/* ============ 基础变量 ============ */
:root {
  --primary: #1a56db;
  --primary-dark: #1243b0;
  --primary-light: #5f97ff;
  --primary-lighter: #7ea6ff;
  --primary-end: #3b82f6;
  --primary-rgb: 26, 86, 219;
  --btn-radius: 8px;
  --dark: #0b1b33;
  --dark-2: #12294d;
  --text: #2b3445;
  --text-light: #6b7688;
  --bg: #ffffff;
  --bg-gray: #f5f8fc;
  --border: #e6ebf2;
  --radius: 12px;
  --shadow: 0 10px 30px rgba(11, 27, 51, .08);
  --shadow-lg: 0 20px 50px rgba(11, 27, 51, .15);
  --transition: all .3s ease;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ============ 按钮 ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 28px; border-radius: var(--btn-radius); font-size: 15px; font-weight: 600;
  transition: var(--transition); cursor: pointer; border: 1px solid transparent;
}
.btn-lg { padding: 16px 36px; font-size: 16px; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(var(--primary-rgb), .35); }
.btn-ghost { border-color: rgba(255, 255, 255, .6); color: #fff; background: rgba(255, 255, 255, .08); backdrop-filter: blur(6px); }
.btn-ghost:hover { background: rgba(255, 255, 255, .2); transform: translateY(-2px); }
.btn-white { background: #fff; color: var(--primary); }
.btn-white:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0, 0, 0, .2); }

/* ============ 导航 ============ */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 20px 0; transition: var(--transition);
}
.navbar.scrolled {
  background: rgba(255, 255, 255, .96); backdrop-filter: blur(10px);
  padding: 12px 0; box-shadow: 0 2px 20px rgba(11, 27, 51, .08);
}
.nav-inner { display: flex; align-items: center; gap: 40px; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-mark {
  width: 40px; height: 40px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-end));
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 16px; letter-spacing: .5px;
}
/* 上传的 Logo 图片（透明底 PNG 最佳） */
.logo-mark.logo-mark-img { background: #fff; padding: 3px; box-sizing: border-box; overflow: hidden; }
.logo-mark.logo-mark-img img { display: block; height: 100%; width: auto; max-width: 140px; object-fit: contain; }
/* 前台 Logo 拖拽调整（仅登录后台后生效，访客看不到）；虚线框只在按住 Logo 时显示 */
body.logo-editable .logo-mark {
  cursor: move; touch-action: none;
  transition: transform .15s ease;
}
body.logo-editable .logo-mark.logo-active { outline: 2px dashed var(--primary-light); outline-offset: 3px; }
body.logo-dragging { user-select: none; -webkit-user-select: none; }
body.logo-dragging .logo-mark { transition: none; }

/* Logo 调整工具条 */
.logo-edit-bar {
  position: fixed; left: 50%; bottom: 28px; transform: translateX(-50%);
  z-index: 3000; display: flex; align-items: center; gap: 14px;
  background: rgba(11, 27, 51, .92); color: #fff; padding: 10px 18px;
  border-radius: 999px; box-shadow: var(--shadow-lg);
  font-size: 13px; backdrop-filter: blur(6px); white-space: nowrap;
  opacity: 0; pointer-events: none; transition: opacity .2s ease;
}
.logo-edit-bar.show { opacity: 1; pointer-events: auto; }
.logo-edit-bar .tip { opacity: .82; }
.logo-edit-bar button { border: none; border-radius: 999px; padding: 6px 14px; font-size: 13px; cursor: pointer; font-family: inherit; }
.logo-edit-bar .save { background: var(--primary); color: #fff; font-weight: 600; }
.logo-edit-bar .save:hover { background: var(--primary-dark); }
.logo-edit-bar .reset { background: rgba(255, 255, 255, .14); color: #fff; }
.logo-edit-bar .reset:hover { background: rgba(255, 255, 255, .25); }
@media (max-width: 480px) {
  .logo-edit-bar { gap: 10px; padding: 8px 14px; bottom: 16px; max-width: calc(100vw - 24px); }
}
.logo-text { font-size: 19px; font-weight: 700; color: #fff; line-height: 1.2; display: flex; flex-direction: column; transition: var(--transition); }
.logo-text small { font-size: 10px; font-weight: 500; letter-spacing: 2px; opacity: .75; }
.navbar.scrolled .logo-text { color: var(--dark); }

.nav-links { display: flex; gap: 32px; margin-left: auto; }
.nav-links a {
  color: rgba(255, 255, 255, .9); font-size: 15px; font-weight: 500;
  position: relative; padding: 4px 0; transition: var(--transition);
}
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; width: 0; height: 2px;
  background: var(--primary); transition: var(--transition); border-radius: 2px;
}
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.navbar.scrolled .nav-links a { color: var(--text); }
.navbar.scrolled .nav-links a.active, .navbar.scrolled .nav-links a:hover { color: var(--primary); }
.nav-cta { padding: 10px 22px; font-size: 14px; }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 6px; }
.nav-toggle span { width: 24px; height: 2px; background: #fff; border-radius: 2px; transition: var(--transition); }
.navbar.scrolled .nav-toggle span { background: var(--dark); }

/* ============ Hero ============ */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center; color: #fff; overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(7, 20, 42, .88) 20%, rgba(10, 30, 66, .55) 60%, rgba(10, 30, 66, .25));
}
.hero-content { position: relative; z-index: 2; padding-top: 80px; max-width: 780px; }
.hero-tag { font-size: 13px; letter-spacing: 3px; color: var(--primary-lighter); font-weight: 600; margin-bottom: 20px; }
.hero h1 { font-size: clamp(38px, 5.5vw, 62px); font-weight: 800; line-height: 1.25; margin-bottom: 24px; }
.hero h1 .accent { color: var(--primary-light); position: relative; }
.hero-sub { font-size: 18px; color: rgba(255, 255, 255, .82); margin-bottom: 40px; max-width: 560px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* Hero 轮播 */
.hero-bg img.hero-slide {
  position: absolute; inset: 0; opacity: 0; transform: scale(1.06);
  transition: opacity 1.2s ease, transform 6s ease;
}
.hero-bg img.hero-slide.active { opacity: 1; transform: scale(1); }
.hero-dots { position: absolute; right: 48px; bottom: 42px; z-index: 3; display: flex; gap: 10px; }
.hero-dot {
  width: 26px; height: 4px; padding: 0; border: none; border-radius: 2px;
  background: rgba(255, 255, 255, .35); cursor: pointer; transition: var(--transition);
}
.hero-dot:hover, .hero-dot.active { background: #fff; }
@media (max-width: 768px) {
  .hero-dots { right: 50%; transform: translateX(50%); bottom: 96px; }
}

.hero-scroll {
  position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%); z-index: 2;
  width: 26px; height: 44px; border: 2px solid rgba(255, 255, 255, .5); border-radius: 14px;
}
.hero-scroll span {
  position: absolute; top: 8px; left: 50%; transform: translateX(-50%);
  width: 4px; height: 8px; background: #fff; border-radius: 2px;
  animation: scrollDot 1.8s ease-in-out infinite;
}
@keyframes scrollDot {
  0% { opacity: 1; top: 8px; }
  70% { opacity: 0; top: 24px; }
  100% { opacity: 0; top: 8px; }
}

/* ============ 数据统计 ============ */
.stats { background: var(--dark); color: #fff; padding: 56px 0; position: relative; z-index: 3; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-item { text-align: center; position: relative; }
.stat-item + .stat-item::before {
  content: ""; position: absolute; left: -12px; top: 15%; height: 70%; width: 1px;
  background: rgba(255, 255, 255, .12);
}
.stat-num { font-size: 42px; font-weight: 800; color: #fff; }
.stat-num em { font-style: normal; font-size: 20px; color: var(--primary-light); margin-left: 2px; }
.stat-item p { color: rgba(255, 255, 255, .6); font-size: 14px; margin-top: 4px; }

/* ============ 通用 Section ============ */
.section { padding: 100px 0; }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 64px; }
.section-tag { font-size: 13px; letter-spacing: 3px; color: var(--primary); font-weight: 700; margin-bottom: 12px; }
.section-head h2, .about-text h2, .cta-inner h2 { font-size: clamp(28px, 3.5vw, 38px); font-weight: 800; color: var(--dark); margin-bottom: 16px; }
.section-desc { color: var(--text-light); font-size: 16px; }

/* ============ 核心业务 ============ */
.services { background: var(--bg-gray); }
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.service-card {
  background: #fff; border-radius: var(--radius); padding: 36px 32px;
  border: 1px solid var(--border); transition: var(--transition); position: relative; overflow: hidden;
}
.service-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--primary-end));
  transform: scaleX(0); transform-origin: left; transition: var(--transition);
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.service-card:hover::before { transform: scaleX(1); }
.service-icon {
  width: 60px; height: 60px; border-radius: 14px; margin-bottom: 22px;
  background: linear-gradient(135deg, rgba(var(--primary-rgb), .1), rgba(var(--primary-rgb), .06));
  color: var(--primary); display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
}
.service-icon svg { width: 30px; height: 30px; }
.service-card:hover .service-icon { background: var(--primary); color: #fff; }
.service-card h3 { font-size: 19px; font-weight: 700; color: var(--dark); margin-bottom: 12px; }
.service-card p { font-size: 14.5px; color: var(--text-light); margin-bottom: 18px; }
.service-link { font-size: 14px; font-weight: 600; color: var(--primary); transition: var(--transition); }
.service-link:hover { letter-spacing: .5px; }

/* ============ 关于我们 ============ */
.about-inner { display: grid; grid-template-columns: 1fr 1.1fr; gap: 72px; align-items: center; }
.about-img { position: relative; }
.about-img img { border-radius: var(--radius); box-shadow: var(--shadow-lg); }
.about-badge {
  position: absolute; right: -24px; bottom: 40px; background: var(--primary); color: #fff;
  border-radius: var(--radius); padding: 22px 30px; text-align: center; box-shadow: var(--shadow-lg);
}
.about-badge strong { font-size: 36px; font-weight: 800; display: block; line-height: 1; }
.about-badge strong span { font-size: 16px; font-weight: 600; }
.about-badge p { font-size: 13px; opacity: .85; margin-top: 6px; }
.about-lead { font-size: 17px; font-weight: 600; color: var(--dark); margin-bottom: 14px; }
.about-text > p:not(.section-tag):not(.about-lead) { color: var(--text-light); font-size: 15px; margin-bottom: 20px; }
.about-points { margin: 8px 0 32px; }
.about-points li {
  display: flex; align-items: center; gap: 12px; padding: 10px 0;
  font-size: 15px; color: var(--text); font-weight: 500;
}
.about-points svg { width: 22px; height: 22px; color: var(--primary); flex-shrink: 0; background: rgba(var(--primary-rgb), .1); border-radius: 50%; padding: 4px; }

/* ============ 成功案例 ============ */
.cases { background: var(--bg-gray); }
.cases-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.case-card {
  background: #fff; border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow); transition: var(--transition);
}
.case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.case-img { position: relative; aspect-ratio: 16 / 9; overflow: hidden; }
.case-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.case-card:hover .case-img img { transform: scale(1.06); }
.case-cat {
  position: absolute; top: 16px; left: 16px; background: rgba(11, 27, 51, .75); backdrop-filter: blur(6px);
  color: #fff; font-size: 12px; font-weight: 600; padding: 6px 14px; border-radius: 20px;
}
.case-body { padding: 26px 26px 30px; }
.case-body h3 { font-size: 18px; font-weight: 700; color: var(--dark); margin-bottom: 10px; line-height: 1.5; }
.case-body p { font-size: 14px; color: var(--text-light); margin-bottom: 16px; }
.case-meta { display: flex; justify-content: space-between; font-size: 13px; color: var(--primary); font-weight: 600; border-top: 1px solid var(--border); padding-top: 14px; }
.case-meta span:last-child { color: var(--text-light); font-weight: 400; }

/* ============ 新闻 ============ */
.news-list { display: flex; flex-direction: column; gap: 16px; max-width: 900px; margin: 0 auto; }
.news-item {
  display: flex; align-items: center; gap: 28px; background: #fff;
  border: 1px solid var(--border); border-radius: var(--radius); padding: 26px 32px;
  transition: var(--transition);
}
.news-item:hover { border-color: var(--primary); box-shadow: var(--shadow); transform: translateX(6px); }
.news-date { text-align: center; flex-shrink: 0; border-right: 1px solid var(--border); padding-right: 28px; }
.news-date strong { display: block; font-size: 32px; font-weight: 800; color: var(--dark); line-height: 1.1; }
.news-date span { font-size: 13px; color: var(--text-light); }
.news-item:hover .news-date strong { color: var(--primary); }
.news-body { flex: 1; }
.news-body h3 { font-size: 17px; font-weight: 700; color: var(--dark); margin-bottom: 6px; }
.news-body p { font-size: 14px; color: var(--text-light); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.news-arrow { font-size: 22px; color: var(--text-light); transition: var(--transition); flex-shrink: 0; }
.news-item:hover .news-arrow { color: var(--primary); transform: translateX(4px); }

/* ============ CTA 横幅 ============ */
.cta-banner {
  background: linear-gradient(120deg, var(--primary-dark), var(--primary) 60%, var(--primary-end));
  color: #fff; padding: 72px 0;
}
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.cta-inner h2 { color: #fff; margin-bottom: 8px; }
.cta-inner p { color: rgba(255, 255, 255, .85); font-size: 16px; }

/* ============ 免费获取方案弹窗 ============ */
.plan-modal { position: fixed; inset: 0; z-index: 2000; display: flex; align-items: center; justify-content: center; padding: 24px; }
.plan-modal[hidden] { display: none; }
.plan-overlay { position: absolute; inset: 0; background: rgba(11, 27, 51, .55); backdrop-filter: blur(4px); opacity: 0; transition: opacity .2s ease; }
.plan-dialog {
  position: relative; width: min(560px, 100%); max-height: 86vh; overflow-y: auto;
  background: #fff; border-radius: var(--radius); padding: 40px 40px 36px;
  box-shadow: var(--shadow-lg); opacity: 0; transform: translateY(24px) scale(.97);
  transition: opacity .2s ease, transform .2s ease;
}
.plan-modal.open .plan-overlay { opacity: 1; }
.plan-modal.open .plan-dialog { opacity: 1; transform: none; }
.plan-dialog h3 { font-size: 24px; font-weight: 800; color: var(--dark); margin-bottom: 8px; padding-right: 32px; }
.plan-desc { color: var(--text-light); font-size: 15px; margin-bottom: 24px; }
.plan-items { list-style: none; margin: 0 0 28px; padding: 0; display: flex; flex-direction: column; gap: 16px; }
.plan-items li {
  display: flex; align-items: flex-start; gap: 16px;
  background: var(--bg-gray); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px 20px;
}
.plan-num {
  flex: none; width: 34px; height: 34px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-end));
  color: #fff; font-size: 13px; font-weight: 800;
  display: flex; align-items: center; justify-content: center; margin-top: 2px;
}
.plan-item-body strong { display: block; color: var(--dark); font-size: 16px; margin-bottom: 4px; }
.plan-item-body p { color: var(--text-light); font-size: 14px; line-height: 1.65; }
.plan-go { display: block; width: 100%; text-align: center; }
.plan-close {
  position: absolute; top: 14px; right: 14px; width: 36px; height: 36px;
  border: none; border-radius: 50%; background: var(--bg-gray); color: var(--text-light);
  font-size: 22px; line-height: 1; cursor: pointer; transition: var(--transition);
}
.plan-close:hover { background: var(--border); color: var(--dark); }

/* ============ 页脚 ============ */
.footer { background: var(--dark); color: rgba(255, 255, 255, .72); padding-top: 72px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr max-content; gap: 48px; padding-bottom: 56px; } /* 末列=联系我们，max-content 保证联系信息单行不折行 */
.footer-brand .logo { margin-bottom: 18px; }
.footer-brand .logo-text { color: #fff; }
.footer-brand p { font-size: 14px; max-width: 300px; }
.footer-col h4 { color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 20px; }
.footer-col a { display: block; font-size: 14px; padding: 5px 0; transition: var(--transition); white-space: nowrap; }
.footer-col a:hover { color: var(--primary-light); padding-left: 6px; }
.footer-col p { font-size: 14px; padding: 5px 0; }
/* 页脚二维码列（公众号 / 小程序 / 微信，有二维码时启用） */
.footer-grid.has-qr { grid-template-columns: 1.6fr 1fr 1fr max-content max-content; }
.footer-qr-row { display: flex; gap: 18px; flex-wrap: wrap; }
.footer-qr { margin: 0; text-align: center; }
.footer-qr img {
  display: block; width: 92px; height: 92px; object-fit: cover;
  background: #fff; border-radius: 8px; padding: 5px; box-sizing: border-box;
}
.footer-qr figcaption { font-size: 12px; color: rgba(255, 255, 255, .6); margin-top: 8px; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .1); padding: 22px 0; }
.footer-bottom p { font-size: 13px; color: rgba(255, 255, 255, .45); text-align: center; }
/* 页脚管理入口：低调显示，避免抢视线 */
.footer-bottom .admin-entry { margin-top: 10px; font-size: 12px; }
.footer-bottom .admin-entry a {
  color: rgba(255, 255, 255, .3);
  text-decoration: none;
  border-bottom: 1px dotted rgba(255, 255, 255, .2);
  transition: color .2s ease, border-color .2s ease;
}
.footer-bottom .admin-entry a:hover { color: rgba(255, 255, 255, .75); border-bottom-color: rgba(255, 255, 255, .5); }

/* ============ 进场动画 ============ */
.reveal { opacity: 0; transform: translateY(32px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ============ 响应式 ============ */
@media (max-width: 992px) {
  .services-grid, .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .about-inner { grid-template-columns: 1fr; gap: 48px; }
  .about-badge { right: 16px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
  .footer-grid.has-qr { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.open {
    display: flex; flex-direction: column; gap: 0; position: absolute;
    top: 100%; left: 0; right: 0; background: #fff; box-shadow: 0 20px 40px rgba(11, 27, 51, .12);
    padding: 12px 24px 20px;
  }
  .nav-links.open a { color: var(--text); padding: 14px 0; border-bottom: 1px solid var(--border); }
  .nav-links.open a:last-child { border-bottom: none; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 36px 24px; }
  .stat-item + .stat-item::before { display: none; }
  .services-grid, .cases-grid { grid-template-columns: 1fr; }
  .section { padding: 72px 0; }
  .news-item { gap: 18px; padding: 20px; }
  .news-date { padding-right: 18px; }
  .news-date strong { font-size: 24px; }
  .news-body p { white-space: normal; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-grid.has-qr { grid-template-columns: 1fr; }
  .cta-inner { text-align: center; justify-content: center; }
  .plan-dialog { padding: 28px 22px 24px; }
}