/* ============================================================
   智能仓储设备制造商官网 — 共享样式 v1.3
   色板 B「智造青绿」 · 方案见 docs/建站开发方案.md §4
   ============================================================ */

:root {
  /* 色彩（方案 4.1 对照表） */
  --color-ink: #0f161c;
  --color-surface-dark: #16202a;
  --color-surface: #f5f8f8;
  --color-surface-card: #ffffff;
  --color-primary: #00c9a7;
  --color-primary-strong: #0aa88c;
  --color-accent: #5eead4;
  --color-text: #1d2730;
  --color-text-inverse: #e8eef1;
  --color-muted: #5b6b76;
  --color-muted-inverse: #9db3bd;
  --color-line: #dde6e8;

  /* 字体与节奏 */
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  --space-section: clamp(72px, 9vw, 120px);
  --container: 1200px;
  --radius-card: 14px;
  --shadow-card: 0 8px 28px rgba(15, 60, 54, 0.08);
  --shadow-glow: 0 0 40px rgba(0, 201, 167, 0.18);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-surface);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--color-primary-strong); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- 双语切换 ---------- */
body[data-lang="en"] .tzh { display: none !important; }
body[data-lang="zh"] .ten { display: none !important; }

/* ---------- 布局通用 ---------- */
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: var(--space-section) 0; }
.section--dark { background: var(--color-ink); color: var(--color-text-inverse); }
.section--dark a { color: var(--color-accent); }
.section--pain { background: linear-gradient(180deg, #e7f4f1 0%, var(--color-surface) 100%); }
.section-head { max-width: 720px; margin: 0 auto 48px; text-align: center; }
.section-head .kicker {
  display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--color-primary-strong); margin-bottom: 12px;
}
.section--dark .section-head .kicker { color: var(--color-accent); }
.section-head h2 { font-size: clamp(26px, 3.4vw, 38px); line-height: 1.25; }
.section-head p { color: var(--color-muted); margin-top: 12px; }
.section--dark .section-head p { color: var(--color-muted-inverse); }

.btn {
  display: inline-block; padding: 12px 28px; border-radius: 999px; font-weight: 600;
  font-size: 15px; border: 1px solid transparent; cursor: pointer; transition: all 0.2s ease;
}
.btn--primary { background: var(--color-primary); color: #06231d; }
.btn--primary:hover { background: var(--color-primary-strong); text-decoration: none; transform: translateY(-1px); }
.btn--ghost { border-color: rgba(94, 234, 212, 0.5); color: var(--color-accent); background: transparent; }
.btn--ghost:hover { border-color: var(--color-accent); text-decoration: none; }
.btn--dark { border-color: var(--color-line); color: var(--color-text); background: transparent; }
.btn--dark:hover { border-color: var(--color-primary-strong); color: var(--color-primary-strong); text-decoration: none; }

/* ---------- 顶栏 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(15, 22, 28, 0.92); backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(94, 234, 212, 0.12);
}
.site-header .inner {
  max-width: var(--container); margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; gap: 24px; height: 68px;
}
.logo { display: flex; align-items: center; gap: 10px; color: var(--color-text-inverse); font-weight: 800; font-size: 18px; }
.logo:hover { text-decoration: none; }
.logo .mark {
  width: 34px; height: 34px; border-radius: 9px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #06231d; font-size: 15px; font-weight: 800;
}
.logo small { display: block; font-size: 10px; font-weight: 500; color: var(--color-muted-inverse); letter-spacing: 0.08em; }
.main-nav { display: flex; gap: 4px; margin-left: auto; flex-wrap: wrap; }
.main-nav a {
  color: var(--color-text-inverse); font-size: 14px; padding: 8px 12px; border-radius: 8px; opacity: 0.85;
}
.main-nav a:hover, .main-nav a[aria-current="page"] { opacity: 1; color: var(--color-accent); text-decoration: none; background: rgba(94, 234, 212, 0.08); }
.lang-switch { display: flex; border: 1px solid rgba(94, 234, 212, 0.35); border-radius: 999px; overflow: hidden; }
.lang-switch button {
  background: transparent; border: 0; color: var(--color-text-inverse); font-size: 12px;
  padding: 6px 12px; cursor: pointer; font-family: inherit;
}
.lang-switch button.active { background: var(--color-primary); color: #06231d; font-weight: 700; }
.header-cta { flex-shrink: 0; }
@media (max-width: 960px) {
  .main-nav { display: none; }
}

/* ---------- Hero ---------- */
.hero {
  background:
    radial-gradient(900px 420px at 78% -10%, rgba(0, 201, 167, 0.22), transparent 60%),
    radial-gradient(600px 320px at 8% 110%, rgba(94, 234, 212, 0.10), transparent 60%),
    var(--color-ink);
  color: var(--color-text-inverse);
  padding: calc(var(--space-section) * 0.9) 0;
}
.hero .grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 56px; align-items: center; }
.hero h1 { font-size: clamp(30px, 4.6vw, 52px); line-height: 1.2; }
.hero h1 em { font-style: normal; color: var(--color-primary); }
.hero .lead { margin: 20px 0 32px; color: var(--color-muted-inverse); font-size: clamp(15px, 1.6vw, 18px); max-width: 560px; }
.hero .actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero .facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 44px; }
.hero .fact b { display: block; font-size: clamp(22px, 2.6vw, 30px); color: var(--color-accent); }
.hero .fact span { font-size: 13px; color: var(--color-muted-inverse); }
.hero-visual {
  border: 1px solid rgba(94, 234, 212, 0.25); border-radius: 18px; background: var(--color-surface-dark);
  box-shadow: var(--shadow-glow); padding: 28px; display: grid; gap: 14px;
}
.hero-visual .row {
  display: flex; justify-content: space-between; align-items: center;
  background: rgba(94, 234, 212, 0.06); border: 1px solid rgba(94, 234, 212, 0.14);
  border-radius: 10px; padding: 14px 16px; font-size: 14px;
}
.hero-visual .row b { color: var(--color-accent); font-size: 18px; }
.hero-visual .caption { font-size: 12px; color: var(--color-muted-inverse); text-align: center; }
@media (max-width: 960px) { .hero .grid { grid-template-columns: 1fr; } .hero-visual { display: none; } }

/* ---------- 内页 Hero 与面包屑 ---------- */
.page-hero {
  background:
    radial-gradient(700px 340px at 80% -20%, rgba(0, 201, 167, 0.2), transparent 60%),
    var(--color-ink);
  color: var(--color-text-inverse);
  padding: clamp(56px, 7vw, 88px) 0;
}
.breadcrumb { font-size: 13px; color: var(--color-muted-inverse); margin-bottom: 18px; }
.breadcrumb a { color: var(--color-muted-inverse); }
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb .sep { margin: 0 8px; opacity: 0.5; }
.page-hero h1 { font-size: clamp(28px, 4vw, 44px); line-height: 1.2; }
.page-hero .lead { margin-top: 16px; color: var(--color-muted-inverse); max-width: 680px; font-size: clamp(14.5px, 1.5vw, 17px); }

/* ---------- 产品线（亮底） ---------- */
.cards-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
@media (max-width: 960px) { .cards-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .cards-4 { grid-template-columns: 1fr; } }
.product-card {
  background: var(--color-surface-card); border-radius: var(--radius-card); box-shadow: var(--shadow-card);
  padding: 28px 24px; border: 1px solid var(--color-line); transition: transform 0.2s ease;
  display: flex; flex-direction: column;
}
.product-card:hover { transform: translateY(-4px); }
.product-card .icon {
  width: 48px; height: 48px; border-radius: 12px; display: grid; place-items: center; font-size: 22px;
  background: linear-gradient(135deg, rgba(0, 201, 167, 0.14), rgba(94, 234, 212, 0.2)); margin-bottom: 18px;
}
.product-card h3 { font-size: 18px; margin-bottom: 8px; }
.product-card p { font-size: 14px; color: var(--color-muted); flex: 1; }
.product-card .more { margin-top: 16px; font-size: 14px; font-weight: 600; }

/* ---------- 痛点引导（浅青绿渐变底） ---------- */
.pain-card .icon { background: linear-gradient(135deg, rgba(10, 168, 140, 0.16), rgba(94, 234, 212, 0.12)); }
.pain-card h3 { font-size: 16.5px; }
.pain-card .tag {
  display: inline-block; font-size: 12px; font-weight: 700; color: #8a5a00;
  background: rgba(240, 180, 40, 0.16); border-radius: 999px; padding: 2px 10px; margin-bottom: 10px;
}
.pain-cta { margin-top: 40px; text-align: center; }

/* ---------- 解决方案（暗底） ---------- */
.sol-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
@media (max-width: 960px) { .sol-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .sol-grid { grid-template-columns: 1fr; } }
.sol-card {
  border: 1px solid rgba(94, 234, 212, 0.16); border-radius: var(--radius-card);
  background: var(--color-surface-dark); padding: 26px 22px; transition: border-color 0.2s ease;
}
.sol-card:hover { border-color: rgba(94, 234, 212, 0.45); }
.sol-card .icon { font-size: 24px; margin-bottom: 14px; }
.sol-card h3 { font-size: 17px; color: var(--color-text-inverse); margin-bottom: 8px; }
.sol-card p { font-size: 13.5px; color: var(--color-muted-inverse); }

/* ---------- 产品详情 split 行 ---------- */
.product-split {
  display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 48px; align-items: center;
  padding: clamp(48px, 6vw, 80px) 0;
  border-bottom: 1px solid var(--color-line);
}
.product-split:last-of-type { border-bottom: 0; }
.product-split.flip .txt { order: 2; }
.product-split.flip .panel { order: 1; }
@media (max-width: 960px) {
  .product-split { grid-template-columns: 1fr; gap: 28px; }
  .product-split.flip .txt { order: 1; }
  .product-split.flip .panel { order: 2; }
}
.product-split h2 { font-size: clamp(22px, 2.8vw, 30px); margin-bottom: 6px; }
.product-split .sub { font-size: 13px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-primary-strong); font-weight: 700; }
.product-split .desc { margin: 14px 0 18px; color: var(--color-muted); font-size: 15px; }
.feature-list { list-style: none; display: grid; gap: 10px; margin-bottom: 22px; }
.feature-list li { display: flex; gap: 10px; font-size: 14.5px; }
.feature-list li::before { content: "✓"; color: var(--color-primary-strong); font-weight: 700; flex-shrink: 0; }
.spec-panel {
  background: var(--color-ink); color: var(--color-text-inverse); border-radius: 16px;
  padding: 26px; box-shadow: var(--shadow-glow); display: grid; gap: 12px;
}
.spec-panel .row {
  display: flex; justify-content: space-between; gap: 14px;
  background: rgba(94, 234, 212, 0.06); border: 1px solid rgba(94, 234, 212, 0.14);
  border-radius: 10px; padding: 11px 15px; font-size: 13.5px;
}
.spec-panel .row span { color: var(--color-muted-inverse); }
.spec-panel .row b { color: var(--color-accent); font-weight: 700; }
.spec-panel .caption { font-size: 12px; color: var(--color-muted-inverse); text-align: center; }

/* ---------- 参数表 ---------- */
.spec-table-wrap { max-width: 860px; margin: 0 auto; }
.spec-table { width: 100%; border-collapse: collapse; background: var(--color-surface-card); box-shadow: var(--shadow-card); border-radius: var(--radius-card); overflow: hidden; }
.spec-table th, .spec-table td { text-align: left; padding: 14px 20px; font-size: 14.5px; border-bottom: 1px solid var(--color-line); }
.spec-table th { background: #eef6f4; font-weight: 700; width: 38%; }
.spec-table tr:last-child th, .spec-table tr:last-child td { border-bottom: 0; }
.spec-table td .tbd { color: #a4b2ba; font-size: 13px; }

/* ---------- 数据带 ---------- */
.stats-band {
  background: linear-gradient(120deg, var(--color-primary-strong), var(--color-primary) 55%, var(--color-accent));
  color: #06231d; padding: clamp(40px, 6vw, 64px) 0;
}
.stats-band .grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
@media (max-width: 760px) { .stats-band .grid { grid-template-columns: repeat(2, 1fr); } }
.stats-band b { display: block; font-size: clamp(26px, 3.4vw, 40px); line-height: 1.15; }
.stats-band span { font-size: 13.5px; opacity: 0.85; }

/* ---------- 案例（亮底） ---------- */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
@media (max-width: 960px) { .case-grid { grid-template-columns: 1fr; } }
.case-card {
  background: var(--color-surface-card); border-radius: var(--radius-card); box-shadow: var(--shadow-card);
  overflow: hidden; border: 1px solid var(--color-line); display: flex; flex-direction: column;
}
.case-card .thumb {
  height: 150px; display: grid; place-items: center; font-size: 40px;
  background: linear-gradient(135deg, #e7f6f2, #d3efe9);
}
.case-card .body { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.case-card .tag {
  align-self: flex-start; font-size: 12px; font-weight: 700; color: var(--color-primary-strong);
  background: rgba(0, 201, 167, 0.1); border-radius: 999px; padding: 3px 12px; margin-bottom: 12px;
}
.case-card h3 { font-size: 17px; margin-bottom: 8px; }
.case-card p { font-size: 13.5px; color: var(--color-muted); flex: 1; }
.case-card .note { margin-top: 14px; font-size: 12px; color: #a4b2ba; }

/* ---------- 服务流程（暗底） ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
@media (max-width: 960px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }
.step { position: relative; padding: 24px 22px; border-radius: var(--radius-card); background: var(--color-surface-dark); border: 1px solid rgba(94, 234, 212, 0.14); }
.step::before {
  counter-increment: step; content: "0" counter(step);
  font-size: 15px; font-weight: 800; color: var(--color-accent); letter-spacing: 0.1em;
}
.step h3 { font-size: 17px; color: var(--color-text-inverse); margin: 8px 0 8px; }
.step p { font-size: 13.5px; color: var(--color-muted-inverse); }

/* ---------- 信任带（亮底） ---------- */
.trust-row { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }
.trust-row .chip {
  display: inline-flex; align-items: center; gap: 8px; padding: 10px 20px;
  border: 1px solid var(--color-line); border-radius: 999px; background: var(--color-surface-card);
  font-size: 14px; color: var(--color-text); box-shadow: var(--shadow-card);
}
.trust-row .chip .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--color-primary); }

/* ---------- FAQ（GEO 块） ---------- */
.faq-wrap { max-width: 820px; margin: 0 auto; display: grid; gap: 12px; }
.faq-wrap details {
  background: var(--color-surface-card); border: 1px solid var(--color-line);
  border-radius: 12px; padding: 18px 22px; box-shadow: var(--shadow-card);
}
.faq-wrap summary { cursor: pointer; font-weight: 600; font-size: 16px; }
.faq-wrap details[open] summary { color: var(--color-primary-strong); margin-bottom: 8px; }
.faq-wrap p { font-size: 14px; color: var(--color-muted); }

/* ---------- CTA 表单（暗底） ---------- */
.cta-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
@media (max-width: 960px) { .cta-grid { grid-template-columns: 1fr; } }
.cta-grid h2 { font-size: clamp(24px, 3vw, 34px); line-height: 1.3; }
.cta-grid .points { margin-top: 24px; display: grid; gap: 12px; }
.cta-grid .points li { list-style: none; display: flex; gap: 10px; font-size: 14.5px; color: var(--color-muted-inverse); }
.cta-grid .points li::before { content: "✓"; color: var(--color-primary); font-weight: 700; }
.form-card {
  background: var(--color-surface-dark); border: 1px solid rgba(94, 234, 212, 0.2);
  border-radius: var(--radius-card); padding: 30px; box-shadow: var(--shadow-glow);
}
.form-card label { display: block; font-size: 13px; color: var(--color-muted-inverse); margin: 14px 0 6px; }
.form-card label:first-child { margin-top: 0; }
.form-card input, .form-card select, .form-card textarea {
  width: 100%; padding: 11px 14px; border-radius: 10px; border: 1px solid rgba(94, 234, 212, 0.2);
  background: rgba(15, 22, 28, 0.6); color: var(--color-text-inverse); font-family: inherit; font-size: 14px;
}
.form-card input:focus, .form-card select:focus, .form-card textarea:focus {
  outline: none; border-color: var(--color-primary);
}
.form-card .btn { width: 100%; margin-top: 20px; }
.form-card .form-note { font-size: 12px; color: var(--color-muted-inverse); margin-top: 12px; text-align: center; }

/* ---------- CTA 条带（内页轻转化） ---------- */
.cta-strip { background: var(--color-ink); color: var(--color-text-inverse); padding: clamp(44px, 6vw, 72px) 0; }
.cta-strip .inner { display: flex; align-items: center; justify-content: space-between; gap: 28px; flex-wrap: wrap; }
.cta-strip h2 { font-size: clamp(22px, 2.8vw, 30px); line-height: 1.3; }
.cta-strip p { color: var(--color-muted-inverse); margin-top: 8px; font-size: 14.5px; max-width: 560px; }
.cta-strip .actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--color-ink); color: var(--color-muted-inverse); padding: 56px 0 32px; border-top: 1px solid rgba(94, 234, 212, 0.1); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 36px; }
@media (max-width: 960px) { .footer-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .footer-grid { grid-template-columns: 1fr; } }
.site-footer h4 { color: var(--color-text-inverse); font-size: 14px; margin-bottom: 14px; letter-spacing: 0.06em; }
.site-footer ul { list-style: none; display: grid; gap: 8px; }
.site-footer a { color: var(--color-muted-inverse); font-size: 13.5px; }
.site-footer a:hover { color: var(--color-accent); }
.footer-bottom {
  margin-top: 44px; padding-top: 20px; border-top: 1px solid rgba(94, 234, 212, 0.1);
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 12.5px;
}