/* ============================================================
   浦江气体官网 · 设计系统 v1.0
   风格：现代化 / 高级 / 简约克制（参考国际气体巨头官网）
   配色：深海军蓝 + 科技蓝 + 白
   ============================================================ */

:root {
  /* 主色 */
  --navy-900: #071f38;
  --navy-800: #0b2a4a;
  --navy-700: #12375f;
  --navy-600: #1a4674;

  /* 强调色 */
  --blue-500: #0091ff;
  --blue-400: #3da9ff;
  --cyan-400: #00c2a8;

  /* 中性色 */
  --white: #ffffff;
  --gray-50: #f6f8fb;
  --gray-100: #eef1f6;
  --gray-200: #e2e7ef;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-900: #0f172a;

  /* 字体 */
  --font-sans: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei",
    "Noto Sans SC", "Source Han Sans SC", -apple-system, "Segoe UI", sans-serif;

  /* 圆角 / 阴影 */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 1px 3px rgba(7, 31, 56, 0.06), 0 1px 2px rgba(7, 31, 56, 0.04);
  --shadow-md: 0 8px 24px rgba(7, 31, 56, 0.08), 0 2px 6px rgba(7, 31, 56, 0.05);
  --shadow-lg: 0 24px 60px rgba(7, 31, 56, 0.12);

  /* 布局 */
  --container: 1200px;
  --section-pad: 112px;
}

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

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

body {
  font-family: var(--font-sans);
  color: var(--gray-700);
  background: var(--white);
  line-height: 1.75;
  font-size: 16px;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

ul,
ol {
  list-style: none;
}

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

::selection {
  background: rgba(0, 145, 255, 0.18);
  color: var(--navy-900);
}

/* ---------- Container / Layout ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: var(--section-pad) 0;
}

.section--gray {
  background: var(--gray-50);
}

.section--navy {
  background: var(--navy-900);
  color: var(--gray-200);
}

/* ---------- 区块头 ---------- */
.section-head {
  max-width: 640px;
  margin-bottom: 64px;
}

.section-head--center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--blue-500);
  margin-bottom: 18px;
}

.eyebrow::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--blue-500);
  border-radius: 2px;
}

.section-head--center .eyebrow::after {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--blue-500);
  border-radius: 2px;
}

.section-title {
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 700;
  line-height: 1.25;
  color: var(--navy-900);
  letter-spacing: 0.01em;
}

.section--navy .section-title {
  color: var(--white);
}

.section-desc {
  margin-top: 18px;
  font-size: 17px;
  color: var(--gray-500);
  line-height: 1.85;
}

.section--navy .section-desc {
  color: var(--gray-300);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 32px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 999px;
  transition: all 0.3s ease;
  cursor: pointer;
  white-space: nowrap;
}

.btn--primary {
  background: var(--blue-500);
  color: #fff;
  box-shadow: 0 4px 16px rgba(0, 145, 255, 0.3);
}

.btn--primary:hover {
  background: #0076d6;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 145, 255, 0.38);
}

.btn--ghost {
  border: 1.5px solid rgba(255, 255, 255, 0.55);
  color: #fff;
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
}

.btn--outline {
  border: 1.5px solid var(--gray-300);
  color: var(--navy-800);
  background: transparent;
}

.btn--outline:hover {
  border-color: var(--blue-500);
  color: var(--blue-500);
  background: rgba(0, 145, 255, 0.05);
}

.btn .arrow {
  transition: transform 0.3s ease;
}

.btn:hover .arrow {
  transform: translateX(4px);
}

/* ---------- 顶部导航 ---------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: transparent;
  transition: all 0.35s ease;
}

.header.is-scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 rgba(7, 31, 56, 0.06), 0 8px 30px rgba(7, 31, 56, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
}

.header.is-scrolled .brand {
  color: var(--navy-900);
}

.brand-logo {
  display: flex;
  align-items: center;
  height: 46px;
  line-height: 0;
}

.brand-logo img {
  height: 100%;
  width: auto;
  display: block;
}

/* 深/浅色 logo 切换：默认(深蓝背景)显示白色版，滚动后(白底)显示深色版 */
.brand-logo .logo-dark { display: none; }
.header.is-scrolled .brand-logo .logo-dark { display: block; }
.header.is-scrolled .brand-logo .logo-light { display: none; }

.brand-name {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.2;
}

.brand-sub {
  display: block;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.34em;
  opacity: 0.72;
  text-transform: uppercase;
}

.nav {
  display: flex;
  align-items: center;
  gap: 38px;
}

.nav-link {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.88);
  padding: 8px 0;
}

.header.is-scrolled .nav-link {
  color: var(--gray-600);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--blue-500);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
}

.nav-link:hover,
.nav-link.active {
  color: #fff;
}

.header.is-scrolled .nav-link:hover,
.header.is-scrolled .nav-link.active {
  color: var(--navy-900);
}

.nav-cta {
  margin-left: 8px;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  color: var(--white);
}

.header.is-scrolled .nav-toggle {
  color: var(--navy-900);
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  margin: 2.5px 0;
  transition: all 0.3s ease;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  color: #fff;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(60% 80% at 78% 20%, rgba(0, 145, 255, 0.28) 0%, transparent 60%),
    radial-gradient(50% 60% at 15% 85%, rgba(0, 194, 168, 0.16) 0%, transparent 55%),
    linear-gradient(135deg, #071f38 0%, #0b2a4a 45%, #12375f 100%);
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(rgba(255, 255, 255, 0.14) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: radial-gradient(70% 70% at 50% 40%, #000 0%, transparent 100%);
  -webkit-mask-image: radial-gradient(70% 70% at 50% 40%, #000 0%, transparent 100%);
  opacity: 0.35;
}

/* 流动线条装饰 */
.hero-lines {
  position: absolute;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  opacity: 0.5;
}

.hero-lines svg {
  position: absolute;
  right: -10%;
  top: 50%;
  transform: translateY(-50%);
  width: 55%;
  height: auto;
}

/* ---------- Hero 视频背景 ---------- */
.hero-video {
  position: absolute;
  inset: 0;
  z-index: -1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 1.2s ease;
}

.hero-video.is-loaded {
  opacity: 1;
}

.hero-video-overlay {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(115deg,
    rgba(7, 31, 56, 0.92) 0%,
    rgba(7, 31, 56, 0.62) 42%,
    rgba(11, 42, 74, 0.42) 100%);
  pointer-events: none;
}

/* 视频模式时隐藏装饰线条，避免与视频叠加 */
.hero.has-video .hero-lines {
  display: none;
}

.hero .hero-inner {
  position: relative;
  z-index: 1;
}

.hero-inner {
  width: 100%;
  padding-top: 60px;
}

.hero-content {
  max-width: 680px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(8px);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 30px;
}

.hero-tag .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan-400);
  box-shadow: 0 0 0 4px rgba(0, 194, 168, 0.25);
  animation: pulse 2.4s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hero-title {
  font-size: clamp(38px, 5.4vw, 64px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: 0.02em;
  margin-bottom: 26px;
}

.hero-title .grad {
  background: linear-gradient(90deg, #4db4ff, #00c2a8);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub {
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.78);
  max-width: 560px;
  margin-bottom: 42px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 80px;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.hero-stat .num {
  font-size: clamp(30px, 3vw, 42px);
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
}

.hero-stat .num .plus {
  color: var(--blue-400);
}

.hero-stat .label {
  margin-top: 6px;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 0.08em;
}

/* ---------- 滚动入场动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ---------- 卡片 ---------- */
.card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 40px 34px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-100);
  transition: all 0.35s ease;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(0, 145, 255, 0.12), rgba(0, 194, 168, 0.12));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-500);
  margin-bottom: 22px;
}

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

.card h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--navy-900);
  margin-bottom: 12px;
}

.card p {
  font-size: 14.5px;
  color: var(--gray-500);
  line-height: 1.85;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--blue-500);
}

.card-link svg {
  width: 15px;
  height: 15px;
  transition: transform 0.25s ease;
}

.card-link:hover svg {
  transform: translateX(4px);
}

/* ---------- Grid ---------- */
.grid {
  display: grid;
  gap: 28px;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- 产品卡片 ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.product-card {
  position: relative;
  padding: 32px 26px;
  border-radius: var(--radius-md);
  background: var(--white);
  border: 1px solid var(--gray-100);
  box-shadow: var(--shadow-sm);
  transition: all 0.35s ease;
  overflow: hidden;
}

.product-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--blue-500), var(--cyan-400));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.product-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.product-card:hover::before {
  transform: scaleX(1);
}

.product-card .p-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: var(--gray-50);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--navy-700);
  margin-bottom: 16px;
  transition: all 0.3s ease;
}

.product-card:hover .p-icon {
  background: linear-gradient(135deg, var(--blue-500), var(--cyan-400));
  color: #fff;
}

.product-card h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--navy-900);
  margin-bottom: 6px;
}

.product-card .p-tags {
  font-size: 13px;
  color: var(--gray-400);
  line-height: 1.7;
}

/* ---------- 数字统计 ---------- */
.stats-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.stat-item {
  text-align: center;
  padding: 36px 20px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-item .num {
  font-size: clamp(36px, 4vw, 52px);
  font-weight: 800;
  color: var(--blue-400);
  line-height: 1.2;
}

.stat-item .num .suffix {
  font-size: 0.6em;
}

.stat-item .label {
  margin-top: 10px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  letter-spacing: 0.1em;
}

/* ---------- 业务区块 ---------- */
.biz-feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 80px;
  margin-bottom: 100px;
}

.biz-feature:last-child {
  margin-bottom: 0;
}

.biz-feature--reverse .biz-visual {
  order: 2;
}

.biz-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 420px;
  background:
    radial-gradient(50% 60% at 80% 15%, rgba(0, 145, 255, 0.22), transparent 60%),
    linear-gradient(150deg, var(--navy-800), var(--navy-900));
  display: flex;
  align-items: center;
  justify-content: center;
}

.biz-visual .biz-num {
  font-size: clamp(80px, 10vw, 140px);
  font-weight: 800;
  color: rgba(255, 255, 255, 0.1);
  line-height: 1;
  letter-spacing: -0.04em;
}

.biz-visual .biz-mark {
  position: absolute;
  bottom: 28px;
  left: 30px;
  color: rgba(255, 255, 255, 0.5);
  font-size: 13px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
}

.biz-content .biz-tag {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--blue-500);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.biz-content h3 {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  color: var(--navy-900);
  line-height: 1.3;
  margin-bottom: 20px;
}

.biz-content p {
  color: var(--gray-500);
  line-height: 2;
  margin-bottom: 26px;
}

.biz-points {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 20px;
  margin-bottom: 30px;
}

.biz-points li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14.5px;
  color: var(--gray-600);
}

.biz-points li::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue-500), var(--cyan-400));
  flex-shrink: 0;
}

/* ---------- 行业应用 ---------- */
.industry-card {
  position: relative;
  border-radius: var(--radius-md);
  padding: 38px 32px;
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--gray-100);
  box-shadow: var(--shadow-sm);
  transition: all 0.35s ease;
  min-height: 240px;
  display: flex;
  flex-direction: column;
}

.industry-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.industry-card .i-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(0, 145, 255, 0.1), rgba(0, 194, 168, 0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-500);
  margin-bottom: 20px;
}

.industry-card h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--navy-900);
  margin-bottom: 10px;
}

.industry-card p {
  font-size: 14px;
  color: var(--gray-500);
  line-height: 1.85;
  flex: 1;
}

.industry-card .i-more {
  margin-top: 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--gray-400);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 0.25s ease;
}

.industry-card:hover .i-more {
  color: var(--blue-500);
}

/* ---------- 新闻 ---------- */
.news-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.news-card {
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--gray-100);
  box-shadow: var(--shadow-sm);
  transition: all 0.35s ease;
}

.news-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.news-thumb {
  height: 200px;
  background:
    radial-gradient(40% 60% at 80% 10%, rgba(0, 145, 255, 0.2), transparent 60%),
    linear-gradient(150deg, var(--navy-700), var(--navy-900));
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.25);
  font-size: 14px;
  letter-spacing: 0.3em;
}

.news-body {
  padding: 26px 26px 30px;
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 12.5px;
  color: var(--gray-400);
  margin-bottom: 12px;
}

.news-body h4 {
  font-size: 16.5px;
  font-weight: 600;
  color: var(--navy-900);
  line-height: 1.6;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.25s ease;
}

.news-card:hover h4 {
  color: var(--blue-500);
}

.news-body .summary {
  font-size: 13.5px;
  color: var(--gray-500);
  line-height: 1.8;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---------- CTA 区块 ---------- */
.cta-band {
  position: relative;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(50% 80% at 85% 20%, rgba(0, 145, 255, 0.35), transparent 60%),
    linear-gradient(135deg, var(--navy-800), var(--navy-900));
  padding: 80px 64px;
  overflow: hidden;
  color: #fff;
}

.cta-band::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.12) 1px, transparent 1px);
  background-size: 26px 26px;
  opacity: 0.3;
}

.cta-band .cta-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}

.cta-band h2 {
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 12px;
}

.cta-band p {
  color: rgba(255, 255, 255, 0.72);
  font-size: 15.5px;
}

.cta-band .btn {
  flex-shrink: 0;
}

/* ---------- 面包屑 / 页面头 ---------- */
.page-hero {
  position: relative;
  padding: 190px 0 90px;
  min-height: 470px;
  display: flex;
  align-items: center;
  color: #fff;
  background:
    radial-gradient(55% 80% at 80% 15%, rgba(0, 145, 255, 0.25), transparent 60%),
    linear-gradient(135deg, #071f38 0%, #0b2a4a 50%, #12375f 100%);
  overflow: hidden;
}

.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.12) 1px, transparent 1px);
  background-size: 30px 30px;
  opacity: 0.28;
}

.page-hero .container {
  position: relative;
  z-index: 1;
}

.page-hero h1 {
  font-size: clamp(34px, 4.4vw, 52px);
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1.25;
  margin-bottom: 16px;
}

.page-hero .crumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 22px;
}

.page-hero .crumb a:hover {
  color: #fff;
}

.page-hero .crumb .sep {
  opacity: 0.5;
}

.page-hero p.lead {
  max-width: 640px;
  font-size: 16.5px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.78);
}

/* ---------- 页脚 ---------- */
.footer {
  background: var(--navy-900);
  color: var(--gray-300);
  padding: 80px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.3fr;
  gap: 48px;
  padding-bottom: 56px;
}

.footer-brand .brand {
  color: #fff;
  margin-bottom: 20px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.95;
  color: var(--gray-400);
  max-width: 300px;
}

.footer-social {
  display: flex;
  gap: 12px;
  margin-top: 22px;
}

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.7);
  transition: all 0.3s ease;
}

.footer-social a:hover {
  background: var(--blue-500);
  border-color: var(--blue-500);
  color: #fff;
  transform: translateY(-3px);
}

.footer-col h5 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.08em;
  margin-bottom: 22px;
}

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

.footer-col a {
  font-size: 14px;
  color: var(--gray-400);
  transition: all 0.25s ease;
}

.footer-col a:hover {
  color: var(--blue-400);
  padding-left: 4px;
}

.footer-contact li {
  display: flex;
  gap: 12px;
  font-size: 14px;
  color: var(--gray-400);
  margin-bottom: 16px;
  line-height: 1.7;
}

.footer-contact svg {
  width: 18px;
  height: 18px;
  color: var(--blue-400);
  flex-shrink: 0;
  margin-top: 3px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--gray-500);
}

.footer-bottom a {
  color: var(--gray-400);
}

.footer-bottom a:hover {
  color: var(--blue-400);
}

/* ---------- 联系我们页 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
}

.contact-info-card {
  padding: 44px 40px;
}

.contact-block {
  padding: 24px 0;
  border-bottom: 1px solid var(--gray-100);
}

.contact-block:last-child {
  border-bottom: none;
}

.contact-block h4 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 700;
  color: var(--navy-900);
  margin-bottom: 14px;
}

.contact-block h4 svg {
  width: 20px;
  height: 20px;
  color: var(--blue-500);
}

.contact-block .addr {
  font-size: 15px;
  color: var(--gray-600);
  line-height: 1.9;
}

.contact-block .addr .name {
  font-weight: 600;
  color: var(--navy-800);
}

.contact-tel {
  font-size: clamp(26px, 3vw, 34px);
  font-weight: 800;
  color: var(--blue-500);
  letter-spacing: 0.02em;
}

.form-card {
  padding: 44px 40px;
}

.form-card h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--navy-900);
  margin-bottom: 8px;
}

.form-card .form-desc {
  font-size: 14px;
  color: var(--gray-400);
  margin-bottom: 28px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--gray-600);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 13px 16px;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 15px;
  color: var(--gray-900);
  background: var(--gray-50);
  transition: all 0.25s ease;
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--blue-500);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(0, 145, 255, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-submit {
  width: 100%;
  margin-top: 8px;
}

/* ---------- 关于页 时间线 ---------- */
.timeline {
  position: relative;
  padding-left: 36px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--blue-500), var(--cyan-400), transparent);
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  padding-bottom: 44px;
}

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

.timeline-item::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  border: 4px solid var(--blue-500);
  box-shadow: 0 0 0 5px rgba(0, 145, 255, 0.12);
}

.timeline-item .year {
  font-size: 20px;
  font-weight: 800;
  color: var(--blue-500);
  margin-bottom: 6px;
}

.timeline-item h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--navy-900);
  margin-bottom: 8px;
}

.timeline-item p {
  font-size: 14.5px;
  color: var(--gray-500);
  line-height: 1.9;
}

/* ---------- 资质徽章 ---------- */
.badge-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.badge-card {
  padding: 34px 28px;
  text-align: center;
  border-radius: var(--radius-md);
  background: var(--white);
  border: 1px solid var(--gray-100);
  box-shadow: var(--shadow-sm);
}

.badge-card .b-icon {
  width: 54px;
  height: 54px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(0, 145, 255, 0.12), rgba(0, 194, 168, 0.12));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-500);
}

.badge-card h4 {
  font-size: 16.5px;
  font-weight: 700;
  color: var(--navy-900);
  margin-bottom: 8px;
}

.badge-card p {
  font-size: 13.5px;
  color: var(--gray-500);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .grid-4,
  .product-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
  }

  .biz-feature {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .biz-feature--reverse .biz-visual {
    order: 0;
  }

  .biz-visual {
    min-height: 320px;
  }

  .news-list {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --section-pad: 72px;
  }

  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: min(320px, 82vw);
    height: 100vh;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding: 96px 32px 40px;
    box-shadow: -20px 0 60px rgba(7, 31, 56, 0.15);
    transition: right 0.4s cubic-bezier(0.22, 1, 0.36, 1);
    z-index: 99;
  }

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

  .nav-link {
    color: var(--navy-900) !important;
    font-size: 17px;
    padding: 12px 0;
    width: 100%;
  }

  .nav-cta {
    margin: 16px 0 0;
    width: 100%;
  }

  .nav-cta .btn {
    width: 100%;
  }

  .nav-toggle {
    display: flex;
  }

  .grid-2,
  .grid-3,
  .grid-4,
  .product-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding: 130px 0 70px;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 22px;
    margin-top: 56px;
  }

  .stats-band {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .news-list {
    grid-template-columns: 1fr;
  }

  .cta-band {
    padding: 56px 32px;
  }

  .biz-points {
    grid-template-columns: 1fr;
  }

  .timeline {
    padding-left: 30px;
  }

  .badge-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- 辅助 ---------- */
.mt-24 { margin-top: 24px; }
.mt-40 { margin-top: 40px; }
.mt-64 { margin-top: 64px; }
.text-center { text-align: center; }

.pattern-dots {
  background-image: radial-gradient(rgba(255, 255, 255, 0.14) 1px, transparent 1px);
  background-size: 26px 26px;
}

/* 内容页通用排版 */
.prose {
  font-size: 15.5px;
  line-height: 2.05;
  color: var(--gray-600);
}

.prose p {
  margin-bottom: 18px;
}

.prose h3 {
  font-size: 21px;
  font-weight: 700;
  color: var(--navy-900);
  margin: 34px 0 14px;
}

.prose strong {
  color: var(--navy-800);
}

/* ===== 图片占位替换（2026-08-21 主管：占位符插入真实图片，后续自行替换其他图） ===== */
.biz-visual img.biz-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
}
.news-thumb {
  position: relative;
}
.news-thumb img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 生产基地单卡片（2026-08-21 关闭分公司清理后） */
.grid-1 { grid-template-columns: 1fr; }
.grid-1 .card { max-width: 460px; margin: 0 auto; width: 100%; }