/* ==========================================================================
   德明钢材 · 闽亿源钢铁 — 集团官网样式
   风格：工业硬朗（钢灰深蓝 + 橙红点缀）
   ========================================================================== */

:root {
  /* 主色：深钢蓝 */
  --c-primary: #0f2942;
  --c-primary-dark: #081a2c;
  --c-primary-light: #1a3d5c;
  /* 强调色：橙红（钢铁高温色） */
  --c-accent: #e85a1f;
  --c-accent-hover: #ff7a3d;
  --c-accent-soft: rgba(232, 90, 31, 0.12);
  /* 中性色 */
  --c-steel: #4a5560;
  --c-steel-light: #8b95a1;
  --c-line: #d9dee5;
  --c-bg: #f5f6f8;
  --c-bg-alt: #eceef2;
  --c-white: #ffffff;
  --c-text: #1c2530;
  --c-text-muted: #5c6773;
  /* 尺寸 */
  --container: 1240px;
  --header-h: 78px;
  --radius: 2px; /* 硬朗风：几乎不用圆角 */
  --shadow-sm: 0 2px 8px rgba(15, 41, 66, 0.06);
  --shadow-md: 0 6px 24px rgba(15, 41, 66, 0.10);
  --shadow-lg: 0 18px 48px rgba(15, 41, 66, 0.16);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Source Han Sans CN",
               -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-text);
  background: var(--c-white);
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* 章节通用 */
.section { padding: 88px 0; }
.section-alt { background: var(--c-bg); }
.section-dark { background: var(--c-primary); color: var(--c-white); }

.section-head { margin-bottom: 52px; }
.section-head .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 3px;
  color: var(--c-accent);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.section-head .eyebrow::before {
  content: "";
  width: 32px;
  height: 2px;
  background: var(--c-accent);
}
.section-head h2 {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: 1px;
  color: var(--c-primary);
  line-height: 1.25;
}
.section-dark .section-head h2 { color: var(--c-white); }
.section-head p.desc {
  margin-top: 14px;
  color: var(--c-text-muted);
  max-width: 720px;
  font-size: 15px;
}
.section-dark .section-head p.desc { color: rgba(255,255,255,0.72); }

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--c-line);
  z-index: 1000;
  transition: box-shadow var(--transition), background var(--transition);
}
.site-header.scrolled {
  box-shadow: var(--shadow-sm);
  background: rgba(255, 255, 255, 0.99);
}
.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

/* 双品牌 Logo */
.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}
.brand-mark {
  width: 46px; height: 46px;
  background: var(--c-primary);
  color: var(--c-white);
  display: grid;
  place-items: center;
  font-weight: 900;
  font-size: 20px;
  letter-spacing: -1px;
  position: relative;
  clip-path: polygon(0 0, 100% 0, 100% 78%, 78% 100%, 0 100%);
}
.brand-mark::after {
  content: "";
  position: absolute;
  right: 0; bottom: 0;
  width: 12px; height: 12px;
  background: var(--c-accent);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
}
.brand-text { line-height: 1.15; }
.brand-text .zh {
  font-size: 17px;
  font-weight: 800;
  color: var(--c-primary);
  letter-spacing: 1px;
}
.brand-text .zh .sep { color: var(--c-accent); margin: 0 4px; font-weight: 400; }
.brand-text .en {
  font-size: 10px;
  color: var(--c-steel-light);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-top: 3px;
}

/* 主导航 */
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  position: relative;
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--c-steel);
  transition: color var(--transition);
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 16px; right: 16px; bottom: 4px;
  height: 2px;
  background: var(--c-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.main-nav a:hover { color: var(--c-primary); }
.main-nav a:hover::after,
.main-nav a.active::after { transform: scaleX(1); }
.main-nav a.active { color: var(--c-primary); font-weight: 700; }

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--c-accent);
  color: var(--c-white) !important;
  font-weight: 600;
  font-size: 14px;
  clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
  transition: background var(--transition);
}
.header-cta:hover { background: var(--c-accent-hover); }
.header-cta svg { width: 14px; height: 14px; }

/* 移动端菜单按钮 */
.menu-toggle {
  display: none;
  width: 40px; height: 40px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.menu-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--c-primary);
  transition: transform var(--transition), opacity var(--transition);
}
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 640px;
  padding-top: var(--header-h);
  display: flex;
  align-items: center;
  color: var(--c-white);
  overflow: hidden;
  isolation: isolate;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  background-size: cover;
  background-position: center;
  transform: scale(1.02);
}
.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    100deg,
    rgba(8, 26, 44, 0.94) 0%,
    rgba(15, 41, 66, 0.82) 40%,
    rgba(15, 41, 66, 0.55) 100%
  );
}
.hero-inner {
  position: relative;
  z-index: 1;
  padding: 100px 0 90px;
  max-width: 800px;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 8px 18px;
  background: rgba(232, 90, 31, 0.16);
  border-left: 3px solid var(--c-accent);
  color: #ffb994;
  font-size: 13px;
  letter-spacing: 3px;
  font-weight: 600;
  margin-bottom: 26px;
}
.hero h1 {
  font-size: clamp(34px, 5.2vw, 58px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: 2px;
  margin-bottom: 22px;
}
.hero h1 .highlight { color: var(--c-accent-hover); }
.hero p.lead {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.86);
  max-width: 640px;
  margin-bottom: 40px;
  line-height: 1.85;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 34px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 1px;
  border: 2px solid transparent;
  transition: all var(--transition);
  cursor: pointer;
  clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
}
.btn svg { width: 16px; height: 16px; }
.btn-primary { background: var(--c-accent); color: var(--c-white); }
.btn-primary:hover { background: var(--c-accent-hover); transform: translateY(-2px); }
.btn-outline { border-color: rgba(255, 255, 255, 0.55); color: var(--c-white); }
.btn-outline:hover { background: var(--c-white); color: var(--c-primary); border-color: var(--c-white); }
.btn-dark { background: var(--c-primary); color: var(--c-white); }
.btn-dark:hover { background: var(--c-primary-light); }

/* Hero 数据条 */
.hero-stats {
  position: relative;
  z-index: 1;
  background: rgba(8, 26, 44, 0.72);
  backdrop-filter: blur(10px);
  border-top: 1px solid rgba(255,255,255,0.1);
}
.hero-stats-inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.stat-cell {
  padding: 28px 24px;
  text-align: center;
  border-right: 1px solid rgba(255,255,255,0.1);
  color: var(--c-white);
}
.stat-cell:last-child { border-right: none; }
.stat-cell .num {
  font-size: 34px;
  font-weight: 900;
  color: var(--c-accent-hover);
  letter-spacing: 1px;
  line-height: 1;
  font-family: "DIN Alternate", "Oswald", "PingFang SC", sans-serif;
}
.stat-cell .num sup { font-size: 15px; margin-left: 3px; font-weight: 700; }
.stat-cell .label {
  margin-top: 8px;
  font-size: 13px;
  color: rgba(255,255,255,0.75);
  letter-spacing: 1px;
}

/* 内页 Hero（较小） */
.page-hero {
  padding-top: var(--header-h);
  min-height: 340px;
  display: flex;
  align-items: center;
  position: relative;
  color: var(--c-white);
  background: var(--c-primary);
  overflow: hidden;
}
.page-hero-bg {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.24;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(8,26,44,0.85) 0%, rgba(15,41,66,0.55) 100%);
}
.page-hero-inner {
  position: relative;
  z-index: 1;
  padding: 60px 0;
}
.page-hero h1 {
  font-size: 42px;
  font-weight: 800;
  letter-spacing: 3px;
  margin-bottom: 10px;
}
.breadcrumb {
  display: flex;
  gap: 10px;
  align-items: center;
  font-size: 13px;
  color: rgba(255,255,255,0.7);
  letter-spacing: 1px;
}
.breadcrumb a:hover { color: var(--c-accent-hover); }
.breadcrumb .sep { color: var(--c-accent); }

/* ---------- 三大成员企业卡片 ---------- */
.brands-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.brand-card {
  background: var(--c-white);
  border: 1px solid var(--c-line);
  border-top: 4px solid var(--c-primary);
  padding: 32px 28px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.brand-card.accent { border-top-color: var(--c-accent); }
.brand-card.steel { border-top-color: var(--c-steel); }
.brand-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--c-primary);
}
.brand-card.accent:hover { border-color: var(--c-accent); }
.brand-card.steel:hover { border-color: var(--c-steel); }
.brand-card .card-tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--c-primary);
  color: var(--c-white);
  font-size: 11px;
  letter-spacing: 2px;
  font-weight: 600;
  margin-bottom: 16px;
  align-self: flex-start;
}
.brand-card.accent .card-tag { background: var(--c-accent); }
.brand-card.steel .card-tag { background: var(--c-steel); }
.brand-card h3 {
  font-size: 21px;
  font-weight: 800;
  color: var(--c-primary);
  margin-bottom: 6px;
  letter-spacing: 0.5px;
  line-height: 1.35;
}
.brand-card .en-name {
  font-size: 11px;
  color: var(--c-steel-light);
  letter-spacing: 1.2px;
  text-transform: uppercase;
  margin-bottom: 18px;
  line-height: 1.5;
}
.brand-card p { color: var(--c-text-muted); font-size: 13.5px; line-height: 1.8; margin-bottom: 20px; flex: 1; }
.brand-card ul.meta { border-top: 1px dashed var(--c-line); padding-top: 16px; }
.brand-card ul.meta li {
  display: flex;
  gap: 10px;
  padding: 5px 0;
  font-size: 13px;
  color: var(--c-steel);
  line-height: 1.6;
}
.brand-card ul.meta li strong {
  color: var(--c-primary);
  font-weight: 600;
  min-width: 68px;
  flex-shrink: 0;
}
.brand-card ul.meta li .val { word-break: break-all; }

/* 集团架构示意条 */
.group-arch {
  background: var(--c-white);
  border: 1px solid var(--c-line);
  padding: 36px 40px;
  margin-bottom: 40px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 40px;
  align-items: center;
}
.group-arch .arch-badge {
  padding: 22px 26px;
  background: var(--c-primary);
  color: var(--c-white);
  text-align: center;
  clip-path: polygon(0 0, 100% 0, 100% 88%, 88% 100%, 0 100%);
  min-width: 180px;
}
.group-arch .arch-badge .yr {
  font-size: 34px;
  font-weight: 900;
  color: var(--c-accent-hover);
  letter-spacing: 1px;
  line-height: 1;
}
.group-arch .arch-badge .yr sup { font-size: 14px; margin-left: 2px; }
.group-arch .arch-badge .txt {
  font-size: 12px;
  letter-spacing: 3px;
  margin-top: 8px;
  color: rgba(255,255,255,0.75);
}
.group-arch .arch-desc { font-size: 14.5px; color: var(--c-text-muted); line-height: 1.9; }
.group-arch .arch-desc strong { color: var(--c-primary); font-weight: 700; }

/* ---------- 业务/优势卡片 ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

.feature-card {
  background: var(--c-white);
  padding: 34px 28px;
  border: 1px solid var(--c-line);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--c-accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition);
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: transparent; }
.feature-card:hover::before { transform: scaleY(1); }
.feature-icon {
  width: 54px; height: 54px;
  background: var(--c-accent-soft);
  color: var(--c-accent);
  display: grid;
  place-items: center;
  margin-bottom: 22px;
  clip-path: polygon(0 0, 100% 0, 100% 78%, 78% 100%, 0 100%);
}
.feature-icon svg { width: 26px; height: 26px; }
.feature-card h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--c-primary);
  margin-bottom: 10px;
  letter-spacing: 0.5px;
}
.feature-card p { font-size: 14px; color: var(--c-text-muted); line-height: 1.8; }

/* ---------- 产品分类 ---------- */
.product-card {
  background: var(--c-white);
  border: 1px solid var(--c-line);
  overflow: hidden;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--c-accent); }
.product-thumb {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--c-bg-alt);
}
.product-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.product-card:hover .product-thumb img { transform: scale(1.06); }
.product-badge {
  position: absolute;
  left: 0; top: 16px;
  padding: 5px 14px 5px 12px;
  background: var(--c-accent);
  color: var(--c-white);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  clip-path: polygon(0 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}
.product-body { padding: 22px 22px 24px; flex: 1; display: flex; flex-direction: column; }
.product-body h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--c-primary);
  margin-bottom: 8px;
}
.product-body .spec {
  font-size: 13px;
  color: var(--c-steel-light);
  margin-bottom: 14px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--c-line);
}
.product-body p { font-size: 13.5px; color: var(--c-text-muted); line-height: 1.75; flex: 1; }
.product-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  color: var(--c-accent);
  font-size: 13px;
  font-weight: 600;
}
.product-link:hover { gap: 10px; }

/* ---------- 图廊 ---------- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.gallery-item {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  cursor: pointer;
  background: var(--c-primary);
}
.gallery-item img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease, opacity var(--transition);
}
.gallery-item::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(8,26,44,0.85) 0%, transparent 55%);
  opacity: 0;
  transition: opacity var(--transition);
}
.gallery-item .caption {
  position: absolute;
  left: 20px; right: 20px; bottom: 18px;
  color: var(--c-white);
  transform: translateY(12px);
  opacity: 0;
  transition: all var(--transition);
  z-index: 2;
}
.gallery-item .caption h5 { font-size: 16px; font-weight: 700; letter-spacing: 1px; margin-bottom: 4px; }
.gallery-item .caption span { font-size: 12px; color: rgba(255,255,255,0.75); letter-spacing: 1px; }
.gallery-item:hover img { transform: scale(1.08); opacity: 0.7; }
.gallery-item:hover::after,
.gallery-item:hover .caption { opacity: 1; transform: translateY(0); }

/* ---------- 数据/合作 ---------- */
.partner-strip {
  background: var(--c-primary);
  color: var(--c-white);
  padding: 60px 0;
  position: relative;
  overflow: hidden;
}
.partner-strip::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(45deg, rgba(232,90,31,0.06) 0 20px, transparent 20px 40px);
}
.partner-inner { position: relative; z-index: 1; }
.partner-title {
  text-align: center;
  font-size: 14px;
  letter-spacing: 4px;
  color: rgba(255,255,255,0.65);
  margin-bottom: 32px;
}
.partner-title strong { color: var(--c-accent-hover); font-weight: 700; }
.partner-list {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 20px;
  align-items: center;
}
.partner-item {
  padding: 18px 10px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  text-align: center;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 2px;
  color: rgba(255,255,255,0.85);
  transition: all var(--transition);
}
.partner-item:hover {
  background: rgba(232,90,31,0.16);
  border-color: var(--c-accent);
  color: var(--c-white);
  transform: translateY(-2px);
}

/* ---------- 时间线 ---------- */
.timeline {
  position: relative;
  padding-left: 40px;
  border-left: 2px solid var(--c-line);
}
.timeline-item { position: relative; padding-bottom: 36px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: -49px; top: 6px;
  width: 16px; height: 16px;
  background: var(--c-white);
  border: 3px solid var(--c-accent);
  border-radius: 50%;
}
.timeline-year {
  display: inline-block;
  padding: 4px 14px;
  background: var(--c-primary);
  color: var(--c-white);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 2px;
  margin-bottom: 10px;
}
.timeline-item h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--c-primary);
  margin-bottom: 6px;
}
.timeline-item p { font-size: 14px; color: var(--c-text-muted); line-height: 1.8; }

/* ---------- 新闻 ---------- */
.news-list { display: grid; gap: 20px; }
.news-item {
  display: grid;
  grid-template-columns: 120px 1fr auto;
  gap: 28px;
  align-items: center;
  padding: 24px 28px;
  background: var(--c-white);
  border: 1px solid var(--c-line);
  border-left: 3px solid transparent;
  transition: all var(--transition);
}
.news-item:hover {
  border-left-color: var(--c-accent);
  box-shadow: var(--shadow-sm);
  transform: translateX(4px);
}
.news-date {
  text-align: center;
  padding: 12px 8px;
  background: var(--c-bg);
  border: 1px solid var(--c-line);
}
.news-date .day {
  font-size: 28px;
  font-weight: 900;
  color: var(--c-primary);
  line-height: 1;
}
.news-date .ym { font-size: 12px; color: var(--c-steel-light); margin-top: 4px; letter-spacing: 1px; }
.news-body h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--c-primary);
  margin-bottom: 8px;
  line-height: 1.5;
}
.news-body h4 a:hover { color: var(--c-accent); }
.news-body .excerpt { font-size: 13.5px; color: var(--c-text-muted); line-height: 1.75; }
.news-meta {
  display: flex;
  gap: 14px;
  font-size: 12px;
  color: var(--c-steel-light);
  margin-top: 8px;
  letter-spacing: 1px;
}
.news-meta .tag {
  padding: 2px 10px;
  background: var(--c-accent-soft);
  color: var(--c-accent);
  font-weight: 600;
}
.news-arrow { color: var(--c-steel-light); font-size: 22px; transition: all var(--transition); }
.news-item:hover .news-arrow { color: var(--c-accent); transform: translateX(4px); }

/* ---------- CTA 横幅 ---------- */
.cta-band {
  background: linear-gradient(120deg, var(--c-primary) 0%, var(--c-primary-light) 100%);
  color: var(--c-white);
  padding: 64px 0;
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: "";
  position: absolute;
  right: -100px; top: -100px;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(232,90,31,0.35) 0%, transparent 70%);
}
.cta-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}
.cta-inner h3 {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: 2px;
  margin-bottom: 8px;
}
.cta-inner p { color: rgba(255,255,255,0.78); font-size: 15px; }
.cta-phone {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 22px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.2);
}
.cta-phone .icon {
  width: 40px; height: 40px;
  background: var(--c-accent);
  display: grid; place-items: center;
  clip-path: polygon(0 0, 100% 0, 100% 78%, 78% 100%, 0 100%);
}
.cta-phone .icon svg { width: 20px; height: 20px; color: var(--c-white); }
.cta-phone .txt { font-size: 12px; color: rgba(255,255,255,0.7); letter-spacing: 2px; }
.cta-phone .num { font-size: 22px; font-weight: 800; letter-spacing: 1px; color: var(--c-white); }

/* ---------- 联系 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}
.contact-card {
  background: var(--c-white);
  border: 1px solid var(--c-line);
  padding: 32px;
  position: relative;
}
.contact-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 60px; height: 4px;
  background: var(--c-accent);
}
.contact-card h4 {
  font-size: 20px;
  font-weight: 800;
  color: var(--c-primary);
  margin-bottom: 4px;
  letter-spacing: 1px;
}
.contact-card .sub {
  font-size: 12px;
  color: var(--c-steel-light);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 22px;
}
.contact-list li {
  display: flex;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--c-line);
  font-size: 14px;
}
.contact-list li:last-child { border-bottom: none; }
.contact-list .ico {
  width: 32px; height: 32px;
  background: var(--c-accent-soft);
  color: var(--c-accent);
  display: grid; place-items: center;
  flex-shrink: 0;
}
.contact-list .ico svg { width: 15px; height: 15px; }
.contact-list .lbl { color: var(--c-steel-light); font-size: 12px; letter-spacing: 1px; display: block; margin-bottom: 2px; }
.contact-list .val { color: var(--c-text); font-weight: 500; word-break: break-all; }

/* 留言表单 */
.form-panel {
  background: var(--c-bg);
  padding: 36px;
  border: 1px solid var(--c-line);
}
.form-panel h4 {
  font-size: 20px;
  font-weight: 800;
  color: var(--c-primary);
  margin-bottom: 6px;
}
.form-panel .sub { font-size: 13px; color: var(--c-text-muted); margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-field { margin-bottom: 16px; }
.form-field label {
  display: block;
  font-size: 13px;
  color: var(--c-steel);
  margin-bottom: 6px;
  font-weight: 600;
  letter-spacing: 1px;
}
.form-field label .req { color: var(--c-accent); }
.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--c-line);
  background: var(--c-white);
  font-size: 14px;
  font-family: inherit;
  color: var(--c-text);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--c-accent);
  box-shadow: 0 0 0 3px var(--c-accent-soft);
}
.form-field textarea { resize: vertical; min-height: 110px; }
.form-msg {
  padding: 12px 16px;
  margin-top: 12px;
  font-size: 14px;
  border-left: 3px solid;
  display: none;
}
.form-msg.success { background: #eaf7ee; color: #1e7a3a; border-color: #2ea44f; display: block; }
.form-msg.error { background: #fdecea; color: #a02622; border-color: #d94848; display: block; }

/* 地图占位 */
.map-frame {
  height: 340px;
  background: var(--c-bg-alt);
  border: 1px solid var(--c-line);
  display: grid;
  place-items: center;
  color: var(--c-steel-light);
  font-size: 13px;
  letter-spacing: 2px;
  position: relative;
  overflow: hidden;
}
.map-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(74,85,96,0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74,85,96,0.1) 1px, transparent 1px);
  background-size: 32px 32px;
}
.map-frame .pin {
  position: relative;
  z-index: 1;
  text-align: center;
}
.map-frame .pin svg { width: 40px; height: 40px; color: var(--c-accent); margin-bottom: 10px; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--c-primary-dark);
  color: rgba(255,255,255,0.7);
  padding: 64px 0 0;
  font-size: 14px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(255,255,255,0.09);
}
.footer-col h5 {
  color: var(--c-white);
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: 2px;
  position: relative;
  padding-bottom: 12px;
}
.footer-col h5::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 26px; height: 2px;
  background: var(--c-accent);
}
.footer-col p { line-height: 1.9; margin-bottom: 8px; }
.footer-col ul li { padding: 5px 0; }
.footer-col a:hover { color: var(--c-accent-hover); }
.footer-brand .brand-text .zh { color: var(--c-white); }
.footer-brand .brand-text .en { color: rgba(255,255,255,0.4); }
.footer-brand .brand-mark { background: var(--c-accent); }
.footer-brand > p {
  margin-top: 20px;
  color: rgba(255,255,255,0.6);
  font-size: 13px;
  line-height: 1.9;
}
.footer-contact li {
  display: flex;
  gap: 10px;
  padding: 6px 0;
  color: rgba(255,255,255,0.72);
  font-size: 13.5px;
}
.footer-contact li svg {
  width: 15px; height: 15px;
  color: var(--c-accent);
  flex-shrink: 0;
  margin-top: 4px;
}
.footer-bottom {
  padding: 22px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 12.5px;
  color: rgba(255,255,255,0.5);
  letter-spacing: 0.5px;
}
.footer-bottom .icp {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.footer-bottom .icp a:hover { color: var(--c-accent-hover); }

/* 返回顶部 */
.back-to-top {
  position: fixed;
  right: 24px; bottom: 32px;
  width: 46px; height: 46px;
  background: var(--c-primary);
  color: var(--c-white);
  display: grid;
  place-items: center;
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition);
  clip-path: polygon(0 0, 100% 0, 100% 78%, 78% 100%, 0 100%);
}
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--c-accent); }
.back-to-top svg { width: 18px; height: 18px; }

/* 侧边悬浮联系条 */
.float-contact {
  position: fixed;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 998;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.float-contact a {
  display: flex;
  align-items: center;
  gap: 0;
  background: var(--c-primary);
  color: var(--c-white);
  padding: 12px 10px;
  writing-mode: vertical-rl;
  font-size: 13px;
  letter-spacing: 3px;
  transition: background var(--transition);
}
.float-contact a:hover { background: var(--c-accent); }
.float-contact a.phone { background: var(--c-accent); }
.float-contact a.phone:hover { background: var(--c-accent-hover); }

/* 淡入动画 */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.in { opacity: 1; transform: translateY(0); }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .brands-grid { grid-template-columns: 1fr; gap: 20px; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .partner-list { grid-template-columns: repeat(4, 1fr); }
  .hero-stats-inner { grid-template-columns: repeat(2, 1fr); }
  .stat-cell:nth-child(2) { border-right: none; }
  .stat-cell:nth-child(1), .stat-cell:nth-child(2) { border-bottom: 1px solid rgba(255,255,255,0.1); }
  .group-arch { grid-template-columns: 1fr; gap: 24px; padding: 28px 24px; }
  .group-arch .arch-badge { min-width: 0; }
}

@media (max-width: 820px) {
  :root { --header-h: 66px; }
  .section { padding: 64px 0; }
  .section-head h2 { font-size: 28px; }
  .page-hero h1 { font-size: 30px; letter-spacing: 2px; }
  .brands-grid, .contact-grid { grid-template-columns: 1fr; }
  .news-item { grid-template-columns: 80px 1fr; gap: 16px; padding: 18px; }
  .news-arrow { display: none; }
  .cta-inner { flex-direction: column; align-items: flex-start; }
  .cta-inner h3 { font-size: 22px; }
  .form-row { grid-template-columns: 1fr; }
  .float-contact { display: none; }

  /* 汉堡菜单 */
  .menu-toggle { display: flex; }
  .header-cta { display: none; }
  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    background: var(--c-white);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 20px 24px;
    gap: 0;
    border-bottom: 1px solid var(--c-line);
    box-shadow: var(--shadow-md);
    transform: translateY(-140%);
    transition: transform 0.35s ease;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
  }
  .main-nav.open { transform: translateY(0); }
  .main-nav a {
    padding: 14px 8px;
    border-bottom: 1px solid var(--c-line);
    font-size: 15px;
  }
  .main-nav a::after { display: none; }
  .main-nav a.active { color: var(--c-accent); }

  .grid-4, .grid-3, .gallery-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .partner-list { grid-template-columns: repeat(2, 1fr); }
  .hero-inner { padding: 60px 0 50px; }
  .hero h1 { font-size: 30px; letter-spacing: 1px; }
  .hero p.lead { font-size: 15px; }
  .btn { padding: 13px 24px; font-size: 14px; }
  .footer-bottom { flex-direction: column; text-align: center; gap: 8px; }
}