/* ==========================================================================
   Jiyuan Instrument — 英文站共用样式
   配色：深青绿主色（工业感）+ 白/浅灰底 + 深藏青文字
   ========================================================================== */

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

:root {
  --teal: #0f766e;
  --teal-l: #14b8a6;
  --teal-xl: #5eead4;
  --ink: #0b1220;
  --ink-2: #16233a;
  --gray: #5b6b7f;
  --line: #dde3ea;
  --bg: #f6f8fa;
}

body {
  font-family: "Segoe UI", -apple-system, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  line-height: 1.6;
  background: #fff;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ---------- 顶部导航 ---------- */
header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.logo { font-weight: 800; letter-spacing: .5px; font-size: 19px; color: var(--teal); }
.logo a { display: flex; align-items: baseline; gap: 10px; color: var(--teal); }
.logo span { font-size: 11px; color: var(--gray); font-weight: 600; letter-spacing: 1.6px; }
.menu { display: flex; gap: 26px; font-size: 14px; font-weight: 600; color: #33475b; }
.menu a:hover, .menu a.active { color: var(--teal); }
.nav-cta { background: var(--teal); color: #fff; padding: 10px 18px; border-radius: 6px; font-size: 13.5px; font-weight: 700; white-space: nowrap; }
.nav-cta:hover { background: #0b5f59; }

/* ---------- 通用区块 ---------- */
section { padding: 66px 0; }
.sec-alt { background: var(--bg); }
.sec-tag { font-size: 12px; letter-spacing: 2.2px; color: var(--teal); font-weight: 800; margin-bottom: 10px; }
h2 { font-size: 30px; font-weight: 800; letter-spacing: -.4px; line-height: 1.25; }
h3 { font-size: 18px; font-weight: 700; margin: 26px 0 10px; }
h4 { font-size: 15px; font-weight: 700; color: var(--teal); margin: 18px 0 8px; }
.sec-lead { font-size: 16px; color: var(--gray); margin-top: 12px; max-width: 800px; }
p { margin-bottom: 12px; }
ul, ol { margin: 10px 0 16px 22px; }
li { margin-bottom: 6px; }

/* ---------- 内页页头 ---------- */
.page-hero {
  background: linear-gradient(135deg, #082f38 0%, #0b4a52 55%, #0f766e 100%);
  color: #fff; padding: 58px 0 50px;
}
.page-hero .eyebrow { display: inline-block; font-size: 12px; letter-spacing: 2.4px; color: var(--teal-xl); font-weight: 700; margin-bottom: 14px; }
.page-hero h1 { font-size: 36px; line-height: 1.2; font-weight: 800; letter-spacing: -.5px; max-width: 900px; }
.page-hero p { font-size: 16.5px; margin-top: 16px; color: #cfe6e4; max-width: 760px; }
.breadcrumb { font-size: 13px; color: #9fc9c5; margin-bottom: 16px; }
.breadcrumb a:hover { color: var(--teal-xl); }

/* ---------- 按钮 ---------- */
.btn-primary, .btn-ghost, .btn-outline {
  display: inline-block; padding: 14px 26px; border-radius: 6px;
  font-weight: 800; font-size: 15px; transition: .18s;
}
.btn-primary { background: var(--teal-l); color: #06272b; }
.btn-primary:hover { background: var(--teal-xl); }
.btn-ghost { border: 1.5px solid rgba(255,255,255,.45); color: #fff; }
.btn-ghost:hover { border-color: #fff; background: rgba(255,255,255,.08); }
.btn-outline { border: 1.5px solid var(--teal); color: var(--teal); }
.btn-outline:hover { background: var(--teal); color: #fff; }
.btn-row { display: flex; gap: 14px; margin-top: 26px; flex-wrap: wrap; }

/* ---------- 卡片 ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(255px, 1fr)); gap: 20px; margin-top: 34px; }
.card {
  border: 1px solid var(--line); border-radius: 10px; padding: 24px 22px;
  background: #fff; transition: .18s; display: flex; flex-direction: column;
}
.card:hover { border-color: var(--teal-l); box-shadow: 0 8px 24px rgba(15,118,110,.10); transform: translateY(-2px); }
.card .kick { font-size: 11.5px; letter-spacing: 1.4px; color: var(--teal); font-weight: 800; }
.card h3 { font-size: 17.5px; margin: 10px 0 8px; line-height: 1.35; }
.card p { font-size: 14px; color: var(--gray); flex: 1; }
.card .tags { margin-top: 14px; display: flex; flex-wrap: wrap; gap: 6px; }
.chip { font-size: 11.5px; background: #eef6f5; color: var(--teal); border-radius: 20px; padding: 3px 10px; font-weight: 600; }

/* ---------- 型号块（产品页核心） ---------- */
.model-block {
  border: 1px solid var(--line); border-left: 4px solid var(--teal-l);
  border-radius: 0 10px 10px 0; padding: 22px 26px; margin-bottom: 20px; background: #fff;
}
.model-block.best { border-left-color: #f59e0b; background: #fffdf7; }
.model-head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 8px; }
.model-code {
  display: inline-block; background: var(--ink-2); color: var(--teal-xl);
  font-family: Consolas, "Courier New", monospace; font-size: 13.5px;
  padding: 3px 10px; border-radius: 4px; letter-spacing: .4px;
}
.model-name { font-size: 19px; font-weight: 800; }
.badge { font-size: 11px; font-weight: 800; letter-spacing: .8px; padding: 3px 9px; border-radius: 20px; background: #fef3c7; color: #92400e; }
.spec-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 10px 22px; margin: 14px 0 4px; }
.spec-item { font-size: 13.5px; color: #33475b; border-top: 1px dashed var(--line); padding-top: 8px; }
.spec-item b { display: block; font-size: 11.5px; letter-spacing: .6px; color: var(--teal); font-weight: 800; margin-bottom: 2px; }

/* ---------- 表格 ---------- */
table { width: 100%; border-collapse: collapse; margin: 22px 0 26px; font-size: 14.5px; }
th, td { border: 1px solid var(--line); padding: 12px 14px; text-align: left; vertical-align: top; }
th { background: #eef6f5; color: var(--teal); font-size: 13px; letter-spacing: .4px; }
td b { color: var(--ink); }
.table-scroll { overflow-x: auto; }

/* ---------- 痛点对比 ---------- */
.pain-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; margin-top: 30px; }
.panel { border-radius: 10px; padding: 26px 28px; }
.panel.bad { background: #fff5f5; border: 1px solid #fecaca; }
.panel.good { background: #f0fdfa; border: 1px solid #99f6e4; }
.panel h3 { font-size: 17px; margin-bottom: 14px; margin-top: 0; }
.panel.bad h3 { color: #b91c1c; }
.panel.good h3 { color: var(--teal); }
.panel ul { list-style: none; margin-left: 0; font-size: 14.5px; }
.panel li { padding-left: 24px; position: relative; margin-bottom: 10px; color: #33475b; }
.panel.bad li::before { content: "✕"; position: absolute; left: 0; color: #dc2626; font-weight: 800; }
.panel.good li::before { content: "✓"; position: absolute; left: 0; color: var(--teal); font-weight: 800; }

/* ---------- 技术命名卡 ---------- */
.tech-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 16px; margin-top: 30px; }
.tech { border-left: 3px solid var(--teal-l); background: #fff; border-radius: 0 8px 8px 0; padding: 16px 18px; box-shadow: 0 1px 3px rgba(0,0,0,.05); }
.tech b { display: block; font-size: 16px; color: var(--teal); font-weight: 800; }
.tech span { font-size: 13px; color: var(--gray); display: block; margin-top: 5px; }

/* ---------- 提示框 ---------- */
.note { background: #f0fdfa; border: 1px solid #99f6e4; border-radius: 8px; padding: 18px 22px; margin: 24px 0; font-size: 14.5px; }
.note b { color: var(--teal); }
.warn { background: #fffbeb; border: 1px solid #fcd34d; border-radius: 8px; padding: 18px 22px; margin: 24px 0; font-size: 14.5px; color: #78350f; }
.warn b { color: #b45309; }

/* ---------- 询盘表单 ---------- */
.contact { background: var(--ink-2); color: #fff; }
.contact h2 { color: #fff; }
.contact .sec-lead { color: #a9bdd1; }
.contact .sec-tag { color: var(--teal-xl); }
form.enquiry { margin-top: 30px; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field.full { grid-column: 1 / -1; }
form.enquiry label { font-size: 12.5px; color: #9fb3c8; font-weight: 600; }
form.enquiry input, form.enquiry select, form.enquiry textarea {
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.22);
  border-radius: 6px; padding: 11px 13px; color: #fff; font-size: 14px; font-family: inherit;
}
form.enquiry input::placeholder, form.enquiry textarea::placeholder { color: #7d93aa; }
form.enquiry input:focus, form.enquiry select:focus, form.enquiry textarea:focus {
  outline: none; border-color: var(--teal-l); background: rgba(255,255,255,.1);
}
form.enquiry option { color: #111; }
form.enquiry .submit {
  grid-column: 1 / -1; justify-self: start; background: var(--teal-l); color: #06272b;
  border: 0; padding: 15px 34px; border-radius: 6px; font-weight: 800; font-size: 15.5px; cursor: pointer;
}
form.enquiry .submit:hover { background: var(--teal-xl); }
form.enquiry .form-note { grid-column: 1 / -1; font-size: 12.5px; color: #8ba1b8; }

/* ---------- 页脚 ---------- */
footer { background: #060d18; color: #93a7bd; padding: 46px 0 26px; font-size: 13.5px; }
.foot-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1.2fr; gap: 30px; }
footer h5 { color: #fff; font-size: 13px; letter-spacing: 1.4px; margin-bottom: 14px; }
footer ul { list-style: none; margin: 0; }
footer li { margin-bottom: 8px; }
footer a:hover { color: var(--teal-xl); }
.foot-bottom { border-top: 1px solid #1b2a3d; margin-top: 34px; padding-top: 18px; font-size: 12px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }

/* ---------- 响应式 ---------- */
@media (max-width: 880px) {
  .pain-grid, .foot-grid { grid-template-columns: 1fr; }
  .page-hero h1 { font-size: 27px; }
  .page-hero { padding: 40px 0 34px; }
  .menu { display: none; }
  form.enquiry { grid-template-columns: 1fr; }
  h2 { font-size: 24px; }
  section { padding: 46px 0; }
}