/* ===== 四川毕达兴科技有限公司官网 ===== */
:root {
  --primary: #0b5bd3;
  --primary-dark: #084298;
  --primary-light: #e8f1fd;
  --accent: #00b4d8;
  --ink: #17233d;
  --ink-2: #45526b;
  --ink-3: #7a869e;
  --line: #e6ebf3;
  --bg: #f6f8fc;
  --white: #ffffff;
  --dark: #0c1b33;
  --radius: 14px;
  --shadow: 0 8px 30px rgba(11, 91, 211, 0.08);
  --shadow-lg: 0 16px 48px rgba(12, 27, 51, 0.14);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ---------- 顶部导航 ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .3s;
}
.nav.scrolled { box-shadow: 0 4px 20px rgba(12,27,51,.08); }
.nav-inner { display: flex; align-items: center; height: 68px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; white-space: nowrap; flex-shrink: 0; }
.logo-mark {
  width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-size: 15px; font-weight: 800; letter-spacing: 1px;
}
.logo small { display: block; font-size: 11px; font-weight: 400; color: var(--ink-3); letter-spacing: 1px; }
.nav-links { margin-left: auto; display: flex; gap: 4px; }
.nav-links a {
  padding: 8px 10px; border-radius: 8px; font-size: 14px; color: var(--ink-2);
  transition: .2s; white-space: nowrap;
}
.nav-links a:hover, .nav-links a.active { color: var(--primary); background: var(--primary-light); }
.nav-cta {
  margin-left: 6px; padding: 9px 16px; border-radius: 999px; white-space: nowrap;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff !important; font-size: 14px; font-weight: 600;
}
.nav-toggle { display: none; margin-left: auto; background: none; border: none; font-size: 26px; cursor: pointer; color: var(--ink); }

/* ---------- 产品中心下拉菜单 ---------- */
.nav-dropdown { position: relative; display: flex; align-items: center; height: 100%; }
.nav-dropdown .has-menu { display: inline-flex; align-items: center; }
.nav-dropdown .has-menu .caret { font-size: 11px; margin-left: 4px; }
.nav-menu {
  position: absolute; top: calc(100% + 10px); left: 50%; transform: translateX(-50%) translateY(8px);
  min-width: 300px; background: #fff; border: 1px solid var(--line); border-radius: 14px;
  box-shadow: var(--shadow-lg); padding: 10px; z-index: 120;
  opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity .2s, transform .2s, visibility .2s;
}
.nav-dropdown:hover .nav-menu,
.nav-dropdown:focus-within .nav-menu,
.nav-menu.open {
  opacity: 1; visibility: visible; pointer-events: auto; transform: translateX(-50%) translateY(0);
}
.nav-menu::before {
  content: ""; position: absolute; top: -6px; left: 50%; margin-left: -6px;
  width: 12px; height: 12px; background: #fff; border-left: 1px solid var(--line);
  border-top: 1px solid var(--line); transform: rotate(45deg);
}
.nav-menu a {
  display: flex; align-items: center; gap: 12px; padding: 10px 12px;
  border-radius: 10px; transition: background .15s;
}
.nav-menu a:hover { background: var(--primary-light); }
.nav-menu .nm-ico {
  width: 38px; height: 38px; border-radius: 10px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-style: normal; color: #fff;
}
.nav-menu a span { font-size: 14px; font-weight: 600; color: var(--ink); line-height: 1.35; }
.nav-menu a small { display: block; font-size: 11.5px; font-weight: 400; color: var(--ink-3); }
.nav-menu .nm-all {
  justify-content: center; border-top: 1px dashed var(--line); margin-top: 6px;
  padding-top: 12px;
}
.nav-menu .nm-all span { color: var(--primary); font-size: 13px; }

/* ---------- Hero ---------- */
.hero {
  padding: 170px 0 90px;
  background:
    radial-gradient(900px 420px at 85% -10%, rgba(0,180,216,.16), transparent 60%),
    radial-gradient(800px 500px at 8% 10%, rgba(11,91,211,.14), transparent 60%),
    linear-gradient(180deg, #f4f8ff 0%, #ffffff 100%);
  position: relative; overflow: hidden;
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(11,91,211,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11,91,211,.05) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,.7), transparent 80%);
  pointer-events: none;
}
.hero-inner { position: relative; z-index: 1; text-align: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 18px; border-radius: 999px; font-size: 13px; font-weight: 600;
  color: var(--primary); background: #fff; border: 1px solid #cfe0fb;
  box-shadow: var(--shadow); margin-bottom: 26px;
}
.hero-badge i { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }
.hero h1 { font-size: 52px; line-height: 1.25; letter-spacing: 2px; margin-bottom: 18px; }
.hero h1 span {
  background: linear-gradient(120deg, var(--primary), var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { font-size: 19px; color: var(--ink-2); max-width: 760px; margin: 0 auto 40px; }
.hero-actions { display: flex; gap: 16px; justify-content: center; margin-bottom: 64px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 34px; border-radius: 999px; font-size: 16px; font-weight: 600;
  transition: transform .2s, box-shadow .2s; cursor: pointer; border: none;
}
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--accent)); color: #fff; box-shadow: 0 10px 26px rgba(11,91,211,.32); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 34px rgba(11,91,211,.4); }
.btn-ghost { background: #fff; color: var(--primary); border: 1px solid #c4d8f8; }
.btn-ghost:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.hero-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; max-width: 900px; margin: 0 auto; }
.hero-stat {
  background: rgba(255,255,255,.85); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px 10px; box-shadow: var(--shadow);
}
.hero-stat b { display: block; font-size: 34px; color: var(--primary); line-height: 1.2; }
.hero-stat b sup { font-size: 16px; }
.hero-stat span { font-size: 13px; color: var(--ink-3); }

/* ---------- 通用区块 ---------- */
.section { padding: 96px 0; }
.section.alt { background: var(--bg); }
.sec-head { text-align: center; margin-bottom: 56px; }
.sec-tag {
  display: inline-block; padding: 4px 16px; border-radius: 999px; font-size: 13px;
  font-weight: 600; color: var(--primary); background: var(--primary-light); margin-bottom: 14px;
}
.sec-head h2 { font-size: 36px; letter-spacing: 1px; margin-bottom: 12px; }
.sec-head p { color: var(--ink-2); font-size: 17px; max-width: 720px; margin: 0 auto; }

/* ---------- 关于我们 ---------- */
.about-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items: center; }
.about-text h3 { font-size: 26px; margin-bottom: 18px; }
.about-text p { color: var(--ink-2); margin-bottom: 14px; font-size: 16px; }
.about-points { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 26px; }
.about-point {
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  padding: 16px 18px; font-size: 14px; box-shadow: var(--shadow);
}
.about-point b { display: block; color: var(--primary); font-size: 15px; margin-bottom: 4px; }
.about-visual {
  border-radius: 18px; overflow: hidden; box-shadow: var(--shadow-lg);
  border: 1px solid var(--line);
}

/* ---------- 产品线卡片 ---------- */
.product-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.p-card {
  background: #fff; border: 1px solid var(--line); border-radius: 18px;
  padding: 34px 30px; box-shadow: var(--shadow); position: relative;
  transition: transform .25s, box-shadow .25s; display: flex; flex-direction: column;
}
.p-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.p-card .p-icon {
  width: 56px; height: 56px; border-radius: 14px; display: flex; align-items: center;
  justify-content: center; font-size: 26px; margin-bottom: 20px;
}
.p-card:nth-child(1) .p-icon { background: linear-gradient(135deg,#0b5bd3,#00b4d8); }
.p-card:nth-child(2) .p-icon { background: linear-gradient(135deg,#0e9f6e,#34d399); }
.p-card:nth-child(3) .p-icon { background: linear-gradient(135deg,#7c3aed,#a78bfa); }
.p-card:nth-child(4) .p-icon { background: linear-gradient(135deg,#d97706,#fbbf24); }
.p-card h3 { font-size: 21px; margin-bottom: 6px; }
.p-card .p-sub { font-size: 13px; color: var(--ink-3); margin-bottom: 16px; }
.p-card p { font-size: 14.5px; color: var(--ink-2); margin-bottom: 18px; flex: 1; }
.p-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.p-tags span {
  font-size: 12px; padding: 3px 12px; border-radius: 999px;
  background: var(--bg); color: var(--ink-2); border: 1px solid var(--line);
}
.p-link { font-size: 14px; font-weight: 600; color: var(--primary); }
.p-link:hover { text-decoration: underline; }

/* ---------- 产品详情 ---------- */
.pd { border-radius: 22px; overflow: hidden; border: 1px solid var(--line); background: #fff; box-shadow: var(--shadow); margin-bottom: 40px; }
.pd-banner { padding: 44px 48px; color: #fff; position: relative; }
.pd-banner.hg { background: linear-gradient(120deg, #0b3d91, #0b5bd3 55%, #00b4d8); }
.pd-banner.sp { background: linear-gradient(120deg, #065f46, #0e9f6e 55%, #34d399); }
.pd-banner.tz { background: linear-gradient(120deg, #4c1d95, #7c3aed 55%, #a78bfa); }
.pd-banner.ph { background: linear-gradient(120deg, #92400e, #d97706 55%, #fbbf24); }
.pd-banner.hj { background: linear-gradient(120deg, #155e75, #0891b2 55%, #22d3ee); }
.pd-banner .pd-kicker { font-size: 13px; letter-spacing: 3px; opacity: .85; margin-bottom: 8px; }
.pd-banner h3 { font-size: 30px; margin-bottom: 10px; }
.pd-banner p { max-width: 760px; font-size: 15.5px; opacity: .94; }
.pd-banner .pd-nums { display: flex; gap: 36px; margin-top: 24px; flex-wrap: wrap; }
.pd-banner .pd-nums div b { font-size: 26px; display: block; }
.pd-banner .pd-nums div span { font-size: 12.5px; opacity: .85; }
.pd-body { padding: 40px 48px 48px; }
.pd-body h4 {
  font-size: 18px; margin: 30px 0 18px; padding-left: 14px; position: relative;
}
.pd-body h4::before {
  content: ""; position: absolute; left: 0; top: 4px; bottom: 4px; width: 4px;
  border-radius: 4px; background: linear-gradient(180deg, var(--primary), var(--accent));
}
.pd-body h4:first-child { margin-top: 0; }
.module-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.module-item {
  background: var(--bg); border: 1px solid var(--line); border-radius: 12px;
  padding: 16px; font-size: 14px; transition: .2s;
}
.module-item:hover { border-color: #b9d2f7; background: #fff; box-shadow: var(--shadow); }
.module-item b { display: block; margin-bottom: 4px; font-size: 14.5px; }
.module-item span { color: var(--ink-3); font-size: 12.5px; line-height: 1.5; display: block; }
.feat-list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 28px; }
.feat-list li {
  list-style: none; font-size: 14.5px; color: var(--ink-2); padding-left: 26px; position: relative;
}
.feat-list li::before {
  content: "✓"; position: absolute; left: 0; top: 0; color: #0e9f6e; font-weight: 700;
}
.shot-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.shot {
  border-radius: 12px; overflow: hidden; border: 1px solid var(--line);
  background: #fff; box-shadow: var(--shadow); cursor: zoom-in; transition: transform .25s;
}
.shot:hover { transform: scale(1.015); }
.shot figcaption {
  padding: 10px 16px; font-size: 13px; color: var(--ink-2);
  border-top: 1px solid var(--line); background: #fafbfe;
}
.flow-steps { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.flow-steps .fs {
  background: var(--primary-light); color: var(--primary-dark); font-size: 13.5px;
  font-weight: 600; padding: 8px 16px; border-radius: 999px; border: 1px solid #cfe0fb;
}
.flow-steps .fa { color: var(--ink-3); font-size: 13px; }

/* ---------- 合规体系 ---------- */
.comp-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.comp-card {
  background: #fff; border: 1px solid var(--line); border-radius: 16px;
  padding: 28px; box-shadow: var(--shadow);
}
.comp-card .comp-code {
  font-size: 13px; font-weight: 700; color: var(--primary);
  background: var(--primary-light); padding: 3px 12px; border-radius: 6px; display: inline-block;
  margin-bottom: 12px;
}
.comp-card h3 { font-size: 17px; margin-bottom: 8px; }
.comp-card p { font-size: 13.5px; color: var(--ink-2); }

/* ---------- 技术架构 ---------- */
.arch-wrap {
  background: var(--dark); border-radius: 22px; padding: 48px; color: #dbe6f7;
  display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: center;
}
.arch-wrap h3 { color: #fff; font-size: 24px; margin-bottom: 14px; }
.arch-wrap p { font-size: 14.5px; color: #a9bad4; margin-bottom: 10px; }
.arch-layers { display: flex; flex-direction: column; gap: 10px; }
.arch-layer {
  border: 1px solid rgba(255,255,255,.14); border-radius: 12px; padding: 14px 18px;
  background: rgba(255,255,255,.05); display: flex; align-items: center; gap: 14px;
}
.arch-layer b { color: #7fd1ff; font-size: 13px; min-width: 76px; }
.arch-layer span { font-size: 13.5px; }
.arch-badges { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.arch-badges span {
  font-size: 12.5px; padding: 5px 14px; border-radius: 999px;
  background: rgba(127,209,255,.12); color: #7fd1ff; border: 1px solid rgba(127,209,255,.25);
}

/* ---------- 核心优势 ---------- */
.adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.adv-card {
  background: #fff; border-radius: 16px; padding: 30px 26px; border: 1px solid var(--line);
  box-shadow: var(--shadow); transition: transform .25s;
}
.adv-card:hover { transform: translateY(-5px); }
.adv-card .adv-num {
  font-size: 30px; font-weight: 800; color: transparent;
  background: linear-gradient(120deg, var(--primary), var(--accent));
  -webkit-background-clip: text; background-clip: text; margin-bottom: 10px;
}
.adv-card h3 { font-size: 17px; margin-bottom: 8px; }
.adv-card p { font-size: 13.5px; color: var(--ink-2); }

/* ---------- 联系我们 ---------- */
.contact-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.contact-info h3 { font-size: 24px; margin-bottom: 16px; }
.contact-info p { color: var(--ink-2); margin-bottom: 12px; }
.contact-cards { display: flex; flex-direction: column; gap: 14px; margin-top: 24px; }
.contact-card {
  display: flex; gap: 16px; align-items: center; background: #fff;
  border: 1px solid var(--line); border-radius: 14px; padding: 18px 22px; box-shadow: var(--shadow);
}
.contact-card .cc-icon {
  width: 46px; height: 46px; border-radius: 12px; flex-shrink: 0;
  background: var(--primary-light); display: flex; align-items: center; justify-content: center; font-size: 20px;
}
.contact-card b { display: block; font-size: 15px; }
.contact-card span { font-size: 13px; color: var(--ink-3); }
.contact-form {
  background: #fff; border: 1px solid var(--line); border-radius: 18px;
  padding: 34px; box-shadow: var(--shadow);
}
.contact-form h3 { font-size: 20px; margin-bottom: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; color: var(--ink-2); margin-bottom: 6px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 11px 14px; border: 1px solid var(--line); border-radius: 10px;
  font-size: 14px; font-family: inherit; background: var(--bg); transition: border-color .2s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--primary); background: #fff;
}
.form-group textarea { resize: vertical; min-height: 96px; }
.form-submit { width: 100%; justify-content: center; }
.form-tip { font-size: 12.5px; color: var(--ink-3); margin-top: 12px; text-align: center; }

/* ---------- 页脚 ---------- */
.footer { background: var(--dark); color: #93a5c4; padding: 56px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 36px; margin-bottom: 40px; }
.footer h4 { color: #fff; font-size: 15px; margin-bottom: 16px; }
.footer a, .footer li { display: block; list-style: none; font-size: 13.5px; margin-bottom: 10px; color: #93a5c4; }
.footer a:hover { color: #fff; }
.footer-brand p { font-size: 13px; margin-top: 12px; max-width: 320px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1); padding-top: 22px;
  display: flex; justify-content: space-between; font-size: 12.5px;
  flex-wrap: wrap; gap: 8px;
}
.footer-bottom .beian a {
  display: inline; margin: 0; font-size: 12.5px; color: #93a5c4;
}
.footer-bottom .beian a:hover { color: #fff; }

/* ---------- 图片灯箱 ---------- */
.lightbox {
  position: fixed; inset: 0; z-index: 200; background: rgba(8,15,30,.9);
  display: none; align-items: center; justify-content: center; padding: 40px; cursor: zoom-out;
}
.lightbox.open { display: flex; }
.lightbox img { max-width: 92%; max-height: 90%; border-radius: 10px; box-shadow: 0 30px 80px rgba(0,0,0,.5); }

/* ---------- 售前咨询浮窗 ---------- */
.float-consult { position: fixed; top: 50%; transform: translateY(-50%); z-index: 140; }
.fc-left { left: 26px; }
.fc-right { right: 26px; }
.fc-toggle {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px;
  width: 66px; height: 66px; border-radius: 50%; border: none; cursor: pointer;
  background: linear-gradient(135deg, var(--primary), var(--accent)); color: #fff;
  box-shadow: 0 10px 28px rgba(11,91,211,.4); transition: transform .25s;
  font-family: inherit;
}
.fc-toggle:hover { transform: scale(1.07); }
.fc-ico { font-size: 20px; line-height: 1; }
.fc-txt { font-size: 12px; font-weight: 600; line-height: 1.25; text-align: center; }
.fc-panel {
  position: absolute; bottom: 0; width: 230px;
  background: #fff; border: 1px solid var(--line); border-radius: 16px;
  box-shadow: var(--shadow-lg); padding: 22px 20px 18px; text-align: center;
  opacity: 0; pointer-events: none;
  transition: opacity .25s, transform .25s;
}
.fc-right .fc-panel { right: 78px; transform: translateX(12px) scale(.96); }
.fc-left .fc-panel { left: 78px; transform: translateX(-12px) scale(.96); }
.fc-panel.open { opacity: 1; transform: none; pointer-events: auto; }
.fc-close {
  position: absolute; top: 8px; right: 10px; width: 26px; height: 26px;
  border: none; border-radius: 50%; background: var(--bg); color: var(--ink-3);
  font-size: 16px; cursor: pointer; line-height: 1;
}
.fc-close:hover { background: var(--primary-light); color: var(--primary); }
.fc-head { font-size: 16px; font-weight: 700; margin-bottom: 14px; }
.fc-qr {
  width: 160px; height: 160px; margin: 0 auto 10px; border-radius: 10px;
  border: 1px solid var(--line);
}
.fc-tip { font-size: 12.5px; color: var(--ink-3); margin-bottom: 12px; }
.fc-phone {
  display: block; font-size: 17px; font-weight: 700; color: var(--primary);
  padding: 10px; border-radius: 10px; background: var(--primary-light); margin-bottom: 10px;
  transition: .2s;
}
.fc-phone:hover { background: #d6e6fc; }
.fc-msg { display: block; font-size: 13.5px; color: var(--ink-2); }
.fc-msg:hover { color: var(--primary); }

/* ---------- FAQ ---------- */
.faq-list { max-width: 860px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item {
  background: #fff; border: 1px solid var(--line); border-radius: 14px;
  box-shadow: var(--shadow); overflow: hidden;
}
.faq-item summary {
  cursor: pointer; padding: 18px 24px; font-size: 15.5px; font-weight: 600;
  list-style: none; position: relative; padding-right: 52px; transition: color .2s;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+"; position: absolute; right: 22px; top: 50%; transform: translateY(-50%);
  font-size: 20px; color: var(--primary); transition: transform .25s;
}
.faq-item[open] summary { color: var(--primary); }
.faq-item[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq-item p {
  padding: 0 24px 20px; font-size: 14px; color: var(--ink-2);
  border-top: 1px dashed var(--line); padding-top: 14px; margin: 0 0;
}

/* ---------- 返回顶部 ---------- */
.to-top {
  position: fixed; right: 28px; bottom: 28px; z-index: 90; width: 46px; height: 46px;
  border-radius: 50%; border: none; background: var(--primary); color: #fff; font-size: 18px;
  cursor: pointer; box-shadow: var(--shadow-lg); opacity: 0; pointer-events: none; transition: .3s;
}
.to-top.show { opacity: 1; pointer-events: auto; }

/* ---------- 动效 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .module-grid { grid-template-columns: repeat(3, 1fr); }
  .comp-grid, .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .product-cards { grid-template-columns: 1fr; }
  .arch-wrap { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
}
@media (max-width: 1400px) {
  .logo small { display: none; } /* 隐藏英文副标，避免导航挤压换行 */
}
@media (max-width: 1220px) {
  .nav-links { display: none; position: absolute; top: 68px; left: 0; right: 0;
    background: #fff; flex-direction: column; padding: 12px; border-bottom: 1px solid var(--line); }
  .nav-links.open { display: flex; }
  .nav-links a { white-space: normal; }
  .nav-dropdown { display: block; height: auto; }
  .nav-dropdown .has-menu { display: block; }
  .nav-menu {
    position: static; transform: none; opacity: 1; visibility: visible;
    pointer-events: auto; box-shadow: none; border: none; border-left: 2px solid var(--line);
    border-radius: 0; padding: 4px 0 4px 14px; margin: 0 16px 8px; min-width: 0;
  }
  .nav-menu::before { display: none; }
  .nav-menu a { padding: 8px 10px; }
  .nav-toggle { display: block; }
  .nav-cta { display: none; }
  .hero { padding: 130px 0 60px; }
  .hero h1 { font-size: 32px; }
  .hero-sub { font-size: 16px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 64px 0; }
  .sec-head h2 { font-size: 27px; }
  .pd-banner, .pd-body { padding: 28px 22px; }
  .module-grid { grid-template-columns: repeat(2, 1fr); }
  .feat-list, .shot-grid, .contact-wrap, .form-row { grid-template-columns: 1fr; }
  .comp-grid, .adv-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; gap: 6px; }
  .fc-left { left: 12px; }
  .fc-right { right: 12px; }
  .fc-toggle { width: 58px; height: 58px; }
  .fc-panel { bottom: 70px; width: 210px; }
  .fc-right .fc-panel { right: 0; }
  .fc-left .fc-panel { left: 0; }
}

/* ================= 资讯中心 ================= */
.news-hero { padding: 150px 0 56px; background: linear-gradient(120deg, #0b3d91, #0b5bd3 60%, #00b4d8); color: #fff; text-align: center; }
.news-hero h1 { font-size: 34px; margin-bottom: 12px; }
.news-hero p { opacity: .92; font-size: 16px; }
.news-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.news-card { display: block; background: #fff; border: 1px solid #e8eef7; border-radius: 14px; padding: 28px 30px; transition: all .25s; }
.news-card:hover { transform: translateY(-4px); box-shadow: 0 14px 34px rgba(11, 61, 145, .12); border-color: #bcd3f5; }
.news-card .nc-tag { display: inline-block; font-size: 12.5px; color: #0b5bd3; background: #eaf2fe; border-radius: 20px; padding: 4px 12px; margin-bottom: 12px; }
.news-card h3 { font-size: 19px; line-height: 1.5; margin-bottom: 10px; color: #17233d; }
.news-card p { font-size: 14px; color: #5b6b84; line-height: 1.75; margin-bottom: 14px; }
.news-card .nc-meta { font-size: 12.5px; color: #93a1b8; display: flex; justify-content: space-between; }
.news-card .nc-meta b { color: #0b5bd3; font-weight: 600; }

/* 文章页 */
.article-hero { padding: 150px 0 48px; background: linear-gradient(120deg, #0b3d91, #0b5bd3 60%, #00b4d8); color: #fff; }
.article-hero .crumb { font-size: 13.5px; opacity: .85; margin-bottom: 14px; }
.article-hero .crumb a { color: #fff; text-decoration: underline; }
.article-hero h1 { font-size: 30px; line-height: 1.5; max-width: 900px; }
.article-hero .a-meta { margin-top: 16px; font-size: 13.5px; opacity: .88; }
.article-body { max-width: 860px; margin: 0 auto; padding: 48px 20px 64px; }
.article-body .a-lead { font-size: 16.5px; line-height: 1.9; color: #2c3a52; background: #f4f8fe; border-left: 4px solid #0b5bd3; border-radius: 0 10px 10px 0; padding: 18px 22px; margin-bottom: 30px; }
.article-body h2 { font-size: 22px; color: #17233d; margin: 38px 0 16px; padding-left: 12px; border-left: 4px solid #0b5bd3; }
.article-body h3 { font-size: 17.5px; color: #17233d; margin: 26px 0 12px; }
.article-body p { font-size: 15.5px; line-height: 1.95; color: #3a4a63; margin-bottom: 14px; }
.article-body ul, .article-body ol { margin: 0 0 16px 22px; }
.article-body li { font-size: 15.5px; line-height: 1.9; color: #3a4a63; margin-bottom: 8px; }
.article-body table { width: 100%; border-collapse: collapse; margin: 18px 0 24px; font-size: 14px; }
.article-body th, .article-body td { border: 1px solid #dfe7f3; padding: 10px 12px; text-align: left; line-height: 1.7; }
.article-body th { background: #f0f5fc; color: #17233d; }
.article-body .a-key { background: #fff8ec; border: 1px solid #f5dfa8; border-radius: 10px; padding: 16px 20px; margin: 20px 0; font-size: 14.5px; line-height: 1.85; color: #6b5410; }
.article-cta { margin-top: 46px; background: linear-gradient(120deg, #0b3d91, #0b5bd3 60%, #00b4d8); border-radius: 14px; padding: 30px 34px; color: #fff; display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.article-cta h3 { font-size: 19px; margin-bottom: 6px; color: #fff; }
.article-cta p { font-size: 14px; opacity: .92; margin: 0; color: #fff; }
.article-cta .btn { background: #fff; color: #0b5bd3; }
.article-related { max-width: 860px; margin: 0 auto; padding: 0 20px 70px; }
.article-related h4 { font-size: 17px; color: #17233d; margin-bottom: 14px; }
.article-related a { display: block; padding: 12px 16px; border: 1px solid #e8eef7; border-radius: 10px; margin-bottom: 10px; font-size: 14.5px; color: #2c3a52; transition: all .2s; }
.article-related a:hover { border-color: #0b5bd3; color: #0b5bd3; }
@media (max-width: 900px) {
  .news-grid { grid-template-columns: 1fr; }
  .news-hero { padding: 120px 0 44px; }
  .article-hero { padding: 120px 0 36px; }
  .article-hero h1 { font-size: 23px; }
}


/* ================= AI 创新板块 ================= */
.nav-ai {
  background: linear-gradient(135deg, #7c3aed, #00b4d8);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 700;
}

/* 产品卡片 AI 能力条 */
.p-ai {
  margin: 12px 0 4px; padding: 8px 12px; border-radius: 10px;
  background: linear-gradient(135deg, rgba(124,58,237,.08), rgba(0,180,216,.08));
  border: 1px dashed rgba(124,58,237,.35);
  font-size: 12.5px; color: var(--ink-2); line-height: 1.5;
}
.p-ai b { color: #7c3aed; margin-right: 6px; font-size: 12px; }

/* AI 主板块：深色主题 */
.ai-section {
  background:
    radial-gradient(900px 420px at 90% 0%, rgba(124,58,237,.22), transparent 60%),
    radial-gradient(800px 500px at 5% 100%, rgba(0,180,216,.16), transparent 60%),
    linear-gradient(180deg, #0c1b33 0%, #12244a 100%);
  color: #e8eefb;
}
.ai-section .sec-head h2 { color: #fff; }
.ai-section .sec-head p { color: #9fb3d9; }
.ai-section .sec-tag {
  background: linear-gradient(135deg, #7c3aed, #00b4d8);
  color: #fff; border: none;
}
.ai-sub { color: #fff; font-size: 20px; margin: 48px 0 20px; text-align: left; }

/* 三层架构 */
.ai-layers { display: flex; flex-direction: column; gap: 14px; margin-bottom: 44px; }
.ai-layer {
  display: flex; gap: 18px; align-items: flex-start;
  background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius); padding: 20px 24px;
}
.ai-layer-no {
  flex-shrink: 0; width: 44px; height: 44px; border-radius: 12px;
  background: linear-gradient(135deg, #7c3aed, #00b4d8);
  color: #fff; font-weight: 800; display: flex; align-items: center; justify-content: center;
}
.ai-layer h3 { color: #fff; font-size: 17px; margin-bottom: 6px; }
.ai-layer p { color: #b9c8e6; font-size: 14px; }

/* 对话演示布局 */
.ai-demo-wrap {
  display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; align-items: center;
  margin-bottom: 8px;
}
.ai-demo-text h3 { color: #fff; font-size: 24px; margin-bottom: 12px; }
.ai-demo-text > p { color: #b9c8e6; font-size: 15px; }
.ai-demo-points { list-style: none; margin-top: 18px; display: flex; flex-direction: column; gap: 12px; }
.ai-demo-points li { color: #cdd9f0; font-size: 14px; padding-left: 18px; position: relative; }
.ai-demo-points li::before { content: ""; position: absolute; left: 0; top: 10px; width: 7px; height: 7px; border-radius: 50%; background: linear-gradient(135deg, #7c3aed, #00b4d8); }
.ai-demo-points b { color: #fff; margin-right: 6px; }

/* 聊天窗 */
.chat-window {
  background: #fff; border-radius: 18px; overflow: hidden;
  box-shadow: 0 24px 60px rgba(3, 10, 26, .45);
  color: var(--ink);
}
.chat-window.sm { box-shadow: var(--shadow-lg); border: 1px solid var(--line); }
.chat-head {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 18px; color: #fff;
  background: linear-gradient(135deg, #1d2b53, #0b5bd3);
}
.chat-window.sm .chat-head { background: linear-gradient(135deg, #1d2b53, #0b5bd3); }
.chat-avatar {
  width: 40px; height: 40px; border-radius: 50%; background: rgba(255,255,255,.16);
  display: flex; align-items: center; justify-content: center; font-size: 20px; flex-shrink: 0;
}
.chat-title b { display: block; font-size: 15px; }
.chat-title span { font-size: 12px; color: #bcd3ff; }
.chat-live {
  margin-left: auto; font-size: 10.5px; letter-spacing: 1.5px; font-weight: 700;
  padding: 4px 10px; border-radius: 999px;
  background: linear-gradient(135deg, #7c3aed, #00b4d8); color: #fff;
}
.chat-body {
  padding: 18px; display: flex; flex-direction: column; gap: 14px;
  background: #f4f7fd; min-height: 120px;
}
.chat-window .chat-body { max-height: 480px; overflow-y: auto; }

/* 消息气泡（动画由 JS 驱动：容器加 .anim 后逐条显示） */
.msg { display: flex; }
.chat-window.anim .msg { opacity: 0; transform: translateY(10px); transition: opacity .35s, transform .35s; }
.chat-window.anim .msg.shown { opacity: 1; transform: none; }
.msg.user { justify-content: flex-end; }
.msg-bubble {
  max-width: 88%; padding: 11px 14px; border-radius: 14px;
  font-size: 14px; line-height: 1.65;
}
.msg.user .msg-bubble {
  background: linear-gradient(135deg, var(--primary), #2f7ef0);
  color: #fff; border-bottom-right-radius: 4px;
}
.msg.ai .msg-bubble {
  background: #fff; border: 1px solid var(--line);
  border-bottom-left-radius: 4px; box-shadow: 0 2px 10px rgba(12,27,51,.05);
}
.msg-bubble b { font-weight: 700; }

/* 打字中指示 */
.msg.typing .msg-bubble { display: inline-flex; gap: 5px; padding: 14px 16px; }
.msg.typing .msg-bubble i {
  width: 7px; height: 7px; border-radius: 50%; background: #b8c4d8;
  animation: chat-blink 1s infinite;
}
.msg.typing .msg-bubble i:nth-child(2) { animation-delay: .18s; }
.msg.typing .msg-bubble i:nth-child(3) { animation-delay: .36s; }
@keyframes chat-blink { 0%, 60%, 100% { opacity: .3; } 30% { opacity: 1; } }

/* 结构化数据卡片 */
.chat-card {
  margin-top: 10px; background: #f6f9ff; border: 1px solid var(--line);
  border-radius: 10px; padding: 10px 12px; display: flex; flex-direction: column; gap: 8px;
}
.chat-card.cite { background: #fffbf2; border-color: #f0e2bd; color: var(--ink-2); font-size: 13px; }
.chat-card.cite b { display: block; margin-bottom: 2px; }
.cc-row { display: flex; align-items: center; gap: 8px; font-size: 13px; flex-wrap: wrap; }
.cc-row em { font-style: normal; color: var(--ink-3); font-size: 12.5px; }
.cc-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.cc-dot.red { background: #e5484d; } .cc-dot.amber { background: #f5a524; } .cc-dot.green { background: #18a058; }
.cc-bar { flex: 1; min-width: 60px; height: 8px; border-radius: 999px; background: #e3eaf6; overflow: hidden; }
.cc-bar i { display: block; height: 100%; border-radius: 999px; background: linear-gradient(90deg, var(--primary), var(--accent)); }

/* 判定卡片 */
.chat-card.verdict { border-left: 3px solid var(--primary); }
.chat-card.verdict.ok { border-left-color: #18a058; }
.cc-verdict { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; font-size: 14px; }
.cc-badge {
  font-size: 12px; padding: 3px 10px; border-radius: 999px;
  background: var(--primary-light); color: var(--primary); font-weight: 600;
}
.cc-badge.ok { background: #e7f7ee; color: #0f7a3d; }

/* 操作按钮 */
.chat-actions { margin-top: 10px; display: flex; gap: 8px; flex-wrap: wrap; }
.chat-btn {
  font-size: 12.5px; padding: 6px 14px; border-radius: 999px; cursor: default;
  background: linear-gradient(135deg, var(--primary), var(--accent)); color: #fff; font-weight: 600;
}
.chat-btn.ghost { background: #fff; color: var(--primary); border: 1px solid rgba(11,91,211,.4); }

/* 输入条 */
.chat-input {
  display: flex; align-items: center; gap: 10px; padding: 12px 14px;
  border-top: 1px solid var(--line); background: #fff;
}
.chat-input span {
  flex: 1; font-size: 13px; color: var(--ink-3);
  background: #f4f7fd; border-radius: 999px; padding: 8px 16px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.chat-input button {
  border: none; border-radius: 999px; padding: 8px 18px; font-size: 13px; font-weight: 600;
  background: linear-gradient(135deg, var(--primary), var(--accent)); color: #fff; cursor: pointer;
}

/* 通用能力网格 */
.skill-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px;
}
.skill-card {
  background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.12);
  border-radius: 12px; padding: 16px;
}
.skill-card b { display: block; color: #fff; font-size: 14.5px; margin-bottom: 6px; }
.skill-card span { color: #a9bcd9; font-size: 12.5px; line-height: 1.6; }

/* 专家矩阵 */
.expert-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.expert-card {
  background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.12);
  border-radius: 12px; padding: 14px;
}
.expert-head { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.expert-avatar {
  width: 36px; height: 36px; border-radius: 10px; flex-shrink: 0;
  background: linear-gradient(135deg, #7c3aed, #00b4d8);
  display: flex; align-items: center; justify-content: center; font-size: 17px;
}
.expert-head b { display: block; color: #fff; font-size: 13.5px; }
.expert-head small { color: #8fa6cc; font-size: 11px; }
.expert-card p { color: #a9bcd9; font-size: 12.5px; line-height: 1.6; }

/* 合规护栏 */
.ai-guard {
  margin-top: 48px; border-radius: 16px; padding: 28px;
  background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.14);
}
.ai-guard h3 { color: #fff; font-size: 20px; margin-bottom: 18px; }
.ai-guard-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.ai-guard-grid b { display: block; color: #fff; font-size: 14.5px; margin-bottom: 6px; }
.ai-guard-grid span { color: #a9bcd9; font-size: 12.5px; line-height: 1.6; }

/* 架构图层 · AI 层高亮 */
.arch-layer.ai {
  border: 1px solid rgba(124,58,237,.5);
  background: linear-gradient(135deg, rgba(124,58,237,.1), rgba(0,180,216,.08));
}

/* 响应式 */
@media (max-width: 1024px) {
  .skill-grid { grid-template-columns: repeat(2, 1fr); }
  .expert-grid { grid-template-columns: repeat(3, 1fr); }
  .ai-guard-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-demo-wrap { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 640px) {
  .skill-grid, .expert-grid, .ai-guard-grid { grid-template-columns: 1fr; }
  .msg-bubble { max-width: 96%; }
}


/* 售前咨询浮窗 · 人员头像（无二维码时使用） */
.fc-avatar {
  width: 72px; height: 72px; border-radius: 50%; margin: 8px auto 4px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff; font-size: 30px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 6px 18px rgba(11,91,211,.25);
}


/* ============================================================
   独立落地页（产品页 / 服务页 / 关于页）
   由 tools/gen_pages.js 生成的页面使用
   ============================================================ */

/* ---------- 页面头图 ---------- */
.pd-hero { padding: 140px 0 64px; color: #fff; }
.pd-hero.hg    { background: linear-gradient(120deg, #0b3d91, #0b5bd3 55%, #00b4d8); }
.pd-hero.sp    { background: linear-gradient(120deg, #065f46, #0e9f6e 55%, #34d399); }
.pd-hero.tz    { background: linear-gradient(120deg, #4c1d95, #7c3aed 55%, #a78bfa); }
.pd-hero.ph    { background: linear-gradient(120deg, #92400e, #d97706 55%, #fbbf24); }
.pd-hero.hj    { background: linear-gradient(120deg, #155e75, #0891b2 55%, #22d3ee); }
.pd-hero.sv    { background: linear-gradient(120deg, #0f2744, #155e9e 55%, #1d9e75); }
.pd-hero.about { background: linear-gradient(120deg, #0b3d91, #0b5bd3 60%, #00b4d8); }

.crumb-bar { font-size: 13.5px; opacity: .88; margin-bottom: 18px; }
.crumb-bar a { color: #fff; text-decoration: underline; }
.crumb-bar span { opacity: .82; }

.pd-hero-kicker { font-size: 13px; letter-spacing: 3px; opacity: .85; margin-bottom: 10px; }
.pd-hero h1 { font-size: 34px; line-height: 1.4; margin-bottom: 16px; max-width: 940px; }
.pd-hero-lead { font-size: 16px; line-height: 1.85; max-width: 900px; opacity: .95; }
.pd-hero .pd-nums { display: flex; gap: 40px; margin-top: 28px; flex-wrap: wrap; }
.pd-hero .pd-nums div b { font-size: 28px; display: block; }
.pd-hero .pd-nums div span { font-size: 12.5px; opacity: .85; }
.pd-hero-actions { display: flex; gap: 14px; margin-top: 30px; flex-wrap: wrap; }

.btn-white { background: #fff; color: #0b5bd3; }
.btn-white:hover { transform: translateY(-2px); box-shadow: 0 14px 34px rgba(0, 0, 0, .18); }
.btn-line { background: rgba(255, 255, 255, .12); color: #fff; border: 1px solid rgba(255, 255, 255, .5); }
.btn-line:hover { background: rgba(255, 255, 255, .2); }

/* ---------- 适用对象 / 优势卡片 ---------- */
.sector-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.sector-card {
  background: #fff; border: 1px solid var(--line); border-radius: 14px;
  padding: 20px 22px; box-shadow: var(--shadow); transition: .2s;
}
.sector-card:hover { border-color: #b9d2f7; transform: translateY(-3px); }
.sector-card b { display: block; font-size: 15.5px; margin-bottom: 7px; color: var(--ink); }
.sector-card span { font-size: 13.5px; color: var(--ink-3); line-height: 1.7; display: block; }

/* ---------- 相关产品 / 相关服务卡片 ---------- */
.rel-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.rel-card {
  display: block; background: #fff; border: 1px solid var(--line); border-radius: 14px;
  padding: 22px 24px; box-shadow: var(--shadow); transition: .22s;
}
.rel-card:hover {
  border-color: #0b5bd3; transform: translateY(-4px);
  box-shadow: 0 14px 34px rgba(11, 91, 211, .12);
}
.rel-card .rc-tag {
  display: inline-block; font-size: 12px; color: #0b5bd3; background: #eaf2fe;
  border-radius: 20px; padding: 3px 11px; margin-bottom: 10px;
}
.rel-card b { display: block; font-size: 16px; color: #17233d; line-height: 1.5; margin-bottom: 8px; }
.rel-card .rc-desc { display: block; font-size: 13.5px; color: #5b6b84; line-height: 1.7; margin-bottom: 12px; }
.rel-card .rc-more { font-size: 13.5px; color: #0b5bd3; font-weight: 600; }

/* ---------- 交付物清单（双列） ---------- */
.feat-list-single { grid-template-columns: 1fr 1fr; }

/* ---------- 首页产品区块末尾的「查看完整方案」入口 ---------- */
.pd-more {
  margin-top: 34px; padding-top: 26px;
  border-top: 1px dashed var(--line); text-align: center;
}
.pd-more .btn { display: inline-block; }

/* ---------- 关于页正文 ---------- */
.about-copy { max-width: 900px; margin: 0 auto; }
.about-copy p { font-size: 16px; line-height: 2; color: #3a4a63; margin-bottom: 18px; }

/* ---------- 产品页内区块标题（由首页 h4 提升为 h3 后保持同款样式） ---------- */
.pd-body h3.pd-h3 { font-size: 18px; margin: 30px 0 18px; padding-left: 14px; position: relative; }
.pd-body h3.pd-h3::before {
  content: ""; position: absolute; left: 0; top: 4px; bottom: 4px; width: 4px;
  border-radius: 4px; background: linear-gradient(180deg, var(--primary), var(--accent));
}
.pd-body h3.pd-h3:first-child { margin-top: 0; }

/* ---------- 落地页内 CTA 不需要额外上间距 ---------- */
.section .article-cta { margin-top: 0; }

/* ---------- 落地页响应式 ---------- */
@media (max-width: 1024px) {
  .sector-grid, .rel-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 1220px) {
  .pd-hero { padding: 110px 0 48px; }
  .pd-hero h1 { font-size: 26px; }
  .pd-hero-lead { font-size: 15px; }
}
@media (max-width: 640px) {
  .sector-grid, .rel-grid, .feat-list-single { grid-template-columns: 1fr; }
  .pd-hero .pd-nums { gap: 22px; }
}