/* ============================================================
   HHPoker 德扑圈俱乐部 — Clean Professional Green Theme
   Shared Stylesheet for all pages
   ============================================================ */

/* ---------- CSS Variables ---------- */
:root {
  --green-50:  #ecfdf5;
  --green-100: #d1fae5;
  --green-200: #a7f3d0;
  --green-300: #6ee7b7;
  --green-400: #34d399;
  --green-500: #10b981;
  --green-600: #059669;
  --green-700: #047857;
  --green-800: #065f46;
  --green-900: #064e3b;

  --gray-50:  #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;

  --white:    #ffffff;
  --black:    #000000;

  --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;

  --shadow-sm:   0 1px 2px 0 rgba(0,0,0,0.05);
  --shadow-md:   0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg:   0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
  --shadow-xl:   0 20px 25px -5px rgba(0,0,0,0.10), 0 8px 10px -6px rgba(0,0,0,0.04);
  --shadow-card: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--gray-700);
  background-color: var(--white);
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-fast);
}

ul, ol {
  list-style: none;
}

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

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

input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-label {
  display: inline-block;
  padding: 6px 16px;
  background-color: var(--green-100);
  color: var(--green-700);
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
  margin-bottom: 16px;
  text-transform: uppercase;
}

.section-title {
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 16px;
  line-height: 1.3;
}

.section-title .highlight {
  color: var(--green-600);
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--gray-500);
  max-width: 600px;
  margin: 0 auto;
}

/* ---------- 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-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
  letter-spacing: 0.3px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--green-600), var(--green-500));
  color: var(--white);
  box-shadow: 0 4px 14px rgba(5, 150, 105, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--green-700), var(--green-600));
  box-shadow: 0 6px 20px rgba(5, 150, 105, 0.45);
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: transparent;
  color: var(--green-600);
  border: 2px solid var(--green-500);
}

.btn-secondary:hover {
  background-color: var(--green-600);
  color: var(--white);
  border-color: var(--green-600);
  transform: translateY(-2px);
}

.btn-white {
  background-color: var(--white);
  color: var(--green-600);
  box-shadow: var(--shadow-md);
}

.btn-white:hover {
  background-color: var(--gray-50);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.1rem;
  border-radius: var(--radius-lg);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.875rem;
  border-radius: var(--radius-sm);
}

/* ---------- NAVBAR ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
  transition: box-shadow var(--transition-normal);
}

.navbar.scrolled {
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--green-700);
  letter-spacing: 0.5px;
}

.nav-logo i {
  font-size: 1.5rem;
  color: var(--green-500);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--gray-600);
  position: relative;
  padding: 4px 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--green-500);
  transition: width var(--transition-normal);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--green-600);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  gap: 5px;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2.5px;
  background-color: var(--gray-700);
  border-radius: 3px;
  transition: all var(--transition-normal);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.hamburger.active span:nth-child(2) {
  opacity: 0;
}
.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--white);
  flex-direction: column;
  align-items: center;
  padding: 40px 20px;
  gap: 24px;
  z-index: 999;
  overflow-y: auto;
}

.mobile-menu.active {
  display: flex;
}

.mobile-menu a {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--gray-700);
  padding: 12px 0;
  width: 100%;
  text-align: center;
  border-bottom: 1px solid var(--gray-100);
}

.mobile-menu a:hover,
.mobile-menu a.active {
  color: var(--green-600);
}

/* ---------- FOOTER ---------- */
.footer {
  background-color: var(--gray-900);
  color: var(--gray-300);
  padding-top: 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px 60px;
}

.footer-col h3 {
  color: var(--white);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 24px;
  position: relative;
}

.footer-col h3::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 32px;
  height: 3px;
  background-color: var(--green-500);
  border-radius: 2px;
}

.footer-col p {
  font-size: 0.925rem;
  line-height: 1.8;
  margin-bottom: 20px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col ul li a {
  font-size: 0.925rem;
  color: var(--gray-400);
  transition: color var(--transition-fast);
}

.footer-col ul li a:hover {
  color: var(--green-400);
}

.footer-social {
  display: flex;
  gap: 12px;
  margin-top: 16px;
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: var(--gray-800);
  color: var(--gray-400);
  border-radius: var(--radius-sm);
  font-size: 1.1rem;
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background-color: var(--green-600);
  color: var(--white);
  transform: translateY(-2px);
}

.footer-bottom {
  border-top: 1px solid var(--gray-800);
  padding: 24px 20px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--gray-500);
}

.footer-bottom a {
  color: var(--green-400);
}

.footer-bottom a:hover {
  color: var(--green-300);
}

/* ---------- HERO SECTION ---------- */
.hero {
  padding: 160px 0 100px;
  background-color: var(--white);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(16,185,129,0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -150px;
  left: -150px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(5,150,105,0.06) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  position: relative;
  z-index: 1;
}

.hero-text h1 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.2;
  color: var(--gray-900);
  margin-bottom: 20px;
}

.hero-text h1 .highlight {
  color: var(--green-600);
  position: relative;
}

.hero-text h1 .highlight::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0;
  right: 0;
  height: 8px;
  background-color: var(--green-200);
  border-radius: 4px;
  z-index: -1;
  opacity: 0.6;
}

.hero-text p {
  font-size: 1.15rem;
  color: var(--gray-500);
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 520px;
}

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

.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  max-width: 100%;
}

/* ---------- FEATURES SECTION ---------- */
.features-section {
  background-color: var(--gray-50);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.feature-card {
  background-color: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  text-align: center;
  box-shadow: var(--shadow-card);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--green-400), var(--green-600));
  opacity: 0;
  transition: opacity var(--transition-normal);
}

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

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  background-color: var(--green-50);
  color: var(--green-600);
  font-size: 2rem;
  border-radius: 50%;
  margin-bottom: 24px;
  transition: all var(--transition-normal);
}

.feature-card:hover .feature-icon {
  background-color: var(--green-600);
  color: var(--white);
  transform: scale(1.1);
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--gray-500);
  line-height: 1.8;
}

/* ---------- STATS SECTION ---------- */
.stats-section {
  background-color: var(--white);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.stat-item {
  text-align: center;
  padding: 32px 20px;
}

.stat-number {
  font-size: 3.2rem;
  font-weight: 800;
  color: var(--green-600);
  line-height: 1.1;
  margin-bottom: 8px;
  font-variant-numeric: tabular-nums;
}

.stat-suffix {
  font-size: 2rem;
  font-weight: 700;
  color: var(--green-500);
}

.stat-label {
  font-size: 1rem;
  color: var(--gray-500);
  font-weight: 500;
}

/* ---------- TESTIMONIALS SECTION ---------- */
.testimonials-section {
  background-color: var(--gray-50);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.testimonial-card {
  background-color: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  box-shadow: var(--shadow-card);
  transition: all var(--transition-normal);
  position: relative;
}

.testimonial-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.testimonial-quote {
  font-size: 4rem;
  color: var(--green-200);
  line-height: 1;
  margin-bottom: -8px;
  font-family: Georgia, serif;
}

.testimonial-text {
  font-size: 0.975rem;
  color: var(--gray-600);
  line-height: 1.8;
  margin-bottom: 24px;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 14px;
}

.testimonial-author img {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--green-100);
}

.testimonial-author h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 2px;
}

.testimonial-author span {
  font-size: 0.85rem;
  color: var(--gray-400);
}

.testimonial-stars {
  color: #f59e0b;
  font-size: 0.9rem;
  margin-bottom: 12px;
}

/* ---------- FAQ SECTION ---------- */
.faq-section {
  background-color: var(--white);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px;
}

.faq-item {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  overflow: hidden;
  transition: all var(--transition-fast);
  background-color: var(--white);
}

.faq-item:hover {
  border-color: var(--green-300);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 20px 24px;
  background: none;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--gray-800);
  cursor: pointer;
  gap: 16px;
}

.faq-question span:first-child {
  flex: 1;
}

.faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--green-50);
  color: var(--green-600);
  border-radius: 50%;
  font-size: 0.8rem;
  transition: all var(--transition-normal);
}

.faq-item.active .faq-icon {
  background-color: var(--green-600);
  color: var(--white);
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow), padding var(--transition-normal);
}

.faq-item.active .faq-answer {
  max-height: 400px;
}

.faq-answer-inner {
  padding: 0 24px 24px;
  font-size: 0.95rem;
  color: var(--gray-500);
  line-height: 1.8;
}

/* ---------- CTA SECTION ---------- */
.cta-section {
  background: linear-gradient(135deg, var(--green-600), var(--green-500));
  padding: 100px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.cta-section::after {
  content: '';
  position: absolute;
  bottom: -40%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.cta-inner {
  position: relative;
  z-index: 1;
  max-width: 700px;
  margin: 0 auto;
  padding: 0 20px;
}

.cta-section h2 {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 20px;
  line-height: 1.3;
}

.cta-section p {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.85);
  margin-bottom: 36px;
  line-height: 1.8;
}

.cta-section .btn-white {
  color: var(--green-600);
}

/* ---------- PAGE HERO BANNER (sub-pages) ---------- */
.page-hero {
  padding: 160px 0 80px;
  background: linear-gradient(135deg, var(--green-50), var(--white));
  text-align: center;
  position: relative;
}

.page-hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, transparent, var(--green-400), transparent);
}

.page-hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: 16px;
}

.page-hero p {
  font-size: 1.1rem;
  color: var(--gray-500);
  max-width: 600px;
  margin: 0 auto;
}

/* ---------- ABOUT PAGE ---------- */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.about-intro-text h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 20px;
}

.about-intro-text h2 .highlight {
  color: var(--green-600);
}

.about-intro-text p {
  font-size: 1.05rem;
  color: var(--gray-500);
  line-height: 1.9;
  margin-bottom: 24px;
}

.about-intro-image img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

/* Timeline */
.timeline {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px;
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(to bottom, transparent, var(--green-300), var(--green-600), var(--green-300), transparent);
  transform: translateX(-50%);
}

.timeline-item {
  display: flex;
  align-items: flex-start;
  margin-bottom: 48px;
  position: relative;
}

.timeline-item:nth-child(odd) {
  flex-direction: row;
}

.timeline-item:nth-child(even) {
  flex-direction: row-reverse;
}

.timeline-content {
  width: calc(50% - 40px);
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
  transition: all var(--transition-normal);
}

.timeline-content:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--green-300);
}

.timeline-year {
  display: inline-block;
  padding: 4px 14px;
  background-color: var(--green-100);
  color: var(--green-700);
  font-size: 0.85rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  margin-bottom: 8px;
}

.timeline-content h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 6px;
}

.timeline-content p {
  font-size: 0.9rem;
  color: var(--gray-500);
  line-height: 1.7;
}

.timeline-dot {
  position: absolute;
  left: 50%;
  top: 24px;
  transform: translateX(-50%);
  width: 16px;
  height: 16px;
  background-color: var(--green-500);
  border: 4px solid var(--green-100);
  border-radius: 50%;
  z-index: 1;
}

/* Values Grid */
.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.value-card {
  background-color: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 36px 24px;
  text-align: center;
  box-shadow: var(--shadow-card);
  transition: all var(--transition-normal);
}

.value-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--green-300);
}

.value-card .value-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 68px;
  height: 68px;
  background-color: var(--green-50);
  color: var(--green-600);
  font-size: 1.8rem;
  border-radius: 50%;
  margin-bottom: 20px;
  transition: all var(--transition-normal);
}

.value-card:hover .value-icon {
  background-color: var(--green-600);
  color: var(--white);
  transform: rotateY(180deg);
}

.value-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 10px;
}

.value-card p {
  font-size: 0.925rem;
  color: var(--gray-500);
  line-height: 1.7;
}

/* ---------- DOWNLOAD PAGE ---------- */
.platform-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.platform-tab {
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-600);
  background-color: var(--white);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 10px;
}

.platform-tab i {
  font-size: 1.3rem;
}

.platform-tab:hover {
  border-color: var(--green-300);
  color: var(--green-600);
}

.platform-tab.active {
  background-color: var(--green-600);
  color: var(--white);
  border-color: var(--green-600);
  box-shadow: 0 4px 14px rgba(5, 150, 105, 0.35);
}

.platform-panel {
  display: none;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px;
}

.platform-panel.active {
  display: block;
}

.platform-panel-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.platform-info h3 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 12px;
}

.platform-info p {
  font-size: 1rem;
  color: var(--gray-500);
  line-height: 1.8;
  margin-bottom: 24px;
}

.download-steps {
  margin: 24px 0;
}

.download-step {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 20px;
}

.step-number {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  background-color: var(--green-600);
  color: var(--white);
  font-weight: 700;
  font-size: 1rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-text h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 4px;
}

.step-text p {
  font-size: 0.9rem;
  color: var(--gray-500);
  margin-bottom: 0;
}

.platform-qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: var(--white);
  border: 2px dashed var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
}

.qr-placeholder {
  width: 180px;
  height: 180px;
  background: linear-gradient(135deg, var(--green-50), var(--gray-100));
  border: 2px solid var(--green-200);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--green-600);
  font-size: 4rem;
  margin-bottom: 16px;
}

.platform-qr p {
  font-size: 0.9rem;
  color: var(--gray-500);
}

/* System Requirements */
.req-section {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px;
}

.req-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.req-table thead th {
  background-color: var(--green-600);
  color: var(--white);
  padding: 16px 20px;
  text-align: left;
  font-weight: 600;
  font-size: 0.95rem;
}

.req-table tbody td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--gray-100);
  font-size: 0.925rem;
  color: var(--gray-600);
}

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

.req-table tbody tr:nth-child(even) {
  background-color: var(--gray-50);
}

.req-table tbody tr:hover {
  background-color: var(--green-50);
}

/* App Screenshots */
.screenshots-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 20px;
}

.screenshot-item {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.screenshot-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

.screenshot-item img {
  width: 100%;
  height: auto;
  display: block;
}

/* ---------- SCROLL TO TOP ---------- */
.scroll-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  background-color: var(--green-600);
  color: var(--white);
  border: none;
  border-radius: 50%;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(5, 150, 105, 0.35);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  z-index: 999;
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
}

.scroll-top:hover {
  background-color: var(--green-700);
  transform: translateY(-4px);
  box-shadow: 0 6px 24px rgba(5, 150, 105, 0.45);
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-text p {
    max-width: 100%;
  }
  .hero-buttons {
    justify-content: center;
  }
  .hero-image {
    order: -1;
  }
  .hero-image img {
    max-width: 400px;
  }

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

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

  .testimonials-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
  }

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

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

  .about-intro {
    grid-template-columns: 1fr;
  }

  .about-intro-image {
    order: -1;
    max-width: 500px;
    margin: 0 auto;
  }

  .platform-panel-inner {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 768px) {
  .nav-links,
  .nav-cta {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .section {
    padding: 70px 0;
  }

  .hero {
    padding: 130px 0 70px;
  }

  .hero-text h1 {
    font-size: 2.2rem;
  }

  .section-title {
    font-size: 1.8rem;
  }

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

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

  .stat-number {
    font-size: 2.4rem;
  }

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

  .timeline::before {
    left: 20px;
  }

  .timeline-item,
  .timeline-item:nth-child(even) {
    flex-direction: row;
  }

  .timeline-content {
    width: calc(100% - 60px);
    margin-left: 60px;
  }

  .timeline-dot {
    left: 20px;
  }

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

  .page-hero {
    padding: 130px 0 60px;
  }

  .page-hero h1 {
    font-size: 2rem;
  }

  .platform-panel-inner {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 480px) {
  .hero-text h1 {
    font-size: 1.8rem;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .hero-buttons .btn {
    width: 100%;
  }

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

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

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

  .platform-tabs {
    flex-direction: column;
    align-items: center;
  }

  .platform-tab {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }

  .scroll-top {
    bottom: 20px;
    right: 20px;
    width: 42px;
    height: 42px;
  }
}