:root {
    --primary: #1abc9c;
    --black: #111111;
    --dark: #1C1C1C;
    --mid: #2B2B2B;
    --light: #F5F5F5;
    --white: #ffffff;
    --shadow: 0 18px 45px rgba(17,17,17,.10);
    --radius: 18px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: Arial, Helvetica, sans-serif; color: var(--black); background: var(--light); line-height: 1.65; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
header, .site-header { background: var(--primary); color: var(--white); position: sticky; top: 0; z-index: 20; box-shadow: 0 8px 30px rgba(0,0,0,.12); }
.container { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; gap: 16px; flex-wrap: wrap; }
.logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: .4px; font-size: 22px; }
.logo img { width: 44px; height: 44px; object-fit: contain; border-radius: 12px; background: rgba(255,255,255,.18); padding: 4px; }
nav, .desktop-nav, .mobile-nav { display: flex; align-items: center; gap: 10px; }
nav a { padding: 9px 12px; border-radius: 999px; font-weight: 700; font-size: 14px; }
nav a:hover { background: rgba(255,255,255,.18); }
.mobile-nav { width: 100%; overflow-x: auto; padding-bottom: 2px; }
.desktop-nav { display: none; }
.hero, .banner { background: linear-gradient(135deg, var(--dark), var(--mid)); color: var(--white); padding: 54px 0 42px; }
.hero-grid { display: grid; gap: 28px; align-items: center; }
.hero h1 { font-size: clamp(34px, 8vw, 64px); line-height: 1.05; margin: 0 0 18px; letter-spacing: -1px; }
.hero p { color: rgba(255,255,255,.86); font-size: 17px; margin: 0 0 18px; }
.hero-image { background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.16); border-radius: 28px; padding: 18px; box-shadow: var(--shadow); }
.tags { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0; }
.tag { background: rgba(26,188,156,.16); color: #fff; border: 1px solid rgba(255,255,255,.18); padding: 8px 12px; border-radius: 999px; font-size: 13px; font-weight: 700; }
section { padding: 42px 0; }
.section-title { font-size: clamp(26px, 5vw, 40px); margin: 0 0 14px; letter-spacing: -.4px; }
.section-lead { margin: 0 0 24px; color: #555; }
.grid { display: grid; gap: 18px; }
.card { background: var(--white); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); border: 1px solid rgba(17,17,17,.05); }
.card h2, .card h3 { margin-top: 0; line-height: 1.25; }
.card p:last-child { margin-bottom: 0; }
.btn { display: inline-flex; align-items: center; justify-content: center; background: var(--primary); color: var(--white); border: 0; border-radius: 999px; padding: 13px 20px; font-weight: 800; box-shadow: 0 12px 25px rgba(26,188,156,.28); margin-top: 12px; }
.btn:hover { transform: translateY(-1px); }
.notice { background: #eefbf8; border-left: 5px solid var(--primary); border-radius: 16px; padding: 18px; color: #163d36; margin: 18px 0; }
.faq { display: grid; gap: 14px; }
.faq-item { background: var(--white); border-radius: 16px; padding: 18px; box-shadow: var(--shadow); }
.faq-item h3 { margin: 0 0 8px; }
.steps { counter-reset: step; list-style: none; padding: 0; display: grid; gap: 14px; }
.steps li { counter-increment: step; background: var(--white); border-radius: 16px; padding: 18px 18px 18px 64px; position: relative; box-shadow: var(--shadow); }
.steps li::before { content: counter(step); position: absolute; left: 18px; top: 18px; width: 32px; height: 32px; border-radius: 50%; background: var(--primary); color: white; display: grid; place-items: center; font-weight: 800; }
.link-list { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.link-list a { color: var(--primary); font-weight: 800; background: rgba(26,188,156,.10); padding: 8px 12px; border-radius: 999px; }
.footer { background: var(--primary); color: var(--white); padding: 36px 0; margin-top: 36px; }
.footer-grid { display: grid; gap: 22px; }
.footer a { display: block; margin: 6px 0; color: var(--white); font-weight: 700; }
.footer p { color: rgba(255,255,255,.88); }
@media (min-width: 768px) {
    .mobile-nav { display: none; }
    .desktop-nav { display: flex; }
    .hero-grid { grid-template-columns: 1.08fr .92fr; }
    .grid.two { grid-template-columns: repeat(2, 1fr); }
    .grid.three { grid-template-columns: repeat(3, 1fr); }
    .footer-grid { grid-template-columns: 1.2fr .8fr 1fr; }
}
@media (min-width: 1024px) {
    section { padding: 56px 0; }
    .hero, .banner { padding: 76px 0 64px; }
    .card { padding: 28px; }
}