/* FrameXT 官网样式 —— 延续软件浅色主题：#F5F6F8 底 / 白卡片 / #6C5CE7 强调 / 全局圆角 */

:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --accent: #6c5ce7;
  --accent-dark: #5546c8;
  --accent-soft: #eeebfc;
  --text: #2d2d3a;
  --text-2: #6b6b7d;
  --border: #e6e7ec;
  --radius: 14px;
  --shadow: 0 6px 24px rgba(45, 45, 58, 0.07);
  --max: 1120px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

/* sticky 导航不遮挡锚点跳转目标 */
section[id], header[id] { scroll-margin-top: 76px; }

a { color: var(--accent); text-decoration: none; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* ---------- 导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--max); margin: 0 auto; padding: 14px 24px;
  display: flex; align-items: center; gap: 28px;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 19px; color: var(--text); letter-spacing: 0.2px;
}
.logo img { border-radius: 8px; }
.nav-links { display: flex; gap: 24px; margin-left: auto; align-items: center; }
.nav-links a { color: var(--text-2); font-size: 15px; transition: color 0.15s; }
.nav-links a:hover { color: var(--accent); }
.lang-btn {
  border: 1px solid var(--border); background: #fff; color: var(--text-2);
  border-radius: 8px; padding: 4px 12px; font-size: 13px; cursor: pointer;
  font-family: inherit; transition: all 0.15s;
}
.lang-btn:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- Hero ---------- */
.hero { padding: 72px 0 56px; text-align: center; position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: -40% -20% auto;
  height: 130%;
  background:
    radial-gradient(600px 320px at 20% 10%, rgba(108, 92, 231, 0.10), transparent 70%),
    radial-gradient(600px 320px at 80% 20%, rgba(162, 155, 254, 0.12), transparent 70%);
  pointer-events: none;
}
.hero > * { position: relative; }
.hero-tag {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--accent-soft); color: var(--accent-dark);
  font-size: 13.5px; font-weight: 600;
  padding: 5px 16px; border-radius: 999px; margin-bottom: 22px;
}
.hero-tag .dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--accent);
  animation: pulse 2s infinite;
}
@keyframes pulse { 50% { opacity: 0.35; } }
.hero h1 { font-size: 44px; line-height: 1.25; letter-spacing: 0.5px; }
.hero h1 .accent {
  background: linear-gradient(120deg, var(--accent), #a29bfe);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p.sub {
  max-width: 640px; margin: 18px auto 0;
  color: var(--text-2); font-size: 17px;
}
.hero .meta {
  margin-top: 14px; font-size: 13.5px; color: #6f6f85;
  display: flex; gap: 14px; justify-content: center; flex-wrap: wrap;
}
.hero .meta span { display: inline-flex; align-items: center; gap: 5px; }

/* 下载按钮组 */
.cta-row {
  margin-top: 30px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap;
}
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 12px 26px; border-radius: 12px;
  font-size: 15.5px; font-weight: 600; transition: all 0.18s;
}
.btn-primary {
  background: var(--accent); color: #fff;
  box-shadow: 0 6px 18px rgba(108, 92, 231, 0.32);
}
.btn-primary:hover { background: var(--accent-dark); transform: translateY(-2px); }
.btn-secondary {
  background: #fff; color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.btn svg { flex: none; }
.btn small { font-weight: 400; opacity: 0.85; font-size: 12.5px; }

/* 下载按钮下方的选择指引与 SmartScreen 提示 */
.cta-note {
  margin: 16px auto 0; max-width: 660px;
  font-size: 13px; color: #6f6f85; line-height: 1.8;
}

/* 主界面截图 */
.hero-shot {
  margin: 48px auto 0; max-width: 980px;
  border-radius: var(--radius); overflow: hidden;
  box-shadow: 0 24px 60px rgba(45, 45, 58, 0.16);
  border: 1px solid var(--border);
}

/* ---------- 通用区块 ---------- */
section { padding: 72px 0; }
.sec-head { text-align: center; margin-bottom: 44px; }
.sec-head h2 { font-size: 30px; letter-spacing: 0.5px; }
.sec-head p { color: var(--text-2); margin-top: 10px; font-size: 15.5px; }
.sec-alt { background: #fff; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

/* ---------- 效果展示 ---------- */
.samples {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.sample {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow);
  transition: transform 0.2s;
  display: flex; flex-direction: column;
}
.sample:hover { transform: translateY(-4px); }
.sample img { width: 100%; }
.sample figcaption {
  padding: 12px 16px; font-size: 13.5px; color: var(--text-2); text-align: center;
  margin-top: auto; /* 三图比例不同：caption 始终贴卡底对齐 */
}

/* ---------- 功能卡片 ---------- */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 26px 24px; box-shadow: var(--shadow);
  transition: transform 0.2s;
}
.feature:hover { transform: translateY(-3px); }
.feature .icon {
  width: 44px; height: 44px; border-radius: 11px;
  background: var(--accent-soft); color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 21px; margin-bottom: 16px;
}
.feature h3 { font-size: 17px; margin-bottom: 8px; }
.feature p { font-size: 14px; color: var(--text-2); }

/* ---------- 2.0 亮点（深色渐变区块） ---------- */
.v2 {
  background: linear-gradient(135deg, #4b3aa7 0%, #6c5ce7 55%, #8b7cf0 100%);
  color: #fff;
}
.v2 .sec-head h2 { color: #fff; }
.v2 .sec-head p { color: rgba(255, 255, 255, 0.78); }
.v2-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.v2-item {
  background: rgba(255, 255, 255, 0.10);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius); padding: 22px 24px;
  backdrop-filter: blur(4px);
}
.v2-item h3 { font-size: 16.5px; margin-bottom: 7px; display: flex; align-items: center; gap: 9px; }
.v2-item h3 .n {
  background: rgba(255, 255, 255, 0.18); border-radius: 6px;
  font-size: 12px; padding: 1px 8px; font-weight: 600;
}
.v2-item p { font-size: 14px; color: rgba(255, 255, 255, 0.9); }

/* ---------- 模板共建 ---------- */
.tpl-box {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 40px; text-align: center; max-width: 760px; margin: 0 auto;
}
.tpl-box h3 { font-size: 20px; margin-bottom: 10px; }
.tpl-box p { color: var(--text-2); font-size: 15px; }
.tpl-box .mail {
  display: inline-flex; align-items: center; gap: 8px;
  margin-top: 20px; padding: 10px 24px;
  background: var(--accent-soft); color: var(--accent-dark);
  border-radius: 10px; font-weight: 600; font-size: 15px;
}
.tpl-box .mail:hover { background: #e2ddf9; }

/* ---------- 开源 ---------- */
.oss-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; align-items: stretch; }
.oss-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow);
}
.oss-card h3 { font-size: 17.5px; margin-bottom: 10px; display: flex; align-items: center; gap: 10px; }
.oss-card p { font-size: 14.5px; color: var(--text-2); }
.oss-card .link-row { margin-top: 16px; display: flex; gap: 12px; flex-wrap: wrap; }
.oss-card .link-row a {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 14px; font-weight: 600;
  padding: 8px 18px; border-radius: 9px;
  background: var(--accent-soft); color: var(--accent-dark);
}
.oss-card .link-row a:hover { background: #e2ddf9; }

/* ---------- 历史版本 ---------- */
.legacy-box {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 34px 38px; max-width: 880px; margin: 0 auto;
  display: flex; gap: 36px; align-items: center; flex-wrap: wrap;
}
.legacy-info { flex: 1 1 300px; }
.legacy-info .ver {
  display: inline-block; background: var(--accent-soft); color: var(--accent-dark);
  font-size: 12.5px; font-weight: 700; padding: 3px 12px; border-radius: 999px; margin-bottom: 12px;
}
.legacy-info h3 { font-size: 19px; margin-bottom: 8px; }
.legacy-info p { font-size: 14px; color: var(--text-2); }
.legacy-files { flex: 1 1 320px; display: flex; flex-direction: column; gap: 10px; }
.legacy-files a {
  display: flex; align-items: center; gap: 12px;
  border: 1px solid var(--border); border-radius: 10px;
  padding: 11px 16px; color: var(--text); font-size: 14px;
  transition: all 0.15s;
}
.legacy-files a:hover { border-color: var(--accent); background: #faf9ff; }
.legacy-files .os {
  flex: none; font-size: 12px; font-weight: 700; color: var(--accent-dark);
  background: var(--accent-soft); border-radius: 6px; padding: 2px 9px;
  min-width: 64px; text-align: center;
}
.legacy-files .size { margin-left: auto; color: #6f6f85; font-size: 12.5px; flex: none; }

/* ---------- Footer ---------- */
footer { background: #fff; border-top: 1px solid var(--border); padding: 36px 0; }
.foot-inner {
  max-width: var(--max); margin: 0 auto; padding: 0 24px;
  display: flex; justify-content: space-between; align-items: center; gap: 18px; flex-wrap: wrap;
  font-size: 13.5px; color: var(--text-2);
}
.foot-links { display: flex; gap: 20px; flex-wrap: wrap; }
.foot-links a { color: var(--text-2); }
.foot-links a:hover { color: var(--accent); }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .features, .samples { grid-template-columns: repeat(2, 1fr); }
  .v2-grid, .oss-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 34px; }
  /* 移动端仅保留「下载」入口与语言切换 */
  .nav-links a:not(.lang-btn):not(.nav-dl) { display: none; }
}
@media (max-width: 560px) {
  .features, .samples { grid-template-columns: 1fr; }
  .hero h1 { font-size: 28px; }
  section { padding: 52px 0; }
}