/* ============================================================
   湖南中普互联电子商务有限公司 官网样式
   科技风 · 深色主题 · PC/移动端自适应
   ============================================================ */

:root {
  --bg: #070b14;
  --bg-2: #0b1220;
  --card: #0e1930;
  --card-2: #101d38;
  --line: rgba(0, 212, 255, .16);
  --line-soft: rgba(142, 163, 191, .14);
  --cyan: #00d4ff;
  --blue: #2f7cff;
  --purple: #7b61ff;
  --text: #e6f1ff;
  --muted: #8ea3bf;
  --muted-2: #5c7396;
  --grad: linear-gradient(90deg, #00d4ff, #2f7cff 55%, #7b61ff);
  --grad-soft: linear-gradient(135deg, rgba(0, 212, 255, .12), rgba(123, 97, 255, .12));
  --shadow-glow: 0 0 24px rgba(0, 212, 255, .25);
  --radius: 14px;
  --nav-h: 72px;
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { overflow-x: clip; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; }

.container { width: min(1200px, 92%); margin: 0 auto; }

/* ---------------- 背景装饰 ---------------- */
.bg-grid {
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background-image:
    linear-gradient(rgba(0, 212, 255, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, .045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 30%, transparent 100%);
}
#particles { position: fixed; inset: 0; z-index: -1; pointer-events: none; }

/* ---------------- 顶部导航 ---------------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--nav-h);
  background: rgba(7, 11, 20, .72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, background .3s;
}
.nav.scrolled { border-bottom-color: var(--line); background: rgba(7, 11, 20, .92); }
.nav-inner { height: var(--nav-h); display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.logo { display: flex; align-items: center; gap: 12px; font-weight: 700; }
.logo-mark {
  width: 40px; height: 40px; border-radius: 10px; flex: none;
  background: var(--grad); display: grid; place-items: center;
  font-size: 20px; font-weight: 800; color: #04101f;
  box-shadow: var(--shadow-glow);
}
.logo-text { line-height: 1.25; }
.logo-text strong { display: block; font-size: 17px; letter-spacing: 1px; }
.logo-text span { display: block; font-size: 11px; color: var(--muted); letter-spacing: 2.5px; }
.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
  padding: 8px 14px; border-radius: 8px; font-size: 15px; color: var(--muted);
  transition: color .25s, background .25s;
}
.nav-links a:hover { color: var(--text); background: rgba(0, 212, 255, .08); }
.nav-links a.active { color: var(--cyan); }
.nav-cta {
  margin-left: 10px; padding: 9px 20px !important; border-radius: 999px !important;
  background: var(--grad); color: #04101f !important; font-weight: 700;
  box-shadow: 0 4px 18px rgba(0, 212, 255, .35);
}
.nav-cta:hover { background: var(--grad); filter: brightness(1.1); }
.nav-toggle {
  display: none; background: none; border: 1px solid var(--line); border-radius: 8px;
  width: 42px; height: 42px; cursor: pointer; position: relative;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: ""; display: block; width: 20px; height: 2px; border-radius: 2px;
  background: var(--cyan); margin: 0 auto; position: relative; transition: transform .3s, opacity .3s;
}
.nav-toggle span::before { position: absolute; top: -6px; }
.nav-toggle span::after { position: absolute; top: 6px; }
.nav.open .nav-toggle span { background: transparent; }
.nav.open .nav-toggle span::before { transform: translateY(6px) rotate(45deg); }
.nav.open .nav-toggle span::after { transform: translateY(-6px) rotate(-45deg); }

/* ---------------- 通用区块 ---------------- */
section { padding: 96px 0; position: relative; }
.section-head { text-align: center; margin-bottom: 56px; }
.section-tag {
  display: inline-block; padding: 6px 18px; border-radius: 999px; font-size: 13px;
  letter-spacing: 3px; color: var(--cyan); border: 1px solid var(--line);
  background: rgba(0, 212, 255, .06); margin-bottom: 18px;
}
.section-title { font-size: clamp(26px, 4vw, 38px); font-weight: 800; letter-spacing: 1px; }
.section-title em {
  font-style: normal;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.section-desc { max-width: 720px; margin: 14px auto 0; color: var(--muted); font-size: 15px; }

.btn {
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer;
  padding: 13px 30px; border-radius: 999px; font-size: 15px; font-weight: 700;
  border: none; transition: transform .25s, box-shadow .25s, filter .25s;
}
.btn-primary { background: var(--grad); color: #04101f; box-shadow: 0 6px 24px rgba(0, 212, 255, .35); }
.btn-primary:hover { transform: translateY(-2px); filter: brightness(1.12); }
.btn-ghost { border: 1px solid var(--line); color: var(--cyan); background: rgba(0, 212, 255, .05); }
.btn-ghost:hover { background: rgba(0, 212, 255, .12); transform: translateY(-2px); }

/* ---------------- Hero ---------------- */
.hero {
  min-height: 100vh; display: flex; align-items: center;
  padding: calc(var(--nav-h) + 60px) 0 80px; overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(600px 320px at 18% 20%, rgba(47, 124, 255, .18), transparent 70%),
    radial-gradient(700px 360px at 82% 30%, rgba(123, 97, 255, .16), transparent 70%),
    radial-gradient(500px 300px at 50% 90%, rgba(0, 212, 255, .10), transparent 70%);
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; padding: 7px 16px;
  border: 1px solid var(--line); border-radius: 999px; font-size: 13px; color: var(--cyan);
  background: rgba(0, 212, 255, .06); margin-bottom: 26px;
}
.hero-badge i {
  width: 7px; height: 7px; border-radius: 50%; background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan); animation: pulse 1.6s infinite;
}
@keyframes pulse { 50% { opacity: .35; } }
.hero h1 { font-size: clamp(32px, 5.4vw, 58px); line-height: 1.22; font-weight: 800; letter-spacing: 1px; }
.hero h1 em {
  font-style: normal;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { margin: 22px 0 36px; max-width: 640px; color: var(--muted); font-size: clamp(15px, 1.6vw, 17px); }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-tags { margin-top: 44px; display: flex; gap: 12px; flex-wrap: wrap; }
.hero-tags li {
  padding: 7px 16px; font-size: 13px; color: var(--muted);
  border: 1px solid var(--line-soft); border-radius: 8px; background: rgba(14, 25, 48, .6);
}
.hero-tags li b { color: var(--cyan); font-weight: 600; }

/* ---------------- 数据带 ---------------- */
.stats { padding: 0; }
.stats-inner {
  display: grid; grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line); border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(14, 25, 48, .9), rgba(10, 18, 34, .9));
  box-shadow: 0 20px 60px rgba(0, 0, 0, .35);
  overflow: hidden;
}
.stat { padding: 40px 20px; text-align: center; position: relative; }
.stat + .stat::before {
  content: ""; position: absolute; left: 0; top: 22%; bottom: 22%; width: 1px;
  background: linear-gradient(180deg, transparent, var(--line), transparent);
}
.stat-num { font-size: clamp(30px, 3.6vw, 44px); font-weight: 800; color: var(--cyan); font-variant-numeric: tabular-nums; }
.stat-num small { font-size: .5em; margin-left: 2px; color: var(--blue); }
.stat-label { margin-top: 6px; color: var(--muted); font-size: 14px; letter-spacing: 1px; }

/* ---------------- 卡片通用 ---------------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.card {
  background: linear-gradient(180deg, var(--card), var(--card-2));
  border: 1px solid var(--line-soft); border-radius: var(--radius);
  padding: 32px 28px; position: relative; overflow: hidden;
  transition: transform .3s, border-color .3s, box-shadow .3s;
}
.card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: var(--grad); opacity: 0; transition: opacity .3s;
}
.card:hover { transform: translateY(-6px); border-color: var(--line); box-shadow: 0 16px 44px rgba(0, 0, 0, .45), var(--shadow-glow); }
.card:hover::before { opacity: 1; }
.card-icon {
  width: 54px; height: 54px; border-radius: 12px; display: grid; place-items: center;
  background: var(--grad-soft); border: 1px solid var(--line); margin-bottom: 20px;
  color: var(--cyan);
}
.card-icon svg { width: 26px; height: 26px; }
.card h3 { font-size: 19px; margin-bottom: 10px; letter-spacing: .5px; }
.card p { color: var(--muted); font-size: 14px; }
.card .card-list { margin-top: 14px; display: flex; flex-wrap: wrap; gap: 8px; }
.card .card-list li {
  font-size: 12px; color: var(--muted); padding: 4px 10px;
  border: 1px solid var(--line-soft); border-radius: 6px; background: rgba(7, 11, 20, .5);
}

/* ---------------- 案例 ---------------- */
.case-card { padding: 0; display: flex; flex-direction: column; }
.case-cover {
  height: 190px; position: relative; overflow: hidden;
  display: grid; place-items: center;
  background:
    radial-gradient(300px 160px at 80% 10%, rgba(0, 212, 255, .25), transparent 70%),
    radial-gradient(260px 160px at 15% 90%, rgba(123, 97, 255, .28), transparent 70%),
    linear-gradient(135deg, #0d1a33, #101d38);
}
.case-cover::after {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(0, 212, 255, .08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, .08) 1px, transparent 1px);
  background-size: 28px 28px;
}
.case-cover .glyph {
  font-size: 44px; font-weight: 800; letter-spacing: 2px; color: rgba(0, 212, 255, .9);
  text-shadow: 0 0 30px rgba(0, 212, 255, .6); z-index: 1;
}
.case-body { padding: 26px 26px 28px; display: flex; flex-direction: column; flex: 1; }
.case-tags { display: flex; gap: 8px; margin-bottom: 12px; flex-wrap: wrap; }
.case-tags li {
  font-size: 12px; color: var(--cyan); padding: 3px 10px; border-radius: 6px;
  background: rgba(0, 212, 255, .08); border: 1px solid var(--line);
}
.case-body h3 { font-size: 18px; margin-bottom: 8px; }
.case-body p { color: var(--muted); font-size: 14px; flex: 1; }
.case-metrics { margin-top: 16px; display: flex; gap: 22px; border-top: 1px dashed var(--line-soft); padding-top: 14px; }
.case-metrics b { display: block; color: var(--cyan); font-size: 17px; }
.case-metrics span { font-size: 12px; color: var(--muted-2); }

/* ---------------- 服务流程 ---------------- */
.process { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; counter-reset: step; }
.step { text-align: center; position: relative; padding: 0 6px; }
.step::before {
  counter-increment: step; content: "0" counter(step);
  display: grid; place-items: center; width: 62px; height: 62px; margin: 0 auto 16px;
  border-radius: 50%; border: 1px solid var(--line); font-size: 20px; font-weight: 800; color: var(--cyan);
  background: radial-gradient(circle at 30% 30%, rgba(0, 212, 255, .18), rgba(10, 18, 34, .9));
  box-shadow: var(--shadow-glow);
}
.step::after {
  content: ""; position: absolute; top: 31px; left: calc(50% + 40px); width: calc(100% - 80px);
  height: 1px; background: linear-gradient(90deg, var(--line), transparent);
}
.step:last-child::after { display: none; }
.step h3 { font-size: 16px; margin-bottom: 6px; }
.step p { font-size: 13px; color: var(--muted); }

/* ---------------- 荣誉 ---------------- */
.honor-card { text-align: center; padding: 36px 24px; }
.honor-medal {
  width: 72px; height: 72px; margin: 0 auto 18px; border-radius: 50%;
  display: grid; place-items: center; color: #ffd76a;
  background: radial-gradient(circle at 32% 30%, rgba(255, 215, 106, .22), rgba(10, 18, 34, .95));
  border: 1px solid rgba(255, 215, 106, .35);
  box-shadow: 0 0 26px rgba(255, 215, 106, .18);
}
.honor-medal svg { width: 32px; height: 32px; }
.honor-card h3 { font-size: 17px; margin-bottom: 8px; }
.honor-card p { font-size: 13px; color: var(--muted); }
.honor-card .honor-year { display: inline-block; margin-top: 14px; font-size: 12px; color: var(--cyan); border: 1px solid var(--line); border-radius: 999px; padding: 3px 12px; }

/* ---------------- 合作伙伴 ---------------- */
.partners { display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; }
.partner {
  height: 72px; display: grid; place-items: center; font-size: 15px; letter-spacing: 2px;
  color: var(--muted); border: 1px solid var(--line-soft); border-radius: 10px;
  background: rgba(14, 25, 48, .55); transition: color .3s, border-color .3s, transform .3s;
}
.partner:hover { color: var(--cyan); border-color: var(--line); transform: translateY(-3px); }

/* ---------------- CTA ---------------- */
.cta {
  border: 1px solid var(--line); border-radius: 20px; padding: 56px 40px; text-align: center;
  background:
    radial-gradient(500px 220px at 20% 0%, rgba(0, 212, 255, .14), transparent 70%),
    radial-gradient(500px 220px at 80% 100%, rgba(123, 97, 255, .16), transparent 70%),
    linear-gradient(180deg, var(--card), var(--card-2));
}
.cta h2 { font-size: clamp(22px, 3.4vw, 32px); margin-bottom: 12px; }
.cta p { color: var(--muted); margin-bottom: 30px; }

/* ---------------- 页脚 ---------------- */
footer { border-top: 1px solid var(--line-soft); background: rgba(7, 11, 20, .85); padding: 60px 0 0; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 44px; }
.footer-grid h4 { font-size: 15px; margin-bottom: 18px; letter-spacing: 1px; color: var(--text); }
.footer-grid p, .footer-grid a { color: var(--muted); font-size: 14px; }
.footer-grid ul li { margin-bottom: 10px; }
.footer-grid ul a:hover { color: var(--cyan); }
.footer-qr { display: flex; gap: 16px; }
.footer-qr figure { text-align: center; }
.footer-qr img { width: 96px; height: 96px; border-radius: 10px; border: 1px solid var(--line); padding: 4px; background: #fff; }
.footer-qr figcaption { font-size: 12px; color: var(--muted-2); margin-top: 6px; }
.footer-bottom {
  border-top: 1px solid var(--line-soft); padding: 18px 0; text-align: center;
  color: var(--muted-2); font-size: 13px;
}
.footer-bottom a:hover { color: var(--cyan); }

/* ---------------- 子页 Banner ---------------- */
.page-banner {
  padding: calc(var(--nav-h) + 70px) 0 64px; text-align: center; position: relative; overflow: hidden;
}
.page-banner::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(600px 260px at 30% 20%, rgba(47, 124, 255, .16), transparent 70%),
    radial-gradient(600px 260px at 75% 40%, rgba(123, 97, 255, .14), transparent 70%);
}
.page-banner h1 { font-size: clamp(28px, 4vw, 42px); font-weight: 800; }
.page-banner h1 em { font-style: normal; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.page-banner p { color: var(--muted); margin-top: 12px; }
.crumbs { margin-top: 16px; font-size: 13px; color: var(--muted-2); }
.crumbs a:hover { color: var(--cyan); }
.crumbs i { font-style: normal; margin: 0 8px; color: var(--muted-2); }

/* ---------------- 新闻 ---------------- */
.news-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.news-card { display: flex; gap: 22px; align-items: flex-start; }
.news-date {
  flex: none; width: 74px; text-align: center; border: 1px solid var(--line); border-radius: 12px;
  padding: 10px 0; background: rgba(0, 212, 255, .05);
}
.news-date b { display: block; font-size: 24px; color: var(--cyan); line-height: 1.2; }
.news-date span { font-size: 12px; color: var(--muted); }
.news-card h3 { font-size: 17px; margin-bottom: 8px; transition: color .25s; }
.news-card:hover h3 { color: var(--cyan); }
.news-card p { color: var(--muted); font-size: 14px; }
.news-card .news-tag { display: inline-block; font-size: 12px; color: var(--purple); border: 1px solid rgba(123, 97, 255, .4); border-radius: 6px; padding: 2px 10px; margin-bottom: 10px; }

/* ---------------- 联系页 ---------------- */
.contact-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 32px; align-items: stretch; }
.contact-info { display: flex; flex-direction: column; gap: 20px; }
.contact-info .card { flex: 1; display: flex; gap: 18px; align-items: flex-start; padding: 26px; }
.contact-info .card-icon { margin-bottom: 0; flex: none; }
.contact-info h3 { font-size: 16px; margin-bottom: 4px; }
.contact-info p { font-size: 14px; }
.qr-panel { padding: 34px; text-align: center; }
.qr-panel h3 { font-size: 18px; margin-bottom: 6px; }
.qr-panel > p { color: var(--muted); font-size: 14px; margin-bottom: 24px; }
.qr-row { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.qr-item { border: 1px solid var(--line-soft); border-radius: 12px; padding: 16px; background: rgba(7, 11, 20, .5); }
.qr-item img { width: 100%; border-radius: 10px; background: #fff; padding: 6px; }
.qr-item figcaption { margin-top: 10px; font-size: 13px; color: var(--muted); }

/* ---------------- 关于页 ---------------- */
.about-intro { display: grid; grid-template-columns: 1.2fr .8fr; gap: 32px; align-items: stretch; }
.about-intro .card { padding: 36px; }
.about-intro h3 { font-size: 22px; margin-bottom: 14px; }
.about-intro p { color: var(--muted); font-size: 15px; margin-bottom: 12px; }
.milestone { border-left: 2px solid var(--line); padding-left: 26px; position: relative; }
.milestone li { position: relative; padding-bottom: 26px; }
.milestone li::before {
  content: ""; position: absolute; left: -33px; top: 6px; width: 12px; height: 12px; border-radius: 50%;
  background: var(--bg); border: 2px solid var(--cyan); box-shadow: 0 0 12px rgba(0, 212, 255, .5);
}
.milestone b { color: var(--cyan); font-size: 15px; }
.milestone p { color: var(--muted); font-size: 14px; }

/* ---------------- 滚动显现动画 ---------------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: .1s; }
.reveal[data-delay="2"] { transition-delay: .2s; }
.reveal[data-delay="3"] { transition-delay: .3s; }
.reveal[data-delay="4"] { transition-delay: .4s; }
.reveal[data-delay="5"] { transition-delay: .5s; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .process { grid-template-columns: repeat(3, 1fr); row-gap: 36px; }
  .step::after { display: none; }
  .partners { grid-template-columns: repeat(4, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  section { padding: 64px 0; }
  .nav-toggle { display: block; }
  .nav-links {
    position: fixed; top: var(--nav-h); left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 4px;
    background: rgba(7, 11, 20, .98); border-bottom: 1px solid var(--line);
    padding: 16px 5% 24px; transform: translateY(-12px); opacity: 0; visibility: hidden;
    transition: transform .3s, opacity .3s, visibility .3s;
  }
  .nav.open .nav-links { transform: none; opacity: 1; visibility: visible; }
  .nav-links a { padding: 12px 14px; }
  .nav-cta { margin-left: 0; text-align: center; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3)::before { display: none; }
  .stat { padding: 26px 12px; }
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .process { grid-template-columns: repeat(2, 1fr); }
  .partners { grid-template-columns: repeat(2, 1fr); }
  .news-list { grid-template-columns: 1fr; }
  .contact-grid, .about-intro { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .hero { min-height: auto; }
  .logo-text span { display: none; }
}
@media (max-width: 420px) {
  .qr-row { grid-template-columns: 1fr; }
  .process { grid-template-columns: 1fr; }
  .stats-inner { grid-template-columns: 1fr 1fr; }
}