/* ============================================================
   XXAI — 机场推荐落地页样式
   纯原生 CSS，无预处理器，无构建步骤
   ============================================================ */

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }

/* ---------- Design tokens ---------- */
:root {
  --bg: #000000;
  --bg-alt: #09090b;
  --surface: #18181b;
  --surface-2: #27272a;
  --border: rgba(255, 255, 255, 0.09);
  --text: #eef2fb;
  --text-dim: #9aa7c4;
  --text-faint: #6b7690;
  --primary: #4f7dff;
  --primary-dim: #3a5bd9;
  --accent: #22d3ee;
  --accent-2: #a855f7;
  --gold: #ffb020;
  --success: #2fd480;
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;
  --container: 1200px;
  --nav-h: 72px;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
  font-size: 16px;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Public Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

section { position: relative; padding: 96px 0; }

.eyebrow {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--accent);
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.25);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 16px;
}

.section-head { max-width: 720px; margin: 0 auto 56px; text-align: center; }
.section-head h2 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); margin-bottom: 14px; font-family: "Barlow", sans-serif; font-weight: 900; }
.section-head p { color: var(--text-dim); font-size: 1.05rem; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 1rem;
  min-height: 48px;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent-2));
  color: #fff;
  box-shadow: 0 10px 30px rgba(79, 125, 255, 0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 36px rgba(79, 125, 255, 0.45); }
.btn-ghost {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.08); }
.btn-block { width: 100%; }
.btn-lg { padding: 18px 40px; font-size: 1.1rem; }

/* ---------- Navbar ---------- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background 0.25s ease, border-color 0.25s ease, backdrop-filter 0.25s ease;
}
.navbar.is-scrolled {
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--border);
}
.navbar .container { display: flex; align-items: center; justify-content: space-between; gap: 24px; }

.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.25rem; letter-spacing: 0.02em; }
.brand-mark {
  width: 36px; height: 36px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-family: "Barlow", sans-serif; font-weight: 900; font-size: 1.1rem;
  box-shadow: 0 6px 18px rgba(79, 125, 255, 0.4);
  flex: none;
}

.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a { font-size: 0.95rem; color: var(--text-dim); font-weight: 500; }
.nav-links a:hover { color: var(--text); }

.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-actions .btn { padding: 10px 20px; min-height: 40px; font-size: 0.92rem; }

.nav-toggle {
  display: none;
  width: 48px; height: 48px;
  align-items: center; justify-content: center;
  flex: none;
}
.nav-toggle span, .nav-toggle::before, .nav-toggle::after {
  content: ""; display: block; width: 22px; height: 2px; background: var(--text);
  position: relative; transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav-toggle::before { position: absolute; transform: translateY(-7px); }
.nav-toggle::after { position: absolute; transform: translateY(7px); }
.nav-toggle.is-active span { opacity: 0; }
.nav-toggle.is-active::before { transform: rotate(45deg); }
.nav-toggle.is-active::after { transform: rotate(-45deg); }
.nav-menu-mobile { display: none; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--nav-h) + 40px);
  overflow: hidden;
  background:
    radial-gradient(circle at 15% 20%, rgba(79, 125, 255, 0.28), transparent 45%),
    radial-gradient(circle at 85% 10%, rgba(168, 85, 247, 0.25), transparent 40%),
    radial-gradient(circle at 50% 100%, rgba(34, 211, 238, 0.18), transparent 45%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-alt) 100%);
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, black 0%, transparent 75%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 48px;
}
.hero-content h1 {
  font-size: clamp(2.1rem, 4.4vw, 3.4rem);
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: -0.01em;
  font-family: "Barlow", sans-serif;
  font-weight: 900;
}
.hero-content h1 .accent-text {
  background: linear-gradient(135deg, var(--accent), var(--primary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-content p.lead {
  font-size: 1.15rem;
  color: var(--text-dim);
  max-width: 560px;
  margin-bottom: 28px;
}
.discount-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, rgba(255, 176, 32, 0.16), rgba(255, 176, 32, 0.05));
  border: 1px solid rgba(255, 176, 32, 0.4);
  color: var(--gold);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 10px 18px;
  border-radius: 999px;
  margin-bottom: 28px;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 36px; }
.hero-stats { display: flex; gap: 32px; flex-wrap: wrap; }
.hero-stats div strong { display: block; font-size: 1.5rem; font-weight: 800; }
.hero-stats div span { font-size: 0.85rem; color: var(--text-faint); }

.hero-visual { position: relative; display: flex; align-items: center; justify-content: center; }
.hero-visual svg { 
  width: 100%; 
  max-width: 440px; 
  height: auto; 
  animation: floaty-bob 6s ease-in-out infinite;
}

.anim-spin-slow, .anim-spin-slow-reverse, .anim-pulse {
  transform-box: fill-box;
  transform-origin: center;
}
.anim-spin-slow {
  animation: spin 24s linear infinite;
}
.anim-spin-slow-reverse {
  animation: spin-reverse 28s linear infinite;
}
.anim-pulse {
  animation: pulse-glow 4s ease-in-out infinite;
}

@keyframes floaty-bob {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-16px) rotate(1.5deg); }
}
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
@keyframes spin-reverse {
  from { transform: rotate(360deg); }
  to { transform: rotate(0deg); }
}
@keyframes pulse-glow {
  0%, 100% { opacity: 0.85; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.05); }
}

/* ---------- Feature cards ---------- */
.features { background: var(--bg-alt); }
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 24px;
}
.card {
  background: linear-gradient(180deg, var(--surface), var(--surface-2));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}
.feature-card .icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(79, 125, 255, 0.12);
  border: 1px solid rgba(79, 125, 255, 0.25);
  color: var(--accent);
  margin-bottom: 20px;
}
.feature-card h3 { font-size: 1.15rem; margin-bottom: 10px; }
.feature-card p { color: var(--text-dim); font-size: 0.95rem; }

.feature-highlight {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 32px;
  background: linear-gradient(120deg, rgba(79, 125, 255, 0.12), rgba(168, 85, 247, 0.1));
  border: 1px solid rgba(79, 125, 255, 0.25);
  border-radius: var(--radius-lg);
  padding: 40px;
}
.feature-highlight h3 { font-size: 1.4rem; margin-bottom: 12px; }
.feature-highlight p { color: var(--text-dim); margin-bottom: 20px; }
.tag-row { display: flex; flex-wrap: wrap; gap: 10px; }
.tag-pill {
  font-size: 0.85rem;
  font-weight: 600;
  padding: 7px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
}

/* ---------- Pricing ---------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}
.price-card {
  display: flex;
  flex-direction: column;
  position: relative;
}
.price-card.is-featured {
  border-color: var(--primary);
  background: linear-gradient(180deg, rgba(79, 125, 255, 0.14), var(--surface-2));
  transform: translateY(-8px);
  box-shadow: var(--shadow);
}
.price-badge {
  position: absolute;
  top: -14px; left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary), var(--accent-2));
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 6px 18px;
  border-radius: 999px;
  box-shadow: 0 8px 20px rgba(79, 125, 255, 0.4);
}
.price-name { font-size: 1.1rem; font-weight: 700; color: var(--text-dim); margin-bottom: 8px; }
.price-amount { font-size: 2.4rem; font-weight: 800; margin-bottom: 4px; }
.price-amount span { font-size: 1rem; font-weight: 500; color: var(--text-faint); }
.price-note { font-size: 0.85rem; color: var(--text-faint); margin-bottom: 24px; }
.price-features { display: flex; flex-direction: column; gap: 12px; margin-bottom: 28px; flex: 1; }
.price-features li { display: flex; gap: 10px; font-size: 0.92rem; color: var(--text-dim); align-items: flex-start; }
.price-features li .check { color: var(--success); flex: none; margin-top: 2px; }

/* ---------- Why choose ---------- */
.why-choose { background: var(--bg-alt); }
.why-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.why-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  background: var(--surface);
}
.why-item h3 { font-size: 1.05rem; margin-bottom: 10px; display: flex; align-items: center; gap: 10px; }
.why-item h3::before {
  content: "";
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(34, 211, 238, 0.18);
  flex: none;
}
.why-item p { color: var(--text-dim); font-size: 0.92rem; }

/* ---------- Bottom CTA ---------- */
.cta-band {
  text-align: center;
  background:
    radial-gradient(circle at 50% 0%, rgba(79, 125, 255, 0.25), transparent 60%),
    var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.cta-band h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); margin-bottom: 14px; }
.cta-band p { color: var(--text-dim); margin-bottom: 32px; }

/* ---------- Testimonials marquee ---------- */
.testimonials { overflow: hidden; }
.marquee-wrap {
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, black 8%, black 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, black 8%, black 92%, transparent);
}
.marquee-track {
  display: flex;
  gap: 20px;
  width: max-content;
  animation: marquee 46s linear infinite;
}
.marquee-wrap:hover .marquee-track { animation-play-state: paused; }
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
.t-card {
  width: 320px;
  flex: none;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.t-stars { color: var(--gold); font-size: 0.95rem; margin-bottom: 12px; letter-spacing: 2px; }
.t-quote { color: var(--text-dim); font-size: 0.92rem; margin-bottom: 18px; min-height: 4.5em; }
.t-author { display: flex; align-items: center; gap: 10px; }
.t-avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent-2));
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.85rem; color: #fff; flex: none;
}
.t-author strong { font-size: 0.9rem; display: block; }
.t-author span { font-size: 0.78rem; color: var(--text-faint); }

/* ---------- FAQ ---------- */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 4px 24px;
}
.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 20px 0;
  font-weight: 600;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-size: 1.4rem;
  color: var(--accent);
  flex: none;
  transition: transform 0.2s ease;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { color: var(--text-dim); font-size: 0.94rem; padding-bottom: 20px; }

/* ---------- Footer ---------- */
.site-footer { padding: 56px 0 32px; border-top: 1px solid var(--border); }
.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}
.footer-links { display: flex; gap: 28px; flex-wrap: wrap; }
.footer-links a { color: var(--text-dim); font-size: 0.92rem; }
.footer-links a:hover { color: var(--text); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  font-size: 0.82rem;
  color: var(--text-faint);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- Legal pages ---------- */
.legal-main { padding: calc(var(--nav-h) + 56px) 0 96px; }
.legal-main .container { max-width: 820px; }
.legal-main h1 { font-size: 2rem; margin-bottom: 8px; }
.legal-updated { color: var(--text-faint); font-size: 0.88rem; margin-bottom: 40px; }
.legal-main h2 { font-size: 1.25rem; margin: 36px 0 12px; }
.legal-main p, .legal-main li { color: var(--text-dim); font-size: 0.96rem; margin-bottom: 12px; }
.legal-main ul { padding-left: 4px; }
.legal-main li { display: flex; gap: 10px; }
.legal-main li::before { content: "—"; color: var(--accent); flex: none; }
.legal-main a { color: var(--accent); }
.sitemap-list { display: flex; flex-direction: column; gap: 10px; }
.sitemap-list a { font-size: 1rem; color: var(--text); border-bottom: 1px solid var(--border); padding: 10px 0; display: block; }

/* ---------- Accessibility: skip link ---------- */
.skip-link {
  position: absolute;
  top: -48px; left: 12px;
  z-index: 300;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 10px 18px;
  border-radius: 8px;
  transition: top 0.15s ease;
}
.skip-link:focus { top: 12px; }

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  padding: calc(var(--nav-h) + 24px) 0 0;
}
.breadcrumb ol { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; font-size: 0.85rem; color: var(--text-faint); }
.breadcrumb a { color: var(--text-dim); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb li:not(:last-child)::after { content: "/"; margin-left: 6px; color: var(--text-faint); }
.breadcrumb li[aria-current] { color: var(--text); }

/* ---------- Article hub ---------- */
.articles-hero { padding: 24px 0 56px; text-align: center; }
.articles-hero h1 { font-size: clamp(1.9rem, 3.6vw, 2.6rem); margin: 16px 0 14px; font-family: "Barlow", sans-serif; font-weight: 900; }
.articles-hero p { color: var(--text-dim); max-width: 680px; margin: 0 auto; font-size: 1.05rem; }

.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.article-tile {
  display: flex;
  flex-direction: column;
  background: linear-gradient(180deg, var(--surface), var(--surface-2));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  height: 100%;
}
.article-tile .tile-tag { font-size: 0.78rem; font-weight: 700; color: var(--accent); letter-spacing: 0.04em; margin-bottom: 10px; }
.article-tile h2 { font-size: 1.15rem; margin-bottom: 10px; line-height: 1.4; }
.article-tile p { color: var(--text-dim); font-size: 0.92rem; margin-bottom: 18px; flex: 1; }
.article-tile .tile-link { font-size: 0.9rem; font-weight: 700; color: var(--accent); }
.article-tile.is-pending { opacity: 0.55; }
.article-tile.is-pending .tile-link { color: var(--text-faint); }

/* ---------- Article page ---------- */
.article-main { padding: 0 0 96px; }
.article-header { max-width: 760px; margin: 24px auto 40px; text-align: left; }
.article-header .tile-tag { font-size: 0.8rem; font-weight: 700; color: var(--accent); letter-spacing: 0.04em; display: block; margin-bottom: 14px; }
.article-header h1 { font-size: clamp(1.8rem, 3.4vw, 2.4rem); line-height: 1.35; margin-bottom: 16px; font-family: "Barlow", sans-serif; font-weight: 900; }
.article-meta { display: flex; flex-wrap: wrap; gap: 16px; color: var(--text-faint); font-size: 0.85rem; }

.article-toc {
  max-width: 760px;
  margin: 0 auto 40px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
}
.article-toc p { font-weight: 700; margin-bottom: 10px; font-size: 0.92rem; }
.article-toc ol { display: flex; flex-direction: column; gap: 6px; padding-left: 4px; counter-reset: toc; }
.article-toc li { counter-increment: toc; font-size: 0.9rem; }
.article-toc li a { color: var(--text-dim); }
.article-toc li a:hover { color: var(--accent); }
.article-toc li::before { content: counter(toc) ". "; color: var(--accent); font-weight: 700; }

.article-body { max-width: 760px; margin: 0 auto; color: var(--text-dim); font-size: 1.02rem; }
.article-body h2 { color: var(--text); font-size: 1.5rem; margin: 44px 0 16px; font-family: "Barlow", sans-serif; font-weight: 800; scroll-margin-top: calc(var(--nav-h) + 16px); }
.article-body h3 { color: var(--text); font-size: 1.2rem; margin: 28px 0 12px; font-weight: 700; scroll-margin-top: calc(var(--nav-h) + 16px); }
.article-body p { margin-bottom: 16px; line-height: 1.85; }
.article-body ul, .article-body ol { margin: 0 0 16px; padding-left: 20px; }
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li { margin-bottom: 8px; line-height: 1.75; }
.article-body strong { color: var(--text); }
.article-body a:not(.btn) { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.article-body blockquote {
  border-left: 3px solid var(--accent);
  padding: 4px 20px;
  margin: 24px 0;
  color: var(--text);
  font-size: 1.05rem;
}

.article-faq { margin-top: 44px; }
.article-faq h2 { color: var(--text); font-size: 1.5rem; margin-bottom: 20px; font-family: "Barlow", sans-serif; font-weight: 800; }

.article-cta {
  margin: 44px 0;
  background: linear-gradient(120deg, rgba(79, 125, 255, 0.14), rgba(168, 85, 247, 0.1));
  border: 1px solid rgba(79, 125, 255, 0.25);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.article-cta p { margin: 0; color: var(--text); font-weight: 600; }

.back-to-top { display: inline-block; margin-top: 40px; color: var(--accent); font-weight: 700; font-size: 0.92rem; }

/* ============================================================
   Media queries — 375px / 768px / 1440px
   ============================================================ */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-content p.lead { margin-left: auto; margin-right: auto; }
  .hero-cta, .hero-stats { justify-content: center; }
  .hero-visual { order: -1; max-width: 320px; margin: 0 auto; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .feature-highlight { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; }
  .price-card.is-featured { transform: none; }
  .why-grid { grid-template-columns: 1fr; }
  .article-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  section { padding: 64px 0; }
  .nav-links, .nav-actions .btn-ghost { display: none; }
  .nav-toggle { display: flex; }
  .navbar { background: rgba(0, 0, 0, 0.9); backdrop-filter: blur(14px); border-bottom: 1px solid var(--border); }
  .nav-menu-mobile {
    position: fixed;
    top: var(--nav-h); left: 0; right: 0;
    background: rgba(0, 0, 0, 0.98);
    border-bottom: 1px solid var(--border);
    padding: 8px 24px 24px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.2s ease, opacity 0.2s ease;
    z-index: 199;
  }
  .nav-menu-mobile.is-open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-menu-mobile a { padding: 14px 4px; border-bottom: 1px solid var(--border); font-size: 1rem; }
  .nav-menu-mobile .btn { margin-top: 12px; }
  .feature-grid { grid-template-columns: 1fr; }
  .footer-top { flex-direction: column; }
  .article-grid { grid-template-columns: 1fr; }
  .article-cta { flex-direction: column; align-items: stretch; text-align: center; }
}

@media (max-width: 480px) {
  :root { --nav-h: 64px; }
  .container { padding: 0 18px; }
  .hero-content h1 { font-size: 1.9rem; }
  .btn { width: 100%; }
  .hero-cta { flex-direction: column; }
  .hero-stats { gap: 24px; }
  .card, .price-card, .feature-highlight, .why-item { padding: 24px; }
  .t-card { width: 260px; }
}

@media (min-width: 1440px) {
  :root { --container: 1320px; }
  .hero-content h1 { font-size: 3.6rem; }
}