/* ============================================
   HHPOKER 俱乐部联盟 — Luxury Gold on Black
   Premium Affiliate Landing Page Stylesheet
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Noto+Sans+SC:wght@300;400;500;700;900&display=swap');

/* ---------- CSS Variables ---------- */
:root {
  --gold:        #D4AF37;
  --gold-light:  #F0D78C;
  --gold-dark:   #B8941F;
  --gold-pale:   #FFF3CD;
  --dark-950:    #0A0A0A;
  --dark-900:    #111111;
  --dark-800:    #1A1A1A;
  --dark-700:    #222222;
  --dark-600:    #2A2A2A;
  --dark-500:    #3A3A3A;
  --text-primary:   #F5F5F5;
  --text-secondary: #AAAAAA;
  --text-muted:     #777777;
  --border-subtle:  rgba(212,175,55,0.15);
  --border-gold:    rgba(212,175,55,0.40);
  --glow-gold:      0 0 30px rgba(212,175,55,0.25);
  --glow-gold-strong: 0 0 60px rgba(212,175,55,0.40);
  --radius-sm:    6px;
  --radius-md:    12px;
  --radius-lg:    20px;
  --radius-xl:    28px;
  --transition:   0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--dark-950);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* subtle global noise texture overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

::selection {
  background: var(--gold);
  color: var(--dark-950);
}

a {
  color: var(--gold);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover {
  color: var(--gold-light);
}

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

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
}

.gradient-text {
  background: linear-gradient(135deg, #F0D78C 0%, #D4AF37 30%, #B8941F 50%, #D4AF37 70%, #F0D78C 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
  0%, 100% { background-position: 0% center; }
  50%      { background-position: 200% center; }
}

.gradient-text-static {
  background: linear-gradient(135deg, #F0D78C 0%, #D4AF37 50%, #B8941F 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---------- Gold Borders & Dividers ---------- */
.gold-border {
  border: 1px solid var(--border-gold);
}

.gold-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  border: none;
  margin: 0 auto;
}

.gold-divider-vertical {
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--gold), transparent);
}

/* ---------- Buttons ---------- */
.btn-gold {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 36px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--dark-950);
  background: linear-gradient(135deg, #F0D78C 0%, #D4AF37 40%, #B8941F 100%);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all var(--transition);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  box-shadow: 0 4px 20px rgba(212,175,55,0.30);
  z-index: 1;
}

.btn-gold::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #FFFFFF 0%, #F0D78C 40%, #D4AF37 100%);
  opacity: 0;
  transition: opacity var(--transition);
  z-index: -1;
}

.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 40px rgba(212,175,55,0.50);
  color: var(--dark-950);
}
.btn-gold:hover::before {
  opacity: 1;
}

.btn-gold:active {
  transform: translateY(0);
}

.btn-outline-gold {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 36px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--gold);
  background: transparent;
  border: 2px solid var(--gold);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.btn-outline-gold::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #D4AF37, #B8941F);
  opacity: 0;
  transition: opacity var(--transition);
  z-index: -1;
}

.btn-outline-gold:hover {
  color: var(--dark-950);
  border-color: var(--gold-light);
  transform: translateY(-2px);
  box-shadow: var(--glow-gold);
}
.btn-outline-gold:hover::before {
  opacity: 1;
}

/* ---------- Navbar ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: all var(--transition);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(10,10,10,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 10px 0;
  border-bottom: 1px solid var(--border-subtle);
  box-shadow: 0 4px 30px rgba(0,0,0,0.5);
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.05em;
}

.nav-logo .logo-icon {
  font-size: 1.6rem;
  color: var(--gold);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  position: relative;
  padding: 6px 0;
  transition: color var(--transition);
}

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

.nav-links a:hover,
.nav-links a.active {
  color: var(--gold);
}
.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-cta {
  padding: 10px 24px !important;
  font-size: 0.85rem !important;
}

.nav-cta::after {
  display: none !important;
}

/* Hamburger */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--gold);
  border-radius: 2px;
  transition: all var(--transition);
}

.menu-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}
.menu-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Nav */
.mobile-nav {
  position: fixed;
  top: 0;
  right: -100%;
  width: 280px;
  height: 100vh;
  background: rgba(17,17,17,0.98);
  backdrop-filter: blur(20px);
  z-index: 999;
  padding: 100px 40px 40px;
  transition: right var(--transition);
  border-left: 1px solid var(--border-subtle);
}

.mobile-nav.open {
  right: 0;
}

.mobile-nav a {
  display: block;
  color: var(--text-secondary);
  font-size: 1.1rem;
  padding: 14px 0;
  border-bottom: 1px solid var(--border-subtle);
  transition: color var(--transition);
}

.mobile-nav a:hover,
.mobile-nav a.active {
  color: var(--gold);
}

.mobile-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 998;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.mobile-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

/* ---------- Hero Section ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 120px 0 80px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(212,175,55,0.08) 0%, transparent 70%);
}

.hero-bg::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 40%;
  background: linear-gradient(to top, var(--dark-950), transparent);
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(212,175,55,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(212,175,55,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 60% 60% at 50% 35%, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 60% 60% at 50% 35%, black 30%, transparent 70%);
}

.hero-container {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-content {
  max-width: 600px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  border: 1px solid var(--border-gold);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--gold);
  background: rgba(212,175,55,0.06);
  margin-bottom: 28px;
  letter-spacing: 0.05em;
}

.hero-badge i {
  font-size: 0.7rem;
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 36px;
  line-height: 1.8;
}

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

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

.hero-image {
  border-radius: var(--radius-lg);
  box-shadow: var(--glow-gold-strong);
  position: relative;
  z-index: 1;
}

.hero-image-glow {
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(212,175,55,0.15) 0%, transparent 70%);
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  filter: blur(40px);
  animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.6; }
  50%      { transform: translate(-50%, -50%) scale(1.2); opacity: 1; }
}

.hero-stats-row {
  display: flex;
  gap: 40px;
  margin-top: 48px;
  padding-top: 36px;
  border-top: 1px solid var(--border-subtle);
}

.hero-stat-item {
  text-align: center;
}

.hero-stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--gold);
  font-family: 'Inter', sans-serif;
}

.hero-stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ---------- Section Common ---------- */
.section {
  padding: 100px 24px;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 64px;
}

.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--gold);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 16px;
}

.section-title {
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.8;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
}

/* ---------- Feature Cards ---------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: linear-gradient(145deg, rgba(26,26,26,0.8) 0%, rgba(17,17,17,0.95) 100%);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.feature-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-gold);
  box-shadow: var(--glow-gold);
}

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

.feature-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(212,175,55,0.12) 0%, rgba(212,175,55,0.04) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--gold);
  margin-bottom: 24px;
  transition: all var(--transition);
}

.feature-card:hover .feature-icon {
  background: linear-gradient(135deg, var(--gold-dark), rgba(212,175,55,0.2));
  box-shadow: 0 0 20px rgba(212,175,55,0.2);
}

.feature-card h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

.feature-card .feature-stat {
  display: inline-block;
  margin-top: 16px;
  font-size: 2rem;
  font-weight: 800;
  color: var(--gold);
}

/* ---------- Stats Section ---------- */
.stats-section {
  background: var(--dark-900);
  position: relative;
}

.stats-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.stat-card {
  padding: 32px 20px;
  position: relative;
}

.stat-card::after {
  content: '';
  position: absolute;
  right: 0;
  top: 20%;
  height: 60%;
  width: 1px;
  background: linear-gradient(180deg, transparent, rgba(212,175,55,0.2), transparent);
}

.stat-card:last-child::after {
  display: none;
}

.stat-icon {
  font-size: 2rem;
  color: var(--gold);
  margin-bottom: 16px;
}

.stat-number {
  font-size: 3rem;
  font-weight: 900;
  font-family: 'Inter', sans-serif;
  background: linear-gradient(135deg, #F0D78C, #D4AF37, #B8941F);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

.stat-suffix {
  font-size: 1.5rem;
  font-weight: 700;
}

.stat-label {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
}

/* ---------- Testimonials ---------- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.testimonial-card {
  background: linear-gradient(145deg, rgba(26,26,26,0.8), rgba(17,17,17,0.95));
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all var(--transition);
  position: relative;
}

.testimonial-card:hover {
  border-color: var(--border-gold);
  box-shadow: var(--glow-gold);
  transform: translateY(-4px);
}

.testimonial-quote {
  color: var(--gold);
  font-size: 2rem;
  line-height: 1;
  margin-bottom: 16px;
  opacity: 0.6;
}

.testimonial-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 24px;
  font-style: italic;
}

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

.testimonial-avatar {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 2px solid var(--gold);
  object-fit: cover;
}

.testimonial-name {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.testimonial-role {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.testimonial-stars {
  color: var(--gold);
  font-size: 0.8rem;
  margin-top: 4px;
}

/* ---------- FAQ Accordion ---------- */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--dark-800);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition);
}

.faq-item.active {
  border-color: var(--border-gold);
  box-shadow: 0 0 20px rgba(212,175,55,0.08);
}

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

.faq-question:hover {
  color: var(--gold);
}

.faq-icon {
  font-size: 1rem;
  color: var(--gold);
  transition: transform var(--transition);
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
}

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

.faq-answer-inner {
  padding: 0 24px 20px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* ---------- CTA Section ---------- */
.cta-section {
  position: relative;
  padding: 100px 24px;
  text-align: center;
  overflow: hidden;
}

.cta-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 50% 50%, rgba(212,175,55,0.06) 0%, transparent 70%),
    var(--dark-900);
}

.cta-content {
  position: relative;
  z-index: 1;
  max-width: 650px;
  margin: 0 auto;
}

.cta-title {
  font-size: 2.6rem;
  font-weight: 900;
  margin-bottom: 20px;
}

.cta-desc {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 36px;
  line-height: 1.8;
}

.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--dark-950);
  border-top: 1px solid var(--border-subtle);
  padding: 60px 24px 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  max-width: 1280px;
  margin: 0 auto;
}

.footer-brand-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-top: 16px;
}

.footer-col h4 {
  font-size: 1rem;
  color: var(--gold);
  margin-bottom: 20px;
  font-weight: 700;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color var(--transition);
}

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

.footer-bottom {
  max-width: 1280px;
  margin: 40px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

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

.footer-social a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 1rem;
  transition: all var(--transition);
}

.footer-social a:hover {
  border-color: var(--gold);
  color: var(--gold);
  box-shadow: 0 0 12px rgba(212,175,55,0.2);
}

/* ---------- Back to Top ---------- */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--gold-dark), var(--gold));
  color: var(--dark-950);
  border: none;
  border-radius: 50%;
  font-size: 1.1rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition);
  z-index: 100;
  box-shadow: 0 4px 20px rgba(212,175,55,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(212,175,55,0.5);
}

/* ---------- Reveal Animations ---------- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }
.reveal-delay-6 { transition-delay: 0.6s; }

/* ---------- About Page ---------- */
.timeline {
  position: relative;
  padding-left: 40px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--gold), transparent);
}

.timeline-item {
  position: relative;
  margin-bottom: 40px;
  padding-left: 30px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -29px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 16px rgba(212,175,55,0.4);
  border: 3px solid var(--dark-950);
}

.timeline-year {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--gold);
  margin-bottom: 6px;
}

.timeline-content {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

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

.value-card {
  text-align: center;
  padding: 36px 24px;
  background: var(--dark-800);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}

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

.value-icon {
  font-size: 2.2rem;
  color: var(--gold);
  margin-bottom: 18px;
}

/* ---------- Download Page ---------- */
.download-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.download-card {
  background: linear-gradient(145deg, rgba(26,26,26,0.8), rgba(17,17,17,0.95));
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 48px 32px;
  text-align: center;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.download-card.featured {
  border-color: var(--border-gold);
  box-shadow: var(--glow-gold);
}

.download-card.featured::before {
  content: '推荐';
  position: absolute;
  top: 20px;
  right: -30px;
  background: var(--gold);
  color: var(--dark-950);
  padding: 4px 40px;
  font-size: 0.75rem;
  font-weight: 700;
  transform: rotate(45deg);
}

.download-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-gold);
  box-shadow: var(--glow-gold);
}

.download-icon {
  font-size: 3rem;
  color: var(--gold);
  margin-bottom: 20px;
}

.download-card h3 {
  font-size: 1.3rem;
  margin-bottom: 8px;
}

.download-card .version {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 20px;
}

.download-card .features-list {
  list-style: none;
  text-align: left;
  margin-bottom: 28px;
}

.download-card .features-list li {
  color: var(--text-secondary);
  font-size: 0.9rem;
  padding: 6px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.download-card .features-list li i {
  color: var(--gold);
  font-size: 0.75rem;
}

.install-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 32px;
}

.install-step {
  text-align: center;
  position: relative;
}

.install-step-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gold-dark), var(--gold));
  color: var(--dark-950);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 800;
  margin: 0 auto 16px;
}

.install-step h4 {
  font-size: 0.95rem;
  margin-bottom: 6px;
}

.install-step p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.requirements-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 24px;
}

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

.requirements-table th {
  color: var(--gold);
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.requirements-table td {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ---------- Contact Page ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.contact-form {
  background: var(--dark-800);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 8px;
}

.form-group label .required {
  color: #E74C3C;
  margin-left: 3px;
}

.form-control {
  width: 100%;
  padding: 14px 18px;
  background: var(--dark-700);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: inherit;
  transition: all var(--transition);
  outline: none;
}

.form-control:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(212,175,55,0.1);
}

.form-control::placeholder {
  color: var(--text-muted);
}

textarea.form-control {
  resize: vertical;
  min-height: 140px;
}

.contact-info-cards {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-info-card {
  background: var(--dark-800);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  transition: all var(--transition);
}

.contact-info-card:hover {
  border-color: var(--border-gold);
}

.contact-info-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(212,175,55,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gold);
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-info-card h4 {
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.contact-info-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ---------- Alerts ---------- */
.alert {
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
  font-size: 0.95rem;
  font-weight: 500;
}

.alert-success {
  background: rgba(46,204,113,0.1);
  border: 1px solid rgba(46,204,113,0.3);
  color: #2ECC71;
}

.alert-error {
  background: rgba(231,76,60,0.1);
  border: 1px solid rgba(231,76,60,0.3);
  color: #E74C3C;
}

/* ---------- Page Banner (inner pages) ---------- */
.page-banner {
  padding: 160px 24px 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(212,175,55,0.06) 0%, transparent 70%);
}

.page-banner h1 {
  font-size: 2.8rem;
  font-weight: 900;
  margin-bottom: 16px;
}

.page-banner .breadcrumb {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.page-banner .breadcrumb a {
  color: var(--gold);
}

/* ---------- Responsive ---------- */

/* Tablet (max-width: 1024px) */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-content {
    max-width: 100%;
    order: 2;
  }
  .hero-image-wrapper {
    order: 1;
  }
  .hero-buttons {
    justify-content: center;
  }
  .hero-stats-row {
    justify-content: center;
  }
  .hero-title {
    font-size: 2.5rem;
  }

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

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stat-card::after {
    display: none;
  }

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

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

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

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

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

/* Mobile (max-width: 768px) */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .menu-toggle {
    display: flex;
  }

  .hero-title {
    font-size: 2rem;
  }
  .hero-subtitle {
    font-size: 1rem;
  }
  .hero-stats-row {
    flex-wrap: wrap;
    gap: 20px;
  }

  .section {
    padding: 64px 20px;
  }
  .section-title {
    font-size: 1.8rem;
  }

  .features-grid,
  .testimonials-grid {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
  .stat-number {
    font-size: 2.2rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

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

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

  .install-steps {
    grid-template-columns: 1fr 1fr;
  }

  .cta-title {
    font-size: 1.8rem;
  }
  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }

  .contact-form {
    padding: 28px 20px;
  }

  .page-banner {
    padding: 140px 20px 60px;
  }
  .page-banner h1 {
    font-size: 2rem;
  }

  .timeline {
    padding-left: 24px;
  }
  .timeline-item {
    padding-left: 20px;
  }
  .timeline-item::before {
    left: -19px;
    width: 10px;
    height: 10px;
  }

  .requirements-table {
    font-size: 0.8rem;
  }
  .requirements-table th,
  .requirements-table td {
    padding: 10px 12px;
  }
}

/* Small Mobile (max-width: 480px) */
@media (max-width: 480px) {
  .hero-title {
    font-size: 1.7rem;
  }

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

  .btn-gold,
  .btn-outline-gold {
    padding: 12px 24px;
    font-size: 0.9rem;
  }

  .hero-buttons {
    flex-direction: column;
  }
}