/* ==========================================================================
   钉钉官网 - 最终版 v164
   风格：软木公告板
   骨架：全出血横带 ｜ 首屏地图式场景，再功能，再亮点，再数据，再底部号召 ｜ 底部三入口并排，页脚单行
   配色：主色翠绿#738726 + 辅色青绿#D2E2CA + 点缀群青#2F54A7
   背景：软木公告板回纹硬边留白
   字体：华文楷体 + Crimson Pro
   ========================================================================== */

:root {
  /* 品牌色系 */
  --c-emerald: #738726;       /* 主色 翠绿 */
  --c-celadon: #D2E2CA;       /* 辅色 青绿 */
  --c-ultramarine: #2F54A7;   /* 点缀 群青 */
  
  /* 软木与公告板质感色系 */
  --c-cork-bg: #FAF7F2;       /* 软木暖米底 */
  --c-cork-surface: #FFFFFF;  /* 便签洁白反射底 */
  --c-cork-card: #FDFEFA;     /* 公告卡片底 */
  --c-cork-border: #CBD8C3;   /* 软木青绿接缝线 */
  --c-cork-dark-border: #738726; /* 翠绿硬边装订线 */
  
  /* 深墨绿夜幕带 */
  --c-dark-band: #182316;     /* 深墨绿暗夜带 */
  --c-dark-surface: #22301F;  /* 墨绿便签底 */
  
  /* 文字层级色 */
  --c-text-main: #1D241A;     /* 墨翠正文字 */
  --c-text-sub: #465541;      /* 沉静青翠说明字 */
  --c-text-muted: #72846D;    /* 典雅弱标字 */
  --c-text-inv: #FFFFFF;      /* 反白文字 */

  /* 字体族定义 */
  --font-kaiti: "STKaiti", "华文楷体", "KaiTi", "楷体", "Songti SC", serif;
  --font-crimson: "Crimson Pro", "Times New Roman", Georgia, serif;
  --font-sans-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  
  /* 版心宽度 */
  --container-width: 1200px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-kaiti);
  background-color: var(--c-cork-bg);
  color: var(--c-text-main);
  line-height: 1.8;
  letter-spacing: 0.025em;
  overflow-x: hidden;
  position: relative;
  /* 软木公告板回纹硬边留白背景：微粒软木点阵 + 几何传统回纹边线 + 留白 */
  background-image: 
    linear-gradient(135deg, rgba(250, 247, 242, 0.94) 0%, rgba(210, 226, 202, 0.28) 50%, rgba(255, 255, 255, 0.95) 100%),
    url("data:image/svg+xml,%3Csvg width='80' height='80' viewBox='0 0 80 80' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23738726' fill-opacity='0.035'%3E%3Cpath d='M0 0h40v8H8v24h24v8H0V0zm40 40h40v8H48v24h24v8H40V40z'/%3E%3Ccircle cx='20' cy='60' r='1.5'/%3E%3Ccircle cx='60' cy='20' r='1.5'/%3E%3C/g%3E%3C/svg%3E");
  background-attachment: fixed;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.25s ease;
}

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

/* 核心骨架：全出血横带 (Full-bleed Horizontal Band) */
.full-bleed-band {
  width: 100%;
  position: relative;
  border-bottom: 1px solid var(--c-cork-border);
}

.band-inner {
  width: 100%;
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* 1. 顶部导航栏 (全出血横带) */
.nav-bleed-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(250, 247, 242, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 2px solid var(--c-emerald);
  box-shadow: 0 4px 16px rgba(115, 135, 38, 0.08);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

.brand-anchor {
  display: flex;
  align-items: center;
  gap: 12px;
}

.cork-logo-frame {
  width: 42px;
  height: 42px;
  background: #FFF;
  border: 1px solid var(--c-emerald);
  box-shadow: 0 2px 6px rgba(115, 135, 38, 0.15);
  padding: 3px;
  border-radius: 3px;
}

.brand-text-cluster {
  display: flex;
  flex-direction: column;
}

.brand-title-cn {
  font-family: var(--font-kaiti);
  font-size: 22px;
  font-weight: 700;
  color: var(--c-emerald);
  line-height: 1.2;
}

.brand-tag-en {
  font-family: var(--font-crimson);
  font-size: 11px;
  color: var(--c-ultramarine);
  letter-spacing: 0.14em;
  font-weight: 600;
}

.main-navigation-menu {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.main-navigation-menu a {
  font-family: var(--font-kaiti);
  font-size: 17px;
  font-weight: 600;
  color: var(--c-text-sub);
  padding: 6px 4px;
  position: relative;
}

.main-navigation-menu a:hover,
.main-navigation-menu a.active {
  color: var(--c-emerald);
}

.main-navigation-menu a.active::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--c-emerald);
}

.header-action-btns {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  font-family: var(--font-kaiti);
  font-size: 16px;
  font-weight: 700;
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.25s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--c-emerald);
  color: #FFF;
  border: 1px solid var(--c-emerald);
  box-shadow: 0 4px 12px rgba(115, 135, 38, 0.25);
}

.btn-primary:hover {
  background: #5c6c1d;
  box-shadow: 0 6px 18px rgba(115, 135, 38, 0.35);
  transform: translateY(-2px);
}

.btn-secondary {
  background: #FFF;
  color: var(--c-emerald);
  border: 1px solid var(--c-emerald);
}

.btn-secondary:hover {
  background: var(--c-celadon);
  transform: translateY(-2px);
}

.btn-ultramarine {
  background: var(--c-ultramarine);
  color: #FFF;
  border: 1px solid var(--c-ultramarine);
  box-shadow: 0 4px 12px rgba(47, 84, 167, 0.25);
}

.btn-ultramarine:hover {
  background: #234083;
  transform: translateY(-2px);
}

.btn-sm {
  padding: 7px 18px;
  font-size: 15px;
}

.btn-lg {
  padding: 13px 32px;
  font-size: 18px;
}

/* 2. 首屏全出血横带：地图式场景 (Hero Map-Scene Band) */
.hero-map-band {
  background: linear-gradient(180deg, #FAF7F2 0%, #F3F8EE 100%);
  padding-top: 54px;
  padding-bottom: 64px;
  border-bottom: 2px solid var(--c-emerald);
  position: relative;
  overflow: hidden;
}

/* 软木回纹装饰边带 */
.cork-meander-strip {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.cork-pin-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 14px;
  background: var(--c-celadon);
  border: 1px solid var(--c-emerald);
  font-size: 14px;
  color: var(--c-emerald);
  font-weight: 700;
  letter-spacing: 0.05em;
}

.cork-pin-tag::before {
  content: "●";
  color: var(--c-ultramarine);
  font-size: 12px;
}

.hero-main-h1 {
  font-family: var(--font-kaiti);
  font-size: 42px;
  line-height: 1.35;
  color: var(--c-emerald);
  font-weight: 800;
  margin-bottom: 22px;
  letter-spacing: 0.02em;
}

.hero-main-h1 span {
  color: var(--c-ultramarine);
}

.hero-lead-text {
  font-size: 19px;
  color: var(--c-text-sub);
  line-height: 1.85;
  max-width: 960px;
  margin-bottom: 28px;
}

.hero-cta-buttons {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

/* 地图式场景工作台画卷 */
.map-scene-board {
  background: #FFF;
  border: 2px solid var(--c-emerald);
  padding: 16px;
  box-shadow: 0 12px 36px rgba(115, 135, 38, 0.12);
  position: relative;
}

.map-scene-board::after {
  content: "■ 实时协同节点网络已对齐";
  position: absolute;
  top: 24px;
  right: 24px;
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid var(--c-emerald);
  padding: 4px 12px;
  font-size: 13px;
  color: var(--c-emerald);
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.map-scene-board img {
  width: 100%;
  border: 1px solid var(--c-cork-border);
}

/* 地图场景节点状态状态指示卡带 */
.map-status-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 20px;
}

.map-node-card {
  background: var(--c-cork-card);
  border: 1px solid var(--c-cork-border);
  padding: 14px 18px;
  border-left: 4px solid var(--c-emerald);
}

.map-node-city {
  font-size: 16px;
  font-weight: 700;
  color: var(--c-emerald);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.map-node-status {
  font-family: var(--font-crimson);
  font-size: 13px;
  color: var(--c-ultramarine);
  font-weight: 600;
}

.map-node-desc {
  font-size: 13.5px;
  color: var(--c-text-sub);
  margin-top: 4px;
}

/* 3. 再功能：全出血横带 (Features Band) */
.features-bleed-band {
  background: #FFFFFF;
  padding-top: 68px;
  padding-bottom: 68px;
}

.band-header-box {
  margin-bottom: 40px;
  text-align: left;
}

.band-kicker-en {
  font-family: var(--font-crimson);
  font-size: 14px;
  color: var(--c-ultramarine);
  letter-spacing: 0.16em;
  font-weight: 700;
  text-transform: uppercase;
  display: block;
  margin-bottom: 8px;
}

.band-title-cn {
  font-size: 32px;
  font-weight: 800;
  color: var(--c-emerald);
  line-height: 1.35;
  margin-bottom: 12px;
}

.band-subtitle-p {
  font-size: 16px;
  color: var(--c-text-sub);
  max-width: 860px;
}

.features-four-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.cork-feature-card {
  background: var(--c-cork-bg);
  border: 1px solid var(--c-cork-border);
  border-top: 4px solid var(--c-emerald);
  padding: 24px 20px;
  box-shadow: 0 4px 16px rgba(115, 135, 38, 0.05);
  transition: all 0.3s ease;
  position: relative;
}

.cork-feature-card:hover {
  transform: translateY(-4px);
  border-top-color: var(--c-ultramarine);
  box-shadow: 0 8px 24px rgba(47, 84, 167, 0.12);
}

.cork-card-badge {
  font-family: var(--font-crimson);
  font-size: 26px;
  font-weight: 700;
  color: var(--c-emerald);
  line-height: 1;
  margin-bottom: 12px;
}

.cork-card-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--c-emerald);
  margin-bottom: 10px;
}

.cork-card-text {
  font-size: 14.5px;
  color: var(--c-text-sub);
  line-height: 1.8;
  margin-bottom: 16px;
}

.cork-card-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.cork-tag-pill {
  font-size: 12px;
  padding: 2px 8px;
  background: #FFF;
  border: 1px solid var(--c-celadon);
  color: var(--c-emerald);
}

/* 4. 再亮点：全出血横带 (Highlights Band) */
.highlights-bleed-band {
  background: var(--c-cork-bg);
  padding-top: 68px;
  padding-bottom: 68px;
}

.highlight-row-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: center;
  margin-bottom: 40px;
  background: #FFF;
  border: 1px solid var(--c-cork-border);
  padding: 28px;
}

.highlight-row-split.reversed {
  grid-template-columns: 1fr 1fr;
}

.highlight-text-content h3 {
  font-size: 24px;
  font-weight: 800;
  color: var(--c-emerald);
  margin-bottom: 14px;
  border-left: 4px solid var(--c-ultramarine);
  padding-left: 14px;
}

.highlight-text-content p {
  font-size: 15.5px;
  color: var(--c-text-sub);
  line-height: 1.85;
  margin-bottom: 16px;
}

.highlight-pic-box {
  border: 1px solid var(--c-celadon);
  overflow: hidden;
}

.highlight-pic-box img {
  width: 100%;
  transition: transform 0.4s ease;
}

.highlight-row-split:hover .highlight-pic-box img {
  transform: scale(1.02);
}

/* 5. 再数据与背书：全出血横带 (Data Band) */
.data-bleed-band {
  background: #FFFFFF;
  padding-top: 64px;
  padding-bottom: 64px;
}

.cork-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
  border-bottom: 1px solid var(--c-cork-border);
  padding-bottom: 32px;
  margin-bottom: 32px;
}

.cork-stat-cell {
  padding: 12px;
}

.cork-stat-num {
  font-family: var(--font-crimson);
  font-size: 38px;
  font-weight: 700;
  color: var(--c-emerald);
  line-height: 1.1;
}

.cork-stat-num span {
  font-size: 20px;
  color: var(--c-ultramarine);
  font-family: var(--font-kaiti);
  margin-left: 4px;
}

.cork-stat-desc {
  font-size: 14px;
  color: var(--c-text-sub);
  margin-top: 8px;
}

.cork-client-wall {
  text-align: center;
}

.cork-wall-label {
  font-size: 14px;
  color: var(--c-text-muted);
  letter-spacing: 0.1em;
  margin-bottom: 18px;
}

.cork-wall-frame {
  border: 1px solid var(--c-celadon);
  padding: 12px;
  background: var(--c-cork-card);
}

/* 6. 再底部号召：全出血横带 (Bottom Call-to-Action Band) */
.cta-bleed-band {
  background: var(--c-dark-band);
  color: var(--c-text-inv);
  padding-top: 60px;
  padding-bottom: 60px;
  border-top: 3px solid var(--c-emerald);
  border-bottom: 3px solid var(--c-ultramarine);
  text-align: center;
}

.cta-headline-h2 {
  font-size: 34px;
  font-weight: 800;
  letter-spacing: 0.04em;
  margin-bottom: 14px;
  color: #FFF;
}

.cta-sub-copy {
  font-size: 16px;
  color: var(--c-celadon);
  max-width: 800px;
  margin: 0 auto 36px;
  line-height: 1.85;
}

/* 7. 核心：底部三入口并排 (3 Parallel Entry Cards) */
.bottom-three-entries-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 36px;
  text-align: left;
}

.entry-card-pod {
  background: var(--c-dark-surface);
  border: 1px solid var(--c-emerald);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: 0 8px 24px rgba(0,0,0,0.25);
  transition: all 0.3s ease;
}

.entry-card-pod:hover {
  transform: translateY(-4px);
  border-color: var(--c-celadon);
}

.entry-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  border-bottom: 1px solid rgba(210, 226, 202, 0.25);
  padding-bottom: 8px;
}

.entry-card-title {
  font-size: 20px;
  font-weight: 700;
  color: #FFF;
}

.entry-card-tag {
  font-family: var(--font-crimson);
  font-size: 12px;
  color: var(--c-celadon);
  letter-spacing: 0.08em;
}

.entry-card-desc {
  font-size: 14px;
  color: #D2E2CA;
  line-height: 1.7;
  margin-bottom: 20px;
}

/* 扫码快速配对底栏 */
.cta-scan-strip {
  display: inline-flex;
  align-items: center;
  gap: 20px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(210, 226, 202, 0.3);
  padding: 16px 28px;
  text-align: left;
}

.cta-qr-img {
  width: 80px;
  height: 80px;
  background: #FFF;
  padding: 4px;
  border-radius: 2px;
}

.cta-scan-guide h4 {
  font-size: 16px;
  color: #FFF;
  margin-bottom: 4px;
}

.cta-scan-guide p {
  font-size: 13px;
  color: var(--c-celadon);
}

/* 8. 核心：页脚单行 (Footer Single Line) */
.single-line-bleed-footer {
  width: 100%;
  background: #FFFFFF;
  border-top: 1px solid var(--c-cork-border);
  padding: 18px 0;
}

.footer-single-line-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
  color: var(--c-text-sub);
}

.footer-anchors-row {
  display: flex;
  align-items: center;
  gap: 16px;
  list-style: none;
}

.footer-anchors-row a {
  color: var(--c-text-sub);
  font-weight: 600;
}

.footer-anchors-row a:hover {
  color: var(--c-emerald);
}

.footer-icp-text {
  color: var(--c-text-muted);
}

/* 响应式适配 */
@media (max-width: 992px) {
  .features-four-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .highlight-row-split,
  .highlight-row-split.reversed {
    grid-template-columns: 1fr;
  }
  .bottom-three-entries-grid {
    grid-template-columns: 1fr;
  }
  .map-status-strip {
    grid-template-columns: repeat(2, 1fr);
  }
  .cork-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .header-content {
    height: auto;
    padding: 12px 0;
    flex-direction: column;
    gap: 12px;
  }
  .hero-main-h1 {
    font-size: 28px;
  }
  .features-four-grid {
    grid-template-columns: 1fr;
  }
  .footer-single-line-inner {
    flex-direction: column;
    text-align: center;
    gap: 8px;
  }
}