/* 同花顺财经 · Site Set 1 ROOT — Corporate Red Finance */
:root {
  --crimson: #B71C1C;
  --crimson-dark: #8E1515;
  --crimson-light: #D32F2F;
  --navy: #0D2137;
  --navy-mid: #163A5F;
  --navy-soft: #1E4A73;
  --white: #FFFFFF;
  --off-white: #F7F9FC;
  --gray-50: #F0F3F7;
  --gray-100: #E4E9F0;
  --gray-200: #CDD5E0;
  --gray-500: #6B7A8D;
  --gray-700: #3A4656;
  --text: #1A2433;
  --radius: 4px;
  --shadow: 0 2px 12px rgba(13, 33, 55, 0.08);
  --shadow-md: 0 4px 20px rgba(13, 33, 55, 0.12);
  --shadow-lg: 0 8px 32px rgba(13, 33, 55, 0.14);
  --header-h: 64px;
  --max: 1120px;
  --font: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background-color: var(--off-white);
  background-image:
    linear-gradient(rgba(13, 33, 55, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(13, 33, 55, 0.03) 1px, transparent 1px);
  background-size: 28px 28px;
  padding-top: var(--header-h);
}

img, svg { max-width: 100%; height: auto; display: block; }
a { color: var(--crimson); text-decoration: none; }
a:hover { color: var(--crimson-dark); text-decoration: underline; }
button { font-family: inherit; cursor: pointer; border: none; }
ul, ol { padding-left: 1.25em; }
h1, h2, h3, h4 {
  font-family: var(--font);
  color: var(--navy);
  line-height: 1.35;
  margin: 0 0 0.6em;
  font-weight: 700;
}
h1 { font-size: 2.25rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1em; color: var(--gray-700); }

.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 20px;
}

/* ========== Header / Nav ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  background: var(--navy);
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.18);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--white);
  font-size: 1.15rem;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 0.02em;
}
.logo:hover { color: var(--white); text-decoration: none; }
.logo svg { flex-shrink: 0; }

.nav-toggle {
  display: none;
  background: transparent;
  color: var(--white);
  padding: 8px;
  border-radius: var(--radius);
}
.nav-toggle svg { width: 24px; height: 24px; }

.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav a {
  display: block;
  padding: 8px 14px;
  color: rgba(255, 255, 255, 0.88);
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
.site-nav a:hover {
  color: var(--white);
  text-decoration: none;
  border-bottom-color: rgba(183, 28, 28, 0.5);
}
.site-nav a.active {
  color: var(--white);
  border-bottom-color: var(--crimson);
  font-weight: 600;
}

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius);
  transition: background 0.2s, box-shadow 0.2s, transform 0.15s;
  text-decoration: none;
  line-height: 1.4;
}
.btn:hover { text-decoration: none; }
.btn svg { width: 20px; height: 20px; flex-shrink: 0; }

.btn-primary {
  background: var(--crimson);
  color: var(--white);
  box-shadow: 0 2px 8px rgba(183, 28, 28, 0.35);
}
.btn-primary:hover {
  background: var(--crimson-dark);
  color: var(--white);
  box-shadow: 0 4px 14px rgba(183, 28, 28, 0.4);
}
.btn-primary:disabled {
  opacity: 0.75;
  cursor: wait;
}

.btn-secondary {
  background: var(--white);
  color: var(--navy);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow);
}
.btn-secondary:hover {
  border-color: var(--crimson);
  color: var(--crimson);
}

.btn-outline-light {
  background: transparent;
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.45);
}
.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
  border-color: var(--white);
}

.btn-lg { padding: 14px 36px; font-size: 1.05rem; }
.btn-block { width: 100%; }

/* ========== Hero ========== */
.hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 55%, #1A3A5C 100%);
  color: var(--white);
  padding: 72px 0 80px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}
.hero .container {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.hero-content h1 {
  color: var(--white);
  font-size: 2.5rem;
  margin-bottom: 0.4em;
  letter-spacing: 0.01em;
}
.hero-tagline {
  font-size: 1.35rem;
  font-weight: 600;
  color: #FFCDD2;
  margin-bottom: 0.75em;
}
.hero-desc {
  color: rgba(255, 255, 255, 0.85);
  font-size: 1.05rem;
  margin-bottom: 1.75em;
  max-width: 34em;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 1.25em;
}
.hero-meta {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.55);
}
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}
.hero-visual svg {
  width: 100%;
  max-width: 460px;
  filter: drop-shadow(0 8px 24px rgba(0, 0, 0, 0.25));
}

/* ========== Sections ========== */
.section {
  padding: 72px 0;
}
.section-alt { background: var(--white); }
.section-navy {
  background: var(--navy);
  color: var(--white);
}
.section-navy h2,
.section-navy h3 { color: var(--white); }
.section-navy p { color: rgba(255, 255, 255, 0.78); }

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 48px;
}
.section-header h2 { margin-bottom: 0.5em; }
.section-header p {
  font-size: 1.05rem;
  color: var(--gray-500);
  margin: 0;
}
.section-navy .section-header p { color: rgba(255, 255, 255, 0.65); }

.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--crimson);
  text-transform: uppercase;
  margin-bottom: 0.5em;
}

/* ========== Stats ========== */
.stats {
  background: var(--white);
  padding: 0;
  margin-top: -36px;
  position: relative;
  z-index: 2;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  border: 1px solid var(--gray-100);
}
.stat-item {
  padding: 32px 20px;
  text-align: center;
  border-right: 1px solid var(--gray-100);
}
.stat-item:last-child { border-right: none; }
.stat-num {
  font-size: 2rem;
  font-weight: 700;
  color: var(--crimson);
  line-height: 1.2;
  margin-bottom: 6px;
}
.stat-label {
  font-size: 0.9rem;
  color: var(--gray-500);
  margin: 0;
}

/* ========== Feature cards ========== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
  transition: box-shadow 0.2s, border-color 0.2s;
}
.feature-card:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(183, 28, 28, 0.25);
}
.feature-icon {
  width: 48px;
  height: 48px;
  background: rgba(183, 28, 28, 0.08);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  color: var(--crimson);
}
.feature-icon svg { width: 26px; height: 26px; }
.feature-card h3 { margin-bottom: 0.5em; font-size: 1.15rem; }
.feature-card p { margin: 0; font-size: 0.95rem; }

/* ========== Deep dive ========== */
.deep-list { display: flex; flex-direction: column; gap: 40px; }
.deep-item {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 28px;
  align-items: start;
  background: var(--white);
  padding: 36px 32px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
}
.deep-num {
  width: 64px;
  height: 64px;
  background: var(--navy);
  color: var(--white);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  flex-shrink: 0;
}
.deep-body h3 { margin-bottom: 0.5em; }
.deep-body p { margin-bottom: 0.75em; }
.deep-body p:last-child { margin-bottom: 0; }
.deep-body ul { margin: 0.5em 0 0; color: var(--gray-700); }

/* ========== Comparison table ========== */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
  background: var(--white);
}
.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  min-width: 640px;
}
.compare-table th,
.compare-table td {
  padding: 14px 18px;
  text-align: center;
  border-bottom: 1px solid var(--gray-100);
}
.compare-table th {
  background: var(--navy);
  color: var(--white);
  font-weight: 600;
}
.compare-table th:first-child,
.compare-table td:first-child {
  text-align: left;
  font-weight: 500;
}
.compare-table tr:last-child td { border-bottom: none; }
.compare-table tbody tr:nth-child(even) { background: var(--gray-50); }
.compare-table .highlight-col {
  background: rgba(183, 28, 28, 0.06);
  font-weight: 600;
  color: var(--crimson);
}
.compare-table th.highlight-col {
  background: var(--crimson);
  color: var(--white);
}
.check-yes { color: var(--crimson); font-weight: 700; }
.check-no { color: var(--gray-200); }

/* ========== Reviews ========== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.review-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
  display: flex;
  flex-direction: column;
}
.review-stars {
  display: flex;
  gap: 3px;
  margin-bottom: 14px;
  color: #E6A817;
}
.review-stars svg { width: 18px; height: 18px; }
.review-card blockquote {
  margin: 0 0 18px;
  font-size: 0.95rem;
  color: var(--gray-700);
  line-height: 1.7;
  flex: 1;
}
.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: auto;
}
.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--navy);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 600;
  flex-shrink: 0;
}
.review-meta strong {
  display: block;
  font-size: 0.9rem;
  color: var(--navy);
}
.review-meta span {
  font-size: 0.8rem;
  color: var(--gray-500);
}

/* ========== Platforms ========== */
.platforms-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.platform-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  padding: 32px 22px;
  text-align: center;
  transition: background 0.2s, border-color 0.2s;
}
.platform-card:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(183, 28, 28, 0.5);
}
.platform-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
}
.platform-icon svg { width: 30px; height: 30px; }
.platform-card h3 {
  color: var(--white);
  font-size: 1.1rem;
  margin-bottom: 0.4em;
}
.platform-card p {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 1.25em;
  min-height: 2.6em;
}
.platform-card .btn { width: 100%; }

/* ========== FAQ ========== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
  overflow: hidden;
}
.faq-item details { padding: 0; }
.faq-item summary {
  padding: 18px 24px;
  font-weight: 600;
  color: var(--navy);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "";
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--crimson);
  border-bottom: 2px solid var(--crimson);
  transform: rotate(45deg);
  flex-shrink: 0;
  transition: transform 0.2s;
  margin-top: -4px;
}
.faq-item details[open] summary::after {
  transform: rotate(-135deg);
  margin-top: 4px;
}
.faq-item .faq-answer {
  padding: 0 24px 20px;
  color: var(--gray-700);
  font-size: 0.95rem;
  border-top: 1px solid var(--gray-100);
  margin-top: 0;
  padding-top: 16px;
}
.faq-item .faq-answer p:last-child { margin-bottom: 0; }

/* ========== Footer ========== */
.site-footer {
  background: var(--navy);
  color: rgba(255, 255, 255, 0.7);
  padding: 40px 0 32px;
  font-size: 0.875rem;
  text-align: center;
}
.site-footer p { color: rgba(255, 255, 255, 0.65); margin: 0 0 10px; line-height: 1.7; }
.site-footer .footer-safe {
  color: #A5D6A7;
  font-weight: 500;
}
.site-footer .footer-copy { font-size: 0.8rem; color: rgba(255, 255, 255, 0.45); }
.footer-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.footer-links a {
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
}
.footer-links a:hover { color: var(--white); }

/* ========== Download page ========== */
.page-hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 100%);
  color: var(--white);
  padding: 56px 0 48px;
  text-align: center;
}
.page-hero h1 { color: var(--white); font-size: 2.1rem; }
.page-hero p {
  color: rgba(255, 255, 255, 0.8);
  max-width: 640px;
  margin: 0 auto;
  font-size: 1.05rem;
}

.download-featured {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--gray-100);
  padding: 40px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 36px;
  align-items: center;
  margin-top: -28px;
  position: relative;
  z-index: 2;
}
.download-featured h2 { margin-bottom: 0.4em; }
.download-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin: 16px 0 24px;
  font-size: 0.9rem;
  color: var(--gray-500);
}
.download-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.download-meta svg { width: 16px; height: 16px; color: var(--crimson); }
.download-cta { text-align: center; min-width: 220px; }
.download-cta .btn { margin-bottom: 10px; }
.download-cta .hint {
  font-size: 0.8rem;
  color: var(--gray-500);
  margin: 0;
}

.dl-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.dl-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
  padding: 28px 24px;
}
.dl-card h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 0.6em;
}
.dl-card h3 svg { width: 24px; height: 24px; color: var(--crimson); }
.dl-card ol, .dl-card ul {
  margin: 0 0 1.25em;
  color: var(--gray-700);
  font-size: 0.95rem;
}
.dl-card ol li, .dl-card ul li { margin-bottom: 0.4em; }

.steps-list {
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.steps-list li {
  counter-increment: step;
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 18px;
  background: var(--white);
  padding: 24px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
}
.steps-list li::before {
  content: counter(step);
  width: 40px;
  height: 40px;
  background: var(--crimson);
  color: var(--white);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
}
.steps-list h3 { font-size: 1.05rem; margin-bottom: 0.35em; }
.steps-list p { margin: 0; font-size: 0.95rem; }

.req-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.req-box {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
}
.req-box h3 { margin-bottom: 0.75em; font-size: 1.1rem; }
.req-box ul { margin: 0; color: var(--gray-700); }
.req-box li { margin-bottom: 0.4em; }

.changelog {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.changelog-item {
  background: var(--white);
  border-radius: var(--radius);
  padding: 24px 28px;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
  border-left: 3px solid var(--crimson);
}
.changelog-item h3 {
  font-size: 1.05rem;
  margin-bottom: 0.35em;
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
}
.changelog-date {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--gray-500);
}
.changelog-item ul { margin: 0.5em 0 0; color: var(--gray-700); font-size: 0.95rem; }

.security-notice {
  background: rgba(183, 28, 28, 0.06);
  border: 1px solid rgba(183, 28, 28, 0.2);
  border-radius: var(--radius);
  padding: 28px 32px;
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 20px;
  align-items: start;
}
.security-notice svg {
  width: 40px;
  height: 40px;
  color: var(--crimson);
}
.security-notice h3 { margin-bottom: 0.4em; }
.security-notice p { margin: 0; font-size: 0.95rem; }

/* ========== ZH-CN article ========== */
.article-layout {
  max-width: 800px;
  margin: 0 auto;
}
.article-body {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
  padding: 48px 48px;
}
.article-body h2 {
  font-size: 1.45rem;
  margin-top: 2em;
  margin-bottom: 0.75em;
  padding-bottom: 0.4em;
  border-bottom: 2px solid var(--gray-100);
}
.article-body h2:first-child { margin-top: 0; }
.article-body h3 {
  font-size: 1.15rem;
  margin-top: 1.5em;
  margin-bottom: 0.5em;
}
.article-lead {
  font-size: 1.1rem;
  color: var(--gray-700);
  border-left: 3px solid var(--crimson);
  padding-left: 18px;
  margin-bottom: 1.75em;
}
.tips-box {
  background: var(--gray-50);
  border-radius: var(--radius);
  padding: 24px 28px;
  margin: 1.5em 0;
  border: 1px solid var(--gray-100);
}
.tips-box h3 { margin-top: 0; }
.cta-banner {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 100%);
  border-radius: var(--radius);
  padding: 40px 36px;
  text-align: center;
  margin-top: 48px;
  color: var(--white);
}
.cta-banner h2 { color: var(--white); margin-bottom: 0.5em; }
.cta-banner p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 1.5em;
}
.cta-banner .btn:hover { text-decoration: none; }

.toc {
  background: var(--gray-50);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 2em;
  border: 1px solid var(--gray-100);
}
.toc h3 { font-size: 1rem; margin-bottom: 0.6em; }
.toc ol { margin: 0; color: var(--gray-700); font-size: 0.95rem; }
.toc a { color: var(--navy-soft); }
.toc a:hover { color: var(--crimson); }

/* ========== Utility ========== */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* ========== Responsive ========== */
@media (max-width: 960px) {
  .hero .container { grid-template-columns: 1fr; gap: 36px; }
  .hero-visual { order: -1; }
  .hero-visual svg { max-width: 340px; margin: 0 auto; }
  .hero-content h1 { font-size: 2rem; }
  .features-grid,
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .platforms-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2) { border-right: none; }
  .stat-item:nth-child(1),
  .stat-item:nth-child(2) { border-bottom: 1px solid var(--gray-100); }
  .dl-cards { grid-template-columns: 1fr; }
  .download-featured { grid-template-columns: 1fr; }
  .download-cta { min-width: 0; }
}

@media (max-width: 720px) {
  .nav-toggle { display: flex; }
  .site-nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--navy);
    padding: 12px 20px 20px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
  }
  .site-nav.open { display: block; }
  .site-nav ul { flex-direction: column; align-items: stretch; gap: 0; }
  .site-nav a {
    padding: 12px 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }
  .site-nav a.active { border-bottom-color: var(--crimson); }

  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.45rem; }
  .hero { padding: 48px 0 56px; }
  .hero-content h1 { font-size: 1.75rem; }
  .section { padding: 52px 0; }
  .features-grid,
  .reviews-grid,
  .platforms-grid,
  .req-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .deep-item { grid-template-columns: 1fr; gap: 16px; }
  .article-body { padding: 28px 20px; }
  .download-featured { padding: 28px 20px; }
  .security-notice { grid-template-columns: 1fr; }
}