/* ========================================
   聆貅 LINGXIU — 品牌官网样式
   配色：玄墨 #0A0A0F / 赤金 #C8A464 / 青黛 #4A6C8C / 牙白 #F5F0E8 / 雾灰 #8A8478
   ======================================== */

/* CSS Variables */
:root {
  --color-ink: #0A0A0F;
  --color-ink-soft: #14141C;
  --color-gold: #C8A464;
  --color-gold-light: #D4B87A;
  --color-gold-dim: rgba(200, 164, 100, 0.3);
  --color-blue: #4A6C8C;
  --color-white: #F5F0E8;
  --color-gray: #8A8478;
  --color-dark: #2A2A35;
  --color-dark-soft: #1E1E28;

  --font-serif-cn: "Lingxiu Serif CN", "Songti SC", "SimSun", serif;
  --font-sans-cn: "Lingxiu Sans CN", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-serif-en: "Oranienbaum", "Cinzel", "Georgia", serif;
  --font-sans-en: "Lingxiu Sans EN", "Inter", "system-ui", -apple-system, sans-serif;

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

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

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

body {
  font-family: var(--font-sans-cn);
  background: var(--color-ink);
  color: var(--color-white);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

ul {
  list-style: none;
}

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

/* Particle Canvas */
#particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.6;
}

/* Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 1.2rem 0;
  background: transparent;
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(10, 10, 15, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(200, 164, 100, 0.12);
  padding: 0.8rem 0;
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.nav-logo-cn {
  font-family: var(--font-serif-cn);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-gold);
  letter-spacing: 0.1em;
}

.nav-logo-en {
  font-family: var(--font-serif-en);
  font-size: 0.85rem;
  color: var(--color-gray);
  letter-spacing: 0.2em;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.nav-link {
  font-size: 0.9rem;
  color: var(--color-white);
  opacity: 0.7;
  transition: var(--transition);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  opacity: 1;
  color: var(--color-gold);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--color-gold);
}

.nav-cta {
  padding: 0.5rem 1.5rem;
  border: 1px solid var(--color-gold);
  border-radius: 2px;
  color: var(--color-gold) !important;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  opacity: 1 !important;
  transition: var(--transition);
}

.nav-cta:hover {
  background: var(--color-gold);
  color: var(--color-ink) !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-gold);
  transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  z-index: 1;
}

.hero-bg-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(ellipse at 30% 40%, rgba(200, 164, 100, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 70% 60%, rgba(74, 108, 140, 0.06) 0%, transparent 50%);
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 0 2rem;
  animation: fadeInUp 1.2s ease;
}

.hero-eyebrow {
  font-family: var(--font-serif-en);
  font-size: 0.85rem;
  letter-spacing: 0.4em;
  color: var(--color-gold);
  margin-bottom: 1.5rem;
  text-transform: uppercase;
}

.hero-title {
  margin-bottom: 1.5rem;
}

.hero-title-cn {
  display: block;
  font-family: var(--font-serif-cn);
  font-size: 5rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 0.3em;
  margin-bottom: 0.5rem;
  text-shadow: 0 0 60px rgba(200, 164, 100, 0.3);
}

.hero-title-en {
  display: block;
  font-family: var(--font-serif-en);
  font-size: 1.5rem;
  letter-spacing: 0.5em;
  color: var(--color-gold);
}

.hero-slogan {
  font-family: var(--font-serif-cn);
  font-size: 2rem;
  font-weight: 400;
  color: var(--color-white);
  letter-spacing: 0.4em;
  margin-bottom: 1rem;
  padding: 0 0 0 0.4em;
}

.hero-subtitle {
  font-size: 0.95rem;
  color: var(--color-gray);
  letter-spacing: 0.05em;
  max-width: 540px;
  margin: 0 auto 2.5rem;
  line-height: 1.8;
}

.hero-cta-group {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 3.5rem;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.8rem 2.2rem;
  font-size: 0.9rem;
  font-family: var(--font-sans-cn);
  letter-spacing: 0.1em;
  border: none;
  border-radius: 2px;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
}

.btn-primary {
  background: var(--color-gold);
  color: var(--color-ink);
  font-weight: 500;
}

.btn-primary:hover {
  background: var(--color-gold-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(200, 164, 100, 0.3);
}

.btn-ghost {
  background: transparent;
  border: 1px solid rgba(245, 240, 232, 0.3);
  color: var(--color-white);
}

.btn-ghost:hover {
  border-color: var(--color-gold);
  color: var(--color-gold);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--color-gold-dim);
  color: var(--color-gold);
}

.btn-outline:hover {
  border-color: var(--color-gold);
  background: rgba(200, 164, 100, 0.08);
}

.btn-full {
  width: 100%;
}

/* Hero Trust Indicators */
.hero-trust {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--color-gray);
  letter-spacing: 0.05em;
}

.trust-icon {
  color: var(--color-gold);
  font-size: 0.6rem;
}

.trust-divider {
  width: 1px;
  height: 12px;
  background: rgba(138, 132, 120, 0.4);
}

/* Hero Scroll */
.hero-scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  z-index: 2;
}

.hero-scroll span {
  font-family: var(--font-serif-en);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  color: var(--color-gray);
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--color-gold), transparent);
  animation: scrollLine 2s ease infinite;
}

/* ========================================
   Section Common
   ======================================== */
.section {
  position: relative;
  padding: 7rem 0;
  z-index: 1;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-number {
  font-family: var(--font-serif-en);
  font-size: 0.9rem;
  letter-spacing: 0.3em;
  color: var(--color-gold);
  display: block;
  margin-bottom: 0.8rem;
}

.section-title {
  font-family: var(--font-serif-cn);
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--color-white);
  letter-spacing: 0.15em;
  margin-bottom: 0.5rem;
}

.section-subtitle {
  font-family: var(--font-serif-en);
  font-size: 0.8rem;
  letter-spacing: 0.3em;
  color: var(--color-gray);
  text-transform: uppercase;
}

/* ========================================
   About Section
   ======================================== */
.about {
  background: var(--color-ink-soft);
}

.about-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 4rem;
}

.about-card {
  background: var(--color-dark);
  padding: 2.5rem 2rem;
  border-radius: 4px;
  border: 1px solid rgba(200, 164, 100, 0.08);
  transition: var(--transition);
  text-align: center;
}

.about-card:hover {
  border-color: rgba(200, 164, 100, 0.3);
  transform: translateY(-4px);
}

.about-card-icon {
  font-family: var(--font-serif-cn);
  font-size: 2rem;
  color: var(--color-gold);
  margin-bottom: 1.2rem;
  opacity: 0.8;
}

.about-card h3 {
  font-family: var(--font-serif-cn);
  font-size: 1.25rem;
  color: var(--color-white);
  margin-bottom: 1rem;
  letter-spacing: 0.1em;
}

.about-card p {
  font-size: 0.9rem;
  color: var(--color-gray);
  line-height: 1.8;
}

.about-values {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  padding-top: 3rem;
  border-top: 1px solid rgba(200, 164, 100, 0.1);
}

.value-item {
  text-align: left;
  padding-left: 1.5rem;
  border-left: 2px solid var(--color-gold-dim);
}

.value-num {
  font-family: var(--font-serif-en);
  font-size: 0.85rem;
  color: var(--color-gold);
  letter-spacing: 0.2em;
}

.value-item h4 {
  font-family: var(--font-serif-cn);
  font-size: 1.1rem;
  color: var(--color-white);
  margin: 0.5rem 0 0.8rem;
  letter-spacing: 0.1em;
}

.value-item p {
  font-size: 0.85rem;
  color: var(--color-gray);
  line-height: 1.7;
}

/* ========================================
   Products Section
   ======================================== */
.products {
  background: var(--color-ink);
}

.membership-tiers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 5rem;
}

.tier-card {
  background: var(--color-dark);
  border-radius: 6px;
  padding: 2.5rem 2rem;
  border: 1px solid rgba(200, 164, 100, 0.08);
  text-align: center;
  position: relative;
  transition: var(--transition);
}

.tier-card:hover {
  border-color: rgba(200, 164, 100, 0.25);
  transform: translateY(-4px);
}

.tier-featured {
  border-color: var(--color-gold);
  background: linear-gradient(180deg, var(--color-dark) 0%, var(--color-dark-soft) 100%);
  transform: scale(1.03);
  box-shadow: 0 10px 50px rgba(200, 164, 100, 0.1);
}

.tier-featured:hover {
  transform: scale(1.03) translateY(-4px);
}

.tier-badge {
  display: inline-block;
  font-family: var(--font-serif-cn);
  font-size: 1.3rem;
  color: var(--color-gold);
  letter-spacing: 0.2em;
  margin-bottom: 0.3rem;
}

.tier-name-en {
  font-family: var(--font-serif-en);
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  color: var(--color-gray);
  margin-bottom: 1.5rem;
}

.tier-price {
  margin-bottom: 1rem;
}

.tier-price-num {
  font-family: var(--font-serif-en);
  font-size: 2.5rem;
  color: var(--color-white);
}

.tier-price-unit {
  font-size: 0.8rem;
  color: var(--color-gray);
  margin-left: 0.3rem;
}

.tier-desc {
  font-size: 0.85rem;
  color: var(--color-gray);
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid rgba(200, 164, 100, 0.1);
}

.tier-recommend {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--color-gold);
  color: var(--color-ink);
  font-size: 0.7rem;
  padding: 0.2rem 0.8rem;
  border-radius: 2px;
  font-weight: 500;
  letter-spacing: 0.1em;
}

.tier-features {
  text-align: left;
  margin-bottom: 2rem;
}

.tier-features li {
  font-size: 0.85rem;
  color: var(--color-white);
  opacity: 0.8;
  padding: 0.5rem 0;
  padding-left: 1.5rem;
  position: relative;
}

.tier-features li::before {
  content: '◆';
  position: absolute;
  left: 0;
  color: var(--color-gold);
  font-size: 0.6rem;
  top: 0.65rem;
}

/* Product Matrix */
.product-matrix {
  padding-top: 3rem;
  border-top: 1px solid rgba(200, 164, 100, 0.1);
}

.matrix-title {
  font-family: var(--font-serif-cn);
  font-size: 1.5rem;
  color: var(--color-white);
  text-align: center;
  letter-spacing: 0.15em;
  margin-bottom: 2.5rem;
}

.matrix-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.matrix-item {
  background: var(--color-dark);
  padding: 1.8rem 1.5rem;
  border-radius: 4px;
  border: 1px solid rgba(200, 164, 100, 0.06);
  transition: var(--transition);
  position: relative;
}

.matrix-item:hover {
  border-color: rgba(200, 164, 100, 0.2);
  background: var(--color-dark-soft);
}

.matrix-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-gold-dim);
  border-radius: 50%;
  font-family: var(--font-serif-cn);
  font-size: 1rem;
  color: var(--color-gold);
  margin-bottom: 1rem;
}

.matrix-item h4 {
  font-family: var(--font-serif-cn);
  font-size: 1rem;
  color: var(--color-white);
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
}

.matrix-item p {
  font-size: 0.8rem;
  color: var(--color-gray);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.matrix-tag {
  display: inline-block;
  font-size: 0.7rem;
  color: var(--color-gold);
  border: 1px solid var(--color-gold-dim);
  padding: 0.15rem 0.6rem;
  border-radius: 2px;
  letter-spacing: 0.05em;
}

/* ========================================
   Contact Section
   ======================================== */
.contact {
  background: var(--color-ink-soft);
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
}

.contact-form-side {
  background: var(--color-dark);
  padding: 3rem;
  border-radius: 6px;
  border: 1px solid rgba(200, 164, 100, 0.08);
}

.contact-form-title {
  font-family: var(--font-serif-cn);
  font-size: 1.5rem;
  color: var(--color-gold);
  margin-bottom: 0.5rem;
  letter-spacing: 0.1em;
}

.contact-form-desc {
  font-size: 0.85rem;
  color: var(--color-gray);
  margin-bottom: 2rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group label {
  font-size: 0.8rem;
  color: var(--color-gray);
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
}

.form-group input,
.form-group select,
.form-group textarea {
  background: var(--color-ink);
  border: 1px solid rgba(200, 164, 100, 0.1);
  border-radius: 3px;
  padding: 0.8rem 1rem;
  color: var(--color-white);
  font-size: 0.9rem;
  font-family: var(--font-sans-cn);
  transition: var(--transition);
  resize: vertical;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-gold);
  background: var(--color-dark-soft);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(138, 132, 120, 0.5);
}

.form-feedback {
  font-size: 0.85rem;
  text-align: center;
  min-height: 1.2em;
}

.form-feedback.success {
  color: var(--color-gold);
}

.form-feedback.error {
  color: #e07070;
}

/* Contact Info Side */
.contact-info-side {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-info-card {
  padding: 1.2rem 1.5rem;
  border-left: 2px solid var(--color-gold-dim);
  transition: var(--transition);
}

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

.contact-info-card h4 {
  font-size: 0.75rem;
  color: var(--color-gray);
  letter-spacing: 0.15em;
  margin-bottom: 0.4rem;
  text-transform: uppercase;
}

.contact-info-value {
  font-family: var(--font-serif-en);
  font-size: 1.1rem;
  color: var(--color-white);
  letter-spacing: 0.05em;
}

.contact-info-sub {
  font-size: 0.75rem;
  color: var(--color-gray);
  margin-top: 0.2rem;
}

.contact-quote {
  margin-top: 1rem;
  padding: 1.5rem;
  background: rgba(200, 164, 100, 0.05);
  border-radius: 4px;
  text-align: center;
}

.contact-quote p {
  font-family: var(--font-serif-cn);
  font-size: 1.1rem;
  color: var(--color-gold);
  letter-spacing: 0.15em;
}

.contact-quote-sub {
  font-family: var(--font-serif-en);
  font-size: 0.8rem;
  color: var(--color-gray);
  margin-top: 0.5rem !important;
  letter-spacing: 0.2em;
}

/* ========================================
   Footer
   ======================================== */
.footer {
  background: var(--color-ink);
  padding: 3rem 0 2rem;
  border-top: 1px solid rgba(200, 164, 100, 0.1);
  position: relative;
  z-index: 1;
}

.footer-content {
  text-align: center;
}

.footer-brand {
  display: flex;
  justify-content: center;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 0.8rem;
}

.footer-brand-cn {
  font-family: var(--font-serif-cn);
  font-size: 1.8rem;
  color: var(--color-gold);
  letter-spacing: 0.15em;
}

.footer-brand-en {
  font-family: var(--font-serif-en);
  font-size: 0.9rem;
  color: var(--color-gray);
  letter-spacing: 0.2em;
}

.footer-slogan {
  font-family: var(--font-serif-cn);
  font-size: 1rem;
  color: var(--color-white);
  letter-spacing: 0.3em;
  margin-bottom: 0.5rem;
}

.footer-desc {
  font-size: 0.8rem;
  color: var(--color-gray);
  margin-bottom: 1.5rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--color-gray);
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--color-gold);
}

.footer-bottom {
  padding-top: 1.5rem;
  border-top: 1px solid rgba(200, 164, 100, 0.08);
}

.footer-bottom p {
  font-size: 0.75rem;
  color: var(--color-gray);
  opacity: 0.6;
}

.footer-disclaimer {
  margin-top: 0.3rem !important;
}

/* ========================================
   Reveal Animation
   ======================================== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ========================================
   Keyframe Animations
   ======================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scrollLine {
  0% {
    transform: scaleY(0);
    transform-origin: top;
  }
  50% {
    transform: scaleY(1);
    transform-origin: top;
  }
  51% {
    transform-origin: bottom;
  }
  100% {
    transform: scaleY(0);
    transform-origin: bottom;
  }
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 968px) {
  .about-cards,
  .about-values,
  .membership-tiers {
    grid-template-columns: 1fr;
  }

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

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

  .tier-featured {
    transform: none;
  }

  .tier-featured:hover {
    transform: translateY(-4px);
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background: rgba(10, 10, 15, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    transition: right 0.4s ease;
  }

  .nav-menu.active {
    right: 0;
  }

  .nav-menu .nav-link {
    font-size: 1.2rem;
  }

  .nav-toggle {
    display: flex;
  }

  .hero-title-cn {
    font-size: 3rem;
  }

  .hero-title-en {
    font-size: 1.1rem;
  }

  .hero-slogan {
    font-size: 1.4rem;
  }

  .hero-subtitle {
    font-size: 0.85rem;
  }

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

  .hero-trust {
    gap: 0.8rem;
  }

  .trust-divider {
    display: none;
  }

  .section {
    padding: 5rem 0;
  }

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

  .container {
    padding: 0 1.5rem;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .contact-form-side {
    padding: 2rem 1.5rem;
  }

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

  .footer-links {
    flex-wrap: wrap;
    gap: 1rem;
  }
}

/* ========================================
   Accessibility — Reduced Motion
   ======================================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ========================================
   Invite Code Login Modal
   ======================================== */

.invite-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 9999;
  display: none;
  align-items: center;
  justify-content: center;
}

.invite-modal.active {
  display: flex;
}

.invite-modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(8px);
}

.invite-modal-card {
  position: relative;
  width: 420px;
  max-width: 90vw;
  background: var(--color-dark);
  border: 1px solid var(--color-gold);
  border-radius: 16px;
  overflow: hidden;
  animation: inviteCardIn 0.4s ease-out;
}

@keyframes inviteCardIn {
  from { opacity: 0; transform: translateY(30px) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.invite-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid rgba(200, 164, 100, 0.2);
}

.invite-modal-logo {
  display: flex;
  align-items: center;
  gap: 8px;
}

.invite-logo-cn {
  font-family: var(--font-cn-title);
  font-size: 20px;
  color: var(--color-gold);
  font-weight: 600;
}

.invite-logo-en {
  font-family: var(--font-en-title);
  font-size: 12px;
  color: var(--color-muted);
  letter-spacing: 2px;
}

.invite-modal-close {
  width: 32px;
  height: 32px;
  background: transparent;
  border: 1px solid rgba(200, 164, 100, 0.3);
  border-radius: 8px;
  color: var(--color-muted);
  font-size: 18px;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.invite-modal-close:hover {
  border-color: var(--color-gold);
  color: var(--color-gold);
  background: rgba(200, 164, 100, 0.1);
}

.invite-modal-body {
  padding: 32px 24px 24px;
}

.invite-modal-title {
  font-family: var(--font-cn-title);
  font-size: 22px;
  color: var(--color-text);
  margin-bottom: 8px;
  font-weight: 600;
}

.invite-modal-desc {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 24px;
  line-height: 1.6;
}

.invite-input-group {
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
}

.invite-input {
  flex: 1;
  height: 48px;
  padding: 0 16px;
  background: rgba(42, 42, 35, 0.8);
  border: 1px solid rgba(200, 164, 100, 0.3);
  border-radius: 10px;
  color: var(--color-text);
  font-size: 15px;
  font-family: var(--font-cn-body);
  letter-spacing: 1px;
  outline: none;
  transition: all 0.2s;
}

.invite-input:focus {
  border-color: var(--color-gold);
  box-shadow: 0 0 0 3px rgba(200, 164, 100, 0.15);
}

.invite-input::placeholder {
  color: var(--color-muted);
  opacity: 0.6;
}

.invite-input.error {
  border-color: #e74c3c;
  box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.15);
}

.invite-input.success {
  border-color: #2ecc71;
  box-shadow: 0 0 0 3px rgba(46, 204, 113, 0.15);
}

.btn-invite-verify {
  height: 48px;
  padding: 0 24px;
  background: var(--color-gold);
  border: none;
  border-radius: 10px;
  color: var(--color-dark);
  font-size: 15px;
  font-weight: 600;
  font-family: var(--font-cn-body);
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.btn-invite-verify:hover {
  background: #d4b878;
  transform: translateY(-1px);
}

.btn-invite-verify:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-invite-verify.loading {
  opacity: 0.8;
  pointer-events: none;
}

.invite-feedback {
  font-size: 14px;
  color: var(--color-muted);
  padding: 4px 0;
  min-height: 20px;
  line-height: 1.5;
}

.invite-feedback.error {
  color: #e74c3c;
}

.invite-feedback.success {
  color: #2ecc71;
}

.invite-success {
  text-align: center;
  padding: 24px 0;
  animation: inviteSuccessIn 0.5s ease-out;
}

@keyframes inviteSuccessIn {
  from { opacity: 0; transform: scale(0.9); }
  to { opacity: 1; transform: scale(1); }
}

.invite-success-icon {
  width: 56px;
  height: 56px;
  background: rgba(46, 204, 113, 0.15);
  border: 2px solid #2ecc71;
  border-radius: 50%;
  color: #2ecc71;
  font-size: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}

.invite-success-title {
  font-family: var(--font-cn-title);
  font-size: 20px;
  color: var(--color-text);
  margin-bottom: 8px;
}

.invite-success-tier {
  font-size: 16px;
  color: var(--color-gold);
  font-weight: 600;
  margin-bottom: 4px;
}

.invite-success-tier .tier-badge-inline {
  display: inline-block;
  padding: 2px 12px;
  border-radius: 6px;
  font-size: 14px;
  margin-left: 4px;
}

.tier-badge-inline.houting { background: rgba(138, 132, 120, 0.3); color: var(--color-muted); border: 1px solid var(--color-muted); }
.tier-badge-inline.donger { background: rgba(74, 108, 140, 0.3); color: var(--color-blue); border: 1px solid var(--color-blue); }
.tier-badge-inline.yueyuan { background: rgba(200, 164, 100, 0.3); color: var(--color-gold); border: 1px solid var(--color-gold); }
.tier-badge-inline.dingqian { background: rgba(200, 164, 100, 0.5); color: var(--color-gold); border: 1px solid var(--color-gold); }

.invite-success-desc {
  font-size: 13px;
  color: var(--color-muted);
  margin-bottom: 20px;
}

.invite-success-link {
  display: inline-block;
  padding: 10px 28px;
}

.invite-modal-footer {
  text-align: center;
  padding: 16px 24px;
  border-top: 1px solid rgba(200, 164, 100, 0.1);
}

.invite-modal-footer p {
  font-size: 13px;
  color: var(--color-muted);
}

.invite-modal-contact-link {
  color: var(--color-gold);
  text-decoration: none;
  transition: color 0.2s;
}

.invite-modal-contact-link:hover {
  color: #d4b878;
  text-decoration: underline;
}

/* Nav Actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-invite-login {
  padding: 8px 16px;
  background: transparent;
  border: 1px solid var(--color-gold);
  border-radius: 8px;
  color: var(--color-gold);
  font-size: 13px;
  font-family: var(--font-cn-body);
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.btn-invite-login:hover {
  background: rgba(200, 164, 100, 0.1);
}

.nav-user-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: rgba(200, 164, 100, 0.15);
  border: 1px solid rgba(200, 164, 100, 0.3);
  border-radius: 8px;
}

.nav-tier-icon {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-gold);
}

.nav-tier-name {
  font-size: 13px;
  color: var(--color-gold);
  font-family: var(--font-cn-body);
}

.nav-logout-btn {
  width: 20px;
  height: 20px;
  background: transparent;
  border: none;
  color: var(--color-muted);
  font-size: 14px;
  cursor: pointer;
  transition: color 0.2s;
  margin-left: 4px;
}

.nav-logout-btn:hover {
  color: #e74c3c;
}

/* Responsive: invite modal */
@media (max-width: 768px) {
  .invite-modal-card {
    max-width: 95vw;
    border-radius: 12px;
  }

  .invite-input-group {
    flex-direction: column;
  }

  .btn-invite-verify {
    width: 100%;
  }

  /* Mobile: show login button inline next to toggle */
  .nav-actions {
    gap: 8px;
  }

  .btn-invite-login {
    padding: 6px 12px;
    font-size: 12px;
  }

  .nav-user-badge {
    padding: 4px 8px;
    font-size: 11px;
    gap: 4px;
  }

  .nav-tier-icon {
    font-size: 12px;
  }

  .nav-tier-name {
    font-size: 11px;
  }
}