/* 还能吃官网：首页、隐私政策、技术支持共用 */
:root {
  --accent: #248a3d;
  --accent-soft: #e3f3e7;
  --orange: #e8862a;
  --ink: #1b2420;
  --sub: #5f6b65;
  --line: #e3e9e5;
  --bg: #f4f7f3;
  --card: #ffffff;
  --shadow: 0 24px 60px rgba(20, 60, 35, 0.12), 0 4px 14px rgba(20, 60, 35, 0.06);
  --radius: 24px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --accent: #3fbf5f;
    --accent-soft: #173322;
    --ink: #eef3ef;
    --sub: #9fb0a7;
    --line: #26322c;
    --bg: #0e1411;
    --card: #17201b;
    --shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.65 -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* 顶栏 */
.nav { position: sticky; top: 0; z-index: 10; backdrop-filter: saturate(1.6) blur(16px); -webkit-backdrop-filter: saturate(1.6) blur(16px); background: color-mix(in srgb, var(--bg) 78%, transparent); border-bottom: 1px solid var(--line); }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 19px; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.nav nav { display: flex; gap: 22px; font-size: 15px; }
.nav nav a { color: var(--sub); }
@media (max-width: 560px) { .nav nav .optional { display: none; } }

/* 首屏 */
.hero { position: relative; overflow: hidden; background: radial-gradient(900px 500px at 10% -10%, color-mix(in srgb, var(--accent) 22%, transparent), transparent 70%), radial-gradient(700px 500px at 100% 100%, color-mix(in srgb, var(--orange) 16%, transparent), transparent 70%); }
.hero .wrap { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 40px; align-items: center; padding-top: 56px; padding-bottom: 56px; }
.hero .phone { max-width: 290px; }
.hero h1 { margin: 0 0 18px; font-size: clamp(38px, 6vw, 60px); line-height: 1.15; letter-spacing: 1px; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero .lead { margin: 0 0 30px; font-size: 19px; color: var(--sub); max-width: 30em; }
.hero .icon { width: 84px; height: 84px; border-radius: 20px; box-shadow: var(--shadow); margin-bottom: 26px; }
.store { display: inline-flex; align-items: center; gap: 10px; padding: 14px 26px; border-radius: 999px; background: var(--ink); color: var(--bg); font-weight: 700; font-size: 17px; }
.store:hover { text-decoration: none; opacity: 0.9; }
.store.soon { background: var(--accent-soft); color: var(--accent); }
.hero .note { margin-top: 14px; font-size: 14px; color: var(--sub); }
.phone { width: 100%; max-width: 330px; margin: 0 auto; border-radius: 46px; padding: 9px; background: #17201c; box-shadow: var(--shadow); }
.phone img { border-radius: 38px; width: 100%; }
@media (max-width: 820px) {
  .hero .wrap { grid-template-columns: 1fr; text-align: center; padding-top: 48px; }
  .hero .icon, .hero .lead { margin-left: auto; margin-right: auto; }
  .phone { max-width: 280px; }
}

/* 功能 */
section { padding: 76px 0; }
.section-title { text-align: center; margin: 0 0 12px; font-size: clamp(28px, 4vw, 38px); }
.section-lead { text-align: center; margin: 0 auto 48px; color: var(--sub); max-width: 34em; }
.feature { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; margin-bottom: 72px; }
.feature:last-child { margin-bottom: 0; }
.feature:nth-child(even) .text { order: 2; }
.feature .tag { display: inline-block; padding: 4px 12px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); font-size: 14px; font-weight: 700; margin-bottom: 14px; }
.feature h3 { margin: 0 0 12px; font-size: 30px; line-height: 1.3; }
.feature p { margin: 0; color: var(--sub); }
.feature ul { margin: 16px 0 0; padding-left: 20px; color: var(--sub); }
.feature .phone { max-width: 290px; }
@media (max-width: 820px) {
  .feature { grid-template-columns: 1fr; gap: 28px; text-align: center; }
  .feature:nth-child(even) .text { order: 0; }
  .feature ul { text-align: left; display: inline-block; }
  .feature .phone { max-width: 250px; }
}

/* 卡片网格 */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
@media (max-width: 820px) { .grid { grid-template-columns: 1fr; } }
.card { background: var(--card); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); }
.card h4 { margin: 10px 0 6px; font-size: 19px; }
.card p { margin: 0; color: var(--sub); font-size: 15px; }
.card .emoji { font-size: 28px; }
.band { background: var(--card); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.band .card { box-shadow: none; background: var(--bg); }

/* 价格 */
.plans { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; max-width: 760px; margin: 0 auto; }
@media (max-width: 680px) { .plans { grid-template-columns: 1fr; } }
.plan h4 { margin: 0; font-size: 22px; }
.plan .price { margin: 8px 0 18px; font-size: 32px; font-weight: 800; }
.plan .price small { font-size: 15px; font-weight: 500; color: var(--sub); }
.plan.pro { outline: 2px solid var(--accent); }
.plan table { width: 100%; border-collapse: collapse; font-size: 15px; }
.plan td { padding: 9px 0; border-top: 1px solid var(--line); }
.plan td:last-child { text-align: right; font-weight: 700; }
.fine { text-align: center; color: var(--sub); font-size: 14px; margin-top: 22px; }

/* 文章页（隐私政策、技术支持） */
.doc { max-width: 760px; margin: 0 auto; padding: 48px 20px 72px; }
.doc h1 { font-size: clamp(30px, 5vw, 40px); margin: 0 0 6px; }
.doc .date { color: var(--sub); margin: 0 0 32px; }
.doc h2 { font-size: 21px; margin: 40px 0 10px; padding-bottom: 8px; border-bottom: 1px solid var(--line); }
.doc p, .doc li { color: color-mix(in srgb, var(--ink) 86%, var(--sub)); }
.doc ul { padding-left: 22px; }
.doc li { margin-bottom: 8px; }
.doc table { width: 100%; border-collapse: collapse; font-size: 15px; margin: 12px 0; }
.doc th, .doc td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
.doc th { color: var(--sub); font-weight: 600; }
.doc .summary { background: var(--accent-soft); border-radius: 18px; padding: 18px 22px; }
.doc .summary p { margin: 0; }
.doc details { background: var(--card); border-radius: 16px; padding: 14px 18px; margin-bottom: 12px; box-shadow: var(--shadow); }
.doc summary { cursor: pointer; font-weight: 700; }
.doc details p { margin: 10px 0 0; }

/* 页脚 */
footer { border-top: 1px solid var(--line); padding: 32px 0 40px; color: var(--sub); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 10px 24px; justify-content: space-between; }
footer nav { display: flex; flex-wrap: wrap; gap: 8px 20px; }
footer a { color: var(--sub); }