/* 销企通 静态官网 · 清爽浅色 / 域名备案展示 */

:root {
  --bg: #f5f8fc;
  --bg-subtle: linear-gradient(180deg, #fbfdff 0%, #eef3f9 45%, #f5f8fc 100%);
  --surface: #ffffff;
  --border: #e2e8f0;
  --border-hover: #c7d8ec;
  --text: #1e293b;
  --text-secondary: #64748b;
  --muted: #94a3b8;
  --accent: #2563eb;
  --accent-soft: #eff6ff;
  --accent-mid: #3b82f6;
  --accent-warm: #6366f1;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 16px 40px rgba(37, 99, 235, 0.08);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  background-image: var(--bg-subtle);
  position: relative;
  min-height: 100vh;
}

/* 背景：极淡网格 + 柔光 */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.12) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 85% 70% at 50% -10%, black 25%, transparent 70%);
  pointer-events: none;
}

.bg-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(100px);
  pointer-events: none;
  z-index: 0;
}
.bg-glow--1 {
  width: 420px;
  height: 420px;
  top: -80px;
  right: -60px;
  background: radial-gradient(circle, rgba(147, 197, 253, 0.55) 0%, transparent 72%);
  opacity: 0.65;
}
.bg-glow--2 {
  width: 320px;
  height: 320px;
  bottom: 10%;
  left: -80px;
  background: radial-gradient(circle, rgba(199, 210, 254, 0.45) 0%, transparent 72%);
  opacity: 0.55;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover {
  color: var(--accent-mid);
  text-decoration: underline;
}

.container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.site-header .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.12rem;
  color: var(--text);
  letter-spacing: 0.02em;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(145deg, #3b82f6 0%, #6366f1 100%);
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.brand-text {
  color: var(--text);
  background: none;
  -webkit-background-clip: unset;
  background-clip: unset;
}

.nav-anchors {
  display: flex;
  gap: 8px 26px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: none;
}
.nav-anchors a {
  color: var(--text-secondary);
  text-decoration: none;
}
.nav-anchors a:hover {
  color: var(--accent);
  text-decoration: none;
}

/* Hero */
.hero {
  position: relative;
  padding: 72px 0 64px;
  text-align: center;
}

.hero-eyebrow {
  margin: 0 0 16px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--accent);
  opacity: 0.9;
}

.hero h1 {
  margin: 0 auto 22px;
  font-size: clamp(1.75rem, 4.8vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.22;
  color: var(--text);
  max-width: 920px;
}

.hero-gradient {
  background: linear-gradient(105deg, #2563eb 0%, #4f46e5 50%, #0891b2 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero .lead {
  margin: 0 auto 32px;
  max-width: 640px;
  color: var(--text-secondary);
  font-size: 1.04rem;
  line-height: 1.75;
}

.hero .lead strong {
  color: var(--text);
  font-weight: 600;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-mid);
  box-shadow: 0 0 0 2px var(--accent-soft);
}

/* Glass / 浅色玻璃卡片 */
.glass {
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--border);
  border-radius: 20px;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
}

/* Intro */
.section-intro {
  padding: 16px 0 40px;
}

.intro-panel {
  padding: 36px 40px 40px;
}

.section-title--left {
  text-align: left;
  margin: 0 0 16px;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.intro-copy {
  margin: 0;
  font-size: 1.02rem;
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 900px;
}

.text-accent {
  color: var(--accent);
  font-weight: 600;
}

/* Features */
.section-features {
  padding: 48px 0 64px;
}

.section-features .container {
  padding-top: 8px;
}

.section-eyebrow {
  text-align: center;
  margin: 0 0 6px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-mid);
}

.section-title {
  text-align: center;
  margin: 0 0 12px;
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
}

.section-desc {
  text-align: center;
  margin: 0 auto 40px;
  max-width: 520px;
  color: var(--muted);
  font-size: 14px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

@media (max-width: 900px) {
  .grid-3 {
    grid-template-columns: 1fr;
  }
  .nav-anchors {
    display: none;
  }
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px 20px;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}
.card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}

.card p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.65;
}

.card-icon {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: var(--accent-soft);
  border: 1px solid #dbeafe;
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

/* Roles */
.section-roles {
  padding: 24px 0 80px;
}

.dual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

@media (max-width: 768px) {
  .dual {
    grid-template-columns: 1fr;
  }
}

.dual-card {
  position: relative;
  padding: 28px 28px 30px;
  overflow: hidden;
  padding-left: 32px;
}

.dual-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, #3b82f6, #6366f1);
  border-radius: 4px 0 0 4px;
  opacity: 1;
}

.dual-card:nth-child(2)::before {
  background: linear-gradient(180deg, #6366f1, #0ea5e9);
}

.dual-card__label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-mid);
  margin-bottom: 6px;
}

.dual-card__label--alt {
  color: var(--accent-warm);
}

.dual-card h3 {
  margin: 0 0 14px;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
}

.dual-card ul {
  margin: 0;
  padding-left: 18px;
  color: var(--text-secondary);
  font-size: 14px;
}

.dual-card li {
  margin-bottom: 8px;
}
.dual-card li::marker {
  color: var(--accent-mid);
}

/* Footer */
.site-footer {
  position: relative;
  z-index: 1;
  background: #eef2f7;
  border-top: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 44px 0 32px;
  font-size: 13px;
}

.footer-main {
  text-align: center;
}

.site-footer .site-name {
  margin: 0 0 8px;
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text);
  background: none;
  -webkit-background-clip: unset;
  background-clip: unset;
}

.footer-tagline {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 13px;
}

.site-footer .icp {
  margin: 0;
  line-height: 2;
}

.site-footer .icp strong {
  color: var(--text-secondary);
  font-weight: 600;
}

.hint-replace {
  margin-top: 14px !important;
  color: #b45309;
  font-size: 12px;
}