/* ============ QIANWEI Zipper - Global Styles ============ */
:root {
  --navy: #0e1c2f;
  --navy-2: #16283f;
  --navy-3: #1e3a5f;
  --gold: #c8a24b;
  --gold-2: #e0c079;
  --ink: #22303f;
  --gray: #5c6b7a;
  --bg: #ffffff;
  --bg-soft: #f4f6f9;
  --line: #e6eaef;
  --radius: 10px;
  --shadow: 0 10px 34px rgba(14, 28, 47, 0.08);
  --shadow-lg: 0 24px 60px rgba(14, 28, 47, 0.14);
  --font: "Segoe UI", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
.container { width: min(1200px, 92%); margin: 0 auto; }

/* ---------- Top bar ---------- */
.topbar {
  background: var(--navy);
  color: rgba(255,255,255,0.82);
  font-size: 13px;
  padding: 7px 0;
}
.topbar .container { display: flex; justify-content: space-between; align-items: center; }
.topbar .slogan i { color: var(--gold); margin-right: 6px; }
.topbar .right span { margin-left: 18px; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-logo { height: 44px; width: auto; }
.brand .brand-name { line-height: 1.2; }
.brand .brand-name strong { font-size: 21px; color: var(--navy); letter-spacing: 2px; }
.brand .brand-name span { font-size: 11px; color: var(--gray); letter-spacing: 3px; text-transform: uppercase; }

.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
  padding: 8px 18px; border-radius: 6px; font-size: 15.5px; color: var(--ink);
  transition: all .2s;
}
.nav-links a:hover { color: var(--gold); background: rgba(200,162,75,0.08); }
.nav-links a.active { color: var(--gold); font-weight: 600; }

/* Language switcher */
.lang-switch { position: relative; margin-left: 14px; }
.lang-btn {
  display: flex; align-items: center; gap: 7px;
  padding: 7px 14px; border: 1px solid var(--line); border-radius: 30px;
  background: #fff; cursor: pointer; font-size: 14px; color: var(--ink);
  transition: all .2s;
}
.lang-btn:hover { border-color: var(--gold); color: var(--gold); }
.lang-menu {
  position: absolute; top: calc(100% + 8px); right: 0; min-width: 130px;
  background: #fff; border: 1px solid var(--line); border-radius: 10px;
  box-shadow: var(--shadow); padding: 6px; display: none; z-index: 50;
}
.lang-menu.show { display: block; }
.lang-menu button {
  display: block; width: 100%; text-align: left; padding: 9px 12px;
  border: none; background: none; cursor: pointer; border-radius: 6px;
  font-size: 14px; color: var(--ink); font-family: inherit;
}
.lang-menu button:hover { background: var(--bg-soft); color: var(--gold); }
.lang-menu button.current { color: var(--gold); font-weight: 600; }

/* Hamburger */
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; }
.hamburger span { width: 24px; height: 2px; background: var(--navy); border-radius: 2px; transition: .3s; }

/* ---------- Hero ---------- */
.hero {
  position: relative; color: #fff; overflow: hidden;
  background:
    linear-gradient(120deg, rgba(11,22,38,0.92) 0%, rgba(22,40,63,0.86) 50%, rgba(30,58,95,0.72) 100%),
    url("../images/company.jpg") center/cover no-repeat;
}
.hero-inner { position: relative; z-index: 2; padding: 130px 0 150px; }
.hero .kicker {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid rgba(200,162,75,0.5); color: var(--gold-2);
  padding: 6px 16px; border-radius: 30px; font-size: 13.5px; letter-spacing: 2px;
  margin-bottom: 26px; background: rgba(200,162,75,0.08);
}
.hero h1 { font-size: clamp(34px, 5vw, 58px); line-height: 1.18; font-weight: 800; letter-spacing: 1px; max-width: 760px; }
.hero h1 em { font-style: normal; color: var(--gold-2); }
.hero p { margin-top: 22px; font-size: clamp(15px, 1.6vw, 18px); color: rgba(255,255,255,0.82); max-width: 640px; }
.hero-actions { margin-top: 38px; display: flex; gap: 16px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 13px 32px; border-radius: 40px; font-size: 15px; font-weight: 600;
  transition: all .25s; cursor: pointer; border: none; font-family: inherit;
}
.btn-gold { background: linear-gradient(135deg, var(--gold), #d8b45e); color: #141414; }
.btn-gold:hover { transform: translateY(-3px); box-shadow: 0 12px 30px rgba(200,162,75,0.4); }
.btn-ghost { border: 1.5px solid rgba(255,255,255,0.6); color: #fff; background: transparent; }
.btn-ghost:hover { background: rgba(255,255,255,0.1); transform: translateY(-3px); }
.hero .scroll-hint {
  position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%);
  color: rgba(255,255,255,0.5); font-size: 12px; letter-spacing: 3px; text-align: center; z-index: 2;
}
.hero .scroll-hint::after {
  content: ""; display: block; width: 1px; height: 36px; margin: 8px auto 0;
  background: linear-gradient(to bottom, var(--gold), transparent);
}
.hero-stats {
  position: relative; z-index: 2; margin-top: -56px;
  background: #fff; border-radius: 16px; box-shadow: var(--shadow-lg);
  padding: 30px 40px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.hero-stats .stat { text-align: center; }
.hero-stats .stat .num { font-size: 32px; font-weight: 800; color: var(--navy); }
.hero-stats .stat .num span { color: var(--gold); }
.hero-stats .stat .label { font-size: 13.5px; color: var(--gray); margin-top: 2px; }
.hero-stats .stat + .stat { border-left: 1px solid var(--line); }

/* ---------- Sections ---------- */
.section { padding: 96px 0; }
.section.bg-soft { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 700px; margin: 0 auto 56px; }
.section-head .tag {
  display: inline-block; color: var(--gold); font-size: 13px; font-weight: 700;
  letter-spacing: 4px; text-transform: uppercase; margin-bottom: 12px;
}
.section-head h2 { font-size: clamp(26px, 3.4vw, 40px); color: var(--navy); font-weight: 800; letter-spacing: 1px; }
.section-head p { margin-top: 14px; color: var(--gray); font-size: 16px; }
.section-head .rule { width: 56px; height: 3px; background: var(--gold); border-radius: 3px; margin: 18px auto 0; }

/* ---------- Feature cards ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.feature-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 34px 28px; transition: all .3s; position: relative; overflow: hidden;
}
.feature-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--gold), transparent); opacity: 0; transition: opacity .3s;
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
.feature-card:hover::before { opacity: 1; }
.feature-card .icon {
  width: 56px; height: 56px; border-radius: 14px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--navy), var(--navy-3)); color: var(--gold); margin-bottom: 20px;
}
.feature-card h3 { font-size: 19px; color: var(--navy); margin-bottom: 10px; }
.feature-card p { font-size: 14.5px; color: var(--gray); }

/* ---------- Products preview ---------- */
.grid-3.preview { margin-top: 10px; }
.product-card {
  background: #fff; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--line); transition: all .3s; display: flex; flex-direction: column;
}
.product-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.product-card .img { aspect-ratio: 1/1; overflow: hidden; background: var(--bg-soft); }
.product-card .img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.product-card:hover .img img { transform: scale(1.07); }
.product-card .body { padding: 24px; flex: 1; }
.product-card .body h3 { font-size: 19px; color: var(--navy); }
.product-card .body .sub { color: var(--gold); font-size: 13px; letter-spacing: 1px; margin-top: 4px; }
.product-card .body p { color: var(--gray); font-size: 14.5px; margin-top: 10px; }
.product-card .foot { padding: 0 24px 22px; }
.link-more {
  display: inline-flex; align-items: center; gap: 6px; color: var(--navy);
  font-size: 14px; font-weight: 600; transition: all .2s;
}
.link-more:hover { color: var(--gold); gap: 10px; }

/* ---------- Why us ---------- */
.why-wrap { display: grid; grid-template-columns: 1.05fr 1fr; gap: 60px; align-items: center; }
.why-img { border-radius: 16px; overflow: hidden; box-shadow: var(--shadow-lg); }
.why-img img { width: 100%; height: 100%; object-fit: cover; }
.why-list { display: grid; gap: 16px; margin-top: 30px; }
.why-item { display: flex; gap: 16px; align-items: flex-start; }
.why-item .tick {
  flex: 0 0 26px; width: 26px; height: 26px; border-radius: 50%;
  background: linear-gradient(135deg, var(--gold), var(--gold-2)); color: #141414;
  display: grid; place-items: center; font-size: 13px; font-weight: 800; margin-top: 3px;
}
.why-item h4 { font-size: 16px; color: var(--navy); }
.why-item p { font-size: 14px; color: var(--gray); }

/* ---------- CTA banner ---------- */
.cta {
  background: linear-gradient(120deg, var(--navy), #1b3a5e);
  padding: 74px 0; color: #fff; text-align: center;
}
.cta h2 { font-size: clamp(24px, 3vw, 36px); font-weight: 800; letter-spacing: 1px; }
.cta p { color: rgba(255,255,255,0.78); margin: 14px auto 34px; max-width: 560px; }

/* ---------- Footer ---------- */
.site-footer { background: #0a1322; color: rgba(255,255,255,0.72); }
.footer-main { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 44px; padding: 64px 0 44px; }
.site-footer h4 { color: #fff; font-size: 16px; margin-bottom: 18px; letter-spacing: 1px; }
.site-footer h4::after { content: ""; display: block; width: 26px; height: 2px; background: var(--gold); margin-top: 8px; }
.footer-main p { font-size: 14px; line-height: 1.9; }
.footer-links li { margin-bottom: 10px; font-size: 14px; }
.footer-links a:hover { color: var(--gold); }
.footer-contact li { margin-bottom: 12px; font-size: 14px; display: flex; gap: 10px; align-items: flex-start; }
.footer-contact i { color: var(--gold); font-style: normal; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08); padding: 20px 0; text-align: center;
  font-size: 13px; color: rgba(255,255,255,0.4);
}

/* ---------- Page hero (subpages) ---------- */
.page-hero {
  background: linear-gradient(120deg, #0b1626, var(--navy-2) 60%, #1b3a5e);
  color: #fff; padding: 84px 0 92px; text-align: center; position: relative; overflow: hidden;
}
.page-hero h1 { font-size: clamp(30px, 4vw, 44px); font-weight: 800; letter-spacing: 2px; }
.page-hero .crumbs { margin-top: 16px; font-size: 13.5px; color: rgba(255,255,255,0.65); letter-spacing: 1px; }
.page-hero .crumbs a:hover { color: var(--gold); }
.page-hero .crumbs .sep { margin: 0 10px; color: rgba(255,255,255,0.3); }

/* ---------- About ---------- */
.about-intro { display: grid; grid-template-columns: 1fr 1.1fr; gap: 60px; align-items: center; }
.about-intro .photo { border-radius: 16px; overflow: hidden; box-shadow: var(--shadow-lg); }
.about-intro h2 { font-size: 28px; color: var(--navy); font-weight: 800; }
.about-intro .lead { color: var(--gold); font-size: 15px; margin: 10px 0 18px; letter-spacing: 1px; }
.about-intro p { color: var(--gray); font-size: 15px; margin-bottom: 14px; }
.motto-box {
  margin-top: 28px; background: linear-gradient(120deg, var(--navy), var(--navy-3));
  color: #fff; border-radius: 12px; padding: 22px 26px; display: flex; align-items: center; gap: 16px;
}
.motto-box .q { font-size: 34px; color: var(--gold); font-weight: 800; }
.motto-box p { color: #fff; margin: 0; font-size: 15px; letter-spacing: 1px; }

.milestones { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; margin-top: 10px; }
.milestone {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 24px; text-align: center; transition: all .3s;
}
.milestone:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.milestone .num { font-size: 34px; font-weight: 800; color: var(--navy); }
.milestone .num em { font-style: normal; color: var(--gold); }
.milestone .txt { color: var(--gray); font-size: 14px; margin-top: 6px; }

.fields-tags { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.field-tag {
  border: 1px solid var(--line); background: #fff; border-radius: 30px;
  padding: 10px 26px; font-size: 15px; color: var(--navy); transition: all .25s;
}
.field-tag:hover { border-color: var(--gold); color: var(--gold); transform: translateY(-2px); }

/* ---------- Products page ---------- */
.product-layout { display: grid; grid-template-columns: 250px 1fr; gap: 44px; align-items: start; }
.product-sidebar {
  position: sticky; top: 100px; background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px 16px;
}
.product-sidebar h3 { font-size: 15px; color: var(--navy); padding: 0 12px 14px; border-bottom: 1px solid var(--line); margin-bottom: 10px; letter-spacing: 1px; }
.product-sidebar a {
  display: block; padding: 11px 14px; border-radius: 8px; font-size: 14.5px; color: var(--gray);
  transition: all .2s; margin-bottom: 2px;
}
.product-sidebar a:hover { background: var(--bg-soft); color: var(--gold); }
.product-sidebar a.active { background: var(--navy); color: #fff; font-weight: 600; }

.product-block { margin-bottom: 74px; scroll-margin-top: 110px; }
.product-block-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 24px; }
.product-block-head h2 { font-size: 26px; color: var(--navy); font-weight: 800; display: flex; align-items: center; gap: 14px; }
.product-block-head h2 .idx {
  width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--navy), var(--navy-3)); color: var(--gold); font-size: 16px;
}
.product-block-head .tagline { color: var(--gold); font-size: 14.5px; letter-spacing: 1px; }
.product-block-head .sizes {
  background: var(--bg-soft); border: 1px solid var(--line); border-radius: 30px;
  padding: 7px 18px; font-size: 13.5px; color: var(--navy);
}
.product-block-head .sizes b { color: var(--gold); }

.product-gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.product-gallery img {
  width: 100%; aspect-ratio: 1/1; object-fit: cover; border-radius: var(--radius);
  border: 1px solid var(--line); transition: all .3s;
}
.product-gallery img:hover { transform: scale(1.03); box-shadow: var(--shadow); }
.product-desc {
  display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 24px;
}
.product-desc .box { background: var(--bg-soft); border-radius: var(--radius); padding: 24px; }
.product-desc .box h4 { font-size: 15px; color: var(--navy); margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.product-desc .box h4 .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--gold); }
.product-desc ul li { font-size: 14px; color: var(--gray); padding: 5px 0 5px 18px; position: relative; }
.product-desc ul li::before { content: "›"; position: absolute; left: 0; color: var(--gold); font-weight: 800; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 50px; align-items: start; }
.contact-info-card {
  background: linear-gradient(135deg, var(--navy), var(--navy-3)); color: #fff;
  border-radius: 16px; padding: 38px 34px;
}
.contact-info-card h3 { font-size: 21px; font-weight: 800; margin-bottom: 8px; }
.contact-info-card .sub { color: rgba(255,255,255,0.65); font-size: 14px; margin-bottom: 30px; }
.contact-row { display: flex; gap: 16px; padding: 16px 0; border-bottom: 1px solid rgba(255,255,255,0.1); }
.contact-row .ic {
  flex: 0 0 46px; width: 46px; height: 46px; border-radius: 12px;
  background: rgba(255,255,255,0.1); display: grid; place-items: center; color: var(--gold-2);
  font-size: 20px; font-weight: 800;
}
.contact-row .t { font-size: 13px; color: rgba(255,255,255,0.6); }
.contact-row .v { font-size: 15.5px; font-weight: 600; margin-top: 2px; word-break: break-all; }

.contact-form { background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 34px; box-shadow: var(--shadow); }
.contact-form h3 { font-size: 20px; color: var(--navy); margin-bottom: 6px; }
.contact-form .sub { color: var(--gray); font-size: 14px; margin-bottom: 26px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13.5px; color: var(--ink); margin-bottom: 7px; font-weight: 600; }
.form-group input, .form-group textarea, .form-group select {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: 9px;
  font-size: 14.5px; font-family: inherit; color: var(--ink); background: #fbfcfd; transition: all .2s;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  outline: none; border-color: var(--gold); box-shadow: 0 0 0 3px rgba(200,162,75,0.12); background: #fff;
}
.form-group textarea { resize: vertical; min-height: 120px; }
.btn-submit {
  width: 100%; padding: 14px; border: none; border-radius: 9px; cursor: pointer;
  background: linear-gradient(135deg, var(--navy), var(--navy-3)); color: #fff;
  font-size: 15.5px; font-weight: 700; letter-spacing: 2px; transition: all .25s; font-family: inherit;
}
.btn-submit:hover { background: linear-gradient(135deg, var(--gold), #d8b45e); color: #141414; transform: translateY(-2px); box-shadow: 0 10px 26px rgba(200,162,75,0.35); }
.form-note { font-size: 12.5px; color: #9aa7b4; text-align: center; margin-top: 12px; }

/* ---------- Misc ---------- */
.text-center { text-align: center; }
.mt-20 { margin-top: 20px; }
.mt-40 { margin-top: 40px; }
.map-box { border-radius: 16px; overflow: hidden; border: 1px solid var(--line); min-height: 320px; background: var(--bg-soft); display: grid; place-items: center; }
.map-box .ph { color: var(--gray); font-size: 15px; }

/* ---------- Contact logo card ---------- */
.contact-logo-card {
  background: #fff; border: 1px solid var(--line); border-radius: 16px;
  padding: 60px 40px; box-shadow: var(--shadow); text-align: center;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  min-height: 100%;
}
.contact-logo-card img { max-width: 360px; width: 90%; margin-bottom: 30px; }
.contact-logo-card h3 { font-size: 26px; color: var(--navy); font-weight: 800; }
.contact-logo-card h3 span { display: block; font-size: 15px; color: var(--gray); letter-spacing: 3px; margin-top: 6px; }
.contact-logo-card p { color: var(--gray); font-size: 15px; max-width: 320px; margin: 14px 0 30px; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 18px; padding: 24px; }
  .hero-stats .stat:nth-child(3) { border-left: none; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .why-wrap, .about-intro, .contact-grid { grid-template-columns: 1fr; }
  .product-layout { grid-template-columns: 1fr; }
  .product-sidebar { position: static; display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
  .product-sidebar h3 { width: 100%; }
  .footer-main { grid-template-columns: 1fr 1fr; }
  .milestones { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .nav-links {
    position: fixed; top: 0; right: -100%; width: min(300px, 78vw); height: 100vh;
    background: #fff; flex-direction: column; align-items: flex-start; gap: 4px;
    padding: 90px 28px; box-shadow: -20px 0 60px rgba(0,0,0,0.12); transition: right .35s;
  }
  .nav-links.open { right: 0; }
  .hamburger { display: flex; z-index: 120; }
  .grid-3, .product-gallery { grid-template-columns: 1fr; }
  .product-desc, .form-row { grid-template-columns: 1fr; }
  .footer-main { grid-template-columns: 1fr; gap: 30px; }
  .topbar .right span { display: none; }
  .hero-stats { grid-template-columns: 1fr; }
  .hero-stats .stat + .stat { border-left: none; border-top: 1px solid var(--line); padding-top: 16px; }
  .milestones { grid-template-columns: 1fr; }
  .hero-inner { padding: 90px 0 120px; }
}