/* ============================================================
   楚盛膜结构 企业官网 - 全局样式
   风格：简约大气 · 深海蓝 + 白 + 橙
   ============================================================ */

:root {
  --primary: #0c2d4a;
  --primary-deep: #081f35;
  --primary-light: #144a75;
  --accent: #f08c2e;
  --accent-dark: #d9771e;
  --bg: #ffffff;
  --bg-soft: #f4f7fa;
  --bg-blue: #eef4fa;
  --text: #22313f;
  --text-muted: #5d6d7c;
  --border: #e3e9f0;
  --radius: 14px;
  --shadow-sm: 0 2px 10px rgba(12, 45, 74, 0.06);
  --shadow-md: 0 10px 30px rgba(12, 45, 74, 0.10);
  --shadow-lg: 0 20px 50px rgba(12, 45, 74, 0.16);
  --maxw: 1180px;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

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

/* ---------- 通用板块 ---------- */
.section { padding: 88px 0; }
.section-soft { background: var(--bg-soft); }
.section-blue { background: var(--bg-blue); }

.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head .tag {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--accent); font-size: 14px; font-weight: 600; letter-spacing: 2px;
  margin-bottom: 14px;
}
.section-head .tag::before, .section-head .tag::after {
  content: ""; width: 26px; height: 1px; background: var(--accent); opacity: .6;
}
.section-head h2 { font-size: 36px; color: var(--primary); font-weight: 700; letter-spacing: 1px; line-height: 1.35; }
.section-head p { margin-top: 14px; color: var(--text-muted); font-size: 16px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 34px; border-radius: 999px; font-size: 16px; font-weight: 600;
  transition: all .25s ease; cursor: pointer; border: none; line-height: 1.4;
}
.btn-accent { background: var(--accent); color: #fff; box-shadow: 0 8px 22px rgba(240, 140, 46, 0.35); }
.btn-accent:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 12px 28px rgba(240, 140, 46, 0.45); }
.btn-ghost { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,.65); }
.btn-ghost:hover { background: rgba(255,255,255,.12); border-color: #fff; transform: translateY(-2px); }
.btn-outline { background: transparent; color: var(--primary); border: 1.5px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }

/* ---------- 顶部导航 ---------- */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background .3s ease, box-shadow .3s ease;
}
.header .container { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.header.scrolled { background: rgba(8, 31, 53, 0.97); box-shadow: 0 4px 20px rgba(0,0,0,.25); backdrop-filter: blur(8px); }
.header:not(.scrolled) { background: linear-gradient(to bottom, rgba(8,31,53,.85), rgba(8,31,53,.35)); }

.logo { display: flex; align-items: center; gap: 12px; color: #fff; }
.logo .logo-mark {
  width: auto; height: 42px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
  overflow: hidden;
}
.logo .logo-mark img { height: 42px; width: auto; display: block; border-radius: 10px; }
.logo .logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo .logo-text b { font-size: 20px; letter-spacing: 2px; font-weight: 700; }
.logo .logo-text span { font-size: 11px; color: rgba(255,255,255,.75); letter-spacing: 3px; }

.nav { display: flex; align-items: center; gap: 36px; }
.nav a { color: rgba(255,255,255,.88); font-size: 15.5px; font-weight: 500; position: relative; padding: 6px 0; transition: color .2s; }
.nav a::after {
  content: ""; position: absolute; left: 0; bottom: 0; width: 0; height: 2px;
  background: var(--accent); transition: width .25s ease; border-radius: 2px;
}
.nav a:hover, .nav a.active { color: #fff; }
.nav a:hover::after, .nav a.active::after { width: 100%; }

.header-phone {
  display: inline-flex; align-items: center; gap: 8px; color: #fff;
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.3);
  padding: 9px 18px; border-radius: 999px; font-weight: 600; font-size: 15px;
  transition: all .25s;
}
.header-phone:hover { background: var(--accent); border-color: var(--accent); }

.nav-toggle { display: none; background: none; border: none; color: #fff; cursor: pointer; padding: 6px; }

/* ---------- Hero ---------- */
.hero {
  position: relative; min-height: 92vh; display: flex; align-items: center;
  background: linear-gradient(140deg, #081f35 0%, #0c2d4a 45%, #144a75 100%);
  color: #fff; overflow: hidden; padding: 140px 0 100px;
}
.hero::before {
  content: ""; position: absolute; inset: 0; opacity: .5;
  background:
    radial-gradient(ellipse at 78% 20%, rgba(240,140,46,.28), transparent 45%),
    radial-gradient(ellipse at 15% 85%, rgba(46,111,216,.3), transparent 50%);
}
.hero-grid {
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at 50% 40%, #000 30%, transparent 75%);
}
.hero .container { position: relative; z-index: 2; display: grid; grid-template-columns: 1.15fr .85fr; gap: 60px; align-items: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 10px;
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.25);
  padding: 8px 18px; border-radius: 999px; font-size: 14px; letter-spacing: 1px; color: #ffd9ad;
  margin-bottom: 26px; backdrop-filter: blur(4px);
}
.hero h1 { font-size: 52px; line-height: 1.22; font-weight: 700; letter-spacing: 1px; margin-bottom: 22px; }
.hero h1 .hl { color: #ffb35c; }
.hero .sub { font-size: 18px; color: rgba(255,255,255,.82); max-width: 560px; margin-bottom: 36px; }
.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-points { display: flex; gap: 28px; margin-top: 46px; flex-wrap: wrap; }
.hero-points li { display: flex; align-items: center; gap: 8px; font-size: 14.5px; color: rgba(255,255,255,.85); }
.hero-points li svg { color: #ffb35c; flex-shrink: 0; }

/* Hero 右侧插画 */
.hero-art { position: relative; }
.hero-art .shed-wrap {
  background: linear-gradient(160deg, rgba(255,255,255,.12), rgba(255,255,255,.04));
  border: 1px solid rgba(255,255,255,.2); border-radius: 24px; padding: 30px;
  backdrop-filter: blur(6px); box-shadow: 0 30px 60px rgba(0,0,0,.3);
}
.hero-art .float-card {
  position: absolute; background: rgba(255,255,255,.97); color: var(--text);
  border-radius: 12px; padding: 12px 18px; box-shadow: var(--shadow-lg);
  display: flex; align-items: center; gap: 10px; font-size: 14px; font-weight: 600;
  animation: floaty 4.5s ease-in-out infinite;
}
.float-card.fc1 { top: -18px; left: -28px; }
.float-card.fc2 { bottom: 24px; right: -30px; animation-delay: 1.2s; }
.float-card .dot { width: 10px; height: 10px; border-radius: 50%; background: #22c55e; box-shadow: 0 0 0 4px rgba(34,197,94,.18); }
@keyframes floaty { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

/* ---------- 数据条 ---------- */
.stats-band { background: var(--primary); color: #fff; padding: 34px 0; }
.stats-band .container { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stat b { font-size: 40px; font-weight: 700; color: #ffb35c; display: block; line-height: 1.2; }
.stat span { font-size: 14px; color: rgba(255,255,255,.8); letter-spacing: 1px; }
.stat + .stat { border-left: 1px solid rgba(255,255,255,.14); }

/* ---------- 优势卡片 ---------- */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.feature-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 34px 28px; transition: all .3s ease; position: relative; overflow: hidden;
}
.feature-card::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
  background: var(--accent); transform: scaleY(0); transform-origin: bottom; transition: transform .3s ease;
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }
.feature-card:hover::before { transform: scaleY(1); }
.feature-card .icon {
  width: 58px; height: 58px; border-radius: 14px; background: var(--bg-blue); color: var(--primary-light);
  display: flex; align-items: center; justify-content: center; margin-bottom: 20px; transition: all .3s;
}
.feature-card:hover .icon { background: var(--primary); color: #ffb35c; }
.feature-card h3 { font-size: 19px; color: var(--primary); margin-bottom: 10px; font-weight: 700; }
.feature-card p { font-size: 14.5px; color: var(--text-muted); }

/* ---------- 产品卡片 ---------- */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.product-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; transition: all .3s ease; display: flex; flex-direction: column;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }
.product-card .art {
  background: linear-gradient(150deg, #eaf1f8, #dce8f4); padding: 30px 24px 16px;
  display: flex; align-items: center; justify-content: center; position: relative; overflow: hidden;
}
.product-card .art svg { width: 100%; max-width: 300px; height: auto; }
.product-card .body { padding: 22px 24px 26px; flex: 1; display: flex; flex-direction: column; }
.product-card .body h3 { font-size: 19px; color: var(--primary); font-weight: 700; margin-bottom: 8px; }
.product-card .body p { font-size: 14px; color: var(--text-muted); flex: 1; }
.product-card .link {
  margin-top: 16px; color: var(--accent); font-weight: 600; font-size: 14.5px;
  display: inline-flex; align-items: center; gap: 6px; transition: gap .2s;
}
.product-card .link:hover { gap: 10px; }

/* ---------- 流程 ---------- */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; counter-reset: step; }
.step {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 30px 22px; text-align: center; position: relative; transition: all .3s;
}
.step:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.step .num {
  width: 46px; height: 46px; margin: 0 auto 16px; border-radius: 50%;
  background: var(--primary); color: #ffb35c; font-size: 20px; font-weight: 700;
  display: flex; align-items: center; justify-content: center; position: relative;
}
.step .num::after {
  content: ""; position: absolute; left: calc(100% + 10px); top: 50%; transform: translateY(-50%);
  width: 20px; height: 0; border-top: 2px dashed rgba(240,140,46,.5);
}
.step:last-child .num::after { display: none; }
.step h4 { font-size: 16px; color: var(--primary); margin-bottom: 6px; font-weight: 700; }
.step p { font-size: 13px; color: var(--text-muted); }

/* ---------- 对比表 ---------- */
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-md); }
.compare-col { padding: 38px 34px; }
.compare-col.us { background: var(--primary); color: #fff; }
.compare-col.them { background: #fff; }
.compare-col h3 { font-size: 21px; font-weight: 700; margin-bottom: 6px; display: flex; align-items: center; gap: 10px; }
.compare-col .subtitle { font-size: 13.5px; margin-bottom: 26px; opacity: .8; }
.compare-col.them .subtitle { color: var(--text-muted); }
.compare-col ul li {
  display: flex; gap: 12px; padding: 13px 0; border-bottom: 1px solid rgba(255,255,255,.12);
  font-size: 14.5px; align-items: flex-start;
}
.compare-col.them ul li { border-bottom-color: var(--border); color: var(--text-muted); }
.compare-col ul li:last-child { border-bottom: none; }
.compare-col ul li svg { flex-shrink: 0; margin-top: 3px; }
.compare-col.us ul li svg { color: #ffb35c; }
.compare-col.them ul li svg { color: #c3cdd6; }

/* ---------- 区域覆盖 ---------- */
.region-wrap { display: grid; grid-template-columns: 1.1fr .9fr; gap: 50px; align-items: center; }
.region-list { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 28px; }
.region-item { display: flex; align-items: flex-start; gap: 10px; padding: 14px 0; border-bottom: 1px dashed var(--border); }
.region-item svg { color: var(--accent); flex-shrink: 0; margin-top: 3px; }
.region-item b { color: var(--primary); font-size: 15.5px; display: block; }
.region-item span { font-size: 13px; color: var(--text-muted); }
.region-panel {
  background: var(--primary); border-radius: var(--radius); color: #fff; padding: 38px 32px;
  background-image: radial-gradient(ellipse at 90% 10%, rgba(240,140,46,.25), transparent 50%);
}
.region-panel h3 { font-size: 22px; margin-bottom: 8px; }
.region-panel > p { color: rgba(255,255,255,.75); font-size: 14px; margin-bottom: 24px; }
.region-panel .chip { display: inline-flex; margin: 0 8px 8px 0; background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.2); padding: 6px 14px; border-radius: 999px; font-size: 13px; }
/* 区域覆盖：城市链接化 */
.region-item b a { color: inherit; text-decoration: none; border-bottom: 2px solid transparent; transition: color .2s, border-color .2s; }
.region-item b a:hover { color: var(--accent); border-color: var(--accent); }
.region-panel a.chip { color: #fff; text-decoration: none; cursor: pointer; transition: background .2s, border-color .2s, transform .2s; }
.region-panel a.chip:hover { background: var(--accent); border-color: var(--accent); transform: translateY(-2px); }

/* ---------- CTA 条 ---------- */
.cta-band {
  position: relative; background: linear-gradient(135deg, #0c2d4a, #144a75); color: #fff;
  padding: 80px 0; text-align: center; overflow: hidden;
}
.cta-band::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 50% 120%, rgba(240,140,46,.3), transparent 60%);
}
.cta-band .container { position: relative; z-index: 2; }
.cta-band h2 { font-size: 34px; font-weight: 700; margin-bottom: 14px; letter-spacing: 1px; }
.cta-band p { color: rgba(255,255,255,.8); font-size: 16.5px; margin-bottom: 32px; max-width: 640px; margin-left: auto; margin-right: auto; }

/* ---------- 内页 banner ---------- */
.page-banner {
  position: relative; background: linear-gradient(140deg, #081f35, #0c2d4a 55%, #144a75);
  color: #fff; padding: 150px 0 64px; overflow: hidden;
}
.page-banner::before {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at 60% 30%, #000 20%, transparent 70%);
}
.page-banner .container { position: relative; z-index: 2; }
.page-banner .crumb { font-size: 14px; color: rgba(255,255,255,.65); margin-bottom: 14px; letter-spacing: 1px; }
.page-banner .crumb a:hover { color: #ffb35c; }
.page-banner h1 { font-size: 42px; font-weight: 700; letter-spacing: 2px; }
.page-banner p { margin-top: 12px; color: rgba(255,255,255,.75); max-width: 640px; font-size: 16px; }

/* ---------- 页脚 ---------- */
.footer { background: var(--primary-deep); color: rgba(255,255,255,.75); padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 44px; }
.footer h4 { color: #fff; font-size: 16px; margin-bottom: 18px; letter-spacing: 1px; }
.footer .about p { font-size: 14px; margin: 14px 0 20px; }
.footer .f-links li { margin-bottom: 10px; }
.footer .f-links a { font-size: 14px; transition: color .2s, padding-left .2s; }
.footer .f-links a:hover { color: #ffb35c; padding-left: 5px; }
.footer .contact li { display: flex; gap: 10px; margin-bottom: 12px; font-size: 14px; align-items: flex-start; }
.footer .contact svg { color: #ffb35c; flex-shrink: 0; margin-top: 3px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding: 20px 0; font-size: 13px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; color: rgba(255,255,255,.5); }

/* ---------- 滚动动画 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ---------- 表单 ---------- */
.form-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 36px; box-shadow: var(--shadow-sm);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 14px; font-weight: 600; color: var(--primary); margin-bottom: 8px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 12px 16px; border: 1.5px solid var(--border); border-radius: 10px;
  font-size: 15px; font-family: inherit; color: var(--text); background: #fbfdff; transition: border .2s, box-shadow .2s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--primary-light); box-shadow: 0 0 0 4px rgba(20,74,117,.1);
}
.form-group textarea { resize: vertical; min-height: 120px; }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 44px; align-items: start; }
.contact-info-card {
  background: var(--primary); color: #fff; border-radius: var(--radius); padding: 36px 32px;
  background-image: radial-gradient(ellipse at 90% 0%, rgba(240,140,46,.25), transparent 55%);
}
.contact-info-card h3 { font-size: 22px; margin-bottom: 8px; }
.contact-info-card > p { color: rgba(255,255,255,.75); font-size: 14px; margin-bottom: 26px; }
.contact-info-card .ci { display: flex; gap: 14px; padding: 14px 0; border-bottom: 1px solid rgba(255,255,255,.12); align-items: flex-start; }
.contact-info-card .ci:last-child { border-bottom: none; }
.contact-info-card .ci svg { color: #ffb35c; flex-shrink: 0; margin-top: 4px; }
.contact-info-card .ci b { display: block; font-size: 15px; }
.contact-info-card .ci span { font-size: 13.5px; color: rgba(255,255,255,.75); }
.contact-info-card .ci a { color: #ffb35c; font-weight: 600; }

/* 服务范围列表 */
.scope-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.scope-card { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 22px 18px; text-align: center; transition: all .3s; }
.scope-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: transparent; }
.scope-card .icon { width: 48px; height: 48px; margin: 0 auto 12px; border-radius: 12px; background: var(--bg-blue); color: var(--primary-light); display: flex; align-items: center; justify-content: center; }
.scope-card b { display: block; color: var(--primary); font-size: 15px; }
.scope-card span { font-size: 12.5px; color: var(--text-muted); }

/* ---------- 关于页 ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.about-text h2 { font-size: 32px; color: var(--primary); margin-bottom: 18px; line-height: 1.4; }
.about-text p { color: var(--text-muted); margin-bottom: 14px; font-size: 15.5px; }
.about-text .lead { color: var(--text); font-size: 17px; font-weight: 500; }

.factory-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.factory-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; display: flex; gap: 18px; align-items: flex-start; transition: all .3s; }
.factory-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.factory-card .icon { width: 52px; height: 52px; flex-shrink: 0; border-radius: 12px; background: var(--bg-blue); color: var(--primary-light); display: flex; align-items: center; justify-content: center; }
.factory-card h4 { color: var(--primary); font-size: 17px; margin-bottom: 6px; }
.factory-card p { font-size: 13.5px; color: var(--text-muted); }

/* 理念卡片 */
.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.value-card { background: var(--primary); color: #fff; border-radius: var(--radius); padding: 34px 28px; position: relative; overflow: hidden; }
.value-card::after {
  content: ""; position: absolute; right: -30px; bottom: -30px; width: 140px; height: 140px;
  border-radius: 50%; background: rgba(255,255,255,.05);
}
.value-card h3 { font-size: 21px; margin-bottom: 12px; display: flex; align-items: center; gap: 10px; }
.value-card h3 span { color: #ffb35c; }
.value-card p { color: rgba(255,255,255,.78); font-size: 14px; }

/* ---------- 产品页 ---------- */
.product-detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: center; }
.product-detail-grid.rev .detail-art { order: 2; }
.detail-art {
  background: linear-gradient(150deg, #eaf1f8, #dce8f4); border-radius: var(--radius);
  padding: 36px 30px; display: flex; align-items: center; justify-content: center; min-height: 320px;
}
.detail-art svg { width: 100%; max-width: 420px; height: auto; }
.detail-body h3 { font-size: 26px; color: var(--primary); margin-bottom: 12px; font-weight: 700; }
.detail-body .desc { color: var(--text-muted); font-size: 15px; margin-bottom: 20px; }
.detail-body ul li { display: flex; gap: 10px; padding: 9px 0; font-size: 14.5px; color: var(--text); border-bottom: 1px dashed var(--border); align-items: flex-start; }
.detail-body ul li:last-child { border-bottom: none; }
.detail-body ul svg { color: var(--accent); flex-shrink: 0; margin-top: 4px; }

/* 材质对比 */
.material-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); }
.material-table th, .material-table td { padding: 16px 20px; text-align: left; font-size: 14.5px; border-bottom: 1px solid var(--border); }
.material-table thead th { background: var(--primary); color: #fff; font-weight: 600; letter-spacing: 1px; }
.material-table tbody tr:last-child td { border-bottom: none; }
.material-table tbody tr:hover { background: var(--bg-blue); }
.material-table .good { color: #16a34a; font-weight: 600; }
.material-table .bad { color: #dc2626; font-weight: 600; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero h1 { font-size: 42px; }
  .hero .container { grid-template-columns: 1fr; gap: 50px; }
  .hero-art { max-width: 520px; margin: 0 auto; }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .step .num::after { display: none; }
  .product-grid, .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .region-wrap { grid-template-columns: 1fr; gap: 36px; }
  .scope-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid, .product-detail-grid { grid-template-columns: 1fr; }
  .product-detail-grid.rev .detail-art { order: 0; }
  .compare { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .value-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .section-head h2 { font-size: 28px; }
  .nav {
    position: fixed; top: 0; right: -100%; width: 78%; max-width: 320px; height: 100vh;
    background: var(--primary-deep); flex-direction: column; justify-content: flex-start;
    padding: 100px 36px 40px; gap: 26px; transition: right .35s ease; z-index: 99;
    box-shadow: -10px 0 40px rgba(0,0,0,.3);
  }
  .nav.open { right: 0; }
  .nav a { font-size: 17px; }
  .nav-toggle { display: block; z-index: 101; position: relative; }
  .header-phone { display: none; }
  .hero { padding-top: 120px; padding-bottom: 70px; min-height: auto; }
  .hero h1 { font-size: 32px; }
  .hero .sub { font-size: 16px; }
  .hero-points { gap: 14px 20px; }
  .stats-band .container { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .stat + .stat { border-left: none; }
  .stat b { font-size: 30px; }
  .product-grid, .feature-grid, .steps, .factory-grid, .form-row { grid-template-columns: 1fr; }
  .region-list { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .page-banner { padding: 120px 0 50px; }
  .page-banner h1 { font-size: 30px; }
  .float-card.fc1 { left: 8px; }
  .float-card.fc2 { right: 8px; }
  .scope-grid { grid-template-columns: 1fr 1fr; }
  .cta-band h2 { font-size: 26px; }
  .material-table { display: block; overflow-x: auto; white-space: nowrap; }
}

/* ---------- 空白占位图（预留真实图片位置） ---------- */
.blank-img {
  width: 100%; height: auto; object-fit: cover; display: block;
}
.hero-art .blank-img { aspect-ratio: 520 / 380; border-radius: 10px; }
.product-card .art .blank-img { aspect-ratio: 320 / 170; border-radius: 8px; }
.detail-art .blank-img { aspect-ratio: 420 / 240; border-radius: 10px; }
.detail-art .about-blank { aspect-ratio: 420 / 300; }

/* ---------- 工程案例 ---------- */
.case-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.case-item { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); }
.case-item img { width: 100%; height: 180px; object-fit: cover; display: block; transition: transform .35s ease; }
.case-item:hover img { transform: scale(1.05); }
@media (max-width: 768px) { .case-grid { grid-template-columns: repeat(2, 1fr); } }

/* ---------- 区域覆盖页 ---------- */
.region-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.city-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px 24px; transition: all .3s ease; position: relative; overflow: hidden;
  display: flex; flex-direction: column; gap: 8px;
}
.city-card::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
  background: var(--accent); transform: scaleY(0); transform-origin: bottom; transition: transform .3s ease;
}
.city-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }
.city-card:hover::before { transform: scaleY(1); }
.city-card b { font-size: 19px; color: var(--primary); font-weight: 700; display: flex; align-items: center; gap: 8px; }
.city-card span { font-size: 13px; color: var(--text-muted); line-height: 1.6; }
.city-card .go {
  margin-top: 6px; color: var(--accent); font-weight: 600; font-size: 13.5px;
  display: inline-flex; align-items: center; gap: 5px; transition: gap .2s;
}
.city-card:hover .go { gap: 9px; }
.city-note { text-align: center; color: var(--text-muted); font-size: 14px; margin-top: 34px; }

@media (max-width: 1024px) {
  .region-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
  .region-grid { grid-template-columns: repeat(2, 1fr); }
}