:root {
  /* 现代科技品牌微渐变 (基于阳光电源经典光谱) */
  --grad-orange-primary: linear-gradient(135deg, #FF8A00 0%, #FF6600 50%, #E65A00 100%);
  --grad-orange-glow: linear-gradient(135deg, #FFA033 0%, #FF7900 100%);
  --grad-dark-surface: linear-gradient(180deg, #1C2028 0%, #12151B 100%);
  --grad-light-card: linear-gradient(180deg, #FFFFFF 0%, #F9FAFB 100%);
  --grad-accent-cyan: linear-gradient(135deg, #00B4D8 0%, #0077B6 100%);
  
  /* 纯色核心定义 - 严格对标阳光电源 SUNGROW 官方协调色调 */
  --sungrow-orange: #FF7900;       /* 阳光电源标志性标准阳光橙 (明亮、通透、科技感) */
  --sungrow-orange-dark: #E66A00;
  --sungrow-orange-light: #FFF7ED;
  --sungrow-dark: #1D2129;         /* 阳光电源同款高阶大厂深黑 (深邃而不死板) */
  --sungrow-charcoal: #11141A;     /* Footer 背景 */
  
  /* 背景层次 */
  --bg-white: #FFFFFF;
  --bg-light: #F4F6F9;            /* 清爽素雅浅冷底色 */
  --bg-card: #FFFFFF;
  --bg-subtle: #EDF0F5;
  
  /* 文字与排版色彩系统 (彻底对标阳光电源的高级灰度平衡) */
  --text-title: #1D2129;          /* 主标题：深邃温润大厂黑，不刺眼不死黑 */
  --text-subtitle: #333333;       /* 二级标题与核心强文本：沉稳高阶 */
  --text-body: #606060;           /* 阳光电源同款标志正文灰：柔和协调，呼吸感极佳 */
  --text-muted: #86909C;          /* 次级辅助与说明标签 */
  --text-light: #A8A8A8;          /* 轻量版权与占位符 */
  
  /* 精致微边框与现代柔光阴影 (取代粗暴线条) */
  --border-subtle: rgba(0, 0, 0, 0.07);
  --border-hover: rgba(255, 121, 0, 0.35);
  
  --shadow-card: 0 4px 20px -2px rgba(18, 22, 30, 0.05), 0 2px 6px -1px rgba(18, 22, 30, 0.03);
  --shadow-card-hover: 0 20px 40px -4px rgba(18, 22, 30, 0.12), 0 8px 16px -2px rgba(18, 22, 30, 0.06);
  --shadow-btn-orange: 0 6px 20px -2px rgba(255, 121, 0, 0.42), inset 0 1px 0 rgba(255, 255, 255, 0.3);
  --shadow-btn-dark: 0 6px 20px -2px rgba(18, 22, 30, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.12);
  
  /* 现代圆角 */
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 9999px;
  
  /* 现代国际科技字体栈：西文几何无衬线优先 + 苹方/微黑优雅中文排版 */
  --font-family: "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  --font-heading: "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
  --font-mono-numbers: "Arial", "Segoe UI", sans-serif;
  --transition-smooth: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  max-width: 100%;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-white);
  color: var(--text-body);
  line-height: 1.75;
  letter-spacing: 0.15px;
  overflow-x: clip;
  max-width: 100vw;
  position: relative;
  font-feature-settings: "cv02", "cv03", "cv04", "cv11";
}

h1, h2, h3, h4, h5, h6 {
  color: var(--text-title);
  font-family: var(--font-heading);
  letter-spacing: -0.02em;
  font-weight: 700;
}

/* 暗色背景容器中的标题与文本强制白字保护 */
.sungrow-hero-slider h1,
.sungrow-hero-slider h2,
.sungrow-hero-slider h3,
.sungrow-slide-title,
.part-mission-banner h1,
.part-mission-banner h2,
.part-mission-banner .mission-title,
.detail-hero-banner h1,
.detail-hero-banner h2,
.detail-hero-banner h3,
.sungrow-gallery-part2 h1,
.sungrow-gallery-part2 h2,
.sungrow-gallery-part2 h3,
.gallery-char,
.sungrow-footer h1,
.sungrow-footer h2,
.sungrow-footer h3,
.sungrow-footer h4,
.sungrow-footer .footer-col-title {
  color: #FFFFFF !important;
}

.sungrow-slide-desc,
.part-mission-banner p,
.mission-content p,
.detail-hero-banner p,
.detail-hero-banner .hero-desc,
.detail-hero-banner [class*="desc"],
.about-hero-desc,
.detail-hero-desc,
.hero-content-wrapper p {
  color: rgba(255, 255, 255, 0.92) !important;
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.45);
}

p {
  color: var(--text-body);
  line-height: 1.75;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-smooth);
}

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

/* 容器与边距 */
.container {
  width: 100%;
  max-width: 1400px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 36px;
  padding-right: 36px;
}

.section-spacing {
  padding-top: 110px;
  padding-bottom: 110px;
}

@media (max-width: 768px) {
  .section-spacing {
    padding-top: 60px;
    padding-bottom: 60px;
  }
  .container {
    padding-left: 20px;
    padding-right: 20px;
  }
}

/* 现代大厂标题排版 (消除呆板感) */
.sungrow-header {
  margin-bottom: 48px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 28px;
  position: relative;
}

.sungrow-header.center {
  text-align: center;
  justify-content: center;
  flex-direction: column;
  align-items: center;
}

.sungrow-header .header-text-group {
  flex: 1;
  max-width: 780px;
}

.sungrow-header-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--sungrow-orange);
  background: rgba(255, 112, 0, 0.08);
  border: 1px solid rgba(255, 112, 0, 0.2);
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  margin-bottom: 12px;
}

/* 深色背景下的标签 */
.dark-theme .sungrow-header-tag,
section[style*="#000000"] .sungrow-header-tag,
section[style*="#000"] .sungrow-header-tag,
section[style*="background: rgb(0, 0, 0)"] .sungrow-header-tag {
  background: rgba(255, 112, 0, 0.15);
  border-color: rgba(255, 112, 0, 0.35);
  color: #FFA040;
}

.sungrow-header-action {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

.header-meta-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--sungrow-orange);
  background: rgba(255, 112, 0, 0.08);
  border: 1px solid rgba(255, 112, 0, 0.2);
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  margin-bottom: 16px;
}

.sungrow-header-title {
  font-size: 38px;
  font-weight: 800;
  color: var(--sungrow-dark);
  line-height: 1.25;
  letter-spacing: -0.6px;
  margin: 0;
}

.sungrow-header-title span {
  background: var(--grad-orange-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.sungrow-header-sub {
  font-size: 15.5px;
  color: var(--text-body);
  max-width: 680px;
  margin-top: 10px;
  line-height: 1.7;
}

/* ===================================================================
   高阶现代按钮系统 (含精美微渐变、内发光与位移动效，拒绝粗糙AI感)
=================================================================== */
.btn-sungrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 30px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.2px;
  cursor: pointer;
  transition: var(--transition-smooth);
  border: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  user-select: none;
}

/* 核心主按钮：活力太阳微渐变 + 柔光扩散 */
.btn-sungrow-primary {
  background: var(--grad-orange-primary);
  color: #FFFFFF;
  box-shadow: var(--shadow-btn-orange);
}

.btn-sungrow-primary:hover {
  background: var(--grad-orange-glow);
  transform: translateY(-2.5px);
  box-shadow: 0 10px 28px -2px rgba(255, 112, 0, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

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

/* 深色黑金质感按钮：微炭灰渐变 + 细腻微光 */
.btn-sungrow-dark {
  background: var(--grad-dark-surface);
  color: #FFFFFF;
  border: 1px solid rgba(255, 255, 255, 0.16);
  box-shadow: var(--shadow-btn-dark);
}

.btn-sungrow-dark:hover {
  background: linear-gradient(180deg, #272C38 0%, #171A21 100%);
  border-color: rgba(255, 112, 0, 0.6);
  transform: translateY(-2.5px);
  box-shadow: 0 10px 28px -2px rgba(18, 22, 30, 0.45);
}

/* 白底现代轻拟态按钮 */
.btn-sungrow-white {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  color: var(--sungrow-dark);
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
}

.btn-sungrow-white:hover {
  background: var(--grad-orange-primary);
  color: #FFFFFF;
  border-color: transparent;
  transform: translateY(-2.5px);
  box-shadow: var(--shadow-btn-orange);
}

/* 细致轮廓按钮 */
.btn-sungrow-outline {
  background: #FFFFFF;
  border: 1.5px solid #D1D5DB;
  color: var(--sungrow-dark);
}

.btn-sungrow-outline:hover {
  border-color: var(--sungrow-orange);
  color: var(--sungrow-orange);
  background: rgba(255, 112, 0, 0.04);
  transform: translateY(-2px);
}

.btn-arrow-icon {
  width: 16px;
  height: 16px;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  stroke-width: 2.2;
}

.btn-sungrow:hover .btn-arrow-icon {
  transform: translateX(5px);
}

/* 现代栅格 */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 36px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 36px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

@media (max-width: 1024px) {
  .grid-3, .grid-4 {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .sungrow-header {
    flex-direction: column !important;
    align-items: flex-start !important;
    justify-content: flex-start !important;
    gap: 16px !important;
    margin-bottom: 26px !important;
  }
  .sungrow-header .header-text-group {
    width: 100% !important;
    max-width: 100% !important;
  }
  .sungrow-header-tag {
    font-size: 11px !important;
    letter-spacing: 1.5px !important;
    padding: 4px 12px !important;
    margin-bottom: 8px !important;
  }
  .sungrow-header-title {
    font-size: 24px !important;
    font-weight: 800 !important;
    line-height: 1.3 !important;
    letter-spacing: -0.4px !important;
  }
  .sungrow-header-sub {
    font-size: 13.5px !important;
    line-height: 1.6 !important;
    color: #64748B !important;
    margin-top: 8px !important;
  }
  .sungrow-header-action {
    width: 100% !important;
    display: flex !important;
  }
  .sungrow-header .btn-sungrow {
    width: 100% !important;
    height: 44px !important;
    padding: 0 20px !important;
    font-size: 13.5px !important;
    font-weight: 600 !important;
    border-radius: 12px !important;
    justify-content: center !important;
    box-sizing: border-box !important;
    letter-spacing: 0.3px !important;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04) !important;
  }
}

@media (max-width: 480px) {
  .sungrow-header {
    gap: 14px !important;
    margin-bottom: 22px !important;
  }
  .sungrow-header-title {
    font-size: 22px !important;
  }
  .sungrow-header-sub {
    font-size: 13px !important;
  }
  .sungrow-header .btn-sungrow {
    height: 42px !important;
    font-size: 13px !important;
    border-radius: 10px !important;
  }
}

/* ===================================================================
   Remix Icon 现代工业排版全局规范与交互
=================================================================== */
i[class^="ri-"], i[class*=" ri-"] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  vertical-align: -0.05em;
  line-height: 1;
}

/* 资讯与卡片元数据标签行内图标光学居中 */
.news-meta-item,
span:has(> i[class^="ri-"]) {
  display: inline-flex;
  align-items: center;
  vertical-align: middle;
}

span:has(> i[class^="ri-"]) i {
  vertical-align: 0 !important;
  margin-top: -1px;
}

/* 按钮内箭头微动效 */
.btn-arrow-icon,
.btn-sungrow [class^="ri-arrow-"],
.btn-sungrow [class*=" ri-arrow-"] {
  font-size: 1.15em;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-sungrow:hover .btn-arrow-icon,
.btn-sungrow:hover [class^="ri-arrow-"],
.btn-sungrow:hover [class*=" ri-arrow-"] {
  transform: translateX(4px);
}

/* 导航下拉链接内箭头 */
.dropdown-link [class^="ri-"],
.dropdown-link [class*=" ri-"] {
  font-size: 15px;
  color: var(--text-muted);
  transition: transform 0.25s ease, color 0.25s ease;
}

.dropdown-link:hover [class^="ri-"],
.dropdown-link:hover [class*=" ri-"] {
  color: var(--sungrow-orange);
  transform: translateX(3px);
}

/* 方案画卷子项内箭头 */
.gallery-subitem [class^="ri-"] {
  font-size: 14px;
  transition: transform 0.25s ease, color 0.25s ease;
}

.gallery-subitem:hover [class^="ri-"] {
  color: var(--sungrow-orange);
  transform: translateX(4px);
}