:root{--bg:#061a1f;--panel:#fff;--line:#d9e4e8;--text:#17262b;--muted:#5f7178;--accent:#23c7a4;--accent2:#17a46b;--soft:#f4faf8;--shadow:0 18px 42px rgba(14,27,31,.10);}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Arial,Helvetica,sans-serif;background:linear-gradient(180deg,#0b232a 0%,#f4faf8 22%,#fff 100%);color:var(--text);line-height:1.65}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.container{width:min(1120px,calc(100% - 32px));margin:0 auto}
.skip-link{position:absolute;left:-999px;top:8px;background:#fff;color:#000;padding:8px 12px;border-radius:8px;z-index:10}.skip-link:focus{left:16px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.site-header{position:sticky;top:0;z-index:30;background:rgba(7,26,31,.84);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.08)}.header-c .header-inner{display:flex;align-items:center;gap:18px;min-height:70px}.site-nav{margin-left:auto;display:flex;gap:18px;color:#d9eef1;font-size:14px}.menu-toggle{display:none;background:transparent;border:1px solid rgba(255,255,255,.18);border-radius:14px;padding:10px 11px;width:46px;height:42px}.menu-toggle span{display:block;height:2px;background:#fff;margin:5px 0;border-radius:2px}
.hero-code{padding:36px 0 22px}.code-grid{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(280px,.8fr);gap:22px;align-items:start}.code-copy,.mini-panel,.question-list article,.receive-list,.small-card,.retry-box,.link-list details,.footer-inner{box-shadow:var(--shadow)}.code-copy{background:#fff;border:1px solid var(--line);border-radius:28px;padding:32px}.eyebrow{display:inline-flex;font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);margin:0 0 10px}.code-copy h1{margin:0;font-size:clamp(34px,5vw,56px);line-height:1.06;letter-spacing:-.03em}.lead{margin:14px 0 0;color:var(--muted);max-width:54ch;font-size:17px}
.code-flow{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:24px}.code-flow span{display:flex;align-items:center;justify-content:center;padding:12px 10px;border-radius:999px;background:#edf6f2;border:1px solid var(--line);font-size:13px;font-weight:700;color:var(--muted)}.code-flow .done{background:rgba(35,199,164,.12);color:var(--accent);border-color:rgba(35,199,164,.18)}
.mini-panel{background:#fff;border:1px solid var(--line);border-radius:28px;padding:18px;display:grid;gap:14px}.mini-panel img{border-radius:22px;border:1px solid var(--line)}.mini-panel p{margin:6px 0 0;color:var(--muted)}
.section{padding:28px 0}.soft{background:var(--soft)}.muted{background:#fff}.section-head{margin-bottom:18px}.section-head.left{text-align:left}.section-head h2{margin:0;font-size:clamp(24px,3vw,38px);line-height:1.12}.section-head p{margin:8px 0 0;color:var(--muted)}
.question-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.question-list article{background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px}.question-list h3,.receive-grid h3,.small-card h3{margin:0 0 8px}
.receive-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(260px,.9fr);gap:18px;align-items:start}.receive-list{list-style:none;margin:0;padding:0;background:#fff;border:1px solid var(--line);border-radius:26px;padding:18px;display:grid;gap:10px}.receive-list li{padding:12px 14px;border-radius:16px;background:#f8fbfb;border:1px solid var(--line)}.small-card{background:#fff;border:1px solid var(--line);border-radius:26px;padding:22px}
.retry-box{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:22px 24px;border-radius:26px;background:linear-gradient(135deg,#fff,#f0fbf7);border:1px solid var(--line)}.retry-steps{display:flex;flex-wrap:wrap;gap:10px}.retry-steps span{display:inline-flex;align-items:center;padding:10px 12px;border-radius:999px;background:#f1faf8;border:1px solid var(--line);font-size:13px}
.link-list{display:grid;gap:12px}.link-list details{background:#fff;border:1px solid var(--line);border-radius:20px;padding:4px 18px}.link-list summary{cursor:pointer;list-style:none;font-weight:700;padding:16px 0}.link-list summary::-webkit-details-marker{display:none}.link-list p{margin:0 0 16px;color:var(--muted)}
.site-footer{padding:30px 0 44px}.footer-inner{display:grid;grid-template-columns:1.1fr 1fr auto;gap:18px;background:#fff;border:1px solid var(--line);border-radius:28px;padding:24px;align-items:center}.footer-logo{height:30px;width:auto;margin-bottom:8px}.footer-brand p,.footer-copy{margin:0;color:var(--muted)}.footer-links{display:grid;gap:10px}.footer-links a{color:var(--muted)}
@media (max-width:980px){.code-grid,.receive-grid,.footer-inner{grid-template-columns:1fr}.question-list{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:760px){.header-c .header-inner{min-height:68px}.site-nav{display:none}.site-nav.is-open{display:flex;position:absolute;left:16px;right:16px;top:74px;flex-direction:column;align-items:stretch;background:#fff;border:1px solid var(--line);border-radius:20px;padding:14px;color:var(--text)}.menu-toggle{display:block;margin-left:auto}.code-copy,.mini-panel,.small-card,.retry-box,.footer-inner{padding:20px;border-radius:22px}.question-list{grid-template-columns:1fr}.code-flow{grid-template-columns:repeat(2,1fr)}.retry-box{flex-direction:column;align-items:flex-start}}