:root {
  --brand: #FF5A1F; --brand-2: #FF7A45; --ink: #1D2129; --ink-2: #4E5969; --muted: #86909C;
  --line: #E5E6EB; --bg: #F7F8FA; --card: #FFFFFF; --tint: #FFF1EB;
}
@media (prefers-color-scheme: dark) {
  :root { --ink: #E8E9EB; --ink-2: #C2C6CC; --muted: #8A9099; --line: #2E3238; --bg: #141619; --card: #1D2025; --tint: #3A2419; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.7 -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif; }
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }

header { background: var(--card); border-bottom: 1px solid var(--line); }
header .wrap { display: flex; align-items: center; height: 64px; gap: 12px; }
.logo { width: 36px; height: 36px; border-radius: 10px; background: var(--brand); color: #fff; font-weight: 800; display: grid; place-items: center; font-size: 20px; }
.brand { font-weight: 700; font-size: 19px; color: var(--ink); }
header nav { margin-left: auto; display: flex; gap: 20px; font-size: 15px; }
header nav a { color: var(--ink-2); }

.hero { background: linear-gradient(150deg, var(--brand-2), var(--brand)); color: #fff; }
.hero .wrap { display: grid; grid-template-columns: 1.3fr 1fr; gap: 40px; align-items: center; padding-top: 64px; padding-bottom: 64px; }
.hero h1 { font-size: 40px; line-height: 1.25; margin: 0 0 16px; letter-spacing: .5px; }
.hero p { font-size: 18px; margin: 0 0 28px; opacity: .95; max-width: 34em; }
.find { display: inline-flex; align-items: center; gap: 10px; background: rgba(255,255,255,.18); border: 1px solid rgba(255,255,255,.45); border-radius: 999px; padding: 10px 22px; font-size: 17px; font-weight: 600; }
.qr { justify-self: center; background: #fff; border-radius: 20px; padding: 18px; text-align: center; color: #1D2129; box-shadow: 0 12px 32px rgba(0,0,0,.15); }
.qr img { width: 200px; height: 200px; display: block; }
.qr span { display: block; margin-top: 8px; font-size: 14px; color: #4E5969; }
.phone { justify-self: center; width: 240px; background: #fff; border-radius: 28px; padding: 16px; box-shadow: 0 12px 32px rgba(0,0,0,.18); color: #1D2129; }
.phone .row { display: flex; gap: 10px; align-items: center; padding: 10px; border-radius: 14px; background: #F7F8FA; margin-bottom: 8px; font-size: 14px; }
.phone .row b { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; color: #fff; font-size: 13px; flex: none; }
.phone .row em { margin-left: auto; font-style: normal; font-weight: 700; color: #F53F3F; white-space: nowrap; }

section { padding: 56px 0; }
section h2 { font-size: 28px; margin: 0 0 8px; text-align: center; }
section .lead { text-align: center; color: var(--muted); margin: 0 0 36px; }
.grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 24px; }
.card .ic { width: 44px; height: 44px; border-radius: 12px; background: var(--tint); color: var(--brand); display: grid; place-items: center; font-size: 22px; font-weight: 700; margin-bottom: 14px; }
.card h3 { margin: 0 0 6px; font-size: 18px; }
.card p { margin: 0; color: var(--ink-2); font-size: 15px; }
.promise { background: var(--card); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.promise ul { max-width: 720px; margin: 0 auto; padding: 0; list-style: none; display: grid; gap: 14px; }
.promise li { padding-left: 30px; position: relative; color: var(--ink-2); }
.promise li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--brand); font-weight: 800; }

footer { padding: 32px 0 40px; color: var(--muted); font-size: 14px; text-align: center; }
footer .links { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 20px; margin-bottom: 10px; }
footer .links a, footer .beian a { color: var(--muted); }
footer .beian { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 18px; }

/* 协议页 */
.doc { max-width: 760px; margin: 32px auto 0; background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 32px 36px; }
.doc h1 { font-size: 26px; margin: 0 0 8px; }
.doc h2 { font-size: 19px; margin: 28px 0 8px; }
.doc p, .doc li { color: var(--ink-2); }
.doc ul, .doc ol { padding-left: 1.4em; }
.doc .note { background: var(--tint); border-radius: 10px; padding: 10px 14px; }

@media (max-width: 860px) {
  .hero .wrap { grid-template-columns: 1fr; padding-top: 44px; padding-bottom: 44px; gap: 28px; }
  .hero h1 { font-size: 30px; }
  .grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 520px) {
  header nav { display: none; }
  .grid { grid-template-columns: 1fr; }
  .doc { margin: 16px 0 0; padding: 22px 18px; border-radius: 0; border-left: 0; border-right: 0; }
  section { padding: 40px 0; }
}