/* ============ LINKROAD ============ */
:root {
  --red: #e6212a;
  --red-dark: #c4161e;
  --ink: #342c2a;
  --ink-2: #221c1b;
  --muted: #6f6661;
  --line: #ece7e4;
  --soft: #faf8f7;
  --white: #fff;
  --radius: 14px;
  --max: 1180px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0; line-height: 1.25; letter-spacing: -.01em; }
p { margin: 0; }

.wrap { width: min(100% - 48px, var(--max)); margin-inline: auto; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--red); color: #fff;
  padding: 13px 24px; border-radius: 999px;
  font-size: 15px; font-weight: 600; letter-spacing: .02em;
  transition: transform .25s var(--ease), background .25s, box-shadow .25s;
  box-shadow: 0 8px 20px -8px rgba(230, 33, 42, .55);
}
.btn:hover { background: var(--red-dark); transform: translateY(-2px); }
.btn-sm { padding: 9px 18px; font-size: 14px; }
.btn-ghost {
  background: transparent; color: var(--ink);
  border: 1px solid var(--line); box-shadow: none;
}
.btn-ghost:hover { background: var(--soft); border-color: #d9d2ce; }
.btn-light { background: #fff; color: var(--ink-2); box-shadow: none; }
.btn-light:hover { background: #f3efed; }
.btn-outline-light {
  background: transparent; color: #fff; border: 1px solid rgba(255,255,255,.35); box-shadow: none;
}
.btn-outline-light:hover { background: rgba(255,255,255,.1); }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.86);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s;
}
.site-header.scrolled { border-bottom-color: var(--line); }
.header-inner { display: flex; align-items: center; gap: 32px; height: 76px; }
.brand img { height: 38px; width: auto; }
.nav { display: flex; gap: 26px; margin-inline: auto; }
.nav a { font-size: 14.5px; color: #4c433f; position: relative; padding: 6px 0; }
.nav a::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 0;
  background: var(--red); transition: width .25s var(--ease);
}
.nav a:hover { color: var(--ink); }
.nav a:hover::after { width: 100%; }

.nav-toggle {
  display: none; margin-left: auto; width: 40px; height: 40px;
  border: 0; background: none; padding: 8px; cursor: pointer;
}
.nav-toggle span {
  display: block; height: 2px; background: var(--ink); margin: 4px 0;
  transition: transform .3s, opacity .3s;
}

/* ---------- hero ---------- */
.hero { position: relative; overflow: hidden; padding: 92px 0 84px; }
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(900px 500px at 85% 20%, rgba(230,33,42,.06), transparent 60%),
    linear-gradient(180deg, #fff 0%, #fdfbfa 100%);
}
.hero-inner { display: grid; grid-template-columns: 1.15fr .85fr; align-items: center; gap: 48px; }
.eyebrow {
  font-size: 12px; font-weight: 700; letter-spacing: .18em;
  color: var(--red); text-transform: uppercase; margin-bottom: 18px;
}
.hero h1 {
  font-size: clamp(40px, 6vw, 72px); font-weight: 800; letter-spacing: -.03em; line-height: 1.05;
}
.hero h1 em { font-style: normal; color: var(--red); }
.lead { margin-top: 24px; max-width: 34em; color: var(--muted); font-size: 17px; }
.hero-actions { display: flex; gap: 14px; margin-top: 34px; flex-wrap: wrap; }

.hero-art { position: relative; aspect-ratio: 1; }
.art-grid {
  position: absolute; inset: 8%;
  background-image: radial-gradient(rgba(52,44,42,.18) 1px, transparent 1px);
  background-size: 22px 22px;
  mask-image: radial-gradient(circle at 55% 45%, #000 0%, transparent 68%);
}
.art-ring {
  position: absolute; inset: 14%;
  border: 1px solid rgba(52,44,42,.14); border-radius: 50%;
}
.art-ring::after {
  content: ""; position: absolute; inset: 18%; border-radius: 50%;
  border: 1px dashed rgba(230,33,42,.35);
}
.art-arrow {
  position: absolute; left: 50%; top: 50%; width: 42%; height: auto;
  transform: translate(-50%, -50%) rotate(-4deg);
  filter: drop-shadow(0 20px 32px rgba(230,33,42,.22));
  animation: float 7s ease-in-out infinite;
}
.art-dot {
  position: absolute; left: 18%; bottom: 18%;
  width: 14px; height: 14px; border-radius: 50%; background: var(--ink);
}
@keyframes float { 50% { transform: translate(-50%, -55%) rotate(-1deg); } }

/* ---------- stats ---------- */
.stats { border-block: 1px solid var(--line); background: #fff; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat { padding: 34px 24px; border-left: 1px solid var(--line); }
.stat:first-child { border-left: 0; }
.stat strong {
  display: block; font-size: 40px; font-weight: 800; letter-spacing: -.03em;
  color: var(--ink); line-height: 1;
}
.stat strong span { font-size: 18px; font-weight: 700; color: var(--red); margin-left: 2px; }
.stat p { color: var(--muted); font-size: 14px; margin-top: 10px; }

/* ---------- sections ---------- */
.section { padding: 96px 0; }
.section-soft { background: var(--soft); }
.section-head { max-width: 640px; margin-bottom: 48px; }
.section-head h2, .why-copy h2, .cta h2 {
  font-size: clamp(28px, 3.4vw, 40px); font-weight: 800; letter-spacing: -.02em;
}
.section-sub { color: var(--muted); margin-top: 14px; font-size: 16px; }

/* ---------- cards ---------- */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px 24px 30px;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .35s;
}
.card:hover {
  transform: translateY(-6px);
  border-color: #e2dbd7;
  box-shadow: 0 24px 48px -28px rgba(52,44,42,.28);
}
.card .icon {
  width: 46px; height: 46px; border-radius: 12px;
  display: grid; place-items: center;
  background: rgba(230,33,42,.08); color: var(--red);
  margin-bottom: 20px;
}
.card .icon svg { width: 24px; height: 24px; }
.card h3 { font-size: 18px; margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 14.5px; }

/* ---------- why ---------- */
.why-grid { display: grid; grid-template-columns: .95fr 1.05fr; gap: 72px; align-items: start; }
.why-copy { position: sticky; top: 110px; }
.why-list { list-style: none; margin: 0; padding: 0; }
.why-list li { display: flex; gap: 22px; padding: 26px 0; border-top: 1px solid var(--line); }
.why-list li:last-child { border-bottom: 1px solid var(--line); }
.num { font-size: 13px; font-weight: 800; letter-spacing: .1em; color: var(--red); padding-top: 4px; }
.why-list h3 { font-size: 19px; margin-bottom: 6px; }
.why-list p { color: var(--muted); font-size: 15px; }

.link-arrow {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--red); font-weight: 600; font-size: 15px; margin-top: 26px;
}
.link-arrow span { transition: transform .25s var(--ease); }
.link-arrow:hover span { transform: translateX(5px); }

/* ---------- cases ---------- */
.cases { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.case {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 26px;
  background: #fff; display: flex; flex-direction: column;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.case:hover { transform: translateY(-6px); box-shadow: 0 24px 48px -28px rgba(52,44,42,.28); }
.tag {
  display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: .08em;
  color: var(--red); background: rgba(230,33,42,.08);
  padding: 5px 12px; border-radius: 999px;
}
.case h3 { font-size: 19px; margin: 18px 0 10px; }
.case p { color: var(--muted); font-size: 14.5px; flex: 1; }

/* ---------- news ---------- */
.news { display: grid; gap: 0; }
.news-item {
  display: grid; grid-template-columns: 120px 1fr auto; align-items: center; gap: 24px;
  padding: 26px 4px; border-top: 1px solid var(--line);
  transition: background .25s, padding .25s;
}
.news-item:last-child { border-bottom: 1px solid var(--line); }
.news-item:hover { background: #fff; padding-inline: 16px; }
.news-item time { font-size: 13px; color: var(--muted); letter-spacing: .04em; }
.news-item h3 { font-size: 17.5px; font-weight: 600; }
.news-item .link-arrow { margin: 0; font-size: 14px; }

/* ---------- cta ---------- */
.cta { background: var(--ink-2); color: #fff; padding: 84px 0; position: relative; overflow: hidden; }
.cta::after {
  content: ""; position: absolute; right: -120px; top: -120px; width: 420px; height: 420px;
  border-radius: 50%; border: 1px solid rgba(255,255,255,.08);
}
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
.cta p { color: rgba(255,255,255,.66); margin-top: 14px; }
.cta-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- footer ---------- */
.site-footer { background: var(--soft); border-top: 1px solid var(--line); padding: 64px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; }
.footer-brand img { height: 34px; width: auto; }
.footer-brand p { color: var(--muted); font-size: 13.5px; margin-top: 14px; letter-spacing: .02em; }
.footer-col h4 { font-size: 13px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink); margin-bottom: 16px; }
.footer-col a, .footer-col p { display: block; color: var(--muted); font-size: 14px; margin-bottom: 10px; }
.footer-col a:hover { color: var(--red); }
.footer-bottom {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  border-top: 1px solid var(--line); margin-top: 48px; padding-top: 22px;
}
.footer-bottom p { color: #9a918c; font-size: 12.5px; }

/* ---------- reveal ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .art-arrow { animation: none; }
}

/* ---------- responsive ---------- */
@media (max-width: 1024px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .why-grid { gap: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 860px) {
  .hero { padding: 64px 0 56px; }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-art { width: min(360px, 100%); justify-self: center; margin-inline: 0; order: -1; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat { border-top: 1px solid var(--line); }
  .stat:nth-child(-n+2) { border-top: 0; }
  .stat:nth-child(odd) { border-left: 0; }
  .why-grid { grid-template-columns: 1fr; }
  .why-copy { position: static; }
  .cases { grid-template-columns: 1fr; }

  .nav {
    position: absolute; top: 76px; left: 0; right: 0;
    flex-direction: column; gap: 0; padding: 12px 24px 20px;
    background: #fff; border-bottom: 1px solid var(--line);
    display: none;
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px 0; border-bottom: 1px solid var(--soft); }
  .nav-toggle { display: block; }
  .header-inner .btn-sm { display: none; }
  .news-item { grid-template-columns: 1fr; gap: 8px; }
}

@media (max-width: 560px) {
  .wrap { width: calc(100% - 36px); }
  .section { padding: 64px 0; }
  .cards { grid-template-columns: 1fr; }
  .brand img { height: 32px; }
  .footer-grid { grid-template-columns: 1fr; }
}

/* ============ 4-D / values / clients / about ============ */
.section-foot { margin-top: 30px; color: var(--muted); font-size: 15px; }
.section-foot strong { color: var(--ink); font-weight: 600; }

.method {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
}
.method li { padding: 30px 26px 34px; border-right: 1px solid var(--line); }
.method li:first-child { padding-left: 0; }
.method li:last-child { border-right: 0; padding-right: 0; }
.method .d {
  display: block; font-size: 46px; font-weight: 800; line-height: 1;
  color: var(--red); letter-spacing: -.02em;
}
.method h3 { font-size: 18px; margin: 16px 0 8px; }
.method h3 span { display: block; font-size: 13px; font-weight: 500; color: var(--muted); margin-top: 5px; }
.method p { color: var(--muted); font-size: 14.5px; }

.values { border-block: 1px solid var(--line); background: #fff; }
.values-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.value { padding: 30px 26px; border-left: 1px solid var(--line); }
.value:first-child { border-left: 0; padding-left: 0; }
.value h3 { font-size: 16px; margin-bottom: 6px; }
.value h3::before {
  content: ""; display: inline-block; width: 6px; height: 6px;
  border-radius: 50%; background: var(--red); margin-right: 9px; vertical-align: middle;
}
.value p { color: var(--muted); font-size: 13.5px; }

.clients {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(5, 1fr);
  border-top: 1px solid var(--line); border-left: 1px solid var(--line);
}
.clients li {
  display: flex; align-items: center; justify-content: center; text-align: center;
  min-height: 84px; padding: 20px 14px;
  border-right: 1px solid var(--line); border-bottom: 1px solid var(--line);
  font-size: 14px; color: #4c433f;
  transition: background .25s, color .25s;
}
.clients li:hover { background: var(--soft); color: var(--ink); }

.about-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 64px; align-items: start; }
.about-copy > p { color: var(--muted); margin-top: 16px; font-size: 15.5px; }
.about-vision { border-left: 3px solid var(--red); padding-left: 16px; }
.about-vision strong { color: var(--ink); margin-right: 8px; }

@media (max-width: 1024px) {
  .clients { grid-template-columns: repeat(3, 1fr); }
  .about-grid { grid-template-columns: 1fr; gap: 44px; }
  .method { grid-template-columns: 1fr 1fr; }
  .method li:nth-child(2n) { border-right: 0; }
  .method li:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .values-grid { grid-template-columns: 1fr 1fr; }
  .value { border-top: 1px solid var(--line); }
  .value:nth-child(-n+2) { border-top: 0; }
  .value:nth-child(odd) { border-left: 0; padding-left: 0; }
}

@media (max-width: 560px) {
  .clients { grid-template-columns: 1fr 1fr; }
  .method { grid-template-columns: 1fr; }
  .method li { border-right: 0; border-bottom: 1px solid var(--line); padding-left: 0; padding-right: 0; }
  .method li:last-child { border-bottom: 0; }
  .values-grid { grid-template-columns: 1fr; }
  .value { border-top: 1px solid var(--line); padding-left: 0; }
  .value:first-child { border-top: 0; }
  .stats-grid .stat p { font-size: 12.5px; }
}

/* ============ language switch & EN typography ============ */
.lang-switch {
  font-size: 13px; font-weight: 700; letter-spacing: .08em;
  color: var(--muted); margin-left: 6px; padding: 6px 4px;
  border-bottom: 1px solid transparent; transition: color .2s, border-color .2s;
}
.lang-switch:hover { color: var(--red); border-bottom-color: var(--red); }

.lang-en body, body.lang-en {
  font-family: "Helvetica Neue", -apple-system, "Segoe UI", Arial, sans-serif;
}
body.lang-en .hero h1 { letter-spacing: -.035em; }
body.lang-en .lead { max-width: 38em; font-size: 17.5px; }
body.lang-en .method h3 span { letter-spacing: .01em; }
body.lang-en .clients li { font-size: 13.5px; }
body.lang-en .footer-bottom a { color: var(--muted); }
body.lang-en .footer-bottom a:hover { color: var(--red); }

@media (max-width: 860px) {
  .lang-switch { margin-left: auto; margin-right: 14px; }
}

.footer-motto {
  margin-top: 6px !important;
  font-size: 12.5px;
  color: #9a918c;
  letter-spacing: .04em;
}

/* ============ inner pages ============ */
.page-hero {
  padding: 84px 0 56px;
  background: linear-gradient(180deg, #fff 0%, #fdfbfa 100%);
  border-bottom: 1px solid var(--line);
}
.page-hero h1 {
  font-size: clamp(34px, 4.6vw, 58px); font-weight: 800;
  letter-spacing: -.03em; line-height: 1.08; max-width: 16em;
}
.page-hero .lead { margin-top: 22px; max-width: 46em; color: var(--muted); font-size: 17px; }

.nav a.active { color: var(--ink); }
.nav a.active::after { width: 100%; }

/* logo wall — card style（对照公司介绍第 7 页） */
.logo-wall {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.logo-wall li {
  display: flex; align-items: center; justify-content: center;
  min-height: 136px; min-width: 0; padding: 26px 34px; background: #fff;
  border-radius: 8px;
  box-shadow: 0 4px 16px -8px rgba(52, 44, 42, .22), 0 1px 2px rgba(52, 44, 42, .05);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.logo-wall li:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 32px -14px rgba(52, 44, 42, .3), 0 1px 2px rgba(52, 44, 42, .05);
}
.logo-wall img {
  max-height: 46px; width: auto; max-width: 100%;
  transition: transform .3s var(--ease);
}
.logo-wall-lg li { min-height: 140px; }
.logo-wall-lg img { max-height: 52px; }
.logo-wall img.opt { max-height: 56px; }
.logo-wall-lg img.opt { max-height: 62px; }


/* solution blocks */
.sol-block {
  display: grid; grid-template-columns: 280px 1fr; gap: 48px;
  padding: 46px 0; border-top: 1px solid var(--line);
}
.sol-block:last-child { border-bottom: 1px solid var(--line); }
.sol-block h2 { font-size: 24px; margin-top: 6px; }
.sol-block p { color: var(--muted); font-size: 15.5px; }
.chips { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 20px 0 0; }
.chips li {
  font-size: 12.5px; color: #4c433f; padding: 5px 12px;
  border: 1px solid var(--line); border-radius: 999px; background: #fff;
}

/* steps */
.steps {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
}
.steps li { padding: 30px 26px; border-right: 1px solid var(--line); }
.steps li:first-child { padding-left: 0; }
.steps li:last-child { border-right: 0; padding-right: 0; }
.steps .num { font-size: 12px; font-weight: 800; letter-spacing: .12em; color: var(--red); }
.steps h3 { font-size: 18px; margin: 12px 0 8px; }
.steps p { color: var(--muted); font-size: 14.5px; }

/* facts + quote cards */
.facts {
  list-style: none; margin: 30px 0 0; padding: 0;
  display: grid; grid-template-columns: 1fr 1fr; gap: 20px 28px;
}
.facts li { border-left: 2px solid var(--red); padding-left: 14px; }
.facts strong { display: block; font-size: 26px; font-weight: 800; letter-spacing: -.02em; }
.facts span { color: var(--muted); font-size: 13.5px; }
.about-side { display: flex; flex-direction: column; gap: 16px; }
.quote-card {
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 28px; background: #fff;
}
.quote-card p:last-child { color: var(--muted); margin-top: 10px; font-size: 15px; }

/* milestones */
.milestones { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 44px; }
.milestones div { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 24px; }
.milestones strong { display: block; color: var(--red); font-size: 12.5px; letter-spacing: .08em; margin-bottom: 8px; }
.milestones span { color: var(--muted); font-size: 14px; }

/* contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.contact-card {
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 32px; background: #fff;
}
.contact-card h3 { font-size: 14px; color: var(--muted); font-weight: 600; margin-bottom: 12px; letter-spacing: .02em; }
.contact-value { font-size: 21px; font-weight: 700; letter-spacing: -.01em; }
.contact-value a:hover { color: var(--red); }
.contact-note { color: var(--muted); font-size: 13.5px; margin-top: 10px; }
.contact-cta { display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }

@media (max-width: 1024px) {
  .logo-wall { grid-template-columns: repeat(3, 1fr); }
  .sol-block { grid-template-columns: 1fr; gap: 18px; }
  .steps { grid-template-columns: 1fr 1fr; }
  .steps li:nth-child(2n) { border-right: 0; }
  .steps li:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .milestones { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .logo-wall { grid-template-columns: 1fr 1fr; gap: 30px 24px; }
  .logo-wall img { max-width: 140px; }
  .contact-grid { grid-template-columns: 1fr; }
  .facts { grid-template-columns: 1fr; }
  .page-hero { padding: 58px 0 40px; }
}