:root { color: #1c2a42; background: #f6f8fc; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; }
* { box-sizing: border-box; }
body { margin: 0; }
.guide-shell { width: min(860px, calc(100% - 40px)); margin: 0 auto; padding: 68px 0 72px; }
.brand { display: inline-flex; align-items: center; gap: 9px; color: #263852; text-decoration: none; font-size: 15px; font-weight: 700; }
.brand img { width: 28px; height: 28px; border-radius: 8px; }
article { margin-top: 30px; padding: clamp(26px, 6vw, 58px); border: 1px solid #e2e9f4; border-radius: 22px; background: #fff; box-shadow: 0 20px 50px rgba(39, 72, 120, .08); }
.eyebrow { margin: 0 0 12px; color: #2f63ea; font-size: 13px; font-weight: 700; letter-spacing: .08em; }
h1 { margin: 0; color: #152443; font-size: clamp(30px, 5vw, 44px); line-height: 1.22; letter-spacing: -.025em; }
.lead { margin: 20px 0 0; color: #5f718a; font-size: 17px; line-height: 1.85; }
.meta { margin-top: 18px; color: #8a9ab0; font-size: 13px; }
section { margin-top: 38px; }
h2 { margin: 0 0 14px; color: #203555; font-size: 21px; }
p, li { color: #53657d; line-height: 1.85; }
ul, ol { margin: 0; padding-left: 22px; }
.notice { margin-top: 18px; padding: 15px 18px; border-left: 3px solid #5a8dff; border-radius: 10px; background: #f2f7ff; color: #47617f; line-height: 1.75; }
.action { display: inline-flex; margin-top: 32px; padding: 12px 18px; border-radius: 10px; background: #2f63ea; color: #fff; font-weight: 650; text-decoration: none; box-shadow: 0 10px 22px rgba(47, 99, 234, .22); }
footer { margin-top: 22px; color: #92a0b5; font-size: 13px; text-align: center; }
@media (max-width: 600px) { .guide-shell { width: min(100% - 28px, 860px); padding: 30px 0 44px; } article { padding: 28px 22px; } }