/* 畅学语言官网样式 */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --brand: #FF5A3C;
  --brand-dark: #E64A2E;
  --purple: #8E7BEF;
  --teal: #2EC4B6;
  --gold: #C9A227;
  --ink: #2B2D42;
  --ink-soft: #5a5c75;
  --ink-faint: #9a9cb0;
  --cream: #FFF9F2;
  --muted: #f3ece2;
}
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;
  background: var(--cream);
  color: var(--ink);
  line-height: 1.6;
}
img { max-width: 100%; }
a { color: inherit; text-decoration: none; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* ── 导航 ── */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 249, 242, .88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(43, 45, 66, .06);
}
.nav-inner {
  max-width: 1080px; margin: 0 auto; padding: 12px 20px;
  display: flex; align-items: center; gap: 24px;
}
.nav-logo { display: flex; align-items: center; gap: 10px; font-size: 19px; font-weight: 800; }
.nav-logo img { width: 34px; height: 34px; border-radius: 9px; }
.nav-links { margin-left: auto; display: flex; align-items: center; gap: 22px; font-size: 14.5px; color: var(--ink-soft); }
.nav-links a:hover { color: var(--brand); }
.nav-links .cta {
  background: var(--brand); color: #fff; padding: 8px 18px; border-radius: 999px;
  font-weight: 600; box-shadow: 0 4px 14px rgba(255, 90, 60, .35);
}
.nav-links .cta:hover { background: var(--brand-dark); color: #fff; }
.nav-toggle { display: none; }
@media (max-width: 720px) {
  .nav-links { gap: 12px; font-size: 13px; }
  .nav-links a:not(.cta):not(.keep) { display: none; }
}

/* ── Hero ── */
.hero {
  background: linear-gradient(160deg, #FF5A3C 0%, #FF8C5A 46%, #8E7BEF 100%);
  color: #fff; text-align: center; padding: 84px 20px 110px;
  position: relative; overflow: hidden;
}
.hero::after {
  content: ''; position: absolute; inset: auto -10% -60% -10%; height: 80%;
  background: radial-gradient(closest-side, rgba(255,255,255,.18), transparent);
  pointer-events: none;
}
.hero .logo { width: 108px; height: 108px; border-radius: 28px; box-shadow: 0 16px 40px rgba(0,0,0,.25); }
.hero h1 { font-size: 44px; margin-top: 20px; letter-spacing: 2px; }
.hero .slogan-en { font-size: 19px; opacity: .95; margin-top: 6px; font-style: italic; letter-spacing: .5px; }
.hero .slogan-zh { font-size: 16px; opacity: .85; margin-top: 12px; }
.hero-btns { margin-top: 34px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; position: relative; z-index: 1; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 30px; border-radius: 999px; font-size: 16px; font-weight: 700;
  transition: transform .15s, box-shadow .15s;
}
.btn:active { transform: scale(.97); }
.btn-white { background: #fff; color: var(--brand); box-shadow: 0 10px 26px rgba(0,0,0,.18); }
.btn-ghost { background: rgba(255,255,255,.16); color: #fff; border: 1.5px solid rgba(255,255,255,.55); }
.btn-ghost:hover { background: rgba(255,255,255,.26); }

/* ── 功能区 ── */
.section { padding: 72px 0; }
.section-title { text-align: center; font-size: 30px; font-weight: 800; }
.section-sub { text-align: center; color: var(--ink-faint); margin-top: 8px; font-size: 15px; }
.features {
  margin-top: 44px; display: grid; gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
.feature {
  background: #fff; border-radius: 20px; padding: 26px 24px;
  box-shadow: 0 4px 18px rgba(43, 45, 66, .06);
  transition: transform .2s, box-shadow .2s;
}
.feature:hover { transform: translateY(-4px); box-shadow: 0 12px 30px rgba(43, 45, 66, .1); }
.feature .icon {
  width: 48px; height: 48px; border-radius: 14px; font-size: 24px;
  display: flex; align-items: center; justify-content: center; margin-bottom: 14px;
}
.feature h3 { font-size: 17px; }
.feature p { margin-top: 7px; font-size: 14px; color: var(--ink-soft); }

/* ── 截图区 ── */
.shots { background: linear-gradient(180deg, #2B2D42, #1F2033); color: #fff; }
.shots .section-sub { color: rgba(255,255,255,.55); }
.shot-row { margin-top: 46px; display: flex; gap: 26px; justify-content: center; flex-wrap: wrap; }
.shot {
  width: 250px; border-radius: 26px; overflow: hidden;
  border: 5px solid rgba(255,255,255,.12);
  box-shadow: 0 22px 50px rgba(0,0,0,.45);
  transition: transform .25s;
}
.shot:hover { transform: translateY(-8px) scale(1.02); }
.shot img { display: block; width: 100%; }
.shot-cap { margin-top: 14px; text-align: center; font-size: 13.5px; color: rgba(255,255,255,.65); }

/* ── 下载区 ── */
.download { text-align: center; }
.dl-cards { margin-top: 40px; display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; }
.dl-card {
  background: #fff; border-radius: 22px; padding: 32px 36px; width: 320px;
  box-shadow: 0 6px 22px rgba(43, 45, 66, .08);
}
.dl-card .big { font-size: 40px; }
.dl-card h3 { margin-top: 10px; font-size: 18px; }
.dl-card p { margin-top: 6px; font-size: 13.5px; color: var(--ink-faint); min-height: 40px; }
.dl-card .btn { margin-top: 18px; width: 100%; justify-content: center; }
.btn-brand { background: var(--brand); color: #fff; box-shadow: 0 8px 20px rgba(255, 90, 60, .35); }
.btn-teal { background: var(--teal); color: #fff; box-shadow: 0 8px 20px rgba(46, 196, 182, .35); }
.version-note { margin-top: 22px; font-size: 13px; color: var(--ink-faint); }

/* ── 页脚 ── */
footer { background: #1F2033; color: rgba(255,255,255,.6); padding: 40px 0 30px; font-size: 13.5px; }
footer .wrap { display: flex; flex-direction: column; gap: 14px; align-items: center; text-align: center; }
footer .links { display: flex; gap: 22px; flex-wrap: wrap; justify-content: center; }
footer .links a:hover { color: #fff; }
footer .brand-line { display: flex; align-items: center; gap: 8px; color: #fff; font-weight: 700; font-size: 15px; }
footer .brand-line img { width: 26px; height: 26px; border-radius: 7px; }

/* ── 法律页 ── */
.legal { max-width: 760px; margin: 0 auto; padding: 56px 20px 80px; }
.legal h1 { font-size: 28px; margin-bottom: 6px; }
.legal .updated { color: var(--ink-faint); font-size: 13px; margin-bottom: 26px; }
.legal h2 { font-size: 18px; margin: 26px 0 8px; }
.legal p { color: var(--ink-soft); font-size: 14.5px; margin-bottom: 10px; }
.legal .back { display: inline-block; margin-bottom: 22px; color: var(--brand); font-size: 14px; }