/* ============================================================
   杭州连好科技贸易有限公司 — 官网样式
   Business blue · aviation-tech style · bilingual · responsive
   ============================================================ */

/* 品牌色取自官方 Logo（LH 翼形标志：蓝→绿渐变） */
:root {
  --blue-900: #02294F;
  --blue-800: #01417E;
  --blue-700: #013869;
  --blue-600: #0054A6;
  --blue-400: #00A0DC;
  --green-600: #0E8A3E;
  --green-500: #21A94E;
  --green-400: #66CC85;
  --sky: #8FD4F2;
  --brand-grad: linear-gradient(120deg, var(--blue-600) 0%, var(--green-500) 100%);
  --ink: #0f1f33;
  --muted: #5b6b7f;
  --bg: #ffffff;
  --bg-soft: #f2f9fb;
  --bg-alt: #e8f4f8;
  --border: #dfe9ee;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(0, 84, 166, 0.10);
  --max: 1180px;
  --header-h: 68px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, "Hiragino Sans GB", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

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

/* ---------- Language visibility ---------- */
.zh, .en { display: inline; }
body[data-lang="zh"] .en { display: none; }
body[data-lang="en"] .zh { display: none; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(150%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-wrap {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; }
.brand-logo { height: 42px; width: auto; display: block; }
.footer-brand .brand-logo { height: 52px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; font-size: 14px; }
.brand-text .en { font-size: 11px; color: var(--muted); }

.nav { display: flex; gap: 4px; }
.nav-link {
  padding: 8px 14px;
  font-size: 14px;
  color: var(--ink);
  border-radius: 8px;
  transition: background .2s, color .2s;
}
.nav-link:hover, .nav-link.active { background: var(--bg-soft); color: var(--blue-600); }

.nav-actions { display: flex; align-items: center; gap: 10px; }
.lang-toggle {
  border: 1px solid var(--blue-400);
  color: var(--blue-600);
  background: #fff;
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background .2s, color .2s;
}
.lang-toggle:hover { background: var(--blue-600); color: #fff; }

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 40px; height: 40px;
  border: none; background: transparent; cursor: pointer;
  align-items: center; justify-content: center;
}
.menu-toggle span { width: 22px; height: 2px; background: var(--ink); border-radius: 2px; transition: .25s; }
.menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 26px;
  border-radius: 999px;
  font-size: 15px; font-weight: 600;
  cursor: pointer; border: none;
  transition: transform .15s, box-shadow .2s, background .2s;
}
.btn-primary { background: var(--brand-grad); color: #fff; box-shadow: var(--shadow); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 34px rgba(0,84,166,.25); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  color: #fff;
  overflow: hidden;
  min-height: calc(100dvh - var(--header-h));
  display: flex;
  align-items: center;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-video {
  position: absolute; inset: 0; z-index: 0;
  width: 100%; height: 100%; object-fit: cover; display: block;
}
.hero-overlay {
  position: absolute; inset: 0; z-index: 0;
  background: linear-gradient(120deg, rgba(2,41,79,.82) 0%, rgba(1,65,126,.60) 45%, rgba(14,107,68,.55) 100%);
}
.hero-bg svg { position: relative; z-index: 1; width: 100%; height: 100%; display: block; }
.hero-inner { position: relative; z-index: 1; padding: 90px 0 70px; max-width: 900px; }
.hero-eyebrow {
  font-size: 13px; letter-spacing: .3px;
  color: var(--sky); margin: 0 0 18px;
  text-transform: uppercase;
}
.hero-title { font-size: clamp(30px, 5vw, 54px); line-height: 1.15; margin: 0 0 18px; font-weight: 700; }
.hero-title .en { display: block; font-size: clamp(16px, 2.4vw, 24px); font-weight: 500; color: var(--sky); margin-top: 8px; }
.hero-tagline {
  font-size: clamp(15px, 2vw, 20px);
  margin: 0 0 36px; color: #e8f1fb; font-weight: 500;
}

.hero-pillars { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 40px; }
.pillar {
  flex: 1 1 200px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(143,212,242,.35);
  border-radius: var(--radius);
  padding: 18px 18px 16px;
  display: flex; flex-direction: column; gap: 6px;
  backdrop-filter: blur(4px);
}
.pillar-num { font-size: 13px; color: var(--sky); font-weight: 700; letter-spacing: 1px; }
.pillar .zh { font-size: 18px; font-weight: 600; }
.pillar .en { font-size: 13px; color: #cfe2f5; }

.hero-cta { align-self: flex-start; }

.scroll-hint {
  position: absolute; left: 50%; bottom: 22px; transform: translateX(-50%);
  z-index: 1; color: #cfe2f5; font-size: 12px;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
}
.scroll-hint .arrow { width: 12px; height: 12px; border-right: 2px solid #cfe2f5; border-bottom: 2px solid #cfe2f5; transform: rotate(45deg); animation: bounce 1.8s infinite; }
@keyframes bounce { 0%,100%{ transform: translateY(0) rotate(45deg);} 50%{ transform: translateY(6px) rotate(45deg);} }

/* ---------- Sections ---------- */
.section { padding: 84px 0; }
.section-alt { background: var(--bg-soft); }
.section-head { margin-bottom: 44px; text-align: center; }
.section-kicker {
  font-size: 13px; letter-spacing: 3px; color: var(--blue-400);
  font-weight: 700; margin: 0 0 10px; text-transform: uppercase;
}
.section-title { font-size: clamp(24px, 3.4vw, 36px); margin: 0; font-weight: 700; }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; align-items: start; }
.about-text p { margin: 0 0 18px; color: #33445a; }
.about-text .en { color: #5b6b7f; }

.stats { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.stat {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px 18px; text-align: center; box-shadow: var(--shadow);
}
.stat-num { display: block; font-size: 34px; font-weight: 700; color: var(--blue-600); line-height: 1; }
.stat-num .plus, .stat-num .unit { font-size: 20px; }
.stat-num .unit.en { font-size: 16px; }
.stat-label { display: block; margin-top: 10px; font-size: 13px; color: var(--muted); }
.stat-label .en { font-size: 12px; }

.culture-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 44px; }
.culture-card { background: var(--brand-grad); color: #fff; border-radius: var(--radius); padding: 26px; }
.culture-card h3 { margin: 0 0 10px; font-size: 18px; }
.culture-card h3 .en { font-size: 13px; color: var(--sky); margin-left: 8px; font-weight: 500; }
.culture-cn { margin: 0; font-size: 15px; line-height: 1.7; }
.culture-cn .en { display: inline; color: #dbe8f6; font-size: 13px; }

.membership { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; margin-top: 36px; }
.member {
  border: 1px dashed var(--blue-400); color: var(--blue-700);
  padding: 10px 18px; border-radius: 999px; font-size: 13px; background: #fff;
}

/* ---------- About media (company showreel) ---------- */
.about-media { margin-top: 44px; }
.about-video {
  width: 100%; aspect-ratio: 16 / 9; object-fit: cover; display: block;
  border-radius: var(--radius); box-shadow: var(--shadow);
  border: 1px solid var(--border); background: var(--blue-900);
}
.about-media-cap { text-align: center; margin: 14px 0 0; font-size: 14px; color: var(--muted); }
.about-media-cap .en { color: var(--muted); }

/* ---------- Business ---------- */
.biz-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.biz-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow); transition: transform .2s, box-shadow .2s;
}
.biz-card:hover { transform: translateY(-4px); box-shadow: 0 18px 40px rgba(0,84,166,.16); }
.biz-icon {
  width: 50px; height: 50px; border-radius: 12px;
  background: var(--bg-alt); color: var(--blue-600);
  display: grid; place-items: center; font-size: 24px; margin-bottom: 16px;
}
.biz-title { margin: 0 0 14px; font-size: 20px; }
.biz-title .en { display: block; font-size: 13px; color: var(--blue-400); font-weight: 500; margin-top: 2px; }
.biz-card ul { margin: 0; padding-left: 18px; color: #33445a; }
.biz-card ul li { margin-bottom: 8px; }
.biz-card ul li .en { color: #5b6b7f; font-size: 13px; }

/* ---------- Partners ---------- */
.partner-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.partner-head { font-size: 18px; margin: 0 0 16px; padding-bottom: 10px; border-bottom: 2px solid var(--blue-400); }
.partner-head .en { color: var(--blue-400); font-size: 13px; margin-left: 8px; }
.chips { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 10px; }
.chips li {
  background: #fff; border: 1px solid var(--border); border-radius: 999px;
  padding: 8px 14px; font-size: 13px; color: var(--blue-700); font-weight: 600;
}
.chips li em { font-style: normal; font-weight: 400; color: var(--muted); margin-left: 6px; }
.chips li .en { color: var(--muted); }

.history-note {
  margin-top: 40px; background: var(--bg-alt); border-radius: var(--radius);
  padding: 26px 28px; border-left: 4px solid var(--blue-600);
}
.history-note h3 { margin: 0 0 10px; font-size: 18px; }
.history-note h3 .en { color: var(--blue-400); font-size: 13px; margin-left: 8px; }
.history-note p { margin: 0; color: #33445a; }

/* ---------- Global ---------- */
.global-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.office {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px 18px; text-align: center; box-shadow: var(--shadow);
  transition: transform .2s, background .2s, color .2s;
}
.office:hover { transform: translateY(-4px); background: var(--brand-grad); color: #fff; }
.office-cn { display: block; font-size: 20px; font-weight: 600; }
.office-en { display: block; font-size: 13px; color: var(--blue-400); margin-top: 4px; letter-spacing: .5px; }
.office:hover .office-en { color: var(--sky); }

/* ---------- World map (Tencent Maps) ---------- */
.world-map-wrap { margin-top: 36px; }
.world-map {
  width: 100%;
  height: 440px;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  background: var(--bg-alt);
}
.map-caption { margin: 12px 0 0; font-size: 12px; color: var(--muted); text-align: center; }

/* ---------- Contact ---------- */
.block-title { font-size: 20px; margin: 0 0 20px; }
.block-title .en { color: var(--blue-400); font-size: 14px; margin-left: 8px; font-weight: 500; }

.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 48px; }
.member-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px 16px; text-align: center; box-shadow: var(--shadow);
}
.m-name { display: block; font-size: 18px; font-weight: 600; margin-bottom: 6px; }
.m-role { font-size: 13px; color: var(--blue-600); }
.m-role .en { color: var(--muted); font-size: 12px; }

.contact-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.contact-card {
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px;
}
.c-label { display: block; font-size: 12px; letter-spacing: 1px; color: var(--blue-400); font-weight: 700; text-transform: uppercase; margin-bottom: 8px; }
.contact-card p { margin: 0; color: #33445a; }
.contact-card a { color: var(--blue-600); font-weight: 600; }

.contact-form { margin-top: 48px; background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 30px; box-shadow: var(--shadow); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.contact-form label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }
.contact-form label.full { margin-bottom: 16px; }
.contact-form input, .contact-form textarea {
  border: 1px solid var(--border); border-radius: 10px; padding: 11px 14px;
  font: inherit; color: var(--ink); background: var(--bg-soft); resize: vertical;
}
.contact-form input:focus, .contact-form textarea:focus { outline: none; border-color: var(--blue-400); background: #fff; }
.contact-form .btn { margin-top: 6px; }
.form-note { margin: 14px 0 0; color: var(--blue-600); font-weight: 600; }
.form-hint { margin: 10px 0 0; font-size: 12px; color: var(--muted); }

/* ---------- Footer ---------- */
.site-footer { background: var(--blue-900); color: #cfe0f1; padding: 40px 0; }
.footer-wrap { display: flex; flex-wrap: wrap; gap: 24px; justify-content: space-between; align-items: center; }
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-brand .brand-mark { background: rgba(255,255,255,.12); }
.f-name { margin: 0; font-weight: 600; color: #fff; font-size: 15px; }
.f-copy { margin: 4px 0 0; font-size: 12px; color: #9db8d4; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 8px 18px; }
.footer-nav a { font-size: 13px; color: #bcd2ea; }
.footer-nav a:hover { color: #fff; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; }
  .partner-cols { grid-template-columns: 1fr; }
  .global-grid { grid-template-columns: repeat(2, 1fr); }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .nav { position: fixed; top: var(--header-h); left: 0; right: 0;
    flex-direction: column; gap: 0; background: #fff; border-bottom: 1px solid var(--border);
    padding: 8px 0; transform: translateY(-120%); transition: transform .3s; box-shadow: var(--shadow); }
  .nav.open { transform: translateY(0); }
  .nav-link { padding: 14px 24px; border-radius: 0; }
  .menu-toggle { display: flex; }
}

@media (max-width: 560px) {
  .section { padding: 60px 0; }
  .biz-grid { grid-template-columns: 1fr; }
  .culture-grid { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr 1fr; }
  .global-grid { grid-template-columns: 1fr 1fr; }
  .team-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .hero-pillars { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
  .scroll-hint .arrow { animation: none; }
}