/* ============================================================
   天津黑潮科技有限公司官网 · 前台样式
   设计语言：黑潮 · 深海科技蓝
   ============================================================ */

:root {
  --ink: #061B3F;            /* 深空蓝黑 */
  --navy: #0B3B8C;           /* 黑潮蓝（主色） */
  --azure: #1B6FE0;          /* 亮蓝 */
  --cyan: #19C3E6;           /* 潮青（强调） */
  --paper: #FFFFFF;
  --mist: #F3F7FC;           /* 浅蓝灰底 */
  --line: #E3EBF5;
  --text: #42536B;
  --muted: #7A8AA5;
  --grad: linear-gradient(135deg, #0B3B8C 0%, #1457B8 55%, #19C3E6 130%);
  --grad-deep: linear-gradient(160deg, #05142F 0%, #0B3B8C 90%);
  --shadow-sm: 0 2px 10px rgba(6, 27, 63, .06);
  --shadow-md: 0 10px 30px rgba(6, 27, 63, .10);
  --shadow-lg: 0 24px 60px rgba(6, 27, 63, .18);
  --radius: 14px;
  --nav-h: 72px;
  --topbar-h: 36px;
}

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

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + var(--topbar-h) + 8px); }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans SC", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--paper);
  font-size: 15px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

::selection { background: rgba(25, 195, 230, .25); }

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

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 12px; letter-spacing: .35em; color: var(--azure);
  font-weight: 600; text-transform: uppercase;
}
.eyebrow::before { content: ""; width: 26px; height: 2px; background: var(--grad); border-radius: 2px; }

.section { padding: 88px 0; }
.section.tinted { background: var(--mist); }

.section-head { text-align: center; max-width: 720px; margin: 0 auto 54px; }
.section-head h2 {
  font-size: 32px; color: var(--ink); font-weight: 700; letter-spacing: .02em; margin: 14px 0 12px;
}
.section-head p { color: var(--muted); font-size: 15px; }
.section-head .divider {
  width: 44px; height: 3px; margin: 18px auto 0; border-radius: 3px;
  background: var(--grad);
}

/* 滚动显现 */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .1s; } .reveal.d2 { transition-delay: .2s; }
.reveal.d3 { transition-delay: .3s; } .reveal.d4 { transition-delay: .4s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  *, *::before, *::after { animation-duration: .001s !important; animation-iteration-count: 1 !important; }
}

/* ---------- 顶部服务条 ---------- */
.topbar {
  height: var(--topbar-h); background: var(--ink); color: #B9C8E2;
  font-size: 12.5px; display: flex; align-items: center;
  position: relative; z-index: 1001;
}
.topbar .container { display: flex; align-items: center; justify-content: space-between; }
.topbar-left { display: flex; align-items: center; gap: 8px; }
.topbar-left svg { flex: none; }
.topbar-right { display: flex; align-items: center; gap: 20px; }
.topbar-right .hotline { display: inline-flex; align-items: center; gap: 7px; color: #fff; font-weight: 600; letter-spacing: .04em; }
.topbar-right .hotline svg { color: var(--cyan); }
.topbar a:hover { color: var(--cyan); }
.admin-link { display: inline-flex; align-items: center; gap: 5px; }

/* ---------- 主导航 ---------- */
.navbar {
  height: var(--nav-h); background: rgba(255,255,255,.94);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 1000;
  transition: box-shadow .3s ease;
}
.navbar.scrolled { box-shadow: var(--shadow-md); }
.navbar .container { height: 100%; display: flex; align-items: center; justify-content: space-between; }

.brand { display: flex; align-items: center; gap: 12px; }
.brand-logo { height: 40px; width: auto; display: block; }
.footer .brand-logo-ft { height: 38px; }
.brand-logo-mark { height: 46px; width: auto; display: block; }
.footer .brand-logo-mark-ft { height: 44px; }
.brand-mark {
  width: 42px; height: 42px; border-radius: 10px; flex: none;
  background: var(--grad); display: grid; place-items: center;
  box-shadow: 0 6px 14px rgba(11, 59, 140, .32);
}
.brand-mark svg { width: 24px; height: 24px; }
.brand-text .cn { font-size: 20px; font-weight: 800; color: var(--ink); letter-spacing: .06em; line-height: 1.2; }
.brand-text .en { font-size: 9.5px; color: var(--muted); letter-spacing: .12em; text-transform: uppercase; }

.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  padding: 8px 16px; font-size: 15.5px; color: var(--text); font-weight: 500;
  border-radius: 8px; position: relative; transition: color .25s;
}
.nav-links a::after {
  content: ""; position: absolute; left: 50%; bottom: 2px; width: 0; height: 3px;
  background: var(--grad); border-radius: 3px; transition: all .3s ease; transform: translateX(-50%);
}
.nav-links a:hover, .nav-links a.active { color: var(--navy); }
.nav-links a:hover::after, .nav-links a.active::after { width: 22px; }

.nav-toggle { display: none; width: 42px; height: 42px; border-radius: 8px; color: var(--ink); }
.nav-toggle svg { width: 24px; height: 24px; margin: auto; display: block; }

/* ---------- Hero 轮播 ---------- */
.hero { position: relative; color: #fff; overflow: hidden; background: var(--grad-deep); }
.hero-slide {
  position: relative; min-height: 640px; display: flex; align-items: center;
  opacity: 0; visibility: hidden; transition: opacity .9s ease, visibility .9s;
  position: absolute; inset: 0;
}
.hero-slide.active { opacity: 1; visibility: visible; position: relative; }
.hero-slide .bg {
  position: absolute; inset: 0; background-size: cover; background-position: center;
}
.hero-slide .bg::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(4,16,38,.92) 0%, rgba(6,27,63,.72) 45%, rgba(11,59,140,.42) 100%);
}
.hero-inner { position: relative; z-index: 2; width: min(1200px, 92%); margin: 0 auto; padding: 96px 0 120px; }
.hero-tag {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 7px 16px; border: 1px solid rgba(255,255,255,.28); border-radius: 999px;
  font-size: 13px; letter-spacing: .18em; color: #CFE6FF; background: rgba(255,255,255,.07);
  backdrop-filter: blur(6px);
}
.hero-tag i { width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 10px var(--cyan); }
.hero-title {
  font-size: 52px; font-weight: 800; line-height: 1.22; margin: 26px 0 8px; letter-spacing: .01em;
}
.hero-title .em {
  background: linear-gradient(90deg, #6FD8FF, #19C3E6);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-sub { font-size: 20px; color: #AFC6E8; font-weight: 400; letter-spacing: .06em; }
.hero-desc { max-width: 560px; margin-top: 18px; color: #9FB4D8; font-size: 15px; line-height: 1.9; }
.hero-actions { display: flex; gap: 16px; margin-top: 38px; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 13px 32px; border-radius: 10px; font-size: 15px; font-weight: 600;
  transition: transform .25s ease, box-shadow .25s ease, background .25s;
}
.btn svg { width: 17px; height: 17px; }
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 10px 24px rgba(11,59,140,.35); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 16px 32px rgba(11,59,140,.42); }
.btn-ghost { border: 1px solid rgba(255,255,255,.4); color: #fff; background: rgba(255,255,255,.06); backdrop-filter: blur(6px); }
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); transform: translateY(-3px); }
.btn-dark { background: var(--ink); color: #fff; }
.btn-dark:hover { background: var(--navy); }

/* hero 装饰：数字油田网络 */
.hero-deco {
  position: absolute; right: -60px; top: 50%; transform: translateY(-50%);
  width: 560px; height: 560px; opacity: .5; z-index: 1; pointer-events: none;
}
.hero-deco .ring { position: absolute; inset: 0; border-radius: 50%; border: 1px solid rgba(111,216,255,.25); }
.hero-deco .ring:nth-child(2) { inset: 60px; border-style: dashed; animation: spin 60s linear infinite; }
.hero-deco .ring:nth-child(3) { inset: 130px; border-color: rgba(25,195,230,.4); }
.hero-deco .node {
  position: absolute; width: 10px; height: 10px; border-radius: 50%;
  background: var(--cyan); box-shadow: 0 0 14px var(--cyan);
}
.hero-deco .node:nth-of-type(1) { top: 8%; left: 46%; animation: pulse 3.2s ease-in-out infinite; }
.hero-deco .node:nth-of-type(2) { top: 44%; left: 2%; animation: pulse 2.6s .4s ease-in-out infinite; }
.hero-deco .node:nth-of-type(3) { bottom: 16%; right: 18%; animation: pulse 3.8s .9s ease-in-out infinite; }
.hero-deco .node:nth-of-type(4) { top: 30%; right: 8%; width: 7px; height: 7px; animation: pulse 2.9s 1.2s ease-in-out infinite; }
.hero-deco svg { position: absolute; inset: 0; width: 100%; height: 100%; }

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes pulse { 0%,100% { opacity: .35; transform: scale(1); } 50% { opacity: 1; transform: scale(1.5); } }

/* 黑潮波纹（签名元素） */
.hero-waves { position: absolute; left: 0; right: 0; bottom: -2px; z-index: 3; pointer-events: none; }
.hero-waves svg { display: block; width: 200%; height: 90px; }
.hero-waves .w1 { animation: drift 16s linear infinite; opacity: .5; }
.hero-waves .w2 { animation: drift 11s linear infinite reverse; opacity: .35; }
.hero-waves .w3 { animation: drift 22s linear infinite; opacity: .9; }
@keyframes drift { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* 轮播指示器 */
.hero-dots {
  position: absolute; left: 50%; transform: translateX(-50%); bottom: 34px; z-index: 5;
  display: flex; gap: 10px;
}
.hero-dots button {
  width: 34px; height: 4px; border-radius: 4px; background: rgba(255,255,255,.32);
  transition: all .3s; cursor: pointer;
}
.hero-dots button.active { background: var(--cyan); width: 52px; box-shadow: 0 0 10px rgba(25,195,230,.7); }

/* ---------- 数字实力带 ---------- */
.stats-band { background: var(--ink); position: relative; overflow: hidden; }
.stats-band::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(600px 200px at 15% 0%, rgba(27,111,224,.22), transparent 70%),
    radial-gradient(500px 220px at 90% 100%, rgba(25,195,230,.14), transparent 70%);
}
.stats-grid {
  position: relative; display: grid; grid-template-columns: repeat(4, 1fr);
  padding: 44px 0;
}
.stat { text-align: center; padding: 8px 12px; position: relative; }
.stat + .stat::before {
  content: ""; position: absolute; left: 0; top: 50%; transform: translateY(-50%);
  height: 44px; width: 1px; background: linear-gradient(to bottom, transparent, rgba(255,255,255,.18), transparent);
}
.stat .num {
  font-size: 40px; font-weight: 800; color: #fff; letter-spacing: .02em;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  display: flex; align-items: baseline; justify-content: center; gap: 2px;
}
.stat .num .suffix { font-size: 22px; color: var(--cyan); font-weight: 700; }
.stat .label { margin-top: 6px; font-size: 13.5px; color: #8FA5CB; letter-spacing: .14em; }

/* ---------- 关于我们 ---------- */
.about-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 64px; align-items: center; }
.about-copy h2 { font-size: 30px; color: var(--ink); font-weight: 700; margin: 14px 0 18px; line-height: 1.35; }
.about-copy .lead { font-size: 16px; color: var(--navy); font-weight: 600; }
.about-copy p { margin-top: 14px; color: var(--text); }
.about-points { margin-top: 26px; display: grid; grid-template-columns: 1fr 1fr; gap: 12px 22px; }
.about-points li { display: flex; align-items: center; gap: 10px; font-size: 14.5px; color: var(--ink); font-weight: 500; }
.about-points .tick {
  width: 22px; height: 22px; flex: none; border-radius: 50%;
  background: rgba(25,195,230,.12); color: #0E9FC0; display: grid; place-items: center;
}
.about-points .tick svg { width: 12px; height: 12px; }
.about-cta { margin-top: 34px; }

.about-visual { position: relative; }
.about-visual .frame {
  position: relative; border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow-lg); aspect-ratio: 4 / 3;
}
.about-visual .frame img { width: 100%; height: 100%; object-fit: cover; }
.about-visual::before {
  content: ""; position: absolute; inset: 22px -22px -22px 22px;
  border-radius: var(--radius); border: 2px solid rgba(25,195,230,.35); z-index: -1;
}
.about-badge {
  position: absolute; left: -18px; bottom: 30px;
  background: rgba(255,255,255,.82); backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,.9); border-radius: 12px;
  padding: 14px 20px; box-shadow: var(--shadow-md); display: flex; gap: 12px; align-items: center;
}
.about-badge .ico { width: 40px; height: 40px; border-radius: 10px; background: var(--grad); display: grid; place-items: center; color: #fff; }
.about-badge .ico svg { width: 22px; height: 22px; }
.about-badge .t1 { font-size: 14px; font-weight: 700; color: var(--ink); line-height: 1.3; }
.about-badge .t2 { font-size: 12px; color: var(--muted); }

/* ---------- 解决方案 ---------- */
.sol-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.sol-card {
  display: block;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 32px 28px; position: relative; overflow: hidden;
  transition: transform .35s ease, box-shadow .35s ease, border-color .35s;
}
.sol-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--grad); transform: scaleX(0); transform-origin: left;
  transition: transform .4s ease;
}
.sol-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-md); border-color: rgba(27,111,224,.25); }
.sol-card:hover::before { transform: scaleX(1); }
.sol-ico {
  width: 56px; height: 56px; border-radius: 14px; display: grid; place-items: center;
  background: linear-gradient(135deg, rgba(11,59,140,.08), rgba(25,195,230,.12));
  color: var(--navy); margin-bottom: 20px; transition: all .35s;
}
.sol-ico svg { width: 28px; height: 28px; }
.sol-card:hover .sol-ico { background: var(--grad); color: #fff; box-shadow: 0 8px 18px rgba(11,59,140,.32); transform: rotate(-6deg) scale(1.05); }
.sol-card h3 { font-size: 19px; color: var(--ink); font-weight: 700; margin-bottom: 10px; }
.sol-card p { font-size: 14px; color: var(--muted); line-height: 1.85; }
.sol-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.sol-tags span {
  font-size: 12px; color: var(--navy); background: rgba(27,111,224,.08);
  border: 1px solid rgba(27,111,224,.14); padding: 3px 10px; border-radius: 999px;
}
.sol-more {
  display: inline-flex; align-items: center; gap: 6px; margin-top: 18px;
  font-size: 13.5px; font-weight: 600; color: var(--azure);
}
.sol-more svg { width: 15px; height: 15px; transition: transform .3s; }
.sol-card:hover .sol-more svg { transform: translateX(5px); }

/* ---------- 产品中心 ---------- */
.prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.prod-card {
  display: block;
  border-radius: var(--radius); overflow: hidden; background: #fff;
  border: 1px solid var(--line); transition: transform .35s ease, box-shadow .35s ease;
}
.prod-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.prod-cover { position: relative; aspect-ratio: 16 / 10; overflow: hidden; }
.prod-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.prod-card:hover .prod-cover img { transform: scale(1.07); }
.prod-cover .cat {
  position: absolute; left: 14px; top: 14px; z-index: 2;
  background: rgba(6,27,63,.72); backdrop-filter: blur(8px); color: #fff;
  font-size: 12px; padding: 4px 12px; border-radius: 999px; letter-spacing: .08em;
}
.prod-cover::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(6,27,63,.18), transparent 40%);
}
.prod-body { padding: 22px 24px 26px; }
.prod-body h3 { font-size: 18px; color: var(--ink); font-weight: 700; }
.prod-body p { font-size: 13.5px; color: var(--muted); margin-top: 8px; line-height: 1.8; }
.prod-more {
  display: inline-flex; align-items: center; gap: 6px; margin-top: 14px;
  font-size: 13.5px; font-weight: 600; color: var(--azure);
}
.prod-more svg { width: 15px; height: 15px; transition: transform .3s; }
.prod-card:hover .prod-more svg { transform: translateX(5px); }

/* ---------- 资质荣誉 ---------- */
.honor-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.honor-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 20px; text-align: center; transition: all .35s ease;
}
.honor-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: rgba(25,195,230,.4); }
.honor-card .medal {
  width: 58px; height: 58px; margin: 0 auto 16px; border-radius: 50%;
  background: radial-gradient(circle at 32% 28%, #2E86E8, #0B3B8C);
  display: grid; place-items: center; color: #fff;
  box-shadow: 0 8px 18px rgba(11,59,140,.3), inset 0 0 0 3px rgba(255,255,255,.22);
}
.honor-card .medal svg { width: 26px; height: 26px; }
.honor-card.has-img { padding: 12px; }
.honor-card.has-img .honor-photo {
  aspect-ratio: 4 / 3; border-radius: 10px; overflow: hidden; margin-bottom: 14px;
  border: 1px solid var(--line);
}
.honor-card.has-img .honor-photo img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.honor-card.has-img:hover .honor-photo img { transform: scale(1.06); }
.honor-card h3 { font-size: 16px; color: var(--ink); font-weight: 700; line-height: 1.45; }
.honor-card .year { display: inline-block; margin-top: 10px; font-size: 12.5px; color: var(--azure); background: rgba(27,111,224,.08); padding: 2px 12px; border-radius: 999px; }

.honor-strip {
  margin-top: 40px; background: #fff; border: 1px dashed rgba(27,111,224,.3);
  border-radius: var(--radius); padding: 22px 30px;
  display: flex; align-items: center; justify-content: center; gap: 14px 34px; flex-wrap: wrap;
}
.honor-strip .item { display: inline-flex; align-items: center; gap: 9px; color: var(--text); font-size: 14px; font-weight: 500; }
.honor-strip .item svg { width: 17px; height: 17px; color: var(--cyan); flex: none; }

/* ---------- 新闻中心 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; transition: all .35s ease; display: flex; flex-direction: column;
}
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.news-date {
  display: flex; align-items: baseline; gap: 5px; padding: 18px 24px 0;
  color: var(--navy); font-family: "Segoe UI", Arial, sans-serif;
}
.news-date .d { font-size: 34px; font-weight: 800; line-height: 1; }
.news-date .m { font-size: 12.5px; color: var(--muted); }
.news-body { padding: 12px 24px 24px; flex: 1; display: flex; flex-direction: column; }
.news-body h3 {
  font-size: 17px; color: var(--ink); font-weight: 700; line-height: 1.5;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.news-card:hover h3 { color: var(--azure); }
.news-body p {
  margin-top: 10px; font-size: 13.5px; color: var(--muted); line-height: 1.8;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; flex: 1;
}

/* ---------- 联系我们 ---------- */
.contact-section { background: var(--grad-deep); color: #fff; position: relative; overflow: hidden; }
.contact-section::before {
  content: ""; position: absolute; inset: 0; opacity: .5;
  background:
    radial-gradient(700px 300px at 85% 10%, rgba(25,195,230,.16), transparent 70%),
    radial-gradient(500px 260px at 5% 95%, rgba(27,111,224,.2), transparent 70%);
}
.contact-grid { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.contact-info h2 { font-size: 30px; font-weight: 700; }
.contact-info > p { margin-top: 14px; color: #9FB4D8; font-size: 15px; max-width: 460px; }
.contact-list { margin-top: 34px; display: grid; gap: 22px; }
.contact-item { display: flex; gap: 16px; }
.contact-item .ico {
  width: 46px; height: 46px; flex: none; border-radius: 12px;
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.16);
  display: grid; place-items: center; color: var(--cyan);
}
.contact-item .ico svg { width: 21px; height: 21px; }
.contact-item .k { font-size: 12.5px; color: #8FA5CB; letter-spacing: .16em; }
.contact-item .v { font-size: 15.5px; color: #EAF2FF; font-weight: 500; margin-top: 3px; }

.contact-form-card {
  background: rgba(255,255,255,.07); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
  border: 1px solid rgba(255,255,255,.14); border-radius: 18px;
  padding: 36px; box-shadow: var(--shadow-lg);
}
.contact-form-card h3 { font-size: 20px; font-weight: 700; }
.contact-form-card .hint { font-size: 13px; color: #8FA5CB; margin-top: 6px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 18px; }
.form-field { margin-top: 18px; }
.form-field label { display: block; font-size: 13px; color: #A9BEE0; margin-bottom: 7px; letter-spacing: .06em; }
.form-field input, .form-field textarea, .form-field select {
  width: 100%; padding: 12px 14px; border-radius: 10px; font-size: 14.5px;
  background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.18);
  color: #fff; outline: none; transition: border-color .25s, background .25s;
  font-family: inherit;
}
.form-field input::placeholder, .form-field textarea::placeholder { color: #6E86B0; }
.form-field input:focus, .form-field textarea:focus, .form-field select:focus {
  border-color: var(--cyan); background: rgba(255,255,255,.1);
}
.form-field textarea { min-height: 104px; resize: vertical; }
.form-submit { margin-top: 24px; width: 100%; padding: 14px; font-size: 15.5px; }
.form-note { text-align: center; margin-top: 14px; font-size: 12.5px; color: #7E96BE; }

/* ---------- 页脚 ---------- */
.footer { background: #04122B; color: #8FA5CB; font-size: 13.5px; }
.footer-main { padding: 64px 0 48px; display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.3fr; gap: 44px; }
/* 产品/方案详情页的页脚只有 3 栏。必须用类而不是内联 style，
   否则会盖掉上面 1080px / 560px 的媒体查询，手机上仍挤成 3 列。 */
.footer-main.footer-main--3 { grid-template-columns: 1.7fr 1fr 1.25fr; }
.footer h4 { color: #fff; font-size: 15.5px; font-weight: 700; margin-bottom: 20px; letter-spacing: .05em; }
.footer-brand .brand-text .cn { color: #fff; }
.footer-brand .brand-text .en { color: #5C7296; }
.footer-brand p { margin-top: 18px; line-height: 1.9; }
.footer-links li { margin-bottom: 11px; }
.footer-links a { transition: color .25s, padding-left .25s; }
.footer-links a:hover { color: var(--cyan); padding-left: 4px; }
.footer-contact li { display: flex; gap: 10px; margin-bottom: 14px; line-height: 1.7; }
.footer-contact svg { width: 16px; height: 16px; color: var(--cyan); flex: none; margin-top: 4px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08); padding: 20px 0;
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 12.5px; color: #5C7296;
}

/* ---------- 返回顶部 ---------- */
.backtop {
  position: fixed; right: 26px; bottom: 30px; z-index: 900;
  width: 46px; height: 46px; border-radius: 12px;
  background: var(--grad); color: #fff; display: grid; place-items: center;
  box-shadow: var(--shadow-md); opacity: 0; visibility: hidden; transform: translateY(14px);
  transition: all .35s ease;
}
.backtop.show { opacity: 1; visibility: visible; transform: none; }
.backtop:hover { transform: translateY(-4px); }
.backtop svg { width: 20px; height: 20px; }

/* ---------- Toast ---------- */
.toast {
  position: fixed; left: 50%; bottom: 44px; transform: translate(-50%, 20px);
  background: rgba(6,27,63,.92); color: #fff; padding: 13px 26px; border-radius: 10px;
  font-size: 14px; z-index: 1200; opacity: 0; visibility: hidden;
  transition: all .35s ease; box-shadow: var(--shadow-lg); display: flex; gap: 9px; align-items: center;
}
.toast.show { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.toast svg { width: 17px; height: 17px; color: var(--cyan); }

/* ---------- 页脚·旗下站点 ---------- */
.ft-links { border-top: 1px solid rgba(255,255,255,.07); }
.ft-links .container { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; padding: 20px 0 4px; }
.ft-links .cap { display: inline-flex; align-items: center; gap: 8px; color: #6FD8FF; font-size: 13px; letter-spacing: .14em; flex: none; }
.ft-links .cap svg { width: 15px; height: 15px; }
.ft-links .items { display: flex; gap: 10px; flex-wrap: wrap; }
.ft-links .items a {
  font-size: 13px; color: #8FA5CB; padding: 5px 15px; border: 1px solid rgba(255,255,255,.12);
  border-radius: 999px; transition: all .25s; display: inline-flex; gap: 6px; align-items: center;
}
.ft-links .items a:hover { color: #6FD8FF; border-color: rgba(111,216,255,.45); transform: translateY(-2px); }
.ft-links .items a svg { width: 12px; height: 12px; }

/* ---------- 产品详情页 ---------- */
.pd-crumb { background: #fff; border-bottom: 1px solid var(--line); font-size: 13.5px; color: var(--muted); }
.pd-crumb .container { display: flex; align-items: center; gap: 10px; padding: 14px 0; flex-wrap: wrap; }
.pd-crumb a { color: var(--muted); transition: color .2s; }
.pd-crumb a:hover { color: var(--azure); }
.pd-crumb .sep { opacity: .45; }
.pd-crumb .cur { color: var(--ink); font-weight: 600; }

.pd-hero { background: var(--mist); padding: 64px 0 76px; }
.pd-hero-grid { display: grid; grid-template-columns: 1fr 1.05fr; gap: 60px; align-items: center; }
.pd-cat {
  display: inline-block; padding: 5px 15px; border-radius: 999px;
  background: rgba(27,111,224,.1); color: var(--azure); font-size: 13px; letter-spacing: .08em; margin-bottom: 16px;
}
.pd-title { font-size: 38px; color: var(--ink); font-weight: 800; line-height: 1.3; margin-bottom: 14px; letter-spacing: .01em; }
.pd-desc { color: var(--text); font-size: 15.5px; line-height: 1.95; }
.pd-actions { display: flex; gap: 14px; margin-top: 34px; flex-wrap: wrap; }
.btn-outline-dark { border: 1px solid rgba(6,27,63,.22); color: var(--navy); background: #fff; }
.btn-outline-dark:hover { border-color: var(--azure); color: var(--azure); transform: translateY(-3px); }
.pd-visual { position: relative; }
.pd-visual img {
  position: relative; z-index: 1; width: 100%; border-radius: var(--radius);
  box-shadow: var(--shadow-lg); aspect-ratio: 16 / 10; object-fit: cover; background: #fff;
}
.pd-visual::before {
  content: ""; position: absolute; inset: 20px -20px -20px 20px;
  border-radius: var(--radius); border: 2px solid rgba(25,195,230,.35);
}

.pd-feats { padding: 84px 0; }
.pd-feat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.pd-feat {
  display: flex; gap: 14px; align-items: flex-start; background: #fff;
  border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 24px; transition: all .3s;
}
.pd-feat:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: rgba(25,195,230,.4); }
.pd-feat .tick {
  width: 34px; height: 34px; flex: none; border-radius: 10px;
  background: linear-gradient(135deg, rgba(11,59,140,.08), rgba(25,195,230,.14));
  color: var(--navy); display: grid; place-items: center;
}
.pd-feat .tick svg { width: 17px; height: 17px; }
.pd-feat .tx { font-size: 15px; color: var(--ink); font-weight: 500; line-height: 1.75; padding-top: 4px; }

.pd-others { background: var(--mist); padding: 84px 0; }

.pd-cta { background: var(--grad-deep); color: #fff; padding: 78px 0; text-align: center; position: relative; overflow: hidden; }
.pd-cta::before {
  content: ""; position: absolute; inset: 0; opacity: .5;
  background:
    radial-gradient(700px 300px at 85% 10%, rgba(25,195,230,.16), transparent 70%),
    radial-gradient(500px 260px at 5% 95%, rgba(27,111,224,.2), transparent 70%);
}
.pd-cta .container { position: relative; }
.pd-cta h2 { font-size: 30px; }
.pd-cta p { color: #9FB4D8; margin-top: 12px; }
.pd-cta .tel { font-size: 20px; font-weight: 700; color: #6FD8FF; letter-spacing: .04em; }
.pd-cta-actions { margin-top: 32px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

@media (max-width: 860px) {
  .pd-hero { padding: 44px 0 56px; }
  .pd-hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .pd-visual { order: -1; }
  .pd-visual::before { display: none; }
  .pd-title { font-size: 28px; }
  .pd-feat-grid { grid-template-columns: 1fr; }
  .pd-feats, .pd-others { padding: 60px 0; }
  .pd-cta h2 { font-size: 24px; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .hero-deco { width: 420px; height: 420px; right: -120px; opacity: .32; }
  .hero-title { font-size: 42px; }
  .footer-main { grid-template-columns: 1fr 1fr; }
  .footer-main.footer-main--3 { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 860px) {
  :root { --nav-h: 62px; }
  .topbar .topbar-left span { display: none; }
  .nav-toggle { display: block; }
  .nav-links {
    position: fixed; top: calc(var(--nav-h) + var(--topbar-h)); left: 0; right: 0;
    background: #fff; flex-direction: column; align-items: stretch; gap: 0;
    padding: 10px 5% 20px; border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-md); transform: translateY(-12px); opacity: 0; visibility: hidden;
    transition: all .3s ease; max-height: calc(100vh - 120px); overflow-y: auto;
  }
  .nav-links.open { transform: none; opacity: 1; visibility: visible; }
  .nav-links a { padding: 13px 10px; border-radius: 8px; font-size: 16px; }
  .nav-links a::after { display: none; }
  .hero-slide { min-height: 540px; }
  .hero-inner { padding: 72px 0 110px; }
  .hero-title { font-size: 33px; }
  .hero-sub { font-size: 16.5px; }
  .hero-deco { display: none; }
  .section { padding: 64px 0; }
  .section-head h2 { font-size: 26px; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .sol-grid, .prod-grid, .news-grid { grid-template-columns: 1fr 1fr; }
  .honor-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 18px 0; }
  .stat:nth-child(3)::before { display: none; }
  .form-row { grid-template-columns: 1fr; }
  .about-visual::before { display: none; }
}

@media (max-width: 560px) {
  .sol-grid, .prod-grid, .news-grid, .honor-grid { grid-template-columns: 1fr; }
  .hero-title { font-size: 27px; }
  .hero-actions .btn { flex: 1; }
  .about-points { grid-template-columns: 1fr; }
  .footer-main { grid-template-columns: 1fr; gap: 32px; }
  .footer-main.footer-main--3 { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { justify-content: center; text-align: center; }
  .contact-form-card { padding: 26px 20px; }
  .topbar-right .hotline .lbl { display: none; }
}