:root {
    --orange: #fb9609;
    --black: #111111;
    --dark: #1C1C1C;
    --mid: #2B2B2B;
    --light: #F5F5F5;
    --white: #ffffff;
    --text: #222222;
    --muted: #666666;
    --line: rgba(17, 17, 17, 0.08);
    --shadow: 0 18px 45px rgba(17, 17, 17, 0.10);
    --radius: 20px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    color: var(--text);
    background: var(--light);
    line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(17, 17, 17, 0.96);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.container {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
}
.header-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 72px;
    gap: 16px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--white);
    font-weight: 800;
    letter-spacing: 0.5px;
}
.logo img { width: 42px; height: 42px; object-fit: contain; }
nav { display: none; align-items: center; gap: 10px; }
nav a, .mobile-nav a {
    color: rgba(255,255,255,0.86);
    padding: 10px 12px;
    border-radius: 999px;
    font-size: 14px;
}
nav a.active, nav a:hover, .mobile-nav a:hover { background: rgba(251,150,9,0.16); color: var(--white); }
.mobile-nav { display: flex; align-items: center; gap: 4px; }
.hero, .banner {
    background:
        radial-gradient(circle at 15% 15%, rgba(251,150,9,0.22), transparent 34%),
        linear-gradient(135deg, var(--black), var(--dark));
    color: var(--white);
    padding: 52px 0;
}
.hero-grid, .banner-grid {
    display: grid;
    gap: 28px;
    align-items: center;
}
.hero h1, .banner h1, .page-hero h1 {
    margin: 0 0 16px;
    line-height: 1.12;
    font-size: clamp(32px, 8vw, 60px);
    letter-spacing: -0.04em;
}
.hero p, .banner p { color: rgba(255,255,255,0.78); margin: 0 0 18px; }
.tag-list { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0; }
.tag {
    display: inline-flex;
    align-items: center;
    border: 1px solid rgba(251,150,9,0.34);
    background: rgba(251,150,9,0.12);
    color: #ffd6a1;
    border-radius: 999px;
    padding: 8px 12px;
    font-size: 13px;
}
.hero-card {
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 28px;
    padding: 20px;
    box-shadow: var(--shadow);
}
section { padding: 42px 0; }
.section-title { margin: 0 0 14px; font-size: clamp(26px, 5vw, 40px); line-height: 1.2; letter-spacing: -0.02em; }
.section-lead { margin: 0 0 24px; color: var(--muted); max-width: 760px; }
.grid { display: grid; gap: 18px; }
.card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: 0 12px 28px rgba(17,17,17,0.06);
}
.card h2, .card h3 { margin-top: 0; color: var(--black); line-height: 1.25; }
.card p:last-child { margin-bottom: 0; }
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 12px 20px;
    border-radius: 999px;
    background: var(--orange);
    color: var(--black);
    font-weight: 800;
    border: 0;
    box-shadow: 0 12px 28px rgba(251,150,9,0.28);
}
.btn:hover { transform: translateY(-1px); }
.notice {
    border-left: 5px solid var(--orange);
    background: #fff7ed;
    border-radius: 18px;
    padding: 18px 20px;
    color: #4a3216;
}
.page-hero {
    background: linear-gradient(135deg, var(--black), var(--mid));
    color: var(--white);
    padding: 46px 0;
}
.page-hero p { color: rgba(255,255,255,0.76); max-width: 760px; }
.faq { display: grid; gap: 14px; }
.faq details {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 18px 20px;
    box-shadow: 0 10px 22px rgba(17,17,17,0.05);
}
.faq summary { cursor: pointer; font-weight: 800; color: var(--black); }
.faq p { color: var(--muted); }
.footer {
    background: var(--black);
    color: rgba(255,255,255,0.76);
    padding: 42px 0 22px;
}
.footer-grid { display: grid; gap: 24px; }
.footer h3, .footer-brand { color: var(--white); margin: 0 0 10px; font-weight: 800; }
.footer a { display: block; margin: 8px 0; color: rgba(255,255,255,0.78); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); margin-top: 24px; padding-top: 18px; font-size: 14px; }
.link-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.link-row a { color: var(--orange); font-weight: 700; }
.check-list { padding-left: 20px; }
.check-list li { margin: 8px 0; }
@media (min-width: 768px) {
    nav { display: flex; }
    .mobile-nav { display: none; }
    .hero-grid, .banner-grid { grid-template-columns: 1.1fr 0.9fr; }
    .grid.two { grid-template-columns: repeat(2, 1fr); }
    .grid.three { grid-template-columns: repeat(3, 1fr); }
    .footer-grid { grid-template-columns: 1.4fr 0.8fr 1fr; }
    section { padding: 58px 0; }
}
@media (min-width: 1024px) {
    .grid.four { grid-template-columns: repeat(4, 1fr); }
    .hero, .banner { padding: 78px 0; }
    .card { padding: 28px; }
}