:root {
  --paper: #f7f0e1;
  --card: #fffdf6;
  --ink: #4a3b2c;
  --soft: #6f5f4d;
  --olive: #3f5a2e;
  --olive-light: #5f7f4a;
  --clay: #c9744a;
  --seal: #b5452f;
  --line: rgba(120, 90, 50, 0.16);
  --shadow: 0 18px 40px rgba(74, 52, 28, 0.16);
  --serif: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Helvetica Neue", "Microsoft YaHei", sans-serif;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #1e1a14;
    --card: #2a241c;
    --ink: #eee4d0;
    --soft: #b8a88f;
    --olive: #a9c48a;
    --olive-light: #8fae72;
    --clay: #e09468;
    --line: rgba(238, 228, 208, 0.14);
    --shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.75 var(--sans);
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--olive); text-underline-offset: 3px; }
a:hover { color: var(--clay); }
h1, h2, h3 { font-family: var(--serif); font-weight: 700; line-height: 1.3; margin: 0; }

.wrap { width: min(1080px, 100% - 32px); margin: 0 auto; }

/* 顶栏 */
.top { border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand img { width: 36px; height: 36px; border-radius: 9px; }
.brand picture img, .brand .word { width: 64px; height: auto; border-radius: 0; }
.nav { display: flex; align-items: center; gap: 18px; font-size: 15px; }
.nav a { color: var(--soft); text-decoration: none; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--olive); }
.nav .lang { border: 1px solid var(--line); border-radius: 999px; padding: 2px 12px; }

/* 首屏 */
.hero { padding: 64px 0 40px; }
.hero .wrap { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
.hero h1 { font-size: clamp(36px, 6vw, 58px); letter-spacing: 0.06em; color: var(--olive); }
.hero h1 .en { letter-spacing: 0; }
.hero .lead { font-size: clamp(18px, 2.2vw, 21px); color: var(--soft); margin: 18px 0 28px; max-width: 30em; }
.badge {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--ink); color: var(--paper);
  border-radius: 999px; padding: 10px 22px; font-size: 15px;
}
.hero .note { font-size: 14px; color: var(--soft); margin-top: 14px; }
.seal { width: 44px; margin-bottom: 18px; }

.phone {
  border-radius: 34px;
  box-shadow: var(--shadow);
  border: 6px solid var(--card);
  background: var(--card);
  overflow: hidden;
}
.hero .phone { max-width: 330px; margin: 0 auto; transform: rotate(1.5deg); }

/* 四段 */
.steps { padding: 40px 0 24px; }
.step { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; padding: 40px 0; border-top: 1px dashed var(--line); }
.step:nth-child(even) .text { order: 2; }
.step .phone { max-width: 290px; margin: 0 auto; }
.step .kicker { font-family: var(--serif); color: var(--clay); font-size: 15px; letter-spacing: 0.3em; }
.step h2 { font-size: clamp(26px, 3.4vw, 34px); margin: 6px 0 12px; }
.step p { color: var(--soft); margin: 0; max-width: 28em; }

/* 只在你的手机里 */
.local { padding: 24px 0 72px; }
.local .box {
  background: var(--card); border: 1px solid var(--line); border-radius: 24px;
  padding: 36px clamp(20px, 4vw, 48px);
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
}
.local h2 { grid-column: 1 / -1; font-size: 28px; color: var(--olive); }
.local h3 { font-size: 18px; margin-bottom: 6px; }
.local p { margin: 0; color: var(--soft); font-size: 15.5px; }

/* 正文页 */
.doc { padding: 48px 0 80px; }
.doc .wrap { max-width: 720px; }
.doc h1 { font-size: clamp(28px, 4vw, 36px); color: var(--olive); }
.doc h2 { font-size: 21px; margin: 36px 0 8px; }
.doc .meta { color: var(--soft); font-size: 14px; margin: 6px 0 24px; }
.doc p, .doc li { color: var(--ink); }
.doc ul { padding-left: 1.2em; }
.doc hr { border: 0; border-top: 1px solid var(--line); margin: 56px 0; }
.doc .switch { font-size: 15px; }
.contact { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 18px 22px; margin-top: 32px; }
.contact p { margin: 0; }

details { border-bottom: 1px solid var(--line); padding: 14px 0; }
details summary { cursor: pointer; font-weight: 600; list-style: none; position: relative; padding-right: 28px; }
details summary::-webkit-details-marker { display: none; }
details summary::after { content: "+"; position: absolute; right: 4px; top: -2px; color: var(--clay); font-size: 22px; font-weight: 400; }
details[open] summary::after { content: "−"; }
details p { margin: 8px 0 0; color: var(--soft); }

/* 页脚 */
.foot { border-top: 1px solid var(--line); padding: 28px 0 40px; font-size: 14px; color: var(--soft); }
.foot .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 24px; }
.foot a { color: var(--soft); text-decoration: none; }
.foot a:hover { color: var(--olive); }
.foot .links, .foot .legal { display: flex; flex-wrap: wrap; gap: 6px 18px; }

.notfound { text-align: center; padding: 96px 0 120px; }
.notfound h1 { font-size: 34px; color: var(--olive); margin-bottom: 12px; }

@media (max-width: 760px) {
  body { font-size: 16px; }
  .nav { gap: 12px; font-size: 14px; }
  .nav .hide-s { display: none; }
  .hero { padding: 36px 0 16px; }
  .hero .wrap, .step { grid-template-columns: 1fr; gap: 28px; }
  .hero .phone { max-width: 260px; }
  .step:nth-child(even) .text { order: 0; }
  .step .phone { max-width: 250px; }
  .local .box { grid-template-columns: 1fr; gap: 20px; }
}