/* ===== 墨寻 - 全局样式 清新现代风格 ===== */
:root {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-soft: #f1f5f9;
  --bg-gradient-start: #f0f7ff;
  --bg-gradient-mid: #f8fafc;
  --bg-gradient-end: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #94a3b8;
  --border-light: #e2e8f0;
  --border-medium: #cbd5e1;
  --border-strong: #94a3b8;
  --accent-primary: #3b82f6;
  --accent-secondary: #6366f1;
  --accent-tertiary: #06b6d4;
  --accent-hover: #2563eb;
  --accent-light: #eff6ff;
  --accent-lighter: #f0f7ff;
  --accent-border: #bfdbfe;
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.1);
  --shadow-hover: 0 8px 24px rgba(59, 130, 246, 0.12);
  --shadow-btn: 0 2px 8px rgba(59, 130, 246, 0.25);
  --shadow-btn-hover: 0 6px 18px rgba(59, 130, 246, 0.35);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --radius-xs: 6px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-standard: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-emphasized: cubic-bezier(0.2, 0, 0, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, "Noto Sans CJK SC", sans-serif;
  font-size: 16px;
  background-color: var(--bg-gradient-end);
  background-image: linear-gradient(180deg, var(--bg-gradient-start) 0%, var(--bg-gradient-mid) 40%, var(--bg-gradient-end) 100%);
  background-attachment: fixed;
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
  line-height: 1.6;
}

/* 背景装饰 - 柔和光晕（用伪元素实现，不依赖外部图片） */
body::before,
body::after {
  content: '';
  position: fixed;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  opacity: 0.5;
  z-index: 0;
  pointer-events: none;
  will-change: transform;
}

body::before {
  top: -180px;
  left: -180px;
  background: radial-gradient(circle at center, #dbeafe 0%, rgba(219, 234, 254, 0) 70%);
  animation: floatOrb 28s ease-in-out infinite;
}

body::after {
  bottom: -180px;
  right: -180px;
  background: radial-gradient(circle at center, #ede9fe 0%, rgba(237, 233, 254, 0) 70%);
  animation: floatOrb 32s ease-in-out -14s infinite;
}

@keyframes floatOrb {
  0%, 100% {
    transform: translate(0, 0) scale(1);
  }
  33% {
    transform: translate(40px, 25px) scale(1.08);
  }
  66% {
    transform: translate(-30px, 35px) scale(0.96);
  }
}

.bg-orb-3 {
  position: fixed;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  opacity: 0.35;
  z-index: 0;
  pointer-events: none;
  top: 55%;
  left: 62%;
  background: radial-gradient(circle at center, #cffafe 0%, rgba(207, 250, 254, 0) 70%);
  animation: floatOrb 36s ease-in-out -8s infinite;
  will-change: transform;
}

/* 所有内容容器 */
.page-wrapper {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  opacity: 0;
  animation: pageFadeIn 0.6s var(--ease-out) forwards;
}

@keyframes pageFadeIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 14px 0;
  background-color: rgba(255, 255, 255, 0.78);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: padding 0.35s var(--ease-out),
              background-color 0.35s var(--ease-out),
              border-color 0.35s var(--ease-out),
              box-shadow 0.35s var(--ease-out);
  will-change: padding, background-color, box-shadow;
}

.navbar.scrolled {
  padding: 10px 0;
  background-color: rgba(255, 255, 255, 0.92);
  border-bottom-color: var(--border-light);
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  text-decoration: none;
  color: var(--text-primary);
  transition: opacity 0.2s var(--ease-standard);
}

.nav-logo:hover {
  opacity: 0.75;
}

.nav-logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background-image: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.nav-logo-text {
  background-image: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
}

.nav-links a {
  display: block;
  padding: 8px 16px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: color 0.2s var(--ease-standard),
              background-color 0.2s var(--ease-standard);
  position: relative;
}

.nav-links a:hover {
  color: var(--text-primary);
  background-color: var(--bg-soft);
}

.nav-links a.active {
  color: var(--accent-primary);
  background-color: var(--accent-light);
}

.nav-cta {
  padding: 9px 20px !important;
  background-image: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%) !important;
  color: #ffffff !important;
  font-weight: 600 !important;
  border-radius: var(--radius-sm) !important;
  margin-left: 8px;
  box-shadow: var(--shadow-btn);
  transition: transform 0.25s var(--ease-out),
              box-shadow 0.25s var(--ease-out),
              filter 0.25s var(--ease-out) !important;
}

.nav-cta:hover {
  transform: translateY(-1px) !important;
  box-shadow: var(--shadow-btn-hover) !important;
  filter: brightness(1.05);
  background-image: none !important;
  background-color: var(--accent-hover) !important;
  opacity: 1 !important;
}

.nav-cta:active {
  transform: translateY(0) !important;
  filter: brightness(0.98);
}

/* 汉堡菜单 */
.nav-hamburger {
  display: none;
  width: 40px;
  height: 40px;
  background-color: var(--bg-soft);
  border: 1px solid var(--border-light);
  border-radius: 10px;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 0;
  transition: background-color 0.2s var(--ease-standard),
              border-color 0.2s var(--ease-standard);
}

.nav-hamburger:hover {
  background-color: var(--accent-light);
  border-color: var(--accent-border);
}

.nav-hamburger span {
  display: block;
  width: 18px;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.25s var(--ease-out),
              opacity 0.2s var(--ease-standard);
  transform-origin: center;
}

.nav-hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-hamburger.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0.2);
}

.nav-hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 68px;
  left: 16px;
  right: 16px;
  background-color: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 10px;
  z-index: 99;
  transform: translateY(-12px);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.3s var(--ease-out),
              opacity 0.25s var(--ease-out);
  box-shadow: var(--shadow-lg);
}

.mobile-menu.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.mobile-menu a {
  display: block;
  padding: 12px 14px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 15px;
  border-radius: var(--radius-sm);
  transition: background-color 0.15s var(--ease-standard),
              color 0.15s var(--ease-standard);
}

.mobile-menu a:hover {
  color: var(--text-primary);
  background-color: var(--bg-soft);
}

.mobile-menu a.active {
  color: var(--accent-primary);
  background-color: var(--accent-light);
}

.mobile-menu .mobile-cta {
  margin-top: 6px;
  text-align: center;
  background-image: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  color: #ffffff !important;
  font-weight: 600;
}

.mobile-menu .mobile-cta:hover {
  background-image: linear-gradient(135deg, var(--accent-hover) 0%, var(--accent-secondary) 100%);
}

/* ===== 通用容器 ===== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
}

.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background-color: var(--accent-light);
  border: 1px solid var(--accent-border);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent-primary);
  margin-bottom: 16px;
}

.section-title {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 14px;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.65;
}

/* ===== 卡片 ===== */
.glass-card {
  background-color: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.25s var(--ease-out),
              border-color 0.25s var(--ease-out),
              transform 0.25s var(--ease-out);
}

.glass-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--accent-border);
  transform: translateY(-2px);
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.2s var(--ease-out),
              background-color 0.2s var(--ease-standard),
              border-color 0.2s var(--ease-standard),
              color 0.2s var(--ease-standard),
              box-shadow 0.25s var(--ease-out);
  font-family: inherit;
  line-height: 1.4;
  white-space: nowrap;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.btn:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

.btn-primary {
  background-image: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  color: #ffffff;
  box-shadow: var(--shadow-btn);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-btn-hover);
  filter: brightness(1.04);
}

.btn-primary:active {
  transform: translateY(0);
  filter: brightness(0.97);
  box-shadow: var(--shadow-btn);
}

.btn-secondary {
  background-color: #ffffff;
  color: var(--text-primary);
  border-color: var(--border-medium);
}

.btn-secondary:hover {
  background-color: var(--bg-soft);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.btn-secondary:active {
  background-color: var(--accent-light);
}

.btn-ghost {
  background-color: transparent;
  color: var(--text-secondary);
  border-color: var(--border-light);
}

.btn-ghost:hover {
  background-color: var(--bg-soft);
  color: var(--text-primary);
  border-color: var(--border-medium);
}

.btn-lg {
  padding: 15px 36px;
  font-size: 16px;
  border-radius: 12px;
}

/* ===== 页脚 ===== */
.footer {
  margin-top: auto;
  padding: 56px 0 28px;
  border-top: 1px solid var(--border-light);
  background-color: #ffffff;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 36px;
}

.footer-brand p {
  color: var(--text-secondary);
  margin-top: 12px;
  font-size: 14px;
  max-width: 300px;
  line-height: 1.65;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 14px;
  color: var(--text-primary);
}

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

.footer-col li {
  margin-bottom: 8px;
}

.footer-col a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.15s var(--ease-standard);
}

.footer-col a:hover {
  color: var(--accent-primary);
}

.footer-bottom {
  padding-top: 20px;
  border-top: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-tertiary);
  font-size: 13px;
}

.footer-contact {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background-color: var(--bg-soft);
  border: 1px solid var(--border-light);
  border-radius: 100px;
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 12px;
}

/* ===== 页面标题区 ===== */
.page-hero {
  padding: 140px 0 70px;
  text-align: center;
}

.page-hero h1 {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  opacity: 0;
  animation: heroFadeUp 0.7s var(--ease-out) 0.05s forwards;
}

.page-hero p {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  opacity: 0;
  animation: heroFadeUp 0.7s var(--ease-out) 0.15s forwards;
  line-height: 1.65;
}

@keyframes heroFadeUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== 滚动进入动画 ===== */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--ease-out),
              transform 0.6s var(--ease-out);
  will-change: opacity, transform;
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .footer-content {
    grid-template-columns: 1fr 1fr;
  }
}

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

  .nav-hamburger {
    display: flex;
  }

  .mobile-menu {
    display: block;
  }

  .nav-container {
    padding: 0 20px;
  }

  .container {
    padding: 0 20px;
  }

  .section {
    padding: 56px 0;
  }

  .section-title {
    font-size: 28px;
    letter-spacing: -0.01em;
  }

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

  .page-hero {
    padding: 110px 0 44px;
  }

  .page-hero h1 {
    font-size: 34px;
  }

  .page-hero p {
    font-size: 15px;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 10px;
    text-align: center;
  }

  .btn-lg {
    padding: 13px 26px;
    font-size: 15px;
  }

  body::before,
  body::after {
    width: 300px;
    height: 300px;
  }

  .bg-orb-3 {
    width: 240px;
    height: 240px;
  }
}

/* ===== 可访问性 - 减少动效偏好 ===== */
@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;
  }
}

/* ===== 选中文字样式 ===== */
::selection {
  background-color: rgba(59, 130, 246, 0.2);
  color: var(--text-primary);
}