/* ============================================================
   简汇云科技官网样式
   ============================================================ */

:root {
  --primary: #0b5fff;
  --primary-dark: #0047d6;
  --cyan: #16c5ff;
  --dark: #0a1633;
  --dark-2: #10224d;
  --text: #1f2733;
  --text-light: #5b6675;
  --text-muted: #8a94a6;
  --bg: #ffffff;
  --bg-alt: #f4f7fc;
  --border: #e6ebf3;
  --radius: 14px;
  --shadow-sm: 0 4px 14px rgba(16, 34, 77, 0.06);
  --shadow: 0 14px 40px rgba(16, 34, 77, 0.10);
  --shadow-lg: 0 24px 60px rgba(16, 34, 77, 0.16);
  --header-h: 72px;
}

* { 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; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; font-size: 15px; }

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

/* ---------------- 按钮 ---------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 12px 30px; border-radius: 999px; font-size: 15px; font-weight: 600;
  transition: all .25s ease; white-space: nowrap; cursor: pointer;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), #2f7bff);
  color: #fff; box-shadow: 0 8px 22px rgba(11, 95, 255, .32);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(11, 95, 255, .42); }
.btn-outline { border: 1.5px solid var(--primary); color: var(--primary); background: transparent; }
.btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
.btn-sm { padding: 9px 22px; font-size: 14px; }
.btn-block { width: 100%; margin-top: 6px; }

/* ---------------- 导航 ---------------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--header-h);
  transition: all .3s ease;
}
.site-header.scrolled {
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(14px);
  box-shadow: 0 2px 18px rgba(16, 34, 77, .08);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); }
.brand { display: flex; align-items: center; gap: 10px; }
.brand-logo {
  width: 40px; height: 40px; border-radius: 11px;
  background: linear-gradient(135deg, var(--primary), var(--cyan));
  color: #fff; font-weight: 800; font-size: 20px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 6px 16px rgba(11, 95, 255, .35);
}
.brand-name { font-size: 20px; font-weight: 800; color: #fff; letter-spacing: 1px; transition: color .3s; }
.site-header.scrolled .brand-name { color: var(--dark); }

.main-nav { display: flex; gap: 6px; }
.main-nav a {
  position: relative; padding: 8px 16px; font-size: 15.5px; font-weight: 500;
  color: rgba(255, 255, 255, .88); border-radius: 8px; transition: color .25s;
}
.main-nav a::after {
  content: ""; position: absolute; left: 50%; bottom: 0; width: 0; height: 2px;
  background: var(--cyan); border-radius: 2px; transition: all .25s; transform: translateX(-50%);
}
.main-nav a:hover, .main-nav a.active { color: #fff; }
.main-nav a:hover::after, .main-nav a.active::after { width: 22px; }
.site-header.scrolled .main-nav a { color: var(--text-light); }
.site-header.scrolled .main-nav a:hover,
.site-header.scrolled .main-nav a.active { color: var(--primary); }

.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.nav-toggle span { width: 24px; height: 2.5px; background: #fff; border-radius: 3px; transition: .3s; }
.site-header.scrolled .nav-toggle span { background: var(--dark); }

/* ---------------- Hero 轮播 ---------------- */
.hero { position: relative; height: 100vh; min-height: 600px; max-height: 900px; overflow: hidden; }
.hero-slides { position: absolute; inset: 0; }
.hero-slide {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center; text-align: center;
  opacity: 0; transform: scale(1.04); transition: opacity .9s ease, transform 1.2s ease;
  color: #fff; padding: 0 20px;
}
.hero-slide.active { opacity: 1; transform: scale(1); z-index: 2; }
.hero-slide.theme-blue { background: linear-gradient(135deg, #0b3fd1 0%, #0b5fff 45%, #0aa8e8 100%); }
.hero-slide.theme-dark { background: linear-gradient(135deg, #081130 0%, #10224d 55%, #1d3f8f 100%); }
.hero-slide.theme-cyan { background: linear-gradient(135deg, #075985 0%, #0e7fc4 50%, #0b5fff 100%); }
.hero-slide.has-image { background-size: cover; background-position: center; }
.hero-slide.has-image::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(120deg, rgba(8, 17, 48, .78), rgba(11, 63, 209, .45));
}
.hero-slide .slide-inner { position: relative; z-index: 2; max-width: 900px; }
.hero-slide .eyebrow {
  display: inline-block; padding: 6px 18px; border: 1px solid rgba(255,255,255,.35);
  border-radius: 999px; font-size: 13px; letter-spacing: 3px; margin-bottom: 26px;
  backdrop-filter: blur(4px);
}
.hero-slide h1 {
  font-size: clamp(32px, 5vw, 56px);
  line-height: 1.25; font-weight: 800; margin-bottom: 22px;
  text-shadow: 0 4px 24px rgba(0,0,0,.18);
}
.hero-slide p {
  font-size: clamp(15px, 2vw, 20px); color: rgba(255,255,255,.9);
  max-width: 720px; margin: 0 auto 38px;
}
.hero-slide .btn { padding: 14px 42px; font-size: 16px; }

/* 装饰光斑 */
.hero-slide .deco { position: absolute; border-radius: 50%; filter: blur(2px); opacity: .5; z-index: 1; }
.hero-slide .deco.d1 { width: 420px; height: 420px; background: radial-gradient(circle, rgba(22,197,255,.35), transparent 70%); top: -120px; right: -80px; }
.hero-slide .deco.d2 { width: 360px; height: 360px; background: radial-gradient(circle, rgba(255,255,255,.18), transparent 70%); bottom: -100px; left: -60px; }
.hero-slide .deco.d3 { width: 180px; height: 180px; border: 2px solid rgba(255,255,255,.18); border-radius: 50%; top: 18%; left: 10%; }

.hero-arrow {
  position: absolute; top: 50%; transform: translateY(-50%); z-index: 5;
  width: 48px; height: 48px; border-radius: 50%;
  border: 1px solid rgba(255,255,255,.35); color: #fff; font-size: 18px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,.08); backdrop-filter: blur(6px); transition: all .25s;
}
.hero-arrow:hover { background: rgba(255,255,255,.25); }
.hero-arrow.prev { left: 28px; }
.hero-arrow.next { right: 28px; }
.hero-dots { position: absolute; bottom: 120px; left: 50%; transform: translateX(-50%); z-index: 5; display: flex; gap: 10px; }
.hero-dots button {
  width: 26px; height: 5px; border-radius: 4px; background: rgba(255,255,255,.4); transition: all .3s;
}
.hero-dots button.active { width: 44px; background: #fff; }
.hero-wave { position: absolute; bottom: -1px; left: 0; right: 0; z-index: 4; line-height: 0; }
.hero-wave svg { width: 100%; height: 70px; display: block; }
.hero-wave path { fill: #fff; }

/* ---------------- 数据统计 ---------------- */
.stats-bar { background: #fff; position: relative; z-index: 6; margin-top: -2px; }
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
  padding: 46px 20px; margin-top: -46px; position: relative; z-index: 7;
  background: #fff; border-radius: 20px; box-shadow: var(--shadow);
}
.stat-item { text-align: center; border-right: 1px solid var(--border); }
.stat-item:last-child { border-right: none; }
.stat-item strong {
  display: block; font-size: clamp(28px, 3.4vw, 42px); font-weight: 800;
  background: linear-gradient(135deg, var(--primary), #0aa8e8);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.stat-item span { color: var(--text-light); font-size: 15px; }

/* ---------------- 通用板块 ---------------- */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 60px; }
.section-tag {
  display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: 3px;
  color: var(--primary); margin-bottom: 12px;
}
.section-title { font-size: clamp(26px, 3.2vw, 38px); font-weight: 800; color: var(--dark); }
.section-title::after {
  content: ""; display: block; width: 52px; height: 4px; border-radius: 3px;
  background: linear-gradient(90deg, var(--primary), var(--cyan));
  margin: 16px auto 0;
}
.section-sub { color: var(--text-light); margin-top: 18px; font-size: 16px; }
.section-head.light .section-title { color: #fff; }
.section-head.light .section-sub { color: rgba(255,255,255,.75); }
.section-head.light .section-tag { color: var(--cyan); }

/* ---------------- 关于我们 ---------------- */
.about-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 64px; align-items: center; }
.about-visual { position: relative; min-height: 380px; }
.about-card-main {
  background: linear-gradient(150deg, var(--dark) 0%, var(--dark-2) 70%, #17367e 100%);
  border-radius: 22px; padding: 54px 40px; color: #fff; min-height: 320px;
  display: flex; flex-direction: column; justify-content: center;
  box-shadow: var(--shadow-lg); position: relative; overflow: hidden;
}
.about-card-main::after {
  content: ""; position: absolute; width: 260px; height: 260px; border-radius: 50%;
  background: radial-gradient(circle, rgba(22,197,255,.28), transparent 70%);
  top: -90px; right: -70px;
}
.about-icon-ring {
  width: 76px; height: 76px; border-radius: 20px; margin-bottom: 24px;
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.2);
  display: flex; align-items: center; justify-content: center;
}
.about-icon-ring svg { width: 40px; height: 40px; stroke: var(--cyan); }
.about-card-main h3 { font-size: 24px; margin-bottom: 12px; }
.about-card-main p { color: rgba(255,255,255,.78); font-size: 15px; }
.about-card-float {
  position: absolute; background: #fff; border-radius: 16px; padding: 18px 24px;
  box-shadow: var(--shadow); display: flex; flex-direction: column; line-height: 1.3;
}
.about-card-float strong { font-size: 26px; color: var(--primary); font-weight: 800; }
.about-card-float span { font-size: 13px; color: var(--text-light); }
.about-card-float.f1 { top: -22px; right: -18px; }
.about-card-float.f2 { bottom: -22px; left: -18px; }

.about-brief { font-size: 17px; font-weight: 600; color: var(--dark); margin-bottom: 20px; line-height: 1.9; }
.about-detail { color: var(--text-light); margin-bottom: 30px; }
.about-detail p { margin-bottom: 14px; }
.about-text .btn { margin-top: 6px; }

/* ---------------- 服务卡片 ---------------- */
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.service-card {
  background: #fff; border-radius: var(--radius); padding: 38px 30px;
  border: 1px solid var(--border); transition: all .3s ease; 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(--cyan));
  transform: scaleX(0); transform-origin: left; transition: transform .35s ease;
}
.service-card:hover { transform: translateY(-8px); box-shadow: var(--shadow); border-color: transparent; }
.service-card:hover::before { transform: scaleX(1); }
.service-icon {
  width: 62px; height: 62px; border-radius: 16px; margin-bottom: 22px;
  background: linear-gradient(135deg, rgba(11,95,255,.1), rgba(22,197,255,.12));
  display: flex; align-items: center; justify-content: center;
  transition: all .3s;
}
.service-icon svg { width: 32px; height: 32px; stroke: var(--primary); }
.service-card:hover .service-icon { background: linear-gradient(135deg, var(--primary), var(--cyan)); }
.service-card:hover .service-icon svg { stroke: #fff; }
.service-card h3 { font-size: 20px; margin-bottom: 12px; color: var(--dark); }
.service-card > p { color: var(--text-light); font-size: 14.5px; margin-bottom: 18px; min-height: 72px; }
.service-features { display: flex; flex-wrap: wrap; gap: 8px; }
.service-features li {
  font-size: 12.5px; color: var(--primary); background: rgba(11,95,255,.07);
  padding: 4px 12px; border-radius: 999px;
}

/* ---------------- 优势 ---------------- */
.advantages {
  background: linear-gradient(150deg, var(--dark) 0%, var(--dark-2) 60%, #14306e 100%);
  position: relative; overflow: hidden;
}
.advantages::before {
  content: ""; position: absolute; width: 500px; height: 500px; border-radius: 50%;
  background: radial-gradient(circle, rgba(22,197,255,.14), transparent 70%);
  top: -160px; left: -120px;
}
.advantage-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
.advantage-item {
  background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius); padding: 38px 26px; text-align: center;
  transition: all .3s; backdrop-filter: blur(6px);
}
.advantage-item:hover { background: rgba(255,255,255,.1); transform: translateY(-6px); border-color: rgba(22,197,255,.4); }
.advantage-icon {
  width: 68px; height: 68px; margin: 0 auto 20px; border-radius: 50%;
  background: linear-gradient(135deg, rgba(11,95,255,.5), rgba(22,197,255,.35));
  display: flex; align-items: center; justify-content: center;
  border: 1px solid rgba(255,255,255,.18);
}
.advantage-icon svg { width: 34px; height: 34px; stroke: #fff; }
.advantage-item h3 { color: #fff; font-size: 19px; margin-bottom: 12px; }
.advantage-item p { color: rgba(255,255,255,.68); font-size: 14px; }

/* ---------------- 案例 ---------------- */
.filter-bar { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; margin-bottom: 42px; }
.filter-bar button {
  padding: 8px 24px; border-radius: 999px; font-size: 14.5px; color: var(--text-light);
  background: #fff; border: 1px solid var(--border); transition: all .25s;
}
.filter-bar button.active, .filter-bar button:hover {
  background: var(--primary); color: #fff; border-color: var(--primary);
  box-shadow: 0 6px 16px rgba(11,95,255,.3);
}
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.case-card {
  background: #fff; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border); cursor: pointer; transition: all .3s;
}
.case-card:hover { transform: translateY(-8px); box-shadow: var(--shadow); }
.case-cover {
  height: 190px; position: relative; overflow: hidden;
  background: linear-gradient(135deg, var(--dark), #17367e);
  display: flex; align-items: center; justify-content: center;
}
.case-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.case-card:hover .case-cover img { transform: scale(1.07); }
.case-cover .cover-fallback { text-align: center; color: rgba(255,255,255,.85); padding: 20px; }
.case-cover .cover-fallback svg { width: 46px; height: 46px; stroke: var(--cyan); margin-bottom: 8px; }
.case-cover .cover-fallback b { font-size: 15px; font-weight: 600; }
.case-cat {
  position: absolute; top: 14px; left: 14px; z-index: 2;
  background: rgba(11,95,255,.9); color: #fff; font-size: 12px;
  padding: 4px 12px; border-radius: 999px; backdrop-filter: blur(4px);
}
.case-body { padding: 22px 22px 24px; }
.case-body h3 { font-size: 17px; color: var(--dark); margin-bottom: 10px; line-height: 1.5; }
.case-body p { font-size: 14px; color: var(--text-light); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.case-more { margin-top: 14px; font-size: 13.5px; color: var(--primary); font-weight: 600; }

/* ---------------- 新闻 ---------------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.news-card {
  background: #fff; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border); transition: all .3s; cursor: pointer; display: flex; flex-direction: column;
}
.news-card:hover { transform: translateY(-8px); box-shadow: var(--shadow); }
.news-cover { height: 170px; overflow: hidden; background: linear-gradient(135deg, #0b5fff, #16c5ff); }
.news-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.news-card:hover .news-cover img { transform: scale(1.07); }
.news-date-box {
  float: left; width: 74px; text-align: center; background: var(--bg-alt);
  border-radius: 10px; margin: 20px 16px 8px 22px; padding: 10px 0;
}
.news-date-box strong { display: block; font-size: 24px; color: var(--primary); line-height: 1.2; }
.news-date-box span { font-size: 12px; color: var(--text-muted); }
.news-body { padding: 20px 22px 22px; overflow: hidden; flex: 1; display: flex; flex-direction: column; }
.news-cat { font-size: 12px; color: var(--cyan); font-weight: 700; }
.news-body h3 { font-size: 16.5px; color: var(--dark); margin: 8px 0 10px; line-height: 1.5;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-body p { font-size: 13.5px; color: var(--text-light);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ---------------- 合作伙伴 ---------------- */
.partner-wall { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.partner-item {
  background: #fff; border: 1px solid var(--border); border-radius: 12px;
  height: 86px; display: flex; align-items: center; justify-content: center;
  font-size: 17px; font-weight: 700; color: var(--text-light); letter-spacing: 1px;
  transition: all .3s;
}
.partner-item:hover { color: var(--primary); border-color: var(--primary); box-shadow: var(--shadow-sm); transform: translateY(-3px); }

/* ---------------- 联系我们 ---------------- */
.contact { background: linear-gradient(150deg, var(--dark) 0%, #0f2050 100%); color: #fff; position: relative; overflow: hidden; }
.contact::after {
  content: ""; position: absolute; width: 460px; height: 460px; border-radius: 50%;
  background: radial-gradient(circle, rgba(22,197,255,.12), transparent 70%);
  bottom: -180px; right: -100px;
}
.contact-grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: 56px; position: relative; z-index: 2; }
.contact-info h3 { font-size: 24px; margin-bottom: 28px; }
.contact-list li { display: flex; gap: 14px; align-items: flex-start; margin-bottom: 22px; color: rgba(255,255,255,.85); }
.contact-list .ci-icon {
  flex: none; width: 42px; height: 42px; border-radius: 11px;
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.14);
  display: flex; align-items: center; justify-content: center;
}
.contact-list .ci-icon svg { width: 20px; height: 20px; stroke: var(--cyan); }
.contact-list b { display: block; font-size: 13px; color: rgba(255,255,255,.55); font-weight: 400; }
.contact-qr { display: flex; align-items: center; gap: 16px; margin-top: 30px; }
.qr-box {
  width: 96px; height: 96px; border-radius: 12px; background: #fff;
  display: flex; align-items: center; justify-content: center; color: var(--primary);
  font-size: 12px; font-weight: 700; text-align: center; padding: 8px;
}
.contact-qr p { font-size: 13.5px; color: rgba(255,255,255,.7); }

.contact-form {
  background: #fff; border-radius: 20px; padding: 38px 36px; color: var(--text);
  box-shadow: var(--shadow-lg);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-item { margin-bottom: 18px; }
.form-item label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 8px; color: var(--dark); }
.form-item label em { color: #e34d4d; font-style: normal; }
.form-item input, .form-item textarea {
  width: 100%; padding: 12px 15px; border: 1.5px solid var(--border); border-radius: 10px;
  background: var(--bg-alt); transition: all .2s; resize: vertical;
}
.form-item input:focus, .form-item textarea:focus {
  outline: none; border-color: var(--primary); background: #fff;
  box-shadow: 0 0 0 3px rgba(11,95,255,.1);
}
.hp-field { position: absolute !important; left: -9999px !important; opacity: 0; height: 0; width: 0; }
.form-tip { text-align: center; margin-top: 12px; font-size: 14px; min-height: 22px; }
.form-tip.success { color: #18a058; }
.form-tip.error { color: #e34d4d; }

/* ---------------- 页脚 ---------------- */
.site-footer { background: #060e26; color: rgba(255,255,255,.65); padding-top: 64px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.3fr; gap: 40px; padding-bottom: 48px; }
.footer-brand { margin-bottom: 18px; }
.footer-about p { font-size: 14px; line-height: 1.9; }
.footer-col h4 { color: #fff; font-size: 16px; margin-bottom: 20px; }
.footer-col a, .footer-col p { display: block; font-size: 14px; margin-bottom: 12px; color: rgba(255,255,255,.6); transition: color .2s; }
.footer-col a:hover { color: var(--cyan); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 20px 0; font-size: 13px; }
.footer-bottom-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.footer-links { display: flex; gap: 16px; align-items: center; }
.footer-links a:hover { color: var(--cyan); }

/* ---------------- 回到顶部 ---------------- */
.back-top {
  position: fixed; right: 26px; bottom: 34px; z-index: 90;
  width: 46px; height: 46px; border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), #2f7bff); color: #fff;
  font-size: 20px; box-shadow: 0 8px 22px rgba(11,95,255,.4);
  opacity: 0; visibility: hidden; transform: translateY(12px); transition: all .3s;
}
.back-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { transform: translateY(-3px); }

/* ---------------- 弹窗 ---------------- */
.modal-mask {
  position: fixed; inset: 0; z-index: 200; background: rgba(6,14,38,.62);
  backdrop-filter: blur(4px); display: none; align-items: center; justify-content: center; padding: 30px 16px;
}
.modal-mask.show { display: flex; }
.modal-box {
  background: #fff; border-radius: 18px; max-width: 760px; width: 100%;
  max-height: 86vh; overflow-y: auto; position: relative;
  animation: modalIn .3s ease;
}
@keyframes modalIn { from { opacity: 0; transform: translateY(24px) scale(.98); } to { opacity: 1; transform: none; } }
.modal-close {
  position: sticky; top: 14px; float: right; margin: 14px 14px -46px 0; z-index: 3;
  width: 38px; height: 38px; border-radius: 50%; background: rgba(6,14,38,.55);
  color: #fff; font-size: 15px; display: flex; align-items: center; justify-content: center; transition: .2s;
}
.modal-close:hover { background: rgba(6,14,38,.85); transform: rotate(90deg); }
.modal-body { padding: 42px 46px 46px; }
.modal-hero { height: 240px; border-radius: 14px; margin-bottom: 26px; overflow: hidden;
  background: linear-gradient(135deg, var(--dark), #17367e); display:flex; align-items:center; justify-content:center; color: rgba(255,255,255,.9); }
.modal-hero img { width: 100%; height: 100%; object-fit: cover; }
.modal-meta { display: flex; gap: 14px; align-items: center; margin-bottom: 14px; flex-wrap: wrap; }
.modal-meta .tag { background: rgba(11,95,255,.1); color: var(--primary); font-size: 12.5px; padding: 4px 12px; border-radius: 999px; font-weight: 600; }
.modal-meta .date { color: var(--text-muted); font-size: 13.5px; }
.modal-body h2 { font-size: 24px; color: var(--dark); line-height: 1.5; margin-bottom: 8px; }
.modal-content { color: var(--text-light); margin-top: 18px; font-size: 15.5px; line-height: 2; }
.modal-content p { margin-bottom: 14px; white-space: pre-wrap; }

/* ---------------- 入场动画 ---------------- */
.reveal { opacity: 0; transform: translateY(34px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 992px) {
  .about-grid { grid-template-columns: 1fr; gap: 44px; }
  .about-visual { max-width: 480px; margin: 0 auto; width: 100%; }
  .service-grid, .case-grid, .news-grid { grid-template-columns: repeat(2, 1fr); }
  .advantage-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .partner-wall { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  .section { padding: 70px 0; }
  .main-nav {
    position: fixed; top: var(--header-h); left: 0; right: 0;
    background: #fff; flex-direction: column; gap: 0; padding: 10px 20px 20px;
    box-shadow: 0 16px 30px rgba(16,34,77,.12);
    transform: translateY(-130%); transition: transform .32s ease;
  }
  .main-nav.open { transform: translateY(0); }
  .main-nav a { color: var(--text) !important; padding: 14px 10px; border-bottom: 1px solid var(--border); border-radius: 0; }
  .main-nav a::after { display: none; }
  .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .nav-toggle.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
  .nav-toggle.open span:nth-child(2) { opacity: 0; }
  .nav-toggle.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 28px 10px; padding: 34px 18px; }
  .stat-item:nth-child(2) { border-right: none; }
  .hero-arrow { display: none; }
  .hero-dots { bottom: 96px; }
  .service-grid, .case-grid, .news-grid { grid-template-columns: 1fr; }
  .advantage-grid { grid-template-columns: 1fr; }
  .partner-wall { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .modal-body { padding: 34px 24px 36px; }
  .about-card-float.f1 { right: 0; }
  .about-card-float.f2 { left: 0; }
  .footer-bottom-inner { justify-content: center; text-align: center; }
}