/* ========================================
   BBpay 波币钱包 — 共享设计系统
   ======================================== */

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

:root {
  /* 品牌色 — 与APP一致的蓝色体系 */
  --primary: #3a78ff;
  --primary-light: #3b82f6;
  --primary-lighter: #60a5fa;
  --primary-dark: #1d4ed8;
  --primary-bg: #eff6ff;
  --primary-bg-subtle: #f0f7ff;

  /* 中性色 */
  --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;

  /* 语义色 */
  --success: #22c55e;
  --success-bg: #f0fdf4;
  --warning: #f59e0b;
  --warning-bg: #fffbeb;
  --error: #ef4444;
  --error-bg: #fef2f2;
  --info: #3b82f6;
  --info-bg: #eff6ff;
  --purple: #8b5cf6;
  --purple-bg: #f5f3ff;
  --teal: #14b8a6;
  --teal-bg: #f0fdfa;
  --amber: #f59e0b;
  --amber-bg: #fffbeb;

  /* 背景 */
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-tertiary: #f3f4f6;

  /* 文字 */
  --text-primary: #111827;
  --text-secondary: #4b5563;
  --text-tertiary: #6b7280;
  --text-muted: #9ca3af;

  /* 字体 */
  --font-cn:
    "Noto Sans SC", -apple-system, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", sans-serif;
  --font-en: "Outfit", -apple-system, BlinkMacSystemFont, sans-serif;

  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* 阴影 */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
  --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, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --shadow-blue: 0 4px 14px rgba(37, 99, 235, 0.25);
  --shadow-blue-lg: 0 8px 24px rgba(37, 99, 235, 0.3);

  /* 过渡 */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-cn);
  color: var(--text-primary);
  background: var(--bg-primary);
  overflow-x: hidden;
  line-height: 1.6;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  text-decoration: none;
  color: inherit;
  transition: color 0.2s;
}
button {
  font-family: var(--font-cn);
  border: none;
  cursor: pointer;
  background: none;
}
ul {
  list-style: none;
}

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

/* ===== 子页 Hero 氛围层（与首页 index / home.css 一致）===== */
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}
.hero-blur-circle {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.6;
  animation: hero-drift-slow 20s ease-in-out infinite alternate;
}
.hero-bg .hb-1 {
  width: 600px;
  height: 600px;
  background: #e0e7ff;
  top: -200px;
  left: -100px;
}
.hero-bg .hb-2 {
  width: 800px;
  height: 800px;
  background: #dbeafe;
  bottom: -300px;
  right: -200px;
  animation-delay: -5s;
}
.hero-bg .hb-3 {
  width: 500px;
  height: 500px;
  background: #f3e8ff;
  top: 30%;
  left: 50%;
  margin-left: -250px;
  animation-delay: -10s;
}
.hero-noise {
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
  opacity: 0.04;
  mix-blend-mode: overlay;
  pointer-events: none;
}

@keyframes hero-drift-slow {
  0% {
    transform: translate(0, 0) scale(1);
  }
  50% {
    transform: translate(30px, 40px) scale(1.1);
  }
  100% {
    transform: translate(-20px, 20px) scale(0.95);
  }
}

/* ===== 按钮 ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--primary);
  color: white;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  transition: all 0.3s var(--ease-out);
  box-shadow:
    0 8px 24px rgba(37, 99, 235, 0.28),
    inset 0 1px 0 rgba(255, 255, 255, 0.22);
  white-space: nowrap;
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow:
    0 12px 32px rgba(37, 99, 235, 0.35),
    inset 0 1px 0 rgba(255, 255, 255, 0.28);
  color: white;
}
.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--bg-primary);
  color: var(--text-primary);
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow:
    0 4px 16px rgba(15, 23, 42, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.95);
  transition: all 0.3s var(--ease-out);
  white-space: nowrap;
}
.btn-secondary:hover {
  border-color: var(--primary-lighter);
  color: var(--primary);
  background: var(--primary-bg);
  transform: translateY(-1px);
  box-shadow:
    0 8px 22px rgba(37, 99, 235, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 1);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: rgba(255, 255, 255, 0.8);
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 500;
  transition: color 0.2s;
  white-space: nowrap;
}
.btn-ghost:hover {
  color: white;
}

.btn-lg {
  padding: 14px 32px;
  font-size: 16px;
  border-radius: var(--radius-lg);
}

/* ===== Section通用样式 ===== */
.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  /* color: var(--primary); */
  /* background: var(--primary-bg); */
  background-color: #444444;
  color: white;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.section-title {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-tertiary, "#6B7280");
  max-width: 520px;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}
.section-header .section-desc {
  margin: 0 auto;
}

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  transition:
    background 0.3s,
    box-shadow 0.3s;
}
.header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-sm);
}

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

.header-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  flex-shrink: 0;
}
.logo-img-new {
  width: 120px;
}

.logo-icon {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}
.logo-icon svg {
  width: 36px;
  height: 36px;
}
.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.logo-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}
.logo-sub {
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}
.nav-link:hover {
  color: var(--primary);
  background: var(--primary-bg);
}
.nav-link.active {
  color: var(--primary);
  font-weight: 600;
}
.nav-cta {
  background: linear-gradient(
    180deg,
    #5a9cff 0%,
    #3a78ff 50%,
    #2d62e0 100%
  ) !important;
  color: white !important;
  padding: 8px 20px !important;
  border-radius: 8px !important;
  margin-left: 8px;
  font-weight: 600 !important;
  box-shadow: 0 2px 8px rgba(58, 120, 255, 0.25) !important;
  transition: all 0.2s ease !important;
}
.nav-cta:hover {
  background: linear-gradient(
    180deg,
    #6aabff 0%,
    #4488ff 50%,
    #3570f0 100%
  ) !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(58, 120, 255, 0.35) !important;
}

/* 汉堡菜单 */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}
.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s;
}
.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}
.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* 移动端菜单 */
.mobile-menu {
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  z-index: 999;
  display: none;
  opacity: 0;
  transition: opacity 0.3s;
}
.mobile-menu.active {
  display: block;
  opacity: 1;
}
.mobile-nav {
  display: flex;
  flex-direction: column;
  padding: 24px;
  gap: 4px;
}
.mobile-nav-link {
  font-size: 17px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 14px 16px;
  border-radius: var(--radius-md);
  transition: all 0.2s;
  text-align: center;
}
.mobile-nav-link:hover,
.mobile-nav-link.active {
  color: var(--primary);
  background: var(--primary-bg);
}
.mobile-nav-link.highlight {
  color: white;
  text-align: center;
  font-weight: 600;
  margin-top: 12px;
  background: linear-gradient(
    180deg,
    #5a9cff 0%,
    #3a78ff 50%,
    #2d62e0 100%
  ) !important;
  text-align: center;
  border-radius: 12px !important;
  box-shadow: 0 2px 8px rgba(58, 120, 255, 0.25) !important;
  transition: all 0.2s ease !important;
}

/* ===== Footer ===== */
.footer {
  background: var(--gray-900);
  color: white;
  padding: 64px 0 32px;
}
.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand {
  max-width: 280px;
}

.footer-logo-new {
  width: 120px;
  margin-bottom: 16px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-logo .logo-img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.footer-logo .logo-name {
  color: white;
}
.footer-logo .logo-sub {
  color: rgba(255, 255, 255, 0.5);
}
.footer-tagline {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.6;
}
.footer-links {
  display: flex;
  gap: 64px;
}
.footer-col h4 {
  font-size: 13px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.4);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 20px;
}
.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-col li a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  transition: color 0.2s;
}
.footer-col li a:hover {
  color: white;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
}
.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.35);
  text-align: center;
}

/* ===== 悬浮按钮 ===== */
.float-actions {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 900;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.float-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  transition: all 0.3s var(--ease-out);
  cursor: pointer;
}
.float-btn:hover {
  transform: scale(1.1) translateY(-2px);
  box-shadow: var(--shadow-xl);
}
.float-telegram {
  background: #229ed9;
  color: white;
  position: relative;
}

.telegram-popover {
  position: absolute;
  right: 64px;
  bottom: -10px;
  width: 260px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: var(--radius-xl);
  padding: 20px;
  color: var(--text-primary);
  opacity: 0;
  visibility: hidden;
  transform: translateX(10px) scale(0.95);
  transform-origin: right bottom;
  transition: all 0.3s var(--ease-spring);
  box-shadow:
    0 12px 32px rgba(15, 23, 42, 0.1),
    0 4px 12px rgba(15, 23, 42, 0.05);
  cursor: default;
  pointer-events: none;
}

.float-telegram:hover .telegram-popover {
  opacity: 1;
  visibility: visible;
  transform: translateX(0) scale(1);
  pointer-events: auto;
}

.telegram-popover::after {
  content: "";
  position: absolute;
  right: -6px;
  bottom: 24px;
  border-left: 6px solid rgba(255, 255, 255, 0.95);
  border-top: 6px solid transparent;
  border-bottom: 6px solid transparent;
  filter: drop-shadow(2px 0 2px rgba(0, 0, 0, 0.05));
}

.tp-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-tertiary);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.tp-contact {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-secondary);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  border: 1px solid rgba(0, 0, 0, 0.03);
}

.tp-contact-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.tp-label {
  font-size: 12px;
  color: var(--text-tertiary);
}

.tp-contact a {
  color: #229ed9;
  font-size: 16px;
  font-weight: 700;
  text-decoration: none;
  transition: color 0.2s;
}

.tp-contact a:hover {
  color: #1a82b8;
}

.tp-copy {
  color: var(--text-tertiary);
  background: white;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
  border: 1px solid rgba(0, 0, 0, 0.05);
  transition: all 0.2s;
}

.tp-copy:hover {
  color: var(--text-primary);
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.08);
}

.tp-copy:active {
  transform: translateY(0);
}

.tp-warning {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 12px;
  color: #dc2626;
  background: #fef2f2;
  padding: 8px;
  border-radius: var(--radius-sm);
  font-weight: 600;
}
.float-service {
  background: var(--primary);
  color: white;
  position: relative;
}
.service-label {
  position: absolute;
  right: 56px;
  white-space: nowrap;
  background: var(--gray-800);
  color: white;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 500;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}
.float-service:hover .service-label {
  opacity: 1;
}

/* ===== 动画 ===== */
.anim-fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity 0.7s var(--ease-out),
    transform 0.7s var(--ease-out);
}
.anim-fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}
.delay-1 {
  transition-delay: 0.1s;
}
.delay-2 {
  transition-delay: 0.2s;
}
.delay-3 {
  transition-delay: 0.3s;
}
.delay-4 {
  transition-delay: 0.4s;
}

@media (prefers-reduced-motion: reduce) {
  .anim-fade-up {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .hero-blur-circle {
    animation: none;
  }
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .header-nav {
    display: none;
  }
  .menu-toggle {
    display: flex;
  }

  .section-title {
    font-size: 26px;
  }
  .section-desc {
    font-size: 15px;
  }

  .footer-top {
    flex-direction: column;
    gap: 32px;
  }
  .footer-links {
    gap: 32px;
  }
  .footer-brand {
    max-width: 100%;
  }

  .float-actions {
    bottom: 96px; /* 避开底部固定的下载栏 */
    right: 16px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  .section-title {
    font-size: 24px;
  }
  .footer-links {
    flex-wrap: wrap;
    gap: 24px;
  }
  .footer-col {
    min-width: 100px;
  }
}