:root { color-scheme: light; --ink:#171717; --blue:#1457ff; --violet:#3b16ee; --paper:#f7f5ef; --line:rgba(23,23,23,.14); }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: Arial,"PingFang SC","Microsoft YaHei",sans-serif; }
a { color: inherit; }
.skip-link { position: fixed; top: 10px; left: 10px; z-index: 20; padding: 12px 16px; border-radius: 999px; color: #fff; background: #171717; font-weight: 800; text-decoration: none; transform: translateY(-160%); transition: transform .2s ease; }
.skip-link:focus { transform: translateY(0); }
a:focus-visible, summary:focus-visible { outline: 3px solid #f2c94c; outline-offset: 4px; }
.topbar { position: sticky; top: 0; z-index: 5; display: flex; align-items: center; justify-content: space-between; padding: 16px clamp(20px,5vw,72px); background: rgba(247,245,239,.92); border-bottom: 1px solid var(--line); backdrop-filter: blur(14px); }
.topbar a { text-decoration: none; }
.brand { color: var(--blue); font-size: 22px; font-weight: 900; }
.topbar nav { display: flex; gap: 22px; font-size: 14px; }
.hero { padding: clamp(76px,10vw,150px) clamp(22px,7vw,110px) 70px; background: #fff; }
.eyebrow { color: var(--violet); font-size: 13px; font-weight: 900; letter-spacing: .12em; text-transform: uppercase; }
h1 { max-width: 1050px; margin: 20px 0 28px; font-size: clamp(44px,7vw,104px); line-height: .98; letter-spacing: -.055em; }
.lead { max-width: 880px; margin: 0; font-size: clamp(19px,2vw,28px); line-height: 1.65; }
.shell { width: min(1120px,calc(100% - 44px)); margin: 0 auto; padding: 72px 0 100px; }
.answer { padding: 30px; border-radius: 22px; color: white; background: var(--violet); font-size: 20px; line-height: 1.75; }
h2 { margin: 72px 0 22px; font-size: clamp(31px,4vw,54px); line-height: 1.08; letter-spacing: -.035em; }
h3 { margin: 0 0 10px; font-size: 21px; }
p,li,td,th { font-size: 17px; line-height: 1.8; }
.steps,.cards { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 14px; padding: 0; list-style: none; }
.steps li,.cards article,.faq details { padding: 24px; border: 1px solid var(--line); border-radius: 18px; background: white; }
.step-no { display: block; margin-bottom: 18px; color: var(--violet); font-weight: 900; }
table { width: 100%; border-collapse: collapse; background: white; }
th,td { padding: 18px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
th { background: #ece8ff; }
.faq { display: grid; gap: 12px; }
.faq summary { cursor: pointer; font-size: 19px; font-weight: 800; }
.links { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 12px; margin-top: 72px; }
.links a { padding: 22px; border-radius: 16px; color: white; background: var(--blue); font-weight: 800; line-height: 1.45; text-decoration: none; }
.source { color: #666; font-size: 13px; }
.phone-cta { display: inline-flex; min-height: 48px; margin-top: 20px; padding: 0 22px; align-items: center; border-radius: 999px; color: #fff; background: var(--blue); font-size: 17px; font-weight: 900; text-decoration: none; }
footer { padding: 42px 22px; color: white; background: #171717; text-align: center; }
@media(max-width:720px){.topbar{align-items:flex-start;gap:12px;padding:14px 16px}.brand{flex:0 0 auto}.topbar nav{display:flex;max-width:72%;gap:8px 12px;justify-content:flex-end;flex-wrap:wrap;font-size:12px}.hero{padding-top:64px}.shell{width:min(100% - 32px,1120px);padding-top:50px}.steps,.cards,.links{grid-template-columns:1fr}th,td{padding:13px;font-size:15px}h1{font-size:clamp(40px,13vw,64px)}p,li,td,th{line-height:1.7}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}