:root {
    --primary: #0e8f6f;
    --primary-dark: #0a6e56;
    --primary-rgb: 14, 143, 111;
    --accent: #e8952c;
    --accent-rgb: 232, 149, 44;
    --bg-page: #faf8f3;
    --bg-card: #ffffff;
    --bg-alt: #f2ede1;
    --bg-dark: #0d211c;
    --bg-dark-card: #143a30;
    --text-main: #1c2622;
    --text-muted: #5b6b64;
    --text-soft: #8b978f;
    --border-color: #e4ddcc;
    --border-dark: #244a3d;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg-page);
    color: var(--text-main);
    line-height: 1.7;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; }
.container { max-width: 1120px; margin: 0 auto; padding: 0 5%; }
section { padding: 64px 5%; }

/* Navbar */
.navbar {
    position: sticky; top: 0; width: 100%; z-index: 1000;
    background: rgba(250, 248, 243, 0.92);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border-color);
    display: flex; justify-content: space-between; align-items: center;
    padding: 0 5%; height: 66px;
}
.nav-brand { font-size: 19px; font-weight: 800; color: var(--text-main); display: flex; align-items: center; gap: 9px; letter-spacing: 0.5px; }
.nav-brand svg { color: var(--primary); flex-shrink: 0; }
.nav-links { display: flex; gap: 26px; }
.nav-links a { font-weight: 600; font-size: 14.5px; color: var(--text-muted); transition: color 0.2s; }
.nav-links a:hover { color: var(--primary); }
.menu-toggle { display: none; font-size: 24px; cursor: pointer; color: var(--text-main); background: none; border: none; }
.nav-menu-wrapper { display: flex; align-items: center; gap: 26px; }
.nav-actions .btn { padding: 8px 16px; font-size: 13.5px; }

/* Buttons */
.btn { display: inline-block; padding: 12px 26px; border-radius: 999px; font-weight: 700; text-align: center; transition: all 0.2s; cursor: pointer; border: 1px solid transparent; font-size: 15px; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 6px 18px rgba(var(--primary-rgb), 0.28); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); }
.btn-accent { background: var(--accent); color: #fff; box-shadow: 0 6px 18px rgba(var(--accent-rgb), 0.3); }
.btn-accent:hover { filter: brightness(0.94); transform: translateY(-1px); }
.btn-outline { border: 1px solid var(--border-color); color: var(--text-main); background: transparent; }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-sm { padding: 8px 18px; font-size: 13.5px; }
.btn-block { display: block; width: 100%; }

/* Hero */
.hero { text-align: center; padding: 84px 5% 56px; background: linear-gradient(180deg, #f1ece0 0%, var(--bg-page) 100%); border-bottom: 1px solid var(--border-color); position: relative; overflow: hidden; }
.hero-tag { display: inline-block; background: rgba(var(--primary-rgb), 0.1); color: var(--primary-dark); padding: 6px 16px; border-radius: 20px; font-size: 13px; font-weight: 700; margin-bottom: 22px; border: 1px solid rgba(var(--primary-rgb), 0.25); }
.hero h1 { font-size: 40px; line-height: 1.35; margin-bottom: 18px; color: var(--text-main); max-width: 820px; margin-inline: auto; }
.hero h1 em { color: var(--primary); font-style: normal; }
.hero p { font-size: 17px; color: var(--text-muted); max-width: 660px; margin: 0 auto 30px; }
.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 34px; }
.hero-stats { display: flex; justify-content: center; gap: 26px; flex-wrap: wrap; font-size: 13.5px; color: var(--text-soft); }

/* Compass nav tiles (category directory) */
.nav-tiles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; max-width: 1120px; margin: -34px auto 0; padding: 0 5%; position: relative; z-index: 5; }
.nav-tile { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 16px; padding: 26px 20px; text-align: center; box-shadow: 0 10px 26px rgba(20, 30, 25, 0.06); transition: transform 0.2s, box-shadow 0.2s; }
.nav-tile:hover { transform: translateY(-4px); box-shadow: 0 16px 34px rgba(20, 30, 25, 0.1); }
.nav-tile .tile-icon { font-size: 30px; margin-bottom: 10px; }
.nav-tile h3 { font-size: 16px; margin-bottom: 6px; color: var(--text-main); }
.nav-tile p { font-size: 13px; color: var(--text-soft); }

/* Section heading */
.section-head { text-align: center; margin-bottom: 42px; }
.section-head .eyebrow { display: inline-block; font-size: 12.5px; font-weight: 700; color: var(--primary-dark); background: rgba(var(--primary-rgb), 0.1); padding: 4px 14px; border-radius: 20px; margin-bottom: 14px; letter-spacing: 0.5px; }
.section-head h2 { font-size: 28px; margin-bottom: 10px; color: var(--text-main); }
.section-head p { font-size: 15px; color: var(--text-muted); max-width: 600px; margin: 0 auto; }

/* Airport recommendation section */
.airport-showcase { background: var(--bg-dark); color: #e9f3ef; border-radius: 24px; padding: 46px 5%; max-width: 1120px; margin: 0 auto; }
.airport-showcase .section-head h2, .airport-showcase .section-head p { color: #e9f3ef; }
.airport-showcase .section-head p { color: #a9c2b8; }
.airport-showcase .eyebrow { background: rgba(255,255,255,0.1); color: #6fd8b8; }
.airport-intro { display: flex; gap: 36px; align-items: center; flex-wrap: wrap; margin-bottom: 38px; }
.airport-intro-text { flex: 1; min-width: 220px; }
.airport-intro-text h3 { font-size: 22px; margin-bottom: 12px; }
.airport-intro-text p { color: #b9cdc4; font-size: 15px; margin-bottom: 10px; }
.airport-badges { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }
.airport-badges span { background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.14); padding: 5px 12px; border-radius: 8px; font-size: 12.5px; color: #cfe4dc; }
.promo-box { background: linear-gradient(120deg, rgba(var(--accent-rgb),0.16), rgba(var(--accent-rgb),0.06)); border: 1px dashed rgba(var(--accent-rgb), 0.6); border-radius: 14px; padding: 20px 24px; min-width: 200px; text-align: center; }
.promo-box .promo-label { font-size: 13px; color: #e8b76b; margin-bottom: 8px; }
.promo-box .promo-code { font-family: "SFMono-Regular", Consolas, monospace; font-size: 22px; font-weight: 800; color: var(--accent); letter-spacing: 2px; display: block; margin-bottom: 6px; }
.promo-box .promo-note { font-size: 12px; color: #9fb3aa; }

.plan-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-bottom: 20px; }
.plan-card { background: var(--bg-dark-card); border: 1px solid var(--border-dark); border-radius: 14px; padding: 24px 20px; position: relative; }
.plan-card.highlight { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.plan-card .plan-tag { position: absolute; top: -12px; right: 16px; background: var(--accent); color: #fff; font-size: 12px; font-weight: 700; padding: 4px 12px; border-radius: 20px; }
.plan-card h4 { font-size: 17px; margin-bottom: 8px; color: #fff; }
.plan-card .plan-price { font-size: 24px; font-weight: 800; color: #6fd8b8; margin-bottom: 4px; }
.plan-card .plan-price del { font-size: 15px; color: #7c9088; font-weight: 400; margin-right: 6px; }
.plan-card .plan-price span { font-size: 13px; color: #9fb3aa; font-weight: 400; }
.plan-card .plan-quota { font-size: 13px; color: #a9c2b8; margin-bottom: 14px; }
.plan-card ul { margin-bottom: 16px; }
.plan-card li { font-size: 12.5px; color: #b9cdc4; margin-bottom: 6px; padding-left: 14px; position: relative; }
.plan-card li::before { content: "·"; position: absolute; left: 0; color: var(--accent); font-weight: 900; }
.plan-fineprint { font-size: 12.5px; color: #8298 90; color: #83988f; text-align: center; margin-top: 10px; }

/* Client download grid */
.client-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.client-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 14px; padding: 22px 16px; text-align: center; transition: box-shadow 0.2s, transform 0.2s; }
.client-card:hover { transform: translateY(-3px); box-shadow: 0 12px 26px rgba(20,30,25,0.08); }
.client-card .client-icon { font-size: 28px; margin-bottom: 10px; }
.client-card h4 { font-size: 15px; margin-bottom: 6px; }
.client-card .client-os { font-size: 11.5px; color: var(--text-soft); background: var(--bg-alt); display: inline-block; padding: 2px 9px; border-radius: 6px; margin-bottom: 10px; }
.client-card p { font-size: 12.5px; color: var(--text-muted); margin-bottom: 14px; min-height: 52px; }

/* Article/tutorial list */
.tutorial-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.tutorial-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 14px; padding: 24px; display: flex; gap: 16px; transition: box-shadow 0.2s, transform 0.2s; }
.tutorial-card:hover { transform: translateY(-3px); box-shadow: 0 12px 26px rgba(20,30,25,0.07); }
.tutorial-num { font-size: 20px; font-weight: 800; color: var(--primary); opacity: 0.5; flex-shrink: 0; width: 34px; }
.tutorial-card h3 { font-size: 16.5px; margin-bottom: 8px; line-height: 1.4; }
.tutorial-card h3 a { color: var(--text-main); }
.tutorial-card h3 a:hover { color: var(--primary); }
.tutorial-card p { font-size: 13.5px; color: var(--text-muted); margin-bottom: 10px; }
.tutorial-card .read-more { font-size: 13px; font-weight: 700; color: var(--primary); }
.tag-pill { display: inline-block; font-size: 11.5px; color: var(--primary-dark); background: rgba(var(--primary-rgb),0.08); padding: 2px 9px; border-radius: 6px; margin-bottom: 8px; }

/* Tools card */
.tool-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 16px; padding: 30px; display: flex; align-items: center; gap: 24px; max-width: 760px; margin: 0 auto; flex-wrap: wrap; }
.tool-card .tool-icon { font-size: 36px; }
.tool-card-text { flex: 1; min-width: 200px; }
.tool-card-text h3 { font-size: 18px; margin-bottom: 6px; }
.tool-card-text p { font-size: 14px; color: var(--text-muted); }

/* FAQ */
.faq-list { max-width: 780px; margin: 0 auto; }
.faq-list details { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 12px; padding: 18px 22px; margin-bottom: 12px; }
.faq-list summary { font-weight: 700; cursor: pointer; font-size: 15.5px; }
.faq-list p { margin-top: 10px; font-size: 14.5px; color: var(--text-muted); }

/* Bottom CTA */
.bottom-cta { text-align: center; background: linear-gradient(120deg, var(--primary) 0%, var(--primary-dark) 100%); color: #fff; border-radius: 24px; max-width: 1120px; margin: 0 auto; padding: 56px 5%; }
.bottom-cta h2 { font-size: 26px; margin-bottom: 12px; }
.bottom-cta p { color: rgba(255,255,255,0.85); margin-bottom: 24px; font-size: 15px; }
.bottom-cta .btn-primary { background: #fff; color: var(--primary-dark); }
.bottom-cta .btn-primary:hover { background: #f1ece0; }

/* Article page */
.article-wrap { max-width: 760px; margin: 0 auto; padding: 48px 5% 80px; }
.breadcrumb { font-size: 13px; color: var(--text-soft); margin-bottom: 22px; }
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary); }
.article-wrap h1 { font-size: 30px; line-height: 1.42; margin-bottom: 14px; color: var(--text-main); }
.article-meta { font-size: 13px; color: var(--text-soft); margin-bottom: 30px; padding-bottom: 22px; border-bottom: 1px solid var(--border-color); display: flex; gap: 16px; flex-wrap: wrap; }
.summary-box { background: var(--bg-alt); border-left: 4px solid var(--primary); border-radius: 10px; padding: 20px 24px; margin-bottom: 32px; font-size: 15px; }
.summary-box strong { color: var(--primary-dark); }
.article-body h2 { font-size: 21px; margin: 34px 0 14px; color: var(--text-main); }
.article-body h3 { font-size: 17px; margin: 24px 0 10px; color: var(--text-main); }
.article-body p { font-size: 15.5px; color: #37423d; margin-bottom: 16px; }
.article-body ul, .article-body ol { padding-left: 22px; margin-bottom: 16px; color: #37423d; }
.article-body li { margin-bottom: 7px; font-size: 15.5px; }
.article-body a { color: var(--primary); text-decoration: underline; }
.article-body table { width: 100%; border-collapse: collapse; margin: 18px 0 26px; font-size: 14px; }
.article-body th, .article-body td { border: 1px solid var(--border-color); padding: 9px 11px; text-align: left; }
.article-body th { background: var(--bg-alt); }
.inline-promo { background: var(--bg-alt); border: 1px solid var(--border-color); border-left: 4px solid var(--accent); border-radius: 10px; padding: 22px 24px; margin: 34px 0; }
.inline-promo h4 { font-size: 16px; margin-bottom: 8px; }
.inline-promo p { font-size: 14px; color: var(--text-muted); margin-bottom: 12px; }
.related-links { margin-top: 40px; padding-top: 26px; border-top: 1px solid var(--border-color); }
.related-links h4 { font-size: 15px; margin-bottom: 12px; color: var(--text-soft); }
.related-links ul { padding-left: 0; }
.related-links li { list-style: none; margin-bottom: 8px; }
.related-links a { color: var(--primary); font-weight: 600; font-size: 14.5px; }

/* Subpage */
.subpage-header { padding: 92px 5% 46px; text-align: center; background: linear-gradient(180deg, #f1ece0 0%, var(--bg-page) 100%); border-bottom: 1px solid var(--border-color); }
.subpage-header h1 { font-size: 30px; margin-bottom: 10px; }
.subpage-header p { color: var(--text-muted); font-size: 15px; }
.subpage-content { padding: 54px 5%; max-width: 760px; margin: 0 auto; color: #37423d; font-size: 15.5px; }
.subpage-content h2 { color: var(--text-main); margin: 30px 0 14px; font-size: 20px; }
.subpage-content p { margin-bottom: 15px; }
.subpage-content ul { padding-left: 20px; margin-bottom: 15px; list-style: disc; }
.subpage-content li { margin-bottom: 7px; }

/* IP tool */
.ip-tool-box { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 18px; padding: 34px; max-width: 640px; margin: 0 auto 30px; text-align: center; }
.ip-value { font-size: 30px; font-weight: 800; color: var(--primary-dark); font-family: "SFMono-Regular", Consolas, monospace; margin: 14px 0; word-break: break-all; }
.ip-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; text-align: left; margin-top: 20px; }
.ip-grid .ip-item { background: var(--bg-alt); border-radius: 10px; padding: 14px 16px; }
.ip-grid .ip-label { font-size: 12px; color: var(--text-soft); margin-bottom: 4px; }
.ip-grid .ip-val { font-size: 15px; font-weight: 700; color: var(--text-main); }
.ip-status { font-size: 13.5px; color: var(--text-muted); margin-top: 16px; }
.ip-status.error { color: #c0392b; }

/* Footer */
footer { border-top: 1px solid var(--border-dark); padding: 50px 5% 34px; background: var(--bg-dark); color: #cfe4dc; text-align: center; }
.footer-logo { font-size: 19px; font-weight: 800; color: #fff; margin-bottom: 22px; display: flex; align-items: center; justify-content: center; gap: 8px; }
.footer-logo svg { color: #6fd8b8; }
.footer-links { display: flex; justify-content: center; gap: 30px; margin-bottom: 26px; flex-wrap: wrap; }
.footer-links a { color: #cfe4dc; transition: color 0.2s; font-size: 14px; }
.footer-links a:hover { color: #fff; }
.footer-friends { margin-bottom: 20px; font-size: 13.5px; color: #83988f; }
.footer-friends a { color: #83988f; transition: color 0.2s; margin: 0 8px; }
.footer-friends a:hover { color: #fff; }
.footer-disclosure { font-size: 12px; color: #5f736a; max-width: 700px; margin: 0 auto 18px; line-height: 1.6; }
.footer-copy { color: #5f736a; font-size: 12.5px; }

/* Mobile */
@media (max-width: 900px) {
    .nav-tiles { grid-template-columns: repeat(2, 1fr); }
    .plan-grid { grid-template-columns: repeat(2, 1fr); }
    .client-grid { grid-template-columns: repeat(2, 1fr); }
    .tutorial-grid { grid-template-columns: 1fr; }
    .airport-intro { flex-direction: column; align-items: stretch; }
}
@media (max-width: 768px) {
    .nav-menu-wrapper { display: none; flex-direction: column; position: absolute; top: 66px; left: 0; width: 100%; background: var(--bg-page); padding: 22px 20px; border-bottom: 1px solid var(--border-color); gap: 16px; }
    .nav-menu-wrapper.active { display: flex; }
    .menu-toggle { display: block; }
    .nav-links { flex-direction: column; gap: 14px; text-align: center; width: 100%; }
    .hero h1 { font-size: 27px; }
    .hero p { font-size: 15px; }
    .nav-tiles { grid-template-columns: 1fr 1fr; margin-top: -24px; }
    .plan-grid { grid-template-columns: 1fr; }
    .client-grid { grid-template-columns: repeat(2, 1fr); }
    .ip-grid { grid-template-columns: 1fr; }
    section { padding: 44px 5%; }
    .article-wrap h1 { font-size: 24px; }
    .footer-links { gap: 14px; flex-direction: column; }
}
@media (max-width: 340px) {
    .airport-intro-text, .promo-box, .tool-card-text { min-width: 0; width: 100%; }
    .client-grid { grid-template-columns: 1fr; }
}