/* =========================================================================
   悬浮时钟 · 官网 / 隐私协议 / 用户协议  —— 共享样式
   品牌色：主色 #FF5267  副色 #FF8E72（135° 渐变）
   纯静态、零依赖，可直接部署到任意静态服务器。
   ========================================================================= */

:root {
  --brand: #FF5267;
  --brand-2: #FF8E72;
  --brand-grad: linear-gradient(135deg, #FF5267 0%, #FF8E72 100%);
  --brand-soft: rgba(255, 82, 103, 0.10);
  --brand-soft-2: rgba(255, 82, 103, 0.16);

  --ink-1: #1A1A1E;   /* 主文字 */
  --ink-2: #5A5A63;   /* 次要文字 */
  --ink-3: #93939C;   /* 辅助/占位 */
  --line: #ECECF0;    /* 分隔线 */
  --bg: #FFFFFF;
  --bg-soft: #FAFAFB;
  --bg-deep: #16161A; /* 深色页脚 */

  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 10px rgba(20, 20, 30, 0.06);
  --shadow-md: 0 10px 32px rgba(20, 20, 30, 0.10);
  --maxw: 1080px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
          "Microsoft YaHei", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink-1);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: var(--ink-1); }
.brand .logo {
  width: 30px; height: 30px; border-radius: 9px;
  background: var(--brand-grad);
  display: grid; place-items: center; color: #fff; font-size: 16px; font-weight: 700;
  box-shadow: var(--shadow-sm);
}
.nav-links { display: flex; align-items: center; gap: 26px; }
.nav-links a { color: var(--ink-2); font-size: 15px; font-weight: 500; }
.nav-links a:hover { color: var(--brand); text-decoration: none; }
.nav-toggle { display: none; background: none; border: 0; font-size: 24px; cursor: pointer; color: var(--ink-1); }

/* 语言切换器（始终可见，含移动端） */
.nav-right { display: flex; align-items: center; gap: 14px; }
.lang-select {
  appearance: none; -webkit-appearance: none; -moz-appearance: none;
  font-size: 13px; font-weight: 600; color: var(--ink-1);
  background-color: #fff; border: 1px solid var(--line); border-radius: 999px;
  padding: 6px 30px 6px 12px; cursor: pointer; min-width: 96px;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'><path d='M1 1l4 4 4-4' stroke='%23999' stroke-width='1.5' fill='none' stroke-linecap='round'/></svg>");
  background-repeat: no-repeat; background-position: right 12px center;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.lang-select:hover { border-color: var(--brand); }
.lang-select:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px rgba(255,82,103,.15); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 26px; border-radius: 999px; font-size: 15px; font-weight: 600;
  cursor: pointer; border: 0; transition: transform .15s ease, box-shadow .15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--brand-grad); color: #fff; box-shadow: 0 8px 22px rgba(255, 82, 103, 0.35); }
.btn-ghost { background: var(--brand-soft); color: var(--brand); }
.btn-line { background: #fff; color: var(--ink-1); border: 1px solid var(--line); box-shadow: var(--shadow-sm); }

/* ---------- Hero ---------- */
.hero { padding: 72px 0 56px; }
.hero-inner { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
.eyebrow {
  display: inline-block; font-size: 13px; font-weight: 600; letter-spacing: .04em;
  color: var(--brand); background: var(--brand-soft); padding: 5px 12px; border-radius: 999px; margin-bottom: 18px;
}
.hero h1 { font-size: 46px; line-height: 1.18; margin: 0 0 16px; letter-spacing: -0.01em; }
.hero h1 .grad {
  background: var(--brand-grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p.lead { font-size: 18px; color: var(--ink-2); margin: 0 0 28px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-visual {
  background: var(--brand-grad); border-radius: 30px; padding: 28px;
  color: #fff; box-shadow: var(--shadow-md); position: relative; overflow: hidden;
}
.hero-visual .clock { font-size: 64px; font-weight: 800; font-variant-numeric: tabular-nums; letter-spacing: .02em; }
.hero-visual .clock-cap { opacity: .9; font-size: 14px; margin-top: 4px; }
.hero-visual .chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.hero-visual .chip {
  background: rgba(255, 255, 255, 0.18); border: 1px solid rgba(255, 255, 255, 0.28);
  padding: 6px 12px; border-radius: 999px; font-size: 13px; backdrop-filter: blur(4px);
}

/* ---------- 区块 ---------- */
.section { padding: 64px 0; }
.section.soft { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 44px; }
.section-head h2 { font-size: 32px; margin: 0 0 12px; letter-spacing: -0.01em; }
.section-head p { color: var(--ink-2); font-size: 17px; margin: 0; }

/* ---------- 功能网格 ---------- */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-md);
  padding: 24px; box-shadow: var(--shadow-sm); transition: transform .15s ease, box-shadow .15s ease;
}
.feature-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.feature-card .ic {
  width: 46px; height: 46px; border-radius: 13px; background: var(--brand-soft);
  display: grid; place-items: center; font-size: 22px; margin-bottom: 14px;
}
.feature-card h3 { margin: 0 0 6px; font-size: 17px; }
.feature-card p { margin: 0; color: var(--ink-2); font-size: 14px; }

/* ---------- 隐私要点 ---------- */
.points { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.point {
  display: flex; gap: 14px; align-items: flex-start; background: #fff;
  border: 1px solid var(--line); border-radius: var(--radius-md); padding: 20px;
}
.point .badge {
  flex: 0 0 auto; width: 38px; height: 38px; border-radius: 11px;
  background: var(--brand-grad); color: #fff; display: grid; place-items: center; font-size: 18px;
}
.point h4 { margin: 0 0 4px; font-size: 15px; }
.point p { margin: 0; color: var(--ink-2); font-size: 13.5px; }

/* ---------- 法律文档 ---------- */
.legal { padding: 48px 0 72px; }
.legal .container { max-width: 860px; }
.legal h1 { font-size: 30px; margin: 0 0 6px; }
.legal .updated { color: var(--ink-3); font-size: 14px; margin: 0 0 28px; }
.legal h2 { font-size: 21px; margin: 38px 0 12px; padding-top: 18px; border-top: 1px solid var(--line); }
.legal h3 { font-size: 16px; margin: 22px 0 8px; color: var(--ink-1); }
.legal p, .legal li { color: var(--ink-2); font-size: 15px; }
.legal ul, .legal ol { padding-left: 22px; }
.legal li { margin: 6px 0; }
.legal strong { color: var(--ink-1); }
.legal .callout {
  background: var(--brand-soft); border-left: 3px solid var(--brand);
  padding: 14px 16px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 14px; color: var(--ink-2); margin: 18px 0;
}
.legal .toc { background: var(--bg-soft); border: 1px solid var(--line); border-radius: var(--radius-md); padding: 18px 22px; margin: 24px 0 8px; }
.legal .toc a { font-size: 14px; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--bg-deep); color: #C9C9D2; padding: 48px 0 28px; }
.site-footer a { color: #C9C9D2; }
.site-footer a:hover { color: #fff; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 28px; }
.foot-brand { font-size: 17px; font-weight: 700; color: #fff; display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.foot-brand .logo { width: 28px; height: 28px; border-radius: 8px; background: var(--brand-grad); display: grid; place-items: center; color: #fff; font-size: 15px; }
.foot-col h4 { color: #fff; font-size: 14px; margin: 0 0 12px; }
.foot-col a { display: block; font-size: 14px; margin: 8px 0; }
.foot-bottom { border-top: 1px solid rgba(255,255,255,0.10); margin-top: 32px; padding-top: 18px; font-size: 13px; color: #8A8A95; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }

/* ---------- 响应式 ---------- */
@media (max-width: 860px) {
  .hero-inner { grid-template-columns: 1fr; gap: 32px; }
  .hero h1 { font-size: 36px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .points { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
  .nav-links.open {
    display: flex; flex-direction: column; gap: 4px; position: absolute; top: 60px; left: 0; right: 0;
    background: #fff; padding: 16px 20px; border-bottom: 1px solid var(--line); box-shadow: var(--shadow-md);
  }
  .nav-toggle { display: block; }
}
@media (max-width: 520px) {
  .feature-grid { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 30px; }
}