/* Copper Circuit Theme - WPS Office Landing Site */
/* Primary: Copper #b87333 | Navy #1a2744 | Cream #faf8f5 */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --copper: #b87333;
  --copper-light: #d4a574;
  --copper-dark: #8b5a2b;
  --navy: #1a2744;
  --navy-light: #2d3f5f;
  --cream: #faf8f5;
  --cream-dark: #f0ebe3;
  --warm-gray: #6b5b4f;
  --text-dark: #2c2420;
  --text-light: #5a4d42;
  --white: #ffffff;
  --success: #4a7c59;
  --warning: #c9a227;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 20px rgba(26, 39, 68, 0.08);
  --shadow-lg: 0 12px 40px rgba(26, 39, 68, 0.15);
  --transition: all 0.3s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--cream);
  color: var(--text-dark);
  line-height: 1.7;
}

/* Animation Keyframes */
@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% { opacity: 1; }
  50% { opacity: 0.7; }
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Navigation */
.topnav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(250, 248, 245, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--cream-dark);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--copper), var(--copper-dark));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-icon svg {
  width: 24px;
  height: 24px;
  fill: var(--white);
}

.brand-text {
  font-size: 22px;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: -0.5px;
}

.navlist {
  display: flex;
  gap: 8px;
  list-style: none;
}

.navlist a {
  padding: 10px 20px;
  border-radius: 30px;
  color: var(--text-light);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
}

.navlist a:hover {
  color: var(--copper);
  background: rgba(184, 115, 51, 0.08);
}

.navlist a.active {
  background: var(--copper);
  color: var(--white);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: none;
  background: transparent;
  cursor: pointer;
  border-radius: var(--radius-sm);
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  text-decoration: none;
}

.btn-copper {
  background: linear-gradient(135deg, var(--copper), var(--copper-dark));
  color: var(--white);
  box-shadow: 0 4px 15px rgba(184, 115, 51, 0.3);
}

.btn-copper:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(184, 115, 51, 0.4);
}

.btn-navy {
  background: var(--navy);
  color: var(--white);
}

.btn-navy:hover {
  background: var(--navy-light);
  transform: translateY(-2px);
}

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

.btn-outline:hover {
  background: var(--copper);
  color: var(--white);
}

.btn-white {
  background: var(--white);
  color: var(--copper);
}

.btn-white:hover {
  background: var(--cream);
}

.btn-lg {
  padding: 16px 32px;
  font-size: 16px;
}

.btn-sm {
  padding: 10px 20px;
  font-size: 14px;
}

/* Hero Section */
.hero {
  background: linear-gradient(165deg, var(--navy) 0%, var(--navy-light) 50%, #1e3a5f 100%);
  color: var(--white);
  padding: 80px 0 120px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(184, 115, 51, 0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(184, 115, 51, 0.2);
  border: 1px solid rgba(184, 115, 51, 0.4);
  padding: 8px 16px;
  border-radius: 30px;
  font-size: 13px;
  margin-bottom: 24px;
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background: var(--copper-light);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.hero-title {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -1px;
}

.hero-title .accent {
  color: var(--copper-light);
}

.hero-desc {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 32px;
  max-width: 480px;
}

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

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-stat {
  text-align: left;
}

.hero-stat-val {
  font-size: 32px;
  font-weight: 700;
  color: var(--copper-light);
}

.hero-stat-lbl {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 4px;
}

/* Hero Visual - Document Stack */
.hero-visual {
  position: relative;
  height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.doc-stack {
  position: relative;
  width: 320px;
  height: 240px;
}

.doc-card {
  position: absolute;
  width: 280px;
  height: 180px;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 20px;
  transition: var(--transition);
}

.doc-card:nth-child(1) {
  top: 0;
  left: 0;
  transform: rotate(-8deg);
  z-index: 3;
}

.doc-card:nth-child(2) {
  top: 20px;
  left: 30px;
  transform: rotate(5deg);
  z-index: 2;
  background: linear-gradient(135deg, #fff 0%, #f8f4f0 100%);
}

.doc-card:nth-child(3) {
  top: 40px;
  left: 60px;
  transform: rotate(12deg);
  z-index: 1;
  background: linear-gradient(135deg, #fff 0%, #f5f0ea 100%);
}

.doc-bar {
  height: 8px;
  background: var(--cream-dark);
  border-radius: 4px;
  margin-bottom: 12px;
  width: 60%;
}

.doc-bar:nth-child(2) { width: 80%; }
.doc-bar:nth-child(3) { width: 40%; background: var(--copper-light); }
.doc-bar:nth-child(4) { width: 70%; }
.doc-bar:nth-child(5) { width: 50%; }

.doc-icon {
  position: absolute;
  bottom: 20px;
  right: 20px;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--copper), var(--copper-dark));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.doc-icon svg {
  width: 28px;
  height: 28px;
  fill: var(--white);
}

/* Sections */
.sec {
  padding: 100px 0;
}

.sec-cream { background: var(--cream); }
.sec-white { background: var(--white); }
.sec-navy { 
  background: var(--navy); 
  color: var(--white);
}

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

.sec-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 60px;
}

.sec-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--copper);
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
}

.sec-label::before {
  content: '';
  width: 24px;
  height: 2px;
  background: var(--copper);
}

.sec-title {
  font-size: 40px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 16px;
  line-height: 1.2;
}

.sec-navy .sec-title {
  color: var(--white);
}

.sec-sub {
  font-size: 18px;
  color: var(--text-light);
}

.sec-navy .sec-sub {
  color: rgba(255, 255, 255, 0.7);
}

/* Feature Grid */
.feat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feat-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--cream-dark);
  position: relative;
  overflow: hidden;
}

.feat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--copper), var(--copper-light));
  transform: scaleX(0);
  transition: var(--transition);
}

.feat-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.feat-card:hover::before {
  transform: scaleX(1);
}

.feat-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, rgba(184, 115, 51, 0.1), rgba(184, 115, 51, 0.05));
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feat-icon svg {
  width: 28px;
  height: 28px;
  stroke: var(--copper);
  stroke-width: 2;
  fill: none;
}

.feat-name {
  font-size: 20px;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 12px;
}

.feat-desc {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.7;
}

/* Platform Section */
.plat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.plat-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--cream-dark);
}

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

.plat-card.featured {
  background: linear-gradient(135deg, var(--copper), var(--copper-dark));
  color: var(--white);
  border: none;
}

.plat-card.featured .plat-name,
.plat-card.featured .plat-ver {
  color: var(--white);
}

.plat-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  background: rgba(184, 115, 51, 0.1);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
}

.plat-card.featured .plat-icon {
  background: rgba(255, 255, 255, 0.2);
}

.plat-icon svg {
  width: 32px;
  height: 32px;
  fill: var(--copper);
}

.plat-card.featured .plat-icon svg {
  fill: var(--white);
}

.plat-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 4px;
}

.plat-ver {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 16px;
}

.plat-btn {
  width: 100%;
}

/* Showcase Section (Alternating rows) */
.show-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 80px;
}

.show-row:last-child {
  margin-bottom: 0;
}

.show-row.rev {
  direction: rtl;
}

.show-row.rev > * {
  direction: ltr;
}

.show-info {
  max-width: 480px;
}

.show-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(184, 115, 51, 0.1);
  color: var(--copper);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}

.show-badge svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  stroke-width: 2;
}

.show-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 16px;
  line-height: 1.3;
}

.show-desc {
  font-size: 16px;
  color: var(--text-light);
  margin-bottom: 20px;
}

.show-list {
  list-style: none;
}

.show-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  font-size: 15px;
  color: var(--text-light);
}

.show-list li svg {
  width: 20px;
  height: 20px;
  stroke: var(--copper);
  stroke-width: 2;
  flex-shrink: 0;
}

.show-visual {
  background: var(--white);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--cream-dark);
}

.viz-bar {
  margin-bottom: 16px;
}

.viz-bar:last-child {
  margin-bottom: 0;
}

.viz-label {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: 8px;
}

.viz-track {
  height: 12px;
  background: var(--cream-dark);
  border-radius: 6px;
  overflow: hidden;
}

.viz-fill {
  height: 100%;
  border-radius: 6px;
  background: linear-gradient(90deg, var(--copper), var(--copper-light));
  transition: width 1s ease;
}

.viz-fill.w90 { width: 90%; }
.viz-fill.w75 { width: 75%; }
.viz-fill.w60 { width: 60%; }
.viz-fill.w85 { width: 85%; }

/* Stats Band */
.stats-band {
  background: linear-gradient(135deg, var(--copper), var(--copper-dark));
  padding: 60px 0;
}

.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
}

.stat-item {
  text-align: center;
  color: var(--white);
}

.stat-num {
  font-size: 48px;
  font-weight: 800;
  margin-bottom: 8px;
}

.stat-lbl {
  font-size: 15px;
  opacity: 0.9;
}

/* Reviews */
.rev-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.rev-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
  border: 1px solid var(--cream-dark);
}

.rev-stars {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
}

.rev-stars svg {
  width: 20px;
  height: 20px;
  fill: var(--warning);
}

.rev-text {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 20px;
}

.rev-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.rev-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--copper), var(--copper-light));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-weight: 600;
  font-size: 16px;
}

.rev-name {
  font-weight: 600;
  color: var(--navy);
  font-size: 15px;
}

.rev-role {
  font-size: 13px;
  color: var(--text-light);
}

/* Comparison Table */
.cmp-wrap {
  overflow-x: auto;
}

.cmp-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.cmp-table th,
.cmp-table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--cream-dark);
}

.cmp-table th {
  background: var(--navy);
  color: var(--white);
  font-weight: 600;
  font-size: 14px;
}

.cmp-table tr:hover {
  background: rgba(184, 115, 51, 0.03);
}

.cmp-table tr:last-child td {
  border-bottom: none;
}

.cmp-hl {
  background: rgba(184, 115, 51, 0.08) !important;
  font-weight: 600;
}

.yes, .no, .part {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
}

.yes {
  color: var(--success);
  font-weight: 500;
}

.no {
  color: #999;
}

.part {
  color: var(--copper);
}

.yes svg, .no svg, .part svg {
  width: 18px;
  height: 18px;
}

/* FAQ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--white);
  border-radius: var(--radius);
  margin-bottom: 12px;
  box-shadow: var(--shadow);
  border: 1px solid var(--cream-dark);
  overflow: hidden;
}

.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  font-weight: 600;
  color: var(--navy);
  font-size: 16px;
  transition: var(--transition);
}

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

.faq-chevron {
  width: 24px;
  height: 24px;
  stroke: var(--copper);
  stroke-width: 2;
  transition: transform 0.3s ease;
}

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

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-item.open .faq-a {
  max-height: 500px;
}

.faq-a-inner {
  padding: 0 24px 24px;
  color: var(--text-light);
  font-size: 15px;
  line-height: 1.8;
}

/* CTA Banner */
.cta-banner {
  background: linear-gradient(135deg, var(--navy), var(--navy-light));
  border-radius: var(--radius);
  padding: 60px;
  text-align: center;
  color: var(--white);
}

.cta-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--copper-light);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 16px;
}

.cta-title {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 16px;
}

.cta-desc {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 32px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* Download Page Specific */
.dl-hero {
  background: linear-gradient(165deg, var(--navy) 0%, var(--navy-light) 100%);
  color: var(--white);
  padding: 100px 0 140px;
  text-align: center;
}

.dl-hero-inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
}

.dl-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(184, 115, 51, 0.2);
  border: 1px solid rgba(184, 115, 51, 0.4);
  padding: 10px 20px;
  border-radius: 30px;
  font-size: 14px;
  margin-bottom: 24px;
}

.dl-title {
  font-size: 48px;
  font-weight: 800;
  margin-bottom: 20px;
  line-height: 1.2;
}

.dl-sub {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 40px;
}

/* Windows Main Card */
.dl-main {
  margin-top: -60px;
  position: relative;
  z-index: 10;
}

.dl-win-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  max-width: 600px;
  margin: 0 auto;
}

.dl-win-top {
  background: linear-gradient(135deg, var(--copper), var(--copper-dark));
  padding: 32px;
  color: var(--white);
  display: flex;
  align-items: center;
  gap: 20px;
}

.dl-win-icon {
  width: 72px;
  height: 72px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
}

.dl-win-icon svg {
  width: 40px;
  height: 40px;
  fill: var(--white);
}

.dl-win-info {
  flex: 1;
}

.dl-win-name {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 4px;
}

.dl-win-meta {
  font-size: 14px;
  opacity: 0.9;
}

.dl-win-body {
  padding: 32px;
}

.dl-specs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}

.dl-spec {
  text-align: center;
  padding: 16px;
  background: var(--cream);
  border-radius: var(--radius-sm);
}

.dl-spec-label {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 4px;
}

.dl-spec-val {
  font-size: 16px;
  font-weight: 600;
  color: var(--navy);
}

.dl-sec-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px;
  background: rgba(74, 124, 89, 0.1);
  color: var(--success);
  border-radius: var(--radius-sm);
  font-size: 14px;
  margin-bottom: 24px;
}

.dl-sec-badge svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  stroke-width: 2;
}

.dl-win-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
}

/* Other Platforms Grid */
.op-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.op-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  border: 1px solid var(--cream-dark);
  text-align: center;
}

.op-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  background: var(--cream);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
}

.op-icon svg {
  width: 28px;
  height: 28px;
  fill: var(--copper);
}

.op-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 4px;
}

.op-ver {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 20px;
}

.op-steps {
  text-align: left;
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 20px;
}

.op-steps li {
  margin-bottom: 6px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.op-steps li::before {
  content: '•';
  color: var(--copper);
  font-weight: bold;
}

/* Guide Grid */
.guide-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.guide-col {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
}

.guide-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 24px;
}

.guide-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--copper);
}

.guide-dot.blue {
  background: var(--navy);
}

.guide-steps {
  counter-reset: step;
}

.gstep {
  display: flex;
  gap: 16px;
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--cream-dark);
}

.gstep:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.gstep-num {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--copper), var(--copper-dark));
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
}

.gstep-num.blue {
  background: var(--navy);
}

.gstep-body {
  flex: 1;
}

.gstep-title {
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 4px;
}

.gstep-desc {
  font-size: 14px;
  color: var(--text-light);
}

/* Requirements Grid */
.req-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.req-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid var(--cream-dark);
}

.req-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 12px;
  background: var(--cream);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.req-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--copper);
  stroke-width: 2;
}

.req-title {
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: 4px;
}

.req-val {
  font-size: 16px;
  font-weight: 600;
  color: var(--navy);
}

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

.ver-item {
  display: flex;
  gap: 20px;
  padding-bottom: 32px;
  position: relative;
}

.ver-item::before {
  content: '';
  position: absolute;
  left: 20px;
  top: 40px;
  bottom: 0;
  width: 2px;
  background: var(--cream-dark);
}

.ver-item:last-child {
  padding-bottom: 0;
}

.ver-item:last-child::before {
  display: none;
}

.ver-dot {
  width: 40px;
  height: 40px;
  background: var(--copper);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}

.ver-dot svg {
  width: 20px;
  height: 20px;
  fill: var(--white);
}

.ver-body {
  flex: 1;
  background: var(--white);
  border-radius: var(--radius);
  padding: 20px 24px;
  box-shadow: var(--shadow);
}

.ver-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.ver-num {
  font-size: 18px;
  font-weight: 700;
  color: var(--navy);
}

.ver-tag {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 12px;
  font-weight: 600;
}

.ver-tag.stable {
  background: rgba(74, 124, 89, 0.1);
  color: var(--success);
}

.ver-tag.lts {
  background: rgba(184, 115, 51, 0.1);
  color: var(--copper);
}

.ver-tag.beta {
  background: rgba(26, 39, 68, 0.1);
  color: var(--navy);
}

.ver-date {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 8px;
}

.ver-desc {
  font-size: 14px;
  color: var(--text-light);
}

/* Security Banner */
.sec-banner {
  background: linear-gradient(135deg, rgba(74, 124, 89, 0.1), rgba(74, 124, 89, 0.05));
  border: 1px solid rgba(74, 124, 89, 0.2);
  border-radius: var(--radius);
  padding: 24px 32px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.sec-banner-icon {
  width: 56px;
  height: 56px;
  background: var(--success);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sec-banner-icon svg {
  width: 28px;
  height: 28px;
  fill: var(--white);
}

.sec-banner-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 4px;
}

.sec-banner-desc {
  font-size: 14px;
  color: var(--text-light);
}

/* Article Page */
.art-hero {
  background: linear-gradient(165deg, var(--navy) 0%, var(--navy-light) 100%);
  color: var(--white);
  padding: 80px 0 100px;
}

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

.art-crumb {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  margin-bottom: 20px;
}

.art-crumb a {
  color: var(--copper-light);
  text-decoration: none;
}

.art-crumb a:hover {
  text-decoration: underline;
}

.art-title {
  font-size: 42px;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.2;
}

.art-sub {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.8);
  max-width: 600px;
  margin: 0 auto;
}

/* Keywords Strip */
.kw-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 32px;
}

.kw {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 20px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.9);
}

/* Article Layout */
.art-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 40px;
  margin-top: -40px;
  position: relative;
  z-index: 10;
}

.art-body {
  background: var(--white);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow);
  height: fit-content;
}

.art-body h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--navy);
  margin: 40px 0 20px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--cream-dark);
}

.art-body h2:first-child {
  margin-top: 0;
}

.art-body h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--navy);
  margin: 28px 0 14px;
}

.art-body p {
  font-size: 16px;
  color: var(--text-light);
  margin-bottom: 16px;
  line-height: 1.8;
}

.art-body ul, .art-body ol {
  margin: 16px 0;
  padding-left: 24px;
}

.art-body li {
  margin-bottom: 10px;
  color: var(--text-light);
  line-height: 1.7;
}

.art-body strong {
  color: var(--navy);
  font-weight: 600;
}

/* Inline CTA */
.inline-cta {
  background: linear-gradient(135deg, rgba(184, 115, 51, 0.1), rgba(184, 115, 51, 0.05));
  border-left: 4px solid var(--copper);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 24px;
  margin: 28px 0;
}

.inline-cta-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
}

.inline-cta-desc {
  font-size: 15px;
  color: var(--text-light);
  margin-bottom: 16px;
}

/* Sidebar */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sbox {
  background: var(--white);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--cream-dark);
}

.sbox-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.sbox-title svg {
  width: 20px;
  height: 20px;
  stroke: var(--copper);
  stroke-width: 2;
}

.sdl-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px;
  border-radius: var(--radius-sm);
  background: var(--cream);
  margin-bottom: 10px;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  width: 100%;
  text-align: left;
}

.sdl-btn:hover {
  background: rgba(184, 115, 51, 0.1);
}

.sdl-btn.primary {
  background: linear-gradient(135deg, var(--copper), var(--copper-dark));
  color: var(--white);
}

.sdl-btn.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(184, 115, 51, 0.3);
}

.sdl-btn-ico {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sdl-btn-ico svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

.sdl-btn-info {
  flex: 1;
}

.sdl-btn-name {
  font-weight: 600;
  font-size: 14px;
  display: block;
}

.sdl-btn-ver {
  font-size: 12px;
  opacity: 0.8;
}

/* TOC */
.stoc {
  list-style: none;
}

.stoc li {
  padding: 8px 0;
  border-bottom: 1px solid var(--cream-dark);
}

.stoc li:last-child {
  border-bottom: none;
}

.stoc a {
  color: var(--text-light);
  text-decoration: none;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}

.stoc a::before {
  content: '›';
  color: var(--copper);
  font-weight: bold;
}

.stoc a:hover {
  color: var(--copper);
  padding-left: 4px;
}

/* Stats Box */
.sstat {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.sstat-item {
  text-align: center;
  padding: 12px;
  background: var(--cream);
  border-radius: var(--radius-sm);
}

.sstat-num {
  font-size: 24px;
  font-weight: 700;
  color: var(--copper);
}

.sstat-lbl {
  font-size: 12px;
  color: var(--text-light);
}

.side-security {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: rgba(74, 124, 89, 0.1);
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--success);
}

.side-security svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
  stroke-width: 2;
  flex-shrink: 0;
}

/* Tips Grid */
.tips-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 20px 0;
}

.tip-card {
  background: var(--cream);
  border-radius: var(--radius-sm);
  padding: 20px;
  border-left: 3px solid var(--copper);
}

.tip-num {
  font-size: 12px;
  font-weight: 700;
  color: var(--copper);
  margin-bottom: 8px;
}

.tip-title {
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 6px;
  font-size: 15px;
}

.tip-desc {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.6;
}

/* Footer */
.site-footer {
  background: var(--navy);
  color: var(--white);
  padding: 60px 0 40px;
}

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

.footer-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 24px;
}

.footer-brand .brand-icon {
  background: var(--copper);
}

.footer-brand .brand-text {
  color: var(--white);
}

.footer-security {
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  padding: 20px 32px;
  margin-bottom: 24px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
}

.footer-security svg {
  width: 24px;
  height: 24px;
  stroke: var(--copper-light);
  stroke-width: 2;
}

.footer-note {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.8;
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .hero-stats {
    justify-content: center;
  }
  
  .hero-visual {
    order: -1;
    height: 300px;
  }
  
  .doc-stack {
    transform: scale(0.85);
  }
  
  .feat-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .plat-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .show-row {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .show-row.rev {
    direction: ltr;
  }
  
  .show-info {
    max-width: 100%;
  }
  
  .stats-row {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .art-layout {
    grid-template-columns: 1fr;
  }
  
  .sidebar {
    order: -1;
  }
}

@media (max-width: 768px) {
  .navlist {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--cream);
    flex-direction: column;
    padding: 16px 24px;
    gap: 8px;
    border-bottom: 1px solid var(--cream-dark);
  }
  
  .navlist.show {
    display: flex;
  }
  
  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .hero {
    padding: 60px 0 80px;
  }
  
  .hero-title {
    font-size: 36px;
  }
  
  .hero-stats {
    flex-wrap: wrap;
    gap: 20px;
  }
  
  .sec {
    padding: 60px 0;
  }
  
  .sec-title {
    font-size: 28px;
  }
  
  .feat-grid {
    grid-template-columns: 1fr;
  }
  
  .plat-grid {
    grid-template-columns: 1fr;
  }
  
  .rev-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-row {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
  
  .stat-num {
    font-size: 36px;
  }
  
  .op-grid {
    grid-template-columns: 1fr;
  }
  
  .guide-grid {
    grid-template-columns: 1fr;
  }
  
  .req-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .dl-specs {
    grid-template-columns: 1fr;
  }
  
  .dl-win-btns {
    flex-direction: column;
  }
  
  .tips-grid {
    grid-template-columns: 1fr;
  }
  
  .cta-banner {
    padding: 40px 24px;
  }
  
  .cta-title {
    font-size: 28px;
  }
  
  .art-title {
    font-size: 32px;
  }
  
  .art-body {
    padding: 24px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 28px;
  }
  
  .show-title {
    font-size: 24px;
  }
  
  .req-grid {
    grid-template-columns: 1fr;
  }
  
  .dl-title {
    font-size: 32px;
  }
  
  .dl-win-top {
    flex-direction: column;
    text-align: center;
  }
}