/*
  Google4 Chrome Landing Theme: Aurora Harbor
  Distinct midnight gradient with coral and aqua highlights
*/
:root {
  --bg-top: #0e1222;
  --bg-bottom: #121d32;
  --surface: rgba(18, 29, 50, 0.8);
  --surface-strong: rgba(18, 29, 50, 0.9);
  --card: rgba(21, 35, 58, 0.92);
  --card-light: rgba(32, 49, 80, 0.85);
  --border: rgba(99, 130, 186, 0.3);
  --accent: #ff7aa8;
  --accent-soft: rgba(255, 122, 168, 0.15);
  --accent-alt: #45d0c7;
  --accent-alt-soft: rgba(69, 208, 199, 0.15);
  --text: #f3f6ff;
  --text-soft: #b8c4dc;
  --text-muted: #8fa2c4;
  --shadow: 0 18px 40px rgba(8, 13, 29, 0.35);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --max-width: 1180px;
  --font-heading: "Manrope", "Segoe UI", sans-serif;
  --font-body: "Inter", "Microsoft YaHei", "PingFang SC", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  color: var(--text);
  font-family: var(--font-body);
  background: linear-gradient(160deg, var(--bg-top), var(--bg-bottom));
  min-height: 100%;
}

main {
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

.wrapper {
  width: min(96%, var(--max-width));
  margin: 0 auto;
}

.nav-bar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(5, 9, 19, 0.85);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(126, 150, 197, 0.15);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
}

.brand {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand-badge {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: linear-gradient(140deg, var(--accent), var(--accent-alt));
  display: grid;
  place-items: center;
  box-shadow: 0 12px 24px rgba(255, 122, 168, 0.35);
}

.brand-badge svg {
  width: 18px;
  height: 18px;
}

.nav-links {
  display: flex;
  gap: 12px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 0.93rem;
  color: var(--text-soft);
  transition: all 0.25s ease;
}

.nav-link:hover {
  color: var(--text);
  background: rgba(73, 108, 176, 0.25);
}

.nav-link.active {
  background: linear-gradient(120deg, var(--accent), var(--accent-alt));
  color: #080c17;
  font-weight: 600;
  box-shadow: 0 12px 30px rgba(18, 173, 158, 0.35);
}

.hero {
  position: relative;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero::before,
.hero::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  filter: blur(130px);
  opacity: 0.45;
}

.hero::before {
  width: 420px;
  height: 420px;
  background: var(--accent-alt);
  top: -160px;
  right: -160px;
}

.hero::after {
  width: 380px;
  height: 380px;
  background: var(--accent);
  bottom: -140px;
  left: -120px;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 40px;
  align-items: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border-radius: 999px;
  background: rgba(26, 41, 70, 0.75);
  border: 1px solid rgba(143, 186, 255, 0.3);
  color: var(--text-soft);
  margin-bottom: 24px;
  font-size: 0.9rem;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.6rem, 4vw, 3.6rem);
  margin: 0 0 20px;
  line-height: 1.1;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 32px;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}

.btn {
  border: none;
  cursor: pointer;
  border-radius: 999px;
  padding: 14px 26px;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.btn svg {
  width: 18px;
  height: 18px;
}

.btn-primary {
  color: #08101e;
  background: linear-gradient(135deg, var(--accent), var(--accent-alt));
  box-shadow: 0 16px 34px rgba(55, 194, 186, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 36px rgba(255, 122, 168, 0.45);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid rgba(162, 194, 248, 0.5);
}

.btn-outline:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.75);
}

.hero-visual {
  position: relative;
  padding: 26px;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid rgba(92, 130, 194, 0.35);
  box-shadow: var(--shadow);
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.hero-card {
  background: var(--card);
  border: 1px solid rgba(93, 139, 211, 0.22);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: relative;
  overflow: hidden;
}

.hero-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(255, 122, 168, 0.08), rgba(69, 208, 199, 0.08));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.hero-card:hover::after {
  opacity: 1;
}

.hero-card strong {
  font-family: var(--font-heading);
  font-size: 1.1rem;
}

.hero-pulse {
  position: absolute;
  inset: -40px;
  background: radial-gradient(circle at 30% 20%, rgba(255, 122, 168, 0.14), transparent 60%),
    radial-gradient(circle at 70% 80%, rgba(69, 208, 199, 0.12), transparent 55%);
  mix-blend-mode: screen;
  opacity: 0.7;
}

.section {
  padding: 80px 0;
  position: relative;
}

.section-head {
  margin-bottom: 40px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: flex-start;
}

.section-label {
  font-size: 0.85rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 3vw, 2.6rem);
  margin: 0;
}

.section-desc {
  max-width: 640px;
  color: var(--text-muted);
  line-height: 1.7;
}

.feature-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.feature-card {
  background: var(--card-light);
  border: 1px solid rgba(97, 149, 222, 0.22);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: 0 16px 32px rgba(8, 12, 24, 0.24);
}

.feature-icon {
  width: 46px;
  height: 46px;
  border-radius: 16px;
  background: var(--accent-soft);
  color: var(--accent);
  display: grid;
  place-items: center;
}

.feature-icon.alt {
  background: var(--accent-alt-soft);
  color: var(--accent-alt);
}

.feature-card h3 {
  margin: 0;
  font-size: 1.25rem;
  font-family: var(--font-heading);
}

.feature-card p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.65;
}

.platform-section {
  background: rgba(12, 18, 32, 0.85);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(115, 162, 238, 0.2);
  box-shadow: var(--shadow);
  padding: 48px;
}

.platform-cards {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

.platform-card {
  background: rgba(20, 33, 54, 0.9);
  border-radius: var(--radius-md);
  border: 1px solid rgba(104, 144, 214, 0.22);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.platform-meta {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.platform-card h4 {
  margin: 0;
  font-size: 1.15rem;
}

.platform-card span {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.platform-card button {
  width: fit-content;
}

.deep-grid {
  display: grid;
  gap: 36px;
}

.deep-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 36px;
  align-items: center;
  background: rgba(14, 24, 42, 0.8);
  border-radius: var(--radius-md);
  padding: 36px;
  border: 1px solid rgba(102, 140, 206, 0.24);
}

.deep-row:nth-child(even) {
  direction: rtl;
  text-align: right;
}

.deep-row:nth-child(even) .deep-text {
  direction: ltr;
  text-align: left;
}

.deep-media {
  position: relative;
  background: rgba(21, 36, 58, 0.85);
  border-radius: var(--radius-md);
  padding: 26px;
  border: 1px dashed rgba(128, 166, 232, 0.35);
  min-height: 180px;
}

.deep-text h3 {
  margin: 0 0 18px;
  font-family: var(--font-heading);
  font-size: 1.4rem;
}

.deep-text p {
  margin: 0 0 12px;
  line-height: 1.7;
  color: var(--text-muted);
}

.deep-text ul {
  margin: 0;
  padding-left: 18px;
  color: var(--text-muted);
  line-height: 1.6;
}

.reviews {
  background: rgba(10, 16, 30, 0.85);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(99, 134, 200, 0.22);
  padding: 48px;
}

.review-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.review-card {
  background: rgba(19, 32, 54, 0.9);
  border-radius: var(--radius-md);
  border: 1px solid rgba(104, 144, 214, 0.2);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.review-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
}

.stars {
  display: inline-flex;
  gap: 4px;
  color: var(--accent);
}

.review-text {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.7;
}

.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
  margin-top: 32px;
}

.stat-card {
  background: rgba(24, 38, 64, 0.85);
  border-radius: var(--radius-md);
  border: 1px solid rgba(102, 150, 221, 0.22);
  padding: 24px;
  text-align: center;
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 2rem;
  margin-bottom: 8px;
  color: var(--accent-alt);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid rgba(105, 150, 224, 0.24);
}

.compare-table th,
.compare-table td {
  padding: 18px;
  border-bottom: 1px solid rgba(88, 124, 190, 0.2);
  background: rgba(18, 32, 58, 0.85);
  text-align: left;
  color: var(--text-muted);
}

.compare-table th {
  background: rgba(32, 52, 84, 0.95);
  color: var(--text);
  font-weight: 600;
}

.compare-table tr:nth-child(even) td {
  background: rgba(23, 38, 64, 0.85);
}

.faq-list {
  display: grid;
  gap: 18px;
}

.faq-item {
  background: rgba(18, 30, 52, 0.88);
  border: 1px solid rgba(105, 142, 212, 0.25);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.faq-item h4 {
  margin: 0;
  font-size: 1.15rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  user-select: none;
}

.faq-item h4::after {
  content: "+";
  flex: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1.5px solid rgba(143, 186, 255, 0.6);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  line-height: 1;
  color: rgba(204, 224, 255, 0.85);
  position: relative;
}

.faq-item.open h4::after {
  content: "−";
}

.faq-item h4:focus-visible {
  outline: 2px solid rgba(143, 186, 255, 0.6);
  outline-offset: 4px;
}

.faq-item:not(.open) > :not(h4) {
  display: none;
}

.faq-item > :not(h4) {
  margin-top: 12px;
}

.faq-item p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.7;
}

.faq-item.open {
  border-color: rgba(143, 186, 255, 0.45);
  box-shadow: 0 18px 36px rgba(15, 26, 48, 0.28);
}

.download-hero {
  background: rgba(12, 22, 38, 0.9);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(108, 154, 223, 0.22);
  padding: 48px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 40px;
  box-shadow: var(--shadow);
}

.dl-meta {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.badge {
  border-radius: 999px;
  padding: 8px 14px;
  background: rgba(69, 208, 199, 0.12);
  color: var(--accent-alt);
  font-size: 0.86rem;
  border: 1px solid rgba(69, 208, 199, 0.4);
}

.badge.alt {
  background: rgba(255, 122, 168, 0.14);
  color: var(--accent);
  border-color: rgba(255, 122, 168, 0.4);
}

.meta-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.meta-card {
  background: rgba(19, 32, 56, 0.9);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  border: 1px solid rgba(99, 141, 212, 0.2);
}

.platform-downloads {
  margin-top: 56px;
}

.dl-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.dl-card {
  background: rgba(19, 30, 52, 0.9);
  border-radius: var(--radius-md);
  border: 1px solid rgba(111, 148, 214, 0.24);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.step-list {
  display: grid;
  gap: 16px;
}

.step-item {
  background: rgba(24, 36, 60, 0.88);
  border-radius: var(--radius-md);
  border: 1px solid rgba(102, 140, 208, 0.24);
  padding: 20px;
  display: grid;
  gap: 10px;
}

.step-head {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
}

.step-number {
  width: 30px;
  height: 30px;
  border-radius: 10px;
  background: rgba(255, 122, 168, 0.2);
  color: var(--accent);
  display: grid;
  place-items: center;
  font-size: 0.9rem;
}

.requirements {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.req-card {
  background: rgba(19, 30, 52, 0.9);
  border-radius: var(--radius-md);
  border: 1px solid rgba(108, 150, 221, 0.22);
  padding: 22px;
  display: grid;
  gap: 12px;
}

.log-list {
  display: grid;
  gap: 18px;
}

.log-item {
  background: rgba(21, 34, 58, 0.88);
  border-radius: var(--radius-md);
  border: 1px solid rgba(115, 154, 224, 0.22);
  padding: 20px;
  display: grid;
  gap: 8px;
}

.cta-banner {
  background: linear-gradient(120deg, rgba(255, 122, 168, 0.18), rgba(69, 208, 199, 0.18));
  border-radius: var(--radius-lg);
  border: 1px solid rgba(92, 156, 204, 0.22);
  padding: 38px;
  text-align: center;
  margin-top: 60px;
}


.article-layout {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 32px;
}

.article {
  background: rgba(12, 18, 32, 0.88);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(112, 154, 226, 0.24);
  padding: 48px;
  display: grid;
  gap: 28px;
}

.article-section h2 {
  margin: 0 0 16px;
  font-size: 1.6rem;
}

.article-section p,
.article-section ul {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.8;
}

.article-section ul {
  padding-left: 20px;
}

.article-meta {
  display: grid;
  gap: 16px;
}

.article-meta .tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.tag {
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(88, 144, 214, 0.2);
  color: var(--text);
  font-size: 0.9rem;
}

.article-aside {
  background: rgba(18, 29, 48, 0.88);
  border-radius: var(--radius-md);
  border: 1px solid rgba(105, 152, 220, 0.22);
  padding: 28px;
  display: grid;
  gap: 18px;
  height: fit-content;
  position: sticky;
  top: 120px;
}

.aside-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 14px 22px;
  background: linear-gradient(132deg, var(--accent), var(--accent-alt));
  color: #080c16;
  font-weight: 600;
}

.site-footer {
  margin-top: 80px;
  padding: 40px 0 60px;
  border-top: 1px solid rgba(103, 142, 210, 0.22);
  background: rgba(8, 12, 24, 0.75);
}

.footer-inner {
  width: min(96%, var(--max-width));
  margin: 0 auto;
  text-align: center;
  display: grid;
  gap: 12px;
  color: var(--text-muted);
  line-height: 1.6;
}

.security-line {
  color: var(--accent-alt);
  font-weight: 600;
}

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

@media (max-width: 1080px) {
  .hero-inner,
  .download-hero {
    grid-template-columns: 1fr;
  }

  .feature-grid,
  .platform-cards,
  .review-grid,
  .stats-bar,
  .dl-grid,
  .requirements {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .deep-row {
    grid-template-columns: 1fr;
    direction: ltr !important;
    text-align: left !important;
  }

  .deep-media {
    min-height: 140px;
  }
}

@media (max-width: 720px) {
  .nav-inner {
    flex-direction: column;
    gap: 18px;
  }

  .nav-links {
    width: 100%;
    justify-content: center;
  }

  .hero {
    padding: 100px 0 60px;
  }

  .hero-inner {
    gap: 32px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
  }

  .feature-grid,
  .platform-cards,
  .review-grid,
  .stats-bar,
  .dl-grid,
  .requirements {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 60px 0;
  }

  .platform-section,
  .reviews,
  .download-hero,
  .article {
    padding: 32px;
  }

  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-aside {
    position: static;
  }
}