/* ==========================================================================
   武汉舜之达官网 — 设计系统 (Design System)
   - 加载 Tailwind CDN（工具类）
   - 自定义 CSS 变量（设计令牌 Token）
   - 全局基础排版 + 组件样式 + 响应式断点
   - 所有页面通过 .class 消费 Token，改一处全局生效
   ========================================================================== */

/* Tailwind CDN */
@import url('https://cdn.jsdelivr.net/npm/tailwindcss@2.2.19/dist/tailwind.min.css');

/* --------------------------------------------------------------------------
   Design Tokens（设计令牌）
   -------------------------------------------------------------------------- */
:root {
  /* 主色 — 科技蓝 */
  --color-primary-900: #062A66;
  --color-primary-800: #0A3D8F;
  --color-primary-700: #154FA8;
  --color-primary-600: #2E86DE;
  --color-primary-500: #5DADE2;
  --color-primary-100: #EAF1FA;
  --color-primary-50:  #F4F7FB;

  /* 中性色 */
  --color-bg:         #FFFFFF;
  --color-bg-soft:    #F4F7FB;
  --color-bg-blue:    #EAF1FA;
  --color-text:       #1A2733;
  --color-text-muted: #5A6B7B;
  --color-border:     #E2E8F0;
  --color-border-dark:#CBD5E1;

  /* 功能色 */
  --color-success: #27AE60;
  --color-danger:  #E74C3C;
  --color-warning: #F39C12;

  /* 字体栈（零外部请求） */
  --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Segoe UI",
               Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "Consolas", "Courier New", monospace;

  /* 字号 */
  --fs-xs:   12px;
  --fs-sm:   14px;
  --fs-base: 16px;
  --fs-lg:   18px;
  --fs-xl:   20px;
  --fs-2xl:  24px;
  --fs-3xl:  30px;
  --fs-4xl:  36px;
  --fs-5xl:  48px;

  /* 字重 */
  --fw-regular: 400;
  --fw-medium:  500;
  --fw-semibold:600;
  --fw-bold:    700;

  /* 行高 */
  --lh-tight:   1.2;
  --lh-snug:    1.4;
  --lh-normal:  1.6;
  --lh-loose:   1.8;

  /* 间距（8pt 网格） */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  20px;
  --space-6:  24px;
  --space-8:  32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;

  /* 圆角 */
  --radius-sm:  4px;
  --radius:     6px;
  --radius-md:  8px;
  --radius-lg:  12px;
  --radius-xl:  16px;
  --radius-2xl: 24px;
  --radius-full:9999px;

  /* 阴影 */
  --shadow-sm:   0 1px 2px rgba(10,61,143,.06);
  --shadow:      0 2px 8px rgba(10,61,143,.08);
  --shadow-md:   0 4px 16px rgba(10,61,143,.10);
  --shadow-lg:   0 8px 32px rgba(10,61,143,.14);
  --shadow-xl:   0 16px 48px rgba(10,61,143,.18);
  --shadow-blue: 0 8px 24px rgba(46,134,222,.28);

  /* 渐变 */
  --gradient-primary: linear-gradient(135deg, #0A3D8F 0%, #2E86DE 100%);
  --gradient-hero:    linear-gradient(135deg, #062A66 0%, #0A3D8F 45%, #2E86DE 100%);
  --gradient-card:    linear-gradient(180deg, #FFFFFF 0%, #F4F7FB 100%);

  /* 容器 */
  --container-max: 1200px;
  --container-pad: 24px;

  /* 页头高度 */
  --header-h: 72px;

  /* 过渡 */
  --t-fast: 150ms ease;
  --t-base: 250ms ease;
  --t-slow: 400ms ease;
}

/* --------------------------------------------------------------------------
   基础重置 & 全局排版
   -------------------------------------------------------------------------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary-600); text-decoration: none; transition: color var(--t-fast); }
a:hover { color: var(--color-primary-800); }
h1,h2,h3,h4,h5,h6 {
  margin: 0 0 var(--space-4);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  color: var(--color-text);
  letter-spacing: -0.01em;
}
h1 { font-size: var(--fs-5xl); }
h2 { font-size: var(--fs-4xl); }
h3 { font-size: var(--fs-2xl); font-weight: var(--fw-semibold); }
h4 { font-size: var(--fs-xl); font-weight: var(--fw-semibold); }
p { margin: 0 0 var(--space-4); }

/* --------------------------------------------------------------------------
   布局工具
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}
.section { padding: var(--space-20) 0; }
.section-sm { padding: var(--space-12) 0; }
.section-lg { padding: var(--space-24) 0; }

/* --------------------------------------------------------------------------
   导航栏 / 页头
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-base), box-shadow var(--t-base);
}
.site-header.is-scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: var(--space-8);
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: var(--fw-bold);
  font-size: var(--fs-lg);
  color: var(--color-primary-800);
  letter-spacing: -0.01em;
}
.nav-brand-logo {
  width: 36px; height: 36px;
  display: grid; place-items: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  color: #fff;
  box-shadow: var(--shadow-blue);
}
.nav-brand-en { font-size: var(--fs-xs); color: var(--color-text-muted); font-weight: var(--fw-medium); letter-spacing: .12em; }
.nav-links { display: flex; align-items: center; gap: var(--space-8); }
.nav-link {
  position: relative;
  color: var(--color-text);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  padding: var(--space-2) 0;
  transition: color var(--t-fast);
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--color-primary-600);
  transition: width var(--t-base);
}
.nav-link:hover { color: var(--color-primary-700); }
.nav-link:hover::after,
.nav-link.is-active::after { width: 100%; }
.nav-link.is-active { color: var(--color-primary-700); font-weight: var(--fw-semibold); }
.nav-actions { display: flex; align-items: center; gap: var(--space-4); }
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 6px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  background: var(--color-bg);
  cursor: pointer;
  transition: all var(--t-fast);
}
.lang-switch:hover { color: var(--color-primary-700); border-color: var(--color-primary-600); }
.lang-switch .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--color-primary-600); }

/* 汉堡菜单（移动端） */
.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  align-items: center; justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  cursor: pointer;
}
.nav-toggle svg { width: 20px; height: 20px; stroke: var(--color-text); }

/* --------------------------------------------------------------------------
   按钮
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 12px 24px;
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  line-height: 1;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--t-base);
  white-space: nowrap;
  text-decoration: none;
}
.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: var(--shadow-blue);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 28px rgba(46,134,222,.36);
  color: #fff;
}
.btn-outline {
  background: transparent;
  color: var(--color-primary-700);
  border-color: var(--color-primary-600);
}
.btn-outline:hover {
  background: var(--color-primary-50);
  color: var(--color-primary-800);
}
.btn-ghost {
  background: rgba(255,255,255,.12);
  color: #fff;
  border-color: rgba(255,255,255,.4);
  backdrop-filter: blur(4px);
}
.btn-ghost:hover { background: rgba(255,255,255,.24); color: #fff; }
.btn-lg { padding: 16px 32px; font-size: var(--fs-base); }
.btn-sm { padding: 8px 16px; font-size: var(--fs-xs); }
.btn-block { width: 100%; }

/* --------------------------------------------------------------------------
   卡片
   -------------------------------------------------------------------------- */
.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: transform var(--t-base), box-shadow var(--t-base), border-color var(--t-base);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-500);
}
.card-soft { background: var(--gradient-card); }
.card-icon {
  display: grid;
  place-items: center;
  width: 56px; height: 56px;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  color: #fff;
  margin-bottom: var(--space-4);
  box-shadow: var(--shadow-blue);
}
.card-icon svg { width: 28px; height: 28px; stroke: #fff; }
.card-title { font-size: var(--fs-xl); font-weight: var(--fw-semibold); margin-bottom: var(--space-3); }
.card-desc { color: var(--color-text-muted); line-height: var(--lh-normal); margin: 0; }

/* 卡片栅格 */
.grid {
  display: grid;
  gap: var(--space-6);
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-6 { grid-template-columns: repeat(6, 1fr); }

/* --------------------------------------------------------------------------
   首页 Banner
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  min-height: 560px;
  display: flex;
  align-items: center;
  background: var(--gradient-hero);
  color: #fff;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(800px 400px at 80% 20%, rgba(93,173,226,.25), transparent 60%),
    radial-gradient(600px 300px at 20% 80%, rgba(46,134,222,.20), transparent 60%);
  pointer-events: none;
}
.hero::after {
  /* 光路几何装饰 */
  content: '';
  position: absolute;
  right: -100px; top: 50%;
  width: 600px; height: 600px;
  transform: translateY(-50%);
  background:
    radial-gradient(circle at center, transparent 30%, transparent 31%, rgba(255,255,255,.04) 32%, transparent 33%),
    conic-gradient(from 0deg, transparent 0deg, rgba(255,255,255,.06) 30deg, transparent 60deg, rgba(255,255,255,.06) 120deg, transparent 150deg, rgba(255,255,255,.06) 240deg, transparent 270deg);
  border-radius: 50%;
  pointer-events: none;
}
/* 首页主视觉底图（b-01-*.webp）：缺图时 onerror 移除，回退纯渐变 */
.hero > img.hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .45;
}
.hero-inner { position: relative; z-index: 1; max-width: 720px; padding: var(--space-16) 0; }
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 6px 14px;
  border: 1px solid rgba(255,255,255,.25);
  background: rgba(255,255,255,.08);
  backdrop-filter: blur(6px);
  border-radius: var(--radius-full);
  font-size: var(--fs-xs);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: rgba(255,255,255,.85);
  margin-bottom: var(--space-6);
}
.hero-eyebrow::before { content: ''; width: 8px; height: 8px; border-radius: 50%; background: var(--color-primary-500); box-shadow: 0 0 0 4px rgba(93,173,226,.25); }
.hero h1 { color: #fff; font-size: clamp(36px, 5vw, 56px); margin-bottom: var(--space-5); }
.hero-sub { font-size: clamp(16px, 1.8vw, 20px); line-height: var(--lh-snug); color: rgba(255,255,255,.85); margin-bottom: var(--space-8); max-width: 640px; }
.hero-cta { display: flex; gap: var(--space-4); flex-wrap: wrap; }
.hero-stats {
  margin-top: var(--space-12);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255,255,255,.15);
}
.hero-stat-label { font-size: var(--fs-xs); color: rgba(255,255,255,.7); letter-spacing: .08em; text-transform: uppercase; }
.hero-stat-value { font-size: clamp(24px, 3vw, 32px); font-weight: var(--fw-bold); color: #fff; margin-top: 6px; }

/* --------------------------------------------------------------------------
   内页 Banner（更小）
   -------------------------------------------------------------------------- */
.page-hero {
  background: var(--gradient-hero);
  color: #fff;
  padding: var(--space-16) 0 var(--space-12);
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(800px 400px at 90% 100%, rgba(93,173,226,.18), transparent 60%);
}
/* 内页 Banner 底图（b-02/b-03）：缺图时回退纯渐变 */
.page-hero > img.page-hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .30;
}
.page-hero-inner { position: relative; }
.page-hero h1 { color: #fff; font-size: clamp(28px, 4vw, 44px); margin-bottom: var(--space-3); }
.page-hero .lead { font-size: var(--fs-lg); color: rgba(255,255,255,.85); max-width: 720px; margin: 0; }
.breadcrumb {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: var(--fs-xs); color: rgba(255,255,255,.7);
  margin-bottom: var(--space-4);
}
.breadcrumb a { color: rgba(255,255,255,.7); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb .sep { opacity: .5; }

/* --------------------------------------------------------------------------
   能力条 / 数据条
   -------------------------------------------------------------------------- */
.capability-bar {
  background: var(--color-bg-soft);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-10) 0;
}
.capability-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-6); }
.cap-item { display: flex; align-items: center; gap: var(--space-4); }
.cap-icon {
  flex-shrink: 0;
  width: 48px; height: 48px;
  display: grid; place-items: center;
  background: var(--color-bg);
  border: 1px solid var(--color-primary-100);
  color: var(--color-primary-700);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}
.cap-icon svg { width: 22px; height: 22px; stroke: currentColor; }
.cap-text { line-height: var(--lh-snug); }
.cap-text strong { display: block; color: var(--color-text); font-size: var(--fs-base); font-weight: var(--fw-semibold); margin-bottom: 2px; }
.cap-text small { color: var(--color-text-muted); font-size: var(--fs-xs); }

.stats-bar { padding: var(--space-12) 0; }
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-8); }
.stat-card {
  text-align: center;
  padding: var(--space-8) var(--space-4);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--t-base);
}
.stat-card:hover { border-color: var(--color-primary-500); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.stat-num { font-size: clamp(32px, 4vw, 48px); font-weight: var(--fw-bold); color: var(--color-primary-700); line-height: 1; }
.stat-num sup { font-size: .5em; color: var(--color-primary-600); margin-left: 4px; }
.stat-label { margin-top: var(--space-2); font-size: var(--fs-sm); color: var(--color-text-muted); }

/* --------------------------------------------------------------------------
   应用领域标签
   -------------------------------------------------------------------------- */
.app-tags { display: flex; flex-wrap: wrap; gap: var(--space-3); justify-content: center; }
.app-tag {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: 10px 18px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  transition: all var(--t-base);
}
.app-tag:hover {
  background: var(--color-primary-800);
  color: #fff;
  border-color: var(--color-primary-800);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.app-tag .arrow { transition: transform var(--t-base); }
.app-tag:hover .arrow { transform: translateX(3px); }

/* --------------------------------------------------------------------------
   CTA 区（深蓝底反白）
   -------------------------------------------------------------------------- */
.cta-band {
  background: var(--gradient-hero);
  color: #fff;
  border-radius: var(--radius-2xl);
  padding: var(--space-16);
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: '';
  position: absolute;
  right: -80px; top: -80px;
  width: 320px; height: 320px;
  background: radial-gradient(circle, rgba(93,173,226,.3), transparent 70%);
}
.cta-band h2 { color: #fff; margin-bottom: var(--space-3); }
.cta-band .lead { font-size: var(--fs-lg); color: rgba(255,255,255,.85); margin-bottom: var(--space-8); max-width: 640px; }
.cta-actions { display: flex; gap: var(--space-4); flex-wrap: wrap; }

/* --------------------------------------------------------------------------
   页脚
   -------------------------------------------------------------------------- */
.site-footer {
  background: var(--color-primary-900);
  color: rgba(255,255,255,.85);
  padding: var(--space-16) 0 var(--space-6);
  margin-top: var(--space-20);
}
.site-footer a { color: rgba(255,255,255,.85); }
.site-footer a:hover { color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: var(--space-10); margin-bottom: var(--space-12); }
.footer-brand { display: flex; align-items: center; gap: var(--space-3); color: #fff; font-weight: var(--fw-bold); font-size: var(--fs-lg); margin-bottom: var(--space-4); }
.footer-brand-logo { width: 36px; height: 36px; background: rgba(255,255,255,.12); border-radius: var(--radius-md); display: grid; place-items: center; }
.footer-about { color: rgba(255,255,255,.7); line-height: var(--lh-normal); font-size: var(--fs-sm); max-width: 360px; }
.footer-title { color: #fff; font-size: var(--fs-sm); font-weight: var(--fw-semibold); letter-spacing: .04em; margin-bottom: var(--space-4); text-transform: uppercase; }
.footer-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: var(--space-3); font-size: var(--fs-sm); }
.footer-list a { color: rgba(255,255,255,.7); transition: color var(--t-fast); }
.footer-list a:hover { color: #fff; }
.footer-bottom {
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255,255,255,.12);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--fs-xs);
  color: rgba(255,255,255,.55);
}

/* --------------------------------------------------------------------------
   悬浮转化条（右侧固定）
   -------------------------------------------------------------------------- */
.floating-bar {
  position: fixed;
  right: 20px;
  bottom: 24px;
  z-index: 90;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.fab {
  position: relative;
  width: 52px; height: 52px;
  display: grid; place-items: center;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  color: var(--color-primary-700);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  transition: all var(--t-base);
  text-decoration: none;
}
.fab:hover {
  background: var(--gradient-primary);
  color: #fff;
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-blue);
}
.fab svg { width: 22px; height: 22px; stroke: currentColor; }
.fab-tip {
  position: absolute;
  right: calc(100% + 12px);
  top: 50%; transform: translateY(-50%);
  background: var(--color-text);
  color: #fff;
  padding: 6px 12px;
  border-radius: var(--radius);
  font-size: var(--fs-xs);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-base);
}
.fab-tip::after {
  content: '';
  position: absolute;
  left: 100%; top: 50%;
  transform: translateY(-50%);
  border: 6px solid transparent;
  border-left-color: var(--color-text);
}
.fab:hover .fab-tip { opacity: 1; }

/* --------------------------------------------------------------------------
   通用工具类
   -------------------------------------------------------------------------- */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.text-primary { color: var(--color-primary-700); }
.bg-soft { background: var(--color-bg-soft); }
.bg-blue { background: var(--color-bg-blue); }
.bg-grad { background: var(--gradient-primary); -webkit-background-clip: text; background-clip: text; color: transparent; }
.divider-grad {
  width: 64px; height: 4px; border-radius: var(--radius-full);
  background: var(--gradient-primary);
  margin-bottom: var(--space-5);
}
.divider-grad.center { margin-left: auto; margin-right: auto; }
.eyebrow {
  display: inline-block;
  font-size: var(--fs-xs);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--color-primary-700);
  font-weight: var(--fw-semibold);
  margin-bottom: var(--space-3);
}
.section-head { text-align: center; margin-bottom: var(--space-12); }
.section-head h2 { margin-bottom: var(--space-3); }
.section-head .lead { color: var(--color-text-muted); font-size: var(--fs-lg); max-width: 720px; margin: 0 auto; }

/* --------------------------------------------------------------------------
   图片占位（CSS 渐变 + 几何 — 后续用 AI 图替换）
   -------------------------------------------------------------------------- */
.ph {
  position: relative;
  display: grid;
  place-items: center;
  background: var(--gradient-primary);
  color: rgba(255,255,255,.85);
  border-radius: var(--radius-lg);
  overflow: hidden;
  font-size: var(--fs-xs);
  letter-spacing: .08em;
  text-transform: uppercase;
}
.ph::before {
  content: '';
  position: absolute; inset: 0;
  background:
    repeating-linear-gradient(45deg, rgba(255,255,255,.04) 0 8px, transparent 8px 16px);
}
.ph::after {
  content: '';
  position: absolute;
  width: 60%; height: 60%;
  background: radial-gradient(circle, rgba(255,255,255,.18), transparent 70%);
}
.ph-tag {
  position: absolute;
  top: 12px; left: 12px;
  padding: 4px 10px;
  background: rgba(0,0,0,.4);
  border-radius: var(--radius-sm);
  font-size: 10px;
  letter-spacing: .12em;
  z-index: 1;
}
.ph-dim {
  position: absolute;
  bottom: 12px; right: 12px;
  padding: 4px 10px;
  background: rgba(255,255,255,.16);
  backdrop-filter: blur(4px);
  border-radius: var(--radius-sm);
  font-size: 10px;
  z-index: 1;
}
.ph-h-banner   { aspect-ratio: 16/6; min-height: 320px; }     /* 1920x720 */
.ph-h-card     { aspect-ratio: 4/3; min-height: 220px; }      /* 800x600 */
.ph-h-cat      { aspect-ratio: 2/1; min-height: 200px; }      /* 1200x600 */
.ph-h-sku      { aspect-ratio: 1/1; min-height: 200px; }      /* 1200x1200 */
.ph-h-scene    { aspect-ratio: 2/1; min-height: 200px; }      /* 1200x600 */
.ph-h-team     { aspect-ratio: 3/2; min-height: 180px; }      /* 1200x800 */

/* --------------------------------------------------------------------------
   表单
   -------------------------------------------------------------------------- */
.form-group { margin-bottom: var(--space-5); }
.form-label { display: block; font-size: var(--fs-sm); font-weight: var(--fw-medium); color: var(--color-text); margin-bottom: var(--space-2); }
.form-label .req { color: var(--color-danger); margin-left: 2px; }
.form-input, .form-textarea, .form-select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  font-family: inherit;
  font-size: var(--fs-sm);
  color: var(--color-text);
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
.form-input:focus, .form-textarea:focus, .form-select:focus {
  outline: none;
  border-color: var(--color-primary-600);
  box-shadow: 0 0 0 3px rgba(46,134,222,.12);
}
.form-textarea { min-height: 120px; resize: vertical; }
.form-file {
  display: flex; align-items: center; gap: var(--space-3);
  padding: 12px 14px;
  border: 1px dashed var(--color-border-dark);
  border-radius: var(--radius);
  background: var(--color-bg-soft);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  cursor: pointer;
}
.form-file:hover { border-color: var(--color-primary-600); color: var(--color-primary-700); }
.form-help { font-size: var(--fs-xs); color: var(--color-text-muted); margin-top: 6px; }

/* --------------------------------------------------------------------------
   表格（产品参数表）
   -------------------------------------------------------------------------- */
.params-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.params-table th, .params-table td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  font-size: var(--fs-sm);
}
.params-table th {
  background: var(--color-bg-soft);
  color: var(--color-text);
  font-weight: var(--fw-semibold);
  width: 32%;
}
.params-table tr:last-child td, .params-table tr:last-child th { border-bottom: none; }
/* 参数表分组标题行 */
.params-group th {
  background: var(--color-primary-700);
  color: #fff;
  font-size: var(--fs-xs);
  letter-spacing: .08em;
  padding-top: 10px;
  padding-bottom: 10px;
}
.params-table a { color: var(--color-primary-700); text-decoration: underline; }

/* --------------------------------------------------------------------------
   筛选器
   -------------------------------------------------------------------------- */
.filter-bar {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  display: grid;
  /* 6 个下拉（类别/子类/材料/口径/波段/镀膜）+ 操作区；关键词搜索单独占一行 */
  grid-template-columns: repeat(6, 1fr) auto;
  gap: var(--space-4);
  align-items: end;
  margin-bottom: var(--space-8);
}
.filter-field label { display: block; font-size: var(--fs-xs); font-weight: var(--fw-semibold); color: var(--color-text-muted); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 6px; }
.filter-actions { display: flex; gap: var(--space-2); }
.filter-search { grid-column: 1 / -1; }

/* --------------------------------------------------------------------------
   面包屑（内页）
   -------------------------------------------------------------------------- */
.crumbs {
  display: flex; align-items: center; gap: 8px;
  font-size: var(--fs-sm); color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}
.crumbs a { color: var(--color-text-muted); }
.crumbs a:hover { color: var(--color-primary-700); }
.crumbs .sep { opacity: .5; }

/* --------------------------------------------------------------------------
   分页
   -------------------------------------------------------------------------- */
.pagination {
  display: flex; justify-content: center; gap: 6px;
  margin-top: var(--space-10);
}
.pagination a, .pagination span {
  min-width: 36px; height: 36px;
  display: grid; place-items: center;
  padding: 0 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text); font-size: var(--fs-sm);
  transition: all var(--t-fast);
}
.pagination a:hover { border-color: var(--color-primary-600); color: var(--color-primary-700); }
.pagination .is-active { background: var(--color-primary-700); color: #fff; border-color: var(--color-primary-700); }

/* --------------------------------------------------------------------------
   动画
   -------------------------------------------------------------------------- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-up { animation: fadeUp .6s var(--t-slow) both; }
.fade-up.delay-1 { animation-delay: .08s; }
.fade-up.delay-2 { animation-delay: .16s; }
.fade-up.delay-3 { animation-delay: .24s; }
.fade-up.delay-4 { animation-delay: .32s; }

/* --------------------------------------------------------------------------
   响应式断点
   -------------------------------------------------------------------------- */
@media (max-width: 1023px) {
  :root { --header-h: 64px; }
  .section { padding: var(--space-12) 0; }
  .section-lg { padding: var(--space-16) 0; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-6 { grid-template-columns: repeat(3, 1fr); }
  .capability-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .filter-bar { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 767px) {
  :root { --container-pad: 16px; --fs-5xl: 32px; --fs-4xl: 24px; --fs-3xl: 22px; }
  .nav-links, .nav-actions .btn { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.is-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--header-h); left: 0; right: 0;
    background: var(--color-bg);
    padding: var(--space-4) var(--container-pad);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    gap: var(--space-4);
    align-items: stretch;
  }
  .nav-links.is-open .nav-link { padding: var(--space-3) 0; border-bottom: 1px solid var(--color-border); }
  .nav-links.is-open .nav-link:last-child { border-bottom: none; }

  .hero { min-height: 480px; }
  .hero-stats { grid-template-columns: 1fr; gap: var(--space-3); }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .grid-6 { grid-template-columns: repeat(2, 1fr); }
  .capability-grid { grid-template-columns: 1fr; }
  .cap-item { gap: var(--space-3); }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-8); }
  .stats-grid { grid-template-columns: 1fr; }
  .cta-band { padding: var(--space-10) var(--space-6); border-radius: var(--radius-lg); }
  .filter-bar { grid-template-columns: 1fr 1fr; }
  .filter-actions { grid-column: 1 / -1; }
  .floating-bar { right: 12px; bottom: 16px; }
  .fab { width: 46px; height: 46px; }
  .fab-tip { display: none; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .hero-cta .btn { width: 100%; }
}