/* ============================================================
   上海颜容商贸有限公司 · 官方网站
   多页架构 · 2026-04-22 重构版
   Color: Deep Navy #1E3A5F / Champagne Gold #B8935A
   Rule: 居中 / 不裁人脸 / 对称留白 / 一行能放下就一行
   ============================================================ */

:root {
  --primary: #1E3A5F;
  --primary-dark: #142940;
  --primary-light: #2A527F;
  --accent: #B8935A;
  --accent-light: #D4B283;
  --accent-dark: #8E6F3F;
  --text: #2B2B2B;
  --text-light: #555;
  --muted: #8A8A8A;
  --bg: #FFFFFF;
  --bg-alt: #F7F8FA;
  --bg-soft: #EDEFF3;
  --bg-dark: #0F1F33;
  --border: #E5E7EB;
  --shadow-sm: 0 2px 8px rgba(30, 58, 95, 0.06);
  --shadow: 0 10px 30px rgba(30, 58, 95, 0.08);
  --shadow-lg: 0 20px 60px rgba(30, 58, 95, 0.15);
  --radius: 6px;
  --radius-lg: 12px;
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "STHeiti Medium", "Noto Sans SC", "Microsoft YaHei", "Helvetica Neue", "Inter", sans-serif;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
h1, h2, h3, h4 { font-weight: 600; line-height: 1.35; letter-spacing: 0.02em; }
p { color: var(--text-light); }

/* ===== 通用居中铁律:所有 section 默认居中 ===== */
.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 28px;
  text-align: center;
}
.narrow {
  max-width: 900px;
  margin: 0 auto;
}
.wide {
  max-width: 1100px;
  margin: 0 auto;
}

/* ===== NAVBAR (共用) ===== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: 72px;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(30, 58, 95, 0.06);
  transition: var(--transition);
}
.navbar.scrolled {
  box-shadow: 0 4px 20px rgba(30, 58, 95, 0.08);
  height: 64px;
}
.nav-inner {
  height: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.nav-center { flex: 1; display: flex; justify-content: flex-end; }
.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--primary);
}
.nav-logo .logo-img {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  flex-shrink: 0;
  object-fit: contain;
}
.nav-logo .logo-placeholder {
  display: inline-flex;
  flex-direction: column;
  line-height: 1;
  padding: 6px 10px;
  border-left: 2px solid var(--accent);
}
.nav-logo .logo-cn {
  font-size: 18px;
  letter-spacing: 0.08em;
  color: var(--primary);
  font-weight: 700;
}
.nav-logo .logo-en {
  font-size: 10px;
  letter-spacing: 0.25em;
  color: var(--accent);
  font-weight: 500;
  margin-top: 3px;
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav-menu a {
  display: block;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  position: relative;
}
.nav-menu a::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: var(--transition);
}
.nav-menu a:hover { color: var(--primary); }
.nav-menu a:hover::after { width: calc(100% - 32px); left: 16px; }
.nav-menu a.active { color: var(--primary); font-weight: 600; }
.nav-menu a.active::after { width: calc(100% - 32px); left: 16px; }
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  padding: 8px;
}
.nav-toggle span {
  height: 2px;
  background: var(--primary);
  transition: var(--transition);
  border-radius: 2px;
}

/* ===== NAV SEARCH ===== */
.nav-search {
  display: flex;
  align-items: center;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 4px 4px 14px;
  transition: var(--transition);
  height: 36px;
  width: 200px;
}
.nav-search:focus-within {
  background: #fff;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(184, 147, 90, 0.12);
  width: 230px;
}
.nav-search input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-size: 13px;
  color: var(--text);
  font-family: inherit;
  padding: 0 8px 0 0;
  min-width: 0;
}
.nav-search input::placeholder { color: var(--muted); }
.nav-search button {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: none;
  background: var(--primary);
  color: var(--accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
}
.nav-search button:hover {
  background: var(--accent);
  color: #fff;
}
.nav-search button svg { width: 14px; height: 14px; }
.nav-search-toggle {
  display: none;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--primary);
  align-items: center;
  justify-content: center;
  padding: 0;
}
.nav-search-toggle svg { width: 20px; height: 20px; }

/* ===== HERO · 首页大 Hero ===== */
.hero {
  position: relative;
  min-height: 92vh;
  padding: 160px 0 100px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--primary-dark);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url(../images/hero.jpg);
  background-size: cover;
  background-position: center;
}
.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15, 31, 51, 0.85) 0%, rgba(30, 58, 95, 0.6) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
  text-align: center;
  padding: 0 28px;
  margin: 0 auto;
  color: #fff;
  width: 100%;
}
.hero-eyebrow {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--accent-light);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(212, 178, 131, 0.4);
}
.hero h1 {
  font-size: 52px;
  line-height: 1.2;
  color: #fff;
  margin-bottom: 24px;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
  letter-spacing: 0.04em;
}
.hero h1 .gold { color: var(--accent-light); }
.hero-sub {
  font-size: 19px;
  color: rgba(255, 255, 255, 0.92);
  max-width: 720px;
  line-height: 1.75;
  margin: 0 auto 36px;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
}
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 56px;
  flex-wrap: wrap;
  margin-top: 40px;
}
.hero-stat {
  text-align: center;
  color: #fff;
}
.hero-stat .num {
  font-size: 30px;
  font-weight: 700;
  color: var(--accent-light);
  letter-spacing: 0.03em;
  font-family: "Helvetica Neue", "Inter", sans-serif;
}
.hero-stat .lbl {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.75);
  letter-spacing: 0.15em;
  margin-top: 4px;
}

/* ===== PAGE HERO · 二级页面小 Hero (背景图 + 深蓝蒙版) ===== */
.page-hero {
  position: relative;
  min-height: 300px;
  padding: 150px 0 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  background-color: var(--primary-dark);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15, 31, 51, 0.82) 0%, rgba(30, 58, 95, 0.58) 100%);
  z-index: 1;
}

/* 各页面专属 hero 背景图 */
.page-hero-about { background-image: url('../images/hero-about.jpg'); }
.page-hero-business { background-image: url('../images/hero-business.jpg'); }
.page-hero-project { background-image: url('../images/hero-project.jpg'); }
.page-hero-contact { background-image: url('../images/hero-contact.jpg'); }

.page-hero-inner {
  position: relative;
  z-index: 2;
  color: #fff;
  padding: 0 28px;
  max-width: 1080px;
}
.page-hero .eyebrow {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.35em;
  color: var(--accent-light);
  margin-bottom: 14px;
}
.page-hero h1 {
  font-size: 38px;
  color: #fff;
  letter-spacing: 0.05em;
  line-height: 1.3;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.45);
}
.page-hero .divider {
  display: block;
  width: 48px;
  height: 2px;
  background: var(--accent);
  margin: 16px auto 0;
}

/* ===== SECTION BASE ===== */
.section {
  padding: 80px 0;
  position: relative;
  text-align: center;
}
.section-alt { background: var(--bg-alt); }
.section-soft { background: var(--bg-soft); }
.section-dark {
  background: var(--primary-dark);
  color: #fff;
}
.section-dark h2, .section-dark h3 { color: #fff; }
.section-dark p { color: rgba(255, 255, 255, 0.82); }
.section-head {
  text-align: center;
  margin-bottom: 56px;
}
.section-eyebrow {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--accent);
  margin-bottom: 16px;
  font-weight: 500;
}
.section-head h2 {
  font-size: 36px;
  color: var(--primary);
  margin-bottom: 16px;
  letter-spacing: 0.04em;
}
.section-dark .section-head h2 { color: #fff; }
.section-head .desc {
  max-width: 680px;
  margin: 0 auto;
  font-size: 16px;
  color: var(--text-light);
}
.section-dark .section-head .desc { color: rgba(255, 255, 255, 0.75); }
.section-divider {
  display: block;
  width: 48px;
  height: 2px;
  background: var(--accent);
  margin: 0 auto 20px;
}

/* ===== 首页卡片 grid(6 个二级页面入口)===== */
.index-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 8px;
}
.index-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 28px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.index-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 3px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);
}
.index-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.index-card:hover::before { transform: scaleX(1); }
.index-card .icon {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 22px;
  color: var(--accent-light);
  transition: var(--transition);
}
.index-card:hover .icon {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
  color: #fff;
}
.index-card .icon svg { width: 28px; height: 28px; }
.index-card h3 {
  font-size: 18px;
  color: var(--primary);
  margin-bottom: 10px;
  letter-spacing: 0.03em;
}
.index-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 18px;
  max-width: 280px;
}
.index-card .more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--accent);
  font-weight: 500;
  letter-spacing: 0.08em;
  margin-top: auto;
}
.index-card .more::after {
  content: "→";
  transition: var(--transition);
}
.index-card:hover .more::after { transform: translateX(4px); }

/* ===== ABOUT 页面文案区 ===== */
.about-intro {
  max-width: 860px;
  margin: 0 auto;
  text-align: center;
}
.about-intro p {
  font-size: 16px;
  line-height: 2;
  color: var(--text-light);
  margin-bottom: 22px;
  text-align: left;
}
.about-intro p:first-child { text-align: center; }
.about-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin: 60px auto 0;
  padding: 44px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  max-width: 980px;
}
.about-stat {
  text-align: center;
  padding: 10px;
}
.about-stat .num {
  font-size: 40px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
  letter-spacing: 0.02em;
  font-family: "Helvetica Neue", "Inter", sans-serif;
}
.about-stat .num .unit {
  font-size: 20px;
  color: var(--accent);
  margin-left: 4px;
}
.about-stat .lbl {
  margin-top: 10px;
  font-size: 14px;
  color: var(--text-light);
  letter-spacing: 0.06em;
}

/* ===== BUSINESS 页面 8 大业务 grid ===== */
.business-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  max-width: 1160px;
  margin: 0 auto;
}
.business-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 34px 24px;
  transition: var(--transition);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.business-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 3px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);
}
.business-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.business-card:hover::before { transform: scaleX(1); }
.business-icon {
  width: 52px;
  height: 52px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: var(--accent-light);
  transition: var(--transition);
}
.business-card:hover .business-icon {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
  color: #fff;
}
.business-icon svg { width: 26px; height: 26px; }
.business-card h3 {
  font-size: 16px;
  color: var(--primary);
  margin-bottom: 10px;
  letter-spacing: 0.02em;
  line-height: 1.4;
}
.business-card p {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text-light);
}

/* 康美板块单独高亮 */
.business-highlight {
  grid-column: span 4;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  padding: 44px 40px;
  border-radius: var(--radius-lg);
  margin-top: 24px;
  text-align: center;
}
.business-highlight .badge {
  display: inline-block;
  padding: 5px 14px;
  font-size: 11px;
  letter-spacing: 0.25em;
  background: rgba(212, 178, 131, 0.15);
  color: var(--accent-light);
  border-radius: 20px;
  margin-bottom: 16px;
}
.business-highlight h3 {
  color: #fff;
  font-size: 24px;
  margin-bottom: 14px;
  letter-spacing: 0.04em;
}
.business-highlight p {
  color: rgba(255, 255, 255, 0.88);
  font-size: 15px;
  max-width: 680px;
  margin: 0 auto 22px;
  line-height: 1.85;
}
.business-highlight .link-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 30px;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.1em;
  transition: var(--transition);
}
.business-highlight .link-more:hover {
  background: var(--accent-dark);
  color: #fff;
  transform: translateY(-2px);
}

/* ===== PROJECT 页面(康美)===== */
.project-intro {
  max-width: 860px;
  margin: 0 auto 50px;
  text-align: center;
}
.project-intro p {
  font-size: 16px;
  line-height: 2;
  color: var(--text-light);
  margin-bottom: 20px;
}
.project-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 1080px;
  margin: 0 auto 64px;
}
.metric-card {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  padding: 36px 22px;
  border-radius: var(--radius-lg);
  text-align: center;
  transition: var(--transition);
  border: 1px solid rgba(212, 178, 131, 0.2);
}
.metric-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}
.metric-value {
  font-size: 38px;
  color: var(--accent-light);
  font-weight: 700;
  line-height: 1;
  margin-bottom: 10px;
  letter-spacing: 0.02em;
  font-family: "Helvetica Neue", "Inter", sans-serif;
}
.metric-value .unit {
  font-size: 18px;
  color: var(--accent);
  margin-left: 2px;
}
.metric-label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.82);
  letter-spacing: 0.1em;
}

.project-stages {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  max-width: 1080px;
  margin: 0 auto;
}
.stage-card {
  background: #fff;
  border: 1px solid var(--border);
  border-top: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 30px 18px;
  text-align: center;
  transition: var(--transition);
}
.stage-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}
.stage-card .stage-num {
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin-bottom: 10px;
  font-weight: 600;
}
.stage-card h4 {
  font-size: 16px;
  color: var(--primary);
  margin-bottom: 8px;
  letter-spacing: 0.04em;
}
.stage-card p {
  font-size: 12.5px;
  color: var(--text-light);
  line-height: 1.6;
}

.project-image-wrap {
  max-width: 1080px;
  margin: 60px auto 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.project-image-wrap img {
  width: 100%;
  max-height: 420px;
  object-fit: cover;
  object-position: center;
}

/* ===== TIMELINE 发展历程 ===== */
.timeline {
  position: relative;
  max-width: 920px;
  margin: 0 auto;
  padding: 20px 0;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, transparent 0%, var(--accent) 15%, var(--accent) 85%, transparent 100%);
  transform: translateX(-50%);
}
.timeline-item {
  position: relative;
  margin-bottom: 56px;
  display: grid;
  grid-template-columns: 1fr 80px 1fr;
  align-items: center;
  gap: 0;
}
.timeline-item:last-child { margin-bottom: 0; }
.timeline-content {
  background: #fff;
  padding: 26px 28px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--border);
}
.timeline-content:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: var(--accent-light);
}
.timeline-item:nth-child(odd) .timeline-content {
  grid-column: 1;
  text-align: right;
}
.timeline-item:nth-child(even) .timeline-content {
  grid-column: 3;
  text-align: left;
}
.timeline-year {
  font-size: 22px;
  font-weight: 700;
  color: var(--accent);
  font-family: "Helvetica Neue", "Inter", sans-serif;
  margin-bottom: 8px;
  letter-spacing: 0.04em;
}
.timeline-content h4 {
  font-size: 17px;
  color: var(--primary);
  margin-bottom: 8px;
}
.timeline-content p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.75;
}
.timeline-dot {
  grid-column: 2;
  justify-self: center;
  position: relative;
  width: 18px;
  height: 18px;
  background: var(--bg);
  border: 3px solid var(--accent);
  border-radius: 50%;
  z-index: 2;
  transition: var(--transition);
}
.timeline-item:hover .timeline-dot {
  background: var(--accent);
  transform: scale(1.25);
  box-shadow: 0 0 0 8px rgba(184, 147, 90, 0.2);
}

/* ===== FOUNDER 页面 ===== */
.founder-wrap {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}
/* 人脸图铁律:完整显示,灰底留白,绝不裁切 */
.founder-photo {
  background: var(--bg-soft);
  border-radius: var(--radius-lg);
  overflow: hidden;
  padding: 28px 20px;
  margin-bottom: 36px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 420px;
}
.founder-photo img {
  max-width: 100%;
  max-height: 500px;
  width: auto;
  height: auto;
  object-fit: contain;
  object-position: center;
  display: block;
  margin: 0 auto;
  border-radius: var(--radius);
}
.founder-name {
  font-size: 38px;
  color: var(--primary);
  margin-bottom: 10px;
  letter-spacing: 0.08em;
}
.founder-title {
  font-size: 14px;
  color: var(--accent);
  letter-spacing: 0.25em;
  margin-bottom: 28px;
  text-transform: uppercase;
}
.founder-bio {
  max-width: 720px;
  margin: 0 auto;
  text-align: left;
}
.founder-bio p {
  font-size: 16px;
  line-height: 2;
  color: var(--text-light);
  margin-bottom: 20px;
}

/* ===== CONTACT 页面 ===== */
.contact-wrap {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}
.contact-block {
  padding: 40px 32px;
  margin-bottom: 28px;
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.contact-block:hover {
  box-shadow: var(--shadow);
  transform: translateY(-3px);
  border-color: var(--accent-light);
}
.contact-block .icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: var(--accent-light);
}
.contact-block .icon svg { width: 24px; height: 24px; }
.contact-block .label {
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--muted);
  margin-bottom: 12px;
  text-transform: uppercase;
}
.contact-block .value {
  font-size: 22px;
  color: var(--primary);
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.5;
  word-break: break-word;
}
.contact-block .value.small {
  font-size: 17px;
  font-weight: 500;
  line-height: 1.7;
}

/* ===== FOOTER (共用)===== */
.footer {
  background: var(--bg-dark);
  color: rgba(255, 255, 255, 0.78);
  padding: 56px 0 24px;
  text-align: center;
}
.footer-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 28px;
}
.footer-brand {
  margin-bottom: 28px;
}
.footer-logo {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  line-height: 1;
  padding: 8px 14px;
  border-left: 2px solid var(--accent);
  margin-bottom: 16px;
}
.footer-logo .logo-img-light {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  margin-bottom: 8px;
  object-fit: contain;
}
.footer-logo .logo-cn {
  font-size: 18px;
  color: #fff;
  font-weight: 700;
  letter-spacing: 0.08em;
}
.footer-logo .logo-en {
  font-size: 10px;
  color: var(--accent);
  letter-spacing: 0.25em;
  margin-top: 4px;
}
.footer-brand .brand-full {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.88);
  font-weight: 500;
  margin-bottom: 8px;
}
.footer-contact {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 20px 36px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 28px;
  line-height: 1.7;
}
.footer-contact .item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.footer-contact svg {
  width: 14px;
  height: 14px;
  color: var(--accent);
  flex-shrink: 0;
}
.footer-bottom {
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: 0.05em;
  text-align: center;
}

/* ===== FOOTER 三列布局 (2026-04-22 补) ===== */
.footer {
  text-align: left;
}
.footer-cols {
  display: grid;
  grid-template-columns: 1.2fr 1.4fr 1fr;
  gap: 48px;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 22px;
}
.footer-col h5 {
  font-size: 14px;
  color: #fff;
  font-weight: 600;
  letter-spacing: 0.1em;
  margin: 0 0 16px 0;
  padding-bottom: 10px;
  border-left: 2px solid var(--accent);
  padding-left: 10px;
}
.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-col-contact ul li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.65;
}
.footer-col-contact ul li svg {
  width: 15px;
  height: 15px;
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 3px;
}
.footer-col-links ul li {
  margin-bottom: 10px;
}
.footer-col-links ul li a {
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.72);
  text-decoration: none;
  transition: color 0.2s;
  display: inline-block;
  padding: 2px 0;
}
.footer-col-links ul li a:hover {
  color: var(--accent);
}
.footer-col-brand .footer-logo {
  margin-bottom: 16px;
}
.footer-col-brand .brand-full {
  font-size: 14.5px;
  color: rgba(255, 255, 255, 0.88);
  font-weight: 500;
  margin-bottom: 6px;
}
.footer-col-brand .brand-tag {
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: 0.08em;
}

@media (max-width: 768px) {
  .footer-cols {
    grid-template-columns: 1fr;
    gap: 28px;
    text-align: center;
  }
  .footer-col h5 {
    border-left: none;
    padding-left: 0;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
  .footer-col-contact ul li {
    justify-content: center;
  }
}

/* ===== FADE-IN 动画 =====
   默认可见(JS 未加载时内容不隐藏 · 无障碍 + headless 截屏友好)
   有 .js 类时 JS 会动态添加 .fade-init 触发真正的动画 */
.fade-up {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
html.js .fade-up:not(.visible) {
  opacity: 0;
  transform: translateY(30px);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .container { padding: 0 24px; }
  .hero h1 { font-size: 42px; }
  .hero-sub { font-size: 17px; }
  .section-head h2 { font-size: 30px; }
  .index-cards { grid-template-columns: repeat(2, 1fr); }
  .business-grid { grid-template-columns: repeat(2, 1fr); }
  .business-highlight { grid-column: span 2; }
  .about-stats { grid-template-columns: repeat(2, 1fr); }
  .project-metrics { grid-template-columns: repeat(2, 1fr); }
  .project-stages { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  body { font-size: 14.5px; }
  .nav-inner { padding: 0 20px; }
  .nav-menu {
    position: fixed;
    top: 72px; left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    padding: 16px 0;
    box-shadow: var(--shadow);
    transform: translateY(-140%);
    transition: var(--transition);
    gap: 0;
    border-top: 1px solid var(--border);
  }
  .nav-menu.active { transform: translateY(0); }
  .nav-menu li { width: 100%; }
  .nav-menu a {
    padding: 14px 28px;
    border-bottom: 1px solid var(--border);
    text-align: center;
  }
  .nav-menu a::after { display: none; }
  .nav-toggle { display: flex; }
  .nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
  .nav-toggle.active span:nth-child(2) { opacity: 0; }
  .nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(7px, -7px); }
  .nav-search { display: none; }
  .nav-search-toggle { display: flex; }
  .nav-right { gap: 4px; }

  .hero { padding: 130px 0 72px; min-height: auto; }
  .hero h1 { font-size: 32px; line-height: 1.3; }
  .hero-sub { font-size: 15.5px; }
  .hero-stats { gap: 32px; }
  .hero-stat .num { font-size: 24px; }

  .page-hero { padding: 110px 0 40px; }
  .page-hero h1 { font-size: 28px; }

  .section { padding: 60px 0; }
  .section-head { margin-bottom: 40px; }
  .section-head h2 { font-size: 24px; }

  .index-cards { grid-template-columns: 1fr; gap: 18px; }
  .about-stats { grid-template-columns: 1fr 1fr; gap: 16px; padding: 28px 0; }
  .about-stat .num { font-size: 30px; }
  .business-grid { grid-template-columns: 1fr; gap: 16px; }
  .business-highlight { grid-column: span 1; padding: 32px 24px; }
  .business-highlight h3 { font-size: 20px; }

  .project-metrics { grid-template-columns: 1fr 1fr; gap: 12px; }
  .metric-value { font-size: 28px; }
  .project-stages { grid-template-columns: 1fr; }

  .timeline::before { left: 20px; }
  .timeline-item {
    grid-template-columns: 40px 1fr;
    gap: 20px;
    margin-bottom: 40px;
  }
  .timeline-item .timeline-content,
  .timeline-item:nth-child(odd) .timeline-content,
  .timeline-item:nth-child(even) .timeline-content {
    grid-column: 2;
    text-align: left;
  }
  .timeline-dot { grid-column: 1; justify-self: start; margin-left: 11px; }

  .founder-photo { min-height: 320px; padding: 20px 14px; }
  .founder-photo img { max-height: 380px; }
  .founder-name { font-size: 28px; }

  .contact-block { padding: 32px 22px; }
  .contact-block .value { font-size: 18px; }
  .contact-block .value.small { font-size: 15px; }

  .footer-contact { flex-direction: column; gap: 12px; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 26px; }
  .section-head h2 { font-size: 20px; }
  .page-hero h1 { font-size: 24px; }
  .project-metrics { grid-template-columns: 1fr; }
  .metric-value { font-size: 32px; }
  .founder-photo img { max-height: 320px; }
  .founder-name { font-size: 24px; }
  .contact-block .value { font-size: 16px; }
}