/* ============================================
   雪赞 XUEZAN 品牌官网 - 全站样式
   自然治愈 · 明亮干净 · 松弛简约 · 轻量科技
   ============================================ */

:root {
  /* 品牌主色系 */
  --brand-blue: #4788D8;
  --brand-blue-light: #6BA3E5;
  --brand-blue-dark: #3A6FB8;
  --fog-blue: #E8F1FB;
  --fog-blue-light: #F4F8FD;
  --mist-blue: #EDF4FB;

  /* 自然点缀 */
  --sage-green: #B8D4C2;
  --warm-cream: #FAF8F5;

  /* 文本色 */
  --text-primary: #1F2937;
  --text-secondary: #6B7280;
  --text-tertiary: #9CA3AF;
  --text-on-blue: #FFFFFF;

  /* 背景 */
  --bg-primary: #FFFFFF;
  --bg-secondary: #FAFBFD;
  --bg-soft: #F7F9FC;

  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(71, 136, 216, 0.06);
  --shadow-md: 0 4px 20px rgba(71, 136, 216, 0.08);
  --shadow-lg: 0 8px 32px rgba(71, 136, 216, 0.10);

  /* 圆角 */
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  /* 间距 */
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 40px;
  --space-xl: 64px;
  --space-xxl: 120px;

  /* 字体 */
  --font-sans: 'Inter', 'PingFang SC', 'Source Han Sans CN', 'Microsoft YaHei', sans-serif;
  --font-display: 'Inter', 'PingFang SC', sans-serif;

  /* 过渡 */
  --transition-slow: 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-base: 0.3s ease-out;
}

/* ============================================
   全局重置与基础
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  line-height: 1.7;
  font-weight: 400;
  font-size: 16px;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: var(--brand-blue);
  text-decoration: none;
  transition: color var(--transition-base);
}

a:hover {
  color: var(--brand-blue-dark);
}

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

/* ============================================
   排版
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.3;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 400;
  margin-bottom: var(--space-md);
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  font-weight: 500;
  margin-bottom: var(--space-sm);
}

p {
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
  font-weight: 400;
}

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

.text-small {
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

/* ============================================
   通用容器
   ============================================ */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}

.container-narrow {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 32px;
}

.container-wide {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 32px;
}

.section {
  padding: var(--space-xxl) 0;
  position: relative;
}

.section-sm {
  padding: var(--space-xl) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.section-title .label {
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 0.3em;
  color: var(--brand-blue);
  text-transform: uppercase;
  margin-bottom: var(--space-md);
  font-weight: 500;
}

.section-title h2 {
  max-width: 720px;
  margin: 0 auto;
}

.section-title p {
  max-width: 600px;
  margin: var(--space-sm) auto 0;
  color: var(--text-secondary);
}

/* ============================================
   导航栏 / Header
   ============================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(71, 136, 216, 0.06);
  transition: all var(--transition-base);
}

.site-header.scrolled {
  box-shadow: var(--shadow-sm);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 32px;
  max-width: 1400px;
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
}

.brand-logo {
  height: 36px;
  width: auto;
  object-fit: contain;
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.brand-text .name-cn {
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.05em;
}

.brand-text .name-en {
  font-size: 10px;
  color: var(--text-secondary);
  letter-spacing: 0.2em;
  margin-top: 4px;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 48px;
  list-style: none;
}

.nav-links a {
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 400;
  position: relative;
  padding: 6px 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--brand-blue);
  transition: width var(--transition-base);
}

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

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

.nav-cta {
  font-size: 13px;
  color: var(--brand-blue);
  padding: 8px 20px;
  border: 1px solid rgba(71, 136, 216, 0.2);
  border-radius: 20px;
  transition: all var(--transition-base);
}

.nav-cta:hover {
  background: var(--brand-blue);
  color: white;
  border-color: var(--brand-blue);
}

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

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text-primary);
  transition: all var(--transition-base);
}

/* ============================================
   按钮
   ============================================ */
.btn {
  display: inline-block;
  padding: 16px 36px;
  font-size: 15px;
  font-weight: 400;
  border-radius: 28px;
  text-align: center;
  transition: all var(--transition-base);
  letter-spacing: 0.02em;
  cursor: pointer;
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--brand-blue);
  color: white;
}

.btn-primary:hover {
  background: var(--brand-blue-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  color: white;
}

.btn-ghost {
  background: transparent;
  color: var(--brand-blue);
  border: 1px solid rgba(71, 136, 216, 0.3);
}

.btn-ghost:hover {
  background: var(--fog-blue);
  border-color: var(--brand-blue);
  color: var(--brand-blue);
}

/* ============================================
   首页主视觉 / Hero
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 140px 0 80px;
  background:
    radial-gradient(ellipse at top right, var(--fog-blue-light) 0%, transparent 50%),
    radial-gradient(ellipse at bottom left, var(--fog-blue) 0%, transparent 50%),
    linear-gradient(180deg, #FFFFFF 0%, #FAFBFD 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 15% 20%, rgba(184, 212, 194, 0.3) 0%, transparent 30%),
    radial-gradient(circle at 85% 80%, rgba(232, 241, 251, 0.4) 0%, transparent 35%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.hero-content .hero-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: 0.15em;
  color: var(--brand-blue);
  text-transform: uppercase;
  margin-bottom: var(--space-md);
  padding: 8px 16px;
  background: rgba(71, 136, 216, 0.06);
  border-radius: 24px;
  font-weight: 500;
}

.hero-content .hero-label::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand-blue);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.85); }
}

.hero h1 {
  margin-bottom: var(--space-md);
}

.hero h1 .accent {
  color: var(--brand-blue);
  font-weight: 400;
}

.hero-lead {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 60px;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: 40px;
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(71, 136, 216, 0.1);
}

.hero-stats .stat .num {
  font-size: 1.75rem;
  font-weight: 300;
  color: var(--brand-blue);
  display: block;
  line-height: 1;
  margin-bottom: 8px;
  font-family: var(--font-display);
}

.hero-stats .stat .label {
  font-size: 13px;
  color: var(--text-tertiary);
  letter-spacing: 0.05em;
}

.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 540px;
}

.hero-ring-scene {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ring-visual {
  position: relative;
  width: 380px;
  height: 380px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ring-bg-glow {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle, rgba(71, 136, 216, 0.15) 0%, transparent 60%);
  filter: blur(40px);
  animation: glowFloat 6s ease-in-out infinite;
}

@keyframes glowFloat {
  0%, 100% { transform: scale(1); opacity: 0.8; }
  50% { transform: scale(1.1); opacity: 1; }
}

.ring-orbit {
  position: absolute;
  inset: 0;
  border: 1px dashed rgba(71, 136, 216, 0.15);
  border-radius: 50%;
  animation: rotate 60s linear infinite;
}

.ring-orbit.inner {
  inset: 60px;
  animation-duration: 40s;
  animation-direction: reverse;
  border-color: rgba(71, 136, 216, 0.1);
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.ring-product-svg {
  position: relative;
  z-index: 2;
  width: 280px;
  height: 280px;
}

.floating-particle {
  position: absolute;
  background: var(--brand-blue);
  border-radius: 50%;
  opacity: 0.4;
}

.floating-particle.p1 {
  width: 8px; height: 8px;
  top: 15%; left: 20%;
  animation: floatP1 8s ease-in-out infinite;
}

.floating-particle.p2 {
  width: 6px; height: 6px;
  top: 70%; right: 15%;
  background: var(--sage-green);
  animation: floatP2 10s ease-in-out infinite;
}

.floating-particle.p3 {
  width: 4px; height: 4px;
  bottom: 25%; left: 35%;
  animation: floatP1 7s ease-in-out infinite;
}

@keyframes floatP1 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(20px, -15px); }
}

@keyframes floatP2 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(-25px, 20px); }
}

.music-note {
  position: absolute;
  color: var(--brand-blue);
  opacity: 0.25;
  font-size: 24px;
  animation: floatNote 5s ease-in-out infinite;
}

.music-note.n1 { top: 10%; right: 10%; animation-delay: 0s; }
.music-note.n2 { bottom: 15%; left: 5%; animation-delay: 1.5s; }
.music-note.n3 { top: 50%; right: 5%; animation-delay: 3s; }

@keyframes floatNote {
  0%, 100% { transform: translate(0, 0) rotate(-5deg); opacity: 0.25; }
  50% { transform: translate(0, -20px) rotate(5deg); opacity: 0.5; }
}

/* ============================================
   通用 section 内 bg 装饰
   ============================================ */
.section-light {
  background: var(--bg-secondary);
}

.section-blue {
  background: linear-gradient(180deg, var(--fog-blue-light) 0%, var(--fog-blue) 100%);
}

.section-warm {
  background: linear-gradient(180deg, var(--warm-cream) 0%, #FFF 100%);
}

/* ============================================
   品牌故事介绍区
   ============================================ */
.brand-story-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.story-content .label {
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 0.3em;
  color: var(--brand-blue);
  margin-bottom: var(--space-md);
  font-weight: 500;
}

.story-content h2 {
  font-size: 2.4rem;
  margin-bottom: var(--space-md);
  font-weight: 300;
}

.story-content p {
  font-size: 1.05rem;
  line-height: 1.9;
  margin-bottom: var(--space-md);
  color: var(--text-secondary);
}

.story-content .quote {
  font-size: 1.15rem;
  font-style: normal;
  color: var(--brand-blue);
  padding-left: 20px;
  border-left: 2px solid var(--brand-blue);
  margin: var(--space-lg) 0;
}

.story-visual {
  position: relative;
  height: 480px;
  border-radius: var(--radius-xl);
  background:
    radial-gradient(ellipse at center, var(--fog-blue-light) 0%, var(--fog-blue) 100%);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.story-visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 30% 30%, rgba(184, 212, 194, 0.4) 0%, transparent 40%),
    radial-gradient(circle at 70% 70%, rgba(232, 241, 251, 0.5) 0%, transparent 40%);
}

.story-visual-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 40px;
}

.story-visual-content svg {
  width: 200px;
  height: auto;
  margin: 0 auto;
  filter: drop-shadow(0 8px 24px rgba(71, 136, 216, 0.15));
}

/* ============================================
   核心功能区
   ============================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: var(--space-xl);
}

.feature-card {
  background: white;
  padding: 48px 36px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(71, 136, 216, 0.08);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(71, 136, 216, 0.2);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--fog-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  color: var(--brand-blue);
}

.feature-icon svg {
  width: 28px;
  height: 28px;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 0.95rem;
  line-height: 1.7;
  margin: 0;
}

/* ============================================
   产品场景区
   ============================================ */
.scenes-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: var(--space-xl);
}

.scene-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: white;
  border: 1px solid rgba(71, 136, 216, 0.06);
  transition: all var(--transition-base);
  cursor: pointer;
}

.scene-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.scene-visual {
  height: 200px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #E8F1FB 0%, #F4F8FD 100%);
  overflow: hidden;
}

.scene-visual.scene-sleep {
  background: linear-gradient(135deg, #DAE8F7 0%, #E8F1FB 100%);
}

.scene-visual.scene-work {
  background: linear-gradient(135deg, #F0EBE3 0%, #FAF6EE 100%);
}

.scene-visual.scene-sport {
  background: linear-gradient(135deg, #E8F1FB 0%, #D8E8F5 100%);
}

.scene-visual.scene-home {
  background: linear-gradient(135deg, #EFE9DC 0%, #F4F0E8 100%);
}

.scene-visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 30% 40%, rgba(255, 255, 255, 0.4) 0%, transparent 50%);
}

.scene-content {
  padding: 24px;
}

.scene-content h4 {
  font-size: 1.05rem;
  margin-bottom: 8px;
  font-weight: 500;
}

.scene-content p {
  font-size: 0.875rem;
  margin: 0;
  line-height: 1.6;
}

.scene-emoji {
  font-size: 60px;
  position: relative;
  z-index: 2;
  opacity: 0.7;
}

/* ============================================
   数字区 / 数据展示
   ============================================ */
.numbers-section {
  background: linear-gradient(135deg, #FFFFFF 0%, var(--fog-blue-light) 100%);
}

.numbers-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  margin-top: var(--space-xl);
}

.number-card {
  text-align: center;
  padding: 20px;
}

.number-card .num {
  font-size: 3rem;
  font-weight: 200;
  color: var(--brand-blue);
  font-family: var(--font-display);
  line-height: 1;
  margin-bottom: 12px;
}

.number-card .label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
}

/* ============================================
   品牌理念区
   ============================================ */
.philosophy {
  text-align: center;
  padding: var(--space-xxl) 0;
  background: linear-gradient(180deg, #FFFFFF 0%, var(--fog-blue-light) 100%);
}

.philosophy-quote {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 300;
  color: var(--text-primary);
  line-height: 1.5;
  margin-bottom: var(--space-md);
  letter-spacing: 0.02em;
}

.philosophy-quote .accent {
  color: var(--brand-blue);
  font-weight: 400;
}

.philosophy-author {
  color: var(--text-tertiary);
  font-size: 0.9rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

/* ============================================
   页脚 / Footer
   ============================================ */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid rgba(71, 136, 216, 0.08);
  padding: 80px 0 32px;
  margin-top: var(--space-xxl);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 60px;
  padding-bottom: 60px;
  border-bottom: 1px solid rgba(71, 136, 216, 0.08);
}

.footer-brand .brand {
  margin-bottom: 24px;
}

.footer-tagline {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 320px;
}

.footer-col h5 {
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  color: var(--text-tertiary);
  text-transform: uppercase;
  margin-bottom: 20px;
  font-weight: 500;
}

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

.footer-col li {
  margin-bottom: 12px;
}

.footer-col a {
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color var(--transition-base);
}

.footer-col a:hover {
  color: var(--brand-blue);
}

.footer-contact-item {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
  line-height: 1.5;
}

.footer-bottom {
  padding-top: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.compliance-info {
  text-align: center;
  font-size: 0.825rem;
  color: var(--text-tertiary);
  line-height: 1.8;
  max-width: 800px;
  margin: 0 auto;
}

.compliance-info .company-name {
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.compliance-info a {
  color: var(--text-secondary);
  text-decoration: underline;
  text-decoration-color: rgba(71, 136, 216, 0.3);
}

.compliance-info a:hover {
  color: var(--brand-blue);
}

.compliance-links {
  display: flex;
  gap: 32px;
  margin-top: 20px;
  flex-wrap: wrap;
  justify-content: center;
}

.compliance-links a {
  font-size: 0.825rem;
  color: var(--text-secondary);
}

.icp-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: 1px solid rgba(71, 136, 216, 0.15);
  border-radius: 16px;
  background: white;
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-base);
}

.icp-badge:hover {
  border-color: var(--brand-blue);
  color: var(--brand-blue);
}

.copyright {
  font-size: 0.8rem;
  color: var(--text-tertiary);
  text-align: center;
  margin-top: 12px;
}

/* ============================================
   品牌故事页
   ============================================ */
.page-header {
  padding: 160px 0 80px;
  background:
    radial-gradient(ellipse at top, var(--fog-blue-light) 0%, transparent 60%),
    linear-gradient(180deg, #FFFFFF 0%, #FAFBFD 100%);
  text-align: center;
}

.page-header .label {
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 0.3em;
  color: var(--brand-blue);
  text-transform: uppercase;
  margin-bottom: var(--space-md);
  font-weight: 500;
}

.page-header h1 {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  margin-bottom: var(--space-md);
  font-weight: 300;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.page-header .lead {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 620px;
  margin: 0 auto;
  line-height: 1.8;
}

.story-section {
  padding: var(--space-xl) 0;
}

.story-narrative {
  max-width: 760px;
  margin: 0 auto;
  font-size: 1.0625rem;
  line-height: 2;
  color: var(--text-primary);
}

.story-narrative p {
  margin-bottom: var(--space-md);
  color: var(--text-primary);
  font-size: 1.0625rem;
}

.story-narrative p.lead-text {
  font-size: 1.25rem;
  color: var(--brand-blue);
  font-weight: 300;
  line-height: 1.7;
  text-align: center;
  margin: var(--space-lg) auto;
  padding: var(--space-md) 0;
  border-top: 1px solid rgba(71, 136, 216, 0.15);
  border-bottom: 1px solid rgba(71, 136, 216, 0.15);
}

.story-narrative .highlight {
  color: var(--brand-blue);
  font-weight: 500;
}

.story-timeline {
  margin-top: var(--space-xl);
  position: relative;
  padding-left: 60px;
}

.story-timeline::before {
  content: '';
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--brand-blue) 20%, var(--brand-blue) 80%, transparent);
  opacity: 0.3;
}

.timeline-item {
  position: relative;
  padding-bottom: var(--space-xl);
}

.timeline-item:last-child { padding-bottom: 0; }

.timeline-item::before {
  content: '';
  position: absolute;
  left: -50px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--brand-blue);
  box-shadow: 0 0 0 6px var(--fog-blue-light);
}

.timeline-year {
  font-size: 0.85rem;
  color: var(--brand-blue);
  letter-spacing: 0.2em;
  margin-bottom: 8px;
  font-weight: 500;
}

.timeline-item h4 {
  font-size: 1.15rem;
  margin-bottom: 12px;
  font-weight: 500;
}

.timeline-item p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* ============================================
   产品详情页
   ============================================ */
.product-hero {
  padding: 160px 0 80px;
  background: linear-gradient(180deg, #FFFFFF 0%, var(--fog-blue-light) 100%);
}

.product-hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.product-visual {
  position: relative;
  height: 500px;
  background: radial-gradient(ellipse at center, white 0%, var(--fog-blue-light) 100%);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.product-visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 30% 30%, rgba(71, 136, 216, 0.08) 0%, transparent 40%);
}

.product-content h1 {
  font-size: clamp(2.2rem, 4vw, 3.4rem);
  margin-bottom: var(--space-md);
  font-weight: 300;
}

.product-content .lead {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-lg);
}

.product-tags {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: var(--space-lg);
}

.product-tag {
  padding: 6px 14px;
  background: var(--fog-blue-light);
  color: var(--brand-blue);
  border-radius: 20px;
  font-size: 0.825rem;
  font-weight: 500;
}

.product-specs {
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(71, 136, 216, 0.1);
}

.spec-row {
  display: flex;
  justify-content: space-between;
  padding: 14px 0;
  border-bottom: 1px solid rgba(71, 136, 216, 0.05);
}

.spec-row:last-child { border-bottom: none; }

.spec-row .label {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.spec-row .value {
  color: var(--text-primary);
  font-size: 0.95rem;
  font-weight: 500;
}

/* 核心功能详述 */
.feature-detail {
  margin-bottom: var(--space-xl);
  padding: 40px 0;
  border-bottom: 1px solid rgba(71, 136, 216, 0.08);
}

.feature-detail:last-child { border-bottom: none; }

.feature-detail-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.feature-detail.reverse .feature-detail-inner {
  grid-template-areas: "visual text";
}

.feature-detail.reverse .feature-text {
  grid-area: text;
}

.feature-detail.reverse .feature-visual {
  grid-area: visual;
}

.feature-detail .feature-text .label {
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 0.3em;
  color: var(--brand-blue);
  text-transform: uppercase;
  margin-bottom: var(--space-md);
  font-weight: 500;
}

.feature-detail h3 {
  font-size: 2rem;
  font-weight: 300;
  margin-bottom: var(--space-md);
}

.feature-detail p {
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.feature-detail .feature-list {
  list-style: none;
  margin-top: var(--space-md);
}

.feature-detail .feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 12px;
  color: var(--text-primary);
  font-size: 0.95rem;
}

.feature-detail .feature-list li::before {
  content: '';
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--brand-blue);
  margin-top: 8px;
}

.feature-visual {
  height: 380px;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--fog-blue-light) 0%, var(--fog-blue) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.feature-visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.5) 0%, transparent 50%);
}

/* 辅助功能区 */
.aux-features {
  background: var(--bg-secondary);
}

.aux-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: var(--space-xl);
}

.aux-card {
  background: white;
  padding: 32px 24px;
  border-radius: var(--radius-md);
  text-align: center;
  border: 1px solid rgba(71, 136, 216, 0.06);
}

.aux-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 20px;
  background: var(--fog-blue-light);
  border-radius: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-blue);
}

.aux-card h4 {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 8px;
}

.aux-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* ============================================
   关于公司页
   ============================================ */
.about-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.about-content h2 {
  font-size: 2.2rem;
  margin-bottom: var(--space-md);
  font-weight: 300;
}

.about-content p {
  font-size: 1.05rem;
  line-height: 1.9;
  margin-bottom: var(--space-md);
  color: var(--text-secondary);
}

.about-info {
  background: white;
  padding: 40px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(71, 136, 216, 0.08);
}

.about-info h3 {
  font-size: 1.1rem;
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid rgba(71, 136, 216, 0.1);
  color: var(--text-primary);
}

.info-list { list-style: none; }

.info-list li {
  display: flex;
  padding: 14px 0;
  border-bottom: 1px solid rgba(71, 136, 216, 0.05);
}

.info-list li:last-child { border-bottom: none; }

.info-list .info-label {
  flex: 0 0 100px;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.info-list .info-value {
  flex: 1;
  color: var(--text-primary);
  font-size: 0.95rem;
  line-height: 1.5;
}

.info-list .info-value a {
  color: var(--brand-blue);
  text-decoration: none;
}

.info-list .info-value a:hover {
  text-decoration: underline;
}

.contact-card {
  background: linear-gradient(135deg, var(--fog-blue-light) 0%, white 100%);
  padding: 40px;
  border-radius: var(--radius-lg);
  text-align: center;
  border: 1px solid rgba(71, 136, 216, 0.08);
  margin-top: var(--space-md);
}

.contact-card .label {
  font-size: 0.8rem;
  letter-spacing: 0.3em;
  color: var(--brand-blue);
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
  font-weight: 500;
}

.contact-card h3 {
  font-size: 1.6rem;
  font-weight: 300;
  margin-bottom: var(--space-md);
}

.contact-card p {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.contact-card .email {
  font-size: 1.4rem;
  color: var(--brand-blue);
  font-weight: 400;
  letter-spacing: 0.02em;
  text-decoration: none;
  display: inline-block;
  padding: 8px 0;
  border-bottom: 1px solid var(--brand-blue);
}

/* ============================================
   滚动动画
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in-stagger.visible > * {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-stagger.visible > *:nth-child(1) { transition-delay: 0s; }
.fade-in-stagger.visible > *:nth-child(2) { transition-delay: 0.1s; }
.fade-in-stagger.visible > *:nth-child(3) { transition-delay: 0.2s; }
.fade-in-stagger.visible > *:nth-child(4) { transition-delay: 0.3s; }
.fade-in-stagger.visible > *:nth-child(5) { transition-delay: 0.4s; }
.fade-in-stagger.visible > *:nth-child(6) { transition-delay: 0.5s; }

/* ============================================
   响应式
   ============================================ */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 60px;
  }

  .hero-visual {
    height: 400px;
  }

  .ring-visual {
    width: 320px;
    height: 320px;
  }

  .brand-story-intro,
  .product-hero-inner,
  .about-section,
  .feature-detail-inner {
    grid-template-columns: 1fr;
    gap: 60px;
  }

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

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}

@media (max-width: 720px) {
  :root {
    --space-xxl: 80px;
    --space-xl: 60px;
  }

  .container,
  .container-narrow,
  .container-wide {
    padding: 0 20px;
  }

  .nav-links {
    display: none;
  }

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

  .nav-container {
    padding: 16px 20px;
  }

  .hero {
    padding: 120px 0 60px;
    min-height: auto;
  }

  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-stats {
    gap: 24px;
    flex-wrap: wrap;
  }

  .hero-visual {
    height: 320px;
  }

  .ring-visual {
    width: 260px;
    height: 260px;
  }

  .ring-product-svg {
    width: 200px;
    height: 200px;
  }

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

  .numbers-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .number-card .num {
    font-size: 2.2rem;
  }

  .story-visual {
    height: 320px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    padding: 32px 20px 0;
  }

  .compliance-links {
    flex-direction: column;
    align-items: center;
    gap: 16px;
  }

  .section {
    padding: 80px 0;
  }

  .feature-detail-visual {
    height: 280px;
  }

  .about-info,
  .contact-card {
    padding: 28px 20px;
  }

  .product-visual {
    height: 320px;
  }
}

/* 移动端菜单 */
.mobile-nav {
  position: fixed;
  top: 0;
  right: -100%;
  width: 80%;
  max-width: 360px;
  height: 100vh;
  background: white;
  z-index: 200;
  padding: 80px 32px 32px;
  transition: right 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: -8px 0 32px rgba(0, 0, 0, 0.1);
}

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

.mobile-nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(31, 41, 55, 0.4);
  z-index: 150;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s, visibility 0.4s;
}

.mobile-nav-overlay.open {
  opacity: 1;
  visibility: visible;
}

.mobile-nav-close {
  position: absolute;
  top: 24px;
  right: 24px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--text-primary);
}

.mobile-nav ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.mobile-nav a {
  font-size: 1.2rem;
  color: var(--text-primary);
  font-weight: 400;
}

@media (min-width: 721px) {
  .mobile-nav,
  .mobile-nav-overlay {
    display: none;
  }
}

/* ============================================================
   品牌信任版（V2）新增组件
   ============================================================ */

/* Hero 大Logo展示 */
.hero-logo-stage {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 420px;
}

.hero-logo-stage .logo-halo {
  position: absolute;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(71, 136, 216, 0.10) 0%, rgba(71, 136, 216, 0.03) 55%, transparent 70%);
}

.hero-logo-stage .logo-ring {
  position: absolute;
  width: 330px;
  height: 330px;
  border-radius: 50%;
  border: 1px solid rgba(71, 136, 216, 0.18);
}

.hero-logo-stage .logo-ring.outer {
  width: 400px;
  height: 400px;
  border-color: rgba(71, 136, 216, 0.08);
}

.hero-logo-stage img.hero-logo-img {
  position: relative;
  z-index: 2;
  width: 220px;
  height: auto;
  filter: drop-shadow(0 20px 40px rgba(71, 136, 216, 0.18));
  animation: heroLogoFloat 7s ease-in-out infinite;
}

@keyframes heroLogoFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}

/* 信任基石卡片（沿用 feature-card，增强序号感） */
.trust-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

@media (max-width: 900px) {
  .trust-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .trust-grid { grid-template-columns: 1fr; }
}

.trust-card {
  background: var(--bg-card, #fff);
  border-radius: 20px;
  padding: 40px 32px;
  box-shadow: 0 8px 32px rgba(71, 136, 216, 0.07);
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.5s;
}

.trust-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 48px rgba(71, 136, 216, 0.12);
}

.trust-card .trust-no {
  font-family: 'Inter', sans-serif;
  font-size: 0.8rem;
  letter-spacing: 0.25em;
  color: var(--brand-blue);
  font-weight: 500;
  display: block;
  margin-bottom: 18px;
}

.trust-card h3 {
  font-size: 1.2rem;
  font-weight: 500;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.trust-card p {
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--text-secondary);
}

/* 品牌与公司关系 */
.relation-wrap {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 40px;
  max-width: 900px;
  margin: 0 auto;
}

@media (max-width: 720px) {
  .relation-wrap {
    grid-template-columns: 1fr;
    gap: 24px;
    text-align: center;
  }
}

.relation-node {
  background: #fff;
  border-radius: 24px;
  padding: 44px 36px;
  text-align: center;
  box-shadow: 0 8px 32px rgba(71, 136, 216, 0.08);
}

.relation-node img {
  height: 64px;
  width: auto;
  margin-bottom: 20px;
}

.relation-node h3 {
  font-size: 1.3rem;
  font-weight: 500;
  margin-bottom: 6px;
}

.relation-node .node-sub {
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  color: var(--text-tertiary);
  text-transform: uppercase;
  margin-bottom: 16px;
}

.relation-node p {
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--text-secondary);
}

.relation-arrow {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--brand-blue);
  font-size: 0.85rem;
  letter-spacing: 0.2em;
}

.relation-arrow svg {
  width: 48px;
  height: 24px;
}

@media (max-width: 720px) {
  .relation-arrow svg { transform: rotate(90deg); }
}

/* 合作邀请 CTA */
.invite-section {
  text-align: center;
  padding: 120px 24px;
  background: linear-gradient(180deg, #FFFFFF 0%, #E8F1FB 100%);
  border-radius: 32px;
  margin: 0 auto;
  max-width: 1200px;
}

.invite-section h2 {
  font-weight: 300;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin-bottom: 20px;
}

.invite-section p {
  color: var(--text-secondary);
  line-height: 1.9;
  max-width: 560px;
  margin: 0 auto 40px;
}

/* ============================================================
   AI 视觉图组件（V3）
   ============================================================ */

/* 通用视觉图 */
.ai-img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 24px;
  box-shadow: 0 20px 60px rgba(71, 136, 216, 0.14);
  object-fit: cover;
}

/* Hero 主视觉图 */
.hero-photo {
  position: relative;
  border-radius: 32px;
  overflow: hidden;
  box-shadow: 0 32px 80px rgba(71, 136, 216, 0.18);
}

.hero-photo img {
  width: 100%;
  height: 100%;
  min-height: 420px;
  object-fit: cover;
  display: block;
}

.hero-photo::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(71, 136, 216, 0.08) 100%);
  pointer-events: none;
}

/* 图文并排（视觉驱动） */
.split-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}

.split-section.reverse > .split-visual { order: 2; }

@media (max-width: 900px) {
  .split-section { grid-template-columns: 1fr; gap: 40px; }
  .split-section.reverse > .split-visual { order: 0; }
}

.split-visual img {
  width: 100%;
  border-radius: 28px;
  box-shadow: 0 24px 64px rgba(71, 136, 216, 0.15);
  display: block;
}

.split-text .label {
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 0.3em;
  color: var(--brand-blue);
  text-transform: uppercase;
  margin-bottom: 16px;
  font-weight: 500;
}

.split-text h2 {
  font-weight: 300;
  font-size: clamp(1.6rem, 3.2vw, 2.4rem);
  line-height: 1.4;
  margin-bottom: 24px;
}

.split-text p {
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 16px;
}

/* 场景图卡（图片版） */
.scene-card .scene-photo {
  border-radius: 20px 20px 0 0;
  overflow: hidden;
  aspect-ratio: 16 / 10;
}

.scene-card .scene-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.scene-card:hover .scene-photo img {
  transform: scale(1.04);
}

/* 章节配图（品牌故事） */
.chapter-img {
  margin: 40px 0 8px;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 20px 56px rgba(71, 136, 216, 0.13);
}

.chapter-img img {
  width: 100%;
  display: block;
}

/* 全宽视觉带 */
.wide-visual {
  border-radius: 32px;
  overflow: hidden;
  box-shadow: 0 28px 72px rgba(71, 136, 216, 0.16);
}

.wide-visual img {
  width: 100%;
  max-height: 560px;
  object-fit: cover;
  display: block;
}

/* ============================================================
   抽象戒指轮廓（V4）—— 产品形态抽象表达，非实物渲染
   ============================================================ */

.ring-stage {
  position: relative;
  border-radius: 32px;
  background: linear-gradient(160deg, #F6FAFE 0%, #E8F1FB 100%);
  box-shadow: 0 32px 80px rgba(71, 136, 216, 0.14);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  min-height: 420px;
}

.ring-stage::before {
  content: '';
  position: absolute;
  width: 140%;
  height: 140%;
  background: radial-gradient(circle at 30% 20%, rgba(255,255,255,0.9) 0%, transparent 40%);
  pointer-events: none;
}

.ring-stage img,
.ring-stage svg {
  position: relative;
  width: 72%;
  max-width: 380px;
  height: auto;
  animation: ringFloat 8s ease-in-out infinite;
}

@keyframes ringFloat {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-12px) rotate(-1.2deg); }
}

/* split 区内的轮廓图（无背景板，更轻） */
.ring-plain {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.ring-plain img,
.ring-plain svg {
  width: 100%;
  max-width: 440px;
  height: auto;
  filter: drop-shadow(0 24px 48px rgba(71, 136, 216, 0.16));
}

/* ============================================================
   V5 修正：戒指轮廓去框悬浮 + 首页公司优先
   ============================================================ */

/* 去掉 ring-stage 的背景框，只留悬浮圆环 */
.ring-stage {
  background: none;
  box-shadow: none;
  border-radius: 0;
  overflow: visible;
  min-height: 0;
}

.ring-stage::before {
  display: none;
}

.ring-stage img,
.ring-stage svg {
  width: 92%;
  max-width: 460px;
  filter: drop-shadow(0 34px 44px rgba(71, 136, 216, 0.24));
  animation: ringFloat 7s ease-in-out infinite;
}

/* 品牌标识区（首页 Hero 下方） */
.brand-hero-block {
  text-align: center;
  padding: 96px 24px;
  background: linear-gradient(180deg, #FFFFFF 0%, #F2F8FE 100%);
  border-radius: 32px;
}

.brand-hero-block img {
  height: 150px;
  width: auto;
  margin: 0 auto 32px;
  display: block;
  filter: drop-shadow(0 18px 36px rgba(71, 136, 216, 0.20));
}

.brand-hero-block h2 {
  font-weight: 300;
  font-size: clamp(2rem, 4.5vw, 3rem);
  letter-spacing: 0.08em;
}

.brand-hero-block .slogan {
  color: var(--text-secondary);
  margin-top: 18px;
  letter-spacing: 0.3em;
  font-size: 0.95rem;
}

.brand-hero-block .belong {
  color: var(--text-tertiary);
  margin-top: 14px;
  font-size: 0.875rem;
}

/* ============================================================
   V6 修正：极简圆环 —— 缩小尺寸、柔和悬浮投影
   ============================================================ */

.ring-stage img,
.ring-stage svg {
  width: 62%;
  max-width: 320px;
  filter: drop-shadow(0 26px 32px rgba(71, 136, 216, 0.20));
  animation: ringFloat 7s ease-in-out infinite;
}

@media (max-width: 768px) {
  .ring-stage img,
  .ring-stage svg {
    width: 58%;
    max-width: 240px;
  }
}

/* ============================================================
   V7 修正：圆环自带光晕，投影进一步柔化避免重叠发暗
   ============================================================ */

.ring-stage img,
.ring-stage svg {
  filter: drop-shadow(0 20px 26px rgba(71, 136, 216, 0.14));
}

/* ============================================================
   V8：拼音弱化（商标合规）+ 品牌区块重设计 + 治愈系背景层
   ============================================================ */

/* —— 1. 拼音全面弱化：汉字为主，拼音仅作小号注音 —— */
.brand-text .name-en {
  font-size: 9px;
  color: var(--text-tertiary);
  letter-spacing: 0.18em;
}

.brand-pinyin {
  margin-top: 10px;
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.5em;
  padding-left: 0.5em; /* 视觉居中补偿字距 */
  color: var(--text-tertiary);
  text-transform: uppercase;
}

/* —— 2. 品牌展示区块重设计 —— */
.brand-hero-block {
  position: relative;
  overflow: hidden;
  text-align: center;
  padding: 88px 24px 80px;
  background:
    radial-gradient(560px 320px at 88% -10%, rgba(71, 136, 216, 0.10), transparent 65%),
    radial-gradient(480px 300px at 6% 108%, rgba(168, 203, 242, 0.14), transparent 62%),
    linear-gradient(180deg, #FFFFFF 0%, #F2F8FE 100%);
  border: 1px solid rgba(71, 136, 216, 0.10);
  border-radius: 36px;
  box-shadow: 0 40px 90px rgba(71, 136, 216, 0.10);
}

.brand-hero-block > * {
  position: relative;
  z-index: 1;
}

.brand-mark {
  position: relative;
  display: inline-block;
  margin-bottom: 30px;
}

.brand-mark::before {
  content: '';
  position: absolute;
  inset: -46px;
  background: radial-gradient(circle, rgba(71, 136, 216, 0.14) 0%, rgba(111, 165, 228, 0.06) 48%, transparent 70%);
  border-radius: 50%;
  z-index: -1;
}

.brand-hero-block .brand-mark img {
  height: 88px;
  width: auto;
  margin: 0 auto;
  display: block;
  filter: drop-shadow(0 14px 26px rgba(71, 136, 216, 0.16));
}

.brand-hero-block h2 {
  font-weight: 300;
  font-size: clamp(2rem, 4.5vw, 2.9rem);
  letter-spacing: 0.14em;
  padding-left: 0.14em;
}

.brand-ornament {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 22px;
}

.brand-ornament span {
  width: 30px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(71, 136, 216, 0.45));
}

.brand-ornament span:last-child {
  background: linear-gradient(90deg, rgba(71, 136, 216, 0.45), transparent);
}

.brand-ornament i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: rgba(71, 136, 216, 0.55);
}

.brand-hero-block .slogan {
  color: var(--text-secondary);
  margin-top: 18px;
  letter-spacing: 0.3em;
  padding-left: 0.3em;
  font-size: 0.95rem;
}

.brand-hero-block .belong {
  color: var(--text-tertiary);
  margin-top: 14px;
  font-size: 0.875rem;
}

/* —— 3. 全站治愈系背景层：柔光蓝雾 + 极细雪点肌理 —— */
body {
  background-color: #FBFDFF;
  background-image:
    radial-gradient(60vw 42vw at 88% -8%, rgba(71, 136, 216, 0.07), transparent 62%),
    radial-gradient(48vw 38vw at -12% 30%, rgba(168, 203, 242, 0.10), transparent 60%),
    radial-gradient(54vw 42vw at 98% 84%, rgba(111, 165, 228, 0.06), transparent 60%),
    radial-gradient(circle, rgba(71, 136, 216, 0.05) 1px, transparent 1.7px);
  background-size: auto, auto, auto, 30px 30px;
  background-attachment: fixed, fixed, fixed, fixed;
}

@media (max-width: 768px) {
  .brand-hero-block {
    padding: 64px 20px 56px;
    border-radius: 28px;
  }
  .brand-hero-block .brand-mark img {
    height: 72px;
  }
}

/* V8b：浅色区块也带柔和层次，避免大面积平白 */
.section-light {
  background:
    radial-gradient(720px 380px at 12% -6%, rgba(255, 255, 255, 0.9), transparent 60%),
    radial-gradient(640px 420px at 96% 110%, rgba(168, 203, 242, 0.16), transparent 62%),
    linear-gradient(180deg, #F4F9FE 0%, #EDF5FD 100%);
}

/* V8c：页脚联系方式链接样式 */
.footer-contact-item a {
  color: inherit;
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-contact-item a:hover {
  color: var(--brand-blue);
}

/* V9b：全站轻提示 Toast（邮箱点击反馈） */
.site-toast {
  position: fixed;
  left: 50%;
  bottom: 36px;
  transform: translateX(-50%) translateY(16px);
  max-width: min(92vw, 560px);
  padding: 13px 24px;
  background: rgba(255, 255, 255, 0.98);
  color: #2F6AB8;
  border: 1px solid rgba(71, 136, 216, 0.28);
  border-radius: 999px;
  box-shadow: 0 16px 44px rgba(71, 136, 216, 0.20);
  font-size: 0.85rem;
  line-height: 1.6;
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease, transform 0.35s ease;
  z-index: 9999;
}

.site-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* V11b：邮箱发送方式选择面板 */
.mail-sheet {
  position: fixed;
  inset: 0;
  z-index: 10000;
  visibility: hidden;
  pointer-events: none;
}

.mail-sheet.open {
  visibility: visible;
  pointer-events: auto;
}

.mail-sheet-mask {
  position: absolute;
  inset: 0;
  background: rgba(31, 41, 55, 0.30);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  opacity: 0;
  transition: opacity 0.32s ease;
}

.mail-sheet.open .mail-sheet-mask {
  opacity: 1;
}

.mail-sheet-card {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) scale(0.96);
  width: min(92vw, 420px);
  background: #FFFFFF;
  border: 1px solid rgba(71, 136, 216, 0.14);
  border-radius: 26px;
  box-shadow: 0 40px 100px rgba(31, 41, 55, 0.22);
  padding: 30px 26px 22px;
  opacity: 0;
  transition: opacity 0.32s ease, transform 0.32s ease;
}

.mail-sheet.open .mail-sheet-card {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.mail-sheet-title {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-primary);
  text-align: center;
}

.mail-sheet-addr {
  margin: 8px 0 20px;
  text-align: center;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  color: var(--brand-blue);
}

.mail-opt {
  display: flex;
  flex-direction: column;
  gap: 2px;
  width: 100%;
  padding: 13px 18px;
  margin-bottom: 8px;
  background: #F6FAFE;
  border: 1px solid rgba(71, 136, 216, 0.10);
  border-radius: 14px;
  text-decoration: none;
  cursor: pointer;
  font-family: inherit;
  text-align: left;
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}

.mail-opt:hover {
  background: #E8F1FB;
  border-color: rgba(71, 136, 216, 0.28);
  transform: translateY(-1px);
}

.mail-opt-name {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-primary);
}

.mail-opt-desc {
  font-size: 0.76rem;
  color: var(--text-tertiary);
}

.mail-sheet-cancel {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 11px 0;
  background: none;
  border: none;
  font-family: inherit;
  font-size: 0.88rem;
  color: var(--text-tertiary);
  cursor: pointer;
  transition: color 0.25s ease;
}

.mail-sheet-cancel:hover {
  color: var(--text-primary);
}

@media (max-width: 768px) {
  .mail-sheet-card {
    top: auto;
    bottom: 0;
    left: 0;
    transform: translateY(24px);
    width: 100%;
    border-radius: 26px 26px 0 0;
    padding: 26px 20px calc(18px + env(safe-area-inset-bottom));
  }
  .mail-sheet.open .mail-sheet-card {
    transform: translateY(0);
  }
}

/* 面板打开瞬间禁用选项点击，防触屏穿透 */
.mail-sheet.arming .mail-sheet-card {
  pointer-events: none;
}

/* 选项增多后可滚动 */
.mail-sheet-opts {
  max-height: 48vh;
  overflow-y: auto;
  padding-right: 4px;
}

.mail-sheet-opts::-webkit-scrollbar {
  width: 4px;
}

.mail-sheet-opts::-webkit-scrollbar-thumb {
  background: rgba(71, 136, 216, 0.25);
  border-radius: 4px;
}