/* =========================================================
   武汉奇码智联网络科技有限公司 官网首页
   配色取自 Logo：深蓝 #002B5B / 科技青绿 #00A8A8
   ========================================================= */

:root {
  --navy: #002B5B;
  --navy-2: #013a73;
  --teal: #00A8A8;
  --teal-dark: #008f8f;
  --light-blue: #E6F2F8;
  --white: #FFFFFF;
  --gray-bg: #F7F9FA;
  --text: #333333;
  --text-2: #666666;
  --text-muted: #999999;
  --border: #E5E9ED;
  --radius: 14px;
  --shadow-sm: 0 2px 10px rgba(0, 43, 91, 0.06);
  --shadow-md: 0 10px 30px rgba(0, 43, 91, 0.10);
  --maxw: 1200px;
  --nav-h: 72px;
  --font-cn: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --font-en: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); }

body {
  font-family: var(--font-cn);
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  font-family: var(--font-cn);
  cursor: pointer;
  border: 1.5px solid transparent;
  transition: all .25s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--teal);
  color: #fff;
  box-shadow: 0 6px 18px rgba(0, 168, 168, 0.30);
}
.btn-primary:hover { background: var(--teal-dark); transform: translateY(-2px); box-shadow: 0 10px 24px rgba(0, 168, 168, 0.38); }
.btn-outline {
  background: transparent;
  color: var(--navy);
  border-color: var(--navy);
}
.btn-outline:hover { background: var(--navy); color: #fff; transform: translateY(-2px); }

/* ---------- 导航栏 ---------- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 100;
  background: rgba(255, 255, 255, 0.0);
  transition: background .3s ease, box-shadow .3s ease;
}
.navbar.scrolled {
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 2px 16px rgba(0, 43, 91, 0.08);
  backdrop-filter: saturate(180%) blur(8px);
}
.nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-logo { height: 48px; width: auto; }
.navbar:not(.scrolled) .brand-logo { filter: brightness(0) invert(1); }

.nav-menu { display: flex; align-items: center; gap: 30px; }
.nav-link {
  font-size: 15px;
  font-weight: 700;
  color: var(--navy);
  position: relative;
  padding: 4px 0;
  transition: color .2s ease;
}
.navbar:not(.scrolled) .nav-link { color: rgba(255,255,255,.92); }
.nav-link::after {
  content: ""; position: absolute; left: 0; bottom: -2px;
  width: 0; height: 2px; background: var(--teal); transition: width .25s ease;
}
.nav-link:hover { color: var(--teal); }
.nav-link:hover::after { width: 100%; }
.navbar:not(.scrolled) .nav-link:hover { color: #fff; }
.navbar:not(.scrolled) .nav-cta { background: #fff; color: var(--navy); box-shadow: none; }
.navbar:not(.scrolled) .nav-cta:hover { background: var(--teal); color: #fff; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none; border: none; cursor: pointer; padding: 6px;
}
.nav-toggle span { width: 24px; height: 2px; background: var(--navy); border-radius: 2px; transition: .3s; }
.navbar:not(.scrolled) .nav-toggle span { background: #fff; }

/* ---------- 区块通用 ---------- */
.section { padding: 96px 0; }
.section-light { background: var(--white); }
.section-gray { background: var(--gray-bg); }
.section-navy { background: linear-gradient(160deg, var(--navy) 0%, var(--navy-2) 100%); color: #fff; }

.section-head { text-align: center; max-width: 680px; margin: 0 auto 56px; }
.section-head.light .section-title,
.section-head.light .section-desc { color: #fff; }
.section-tag {
  display: inline-block;
  font-size: 13px; font-weight: 600; letter-spacing: 2px;
  color: var(--teal); text-transform: uppercase; margin-bottom: 14px;
}
.section-head.light .section-tag { color: #5fd4d4; }
.section-title { font-size: 32px; font-weight: 700; color: var(--navy); line-height: 1.3; }
.section-desc { margin-top: 14px; color: var(--text-2); font-size: 16px; }

/* ---------- 网格 ---------- */
.grid { display: grid; gap: 26px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }
.card-icon, .case-icon {
  width: 56px; height: 56px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  background: var(--light-blue); color: var(--teal); margin-bottom: 20px;
}
.card-icon svg, .case-icon svg, .adv-icon svg { width: 28px; height: 28px; }
.card-title { font-size: 19px; font-weight: 700; color: var(--navy); margin-bottom: 10px; }
.card-text { color: var(--text-2); font-size: 15px; }

/* ---------- 案例卡 ---------- */
.case-card { position: relative; padding-top: 30px; }
.case-tag {
  position: absolute; top: 22px; right: 24px;
  font-size: 12px; font-weight: 600; color: var(--teal-dark);
  background: var(--light-blue); padding: 4px 12px; border-radius: 999px;
}
.case-icon { background: var(--light-blue); color: var(--navy); }
.case-title { font-size: 20px; font-weight: 700; color: var(--navy); margin-bottom: 8px; }
.case-metric { font-size: 15px; color: var(--text); margin-bottom: 12px; }
.case-metric strong { color: var(--teal-dark); }

/* ---------- 核心优势 ---------- */
.adv-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: transform .25s ease, box-shadow .25s ease;
}
.adv-item:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.adv-icon {
  width: 52px; height: 52px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--navy), var(--navy-2));
  color: #fff; margin-bottom: 18px;
}
.adv-title { font-size: 18px; font-weight: 700; color: var(--navy); margin-bottom: 8px; }
.adv-text { color: var(--text-2); font-size: 15px; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: calc(var(--nav-h) + 80px) 0 90px;
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(0,168,168,.18), transparent 60%),
    linear-gradient(160deg, var(--navy) 0%, var(--navy-2) 55%, #024a8f 100%);
  color: #fff;
  overflow: hidden;
}
.hero-inner { display: grid; grid-template-columns: 1.15fr .85fr; gap: 40px; align-items: center; }
.hero-eyebrow { font-size: 15px; letter-spacing: 1px; color: #8fd4d4; font-weight: 600; margin-bottom: 16px; }
.hero-title { font-size: 48px; font-weight: 800; line-height: 1.2; letter-spacing: 1px; }
.hero-slogan-en { font-family: var(--font-en); font-size: 15px; letter-spacing: 2px; color: #b9e3e3; margin-top: 10px; text-transform: uppercase; }
.hero-sub { margin-top: 20px; font-size: 17px; color: rgba(255,255,255,.88); max-width: 560px; }
.hero-quote {
  margin-top: 22px; padding-left: 16px; border-left: 3px solid var(--teal);
  color: #cfe9e9; font-size: 15px; font-style: italic;
}
.hero-actions { margin-top: 32px; display: flex; gap: 16px; flex-wrap: wrap; }
.hero-actions .btn-outline {
  color: rgba(255,255,255,.95);
  border-color: rgba(255,255,255,.7);
}
.hero-actions .btn-outline:hover {
  background: #fff;
  color: var(--navy);
  border-color: #fff;
}
.hero-visual { position: relative; display: flex; align-items: center; justify-content: center; min-height: 360px; }
.hero-nodes { width: 100%; max-width: 420px; animation: floaty 6s ease-in-out infinite; }
.hero-nodes circle { animation: pulse 4s ease-in-out infinite; transform-origin: center; }
@keyframes floaty { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .55; } }
.hero-badge {
  position: absolute; bottom: 8px; right: 12px;
  font-family: var(--font-en); font-size: 12px; letter-spacing: 3px;
  color: rgba(255,255,255,.7); border: 1px solid rgba(255,255,255,.25);
  padding: 6px 12px; border-radius: 999px;
}

/* ---------- 关于我们 ---------- */
.about-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.about-block { background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12); border-radius: var(--radius); padding: 30px 28px; }
.about-block-title { font-size: 19px; font-weight: 700; color: #5fd4d4; margin-bottom: 14px; }
.about-block-text { color: rgba(255,255,255,.85); font-size: 15px; }
.about-values { list-style: none; display: flex; flex-wrap: wrap; gap: 10px; }
.about-values li {
  background: rgba(0,168,168,.20); color: #d6f4f4;
  padding: 8px 16px; border-radius: 999px; font-size: 14px; font-weight: 600;
  border: 1px solid rgba(0,168,168,.35);
}

/* ---------- 联系我们 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 40px; align-items: start; }
.contact-info {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 36px 32px; box-shadow: var(--shadow-sm);
}
.contact-info-title { font-size: 22px; font-weight: 700; color: var(--navy); margin-bottom: 22px; }
.contact-list { list-style: none; display: flex; flex-direction: column; gap: 22px; }
.contact-list li { display: flex; gap: 16px; align-items: flex-start; }
.contact-ico { flex-shrink: 0; width: 44px; height: 44px; border-radius: 12px; background: var(--light-blue); color: var(--teal); display: flex; align-items: center; justify-content: center; }
.contact-ico svg { width: 22px; height: 22px; }
.contact-label { font-size: 13px; color: var(--text-muted); margin-bottom: 2px; }
.contact-value { font-size: 16px; color: var(--text); font-weight: 500; }
.contact-value a { color: var(--teal-dark); }
.contact-value a:hover { text-decoration: underline; }
.contact-icp { margin-top: 26px; padding-top: 20px; border-top: 1px dashed var(--border); font-size: 14px; color: var(--text-2); }

.contact-form { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 36px 32px; box-shadow: var(--shadow-sm); }
.form-row { margin-bottom: 20px; }
.form-row label { display: block; font-size: 15px; font-weight: 600; color: var(--navy); margin-bottom: 8px; }
.req { color: #e0533d; }
.form-row input, .form-row textarea {
  width: 100%; padding: 12px 14px; font-size: 15px; font-family: var(--font-cn);
  border: 1.5px solid var(--border); border-radius: 10px; color: var(--text);
  background: #fbfdfe; transition: border-color .2s ease, box-shadow .2s ease; resize: vertical;
}
.form-row input:focus, .form-row textarea:focus {
  outline: none; border-color: var(--teal); box-shadow: 0 0 0 3px rgba(0,168,168,.15);
}
.form-row input.invalid, .form-row textarea.invalid { border-color: #e0533d; }
.form-error { display: block; min-height: 16px; margin-top: 6px; font-size: 13px; color: #e0533d; }
.form-submit { width: 100%; margin-top: 6px; }
.form-tip { margin-top: 14px; font-size: 14px; text-align: center; min-height: 20px; }
.form-tip.ok { color: var(--teal-dark); }
.form-tip.err { color: #e0533d; }

/* ---------- 页脚 ---------- */
.footer { background: var(--navy); color: rgba(255,255,255,.82); }
.footer-inner { display: grid; grid-template-columns: 1.4fr 1fr 1.4fr; gap: 40px; padding: 64px 24px 40px; }
.footer-brand { display: flex; flex-direction: column; align-items: center; text-align: center; }
.footer-logo { height: 80px; width: auto; margin-bottom: 16px; filter: brightness(0) invert(1); }
.footer-name { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 6px; }
.footer-slogan { font-size: 14px; color: #8fd4d4; letter-spacing: 2px; }
.footer-col-title { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 18px; }
.footer-links { display: flex; flex-direction: column; gap: 12px; }
.footer-links a, .footer-contact a { color: rgba(255,255,255,.78); font-size: 14px; transition: color .2s ease; }
.footer-links a:hover, .footer-contact a:hover { color: var(--teal); }
.footer-contact p { font-size: 14px; margin-bottom: 10px; color: rgba(255,255,255,.78); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); padding: 20px 0; }
.footer-bottom p { text-align: center; font-size: 13px; color: rgba(255,255,255,.6); }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .hero-title { font-size: 40px; }
  .about-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .section-title { font-size: 26px; }
  .nav-menu {
    position: fixed; top: var(--nav-h); left: 0; right: 0;
    flex-direction: column; align-items: flex-start; gap: 0;
    background: #fff; box-shadow: 0 12px 30px rgba(0,43,91,.12);
    padding: 10px 24px 20px; transform: translateY(-130%); transition: transform .3s ease;
  }
  .nav-menu.open { transform: translateY(0); }
  .nav-menu .nav-link { width: 100%; padding: 14px 0; color: var(--navy) !important; border-bottom: 1px solid var(--border); }
  .nav-menu .nav-link::after { display: none; }
  .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .navbar:not(.scrolled) .nav-toggle span { background: #fff; }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { min-height: 240px; order: -1; }
  .hero-title { font-size: 34px; }
  .hero-sub { font-size: 15px; }
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 30px; }
  .brand-logo { height: 42px; }
  .footer-logo { height: 64px; }
}

@media (max-width: 420px) {
  .container { padding: 0 18px; }
  .hero-title { font-size: 30px; }
  .btn { padding: 11px 20px; font-size: 14px; }
}