footer-grid,
  .article-item,
  .cta-band {
    grid-template-columns: 1fr;
    display: grid;
  }
  .feature-row.reverse .feature-copy,
  .feature-row.reverse .feature-media { order: initial; }
  .nav-links {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 20px 20px;
    border-bottom: 1px solid var(--line);
    gap: 14px;
  }
  .nav-links.open { display: flex; }
  .menu-toggle { display: inline-grid; place-items: center; }
  .hero-visual { min-height: 300px; }
  .cta-band { text-align: center; justify-items: center; }
}