/* ============================================
   快连VPN – Warm Ember Editorial Theme
   Unique design: warm amber/teal palette,
   diagonal hero, timeline features, 
   magazine-style editorial layout
   ============================================ */

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

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --amber-50: #fffbeb;
  --amber-100: #fef3c7;
  --amber-200: #fde68a;
  --amber-400: #fbbf24;
  --amber-500: #f59e0b;
  --amber-600: #d97706;
  --amber-700: #b45309;
  --teal-400: #2dd4bf;
  --teal-500: #14b8a6;
  --teal-600: #0d9488;
  --teal-700: #0f766e;
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;
  --white: #ffffff;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -2px rgba(0,0,0,.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,.1), 0 4px 6px -4px rgba(0,0,0,.1);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,.1), 0 8px 10px -6px rgba(0,0,0,.1);
  --radius: 12px;
  --radius-lg: 20px;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.7;
  color: var(--slate-800);
  background: var(--white);
  overflow-x: hidden;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  outline: none;
}

img { max-width: 100%; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Top Navigation ---------- */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--slate-200);
  transition: box-shadow .3s;
}

.topbar.scrolled {
  box-shadow: var(--shadow-md);
}

.topbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.brand-icon svg {
  width: 36px;
  height: 36px;
}

.brand-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--slate-900);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-menu a {
  display: inline-block;
  padding: 8px 18px;
  border-radius: 8px;
  font-size: .925rem;
  font-weight: 500;
  color: var(--slate-600);
  transition: all .25s;
}

.nav-menu a:hover {
  color: var(--amber-700);
  background: var(--amber-50);
}

.nav-menu a.active {
  color: var(--white);
  background: linear-gradient(135deg, var(--amber-500), var(--amber-600));
  font-weight: 600;
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  padding: 8px;
}

.nav-toggle svg {
  width: 24px;
  height: 24px;
  stroke: var(--slate-700);
}

/* ---------- Hero – Diagonal Split ---------- */
.hero {
  position: relative;
  padding: 140px 0 100px;
  background: linear-gradient(135deg, var(--amber-50) 0%, var(--white) 50%, var(--slate-50) 100%);
  overflow: hidden;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 80px;
  background: var(--white);
  clip-path: polygon(0 60%, 100% 0, 100% 100%, 0 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-content {
  animation: fadeInUp .8s ease-out;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: 50px;
  background: linear-gradient(135deg, var(--amber-100), var(--teal-400) 200%);
  font-size: .82rem;
  font-weight: 600;
  color: var(--amber-700);
  margin-bottom: 20px;
}

.hero-badge svg {
  width: 14px;
  height: 14px;
}

.hero-title {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.2;
  color: var(--slate-900);
  margin-bottom: 18px;
}

.hero-title em {
  font-style: normal;
  background: linear-gradient(135deg, var(--amber-500), var(--teal-500));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--slate-500);
  margin-bottom: 32px;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeInUp .8s ease-out .2s both;
}

.hero-graphic {
  width: 100%;
  max-width: 440px;
  aspect-ratio: 1;
  background: linear-gradient(160deg, var(--amber-100) 0%, var(--teal-400) 50%, var(--amber-200) 100%);
  border-radius: 50%;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: float 6s ease-in-out infinite;
}

.hero-graphic::before {
  content: '';
  position: absolute;
  inset: 15px;
  border-radius: 50%;
  background: rgba(255,255,255,.6);
  backdrop-filter: blur(20px);
}

.hero-graphic svg {
  position: relative;
  z-index: 1;
  width: 140px;
  height: 140px;
}

.hero-graphic .orbit {
  position: absolute;
  border: 2px dashed var(--amber-200);
  border-radius: 50%;
  animation: spin 20s linear infinite;
}

.hero-graphic .orbit-1 { width: 300px; height: 300px; }
.hero-graphic .orbit-2 { width: 400px; height: 400px; animation-duration: 30s; animation-direction: reverse; }

.orbit-dot {
  position: absolute;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  top: -6px;
  left: 50%;
  margin-left: -6px;
}

.orbit-dot-amber { background: var(--amber-400); }
.orbit-dot-teal { background: var(--teal-400); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 10px;
  font-size: .95rem;
  font-weight: 600;
  transition: all .3s;
  border: none;
  cursor: pointer;
}

.btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.btn-primary {
  background: linear-gradient(135deg, var(--amber-500), var(--amber-600));
  color: var(--white);
  box-shadow: 0 4px 14px rgba(245,158,11,.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(245,158,11,.45);
}

.btn-secondary {
  background: var(--white);
  color: var(--slate-700);
  border: 2px solid var(--slate-200);
}

.btn-secondary:hover {
  border-color: var(--amber-400);
  color: var(--amber-700);
  transform: translateY(-2px);
}

.btn-teal {
  background: linear-gradient(135deg, var(--teal-500), var(--teal-600));
  color: var(--white);
  box-shadow: 0 4px 14px rgba(20,184,166,.35);
}

.btn-teal:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(20,184,166,.45);
}

.btn-outline {
  background: transparent;
  color: var(--amber-600);
  border: 2px solid var(--amber-400);
}

.btn-outline:hover {
  background: var(--amber-500);
  color: var(--white);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.05rem;
  border-radius: 14px;
}

.btn:disabled {
  opacity: .7;
  cursor: not-allowed;
  transform: none !important;
}

/* ---------- Section Commons ---------- */
.section {
  padding: 80px 0;
}

.section-alt {
  background: var(--slate-50);
}

.section-amber {
  background: linear-gradient(180deg, var(--amber-50) 0%, var(--white) 100%);
}

.sec-header {
  text-align: center;
  margin-bottom: 56px;
}

.sec-label {
  display: inline-block;
  font-size: .8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--amber-600);
  margin-bottom: 10px;
}

.sec-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--slate-900);
  margin-bottom: 14px;
}

.sec-subtitle {
  font-size: 1.05rem;
  color: var(--slate-500);
  max-width: 600px;
  margin: 0 auto;
}

/* ---------- Timeline Features ---------- */
.timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--amber-400), var(--teal-400));
  transform: translateX(-50%);
  border-radius: 3px;
}

.tl-item {
  position: relative;
  width: 50%;
  padding: 0 40px 50px;
}

.tl-item:nth-child(odd) {
  left: 0;
  text-align: right;
  padding-right: 50px;
  padding-left: 0;
}

.tl-item:nth-child(even) {
  left: 50%;
  text-align: left;
  padding-left: 50px;
  padding-right: 0;
}

.tl-dot {
  position: absolute;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--amber-500);
  border: 3px solid var(--white);
  box-shadow: var(--shadow-md);
  top: 4px;
}

.tl-item:nth-child(odd) .tl-dot {
  right: -9px;
}

.tl-item:nth-child(even) .tl-dot {
  left: -9px;
}

.tl-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 14px;
  margin-bottom: 14px;
}

.tl-item:nth-child(odd) .tl-icon {
  margin-left: auto;
}

.tl-icon svg {
  width: 26px;
  height: 26px;
}

.tl-icon-amber {
  background: linear-gradient(135deg, var(--amber-100), var(--amber-200));
  color: var(--amber-700);
}

.tl-icon-teal {
  background: linear-gradient(135deg, rgba(20,184,166,.15), rgba(20,184,166,.25));
  color: var(--teal-700);
}

.tl-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--slate-900);
  margin-bottom: 6px;
}

.tl-desc {
  font-size: .93rem;
  color: var(--slate-500);
  line-height: 1.6;
}

/* ---------- Stat Counters ---------- */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 48px 0;
}

.stat-item {
  text-align: center;
  padding: 28px 16px;
  border-radius: var(--radius);
  background: var(--white);
  border: 1px solid var(--slate-100);
  box-shadow: var(--shadow-sm);
  transition: transform .3s, box-shadow .3s;
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.stat-num {
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--amber-500), var(--teal-500));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 6px;
}

.stat-label {
  font-size: .88rem;
  color: var(--slate-500);
  font-weight: 500;
}

/* ---------- Platform Cards ---------- */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.plat-card {
  background: var(--white);
  border: 1px solid var(--slate-100);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all .35s;
}

.plat-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: var(--amber-200);
}

.plat-card.featured {
  border: 2px solid var(--amber-400);
  position: relative;
  background: linear-gradient(180deg, var(--amber-50) 0%, var(--white) 40%);
}

.plat-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--amber-500), var(--amber-600));
  color: var(--white);
  padding: 4px 16px;
  border-radius: 20px;
  font-size: .75rem;
  font-weight: 700;
  white-space: nowrap;
}

.plat-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: 16px;
  margin-bottom: 18px;
  background: var(--slate-50);
}

.plat-icon svg {
  width: 32px;
  height: 32px;
}

.plat-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--slate-900);
  margin-bottom: 6px;
}

.plat-info {
  font-size: .85rem;
  color: var(--slate-500);
  margin-bottom: 20px;
}

.plat-card .btn {
  width: 100%;
  justify-content: center;
}

/* ---------- Review / Testimonial Marquee ---------- */
.reviews-track {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  padding: 8px 0 20px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.reviews-track::-webkit-scrollbar {
  height: 6px;
}

.reviews-track::-webkit-scrollbar-track {
  background: var(--slate-100);
  border-radius: 3px;
}

.reviews-track::-webkit-scrollbar-thumb {
  background: var(--amber-300);
  border-radius: 3px;
}

.review-card {
  flex: 0 0 320px;
  scroll-snap-align: start;
  background: var(--white);
  border: 1px solid var(--slate-100);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}

.review-stars {
  display: flex;
  gap: 3px;
  margin-bottom: 12px;
}

.review-stars svg {
  width: 16px;
  height: 16px;
  fill: var(--amber-400);
}

.review-text {
  font-size: .93rem;
  color: var(--slate-600);
  line-height: 1.65;
  margin-bottom: 16px;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 10px;
}

.review-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--amber-200), var(--teal-400));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .85rem;
  font-weight: 700;
  color: var(--white);
}

.review-name {
  font-size: .88rem;
  font-weight: 600;
  color: var(--slate-800);
}

.review-date {
  font-size: .78rem;
  color: var(--slate-400);
}

/* ---------- FAQ Accordion ---------- */
.faq-list {
  max-width: 780px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--slate-200);
}

.faq-q {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--slate-800);
  cursor: pointer;
  background: none;
  width: 100%;
  text-align: left;
  border: none;
  transition: color .25s;
}

.faq-q:hover {
  color: var(--amber-600);
}

.faq-chevron {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  transition: transform .3s;
  stroke: var(--slate-400);
}

.faq-item.open .faq-chevron {
  transform: rotate(180deg);
  stroke: var(--amber-500);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease, padding .35s ease;
}

.faq-item.open .faq-a {
  max-height: 400px;
  padding-bottom: 20px;
}

.faq-a p {
  font-size: .93rem;
  color: var(--slate-500);
  line-height: 1.7;
}

/* ---------- CTA Banner ---------- */
.cta-banner {
  background: linear-gradient(135deg, var(--amber-500) 0%, var(--teal-500) 100%);
  border-radius: var(--radius-lg);
  padding: 56px 48px;
  text-align: center;
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -60%;
  right: -20%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(255,255,255,.08);
}

.cta-banner::after {
  content: '';
  position: absolute;
  bottom: -40%;
  left: -10%;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(255,255,255,.06);
}

.cta-banner h2 {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  font-size: 1.05rem;
  opacity: .9;
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}

.cta-banner .btn {
  position: relative;
  z-index: 1;
}

.btn-white {
  background: var(--white);
  color: var(--amber-700);
  font-weight: 700;
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,.15);
}

/* ---------- Comparison Table ---------- */
.cmp-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--slate-200);
}

.cmp-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .92rem;
}

.cmp-table th,
.cmp-table td {
  padding: 14px 20px;
  text-align: left;
  border-bottom: 1px solid var(--slate-100);
}

.cmp-table thead th {
  background: var(--slate-50);
  font-weight: 700;
  color: var(--slate-700);
  font-size: .85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.cmp-table thead th:first-child {
  border-top-left-radius: var(--radius);
}

.cmp-table thead th:last-child {
  border-top-right-radius: var(--radius);
}

.cmp-table tbody tr:hover {
  background: var(--amber-50);
}

.cmp-table .highlight {
  background: linear-gradient(180deg, var(--amber-50) 0%, rgba(254,243,199,.3) 100%);
  font-weight: 600;
}

.cmp-check {
  color: var(--teal-500);
  font-weight: 700;
}

.cmp-cross {
  color: var(--slate-300);
}

/* ---------- Version Log ---------- */
.version-list {
  max-width: 700px;
  margin: 0 auto;
}

.version-item {
  display: flex;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--slate-100);
}

.version-tag {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 32px;
  padding: 0 14px;
  border-radius: 8px;
  background: var(--amber-100);
  color: var(--amber-700);
  font-size: .82rem;
  font-weight: 700;
}

.version-body h4 {
  font-size: .95rem;
  font-weight: 700;
  color: var(--slate-800);
  margin-bottom: 4px;
}

.version-body p {
  font-size: .88rem;
  color: var(--slate-500);
}

/* ---------- Feature Zigzag ---------- */
.zigzag-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding: 48px 0;
}

.zigzag-row:nth-child(even) {
  direction: rtl;
}

.zigzag-row:nth-child(even) > * {
  direction: ltr;
}

.zigzag-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.zigzag-visual .icon-box {
  width: 200px;
  height: 200px;
  border-radius: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.zigzag-visual .icon-box svg {
  width: 80px;
  height: 80px;
}

.zigzag-visual .icon-box::after {
  content: '';
  position: absolute;
  inset: -12px;
  border-radius: 48px;
  border: 2px dashed;
  opacity: .25;
}

.icon-box-amber {
  background: linear-gradient(135deg, var(--amber-100), var(--amber-200));
  color: var(--amber-700);
}

.icon-box-amber::after {
  border-color: var(--amber-400);
}

.icon-box-teal {
  background: linear-gradient(135deg, rgba(20,184,166,.1), rgba(20,184,166,.2));
  color: var(--teal-700);
}

.icon-box-teal::after {
  border-color: var(--teal-400);
}

.zigzag-info h3 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--slate-900);
  margin-bottom: 12px;
}

.zigzag-info p {
  font-size: .98rem;
  color: var(--slate-500);
  margin-bottom: 8px;
  line-height: 1.7;
}

.zigzag-info ul {
  list-style: none;
  margin-top: 16px;
}

.zigzag-info ul li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 6px 0;
  font-size: .92rem;
  color: var(--slate-600);
}

.zigzag-info ul li svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 2px;
  stroke: var(--teal-500);
}

/* ---------- Steps / How-to ---------- */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.step-card {
  text-align: center;
  padding: 36px 24px;
  border-radius: var(--radius-lg);
  background: var(--white);
  border: 1px solid var(--slate-100);
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: transform .3s, box-shadow .3s;
}

.step-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.step-num {
  position: absolute;
  top: -16px;
  left: 50%;
  transform: translateX(-50%);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--amber-500), var(--amber-600));
  color: var(--white);
  font-size: .85rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(245,158,11,.3);
}

.step-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 16px;
  margin-bottom: 16px;
  background: var(--amber-50);
}

.step-icon svg {
  width: 28px;
  height: 28px;
  stroke: var(--amber-600);
}

.step-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--slate-900);
  margin-bottom: 8px;
}

.step-desc {
  font-size: .88rem;
  color: var(--slate-500);
  line-height: 1.6;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--slate-900);
  color: var(--slate-400);
  padding: 40px 0 24px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  text-align: center;
}

.footer-security {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: .9rem;
  color: var(--teal-400);
  margin-bottom: 16px;
  font-weight: 500;
}

.footer-security svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.footer-copy {
  font-size: .82rem;
  color: var(--slate-500);
  line-height: 1.7;
}

/* ---------- Download Page Specifics ---------- */
.dl-hero {
  padding: 140px 0 80px;
  background: linear-gradient(180deg, var(--slate-900) 0%, var(--slate-800) 100%);
  color: var(--white);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.dl-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 30% 50%, rgba(245,158,11,.12) 0%, transparent 60%),
              radial-gradient(circle at 70% 50%, rgba(20,184,166,.12) 0%, transparent 60%);
}

.dl-hero h1 {
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 14px;
  position: relative;
}

.dl-hero p {
  font-size: 1.1rem;
  color: var(--slate-300);
  max-width: 560px;
  margin: 0 auto;
  position: relative;
}

.dl-hero .dl-hero-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  border-radius: 24px;
  background: linear-gradient(135deg, var(--amber-500), var(--teal-500));
  margin-bottom: 24px;
  position: relative;
}

.dl-hero .dl-hero-icon svg {
  width: 40px;
  height: 40px;
}

/* Windows Featured Card */
.win-featured {
  max-width: 720px;
  margin: -40px auto 0;
  position: relative;
  z-index: 10;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: 40px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 30px;
  align-items: center;
}

.win-featured .win-icon {
  width: 80px;
  height: 80px;
  border-radius: 20px;
  background: linear-gradient(135deg, var(--amber-100), var(--amber-200));
  display: flex;
  align-items: center;
  justify-content: center;
}

.win-featured .win-icon svg {
  width: 40px;
  height: 40px;
  stroke: var(--amber-600);
}

.win-info h3 {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--slate-900);
  margin-bottom: 6px;
}

.win-info p {
  font-size: .92rem;
  color: var(--slate-500);
  margin-bottom: 16px;
}

.win-info .win-meta {
  display: flex;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.win-meta span {
  font-size: .82rem;
  color: var(--slate-400);
  display: flex;
  align-items: center;
  gap: 4px;
}

.win-meta span svg {
  width: 14px;
  height: 14px;
}

/* ---------- Tips Section ---------- */
.tips-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.tip-card {
  display: flex;
  gap: 16px;
  padding: 24px;
  border-radius: var(--radius);
  background: var(--white);
  border: 1px solid var(--slate-100);
  box-shadow: var(--shadow-sm);
  transition: all .3s;
}

.tip-card:hover {
  border-color: var(--amber-200);
  box-shadow: var(--shadow-md);
}

.tip-num {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--amber-100), var(--amber-200));
  color: var(--amber-700);
  font-size: .9rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tip-body h4 {
  font-size: .98rem;
  font-weight: 700;
  color: var(--slate-800);
  margin-bottom: 4px;
}

.tip-body p {
  font-size: .88rem;
  color: var(--slate-500);
  line-height: 1.6;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .hero-desc { margin: 0 auto 32px; }
  .hero-actions { justify-content: center; }

  .hero-graphic {
    max-width: 300px;
    margin: 0 auto;
  }
  .hero-graphic .orbit-1 { width: 220px; height: 220px; }
  .hero-graphic .orbit-2 { width: 280px; height: 280px; }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
  }

  .platform-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .timeline::before { left: 20px; }
  .tl-item,
  .tl-item:nth-child(odd),
  .tl-item:nth-child(even) {
    width: 100%;
    left: 0;
    text-align: left;
    padding-left: 52px;
    padding-right: 0;
  }
  .tl-item:nth-child(odd) .tl-dot,
  .tl-item:nth-child(even) .tl-dot {
    left: 11px;
    right: auto;
  }
  .tl-item:nth-child(odd) .tl-icon {
    margin-left: 0;
  }

  .zigzag-row,
  .zigzag-row:nth-child(even) {
    grid-template-columns: 1fr;
    gap: 30px;
    direction: ltr;
  }

  .steps-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto;
  }

  .win-featured {
    grid-template-columns: 1fr;
    text-align: center;
    margin: -30px 20px 0;
  }

  .win-featured .win-icon {
    margin: 0 auto;
  }

  .win-info .win-meta {
    justify-content: center;
  }

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

@media (max-width: 600px) {
  .topbar-inner { height: 56px; }

  .nav-menu {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--white);
    padding: 16px;
    gap: 4px;
    border-bottom: 1px solid var(--slate-200);
    box-shadow: var(--shadow-md);
  }

  .nav-menu.open { display: flex; }

  .nav-toggle { display: block; }

  .hero { padding: 110px 0 80px; }
  .hero-title { font-size: 2rem; }

  .platform-grid {
    grid-template-columns: 1fr;
    max-width: 360px;
    margin: 0 auto;
  }

  .stats-bar {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .stat-num { font-size: 1.5rem; }

  .cta-banner { padding: 36px 24px; }
  .cta-banner h2 { font-size: 1.4rem; }

  .sec-title { font-size: 1.6rem; }
  .dl-hero h1 { font-size: 1.8rem; }
}