/* =========================================================
   正石国际 ZIS — Corporate site styles
   Brand: navy + gold logistics identity
   ========================================================= */
:root {
  --navy-950: #071528;
  --navy-900: #0a1f3d;
  --navy-800: #0d2b55;
  --navy-700: #134078;
  --navy-600: #1a56a0;
  --gold-400: #e3c35a;
  --gold-500: #c9a227;
  --gold-600: #a8841a;
  --sky-400: #5eb3e8;
  --ink: #1a2332;
  --ink-soft: #4a5568;
  --muted: #718096;
  --line: #e2e8f0;
  --paper: #ffffff;
  --fog: #f4f7fb;
  --fog-2: #ebf0f6;
  --danger: #c53030;
  --ok: #276749;
  --shadow: 0 12px 40px rgba(7, 21, 40, 0.12);
  --shadow-sm: 0 4px 16px rgba(7, 21, 40, 0.08);
  --radius: 6px;
  --header-h: 78px;
  --font-display: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --font-body: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-en: "Cormorant Garamond", Georgia, serif;
  --max: 1180px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--navy-600); text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--gold-600); }
ul { padding-left: 1.2em; }
button, input, select, textarea { font: inherit; }
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.25;
  color: var(--navy-900);
  margin: 0 0 .6em;
}
p { margin: 0 0 1em; color: var(--ink-soft); }

.container { width: min(100% - 40px, var(--max)); margin-inline: auto; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); border: 0;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  height: var(--header-h);
  background: linear-gradient(180deg, rgba(7,21,40,.96), rgba(10,31,61,.94));
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(201,162,39,.25);
}
.header-inner {
  height: 100%;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.brand {
  display: flex; align-items: center; gap: 12px; flex-shrink: 0;
  color: #fff;
}
.brand img, .brand svg { width: 48px; height: 48px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong {
  font-family: var(--font-display);
  font-size: 1.15rem; letter-spacing: .04em;
}
.brand-text span {
  font-size: .72rem; color: var(--gold-400); letter-spacing: .12em;
  font-family: var(--font-en); text-transform: uppercase;
}
.nav {
  display: flex; align-items: center; gap: 4px; flex-wrap: wrap; justify-content: flex-end;
}
.nav a {
  color: rgba(255,255,255,.86);
  padding: 8px 12px;
  font-size: .92rem;
  border-radius: 4px;
  position: relative;
}
.nav a:hover, .nav a.active { color: #fff; }
.nav a.active::after,
.nav a:hover::after {
  content: "";
  position: absolute; left: 12px; right: 12px; bottom: 4px;
  height: 2px; background: var(--gold-500);
}
.nav-cta {
  margin-left: 8px !important;
  background: var(--gold-500) !important;
  color: var(--navy-950) !important;
  font-weight: 600;
  padding: 8px 16px !important;
}
.nav-cta::after { display: none !important; }
.nav-cta:hover { background: var(--gold-400) !important; color: var(--navy-950) !important; }
.lang-switch {
  color: var(--gold-400) !important;
  border: 1px solid rgba(201,162,39,.45);
  margin-left: 4px;
}
.lang-switch::after { display: none !important; }
.menu-toggle {
  display: none;
  width: 44px; height: 44px;
  border: 1px solid rgba(255,255,255,.25);
  background: transparent; color: #fff; border-radius: 4px; cursor: pointer;
}
.menu-toggle span {
  display: block; width: 18px; height: 2px; margin: 4px auto; background: #fff;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  display: grid; align-items: end;
  color: #fff;
  overflow: hidden;
  background:
    linear-gradient(105deg, rgba(7,21,40,.88) 0%, rgba(10,31,61,.55) 48%, rgba(7,21,40,.35) 100%),
    url("../img/brochure/page_08.jpg") center/cover no-repeat;
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at 20% 80%, rgba(201,162,39,.18), transparent 45%),
    linear-gradient(to top, rgba(7,21,40,.75), transparent 40%);
  pointer-events: none;
}
.hero-inner {
  position: relative; z-index: 1;
  padding: 72px 0 88px;
  max-width: 720px;
}
.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 6vw, 4.2rem);
  color: #fff;
  margin: 0 0 12px;
  letter-spacing: .06em;
}
.hero-brand em {
  font-style: normal;
  color: var(--gold-400);
  font-family: var(--font-en);
  font-size: .55em;
  display: block;
  letter-spacing: .28em;
  margin-bottom: 8px;
  font-weight: 500;
}
.hero p {
  color: rgba(255,255,255,.86);
  font-size: 1.08rem;
  max-width: 34em;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 28px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 22px;
  border-radius: 4px;
  border: 1px solid transparent;
  font-weight: 600;
  cursor: pointer;
  transition: transform .2s var(--ease), background .2s, border-color .2s, color .2s;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--gold-500); color: var(--navy-950); }
.btn-primary:hover { background: var(--gold-400); color: var(--navy-950); }
.btn-ghost {
  background: transparent; color: #fff;
  border-color: rgba(255,255,255,.45);
}
.btn-ghost:hover { border-color: var(--gold-400); color: var(--gold-400); }
.btn-outline {
  background: transparent; color: var(--navy-700);
  border-color: var(--navy-700);
}
.btn-outline:hover { background: var(--navy-700); color: #fff; }

/* ---------- Sections ---------- */
.section { padding: 88px 0; }
.section-fog { background: var(--fog); }
.section-navy {
  background:
    linear-gradient(135deg, var(--navy-900), var(--navy-700));
  color: #fff;
}
.section-navy h2, .section-navy h3 { color: #fff; }
.section-navy p { color: rgba(255,255,255,.78); }
.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
}
.section-head .eyebrow {
  display: inline-block;
  font-family: var(--font-en);
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--gold-500);
  font-size: .78rem;
  margin-bottom: 10px;
}
.section-head h2 { font-size: clamp(1.7rem, 3vw, 2.2rem); margin-bottom: 12px; }
.section-head p { margin: 0; }
.rule {
  width: 48px; height: 2px; background: var(--gold-500);
  margin: 14px auto 0;
}

/* ---------- Values / cards as interaction blocks only when needed ---------- */
.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.value-item {
  text-align: center;
  padding: 28px 18px;
}
.value-icon {
  width: 64px; height: 64px; margin: 0 auto 16px;
  border-radius: 50%;
  display: grid; place-items: center;
  color: #fff; font-size: 1.4rem; font-weight: 700;
  font-family: var(--font-display);
}
.value-icon.red { background: linear-gradient(145deg, #e05353, #b83232); }
.value-icon.gold { background: linear-gradient(145deg, #e3c35a, #a8841a); }
.value-icon.blue { background: linear-gradient(145deg, #4a90d9, #1a56a0); }
.value-item h3 { margin-bottom: 8px; }

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.service-tile {
  position: relative;
  display: block;
  padding: 32px 26px 28px;
  background: var(--paper);
  border-top: 3px solid var(--navy-700);
  box-shadow: var(--shadow-sm);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s;
  color: inherit;
}
.service-tile:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-top-color: var(--gold-500);
  color: inherit;
}
.service-tile .num {
  font-family: var(--font-en);
  color: var(--gold-500);
  letter-spacing: .12em;
  font-size: .85rem;
  margin-bottom: 10px;
}
.service-tile h3 { font-size: 1.25rem; }
.service-tile p { margin-bottom: 16px; font-size: .95rem; }
.service-tile .more {
  color: var(--navy-600);
  font-weight: 600;
  font-size: .92rem;
}
.service-tile:hover .more { color: var(--gold-600); }

/* Stats strip */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 8px;
}
.stat {
  text-align: center;
  padding: 18px 10px;
  border-left: 1px solid rgba(255,255,255,.15);
}
.stat:first-child { border-left: 0; }
.stat strong {
  display: block;
  font-family: var(--font-en);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  color: var(--gold-400);
  font-weight: 600;
}
.stat span { color: rgba(255,255,255,.75); font-size: .92rem; }

/* Split layout */
.split {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 48px;
  align-items: center;
}
.split-media {
  position: relative;
  min-height: 360px;
  background: var(--navy-800) center/cover no-repeat;
  overflow: hidden;
}
.split-media::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(to top right, rgba(7,21,40,.35), transparent 50%);
}
.split-copy h2 { font-size: clamp(1.6rem, 2.5vw, 2rem); }
.checklist { list-style: none; padding: 0; margin: 18px 0 0; }
.checklist li {
  position: relative;
  padding: 8px 0 8px 28px;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line);
}
.checklist li::before {
  content: "";
  position: absolute; left: 0; top: 16px;
  width: 14px; height: 14px;
  border: 2px solid var(--gold-500);
  border-radius: 50%;
  box-shadow: inset 0 0 0 3px var(--paper);
  background: var(--gold-500);
}

/* Partners */
.partner-marquee {
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.partner-track {
  display: flex; gap: 18px; width: max-content;
  animation: marquee 36s linear infinite;
}
.partner-track:hover { animation-play-state: paused; }
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
.partner-badge {
  flex: 0 0 auto;
  min-width: 160px;
  height: 78px;
  display: grid; place-items: center;
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 12px 20px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--navy-800);
  font-size: .95rem;
}
.partner-badge span { opacity: .75; font-size: .72rem; font-weight: 500; display: block; }

/* News */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.news-item {
  display: flex; flex-direction: column;
  background: var(--paper);
  border-bottom: 2px solid transparent;
  transition: border-color .2s;
  color: inherit;
}
.news-item:hover { border-bottom-color: var(--gold-500); color: inherit; }
.news-thumb {
  aspect-ratio: 16/10;
  background: var(--fog-2) center/cover no-repeat;
}
.news-body { padding: 18px 4px 8px; }
.news-date {
  font-family: var(--font-en);
  color: var(--muted);
  font-size: .85rem;
  margin-bottom: 6px;
}
.news-body h3 { font-size: 1.1rem; margin-bottom: 8px; }

/* Page banner */
.page-banner {
  position: relative;
  padding: 72px 0 56px;
  background:
    linear-gradient(100deg, rgba(7,21,40,.92), rgba(19,64,120,.75)),
    url("../img/brochure/page_05.jpg") center/cover no-repeat;
  color: #fff;
}
.page-banner h1 {
  color: #fff;
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  margin-bottom: 8px;
}
.page-banner p { color: rgba(255,255,255,.8); margin: 0; max-width: 36em; }
.breadcrumb {
  display: flex; gap: 8px; flex-wrap: wrap;
  font-size: .88rem; margin-bottom: 18px; color: rgba(255,255,255,.65);
}
.breadcrumb a { color: var(--gold-400); }
.breadcrumb span { opacity: .5; }

/* Content prose */
.prose { max-width: 820px; }
.prose h2 { margin-top: 1.6em; font-size: 1.4rem; }
.prose h3 { margin-top: 1.3em; font-size: 1.15rem; }
.prose li { color: var(--ink-soft); margin-bottom: .35em; }

.content-grid {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 40px;
  align-items: start;
}
.side-nav {
  position: sticky; top: calc(var(--header-h) + 20px);
  background: var(--fog);
  padding: 18px 0;
  border-left: 3px solid var(--navy-700);
}
.side-nav a {
  display: block;
  padding: 10px 18px;
  color: var(--ink-soft);
  font-size: .94rem;
  border-left: 3px solid transparent;
  margin-left: -3px;
}
.side-nav a:hover, .side-nav a.active {
  color: var(--navy-700);
  background: rgba(26,86,160,.06);
  border-left-color: var(--gold-500);
}

.feature-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.feature-block {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.feature-block h3 { font-size: 1.05rem; margin-bottom: 6px; }
.feature-block p { margin: 0; font-size: .94rem; }

.timeline { position: relative; padding-left: 28px; }
.timeline::before {
  content: "";
  position: absolute; left: 7px; top: 6px; bottom: 6px;
  width: 2px; background: var(--line);
}
.timeline-item { position: relative; padding: 0 0 28px; }
.timeline-item::before {
  content: "";
  position: absolute; left: -28px; top: 8px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--gold-500);
  box-shadow: 0 0 0 4px rgba(201,162,39,.2);
}
.timeline-item time {
  font-family: var(--font-en);
  color: var(--gold-600);
  font-size: .9rem;
}

/* Terms table */
.term-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .94rem;
}
.term-table th, .term-table td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.term-table th {
  background: var(--navy-900);
  color: #fff;
  font-weight: 600;
}
.term-table tr:nth-child(even) td { background: var(--fog); }
.term-table code {
  font-family: ui-monospace, Consolas, monospace;
  color: var(--navy-700);
  font-weight: 600;
}

/* Track */
.track-frame {
  background: var(--paper);
  border: 1px solid var(--line);
  min-height: 520px;
  box-shadow: var(--shadow-sm);
}
.track-frame iframe {
  width: 100%;
  height: 560px;
  border: 0;
  display: block;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 40px;
}
.contact-card {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.contact-card h3 { font-size: 1rem; margin-bottom: 6px; color: var(--navy-700); }
.contact-card p { margin: 0; }
.form {
  background: var(--fog);
  padding: 28px;
}
.form-row { margin-bottom: 16px; }
.form label {
  display: block;
  margin-bottom: 6px;
  font-size: .9rem;
  color: var(--ink);
  font-weight: 600;
}
.form input, .form select, .form textarea {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: 4px;
  color: var(--ink);
  transition: border-color .2s, box-shadow .2s;
}
.form input:focus, .form select:focus, .form textarea:focus {
  outline: none;
  border-color: var(--navy-600);
  box-shadow: 0 0 0 3px rgba(26,86,160,.15);
}
.form textarea { min-height: 130px; resize: vertical; }
.form-msg {
  display: none;
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 4px;
  font-size: .92rem;
}
.form-msg.ok { display: block; background: #f0fff4; color: var(--ok); }
.form-msg.err { display: block; background: #fff5f5; color: var(--danger); }

.office-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.office {
  padding: 20px;
  background: var(--paper);
  border-left: 3px solid var(--navy-700);
  box-shadow: var(--shadow-sm);
}
.office h3 { font-size: 1rem; margin-bottom: 8px; }
.office p { margin: 0; font-size: .92rem; }

/* Footer */
.site-footer {
  background: var(--navy-950);
  color: rgba(255,255,255,.72);
  padding: 56px 0 28px;
  margin-top: 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 32px;
  margin-bottom: 40px;
}
.site-footer h4 {
  color: #fff;
  font-family: var(--font-body);
  font-size: .95rem;
  letter-spacing: .08em;
  margin-bottom: 16px;
}
.site-footer a { color: rgba(255,255,255,.72); }
.site-footer a:hover { color: var(--gold-400); }
.footer-brand strong {
  display: block;
  color: #fff;
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin-bottom: 10px;
}
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin-bottom: 8px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 20px;
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  font-size: .88rem;
}

/* Tools links */
.tool-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.tool-link {
  display: block;
  padding: 22px 20px;
  background: var(--paper);
  border: 1px solid var(--line);
  transition: border-color .2s, transform .2s;
  color: inherit;
}
.tool-link:hover {
  border-color: var(--gold-500);
  transform: translateY(-2px);
  color: inherit;
}
.tool-link strong { display: block; color: var(--navy-800); margin-bottom: 4px; }

/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .service-grid, .news-grid, .value-grid { grid-template-columns: 1fr 1fr; }
  .stats { grid-template-columns: 1fr 1fr; }
  .stat { border-left: 0; border-top: 1px solid rgba(255,255,255,.12); }
  .split, .content-grid, .contact-grid, .footer-grid { grid-template-columns: 1fr; }
  .side-nav { position: static; display: flex; overflow-x: auto; border-left: 0; border-bottom: 1px solid var(--line); padding: 0; }
  .side-nav a { white-space: nowrap; border-left: 0; border-bottom: 3px solid transparent; margin: 0; }
  .side-nav a.active, .side-nav a:hover { border-bottom-color: var(--gold-500); }
  .feature-list, .office-grid { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .menu-toggle { display: inline-block; }
  .nav {
    display: none;
    position: absolute; left: 0; right: 0; top: var(--header-h);
    flex-direction: column; align-items: stretch;
    background: var(--navy-900);
    padding: 12px 16px 20px;
    border-bottom: 1px solid rgba(201,162,39,.25);
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px 10px; }
  .nav-cta { margin: 8px 0 0 !important; text-align: center; }
  .service-grid, .news-grid, .value-grid, .tool-links { grid-template-columns: 1fr; }
  .hero { min-height: 78vh; align-items: center; }
  .hero-inner { padding: 56px 0; }
  .section { padding: 64px 0; }
  .footer-bottom { flex-direction: column; }
}